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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015       Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                             struct genl_info *info);
  37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  38                               struct genl_info *info);
  39
  40 /* the netlink family */
  41 static struct genl_family nl80211_fam = {
  42         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  43         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  44         .hdrsize = 0,                   /* no private header */
  45         .version = 1,                   /* no particular meaning now */
  46         .maxattr = NL80211_ATTR_MAX,
  47         .netnsok = true,
  48         .pre_doit = nl80211_pre_doit,
  49         .post_doit = nl80211_post_doit,
  50 };
  51
  52 /* multicast groups */
  53 enum nl80211_multicast_groups {
  54         NL80211_MCGRP_CONFIG,
  55         NL80211_MCGRP_SCAN,
  56         NL80211_MCGRP_REGULATORY,
  57         NL80211_MCGRP_MLME,
  58         NL80211_MCGRP_VENDOR,
  59         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  60 };
  61
  62 static const struct genl_multicast_group nl80211_mcgrps[] = {
  63         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  64         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  65         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  66         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  67         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  68 #ifdef CONFIG_NL80211_TESTMODE
  69         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  70 #endif
  71 };
  72
  73 /* returns ERR_PTR values */
  74 static struct wireless_dev *
  75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  76 {
  77         struct cfg80211_registered_device *rdev;
  78         struct wireless_dev *result = NULL;
  79         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  80         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  81         u64 wdev_id;
  82         int wiphy_idx = -1;
  83         int ifidx = -1;
  84
  85         ASSERT_RTNL();
  86
  87         if (!have_ifidx && !have_wdev_id)
  88                 return ERR_PTR(-EINVAL);
  89
  90         if (have_ifidx)
  91                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  92         if (have_wdev_id) {
  93                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  94                 wiphy_idx = wdev_id >> 32;
  95         }
  96
  97         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  98                 struct wireless_dev *wdev;
  99
 100                 if (wiphy_net(&rdev->wiphy) != netns)
 101                         continue;
 102
 103                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 104                         continue;
 105
 106                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 107                         if (have_ifidx && wdev->netdev &&
 108                             wdev->netdev->ifindex == ifidx) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 113                                 result = wdev;
 114                                 break;
 115                         }
 116                 }
 117
 118                 if (result)
 119                         break;
 120         }
 121
 122         if (result)
 123                 return result;
 124         return ERR_PTR(-ENODEV);
 125 }
 126
 127 static struct cfg80211_registered_device *
 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 129 {
 130         struct cfg80211_registered_device *rdev = NULL, *tmp;
 131         struct net_device *netdev;
 132
 133         ASSERT_RTNL();
 134
 135         if (!attrs[NL80211_ATTR_WIPHY] &&
 136             !attrs[NL80211_ATTR_IFINDEX] &&
 137             !attrs[NL80211_ATTR_WDEV])
 138                 return ERR_PTR(-EINVAL);
 139
 140         if (attrs[NL80211_ATTR_WIPHY])
 141                 rdev = cfg80211_rdev_by_wiphy_idx(
 142                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 143
 144         if (attrs[NL80211_ATTR_WDEV]) {
 145                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 146                 struct wireless_dev *wdev;
 147                 bool found = false;
 148
 149                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 150                 if (tmp) {
 151                         /* make sure wdev exists */
 152                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 153                                 if (wdev->identifier != (u32)wdev_id)
 154                                         continue;
 155                                 found = true;
 156                                 break;
 157                         }
 158
 159                         if (!found)
 160                                 tmp = NULL;
 161
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164                         rdev = tmp;
 165                 }
 166         }
 167
 168         if (attrs[NL80211_ATTR_IFINDEX]) {
 169                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 170                 netdev = __dev_get_by_index(netns, ifindex);
 171                 if (netdev) {
 172                         if (netdev->ieee80211_ptr)
 173                                 tmp = wiphy_to_rdev(
 174                                         netdev->ieee80211_ptr->wiphy);
 175                         else
 176                                 tmp = NULL;
 177
 178                         /* not wireless device -- return error */
 179                         if (!tmp)
 180                                 return ERR_PTR(-EINVAL);
 181
 182                         /* mismatch -- return error */
 183                         if (rdev && tmp != rdev)
 184                                 return ERR_PTR(-EINVAL);
 185
 186                         rdev = tmp;
 187                 }
 188         }
 189
 190         if (!rdev)
 191                 return ERR_PTR(-ENODEV);
 192
 193         if (netns != wiphy_net(&rdev->wiphy))
 194                 return ERR_PTR(-ENODEV);
 195
 196         return rdev;
 197 }
 198
 199 /*
 200  * This function returns a pointer to the driver
 201  * that the genl_info item that is passed refers to.
 202  *
 203  * The result of this can be a PTR_ERR and hence must
 204  * be checked with IS_ERR() for errors.
 205  */
 206 static struct cfg80211_registered_device *
 207 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 208 {
 209         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 210 }
 211
 212 /* policy for the attributes */
 213 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 214         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 215         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 216                                       .len = 20-1 },
 217         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 218
 219         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 220         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 224
 225         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 226         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 230         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 231
 232         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 235
 236         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 237         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 238
 239         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 240         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 241                                     .len = WLAN_MAX_KEY_LEN },
 242         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 243         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 244         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 245         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 246         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 247
 248         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 249         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 250         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 251                                        .len = IEEE80211_MAX_DATA_LEN },
 252         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 253                                        .len = IEEE80211_MAX_DATA_LEN },
 254         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 255         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 256         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 257         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 258                                                .len = NL80211_MAX_SUPP_RATES },
 259         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 260         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 261         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 262         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 263                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 264         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 265
 266         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 267         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 268
 269         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 270         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 273                                            .len = NL80211_MAX_SUPP_RATES },
 274         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 275
 276         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 277         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 278
 279         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 280
 281         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 282         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 283                               .len = IEEE80211_MAX_DATA_LEN },
 284         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 286
 287         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 288                                 .len = IEEE80211_MAX_SSID_LEN },
 289         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 290         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 291         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 294         [NL80211_ATTR_STA_FLAGS2] = {
 295                 .len = sizeof(struct nl80211_sta_flag_update),
 296         },
 297         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 303         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 304         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 305         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 306                                  .len = WLAN_PMKID_LEN },
 307         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 308         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 309         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 310         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 311                                  .len = IEEE80211_MAX_DATA_LEN },
 312         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 313         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 314         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 315         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 317         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 319         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 320         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 323         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 327         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 328         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 329         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 331         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 332                                          .len = IEEE80211_MAX_DATA_LEN },
 333         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 334                                          .len = IEEE80211_MAX_DATA_LEN },
 335         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 336         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 339         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 346                                       .len = IEEE80211_MAX_DATA_LEN },
 347         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 350                 .len = NL80211_HT_CAPABILITY_LEN
 351         },
 352         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 353         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 354         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 355         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 356         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 357         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 358         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 359         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 360         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 361         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 362         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 363         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 364         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 365         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 366         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 367         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 368         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 369                 .len = NL80211_VHT_CAPABILITY_LEN,
 370         },
 371         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 372         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 373                                   .len = IEEE80211_MAX_DATA_LEN },
 374         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 375         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 376         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 377         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 378         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 383         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 384         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 385         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 387         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 388                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 389         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 390         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 391         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 394         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 395         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 396         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 397         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 398         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 399         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 401         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 402         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 403         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 404 };
 405
 406 /* policy for the key attributes */
 407 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 408         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 409         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 410         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 411         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 412         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 413         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 414         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 415         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 416 };
 417
 418 /* policy for the key default flags */
 419 static const struct nla_policy
 420 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 421         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 422         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 423 };
 424
 425 /* policy for WoWLAN attributes */
 426 static const struct nla_policy
 427 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 428         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 429         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 430         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 431         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 432         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 433         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 435         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 437         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 438 };
 439
 440 static const struct nla_policy
 441 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 442         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 443         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 444         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 445         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 446         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 447         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 448         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 449                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 450         },
 451         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 452                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 453         },
 454         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 455         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 456         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 457 };
 458
 459 /* policy for coalesce rule attributes */
 460 static const struct nla_policy
 461 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 462         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 463         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 464         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 465 };
 466
 467 /* policy for GTK rekey offload attributes */
 468 static const struct nla_policy
 469 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 470         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 471         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 472         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 473 };
 474
 475 static const struct nla_policy
 476 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 477         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 478                                                  .len = IEEE80211_MAX_SSID_LEN },
 479         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 480 };
 481
 482 static const struct nla_policy
 483 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 484         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 485         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 486 };
 487
 488 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 489                                      struct netlink_callback *cb,
 490                                      struct cfg80211_registered_device **rdev,
 491                                      struct wireless_dev **wdev)
 492 {
 493         int err;
 494
 495         rtnl_lock();
 496
 497         if (!cb->args[0]) {
 498                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 499                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 500                                   nl80211_policy);
 501                 if (err)
 502                         goto out_unlock;
 503
 504                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 505                                                    nl80211_fam.attrbuf);
 506                 if (IS_ERR(*wdev)) {
 507                         err = PTR_ERR(*wdev);
 508                         goto out_unlock;
 509                 }
 510                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 511                 /* 0 is the first index - add 1 to parse only once */
 512                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 513                 cb->args[1] = (*wdev)->identifier;
 514         } else {
 515                 /* subtract the 1 again here */
 516                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 517                 struct wireless_dev *tmp;
 518
 519                 if (!wiphy) {
 520                         err = -ENODEV;
 521                         goto out_unlock;
 522                 }
 523                 *rdev = wiphy_to_rdev(wiphy);
 524                 *wdev = NULL;
 525
 526                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 527                         if (tmp->identifier == cb->args[1]) {
 528                                 *wdev = tmp;
 529                                 break;
 530                         }
 531                 }
 532
 533                 if (!*wdev) {
 534                         err = -ENODEV;
 535                         goto out_unlock;
 536                 }
 537         }
 538
 539         return 0;
 540  out_unlock:
 541         rtnl_unlock();
 542         return err;
 543 }
 544
 545 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 546 {
 547         rtnl_unlock();
 548 }
 549
 550 /* IE validation */
 551 static bool is_valid_ie_attr(const struct nlattr *attr)
 552 {
 553         const u8 *pos;
 554         int len;
 555
 556         if (!attr)
 557                 return true;
 558
 559         pos = nla_data(attr);
 560         len = nla_len(attr);
 561
 562         while (len) {
 563                 u8 elemlen;
 564
 565                 if (len < 2)
 566                         return false;
 567                 len -= 2;
 568
 569                 elemlen = pos[1];
 570                 if (elemlen > len)
 571                         return false;
 572
 573                 len -= elemlen;
 574                 pos += 2 + elemlen;
 575         }
 576
 577         return true;
 578 }
 579
 580 /* message building helper */
 581 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 582                                    int flags, u8 cmd)
 583 {
 584         /* since there is no private header just add the generic one */
 585         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 586 }
 587
 588 static int nl80211_msg_put_channel(struct sk_buff *msg,
 589                                    struct ieee80211_channel *chan,
 590                                    bool large)
 591 {
 592         /* Some channels must be completely excluded from the
 593          * list to protect old user-space tools from breaking
 594          */
 595         if (!large && chan->flags &
 596             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 597                 return 0;
 598
 599         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 600                         chan->center_freq))
 601                 goto nla_put_failure;
 602
 603         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 604             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 605                 goto nla_put_failure;
 606         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 607                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 608                         goto nla_put_failure;
 609                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 610                         goto nla_put_failure;
 611         }
 612         if (chan->flags & IEEE80211_CHAN_RADAR) {
 613                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 614                         goto nla_put_failure;
 615                 if (large) {
 616                         u32 time;
 617
 618                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 619
 620                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 621                                         chan->dfs_state))
 622                                 goto nla_put_failure;
 623                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 624                                         time))
 625                                 goto nla_put_failure;
 626                         if (nla_put_u32(msg,
 627                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 628                                         chan->dfs_cac_ms))
 629                                 goto nla_put_failure;
 630                 }
 631         }
 632
 633         if (large) {
 634                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 635                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 636                         goto nla_put_failure;
 637                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 638                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 639                         goto nla_put_failure;
 640                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 641                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 642                         goto nla_put_failure;
 643                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 644                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 645                         goto nla_put_failure;
 646                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 647                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 648                         goto nla_put_failure;
 649                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 650                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 651                         goto nla_put_failure;
 652                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 653                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 654                         goto nla_put_failure;
 655                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 656                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 657                         goto nla_put_failure;
 658         }
 659
 660         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 661                         DBM_TO_MBM(chan->max_power)))
 662                 goto nla_put_failure;
 663
 664         return 0;
 665
 666  nla_put_failure:
 667         return -ENOBUFS;
 668 }
 669
 670 /* netlink command implementations */
 671
 672 struct key_parse {
 673         struct key_params p;
 674         int idx;
 675         int type;
 676         bool def, defmgmt;
 677         bool def_uni, def_multi;
 678 };
 679
 680 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 681 {
 682         struct nlattr *tb[NL80211_KEY_MAX + 1];
 683         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 684                                    nl80211_key_policy);
 685         if (err)
 686                 return err;
 687
 688         k->def = !!tb[NL80211_KEY_DEFAULT];
 689         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 690
 691         if (k->def) {
 692                 k->def_uni = true;
 693                 k->def_multi = true;
 694         }
 695         if (k->defmgmt)
 696                 k->def_multi = true;
 697
 698         if (tb[NL80211_KEY_IDX])
 699                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 700
 701         if (tb[NL80211_KEY_DATA]) {
 702                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 703                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 704         }
 705
 706         if (tb[NL80211_KEY_SEQ]) {
 707                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 708                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 709         }
 710
 711         if (tb[NL80211_KEY_CIPHER])
 712                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 713
 714         if (tb[NL80211_KEY_TYPE]) {
 715                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 716                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 717                         return -EINVAL;
 718         }
 719
 720         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 721                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 722                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 723                                        tb[NL80211_KEY_DEFAULT_TYPES],
 724                                        nl80211_key_default_policy);
 725                 if (err)
 726                         return err;
 727
 728                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 729                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 730         }
 731
 732         return 0;
 733 }
 734
 735 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 736 {
 737         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 738                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 739                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 740         }
 741
 742         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 743                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 744                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 745         }
 746
 747         if (info->attrs[NL80211_ATTR_KEY_IDX])
 748                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 749
 750         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 751                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 752
 753         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 754         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 755
 756         if (k->def) {
 757                 k->def_uni = true;
 758                 k->def_multi = true;
 759         }
 760         if (k->defmgmt)
 761                 k->def_multi = true;
 762
 763         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 764                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 765                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 766                         return -EINVAL;
 767         }
 768
 769         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 770                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 771                 int err = nla_parse_nested(
 772                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 773                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 774                                 nl80211_key_default_policy);
 775                 if (err)
 776                         return err;
 777
 778                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 779                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 780         }
 781
 782         return 0;
 783 }
 784
 785 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 786 {
 787         int err;
 788
 789         memset(k, 0, sizeof(*k));
 790         k->idx = -1;
 791         k->type = -1;
 792
 793         if (info->attrs[NL80211_ATTR_KEY])
 794                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 795         else
 796                 err = nl80211_parse_key_old(info, k);
 797
 798         if (err)
 799                 return err;
 800
 801         if (k->def && k->defmgmt)
 802                 return -EINVAL;
 803
 804         if (k->defmgmt) {
 805                 if (k->def_uni || !k->def_multi)
 806                         return -EINVAL;
 807         }
 808
 809         if (k->idx != -1) {
 810                 if (k->defmgmt) {
 811                         if (k->idx < 4 || k->idx > 5)
 812                                 return -EINVAL;
 813                 } else if (k->def) {
 814                         if (k->idx < 0 || k->idx > 3)
 815                                 return -EINVAL;
 816                 } else {
 817                         if (k->idx < 0 || k->idx > 5)
 818                                 return -EINVAL;
 819                 }
 820         }
 821
 822         return 0;
 823 }
 824
 825 static struct cfg80211_cached_keys *
 826 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 827                        struct nlattr *keys, bool *no_ht)
 828 {
 829         struct key_parse parse;
 830         struct nlattr *key;
 831         struct cfg80211_cached_keys *result;
 832         int rem, err, def = 0;
 833
 834         result = kzalloc(sizeof(*result), GFP_KERNEL);
 835         if (!result)
 836                 return ERR_PTR(-ENOMEM);
 837
 838         result->def = -1;
 839         result->defmgmt = -1;
 840
 841         nla_for_each_nested(key, keys, rem) {
 842                 memset(&parse, 0, sizeof(parse));
 843                 parse.idx = -1;
 844
 845                 err = nl80211_parse_key_new(key, &parse);
 846                 if (err)
 847                         goto error;
 848                 err = -EINVAL;
 849                 if (!parse.p.key)
 850                         goto error;
 851                 if (parse.idx < 0 || parse.idx > 4)
 852                         goto error;
 853                 if (parse.def) {
 854                         if (def)
 855                                 goto error;
 856                         def = 1;
 857                         result->def = parse.idx;
 858                         if (!parse.def_uni || !parse.def_multi)
 859                                 goto error;
 860                 } else if (parse.defmgmt)
 861                         goto error;
 862                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 863                                                      parse.idx, false, NULL);
 864                 if (err)
 865                         goto error;
 866                 result->params[parse.idx].cipher = parse.p.cipher;
 867                 result->params[parse.idx].key_len = parse.p.key_len;
 868                 result->params[parse.idx].key = result->data[parse.idx];
 869                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 870
 871                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 872                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 873                         if (no_ht)
 874                                 *no_ht = true;
 875                 }
 876         }
 877
 878         return result;
 879  error:
 880         kfree(result);
 881         return ERR_PTR(err);
 882 }
 883
 884 static int nl80211_key_allowed(struct wireless_dev *wdev)
 885 {
 886         ASSERT_WDEV_LOCK(wdev);
 887
 888         switch (wdev->iftype) {
 889         case NL80211_IFTYPE_AP:
 890         case NL80211_IFTYPE_AP_VLAN:
 891         case NL80211_IFTYPE_P2P_GO:
 892         case NL80211_IFTYPE_MESH_POINT:
 893                 break;
 894         case NL80211_IFTYPE_ADHOC:
 895         case NL80211_IFTYPE_STATION:
 896         case NL80211_IFTYPE_P2P_CLIENT:
 897                 if (!wdev->current_bss)
 898                         return -ENOLINK;
 899                 break;
 900         case NL80211_IFTYPE_UNSPECIFIED:
 901         case NL80211_IFTYPE_OCB:
 902         case NL80211_IFTYPE_MONITOR:
 903         case NL80211_IFTYPE_P2P_DEVICE:
 904         case NL80211_IFTYPE_WDS:
 905         case NUM_NL80211_IFTYPES:
 906                 return -EINVAL;
 907         }
 908
 909         return 0;
 910 }
 911
 912 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 913                                                         struct nlattr *tb)
 914 {
 915         struct ieee80211_channel *chan;
 916
 917         if (tb == NULL)
 918                 return NULL;
 919         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 920         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 921                 return NULL;
 922         return chan;
 923 }
 924
 925 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 926 {
 927         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 928         int i;
 929
 930         if (!nl_modes)
 931                 goto nla_put_failure;
 932
 933         i = 0;
 934         while (ifmodes) {
 935                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 936                         goto nla_put_failure;
 937                 ifmodes >>= 1;
 938                 i++;
 939         }
 940
 941         nla_nest_end(msg, nl_modes);
 942         return 0;
 943
 944 nla_put_failure:
 945         return -ENOBUFS;
 946 }
 947
 948 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 949                                           struct sk_buff *msg,
 950                                           bool large)
 951 {
 952         struct nlattr *nl_combis;
 953         int i, j;
 954
 955         nl_combis = nla_nest_start(msg,
 956                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 957         if (!nl_combis)
 958                 goto nla_put_failure;
 959
 960         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 961                 const struct ieee80211_iface_combination *c;
 962                 struct nlattr *nl_combi, *nl_limits;
 963
 964                 c = &wiphy->iface_combinations[i];
 965
 966                 nl_combi = nla_nest_start(msg, i + 1);
 967                 if (!nl_combi)
 968                         goto nla_put_failure;
 969
 970                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 971                 if (!nl_limits)
 972                         goto nla_put_failure;
 973
 974                 for (j = 0; j < c->n_limits; j++) {
 975                         struct nlattr *nl_limit;
 976
 977                         nl_limit = nla_nest_start(msg, j + 1);
 978                         if (!nl_limit)
 979                                 goto nla_put_failure;
 980                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 981                                         c->limits[j].max))
 982                                 goto nla_put_failure;
 983                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 984                                                 c->limits[j].types))
 985                                 goto nla_put_failure;
 986                         nla_nest_end(msg, nl_limit);
 987                 }
 988
 989                 nla_nest_end(msg, nl_limits);
 990
 991                 if (c->beacon_int_infra_match &&
 992                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 993                         goto nla_put_failure;
 994                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 995                                 c->num_different_channels) ||
 996                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 997                                 c->max_interfaces))
 998                         goto nla_put_failure;
 999                 if (large &&
1000                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1001                                 c->radar_detect_widths) ||
1002                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1003                                 c->radar_detect_regions)))
1004                         goto nla_put_failure;
1005
1006                 nla_nest_end(msg, nl_combi);
1007         }
1008
1009         nla_nest_end(msg, nl_combis);
1010
1011         return 0;
1012 nla_put_failure:
1013         return -ENOBUFS;
1014 }
1015
1016 #ifdef CONFIG_PM
1017 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1018                                         struct sk_buff *msg)
1019 {
1020         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1021         struct nlattr *nl_tcp;
1022
1023         if (!tcp)
1024                 return 0;
1025
1026         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1027         if (!nl_tcp)
1028                 return -ENOBUFS;
1029
1030         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1031                         tcp->data_payload_max))
1032                 return -ENOBUFS;
1033
1034         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1035                         tcp->data_payload_max))
1036                 return -ENOBUFS;
1037
1038         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1039                 return -ENOBUFS;
1040
1041         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1042                                 sizeof(*tcp->tok), tcp->tok))
1043                 return -ENOBUFS;
1044
1045         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1046                         tcp->data_interval_max))
1047                 return -ENOBUFS;
1048
1049         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1050                         tcp->wake_payload_max))
1051                 return -ENOBUFS;
1052
1053         nla_nest_end(msg, nl_tcp);
1054         return 0;
1055 }
1056
1057 static int nl80211_send_wowlan(struct sk_buff *msg,
1058                                struct cfg80211_registered_device *rdev,
1059                                bool large)
1060 {
1061         struct nlattr *nl_wowlan;
1062
1063         if (!rdev->wiphy.wowlan)
1064                 return 0;
1065
1066         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1067         if (!nl_wowlan)
1068                 return -ENOBUFS;
1069
1070         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1071              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1072             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1073              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1074             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1075              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1076             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1077              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1078             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1079              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1080             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1081              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1082             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1083              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1084             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1085              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1086                 return -ENOBUFS;
1087
1088         if (rdev->wiphy.wowlan->n_patterns) {
1089                 struct nl80211_pattern_support pat = {
1090                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1091                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1092                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1093                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1094                 };
1095
1096                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1097                             sizeof(pat), &pat))
1098                         return -ENOBUFS;
1099         }
1100
1101         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1102             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1103                         rdev->wiphy.wowlan->max_nd_match_sets))
1104                 return -ENOBUFS;
1105
1106         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1107                 return -ENOBUFS;
1108
1109         nla_nest_end(msg, nl_wowlan);
1110
1111         return 0;
1112 }
1113 #endif
1114
1115 static int nl80211_send_coalesce(struct sk_buff *msg,
1116                                  struct cfg80211_registered_device *rdev)
1117 {
1118         struct nl80211_coalesce_rule_support rule;
1119
1120         if (!rdev->wiphy.coalesce)
1121                 return 0;
1122
1123         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1124         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1125         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1126         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1127         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1128         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1129
1130         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1131                 return -ENOBUFS;
1132
1133         return 0;
1134 }
1135
1136 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1137                                       struct ieee80211_supported_band *sband)
1138 {
1139         struct nlattr *nl_rates, *nl_rate;
1140         struct ieee80211_rate *rate;
1141         int i;
1142
1143         /* add HT info */
1144         if (sband->ht_cap.ht_supported &&
1145             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1146                      sizeof(sband->ht_cap.mcs),
1147                      &sband->ht_cap.mcs) ||
1148              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1149                          sband->ht_cap.cap) ||
1150              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1151                         sband->ht_cap.ampdu_factor) ||
1152              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1153                         sband->ht_cap.ampdu_density)))
1154                 return -ENOBUFS;
1155
1156         /* add VHT info */
1157         if (sband->vht_cap.vht_supported &&
1158             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1159                      sizeof(sband->vht_cap.vht_mcs),
1160                      &sband->vht_cap.vht_mcs) ||
1161              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1162                          sband->vht_cap.cap)))
1163                 return -ENOBUFS;
1164
1165         /* add bitrates */
1166         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1167         if (!nl_rates)
1168                 return -ENOBUFS;
1169
1170         for (i = 0; i < sband->n_bitrates; i++) {
1171                 nl_rate = nla_nest_start(msg, i);
1172                 if (!nl_rate)
1173                         return -ENOBUFS;
1174
1175                 rate = &sband->bitrates[i];
1176                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1177                                 rate->bitrate))
1178                         return -ENOBUFS;
1179                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1180                     nla_put_flag(msg,
1181                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1182                         return -ENOBUFS;
1183
1184                 nla_nest_end(msg, nl_rate);
1185         }
1186
1187         nla_nest_end(msg, nl_rates);
1188
1189         return 0;
1190 }
1191
1192 static int
1193 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1194                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1195 {
1196         u16 stypes;
1197         struct nlattr *nl_ftypes, *nl_ifs;
1198         enum nl80211_iftype ift;
1199         int i;
1200
1201         if (!mgmt_stypes)
1202                 return 0;
1203
1204         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1205         if (!nl_ifs)
1206                 return -ENOBUFS;
1207
1208         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1209                 nl_ftypes = nla_nest_start(msg, ift);
1210                 if (!nl_ftypes)
1211                         return -ENOBUFS;
1212                 i = 0;
1213                 stypes = mgmt_stypes[ift].tx;
1214                 while (stypes) {
1215                         if ((stypes & 1) &&
1216                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1217                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1218                                 return -ENOBUFS;
1219                         stypes >>= 1;
1220                         i++;
1221                 }
1222                 nla_nest_end(msg, nl_ftypes);
1223         }
1224
1225         nla_nest_end(msg, nl_ifs);
1226
1227         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1228         if (!nl_ifs)
1229                 return -ENOBUFS;
1230
1231         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1232                 nl_ftypes = nla_nest_start(msg, ift);
1233                 if (!nl_ftypes)
1234                         return -ENOBUFS;
1235                 i = 0;
1236                 stypes = mgmt_stypes[ift].rx;
1237                 while (stypes) {
1238                         if ((stypes & 1) &&
1239                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1240                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1241                                 return -ENOBUFS;
1242                         stypes >>= 1;
1243                         i++;
1244                 }
1245                 nla_nest_end(msg, nl_ftypes);
1246         }
1247         nla_nest_end(msg, nl_ifs);
1248
1249         return 0;
1250 }
1251
1252 struct nl80211_dump_wiphy_state {
1253         s64 filter_wiphy;
1254         long start;
1255         long split_start, band_start, chan_start;
1256         bool split;
1257 };
1258
1259 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1260                               enum nl80211_commands cmd,
1261                               struct sk_buff *msg, u32 portid, u32 seq,
1262                               int flags, struct nl80211_dump_wiphy_state *state)
1263 {
1264         void *hdr;
1265         struct nlattr *nl_bands, *nl_band;
1266         struct nlattr *nl_freqs, *nl_freq;
1267         struct nlattr *nl_cmds;
1268         enum ieee80211_band band;
1269         struct ieee80211_channel *chan;
1270         int i;
1271         const struct ieee80211_txrx_stypes *mgmt_stypes =
1272                                 rdev->wiphy.mgmt_stypes;
1273         u32 features;
1274
1275         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1276         if (!hdr)
1277                 return -ENOBUFS;
1278
1279         if (WARN_ON(!state))
1280                 return -EINVAL;
1281
1282         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1283             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1284                            wiphy_name(&rdev->wiphy)) ||
1285             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1286                         cfg80211_rdev_list_generation))
1287                 goto nla_put_failure;
1288
1289         if (cmd != NL80211_CMD_NEW_WIPHY)
1290                 goto finish;
1291
1292         switch (state->split_start) {
1293         case 0:
1294                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1295                                rdev->wiphy.retry_short) ||
1296                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1297                                rdev->wiphy.retry_long) ||
1298                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1299                                 rdev->wiphy.frag_threshold) ||
1300                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1301                                 rdev->wiphy.rts_threshold) ||
1302                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1303                                rdev->wiphy.coverage_class) ||
1304                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1305                                rdev->wiphy.max_scan_ssids) ||
1306                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1307                                rdev->wiphy.max_sched_scan_ssids) ||
1308                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1309                                 rdev->wiphy.max_scan_ie_len) ||
1310                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1311                                 rdev->wiphy.max_sched_scan_ie_len) ||
1312                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1313                                rdev->wiphy.max_match_sets) ||
1314                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1315                                 rdev->wiphy.max_sched_scan_plans) ||
1316                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1317                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1318                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1319                                 rdev->wiphy.max_sched_scan_plan_iterations))
1320                         goto nla_put_failure;
1321
1322                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1323                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1324                         goto nla_put_failure;
1325                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1326                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1327                         goto nla_put_failure;
1328                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1329                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1330                         goto nla_put_failure;
1331                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1332                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1333                         goto nla_put_failure;
1334                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1335                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1336                         goto nla_put_failure;
1337                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1338                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1339                         goto nla_put_failure;
1340                 state->split_start++;
1341                 if (state->split)
1342                         break;
1343         case 1:
1344                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1345                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1346                             rdev->wiphy.cipher_suites))
1347                         goto nla_put_failure;
1348
1349                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1350                                rdev->wiphy.max_num_pmkids))
1351                         goto nla_put_failure;
1352
1353                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1354                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1355                         goto nla_put_failure;
1356
1357                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1358                                 rdev->wiphy.available_antennas_tx) ||
1359                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1360                                 rdev->wiphy.available_antennas_rx))
1361                         goto nla_put_failure;
1362
1363                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1364                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1365                                 rdev->wiphy.probe_resp_offload))
1366                         goto nla_put_failure;
1367
1368                 if ((rdev->wiphy.available_antennas_tx ||
1369                      rdev->wiphy.available_antennas_rx) &&
1370                     rdev->ops->get_antenna) {
1371                         u32 tx_ant = 0, rx_ant = 0;
1372                         int res;
1373                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1374                         if (!res) {
1375                                 if (nla_put_u32(msg,
1376                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1377                                                 tx_ant) ||
1378                                     nla_put_u32(msg,
1379                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1380                                                 rx_ant))
1381                                         goto nla_put_failure;
1382                         }
1383                 }
1384
1385                 state->split_start++;
1386                 if (state->split)
1387                         break;
1388         case 2:
1389                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1390                                         rdev->wiphy.interface_modes))
1391                                 goto nla_put_failure;
1392                 state->split_start++;
1393                 if (state->split)
1394                         break;
1395         case 3:
1396                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1397                 if (!nl_bands)
1398                         goto nla_put_failure;
1399
1400                 for (band = state->band_start;
1401                      band < IEEE80211_NUM_BANDS; band++) {
1402                         struct ieee80211_supported_band *sband;
1403
1404                         sband = rdev->wiphy.bands[band];
1405
1406                         if (!sband)
1407                                 continue;
1408
1409                         nl_band = nla_nest_start(msg, band);
1410                         if (!nl_band)
1411                                 goto nla_put_failure;
1412
1413                         switch (state->chan_start) {
1414                         case 0:
1415                                 if (nl80211_send_band_rateinfo(msg, sband))
1416                                         goto nla_put_failure;
1417                                 state->chan_start++;
1418                                 if (state->split)
1419                                         break;
1420                         default:
1421                                 /* add frequencies */
1422                                 nl_freqs = nla_nest_start(
1423                                         msg, NL80211_BAND_ATTR_FREQS);
1424                                 if (!nl_freqs)
1425                                         goto nla_put_failure;
1426
1427                                 for (i = state->chan_start - 1;
1428                                      i < sband->n_channels;
1429                                      i++) {
1430                                         nl_freq = nla_nest_start(msg, i);
1431                                         if (!nl_freq)
1432                                                 goto nla_put_failure;
1433
1434                                         chan = &sband->channels[i];
1435
1436                                         if (nl80211_msg_put_channel(
1437                                                         msg, chan,
1438                                                         state->split))
1439                                                 goto nla_put_failure;
1440
1441                                         nla_nest_end(msg, nl_freq);
1442                                         if (state->split)
1443                                                 break;
1444                                 }
1445                                 if (i < sband->n_channels)
1446                                         state->chan_start = i + 2;
1447                                 else
1448                                         state->chan_start = 0;
1449                                 nla_nest_end(msg, nl_freqs);
1450                         }
1451
1452                         nla_nest_end(msg, nl_band);
1453
1454                         if (state->split) {
1455                                 /* start again here */
1456                                 if (state->chan_start)
1457                                         band--;
1458                                 break;
1459                         }
1460                 }
1461                 nla_nest_end(msg, nl_bands);
1462
1463                 if (band < IEEE80211_NUM_BANDS)
1464                         state->band_start = band + 1;
1465                 else
1466                         state->band_start = 0;
1467
1468                 /* if bands & channels are done, continue outside */
1469                 if (state->band_start == 0 && state->chan_start == 0)
1470                         state->split_start++;
1471                 if (state->split)
1472                         break;
1473         case 4:
1474                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1475                 if (!nl_cmds)
1476                         goto nla_put_failure;
1477
1478                 i = 0;
1479 #define CMD(op, n)                                                      \
1480                  do {                                                   \
1481                         if (rdev->ops->op) {                            \
1482                                 i++;                                    \
1483                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1484                                         goto nla_put_failure;           \
1485                         }                                               \
1486                 } while (0)
1487
1488                 CMD(add_virtual_intf, NEW_INTERFACE);
1489                 CMD(change_virtual_intf, SET_INTERFACE);
1490                 CMD(add_key, NEW_KEY);
1491                 CMD(start_ap, START_AP);
1492                 CMD(add_station, NEW_STATION);
1493                 CMD(add_mpath, NEW_MPATH);
1494                 CMD(update_mesh_config, SET_MESH_CONFIG);
1495                 CMD(change_bss, SET_BSS);
1496                 CMD(auth, AUTHENTICATE);
1497                 CMD(assoc, ASSOCIATE);
1498                 CMD(deauth, DEAUTHENTICATE);
1499                 CMD(disassoc, DISASSOCIATE);
1500                 CMD(join_ibss, JOIN_IBSS);
1501                 CMD(join_mesh, JOIN_MESH);
1502                 CMD(set_pmksa, SET_PMKSA);
1503                 CMD(del_pmksa, DEL_PMKSA);
1504                 CMD(flush_pmksa, FLUSH_PMKSA);
1505                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1506                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1507                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1508                 CMD(mgmt_tx, FRAME);
1509                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1510                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1511                         i++;
1512                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1513                                 goto nla_put_failure;
1514                 }
1515                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1516                     rdev->ops->join_mesh) {
1517                         i++;
1518                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1519                                 goto nla_put_failure;
1520                 }
1521                 CMD(set_wds_peer, SET_WDS_PEER);
1522                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1523                         CMD(tdls_mgmt, TDLS_MGMT);
1524                         CMD(tdls_oper, TDLS_OPER);
1525                 }
1526                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1527                         CMD(sched_scan_start, START_SCHED_SCAN);
1528                 CMD(probe_client, PROBE_CLIENT);
1529                 CMD(set_noack_map, SET_NOACK_MAP);
1530                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1531                         i++;
1532                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1533                                 goto nla_put_failure;
1534                 }
1535                 CMD(start_p2p_device, START_P2P_DEVICE);
1536                 CMD(set_mcast_rate, SET_MCAST_RATE);
1537 #ifdef CONFIG_NL80211_TESTMODE
1538                 CMD(testmode_cmd, TESTMODE);
1539 #endif
1540                 if (state->split) {
1541                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1542                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1543                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1544                                 CMD(channel_switch, CHANNEL_SWITCH);
1545                         CMD(set_qos_map, SET_QOS_MAP);
1546                         if (rdev->wiphy.features &
1547                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1548                                 CMD(add_tx_ts, ADD_TX_TS);
1549                 }
1550                 /* add into the if now */
1551 #undef CMD
1552
1553                 if (rdev->ops->connect || rdev->ops->auth) {
1554                         i++;
1555                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1556                                 goto nla_put_failure;
1557                 }
1558
1559                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1560                         i++;
1561                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1562                                 goto nla_put_failure;
1563                 }
1564
1565                 nla_nest_end(msg, nl_cmds);
1566                 state->split_start++;
1567                 if (state->split)
1568                         break;
1569         case 5:
1570                 if (rdev->ops->remain_on_channel &&
1571                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1572                     nla_put_u32(msg,
1573                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1574                                 rdev->wiphy.max_remain_on_channel_duration))
1575                         goto nla_put_failure;
1576
1577                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1578                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1579                         goto nla_put_failure;
1580
1581                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1582                         goto nla_put_failure;
1583                 state->split_start++;
1584                 if (state->split)
1585                         break;
1586         case 6:
1587 #ifdef CONFIG_PM
1588                 if (nl80211_send_wowlan(msg, rdev, state->split))
1589                         goto nla_put_failure;
1590                 state->split_start++;
1591                 if (state->split)
1592                         break;
1593 #else
1594                 state->split_start++;
1595 #endif
1596         case 7:
1597                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1598                                         rdev->wiphy.software_iftypes))
1599                         goto nla_put_failure;
1600
1601                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1602                                                    state->split))
1603                         goto nla_put_failure;
1604
1605                 state->split_start++;
1606                 if (state->split)
1607                         break;
1608         case 8:
1609                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1610                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1611                                 rdev->wiphy.ap_sme_capa))
1612                         goto nla_put_failure;
1613
1614                 features = rdev->wiphy.features;
1615                 /*
1616                  * We can only add the per-channel limit information if the
1617                  * dump is split, otherwise it makes it too big. Therefore
1618                  * only advertise it in that case.
1619                  */
1620                 if (state->split)
1621                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1622                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1623                         goto nla_put_failure;
1624
1625                 if (rdev->wiphy.ht_capa_mod_mask &&
1626                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1627                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1628                             rdev->wiphy.ht_capa_mod_mask))
1629                         goto nla_put_failure;
1630
1631                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1632                     rdev->wiphy.max_acl_mac_addrs &&
1633                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1634                                 rdev->wiphy.max_acl_mac_addrs))
1635                         goto nla_put_failure;
1636
1637                 /*
1638                  * Any information below this point is only available to
1639                  * applications that can deal with it being split. This
1640                  * helps ensure that newly added capabilities don't break
1641                  * older tools by overrunning their buffers.
1642                  *
1643                  * We still increment split_start so that in the split
1644                  * case we'll continue with more data in the next round,
1645                  * but break unconditionally so unsplit data stops here.
1646                  */
1647                 state->split_start++;
1648                 break;
1649         case 9:
1650                 if (rdev->wiphy.extended_capabilities &&
1651                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1652                              rdev->wiphy.extended_capabilities_len,
1653                              rdev->wiphy.extended_capabilities) ||
1654                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1655                              rdev->wiphy.extended_capabilities_len,
1656                              rdev->wiphy.extended_capabilities_mask)))
1657                         goto nla_put_failure;
1658
1659                 if (rdev->wiphy.vht_capa_mod_mask &&
1660                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1661                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1662                             rdev->wiphy.vht_capa_mod_mask))
1663                         goto nla_put_failure;
1664
1665                 state->split_start++;
1666                 break;
1667         case 10:
1668                 if (nl80211_send_coalesce(msg, rdev))
1669                         goto nla_put_failure;
1670
1671                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1672                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1673                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1674                         goto nla_put_failure;
1675
1676                 if (rdev->wiphy.max_ap_assoc_sta &&
1677                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1678                                 rdev->wiphy.max_ap_assoc_sta))
1679                         goto nla_put_failure;
1680
1681                 state->split_start++;
1682                 break;
1683         case 11:
1684                 if (rdev->wiphy.n_vendor_commands) {
1685                         const struct nl80211_vendor_cmd_info *info;
1686                         struct nlattr *nested;
1687
1688                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1689                         if (!nested)
1690                                 goto nla_put_failure;
1691
1692                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1693                                 info = &rdev->wiphy.vendor_commands[i].info;
1694                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1695                                         goto nla_put_failure;
1696                         }
1697                         nla_nest_end(msg, nested);
1698                 }
1699
1700                 if (rdev->wiphy.n_vendor_events) {
1701                         const struct nl80211_vendor_cmd_info *info;
1702                         struct nlattr *nested;
1703
1704                         nested = nla_nest_start(msg,
1705                                                 NL80211_ATTR_VENDOR_EVENTS);
1706                         if (!nested)
1707                                 goto nla_put_failure;
1708
1709                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1710                                 info = &rdev->wiphy.vendor_events[i];
1711                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1712                                         goto nla_put_failure;
1713                         }
1714                         nla_nest_end(msg, nested);
1715                 }
1716                 state->split_start++;
1717                 break;
1718         case 12:
1719                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1720                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1721                                rdev->wiphy.max_num_csa_counters))
1722                         goto nla_put_failure;
1723
1724                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1725                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1726                         goto nla_put_failure;
1727
1728                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1729                             sizeof(rdev->wiphy.ext_features),
1730                             rdev->wiphy.ext_features))
1731                         goto nla_put_failure;
1732
1733                 /* done */
1734                 state->split_start = 0;
1735                 break;
1736         }
1737  finish:
1738         genlmsg_end(msg, hdr);
1739         return 0;
1740
1741  nla_put_failure:
1742         genlmsg_cancel(msg, hdr);
1743         return -EMSGSIZE;
1744 }
1745
1746 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1747                                     struct netlink_callback *cb,
1748                                     struct nl80211_dump_wiphy_state *state)
1749 {
1750         struct nlattr **tb = nl80211_fam.attrbuf;
1751         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1752                               tb, nl80211_fam.maxattr, nl80211_policy);
1753         /* ignore parse errors for backward compatibility */
1754         if (ret)
1755                 return 0;
1756
1757         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1758         if (tb[NL80211_ATTR_WIPHY])
1759                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1760         if (tb[NL80211_ATTR_WDEV])
1761                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1762         if (tb[NL80211_ATTR_IFINDEX]) {
1763                 struct net_device *netdev;
1764                 struct cfg80211_registered_device *rdev;
1765                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1766
1767                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1768                 if (!netdev)
1769                         return -ENODEV;
1770                 if (netdev->ieee80211_ptr) {
1771                         rdev = wiphy_to_rdev(
1772                                 netdev->ieee80211_ptr->wiphy);
1773                         state->filter_wiphy = rdev->wiphy_idx;
1774                 }
1775         }
1776
1777         return 0;
1778 }
1779
1780 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1781 {
1782         int idx = 0, ret;
1783         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1784         struct cfg80211_registered_device *rdev;
1785
1786         rtnl_lock();
1787         if (!state) {
1788                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1789                 if (!state) {
1790                         rtnl_unlock();
1791                         return -ENOMEM;
1792                 }
1793                 state->filter_wiphy = -1;
1794                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1795                 if (ret) {
1796                         kfree(state);
1797                         rtnl_unlock();
1798                         return ret;
1799                 }
1800                 cb->args[0] = (long)state;
1801         }
1802
1803         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1804                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1805                         continue;
1806                 if (++idx <= state->start)
1807                         continue;
1808                 if (state->filter_wiphy != -1 &&
1809                     state->filter_wiphy != rdev->wiphy_idx)
1810                         continue;
1811                 /* attempt to fit multiple wiphy data chunks into the skb */
1812                 do {
1813                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1814                                                  skb,
1815                                                  NETLINK_CB(cb->skb).portid,
1816                                                  cb->nlh->nlmsg_seq,
1817                                                  NLM_F_MULTI, state);
1818                         if (ret < 0) {
1819                                 /*
1820                                  * If sending the wiphy data didn't fit (ENOBUFS
1821                                  * or EMSGSIZE returned), this SKB is still
1822                                  * empty (so it's not too big because another
1823                                  * wiphy dataset is already in the skb) and
1824                                  * we've not tried to adjust the dump allocation
1825                                  * yet ... then adjust the alloc size to be
1826                                  * bigger, and return 1 but with the empty skb.
1827                                  * This results in an empty message being RX'ed
1828                                  * in userspace, but that is ignored.
1829                                  *
1830                                  * We can then retry with the larger buffer.
1831                                  */
1832                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1833                                     !skb->len && !state->split &&
1834                                     cb->min_dump_alloc < 4096) {
1835                                         cb->min_dump_alloc = 4096;
1836                                         state->split_start = 0;
1837                                         rtnl_unlock();
1838                                         return 1;
1839                                 }
1840                                 idx--;
1841                                 break;
1842                         }
1843                 } while (state->split_start > 0);
1844                 break;
1845         }
1846         rtnl_unlock();
1847
1848         state->start = idx;
1849
1850         return skb->len;
1851 }
1852
1853 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1854 {
1855         kfree((void *)cb->args[0]);
1856         return 0;
1857 }
1858
1859 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1860 {
1861         struct sk_buff *msg;
1862         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1863         struct nl80211_dump_wiphy_state state = {};
1864
1865         msg = nlmsg_new(4096, GFP_KERNEL);
1866         if (!msg)
1867                 return -ENOMEM;
1868
1869         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1870                                info->snd_portid, info->snd_seq, 0,
1871                                &state) < 0) {
1872                 nlmsg_free(msg);
1873                 return -ENOBUFS;
1874         }
1875
1876         return genlmsg_reply(msg, info);
1877 }
1878
1879 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1880         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1881         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1882         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1883         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1884         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1885 };
1886
1887 static int parse_txq_params(struct nlattr *tb[],
1888                             struct ieee80211_txq_params *txq_params)
1889 {
1890         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1891             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1892             !tb[NL80211_TXQ_ATTR_AIFS])
1893                 return -EINVAL;
1894
1895         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1896         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1897         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1898         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1899         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1900
1901         if (txq_params->ac >= NL80211_NUM_ACS)
1902                 return -EINVAL;
1903
1904         return 0;
1905 }
1906
1907 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1908 {
1909         /*
1910          * You can only set the channel explicitly for WDS interfaces,
1911          * all others have their channel managed via their respective
1912          * "establish a connection" command (connect, join, ...)
1913          *
1914          * For AP/GO and mesh mode, the channel can be set with the
1915          * channel userspace API, but is only stored and passed to the
1916          * low-level driver when the AP starts or the mesh is joined.
1917          * This is for backward compatibility, userspace can also give
1918          * the channel in the start-ap or join-mesh commands instead.
1919          *
1920          * Monitors are special as they are normally slaved to
1921          * whatever else is going on, so they have their own special
1922          * operation to set the monitor channel if possible.
1923          */
1924         return !wdev ||
1925                 wdev->iftype == NL80211_IFTYPE_AP ||
1926                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1927                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1928                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1929 }
1930
1931 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1932                                  struct genl_info *info,
1933                                  struct cfg80211_chan_def *chandef)
1934 {
1935         u32 control_freq;
1936
1937         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1938                 return -EINVAL;
1939
1940         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1941
1942         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1943         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1944         chandef->center_freq1 = control_freq;
1945         chandef->center_freq2 = 0;
1946
1947         /* Primary channel not allowed */
1948         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1949                 return -EINVAL;
1950
1951         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1952                 enum nl80211_channel_type chantype;
1953
1954                 chantype = nla_get_u32(
1955                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1956
1957                 switch (chantype) {
1958                 case NL80211_CHAN_NO_HT:
1959                 case NL80211_CHAN_HT20:
1960                 case NL80211_CHAN_HT40PLUS:
1961                 case NL80211_CHAN_HT40MINUS:
1962                         cfg80211_chandef_create(chandef, chandef->chan,
1963                                                 chantype);
1964                         break;
1965                 default:
1966                         return -EINVAL;
1967                 }
1968         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1969                 chandef->width =
1970                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1971                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1972                         chandef->center_freq1 =
1973                                 nla_get_u32(
1974                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1975                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1976                         chandef->center_freq2 =
1977                                 nla_get_u32(
1978                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1979         }
1980
1981         if (!cfg80211_chandef_valid(chandef))
1982                 return -EINVAL;
1983
1984         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1985                                      IEEE80211_CHAN_DISABLED))
1986                 return -EINVAL;
1987
1988         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1989              chandef->width == NL80211_CHAN_WIDTH_10) &&
1990             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1991                 return -EINVAL;
1992
1993         return 0;
1994 }
1995
1996 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1997                                  struct net_device *dev,
1998                                  struct genl_info *info)
1999 {
2000         struct cfg80211_chan_def chandef;
2001         int result;
2002         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2003         struct wireless_dev *wdev = NULL;
2004
2005         if (dev)
2006                 wdev = dev->ieee80211_ptr;
2007         if (!nl80211_can_set_dev_channel(wdev))
2008                 return -EOPNOTSUPP;
2009         if (wdev)
2010                 iftype = wdev->iftype;
2011
2012         result = nl80211_parse_chandef(rdev, info, &chandef);
2013         if (result)
2014                 return result;
2015
2016         switch (iftype) {
2017         case NL80211_IFTYPE_AP:
2018         case NL80211_IFTYPE_P2P_GO:
2019                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2020                                                    iftype)) {
2021                         result = -EINVAL;
2022                         break;
2023                 }
2024                 if (wdev->beacon_interval) {
2025                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2026                             !(rdev->wiphy.features &
2027                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2028                                 result = -EBUSY;
2029                                 break;
2030                         }
2031
2032                         /* Only allow dynamic channel width changes */
2033                         if (chandef.chan != wdev->preset_chandef.chan) {
2034                                 result = -EBUSY;
2035                                 break;
2036                         }
2037                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2038                         if (result)
2039                                 break;
2040                 }
2041                 wdev->preset_chandef = chandef;
2042                 result = 0;
2043                 break;
2044         case NL80211_IFTYPE_MESH_POINT:
2045                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2046                 break;
2047         case NL80211_IFTYPE_MONITOR:
2048                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2049                 break;
2050         default:
2051                 result = -EINVAL;
2052         }
2053
2054         return result;
2055 }
2056
2057 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2058 {
2059         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2060         struct net_device *netdev = info->user_ptr[1];
2061
2062         return __nl80211_set_channel(rdev, netdev, info);
2063 }
2064
2065 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2066 {
2067         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2068         struct net_device *dev = info->user_ptr[1];
2069         struct wireless_dev *wdev = dev->ieee80211_ptr;
2070         const u8 *bssid;
2071
2072         if (!info->attrs[NL80211_ATTR_MAC])
2073                 return -EINVAL;
2074
2075         if (netif_running(dev))
2076                 return -EBUSY;
2077
2078         if (!rdev->ops->set_wds_peer)
2079                 return -EOPNOTSUPP;
2080
2081         if (wdev->iftype != NL80211_IFTYPE_WDS)
2082                 return -EOPNOTSUPP;
2083
2084         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2085         return rdev_set_wds_peer(rdev, dev, bssid);
2086 }
2087
2088
2089 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2090 {
2091         struct cfg80211_registered_device *rdev;
2092         struct net_device *netdev = NULL;
2093         struct wireless_dev *wdev;
2094         int result = 0, rem_txq_params = 0;
2095         struct nlattr *nl_txq_params;
2096         u32 changed;
2097         u8 retry_short = 0, retry_long = 0;
2098         u32 frag_threshold = 0, rts_threshold = 0;
2099         u8 coverage_class = 0;
2100
2101         ASSERT_RTNL();
2102
2103         /*
2104          * Try to find the wiphy and netdev. Normally this
2105          * function shouldn't need the netdev, but this is
2106          * done for backward compatibility -- previously
2107          * setting the channel was done per wiphy, but now
2108          * it is per netdev. Previous userland like hostapd
2109          * also passed a netdev to set_wiphy, so that it is
2110          * possible to let that go to the right netdev!
2111          */
2112
2113         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2114                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2115
2116                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2117                 if (netdev && netdev->ieee80211_ptr)
2118                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2119                 else
2120                         netdev = NULL;
2121         }
2122
2123         if (!netdev) {
2124                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2125                                                   info->attrs);
2126                 if (IS_ERR(rdev))
2127                         return PTR_ERR(rdev);
2128                 wdev = NULL;
2129                 netdev = NULL;
2130                 result = 0;
2131         } else
2132                 wdev = netdev->ieee80211_ptr;
2133
2134         /*
2135          * end workaround code, by now the rdev is available
2136          * and locked, and wdev may or may not be NULL.
2137          */
2138
2139         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2140                 result = cfg80211_dev_rename(
2141                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2142
2143         if (result)
2144                 return result;
2145
2146         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2147                 struct ieee80211_txq_params txq_params;
2148                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2149
2150                 if (!rdev->ops->set_txq_params)
2151                         return -EOPNOTSUPP;
2152
2153                 if (!netdev)
2154                         return -EINVAL;
2155
2156                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2157                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2158                         return -EINVAL;
2159
2160                 if (!netif_running(netdev))
2161                         return -ENETDOWN;
2162
2163                 nla_for_each_nested(nl_txq_params,
2164                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2165                                     rem_txq_params) {
2166                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2167                                            nla_data(nl_txq_params),
2168                                            nla_len(nl_txq_params),
2169                                            txq_params_policy);
2170                         if (result)
2171                                 return result;
2172                         result = parse_txq_params(tb, &txq_params);
2173                         if (result)
2174                                 return result;
2175
2176                         result = rdev_set_txq_params(rdev, netdev,
2177                                                      &txq_params);
2178                         if (result)
2179                                 return result;
2180                 }
2181         }
2182
2183         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2184                 result = __nl80211_set_channel(
2185                         rdev,
2186                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2187                         info);
2188                 if (result)
2189                         return result;
2190         }
2191
2192         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2193                 struct wireless_dev *txp_wdev = wdev;
2194                 enum nl80211_tx_power_setting type;
2195                 int idx, mbm = 0;
2196
2197                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2198                         txp_wdev = NULL;
2199
2200                 if (!rdev->ops->set_tx_power)
2201                         return -EOPNOTSUPP;
2202
2203                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2204                 type = nla_get_u32(info->attrs[idx]);
2205
2206                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2207                     (type != NL80211_TX_POWER_AUTOMATIC))
2208                         return -EINVAL;
2209
2210                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2211                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2212                         mbm = nla_get_u32(info->attrs[idx]);
2213                 }
2214
2215                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2216                 if (result)
2217                         return result;
2218         }
2219
2220         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2221             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2222                 u32 tx_ant, rx_ant;
2223                 if ((!rdev->wiphy.available_antennas_tx &&
2224                      !rdev->wiphy.available_antennas_rx) ||
2225                     !rdev->ops->set_antenna)
2226                         return -EOPNOTSUPP;
2227
2228                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2229                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2230
2231                 /* reject antenna configurations which don't match the
2232                  * available antenna masks, except for the "all" mask */
2233                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2234                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2235                         return -EINVAL;
2236
2237                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2238                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2239
2240                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2241                 if (result)
2242                         return result;
2243         }
2244
2245         changed = 0;
2246
2247         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2248                 retry_short = nla_get_u8(
2249                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2250                 if (retry_short == 0)
2251                         return -EINVAL;
2252
2253                 changed |= WIPHY_PARAM_RETRY_SHORT;
2254         }
2255
2256         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2257                 retry_long = nla_get_u8(
2258                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2259                 if (retry_long == 0)
2260                         return -EINVAL;
2261
2262                 changed |= WIPHY_PARAM_RETRY_LONG;
2263         }
2264
2265         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2266                 frag_threshold = nla_get_u32(
2267                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2268                 if (frag_threshold < 256)
2269                         return -EINVAL;
2270
2271                 if (frag_threshold != (u32) -1) {
2272                         /*
2273                          * Fragments (apart from the last one) are required to
2274                          * have even length. Make the fragmentation code
2275                          * simpler by stripping LSB should someone try to use
2276                          * odd threshold value.
2277                          */
2278                         frag_threshold &= ~0x1;
2279                 }
2280                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2281         }
2282
2283         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2284                 rts_threshold = nla_get_u32(
2285                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2286                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2287         }
2288
2289         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2290                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2291                         return -EINVAL;
2292
2293                 coverage_class = nla_get_u8(
2294                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2295                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2296         }
2297
2298         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2299                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2300                         return -EOPNOTSUPP;
2301
2302                 changed |= WIPHY_PARAM_DYN_ACK;
2303         }
2304
2305         if (changed) {
2306                 u8 old_retry_short, old_retry_long;
2307                 u32 old_frag_threshold, old_rts_threshold;
2308                 u8 old_coverage_class;
2309
2310                 if (!rdev->ops->set_wiphy_params)
2311                         return -EOPNOTSUPP;
2312
2313                 old_retry_short = rdev->wiphy.retry_short;
2314                 old_retry_long = rdev->wiphy.retry_long;
2315                 old_frag_threshold = rdev->wiphy.frag_threshold;
2316                 old_rts_threshold = rdev->wiphy.rts_threshold;
2317                 old_coverage_class = rdev->wiphy.coverage_class;
2318
2319                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2320                         rdev->wiphy.retry_short = retry_short;
2321                 if (changed & WIPHY_PARAM_RETRY_LONG)
2322                         rdev->wiphy.retry_long = retry_long;
2323                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2324                         rdev->wiphy.frag_threshold = frag_threshold;
2325                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2326                         rdev->wiphy.rts_threshold = rts_threshold;
2327                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2328                         rdev->wiphy.coverage_class = coverage_class;
2329
2330                 result = rdev_set_wiphy_params(rdev, changed);
2331                 if (result) {
2332                         rdev->wiphy.retry_short = old_retry_short;
2333                         rdev->wiphy.retry_long = old_retry_long;
2334                         rdev->wiphy.frag_threshold = old_frag_threshold;
2335                         rdev->wiphy.rts_threshold = old_rts_threshold;
2336                         rdev->wiphy.coverage_class = old_coverage_class;
2337                         return result;
2338                 }
2339         }
2340         return 0;
2341 }
2342
2343 static inline u64 wdev_id(struct wireless_dev *wdev)
2344 {
2345         return (u64)wdev->identifier |
2346                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2347 }
2348
2349 static int nl80211_send_chandef(struct sk_buff *msg,
2350                                 const struct cfg80211_chan_def *chandef)
2351 {
2352         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2353                 return -EINVAL;
2354
2355         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2356                         chandef->chan->center_freq))
2357                 return -ENOBUFS;
2358         switch (chandef->width) {
2359         case NL80211_CHAN_WIDTH_20_NOHT:
2360         case NL80211_CHAN_WIDTH_20:
2361         case NL80211_CHAN_WIDTH_40:
2362                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2363                                 cfg80211_get_chandef_type(chandef)))
2364                         return -ENOBUFS;
2365                 break;
2366         default:
2367                 break;
2368         }
2369         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2370                 return -ENOBUFS;
2371         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2372                 return -ENOBUFS;
2373         if (chandef->center_freq2 &&
2374             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2375                 return -ENOBUFS;
2376         return 0;
2377 }
2378
2379 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2380                               struct cfg80211_registered_device *rdev,
2381                               struct wireless_dev *wdev, bool removal)
2382 {
2383         struct net_device *dev = wdev->netdev;
2384         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2385         void *hdr;
2386
2387         if (removal)
2388                 cmd = NL80211_CMD_DEL_INTERFACE;
2389
2390         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2391         if (!hdr)
2392                 return -1;
2393
2394         if (dev &&
2395             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2396              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2397                 goto nla_put_failure;
2398
2399         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2400             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2401             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2402             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2403             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2404                         rdev->devlist_generation ^
2405                         (cfg80211_rdev_list_generation << 2)))
2406                 goto nla_put_failure;
2407
2408         if (rdev->ops->get_channel) {
2409                 int ret;
2410                 struct cfg80211_chan_def chandef;
2411
2412                 ret = rdev_get_channel(rdev, wdev, &chandef);
2413                 if (ret == 0) {
2414                         if (nl80211_send_chandef(msg, &chandef))
2415                                 goto nla_put_failure;
2416                 }
2417         }
2418
2419         if (rdev->ops->get_tx_power) {
2420                 int dbm, ret;
2421
2422                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2423                 if (ret == 0 &&
2424                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2425                                 DBM_TO_MBM(dbm)))
2426                         goto nla_put_failure;
2427         }
2428
2429         if (wdev->ssid_len) {
2430                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2431                         goto nla_put_failure;
2432         }
2433
2434         genlmsg_end(msg, hdr);
2435         return 0;
2436
2437  nla_put_failure:
2438         genlmsg_cancel(msg, hdr);
2439         return -EMSGSIZE;
2440 }
2441
2442 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2443 {
2444         int wp_idx = 0;
2445         int if_idx = 0;
2446         int wp_start = cb->args[0];
2447         int if_start = cb->args[1];
2448         struct cfg80211_registered_device *rdev;
2449         struct wireless_dev *wdev;
2450
2451         rtnl_lock();
2452         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2453                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2454                         continue;
2455                 if (wp_idx < wp_start) {
2456                         wp_idx++;
2457                         continue;
2458                 }
2459                 if_idx = 0;
2460
2461                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2462                         if (if_idx < if_start) {
2463                                 if_idx++;
2464                                 continue;
2465                         }
2466                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2467                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2468                                                rdev, wdev, false) < 0) {
2469                                 goto out;
2470                         }
2471                         if_idx++;
2472                 }
2473
2474                 wp_idx++;
2475         }
2476  out:
2477         rtnl_unlock();
2478
2479         cb->args[0] = wp_idx;
2480         cb->args[1] = if_idx;
2481
2482         return skb->len;
2483 }
2484
2485 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2486 {
2487         struct sk_buff *msg;
2488         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2489         struct wireless_dev *wdev = info->user_ptr[1];
2490
2491         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2492         if (!msg)
2493                 return -ENOMEM;
2494
2495         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2496                                rdev, wdev, false) < 0) {
2497                 nlmsg_free(msg);
2498                 return -ENOBUFS;
2499         }
2500
2501         return genlmsg_reply(msg, info);
2502 }
2503
2504 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2505         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2506         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2507         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2508         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2509         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2510         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2511 };
2512
2513 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2514 {
2515         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2516         int flag;
2517
2518         *mntrflags = 0;
2519
2520         if (!nla)
2521                 return -EINVAL;
2522
2523         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2524                              nla, mntr_flags_policy))
2525                 return -EINVAL;
2526
2527         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2528                 if (flags[flag])
2529                         *mntrflags |= (1<<flag);
2530
2531         return 0;
2532 }
2533
2534 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2535                                struct net_device *netdev, u8 use_4addr,
2536                                enum nl80211_iftype iftype)
2537 {
2538         if (!use_4addr) {
2539                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2540                         return -EBUSY;
2541                 return 0;
2542         }
2543
2544         switch (iftype) {
2545         case NL80211_IFTYPE_AP_VLAN:
2546                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2547                         return 0;
2548                 break;
2549         case NL80211_IFTYPE_STATION:
2550                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2551                         return 0;
2552                 break;
2553         default:
2554                 break;
2555         }
2556
2557         return -EOPNOTSUPP;
2558 }
2559
2560 static int nl80211_set_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         int err;
2565         enum nl80211_iftype otype, ntype;
2566         struct net_device *dev = info->user_ptr[1];
2567         u32 _flags, *flags = NULL;
2568         bool change = false;
2569
2570         memset(&params, 0, sizeof(params));
2571
2572         otype = ntype = dev->ieee80211_ptr->iftype;
2573
2574         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2575                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2576                 if (otype != ntype)
2577                         change = true;
2578                 if (ntype > NL80211_IFTYPE_MAX)
2579                         return -EINVAL;
2580         }
2581
2582         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2583                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2584
2585                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2586                         return -EINVAL;
2587                 if (netif_running(dev))
2588                         return -EBUSY;
2589
2590                 wdev_lock(wdev);
2591                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2592                              IEEE80211_MAX_MESH_ID_LEN);
2593                 wdev->mesh_id_up_len =
2594                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2595                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2596                        wdev->mesh_id_up_len);
2597                 wdev_unlock(wdev);
2598         }
2599
2600         if (info->attrs[NL80211_ATTR_4ADDR]) {
2601                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2602                 change = true;
2603                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2604                 if (err)
2605                         return err;
2606         } else {
2607                 params.use_4addr = -1;
2608         }
2609
2610         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2611                 if (ntype != NL80211_IFTYPE_MONITOR)
2612                         return -EINVAL;
2613                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2614                                           &_flags);
2615                 if (err)
2616                         return err;
2617
2618                 flags = &_flags;
2619                 change = true;
2620         }
2621
2622         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2623             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2624                 return -EOPNOTSUPP;
2625
2626         if (change)
2627                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2628         else
2629                 err = 0;
2630
2631         if (!err && params.use_4addr != -1)
2632                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2633
2634         return err;
2635 }
2636
2637 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2638 {
2639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2640         struct vif_params params;
2641         struct wireless_dev *wdev;
2642         struct sk_buff *msg, *event;
2643         int err;
2644         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2645         u32 flags;
2646
2647         /* to avoid failing a new interface creation due to pending removal */
2648         cfg80211_destroy_ifaces(rdev);
2649
2650         memset(&params, 0, sizeof(params));
2651
2652         if (!info->attrs[NL80211_ATTR_IFNAME])
2653                 return -EINVAL;
2654
2655         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2656                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2657                 if (type > NL80211_IFTYPE_MAX)
2658                         return -EINVAL;
2659         }
2660
2661         if (!rdev->ops->add_virtual_intf ||
2662             !(rdev->wiphy.interface_modes & (1 << type)))
2663                 return -EOPNOTSUPP;
2664
2665         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2666              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2667             info->attrs[NL80211_ATTR_MAC]) {
2668                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2669                            ETH_ALEN);
2670                 if (!is_valid_ether_addr(params.macaddr))
2671                         return -EADDRNOTAVAIL;
2672         }
2673
2674         if (info->attrs[NL80211_ATTR_4ADDR]) {
2675                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2676                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2677                 if (err)
2678                         return err;
2679         }
2680
2681         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2682                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2683                                   &flags);
2684
2685         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2686             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2687                 return -EOPNOTSUPP;
2688
2689         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2690         if (!msg)
2691                 return -ENOMEM;
2692
2693         wdev = rdev_add_virtual_intf(rdev,
2694                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2695                                 NET_NAME_USER, type, err ? NULL : &flags,
2696                                 &params);
2697         if (WARN_ON(!wdev)) {
2698                 nlmsg_free(msg);
2699                 return -EPROTO;
2700         } else if (IS_ERR(wdev)) {
2701                 nlmsg_free(msg);
2702                 return PTR_ERR(wdev);
2703         }
2704
2705         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2706                 wdev->owner_nlportid = info->snd_portid;
2707
2708         switch (type) {
2709         case NL80211_IFTYPE_MESH_POINT:
2710                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2711                         break;
2712                 wdev_lock(wdev);
2713                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2714                              IEEE80211_MAX_MESH_ID_LEN);
2715                 wdev->mesh_id_up_len =
2716                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2717                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2718                        wdev->mesh_id_up_len);
2719                 wdev_unlock(wdev);
2720                 break;
2721         case NL80211_IFTYPE_P2P_DEVICE:
2722                 /*
2723                  * P2P Device doesn't have a netdev, so doesn't go
2724                  * through the netdev notifier and must be added here
2725                  */
2726                 mutex_init(&wdev->mtx);
2727                 INIT_LIST_HEAD(&wdev->event_list);
2728                 spin_lock_init(&wdev->event_lock);
2729                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2730                 spin_lock_init(&wdev->mgmt_registrations_lock);
2731
2732                 wdev->identifier = ++rdev->wdev_id;
2733                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2734                 rdev->devlist_generation++;
2735                 break;
2736         default:
2737                 break;
2738         }
2739
2740         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2741                                rdev, wdev, false) < 0) {
2742                 nlmsg_free(msg);
2743                 return -ENOBUFS;
2744         }
2745
2746         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2747         if (event) {
2748                 if (nl80211_send_iface(event, 0, 0, 0,
2749                                        rdev, wdev, false) < 0) {
2750                         nlmsg_free(event);
2751                         goto out;
2752                 }
2753
2754                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2755                                         event, 0, NL80211_MCGRP_CONFIG,
2756                                         GFP_KERNEL);
2757         }
2758
2759 out:
2760         return genlmsg_reply(msg, info);
2761 }
2762
2763 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2764 {
2765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2766         struct wireless_dev *wdev = info->user_ptr[1];
2767         struct sk_buff *msg;
2768         int status;
2769
2770         if (!rdev->ops->del_virtual_intf)
2771                 return -EOPNOTSUPP;
2772
2773         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2774         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2775                 nlmsg_free(msg);
2776                 msg = NULL;
2777         }
2778
2779         /*
2780          * If we remove a wireless device without a netdev then clear
2781          * user_ptr[1] so that nl80211_post_doit won't dereference it
2782          * to check if it needs to do dev_put(). Otherwise it crashes
2783          * since the wdev has been freed, unlike with a netdev where
2784          * we need the dev_put() for the netdev to really be freed.
2785          */
2786         if (!wdev->netdev)
2787                 info->user_ptr[1] = NULL;
2788
2789         status = rdev_del_virtual_intf(rdev, wdev);
2790         if (status >= 0 && msg)
2791                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2792                                         msg, 0, NL80211_MCGRP_CONFIG,
2793                                         GFP_KERNEL);
2794         else
2795                 nlmsg_free(msg);
2796
2797         return status;
2798 }
2799
2800 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2801 {
2802         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2803         struct net_device *dev = info->user_ptr[1];
2804         u16 noack_map;
2805
2806         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2807                 return -EINVAL;
2808
2809         if (!rdev->ops->set_noack_map)
2810                 return -EOPNOTSUPP;
2811
2812         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2813
2814         return rdev_set_noack_map(rdev, dev, noack_map);
2815 }
2816
2817 struct get_key_cookie {
2818         struct sk_buff *msg;
2819         int error;
2820         int idx;
2821 };
2822
2823 static void get_key_callback(void *c, struct key_params *params)
2824 {
2825         struct nlattr *key;
2826         struct get_key_cookie *cookie = c;
2827
2828         if ((params->key &&
2829              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2830                      params->key_len, params->key)) ||
2831             (params->seq &&
2832              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2833                      params->seq_len, params->seq)) ||
2834             (params->cipher &&
2835              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2836                          params->cipher)))
2837                 goto nla_put_failure;
2838
2839         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2840         if (!key)
2841                 goto nla_put_failure;
2842
2843         if ((params->key &&
2844              nla_put(cookie->msg, NL80211_KEY_DATA,
2845                      params->key_len, params->key)) ||
2846             (params->seq &&
2847              nla_put(cookie->msg, NL80211_KEY_SEQ,
2848                      params->seq_len, params->seq)) ||
2849             (params->cipher &&
2850              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2851                          params->cipher)))
2852                 goto nla_put_failure;
2853
2854         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2855                 goto nla_put_failure;
2856
2857         nla_nest_end(cookie->msg, key);
2858
2859         return;
2860  nla_put_failure:
2861         cookie->error = 1;
2862 }
2863
2864 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2865 {
2866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2867         int err;
2868         struct net_device *dev = info->user_ptr[1];
2869         u8 key_idx = 0;
2870         const u8 *mac_addr = NULL;
2871         bool pairwise;
2872         struct get_key_cookie cookie = {
2873                 .error = 0,
2874         };
2875         void *hdr;
2876         struct sk_buff *msg;
2877
2878         if (info->attrs[NL80211_ATTR_KEY_IDX])
2879                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2880
2881         if (key_idx > 5)
2882                 return -EINVAL;
2883
2884         if (info->attrs[NL80211_ATTR_MAC])
2885                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2886
2887         pairwise = !!mac_addr;
2888         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2889                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2890                 if (kt >= NUM_NL80211_KEYTYPES)
2891                         return -EINVAL;
2892                 if (kt != NL80211_KEYTYPE_GROUP &&
2893                     kt != NL80211_KEYTYPE_PAIRWISE)
2894                         return -EINVAL;
2895                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2896         }
2897
2898         if (!rdev->ops->get_key)
2899                 return -EOPNOTSUPP;
2900
2901         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2902                 return -ENOENT;
2903
2904         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2905         if (!msg)
2906                 return -ENOMEM;
2907
2908         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2909                              NL80211_CMD_NEW_KEY);
2910         if (!hdr)
2911                 goto nla_put_failure;
2912
2913         cookie.msg = msg;
2914         cookie.idx = key_idx;
2915
2916         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2917             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2918                 goto nla_put_failure;
2919         if (mac_addr &&
2920             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2921                 goto nla_put_failure;
2922
2923         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2924                            get_key_callback);
2925
2926         if (err)
2927                 goto free_msg;
2928
2929         if (cookie.error)
2930                 goto nla_put_failure;
2931
2932         genlmsg_end(msg, hdr);
2933         return genlmsg_reply(msg, info);
2934
2935  nla_put_failure:
2936         err = -ENOBUFS;
2937  free_msg:
2938         nlmsg_free(msg);
2939         return err;
2940 }
2941
2942 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2943 {
2944         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2945         struct key_parse key;
2946         int err;
2947         struct net_device *dev = info->user_ptr[1];
2948
2949         err = nl80211_parse_key(info, &key);
2950         if (err)
2951                 return err;
2952
2953         if (key.idx < 0)
2954                 return -EINVAL;
2955
2956         /* only support setting default key */
2957         if (!key.def && !key.defmgmt)
2958                 return -EINVAL;
2959
2960         wdev_lock(dev->ieee80211_ptr);
2961
2962         if (key.def) {
2963                 if (!rdev->ops->set_default_key) {
2964                         err = -EOPNOTSUPP;
2965                         goto out;
2966                 }
2967
2968                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2969                 if (err)
2970                         goto out;
2971
2972                 err = rdev_set_default_key(rdev, dev, key.idx,
2973                                                  key.def_uni, key.def_multi);
2974
2975                 if (err)
2976                         goto out;
2977
2978 #ifdef CONFIG_CFG80211_WEXT
2979                 dev->ieee80211_ptr->wext.default_key = key.idx;
2980 #endif
2981         } else {
2982                 if (key.def_uni || !key.def_multi) {
2983                         err = -EINVAL;
2984                         goto out;
2985                 }
2986
2987                 if (!rdev->ops->set_default_mgmt_key) {
2988                         err = -EOPNOTSUPP;
2989                         goto out;
2990                 }
2991
2992                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2993                 if (err)
2994                         goto out;
2995
2996                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2997                 if (err)
2998                         goto out;
2999
3000 #ifdef CONFIG_CFG80211_WEXT
3001                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3002 #endif
3003         }
3004
3005  out:
3006         wdev_unlock(dev->ieee80211_ptr);
3007
3008         return err;
3009 }
3010
3011 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3012 {
3013         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3014         int err;
3015         struct net_device *dev = info->user_ptr[1];
3016         struct key_parse key;
3017         const u8 *mac_addr = NULL;
3018
3019         err = nl80211_parse_key(info, &key);
3020         if (err)
3021                 return err;
3022
3023         if (!key.p.key)
3024                 return -EINVAL;
3025
3026         if (info->attrs[NL80211_ATTR_MAC])
3027                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3028
3029         if (key.type == -1) {
3030                 if (mac_addr)
3031                         key.type = NL80211_KEYTYPE_PAIRWISE;
3032                 else
3033                         key.type = NL80211_KEYTYPE_GROUP;
3034         }
3035
3036         /* for now */
3037         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3038             key.type != NL80211_KEYTYPE_GROUP)
3039                 return -EINVAL;
3040
3041         if (!rdev->ops->add_key)
3042                 return -EOPNOTSUPP;
3043
3044         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3045                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3046                                            mac_addr))
3047                 return -EINVAL;
3048
3049         wdev_lock(dev->ieee80211_ptr);
3050         err = nl80211_key_allowed(dev->ieee80211_ptr);
3051         if (!err)
3052                 err = rdev_add_key(rdev, dev, key.idx,
3053                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3054                                     mac_addr, &key.p);
3055         wdev_unlock(dev->ieee80211_ptr);
3056
3057         return err;
3058 }
3059
3060 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3061 {
3062         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3063         int err;
3064         struct net_device *dev = info->user_ptr[1];
3065         u8 *mac_addr = NULL;
3066         struct key_parse key;
3067
3068         err = nl80211_parse_key(info, &key);
3069         if (err)
3070                 return err;
3071
3072         if (info->attrs[NL80211_ATTR_MAC])
3073                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3074
3075         if (key.type == -1) {
3076                 if (mac_addr)
3077                         key.type = NL80211_KEYTYPE_PAIRWISE;
3078                 else
3079                         key.type = NL80211_KEYTYPE_GROUP;
3080         }
3081
3082         /* for now */
3083         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3084             key.type != NL80211_KEYTYPE_GROUP)
3085                 return -EINVAL;
3086
3087         if (!rdev->ops->del_key)
3088                 return -EOPNOTSUPP;
3089
3090         wdev_lock(dev->ieee80211_ptr);
3091         err = nl80211_key_allowed(dev->ieee80211_ptr);
3092
3093         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3094             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3095                 err = -ENOENT;
3096
3097         if (!err)
3098                 err = rdev_del_key(rdev, dev, key.idx,
3099                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3100                                    mac_addr);
3101
3102 #ifdef CONFIG_CFG80211_WEXT
3103         if (!err) {
3104                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3105                         dev->ieee80211_ptr->wext.default_key = -1;
3106                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3107                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3108         }
3109 #endif
3110         wdev_unlock(dev->ieee80211_ptr);
3111
3112         return err;
3113 }
3114
3115 /* This function returns an error or the number of nested attributes */
3116 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3117 {
3118         struct nlattr *attr;
3119         int n_entries = 0, tmp;
3120
3121         nla_for_each_nested(attr, nl_attr, tmp) {
3122                 if (nla_len(attr) != ETH_ALEN)
3123                         return -EINVAL;
3124
3125                 n_entries++;
3126         }
3127
3128         return n_entries;
3129 }
3130
3131 /*
3132  * This function parses ACL information and allocates memory for ACL data.
3133  * On successful return, the calling function is responsible to free the
3134  * ACL buffer returned by this function.
3135  */
3136 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3137                                                 struct genl_info *info)
3138 {
3139         enum nl80211_acl_policy acl_policy;
3140         struct nlattr *attr;
3141         struct cfg80211_acl_data *acl;
3142         int i = 0, n_entries, tmp;
3143
3144         if (!wiphy->max_acl_mac_addrs)
3145                 return ERR_PTR(-EOPNOTSUPP);
3146
3147         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3148                 return ERR_PTR(-EINVAL);
3149
3150         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3151         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3152             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3153                 return ERR_PTR(-EINVAL);
3154
3155         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3156                 return ERR_PTR(-EINVAL);
3157
3158         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3159         if (n_entries < 0)
3160                 return ERR_PTR(n_entries);
3161
3162         if (n_entries > wiphy->max_acl_mac_addrs)
3163                 return ERR_PTR(-ENOTSUPP);
3164
3165         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3166                       GFP_KERNEL);
3167         if (!acl)
3168                 return ERR_PTR(-ENOMEM);
3169
3170         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3171                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3172                 i++;
3173         }
3174
3175         acl->n_acl_entries = n_entries;
3176         acl->acl_policy = acl_policy;
3177
3178         return acl;
3179 }
3180
3181 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3182 {
3183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3184         struct net_device *dev = info->user_ptr[1];
3185         struct cfg80211_acl_data *acl;
3186         int err;
3187
3188         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3189             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3190                 return -EOPNOTSUPP;
3191
3192         if (!dev->ieee80211_ptr->beacon_interval)
3193                 return -EINVAL;
3194
3195         acl = parse_acl_data(&rdev->wiphy, info);
3196         if (IS_ERR(acl))
3197                 return PTR_ERR(acl);
3198
3199         err = rdev_set_mac_acl(rdev, dev, acl);
3200
3201         kfree(acl);
3202
3203         return err;
3204 }
3205
3206 static int nl80211_parse_beacon(struct nlattr *attrs[],
3207                                 struct cfg80211_beacon_data *bcn)
3208 {
3209         bool haveinfo = false;
3210
3211         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3212             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3213             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3214             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3215                 return -EINVAL;
3216
3217         memset(bcn, 0, sizeof(*bcn));
3218
3219         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3220                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3221                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3222                 if (!bcn->head_len)
3223                         return -EINVAL;
3224                 haveinfo = true;
3225         }
3226
3227         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3228                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3229                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3230                 haveinfo = true;
3231         }
3232
3233         if (!haveinfo)
3234                 return -EINVAL;
3235
3236         if (attrs[NL80211_ATTR_IE]) {
3237                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3238                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3239         }
3240
3241         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3242                 bcn->proberesp_ies =
3243                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3244                 bcn->proberesp_ies_len =
3245                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3246         }
3247
3248         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3249                 bcn->assocresp_ies =
3250                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3251                 bcn->assocresp_ies_len =
3252                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3253         }
3254
3255         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3256                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3257                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3258         }
3259
3260         return 0;
3261 }
3262
3263 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3264                                    struct cfg80211_ap_settings *params)
3265 {
3266         struct wireless_dev *wdev;
3267         bool ret = false;
3268
3269         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3270                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3271                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3272                         continue;
3273
3274                 if (!wdev->preset_chandef.chan)
3275                         continue;
3276
3277                 params->chandef = wdev->preset_chandef;
3278                 ret = true;
3279                 break;
3280         }
3281
3282         return ret;
3283 }
3284
3285 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3286                                     enum nl80211_auth_type auth_type,
3287                                     enum nl80211_commands cmd)
3288 {
3289         if (auth_type > NL80211_AUTHTYPE_MAX)
3290                 return false;
3291
3292         switch (cmd) {
3293         case NL80211_CMD_AUTHENTICATE:
3294                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3295                     auth_type == NL80211_AUTHTYPE_SAE)
3296                         return false;
3297                 return true;
3298         case NL80211_CMD_CONNECT:
3299         case NL80211_CMD_START_AP:
3300                 /* SAE not supported yet */
3301                 if (auth_type == NL80211_AUTHTYPE_SAE)
3302                         return false;
3303                 return true;
3304         default:
3305                 return false;
3306         }
3307 }
3308
3309 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3310 {
3311         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3312         struct net_device *dev = info->user_ptr[1];
3313         struct wireless_dev *wdev = dev->ieee80211_ptr;
3314         struct cfg80211_ap_settings params;
3315         int err;
3316
3317         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3318             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3319                 return -EOPNOTSUPP;
3320
3321         if (!rdev->ops->start_ap)
3322                 return -EOPNOTSUPP;
3323
3324         if (wdev->beacon_interval)
3325                 return -EALREADY;
3326
3327         memset(&params, 0, sizeof(params));
3328
3329         /* these are required for START_AP */
3330         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3331             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3332             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3333                 return -EINVAL;
3334
3335         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3336         if (err)
3337                 return err;
3338
3339         params.beacon_interval =
3340                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3341         params.dtim_period =
3342                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3343
3344         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3345         if (err)
3346                 return err;
3347
3348         /*
3349          * In theory, some of these attributes should be required here
3350          * but since they were not used when the command was originally
3351          * added, keep them optional for old user space programs to let
3352          * them continue to work with drivers that do not need the
3353          * additional information -- drivers must check!
3354          */
3355         if (info->attrs[NL80211_ATTR_SSID]) {
3356                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3357                 params.ssid_len =
3358                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3359                 if (params.ssid_len == 0 ||
3360                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3361                         return -EINVAL;
3362         }
3363
3364         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3365                 params.hidden_ssid = nla_get_u32(
3366                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3367                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3368                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3369                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3370                         return -EINVAL;
3371         }
3372
3373         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3374
3375         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3376                 params.auth_type = nla_get_u32(
3377                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3378                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3379                                              NL80211_CMD_START_AP))
3380                         return -EINVAL;
3381         } else
3382                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3383
3384         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3385                                       NL80211_MAX_NR_CIPHER_SUITES);
3386         if (err)
3387                 return err;
3388
3389         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3390                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3391                         return -EOPNOTSUPP;
3392                 params.inactivity_timeout = nla_get_u16(
3393                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3394         }
3395
3396         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3397                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3398                         return -EINVAL;
3399                 params.p2p_ctwindow =
3400                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3401                 if (params.p2p_ctwindow > 127)
3402                         return -EINVAL;
3403                 if (params.p2p_ctwindow != 0 &&
3404                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3405                         return -EINVAL;
3406         }
3407
3408         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3409                 u8 tmp;
3410
3411                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3412                         return -EINVAL;
3413                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3414                 if (tmp > 1)
3415                         return -EINVAL;
3416                 params.p2p_opp_ps = tmp;
3417                 if (params.p2p_opp_ps != 0 &&
3418                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3419                         return -EINVAL;
3420         }
3421
3422         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3423                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3424                 if (err)
3425                         return err;
3426         } else if (wdev->preset_chandef.chan) {
3427                 params.chandef = wdev->preset_chandef;
3428         } else if (!nl80211_get_ap_channel(rdev, &params))
3429                 return -EINVAL;
3430
3431         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3432                                            wdev->iftype))
3433                 return -EINVAL;
3434
3435         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3436                 params.smps_mode =
3437                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3438                 switch (params.smps_mode) {
3439                 case NL80211_SMPS_OFF:
3440                         break;
3441                 case NL80211_SMPS_STATIC:
3442                         if (!(rdev->wiphy.features &
3443                               NL80211_FEATURE_STATIC_SMPS))
3444                                 return -EINVAL;
3445                         break;
3446                 case NL80211_SMPS_DYNAMIC:
3447                         if (!(rdev->wiphy.features &
3448                               NL80211_FEATURE_DYNAMIC_SMPS))
3449                                 return -EINVAL;
3450                         break;
3451                 default:
3452                         return -EINVAL;
3453                 }
3454         } else {
3455                 params.smps_mode = NL80211_SMPS_OFF;
3456         }
3457
3458         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3459                 params.acl = parse_acl_data(&rdev->wiphy, info);
3460                 if (IS_ERR(params.acl))
3461                         return PTR_ERR(params.acl);
3462         }
3463
3464         wdev_lock(wdev);
3465         err = rdev_start_ap(rdev, dev, &params);
3466         if (!err) {
3467                 wdev->preset_chandef = params.chandef;
3468                 wdev->beacon_interval = params.beacon_interval;
3469                 wdev->chandef = params.chandef;
3470                 wdev->ssid_len = params.ssid_len;
3471                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3472         }
3473         wdev_unlock(wdev);
3474
3475         kfree(params.acl);
3476
3477         return err;
3478 }
3479
3480 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3481 {
3482         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3483         struct net_device *dev = info->user_ptr[1];
3484         struct wireless_dev *wdev = dev->ieee80211_ptr;
3485         struct cfg80211_beacon_data params;
3486         int err;
3487
3488         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3489             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3490                 return -EOPNOTSUPP;
3491
3492         if (!rdev->ops->change_beacon)
3493                 return -EOPNOTSUPP;
3494
3495         if (!wdev->beacon_interval)
3496                 return -EINVAL;
3497
3498         err = nl80211_parse_beacon(info->attrs, &params);
3499         if (err)
3500                 return err;
3501
3502         wdev_lock(wdev);
3503         err = rdev_change_beacon(rdev, dev, &params);
3504         wdev_unlock(wdev);
3505
3506         return err;
3507 }
3508
3509 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3510 {
3511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3512         struct net_device *dev = info->user_ptr[1];
3513
3514         return cfg80211_stop_ap(rdev, dev, false);
3515 }
3516
3517 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3518         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3519         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3520         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3521         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3522         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3523         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3524 };
3525
3526 static int parse_station_flags(struct genl_info *info,
3527                                enum nl80211_iftype iftype,
3528                                struct station_parameters *params)
3529 {
3530         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3531         struct nlattr *nla;
3532         int flag;
3533
3534         /*
3535          * Try parsing the new attribute first so userspace
3536          * can specify both for older kernels.
3537          */
3538         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3539         if (nla) {
3540                 struct nl80211_sta_flag_update *sta_flags;
3541
3542                 sta_flags = nla_data(nla);
3543                 params->sta_flags_mask = sta_flags->mask;
3544                 params->sta_flags_set = sta_flags->set;
3545                 params->sta_flags_set &= params->sta_flags_mask;
3546                 if ((params->sta_flags_mask |
3547                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3548                         return -EINVAL;
3549                 return 0;
3550         }
3551
3552         /* if present, parse the old attribute */
3553
3554         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3555         if (!nla)
3556                 return 0;
3557
3558         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3559                              nla, sta_flags_policy))
3560                 return -EINVAL;
3561
3562         /*
3563          * Only allow certain flags for interface types so that
3564          * other attributes are silently ignored. Remember that
3565          * this is backward compatibility code with old userspace
3566          * and shouldn't be hit in other cases anyway.
3567          */
3568         switch (iftype) {
3569         case NL80211_IFTYPE_AP:
3570         case NL80211_IFTYPE_AP_VLAN:
3571         case NL80211_IFTYPE_P2P_GO:
3572                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3573                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3574                                          BIT(NL80211_STA_FLAG_WME) |
3575                                          BIT(NL80211_STA_FLAG_MFP);
3576                 break;
3577         case NL80211_IFTYPE_P2P_CLIENT:
3578         case NL80211_IFTYPE_STATION:
3579                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3580                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3581                 break;
3582         case NL80211_IFTYPE_MESH_POINT:
3583                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3584                                          BIT(NL80211_STA_FLAG_MFP) |
3585                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3586         default:
3587                 return -EINVAL;
3588         }
3589
3590         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3591                 if (flags[flag]) {
3592                         params->sta_flags_set |= (1<<flag);
3593
3594                         /* no longer support new API additions in old API */
3595                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3596                                 return -EINVAL;
3597                 }
3598         }
3599
3600         return 0;
3601 }
3602
3603 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3604                                  int attr)
3605 {
3606         struct nlattr *rate;
3607         u32 bitrate;
3608         u16 bitrate_compat;
3609         enum nl80211_attrs rate_flg;
3610
3611         rate = nla_nest_start(msg, attr);
3612         if (!rate)
3613                 return false;
3614
3615         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3616         bitrate = cfg80211_calculate_bitrate(info);
3617         /* report 16-bit bitrate only if we can */
3618         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3619         if (bitrate > 0 &&
3620             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3621                 return false;
3622         if (bitrate_compat > 0 &&
3623             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3624                 return false;
3625
3626         switch (info->bw) {
3627         case RATE_INFO_BW_5:
3628                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3629                 break;
3630         case RATE_INFO_BW_10:
3631                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3632                 break;
3633         default:
3634                 WARN_ON(1);
3635                 /* fall through */
3636         case RATE_INFO_BW_20:
3637                 rate_flg = 0;
3638                 break;
3639         case RATE_INFO_BW_40:
3640                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3641                 break;
3642         case RATE_INFO_BW_80:
3643                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3644                 break;
3645         case RATE_INFO_BW_160:
3646                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3647                 break;
3648         }
3649
3650         if (rate_flg && nla_put_flag(msg, rate_flg))
3651                 return false;
3652
3653         if (info->flags & RATE_INFO_FLAGS_MCS) {
3654                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3655                         return false;
3656                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3657                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3658                         return false;
3659         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3660                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3661                         return false;
3662                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3663                         return false;
3664                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3665                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3666                         return false;
3667         }
3668
3669         nla_nest_end(msg, rate);
3670         return true;
3671 }
3672
3673 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3674                                int id)
3675 {
3676         void *attr;
3677         int i = 0;
3678
3679         if (!mask)
3680                 return true;
3681
3682         attr = nla_nest_start(msg, id);
3683         if (!attr)
3684                 return false;
3685
3686         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3687                 if (!(mask & BIT(i)))
3688                         continue;
3689
3690                 if (nla_put_u8(msg, i, signal[i]))
3691                         return false;
3692         }
3693
3694         nla_nest_end(msg, attr);
3695
3696         return true;
3697 }
3698
3699 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3700                                 u32 seq, int flags,
3701                                 struct cfg80211_registered_device *rdev,
3702                                 struct net_device *dev,
3703                                 const u8 *mac_addr, struct station_info *sinfo)
3704 {
3705         void *hdr;
3706         struct nlattr *sinfoattr, *bss_param;
3707
3708         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3709         if (!hdr)
3710                 return -1;
3711
3712         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3713             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3714             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3715                 goto nla_put_failure;
3716
3717         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3718         if (!sinfoattr)
3719                 goto nla_put_failure;
3720
3721 #define PUT_SINFO(attr, memb, type) do {                                \
3722         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3723             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3724                              sinfo->memb))                              \
3725                 goto nla_put_failure;                                   \
3726         } while (0)
3727
3728         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3729         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3730
3731         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3732                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3733             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3734                         (u32)sinfo->rx_bytes))
3735                 goto nla_put_failure;
3736
3737         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3738                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3739             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3740                         (u32)sinfo->tx_bytes))
3741                 goto nla_put_failure;
3742
3743         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3744         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3745         PUT_SINFO(LLID, llid, u16);
3746         PUT_SINFO(PLID, plid, u16);
3747         PUT_SINFO(PLINK_STATE, plink_state, u8);
3748
3749         switch (rdev->wiphy.signal_type) {
3750         case CFG80211_SIGNAL_TYPE_MBM:
3751                 PUT_SINFO(SIGNAL, signal, u8);
3752                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3753                 break;
3754         default:
3755                 break;
3756         }
3757         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3758                 if (!nl80211_put_signal(msg, sinfo->chains,
3759                                         sinfo->chain_signal,
3760                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3761                         goto nla_put_failure;
3762         }
3763         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3764                 if (!nl80211_put_signal(msg, sinfo->chains,
3765                                         sinfo->chain_signal_avg,
3766                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3767                         goto nla_put_failure;
3768         }
3769         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3770                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3771                                           NL80211_STA_INFO_TX_BITRATE))
3772                         goto nla_put_failure;
3773         }
3774         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3775                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3776                                           NL80211_STA_INFO_RX_BITRATE))
3777                         goto nla_put_failure;
3778         }
3779
3780         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3781         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3782         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3783         PUT_SINFO(TX_FAILED, tx_failed, u32);
3784         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3785         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3786         PUT_SINFO(LOCAL_PM, local_pm, u32);
3787         PUT_SINFO(PEER_PM, peer_pm, u32);
3788         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3789
3790         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3791                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3792                 if (!bss_param)
3793                         goto nla_put_failure;
3794
3795                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3796                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3797                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3798                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3799                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3800                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3801                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3802                                sinfo->bss_param.dtim_period) ||
3803                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3804                                 sinfo->bss_param.beacon_interval))
3805                         goto nla_put_failure;
3806
3807                 nla_nest_end(msg, bss_param);
3808         }
3809         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3810             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3811                     sizeof(struct nl80211_sta_flag_update),
3812                     &sinfo->sta_flags))
3813                 goto nla_put_failure;
3814
3815         PUT_SINFO(T_OFFSET, t_offset, u64);
3816         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3817         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3818         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3819
3820 #undef PUT_SINFO
3821
3822         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3823                 struct nlattr *tidsattr;
3824                 int tid;
3825
3826                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3827                 if (!tidsattr)
3828                         goto nla_put_failure;
3829
3830                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3831                         struct cfg80211_tid_stats *tidstats;
3832                         struct nlattr *tidattr;
3833
3834                         tidstats = &sinfo->pertid[tid];
3835
3836                         if (!tidstats->filled)
3837                                 continue;
3838
3839                         tidattr = nla_nest_start(msg, tid + 1);
3840                         if (!tidattr)
3841                                 goto nla_put_failure;
3842
3843 #define PUT_TIDVAL(attr, memb, type) do {                               \
3844         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3845             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3846                              tidstats->memb))                           \
3847                 goto nla_put_failure;                                   \
3848         } while (0)
3849
3850                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3851                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3852                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3853                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3854
3855 #undef PUT_TIDVAL
3856                         nla_nest_end(msg, tidattr);
3857                 }
3858
3859                 nla_nest_end(msg, tidsattr);
3860         }
3861
3862         nla_nest_end(msg, sinfoattr);
3863
3864         if (sinfo->assoc_req_ies_len &&
3865             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3866                     sinfo->assoc_req_ies))
3867                 goto nla_put_failure;
3868
3869         genlmsg_end(msg, hdr);
3870         return 0;
3871
3872  nla_put_failure:
3873         genlmsg_cancel(msg, hdr);
3874         return -EMSGSIZE;
3875 }
3876
3877 static int nl80211_dump_station(struct sk_buff *skb,
3878                                 struct netlink_callback *cb)
3879 {
3880         struct station_info sinfo;
3881         struct cfg80211_registered_device *rdev;
3882         struct wireless_dev *wdev;
3883         u8 mac_addr[ETH_ALEN];
3884         int sta_idx = cb->args[2];
3885         int err;
3886
3887         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3888         if (err)
3889                 return err;
3890
3891         if (!wdev->netdev) {
3892                 err = -EINVAL;
3893                 goto out_err;
3894         }
3895
3896         if (!rdev->ops->dump_station) {
3897                 err = -EOPNOTSUPP;
3898                 goto out_err;
3899         }
3900
3901         while (1) {
3902                 memset(&sinfo, 0, sizeof(sinfo));
3903                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3904                                         mac_addr, &sinfo);
3905                 if (err == -ENOENT)
3906                         break;
3907                 if (err)
3908                         goto out_err;
3909
3910                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3911                                 NETLINK_CB(cb->skb).portid,
3912                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3913                                 rdev, wdev->netdev, mac_addr,
3914                                 &sinfo) < 0)
3915                         goto out;
3916
3917                 sta_idx++;
3918         }
3919
3920
3921  out:
3922         cb->args[2] = sta_idx;
3923         err = skb->len;
3924  out_err:
3925         nl80211_finish_wdev_dump(rdev);
3926
3927         return err;
3928 }
3929
3930 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3931 {
3932         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3933         struct net_device *dev = info->user_ptr[1];
3934         struct station_info sinfo;
3935         struct sk_buff *msg;
3936         u8 *mac_addr = NULL;
3937         int err;
3938
3939         memset(&sinfo, 0, sizeof(sinfo));
3940
3941         if (!info->attrs[NL80211_ATTR_MAC])
3942                 return -EINVAL;
3943
3944         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3945
3946         if (!rdev->ops->get_station)
3947                 return -EOPNOTSUPP;
3948
3949         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3950         if (err)
3951                 return err;
3952
3953         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3954         if (!msg)
3955                 return -ENOMEM;
3956
3957         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
3958                                  info->snd_portid, info->snd_seq, 0,
3959                                  rdev, dev, mac_addr, &sinfo) < 0) {
3960                 nlmsg_free(msg);
3961                 return -ENOBUFS;
3962         }
3963
3964         return genlmsg_reply(msg, info);
3965 }
3966
3967 int cfg80211_check_station_change(struct wiphy *wiphy,
3968                                   struct station_parameters *params,
3969                                   enum cfg80211_station_type statype)
3970 {
3971         if (params->listen_interval != -1 &&
3972             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
3973                 return -EINVAL;
3974
3975         if (params->aid &&
3976             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
3977             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
3978                 return -EINVAL;
3979
3980         /* When you run into this, adjust the code below for the new flag */
3981         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3982
3983         switch (statype) {
3984         case CFG80211_STA_MESH_PEER_KERNEL:
3985         case CFG80211_STA_MESH_PEER_USER:
3986                 /*
3987                  * No ignoring the TDLS flag here -- the userspace mesh
3988                  * code doesn't have the bug of including TDLS in the
3989                  * mask everywhere.
3990                  */
3991                 if (params->sta_flags_mask &
3992                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3993                                   BIT(NL80211_STA_FLAG_MFP) |
3994                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3995                         return -EINVAL;
3996                 break;
3997         case CFG80211_STA_TDLS_PEER_SETUP:
3998         case CFG80211_STA_TDLS_PEER_ACTIVE:
3999                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4000                         return -EINVAL;
4001                 /* ignore since it can't change */
4002                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4003                 break;
4004         default:
4005                 /* disallow mesh-specific things */
4006                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4007                         return -EINVAL;
4008                 if (params->local_pm)
4009                         return -EINVAL;
4010                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4011                         return -EINVAL;
4012         }
4013
4014         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4015             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4016                 /* TDLS can't be set, ... */
4017                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4018                         return -EINVAL;
4019                 /*
4020                  * ... but don't bother the driver with it. This works around
4021                  * a hostapd/wpa_supplicant issue -- it always includes the
4022                  * TLDS_PEER flag in the mask even for AP mode.
4023                  */
4024                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4025         }
4026
4027         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4028             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4029                 /* reject other things that can't change */
4030                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4031                         return -EINVAL;
4032                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4033                         return -EINVAL;
4034                 if (params->supported_rates)
4035                         return -EINVAL;
4036                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4037                         return -EINVAL;
4038         }
4039
4040         if (statype != CFG80211_STA_AP_CLIENT &&
4041             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4042                 if (params->vlan)
4043                         return -EINVAL;
4044         }
4045
4046         switch (statype) {
4047         case CFG80211_STA_AP_MLME_CLIENT:
4048                 /* Use this only for authorizing/unauthorizing a station */
4049                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4050                         return -EOPNOTSUPP;
4051                 break;
4052         case CFG80211_STA_AP_CLIENT:
4053         case CFG80211_STA_AP_CLIENT_UNASSOC:
4054                 /* accept only the listed bits */
4055                 if (params->sta_flags_mask &
4056                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4057                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4058                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4059                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4060                                   BIT(NL80211_STA_FLAG_WME) |
4061                                   BIT(NL80211_STA_FLAG_MFP)))
4062                         return -EINVAL;
4063
4064                 /* but authenticated/associated only if driver handles it */
4065                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4066                     params->sta_flags_mask &
4067                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4068                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4069                         return -EINVAL;
4070                 break;
4071         case CFG80211_STA_IBSS:
4072         case CFG80211_STA_AP_STA:
4073                 /* reject any changes other than AUTHORIZED */
4074                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4075                         return -EINVAL;
4076                 break;
4077         case CFG80211_STA_TDLS_PEER_SETUP:
4078                 /* reject any changes other than AUTHORIZED or WME */
4079                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4080                                                BIT(NL80211_STA_FLAG_WME)))
4081                         return -EINVAL;
4082                 /* force (at least) rates when authorizing */
4083                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4084                     !params->supported_rates)
4085                         return -EINVAL;
4086                 break;
4087         case CFG80211_STA_TDLS_PEER_ACTIVE:
4088                 /* reject any changes */
4089                 return -EINVAL;
4090         case CFG80211_STA_MESH_PEER_KERNEL:
4091                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4092                         return -EINVAL;
4093                 break;
4094         case CFG80211_STA_MESH_PEER_USER:
4095                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4096                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4097                         return -EINVAL;
4098                 break;
4099         }
4100
4101         return 0;
4102 }
4103 EXPORT_SYMBOL(cfg80211_check_station_change);
4104
4105 /*
4106  * Get vlan interface making sure it is running and on the right wiphy.
4107  */
4108 static struct net_device *get_vlan(struct genl_info *info,
4109                                    struct cfg80211_registered_device *rdev)
4110 {
4111         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4112         struct net_device *v;
4113         int ret;
4114
4115         if (!vlanattr)
4116                 return NULL;
4117
4118         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4119         if (!v)
4120                 return ERR_PTR(-ENODEV);
4121
4122         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4123                 ret = -EINVAL;
4124                 goto error;
4125         }
4126
4127         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4128             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4129             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4130                 ret = -EINVAL;
4131                 goto error;
4132         }
4133
4134         if (!netif_running(v)) {
4135                 ret = -ENETDOWN;
4136                 goto error;
4137         }
4138
4139         return v;
4140  error:
4141         dev_put(v);
4142         return ERR_PTR(ret);
4143 }
4144
4145 static const struct nla_policy
4146 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4147         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4148         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4149 };
4150
4151 static int nl80211_parse_sta_wme(struct genl_info *info,
4152                                  struct station_parameters *params)
4153 {
4154         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4155         struct nlattr *nla;
4156         int err;
4157
4158         /* parse WME attributes if present */
4159         if (!info->attrs[NL80211_ATTR_STA_WME])
4160                 return 0;
4161
4162         nla = info->attrs[NL80211_ATTR_STA_WME];
4163         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4164                                nl80211_sta_wme_policy);
4165         if (err)
4166                 return err;
4167
4168         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4169                 params->uapsd_queues = nla_get_u8(
4170                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4171         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4172                 return -EINVAL;
4173
4174         if (tb[NL80211_STA_WME_MAX_SP])
4175                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4176
4177         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4178                 return -EINVAL;
4179
4180         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4181
4182         return 0;
4183 }
4184
4185 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4186                                       struct station_parameters *params)
4187 {
4188         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4189                 params->supported_channels =
4190                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4191                 params->supported_channels_len =
4192                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4193                 /*
4194                  * Need to include at least one (first channel, number of
4195                  * channels) tuple for each subband, and must have proper
4196                  * tuples for the rest of the data as well.
4197                  */
4198                 if (params->supported_channels_len < 2)
4199                         return -EINVAL;
4200                 if (params->supported_channels_len % 2)
4201                         return -EINVAL;
4202         }
4203
4204         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4205                 params->supported_oper_classes =
4206                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4207                 params->supported_oper_classes_len =
4208                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4209                 /*
4210                  * The value of the Length field of the Supported Operating
4211                  * Classes element is between 2 and 253.
4212                  */
4213                 if (params->supported_oper_classes_len < 2 ||
4214                     params->supported_oper_classes_len > 253)
4215                         return -EINVAL;
4216         }
4217         return 0;
4218 }
4219
4220 static int nl80211_set_station_tdls(struct genl_info *info,
4221                                     struct station_parameters *params)
4222 {
4223         int err;
4224         /* Dummy STA entry gets updated once the peer capabilities are known */
4225         if (info->attrs[NL80211_ATTR_PEER_AID])
4226                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4227         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4228                 params->ht_capa =
4229                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4230         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4231                 params->vht_capa =
4232                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4233
4234         err = nl80211_parse_sta_channel_info(info, params);
4235         if (err)
4236                 return err;
4237
4238         return nl80211_parse_sta_wme(info, params);
4239 }
4240
4241 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4242 {
4243         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4244         struct net_device *dev = info->user_ptr[1];
4245         struct station_parameters params;
4246         u8 *mac_addr;
4247         int err;
4248
4249         memset(&params, 0, sizeof(params));
4250
4251         if (!rdev->ops->change_station)
4252                 return -EOPNOTSUPP;
4253
4254         /*
4255          * AID and listen_interval properties can be set only for unassociated
4256          * station. Include these parameters here and will check them in
4257          * cfg80211_check_station_change().
4258          */
4259         if (info->attrs[NL80211_ATTR_PEER_AID])
4260                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4261
4262         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4263                 params.listen_interval =
4264                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4265         else
4266                 params.listen_interval = -1;
4267
4268         if (!info->attrs[NL80211_ATTR_MAC])
4269                 return -EINVAL;
4270
4271         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4272
4273         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4274                 params.supported_rates =
4275                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4276                 params.supported_rates_len =
4277                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4278         }
4279
4280         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4281                 params.capability =
4282                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4283                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4284         }
4285
4286         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4287                 params.ext_capab =
4288                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4289                 params.ext_capab_len =
4290                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4291         }
4292
4293         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4294                 return -EINVAL;
4295
4296         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4297                 params.plink_action =
4298                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4299                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4300                         return -EINVAL;
4301         }
4302
4303         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4304                 params.plink_state =
4305                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4306                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4307                         return -EINVAL;
4308                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4309         }
4310
4311         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4312                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4313                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4314
4315                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4316                     pm > NL80211_MESH_POWER_MAX)
4317                         return -EINVAL;
4318
4319                 params.local_pm = pm;
4320         }
4321
4322         /* Include parameters for TDLS peer (will check later) */
4323         err = nl80211_set_station_tdls(info, &params);
4324         if (err)
4325                 return err;
4326
4327         params.vlan = get_vlan(info, rdev);
4328         if (IS_ERR(params.vlan))
4329                 return PTR_ERR(params.vlan);
4330
4331         switch (dev->ieee80211_ptr->iftype) {
4332         case NL80211_IFTYPE_AP:
4333         case NL80211_IFTYPE_AP_VLAN:
4334         case NL80211_IFTYPE_P2P_GO:
4335         case NL80211_IFTYPE_P2P_CLIENT:
4336         case NL80211_IFTYPE_STATION:
4337         case NL80211_IFTYPE_ADHOC:
4338         case NL80211_IFTYPE_MESH_POINT:
4339                 break;
4340         default:
4341                 err = -EOPNOTSUPP;
4342                 goto out_put_vlan;
4343         }
4344
4345         /* driver will call cfg80211_check_station_change() */
4346         err = rdev_change_station(rdev, dev, mac_addr, &params);
4347
4348  out_put_vlan:
4349         if (params.vlan)
4350                 dev_put(params.vlan);
4351
4352         return err;
4353 }
4354
4355 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4356 {
4357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4358         int err;
4359         struct net_device *dev = info->user_ptr[1];
4360         struct station_parameters params;
4361         u8 *mac_addr = NULL;
4362
4363         memset(&params, 0, sizeof(params));
4364
4365         if (!rdev->ops->add_station)
4366                 return -EOPNOTSUPP;
4367
4368         if (!info->attrs[NL80211_ATTR_MAC])
4369                 return -EINVAL;
4370
4371         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4372                 return -EINVAL;
4373
4374         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4375                 return -EINVAL;
4376
4377         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4378             !info->attrs[NL80211_ATTR_PEER_AID])
4379                 return -EINVAL;
4380
4381         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4382         params.supported_rates =
4383                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4384         params.supported_rates_len =
4385                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4386         params.listen_interval =
4387                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4388
4389         if (info->attrs[NL80211_ATTR_PEER_AID])
4390                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4391         else
4392                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4393         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4394                 return -EINVAL;
4395
4396         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4397                 params.capability =
4398                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4399                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4400         }
4401
4402         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4403                 params.ext_capab =
4404                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4405                 params.ext_capab_len =
4406                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4407         }
4408
4409         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4410                 params.ht_capa =
4411                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4412
4413         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4414                 params.vht_capa =
4415                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4416
4417         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4418                 params.opmode_notif_used = true;
4419                 params.opmode_notif =
4420                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4421         }
4422
4423         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4424                 params.plink_action =
4425                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4426                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4427                         return -EINVAL;
4428         }
4429
4430         err = nl80211_parse_sta_channel_info(info, &params);
4431         if (err)
4432                 return err;
4433
4434         err = nl80211_parse_sta_wme(info, &params);
4435         if (err)
4436                 return err;
4437
4438         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4439                 return -EINVAL;
4440
4441         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4442          * as userspace might just pass through the capabilities from the IEs
4443          * directly, rather than enforcing this restriction and returning an
4444          * error in this case.
4445          */
4446         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4447                 params.ht_capa = NULL;
4448                 params.vht_capa = NULL;
4449         }
4450
4451         /* When you run into this, adjust the code below for the new flag */
4452         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4453
4454         switch (dev->ieee80211_ptr->iftype) {
4455         case NL80211_IFTYPE_AP:
4456         case NL80211_IFTYPE_AP_VLAN:
4457         case NL80211_IFTYPE_P2P_GO:
4458                 /* ignore WME attributes if iface/sta is not capable */
4459                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4460                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4461                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4462
4463                 /* TDLS peers cannot be added */
4464                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4465                     info->attrs[NL80211_ATTR_PEER_AID])
4466                         return -EINVAL;
4467                 /* but don't bother the driver with it */
4468                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4469
4470                 /* allow authenticated/associated only if driver handles it */
4471                 if (!(rdev->wiphy.features &
4472                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4473                     params.sta_flags_mask &
4474                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4475                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4476                         return -EINVAL;
4477
4478                 /* must be last in here for error handling */
4479                 params.vlan = get_vlan(info, rdev);
4480                 if (IS_ERR(params.vlan))
4481                         return PTR_ERR(params.vlan);
4482                 break;
4483         case NL80211_IFTYPE_MESH_POINT:
4484                 /* ignore uAPSD data */
4485                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4486
4487                 /* associated is disallowed */
4488                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4489                         return -EINVAL;
4490                 /* TDLS peers cannot be added */
4491                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4492                     info->attrs[NL80211_ATTR_PEER_AID])
4493                         return -EINVAL;
4494                 break;
4495         case NL80211_IFTYPE_STATION:
4496         case NL80211_IFTYPE_P2P_CLIENT:
4497                 /* ignore uAPSD data */
4498                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4499
4500                 /* these are disallowed */
4501                 if (params.sta_flags_mask &
4502                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4503                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4504                         return -EINVAL;
4505                 /* Only TDLS peers can be added */
4506                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4507                         return -EINVAL;
4508                 /* Can only add if TDLS ... */
4509                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4510                         return -EOPNOTSUPP;
4511                 /* ... with external setup is supported */
4512                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4513                         return -EOPNOTSUPP;
4514                 /*
4515                  * Older wpa_supplicant versions always mark the TDLS peer
4516                  * as authorized, but it shouldn't yet be.
4517                  */
4518                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4519                 break;
4520         default:
4521                 return -EOPNOTSUPP;
4522         }
4523
4524         /* be aware of params.vlan when changing code here */
4525
4526         err = rdev_add_station(rdev, dev, mac_addr, &params);
4527
4528         if (params.vlan)
4529                 dev_put(params.vlan);
4530         return err;
4531 }
4532
4533 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4534 {
4535         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4536         struct net_device *dev = info->user_ptr[1];
4537         struct station_del_parameters params;
4538
4539         memset(&params, 0, sizeof(params));
4540
4541         if (info->attrs[NL80211_ATTR_MAC])
4542                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4543
4544         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4545             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4546             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4547             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4548                 return -EINVAL;
4549
4550         if (!rdev->ops->del_station)
4551                 return -EOPNOTSUPP;
4552
4553         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4554                 params.subtype =
4555                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4556                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4557                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4558                         return -EINVAL;
4559         } else {
4560                 /* Default to Deauthentication frame */
4561                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4562         }
4563
4564         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4565                 params.reason_code =
4566                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4567                 if (params.reason_code == 0)
4568                         return -EINVAL; /* 0 is reserved */
4569         } else {
4570                 /* Default to reason code 2 */
4571                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4572         }
4573
4574         return rdev_del_station(rdev, dev, &params);
4575 }
4576
4577 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4578                                 int flags, struct net_device *dev,
4579                                 u8 *dst, u8 *next_hop,
4580                                 struct mpath_info *pinfo)
4581 {
4582         void *hdr;
4583         struct nlattr *pinfoattr;
4584
4585         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4586         if (!hdr)
4587                 return -1;
4588
4589         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4590             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4591             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4592             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4593                 goto nla_put_failure;
4594
4595         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4596         if (!pinfoattr)
4597                 goto nla_put_failure;
4598         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4599             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4600                         pinfo->frame_qlen))
4601                 goto nla_put_failure;
4602         if (((pinfo->filled & MPATH_INFO_SN) &&
4603              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4604             ((pinfo->filled & MPATH_INFO_METRIC) &&
4605              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4606                          pinfo->metric)) ||
4607             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4608              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4609                          pinfo->exptime)) ||
4610             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4611              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4612                         pinfo->flags)) ||
4613             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4614              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4615                          pinfo->discovery_timeout)) ||
4616             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4617              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4618                         pinfo->discovery_retries)))
4619                 goto nla_put_failure;
4620
4621         nla_nest_end(msg, pinfoattr);
4622
4623         genlmsg_end(msg, hdr);
4624         return 0;
4625
4626  nla_put_failure:
4627         genlmsg_cancel(msg, hdr);
4628         return -EMSGSIZE;
4629 }
4630
4631 static int nl80211_dump_mpath(struct sk_buff *skb,
4632                               struct netlink_callback *cb)
4633 {
4634         struct mpath_info pinfo;
4635         struct cfg80211_registered_device *rdev;
4636         struct wireless_dev *wdev;
4637         u8 dst[ETH_ALEN];
4638         u8 next_hop[ETH_ALEN];
4639         int path_idx = cb->args[2];
4640         int err;
4641
4642         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4643         if (err)
4644                 return err;
4645
4646         if (!rdev->ops->dump_mpath) {
4647                 err = -EOPNOTSUPP;
4648                 goto out_err;
4649         }
4650
4651         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4652                 err = -EOPNOTSUPP;
4653                 goto out_err;
4654         }
4655
4656         while (1) {
4657                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4658                                       next_hop, &pinfo);
4659                 if (err == -ENOENT)
4660                         break;
4661                 if (err)
4662                         goto out_err;
4663
4664                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4665                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4666                                        wdev->netdev, dst, next_hop,
4667                                        &pinfo) < 0)
4668                         goto out;
4669
4670                 path_idx++;
4671         }
4672
4673
4674  out:
4675         cb->args[2] = path_idx;
4676         err = skb->len;
4677  out_err:
4678         nl80211_finish_wdev_dump(rdev);
4679         return err;
4680 }
4681
4682 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4683 {
4684         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4685         int err;
4686         struct net_device *dev = info->user_ptr[1];
4687         struct mpath_info pinfo;
4688         struct sk_buff *msg;
4689         u8 *dst = NULL;
4690         u8 next_hop[ETH_ALEN];
4691
4692         memset(&pinfo, 0, sizeof(pinfo));
4693
4694         if (!info->attrs[NL80211_ATTR_MAC])
4695                 return -EINVAL;
4696
4697         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4698
4699         if (!rdev->ops->get_mpath)
4700                 return -EOPNOTSUPP;
4701
4702         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4703                 return -EOPNOTSUPP;
4704
4705         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4706         if (err)
4707                 return err;
4708
4709         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4710         if (!msg)
4711                 return -ENOMEM;
4712
4713         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4714                                  dev, dst, next_hop, &pinfo) < 0) {
4715                 nlmsg_free(msg);
4716                 return -ENOBUFS;
4717         }
4718
4719         return genlmsg_reply(msg, info);
4720 }
4721
4722 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4723 {
4724         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4725         struct net_device *dev = info->user_ptr[1];
4726         u8 *dst = NULL;
4727         u8 *next_hop = NULL;
4728
4729         if (!info->attrs[NL80211_ATTR_MAC])
4730                 return -EINVAL;
4731
4732         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4733                 return -EINVAL;
4734
4735         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4736         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4737
4738         if (!rdev->ops->change_mpath)
4739                 return -EOPNOTSUPP;
4740
4741         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4742                 return -EOPNOTSUPP;
4743
4744         return rdev_change_mpath(rdev, dev, dst, next_hop);
4745 }
4746
4747 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4748 {
4749         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4750         struct net_device *dev = info->user_ptr[1];
4751         u8 *dst = NULL;
4752         u8 *next_hop = NULL;
4753
4754         if (!info->attrs[NL80211_ATTR_MAC])
4755                 return -EINVAL;
4756
4757         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4758                 return -EINVAL;
4759
4760         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4761         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4762
4763         if (!rdev->ops->add_mpath)
4764                 return -EOPNOTSUPP;
4765
4766         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4767                 return -EOPNOTSUPP;
4768
4769         return rdev_add_mpath(rdev, dev, dst, next_hop);
4770 }
4771
4772 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4773 {
4774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4775         struct net_device *dev = info->user_ptr[1];
4776         u8 *dst = NULL;
4777
4778         if (info->attrs[NL80211_ATTR_MAC])
4779                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4780
4781         if (!rdev->ops->del_mpath)
4782                 return -EOPNOTSUPP;
4783
4784         return rdev_del_mpath(rdev, dev, dst);
4785 }
4786
4787 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4788 {
4789         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4790         int err;
4791         struct net_device *dev = info->user_ptr[1];
4792         struct mpath_info pinfo;
4793         struct sk_buff *msg;
4794         u8 *dst = NULL;
4795         u8 mpp[ETH_ALEN];
4796
4797         memset(&pinfo, 0, sizeof(pinfo));
4798
4799         if (!info->attrs[NL80211_ATTR_MAC])
4800                 return -EINVAL;
4801
4802         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4803
4804         if (!rdev->ops->get_mpp)
4805                 return -EOPNOTSUPP;
4806
4807         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4808                 return -EOPNOTSUPP;
4809
4810         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4811         if (err)
4812                 return err;
4813
4814         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4815         if (!msg)
4816                 return -ENOMEM;
4817
4818         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4819                                dev, dst, mpp, &pinfo) < 0) {
4820                 nlmsg_free(msg);
4821                 return -ENOBUFS;
4822         }
4823
4824         return genlmsg_reply(msg, info);
4825 }
4826
4827 static int nl80211_dump_mpp(struct sk_buff *skb,
4828                             struct netlink_callback *cb)
4829 {
4830         struct mpath_info pinfo;
4831         struct cfg80211_registered_device *rdev;
4832         struct wireless_dev *wdev;
4833         u8 dst[ETH_ALEN];
4834         u8 mpp[ETH_ALEN];
4835         int path_idx = cb->args[2];
4836         int err;
4837
4838         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4839         if (err)
4840                 return err;
4841
4842         if (!rdev->ops->dump_mpp) {
4843                 err = -EOPNOTSUPP;
4844                 goto out_err;
4845         }
4846
4847         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4848                 err = -EOPNOTSUPP;
4849                 goto out_err;
4850         }
4851
4852         while (1) {
4853                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4854                                     mpp, &pinfo);
4855                 if (err == -ENOENT)
4856                         break;
4857                 if (err)
4858                         goto out_err;
4859
4860                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4861                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4862                                        wdev->netdev, dst, mpp,
4863                                        &pinfo) < 0)
4864                         goto out;
4865
4866                 path_idx++;
4867         }
4868
4869  out:
4870         cb->args[2] = path_idx;
4871         err = skb->len;
4872  out_err:
4873         nl80211_finish_wdev_dump(rdev);
4874         return err;
4875 }
4876
4877 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4878 {
4879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4880         struct net_device *dev = info->user_ptr[1];
4881         struct wireless_dev *wdev = dev->ieee80211_ptr;
4882         struct bss_parameters params;
4883         int err;
4884
4885         memset(&params, 0, sizeof(params));
4886         /* default to not changing parameters */
4887         params.use_cts_prot = -1;
4888         params.use_short_preamble = -1;
4889         params.use_short_slot_time = -1;
4890         params.ap_isolate = -1;
4891         params.ht_opmode = -1;
4892         params.p2p_ctwindow = -1;
4893         params.p2p_opp_ps = -1;
4894
4895         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4896                 params.use_cts_prot =
4897                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4898         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4899                 params.use_short_preamble =
4900                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4901         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4902                 params.use_short_slot_time =
4903                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4904         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4905                 params.basic_rates =
4906                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4907                 params.basic_rates_len =
4908                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4909         }
4910         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4911                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4912         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4913                 params.ht_opmode =
4914                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4915
4916         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4917                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4918                         return -EINVAL;
4919                 params.p2p_ctwindow =
4920                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4921                 if (params.p2p_ctwindow < 0)
4922                         return -EINVAL;
4923                 if (params.p2p_ctwindow != 0 &&
4924                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4925                         return -EINVAL;
4926         }
4927
4928         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4929                 u8 tmp;
4930
4931                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4932                         return -EINVAL;
4933                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4934                 if (tmp > 1)
4935                         return -EINVAL;
4936                 params.p2p_opp_ps = tmp;
4937                 if (params.p2p_opp_ps &&
4938                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4939                         return -EINVAL;
4940         }
4941
4942         if (!rdev->ops->change_bss)
4943                 return -EOPNOTSUPP;
4944
4945         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4946             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4947                 return -EOPNOTSUPP;
4948
4949         wdev_lock(wdev);
4950         err = rdev_change_bss(rdev, dev, &params);
4951         wdev_unlock(wdev);
4952
4953         return err;
4954 }
4955
4956 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4957 {
4958         char *data = NULL;
4959         bool is_indoor;
4960         enum nl80211_user_reg_hint_type user_reg_hint_type;
4961         u32 owner_nlportid;
4962
4963
4964         /*
4965          * You should only get this when cfg80211 hasn't yet initialized
4966          * completely when built-in to the kernel right between the time
4967          * window between nl80211_init() and regulatory_init(), if that is
4968          * even possible.
4969          */
4970         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4971                 return -EINPROGRESS;
4972
4973         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4974                 user_reg_hint_type =
4975                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4976         else
4977                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4978
4979         switch (user_reg_hint_type) {
4980         case NL80211_USER_REG_HINT_USER:
4981         case NL80211_USER_REG_HINT_CELL_BASE:
4982                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4983                         return -EINVAL;
4984
4985                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4986                 return regulatory_hint_user(data, user_reg_hint_type);
4987         case NL80211_USER_REG_HINT_INDOOR:
4988                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
4989                         owner_nlportid = info->snd_portid;
4990                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
4991                 } else {
4992                         owner_nlportid = 0;
4993                         is_indoor = true;
4994                 }
4995
4996                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
4997         default:
4998                 return -EINVAL;
4999         }
5000 }
5001
5002 static int nl80211_get_mesh_config(struct sk_buff *skb,
5003                                    struct genl_info *info)
5004 {
5005         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5006         struct net_device *dev = info->user_ptr[1];
5007         struct wireless_dev *wdev = dev->ieee80211_ptr;
5008         struct mesh_config cur_params;
5009         int err = 0;
5010         void *hdr;
5011         struct nlattr *pinfoattr;
5012         struct sk_buff *msg;
5013
5014         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5015                 return -EOPNOTSUPP;
5016
5017         if (!rdev->ops->get_mesh_config)
5018                 return -EOPNOTSUPP;
5019
5020         wdev_lock(wdev);
5021         /* If not connected, get default parameters */
5022         if (!wdev->mesh_id_len)
5023                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5024         else
5025                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5026         wdev_unlock(wdev);
5027
5028         if (err)
5029                 return err;
5030
5031         /* Draw up a netlink message to send back */
5032         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5033         if (!msg)
5034                 return -ENOMEM;
5035         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5036                              NL80211_CMD_GET_MESH_CONFIG);
5037         if (!hdr)
5038                 goto out;
5039         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5040         if (!pinfoattr)
5041                 goto nla_put_failure;
5042         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5043             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5044                         cur_params.dot11MeshRetryTimeout) ||
5045             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5046                         cur_params.dot11MeshConfirmTimeout) ||
5047             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5048                         cur_params.dot11MeshHoldingTimeout) ||
5049             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5050                         cur_params.dot11MeshMaxPeerLinks) ||
5051             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5052                        cur_params.dot11MeshMaxRetries) ||
5053             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5054                        cur_params.dot11MeshTTL) ||
5055             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5056                        cur_params.element_ttl) ||
5057             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5058                        cur_params.auto_open_plinks) ||
5059             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5060                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5061             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5062                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5063             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5064                         cur_params.path_refresh_time) ||
5065             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5066                         cur_params.min_discovery_timeout) ||
5067             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5068                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5069             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5070                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5071             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5072                         cur_params.dot11MeshHWMPperrMinInterval) ||
5073             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5074                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5075             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5076                        cur_params.dot11MeshHWMPRootMode) ||
5077             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5078                         cur_params.dot11MeshHWMPRannInterval) ||
5079             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5080                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5081             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5082                        cur_params.dot11MeshForwarding) ||
5083             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5084                         cur_params.rssi_threshold) ||
5085             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5086                         cur_params.ht_opmode) ||
5087             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5088                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5089             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5090                         cur_params.dot11MeshHWMProotInterval) ||
5091             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5092                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5093             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5094                         cur_params.power_mode) ||
5095             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5096                         cur_params.dot11MeshAwakeWindowDuration) ||
5097             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5098                         cur_params.plink_timeout))
5099                 goto nla_put_failure;
5100         nla_nest_end(msg, pinfoattr);
5101         genlmsg_end(msg, hdr);
5102         return genlmsg_reply(msg, info);
5103
5104  nla_put_failure:
5105         genlmsg_cancel(msg, hdr);
5106  out:
5107         nlmsg_free(msg);
5108         return -ENOBUFS;
5109 }
5110
5111 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5112         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5113         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5114         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5115         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5116         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5117         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5118         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5119         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5120         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5121         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5122         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5123         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5124         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5125         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5126         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5127         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5128         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5129         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5130         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5131         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5132         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5133         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5134         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5135         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5136         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5137         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5138         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5139         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5140 };
5141
5142 static const struct nla_policy
5143         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5144         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5145         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5146         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5147         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5148         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5149         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5150         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5151                                     .len = IEEE80211_MAX_DATA_LEN },
5152         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5153 };
5154
5155 static int nl80211_parse_mesh_config(struct genl_info *info,
5156                                      struct mesh_config *cfg,
5157                                      u32 *mask_out)
5158 {
5159         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5160         u32 mask = 0;
5161
5162 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5163 do {                                                                        \
5164         if (tb[attr]) {                                                     \
5165                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5166                         return -EINVAL;                                     \
5167                 cfg->param = fn(tb[attr]);                                  \
5168                 mask |= (1 << (attr - 1));                                  \
5169         }                                                                   \
5170 } while (0)
5171
5172
5173         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5174                 return -EINVAL;
5175         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5176                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5177                              nl80211_meshconf_params_policy))
5178                 return -EINVAL;
5179
5180         /* This makes sure that there aren't more than 32 mesh config
5181          * parameters (otherwise our bitfield scheme would not work.) */
5182         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5183
5184         /* Fill in the params struct */
5185         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5186                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5187                                   nla_get_u16);
5188         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5189                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5190                                   nla_get_u16);
5191         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5192                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5193                                   nla_get_u16);
5194         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5195                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5196                                   nla_get_u16);
5197         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5198                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5199                                   nla_get_u8);
5200         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5201                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5202         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5203                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5204                                   nla_get_u8);
5205         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5206                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5207                                   nla_get_u8);
5208         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5209                                   1, 255, mask,
5210                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5211                                   nla_get_u32);
5212         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5213                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5214                                   nla_get_u8);
5215         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5216                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5217                                   nla_get_u32);
5218         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5219                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5220                                   nla_get_u16);
5221         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5222                                   1, 65535, mask,
5223                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5224                                   nla_get_u32);
5225         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5226                                   1, 65535, mask,
5227                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5228                                   nla_get_u16);
5229         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5230                                   1, 65535, mask,
5231                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5232                                   nla_get_u16);
5233         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5234                                   dot11MeshHWMPnetDiameterTraversalTime,
5235                                   1, 65535, mask,
5236                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5237                                   nla_get_u16);
5238         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5239                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5240                                   nla_get_u8);
5241         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5242                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5243                                   nla_get_u16);
5244         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5245                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5246                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5247                                   nla_get_u8);
5248         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5249                                   mask, NL80211_MESHCONF_FORWARDING,
5250                                   nla_get_u8);
5251         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5252                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5253                                   nla_get_s32);
5254         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5255                                   mask, NL80211_MESHCONF_HT_OPMODE,
5256                                   nla_get_u16);
5257         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5258                                   1, 65535, mask,
5259                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5260                                   nla_get_u32);
5261         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5262                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5263                                   nla_get_u16);
5264         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5265                                   dot11MeshHWMPconfirmationInterval,
5266                                   1, 65535, mask,
5267                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5268                                   nla_get_u16);
5269         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5270                                   NL80211_MESH_POWER_ACTIVE,
5271                                   NL80211_MESH_POWER_MAX,
5272                                   mask, NL80211_MESHCONF_POWER_MODE,
5273                                   nla_get_u32);
5274         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5275                                   0, 65535, mask,
5276                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5277         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5278                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5279                                   nla_get_u32);
5280         if (mask_out)
5281                 *mask_out = mask;
5282
5283         return 0;
5284
5285 #undef FILL_IN_MESH_PARAM_IF_SET
5286 }
5287
5288 static int nl80211_parse_mesh_setup(struct genl_info *info,
5289                                      struct mesh_setup *setup)
5290 {
5291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5292         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5293
5294         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5295                 return -EINVAL;
5296         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5297                              info->attrs[NL80211_ATTR_MESH_SETUP],
5298                              nl80211_mesh_setup_params_policy))
5299                 return -EINVAL;
5300
5301         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5302                 setup->sync_method =
5303                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5304                  IEEE80211_SYNC_METHOD_VENDOR :
5305                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5306
5307         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5308                 setup->path_sel_proto =
5309                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5310                  IEEE80211_PATH_PROTOCOL_VENDOR :
5311                  IEEE80211_PATH_PROTOCOL_HWMP;
5312
5313         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5314                 setup->path_metric =
5315                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5316                  IEEE80211_PATH_METRIC_VENDOR :
5317                  IEEE80211_PATH_METRIC_AIRTIME;
5318
5319
5320         if (tb[NL80211_MESH_SETUP_IE]) {
5321                 struct nlattr *ieattr =
5322                         tb[NL80211_MESH_SETUP_IE];
5323                 if (!is_valid_ie_attr(ieattr))
5324                         return -EINVAL;
5325                 setup->ie = nla_data(ieattr);
5326                 setup->ie_len = nla_len(ieattr);
5327         }
5328         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5329             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5330                 return -EINVAL;
5331         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5332         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5333         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5334         if (setup->is_secure)
5335                 setup->user_mpm = true;
5336
5337         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5338                 if (!setup->user_mpm)
5339                         return -EINVAL;
5340                 setup->auth_id =
5341                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5342         }
5343
5344         return 0;
5345 }
5346
5347 static int nl80211_update_mesh_config(struct sk_buff *skb,
5348                                       struct genl_info *info)
5349 {
5350         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5351         struct net_device *dev = info->user_ptr[1];
5352         struct wireless_dev *wdev = dev->ieee80211_ptr;
5353         struct mesh_config cfg;
5354         u32 mask;
5355         int err;
5356
5357         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5358                 return -EOPNOTSUPP;
5359
5360         if (!rdev->ops->update_mesh_config)
5361                 return -EOPNOTSUPP;
5362
5363         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5364         if (err)
5365                 return err;
5366
5367         wdev_lock(wdev);
5368         if (!wdev->mesh_id_len)
5369                 err = -ENOLINK;
5370
5371         if (!err)
5372                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5373
5374         wdev_unlock(wdev);
5375
5376         return err;
5377 }
5378
5379 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5380                               struct sk_buff *msg)
5381 {
5382         struct nlattr *nl_reg_rules;
5383         unsigned int i;
5384
5385         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5386             (regdom->dfs_region &&
5387              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5388                 goto nla_put_failure;
5389
5390         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5391         if (!nl_reg_rules)
5392                 goto nla_put_failure;
5393
5394         for (i = 0; i < regdom->n_reg_rules; i++) {
5395                 struct nlattr *nl_reg_rule;
5396                 const struct ieee80211_reg_rule *reg_rule;
5397                 const struct ieee80211_freq_range *freq_range;
5398                 const struct ieee80211_power_rule *power_rule;
5399                 unsigned int max_bandwidth_khz;
5400
5401                 reg_rule = &regdom->reg_rules[i];
5402                 freq_range = &reg_rule->freq_range;
5403                 power_rule = &reg_rule->power_rule;
5404
5405                 nl_reg_rule = nla_nest_start(msg, i);
5406                 if (!nl_reg_rule)
5407                         goto nla_put_failure;
5408
5409                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5410                 if (!max_bandwidth_khz)
5411                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5412                                                                   reg_rule);
5413
5414                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5415                                 reg_rule->flags) ||
5416                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5417                                 freq_range->start_freq_khz) ||
5418                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5419                                 freq_range->end_freq_khz) ||
5420                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5421                                 max_bandwidth_khz) ||
5422                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5423                                 power_rule->max_antenna_gain) ||
5424                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5425                                 power_rule->max_eirp) ||
5426                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5427                                 reg_rule->dfs_cac_ms))
5428                         goto nla_put_failure;
5429
5430                 nla_nest_end(msg, nl_reg_rule);
5431         }
5432
5433         nla_nest_end(msg, nl_reg_rules);
5434         return 0;
5435
5436 nla_put_failure:
5437         return -EMSGSIZE;
5438 }
5439
5440 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5441 {
5442         const struct ieee80211_regdomain *regdom = NULL;
5443         struct cfg80211_registered_device *rdev;
5444         struct wiphy *wiphy = NULL;
5445         struct sk_buff *msg;
5446         void *hdr;
5447
5448         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5449         if (!msg)
5450                 return -ENOBUFS;
5451
5452         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5453                              NL80211_CMD_GET_REG);
5454         if (!hdr)
5455                 goto put_failure;
5456
5457         if (info->attrs[NL80211_ATTR_WIPHY]) {
5458                 bool self_managed;
5459
5460                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5461                 if (IS_ERR(rdev)) {
5462                         nlmsg_free(msg);
5463                         return PTR_ERR(rdev);
5464                 }
5465
5466                 wiphy = &rdev->wiphy;
5467                 self_managed = wiphy->regulatory_flags &
5468                                REGULATORY_WIPHY_SELF_MANAGED;
5469                 regdom = get_wiphy_regdom(wiphy);
5470
5471                 /* a self-managed-reg device must have a private regdom */
5472                 if (WARN_ON(!regdom && self_managed)) {
5473                         nlmsg_free(msg);
5474                         return -EINVAL;
5475                 }
5476
5477                 if (regdom &&
5478                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5479                         goto nla_put_failure;
5480         }
5481
5482         if (!wiphy && reg_last_request_cell_base() &&
5483             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5484                         NL80211_USER_REG_HINT_CELL_BASE))
5485                 goto nla_put_failure;
5486
5487         rcu_read_lock();
5488
5489         if (!regdom)
5490                 regdom = rcu_dereference(cfg80211_regdomain);
5491
5492         if (nl80211_put_regdom(regdom, msg))
5493                 goto nla_put_failure_rcu;
5494
5495         rcu_read_unlock();
5496
5497         genlmsg_end(msg, hdr);
5498         return genlmsg_reply(msg, info);
5499
5500 nla_put_failure_rcu:
5501         rcu_read_unlock();
5502 nla_put_failure:
5503         genlmsg_cancel(msg, hdr);
5504 put_failure:
5505         nlmsg_free(msg);
5506         return -EMSGSIZE;
5507 }
5508
5509 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5510                                u32 seq, int flags, struct wiphy *wiphy,
5511                                const struct ieee80211_regdomain *regdom)
5512 {
5513         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5514                                    NL80211_CMD_GET_REG);
5515
5516         if (!hdr)
5517                 return -1;
5518
5519         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5520
5521         if (nl80211_put_regdom(regdom, msg))
5522                 goto nla_put_failure;
5523
5524         if (!wiphy && reg_last_request_cell_base() &&
5525             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5526                         NL80211_USER_REG_HINT_CELL_BASE))
5527                 goto nla_put_failure;
5528
5529         if (wiphy &&
5530             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5531                 goto nla_put_failure;
5532
5533         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5534             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5535                 goto nla_put_failure;
5536
5537         genlmsg_end(msg, hdr);
5538         return 0;
5539
5540 nla_put_failure:
5541         genlmsg_cancel(msg, hdr);
5542         return -EMSGSIZE;
5543 }
5544
5545 static int nl80211_get_reg_dump(struct sk_buff *skb,
5546                                 struct netlink_callback *cb)
5547 {
5548         const struct ieee80211_regdomain *regdom = NULL;
5549         struct cfg80211_registered_device *rdev;
5550         int err, reg_idx, start = cb->args[2];
5551
5552         rtnl_lock();
5553
5554         if (cfg80211_regdomain && start == 0) {
5555                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5556                                           NLM_F_MULTI, NULL,
5557                                           rtnl_dereference(cfg80211_regdomain));
5558                 if (err < 0)
5559                         goto out_err;
5560         }
5561
5562         /* the global regdom is idx 0 */
5563         reg_idx = 1;
5564         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5565                 regdom = get_wiphy_regdom(&rdev->wiphy);
5566                 if (!regdom)
5567                         continue;
5568
5569                 if (++reg_idx <= start)
5570                         continue;
5571
5572                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5573                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5574                 if (err < 0) {
5575                         reg_idx--;
5576                         break;
5577                 }
5578         }
5579
5580         cb->args[2] = reg_idx;
5581         err = skb->len;
5582 out_err:
5583         rtnl_unlock();
5584         return err;
5585 }
5586
5587 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5588 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5589         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5590         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5591         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5592         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5593         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5594         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5595         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5596 };
5597
5598 static int parse_reg_rule(struct nlattr *tb[],
5599         struct ieee80211_reg_rule *reg_rule)
5600 {
5601         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5602         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5603
5604         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5605                 return -EINVAL;
5606         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5607                 return -EINVAL;
5608         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5609                 return -EINVAL;
5610         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5611                 return -EINVAL;
5612         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5613                 return -EINVAL;
5614
5615         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5616
5617         freq_range->start_freq_khz =
5618                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5619         freq_range->end_freq_khz =
5620                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5621         freq_range->max_bandwidth_khz =
5622                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5623
5624         power_rule->max_eirp =
5625                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5626
5627         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5628                 power_rule->max_antenna_gain =
5629                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5630
5631         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5632                 reg_rule->dfs_cac_ms =
5633                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5634
5635         return 0;
5636 }
5637
5638 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5639 {
5640         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5641         struct nlattr *nl_reg_rule;
5642         char *alpha2;
5643         int rem_reg_rules, r;
5644         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5645         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5646         struct ieee80211_regdomain *rd;
5647
5648         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5649                 return -EINVAL;
5650
5651         if (!info->attrs[NL80211_ATTR_REG_RULES])
5652                 return -EINVAL;
5653
5654         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5655
5656         if (info->attrs[NL80211_ATTR_DFS_REGION])
5657                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5658
5659         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5660                             rem_reg_rules) {
5661                 num_rules++;
5662                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5663                         return -EINVAL;
5664         }
5665
5666         if (!reg_is_valid_request(alpha2))
5667                 return -EINVAL;
5668
5669         size_of_regd = sizeof(struct ieee80211_regdomain) +
5670                        num_rules * sizeof(struct ieee80211_reg_rule);
5671
5672         rd = kzalloc(size_of_regd, GFP_KERNEL);
5673         if (!rd)
5674                 return -ENOMEM;
5675
5676         rd->n_reg_rules = num_rules;
5677         rd->alpha2[0] = alpha2[0];
5678         rd->alpha2[1] = alpha2[1];
5679
5680         /*
5681          * Disable DFS master mode if the DFS region was
5682          * not supported or known on this kernel.
5683          */
5684         if (reg_supported_dfs_region(dfs_region))
5685                 rd->dfs_region = dfs_region;
5686
5687         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5688                             rem_reg_rules) {
5689                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5690                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5691                               reg_rule_policy);
5692                 if (r)
5693                         goto bad_reg;
5694                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5695                 if (r)
5696                         goto bad_reg;
5697
5698                 rule_idx++;
5699
5700                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5701                         r = -EINVAL;
5702                         goto bad_reg;
5703                 }
5704         }
5705
5706         r = set_regdom(rd, REGD_SOURCE_CRDA);
5707         /* set_regdom took ownership */
5708         rd = NULL;
5709
5710  bad_reg:
5711         kfree(rd);
5712         return r;
5713 }
5714 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5715
5716 static int validate_scan_freqs(struct nlattr *freqs)
5717 {
5718         struct nlattr *attr1, *attr2;
5719         int n_channels = 0, tmp1, tmp2;
5720
5721         nla_for_each_nested(attr1, freqs, tmp1) {
5722                 n_channels++;
5723                 /*
5724                  * Some hardware has a limited channel list for
5725                  * scanning, and it is pretty much nonsensical
5726                  * to scan for a channel twice, so disallow that
5727                  * and don't require drivers to check that the
5728                  * channel list they get isn't longer than what
5729                  * they can scan, as long as they can scan all
5730                  * the channels they registered at once.
5731                  */
5732                 nla_for_each_nested(attr2, freqs, tmp2)
5733                         if (attr1 != attr2 &&
5734                             nla_get_u32(attr1) == nla_get_u32(attr2))
5735                                 return 0;
5736         }
5737
5738         return n_channels;
5739 }
5740
5741 static int nl80211_parse_random_mac(struct nlattr **attrs,
5742                                     u8 *mac_addr, u8 *mac_addr_mask)
5743 {
5744         int i;
5745
5746         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5747                 eth_zero_addr(mac_addr);
5748                 eth_zero_addr(mac_addr_mask);
5749                 mac_addr[0] = 0x2;
5750                 mac_addr_mask[0] = 0x3;
5751
5752                 return 0;
5753         }
5754
5755         /* need both or none */
5756         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5757                 return -EINVAL;
5758
5759         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5760         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5761
5762         /* don't allow or configure an mcast address */
5763         if (!is_multicast_ether_addr(mac_addr_mask) ||
5764             is_multicast_ether_addr(mac_addr))
5765                 return -EINVAL;
5766
5767         /*
5768          * allow users to pass a MAC address that has bits set outside
5769          * of the mask, but don't bother drivers with having to deal
5770          * with such bits
5771          */
5772         for (i = 0; i < ETH_ALEN; i++)
5773                 mac_addr[i] &= mac_addr_mask[i];
5774
5775         return 0;
5776 }
5777
5778 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5779 {
5780         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5781         struct wireless_dev *wdev = info->user_ptr[1];
5782         struct cfg80211_scan_request *request;
5783         struct nlattr *attr;
5784         struct wiphy *wiphy;
5785         int err, tmp, n_ssids = 0, n_channels, i;
5786         size_t ie_len;
5787
5788         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5789                 return -EINVAL;
5790
5791         wiphy = &rdev->wiphy;
5792
5793         if (!rdev->ops->scan)
5794                 return -EOPNOTSUPP;
5795
5796         if (rdev->scan_req || rdev->scan_msg) {
5797                 err = -EBUSY;
5798                 goto unlock;
5799         }
5800
5801         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5802                 n_channels = validate_scan_freqs(
5803                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5804                 if (!n_channels) {
5805                         err = -EINVAL;
5806                         goto unlock;
5807                 }
5808         } else {
5809                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5810         }
5811
5812         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5813                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5814                         n_ssids++;
5815
5816         if (n_ssids > wiphy->max_scan_ssids) {
5817                 err = -EINVAL;
5818                 goto unlock;
5819         }
5820
5821         if (info->attrs[NL80211_ATTR_IE])
5822                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5823         else
5824                 ie_len = 0;
5825
5826         if (ie_len > wiphy->max_scan_ie_len) {
5827                 err = -EINVAL;
5828                 goto unlock;
5829         }
5830
5831         request = kzalloc(sizeof(*request)
5832                         + sizeof(*request->ssids) * n_ssids
5833                         + sizeof(*request->channels) * n_channels
5834                         + ie_len, GFP_KERNEL);
5835         if (!request) {
5836                 err = -ENOMEM;
5837                 goto unlock;
5838         }
5839
5840         if (n_ssids)
5841                 request->ssids = (void *)&request->channels[n_channels];
5842         request->n_ssids = n_ssids;
5843         if (ie_len) {
5844                 if (n_ssids)
5845                         request->ie = (void *)(request->ssids + n_ssids);
5846                 else
5847                         request->ie = (void *)(request->channels + n_channels);
5848         }
5849
5850         i = 0;
5851         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5852                 /* user specified, bail out if channel not found */
5853                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5854                         struct ieee80211_channel *chan;
5855
5856                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5857
5858                         if (!chan) {
5859                                 err = -EINVAL;
5860                                 goto out_free;
5861                         }
5862
5863                         /* ignore disabled channels */
5864                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5865                                 continue;
5866
5867                         request->channels[i] = chan;
5868                         i++;
5869                 }
5870         } else {
5871                 enum ieee80211_band band;
5872
5873                 /* all channels */
5874                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5875                         int j;
5876                         if (!wiphy->bands[band])
5877                                 continue;
5878                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5879                                 struct ieee80211_channel *chan;
5880
5881                                 chan = &wiphy->bands[band]->channels[j];
5882
5883                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5884                                         continue;
5885
5886                                 request->channels[i] = chan;
5887                                 i++;
5888                         }
5889                 }
5890         }
5891
5892         if (!i) {
5893                 err = -EINVAL;
5894                 goto out_free;
5895         }
5896
5897         request->n_channels = i;
5898
5899         i = 0;
5900         if (n_ssids) {
5901                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5902                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5903                                 err = -EINVAL;
5904                                 goto out_free;
5905                         }
5906                         request->ssids[i].ssid_len = nla_len(attr);
5907                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5908                         i++;
5909                 }
5910         }
5911
5912         if (info->attrs[NL80211_ATTR_IE]) {
5913                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5914                 memcpy((void *)request->ie,
5915                        nla_data(info->attrs[NL80211_ATTR_IE]),
5916                        request->ie_len);
5917         }
5918
5919         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5920                 if (wiphy->bands[i])
5921                         request->rates[i] =
5922                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5923
5924         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5925                 nla_for_each_nested(attr,
5926                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5927                                     tmp) {
5928                         enum ieee80211_band band = nla_type(attr);
5929
5930                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5931                                 err = -EINVAL;
5932                                 goto out_free;
5933                         }
5934
5935                         if (!wiphy->bands[band])
5936                                 continue;
5937
5938                         err = ieee80211_get_ratemask(wiphy->bands[band],
5939                                                      nla_data(attr),
5940                                                      nla_len(attr),
5941                                                      &request->rates[band]);
5942                         if (err)
5943                                 goto out_free;
5944                 }
5945         }
5946
5947         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5948                 request->flags = nla_get_u32(
5949                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5950                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5951                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5952                         err = -EOPNOTSUPP;
5953                         goto out_free;
5954                 }
5955
5956                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
5957                         if (!(wiphy->features &
5958                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
5959                                 err = -EOPNOTSUPP;
5960                                 goto out_free;
5961                         }
5962
5963                         if (wdev->current_bss) {
5964                                 err = -EOPNOTSUPP;
5965                                 goto out_free;
5966                         }
5967
5968                         err = nl80211_parse_random_mac(info->attrs,
5969                                                        request->mac_addr,
5970                                                        request->mac_addr_mask);
5971                         if (err)
5972                                 goto out_free;
5973                 }
5974         }
5975
5976         request->no_cck =
5977                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5978
5979         request->wdev = wdev;
5980         request->wiphy = &rdev->wiphy;
5981         request->scan_start = jiffies;
5982
5983         rdev->scan_req = request;
5984         err = rdev_scan(rdev, request);
5985
5986         if (!err) {
5987                 nl80211_send_scan_start(rdev, wdev);
5988                 if (wdev->netdev)
5989                         dev_hold(wdev->netdev);
5990         } else {
5991  out_free:
5992                 rdev->scan_req = NULL;
5993                 kfree(request);
5994         }
5995
5996  unlock:
5997         return err;
5998 }
5999
6000 static int
6001 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6002                                struct cfg80211_sched_scan_request *request,
6003                                struct nlattr **attrs)
6004 {
6005         int tmp, err, i = 0;
6006         struct nlattr *attr;
6007
6008         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6009                 u32 interval;
6010
6011                 /*
6012                  * If scan plans are not specified,
6013                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6014                  * case one scan plan will be set with the specified scan
6015                  * interval and infinite number of iterations.
6016                  */
6017                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6018                         return -EINVAL;
6019
6020                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6021                 if (!interval)
6022                         return -EINVAL;
6023
6024                 request->scan_plans[0].interval =
6025                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6026                 if (!request->scan_plans[0].interval)
6027                         return -EINVAL;
6028
6029                 if (request->scan_plans[0].interval >
6030                     wiphy->max_sched_scan_plan_interval)
6031                         request->scan_plans[0].interval =
6032                                 wiphy->max_sched_scan_plan_interval;
6033
6034                 return 0;
6035         }
6036
6037         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6038                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6039
6040                 if (WARN_ON(i >= n_plans))
6041                         return -EINVAL;
6042
6043                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6044                                 nla_data(attr), nla_len(attr),
6045                                 nl80211_plan_policy);
6046                 if (err)
6047                         return err;
6048
6049                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6050                         return -EINVAL;
6051
6052                 request->scan_plans[i].interval =
6053                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6054                 if (!request->scan_plans[i].interval ||
6055                     request->scan_plans[i].interval >
6056                     wiphy->max_sched_scan_plan_interval)
6057                         return -EINVAL;
6058
6059                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6060                         request->scan_plans[i].iterations =
6061                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6062                         if (!request->scan_plans[i].iterations ||
6063                             (request->scan_plans[i].iterations >
6064                              wiphy->max_sched_scan_plan_iterations))
6065                                 return -EINVAL;
6066                 } else if (i < n_plans - 1) {
6067                         /*
6068                          * All scan plans but the last one must specify
6069                          * a finite number of iterations
6070                          */
6071                         return -EINVAL;
6072                 }
6073
6074                 i++;
6075         }
6076
6077         /*
6078          * The last scan plan must not specify the number of
6079          * iterations, it is supposed to run infinitely
6080          */
6081         if (request->scan_plans[n_plans - 1].iterations)
6082                 return  -EINVAL;
6083
6084         return 0;
6085 }
6086
6087 static struct cfg80211_sched_scan_request *
6088 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6089                          struct nlattr **attrs)
6090 {
6091         struct cfg80211_sched_scan_request *request;
6092         struct nlattr *attr;
6093         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6094         enum ieee80211_band band;
6095         size_t ie_len;
6096         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6097         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6098
6099         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6100                 return ERR_PTR(-EINVAL);
6101
6102         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6103                 n_channels = validate_scan_freqs(
6104                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6105                 if (!n_channels)
6106                         return ERR_PTR(-EINVAL);
6107         } else {
6108                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6109         }
6110
6111         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6112                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6113                                     tmp)
6114                         n_ssids++;
6115
6116         if (n_ssids > wiphy->max_sched_scan_ssids)
6117                 return ERR_PTR(-EINVAL);
6118
6119         /*
6120          * First, count the number of 'real' matchsets. Due to an issue with
6121          * the old implementation, matchsets containing only the RSSI attribute
6122          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6123          * RSSI for all matchsets, rather than their own matchset for reporting
6124          * all APs with a strong RSSI. This is needed to be compatible with
6125          * older userspace that treated a matchset with only the RSSI as the
6126          * global RSSI for all other matchsets - if there are other matchsets.
6127          */
6128         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6129                 nla_for_each_nested(attr,
6130                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6131                                     tmp) {
6132                         struct nlattr *rssi;
6133
6134                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6135                                         nla_data(attr), nla_len(attr),
6136                                         nl80211_match_policy);
6137                         if (err)
6138                                 return ERR_PTR(err);
6139                         /* add other standalone attributes here */
6140                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6141                                 n_match_sets++;
6142                                 continue;
6143                         }
6144                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6145                         if (rssi)
6146                                 default_match_rssi = nla_get_s32(rssi);
6147                 }
6148         }
6149
6150         /* However, if there's no other matchset, add the RSSI one */
6151         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6152                 n_match_sets = 1;
6153
6154         if (n_match_sets > wiphy->max_match_sets)
6155                 return ERR_PTR(-EINVAL);
6156
6157         if (attrs[NL80211_ATTR_IE])
6158                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6159         else
6160                 ie_len = 0;
6161
6162         if (ie_len > wiphy->max_sched_scan_ie_len)
6163                 return ERR_PTR(-EINVAL);
6164
6165         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6166                 /*
6167                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6168                  * each scan plan already specifies its own interval
6169                  */
6170                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6171                         return ERR_PTR(-EINVAL);
6172
6173                 nla_for_each_nested(attr,
6174                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6175                         n_plans++;
6176         } else {
6177                 /*
6178                  * The scan interval attribute is kept for backward
6179                  * compatibility. If no scan plans are specified and sched scan
6180                  * interval is specified, one scan plan will be set with this
6181                  * scan interval and infinite number of iterations.
6182                  */
6183                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6184                         return ERR_PTR(-EINVAL);
6185
6186                 n_plans = 1;
6187         }
6188
6189         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6190                 return ERR_PTR(-EINVAL);
6191
6192         request = kzalloc(sizeof(*request)
6193                         + sizeof(*request->ssids) * n_ssids
6194                         + sizeof(*request->match_sets) * n_match_sets
6195                         + sizeof(*request->scan_plans) * n_plans
6196                         + sizeof(*request->channels) * n_channels
6197                         + ie_len, GFP_KERNEL);
6198         if (!request)
6199                 return ERR_PTR(-ENOMEM);
6200
6201         if (n_ssids)
6202                 request->ssids = (void *)&request->channels[n_channels];
6203         request->n_ssids = n_ssids;
6204         if (ie_len) {
6205                 if (n_ssids)
6206                         request->ie = (void *)(request->ssids + n_ssids);
6207                 else
6208                         request->ie = (void *)(request->channels + n_channels);
6209         }
6210
6211         if (n_match_sets) {
6212                 if (request->ie)
6213                         request->match_sets = (void *)(request->ie + ie_len);
6214                 else if (n_ssids)
6215                         request->match_sets =
6216                                 (void *)(request->ssids + n_ssids);
6217                 else
6218                         request->match_sets =
6219                                 (void *)(request->channels + n_channels);
6220         }
6221         request->n_match_sets = n_match_sets;
6222
6223         if (n_match_sets)
6224                 request->scan_plans = (void *)(request->match_sets +
6225                                                n_match_sets);
6226         else if (request->ie)
6227                 request->scan_plans = (void *)(request->ie + ie_len);
6228         else if (n_ssids)
6229                 request->scan_plans = (void *)(request->ssids + n_ssids);
6230         else
6231                 request->scan_plans = (void *)(request->channels + n_channels);
6232
6233         request->n_scan_plans = n_plans;
6234
6235         i = 0;
6236         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6237                 /* user specified, bail out if channel not found */
6238                 nla_for_each_nested(attr,
6239                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6240                                     tmp) {
6241                         struct ieee80211_channel *chan;
6242
6243                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6244
6245                         if (!chan) {
6246                                 err = -EINVAL;
6247                                 goto out_free;
6248                         }
6249
6250                         /* ignore disabled channels */
6251                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6252                                 continue;
6253
6254                         request->channels[i] = chan;
6255                         i++;
6256                 }
6257         } else {
6258                 /* all channels */
6259                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6260                         int j;
6261                         if (!wiphy->bands[band])
6262                                 continue;
6263                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6264                                 struct ieee80211_channel *chan;
6265
6266                                 chan = &wiphy->bands[band]->channels[j];
6267
6268                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6269                                         continue;
6270
6271                                 request->channels[i] = chan;
6272                                 i++;
6273                         }
6274                 }
6275         }
6276
6277         if (!i) {
6278                 err = -EINVAL;
6279                 goto out_free;
6280         }
6281
6282         request->n_channels = i;
6283
6284         i = 0;
6285         if (n_ssids) {
6286                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6287                                     tmp) {
6288                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6289                                 err = -EINVAL;
6290                                 goto out_free;
6291                         }
6292                         request->ssids[i].ssid_len = nla_len(attr);
6293                         memcpy(request->ssids[i].ssid, nla_data(attr),
6294                                nla_len(attr));
6295                         i++;
6296                 }
6297         }
6298
6299         i = 0;
6300         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6301                 nla_for_each_nested(attr,
6302                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6303                                     tmp) {
6304                         struct nlattr *ssid, *rssi;
6305
6306                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6307                                         nla_data(attr), nla_len(attr),
6308                                         nl80211_match_policy);
6309                         if (err)
6310                                 goto out_free;
6311                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6312                         if (ssid) {
6313                                 if (WARN_ON(i >= n_match_sets)) {
6314                                         /* this indicates a programming error,
6315                                          * the loop above should have verified
6316                                          * things properly
6317                                          */
6318                                         err = -EINVAL;
6319                                         goto out_free;
6320                                 }
6321
6322                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6323                                         err = -EINVAL;
6324                                         goto out_free;
6325                                 }
6326                                 memcpy(request->match_sets[i].ssid.ssid,
6327                                        nla_data(ssid), nla_len(ssid));
6328                                 request->match_sets[i].ssid.ssid_len =
6329                                         nla_len(ssid);
6330                                 /* special attribute - old implemenation w/a */
6331                                 request->match_sets[i].rssi_thold =
6332                                         default_match_rssi;
6333                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6334                                 if (rssi)
6335                                         request->match_sets[i].rssi_thold =
6336                                                 nla_get_s32(rssi);
6337                         }
6338                         i++;
6339                 }
6340
6341                 /* there was no other matchset, so the RSSI one is alone */
6342                 if (i == 0 && n_match_sets)
6343                         request->match_sets[0].rssi_thold = default_match_rssi;
6344
6345                 request->min_rssi_thold = INT_MAX;
6346                 for (i = 0; i < n_match_sets; i++)
6347                         request->min_rssi_thold =
6348                                 min(request->match_sets[i].rssi_thold,
6349                                     request->min_rssi_thold);
6350         } else {
6351                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6352         }
6353
6354         if (ie_len) {
6355                 request->ie_len = ie_len;
6356                 memcpy((void *)request->ie,
6357                        nla_data(attrs[NL80211_ATTR_IE]),
6358                        request->ie_len);
6359         }
6360
6361         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6362                 request->flags = nla_get_u32(
6363                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6364                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6365                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6366                         err = -EOPNOTSUPP;
6367                         goto out_free;
6368                 }
6369
6370                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6371                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6372
6373                         if (!wdev) /* must be net-detect */
6374                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6375
6376                         if (!(wiphy->features & flg)) {
6377                                 err = -EOPNOTSUPP;
6378                                 goto out_free;
6379                         }
6380
6381                         if (wdev && wdev->current_bss) {
6382                                 err = -EOPNOTSUPP;
6383                                 goto out_free;
6384                         }
6385
6386                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6387                                                        request->mac_addr_mask);
6388                         if (err)
6389                                 goto out_free;
6390                 }
6391         }
6392
6393         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6394                 request->delay =
6395                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6396
6397         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6398         if (err)
6399                 goto out_free;
6400
6401         request->scan_start = jiffies;
6402
6403         return request;
6404
6405 out_free:
6406         kfree(request);
6407         return ERR_PTR(err);
6408 }
6409
6410 static int nl80211_start_sched_scan(struct sk_buff *skb,
6411                                     struct genl_info *info)
6412 {
6413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6414         struct net_device *dev = info->user_ptr[1];
6415         struct wireless_dev *wdev = dev->ieee80211_ptr;
6416         struct cfg80211_sched_scan_request *sched_scan_req;
6417         int err;
6418
6419         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6420             !rdev->ops->sched_scan_start)
6421                 return -EOPNOTSUPP;
6422
6423         if (rdev->sched_scan_req)
6424                 return -EINPROGRESS;
6425
6426         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6427                                                   info->attrs);
6428
6429         err = PTR_ERR_OR_ZERO(sched_scan_req);
6430         if (err)
6431                 goto out_err;
6432
6433         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6434         if (err)
6435                 goto out_free;
6436
6437         sched_scan_req->dev = dev;
6438         sched_scan_req->wiphy = &rdev->wiphy;
6439
6440         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6441                 sched_scan_req->owner_nlportid = info->snd_portid;
6442
6443         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6444
6445         nl80211_send_sched_scan(rdev, dev,
6446                                 NL80211_CMD_START_SCHED_SCAN);
6447         return 0;
6448
6449 out_free:
6450         kfree(sched_scan_req);
6451 out_err:
6452         return err;
6453 }
6454
6455 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6456                                    struct genl_info *info)
6457 {
6458         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6459
6460         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6461             !rdev->ops->sched_scan_stop)
6462                 return -EOPNOTSUPP;
6463
6464         return __cfg80211_stop_sched_scan(rdev, false);
6465 }
6466
6467 static int nl80211_start_radar_detection(struct sk_buff *skb,
6468                                          struct genl_info *info)
6469 {
6470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6471         struct net_device *dev = info->user_ptr[1];
6472         struct wireless_dev *wdev = dev->ieee80211_ptr;
6473         struct cfg80211_chan_def chandef;
6474         enum nl80211_dfs_regions dfs_region;
6475         unsigned int cac_time_ms;
6476         int err;
6477
6478         dfs_region = reg_get_dfs_region(wdev->wiphy);
6479         if (dfs_region == NL80211_DFS_UNSET)
6480                 return -EINVAL;
6481
6482         err = nl80211_parse_chandef(rdev, info, &chandef);
6483         if (err)
6484                 return err;
6485
6486         if (netif_carrier_ok(dev))
6487                 return -EBUSY;
6488
6489         if (wdev->cac_started)
6490                 return -EBUSY;
6491
6492         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6493                                             wdev->iftype);
6494         if (err < 0)
6495                 return err;
6496
6497         if (err == 0)
6498                 return -EINVAL;
6499
6500         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6501                 return -EINVAL;
6502
6503         if (!rdev->ops->start_radar_detection)
6504                 return -EOPNOTSUPP;
6505
6506         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6507         if (WARN_ON(!cac_time_ms))
6508                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6509
6510         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
6511                                                cac_time_ms);
6512         if (!err) {
6513                 wdev->chandef = chandef;
6514                 wdev->cac_started = true;
6515                 wdev->cac_start_time = jiffies;
6516                 wdev->cac_time_ms = cac_time_ms;
6517         }
6518         return err;
6519 }
6520
6521 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6522 {
6523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6524         struct net_device *dev = info->user_ptr[1];
6525         struct wireless_dev *wdev = dev->ieee80211_ptr;
6526         struct cfg80211_csa_settings params;
6527         /* csa_attrs is defined static to avoid waste of stack size - this
6528          * function is called under RTNL lock, so this should not be a problem.
6529          */
6530         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6531         int err;
6532         bool need_new_beacon = false;
6533         int len, i;
6534         u32 cs_count;
6535
6536         if (!rdev->ops->channel_switch ||
6537             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6538                 return -EOPNOTSUPP;
6539
6540         switch (dev->ieee80211_ptr->iftype) {
6541         case NL80211_IFTYPE_AP:
6542         case NL80211_IFTYPE_P2P_GO:
6543                 need_new_beacon = true;
6544
6545                 /* useless if AP is not running */
6546                 if (!wdev->beacon_interval)
6547                         return -ENOTCONN;
6548                 break;
6549         case NL80211_IFTYPE_ADHOC:
6550                 if (!wdev->ssid_len)
6551                         return -ENOTCONN;
6552                 break;
6553         case NL80211_IFTYPE_MESH_POINT:
6554                 if (!wdev->mesh_id_len)
6555                         return -ENOTCONN;
6556                 break;
6557         default:
6558                 return -EOPNOTSUPP;
6559         }
6560
6561         memset(&params, 0, sizeof(params));
6562
6563         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6564             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6565                 return -EINVAL;
6566
6567         /* only important for AP, IBSS and mesh create IEs internally */
6568         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6569                 return -EINVAL;
6570
6571         /* Even though the attribute is u32, the specification says
6572          * u8, so let's make sure we don't overflow.
6573          */
6574         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6575         if (cs_count > 255)
6576                 return -EINVAL;
6577
6578         params.count = cs_count;
6579
6580         if (!need_new_beacon)
6581                 goto skip_beacons;
6582
6583         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6584         if (err)
6585                 return err;
6586
6587         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6588                                info->attrs[NL80211_ATTR_CSA_IES],
6589                                nl80211_policy);
6590         if (err)
6591                 return err;
6592
6593         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6594         if (err)
6595                 return err;
6596
6597         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6598                 return -EINVAL;
6599
6600         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6601         if (!len || (len % sizeof(u16)))
6602                 return -EINVAL;
6603
6604         params.n_counter_offsets_beacon = len / sizeof(u16);
6605         if (rdev->wiphy.max_num_csa_counters &&
6606             (params.n_counter_offsets_beacon >
6607              rdev->wiphy.max_num_csa_counters))
6608                 return -EINVAL;
6609
6610         params.counter_offsets_beacon =
6611                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6612
6613         /* sanity checks - counters should fit and be the same */
6614         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6615                 u16 offset = params.counter_offsets_beacon[i];
6616
6617                 if (offset >= params.beacon_csa.tail_len)
6618                         return -EINVAL;
6619
6620                 if (params.beacon_csa.tail[offset] != params.count)
6621                         return -EINVAL;
6622         }
6623
6624         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6625                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6626                 if (!len || (len % sizeof(u16)))
6627                         return -EINVAL;
6628
6629                 params.n_counter_offsets_presp = len / sizeof(u16);
6630                 if (rdev->wiphy.max_num_csa_counters &&
6631                     (params.n_counter_offsets_beacon >
6632                      rdev->wiphy.max_num_csa_counters))
6633                         return -EINVAL;
6634
6635                 params.counter_offsets_presp =
6636                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6637
6638                 /* sanity checks - counters should fit and be the same */
6639                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6640                         u16 offset = params.counter_offsets_presp[i];
6641
6642                         if (offset >= params.beacon_csa.probe_resp_len)
6643                                 return -EINVAL;
6644
6645                         if (params.beacon_csa.probe_resp[offset] !=
6646                             params.count)
6647                                 return -EINVAL;
6648                 }
6649         }
6650
6651 skip_beacons:
6652         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6653         if (err)
6654                 return err;
6655
6656         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6657                                            wdev->iftype))
6658                 return -EINVAL;
6659
6660         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6661                                             &params.chandef,
6662                                             wdev->iftype);
6663         if (err < 0)
6664                 return err;
6665
6666         if (err > 0)
6667                 params.radar_required = true;
6668
6669         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6670                 params.block_tx = true;
6671
6672         wdev_lock(wdev);
6673         err = rdev_channel_switch(rdev, dev, &params);
6674         wdev_unlock(wdev);
6675
6676         return err;
6677 }
6678
6679 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6680                             u32 seq, int flags,
6681                             struct cfg80211_registered_device *rdev,
6682                             struct wireless_dev *wdev,
6683                             struct cfg80211_internal_bss *intbss)
6684 {
6685         struct cfg80211_bss *res = &intbss->pub;
6686         const struct cfg80211_bss_ies *ies;
6687         void *hdr;
6688         struct nlattr *bss;
6689
6690         ASSERT_WDEV_LOCK(wdev);
6691
6692         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6693                              NL80211_CMD_NEW_SCAN_RESULTS);
6694         if (!hdr)
6695                 return -1;
6696
6697         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6698
6699         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6700                 goto nla_put_failure;
6701         if (wdev->netdev &&
6702             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6703                 goto nla_put_failure;
6704         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6705                 goto nla_put_failure;
6706
6707         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6708         if (!bss)
6709                 goto nla_put_failure;
6710         if ((!is_zero_ether_addr(res->bssid) &&
6711              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6712                 goto nla_put_failure;
6713
6714         rcu_read_lock();
6715         /* indicate whether we have probe response data or not */
6716         if (rcu_access_pointer(res->proberesp_ies) &&
6717             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6718                 goto fail_unlock_rcu;
6719
6720         /* this pointer prefers to be pointed to probe response data
6721          * but is always valid
6722          */
6723         ies = rcu_dereference(res->ies);
6724         if (ies) {
6725                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6726                         goto fail_unlock_rcu;
6727                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6728                                         ies->len, ies->data))
6729                         goto fail_unlock_rcu;
6730         }
6731
6732         /* and this pointer is always (unless driver didn't know) beacon data */
6733         ies = rcu_dereference(res->beacon_ies);
6734         if (ies && ies->from_beacon) {
6735                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6736                         goto fail_unlock_rcu;
6737                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6738                                         ies->len, ies->data))
6739                         goto fail_unlock_rcu;
6740         }
6741         rcu_read_unlock();
6742
6743         if (res->beacon_interval &&
6744             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6745                 goto nla_put_failure;
6746         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6747             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6748             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6749             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6750                         jiffies_to_msecs(jiffies - intbss->ts)))
6751                 goto nla_put_failure;
6752
6753         if (intbss->ts_boottime &&
6754             nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6755                         intbss->ts_boottime))
6756                 goto nla_put_failure;
6757
6758         switch (rdev->wiphy.signal_type) {
6759         case CFG80211_SIGNAL_TYPE_MBM:
6760                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6761                         goto nla_put_failure;
6762                 break;
6763         case CFG80211_SIGNAL_TYPE_UNSPEC:
6764                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6765                         goto nla_put_failure;
6766                 break;
6767         default:
6768                 break;
6769         }
6770
6771         switch (wdev->iftype) {
6772         case NL80211_IFTYPE_P2P_CLIENT:
6773         case NL80211_IFTYPE_STATION:
6774                 if (intbss == wdev->current_bss &&
6775                     nla_put_u32(msg, NL80211_BSS_STATUS,
6776                                 NL80211_BSS_STATUS_ASSOCIATED))
6777                         goto nla_put_failure;
6778                 break;
6779         case NL80211_IFTYPE_ADHOC:
6780                 if (intbss == wdev->current_bss &&
6781                     nla_put_u32(msg, NL80211_BSS_STATUS,
6782                                 NL80211_BSS_STATUS_IBSS_JOINED))
6783                         goto nla_put_failure;
6784                 break;
6785         default:
6786                 break;
6787         }
6788
6789         nla_nest_end(msg, bss);
6790
6791         genlmsg_end(msg, hdr);
6792         return 0;
6793
6794  fail_unlock_rcu:
6795         rcu_read_unlock();
6796  nla_put_failure:
6797         genlmsg_cancel(msg, hdr);
6798         return -EMSGSIZE;
6799 }
6800
6801 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6802 {
6803         struct cfg80211_registered_device *rdev;
6804         struct cfg80211_internal_bss *scan;
6805         struct wireless_dev *wdev;
6806         int start = cb->args[2], idx = 0;
6807         int err;
6808
6809         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6810         if (err)
6811                 return err;
6812
6813         wdev_lock(wdev);
6814         spin_lock_bh(&rdev->bss_lock);
6815         cfg80211_bss_expire(rdev);
6816
6817         cb->seq = rdev->bss_generation;
6818
6819         list_for_each_entry(scan, &rdev->bss_list, list) {
6820                 if (++idx <= start)
6821                         continue;
6822                 if (nl80211_send_bss(skb, cb,
6823                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6824                                 rdev, wdev, scan) < 0) {
6825                         idx--;
6826                         break;
6827                 }
6828         }
6829
6830         spin_unlock_bh(&rdev->bss_lock);
6831         wdev_unlock(wdev);
6832
6833         cb->args[2] = idx;
6834         nl80211_finish_wdev_dump(rdev);
6835
6836         return skb->len;
6837 }
6838
6839 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6840                                int flags, struct net_device *dev,
6841                                bool allow_radio_stats,
6842                                struct survey_info *survey)
6843 {
6844         void *hdr;
6845         struct nlattr *infoattr;
6846
6847         /* skip radio stats if userspace didn't request them */
6848         if (!survey->channel && !allow_radio_stats)
6849                 return 0;
6850
6851         hdr = nl80211hdr_put(msg, portid, seq, flags,
6852                              NL80211_CMD_NEW_SURVEY_RESULTS);
6853         if (!hdr)
6854                 return -ENOMEM;
6855
6856         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6857                 goto nla_put_failure;
6858
6859         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6860         if (!infoattr)
6861                 goto nla_put_failure;
6862
6863         if (survey->channel &&
6864             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6865                         survey->channel->center_freq))
6866                 goto nla_put_failure;
6867
6868         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6869             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6870                 goto nla_put_failure;
6871         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6872             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6873                 goto nla_put_failure;
6874         if ((survey->filled & SURVEY_INFO_TIME) &&
6875             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME,
6876                         survey->time))
6877                 goto nla_put_failure;
6878         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
6879             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_BUSY,
6880                         survey->time_busy))
6881                 goto nla_put_failure;
6882         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
6883             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
6884                         survey->time_ext_busy))
6885                 goto nla_put_failure;
6886         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
6887             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_RX,
6888                         survey->time_rx))
6889                 goto nla_put_failure;
6890         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
6891             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_TX,
6892                         survey->time_tx))
6893                 goto nla_put_failure;
6894         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
6895             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_SCAN,
6896                         survey->time_scan))
6897                 goto nla_put_failure;
6898
6899         nla_nest_end(msg, infoattr);
6900
6901         genlmsg_end(msg, hdr);
6902         return 0;
6903
6904  nla_put_failure:
6905         genlmsg_cancel(msg, hdr);
6906         return -EMSGSIZE;
6907 }
6908
6909 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
6910 {
6911         struct survey_info survey;
6912         struct cfg80211_registered_device *rdev;
6913         struct wireless_dev *wdev;
6914         int survey_idx = cb->args[2];
6915         int res;
6916         bool radio_stats;
6917
6918         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6919         if (res)
6920                 return res;
6921
6922         /* prepare_wdev_dump parsed the attributes */
6923         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
6924
6925         if (!wdev->netdev) {
6926                 res = -EINVAL;
6927                 goto out_err;
6928         }
6929
6930         if (!rdev->ops->dump_survey) {
6931                 res = -EOPNOTSUPP;
6932                 goto out_err;
6933         }
6934
6935         while (1) {
6936                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6937                 if (res == -ENOENT)
6938                         break;
6939                 if (res)
6940                         goto out_err;
6941
6942                 /* don't send disabled channels, but do send non-channel data */
6943                 if (survey.channel &&
6944                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
6945                         survey_idx++;
6946                         continue;
6947                 }
6948
6949                 if (nl80211_send_survey(skb,
6950                                 NETLINK_CB(cb->skb).portid,
6951                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6952                                 wdev->netdev, radio_stats, &survey) < 0)
6953                         goto out;
6954                 survey_idx++;
6955         }
6956
6957  out:
6958         cb->args[2] = survey_idx;
6959         res = skb->len;
6960  out_err:
6961         nl80211_finish_wdev_dump(rdev);
6962         return res;
6963 }
6964
6965 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6966 {
6967         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6968                                   NL80211_WPA_VERSION_2));
6969 }
6970
6971 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6972 {
6973         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6974         struct net_device *dev = info->user_ptr[1];
6975         struct ieee80211_channel *chan;
6976         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6977         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6978         enum nl80211_auth_type auth_type;
6979         struct key_parse key;
6980         bool local_state_change;
6981
6982         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6983                 return -EINVAL;
6984
6985         if (!info->attrs[NL80211_ATTR_MAC])
6986                 return -EINVAL;
6987
6988         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6989                 return -EINVAL;
6990
6991         if (!info->attrs[NL80211_ATTR_SSID])
6992                 return -EINVAL;
6993
6994         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6995                 return -EINVAL;
6996
6997         err = nl80211_parse_key(info, &key);
6998         if (err)
6999                 return err;
7000
7001         if (key.idx >= 0) {
7002                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7003                         return -EINVAL;
7004                 if (!key.p.key || !key.p.key_len)
7005                         return -EINVAL;
7006                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7007                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7008                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7009                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7010                         return -EINVAL;
7011                 if (key.idx > 4)
7012                         return -EINVAL;
7013         } else {
7014                 key.p.key_len = 0;
7015                 key.p.key = NULL;
7016         }
7017
7018         if (key.idx >= 0) {
7019                 int i;
7020                 bool ok = false;
7021                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7022                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7023                                 ok = true;
7024                                 break;
7025                         }
7026                 }
7027                 if (!ok)
7028                         return -EINVAL;
7029         }
7030
7031         if (!rdev->ops->auth)
7032                 return -EOPNOTSUPP;
7033
7034         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7035             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7036                 return -EOPNOTSUPP;
7037
7038         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7039         chan = nl80211_get_valid_chan(&rdev->wiphy,
7040                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7041         if (!chan)
7042                 return -EINVAL;
7043
7044         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7045         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7046
7047         if (info->attrs[NL80211_ATTR_IE]) {
7048                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7049                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7050         }
7051
7052         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7053         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7054                 return -EINVAL;
7055
7056         if (auth_type == NL80211_AUTHTYPE_SAE &&
7057             !info->attrs[NL80211_ATTR_SAE_DATA])
7058                 return -EINVAL;
7059
7060         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7061                 if (auth_type != NL80211_AUTHTYPE_SAE)
7062                         return -EINVAL;
7063                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7064                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7065                 /* need to include at least Auth Transaction and Status Code */
7066                 if (sae_data_len < 4)
7067                         return -EINVAL;
7068         }
7069
7070         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7071
7072         /*
7073          * Since we no longer track auth state, ignore
7074          * requests to only change local state.
7075          */
7076         if (local_state_change)
7077                 return 0;
7078
7079         wdev_lock(dev->ieee80211_ptr);
7080         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7081                                  ssid, ssid_len, ie, ie_len,
7082                                  key.p.key, key.p.key_len, key.idx,
7083                                  sae_data, sae_data_len);
7084         wdev_unlock(dev->ieee80211_ptr);
7085         return err;
7086 }
7087
7088 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7089                                    struct genl_info *info,
7090                                    struct cfg80211_crypto_settings *settings,
7091                                    int cipher_limit)
7092 {
7093         memset(settings, 0, sizeof(*settings));
7094
7095         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7096
7097         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7098                 u16 proto;
7099                 proto = nla_get_u16(
7100                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7101                 settings->control_port_ethertype = cpu_to_be16(proto);
7102                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7103                     proto != ETH_P_PAE)
7104                         return -EINVAL;
7105                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7106                         settings->control_port_no_encrypt = true;
7107         } else
7108                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7109
7110         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7111                 void *data;
7112                 int len, i;
7113
7114                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7115                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7116                 settings->n_ciphers_pairwise = len / sizeof(u32);
7117
7118                 if (len % sizeof(u32))
7119                         return -EINVAL;
7120
7121                 if (settings->n_ciphers_pairwise > cipher_limit)
7122                         return -EINVAL;
7123
7124                 memcpy(settings->ciphers_pairwise, data, len);
7125
7126                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7127                         if (!cfg80211_supported_cipher_suite(
7128                                         &rdev->wiphy,
7129                                         settings->ciphers_pairwise[i]))
7130                                 return -EINVAL;
7131         }
7132
7133         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7134                 settings->cipher_group =
7135                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7136                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7137                                                      settings->cipher_group))
7138                         return -EINVAL;
7139         }
7140
7141         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7142                 settings->wpa_versions =
7143                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7144                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7145                         return -EINVAL;
7146         }
7147
7148         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7149                 void *data;
7150                 int len;
7151
7152                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7153                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7154                 settings->n_akm_suites = len / sizeof(u32);
7155
7156                 if (len % sizeof(u32))
7157                         return -EINVAL;
7158
7159                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7160                         return -EINVAL;
7161
7162                 memcpy(settings->akm_suites, data, len);
7163         }
7164
7165         return 0;
7166 }
7167
7168 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7169 {
7170         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7171         struct net_device *dev = info->user_ptr[1];
7172         struct ieee80211_channel *chan;
7173         struct cfg80211_assoc_request req = {};
7174         const u8 *bssid, *ssid;
7175         int err, ssid_len = 0;
7176
7177         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7178                 return -EINVAL;
7179
7180         if (!info->attrs[NL80211_ATTR_MAC] ||
7181             !info->attrs[NL80211_ATTR_SSID] ||
7182             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7183                 return -EINVAL;
7184
7185         if (!rdev->ops->assoc)
7186                 return -EOPNOTSUPP;
7187
7188         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7189             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7190                 return -EOPNOTSUPP;
7191
7192         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7193
7194         chan = nl80211_get_valid_chan(&rdev->wiphy,
7195                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7196         if (!chan)
7197                 return -EINVAL;
7198
7199         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7200         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7201
7202         if (info->attrs[NL80211_ATTR_IE]) {
7203                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7204                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7205         }
7206
7207         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7208                 enum nl80211_mfp mfp =
7209                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7210                 if (mfp == NL80211_MFP_REQUIRED)
7211                         req.use_mfp = true;
7212                 else if (mfp != NL80211_MFP_NO)
7213                         return -EINVAL;
7214         }
7215
7216         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7217                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7218
7219         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7220                 req.flags |= ASSOC_REQ_DISABLE_HT;
7221
7222         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7223                 memcpy(&req.ht_capa_mask,
7224                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7225                        sizeof(req.ht_capa_mask));
7226
7227         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7228                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7229                         return -EINVAL;
7230                 memcpy(&req.ht_capa,
7231                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7232                        sizeof(req.ht_capa));
7233         }
7234
7235         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7236                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7237
7238         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7239                 memcpy(&req.vht_capa_mask,
7240                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7241                        sizeof(req.vht_capa_mask));
7242
7243         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7244                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7245                         return -EINVAL;
7246                 memcpy(&req.vht_capa,
7247                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7248                        sizeof(req.vht_capa));
7249         }
7250
7251         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7252                 if (!(rdev->wiphy.features &
7253                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7254                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7255                         return -EINVAL;
7256                 req.flags |= ASSOC_REQ_USE_RRM;
7257         }
7258
7259         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7260         if (!err) {
7261                 wdev_lock(dev->ieee80211_ptr);
7262                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7263                                           ssid, ssid_len, &req);
7264                 wdev_unlock(dev->ieee80211_ptr);
7265         }
7266
7267         return err;
7268 }
7269
7270 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7271 {
7272         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7273         struct net_device *dev = info->user_ptr[1];
7274         const u8 *ie = NULL, *bssid;
7275         int ie_len = 0, err;
7276         u16 reason_code;
7277         bool local_state_change;
7278
7279         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7280                 return -EINVAL;
7281
7282         if (!info->attrs[NL80211_ATTR_MAC])
7283                 return -EINVAL;
7284
7285         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7286                 return -EINVAL;
7287
7288         if (!rdev->ops->deauth)
7289                 return -EOPNOTSUPP;
7290
7291         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7292             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7293                 return -EOPNOTSUPP;
7294
7295         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7296
7297         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7298         if (reason_code == 0) {
7299                 /* Reason Code 0 is reserved */
7300                 return -EINVAL;
7301         }
7302
7303         if (info->attrs[NL80211_ATTR_IE]) {
7304                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7305                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7306         }
7307
7308         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7309
7310         wdev_lock(dev->ieee80211_ptr);
7311         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7312                                    local_state_change);
7313         wdev_unlock(dev->ieee80211_ptr);
7314         return err;
7315 }
7316
7317 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7318 {
7319         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7320         struct net_device *dev = info->user_ptr[1];
7321         const u8 *ie = NULL, *bssid;
7322         int ie_len = 0, err;
7323         u16 reason_code;
7324         bool local_state_change;
7325
7326         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7327                 return -EINVAL;
7328
7329         if (!info->attrs[NL80211_ATTR_MAC])
7330                 return -EINVAL;
7331
7332         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7333                 return -EINVAL;
7334
7335         if (!rdev->ops->disassoc)
7336                 return -EOPNOTSUPP;
7337
7338         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7339             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7340                 return -EOPNOTSUPP;
7341
7342         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7343
7344         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7345         if (reason_code == 0) {
7346                 /* Reason Code 0 is reserved */
7347                 return -EINVAL;
7348         }
7349
7350         if (info->attrs[NL80211_ATTR_IE]) {
7351                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7352                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7353         }
7354
7355         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7356
7357         wdev_lock(dev->ieee80211_ptr);
7358         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7359                                      local_state_change);
7360         wdev_unlock(dev->ieee80211_ptr);
7361         return err;
7362 }
7363
7364 static bool
7365 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7366                          int mcast_rate[IEEE80211_NUM_BANDS],
7367                          int rateval)
7368 {
7369         struct wiphy *wiphy = &rdev->wiphy;
7370         bool found = false;
7371         int band, i;
7372
7373         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7374                 struct ieee80211_supported_band *sband;
7375
7376                 sband = wiphy->bands[band];
7377                 if (!sband)
7378                         continue;
7379
7380                 for (i = 0; i < sband->n_bitrates; i++) {
7381                         if (sband->bitrates[i].bitrate == rateval) {
7382                                 mcast_rate[band] = i + 1;
7383                                 found = true;
7384                                 break;
7385                         }
7386                 }
7387         }
7388
7389         return found;
7390 }
7391
7392 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7393 {
7394         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7395         struct net_device *dev = info->user_ptr[1];
7396         struct cfg80211_ibss_params ibss;
7397         struct wiphy *wiphy;
7398         struct cfg80211_cached_keys *connkeys = NULL;
7399         int err;
7400
7401         memset(&ibss, 0, sizeof(ibss));
7402
7403         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7404                 return -EINVAL;
7405
7406         if (!info->attrs[NL80211_ATTR_SSID] ||
7407             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7408                 return -EINVAL;
7409
7410         ibss.beacon_interval = 100;
7411
7412         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7413                 ibss.beacon_interval =
7414                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7415                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7416                         return -EINVAL;
7417         }
7418
7419         if (!rdev->ops->join_ibss)
7420                 return -EOPNOTSUPP;
7421
7422         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7423                 return -EOPNOTSUPP;
7424
7425         wiphy = &rdev->wiphy;
7426
7427         if (info->attrs[NL80211_ATTR_MAC]) {
7428                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7429
7430                 if (!is_valid_ether_addr(ibss.bssid))
7431                         return -EINVAL;
7432         }
7433         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7434         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7435
7436         if (info->attrs[NL80211_ATTR_IE]) {
7437                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7438                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7439         }
7440
7441         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7442         if (err)
7443                 return err;
7444
7445         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7446                                      NL80211_IFTYPE_ADHOC))
7447                 return -EINVAL;
7448
7449         switch (ibss.chandef.width) {
7450         case NL80211_CHAN_WIDTH_5:
7451         case NL80211_CHAN_WIDTH_10:
7452         case NL80211_CHAN_WIDTH_20_NOHT:
7453                 break;
7454         case NL80211_CHAN_WIDTH_20:
7455         case NL80211_CHAN_WIDTH_40:
7456                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7457                         return -EINVAL;
7458                 break;
7459         case NL80211_CHAN_WIDTH_80:
7460         case NL80211_CHAN_WIDTH_80P80:
7461         case NL80211_CHAN_WIDTH_160:
7462                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7463                         return -EINVAL;
7464                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7465                                              NL80211_EXT_FEATURE_VHT_IBSS))
7466                         return -EINVAL;
7467                 break;
7468         default:
7469                 return -EINVAL;
7470         }
7471
7472         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7473         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7474
7475         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7476                 u8 *rates =
7477                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7478                 int n_rates =
7479                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7480                 struct ieee80211_supported_band *sband =
7481                         wiphy->bands[ibss.chandef.chan->band];
7482
7483                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7484                                              &ibss.basic_rates);
7485                 if (err)
7486                         return err;
7487         }
7488
7489         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7490                 memcpy(&ibss.ht_capa_mask,
7491                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7492                        sizeof(ibss.ht_capa_mask));
7493
7494         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7495                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7496                         return -EINVAL;
7497                 memcpy(&ibss.ht_capa,
7498                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7499                        sizeof(ibss.ht_capa));
7500         }
7501
7502         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7503             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7504                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7505                 return -EINVAL;
7506
7507         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7508                 bool no_ht = false;
7509
7510                 connkeys = nl80211_parse_connkeys(rdev,
7511                                           info->attrs[NL80211_ATTR_KEYS],
7512                                           &no_ht);
7513                 if (IS_ERR(connkeys))
7514                         return PTR_ERR(connkeys);
7515
7516                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7517                     no_ht) {
7518                         kfree(connkeys);
7519                         return -EINVAL;
7520                 }
7521         }
7522
7523         ibss.control_port =
7524                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7525
7526         ibss.userspace_handles_dfs =
7527                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7528
7529         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7530         if (err)
7531                 kzfree(connkeys);
7532         return err;
7533 }
7534
7535 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7536 {
7537         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7538         struct net_device *dev = info->user_ptr[1];
7539
7540         if (!rdev->ops->leave_ibss)
7541                 return -EOPNOTSUPP;
7542
7543         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7544                 return -EOPNOTSUPP;
7545
7546         return cfg80211_leave_ibss(rdev, dev, false);
7547 }
7548
7549 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7550 {
7551         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7552         struct net_device *dev = info->user_ptr[1];
7553         int mcast_rate[IEEE80211_NUM_BANDS];
7554         u32 nla_rate;
7555         int err;
7556
7557         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7558             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7559             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7560                 return -EOPNOTSUPP;
7561
7562         if (!rdev->ops->set_mcast_rate)
7563                 return -EOPNOTSUPP;
7564
7565         memset(mcast_rate, 0, sizeof(mcast_rate));
7566
7567         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7568                 return -EINVAL;
7569
7570         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7571         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7572                 return -EINVAL;
7573
7574         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
7575
7576         return err;
7577 }
7578
7579 static struct sk_buff *
7580 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7581                             struct wireless_dev *wdev, int approxlen,
7582                             u32 portid, u32 seq, enum nl80211_commands cmd,
7583                             enum nl80211_attrs attr,
7584                             const struct nl80211_vendor_cmd_info *info,
7585                             gfp_t gfp)
7586 {
7587         struct sk_buff *skb;
7588         void *hdr;
7589         struct nlattr *data;
7590
7591         skb = nlmsg_new(approxlen + 100, gfp);
7592         if (!skb)
7593                 return NULL;
7594
7595         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7596         if (!hdr) {
7597                 kfree_skb(skb);
7598                 return NULL;
7599         }
7600
7601         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7602                 goto nla_put_failure;
7603
7604         if (info) {
7605                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7606                                 info->vendor_id))
7607                         goto nla_put_failure;
7608                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7609                                 info->subcmd))
7610                         goto nla_put_failure;
7611         }
7612
7613         if (wdev) {
7614                 if (nla_put_u64(skb, NL80211_ATTR_WDEV,
7615                                 wdev_id(wdev)))
7616                         goto nla_put_failure;
7617                 if (wdev->netdev &&
7618                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7619                                 wdev->netdev->ifindex))
7620                         goto nla_put_failure;
7621         }
7622
7623         data = nla_nest_start(skb, attr);
7624
7625         ((void **)skb->cb)[0] = rdev;
7626         ((void **)skb->cb)[1] = hdr;
7627         ((void **)skb->cb)[2] = data;
7628
7629         return skb;
7630
7631  nla_put_failure:
7632         kfree_skb(skb);
7633         return NULL;
7634 }
7635
7636 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7637                                            struct wireless_dev *wdev,
7638                                            enum nl80211_commands cmd,
7639                                            enum nl80211_attrs attr,
7640                                            int vendor_event_idx,
7641                                            int approxlen, gfp_t gfp)
7642 {
7643         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7644         const struct nl80211_vendor_cmd_info *info;
7645
7646         switch (cmd) {
7647         case NL80211_CMD_TESTMODE:
7648                 if (WARN_ON(vendor_event_idx != -1))
7649                         return NULL;
7650                 info = NULL;
7651                 break;
7652         case NL80211_CMD_VENDOR:
7653                 if (WARN_ON(vendor_event_idx < 0 ||
7654                             vendor_event_idx >= wiphy->n_vendor_events))
7655                         return NULL;
7656                 info = &wiphy->vendor_events[vendor_event_idx];
7657                 break;
7658         default:
7659                 WARN_ON(1);
7660                 return NULL;
7661         }
7662
7663         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7664                                            cmd, attr, info, gfp);
7665 }
7666 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7667
7668 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7669 {
7670         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7671         void *hdr = ((void **)skb->cb)[1];
7672         struct nlattr *data = ((void **)skb->cb)[2];
7673         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7674
7675         /* clear CB data for netlink core to own from now on */
7676         memset(skb->cb, 0, sizeof(skb->cb));
7677
7678         nla_nest_end(skb, data);
7679         genlmsg_end(skb, hdr);
7680
7681         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7682                 mcgrp = NL80211_MCGRP_VENDOR;
7683
7684         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7685                                 mcgrp, gfp);
7686 }
7687 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7688
7689 #ifdef CONFIG_NL80211_TESTMODE
7690 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7691 {
7692         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7693         struct wireless_dev *wdev =
7694                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7695         int err;
7696
7697         if (!rdev->ops->testmode_cmd)
7698                 return -EOPNOTSUPP;
7699
7700         if (IS_ERR(wdev)) {
7701                 err = PTR_ERR(wdev);
7702                 if (err != -EINVAL)
7703                         return err;
7704                 wdev = NULL;
7705         } else if (wdev->wiphy != &rdev->wiphy) {
7706                 return -EINVAL;
7707         }
7708
7709         if (!info->attrs[NL80211_ATTR_TESTDATA])
7710                 return -EINVAL;
7711
7712         rdev->cur_cmd_info = info;
7713         err = rdev_testmode_cmd(rdev, wdev,
7714                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7715                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7716         rdev->cur_cmd_info = NULL;
7717
7718         return err;
7719 }
7720
7721 static int nl80211_testmode_dump(struct sk_buff *skb,
7722                                  struct netlink_callback *cb)
7723 {
7724         struct cfg80211_registered_device *rdev;
7725         int err;
7726         long phy_idx;
7727         void *data = NULL;
7728         int data_len = 0;
7729
7730         rtnl_lock();
7731
7732         if (cb->args[0]) {
7733                 /*
7734                  * 0 is a valid index, but not valid for args[0],
7735                  * so we need to offset by 1.
7736                  */
7737                 phy_idx = cb->args[0] - 1;
7738         } else {
7739                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7740                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7741                                   nl80211_policy);
7742                 if (err)
7743                         goto out_err;
7744
7745                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7746                                                   nl80211_fam.attrbuf);
7747                 if (IS_ERR(rdev)) {
7748                         err = PTR_ERR(rdev);
7749                         goto out_err;
7750                 }
7751                 phy_idx = rdev->wiphy_idx;
7752                 rdev = NULL;
7753
7754                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7755                         cb->args[1] =
7756                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7757         }
7758
7759         if (cb->args[1]) {
7760                 data = nla_data((void *)cb->args[1]);
7761                 data_len = nla_len((void *)cb->args[1]);
7762         }
7763
7764         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7765         if (!rdev) {
7766                 err = -ENOENT;
7767                 goto out_err;
7768         }
7769
7770         if (!rdev->ops->testmode_dump) {
7771                 err = -EOPNOTSUPP;
7772                 goto out_err;
7773         }
7774
7775         while (1) {
7776                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7777                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7778                                            NL80211_CMD_TESTMODE);
7779                 struct nlattr *tmdata;
7780
7781                 if (!hdr)
7782                         break;
7783
7784                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7785                         genlmsg_cancel(skb, hdr);
7786                         break;
7787                 }
7788
7789                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7790                 if (!tmdata) {
7791                         genlmsg_cancel(skb, hdr);
7792                         break;
7793                 }
7794                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7795                 nla_nest_end(skb, tmdata);
7796
7797                 if (err == -ENOBUFS || err == -ENOENT) {
7798                         genlmsg_cancel(skb, hdr);
7799                         break;
7800                 } else if (err) {
7801                         genlmsg_cancel(skb, hdr);
7802                         goto out_err;
7803                 }
7804
7805                 genlmsg_end(skb, hdr);
7806         }
7807
7808         err = skb->len;
7809         /* see above */
7810         cb->args[0] = phy_idx + 1;
7811  out_err:
7812         rtnl_unlock();
7813         return err;
7814 }
7815 #endif
7816
7817 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7818 {
7819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7820         struct net_device *dev = info->user_ptr[1];
7821         struct cfg80211_connect_params connect;
7822         struct wiphy *wiphy;
7823         struct cfg80211_cached_keys *connkeys = NULL;
7824         int err;
7825
7826         memset(&connect, 0, sizeof(connect));
7827
7828         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7829                 return -EINVAL;
7830
7831         if (!info->attrs[NL80211_ATTR_SSID] ||
7832             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7833                 return -EINVAL;
7834
7835         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7836                 connect.auth_type =
7837                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7838                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7839                                              NL80211_CMD_CONNECT))
7840                         return -EINVAL;
7841         } else
7842                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7843
7844         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7845
7846         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7847                                       NL80211_MAX_NR_CIPHER_SUITES);
7848         if (err)
7849                 return err;
7850
7851         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7852             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7853                 return -EOPNOTSUPP;
7854
7855         wiphy = &rdev->wiphy;
7856
7857         connect.bg_scan_period = -1;
7858         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7859                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7860                 connect.bg_scan_period =
7861                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7862         }
7863
7864         if (info->attrs[NL80211_ATTR_MAC])
7865                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7866         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7867                 connect.bssid_hint =
7868                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7869         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7870         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7871
7872         if (info->attrs[NL80211_ATTR_IE]) {
7873                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7874                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7875         }
7876
7877         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7878                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7879                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7880                     connect.mfp != NL80211_MFP_NO)
7881                         return -EINVAL;
7882         } else {
7883                 connect.mfp = NL80211_MFP_NO;
7884         }
7885
7886         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7887                 connect.channel = nl80211_get_valid_chan(
7888                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7889                 if (!connect.channel)
7890                         return -EINVAL;
7891         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7892                 connect.channel_hint = nl80211_get_valid_chan(
7893                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7894                 if (!connect.channel_hint)
7895                         return -EINVAL;
7896         }
7897
7898         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7899                 connkeys = nl80211_parse_connkeys(rdev,
7900                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7901                 if (IS_ERR(connkeys))
7902                         return PTR_ERR(connkeys);
7903         }
7904
7905         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7906                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7907
7908         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7909                 memcpy(&connect.ht_capa_mask,
7910                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7911                        sizeof(connect.ht_capa_mask));
7912
7913         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7914                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7915                         kzfree(connkeys);
7916                         return -EINVAL;
7917                 }
7918                 memcpy(&connect.ht_capa,
7919                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7920                        sizeof(connect.ht_capa));
7921         }
7922
7923         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7924                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7925
7926         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7927                 memcpy(&connect.vht_capa_mask,
7928                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7929                        sizeof(connect.vht_capa_mask));
7930
7931         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7932                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7933                         kzfree(connkeys);
7934                         return -EINVAL;
7935                 }
7936                 memcpy(&connect.vht_capa,
7937                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7938                        sizeof(connect.vht_capa));
7939         }
7940
7941         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7942                 if (!(rdev->wiphy.features &
7943                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7944                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7945                         return -EINVAL;
7946                 connect.flags |= ASSOC_REQ_USE_RRM;
7947         }
7948
7949         wdev_lock(dev->ieee80211_ptr);
7950         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7951         wdev_unlock(dev->ieee80211_ptr);
7952         if (err)
7953                 kzfree(connkeys);
7954         return err;
7955 }
7956
7957 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7958 {
7959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7960         struct net_device *dev = info->user_ptr[1];
7961         u16 reason;
7962         int ret;
7963
7964         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7965                 reason = WLAN_REASON_DEAUTH_LEAVING;
7966         else
7967                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7968
7969         if (reason == 0)
7970                 return -EINVAL;
7971
7972         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7973             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7974                 return -EOPNOTSUPP;
7975
7976         wdev_lock(dev->ieee80211_ptr);
7977         ret = cfg80211_disconnect(rdev, dev, reason, true);
7978         wdev_unlock(dev->ieee80211_ptr);
7979         return ret;
7980 }
7981
7982 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7983 {
7984         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7985         struct net *net;
7986         int err;
7987
7988         if (info->attrs[NL80211_ATTR_PID]) {
7989                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7990
7991                 net = get_net_ns_by_pid(pid);
7992         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
7993                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
7994
7995                 net = get_net_ns_by_fd(fd);
7996         } else {
7997                 return -EINVAL;
7998         }
7999
8000         if (IS_ERR(net))
8001                 return PTR_ERR(net);
8002
8003         err = 0;
8004
8005         /* check if anything to do */
8006         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8007                 err = cfg80211_switch_netns(rdev, net);
8008
8009         put_net(net);
8010         return err;
8011 }
8012
8013 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8014 {
8015         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8016         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8017                         struct cfg80211_pmksa *pmksa) = NULL;
8018         struct net_device *dev = info->user_ptr[1];
8019         struct cfg80211_pmksa pmksa;
8020
8021         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8022
8023         if (!info->attrs[NL80211_ATTR_MAC])
8024                 return -EINVAL;
8025
8026         if (!info->attrs[NL80211_ATTR_PMKID])
8027                 return -EINVAL;
8028
8029         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8030         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8031
8032         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8033             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8034                 return -EOPNOTSUPP;
8035
8036         switch (info->genlhdr->cmd) {
8037         case NL80211_CMD_SET_PMKSA:
8038                 rdev_ops = rdev->ops->set_pmksa;
8039                 break;
8040         case NL80211_CMD_DEL_PMKSA:
8041                 rdev_ops = rdev->ops->del_pmksa;
8042                 break;
8043         default:
8044                 WARN_ON(1);
8045                 break;
8046         }
8047
8048         if (!rdev_ops)
8049                 return -EOPNOTSUPP;
8050
8051         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8052 }
8053
8054 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8055 {
8056         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8057         struct net_device *dev = info->user_ptr[1];
8058
8059         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8060             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8061                 return -EOPNOTSUPP;
8062
8063         if (!rdev->ops->flush_pmksa)
8064                 return -EOPNOTSUPP;
8065
8066         return rdev_flush_pmksa(rdev, dev);
8067 }
8068
8069 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8070 {
8071         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8072         struct net_device *dev = info->user_ptr[1];
8073         u8 action_code, dialog_token;
8074         u32 peer_capability = 0;
8075         u16 status_code;
8076         u8 *peer;
8077         bool initiator;
8078
8079         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8080             !rdev->ops->tdls_mgmt)
8081                 return -EOPNOTSUPP;
8082
8083         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8084             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8085             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8086             !info->attrs[NL80211_ATTR_IE] ||
8087             !info->attrs[NL80211_ATTR_MAC])
8088                 return -EINVAL;
8089
8090         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8091         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8092         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8093         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8094         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8095         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8096                 peer_capability =
8097                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8098
8099         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8100                               dialog_token, status_code, peer_capability,
8101                               initiator,
8102                               nla_data(info->attrs[NL80211_ATTR_IE]),
8103                               nla_len(info->attrs[NL80211_ATTR_IE]));
8104 }
8105
8106 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8107 {
8108         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8109         struct net_device *dev = info->user_ptr[1];
8110         enum nl80211_tdls_operation operation;
8111         u8 *peer;
8112
8113         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8114             !rdev->ops->tdls_oper)
8115                 return -EOPNOTSUPP;
8116
8117         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8118             !info->attrs[NL80211_ATTR_MAC])
8119                 return -EINVAL;
8120
8121         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8122         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8123
8124         return rdev_tdls_oper(rdev, dev, peer, operation);
8125 }
8126
8127 static int nl80211_remain_on_channel(struct sk_buff *skb,
8128                                      struct genl_info *info)
8129 {
8130         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8131         struct wireless_dev *wdev = info->user_ptr[1];
8132         struct cfg80211_chan_def chandef;
8133         struct sk_buff *msg;
8134         void *hdr;
8135         u64 cookie;
8136         u32 duration;
8137         int err;
8138
8139         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8140             !info->attrs[NL80211_ATTR_DURATION])
8141                 return -EINVAL;
8142
8143         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8144
8145         if (!rdev->ops->remain_on_channel ||
8146             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8147                 return -EOPNOTSUPP;
8148
8149         /*
8150          * We should be on that channel for at least a minimum amount of
8151          * time (10ms) but no longer than the driver supports.
8152          */
8153         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8154             duration > rdev->wiphy.max_remain_on_channel_duration)
8155                 return -EINVAL;
8156
8157         err = nl80211_parse_chandef(rdev, info, &chandef);
8158         if (err)
8159                 return err;
8160
8161         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8162         if (!msg)
8163                 return -ENOMEM;
8164
8165         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8166                              NL80211_CMD_REMAIN_ON_CHANNEL);
8167         if (!hdr) {
8168                 err = -ENOBUFS;
8169                 goto free_msg;
8170         }
8171
8172         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8173                                      duration, &cookie);
8174
8175         if (err)
8176                 goto free_msg;
8177
8178         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8179                 goto nla_put_failure;
8180
8181         genlmsg_end(msg, hdr);
8182
8183         return genlmsg_reply(msg, info);
8184
8185  nla_put_failure:
8186         err = -ENOBUFS;
8187  free_msg:
8188         nlmsg_free(msg);
8189         return err;
8190 }
8191
8192 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8193                                             struct genl_info *info)
8194 {
8195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8196         struct wireless_dev *wdev = info->user_ptr[1];
8197         u64 cookie;
8198
8199         if (!info->attrs[NL80211_ATTR_COOKIE])
8200                 return -EINVAL;
8201
8202         if (!rdev->ops->cancel_remain_on_channel)
8203                 return -EOPNOTSUPP;
8204
8205         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8206
8207         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8208 }
8209
8210 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8211                            u8 *rates, u8 rates_len)
8212 {
8213         u8 i;
8214         u32 mask = 0;
8215
8216         for (i = 0; i < rates_len; i++) {
8217                 int rate = (rates[i] & 0x7f) * 5;
8218                 int ridx;
8219                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8220                         struct ieee80211_rate *srate =
8221                                 &sband->bitrates[ridx];
8222                         if (rate == srate->bitrate) {
8223                                 mask |= 1 << ridx;
8224                                 break;
8225                         }
8226                 }
8227                 if (ridx == sband->n_bitrates)
8228                         return 0; /* rate not found */
8229         }
8230
8231         return mask;
8232 }
8233
8234 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8235                                u8 *rates, u8 rates_len,
8236                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8237 {
8238         u8 i;
8239
8240         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8241
8242         for (i = 0; i < rates_len; i++) {
8243                 int ridx, rbit;
8244
8245                 ridx = rates[i] / 8;
8246                 rbit = BIT(rates[i] % 8);
8247
8248                 /* check validity */
8249                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8250                         return false;
8251
8252                 /* check availability */
8253                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8254                         mcs[ridx] |= rbit;
8255                 else
8256                         return false;
8257         }
8258
8259         return true;
8260 }
8261
8262 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8263 {
8264         u16 mcs_mask = 0;
8265
8266         switch (vht_mcs_map) {
8267         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8268                 break;
8269         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8270                 mcs_mask = 0x00FF;
8271                 break;
8272         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8273                 mcs_mask = 0x01FF;
8274                 break;
8275         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8276                 mcs_mask = 0x03FF;
8277                 break;
8278         default:
8279                 break;
8280         }
8281
8282         return mcs_mask;
8283 }
8284
8285 static void vht_build_mcs_mask(u16 vht_mcs_map,
8286                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8287 {
8288         u8 nss;
8289
8290         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8291                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8292                 vht_mcs_map >>= 2;
8293         }
8294 }
8295
8296 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8297                              struct nl80211_txrate_vht *txrate,
8298                              u16 mcs[NL80211_VHT_NSS_MAX])
8299 {
8300         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8301         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8302         u8 i;
8303
8304         if (!sband->vht_cap.vht_supported)
8305                 return false;
8306
8307         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8308
8309         /* Build vht_mcs_mask from VHT capabilities */
8310         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8311
8312         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8313                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8314                         mcs[i] = txrate->mcs[i];
8315                 else
8316                         return false;
8317         }
8318
8319         return true;
8320 }
8321
8322 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8323         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8324                                     .len = NL80211_MAX_SUPP_RATES },
8325         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8326                                 .len = NL80211_MAX_SUPP_HT_RATES },
8327         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8328         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8329 };
8330
8331 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8332                                        struct genl_info *info)
8333 {
8334         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8336         struct cfg80211_bitrate_mask mask;
8337         int rem, i;
8338         struct net_device *dev = info->user_ptr[1];
8339         struct nlattr *tx_rates;
8340         struct ieee80211_supported_band *sband;
8341         u16 vht_tx_mcs_map;
8342
8343         if (!rdev->ops->set_bitrate_mask)
8344                 return -EOPNOTSUPP;
8345
8346         memset(&mask, 0, sizeof(mask));
8347         /* Default to all rates enabled */
8348         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8349                 sband = rdev->wiphy.bands[i];
8350
8351                 if (!sband)
8352                         continue;
8353
8354                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8355                 memcpy(mask.control[i].ht_mcs,
8356                        sband->ht_cap.mcs.rx_mask,
8357                        sizeof(mask.control[i].ht_mcs));
8358
8359                 if (!sband->vht_cap.vht_supported)
8360                         continue;
8361
8362                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8363                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8364         }
8365
8366         /* if no rates are given set it back to the defaults */
8367         if (!info->attrs[NL80211_ATTR_TX_RATES])
8368                 goto out;
8369
8370         /*
8371          * The nested attribute uses enum nl80211_band as the index. This maps
8372          * directly to the enum ieee80211_band values used in cfg80211.
8373          */
8374         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8375         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8376                 enum ieee80211_band band = nla_type(tx_rates);
8377                 int err;
8378
8379                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8380                         return -EINVAL;
8381                 sband = rdev->wiphy.bands[band];
8382                 if (sband == NULL)
8383                         return -EINVAL;
8384                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8385                                 nla_len(tx_rates), nl80211_txattr_policy);
8386                 if (err)
8387                         return err;
8388                 if (tb[NL80211_TXRATE_LEGACY]) {
8389                         mask.control[band].legacy = rateset_to_mask(
8390                                 sband,
8391                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8392                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8393                         if ((mask.control[band].legacy == 0) &&
8394                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8395                                 return -EINVAL;
8396                 }
8397                 if (tb[NL80211_TXRATE_HT]) {
8398                         if (!ht_rateset_to_mask(
8399                                         sband,
8400                                         nla_data(tb[NL80211_TXRATE_HT]),
8401                                         nla_len(tb[NL80211_TXRATE_HT]),
8402                                         mask.control[band].ht_mcs))
8403                                 return -EINVAL;
8404                 }
8405                 if (tb[NL80211_TXRATE_VHT]) {
8406                         if (!vht_set_mcs_mask(
8407                                         sband,
8408                                         nla_data(tb[NL80211_TXRATE_VHT]),
8409                                         mask.control[band].vht_mcs))
8410                                 return -EINVAL;
8411                 }
8412                 if (tb[NL80211_TXRATE_GI]) {
8413                         mask.control[band].gi =
8414                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8415                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8416                                 return -EINVAL;
8417                 }
8418
8419                 if (mask.control[band].legacy == 0) {
8420                         /* don't allow empty legacy rates if HT or VHT
8421                          * are not even supported.
8422                          */
8423                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8424                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8425                                 return -EINVAL;
8426
8427                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8428                                 if (mask.control[band].ht_mcs[i])
8429                                         goto out;
8430
8431                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8432                                 if (mask.control[band].vht_mcs[i])
8433                                         goto out;
8434
8435                         /* legacy and mcs rates may not be both empty */
8436                         return -EINVAL;
8437                 }
8438         }
8439
8440 out:
8441         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8442 }
8443
8444 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8445 {
8446         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8447         struct wireless_dev *wdev = info->user_ptr[1];
8448         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8449
8450         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8451                 return -EINVAL;
8452
8453         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8454                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8455
8456         switch (wdev->iftype) {
8457         case NL80211_IFTYPE_STATION:
8458         case NL80211_IFTYPE_ADHOC:
8459         case NL80211_IFTYPE_P2P_CLIENT:
8460         case NL80211_IFTYPE_AP:
8461         case NL80211_IFTYPE_AP_VLAN:
8462         case NL80211_IFTYPE_MESH_POINT:
8463         case NL80211_IFTYPE_P2P_GO:
8464         case NL80211_IFTYPE_P2P_DEVICE:
8465                 break;
8466         default:
8467                 return -EOPNOTSUPP;
8468         }
8469
8470         /* not much point in registering if we can't reply */
8471         if (!rdev->ops->mgmt_tx)
8472                 return -EOPNOTSUPP;
8473
8474         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8475                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8476                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8477 }
8478
8479 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8480 {
8481         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8482         struct wireless_dev *wdev = info->user_ptr[1];
8483         struct cfg80211_chan_def chandef;
8484         int err;
8485         void *hdr = NULL;
8486         u64 cookie;
8487         struct sk_buff *msg = NULL;
8488         struct cfg80211_mgmt_tx_params params = {
8489                 .dont_wait_for_ack =
8490                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8491         };
8492
8493         if (!info->attrs[NL80211_ATTR_FRAME])
8494                 return -EINVAL;
8495
8496         if (!rdev->ops->mgmt_tx)
8497                 return -EOPNOTSUPP;
8498
8499         switch (wdev->iftype) {
8500         case NL80211_IFTYPE_P2P_DEVICE:
8501                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8502                         return -EINVAL;
8503         case NL80211_IFTYPE_STATION:
8504         case NL80211_IFTYPE_ADHOC:
8505         case NL80211_IFTYPE_P2P_CLIENT:
8506         case NL80211_IFTYPE_AP:
8507         case NL80211_IFTYPE_AP_VLAN:
8508         case NL80211_IFTYPE_MESH_POINT:
8509         case NL80211_IFTYPE_P2P_GO:
8510                 break;
8511         default:
8512                 return -EOPNOTSUPP;
8513         }
8514
8515         if (info->attrs[NL80211_ATTR_DURATION]) {
8516                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8517                         return -EINVAL;
8518                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8519
8520                 /*
8521                  * We should wait on the channel for at least a minimum amount
8522                  * of time (10ms) but no longer than the driver supports.
8523                  */
8524                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8525                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8526                         return -EINVAL;
8527
8528         }
8529
8530         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8531
8532         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8533                 return -EINVAL;
8534
8535         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8536
8537         /* get the channel if any has been specified, otherwise pass NULL to
8538          * the driver. The latter will use the current one
8539          */
8540         chandef.chan = NULL;
8541         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8542                 err = nl80211_parse_chandef(rdev, info, &chandef);
8543                 if (err)
8544                         return err;
8545         }
8546
8547         if (!chandef.chan && params.offchan)
8548                 return -EINVAL;
8549
8550         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8551         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8552
8553         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8554                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8555                 int i;
8556
8557                 if (len % sizeof(u16))
8558                         return -EINVAL;
8559
8560                 params.n_csa_offsets = len / sizeof(u16);
8561                 params.csa_offsets =
8562                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8563
8564                 /* check that all the offsets fit the frame */
8565                 for (i = 0; i < params.n_csa_offsets; i++) {
8566                         if (params.csa_offsets[i] >= params.len)
8567                                 return -EINVAL;
8568                 }
8569         }
8570
8571         if (!params.dont_wait_for_ack) {
8572                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8573                 if (!msg)
8574                         return -ENOMEM;
8575
8576                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8577                                      NL80211_CMD_FRAME);
8578                 if (!hdr) {
8579                         err = -ENOBUFS;
8580                         goto free_msg;
8581                 }
8582         }
8583
8584         params.chan = chandef.chan;
8585         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8586         if (err)
8587                 goto free_msg;
8588
8589         if (msg) {
8590                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8591                         goto nla_put_failure;
8592
8593                 genlmsg_end(msg, hdr);
8594                 return genlmsg_reply(msg, info);
8595         }
8596
8597         return 0;
8598
8599  nla_put_failure:
8600         err = -ENOBUFS;
8601  free_msg:
8602         nlmsg_free(msg);
8603         return err;
8604 }
8605
8606 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8607 {
8608         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8609         struct wireless_dev *wdev = info->user_ptr[1];
8610         u64 cookie;
8611
8612         if (!info->attrs[NL80211_ATTR_COOKIE])
8613                 return -EINVAL;
8614
8615         if (!rdev->ops->mgmt_tx_cancel_wait)
8616                 return -EOPNOTSUPP;
8617
8618         switch (wdev->iftype) {
8619         case NL80211_IFTYPE_STATION:
8620         case NL80211_IFTYPE_ADHOC:
8621         case NL80211_IFTYPE_P2P_CLIENT:
8622         case NL80211_IFTYPE_AP:
8623         case NL80211_IFTYPE_AP_VLAN:
8624         case NL80211_IFTYPE_P2P_GO:
8625         case NL80211_IFTYPE_P2P_DEVICE:
8626                 break;
8627         default:
8628                 return -EOPNOTSUPP;
8629         }
8630
8631         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8632
8633         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8634 }
8635
8636 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8637 {
8638         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8639         struct wireless_dev *wdev;
8640         struct net_device *dev = info->user_ptr[1];
8641         u8 ps_state;
8642         bool state;
8643         int err;
8644
8645         if (!info->attrs[NL80211_ATTR_PS_STATE])
8646                 return -EINVAL;
8647
8648         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8649
8650         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8651                 return -EINVAL;
8652
8653         wdev = dev->ieee80211_ptr;
8654
8655         if (!rdev->ops->set_power_mgmt)
8656                 return -EOPNOTSUPP;
8657
8658         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8659
8660         if (state == wdev->ps)
8661                 return 0;
8662
8663         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8664         if (!err)
8665                 wdev->ps = state;
8666         return err;
8667 }
8668
8669 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8670 {
8671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8672         enum nl80211_ps_state ps_state;
8673         struct wireless_dev *wdev;
8674         struct net_device *dev = info->user_ptr[1];
8675         struct sk_buff *msg;
8676         void *hdr;
8677         int err;
8678
8679         wdev = dev->ieee80211_ptr;
8680
8681         if (!rdev->ops->set_power_mgmt)
8682                 return -EOPNOTSUPP;
8683
8684         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8685         if (!msg)
8686                 return -ENOMEM;
8687
8688         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8689                              NL80211_CMD_GET_POWER_SAVE);
8690         if (!hdr) {
8691                 err = -ENOBUFS;
8692                 goto free_msg;
8693         }
8694
8695         if (wdev->ps)
8696                 ps_state = NL80211_PS_ENABLED;
8697         else
8698                 ps_state = NL80211_PS_DISABLED;
8699
8700         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8701                 goto nla_put_failure;
8702
8703         genlmsg_end(msg, hdr);
8704         return genlmsg_reply(msg, info);
8705
8706  nla_put_failure:
8707         err = -ENOBUFS;
8708  free_msg:
8709         nlmsg_free(msg);
8710         return err;
8711 }
8712
8713 static const struct nla_policy
8714 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8715         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8716         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8717         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8718         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8719         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8720         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8721 };
8722
8723 static int nl80211_set_cqm_txe(struct genl_info *info,
8724                                u32 rate, u32 pkts, u32 intvl)
8725 {
8726         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8727         struct net_device *dev = info->user_ptr[1];
8728         struct wireless_dev *wdev = dev->ieee80211_ptr;
8729
8730         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8731                 return -EINVAL;
8732
8733         if (!rdev->ops->set_cqm_txe_config)
8734                 return -EOPNOTSUPP;
8735
8736         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8737             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8738                 return -EOPNOTSUPP;
8739
8740         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8741 }
8742
8743 static int nl80211_set_cqm_rssi(struct genl_info *info,
8744                                 s32 threshold, u32 hysteresis)
8745 {
8746         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8747         struct net_device *dev = info->user_ptr[1];
8748         struct wireless_dev *wdev = dev->ieee80211_ptr;
8749
8750         if (threshold > 0)
8751                 return -EINVAL;
8752
8753         /* disabling - hysteresis should also be zero then */
8754         if (threshold == 0)
8755                 hysteresis = 0;
8756
8757         if (!rdev->ops->set_cqm_rssi_config)
8758                 return -EOPNOTSUPP;
8759
8760         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8761             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8762                 return -EOPNOTSUPP;
8763
8764         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8765 }
8766
8767 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8768 {
8769         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8770         struct nlattr *cqm;
8771         int err;
8772
8773         cqm = info->attrs[NL80211_ATTR_CQM];
8774         if (!cqm)
8775                 return -EINVAL;
8776
8777         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8778                                nl80211_attr_cqm_policy);
8779         if (err)
8780                 return err;
8781
8782         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8783             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8784                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8785                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8786
8787                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8788         }
8789
8790         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8791             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8792             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8793                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8794                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8795                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8796
8797                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8798         }
8799
8800         return -EINVAL;
8801 }
8802
8803 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8804 {
8805         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8806         struct net_device *dev = info->user_ptr[1];
8807         struct ocb_setup setup = {};
8808         int err;
8809
8810         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8811         if (err)
8812                 return err;
8813
8814         return cfg80211_join_ocb(rdev, dev, &setup);
8815 }
8816
8817 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8818 {
8819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8820         struct net_device *dev = info->user_ptr[1];
8821
8822         return cfg80211_leave_ocb(rdev, dev);
8823 }
8824
8825 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8826 {
8827         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8828         struct net_device *dev = info->user_ptr[1];
8829         struct mesh_config cfg;
8830         struct mesh_setup setup;
8831         int err;
8832
8833         /* start with default */
8834         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8835         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8836
8837         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8838                 /* and parse parameters if given */
8839                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8840                 if (err)
8841                         return err;
8842         }
8843
8844         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8845             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8846                 return -EINVAL;
8847
8848         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8849         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8850
8851         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8852             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8853                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8854                         return -EINVAL;
8855
8856         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8857                 setup.beacon_interval =
8858                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8859                 if (setup.beacon_interval < 10 ||
8860                     setup.beacon_interval > 10000)
8861                         return -EINVAL;
8862         }
8863
8864         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8865                 setup.dtim_period =
8866                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8867                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8868                         return -EINVAL;
8869         }
8870
8871         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8872                 /* parse additional setup parameters if given */
8873                 err = nl80211_parse_mesh_setup(info, &setup);
8874                 if (err)
8875                         return err;
8876         }
8877
8878         if (setup.user_mpm)
8879                 cfg.auto_open_plinks = false;
8880
8881         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8882                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8883                 if (err)
8884                         return err;
8885         } else {
8886                 /* cfg80211_join_mesh() will sort it out */
8887                 setup.chandef.chan = NULL;
8888         }
8889
8890         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8891                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8892                 int n_rates =
8893                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8894                 struct ieee80211_supported_band *sband;
8895
8896                 if (!setup.chandef.chan)
8897                         return -EINVAL;
8898
8899                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8900
8901                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8902                                              &setup.basic_rates);
8903                 if (err)
8904                         return err;
8905         }
8906
8907         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8908 }
8909
8910 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8911 {
8912         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8913         struct net_device *dev = info->user_ptr[1];
8914
8915         return cfg80211_leave_mesh(rdev, dev);
8916 }
8917
8918 #ifdef CONFIG_PM
8919 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8920                                         struct cfg80211_registered_device *rdev)
8921 {
8922         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8923         struct nlattr *nl_pats, *nl_pat;
8924         int i, pat_len;
8925
8926         if (!wowlan->n_patterns)
8927                 return 0;
8928
8929         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8930         if (!nl_pats)
8931                 return -ENOBUFS;
8932
8933         for (i = 0; i < wowlan->n_patterns; i++) {
8934                 nl_pat = nla_nest_start(msg, i + 1);
8935                 if (!nl_pat)
8936                         return -ENOBUFS;
8937                 pat_len = wowlan->patterns[i].pattern_len;
8938                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8939                             wowlan->patterns[i].mask) ||
8940                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8941                             wowlan->patterns[i].pattern) ||
8942                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8943                                 wowlan->patterns[i].pkt_offset))
8944                         return -ENOBUFS;
8945                 nla_nest_end(msg, nl_pat);
8946         }
8947         nla_nest_end(msg, nl_pats);
8948
8949         return 0;
8950 }
8951
8952 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8953                                    struct cfg80211_wowlan_tcp *tcp)
8954 {
8955         struct nlattr *nl_tcp;
8956
8957         if (!tcp)
8958                 return 0;
8959
8960         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8961         if (!nl_tcp)
8962                 return -ENOBUFS;
8963
8964         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8965             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8966             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8967             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8968             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8969             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8970                     tcp->payload_len, tcp->payload) ||
8971             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8972                         tcp->data_interval) ||
8973             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8974                     tcp->wake_len, tcp->wake_data) ||
8975             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8976                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8977                 return -ENOBUFS;
8978
8979         if (tcp->payload_seq.len &&
8980             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8981                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8982                 return -ENOBUFS;
8983
8984         if (tcp->payload_tok.len &&
8985             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8986                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8987                     &tcp->payload_tok))
8988                 return -ENOBUFS;
8989
8990         nla_nest_end(msg, nl_tcp);
8991
8992         return 0;
8993 }
8994
8995 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
8996                                   struct cfg80211_sched_scan_request *req)
8997 {
8998         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
8999         int i;
9000
9001         if (!req)
9002                 return 0;
9003
9004         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9005         if (!nd)
9006                 return -ENOBUFS;
9007
9008         if (req->n_scan_plans == 1 &&
9009             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9010                         req->scan_plans[0].interval * 1000))
9011                 return -ENOBUFS;
9012
9013         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9014                 return -ENOBUFS;
9015
9016         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9017         if (!freqs)
9018                 return -ENOBUFS;
9019
9020         for (i = 0; i < req->n_channels; i++)
9021                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9022
9023         nla_nest_end(msg, freqs);
9024
9025         if (req->n_match_sets) {
9026                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9027                 for (i = 0; i < req->n_match_sets; i++) {
9028                         match = nla_nest_start(msg, i);
9029                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9030                                 req->match_sets[i].ssid.ssid_len,
9031                                 req->match_sets[i].ssid.ssid);
9032                         nla_nest_end(msg, match);
9033                 }
9034                 nla_nest_end(msg, matches);
9035         }
9036
9037         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9038         if (!scan_plans)
9039                 return -ENOBUFS;
9040
9041         for (i = 0; i < req->n_scan_plans; i++) {
9042                 scan_plan = nla_nest_start(msg, i + 1);
9043                 if (!scan_plan ||
9044                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9045                                 req->scan_plans[i].interval) ||
9046                     (req->scan_plans[i].iterations &&
9047                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9048                                  req->scan_plans[i].iterations)))
9049                         return -ENOBUFS;
9050                 nla_nest_end(msg, scan_plan);
9051         }
9052         nla_nest_end(msg, scan_plans);
9053
9054         nla_nest_end(msg, nd);
9055
9056         return 0;
9057 }
9058
9059 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9060 {
9061         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9062         struct sk_buff *msg;
9063         void *hdr;
9064         u32 size = NLMSG_DEFAULT_SIZE;
9065
9066         if (!rdev->wiphy.wowlan)
9067                 return -EOPNOTSUPP;
9068
9069         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9070                 /* adjust size to have room for all the data */
9071                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9072                         rdev->wiphy.wowlan_config->tcp->payload_len +
9073                         rdev->wiphy.wowlan_config->tcp->wake_len +
9074                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9075         }
9076
9077         msg = nlmsg_new(size, GFP_KERNEL);
9078         if (!msg)
9079                 return -ENOMEM;
9080
9081         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9082                              NL80211_CMD_GET_WOWLAN);
9083         if (!hdr)
9084                 goto nla_put_failure;
9085
9086         if (rdev->wiphy.wowlan_config) {
9087                 struct nlattr *nl_wowlan;
9088
9089                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9090                 if (!nl_wowlan)
9091                         goto nla_put_failure;
9092
9093                 if ((rdev->wiphy.wowlan_config->any &&
9094                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9095                     (rdev->wiphy.wowlan_config->disconnect &&
9096                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9097                     (rdev->wiphy.wowlan_config->magic_pkt &&
9098                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9099                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9100                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9101                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9102                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9103                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9104                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9105                     (rdev->wiphy.wowlan_config->rfkill_release &&
9106                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9107                         goto nla_put_failure;
9108
9109                 if (nl80211_send_wowlan_patterns(msg, rdev))
9110                         goto nla_put_failure;
9111
9112                 if (nl80211_send_wowlan_tcp(msg,
9113                                             rdev->wiphy.wowlan_config->tcp))
9114                         goto nla_put_failure;
9115
9116                 if (nl80211_send_wowlan_nd(
9117                             msg,
9118                             rdev->wiphy.wowlan_config->nd_config))
9119                         goto nla_put_failure;
9120
9121                 nla_nest_end(msg, nl_wowlan);
9122         }
9123
9124         genlmsg_end(msg, hdr);
9125         return genlmsg_reply(msg, info);
9126
9127 nla_put_failure:
9128         nlmsg_free(msg);
9129         return -ENOBUFS;
9130 }
9131
9132 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9133                                     struct nlattr *attr,
9134                                     struct cfg80211_wowlan *trig)
9135 {
9136         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9137         struct cfg80211_wowlan_tcp *cfg;
9138         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9139         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9140         u32 size;
9141         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9142         int err, port;
9143
9144         if (!rdev->wiphy.wowlan->tcp)
9145                 return -EINVAL;
9146
9147         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9148                         nla_data(attr), nla_len(attr),
9149                         nl80211_wowlan_tcp_policy);
9150         if (err)
9151                 return err;
9152
9153         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9154             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9155             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9156             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9157             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9158             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9159             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9160             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9161                 return -EINVAL;
9162
9163         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9164         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9165                 return -EINVAL;
9166
9167         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9168                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9169             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9170                 return -EINVAL;
9171
9172         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9173         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9174                 return -EINVAL;
9175
9176         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9177         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9178                 return -EINVAL;
9179
9180         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9181                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9182
9183                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9184                 tokens_size = tokln - sizeof(*tok);
9185
9186                 if (!tok->len || tokens_size % tok->len)
9187                         return -EINVAL;
9188                 if (!rdev->wiphy.wowlan->tcp->tok)
9189                         return -EINVAL;
9190                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9191                         return -EINVAL;
9192                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9193                         return -EINVAL;
9194                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9195                         return -EINVAL;
9196                 if (tok->offset + tok->len > data_size)
9197                         return -EINVAL;
9198         }
9199
9200         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9201                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9202                 if (!rdev->wiphy.wowlan->tcp->seq)
9203                         return -EINVAL;
9204                 if (seq->len == 0 || seq->len > 4)
9205                         return -EINVAL;
9206                 if (seq->len + seq->offset > data_size)
9207                         return -EINVAL;
9208         }
9209
9210         size = sizeof(*cfg);
9211         size += data_size;
9212         size += wake_size + wake_mask_size;
9213         size += tokens_size;
9214
9215         cfg = kzalloc(size, GFP_KERNEL);
9216         if (!cfg)
9217                 return -ENOMEM;
9218         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9219         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9220         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9221                ETH_ALEN);
9222         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9223                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9224         else
9225                 port = 0;
9226 #ifdef CONFIG_INET
9227         /* allocate a socket and port for it and use it */
9228         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9229                             IPPROTO_TCP, &cfg->sock, 1);
9230         if (err) {
9231                 kfree(cfg);
9232                 return err;
9233         }
9234         if (inet_csk_get_port(cfg->sock->sk, port)) {
9235                 sock_release(cfg->sock);
9236                 kfree(cfg);
9237                 return -EADDRINUSE;
9238         }
9239         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9240 #else
9241         if (!port) {
9242                 kfree(cfg);
9243                 return -EINVAL;
9244         }
9245         cfg->src_port = port;
9246 #endif
9247
9248         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9249         cfg->payload_len = data_size;
9250         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9251         memcpy((void *)cfg->payload,
9252                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9253                data_size);
9254         if (seq)
9255                 cfg->payload_seq = *seq;
9256         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9257         cfg->wake_len = wake_size;
9258         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9259         memcpy((void *)cfg->wake_data,
9260                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9261                wake_size);
9262         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9263                          data_size + wake_size;
9264         memcpy((void *)cfg->wake_mask,
9265                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9266                wake_mask_size);
9267         if (tok) {
9268                 cfg->tokens_size = tokens_size;
9269                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9270         }
9271
9272         trig->tcp = cfg;
9273
9274         return 0;
9275 }
9276
9277 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9278                                    const struct wiphy_wowlan_support *wowlan,
9279                                    struct nlattr *attr,
9280                                    struct cfg80211_wowlan *trig)
9281 {
9282         struct nlattr **tb;
9283         int err;
9284
9285         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9286         if (!tb)
9287                 return -ENOMEM;
9288
9289         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9290                 err = -EOPNOTSUPP;
9291                 goto out;
9292         }
9293
9294         err = nla_parse(tb, NL80211_ATTR_MAX,
9295                         nla_data(attr), nla_len(attr),
9296                         nl80211_policy);
9297         if (err)
9298                 goto out;
9299
9300         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9301         err = PTR_ERR_OR_ZERO(trig->nd_config);
9302         if (err)
9303                 trig->nd_config = NULL;
9304
9305 out:
9306         kfree(tb);
9307         return err;
9308 }
9309
9310 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9311 {
9312         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9313         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9314         struct cfg80211_wowlan new_triggers = {};
9315         struct cfg80211_wowlan *ntrig;
9316         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9317         int err, i;
9318         bool prev_enabled = rdev->wiphy.wowlan_config;
9319         bool regular = false;
9320
9321         if (!wowlan)
9322                 return -EOPNOTSUPP;
9323
9324         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9325                 cfg80211_rdev_free_wowlan(rdev);
9326                 rdev->wiphy.wowlan_config = NULL;
9327                 goto set_wakeup;
9328         }
9329
9330         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9331                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9332                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9333                         nl80211_wowlan_policy);
9334         if (err)
9335                 return err;
9336
9337         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9338                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9339                         return -EINVAL;
9340                 new_triggers.any = true;
9341         }
9342
9343         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9344                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9345                         return -EINVAL;
9346                 new_triggers.disconnect = true;
9347                 regular = true;
9348         }
9349
9350         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9351                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9352                         return -EINVAL;
9353                 new_triggers.magic_pkt = true;
9354                 regular = true;
9355         }
9356
9357         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9358                 return -EINVAL;
9359
9360         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9361                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9362                         return -EINVAL;
9363                 new_triggers.gtk_rekey_failure = true;
9364                 regular = true;
9365         }
9366
9367         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9368                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9369                         return -EINVAL;
9370                 new_triggers.eap_identity_req = true;
9371                 regular = true;
9372         }
9373
9374         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9375                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9376                         return -EINVAL;
9377                 new_triggers.four_way_handshake = true;
9378                 regular = true;
9379         }
9380
9381         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9382                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9383                         return -EINVAL;
9384                 new_triggers.rfkill_release = true;
9385                 regular = true;
9386         }
9387
9388         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9389                 struct nlattr *pat;
9390                 int n_patterns = 0;
9391                 int rem, pat_len, mask_len, pkt_offset;
9392                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9393
9394                 regular = true;
9395
9396                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9397                                     rem)
9398                         n_patterns++;
9399                 if (n_patterns > wowlan->n_patterns)
9400                         return -EINVAL;
9401
9402                 new_triggers.patterns = kcalloc(n_patterns,
9403                                                 sizeof(new_triggers.patterns[0]),
9404                                                 GFP_KERNEL);
9405                 if (!new_triggers.patterns)
9406                         return -ENOMEM;
9407
9408                 new_triggers.n_patterns = n_patterns;
9409                 i = 0;
9410
9411                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9412                                     rem) {
9413                         u8 *mask_pat;
9414
9415                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9416                                   nla_len(pat), NULL);
9417                         err = -EINVAL;
9418                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9419                             !pat_tb[NL80211_PKTPAT_PATTERN])
9420                                 goto error;
9421                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9422                         mask_len = DIV_ROUND_UP(pat_len, 8);
9423                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9424                                 goto error;
9425                         if (pat_len > wowlan->pattern_max_len ||
9426                             pat_len < wowlan->pattern_min_len)
9427                                 goto error;
9428
9429                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9430                                 pkt_offset = 0;
9431                         else
9432                                 pkt_offset = nla_get_u32(
9433                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9434                         if (pkt_offset > wowlan->max_pkt_offset)
9435                                 goto error;
9436                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9437
9438                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9439                         if (!mask_pat) {
9440                                 err = -ENOMEM;
9441                                 goto error;
9442                         }
9443                         new_triggers.patterns[i].mask = mask_pat;
9444                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9445                                mask_len);
9446                         mask_pat += mask_len;
9447                         new_triggers.patterns[i].pattern = mask_pat;
9448                         new_triggers.patterns[i].pattern_len = pat_len;
9449                         memcpy(mask_pat,
9450                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9451                                pat_len);
9452                         i++;
9453                 }
9454         }
9455
9456         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9457                 regular = true;
9458                 err = nl80211_parse_wowlan_tcp(
9459                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9460                         &new_triggers);
9461                 if (err)
9462                         goto error;
9463         }
9464
9465         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9466                 regular = true;
9467                 err = nl80211_parse_wowlan_nd(
9468                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9469                         &new_triggers);
9470                 if (err)
9471                         goto error;
9472         }
9473
9474         /* The 'any' trigger means the device continues operating more or less
9475          * as in its normal operation mode and wakes up the host on most of the
9476          * normal interrupts (like packet RX, ...)
9477          * It therefore makes little sense to combine with the more constrained
9478          * wakeup trigger modes.
9479          */
9480         if (new_triggers.any && regular) {
9481                 err = -EINVAL;
9482                 goto error;
9483         }
9484
9485         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9486         if (!ntrig) {
9487                 err = -ENOMEM;
9488                 goto error;
9489         }
9490         cfg80211_rdev_free_wowlan(rdev);
9491         rdev->wiphy.wowlan_config = ntrig;
9492
9493  set_wakeup:
9494         if (rdev->ops->set_wakeup &&
9495             prev_enabled != !!rdev->wiphy.wowlan_config)
9496                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9497
9498         return 0;
9499  error:
9500         for (i = 0; i < new_triggers.n_patterns; i++)
9501                 kfree(new_triggers.patterns[i].mask);
9502         kfree(new_triggers.patterns);
9503         if (new_triggers.tcp && new_triggers.tcp->sock)
9504                 sock_release(new_triggers.tcp->sock);
9505         kfree(new_triggers.tcp);
9506         kfree(new_triggers.nd_config);
9507         return err;
9508 }
9509 #endif
9510
9511 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9512                                        struct cfg80211_registered_device *rdev)
9513 {
9514         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9515         int i, j, pat_len;
9516         struct cfg80211_coalesce_rules *rule;
9517
9518         if (!rdev->coalesce->n_rules)
9519                 return 0;
9520
9521         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9522         if (!nl_rules)
9523                 return -ENOBUFS;
9524
9525         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9526                 nl_rule = nla_nest_start(msg, i + 1);
9527                 if (!nl_rule)
9528                         return -ENOBUFS;
9529
9530                 rule = &rdev->coalesce->rules[i];
9531                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9532                                 rule->delay))
9533                         return -ENOBUFS;
9534
9535                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9536                                 rule->condition))
9537                         return -ENOBUFS;
9538
9539                 nl_pats = nla_nest_start(msg,
9540                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9541                 if (!nl_pats)
9542                         return -ENOBUFS;
9543
9544                 for (j = 0; j < rule->n_patterns; j++) {
9545                         nl_pat = nla_nest_start(msg, j + 1);
9546                         if (!nl_pat)
9547                                 return -ENOBUFS;
9548                         pat_len = rule->patterns[j].pattern_len;
9549                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9550                                     DIV_ROUND_UP(pat_len, 8),
9551                                     rule->patterns[j].mask) ||
9552                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9553                                     rule->patterns[j].pattern) ||
9554                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9555                                         rule->patterns[j].pkt_offset))
9556                                 return -ENOBUFS;
9557                         nla_nest_end(msg, nl_pat);
9558                 }
9559                 nla_nest_end(msg, nl_pats);
9560                 nla_nest_end(msg, nl_rule);
9561         }
9562         nla_nest_end(msg, nl_rules);
9563
9564         return 0;
9565 }
9566
9567 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9568 {
9569         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9570         struct sk_buff *msg;
9571         void *hdr;
9572
9573         if (!rdev->wiphy.coalesce)
9574                 return -EOPNOTSUPP;
9575
9576         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9577         if (!msg)
9578                 return -ENOMEM;
9579
9580         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9581                              NL80211_CMD_GET_COALESCE);
9582         if (!hdr)
9583                 goto nla_put_failure;
9584
9585         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9586                 goto nla_put_failure;
9587
9588         genlmsg_end(msg, hdr);
9589         return genlmsg_reply(msg, info);
9590
9591 nla_put_failure:
9592         nlmsg_free(msg);
9593         return -ENOBUFS;
9594 }
9595
9596 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9597 {
9598         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9599         int i, j;
9600         struct cfg80211_coalesce_rules *rule;
9601
9602         if (!coalesce)
9603                 return;
9604
9605         for (i = 0; i < coalesce->n_rules; i++) {
9606                 rule = &coalesce->rules[i];
9607                 for (j = 0; j < rule->n_patterns; j++)
9608                         kfree(rule->patterns[j].mask);
9609                 kfree(rule->patterns);
9610         }
9611         kfree(coalesce->rules);
9612         kfree(coalesce);
9613         rdev->coalesce = NULL;
9614 }
9615
9616 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9617                                        struct nlattr *rule,
9618                                        struct cfg80211_coalesce_rules *new_rule)
9619 {
9620         int err, i;
9621         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9622         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9623         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9624         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9625
9626         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9627                         nla_len(rule), nl80211_coalesce_policy);
9628         if (err)
9629                 return err;
9630
9631         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9632                 new_rule->delay =
9633                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9634         if (new_rule->delay > coalesce->max_delay)
9635                 return -EINVAL;
9636
9637         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9638                 new_rule->condition =
9639                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9640         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9641             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9642                 return -EINVAL;
9643
9644         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9645                 return -EINVAL;
9646
9647         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9648                             rem)
9649                 n_patterns++;
9650         if (n_patterns > coalesce->n_patterns)
9651                 return -EINVAL;
9652
9653         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9654                                      GFP_KERNEL);
9655         if (!new_rule->patterns)
9656                 return -ENOMEM;
9657
9658         new_rule->n_patterns = n_patterns;
9659         i = 0;
9660
9661         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9662                             rem) {
9663                 u8 *mask_pat;
9664
9665                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9666                           nla_len(pat), NULL);
9667                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9668                     !pat_tb[NL80211_PKTPAT_PATTERN])
9669                         return -EINVAL;
9670                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9671                 mask_len = DIV_ROUND_UP(pat_len, 8);
9672                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9673                         return -EINVAL;
9674                 if (pat_len > coalesce->pattern_max_len ||
9675                     pat_len < coalesce->pattern_min_len)
9676                         return -EINVAL;
9677
9678                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9679                         pkt_offset = 0;
9680                 else
9681                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9682                 if (pkt_offset > coalesce->max_pkt_offset)
9683                         return -EINVAL;
9684                 new_rule->patterns[i].pkt_offset = pkt_offset;
9685
9686                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9687                 if (!mask_pat)
9688                         return -ENOMEM;
9689
9690                 new_rule->patterns[i].mask = mask_pat;
9691                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9692                        mask_len);
9693
9694                 mask_pat += mask_len;
9695                 new_rule->patterns[i].pattern = mask_pat;
9696                 new_rule->patterns[i].pattern_len = pat_len;
9697                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9698                        pat_len);
9699                 i++;
9700         }
9701
9702         return 0;
9703 }
9704
9705 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9706 {
9707         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9708         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9709         struct cfg80211_coalesce new_coalesce = {};
9710         struct cfg80211_coalesce *n_coalesce;
9711         int err, rem_rule, n_rules = 0, i, j;
9712         struct nlattr *rule;
9713         struct cfg80211_coalesce_rules *tmp_rule;
9714
9715         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9716                 return -EOPNOTSUPP;
9717
9718         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9719                 cfg80211_rdev_free_coalesce(rdev);
9720                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
9721                 return 0;
9722         }
9723
9724         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9725                             rem_rule)
9726                 n_rules++;
9727         if (n_rules > coalesce->n_rules)
9728                 return -EINVAL;
9729
9730         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9731                                      GFP_KERNEL);
9732         if (!new_coalesce.rules)
9733                 return -ENOMEM;
9734
9735         new_coalesce.n_rules = n_rules;
9736         i = 0;
9737
9738         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9739                             rem_rule) {
9740                 err = nl80211_parse_coalesce_rule(rdev, rule,
9741                                                   &new_coalesce.rules[i]);
9742                 if (err)
9743                         goto error;
9744
9745                 i++;
9746         }
9747
9748         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
9749         if (err)
9750                 goto error;
9751
9752         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9753         if (!n_coalesce) {
9754                 err = -ENOMEM;
9755                 goto error;
9756         }
9757         cfg80211_rdev_free_coalesce(rdev);
9758         rdev->coalesce = n_coalesce;
9759
9760         return 0;
9761 error:
9762         for (i = 0; i < new_coalesce.n_rules; i++) {
9763                 tmp_rule = &new_coalesce.rules[i];
9764                 for (j = 0; j < tmp_rule->n_patterns; j++)
9765                         kfree(tmp_rule->patterns[j].mask);
9766                 kfree(tmp_rule->patterns);
9767         }
9768         kfree(new_coalesce.rules);
9769
9770         return err;
9771 }
9772
9773 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9774 {
9775         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9776         struct net_device *dev = info->user_ptr[1];
9777         struct wireless_dev *wdev = dev->ieee80211_ptr;
9778         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9779         struct cfg80211_gtk_rekey_data rekey_data;
9780         int err;
9781
9782         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9783                 return -EINVAL;
9784
9785         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9786                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9787                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9788                         nl80211_rekey_policy);
9789         if (err)
9790                 return err;
9791
9792         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9793                 return -ERANGE;
9794         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9795                 return -ERANGE;
9796         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9797                 return -ERANGE;
9798
9799         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9800         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9801         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9802
9803         wdev_lock(wdev);
9804         if (!wdev->current_bss) {
9805                 err = -ENOTCONN;
9806                 goto out;
9807         }
9808
9809         if (!rdev->ops->set_rekey_data) {
9810                 err = -EOPNOTSUPP;
9811                 goto out;
9812         }
9813
9814         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9815  out:
9816         wdev_unlock(wdev);
9817         return err;
9818 }
9819
9820 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9821                                              struct genl_info *info)
9822 {
9823         struct net_device *dev = info->user_ptr[1];
9824         struct wireless_dev *wdev = dev->ieee80211_ptr;
9825
9826         if (wdev->iftype != NL80211_IFTYPE_AP &&
9827             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9828                 return -EINVAL;
9829
9830         if (wdev->ap_unexpected_nlportid)
9831                 return -EBUSY;
9832
9833         wdev->ap_unexpected_nlportid = info->snd_portid;
9834         return 0;
9835 }
9836
9837 static int nl80211_probe_client(struct sk_buff *skb,
9838                                 struct genl_info *info)
9839 {
9840         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9841         struct net_device *dev = info->user_ptr[1];
9842         struct wireless_dev *wdev = dev->ieee80211_ptr;
9843         struct sk_buff *msg;
9844         void *hdr;
9845         const u8 *addr;
9846         u64 cookie;
9847         int err;
9848
9849         if (wdev->iftype != NL80211_IFTYPE_AP &&
9850             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9851                 return -EOPNOTSUPP;
9852
9853         if (!info->attrs[NL80211_ATTR_MAC])
9854                 return -EINVAL;
9855
9856         if (!rdev->ops->probe_client)
9857                 return -EOPNOTSUPP;
9858
9859         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9860         if (!msg)
9861                 return -ENOMEM;
9862
9863         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9864                              NL80211_CMD_PROBE_CLIENT);
9865         if (!hdr) {
9866                 err = -ENOBUFS;
9867                 goto free_msg;
9868         }
9869
9870         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9871
9872         err = rdev_probe_client(rdev, dev, addr, &cookie);
9873         if (err)
9874                 goto free_msg;
9875
9876         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9877                 goto nla_put_failure;
9878
9879         genlmsg_end(msg, hdr);
9880
9881         return genlmsg_reply(msg, info);
9882
9883  nla_put_failure:
9884         err = -ENOBUFS;
9885  free_msg:
9886         nlmsg_free(msg);
9887         return err;
9888 }
9889
9890 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9891 {
9892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9893         struct cfg80211_beacon_registration *reg, *nreg;
9894         int rv;
9895
9896         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9897                 return -EOPNOTSUPP;
9898
9899         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9900         if (!nreg)
9901                 return -ENOMEM;
9902
9903         /* First, check if already registered. */
9904         spin_lock_bh(&rdev->beacon_registrations_lock);
9905         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9906                 if (reg->nlportid == info->snd_portid) {
9907                         rv = -EALREADY;
9908                         goto out_err;
9909                 }
9910         }
9911         /* Add it to the list */
9912         nreg->nlportid = info->snd_portid;
9913         list_add(&nreg->list, &rdev->beacon_registrations);
9914
9915         spin_unlock_bh(&rdev->beacon_registrations_lock);
9916
9917         return 0;
9918 out_err:
9919         spin_unlock_bh(&rdev->beacon_registrations_lock);
9920         kfree(nreg);
9921         return rv;
9922 }
9923
9924 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9925 {
9926         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9927         struct wireless_dev *wdev = info->user_ptr[1];
9928         int err;
9929
9930         if (!rdev->ops->start_p2p_device)
9931                 return -EOPNOTSUPP;
9932
9933         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9934                 return -EOPNOTSUPP;
9935
9936         if (wdev->p2p_started)
9937                 return 0;
9938
9939         if (rfkill_blocked(rdev->rfkill))
9940                 return -ERFKILL;
9941
9942         err = rdev_start_p2p_device(rdev, wdev);
9943         if (err)
9944                 return err;
9945
9946         wdev->p2p_started = true;
9947         rdev->opencount++;
9948
9949         return 0;
9950 }
9951
9952 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9953 {
9954         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9955         struct wireless_dev *wdev = info->user_ptr[1];
9956
9957         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9958                 return -EOPNOTSUPP;
9959
9960         if (!rdev->ops->stop_p2p_device)
9961                 return -EOPNOTSUPP;
9962
9963         cfg80211_stop_p2p_device(rdev, wdev);
9964
9965         return 0;
9966 }
9967
9968 static int nl80211_get_protocol_features(struct sk_buff *skb,
9969                                          struct genl_info *info)
9970 {
9971         void *hdr;
9972         struct sk_buff *msg;
9973
9974         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9975         if (!msg)
9976                 return -ENOMEM;
9977
9978         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9979                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9980         if (!hdr)
9981                 goto nla_put_failure;
9982
9983         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9984                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9985                 goto nla_put_failure;
9986
9987         genlmsg_end(msg, hdr);
9988         return genlmsg_reply(msg, info);
9989
9990  nla_put_failure:
9991         kfree_skb(msg);
9992         return -ENOBUFS;
9993 }
9994
9995 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9996 {
9997         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9998         struct cfg80211_update_ft_ies_params ft_params;
9999         struct net_device *dev = info->user_ptr[1];
10000
10001         if (!rdev->ops->update_ft_ies)
10002                 return -EOPNOTSUPP;
10003
10004         if (!info->attrs[NL80211_ATTR_MDID] ||
10005             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10006                 return -EINVAL;
10007
10008         memset(&ft_params, 0, sizeof(ft_params));
10009         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10010         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10011         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10012
10013         return rdev_update_ft_ies(rdev, dev, &ft_params);
10014 }
10015
10016 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10017                                        struct genl_info *info)
10018 {
10019         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10020         struct wireless_dev *wdev = info->user_ptr[1];
10021         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10022         u16 duration;
10023         int ret;
10024
10025         if (!rdev->ops->crit_proto_start)
10026                 return -EOPNOTSUPP;
10027
10028         if (WARN_ON(!rdev->ops->crit_proto_stop))
10029                 return -EINVAL;
10030
10031         if (rdev->crit_proto_nlportid)
10032                 return -EBUSY;
10033
10034         /* determine protocol if provided */
10035         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10036                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10037
10038         if (proto >= NUM_NL80211_CRIT_PROTO)
10039                 return -EINVAL;
10040
10041         /* timeout must be provided */
10042         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10043                 return -EINVAL;
10044
10045         duration =
10046                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10047
10048         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10049                 return -ERANGE;
10050
10051         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10052         if (!ret)
10053                 rdev->crit_proto_nlportid = info->snd_portid;
10054
10055         return ret;
10056 }
10057
10058 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10059                                       struct genl_info *info)
10060 {
10061         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10062         struct wireless_dev *wdev = info->user_ptr[1];
10063
10064         if (!rdev->ops->crit_proto_stop)
10065                 return -EOPNOTSUPP;
10066
10067         if (rdev->crit_proto_nlportid) {
10068                 rdev->crit_proto_nlportid = 0;
10069                 rdev_crit_proto_stop(rdev, wdev);
10070         }
10071         return 0;
10072 }
10073
10074 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10075 {
10076         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10077         struct wireless_dev *wdev =
10078                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10079         int i, err;
10080         u32 vid, subcmd;
10081
10082         if (!rdev->wiphy.vendor_commands)
10083                 return -EOPNOTSUPP;
10084
10085         if (IS_ERR(wdev)) {
10086                 err = PTR_ERR(wdev);
10087                 if (err != -EINVAL)
10088                         return err;
10089                 wdev = NULL;
10090         } else if (wdev->wiphy != &rdev->wiphy) {
10091                 return -EINVAL;
10092         }
10093
10094         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10095             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10096                 return -EINVAL;
10097
10098         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10099         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10100         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10101                 const struct wiphy_vendor_command *vcmd;
10102                 void *data = NULL;
10103                 int len = 0;
10104
10105                 vcmd = &rdev->wiphy.vendor_commands[i];
10106
10107                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10108                         continue;
10109
10110                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10111                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10112                         if (!wdev)
10113                                 return -EINVAL;
10114                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10115                             !wdev->netdev)
10116                                 return -EINVAL;
10117
10118                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10119                                 if (wdev->netdev &&
10120                                     !netif_running(wdev->netdev))
10121                                         return -ENETDOWN;
10122                                 if (!wdev->netdev && !wdev->p2p_started)
10123                                         return -ENETDOWN;
10124                         }
10125
10126                         if (!vcmd->doit)
10127                                 return -EOPNOTSUPP;
10128                 } else {
10129                         wdev = NULL;
10130                 }
10131
10132                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10133                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10134                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10135                 }
10136
10137                 rdev->cur_cmd_info = info;
10138                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10139                                                           data, len);
10140                 rdev->cur_cmd_info = NULL;
10141                 return err;
10142         }
10143
10144         return -EOPNOTSUPP;
10145 }
10146
10147 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10148                                        struct netlink_callback *cb,
10149                                        struct cfg80211_registered_device **rdev,
10150                                        struct wireless_dev **wdev)
10151 {
10152         u32 vid, subcmd;
10153         unsigned int i;
10154         int vcmd_idx = -1;
10155         int err;
10156         void *data = NULL;
10157         unsigned int data_len = 0;
10158
10159         rtnl_lock();
10160
10161         if (cb->args[0]) {
10162                 /* subtract the 1 again here */
10163                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10164                 struct wireless_dev *tmp;
10165
10166                 if (!wiphy) {
10167                         err = -ENODEV;
10168                         goto out_unlock;
10169                 }
10170                 *rdev = wiphy_to_rdev(wiphy);
10171                 *wdev = NULL;
10172
10173                 if (cb->args[1]) {
10174                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10175                                 if (tmp->identifier == cb->args[1] - 1) {
10176                                         *wdev = tmp;
10177                                         break;
10178                                 }
10179                         }
10180                 }
10181
10182                 /* keep rtnl locked in successful case */
10183                 return 0;
10184         }
10185
10186         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10187                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10188                           nl80211_policy);
10189         if (err)
10190                 goto out_unlock;
10191
10192         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10193             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10194                 err = -EINVAL;
10195                 goto out_unlock;
10196         }
10197
10198         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10199                                            nl80211_fam.attrbuf);
10200         if (IS_ERR(*wdev))
10201                 *wdev = NULL;
10202
10203         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10204                                            nl80211_fam.attrbuf);
10205         if (IS_ERR(*rdev)) {
10206                 err = PTR_ERR(*rdev);
10207                 goto out_unlock;
10208         }
10209
10210         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10211         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10212
10213         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10214                 const struct wiphy_vendor_command *vcmd;
10215
10216                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10217
10218                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10219                         continue;
10220
10221                 if (!vcmd->dumpit) {
10222                         err = -EOPNOTSUPP;
10223                         goto out_unlock;
10224                 }
10225
10226                 vcmd_idx = i;
10227                 break;
10228         }
10229
10230         if (vcmd_idx < 0) {
10231                 err = -EOPNOTSUPP;
10232                 goto out_unlock;
10233         }
10234
10235         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10236                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10237                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10238         }
10239
10240         /* 0 is the first index - add 1 to parse only once */
10241         cb->args[0] = (*rdev)->wiphy_idx + 1;
10242         /* add 1 to know if it was NULL */
10243         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10244         cb->args[2] = vcmd_idx;
10245         cb->args[3] = (unsigned long)data;
10246         cb->args[4] = data_len;
10247
10248         /* keep rtnl locked in successful case */
10249         return 0;
10250  out_unlock:
10251         rtnl_unlock();
10252         return err;
10253 }
10254
10255 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10256                                    struct netlink_callback *cb)
10257 {
10258         struct cfg80211_registered_device *rdev;
10259         struct wireless_dev *wdev;
10260         unsigned int vcmd_idx;
10261         const struct wiphy_vendor_command *vcmd;
10262         void *data;
10263         int data_len;
10264         int err;
10265         struct nlattr *vendor_data;
10266
10267         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10268         if (err)
10269                 return err;
10270
10271         vcmd_idx = cb->args[2];
10272         data = (void *)cb->args[3];
10273         data_len = cb->args[4];
10274         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10275
10276         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10277                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10278                 if (!wdev)
10279                         return -EINVAL;
10280                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10281                     !wdev->netdev)
10282                         return -EINVAL;
10283
10284                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10285                         if (wdev->netdev &&
10286                             !netif_running(wdev->netdev))
10287                                 return -ENETDOWN;
10288                         if (!wdev->netdev && !wdev->p2p_started)
10289                                 return -ENETDOWN;
10290                 }
10291         }
10292
10293         while (1) {
10294                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10295                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10296                                            NL80211_CMD_VENDOR);
10297                 if (!hdr)
10298                         break;
10299
10300                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10301                     (wdev && nla_put_u64(skb, NL80211_ATTR_WDEV,
10302                                          wdev_id(wdev)))) {
10303                         genlmsg_cancel(skb, hdr);
10304                         break;
10305                 }
10306
10307                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10308                 if (!vendor_data) {
10309                         genlmsg_cancel(skb, hdr);
10310                         break;
10311                 }
10312
10313                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10314                                    (unsigned long *)&cb->args[5]);
10315                 nla_nest_end(skb, vendor_data);
10316
10317                 if (err == -ENOBUFS || err == -ENOENT) {
10318                         genlmsg_cancel(skb, hdr);
10319                         break;
10320                 } else if (err) {
10321                         genlmsg_cancel(skb, hdr);
10322                         goto out;
10323                 }
10324
10325                 genlmsg_end(skb, hdr);
10326         }
10327
10328         err = skb->len;
10329  out:
10330         rtnl_unlock();
10331         return err;
10332 }
10333
10334 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10335                                            enum nl80211_commands cmd,
10336                                            enum nl80211_attrs attr,
10337                                            int approxlen)
10338 {
10339         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10340
10341         if (WARN_ON(!rdev->cur_cmd_info))
10342                 return NULL;
10343
10344         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10345                                            rdev->cur_cmd_info->snd_portid,
10346                                            rdev->cur_cmd_info->snd_seq,
10347                                            cmd, attr, NULL, GFP_KERNEL);
10348 }
10349 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10350
10351 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10352 {
10353         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10354         void *hdr = ((void **)skb->cb)[1];
10355         struct nlattr *data = ((void **)skb->cb)[2];
10356
10357         /* clear CB data for netlink core to own from now on */
10358         memset(skb->cb, 0, sizeof(skb->cb));
10359
10360         if (WARN_ON(!rdev->cur_cmd_info)) {
10361                 kfree_skb(skb);
10362                 return -EINVAL;
10363         }
10364
10365         nla_nest_end(skb, data);
10366         genlmsg_end(skb, hdr);
10367         return genlmsg_reply(skb, rdev->cur_cmd_info);
10368 }
10369 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10370
10371
10372 static int nl80211_set_qos_map(struct sk_buff *skb,
10373                                struct genl_info *info)
10374 {
10375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10376         struct cfg80211_qos_map *qos_map = NULL;
10377         struct net_device *dev = info->user_ptr[1];
10378         u8 *pos, len, num_des, des_len, des;
10379         int ret;
10380
10381         if (!rdev->ops->set_qos_map)
10382                 return -EOPNOTSUPP;
10383
10384         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10385                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10386                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10387
10388                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10389                     len > IEEE80211_QOS_MAP_LEN_MAX)
10390                         return -EINVAL;
10391
10392                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10393                 if (!qos_map)
10394                         return -ENOMEM;
10395
10396                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10397                 if (num_des) {
10398                         des_len = num_des *
10399                                 sizeof(struct cfg80211_dscp_exception);
10400                         memcpy(qos_map->dscp_exception, pos, des_len);
10401                         qos_map->num_des = num_des;
10402                         for (des = 0; des < num_des; des++) {
10403                                 if (qos_map->dscp_exception[des].up > 7) {
10404                                         kfree(qos_map);
10405                                         return -EINVAL;
10406                                 }
10407                         }
10408                         pos += des_len;
10409                 }
10410                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10411         }
10412
10413         wdev_lock(dev->ieee80211_ptr);
10414         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10415         if (!ret)
10416                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10417         wdev_unlock(dev->ieee80211_ptr);
10418
10419         kfree(qos_map);
10420         return ret;
10421 }
10422
10423 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10424 {
10425         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10426         struct net_device *dev = info->user_ptr[1];
10427         struct wireless_dev *wdev = dev->ieee80211_ptr;
10428         const u8 *peer;
10429         u8 tsid, up;
10430         u16 admitted_time = 0;
10431         int err;
10432
10433         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10434                 return -EOPNOTSUPP;
10435
10436         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10437             !info->attrs[NL80211_ATTR_USER_PRIO])
10438                 return -EINVAL;
10439
10440         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10441         if (tsid >= IEEE80211_NUM_TIDS)
10442                 return -EINVAL;
10443
10444         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10445         if (up >= IEEE80211_NUM_UPS)
10446                 return -EINVAL;
10447
10448         /* WMM uses TIDs 0-7 even for TSPEC */
10449         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10450                 /* TODO: handle 802.11 TSPEC/admission control
10451                  * need more attributes for that (e.g. BA session requirement);
10452                  * change the WMM adminssion test above to allow both then
10453                  */
10454                 return -EINVAL;
10455         }
10456
10457         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10458
10459         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10460                 admitted_time =
10461                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10462                 if (!admitted_time)
10463                         return -EINVAL;
10464         }
10465
10466         wdev_lock(wdev);
10467         switch (wdev->iftype) {
10468         case NL80211_IFTYPE_STATION:
10469         case NL80211_IFTYPE_P2P_CLIENT:
10470                 if (wdev->current_bss)
10471                         break;
10472                 err = -ENOTCONN;
10473                 goto out;
10474         default:
10475                 err = -EOPNOTSUPP;
10476                 goto out;
10477         }
10478
10479         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10480
10481  out:
10482         wdev_unlock(wdev);
10483         return err;
10484 }
10485
10486 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10487 {
10488         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10489         struct net_device *dev = info->user_ptr[1];
10490         struct wireless_dev *wdev = dev->ieee80211_ptr;
10491         const u8 *peer;
10492         u8 tsid;
10493         int err;
10494
10495         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10496                 return -EINVAL;
10497
10498         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10499         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10500
10501         wdev_lock(wdev);
10502         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10503         wdev_unlock(wdev);
10504
10505         return err;
10506 }
10507
10508 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10509                                        struct genl_info *info)
10510 {
10511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10512         struct net_device *dev = info->user_ptr[1];
10513         struct wireless_dev *wdev = dev->ieee80211_ptr;
10514         struct cfg80211_chan_def chandef = {};
10515         const u8 *addr;
10516         u8 oper_class;
10517         int err;
10518
10519         if (!rdev->ops->tdls_channel_switch ||
10520             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10521                 return -EOPNOTSUPP;
10522
10523         switch (dev->ieee80211_ptr->iftype) {
10524         case NL80211_IFTYPE_STATION:
10525         case NL80211_IFTYPE_P2P_CLIENT:
10526                 break;
10527         default:
10528                 return -EOPNOTSUPP;
10529         }
10530
10531         if (!info->attrs[NL80211_ATTR_MAC] ||
10532             !info->attrs[NL80211_ATTR_OPER_CLASS])
10533                 return -EINVAL;
10534
10535         err = nl80211_parse_chandef(rdev, info, &chandef);
10536         if (err)
10537                 return err;
10538
10539         /*
10540          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10541          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10542          * specification is not defined for them.
10543          */
10544         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10545             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10546             chandef.width != NL80211_CHAN_WIDTH_20)
10547                 return -EINVAL;
10548
10549         /* we will be active on the TDLS link */
10550         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10551                                            wdev->iftype))
10552                 return -EINVAL;
10553
10554         /* don't allow switching to DFS channels */
10555         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10556                 return -EINVAL;
10557
10558         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10559         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10560
10561         wdev_lock(wdev);
10562         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10563         wdev_unlock(wdev);
10564
10565         return err;
10566 }
10567
10568 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10569                                               struct genl_info *info)
10570 {
10571         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10572         struct net_device *dev = info->user_ptr[1];
10573         struct wireless_dev *wdev = dev->ieee80211_ptr;
10574         const u8 *addr;
10575
10576         if (!rdev->ops->tdls_channel_switch ||
10577             !rdev->ops->tdls_cancel_channel_switch ||
10578             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10579                 return -EOPNOTSUPP;
10580
10581         switch (dev->ieee80211_ptr->iftype) {
10582         case NL80211_IFTYPE_STATION:
10583         case NL80211_IFTYPE_P2P_CLIENT:
10584                 break;
10585         default:
10586                 return -EOPNOTSUPP;
10587         }
10588
10589         if (!info->attrs[NL80211_ATTR_MAC])
10590                 return -EINVAL;
10591
10592         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10593
10594         wdev_lock(wdev);
10595         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10596         wdev_unlock(wdev);
10597
10598         return 0;
10599 }
10600
10601 #define NL80211_FLAG_NEED_WIPHY         0x01
10602 #define NL80211_FLAG_NEED_NETDEV        0x02
10603 #define NL80211_FLAG_NEED_RTNL          0x04
10604 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10605 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10606                                          NL80211_FLAG_CHECK_NETDEV_UP)
10607 #define NL80211_FLAG_NEED_WDEV          0x10
10608 /* If a netdev is associated, it must be UP, P2P must be started */
10609 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10610                                          NL80211_FLAG_CHECK_NETDEV_UP)
10611 #define NL80211_FLAG_CLEAR_SKB          0x20
10612
10613 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10614                             struct genl_info *info)
10615 {
10616         struct cfg80211_registered_device *rdev;
10617         struct wireless_dev *wdev;
10618         struct net_device *dev;
10619         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10620
10621         if (rtnl)
10622                 rtnl_lock();
10623
10624         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10625                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10626                 if (IS_ERR(rdev)) {
10627                         if (rtnl)
10628                                 rtnl_unlock();
10629                         return PTR_ERR(rdev);
10630                 }
10631                 info->user_ptr[0] = rdev;
10632         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10633                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10634                 ASSERT_RTNL();
10635
10636                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10637                                                   info->attrs);
10638                 if (IS_ERR(wdev)) {
10639                         if (rtnl)
10640                                 rtnl_unlock();
10641                         return PTR_ERR(wdev);
10642                 }
10643
10644                 dev = wdev->netdev;
10645                 rdev = wiphy_to_rdev(wdev->wiphy);
10646
10647                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10648                         if (!dev) {
10649                                 if (rtnl)
10650                                         rtnl_unlock();
10651                                 return -EINVAL;
10652                         }
10653
10654                         info->user_ptr[1] = dev;
10655                 } else {
10656                         info->user_ptr[1] = wdev;
10657                 }
10658
10659                 if (dev) {
10660                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10661                             !netif_running(dev)) {
10662                                 if (rtnl)
10663                                         rtnl_unlock();
10664                                 return -ENETDOWN;
10665                         }
10666
10667                         dev_hold(dev);
10668                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10669                         if (!wdev->p2p_started) {
10670                                 if (rtnl)
10671                                         rtnl_unlock();
10672                                 return -ENETDOWN;
10673                         }
10674                 }
10675
10676                 info->user_ptr[0] = rdev;
10677         }
10678
10679         return 0;
10680 }
10681
10682 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10683                               struct genl_info *info)
10684 {
10685         if (info->user_ptr[1]) {
10686                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10687                         struct wireless_dev *wdev = info->user_ptr[1];
10688
10689                         if (wdev->netdev)
10690                                 dev_put(wdev->netdev);
10691                 } else {
10692                         dev_put(info->user_ptr[1]);
10693                 }
10694         }
10695
10696         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10697                 rtnl_unlock();
10698
10699         /* If needed, clear the netlink message payload from the SKB
10700          * as it might contain key data that shouldn't stick around on
10701          * the heap after the SKB is freed. The netlink message header
10702          * is still needed for further processing, so leave it intact.
10703          */
10704         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10705                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10706
10707                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10708         }
10709 }
10710
10711 static const struct genl_ops nl80211_ops[] = {
10712         {
10713                 .cmd = NL80211_CMD_GET_WIPHY,
10714                 .doit = nl80211_get_wiphy,
10715                 .dumpit = nl80211_dump_wiphy,
10716                 .done = nl80211_dump_wiphy_done,
10717                 .policy = nl80211_policy,
10718                 /* can be retrieved by unprivileged users */
10719                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10720                                   NL80211_FLAG_NEED_RTNL,
10721         },
10722         {
10723                 .cmd = NL80211_CMD_SET_WIPHY,
10724                 .doit = nl80211_set_wiphy,
10725                 .policy = nl80211_policy,
10726                 .flags = GENL_ADMIN_PERM,
10727                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10728         },
10729         {
10730                 .cmd = NL80211_CMD_GET_INTERFACE,
10731                 .doit = nl80211_get_interface,
10732                 .dumpit = nl80211_dump_interface,
10733                 .policy = nl80211_policy,
10734                 /* can be retrieved by unprivileged users */
10735                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10736                                   NL80211_FLAG_NEED_RTNL,
10737         },
10738         {
10739                 .cmd = NL80211_CMD_SET_INTERFACE,
10740                 .doit = nl80211_set_interface,
10741                 .policy = nl80211_policy,
10742                 .flags = GENL_ADMIN_PERM,
10743                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10744                                   NL80211_FLAG_NEED_RTNL,
10745         },
10746         {
10747                 .cmd = NL80211_CMD_NEW_INTERFACE,
10748                 .doit = nl80211_new_interface,
10749                 .policy = nl80211_policy,
10750                 .flags = GENL_ADMIN_PERM,
10751                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10752                                   NL80211_FLAG_NEED_RTNL,
10753         },
10754         {
10755                 .cmd = NL80211_CMD_DEL_INTERFACE,
10756                 .doit = nl80211_del_interface,
10757                 .policy = nl80211_policy,
10758                 .flags = GENL_ADMIN_PERM,
10759                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10760                                   NL80211_FLAG_NEED_RTNL,
10761         },
10762         {
10763                 .cmd = NL80211_CMD_GET_KEY,
10764                 .doit = nl80211_get_key,
10765                 .policy = nl80211_policy,
10766                 .flags = GENL_ADMIN_PERM,
10767                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10768                                   NL80211_FLAG_NEED_RTNL,
10769         },
10770         {
10771                 .cmd = NL80211_CMD_SET_KEY,
10772                 .doit = nl80211_set_key,
10773                 .policy = nl80211_policy,
10774                 .flags = GENL_ADMIN_PERM,
10775                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10776                                   NL80211_FLAG_NEED_RTNL |
10777                                   NL80211_FLAG_CLEAR_SKB,
10778         },
10779         {
10780                 .cmd = NL80211_CMD_NEW_KEY,
10781                 .doit = nl80211_new_key,
10782                 .policy = nl80211_policy,
10783                 .flags = GENL_ADMIN_PERM,
10784                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10785                                   NL80211_FLAG_NEED_RTNL |
10786                                   NL80211_FLAG_CLEAR_SKB,
10787         },
10788         {
10789                 .cmd = NL80211_CMD_DEL_KEY,
10790                 .doit = nl80211_del_key,
10791                 .policy = nl80211_policy,
10792                 .flags = GENL_ADMIN_PERM,
10793                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10794                                   NL80211_FLAG_NEED_RTNL,
10795         },
10796         {
10797                 .cmd = NL80211_CMD_SET_BEACON,
10798                 .policy = nl80211_policy,
10799                 .flags = GENL_ADMIN_PERM,
10800                 .doit = nl80211_set_beacon,
10801                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10802                                   NL80211_FLAG_NEED_RTNL,
10803         },
10804         {
10805                 .cmd = NL80211_CMD_START_AP,
10806                 .policy = nl80211_policy,
10807                 .flags = GENL_ADMIN_PERM,
10808                 .doit = nl80211_start_ap,
10809                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10810                                   NL80211_FLAG_NEED_RTNL,
10811         },
10812         {
10813                 .cmd = NL80211_CMD_STOP_AP,
10814                 .policy = nl80211_policy,
10815                 .flags = GENL_ADMIN_PERM,
10816                 .doit = nl80211_stop_ap,
10817                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10818                                   NL80211_FLAG_NEED_RTNL,
10819         },
10820         {
10821                 .cmd = NL80211_CMD_GET_STATION,
10822                 .doit = nl80211_get_station,
10823                 .dumpit = nl80211_dump_station,
10824                 .policy = nl80211_policy,
10825                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10826                                   NL80211_FLAG_NEED_RTNL,
10827         },
10828         {
10829                 .cmd = NL80211_CMD_SET_STATION,
10830                 .doit = nl80211_set_station,
10831                 .policy = nl80211_policy,
10832                 .flags = GENL_ADMIN_PERM,
10833                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10834                                   NL80211_FLAG_NEED_RTNL,
10835         },
10836         {
10837                 .cmd = NL80211_CMD_NEW_STATION,
10838                 .doit = nl80211_new_station,
10839                 .policy = nl80211_policy,
10840                 .flags = GENL_ADMIN_PERM,
10841                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10842                                   NL80211_FLAG_NEED_RTNL,
10843         },
10844         {
10845                 .cmd = NL80211_CMD_DEL_STATION,
10846                 .doit = nl80211_del_station,
10847                 .policy = nl80211_policy,
10848                 .flags = GENL_ADMIN_PERM,
10849                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10850                                   NL80211_FLAG_NEED_RTNL,
10851         },
10852         {
10853                 .cmd = NL80211_CMD_GET_MPATH,
10854                 .doit = nl80211_get_mpath,
10855                 .dumpit = nl80211_dump_mpath,
10856                 .policy = nl80211_policy,
10857                 .flags = GENL_ADMIN_PERM,
10858                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10859                                   NL80211_FLAG_NEED_RTNL,
10860         },
10861         {
10862                 .cmd = NL80211_CMD_GET_MPP,
10863                 .doit = nl80211_get_mpp,
10864                 .dumpit = nl80211_dump_mpp,
10865                 .policy = nl80211_policy,
10866                 .flags = GENL_ADMIN_PERM,
10867                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10868                                   NL80211_FLAG_NEED_RTNL,
10869         },
10870         {
10871                 .cmd = NL80211_CMD_SET_MPATH,
10872                 .doit = nl80211_set_mpath,
10873                 .policy = nl80211_policy,
10874                 .flags = GENL_ADMIN_PERM,
10875                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10876                                   NL80211_FLAG_NEED_RTNL,
10877         },
10878         {
10879                 .cmd = NL80211_CMD_NEW_MPATH,
10880                 .doit = nl80211_new_mpath,
10881                 .policy = nl80211_policy,
10882                 .flags = GENL_ADMIN_PERM,
10883                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10884                                   NL80211_FLAG_NEED_RTNL,
10885         },
10886         {
10887                 .cmd = NL80211_CMD_DEL_MPATH,
10888                 .doit = nl80211_del_mpath,
10889                 .policy = nl80211_policy,
10890                 .flags = GENL_ADMIN_PERM,
10891                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10892                                   NL80211_FLAG_NEED_RTNL,
10893         },
10894         {
10895                 .cmd = NL80211_CMD_SET_BSS,
10896                 .doit = nl80211_set_bss,
10897                 .policy = nl80211_policy,
10898                 .flags = GENL_ADMIN_PERM,
10899                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10900                                   NL80211_FLAG_NEED_RTNL,
10901         },
10902         {
10903                 .cmd = NL80211_CMD_GET_REG,
10904                 .doit = nl80211_get_reg_do,
10905                 .dumpit = nl80211_get_reg_dump,
10906                 .policy = nl80211_policy,
10907                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10908                 /* can be retrieved by unprivileged users */
10909         },
10910 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
10911         {
10912                 .cmd = NL80211_CMD_SET_REG,
10913                 .doit = nl80211_set_reg,
10914                 .policy = nl80211_policy,
10915                 .flags = GENL_ADMIN_PERM,
10916                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10917         },
10918 #endif
10919         {
10920                 .cmd = NL80211_CMD_REQ_SET_REG,
10921                 .doit = nl80211_req_set_reg,
10922                 .policy = nl80211_policy,
10923                 .flags = GENL_ADMIN_PERM,
10924         },
10925         {
10926                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10927                 .doit = nl80211_get_mesh_config,
10928                 .policy = nl80211_policy,
10929                 /* can be retrieved by unprivileged users */
10930                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10931                                   NL80211_FLAG_NEED_RTNL,
10932         },
10933         {
10934                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10935                 .doit = nl80211_update_mesh_config,
10936                 .policy = nl80211_policy,
10937                 .flags = GENL_ADMIN_PERM,
10938                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10939                                   NL80211_FLAG_NEED_RTNL,
10940         },
10941         {
10942                 .cmd = NL80211_CMD_TRIGGER_SCAN,
10943                 .doit = nl80211_trigger_scan,
10944                 .policy = nl80211_policy,
10945                 .flags = GENL_ADMIN_PERM,
10946                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10947                                   NL80211_FLAG_NEED_RTNL,
10948         },
10949         {
10950                 .cmd = NL80211_CMD_GET_SCAN,
10951                 .policy = nl80211_policy,
10952                 .dumpit = nl80211_dump_scan,
10953         },
10954         {
10955                 .cmd = NL80211_CMD_START_SCHED_SCAN,
10956                 .doit = nl80211_start_sched_scan,
10957                 .policy = nl80211_policy,
10958                 .flags = GENL_ADMIN_PERM,
10959                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10960                                   NL80211_FLAG_NEED_RTNL,
10961         },
10962         {
10963                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
10964                 .doit = nl80211_stop_sched_scan,
10965                 .policy = nl80211_policy,
10966                 .flags = GENL_ADMIN_PERM,
10967                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10968                                   NL80211_FLAG_NEED_RTNL,
10969         },
10970         {
10971                 .cmd = NL80211_CMD_AUTHENTICATE,
10972                 .doit = nl80211_authenticate,
10973                 .policy = nl80211_policy,
10974                 .flags = GENL_ADMIN_PERM,
10975                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10976                                   NL80211_FLAG_NEED_RTNL |
10977                                   NL80211_FLAG_CLEAR_SKB,
10978         },
10979         {
10980                 .cmd = NL80211_CMD_ASSOCIATE,
10981                 .doit = nl80211_associate,
10982                 .policy = nl80211_policy,
10983                 .flags = GENL_ADMIN_PERM,
10984                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10985                                   NL80211_FLAG_NEED_RTNL,
10986         },
10987         {
10988                 .cmd = NL80211_CMD_DEAUTHENTICATE,
10989                 .doit = nl80211_deauthenticate,
10990                 .policy = nl80211_policy,
10991                 .flags = GENL_ADMIN_PERM,
10992                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10993                                   NL80211_FLAG_NEED_RTNL,
10994         },
10995         {
10996                 .cmd = NL80211_CMD_DISASSOCIATE,
10997                 .doit = nl80211_disassociate,
10998                 .policy = nl80211_policy,
10999                 .flags = GENL_ADMIN_PERM,
11000                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11001                                   NL80211_FLAG_NEED_RTNL,
11002         },
11003         {
11004                 .cmd = NL80211_CMD_JOIN_IBSS,
11005                 .doit = nl80211_join_ibss,
11006                 .policy = nl80211_policy,
11007                 .flags = GENL_ADMIN_PERM,
11008                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11009                                   NL80211_FLAG_NEED_RTNL,
11010         },
11011         {
11012                 .cmd = NL80211_CMD_LEAVE_IBSS,
11013                 .doit = nl80211_leave_ibss,
11014                 .policy = nl80211_policy,
11015                 .flags = GENL_ADMIN_PERM,
11016                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11017                                   NL80211_FLAG_NEED_RTNL,
11018         },
11019 #ifdef CONFIG_NL80211_TESTMODE
11020         {
11021                 .cmd = NL80211_CMD_TESTMODE,
11022                 .doit = nl80211_testmode_do,
11023                 .dumpit = nl80211_testmode_dump,
11024                 .policy = nl80211_policy,
11025                 .flags = GENL_ADMIN_PERM,
11026                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11027                                   NL80211_FLAG_NEED_RTNL,
11028         },
11029 #endif
11030         {
11031                 .cmd = NL80211_CMD_CONNECT,
11032                 .doit = nl80211_connect,
11033                 .policy = nl80211_policy,
11034                 .flags = GENL_ADMIN_PERM,
11035                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11036                                   NL80211_FLAG_NEED_RTNL,
11037         },
11038         {
11039                 .cmd = NL80211_CMD_DISCONNECT,
11040                 .doit = nl80211_disconnect,
11041                 .policy = nl80211_policy,
11042                 .flags = GENL_ADMIN_PERM,
11043                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11044                                   NL80211_FLAG_NEED_RTNL,
11045         },
11046         {
11047                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11048                 .doit = nl80211_wiphy_netns,
11049                 .policy = nl80211_policy,
11050                 .flags = GENL_ADMIN_PERM,
11051                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11052                                   NL80211_FLAG_NEED_RTNL,
11053         },
11054         {
11055                 .cmd = NL80211_CMD_GET_SURVEY,
11056                 .policy = nl80211_policy,
11057                 .dumpit = nl80211_dump_survey,
11058         },
11059         {
11060                 .cmd = NL80211_CMD_SET_PMKSA,
11061                 .doit = nl80211_setdel_pmksa,
11062                 .policy = nl80211_policy,
11063                 .flags = GENL_ADMIN_PERM,
11064                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11065                                   NL80211_FLAG_NEED_RTNL,
11066         },
11067         {
11068                 .cmd = NL80211_CMD_DEL_PMKSA,
11069                 .doit = nl80211_setdel_pmksa,
11070                 .policy = nl80211_policy,
11071                 .flags = GENL_ADMIN_PERM,
11072                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11073                                   NL80211_FLAG_NEED_RTNL,
11074         },
11075         {
11076                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11077                 .doit = nl80211_flush_pmksa,
11078                 .policy = nl80211_policy,
11079                 .flags = GENL_ADMIN_PERM,
11080                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11081                                   NL80211_FLAG_NEED_RTNL,
11082         },
11083         {
11084                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11085                 .doit = nl80211_remain_on_channel,
11086                 .policy = nl80211_policy,
11087                 .flags = GENL_ADMIN_PERM,
11088                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11089                                   NL80211_FLAG_NEED_RTNL,
11090         },
11091         {
11092                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11093                 .doit = nl80211_cancel_remain_on_channel,
11094                 .policy = nl80211_policy,
11095                 .flags = GENL_ADMIN_PERM,
11096                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11097                                   NL80211_FLAG_NEED_RTNL,
11098         },
11099         {
11100                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11101                 .doit = nl80211_set_tx_bitrate_mask,
11102                 .policy = nl80211_policy,
11103                 .flags = GENL_ADMIN_PERM,
11104                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11105                                   NL80211_FLAG_NEED_RTNL,
11106         },
11107         {
11108                 .cmd = NL80211_CMD_REGISTER_FRAME,
11109                 .doit = nl80211_register_mgmt,
11110                 .policy = nl80211_policy,
11111                 .flags = GENL_ADMIN_PERM,
11112                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11113                                   NL80211_FLAG_NEED_RTNL,
11114         },
11115         {
11116                 .cmd = NL80211_CMD_FRAME,
11117                 .doit = nl80211_tx_mgmt,
11118                 .policy = nl80211_policy,
11119                 .flags = GENL_ADMIN_PERM,
11120                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11121                                   NL80211_FLAG_NEED_RTNL,
11122         },
11123         {
11124                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11125                 .doit = nl80211_tx_mgmt_cancel_wait,
11126                 .policy = nl80211_policy,
11127                 .flags = GENL_ADMIN_PERM,
11128                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11129                                   NL80211_FLAG_NEED_RTNL,
11130         },
11131         {
11132                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11133                 .doit = nl80211_set_power_save,
11134                 .policy = nl80211_policy,
11135                 .flags = GENL_ADMIN_PERM,
11136                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11137                                   NL80211_FLAG_NEED_RTNL,
11138         },
11139         {
11140                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11141                 .doit = nl80211_get_power_save,
11142                 .policy = nl80211_policy,
11143                 /* can be retrieved by unprivileged users */
11144                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11145                                   NL80211_FLAG_NEED_RTNL,
11146         },
11147         {
11148                 .cmd = NL80211_CMD_SET_CQM,
11149                 .doit = nl80211_set_cqm,
11150                 .policy = nl80211_policy,
11151                 .flags = GENL_ADMIN_PERM,
11152                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11153                                   NL80211_FLAG_NEED_RTNL,
11154         },
11155         {
11156                 .cmd = NL80211_CMD_SET_CHANNEL,
11157                 .doit = nl80211_set_channel,
11158                 .policy = nl80211_policy,
11159                 .flags = GENL_ADMIN_PERM,
11160                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11161                                   NL80211_FLAG_NEED_RTNL,
11162         },
11163         {
11164                 .cmd = NL80211_CMD_SET_WDS_PEER,
11165                 .doit = nl80211_set_wds_peer,
11166                 .policy = nl80211_policy,
11167                 .flags = GENL_ADMIN_PERM,
11168                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11169                                   NL80211_FLAG_NEED_RTNL,
11170         },
11171         {
11172                 .cmd = NL80211_CMD_JOIN_MESH,
11173                 .doit = nl80211_join_mesh,
11174                 .policy = nl80211_policy,
11175                 .flags = GENL_ADMIN_PERM,
11176                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11177                                   NL80211_FLAG_NEED_RTNL,
11178         },
11179         {
11180                 .cmd = NL80211_CMD_LEAVE_MESH,
11181                 .doit = nl80211_leave_mesh,
11182                 .policy = nl80211_policy,
11183                 .flags = GENL_ADMIN_PERM,
11184                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11185                                   NL80211_FLAG_NEED_RTNL,
11186         },
11187         {
11188                 .cmd = NL80211_CMD_JOIN_OCB,
11189                 .doit = nl80211_join_ocb,
11190                 .policy = nl80211_policy,
11191                 .flags = GENL_ADMIN_PERM,
11192                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11193                                   NL80211_FLAG_NEED_RTNL,
11194         },
11195         {
11196                 .cmd = NL80211_CMD_LEAVE_OCB,
11197                 .doit = nl80211_leave_ocb,
11198                 .policy = nl80211_policy,
11199                 .flags = GENL_ADMIN_PERM,
11200                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11201                                   NL80211_FLAG_NEED_RTNL,
11202         },
11203 #ifdef CONFIG_PM
11204         {
11205                 .cmd = NL80211_CMD_GET_WOWLAN,
11206                 .doit = nl80211_get_wowlan,
11207                 .policy = nl80211_policy,
11208                 /* can be retrieved by unprivileged users */
11209                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11210                                   NL80211_FLAG_NEED_RTNL,
11211         },
11212         {
11213                 .cmd = NL80211_CMD_SET_WOWLAN,
11214                 .doit = nl80211_set_wowlan,
11215                 .policy = nl80211_policy,
11216                 .flags = GENL_ADMIN_PERM,
11217                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11218                                   NL80211_FLAG_NEED_RTNL,
11219         },
11220 #endif
11221         {
11222                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11223                 .doit = nl80211_set_rekey_data,
11224                 .policy = nl80211_policy,
11225                 .flags = GENL_ADMIN_PERM,
11226                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11227                                   NL80211_FLAG_NEED_RTNL |
11228                                   NL80211_FLAG_CLEAR_SKB,
11229         },
11230         {
11231                 .cmd = NL80211_CMD_TDLS_MGMT,
11232                 .doit = nl80211_tdls_mgmt,
11233                 .policy = nl80211_policy,
11234                 .flags = GENL_ADMIN_PERM,
11235                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11236                                   NL80211_FLAG_NEED_RTNL,
11237         },
11238         {
11239                 .cmd = NL80211_CMD_TDLS_OPER,
11240                 .doit = nl80211_tdls_oper,
11241                 .policy = nl80211_policy,
11242                 .flags = GENL_ADMIN_PERM,
11243                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11244                                   NL80211_FLAG_NEED_RTNL,
11245         },
11246         {
11247                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11248                 .doit = nl80211_register_unexpected_frame,
11249                 .policy = nl80211_policy,
11250                 .flags = GENL_ADMIN_PERM,
11251                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11252                                   NL80211_FLAG_NEED_RTNL,
11253         },
11254         {
11255                 .cmd = NL80211_CMD_PROBE_CLIENT,
11256                 .doit = nl80211_probe_client,
11257                 .policy = nl80211_policy,
11258                 .flags = GENL_ADMIN_PERM,
11259                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11260                                   NL80211_FLAG_NEED_RTNL,
11261         },
11262         {
11263                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11264                 .doit = nl80211_register_beacons,
11265                 .policy = nl80211_policy,
11266                 .flags = GENL_ADMIN_PERM,
11267                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11268                                   NL80211_FLAG_NEED_RTNL,
11269         },
11270         {
11271                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11272                 .doit = nl80211_set_noack_map,
11273                 .policy = nl80211_policy,
11274                 .flags = GENL_ADMIN_PERM,
11275                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11276                                   NL80211_FLAG_NEED_RTNL,
11277         },
11278         {
11279                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11280                 .doit = nl80211_start_p2p_device,
11281                 .policy = nl80211_policy,
11282                 .flags = GENL_ADMIN_PERM,
11283                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11284                                   NL80211_FLAG_NEED_RTNL,
11285         },
11286         {
11287                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11288                 .doit = nl80211_stop_p2p_device,
11289                 .policy = nl80211_policy,
11290                 .flags = GENL_ADMIN_PERM,
11291                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11292                                   NL80211_FLAG_NEED_RTNL,
11293         },
11294         {
11295                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11296                 .doit = nl80211_set_mcast_rate,
11297                 .policy = nl80211_policy,
11298                 .flags = GENL_ADMIN_PERM,
11299                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11300                                   NL80211_FLAG_NEED_RTNL,
11301         },
11302         {
11303                 .cmd = NL80211_CMD_SET_MAC_ACL,
11304                 .doit = nl80211_set_mac_acl,
11305                 .policy = nl80211_policy,
11306                 .flags = GENL_ADMIN_PERM,
11307                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11308                                   NL80211_FLAG_NEED_RTNL,
11309         },
11310         {
11311                 .cmd = NL80211_CMD_RADAR_DETECT,
11312                 .doit = nl80211_start_radar_detection,
11313                 .policy = nl80211_policy,
11314                 .flags = GENL_ADMIN_PERM,
11315                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11316                                   NL80211_FLAG_NEED_RTNL,
11317         },
11318         {
11319                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11320                 .doit = nl80211_get_protocol_features,
11321                 .policy = nl80211_policy,
11322         },
11323         {
11324                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11325                 .doit = nl80211_update_ft_ies,
11326                 .policy = nl80211_policy,
11327                 .flags = GENL_ADMIN_PERM,
11328                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11329                                   NL80211_FLAG_NEED_RTNL,
11330         },
11331         {
11332                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11333                 .doit = nl80211_crit_protocol_start,
11334                 .policy = nl80211_policy,
11335                 .flags = GENL_ADMIN_PERM,
11336                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11337                                   NL80211_FLAG_NEED_RTNL,
11338         },
11339         {
11340                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11341                 .doit = nl80211_crit_protocol_stop,
11342                 .policy = nl80211_policy,
11343                 .flags = GENL_ADMIN_PERM,
11344                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11345                                   NL80211_FLAG_NEED_RTNL,
11346         },
11347         {
11348                 .cmd = NL80211_CMD_GET_COALESCE,
11349                 .doit = nl80211_get_coalesce,
11350                 .policy = nl80211_policy,
11351                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11352                                   NL80211_FLAG_NEED_RTNL,
11353         },
11354         {
11355                 .cmd = NL80211_CMD_SET_COALESCE,
11356                 .doit = nl80211_set_coalesce,
11357                 .policy = nl80211_policy,
11358                 .flags = GENL_ADMIN_PERM,
11359                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11360                                   NL80211_FLAG_NEED_RTNL,
11361         },
11362         {
11363                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11364                 .doit = nl80211_channel_switch,
11365                 .policy = nl80211_policy,
11366                 .flags = GENL_ADMIN_PERM,
11367                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11368                                   NL80211_FLAG_NEED_RTNL,
11369         },
11370         {
11371                 .cmd = NL80211_CMD_VENDOR,
11372                 .doit = nl80211_vendor_cmd,
11373                 .dumpit = nl80211_vendor_cmd_dump,
11374                 .policy = nl80211_policy,
11375                 .flags = GENL_ADMIN_PERM,
11376                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11377                                   NL80211_FLAG_NEED_RTNL,
11378         },
11379         {
11380                 .cmd = NL80211_CMD_SET_QOS_MAP,
11381                 .doit = nl80211_set_qos_map,
11382                 .policy = nl80211_policy,
11383                 .flags = GENL_ADMIN_PERM,
11384                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11385                                   NL80211_FLAG_NEED_RTNL,
11386         },
11387         {
11388                 .cmd = NL80211_CMD_ADD_TX_TS,
11389                 .doit = nl80211_add_tx_ts,
11390                 .policy = nl80211_policy,
11391                 .flags = GENL_ADMIN_PERM,
11392                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11393                                   NL80211_FLAG_NEED_RTNL,
11394         },
11395         {
11396                 .cmd = NL80211_CMD_DEL_TX_TS,
11397                 .doit = nl80211_del_tx_ts,
11398                 .policy = nl80211_policy,
11399                 .flags = GENL_ADMIN_PERM,
11400                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11401                                   NL80211_FLAG_NEED_RTNL,
11402         },
11403         {
11404                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11405                 .doit = nl80211_tdls_channel_switch,
11406                 .policy = nl80211_policy,
11407                 .flags = GENL_ADMIN_PERM,
11408                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11409                                   NL80211_FLAG_NEED_RTNL,
11410         },
11411         {
11412                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11413                 .doit = nl80211_tdls_cancel_channel_switch,
11414                 .policy = nl80211_policy,
11415                 .flags = GENL_ADMIN_PERM,
11416                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11417                                   NL80211_FLAG_NEED_RTNL,
11418         },
11419 };
11420
11421 /* notification functions */
11422
11423 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11424                           enum nl80211_commands cmd)
11425 {
11426         struct sk_buff *msg;
11427         struct nl80211_dump_wiphy_state state = {};
11428
11429         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11430                 cmd != NL80211_CMD_DEL_WIPHY);
11431
11432         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11433         if (!msg)
11434                 return;
11435
11436         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11437                 nlmsg_free(msg);
11438                 return;
11439         }
11440
11441         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11442                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11443 }
11444
11445 static int nl80211_add_scan_req(struct sk_buff *msg,
11446                                 struct cfg80211_registered_device *rdev)
11447 {
11448         struct cfg80211_scan_request *req = rdev->scan_req;
11449         struct nlattr *nest;
11450         int i;
11451
11452         if (WARN_ON(!req))
11453                 return 0;
11454
11455         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11456         if (!nest)
11457                 goto nla_put_failure;
11458         for (i = 0; i < req->n_ssids; i++) {
11459                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11460                         goto nla_put_failure;
11461         }
11462         nla_nest_end(msg, nest);
11463
11464         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11465         if (!nest)
11466                 goto nla_put_failure;
11467         for (i = 0; i < req->n_channels; i++) {
11468                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11469                         goto nla_put_failure;
11470         }
11471         nla_nest_end(msg, nest);
11472
11473         if (req->ie &&
11474             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11475                 goto nla_put_failure;
11476
11477         if (req->flags &&
11478             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11479                 goto nla_put_failure;
11480
11481         return 0;
11482  nla_put_failure:
11483         return -ENOBUFS;
11484 }
11485
11486 static int nl80211_send_scan_msg(struct sk_buff *msg,
11487                                  struct cfg80211_registered_device *rdev,
11488                                  struct wireless_dev *wdev,
11489                                  u32 portid, u32 seq, int flags,
11490                                  u32 cmd)
11491 {
11492         void *hdr;
11493
11494         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11495         if (!hdr)
11496                 return -1;
11497
11498         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11499             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11500                                          wdev->netdev->ifindex)) ||
11501             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11502                 goto nla_put_failure;
11503
11504         /* ignore errors and send incomplete event anyway */
11505         nl80211_add_scan_req(msg, rdev);
11506
11507         genlmsg_end(msg, hdr);
11508         return 0;
11509
11510  nla_put_failure:
11511         genlmsg_cancel(msg, hdr);
11512         return -EMSGSIZE;
11513 }
11514
11515 static int
11516 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11517                             struct cfg80211_registered_device *rdev,
11518                             struct net_device *netdev,
11519                             u32 portid, u32 seq, int flags, u32 cmd)
11520 {
11521         void *hdr;
11522
11523         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11524         if (!hdr)
11525                 return -1;
11526
11527         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11528             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11529                 goto nla_put_failure;
11530
11531         genlmsg_end(msg, hdr);
11532         return 0;
11533
11534  nla_put_failure:
11535         genlmsg_cancel(msg, hdr);
11536         return -EMSGSIZE;
11537 }
11538
11539 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11540                              struct wireless_dev *wdev)
11541 {
11542         struct sk_buff *msg;
11543
11544         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11545         if (!msg)
11546                 return;
11547
11548         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11549                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11550                 nlmsg_free(msg);
11551                 return;
11552         }
11553
11554         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11555                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11556 }
11557
11558 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11559                                        struct wireless_dev *wdev, bool aborted)
11560 {
11561         struct sk_buff *msg;
11562
11563         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11564         if (!msg)
11565                 return NULL;
11566
11567         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11568                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11569                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11570                 nlmsg_free(msg);
11571                 return NULL;
11572         }
11573
11574         return msg;
11575 }
11576
11577 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11578                               struct sk_buff *msg)
11579 {
11580         if (!msg)
11581                 return;
11582
11583         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11584                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11585 }
11586
11587 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11588                                      struct net_device *netdev)
11589 {
11590         struct sk_buff *msg;
11591
11592         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11593         if (!msg)
11594                 return;
11595
11596         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11597                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11598                 nlmsg_free(msg);
11599                 return;
11600         }
11601
11602         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11603                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11604 }
11605
11606 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11607                              struct net_device *netdev, u32 cmd)
11608 {
11609         struct sk_buff *msg;
11610
11611         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11612         if (!msg)
11613                 return;
11614
11615         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11616                 nlmsg_free(msg);
11617                 return;
11618         }
11619
11620         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11621                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11622 }
11623
11624 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11625                                           struct regulatory_request *request)
11626 {
11627         /* Userspace can always count this one always being set */
11628         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11629                 goto nla_put_failure;
11630
11631         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11632                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11633                                NL80211_REGDOM_TYPE_WORLD))
11634                         goto nla_put_failure;
11635         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11636                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11637                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11638                         goto nla_put_failure;
11639         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11640                    request->intersect) {
11641                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11642                                NL80211_REGDOM_TYPE_INTERSECTION))
11643                         goto nla_put_failure;
11644         } else {
11645                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11646                                NL80211_REGDOM_TYPE_COUNTRY) ||
11647                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11648                                    request->alpha2))
11649                         goto nla_put_failure;
11650         }
11651
11652         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11653                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11654
11655                 if (wiphy &&
11656                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11657                         goto nla_put_failure;
11658
11659                 if (wiphy &&
11660                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11661                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11662                         goto nla_put_failure;
11663         }
11664
11665         return true;
11666
11667 nla_put_failure:
11668         return false;
11669 }
11670
11671 /*
11672  * This can happen on global regulatory changes or device specific settings
11673  * based on custom regulatory domains.
11674  */
11675 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11676                                      struct regulatory_request *request)
11677 {
11678         struct sk_buff *msg;
11679         void *hdr;
11680
11681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11682         if (!msg)
11683                 return;
11684
11685         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11686         if (!hdr) {
11687                 nlmsg_free(msg);
11688                 return;
11689         }
11690
11691         if (nl80211_reg_change_event_fill(msg, request) == false)
11692                 goto nla_put_failure;
11693
11694         genlmsg_end(msg, hdr);
11695
11696         rcu_read_lock();
11697         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11698                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11699         rcu_read_unlock();
11700
11701         return;
11702
11703 nla_put_failure:
11704         genlmsg_cancel(msg, hdr);
11705         nlmsg_free(msg);
11706 }
11707
11708 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11709                                     struct net_device *netdev,
11710                                     const u8 *buf, size_t len,
11711                                     enum nl80211_commands cmd, gfp_t gfp,
11712                                     int uapsd_queues)
11713 {
11714         struct sk_buff *msg;
11715         void *hdr;
11716
11717         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11718         if (!msg)
11719                 return;
11720
11721         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11722         if (!hdr) {
11723                 nlmsg_free(msg);
11724                 return;
11725         }
11726
11727         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11728             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11729             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11730                 goto nla_put_failure;
11731
11732         if (uapsd_queues >= 0) {
11733                 struct nlattr *nla_wmm =
11734                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11735                 if (!nla_wmm)
11736                         goto nla_put_failure;
11737
11738                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11739                                uapsd_queues))
11740                         goto nla_put_failure;
11741
11742                 nla_nest_end(msg, nla_wmm);
11743         }
11744
11745         genlmsg_end(msg, hdr);
11746
11747         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11748                                 NL80211_MCGRP_MLME, gfp);
11749         return;
11750
11751  nla_put_failure:
11752         genlmsg_cancel(msg, hdr);
11753         nlmsg_free(msg);
11754 }
11755
11756 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11757                           struct net_device *netdev, const u8 *buf,
11758                           size_t len, gfp_t gfp)
11759 {
11760         nl80211_send_mlme_event(rdev, netdev, buf, len,
11761                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11762 }
11763
11764 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11765                            struct net_device *netdev, const u8 *buf,
11766                            size_t len, gfp_t gfp, int uapsd_queues)
11767 {
11768         nl80211_send_mlme_event(rdev, netdev, buf, len,
11769                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11770 }
11771
11772 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11773                          struct net_device *netdev, const u8 *buf,
11774                          size_t len, gfp_t gfp)
11775 {
11776         nl80211_send_mlme_event(rdev, netdev, buf, len,
11777                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11778 }
11779
11780 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11781                            struct net_device *netdev, const u8 *buf,
11782                            size_t len, gfp_t gfp)
11783 {
11784         nl80211_send_mlme_event(rdev, netdev, buf, len,
11785                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11786 }
11787
11788 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11789                                   size_t len)
11790 {
11791         struct wireless_dev *wdev = dev->ieee80211_ptr;
11792         struct wiphy *wiphy = wdev->wiphy;
11793         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11794         const struct ieee80211_mgmt *mgmt = (void *)buf;
11795         u32 cmd;
11796
11797         if (WARN_ON(len < 2))
11798                 return;
11799
11800         if (ieee80211_is_deauth(mgmt->frame_control))
11801                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11802         else
11803                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11804
11805         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11806         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11807 }
11808 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11809
11810 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11811                                       struct net_device *netdev, int cmd,
11812                                       const u8 *addr, gfp_t gfp)
11813 {
11814         struct sk_buff *msg;
11815         void *hdr;
11816
11817         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11818         if (!msg)
11819                 return;
11820
11821         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11822         if (!hdr) {
11823                 nlmsg_free(msg);
11824                 return;
11825         }
11826
11827         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11828             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11829             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11830             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11831                 goto nla_put_failure;
11832
11833         genlmsg_end(msg, hdr);
11834
11835         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11836                                 NL80211_MCGRP_MLME, gfp);
11837         return;
11838
11839  nla_put_failure:
11840         genlmsg_cancel(msg, hdr);
11841         nlmsg_free(msg);
11842 }
11843
11844 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11845                                struct net_device *netdev, const u8 *addr,
11846                                gfp_t gfp)
11847 {
11848         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11849                                   addr, gfp);
11850 }
11851
11852 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11853                                 struct net_device *netdev, const u8 *addr,
11854                                 gfp_t gfp)
11855 {
11856         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11857                                   addr, gfp);
11858 }
11859
11860 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11861                                  struct net_device *netdev, const u8 *bssid,
11862                                  const u8 *req_ie, size_t req_ie_len,
11863                                  const u8 *resp_ie, size_t resp_ie_len,
11864                                  u16 status, gfp_t gfp)
11865 {
11866         struct sk_buff *msg;
11867         void *hdr;
11868
11869         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11870         if (!msg)
11871                 return;
11872
11873         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11874         if (!hdr) {
11875                 nlmsg_free(msg);
11876                 return;
11877         }
11878
11879         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11880             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11881             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11882             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11883             (req_ie &&
11884              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11885             (resp_ie &&
11886              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11887                 goto nla_put_failure;
11888
11889         genlmsg_end(msg, hdr);
11890
11891         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11892                                 NL80211_MCGRP_MLME, gfp);
11893         return;
11894
11895  nla_put_failure:
11896         genlmsg_cancel(msg, hdr);
11897         nlmsg_free(msg);
11898
11899 }
11900
11901 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11902                          struct net_device *netdev, const u8 *bssid,
11903                          const u8 *req_ie, size_t req_ie_len,
11904                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11905 {
11906         struct sk_buff *msg;
11907         void *hdr;
11908
11909         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11910         if (!msg)
11911                 return;
11912
11913         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11914         if (!hdr) {
11915                 nlmsg_free(msg);
11916                 return;
11917         }
11918
11919         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11920             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11921             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11922             (req_ie &&
11923              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11924             (resp_ie &&
11925              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11926                 goto nla_put_failure;
11927
11928         genlmsg_end(msg, hdr);
11929
11930         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11931                                 NL80211_MCGRP_MLME, gfp);
11932         return;
11933
11934  nla_put_failure:
11935         genlmsg_cancel(msg, hdr);
11936         nlmsg_free(msg);
11937
11938 }
11939
11940 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11941                                struct net_device *netdev, u16 reason,
11942                                const u8 *ie, size_t ie_len, bool from_ap)
11943 {
11944         struct sk_buff *msg;
11945         void *hdr;
11946
11947         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11948         if (!msg)
11949                 return;
11950
11951         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
11952         if (!hdr) {
11953                 nlmsg_free(msg);
11954                 return;
11955         }
11956
11957         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11958             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11959             (from_ap && reason &&
11960              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
11961             (from_ap &&
11962              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
11963             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
11964                 goto nla_put_failure;
11965
11966         genlmsg_end(msg, hdr);
11967
11968         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11969                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11970         return;
11971
11972  nla_put_failure:
11973         genlmsg_cancel(msg, hdr);
11974         nlmsg_free(msg);
11975
11976 }
11977
11978 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
11979                              struct net_device *netdev, const u8 *bssid,
11980                              gfp_t gfp)
11981 {
11982         struct sk_buff *msg;
11983         void *hdr;
11984
11985         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11986         if (!msg)
11987                 return;
11988
11989         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
11990         if (!hdr) {
11991                 nlmsg_free(msg);
11992                 return;
11993         }
11994
11995         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11996             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11997             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11998                 goto nla_put_failure;
11999
12000         genlmsg_end(msg, hdr);
12001
12002         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12003                                 NL80211_MCGRP_MLME, gfp);
12004         return;
12005
12006  nla_put_failure:
12007         genlmsg_cancel(msg, hdr);
12008         nlmsg_free(msg);
12009 }
12010
12011 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12012                                         const u8* ie, u8 ie_len, gfp_t gfp)
12013 {
12014         struct wireless_dev *wdev = dev->ieee80211_ptr;
12015         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12016         struct sk_buff *msg;
12017         void *hdr;
12018
12019         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12020                 return;
12021
12022         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12023
12024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12025         if (!msg)
12026                 return;
12027
12028         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12029         if (!hdr) {
12030                 nlmsg_free(msg);
12031                 return;
12032         }
12033
12034         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12035             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12036             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12037             (ie_len && ie &&
12038              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12039                 goto nla_put_failure;
12040
12041         genlmsg_end(msg, hdr);
12042
12043         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12044                                 NL80211_MCGRP_MLME, gfp);
12045         return;
12046
12047  nla_put_failure:
12048         genlmsg_cancel(msg, hdr);
12049         nlmsg_free(msg);
12050 }
12051 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12052
12053 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12054                                  struct net_device *netdev, const u8 *addr,
12055                                  enum nl80211_key_type key_type, int key_id,
12056                                  const u8 *tsc, gfp_t gfp)
12057 {
12058         struct sk_buff *msg;
12059         void *hdr;
12060
12061         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12062         if (!msg)
12063                 return;
12064
12065         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12066         if (!hdr) {
12067                 nlmsg_free(msg);
12068                 return;
12069         }
12070
12071         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12072             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12073             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12074             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12075             (key_id != -1 &&
12076              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12077             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12078                 goto nla_put_failure;
12079
12080         genlmsg_end(msg, hdr);
12081
12082         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12083                                 NL80211_MCGRP_MLME, gfp);
12084         return;
12085
12086  nla_put_failure:
12087         genlmsg_cancel(msg, hdr);
12088         nlmsg_free(msg);
12089 }
12090
12091 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12092                                     struct ieee80211_channel *channel_before,
12093                                     struct ieee80211_channel *channel_after)
12094 {
12095         struct sk_buff *msg;
12096         void *hdr;
12097         struct nlattr *nl_freq;
12098
12099         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12100         if (!msg)
12101                 return;
12102
12103         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12104         if (!hdr) {
12105                 nlmsg_free(msg);
12106                 return;
12107         }
12108
12109         /*
12110          * Since we are applying the beacon hint to a wiphy we know its
12111          * wiphy_idx is valid
12112          */
12113         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12114                 goto nla_put_failure;
12115
12116         /* Before */
12117         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12118         if (!nl_freq)
12119                 goto nla_put_failure;
12120         if (nl80211_msg_put_channel(msg, channel_before, false))
12121                 goto nla_put_failure;
12122         nla_nest_end(msg, nl_freq);
12123
12124         /* After */
12125         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12126         if (!nl_freq)
12127                 goto nla_put_failure;
12128         if (nl80211_msg_put_channel(msg, channel_after, false))
12129                 goto nla_put_failure;
12130         nla_nest_end(msg, nl_freq);
12131
12132         genlmsg_end(msg, hdr);
12133
12134         rcu_read_lock();
12135         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12136                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12137         rcu_read_unlock();
12138
12139         return;
12140
12141 nla_put_failure:
12142         genlmsg_cancel(msg, hdr);
12143         nlmsg_free(msg);
12144 }
12145
12146 static void nl80211_send_remain_on_chan_event(
12147         int cmd, struct cfg80211_registered_device *rdev,
12148         struct wireless_dev *wdev, u64 cookie,
12149         struct ieee80211_channel *chan,
12150         unsigned int duration, gfp_t gfp)
12151 {
12152         struct sk_buff *msg;
12153         void *hdr;
12154
12155         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12156         if (!msg)
12157                 return;
12158
12159         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12160         if (!hdr) {
12161                 nlmsg_free(msg);
12162                 return;
12163         }
12164
12165         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12166             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12167                                          wdev->netdev->ifindex)) ||
12168             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12169             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12170             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12171                         NL80211_CHAN_NO_HT) ||
12172             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
12173                 goto nla_put_failure;
12174
12175         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12176             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12177                 goto nla_put_failure;
12178
12179         genlmsg_end(msg, hdr);
12180
12181         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12182                                 NL80211_MCGRP_MLME, gfp);
12183         return;
12184
12185  nla_put_failure:
12186         genlmsg_cancel(msg, hdr);
12187         nlmsg_free(msg);
12188 }
12189
12190 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12191                                struct ieee80211_channel *chan,
12192                                unsigned int duration, gfp_t gfp)
12193 {
12194         struct wiphy *wiphy = wdev->wiphy;
12195         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12196
12197         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12198         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12199                                           rdev, wdev, cookie, chan,
12200                                           duration, gfp);
12201 }
12202 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12203
12204 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12205                                         struct ieee80211_channel *chan,
12206                                         gfp_t gfp)
12207 {
12208         struct wiphy *wiphy = wdev->wiphy;
12209         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12210
12211         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12212         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12213                                           rdev, wdev, cookie, chan, 0, gfp);
12214 }
12215 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12216
12217 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12218                       struct station_info *sinfo, gfp_t gfp)
12219 {
12220         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12221         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12222         struct sk_buff *msg;
12223
12224         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12225
12226         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12227         if (!msg)
12228                 return;
12229
12230         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12231                                  rdev, dev, mac_addr, sinfo) < 0) {
12232                 nlmsg_free(msg);
12233                 return;
12234         }
12235
12236         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12237                                 NL80211_MCGRP_MLME, gfp);
12238 }
12239 EXPORT_SYMBOL(cfg80211_new_sta);
12240
12241 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12242                             struct station_info *sinfo, gfp_t gfp)
12243 {
12244         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12245         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12246         struct sk_buff *msg;
12247         struct station_info empty_sinfo = {};
12248
12249         if (!sinfo)
12250                 sinfo = &empty_sinfo;
12251
12252         trace_cfg80211_del_sta(dev, mac_addr);
12253
12254         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12255         if (!msg)
12256                 return;
12257
12258         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12259                                  rdev, dev, mac_addr, sinfo) < 0) {
12260                 nlmsg_free(msg);
12261                 return;
12262         }
12263
12264         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12265                                 NL80211_MCGRP_MLME, gfp);
12266 }
12267 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12268
12269 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12270                           enum nl80211_connect_failed_reason reason,
12271                           gfp_t gfp)
12272 {
12273         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12274         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12275         struct sk_buff *msg;
12276         void *hdr;
12277
12278         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12279         if (!msg)
12280                 return;
12281
12282         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12283         if (!hdr) {
12284                 nlmsg_free(msg);
12285                 return;
12286         }
12287
12288         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12289             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12290             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12291                 goto nla_put_failure;
12292
12293         genlmsg_end(msg, hdr);
12294
12295         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12296                                 NL80211_MCGRP_MLME, gfp);
12297         return;
12298
12299  nla_put_failure:
12300         genlmsg_cancel(msg, hdr);
12301         nlmsg_free(msg);
12302 }
12303 EXPORT_SYMBOL(cfg80211_conn_failed);
12304
12305 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12306                                        const u8 *addr, gfp_t gfp)
12307 {
12308         struct wireless_dev *wdev = dev->ieee80211_ptr;
12309         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12310         struct sk_buff *msg;
12311         void *hdr;
12312         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12313
12314         if (!nlportid)
12315                 return false;
12316
12317         msg = nlmsg_new(100, gfp);
12318         if (!msg)
12319                 return true;
12320
12321         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12322         if (!hdr) {
12323                 nlmsg_free(msg);
12324                 return true;
12325         }
12326
12327         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12328             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12329             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12330                 goto nla_put_failure;
12331
12332         genlmsg_end(msg, hdr);
12333         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12334         return true;
12335
12336  nla_put_failure:
12337         genlmsg_cancel(msg, hdr);
12338         nlmsg_free(msg);
12339         return true;
12340 }
12341
12342 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12343                                 const u8 *addr, gfp_t gfp)
12344 {
12345         struct wireless_dev *wdev = dev->ieee80211_ptr;
12346         bool ret;
12347
12348         trace_cfg80211_rx_spurious_frame(dev, addr);
12349
12350         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12351                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12352                 trace_cfg80211_return_bool(false);
12353                 return false;
12354         }
12355         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12356                                          addr, gfp);
12357         trace_cfg80211_return_bool(ret);
12358         return ret;
12359 }
12360 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12361
12362 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12363                                         const u8 *addr, gfp_t gfp)
12364 {
12365         struct wireless_dev *wdev = dev->ieee80211_ptr;
12366         bool ret;
12367
12368         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12369
12370         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12371                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12372                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12373                 trace_cfg80211_return_bool(false);
12374                 return false;
12375         }
12376         ret = __nl80211_unexpected_frame(dev,
12377                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12378                                          addr, gfp);
12379         trace_cfg80211_return_bool(ret);
12380         return ret;
12381 }
12382 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12383
12384 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12385                       struct wireless_dev *wdev, u32 nlportid,
12386                       int freq, int sig_dbm,
12387                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12388 {
12389         struct net_device *netdev = wdev->netdev;
12390         struct sk_buff *msg;
12391         void *hdr;
12392
12393         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12394         if (!msg)
12395                 return -ENOMEM;
12396
12397         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12398         if (!hdr) {
12399                 nlmsg_free(msg);
12400                 return -ENOMEM;
12401         }
12402
12403         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12404             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12405                                         netdev->ifindex)) ||
12406             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12407             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12408             (sig_dbm &&
12409              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12410             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12411             (flags &&
12412              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12413                 goto nla_put_failure;
12414
12415         genlmsg_end(msg, hdr);
12416
12417         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12418
12419  nla_put_failure:
12420         genlmsg_cancel(msg, hdr);
12421         nlmsg_free(msg);
12422         return -ENOBUFS;
12423 }
12424
12425 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12426                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12427 {
12428         struct wiphy *wiphy = wdev->wiphy;
12429         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12430         struct net_device *netdev = wdev->netdev;
12431         struct sk_buff *msg;
12432         void *hdr;
12433
12434         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12435
12436         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12437         if (!msg)
12438                 return;
12439
12440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12441         if (!hdr) {
12442                 nlmsg_free(msg);
12443                 return;
12444         }
12445
12446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12447             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12448                                    netdev->ifindex)) ||
12449             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12450             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12451             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12452             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12453                 goto nla_put_failure;
12454
12455         genlmsg_end(msg, hdr);
12456
12457         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12458                                 NL80211_MCGRP_MLME, gfp);
12459         return;
12460
12461  nla_put_failure:
12462         genlmsg_cancel(msg, hdr);
12463         nlmsg_free(msg);
12464 }
12465 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12466
12467 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12468                                             const char *mac, gfp_t gfp)
12469 {
12470         struct wireless_dev *wdev = dev->ieee80211_ptr;
12471         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12472         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12473         void **cb;
12474
12475         if (!msg)
12476                 return NULL;
12477
12478         cb = (void **)msg->cb;
12479
12480         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12481         if (!cb[0]) {
12482                 nlmsg_free(msg);
12483                 return NULL;
12484         }
12485
12486         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12487             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12488                 goto nla_put_failure;
12489
12490         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12491                 goto nla_put_failure;
12492
12493         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12494         if (!cb[1])
12495                 goto nla_put_failure;
12496
12497         cb[2] = rdev;
12498
12499         return msg;
12500  nla_put_failure:
12501         nlmsg_free(msg);
12502         return NULL;
12503 }
12504
12505 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12506 {
12507         void **cb = (void **)msg->cb;
12508         struct cfg80211_registered_device *rdev = cb[2];
12509
12510         nla_nest_end(msg, cb[1]);
12511         genlmsg_end(msg, cb[0]);
12512
12513         memset(msg->cb, 0, sizeof(msg->cb));
12514
12515         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12516                                 NL80211_MCGRP_MLME, gfp);
12517 }
12518
12519 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12520                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12521                               gfp_t gfp)
12522 {
12523         struct sk_buff *msg;
12524
12525         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12526
12527         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12528                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12529                 return;
12530
12531         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12532         if (!msg)
12533                 return;
12534
12535         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12536                         rssi_event))
12537                 goto nla_put_failure;
12538
12539         cfg80211_send_cqm(msg, gfp);
12540
12541         return;
12542
12543  nla_put_failure:
12544         nlmsg_free(msg);
12545 }
12546 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12547
12548 void cfg80211_cqm_txe_notify(struct net_device *dev,
12549                              const u8 *peer, u32 num_packets,
12550                              u32 rate, u32 intvl, gfp_t gfp)
12551 {
12552         struct sk_buff *msg;
12553
12554         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12555         if (!msg)
12556                 return;
12557
12558         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12559                 goto nla_put_failure;
12560
12561         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12562                 goto nla_put_failure;
12563
12564         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12565                 goto nla_put_failure;
12566
12567         cfg80211_send_cqm(msg, gfp);
12568         return;
12569
12570  nla_put_failure:
12571         nlmsg_free(msg);
12572 }
12573 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12574
12575 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12576                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12577 {
12578         struct sk_buff *msg;
12579
12580         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12581
12582         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12583         if (!msg)
12584                 return;
12585
12586         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12587                 goto nla_put_failure;
12588
12589         cfg80211_send_cqm(msg, gfp);
12590         return;
12591
12592  nla_put_failure:
12593         nlmsg_free(msg);
12594 }
12595 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12596
12597 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12598 {
12599         struct sk_buff *msg;
12600
12601         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12602         if (!msg)
12603                 return;
12604
12605         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12606                 goto nla_put_failure;
12607
12608         cfg80211_send_cqm(msg, gfp);
12609         return;
12610
12611  nla_put_failure:
12612         nlmsg_free(msg);
12613 }
12614 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12615
12616 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12617                                      struct net_device *netdev, const u8 *bssid,
12618                                      const u8 *replay_ctr, gfp_t gfp)
12619 {
12620         struct sk_buff *msg;
12621         struct nlattr *rekey_attr;
12622         void *hdr;
12623
12624         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12625         if (!msg)
12626                 return;
12627
12628         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12629         if (!hdr) {
12630                 nlmsg_free(msg);
12631                 return;
12632         }
12633
12634         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12635             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12636             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12637                 goto nla_put_failure;
12638
12639         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12640         if (!rekey_attr)
12641                 goto nla_put_failure;
12642
12643         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12644                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12645                 goto nla_put_failure;
12646
12647         nla_nest_end(msg, rekey_attr);
12648
12649         genlmsg_end(msg, hdr);
12650
12651         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12652                                 NL80211_MCGRP_MLME, gfp);
12653         return;
12654
12655  nla_put_failure:
12656         genlmsg_cancel(msg, hdr);
12657         nlmsg_free(msg);
12658 }
12659
12660 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12661                                const u8 *replay_ctr, gfp_t gfp)
12662 {
12663         struct wireless_dev *wdev = dev->ieee80211_ptr;
12664         struct wiphy *wiphy = wdev->wiphy;
12665         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12666
12667         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12668         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12669 }
12670 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12671
12672 static void
12673 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12674                                struct net_device *netdev, int index,
12675                                const u8 *bssid, bool preauth, gfp_t gfp)
12676 {
12677         struct sk_buff *msg;
12678         struct nlattr *attr;
12679         void *hdr;
12680
12681         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12682         if (!msg)
12683                 return;
12684
12685         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12686         if (!hdr) {
12687                 nlmsg_free(msg);
12688                 return;
12689         }
12690
12691         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12692             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12693                 goto nla_put_failure;
12694
12695         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12696         if (!attr)
12697                 goto nla_put_failure;
12698
12699         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12700             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12701             (preauth &&
12702              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12703                 goto nla_put_failure;
12704
12705         nla_nest_end(msg, attr);
12706
12707         genlmsg_end(msg, hdr);
12708
12709         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12710                                 NL80211_MCGRP_MLME, gfp);
12711         return;
12712
12713  nla_put_failure:
12714         genlmsg_cancel(msg, hdr);
12715         nlmsg_free(msg);
12716 }
12717
12718 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12719                                      const u8 *bssid, bool preauth, gfp_t gfp)
12720 {
12721         struct wireless_dev *wdev = dev->ieee80211_ptr;
12722         struct wiphy *wiphy = wdev->wiphy;
12723         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12724
12725         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12726         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12727 }
12728 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12729
12730 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12731                                      struct net_device *netdev,
12732                                      struct cfg80211_chan_def *chandef,
12733                                      gfp_t gfp,
12734                                      enum nl80211_commands notif,
12735                                      u8 count)
12736 {
12737         struct sk_buff *msg;
12738         void *hdr;
12739
12740         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12741         if (!msg)
12742                 return;
12743
12744         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12745         if (!hdr) {
12746                 nlmsg_free(msg);
12747                 return;
12748         }
12749
12750         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12751                 goto nla_put_failure;
12752
12753         if (nl80211_send_chandef(msg, chandef))
12754                 goto nla_put_failure;
12755
12756         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12757             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12758                         goto nla_put_failure;
12759
12760         genlmsg_end(msg, hdr);
12761
12762         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12763                                 NL80211_MCGRP_MLME, gfp);
12764         return;
12765
12766  nla_put_failure:
12767         genlmsg_cancel(msg, hdr);
12768         nlmsg_free(msg);
12769 }
12770
12771 void cfg80211_ch_switch_notify(struct net_device *dev,
12772                                struct cfg80211_chan_def *chandef)
12773 {
12774         struct wireless_dev *wdev = dev->ieee80211_ptr;
12775         struct wiphy *wiphy = wdev->wiphy;
12776         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12777
12778         ASSERT_WDEV_LOCK(wdev);
12779
12780         trace_cfg80211_ch_switch_notify(dev, chandef);
12781
12782         wdev->chandef = *chandef;
12783         wdev->preset_chandef = *chandef;
12784         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12785                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12786 }
12787 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12788
12789 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12790                                        struct cfg80211_chan_def *chandef,
12791                                        u8 count)
12792 {
12793         struct wireless_dev *wdev = dev->ieee80211_ptr;
12794         struct wiphy *wiphy = wdev->wiphy;
12795         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12796
12797         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12798
12799         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12800                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12801 }
12802 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12803
12804 void
12805 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12806                      const struct cfg80211_chan_def *chandef,
12807                      enum nl80211_radar_event event,
12808                      struct net_device *netdev, gfp_t gfp)
12809 {
12810         struct sk_buff *msg;
12811         void *hdr;
12812
12813         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12814         if (!msg)
12815                 return;
12816
12817         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12818         if (!hdr) {
12819                 nlmsg_free(msg);
12820                 return;
12821         }
12822
12823         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12824                 goto nla_put_failure;
12825
12826         /* NOP and radar events don't need a netdev parameter */
12827         if (netdev) {
12828                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12829
12830                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12831                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12832                         goto nla_put_failure;
12833         }
12834
12835         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12836                 goto nla_put_failure;
12837
12838         if (nl80211_send_chandef(msg, chandef))
12839                 goto nla_put_failure;
12840
12841         genlmsg_end(msg, hdr);
12842
12843         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12844                                 NL80211_MCGRP_MLME, gfp);
12845         return;
12846
12847  nla_put_failure:
12848         genlmsg_cancel(msg, hdr);
12849         nlmsg_free(msg);
12850 }
12851
12852 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12853                            u64 cookie, bool acked, gfp_t gfp)
12854 {
12855         struct wireless_dev *wdev = dev->ieee80211_ptr;
12856         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12857         struct sk_buff *msg;
12858         void *hdr;
12859
12860         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12861
12862         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12863
12864         if (!msg)
12865                 return;
12866
12867         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12868         if (!hdr) {
12869                 nlmsg_free(msg);
12870                 return;
12871         }
12872
12873         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12874             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12875             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12876             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12877             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12878                 goto nla_put_failure;
12879
12880         genlmsg_end(msg, hdr);
12881
12882         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12883                                 NL80211_MCGRP_MLME, gfp);
12884         return;
12885
12886  nla_put_failure:
12887         genlmsg_cancel(msg, hdr);
12888         nlmsg_free(msg);
12889 }
12890 EXPORT_SYMBOL(cfg80211_probe_status);
12891
12892 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12893                                  const u8 *frame, size_t len,
12894                                  int freq, int sig_dbm)
12895 {
12896         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12897         struct sk_buff *msg;
12898         void *hdr;
12899         struct cfg80211_beacon_registration *reg;
12900
12901         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12902
12903         spin_lock_bh(&rdev->beacon_registrations_lock);
12904         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12905                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12906                 if (!msg) {
12907                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12908                         return;
12909                 }
12910
12911                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12912                 if (!hdr)
12913                         goto nla_put_failure;
12914
12915                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12916                     (freq &&
12917                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12918                     (sig_dbm &&
12919                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12920                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12921                         goto nla_put_failure;
12922
12923                 genlmsg_end(msg, hdr);
12924
12925                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12926         }
12927         spin_unlock_bh(&rdev->beacon_registrations_lock);
12928         return;
12929
12930  nla_put_failure:
12931         spin_unlock_bh(&rdev->beacon_registrations_lock);
12932         if (hdr)
12933                 genlmsg_cancel(msg, hdr);
12934         nlmsg_free(msg);
12935 }
12936 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
12937
12938 #ifdef CONFIG_PM
12939 static int cfg80211_net_detect_results(struct sk_buff *msg,
12940                                        struct cfg80211_wowlan_wakeup *wakeup)
12941 {
12942         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
12943         struct nlattr *nl_results, *nl_match, *nl_freqs;
12944         int i, j;
12945
12946         nl_results = nla_nest_start(
12947                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
12948         if (!nl_results)
12949                 return -EMSGSIZE;
12950
12951         for (i = 0; i < nd->n_matches; i++) {
12952                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
12953
12954                 nl_match = nla_nest_start(msg, i);
12955                 if (!nl_match)
12956                         break;
12957
12958                 /* The SSID attribute is optional in nl80211, but for
12959                  * simplicity reasons it's always present in the
12960                  * cfg80211 structure.  If a driver can't pass the
12961                  * SSID, that needs to be changed.  A zero length SSID
12962                  * is still a valid SSID (wildcard), so it cannot be
12963                  * used for this purpose.
12964                  */
12965                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
12966                             match->ssid.ssid)) {
12967                         nla_nest_cancel(msg, nl_match);
12968                         goto out;
12969                 }
12970
12971                 if (match->n_channels) {
12972                         nl_freqs = nla_nest_start(
12973                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
12974                         if (!nl_freqs) {
12975                                 nla_nest_cancel(msg, nl_match);
12976                                 goto out;
12977                         }
12978
12979                         for (j = 0; j < match->n_channels; j++) {
12980                                 if (nla_put_u32(msg, j, match->channels[j])) {
12981                                         nla_nest_cancel(msg, nl_freqs);
12982                                         nla_nest_cancel(msg, nl_match);
12983                                         goto out;
12984                                 }
12985                         }
12986
12987                         nla_nest_end(msg, nl_freqs);
12988                 }
12989
12990                 nla_nest_end(msg, nl_match);
12991         }
12992
12993 out:
12994         nla_nest_end(msg, nl_results);
12995         return 0;
12996 }
12997
12998 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
12999                                    struct cfg80211_wowlan_wakeup *wakeup,
13000                                    gfp_t gfp)
13001 {
13002         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13003         struct sk_buff *msg;
13004         void *hdr;
13005         int size = 200;
13006
13007         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13008
13009         if (wakeup)
13010                 size += wakeup->packet_present_len;
13011
13012         msg = nlmsg_new(size, gfp);
13013         if (!msg)
13014                 return;
13015
13016         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13017         if (!hdr)
13018                 goto free_msg;
13019
13020         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13021             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13022                 goto free_msg;
13023
13024         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13025                                         wdev->netdev->ifindex))
13026                 goto free_msg;
13027
13028         if (wakeup) {
13029                 struct nlattr *reasons;
13030
13031                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13032                 if (!reasons)
13033                         goto free_msg;
13034
13035                 if (wakeup->disconnect &&
13036                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13037                         goto free_msg;
13038                 if (wakeup->magic_pkt &&
13039                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13040                         goto free_msg;
13041                 if (wakeup->gtk_rekey_failure &&
13042                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13043                         goto free_msg;
13044                 if (wakeup->eap_identity_req &&
13045                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13046                         goto free_msg;
13047                 if (wakeup->four_way_handshake &&
13048                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13049                         goto free_msg;
13050                 if (wakeup->rfkill_release &&
13051                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13052                         goto free_msg;
13053
13054                 if (wakeup->pattern_idx >= 0 &&
13055                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13056                                 wakeup->pattern_idx))
13057                         goto free_msg;
13058
13059                 if (wakeup->tcp_match &&
13060                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13061                         goto free_msg;
13062
13063                 if (wakeup->tcp_connlost &&
13064                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13065                         goto free_msg;
13066
13067                 if (wakeup->tcp_nomoretokens &&
13068                     nla_put_flag(msg,
13069                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13070                         goto free_msg;
13071
13072                 if (wakeup->packet) {
13073                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13074                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13075
13076                         if (!wakeup->packet_80211) {
13077                                 pkt_attr =
13078                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13079                                 len_attr =
13080                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13081                         }
13082
13083                         if (wakeup->packet_len &&
13084                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13085                                 goto free_msg;
13086
13087                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13088                                     wakeup->packet))
13089                                 goto free_msg;
13090                 }
13091
13092                 if (wakeup->net_detect &&
13093                     cfg80211_net_detect_results(msg, wakeup))
13094                                 goto free_msg;
13095
13096                 nla_nest_end(msg, reasons);
13097         }
13098
13099         genlmsg_end(msg, hdr);
13100
13101         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13102                                 NL80211_MCGRP_MLME, gfp);
13103         return;
13104
13105  free_msg:
13106         nlmsg_free(msg);
13107 }
13108 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13109 #endif
13110
13111 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13112                                 enum nl80211_tdls_operation oper,
13113                                 u16 reason_code, gfp_t gfp)
13114 {
13115         struct wireless_dev *wdev = dev->ieee80211_ptr;
13116         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13117         struct sk_buff *msg;
13118         void *hdr;
13119
13120         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13121                                          reason_code);
13122
13123         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13124         if (!msg)
13125                 return;
13126
13127         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13128         if (!hdr) {
13129                 nlmsg_free(msg);
13130                 return;
13131         }
13132
13133         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13134             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13135             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13136             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13137             (reason_code > 0 &&
13138              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13139                 goto nla_put_failure;
13140
13141         genlmsg_end(msg, hdr);
13142
13143         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13144                                 NL80211_MCGRP_MLME, gfp);
13145         return;
13146
13147  nla_put_failure:
13148         genlmsg_cancel(msg, hdr);
13149         nlmsg_free(msg);
13150 }
13151 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13152
13153 static int nl80211_netlink_notify(struct notifier_block * nb,
13154                                   unsigned long state,
13155                                   void *_notify)
13156 {
13157         struct netlink_notify *notify = _notify;
13158         struct cfg80211_registered_device *rdev;
13159         struct wireless_dev *wdev;
13160         struct cfg80211_beacon_registration *reg, *tmp;
13161
13162         if (state != NETLINK_URELEASE)
13163                 return NOTIFY_DONE;
13164
13165         rcu_read_lock();
13166
13167         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13168                 bool schedule_destroy_work = false;
13169                 bool schedule_scan_stop = false;
13170                 struct cfg80211_sched_scan_request *sched_scan_req =
13171                         rcu_dereference(rdev->sched_scan_req);
13172
13173                 if (sched_scan_req && notify->portid &&
13174                     sched_scan_req->owner_nlportid == notify->portid)
13175                         schedule_scan_stop = true;
13176
13177                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13178                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13179
13180                         if (wdev->owner_nlportid == notify->portid)
13181                                 schedule_destroy_work = true;
13182                 }
13183
13184                 spin_lock_bh(&rdev->beacon_registrations_lock);
13185                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13186                                          list) {
13187                         if (reg->nlportid == notify->portid) {
13188                                 list_del(&reg->list);
13189                                 kfree(reg);
13190                                 break;
13191                         }
13192                 }
13193                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13194
13195                 if (schedule_destroy_work) {
13196                         struct cfg80211_iface_destroy *destroy;
13197
13198                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13199                         if (destroy) {
13200                                 destroy->nlportid = notify->portid;
13201                                 spin_lock(&rdev->destroy_list_lock);
13202                                 list_add(&destroy->list, &rdev->destroy_list);
13203                                 spin_unlock(&rdev->destroy_list_lock);
13204                                 schedule_work(&rdev->destroy_work);
13205                         }
13206                 } else if (schedule_scan_stop) {
13207                         sched_scan_req->owner_nlportid = 0;
13208
13209                         if (rdev->ops->sched_scan_stop &&
13210                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13211                                 schedule_work(&rdev->sched_scan_stop_wk);
13212                 }
13213         }
13214
13215         rcu_read_unlock();
13216
13217         /*
13218          * It is possible that the user space process that is controlling the
13219          * indoor setting disappeared, so notify the regulatory core.
13220          */
13221         regulatory_netlink_notify(notify->portid);
13222         return NOTIFY_OK;
13223 }
13224
13225 static struct notifier_block nl80211_netlink_notifier = {
13226         .notifier_call = nl80211_netlink_notify,
13227 };
13228
13229 void cfg80211_ft_event(struct net_device *netdev,
13230                        struct cfg80211_ft_event_params *ft_event)
13231 {
13232         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13233         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13234         struct sk_buff *msg;
13235         void *hdr;
13236
13237         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13238
13239         if (!ft_event->target_ap)
13240                 return;
13241
13242         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13243         if (!msg)
13244                 return;
13245
13246         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13247         if (!hdr)
13248                 goto out;
13249
13250         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13251             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13252             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13253                 goto out;
13254
13255         if (ft_event->ies &&
13256             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13257                 goto out;
13258         if (ft_event->ric_ies &&
13259             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13260                     ft_event->ric_ies))
13261                 goto out;
13262
13263         genlmsg_end(msg, hdr);
13264
13265         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13266                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13267         return;
13268  out:
13269         nlmsg_free(msg);
13270 }
13271 EXPORT_SYMBOL(cfg80211_ft_event);
13272
13273 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13274 {
13275         struct cfg80211_registered_device *rdev;
13276         struct sk_buff *msg;
13277         void *hdr;
13278         u32 nlportid;
13279
13280         rdev = wiphy_to_rdev(wdev->wiphy);
13281         if (!rdev->crit_proto_nlportid)
13282                 return;
13283
13284         nlportid = rdev->crit_proto_nlportid;
13285         rdev->crit_proto_nlportid = 0;
13286
13287         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13288         if (!msg)
13289                 return;
13290
13291         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13292         if (!hdr)
13293                 goto nla_put_failure;
13294
13295         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13296             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13297                 goto nla_put_failure;
13298
13299         genlmsg_end(msg, hdr);
13300
13301         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13302         return;
13303
13304  nla_put_failure:
13305         if (hdr)
13306                 genlmsg_cancel(msg, hdr);
13307         nlmsg_free(msg);
13308
13309 }
13310 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13311
13312 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13313 {
13314         struct wiphy *wiphy = wdev->wiphy;
13315         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13316         struct sk_buff *msg;
13317         void *hdr;
13318
13319         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13320         if (!msg)
13321                 return;
13322
13323         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13324         if (!hdr)
13325                 goto out;
13326
13327         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13328             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13329             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13330                 goto out;
13331
13332         genlmsg_end(msg, hdr);
13333
13334         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13335                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13336         return;
13337  out:
13338         nlmsg_free(msg);
13339 }
13340
13341 /* initialisation/exit functions */
13342
13343 int nl80211_init(void)
13344 {
13345         int err;
13346
13347         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13348                                                    nl80211_mcgrps);
13349         if (err)
13350                 return err;
13351
13352         err = netlink_register_notifier(&nl80211_netlink_notifier);
13353         if (err)
13354                 goto err_out;
13355
13356         return 0;
13357  err_out:
13358         genl_unregister_family(&nl80211_fam);
13359         return err;
13360 }
13361
13362 void nl80211_exit(void)
13363 {
13364         netlink_unregister_notifier(&nl80211_netlink_notifier);
13365         genl_unregister_family(&nl80211_fam);
13366 }