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         bool tsf = false;
6037
6038         ASSERT_WDEV_LOCK(wdev);
6039
6040         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6041                              NL80211_CMD_NEW_SCAN_RESULTS);
6042         if (!hdr)
6043                 return -1;
6044
6045         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6046
6047         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6048                 goto nla_put_failure;
6049         if (wdev->netdev &&
6050             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6051                 goto nla_put_failure;
6052         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6053                 goto nla_put_failure;
6054
6055         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6056         if (!bss)
6057                 goto nla_put_failure;
6058         if ((!is_zero_ether_addr(res->bssid) &&
6059              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6060                 goto nla_put_failure;
6061
6062         rcu_read_lock();
6063         ies = rcu_dereference(res->ies);
6064         if (ies) {
6065                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6066                         goto fail_unlock_rcu;
6067                 tsf = true;
6068                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6069                                         ies->len, ies->data))
6070                         goto fail_unlock_rcu;
6071         }
6072         ies = rcu_dereference(res->beacon_ies);
6073         if (ies) {
6074                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6075                         goto fail_unlock_rcu;
6076                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6077                                         ies->len, ies->data))
6078                         goto fail_unlock_rcu;
6079         }
6080         rcu_read_unlock();
6081
6082         if (res->beacon_interval &&
6083             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6084                 goto nla_put_failure;
6085         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6086             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6087             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6088             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6089                         jiffies_to_msecs(jiffies - intbss->ts)))
6090                 goto nla_put_failure;
6091
6092         switch (rdev->wiphy.signal_type) {
6093         case CFG80211_SIGNAL_TYPE_MBM:
6094                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6095                         goto nla_put_failure;
6096                 break;
6097         case CFG80211_SIGNAL_TYPE_UNSPEC:
6098                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6099                         goto nla_put_failure;
6100                 break;
6101         default:
6102                 break;
6103         }
6104
6105         switch (wdev->iftype) {
6106         case NL80211_IFTYPE_P2P_CLIENT:
6107         case NL80211_IFTYPE_STATION:
6108                 if (intbss == wdev->current_bss &&
6109                     nla_put_u32(msg, NL80211_BSS_STATUS,
6110                                 NL80211_BSS_STATUS_ASSOCIATED))
6111                         goto nla_put_failure;
6112                 break;
6113         case NL80211_IFTYPE_ADHOC:
6114                 if (intbss == wdev->current_bss &&
6115                     nla_put_u32(msg, NL80211_BSS_STATUS,
6116                                 NL80211_BSS_STATUS_IBSS_JOINED))
6117                         goto nla_put_failure;
6118                 break;
6119         default:
6120                 break;
6121         }
6122
6123         nla_nest_end(msg, bss);
6124
6125         return genlmsg_end(msg, hdr);
6126
6127  fail_unlock_rcu:
6128         rcu_read_unlock();
6129  nla_put_failure:
6130         genlmsg_cancel(msg, hdr);
6131         return -EMSGSIZE;
6132 }
6133
6134 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6135 {
6136         struct cfg80211_registered_device *rdev;
6137         struct cfg80211_internal_bss *scan;
6138         struct wireless_dev *wdev;
6139         int start = cb->args[2], idx = 0;
6140         int err;
6141
6142         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6143         if (err)
6144                 return err;
6145
6146         wdev_lock(wdev);
6147         spin_lock_bh(&rdev->bss_lock);
6148         cfg80211_bss_expire(rdev);
6149
6150         cb->seq = rdev->bss_generation;
6151
6152         list_for_each_entry(scan, &rdev->bss_list, list) {
6153                 if (++idx <= start)
6154                         continue;
6155                 if (nl80211_send_bss(skb, cb,
6156                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6157                                 rdev, wdev, scan) < 0) {
6158                         idx--;
6159                         break;
6160                 }
6161         }
6162
6163         spin_unlock_bh(&rdev->bss_lock);
6164         wdev_unlock(wdev);
6165
6166         cb->args[2] = idx;
6167         nl80211_finish_wdev_dump(rdev);
6168
6169         return skb->len;
6170 }
6171
6172 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6173                                 int flags, struct net_device *dev,
6174                                 struct survey_info *survey)
6175 {
6176         void *hdr;
6177         struct nlattr *infoattr;
6178
6179         hdr = nl80211hdr_put(msg, portid, seq, flags,
6180                              NL80211_CMD_NEW_SURVEY_RESULTS);
6181         if (!hdr)
6182                 return -ENOMEM;
6183
6184         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6185                 goto nla_put_failure;
6186
6187         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6188         if (!infoattr)
6189                 goto nla_put_failure;
6190
6191         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6192                         survey->channel->center_freq))
6193                 goto nla_put_failure;
6194
6195         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6196             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6197                 goto nla_put_failure;
6198         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6199             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6200                 goto nla_put_failure;
6201         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6202             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6203                         survey->channel_time))
6204                 goto nla_put_failure;
6205         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6206             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6207                         survey->channel_time_busy))
6208                 goto nla_put_failure;
6209         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6210             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6211                         survey->channel_time_ext_busy))
6212                 goto nla_put_failure;
6213         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6214             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6215                         survey->channel_time_rx))
6216                 goto nla_put_failure;
6217         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6218             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6219                         survey->channel_time_tx))
6220                 goto nla_put_failure;
6221
6222         nla_nest_end(msg, infoattr);
6223
6224         return genlmsg_end(msg, hdr);
6225
6226  nla_put_failure:
6227         genlmsg_cancel(msg, hdr);
6228         return -EMSGSIZE;
6229 }
6230
6231 static int nl80211_dump_survey(struct sk_buff *skb,
6232                         struct netlink_callback *cb)
6233 {
6234         struct survey_info survey;
6235         struct cfg80211_registered_device *rdev;
6236         struct wireless_dev *wdev;
6237         int survey_idx = cb->args[2];
6238         int res;
6239
6240         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6241         if (res)
6242                 return res;
6243
6244         if (!wdev->netdev) {
6245                 res = -EINVAL;
6246                 goto out_err;
6247         }
6248
6249         if (!rdev->ops->dump_survey) {
6250                 res = -EOPNOTSUPP;
6251                 goto out_err;
6252         }
6253
6254         while (1) {
6255                 struct ieee80211_channel *chan;
6256
6257                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6258                 if (res == -ENOENT)
6259                         break;
6260                 if (res)
6261                         goto out_err;
6262
6263                 /* Survey without a channel doesn't make sense */
6264                 if (!survey.channel) {
6265                         res = -EINVAL;
6266                         goto out;
6267                 }
6268
6269                 chan = ieee80211_get_channel(&rdev->wiphy,
6270                                              survey.channel->center_freq);
6271                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6272                         survey_idx++;
6273                         continue;
6274                 }
6275
6276                 if (nl80211_send_survey(skb,
6277                                 NETLINK_CB(cb->skb).portid,
6278                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6279                                 wdev->netdev, &survey) < 0)
6280                         goto out;
6281                 survey_idx++;
6282         }
6283
6284  out:
6285         cb->args[2] = survey_idx;
6286         res = skb->len;
6287  out_err:
6288         nl80211_finish_wdev_dump(rdev);
6289         return res;
6290 }
6291
6292 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6293 {
6294         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6295                                   NL80211_WPA_VERSION_2));
6296 }
6297
6298 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6299 {
6300         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6301         struct net_device *dev = info->user_ptr[1];
6302         struct ieee80211_channel *chan;
6303         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6304         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6305         enum nl80211_auth_type auth_type;
6306         struct key_parse key;
6307         bool local_state_change;
6308
6309         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6310                 return -EINVAL;
6311
6312         if (!info->attrs[NL80211_ATTR_MAC])
6313                 return -EINVAL;
6314
6315         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6316                 return -EINVAL;
6317
6318         if (!info->attrs[NL80211_ATTR_SSID])
6319                 return -EINVAL;
6320
6321         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6322                 return -EINVAL;
6323
6324         err = nl80211_parse_key(info, &key);
6325         if (err)
6326                 return err;
6327
6328         if (key.idx >= 0) {
6329                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6330                         return -EINVAL;
6331                 if (!key.p.key || !key.p.key_len)
6332                         return -EINVAL;
6333                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6334                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6335                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6336                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6337                         return -EINVAL;
6338                 if (key.idx > 4)
6339                         return -EINVAL;
6340         } else {
6341                 key.p.key_len = 0;
6342                 key.p.key = NULL;
6343         }
6344
6345         if (key.idx >= 0) {
6346                 int i;
6347                 bool ok = false;
6348                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6349                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6350                                 ok = true;
6351                                 break;
6352                         }
6353                 }
6354                 if (!ok)
6355                         return -EINVAL;
6356         }
6357
6358         if (!rdev->ops->auth)
6359                 return -EOPNOTSUPP;
6360
6361         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6362             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6363                 return -EOPNOTSUPP;
6364
6365         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6366         chan = nl80211_get_valid_chan(&rdev->wiphy,
6367                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6368         if (!chan)
6369                 return -EINVAL;
6370
6371         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6372         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6373
6374         if (info->attrs[NL80211_ATTR_IE]) {
6375                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6376                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6377         }
6378
6379         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6380         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6381                 return -EINVAL;
6382
6383         if (auth_type == NL80211_AUTHTYPE_SAE &&
6384             !info->attrs[NL80211_ATTR_SAE_DATA])
6385                 return -EINVAL;
6386
6387         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6388                 if (auth_type != NL80211_AUTHTYPE_SAE)
6389                         return -EINVAL;
6390                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6391                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6392                 /* need to include at least Auth Transaction and Status Code */
6393                 if (sae_data_len < 4)
6394                         return -EINVAL;
6395         }
6396
6397         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6398
6399         /*
6400          * Since we no longer track auth state, ignore
6401          * requests to only change local state.
6402          */
6403         if (local_state_change)
6404                 return 0;
6405
6406         wdev_lock(dev->ieee80211_ptr);
6407         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6408                                  ssid, ssid_len, ie, ie_len,
6409                                  key.p.key, key.p.key_len, key.idx,
6410                                  sae_data, sae_data_len);
6411         wdev_unlock(dev->ieee80211_ptr);
6412         return err;
6413 }
6414
6415 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6416                                    struct genl_info *info,
6417                                    struct cfg80211_crypto_settings *settings,
6418                                    int cipher_limit)
6419 {
6420         memset(settings, 0, sizeof(*settings));
6421
6422         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6423
6424         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6425                 u16 proto;
6426                 proto = nla_get_u16(
6427                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6428                 settings->control_port_ethertype = cpu_to_be16(proto);
6429                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6430                     proto != ETH_P_PAE)
6431                         return -EINVAL;
6432                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6433                         settings->control_port_no_encrypt = true;
6434         } else
6435                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6436
6437         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6438                 void *data;
6439                 int len, i;
6440
6441                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6442                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6443                 settings->n_ciphers_pairwise = len / sizeof(u32);
6444
6445                 if (len % sizeof(u32))
6446                         return -EINVAL;
6447
6448                 if (settings->n_ciphers_pairwise > cipher_limit)
6449                         return -EINVAL;
6450
6451                 memcpy(settings->ciphers_pairwise, data, len);
6452
6453                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6454                         if (!cfg80211_supported_cipher_suite(
6455                                         &rdev->wiphy,
6456                                         settings->ciphers_pairwise[i]))
6457                                 return -EINVAL;
6458         }
6459
6460         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6461                 settings->cipher_group =
6462                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6463                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6464                                                      settings->cipher_group))
6465                         return -EINVAL;
6466         }
6467
6468         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6469                 settings->wpa_versions =
6470                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6471                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6472                         return -EINVAL;
6473         }
6474
6475         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6476                 void *data;
6477                 int len;
6478
6479                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6480                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6481                 settings->n_akm_suites = len / sizeof(u32);
6482
6483                 if (len % sizeof(u32))
6484                         return -EINVAL;
6485
6486                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6487                         return -EINVAL;
6488
6489                 memcpy(settings->akm_suites, data, len);
6490         }
6491
6492         return 0;
6493 }
6494
6495 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6496 {
6497         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6498         struct net_device *dev = info->user_ptr[1];
6499         struct ieee80211_channel *chan;
6500         struct cfg80211_assoc_request req = {};
6501         const u8 *bssid, *ssid;
6502         int err, ssid_len = 0;
6503
6504         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6505                 return -EINVAL;
6506
6507         if (!info->attrs[NL80211_ATTR_MAC] ||
6508             !info->attrs[NL80211_ATTR_SSID] ||
6509             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6510                 return -EINVAL;
6511
6512         if (!rdev->ops->assoc)
6513                 return -EOPNOTSUPP;
6514
6515         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6516             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6517                 return -EOPNOTSUPP;
6518
6519         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6520
6521         chan = nl80211_get_valid_chan(&rdev->wiphy,
6522                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6523         if (!chan)
6524                 return -EINVAL;
6525
6526         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6527         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6528
6529         if (info->attrs[NL80211_ATTR_IE]) {
6530                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6531                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6532         }
6533
6534         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6535                 enum nl80211_mfp mfp =
6536                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6537                 if (mfp == NL80211_MFP_REQUIRED)
6538                         req.use_mfp = true;
6539                 else if (mfp != NL80211_MFP_NO)
6540                         return -EINVAL;
6541         }
6542
6543         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6544                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6545
6546         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6547                 req.flags |= ASSOC_REQ_DISABLE_HT;
6548
6549         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6550                 memcpy(&req.ht_capa_mask,
6551                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6552                        sizeof(req.ht_capa_mask));
6553
6554         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6555                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6556                         return -EINVAL;
6557                 memcpy(&req.ht_capa,
6558                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6559                        sizeof(req.ht_capa));
6560         }
6561
6562         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6563                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6564
6565         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6566                 memcpy(&req.vht_capa_mask,
6567                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6568                        sizeof(req.vht_capa_mask));
6569
6570         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6571                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6572                         return -EINVAL;
6573                 memcpy(&req.vht_capa,
6574                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6575                        sizeof(req.vht_capa));
6576         }
6577
6578         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6579         if (!err) {
6580                 wdev_lock(dev->ieee80211_ptr);
6581                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6582                                           ssid, ssid_len, &req);
6583                 wdev_unlock(dev->ieee80211_ptr);
6584         }
6585
6586         return err;
6587 }
6588
6589 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6590 {
6591         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6592         struct net_device *dev = info->user_ptr[1];
6593         const u8 *ie = NULL, *bssid;
6594         int ie_len = 0, err;
6595         u16 reason_code;
6596         bool local_state_change;
6597
6598         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6599                 return -EINVAL;
6600
6601         if (!info->attrs[NL80211_ATTR_MAC])
6602                 return -EINVAL;
6603
6604         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6605                 return -EINVAL;
6606
6607         if (!rdev->ops->deauth)
6608                 return -EOPNOTSUPP;
6609
6610         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6611             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6612                 return -EOPNOTSUPP;
6613
6614         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6615
6616         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6617         if (reason_code == 0) {
6618                 /* Reason Code 0 is reserved */
6619                 return -EINVAL;
6620         }
6621
6622         if (info->attrs[NL80211_ATTR_IE]) {
6623                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6624                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6625         }
6626
6627         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6628
6629         wdev_lock(dev->ieee80211_ptr);
6630         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6631                                    local_state_change);
6632         wdev_unlock(dev->ieee80211_ptr);
6633         return err;
6634 }
6635
6636 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6637 {
6638         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6639         struct net_device *dev = info->user_ptr[1];
6640         const u8 *ie = NULL, *bssid;
6641         int ie_len = 0, err;
6642         u16 reason_code;
6643         bool local_state_change;
6644
6645         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6646                 return -EINVAL;
6647
6648         if (!info->attrs[NL80211_ATTR_MAC])
6649                 return -EINVAL;
6650
6651         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6652                 return -EINVAL;
6653
6654         if (!rdev->ops->disassoc)
6655                 return -EOPNOTSUPP;
6656
6657         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6658             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6659                 return -EOPNOTSUPP;
6660
6661         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6662
6663         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6664         if (reason_code == 0) {
6665                 /* Reason Code 0 is reserved */
6666                 return -EINVAL;
6667         }
6668
6669         if (info->attrs[NL80211_ATTR_IE]) {
6670                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6671                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6672         }
6673
6674         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6675
6676         wdev_lock(dev->ieee80211_ptr);
6677         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6678                                      local_state_change);
6679         wdev_unlock(dev->ieee80211_ptr);
6680         return err;
6681 }
6682
6683 static bool
6684 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6685                          int mcast_rate[IEEE80211_NUM_BANDS],
6686                          int rateval)
6687 {
6688         struct wiphy *wiphy = &rdev->wiphy;
6689         bool found = false;
6690         int band, i;
6691
6692         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6693                 struct ieee80211_supported_band *sband;
6694
6695                 sband = wiphy->bands[band];
6696                 if (!sband)
6697                         continue;
6698
6699                 for (i = 0; i < sband->n_bitrates; i++) {
6700                         if (sband->bitrates[i].bitrate == rateval) {
6701                                 mcast_rate[band] = i + 1;
6702                                 found = true;
6703                                 break;
6704                         }
6705                 }
6706         }
6707
6708         return found;
6709 }
6710
6711 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6712 {
6713         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6714         struct net_device *dev = info->user_ptr[1];
6715         struct cfg80211_ibss_params ibss;
6716         struct wiphy *wiphy;
6717         struct cfg80211_cached_keys *connkeys = NULL;
6718         int err;
6719
6720         memset(&ibss, 0, sizeof(ibss));
6721
6722         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6723                 return -EINVAL;
6724
6725         if (!info->attrs[NL80211_ATTR_SSID] ||
6726             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6727                 return -EINVAL;
6728
6729         ibss.beacon_interval = 100;
6730
6731         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6732                 ibss.beacon_interval =
6733                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6734                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6735                         return -EINVAL;
6736         }
6737
6738         if (!rdev->ops->join_ibss)
6739                 return -EOPNOTSUPP;
6740
6741         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6742                 return -EOPNOTSUPP;
6743
6744         wiphy = &rdev->wiphy;
6745
6746         if (info->attrs[NL80211_ATTR_MAC]) {
6747                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6748
6749                 if (!is_valid_ether_addr(ibss.bssid))
6750                         return -EINVAL;
6751         }
6752         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6753         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6754
6755         if (info->attrs[NL80211_ATTR_IE]) {
6756                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6757                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6758         }
6759
6760         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6761         if (err)
6762                 return err;
6763
6764         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
6765                                      NL80211_IFTYPE_ADHOC))
6766                 return -EINVAL;
6767
6768         switch (ibss.chandef.width) {
6769         case NL80211_CHAN_WIDTH_5:
6770         case NL80211_CHAN_WIDTH_10:
6771         case NL80211_CHAN_WIDTH_20_NOHT:
6772                 break;
6773         case NL80211_CHAN_WIDTH_20:
6774         case NL80211_CHAN_WIDTH_40:
6775                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6776                         break;
6777         default:
6778                 return -EINVAL;
6779         }
6780
6781         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6782         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6783
6784         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6785                 u8 *rates =
6786                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6787                 int n_rates =
6788                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6789                 struct ieee80211_supported_band *sband =
6790                         wiphy->bands[ibss.chandef.chan->band];
6791
6792                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6793                                              &ibss.basic_rates);
6794                 if (err)
6795                         return err;
6796         }
6797
6798         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6799                 memcpy(&ibss.ht_capa_mask,
6800                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6801                        sizeof(ibss.ht_capa_mask));
6802
6803         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6804                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6805                         return -EINVAL;
6806                 memcpy(&ibss.ht_capa,
6807                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6808                        sizeof(ibss.ht_capa));
6809         }
6810
6811         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6812             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6813                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6814                 return -EINVAL;
6815
6816         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6817                 bool no_ht = false;
6818
6819                 connkeys = nl80211_parse_connkeys(rdev,
6820                                           info->attrs[NL80211_ATTR_KEYS],
6821                                           &no_ht);
6822                 if (IS_ERR(connkeys))
6823                         return PTR_ERR(connkeys);
6824
6825                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6826                     no_ht) {
6827                         kfree(connkeys);
6828                         return -EINVAL;
6829                 }
6830         }
6831
6832         ibss.control_port =
6833                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6834
6835         ibss.userspace_handles_dfs =
6836                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6837
6838         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6839         if (err)
6840                 kfree(connkeys);
6841         return err;
6842 }
6843
6844 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6845 {
6846         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6847         struct net_device *dev = info->user_ptr[1];
6848
6849         if (!rdev->ops->leave_ibss)
6850                 return -EOPNOTSUPP;
6851
6852         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6853                 return -EOPNOTSUPP;
6854
6855         return cfg80211_leave_ibss(rdev, dev, false);
6856 }
6857
6858 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6859 {
6860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6861         struct net_device *dev = info->user_ptr[1];
6862         int mcast_rate[IEEE80211_NUM_BANDS];
6863         u32 nla_rate;
6864         int err;
6865
6866         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6867             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6868                 return -EOPNOTSUPP;
6869
6870         if (!rdev->ops->set_mcast_rate)
6871                 return -EOPNOTSUPP;
6872
6873         memset(mcast_rate, 0, sizeof(mcast_rate));
6874
6875         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6876                 return -EINVAL;
6877
6878         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6879         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6880                 return -EINVAL;
6881
6882         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6883
6884         return err;
6885 }
6886
6887 static struct sk_buff *
6888 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
6889                             int approxlen, u32 portid, u32 seq,
6890                             enum nl80211_commands cmd,
6891                             enum nl80211_attrs attr,
6892                             const struct nl80211_vendor_cmd_info *info,
6893                             gfp_t gfp)
6894 {
6895         struct sk_buff *skb;
6896         void *hdr;
6897         struct nlattr *data;
6898
6899         skb = nlmsg_new(approxlen + 100, gfp);
6900         if (!skb)
6901                 return NULL;
6902
6903         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
6904         if (!hdr) {
6905                 kfree_skb(skb);
6906                 return NULL;
6907         }
6908
6909         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6910                 goto nla_put_failure;
6911
6912         if (info) {
6913                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
6914                                 info->vendor_id))
6915                         goto nla_put_failure;
6916                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
6917                                 info->subcmd))
6918                         goto nla_put_failure;
6919         }
6920
6921         data = nla_nest_start(skb, attr);
6922
6923         ((void **)skb->cb)[0] = rdev;
6924         ((void **)skb->cb)[1] = hdr;
6925         ((void **)skb->cb)[2] = data;
6926
6927         return skb;
6928
6929  nla_put_failure:
6930         kfree_skb(skb);
6931         return NULL;
6932 }
6933
6934 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
6935                                            enum nl80211_commands cmd,
6936                                            enum nl80211_attrs attr,
6937                                            int vendor_event_idx,
6938                                            int approxlen, gfp_t gfp)
6939 {
6940         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
6941         const struct nl80211_vendor_cmd_info *info;
6942
6943         switch (cmd) {
6944         case NL80211_CMD_TESTMODE:
6945                 if (WARN_ON(vendor_event_idx != -1))
6946                         return NULL;
6947                 info = NULL;
6948                 break;
6949         case NL80211_CMD_VENDOR:
6950                 if (WARN_ON(vendor_event_idx < 0 ||
6951                             vendor_event_idx >= wiphy->n_vendor_events))
6952                         return NULL;
6953                 info = &wiphy->vendor_events[vendor_event_idx];
6954                 break;
6955         default:
6956                 WARN_ON(1);
6957                 return NULL;
6958         }
6959
6960         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
6961                                            cmd, attr, info, gfp);
6962 }
6963 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
6964
6965 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
6966 {
6967         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6968         void *hdr = ((void **)skb->cb)[1];
6969         struct nlattr *data = ((void **)skb->cb)[2];
6970         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
6971
6972         nla_nest_end(skb, data);
6973         genlmsg_end(skb, hdr);
6974
6975         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
6976                 mcgrp = NL80211_MCGRP_VENDOR;
6977
6978         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
6979                                 mcgrp, gfp);
6980 }
6981 EXPORT_SYMBOL(__cfg80211_send_event_skb);
6982
6983 #ifdef CONFIG_NL80211_TESTMODE
6984 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6985 {
6986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6987         struct wireless_dev *wdev =
6988                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6989         int err;
6990
6991         if (!rdev->ops->testmode_cmd)
6992                 return -EOPNOTSUPP;
6993
6994         if (IS_ERR(wdev)) {
6995                 err = PTR_ERR(wdev);
6996                 if (err != -EINVAL)
6997                         return err;
6998                 wdev = NULL;
6999         } else if (wdev->wiphy != &rdev->wiphy) {
7000                 return -EINVAL;
7001         }
7002
7003         if (!info->attrs[NL80211_ATTR_TESTDATA])
7004                 return -EINVAL;
7005
7006         rdev->cur_cmd_info = info;
7007         err = rdev_testmode_cmd(rdev, wdev,
7008                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7009                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7010         rdev->cur_cmd_info = NULL;
7011
7012         return err;
7013 }
7014
7015 static int nl80211_testmode_dump(struct sk_buff *skb,
7016                                  struct netlink_callback *cb)
7017 {
7018         struct cfg80211_registered_device *rdev;
7019         int err;
7020         long phy_idx;
7021         void *data = NULL;
7022         int data_len = 0;
7023
7024         rtnl_lock();
7025
7026         if (cb->args[0]) {
7027                 /*
7028                  * 0 is a valid index, but not valid for args[0],
7029                  * so we need to offset by 1.
7030                  */
7031                 phy_idx = cb->args[0] - 1;
7032         } else {
7033                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7034                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7035                                   nl80211_policy);
7036                 if (err)
7037                         goto out_err;
7038
7039                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7040                                                   nl80211_fam.attrbuf);
7041                 if (IS_ERR(rdev)) {
7042                         err = PTR_ERR(rdev);
7043                         goto out_err;
7044                 }
7045                 phy_idx = rdev->wiphy_idx;
7046                 rdev = NULL;
7047
7048                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7049                         cb->args[1] =
7050                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7051         }
7052
7053         if (cb->args[1]) {
7054                 data = nla_data((void *)cb->args[1]);
7055                 data_len = nla_len((void *)cb->args[1]);
7056         }
7057
7058         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7059         if (!rdev) {
7060                 err = -ENOENT;
7061                 goto out_err;
7062         }
7063
7064         if (!rdev->ops->testmode_dump) {
7065                 err = -EOPNOTSUPP;
7066                 goto out_err;
7067         }
7068
7069         while (1) {
7070                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7071                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7072                                            NL80211_CMD_TESTMODE);
7073                 struct nlattr *tmdata;
7074
7075                 if (!hdr)
7076                         break;
7077
7078                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7079                         genlmsg_cancel(skb, hdr);
7080                         break;
7081                 }
7082
7083                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7084                 if (!tmdata) {
7085                         genlmsg_cancel(skb, hdr);
7086                         break;
7087                 }
7088                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7089                 nla_nest_end(skb, tmdata);
7090
7091                 if (err == -ENOBUFS || err == -ENOENT) {
7092                         genlmsg_cancel(skb, hdr);
7093                         break;
7094                 } else if (err) {
7095                         genlmsg_cancel(skb, hdr);
7096                         goto out_err;
7097                 }
7098
7099                 genlmsg_end(skb, hdr);
7100         }
7101
7102         err = skb->len;
7103         /* see above */
7104         cb->args[0] = phy_idx + 1;
7105  out_err:
7106         rtnl_unlock();
7107         return err;
7108 }
7109 #endif
7110
7111 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7112 {
7113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7114         struct net_device *dev = info->user_ptr[1];
7115         struct cfg80211_connect_params connect;
7116         struct wiphy *wiphy;
7117         struct cfg80211_cached_keys *connkeys = NULL;
7118         int err;
7119
7120         memset(&connect, 0, sizeof(connect));
7121
7122         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7123                 return -EINVAL;
7124
7125         if (!info->attrs[NL80211_ATTR_SSID] ||
7126             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7127                 return -EINVAL;
7128
7129         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7130                 connect.auth_type =
7131                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7132                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7133                                              NL80211_CMD_CONNECT))
7134                         return -EINVAL;
7135         } else
7136                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7137
7138         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7139
7140         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7141                                       NL80211_MAX_NR_CIPHER_SUITES);
7142         if (err)
7143                 return err;
7144
7145         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7146             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7147                 return -EOPNOTSUPP;
7148
7149         wiphy = &rdev->wiphy;
7150
7151         connect.bg_scan_period = -1;
7152         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7153                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7154                 connect.bg_scan_period =
7155                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7156         }
7157
7158         if (info->attrs[NL80211_ATTR_MAC])
7159                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7160         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7161                 connect.bssid_hint =
7162                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7163         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7164         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7165
7166         if (info->attrs[NL80211_ATTR_IE]) {
7167                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7168                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7169         }
7170
7171         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7172                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7173                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7174                     connect.mfp != NL80211_MFP_NO)
7175                         return -EINVAL;
7176         } else {
7177                 connect.mfp = NL80211_MFP_NO;
7178         }
7179
7180         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7181                 connect.channel = nl80211_get_valid_chan(
7182                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7183                 if (!connect.channel)
7184                         return -EINVAL;
7185         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7186                 connect.channel_hint = nl80211_get_valid_chan(
7187                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7188                 if (!connect.channel_hint)
7189                         return -EINVAL;
7190         }
7191
7192         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7193                 connkeys = nl80211_parse_connkeys(rdev,
7194                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7195                 if (IS_ERR(connkeys))
7196                         return PTR_ERR(connkeys);
7197         }
7198
7199         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7200                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7201
7202         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7203                 memcpy(&connect.ht_capa_mask,
7204                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7205                        sizeof(connect.ht_capa_mask));
7206
7207         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7208                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7209                         kfree(connkeys);
7210                         return -EINVAL;
7211                 }
7212                 memcpy(&connect.ht_capa,
7213                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7214                        sizeof(connect.ht_capa));
7215         }
7216
7217         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7218                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7219
7220         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7221                 memcpy(&connect.vht_capa_mask,
7222                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7223                        sizeof(connect.vht_capa_mask));
7224
7225         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7226                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7227                         kfree(connkeys);
7228                         return -EINVAL;
7229                 }
7230                 memcpy(&connect.vht_capa,
7231                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7232                        sizeof(connect.vht_capa));
7233         }
7234
7235         wdev_lock(dev->ieee80211_ptr);
7236         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7237         wdev_unlock(dev->ieee80211_ptr);
7238         if (err)
7239                 kfree(connkeys);
7240         return err;
7241 }
7242
7243 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7244 {
7245         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7246         struct net_device *dev = info->user_ptr[1];
7247         u16 reason;
7248         int ret;
7249
7250         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7251                 reason = WLAN_REASON_DEAUTH_LEAVING;
7252         else
7253                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7254
7255         if (reason == 0)
7256                 return -EINVAL;
7257
7258         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7259             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7260                 return -EOPNOTSUPP;
7261
7262         wdev_lock(dev->ieee80211_ptr);
7263         ret = cfg80211_disconnect(rdev, dev, reason, true);
7264         wdev_unlock(dev->ieee80211_ptr);
7265         return ret;
7266 }
7267
7268 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7269 {
7270         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7271         struct net *net;
7272         int err;
7273         u32 pid;
7274
7275         if (!info->attrs[NL80211_ATTR_PID])
7276                 return -EINVAL;
7277
7278         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7279
7280         net = get_net_ns_by_pid(pid);
7281         if (IS_ERR(net))
7282                 return PTR_ERR(net);
7283
7284         err = 0;
7285
7286         /* check if anything to do */
7287         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7288                 err = cfg80211_switch_netns(rdev, net);
7289
7290         put_net(net);
7291         return err;
7292 }
7293
7294 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7295 {
7296         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7297         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7298                         struct cfg80211_pmksa *pmksa) = NULL;
7299         struct net_device *dev = info->user_ptr[1];
7300         struct cfg80211_pmksa pmksa;
7301
7302         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7303
7304         if (!info->attrs[NL80211_ATTR_MAC])
7305                 return -EINVAL;
7306
7307         if (!info->attrs[NL80211_ATTR_PMKID])
7308                 return -EINVAL;
7309
7310         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7311         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7312
7313         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7314             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7315                 return -EOPNOTSUPP;
7316
7317         switch (info->genlhdr->cmd) {
7318         case NL80211_CMD_SET_PMKSA:
7319                 rdev_ops = rdev->ops->set_pmksa;
7320                 break;
7321         case NL80211_CMD_DEL_PMKSA:
7322                 rdev_ops = rdev->ops->del_pmksa;
7323                 break;
7324         default:
7325                 WARN_ON(1);
7326                 break;
7327         }
7328
7329         if (!rdev_ops)
7330                 return -EOPNOTSUPP;
7331
7332         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7333 }
7334
7335 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7336 {
7337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7338         struct net_device *dev = info->user_ptr[1];
7339
7340         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7341             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7342                 return -EOPNOTSUPP;
7343
7344         if (!rdev->ops->flush_pmksa)
7345                 return -EOPNOTSUPP;
7346
7347         return rdev_flush_pmksa(rdev, dev);
7348 }
7349
7350 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7351 {
7352         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7353         struct net_device *dev = info->user_ptr[1];
7354         u8 action_code, dialog_token;
7355         u32 peer_capability = 0;
7356         u16 status_code;
7357         u8 *peer;
7358         bool initiator;
7359
7360         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7361             !rdev->ops->tdls_mgmt)
7362                 return -EOPNOTSUPP;
7363
7364         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7365             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7366             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7367             !info->attrs[NL80211_ATTR_IE] ||
7368             !info->attrs[NL80211_ATTR_MAC])
7369                 return -EINVAL;
7370
7371         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7372         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7373         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7374         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7375         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
7376         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
7377                 peer_capability =
7378                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
7379
7380         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7381                               dialog_token, status_code, peer_capability,
7382                               initiator,
7383                               nla_data(info->attrs[NL80211_ATTR_IE]),
7384                               nla_len(info->attrs[NL80211_ATTR_IE]));
7385 }
7386
7387 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7388 {
7389         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7390         struct net_device *dev = info->user_ptr[1];
7391         enum nl80211_tdls_operation operation;
7392         u8 *peer;
7393
7394         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7395             !rdev->ops->tdls_oper)
7396                 return -EOPNOTSUPP;
7397
7398         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7399             !info->attrs[NL80211_ATTR_MAC])
7400                 return -EINVAL;
7401
7402         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7403         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7404
7405         return rdev_tdls_oper(rdev, dev, peer, operation);
7406 }
7407
7408 static int nl80211_remain_on_channel(struct sk_buff *skb,
7409                                      struct genl_info *info)
7410 {
7411         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7412         struct wireless_dev *wdev = info->user_ptr[1];
7413         struct cfg80211_chan_def chandef;
7414         struct sk_buff *msg;
7415         void *hdr;
7416         u64 cookie;
7417         u32 duration;
7418         int err;
7419
7420         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7421             !info->attrs[NL80211_ATTR_DURATION])
7422                 return -EINVAL;
7423
7424         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7425
7426         if (!rdev->ops->remain_on_channel ||
7427             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7428                 return -EOPNOTSUPP;
7429
7430         /*
7431          * We should be on that channel for at least a minimum amount of
7432          * time (10ms) but no longer than the driver supports.
7433          */
7434         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7435             duration > rdev->wiphy.max_remain_on_channel_duration)
7436                 return -EINVAL;
7437
7438         err = nl80211_parse_chandef(rdev, info, &chandef);
7439         if (err)
7440                 return err;
7441
7442         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7443         if (!msg)
7444                 return -ENOMEM;
7445
7446         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7447                              NL80211_CMD_REMAIN_ON_CHANNEL);
7448         if (!hdr) {
7449                 err = -ENOBUFS;
7450                 goto free_msg;
7451         }
7452
7453         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7454                                      duration, &cookie);
7455
7456         if (err)
7457                 goto free_msg;
7458
7459         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7460                 goto nla_put_failure;
7461
7462         genlmsg_end(msg, hdr);
7463
7464         return genlmsg_reply(msg, info);
7465
7466  nla_put_failure:
7467         err = -ENOBUFS;
7468  free_msg:
7469         nlmsg_free(msg);
7470         return err;
7471 }
7472
7473 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7474                                             struct genl_info *info)
7475 {
7476         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7477         struct wireless_dev *wdev = info->user_ptr[1];
7478         u64 cookie;
7479
7480         if (!info->attrs[NL80211_ATTR_COOKIE])
7481                 return -EINVAL;
7482
7483         if (!rdev->ops->cancel_remain_on_channel)
7484                 return -EOPNOTSUPP;
7485
7486         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7487
7488         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7489 }
7490
7491 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7492                            u8 *rates, u8 rates_len)
7493 {
7494         u8 i;
7495         u32 mask = 0;
7496
7497         for (i = 0; i < rates_len; i++) {
7498                 int rate = (rates[i] & 0x7f) * 5;
7499                 int ridx;
7500                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7501                         struct ieee80211_rate *srate =
7502                                 &sband->bitrates[ridx];
7503                         if (rate == srate->bitrate) {
7504                                 mask |= 1 << ridx;
7505                                 break;
7506                         }
7507                 }
7508                 if (ridx == sband->n_bitrates)
7509                         return 0; /* rate not found */
7510         }
7511
7512         return mask;
7513 }
7514
7515 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7516                                u8 *rates, u8 rates_len,
7517                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7518 {
7519         u8 i;
7520
7521         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7522
7523         for (i = 0; i < rates_len; i++) {
7524                 int ridx, rbit;
7525
7526                 ridx = rates[i] / 8;
7527                 rbit = BIT(rates[i] % 8);
7528
7529                 /* check validity */
7530                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7531                         return false;
7532
7533                 /* check availability */
7534                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7535                         mcs[ridx] |= rbit;
7536                 else
7537                         return false;
7538         }
7539
7540         return true;
7541 }
7542
7543 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
7544 {
7545         u16 mcs_mask = 0;
7546
7547         switch (vht_mcs_map) {
7548         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
7549                 break;
7550         case IEEE80211_VHT_MCS_SUPPORT_0_7:
7551                 mcs_mask = 0x00FF;
7552                 break;
7553         case IEEE80211_VHT_MCS_SUPPORT_0_8:
7554                 mcs_mask = 0x01FF;
7555                 break;
7556         case IEEE80211_VHT_MCS_SUPPORT_0_9:
7557                 mcs_mask = 0x03FF;
7558                 break;
7559         default:
7560                 break;
7561         }
7562
7563         return mcs_mask;
7564 }
7565
7566 static void vht_build_mcs_mask(u16 vht_mcs_map,
7567                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
7568 {
7569         u8 nss;
7570
7571         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
7572                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
7573                 vht_mcs_map >>= 2;
7574         }
7575 }
7576
7577 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
7578                              struct nl80211_txrate_vht *txrate,
7579                              u16 mcs[NL80211_VHT_NSS_MAX])
7580 {
7581         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7582         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
7583         u8 i;
7584
7585         if (!sband->vht_cap.vht_supported)
7586                 return false;
7587
7588         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
7589
7590         /* Build vht_mcs_mask from VHT capabilities */
7591         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
7592
7593         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
7594                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
7595                         mcs[i] = txrate->mcs[i];
7596                 else
7597                         return false;
7598         }
7599
7600         return true;
7601 }
7602
7603 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7604         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7605                                     .len = NL80211_MAX_SUPP_RATES },
7606         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7607                                 .len = NL80211_MAX_SUPP_HT_RATES },
7608         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
7609         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
7610 };
7611
7612 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7613                                        struct genl_info *info)
7614 {
7615         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7616         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7617         struct cfg80211_bitrate_mask mask;
7618         int rem, i;
7619         struct net_device *dev = info->user_ptr[1];
7620         struct nlattr *tx_rates;
7621         struct ieee80211_supported_band *sband;
7622         u16 vht_tx_mcs_map;
7623
7624         if (!rdev->ops->set_bitrate_mask)
7625                 return -EOPNOTSUPP;
7626
7627         memset(&mask, 0, sizeof(mask));
7628         /* Default to all rates enabled */
7629         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7630                 sband = rdev->wiphy.bands[i];
7631
7632                 if (!sband)
7633                         continue;
7634
7635                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7636                 memcpy(mask.control[i].ht_mcs,
7637                        sband->ht_cap.mcs.rx_mask,
7638                        sizeof(mask.control[i].ht_mcs));
7639
7640                 if (!sband->vht_cap.vht_supported)
7641                         continue;
7642
7643                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7644                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
7645         }
7646
7647         /* if no rates are given set it back to the defaults */
7648         if (!info->attrs[NL80211_ATTR_TX_RATES])
7649                 goto out;
7650
7651         /*
7652          * The nested attribute uses enum nl80211_band as the index. This maps
7653          * directly to the enum ieee80211_band values used in cfg80211.
7654          */
7655         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7656         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
7657                 enum ieee80211_band band = nla_type(tx_rates);
7658                 int err;
7659
7660                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7661                         return -EINVAL;
7662                 sband = rdev->wiphy.bands[band];
7663                 if (sband == NULL)
7664                         return -EINVAL;
7665                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7666                                 nla_len(tx_rates), nl80211_txattr_policy);
7667                 if (err)
7668                         return err;
7669                 if (tb[NL80211_TXRATE_LEGACY]) {
7670                         mask.control[band].legacy = rateset_to_mask(
7671                                 sband,
7672                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7673                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7674                         if ((mask.control[band].legacy == 0) &&
7675                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7676                                 return -EINVAL;
7677                 }
7678                 if (tb[NL80211_TXRATE_HT]) {
7679                         if (!ht_rateset_to_mask(
7680                                         sband,
7681                                         nla_data(tb[NL80211_TXRATE_HT]),
7682                                         nla_len(tb[NL80211_TXRATE_HT]),
7683                                         mask.control[band].ht_mcs))
7684                                 return -EINVAL;
7685                 }
7686                 if (tb[NL80211_TXRATE_VHT]) {
7687                         if (!vht_set_mcs_mask(
7688                                         sband,
7689                                         nla_data(tb[NL80211_TXRATE_VHT]),
7690                                         mask.control[band].vht_mcs))
7691                                 return -EINVAL;
7692                 }
7693                 if (tb[NL80211_TXRATE_GI]) {
7694                         mask.control[band].gi =
7695                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
7696                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
7697                                 return -EINVAL;
7698                 }
7699
7700                 if (mask.control[band].legacy == 0) {
7701                         /* don't allow empty legacy rates if HT or VHT
7702                          * are not even supported.
7703                          */
7704                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
7705                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
7706                                 return -EINVAL;
7707
7708                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7709                                 if (mask.control[band].ht_mcs[i])
7710                                         goto out;
7711
7712                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
7713                                 if (mask.control[band].vht_mcs[i])
7714                                         goto out;
7715
7716                         /* legacy and mcs rates may not be both empty */
7717                         return -EINVAL;
7718                 }
7719         }
7720
7721 out:
7722         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7723 }
7724
7725 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7726 {
7727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7728         struct wireless_dev *wdev = info->user_ptr[1];
7729         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7730
7731         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7732                 return -EINVAL;
7733
7734         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7735                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7736
7737         switch (wdev->iftype) {
7738         case NL80211_IFTYPE_STATION:
7739         case NL80211_IFTYPE_ADHOC:
7740         case NL80211_IFTYPE_P2P_CLIENT:
7741         case NL80211_IFTYPE_AP:
7742         case NL80211_IFTYPE_AP_VLAN:
7743         case NL80211_IFTYPE_MESH_POINT:
7744         case NL80211_IFTYPE_P2P_GO:
7745         case NL80211_IFTYPE_P2P_DEVICE:
7746                 break;
7747         default:
7748                 return -EOPNOTSUPP;
7749         }
7750
7751         /* not much point in registering if we can't reply */
7752         if (!rdev->ops->mgmt_tx)
7753                 return -EOPNOTSUPP;
7754
7755         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7756                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7757                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7758 }
7759
7760 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7761 {
7762         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7763         struct wireless_dev *wdev = info->user_ptr[1];
7764         struct cfg80211_chan_def chandef;
7765         int err;
7766         void *hdr = NULL;
7767         u64 cookie;
7768         struct sk_buff *msg = NULL;
7769         struct cfg80211_mgmt_tx_params params = {
7770                 .dont_wait_for_ack =
7771                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
7772         };
7773
7774         if (!info->attrs[NL80211_ATTR_FRAME])
7775                 return -EINVAL;
7776
7777         if (!rdev->ops->mgmt_tx)
7778                 return -EOPNOTSUPP;
7779
7780         switch (wdev->iftype) {
7781         case NL80211_IFTYPE_P2P_DEVICE:
7782                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7783                         return -EINVAL;
7784         case NL80211_IFTYPE_STATION:
7785         case NL80211_IFTYPE_ADHOC:
7786         case NL80211_IFTYPE_P2P_CLIENT:
7787         case NL80211_IFTYPE_AP:
7788         case NL80211_IFTYPE_AP_VLAN:
7789         case NL80211_IFTYPE_MESH_POINT:
7790         case NL80211_IFTYPE_P2P_GO:
7791                 break;
7792         default:
7793                 return -EOPNOTSUPP;
7794         }
7795
7796         if (info->attrs[NL80211_ATTR_DURATION]) {
7797                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7798                         return -EINVAL;
7799                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7800
7801                 /*
7802                  * We should wait on the channel for at least a minimum amount
7803                  * of time (10ms) but no longer than the driver supports.
7804                  */
7805                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7806                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
7807                         return -EINVAL;
7808
7809         }
7810
7811         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7812
7813         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7814                 return -EINVAL;
7815
7816         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7817
7818         /* get the channel if any has been specified, otherwise pass NULL to
7819          * the driver. The latter will use the current one
7820          */
7821         chandef.chan = NULL;
7822         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7823                 err = nl80211_parse_chandef(rdev, info, &chandef);
7824                 if (err)
7825                         return err;
7826         }
7827
7828         if (!chandef.chan && params.offchan)
7829                 return -EINVAL;
7830
7831         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
7832         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
7833
7834         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
7835                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
7836                 int i;
7837
7838                 if (len % sizeof(u16))
7839                         return -EINVAL;
7840
7841                 params.n_csa_offsets = len / sizeof(u16);
7842                 params.csa_offsets =
7843                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
7844
7845                 /* check that all the offsets fit the frame */
7846                 for (i = 0; i < params.n_csa_offsets; i++) {
7847                         if (params.csa_offsets[i] >= params.len)
7848                                 return -EINVAL;
7849                 }
7850         }
7851
7852         if (!params.dont_wait_for_ack) {
7853                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7854                 if (!msg)
7855                         return -ENOMEM;
7856
7857                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7858                                      NL80211_CMD_FRAME);
7859                 if (!hdr) {
7860                         err = -ENOBUFS;
7861                         goto free_msg;
7862                 }
7863         }
7864
7865         params.chan = chandef.chan;
7866         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
7867         if (err)
7868                 goto free_msg;
7869
7870         if (msg) {
7871                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7872                         goto nla_put_failure;
7873
7874                 genlmsg_end(msg, hdr);
7875                 return genlmsg_reply(msg, info);
7876         }
7877
7878         return 0;
7879
7880  nla_put_failure:
7881         err = -ENOBUFS;
7882  free_msg:
7883         nlmsg_free(msg);
7884         return err;
7885 }
7886
7887 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7888 {
7889         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7890         struct wireless_dev *wdev = info->user_ptr[1];
7891         u64 cookie;
7892
7893         if (!info->attrs[NL80211_ATTR_COOKIE])
7894                 return -EINVAL;
7895
7896         if (!rdev->ops->mgmt_tx_cancel_wait)
7897                 return -EOPNOTSUPP;
7898
7899         switch (wdev->iftype) {
7900         case NL80211_IFTYPE_STATION:
7901         case NL80211_IFTYPE_ADHOC:
7902         case NL80211_IFTYPE_P2P_CLIENT:
7903         case NL80211_IFTYPE_AP:
7904         case NL80211_IFTYPE_AP_VLAN:
7905         case NL80211_IFTYPE_P2P_GO:
7906         case NL80211_IFTYPE_P2P_DEVICE:
7907                 break;
7908         default:
7909                 return -EOPNOTSUPP;
7910         }
7911
7912         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7913
7914         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7915 }
7916
7917 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7918 {
7919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7920         struct wireless_dev *wdev;
7921         struct net_device *dev = info->user_ptr[1];
7922         u8 ps_state;
7923         bool state;
7924         int err;
7925
7926         if (!info->attrs[NL80211_ATTR_PS_STATE])
7927                 return -EINVAL;
7928
7929         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7930
7931         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7932                 return -EINVAL;
7933
7934         wdev = dev->ieee80211_ptr;
7935
7936         if (!rdev->ops->set_power_mgmt)
7937                 return -EOPNOTSUPP;
7938
7939         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7940
7941         if (state == wdev->ps)
7942                 return 0;
7943
7944         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7945         if (!err)
7946                 wdev->ps = state;
7947         return err;
7948 }
7949
7950 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7951 {
7952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7953         enum nl80211_ps_state ps_state;
7954         struct wireless_dev *wdev;
7955         struct net_device *dev = info->user_ptr[1];
7956         struct sk_buff *msg;
7957         void *hdr;
7958         int err;
7959
7960         wdev = dev->ieee80211_ptr;
7961
7962         if (!rdev->ops->set_power_mgmt)
7963                 return -EOPNOTSUPP;
7964
7965         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7966         if (!msg)
7967                 return -ENOMEM;
7968
7969         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7970                              NL80211_CMD_GET_POWER_SAVE);
7971         if (!hdr) {
7972                 err = -ENOBUFS;
7973                 goto free_msg;
7974         }
7975
7976         if (wdev->ps)
7977                 ps_state = NL80211_PS_ENABLED;
7978         else
7979                 ps_state = NL80211_PS_DISABLED;
7980
7981         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7982                 goto nla_put_failure;
7983
7984         genlmsg_end(msg, hdr);
7985         return genlmsg_reply(msg, info);
7986
7987  nla_put_failure:
7988         err = -ENOBUFS;
7989  free_msg:
7990         nlmsg_free(msg);
7991         return err;
7992 }
7993
7994 static const struct nla_policy
7995 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
7996         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7997         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7998         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7999         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8000         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8001         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8002 };
8003
8004 static int nl80211_set_cqm_txe(struct genl_info *info,
8005                                u32 rate, u32 pkts, u32 intvl)
8006 {
8007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8008         struct net_device *dev = info->user_ptr[1];
8009         struct wireless_dev *wdev = dev->ieee80211_ptr;
8010
8011         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8012                 return -EINVAL;
8013
8014         if (!rdev->ops->set_cqm_txe_config)
8015                 return -EOPNOTSUPP;
8016
8017         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8018             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8019                 return -EOPNOTSUPP;
8020
8021         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8022 }
8023
8024 static int nl80211_set_cqm_rssi(struct genl_info *info,
8025                                 s32 threshold, u32 hysteresis)
8026 {
8027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8028         struct net_device *dev = info->user_ptr[1];
8029         struct wireless_dev *wdev = dev->ieee80211_ptr;
8030
8031         if (threshold > 0)
8032                 return -EINVAL;
8033
8034         /* disabling - hysteresis should also be zero then */
8035         if (threshold == 0)
8036                 hysteresis = 0;
8037
8038         if (!rdev->ops->set_cqm_rssi_config)
8039                 return -EOPNOTSUPP;
8040
8041         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8042             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8043                 return -EOPNOTSUPP;
8044
8045         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8046 }
8047
8048 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8049 {
8050         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8051         struct nlattr *cqm;
8052         int err;
8053
8054         cqm = info->attrs[NL80211_ATTR_CQM];
8055         if (!cqm)
8056                 return -EINVAL;
8057
8058         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8059                                nl80211_attr_cqm_policy);
8060         if (err)
8061                 return err;
8062
8063         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8064             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8065                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8066                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8067
8068                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8069         }
8070
8071         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8072             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8073             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8074                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8075                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8076                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8077
8078                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8079         }
8080
8081         return -EINVAL;
8082 }
8083
8084 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8085 {
8086         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8087         struct net_device *dev = info->user_ptr[1];
8088         struct mesh_config cfg;
8089         struct mesh_setup setup;
8090         int err;
8091
8092         /* start with default */
8093         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8094         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8095
8096         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8097                 /* and parse parameters if given */
8098                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8099                 if (err)
8100                         return err;
8101         }
8102
8103         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8104             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8105                 return -EINVAL;
8106
8107         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8108         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8109
8110         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8111             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8112                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8113                         return -EINVAL;
8114
8115         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8116                 setup.beacon_interval =
8117                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8118                 if (setup.beacon_interval < 10 ||
8119                     setup.beacon_interval > 10000)
8120                         return -EINVAL;
8121         }
8122
8123         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8124                 setup.dtim_period =
8125                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8126                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8127                         return -EINVAL;
8128         }
8129
8130         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8131                 /* parse additional setup parameters if given */
8132                 err = nl80211_parse_mesh_setup(info, &setup);
8133                 if (err)
8134                         return err;
8135         }
8136
8137         if (setup.user_mpm)
8138                 cfg.auto_open_plinks = false;
8139
8140         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8141                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8142                 if (err)
8143                         return err;
8144         } else {
8145                 /* cfg80211_join_mesh() will sort it out */
8146                 setup.chandef.chan = NULL;
8147         }
8148
8149         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8150                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8151                 int n_rates =
8152                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8153                 struct ieee80211_supported_band *sband;
8154
8155                 if (!setup.chandef.chan)
8156                         return -EINVAL;
8157
8158                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8159
8160                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8161                                              &setup.basic_rates);
8162                 if (err)
8163                         return err;
8164         }
8165
8166         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8167 }
8168
8169 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8170 {
8171         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8172         struct net_device *dev = info->user_ptr[1];
8173
8174         return cfg80211_leave_mesh(rdev, dev);
8175 }
8176
8177 #ifdef CONFIG_PM
8178 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8179                                         struct cfg80211_registered_device *rdev)
8180 {
8181         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8182         struct nlattr *nl_pats, *nl_pat;
8183         int i, pat_len;
8184
8185         if (!wowlan->n_patterns)
8186                 return 0;
8187
8188         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8189         if (!nl_pats)
8190                 return -ENOBUFS;
8191
8192         for (i = 0; i < wowlan->n_patterns; i++) {
8193                 nl_pat = nla_nest_start(msg, i + 1);
8194                 if (!nl_pat)
8195                         return -ENOBUFS;
8196                 pat_len = wowlan->patterns[i].pattern_len;
8197                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8198                             wowlan->patterns[i].mask) ||
8199                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8200                             wowlan->patterns[i].pattern) ||
8201                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8202                                 wowlan->patterns[i].pkt_offset))
8203                         return -ENOBUFS;
8204                 nla_nest_end(msg, nl_pat);
8205         }
8206         nla_nest_end(msg, nl_pats);
8207
8208         return 0;
8209 }
8210
8211 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8212                                    struct cfg80211_wowlan_tcp *tcp)
8213 {
8214         struct nlattr *nl_tcp;
8215
8216         if (!tcp)
8217                 return 0;
8218
8219         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8220         if (!nl_tcp)
8221                 return -ENOBUFS;
8222
8223         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8224             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8225             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8226             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8227             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8228             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8229                     tcp->payload_len, tcp->payload) ||
8230             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8231                         tcp->data_interval) ||
8232             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8233                     tcp->wake_len, tcp->wake_data) ||
8234             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8235                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8236                 return -ENOBUFS;
8237
8238         if (tcp->payload_seq.len &&
8239             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8240                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8241                 return -ENOBUFS;
8242
8243         if (tcp->payload_tok.len &&
8244             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8245                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8246                     &tcp->payload_tok))
8247                 return -ENOBUFS;
8248
8249         nla_nest_end(msg, nl_tcp);
8250
8251         return 0;
8252 }
8253
8254 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8255 {
8256         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8257         struct sk_buff *msg;
8258         void *hdr;
8259         u32 size = NLMSG_DEFAULT_SIZE;
8260
8261         if (!rdev->wiphy.wowlan)
8262                 return -EOPNOTSUPP;
8263
8264         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8265                 /* adjust size to have room for all the data */
8266                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8267                         rdev->wiphy.wowlan_config->tcp->payload_len +
8268                         rdev->wiphy.wowlan_config->tcp->wake_len +
8269                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8270         }
8271
8272         msg = nlmsg_new(size, GFP_KERNEL);
8273         if (!msg)
8274                 return -ENOMEM;
8275
8276         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8277                              NL80211_CMD_GET_WOWLAN);
8278         if (!hdr)
8279                 goto nla_put_failure;
8280
8281         if (rdev->wiphy.wowlan_config) {
8282                 struct nlattr *nl_wowlan;
8283
8284                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8285                 if (!nl_wowlan)
8286                         goto nla_put_failure;
8287
8288                 if ((rdev->wiphy.wowlan_config->any &&
8289                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8290                     (rdev->wiphy.wowlan_config->disconnect &&
8291                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8292                     (rdev->wiphy.wowlan_config->magic_pkt &&
8293                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8294                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8295                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8296                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8297                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8298                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8299                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8300                     (rdev->wiphy.wowlan_config->rfkill_release &&
8301                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8302                         goto nla_put_failure;
8303
8304                 if (nl80211_send_wowlan_patterns(msg, rdev))
8305                         goto nla_put_failure;
8306
8307                 if (nl80211_send_wowlan_tcp(msg,
8308                                             rdev->wiphy.wowlan_config->tcp))
8309                         goto nla_put_failure;
8310
8311                 nla_nest_end(msg, nl_wowlan);
8312         }
8313
8314         genlmsg_end(msg, hdr);
8315         return genlmsg_reply(msg, info);
8316
8317 nla_put_failure:
8318         nlmsg_free(msg);
8319         return -ENOBUFS;
8320 }
8321
8322 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8323                                     struct nlattr *attr,
8324                                     struct cfg80211_wowlan *trig)
8325 {
8326         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8327         struct cfg80211_wowlan_tcp *cfg;
8328         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8329         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8330         u32 size;
8331         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8332         int err, port;
8333
8334         if (!rdev->wiphy.wowlan->tcp)
8335                 return -EINVAL;
8336
8337         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8338                         nla_data(attr), nla_len(attr),
8339                         nl80211_wowlan_tcp_policy);
8340         if (err)
8341                 return err;
8342
8343         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8344             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8345             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8346             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8347             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8348             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8349             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8350             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8351                 return -EINVAL;
8352
8353         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8354         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8355                 return -EINVAL;
8356
8357         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8358                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8359             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8360                 return -EINVAL;
8361
8362         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8363         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8364                 return -EINVAL;
8365
8366         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8367         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8368                 return -EINVAL;
8369
8370         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8371                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8372
8373                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8374                 tokens_size = tokln - sizeof(*tok);
8375
8376                 if (!tok->len || tokens_size % tok->len)
8377                         return -EINVAL;
8378                 if (!rdev->wiphy.wowlan->tcp->tok)
8379                         return -EINVAL;
8380                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8381                         return -EINVAL;
8382                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8383                         return -EINVAL;
8384                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8385                         return -EINVAL;
8386                 if (tok->offset + tok->len > data_size)
8387                         return -EINVAL;
8388         }
8389
8390         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8391                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8392                 if (!rdev->wiphy.wowlan->tcp->seq)
8393                         return -EINVAL;
8394                 if (seq->len == 0 || seq->len > 4)
8395                         return -EINVAL;
8396                 if (seq->len + seq->offset > data_size)
8397                         return -EINVAL;
8398         }
8399
8400         size = sizeof(*cfg);
8401         size += data_size;
8402         size += wake_size + wake_mask_size;
8403         size += tokens_size;
8404
8405         cfg = kzalloc(size, GFP_KERNEL);
8406         if (!cfg)
8407                 return -ENOMEM;
8408         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8409         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8410         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8411                ETH_ALEN);
8412         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8413                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8414         else
8415                 port = 0;
8416 #ifdef CONFIG_INET
8417         /* allocate a socket and port for it and use it */
8418         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8419                             IPPROTO_TCP, &cfg->sock, 1);
8420         if (err) {
8421                 kfree(cfg);
8422                 return err;
8423         }
8424         if (inet_csk_get_port(cfg->sock->sk, port)) {
8425                 sock_release(cfg->sock);
8426                 kfree(cfg);
8427                 return -EADDRINUSE;
8428         }
8429         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8430 #else
8431         if (!port) {
8432                 kfree(cfg);
8433                 return -EINVAL;
8434         }
8435         cfg->src_port = port;
8436 #endif
8437
8438         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8439         cfg->payload_len = data_size;
8440         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8441         memcpy((void *)cfg->payload,
8442                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8443                data_size);
8444         if (seq)
8445                 cfg->payload_seq = *seq;
8446         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8447         cfg->wake_len = wake_size;
8448         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8449         memcpy((void *)cfg->wake_data,
8450                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8451                wake_size);
8452         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8453                          data_size + wake_size;
8454         memcpy((void *)cfg->wake_mask,
8455                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8456                wake_mask_size);
8457         if (tok) {
8458                 cfg->tokens_size = tokens_size;
8459                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8460         }
8461
8462         trig->tcp = cfg;
8463
8464         return 0;
8465 }
8466
8467 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8468 {
8469         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8470         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8471         struct cfg80211_wowlan new_triggers = {};
8472         struct cfg80211_wowlan *ntrig;
8473         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8474         int err, i;
8475         bool prev_enabled = rdev->wiphy.wowlan_config;
8476
8477         if (!wowlan)
8478                 return -EOPNOTSUPP;
8479
8480         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8481                 cfg80211_rdev_free_wowlan(rdev);
8482                 rdev->wiphy.wowlan_config = NULL;
8483                 goto set_wakeup;
8484         }
8485
8486         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8487                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8488                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8489                         nl80211_wowlan_policy);
8490         if (err)
8491                 return err;
8492
8493         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8494                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8495                         return -EINVAL;
8496                 new_triggers.any = true;
8497         }
8498
8499         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8500                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8501                         return -EINVAL;
8502                 new_triggers.disconnect = true;
8503         }
8504
8505         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8506                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8507                         return -EINVAL;
8508                 new_triggers.magic_pkt = true;
8509         }
8510
8511         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8512                 return -EINVAL;
8513
8514         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8515                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8516                         return -EINVAL;
8517                 new_triggers.gtk_rekey_failure = true;
8518         }
8519
8520         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8521                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8522                         return -EINVAL;
8523                 new_triggers.eap_identity_req = true;
8524         }
8525
8526         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8527                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8528                         return -EINVAL;
8529                 new_triggers.four_way_handshake = true;
8530         }
8531
8532         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8533                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8534                         return -EINVAL;
8535                 new_triggers.rfkill_release = true;
8536         }
8537
8538         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8539                 struct nlattr *pat;
8540                 int n_patterns = 0;
8541                 int rem, pat_len, mask_len, pkt_offset;
8542                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8543
8544                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8545                                     rem)
8546                         n_patterns++;
8547                 if (n_patterns > wowlan->n_patterns)
8548                         return -EINVAL;
8549
8550                 new_triggers.patterns = kcalloc(n_patterns,
8551                                                 sizeof(new_triggers.patterns[0]),
8552                                                 GFP_KERNEL);
8553                 if (!new_triggers.patterns)
8554                         return -ENOMEM;
8555
8556                 new_triggers.n_patterns = n_patterns;
8557                 i = 0;
8558
8559                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8560                                     rem) {
8561                         u8 *mask_pat;
8562
8563                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8564                                   nla_len(pat), NULL);
8565                         err = -EINVAL;
8566                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8567                             !pat_tb[NL80211_PKTPAT_PATTERN])
8568                                 goto error;
8569                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8570                         mask_len = DIV_ROUND_UP(pat_len, 8);
8571                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8572                                 goto error;
8573                         if (pat_len > wowlan->pattern_max_len ||
8574                             pat_len < wowlan->pattern_min_len)
8575                                 goto error;
8576
8577                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8578                                 pkt_offset = 0;
8579                         else
8580                                 pkt_offset = nla_get_u32(
8581                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8582                         if (pkt_offset > wowlan->max_pkt_offset)
8583                                 goto error;
8584                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8585
8586                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8587                         if (!mask_pat) {
8588                                 err = -ENOMEM;
8589                                 goto error;
8590                         }
8591                         new_triggers.patterns[i].mask = mask_pat;
8592                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8593                                mask_len);
8594                         mask_pat += mask_len;
8595                         new_triggers.patterns[i].pattern = mask_pat;
8596                         new_triggers.patterns[i].pattern_len = pat_len;
8597                         memcpy(mask_pat,
8598                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8599                                pat_len);
8600                         i++;
8601                 }
8602         }
8603
8604         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8605                 err = nl80211_parse_wowlan_tcp(
8606                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8607                         &new_triggers);
8608                 if (err)
8609                         goto error;
8610         }
8611
8612         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8613         if (!ntrig) {
8614                 err = -ENOMEM;
8615                 goto error;
8616         }
8617         cfg80211_rdev_free_wowlan(rdev);
8618         rdev->wiphy.wowlan_config = ntrig;
8619
8620  set_wakeup:
8621         if (rdev->ops->set_wakeup &&
8622             prev_enabled != !!rdev->wiphy.wowlan_config)
8623                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8624
8625         return 0;
8626  error:
8627         for (i = 0; i < new_triggers.n_patterns; i++)
8628                 kfree(new_triggers.patterns[i].mask);
8629         kfree(new_triggers.patterns);
8630         if (new_triggers.tcp && new_triggers.tcp->sock)
8631                 sock_release(new_triggers.tcp->sock);
8632         kfree(new_triggers.tcp);
8633         return err;
8634 }
8635 #endif
8636
8637 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8638                                        struct cfg80211_registered_device *rdev)
8639 {
8640         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8641         int i, j, pat_len;
8642         struct cfg80211_coalesce_rules *rule;
8643
8644         if (!rdev->coalesce->n_rules)
8645                 return 0;
8646
8647         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8648         if (!nl_rules)
8649                 return -ENOBUFS;
8650
8651         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8652                 nl_rule = nla_nest_start(msg, i + 1);
8653                 if (!nl_rule)
8654                         return -ENOBUFS;
8655
8656                 rule = &rdev->coalesce->rules[i];
8657                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8658                                 rule->delay))
8659                         return -ENOBUFS;
8660
8661                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8662                                 rule->condition))
8663                         return -ENOBUFS;
8664
8665                 nl_pats = nla_nest_start(msg,
8666                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8667                 if (!nl_pats)
8668                         return -ENOBUFS;
8669
8670                 for (j = 0; j < rule->n_patterns; j++) {
8671                         nl_pat = nla_nest_start(msg, j + 1);
8672                         if (!nl_pat)
8673                                 return -ENOBUFS;
8674                         pat_len = rule->patterns[j].pattern_len;
8675                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8676                                     DIV_ROUND_UP(pat_len, 8),
8677                                     rule->patterns[j].mask) ||
8678                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8679                                     rule->patterns[j].pattern) ||
8680                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8681                                         rule->patterns[j].pkt_offset))
8682                                 return -ENOBUFS;
8683                         nla_nest_end(msg, nl_pat);
8684                 }
8685                 nla_nest_end(msg, nl_pats);
8686                 nla_nest_end(msg, nl_rule);
8687         }
8688         nla_nest_end(msg, nl_rules);
8689
8690         return 0;
8691 }
8692
8693 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8694 {
8695         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8696         struct sk_buff *msg;
8697         void *hdr;
8698
8699         if (!rdev->wiphy.coalesce)
8700                 return -EOPNOTSUPP;
8701
8702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8703         if (!msg)
8704                 return -ENOMEM;
8705
8706         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8707                              NL80211_CMD_GET_COALESCE);
8708         if (!hdr)
8709                 goto nla_put_failure;
8710
8711         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8712                 goto nla_put_failure;
8713
8714         genlmsg_end(msg, hdr);
8715         return genlmsg_reply(msg, info);
8716
8717 nla_put_failure:
8718         nlmsg_free(msg);
8719         return -ENOBUFS;
8720 }
8721
8722 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8723 {
8724         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8725         int i, j;
8726         struct cfg80211_coalesce_rules *rule;
8727
8728         if (!coalesce)
8729                 return;
8730
8731         for (i = 0; i < coalesce->n_rules; i++) {
8732                 rule = &coalesce->rules[i];
8733                 for (j = 0; j < rule->n_patterns; j++)
8734                         kfree(rule->patterns[j].mask);
8735                 kfree(rule->patterns);
8736         }
8737         kfree(coalesce->rules);
8738         kfree(coalesce);
8739         rdev->coalesce = NULL;
8740 }
8741
8742 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8743                                        struct nlattr *rule,
8744                                        struct cfg80211_coalesce_rules *new_rule)
8745 {
8746         int err, i;
8747         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8748         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8749         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8750         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8751
8752         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8753                         nla_len(rule), nl80211_coalesce_policy);
8754         if (err)
8755                 return err;
8756
8757         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8758                 new_rule->delay =
8759                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8760         if (new_rule->delay > coalesce->max_delay)
8761                 return -EINVAL;
8762
8763         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8764                 new_rule->condition =
8765                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8766         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8767             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8768                 return -EINVAL;
8769
8770         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8771                 return -EINVAL;
8772
8773         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8774                             rem)
8775                 n_patterns++;
8776         if (n_patterns > coalesce->n_patterns)
8777                 return -EINVAL;
8778
8779         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8780                                      GFP_KERNEL);
8781         if (!new_rule->patterns)
8782                 return -ENOMEM;
8783
8784         new_rule->n_patterns = n_patterns;
8785         i = 0;
8786
8787         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8788                             rem) {
8789                 u8 *mask_pat;
8790
8791                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8792                           nla_len(pat), NULL);
8793                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8794                     !pat_tb[NL80211_PKTPAT_PATTERN])
8795                         return -EINVAL;
8796                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8797                 mask_len = DIV_ROUND_UP(pat_len, 8);
8798                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8799                         return -EINVAL;
8800                 if (pat_len > coalesce->pattern_max_len ||
8801                     pat_len < coalesce->pattern_min_len)
8802                         return -EINVAL;
8803
8804                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8805                         pkt_offset = 0;
8806                 else
8807                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8808                 if (pkt_offset > coalesce->max_pkt_offset)
8809                         return -EINVAL;
8810                 new_rule->patterns[i].pkt_offset = pkt_offset;
8811
8812                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8813                 if (!mask_pat)
8814                         return -ENOMEM;
8815
8816                 new_rule->patterns[i].mask = mask_pat;
8817                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8818                        mask_len);
8819
8820                 mask_pat += mask_len;
8821                 new_rule->patterns[i].pattern = mask_pat;
8822                 new_rule->patterns[i].pattern_len = pat_len;
8823                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8824                        pat_len);
8825                 i++;
8826         }
8827
8828         return 0;
8829 }
8830
8831 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8832 {
8833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8834         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8835         struct cfg80211_coalesce new_coalesce = {};
8836         struct cfg80211_coalesce *n_coalesce;
8837         int err, rem_rule, n_rules = 0, i, j;
8838         struct nlattr *rule;
8839         struct cfg80211_coalesce_rules *tmp_rule;
8840
8841         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8842                 return -EOPNOTSUPP;
8843
8844         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8845                 cfg80211_rdev_free_coalesce(rdev);
8846                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8847                 return 0;
8848         }
8849
8850         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8851                             rem_rule)
8852                 n_rules++;
8853         if (n_rules > coalesce->n_rules)
8854                 return -EINVAL;
8855
8856         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8857                                      GFP_KERNEL);
8858         if (!new_coalesce.rules)
8859                 return -ENOMEM;
8860
8861         new_coalesce.n_rules = n_rules;
8862         i = 0;
8863
8864         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8865                             rem_rule) {
8866                 err = nl80211_parse_coalesce_rule(rdev, rule,
8867                                                   &new_coalesce.rules[i]);
8868                 if (err)
8869                         goto error;
8870
8871                 i++;
8872         }
8873
8874         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8875         if (err)
8876                 goto error;
8877
8878         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8879         if (!n_coalesce) {
8880                 err = -ENOMEM;
8881                 goto error;
8882         }
8883         cfg80211_rdev_free_coalesce(rdev);
8884         rdev->coalesce = n_coalesce;
8885
8886         return 0;
8887 error:
8888         for (i = 0; i < new_coalesce.n_rules; i++) {
8889                 tmp_rule = &new_coalesce.rules[i];
8890                 for (j = 0; j < tmp_rule->n_patterns; j++)
8891                         kfree(tmp_rule->patterns[j].mask);
8892                 kfree(tmp_rule->patterns);
8893         }
8894         kfree(new_coalesce.rules);
8895
8896         return err;
8897 }
8898
8899 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8900 {
8901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8902         struct net_device *dev = info->user_ptr[1];
8903         struct wireless_dev *wdev = dev->ieee80211_ptr;
8904         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8905         struct cfg80211_gtk_rekey_data rekey_data;
8906         int err;
8907
8908         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8909                 return -EINVAL;
8910
8911         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8912                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8913                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8914                         nl80211_rekey_policy);
8915         if (err)
8916                 return err;
8917
8918         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8919                 return -ERANGE;
8920         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8921                 return -ERANGE;
8922         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8923                 return -ERANGE;
8924
8925         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8926                NL80211_KEK_LEN);
8927         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8928                NL80211_KCK_LEN);
8929         memcpy(rekey_data.replay_ctr,
8930                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8931                NL80211_REPLAY_CTR_LEN);
8932
8933         wdev_lock(wdev);
8934         if (!wdev->current_bss) {
8935                 err = -ENOTCONN;
8936                 goto out;
8937         }
8938
8939         if (!rdev->ops->set_rekey_data) {
8940                 err = -EOPNOTSUPP;
8941                 goto out;
8942         }
8943
8944         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8945  out:
8946         wdev_unlock(wdev);
8947         return err;
8948 }
8949
8950 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8951                                              struct genl_info *info)
8952 {
8953         struct net_device *dev = info->user_ptr[1];
8954         struct wireless_dev *wdev = dev->ieee80211_ptr;
8955
8956         if (wdev->iftype != NL80211_IFTYPE_AP &&
8957             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8958                 return -EINVAL;
8959
8960         if (wdev->ap_unexpected_nlportid)
8961                 return -EBUSY;
8962
8963         wdev->ap_unexpected_nlportid = info->snd_portid;
8964         return 0;
8965 }
8966
8967 static int nl80211_probe_client(struct sk_buff *skb,
8968                                 struct genl_info *info)
8969 {
8970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8971         struct net_device *dev = info->user_ptr[1];
8972         struct wireless_dev *wdev = dev->ieee80211_ptr;
8973         struct sk_buff *msg;
8974         void *hdr;
8975         const u8 *addr;
8976         u64 cookie;
8977         int err;
8978
8979         if (wdev->iftype != NL80211_IFTYPE_AP &&
8980             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8981                 return -EOPNOTSUPP;
8982
8983         if (!info->attrs[NL80211_ATTR_MAC])
8984                 return -EINVAL;
8985
8986         if (!rdev->ops->probe_client)
8987                 return -EOPNOTSUPP;
8988
8989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8990         if (!msg)
8991                 return -ENOMEM;
8992
8993         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8994                              NL80211_CMD_PROBE_CLIENT);
8995         if (!hdr) {
8996                 err = -ENOBUFS;
8997                 goto free_msg;
8998         }
8999
9000         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9001
9002         err = rdev_probe_client(rdev, dev, addr, &cookie);
9003         if (err)
9004                 goto free_msg;
9005
9006         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9007                 goto nla_put_failure;
9008
9009         genlmsg_end(msg, hdr);
9010
9011         return genlmsg_reply(msg, info);
9012
9013  nla_put_failure:
9014         err = -ENOBUFS;
9015  free_msg:
9016         nlmsg_free(msg);
9017         return err;
9018 }
9019
9020 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9021 {
9022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9023         struct cfg80211_beacon_registration *reg, *nreg;
9024         int rv;
9025
9026         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9027                 return -EOPNOTSUPP;
9028
9029         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9030         if (!nreg)
9031                 return -ENOMEM;
9032
9033         /* First, check if already registered. */
9034         spin_lock_bh(&rdev->beacon_registrations_lock);
9035         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9036                 if (reg->nlportid == info->snd_portid) {
9037                         rv = -EALREADY;
9038                         goto out_err;
9039                 }
9040         }
9041         /* Add it to the list */
9042         nreg->nlportid = info->snd_portid;
9043         list_add(&nreg->list, &rdev->beacon_registrations);
9044
9045         spin_unlock_bh(&rdev->beacon_registrations_lock);
9046
9047         return 0;
9048 out_err:
9049         spin_unlock_bh(&rdev->beacon_registrations_lock);
9050         kfree(nreg);
9051         return rv;
9052 }
9053
9054 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9055 {
9056         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9057         struct wireless_dev *wdev = info->user_ptr[1];
9058         int err;
9059
9060         if (!rdev->ops->start_p2p_device)
9061                 return -EOPNOTSUPP;
9062
9063         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9064                 return -EOPNOTSUPP;
9065
9066         if (wdev->p2p_started)
9067                 return 0;
9068
9069         if (rfkill_blocked(rdev->rfkill))
9070                 return -ERFKILL;
9071
9072         err = rdev_start_p2p_device(rdev, wdev);
9073         if (err)
9074                 return err;
9075
9076         wdev->p2p_started = true;
9077         rdev->opencount++;
9078
9079         return 0;
9080 }
9081
9082 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9083 {
9084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9085         struct wireless_dev *wdev = info->user_ptr[1];
9086
9087         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9088                 return -EOPNOTSUPP;
9089
9090         if (!rdev->ops->stop_p2p_device)
9091                 return -EOPNOTSUPP;
9092
9093         cfg80211_stop_p2p_device(rdev, wdev);
9094
9095         return 0;
9096 }
9097
9098 static int nl80211_get_protocol_features(struct sk_buff *skb,
9099                                          struct genl_info *info)
9100 {
9101         void *hdr;
9102         struct sk_buff *msg;
9103
9104         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9105         if (!msg)
9106                 return -ENOMEM;
9107
9108         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9109                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9110         if (!hdr)
9111                 goto nla_put_failure;
9112
9113         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9114                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9115                 goto nla_put_failure;
9116
9117         genlmsg_end(msg, hdr);
9118         return genlmsg_reply(msg, info);
9119
9120  nla_put_failure:
9121         kfree_skb(msg);
9122         return -ENOBUFS;
9123 }
9124
9125 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9126 {
9127         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9128         struct cfg80211_update_ft_ies_params ft_params;
9129         struct net_device *dev = info->user_ptr[1];
9130
9131         if (!rdev->ops->update_ft_ies)
9132                 return -EOPNOTSUPP;
9133
9134         if (!info->attrs[NL80211_ATTR_MDID] ||
9135             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9136                 return -EINVAL;
9137
9138         memset(&ft_params, 0, sizeof(ft_params));
9139         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9140         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9141         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9142
9143         return rdev_update_ft_ies(rdev, dev, &ft_params);
9144 }
9145
9146 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9147                                        struct genl_info *info)
9148 {
9149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9150         struct wireless_dev *wdev = info->user_ptr[1];
9151         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9152         u16 duration;
9153         int ret;
9154
9155         if (!rdev->ops->crit_proto_start)
9156                 return -EOPNOTSUPP;
9157
9158         if (WARN_ON(!rdev->ops->crit_proto_stop))
9159                 return -EINVAL;
9160
9161         if (rdev->crit_proto_nlportid)
9162                 return -EBUSY;
9163
9164         /* determine protocol if provided */
9165         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9166                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9167
9168         if (proto >= NUM_NL80211_CRIT_PROTO)
9169                 return -EINVAL;
9170
9171         /* timeout must be provided */
9172         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9173                 return -EINVAL;
9174
9175         duration =
9176                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9177
9178         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9179                 return -ERANGE;
9180
9181         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9182         if (!ret)
9183                 rdev->crit_proto_nlportid = info->snd_portid;
9184
9185         return ret;
9186 }
9187
9188 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9189                                       struct genl_info *info)
9190 {
9191         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9192         struct wireless_dev *wdev = info->user_ptr[1];
9193
9194         if (!rdev->ops->crit_proto_stop)
9195                 return -EOPNOTSUPP;
9196
9197         if (rdev->crit_proto_nlportid) {
9198                 rdev->crit_proto_nlportid = 0;
9199                 rdev_crit_proto_stop(rdev, wdev);
9200         }
9201         return 0;
9202 }
9203
9204 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9205 {
9206         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9207         struct wireless_dev *wdev =
9208                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9209         int i, err;
9210         u32 vid, subcmd;
9211
9212         if (!rdev->wiphy.vendor_commands)
9213                 return -EOPNOTSUPP;
9214
9215         if (IS_ERR(wdev)) {
9216                 err = PTR_ERR(wdev);
9217                 if (err != -EINVAL)
9218                         return err;
9219                 wdev = NULL;
9220         } else if (wdev->wiphy != &rdev->wiphy) {
9221                 return -EINVAL;
9222         }
9223
9224         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9225             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9226                 return -EINVAL;
9227
9228         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9229         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9230         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9231                 const struct wiphy_vendor_command *vcmd;
9232                 void *data = NULL;
9233                 int len = 0;
9234
9235                 vcmd = &rdev->wiphy.vendor_commands[i];
9236
9237                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9238                         continue;
9239
9240                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9241                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9242                         if (!wdev)
9243                                 return -EINVAL;
9244                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9245                             !wdev->netdev)
9246                                 return -EINVAL;
9247
9248                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9249                                 if (wdev->netdev &&
9250                                     !netif_running(wdev->netdev))
9251                                         return -ENETDOWN;
9252                                 if (!wdev->netdev && !wdev->p2p_started)
9253                                         return -ENETDOWN;
9254                         }
9255                 } else {
9256                         wdev = NULL;
9257                 }
9258
9259                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9260                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9261                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9262                 }
9263
9264                 rdev->cur_cmd_info = info;
9265                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9266                                                           data, len);
9267                 rdev->cur_cmd_info = NULL;
9268                 return err;
9269         }
9270
9271         return -EOPNOTSUPP;
9272 }
9273
9274 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
9275                                            enum nl80211_commands cmd,
9276                                            enum nl80211_attrs attr,
9277                                            int approxlen)
9278 {
9279         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
9280
9281         if (WARN_ON(!rdev->cur_cmd_info))
9282                 return NULL;
9283
9284         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
9285                                            rdev->cur_cmd_info->snd_portid,
9286                                            rdev->cur_cmd_info->snd_seq,
9287                                            cmd, attr, NULL, GFP_KERNEL);
9288 }
9289 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
9290
9291 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
9292 {
9293         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
9294         void *hdr = ((void **)skb->cb)[1];
9295         struct nlattr *data = ((void **)skb->cb)[2];
9296
9297         if (WARN_ON(!rdev->cur_cmd_info)) {
9298                 kfree_skb(skb);
9299                 return -EINVAL;
9300         }
9301
9302         nla_nest_end(skb, data);
9303         genlmsg_end(skb, hdr);
9304         return genlmsg_reply(skb, rdev->cur_cmd_info);
9305 }
9306 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
9307
9308
9309 static int nl80211_set_qos_map(struct sk_buff *skb,
9310                                struct genl_info *info)
9311 {
9312         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9313         struct cfg80211_qos_map *qos_map = NULL;
9314         struct net_device *dev = info->user_ptr[1];
9315         u8 *pos, len, num_des, des_len, des;
9316         int ret;
9317
9318         if (!rdev->ops->set_qos_map)
9319                 return -EOPNOTSUPP;
9320
9321         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
9322                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
9323                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
9324
9325                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
9326                     len > IEEE80211_QOS_MAP_LEN_MAX)
9327                         return -EINVAL;
9328
9329                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
9330                 if (!qos_map)
9331                         return -ENOMEM;
9332
9333                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
9334                 if (num_des) {
9335                         des_len = num_des *
9336                                 sizeof(struct cfg80211_dscp_exception);
9337                         memcpy(qos_map->dscp_exception, pos, des_len);
9338                         qos_map->num_des = num_des;
9339                         for (des = 0; des < num_des; des++) {
9340                                 if (qos_map->dscp_exception[des].up > 7) {
9341                                         kfree(qos_map);
9342                                         return -EINVAL;
9343                                 }
9344                         }
9345                         pos += des_len;
9346                 }
9347                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
9348         }
9349
9350         wdev_lock(dev->ieee80211_ptr);
9351         ret = nl80211_key_allowed(dev->ieee80211_ptr);
9352         if (!ret)
9353                 ret = rdev_set_qos_map(rdev, dev, qos_map);
9354         wdev_unlock(dev->ieee80211_ptr);
9355
9356         kfree(qos_map);
9357         return ret;
9358 }
9359
9360 #define NL80211_FLAG_NEED_WIPHY         0x01
9361 #define NL80211_FLAG_NEED_NETDEV        0x02
9362 #define NL80211_FLAG_NEED_RTNL          0x04
9363 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
9364 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
9365                                          NL80211_FLAG_CHECK_NETDEV_UP)
9366 #define NL80211_FLAG_NEED_WDEV          0x10
9367 /* If a netdev is associated, it must be UP, P2P must be started */
9368 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
9369                                          NL80211_FLAG_CHECK_NETDEV_UP)
9370
9371 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
9372                             struct genl_info *info)
9373 {
9374         struct cfg80211_registered_device *rdev;
9375         struct wireless_dev *wdev;
9376         struct net_device *dev;
9377         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
9378
9379         if (rtnl)
9380                 rtnl_lock();
9381
9382         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
9383                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
9384                 if (IS_ERR(rdev)) {
9385                         if (rtnl)
9386                                 rtnl_unlock();
9387                         return PTR_ERR(rdev);
9388                 }
9389                 info->user_ptr[0] = rdev;
9390         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
9391                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9392                 ASSERT_RTNL();
9393
9394                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9395                                                   info->attrs);
9396                 if (IS_ERR(wdev)) {
9397                         if (rtnl)
9398                                 rtnl_unlock();
9399                         return PTR_ERR(wdev);
9400                 }
9401
9402                 dev = wdev->netdev;
9403                 rdev = wiphy_to_rdev(wdev->wiphy);
9404
9405                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9406                         if (!dev) {
9407                                 if (rtnl)
9408                                         rtnl_unlock();
9409                                 return -EINVAL;
9410                         }
9411
9412                         info->user_ptr[1] = dev;
9413                 } else {
9414                         info->user_ptr[1] = wdev;
9415                 }
9416
9417                 if (dev) {
9418                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9419                             !netif_running(dev)) {
9420                                 if (rtnl)
9421                                         rtnl_unlock();
9422                                 return -ENETDOWN;
9423                         }
9424
9425                         dev_hold(dev);
9426                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9427                         if (!wdev->p2p_started) {
9428                                 if (rtnl)
9429                                         rtnl_unlock();
9430                                 return -ENETDOWN;
9431                         }
9432                 }
9433
9434                 info->user_ptr[0] = rdev;
9435         }
9436
9437         return 0;
9438 }
9439
9440 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
9441                               struct genl_info *info)
9442 {
9443         if (info->user_ptr[1]) {
9444                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9445                         struct wireless_dev *wdev = info->user_ptr[1];
9446
9447                         if (wdev->netdev)
9448                                 dev_put(wdev->netdev);
9449                 } else {
9450                         dev_put(info->user_ptr[1]);
9451                 }
9452         }
9453         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
9454                 rtnl_unlock();
9455 }
9456
9457 static const struct genl_ops nl80211_ops[] = {
9458         {
9459                 .cmd = NL80211_CMD_GET_WIPHY,
9460                 .doit = nl80211_get_wiphy,
9461                 .dumpit = nl80211_dump_wiphy,
9462                 .done = nl80211_dump_wiphy_done,
9463                 .policy = nl80211_policy,
9464                 /* can be retrieved by unprivileged users */
9465                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9466                                   NL80211_FLAG_NEED_RTNL,
9467         },
9468         {
9469                 .cmd = NL80211_CMD_SET_WIPHY,
9470                 .doit = nl80211_set_wiphy,
9471                 .policy = nl80211_policy,
9472                 .flags = GENL_ADMIN_PERM,
9473                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9474         },
9475         {
9476                 .cmd = NL80211_CMD_GET_INTERFACE,
9477                 .doit = nl80211_get_interface,
9478                 .dumpit = nl80211_dump_interface,
9479                 .policy = nl80211_policy,
9480                 /* can be retrieved by unprivileged users */
9481                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9482                                   NL80211_FLAG_NEED_RTNL,
9483         },
9484         {
9485                 .cmd = NL80211_CMD_SET_INTERFACE,
9486                 .doit = nl80211_set_interface,
9487                 .policy = nl80211_policy,
9488                 .flags = GENL_ADMIN_PERM,
9489                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9490                                   NL80211_FLAG_NEED_RTNL,
9491         },
9492         {
9493                 .cmd = NL80211_CMD_NEW_INTERFACE,
9494                 .doit = nl80211_new_interface,
9495                 .policy = nl80211_policy,
9496                 .flags = GENL_ADMIN_PERM,
9497                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9498                                   NL80211_FLAG_NEED_RTNL,
9499         },
9500         {
9501                 .cmd = NL80211_CMD_DEL_INTERFACE,
9502                 .doit = nl80211_del_interface,
9503                 .policy = nl80211_policy,
9504                 .flags = GENL_ADMIN_PERM,
9505                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9506                                   NL80211_FLAG_NEED_RTNL,
9507         },
9508         {
9509                 .cmd = NL80211_CMD_GET_KEY,
9510                 .doit = nl80211_get_key,
9511                 .policy = nl80211_policy,
9512                 .flags = GENL_ADMIN_PERM,
9513                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9514                                   NL80211_FLAG_NEED_RTNL,
9515         },
9516         {
9517                 .cmd = NL80211_CMD_SET_KEY,
9518                 .doit = nl80211_set_key,
9519                 .policy = nl80211_policy,
9520                 .flags = GENL_ADMIN_PERM,
9521                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9522                                   NL80211_FLAG_NEED_RTNL,
9523         },
9524         {
9525                 .cmd = NL80211_CMD_NEW_KEY,
9526                 .doit = nl80211_new_key,
9527                 .policy = nl80211_policy,
9528                 .flags = GENL_ADMIN_PERM,
9529                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9530                                   NL80211_FLAG_NEED_RTNL,
9531         },
9532         {
9533                 .cmd = NL80211_CMD_DEL_KEY,
9534                 .doit = nl80211_del_key,
9535                 .policy = nl80211_policy,
9536                 .flags = GENL_ADMIN_PERM,
9537                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9538                                   NL80211_FLAG_NEED_RTNL,
9539         },
9540         {
9541                 .cmd = NL80211_CMD_SET_BEACON,
9542                 .policy = nl80211_policy,
9543                 .flags = GENL_ADMIN_PERM,
9544                 .doit = nl80211_set_beacon,
9545                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9546                                   NL80211_FLAG_NEED_RTNL,
9547         },
9548         {
9549                 .cmd = NL80211_CMD_START_AP,
9550                 .policy = nl80211_policy,
9551                 .flags = GENL_ADMIN_PERM,
9552                 .doit = nl80211_start_ap,
9553                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9554                                   NL80211_FLAG_NEED_RTNL,
9555         },
9556         {
9557                 .cmd = NL80211_CMD_STOP_AP,
9558                 .policy = nl80211_policy,
9559                 .flags = GENL_ADMIN_PERM,
9560                 .doit = nl80211_stop_ap,
9561                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9562                                   NL80211_FLAG_NEED_RTNL,
9563         },
9564         {
9565                 .cmd = NL80211_CMD_GET_STATION,
9566                 .doit = nl80211_get_station,
9567                 .dumpit = nl80211_dump_station,
9568                 .policy = nl80211_policy,
9569                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9570                                   NL80211_FLAG_NEED_RTNL,
9571         },
9572         {
9573                 .cmd = NL80211_CMD_SET_STATION,
9574                 .doit = nl80211_set_station,
9575                 .policy = nl80211_policy,
9576                 .flags = GENL_ADMIN_PERM,
9577                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9578                                   NL80211_FLAG_NEED_RTNL,
9579         },
9580         {
9581                 .cmd = NL80211_CMD_NEW_STATION,
9582                 .doit = nl80211_new_station,
9583                 .policy = nl80211_policy,
9584                 .flags = GENL_ADMIN_PERM,
9585                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9586                                   NL80211_FLAG_NEED_RTNL,
9587         },
9588         {
9589                 .cmd = NL80211_CMD_DEL_STATION,
9590                 .doit = nl80211_del_station,
9591                 .policy = nl80211_policy,
9592                 .flags = GENL_ADMIN_PERM,
9593                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9594                                   NL80211_FLAG_NEED_RTNL,
9595         },
9596         {
9597                 .cmd = NL80211_CMD_GET_MPATH,
9598                 .doit = nl80211_get_mpath,
9599                 .dumpit = nl80211_dump_mpath,
9600                 .policy = nl80211_policy,
9601                 .flags = GENL_ADMIN_PERM,
9602                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9603                                   NL80211_FLAG_NEED_RTNL,
9604         },
9605         {
9606                 .cmd = NL80211_CMD_SET_MPATH,
9607                 .doit = nl80211_set_mpath,
9608                 .policy = nl80211_policy,
9609                 .flags = GENL_ADMIN_PERM,
9610                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9611                                   NL80211_FLAG_NEED_RTNL,
9612         },
9613         {
9614                 .cmd = NL80211_CMD_NEW_MPATH,
9615                 .doit = nl80211_new_mpath,
9616                 .policy = nl80211_policy,
9617                 .flags = GENL_ADMIN_PERM,
9618                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9619                                   NL80211_FLAG_NEED_RTNL,
9620         },
9621         {
9622                 .cmd = NL80211_CMD_DEL_MPATH,
9623                 .doit = nl80211_del_mpath,
9624                 .policy = nl80211_policy,
9625                 .flags = GENL_ADMIN_PERM,
9626                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9627                                   NL80211_FLAG_NEED_RTNL,
9628         },
9629         {
9630                 .cmd = NL80211_CMD_SET_BSS,
9631                 .doit = nl80211_set_bss,
9632                 .policy = nl80211_policy,
9633                 .flags = GENL_ADMIN_PERM,
9634                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9635                                   NL80211_FLAG_NEED_RTNL,
9636         },
9637         {
9638                 .cmd = NL80211_CMD_GET_REG,
9639                 .doit = nl80211_get_reg,
9640                 .policy = nl80211_policy,
9641                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9642                 /* can be retrieved by unprivileged users */
9643         },
9644         {
9645                 .cmd = NL80211_CMD_SET_REG,
9646                 .doit = nl80211_set_reg,
9647                 .policy = nl80211_policy,
9648                 .flags = GENL_ADMIN_PERM,
9649                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9650         },
9651         {
9652                 .cmd = NL80211_CMD_REQ_SET_REG,
9653                 .doit = nl80211_req_set_reg,
9654                 .policy = nl80211_policy,
9655                 .flags = GENL_ADMIN_PERM,
9656         },
9657         {
9658                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9659                 .doit = nl80211_get_mesh_config,
9660                 .policy = nl80211_policy,
9661                 /* can be retrieved by unprivileged users */
9662                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9663                                   NL80211_FLAG_NEED_RTNL,
9664         },
9665         {
9666                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9667                 .doit = nl80211_update_mesh_config,
9668                 .policy = nl80211_policy,
9669                 .flags = GENL_ADMIN_PERM,
9670                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9671                                   NL80211_FLAG_NEED_RTNL,
9672         },
9673         {
9674                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9675                 .doit = nl80211_trigger_scan,
9676                 .policy = nl80211_policy,
9677                 .flags = GENL_ADMIN_PERM,
9678                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9679                                   NL80211_FLAG_NEED_RTNL,
9680         },
9681         {
9682                 .cmd = NL80211_CMD_GET_SCAN,
9683                 .policy = nl80211_policy,
9684                 .dumpit = nl80211_dump_scan,
9685         },
9686         {
9687                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9688                 .doit = nl80211_start_sched_scan,
9689                 .policy = nl80211_policy,
9690                 .flags = GENL_ADMIN_PERM,
9691                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9692                                   NL80211_FLAG_NEED_RTNL,
9693         },
9694         {
9695                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9696                 .doit = nl80211_stop_sched_scan,
9697                 .policy = nl80211_policy,
9698                 .flags = GENL_ADMIN_PERM,
9699                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9700                                   NL80211_FLAG_NEED_RTNL,
9701         },
9702         {
9703                 .cmd = NL80211_CMD_AUTHENTICATE,
9704                 .doit = nl80211_authenticate,
9705                 .policy = nl80211_policy,
9706                 .flags = GENL_ADMIN_PERM,
9707                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9708                                   NL80211_FLAG_NEED_RTNL,
9709         },
9710         {
9711                 .cmd = NL80211_CMD_ASSOCIATE,
9712                 .doit = nl80211_associate,
9713                 .policy = nl80211_policy,
9714                 .flags = GENL_ADMIN_PERM,
9715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9716                                   NL80211_FLAG_NEED_RTNL,
9717         },
9718         {
9719                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9720                 .doit = nl80211_deauthenticate,
9721                 .policy = nl80211_policy,
9722                 .flags = GENL_ADMIN_PERM,
9723                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9724                                   NL80211_FLAG_NEED_RTNL,
9725         },
9726         {
9727                 .cmd = NL80211_CMD_DISASSOCIATE,
9728                 .doit = nl80211_disassociate,
9729                 .policy = nl80211_policy,
9730                 .flags = GENL_ADMIN_PERM,
9731                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9732                                   NL80211_FLAG_NEED_RTNL,
9733         },
9734         {
9735                 .cmd = NL80211_CMD_JOIN_IBSS,
9736                 .doit = nl80211_join_ibss,
9737                 .policy = nl80211_policy,
9738                 .flags = GENL_ADMIN_PERM,
9739                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9740                                   NL80211_FLAG_NEED_RTNL,
9741         },
9742         {
9743                 .cmd = NL80211_CMD_LEAVE_IBSS,
9744                 .doit = nl80211_leave_ibss,
9745                 .policy = nl80211_policy,
9746                 .flags = GENL_ADMIN_PERM,
9747                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9748                                   NL80211_FLAG_NEED_RTNL,
9749         },
9750 #ifdef CONFIG_NL80211_TESTMODE
9751         {
9752                 .cmd = NL80211_CMD_TESTMODE,
9753                 .doit = nl80211_testmode_do,
9754                 .dumpit = nl80211_testmode_dump,
9755                 .policy = nl80211_policy,
9756                 .flags = GENL_ADMIN_PERM,
9757                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9758                                   NL80211_FLAG_NEED_RTNL,
9759         },
9760 #endif
9761         {
9762                 .cmd = NL80211_CMD_CONNECT,
9763                 .doit = nl80211_connect,
9764                 .policy = nl80211_policy,
9765                 .flags = GENL_ADMIN_PERM,
9766                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9767                                   NL80211_FLAG_NEED_RTNL,
9768         },
9769         {
9770                 .cmd = NL80211_CMD_DISCONNECT,
9771                 .doit = nl80211_disconnect,
9772                 .policy = nl80211_policy,
9773                 .flags = GENL_ADMIN_PERM,
9774                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9775                                   NL80211_FLAG_NEED_RTNL,
9776         },
9777         {
9778                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9779                 .doit = nl80211_wiphy_netns,
9780                 .policy = nl80211_policy,
9781                 .flags = GENL_ADMIN_PERM,
9782                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9783                                   NL80211_FLAG_NEED_RTNL,
9784         },
9785         {
9786                 .cmd = NL80211_CMD_GET_SURVEY,
9787                 .policy = nl80211_policy,
9788                 .dumpit = nl80211_dump_survey,
9789         },
9790         {
9791                 .cmd = NL80211_CMD_SET_PMKSA,
9792                 .doit = nl80211_setdel_pmksa,
9793                 .policy = nl80211_policy,
9794                 .flags = GENL_ADMIN_PERM,
9795                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9796                                   NL80211_FLAG_NEED_RTNL,
9797         },
9798         {
9799                 .cmd = NL80211_CMD_DEL_PMKSA,
9800                 .doit = nl80211_setdel_pmksa,
9801                 .policy = nl80211_policy,
9802                 .flags = GENL_ADMIN_PERM,
9803                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9804                                   NL80211_FLAG_NEED_RTNL,
9805         },
9806         {
9807                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9808                 .doit = nl80211_flush_pmksa,
9809                 .policy = nl80211_policy,
9810                 .flags = GENL_ADMIN_PERM,
9811                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9812                                   NL80211_FLAG_NEED_RTNL,
9813         },
9814         {
9815                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9816                 .doit = nl80211_remain_on_channel,
9817                 .policy = nl80211_policy,
9818                 .flags = GENL_ADMIN_PERM,
9819                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9820                                   NL80211_FLAG_NEED_RTNL,
9821         },
9822         {
9823                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9824                 .doit = nl80211_cancel_remain_on_channel,
9825                 .policy = nl80211_policy,
9826                 .flags = GENL_ADMIN_PERM,
9827                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9828                                   NL80211_FLAG_NEED_RTNL,
9829         },
9830         {
9831                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9832                 .doit = nl80211_set_tx_bitrate_mask,
9833                 .policy = nl80211_policy,
9834                 .flags = GENL_ADMIN_PERM,
9835                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9836                                   NL80211_FLAG_NEED_RTNL,
9837         },
9838         {
9839                 .cmd = NL80211_CMD_REGISTER_FRAME,
9840                 .doit = nl80211_register_mgmt,
9841                 .policy = nl80211_policy,
9842                 .flags = GENL_ADMIN_PERM,
9843                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9844                                   NL80211_FLAG_NEED_RTNL,
9845         },
9846         {
9847                 .cmd = NL80211_CMD_FRAME,
9848                 .doit = nl80211_tx_mgmt,
9849                 .policy = nl80211_policy,
9850                 .flags = GENL_ADMIN_PERM,
9851                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9852                                   NL80211_FLAG_NEED_RTNL,
9853         },
9854         {
9855                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9856                 .doit = nl80211_tx_mgmt_cancel_wait,
9857                 .policy = nl80211_policy,
9858                 .flags = GENL_ADMIN_PERM,
9859                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9860                                   NL80211_FLAG_NEED_RTNL,
9861         },
9862         {
9863                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9864                 .doit = nl80211_set_power_save,
9865                 .policy = nl80211_policy,
9866                 .flags = GENL_ADMIN_PERM,
9867                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9868                                   NL80211_FLAG_NEED_RTNL,
9869         },
9870         {
9871                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9872                 .doit = nl80211_get_power_save,
9873                 .policy = nl80211_policy,
9874                 /* can be retrieved by unprivileged users */
9875                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9876                                   NL80211_FLAG_NEED_RTNL,
9877         },
9878         {
9879                 .cmd = NL80211_CMD_SET_CQM,
9880                 .doit = nl80211_set_cqm,
9881                 .policy = nl80211_policy,
9882                 .flags = GENL_ADMIN_PERM,
9883                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9884                                   NL80211_FLAG_NEED_RTNL,
9885         },
9886         {
9887                 .cmd = NL80211_CMD_SET_CHANNEL,
9888                 .doit = nl80211_set_channel,
9889                 .policy = nl80211_policy,
9890                 .flags = GENL_ADMIN_PERM,
9891                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9892                                   NL80211_FLAG_NEED_RTNL,
9893         },
9894         {
9895                 .cmd = NL80211_CMD_SET_WDS_PEER,
9896                 .doit = nl80211_set_wds_peer,
9897                 .policy = nl80211_policy,
9898                 .flags = GENL_ADMIN_PERM,
9899                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9900                                   NL80211_FLAG_NEED_RTNL,
9901         },
9902         {
9903                 .cmd = NL80211_CMD_JOIN_MESH,
9904                 .doit = nl80211_join_mesh,
9905                 .policy = nl80211_policy,
9906                 .flags = GENL_ADMIN_PERM,
9907                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9908                                   NL80211_FLAG_NEED_RTNL,
9909         },
9910         {
9911                 .cmd = NL80211_CMD_LEAVE_MESH,
9912                 .doit = nl80211_leave_mesh,
9913                 .policy = nl80211_policy,
9914                 .flags = GENL_ADMIN_PERM,
9915                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9916                                   NL80211_FLAG_NEED_RTNL,
9917         },
9918 #ifdef CONFIG_PM
9919         {
9920                 .cmd = NL80211_CMD_GET_WOWLAN,
9921                 .doit = nl80211_get_wowlan,
9922                 .policy = nl80211_policy,
9923                 /* can be retrieved by unprivileged users */
9924                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9925                                   NL80211_FLAG_NEED_RTNL,
9926         },
9927         {
9928                 .cmd = NL80211_CMD_SET_WOWLAN,
9929                 .doit = nl80211_set_wowlan,
9930                 .policy = nl80211_policy,
9931                 .flags = GENL_ADMIN_PERM,
9932                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9933                                   NL80211_FLAG_NEED_RTNL,
9934         },
9935 #endif
9936         {
9937                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9938                 .doit = nl80211_set_rekey_data,
9939                 .policy = nl80211_policy,
9940                 .flags = GENL_ADMIN_PERM,
9941                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9942                                   NL80211_FLAG_NEED_RTNL,
9943         },
9944         {
9945                 .cmd = NL80211_CMD_TDLS_MGMT,
9946                 .doit = nl80211_tdls_mgmt,
9947                 .policy = nl80211_policy,
9948                 .flags = GENL_ADMIN_PERM,
9949                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9950                                   NL80211_FLAG_NEED_RTNL,
9951         },
9952         {
9953                 .cmd = NL80211_CMD_TDLS_OPER,
9954                 .doit = nl80211_tdls_oper,
9955                 .policy = nl80211_policy,
9956                 .flags = GENL_ADMIN_PERM,
9957                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9958                                   NL80211_FLAG_NEED_RTNL,
9959         },
9960         {
9961                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9962                 .doit = nl80211_register_unexpected_frame,
9963                 .policy = nl80211_policy,
9964                 .flags = GENL_ADMIN_PERM,
9965                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9966                                   NL80211_FLAG_NEED_RTNL,
9967         },
9968         {
9969                 .cmd = NL80211_CMD_PROBE_CLIENT,
9970                 .doit = nl80211_probe_client,
9971                 .policy = nl80211_policy,
9972                 .flags = GENL_ADMIN_PERM,
9973                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9974                                   NL80211_FLAG_NEED_RTNL,
9975         },
9976         {
9977                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9978                 .doit = nl80211_register_beacons,
9979                 .policy = nl80211_policy,
9980                 .flags = GENL_ADMIN_PERM,
9981                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9982                                   NL80211_FLAG_NEED_RTNL,
9983         },
9984         {
9985                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9986                 .doit = nl80211_set_noack_map,
9987                 .policy = nl80211_policy,
9988                 .flags = GENL_ADMIN_PERM,
9989                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9990                                   NL80211_FLAG_NEED_RTNL,
9991         },
9992         {
9993                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9994                 .doit = nl80211_start_p2p_device,
9995                 .policy = nl80211_policy,
9996                 .flags = GENL_ADMIN_PERM,
9997                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9998                                   NL80211_FLAG_NEED_RTNL,
9999         },
10000         {
10001                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
10002                 .doit = nl80211_stop_p2p_device,
10003                 .policy = nl80211_policy,
10004                 .flags = GENL_ADMIN_PERM,
10005                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10006                                   NL80211_FLAG_NEED_RTNL,
10007         },
10008         {
10009                 .cmd = NL80211_CMD_SET_MCAST_RATE,
10010                 .doit = nl80211_set_mcast_rate,
10011                 .policy = nl80211_policy,
10012                 .flags = GENL_ADMIN_PERM,
10013                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10014                                   NL80211_FLAG_NEED_RTNL,
10015         },
10016         {
10017                 .cmd = NL80211_CMD_SET_MAC_ACL,
10018                 .doit = nl80211_set_mac_acl,
10019                 .policy = nl80211_policy,
10020                 .flags = GENL_ADMIN_PERM,
10021                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10022                                   NL80211_FLAG_NEED_RTNL,
10023         },
10024         {
10025                 .cmd = NL80211_CMD_RADAR_DETECT,
10026                 .doit = nl80211_start_radar_detection,
10027                 .policy = nl80211_policy,
10028                 .flags = GENL_ADMIN_PERM,
10029                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10030                                   NL80211_FLAG_NEED_RTNL,
10031         },
10032         {
10033                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
10034                 .doit = nl80211_get_protocol_features,
10035                 .policy = nl80211_policy,
10036         },
10037         {
10038                 .cmd = NL80211_CMD_UPDATE_FT_IES,
10039                 .doit = nl80211_update_ft_ies,
10040                 .policy = nl80211_policy,
10041                 .flags = GENL_ADMIN_PERM,
10042                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10043                                   NL80211_FLAG_NEED_RTNL,
10044         },
10045         {
10046                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
10047                 .doit = nl80211_crit_protocol_start,
10048                 .policy = nl80211_policy,
10049                 .flags = GENL_ADMIN_PERM,
10050                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10051                                   NL80211_FLAG_NEED_RTNL,
10052         },
10053         {
10054                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
10055                 .doit = nl80211_crit_protocol_stop,
10056                 .policy = nl80211_policy,
10057                 .flags = GENL_ADMIN_PERM,
10058                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10059                                   NL80211_FLAG_NEED_RTNL,
10060         },
10061         {
10062                 .cmd = NL80211_CMD_GET_COALESCE,
10063                 .doit = nl80211_get_coalesce,
10064                 .policy = nl80211_policy,
10065                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10066                                   NL80211_FLAG_NEED_RTNL,
10067         },
10068         {
10069                 .cmd = NL80211_CMD_SET_COALESCE,
10070                 .doit = nl80211_set_coalesce,
10071                 .policy = nl80211_policy,
10072                 .flags = GENL_ADMIN_PERM,
10073                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10074                                   NL80211_FLAG_NEED_RTNL,
10075         },
10076         {
10077                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
10078                 .doit = nl80211_channel_switch,
10079                 .policy = nl80211_policy,
10080                 .flags = GENL_ADMIN_PERM,
10081                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10082                                   NL80211_FLAG_NEED_RTNL,
10083         },
10084         {
10085                 .cmd = NL80211_CMD_VENDOR,
10086                 .doit = nl80211_vendor_cmd,
10087                 .policy = nl80211_policy,
10088                 .flags = GENL_ADMIN_PERM,
10089                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10090                                   NL80211_FLAG_NEED_RTNL,
10091         },
10092         {
10093                 .cmd = NL80211_CMD_SET_QOS_MAP,
10094                 .doit = nl80211_set_qos_map,
10095                 .policy = nl80211_policy,
10096                 .flags = GENL_ADMIN_PERM,
10097                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10098                                   NL80211_FLAG_NEED_RTNL,
10099         },
10100 };
10101
10102 /* notification functions */
10103
10104 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
10105                           enum nl80211_commands cmd)
10106 {
10107         struct sk_buff *msg;
10108         struct nl80211_dump_wiphy_state state = {};
10109
10110         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
10111                 cmd != NL80211_CMD_DEL_WIPHY);
10112
10113         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10114         if (!msg)
10115                 return;
10116
10117         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
10118                 nlmsg_free(msg);
10119                 return;
10120         }
10121
10122         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10123                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
10124 }
10125
10126 static int nl80211_add_scan_req(struct sk_buff *msg,
10127                                 struct cfg80211_registered_device *rdev)
10128 {
10129         struct cfg80211_scan_request *req = rdev->scan_req;
10130         struct nlattr *nest;
10131         int i;
10132
10133         if (WARN_ON(!req))
10134                 return 0;
10135
10136         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
10137         if (!nest)
10138                 goto nla_put_failure;
10139         for (i = 0; i < req->n_ssids; i++) {
10140                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
10141                         goto nla_put_failure;
10142         }
10143         nla_nest_end(msg, nest);
10144
10145         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10146         if (!nest)
10147                 goto nla_put_failure;
10148         for (i = 0; i < req->n_channels; i++) {
10149                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10150                         goto nla_put_failure;
10151         }
10152         nla_nest_end(msg, nest);
10153
10154         if (req->ie &&
10155             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
10156                 goto nla_put_failure;
10157
10158         if (req->flags &&
10159             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
10160                 goto nla_put_failure;
10161
10162         return 0;
10163  nla_put_failure:
10164         return -ENOBUFS;
10165 }
10166
10167 static int nl80211_send_scan_msg(struct sk_buff *msg,
10168                                  struct cfg80211_registered_device *rdev,
10169                                  struct wireless_dev *wdev,
10170                                  u32 portid, u32 seq, int flags,
10171                                  u32 cmd)
10172 {
10173         void *hdr;
10174
10175         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10176         if (!hdr)
10177                 return -1;
10178
10179         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10180             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10181                                          wdev->netdev->ifindex)) ||
10182             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10183                 goto nla_put_failure;
10184
10185         /* ignore errors and send incomplete event anyway */
10186         nl80211_add_scan_req(msg, rdev);
10187
10188         return genlmsg_end(msg, hdr);
10189
10190  nla_put_failure:
10191         genlmsg_cancel(msg, hdr);
10192         return -EMSGSIZE;
10193 }
10194
10195 static int
10196 nl80211_send_sched_scan_msg(struct sk_buff *msg,
10197                             struct cfg80211_registered_device *rdev,
10198                             struct net_device *netdev,
10199                             u32 portid, u32 seq, int flags, u32 cmd)
10200 {
10201         void *hdr;
10202
10203         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10204         if (!hdr)
10205                 return -1;
10206
10207         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10208             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10209                 goto nla_put_failure;
10210
10211         return genlmsg_end(msg, hdr);
10212
10213  nla_put_failure:
10214         genlmsg_cancel(msg, hdr);
10215         return -EMSGSIZE;
10216 }
10217
10218 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
10219                              struct wireless_dev *wdev)
10220 {
10221         struct sk_buff *msg;
10222
10223         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10224         if (!msg)
10225                 return;
10226
10227         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10228                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
10229                 nlmsg_free(msg);
10230                 return;
10231         }
10232
10233         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10234                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10235 }
10236
10237 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
10238                                        struct wireless_dev *wdev, bool aborted)
10239 {
10240         struct sk_buff *msg;
10241
10242         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10243         if (!msg)
10244                 return NULL;
10245
10246         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10247                                   aborted ? NL80211_CMD_SCAN_ABORTED :
10248                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
10249                 nlmsg_free(msg);
10250                 return NULL;
10251         }
10252
10253         return msg;
10254 }
10255
10256 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
10257                               struct sk_buff *msg)
10258 {
10259         if (!msg)
10260                 return;
10261
10262         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10263                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10264 }
10265
10266 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
10267                                      struct net_device *netdev)
10268 {
10269         struct sk_buff *msg;
10270
10271         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10272         if (!msg)
10273                 return;
10274
10275         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
10276                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
10277                 nlmsg_free(msg);
10278                 return;
10279         }
10280
10281         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10282                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10283 }
10284
10285 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
10286                              struct net_device *netdev, u32 cmd)
10287 {
10288         struct sk_buff *msg;
10289
10290         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10291         if (!msg)
10292                 return;
10293
10294         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
10295                 nlmsg_free(msg);
10296                 return;
10297         }
10298
10299         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10300                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10301 }
10302
10303 /*
10304  * This can happen on global regulatory changes or device specific settings
10305  * based on custom world regulatory domains.
10306  */
10307 void nl80211_send_reg_change_event(struct regulatory_request *request)
10308 {
10309         struct sk_buff *msg;
10310         void *hdr;
10311
10312         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10313         if (!msg)
10314                 return;
10315
10316         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
10317         if (!hdr) {
10318                 nlmsg_free(msg);
10319                 return;
10320         }
10321
10322         /* Userspace can always count this one always being set */
10323         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
10324                 goto nla_put_failure;
10325
10326         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
10327                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10328                                NL80211_REGDOM_TYPE_WORLD))
10329                         goto nla_put_failure;
10330         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
10331                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10332                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
10333                         goto nla_put_failure;
10334         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
10335                    request->intersect) {
10336                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10337                                NL80211_REGDOM_TYPE_INTERSECTION))
10338                         goto nla_put_failure;
10339         } else {
10340                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10341                                NL80211_REGDOM_TYPE_COUNTRY) ||
10342                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
10343                                    request->alpha2))
10344                         goto nla_put_failure;
10345         }
10346
10347         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
10348             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
10349                 goto nla_put_failure;
10350
10351         genlmsg_end(msg, hdr);
10352
10353         rcu_read_lock();
10354         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10355                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10356         rcu_read_unlock();
10357
10358         return;
10359
10360 nla_put_failure:
10361         genlmsg_cancel(msg, hdr);
10362         nlmsg_free(msg);
10363 }
10364
10365 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
10366                                     struct net_device *netdev,
10367                                     const u8 *buf, size_t len,
10368                                     enum nl80211_commands cmd, gfp_t gfp)
10369 {
10370         struct sk_buff *msg;
10371         void *hdr;
10372
10373         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10374         if (!msg)
10375                 return;
10376
10377         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10378         if (!hdr) {
10379                 nlmsg_free(msg);
10380                 return;
10381         }
10382
10383         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10384             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10385             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10386                 goto nla_put_failure;
10387
10388         genlmsg_end(msg, hdr);
10389
10390         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10391                                 NL80211_MCGRP_MLME, gfp);
10392         return;
10393
10394  nla_put_failure:
10395         genlmsg_cancel(msg, hdr);
10396         nlmsg_free(msg);
10397 }
10398
10399 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
10400                           struct net_device *netdev, const u8 *buf,
10401                           size_t len, gfp_t gfp)
10402 {
10403         nl80211_send_mlme_event(rdev, netdev, buf, len,
10404                                 NL80211_CMD_AUTHENTICATE, gfp);
10405 }
10406
10407 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
10408                            struct net_device *netdev, const u8 *buf,
10409                            size_t len, gfp_t gfp)
10410 {
10411         nl80211_send_mlme_event(rdev, netdev, buf, len,
10412                                 NL80211_CMD_ASSOCIATE, gfp);
10413 }
10414
10415 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
10416                          struct net_device *netdev, const u8 *buf,
10417                          size_t len, gfp_t gfp)
10418 {
10419         nl80211_send_mlme_event(rdev, netdev, buf, len,
10420                                 NL80211_CMD_DEAUTHENTICATE, gfp);
10421 }
10422
10423 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
10424                            struct net_device *netdev, const u8 *buf,
10425                            size_t len, gfp_t gfp)
10426 {
10427         nl80211_send_mlme_event(rdev, netdev, buf, len,
10428                                 NL80211_CMD_DISASSOCIATE, gfp);
10429 }
10430
10431 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
10432                                   size_t len)
10433 {
10434         struct wireless_dev *wdev = dev->ieee80211_ptr;
10435         struct wiphy *wiphy = wdev->wiphy;
10436         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10437         const struct ieee80211_mgmt *mgmt = (void *)buf;
10438         u32 cmd;
10439
10440         if (WARN_ON(len < 2))
10441                 return;
10442
10443         if (ieee80211_is_deauth(mgmt->frame_control))
10444                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
10445         else
10446                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
10447
10448         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
10449         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
10450 }
10451 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
10452
10453 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
10454                                       struct net_device *netdev, int cmd,
10455                                       const u8 *addr, gfp_t gfp)
10456 {
10457         struct sk_buff *msg;
10458         void *hdr;
10459
10460         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10461         if (!msg)
10462                 return;
10463
10464         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10465         if (!hdr) {
10466                 nlmsg_free(msg);
10467                 return;
10468         }
10469
10470         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10471             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10472             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
10473             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10474                 goto nla_put_failure;
10475
10476         genlmsg_end(msg, hdr);
10477
10478         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10479                                 NL80211_MCGRP_MLME, gfp);
10480         return;
10481
10482  nla_put_failure:
10483         genlmsg_cancel(msg, hdr);
10484         nlmsg_free(msg);
10485 }
10486
10487 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
10488                                struct net_device *netdev, const u8 *addr,
10489                                gfp_t gfp)
10490 {
10491         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
10492                                   addr, gfp);
10493 }
10494
10495 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
10496                                 struct net_device *netdev, const u8 *addr,
10497                                 gfp_t gfp)
10498 {
10499         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
10500                                   addr, gfp);
10501 }
10502
10503 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
10504                                  struct net_device *netdev, const u8 *bssid,
10505                                  const u8 *req_ie, size_t req_ie_len,
10506                                  const u8 *resp_ie, size_t resp_ie_len,
10507                                  u16 status, gfp_t gfp)
10508 {
10509         struct sk_buff *msg;
10510         void *hdr;
10511
10512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10513         if (!msg)
10514                 return;
10515
10516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10517         if (!hdr) {
10518                 nlmsg_free(msg);
10519                 return;
10520         }
10521
10522         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10523             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10524             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10525             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10526             (req_ie &&
10527              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10528             (resp_ie &&
10529              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10530                 goto nla_put_failure;
10531
10532         genlmsg_end(msg, hdr);
10533
10534         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10535                                 NL80211_MCGRP_MLME, gfp);
10536         return;
10537
10538  nla_put_failure:
10539         genlmsg_cancel(msg, hdr);
10540         nlmsg_free(msg);
10541
10542 }
10543
10544 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10545                          struct net_device *netdev, const u8 *bssid,
10546                          const u8 *req_ie, size_t req_ie_len,
10547                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10548 {
10549         struct sk_buff *msg;
10550         void *hdr;
10551
10552         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10553         if (!msg)
10554                 return;
10555
10556         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10557         if (!hdr) {
10558                 nlmsg_free(msg);
10559                 return;
10560         }
10561
10562         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10563             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10564             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10565             (req_ie &&
10566              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10567             (resp_ie &&
10568              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10569                 goto nla_put_failure;
10570
10571         genlmsg_end(msg, hdr);
10572
10573         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10574                                 NL80211_MCGRP_MLME, gfp);
10575         return;
10576
10577  nla_put_failure:
10578         genlmsg_cancel(msg, hdr);
10579         nlmsg_free(msg);
10580
10581 }
10582
10583 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10584                                struct net_device *netdev, u16 reason,
10585                                const u8 *ie, size_t ie_len, bool from_ap)
10586 {
10587         struct sk_buff *msg;
10588         void *hdr;
10589
10590         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10591         if (!msg)
10592                 return;
10593
10594         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10595         if (!hdr) {
10596                 nlmsg_free(msg);
10597                 return;
10598         }
10599
10600         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10601             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10602             (from_ap && reason &&
10603              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10604             (from_ap &&
10605              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10606             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10607                 goto nla_put_failure;
10608
10609         genlmsg_end(msg, hdr);
10610
10611         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10612                                 NL80211_MCGRP_MLME, GFP_KERNEL);
10613         return;
10614
10615  nla_put_failure:
10616         genlmsg_cancel(msg, hdr);
10617         nlmsg_free(msg);
10618
10619 }
10620
10621 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10622                              struct net_device *netdev, const u8 *bssid,
10623                              gfp_t gfp)
10624 {
10625         struct sk_buff *msg;
10626         void *hdr;
10627
10628         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10629         if (!msg)
10630                 return;
10631
10632         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10633         if (!hdr) {
10634                 nlmsg_free(msg);
10635                 return;
10636         }
10637
10638         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10639             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10640             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10641                 goto nla_put_failure;
10642
10643         genlmsg_end(msg, hdr);
10644
10645         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10646                                 NL80211_MCGRP_MLME, gfp);
10647         return;
10648
10649  nla_put_failure:
10650         genlmsg_cancel(msg, hdr);
10651         nlmsg_free(msg);
10652 }
10653
10654 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10655                                         const u8* ie, u8 ie_len, gfp_t gfp)
10656 {
10657         struct wireless_dev *wdev = dev->ieee80211_ptr;
10658         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
10659         struct sk_buff *msg;
10660         void *hdr;
10661
10662         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10663                 return;
10664
10665         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10666
10667         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10668         if (!msg)
10669                 return;
10670
10671         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10672         if (!hdr) {
10673                 nlmsg_free(msg);
10674                 return;
10675         }
10676
10677         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10678             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10679             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10680             (ie_len && ie &&
10681              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10682                 goto nla_put_failure;
10683
10684         genlmsg_end(msg, hdr);
10685
10686         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10687                                 NL80211_MCGRP_MLME, gfp);
10688         return;
10689
10690  nla_put_failure:
10691         genlmsg_cancel(msg, hdr);
10692         nlmsg_free(msg);
10693 }
10694 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10695
10696 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10697                                  struct net_device *netdev, const u8 *addr,
10698                                  enum nl80211_key_type key_type, int key_id,
10699                                  const u8 *tsc, gfp_t gfp)
10700 {
10701         struct sk_buff *msg;
10702         void *hdr;
10703
10704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10705         if (!msg)
10706                 return;
10707
10708         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10709         if (!hdr) {
10710                 nlmsg_free(msg);
10711                 return;
10712         }
10713
10714         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10715             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10716             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10717             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10718             (key_id != -1 &&
10719              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10720             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10721                 goto nla_put_failure;
10722
10723         genlmsg_end(msg, hdr);
10724
10725         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10726                                 NL80211_MCGRP_MLME, gfp);
10727         return;
10728
10729  nla_put_failure:
10730         genlmsg_cancel(msg, hdr);
10731         nlmsg_free(msg);
10732 }
10733
10734 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10735                                     struct ieee80211_channel *channel_before,
10736                                     struct ieee80211_channel *channel_after)
10737 {
10738         struct sk_buff *msg;
10739         void *hdr;
10740         struct nlattr *nl_freq;
10741
10742         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10743         if (!msg)
10744                 return;
10745
10746         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10747         if (!hdr) {
10748                 nlmsg_free(msg);
10749                 return;
10750         }
10751
10752         /*
10753          * Since we are applying the beacon hint to a wiphy we know its
10754          * wiphy_idx is valid
10755          */
10756         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10757                 goto nla_put_failure;
10758
10759         /* Before */
10760         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10761         if (!nl_freq)
10762                 goto nla_put_failure;
10763         if (nl80211_msg_put_channel(msg, channel_before, false))
10764                 goto nla_put_failure;
10765         nla_nest_end(msg, nl_freq);
10766
10767         /* After */
10768         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10769         if (!nl_freq)
10770                 goto nla_put_failure;
10771         if (nl80211_msg_put_channel(msg, channel_after, false))
10772                 goto nla_put_failure;
10773         nla_nest_end(msg, nl_freq);
10774
10775         genlmsg_end(msg, hdr);
10776
10777         rcu_read_lock();
10778         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10779                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10780         rcu_read_unlock();
10781
10782         return;
10783
10784 nla_put_failure:
10785         genlmsg_cancel(msg, hdr);
10786         nlmsg_free(msg);
10787 }
10788
10789 static void nl80211_send_remain_on_chan_event(
10790         int cmd, struct cfg80211_registered_device *rdev,
10791         struct wireless_dev *wdev, u64 cookie,
10792         struct ieee80211_channel *chan,
10793         unsigned int duration, gfp_t gfp)
10794 {
10795         struct sk_buff *msg;
10796         void *hdr;
10797
10798         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10799         if (!msg)
10800                 return;
10801
10802         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10803         if (!hdr) {
10804                 nlmsg_free(msg);
10805                 return;
10806         }
10807
10808         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10809             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10810                                          wdev->netdev->ifindex)) ||
10811             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10812             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10813             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10814                         NL80211_CHAN_NO_HT) ||
10815             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10816                 goto nla_put_failure;
10817
10818         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10819             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10820                 goto nla_put_failure;
10821
10822         genlmsg_end(msg, hdr);
10823
10824         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10825                                 NL80211_MCGRP_MLME, gfp);
10826         return;
10827
10828  nla_put_failure:
10829         genlmsg_cancel(msg, hdr);
10830         nlmsg_free(msg);
10831 }
10832
10833 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10834                                struct ieee80211_channel *chan,
10835                                unsigned int duration, gfp_t gfp)
10836 {
10837         struct wiphy *wiphy = wdev->wiphy;
10838         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10839
10840         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10841         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10842                                           rdev, wdev, cookie, chan,
10843                                           duration, gfp);
10844 }
10845 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10846
10847 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10848                                         struct ieee80211_channel *chan,
10849                                         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_expired(wdev, cookie, chan);
10855         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10856                                           rdev, wdev, cookie, chan, 0, gfp);
10857 }
10858 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10859
10860 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10861                       struct station_info *sinfo, gfp_t gfp)
10862 {
10863         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10864         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10865         struct sk_buff *msg;
10866
10867         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10868
10869         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10870         if (!msg)
10871                 return;
10872
10873         if (nl80211_send_station(msg, 0, 0, 0,
10874                                  rdev, dev, mac_addr, sinfo) < 0) {
10875                 nlmsg_free(msg);
10876                 return;
10877         }
10878
10879         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10880                                 NL80211_MCGRP_MLME, gfp);
10881 }
10882 EXPORT_SYMBOL(cfg80211_new_sta);
10883
10884 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10885 {
10886         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10887         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10888         struct sk_buff *msg;
10889         void *hdr;
10890
10891         trace_cfg80211_del_sta(dev, mac_addr);
10892
10893         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10894         if (!msg)
10895                 return;
10896
10897         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10898         if (!hdr) {
10899                 nlmsg_free(msg);
10900                 return;
10901         }
10902
10903         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10904             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10905                 goto nla_put_failure;
10906
10907         genlmsg_end(msg, hdr);
10908
10909         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10910                                 NL80211_MCGRP_MLME, gfp);
10911         return;
10912
10913  nla_put_failure:
10914         genlmsg_cancel(msg, hdr);
10915         nlmsg_free(msg);
10916 }
10917 EXPORT_SYMBOL(cfg80211_del_sta);
10918
10919 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10920                           enum nl80211_connect_failed_reason reason,
10921                           gfp_t gfp)
10922 {
10923         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10924         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10925         struct sk_buff *msg;
10926         void *hdr;
10927
10928         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10929         if (!msg)
10930                 return;
10931
10932         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10933         if (!hdr) {
10934                 nlmsg_free(msg);
10935                 return;
10936         }
10937
10938         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10939             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10940             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10941                 goto nla_put_failure;
10942
10943         genlmsg_end(msg, hdr);
10944
10945         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10946                                 NL80211_MCGRP_MLME, gfp);
10947         return;
10948
10949  nla_put_failure:
10950         genlmsg_cancel(msg, hdr);
10951         nlmsg_free(msg);
10952 }
10953 EXPORT_SYMBOL(cfg80211_conn_failed);
10954
10955 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10956                                        const u8 *addr, gfp_t gfp)
10957 {
10958         struct wireless_dev *wdev = dev->ieee80211_ptr;
10959         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
10960         struct sk_buff *msg;
10961         void *hdr;
10962         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10963
10964         if (!nlportid)
10965                 return false;
10966
10967         msg = nlmsg_new(100, gfp);
10968         if (!msg)
10969                 return true;
10970
10971         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10972         if (!hdr) {
10973                 nlmsg_free(msg);
10974                 return true;
10975         }
10976
10977         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10978             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10979             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10980                 goto nla_put_failure;
10981
10982         genlmsg_end(msg, hdr);
10983         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10984         return true;
10985
10986  nla_put_failure:
10987         genlmsg_cancel(msg, hdr);
10988         nlmsg_free(msg);
10989         return true;
10990 }
10991
10992 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10993                                 const u8 *addr, gfp_t gfp)
10994 {
10995         struct wireless_dev *wdev = dev->ieee80211_ptr;
10996         bool ret;
10997
10998         trace_cfg80211_rx_spurious_frame(dev, addr);
10999
11000         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11001                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
11002                 trace_cfg80211_return_bool(false);
11003                 return false;
11004         }
11005         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
11006                                          addr, gfp);
11007         trace_cfg80211_return_bool(ret);
11008         return ret;
11009 }
11010 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
11011
11012 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
11013                                         const u8 *addr, gfp_t gfp)
11014 {
11015         struct wireless_dev *wdev = dev->ieee80211_ptr;
11016         bool ret;
11017
11018         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
11019
11020         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11021                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11022                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
11023                 trace_cfg80211_return_bool(false);
11024                 return false;
11025         }
11026         ret = __nl80211_unexpected_frame(dev,
11027                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
11028                                          addr, gfp);
11029         trace_cfg80211_return_bool(ret);
11030         return ret;
11031 }
11032 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
11033
11034 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
11035                       struct wireless_dev *wdev, u32 nlportid,
11036                       int freq, int sig_dbm,
11037                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
11038 {
11039         struct net_device *netdev = wdev->netdev;
11040         struct sk_buff *msg;
11041         void *hdr;
11042
11043         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11044         if (!msg)
11045                 return -ENOMEM;
11046
11047         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11048         if (!hdr) {
11049                 nlmsg_free(msg);
11050                 return -ENOMEM;
11051         }
11052
11053         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11054             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11055                                         netdev->ifindex)) ||
11056             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11057             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
11058             (sig_dbm &&
11059              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11060             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11061             (flags &&
11062              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
11063                 goto nla_put_failure;
11064
11065         genlmsg_end(msg, hdr);
11066
11067         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11068
11069  nla_put_failure:
11070         genlmsg_cancel(msg, hdr);
11071         nlmsg_free(msg);
11072         return -ENOBUFS;
11073 }
11074
11075 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
11076                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
11077 {
11078         struct wiphy *wiphy = wdev->wiphy;
11079         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11080         struct net_device *netdev = wdev->netdev;
11081         struct sk_buff *msg;
11082         void *hdr;
11083
11084         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
11085
11086         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11087         if (!msg)
11088                 return;
11089
11090         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
11091         if (!hdr) {
11092                 nlmsg_free(msg);
11093                 return;
11094         }
11095
11096         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11097             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11098                                    netdev->ifindex)) ||
11099             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11100             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11101             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11102             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
11103                 goto nla_put_failure;
11104
11105         genlmsg_end(msg, hdr);
11106
11107         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11108                                 NL80211_MCGRP_MLME, gfp);
11109         return;
11110
11111  nla_put_failure:
11112         genlmsg_cancel(msg, hdr);
11113         nlmsg_free(msg);
11114 }
11115 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
11116
11117 void cfg80211_cqm_rssi_notify(struct net_device *dev,
11118                               enum nl80211_cqm_rssi_threshold_event rssi_event,
11119                               gfp_t gfp)
11120 {
11121         struct wireless_dev *wdev = dev->ieee80211_ptr;
11122         struct wiphy *wiphy = wdev->wiphy;
11123         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11124         struct sk_buff *msg;
11125         struct nlattr *pinfoattr;
11126         void *hdr;
11127
11128         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
11129
11130         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11131         if (!msg)
11132                 return;
11133
11134         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11135         if (!hdr) {
11136                 nlmsg_free(msg);
11137                 return;
11138         }
11139
11140         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11141             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
11142                 goto nla_put_failure;
11143
11144         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11145         if (!pinfoattr)
11146                 goto nla_put_failure;
11147
11148         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
11149                         rssi_event))
11150                 goto nla_put_failure;
11151
11152         nla_nest_end(msg, pinfoattr);
11153
11154         genlmsg_end(msg, hdr);
11155
11156         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11157                                 NL80211_MCGRP_MLME, gfp);
11158         return;
11159
11160  nla_put_failure:
11161         genlmsg_cancel(msg, hdr);
11162         nlmsg_free(msg);
11163 }
11164 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
11165
11166 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
11167                                      struct net_device *netdev, const u8 *bssid,
11168                                      const u8 *replay_ctr, gfp_t gfp)
11169 {
11170         struct sk_buff *msg;
11171         struct nlattr *rekey_attr;
11172         void *hdr;
11173
11174         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11175         if (!msg)
11176                 return;
11177
11178         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
11179         if (!hdr) {
11180                 nlmsg_free(msg);
11181                 return;
11182         }
11183
11184         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11185             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11186             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11187                 goto nla_put_failure;
11188
11189         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
11190         if (!rekey_attr)
11191                 goto nla_put_failure;
11192
11193         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
11194                     NL80211_REPLAY_CTR_LEN, replay_ctr))
11195                 goto nla_put_failure;
11196
11197         nla_nest_end(msg, rekey_attr);
11198
11199         genlmsg_end(msg, hdr);
11200
11201         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11202                                 NL80211_MCGRP_MLME, gfp);
11203         return;
11204
11205  nla_put_failure:
11206         genlmsg_cancel(msg, hdr);
11207         nlmsg_free(msg);
11208 }
11209
11210 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
11211                                const u8 *replay_ctr, gfp_t gfp)
11212 {
11213         struct wireless_dev *wdev = dev->ieee80211_ptr;
11214         struct wiphy *wiphy = wdev->wiphy;
11215         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11216
11217         trace_cfg80211_gtk_rekey_notify(dev, bssid);
11218         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
11219 }
11220 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
11221
11222 static void
11223 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
11224                                struct net_device *netdev, int index,
11225                                const u8 *bssid, bool preauth, gfp_t gfp)
11226 {
11227         struct sk_buff *msg;
11228         struct nlattr *attr;
11229         void *hdr;
11230
11231         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11232         if (!msg)
11233                 return;
11234
11235         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
11236         if (!hdr) {
11237                 nlmsg_free(msg);
11238                 return;
11239         }
11240
11241         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11242             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11243                 goto nla_put_failure;
11244
11245         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
11246         if (!attr)
11247                 goto nla_put_failure;
11248
11249         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
11250             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
11251             (preauth &&
11252              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
11253                 goto nla_put_failure;
11254
11255         nla_nest_end(msg, attr);
11256
11257         genlmsg_end(msg, hdr);
11258
11259         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11260                                 NL80211_MCGRP_MLME, gfp);
11261         return;
11262
11263  nla_put_failure:
11264         genlmsg_cancel(msg, hdr);
11265         nlmsg_free(msg);
11266 }
11267
11268 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
11269                                      const u8 *bssid, bool preauth, gfp_t gfp)
11270 {
11271         struct wireless_dev *wdev = dev->ieee80211_ptr;
11272         struct wiphy *wiphy = wdev->wiphy;
11273         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11274
11275         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
11276         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
11277 }
11278 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
11279
11280 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
11281                                      struct net_device *netdev,
11282                                      struct cfg80211_chan_def *chandef,
11283                                      gfp_t gfp)
11284 {
11285         struct sk_buff *msg;
11286         void *hdr;
11287
11288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11289         if (!msg)
11290                 return;
11291
11292         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
11293         if (!hdr) {
11294                 nlmsg_free(msg);
11295                 return;
11296         }
11297
11298         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11299                 goto nla_put_failure;
11300
11301         if (nl80211_send_chandef(msg, chandef))
11302                 goto nla_put_failure;
11303
11304         genlmsg_end(msg, hdr);
11305
11306         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11307                                 NL80211_MCGRP_MLME, gfp);
11308         return;
11309
11310  nla_put_failure:
11311         genlmsg_cancel(msg, hdr);
11312         nlmsg_free(msg);
11313 }
11314
11315 void cfg80211_ch_switch_notify(struct net_device *dev,
11316                                struct cfg80211_chan_def *chandef)
11317 {
11318         struct wireless_dev *wdev = dev->ieee80211_ptr;
11319         struct wiphy *wiphy = wdev->wiphy;
11320         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11321
11322         ASSERT_WDEV_LOCK(wdev);
11323
11324         trace_cfg80211_ch_switch_notify(dev, chandef);
11325
11326         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11327                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11328                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
11329                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11330                 return;
11331
11332         wdev->chandef = *chandef;
11333         wdev->preset_chandef = *chandef;
11334         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
11335 }
11336 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
11337
11338 void cfg80211_cqm_txe_notify(struct net_device *dev,
11339                              const u8 *peer, u32 num_packets,
11340                              u32 rate, u32 intvl, gfp_t gfp)
11341 {
11342         struct wireless_dev *wdev = dev->ieee80211_ptr;
11343         struct wiphy *wiphy = wdev->wiphy;
11344         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11345         struct sk_buff *msg;
11346         struct nlattr *pinfoattr;
11347         void *hdr;
11348
11349         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
11350         if (!msg)
11351                 return;
11352
11353         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11354         if (!hdr) {
11355                 nlmsg_free(msg);
11356                 return;
11357         }
11358
11359         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11360             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11361             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11362                 goto nla_put_failure;
11363
11364         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11365         if (!pinfoattr)
11366                 goto nla_put_failure;
11367
11368         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
11369                 goto nla_put_failure;
11370
11371         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
11372                 goto nla_put_failure;
11373
11374         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
11375                 goto nla_put_failure;
11376
11377         nla_nest_end(msg, pinfoattr);
11378
11379         genlmsg_end(msg, hdr);
11380
11381         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11382                                 NL80211_MCGRP_MLME, gfp);
11383         return;
11384
11385  nla_put_failure:
11386         genlmsg_cancel(msg, hdr);
11387         nlmsg_free(msg);
11388 }
11389 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11390
11391 void
11392 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
11393                      const struct cfg80211_chan_def *chandef,
11394                      enum nl80211_radar_event event,
11395                      struct net_device *netdev, gfp_t gfp)
11396 {
11397         struct sk_buff *msg;
11398         void *hdr;
11399
11400         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11401         if (!msg)
11402                 return;
11403
11404         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
11405         if (!hdr) {
11406                 nlmsg_free(msg);
11407                 return;
11408         }
11409
11410         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
11411                 goto nla_put_failure;
11412
11413         /* NOP and radar events don't need a netdev parameter */
11414         if (netdev) {
11415                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
11416
11417                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11418                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11419                         goto nla_put_failure;
11420         }
11421
11422         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
11423                 goto nla_put_failure;
11424
11425         if (nl80211_send_chandef(msg, chandef))
11426                 goto nla_put_failure;
11427
11428         genlmsg_end(msg, hdr);
11429
11430         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11431                                 NL80211_MCGRP_MLME, gfp);
11432         return;
11433
11434  nla_put_failure:
11435         genlmsg_cancel(msg, hdr);
11436         nlmsg_free(msg);
11437 }
11438
11439 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11440                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11441 {
11442         struct wireless_dev *wdev = dev->ieee80211_ptr;
11443         struct wiphy *wiphy = wdev->wiphy;
11444         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11445         struct sk_buff *msg;
11446         struct nlattr *pinfoattr;
11447         void *hdr;
11448
11449         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11450
11451         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11452         if (!msg)
11453                 return;
11454
11455         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11456         if (!hdr) {
11457                 nlmsg_free(msg);
11458                 return;
11459         }
11460
11461         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11462             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11463             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
11464                 goto nla_put_failure;
11465
11466         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
11467         if (!pinfoattr)
11468                 goto nla_put_failure;
11469
11470         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11471                 goto nla_put_failure;
11472
11473         nla_nest_end(msg, pinfoattr);
11474
11475         genlmsg_end(msg, hdr);
11476
11477         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11478                                 NL80211_MCGRP_MLME, gfp);
11479         return;
11480
11481  nla_put_failure:
11482         genlmsg_cancel(msg, hdr);
11483         nlmsg_free(msg);
11484 }
11485 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11486
11487 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
11488                            u64 cookie, bool acked, gfp_t gfp)
11489 {
11490         struct wireless_dev *wdev = dev->ieee80211_ptr;
11491         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11492         struct sk_buff *msg;
11493         void *hdr;
11494
11495         trace_cfg80211_probe_status(dev, addr, cookie, acked);
11496
11497         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11498
11499         if (!msg)
11500                 return;
11501
11502         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
11503         if (!hdr) {
11504                 nlmsg_free(msg);
11505                 return;
11506         }
11507
11508         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11509             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11510             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11511             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11512             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11513                 goto nla_put_failure;
11514
11515         genlmsg_end(msg, hdr);
11516
11517         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11518                                 NL80211_MCGRP_MLME, gfp);
11519         return;
11520
11521  nla_put_failure:
11522         genlmsg_cancel(msg, hdr);
11523         nlmsg_free(msg);
11524 }
11525 EXPORT_SYMBOL(cfg80211_probe_status);
11526
11527 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11528                                  const u8 *frame, size_t len,
11529                                  int freq, int sig_dbm)
11530 {
11531         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11532         struct sk_buff *msg;
11533         void *hdr;
11534         struct cfg80211_beacon_registration *reg;
11535
11536         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11537
11538         spin_lock_bh(&rdev->beacon_registrations_lock);
11539         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11540                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11541                 if (!msg) {
11542                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11543                         return;
11544                 }
11545
11546                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11547                 if (!hdr)
11548                         goto nla_put_failure;
11549
11550                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11551                     (freq &&
11552                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11553                     (sig_dbm &&
11554                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11555                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11556                         goto nla_put_failure;
11557
11558                 genlmsg_end(msg, hdr);
11559
11560                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11561         }
11562         spin_unlock_bh(&rdev->beacon_registrations_lock);
11563         return;
11564
11565  nla_put_failure:
11566         spin_unlock_bh(&rdev->beacon_registrations_lock);
11567         if (hdr)
11568                 genlmsg_cancel(msg, hdr);
11569         nlmsg_free(msg);
11570 }
11571 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11572
11573 #ifdef CONFIG_PM
11574 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11575                                    struct cfg80211_wowlan_wakeup *wakeup,
11576                                    gfp_t gfp)
11577 {
11578         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11579         struct sk_buff *msg;
11580         void *hdr;
11581         int size = 200;
11582
11583         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11584
11585         if (wakeup)
11586                 size += wakeup->packet_present_len;
11587
11588         msg = nlmsg_new(size, gfp);
11589         if (!msg)
11590                 return;
11591
11592         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11593         if (!hdr)
11594                 goto free_msg;
11595
11596         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11597             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11598                 goto free_msg;
11599
11600         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11601                                         wdev->netdev->ifindex))
11602                 goto free_msg;
11603
11604         if (wakeup) {
11605                 struct nlattr *reasons;
11606
11607                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11608                 if (!reasons)
11609                         goto free_msg;
11610
11611                 if (wakeup->disconnect &&
11612                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11613                         goto free_msg;
11614                 if (wakeup->magic_pkt &&
11615                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11616                         goto free_msg;
11617                 if (wakeup->gtk_rekey_failure &&
11618                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11619                         goto free_msg;
11620                 if (wakeup->eap_identity_req &&
11621                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11622                         goto free_msg;
11623                 if (wakeup->four_way_handshake &&
11624                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11625                         goto free_msg;
11626                 if (wakeup->rfkill_release &&
11627                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11628                         goto free_msg;
11629
11630                 if (wakeup->pattern_idx >= 0 &&
11631                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11632                                 wakeup->pattern_idx))
11633                         goto free_msg;
11634
11635                 if (wakeup->tcp_match &&
11636                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
11637                         goto free_msg;
11638
11639                 if (wakeup->tcp_connlost &&
11640                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
11641                         goto free_msg;
11642
11643                 if (wakeup->tcp_nomoretokens &&
11644                     nla_put_flag(msg,
11645                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
11646                         goto free_msg;
11647
11648                 if (wakeup->packet) {
11649                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11650                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11651
11652                         if (!wakeup->packet_80211) {
11653                                 pkt_attr =
11654                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11655                                 len_attr =
11656                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11657                         }
11658
11659                         if (wakeup->packet_len &&
11660                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11661                                 goto free_msg;
11662
11663                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11664                                     wakeup->packet))
11665                                 goto free_msg;
11666                 }
11667
11668                 nla_nest_end(msg, reasons);
11669         }
11670
11671         genlmsg_end(msg, hdr);
11672
11673         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11674                                 NL80211_MCGRP_MLME, gfp);
11675         return;
11676
11677  free_msg:
11678         nlmsg_free(msg);
11679 }
11680 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11681 #endif
11682
11683 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11684                                 enum nl80211_tdls_operation oper,
11685                                 u16 reason_code, gfp_t gfp)
11686 {
11687         struct wireless_dev *wdev = dev->ieee80211_ptr;
11688         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11689         struct sk_buff *msg;
11690         void *hdr;
11691
11692         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11693                                          reason_code);
11694
11695         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11696         if (!msg)
11697                 return;
11698
11699         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11700         if (!hdr) {
11701                 nlmsg_free(msg);
11702                 return;
11703         }
11704
11705         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11706             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11707             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11708             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11709             (reason_code > 0 &&
11710              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11711                 goto nla_put_failure;
11712
11713         genlmsg_end(msg, hdr);
11714
11715         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11716                                 NL80211_MCGRP_MLME, gfp);
11717         return;
11718
11719  nla_put_failure:
11720         genlmsg_cancel(msg, hdr);
11721         nlmsg_free(msg);
11722 }
11723 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11724
11725 static int nl80211_netlink_notify(struct notifier_block * nb,
11726                                   unsigned long state,
11727                                   void *_notify)
11728 {
11729         struct netlink_notify *notify = _notify;
11730         struct cfg80211_registered_device *rdev;
11731         struct wireless_dev *wdev;
11732         struct cfg80211_beacon_registration *reg, *tmp;
11733
11734         if (state != NETLINK_URELEASE)
11735                 return NOTIFY_DONE;
11736
11737         rcu_read_lock();
11738
11739         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11740                 bool schedule_destroy_work = false;
11741
11742                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
11743                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11744
11745                         if (wdev->owner_nlportid == notify->portid)
11746                                 schedule_destroy_work = true;
11747                 }
11748
11749                 spin_lock_bh(&rdev->beacon_registrations_lock);
11750                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11751                                          list) {
11752                         if (reg->nlportid == notify->portid) {
11753                                 list_del(&reg->list);
11754                                 kfree(reg);
11755                                 break;
11756                         }
11757                 }
11758                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11759
11760                 if (schedule_destroy_work) {
11761                         struct cfg80211_iface_destroy *destroy;
11762
11763                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
11764                         if (destroy) {
11765                                 destroy->nlportid = notify->portid;
11766                                 spin_lock(&rdev->destroy_list_lock);
11767                                 list_add(&destroy->list, &rdev->destroy_list);
11768                                 spin_unlock(&rdev->destroy_list_lock);
11769                                 schedule_work(&rdev->destroy_work);
11770                         }
11771                 }
11772         }
11773
11774         rcu_read_unlock();
11775
11776         return NOTIFY_OK;
11777 }
11778
11779 static struct notifier_block nl80211_netlink_notifier = {
11780         .notifier_call = nl80211_netlink_notify,
11781 };
11782
11783 void cfg80211_ft_event(struct net_device *netdev,
11784                        struct cfg80211_ft_event_params *ft_event)
11785 {
11786         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11787         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11788         struct sk_buff *msg;
11789         void *hdr;
11790
11791         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11792
11793         if (!ft_event->target_ap)
11794                 return;
11795
11796         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11797         if (!msg)
11798                 return;
11799
11800         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11801         if (!hdr)
11802                 goto out;
11803
11804         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11805             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11806             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
11807                 goto out;
11808
11809         if (ft_event->ies &&
11810             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
11811                 goto out;
11812         if (ft_event->ric_ies &&
11813             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11814                     ft_event->ric_ies))
11815                 goto out;
11816
11817         genlmsg_end(msg, hdr);
11818
11819         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11820                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11821         return;
11822  out:
11823         nlmsg_free(msg);
11824 }
11825 EXPORT_SYMBOL(cfg80211_ft_event);
11826
11827 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11828 {
11829         struct cfg80211_registered_device *rdev;
11830         struct sk_buff *msg;
11831         void *hdr;
11832         u32 nlportid;
11833
11834         rdev = wiphy_to_rdev(wdev->wiphy);
11835         if (!rdev->crit_proto_nlportid)
11836                 return;
11837
11838         nlportid = rdev->crit_proto_nlportid;
11839         rdev->crit_proto_nlportid = 0;
11840
11841         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11842         if (!msg)
11843                 return;
11844
11845         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11846         if (!hdr)
11847                 goto nla_put_failure;
11848
11849         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11850             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11851                 goto nla_put_failure;
11852
11853         genlmsg_end(msg, hdr);
11854
11855         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11856         return;
11857
11858  nla_put_failure:
11859         if (hdr)
11860                 genlmsg_cancel(msg, hdr);
11861         nlmsg_free(msg);
11862
11863 }
11864 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11865
11866 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
11867 {
11868         struct wiphy *wiphy = wdev->wiphy;
11869         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11870         struct sk_buff *msg;
11871         void *hdr;
11872
11873         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11874         if (!msg)
11875                 return;
11876
11877         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
11878         if (!hdr)
11879                 goto out;
11880
11881         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11882             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
11883             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11884                 goto out;
11885
11886         genlmsg_end(msg, hdr);
11887
11888         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
11889                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11890         return;
11891  out:
11892         nlmsg_free(msg);
11893 }
11894
11895 /* initialisation/exit functions */
11896
11897 int nl80211_init(void)
11898 {
11899         int err;
11900
11901         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
11902                                                    nl80211_mcgrps);
11903         if (err)
11904                 return err;
11905
11906         err = netlink_register_notifier(&nl80211_netlink_notifier);
11907         if (err)
11908                 goto err_out;
11909
11910         return 0;
11911  err_out:
11912         genl_unregister_family(&nl80211_fam);
11913         return err;
11914 }
11915
11916 void nl80211_exit(void)
11917 {
11918         netlink_unregister_notifier(&nl80211_netlink_notifier);
11919         genl_unregister_family(&nl80211_fam);
11920 }