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_rdev(
 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_TDLS_INITIATOR] = { .type = NLA_FLAG },
 341         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 343                                       .len = IEEE80211_MAX_DATA_LEN },
 344         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 345         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 347                 .len = NL80211_HT_CAPABILITY_LEN
 348         },
 349         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 350         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 351         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 352         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 353         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 354         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 355         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 356         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 357         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 358         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 359         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 360         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 361         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 362         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 363         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 364         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 365         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 366                 .len = NL80211_VHT_CAPABILITY_LEN,
 367         },
 368         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 369         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 370                                   .len = IEEE80211_MAX_DATA_LEN },
 371         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 372         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 373         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 374         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 375         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 376         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 377         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 380         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 381         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 382         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 383         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 384         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 385                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 386         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 387         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 388         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 389         [NL80211_ATTR_IFACE_SOCKET_OWNER] = { .type = NLA_FLAG },
 390         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 391 };
 392
 393 /* policy for the key attributes */
 394 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 395         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 396         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 397         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 398         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 399         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 400         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 401         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 402         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 403 };
 404
 405 /* policy for the key default flags */
 406 static const struct nla_policy
 407 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 408         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 409         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 410 };
 411
 412 /* policy for WoWLAN attributes */
 413 static const struct nla_policy
 414 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 415         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 416         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 417         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 418         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 419         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 420         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 421         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 422         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 423         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 424 };
 425
 426 static const struct nla_policy
 427 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 428         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 429         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 430         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 431         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 432         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 433         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 434         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 435                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 436         },
 437         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 438                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 439         },
 440         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 441         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 442         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 443 };
 444
 445 /* policy for coalesce rule attributes */
 446 static const struct nla_policy
 447 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 448         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 449         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 450         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 451 };
 452
 453 /* policy for GTK rekey offload attributes */
 454 static const struct nla_policy
 455 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 456         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 457         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 458         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 459 };
 460
 461 static const struct nla_policy
 462 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 463         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 464                                                  .len = IEEE80211_MAX_SSID_LEN },
 465         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 466 };
 467
 468 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 469                                      struct netlink_callback *cb,
 470                                      struct cfg80211_registered_device **rdev,
 471                                      struct wireless_dev **wdev)
 472 {
 473         int err;
 474
 475         rtnl_lock();
 476
 477         if (!cb->args[0]) {
 478                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 479                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 480                                   nl80211_policy);
 481                 if (err)
 482                         goto out_unlock;
 483
 484                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 485                                                    nl80211_fam.attrbuf);
 486                 if (IS_ERR(*wdev)) {
 487                         err = PTR_ERR(*wdev);
 488                         goto out_unlock;
 489                 }
 490                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 491                 /* 0 is the first index - add 1 to parse only once */
 492                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 493                 cb->args[1] = (*wdev)->identifier;
 494         } else {
 495                 /* subtract the 1 again here */
 496                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 497                 struct wireless_dev *tmp;
 498
 499                 if (!wiphy) {
 500                         err = -ENODEV;
 501                         goto out_unlock;
 502                 }
 503                 *rdev = wiphy_to_rdev(wiphy);
 504                 *wdev = NULL;
 505
 506                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 507                         if (tmp->identifier == cb->args[1]) {
 508                                 *wdev = tmp;
 509                                 break;
 510                         }
 511                 }
 512
 513                 if (!*wdev) {
 514                         err = -ENODEV;
 515                         goto out_unlock;
 516                 }
 517         }
 518
 519         return 0;
 520  out_unlock:
 521         rtnl_unlock();
 522         return err;
 523 }
 524
 525 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 526 {
 527         rtnl_unlock();
 528 }
 529
 530 /* IE validation */
 531 static bool is_valid_ie_attr(const struct nlattr *attr)
 532 {
 533         const u8 *pos;
 534         int len;
 535
 536         if (!attr)
 537                 return true;
 538
 539         pos = nla_data(attr);
 540         len = nla_len(attr);
 541
 542         while (len) {
 543                 u8 elemlen;
 544
 545                 if (len < 2)
 546                         return false;
 547                 len -= 2;
 548
 549                 elemlen = pos[1];
 550                 if (elemlen > len)
 551                         return false;
 552
 553                 len -= elemlen;
 554                 pos += 2 + elemlen;
 555         }
 556
 557         return true;
 558 }
 559
 560 /* message building helper */
 561 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 562                                    int flags, u8 cmd)
 563 {
 564         /* since there is no private header just add the generic one */
 565         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 566 }
 567
 568 static int nl80211_msg_put_channel(struct sk_buff *msg,
 569                                    struct ieee80211_channel *chan,
 570                                    bool large)
 571 {
 572         /* Some channels must be completely excluded from the
 573          * list to protect old user-space tools from breaking
 574          */
 575         if (!large && chan->flags &
 576             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 577                 return 0;
 578
 579         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 580                         chan->center_freq))
 581                 goto nla_put_failure;
 582
 583         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 584             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 585                 goto nla_put_failure;
 586         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 587                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 588                         goto nla_put_failure;
 589                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 590                         goto nla_put_failure;
 591         }
 592         if (chan->flags & IEEE80211_CHAN_RADAR) {
 593                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 594                         goto nla_put_failure;
 595                 if (large) {
 596                         u32 time;
 597
 598                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 599
 600                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 601                                         chan->dfs_state))
 602                                 goto nla_put_failure;
 603                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 604                                         time))
 605                                 goto nla_put_failure;
 606                         if (nla_put_u32(msg,
 607                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 608                                         chan->dfs_cac_ms))
 609                                 goto nla_put_failure;
 610                 }
 611         }
 612
 613         if (large) {
 614                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 615                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 616                         goto nla_put_failure;
 617                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 618                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 619                         goto nla_put_failure;
 620                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 621                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 622                         goto nla_put_failure;
 623                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 624                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 625                         goto nla_put_failure;
 626                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 627                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 628                         goto nla_put_failure;
 629                 if ((chan->flags & IEEE80211_CHAN_GO_CONCURRENT) &&
 630                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_GO_CONCURRENT))
 631                         goto nla_put_failure;
 632                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 633                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 634                         goto nla_put_failure;
 635                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 636                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 637                         goto nla_put_failure;
 638         }
 639
 640         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 641                         DBM_TO_MBM(chan->max_power)))
 642                 goto nla_put_failure;
 643
 644         return 0;
 645
 646  nla_put_failure:
 647         return -ENOBUFS;
 648 }
 649
 650 /* netlink command implementations */
 651
 652 struct key_parse {
 653         struct key_params p;
 654         int idx;
 655         int type;
 656         bool def, defmgmt;
 657         bool def_uni, def_multi;
 658 };
 659
 660 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 661 {
 662         struct nlattr *tb[NL80211_KEY_MAX + 1];
 663         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 664                                    nl80211_key_policy);
 665         if (err)
 666                 return err;
 667
 668         k->def = !!tb[NL80211_KEY_DEFAULT];
 669         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 670
 671         if (k->def) {
 672                 k->def_uni = true;
 673                 k->def_multi = true;
 674         }
 675         if (k->defmgmt)
 676                 k->def_multi = true;
 677
 678         if (tb[NL80211_KEY_IDX])
 679                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 680
 681         if (tb[NL80211_KEY_DATA]) {
 682                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 683                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 684         }
 685
 686         if (tb[NL80211_KEY_SEQ]) {
 687                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 688                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 689         }
 690
 691         if (tb[NL80211_KEY_CIPHER])
 692                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 693
 694         if (tb[NL80211_KEY_TYPE]) {
 695                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 696                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 697                         return -EINVAL;
 698         }
 699
 700         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 701                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 702                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 703                                        tb[NL80211_KEY_DEFAULT_TYPES],
 704                                        nl80211_key_default_policy);
 705                 if (err)
 706                         return err;
 707
 708                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 709                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 710         }
 711
 712         return 0;
 713 }
 714
 715 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 716 {
 717         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 718                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 719                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 720         }
 721
 722         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 723                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 724                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 725         }
 726
 727         if (info->attrs[NL80211_ATTR_KEY_IDX])
 728                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 729
 730         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 731                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 732
 733         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 734         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 735
 736         if (k->def) {
 737                 k->def_uni = true;
 738                 k->def_multi = true;
 739         }
 740         if (k->defmgmt)
 741                 k->def_multi = true;
 742
 743         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 744                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 745                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 746                         return -EINVAL;
 747         }
 748
 749         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 750                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 751                 int err = nla_parse_nested(
 752                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 753                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 754                                 nl80211_key_default_policy);
 755                 if (err)
 756                         return err;
 757
 758                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 759                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 760         }
 761
 762         return 0;
 763 }
 764
 765 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 766 {
 767         int err;
 768
 769         memset(k, 0, sizeof(*k));
 770         k->idx = -1;
 771         k->type = -1;
 772
 773         if (info->attrs[NL80211_ATTR_KEY])
 774                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 775         else
 776                 err = nl80211_parse_key_old(info, k);
 777
 778         if (err)
 779                 return err;
 780
 781         if (k->def && k->defmgmt)
 782                 return -EINVAL;
 783
 784         if (k->defmgmt) {
 785                 if (k->def_uni || !k->def_multi)
 786                         return -EINVAL;
 787         }
 788
 789         if (k->idx != -1) {
 790                 if (k->defmgmt) {
 791                         if (k->idx < 4 || k->idx > 5)
 792                                 return -EINVAL;
 793                 } else if (k->def) {
 794                         if (k->idx < 0 || k->idx > 3)
 795                                 return -EINVAL;
 796                 } else {
 797                         if (k->idx < 0 || k->idx > 5)
 798                                 return -EINVAL;
 799                 }
 800         }
 801
 802         return 0;
 803 }
 804
 805 static struct cfg80211_cached_keys *
 806 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 807                        struct nlattr *keys, bool *no_ht)
 808 {
 809         struct key_parse parse;
 810         struct nlattr *key;
 811         struct cfg80211_cached_keys *result;
 812         int rem, err, def = 0;
 813
 814         result = kzalloc(sizeof(*result), GFP_KERNEL);
 815         if (!result)
 816                 return ERR_PTR(-ENOMEM);
 817
 818         result->def = -1;
 819         result->defmgmt = -1;
 820
 821         nla_for_each_nested(key, keys, rem) {
 822                 memset(&parse, 0, sizeof(parse));
 823                 parse.idx = -1;
 824
 825                 err = nl80211_parse_key_new(key, &parse);
 826                 if (err)
 827                         goto error;
 828                 err = -EINVAL;
 829                 if (!parse.p.key)
 830                         goto error;
 831                 if (parse.idx < 0 || parse.idx > 4)
 832                         goto error;
 833                 if (parse.def) {
 834                         if (def)
 835                                 goto error;
 836                         def = 1;
 837                         result->def = parse.idx;
 838                         if (!parse.def_uni || !parse.def_multi)
 839                                 goto error;
 840                 } else if (parse.defmgmt)
 841                         goto error;
 842                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 843                                                      parse.idx, false, NULL);
 844                 if (err)
 845                         goto error;
 846                 result->params[parse.idx].cipher = parse.p.cipher;
 847                 result->params[parse.idx].key_len = parse.p.key_len;
 848                 result->params[parse.idx].key = result->data[parse.idx];
 849                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 850
 851                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 852                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 853                         if (no_ht)
 854                                 *no_ht = true;
 855                 }
 856         }
 857
 858         return result;
 859  error:
 860         kfree(result);
 861         return ERR_PTR(err);
 862 }
 863
 864 static int nl80211_key_allowed(struct wireless_dev *wdev)
 865 {
 866         ASSERT_WDEV_LOCK(wdev);
 867
 868         switch (wdev->iftype) {
 869         case NL80211_IFTYPE_AP:
 870         case NL80211_IFTYPE_AP_VLAN:
 871         case NL80211_IFTYPE_P2P_GO:
 872         case NL80211_IFTYPE_MESH_POINT:
 873                 break;
 874         case NL80211_IFTYPE_ADHOC:
 875         case NL80211_IFTYPE_STATION:
 876         case NL80211_IFTYPE_P2P_CLIENT:
 877                 if (!wdev->current_bss)
 878                         return -ENOLINK;
 879                 break;
 880         default:
 881                 return -EINVAL;
 882         }
 883
 884         return 0;
 885 }
 886
 887 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 888                                                         struct nlattr *tb)
 889 {
 890         struct ieee80211_channel *chan;
 891
 892         if (tb == NULL)
 893                 return NULL;
 894         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 895         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 896                 return NULL;
 897         return chan;
 898 }
 899
 900 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 901 {
 902         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 903         int i;
 904
 905         if (!nl_modes)
 906                 goto nla_put_failure;
 907
 908         i = 0;
 909         while (ifmodes) {
 910                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 911                         goto nla_put_failure;
 912                 ifmodes >>= 1;
 913                 i++;
 914         }
 915
 916         nla_nest_end(msg, nl_modes);
 917         return 0;
 918
 919 nla_put_failure:
 920         return -ENOBUFS;
 921 }
 922
 923 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 924                                           struct sk_buff *msg,
 925                                           bool large)
 926 {
 927         struct nlattr *nl_combis;
 928         int i, j;
 929
 930         nl_combis = nla_nest_start(msg,
 931                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 932         if (!nl_combis)
 933                 goto nla_put_failure;
 934
 935         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 936                 const struct ieee80211_iface_combination *c;
 937                 struct nlattr *nl_combi, *nl_limits;
 938
 939                 c = &wiphy->iface_combinations[i];
 940
 941                 nl_combi = nla_nest_start(msg, i + 1);
 942                 if (!nl_combi)
 943                         goto nla_put_failure;
 944
 945                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 946                 if (!nl_limits)
 947                         goto nla_put_failure;
 948
 949                 for (j = 0; j < c->n_limits; j++) {
 950                         struct nlattr *nl_limit;
 951
 952                         nl_limit = nla_nest_start(msg, j + 1);
 953                         if (!nl_limit)
 954                                 goto nla_put_failure;
 955                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 956                                         c->limits[j].max))
 957                                 goto nla_put_failure;
 958                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 959                                                 c->limits[j].types))
 960                                 goto nla_put_failure;
 961                         nla_nest_end(msg, nl_limit);
 962                 }
 963
 964                 nla_nest_end(msg, nl_limits);
 965
 966                 if (c->beacon_int_infra_match &&
 967                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 968                         goto nla_put_failure;
 969                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 970                                 c->num_different_channels) ||
 971                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 972                                 c->max_interfaces))
 973                         goto nla_put_failure;
 974                 if (large &&
 975                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 976                                 c->radar_detect_widths) ||
 977                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
 978                                 c->radar_detect_regions)))
 979                         goto nla_put_failure;
 980
 981                 nla_nest_end(msg, nl_combi);
 982         }
 983
 984         nla_nest_end(msg, nl_combis);
 985
 986         return 0;
 987 nla_put_failure:
 988         return -ENOBUFS;
 989 }
 990
 991 #ifdef CONFIG_PM
 992 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 993                                         struct sk_buff *msg)
 994 {
 995         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 996         struct nlattr *nl_tcp;
 997
 998         if (!tcp)
 999                 return 0;
1000
1001         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1002         if (!nl_tcp)
1003                 return -ENOBUFS;
1004
1005         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1006                         tcp->data_payload_max))
1007                 return -ENOBUFS;
1008
1009         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1010                         tcp->data_payload_max))
1011                 return -ENOBUFS;
1012
1013         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1014                 return -ENOBUFS;
1015
1016         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1017                                 sizeof(*tcp->tok), tcp->tok))
1018                 return -ENOBUFS;
1019
1020         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1021                         tcp->data_interval_max))
1022                 return -ENOBUFS;
1023
1024         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1025                         tcp->wake_payload_max))
1026                 return -ENOBUFS;
1027
1028         nla_nest_end(msg, nl_tcp);
1029         return 0;
1030 }
1031
1032 static int nl80211_send_wowlan(struct sk_buff *msg,
1033                                struct cfg80211_registered_device *rdev,
1034                                bool large)
1035 {
1036         struct nlattr *nl_wowlan;
1037
1038         if (!rdev->wiphy.wowlan)
1039                 return 0;
1040
1041         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1042         if (!nl_wowlan)
1043                 return -ENOBUFS;
1044
1045         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1046              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1047             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1048              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1049             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1050              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1051             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1052              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1053             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1054              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1055             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1056              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1057             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1058              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1059             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1060              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1061                 return -ENOBUFS;
1062
1063         if (rdev->wiphy.wowlan->n_patterns) {
1064                 struct nl80211_pattern_support pat = {
1065                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1066                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1067                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1068                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1069                 };
1070
1071                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1072                             sizeof(pat), &pat))
1073                         return -ENOBUFS;
1074         }
1075
1076         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1077                 return -ENOBUFS;
1078
1079         nla_nest_end(msg, nl_wowlan);
1080
1081         return 0;
1082 }
1083 #endif
1084
1085 static int nl80211_send_coalesce(struct sk_buff *msg,
1086                                  struct cfg80211_registered_device *rdev)
1087 {
1088         struct nl80211_coalesce_rule_support rule;
1089
1090         if (!rdev->wiphy.coalesce)
1091                 return 0;
1092
1093         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1094         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1095         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1096         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1097         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1098         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1099
1100         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1101                 return -ENOBUFS;
1102
1103         return 0;
1104 }
1105
1106 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1107                                       struct ieee80211_supported_band *sband)
1108 {
1109         struct nlattr *nl_rates, *nl_rate;
1110         struct ieee80211_rate *rate;
1111         int i;
1112
1113         /* add HT info */
1114         if (sband->ht_cap.ht_supported &&
1115             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1116                      sizeof(sband->ht_cap.mcs),
1117                      &sband->ht_cap.mcs) ||
1118              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1119                          sband->ht_cap.cap) ||
1120              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1121                         sband->ht_cap.ampdu_factor) ||
1122              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1123                         sband->ht_cap.ampdu_density)))
1124                 return -ENOBUFS;
1125
1126         /* add VHT info */
1127         if (sband->vht_cap.vht_supported &&
1128             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1129                      sizeof(sband->vht_cap.vht_mcs),
1130                      &sband->vht_cap.vht_mcs) ||
1131              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1132                          sband->vht_cap.cap)))
1133                 return -ENOBUFS;
1134
1135         /* add bitrates */
1136         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1137         if (!nl_rates)
1138                 return -ENOBUFS;
1139
1140         for (i = 0; i < sband->n_bitrates; i++) {
1141                 nl_rate = nla_nest_start(msg, i);
1142                 if (!nl_rate)
1143                         return -ENOBUFS;
1144
1145                 rate = &sband->bitrates[i];
1146                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1147                                 rate->bitrate))
1148                         return -ENOBUFS;
1149                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1150                     nla_put_flag(msg,
1151                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1152                         return -ENOBUFS;
1153
1154                 nla_nest_end(msg, nl_rate);
1155         }
1156
1157         nla_nest_end(msg, nl_rates);
1158
1159         return 0;
1160 }
1161
1162 static int
1163 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1164                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1165 {
1166         u16 stypes;
1167         struct nlattr *nl_ftypes, *nl_ifs;
1168         enum nl80211_iftype ift;
1169         int i;
1170
1171         if (!mgmt_stypes)
1172                 return 0;
1173
1174         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1175         if (!nl_ifs)
1176                 return -ENOBUFS;
1177
1178         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1179                 nl_ftypes = nla_nest_start(msg, ift);
1180                 if (!nl_ftypes)
1181                         return -ENOBUFS;
1182                 i = 0;
1183                 stypes = mgmt_stypes[ift].tx;
1184                 while (stypes) {
1185                         if ((stypes & 1) &&
1186                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1187                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1188                                 return -ENOBUFS;
1189                         stypes >>= 1;
1190                         i++;
1191                 }
1192                 nla_nest_end(msg, nl_ftypes);
1193         }
1194
1195         nla_nest_end(msg, nl_ifs);
1196
1197         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1198         if (!nl_ifs)
1199                 return -ENOBUFS;
1200
1201         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1202                 nl_ftypes = nla_nest_start(msg, ift);
1203                 if (!nl_ftypes)
1204                         return -ENOBUFS;
1205                 i = 0;
1206                 stypes = mgmt_stypes[ift].rx;
1207                 while (stypes) {
1208                         if ((stypes & 1) &&
1209                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1210                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1211                                 return -ENOBUFS;
1212                         stypes >>= 1;
1213                         i++;
1214                 }
1215                 nla_nest_end(msg, nl_ftypes);
1216         }
1217         nla_nest_end(msg, nl_ifs);
1218
1219         return 0;
1220 }
1221
1222 struct nl80211_dump_wiphy_state {
1223         s64 filter_wiphy;
1224         long start;
1225         long split_start, band_start, chan_start;
1226         bool split;
1227 };
1228
1229 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1230                               enum nl80211_commands cmd,
1231                               struct sk_buff *msg, u32 portid, u32 seq,
1232                               int flags, struct nl80211_dump_wiphy_state *state)
1233 {
1234         void *hdr;
1235         struct nlattr *nl_bands, *nl_band;
1236         struct nlattr *nl_freqs, *nl_freq;
1237         struct nlattr *nl_cmds;
1238         enum ieee80211_band band;
1239         struct ieee80211_channel *chan;
1240         int i;
1241         const struct ieee80211_txrx_stypes *mgmt_stypes =
1242                                 rdev->wiphy.mgmt_stypes;
1243         u32 features;
1244
1245         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1246         if (!hdr)
1247                 return -ENOBUFS;
1248
1249         if (WARN_ON(!state))
1250                 return -EINVAL;
1251
1252         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1253             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1254                            wiphy_name(&rdev->wiphy)) ||
1255             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1256                         cfg80211_rdev_list_generation))
1257                 goto nla_put_failure;
1258
1259         if (cmd != NL80211_CMD_NEW_WIPHY)
1260                 goto finish;
1261
1262         switch (state->split_start) {
1263         case 0:
1264                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1265                                rdev->wiphy.retry_short) ||
1266                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1267                                rdev->wiphy.retry_long) ||
1268                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1269                                 rdev->wiphy.frag_threshold) ||
1270                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1271                                 rdev->wiphy.rts_threshold) ||
1272                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1273                                rdev->wiphy.coverage_class) ||
1274                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1275                                rdev->wiphy.max_scan_ssids) ||
1276                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1277                                rdev->wiphy.max_sched_scan_ssids) ||
1278                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1279                                 rdev->wiphy.max_scan_ie_len) ||
1280                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1281                                 rdev->wiphy.max_sched_scan_ie_len) ||
1282                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1283                                rdev->wiphy.max_match_sets))
1284                         goto nla_put_failure;
1285
1286                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1287                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1288                         goto nla_put_failure;
1289                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1290                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1291                         goto nla_put_failure;
1292                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1293                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1294                         goto nla_put_failure;
1295                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1296                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1297                         goto nla_put_failure;
1298                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1299                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1300                         goto nla_put_failure;
1301                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1302                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1303                         goto nla_put_failure;
1304                 state->split_start++;
1305                 if (state->split)
1306                         break;
1307         case 1:
1308                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1309                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1310                             rdev->wiphy.cipher_suites))
1311                         goto nla_put_failure;
1312
1313                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1314                                rdev->wiphy.max_num_pmkids))
1315                         goto nla_put_failure;
1316
1317                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1318                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1319                         goto nla_put_failure;
1320
1321                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1322                                 rdev->wiphy.available_antennas_tx) ||
1323                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1324                                 rdev->wiphy.available_antennas_rx))
1325                         goto nla_put_failure;
1326
1327                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1328                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1329                                 rdev->wiphy.probe_resp_offload))
1330                         goto nla_put_failure;
1331
1332                 if ((rdev->wiphy.available_antennas_tx ||
1333                      rdev->wiphy.available_antennas_rx) &&
1334                     rdev->ops->get_antenna) {
1335                         u32 tx_ant = 0, rx_ant = 0;
1336                         int res;
1337                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1338                         if (!res) {
1339                                 if (nla_put_u32(msg,
1340                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1341                                                 tx_ant) ||
1342                                     nla_put_u32(msg,
1343                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1344                                                 rx_ant))
1345                                         goto nla_put_failure;
1346                         }
1347                 }
1348
1349                 state->split_start++;
1350                 if (state->split)
1351                         break;
1352         case 2:
1353                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1354                                         rdev->wiphy.interface_modes))
1355                                 goto nla_put_failure;
1356                 state->split_start++;
1357                 if (state->split)
1358                         break;
1359         case 3:
1360                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1361                 if (!nl_bands)
1362                         goto nla_put_failure;
1363
1364                 for (band = state->band_start;
1365                      band < IEEE80211_NUM_BANDS; band++) {
1366                         struct ieee80211_supported_band *sband;
1367
1368                         sband = rdev->wiphy.bands[band];
1369
1370                         if (!sband)
1371                                 continue;
1372
1373                         nl_band = nla_nest_start(msg, band);
1374                         if (!nl_band)
1375                                 goto nla_put_failure;
1376
1377                         switch (state->chan_start) {
1378                         case 0:
1379                                 if (nl80211_send_band_rateinfo(msg, sband))
1380                                         goto nla_put_failure;
1381                                 state->chan_start++;
1382                                 if (state->split)
1383                                         break;
1384                         default:
1385                                 /* add frequencies */
1386                                 nl_freqs = nla_nest_start(
1387                                         msg, NL80211_BAND_ATTR_FREQS);
1388                                 if (!nl_freqs)
1389                                         goto nla_put_failure;
1390
1391                                 for (i = state->chan_start - 1;
1392                                      i < sband->n_channels;
1393                                      i++) {
1394                                         nl_freq = nla_nest_start(msg, i);
1395                                         if (!nl_freq)
1396                                                 goto nla_put_failure;
1397
1398                                         chan = &sband->channels[i];
1399
1400                                         if (nl80211_msg_put_channel(
1401                                                         msg, chan,
1402                                                         state->split))
1403                                                 goto nla_put_failure;
1404
1405                                         nla_nest_end(msg, nl_freq);
1406                                         if (state->split)
1407                                                 break;
1408                                 }
1409                                 if (i < sband->n_channels)
1410                                         state->chan_start = i + 2;
1411                                 else
1412                                         state->chan_start = 0;
1413                                 nla_nest_end(msg, nl_freqs);
1414                         }
1415
1416                         nla_nest_end(msg, nl_band);
1417
1418                         if (state->split) {
1419                                 /* start again here */
1420                                 if (state->chan_start)
1421                                         band--;
1422                                 break;
1423                         }
1424                 }
1425                 nla_nest_end(msg, nl_bands);
1426
1427                 if (band < IEEE80211_NUM_BANDS)
1428                         state->band_start = band + 1;
1429                 else
1430                         state->band_start = 0;
1431
1432                 /* if bands & channels are done, continue outside */
1433                 if (state->band_start == 0 && state->chan_start == 0)
1434                         state->split_start++;
1435                 if (state->split)
1436                         break;
1437         case 4:
1438                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1439                 if (!nl_cmds)
1440                         goto nla_put_failure;
1441
1442                 i = 0;
1443 #define CMD(op, n)                                                      \
1444                  do {                                                   \
1445                         if (rdev->ops->op) {                            \
1446                                 i++;                                    \
1447                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1448                                         goto nla_put_failure;           \
1449                         }                                               \
1450                 } while (0)
1451
1452                 CMD(add_virtual_intf, NEW_INTERFACE);
1453                 CMD(change_virtual_intf, SET_INTERFACE);
1454                 CMD(add_key, NEW_KEY);
1455                 CMD(start_ap, START_AP);
1456                 CMD(add_station, NEW_STATION);
1457                 CMD(add_mpath, NEW_MPATH);
1458                 CMD(update_mesh_config, SET_MESH_CONFIG);
1459                 CMD(change_bss, SET_BSS);
1460                 CMD(auth, AUTHENTICATE);
1461                 CMD(assoc, ASSOCIATE);
1462                 CMD(deauth, DEAUTHENTICATE);
1463                 CMD(disassoc, DISASSOCIATE);
1464                 CMD(join_ibss, JOIN_IBSS);
1465                 CMD(join_mesh, JOIN_MESH);
1466                 CMD(set_pmksa, SET_PMKSA);
1467                 CMD(del_pmksa, DEL_PMKSA);
1468                 CMD(flush_pmksa, FLUSH_PMKSA);
1469                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1470                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1471                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1472                 CMD(mgmt_tx, FRAME);
1473                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1474                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1475                         i++;
1476                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1477                                 goto nla_put_failure;
1478                 }
1479                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1480                     rdev->ops->join_mesh) {
1481                         i++;
1482                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1483                                 goto nla_put_failure;
1484                 }
1485                 CMD(set_wds_peer, SET_WDS_PEER);
1486                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1487                         CMD(tdls_mgmt, TDLS_MGMT);
1488                         CMD(tdls_oper, TDLS_OPER);
1489                 }
1490                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1491                         CMD(sched_scan_start, START_SCHED_SCAN);
1492                 CMD(probe_client, PROBE_CLIENT);
1493                 CMD(set_noack_map, SET_NOACK_MAP);
1494                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1495                         i++;
1496                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1497                                 goto nla_put_failure;
1498                 }
1499                 CMD(start_p2p_device, START_P2P_DEVICE);
1500                 CMD(set_mcast_rate, SET_MCAST_RATE);
1501 #ifdef CONFIG_NL80211_TESTMODE
1502                 CMD(testmode_cmd, TESTMODE);
1503 #endif
1504                 if (state->split) {
1505                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1506                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1507                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1508                                 CMD(channel_switch, CHANNEL_SWITCH);
1509                         CMD(set_qos_map, SET_QOS_MAP);
1510                 }
1511                 /* add into the if now */
1512 #undef CMD
1513
1514                 if (rdev->ops->connect || rdev->ops->auth) {
1515                         i++;
1516                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1517                                 goto nla_put_failure;
1518                 }
1519
1520                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1521                         i++;
1522                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1523                                 goto nla_put_failure;
1524                 }
1525
1526                 nla_nest_end(msg, nl_cmds);
1527                 state->split_start++;
1528                 if (state->split)
1529                         break;
1530         case 5:
1531                 if (rdev->ops->remain_on_channel &&
1532                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1533                     nla_put_u32(msg,
1534                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1535                                 rdev->wiphy.max_remain_on_channel_duration))
1536                         goto nla_put_failure;
1537
1538                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1539                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1540                         goto nla_put_failure;
1541
1542                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1543                         goto nla_put_failure;
1544                 state->split_start++;
1545                 if (state->split)
1546                         break;
1547         case 6:
1548 #ifdef CONFIG_PM
1549                 if (nl80211_send_wowlan(msg, rdev, state->split))
1550                         goto nla_put_failure;
1551                 state->split_start++;
1552                 if (state->split)
1553                         break;
1554 #else
1555                 state->split_start++;
1556 #endif
1557         case 7:
1558                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1559                                         rdev->wiphy.software_iftypes))
1560                         goto nla_put_failure;
1561
1562                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1563                                                    state->split))
1564                         goto nla_put_failure;
1565
1566                 state->split_start++;
1567                 if (state->split)
1568                         break;
1569         case 8:
1570                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1571                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1572                                 rdev->wiphy.ap_sme_capa))
1573                         goto nla_put_failure;
1574
1575                 features = rdev->wiphy.features;
1576                 /*
1577                  * We can only add the per-channel limit information if the
1578                  * dump is split, otherwise it makes it too big. Therefore
1579                  * only advertise it in that case.
1580                  */
1581                 if (state->split)
1582                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1583                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1584                         goto nla_put_failure;
1585
1586                 if (rdev->wiphy.ht_capa_mod_mask &&
1587                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1588                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1589                             rdev->wiphy.ht_capa_mod_mask))
1590                         goto nla_put_failure;
1591
1592                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1593                     rdev->wiphy.max_acl_mac_addrs &&
1594                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1595                                 rdev->wiphy.max_acl_mac_addrs))
1596                         goto nla_put_failure;
1597
1598                 /*
1599                  * Any information below this point is only available to
1600                  * applications that can deal with it being split. This
1601                  * helps ensure that newly added capabilities don't break
1602                  * older tools by overrunning their buffers.
1603                  *
1604                  * We still increment split_start so that in the split
1605                  * case we'll continue with more data in the next round,
1606                  * but break unconditionally so unsplit data stops here.
1607                  */
1608                 state->split_start++;
1609                 break;
1610         case 9:
1611                 if (rdev->wiphy.extended_capabilities &&
1612                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1613                              rdev->wiphy.extended_capabilities_len,
1614                              rdev->wiphy.extended_capabilities) ||
1615                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1616                              rdev->wiphy.extended_capabilities_len,
1617                              rdev->wiphy.extended_capabilities_mask)))
1618                         goto nla_put_failure;
1619
1620                 if (rdev->wiphy.vht_capa_mod_mask &&
1621                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1622                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1623                             rdev->wiphy.vht_capa_mod_mask))
1624                         goto nla_put_failure;
1625
1626                 state->split_start++;
1627                 break;
1628         case 10:
1629                 if (nl80211_send_coalesce(msg, rdev))
1630                         goto nla_put_failure;
1631
1632                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1633                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1634                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1635                         goto nla_put_failure;
1636
1637                 if (rdev->wiphy.max_ap_assoc_sta &&
1638                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1639                                 rdev->wiphy.max_ap_assoc_sta))
1640                         goto nla_put_failure;
1641
1642                 state->split_start++;
1643                 break;
1644         case 11:
1645                 if (rdev->wiphy.n_vendor_commands) {
1646                         const struct nl80211_vendor_cmd_info *info;
1647                         struct nlattr *nested;
1648
1649                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1650                         if (!nested)
1651                                 goto nla_put_failure;
1652
1653                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1654                                 info = &rdev->wiphy.vendor_commands[i].info;
1655                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1656                                         goto nla_put_failure;
1657                         }
1658                         nla_nest_end(msg, nested);
1659                 }
1660
1661                 if (rdev->wiphy.n_vendor_events) {
1662                         const struct nl80211_vendor_cmd_info *info;
1663                         struct nlattr *nested;
1664
1665                         nested = nla_nest_start(msg,
1666                                                 NL80211_ATTR_VENDOR_EVENTS);
1667                         if (!nested)
1668                                 goto nla_put_failure;
1669
1670                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1671                                 info = &rdev->wiphy.vendor_events[i];
1672                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1673                                         goto nla_put_failure;
1674                         }
1675                         nla_nest_end(msg, nested);
1676                 }
1677                 state->split_start++;
1678                 break;
1679         case 12:
1680                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1681                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1682                                rdev->wiphy.max_num_csa_counters))
1683                         goto nla_put_failure;
1684
1685                 /* done */
1686                 state->split_start = 0;
1687                 break;
1688         }
1689  finish:
1690         return genlmsg_end(msg, hdr);
1691
1692  nla_put_failure:
1693         genlmsg_cancel(msg, hdr);
1694         return -EMSGSIZE;
1695 }
1696
1697 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1698                                     struct netlink_callback *cb,
1699                                     struct nl80211_dump_wiphy_state *state)
1700 {
1701         struct nlattr **tb = nl80211_fam.attrbuf;
1702         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1703                               tb, nl80211_fam.maxattr, nl80211_policy);
1704         /* ignore parse errors for backward compatibility */
1705         if (ret)
1706                 return 0;
1707
1708         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1709         if (tb[NL80211_ATTR_WIPHY])
1710                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1711         if (tb[NL80211_ATTR_WDEV])
1712                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1713         if (tb[NL80211_ATTR_IFINDEX]) {
1714                 struct net_device *netdev;
1715                 struct cfg80211_registered_device *rdev;
1716                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1717
1718                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1719                 if (!netdev)
1720                         return -ENODEV;
1721                 if (netdev->ieee80211_ptr) {
1722                         rdev = wiphy_to_rdev(
1723                                 netdev->ieee80211_ptr->wiphy);
1724                         state->filter_wiphy = rdev->wiphy_idx;
1725                 }
1726         }
1727
1728         return 0;
1729 }
1730
1731 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1732 {
1733         int idx = 0, ret;
1734         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1735         struct cfg80211_registered_device *rdev;
1736
1737         rtnl_lock();
1738         if (!state) {
1739                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1740                 if (!state) {
1741                         rtnl_unlock();
1742                         return -ENOMEM;
1743                 }
1744                 state->filter_wiphy = -1;
1745                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1746                 if (ret) {
1747                         kfree(state);
1748                         rtnl_unlock();
1749                         return ret;
1750                 }
1751                 cb->args[0] = (long)state;
1752         }
1753
1754         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1755                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1756                         continue;
1757                 if (++idx <= state->start)
1758                         continue;
1759                 if (state->filter_wiphy != -1 &&
1760                     state->filter_wiphy != rdev->wiphy_idx)
1761                         continue;
1762                 /* attempt to fit multiple wiphy data chunks into the skb */
1763                 do {
1764                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1765                                                  skb,
1766                                                  NETLINK_CB(cb->skb).portid,
1767                                                  cb->nlh->nlmsg_seq,
1768                                                  NLM_F_MULTI, state);
1769                         if (ret < 0) {
1770                                 /*
1771                                  * If sending the wiphy data didn't fit (ENOBUFS
1772                                  * or EMSGSIZE returned), this SKB is still
1773                                  * empty (so it's not too big because another
1774                                  * wiphy dataset is already in the skb) and
1775                                  * we've not tried to adjust the dump allocation
1776                                  * yet ... then adjust the alloc size to be
1777                                  * bigger, and return 1 but with the empty skb.
1778                                  * This results in an empty message being RX'ed
1779                                  * in userspace, but that is ignored.
1780                                  *
1781                                  * We can then retry with the larger buffer.
1782                                  */
1783                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1784                                     !skb->len && !state->split &&
1785                                     cb->min_dump_alloc < 4096) {
1786                                         cb->min_dump_alloc = 4096;
1787                                         state->split_start = 0;
1788                                         rtnl_unlock();
1789                                         return 1;
1790                                 }
1791                                 idx--;
1792                                 break;
1793                         }
1794                 } while (state->split_start > 0);
1795                 break;
1796         }
1797         rtnl_unlock();
1798
1799         state->start = idx;
1800
1801         return skb->len;
1802 }
1803
1804 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1805 {
1806         kfree((void *)cb->args[0]);
1807         return 0;
1808 }
1809
1810 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1811 {
1812         struct sk_buff *msg;
1813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1814         struct nl80211_dump_wiphy_state state = {};
1815
1816         msg = nlmsg_new(4096, GFP_KERNEL);
1817         if (!msg)
1818                 return -ENOMEM;
1819
1820         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1821                                info->snd_portid, info->snd_seq, 0,
1822                                &state) < 0) {
1823                 nlmsg_free(msg);
1824                 return -ENOBUFS;
1825         }
1826
1827         return genlmsg_reply(msg, info);
1828 }
1829
1830 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1831         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1832         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1833         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1834         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1835         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1836 };
1837
1838 static int parse_txq_params(struct nlattr *tb[],
1839                             struct ieee80211_txq_params *txq_params)
1840 {
1841         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1842             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1843             !tb[NL80211_TXQ_ATTR_AIFS])
1844                 return -EINVAL;
1845
1846         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1847         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1848         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1849         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1850         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1851
1852         if (txq_params->ac >= NL80211_NUM_ACS)
1853                 return -EINVAL;
1854
1855         return 0;
1856 }
1857
1858 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1859 {
1860         /*
1861          * You can only set the channel explicitly for WDS interfaces,
1862          * all others have their channel managed via their respective
1863          * "establish a connection" command (connect, join, ...)
1864          *
1865          * For AP/GO and mesh mode, the channel can be set with the
1866          * channel userspace API, but is only stored and passed to the
1867          * low-level driver when the AP starts or the mesh is joined.
1868          * This is for backward compatibility, userspace can also give
1869          * the channel in the start-ap or join-mesh commands instead.
1870          *
1871          * Monitors are special as they are normally slaved to
1872          * whatever else is going on, so they have their own special
1873          * operation to set the monitor channel if possible.
1874          */
1875         return !wdev ||
1876                 wdev->iftype == NL80211_IFTYPE_AP ||
1877                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1878                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1879                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1880 }
1881
1882 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1883                                  struct genl_info *info,
1884                                  struct cfg80211_chan_def *chandef)
1885 {
1886         u32 control_freq;
1887
1888         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1889                 return -EINVAL;
1890
1891         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1892
1893         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1894         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1895         chandef->center_freq1 = control_freq;
1896         chandef->center_freq2 = 0;
1897
1898         /* Primary channel not allowed */
1899         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1900                 return -EINVAL;
1901
1902         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1903                 enum nl80211_channel_type chantype;
1904
1905                 chantype = nla_get_u32(
1906                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1907
1908                 switch (chantype) {
1909                 case NL80211_CHAN_NO_HT:
1910                 case NL80211_CHAN_HT20:
1911                 case NL80211_CHAN_HT40PLUS:
1912                 case NL80211_CHAN_HT40MINUS:
1913                         cfg80211_chandef_create(chandef, chandef->chan,
1914                                                 chantype);
1915                         break;
1916                 default:
1917                         return -EINVAL;
1918                 }
1919         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1920                 chandef->width =
1921                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1922                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1923                         chandef->center_freq1 =
1924                                 nla_get_u32(
1925                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1926                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1927                         chandef->center_freq2 =
1928                                 nla_get_u32(
1929                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1930         }
1931
1932         if (!cfg80211_chandef_valid(chandef))
1933                 return -EINVAL;
1934
1935         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1936                                      IEEE80211_CHAN_DISABLED))
1937                 return -EINVAL;
1938
1939         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1940              chandef->width == NL80211_CHAN_WIDTH_10) &&
1941             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1942                 return -EINVAL;
1943
1944         return 0;
1945 }
1946
1947 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1948                                  struct net_device *dev,
1949                                  struct genl_info *info)
1950 {
1951         struct cfg80211_chan_def chandef;
1952         int result;
1953         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1954         struct wireless_dev *wdev = NULL;
1955
1956         if (dev)
1957                 wdev = dev->ieee80211_ptr;
1958         if (!nl80211_can_set_dev_channel(wdev))
1959                 return -EOPNOTSUPP;
1960         if (wdev)
1961                 iftype = wdev->iftype;
1962
1963         result = nl80211_parse_chandef(rdev, info, &chandef);
1964         if (result)
1965                 return result;
1966
1967         switch (iftype) {
1968         case NL80211_IFTYPE_AP:
1969         case NL80211_IFTYPE_P2P_GO:
1970                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, iftype)) {
1971                         result = -EINVAL;
1972                         break;
1973                 }
1974                 if (wdev->beacon_interval) {
1975                         if (!dev || !rdev->ops->set_ap_chanwidth ||
1976                             !(rdev->wiphy.features &
1977                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
1978                                 result = -EBUSY;
1979                                 break;
1980                         }
1981
1982                         /* Only allow dynamic channel width changes */
1983                         if (chandef.chan != wdev->preset_chandef.chan) {
1984                                 result = -EBUSY;
1985                                 break;
1986                         }
1987                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
1988                         if (result)
1989                                 break;
1990                 }
1991                 wdev->preset_chandef = chandef;
1992                 result = 0;
1993                 break;
1994         case NL80211_IFTYPE_MESH_POINT:
1995                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1996                 break;
1997         case NL80211_IFTYPE_MONITOR:
1998                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1999                 break;
2000         default:
2001                 result = -EINVAL;
2002         }
2003
2004         return result;
2005 }
2006
2007 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2008 {
2009         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2010         struct net_device *netdev = info->user_ptr[1];
2011
2012         return __nl80211_set_channel(rdev, netdev, info);
2013 }
2014
2015 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2016 {
2017         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2018         struct net_device *dev = info->user_ptr[1];
2019         struct wireless_dev *wdev = dev->ieee80211_ptr;
2020         const u8 *bssid;
2021
2022         if (!info->attrs[NL80211_ATTR_MAC])
2023                 return -EINVAL;
2024
2025         if (netif_running(dev))
2026                 return -EBUSY;
2027
2028         if (!rdev->ops->set_wds_peer)
2029                 return -EOPNOTSUPP;
2030
2031         if (wdev->iftype != NL80211_IFTYPE_WDS)
2032                 return -EOPNOTSUPP;
2033
2034         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2035         return rdev_set_wds_peer(rdev, dev, bssid);
2036 }
2037
2038
2039 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2040 {
2041         struct cfg80211_registered_device *rdev;
2042         struct net_device *netdev = NULL;
2043         struct wireless_dev *wdev;
2044         int result = 0, rem_txq_params = 0;
2045         struct nlattr *nl_txq_params;
2046         u32 changed;
2047         u8 retry_short = 0, retry_long = 0;
2048         u32 frag_threshold = 0, rts_threshold = 0;
2049         u8 coverage_class = 0;
2050
2051         ASSERT_RTNL();
2052
2053         /*
2054          * Try to find the wiphy and netdev. Normally this
2055          * function shouldn't need the netdev, but this is
2056          * done for backward compatibility -- previously
2057          * setting the channel was done per wiphy, but now
2058          * it is per netdev. Previous userland like hostapd
2059          * also passed a netdev to set_wiphy, so that it is
2060          * possible to let that go to the right netdev!
2061          */
2062
2063         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2064                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2065
2066                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2067                 if (netdev && netdev->ieee80211_ptr)
2068                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2069                 else
2070                         netdev = NULL;
2071         }
2072
2073         if (!netdev) {
2074                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2075                                                   info->attrs);
2076                 if (IS_ERR(rdev))
2077                         return PTR_ERR(rdev);
2078                 wdev = NULL;
2079                 netdev = NULL;
2080                 result = 0;
2081         } else
2082                 wdev = netdev->ieee80211_ptr;
2083
2084         /*
2085          * end workaround code, by now the rdev is available
2086          * and locked, and wdev may or may not be NULL.
2087          */
2088
2089         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2090                 result = cfg80211_dev_rename(
2091                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2092
2093         if (result)
2094                 return result;
2095
2096         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2097                 struct ieee80211_txq_params txq_params;
2098                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2099
2100                 if (!rdev->ops->set_txq_params)
2101                         return -EOPNOTSUPP;
2102
2103                 if (!netdev)
2104                         return -EINVAL;
2105
2106                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2107                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2108                         return -EINVAL;
2109
2110                 if (!netif_running(netdev))
2111                         return -ENETDOWN;
2112
2113                 nla_for_each_nested(nl_txq_params,
2114                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2115                                     rem_txq_params) {
2116                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2117                                            nla_data(nl_txq_params),
2118                                            nla_len(nl_txq_params),
2119                                            txq_params_policy);
2120                         if (result)
2121                                 return result;
2122                         result = parse_txq_params(tb, &txq_params);
2123                         if (result)
2124                                 return result;
2125
2126                         result = rdev_set_txq_params(rdev, netdev,
2127                                                      &txq_params);
2128                         if (result)
2129                                 return result;
2130                 }
2131         }
2132
2133         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2134                 result = __nl80211_set_channel(
2135                         rdev,
2136                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2137                         info);
2138                 if (result)
2139                         return result;
2140         }
2141
2142         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2143                 struct wireless_dev *txp_wdev = wdev;
2144                 enum nl80211_tx_power_setting type;
2145                 int idx, mbm = 0;
2146
2147                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2148                         txp_wdev = NULL;
2149
2150                 if (!rdev->ops->set_tx_power)
2151                         return -EOPNOTSUPP;
2152
2153                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2154                 type = nla_get_u32(info->attrs[idx]);
2155
2156                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2157                     (type != NL80211_TX_POWER_AUTOMATIC))
2158                         return -EINVAL;
2159
2160                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2161                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2162                         mbm = nla_get_u32(info->attrs[idx]);
2163                 }
2164
2165                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2166                 if (result)
2167                         return result;
2168         }
2169
2170         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2171             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2172                 u32 tx_ant, rx_ant;
2173                 if ((!rdev->wiphy.available_antennas_tx &&
2174                      !rdev->wiphy.available_antennas_rx) ||
2175                     !rdev->ops->set_antenna)
2176                         return -EOPNOTSUPP;
2177
2178                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2179                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2180
2181                 /* reject antenna configurations which don't match the
2182                  * available antenna masks, except for the "all" mask */
2183                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2184                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2185                         return -EINVAL;
2186
2187                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2188                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2189
2190                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2191                 if (result)
2192                         return result;
2193         }
2194
2195         changed = 0;
2196
2197         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2198                 retry_short = nla_get_u8(
2199                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2200                 if (retry_short == 0)
2201                         return -EINVAL;
2202
2203                 changed |= WIPHY_PARAM_RETRY_SHORT;
2204         }
2205
2206         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2207                 retry_long = nla_get_u8(
2208                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2209                 if (retry_long == 0)
2210                         return -EINVAL;
2211
2212                 changed |= WIPHY_PARAM_RETRY_LONG;
2213         }
2214
2215         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2216                 frag_threshold = nla_get_u32(
2217                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2218                 if (frag_threshold < 256)
2219                         return -EINVAL;
2220
2221                 if (frag_threshold != (u32) -1) {
2222                         /*
2223                          * Fragments (apart from the last one) are required to
2224                          * have even length. Make the fragmentation code
2225                          * simpler by stripping LSB should someone try to use
2226                          * odd threshold value.
2227                          */
2228                         frag_threshold &= ~0x1;
2229                 }
2230                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2231         }
2232
2233         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2234                 rts_threshold = nla_get_u32(
2235                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2236                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2237         }
2238
2239         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2240                 coverage_class = nla_get_u8(
2241                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2242                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2243         }
2244
2245         if (changed) {
2246                 u8 old_retry_short, old_retry_long;
2247                 u32 old_frag_threshold, old_rts_threshold;
2248                 u8 old_coverage_class;
2249
2250                 if (!rdev->ops->set_wiphy_params)
2251                         return -EOPNOTSUPP;
2252
2253                 old_retry_short = rdev->wiphy.retry_short;
2254                 old_retry_long = rdev->wiphy.retry_long;
2255                 old_frag_threshold = rdev->wiphy.frag_threshold;
2256                 old_rts_threshold = rdev->wiphy.rts_threshold;
2257                 old_coverage_class = rdev->wiphy.coverage_class;
2258
2259                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2260                         rdev->wiphy.retry_short = retry_short;
2261                 if (changed & WIPHY_PARAM_RETRY_LONG)
2262                         rdev->wiphy.retry_long = retry_long;
2263                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2264                         rdev->wiphy.frag_threshold = frag_threshold;
2265                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2266                         rdev->wiphy.rts_threshold = rts_threshold;
2267                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2268                         rdev->wiphy.coverage_class = coverage_class;
2269
2270                 result = rdev_set_wiphy_params(rdev, changed);
2271                 if (result) {
2272                         rdev->wiphy.retry_short = old_retry_short;
2273                         rdev->wiphy.retry_long = old_retry_long;
2274                         rdev->wiphy.frag_threshold = old_frag_threshold;
2275                         rdev->wiphy.rts_threshold = old_rts_threshold;
2276                         rdev->wiphy.coverage_class = old_coverage_class;
2277                 }
2278         }
2279         return 0;
2280 }
2281
2282 static inline u64 wdev_id(struct wireless_dev *wdev)
2283 {
2284         return (u64)wdev->identifier |
2285                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2286 }
2287
2288 static int nl80211_send_chandef(struct sk_buff *msg,
2289                                 const struct cfg80211_chan_def *chandef)
2290 {
2291         WARN_ON(!cfg80211_chandef_valid(chandef));
2292
2293         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2294                         chandef->chan->center_freq))
2295                 return -ENOBUFS;
2296         switch (chandef->width) {
2297         case NL80211_CHAN_WIDTH_20_NOHT:
2298         case NL80211_CHAN_WIDTH_20:
2299         case NL80211_CHAN_WIDTH_40:
2300                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2301                                 cfg80211_get_chandef_type(chandef)))
2302                         return -ENOBUFS;
2303                 break;
2304         default:
2305                 break;
2306         }
2307         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2308                 return -ENOBUFS;
2309         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2310                 return -ENOBUFS;
2311         if (chandef->center_freq2 &&
2312             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2313                 return -ENOBUFS;
2314         return 0;
2315 }
2316
2317 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2318                               struct cfg80211_registered_device *rdev,
2319                               struct wireless_dev *wdev)
2320 {
2321         struct net_device *dev = wdev->netdev;
2322         void *hdr;
2323
2324         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2325         if (!hdr)
2326                 return -1;
2327
2328         if (dev &&
2329             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2330              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2331                 goto nla_put_failure;
2332
2333         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2334             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2335             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2336             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2337             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2338                         rdev->devlist_generation ^
2339                         (cfg80211_rdev_list_generation << 2)))
2340                 goto nla_put_failure;
2341
2342         if (rdev->ops->get_channel) {
2343                 int ret;
2344                 struct cfg80211_chan_def chandef;
2345
2346                 ret = rdev_get_channel(rdev, wdev, &chandef);
2347                 if (ret == 0) {
2348                         if (nl80211_send_chandef(msg, &chandef))
2349                                 goto nla_put_failure;
2350                 }
2351         }
2352
2353         if (wdev->ssid_len) {
2354                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2355                         goto nla_put_failure;
2356         }
2357
2358         return genlmsg_end(msg, hdr);
2359
2360  nla_put_failure:
2361         genlmsg_cancel(msg, hdr);
2362         return -EMSGSIZE;
2363 }
2364
2365 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2366 {
2367         int wp_idx = 0;
2368         int if_idx = 0;
2369         int wp_start = cb->args[0];
2370         int if_start = cb->args[1];
2371         struct cfg80211_registered_device *rdev;
2372         struct wireless_dev *wdev;
2373
2374         rtnl_lock();
2375         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2376                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2377                         continue;
2378                 if (wp_idx < wp_start) {
2379                         wp_idx++;
2380                         continue;
2381                 }
2382                 if_idx = 0;
2383
2384                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2385                         if (if_idx < if_start) {
2386                                 if_idx++;
2387                                 continue;
2388                         }
2389                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2390                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2391                                                rdev, wdev) < 0) {
2392                                 goto out;
2393                         }
2394                         if_idx++;
2395                 }
2396
2397                 wp_idx++;
2398         }
2399  out:
2400         rtnl_unlock();
2401
2402         cb->args[0] = wp_idx;
2403         cb->args[1] = if_idx;
2404
2405         return skb->len;
2406 }
2407
2408 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2409 {
2410         struct sk_buff *msg;
2411         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2412         struct wireless_dev *wdev = info->user_ptr[1];
2413
2414         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2415         if (!msg)
2416                 return -ENOMEM;
2417
2418         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2419                                rdev, wdev) < 0) {
2420                 nlmsg_free(msg);
2421                 return -ENOBUFS;
2422         }
2423
2424         return genlmsg_reply(msg, info);
2425 }
2426
2427 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2428         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2429         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2430         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2431         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2432         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2433         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2434 };
2435
2436 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2437 {
2438         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2439         int flag;
2440
2441         *mntrflags = 0;
2442
2443         if (!nla)
2444                 return -EINVAL;
2445
2446         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2447                              nla, mntr_flags_policy))
2448                 return -EINVAL;
2449
2450         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2451                 if (flags[flag])
2452                         *mntrflags |= (1<<flag);
2453
2454         return 0;
2455 }
2456
2457 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2458                                struct net_device *netdev, u8 use_4addr,
2459                                enum nl80211_iftype iftype)
2460 {
2461         if (!use_4addr) {
2462                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2463                         return -EBUSY;
2464                 return 0;
2465         }
2466
2467         switch (iftype) {
2468         case NL80211_IFTYPE_AP_VLAN:
2469                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2470                         return 0;
2471                 break;
2472         case NL80211_IFTYPE_STATION:
2473                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2474                         return 0;
2475                 break;
2476         default:
2477                 break;
2478         }
2479
2480         return -EOPNOTSUPP;
2481 }
2482
2483 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2484 {
2485         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2486         struct vif_params params;
2487         int err;
2488         enum nl80211_iftype otype, ntype;
2489         struct net_device *dev = info->user_ptr[1];
2490         u32 _flags, *flags = NULL;
2491         bool change = false;
2492
2493         memset(&params, 0, sizeof(params));
2494
2495         otype = ntype = dev->ieee80211_ptr->iftype;
2496
2497         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2498                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2499                 if (otype != ntype)
2500                         change = true;
2501                 if (ntype > NL80211_IFTYPE_MAX)
2502                         return -EINVAL;
2503         }
2504
2505         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2506                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2507
2508                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2509                         return -EINVAL;
2510                 if (netif_running(dev))
2511                         return -EBUSY;
2512
2513                 wdev_lock(wdev);
2514                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2515                              IEEE80211_MAX_MESH_ID_LEN);
2516                 wdev->mesh_id_up_len =
2517                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2518                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2519                        wdev->mesh_id_up_len);
2520                 wdev_unlock(wdev);
2521         }
2522
2523         if (info->attrs[NL80211_ATTR_4ADDR]) {
2524                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2525                 change = true;
2526                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2527                 if (err)
2528                         return err;
2529         } else {
2530                 params.use_4addr = -1;
2531         }
2532
2533         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2534                 if (ntype != NL80211_IFTYPE_MONITOR)
2535                         return -EINVAL;
2536                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2537                                           &_flags);
2538                 if (err)
2539                         return err;
2540
2541                 flags = &_flags;
2542                 change = true;
2543         }
2544
2545         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2546             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2547                 return -EOPNOTSUPP;
2548
2549         if (change)
2550                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2551         else
2552                 err = 0;
2553
2554         if (!err && params.use_4addr != -1)
2555                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2556
2557         return err;
2558 }
2559
2560 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2561 {
2562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2563         struct vif_params params;
2564         struct wireless_dev *wdev;
2565         struct sk_buff *msg;
2566         int err;
2567         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2568         u32 flags;
2569
2570         /* to avoid failing a new interface creation due to pending removal */
2571         cfg80211_destroy_ifaces(rdev);
2572
2573         memset(&params, 0, sizeof(params));
2574
2575         if (!info->attrs[NL80211_ATTR_IFNAME])
2576                 return -EINVAL;
2577
2578         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2579                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2580                 if (type > NL80211_IFTYPE_MAX)
2581                         return -EINVAL;
2582         }
2583
2584         if (!rdev->ops->add_virtual_intf ||
2585             !(rdev->wiphy.interface_modes & (1 << type)))
2586                 return -EOPNOTSUPP;
2587
2588         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2589                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2590                            ETH_ALEN);
2591                 if (!is_valid_ether_addr(params.macaddr))
2592                         return -EADDRNOTAVAIL;
2593         }
2594
2595         if (info->attrs[NL80211_ATTR_4ADDR]) {
2596                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2597                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2598                 if (err)
2599                         return err;
2600         }
2601
2602         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2603         if (!msg)
2604                 return -ENOMEM;
2605
2606         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2607                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2608                                   &flags);
2609
2610         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2611             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2612                 return -EOPNOTSUPP;
2613
2614         wdev = rdev_add_virtual_intf(rdev,
2615                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2616                                 type, err ? NULL : &flags, &params);
2617         if (IS_ERR(wdev)) {
2618                 nlmsg_free(msg);
2619                 return PTR_ERR(wdev);
2620         }
2621
2622         if (info->attrs[NL80211_ATTR_IFACE_SOCKET_OWNER])
2623                 wdev->owner_nlportid = info->snd_portid;
2624
2625         switch (type) {
2626         case NL80211_IFTYPE_MESH_POINT:
2627                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2628                         break;
2629                 wdev_lock(wdev);
2630                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2631                              IEEE80211_MAX_MESH_ID_LEN);
2632                 wdev->mesh_id_up_len =
2633                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2634                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2635                        wdev->mesh_id_up_len);
2636                 wdev_unlock(wdev);
2637                 break;
2638         case NL80211_IFTYPE_P2P_DEVICE:
2639                 /*
2640                  * P2P Device doesn't have a netdev, so doesn't go
2641                  * through the netdev notifier and must be added here
2642                  */
2643                 mutex_init(&wdev->mtx);
2644                 INIT_LIST_HEAD(&wdev->event_list);
2645                 spin_lock_init(&wdev->event_lock);
2646                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2647                 spin_lock_init(&wdev->mgmt_registrations_lock);
2648
2649                 wdev->identifier = ++rdev->wdev_id;
2650                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2651                 rdev->devlist_generation++;
2652                 break;
2653         default:
2654                 break;
2655         }
2656
2657         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2658                                rdev, wdev) < 0) {
2659                 nlmsg_free(msg);
2660                 return -ENOBUFS;
2661         }
2662
2663         return genlmsg_reply(msg, info);
2664 }
2665
2666 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2667 {
2668         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2669         struct wireless_dev *wdev = info->user_ptr[1];
2670
2671         if (!rdev->ops->del_virtual_intf)
2672                 return -EOPNOTSUPP;
2673
2674         /*
2675          * If we remove a wireless device without a netdev then clear
2676          * user_ptr[1] so that nl80211_post_doit won't dereference it
2677          * to check if it needs to do dev_put(). Otherwise it crashes
2678          * since the wdev has been freed, unlike with a netdev where
2679          * we need the dev_put() for the netdev to really be freed.
2680          */
2681         if (!wdev->netdev)
2682                 info->user_ptr[1] = NULL;
2683
2684         return rdev_del_virtual_intf(rdev, wdev);
2685 }
2686
2687 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2688 {
2689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2690         struct net_device *dev = info->user_ptr[1];
2691         u16 noack_map;
2692
2693         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2694                 return -EINVAL;
2695
2696         if (!rdev->ops->set_noack_map)
2697                 return -EOPNOTSUPP;
2698
2699         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2700
2701         return rdev_set_noack_map(rdev, dev, noack_map);
2702 }
2703
2704 struct get_key_cookie {
2705         struct sk_buff *msg;
2706         int error;
2707         int idx;
2708 };
2709
2710 static void get_key_callback(void *c, struct key_params *params)
2711 {
2712         struct nlattr *key;
2713         struct get_key_cookie *cookie = c;
2714
2715         if ((params->key &&
2716              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2717                      params->key_len, params->key)) ||
2718             (params->seq &&
2719              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2720                      params->seq_len, params->seq)) ||
2721             (params->cipher &&
2722              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2723                          params->cipher)))
2724                 goto nla_put_failure;
2725
2726         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2727         if (!key)
2728                 goto nla_put_failure;
2729
2730         if ((params->key &&
2731              nla_put(cookie->msg, NL80211_KEY_DATA,
2732                      params->key_len, params->key)) ||
2733             (params->seq &&
2734              nla_put(cookie->msg, NL80211_KEY_SEQ,
2735                      params->seq_len, params->seq)) ||
2736             (params->cipher &&
2737              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2738                          params->cipher)))
2739                 goto nla_put_failure;
2740
2741         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2742                 goto nla_put_failure;
2743
2744         nla_nest_end(cookie->msg, key);
2745
2746         return;
2747  nla_put_failure:
2748         cookie->error = 1;
2749 }
2750
2751 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2752 {
2753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2754         int err;
2755         struct net_device *dev = info->user_ptr[1];
2756         u8 key_idx = 0;
2757         const u8 *mac_addr = NULL;
2758         bool pairwise;
2759         struct get_key_cookie cookie = {
2760                 .error = 0,
2761         };
2762         void *hdr;
2763         struct sk_buff *msg;
2764
2765         if (info->attrs[NL80211_ATTR_KEY_IDX])
2766                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2767
2768         if (key_idx > 5)
2769                 return -EINVAL;
2770
2771         if (info->attrs[NL80211_ATTR_MAC])
2772                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2773
2774         pairwise = !!mac_addr;
2775         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2776                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2777                 if (kt >= NUM_NL80211_KEYTYPES)
2778                         return -EINVAL;
2779                 if (kt != NL80211_KEYTYPE_GROUP &&
2780                     kt != NL80211_KEYTYPE_PAIRWISE)
2781                         return -EINVAL;
2782                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2783         }
2784
2785         if (!rdev->ops->get_key)
2786                 return -EOPNOTSUPP;
2787
2788         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2789         if (!msg)
2790                 return -ENOMEM;
2791
2792         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2793                              NL80211_CMD_NEW_KEY);
2794         if (!hdr)
2795                 goto nla_put_failure;
2796
2797         cookie.msg = msg;
2798         cookie.idx = key_idx;
2799
2800         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2801             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2802                 goto nla_put_failure;
2803         if (mac_addr &&
2804             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2805                 goto nla_put_failure;
2806
2807         if (pairwise && mac_addr &&
2808             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2809                 return -ENOENT;
2810
2811         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2812                            get_key_callback);
2813
2814         if (err)
2815                 goto free_msg;
2816
2817         if (cookie.error)
2818                 goto nla_put_failure;
2819
2820         genlmsg_end(msg, hdr);
2821         return genlmsg_reply(msg, info);
2822
2823  nla_put_failure:
2824         err = -ENOBUFS;
2825  free_msg:
2826         nlmsg_free(msg);
2827         return err;
2828 }
2829
2830 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2831 {
2832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2833         struct key_parse key;
2834         int err;
2835         struct net_device *dev = info->user_ptr[1];
2836
2837         err = nl80211_parse_key(info, &key);
2838         if (err)
2839                 return err;
2840
2841         if (key.idx < 0)
2842                 return -EINVAL;
2843
2844         /* only support setting default key */
2845         if (!key.def && !key.defmgmt)
2846                 return -EINVAL;
2847
2848         wdev_lock(dev->ieee80211_ptr);
2849
2850         if (key.def) {
2851                 if (!rdev->ops->set_default_key) {
2852                         err = -EOPNOTSUPP;
2853                         goto out;
2854                 }
2855
2856                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2857                 if (err)
2858                         goto out;
2859
2860                 err = rdev_set_default_key(rdev, dev, key.idx,
2861                                                  key.def_uni, key.def_multi);
2862
2863                 if (err)
2864                         goto out;
2865
2866 #ifdef CONFIG_CFG80211_WEXT
2867                 dev->ieee80211_ptr->wext.default_key = key.idx;
2868 #endif
2869         } else {
2870                 if (key.def_uni || !key.def_multi) {
2871                         err = -EINVAL;
2872                         goto out;
2873                 }
2874
2875                 if (!rdev->ops->set_default_mgmt_key) {
2876                         err = -EOPNOTSUPP;
2877                         goto out;
2878                 }
2879
2880                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2881                 if (err)
2882                         goto out;
2883
2884                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2885                 if (err)
2886                         goto out;
2887
2888 #ifdef CONFIG_CFG80211_WEXT
2889                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2890 #endif
2891         }
2892
2893  out:
2894         wdev_unlock(dev->ieee80211_ptr);
2895
2896         return err;
2897 }
2898
2899 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2900 {
2901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2902         int err;
2903         struct net_device *dev = info->user_ptr[1];
2904         struct key_parse key;
2905         const u8 *mac_addr = NULL;
2906
2907         err = nl80211_parse_key(info, &key);
2908         if (err)
2909                 return err;
2910
2911         if (!key.p.key)
2912                 return -EINVAL;
2913
2914         if (info->attrs[NL80211_ATTR_MAC])
2915                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2916
2917         if (key.type == -1) {
2918                 if (mac_addr)
2919                         key.type = NL80211_KEYTYPE_PAIRWISE;
2920                 else
2921                         key.type = NL80211_KEYTYPE_GROUP;
2922         }
2923
2924         /* for now */
2925         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2926             key.type != NL80211_KEYTYPE_GROUP)
2927                 return -EINVAL;
2928
2929         if (!rdev->ops->add_key)
2930                 return -EOPNOTSUPP;
2931
2932         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2933                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2934                                            mac_addr))
2935                 return -EINVAL;
2936
2937         wdev_lock(dev->ieee80211_ptr);
2938         err = nl80211_key_allowed(dev->ieee80211_ptr);
2939         if (!err)
2940                 err = rdev_add_key(rdev, dev, key.idx,
2941                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2942                                     mac_addr, &key.p);
2943         wdev_unlock(dev->ieee80211_ptr);
2944
2945         return err;
2946 }
2947
2948 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2949 {
2950         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2951         int err;
2952         struct net_device *dev = info->user_ptr[1];
2953         u8 *mac_addr = NULL;
2954         struct key_parse key;
2955
2956         err = nl80211_parse_key(info, &key);
2957         if (err)
2958                 return err;
2959
2960         if (info->attrs[NL80211_ATTR_MAC])
2961                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2962
2963         if (key.type == -1) {
2964                 if (mac_addr)
2965                         key.type = NL80211_KEYTYPE_PAIRWISE;
2966                 else
2967                         key.type = NL80211_KEYTYPE_GROUP;
2968         }
2969
2970         /* for now */
2971         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2972             key.type != NL80211_KEYTYPE_GROUP)
2973                 return -EINVAL;
2974
2975         if (!rdev->ops->del_key)
2976                 return -EOPNOTSUPP;
2977
2978         wdev_lock(dev->ieee80211_ptr);
2979         err = nl80211_key_allowed(dev->ieee80211_ptr);
2980
2981         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2982             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2983                 err = -ENOENT;
2984
2985         if (!err)
2986                 err = rdev_del_key(rdev, dev, key.idx,
2987                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2988                                    mac_addr);
2989
2990 #ifdef CONFIG_CFG80211_WEXT
2991         if (!err) {
2992                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2993                         dev->ieee80211_ptr->wext.default_key = -1;
2994                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2995                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2996         }
2997 #endif
2998         wdev_unlock(dev->ieee80211_ptr);
2999
3000         return err;
3001 }
3002
3003 /* This function returns an error or the number of nested attributes */
3004 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3005 {
3006         struct nlattr *attr;
3007         int n_entries = 0, tmp;
3008
3009         nla_for_each_nested(attr, nl_attr, tmp) {
3010                 if (nla_len(attr) != ETH_ALEN)
3011                         return -EINVAL;
3012
3013                 n_entries++;
3014         }
3015
3016         return n_entries;
3017 }
3018
3019 /*
3020  * This function parses ACL information and allocates memory for ACL data.
3021  * On successful return, the calling function is responsible to free the
3022  * ACL buffer returned by this function.
3023  */
3024 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3025                                                 struct genl_info *info)
3026 {
3027         enum nl80211_acl_policy acl_policy;
3028         struct nlattr *attr;
3029         struct cfg80211_acl_data *acl;
3030         int i = 0, n_entries, tmp;
3031
3032         if (!wiphy->max_acl_mac_addrs)
3033                 return ERR_PTR(-EOPNOTSUPP);
3034
3035         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3036                 return ERR_PTR(-EINVAL);
3037
3038         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3039         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3040             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3041                 return ERR_PTR(-EINVAL);
3042
3043         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3044                 return ERR_PTR(-EINVAL);
3045
3046         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3047         if (n_entries < 0)
3048                 return ERR_PTR(n_entries);
3049
3050         if (n_entries > wiphy->max_acl_mac_addrs)
3051                 return ERR_PTR(-ENOTSUPP);
3052
3053         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3054                       GFP_KERNEL);
3055         if (!acl)
3056                 return ERR_PTR(-ENOMEM);
3057
3058         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3059                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3060                 i++;
3061         }
3062
3063         acl->n_acl_entries = n_entries;
3064         acl->acl_policy = acl_policy;
3065
3066         return acl;
3067 }
3068
3069 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3070 {
3071         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3072         struct net_device *dev = info->user_ptr[1];
3073         struct cfg80211_acl_data *acl;
3074         int err;
3075
3076         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3077             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3078                 return -EOPNOTSUPP;
3079
3080         if (!dev->ieee80211_ptr->beacon_interval)
3081                 return -EINVAL;
3082
3083         acl = parse_acl_data(&rdev->wiphy, info);
3084         if (IS_ERR(acl))
3085                 return PTR_ERR(acl);
3086
3087         err = rdev_set_mac_acl(rdev, dev, acl);
3088
3089         kfree(acl);
3090
3091         return err;
3092 }
3093
3094 static int nl80211_parse_beacon(struct nlattr *attrs[],
3095                                 struct cfg80211_beacon_data *bcn)
3096 {
3097         bool haveinfo = false;
3098
3099         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3100             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3101             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3102             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3103                 return -EINVAL;
3104
3105         memset(bcn, 0, sizeof(*bcn));
3106
3107         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3108                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3109                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3110                 if (!bcn->head_len)
3111                         return -EINVAL;
3112                 haveinfo = true;
3113         }
3114
3115         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3116                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3117                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3118                 haveinfo = true;
3119         }
3120
3121         if (!haveinfo)
3122                 return -EINVAL;
3123
3124         if (attrs[NL80211_ATTR_IE]) {
3125                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3126                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3127         }
3128
3129         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3130                 bcn->proberesp_ies =
3131                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3132                 bcn->proberesp_ies_len =
3133                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3134         }
3135
3136         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3137                 bcn->assocresp_ies =
3138                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3139                 bcn->assocresp_ies_len =
3140                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3141         }
3142
3143         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3144                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3145                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3146         }
3147
3148         return 0;
3149 }
3150
3151 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3152                                    struct cfg80211_ap_settings *params)
3153 {
3154         struct wireless_dev *wdev;
3155         bool ret = false;
3156
3157         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3158                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3159                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3160                         continue;
3161
3162                 if (!wdev->preset_chandef.chan)
3163                         continue;
3164
3165                 params->chandef = wdev->preset_chandef;
3166                 ret = true;
3167                 break;
3168         }
3169
3170         return ret;
3171 }
3172
3173 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3174                                     enum nl80211_auth_type auth_type,
3175                                     enum nl80211_commands cmd)
3176 {
3177         if (auth_type > NL80211_AUTHTYPE_MAX)
3178                 return false;
3179
3180         switch (cmd) {
3181         case NL80211_CMD_AUTHENTICATE:
3182                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3183                     auth_type == NL80211_AUTHTYPE_SAE)
3184                         return false;
3185                 return true;
3186         case NL80211_CMD_CONNECT:
3187         case NL80211_CMD_START_AP:
3188                 /* SAE not supported yet */
3189                 if (auth_type == NL80211_AUTHTYPE_SAE)
3190                         return false;
3191                 return true;
3192         default:
3193                 return false;
3194         }
3195 }
3196
3197 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3198 {
3199         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3200         struct net_device *dev = info->user_ptr[1];
3201         struct wireless_dev *wdev = dev->ieee80211_ptr;
3202         struct cfg80211_ap_settings params;
3203         int err;
3204
3205         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3206             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3207                 return -EOPNOTSUPP;
3208
3209         if (!rdev->ops->start_ap)
3210                 return -EOPNOTSUPP;
3211
3212         if (wdev->beacon_interval)
3213                 return -EALREADY;
3214
3215         memset(&params, 0, sizeof(params));
3216
3217         /* these are required for START_AP */
3218         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3219             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3220             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3221                 return -EINVAL;
3222
3223         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3224         if (err)
3225                 return err;
3226
3227         params.beacon_interval =
3228                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3229         params.dtim_period =
3230                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3231
3232         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3233         if (err)
3234                 return err;
3235
3236         /*
3237          * In theory, some of these attributes should be required here
3238          * but since they were not used when the command was originally
3239          * added, keep them optional for old user space programs to let
3240          * them continue to work with drivers that do not need the
3241          * additional information -- drivers must check!
3242          */
3243         if (info->attrs[NL80211_ATTR_SSID]) {
3244                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3245                 params.ssid_len =
3246                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3247                 if (params.ssid_len == 0 ||
3248                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3249                         return -EINVAL;
3250         }
3251
3252         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3253                 params.hidden_ssid = nla_get_u32(
3254                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3255                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3256                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3257                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3258                         return -EINVAL;
3259         }
3260
3261         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3262
3263         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3264                 params.auth_type = nla_get_u32(
3265                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3266                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3267                                              NL80211_CMD_START_AP))
3268                         return -EINVAL;
3269         } else
3270                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3271
3272         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3273                                       NL80211_MAX_NR_CIPHER_SUITES);
3274         if (err)
3275                 return err;
3276
3277         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3278                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3279                         return -EOPNOTSUPP;
3280                 params.inactivity_timeout = nla_get_u16(
3281                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3282         }
3283
3284         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3285                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3286                         return -EINVAL;
3287                 params.p2p_ctwindow =
3288                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3289                 if (params.p2p_ctwindow > 127)
3290                         return -EINVAL;
3291                 if (params.p2p_ctwindow != 0 &&
3292                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3293                         return -EINVAL;
3294         }
3295
3296         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3297                 u8 tmp;
3298
3299                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3300                         return -EINVAL;
3301                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3302                 if (tmp > 1)
3303                         return -EINVAL;
3304                 params.p2p_opp_ps = tmp;
3305                 if (params.p2p_opp_ps != 0 &&
3306                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3307                         return -EINVAL;
3308         }
3309
3310         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3311                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3312                 if (err)
3313                         return err;
3314         } else if (wdev->preset_chandef.chan) {
3315                 params.chandef = wdev->preset_chandef;
3316         } else if (!nl80211_get_ap_channel(rdev, &params))
3317                 return -EINVAL;
3318
3319         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
3320                                      wdev->iftype))
3321                 return -EINVAL;
3322
3323         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3324                 params.acl = parse_acl_data(&rdev->wiphy, info);
3325                 if (IS_ERR(params.acl))
3326                         return PTR_ERR(params.acl);
3327         }
3328
3329         wdev_lock(wdev);
3330         err = rdev_start_ap(rdev, dev, &params);
3331         if (!err) {
3332                 wdev->preset_chandef = params.chandef;
3333                 wdev->beacon_interval = params.beacon_interval;
3334                 wdev->chandef = params.chandef;
3335                 wdev->ssid_len = params.ssid_len;
3336                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3337         }
3338         wdev_unlock(wdev);
3339
3340         kfree(params.acl);
3341
3342         return err;
3343 }
3344
3345 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3346 {
3347         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3348         struct net_device *dev = info->user_ptr[1];
3349         struct wireless_dev *wdev = dev->ieee80211_ptr;
3350         struct cfg80211_beacon_data params;
3351         int err;
3352
3353         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3354             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3355                 return -EOPNOTSUPP;
3356
3357         if (!rdev->ops->change_beacon)
3358                 return -EOPNOTSUPP;
3359
3360         if (!wdev->beacon_interval)
3361                 return -EINVAL;
3362
3363         err = nl80211_parse_beacon(info->attrs, &params);
3364         if (err)
3365                 return err;
3366
3367         wdev_lock(wdev);
3368         err = rdev_change_beacon(rdev, dev, &params);
3369         wdev_unlock(wdev);
3370
3371         return err;
3372 }
3373
3374 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3375 {
3376         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3377         struct net_device *dev = info->user_ptr[1];
3378
3379         return cfg80211_stop_ap(rdev, dev, false);
3380 }
3381
3382 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3383         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3384         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3385         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3386         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3387         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3388         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3389 };
3390
3391 static int parse_station_flags(struct genl_info *info,
3392                                enum nl80211_iftype iftype,
3393                                struct station_parameters *params)
3394 {
3395         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3396         struct nlattr *nla;
3397         int flag;
3398
3399         /*
3400          * Try parsing the new attribute first so userspace
3401          * can specify both for older kernels.
3402          */
3403         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3404         if (nla) {
3405                 struct nl80211_sta_flag_update *sta_flags;
3406
3407                 sta_flags = nla_data(nla);
3408                 params->sta_flags_mask = sta_flags->mask;
3409                 params->sta_flags_set = sta_flags->set;
3410                 params->sta_flags_set &= params->sta_flags_mask;
3411                 if ((params->sta_flags_mask |
3412                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3413                         return -EINVAL;
3414                 return 0;
3415         }
3416
3417         /* if present, parse the old attribute */
3418
3419         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3420         if (!nla)
3421                 return 0;
3422
3423         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3424                              nla, sta_flags_policy))
3425                 return -EINVAL;
3426
3427         /*
3428          * Only allow certain flags for interface types so that
3429          * other attributes are silently ignored. Remember that
3430          * this is backward compatibility code with old userspace
3431          * and shouldn't be hit in other cases anyway.
3432          */
3433         switch (iftype) {
3434         case NL80211_IFTYPE_AP:
3435         case NL80211_IFTYPE_AP_VLAN:
3436         case NL80211_IFTYPE_P2P_GO:
3437                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3438                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3439                                          BIT(NL80211_STA_FLAG_WME) |
3440                                          BIT(NL80211_STA_FLAG_MFP);
3441                 break;
3442         case NL80211_IFTYPE_P2P_CLIENT:
3443         case NL80211_IFTYPE_STATION:
3444                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3445                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3446                 break;
3447         case NL80211_IFTYPE_MESH_POINT:
3448                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3449                                          BIT(NL80211_STA_FLAG_MFP) |
3450                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3451         default:
3452                 return -EINVAL;
3453         }
3454
3455         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3456                 if (flags[flag]) {
3457                         params->sta_flags_set |= (1<<flag);
3458
3459                         /* no longer support new API additions in old API */
3460                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3461                                 return -EINVAL;
3462                 }
3463         }
3464
3465         return 0;
3466 }
3467
3468 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3469                                  int attr)
3470 {
3471         struct nlattr *rate;
3472         u32 bitrate;
3473         u16 bitrate_compat;
3474
3475         rate = nla_nest_start(msg, attr);
3476         if (!rate)
3477                 return false;
3478
3479         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3480         bitrate = cfg80211_calculate_bitrate(info);
3481         /* report 16-bit bitrate only if we can */
3482         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3483         if (bitrate > 0 &&
3484             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3485                 return false;
3486         if (bitrate_compat > 0 &&
3487             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3488                 return false;
3489
3490         if (info->flags & RATE_INFO_FLAGS_MCS) {
3491                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3492                         return false;
3493                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3494                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3495                         return false;
3496                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3497                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3498                         return false;
3499         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3500                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3501                         return false;
3502                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3503                         return false;
3504                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3505                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3506                         return false;
3507                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3508                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3509                         return false;
3510                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3511                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3512                         return false;
3513                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3514                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3515                         return false;
3516                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3517                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3518                         return false;
3519         }
3520
3521         nla_nest_end(msg, rate);
3522         return true;
3523 }
3524
3525 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3526                                int id)
3527 {
3528         void *attr;
3529         int i = 0;
3530
3531         if (!mask)
3532                 return true;
3533
3534         attr = nla_nest_start(msg, id);
3535         if (!attr)
3536                 return false;
3537
3538         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3539                 if (!(mask & BIT(i)))
3540                         continue;
3541
3542                 if (nla_put_u8(msg, i, signal[i]))
3543                         return false;
3544         }
3545
3546         nla_nest_end(msg, attr);
3547
3548         return true;
3549 }
3550
3551 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3552                                 int flags,
3553                                 struct cfg80211_registered_device *rdev,
3554                                 struct net_device *dev,
3555                                 const u8 *mac_addr, struct station_info *sinfo)
3556 {
3557         void *hdr;
3558         struct nlattr *sinfoattr, *bss_param;
3559
3560         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3561         if (!hdr)
3562                 return -1;
3563
3564         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3565             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3566             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3567                 goto nla_put_failure;
3568
3569         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3570         if (!sinfoattr)
3571                 goto nla_put_failure;
3572         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3573             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3574                         sinfo->connected_time))
3575                 goto nla_put_failure;
3576         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3577             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3578                         sinfo->inactive_time))
3579                 goto nla_put_failure;
3580         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3581                               STATION_INFO_RX_BYTES64)) &&
3582             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3583                         (u32)sinfo->rx_bytes))
3584                 goto nla_put_failure;
3585         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3586                               STATION_INFO_TX_BYTES64)) &&
3587             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3588                         (u32)sinfo->tx_bytes))
3589                 goto nla_put_failure;
3590         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3591             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3592                         sinfo->rx_bytes))
3593                 goto nla_put_failure;
3594         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3595             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3596                         sinfo->tx_bytes))
3597                 goto nla_put_failure;
3598         if ((sinfo->filled & STATION_INFO_LLID) &&
3599             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3600                 goto nla_put_failure;
3601         if ((sinfo->filled & STATION_INFO_PLID) &&
3602             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3603                 goto nla_put_failure;
3604         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3605             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3606                        sinfo->plink_state))
3607                 goto nla_put_failure;
3608         switch (rdev->wiphy.signal_type) {
3609         case CFG80211_SIGNAL_TYPE_MBM:
3610                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3611                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3612                                sinfo->signal))
3613                         goto nla_put_failure;
3614                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3615                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3616                                sinfo->signal_avg))
3617                         goto nla_put_failure;
3618                 break;
3619         default:
3620                 break;
3621         }
3622         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3623                 if (!nl80211_put_signal(msg, sinfo->chains,
3624                                         sinfo->chain_signal,
3625                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3626                         goto nla_put_failure;
3627         }
3628         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3629                 if (!nl80211_put_signal(msg, sinfo->chains,
3630                                         sinfo->chain_signal_avg,
3631                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3632                         goto nla_put_failure;
3633         }
3634         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3635                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3636                                           NL80211_STA_INFO_TX_BITRATE))
3637                         goto nla_put_failure;
3638         }
3639         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3640                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3641                                           NL80211_STA_INFO_RX_BITRATE))
3642                         goto nla_put_failure;
3643         }
3644         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3645             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3646                         sinfo->rx_packets))
3647                 goto nla_put_failure;
3648         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3649             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3650                         sinfo->tx_packets))
3651                 goto nla_put_failure;
3652         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3653             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3654                         sinfo->tx_retries))
3655                 goto nla_put_failure;
3656         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3657             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3658                         sinfo->tx_failed))
3659                 goto nla_put_failure;
3660         if ((sinfo->filled & STATION_INFO_EXPECTED_THROUGHPUT) &&
3661             nla_put_u32(msg, NL80211_STA_INFO_EXPECTED_THROUGHPUT,
3662                         sinfo->expected_throughput))
3663                 goto nla_put_failure;
3664         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3665             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3666                         sinfo->beacon_loss_count))
3667                 goto nla_put_failure;
3668         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3669             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3670                         sinfo->local_pm))
3671                 goto nla_put_failure;
3672         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3673             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3674                         sinfo->peer_pm))
3675                 goto nla_put_failure;
3676         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3677             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3678                         sinfo->nonpeer_pm))
3679                 goto nla_put_failure;
3680         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3681                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3682                 if (!bss_param)
3683                         goto nla_put_failure;
3684
3685                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3686                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3687                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3688                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3689                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3690                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3691                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3692                                sinfo->bss_param.dtim_period) ||
3693                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3694                                 sinfo->bss_param.beacon_interval))
3695                         goto nla_put_failure;
3696
3697                 nla_nest_end(msg, bss_param);
3698         }
3699         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3700             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3701                     sizeof(struct nl80211_sta_flag_update),
3702                     &sinfo->sta_flags))
3703                 goto nla_put_failure;
3704         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3705                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3706                             sinfo->t_offset))
3707                 goto nla_put_failure;
3708         nla_nest_end(msg, sinfoattr);
3709
3710         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3711             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3712                     sinfo->assoc_req_ies))
3713                 goto nla_put_failure;
3714
3715         return genlmsg_end(msg, hdr);
3716
3717  nla_put_failure:
3718         genlmsg_cancel(msg, hdr);
3719         return -EMSGSIZE;
3720 }
3721
3722 static int nl80211_dump_station(struct sk_buff *skb,
3723                                 struct netlink_callback *cb)
3724 {
3725         struct station_info sinfo;
3726         struct cfg80211_registered_device *rdev;
3727         struct wireless_dev *wdev;
3728         u8 mac_addr[ETH_ALEN];
3729         int sta_idx = cb->args[2];
3730         int err;
3731
3732         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3733         if (err)
3734                 return err;
3735
3736         if (!wdev->netdev) {
3737                 err = -EINVAL;
3738                 goto out_err;
3739         }
3740
3741         if (!rdev->ops->dump_station) {
3742                 err = -EOPNOTSUPP;
3743                 goto out_err;
3744         }
3745
3746         while (1) {
3747                 memset(&sinfo, 0, sizeof(sinfo));
3748                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3749                                         mac_addr, &sinfo);
3750                 if (err == -ENOENT)
3751                         break;
3752                 if (err)
3753                         goto out_err;
3754
3755                 if (nl80211_send_station(skb,
3756                                 NETLINK_CB(cb->skb).portid,
3757                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3758                                 rdev, wdev->netdev, mac_addr,
3759                                 &sinfo) < 0)
3760                         goto out;
3761
3762                 sta_idx++;
3763         }
3764
3765
3766  out:
3767         cb->args[2] = sta_idx;
3768         err = skb->len;
3769  out_err:
3770         nl80211_finish_wdev_dump(rdev);
3771
3772         return err;
3773 }
3774
3775 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3776 {
3777         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3778         struct net_device *dev = info->user_ptr[1];
3779         struct station_info sinfo;
3780         struct sk_buff *msg;
3781         u8 *mac_addr = NULL;
3782         int err;
3783
3784         memset(&sinfo, 0, sizeof(sinfo));
3785
3786         if (!info->attrs[NL80211_ATTR_MAC])
3787                 return -EINVAL;
3788
3789         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3790
3791         if (!rdev->ops->get_station)
3792                 return -EOPNOTSUPP;
3793
3794         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3795         if (err)
3796                 return err;
3797
3798         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3799         if (!msg)
3800                 return -ENOMEM;
3801
3802         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3803                                  rdev, dev, mac_addr, &sinfo) < 0) {
3804                 nlmsg_free(msg);
3805                 return -ENOBUFS;
3806         }
3807
3808         return genlmsg_reply(msg, info);
3809 }
3810
3811 int cfg80211_check_station_change(struct wiphy *wiphy,
3812                                   struct station_parameters *params,
3813                                   enum cfg80211_station_type statype)
3814 {
3815         if (params->listen_interval != -1)
3816                 return -EINVAL;
3817         if (params->aid &&
3818             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3819                 return -EINVAL;
3820
3821         /* When you run into this, adjust the code below for the new flag */
3822         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3823
3824         switch (statype) {
3825         case CFG80211_STA_MESH_PEER_KERNEL:
3826         case CFG80211_STA_MESH_PEER_USER:
3827                 /*
3828                  * No ignoring the TDLS flag here -- the userspace mesh
3829                  * code doesn't have the bug of including TDLS in the
3830                  * mask everywhere.
3831                  */
3832                 if (params->sta_flags_mask &
3833                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3834                                   BIT(NL80211_STA_FLAG_MFP) |
3835                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3836                         return -EINVAL;
3837                 break;
3838         case CFG80211_STA_TDLS_PEER_SETUP:
3839         case CFG80211_STA_TDLS_PEER_ACTIVE:
3840                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3841                         return -EINVAL;
3842                 /* ignore since it can't change */
3843                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3844                 break;
3845         default:
3846                 /* disallow mesh-specific things */
3847                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3848                         return -EINVAL;
3849                 if (params->local_pm)
3850                         return -EINVAL;
3851                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3852                         return -EINVAL;
3853         }
3854
3855         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3856             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3857                 /* TDLS can't be set, ... */
3858                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3859                         return -EINVAL;
3860                 /*
3861                  * ... but don't bother the driver with it. This works around
3862                  * a hostapd/wpa_supplicant issue -- it always includes the
3863                  * TLDS_PEER flag in the mask even for AP mode.
3864                  */
3865                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3866         }
3867
3868         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3869                 /* reject other things that can't change */
3870                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3871                         return -EINVAL;
3872                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3873                         return -EINVAL;
3874                 if (params->supported_rates)
3875                         return -EINVAL;
3876                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3877                         return -EINVAL;
3878         }
3879
3880         if (statype != CFG80211_STA_AP_CLIENT) {
3881                 if (params->vlan)
3882                         return -EINVAL;
3883         }
3884
3885         switch (statype) {
3886         case CFG80211_STA_AP_MLME_CLIENT:
3887                 /* Use this only for authorizing/unauthorizing a station */
3888                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3889                         return -EOPNOTSUPP;
3890                 break;
3891         case CFG80211_STA_AP_CLIENT:
3892                 /* accept only the listed bits */
3893                 if (params->sta_flags_mask &
3894                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3895                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3896                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3897                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3898                                   BIT(NL80211_STA_FLAG_WME) |
3899                                   BIT(NL80211_STA_FLAG_MFP)))
3900                         return -EINVAL;
3901
3902                 /* but authenticated/associated only if driver handles it */
3903                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3904                     params->sta_flags_mask &
3905                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3906                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3907                         return -EINVAL;
3908                 break;
3909         case CFG80211_STA_IBSS:
3910         case CFG80211_STA_AP_STA:
3911                 /* reject any changes other than AUTHORIZED */
3912                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3913                         return -EINVAL;
3914                 break;
3915         case CFG80211_STA_TDLS_PEER_SETUP:
3916                 /* reject any changes other than AUTHORIZED or WME */
3917                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3918                                                BIT(NL80211_STA_FLAG_WME)))
3919                         return -EINVAL;
3920                 /* force (at least) rates when authorizing */
3921                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3922                     !params->supported_rates)
3923                         return -EINVAL;
3924                 break;
3925         case CFG80211_STA_TDLS_PEER_ACTIVE:
3926                 /* reject any changes */
3927                 return -EINVAL;
3928         case CFG80211_STA_MESH_PEER_KERNEL:
3929                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3930                         return -EINVAL;
3931                 break;
3932         case CFG80211_STA_MESH_PEER_USER:
3933                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3934                         return -EINVAL;
3935                 break;
3936         }
3937
3938         return 0;
3939 }
3940 EXPORT_SYMBOL(cfg80211_check_station_change);
3941
3942 /*
3943  * Get vlan interface making sure it is running and on the right wiphy.
3944  */
3945 static struct net_device *get_vlan(struct genl_info *info,
3946                                    struct cfg80211_registered_device *rdev)
3947 {
3948         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3949         struct net_device *v;
3950         int ret;
3951
3952         if (!vlanattr)
3953                 return NULL;
3954
3955         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3956         if (!v)
3957                 return ERR_PTR(-ENODEV);
3958
3959         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3960                 ret = -EINVAL;
3961                 goto error;
3962         }
3963
3964         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3965             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3966             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3967                 ret = -EINVAL;
3968                 goto error;
3969         }
3970
3971         if (!netif_running(v)) {
3972                 ret = -ENETDOWN;
3973                 goto error;
3974         }
3975
3976         return v;
3977  error:
3978         dev_put(v);
3979         return ERR_PTR(ret);
3980 }
3981
3982 static const struct nla_policy
3983 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
3984         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3985         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3986 };
3987
3988 static int nl80211_parse_sta_wme(struct genl_info *info,
3989                                  struct station_parameters *params)
3990 {
3991         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3992         struct nlattr *nla;
3993         int err;
3994
3995         /* parse WME attributes if present */
3996         if (!info->attrs[NL80211_ATTR_STA_WME])
3997                 return 0;
3998
3999         nla = info->attrs[NL80211_ATTR_STA_WME];
4000         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4001                                nl80211_sta_wme_policy);
4002         if (err)
4003                 return err;
4004
4005         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4006                 params->uapsd_queues = nla_get_u8(
4007                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4008         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4009                 return -EINVAL;
4010
4011         if (tb[NL80211_STA_WME_MAX_SP])
4012                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4013
4014         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4015                 return -EINVAL;
4016
4017         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4018
4019         return 0;
4020 }
4021
4022 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4023                                       struct station_parameters *params)
4024 {
4025         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4026                 params->supported_channels =
4027                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4028                 params->supported_channels_len =
4029                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4030                 /*
4031                  * Need to include at least one (first channel, number of
4032                  * channels) tuple for each subband, and must have proper
4033                  * tuples for the rest of the data as well.
4034                  */
4035                 if (params->supported_channels_len < 2)
4036                         return -EINVAL;
4037                 if (params->supported_channels_len % 2)
4038                         return -EINVAL;
4039         }
4040
4041         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4042                 params->supported_oper_classes =
4043                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4044                 params->supported_oper_classes_len =
4045                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4046                 /*
4047                  * The value of the Length field of the Supported Operating
4048                  * Classes element is between 2 and 253.
4049                  */
4050                 if (params->supported_oper_classes_len < 2 ||
4051                     params->supported_oper_classes_len > 253)
4052                         return -EINVAL;
4053         }
4054         return 0;
4055 }
4056
4057 static int nl80211_set_station_tdls(struct genl_info *info,
4058                                     struct station_parameters *params)
4059 {
4060         int err;
4061         /* Dummy STA entry gets updated once the peer capabilities are known */
4062         if (info->attrs[NL80211_ATTR_PEER_AID])
4063                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4064         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4065                 params->ht_capa =
4066                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4067         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4068                 params->vht_capa =
4069                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4070
4071         err = nl80211_parse_sta_channel_info(info, params);
4072         if (err)
4073                 return err;
4074
4075         return nl80211_parse_sta_wme(info, params);
4076 }
4077
4078 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4079 {
4080         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4081         struct net_device *dev = info->user_ptr[1];
4082         struct station_parameters params;
4083         u8 *mac_addr;
4084         int err;
4085
4086         memset(&params, 0, sizeof(params));
4087
4088         params.listen_interval = -1;
4089
4090         if (!rdev->ops->change_station)
4091                 return -EOPNOTSUPP;
4092
4093         if (info->attrs[NL80211_ATTR_STA_AID])
4094                 return -EINVAL;
4095
4096         if (!info->attrs[NL80211_ATTR_MAC])
4097                 return -EINVAL;
4098
4099         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4100
4101         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4102                 params.supported_rates =
4103                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4104                 params.supported_rates_len =
4105                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4106         }
4107
4108         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4109                 params.capability =
4110                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4111                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4112         }
4113
4114         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4115                 params.ext_capab =
4116                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4117                 params.ext_capab_len =
4118                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4119         }
4120
4121         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4122                 return -EINVAL;
4123
4124         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4125                 return -EINVAL;
4126
4127         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4128                 params.plink_action =
4129                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4130                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4131                         return -EINVAL;
4132         }
4133
4134         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4135                 params.plink_state =
4136                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4137                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4138                         return -EINVAL;
4139                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4140         }
4141
4142         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4143                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4144                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4145
4146                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4147                     pm > NL80211_MESH_POWER_MAX)
4148                         return -EINVAL;
4149
4150                 params.local_pm = pm;
4151         }
4152
4153         /* Include parameters for TDLS peer (will check later) */
4154         err = nl80211_set_station_tdls(info, &params);
4155         if (err)
4156                 return err;
4157
4158         params.vlan = get_vlan(info, rdev);
4159         if (IS_ERR(params.vlan))
4160                 return PTR_ERR(params.vlan);
4161
4162         switch (dev->ieee80211_ptr->iftype) {
4163         case NL80211_IFTYPE_AP:
4164         case NL80211_IFTYPE_AP_VLAN:
4165         case NL80211_IFTYPE_P2P_GO:
4166         case NL80211_IFTYPE_P2P_CLIENT:
4167         case NL80211_IFTYPE_STATION:
4168         case NL80211_IFTYPE_ADHOC:
4169         case NL80211_IFTYPE_MESH_POINT:
4170                 break;
4171         default:
4172                 err = -EOPNOTSUPP;
4173                 goto out_put_vlan;
4174         }
4175
4176         /* driver will call cfg80211_check_station_change() */
4177         err = rdev_change_station(rdev, dev, mac_addr, &params);
4178
4179  out_put_vlan:
4180         if (params.vlan)
4181                 dev_put(params.vlan);
4182
4183         return err;
4184 }
4185
4186 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4187 {
4188         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4189         int err;
4190         struct net_device *dev = info->user_ptr[1];
4191         struct station_parameters params;
4192         u8 *mac_addr = NULL;
4193
4194         memset(&params, 0, sizeof(params));
4195
4196         if (!rdev->ops->add_station)
4197                 return -EOPNOTSUPP;
4198
4199         if (!info->attrs[NL80211_ATTR_MAC])
4200                 return -EINVAL;
4201
4202         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4203                 return -EINVAL;
4204
4205         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4206                 return -EINVAL;
4207
4208         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4209             !info->attrs[NL80211_ATTR_PEER_AID])
4210                 return -EINVAL;
4211
4212         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4213         params.supported_rates =
4214                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4215         params.supported_rates_len =
4216                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4217         params.listen_interval =
4218                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4219
4220         if (info->attrs[NL80211_ATTR_PEER_AID])
4221                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4222         else
4223                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4224         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4225                 return -EINVAL;
4226
4227         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4228                 params.capability =
4229                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4230                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4231         }
4232
4233         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4234                 params.ext_capab =
4235                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4236                 params.ext_capab_len =
4237                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4238         }
4239
4240         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4241                 params.ht_capa =
4242                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4243
4244         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4245                 params.vht_capa =
4246                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4247
4248         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4249                 params.opmode_notif_used = true;
4250                 params.opmode_notif =
4251                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4252         }
4253
4254         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4255                 params.plink_action =
4256                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4257                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4258                         return -EINVAL;
4259         }
4260
4261         err = nl80211_parse_sta_channel_info(info, &params);
4262         if (err)
4263                 return err;
4264
4265         err = nl80211_parse_sta_wme(info, &params);
4266         if (err)
4267                 return err;
4268
4269         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4270                 return -EINVAL;
4271
4272         /* When you run into this, adjust the code below for the new flag */
4273         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4274
4275         switch (dev->ieee80211_ptr->iftype) {
4276         case NL80211_IFTYPE_AP:
4277         case NL80211_IFTYPE_AP_VLAN:
4278         case NL80211_IFTYPE_P2P_GO:
4279                 /* ignore WME attributes if iface/sta is not capable */
4280                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4281                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4282                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4283
4284                 /* TDLS peers cannot be added */
4285                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4286                     info->attrs[NL80211_ATTR_PEER_AID])
4287                         return -EINVAL;
4288                 /* but don't bother the driver with it */
4289                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4290
4291                 /* allow authenticated/associated only if driver handles it */
4292                 if (!(rdev->wiphy.features &
4293                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4294                     params.sta_flags_mask &
4295                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4296                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4297                         return -EINVAL;
4298
4299                 /* must be last in here for error handling */
4300                 params.vlan = get_vlan(info, rdev);
4301                 if (IS_ERR(params.vlan))
4302                         return PTR_ERR(params.vlan);
4303                 break;
4304         case NL80211_IFTYPE_MESH_POINT:
4305                 /* ignore uAPSD data */
4306                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4307
4308                 /* associated is disallowed */
4309                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4310                         return -EINVAL;
4311                 /* TDLS peers cannot be added */
4312                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4313                     info->attrs[NL80211_ATTR_PEER_AID])
4314                         return -EINVAL;
4315                 break;
4316         case NL80211_IFTYPE_STATION:
4317         case NL80211_IFTYPE_P2P_CLIENT:
4318                 /* ignore uAPSD data */
4319                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4320
4321                 /* these are disallowed */
4322                 if (params.sta_flags_mask &
4323                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4324                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4325                         return -EINVAL;
4326                 /* Only TDLS peers can be added */
4327                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4328                         return -EINVAL;
4329                 /* Can only add if TDLS ... */
4330                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4331                         return -EOPNOTSUPP;
4332                 /* ... with external setup is supported */
4333                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4334                         return -EOPNOTSUPP;
4335                 /*
4336                  * Older wpa_supplicant versions always mark the TDLS peer
4337                  * as authorized, but it shouldn't yet be.
4338                  */
4339                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4340                 break;
4341         default:
4342                 return -EOPNOTSUPP;
4343         }
4344
4345         /* be aware of params.vlan when changing code here */
4346
4347         err = rdev_add_station(rdev, dev, mac_addr, &params);
4348
4349         if (params.vlan)
4350                 dev_put(params.vlan);
4351         return err;
4352 }
4353
4354 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4355 {
4356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4357         struct net_device *dev = info->user_ptr[1];
4358         u8 *mac_addr = NULL;
4359
4360         if (info->attrs[NL80211_ATTR_MAC])
4361                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4362
4363         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4364             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4365             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4366             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4367                 return -EINVAL;
4368
4369         if (!rdev->ops->del_station)
4370                 return -EOPNOTSUPP;
4371
4372         return rdev_del_station(rdev, dev, mac_addr);
4373 }
4374
4375 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4376                                 int flags, struct net_device *dev,
4377                                 u8 *dst, u8 *next_hop,
4378                                 struct mpath_info *pinfo)
4379 {
4380         void *hdr;
4381         struct nlattr *pinfoattr;
4382
4383         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4384         if (!hdr)
4385                 return -1;
4386
4387         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4388             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4389             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4390             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4391                 goto nla_put_failure;
4392
4393         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4394         if (!pinfoattr)
4395                 goto nla_put_failure;
4396         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4397             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4398                         pinfo->frame_qlen))
4399                 goto nla_put_failure;
4400         if (((pinfo->filled & MPATH_INFO_SN) &&
4401              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4402             ((pinfo->filled & MPATH_INFO_METRIC) &&
4403              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4404                          pinfo->metric)) ||
4405             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4406              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4407                          pinfo->exptime)) ||
4408             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4409              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4410                         pinfo->flags)) ||
4411             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4412              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4413                          pinfo->discovery_timeout)) ||
4414             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4415              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4416                         pinfo->discovery_retries)))
4417                 goto nla_put_failure;
4418
4419         nla_nest_end(msg, pinfoattr);
4420
4421         return genlmsg_end(msg, hdr);
4422
4423  nla_put_failure:
4424         genlmsg_cancel(msg, hdr);
4425         return -EMSGSIZE;
4426 }
4427
4428 static int nl80211_dump_mpath(struct sk_buff *skb,
4429                               struct netlink_callback *cb)
4430 {
4431         struct mpath_info pinfo;
4432         struct cfg80211_registered_device *rdev;
4433         struct wireless_dev *wdev;
4434         u8 dst[ETH_ALEN];
4435         u8 next_hop[ETH_ALEN];
4436         int path_idx = cb->args[2];
4437         int err;
4438
4439         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4440         if (err)
4441                 return err;
4442
4443         if (!rdev->ops->dump_mpath) {
4444                 err = -EOPNOTSUPP;
4445                 goto out_err;
4446         }
4447
4448         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4449                 err = -EOPNOTSUPP;
4450                 goto out_err;
4451         }
4452
4453         while (1) {
4454                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4455                                       next_hop, &pinfo);
4456                 if (err == -ENOENT)
4457                         break;
4458                 if (err)
4459                         goto out_err;
4460
4461                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4462                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4463                                        wdev->netdev, dst, next_hop,
4464                                        &pinfo) < 0)
4465                         goto out;
4466
4467                 path_idx++;
4468         }
4469
4470
4471  out:
4472         cb->args[2] = path_idx;
4473         err = skb->len;
4474  out_err:
4475         nl80211_finish_wdev_dump(rdev);
4476         return err;
4477 }
4478
4479 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4480 {
4481         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4482         int err;
4483         struct net_device *dev = info->user_ptr[1];
4484         struct mpath_info pinfo;
4485         struct sk_buff *msg;
4486         u8 *dst = NULL;
4487         u8 next_hop[ETH_ALEN];
4488
4489         memset(&pinfo, 0, sizeof(pinfo));
4490
4491         if (!info->attrs[NL80211_ATTR_MAC])
4492                 return -EINVAL;
4493
4494         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4495
4496         if (!rdev->ops->get_mpath)
4497                 return -EOPNOTSUPP;
4498
4499         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4500                 return -EOPNOTSUPP;
4501
4502         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4503         if (err)
4504                 return err;
4505
4506         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4507         if (!msg)
4508                 return -ENOMEM;
4509
4510         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4511                                  dev, dst, next_hop, &pinfo) < 0) {
4512                 nlmsg_free(msg);
4513                 return -ENOBUFS;
4514         }
4515
4516         return genlmsg_reply(msg, info);
4517 }
4518
4519 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4520 {
4521         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4522         struct net_device *dev = info->user_ptr[1];
4523         u8 *dst = NULL;
4524         u8 *next_hop = NULL;
4525
4526         if (!info->attrs[NL80211_ATTR_MAC])
4527                 return -EINVAL;
4528
4529         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4530                 return -EINVAL;
4531
4532         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4533         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4534
4535         if (!rdev->ops->change_mpath)
4536                 return -EOPNOTSUPP;
4537
4538         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4539                 return -EOPNOTSUPP;
4540
4541         return rdev_change_mpath(rdev, dev, dst, next_hop);
4542 }
4543
4544 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4545 {
4546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4547         struct net_device *dev = info->user_ptr[1];
4548         u8 *dst = NULL;
4549         u8 *next_hop = NULL;
4550
4551         if (!info->attrs[NL80211_ATTR_MAC])
4552                 return -EINVAL;
4553
4554         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4555                 return -EINVAL;
4556
4557         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4558         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4559
4560         if (!rdev->ops->add_mpath)
4561                 return -EOPNOTSUPP;
4562
4563         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4564                 return -EOPNOTSUPP;
4565
4566         return rdev_add_mpath(rdev, dev, dst, next_hop);
4567 }
4568
4569 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4570 {
4571         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4572         struct net_device *dev = info->user_ptr[1];
4573         u8 *dst = NULL;
4574
4575         if (info->attrs[NL80211_ATTR_MAC])
4576                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4577
4578         if (!rdev->ops->del_mpath)
4579                 return -EOPNOTSUPP;
4580
4581         return rdev_del_mpath(rdev, dev, dst);
4582 }
4583
4584 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4585 {
4586         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4587         struct net_device *dev = info->user_ptr[1];
4588         struct wireless_dev *wdev = dev->ieee80211_ptr;
4589         struct bss_parameters params;
4590         int err;
4591
4592         memset(&params, 0, sizeof(params));
4593         /* default to not changing parameters */
4594         params.use_cts_prot = -1;
4595         params.use_short_preamble = -1;
4596         params.use_short_slot_time = -1;
4597         params.ap_isolate = -1;
4598         params.ht_opmode = -1;
4599         params.p2p_ctwindow = -1;
4600         params.p2p_opp_ps = -1;
4601
4602         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4603                 params.use_cts_prot =
4604                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4605         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4606                 params.use_short_preamble =
4607                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4608         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4609                 params.use_short_slot_time =
4610                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4611         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4612                 params.basic_rates =
4613                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4614                 params.basic_rates_len =
4615                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4616         }
4617         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4618                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4619         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4620                 params.ht_opmode =
4621                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4622
4623         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4624                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4625                         return -EINVAL;
4626                 params.p2p_ctwindow =
4627                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4628                 if (params.p2p_ctwindow < 0)
4629                         return -EINVAL;
4630                 if (params.p2p_ctwindow != 0 &&
4631                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4632                         return -EINVAL;
4633         }
4634
4635         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4636                 u8 tmp;
4637
4638                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4639                         return -EINVAL;
4640                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4641                 if (tmp > 1)
4642                         return -EINVAL;
4643                 params.p2p_opp_ps = tmp;
4644                 if (params.p2p_opp_ps &&
4645                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4646                         return -EINVAL;
4647         }
4648
4649         if (!rdev->ops->change_bss)
4650                 return -EOPNOTSUPP;
4651
4652         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4653             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4654                 return -EOPNOTSUPP;
4655
4656         wdev_lock(wdev);
4657         err = rdev_change_bss(rdev, dev, &params);
4658         wdev_unlock(wdev);
4659
4660         return err;
4661 }
4662
4663 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4664         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4665         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4666         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4667         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4668         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4669         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4670         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
4671 };
4672
4673 static int parse_reg_rule(struct nlattr *tb[],
4674         struct ieee80211_reg_rule *reg_rule)
4675 {
4676         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4677         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4678
4679         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4680                 return -EINVAL;
4681         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4682                 return -EINVAL;
4683         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4684                 return -EINVAL;
4685         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4686                 return -EINVAL;
4687         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4688                 return -EINVAL;
4689
4690         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4691
4692         freq_range->start_freq_khz =
4693                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4694         freq_range->end_freq_khz =
4695                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4696         freq_range->max_bandwidth_khz =
4697                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4698
4699         power_rule->max_eirp =
4700                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4701
4702         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4703                 power_rule->max_antenna_gain =
4704                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4705
4706         if (tb[NL80211_ATTR_DFS_CAC_TIME])
4707                 reg_rule->dfs_cac_ms =
4708                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
4709
4710         return 0;
4711 }
4712
4713 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4714 {
4715         char *data = NULL;
4716         enum nl80211_user_reg_hint_type user_reg_hint_type;
4717
4718         /*
4719          * You should only get this when cfg80211 hasn't yet initialized
4720          * completely when built-in to the kernel right between the time
4721          * window between nl80211_init() and regulatory_init(), if that is
4722          * even possible.
4723          */
4724         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4725                 return -EINPROGRESS;
4726
4727         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4728                 user_reg_hint_type =
4729                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4730         else
4731                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4732
4733         switch (user_reg_hint_type) {
4734         case NL80211_USER_REG_HINT_USER:
4735         case NL80211_USER_REG_HINT_CELL_BASE:
4736                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4737                         return -EINVAL;
4738
4739                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4740                 return regulatory_hint_user(data, user_reg_hint_type);
4741         case NL80211_USER_REG_HINT_INDOOR:
4742                 return regulatory_hint_indoor_user();
4743         default:
4744                 return -EINVAL;
4745         }
4746 }
4747
4748 static int nl80211_get_mesh_config(struct sk_buff *skb,
4749                                    struct genl_info *info)
4750 {
4751         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4752         struct net_device *dev = info->user_ptr[1];
4753         struct wireless_dev *wdev = dev->ieee80211_ptr;
4754         struct mesh_config cur_params;
4755         int err = 0;
4756         void *hdr;
4757         struct nlattr *pinfoattr;
4758         struct sk_buff *msg;
4759
4760         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4761                 return -EOPNOTSUPP;
4762
4763         if (!rdev->ops->get_mesh_config)
4764                 return -EOPNOTSUPP;
4765
4766         wdev_lock(wdev);
4767         /* If not connected, get default parameters */
4768         if (!wdev->mesh_id_len)
4769                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4770         else
4771                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4772         wdev_unlock(wdev);
4773
4774         if (err)
4775                 return err;
4776
4777         /* Draw up a netlink message to send back */
4778         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4779         if (!msg)
4780                 return -ENOMEM;
4781         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4782                              NL80211_CMD_GET_MESH_CONFIG);
4783         if (!hdr)
4784                 goto out;
4785         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4786         if (!pinfoattr)
4787                 goto nla_put_failure;
4788         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4789             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4790                         cur_params.dot11MeshRetryTimeout) ||
4791             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4792                         cur_params.dot11MeshConfirmTimeout) ||
4793             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4794                         cur_params.dot11MeshHoldingTimeout) ||
4795             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4796                         cur_params.dot11MeshMaxPeerLinks) ||
4797             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4798                        cur_params.dot11MeshMaxRetries) ||
4799             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4800                        cur_params.dot11MeshTTL) ||
4801             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4802                        cur_params.element_ttl) ||
4803             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4804                        cur_params.auto_open_plinks) ||
4805             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4806                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4807             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4808                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4809             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4810                         cur_params.path_refresh_time) ||
4811             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4812                         cur_params.min_discovery_timeout) ||
4813             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4814                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4815             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4816                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4817             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4818                         cur_params.dot11MeshHWMPperrMinInterval) ||
4819             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4820                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4821             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4822                        cur_params.dot11MeshHWMPRootMode) ||
4823             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4824                         cur_params.dot11MeshHWMPRannInterval) ||
4825             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4826                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4827             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4828                        cur_params.dot11MeshForwarding) ||
4829             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4830                         cur_params.rssi_threshold) ||
4831             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4832                         cur_params.ht_opmode) ||
4833             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4834                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4835             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4836                         cur_params.dot11MeshHWMProotInterval) ||
4837             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4838                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4839             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4840                         cur_params.power_mode) ||
4841             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4842                         cur_params.dot11MeshAwakeWindowDuration) ||
4843             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4844                         cur_params.plink_timeout))
4845                 goto nla_put_failure;
4846         nla_nest_end(msg, pinfoattr);
4847         genlmsg_end(msg, hdr);
4848         return genlmsg_reply(msg, info);
4849
4850  nla_put_failure:
4851         genlmsg_cancel(msg, hdr);
4852  out:
4853         nlmsg_free(msg);
4854         return -ENOBUFS;
4855 }
4856
4857 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4858         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4859         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4860         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4861         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4862         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4863         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4864         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4865         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4866         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4867         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4868         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4869         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4870         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4871         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4872         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4873         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4874         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4875         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4876         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4877         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4878         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4879         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4880         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4881         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4882         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4883         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4884         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4885         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4886 };
4887
4888 static const struct nla_policy
4889         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4890         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4891         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4892         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4893         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4894         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4895         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4896         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4897                                     .len = IEEE80211_MAX_DATA_LEN },
4898         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4899 };
4900
4901 static int nl80211_parse_mesh_config(struct genl_info *info,
4902                                      struct mesh_config *cfg,
4903                                      u32 *mask_out)
4904 {
4905         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4906         u32 mask = 0;
4907
4908 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4909 do {                                                                        \
4910         if (tb[attr]) {                                                     \
4911                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4912                         return -EINVAL;                                     \
4913                 cfg->param = fn(tb[attr]);                                  \
4914                 mask |= (1 << (attr - 1));                                  \
4915         }                                                                   \
4916 } while (0)
4917
4918
4919         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4920                 return -EINVAL;
4921         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4922                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4923                              nl80211_meshconf_params_policy))
4924                 return -EINVAL;
4925
4926         /* This makes sure that there aren't more than 32 mesh config
4927          * parameters (otherwise our bitfield scheme would not work.) */
4928         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4929
4930         /* Fill in the params struct */
4931         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4932                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4933                                   nla_get_u16);
4934         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4935                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4936                                   nla_get_u16);
4937         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4938                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4939                                   nla_get_u16);
4940         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4941                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4942                                   nla_get_u16);
4943         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4944                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4945                                   nla_get_u8);
4946         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4947                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4948         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4949                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4950                                   nla_get_u8);
4951         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4952                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4953                                   nla_get_u8);
4954         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4955                                   1, 255, mask,
4956                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4957                                   nla_get_u32);
4958         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4959                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4960                                   nla_get_u8);
4961         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4962                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4963                                   nla_get_u32);
4964         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4965                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4966                                   nla_get_u16);
4967         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4968                                   1, 65535, mask,
4969                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4970                                   nla_get_u32);
4971         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4972                                   1, 65535, mask,
4973                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4974                                   nla_get_u16);
4975         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4976                                   1, 65535, mask,
4977                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4978                                   nla_get_u16);
4979         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4980                                   dot11MeshHWMPnetDiameterTraversalTime,
4981                                   1, 65535, mask,
4982                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4983                                   nla_get_u16);
4984         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4985                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4986                                   nla_get_u8);
4987         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4988                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4989                                   nla_get_u16);
4990         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4991                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4992                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4993                                   nla_get_u8);
4994         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4995                                   mask, NL80211_MESHCONF_FORWARDING,
4996                                   nla_get_u8);
4997         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4998                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4999                                   nla_get_s32);
5000         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5001                                   mask, NL80211_MESHCONF_HT_OPMODE,
5002                                   nla_get_u16);
5003         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5004                                   1, 65535, mask,
5005                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5006                                   nla_get_u32);
5007         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5008                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5009                                   nla_get_u16);
5010         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5011                                   dot11MeshHWMPconfirmationInterval,
5012                                   1, 65535, mask,
5013                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5014                                   nla_get_u16);
5015         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5016                                   NL80211_MESH_POWER_ACTIVE,
5017                                   NL80211_MESH_POWER_MAX,
5018                                   mask, NL80211_MESHCONF_POWER_MODE,
5019                                   nla_get_u32);
5020         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5021                                   0, 65535, mask,
5022                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
5024                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5025                                   nla_get_u32);
5026         if (mask_out)
5027                 *mask_out = mask;
5028
5029         return 0;
5030
5031 #undef FILL_IN_MESH_PARAM_IF_SET
5032 }
5033
5034 static int nl80211_parse_mesh_setup(struct genl_info *info,
5035                                      struct mesh_setup *setup)
5036 {
5037         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5038         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5039
5040         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5041                 return -EINVAL;
5042         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5043                              info->attrs[NL80211_ATTR_MESH_SETUP],
5044                              nl80211_mesh_setup_params_policy))
5045                 return -EINVAL;
5046
5047         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5048                 setup->sync_method =
5049                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5050                  IEEE80211_SYNC_METHOD_VENDOR :
5051                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5052
5053         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5054                 setup->path_sel_proto =
5055                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5056                  IEEE80211_PATH_PROTOCOL_VENDOR :
5057                  IEEE80211_PATH_PROTOCOL_HWMP;
5058
5059         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5060                 setup->path_metric =
5061                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5062                  IEEE80211_PATH_METRIC_VENDOR :
5063                  IEEE80211_PATH_METRIC_AIRTIME;
5064
5065
5066         if (tb[NL80211_MESH_SETUP_IE]) {
5067                 struct nlattr *ieattr =
5068                         tb[NL80211_MESH_SETUP_IE];
5069                 if (!is_valid_ie_attr(ieattr))
5070                         return -EINVAL;
5071                 setup->ie = nla_data(ieattr);
5072                 setup->ie_len = nla_len(ieattr);
5073         }
5074         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5075             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5076                 return -EINVAL;
5077         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5078         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5079         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5080         if (setup->is_secure)
5081                 setup->user_mpm = true;
5082
5083         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5084                 if (!setup->user_mpm)
5085                         return -EINVAL;
5086                 setup->auth_id =
5087                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5088         }
5089
5090         return 0;
5091 }
5092
5093 static int nl80211_update_mesh_config(struct sk_buff *skb,
5094                                       struct genl_info *info)
5095 {
5096         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5097         struct net_device *dev = info->user_ptr[1];
5098         struct wireless_dev *wdev = dev->ieee80211_ptr;
5099         struct mesh_config cfg;
5100         u32 mask;
5101         int err;
5102
5103         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5104                 return -EOPNOTSUPP;
5105
5106         if (!rdev->ops->update_mesh_config)
5107                 return -EOPNOTSUPP;
5108
5109         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5110         if (err)
5111                 return err;
5112
5113         wdev_lock(wdev);
5114         if (!wdev->mesh_id_len)
5115                 err = -ENOLINK;
5116
5117         if (!err)
5118                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5119
5120         wdev_unlock(wdev);
5121
5122         return err;
5123 }
5124
5125 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5126 {
5127         const struct ieee80211_regdomain *regdom;
5128         struct sk_buff *msg;
5129         void *hdr = NULL;
5130         struct nlattr *nl_reg_rules;
5131         unsigned int i;
5132
5133         if (!cfg80211_regdomain)
5134                 return -EINVAL;
5135
5136         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5137         if (!msg)
5138                 return -ENOBUFS;
5139
5140         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5141                              NL80211_CMD_GET_REG);
5142         if (!hdr)
5143                 goto put_failure;
5144
5145         if (reg_last_request_cell_base() &&
5146             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5147                         NL80211_USER_REG_HINT_CELL_BASE))
5148                 goto nla_put_failure;
5149
5150         rcu_read_lock();
5151         regdom = rcu_dereference(cfg80211_regdomain);
5152
5153         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5154             (regdom->dfs_region &&
5155              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5156                 goto nla_put_failure_rcu;
5157
5158         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5159         if (!nl_reg_rules)
5160                 goto nla_put_failure_rcu;
5161
5162         for (i = 0; i < regdom->n_reg_rules; i++) {
5163                 struct nlattr *nl_reg_rule;
5164                 const struct ieee80211_reg_rule *reg_rule;
5165                 const struct ieee80211_freq_range *freq_range;
5166                 const struct ieee80211_power_rule *power_rule;
5167                 unsigned int max_bandwidth_khz;
5168
5169                 reg_rule = &regdom->reg_rules[i];
5170                 freq_range = &reg_rule->freq_range;
5171                 power_rule = &reg_rule->power_rule;
5172
5173                 nl_reg_rule = nla_nest_start(msg, i);
5174                 if (!nl_reg_rule)
5175                         goto nla_put_failure_rcu;
5176
5177                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5178                 if (!max_bandwidth_khz)
5179                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5180                                                                   reg_rule);
5181
5182                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5183                                 reg_rule->flags) ||
5184                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5185                                 freq_range->start_freq_khz) ||
5186                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5187                                 freq_range->end_freq_khz) ||
5188                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5189                                 max_bandwidth_khz) ||
5190                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5191                                 power_rule->max_antenna_gain) ||
5192                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5193                                 power_rule->max_eirp) ||
5194                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5195                                 reg_rule->dfs_cac_ms))
5196                         goto nla_put_failure_rcu;
5197
5198                 nla_nest_end(msg, nl_reg_rule);
5199         }
5200         rcu_read_unlock();
5201
5202         nla_nest_end(msg, nl_reg_rules);
5203
5204         genlmsg_end(msg, hdr);
5205         return genlmsg_reply(msg, info);
5206
5207 nla_put_failure_rcu:
5208         rcu_read_unlock();
5209 nla_put_failure:
5210         genlmsg_cancel(msg, hdr);
5211 put_failure:
5212         nlmsg_free(msg);
5213         return -EMSGSIZE;
5214 }
5215
5216 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5217 {
5218         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5219         struct nlattr *nl_reg_rule;
5220         char *alpha2 = NULL;
5221         int rem_reg_rules = 0, r = 0;
5222         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5223         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5224         struct ieee80211_regdomain *rd = NULL;
5225
5226         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5227                 return -EINVAL;
5228
5229         if (!info->attrs[NL80211_ATTR_REG_RULES])
5230                 return -EINVAL;
5231
5232         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5233
5234         if (info->attrs[NL80211_ATTR_DFS_REGION])
5235                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5236
5237         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5238                             rem_reg_rules) {
5239                 num_rules++;
5240                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5241                         return -EINVAL;
5242         }
5243
5244         if (!reg_is_valid_request(alpha2))
5245                 return -EINVAL;
5246
5247         size_of_regd = sizeof(struct ieee80211_regdomain) +
5248                        num_rules * sizeof(struct ieee80211_reg_rule);
5249
5250         rd = kzalloc(size_of_regd, GFP_KERNEL);
5251         if (!rd)
5252                 return -ENOMEM;
5253
5254         rd->n_reg_rules = num_rules;
5255         rd->alpha2[0] = alpha2[0];
5256         rd->alpha2[1] = alpha2[1];
5257
5258         /*
5259          * Disable DFS master mode if the DFS region was
5260          * not supported or known on this kernel.
5261          */
5262         if (reg_supported_dfs_region(dfs_region))
5263                 rd->dfs_region = dfs_region;
5264
5265         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5266                             rem_reg_rules) {
5267                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5268                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5269                               reg_rule_policy);
5270                 if (r)
5271                         goto bad_reg;
5272                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5273                 if (r)
5274                         goto bad_reg;
5275
5276                 rule_idx++;
5277
5278                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5279                         r = -EINVAL;
5280                         goto bad_reg;
5281                 }
5282         }
5283
5284         r = set_regdom(rd);
5285         /* set_regdom took ownership */
5286         rd = NULL;
5287
5288  bad_reg:
5289         kfree(rd);
5290         return r;
5291 }
5292
5293 static int validate_scan_freqs(struct nlattr *freqs)
5294 {
5295         struct nlattr *attr1, *attr2;
5296         int n_channels = 0, tmp1, tmp2;
5297
5298         nla_for_each_nested(attr1, freqs, tmp1) {
5299                 n_channels++;
5300                 /*
5301                  * Some hardware has a limited channel list for
5302                  * scanning, and it is pretty much nonsensical
5303                  * to scan for a channel twice, so disallow that
5304                  * and don't require drivers to check that the
5305                  * channel list they get isn't longer than what
5306                  * they can scan, as long as they can scan all
5307                  * the channels they registered at once.
5308                  */
5309                 nla_for_each_nested(attr2, freqs, tmp2)
5310                         if (attr1 != attr2 &&
5311                             nla_get_u32(attr1) == nla_get_u32(attr2))
5312                                 return 0;
5313         }
5314
5315         return n_channels;
5316 }
5317
5318 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5319 {
5320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5321         struct wireless_dev *wdev = info->user_ptr[1];
5322         struct cfg80211_scan_request *request;
5323         struct nlattr *attr;
5324         struct wiphy *wiphy;
5325         int err, tmp, n_ssids = 0, n_channels, i;
5326         size_t ie_len;
5327
5328         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5329                 return -EINVAL;
5330
5331         wiphy = &rdev->wiphy;
5332
5333         if (!rdev->ops->scan)
5334                 return -EOPNOTSUPP;
5335
5336         if (rdev->scan_req || rdev->scan_msg) {
5337                 err = -EBUSY;
5338                 goto unlock;
5339         }
5340
5341         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5342                 n_channels = validate_scan_freqs(
5343                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5344                 if (!n_channels) {
5345                         err = -EINVAL;
5346                         goto unlock;
5347                 }
5348         } else {
5349                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5350         }
5351
5352         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5353                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5354                         n_ssids++;
5355
5356         if (n_ssids > wiphy->max_scan_ssids) {
5357                 err = -EINVAL;
5358                 goto unlock;
5359         }
5360
5361         if (info->attrs[NL80211_ATTR_IE])
5362                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5363         else
5364                 ie_len = 0;
5365
5366         if (ie_len > wiphy->max_scan_ie_len) {
5367                 err = -EINVAL;
5368                 goto unlock;
5369         }
5370
5371         request = kzalloc(sizeof(*request)
5372                         + sizeof(*request->ssids) * n_ssids
5373                         + sizeof(*request->channels) * n_channels
5374                         + ie_len, GFP_KERNEL);
5375         if (!request) {
5376                 err = -ENOMEM;
5377                 goto unlock;
5378         }
5379
5380         if (n_ssids)
5381                 request->ssids = (void *)&request->channels[n_channels];
5382         request->n_ssids = n_ssids;
5383         if (ie_len) {
5384                 if (request->ssids)
5385                         request->ie = (void *)(request->ssids + n_ssids);
5386                 else
5387                         request->ie = (void *)(request->channels + n_channels);
5388         }
5389
5390         i = 0;
5391         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5392                 /* user specified, bail out if channel not found */
5393                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5394                         struct ieee80211_channel *chan;
5395
5396                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5397
5398                         if (!chan) {
5399                                 err = -EINVAL;
5400                                 goto out_free;
5401                         }
5402
5403                         /* ignore disabled channels */
5404                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5405                                 continue;
5406
5407                         request->channels[i] = chan;
5408                         i++;
5409                 }
5410         } else {
5411                 enum ieee80211_band band;
5412
5413                 /* all channels */
5414                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5415                         int j;
5416                         if (!wiphy->bands[band])
5417                                 continue;
5418                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5419                                 struct ieee80211_channel *chan;
5420
5421                                 chan = &wiphy->bands[band]->channels[j];
5422
5423                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5424                                         continue;
5425
5426                                 request->channels[i] = chan;
5427                                 i++;
5428                         }
5429                 }
5430         }
5431
5432         if (!i) {
5433                 err = -EINVAL;
5434                 goto out_free;
5435         }
5436
5437         request->n_channels = i;
5438
5439         i = 0;
5440         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5441                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5442                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5443                                 err = -EINVAL;
5444                                 goto out_free;
5445                         }
5446                         request->ssids[i].ssid_len = nla_len(attr);
5447                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5448                         i++;
5449                 }
5450         }
5451
5452         if (info->attrs[NL80211_ATTR_IE]) {
5453                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5454                 memcpy((void *)request->ie,
5455                        nla_data(info->attrs[NL80211_ATTR_IE]),
5456                        request->ie_len);
5457         }
5458
5459         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5460                 if (wiphy->bands[i])
5461                         request->rates[i] =
5462                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5463
5464         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5465                 nla_for_each_nested(attr,
5466                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5467                                     tmp) {
5468                         enum ieee80211_band band = nla_type(attr);
5469
5470                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5471                                 err = -EINVAL;
5472                                 goto out_free;
5473                         }
5474
5475                         if (!wiphy->bands[band])
5476                                 continue;
5477
5478                         err = ieee80211_get_ratemask(wiphy->bands[band],
5479                                                      nla_data(attr),
5480                                                      nla_len(attr),
5481                                                      &request->rates[band]);
5482                         if (err)
5483                                 goto out_free;
5484                 }
5485         }
5486
5487         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5488                 request->flags = nla_get_u32(
5489                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5490                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5491                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5492                         err = -EOPNOTSUPP;
5493                         goto out_free;
5494                 }
5495         }
5496
5497         request->no_cck =
5498                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5499
5500         request->wdev = wdev;
5501         request->wiphy = &rdev->wiphy;
5502         request->scan_start = jiffies;
5503
5504         rdev->scan_req = request;
5505         err = rdev_scan(rdev, request);
5506
5507         if (!err) {
5508                 nl80211_send_scan_start(rdev, wdev);
5509                 if (wdev->netdev)
5510                         dev_hold(wdev->netdev);
5511         } else {
5512  out_free:
5513                 rdev->scan_req = NULL;
5514                 kfree(request);
5515         }
5516
5517  unlock:
5518         return err;
5519 }
5520
5521 static int nl80211_start_sched_scan(struct sk_buff *skb,
5522                                     struct genl_info *info)
5523 {
5524         struct cfg80211_sched_scan_request *request;
5525         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5526         struct net_device *dev = info->user_ptr[1];
5527         struct nlattr *attr;
5528         struct wiphy *wiphy;
5529         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5530         u32 interval;
5531         enum ieee80211_band band;
5532         size_t ie_len;
5533         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5534         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
5535
5536         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5537             !rdev->ops->sched_scan_start)
5538                 return -EOPNOTSUPP;
5539
5540         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5541                 return -EINVAL;
5542
5543         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5544                 return -EINVAL;
5545
5546         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5547         if (interval == 0)
5548                 return -EINVAL;
5549
5550         wiphy = &rdev->wiphy;
5551
5552         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5553                 n_channels = validate_scan_freqs(
5554                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5555                 if (!n_channels)
5556                         return -EINVAL;
5557         } else {
5558                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5559         }
5560
5561         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5562                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5563                                     tmp)
5564                         n_ssids++;
5565
5566         if (n_ssids > wiphy->max_sched_scan_ssids)
5567                 return -EINVAL;
5568
5569         /*
5570          * First, count the number of 'real' matchsets. Due to an issue with
5571          * the old implementation, matchsets containing only the RSSI attribute
5572          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
5573          * RSSI for all matchsets, rather than their own matchset for reporting
5574          * all APs with a strong RSSI. This is needed to be compatible with
5575          * older userspace that treated a matchset with only the RSSI as the
5576          * global RSSI for all other matchsets - if there are other matchsets.
5577          */
5578         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5579                 nla_for_each_nested(attr,
5580                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5581                                     tmp) {
5582                         struct nlattr *rssi;
5583
5584                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5585                                         nla_data(attr), nla_len(attr),
5586                                         nl80211_match_policy);
5587                         if (err)
5588                                 return err;
5589                         /* add other standalone attributes here */
5590                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
5591                                 n_match_sets++;
5592                                 continue;
5593                         }
5594                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5595                         if (rssi)
5596                                 default_match_rssi = nla_get_s32(rssi);
5597                 }
5598         }
5599
5600         /* However, if there's no other matchset, add the RSSI one */
5601         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
5602                 n_match_sets = 1;
5603
5604         if (n_match_sets > wiphy->max_match_sets)
5605                 return -EINVAL;
5606
5607         if (info->attrs[NL80211_ATTR_IE])
5608                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5609         else
5610                 ie_len = 0;
5611
5612         if (ie_len > wiphy->max_sched_scan_ie_len)
5613                 return -EINVAL;
5614
5615         if (rdev->sched_scan_req) {
5616                 err = -EINPROGRESS;
5617                 goto out;
5618         }
5619
5620         request = kzalloc(sizeof(*request)
5621                         + sizeof(*request->ssids) * n_ssids
5622                         + sizeof(*request->match_sets) * n_match_sets
5623                         + sizeof(*request->channels) * n_channels
5624                         + ie_len, GFP_KERNEL);
5625         if (!request) {
5626                 err = -ENOMEM;
5627                 goto out;
5628         }
5629
5630         if (n_ssids)
5631                 request->ssids = (void *)&request->channels[n_channels];
5632         request->n_ssids = n_ssids;
5633         if (ie_len) {
5634                 if (request->ssids)
5635                         request->ie = (void *)(request->ssids + n_ssids);
5636                 else
5637                         request->ie = (void *)(request->channels + n_channels);
5638         }
5639
5640         if (n_match_sets) {
5641                 if (request->ie)
5642                         request->match_sets = (void *)(request->ie + ie_len);
5643                 else if (request->ssids)
5644                         request->match_sets =
5645                                 (void *)(request->ssids + n_ssids);
5646                 else
5647                         request->match_sets =
5648                                 (void *)(request->channels + n_channels);
5649         }
5650         request->n_match_sets = n_match_sets;
5651
5652         i = 0;
5653         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5654                 /* user specified, bail out if channel not found */
5655                 nla_for_each_nested(attr,
5656                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5657                                     tmp) {
5658                         struct ieee80211_channel *chan;
5659
5660                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5661
5662                         if (!chan) {
5663                                 err = -EINVAL;
5664                                 goto out_free;
5665                         }
5666
5667                         /* ignore disabled channels */
5668                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5669                                 continue;
5670
5671                         request->channels[i] = chan;
5672                         i++;
5673                 }
5674         } else {
5675                 /* all channels */
5676                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5677                         int j;
5678                         if (!wiphy->bands[band])
5679                                 continue;
5680                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5681                                 struct ieee80211_channel *chan;
5682
5683                                 chan = &wiphy->bands[band]->channels[j];
5684
5685                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5686                                         continue;
5687
5688                                 request->channels[i] = chan;
5689                                 i++;
5690                         }
5691                 }
5692         }
5693
5694         if (!i) {
5695                 err = -EINVAL;
5696                 goto out_free;
5697         }
5698
5699         request->n_channels = i;
5700
5701         i = 0;
5702         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5703                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5704                                     tmp) {
5705                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5706                                 err = -EINVAL;
5707                                 goto out_free;
5708                         }
5709                         request->ssids[i].ssid_len = nla_len(attr);
5710                         memcpy(request->ssids[i].ssid, nla_data(attr),
5711                                nla_len(attr));
5712                         i++;
5713                 }
5714         }
5715
5716         i = 0;
5717         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5718                 nla_for_each_nested(attr,
5719                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5720                                     tmp) {
5721                         struct nlattr *ssid, *rssi;
5722
5723                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5724                                         nla_data(attr), nla_len(attr),
5725                                         nl80211_match_policy);
5726                         if (err)
5727                                 goto out_free;
5728                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5729                         if (ssid) {
5730                                 if (WARN_ON(i >= n_match_sets)) {
5731                                         /* this indicates a programming error,
5732                                          * the loop above should have verified
5733                                          * things properly
5734                                          */
5735                                         err = -EINVAL;
5736                                         goto out_free;
5737                                 }
5738
5739                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5740                                         err = -EINVAL;
5741                                         goto out_free;
5742                                 }
5743                                 memcpy(request->match_sets[i].ssid.ssid,
5744                                        nla_data(ssid), nla_len(ssid));
5745                                 request->match_sets[i].ssid.ssid_len =
5746                                         nla_len(ssid);
5747                                 /* special attribute - old implemenation w/a */
5748                                 request->match_sets[i].rssi_thold =
5749                                         default_match_rssi;
5750                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5751                                 if (rssi)
5752                                         request->match_sets[i].rssi_thold =
5753                                                 nla_get_s32(rssi);
5754                         }
5755                         i++;
5756                 }
5757
5758                 /* there was no other matchset, so the RSSI one is alone */
5759                 if (i == 0)
5760                         request->match_sets[0].rssi_thold = default_match_rssi;
5761
5762                 request->min_rssi_thold = INT_MAX;
5763                 for (i = 0; i < n_match_sets; i++)
5764                         request->min_rssi_thold =
5765                                 min(request->match_sets[i].rssi_thold,
5766                                     request->min_rssi_thold);
5767         } else {
5768                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
5769         }
5770
5771         if (ie_len) {
5772                 request->ie_len = ie_len;
5773                 memcpy((void *)request->ie,
5774                        nla_data(info->attrs[NL80211_ATTR_IE]),
5775                        request->ie_len);
5776         }
5777
5778         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5779                 request->flags = nla_get_u32(
5780                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5781                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5782                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5783                         err = -EOPNOTSUPP;
5784                         goto out_free;
5785                 }
5786         }
5787
5788         request->dev = dev;
5789         request->wiphy = &rdev->wiphy;
5790         request->interval = interval;
5791         request->scan_start = jiffies;
5792
5793         err = rdev_sched_scan_start(rdev, dev, request);
5794         if (!err) {
5795                 rdev->sched_scan_req = request;
5796                 nl80211_send_sched_scan(rdev, dev,
5797                                         NL80211_CMD_START_SCHED_SCAN);
5798                 goto out;
5799         }
5800
5801 out_free:
5802         kfree(request);
5803 out:
5804         return err;
5805 }
5806
5807 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5808                                    struct genl_info *info)
5809 {
5810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5811
5812         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5813             !rdev->ops->sched_scan_stop)
5814                 return -EOPNOTSUPP;
5815
5816         return __cfg80211_stop_sched_scan(rdev, false);
5817 }
5818
5819 static int nl80211_start_radar_detection(struct sk_buff *skb,
5820                                          struct genl_info *info)
5821 {
5822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5823         struct net_device *dev = info->user_ptr[1];
5824         struct wireless_dev *wdev = dev->ieee80211_ptr;
5825         struct cfg80211_chan_def chandef;
5826         enum nl80211_dfs_regions dfs_region;
5827         unsigned int cac_time_ms;
5828         int err;
5829
5830         dfs_region = reg_get_dfs_region(wdev->wiphy);
5831         if (dfs_region == NL80211_DFS_UNSET)
5832                 return -EINVAL;
5833
5834         err = nl80211_parse_chandef(rdev, info, &chandef);
5835         if (err)
5836                 return err;
5837
5838         if (netif_carrier_ok(dev))
5839                 return -EBUSY;
5840
5841         if (wdev->cac_started)
5842                 return -EBUSY;
5843
5844         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
5845                                             wdev->iftype);
5846         if (err < 0)
5847                 return err;
5848
5849         if (err == 0)
5850                 return -EINVAL;
5851
5852         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
5853                 return -EINVAL;
5854
5855         if (!rdev->ops->start_radar_detection)
5856                 return -EOPNOTSUPP;
5857
5858         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
5859         if (WARN_ON(!cac_time_ms))
5860                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
5861
5862         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
5863                                                cac_time_ms);
5864         if (!err) {
5865                 wdev->chandef = chandef;
5866                 wdev->cac_started = true;
5867                 wdev->cac_start_time = jiffies;
5868                 wdev->cac_time_ms = cac_time_ms;
5869         }
5870         return err;
5871 }
5872
5873 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5874 {
5875         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5876         struct net_device *dev = info->user_ptr[1];
5877         struct wireless_dev *wdev = dev->ieee80211_ptr;
5878         struct cfg80211_csa_settings params;
5879         /* csa_attrs is defined static to avoid waste of stack size - this
5880          * function is called under RTNL lock, so this should not be a problem.
5881          */
5882         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5883         u8 radar_detect_width = 0;
5884         int err;
5885         bool need_new_beacon = false;
5886         int len, i;
5887
5888         if (!rdev->ops->channel_switch ||
5889             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5890                 return -EOPNOTSUPP;
5891
5892         switch (dev->ieee80211_ptr->iftype) {
5893         case NL80211_IFTYPE_AP:
5894         case NL80211_IFTYPE_P2P_GO:
5895                 need_new_beacon = true;
5896
5897                 /* useless if AP is not running */
5898                 if (!wdev->beacon_interval)
5899                         return -ENOTCONN;
5900                 break;
5901         case NL80211_IFTYPE_ADHOC:
5902                 if (!wdev->ssid_len)
5903                         return -ENOTCONN;
5904                 break;
5905         case NL80211_IFTYPE_MESH_POINT:
5906                 if (!wdev->mesh_id_len)
5907                         return -ENOTCONN;
5908                 break;
5909         default:
5910                 return -EOPNOTSUPP;
5911         }
5912
5913         memset(&params, 0, sizeof(params));
5914
5915         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5916             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5917                 return -EINVAL;
5918
5919         /* only important for AP, IBSS and mesh create IEs internally */
5920         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5921                 return -EINVAL;
5922
5923         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5924
5925         if (!need_new_beacon)
5926                 goto skip_beacons;
5927
5928         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5929         if (err)
5930                 return err;
5931
5932         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5933                                info->attrs[NL80211_ATTR_CSA_IES],
5934                                nl80211_policy);
5935         if (err)
5936                 return err;
5937
5938         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5939         if (err)
5940                 return err;
5941
5942         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5943                 return -EINVAL;
5944
5945         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5946         if (!len || (len % sizeof(u16)))
5947                 return -EINVAL;
5948
5949         params.n_counter_offsets_beacon = len / sizeof(u16);
5950         if (rdev->wiphy.max_num_csa_counters &&
5951             (params.n_counter_offsets_beacon >
5952              rdev->wiphy.max_num_csa_counters))
5953                 return -EINVAL;
5954
5955         params.counter_offsets_beacon =
5956                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5957
5958         /* sanity checks - counters should fit and be the same */
5959         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
5960                 u16 offset = params.counter_offsets_beacon[i];
5961
5962                 if (offset >= params.beacon_csa.tail_len)
5963                         return -EINVAL;
5964
5965                 if (params.beacon_csa.tail[offset] != params.count)
5966                         return -EINVAL;
5967         }
5968
5969         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5970                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5971                 if (!len || (len % sizeof(u16)))
5972                         return -EINVAL;
5973
5974                 params.n_counter_offsets_presp = len / sizeof(u16);
5975                 if (rdev->wiphy.max_num_csa_counters &&
5976                     (params.n_counter_offsets_beacon >
5977                      rdev->wiphy.max_num_csa_counters))
5978                         return -EINVAL;
5979
5980                 params.counter_offsets_presp =
5981                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5982
5983                 /* sanity checks - counters should fit and be the same */
5984                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
5985                         u16 offset = params.counter_offsets_presp[i];
5986
5987                         if (offset >= params.beacon_csa.probe_resp_len)
5988                                 return -EINVAL;
5989
5990                         if (params.beacon_csa.probe_resp[offset] !=
5991                             params.count)
5992                                 return -EINVAL;
5993                 }
5994         }
5995
5996 skip_beacons:
5997         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5998         if (err)
5999                 return err;
6000
6001         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
6002                                      wdev->iftype))
6003                 return -EINVAL;
6004
6005         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6006                                             &params.chandef,
6007                                             wdev->iftype);
6008         if (err < 0)
6009                 return err;
6010
6011         if (err > 0) {
6012                 radar_detect_width = BIT(params.chandef.width);
6013                 params.radar_required = true;
6014         }
6015
6016         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6017                 params.block_tx = true;
6018
6019         wdev_lock(wdev);
6020         err = rdev_channel_switch(rdev, dev, &params);
6021         wdev_unlock(wdev);
6022
6023         return err;
6024 }
6025
6026 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6027                             u32 seq, int flags,
6028                             struct cfg80211_registered_device *rdev,
6029                             struct wireless_dev *wdev,
6030                             struct cfg80211_internal_bss *intbss)
6031 {
6032         struct cfg80211_bss *res = &intbss->pub;
6033         const struct cfg80211_bss_ies *ies;
6034         void *hdr;
6035         struct nlattr *bss;
6036
6037         ASSERT_WDEV_LOCK(wdev);
6038
6039         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6040                              NL80211_CMD_NEW_SCAN_RESULTS);
6041         if (!hdr)
6042                 return -1;
6043
6044         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6045
6046         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6047                 goto nla_put_failure;
6048         if (wdev->netdev &&
6049             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6050                 goto nla_put_failure;
6051         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6052                 goto nla_put_failure;
6053
6054         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6055         if (!bss)
6056                 goto nla_put_failure;
6057         if ((!is_zero_ether_addr(res->bssid) &&
6058              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6059                 goto nla_put_failure;
6060
6061         rcu_read_lock();
6062         /* indicate whether we have probe response data or not */
6063         if (rcu_access_pointer(res->proberesp_ies) &&
6064             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6065                 goto fail_unlock_rcu;
6066
6067         /* this pointer prefers to be pointed to probe response data
6068          * but is always valid
6069          */
6070         ies = rcu_dereference(res->ies);
6071         if (ies) {
6072                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6073                         goto fail_unlock_rcu;
6074                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6075                                         ies->len, ies->data))
6076                         goto fail_unlock_rcu;
6077         }
6078
6079         /* and this pointer is always (unless driver didn't know) beacon data */
6080         ies = rcu_dereference(res->beacon_ies);
6081         if (ies && ies->from_beacon) {
6082                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6083                         goto fail_unlock_rcu;
6084                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6085                                         ies->len, ies->data))
6086                         goto fail_unlock_rcu;
6087         }
6088         rcu_read_unlock();
6089
6090         if (res->beacon_interval &&
6091             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6092                 goto nla_put_failure;
6093         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6094             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6095             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6096             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6097                         jiffies_to_msecs(jiffies - intbss->ts)))
6098                 goto nla_put_failure;
6099
6100         switch (rdev->wiphy.signal_type) {
6101         case CFG80211_SIGNAL_TYPE_MBM:
6102                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6103                         goto nla_put_failure;
6104                 break;
6105         case CFG80211_SIGNAL_TYPE_UNSPEC:
6106                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6107                         goto nla_put_failure;
6108                 break;
6109         default:
6110                 break;
6111         }
6112
6113         switch (wdev->iftype) {
6114         case NL80211_IFTYPE_P2P_CLIENT:
6115         case NL80211_IFTYPE_STATION:
6116                 if (intbss == wdev->current_bss &&
6117                     nla_put_u32(msg, NL80211_BSS_STATUS,
6118                                 NL80211_BSS_STATUS_ASSOCIATED))
6119                         goto nla_put_failure;
6120                 break;
6121         case NL80211_IFTYPE_ADHOC:
6122                 if (intbss == wdev->current_bss &&
6123                     nla_put_u32(msg, NL80211_BSS_STATUS,
6124                                 NL80211_BSS_STATUS_IBSS_JOINED))
6125                         goto nla_put_failure;
6126                 break;
6127         default:
6128                 break;
6129         }
6130
6131         nla_nest_end(msg, bss);
6132
6133         return genlmsg_end(msg, hdr);
6134
6135  fail_unlock_rcu:
6136         rcu_read_unlock();
6137  nla_put_failure:
6138         genlmsg_cancel(msg, hdr);
6139         return -EMSGSIZE;
6140 }
6141
6142 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6143 {
6144         struct cfg80211_registered_device *rdev;
6145         struct cfg80211_internal_bss *scan;
6146         struct wireless_dev *wdev;
6147         int start = cb->args[2], idx = 0;
6148         int err;
6149
6150         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6151         if (err)
6152                 return err;
6153
6154         wdev_lock(wdev);
6155         spin_lock_bh(&rdev->bss_lock);
6156         cfg80211_bss_expire(rdev);
6157
6158         cb->seq = rdev->bss_generation;
6159
6160         list_for_each_entry(scan, &rdev->bss_list, list) {
6161                 if (++idx <= start)
6162                         continue;
6163                 if (nl80211_send_bss(skb, cb,
6164                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6165                                 rdev, wdev, scan) < 0) {
6166                         idx--;
6167                         break;
6168                 }
6169         }
6170
6171         spin_unlock_bh(&rdev->bss_lock);
6172         wdev_unlock(wdev);
6173
6174         cb->args[2] = idx;
6175         nl80211_finish_wdev_dump(rdev);
6176
6177         return skb->len;
6178 }
6179
6180 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6181                                 int flags, struct net_device *dev,
6182                                 struct survey_info *survey)
6183 {
6184         void *hdr;
6185         struct nlattr *infoattr;
6186
6187         hdr = nl80211hdr_put(msg, portid, seq, flags,
6188                              NL80211_CMD_NEW_SURVEY_RESULTS);
6189         if (!hdr)
6190                 return -ENOMEM;
6191
6192         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6193                 goto nla_put_failure;
6194
6195         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6196         if (!infoattr)
6197                 goto nla_put_failure;
6198
6199         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6200                         survey->channel->center_freq))
6201                 goto nla_put_failure;
6202
6203         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6204             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6205                 goto nla_put_failure;
6206         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6207             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6208                 goto nla_put_failure;
6209         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6210             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6211                         survey->channel_time))
6212                 goto nla_put_failure;
6213         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6214             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6215                         survey->channel_time_busy))
6216                 goto nla_put_failure;
6217         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6218             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6219                         survey->channel_time_ext_busy))
6220                 goto nla_put_failure;
6221         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6222             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6223                         survey->channel_time_rx))
6224                 goto nla_put_failure;
6225         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6226             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6227                         survey->channel_time_tx))
6228                 goto nla_put_failure;
6229
6230         nla_nest_end(msg, infoattr);
6231
6232         return genlmsg_end(msg, hdr);
6233
6234  nla_put_failure:
6235         genlmsg_cancel(msg, hdr);
6236         return -EMSGSIZE;
6237 }
6238
6239 static int nl80211_dump_survey(struct sk_buff *skb,
6240                         struct netlink_callback *cb)
6241 {
6242         struct survey_info survey;
6243         struct cfg80211_registered_device *rdev;
6244         struct wireless_dev *wdev;
6245         int survey_idx = cb->args[2];
6246         int res;
6247
6248         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6249         if (res)
6250                 return res;
6251
6252         if (!wdev->netdev) {
6253                 res = -EINVAL;
6254                 goto out_err;
6255         }
6256
6257         if (!rdev->ops->dump_survey) {
6258                 res = -EOPNOTSUPP;
6259                 goto out_err;
6260         }
6261
6262         while (1) {
6263                 struct ieee80211_channel *chan;
6264
6265                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6266                 if (res == -ENOENT)
6267                         break;
6268                 if (res)
6269                         goto out_err;
6270
6271                 /* Survey without a channel doesn't make sense */
6272                 if (!survey.channel) {
6273                         res = -EINVAL;
6274                         goto out;
6275                 }
6276
6277                 chan = ieee80211_get_channel(&rdev->wiphy,
6278                                              survey.channel->center_freq);
6279                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6280                         survey_idx++;
6281                         continue;
6282                 }
6283
6284                 if (nl80211_send_survey(skb,
6285                                 NETLINK_CB(cb->skb).portid,
6286                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6287                                 wdev->netdev, &survey) < 0)
6288                         goto out;
6289                 survey_idx++;
6290         }
6291
6292  out:
6293         cb->args[2] = survey_idx;
6294         res = skb->len;
6295  out_err:
6296         nl80211_finish_wdev_dump(rdev);
6297         return res;
6298 }
6299
6300 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6301 {
6302         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6303                                   NL80211_WPA_VERSION_2));
6304 }
6305
6306 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6307 {
6308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6309         struct net_device *dev = info->user_ptr[1];
6310         struct ieee80211_channel *chan;
6311         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6312         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6313         enum nl80211_auth_type auth_type;
6314         struct key_parse key;
6315         bool local_state_change;
6316
6317         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6318                 return -EINVAL;
6319
6320         if (!info->attrs[NL80211_ATTR_MAC])
6321                 return -EINVAL;
6322
6323         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6324                 return -EINVAL;
6325
6326         if (!info->attrs[NL80211_ATTR_SSID])
6327                 return -EINVAL;
6328
6329         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6330                 return -EINVAL;
6331
6332         err = nl80211_parse_key(info, &key);
6333         if (err)
6334                 return err;
6335
6336         if (key.idx >= 0) {
6337                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6338                         return -EINVAL;
6339                 if (!key.p.key || !key.p.key_len)
6340                         return -EINVAL;
6341                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6342                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6343                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6344                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6345                         return -EINVAL;
6346                 if (key.idx > 4)
6347                         return -EINVAL;
6348         } else {
6349                 key.p.key_len = 0;
6350                 key.p.key = NULL;
6351         }
6352
6353         if (key.idx >= 0) {
6354                 int i;
6355                 bool ok = false;
6356                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6357                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6358                                 ok = true;
6359                                 break;
6360                         }
6361                 }
6362                 if (!ok)
6363                         return -EINVAL;
6364         }
6365
6366         if (!rdev->ops->auth)
6367                 return -EOPNOTSUPP;
6368
6369         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6370             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6371                 return -EOPNOTSUPP;
6372
6373         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6374         chan = nl80211_get_valid_chan(&rdev->wiphy,
6375                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6376         if (!chan)
6377                 return -EINVAL;
6378
6379         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6380         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6381
6382         if (info->attrs[NL80211_ATTR_IE]) {
6383                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6384                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6385         }
6386
6387         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6388         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6389                 return -EINVAL;
6390
6391         if (auth_type == NL80211_AUTHTYPE_SAE &&
6392             !info->attrs[NL80211_ATTR_SAE_DATA])
6393                 return -EINVAL;
6394
6395         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6396                 if (auth_type != NL80211_AUTHTYPE_SAE)
6397                         return -EINVAL;
6398                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6399                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6400                 /* need to include at least Auth Transaction and Status Code */
6401                 if (sae_data_len < 4)
6402                         return -EINVAL;
6403         }
6404
6405         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6406
6407         /*
6408          * Since we no longer track auth state, ignore
6409          * requests to only change local state.
6410          */
6411         if (local_state_change)
6412                 return 0;
6413
6414         wdev_lock(dev->ieee80211_ptr);
6415         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6416                                  ssid, ssid_len, ie, ie_len,
6417                                  key.p.key, key.p.key_len, key.idx,
6418                                  sae_data, sae_data_len);
6419         wdev_unlock(dev->ieee80211_ptr);
6420         return err;
6421 }
6422
6423 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6424                                    struct genl_info *info,
6425                                    struct cfg80211_crypto_settings *settings,
6426                                    int cipher_limit)
6427 {
6428         memset(settings, 0, sizeof(*settings));
6429
6430         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6431
6432         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6433                 u16 proto;
6434                 proto = nla_get_u16(
6435                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6436                 settings->control_port_ethertype = cpu_to_be16(proto);
6437                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6438                     proto != ETH_P_PAE)
6439                         return -EINVAL;
6440                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6441                         settings->control_port_no_encrypt = true;
6442         } else
6443                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6444
6445         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6446                 void *data;
6447                 int len, i;
6448
6449                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6450                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6451                 settings->n_ciphers_pairwise = len / sizeof(u32);
6452
6453                 if (len % sizeof(u32))
6454                         return -EINVAL;
6455
6456                 if (settings->n_ciphers_pairwise > cipher_limit)
6457                         return -EINVAL;
6458
6459                 memcpy(settings->ciphers_pairwise, data, len);
6460
6461                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6462                         if (!cfg80211_supported_cipher_suite(
6463                                         &rdev->wiphy,
6464                                         settings->ciphers_pairwise[i]))
6465                                 return -EINVAL;
6466         }
6467
6468         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6469                 settings->cipher_group =
6470                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6471                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6472                                                      settings->cipher_group))
6473                         return -EINVAL;
6474         }
6475
6476         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6477                 settings->wpa_versions =
6478                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6479                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6480                         return -EINVAL;
6481         }
6482
6483         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6484                 void *data;
6485                 int len;
6486
6487                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6488                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6489                 settings->n_akm_suites = len / sizeof(u32);
6490
6491                 if (len % sizeof(u32))
6492                         return -EINVAL;
6493
6494                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6495                         return -EINVAL;
6496
6497                 memcpy(settings->akm_suites, data, len);
6498         }
6499
6500         return 0;
6501 }
6502
6503 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6504 {
6505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6506         struct net_device *dev = info->user_ptr[1];
6507         struct ieee80211_channel *chan;
6508         struct cfg80211_assoc_request req = {};
6509         const u8 *bssid, *ssid;
6510         int err, ssid_len = 0;
6511
6512         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6513                 return -EINVAL;
6514
6515         if (!info->attrs[NL80211_ATTR_MAC] ||
6516             !info->attrs[NL80211_ATTR_SSID] ||
6517             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6518                 return -EINVAL;
6519
6520         if (!rdev->ops->assoc)
6521                 return -EOPNOTSUPP;
6522
6523         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6524             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6525                 return -EOPNOTSUPP;
6526
6527         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6528
6529         chan = nl80211_get_valid_chan(&rdev->wiphy,
6530                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6531         if (!chan)
6532                 return -EINVAL;
6533
6534         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6535         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6536
6537         if (info->attrs[NL80211_ATTR_IE]) {
6538                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6539                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6540         }
6541
6542         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6543                 enum nl80211_mfp mfp =
6544                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6545                 if (mfp == NL80211_MFP_REQUIRED)
6546                         req.use_mfp = true;
6547                 else if (mfp != NL80211_MFP_NO)
6548                         return -EINVAL;
6549         }
6550
6551         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6552                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6553
6554         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6555                 req.flags |= ASSOC_REQ_DISABLE_HT;
6556
6557         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6558                 memcpy(&req.ht_capa_mask,
6559                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6560                        sizeof(req.ht_capa_mask));
6561
6562         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6563                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6564                         return -EINVAL;
6565                 memcpy(&req.ht_capa,
6566                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6567                        sizeof(req.ht_capa));
6568         }
6569
6570         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6571                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6572
6573         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6574                 memcpy(&req.vht_capa_mask,
6575                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6576                        sizeof(req.vht_capa_mask));
6577
6578         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6579                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6580                         return -EINVAL;
6581                 memcpy(&req.vht_capa,
6582                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6583                        sizeof(req.vht_capa));
6584         }
6585
6586         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6587         if (!err) {
6588                 wdev_lock(dev->ieee80211_ptr);
6589                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6590                                           ssid, ssid_len, &req);
6591                 wdev_unlock(dev->ieee80211_ptr);
6592         }
6593
6594         return err;
6595 }
6596
6597 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6598 {
6599         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6600         struct net_device *dev = info->user_ptr[1];
6601         const u8 *ie = NULL, *bssid;
6602         int ie_len = 0, err;
6603         u16 reason_code;
6604         bool local_state_change;
6605
6606         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6607                 return -EINVAL;
6608
6609         if (!info->attrs[NL80211_ATTR_MAC])
6610                 return -EINVAL;
6611
6612         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6613                 return -EINVAL;
6614
6615         if (!rdev->ops->deauth)
6616                 return -EOPNOTSUPP;
6617
6618         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6619             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6620                 return -EOPNOTSUPP;
6621
6622         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6623
6624         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6625         if (reason_code == 0) {
6626                 /* Reason Code 0 is reserved */
6627                 return -EINVAL;
6628         }
6629
6630         if (info->attrs[NL80211_ATTR_IE]) {
6631                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6632                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6633         }
6634
6635         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6636
6637         wdev_lock(dev->ieee80211_ptr);
6638         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6639                                    local_state_change);
6640         wdev_unlock(dev->ieee80211_ptr);
6641         return err;
6642 }
6643
6644 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6645 {
6646         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6647         struct net_device *dev = info->user_ptr[1];
6648         const u8 *ie = NULL, *bssid;
6649         int ie_len = 0, err;
6650         u16 reason_code;
6651         bool local_state_change;
6652
6653         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6654                 return -EINVAL;
6655
6656         if (!info->attrs[NL80211_ATTR_MAC])
6657                 return -EINVAL;
6658
6659         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6660                 return -EINVAL;
6661
6662         if (!rdev->ops->disassoc)
6663                 return -EOPNOTSUPP;
6664
6665         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6666             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6667                 return -EOPNOTSUPP;
6668
6669         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6670
6671         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6672         if (reason_code == 0) {
6673                 /* Reason Code 0 is reserved */
6674                 return -EINVAL;
6675         }
6676
6677         if (info->attrs[NL80211_ATTR_IE]) {
6678                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6679                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6680         }
6681
6682         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6683
6684         wdev_lock(dev->ieee80211_ptr);
6685         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6686                                      local_state_change);
6687         wdev_unlock(dev->ieee80211_ptr);
6688         return err;
6689 }
6690
6691 static bool
6692 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6693                          int mcast_rate[IEEE80211_NUM_BANDS],
6694                          int rateval)
6695 {
6696         struct wiphy *wiphy = &rdev->wiphy;
6697         bool found = false;
6698         int band, i;
6699
6700         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6701                 struct ieee80211_supported_band *sband;
6702
6703                 sband = wiphy->bands[band];
6704                 if (!sband)
6705                         continue;
6706
6707                 for (i = 0; i < sband->n_bitrates; i++) {
6708                         if (sband->bitrates[i].bitrate == rateval) {
6709                                 mcast_rate[band] = i + 1;
6710                                 found = true;
6711                                 break;
6712                         }
6713                 }
6714         }
6715
6716         return found;
6717 }
6718
6719 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6720 {
6721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6722         struct net_device *dev = info->user_ptr[1];
6723         struct cfg80211_ibss_params ibss;
6724         struct wiphy *wiphy;
6725         struct cfg80211_cached_keys *connkeys = NULL;
6726         int err;
6727
6728         memset(&ibss, 0, sizeof(ibss));
6729
6730         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6731                 return -EINVAL;
6732
6733         if (!info->attrs[NL80211_ATTR_SSID] ||
6734             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6735                 return -EINVAL;
6736
6737         ibss.beacon_interval = 100;
6738
6739         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6740                 ibss.beacon_interval =
6741                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6742                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6743                         return -EINVAL;
6744         }
6745
6746         if (!rdev->ops->join_ibss)
6747                 return -EOPNOTSUPP;
6748
6749         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6750                 return -EOPNOTSUPP;
6751
6752         wiphy = &rdev->wiphy;
6753
6754         if (info->attrs[NL80211_ATTR_MAC]) {
6755                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6756
6757                 if (!is_valid_ether_addr(ibss.bssid))
6758                         return -EINVAL;
6759         }
6760         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6761         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6762
6763         if (info->attrs[NL80211_ATTR_IE]) {
6764                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6765                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6766         }
6767
6768         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6769         if (err)
6770                 return err;
6771
6772         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
6773                                      NL80211_IFTYPE_ADHOC))
6774                 return -EINVAL;
6775
6776         switch (ibss.chandef.width) {
6777         case NL80211_CHAN_WIDTH_5:
6778         case NL80211_CHAN_WIDTH_10:
6779         case NL80211_CHAN_WIDTH_20_NOHT:
6780                 break;
6781         case NL80211_CHAN_WIDTH_20:
6782         case NL80211_CHAN_WIDTH_40:
6783                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6784                         break;
6785         default:
6786                 return -EINVAL;
6787         }
6788
6789         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6790         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6791
6792         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6793                 u8 *rates =
6794                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6795                 int n_rates =
6796                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6797                 struct ieee80211_supported_band *sband =
6798                         wiphy->bands[ibss.chandef.chan->band];
6799
6800                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6801                                              &ibss.basic_rates);
6802                 if (err)
6803                         return err;
6804         }
6805
6806         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6807                 memcpy(&ibss.ht_capa_mask,
6808                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6809                        sizeof(ibss.ht_capa_mask));
6810
6811         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6812                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6813                         return -EINVAL;
6814                 memcpy(&ibss.ht_capa,
6815                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6816                        sizeof(ibss.ht_capa));
6817         }
6818
6819         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6820             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6821                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6822                 return -EINVAL;
6823
6824         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6825                 bool no_ht = false;
6826
6827                 connkeys = nl80211_parse_connkeys(rdev,
6828                                           info->attrs[NL80211_ATTR_KEYS],
6829                                           &no_ht);
6830                 if (IS_ERR(connkeys))
6831                         return PTR_ERR(connkeys);
6832
6833                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6834                     no_ht) {
6835                         kfree(connkeys);
6836                         return -EINVAL;
6837                 }
6838         }
6839
6840         ibss.control_port =
6841                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6842
6843         ibss.userspace_handles_dfs =
6844                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6845
6846         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6847         if (err)
6848                 kfree(connkeys);
6849         return err;
6850 }
6851
6852 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6853 {
6854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6855         struct net_device *dev = info->user_ptr[1];
6856
6857         if (!rdev->ops->leave_ibss)
6858                 return -EOPNOTSUPP;
6859
6860         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6861                 return -EOPNOTSUPP;
6862
6863         return cfg80211_leave_ibss(rdev, dev, false);
6864 }
6865
6866 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6867 {
6868         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6869         struct net_device *dev = info->user_ptr[1];
6870         int mcast_rate[IEEE80211_NUM_BANDS];
6871         u32 nla_rate;
6872         int err;
6873
6874         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6875             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6876                 return -EOPNOTSUPP;
6877
6878         if (!rdev->ops->set_mcast_rate)
6879                 return -EOPNOTSUPP;
6880
6881         memset(mcast_rate, 0, sizeof(mcast_rate));
6882
6883         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6884                 return -EINVAL;
6885
6886         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6887         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6888                 return -EINVAL;
6889
6890         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6891
6892         return err;
6893 }
6894
6895 static struct sk_buff *
6896 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
6897                             int approxlen, u32 portid, u32 seq,
6898                             enum nl80211_commands cmd,
6899                             enum nl80211_attrs attr,
6900                             const struct nl80211_vendor_cmd_info *info,
6901                             gfp_t gfp)
6902 {
6903         struct sk_buff *skb;
6904         void *hdr;
6905         struct nlattr *data;
6906
6907         skb = nlmsg_new(approxlen + 100, gfp);
6908         if (!skb)
6909                 return NULL;
6910
6911         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
6912         if (!hdr) {
6913                 kfree_skb(skb);
6914                 return NULL;
6915         }
6916
6917         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6918                 goto nla_put_failure;
6919
6920         if (info) {
6921                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
6922                                 info->vendor_id))
6923                         goto nla_put_failure;
6924                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
6925                                 info->subcmd))
6926                         goto nla_put_failure;
6927         }
6928
6929         data = nla_nest_start(skb, attr);
6930
6931         ((void **)skb->cb)[0] = rdev;
6932         ((void **)skb->cb)[1] = hdr;
6933         ((void **)skb->cb)[2] = data;
6934
6935         return skb;
6936
6937  nla_put_failure:
6938         kfree_skb(skb);
6939         return NULL;
6940 }
6941
6942 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
6943                                            enum nl80211_commands cmd,
6944                                            enum nl80211_attrs attr,
6945                                            int vendor_event_idx,
6946                                            int approxlen, gfp_t gfp)
6947 {
6948         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
6949         const struct nl80211_vendor_cmd_info *info;
6950
6951         switch (cmd) {
6952         case NL80211_CMD_TESTMODE:
6953                 if (WARN_ON(vendor_event_idx != -1))
6954                         return NULL;
6955                 info = NULL;
6956                 break;
6957         case NL80211_CMD_VENDOR:
6958                 if (WARN_ON(vendor_event_idx < 0 ||
6959                             vendor_event_idx >= wiphy->n_vendor_events))
6960                         return NULL;
6961                 info = &wiphy->vendor_events[vendor_event_idx];
6962                 break;
6963         default:
6964                 WARN_ON(1);
6965                 return NULL;
6966         }
6967
6968         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
6969                                            cmd, attr, info, gfp);
6970 }
6971 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
6972
6973 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
6974 {
6975         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6976         void *hdr = ((void **)skb->cb)[1];
6977         struct nlattr *data = ((void **)skb->cb)[2];
6978         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
6979
6980         /* clear CB data for netlink core to own from now on */
6981         memset(skb->cb, 0, sizeof(skb->cb));
6982
6983         nla_nest_end(skb, data);
6984         genlmsg_end(skb, hdr);
6985
6986         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
6987                 mcgrp = NL80211_MCGRP_VENDOR;
6988
6989         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
6990                                 mcgrp, gfp);
6991 }
6992 EXPORT_SYMBOL(__cfg80211_send_event_skb);
6993
6994 #ifdef CONFIG_NL80211_TESTMODE
6995 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6996 {
6997         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6998         struct wireless_dev *wdev =
6999                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7000         int err;
7001
7002         if (!rdev->ops->testmode_cmd)
7003                 return -EOPNOTSUPP;
7004
7005         if (IS_ERR(wdev)) {
7006                 err = PTR_ERR(wdev);
7007                 if (err != -EINVAL)
7008                         return err;
7009                 wdev = NULL;
7010         } else if (wdev->wiphy != &rdev->wiphy) {
7011                 return -EINVAL;
7012         }
7013
7014         if (!info->attrs[NL80211_ATTR_TESTDATA])
7015                 return -EINVAL;
7016
7017         rdev->cur_cmd_info = info;
7018         err = rdev_testmode_cmd(rdev, wdev,
7019                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7020                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7021         rdev->cur_cmd_info = NULL;
7022
7023         return err;
7024 }
7025
7026 static int nl80211_testmode_dump(struct sk_buff *skb,
7027                                  struct netlink_callback *cb)
7028 {
7029         struct cfg80211_registered_device *rdev;
7030         int err;
7031         long phy_idx;
7032         void *data = NULL;
7033         int data_len = 0;
7034
7035         rtnl_lock();
7036
7037         if (cb->args[0]) {
7038                 /*
7039                  * 0 is a valid index, but not valid for args[0],
7040                  * so we need to offset by 1.
7041                  */
7042                 phy_idx = cb->args[0] - 1;
7043         } else {
7044                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7045                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7046                                   nl80211_policy);
7047                 if (err)
7048                         goto out_err;
7049
7050                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7051                                                   nl80211_fam.attrbuf);
7052                 if (IS_ERR(rdev)) {
7053                         err = PTR_ERR(rdev);
7054                         goto out_err;
7055                 }
7056                 phy_idx = rdev->wiphy_idx;
7057                 rdev = NULL;
7058
7059                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7060                         cb->args[1] =
7061                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7062         }
7063
7064         if (cb->args[1]) {
7065                 data = nla_data((void *)cb->args[1]);
7066                 data_len = nla_len((void *)cb->args[1]);
7067         }
7068
7069         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7070         if (!rdev) {
7071                 err = -ENOENT;
7072                 goto out_err;
7073         }
7074
7075         if (!rdev->ops->testmode_dump) {
7076                 err = -EOPNOTSUPP;
7077                 goto out_err;
7078         }
7079
7080         while (1) {
7081                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7082                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7083                                            NL80211_CMD_TESTMODE);
7084                 struct nlattr *tmdata;
7085
7086                 if (!hdr)
7087                         break;
7088
7089                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7090                         genlmsg_cancel(skb, hdr);
7091                         break;
7092                 }
7093
7094                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7095                 if (!tmdata) {
7096                         genlmsg_cancel(skb, hdr);
7097                         break;
7098                 }
7099                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7100                 nla_nest_end(skb, tmdata);
7101
7102                 if (err == -ENOBUFS || err == -ENOENT) {
7103                         genlmsg_cancel(skb, hdr);
7104                         break;
7105                 } else if (err) {
7106                         genlmsg_cancel(skb, hdr);
7107                         goto out_err;
7108                 }
7109
7110                 genlmsg_end(skb, hdr);
7111         }
7112
7113         err = skb->len;
7114         /* see above */
7115         cb->args[0] = phy_idx + 1;
7116  out_err:
7117         rtnl_unlock();
7118         return err;
7119 }
7120 #endif
7121
7122 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7123 {
7124         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7125         struct net_device *dev = info->user_ptr[1];
7126         struct cfg80211_connect_params connect;
7127         struct wiphy *wiphy;
7128         struct cfg80211_cached_keys *connkeys = NULL;
7129         int err;
7130
7131         memset(&connect, 0, sizeof(connect));
7132
7133         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7134                 return -EINVAL;
7135
7136         if (!info->attrs[NL80211_ATTR_SSID] ||
7137             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7138                 return -EINVAL;
7139
7140         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7141                 connect.auth_type =
7142                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7143                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7144                                              NL80211_CMD_CONNECT))
7145                         return -EINVAL;
7146         } else
7147                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7148
7149         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7150
7151         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7152                                       NL80211_MAX_NR_CIPHER_SUITES);
7153         if (err)
7154                 return err;
7155
7156         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7157             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7158                 return -EOPNOTSUPP;
7159
7160         wiphy = &rdev->wiphy;
7161
7162         connect.bg_scan_period = -1;
7163         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7164                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7165                 connect.bg_scan_period =
7166                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7167         }
7168
7169         if (info->attrs[NL80211_ATTR_MAC])
7170                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7171         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7172                 connect.bssid_hint =
7173                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7174         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7175         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7176
7177         if (info->attrs[NL80211_ATTR_IE]) {
7178                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7179                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7180         }
7181
7182         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7183                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7184                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7185                     connect.mfp != NL80211_MFP_NO)
7186                         return -EINVAL;
7187         } else {
7188                 connect.mfp = NL80211_MFP_NO;
7189         }
7190
7191         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7192                 connect.channel = nl80211_get_valid_chan(
7193                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7194                 if (!connect.channel)
7195                         return -EINVAL;
7196         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7197                 connect.channel_hint = nl80211_get_valid_chan(
7198                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7199                 if (!connect.channel_hint)
7200                         return -EINVAL;
7201         }
7202
7203         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7204                 connkeys = nl80211_parse_connkeys(rdev,
7205                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7206                 if (IS_ERR(connkeys))
7207                         return PTR_ERR(connkeys);
7208         }
7209
7210         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7211                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7212
7213         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7214                 memcpy(&connect.ht_capa_mask,
7215                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7216                        sizeof(connect.ht_capa_mask));
7217
7218         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7219                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7220                         kfree(connkeys);
7221                         return -EINVAL;
7222                 }
7223                 memcpy(&connect.ht_capa,
7224                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7225                        sizeof(connect.ht_capa));
7226         }
7227
7228         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7229                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7230
7231         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7232                 memcpy(&connect.vht_capa_mask,
7233                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7234                        sizeof(connect.vht_capa_mask));
7235
7236         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7237                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7238                         kfree(connkeys);
7239                         return -EINVAL;
7240                 }
7241                 memcpy(&connect.vht_capa,
7242                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7243                        sizeof(connect.vht_capa));
7244         }
7245
7246         wdev_lock(dev->ieee80211_ptr);
7247         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7248         wdev_unlock(dev->ieee80211_ptr);
7249         if (err)
7250                 kfree(connkeys);
7251         return err;
7252 }
7253
7254 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7255 {
7256         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7257         struct net_device *dev = info->user_ptr[1];
7258         u16 reason;
7259         int ret;
7260
7261         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7262                 reason = WLAN_REASON_DEAUTH_LEAVING;
7263         else
7264                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7265
7266         if (reason == 0)
7267                 return -EINVAL;
7268
7269         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7270             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7271                 return -EOPNOTSUPP;
7272
7273         wdev_lock(dev->ieee80211_ptr);
7274         ret = cfg80211_disconnect(rdev, dev, reason, true);
7275         wdev_unlock(dev->ieee80211_ptr);
7276         return ret;
7277 }
7278
7279 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7280 {
7281         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7282         struct net *net;
7283         int err;
7284         u32 pid;
7285
7286         if (!info->attrs[NL80211_ATTR_PID])
7287                 return -EINVAL;
7288
7289         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7290
7291         net = get_net_ns_by_pid(pid);
7292         if (IS_ERR(net))
7293                 return PTR_ERR(net);
7294
7295         err = 0;
7296
7297         /* check if anything to do */
7298         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7299                 err = cfg80211_switch_netns(rdev, net);
7300
7301         put_net(net);
7302         return err;
7303 }
7304
7305 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7306 {
7307         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7308         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7309                         struct cfg80211_pmksa *pmksa) = NULL;
7310         struct net_device *dev = info->user_ptr[1];
7311         struct cfg80211_pmksa pmksa;
7312
7313         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7314
7315         if (!info->attrs[NL80211_ATTR_MAC])
7316                 return -EINVAL;
7317
7318         if (!info->attrs[NL80211_ATTR_PMKID])
7319                 return -EINVAL;
7320
7321         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7322         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7323
7324         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7325             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7326                 return -EOPNOTSUPP;
7327
7328         switch (info->genlhdr->cmd) {
7329         case NL80211_CMD_SET_PMKSA:
7330                 rdev_ops = rdev->ops->set_pmksa;
7331                 break;
7332         case NL80211_CMD_DEL_PMKSA:
7333                 rdev_ops = rdev->ops->del_pmksa;
7334                 break;
7335         default:
7336                 WARN_ON(1);
7337                 break;
7338         }
7339
7340         if (!rdev_ops)
7341                 return -EOPNOTSUPP;
7342
7343         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7344 }
7345
7346 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7347 {
7348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7349         struct net_device *dev = info->user_ptr[1];
7350
7351         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7352             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7353                 return -EOPNOTSUPP;
7354
7355         if (!rdev->ops->flush_pmksa)
7356                 return -EOPNOTSUPP;
7357
7358         return rdev_flush_pmksa(rdev, dev);
7359 }
7360
7361 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7362 {
7363         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7364         struct net_device *dev = info->user_ptr[1];
7365         u8 action_code, dialog_token;
7366         u32 peer_capability = 0;
7367         u16 status_code;
7368         u8 *peer;
7369         bool initiator;
7370
7371         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7372             !rdev->ops->tdls_mgmt)
7373                 return -EOPNOTSUPP;
7374
7375         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7376             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7377             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7378             !info->attrs[NL80211_ATTR_IE] ||
7379             !info->attrs[NL80211_ATTR_MAC])
7380                 return -EINVAL;
7381
7382         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7383         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7384         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7385         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7386         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
7387         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
7388                 peer_capability =
7389                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
7390
7391         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7392                               dialog_token, status_code, peer_capability,
7393                               initiator,
7394                               nla_data(info->attrs[NL80211_ATTR_IE]),
7395                               nla_len(info->attrs[NL80211_ATTR_IE]));
7396 }
7397
7398 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7399 {
7400         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7401         struct net_device *dev = info->user_ptr[1];
7402         enum nl80211_tdls_operation operation;
7403         u8 *peer;
7404
7405         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7406             !rdev->ops->tdls_oper)
7407                 return -EOPNOTSUPP;
7408
7409         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7410             !info->attrs[NL80211_ATTR_MAC])
7411                 return -EINVAL;
7412
7413         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7414         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7415
7416         return rdev_tdls_oper(rdev, dev, peer, operation);
7417 }
7418
7419 static int nl80211_remain_on_channel(struct sk_buff *skb,
7420                                      struct genl_info *info)
7421 {
7422         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7423         struct wireless_dev *wdev = info->user_ptr[1];
7424         struct cfg80211_chan_def chandef;
7425         struct sk_buff *msg;
7426         void *hdr;
7427         u64 cookie;
7428         u32 duration;
7429         int err;
7430
7431         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7432             !info->attrs[NL80211_ATTR_DURATION])
7433                 return -EINVAL;
7434
7435         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7436
7437         if (!rdev->ops->remain_on_channel ||
7438             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7439                 return -EOPNOTSUPP;
7440
7441         /*
7442          * We should be on that channel for at least a minimum amount of
7443          * time (10ms) but no longer than the driver supports.
7444          */
7445         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7446             duration > rdev->wiphy.max_remain_on_channel_duration)
7447                 return -EINVAL;
7448
7449         err = nl80211_parse_chandef(rdev, info, &chandef);
7450         if (err)
7451                 return err;
7452
7453         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7454         if (!msg)
7455                 return -ENOMEM;
7456
7457         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7458                              NL80211_CMD_REMAIN_ON_CHANNEL);
7459         if (!hdr) {
7460                 err = -ENOBUFS;
7461                 goto free_msg;
7462         }
7463
7464         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7465                                      duration, &cookie);
7466
7467         if (err)
7468                 goto free_msg;
7469
7470         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7471                 goto nla_put_failure;
7472
7473         genlmsg_end(msg, hdr);
7474
7475         return genlmsg_reply(msg, info);
7476
7477  nla_put_failure:
7478         err = -ENOBUFS;
7479  free_msg:
7480         nlmsg_free(msg);
7481         return err;
7482 }
7483
7484 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7485                                             struct genl_info *info)
7486 {
7487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7488         struct wireless_dev *wdev = info->user_ptr[1];
7489         u64 cookie;
7490
7491         if (!info->attrs[NL80211_ATTR_COOKIE])
7492                 return -EINVAL;
7493
7494         if (!rdev->ops->cancel_remain_on_channel)
7495                 return -EOPNOTSUPP;
7496
7497         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7498
7499         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7500 }
7501
7502 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7503                            u8 *rates, u8 rates_len)
7504 {
7505         u8 i;
7506         u32 mask = 0;
7507
7508         for (i = 0; i < rates_len; i++) {
7509                 int rate = (rates[i] & 0x7f) * 5;
7510                 int ridx;
7511                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7512                         struct ieee80211_rate *srate =
7513                                 &sband->bitrates[ridx];
7514                         if (rate == srate->bitrate) {
7515                                 mask |= 1 << ridx;
7516                                 break;
7517                         }
7518                 }
7519                 if (ridx == sband->n_bitrates)
7520                         return 0; /* rate not found */
7521         }
7522
7523         return mask;
7524 }
7525
7526 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7527                                u8 *rates, u8 rates_len,
7528                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7529 {
7530         u8 i;
7531
7532         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7533
7534         for (i = 0; i < rates_len; i++) {
7535                 int ridx, rbit;
7536
7537                 ridx = rates[i] / 8;
7538                 rbit = BIT(rates[i] % 8);
7539
7540                 /* check validity */
7541                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7542                         return false;
7543
7544                 /* check availability */
7545                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7546                         mcs[ridx] |= rbit;
7547                 else
7548                         return false;
7549         }
7550
7551         return true;
7552 }
7553
7554 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
7555 {
7556         u16 mcs_mask = 0;
7557
7558         switch (vht_mcs_map) {
7559         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
7560                 break;
7561         case IEEE80211_VHT_MCS_SUPPORT_0_7:
7562                 mcs_mask = 0x00FF;
7563                 break;
7564         case IEEE80211_VHT_MCS_SUPPORT_0_8:
7565                 mcs_mask = 0x01FF;
7566                 break;
7567         case IEEE80211_VHT_MCS_SUPPORT_0_9:
7568                 mcs_mask = 0x03FF;
7569                 break;
7570         default:
7571                 break;
7572         }
7573
7574         return mcs_mask;
7575 }
7576
7577 static void vht_build_mcs_mask(u16 vht_mcs_map,
7578                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
7579 {
7580         u8 nss;
7581
7582         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
7583                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
7584                 vht_mcs_map >>= 2;
7585         }
7586 }
7587
7588 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
7589                              struct nl80211_txrate_vht *txrate,
7590                              u16 mcs[NL80211_VHT_NSS_MAX])
7591 {
7592         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7593         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
7594         u8 i;
7595
7596         if (!sband->vht_cap.vht_supported)
7597                 return false;
7598
7599         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
7600
7601         /* Build vht_mcs_mask from VHT capabilities */
7602         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
7603
7604         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
7605                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
7606                         mcs[i] = txrate->mcs[i];
7607                 else
7608                         return false;
7609         }
7610
7611         return true;
7612 }
7613
7614 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7615         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7616                                     .len = NL80211_MAX_SUPP_RATES },
7617         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7618                                 .len = NL80211_MAX_SUPP_HT_RATES },
7619         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
7620         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
7621 };
7622
7623 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7624                                        struct genl_info *info)
7625 {
7626         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7627         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7628         struct cfg80211_bitrate_mask mask;
7629         int rem, i;
7630         struct net_device *dev = info->user_ptr[1];
7631         struct nlattr *tx_rates;
7632         struct ieee80211_supported_band *sband;
7633         u16 vht_tx_mcs_map;
7634
7635         if (!rdev->ops->set_bitrate_mask)
7636                 return -EOPNOTSUPP;
7637
7638         memset(&mask, 0, sizeof(mask));
7639         /* Default to all rates enabled */
7640         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7641                 sband = rdev->wiphy.bands[i];
7642
7643                 if (!sband)
7644                         continue;
7645
7646                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7647                 memcpy(mask.control[i].ht_mcs,
7648                        sband->ht_cap.mcs.rx_mask,
7649                        sizeof(mask.control[i].ht_mcs));
7650
7651                 if (!sband->vht_cap.vht_supported)
7652                         continue;
7653
7654                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7655                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
7656         }
7657
7658         /* if no rates are given set it back to the defaults */
7659         if (!info->attrs[NL80211_ATTR_TX_RATES])
7660                 goto out;
7661
7662         /*
7663          * The nested attribute uses enum nl80211_band as the index. This maps
7664          * directly to the enum ieee80211_band values used in cfg80211.
7665          */
7666         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7667         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
7668                 enum ieee80211_band band = nla_type(tx_rates);
7669                 int err;
7670
7671                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7672                         return -EINVAL;
7673                 sband = rdev->wiphy.bands[band];
7674                 if (sband == NULL)
7675                         return -EINVAL;
7676                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7677                                 nla_len(tx_rates), nl80211_txattr_policy);
7678                 if (err)
7679                         return err;
7680                 if (tb[NL80211_TXRATE_LEGACY]) {
7681                         mask.control[band].legacy = rateset_to_mask(
7682                                 sband,
7683                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7684                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7685                         if ((mask.control[band].legacy == 0) &&
7686                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7687                                 return -EINVAL;
7688                 }
7689                 if (tb[NL80211_TXRATE_HT]) {
7690                         if (!ht_rateset_to_mask(
7691                                         sband,
7692                                         nla_data(tb[NL80211_TXRATE_HT]),
7693                                         nla_len(tb[NL80211_TXRATE_HT]),
7694                                         mask.control[band].ht_mcs))
7695                                 return -EINVAL;
7696                 }
7697                 if (tb[NL80211_TXRATE_VHT]) {
7698                         if (!vht_set_mcs_mask(
7699                                         sband,
7700                                         nla_data(tb[NL80211_TXRATE_VHT]),
7701                                         mask.control[band].vht_mcs))
7702                                 return -EINVAL;
7703                 }
7704                 if (tb[NL80211_TXRATE_GI]) {
7705                         mask.control[band].gi =
7706                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
7707                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
7708                                 return -EINVAL;
7709                 }
7710
7711                 if (mask.control[band].legacy == 0) {
7712                         /* don't allow empty legacy rates if HT or VHT
7713                          * are not even supported.
7714                          */
7715                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
7716                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
7717                                 return -EINVAL;
7718
7719                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7720                                 if (mask.control[band].ht_mcs[i])
7721                                         goto out;
7722
7723                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
7724                                 if (mask.control[band].vht_mcs[i])
7725                                         goto out;
7726
7727                         /* legacy and mcs rates may not be both empty */
7728                         return -EINVAL;
7729                 }
7730         }
7731
7732 out:
7733         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7734 }
7735
7736 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7737 {
7738         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7739         struct wireless_dev *wdev = info->user_ptr[1];
7740         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7741
7742         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7743                 return -EINVAL;
7744
7745         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7746                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7747
7748         switch (wdev->iftype) {
7749         case NL80211_IFTYPE_STATION:
7750         case NL80211_IFTYPE_ADHOC:
7751         case NL80211_IFTYPE_P2P_CLIENT:
7752         case NL80211_IFTYPE_AP:
7753         case NL80211_IFTYPE_AP_VLAN:
7754         case NL80211_IFTYPE_MESH_POINT:
7755         case NL80211_IFTYPE_P2P_GO:
7756         case NL80211_IFTYPE_P2P_DEVICE:
7757                 break;
7758         default:
7759                 return -EOPNOTSUPP;
7760         }
7761
7762         /* not much point in registering if we can't reply */
7763         if (!rdev->ops->mgmt_tx)
7764                 return -EOPNOTSUPP;
7765
7766         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7767                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7768                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7769 }
7770
7771 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7772 {
7773         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7774         struct wireless_dev *wdev = info->user_ptr[1];
7775         struct cfg80211_chan_def chandef;
7776         int err;
7777         void *hdr = NULL;
7778         u64 cookie;
7779         struct sk_buff *msg = NULL;
7780         struct cfg80211_mgmt_tx_params params = {
7781                 .dont_wait_for_ack =
7782                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7783         };
7784
7785         if (!info->attrs[NL80211_ATTR_FRAME])
7786                 return -EINVAL;
7787
7788         if (!rdev->ops->mgmt_tx)
7789                 return -EOPNOTSUPP;
7790
7791         switch (wdev->iftype) {
7792         case NL80211_IFTYPE_P2P_DEVICE:
7793                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7794                         return -EINVAL;
7795         case NL80211_IFTYPE_STATION:
7796         case NL80211_IFTYPE_ADHOC:
7797         case NL80211_IFTYPE_P2P_CLIENT:
7798         case NL80211_IFTYPE_AP:
7799         case NL80211_IFTYPE_AP_VLAN:
7800         case NL80211_IFTYPE_MESH_POINT:
7801         case NL80211_IFTYPE_P2P_GO:
7802                 break;
7803         default:
7804                 return -EOPNOTSUPP;
7805         }
7806
7807         if (info->attrs[NL80211_ATTR_DURATION]) {
7808                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7809                         return -EINVAL;
7810                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7811
7812                 /*
7813                  * We should wait on the channel for at least a minimum amount
7814                  * of time (10ms) but no longer than the driver supports.
7815                  */
7816                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7817                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7818                         return -EINVAL;
7819
7820         }
7821
7822         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7823
7824         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7825                 return -EINVAL;
7826
7827         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7828
7829         /* get the channel if any has been specified, otherwise pass NULL to
7830          * the driver. The latter will use the current one
7831          */
7832         chandef.chan = NULL;
7833         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7834                 err = nl80211_parse_chandef(rdev, info, &chandef);
7835                 if (err)
7836                         return err;
7837         }
7838
7839         if (!chandef.chan && params.offchan)
7840                 return -EINVAL;
7841
7842         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7843         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7844
7845         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
7846                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
7847                 int i;
7848
7849                 if (len % sizeof(u16))
7850                         return -EINVAL;
7851
7852                 params.n_csa_offsets = len / sizeof(u16);
7853                 params.csa_offsets =
7854                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
7855
7856                 /* check that all the offsets fit the frame */
7857                 for (i = 0; i < params.n_csa_offsets; i++) {
7858                         if (params.csa_offsets[i] >= params.len)
7859                                 return -EINVAL;
7860                 }
7861         }
7862
7863         if (!params.dont_wait_for_ack) {
7864                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7865                 if (!msg)
7866                         return -ENOMEM;
7867
7868                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7869                                      NL80211_CMD_FRAME);
7870                 if (!hdr) {
7871                         err = -ENOBUFS;
7872                         goto free_msg;
7873                 }
7874         }
7875
7876         params.chan = chandef.chan;
7877         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7878         if (err)
7879                 goto free_msg;
7880
7881         if (msg) {
7882                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7883                         goto nla_put_failure;
7884
7885                 genlmsg_end(msg, hdr);
7886                 return genlmsg_reply(msg, info);
7887         }
7888
7889         return 0;
7890
7891  nla_put_failure:
7892         err = -ENOBUFS;
7893  free_msg:
7894         nlmsg_free(msg);
7895         return err;
7896 }
7897
7898 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7899 {
7900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7901         struct wireless_dev *wdev = info->user_ptr[1];
7902         u64 cookie;
7903
7904         if (!info->attrs[NL80211_ATTR_COOKIE])
7905                 return -EINVAL;
7906
7907         if (!rdev->ops->mgmt_tx_cancel_wait)
7908                 return -EOPNOTSUPP;
7909
7910         switch (wdev->iftype) {
7911         case NL80211_IFTYPE_STATION:
7912         case NL80211_IFTYPE_ADHOC:
7913         case NL80211_IFTYPE_P2P_CLIENT:
7914         case NL80211_IFTYPE_AP:
7915         case NL80211_IFTYPE_AP_VLAN:
7916         case NL80211_IFTYPE_P2P_GO:
7917         case NL80211_IFTYPE_P2P_DEVICE:
7918                 break;
7919         default:
7920                 return -EOPNOTSUPP;
7921         }
7922
7923         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7924
7925         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7926 }
7927
7928 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7929 {
7930         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7931         struct wireless_dev *wdev;
7932         struct net_device *dev = info->user_ptr[1];
7933         u8 ps_state;
7934         bool state;
7935         int err;
7936
7937         if (!info->attrs[NL80211_ATTR_PS_STATE])
7938                 return -EINVAL;
7939
7940         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7941
7942         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7943                 return -EINVAL;
7944
7945         wdev = dev->ieee80211_ptr;
7946
7947         if (!rdev->ops->set_power_mgmt)
7948                 return -EOPNOTSUPP;
7949
7950         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7951
7952         if (state == wdev->ps)
7953                 return 0;
7954
7955         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7956         if (!err)
7957                 wdev->ps = state;
7958         return err;
7959 }
7960
7961 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7962 {
7963         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7964         enum nl80211_ps_state ps_state;
7965         struct wireless_dev *wdev;
7966         struct net_device *dev = info->user_ptr[1];
7967         struct sk_buff *msg;
7968         void *hdr;
7969         int err;
7970
7971         wdev = dev->ieee80211_ptr;
7972
7973         if (!rdev->ops->set_power_mgmt)
7974                 return -EOPNOTSUPP;
7975
7976         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7977         if (!msg)
7978                 return -ENOMEM;
7979
7980         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7981                              NL80211_CMD_GET_POWER_SAVE);
7982         if (!hdr) {
7983                 err = -ENOBUFS;
7984                 goto free_msg;
7985         }
7986
7987         if (wdev->ps)
7988                 ps_state = NL80211_PS_ENABLED;
7989         else
7990                 ps_state = NL80211_PS_DISABLED;
7991
7992         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7993                 goto nla_put_failure;
7994
7995         genlmsg_end(msg, hdr);
7996         return genlmsg_reply(msg, info);
7997
7998  nla_put_failure:
7999         err = -ENOBUFS;
8000  free_msg:
8001         nlmsg_free(msg);
8002         return err;
8003 }
8004
8005 static const struct nla_policy
8006 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8007         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8008         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8009         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8010         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8011         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8012         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8013 };
8014
8015 static int nl80211_set_cqm_txe(struct genl_info *info,
8016                                u32 rate, u32 pkts, u32 intvl)
8017 {
8018         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8019         struct net_device *dev = info->user_ptr[1];
8020         struct wireless_dev *wdev = dev->ieee80211_ptr;
8021
8022         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8023                 return -EINVAL;
8024
8025         if (!rdev->ops->set_cqm_txe_config)
8026                 return -EOPNOTSUPP;
8027
8028         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8029             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8030                 return -EOPNOTSUPP;
8031
8032         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8033 }
8034
8035 static int nl80211_set_cqm_rssi(struct genl_info *info,
8036                                 s32 threshold, u32 hysteresis)
8037 {
8038         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8039         struct net_device *dev = info->user_ptr[1];
8040         struct wireless_dev *wdev = dev->ieee80211_ptr;
8041
8042         if (threshold > 0)
8043                 return -EINVAL;
8044
8045         /* disabling - hysteresis should also be zero then */
8046         if (threshold == 0)
8047                 hysteresis = 0;
8048
8049         if (!rdev->ops->set_cqm_rssi_config)
8050                 return -EOPNOTSUPP;
8051
8052         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8053             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8054                 return -EOPNOTSUPP;
8055
8056         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8057 }
8058
8059 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8060 {
8061         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8062         struct nlattr *cqm;
8063         int err;
8064
8065         cqm = info->attrs[NL80211_ATTR_CQM];
8066         if (!cqm)
8067                 return -EINVAL;
8068
8069         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8070                                nl80211_attr_cqm_policy);
8071         if (err)
8072                 return err;
8073
8074         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8075             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8076                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8077                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8078
8079                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8080         }
8081
8082         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8083             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8084             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8085                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8086                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8087                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8088
8089                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8090         }
8091
8092         return -EINVAL;
8093 }
8094
8095 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8096 {
8097         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8098         struct net_device *dev = info->user_ptr[1];
8099         struct mesh_config cfg;
8100         struct mesh_setup setup;
8101         int err;
8102
8103         /* start with default */
8104         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8105         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8106
8107         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8108                 /* and parse parameters if given */
8109                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8110                 if (err)
8111                         return err;
8112         }
8113
8114         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8115             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8116                 return -EINVAL;
8117
8118         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8119         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8120
8121         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8122             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8123                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8124                         return -EINVAL;
8125
8126         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8127                 setup.beacon_interval =
8128                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8129                 if (setup.beacon_interval < 10 ||
8130                     setup.beacon_interval > 10000)
8131                         return -EINVAL;
8132         }
8133
8134         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8135                 setup.dtim_period =
8136                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8137                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8138                         return -EINVAL;
8139         }
8140
8141         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8142                 /* parse additional setup parameters if given */
8143                 err = nl80211_parse_mesh_setup(info, &setup);
8144                 if (err)
8145                         return err;
8146         }
8147
8148         if (setup.user_mpm)
8149                 cfg.auto_open_plinks = false;
8150
8151         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8152                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8153                 if (err)
8154                         return err;
8155         } else {
8156                 /* cfg80211_join_mesh() will sort it out */
8157                 setup.chandef.chan = NULL;
8158         }
8159
8160         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8161                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8162                 int n_rates =
8163                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8164                 struct ieee80211_supported_band *sband;
8165
8166                 if (!setup.chandef.chan)
8167                         return -EINVAL;
8168
8169                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8170
8171                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8172                                              &setup.basic_rates);
8173                 if (err)
8174                         return err;
8175         }
8176
8177         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8178 }
8179
8180 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8181 {
8182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8183         struct net_device *dev = info->user_ptr[1];
8184
8185         return cfg80211_leave_mesh(rdev, dev);
8186 }
8187
8188 #ifdef CONFIG_PM
8189 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8190                                         struct cfg80211_registered_device *rdev)
8191 {
8192         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8193         struct nlattr *nl_pats, *nl_pat;
8194         int i, pat_len;
8195
8196         if (!wowlan->n_patterns)
8197                 return 0;
8198
8199         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8200         if (!nl_pats)
8201                 return -ENOBUFS;
8202
8203         for (i = 0; i < wowlan->n_patterns; i++) {
8204                 nl_pat = nla_nest_start(msg, i + 1);
8205                 if (!nl_pat)
8206                         return -ENOBUFS;
8207                 pat_len = wowlan->patterns[i].pattern_len;
8208                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8209                             wowlan->patterns[i].mask) ||
8210                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8211                             wowlan->patterns[i].pattern) ||
8212                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8213                                 wowlan->patterns[i].pkt_offset))
8214                         return -ENOBUFS;
8215                 nla_nest_end(msg, nl_pat);
8216         }
8217         nla_nest_end(msg, nl_pats);
8218
8219         return 0;
8220 }
8221
8222 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8223                                    struct cfg80211_wowlan_tcp *tcp)
8224 {
8225         struct nlattr *nl_tcp;
8226
8227         if (!tcp)
8228                 return 0;
8229
8230         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8231         if (!nl_tcp)
8232                 return -ENOBUFS;
8233
8234         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8235             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8236             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8237             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8238             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8239             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8240                     tcp->payload_len, tcp->payload) ||
8241             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8242                         tcp->data_interval) ||
8243             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8244                     tcp->wake_len, tcp->wake_data) ||
8245             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8246                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8247                 return -ENOBUFS;
8248
8249         if (tcp->payload_seq.len &&
8250             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8251                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8252                 return -ENOBUFS;
8253
8254         if (tcp->payload_tok.len &&
8255             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8256                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8257                     &tcp->payload_tok))
8258                 return -ENOBUFS;
8259
8260         nla_nest_end(msg, nl_tcp);
8261
8262         return 0;
8263 }
8264
8265 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8266 {
8267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8268         struct sk_buff *msg;
8269         void *hdr;
8270         u32 size = NLMSG_DEFAULT_SIZE;
8271
8272         if (!rdev->wiphy.wowlan)
8273                 return -EOPNOTSUPP;
8274
8275         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8276                 /* adjust size to have room for all the data */
8277                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8278                         rdev->wiphy.wowlan_config->tcp->payload_len +
8279                         rdev->wiphy.wowlan_config->tcp->wake_len +
8280                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8281         }
8282
8283         msg = nlmsg_new(size, GFP_KERNEL);
8284         if (!msg)
8285                 return -ENOMEM;
8286
8287         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8288                              NL80211_CMD_GET_WOWLAN);
8289         if (!hdr)
8290                 goto nla_put_failure;
8291
8292         if (rdev->wiphy.wowlan_config) {
8293                 struct nlattr *nl_wowlan;
8294
8295                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8296                 if (!nl_wowlan)
8297                         goto nla_put_failure;
8298
8299                 if ((rdev->wiphy.wowlan_config->any &&
8300                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8301                     (rdev->wiphy.wowlan_config->disconnect &&
8302                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8303                     (rdev->wiphy.wowlan_config->magic_pkt &&
8304                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8305                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8306                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8307                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8308                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8309                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8310                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8311                     (rdev->wiphy.wowlan_config->rfkill_release &&
8312                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8313                         goto nla_put_failure;
8314
8315                 if (nl80211_send_wowlan_patterns(msg, rdev))
8316                         goto nla_put_failure;
8317
8318                 if (nl80211_send_wowlan_tcp(msg,
8319                                             rdev->wiphy.wowlan_config->tcp))
8320                         goto nla_put_failure;
8321
8322                 nla_nest_end(msg, nl_wowlan);
8323         }
8324
8325         genlmsg_end(msg, hdr);
8326         return genlmsg_reply(msg, info);
8327
8328 nla_put_failure:
8329         nlmsg_free(msg);
8330         return -ENOBUFS;
8331 }
8332
8333 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8334                                     struct nlattr *attr,
8335                                     struct cfg80211_wowlan *trig)
8336 {
8337         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8338         struct cfg80211_wowlan_tcp *cfg;
8339         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8340         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8341         u32 size;
8342         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8343         int err, port;
8344
8345         if (!rdev->wiphy.wowlan->tcp)
8346                 return -EINVAL;
8347
8348         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8349                         nla_data(attr), nla_len(attr),
8350                         nl80211_wowlan_tcp_policy);
8351         if (err)
8352                 return err;
8353
8354         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8355             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8356             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8357             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8358             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8359             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8360             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8361             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8362                 return -EINVAL;
8363
8364         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8365         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8366                 return -EINVAL;
8367
8368         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8369                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8370             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8371                 return -EINVAL;
8372
8373         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8374         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8375                 return -EINVAL;
8376
8377         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8378         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8379                 return -EINVAL;
8380
8381         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8382                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8383
8384                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8385                 tokens_size = tokln - sizeof(*tok);
8386
8387                 if (!tok->len || tokens_size % tok->len)
8388                         return -EINVAL;
8389                 if (!rdev->wiphy.wowlan->tcp->tok)
8390                         return -EINVAL;
8391                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8392                         return -EINVAL;
8393                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8394                         return -EINVAL;
8395                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8396                         return -EINVAL;
8397                 if (tok->offset + tok->len > data_size)
8398                         return -EINVAL;
8399         }
8400
8401         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8402                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8403                 if (!rdev->wiphy.wowlan->tcp->seq)
8404                         return -EINVAL;
8405                 if (seq->len == 0 || seq->len > 4)
8406                         return -EINVAL;
8407                 if (seq->len + seq->offset > data_size)
8408                         return -EINVAL;
8409         }
8410
8411         size = sizeof(*cfg);
8412         size += data_size;
8413         size += wake_size + wake_mask_size;
8414         size += tokens_size;
8415
8416         cfg = kzalloc(size, GFP_KERNEL);
8417         if (!cfg)
8418                 return -ENOMEM;
8419         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8420         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8421         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8422                ETH_ALEN);
8423         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8424                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8425         else
8426                 port = 0;
8427 #ifdef CONFIG_INET
8428         /* allocate a socket and port for it and use it */
8429         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8430                             IPPROTO_TCP, &cfg->sock, 1);
8431         if (err) {
8432                 kfree(cfg);
8433                 return err;
8434         }
8435         if (inet_csk_get_port(cfg->sock->sk, port)) {
8436                 sock_release(cfg->sock);
8437                 kfree(cfg);
8438                 return -EADDRINUSE;
8439         }
8440         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8441 #else
8442         if (!port) {
8443                 kfree(cfg);
8444                 return -EINVAL;
8445         }
8446         cfg->src_port = port;
8447 #endif
8448
8449         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8450         cfg->payload_len = data_size;
8451         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8452         memcpy((void *)cfg->payload,
8453                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8454                data_size);
8455         if (seq)
8456                 cfg->payload_seq = *seq;
8457         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8458         cfg->wake_len = wake_size;
8459         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8460         memcpy((void *)cfg->wake_data,
8461                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8462                wake_size);
8463         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8464                          data_size + wake_size;
8465         memcpy((void *)cfg->wake_mask,
8466                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8467                wake_mask_size);
8468         if (tok) {
8469                 cfg->tokens_size = tokens_size;
8470                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8471         }
8472
8473         trig->tcp = cfg;
8474
8475         return 0;
8476 }
8477
8478 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8479 {
8480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8481         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8482         struct cfg80211_wowlan new_triggers = {};
8483         struct cfg80211_wowlan *ntrig;
8484         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8485         int err, i;
8486         bool prev_enabled = rdev->wiphy.wowlan_config;
8487
8488         if (!wowlan)
8489                 return -EOPNOTSUPP;
8490
8491         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8492                 cfg80211_rdev_free_wowlan(rdev);
8493                 rdev->wiphy.wowlan_config = NULL;
8494                 goto set_wakeup;
8495         }
8496
8497         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8498                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8499                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8500                         nl80211_wowlan_policy);
8501         if (err)
8502                 return err;
8503
8504         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8505                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8506                         return -EINVAL;
8507                 new_triggers.any = true;
8508         }
8509
8510         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8511                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8512                         return -EINVAL;
8513                 new_triggers.disconnect = true;
8514         }
8515
8516         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8517                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8518                         return -EINVAL;
8519                 new_triggers.magic_pkt = true;
8520         }
8521
8522         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8523                 return -EINVAL;
8524
8525         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8526                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8527                         return -EINVAL;
8528                 new_triggers.gtk_rekey_failure = true;
8529         }
8530
8531         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8532                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8533                         return -EINVAL;
8534                 new_triggers.eap_identity_req = true;
8535         }
8536
8537         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8538                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8539                         return -EINVAL;
8540                 new_triggers.four_way_handshake = true;
8541         }
8542
8543         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8544                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8545                         return -EINVAL;
8546                 new_triggers.rfkill_release = true;
8547         }
8548
8549         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8550                 struct nlattr *pat;
8551                 int n_patterns = 0;
8552                 int rem, pat_len, mask_len, pkt_offset;
8553                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8554
8555                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8556                                     rem)
8557                         n_patterns++;
8558                 if (n_patterns > wowlan->n_patterns)
8559                         return -EINVAL;
8560
8561                 new_triggers.patterns = kcalloc(n_patterns,
8562                                                 sizeof(new_triggers.patterns[0]),
8563                                                 GFP_KERNEL);
8564                 if (!new_triggers.patterns)
8565                         return -ENOMEM;
8566
8567                 new_triggers.n_patterns = n_patterns;
8568                 i = 0;
8569
8570                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8571                                     rem) {
8572                         u8 *mask_pat;
8573
8574                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8575                                   nla_len(pat), NULL);
8576                         err = -EINVAL;
8577                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8578                             !pat_tb[NL80211_PKTPAT_PATTERN])
8579                                 goto error;
8580                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8581                         mask_len = DIV_ROUND_UP(pat_len, 8);
8582                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8583                                 goto error;
8584                         if (pat_len > wowlan->pattern_max_len ||
8585                             pat_len < wowlan->pattern_min_len)
8586                                 goto error;
8587
8588                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8589                                 pkt_offset = 0;
8590                         else
8591                                 pkt_offset = nla_get_u32(
8592                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8593                         if (pkt_offset > wowlan->max_pkt_offset)
8594                                 goto error;
8595                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8596
8597                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8598                         if (!mask_pat) {
8599                                 err = -ENOMEM;
8600                                 goto error;
8601                         }
8602                         new_triggers.patterns[i].mask = mask_pat;
8603                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8604                                mask_len);
8605                         mask_pat += mask_len;
8606                         new_triggers.patterns[i].pattern = mask_pat;
8607                         new_triggers.patterns[i].pattern_len = pat_len;
8608                         memcpy(mask_pat,
8609                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8610                                pat_len);
8611                         i++;
8612                 }
8613         }
8614
8615         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8616                 err = nl80211_parse_wowlan_tcp(
8617                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8618                         &new_triggers);
8619                 if (err)
8620                         goto error;
8621         }
8622
8623         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8624         if (!ntrig) {
8625                 err = -ENOMEM;
8626                 goto error;
8627         }
8628         cfg80211_rdev_free_wowlan(rdev);
8629         rdev->wiphy.wowlan_config = ntrig;
8630
8631  set_wakeup:
8632         if (rdev->ops->set_wakeup &&
8633             prev_enabled != !!rdev->wiphy.wowlan_config)
8634                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8635
8636         return 0;
8637  error:
8638         for (i = 0; i < new_triggers.n_patterns; i++)
8639                 kfree(new_triggers.patterns[i].mask);
8640         kfree(new_triggers.patterns);
8641         if (new_triggers.tcp && new_triggers.tcp->sock)
8642                 sock_release(new_triggers.tcp->sock);
8643         kfree(new_triggers.tcp);
8644         return err;
8645 }
8646 #endif
8647
8648 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8649                                        struct cfg80211_registered_device *rdev)
8650 {
8651         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8652         int i, j, pat_len;
8653         struct cfg80211_coalesce_rules *rule;
8654
8655         if (!rdev->coalesce->n_rules)
8656                 return 0;
8657
8658         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8659         if (!nl_rules)
8660                 return -ENOBUFS;
8661
8662         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8663                 nl_rule = nla_nest_start(msg, i + 1);
8664                 if (!nl_rule)
8665                         return -ENOBUFS;
8666
8667                 rule = &rdev->coalesce->rules[i];
8668                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8669                                 rule->delay))
8670                         return -ENOBUFS;
8671
8672                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8673                                 rule->condition))
8674                         return -ENOBUFS;
8675
8676                 nl_pats = nla_nest_start(msg,
8677                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8678                 if (!nl_pats)
8679                         return -ENOBUFS;
8680
8681                 for (j = 0; j < rule->n_patterns; j++) {
8682                         nl_pat = nla_nest_start(msg, j + 1);
8683                         if (!nl_pat)
8684                                 return -ENOBUFS;
8685                         pat_len = rule->patterns[j].pattern_len;
8686                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8687                                     DIV_ROUND_UP(pat_len, 8),
8688                                     rule->patterns[j].mask) ||
8689                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8690                                     rule->patterns[j].pattern) ||
8691                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8692                                         rule->patterns[j].pkt_offset))
8693                                 return -ENOBUFS;
8694                         nla_nest_end(msg, nl_pat);
8695                 }
8696                 nla_nest_end(msg, nl_pats);
8697                 nla_nest_end(msg, nl_rule);
8698         }
8699         nla_nest_end(msg, nl_rules);
8700
8701         return 0;
8702 }
8703
8704 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8705 {
8706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8707         struct sk_buff *msg;
8708         void *hdr;
8709
8710         if (!rdev->wiphy.coalesce)
8711                 return -EOPNOTSUPP;
8712
8713         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8714         if (!msg)
8715                 return -ENOMEM;
8716
8717         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8718                              NL80211_CMD_GET_COALESCE);
8719         if (!hdr)
8720                 goto nla_put_failure;
8721
8722         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8723                 goto nla_put_failure;
8724
8725         genlmsg_end(msg, hdr);
8726         return genlmsg_reply(msg, info);
8727
8728 nla_put_failure:
8729         nlmsg_free(msg);
8730         return -ENOBUFS;
8731 }
8732
8733 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8734 {
8735         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8736         int i, j;
8737         struct cfg80211_coalesce_rules *rule;
8738
8739         if (!coalesce)
8740                 return;
8741
8742         for (i = 0; i < coalesce->n_rules; i++) {
8743                 rule = &coalesce->rules[i];
8744                 for (j = 0; j < rule->n_patterns; j++)
8745                         kfree(rule->patterns[j].mask);
8746                 kfree(rule->patterns);
8747         }
8748         kfree(coalesce->rules);
8749         kfree(coalesce);
8750         rdev->coalesce = NULL;
8751 }
8752
8753 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8754                                        struct nlattr *rule,
8755                                        struct cfg80211_coalesce_rules *new_rule)
8756 {
8757         int err, i;
8758         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8759         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8760         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8761         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8762
8763         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8764                         nla_len(rule), nl80211_coalesce_policy);
8765         if (err)
8766                 return err;
8767
8768         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8769                 new_rule->delay =
8770                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8771         if (new_rule->delay > coalesce->max_delay)
8772                 return -EINVAL;
8773
8774         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8775                 new_rule->condition =
8776                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8777         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8778             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8779                 return -EINVAL;
8780
8781         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8782                 return -EINVAL;
8783
8784         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8785                             rem)
8786                 n_patterns++;
8787         if (n_patterns > coalesce->n_patterns)
8788                 return -EINVAL;
8789
8790         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8791                                      GFP_KERNEL);
8792         if (!new_rule->patterns)
8793                 return -ENOMEM;
8794
8795         new_rule->n_patterns = n_patterns;
8796         i = 0;
8797
8798         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8799                             rem) {
8800                 u8 *mask_pat;
8801
8802                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8803                           nla_len(pat), NULL);
8804                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8805                     !pat_tb[NL80211_PKTPAT_PATTERN])
8806                         return -EINVAL;
8807                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8808                 mask_len = DIV_ROUND_UP(pat_len, 8);
8809                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8810                         return -EINVAL;
8811                 if (pat_len > coalesce->pattern_max_len ||
8812                     pat_len < coalesce->pattern_min_len)
8813                         return -EINVAL;
8814
8815                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8816                         pkt_offset = 0;
8817                 else
8818                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8819                 if (pkt_offset > coalesce->max_pkt_offset)
8820                         return -EINVAL;
8821                 new_rule->patterns[i].pkt_offset = pkt_offset;
8822
8823                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8824                 if (!mask_pat)
8825                         return -ENOMEM;
8826
8827                 new_rule->patterns[i].mask = mask_pat;
8828                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8829                        mask_len);
8830
8831                 mask_pat += mask_len;
8832                 new_rule->patterns[i].pattern = mask_pat;
8833                 new_rule->patterns[i].pattern_len = pat_len;
8834                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8835                        pat_len);
8836                 i++;
8837         }
8838
8839         return 0;
8840 }
8841
8842 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8843 {
8844         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8845         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8846         struct cfg80211_coalesce new_coalesce = {};
8847         struct cfg80211_coalesce *n_coalesce;
8848         int err, rem_rule, n_rules = 0, i, j;
8849         struct nlattr *rule;
8850         struct cfg80211_coalesce_rules *tmp_rule;
8851
8852         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8853                 return -EOPNOTSUPP;
8854
8855         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8856                 cfg80211_rdev_free_coalesce(rdev);
8857                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8858                 return 0;
8859         }
8860
8861         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8862                             rem_rule)
8863                 n_rules++;
8864         if (n_rules > coalesce->n_rules)
8865                 return -EINVAL;
8866
8867         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8868                                      GFP_KERNEL);
8869         if (!new_coalesce.rules)
8870                 return -ENOMEM;
8871
8872         new_coalesce.n_rules = n_rules;
8873         i = 0;
8874
8875         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8876                             rem_rule) {
8877                 err = nl80211_parse_coalesce_rule(rdev, rule,
8878                                                   &new_coalesce.rules[i]);
8879                 if (err)
8880                         goto error;
8881
8882                 i++;
8883         }
8884
8885         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8886         if (err)
8887                 goto error;
8888
8889         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8890         if (!n_coalesce) {
8891                 err = -ENOMEM;
8892                 goto error;
8893         }
8894         cfg80211_rdev_free_coalesce(rdev);
8895         rdev->coalesce = n_coalesce;
8896
8897         return 0;
8898 error:
8899         for (i = 0; i < new_coalesce.n_rules; i++) {
8900                 tmp_rule = &new_coalesce.rules[i];
8901                 for (j = 0; j < tmp_rule->n_patterns; j++)
8902                         kfree(tmp_rule->patterns[j].mask);
8903                 kfree(tmp_rule->patterns);
8904         }
8905         kfree(new_coalesce.rules);
8906
8907         return err;
8908 }
8909
8910 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8911 {
8912         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8913         struct net_device *dev = info->user_ptr[1];
8914         struct wireless_dev *wdev = dev->ieee80211_ptr;
8915         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8916         struct cfg80211_gtk_rekey_data rekey_data;
8917         int err;
8918
8919         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8920                 return -EINVAL;
8921
8922         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8923                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8924                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8925                         nl80211_rekey_policy);
8926         if (err)
8927                 return err;
8928
8929         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8930                 return -ERANGE;
8931         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8932                 return -ERANGE;
8933         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8934                 return -ERANGE;
8935
8936         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8937                NL80211_KEK_LEN);
8938         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8939                NL80211_KCK_LEN);
8940         memcpy(rekey_data.replay_ctr,
8941                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8942                NL80211_REPLAY_CTR_LEN);
8943
8944         wdev_lock(wdev);
8945         if (!wdev->current_bss) {
8946                 err = -ENOTCONN;
8947                 goto out;
8948         }
8949
8950         if (!rdev->ops->set_rekey_data) {
8951                 err = -EOPNOTSUPP;
8952                 goto out;
8953         }
8954
8955         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8956  out:
8957         wdev_unlock(wdev);
8958         return err;
8959 }
8960
8961 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8962                                              struct genl_info *info)
8963 {
8964         struct net_device *dev = info->user_ptr[1];
8965         struct wireless_dev *wdev = dev->ieee80211_ptr;
8966
8967         if (wdev->iftype != NL80211_IFTYPE_AP &&
8968             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8969                 return -EINVAL;
8970
8971         if (wdev->ap_unexpected_nlportid)
8972                 return -EBUSY;
8973
8974         wdev->ap_unexpected_nlportid = info->snd_portid;
8975         return 0;
8976 }
8977
8978 static int nl80211_probe_client(struct sk_buff *skb,
8979                                 struct genl_info *info)
8980 {
8981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8982         struct net_device *dev = info->user_ptr[1];
8983         struct wireless_dev *wdev = dev->ieee80211_ptr;
8984         struct sk_buff *msg;
8985         void *hdr;
8986         const u8 *addr;
8987         u64 cookie;
8988         int err;
8989
8990         if (wdev->iftype != NL80211_IFTYPE_AP &&
8991             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8992                 return -EOPNOTSUPP;
8993
8994         if (!info->attrs[NL80211_ATTR_MAC])
8995                 return -EINVAL;
8996
8997         if (!rdev->ops->probe_client)
8998                 return -EOPNOTSUPP;
8999
9000         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9001         if (!msg)
9002                 return -ENOMEM;
9003
9004         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9005                              NL80211_CMD_PROBE_CLIENT);
9006         if (!hdr) {
9007                 err = -ENOBUFS;
9008                 goto free_msg;
9009         }
9010
9011         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9012
9013         err = rdev_probe_client(rdev, dev, addr, &cookie);
9014         if (err)
9015                 goto free_msg;
9016
9017         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9018                 goto nla_put_failure;
9019
9020         genlmsg_end(msg, hdr);
9021
9022         return genlmsg_reply(msg, info);
9023
9024  nla_put_failure:
9025         err = -ENOBUFS;
9026  free_msg:
9027         nlmsg_free(msg);
9028         return err;
9029 }
9030
9031 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9032 {
9033         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9034         struct cfg80211_beacon_registration *reg, *nreg;
9035         int rv;
9036
9037         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9038                 return -EOPNOTSUPP;
9039
9040         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9041         if (!nreg)
9042                 return -ENOMEM;
9043
9044         /* First, check if already registered. */
9045         spin_lock_bh(&rdev->beacon_registrations_lock);
9046         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9047                 if (reg->nlportid == info->snd_portid) {
9048                         rv = -EALREADY;
9049                         goto out_err;
9050                 }
9051         }
9052         /* Add it to the list */
9053         nreg->nlportid = info->snd_portid;
9054         list_add(&nreg->list, &rdev->beacon_registrations);
9055
9056         spin_unlock_bh(&rdev->beacon_registrations_lock);
9057
9058         return 0;
9059 out_err:
9060         spin_unlock_bh(&rdev->beacon_registrations_lock);
9061         kfree(nreg);
9062         return rv;
9063 }
9064
9065 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9066 {
9067         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9068         struct wireless_dev *wdev = info->user_ptr[1];
9069         int err;
9070
9071         if (!rdev->ops->start_p2p_device)
9072                 return -EOPNOTSUPP;
9073
9074         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9075                 return -EOPNOTSUPP;
9076
9077         if (wdev->p2p_started)
9078                 return 0;
9079
9080         if (rfkill_blocked(rdev->rfkill))
9081                 return -ERFKILL;
9082
9083         err = rdev_start_p2p_device(rdev, wdev);
9084         if (err)
9085                 return err;
9086
9087         wdev->p2p_started = true;
9088         rdev->opencount++;
9089
9090         return 0;
9091 }
9092
9093 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9094 {
9095         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9096         struct wireless_dev *wdev = info->user_ptr[1];
9097
9098         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9099                 return -EOPNOTSUPP;
9100
9101         if (!rdev->ops->stop_p2p_device)
9102                 return -EOPNOTSUPP;
9103
9104         cfg80211_stop_p2p_device(rdev, wdev);
9105
9106         return 0;
9107 }
9108
9109 static int nl80211_get_protocol_features(struct sk_buff *skb,
9110                                          struct genl_info *info)
9111 {
9112         void *hdr;
9113         struct sk_buff *msg;
9114
9115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9116         if (!msg)
9117                 return -ENOMEM;
9118
9119         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9120                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9121         if (!hdr)
9122                 goto nla_put_failure;
9123
9124         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9125                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9126                 goto nla_put_failure;
9127
9128         genlmsg_end(msg, hdr);
9129         return genlmsg_reply(msg, info);
9130
9131  nla_put_failure:
9132         kfree_skb(msg);
9133         return -ENOBUFS;
9134 }
9135
9136 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9137 {
9138         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9139         struct cfg80211_update_ft_ies_params ft_params;
9140         struct net_device *dev = info->user_ptr[1];
9141
9142         if (!rdev->ops->update_ft_ies)
9143                 return -EOPNOTSUPP;
9144
9145         if (!info->attrs[NL80211_ATTR_MDID] ||
9146             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9147                 return -EINVAL;
9148
9149         memset(&ft_params, 0, sizeof(ft_params));
9150         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9151         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9152         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9153
9154         return rdev_update_ft_ies(rdev, dev, &ft_params);
9155 }
9156
9157 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9158                                        struct genl_info *info)
9159 {
9160         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9161         struct wireless_dev *wdev = info->user_ptr[1];
9162         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9163         u16 duration;
9164         int ret;
9165
9166         if (!rdev->ops->crit_proto_start)
9167                 return -EOPNOTSUPP;
9168
9169         if (WARN_ON(!rdev->ops->crit_proto_stop))
9170                 return -EINVAL;
9171
9172         if (rdev->crit_proto_nlportid)
9173                 return -EBUSY;
9174
9175         /* determine protocol if provided */
9176         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9177                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9178
9179         if (proto >= NUM_NL80211_CRIT_PROTO)
9180                 return -EINVAL;
9181
9182         /* timeout must be provided */
9183         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9184                 return -EINVAL;
9185
9186         duration =
9187                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9188
9189         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9190                 return -ERANGE;
9191
9192         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9193         if (!ret)
9194                 rdev->crit_proto_nlportid = info->snd_portid;
9195
9196         return ret;
9197 }
9198
9199 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9200                                       struct genl_info *info)
9201 {
9202         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9203         struct wireless_dev *wdev = info->user_ptr[1];
9204
9205         if (!rdev->ops->crit_proto_stop)
9206                 return -EOPNOTSUPP;
9207
9208         if (rdev->crit_proto_nlportid) {
9209                 rdev->crit_proto_nlportid = 0;
9210                 rdev_crit_proto_stop(rdev, wdev);
9211         }
9212         return 0;
9213 }
9214
9215 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9216 {
9217         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9218         struct wireless_dev *wdev =
9219                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9220         int i, err;
9221         u32 vid, subcmd;
9222
9223         if (!rdev->wiphy.vendor_commands)
9224                 return -EOPNOTSUPP;
9225
9226         if (IS_ERR(wdev)) {
9227                 err = PTR_ERR(wdev);
9228                 if (err != -EINVAL)
9229                         return err;
9230                 wdev = NULL;
9231         } else if (wdev->wiphy != &rdev->wiphy) {
9232                 return -EINVAL;
9233         }
9234
9235         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9236             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9237                 return -EINVAL;
9238
9239         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9240         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9241         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9242                 const struct wiphy_vendor_command *vcmd;
9243                 void *data = NULL;
9244                 int len = 0;
9245
9246                 vcmd = &rdev->wiphy.vendor_commands[i];
9247
9248                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9249                         continue;
9250
9251                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9252                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9253                         if (!wdev)
9254                                 return -EINVAL;
9255                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9256                             !wdev->netdev)
9257                                 return -EINVAL;
9258
9259                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9260                                 if (wdev->netdev &&
9261                                     !netif_running(wdev->netdev))
9262                                         return -ENETDOWN;
9263                                 if (!wdev->netdev && !wdev->p2p_started)
9264                                         return -ENETDOWN;
9265                         }
9266                 } else {
9267                         wdev = NULL;
9268                 }
9269
9270                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9271                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9272                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9273                 }
9274
9275                 rdev->cur_cmd_info = info;
9276                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9277                                                           data, len);
9278                 rdev->cur_cmd_info = NULL;
9279                 return err;
9280         }
9281
9282         return -EOPNOTSUPP;
9283 }
9284
9285 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
9286                                            enum nl80211_commands cmd,
9287                                            enum nl80211_attrs attr,
9288                                            int approxlen)
9289 {
9290         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
9291
9292         if (WARN_ON(!rdev->cur_cmd_info))
9293                 return NULL;
9294
9295         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
9296                                            rdev->cur_cmd_info->snd_portid,
9297                                            rdev->cur_cmd_info->snd_seq,
9298                                            cmd, attr, NULL, GFP_KERNEL);
9299 }
9300 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
9301
9302 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
9303 {
9304         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
9305         void *hdr = ((void **)skb->cb)[1];
9306         struct nlattr *data = ((void **)skb->cb)[2];
9307
9308         /* clear CB data for netlink core to own from now on */
9309         memset(skb->cb, 0, sizeof(skb->cb));
9310
9311         if (WARN_ON(!rdev->cur_cmd_info)) {
9312                 kfree_skb(skb);
9313                 return -EINVAL;
9314         }
9315
9316         nla_nest_end(skb, data);
9317         genlmsg_end(skb, hdr);
9318         return genlmsg_reply(skb, rdev->cur_cmd_info);
9319 }
9320 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
9321
9322
9323 static int nl80211_set_qos_map(struct sk_buff *skb,
9324                                struct genl_info *info)
9325 {
9326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9327         struct cfg80211_qos_map *qos_map = NULL;
9328         struct net_device *dev = info->user_ptr[1];
9329         u8 *pos, len, num_des, des_len, des;
9330         int ret;
9331
9332         if (!rdev->ops->set_qos_map)
9333                 return -EOPNOTSUPP;
9334
9335         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
9336                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
9337                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
9338
9339                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
9340                     len > IEEE80211_QOS_MAP_LEN_MAX)
9341                         return -EINVAL;
9342
9343                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
9344                 if (!qos_map)
9345                         return -ENOMEM;
9346
9347                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
9348                 if (num_des) {
9349                         des_len = num_des *
9350                                 sizeof(struct cfg80211_dscp_exception);
9351                         memcpy(qos_map->dscp_exception, pos, des_len);
9352                         qos_map->num_des = num_des;
9353                         for (des = 0; des < num_des; des++) {
9354                                 if (qos_map->dscp_exception[des].up > 7) {
9355                                         kfree(qos_map);
9356                                         return -EINVAL;
9357                                 }
9358                         }
9359                         pos += des_len;
9360                 }
9361                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
9362         }
9363
9364         wdev_lock(dev->ieee80211_ptr);
9365         ret = nl80211_key_allowed(dev->ieee80211_ptr);
9366         if (!ret)
9367                 ret = rdev_set_qos_map(rdev, dev, qos_map);
9368         wdev_unlock(dev->ieee80211_ptr);
9369
9370         kfree(qos_map);
9371         return ret;
9372 }
9373
9374 #define NL80211_FLAG_NEED_WIPHY         0x01
9375 #define NL80211_FLAG_NEED_NETDEV        0x02
9376 #define NL80211_FLAG_NEED_RTNL          0x04
9377 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
9378 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
9379                                          NL80211_FLAG_CHECK_NETDEV_UP)
9380 #define NL80211_FLAG_NEED_WDEV          0x10
9381 /* If a netdev is associated, it must be UP, P2P must be started */
9382 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
9383                                          NL80211_FLAG_CHECK_NETDEV_UP)
9384
9385 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
9386                             struct genl_info *info)
9387 {
9388         struct cfg80211_registered_device *rdev;
9389         struct wireless_dev *wdev;
9390         struct net_device *dev;
9391         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
9392
9393         if (rtnl)
9394                 rtnl_lock();
9395
9396         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
9397                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
9398                 if (IS_ERR(rdev)) {
9399                         if (rtnl)
9400                                 rtnl_unlock();
9401                         return PTR_ERR(rdev);
9402                 }
9403                 info->user_ptr[0] = rdev;
9404         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
9405                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9406                 ASSERT_RTNL();
9407
9408                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9409                                                   info->attrs);
9410                 if (IS_ERR(wdev)) {
9411                         if (rtnl)
9412                                 rtnl_unlock();
9413                         return PTR_ERR(wdev);
9414                 }
9415
9416                 dev = wdev->netdev;
9417                 rdev = wiphy_to_rdev(wdev->wiphy);
9418
9419                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9420                         if (!dev) {
9421                                 if (rtnl)
9422                                         rtnl_unlock();
9423                                 return -EINVAL;
9424                         }
9425
9426                         info->user_ptr[1] = dev;
9427                 } else {
9428                         info->user_ptr[1] = wdev;
9429                 }
9430
9431                 if (dev) {
9432                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9433                             !netif_running(dev)) {
9434                                 if (rtnl)
9435                                         rtnl_unlock();
9436                                 return -ENETDOWN;
9437                         }
9438
9439                         dev_hold(dev);
9440                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9441                         if (!wdev->p2p_started) {
9442                                 if (rtnl)
9443                                         rtnl_unlock();
9444                                 return -ENETDOWN;
9445                         }
9446                 }
9447
9448                 info->user_ptr[0] = rdev;
9449         }
9450
9451         return 0;
9452 }
9453
9454 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
9455                               struct genl_info *info)
9456 {
9457         if (info->user_ptr[1]) {
9458                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9459                         struct wireless_dev *wdev = info->user_ptr[1];
9460
9461                         if (wdev->netdev)
9462                                 dev_put(wdev->netdev);
9463                 } else {
9464                         dev_put(info->user_ptr[1]);
9465                 }
9466         }
9467         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
9468                 rtnl_unlock();
9469 }
9470
9471 static const struct genl_ops nl80211_ops[] = {
9472         {
9473                 .cmd = NL80211_CMD_GET_WIPHY,
9474                 .doit = nl80211_get_wiphy,
9475                 .dumpit = nl80211_dump_wiphy,
9476                 .done = nl80211_dump_wiphy_done,
9477                 .policy = nl80211_policy,
9478                 /* can be retrieved by unprivileged users */
9479                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9480                                   NL80211_FLAG_NEED_RTNL,
9481         },
9482         {
9483                 .cmd = NL80211_CMD_SET_WIPHY,
9484                 .doit = nl80211_set_wiphy,
9485                 .policy = nl80211_policy,
9486                 .flags = GENL_ADMIN_PERM,
9487                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9488         },
9489         {
9490                 .cmd = NL80211_CMD_GET_INTERFACE,
9491                 .doit = nl80211_get_interface,
9492                 .dumpit = nl80211_dump_interface,
9493                 .policy = nl80211_policy,
9494                 /* can be retrieved by unprivileged users */
9495                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9496                                   NL80211_FLAG_NEED_RTNL,
9497         },
9498         {
9499                 .cmd = NL80211_CMD_SET_INTERFACE,
9500                 .doit = nl80211_set_interface,
9501                 .policy = nl80211_policy,
9502                 .flags = GENL_ADMIN_PERM,
9503                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9504                                   NL80211_FLAG_NEED_RTNL,
9505         },
9506         {
9507                 .cmd = NL80211_CMD_NEW_INTERFACE,
9508                 .doit = nl80211_new_interface,
9509                 .policy = nl80211_policy,
9510                 .flags = GENL_ADMIN_PERM,
9511                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9512                                   NL80211_FLAG_NEED_RTNL,
9513         },
9514         {
9515                 .cmd = NL80211_CMD_DEL_INTERFACE,
9516                 .doit = nl80211_del_interface,
9517                 .policy = nl80211_policy,
9518                 .flags = GENL_ADMIN_PERM,
9519                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9520                                   NL80211_FLAG_NEED_RTNL,
9521         },
9522         {
9523                 .cmd = NL80211_CMD_GET_KEY,
9524                 .doit = nl80211_get_key,
9525                 .policy = nl80211_policy,
9526                 .flags = GENL_ADMIN_PERM,
9527                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9528                                   NL80211_FLAG_NEED_RTNL,
9529         },
9530         {
9531                 .cmd = NL80211_CMD_SET_KEY,
9532                 .doit = nl80211_set_key,
9533                 .policy = nl80211_policy,
9534                 .flags = GENL_ADMIN_PERM,
9535                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9536                                   NL80211_FLAG_NEED_RTNL,
9537         },
9538         {
9539                 .cmd = NL80211_CMD_NEW_KEY,
9540                 .doit = nl80211_new_key,
9541                 .policy = nl80211_policy,
9542                 .flags = GENL_ADMIN_PERM,
9543                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9544                                   NL80211_FLAG_NEED_RTNL,
9545         },
9546         {
9547                 .cmd = NL80211_CMD_DEL_KEY,
9548                 .doit = nl80211_del_key,
9549                 .policy = nl80211_policy,
9550                 .flags = GENL_ADMIN_PERM,
9551                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9552                                   NL80211_FLAG_NEED_RTNL,
9553         },
9554         {
9555                 .cmd = NL80211_CMD_SET_BEACON,
9556                 .policy = nl80211_policy,
9557                 .flags = GENL_ADMIN_PERM,
9558                 .doit = nl80211_set_beacon,
9559                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9560                                   NL80211_FLAG_NEED_RTNL,
9561         },
9562         {
9563                 .cmd = NL80211_CMD_START_AP,
9564                 .policy = nl80211_policy,
9565                 .flags = GENL_ADMIN_PERM,
9566                 .doit = nl80211_start_ap,
9567                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9568                                   NL80211_FLAG_NEED_RTNL,
9569         },
9570         {
9571                 .cmd = NL80211_CMD_STOP_AP,
9572                 .policy = nl80211_policy,
9573                 .flags = GENL_ADMIN_PERM,
9574                 .doit = nl80211_stop_ap,
9575                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9576                                   NL80211_FLAG_NEED_RTNL,
9577         },
9578         {
9579                 .cmd = NL80211_CMD_GET_STATION,
9580                 .doit = nl80211_get_station,
9581                 .dumpit = nl80211_dump_station,
9582                 .policy = nl80211_policy,
9583                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9584                                   NL80211_FLAG_NEED_RTNL,
9585         },
9586         {
9587                 .cmd = NL80211_CMD_SET_STATION,
9588                 .doit = nl80211_set_station,
9589                 .policy = nl80211_policy,
9590                 .flags = GENL_ADMIN_PERM,
9591                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9592                                   NL80211_FLAG_NEED_RTNL,
9593         },
9594         {
9595                 .cmd = NL80211_CMD_NEW_STATION,
9596                 .doit = nl80211_new_station,
9597                 .policy = nl80211_policy,
9598                 .flags = GENL_ADMIN_PERM,
9599                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9600                                   NL80211_FLAG_NEED_RTNL,
9601         },
9602         {
9603                 .cmd = NL80211_CMD_DEL_STATION,
9604                 .doit = nl80211_del_station,
9605                 .policy = nl80211_policy,
9606                 .flags = GENL_ADMIN_PERM,
9607                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9608                                   NL80211_FLAG_NEED_RTNL,
9609         },
9610         {
9611                 .cmd = NL80211_CMD_GET_MPATH,
9612                 .doit = nl80211_get_mpath,
9613                 .dumpit = nl80211_dump_mpath,
9614                 .policy = nl80211_policy,
9615                 .flags = GENL_ADMIN_PERM,
9616                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9617                                   NL80211_FLAG_NEED_RTNL,
9618         },
9619         {
9620                 .cmd = NL80211_CMD_SET_MPATH,
9621                 .doit = nl80211_set_mpath,
9622                 .policy = nl80211_policy,
9623                 .flags = GENL_ADMIN_PERM,
9624                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9625                                   NL80211_FLAG_NEED_RTNL,
9626         },
9627         {
9628                 .cmd = NL80211_CMD_NEW_MPATH,
9629                 .doit = nl80211_new_mpath,
9630                 .policy = nl80211_policy,
9631                 .flags = GENL_ADMIN_PERM,
9632                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9633                                   NL80211_FLAG_NEED_RTNL,
9634         },
9635         {
9636                 .cmd = NL80211_CMD_DEL_MPATH,
9637                 .doit = nl80211_del_mpath,
9638                 .policy = nl80211_policy,
9639                 .flags = GENL_ADMIN_PERM,
9640                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9641                                   NL80211_FLAG_NEED_RTNL,
9642         },
9643         {
9644                 .cmd = NL80211_CMD_SET_BSS,
9645                 .doit = nl80211_set_bss,
9646                 .policy = nl80211_policy,
9647                 .flags = GENL_ADMIN_PERM,
9648                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9649                                   NL80211_FLAG_NEED_RTNL,
9650         },
9651         {
9652                 .cmd = NL80211_CMD_GET_REG,
9653                 .doit = nl80211_get_reg,
9654                 .policy = nl80211_policy,
9655                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9656                 /* can be retrieved by unprivileged users */
9657         },
9658         {
9659                 .cmd = NL80211_CMD_SET_REG,
9660                 .doit = nl80211_set_reg,
9661                 .policy = nl80211_policy,
9662                 .flags = GENL_ADMIN_PERM,
9663                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9664         },
9665         {
9666                 .cmd = NL80211_CMD_REQ_SET_REG,
9667                 .doit = nl80211_req_set_reg,
9668                 .policy = nl80211_policy,
9669                 .flags = GENL_ADMIN_PERM,
9670         },
9671         {
9672                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9673                 .doit = nl80211_get_mesh_config,
9674                 .policy = nl80211_policy,
9675                 /* can be retrieved by unprivileged users */
9676                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9677                                   NL80211_FLAG_NEED_RTNL,
9678         },
9679         {
9680                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9681                 .doit = nl80211_update_mesh_config,
9682                 .policy = nl80211_policy,
9683                 .flags = GENL_ADMIN_PERM,
9684                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9685                                   NL80211_FLAG_NEED_RTNL,
9686         },
9687         {
9688                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9689                 .doit = nl80211_trigger_scan,
9690                 .policy = nl80211_policy,
9691                 .flags = GENL_ADMIN_PERM,
9692                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9693                                   NL80211_FLAG_NEED_RTNL,
9694         },
9695         {
9696                 .cmd = NL80211_CMD_GET_SCAN,
9697                 .policy = nl80211_policy,
9698                 .dumpit = nl80211_dump_scan,
9699         },
9700         {
9701                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9702                 .doit = nl80211_start_sched_scan,
9703                 .policy = nl80211_policy,
9704                 .flags = GENL_ADMIN_PERM,
9705                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9706                                   NL80211_FLAG_NEED_RTNL,
9707         },
9708         {
9709                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9710                 .doit = nl80211_stop_sched_scan,
9711                 .policy = nl80211_policy,
9712                 .flags = GENL_ADMIN_PERM,
9713                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9714                                   NL80211_FLAG_NEED_RTNL,
9715         },
9716         {
9717                 .cmd = NL80211_CMD_AUTHENTICATE,
9718                 .doit = nl80211_authenticate,
9719                 .policy = nl80211_policy,
9720                 .flags = GENL_ADMIN_PERM,
9721                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9722                                   NL80211_FLAG_NEED_RTNL,
9723         },
9724         {
9725                 .cmd = NL80211_CMD_ASSOCIATE,
9726                 .doit = nl80211_associate,
9727                 .policy = nl80211_policy,
9728                 .flags = GENL_ADMIN_PERM,
9729                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9730                                   NL80211_FLAG_NEED_RTNL,
9731         },
9732         {
9733                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9734                 .doit = nl80211_deauthenticate,
9735                 .policy = nl80211_policy,
9736                 .flags = GENL_ADMIN_PERM,
9737                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9738                                   NL80211_FLAG_NEED_RTNL,
9739         },
9740         {
9741                 .cmd = NL80211_CMD_DISASSOCIATE,
9742                 .doit = nl80211_disassociate,
9743                 .policy = nl80211_policy,
9744                 .flags = GENL_ADMIN_PERM,
9745                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9746                                   NL80211_FLAG_NEED_RTNL,
9747         },
9748         {
9749                 .cmd = NL80211_CMD_JOIN_IBSS,
9750                 .doit = nl80211_join_ibss,
9751                 .policy = nl80211_policy,
9752                 .flags = GENL_ADMIN_PERM,
9753                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9754                                   NL80211_FLAG_NEED_RTNL,
9755         },
9756         {
9757                 .cmd = NL80211_CMD_LEAVE_IBSS,
9758                 .doit = nl80211_leave_ibss,
9759                 .policy = nl80211_policy,
9760                 .flags = GENL_ADMIN_PERM,
9761                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9762                                   NL80211_FLAG_NEED_RTNL,
9763         },
9764 #ifdef CONFIG_NL80211_TESTMODE
9765         {
9766                 .cmd = NL80211_CMD_TESTMODE,
9767                 .doit = nl80211_testmode_do,
9768                 .dumpit = nl80211_testmode_dump,
9769                 .policy = nl80211_policy,
9770                 .flags = GENL_ADMIN_PERM,
9771                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9772                                   NL80211_FLAG_NEED_RTNL,
9773         },
9774 #endif
9775         {
9776                 .cmd = NL80211_CMD_CONNECT,
9777                 .doit = nl80211_connect,
9778                 .policy = nl80211_policy,
9779                 .flags = GENL_ADMIN_PERM,
9780                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9781                                   NL80211_FLAG_NEED_RTNL,
9782         },
9783         {
9784                 .cmd = NL80211_CMD_DISCONNECT,
9785                 .doit = nl80211_disconnect,
9786                 .policy = nl80211_policy,
9787                 .flags = GENL_ADMIN_PERM,
9788                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9789                                   NL80211_FLAG_NEED_RTNL,
9790         },
9791         {
9792                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9793                 .doit = nl80211_wiphy_netns,
9794                 .policy = nl80211_policy,
9795                 .flags = GENL_ADMIN_PERM,
9796                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9797                                   NL80211_FLAG_NEED_RTNL,
9798         },
9799         {
9800                 .cmd = NL80211_CMD_GET_SURVEY,
9801                 .policy = nl80211_policy,
9802                 .dumpit = nl80211_dump_survey,
9803         },
9804         {
9805                 .cmd = NL80211_CMD_SET_PMKSA,
9806                 .doit = nl80211_setdel_pmksa,
9807                 .policy = nl80211_policy,
9808                 .flags = GENL_ADMIN_PERM,
9809                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9810                                   NL80211_FLAG_NEED_RTNL,
9811         },
9812         {
9813                 .cmd = NL80211_CMD_DEL_PMKSA,
9814                 .doit = nl80211_setdel_pmksa,
9815                 .policy = nl80211_policy,
9816                 .flags = GENL_ADMIN_PERM,
9817                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9818                                   NL80211_FLAG_NEED_RTNL,
9819         },
9820         {
9821                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9822                 .doit = nl80211_flush_pmksa,
9823                 .policy = nl80211_policy,
9824                 .flags = GENL_ADMIN_PERM,
9825                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9826                                   NL80211_FLAG_NEED_RTNL,
9827         },
9828         {
9829                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9830                 .doit = nl80211_remain_on_channel,
9831                 .policy = nl80211_policy,
9832                 .flags = GENL_ADMIN_PERM,
9833                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9834                                   NL80211_FLAG_NEED_RTNL,
9835         },
9836         {
9837                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9838                 .doit = nl80211_cancel_remain_on_channel,
9839                 .policy = nl80211_policy,
9840                 .flags = GENL_ADMIN_PERM,
9841                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9842                                   NL80211_FLAG_NEED_RTNL,
9843         },
9844         {
9845                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9846                 .doit = nl80211_set_tx_bitrate_mask,
9847                 .policy = nl80211_policy,
9848                 .flags = GENL_ADMIN_PERM,
9849                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9850                                   NL80211_FLAG_NEED_RTNL,
9851         },
9852         {
9853                 .cmd = NL80211_CMD_REGISTER_FRAME,
9854                 .doit = nl80211_register_mgmt,
9855                 .policy = nl80211_policy,
9856                 .flags = GENL_ADMIN_PERM,
9857                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9858                                   NL80211_FLAG_NEED_RTNL,
9859         },
9860         {
9861                 .cmd = NL80211_CMD_FRAME,
9862                 .doit = nl80211_tx_mgmt,
9863                 .policy = nl80211_policy,
9864                 .flags = GENL_ADMIN_PERM,
9865                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9866                                   NL80211_FLAG_NEED_RTNL,
9867         },
9868         {
9869                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9870                 .doit = nl80211_tx_mgmt_cancel_wait,
9871                 .policy = nl80211_policy,
9872                 .flags = GENL_ADMIN_PERM,
9873                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9874                                   NL80211_FLAG_NEED_RTNL,
9875         },
9876         {
9877                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9878                 .doit = nl80211_set_power_save,
9879                 .policy = nl80211_policy,
9880                 .flags = GENL_ADMIN_PERM,
9881                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9882                                   NL80211_FLAG_NEED_RTNL,
9883         },
9884         {
9885                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9886                 .doit = nl80211_get_power_save,
9887                 .policy = nl80211_policy,
9888                 /* can be retrieved by unprivileged users */
9889                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9890                                   NL80211_FLAG_NEED_RTNL,
9891         },
9892         {
9893                 .cmd = NL80211_CMD_SET_CQM,
9894                 .doit = nl80211_set_cqm,
9895                 .policy = nl80211_policy,
9896                 .flags = GENL_ADMIN_PERM,
9897                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9898                                   NL80211_FLAG_NEED_RTNL,
9899         },
9900         {
9901                 .cmd = NL80211_CMD_SET_CHANNEL,
9902                 .doit = nl80211_set_channel,
9903                 .policy = nl80211_policy,
9904                 .flags = GENL_ADMIN_PERM,
9905                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9906                                   NL80211_FLAG_NEED_RTNL,
9907         },
9908         {
9909                 .cmd = NL80211_CMD_SET_WDS_PEER,
9910                 .doit = nl80211_set_wds_peer,
9911                 .policy = nl80211_policy,
9912                 .flags = GENL_ADMIN_PERM,
9913                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9914                                   NL80211_FLAG_NEED_RTNL,
9915         },
9916         {
9917                 .cmd = NL80211_CMD_JOIN_MESH,
9918                 .doit = nl80211_join_mesh,
9919                 .policy = nl80211_policy,
9920                 .flags = GENL_ADMIN_PERM,
9921                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9922                                   NL80211_FLAG_NEED_RTNL,
9923         },
9924         {
9925                 .cmd = NL80211_CMD_LEAVE_MESH,
9926                 .doit = nl80211_leave_mesh,
9927                 .policy = nl80211_policy,
9928                 .flags = GENL_ADMIN_PERM,
9929                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9930                                   NL80211_FLAG_NEED_RTNL,
9931         },
9932 #ifdef CONFIG_PM
9933         {
9934                 .cmd = NL80211_CMD_GET_WOWLAN,
9935                 .doit = nl80211_get_wowlan,
9936                 .policy = nl80211_policy,
9937                 /* can be retrieved by unprivileged users */
9938                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9939                                   NL80211_FLAG_NEED_RTNL,
9940         },
9941         {
9942                 .cmd = NL80211_CMD_SET_WOWLAN,
9943                 .doit = nl80211_set_wowlan,
9944                 .policy = nl80211_policy,
9945                 .flags = GENL_ADMIN_PERM,
9946                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9947                                   NL80211_FLAG_NEED_RTNL,
9948         },
9949 #endif
9950         {
9951                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9952                 .doit = nl80211_set_rekey_data,
9953                 .policy = nl80211_policy,
9954                 .flags = GENL_ADMIN_PERM,
9955                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9956                                   NL80211_FLAG_NEED_RTNL,
9957         },
9958         {
9959                 .cmd = NL80211_CMD_TDLS_MGMT,
9960                 .doit = nl80211_tdls_mgmt,
9961                 .policy = nl80211_policy,
9962                 .flags = GENL_ADMIN_PERM,
9963                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9964                                   NL80211_FLAG_NEED_RTNL,
9965         },
9966         {
9967                 .cmd = NL80211_CMD_TDLS_OPER,
9968                 .doit = nl80211_tdls_oper,
9969                 .policy = nl80211_policy,
9970                 .flags = GENL_ADMIN_PERM,
9971                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9972                                   NL80211_FLAG_NEED_RTNL,
9973         },
9974         {
9975                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9976                 .doit = nl80211_register_unexpected_frame,
9977                 .policy = nl80211_policy,
9978                 .flags = GENL_ADMIN_PERM,
9979                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9980                                   NL80211_FLAG_NEED_RTNL,
9981         },
9982         {
9983                 .cmd = NL80211_CMD_PROBE_CLIENT,
9984                 .doit = nl80211_probe_client,
9985                 .policy = nl80211_policy,
9986                 .flags = GENL_ADMIN_PERM,
9987                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9988                                   NL80211_FLAG_NEED_RTNL,
9989         },
9990         {
9991                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9992                 .doit = nl80211_register_beacons,
9993                 .policy = nl80211_policy,
9994                 .flags = GENL_ADMIN_PERM,
9995                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9996                                   NL80211_FLAG_NEED_RTNL,
9997         },
9998         {
9999                 .cmd = NL80211_CMD_SET_NOACK_MAP,
10000                 .doit = nl80211_set_noack_map,
10001                 .policy = nl80211_policy,
10002                 .flags = GENL_ADMIN_PERM,
10003                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10004                                   NL80211_FLAG_NEED_RTNL,
10005         },
10006         {
10007                 .cmd = NL80211_CMD_START_P2P_DEVICE,
10008                 .doit = nl80211_start_p2p_device,
10009                 .policy = nl80211_policy,
10010                 .flags = GENL_ADMIN_PERM,
10011                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10012                                   NL80211_FLAG_NEED_RTNL,
10013         },
10014         {
10015                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
10016                 .doit = nl80211_stop_p2p_device,
10017                 .policy = nl80211_policy,
10018                 .flags = GENL_ADMIN_PERM,
10019                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10020                                   NL80211_FLAG_NEED_RTNL,
10021         },
10022         {
10023                 .cmd = NL80211_CMD_SET_MCAST_RATE,
10024                 .doit = nl80211_set_mcast_rate,
10025                 .policy = nl80211_policy,
10026                 .flags = GENL_ADMIN_PERM,
10027                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10028                                   NL80211_FLAG_NEED_RTNL,
10029         },
10030         {
10031                 .cmd = NL80211_CMD_SET_MAC_ACL,
10032                 .doit = nl80211_set_mac_acl,
10033                 .policy = nl80211_policy,
10034                 .flags = GENL_ADMIN_PERM,
10035                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10036                                   NL80211_FLAG_NEED_RTNL,
10037         },
10038         {
10039                 .cmd = NL80211_CMD_RADAR_DETECT,
10040                 .doit = nl80211_start_radar_detection,
10041                 .policy = nl80211_policy,
10042                 .flags = GENL_ADMIN_PERM,
10043                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10044                                   NL80211_FLAG_NEED_RTNL,
10045         },
10046         {
10047                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
10048                 .doit = nl80211_get_protocol_features,
10049                 .policy = nl80211_policy,
10050         },
10051         {
10052                 .cmd = NL80211_CMD_UPDATE_FT_IES,
10053                 .doit = nl80211_update_ft_ies,
10054                 .policy = nl80211_policy,
10055                 .flags = GENL_ADMIN_PERM,
10056                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10057                                   NL80211_FLAG_NEED_RTNL,
10058         },
10059         {
10060                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
10061                 .doit = nl80211_crit_protocol_start,
10062                 .policy = nl80211_policy,
10063                 .flags = GENL_ADMIN_PERM,
10064                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10065                                   NL80211_FLAG_NEED_RTNL,
10066         },
10067         {
10068                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
10069                 .doit = nl80211_crit_protocol_stop,
10070                 .policy = nl80211_policy,
10071                 .flags = GENL_ADMIN_PERM,
10072                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10073                                   NL80211_FLAG_NEED_RTNL,
10074         },
10075         {
10076                 .cmd = NL80211_CMD_GET_COALESCE,
10077                 .doit = nl80211_get_coalesce,
10078                 .policy = nl80211_policy,
10079                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10080                                   NL80211_FLAG_NEED_RTNL,
10081         },
10082         {
10083                 .cmd = NL80211_CMD_SET_COALESCE,
10084                 .doit = nl80211_set_coalesce,
10085                 .policy = nl80211_policy,
10086                 .flags = GENL_ADMIN_PERM,
10087                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10088                                   NL80211_FLAG_NEED_RTNL,
10089         },
10090         {
10091                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
10092                 .doit = nl80211_channel_switch,
10093                 .policy = nl80211_policy,
10094                 .flags = GENL_ADMIN_PERM,
10095                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10096                                   NL80211_FLAG_NEED_RTNL,
10097         },
10098         {
10099                 .cmd = NL80211_CMD_VENDOR,
10100                 .doit = nl80211_vendor_cmd,
10101                 .policy = nl80211_policy,
10102                 .flags = GENL_ADMIN_PERM,
10103                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10104                                   NL80211_FLAG_NEED_RTNL,
10105         },
10106         {
10107                 .cmd = NL80211_CMD_SET_QOS_MAP,
10108                 .doit = nl80211_set_qos_map,
10109                 .policy = nl80211_policy,
10110                 .flags = GENL_ADMIN_PERM,
10111                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10112                                   NL80211_FLAG_NEED_RTNL,
10113         },
10114 };
10115
10116 /* notification functions */
10117
10118 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
10119                           enum nl80211_commands cmd)
10120 {
10121         struct sk_buff *msg;
10122         struct nl80211_dump_wiphy_state state = {};
10123
10124         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
10125                 cmd != NL80211_CMD_DEL_WIPHY);
10126
10127         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10128         if (!msg)
10129                 return;
10130
10131         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
10132                 nlmsg_free(msg);
10133                 return;
10134         }
10135
10136         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10137                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
10138 }
10139
10140 static int nl80211_add_scan_req(struct sk_buff *msg,
10141                                 struct cfg80211_registered_device *rdev)
10142 {
10143         struct cfg80211_scan_request *req = rdev->scan_req;
10144         struct nlattr *nest;
10145         int i;
10146
10147         if (WARN_ON(!req))
10148                 return 0;
10149
10150         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
10151         if (!nest)
10152                 goto nla_put_failure;
10153         for (i = 0; i < req->n_ssids; i++) {
10154                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
10155                         goto nla_put_failure;
10156         }
10157         nla_nest_end(msg, nest);
10158
10159         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10160         if (!nest)
10161                 goto nla_put_failure;
10162         for (i = 0; i < req->n_channels; i++) {
10163                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10164                         goto nla_put_failure;
10165         }
10166         nla_nest_end(msg, nest);
10167
10168         if (req->ie &&
10169             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
10170                 goto nla_put_failure;
10171
10172         if (req->flags &&
10173             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
10174                 goto nla_put_failure;
10175
10176         return 0;
10177  nla_put_failure:
10178         return -ENOBUFS;
10179 }
10180
10181 static int nl80211_send_scan_msg(struct sk_buff *msg,
10182                                  struct cfg80211_registered_device *rdev,
10183                                  struct wireless_dev *wdev,
10184                                  u32 portid, u32 seq, int flags,
10185                                  u32 cmd)
10186 {
10187         void *hdr;
10188
10189         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10190         if (!hdr)
10191                 return -1;
10192
10193         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10194             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10195                                          wdev->netdev->ifindex)) ||
10196             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10197                 goto nla_put_failure;
10198
10199         /* ignore errors and send incomplete event anyway */
10200         nl80211_add_scan_req(msg, rdev);
10201
10202         return genlmsg_end(msg, hdr);
10203
10204  nla_put_failure:
10205         genlmsg_cancel(msg, hdr);
10206         return -EMSGSIZE;
10207 }
10208
10209 static int
10210 nl80211_send_sched_scan_msg(struct sk_buff *msg,
10211                             struct cfg80211_registered_device *rdev,
10212                             struct net_device *netdev,
10213                             u32 portid, u32 seq, int flags, u32 cmd)
10214 {
10215         void *hdr;
10216
10217         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10218         if (!hdr)
10219                 return -1;
10220
10221         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10222             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10223                 goto nla_put_failure;
10224
10225         return genlmsg_end(msg, hdr);
10226
10227  nla_put_failure:
10228         genlmsg_cancel(msg, hdr);
10229         return -EMSGSIZE;
10230 }
10231
10232 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
10233                              struct wireless_dev *wdev)
10234 {
10235         struct sk_buff *msg;
10236
10237         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10238         if (!msg)
10239                 return;
10240
10241         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10242                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
10243                 nlmsg_free(msg);
10244                 return;
10245         }
10246
10247         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10248                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10249 }
10250
10251 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
10252                                        struct wireless_dev *wdev, bool aborted)
10253 {
10254         struct sk_buff *msg;
10255
10256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10257         if (!msg)
10258                 return NULL;
10259
10260         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10261                                   aborted ? NL80211_CMD_SCAN_ABORTED :
10262                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
10263                 nlmsg_free(msg);
10264                 return NULL;
10265         }
10266
10267         return msg;
10268 }
10269
10270 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
10271                               struct sk_buff *msg)
10272 {
10273         if (!msg)
10274                 return;
10275
10276         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10277                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10278 }
10279
10280 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
10281                                      struct net_device *netdev)
10282 {
10283         struct sk_buff *msg;
10284
10285         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10286         if (!msg)
10287                 return;
10288
10289         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
10290                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
10291                 nlmsg_free(msg);
10292                 return;
10293         }
10294
10295         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10296                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10297 }
10298
10299 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
10300                              struct net_device *netdev, u32 cmd)
10301 {
10302         struct sk_buff *msg;
10303
10304         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10305         if (!msg)
10306                 return;
10307
10308         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
10309                 nlmsg_free(msg);
10310                 return;
10311         }
10312
10313         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10314                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10315 }
10316
10317 /*
10318  * This can happen on global regulatory changes or device specific settings
10319  * based on custom world regulatory domains.
10320  */
10321 void nl80211_send_reg_change_event(struct regulatory_request *request)
10322 {
10323         struct sk_buff *msg;
10324         void *hdr;
10325
10326         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10327         if (!msg)
10328                 return;
10329
10330         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
10331         if (!hdr) {
10332                 nlmsg_free(msg);
10333                 return;
10334         }
10335
10336         /* Userspace can always count this one always being set */
10337         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
10338                 goto nla_put_failure;
10339
10340         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
10341                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10342                                NL80211_REGDOM_TYPE_WORLD))
10343                         goto nla_put_failure;
10344         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
10345                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10346                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
10347                         goto nla_put_failure;
10348         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
10349                    request->intersect) {
10350                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10351                                NL80211_REGDOM_TYPE_INTERSECTION))
10352                         goto nla_put_failure;
10353         } else {
10354                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10355                                NL80211_REGDOM_TYPE_COUNTRY) ||
10356                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
10357                                    request->alpha2))
10358                         goto nla_put_failure;
10359         }
10360
10361         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
10362             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
10363                 goto nla_put_failure;
10364
10365         genlmsg_end(msg, hdr);
10366
10367         rcu_read_lock();
10368         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10369                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10370         rcu_read_unlock();
10371
10372         return;
10373
10374 nla_put_failure:
10375         genlmsg_cancel(msg, hdr);
10376         nlmsg_free(msg);
10377 }
10378
10379 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
10380                                     struct net_device *netdev,
10381                                     const u8 *buf, size_t len,
10382                                     enum nl80211_commands cmd, gfp_t gfp)
10383 {
10384         struct sk_buff *msg;
10385         void *hdr;
10386
10387         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10388         if (!msg)
10389                 return;
10390
10391         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10392         if (!hdr) {
10393                 nlmsg_free(msg);
10394                 return;
10395         }
10396
10397         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10398             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10399             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10400                 goto nla_put_failure;
10401
10402         genlmsg_end(msg, hdr);
10403
10404         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10405                                 NL80211_MCGRP_MLME, gfp);
10406         return;
10407
10408  nla_put_failure:
10409         genlmsg_cancel(msg, hdr);
10410         nlmsg_free(msg);
10411 }
10412
10413 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
10414                           struct net_device *netdev, const u8 *buf,
10415                           size_t len, gfp_t gfp)
10416 {
10417         nl80211_send_mlme_event(rdev, netdev, buf, len,
10418                                 NL80211_CMD_AUTHENTICATE, gfp);
10419 }
10420
10421 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
10422                            struct net_device *netdev, const u8 *buf,
10423                            size_t len, gfp_t gfp)
10424 {
10425         nl80211_send_mlme_event(rdev, netdev, buf, len,
10426                                 NL80211_CMD_ASSOCIATE, gfp);
10427 }
10428
10429 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
10430                          struct net_device *netdev, const u8 *buf,
10431                          size_t len, gfp_t gfp)
10432 {
10433         nl80211_send_mlme_event(rdev, netdev, buf, len,
10434                                 NL80211_CMD_DEAUTHENTICATE, gfp);
10435 }
10436
10437 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
10438                            struct net_device *netdev, const u8 *buf,
10439                            size_t len, gfp_t gfp)
10440 {
10441         nl80211_send_mlme_event(rdev, netdev, buf, len,
10442                                 NL80211_CMD_DISASSOCIATE, gfp);
10443 }
10444
10445 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
10446                                   size_t len)
10447 {
10448         struct wireless_dev *wdev = dev->ieee80211_ptr;
10449         struct wiphy *wiphy = wdev->wiphy;
10450         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10451         const struct ieee80211_mgmt *mgmt = (void *)buf;
10452         u32 cmd;
10453
10454         if (WARN_ON(len < 2))
10455                 return;
10456
10457         if (ieee80211_is_deauth(mgmt->frame_control))
10458                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
10459         else
10460                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
10461
10462         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
10463         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
10464 }
10465 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
10466
10467 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
10468                                       struct net_device *netdev, int cmd,
10469                                       const u8 *addr, gfp_t gfp)
10470 {
10471         struct sk_buff *msg;
10472         void *hdr;
10473
10474         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10475         if (!msg)
10476                 return;
10477
10478         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10479         if (!hdr) {
10480                 nlmsg_free(msg);
10481                 return;
10482         }
10483
10484         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10485             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10486             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
10487             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10488                 goto nla_put_failure;
10489
10490         genlmsg_end(msg, hdr);
10491
10492         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10493                                 NL80211_MCGRP_MLME, gfp);
10494         return;
10495
10496  nla_put_failure:
10497         genlmsg_cancel(msg, hdr);
10498         nlmsg_free(msg);
10499 }
10500
10501 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10502                                struct net_device *netdev, const u8 *addr,
10503                                gfp_t gfp)
10504 {
10505         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10506                                   addr, gfp);
10507 }
10508
10509 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10510                                 struct net_device *netdev, const u8 *addr,
10511                                 gfp_t gfp)
10512 {
10513         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10514                                   addr, gfp);
10515 }
10516
10517 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10518                                  struct net_device *netdev, const u8 *bssid,
10519                                  const u8 *req_ie, size_t req_ie_len,
10520                                  const u8 *resp_ie, size_t resp_ie_len,
10521                                  u16 status, gfp_t gfp)
10522 {
10523         struct sk_buff *msg;
10524         void *hdr;
10525
10526         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10527         if (!msg)
10528                 return;
10529
10530         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10531         if (!hdr) {
10532                 nlmsg_free(msg);
10533                 return;
10534         }
10535
10536         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10537             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10538             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10539             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10540             (req_ie &&
10541              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10542             (resp_ie &&
10543              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10544                 goto nla_put_failure;
10545
10546         genlmsg_end(msg, hdr);
10547
10548         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10549                                 NL80211_MCGRP_MLME, gfp);
10550         return;
10551
10552  nla_put_failure:
10553         genlmsg_cancel(msg, hdr);
10554         nlmsg_free(msg);
10555
10556 }
10557
10558 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10559                          struct net_device *netdev, const u8 *bssid,
10560                          const u8 *req_ie, size_t req_ie_len,
10561                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10562 {
10563         struct sk_buff *msg;
10564         void *hdr;
10565
10566         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10567         if (!msg)
10568                 return;
10569
10570         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10571         if (!hdr) {
10572                 nlmsg_free(msg);
10573                 return;
10574         }
10575
10576         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10577             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10578             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10579             (req_ie &&
10580              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10581             (resp_ie &&
10582              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10583                 goto nla_put_failure;
10584
10585         genlmsg_end(msg, hdr);
10586
10587         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10588                                 NL80211_MCGRP_MLME, gfp);
10589         return;
10590
10591  nla_put_failure:
10592         genlmsg_cancel(msg, hdr);
10593         nlmsg_free(msg);
10594
10595 }
10596
10597 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10598                                struct net_device *netdev, u16 reason,
10599                                const u8 *ie, size_t ie_len, bool from_ap)
10600 {
10601         struct sk_buff *msg;
10602         void *hdr;
10603
10604         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10605         if (!msg)
10606                 return;
10607
10608         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10609         if (!hdr) {
10610                 nlmsg_free(msg);
10611                 return;
10612         }
10613
10614         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10615             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10616             (from_ap && reason &&
10617              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10618             (from_ap &&
10619              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10620             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10621                 goto nla_put_failure;
10622
10623         genlmsg_end(msg, hdr);
10624
10625         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10626                                 NL80211_MCGRP_MLME, GFP_KERNEL);
10627         return;
10628
10629  nla_put_failure:
10630         genlmsg_cancel(msg, hdr);
10631         nlmsg_free(msg);
10632
10633 }
10634
10635 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10636                              struct net_device *netdev, const u8 *bssid,
10637                              gfp_t gfp)
10638 {
10639         struct sk_buff *msg;
10640         void *hdr;
10641
10642         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10643         if (!msg)
10644                 return;
10645
10646         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10647         if (!hdr) {
10648                 nlmsg_free(msg);
10649                 return;
10650         }
10651
10652         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10653             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10654             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10655                 goto nla_put_failure;
10656
10657         genlmsg_end(msg, hdr);
10658
10659         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10660                                 NL80211_MCGRP_MLME, gfp);
10661         return;
10662
10663  nla_put_failure:
10664         genlmsg_cancel(msg, hdr);
10665         nlmsg_free(msg);
10666 }
10667
10668 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10669                                         const u8* ie, u8 ie_len, gfp_t gfp)
10670 {
10671         struct wireless_dev *wdev = dev->ieee80211_ptr;
10672         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
10673         struct sk_buff *msg;
10674         void *hdr;
10675
10676         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10677                 return;
10678
10679         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10680
10681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10682         if (!msg)
10683                 return;
10684
10685         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10686         if (!hdr) {
10687                 nlmsg_free(msg);
10688                 return;
10689         }
10690
10691         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10692             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10693             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10694             (ie_len && ie &&
10695              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10696                 goto nla_put_failure;
10697
10698         genlmsg_end(msg, hdr);
10699
10700         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10701                                 NL80211_MCGRP_MLME, gfp);
10702         return;
10703
10704  nla_put_failure:
10705         genlmsg_cancel(msg, hdr);
10706         nlmsg_free(msg);
10707 }
10708 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10709
10710 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10711                                  struct net_device *netdev, const u8 *addr,
10712                                  enum nl80211_key_type key_type, int key_id,
10713                                  const u8 *tsc, gfp_t gfp)
10714 {
10715         struct sk_buff *msg;
10716         void *hdr;
10717
10718         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10719         if (!msg)
10720                 return;
10721
10722         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10723         if (!hdr) {
10724                 nlmsg_free(msg);
10725                 return;
10726         }
10727
10728         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10729             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10730             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10731             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10732             (key_id != -1 &&
10733              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10734             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10735                 goto nla_put_failure;
10736
10737         genlmsg_end(msg, hdr);
10738
10739         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10740                                 NL80211_MCGRP_MLME, gfp);
10741         return;
10742
10743  nla_put_failure:
10744         genlmsg_cancel(msg, hdr);
10745         nlmsg_free(msg);
10746 }
10747
10748 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10749                                     struct ieee80211_channel *channel_before,
10750                                     struct ieee80211_channel *channel_after)
10751 {
10752         struct sk_buff *msg;
10753         void *hdr;
10754         struct nlattr *nl_freq;
10755
10756         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10757         if (!msg)
10758                 return;
10759
10760         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10761         if (!hdr) {
10762                 nlmsg_free(msg);
10763                 return;
10764         }
10765
10766         /*
10767          * Since we are applying the beacon hint to a wiphy we know its
10768          * wiphy_idx is valid
10769          */
10770         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10771                 goto nla_put_failure;
10772
10773         /* Before */
10774         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10775         if (!nl_freq)
10776                 goto nla_put_failure;
10777         if (nl80211_msg_put_channel(msg, channel_before, false))
10778                 goto nla_put_failure;
10779         nla_nest_end(msg, nl_freq);
10780
10781         /* After */
10782         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10783         if (!nl_freq)
10784                 goto nla_put_failure;
10785         if (nl80211_msg_put_channel(msg, channel_after, false))
10786                 goto nla_put_failure;
10787         nla_nest_end(msg, nl_freq);
10788
10789         genlmsg_end(msg, hdr);
10790
10791         rcu_read_lock();
10792         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10793                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10794         rcu_read_unlock();
10795
10796         return;
10797
10798 nla_put_failure:
10799         genlmsg_cancel(msg, hdr);
10800         nlmsg_free(msg);
10801 }
10802
10803 static void nl80211_send_remain_on_chan_event(
10804         int cmd, struct cfg80211_registered_device *rdev,
10805         struct wireless_dev *wdev, u64 cookie,
10806         struct ieee80211_channel *chan,
10807         unsigned int duration, gfp_t gfp)
10808 {
10809         struct sk_buff *msg;
10810         void *hdr;
10811
10812         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10813         if (!msg)
10814                 return;
10815
10816         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10817         if (!hdr) {
10818                 nlmsg_free(msg);
10819                 return;
10820         }
10821
10822         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10823             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10824                                          wdev->netdev->ifindex)) ||
10825             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10826             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10827             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10828                         NL80211_CHAN_NO_HT) ||
10829             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10830                 goto nla_put_failure;
10831
10832         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10833             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10834                 goto nla_put_failure;
10835
10836         genlmsg_end(msg, hdr);
10837
10838         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10839                                 NL80211_MCGRP_MLME, gfp);
10840         return;
10841
10842  nla_put_failure:
10843         genlmsg_cancel(msg, hdr);
10844         nlmsg_free(msg);
10845 }
10846
10847 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10848                                struct ieee80211_channel *chan,
10849                                unsigned int duration, gfp_t gfp)
10850 {
10851         struct wiphy *wiphy = wdev->wiphy;
10852         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10853
10854         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10855         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10856                                           rdev, wdev, cookie, chan,
10857                                           duration, gfp);
10858 }
10859 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10860
10861 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10862                                         struct ieee80211_channel *chan,
10863                                         gfp_t gfp)
10864 {
10865         struct wiphy *wiphy = wdev->wiphy;
10866         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10867
10868         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10869         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10870                                           rdev, wdev, cookie, chan, 0, gfp);
10871 }
10872 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10873
10874 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10875                       struct station_info *sinfo, gfp_t gfp)
10876 {
10877         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10878         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10879         struct sk_buff *msg;
10880
10881         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10882
10883         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10884         if (!msg)
10885                 return;
10886
10887         if (nl80211_send_station(msg, 0, 0, 0,
10888                                  rdev, dev, mac_addr, sinfo) < 0) {
10889                 nlmsg_free(msg);
10890                 return;
10891         }
10892
10893         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10894                                 NL80211_MCGRP_MLME, gfp);
10895 }
10896 EXPORT_SYMBOL(cfg80211_new_sta);
10897
10898 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10899 {
10900         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10901         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10902         struct sk_buff *msg;
10903         void *hdr;
10904
10905         trace_cfg80211_del_sta(dev, mac_addr);
10906
10907         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10908         if (!msg)
10909                 return;
10910
10911         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10912         if (!hdr) {
10913                 nlmsg_free(msg);
10914                 return;
10915         }
10916
10917         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10918             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10919                 goto nla_put_failure;
10920
10921         genlmsg_end(msg, hdr);
10922
10923         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10924                                 NL80211_MCGRP_MLME, gfp);
10925         return;
10926
10927  nla_put_failure:
10928         genlmsg_cancel(msg, hdr);
10929         nlmsg_free(msg);
10930 }
10931 EXPORT_SYMBOL(cfg80211_del_sta);
10932
10933 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10934                           enum nl80211_connect_failed_reason reason,
10935                           gfp_t gfp)
10936 {
10937         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10938         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10939         struct sk_buff *msg;
10940         void *hdr;
10941
10942         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10943         if (!msg)
10944                 return;
10945
10946         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10947         if (!hdr) {
10948                 nlmsg_free(msg);
10949                 return;
10950         }
10951
10952         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10953             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10954             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10955                 goto nla_put_failure;
10956
10957         genlmsg_end(msg, hdr);
10958
10959         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10960                                 NL80211_MCGRP_MLME, gfp);
10961         return;
10962
10963  nla_put_failure:
10964         genlmsg_cancel(msg, hdr);
10965         nlmsg_free(msg);
10966 }
10967 EXPORT_SYMBOL(cfg80211_conn_failed);
10968
10969 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10970                                        const u8 *addr, gfp_t gfp)
10971 {
10972         struct wireless_dev *wdev = dev->ieee80211_ptr;
10973         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
10974         struct sk_buff *msg;
10975         void *hdr;
10976         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10977
10978         if (!nlportid)
10979                 return false;
10980
10981         msg = nlmsg_new(100, gfp);
10982         if (!msg)
10983                 return true;
10984
10985         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10986         if (!hdr) {
10987                 nlmsg_free(msg);
10988                 return true;
10989         }
10990
10991         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10992             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10993             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10994                 goto nla_put_failure;
10995
10996         genlmsg_end(msg, hdr);
10997         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10998         return true;
10999
11000  nla_put_failure:
11001         genlmsg_cancel(msg, hdr);
11002         nlmsg_free(msg);
11003         return true;
11004 }
11005
11006 bool cfg80211_rx_spurious_frame(struct net_device *dev,
11007                                 const u8 *addr, gfp_t gfp)
11008 {
11009         struct wireless_dev *wdev = dev->ieee80211_ptr;
11010         bool ret;
11011
11012         trace_cfg80211_rx_spurious_frame(dev, addr);
11013
11014         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11015                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
11016                 trace_cfg80211_return_bool(false);
11017                 return false;
11018         }
11019         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
11020                                          addr, gfp);
11021         trace_cfg80211_return_bool(ret);
11022         return ret;
11023 }
11024 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
11025
11026 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
11027                                         const u8 *addr, gfp_t gfp)
11028 {
11029         struct wireless_dev *wdev = dev->ieee80211_ptr;
11030         bool ret;
11031
11032         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
11033
11034         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11035                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11036                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
11037                 trace_cfg80211_return_bool(false);
11038                 return false;
11039         }
11040         ret = __nl80211_unexpected_frame(dev,
11041                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
11042                                          addr, gfp);
11043         trace_cfg80211_return_bool(ret);
11044         return ret;
11045 }
11046 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
11047
11048 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
11049                       struct wireless_dev *wdev, u32 nlportid,
11050                       int freq, int sig_dbm,
11051                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
11052 {
11053         struct net_device *netdev = wdev->netdev;
11054         struct sk_buff *msg;
11055         void *hdr;
11056
11057         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11058         if (!msg)
11059                 return -ENOMEM;
11060
11061         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11062         if (!hdr) {
11063                 nlmsg_free(msg);
11064                 return -ENOMEM;
11065         }
11066
11067         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11068             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11069                                         netdev->ifindex)) ||
11070             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11071             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
11072             (sig_dbm &&
11073              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11074             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11075             (flags &&
11076              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
11077                 goto nla_put_failure;
11078
11079         genlmsg_end(msg, hdr);
11080
11081         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11082
11083  nla_put_failure:
11084         genlmsg_cancel(msg, hdr);
11085         nlmsg_free(msg);
11086         return -ENOBUFS;
11087 }
11088
11089 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
11090                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
11091 {
11092         struct wiphy *wiphy = wdev->wiphy;
11093         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11094         struct net_device *netdev = wdev->netdev;
11095         struct sk_buff *msg;
11096         void *hdr;
11097
11098         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
11099
11100         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11101         if (!msg)
11102                 return;
11103
11104         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
11105         if (!hdr) {
11106                 nlmsg_free(msg);
11107                 return;
11108         }
11109
11110         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11111             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11112                                    netdev->ifindex)) ||
11113             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11114             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11115             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11116             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
11117                 goto nla_put_failure;
11118
11119         genlmsg_end(msg, hdr);
11120
11121         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11122                                 NL80211_MCGRP_MLME, gfp);
11123         return;
11124
11125  nla_put_failure:
11126         genlmsg_cancel(msg, hdr);
11127         nlmsg_free(msg);
11128 }
11129 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
11130
11131 void cfg80211_cqm_rssi_notify(struct net_device *dev,
11132                               enum nl80211_cqm_rssi_threshold_event rssi_event,
11133                               gfp_t gfp)
11134 {
11135         struct wireless_dev *wdev = dev->ieee80211_ptr;
11136         struct wiphy *wiphy = wdev->wiphy;
11137         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11138         struct sk_buff *msg;
11139         struct nlattr *pinfoattr;
11140         void *hdr;
11141
11142         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
11143
11144         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11145         if (!msg)
11146                 return;
11147
11148         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11149         if (!hdr) {
11150                 nlmsg_free(msg);
11151                 return;
11152         }
11153
11154         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11155             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
11156                 goto nla_put_failure;
11157
11158         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11159         if (!pinfoattr)
11160                 goto nla_put_failure;
11161
11162         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
11163                         rssi_event))
11164                 goto nla_put_failure;
11165
11166         nla_nest_end(msg, pinfoattr);
11167
11168         genlmsg_end(msg, hdr);
11169
11170         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11171                                 NL80211_MCGRP_MLME, gfp);
11172         return;
11173
11174  nla_put_failure:
11175         genlmsg_cancel(msg, hdr);
11176         nlmsg_free(msg);
11177 }
11178 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
11179
11180 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
11181                                      struct net_device *netdev, const u8 *bssid,
11182                                      const u8 *replay_ctr, gfp_t gfp)
11183 {
11184         struct sk_buff *msg;
11185         struct nlattr *rekey_attr;
11186         void *hdr;
11187
11188         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11189         if (!msg)
11190                 return;
11191
11192         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
11193         if (!hdr) {
11194                 nlmsg_free(msg);
11195                 return;
11196         }
11197
11198         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11199             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11200             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11201                 goto nla_put_failure;
11202
11203         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
11204         if (!rekey_attr)
11205                 goto nla_put_failure;
11206
11207         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
11208                     NL80211_REPLAY_CTR_LEN, replay_ctr))
11209                 goto nla_put_failure;
11210
11211         nla_nest_end(msg, rekey_attr);
11212
11213         genlmsg_end(msg, hdr);
11214
11215         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11216                                 NL80211_MCGRP_MLME, gfp);
11217         return;
11218
11219  nla_put_failure:
11220         genlmsg_cancel(msg, hdr);
11221         nlmsg_free(msg);
11222 }
11223
11224 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
11225                                const u8 *replay_ctr, gfp_t gfp)
11226 {
11227         struct wireless_dev *wdev = dev->ieee80211_ptr;
11228         struct wiphy *wiphy = wdev->wiphy;
11229         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11230
11231         trace_cfg80211_gtk_rekey_notify(dev, bssid);
11232         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
11233 }
11234 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
11235
11236 static void
11237 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
11238                                struct net_device *netdev, int index,
11239                                const u8 *bssid, bool preauth, gfp_t gfp)
11240 {
11241         struct sk_buff *msg;
11242         struct nlattr *attr;
11243         void *hdr;
11244
11245         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11246         if (!msg)
11247                 return;
11248
11249         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
11250         if (!hdr) {
11251                 nlmsg_free(msg);
11252                 return;
11253         }
11254
11255         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11256             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11257                 goto nla_put_failure;
11258
11259         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
11260         if (!attr)
11261                 goto nla_put_failure;
11262
11263         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
11264             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
11265             (preauth &&
11266              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
11267                 goto nla_put_failure;
11268
11269         nla_nest_end(msg, attr);
11270
11271         genlmsg_end(msg, hdr);
11272
11273         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11274                                 NL80211_MCGRP_MLME, gfp);
11275         return;
11276
11277  nla_put_failure:
11278         genlmsg_cancel(msg, hdr);
11279         nlmsg_free(msg);
11280 }
11281
11282 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
11283                                      const u8 *bssid, bool preauth, gfp_t gfp)
11284 {
11285         struct wireless_dev *wdev = dev->ieee80211_ptr;
11286         struct wiphy *wiphy = wdev->wiphy;
11287         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11288
11289         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
11290         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
11291 }
11292 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
11293
11294 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
11295                                      struct net_device *netdev,
11296                                      struct cfg80211_chan_def *chandef,
11297                                      gfp_t gfp)
11298 {
11299         struct sk_buff *msg;
11300         void *hdr;
11301
11302         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11303         if (!msg)
11304                 return;
11305
11306         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
11307         if (!hdr) {
11308                 nlmsg_free(msg);
11309                 return;
11310         }
11311
11312         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11313                 goto nla_put_failure;
11314
11315         if (nl80211_send_chandef(msg, chandef))
11316                 goto nla_put_failure;
11317
11318         genlmsg_end(msg, hdr);
11319
11320         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11321                                 NL80211_MCGRP_MLME, gfp);
11322         return;
11323
11324  nla_put_failure:
11325         genlmsg_cancel(msg, hdr);
11326         nlmsg_free(msg);
11327 }
11328
11329 void cfg80211_ch_switch_notify(struct net_device *dev,
11330                                struct cfg80211_chan_def *chandef)
11331 {
11332         struct wireless_dev *wdev = dev->ieee80211_ptr;
11333         struct wiphy *wiphy = wdev->wiphy;
11334         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11335
11336         ASSERT_WDEV_LOCK(wdev);
11337
11338         trace_cfg80211_ch_switch_notify(dev, chandef);
11339
11340         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11341                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11342                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
11343                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11344                 return;
11345
11346         wdev->chandef = *chandef;
11347         wdev->preset_chandef = *chandef;
11348         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
11349 }
11350 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
11351
11352 void cfg80211_cqm_txe_notify(struct net_device *dev,
11353                              const u8 *peer, u32 num_packets,
11354                              u32 rate, u32 intvl, gfp_t gfp)
11355 {
11356         struct wireless_dev *wdev = dev->ieee80211_ptr;
11357         struct wiphy *wiphy = wdev->wiphy;
11358         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11359         struct sk_buff *msg;
11360         struct nlattr *pinfoattr;
11361         void *hdr;
11362
11363         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
11364         if (!msg)
11365                 return;
11366
11367         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11368         if (!hdr) {
11369                 nlmsg_free(msg);
11370                 return;
11371         }
11372
11373         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11374             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11375             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11376                 goto nla_put_failure;
11377
11378         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11379         if (!pinfoattr)
11380                 goto nla_put_failure;
11381
11382         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
11383                 goto nla_put_failure;
11384
11385         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
11386                 goto nla_put_failure;
11387
11388         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
11389                 goto nla_put_failure;
11390
11391         nla_nest_end(msg, pinfoattr);
11392
11393         genlmsg_end(msg, hdr);
11394
11395         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11396                                 NL80211_MCGRP_MLME, gfp);
11397         return;
11398
11399  nla_put_failure:
11400         genlmsg_cancel(msg, hdr);
11401         nlmsg_free(msg);
11402 }
11403 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11404
11405 void
11406 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
11407                      const struct cfg80211_chan_def *chandef,
11408                      enum nl80211_radar_event event,
11409                      struct net_device *netdev, gfp_t gfp)
11410 {
11411         struct sk_buff *msg;
11412         void *hdr;
11413
11414         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11415         if (!msg)
11416                 return;
11417
11418         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
11419         if (!hdr) {
11420                 nlmsg_free(msg);
11421                 return;
11422         }
11423
11424         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
11425                 goto nla_put_failure;
11426
11427         /* NOP and radar events don't need a netdev parameter */
11428         if (netdev) {
11429                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
11430
11431                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11432                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11433                         goto nla_put_failure;
11434         }
11435
11436         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
11437                 goto nla_put_failure;
11438
11439         if (nl80211_send_chandef(msg, chandef))
11440                 goto nla_put_failure;
11441
11442         genlmsg_end(msg, hdr);
11443
11444         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11445                                 NL80211_MCGRP_MLME, gfp);
11446         return;
11447
11448  nla_put_failure:
11449         genlmsg_cancel(msg, hdr);
11450         nlmsg_free(msg);
11451 }
11452
11453 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11454                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11455 {
11456         struct wireless_dev *wdev = dev->ieee80211_ptr;
11457         struct wiphy *wiphy = wdev->wiphy;
11458         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11459         struct sk_buff *msg;
11460         struct nlattr *pinfoattr;
11461         void *hdr;
11462
11463         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11464
11465         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11466         if (!msg)
11467                 return;
11468
11469         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11470         if (!hdr) {
11471                 nlmsg_free(msg);
11472                 return;
11473         }
11474
11475         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11476             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11477             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11478                 goto nla_put_failure;
11479
11480         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11481         if (!pinfoattr)
11482                 goto nla_put_failure;
11483
11484         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11485                 goto nla_put_failure;
11486
11487         nla_nest_end(msg, pinfoattr);
11488
11489         genlmsg_end(msg, hdr);
11490
11491         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11492                                 NL80211_MCGRP_MLME, gfp);
11493         return;
11494
11495  nla_put_failure:
11496         genlmsg_cancel(msg, hdr);
11497         nlmsg_free(msg);
11498 }
11499 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11500
11501 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11502                            u64 cookie, bool acked, gfp_t gfp)
11503 {
11504         struct wireless_dev *wdev = dev->ieee80211_ptr;
11505         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11506         struct sk_buff *msg;
11507         void *hdr;
11508
11509         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11510
11511         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11512
11513         if (!msg)
11514                 return;
11515
11516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11517         if (!hdr) {
11518                 nlmsg_free(msg);
11519                 return;
11520         }
11521
11522         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11523             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11524             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11525             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11526             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11527                 goto nla_put_failure;
11528
11529         genlmsg_end(msg, hdr);
11530
11531         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11532                                 NL80211_MCGRP_MLME, gfp);
11533         return;
11534
11535  nla_put_failure:
11536         genlmsg_cancel(msg, hdr);
11537         nlmsg_free(msg);
11538 }
11539 EXPORT_SYMBOL(cfg80211_probe_status);
11540
11541 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11542                                  const u8 *frame, size_t len,
11543                                  int freq, int sig_dbm)
11544 {
11545         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11546         struct sk_buff *msg;
11547         void *hdr;
11548         struct cfg80211_beacon_registration *reg;
11549
11550         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11551
11552         spin_lock_bh(&rdev->beacon_registrations_lock);
11553         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11554                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11555                 if (!msg) {
11556                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11557                         return;
11558                 }
11559
11560                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11561                 if (!hdr)
11562                         goto nla_put_failure;
11563
11564                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11565                     (freq &&
11566                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11567                     (sig_dbm &&
11568                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11569                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11570                         goto nla_put_failure;
11571
11572                 genlmsg_end(msg, hdr);
11573
11574                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11575         }
11576         spin_unlock_bh(&rdev->beacon_registrations_lock);
11577         return;
11578
11579  nla_put_failure:
11580         spin_unlock_bh(&rdev->beacon_registrations_lock);
11581         if (hdr)
11582                 genlmsg_cancel(msg, hdr);
11583         nlmsg_free(msg);
11584 }
11585 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11586
11587 #ifdef CONFIG_PM
11588 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11589                                    struct cfg80211_wowlan_wakeup *wakeup,
11590                                    gfp_t gfp)
11591 {
11592         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11593         struct sk_buff *msg;
11594         void *hdr;
11595         int size = 200;
11596
11597         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11598
11599         if (wakeup)
11600                 size += wakeup->packet_present_len;
11601
11602         msg = nlmsg_new(size, gfp);
11603         if (!msg)
11604                 return;
11605
11606         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11607         if (!hdr)
11608                 goto free_msg;
11609
11610         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11611             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11612                 goto free_msg;
11613
11614         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11615                                         wdev->netdev->ifindex))
11616                 goto free_msg;
11617
11618         if (wakeup) {
11619                 struct nlattr *reasons;
11620
11621                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11622                 if (!reasons)
11623                         goto free_msg;
11624
11625                 if (wakeup->disconnect &&
11626                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11627                         goto free_msg;
11628                 if (wakeup->magic_pkt &&
11629                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11630                         goto free_msg;
11631                 if (wakeup->gtk_rekey_failure &&
11632                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11633                         goto free_msg;
11634                 if (wakeup->eap_identity_req &&
11635                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11636                         goto free_msg;
11637                 if (wakeup->four_way_handshake &&
11638                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11639                         goto free_msg;
11640                 if (wakeup->rfkill_release &&
11641                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11642                         goto free_msg;
11643
11644                 if (wakeup->pattern_idx >= 0 &&
11645                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11646                                 wakeup->pattern_idx))
11647                         goto free_msg;
11648
11649                 if (wakeup->tcp_match &&
11650                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
11651                         goto free_msg;
11652
11653                 if (wakeup->tcp_connlost &&
11654                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
11655                         goto free_msg;
11656
11657                 if (wakeup->tcp_nomoretokens &&
11658                     nla_put_flag(msg,
11659                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
11660                         goto free_msg;
11661
11662                 if (wakeup->packet) {
11663                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11664                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11665
11666                         if (!wakeup->packet_80211) {
11667                                 pkt_attr =
11668                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11669                                 len_attr =
11670                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11671                         }
11672
11673                         if (wakeup->packet_len &&
11674                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11675                                 goto free_msg;
11676
11677                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11678                                     wakeup->packet))
11679                                 goto free_msg;
11680                 }
11681
11682                 nla_nest_end(msg, reasons);
11683         }
11684
11685         genlmsg_end(msg, hdr);
11686
11687         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11688                                 NL80211_MCGRP_MLME, gfp);
11689         return;
11690
11691  free_msg:
11692         nlmsg_free(msg);
11693 }
11694 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11695 #endif
11696
11697 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11698                                 enum nl80211_tdls_operation oper,
11699                                 u16 reason_code, gfp_t gfp)
11700 {
11701         struct wireless_dev *wdev = dev->ieee80211_ptr;
11702         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11703         struct sk_buff *msg;
11704         void *hdr;
11705
11706         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11707                                          reason_code);
11708
11709         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11710         if (!msg)
11711                 return;
11712
11713         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11714         if (!hdr) {
11715                 nlmsg_free(msg);
11716                 return;
11717         }
11718
11719         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11720             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11721             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11722             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11723             (reason_code > 0 &&
11724              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11725                 goto nla_put_failure;
11726
11727         genlmsg_end(msg, hdr);
11728
11729         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11730                                 NL80211_MCGRP_MLME, gfp);
11731         return;
11732
11733  nla_put_failure:
11734         genlmsg_cancel(msg, hdr);
11735         nlmsg_free(msg);
11736 }
11737 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11738
11739 static int nl80211_netlink_notify(struct notifier_block * nb,
11740                                   unsigned long state,
11741                                   void *_notify)
11742 {
11743         struct netlink_notify *notify = _notify;
11744         struct cfg80211_registered_device *rdev;
11745         struct wireless_dev *wdev;
11746         struct cfg80211_beacon_registration *reg, *tmp;
11747
11748         if (state != NETLINK_URELEASE)
11749                 return NOTIFY_DONE;
11750
11751         rcu_read_lock();
11752
11753         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11754                 bool schedule_destroy_work = false;
11755
11756                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
11757                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11758
11759                         if (wdev->owner_nlportid == notify->portid)
11760                                 schedule_destroy_work = true;
11761                 }
11762
11763                 spin_lock_bh(&rdev->beacon_registrations_lock);
11764                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11765                                          list) {
11766                         if (reg->nlportid == notify->portid) {
11767                                 list_del(&reg->list);
11768                                 kfree(reg);
11769                                 break;
11770                         }
11771                 }
11772                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11773
11774                 if (schedule_destroy_work) {
11775                         struct cfg80211_iface_destroy *destroy;
11776
11777                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
11778                         if (destroy) {
11779                                 destroy->nlportid = notify->portid;
11780                                 spin_lock(&rdev->destroy_list_lock);
11781                                 list_add(&destroy->list, &rdev->destroy_list);
11782                                 spin_unlock(&rdev->destroy_list_lock);
11783                                 schedule_work(&rdev->destroy_work);
11784                         }
11785                 }
11786         }
11787
11788         rcu_read_unlock();
11789
11790         return NOTIFY_OK;
11791 }
11792
11793 static struct notifier_block nl80211_netlink_notifier = {
11794         .notifier_call = nl80211_netlink_notify,
11795 };
11796
11797 void cfg80211_ft_event(struct net_device *netdev,
11798                        struct cfg80211_ft_event_params *ft_event)
11799 {
11800         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11801         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11802         struct sk_buff *msg;
11803         void *hdr;
11804
11805         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11806
11807         if (!ft_event->target_ap)
11808                 return;
11809
11810         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11811         if (!msg)
11812                 return;
11813
11814         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11815         if (!hdr)
11816                 goto out;
11817
11818         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11819             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11820             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
11821                 goto out;
11822
11823         if (ft_event->ies &&
11824             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
11825                 goto out;
11826         if (ft_event->ric_ies &&
11827             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11828                     ft_event->ric_ies))
11829                 goto out;
11830
11831         genlmsg_end(msg, hdr);
11832
11833         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11834                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11835         return;
11836  out:
11837         nlmsg_free(msg);
11838 }
11839 EXPORT_SYMBOL(cfg80211_ft_event);
11840
11841 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11842 {
11843         struct cfg80211_registered_device *rdev;
11844         struct sk_buff *msg;
11845         void *hdr;
11846         u32 nlportid;
11847
11848         rdev = wiphy_to_rdev(wdev->wiphy);
11849         if (!rdev->crit_proto_nlportid)
11850                 return;
11851
11852         nlportid = rdev->crit_proto_nlportid;
11853         rdev->crit_proto_nlportid = 0;
11854
11855         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11856         if (!msg)
11857                 return;
11858
11859         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11860         if (!hdr)
11861                 goto nla_put_failure;
11862
11863         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11864             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11865                 goto nla_put_failure;
11866
11867         genlmsg_end(msg, hdr);
11868
11869         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11870         return;
11871
11872  nla_put_failure:
11873         if (hdr)
11874                 genlmsg_cancel(msg, hdr);
11875         nlmsg_free(msg);
11876
11877 }
11878 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11879
11880 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
11881 {
11882         struct wiphy *wiphy = wdev->wiphy;
11883         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11884         struct sk_buff *msg;
11885         void *hdr;
11886
11887         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11888         if (!msg)
11889                 return;
11890
11891         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
11892         if (!hdr)
11893                 goto out;
11894
11895         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11896             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
11897             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11898                 goto out;
11899
11900         genlmsg_end(msg, hdr);
11901
11902         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
11903                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11904         return;
11905  out:
11906         nlmsg_free(msg);
11907 }
11908
11909 /* initialisation/exit functions */
11910
11911 int nl80211_init(void)
11912 {
11913         int err;
11914
11915         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
11916                                                    nl80211_mcgrps);
11917         if (err)
11918                 return err;
11919
11920         err = netlink_register_notifier(&nl80211_netlink_notifier);
11921         if (err)
11922                 goto err_out;
11923
11924         return 0;
11925  err_out:
11926         genl_unregister_family(&nl80211_fam);
11927         return err;
11928 }
11929
11930 void nl80211_exit(void)
11931 {
11932         netlink_unregister_notifier(&nl80211_netlink_notifier);
11933         genl_unregister_family(&nl80211_fam);
11934 }