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         if (!cb->args[0]) {
 496                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 497                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 498                                   nl80211_policy);
 499                 if (err)
 500                         return err;
 501
 502                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 503                                                    nl80211_fam.attrbuf);
 504                 if (IS_ERR(*wdev))
 505                         return PTR_ERR(*wdev);
 506                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 507                 /* 0 is the first index - add 1 to parse only once */
 508                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 509                 cb->args[1] = (*wdev)->identifier;
 510         } else {
 511                 /* subtract the 1 again here */
 512                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 513                 struct wireless_dev *tmp;
 514
 515                 if (!wiphy)
 516                         return -ENODEV;
 517                 *rdev = wiphy_to_rdev(wiphy);
 518                 *wdev = NULL;
 519
 520                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 521                         if (tmp->identifier == cb->args[1]) {
 522                                 *wdev = tmp;
 523                                 break;
 524                         }
 525                 }
 526
 527                 if (!*wdev)
 528                         return -ENODEV;
 529         }
 530
 531         return 0;
 532 }
 533
 534 /* IE validation */
 535 static bool is_valid_ie_attr(const struct nlattr *attr)
 536 {
 537         const u8 *pos;
 538         int len;
 539
 540         if (!attr)
 541                 return true;
 542
 543         pos = nla_data(attr);
 544         len = nla_len(attr);
 545
 546         while (len) {
 547                 u8 elemlen;
 548
 549                 if (len < 2)
 550                         return false;
 551                 len -= 2;
 552
 553                 elemlen = pos[1];
 554                 if (elemlen > len)
 555                         return false;
 556
 557                 len -= elemlen;
 558                 pos += 2 + elemlen;
 559         }
 560
 561         return true;
 562 }
 563
 564 /* message building helper */
 565 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 566                                    int flags, u8 cmd)
 567 {
 568         /* since there is no private header just add the generic one */
 569         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 570 }
 571
 572 static int nl80211_msg_put_channel(struct sk_buff *msg,
 573                                    struct ieee80211_channel *chan,
 574                                    bool large)
 575 {
 576         /* Some channels must be completely excluded from the
 577          * list to protect old user-space tools from breaking
 578          */
 579         if (!large && chan->flags &
 580             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 581                 return 0;
 582
 583         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 584                         chan->center_freq))
 585                 goto nla_put_failure;
 586
 587         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 588             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 589                 goto nla_put_failure;
 590         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 591                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 592                         goto nla_put_failure;
 593                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 594                         goto nla_put_failure;
 595         }
 596         if (chan->flags & IEEE80211_CHAN_RADAR) {
 597                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 598                         goto nla_put_failure;
 599                 if (large) {
 600                         u32 time;
 601
 602                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 603
 604                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 605                                         chan->dfs_state))
 606                                 goto nla_put_failure;
 607                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 608                                         time))
 609                                 goto nla_put_failure;
 610                         if (nla_put_u32(msg,
 611                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 612                                         chan->dfs_cac_ms))
 613                                 goto nla_put_failure;
 614                 }
 615         }
 616
 617         if (large) {
 618                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 619                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 620                         goto nla_put_failure;
 621                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 622                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 623                         goto nla_put_failure;
 624                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 625                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 626                         goto nla_put_failure;
 627                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 628                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 629                         goto nla_put_failure;
 630                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 631                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 632                         goto nla_put_failure;
 633                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 634                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 635                         goto nla_put_failure;
 636                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 637                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 638                         goto nla_put_failure;
 639                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 640                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 641                         goto nla_put_failure;
 642         }
 643
 644         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 645                         DBM_TO_MBM(chan->max_power)))
 646                 goto nla_put_failure;
 647
 648         return 0;
 649
 650  nla_put_failure:
 651         return -ENOBUFS;
 652 }
 653
 654 /* netlink command implementations */
 655
 656 struct key_parse {
 657         struct key_params p;
 658         int idx;
 659         int type;
 660         bool def, defmgmt;
 661         bool def_uni, def_multi;
 662 };
 663
 664 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 665 {
 666         struct nlattr *tb[NL80211_KEY_MAX + 1];
 667         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 668                                    nl80211_key_policy);
 669         if (err)
 670                 return err;
 671
 672         k->def = !!tb[NL80211_KEY_DEFAULT];
 673         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 674
 675         if (k->def) {
 676                 k->def_uni = true;
 677                 k->def_multi = true;
 678         }
 679         if (k->defmgmt)
 680                 k->def_multi = true;
 681
 682         if (tb[NL80211_KEY_IDX])
 683                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 684
 685         if (tb[NL80211_KEY_DATA]) {
 686                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 687                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 688         }
 689
 690         if (tb[NL80211_KEY_SEQ]) {
 691                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 692                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 693         }
 694
 695         if (tb[NL80211_KEY_CIPHER])
 696                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 697
 698         if (tb[NL80211_KEY_TYPE]) {
 699                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 700                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 701                         return -EINVAL;
 702         }
 703
 704         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 705                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 706                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 707                                        tb[NL80211_KEY_DEFAULT_TYPES],
 708                                        nl80211_key_default_policy);
 709                 if (err)
 710                         return err;
 711
 712                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 713                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 714         }
 715
 716         return 0;
 717 }
 718
 719 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 720 {
 721         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 722                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 723                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 724         }
 725
 726         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 727                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 728                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 729         }
 730
 731         if (info->attrs[NL80211_ATTR_KEY_IDX])
 732                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 733
 734         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 735                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 736
 737         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 738         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 739
 740         if (k->def) {
 741                 k->def_uni = true;
 742                 k->def_multi = true;
 743         }
 744         if (k->defmgmt)
 745                 k->def_multi = true;
 746
 747         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 748                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 749                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 750                         return -EINVAL;
 751         }
 752
 753         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 754                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 755                 int err = nla_parse_nested(
 756                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 757                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 758                                 nl80211_key_default_policy);
 759                 if (err)
 760                         return err;
 761
 762                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 763                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 764         }
 765
 766         return 0;
 767 }
 768
 769 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 770 {
 771         int err;
 772
 773         memset(k, 0, sizeof(*k));
 774         k->idx = -1;
 775         k->type = -1;
 776
 777         if (info->attrs[NL80211_ATTR_KEY])
 778                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 779         else
 780                 err = nl80211_parse_key_old(info, k);
 781
 782         if (err)
 783                 return err;
 784
 785         if (k->def && k->defmgmt)
 786                 return -EINVAL;
 787
 788         if (k->defmgmt) {
 789                 if (k->def_uni || !k->def_multi)
 790                         return -EINVAL;
 791         }
 792
 793         if (k->idx != -1) {
 794                 if (k->defmgmt) {
 795                         if (k->idx < 4 || k->idx > 5)
 796                                 return -EINVAL;
 797                 } else if (k->def) {
 798                         if (k->idx < 0 || k->idx > 3)
 799                                 return -EINVAL;
 800                 } else {
 801                         if (k->idx < 0 || k->idx > 5)
 802                                 return -EINVAL;
 803                 }
 804         }
 805
 806         return 0;
 807 }
 808
 809 static struct cfg80211_cached_keys *
 810 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 811                        struct nlattr *keys, bool *no_ht)
 812 {
 813         struct key_parse parse;
 814         struct nlattr *key;
 815         struct cfg80211_cached_keys *result;
 816         int rem, err, def = 0;
 817
 818         result = kzalloc(sizeof(*result), GFP_KERNEL);
 819         if (!result)
 820                 return ERR_PTR(-ENOMEM);
 821
 822         result->def = -1;
 823         result->defmgmt = -1;
 824
 825         nla_for_each_nested(key, keys, rem) {
 826                 memset(&parse, 0, sizeof(parse));
 827                 parse.idx = -1;
 828
 829                 err = nl80211_parse_key_new(key, &parse);
 830                 if (err)
 831                         goto error;
 832                 err = -EINVAL;
 833                 if (!parse.p.key)
 834                         goto error;
 835                 if (parse.idx < 0 || parse.idx > 4)
 836                         goto error;
 837                 if (parse.def) {
 838                         if (def)
 839                                 goto error;
 840                         def = 1;
 841                         result->def = parse.idx;
 842                         if (!parse.def_uni || !parse.def_multi)
 843                                 goto error;
 844                 } else if (parse.defmgmt)
 845                         goto error;
 846                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 847                                                      parse.idx, false, NULL);
 848                 if (err)
 849                         goto error;
 850                 result->params[parse.idx].cipher = parse.p.cipher;
 851                 result->params[parse.idx].key_len = parse.p.key_len;
 852                 result->params[parse.idx].key = result->data[parse.idx];
 853                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 854
 855                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 856                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 857                         if (no_ht)
 858                                 *no_ht = true;
 859                 }
 860         }
 861
 862         return result;
 863  error:
 864         kfree(result);
 865         return ERR_PTR(err);
 866 }
 867
 868 static int nl80211_key_allowed(struct wireless_dev *wdev)
 869 {
 870         ASSERT_WDEV_LOCK(wdev);
 871
 872         switch (wdev->iftype) {
 873         case NL80211_IFTYPE_AP:
 874         case NL80211_IFTYPE_AP_VLAN:
 875         case NL80211_IFTYPE_P2P_GO:
 876         case NL80211_IFTYPE_MESH_POINT:
 877                 break;
 878         case NL80211_IFTYPE_ADHOC:
 879         case NL80211_IFTYPE_STATION:
 880         case NL80211_IFTYPE_P2P_CLIENT:
 881                 if (!wdev->current_bss)
 882                         return -ENOLINK;
 883                 break;
 884         case NL80211_IFTYPE_UNSPECIFIED:
 885         case NL80211_IFTYPE_OCB:
 886         case NL80211_IFTYPE_MONITOR:
 887         case NL80211_IFTYPE_P2P_DEVICE:
 888         case NL80211_IFTYPE_WDS:
 889         case NUM_NL80211_IFTYPES:
 890                 return -EINVAL;
 891         }
 892
 893         return 0;
 894 }
 895
 896 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 897                                                         struct nlattr *tb)
 898 {
 899         struct ieee80211_channel *chan;
 900
 901         if (tb == NULL)
 902                 return NULL;
 903         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 904         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 905                 return NULL;
 906         return chan;
 907 }
 908
 909 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 910 {
 911         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 912         int i;
 913
 914         if (!nl_modes)
 915                 goto nla_put_failure;
 916
 917         i = 0;
 918         while (ifmodes) {
 919                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 920                         goto nla_put_failure;
 921                 ifmodes >>= 1;
 922                 i++;
 923         }
 924
 925         nla_nest_end(msg, nl_modes);
 926         return 0;
 927
 928 nla_put_failure:
 929         return -ENOBUFS;
 930 }
 931
 932 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 933                                           struct sk_buff *msg,
 934                                           bool large)
 935 {
 936         struct nlattr *nl_combis;
 937         int i, j;
 938
 939         nl_combis = nla_nest_start(msg,
 940                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 941         if (!nl_combis)
 942                 goto nla_put_failure;
 943
 944         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 945                 const struct ieee80211_iface_combination *c;
 946                 struct nlattr *nl_combi, *nl_limits;
 947
 948                 c = &wiphy->iface_combinations[i];
 949
 950                 nl_combi = nla_nest_start(msg, i + 1);
 951                 if (!nl_combi)
 952                         goto nla_put_failure;
 953
 954                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 955                 if (!nl_limits)
 956                         goto nla_put_failure;
 957
 958                 for (j = 0; j < c->n_limits; j++) {
 959                         struct nlattr *nl_limit;
 960
 961                         nl_limit = nla_nest_start(msg, j + 1);
 962                         if (!nl_limit)
 963                                 goto nla_put_failure;
 964                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 965                                         c->limits[j].max))
 966                                 goto nla_put_failure;
 967                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 968                                                 c->limits[j].types))
 969                                 goto nla_put_failure;
 970                         nla_nest_end(msg, nl_limit);
 971                 }
 972
 973                 nla_nest_end(msg, nl_limits);
 974
 975                 if (c->beacon_int_infra_match &&
 976                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 977                         goto nla_put_failure;
 978                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 979                                 c->num_different_channels) ||
 980                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 981                                 c->max_interfaces))
 982                         goto nla_put_failure;
 983                 if (large &&
 984                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 985                                 c->radar_detect_widths) ||
 986                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
 987                                 c->radar_detect_regions)))
 988                         goto nla_put_failure;
 989
 990                 nla_nest_end(msg, nl_combi);
 991         }
 992
 993         nla_nest_end(msg, nl_combis);
 994
 995         return 0;
 996 nla_put_failure:
 997         return -ENOBUFS;
 998 }
 999
1000 #ifdef CONFIG_PM
1001 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1002                                         struct sk_buff *msg)
1003 {
1004         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1005         struct nlattr *nl_tcp;
1006
1007         if (!tcp)
1008                 return 0;
1009
1010         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1011         if (!nl_tcp)
1012                 return -ENOBUFS;
1013
1014         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1015                         tcp->data_payload_max))
1016                 return -ENOBUFS;
1017
1018         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1019                         tcp->data_payload_max))
1020                 return -ENOBUFS;
1021
1022         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1023                 return -ENOBUFS;
1024
1025         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1026                                 sizeof(*tcp->tok), tcp->tok))
1027                 return -ENOBUFS;
1028
1029         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1030                         tcp->data_interval_max))
1031                 return -ENOBUFS;
1032
1033         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1034                         tcp->wake_payload_max))
1035                 return -ENOBUFS;
1036
1037         nla_nest_end(msg, nl_tcp);
1038         return 0;
1039 }
1040
1041 static int nl80211_send_wowlan(struct sk_buff *msg,
1042                                struct cfg80211_registered_device *rdev,
1043                                bool large)
1044 {
1045         struct nlattr *nl_wowlan;
1046
1047         if (!rdev->wiphy.wowlan)
1048                 return 0;
1049
1050         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1051         if (!nl_wowlan)
1052                 return -ENOBUFS;
1053
1054         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1055              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1056             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1057              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1058             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1059              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1060             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1061              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1062             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1063              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1064             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1065              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1066             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1067              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1068             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1069              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1070                 return -ENOBUFS;
1071
1072         if (rdev->wiphy.wowlan->n_patterns) {
1073                 struct nl80211_pattern_support pat = {
1074                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1075                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1076                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1077                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1078                 };
1079
1080                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1081                             sizeof(pat), &pat))
1082                         return -ENOBUFS;
1083         }
1084
1085         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1086             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1087                         rdev->wiphy.wowlan->max_nd_match_sets))
1088                 return -ENOBUFS;
1089
1090         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1091                 return -ENOBUFS;
1092
1093         nla_nest_end(msg, nl_wowlan);
1094
1095         return 0;
1096 }
1097 #endif
1098
1099 static int nl80211_send_coalesce(struct sk_buff *msg,
1100                                  struct cfg80211_registered_device *rdev)
1101 {
1102         struct nl80211_coalesce_rule_support rule;
1103
1104         if (!rdev->wiphy.coalesce)
1105                 return 0;
1106
1107         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1108         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1109         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1110         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1111         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1112         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1113
1114         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1115                 return -ENOBUFS;
1116
1117         return 0;
1118 }
1119
1120 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1121                                       struct ieee80211_supported_band *sband)
1122 {
1123         struct nlattr *nl_rates, *nl_rate;
1124         struct ieee80211_rate *rate;
1125         int i;
1126
1127         /* add HT info */
1128         if (sband->ht_cap.ht_supported &&
1129             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1130                      sizeof(sband->ht_cap.mcs),
1131                      &sband->ht_cap.mcs) ||
1132              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1133                          sband->ht_cap.cap) ||
1134              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1135                         sband->ht_cap.ampdu_factor) ||
1136              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1137                         sband->ht_cap.ampdu_density)))
1138                 return -ENOBUFS;
1139
1140         /* add VHT info */
1141         if (sband->vht_cap.vht_supported &&
1142             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1143                      sizeof(sband->vht_cap.vht_mcs),
1144                      &sband->vht_cap.vht_mcs) ||
1145              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1146                          sband->vht_cap.cap)))
1147                 return -ENOBUFS;
1148
1149         /* add bitrates */
1150         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1151         if (!nl_rates)
1152                 return -ENOBUFS;
1153
1154         for (i = 0; i < sband->n_bitrates; i++) {
1155                 nl_rate = nla_nest_start(msg, i);
1156                 if (!nl_rate)
1157                         return -ENOBUFS;
1158
1159                 rate = &sband->bitrates[i];
1160                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1161                                 rate->bitrate))
1162                         return -ENOBUFS;
1163                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1164                     nla_put_flag(msg,
1165                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1166                         return -ENOBUFS;
1167
1168                 nla_nest_end(msg, nl_rate);
1169         }
1170
1171         nla_nest_end(msg, nl_rates);
1172
1173         return 0;
1174 }
1175
1176 static int
1177 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1178                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1179 {
1180         u16 stypes;
1181         struct nlattr *nl_ftypes, *nl_ifs;
1182         enum nl80211_iftype ift;
1183         int i;
1184
1185         if (!mgmt_stypes)
1186                 return 0;
1187
1188         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1189         if (!nl_ifs)
1190                 return -ENOBUFS;
1191
1192         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1193                 nl_ftypes = nla_nest_start(msg, ift);
1194                 if (!nl_ftypes)
1195                         return -ENOBUFS;
1196                 i = 0;
1197                 stypes = mgmt_stypes[ift].tx;
1198                 while (stypes) {
1199                         if ((stypes & 1) &&
1200                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1201                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1202                                 return -ENOBUFS;
1203                         stypes >>= 1;
1204                         i++;
1205                 }
1206                 nla_nest_end(msg, nl_ftypes);
1207         }
1208
1209         nla_nest_end(msg, nl_ifs);
1210
1211         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1212         if (!nl_ifs)
1213                 return -ENOBUFS;
1214
1215         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1216                 nl_ftypes = nla_nest_start(msg, ift);
1217                 if (!nl_ftypes)
1218                         return -ENOBUFS;
1219                 i = 0;
1220                 stypes = mgmt_stypes[ift].rx;
1221                 while (stypes) {
1222                         if ((stypes & 1) &&
1223                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1224                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1225                                 return -ENOBUFS;
1226                         stypes >>= 1;
1227                         i++;
1228                 }
1229                 nla_nest_end(msg, nl_ftypes);
1230         }
1231         nla_nest_end(msg, nl_ifs);
1232
1233         return 0;
1234 }
1235
1236 struct nl80211_dump_wiphy_state {
1237         s64 filter_wiphy;
1238         long start;
1239         long split_start, band_start, chan_start;
1240         bool split;
1241 };
1242
1243 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1244                               enum nl80211_commands cmd,
1245                               struct sk_buff *msg, u32 portid, u32 seq,
1246                               int flags, struct nl80211_dump_wiphy_state *state)
1247 {
1248         void *hdr;
1249         struct nlattr *nl_bands, *nl_band;
1250         struct nlattr *nl_freqs, *nl_freq;
1251         struct nlattr *nl_cmds;
1252         enum ieee80211_band band;
1253         struct ieee80211_channel *chan;
1254         int i;
1255         const struct ieee80211_txrx_stypes *mgmt_stypes =
1256                                 rdev->wiphy.mgmt_stypes;
1257         u32 features;
1258
1259         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1260         if (!hdr)
1261                 return -ENOBUFS;
1262
1263         if (WARN_ON(!state))
1264                 return -EINVAL;
1265
1266         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1267             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1268                            wiphy_name(&rdev->wiphy)) ||
1269             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1270                         cfg80211_rdev_list_generation))
1271                 goto nla_put_failure;
1272
1273         if (cmd != NL80211_CMD_NEW_WIPHY)
1274                 goto finish;
1275
1276         switch (state->split_start) {
1277         case 0:
1278                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1279                                rdev->wiphy.retry_short) ||
1280                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1281                                rdev->wiphy.retry_long) ||
1282                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1283                                 rdev->wiphy.frag_threshold) ||
1284                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1285                                 rdev->wiphy.rts_threshold) ||
1286                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1287                                rdev->wiphy.coverage_class) ||
1288                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1289                                rdev->wiphy.max_scan_ssids) ||
1290                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1291                                rdev->wiphy.max_sched_scan_ssids) ||
1292                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1293                                 rdev->wiphy.max_scan_ie_len) ||
1294                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1295                                 rdev->wiphy.max_sched_scan_ie_len) ||
1296                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1297                                rdev->wiphy.max_match_sets) ||
1298                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1299                                 rdev->wiphy.max_sched_scan_plans) ||
1300                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1301                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1302                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1303                                 rdev->wiphy.max_sched_scan_plan_iterations))
1304                         goto nla_put_failure;
1305
1306                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1307                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1308                         goto nla_put_failure;
1309                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1310                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1311                         goto nla_put_failure;
1312                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1313                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1314                         goto nla_put_failure;
1315                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1316                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1317                         goto nla_put_failure;
1318                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1319                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1320                         goto nla_put_failure;
1321                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1322                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1323                         goto nla_put_failure;
1324                 state->split_start++;
1325                 if (state->split)
1326                         break;
1327         case 1:
1328                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1329                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1330                             rdev->wiphy.cipher_suites))
1331                         goto nla_put_failure;
1332
1333                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1334                                rdev->wiphy.max_num_pmkids))
1335                         goto nla_put_failure;
1336
1337                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1338                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1339                         goto nla_put_failure;
1340
1341                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1342                                 rdev->wiphy.available_antennas_tx) ||
1343                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1344                                 rdev->wiphy.available_antennas_rx))
1345                         goto nla_put_failure;
1346
1347                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1348                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1349                                 rdev->wiphy.probe_resp_offload))
1350                         goto nla_put_failure;
1351
1352                 if ((rdev->wiphy.available_antennas_tx ||
1353                      rdev->wiphy.available_antennas_rx) &&
1354                     rdev->ops->get_antenna) {
1355                         u32 tx_ant = 0, rx_ant = 0;
1356                         int res;
1357                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1358                         if (!res) {
1359                                 if (nla_put_u32(msg,
1360                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1361                                                 tx_ant) ||
1362                                     nla_put_u32(msg,
1363                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1364                                                 rx_ant))
1365                                         goto nla_put_failure;
1366                         }
1367                 }
1368
1369                 state->split_start++;
1370                 if (state->split)
1371                         break;
1372         case 2:
1373                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1374                                         rdev->wiphy.interface_modes))
1375                                 goto nla_put_failure;
1376                 state->split_start++;
1377                 if (state->split)
1378                         break;
1379         case 3:
1380                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1381                 if (!nl_bands)
1382                         goto nla_put_failure;
1383
1384                 for (band = state->band_start;
1385                      band < IEEE80211_NUM_BANDS; band++) {
1386                         struct ieee80211_supported_band *sband;
1387
1388                         sband = rdev->wiphy.bands[band];
1389
1390                         if (!sband)
1391                                 continue;
1392
1393                         nl_band = nla_nest_start(msg, band);
1394                         if (!nl_band)
1395                                 goto nla_put_failure;
1396
1397                         switch (state->chan_start) {
1398                         case 0:
1399                                 if (nl80211_send_band_rateinfo(msg, sband))
1400                                         goto nla_put_failure;
1401                                 state->chan_start++;
1402                                 if (state->split)
1403                                         break;
1404                         default:
1405                                 /* add frequencies */
1406                                 nl_freqs = nla_nest_start(
1407                                         msg, NL80211_BAND_ATTR_FREQS);
1408                                 if (!nl_freqs)
1409                                         goto nla_put_failure;
1410
1411                                 for (i = state->chan_start - 1;
1412                                      i < sband->n_channels;
1413                                      i++) {
1414                                         nl_freq = nla_nest_start(msg, i);
1415                                         if (!nl_freq)
1416                                                 goto nla_put_failure;
1417
1418                                         chan = &sband->channels[i];
1419
1420                                         if (nl80211_msg_put_channel(
1421                                                         msg, chan,
1422                                                         state->split))
1423                                                 goto nla_put_failure;
1424
1425                                         nla_nest_end(msg, nl_freq);
1426                                         if (state->split)
1427                                                 break;
1428                                 }
1429                                 if (i < sband->n_channels)
1430                                         state->chan_start = i + 2;
1431                                 else
1432                                         state->chan_start = 0;
1433                                 nla_nest_end(msg, nl_freqs);
1434                         }
1435
1436                         nla_nest_end(msg, nl_band);
1437
1438                         if (state->split) {
1439                                 /* start again here */
1440                                 if (state->chan_start)
1441                                         band--;
1442                                 break;
1443                         }
1444                 }
1445                 nla_nest_end(msg, nl_bands);
1446
1447                 if (band < IEEE80211_NUM_BANDS)
1448                         state->band_start = band + 1;
1449                 else
1450                         state->band_start = 0;
1451
1452                 /* if bands & channels are done, continue outside */
1453                 if (state->band_start == 0 && state->chan_start == 0)
1454                         state->split_start++;
1455                 if (state->split)
1456                         break;
1457         case 4:
1458                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1459                 if (!nl_cmds)
1460                         goto nla_put_failure;
1461
1462                 i = 0;
1463 #define CMD(op, n)                                                      \
1464                  do {                                                   \
1465                         if (rdev->ops->op) {                            \
1466                                 i++;                                    \
1467                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1468                                         goto nla_put_failure;           \
1469                         }                                               \
1470                 } while (0)
1471
1472                 CMD(add_virtual_intf, NEW_INTERFACE);
1473                 CMD(change_virtual_intf, SET_INTERFACE);
1474                 CMD(add_key, NEW_KEY);
1475                 CMD(start_ap, START_AP);
1476                 CMD(add_station, NEW_STATION);
1477                 CMD(add_mpath, NEW_MPATH);
1478                 CMD(update_mesh_config, SET_MESH_CONFIG);
1479                 CMD(change_bss, SET_BSS);
1480                 CMD(auth, AUTHENTICATE);
1481                 CMD(assoc, ASSOCIATE);
1482                 CMD(deauth, DEAUTHENTICATE);
1483                 CMD(disassoc, DISASSOCIATE);
1484                 CMD(join_ibss, JOIN_IBSS);
1485                 CMD(join_mesh, JOIN_MESH);
1486                 CMD(set_pmksa, SET_PMKSA);
1487                 CMD(del_pmksa, DEL_PMKSA);
1488                 CMD(flush_pmksa, FLUSH_PMKSA);
1489                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1490                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1491                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1492                 CMD(mgmt_tx, FRAME);
1493                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1494                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1495                         i++;
1496                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1497                                 goto nla_put_failure;
1498                 }
1499                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1500                     rdev->ops->join_mesh) {
1501                         i++;
1502                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1503                                 goto nla_put_failure;
1504                 }
1505                 CMD(set_wds_peer, SET_WDS_PEER);
1506                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1507                         CMD(tdls_mgmt, TDLS_MGMT);
1508                         CMD(tdls_oper, TDLS_OPER);
1509                 }
1510                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1511                         CMD(sched_scan_start, START_SCHED_SCAN);
1512                 CMD(probe_client, PROBE_CLIENT);
1513                 CMD(set_noack_map, SET_NOACK_MAP);
1514                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1515                         i++;
1516                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1517                                 goto nla_put_failure;
1518                 }
1519                 CMD(start_p2p_device, START_P2P_DEVICE);
1520                 CMD(set_mcast_rate, SET_MCAST_RATE);
1521 #ifdef CONFIG_NL80211_TESTMODE
1522                 CMD(testmode_cmd, TESTMODE);
1523 #endif
1524                 if (state->split) {
1525                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1526                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1527                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1528                                 CMD(channel_switch, CHANNEL_SWITCH);
1529                         CMD(set_qos_map, SET_QOS_MAP);
1530                         if (rdev->wiphy.features &
1531                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1532                                 CMD(add_tx_ts, ADD_TX_TS);
1533                 }
1534                 /* add into the if now */
1535 #undef CMD
1536
1537                 if (rdev->ops->connect || rdev->ops->auth) {
1538                         i++;
1539                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1540                                 goto nla_put_failure;
1541                 }
1542
1543                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1544                         i++;
1545                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1546                                 goto nla_put_failure;
1547                 }
1548
1549                 nla_nest_end(msg, nl_cmds);
1550                 state->split_start++;
1551                 if (state->split)
1552                         break;
1553         case 5:
1554                 if (rdev->ops->remain_on_channel &&
1555                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1556                     nla_put_u32(msg,
1557                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1558                                 rdev->wiphy.max_remain_on_channel_duration))
1559                         goto nla_put_failure;
1560
1561                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1562                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1563                         goto nla_put_failure;
1564
1565                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1566                         goto nla_put_failure;
1567                 state->split_start++;
1568                 if (state->split)
1569                         break;
1570         case 6:
1571 #ifdef CONFIG_PM
1572                 if (nl80211_send_wowlan(msg, rdev, state->split))
1573                         goto nla_put_failure;
1574                 state->split_start++;
1575                 if (state->split)
1576                         break;
1577 #else
1578                 state->split_start++;
1579 #endif
1580         case 7:
1581                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1582                                         rdev->wiphy.software_iftypes))
1583                         goto nla_put_failure;
1584
1585                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1586                                                    state->split))
1587                         goto nla_put_failure;
1588
1589                 state->split_start++;
1590                 if (state->split)
1591                         break;
1592         case 8:
1593                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1594                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1595                                 rdev->wiphy.ap_sme_capa))
1596                         goto nla_put_failure;
1597
1598                 features = rdev->wiphy.features;
1599                 /*
1600                  * We can only add the per-channel limit information if the
1601                  * dump is split, otherwise it makes it too big. Therefore
1602                  * only advertise it in that case.
1603                  */
1604                 if (state->split)
1605                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1606                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1607                         goto nla_put_failure;
1608
1609                 if (rdev->wiphy.ht_capa_mod_mask &&
1610                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1611                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1612                             rdev->wiphy.ht_capa_mod_mask))
1613                         goto nla_put_failure;
1614
1615                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1616                     rdev->wiphy.max_acl_mac_addrs &&
1617                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1618                                 rdev->wiphy.max_acl_mac_addrs))
1619                         goto nla_put_failure;
1620
1621                 /*
1622                  * Any information below this point is only available to
1623                  * applications that can deal with it being split. This
1624                  * helps ensure that newly added capabilities don't break
1625                  * older tools by overrunning their buffers.
1626                  *
1627                  * We still increment split_start so that in the split
1628                  * case we'll continue with more data in the next round,
1629                  * but break unconditionally so unsplit data stops here.
1630                  */
1631                 state->split_start++;
1632                 break;
1633         case 9:
1634                 if (rdev->wiphy.extended_capabilities &&
1635                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1636                              rdev->wiphy.extended_capabilities_len,
1637                              rdev->wiphy.extended_capabilities) ||
1638                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1639                              rdev->wiphy.extended_capabilities_len,
1640                              rdev->wiphy.extended_capabilities_mask)))
1641                         goto nla_put_failure;
1642
1643                 if (rdev->wiphy.vht_capa_mod_mask &&
1644                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1645                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1646                             rdev->wiphy.vht_capa_mod_mask))
1647                         goto nla_put_failure;
1648
1649                 state->split_start++;
1650                 break;
1651         case 10:
1652                 if (nl80211_send_coalesce(msg, rdev))
1653                         goto nla_put_failure;
1654
1655                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1656                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1657                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1658                         goto nla_put_failure;
1659
1660                 if (rdev->wiphy.max_ap_assoc_sta &&
1661                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1662                                 rdev->wiphy.max_ap_assoc_sta))
1663                         goto nla_put_failure;
1664
1665                 state->split_start++;
1666                 break;
1667         case 11:
1668                 if (rdev->wiphy.n_vendor_commands) {
1669                         const struct nl80211_vendor_cmd_info *info;
1670                         struct nlattr *nested;
1671
1672                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1673                         if (!nested)
1674                                 goto nla_put_failure;
1675
1676                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1677                                 info = &rdev->wiphy.vendor_commands[i].info;
1678                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1679                                         goto nla_put_failure;
1680                         }
1681                         nla_nest_end(msg, nested);
1682                 }
1683
1684                 if (rdev->wiphy.n_vendor_events) {
1685                         const struct nl80211_vendor_cmd_info *info;
1686                         struct nlattr *nested;
1687
1688                         nested = nla_nest_start(msg,
1689                                                 NL80211_ATTR_VENDOR_EVENTS);
1690                         if (!nested)
1691                                 goto nla_put_failure;
1692
1693                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1694                                 info = &rdev->wiphy.vendor_events[i];
1695                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1696                                         goto nla_put_failure;
1697                         }
1698                         nla_nest_end(msg, nested);
1699                 }
1700                 state->split_start++;
1701                 break;
1702         case 12:
1703                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1704                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1705                                rdev->wiphy.max_num_csa_counters))
1706                         goto nla_put_failure;
1707
1708                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1709                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1710                         goto nla_put_failure;
1711
1712                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1713                             sizeof(rdev->wiphy.ext_features),
1714                             rdev->wiphy.ext_features))
1715                         goto nla_put_failure;
1716
1717                 /* done */
1718                 state->split_start = 0;
1719                 break;
1720         }
1721  finish:
1722         genlmsg_end(msg, hdr);
1723         return 0;
1724
1725  nla_put_failure:
1726         genlmsg_cancel(msg, hdr);
1727         return -EMSGSIZE;
1728 }
1729
1730 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1731                                     struct netlink_callback *cb,
1732                                     struct nl80211_dump_wiphy_state *state)
1733 {
1734         struct nlattr **tb = nl80211_fam.attrbuf;
1735         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1736                               tb, nl80211_fam.maxattr, nl80211_policy);
1737         /* ignore parse errors for backward compatibility */
1738         if (ret)
1739                 return 0;
1740
1741         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1742         if (tb[NL80211_ATTR_WIPHY])
1743                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1744         if (tb[NL80211_ATTR_WDEV])
1745                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1746         if (tb[NL80211_ATTR_IFINDEX]) {
1747                 struct net_device *netdev;
1748                 struct cfg80211_registered_device *rdev;
1749                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1750
1751                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1752                 if (!netdev)
1753                         return -ENODEV;
1754                 if (netdev->ieee80211_ptr) {
1755                         rdev = wiphy_to_rdev(
1756                                 netdev->ieee80211_ptr->wiphy);
1757                         state->filter_wiphy = rdev->wiphy_idx;
1758                 }
1759         }
1760
1761         return 0;
1762 }
1763
1764 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1765 {
1766         int idx = 0, ret;
1767         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1768         struct cfg80211_registered_device *rdev;
1769
1770         rtnl_lock();
1771         if (!state) {
1772                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1773                 if (!state) {
1774                         rtnl_unlock();
1775                         return -ENOMEM;
1776                 }
1777                 state->filter_wiphy = -1;
1778                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1779                 if (ret) {
1780                         kfree(state);
1781                         rtnl_unlock();
1782                         return ret;
1783                 }
1784                 cb->args[0] = (long)state;
1785         }
1786
1787         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1788                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1789                         continue;
1790                 if (++idx <= state->start)
1791                         continue;
1792                 if (state->filter_wiphy != -1 &&
1793                     state->filter_wiphy != rdev->wiphy_idx)
1794                         continue;
1795                 /* attempt to fit multiple wiphy data chunks into the skb */
1796                 do {
1797                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1798                                                  skb,
1799                                                  NETLINK_CB(cb->skb).portid,
1800                                                  cb->nlh->nlmsg_seq,
1801                                                  NLM_F_MULTI, state);
1802                         if (ret < 0) {
1803                                 /*
1804                                  * If sending the wiphy data didn't fit (ENOBUFS
1805                                  * or EMSGSIZE returned), this SKB is still
1806                                  * empty (so it's not too big because another
1807                                  * wiphy dataset is already in the skb) and
1808                                  * we've not tried to adjust the dump allocation
1809                                  * yet ... then adjust the alloc size to be
1810                                  * bigger, and return 1 but with the empty skb.
1811                                  * This results in an empty message being RX'ed
1812                                  * in userspace, but that is ignored.
1813                                  *
1814                                  * We can then retry with the larger buffer.
1815                                  */
1816                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1817                                     !skb->len && !state->split &&
1818                                     cb->min_dump_alloc < 4096) {
1819                                         cb->min_dump_alloc = 4096;
1820                                         state->split_start = 0;
1821                                         rtnl_unlock();
1822                                         return 1;
1823                                 }
1824                                 idx--;
1825                                 break;
1826                         }
1827                 } while (state->split_start > 0);
1828                 break;
1829         }
1830         rtnl_unlock();
1831
1832         state->start = idx;
1833
1834         return skb->len;
1835 }
1836
1837 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1838 {
1839         kfree((void *)cb->args[0]);
1840         return 0;
1841 }
1842
1843 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1844 {
1845         struct sk_buff *msg;
1846         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1847         struct nl80211_dump_wiphy_state state = {};
1848
1849         msg = nlmsg_new(4096, GFP_KERNEL);
1850         if (!msg)
1851                 return -ENOMEM;
1852
1853         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1854                                info->snd_portid, info->snd_seq, 0,
1855                                &state) < 0) {
1856                 nlmsg_free(msg);
1857                 return -ENOBUFS;
1858         }
1859
1860         return genlmsg_reply(msg, info);
1861 }
1862
1863 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1864         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1865         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1866         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1867         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1868         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1869 };
1870
1871 static int parse_txq_params(struct nlattr *tb[],
1872                             struct ieee80211_txq_params *txq_params)
1873 {
1874         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1875             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1876             !tb[NL80211_TXQ_ATTR_AIFS])
1877                 return -EINVAL;
1878
1879         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1880         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1881         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1882         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1883         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1884
1885         if (txq_params->ac >= NL80211_NUM_ACS)
1886                 return -EINVAL;
1887
1888         return 0;
1889 }
1890
1891 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1892 {
1893         /*
1894          * You can only set the channel explicitly for WDS interfaces,
1895          * all others have their channel managed via their respective
1896          * "establish a connection" command (connect, join, ...)
1897          *
1898          * For AP/GO and mesh mode, the channel can be set with the
1899          * channel userspace API, but is only stored and passed to the
1900          * low-level driver when the AP starts or the mesh is joined.
1901          * This is for backward compatibility, userspace can also give
1902          * the channel in the start-ap or join-mesh commands instead.
1903          *
1904          * Monitors are special as they are normally slaved to
1905          * whatever else is going on, so they have their own special
1906          * operation to set the monitor channel if possible.
1907          */
1908         return !wdev ||
1909                 wdev->iftype == NL80211_IFTYPE_AP ||
1910                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1911                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1912                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1913 }
1914
1915 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1916                                  struct genl_info *info,
1917                                  struct cfg80211_chan_def *chandef)
1918 {
1919         u32 control_freq;
1920
1921         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1922                 return -EINVAL;
1923
1924         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1925
1926         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1927         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1928         chandef->center_freq1 = control_freq;
1929         chandef->center_freq2 = 0;
1930
1931         /* Primary channel not allowed */
1932         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1933                 return -EINVAL;
1934
1935         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1936                 enum nl80211_channel_type chantype;
1937
1938                 chantype = nla_get_u32(
1939                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1940
1941                 switch (chantype) {
1942                 case NL80211_CHAN_NO_HT:
1943                 case NL80211_CHAN_HT20:
1944                 case NL80211_CHAN_HT40PLUS:
1945                 case NL80211_CHAN_HT40MINUS:
1946                         cfg80211_chandef_create(chandef, chandef->chan,
1947                                                 chantype);
1948                         break;
1949                 default:
1950                         return -EINVAL;
1951                 }
1952         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1953                 chandef->width =
1954                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1955                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1956                         chandef->center_freq1 =
1957                                 nla_get_u32(
1958                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1959                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1960                         chandef->center_freq2 =
1961                                 nla_get_u32(
1962                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1963         }
1964
1965         if (!cfg80211_chandef_valid(chandef))
1966                 return -EINVAL;
1967
1968         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1969                                      IEEE80211_CHAN_DISABLED))
1970                 return -EINVAL;
1971
1972         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1973              chandef->width == NL80211_CHAN_WIDTH_10) &&
1974             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1975                 return -EINVAL;
1976
1977         return 0;
1978 }
1979
1980 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1981                                  struct net_device *dev,
1982                                  struct genl_info *info)
1983 {
1984         struct cfg80211_chan_def chandef;
1985         int result;
1986         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1987         struct wireless_dev *wdev = NULL;
1988
1989         if (dev)
1990                 wdev = dev->ieee80211_ptr;
1991         if (!nl80211_can_set_dev_channel(wdev))
1992                 return -EOPNOTSUPP;
1993         if (wdev)
1994                 iftype = wdev->iftype;
1995
1996         result = nl80211_parse_chandef(rdev, info, &chandef);
1997         if (result)
1998                 return result;
1999
2000         switch (iftype) {
2001         case NL80211_IFTYPE_AP:
2002         case NL80211_IFTYPE_P2P_GO:
2003                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2004                                                    iftype)) {
2005                         result = -EINVAL;
2006                         break;
2007                 }
2008                 if (wdev->beacon_interval) {
2009                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2010                             !(rdev->wiphy.features &
2011                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2012                                 result = -EBUSY;
2013                                 break;
2014                         }
2015
2016                         /* Only allow dynamic channel width changes */
2017                         if (chandef.chan != wdev->preset_chandef.chan) {
2018                                 result = -EBUSY;
2019                                 break;
2020                         }
2021                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2022                         if (result)
2023                                 break;
2024                 }
2025                 wdev->preset_chandef = chandef;
2026                 result = 0;
2027                 break;
2028         case NL80211_IFTYPE_MESH_POINT:
2029                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2030                 break;
2031         case NL80211_IFTYPE_MONITOR:
2032                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2033                 break;
2034         default:
2035                 result = -EINVAL;
2036         }
2037
2038         return result;
2039 }
2040
2041 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2042 {
2043         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2044         struct net_device *netdev = info->user_ptr[1];
2045
2046         return __nl80211_set_channel(rdev, netdev, info);
2047 }
2048
2049 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2050 {
2051         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2052         struct net_device *dev = info->user_ptr[1];
2053         struct wireless_dev *wdev = dev->ieee80211_ptr;
2054         const u8 *bssid;
2055
2056         if (!info->attrs[NL80211_ATTR_MAC])
2057                 return -EINVAL;
2058
2059         if (netif_running(dev))
2060                 return -EBUSY;
2061
2062         if (!rdev->ops->set_wds_peer)
2063                 return -EOPNOTSUPP;
2064
2065         if (wdev->iftype != NL80211_IFTYPE_WDS)
2066                 return -EOPNOTSUPP;
2067
2068         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2069         return rdev_set_wds_peer(rdev, dev, bssid);
2070 }
2071
2072
2073 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2074 {
2075         struct cfg80211_registered_device *rdev;
2076         struct net_device *netdev = NULL;
2077         struct wireless_dev *wdev;
2078         int result = 0, rem_txq_params = 0;
2079         struct nlattr *nl_txq_params;
2080         u32 changed;
2081         u8 retry_short = 0, retry_long = 0;
2082         u32 frag_threshold = 0, rts_threshold = 0;
2083         u8 coverage_class = 0;
2084
2085         ASSERT_RTNL();
2086
2087         /*
2088          * Try to find the wiphy and netdev. Normally this
2089          * function shouldn't need the netdev, but this is
2090          * done for backward compatibility -- previously
2091          * setting the channel was done per wiphy, but now
2092          * it is per netdev. Previous userland like hostapd
2093          * also passed a netdev to set_wiphy, so that it is
2094          * possible to let that go to the right netdev!
2095          */
2096
2097         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2098                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2099
2100                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2101                 if (netdev && netdev->ieee80211_ptr)
2102                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2103                 else
2104                         netdev = NULL;
2105         }
2106
2107         if (!netdev) {
2108                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2109                                                   info->attrs);
2110                 if (IS_ERR(rdev))
2111                         return PTR_ERR(rdev);
2112                 wdev = NULL;
2113                 netdev = NULL;
2114                 result = 0;
2115         } else
2116                 wdev = netdev->ieee80211_ptr;
2117
2118         /*
2119          * end workaround code, by now the rdev is available
2120          * and locked, and wdev may or may not be NULL.
2121          */
2122
2123         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2124                 result = cfg80211_dev_rename(
2125                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2126
2127         if (result)
2128                 return result;
2129
2130         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2131                 struct ieee80211_txq_params txq_params;
2132                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2133
2134                 if (!rdev->ops->set_txq_params)
2135                         return -EOPNOTSUPP;
2136
2137                 if (!netdev)
2138                         return -EINVAL;
2139
2140                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2141                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2142                         return -EINVAL;
2143
2144                 if (!netif_running(netdev))
2145                         return -ENETDOWN;
2146
2147                 nla_for_each_nested(nl_txq_params,
2148                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2149                                     rem_txq_params) {
2150                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2151                                            nla_data(nl_txq_params),
2152                                            nla_len(nl_txq_params),
2153                                            txq_params_policy);
2154                         if (result)
2155                                 return result;
2156                         result = parse_txq_params(tb, &txq_params);
2157                         if (result)
2158                                 return result;
2159
2160                         result = rdev_set_txq_params(rdev, netdev,
2161                                                      &txq_params);
2162                         if (result)
2163                                 return result;
2164                 }
2165         }
2166
2167         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2168                 result = __nl80211_set_channel(
2169                         rdev,
2170                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2171                         info);
2172                 if (result)
2173                         return result;
2174         }
2175
2176         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2177                 struct wireless_dev *txp_wdev = wdev;
2178                 enum nl80211_tx_power_setting type;
2179                 int idx, mbm = 0;
2180
2181                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2182                         txp_wdev = NULL;
2183
2184                 if (!rdev->ops->set_tx_power)
2185                         return -EOPNOTSUPP;
2186
2187                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2188                 type = nla_get_u32(info->attrs[idx]);
2189
2190                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2191                     (type != NL80211_TX_POWER_AUTOMATIC))
2192                         return -EINVAL;
2193
2194                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2195                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2196                         mbm = nla_get_u32(info->attrs[idx]);
2197                 }
2198
2199                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2200                 if (result)
2201                         return result;
2202         }
2203
2204         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2205             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2206                 u32 tx_ant, rx_ant;
2207                 if ((!rdev->wiphy.available_antennas_tx &&
2208                      !rdev->wiphy.available_antennas_rx) ||
2209                     !rdev->ops->set_antenna)
2210                         return -EOPNOTSUPP;
2211
2212                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2213                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2214
2215                 /* reject antenna configurations which don't match the
2216                  * available antenna masks, except for the "all" mask */
2217                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2218                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2219                         return -EINVAL;
2220
2221                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2222                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2223
2224                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2225                 if (result)
2226                         return result;
2227         }
2228
2229         changed = 0;
2230
2231         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2232                 retry_short = nla_get_u8(
2233                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2234                 if (retry_short == 0)
2235                         return -EINVAL;
2236
2237                 changed |= WIPHY_PARAM_RETRY_SHORT;
2238         }
2239
2240         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2241                 retry_long = nla_get_u8(
2242                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2243                 if (retry_long == 0)
2244                         return -EINVAL;
2245
2246                 changed |= WIPHY_PARAM_RETRY_LONG;
2247         }
2248
2249         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2250                 frag_threshold = nla_get_u32(
2251                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2252                 if (frag_threshold < 256)
2253                         return -EINVAL;
2254
2255                 if (frag_threshold != (u32) -1) {
2256                         /*
2257                          * Fragments (apart from the last one) are required to
2258                          * have even length. Make the fragmentation code
2259                          * simpler by stripping LSB should someone try to use
2260                          * odd threshold value.
2261                          */
2262                         frag_threshold &= ~0x1;
2263                 }
2264                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2265         }
2266
2267         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2268                 rts_threshold = nla_get_u32(
2269                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2270                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2271         }
2272
2273         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2274                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2275                         return -EINVAL;
2276
2277                 coverage_class = nla_get_u8(
2278                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2279                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2280         }
2281
2282         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2283                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2284                         return -EOPNOTSUPP;
2285
2286                 changed |= WIPHY_PARAM_DYN_ACK;
2287         }
2288
2289         if (changed) {
2290                 u8 old_retry_short, old_retry_long;
2291                 u32 old_frag_threshold, old_rts_threshold;
2292                 u8 old_coverage_class;
2293
2294                 if (!rdev->ops->set_wiphy_params)
2295                         return -EOPNOTSUPP;
2296
2297                 old_retry_short = rdev->wiphy.retry_short;
2298                 old_retry_long = rdev->wiphy.retry_long;
2299                 old_frag_threshold = rdev->wiphy.frag_threshold;
2300                 old_rts_threshold = rdev->wiphy.rts_threshold;
2301                 old_coverage_class = rdev->wiphy.coverage_class;
2302
2303                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2304                         rdev->wiphy.retry_short = retry_short;
2305                 if (changed & WIPHY_PARAM_RETRY_LONG)
2306                         rdev->wiphy.retry_long = retry_long;
2307                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2308                         rdev->wiphy.frag_threshold = frag_threshold;
2309                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2310                         rdev->wiphy.rts_threshold = rts_threshold;
2311                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2312                         rdev->wiphy.coverage_class = coverage_class;
2313
2314                 result = rdev_set_wiphy_params(rdev, changed);
2315                 if (result) {
2316                         rdev->wiphy.retry_short = old_retry_short;
2317                         rdev->wiphy.retry_long = old_retry_long;
2318                         rdev->wiphy.frag_threshold = old_frag_threshold;
2319                         rdev->wiphy.rts_threshold = old_rts_threshold;
2320                         rdev->wiphy.coverage_class = old_coverage_class;
2321                         return result;
2322                 }
2323         }
2324         return 0;
2325 }
2326
2327 static inline u64 wdev_id(struct wireless_dev *wdev)
2328 {
2329         return (u64)wdev->identifier |
2330                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2331 }
2332
2333 static int nl80211_send_chandef(struct sk_buff *msg,
2334                                 const struct cfg80211_chan_def *chandef)
2335 {
2336         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2337                 return -EINVAL;
2338
2339         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2340                         chandef->chan->center_freq))
2341                 return -ENOBUFS;
2342         switch (chandef->width) {
2343         case NL80211_CHAN_WIDTH_20_NOHT:
2344         case NL80211_CHAN_WIDTH_20:
2345         case NL80211_CHAN_WIDTH_40:
2346                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2347                                 cfg80211_get_chandef_type(chandef)))
2348                         return -ENOBUFS;
2349                 break;
2350         default:
2351                 break;
2352         }
2353         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2354                 return -ENOBUFS;
2355         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2356                 return -ENOBUFS;
2357         if (chandef->center_freq2 &&
2358             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2359                 return -ENOBUFS;
2360         return 0;
2361 }
2362
2363 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2364                               struct cfg80211_registered_device *rdev,
2365                               struct wireless_dev *wdev, bool removal)
2366 {
2367         struct net_device *dev = wdev->netdev;
2368         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2369         void *hdr;
2370
2371         if (removal)
2372                 cmd = NL80211_CMD_DEL_INTERFACE;
2373
2374         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2375         if (!hdr)
2376                 return -1;
2377
2378         if (dev &&
2379             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2380              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2381                 goto nla_put_failure;
2382
2383         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2384             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2385             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2386             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2387             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2388                         rdev->devlist_generation ^
2389                         (cfg80211_rdev_list_generation << 2)))
2390                 goto nla_put_failure;
2391
2392         if (rdev->ops->get_channel) {
2393                 int ret;
2394                 struct cfg80211_chan_def chandef;
2395
2396                 ret = rdev_get_channel(rdev, wdev, &chandef);
2397                 if (ret == 0) {
2398                         if (nl80211_send_chandef(msg, &chandef))
2399                                 goto nla_put_failure;
2400                 }
2401         }
2402
2403         if (rdev->ops->get_tx_power) {
2404                 int dbm, ret;
2405
2406                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2407                 if (ret == 0 &&
2408                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2409                                 DBM_TO_MBM(dbm)))
2410                         goto nla_put_failure;
2411         }
2412
2413         if (wdev->ssid_len) {
2414                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2415                         goto nla_put_failure;
2416         }
2417
2418         genlmsg_end(msg, hdr);
2419         return 0;
2420
2421  nla_put_failure:
2422         genlmsg_cancel(msg, hdr);
2423         return -EMSGSIZE;
2424 }
2425
2426 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2427 {
2428         int wp_idx = 0;
2429         int if_idx = 0;
2430         int wp_start = cb->args[0];
2431         int if_start = cb->args[1];
2432         struct cfg80211_registered_device *rdev;
2433         struct wireless_dev *wdev;
2434
2435         rtnl_lock();
2436         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2437                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2438                         continue;
2439                 if (wp_idx < wp_start) {
2440                         wp_idx++;
2441                         continue;
2442                 }
2443                 if_idx = 0;
2444
2445                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2446                         if (if_idx < if_start) {
2447                                 if_idx++;
2448                                 continue;
2449                         }
2450                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2451                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2452                                                rdev, wdev, false) < 0) {
2453                                 goto out;
2454                         }
2455                         if_idx++;
2456                 }
2457
2458                 wp_idx++;
2459         }
2460  out:
2461         rtnl_unlock();
2462
2463         cb->args[0] = wp_idx;
2464         cb->args[1] = if_idx;
2465
2466         return skb->len;
2467 }
2468
2469 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2470 {
2471         struct sk_buff *msg;
2472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2473         struct wireless_dev *wdev = info->user_ptr[1];
2474
2475         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2476         if (!msg)
2477                 return -ENOMEM;
2478
2479         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2480                                rdev, wdev, false) < 0) {
2481                 nlmsg_free(msg);
2482                 return -ENOBUFS;
2483         }
2484
2485         return genlmsg_reply(msg, info);
2486 }
2487
2488 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2489         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2490         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2491         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2492         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2493         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2494         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2495 };
2496
2497 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2498 {
2499         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2500         int flag;
2501
2502         *mntrflags = 0;
2503
2504         if (!nla)
2505                 return -EINVAL;
2506
2507         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2508                              nla, mntr_flags_policy))
2509                 return -EINVAL;
2510
2511         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2512                 if (flags[flag])
2513                         *mntrflags |= (1<<flag);
2514
2515         return 0;
2516 }
2517
2518 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2519                                struct net_device *netdev, u8 use_4addr,
2520                                enum nl80211_iftype iftype)
2521 {
2522         if (!use_4addr) {
2523                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2524                         return -EBUSY;
2525                 return 0;
2526         }
2527
2528         switch (iftype) {
2529         case NL80211_IFTYPE_AP_VLAN:
2530                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2531                         return 0;
2532                 break;
2533         case NL80211_IFTYPE_STATION:
2534                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2535                         return 0;
2536                 break;
2537         default:
2538                 break;
2539         }
2540
2541         return -EOPNOTSUPP;
2542 }
2543
2544 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2545 {
2546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2547         struct vif_params params;
2548         int err;
2549         enum nl80211_iftype otype, ntype;
2550         struct net_device *dev = info->user_ptr[1];
2551         u32 _flags, *flags = NULL;
2552         bool change = false;
2553
2554         memset(&params, 0, sizeof(params));
2555
2556         otype = ntype = dev->ieee80211_ptr->iftype;
2557
2558         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2559                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2560                 if (otype != ntype)
2561                         change = true;
2562                 if (ntype > NL80211_IFTYPE_MAX)
2563                         return -EINVAL;
2564         }
2565
2566         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2567                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2568
2569                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2570                         return -EINVAL;
2571                 if (netif_running(dev))
2572                         return -EBUSY;
2573
2574                 wdev_lock(wdev);
2575                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2576                              IEEE80211_MAX_MESH_ID_LEN);
2577                 wdev->mesh_id_up_len =
2578                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2579                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2580                        wdev->mesh_id_up_len);
2581                 wdev_unlock(wdev);
2582         }
2583
2584         if (info->attrs[NL80211_ATTR_4ADDR]) {
2585                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2586                 change = true;
2587                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2588                 if (err)
2589                         return err;
2590         } else {
2591                 params.use_4addr = -1;
2592         }
2593
2594         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2595                 if (ntype != NL80211_IFTYPE_MONITOR)
2596                         return -EINVAL;
2597                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2598                                           &_flags);
2599                 if (err)
2600                         return err;
2601
2602                 flags = &_flags;
2603                 change = true;
2604         }
2605
2606         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2607             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2608                 return -EOPNOTSUPP;
2609
2610         if (change)
2611                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2612         else
2613                 err = 0;
2614
2615         if (!err && params.use_4addr != -1)
2616                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2617
2618         return err;
2619 }
2620
2621 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2622 {
2623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2624         struct vif_params params;
2625         struct wireless_dev *wdev;
2626         struct sk_buff *msg, *event;
2627         int err;
2628         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2629         u32 flags;
2630
2631         /* to avoid failing a new interface creation due to pending removal */
2632         cfg80211_destroy_ifaces(rdev);
2633
2634         memset(&params, 0, sizeof(params));
2635
2636         if (!info->attrs[NL80211_ATTR_IFNAME])
2637                 return -EINVAL;
2638
2639         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2640                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2641                 if (type > NL80211_IFTYPE_MAX)
2642                         return -EINVAL;
2643         }
2644
2645         if (!rdev->ops->add_virtual_intf ||
2646             !(rdev->wiphy.interface_modes & (1 << type)))
2647                 return -EOPNOTSUPP;
2648
2649         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2650              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2651             info->attrs[NL80211_ATTR_MAC]) {
2652                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2653                            ETH_ALEN);
2654                 if (!is_valid_ether_addr(params.macaddr))
2655                         return -EADDRNOTAVAIL;
2656         }
2657
2658         if (info->attrs[NL80211_ATTR_4ADDR]) {
2659                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2660                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2661                 if (err)
2662                         return err;
2663         }
2664
2665         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2666                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2667                                   &flags);
2668
2669         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2670             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2671                 return -EOPNOTSUPP;
2672
2673         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2674         if (!msg)
2675                 return -ENOMEM;
2676
2677         wdev = rdev_add_virtual_intf(rdev,
2678                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2679                                 NET_NAME_USER, type, err ? NULL : &flags,
2680                                 &params);
2681         if (WARN_ON(!wdev)) {
2682                 nlmsg_free(msg);
2683                 return -EPROTO;
2684         } else if (IS_ERR(wdev)) {
2685                 nlmsg_free(msg);
2686                 return PTR_ERR(wdev);
2687         }
2688
2689         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2690                 wdev->owner_nlportid = info->snd_portid;
2691
2692         switch (type) {
2693         case NL80211_IFTYPE_MESH_POINT:
2694                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2695                         break;
2696                 wdev_lock(wdev);
2697                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2698                              IEEE80211_MAX_MESH_ID_LEN);
2699                 wdev->mesh_id_up_len =
2700                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2701                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2702                        wdev->mesh_id_up_len);
2703                 wdev_unlock(wdev);
2704                 break;
2705         case NL80211_IFTYPE_P2P_DEVICE:
2706                 /*
2707                  * P2P Device doesn't have a netdev, so doesn't go
2708                  * through the netdev notifier and must be added here
2709                  */
2710                 mutex_init(&wdev->mtx);
2711                 INIT_LIST_HEAD(&wdev->event_list);
2712                 spin_lock_init(&wdev->event_lock);
2713                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2714                 spin_lock_init(&wdev->mgmt_registrations_lock);
2715
2716                 wdev->identifier = ++rdev->wdev_id;
2717                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2718                 rdev->devlist_generation++;
2719                 break;
2720         default:
2721                 break;
2722         }
2723
2724         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2725                                rdev, wdev, false) < 0) {
2726                 nlmsg_free(msg);
2727                 return -ENOBUFS;
2728         }
2729
2730         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2731         if (event) {
2732                 if (nl80211_send_iface(event, 0, 0, 0,
2733                                        rdev, wdev, false) < 0) {
2734                         nlmsg_free(event);
2735                         goto out;
2736                 }
2737
2738                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2739                                         event, 0, NL80211_MCGRP_CONFIG,
2740                                         GFP_KERNEL);
2741         }
2742
2743 out:
2744         return genlmsg_reply(msg, info);
2745 }
2746
2747 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2748 {
2749         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2750         struct wireless_dev *wdev = info->user_ptr[1];
2751         struct sk_buff *msg;
2752         int status;
2753
2754         if (!rdev->ops->del_virtual_intf)
2755                 return -EOPNOTSUPP;
2756
2757         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2758         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2759                 nlmsg_free(msg);
2760                 msg = NULL;
2761         }
2762
2763         /*
2764          * If we remove a wireless device without a netdev then clear
2765          * user_ptr[1] so that nl80211_post_doit won't dereference it
2766          * to check if it needs to do dev_put(). Otherwise it crashes
2767          * since the wdev has been freed, unlike with a netdev where
2768          * we need the dev_put() for the netdev to really be freed.
2769          */
2770         if (!wdev->netdev)
2771                 info->user_ptr[1] = NULL;
2772
2773         status = rdev_del_virtual_intf(rdev, wdev);
2774         if (status >= 0 && msg)
2775                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2776                                         msg, 0, NL80211_MCGRP_CONFIG,
2777                                         GFP_KERNEL);
2778         else
2779                 nlmsg_free(msg);
2780
2781         return status;
2782 }
2783
2784 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2785 {
2786         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2787         struct net_device *dev = info->user_ptr[1];
2788         u16 noack_map;
2789
2790         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2791                 return -EINVAL;
2792
2793         if (!rdev->ops->set_noack_map)
2794                 return -EOPNOTSUPP;
2795
2796         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2797
2798         return rdev_set_noack_map(rdev, dev, noack_map);
2799 }
2800
2801 struct get_key_cookie {
2802         struct sk_buff *msg;
2803         int error;
2804         int idx;
2805 };
2806
2807 static void get_key_callback(void *c, struct key_params *params)
2808 {
2809         struct nlattr *key;
2810         struct get_key_cookie *cookie = c;
2811
2812         if ((params->key &&
2813              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2814                      params->key_len, params->key)) ||
2815             (params->seq &&
2816              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2817                      params->seq_len, params->seq)) ||
2818             (params->cipher &&
2819              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2820                          params->cipher)))
2821                 goto nla_put_failure;
2822
2823         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2824         if (!key)
2825                 goto nla_put_failure;
2826
2827         if ((params->key &&
2828              nla_put(cookie->msg, NL80211_KEY_DATA,
2829                      params->key_len, params->key)) ||
2830             (params->seq &&
2831              nla_put(cookie->msg, NL80211_KEY_SEQ,
2832                      params->seq_len, params->seq)) ||
2833             (params->cipher &&
2834              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2835                          params->cipher)))
2836                 goto nla_put_failure;
2837
2838         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2839                 goto nla_put_failure;
2840
2841         nla_nest_end(cookie->msg, key);
2842
2843         return;
2844  nla_put_failure:
2845         cookie->error = 1;
2846 }
2847
2848 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2849 {
2850         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2851         int err;
2852         struct net_device *dev = info->user_ptr[1];
2853         u8 key_idx = 0;
2854         const u8 *mac_addr = NULL;
2855         bool pairwise;
2856         struct get_key_cookie cookie = {
2857                 .error = 0,
2858         };
2859         void *hdr;
2860         struct sk_buff *msg;
2861
2862         if (info->attrs[NL80211_ATTR_KEY_IDX])
2863                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2864
2865         if (key_idx > 5)
2866                 return -EINVAL;
2867
2868         if (info->attrs[NL80211_ATTR_MAC])
2869                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2870
2871         pairwise = !!mac_addr;
2872         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2873                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2874                 if (kt >= NUM_NL80211_KEYTYPES)
2875                         return -EINVAL;
2876                 if (kt != NL80211_KEYTYPE_GROUP &&
2877                     kt != NL80211_KEYTYPE_PAIRWISE)
2878                         return -EINVAL;
2879                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2880         }
2881
2882         if (!rdev->ops->get_key)
2883                 return -EOPNOTSUPP;
2884
2885         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2886                 return -ENOENT;
2887
2888         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2889         if (!msg)
2890                 return -ENOMEM;
2891
2892         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2893                              NL80211_CMD_NEW_KEY);
2894         if (!hdr)
2895                 goto nla_put_failure;
2896
2897         cookie.msg = msg;
2898         cookie.idx = key_idx;
2899
2900         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2901             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2902                 goto nla_put_failure;
2903         if (mac_addr &&
2904             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2905                 goto nla_put_failure;
2906
2907         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2908                            get_key_callback);
2909
2910         if (err)
2911                 goto free_msg;
2912
2913         if (cookie.error)
2914                 goto nla_put_failure;
2915
2916         genlmsg_end(msg, hdr);
2917         return genlmsg_reply(msg, info);
2918
2919  nla_put_failure:
2920         err = -ENOBUFS;
2921  free_msg:
2922         nlmsg_free(msg);
2923         return err;
2924 }
2925
2926 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2927 {
2928         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2929         struct key_parse key;
2930         int err;
2931         struct net_device *dev = info->user_ptr[1];
2932
2933         err = nl80211_parse_key(info, &key);
2934         if (err)
2935                 return err;
2936
2937         if (key.idx < 0)
2938                 return -EINVAL;
2939
2940         /* only support setting default key */
2941         if (!key.def && !key.defmgmt)
2942                 return -EINVAL;
2943
2944         wdev_lock(dev->ieee80211_ptr);
2945
2946         if (key.def) {
2947                 if (!rdev->ops->set_default_key) {
2948                         err = -EOPNOTSUPP;
2949                         goto out;
2950                 }
2951
2952                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2953                 if (err)
2954                         goto out;
2955
2956                 err = rdev_set_default_key(rdev, dev, key.idx,
2957                                                  key.def_uni, key.def_multi);
2958
2959                 if (err)
2960                         goto out;
2961
2962 #ifdef CONFIG_CFG80211_WEXT
2963                 dev->ieee80211_ptr->wext.default_key = key.idx;
2964 #endif
2965         } else {
2966                 if (key.def_uni || !key.def_multi) {
2967                         err = -EINVAL;
2968                         goto out;
2969                 }
2970
2971                 if (!rdev->ops->set_default_mgmt_key) {
2972                         err = -EOPNOTSUPP;
2973                         goto out;
2974                 }
2975
2976                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2977                 if (err)
2978                         goto out;
2979
2980                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2981                 if (err)
2982                         goto out;
2983
2984 #ifdef CONFIG_CFG80211_WEXT
2985                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2986 #endif
2987         }
2988
2989  out:
2990         wdev_unlock(dev->ieee80211_ptr);
2991
2992         return err;
2993 }
2994
2995 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2996 {
2997         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2998         int err;
2999         struct net_device *dev = info->user_ptr[1];
3000         struct key_parse key;
3001         const u8 *mac_addr = NULL;
3002
3003         err = nl80211_parse_key(info, &key);
3004         if (err)
3005                 return err;
3006
3007         if (!key.p.key)
3008                 return -EINVAL;
3009
3010         if (info->attrs[NL80211_ATTR_MAC])
3011                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3012
3013         if (key.type == -1) {
3014                 if (mac_addr)
3015                         key.type = NL80211_KEYTYPE_PAIRWISE;
3016                 else
3017                         key.type = NL80211_KEYTYPE_GROUP;
3018         }
3019
3020         /* for now */
3021         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3022             key.type != NL80211_KEYTYPE_GROUP)
3023                 return -EINVAL;
3024
3025         if (!rdev->ops->add_key)
3026                 return -EOPNOTSUPP;
3027
3028         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3029                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3030                                            mac_addr))
3031                 return -EINVAL;
3032
3033         wdev_lock(dev->ieee80211_ptr);
3034         err = nl80211_key_allowed(dev->ieee80211_ptr);
3035         if (!err)
3036                 err = rdev_add_key(rdev, dev, key.idx,
3037                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3038                                     mac_addr, &key.p);
3039         wdev_unlock(dev->ieee80211_ptr);
3040
3041         return err;
3042 }
3043
3044 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3045 {
3046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3047         int err;
3048         struct net_device *dev = info->user_ptr[1];
3049         u8 *mac_addr = NULL;
3050         struct key_parse key;
3051
3052         err = nl80211_parse_key(info, &key);
3053         if (err)
3054                 return err;
3055
3056         if (info->attrs[NL80211_ATTR_MAC])
3057                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3058
3059         if (key.type == -1) {
3060                 if (mac_addr)
3061                         key.type = NL80211_KEYTYPE_PAIRWISE;
3062                 else
3063                         key.type = NL80211_KEYTYPE_GROUP;
3064         }
3065
3066         /* for now */
3067         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3068             key.type != NL80211_KEYTYPE_GROUP)
3069                 return -EINVAL;
3070
3071         if (!rdev->ops->del_key)
3072                 return -EOPNOTSUPP;
3073
3074         wdev_lock(dev->ieee80211_ptr);
3075         err = nl80211_key_allowed(dev->ieee80211_ptr);
3076
3077         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3078             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3079                 err = -ENOENT;
3080
3081         if (!err)
3082                 err = rdev_del_key(rdev, dev, key.idx,
3083                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3084                                    mac_addr);
3085
3086 #ifdef CONFIG_CFG80211_WEXT
3087         if (!err) {
3088                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3089                         dev->ieee80211_ptr->wext.default_key = -1;
3090                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3091                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3092         }
3093 #endif
3094         wdev_unlock(dev->ieee80211_ptr);
3095
3096         return err;
3097 }
3098
3099 /* This function returns an error or the number of nested attributes */
3100 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3101 {
3102         struct nlattr *attr;
3103         int n_entries = 0, tmp;
3104
3105         nla_for_each_nested(attr, nl_attr, tmp) {
3106                 if (nla_len(attr) != ETH_ALEN)
3107                         return -EINVAL;
3108
3109                 n_entries++;
3110         }
3111
3112         return n_entries;
3113 }
3114
3115 /*
3116  * This function parses ACL information and allocates memory for ACL data.
3117  * On successful return, the calling function is responsible to free the
3118  * ACL buffer returned by this function.
3119  */
3120 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3121                                                 struct genl_info *info)
3122 {
3123         enum nl80211_acl_policy acl_policy;
3124         struct nlattr *attr;
3125         struct cfg80211_acl_data *acl;
3126         int i = 0, n_entries, tmp;
3127
3128         if (!wiphy->max_acl_mac_addrs)
3129                 return ERR_PTR(-EOPNOTSUPP);
3130
3131         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3132                 return ERR_PTR(-EINVAL);
3133
3134         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3135         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3136             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3137                 return ERR_PTR(-EINVAL);
3138
3139         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3140                 return ERR_PTR(-EINVAL);
3141
3142         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3143         if (n_entries < 0)
3144                 return ERR_PTR(n_entries);
3145
3146         if (n_entries > wiphy->max_acl_mac_addrs)
3147                 return ERR_PTR(-ENOTSUPP);
3148
3149         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3150                       GFP_KERNEL);
3151         if (!acl)
3152                 return ERR_PTR(-ENOMEM);
3153
3154         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3155                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3156                 i++;
3157         }
3158
3159         acl->n_acl_entries = n_entries;
3160         acl->acl_policy = acl_policy;
3161
3162         return acl;
3163 }
3164
3165 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3166 {
3167         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3168         struct net_device *dev = info->user_ptr[1];
3169         struct cfg80211_acl_data *acl;
3170         int err;
3171
3172         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3173             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3174                 return -EOPNOTSUPP;
3175
3176         if (!dev->ieee80211_ptr->beacon_interval)
3177                 return -EINVAL;
3178
3179         acl = parse_acl_data(&rdev->wiphy, info);
3180         if (IS_ERR(acl))
3181                 return PTR_ERR(acl);
3182
3183         err = rdev_set_mac_acl(rdev, dev, acl);
3184
3185         kfree(acl);
3186
3187         return err;
3188 }
3189
3190 static int nl80211_parse_beacon(struct nlattr *attrs[],
3191                                 struct cfg80211_beacon_data *bcn)
3192 {
3193         bool haveinfo = false;
3194
3195         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3196             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3197             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3198             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3199                 return -EINVAL;
3200
3201         memset(bcn, 0, sizeof(*bcn));
3202
3203         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3204                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3205                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3206                 if (!bcn->head_len)
3207                         return -EINVAL;
3208                 haveinfo = true;
3209         }
3210
3211         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3212                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3213                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3214                 haveinfo = true;
3215         }
3216
3217         if (!haveinfo)
3218                 return -EINVAL;
3219
3220         if (attrs[NL80211_ATTR_IE]) {
3221                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3222                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3223         }
3224
3225         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3226                 bcn->proberesp_ies =
3227                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3228                 bcn->proberesp_ies_len =
3229                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3230         }
3231
3232         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3233                 bcn->assocresp_ies =
3234                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3235                 bcn->assocresp_ies_len =
3236                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3237         }
3238
3239         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3240                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3241                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3242         }
3243
3244         return 0;
3245 }
3246
3247 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3248                                    struct cfg80211_ap_settings *params)
3249 {
3250         struct wireless_dev *wdev;
3251         bool ret = false;
3252
3253         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3254                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3255                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3256                         continue;
3257
3258                 if (!wdev->preset_chandef.chan)
3259                         continue;
3260
3261                 params->chandef = wdev->preset_chandef;
3262                 ret = true;
3263                 break;
3264         }
3265
3266         return ret;
3267 }
3268
3269 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3270                                     enum nl80211_auth_type auth_type,
3271                                     enum nl80211_commands cmd)
3272 {
3273         if (auth_type > NL80211_AUTHTYPE_MAX)
3274                 return false;
3275
3276         switch (cmd) {
3277         case NL80211_CMD_AUTHENTICATE:
3278                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3279                     auth_type == NL80211_AUTHTYPE_SAE)
3280                         return false;
3281                 return true;
3282         case NL80211_CMD_CONNECT:
3283         case NL80211_CMD_START_AP:
3284                 /* SAE not supported yet */
3285                 if (auth_type == NL80211_AUTHTYPE_SAE)
3286                         return false;
3287                 return true;
3288         default:
3289                 return false;
3290         }
3291 }
3292
3293 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3294 {
3295         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3296         struct net_device *dev = info->user_ptr[1];
3297         struct wireless_dev *wdev = dev->ieee80211_ptr;
3298         struct cfg80211_ap_settings params;
3299         int err;
3300
3301         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3303                 return -EOPNOTSUPP;
3304
3305         if (!rdev->ops->start_ap)
3306                 return -EOPNOTSUPP;
3307
3308         if (wdev->beacon_interval)
3309                 return -EALREADY;
3310
3311         memset(&params, 0, sizeof(params));
3312
3313         /* these are required for START_AP */
3314         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3315             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3316             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3317                 return -EINVAL;
3318
3319         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3320         if (err)
3321                 return err;
3322
3323         params.beacon_interval =
3324                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3325         params.dtim_period =
3326                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3327
3328         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3329         if (err)
3330                 return err;
3331
3332         /*
3333          * In theory, some of these attributes should be required here
3334          * but since they were not used when the command was originally
3335          * added, keep them optional for old user space programs to let
3336          * them continue to work with drivers that do not need the
3337          * additional information -- drivers must check!
3338          */
3339         if (info->attrs[NL80211_ATTR_SSID]) {
3340                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3341                 params.ssid_len =
3342                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3343                 if (params.ssid_len == 0 ||
3344                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3345                         return -EINVAL;
3346         }
3347
3348         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3349                 params.hidden_ssid = nla_get_u32(
3350                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3351                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3352                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3353                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3354                         return -EINVAL;
3355         }
3356
3357         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3358
3359         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3360                 params.auth_type = nla_get_u32(
3361                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3362                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3363                                              NL80211_CMD_START_AP))
3364                         return -EINVAL;
3365         } else
3366                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3367
3368         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3369                                       NL80211_MAX_NR_CIPHER_SUITES);
3370         if (err)
3371                 return err;
3372
3373         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3374                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3375                         return -EOPNOTSUPP;
3376                 params.inactivity_timeout = nla_get_u16(
3377                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3378         }
3379
3380         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3381                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3382                         return -EINVAL;
3383                 params.p2p_ctwindow =
3384                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3385                 if (params.p2p_ctwindow > 127)
3386                         return -EINVAL;
3387                 if (params.p2p_ctwindow != 0 &&
3388                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3389                         return -EINVAL;
3390         }
3391
3392         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3393                 u8 tmp;
3394
3395                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3396                         return -EINVAL;
3397                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3398                 if (tmp > 1)
3399                         return -EINVAL;
3400                 params.p2p_opp_ps = tmp;
3401                 if (params.p2p_opp_ps != 0 &&
3402                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3403                         return -EINVAL;
3404         }
3405
3406         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3407                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3408                 if (err)
3409                         return err;
3410         } else if (wdev->preset_chandef.chan) {
3411                 params.chandef = wdev->preset_chandef;
3412         } else if (!nl80211_get_ap_channel(rdev, &params))
3413                 return -EINVAL;
3414
3415         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3416                                            wdev->iftype))
3417                 return -EINVAL;
3418
3419         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3420                 params.smps_mode =
3421                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3422                 switch (params.smps_mode) {
3423                 case NL80211_SMPS_OFF:
3424                         break;
3425                 case NL80211_SMPS_STATIC:
3426                         if (!(rdev->wiphy.features &
3427                               NL80211_FEATURE_STATIC_SMPS))
3428                                 return -EINVAL;
3429                         break;
3430                 case NL80211_SMPS_DYNAMIC:
3431                         if (!(rdev->wiphy.features &
3432                               NL80211_FEATURE_DYNAMIC_SMPS))
3433                                 return -EINVAL;
3434                         break;
3435                 default:
3436                         return -EINVAL;
3437                 }
3438         } else {
3439                 params.smps_mode = NL80211_SMPS_OFF;
3440         }
3441
3442         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3443                 params.acl = parse_acl_data(&rdev->wiphy, info);
3444                 if (IS_ERR(params.acl))
3445                         return PTR_ERR(params.acl);
3446         }
3447
3448         wdev_lock(wdev);
3449         err = rdev_start_ap(rdev, dev, &params);
3450         if (!err) {
3451                 wdev->preset_chandef = params.chandef;
3452                 wdev->beacon_interval = params.beacon_interval;
3453                 wdev->chandef = params.chandef;
3454                 wdev->ssid_len = params.ssid_len;
3455                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3456         }
3457         wdev_unlock(wdev);
3458
3459         kfree(params.acl);
3460
3461         return err;
3462 }
3463
3464 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3465 {
3466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3467         struct net_device *dev = info->user_ptr[1];
3468         struct wireless_dev *wdev = dev->ieee80211_ptr;
3469         struct cfg80211_beacon_data params;
3470         int err;
3471
3472         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3473             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3474                 return -EOPNOTSUPP;
3475
3476         if (!rdev->ops->change_beacon)
3477                 return -EOPNOTSUPP;
3478
3479         if (!wdev->beacon_interval)
3480                 return -EINVAL;
3481
3482         err = nl80211_parse_beacon(info->attrs, &params);
3483         if (err)
3484                 return err;
3485
3486         wdev_lock(wdev);
3487         err = rdev_change_beacon(rdev, dev, &params);
3488         wdev_unlock(wdev);
3489
3490         return err;
3491 }
3492
3493 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3494 {
3495         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3496         struct net_device *dev = info->user_ptr[1];
3497
3498         return cfg80211_stop_ap(rdev, dev, false);
3499 }
3500
3501 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3502         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3503         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3504         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3505         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3506         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3507         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3508 };
3509
3510 static int parse_station_flags(struct genl_info *info,
3511                                enum nl80211_iftype iftype,
3512                                struct station_parameters *params)
3513 {
3514         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3515         struct nlattr *nla;
3516         int flag;
3517
3518         /*
3519          * Try parsing the new attribute first so userspace
3520          * can specify both for older kernels.
3521          */
3522         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3523         if (nla) {
3524                 struct nl80211_sta_flag_update *sta_flags;
3525
3526                 sta_flags = nla_data(nla);
3527                 params->sta_flags_mask = sta_flags->mask;
3528                 params->sta_flags_set = sta_flags->set;
3529                 params->sta_flags_set &= params->sta_flags_mask;
3530                 if ((params->sta_flags_mask |
3531                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3532                         return -EINVAL;
3533                 return 0;
3534         }
3535
3536         /* if present, parse the old attribute */
3537
3538         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3539         if (!nla)
3540                 return 0;
3541
3542         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3543                              nla, sta_flags_policy))
3544                 return -EINVAL;
3545
3546         /*
3547          * Only allow certain flags for interface types so that
3548          * other attributes are silently ignored. Remember that
3549          * this is backward compatibility code with old userspace
3550          * and shouldn't be hit in other cases anyway.
3551          */
3552         switch (iftype) {
3553         case NL80211_IFTYPE_AP:
3554         case NL80211_IFTYPE_AP_VLAN:
3555         case NL80211_IFTYPE_P2P_GO:
3556                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3557                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3558                                          BIT(NL80211_STA_FLAG_WME) |
3559                                          BIT(NL80211_STA_FLAG_MFP);
3560                 break;
3561         case NL80211_IFTYPE_P2P_CLIENT:
3562         case NL80211_IFTYPE_STATION:
3563                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3564                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3565                 break;
3566         case NL80211_IFTYPE_MESH_POINT:
3567                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3568                                          BIT(NL80211_STA_FLAG_MFP) |
3569                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3570         default:
3571                 return -EINVAL;
3572         }
3573
3574         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3575                 if (flags[flag]) {
3576                         params->sta_flags_set |= (1<<flag);
3577
3578                         /* no longer support new API additions in old API */
3579                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3580                                 return -EINVAL;
3581                 }
3582         }
3583
3584         return 0;
3585 }
3586
3587 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3588                                  int attr)
3589 {
3590         struct nlattr *rate;
3591         u32 bitrate;
3592         u16 bitrate_compat;
3593         enum nl80211_attrs rate_flg;
3594
3595         rate = nla_nest_start(msg, attr);
3596         if (!rate)
3597                 return false;
3598
3599         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3600         bitrate = cfg80211_calculate_bitrate(info);
3601         /* report 16-bit bitrate only if we can */
3602         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3603         if (bitrate > 0 &&
3604             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3605                 return false;
3606         if (bitrate_compat > 0 &&
3607             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3608                 return false;
3609
3610         switch (info->bw) {
3611         case RATE_INFO_BW_5:
3612                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3613                 break;
3614         case RATE_INFO_BW_10:
3615                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3616                 break;
3617         default:
3618                 WARN_ON(1);
3619                 /* fall through */
3620         case RATE_INFO_BW_20:
3621                 rate_flg = 0;
3622                 break;
3623         case RATE_INFO_BW_40:
3624                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3625                 break;
3626         case RATE_INFO_BW_80:
3627                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3628                 break;
3629         case RATE_INFO_BW_160:
3630                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3631                 break;
3632         }
3633
3634         if (rate_flg && nla_put_flag(msg, rate_flg))
3635                 return false;
3636
3637         if (info->flags & RATE_INFO_FLAGS_MCS) {
3638                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3639                         return false;
3640                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3641                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3642                         return false;
3643         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3644                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3645                         return false;
3646                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3647                         return false;
3648                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3649                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3650                         return false;
3651         }
3652
3653         nla_nest_end(msg, rate);
3654         return true;
3655 }
3656
3657 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3658                                int id)
3659 {
3660         void *attr;
3661         int i = 0;
3662
3663         if (!mask)
3664                 return true;
3665
3666         attr = nla_nest_start(msg, id);
3667         if (!attr)
3668                 return false;
3669
3670         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3671                 if (!(mask & BIT(i)))
3672                         continue;
3673
3674                 if (nla_put_u8(msg, i, signal[i]))
3675                         return false;
3676         }
3677
3678         nla_nest_end(msg, attr);
3679
3680         return true;
3681 }
3682
3683 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3684                                 u32 seq, int flags,
3685                                 struct cfg80211_registered_device *rdev,
3686                                 struct net_device *dev,
3687                                 const u8 *mac_addr, struct station_info *sinfo)
3688 {
3689         void *hdr;
3690         struct nlattr *sinfoattr, *bss_param;
3691
3692         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3693         if (!hdr)
3694                 return -1;
3695
3696         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3697             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3698             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3699                 goto nla_put_failure;
3700
3701         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3702         if (!sinfoattr)
3703                 goto nla_put_failure;
3704
3705 #define PUT_SINFO(attr, memb, type) do {                                \
3706         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3707             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3708                              sinfo->memb))                              \
3709                 goto nla_put_failure;                                   \
3710         } while (0)
3711
3712         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3713         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3714
3715         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3716                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3717             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3718                         (u32)sinfo->rx_bytes))
3719                 goto nla_put_failure;
3720
3721         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3722                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3723             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3724                         (u32)sinfo->tx_bytes))
3725                 goto nla_put_failure;
3726
3727         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3728         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3729         PUT_SINFO(LLID, llid, u16);
3730         PUT_SINFO(PLID, plid, u16);
3731         PUT_SINFO(PLINK_STATE, plink_state, u8);
3732
3733         switch (rdev->wiphy.signal_type) {
3734         case CFG80211_SIGNAL_TYPE_MBM:
3735                 PUT_SINFO(SIGNAL, signal, u8);
3736                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3737                 break;
3738         default:
3739                 break;
3740         }
3741         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3742                 if (!nl80211_put_signal(msg, sinfo->chains,
3743                                         sinfo->chain_signal,
3744                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3745                         goto nla_put_failure;
3746         }
3747         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3748                 if (!nl80211_put_signal(msg, sinfo->chains,
3749                                         sinfo->chain_signal_avg,
3750                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3751                         goto nla_put_failure;
3752         }
3753         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3754                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3755                                           NL80211_STA_INFO_TX_BITRATE))
3756                         goto nla_put_failure;
3757         }
3758         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3759                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3760                                           NL80211_STA_INFO_RX_BITRATE))
3761                         goto nla_put_failure;
3762         }
3763
3764         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3765         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3766         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3767         PUT_SINFO(TX_FAILED, tx_failed, u32);
3768         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3769         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3770         PUT_SINFO(LOCAL_PM, local_pm, u32);
3771         PUT_SINFO(PEER_PM, peer_pm, u32);
3772         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3773
3774         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3775                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3776                 if (!bss_param)
3777                         goto nla_put_failure;
3778
3779                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3780                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3781                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3782                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3783                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3784                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3785                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3786                                sinfo->bss_param.dtim_period) ||
3787                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3788                                 sinfo->bss_param.beacon_interval))
3789                         goto nla_put_failure;
3790
3791                 nla_nest_end(msg, bss_param);
3792         }
3793         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3794             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3795                     sizeof(struct nl80211_sta_flag_update),
3796                     &sinfo->sta_flags))
3797                 goto nla_put_failure;
3798
3799         PUT_SINFO(T_OFFSET, t_offset, u64);
3800         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3801         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3802         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3803
3804 #undef PUT_SINFO
3805
3806         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3807                 struct nlattr *tidsattr;
3808                 int tid;
3809
3810                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3811                 if (!tidsattr)
3812                         goto nla_put_failure;
3813
3814                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3815                         struct cfg80211_tid_stats *tidstats;
3816                         struct nlattr *tidattr;
3817
3818                         tidstats = &sinfo->pertid[tid];
3819
3820                         if (!tidstats->filled)
3821                                 continue;
3822
3823                         tidattr = nla_nest_start(msg, tid + 1);
3824                         if (!tidattr)
3825                                 goto nla_put_failure;
3826
3827 #define PUT_TIDVAL(attr, memb, type) do {                               \
3828         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3829             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3830                              tidstats->memb))                           \
3831                 goto nla_put_failure;                                   \
3832         } while (0)
3833
3834                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3835                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3836                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3837                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3838
3839 #undef PUT_TIDVAL
3840                         nla_nest_end(msg, tidattr);
3841                 }
3842
3843                 nla_nest_end(msg, tidsattr);
3844         }
3845
3846         nla_nest_end(msg, sinfoattr);
3847
3848         if (sinfo->assoc_req_ies_len &&
3849             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3850                     sinfo->assoc_req_ies))
3851                 goto nla_put_failure;
3852
3853         genlmsg_end(msg, hdr);
3854         return 0;
3855
3856  nla_put_failure:
3857         genlmsg_cancel(msg, hdr);
3858         return -EMSGSIZE;
3859 }
3860
3861 static int nl80211_dump_station(struct sk_buff *skb,
3862                                 struct netlink_callback *cb)
3863 {
3864         struct station_info sinfo;
3865         struct cfg80211_registered_device *rdev;
3866         struct wireless_dev *wdev;
3867         u8 mac_addr[ETH_ALEN];
3868         int sta_idx = cb->args[2];
3869         int err;
3870
3871         rtnl_lock();
3872         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3873         if (err)
3874                 goto out_err;
3875
3876         if (!wdev->netdev) {
3877                 err = -EINVAL;
3878                 goto out_err;
3879         }
3880
3881         if (!rdev->ops->dump_station) {
3882                 err = -EOPNOTSUPP;
3883                 goto out_err;
3884         }
3885
3886         while (1) {
3887                 memset(&sinfo, 0, sizeof(sinfo));
3888                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3889                                         mac_addr, &sinfo);
3890                 if (err == -ENOENT)
3891                         break;
3892                 if (err)
3893                         goto out_err;
3894
3895                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3896                                 NETLINK_CB(cb->skb).portid,
3897                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3898                                 rdev, wdev->netdev, mac_addr,
3899                                 &sinfo) < 0)
3900                         goto out;
3901
3902                 sta_idx++;
3903         }
3904
3905
3906  out:
3907         cb->args[2] = sta_idx;
3908         err = skb->len;
3909  out_err:
3910         rtnl_unlock();
3911
3912         return err;
3913 }
3914
3915 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3916 {
3917         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3918         struct net_device *dev = info->user_ptr[1];
3919         struct station_info sinfo;
3920         struct sk_buff *msg;
3921         u8 *mac_addr = NULL;
3922         int err;
3923
3924         memset(&sinfo, 0, sizeof(sinfo));
3925
3926         if (!info->attrs[NL80211_ATTR_MAC])
3927                 return -EINVAL;
3928
3929         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3930
3931         if (!rdev->ops->get_station)
3932                 return -EOPNOTSUPP;
3933
3934         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3935         if (err)
3936                 return err;
3937
3938         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3939         if (!msg)
3940                 return -ENOMEM;
3941
3942         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
3943                                  info->snd_portid, info->snd_seq, 0,
3944                                  rdev, dev, mac_addr, &sinfo) < 0) {
3945                 nlmsg_free(msg);
3946                 return -ENOBUFS;
3947         }
3948
3949         return genlmsg_reply(msg, info);
3950 }
3951
3952 int cfg80211_check_station_change(struct wiphy *wiphy,
3953                                   struct station_parameters *params,
3954                                   enum cfg80211_station_type statype)
3955 {
3956         if (params->listen_interval != -1 &&
3957             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
3958                 return -EINVAL;
3959
3960         if (params->aid &&
3961             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
3962             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
3963                 return -EINVAL;
3964
3965         /* When you run into this, adjust the code below for the new flag */
3966         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3967
3968         switch (statype) {
3969         case CFG80211_STA_MESH_PEER_KERNEL:
3970         case CFG80211_STA_MESH_PEER_USER:
3971                 /*
3972                  * No ignoring the TDLS flag here -- the userspace mesh
3973                  * code doesn't have the bug of including TDLS in the
3974                  * mask everywhere.
3975                  */
3976                 if (params->sta_flags_mask &
3977                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3978                                   BIT(NL80211_STA_FLAG_MFP) |
3979                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3980                         return -EINVAL;
3981                 break;
3982         case CFG80211_STA_TDLS_PEER_SETUP:
3983         case CFG80211_STA_TDLS_PEER_ACTIVE:
3984                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3985                         return -EINVAL;
3986                 /* ignore since it can't change */
3987                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3988                 break;
3989         default:
3990                 /* disallow mesh-specific things */
3991                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3992                         return -EINVAL;
3993                 if (params->local_pm)
3994                         return -EINVAL;
3995                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3996                         return -EINVAL;
3997         }
3998
3999         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4000             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4001                 /* TDLS can't be set, ... */
4002                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4003                         return -EINVAL;
4004                 /*
4005                  * ... but don't bother the driver with it. This works around
4006                  * a hostapd/wpa_supplicant issue -- it always includes the
4007                  * TLDS_PEER flag in the mask even for AP mode.
4008                  */
4009                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4010         }
4011
4012         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4013             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4014                 /* reject other things that can't change */
4015                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4016                         return -EINVAL;
4017                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4018                         return -EINVAL;
4019                 if (params->supported_rates)
4020                         return -EINVAL;
4021                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4022                         return -EINVAL;
4023         }
4024
4025         if (statype != CFG80211_STA_AP_CLIENT &&
4026             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4027                 if (params->vlan)
4028                         return -EINVAL;
4029         }
4030
4031         switch (statype) {
4032         case CFG80211_STA_AP_MLME_CLIENT:
4033                 /* Use this only for authorizing/unauthorizing a station */
4034                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4035                         return -EOPNOTSUPP;
4036                 break;
4037         case CFG80211_STA_AP_CLIENT:
4038         case CFG80211_STA_AP_CLIENT_UNASSOC:
4039                 /* accept only the listed bits */
4040                 if (params->sta_flags_mask &
4041                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4042                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4043                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4044                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4045                                   BIT(NL80211_STA_FLAG_WME) |
4046                                   BIT(NL80211_STA_FLAG_MFP)))
4047                         return -EINVAL;
4048
4049                 /* but authenticated/associated only if driver handles it */
4050                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4051                     params->sta_flags_mask &
4052                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4053                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4054                         return -EINVAL;
4055                 break;
4056         case CFG80211_STA_IBSS:
4057         case CFG80211_STA_AP_STA:
4058                 /* reject any changes other than AUTHORIZED */
4059                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4060                         return -EINVAL;
4061                 break;
4062         case CFG80211_STA_TDLS_PEER_SETUP:
4063                 /* reject any changes other than AUTHORIZED or WME */
4064                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4065                                                BIT(NL80211_STA_FLAG_WME)))
4066                         return -EINVAL;
4067                 /* force (at least) rates when authorizing */
4068                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4069                     !params->supported_rates)
4070                         return -EINVAL;
4071                 break;
4072         case CFG80211_STA_TDLS_PEER_ACTIVE:
4073                 /* reject any changes */
4074                 return -EINVAL;
4075         case CFG80211_STA_MESH_PEER_KERNEL:
4076                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4077                         return -EINVAL;
4078                 break;
4079         case CFG80211_STA_MESH_PEER_USER:
4080                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4081                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4082                         return -EINVAL;
4083                 break;
4084         }
4085
4086         return 0;
4087 }
4088 EXPORT_SYMBOL(cfg80211_check_station_change);
4089
4090 /*
4091  * Get vlan interface making sure it is running and on the right wiphy.
4092  */
4093 static struct net_device *get_vlan(struct genl_info *info,
4094                                    struct cfg80211_registered_device *rdev)
4095 {
4096         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4097         struct net_device *v;
4098         int ret;
4099
4100         if (!vlanattr)
4101                 return NULL;
4102
4103         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4104         if (!v)
4105                 return ERR_PTR(-ENODEV);
4106
4107         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4108                 ret = -EINVAL;
4109                 goto error;
4110         }
4111
4112         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4113             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4114             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4115                 ret = -EINVAL;
4116                 goto error;
4117         }
4118
4119         if (!netif_running(v)) {
4120                 ret = -ENETDOWN;
4121                 goto error;
4122         }
4123
4124         return v;
4125  error:
4126         dev_put(v);
4127         return ERR_PTR(ret);
4128 }
4129
4130 static const struct nla_policy
4131 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4132         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4133         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4134 };
4135
4136 static int nl80211_parse_sta_wme(struct genl_info *info,
4137                                  struct station_parameters *params)
4138 {
4139         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4140         struct nlattr *nla;
4141         int err;
4142
4143         /* parse WME attributes if present */
4144         if (!info->attrs[NL80211_ATTR_STA_WME])
4145                 return 0;
4146
4147         nla = info->attrs[NL80211_ATTR_STA_WME];
4148         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4149                                nl80211_sta_wme_policy);
4150         if (err)
4151                 return err;
4152
4153         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4154                 params->uapsd_queues = nla_get_u8(
4155                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4156         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4157                 return -EINVAL;
4158
4159         if (tb[NL80211_STA_WME_MAX_SP])
4160                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4161
4162         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4163                 return -EINVAL;
4164
4165         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4166
4167         return 0;
4168 }
4169
4170 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4171                                       struct station_parameters *params)
4172 {
4173         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4174                 params->supported_channels =
4175                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4176                 params->supported_channels_len =
4177                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4178                 /*
4179                  * Need to include at least one (first channel, number of
4180                  * channels) tuple for each subband, and must have proper
4181                  * tuples for the rest of the data as well.
4182                  */
4183                 if (params->supported_channels_len < 2)
4184                         return -EINVAL;
4185                 if (params->supported_channels_len % 2)
4186                         return -EINVAL;
4187         }
4188
4189         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4190                 params->supported_oper_classes =
4191                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4192                 params->supported_oper_classes_len =
4193                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4194                 /*
4195                  * The value of the Length field of the Supported Operating
4196                  * Classes element is between 2 and 253.
4197                  */
4198                 if (params->supported_oper_classes_len < 2 ||
4199                     params->supported_oper_classes_len > 253)
4200                         return -EINVAL;
4201         }
4202         return 0;
4203 }
4204
4205 static int nl80211_set_station_tdls(struct genl_info *info,
4206                                     struct station_parameters *params)
4207 {
4208         int err;
4209         /* Dummy STA entry gets updated once the peer capabilities are known */
4210         if (info->attrs[NL80211_ATTR_PEER_AID])
4211                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4212         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4213                 params->ht_capa =
4214                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4215         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4216                 params->vht_capa =
4217                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4218
4219         err = nl80211_parse_sta_channel_info(info, params);
4220         if (err)
4221                 return err;
4222
4223         return nl80211_parse_sta_wme(info, params);
4224 }
4225
4226 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4227 {
4228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4229         struct net_device *dev = info->user_ptr[1];
4230         struct station_parameters params;
4231         u8 *mac_addr;
4232         int err;
4233
4234         memset(&params, 0, sizeof(params));
4235
4236         if (!rdev->ops->change_station)
4237                 return -EOPNOTSUPP;
4238
4239         /*
4240          * AID and listen_interval properties can be set only for unassociated
4241          * station. Include these parameters here and will check them in
4242          * cfg80211_check_station_change().
4243          */
4244         if (info->attrs[NL80211_ATTR_PEER_AID])
4245                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4246
4247         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4248                 params.listen_interval =
4249                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4250         else
4251                 params.listen_interval = -1;
4252
4253         if (!info->attrs[NL80211_ATTR_MAC])
4254                 return -EINVAL;
4255
4256         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4257
4258         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4259                 params.supported_rates =
4260                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4261                 params.supported_rates_len =
4262                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4263         }
4264
4265         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4266                 params.capability =
4267                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4268                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4269         }
4270
4271         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4272                 params.ext_capab =
4273                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4274                 params.ext_capab_len =
4275                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4276         }
4277
4278         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4279                 return -EINVAL;
4280
4281         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4282                 params.plink_action =
4283                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4284                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4285                         return -EINVAL;
4286         }
4287
4288         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4289                 params.plink_state =
4290                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4291                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4292                         return -EINVAL;
4293                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4294         }
4295
4296         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4297                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4298                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4299
4300                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4301                     pm > NL80211_MESH_POWER_MAX)
4302                         return -EINVAL;
4303
4304                 params.local_pm = pm;
4305         }
4306
4307         /* Include parameters for TDLS peer (will check later) */
4308         err = nl80211_set_station_tdls(info, &params);
4309         if (err)
4310                 return err;
4311
4312         params.vlan = get_vlan(info, rdev);
4313         if (IS_ERR(params.vlan))
4314                 return PTR_ERR(params.vlan);
4315
4316         switch (dev->ieee80211_ptr->iftype) {
4317         case NL80211_IFTYPE_AP:
4318         case NL80211_IFTYPE_AP_VLAN:
4319         case NL80211_IFTYPE_P2P_GO:
4320         case NL80211_IFTYPE_P2P_CLIENT:
4321         case NL80211_IFTYPE_STATION:
4322         case NL80211_IFTYPE_ADHOC:
4323         case NL80211_IFTYPE_MESH_POINT:
4324                 break;
4325         default:
4326                 err = -EOPNOTSUPP;
4327                 goto out_put_vlan;
4328         }
4329
4330         /* driver will call cfg80211_check_station_change() */
4331         err = rdev_change_station(rdev, dev, mac_addr, &params);
4332
4333  out_put_vlan:
4334         if (params.vlan)
4335                 dev_put(params.vlan);
4336
4337         return err;
4338 }
4339
4340 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4341 {
4342         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4343         int err;
4344         struct net_device *dev = info->user_ptr[1];
4345         struct station_parameters params;
4346         u8 *mac_addr = NULL;
4347
4348         memset(&params, 0, sizeof(params));
4349
4350         if (!rdev->ops->add_station)
4351                 return -EOPNOTSUPP;
4352
4353         if (!info->attrs[NL80211_ATTR_MAC])
4354                 return -EINVAL;
4355
4356         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4357                 return -EINVAL;
4358
4359         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4360                 return -EINVAL;
4361
4362         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4363             !info->attrs[NL80211_ATTR_PEER_AID])
4364                 return -EINVAL;
4365
4366         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4367         params.supported_rates =
4368                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4369         params.supported_rates_len =
4370                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4371         params.listen_interval =
4372                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4373
4374         if (info->attrs[NL80211_ATTR_PEER_AID])
4375                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4376         else
4377                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4378         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4379                 return -EINVAL;
4380
4381         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4382                 params.capability =
4383                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4384                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4385         }
4386
4387         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4388                 params.ext_capab =
4389                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4390                 params.ext_capab_len =
4391                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4392         }
4393
4394         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4395                 params.ht_capa =
4396                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4397
4398         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4399                 params.vht_capa =
4400                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4401
4402         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4403                 params.opmode_notif_used = true;
4404                 params.opmode_notif =
4405                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4406         }
4407
4408         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4409                 params.plink_action =
4410                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4411                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4412                         return -EINVAL;
4413         }
4414
4415         err = nl80211_parse_sta_channel_info(info, &params);
4416         if (err)
4417                 return err;
4418
4419         err = nl80211_parse_sta_wme(info, &params);
4420         if (err)
4421                 return err;
4422
4423         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4424                 return -EINVAL;
4425
4426         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4427          * as userspace might just pass through the capabilities from the IEs
4428          * directly, rather than enforcing this restriction and returning an
4429          * error in this case.
4430          */
4431         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4432                 params.ht_capa = NULL;
4433                 params.vht_capa = NULL;
4434         }
4435
4436         /* When you run into this, adjust the code below for the new flag */
4437         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4438
4439         switch (dev->ieee80211_ptr->iftype) {
4440         case NL80211_IFTYPE_AP:
4441         case NL80211_IFTYPE_AP_VLAN:
4442         case NL80211_IFTYPE_P2P_GO:
4443                 /* ignore WME attributes if iface/sta is not capable */
4444                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4445                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4446                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4447
4448                 /* TDLS peers cannot be added */
4449                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4450                     info->attrs[NL80211_ATTR_PEER_AID])
4451                         return -EINVAL;
4452                 /* but don't bother the driver with it */
4453                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4454
4455                 /* allow authenticated/associated only if driver handles it */
4456                 if (!(rdev->wiphy.features &
4457                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4458                     params.sta_flags_mask &
4459                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4460                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4461                         return -EINVAL;
4462
4463                 /* must be last in here for error handling */
4464                 params.vlan = get_vlan(info, rdev);
4465                 if (IS_ERR(params.vlan))
4466                         return PTR_ERR(params.vlan);
4467                 break;
4468         case NL80211_IFTYPE_MESH_POINT:
4469                 /* ignore uAPSD data */
4470                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4471
4472                 /* associated is disallowed */
4473                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4474                         return -EINVAL;
4475                 /* TDLS peers cannot be added */
4476                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4477                     info->attrs[NL80211_ATTR_PEER_AID])
4478                         return -EINVAL;
4479                 break;
4480         case NL80211_IFTYPE_STATION:
4481         case NL80211_IFTYPE_P2P_CLIENT:
4482                 /* ignore uAPSD data */
4483                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4484
4485                 /* these are disallowed */
4486                 if (params.sta_flags_mask &
4487                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4488                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4489                         return -EINVAL;
4490                 /* Only TDLS peers can be added */
4491                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4492                         return -EINVAL;
4493                 /* Can only add if TDLS ... */
4494                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4495                         return -EOPNOTSUPP;
4496                 /* ... with external setup is supported */
4497                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4498                         return -EOPNOTSUPP;
4499                 /*
4500                  * Older wpa_supplicant versions always mark the TDLS peer
4501                  * as authorized, but it shouldn't yet be.
4502                  */
4503                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4504                 break;
4505         default:
4506                 return -EOPNOTSUPP;
4507         }
4508
4509         /* be aware of params.vlan when changing code here */
4510
4511         err = rdev_add_station(rdev, dev, mac_addr, &params);
4512
4513         if (params.vlan)
4514                 dev_put(params.vlan);
4515         return err;
4516 }
4517
4518 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4519 {
4520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4521         struct net_device *dev = info->user_ptr[1];
4522         struct station_del_parameters params;
4523
4524         memset(&params, 0, sizeof(params));
4525
4526         if (info->attrs[NL80211_ATTR_MAC])
4527                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4528
4529         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4530             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4531             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4532             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4533                 return -EINVAL;
4534
4535         if (!rdev->ops->del_station)
4536                 return -EOPNOTSUPP;
4537
4538         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4539                 params.subtype =
4540                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4541                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4542                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4543                         return -EINVAL;
4544         } else {
4545                 /* Default to Deauthentication frame */
4546                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4547         }
4548
4549         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4550                 params.reason_code =
4551                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4552                 if (params.reason_code == 0)
4553                         return -EINVAL; /* 0 is reserved */
4554         } else {
4555                 /* Default to reason code 2 */
4556                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4557         }
4558
4559         return rdev_del_station(rdev, dev, &params);
4560 }
4561
4562 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4563                                 int flags, struct net_device *dev,
4564                                 u8 *dst, u8 *next_hop,
4565                                 struct mpath_info *pinfo)
4566 {
4567         void *hdr;
4568         struct nlattr *pinfoattr;
4569
4570         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4571         if (!hdr)
4572                 return -1;
4573
4574         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4575             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4576             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4577             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4578                 goto nla_put_failure;
4579
4580         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4581         if (!pinfoattr)
4582                 goto nla_put_failure;
4583         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4584             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4585                         pinfo->frame_qlen))
4586                 goto nla_put_failure;
4587         if (((pinfo->filled & MPATH_INFO_SN) &&
4588              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4589             ((pinfo->filled & MPATH_INFO_METRIC) &&
4590              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4591                          pinfo->metric)) ||
4592             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4593              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4594                          pinfo->exptime)) ||
4595             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4596              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4597                         pinfo->flags)) ||
4598             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4599              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4600                          pinfo->discovery_timeout)) ||
4601             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4602              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4603                         pinfo->discovery_retries)))
4604                 goto nla_put_failure;
4605
4606         nla_nest_end(msg, pinfoattr);
4607
4608         genlmsg_end(msg, hdr);
4609         return 0;
4610
4611  nla_put_failure:
4612         genlmsg_cancel(msg, hdr);
4613         return -EMSGSIZE;
4614 }
4615
4616 static int nl80211_dump_mpath(struct sk_buff *skb,
4617                               struct netlink_callback *cb)
4618 {
4619         struct mpath_info pinfo;
4620         struct cfg80211_registered_device *rdev;
4621         struct wireless_dev *wdev;
4622         u8 dst[ETH_ALEN];
4623         u8 next_hop[ETH_ALEN];
4624         int path_idx = cb->args[2];
4625         int err;
4626
4627         rtnl_lock();
4628         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4629         if (err)
4630                 goto out_err;
4631
4632         if (!rdev->ops->dump_mpath) {
4633                 err = -EOPNOTSUPP;
4634                 goto out_err;
4635         }
4636
4637         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4638                 err = -EOPNOTSUPP;
4639                 goto out_err;
4640         }
4641
4642         while (1) {
4643                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4644                                       next_hop, &pinfo);
4645                 if (err == -ENOENT)
4646                         break;
4647                 if (err)
4648                         goto out_err;
4649
4650                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4651                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4652                                        wdev->netdev, dst, next_hop,
4653                                        &pinfo) < 0)
4654                         goto out;
4655
4656                 path_idx++;
4657         }
4658
4659
4660  out:
4661         cb->args[2] = path_idx;
4662         err = skb->len;
4663  out_err:
4664         rtnl_unlock();
4665         return err;
4666 }
4667
4668 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4669 {
4670         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4671         int err;
4672         struct net_device *dev = info->user_ptr[1];
4673         struct mpath_info pinfo;
4674         struct sk_buff *msg;
4675         u8 *dst = NULL;
4676         u8 next_hop[ETH_ALEN];
4677
4678         memset(&pinfo, 0, sizeof(pinfo));
4679
4680         if (!info->attrs[NL80211_ATTR_MAC])
4681                 return -EINVAL;
4682
4683         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4684
4685         if (!rdev->ops->get_mpath)
4686                 return -EOPNOTSUPP;
4687
4688         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4689                 return -EOPNOTSUPP;
4690
4691         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4692         if (err)
4693                 return err;
4694
4695         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4696         if (!msg)
4697                 return -ENOMEM;
4698
4699         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4700                                  dev, dst, next_hop, &pinfo) < 0) {
4701                 nlmsg_free(msg);
4702                 return -ENOBUFS;
4703         }
4704
4705         return genlmsg_reply(msg, info);
4706 }
4707
4708 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4709 {
4710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4711         struct net_device *dev = info->user_ptr[1];
4712         u8 *dst = NULL;
4713         u8 *next_hop = NULL;
4714
4715         if (!info->attrs[NL80211_ATTR_MAC])
4716                 return -EINVAL;
4717
4718         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4719                 return -EINVAL;
4720
4721         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4722         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4723
4724         if (!rdev->ops->change_mpath)
4725                 return -EOPNOTSUPP;
4726
4727         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4728                 return -EOPNOTSUPP;
4729
4730         return rdev_change_mpath(rdev, dev, dst, next_hop);
4731 }
4732
4733 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4734 {
4735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4736         struct net_device *dev = info->user_ptr[1];
4737         u8 *dst = NULL;
4738         u8 *next_hop = NULL;
4739
4740         if (!info->attrs[NL80211_ATTR_MAC])
4741                 return -EINVAL;
4742
4743         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4744                 return -EINVAL;
4745
4746         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4747         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4748
4749         if (!rdev->ops->add_mpath)
4750                 return -EOPNOTSUPP;
4751
4752         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4753                 return -EOPNOTSUPP;
4754
4755         return rdev_add_mpath(rdev, dev, dst, next_hop);
4756 }
4757
4758 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4759 {
4760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4761         struct net_device *dev = info->user_ptr[1];
4762         u8 *dst = NULL;
4763
4764         if (info->attrs[NL80211_ATTR_MAC])
4765                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4766
4767         if (!rdev->ops->del_mpath)
4768                 return -EOPNOTSUPP;
4769
4770         return rdev_del_mpath(rdev, dev, dst);
4771 }
4772
4773 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4774 {
4775         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4776         int err;
4777         struct net_device *dev = info->user_ptr[1];
4778         struct mpath_info pinfo;
4779         struct sk_buff *msg;
4780         u8 *dst = NULL;
4781         u8 mpp[ETH_ALEN];
4782
4783         memset(&pinfo, 0, sizeof(pinfo));
4784
4785         if (!info->attrs[NL80211_ATTR_MAC])
4786                 return -EINVAL;
4787
4788         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4789
4790         if (!rdev->ops->get_mpp)
4791                 return -EOPNOTSUPP;
4792
4793         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4794                 return -EOPNOTSUPP;
4795
4796         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4797         if (err)
4798                 return err;
4799
4800         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4801         if (!msg)
4802                 return -ENOMEM;
4803
4804         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4805                                dev, dst, mpp, &pinfo) < 0) {
4806                 nlmsg_free(msg);
4807                 return -ENOBUFS;
4808         }
4809
4810         return genlmsg_reply(msg, info);
4811 }
4812
4813 static int nl80211_dump_mpp(struct sk_buff *skb,
4814                             struct netlink_callback *cb)
4815 {
4816         struct mpath_info pinfo;
4817         struct cfg80211_registered_device *rdev;
4818         struct wireless_dev *wdev;
4819         u8 dst[ETH_ALEN];
4820         u8 mpp[ETH_ALEN];
4821         int path_idx = cb->args[2];
4822         int err;
4823
4824         rtnl_lock();
4825         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4826         if (err)
4827                 goto out_err;
4828
4829         if (!rdev->ops->dump_mpp) {
4830                 err = -EOPNOTSUPP;
4831                 goto out_err;
4832         }
4833
4834         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4835                 err = -EOPNOTSUPP;
4836                 goto out_err;
4837         }
4838
4839         while (1) {
4840                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4841                                     mpp, &pinfo);
4842                 if (err == -ENOENT)
4843                         break;
4844                 if (err)
4845                         goto out_err;
4846
4847                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4848                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4849                                        wdev->netdev, dst, mpp,
4850                                        &pinfo) < 0)
4851                         goto out;
4852
4853                 path_idx++;
4854         }
4855
4856  out:
4857         cb->args[2] = path_idx;
4858         err = skb->len;
4859  out_err:
4860         rtnl_unlock();
4861         return err;
4862 }
4863
4864 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4865 {
4866         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4867         struct net_device *dev = info->user_ptr[1];
4868         struct wireless_dev *wdev = dev->ieee80211_ptr;
4869         struct bss_parameters params;
4870         int err;
4871
4872         memset(&params, 0, sizeof(params));
4873         /* default to not changing parameters */
4874         params.use_cts_prot = -1;
4875         params.use_short_preamble = -1;
4876         params.use_short_slot_time = -1;
4877         params.ap_isolate = -1;
4878         params.ht_opmode = -1;
4879         params.p2p_ctwindow = -1;
4880         params.p2p_opp_ps = -1;
4881
4882         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4883                 params.use_cts_prot =
4884                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4885         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4886                 params.use_short_preamble =
4887                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4888         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4889                 params.use_short_slot_time =
4890                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4891         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4892                 params.basic_rates =
4893                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4894                 params.basic_rates_len =
4895                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4896         }
4897         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4898                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4899         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4900                 params.ht_opmode =
4901                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4902
4903         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4904                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4905                         return -EINVAL;
4906                 params.p2p_ctwindow =
4907                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4908                 if (params.p2p_ctwindow < 0)
4909                         return -EINVAL;
4910                 if (params.p2p_ctwindow != 0 &&
4911                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4912                         return -EINVAL;
4913         }
4914
4915         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4916                 u8 tmp;
4917
4918                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4919                         return -EINVAL;
4920                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4921                 if (tmp > 1)
4922                         return -EINVAL;
4923                 params.p2p_opp_ps = tmp;
4924                 if (params.p2p_opp_ps &&
4925                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4926                         return -EINVAL;
4927         }
4928
4929         if (!rdev->ops->change_bss)
4930                 return -EOPNOTSUPP;
4931
4932         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4933             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4934                 return -EOPNOTSUPP;
4935
4936         wdev_lock(wdev);
4937         err = rdev_change_bss(rdev, dev, &params);
4938         wdev_unlock(wdev);
4939
4940         return err;
4941 }
4942
4943 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4944 {
4945         char *data = NULL;
4946         bool is_indoor;
4947         enum nl80211_user_reg_hint_type user_reg_hint_type;
4948         u32 owner_nlportid;
4949
4950
4951         /*
4952          * You should only get this when cfg80211 hasn't yet initialized
4953          * completely when built-in to the kernel right between the time
4954          * window between nl80211_init() and regulatory_init(), if that is
4955          * even possible.
4956          */
4957         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4958                 return -EINPROGRESS;
4959
4960         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4961                 user_reg_hint_type =
4962                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4963         else
4964                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4965
4966         switch (user_reg_hint_type) {
4967         case NL80211_USER_REG_HINT_USER:
4968         case NL80211_USER_REG_HINT_CELL_BASE:
4969                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4970                         return -EINVAL;
4971
4972                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4973                 return regulatory_hint_user(data, user_reg_hint_type);
4974         case NL80211_USER_REG_HINT_INDOOR:
4975                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
4976                         owner_nlportid = info->snd_portid;
4977                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
4978                 } else {
4979                         owner_nlportid = 0;
4980                         is_indoor = true;
4981                 }
4982
4983                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
4984         default:
4985                 return -EINVAL;
4986         }
4987 }
4988
4989 static int nl80211_get_mesh_config(struct sk_buff *skb,
4990                                    struct genl_info *info)
4991 {
4992         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4993         struct net_device *dev = info->user_ptr[1];
4994         struct wireless_dev *wdev = dev->ieee80211_ptr;
4995         struct mesh_config cur_params;
4996         int err = 0;
4997         void *hdr;
4998         struct nlattr *pinfoattr;
4999         struct sk_buff *msg;
5000
5001         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5002                 return -EOPNOTSUPP;
5003
5004         if (!rdev->ops->get_mesh_config)
5005                 return -EOPNOTSUPP;
5006
5007         wdev_lock(wdev);
5008         /* If not connected, get default parameters */
5009         if (!wdev->mesh_id_len)
5010                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5011         else
5012                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5013         wdev_unlock(wdev);
5014
5015         if (err)
5016                 return err;
5017
5018         /* Draw up a netlink message to send back */
5019         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5020         if (!msg)
5021                 return -ENOMEM;
5022         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5023                              NL80211_CMD_GET_MESH_CONFIG);
5024         if (!hdr)
5025                 goto out;
5026         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5027         if (!pinfoattr)
5028                 goto nla_put_failure;
5029         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5030             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5031                         cur_params.dot11MeshRetryTimeout) ||
5032             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5033                         cur_params.dot11MeshConfirmTimeout) ||
5034             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5035                         cur_params.dot11MeshHoldingTimeout) ||
5036             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5037                         cur_params.dot11MeshMaxPeerLinks) ||
5038             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5039                        cur_params.dot11MeshMaxRetries) ||
5040             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5041                        cur_params.dot11MeshTTL) ||
5042             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5043                        cur_params.element_ttl) ||
5044             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5045                        cur_params.auto_open_plinks) ||
5046             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5047                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5048             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5049                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5050             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5051                         cur_params.path_refresh_time) ||
5052             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5053                         cur_params.min_discovery_timeout) ||
5054             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5055                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5056             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5057                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5058             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5059                         cur_params.dot11MeshHWMPperrMinInterval) ||
5060             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5061                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5062             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5063                        cur_params.dot11MeshHWMPRootMode) ||
5064             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5065                         cur_params.dot11MeshHWMPRannInterval) ||
5066             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5067                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5068             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5069                        cur_params.dot11MeshForwarding) ||
5070             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5071                         cur_params.rssi_threshold) ||
5072             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5073                         cur_params.ht_opmode) ||
5074             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5075                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5076             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5077                         cur_params.dot11MeshHWMProotInterval) ||
5078             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5079                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5080             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5081                         cur_params.power_mode) ||
5082             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5083                         cur_params.dot11MeshAwakeWindowDuration) ||
5084             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5085                         cur_params.plink_timeout))
5086                 goto nla_put_failure;
5087         nla_nest_end(msg, pinfoattr);
5088         genlmsg_end(msg, hdr);
5089         return genlmsg_reply(msg, info);
5090
5091  nla_put_failure:
5092         genlmsg_cancel(msg, hdr);
5093  out:
5094         nlmsg_free(msg);
5095         return -ENOBUFS;
5096 }
5097
5098 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5099         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5100         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5101         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5102         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5103         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5104         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5105         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5106         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5107         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5108         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5109         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5110         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5111         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5112         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5113         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5114         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5115         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5116         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5117         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5118         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5119         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5120         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5121         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5122         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5123         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5124         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5125         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5126         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5127 };
5128
5129 static const struct nla_policy
5130         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5131         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5132         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5133         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5134         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5135         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5136         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5137         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5138                                     .len = IEEE80211_MAX_DATA_LEN },
5139         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5140 };
5141
5142 static int nl80211_parse_mesh_config(struct genl_info *info,
5143                                      struct mesh_config *cfg,
5144                                      u32 *mask_out)
5145 {
5146         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5147         u32 mask = 0;
5148
5149 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5150 do {                                                                        \
5151         if (tb[attr]) {                                                     \
5152                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5153                         return -EINVAL;                                     \
5154                 cfg->param = fn(tb[attr]);                                  \
5155                 mask |= (1 << (attr - 1));                                  \
5156         }                                                                   \
5157 } while (0)
5158
5159
5160         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5161                 return -EINVAL;
5162         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5163                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5164                              nl80211_meshconf_params_policy))
5165                 return -EINVAL;
5166
5167         /* This makes sure that there aren't more than 32 mesh config
5168          * parameters (otherwise our bitfield scheme would not work.) */
5169         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5170
5171         /* Fill in the params struct */
5172         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5173                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5174                                   nla_get_u16);
5175         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5176                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5177                                   nla_get_u16);
5178         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5179                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5180                                   nla_get_u16);
5181         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5182                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5183                                   nla_get_u16);
5184         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5185                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5186                                   nla_get_u8);
5187         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5188                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5189         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5190                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5191                                   nla_get_u8);
5192         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5193                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5194                                   nla_get_u8);
5195         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5196                                   1, 255, mask,
5197                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5198                                   nla_get_u32);
5199         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5200                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5201                                   nla_get_u8);
5202         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5203                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5204                                   nla_get_u32);
5205         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5206                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5207                                   nla_get_u16);
5208         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5209                                   1, 65535, mask,
5210                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5211                                   nla_get_u32);
5212         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5213                                   1, 65535, mask,
5214                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5215                                   nla_get_u16);
5216         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5217                                   1, 65535, mask,
5218                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5219                                   nla_get_u16);
5220         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5221                                   dot11MeshHWMPnetDiameterTraversalTime,
5222                                   1, 65535, mask,
5223                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5224                                   nla_get_u16);
5225         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5226                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5227                                   nla_get_u8);
5228         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5229                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5230                                   nla_get_u16);
5231         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5232                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5233                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5234                                   nla_get_u8);
5235         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5236                                   mask, NL80211_MESHCONF_FORWARDING,
5237                                   nla_get_u8);
5238         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5239                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5240                                   nla_get_s32);
5241         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5242                                   mask, NL80211_MESHCONF_HT_OPMODE,
5243                                   nla_get_u16);
5244         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5245                                   1, 65535, mask,
5246                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5247                                   nla_get_u32);
5248         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5249                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5250                                   nla_get_u16);
5251         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5252                                   dot11MeshHWMPconfirmationInterval,
5253                                   1, 65535, mask,
5254                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5255                                   nla_get_u16);
5256         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5257                                   NL80211_MESH_POWER_ACTIVE,
5258                                   NL80211_MESH_POWER_MAX,
5259                                   mask, NL80211_MESHCONF_POWER_MODE,
5260                                   nla_get_u32);
5261         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5262                                   0, 65535, mask,
5263                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5264         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5265                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5266                                   nla_get_u32);
5267         if (mask_out)
5268                 *mask_out = mask;
5269
5270         return 0;
5271
5272 #undef FILL_IN_MESH_PARAM_IF_SET
5273 }
5274
5275 static int nl80211_parse_mesh_setup(struct genl_info *info,
5276                                      struct mesh_setup *setup)
5277 {
5278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5279         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5280
5281         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5282                 return -EINVAL;
5283         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5284                              info->attrs[NL80211_ATTR_MESH_SETUP],
5285                              nl80211_mesh_setup_params_policy))
5286                 return -EINVAL;
5287
5288         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5289                 setup->sync_method =
5290                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5291                  IEEE80211_SYNC_METHOD_VENDOR :
5292                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5293
5294         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5295                 setup->path_sel_proto =
5296                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5297                  IEEE80211_PATH_PROTOCOL_VENDOR :
5298                  IEEE80211_PATH_PROTOCOL_HWMP;
5299
5300         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5301                 setup->path_metric =
5302                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5303                  IEEE80211_PATH_METRIC_VENDOR :
5304                  IEEE80211_PATH_METRIC_AIRTIME;
5305
5306
5307         if (tb[NL80211_MESH_SETUP_IE]) {
5308                 struct nlattr *ieattr =
5309                         tb[NL80211_MESH_SETUP_IE];
5310                 if (!is_valid_ie_attr(ieattr))
5311                         return -EINVAL;
5312                 setup->ie = nla_data(ieattr);
5313                 setup->ie_len = nla_len(ieattr);
5314         }
5315         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5316             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5317                 return -EINVAL;
5318         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5319         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5320         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5321         if (setup->is_secure)
5322                 setup->user_mpm = true;
5323
5324         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5325                 if (!setup->user_mpm)
5326                         return -EINVAL;
5327                 setup->auth_id =
5328                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5329         }
5330
5331         return 0;
5332 }
5333
5334 static int nl80211_update_mesh_config(struct sk_buff *skb,
5335                                       struct genl_info *info)
5336 {
5337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5338         struct net_device *dev = info->user_ptr[1];
5339         struct wireless_dev *wdev = dev->ieee80211_ptr;
5340         struct mesh_config cfg;
5341         u32 mask;
5342         int err;
5343
5344         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5345                 return -EOPNOTSUPP;
5346
5347         if (!rdev->ops->update_mesh_config)
5348                 return -EOPNOTSUPP;
5349
5350         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5351         if (err)
5352                 return err;
5353
5354         wdev_lock(wdev);
5355         if (!wdev->mesh_id_len)
5356                 err = -ENOLINK;
5357
5358         if (!err)
5359                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5360
5361         wdev_unlock(wdev);
5362
5363         return err;
5364 }
5365
5366 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5367                               struct sk_buff *msg)
5368 {
5369         struct nlattr *nl_reg_rules;
5370         unsigned int i;
5371
5372         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5373             (regdom->dfs_region &&
5374              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5375                 goto nla_put_failure;
5376
5377         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5378         if (!nl_reg_rules)
5379                 goto nla_put_failure;
5380
5381         for (i = 0; i < regdom->n_reg_rules; i++) {
5382                 struct nlattr *nl_reg_rule;
5383                 const struct ieee80211_reg_rule *reg_rule;
5384                 const struct ieee80211_freq_range *freq_range;
5385                 const struct ieee80211_power_rule *power_rule;
5386                 unsigned int max_bandwidth_khz;
5387
5388                 reg_rule = &regdom->reg_rules[i];
5389                 freq_range = &reg_rule->freq_range;
5390                 power_rule = &reg_rule->power_rule;
5391
5392                 nl_reg_rule = nla_nest_start(msg, i);
5393                 if (!nl_reg_rule)
5394                         goto nla_put_failure;
5395
5396                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5397                 if (!max_bandwidth_khz)
5398                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5399                                                                   reg_rule);
5400
5401                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5402                                 reg_rule->flags) ||
5403                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5404                                 freq_range->start_freq_khz) ||
5405                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5406                                 freq_range->end_freq_khz) ||
5407                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5408                                 max_bandwidth_khz) ||
5409                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5410                                 power_rule->max_antenna_gain) ||
5411                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5412                                 power_rule->max_eirp) ||
5413                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5414                                 reg_rule->dfs_cac_ms))
5415                         goto nla_put_failure;
5416
5417                 nla_nest_end(msg, nl_reg_rule);
5418         }
5419
5420         nla_nest_end(msg, nl_reg_rules);
5421         return 0;
5422
5423 nla_put_failure:
5424         return -EMSGSIZE;
5425 }
5426
5427 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5428 {
5429         const struct ieee80211_regdomain *regdom = NULL;
5430         struct cfg80211_registered_device *rdev;
5431         struct wiphy *wiphy = NULL;
5432         struct sk_buff *msg;
5433         void *hdr;
5434
5435         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5436         if (!msg)
5437                 return -ENOBUFS;
5438
5439         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5440                              NL80211_CMD_GET_REG);
5441         if (!hdr)
5442                 goto put_failure;
5443
5444         if (info->attrs[NL80211_ATTR_WIPHY]) {
5445                 bool self_managed;
5446
5447                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5448                 if (IS_ERR(rdev)) {
5449                         nlmsg_free(msg);
5450                         return PTR_ERR(rdev);
5451                 }
5452
5453                 wiphy = &rdev->wiphy;
5454                 self_managed = wiphy->regulatory_flags &
5455                                REGULATORY_WIPHY_SELF_MANAGED;
5456                 regdom = get_wiphy_regdom(wiphy);
5457
5458                 /* a self-managed-reg device must have a private regdom */
5459                 if (WARN_ON(!regdom && self_managed)) {
5460                         nlmsg_free(msg);
5461                         return -EINVAL;
5462                 }
5463
5464                 if (regdom &&
5465                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5466                         goto nla_put_failure;
5467         }
5468
5469         if (!wiphy && reg_last_request_cell_base() &&
5470             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5471                         NL80211_USER_REG_HINT_CELL_BASE))
5472                 goto nla_put_failure;
5473
5474         rcu_read_lock();
5475
5476         if (!regdom)
5477                 regdom = rcu_dereference(cfg80211_regdomain);
5478
5479         if (nl80211_put_regdom(regdom, msg))
5480                 goto nla_put_failure_rcu;
5481
5482         rcu_read_unlock();
5483
5484         genlmsg_end(msg, hdr);
5485         return genlmsg_reply(msg, info);
5486
5487 nla_put_failure_rcu:
5488         rcu_read_unlock();
5489 nla_put_failure:
5490         genlmsg_cancel(msg, hdr);
5491 put_failure:
5492         nlmsg_free(msg);
5493         return -EMSGSIZE;
5494 }
5495
5496 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5497                                u32 seq, int flags, struct wiphy *wiphy,
5498                                const struct ieee80211_regdomain *regdom)
5499 {
5500         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5501                                    NL80211_CMD_GET_REG);
5502
5503         if (!hdr)
5504                 return -1;
5505
5506         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5507
5508         if (nl80211_put_regdom(regdom, msg))
5509                 goto nla_put_failure;
5510
5511         if (!wiphy && reg_last_request_cell_base() &&
5512             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5513                         NL80211_USER_REG_HINT_CELL_BASE))
5514                 goto nla_put_failure;
5515
5516         if (wiphy &&
5517             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5518                 goto nla_put_failure;
5519
5520         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5521             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5522                 goto nla_put_failure;
5523
5524         genlmsg_end(msg, hdr);
5525         return 0;
5526
5527 nla_put_failure:
5528         genlmsg_cancel(msg, hdr);
5529         return -EMSGSIZE;
5530 }
5531
5532 static int nl80211_get_reg_dump(struct sk_buff *skb,
5533                                 struct netlink_callback *cb)
5534 {
5535         const struct ieee80211_regdomain *regdom = NULL;
5536         struct cfg80211_registered_device *rdev;
5537         int err, reg_idx, start = cb->args[2];
5538
5539         rtnl_lock();
5540
5541         if (cfg80211_regdomain && start == 0) {
5542                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5543                                           NLM_F_MULTI, NULL,
5544                                           rtnl_dereference(cfg80211_regdomain));
5545                 if (err < 0)
5546                         goto out_err;
5547         }
5548
5549         /* the global regdom is idx 0 */
5550         reg_idx = 1;
5551         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5552                 regdom = get_wiphy_regdom(&rdev->wiphy);
5553                 if (!regdom)
5554                         continue;
5555
5556                 if (++reg_idx <= start)
5557                         continue;
5558
5559                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5560                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5561                 if (err < 0) {
5562                         reg_idx--;
5563                         break;
5564                 }
5565         }
5566
5567         cb->args[2] = reg_idx;
5568         err = skb->len;
5569 out_err:
5570         rtnl_unlock();
5571         return err;
5572 }
5573
5574 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5575 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5576         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5577         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5578         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5579         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5580         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5581         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5582         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5583 };
5584
5585 static int parse_reg_rule(struct nlattr *tb[],
5586         struct ieee80211_reg_rule *reg_rule)
5587 {
5588         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5589         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5590
5591         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5592                 return -EINVAL;
5593         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5594                 return -EINVAL;
5595         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5596                 return -EINVAL;
5597         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5598                 return -EINVAL;
5599         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5600                 return -EINVAL;
5601
5602         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5603
5604         freq_range->start_freq_khz =
5605                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5606         freq_range->end_freq_khz =
5607                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5608         freq_range->max_bandwidth_khz =
5609                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5610
5611         power_rule->max_eirp =
5612                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5613
5614         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5615                 power_rule->max_antenna_gain =
5616                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5617
5618         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5619                 reg_rule->dfs_cac_ms =
5620                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5621
5622         return 0;
5623 }
5624
5625 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5626 {
5627         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5628         struct nlattr *nl_reg_rule;
5629         char *alpha2;
5630         int rem_reg_rules, r;
5631         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5632         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5633         struct ieee80211_regdomain *rd;
5634
5635         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5636                 return -EINVAL;
5637
5638         if (!info->attrs[NL80211_ATTR_REG_RULES])
5639                 return -EINVAL;
5640
5641         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5642
5643         if (info->attrs[NL80211_ATTR_DFS_REGION])
5644                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5645
5646         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5647                             rem_reg_rules) {
5648                 num_rules++;
5649                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5650                         return -EINVAL;
5651         }
5652
5653         if (!reg_is_valid_request(alpha2))
5654                 return -EINVAL;
5655
5656         size_of_regd = sizeof(struct ieee80211_regdomain) +
5657                        num_rules * sizeof(struct ieee80211_reg_rule);
5658
5659         rd = kzalloc(size_of_regd, GFP_KERNEL);
5660         if (!rd)
5661                 return -ENOMEM;
5662
5663         rd->n_reg_rules = num_rules;
5664         rd->alpha2[0] = alpha2[0];
5665         rd->alpha2[1] = alpha2[1];
5666
5667         /*
5668          * Disable DFS master mode if the DFS region was
5669          * not supported or known on this kernel.
5670          */
5671         if (reg_supported_dfs_region(dfs_region))
5672                 rd->dfs_region = dfs_region;
5673
5674         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5675                             rem_reg_rules) {
5676                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5677                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5678                               reg_rule_policy);
5679                 if (r)
5680                         goto bad_reg;
5681                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5682                 if (r)
5683                         goto bad_reg;
5684
5685                 rule_idx++;
5686
5687                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5688                         r = -EINVAL;
5689                         goto bad_reg;
5690                 }
5691         }
5692
5693         r = set_regdom(rd, REGD_SOURCE_CRDA);
5694         /* set_regdom took ownership */
5695         rd = NULL;
5696
5697  bad_reg:
5698         kfree(rd);
5699         return r;
5700 }
5701 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5702
5703 static int validate_scan_freqs(struct nlattr *freqs)
5704 {
5705         struct nlattr *attr1, *attr2;
5706         int n_channels = 0, tmp1, tmp2;
5707
5708         nla_for_each_nested(attr1, freqs, tmp1) {
5709                 n_channels++;
5710                 /*
5711                  * Some hardware has a limited channel list for
5712                  * scanning, and it is pretty much nonsensical
5713                  * to scan for a channel twice, so disallow that
5714                  * and don't require drivers to check that the
5715                  * channel list they get isn't longer than what
5716                  * they can scan, as long as they can scan all
5717                  * the channels they registered at once.
5718                  */
5719                 nla_for_each_nested(attr2, freqs, tmp2)
5720                         if (attr1 != attr2 &&
5721                             nla_get_u32(attr1) == nla_get_u32(attr2))
5722                                 return 0;
5723         }
5724
5725         return n_channels;
5726 }
5727
5728 static int nl80211_parse_random_mac(struct nlattr **attrs,
5729                                     u8 *mac_addr, u8 *mac_addr_mask)
5730 {
5731         int i;
5732
5733         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5734                 eth_zero_addr(mac_addr);
5735                 eth_zero_addr(mac_addr_mask);
5736                 mac_addr[0] = 0x2;
5737                 mac_addr_mask[0] = 0x3;
5738
5739                 return 0;
5740         }
5741
5742         /* need both or none */
5743         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5744                 return -EINVAL;
5745
5746         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5747         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5748
5749         /* don't allow or configure an mcast address */
5750         if (!is_multicast_ether_addr(mac_addr_mask) ||
5751             is_multicast_ether_addr(mac_addr))
5752                 return -EINVAL;
5753
5754         /*
5755          * allow users to pass a MAC address that has bits set outside
5756          * of the mask, but don't bother drivers with having to deal
5757          * with such bits
5758          */
5759         for (i = 0; i < ETH_ALEN; i++)
5760                 mac_addr[i] &= mac_addr_mask[i];
5761
5762         return 0;
5763 }
5764
5765 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5766 {
5767         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5768         struct wireless_dev *wdev = info->user_ptr[1];
5769         struct cfg80211_scan_request *request;
5770         struct nlattr *attr;
5771         struct wiphy *wiphy;
5772         int err, tmp, n_ssids = 0, n_channels, i;
5773         size_t ie_len;
5774
5775         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5776                 return -EINVAL;
5777
5778         wiphy = &rdev->wiphy;
5779
5780         if (!rdev->ops->scan)
5781                 return -EOPNOTSUPP;
5782
5783         if (rdev->scan_req || rdev->scan_msg) {
5784                 err = -EBUSY;
5785                 goto unlock;
5786         }
5787
5788         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5789                 n_channels = validate_scan_freqs(
5790                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5791                 if (!n_channels) {
5792                         err = -EINVAL;
5793                         goto unlock;
5794                 }
5795         } else {
5796                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5797         }
5798
5799         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5800                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5801                         n_ssids++;
5802
5803         if (n_ssids > wiphy->max_scan_ssids) {
5804                 err = -EINVAL;
5805                 goto unlock;
5806         }
5807
5808         if (info->attrs[NL80211_ATTR_IE])
5809                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5810         else
5811                 ie_len = 0;
5812
5813         if (ie_len > wiphy->max_scan_ie_len) {
5814                 err = -EINVAL;
5815                 goto unlock;
5816         }
5817
5818         request = kzalloc(sizeof(*request)
5819                         + sizeof(*request->ssids) * n_ssids
5820                         + sizeof(*request->channels) * n_channels
5821                         + ie_len, GFP_KERNEL);
5822         if (!request) {
5823                 err = -ENOMEM;
5824                 goto unlock;
5825         }
5826
5827         if (n_ssids)
5828                 request->ssids = (void *)&request->channels[n_channels];
5829         request->n_ssids = n_ssids;
5830         if (ie_len) {
5831                 if (n_ssids)
5832                         request->ie = (void *)(request->ssids + n_ssids);
5833                 else
5834                         request->ie = (void *)(request->channels + n_channels);
5835         }
5836
5837         i = 0;
5838         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5839                 /* user specified, bail out if channel not found */
5840                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5841                         struct ieee80211_channel *chan;
5842
5843                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5844
5845                         if (!chan) {
5846                                 err = -EINVAL;
5847                                 goto out_free;
5848                         }
5849
5850                         /* ignore disabled channels */
5851                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5852                                 continue;
5853
5854                         request->channels[i] = chan;
5855                         i++;
5856                 }
5857         } else {
5858                 enum ieee80211_band band;
5859
5860                 /* all channels */
5861                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5862                         int j;
5863                         if (!wiphy->bands[band])
5864                                 continue;
5865                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5866                                 struct ieee80211_channel *chan;
5867
5868                                 chan = &wiphy->bands[band]->channels[j];
5869
5870                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5871                                         continue;
5872
5873                                 request->channels[i] = chan;
5874                                 i++;
5875                         }
5876                 }
5877         }
5878
5879         if (!i) {
5880                 err = -EINVAL;
5881                 goto out_free;
5882         }
5883
5884         request->n_channels = i;
5885
5886         i = 0;
5887         if (n_ssids) {
5888                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5889                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5890                                 err = -EINVAL;
5891                                 goto out_free;
5892                         }
5893                         request->ssids[i].ssid_len = nla_len(attr);
5894                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5895                         i++;
5896                 }
5897         }
5898
5899         if (info->attrs[NL80211_ATTR_IE]) {
5900                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5901                 memcpy((void *)request->ie,
5902                        nla_data(info->attrs[NL80211_ATTR_IE]),
5903                        request->ie_len);
5904         }
5905
5906         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5907                 if (wiphy->bands[i])
5908                         request->rates[i] =
5909                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5910
5911         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5912                 nla_for_each_nested(attr,
5913                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5914                                     tmp) {
5915                         enum ieee80211_band band = nla_type(attr);
5916
5917                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5918                                 err = -EINVAL;
5919                                 goto out_free;
5920                         }
5921
5922                         if (!wiphy->bands[band])
5923                                 continue;
5924
5925                         err = ieee80211_get_ratemask(wiphy->bands[band],
5926                                                      nla_data(attr),
5927                                                      nla_len(attr),
5928                                                      &request->rates[band]);
5929                         if (err)
5930                                 goto out_free;
5931                 }
5932         }
5933
5934         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5935                 request->flags = nla_get_u32(
5936                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5937                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5938                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5939                         err = -EOPNOTSUPP;
5940                         goto out_free;
5941                 }
5942
5943                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
5944                         if (!(wiphy->features &
5945                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
5946                                 err = -EOPNOTSUPP;
5947                                 goto out_free;
5948                         }
5949
5950                         if (wdev->current_bss) {
5951                                 err = -EOPNOTSUPP;
5952                                 goto out_free;
5953                         }
5954
5955                         err = nl80211_parse_random_mac(info->attrs,
5956                                                        request->mac_addr,
5957                                                        request->mac_addr_mask);
5958                         if (err)
5959                                 goto out_free;
5960                 }
5961         }
5962
5963         request->no_cck =
5964                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5965
5966         request->wdev = wdev;
5967         request->wiphy = &rdev->wiphy;
5968         request->scan_start = jiffies;
5969
5970         rdev->scan_req = request;
5971         err = rdev_scan(rdev, request);
5972
5973         if (!err) {
5974                 nl80211_send_scan_start(rdev, wdev);
5975                 if (wdev->netdev)
5976                         dev_hold(wdev->netdev);
5977         } else {
5978  out_free:
5979                 rdev->scan_req = NULL;
5980                 kfree(request);
5981         }
5982
5983  unlock:
5984         return err;
5985 }
5986
5987 static int
5988 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
5989                                struct cfg80211_sched_scan_request *request,
5990                                struct nlattr **attrs)
5991 {
5992         int tmp, err, i = 0;
5993         struct nlattr *attr;
5994
5995         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
5996                 u32 interval;
5997
5998                 /*
5999                  * If scan plans are not specified,
6000                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6001                  * case one scan plan will be set with the specified scan
6002                  * interval and infinite number of iterations.
6003                  */
6004                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6005                         return -EINVAL;
6006
6007                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6008                 if (!interval)
6009                         return -EINVAL;
6010
6011                 request->scan_plans[0].interval =
6012                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6013                 if (!request->scan_plans[0].interval)
6014                         return -EINVAL;
6015
6016                 if (request->scan_plans[0].interval >
6017                     wiphy->max_sched_scan_plan_interval)
6018                         request->scan_plans[0].interval =
6019                                 wiphy->max_sched_scan_plan_interval;
6020
6021                 return 0;
6022         }
6023
6024         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6025                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6026
6027                 if (WARN_ON(i >= n_plans))
6028                         return -EINVAL;
6029
6030                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6031                                 nla_data(attr), nla_len(attr),
6032                                 nl80211_plan_policy);
6033                 if (err)
6034                         return err;
6035
6036                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6037                         return -EINVAL;
6038
6039                 request->scan_plans[i].interval =
6040                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6041                 if (!request->scan_plans[i].interval ||
6042                     request->scan_plans[i].interval >
6043                     wiphy->max_sched_scan_plan_interval)
6044                         return -EINVAL;
6045
6046                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6047                         request->scan_plans[i].iterations =
6048                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6049                         if (!request->scan_plans[i].iterations ||
6050                             (request->scan_plans[i].iterations >
6051                              wiphy->max_sched_scan_plan_iterations))
6052                                 return -EINVAL;
6053                 } else if (i < n_plans - 1) {
6054                         /*
6055                          * All scan plans but the last one must specify
6056                          * a finite number of iterations
6057                          */
6058                         return -EINVAL;
6059                 }
6060
6061                 i++;
6062         }
6063
6064         /*
6065          * The last scan plan must not specify the number of
6066          * iterations, it is supposed to run infinitely
6067          */
6068         if (request->scan_plans[n_plans - 1].iterations)
6069                 return  -EINVAL;
6070
6071         return 0;
6072 }
6073
6074 static struct cfg80211_sched_scan_request *
6075 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6076                          struct nlattr **attrs)
6077 {
6078         struct cfg80211_sched_scan_request *request;
6079         struct nlattr *attr;
6080         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6081         enum ieee80211_band band;
6082         size_t ie_len;
6083         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6084         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6085
6086         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6087                 return ERR_PTR(-EINVAL);
6088
6089         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6090                 n_channels = validate_scan_freqs(
6091                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6092                 if (!n_channels)
6093                         return ERR_PTR(-EINVAL);
6094         } else {
6095                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6096         }
6097
6098         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6099                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6100                                     tmp)
6101                         n_ssids++;
6102
6103         if (n_ssids > wiphy->max_sched_scan_ssids)
6104                 return ERR_PTR(-EINVAL);
6105
6106         /*
6107          * First, count the number of 'real' matchsets. Due to an issue with
6108          * the old implementation, matchsets containing only the RSSI attribute
6109          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6110          * RSSI for all matchsets, rather than their own matchset for reporting
6111          * all APs with a strong RSSI. This is needed to be compatible with
6112          * older userspace that treated a matchset with only the RSSI as the
6113          * global RSSI for all other matchsets - if there are other matchsets.
6114          */
6115         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6116                 nla_for_each_nested(attr,
6117                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6118                                     tmp) {
6119                         struct nlattr *rssi;
6120
6121                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6122                                         nla_data(attr), nla_len(attr),
6123                                         nl80211_match_policy);
6124                         if (err)
6125                                 return ERR_PTR(err);
6126                         /* add other standalone attributes here */
6127                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6128                                 n_match_sets++;
6129                                 continue;
6130                         }
6131                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6132                         if (rssi)
6133                                 default_match_rssi = nla_get_s32(rssi);
6134                 }
6135         }
6136
6137         /* However, if there's no other matchset, add the RSSI one */
6138         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6139                 n_match_sets = 1;
6140
6141         if (n_match_sets > wiphy->max_match_sets)
6142                 return ERR_PTR(-EINVAL);
6143
6144         if (attrs[NL80211_ATTR_IE])
6145                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6146         else
6147                 ie_len = 0;
6148
6149         if (ie_len > wiphy->max_sched_scan_ie_len)
6150                 return ERR_PTR(-EINVAL);
6151
6152         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6153                 /*
6154                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6155                  * each scan plan already specifies its own interval
6156                  */
6157                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6158                         return ERR_PTR(-EINVAL);
6159
6160                 nla_for_each_nested(attr,
6161                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6162                         n_plans++;
6163         } else {
6164                 /*
6165                  * The scan interval attribute is kept for backward
6166                  * compatibility. If no scan plans are specified and sched scan
6167                  * interval is specified, one scan plan will be set with this
6168                  * scan interval and infinite number of iterations.
6169                  */
6170                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6171                         return ERR_PTR(-EINVAL);
6172
6173                 n_plans = 1;
6174         }
6175
6176         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6177                 return ERR_PTR(-EINVAL);
6178
6179         request = kzalloc(sizeof(*request)
6180                         + sizeof(*request->ssids) * n_ssids
6181                         + sizeof(*request->match_sets) * n_match_sets
6182                         + sizeof(*request->scan_plans) * n_plans
6183                         + sizeof(*request->channels) * n_channels
6184                         + ie_len, GFP_KERNEL);
6185         if (!request)
6186                 return ERR_PTR(-ENOMEM);
6187
6188         if (n_ssids)
6189                 request->ssids = (void *)&request->channels[n_channels];
6190         request->n_ssids = n_ssids;
6191         if (ie_len) {
6192                 if (n_ssids)
6193                         request->ie = (void *)(request->ssids + n_ssids);
6194                 else
6195                         request->ie = (void *)(request->channels + n_channels);
6196         }
6197
6198         if (n_match_sets) {
6199                 if (request->ie)
6200                         request->match_sets = (void *)(request->ie + ie_len);
6201                 else if (n_ssids)
6202                         request->match_sets =
6203                                 (void *)(request->ssids + n_ssids);
6204                 else
6205                         request->match_sets =
6206                                 (void *)(request->channels + n_channels);
6207         }
6208         request->n_match_sets = n_match_sets;
6209
6210         if (n_match_sets)
6211                 request->scan_plans = (void *)(request->match_sets +
6212                                                n_match_sets);
6213         else if (request->ie)
6214                 request->scan_plans = (void *)(request->ie + ie_len);
6215         else if (n_ssids)
6216                 request->scan_plans = (void *)(request->ssids + n_ssids);
6217         else
6218                 request->scan_plans = (void *)(request->channels + n_channels);
6219
6220         request->n_scan_plans = n_plans;
6221
6222         i = 0;
6223         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6224                 /* user specified, bail out if channel not found */
6225                 nla_for_each_nested(attr,
6226                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6227                                     tmp) {
6228                         struct ieee80211_channel *chan;
6229
6230                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6231
6232                         if (!chan) {
6233                                 err = -EINVAL;
6234                                 goto out_free;
6235                         }
6236
6237                         /* ignore disabled channels */
6238                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6239                                 continue;
6240
6241                         request->channels[i] = chan;
6242                         i++;
6243                 }
6244         } else {
6245                 /* all channels */
6246                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6247                         int j;
6248                         if (!wiphy->bands[band])
6249                                 continue;
6250                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6251                                 struct ieee80211_channel *chan;
6252
6253                                 chan = &wiphy->bands[band]->channels[j];
6254
6255                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6256                                         continue;
6257
6258                                 request->channels[i] = chan;
6259                                 i++;
6260                         }
6261                 }
6262         }
6263
6264         if (!i) {
6265                 err = -EINVAL;
6266                 goto out_free;
6267         }
6268
6269         request->n_channels = i;
6270
6271         i = 0;
6272         if (n_ssids) {
6273                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6274                                     tmp) {
6275                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6276                                 err = -EINVAL;
6277                                 goto out_free;
6278                         }
6279                         request->ssids[i].ssid_len = nla_len(attr);
6280                         memcpy(request->ssids[i].ssid, nla_data(attr),
6281                                nla_len(attr));
6282                         i++;
6283                 }
6284         }
6285
6286         i = 0;
6287         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6288                 nla_for_each_nested(attr,
6289                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6290                                     tmp) {
6291                         struct nlattr *ssid, *rssi;
6292
6293                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6294                                         nla_data(attr), nla_len(attr),
6295                                         nl80211_match_policy);
6296                         if (err)
6297                                 goto out_free;
6298                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6299                         if (ssid) {
6300                                 if (WARN_ON(i >= n_match_sets)) {
6301                                         /* this indicates a programming error,
6302                                          * the loop above should have verified
6303                                          * things properly
6304                                          */
6305                                         err = -EINVAL;
6306                                         goto out_free;
6307                                 }
6308
6309                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6310                                         err = -EINVAL;
6311                                         goto out_free;
6312                                 }
6313                                 memcpy(request->match_sets[i].ssid.ssid,
6314                                        nla_data(ssid), nla_len(ssid));
6315                                 request->match_sets[i].ssid.ssid_len =
6316                                         nla_len(ssid);
6317                                 /* special attribute - old implemenation w/a */
6318                                 request->match_sets[i].rssi_thold =
6319                                         default_match_rssi;
6320                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6321                                 if (rssi)
6322                                         request->match_sets[i].rssi_thold =
6323                                                 nla_get_s32(rssi);
6324                         }
6325                         i++;
6326                 }
6327
6328                 /* there was no other matchset, so the RSSI one is alone */
6329                 if (i == 0 && n_match_sets)
6330                         request->match_sets[0].rssi_thold = default_match_rssi;
6331
6332                 request->min_rssi_thold = INT_MAX;
6333                 for (i = 0; i < n_match_sets; i++)
6334                         request->min_rssi_thold =
6335                                 min(request->match_sets[i].rssi_thold,
6336                                     request->min_rssi_thold);
6337         } else {
6338                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6339         }
6340
6341         if (ie_len) {
6342                 request->ie_len = ie_len;
6343                 memcpy((void *)request->ie,
6344                        nla_data(attrs[NL80211_ATTR_IE]),
6345                        request->ie_len);
6346         }
6347
6348         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6349                 request->flags = nla_get_u32(
6350                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6351                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6352                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6353                         err = -EOPNOTSUPP;
6354                         goto out_free;
6355                 }
6356
6357                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6358                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6359
6360                         if (!wdev) /* must be net-detect */
6361                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6362
6363                         if (!(wiphy->features & flg)) {
6364                                 err = -EOPNOTSUPP;
6365                                 goto out_free;
6366                         }
6367
6368                         if (wdev && wdev->current_bss) {
6369                                 err = -EOPNOTSUPP;
6370                                 goto out_free;
6371                         }
6372
6373                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6374                                                        request->mac_addr_mask);
6375                         if (err)
6376                                 goto out_free;
6377                 }
6378         }
6379
6380         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6381                 request->delay =
6382                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6383
6384         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6385         if (err)
6386                 goto out_free;
6387
6388         request->scan_start = jiffies;
6389
6390         return request;
6391
6392 out_free:
6393         kfree(request);
6394         return ERR_PTR(err);
6395 }
6396
6397 static int nl80211_start_sched_scan(struct sk_buff *skb,
6398                                     struct genl_info *info)
6399 {
6400         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6401         struct net_device *dev = info->user_ptr[1];
6402         struct wireless_dev *wdev = dev->ieee80211_ptr;
6403         struct cfg80211_sched_scan_request *sched_scan_req;
6404         int err;
6405
6406         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6407             !rdev->ops->sched_scan_start)
6408                 return -EOPNOTSUPP;
6409
6410         if (rdev->sched_scan_req)
6411                 return -EINPROGRESS;
6412
6413         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6414                                                   info->attrs);
6415
6416         err = PTR_ERR_OR_ZERO(sched_scan_req);
6417         if (err)
6418                 goto out_err;
6419
6420         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6421         if (err)
6422                 goto out_free;
6423
6424         sched_scan_req->dev = dev;
6425         sched_scan_req->wiphy = &rdev->wiphy;
6426
6427         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6428                 sched_scan_req->owner_nlportid = info->snd_portid;
6429
6430         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6431
6432         nl80211_send_sched_scan(rdev, dev,
6433                                 NL80211_CMD_START_SCHED_SCAN);
6434         return 0;
6435
6436 out_free:
6437         kfree(sched_scan_req);
6438 out_err:
6439         return err;
6440 }
6441
6442 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6443                                    struct genl_info *info)
6444 {
6445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6446
6447         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6448             !rdev->ops->sched_scan_stop)
6449                 return -EOPNOTSUPP;
6450
6451         return __cfg80211_stop_sched_scan(rdev, false);
6452 }
6453
6454 static int nl80211_start_radar_detection(struct sk_buff *skb,
6455                                          struct genl_info *info)
6456 {
6457         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6458         struct net_device *dev = info->user_ptr[1];
6459         struct wireless_dev *wdev = dev->ieee80211_ptr;
6460         struct cfg80211_chan_def chandef;
6461         enum nl80211_dfs_regions dfs_region;
6462         unsigned int cac_time_ms;
6463         int err;
6464
6465         dfs_region = reg_get_dfs_region(wdev->wiphy);
6466         if (dfs_region == NL80211_DFS_UNSET)
6467                 return -EINVAL;
6468
6469         err = nl80211_parse_chandef(rdev, info, &chandef);
6470         if (err)
6471                 return err;
6472
6473         if (netif_carrier_ok(dev))
6474                 return -EBUSY;
6475
6476         if (wdev->cac_started)
6477                 return -EBUSY;
6478
6479         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6480                                             wdev->iftype);
6481         if (err < 0)
6482                 return err;
6483
6484         if (err == 0)
6485                 return -EINVAL;
6486
6487         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6488                 return -EINVAL;
6489
6490         if (!rdev->ops->start_radar_detection)
6491                 return -EOPNOTSUPP;
6492
6493         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6494         if (WARN_ON(!cac_time_ms))
6495                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6496
6497         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
6498                                                cac_time_ms);
6499         if (!err) {
6500                 wdev->chandef = chandef;
6501                 wdev->cac_started = true;
6502                 wdev->cac_start_time = jiffies;
6503                 wdev->cac_time_ms = cac_time_ms;
6504         }
6505         return err;
6506 }
6507
6508 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6509 {
6510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6511         struct net_device *dev = info->user_ptr[1];
6512         struct wireless_dev *wdev = dev->ieee80211_ptr;
6513         struct cfg80211_csa_settings params;
6514         /* csa_attrs is defined static to avoid waste of stack size - this
6515          * function is called under RTNL lock, so this should not be a problem.
6516          */
6517         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6518         int err;
6519         bool need_new_beacon = false;
6520         int len, i;
6521         u32 cs_count;
6522
6523         if (!rdev->ops->channel_switch ||
6524             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6525                 return -EOPNOTSUPP;
6526
6527         switch (dev->ieee80211_ptr->iftype) {
6528         case NL80211_IFTYPE_AP:
6529         case NL80211_IFTYPE_P2P_GO:
6530                 need_new_beacon = true;
6531
6532                 /* useless if AP is not running */
6533                 if (!wdev->beacon_interval)
6534                         return -ENOTCONN;
6535                 break;
6536         case NL80211_IFTYPE_ADHOC:
6537                 if (!wdev->ssid_len)
6538                         return -ENOTCONN;
6539                 break;
6540         case NL80211_IFTYPE_MESH_POINT:
6541                 if (!wdev->mesh_id_len)
6542                         return -ENOTCONN;
6543                 break;
6544         default:
6545                 return -EOPNOTSUPP;
6546         }
6547
6548         memset(&params, 0, sizeof(params));
6549
6550         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6551             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6552                 return -EINVAL;
6553
6554         /* only important for AP, IBSS and mesh create IEs internally */
6555         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6556                 return -EINVAL;
6557
6558         /* Even though the attribute is u32, the specification says
6559          * u8, so let's make sure we don't overflow.
6560          */
6561         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6562         if (cs_count > 255)
6563                 return -EINVAL;
6564
6565         params.count = cs_count;
6566
6567         if (!need_new_beacon)
6568                 goto skip_beacons;
6569
6570         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6571         if (err)
6572                 return err;
6573
6574         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6575                                info->attrs[NL80211_ATTR_CSA_IES],
6576                                nl80211_policy);
6577         if (err)
6578                 return err;
6579
6580         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6581         if (err)
6582                 return err;
6583
6584         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6585                 return -EINVAL;
6586
6587         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6588         if (!len || (len % sizeof(u16)))
6589                 return -EINVAL;
6590
6591         params.n_counter_offsets_beacon = len / sizeof(u16);
6592         if (rdev->wiphy.max_num_csa_counters &&
6593             (params.n_counter_offsets_beacon >
6594              rdev->wiphy.max_num_csa_counters))
6595                 return -EINVAL;
6596
6597         params.counter_offsets_beacon =
6598                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6599
6600         /* sanity checks - counters should fit and be the same */
6601         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6602                 u16 offset = params.counter_offsets_beacon[i];
6603
6604                 if (offset >= params.beacon_csa.tail_len)
6605                         return -EINVAL;
6606
6607                 if (params.beacon_csa.tail[offset] != params.count)
6608                         return -EINVAL;
6609         }
6610
6611         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6612                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6613                 if (!len || (len % sizeof(u16)))
6614                         return -EINVAL;
6615
6616                 params.n_counter_offsets_presp = len / sizeof(u16);
6617                 if (rdev->wiphy.max_num_csa_counters &&
6618                     (params.n_counter_offsets_presp >
6619                      rdev->wiphy.max_num_csa_counters))
6620                         return -EINVAL;
6621
6622                 params.counter_offsets_presp =
6623                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6624
6625                 /* sanity checks - counters should fit and be the same */
6626                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6627                         u16 offset = params.counter_offsets_presp[i];
6628
6629                         if (offset >= params.beacon_csa.probe_resp_len)
6630                                 return -EINVAL;
6631
6632                         if (params.beacon_csa.probe_resp[offset] !=
6633                             params.count)
6634                                 return -EINVAL;
6635                 }
6636         }
6637
6638 skip_beacons:
6639         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6640         if (err)
6641                 return err;
6642
6643         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6644                                            wdev->iftype))
6645                 return -EINVAL;
6646
6647         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6648                                             &params.chandef,
6649                                             wdev->iftype);
6650         if (err < 0)
6651                 return err;
6652
6653         if (err > 0)
6654                 params.radar_required = true;
6655
6656         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6657                 params.block_tx = true;
6658
6659         wdev_lock(wdev);
6660         err = rdev_channel_switch(rdev, dev, &params);
6661         wdev_unlock(wdev);
6662
6663         return err;
6664 }
6665
6666 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6667                             u32 seq, int flags,
6668                             struct cfg80211_registered_device *rdev,
6669                             struct wireless_dev *wdev,
6670                             struct cfg80211_internal_bss *intbss)
6671 {
6672         struct cfg80211_bss *res = &intbss->pub;
6673         const struct cfg80211_bss_ies *ies;
6674         void *hdr;
6675         struct nlattr *bss;
6676
6677         ASSERT_WDEV_LOCK(wdev);
6678
6679         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6680                              NL80211_CMD_NEW_SCAN_RESULTS);
6681         if (!hdr)
6682                 return -1;
6683
6684         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6685
6686         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6687                 goto nla_put_failure;
6688         if (wdev->netdev &&
6689             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6690                 goto nla_put_failure;
6691         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6692                 goto nla_put_failure;
6693
6694         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6695         if (!bss)
6696                 goto nla_put_failure;
6697         if ((!is_zero_ether_addr(res->bssid) &&
6698              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6699                 goto nla_put_failure;
6700
6701         rcu_read_lock();
6702         /* indicate whether we have probe response data or not */
6703         if (rcu_access_pointer(res->proberesp_ies) &&
6704             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6705                 goto fail_unlock_rcu;
6706
6707         /* this pointer prefers to be pointed to probe response data
6708          * but is always valid
6709          */
6710         ies = rcu_dereference(res->ies);
6711         if (ies) {
6712                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6713                         goto fail_unlock_rcu;
6714                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6715                                         ies->len, ies->data))
6716                         goto fail_unlock_rcu;
6717         }
6718
6719         /* and this pointer is always (unless driver didn't know) beacon data */
6720         ies = rcu_dereference(res->beacon_ies);
6721         if (ies && ies->from_beacon) {
6722                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6723                         goto fail_unlock_rcu;
6724                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6725                                         ies->len, ies->data))
6726                         goto fail_unlock_rcu;
6727         }
6728         rcu_read_unlock();
6729
6730         if (res->beacon_interval &&
6731             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6732                 goto nla_put_failure;
6733         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6734             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6735             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6736             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6737                         jiffies_to_msecs(jiffies - intbss->ts)))
6738                 goto nla_put_failure;
6739
6740         if (intbss->ts_boottime &&
6741             nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6742                         intbss->ts_boottime))
6743                 goto nla_put_failure;
6744
6745         switch (rdev->wiphy.signal_type) {
6746         case CFG80211_SIGNAL_TYPE_MBM:
6747                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6748                         goto nla_put_failure;
6749                 break;
6750         case CFG80211_SIGNAL_TYPE_UNSPEC:
6751                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6752                         goto nla_put_failure;
6753                 break;
6754         default:
6755                 break;
6756         }
6757
6758         switch (wdev->iftype) {
6759         case NL80211_IFTYPE_P2P_CLIENT:
6760         case NL80211_IFTYPE_STATION:
6761                 if (intbss == wdev->current_bss &&
6762                     nla_put_u32(msg, NL80211_BSS_STATUS,
6763                                 NL80211_BSS_STATUS_ASSOCIATED))
6764                         goto nla_put_failure;
6765                 break;
6766         case NL80211_IFTYPE_ADHOC:
6767                 if (intbss == wdev->current_bss &&
6768                     nla_put_u32(msg, NL80211_BSS_STATUS,
6769                                 NL80211_BSS_STATUS_IBSS_JOINED))
6770                         goto nla_put_failure;
6771                 break;
6772         default:
6773                 break;
6774         }
6775
6776         nla_nest_end(msg, bss);
6777
6778         genlmsg_end(msg, hdr);
6779         return 0;
6780
6781  fail_unlock_rcu:
6782         rcu_read_unlock();
6783  nla_put_failure:
6784         genlmsg_cancel(msg, hdr);
6785         return -EMSGSIZE;
6786 }
6787
6788 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6789 {
6790         struct cfg80211_registered_device *rdev;
6791         struct cfg80211_internal_bss *scan;
6792         struct wireless_dev *wdev;
6793         int start = cb->args[2], idx = 0;
6794         int err;
6795
6796         rtnl_lock();
6797         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6798         if (err) {
6799                 rtnl_unlock();
6800                 return err;
6801         }
6802
6803         wdev_lock(wdev);
6804         spin_lock_bh(&rdev->bss_lock);
6805         cfg80211_bss_expire(rdev);
6806
6807         cb->seq = rdev->bss_generation;
6808
6809         list_for_each_entry(scan, &rdev->bss_list, list) {
6810                 if (++idx <= start)
6811                         continue;
6812                 if (nl80211_send_bss(skb, cb,
6813                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6814                                 rdev, wdev, scan) < 0) {
6815                         idx--;
6816                         break;
6817                 }
6818         }
6819
6820         spin_unlock_bh(&rdev->bss_lock);
6821         wdev_unlock(wdev);
6822
6823         cb->args[2] = idx;
6824         rtnl_unlock();
6825
6826         return skb->len;
6827 }
6828
6829 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6830                                int flags, struct net_device *dev,
6831                                bool allow_radio_stats,
6832                                struct survey_info *survey)
6833 {
6834         void *hdr;
6835         struct nlattr *infoattr;
6836
6837         /* skip radio stats if userspace didn't request them */
6838         if (!survey->channel && !allow_radio_stats)
6839                 return 0;
6840
6841         hdr = nl80211hdr_put(msg, portid, seq, flags,
6842                              NL80211_CMD_NEW_SURVEY_RESULTS);
6843         if (!hdr)
6844                 return -ENOMEM;
6845
6846         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6847                 goto nla_put_failure;
6848
6849         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6850         if (!infoattr)
6851                 goto nla_put_failure;
6852
6853         if (survey->channel &&
6854             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6855                         survey->channel->center_freq))
6856                 goto nla_put_failure;
6857
6858         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6859             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6860                 goto nla_put_failure;
6861         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6862             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6863                 goto nla_put_failure;
6864         if ((survey->filled & SURVEY_INFO_TIME) &&
6865             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME,
6866                         survey->time))
6867                 goto nla_put_failure;
6868         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
6869             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_BUSY,
6870                         survey->time_busy))
6871                 goto nla_put_failure;
6872         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
6873             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
6874                         survey->time_ext_busy))
6875                 goto nla_put_failure;
6876         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
6877             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_RX,
6878                         survey->time_rx))
6879                 goto nla_put_failure;
6880         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
6881             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_TX,
6882                         survey->time_tx))
6883                 goto nla_put_failure;
6884         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
6885             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_SCAN,
6886                         survey->time_scan))
6887                 goto nla_put_failure;
6888
6889         nla_nest_end(msg, infoattr);
6890
6891         genlmsg_end(msg, hdr);
6892         return 0;
6893
6894  nla_put_failure:
6895         genlmsg_cancel(msg, hdr);
6896         return -EMSGSIZE;
6897 }
6898
6899 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
6900 {
6901         struct survey_info survey;
6902         struct cfg80211_registered_device *rdev;
6903         struct wireless_dev *wdev;
6904         int survey_idx = cb->args[2];
6905         int res;
6906         bool radio_stats;
6907
6908         rtnl_lock();
6909         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6910         if (res)
6911                 goto out_err;
6912
6913         /* prepare_wdev_dump parsed the attributes */
6914         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
6915
6916         if (!wdev->netdev) {
6917                 res = -EINVAL;
6918                 goto out_err;
6919         }
6920
6921         if (!rdev->ops->dump_survey) {
6922                 res = -EOPNOTSUPP;
6923                 goto out_err;
6924         }
6925
6926         while (1) {
6927                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6928                 if (res == -ENOENT)
6929                         break;
6930                 if (res)
6931                         goto out_err;
6932
6933                 /* don't send disabled channels, but do send non-channel data */
6934                 if (survey.channel &&
6935                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
6936                         survey_idx++;
6937                         continue;
6938                 }
6939
6940                 if (nl80211_send_survey(skb,
6941                                 NETLINK_CB(cb->skb).portid,
6942                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6943                                 wdev->netdev, radio_stats, &survey) < 0)
6944                         goto out;
6945                 survey_idx++;
6946         }
6947
6948  out:
6949         cb->args[2] = survey_idx;
6950         res = skb->len;
6951  out_err:
6952         rtnl_unlock();
6953         return res;
6954 }
6955
6956 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6957 {
6958         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6959                                   NL80211_WPA_VERSION_2));
6960 }
6961
6962 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6963 {
6964         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6965         struct net_device *dev = info->user_ptr[1];
6966         struct ieee80211_channel *chan;
6967         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6968         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6969         enum nl80211_auth_type auth_type;
6970         struct key_parse key;
6971         bool local_state_change;
6972
6973         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6974                 return -EINVAL;
6975
6976         if (!info->attrs[NL80211_ATTR_MAC])
6977                 return -EINVAL;
6978
6979         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6980                 return -EINVAL;
6981
6982         if (!info->attrs[NL80211_ATTR_SSID])
6983                 return -EINVAL;
6984
6985         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6986                 return -EINVAL;
6987
6988         err = nl80211_parse_key(info, &key);
6989         if (err)
6990                 return err;
6991
6992         if (key.idx >= 0) {
6993                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6994                         return -EINVAL;
6995                 if (!key.p.key || !key.p.key_len)
6996                         return -EINVAL;
6997                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6998                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6999                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7000                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7001                         return -EINVAL;
7002                 if (key.idx > 4)
7003                         return -EINVAL;
7004         } else {
7005                 key.p.key_len = 0;
7006                 key.p.key = NULL;
7007         }
7008
7009         if (key.idx >= 0) {
7010                 int i;
7011                 bool ok = false;
7012                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7013                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7014                                 ok = true;
7015                                 break;
7016                         }
7017                 }
7018                 if (!ok)
7019                         return -EINVAL;
7020         }
7021
7022         if (!rdev->ops->auth)
7023                 return -EOPNOTSUPP;
7024
7025         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7026             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7027                 return -EOPNOTSUPP;
7028
7029         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7030         chan = nl80211_get_valid_chan(&rdev->wiphy,
7031                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7032         if (!chan)
7033                 return -EINVAL;
7034
7035         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7036         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7037
7038         if (info->attrs[NL80211_ATTR_IE]) {
7039                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7040                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7041         }
7042
7043         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7044         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7045                 return -EINVAL;
7046
7047         if (auth_type == NL80211_AUTHTYPE_SAE &&
7048             !info->attrs[NL80211_ATTR_SAE_DATA])
7049                 return -EINVAL;
7050
7051         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7052                 if (auth_type != NL80211_AUTHTYPE_SAE)
7053                         return -EINVAL;
7054                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7055                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7056                 /* need to include at least Auth Transaction and Status Code */
7057                 if (sae_data_len < 4)
7058                         return -EINVAL;
7059         }
7060
7061         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7062
7063         /*
7064          * Since we no longer track auth state, ignore
7065          * requests to only change local state.
7066          */
7067         if (local_state_change)
7068                 return 0;
7069
7070         wdev_lock(dev->ieee80211_ptr);
7071         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7072                                  ssid, ssid_len, ie, ie_len,
7073                                  key.p.key, key.p.key_len, key.idx,
7074                                  sae_data, sae_data_len);
7075         wdev_unlock(dev->ieee80211_ptr);
7076         return err;
7077 }
7078
7079 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7080                                    struct genl_info *info,
7081                                    struct cfg80211_crypto_settings *settings,
7082                                    int cipher_limit)
7083 {
7084         memset(settings, 0, sizeof(*settings));
7085
7086         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7087
7088         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7089                 u16 proto;
7090                 proto = nla_get_u16(
7091                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7092                 settings->control_port_ethertype = cpu_to_be16(proto);
7093                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7094                     proto != ETH_P_PAE)
7095                         return -EINVAL;
7096                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7097                         settings->control_port_no_encrypt = true;
7098         } else
7099                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7100
7101         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7102                 void *data;
7103                 int len, i;
7104
7105                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7106                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7107                 settings->n_ciphers_pairwise = len / sizeof(u32);
7108
7109                 if (len % sizeof(u32))
7110                         return -EINVAL;
7111
7112                 if (settings->n_ciphers_pairwise > cipher_limit)
7113                         return -EINVAL;
7114
7115                 memcpy(settings->ciphers_pairwise, data, len);
7116
7117                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7118                         if (!cfg80211_supported_cipher_suite(
7119                                         &rdev->wiphy,
7120                                         settings->ciphers_pairwise[i]))
7121                                 return -EINVAL;
7122         }
7123
7124         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7125                 settings->cipher_group =
7126                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7127                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7128                                                      settings->cipher_group))
7129                         return -EINVAL;
7130         }
7131
7132         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7133                 settings->wpa_versions =
7134                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7135                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7136                         return -EINVAL;
7137         }
7138
7139         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7140                 void *data;
7141                 int len;
7142
7143                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7144                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7145                 settings->n_akm_suites = len / sizeof(u32);
7146
7147                 if (len % sizeof(u32))
7148                         return -EINVAL;
7149
7150                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7151                         return -EINVAL;
7152
7153                 memcpy(settings->akm_suites, data, len);
7154         }
7155
7156         return 0;
7157 }
7158
7159 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7160 {
7161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7162         struct net_device *dev = info->user_ptr[1];
7163         struct ieee80211_channel *chan;
7164         struct cfg80211_assoc_request req = {};
7165         const u8 *bssid, *ssid;
7166         int err, ssid_len = 0;
7167
7168         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7169                 return -EINVAL;
7170
7171         if (!info->attrs[NL80211_ATTR_MAC] ||
7172             !info->attrs[NL80211_ATTR_SSID] ||
7173             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7174                 return -EINVAL;
7175
7176         if (!rdev->ops->assoc)
7177                 return -EOPNOTSUPP;
7178
7179         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7180             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7181                 return -EOPNOTSUPP;
7182
7183         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7184
7185         chan = nl80211_get_valid_chan(&rdev->wiphy,
7186                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7187         if (!chan)
7188                 return -EINVAL;
7189
7190         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7191         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7192
7193         if (info->attrs[NL80211_ATTR_IE]) {
7194                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7195                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7196         }
7197
7198         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7199                 enum nl80211_mfp mfp =
7200                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7201                 if (mfp == NL80211_MFP_REQUIRED)
7202                         req.use_mfp = true;
7203                 else if (mfp != NL80211_MFP_NO)
7204                         return -EINVAL;
7205         }
7206
7207         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7208                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7209
7210         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7211                 req.flags |= ASSOC_REQ_DISABLE_HT;
7212
7213         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7214                 memcpy(&req.ht_capa_mask,
7215                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7216                        sizeof(req.ht_capa_mask));
7217
7218         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7219                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7220                         return -EINVAL;
7221                 memcpy(&req.ht_capa,
7222                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7223                        sizeof(req.ht_capa));
7224         }
7225
7226         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7227                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7228
7229         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7230                 memcpy(&req.vht_capa_mask,
7231                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7232                        sizeof(req.vht_capa_mask));
7233
7234         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7235                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7236                         return -EINVAL;
7237                 memcpy(&req.vht_capa,
7238                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7239                        sizeof(req.vht_capa));
7240         }
7241
7242         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7243                 if (!(rdev->wiphy.features &
7244                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7245                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7246                         return -EINVAL;
7247                 req.flags |= ASSOC_REQ_USE_RRM;
7248         }
7249
7250         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7251         if (!err) {
7252                 wdev_lock(dev->ieee80211_ptr);
7253                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7254                                           ssid, ssid_len, &req);
7255                 wdev_unlock(dev->ieee80211_ptr);
7256         }
7257
7258         return err;
7259 }
7260
7261 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7262 {
7263         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7264         struct net_device *dev = info->user_ptr[1];
7265         const u8 *ie = NULL, *bssid;
7266         int ie_len = 0, err;
7267         u16 reason_code;
7268         bool local_state_change;
7269
7270         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7271                 return -EINVAL;
7272
7273         if (!info->attrs[NL80211_ATTR_MAC])
7274                 return -EINVAL;
7275
7276         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7277                 return -EINVAL;
7278
7279         if (!rdev->ops->deauth)
7280                 return -EOPNOTSUPP;
7281
7282         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7283             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7284                 return -EOPNOTSUPP;
7285
7286         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7287
7288         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7289         if (reason_code == 0) {
7290                 /* Reason Code 0 is reserved */
7291                 return -EINVAL;
7292         }
7293
7294         if (info->attrs[NL80211_ATTR_IE]) {
7295                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7296                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7297         }
7298
7299         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7300
7301         wdev_lock(dev->ieee80211_ptr);
7302         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7303                                    local_state_change);
7304         wdev_unlock(dev->ieee80211_ptr);
7305         return err;
7306 }
7307
7308 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7309 {
7310         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7311         struct net_device *dev = info->user_ptr[1];
7312         const u8 *ie = NULL, *bssid;
7313         int ie_len = 0, err;
7314         u16 reason_code;
7315         bool local_state_change;
7316
7317         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7318                 return -EINVAL;
7319
7320         if (!info->attrs[NL80211_ATTR_MAC])
7321                 return -EINVAL;
7322
7323         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7324                 return -EINVAL;
7325
7326         if (!rdev->ops->disassoc)
7327                 return -EOPNOTSUPP;
7328
7329         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7330             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7331                 return -EOPNOTSUPP;
7332
7333         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7334
7335         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7336         if (reason_code == 0) {
7337                 /* Reason Code 0 is reserved */
7338                 return -EINVAL;
7339         }
7340
7341         if (info->attrs[NL80211_ATTR_IE]) {
7342                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7343                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7344         }
7345
7346         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7347
7348         wdev_lock(dev->ieee80211_ptr);
7349         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7350                                      local_state_change);
7351         wdev_unlock(dev->ieee80211_ptr);
7352         return err;
7353 }
7354
7355 static bool
7356 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7357                          int mcast_rate[IEEE80211_NUM_BANDS],
7358                          int rateval)
7359 {
7360         struct wiphy *wiphy = &rdev->wiphy;
7361         bool found = false;
7362         int band, i;
7363
7364         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7365                 struct ieee80211_supported_band *sband;
7366
7367                 sband = wiphy->bands[band];
7368                 if (!sband)
7369                         continue;
7370
7371                 for (i = 0; i < sband->n_bitrates; i++) {
7372                         if (sband->bitrates[i].bitrate == rateval) {
7373                                 mcast_rate[band] = i + 1;
7374                                 found = true;
7375                                 break;
7376                         }
7377                 }
7378         }
7379
7380         return found;
7381 }
7382
7383 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7384 {
7385         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7386         struct net_device *dev = info->user_ptr[1];
7387         struct cfg80211_ibss_params ibss;
7388         struct wiphy *wiphy;
7389         struct cfg80211_cached_keys *connkeys = NULL;
7390         int err;
7391
7392         memset(&ibss, 0, sizeof(ibss));
7393
7394         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7395                 return -EINVAL;
7396
7397         if (!info->attrs[NL80211_ATTR_SSID] ||
7398             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7399                 return -EINVAL;
7400
7401         ibss.beacon_interval = 100;
7402
7403         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7404                 ibss.beacon_interval =
7405                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7406                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7407                         return -EINVAL;
7408         }
7409
7410         if (!rdev->ops->join_ibss)
7411                 return -EOPNOTSUPP;
7412
7413         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7414                 return -EOPNOTSUPP;
7415
7416         wiphy = &rdev->wiphy;
7417
7418         if (info->attrs[NL80211_ATTR_MAC]) {
7419                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7420
7421                 if (!is_valid_ether_addr(ibss.bssid))
7422                         return -EINVAL;
7423         }
7424         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7425         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7426
7427         if (info->attrs[NL80211_ATTR_IE]) {
7428                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7429                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7430         }
7431
7432         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7433         if (err)
7434                 return err;
7435
7436         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7437                                      NL80211_IFTYPE_ADHOC))
7438                 return -EINVAL;
7439
7440         switch (ibss.chandef.width) {
7441         case NL80211_CHAN_WIDTH_5:
7442         case NL80211_CHAN_WIDTH_10:
7443         case NL80211_CHAN_WIDTH_20_NOHT:
7444                 break;
7445         case NL80211_CHAN_WIDTH_20:
7446         case NL80211_CHAN_WIDTH_40:
7447                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7448                         return -EINVAL;
7449                 break;
7450         case NL80211_CHAN_WIDTH_80:
7451         case NL80211_CHAN_WIDTH_80P80:
7452         case NL80211_CHAN_WIDTH_160:
7453                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7454                         return -EINVAL;
7455                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7456                                              NL80211_EXT_FEATURE_VHT_IBSS))
7457                         return -EINVAL;
7458                 break;
7459         default:
7460                 return -EINVAL;
7461         }
7462
7463         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7464         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7465
7466         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7467                 u8 *rates =
7468                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7469                 int n_rates =
7470                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7471                 struct ieee80211_supported_band *sband =
7472                         wiphy->bands[ibss.chandef.chan->band];
7473
7474                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7475                                              &ibss.basic_rates);
7476                 if (err)
7477                         return err;
7478         }
7479
7480         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7481                 memcpy(&ibss.ht_capa_mask,
7482                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7483                        sizeof(ibss.ht_capa_mask));
7484
7485         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7486                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7487                         return -EINVAL;
7488                 memcpy(&ibss.ht_capa,
7489                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7490                        sizeof(ibss.ht_capa));
7491         }
7492
7493         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7494             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7495                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7496                 return -EINVAL;
7497
7498         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7499                 bool no_ht = false;
7500
7501                 connkeys = nl80211_parse_connkeys(rdev,
7502                                           info->attrs[NL80211_ATTR_KEYS],
7503                                           &no_ht);
7504                 if (IS_ERR(connkeys))
7505                         return PTR_ERR(connkeys);
7506
7507                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7508                     no_ht) {
7509                         kfree(connkeys);
7510                         return -EINVAL;
7511                 }
7512         }
7513
7514         ibss.control_port =
7515                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7516
7517         ibss.userspace_handles_dfs =
7518                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7519
7520         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7521         if (err)
7522                 kzfree(connkeys);
7523         return err;
7524 }
7525
7526 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7527 {
7528         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7529         struct net_device *dev = info->user_ptr[1];
7530
7531         if (!rdev->ops->leave_ibss)
7532                 return -EOPNOTSUPP;
7533
7534         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7535                 return -EOPNOTSUPP;
7536
7537         return cfg80211_leave_ibss(rdev, dev, false);
7538 }
7539
7540 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7541 {
7542         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7543         struct net_device *dev = info->user_ptr[1];
7544         int mcast_rate[IEEE80211_NUM_BANDS];
7545         u32 nla_rate;
7546         int err;
7547
7548         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7549             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7550             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7551                 return -EOPNOTSUPP;
7552
7553         if (!rdev->ops->set_mcast_rate)
7554                 return -EOPNOTSUPP;
7555
7556         memset(mcast_rate, 0, sizeof(mcast_rate));
7557
7558         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7559                 return -EINVAL;
7560
7561         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7562         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7563                 return -EINVAL;
7564
7565         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
7566
7567         return err;
7568 }
7569
7570 static struct sk_buff *
7571 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7572                             struct wireless_dev *wdev, int approxlen,
7573                             u32 portid, u32 seq, enum nl80211_commands cmd,
7574                             enum nl80211_attrs attr,
7575                             const struct nl80211_vendor_cmd_info *info,
7576                             gfp_t gfp)
7577 {
7578         struct sk_buff *skb;
7579         void *hdr;
7580         struct nlattr *data;
7581
7582         skb = nlmsg_new(approxlen + 100, gfp);
7583         if (!skb)
7584                 return NULL;
7585
7586         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7587         if (!hdr) {
7588                 kfree_skb(skb);
7589                 return NULL;
7590         }
7591
7592         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7593                 goto nla_put_failure;
7594
7595         if (info) {
7596                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7597                                 info->vendor_id))
7598                         goto nla_put_failure;
7599                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7600                                 info->subcmd))
7601                         goto nla_put_failure;
7602         }
7603
7604         if (wdev) {
7605                 if (nla_put_u64(skb, NL80211_ATTR_WDEV,
7606                                 wdev_id(wdev)))
7607                         goto nla_put_failure;
7608                 if (wdev->netdev &&
7609                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7610                                 wdev->netdev->ifindex))
7611                         goto nla_put_failure;
7612         }
7613
7614         data = nla_nest_start(skb, attr);
7615
7616         ((void **)skb->cb)[0] = rdev;
7617         ((void **)skb->cb)[1] = hdr;
7618         ((void **)skb->cb)[2] = data;
7619
7620         return skb;
7621
7622  nla_put_failure:
7623         kfree_skb(skb);
7624         return NULL;
7625 }
7626
7627 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7628                                            struct wireless_dev *wdev,
7629                                            enum nl80211_commands cmd,
7630                                            enum nl80211_attrs attr,
7631                                            int vendor_event_idx,
7632                                            int approxlen, gfp_t gfp)
7633 {
7634         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7635         const struct nl80211_vendor_cmd_info *info;
7636
7637         switch (cmd) {
7638         case NL80211_CMD_TESTMODE:
7639                 if (WARN_ON(vendor_event_idx != -1))
7640                         return NULL;
7641                 info = NULL;
7642                 break;
7643         case NL80211_CMD_VENDOR:
7644                 if (WARN_ON(vendor_event_idx < 0 ||
7645                             vendor_event_idx >= wiphy->n_vendor_events))
7646                         return NULL;
7647                 info = &wiphy->vendor_events[vendor_event_idx];
7648                 break;
7649         default:
7650                 WARN_ON(1);
7651                 return NULL;
7652         }
7653
7654         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7655                                            cmd, attr, info, gfp);
7656 }
7657 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7658
7659 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7660 {
7661         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7662         void *hdr = ((void **)skb->cb)[1];
7663         struct nlattr *data = ((void **)skb->cb)[2];
7664         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7665
7666         /* clear CB data for netlink core to own from now on */
7667         memset(skb->cb, 0, sizeof(skb->cb));
7668
7669         nla_nest_end(skb, data);
7670         genlmsg_end(skb, hdr);
7671
7672         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7673                 mcgrp = NL80211_MCGRP_VENDOR;
7674
7675         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7676                                 mcgrp, gfp);
7677 }
7678 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7679
7680 #ifdef CONFIG_NL80211_TESTMODE
7681 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7682 {
7683         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7684         struct wireless_dev *wdev =
7685                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7686         int err;
7687
7688         if (!rdev->ops->testmode_cmd)
7689                 return -EOPNOTSUPP;
7690
7691         if (IS_ERR(wdev)) {
7692                 err = PTR_ERR(wdev);
7693                 if (err != -EINVAL)
7694                         return err;
7695                 wdev = NULL;
7696         } else if (wdev->wiphy != &rdev->wiphy) {
7697                 return -EINVAL;
7698         }
7699
7700         if (!info->attrs[NL80211_ATTR_TESTDATA])
7701                 return -EINVAL;
7702
7703         rdev->cur_cmd_info = info;
7704         err = rdev_testmode_cmd(rdev, wdev,
7705                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7706                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7707         rdev->cur_cmd_info = NULL;
7708
7709         return err;
7710 }
7711
7712 static int nl80211_testmode_dump(struct sk_buff *skb,
7713                                  struct netlink_callback *cb)
7714 {
7715         struct cfg80211_registered_device *rdev;
7716         int err;
7717         long phy_idx;
7718         void *data = NULL;
7719         int data_len = 0;
7720
7721         rtnl_lock();
7722
7723         if (cb->args[0]) {
7724                 /*
7725                  * 0 is a valid index, but not valid for args[0],
7726                  * so we need to offset by 1.
7727                  */
7728                 phy_idx = cb->args[0] - 1;
7729         } else {
7730                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7731                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7732                                   nl80211_policy);
7733                 if (err)
7734                         goto out_err;
7735
7736                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7737                                                   nl80211_fam.attrbuf);
7738                 if (IS_ERR(rdev)) {
7739                         err = PTR_ERR(rdev);
7740                         goto out_err;
7741                 }
7742                 phy_idx = rdev->wiphy_idx;
7743                 rdev = NULL;
7744
7745                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7746                         cb->args[1] =
7747                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7748         }
7749
7750         if (cb->args[1]) {
7751                 data = nla_data((void *)cb->args[1]);
7752                 data_len = nla_len((void *)cb->args[1]);
7753         }
7754
7755         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7756         if (!rdev) {
7757                 err = -ENOENT;
7758                 goto out_err;
7759         }
7760
7761         if (!rdev->ops->testmode_dump) {
7762                 err = -EOPNOTSUPP;
7763                 goto out_err;
7764         }
7765
7766         while (1) {
7767                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7768                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7769                                            NL80211_CMD_TESTMODE);
7770                 struct nlattr *tmdata;
7771
7772                 if (!hdr)
7773                         break;
7774
7775                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7776                         genlmsg_cancel(skb, hdr);
7777                         break;
7778                 }
7779
7780                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7781                 if (!tmdata) {
7782                         genlmsg_cancel(skb, hdr);
7783                         break;
7784                 }
7785                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7786                 nla_nest_end(skb, tmdata);
7787
7788                 if (err == -ENOBUFS || err == -ENOENT) {
7789                         genlmsg_cancel(skb, hdr);
7790                         break;
7791                 } else if (err) {
7792                         genlmsg_cancel(skb, hdr);
7793                         goto out_err;
7794                 }
7795
7796                 genlmsg_end(skb, hdr);
7797         }
7798
7799         err = skb->len;
7800         /* see above */
7801         cb->args[0] = phy_idx + 1;
7802  out_err:
7803         rtnl_unlock();
7804         return err;
7805 }
7806 #endif
7807
7808 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7809 {
7810         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7811         struct net_device *dev = info->user_ptr[1];
7812         struct cfg80211_connect_params connect;
7813         struct wiphy *wiphy;
7814         struct cfg80211_cached_keys *connkeys = NULL;
7815         int err;
7816
7817         memset(&connect, 0, sizeof(connect));
7818
7819         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7820                 return -EINVAL;
7821
7822         if (!info->attrs[NL80211_ATTR_SSID] ||
7823             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7824                 return -EINVAL;
7825
7826         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7827                 connect.auth_type =
7828                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7829                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7830                                              NL80211_CMD_CONNECT))
7831                         return -EINVAL;
7832         } else
7833                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7834
7835         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7836
7837         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7838                                       NL80211_MAX_NR_CIPHER_SUITES);
7839         if (err)
7840                 return err;
7841
7842         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7843             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7844                 return -EOPNOTSUPP;
7845
7846         wiphy = &rdev->wiphy;
7847
7848         connect.bg_scan_period = -1;
7849         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7850                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7851                 connect.bg_scan_period =
7852                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7853         }
7854
7855         if (info->attrs[NL80211_ATTR_MAC])
7856                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7857         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7858                 connect.bssid_hint =
7859                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7860         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7861         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7862
7863         if (info->attrs[NL80211_ATTR_IE]) {
7864                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7865                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7866         }
7867
7868         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7869                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7870                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7871                     connect.mfp != NL80211_MFP_NO)
7872                         return -EINVAL;
7873         } else {
7874                 connect.mfp = NL80211_MFP_NO;
7875         }
7876
7877         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7878                 connect.channel = nl80211_get_valid_chan(
7879                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7880                 if (!connect.channel)
7881                         return -EINVAL;
7882         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7883                 connect.channel_hint = nl80211_get_valid_chan(
7884                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7885                 if (!connect.channel_hint)
7886                         return -EINVAL;
7887         }
7888
7889         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7890                 connkeys = nl80211_parse_connkeys(rdev,
7891                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7892                 if (IS_ERR(connkeys))
7893                         return PTR_ERR(connkeys);
7894         }
7895
7896         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7897                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7898
7899         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7900                 memcpy(&connect.ht_capa_mask,
7901                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7902                        sizeof(connect.ht_capa_mask));
7903
7904         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7905                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7906                         kzfree(connkeys);
7907                         return -EINVAL;
7908                 }
7909                 memcpy(&connect.ht_capa,
7910                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7911                        sizeof(connect.ht_capa));
7912         }
7913
7914         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7915                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7916
7917         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7918                 memcpy(&connect.vht_capa_mask,
7919                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7920                        sizeof(connect.vht_capa_mask));
7921
7922         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7923                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7924                         kzfree(connkeys);
7925                         return -EINVAL;
7926                 }
7927                 memcpy(&connect.vht_capa,
7928                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7929                        sizeof(connect.vht_capa));
7930         }
7931
7932         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7933                 if (!(rdev->wiphy.features &
7934                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7935                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET)) {
7936                         kzfree(connkeys);
7937                         return -EINVAL;
7938                 }
7939                 connect.flags |= ASSOC_REQ_USE_RRM;
7940         }
7941
7942         wdev_lock(dev->ieee80211_ptr);
7943         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7944         wdev_unlock(dev->ieee80211_ptr);
7945         if (err)
7946                 kzfree(connkeys);
7947         return err;
7948 }
7949
7950 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7951 {
7952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7953         struct net_device *dev = info->user_ptr[1];
7954         u16 reason;
7955         int ret;
7956
7957         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7958                 reason = WLAN_REASON_DEAUTH_LEAVING;
7959         else
7960                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7961
7962         if (reason == 0)
7963                 return -EINVAL;
7964
7965         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7966             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7967                 return -EOPNOTSUPP;
7968
7969         wdev_lock(dev->ieee80211_ptr);
7970         ret = cfg80211_disconnect(rdev, dev, reason, true);
7971         wdev_unlock(dev->ieee80211_ptr);
7972         return ret;
7973 }
7974
7975 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7976 {
7977         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7978         struct net *net;
7979         int err;
7980
7981         if (info->attrs[NL80211_ATTR_PID]) {
7982                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7983
7984                 net = get_net_ns_by_pid(pid);
7985         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
7986                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
7987
7988                 net = get_net_ns_by_fd(fd);
7989         } else {
7990                 return -EINVAL;
7991         }
7992
7993         if (IS_ERR(net))
7994                 return PTR_ERR(net);
7995
7996         err = 0;
7997
7998         /* check if anything to do */
7999         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8000                 err = cfg80211_switch_netns(rdev, net);
8001
8002         put_net(net);
8003         return err;
8004 }
8005
8006 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8007 {
8008         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8009         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8010                         struct cfg80211_pmksa *pmksa) = NULL;
8011         struct net_device *dev = info->user_ptr[1];
8012         struct cfg80211_pmksa pmksa;
8013
8014         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8015
8016         if (!info->attrs[NL80211_ATTR_MAC])
8017                 return -EINVAL;
8018
8019         if (!info->attrs[NL80211_ATTR_PMKID])
8020                 return -EINVAL;
8021
8022         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8023         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8024
8025         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8026             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8027                 return -EOPNOTSUPP;
8028
8029         switch (info->genlhdr->cmd) {
8030         case NL80211_CMD_SET_PMKSA:
8031                 rdev_ops = rdev->ops->set_pmksa;
8032                 break;
8033         case NL80211_CMD_DEL_PMKSA:
8034                 rdev_ops = rdev->ops->del_pmksa;
8035                 break;
8036         default:
8037                 WARN_ON(1);
8038                 break;
8039         }
8040
8041         if (!rdev_ops)
8042                 return -EOPNOTSUPP;
8043
8044         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8045 }
8046
8047 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8048 {
8049         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8050         struct net_device *dev = info->user_ptr[1];
8051
8052         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8053             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8054                 return -EOPNOTSUPP;
8055
8056         if (!rdev->ops->flush_pmksa)
8057                 return -EOPNOTSUPP;
8058
8059         return rdev_flush_pmksa(rdev, dev);
8060 }
8061
8062 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8063 {
8064         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8065         struct net_device *dev = info->user_ptr[1];
8066         u8 action_code, dialog_token;
8067         u32 peer_capability = 0;
8068         u16 status_code;
8069         u8 *peer;
8070         bool initiator;
8071
8072         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8073             !rdev->ops->tdls_mgmt)
8074                 return -EOPNOTSUPP;
8075
8076         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8077             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8078             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8079             !info->attrs[NL80211_ATTR_IE] ||
8080             !info->attrs[NL80211_ATTR_MAC])
8081                 return -EINVAL;
8082
8083         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8084         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8085         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8086         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8087         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8088         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8089                 peer_capability =
8090                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8091
8092         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8093                               dialog_token, status_code, peer_capability,
8094                               initiator,
8095                               nla_data(info->attrs[NL80211_ATTR_IE]),
8096                               nla_len(info->attrs[NL80211_ATTR_IE]));
8097 }
8098
8099 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8100 {
8101         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8102         struct net_device *dev = info->user_ptr[1];
8103         enum nl80211_tdls_operation operation;
8104         u8 *peer;
8105
8106         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8107             !rdev->ops->tdls_oper)
8108                 return -EOPNOTSUPP;
8109
8110         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8111             !info->attrs[NL80211_ATTR_MAC])
8112                 return -EINVAL;
8113
8114         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8115         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8116
8117         return rdev_tdls_oper(rdev, dev, peer, operation);
8118 }
8119
8120 static int nl80211_remain_on_channel(struct sk_buff *skb,
8121                                      struct genl_info *info)
8122 {
8123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8124         struct wireless_dev *wdev = info->user_ptr[1];
8125         struct cfg80211_chan_def chandef;
8126         struct sk_buff *msg;
8127         void *hdr;
8128         u64 cookie;
8129         u32 duration;
8130         int err;
8131
8132         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8133             !info->attrs[NL80211_ATTR_DURATION])
8134                 return -EINVAL;
8135
8136         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8137
8138         if (!rdev->ops->remain_on_channel ||
8139             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8140                 return -EOPNOTSUPP;
8141
8142         /*
8143          * We should be on that channel for at least a minimum amount of
8144          * time (10ms) but no longer than the driver supports.
8145          */
8146         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8147             duration > rdev->wiphy.max_remain_on_channel_duration)
8148                 return -EINVAL;
8149
8150         err = nl80211_parse_chandef(rdev, info, &chandef);
8151         if (err)
8152                 return err;
8153
8154         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8155         if (!msg)
8156                 return -ENOMEM;
8157
8158         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8159                              NL80211_CMD_REMAIN_ON_CHANNEL);
8160         if (!hdr) {
8161                 err = -ENOBUFS;
8162                 goto free_msg;
8163         }
8164
8165         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8166                                      duration, &cookie);
8167
8168         if (err)
8169                 goto free_msg;
8170
8171         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8172                 goto nla_put_failure;
8173
8174         genlmsg_end(msg, hdr);
8175
8176         return genlmsg_reply(msg, info);
8177
8178  nla_put_failure:
8179         err = -ENOBUFS;
8180  free_msg:
8181         nlmsg_free(msg);
8182         return err;
8183 }
8184
8185 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8186                                             struct genl_info *info)
8187 {
8188         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8189         struct wireless_dev *wdev = info->user_ptr[1];
8190         u64 cookie;
8191
8192         if (!info->attrs[NL80211_ATTR_COOKIE])
8193                 return -EINVAL;
8194
8195         if (!rdev->ops->cancel_remain_on_channel)
8196                 return -EOPNOTSUPP;
8197
8198         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8199
8200         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8201 }
8202
8203 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8204                            u8 *rates, u8 rates_len)
8205 {
8206         u8 i;
8207         u32 mask = 0;
8208
8209         for (i = 0; i < rates_len; i++) {
8210                 int rate = (rates[i] & 0x7f) * 5;
8211                 int ridx;
8212                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8213                         struct ieee80211_rate *srate =
8214                                 &sband->bitrates[ridx];
8215                         if (rate == srate->bitrate) {
8216                                 mask |= 1 << ridx;
8217                                 break;
8218                         }
8219                 }
8220                 if (ridx == sband->n_bitrates)
8221                         return 0; /* rate not found */
8222         }
8223
8224         return mask;
8225 }
8226
8227 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8228                                u8 *rates, u8 rates_len,
8229                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8230 {
8231         u8 i;
8232
8233         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8234
8235         for (i = 0; i < rates_len; i++) {
8236                 int ridx, rbit;
8237
8238                 ridx = rates[i] / 8;
8239                 rbit = BIT(rates[i] % 8);
8240
8241                 /* check validity */
8242                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8243                         return false;
8244
8245                 /* check availability */
8246                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8247                         mcs[ridx] |= rbit;
8248                 else
8249                         return false;
8250         }
8251
8252         return true;
8253 }
8254
8255 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8256 {
8257         u16 mcs_mask = 0;
8258
8259         switch (vht_mcs_map) {
8260         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8261                 break;
8262         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8263                 mcs_mask = 0x00FF;
8264                 break;
8265         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8266                 mcs_mask = 0x01FF;
8267                 break;
8268         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8269                 mcs_mask = 0x03FF;
8270                 break;
8271         default:
8272                 break;
8273         }
8274
8275         return mcs_mask;
8276 }
8277
8278 static void vht_build_mcs_mask(u16 vht_mcs_map,
8279                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8280 {
8281         u8 nss;
8282
8283         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8284                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8285                 vht_mcs_map >>= 2;
8286         }
8287 }
8288
8289 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8290                              struct nl80211_txrate_vht *txrate,
8291                              u16 mcs[NL80211_VHT_NSS_MAX])
8292 {
8293         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8294         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8295         u8 i;
8296
8297         if (!sband->vht_cap.vht_supported)
8298                 return false;
8299
8300         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8301
8302         /* Build vht_mcs_mask from VHT capabilities */
8303         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8304
8305         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8306                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8307                         mcs[i] = txrate->mcs[i];
8308                 else
8309                         return false;
8310         }
8311
8312         return true;
8313 }
8314
8315 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8316         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8317                                     .len = NL80211_MAX_SUPP_RATES },
8318         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8319                                 .len = NL80211_MAX_SUPP_HT_RATES },
8320         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8321         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8322 };
8323
8324 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8325                                        struct genl_info *info)
8326 {
8327         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8328         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8329         struct cfg80211_bitrate_mask mask;
8330         int rem, i;
8331         struct net_device *dev = info->user_ptr[1];
8332         struct nlattr *tx_rates;
8333         struct ieee80211_supported_band *sband;
8334         u16 vht_tx_mcs_map;
8335
8336         if (!rdev->ops->set_bitrate_mask)
8337                 return -EOPNOTSUPP;
8338
8339         memset(&mask, 0, sizeof(mask));
8340         /* Default to all rates enabled */
8341         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8342                 sband = rdev->wiphy.bands[i];
8343
8344                 if (!sband)
8345                         continue;
8346
8347                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8348                 memcpy(mask.control[i].ht_mcs,
8349                        sband->ht_cap.mcs.rx_mask,
8350                        sizeof(mask.control[i].ht_mcs));
8351
8352                 if (!sband->vht_cap.vht_supported)
8353                         continue;
8354
8355                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8356                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8357         }
8358
8359         /* if no rates are given set it back to the defaults */
8360         if (!info->attrs[NL80211_ATTR_TX_RATES])
8361                 goto out;
8362
8363         /*
8364          * The nested attribute uses enum nl80211_band as the index. This maps
8365          * directly to the enum ieee80211_band values used in cfg80211.
8366          */
8367         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8368         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8369                 enum ieee80211_band band = nla_type(tx_rates);
8370                 int err;
8371
8372                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8373                         return -EINVAL;
8374                 sband = rdev->wiphy.bands[band];
8375                 if (sband == NULL)
8376                         return -EINVAL;
8377                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8378                                 nla_len(tx_rates), nl80211_txattr_policy);
8379                 if (err)
8380                         return err;
8381                 if (tb[NL80211_TXRATE_LEGACY]) {
8382                         mask.control[band].legacy = rateset_to_mask(
8383                                 sband,
8384                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8385                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8386                         if ((mask.control[band].legacy == 0) &&
8387                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8388                                 return -EINVAL;
8389                 }
8390                 if (tb[NL80211_TXRATE_HT]) {
8391                         if (!ht_rateset_to_mask(
8392                                         sband,
8393                                         nla_data(tb[NL80211_TXRATE_HT]),
8394                                         nla_len(tb[NL80211_TXRATE_HT]),
8395                                         mask.control[band].ht_mcs))
8396                                 return -EINVAL;
8397                 }
8398                 if (tb[NL80211_TXRATE_VHT]) {
8399                         if (!vht_set_mcs_mask(
8400                                         sband,
8401                                         nla_data(tb[NL80211_TXRATE_VHT]),
8402                                         mask.control[band].vht_mcs))
8403                                 return -EINVAL;
8404                 }
8405                 if (tb[NL80211_TXRATE_GI]) {
8406                         mask.control[band].gi =
8407                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8408                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8409                                 return -EINVAL;
8410                 }
8411
8412                 if (mask.control[band].legacy == 0) {
8413                         /* don't allow empty legacy rates if HT or VHT
8414                          * are not even supported.
8415                          */
8416                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8417                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8418                                 return -EINVAL;
8419
8420                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8421                                 if (mask.control[band].ht_mcs[i])
8422                                         goto out;
8423
8424                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8425                                 if (mask.control[band].vht_mcs[i])
8426                                         goto out;
8427
8428                         /* legacy and mcs rates may not be both empty */
8429                         return -EINVAL;
8430                 }
8431         }
8432
8433 out:
8434         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8435 }
8436
8437 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8438 {
8439         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8440         struct wireless_dev *wdev = info->user_ptr[1];
8441         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8442
8443         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8444                 return -EINVAL;
8445
8446         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8447                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8448
8449         switch (wdev->iftype) {
8450         case NL80211_IFTYPE_STATION:
8451         case NL80211_IFTYPE_ADHOC:
8452         case NL80211_IFTYPE_P2P_CLIENT:
8453         case NL80211_IFTYPE_AP:
8454         case NL80211_IFTYPE_AP_VLAN:
8455         case NL80211_IFTYPE_MESH_POINT:
8456         case NL80211_IFTYPE_P2P_GO:
8457         case NL80211_IFTYPE_P2P_DEVICE:
8458                 break;
8459         default:
8460                 return -EOPNOTSUPP;
8461         }
8462
8463         /* not much point in registering if we can't reply */
8464         if (!rdev->ops->mgmt_tx)
8465                 return -EOPNOTSUPP;
8466
8467         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8468                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8469                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8470 }
8471
8472 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8473 {
8474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8475         struct wireless_dev *wdev = info->user_ptr[1];
8476         struct cfg80211_chan_def chandef;
8477         int err;
8478         void *hdr = NULL;
8479         u64 cookie;
8480         struct sk_buff *msg = NULL;
8481         struct cfg80211_mgmt_tx_params params = {
8482                 .dont_wait_for_ack =
8483                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8484         };
8485
8486         if (!info->attrs[NL80211_ATTR_FRAME])
8487                 return -EINVAL;
8488
8489         if (!rdev->ops->mgmt_tx)
8490                 return -EOPNOTSUPP;
8491
8492         switch (wdev->iftype) {
8493         case NL80211_IFTYPE_P2P_DEVICE:
8494                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8495                         return -EINVAL;
8496         case NL80211_IFTYPE_STATION:
8497         case NL80211_IFTYPE_ADHOC:
8498         case NL80211_IFTYPE_P2P_CLIENT:
8499         case NL80211_IFTYPE_AP:
8500         case NL80211_IFTYPE_AP_VLAN:
8501         case NL80211_IFTYPE_MESH_POINT:
8502         case NL80211_IFTYPE_P2P_GO:
8503                 break;
8504         default:
8505                 return -EOPNOTSUPP;
8506         }
8507
8508         if (info->attrs[NL80211_ATTR_DURATION]) {
8509                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8510                         return -EINVAL;
8511                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8512
8513                 /*
8514                  * We should wait on the channel for at least a minimum amount
8515                  * of time (10ms) but no longer than the driver supports.
8516                  */
8517                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8518                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8519                         return -EINVAL;
8520
8521         }
8522
8523         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8524
8525         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8526                 return -EINVAL;
8527
8528         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8529
8530         /* get the channel if any has been specified, otherwise pass NULL to
8531          * the driver. The latter will use the current one
8532          */
8533         chandef.chan = NULL;
8534         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8535                 err = nl80211_parse_chandef(rdev, info, &chandef);
8536                 if (err)
8537                         return err;
8538         }
8539
8540         if (!chandef.chan && params.offchan)
8541                 return -EINVAL;
8542
8543         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8544         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8545
8546         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8547                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8548                 int i;
8549
8550                 if (len % sizeof(u16))
8551                         return -EINVAL;
8552
8553                 params.n_csa_offsets = len / sizeof(u16);
8554                 params.csa_offsets =
8555                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8556
8557                 /* check that all the offsets fit the frame */
8558                 for (i = 0; i < params.n_csa_offsets; i++) {
8559                         if (params.csa_offsets[i] >= params.len)
8560                                 return -EINVAL;
8561                 }
8562         }
8563
8564         if (!params.dont_wait_for_ack) {
8565                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8566                 if (!msg)
8567                         return -ENOMEM;
8568
8569                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8570                                      NL80211_CMD_FRAME);
8571                 if (!hdr) {
8572                         err = -ENOBUFS;
8573                         goto free_msg;
8574                 }
8575         }
8576
8577         params.chan = chandef.chan;
8578         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8579         if (err)
8580                 goto free_msg;
8581
8582         if (msg) {
8583                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8584                         goto nla_put_failure;
8585
8586                 genlmsg_end(msg, hdr);
8587                 return genlmsg_reply(msg, info);
8588         }
8589
8590         return 0;
8591
8592  nla_put_failure:
8593         err = -ENOBUFS;
8594  free_msg:
8595         nlmsg_free(msg);
8596         return err;
8597 }
8598
8599 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8600 {
8601         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8602         struct wireless_dev *wdev = info->user_ptr[1];
8603         u64 cookie;
8604
8605         if (!info->attrs[NL80211_ATTR_COOKIE])
8606                 return -EINVAL;
8607
8608         if (!rdev->ops->mgmt_tx_cancel_wait)
8609                 return -EOPNOTSUPP;
8610
8611         switch (wdev->iftype) {
8612         case NL80211_IFTYPE_STATION:
8613         case NL80211_IFTYPE_ADHOC:
8614         case NL80211_IFTYPE_P2P_CLIENT:
8615         case NL80211_IFTYPE_AP:
8616         case NL80211_IFTYPE_AP_VLAN:
8617         case NL80211_IFTYPE_P2P_GO:
8618         case NL80211_IFTYPE_P2P_DEVICE:
8619                 break;
8620         default:
8621                 return -EOPNOTSUPP;
8622         }
8623
8624         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8625
8626         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8627 }
8628
8629 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8630 {
8631         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8632         struct wireless_dev *wdev;
8633         struct net_device *dev = info->user_ptr[1];
8634         u8 ps_state;
8635         bool state;
8636         int err;
8637
8638         if (!info->attrs[NL80211_ATTR_PS_STATE])
8639                 return -EINVAL;
8640
8641         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8642
8643         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8644                 return -EINVAL;
8645
8646         wdev = dev->ieee80211_ptr;
8647
8648         if (!rdev->ops->set_power_mgmt)
8649                 return -EOPNOTSUPP;
8650
8651         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8652
8653         if (state == wdev->ps)
8654                 return 0;
8655
8656         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8657         if (!err)
8658                 wdev->ps = state;
8659         return err;
8660 }
8661
8662 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8663 {
8664         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8665         enum nl80211_ps_state ps_state;
8666         struct wireless_dev *wdev;
8667         struct net_device *dev = info->user_ptr[1];
8668         struct sk_buff *msg;
8669         void *hdr;
8670         int err;
8671
8672         wdev = dev->ieee80211_ptr;
8673
8674         if (!rdev->ops->set_power_mgmt)
8675                 return -EOPNOTSUPP;
8676
8677         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8678         if (!msg)
8679                 return -ENOMEM;
8680
8681         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8682                              NL80211_CMD_GET_POWER_SAVE);
8683         if (!hdr) {
8684                 err = -ENOBUFS;
8685                 goto free_msg;
8686         }
8687
8688         if (wdev->ps)
8689                 ps_state = NL80211_PS_ENABLED;
8690         else
8691                 ps_state = NL80211_PS_DISABLED;
8692
8693         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8694                 goto nla_put_failure;
8695
8696         genlmsg_end(msg, hdr);
8697         return genlmsg_reply(msg, info);
8698
8699  nla_put_failure:
8700         err = -ENOBUFS;
8701  free_msg:
8702         nlmsg_free(msg);
8703         return err;
8704 }
8705
8706 static const struct nla_policy
8707 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8708         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8709         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8710         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8711         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8712         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8713         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8714 };
8715
8716 static int nl80211_set_cqm_txe(struct genl_info *info,
8717                                u32 rate, u32 pkts, u32 intvl)
8718 {
8719         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8720         struct net_device *dev = info->user_ptr[1];
8721         struct wireless_dev *wdev = dev->ieee80211_ptr;
8722
8723         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8724                 return -EINVAL;
8725
8726         if (!rdev->ops->set_cqm_txe_config)
8727                 return -EOPNOTSUPP;
8728
8729         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8730             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8731                 return -EOPNOTSUPP;
8732
8733         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8734 }
8735
8736 static int nl80211_set_cqm_rssi(struct genl_info *info,
8737                                 s32 threshold, u32 hysteresis)
8738 {
8739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8740         struct net_device *dev = info->user_ptr[1];
8741         struct wireless_dev *wdev = dev->ieee80211_ptr;
8742
8743         if (threshold > 0)
8744                 return -EINVAL;
8745
8746         /* disabling - hysteresis should also be zero then */
8747         if (threshold == 0)
8748                 hysteresis = 0;
8749
8750         if (!rdev->ops->set_cqm_rssi_config)
8751                 return -EOPNOTSUPP;
8752
8753         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8754             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8755                 return -EOPNOTSUPP;
8756
8757         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8758 }
8759
8760 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8761 {
8762         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8763         struct nlattr *cqm;
8764         int err;
8765
8766         cqm = info->attrs[NL80211_ATTR_CQM];
8767         if (!cqm)
8768                 return -EINVAL;
8769
8770         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8771                                nl80211_attr_cqm_policy);
8772         if (err)
8773                 return err;
8774
8775         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8776             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8777                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8778                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8779
8780                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8781         }
8782
8783         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8784             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8785             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8786                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8787                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8788                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8789
8790                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8791         }
8792
8793         return -EINVAL;
8794 }
8795
8796 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8797 {
8798         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8799         struct net_device *dev = info->user_ptr[1];
8800         struct ocb_setup setup = {};
8801         int err;
8802
8803         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8804         if (err)
8805                 return err;
8806
8807         return cfg80211_join_ocb(rdev, dev, &setup);
8808 }
8809
8810 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8811 {
8812         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8813         struct net_device *dev = info->user_ptr[1];
8814
8815         return cfg80211_leave_ocb(rdev, dev);
8816 }
8817
8818 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8819 {
8820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8821         struct net_device *dev = info->user_ptr[1];
8822         struct mesh_config cfg;
8823         struct mesh_setup setup;
8824         int err;
8825
8826         /* start with default */
8827         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8828         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8829
8830         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8831                 /* and parse parameters if given */
8832                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8833                 if (err)
8834                         return err;
8835         }
8836
8837         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8838             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8839                 return -EINVAL;
8840
8841         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8842         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8843
8844         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8845             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8846                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8847                         return -EINVAL;
8848
8849         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8850                 setup.beacon_interval =
8851                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8852                 if (setup.beacon_interval < 10 ||
8853                     setup.beacon_interval > 10000)
8854                         return -EINVAL;
8855         }
8856
8857         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8858                 setup.dtim_period =
8859                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8860                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8861                         return -EINVAL;
8862         }
8863
8864         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8865                 /* parse additional setup parameters if given */
8866                 err = nl80211_parse_mesh_setup(info, &setup);
8867                 if (err)
8868                         return err;
8869         }
8870
8871         if (setup.user_mpm)
8872                 cfg.auto_open_plinks = false;
8873
8874         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8875                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8876                 if (err)
8877                         return err;
8878         } else {
8879                 /* cfg80211_join_mesh() will sort it out */
8880                 setup.chandef.chan = NULL;
8881         }
8882
8883         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8884                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8885                 int n_rates =
8886                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8887                 struct ieee80211_supported_band *sband;
8888
8889                 if (!setup.chandef.chan)
8890                         return -EINVAL;
8891
8892                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8893
8894                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8895                                              &setup.basic_rates);
8896                 if (err)
8897                         return err;
8898         }
8899
8900         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8901 }
8902
8903 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8904 {
8905         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8906         struct net_device *dev = info->user_ptr[1];
8907
8908         return cfg80211_leave_mesh(rdev, dev);
8909 }
8910
8911 #ifdef CONFIG_PM
8912 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8913                                         struct cfg80211_registered_device *rdev)
8914 {
8915         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8916         struct nlattr *nl_pats, *nl_pat;
8917         int i, pat_len;
8918
8919         if (!wowlan->n_patterns)
8920                 return 0;
8921
8922         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8923         if (!nl_pats)
8924                 return -ENOBUFS;
8925
8926         for (i = 0; i < wowlan->n_patterns; i++) {
8927                 nl_pat = nla_nest_start(msg, i + 1);
8928                 if (!nl_pat)
8929                         return -ENOBUFS;
8930                 pat_len = wowlan->patterns[i].pattern_len;
8931                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8932                             wowlan->patterns[i].mask) ||
8933                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8934                             wowlan->patterns[i].pattern) ||
8935                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8936                                 wowlan->patterns[i].pkt_offset))
8937                         return -ENOBUFS;
8938                 nla_nest_end(msg, nl_pat);
8939         }
8940         nla_nest_end(msg, nl_pats);
8941
8942         return 0;
8943 }
8944
8945 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8946                                    struct cfg80211_wowlan_tcp *tcp)
8947 {
8948         struct nlattr *nl_tcp;
8949
8950         if (!tcp)
8951                 return 0;
8952
8953         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8954         if (!nl_tcp)
8955                 return -ENOBUFS;
8956
8957         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8958             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8959             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8960             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8961             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8962             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8963                     tcp->payload_len, tcp->payload) ||
8964             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8965                         tcp->data_interval) ||
8966             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8967                     tcp->wake_len, tcp->wake_data) ||
8968             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8969                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8970                 return -ENOBUFS;
8971
8972         if (tcp->payload_seq.len &&
8973             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8974                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8975                 return -ENOBUFS;
8976
8977         if (tcp->payload_tok.len &&
8978             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8979                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8980                     &tcp->payload_tok))
8981                 return -ENOBUFS;
8982
8983         nla_nest_end(msg, nl_tcp);
8984
8985         return 0;
8986 }
8987
8988 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
8989                                   struct cfg80211_sched_scan_request *req)
8990 {
8991         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
8992         int i;
8993
8994         if (!req)
8995                 return 0;
8996
8997         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
8998         if (!nd)
8999                 return -ENOBUFS;
9000
9001         if (req->n_scan_plans == 1 &&
9002             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9003                         req->scan_plans[0].interval * 1000))
9004                 return -ENOBUFS;
9005
9006         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9007                 return -ENOBUFS;
9008
9009         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9010         if (!freqs)
9011                 return -ENOBUFS;
9012
9013         for (i = 0; i < req->n_channels; i++)
9014                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9015
9016         nla_nest_end(msg, freqs);
9017
9018         if (req->n_match_sets) {
9019                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9020                 for (i = 0; i < req->n_match_sets; i++) {
9021                         match = nla_nest_start(msg, i);
9022                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9023                                 req->match_sets[i].ssid.ssid_len,
9024                                 req->match_sets[i].ssid.ssid);
9025                         nla_nest_end(msg, match);
9026                 }
9027                 nla_nest_end(msg, matches);
9028         }
9029
9030         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9031         if (!scan_plans)
9032                 return -ENOBUFS;
9033
9034         for (i = 0; i < req->n_scan_plans; i++) {
9035                 scan_plan = nla_nest_start(msg, i + 1);
9036                 if (!scan_plan ||
9037                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9038                                 req->scan_plans[i].interval) ||
9039                     (req->scan_plans[i].iterations &&
9040                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9041                                  req->scan_plans[i].iterations)))
9042                         return -ENOBUFS;
9043                 nla_nest_end(msg, scan_plan);
9044         }
9045         nla_nest_end(msg, scan_plans);
9046
9047         nla_nest_end(msg, nd);
9048
9049         return 0;
9050 }
9051
9052 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9053 {
9054         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9055         struct sk_buff *msg;
9056         void *hdr;
9057         u32 size = NLMSG_DEFAULT_SIZE;
9058
9059         if (!rdev->wiphy.wowlan)
9060                 return -EOPNOTSUPP;
9061
9062         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9063                 /* adjust size to have room for all the data */
9064                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9065                         rdev->wiphy.wowlan_config->tcp->payload_len +
9066                         rdev->wiphy.wowlan_config->tcp->wake_len +
9067                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9068         }
9069
9070         msg = nlmsg_new(size, GFP_KERNEL);
9071         if (!msg)
9072                 return -ENOMEM;
9073
9074         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9075                              NL80211_CMD_GET_WOWLAN);
9076         if (!hdr)
9077                 goto nla_put_failure;
9078
9079         if (rdev->wiphy.wowlan_config) {
9080                 struct nlattr *nl_wowlan;
9081
9082                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9083                 if (!nl_wowlan)
9084                         goto nla_put_failure;
9085
9086                 if ((rdev->wiphy.wowlan_config->any &&
9087                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9088                     (rdev->wiphy.wowlan_config->disconnect &&
9089                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9090                     (rdev->wiphy.wowlan_config->magic_pkt &&
9091                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9092                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9093                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9094                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9095                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9096                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9097                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9098                     (rdev->wiphy.wowlan_config->rfkill_release &&
9099                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9100                         goto nla_put_failure;
9101
9102                 if (nl80211_send_wowlan_patterns(msg, rdev))
9103                         goto nla_put_failure;
9104
9105                 if (nl80211_send_wowlan_tcp(msg,
9106                                             rdev->wiphy.wowlan_config->tcp))
9107                         goto nla_put_failure;
9108
9109                 if (nl80211_send_wowlan_nd(
9110                             msg,
9111                             rdev->wiphy.wowlan_config->nd_config))
9112                         goto nla_put_failure;
9113
9114                 nla_nest_end(msg, nl_wowlan);
9115         }
9116
9117         genlmsg_end(msg, hdr);
9118         return genlmsg_reply(msg, info);
9119
9120 nla_put_failure:
9121         nlmsg_free(msg);
9122         return -ENOBUFS;
9123 }
9124
9125 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9126                                     struct nlattr *attr,
9127                                     struct cfg80211_wowlan *trig)
9128 {
9129         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9130         struct cfg80211_wowlan_tcp *cfg;
9131         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9132         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9133         u32 size;
9134         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9135         int err, port;
9136
9137         if (!rdev->wiphy.wowlan->tcp)
9138                 return -EINVAL;
9139
9140         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9141                         nla_data(attr), nla_len(attr),
9142                         nl80211_wowlan_tcp_policy);
9143         if (err)
9144                 return err;
9145
9146         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9147             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9148             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9149             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9150             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9151             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9152             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9153             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9154                 return -EINVAL;
9155
9156         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9157         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9158                 return -EINVAL;
9159
9160         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9161                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9162             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9163                 return -EINVAL;
9164
9165         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9166         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9167                 return -EINVAL;
9168
9169         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9170         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9171                 return -EINVAL;
9172
9173         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9174                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9175
9176                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9177                 tokens_size = tokln - sizeof(*tok);
9178
9179                 if (!tok->len || tokens_size % tok->len)
9180                         return -EINVAL;
9181                 if (!rdev->wiphy.wowlan->tcp->tok)
9182                         return -EINVAL;
9183                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9184                         return -EINVAL;
9185                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9186                         return -EINVAL;
9187                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9188                         return -EINVAL;
9189                 if (tok->offset + tok->len > data_size)
9190                         return -EINVAL;
9191         }
9192
9193         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9194                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9195                 if (!rdev->wiphy.wowlan->tcp->seq)
9196                         return -EINVAL;
9197                 if (seq->len == 0 || seq->len > 4)
9198                         return -EINVAL;
9199                 if (seq->len + seq->offset > data_size)
9200                         return -EINVAL;
9201         }
9202
9203         size = sizeof(*cfg);
9204         size += data_size;
9205         size += wake_size + wake_mask_size;
9206         size += tokens_size;
9207
9208         cfg = kzalloc(size, GFP_KERNEL);
9209         if (!cfg)
9210                 return -ENOMEM;
9211         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9212         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9213         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9214                ETH_ALEN);
9215         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9216                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9217         else
9218                 port = 0;
9219 #ifdef CONFIG_INET
9220         /* allocate a socket and port for it and use it */
9221         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9222                             IPPROTO_TCP, &cfg->sock, 1);
9223         if (err) {
9224                 kfree(cfg);
9225                 return err;
9226         }
9227         if (inet_csk_get_port(cfg->sock->sk, port)) {
9228                 sock_release(cfg->sock);
9229                 kfree(cfg);
9230                 return -EADDRINUSE;
9231         }
9232         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9233 #else
9234         if (!port) {
9235                 kfree(cfg);
9236                 return -EINVAL;
9237         }
9238         cfg->src_port = port;
9239 #endif
9240
9241         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9242         cfg->payload_len = data_size;
9243         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9244         memcpy((void *)cfg->payload,
9245                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9246                data_size);
9247         if (seq)
9248                 cfg->payload_seq = *seq;
9249         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9250         cfg->wake_len = wake_size;
9251         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9252         memcpy((void *)cfg->wake_data,
9253                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9254                wake_size);
9255         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9256                          data_size + wake_size;
9257         memcpy((void *)cfg->wake_mask,
9258                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9259                wake_mask_size);
9260         if (tok) {
9261                 cfg->tokens_size = tokens_size;
9262                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9263         }
9264
9265         trig->tcp = cfg;
9266
9267         return 0;
9268 }
9269
9270 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9271                                    const struct wiphy_wowlan_support *wowlan,
9272                                    struct nlattr *attr,
9273                                    struct cfg80211_wowlan *trig)
9274 {
9275         struct nlattr **tb;
9276         int err;
9277
9278         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9279         if (!tb)
9280                 return -ENOMEM;
9281
9282         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9283                 err = -EOPNOTSUPP;
9284                 goto out;
9285         }
9286
9287         err = nla_parse(tb, NL80211_ATTR_MAX,
9288                         nla_data(attr), nla_len(attr),
9289                         nl80211_policy);
9290         if (err)
9291                 goto out;
9292
9293         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9294         err = PTR_ERR_OR_ZERO(trig->nd_config);
9295         if (err)
9296                 trig->nd_config = NULL;
9297
9298 out:
9299         kfree(tb);
9300         return err;
9301 }
9302
9303 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9304 {
9305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9306         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9307         struct cfg80211_wowlan new_triggers = {};
9308         struct cfg80211_wowlan *ntrig;
9309         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9310         int err, i;
9311         bool prev_enabled = rdev->wiphy.wowlan_config;
9312         bool regular = false;
9313
9314         if (!wowlan)
9315                 return -EOPNOTSUPP;
9316
9317         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9318                 cfg80211_rdev_free_wowlan(rdev);
9319                 rdev->wiphy.wowlan_config = NULL;
9320                 goto set_wakeup;
9321         }
9322
9323         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9324                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9325                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9326                         nl80211_wowlan_policy);
9327         if (err)
9328                 return err;
9329
9330         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9331                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9332                         return -EINVAL;
9333                 new_triggers.any = true;
9334         }
9335
9336         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9337                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9338                         return -EINVAL;
9339                 new_triggers.disconnect = true;
9340                 regular = true;
9341         }
9342
9343         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9344                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9345                         return -EINVAL;
9346                 new_triggers.magic_pkt = true;
9347                 regular = true;
9348         }
9349
9350         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9351                 return -EINVAL;
9352
9353         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9354                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9355                         return -EINVAL;
9356                 new_triggers.gtk_rekey_failure = true;
9357                 regular = true;
9358         }
9359
9360         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9361                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9362                         return -EINVAL;
9363                 new_triggers.eap_identity_req = true;
9364                 regular = true;
9365         }
9366
9367         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9368                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9369                         return -EINVAL;
9370                 new_triggers.four_way_handshake = true;
9371                 regular = true;
9372         }
9373
9374         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9375                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9376                         return -EINVAL;
9377                 new_triggers.rfkill_release = true;
9378                 regular = true;
9379         }
9380
9381         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9382                 struct nlattr *pat;
9383                 int n_patterns = 0;
9384                 int rem, pat_len, mask_len, pkt_offset;
9385                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9386
9387                 regular = true;
9388
9389                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9390                                     rem)
9391                         n_patterns++;
9392                 if (n_patterns > wowlan->n_patterns)
9393                         return -EINVAL;
9394
9395                 new_triggers.patterns = kcalloc(n_patterns,
9396                                                 sizeof(new_triggers.patterns[0]),
9397                                                 GFP_KERNEL);
9398                 if (!new_triggers.patterns)
9399                         return -ENOMEM;
9400
9401                 new_triggers.n_patterns = n_patterns;
9402                 i = 0;
9403
9404                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9405                                     rem) {
9406                         u8 *mask_pat;
9407
9408                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9409                                   nla_len(pat), NULL);
9410                         err = -EINVAL;
9411                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9412                             !pat_tb[NL80211_PKTPAT_PATTERN])
9413                                 goto error;
9414                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9415                         mask_len = DIV_ROUND_UP(pat_len, 8);
9416                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9417                                 goto error;
9418                         if (pat_len > wowlan->pattern_max_len ||
9419                             pat_len < wowlan->pattern_min_len)
9420                                 goto error;
9421
9422                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9423                                 pkt_offset = 0;
9424                         else
9425                                 pkt_offset = nla_get_u32(
9426                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9427                         if (pkt_offset > wowlan->max_pkt_offset)
9428                                 goto error;
9429                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9430
9431                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9432                         if (!mask_pat) {
9433                                 err = -ENOMEM;
9434                                 goto error;
9435                         }
9436                         new_triggers.patterns[i].mask = mask_pat;
9437                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9438                                mask_len);
9439                         mask_pat += mask_len;
9440                         new_triggers.patterns[i].pattern = mask_pat;
9441                         new_triggers.patterns[i].pattern_len = pat_len;
9442                         memcpy(mask_pat,
9443                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9444                                pat_len);
9445                         i++;
9446                 }
9447         }
9448
9449         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9450                 regular = true;
9451                 err = nl80211_parse_wowlan_tcp(
9452                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9453                         &new_triggers);
9454                 if (err)
9455                         goto error;
9456         }
9457
9458         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9459                 regular = true;
9460                 err = nl80211_parse_wowlan_nd(
9461                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9462                         &new_triggers);
9463                 if (err)
9464                         goto error;
9465         }
9466
9467         /* The 'any' trigger means the device continues operating more or less
9468          * as in its normal operation mode and wakes up the host on most of the
9469          * normal interrupts (like packet RX, ...)
9470          * It therefore makes little sense to combine with the more constrained
9471          * wakeup trigger modes.
9472          */
9473         if (new_triggers.any && regular) {
9474                 err = -EINVAL;
9475                 goto error;
9476         }
9477
9478         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9479         if (!ntrig) {
9480                 err = -ENOMEM;
9481                 goto error;
9482         }
9483         cfg80211_rdev_free_wowlan(rdev);
9484         rdev->wiphy.wowlan_config = ntrig;
9485
9486  set_wakeup:
9487         if (rdev->ops->set_wakeup &&
9488             prev_enabled != !!rdev->wiphy.wowlan_config)
9489                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9490
9491         return 0;
9492  error:
9493         for (i = 0; i < new_triggers.n_patterns; i++)
9494                 kfree(new_triggers.patterns[i].mask);
9495         kfree(new_triggers.patterns);
9496         if (new_triggers.tcp && new_triggers.tcp->sock)
9497                 sock_release(new_triggers.tcp->sock);
9498         kfree(new_triggers.tcp);
9499         kfree(new_triggers.nd_config);
9500         return err;
9501 }
9502 #endif
9503
9504 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9505                                        struct cfg80211_registered_device *rdev)
9506 {
9507         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9508         int i, j, pat_len;
9509         struct cfg80211_coalesce_rules *rule;
9510
9511         if (!rdev->coalesce->n_rules)
9512                 return 0;
9513
9514         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9515         if (!nl_rules)
9516                 return -ENOBUFS;
9517
9518         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9519                 nl_rule = nla_nest_start(msg, i + 1);
9520                 if (!nl_rule)
9521                         return -ENOBUFS;
9522
9523                 rule = &rdev->coalesce->rules[i];
9524                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9525                                 rule->delay))
9526                         return -ENOBUFS;
9527
9528                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9529                                 rule->condition))
9530                         return -ENOBUFS;
9531
9532                 nl_pats = nla_nest_start(msg,
9533                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9534                 if (!nl_pats)
9535                         return -ENOBUFS;
9536
9537                 for (j = 0; j < rule->n_patterns; j++) {
9538                         nl_pat = nla_nest_start(msg, j + 1);
9539                         if (!nl_pat)
9540                                 return -ENOBUFS;
9541                         pat_len = rule->patterns[j].pattern_len;
9542                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9543                                     DIV_ROUND_UP(pat_len, 8),
9544                                     rule->patterns[j].mask) ||
9545                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9546                                     rule->patterns[j].pattern) ||
9547                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9548                                         rule->patterns[j].pkt_offset))
9549                                 return -ENOBUFS;
9550                         nla_nest_end(msg, nl_pat);
9551                 }
9552                 nla_nest_end(msg, nl_pats);
9553                 nla_nest_end(msg, nl_rule);
9554         }
9555         nla_nest_end(msg, nl_rules);
9556
9557         return 0;
9558 }
9559
9560 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9561 {
9562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9563         struct sk_buff *msg;
9564         void *hdr;
9565
9566         if (!rdev->wiphy.coalesce)
9567                 return -EOPNOTSUPP;
9568
9569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9570         if (!msg)
9571                 return -ENOMEM;
9572
9573         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9574                              NL80211_CMD_GET_COALESCE);
9575         if (!hdr)
9576                 goto nla_put_failure;
9577
9578         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9579                 goto nla_put_failure;
9580
9581         genlmsg_end(msg, hdr);
9582         return genlmsg_reply(msg, info);
9583
9584 nla_put_failure:
9585         nlmsg_free(msg);
9586         return -ENOBUFS;
9587 }
9588
9589 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9590 {
9591         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9592         int i, j;
9593         struct cfg80211_coalesce_rules *rule;
9594
9595         if (!coalesce)
9596                 return;
9597
9598         for (i = 0; i < coalesce->n_rules; i++) {
9599                 rule = &coalesce->rules[i];
9600                 for (j = 0; j < rule->n_patterns; j++)
9601                         kfree(rule->patterns[j].mask);
9602                 kfree(rule->patterns);
9603         }
9604         kfree(coalesce->rules);
9605         kfree(coalesce);
9606         rdev->coalesce = NULL;
9607 }
9608
9609 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9610                                        struct nlattr *rule,
9611                                        struct cfg80211_coalesce_rules *new_rule)
9612 {
9613         int err, i;
9614         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9615         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9616         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9617         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9618
9619         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9620                         nla_len(rule), nl80211_coalesce_policy);
9621         if (err)
9622                 return err;
9623
9624         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9625                 new_rule->delay =
9626                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9627         if (new_rule->delay > coalesce->max_delay)
9628                 return -EINVAL;
9629
9630         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9631                 new_rule->condition =
9632                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9633         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9634             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9635                 return -EINVAL;
9636
9637         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9638                 return -EINVAL;
9639
9640         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9641                             rem)
9642                 n_patterns++;
9643         if (n_patterns > coalesce->n_patterns)
9644                 return -EINVAL;
9645
9646         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9647                                      GFP_KERNEL);
9648         if (!new_rule->patterns)
9649                 return -ENOMEM;
9650
9651         new_rule->n_patterns = n_patterns;
9652         i = 0;
9653
9654         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9655                             rem) {
9656                 u8 *mask_pat;
9657
9658                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9659                           nla_len(pat), NULL);
9660                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9661                     !pat_tb[NL80211_PKTPAT_PATTERN])
9662                         return -EINVAL;
9663                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9664                 mask_len = DIV_ROUND_UP(pat_len, 8);
9665                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9666                         return -EINVAL;
9667                 if (pat_len > coalesce->pattern_max_len ||
9668                     pat_len < coalesce->pattern_min_len)
9669                         return -EINVAL;
9670
9671                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9672                         pkt_offset = 0;
9673                 else
9674                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9675                 if (pkt_offset > coalesce->max_pkt_offset)
9676                         return -EINVAL;
9677                 new_rule->patterns[i].pkt_offset = pkt_offset;
9678
9679                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9680                 if (!mask_pat)
9681                         return -ENOMEM;
9682
9683                 new_rule->patterns[i].mask = mask_pat;
9684                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9685                        mask_len);
9686
9687                 mask_pat += mask_len;
9688                 new_rule->patterns[i].pattern = mask_pat;
9689                 new_rule->patterns[i].pattern_len = pat_len;
9690                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9691                        pat_len);
9692                 i++;
9693         }
9694
9695         return 0;
9696 }
9697
9698 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9699 {
9700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9701         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9702         struct cfg80211_coalesce new_coalesce = {};
9703         struct cfg80211_coalesce *n_coalesce;
9704         int err, rem_rule, n_rules = 0, i, j;
9705         struct nlattr *rule;
9706         struct cfg80211_coalesce_rules *tmp_rule;
9707
9708         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9709                 return -EOPNOTSUPP;
9710
9711         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9712                 cfg80211_rdev_free_coalesce(rdev);
9713                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
9714                 return 0;
9715         }
9716
9717         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9718                             rem_rule)
9719                 n_rules++;
9720         if (n_rules > coalesce->n_rules)
9721                 return -EINVAL;
9722
9723         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9724                                      GFP_KERNEL);
9725         if (!new_coalesce.rules)
9726                 return -ENOMEM;
9727
9728         new_coalesce.n_rules = n_rules;
9729         i = 0;
9730
9731         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9732                             rem_rule) {
9733                 err = nl80211_parse_coalesce_rule(rdev, rule,
9734                                                   &new_coalesce.rules[i]);
9735                 if (err)
9736                         goto error;
9737
9738                 i++;
9739         }
9740
9741         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
9742         if (err)
9743                 goto error;
9744
9745         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9746         if (!n_coalesce) {
9747                 err = -ENOMEM;
9748                 goto error;
9749         }
9750         cfg80211_rdev_free_coalesce(rdev);
9751         rdev->coalesce = n_coalesce;
9752
9753         return 0;
9754 error:
9755         for (i = 0; i < new_coalesce.n_rules; i++) {
9756                 tmp_rule = &new_coalesce.rules[i];
9757                 for (j = 0; j < tmp_rule->n_patterns; j++)
9758                         kfree(tmp_rule->patterns[j].mask);
9759                 kfree(tmp_rule->patterns);
9760         }
9761         kfree(new_coalesce.rules);
9762
9763         return err;
9764 }
9765
9766 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9767 {
9768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9769         struct net_device *dev = info->user_ptr[1];
9770         struct wireless_dev *wdev = dev->ieee80211_ptr;
9771         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9772         struct cfg80211_gtk_rekey_data rekey_data;
9773         int err;
9774
9775         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9776                 return -EINVAL;
9777
9778         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9779                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9780                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9781                         nl80211_rekey_policy);
9782         if (err)
9783                 return err;
9784
9785         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9786                 return -ERANGE;
9787         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9788                 return -ERANGE;
9789         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9790                 return -ERANGE;
9791
9792         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9793         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9794         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9795
9796         wdev_lock(wdev);
9797         if (!wdev->current_bss) {
9798                 err = -ENOTCONN;
9799                 goto out;
9800         }
9801
9802         if (!rdev->ops->set_rekey_data) {
9803                 err = -EOPNOTSUPP;
9804                 goto out;
9805         }
9806
9807         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9808  out:
9809         wdev_unlock(wdev);
9810         return err;
9811 }
9812
9813 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9814                                              struct genl_info *info)
9815 {
9816         struct net_device *dev = info->user_ptr[1];
9817         struct wireless_dev *wdev = dev->ieee80211_ptr;
9818
9819         if (wdev->iftype != NL80211_IFTYPE_AP &&
9820             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9821                 return -EINVAL;
9822
9823         if (wdev->ap_unexpected_nlportid)
9824                 return -EBUSY;
9825
9826         wdev->ap_unexpected_nlportid = info->snd_portid;
9827         return 0;
9828 }
9829
9830 static int nl80211_probe_client(struct sk_buff *skb,
9831                                 struct genl_info *info)
9832 {
9833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9834         struct net_device *dev = info->user_ptr[1];
9835         struct wireless_dev *wdev = dev->ieee80211_ptr;
9836         struct sk_buff *msg;
9837         void *hdr;
9838         const u8 *addr;
9839         u64 cookie;
9840         int err;
9841
9842         if (wdev->iftype != NL80211_IFTYPE_AP &&
9843             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9844                 return -EOPNOTSUPP;
9845
9846         if (!info->attrs[NL80211_ATTR_MAC])
9847                 return -EINVAL;
9848
9849         if (!rdev->ops->probe_client)
9850                 return -EOPNOTSUPP;
9851
9852         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9853         if (!msg)
9854                 return -ENOMEM;
9855
9856         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9857                              NL80211_CMD_PROBE_CLIENT);
9858         if (!hdr) {
9859                 err = -ENOBUFS;
9860                 goto free_msg;
9861         }
9862
9863         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9864
9865         err = rdev_probe_client(rdev, dev, addr, &cookie);
9866         if (err)
9867                 goto free_msg;
9868
9869         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9870                 goto nla_put_failure;
9871
9872         genlmsg_end(msg, hdr);
9873
9874         return genlmsg_reply(msg, info);
9875
9876  nla_put_failure:
9877         err = -ENOBUFS;
9878  free_msg:
9879         nlmsg_free(msg);
9880         return err;
9881 }
9882
9883 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9884 {
9885         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9886         struct cfg80211_beacon_registration *reg, *nreg;
9887         int rv;
9888
9889         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9890                 return -EOPNOTSUPP;
9891
9892         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9893         if (!nreg)
9894                 return -ENOMEM;
9895
9896         /* First, check if already registered. */
9897         spin_lock_bh(&rdev->beacon_registrations_lock);
9898         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9899                 if (reg->nlportid == info->snd_portid) {
9900                         rv = -EALREADY;
9901                         goto out_err;
9902                 }
9903         }
9904         /* Add it to the list */
9905         nreg->nlportid = info->snd_portid;
9906         list_add(&nreg->list, &rdev->beacon_registrations);
9907
9908         spin_unlock_bh(&rdev->beacon_registrations_lock);
9909
9910         return 0;
9911 out_err:
9912         spin_unlock_bh(&rdev->beacon_registrations_lock);
9913         kfree(nreg);
9914         return rv;
9915 }
9916
9917 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9918 {
9919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9920         struct wireless_dev *wdev = info->user_ptr[1];
9921         int err;
9922
9923         if (!rdev->ops->start_p2p_device)
9924                 return -EOPNOTSUPP;
9925
9926         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9927                 return -EOPNOTSUPP;
9928
9929         if (wdev->p2p_started)
9930                 return 0;
9931
9932         if (rfkill_blocked(rdev->rfkill))
9933                 return -ERFKILL;
9934
9935         err = rdev_start_p2p_device(rdev, wdev);
9936         if (err)
9937                 return err;
9938
9939         wdev->p2p_started = true;
9940         rdev->opencount++;
9941
9942         return 0;
9943 }
9944
9945 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9946 {
9947         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9948         struct wireless_dev *wdev = info->user_ptr[1];
9949
9950         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9951                 return -EOPNOTSUPP;
9952
9953         if (!rdev->ops->stop_p2p_device)
9954                 return -EOPNOTSUPP;
9955
9956         cfg80211_stop_p2p_device(rdev, wdev);
9957
9958         return 0;
9959 }
9960
9961 static int nl80211_get_protocol_features(struct sk_buff *skb,
9962                                          struct genl_info *info)
9963 {
9964         void *hdr;
9965         struct sk_buff *msg;
9966
9967         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9968         if (!msg)
9969                 return -ENOMEM;
9970
9971         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9972                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9973         if (!hdr)
9974                 goto nla_put_failure;
9975
9976         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9977                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9978                 goto nla_put_failure;
9979
9980         genlmsg_end(msg, hdr);
9981         return genlmsg_reply(msg, info);
9982
9983  nla_put_failure:
9984         kfree_skb(msg);
9985         return -ENOBUFS;
9986 }
9987
9988 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9989 {
9990         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9991         struct cfg80211_update_ft_ies_params ft_params;
9992         struct net_device *dev = info->user_ptr[1];
9993
9994         if (!rdev->ops->update_ft_ies)
9995                 return -EOPNOTSUPP;
9996
9997         if (!info->attrs[NL80211_ATTR_MDID] ||
9998             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9999                 return -EINVAL;
10000
10001         memset(&ft_params, 0, sizeof(ft_params));
10002         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10003         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10004         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10005
10006         return rdev_update_ft_ies(rdev, dev, &ft_params);
10007 }
10008
10009 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10010                                        struct genl_info *info)
10011 {
10012         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10013         struct wireless_dev *wdev = info->user_ptr[1];
10014         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10015         u16 duration;
10016         int ret;
10017
10018         if (!rdev->ops->crit_proto_start)
10019                 return -EOPNOTSUPP;
10020
10021         if (WARN_ON(!rdev->ops->crit_proto_stop))
10022                 return -EINVAL;
10023
10024         if (rdev->crit_proto_nlportid)
10025                 return -EBUSY;
10026
10027         /* determine protocol if provided */
10028         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10029                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10030
10031         if (proto >= NUM_NL80211_CRIT_PROTO)
10032                 return -EINVAL;
10033
10034         /* timeout must be provided */
10035         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10036                 return -EINVAL;
10037
10038         duration =
10039                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10040
10041         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10042                 return -ERANGE;
10043
10044         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10045         if (!ret)
10046                 rdev->crit_proto_nlportid = info->snd_portid;
10047
10048         return ret;
10049 }
10050
10051 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10052                                       struct genl_info *info)
10053 {
10054         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10055         struct wireless_dev *wdev = info->user_ptr[1];
10056
10057         if (!rdev->ops->crit_proto_stop)
10058                 return -EOPNOTSUPP;
10059
10060         if (rdev->crit_proto_nlportid) {
10061                 rdev->crit_proto_nlportid = 0;
10062                 rdev_crit_proto_stop(rdev, wdev);
10063         }
10064         return 0;
10065 }
10066
10067 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10068 {
10069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10070         struct wireless_dev *wdev =
10071                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10072         int i, err;
10073         u32 vid, subcmd;
10074
10075         if (!rdev->wiphy.vendor_commands)
10076                 return -EOPNOTSUPP;
10077
10078         if (IS_ERR(wdev)) {
10079                 err = PTR_ERR(wdev);
10080                 if (err != -EINVAL)
10081                         return err;
10082                 wdev = NULL;
10083         } else if (wdev->wiphy != &rdev->wiphy) {
10084                 return -EINVAL;
10085         }
10086
10087         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10088             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10089                 return -EINVAL;
10090
10091         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10092         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10093         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10094                 const struct wiphy_vendor_command *vcmd;
10095                 void *data = NULL;
10096                 int len = 0;
10097
10098                 vcmd = &rdev->wiphy.vendor_commands[i];
10099
10100                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10101                         continue;
10102
10103                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10104                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10105                         if (!wdev)
10106                                 return -EINVAL;
10107                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10108                             !wdev->netdev)
10109                                 return -EINVAL;
10110
10111                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10112                                 if (wdev->netdev &&
10113                                     !netif_running(wdev->netdev))
10114                                         return -ENETDOWN;
10115                                 if (!wdev->netdev && !wdev->p2p_started)
10116                                         return -ENETDOWN;
10117                         }
10118
10119                         if (!vcmd->doit)
10120                                 return -EOPNOTSUPP;
10121                 } else {
10122                         wdev = NULL;
10123                 }
10124
10125                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10126                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10127                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10128                 }
10129
10130                 rdev->cur_cmd_info = info;
10131                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10132                                                           data, len);
10133                 rdev->cur_cmd_info = NULL;
10134                 return err;
10135         }
10136
10137         return -EOPNOTSUPP;
10138 }
10139
10140 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10141                                        struct netlink_callback *cb,
10142                                        struct cfg80211_registered_device **rdev,
10143                                        struct wireless_dev **wdev)
10144 {
10145         u32 vid, subcmd;
10146         unsigned int i;
10147         int vcmd_idx = -1;
10148         int err;
10149         void *data = NULL;
10150         unsigned int data_len = 0;
10151
10152         if (cb->args[0]) {
10153                 /* subtract the 1 again here */
10154                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10155                 struct wireless_dev *tmp;
10156
10157                 if (!wiphy)
10158                         return -ENODEV;
10159                 *rdev = wiphy_to_rdev(wiphy);
10160                 *wdev = NULL;
10161
10162                 if (cb->args[1]) {
10163                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10164                                 if (tmp->identifier == cb->args[1] - 1) {
10165                                         *wdev = tmp;
10166                                         break;
10167                                 }
10168                         }
10169                 }
10170
10171                 /* keep rtnl locked in successful case */
10172                 return 0;
10173         }
10174
10175         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10176                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10177                           nl80211_policy);
10178         if (err)
10179                 return err;
10180
10181         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10182             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD])
10183                 return -EINVAL;
10184
10185         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10186                                            nl80211_fam.attrbuf);
10187         if (IS_ERR(*wdev))
10188                 *wdev = NULL;
10189
10190         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10191                                            nl80211_fam.attrbuf);
10192         if (IS_ERR(*rdev))
10193                 return PTR_ERR(*rdev);
10194
10195         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10196         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10197
10198         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10199                 const struct wiphy_vendor_command *vcmd;
10200
10201                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10202
10203                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10204                         continue;
10205
10206                 if (!vcmd->dumpit)
10207                         return -EOPNOTSUPP;
10208
10209                 vcmd_idx = i;
10210                 break;
10211         }
10212
10213         if (vcmd_idx < 0)
10214                 return -EOPNOTSUPP;
10215
10216         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10217                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10218                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10219         }
10220
10221         /* 0 is the first index - add 1 to parse only once */
10222         cb->args[0] = (*rdev)->wiphy_idx + 1;
10223         /* add 1 to know if it was NULL */
10224         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10225         cb->args[2] = vcmd_idx;
10226         cb->args[3] = (unsigned long)data;
10227         cb->args[4] = data_len;
10228
10229         /* keep rtnl locked in successful case */
10230         return 0;
10231 }
10232
10233 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10234                                    struct netlink_callback *cb)
10235 {
10236         struct cfg80211_registered_device *rdev;
10237         struct wireless_dev *wdev;
10238         unsigned int vcmd_idx;
10239         const struct wiphy_vendor_command *vcmd;
10240         void *data;
10241         int data_len;
10242         int err;
10243         struct nlattr *vendor_data;
10244
10245         rtnl_lock();
10246         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10247         if (err)
10248                 goto out;
10249
10250         vcmd_idx = cb->args[2];
10251         data = (void *)cb->args[3];
10252         data_len = cb->args[4];
10253         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10254
10255         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10256                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10257                 if (!wdev) {
10258                         err = -EINVAL;
10259                         goto out;
10260                 }
10261                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10262                     !wdev->netdev) {
10263                         err = -EINVAL;
10264                         goto out;
10265                 }
10266
10267                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10268                         if (wdev->netdev &&
10269                             !netif_running(wdev->netdev)) {
10270                                 err = -ENETDOWN;
10271                                 goto out;
10272                         }
10273                         if (!wdev->netdev && !wdev->p2p_started) {
10274                                 err = -ENETDOWN;
10275                                 goto out;
10276                         }
10277                 }
10278         }
10279
10280         while (1) {
10281                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10282                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10283                                            NL80211_CMD_VENDOR);
10284                 if (!hdr)
10285                         break;
10286
10287                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10288                     (wdev && nla_put_u64(skb, NL80211_ATTR_WDEV,
10289                                          wdev_id(wdev)))) {
10290                         genlmsg_cancel(skb, hdr);
10291                         break;
10292                 }
10293
10294                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10295                 if (!vendor_data) {
10296                         genlmsg_cancel(skb, hdr);
10297                         break;
10298                 }
10299
10300                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10301                                    (unsigned long *)&cb->args[5]);
10302                 nla_nest_end(skb, vendor_data);
10303
10304                 if (err == -ENOBUFS || err == -ENOENT) {
10305                         genlmsg_cancel(skb, hdr);
10306                         break;
10307                 } else if (err) {
10308                         genlmsg_cancel(skb, hdr);
10309                         goto out;
10310                 }
10311
10312                 genlmsg_end(skb, hdr);
10313         }
10314
10315         err = skb->len;
10316  out:
10317         rtnl_unlock();
10318         return err;
10319 }
10320
10321 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10322                                            enum nl80211_commands cmd,
10323                                            enum nl80211_attrs attr,
10324                                            int approxlen)
10325 {
10326         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10327
10328         if (WARN_ON(!rdev->cur_cmd_info))
10329                 return NULL;
10330
10331         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10332                                            rdev->cur_cmd_info->snd_portid,
10333                                            rdev->cur_cmd_info->snd_seq,
10334                                            cmd, attr, NULL, GFP_KERNEL);
10335 }
10336 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10337
10338 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10339 {
10340         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10341         void *hdr = ((void **)skb->cb)[1];
10342         struct nlattr *data = ((void **)skb->cb)[2];
10343
10344         /* clear CB data for netlink core to own from now on */
10345         memset(skb->cb, 0, sizeof(skb->cb));
10346
10347         if (WARN_ON(!rdev->cur_cmd_info)) {
10348                 kfree_skb(skb);
10349                 return -EINVAL;
10350         }
10351
10352         nla_nest_end(skb, data);
10353         genlmsg_end(skb, hdr);
10354         return genlmsg_reply(skb, rdev->cur_cmd_info);
10355 }
10356 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10357
10358
10359 static int nl80211_set_qos_map(struct sk_buff *skb,
10360                                struct genl_info *info)
10361 {
10362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10363         struct cfg80211_qos_map *qos_map = NULL;
10364         struct net_device *dev = info->user_ptr[1];
10365         u8 *pos, len, num_des, des_len, des;
10366         int ret;
10367
10368         if (!rdev->ops->set_qos_map)
10369                 return -EOPNOTSUPP;
10370
10371         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10372                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10373                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10374
10375                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10376                     len > IEEE80211_QOS_MAP_LEN_MAX)
10377                         return -EINVAL;
10378
10379                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10380                 if (!qos_map)
10381                         return -ENOMEM;
10382
10383                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10384                 if (num_des) {
10385                         des_len = num_des *
10386                                 sizeof(struct cfg80211_dscp_exception);
10387                         memcpy(qos_map->dscp_exception, pos, des_len);
10388                         qos_map->num_des = num_des;
10389                         for (des = 0; des < num_des; des++) {
10390                                 if (qos_map->dscp_exception[des].up > 7) {
10391                                         kfree(qos_map);
10392                                         return -EINVAL;
10393                                 }
10394                         }
10395                         pos += des_len;
10396                 }
10397                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10398         }
10399
10400         wdev_lock(dev->ieee80211_ptr);
10401         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10402         if (!ret)
10403                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10404         wdev_unlock(dev->ieee80211_ptr);
10405
10406         kfree(qos_map);
10407         return ret;
10408 }
10409
10410 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10411 {
10412         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10413         struct net_device *dev = info->user_ptr[1];
10414         struct wireless_dev *wdev = dev->ieee80211_ptr;
10415         const u8 *peer;
10416         u8 tsid, up;
10417         u16 admitted_time = 0;
10418         int err;
10419
10420         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10421                 return -EOPNOTSUPP;
10422
10423         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10424             !info->attrs[NL80211_ATTR_USER_PRIO])
10425                 return -EINVAL;
10426
10427         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10428         if (tsid >= IEEE80211_NUM_TIDS)
10429                 return -EINVAL;
10430
10431         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10432         if (up >= IEEE80211_NUM_UPS)
10433                 return -EINVAL;
10434
10435         /* WMM uses TIDs 0-7 even for TSPEC */
10436         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10437                 /* TODO: handle 802.11 TSPEC/admission control
10438                  * need more attributes for that (e.g. BA session requirement);
10439                  * change the WMM adminssion test above to allow both then
10440                  */
10441                 return -EINVAL;
10442         }
10443
10444         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10445
10446         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10447                 admitted_time =
10448                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10449                 if (!admitted_time)
10450                         return -EINVAL;
10451         }
10452
10453         wdev_lock(wdev);
10454         switch (wdev->iftype) {
10455         case NL80211_IFTYPE_STATION:
10456         case NL80211_IFTYPE_P2P_CLIENT:
10457                 if (wdev->current_bss)
10458                         break;
10459                 err = -ENOTCONN;
10460                 goto out;
10461         default:
10462                 err = -EOPNOTSUPP;
10463                 goto out;
10464         }
10465
10466         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10467
10468  out:
10469         wdev_unlock(wdev);
10470         return err;
10471 }
10472
10473 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10474 {
10475         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10476         struct net_device *dev = info->user_ptr[1];
10477         struct wireless_dev *wdev = dev->ieee80211_ptr;
10478         const u8 *peer;
10479         u8 tsid;
10480         int err;
10481
10482         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10483                 return -EINVAL;
10484
10485         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10486         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10487
10488         wdev_lock(wdev);
10489         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10490         wdev_unlock(wdev);
10491
10492         return err;
10493 }
10494
10495 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10496                                        struct genl_info *info)
10497 {
10498         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10499         struct net_device *dev = info->user_ptr[1];
10500         struct wireless_dev *wdev = dev->ieee80211_ptr;
10501         struct cfg80211_chan_def chandef = {};
10502         const u8 *addr;
10503         u8 oper_class;
10504         int err;
10505
10506         if (!rdev->ops->tdls_channel_switch ||
10507             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10508                 return -EOPNOTSUPP;
10509
10510         switch (dev->ieee80211_ptr->iftype) {
10511         case NL80211_IFTYPE_STATION:
10512         case NL80211_IFTYPE_P2P_CLIENT:
10513                 break;
10514         default:
10515                 return -EOPNOTSUPP;
10516         }
10517
10518         if (!info->attrs[NL80211_ATTR_MAC] ||
10519             !info->attrs[NL80211_ATTR_OPER_CLASS])
10520                 return -EINVAL;
10521
10522         err = nl80211_parse_chandef(rdev, info, &chandef);
10523         if (err)
10524                 return err;
10525
10526         /*
10527          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10528          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10529          * specification is not defined for them.
10530          */
10531         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10532             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10533             chandef.width != NL80211_CHAN_WIDTH_20)
10534                 return -EINVAL;
10535
10536         /* we will be active on the TDLS link */
10537         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10538                                            wdev->iftype))
10539                 return -EINVAL;
10540
10541         /* don't allow switching to DFS channels */
10542         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10543                 return -EINVAL;
10544
10545         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10546         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10547
10548         wdev_lock(wdev);
10549         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10550         wdev_unlock(wdev);
10551
10552         return err;
10553 }
10554
10555 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10556                                               struct genl_info *info)
10557 {
10558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10559         struct net_device *dev = info->user_ptr[1];
10560         struct wireless_dev *wdev = dev->ieee80211_ptr;
10561         const u8 *addr;
10562
10563         if (!rdev->ops->tdls_channel_switch ||
10564             !rdev->ops->tdls_cancel_channel_switch ||
10565             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10566                 return -EOPNOTSUPP;
10567
10568         switch (dev->ieee80211_ptr->iftype) {
10569         case NL80211_IFTYPE_STATION:
10570         case NL80211_IFTYPE_P2P_CLIENT:
10571                 break;
10572         default:
10573                 return -EOPNOTSUPP;
10574         }
10575
10576         if (!info->attrs[NL80211_ATTR_MAC])
10577                 return -EINVAL;
10578
10579         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10580
10581         wdev_lock(wdev);
10582         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10583         wdev_unlock(wdev);
10584
10585         return 0;
10586 }
10587
10588 #define NL80211_FLAG_NEED_WIPHY         0x01
10589 #define NL80211_FLAG_NEED_NETDEV        0x02
10590 #define NL80211_FLAG_NEED_RTNL          0x04
10591 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10592 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10593                                          NL80211_FLAG_CHECK_NETDEV_UP)
10594 #define NL80211_FLAG_NEED_WDEV          0x10
10595 /* If a netdev is associated, it must be UP, P2P must be started */
10596 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10597                                          NL80211_FLAG_CHECK_NETDEV_UP)
10598 #define NL80211_FLAG_CLEAR_SKB          0x20
10599
10600 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10601                             struct genl_info *info)
10602 {
10603         struct cfg80211_registered_device *rdev;
10604         struct wireless_dev *wdev;
10605         struct net_device *dev;
10606         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10607
10608         if (rtnl)
10609                 rtnl_lock();
10610
10611         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10612                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10613                 if (IS_ERR(rdev)) {
10614                         if (rtnl)
10615                                 rtnl_unlock();
10616                         return PTR_ERR(rdev);
10617                 }
10618                 info->user_ptr[0] = rdev;
10619         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10620                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10621                 ASSERT_RTNL();
10622
10623                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10624                                                   info->attrs);
10625                 if (IS_ERR(wdev)) {
10626                         if (rtnl)
10627                                 rtnl_unlock();
10628                         return PTR_ERR(wdev);
10629                 }
10630
10631                 dev = wdev->netdev;
10632                 rdev = wiphy_to_rdev(wdev->wiphy);
10633
10634                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10635                         if (!dev) {
10636                                 if (rtnl)
10637                                         rtnl_unlock();
10638                                 return -EINVAL;
10639                         }
10640
10641                         info->user_ptr[1] = dev;
10642                 } else {
10643                         info->user_ptr[1] = wdev;
10644                 }
10645
10646                 if (dev) {
10647                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10648                             !netif_running(dev)) {
10649                                 if (rtnl)
10650                                         rtnl_unlock();
10651                                 return -ENETDOWN;
10652                         }
10653
10654                         dev_hold(dev);
10655                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10656                         if (!wdev->p2p_started) {
10657                                 if (rtnl)
10658                                         rtnl_unlock();
10659                                 return -ENETDOWN;
10660                         }
10661                 }
10662
10663                 info->user_ptr[0] = rdev;
10664         }
10665
10666         return 0;
10667 }
10668
10669 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10670                               struct genl_info *info)
10671 {
10672         if (info->user_ptr[1]) {
10673                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10674                         struct wireless_dev *wdev = info->user_ptr[1];
10675
10676                         if (wdev->netdev)
10677                                 dev_put(wdev->netdev);
10678                 } else {
10679                         dev_put(info->user_ptr[1]);
10680                 }
10681         }
10682
10683         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10684                 rtnl_unlock();
10685
10686         /* If needed, clear the netlink message payload from the SKB
10687          * as it might contain key data that shouldn't stick around on
10688          * the heap after the SKB is freed. The netlink message header
10689          * is still needed for further processing, so leave it intact.
10690          */
10691         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10692                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10693
10694                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10695         }
10696 }
10697
10698 static const struct genl_ops nl80211_ops[] = {
10699         {
10700                 .cmd = NL80211_CMD_GET_WIPHY,
10701                 .doit = nl80211_get_wiphy,
10702                 .dumpit = nl80211_dump_wiphy,
10703                 .done = nl80211_dump_wiphy_done,
10704                 .policy = nl80211_policy,
10705                 /* can be retrieved by unprivileged users */
10706                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10707                                   NL80211_FLAG_NEED_RTNL,
10708         },
10709         {
10710                 .cmd = NL80211_CMD_SET_WIPHY,
10711                 .doit = nl80211_set_wiphy,
10712                 .policy = nl80211_policy,
10713                 .flags = GENL_ADMIN_PERM,
10714                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10715         },
10716         {
10717                 .cmd = NL80211_CMD_GET_INTERFACE,
10718                 .doit = nl80211_get_interface,
10719                 .dumpit = nl80211_dump_interface,
10720                 .policy = nl80211_policy,
10721                 /* can be retrieved by unprivileged users */
10722                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10723                                   NL80211_FLAG_NEED_RTNL,
10724         },
10725         {
10726                 .cmd = NL80211_CMD_SET_INTERFACE,
10727                 .doit = nl80211_set_interface,
10728                 .policy = nl80211_policy,
10729                 .flags = GENL_ADMIN_PERM,
10730                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10731                                   NL80211_FLAG_NEED_RTNL,
10732         },
10733         {
10734                 .cmd = NL80211_CMD_NEW_INTERFACE,
10735                 .doit = nl80211_new_interface,
10736                 .policy = nl80211_policy,
10737                 .flags = GENL_ADMIN_PERM,
10738                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10739                                   NL80211_FLAG_NEED_RTNL,
10740         },
10741         {
10742                 .cmd = NL80211_CMD_DEL_INTERFACE,
10743                 .doit = nl80211_del_interface,
10744                 .policy = nl80211_policy,
10745                 .flags = GENL_ADMIN_PERM,
10746                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10747                                   NL80211_FLAG_NEED_RTNL,
10748         },
10749         {
10750                 .cmd = NL80211_CMD_GET_KEY,
10751                 .doit = nl80211_get_key,
10752                 .policy = nl80211_policy,
10753                 .flags = GENL_ADMIN_PERM,
10754                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10755                                   NL80211_FLAG_NEED_RTNL,
10756         },
10757         {
10758                 .cmd = NL80211_CMD_SET_KEY,
10759                 .doit = nl80211_set_key,
10760                 .policy = nl80211_policy,
10761                 .flags = GENL_ADMIN_PERM,
10762                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10763                                   NL80211_FLAG_NEED_RTNL |
10764                                   NL80211_FLAG_CLEAR_SKB,
10765         },
10766         {
10767                 .cmd = NL80211_CMD_NEW_KEY,
10768                 .doit = nl80211_new_key,
10769                 .policy = nl80211_policy,
10770                 .flags = GENL_ADMIN_PERM,
10771                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10772                                   NL80211_FLAG_NEED_RTNL |
10773                                   NL80211_FLAG_CLEAR_SKB,
10774         },
10775         {
10776                 .cmd = NL80211_CMD_DEL_KEY,
10777                 .doit = nl80211_del_key,
10778                 .policy = nl80211_policy,
10779                 .flags = GENL_ADMIN_PERM,
10780                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10781                                   NL80211_FLAG_NEED_RTNL,
10782         },
10783         {
10784                 .cmd = NL80211_CMD_SET_BEACON,
10785                 .policy = nl80211_policy,
10786                 .flags = GENL_ADMIN_PERM,
10787                 .doit = nl80211_set_beacon,
10788                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10789                                   NL80211_FLAG_NEED_RTNL,
10790         },
10791         {
10792                 .cmd = NL80211_CMD_START_AP,
10793                 .policy = nl80211_policy,
10794                 .flags = GENL_ADMIN_PERM,
10795                 .doit = nl80211_start_ap,
10796                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10797                                   NL80211_FLAG_NEED_RTNL,
10798         },
10799         {
10800                 .cmd = NL80211_CMD_STOP_AP,
10801                 .policy = nl80211_policy,
10802                 .flags = GENL_ADMIN_PERM,
10803                 .doit = nl80211_stop_ap,
10804                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10805                                   NL80211_FLAG_NEED_RTNL,
10806         },
10807         {
10808                 .cmd = NL80211_CMD_GET_STATION,
10809                 .doit = nl80211_get_station,
10810                 .dumpit = nl80211_dump_station,
10811                 .policy = nl80211_policy,
10812                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10813                                   NL80211_FLAG_NEED_RTNL,
10814         },
10815         {
10816                 .cmd = NL80211_CMD_SET_STATION,
10817                 .doit = nl80211_set_station,
10818                 .policy = nl80211_policy,
10819                 .flags = GENL_ADMIN_PERM,
10820                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10821                                   NL80211_FLAG_NEED_RTNL,
10822         },
10823         {
10824                 .cmd = NL80211_CMD_NEW_STATION,
10825                 .doit = nl80211_new_station,
10826                 .policy = nl80211_policy,
10827                 .flags = GENL_ADMIN_PERM,
10828                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10829                                   NL80211_FLAG_NEED_RTNL,
10830         },
10831         {
10832                 .cmd = NL80211_CMD_DEL_STATION,
10833                 .doit = nl80211_del_station,
10834                 .policy = nl80211_policy,
10835                 .flags = GENL_ADMIN_PERM,
10836                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10837                                   NL80211_FLAG_NEED_RTNL,
10838         },
10839         {
10840                 .cmd = NL80211_CMD_GET_MPATH,
10841                 .doit = nl80211_get_mpath,
10842                 .dumpit = nl80211_dump_mpath,
10843                 .policy = nl80211_policy,
10844                 .flags = GENL_ADMIN_PERM,
10845                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10846                                   NL80211_FLAG_NEED_RTNL,
10847         },
10848         {
10849                 .cmd = NL80211_CMD_GET_MPP,
10850                 .doit = nl80211_get_mpp,
10851                 .dumpit = nl80211_dump_mpp,
10852                 .policy = nl80211_policy,
10853                 .flags = GENL_ADMIN_PERM,
10854                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10855                                   NL80211_FLAG_NEED_RTNL,
10856         },
10857         {
10858                 .cmd = NL80211_CMD_SET_MPATH,
10859                 .doit = nl80211_set_mpath,
10860                 .policy = nl80211_policy,
10861                 .flags = GENL_ADMIN_PERM,
10862                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10863                                   NL80211_FLAG_NEED_RTNL,
10864         },
10865         {
10866                 .cmd = NL80211_CMD_NEW_MPATH,
10867                 .doit = nl80211_new_mpath,
10868                 .policy = nl80211_policy,
10869                 .flags = GENL_ADMIN_PERM,
10870                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10871                                   NL80211_FLAG_NEED_RTNL,
10872         },
10873         {
10874                 .cmd = NL80211_CMD_DEL_MPATH,
10875                 .doit = nl80211_del_mpath,
10876                 .policy = nl80211_policy,
10877                 .flags = GENL_ADMIN_PERM,
10878                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10879                                   NL80211_FLAG_NEED_RTNL,
10880         },
10881         {
10882                 .cmd = NL80211_CMD_SET_BSS,
10883                 .doit = nl80211_set_bss,
10884                 .policy = nl80211_policy,
10885                 .flags = GENL_ADMIN_PERM,
10886                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10887                                   NL80211_FLAG_NEED_RTNL,
10888         },
10889         {
10890                 .cmd = NL80211_CMD_GET_REG,
10891                 .doit = nl80211_get_reg_do,
10892                 .dumpit = nl80211_get_reg_dump,
10893                 .policy = nl80211_policy,
10894                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10895                 /* can be retrieved by unprivileged users */
10896         },
10897 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
10898         {
10899                 .cmd = NL80211_CMD_SET_REG,
10900                 .doit = nl80211_set_reg,
10901                 .policy = nl80211_policy,
10902                 .flags = GENL_ADMIN_PERM,
10903                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10904         },
10905 #endif
10906         {
10907                 .cmd = NL80211_CMD_REQ_SET_REG,
10908                 .doit = nl80211_req_set_reg,
10909                 .policy = nl80211_policy,
10910                 .flags = GENL_ADMIN_PERM,
10911         },
10912         {
10913                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10914                 .doit = nl80211_get_mesh_config,
10915                 .policy = nl80211_policy,
10916                 /* can be retrieved by unprivileged users */
10917                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10918                                   NL80211_FLAG_NEED_RTNL,
10919         },
10920         {
10921                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10922                 .doit = nl80211_update_mesh_config,
10923                 .policy = nl80211_policy,
10924                 .flags = GENL_ADMIN_PERM,
10925                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10926                                   NL80211_FLAG_NEED_RTNL,
10927         },
10928         {
10929                 .cmd = NL80211_CMD_TRIGGER_SCAN,
10930                 .doit = nl80211_trigger_scan,
10931                 .policy = nl80211_policy,
10932                 .flags = GENL_ADMIN_PERM,
10933                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10934                                   NL80211_FLAG_NEED_RTNL,
10935         },
10936         {
10937                 .cmd = NL80211_CMD_GET_SCAN,
10938                 .policy = nl80211_policy,
10939                 .dumpit = nl80211_dump_scan,
10940         },
10941         {
10942                 .cmd = NL80211_CMD_START_SCHED_SCAN,
10943                 .doit = nl80211_start_sched_scan,
10944                 .policy = nl80211_policy,
10945                 .flags = GENL_ADMIN_PERM,
10946                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10947                                   NL80211_FLAG_NEED_RTNL,
10948         },
10949         {
10950                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
10951                 .doit = nl80211_stop_sched_scan,
10952                 .policy = nl80211_policy,
10953                 .flags = GENL_ADMIN_PERM,
10954                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10955                                   NL80211_FLAG_NEED_RTNL,
10956         },
10957         {
10958                 .cmd = NL80211_CMD_AUTHENTICATE,
10959                 .doit = nl80211_authenticate,
10960                 .policy = nl80211_policy,
10961                 .flags = GENL_ADMIN_PERM,
10962                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10963                                   NL80211_FLAG_NEED_RTNL |
10964                                   NL80211_FLAG_CLEAR_SKB,
10965         },
10966         {
10967                 .cmd = NL80211_CMD_ASSOCIATE,
10968                 .doit = nl80211_associate,
10969                 .policy = nl80211_policy,
10970                 .flags = GENL_ADMIN_PERM,
10971                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10972                                   NL80211_FLAG_NEED_RTNL,
10973         },
10974         {
10975                 .cmd = NL80211_CMD_DEAUTHENTICATE,
10976                 .doit = nl80211_deauthenticate,
10977                 .policy = nl80211_policy,
10978                 .flags = GENL_ADMIN_PERM,
10979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10980                                   NL80211_FLAG_NEED_RTNL,
10981         },
10982         {
10983                 .cmd = NL80211_CMD_DISASSOCIATE,
10984                 .doit = nl80211_disassociate,
10985                 .policy = nl80211_policy,
10986                 .flags = GENL_ADMIN_PERM,
10987                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10988                                   NL80211_FLAG_NEED_RTNL,
10989         },
10990         {
10991                 .cmd = NL80211_CMD_JOIN_IBSS,
10992                 .doit = nl80211_join_ibss,
10993                 .policy = nl80211_policy,
10994                 .flags = GENL_ADMIN_PERM,
10995                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10996                                   NL80211_FLAG_NEED_RTNL,
10997         },
10998         {
10999                 .cmd = NL80211_CMD_LEAVE_IBSS,
11000                 .doit = nl80211_leave_ibss,
11001                 .policy = nl80211_policy,
11002                 .flags = GENL_ADMIN_PERM,
11003                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11004                                   NL80211_FLAG_NEED_RTNL,
11005         },
11006 #ifdef CONFIG_NL80211_TESTMODE
11007         {
11008                 .cmd = NL80211_CMD_TESTMODE,
11009                 .doit = nl80211_testmode_do,
11010                 .dumpit = nl80211_testmode_dump,
11011                 .policy = nl80211_policy,
11012                 .flags = GENL_ADMIN_PERM,
11013                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11014                                   NL80211_FLAG_NEED_RTNL,
11015         },
11016 #endif
11017         {
11018                 .cmd = NL80211_CMD_CONNECT,
11019                 .doit = nl80211_connect,
11020                 .policy = nl80211_policy,
11021                 .flags = GENL_ADMIN_PERM,
11022                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11023                                   NL80211_FLAG_NEED_RTNL,
11024         },
11025         {
11026                 .cmd = NL80211_CMD_DISCONNECT,
11027                 .doit = nl80211_disconnect,
11028                 .policy = nl80211_policy,
11029                 .flags = GENL_ADMIN_PERM,
11030                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11031                                   NL80211_FLAG_NEED_RTNL,
11032         },
11033         {
11034                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11035                 .doit = nl80211_wiphy_netns,
11036                 .policy = nl80211_policy,
11037                 .flags = GENL_ADMIN_PERM,
11038                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11039                                   NL80211_FLAG_NEED_RTNL,
11040         },
11041         {
11042                 .cmd = NL80211_CMD_GET_SURVEY,
11043                 .policy = nl80211_policy,
11044                 .dumpit = nl80211_dump_survey,
11045         },
11046         {
11047                 .cmd = NL80211_CMD_SET_PMKSA,
11048                 .doit = nl80211_setdel_pmksa,
11049                 .policy = nl80211_policy,
11050                 .flags = GENL_ADMIN_PERM,
11051                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11052                                   NL80211_FLAG_NEED_RTNL,
11053         },
11054         {
11055                 .cmd = NL80211_CMD_DEL_PMKSA,
11056                 .doit = nl80211_setdel_pmksa,
11057                 .policy = nl80211_policy,
11058                 .flags = GENL_ADMIN_PERM,
11059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11060                                   NL80211_FLAG_NEED_RTNL,
11061         },
11062         {
11063                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11064                 .doit = nl80211_flush_pmksa,
11065                 .policy = nl80211_policy,
11066                 .flags = GENL_ADMIN_PERM,
11067                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11068                                   NL80211_FLAG_NEED_RTNL,
11069         },
11070         {
11071                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11072                 .doit = nl80211_remain_on_channel,
11073                 .policy = nl80211_policy,
11074                 .flags = GENL_ADMIN_PERM,
11075                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11076                                   NL80211_FLAG_NEED_RTNL,
11077         },
11078         {
11079                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11080                 .doit = nl80211_cancel_remain_on_channel,
11081                 .policy = nl80211_policy,
11082                 .flags = GENL_ADMIN_PERM,
11083                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11084                                   NL80211_FLAG_NEED_RTNL,
11085         },
11086         {
11087                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11088                 .doit = nl80211_set_tx_bitrate_mask,
11089                 .policy = nl80211_policy,
11090                 .flags = GENL_ADMIN_PERM,
11091                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11092                                   NL80211_FLAG_NEED_RTNL,
11093         },
11094         {
11095                 .cmd = NL80211_CMD_REGISTER_FRAME,
11096                 .doit = nl80211_register_mgmt,
11097                 .policy = nl80211_policy,
11098                 .flags = GENL_ADMIN_PERM,
11099                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11100                                   NL80211_FLAG_NEED_RTNL,
11101         },
11102         {
11103                 .cmd = NL80211_CMD_FRAME,
11104                 .doit = nl80211_tx_mgmt,
11105                 .policy = nl80211_policy,
11106                 .flags = GENL_ADMIN_PERM,
11107                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11108                                   NL80211_FLAG_NEED_RTNL,
11109         },
11110         {
11111                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11112                 .doit = nl80211_tx_mgmt_cancel_wait,
11113                 .policy = nl80211_policy,
11114                 .flags = GENL_ADMIN_PERM,
11115                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11116                                   NL80211_FLAG_NEED_RTNL,
11117         },
11118         {
11119                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11120                 .doit = nl80211_set_power_save,
11121                 .policy = nl80211_policy,
11122                 .flags = GENL_ADMIN_PERM,
11123                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11124                                   NL80211_FLAG_NEED_RTNL,
11125         },
11126         {
11127                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11128                 .doit = nl80211_get_power_save,
11129                 .policy = nl80211_policy,
11130                 /* can be retrieved by unprivileged users */
11131                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11132                                   NL80211_FLAG_NEED_RTNL,
11133         },
11134         {
11135                 .cmd = NL80211_CMD_SET_CQM,
11136                 .doit = nl80211_set_cqm,
11137                 .policy = nl80211_policy,
11138                 .flags = GENL_ADMIN_PERM,
11139                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11140                                   NL80211_FLAG_NEED_RTNL,
11141         },
11142         {
11143                 .cmd = NL80211_CMD_SET_CHANNEL,
11144                 .doit = nl80211_set_channel,
11145                 .policy = nl80211_policy,
11146                 .flags = GENL_ADMIN_PERM,
11147                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11148                                   NL80211_FLAG_NEED_RTNL,
11149         },
11150         {
11151                 .cmd = NL80211_CMD_SET_WDS_PEER,
11152                 .doit = nl80211_set_wds_peer,
11153                 .policy = nl80211_policy,
11154                 .flags = GENL_ADMIN_PERM,
11155                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11156                                   NL80211_FLAG_NEED_RTNL,
11157         },
11158         {
11159                 .cmd = NL80211_CMD_JOIN_MESH,
11160                 .doit = nl80211_join_mesh,
11161                 .policy = nl80211_policy,
11162                 .flags = GENL_ADMIN_PERM,
11163                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11164                                   NL80211_FLAG_NEED_RTNL,
11165         },
11166         {
11167                 .cmd = NL80211_CMD_LEAVE_MESH,
11168                 .doit = nl80211_leave_mesh,
11169                 .policy = nl80211_policy,
11170                 .flags = GENL_ADMIN_PERM,
11171                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11172                                   NL80211_FLAG_NEED_RTNL,
11173         },
11174         {
11175                 .cmd = NL80211_CMD_JOIN_OCB,
11176                 .doit = nl80211_join_ocb,
11177                 .policy = nl80211_policy,
11178                 .flags = GENL_ADMIN_PERM,
11179                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11180                                   NL80211_FLAG_NEED_RTNL,
11181         },
11182         {
11183                 .cmd = NL80211_CMD_LEAVE_OCB,
11184                 .doit = nl80211_leave_ocb,
11185                 .policy = nl80211_policy,
11186                 .flags = GENL_ADMIN_PERM,
11187                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11188                                   NL80211_FLAG_NEED_RTNL,
11189         },
11190 #ifdef CONFIG_PM
11191         {
11192                 .cmd = NL80211_CMD_GET_WOWLAN,
11193                 .doit = nl80211_get_wowlan,
11194                 .policy = nl80211_policy,
11195                 /* can be retrieved by unprivileged users */
11196                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11197                                   NL80211_FLAG_NEED_RTNL,
11198         },
11199         {
11200                 .cmd = NL80211_CMD_SET_WOWLAN,
11201                 .doit = nl80211_set_wowlan,
11202                 .policy = nl80211_policy,
11203                 .flags = GENL_ADMIN_PERM,
11204                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11205                                   NL80211_FLAG_NEED_RTNL,
11206         },
11207 #endif
11208         {
11209                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11210                 .doit = nl80211_set_rekey_data,
11211                 .policy = nl80211_policy,
11212                 .flags = GENL_ADMIN_PERM,
11213                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11214                                   NL80211_FLAG_NEED_RTNL |
11215                                   NL80211_FLAG_CLEAR_SKB,
11216         },
11217         {
11218                 .cmd = NL80211_CMD_TDLS_MGMT,
11219                 .doit = nl80211_tdls_mgmt,
11220                 .policy = nl80211_policy,
11221                 .flags = GENL_ADMIN_PERM,
11222                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11223                                   NL80211_FLAG_NEED_RTNL,
11224         },
11225         {
11226                 .cmd = NL80211_CMD_TDLS_OPER,
11227                 .doit = nl80211_tdls_oper,
11228                 .policy = nl80211_policy,
11229                 .flags = GENL_ADMIN_PERM,
11230                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11231                                   NL80211_FLAG_NEED_RTNL,
11232         },
11233         {
11234                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11235                 .doit = nl80211_register_unexpected_frame,
11236                 .policy = nl80211_policy,
11237                 .flags = GENL_ADMIN_PERM,
11238                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11239                                   NL80211_FLAG_NEED_RTNL,
11240         },
11241         {
11242                 .cmd = NL80211_CMD_PROBE_CLIENT,
11243                 .doit = nl80211_probe_client,
11244                 .policy = nl80211_policy,
11245                 .flags = GENL_ADMIN_PERM,
11246                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11247                                   NL80211_FLAG_NEED_RTNL,
11248         },
11249         {
11250                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11251                 .doit = nl80211_register_beacons,
11252                 .policy = nl80211_policy,
11253                 .flags = GENL_ADMIN_PERM,
11254                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11255                                   NL80211_FLAG_NEED_RTNL,
11256         },
11257         {
11258                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11259                 .doit = nl80211_set_noack_map,
11260                 .policy = nl80211_policy,
11261                 .flags = GENL_ADMIN_PERM,
11262                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11263                                   NL80211_FLAG_NEED_RTNL,
11264         },
11265         {
11266                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11267                 .doit = nl80211_start_p2p_device,
11268                 .policy = nl80211_policy,
11269                 .flags = GENL_ADMIN_PERM,
11270                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11271                                   NL80211_FLAG_NEED_RTNL,
11272         },
11273         {
11274                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11275                 .doit = nl80211_stop_p2p_device,
11276                 .policy = nl80211_policy,
11277                 .flags = GENL_ADMIN_PERM,
11278                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11279                                   NL80211_FLAG_NEED_RTNL,
11280         },
11281         {
11282                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11283                 .doit = nl80211_set_mcast_rate,
11284                 .policy = nl80211_policy,
11285                 .flags = GENL_ADMIN_PERM,
11286                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11287                                   NL80211_FLAG_NEED_RTNL,
11288         },
11289         {
11290                 .cmd = NL80211_CMD_SET_MAC_ACL,
11291                 .doit = nl80211_set_mac_acl,
11292                 .policy = nl80211_policy,
11293                 .flags = GENL_ADMIN_PERM,
11294                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11295                                   NL80211_FLAG_NEED_RTNL,
11296         },
11297         {
11298                 .cmd = NL80211_CMD_RADAR_DETECT,
11299                 .doit = nl80211_start_radar_detection,
11300                 .policy = nl80211_policy,
11301                 .flags = GENL_ADMIN_PERM,
11302                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11303                                   NL80211_FLAG_NEED_RTNL,
11304         },
11305         {
11306                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11307                 .doit = nl80211_get_protocol_features,
11308                 .policy = nl80211_policy,
11309         },
11310         {
11311                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11312                 .doit = nl80211_update_ft_ies,
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_CRIT_PROTOCOL_START,
11320                 .doit = nl80211_crit_protocol_start,
11321                 .policy = nl80211_policy,
11322                 .flags = GENL_ADMIN_PERM,
11323                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11324                                   NL80211_FLAG_NEED_RTNL,
11325         },
11326         {
11327                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11328                 .doit = nl80211_crit_protocol_stop,
11329                 .policy = nl80211_policy,
11330                 .flags = GENL_ADMIN_PERM,
11331                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11332                                   NL80211_FLAG_NEED_RTNL,
11333         },
11334         {
11335                 .cmd = NL80211_CMD_GET_COALESCE,
11336                 .doit = nl80211_get_coalesce,
11337                 .policy = nl80211_policy,
11338                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11339                                   NL80211_FLAG_NEED_RTNL,
11340         },
11341         {
11342                 .cmd = NL80211_CMD_SET_COALESCE,
11343                 .doit = nl80211_set_coalesce,
11344                 .policy = nl80211_policy,
11345                 .flags = GENL_ADMIN_PERM,
11346                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11347                                   NL80211_FLAG_NEED_RTNL,
11348         },
11349         {
11350                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11351                 .doit = nl80211_channel_switch,
11352                 .policy = nl80211_policy,
11353                 .flags = GENL_ADMIN_PERM,
11354                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11355                                   NL80211_FLAG_NEED_RTNL,
11356         },
11357         {
11358                 .cmd = NL80211_CMD_VENDOR,
11359                 .doit = nl80211_vendor_cmd,
11360                 .dumpit = nl80211_vendor_cmd_dump,
11361                 .policy = nl80211_policy,
11362                 .flags = GENL_ADMIN_PERM,
11363                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11364                                   NL80211_FLAG_NEED_RTNL,
11365         },
11366         {
11367                 .cmd = NL80211_CMD_SET_QOS_MAP,
11368                 .doit = nl80211_set_qos_map,
11369                 .policy = nl80211_policy,
11370                 .flags = GENL_ADMIN_PERM,
11371                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11372                                   NL80211_FLAG_NEED_RTNL,
11373         },
11374         {
11375                 .cmd = NL80211_CMD_ADD_TX_TS,
11376                 .doit = nl80211_add_tx_ts,
11377                 .policy = nl80211_policy,
11378                 .flags = GENL_ADMIN_PERM,
11379                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11380                                   NL80211_FLAG_NEED_RTNL,
11381         },
11382         {
11383                 .cmd = NL80211_CMD_DEL_TX_TS,
11384                 .doit = nl80211_del_tx_ts,
11385                 .policy = nl80211_policy,
11386                 .flags = GENL_ADMIN_PERM,
11387                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11388                                   NL80211_FLAG_NEED_RTNL,
11389         },
11390         {
11391                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11392                 .doit = nl80211_tdls_channel_switch,
11393                 .policy = nl80211_policy,
11394                 .flags = GENL_ADMIN_PERM,
11395                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11396                                   NL80211_FLAG_NEED_RTNL,
11397         },
11398         {
11399                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11400                 .doit = nl80211_tdls_cancel_channel_switch,
11401                 .policy = nl80211_policy,
11402                 .flags = GENL_ADMIN_PERM,
11403                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11404                                   NL80211_FLAG_NEED_RTNL,
11405         },
11406 };
11407
11408 /* notification functions */
11409
11410 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11411                           enum nl80211_commands cmd)
11412 {
11413         struct sk_buff *msg;
11414         struct nl80211_dump_wiphy_state state = {};
11415
11416         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11417                 cmd != NL80211_CMD_DEL_WIPHY);
11418
11419         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11420         if (!msg)
11421                 return;
11422
11423         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11424                 nlmsg_free(msg);
11425                 return;
11426         }
11427
11428         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11429                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11430 }
11431
11432 static int nl80211_add_scan_req(struct sk_buff *msg,
11433                                 struct cfg80211_registered_device *rdev)
11434 {
11435         struct cfg80211_scan_request *req = rdev->scan_req;
11436         struct nlattr *nest;
11437         int i;
11438
11439         if (WARN_ON(!req))
11440                 return 0;
11441
11442         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11443         if (!nest)
11444                 goto nla_put_failure;
11445         for (i = 0; i < req->n_ssids; i++) {
11446                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11447                         goto nla_put_failure;
11448         }
11449         nla_nest_end(msg, nest);
11450
11451         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11452         if (!nest)
11453                 goto nla_put_failure;
11454         for (i = 0; i < req->n_channels; i++) {
11455                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11456                         goto nla_put_failure;
11457         }
11458         nla_nest_end(msg, nest);
11459
11460         if (req->ie &&
11461             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11462                 goto nla_put_failure;
11463
11464         if (req->flags &&
11465             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11466                 goto nla_put_failure;
11467
11468         return 0;
11469  nla_put_failure:
11470         return -ENOBUFS;
11471 }
11472
11473 static int nl80211_send_scan_msg(struct sk_buff *msg,
11474                                  struct cfg80211_registered_device *rdev,
11475                                  struct wireless_dev *wdev,
11476                                  u32 portid, u32 seq, int flags,
11477                                  u32 cmd)
11478 {
11479         void *hdr;
11480
11481         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11482         if (!hdr)
11483                 return -1;
11484
11485         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11486             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11487                                          wdev->netdev->ifindex)) ||
11488             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11489                 goto nla_put_failure;
11490
11491         /* ignore errors and send incomplete event anyway */
11492         nl80211_add_scan_req(msg, rdev);
11493
11494         genlmsg_end(msg, hdr);
11495         return 0;
11496
11497  nla_put_failure:
11498         genlmsg_cancel(msg, hdr);
11499         return -EMSGSIZE;
11500 }
11501
11502 static int
11503 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11504                             struct cfg80211_registered_device *rdev,
11505                             struct net_device *netdev,
11506                             u32 portid, u32 seq, int flags, u32 cmd)
11507 {
11508         void *hdr;
11509
11510         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11511         if (!hdr)
11512                 return -1;
11513
11514         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11515             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11516                 goto nla_put_failure;
11517
11518         genlmsg_end(msg, hdr);
11519         return 0;
11520
11521  nla_put_failure:
11522         genlmsg_cancel(msg, hdr);
11523         return -EMSGSIZE;
11524 }
11525
11526 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11527                              struct wireless_dev *wdev)
11528 {
11529         struct sk_buff *msg;
11530
11531         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11532         if (!msg)
11533                 return;
11534
11535         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11536                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11537                 nlmsg_free(msg);
11538                 return;
11539         }
11540
11541         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11542                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11543 }
11544
11545 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11546                                        struct wireless_dev *wdev, bool aborted)
11547 {
11548         struct sk_buff *msg;
11549
11550         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11551         if (!msg)
11552                 return NULL;
11553
11554         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11555                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11556                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11557                 nlmsg_free(msg);
11558                 return NULL;
11559         }
11560
11561         return msg;
11562 }
11563
11564 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11565                               struct sk_buff *msg)
11566 {
11567         if (!msg)
11568                 return;
11569
11570         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11571                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11572 }
11573
11574 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11575                                      struct net_device *netdev)
11576 {
11577         struct sk_buff *msg;
11578
11579         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11580         if (!msg)
11581                 return;
11582
11583         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11584                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11585                 nlmsg_free(msg);
11586                 return;
11587         }
11588
11589         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11590                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11591 }
11592
11593 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11594                              struct net_device *netdev, u32 cmd)
11595 {
11596         struct sk_buff *msg;
11597
11598         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11599         if (!msg)
11600                 return;
11601
11602         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11603                 nlmsg_free(msg);
11604                 return;
11605         }
11606
11607         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11608                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11609 }
11610
11611 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11612                                           struct regulatory_request *request)
11613 {
11614         /* Userspace can always count this one always being set */
11615         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11616                 goto nla_put_failure;
11617
11618         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11619                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11620                                NL80211_REGDOM_TYPE_WORLD))
11621                         goto nla_put_failure;
11622         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11623                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11624                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11625                         goto nla_put_failure;
11626         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11627                    request->intersect) {
11628                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11629                                NL80211_REGDOM_TYPE_INTERSECTION))
11630                         goto nla_put_failure;
11631         } else {
11632                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11633                                NL80211_REGDOM_TYPE_COUNTRY) ||
11634                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11635                                    request->alpha2))
11636                         goto nla_put_failure;
11637         }
11638
11639         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11640                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11641
11642                 if (wiphy &&
11643                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11644                         goto nla_put_failure;
11645
11646                 if (wiphy &&
11647                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11648                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11649                         goto nla_put_failure;
11650         }
11651
11652         return true;
11653
11654 nla_put_failure:
11655         return false;
11656 }
11657
11658 /*
11659  * This can happen on global regulatory changes or device specific settings
11660  * based on custom regulatory domains.
11661  */
11662 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11663                                      struct regulatory_request *request)
11664 {
11665         struct sk_buff *msg;
11666         void *hdr;
11667
11668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11669         if (!msg)
11670                 return;
11671
11672         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11673         if (!hdr) {
11674                 nlmsg_free(msg);
11675                 return;
11676         }
11677
11678         if (nl80211_reg_change_event_fill(msg, request) == false)
11679                 goto nla_put_failure;
11680
11681         genlmsg_end(msg, hdr);
11682
11683         rcu_read_lock();
11684         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11685                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11686         rcu_read_unlock();
11687
11688         return;
11689
11690 nla_put_failure:
11691         genlmsg_cancel(msg, hdr);
11692         nlmsg_free(msg);
11693 }
11694
11695 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11696                                     struct net_device *netdev,
11697                                     const u8 *buf, size_t len,
11698                                     enum nl80211_commands cmd, gfp_t gfp,
11699                                     int uapsd_queues)
11700 {
11701         struct sk_buff *msg;
11702         void *hdr;
11703
11704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11705         if (!msg)
11706                 return;
11707
11708         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11709         if (!hdr) {
11710                 nlmsg_free(msg);
11711                 return;
11712         }
11713
11714         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11715             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11716             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11717                 goto nla_put_failure;
11718
11719         if (uapsd_queues >= 0) {
11720                 struct nlattr *nla_wmm =
11721                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11722                 if (!nla_wmm)
11723                         goto nla_put_failure;
11724
11725                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11726                                uapsd_queues))
11727                         goto nla_put_failure;
11728
11729                 nla_nest_end(msg, nla_wmm);
11730         }
11731
11732         genlmsg_end(msg, hdr);
11733
11734         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11735                                 NL80211_MCGRP_MLME, gfp);
11736         return;
11737
11738  nla_put_failure:
11739         genlmsg_cancel(msg, hdr);
11740         nlmsg_free(msg);
11741 }
11742
11743 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11744                           struct net_device *netdev, const u8 *buf,
11745                           size_t len, gfp_t gfp)
11746 {
11747         nl80211_send_mlme_event(rdev, netdev, buf, len,
11748                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11749 }
11750
11751 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11752                            struct net_device *netdev, const u8 *buf,
11753                            size_t len, gfp_t gfp, int uapsd_queues)
11754 {
11755         nl80211_send_mlme_event(rdev, netdev, buf, len,
11756                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11757 }
11758
11759 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11760                          struct net_device *netdev, const u8 *buf,
11761                          size_t len, gfp_t gfp)
11762 {
11763         nl80211_send_mlme_event(rdev, netdev, buf, len,
11764                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11765 }
11766
11767 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11768                            struct net_device *netdev, const u8 *buf,
11769                            size_t len, gfp_t gfp)
11770 {
11771         nl80211_send_mlme_event(rdev, netdev, buf, len,
11772                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11773 }
11774
11775 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11776                                   size_t len)
11777 {
11778         struct wireless_dev *wdev = dev->ieee80211_ptr;
11779         struct wiphy *wiphy = wdev->wiphy;
11780         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11781         const struct ieee80211_mgmt *mgmt = (void *)buf;
11782         u32 cmd;
11783
11784         if (WARN_ON(len < 2))
11785                 return;
11786
11787         if (ieee80211_is_deauth(mgmt->frame_control))
11788                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11789         else
11790                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11791
11792         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11793         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11794 }
11795 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11796
11797 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11798                                       struct net_device *netdev, int cmd,
11799                                       const u8 *addr, gfp_t gfp)
11800 {
11801         struct sk_buff *msg;
11802         void *hdr;
11803
11804         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11805         if (!msg)
11806                 return;
11807
11808         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11809         if (!hdr) {
11810                 nlmsg_free(msg);
11811                 return;
11812         }
11813
11814         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11815             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11816             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11817             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11818                 goto nla_put_failure;
11819
11820         genlmsg_end(msg, hdr);
11821
11822         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11823                                 NL80211_MCGRP_MLME, gfp);
11824         return;
11825
11826  nla_put_failure:
11827         genlmsg_cancel(msg, hdr);
11828         nlmsg_free(msg);
11829 }
11830
11831 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11832                                struct net_device *netdev, const u8 *addr,
11833                                gfp_t gfp)
11834 {
11835         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11836                                   addr, gfp);
11837 }
11838
11839 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11840                                 struct net_device *netdev, const u8 *addr,
11841                                 gfp_t gfp)
11842 {
11843         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11844                                   addr, gfp);
11845 }
11846
11847 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11848                                  struct net_device *netdev, const u8 *bssid,
11849                                  const u8 *req_ie, size_t req_ie_len,
11850                                  const u8 *resp_ie, size_t resp_ie_len,
11851                                  u16 status, gfp_t gfp)
11852 {
11853         struct sk_buff *msg;
11854         void *hdr;
11855
11856         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11857         if (!msg)
11858                 return;
11859
11860         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11861         if (!hdr) {
11862                 nlmsg_free(msg);
11863                 return;
11864         }
11865
11866         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11867             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11868             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11869             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11870             (req_ie &&
11871              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11872             (resp_ie &&
11873              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11874                 goto nla_put_failure;
11875
11876         genlmsg_end(msg, hdr);
11877
11878         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11879                                 NL80211_MCGRP_MLME, gfp);
11880         return;
11881
11882  nla_put_failure:
11883         genlmsg_cancel(msg, hdr);
11884         nlmsg_free(msg);
11885
11886 }
11887
11888 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11889                          struct net_device *netdev, const u8 *bssid,
11890                          const u8 *req_ie, size_t req_ie_len,
11891                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11892 {
11893         struct sk_buff *msg;
11894         void *hdr;
11895
11896         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11897         if (!msg)
11898                 return;
11899
11900         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11901         if (!hdr) {
11902                 nlmsg_free(msg);
11903                 return;
11904         }
11905
11906         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11907             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11908             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11909             (req_ie &&
11910              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11911             (resp_ie &&
11912              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11913                 goto nla_put_failure;
11914
11915         genlmsg_end(msg, hdr);
11916
11917         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11918                                 NL80211_MCGRP_MLME, gfp);
11919         return;
11920
11921  nla_put_failure:
11922         genlmsg_cancel(msg, hdr);
11923         nlmsg_free(msg);
11924
11925 }
11926
11927 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11928                                struct net_device *netdev, u16 reason,
11929                                const u8 *ie, size_t ie_len, bool from_ap)
11930 {
11931         struct sk_buff *msg;
11932         void *hdr;
11933
11934         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11935         if (!msg)
11936                 return;
11937
11938         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
11939         if (!hdr) {
11940                 nlmsg_free(msg);
11941                 return;
11942         }
11943
11944         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11945             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11946             (from_ap && reason &&
11947              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
11948             (from_ap &&
11949              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
11950             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
11951                 goto nla_put_failure;
11952
11953         genlmsg_end(msg, hdr);
11954
11955         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11956                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11957         return;
11958
11959  nla_put_failure:
11960         genlmsg_cancel(msg, hdr);
11961         nlmsg_free(msg);
11962
11963 }
11964
11965 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
11966                              struct net_device *netdev, const u8 *bssid,
11967                              gfp_t gfp)
11968 {
11969         struct sk_buff *msg;
11970         void *hdr;
11971
11972         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11973         if (!msg)
11974                 return;
11975
11976         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
11977         if (!hdr) {
11978                 nlmsg_free(msg);
11979                 return;
11980         }
11981
11982         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11983             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11984             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11985                 goto nla_put_failure;
11986
11987         genlmsg_end(msg, hdr);
11988
11989         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11990                                 NL80211_MCGRP_MLME, gfp);
11991         return;
11992
11993  nla_put_failure:
11994         genlmsg_cancel(msg, hdr);
11995         nlmsg_free(msg);
11996 }
11997
11998 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
11999                                         const u8* ie, u8 ie_len, gfp_t gfp)
12000 {
12001         struct wireless_dev *wdev = dev->ieee80211_ptr;
12002         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12003         struct sk_buff *msg;
12004         void *hdr;
12005
12006         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12007                 return;
12008
12009         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12010
12011         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12012         if (!msg)
12013                 return;
12014
12015         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12016         if (!hdr) {
12017                 nlmsg_free(msg);
12018                 return;
12019         }
12020
12021         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12022             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12023             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12024             (ie_len && ie &&
12025              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12026                 goto nla_put_failure;
12027
12028         genlmsg_end(msg, hdr);
12029
12030         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12031                                 NL80211_MCGRP_MLME, gfp);
12032         return;
12033
12034  nla_put_failure:
12035         genlmsg_cancel(msg, hdr);
12036         nlmsg_free(msg);
12037 }
12038 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12039
12040 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12041                                  struct net_device *netdev, const u8 *addr,
12042                                  enum nl80211_key_type key_type, int key_id,
12043                                  const u8 *tsc, gfp_t gfp)
12044 {
12045         struct sk_buff *msg;
12046         void *hdr;
12047
12048         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12049         if (!msg)
12050                 return;
12051
12052         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12053         if (!hdr) {
12054                 nlmsg_free(msg);
12055                 return;
12056         }
12057
12058         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12059             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12060             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12061             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12062             (key_id != -1 &&
12063              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12064             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12065                 goto nla_put_failure;
12066
12067         genlmsg_end(msg, hdr);
12068
12069         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12070                                 NL80211_MCGRP_MLME, gfp);
12071         return;
12072
12073  nla_put_failure:
12074         genlmsg_cancel(msg, hdr);
12075         nlmsg_free(msg);
12076 }
12077
12078 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12079                                     struct ieee80211_channel *channel_before,
12080                                     struct ieee80211_channel *channel_after)
12081 {
12082         struct sk_buff *msg;
12083         void *hdr;
12084         struct nlattr *nl_freq;
12085
12086         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12087         if (!msg)
12088                 return;
12089
12090         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12091         if (!hdr) {
12092                 nlmsg_free(msg);
12093                 return;
12094         }
12095
12096         /*
12097          * Since we are applying the beacon hint to a wiphy we know its
12098          * wiphy_idx is valid
12099          */
12100         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12101                 goto nla_put_failure;
12102
12103         /* Before */
12104         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12105         if (!nl_freq)
12106                 goto nla_put_failure;
12107         if (nl80211_msg_put_channel(msg, channel_before, false))
12108                 goto nla_put_failure;
12109         nla_nest_end(msg, nl_freq);
12110
12111         /* After */
12112         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12113         if (!nl_freq)
12114                 goto nla_put_failure;
12115         if (nl80211_msg_put_channel(msg, channel_after, false))
12116                 goto nla_put_failure;
12117         nla_nest_end(msg, nl_freq);
12118
12119         genlmsg_end(msg, hdr);
12120
12121         rcu_read_lock();
12122         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12123                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12124         rcu_read_unlock();
12125
12126         return;
12127
12128 nla_put_failure:
12129         genlmsg_cancel(msg, hdr);
12130         nlmsg_free(msg);
12131 }
12132
12133 static void nl80211_send_remain_on_chan_event(
12134         int cmd, struct cfg80211_registered_device *rdev,
12135         struct wireless_dev *wdev, u64 cookie,
12136         struct ieee80211_channel *chan,
12137         unsigned int duration, gfp_t gfp)
12138 {
12139         struct sk_buff *msg;
12140         void *hdr;
12141
12142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12143         if (!msg)
12144                 return;
12145
12146         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12147         if (!hdr) {
12148                 nlmsg_free(msg);
12149                 return;
12150         }
12151
12152         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12153             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12154                                          wdev->netdev->ifindex)) ||
12155             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12156             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12157             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12158                         NL80211_CHAN_NO_HT) ||
12159             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
12160                 goto nla_put_failure;
12161
12162         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12163             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12164                 goto nla_put_failure;
12165
12166         genlmsg_end(msg, hdr);
12167
12168         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12169                                 NL80211_MCGRP_MLME, gfp);
12170         return;
12171
12172  nla_put_failure:
12173         genlmsg_cancel(msg, hdr);
12174         nlmsg_free(msg);
12175 }
12176
12177 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12178                                struct ieee80211_channel *chan,
12179                                unsigned int duration, gfp_t gfp)
12180 {
12181         struct wiphy *wiphy = wdev->wiphy;
12182         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12183
12184         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12185         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12186                                           rdev, wdev, cookie, chan,
12187                                           duration, gfp);
12188 }
12189 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12190
12191 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12192                                         struct ieee80211_channel *chan,
12193                                         gfp_t gfp)
12194 {
12195         struct wiphy *wiphy = wdev->wiphy;
12196         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12197
12198         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12199         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12200                                           rdev, wdev, cookie, chan, 0, gfp);
12201 }
12202 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12203
12204 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12205                       struct station_info *sinfo, gfp_t gfp)
12206 {
12207         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12208         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12209         struct sk_buff *msg;
12210
12211         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12212
12213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12214         if (!msg)
12215                 return;
12216
12217         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12218                                  rdev, dev, mac_addr, sinfo) < 0) {
12219                 nlmsg_free(msg);
12220                 return;
12221         }
12222
12223         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12224                                 NL80211_MCGRP_MLME, gfp);
12225 }
12226 EXPORT_SYMBOL(cfg80211_new_sta);
12227
12228 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12229                             struct station_info *sinfo, gfp_t gfp)
12230 {
12231         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12232         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12233         struct sk_buff *msg;
12234         struct station_info empty_sinfo = {};
12235
12236         if (!sinfo)
12237                 sinfo = &empty_sinfo;
12238
12239         trace_cfg80211_del_sta(dev, mac_addr);
12240
12241         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12242         if (!msg)
12243                 return;
12244
12245         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12246                                  rdev, dev, mac_addr, sinfo) < 0) {
12247                 nlmsg_free(msg);
12248                 return;
12249         }
12250
12251         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12252                                 NL80211_MCGRP_MLME, gfp);
12253 }
12254 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12255
12256 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12257                           enum nl80211_connect_failed_reason reason,
12258                           gfp_t gfp)
12259 {
12260         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12261         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12262         struct sk_buff *msg;
12263         void *hdr;
12264
12265         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12266         if (!msg)
12267                 return;
12268
12269         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12270         if (!hdr) {
12271                 nlmsg_free(msg);
12272                 return;
12273         }
12274
12275         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12276             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12277             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12278                 goto nla_put_failure;
12279
12280         genlmsg_end(msg, hdr);
12281
12282         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12283                                 NL80211_MCGRP_MLME, gfp);
12284         return;
12285
12286  nla_put_failure:
12287         genlmsg_cancel(msg, hdr);
12288         nlmsg_free(msg);
12289 }
12290 EXPORT_SYMBOL(cfg80211_conn_failed);
12291
12292 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12293                                        const u8 *addr, gfp_t gfp)
12294 {
12295         struct wireless_dev *wdev = dev->ieee80211_ptr;
12296         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12297         struct sk_buff *msg;
12298         void *hdr;
12299         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12300
12301         if (!nlportid)
12302                 return false;
12303
12304         msg = nlmsg_new(100, gfp);
12305         if (!msg)
12306                 return true;
12307
12308         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12309         if (!hdr) {
12310                 nlmsg_free(msg);
12311                 return true;
12312         }
12313
12314         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12315             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12316             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12317                 goto nla_put_failure;
12318
12319         genlmsg_end(msg, hdr);
12320         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12321         return true;
12322
12323  nla_put_failure:
12324         genlmsg_cancel(msg, hdr);
12325         nlmsg_free(msg);
12326         return true;
12327 }
12328
12329 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12330                                 const u8 *addr, gfp_t gfp)
12331 {
12332         struct wireless_dev *wdev = dev->ieee80211_ptr;
12333         bool ret;
12334
12335         trace_cfg80211_rx_spurious_frame(dev, addr);
12336
12337         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12338                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12339                 trace_cfg80211_return_bool(false);
12340                 return false;
12341         }
12342         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12343                                          addr, gfp);
12344         trace_cfg80211_return_bool(ret);
12345         return ret;
12346 }
12347 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12348
12349 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12350                                         const u8 *addr, gfp_t gfp)
12351 {
12352         struct wireless_dev *wdev = dev->ieee80211_ptr;
12353         bool ret;
12354
12355         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12356
12357         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12358                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12359                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12360                 trace_cfg80211_return_bool(false);
12361                 return false;
12362         }
12363         ret = __nl80211_unexpected_frame(dev,
12364                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12365                                          addr, gfp);
12366         trace_cfg80211_return_bool(ret);
12367         return ret;
12368 }
12369 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12370
12371 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12372                       struct wireless_dev *wdev, u32 nlportid,
12373                       int freq, int sig_dbm,
12374                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12375 {
12376         struct net_device *netdev = wdev->netdev;
12377         struct sk_buff *msg;
12378         void *hdr;
12379
12380         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12381         if (!msg)
12382                 return -ENOMEM;
12383
12384         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12385         if (!hdr) {
12386                 nlmsg_free(msg);
12387                 return -ENOMEM;
12388         }
12389
12390         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12391             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12392                                         netdev->ifindex)) ||
12393             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12394             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12395             (sig_dbm &&
12396              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12397             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12398             (flags &&
12399              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12400                 goto nla_put_failure;
12401
12402         genlmsg_end(msg, hdr);
12403
12404         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12405
12406  nla_put_failure:
12407         genlmsg_cancel(msg, hdr);
12408         nlmsg_free(msg);
12409         return -ENOBUFS;
12410 }
12411
12412 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12413                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12414 {
12415         struct wiphy *wiphy = wdev->wiphy;
12416         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12417         struct net_device *netdev = wdev->netdev;
12418         struct sk_buff *msg;
12419         void *hdr;
12420
12421         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12422
12423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12424         if (!msg)
12425                 return;
12426
12427         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12428         if (!hdr) {
12429                 nlmsg_free(msg);
12430                 return;
12431         }
12432
12433         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12434             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12435                                    netdev->ifindex)) ||
12436             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12437             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12438             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12439             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12440                 goto nla_put_failure;
12441
12442         genlmsg_end(msg, hdr);
12443
12444         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12445                                 NL80211_MCGRP_MLME, gfp);
12446         return;
12447
12448  nla_put_failure:
12449         genlmsg_cancel(msg, hdr);
12450         nlmsg_free(msg);
12451 }
12452 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12453
12454 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12455                                             const char *mac, gfp_t gfp)
12456 {
12457         struct wireless_dev *wdev = dev->ieee80211_ptr;
12458         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12459         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12460         void **cb;
12461
12462         if (!msg)
12463                 return NULL;
12464
12465         cb = (void **)msg->cb;
12466
12467         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12468         if (!cb[0]) {
12469                 nlmsg_free(msg);
12470                 return NULL;
12471         }
12472
12473         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12474             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12475                 goto nla_put_failure;
12476
12477         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12478                 goto nla_put_failure;
12479
12480         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12481         if (!cb[1])
12482                 goto nla_put_failure;
12483
12484         cb[2] = rdev;
12485
12486         return msg;
12487  nla_put_failure:
12488         nlmsg_free(msg);
12489         return NULL;
12490 }
12491
12492 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12493 {
12494         void **cb = (void **)msg->cb;
12495         struct cfg80211_registered_device *rdev = cb[2];
12496
12497         nla_nest_end(msg, cb[1]);
12498         genlmsg_end(msg, cb[0]);
12499
12500         memset(msg->cb, 0, sizeof(msg->cb));
12501
12502         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12503                                 NL80211_MCGRP_MLME, gfp);
12504 }
12505
12506 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12507                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12508                               gfp_t gfp)
12509 {
12510         struct sk_buff *msg;
12511
12512         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12513
12514         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12515                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12516                 return;
12517
12518         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12519         if (!msg)
12520                 return;
12521
12522         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12523                         rssi_event))
12524                 goto nla_put_failure;
12525
12526         cfg80211_send_cqm(msg, gfp);
12527
12528         return;
12529
12530  nla_put_failure:
12531         nlmsg_free(msg);
12532 }
12533 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12534
12535 void cfg80211_cqm_txe_notify(struct net_device *dev,
12536                              const u8 *peer, u32 num_packets,
12537                              u32 rate, u32 intvl, gfp_t gfp)
12538 {
12539         struct sk_buff *msg;
12540
12541         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12542         if (!msg)
12543                 return;
12544
12545         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12546                 goto nla_put_failure;
12547
12548         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12549                 goto nla_put_failure;
12550
12551         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12552                 goto nla_put_failure;
12553
12554         cfg80211_send_cqm(msg, gfp);
12555         return;
12556
12557  nla_put_failure:
12558         nlmsg_free(msg);
12559 }
12560 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12561
12562 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12563                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12564 {
12565         struct sk_buff *msg;
12566
12567         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12568
12569         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12570         if (!msg)
12571                 return;
12572
12573         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12574                 goto nla_put_failure;
12575
12576         cfg80211_send_cqm(msg, gfp);
12577         return;
12578
12579  nla_put_failure:
12580         nlmsg_free(msg);
12581 }
12582 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12583
12584 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12585 {
12586         struct sk_buff *msg;
12587
12588         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12589         if (!msg)
12590                 return;
12591
12592         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12593                 goto nla_put_failure;
12594
12595         cfg80211_send_cqm(msg, gfp);
12596         return;
12597
12598  nla_put_failure:
12599         nlmsg_free(msg);
12600 }
12601 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12602
12603 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12604                                      struct net_device *netdev, const u8 *bssid,
12605                                      const u8 *replay_ctr, gfp_t gfp)
12606 {
12607         struct sk_buff *msg;
12608         struct nlattr *rekey_attr;
12609         void *hdr;
12610
12611         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12612         if (!msg)
12613                 return;
12614
12615         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12616         if (!hdr) {
12617                 nlmsg_free(msg);
12618                 return;
12619         }
12620
12621         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12622             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12623             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12624                 goto nla_put_failure;
12625
12626         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12627         if (!rekey_attr)
12628                 goto nla_put_failure;
12629
12630         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12631                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12632                 goto nla_put_failure;
12633
12634         nla_nest_end(msg, rekey_attr);
12635
12636         genlmsg_end(msg, hdr);
12637
12638         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12639                                 NL80211_MCGRP_MLME, gfp);
12640         return;
12641
12642  nla_put_failure:
12643         genlmsg_cancel(msg, hdr);
12644         nlmsg_free(msg);
12645 }
12646
12647 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12648                                const u8 *replay_ctr, gfp_t gfp)
12649 {
12650         struct wireless_dev *wdev = dev->ieee80211_ptr;
12651         struct wiphy *wiphy = wdev->wiphy;
12652         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12653
12654         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12655         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12656 }
12657 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12658
12659 static void
12660 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12661                                struct net_device *netdev, int index,
12662                                const u8 *bssid, bool preauth, gfp_t gfp)
12663 {
12664         struct sk_buff *msg;
12665         struct nlattr *attr;
12666         void *hdr;
12667
12668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12669         if (!msg)
12670                 return;
12671
12672         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12673         if (!hdr) {
12674                 nlmsg_free(msg);
12675                 return;
12676         }
12677
12678         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12679             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12680                 goto nla_put_failure;
12681
12682         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12683         if (!attr)
12684                 goto nla_put_failure;
12685
12686         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12687             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12688             (preauth &&
12689              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12690                 goto nla_put_failure;
12691
12692         nla_nest_end(msg, attr);
12693
12694         genlmsg_end(msg, hdr);
12695
12696         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12697                                 NL80211_MCGRP_MLME, gfp);
12698         return;
12699
12700  nla_put_failure:
12701         genlmsg_cancel(msg, hdr);
12702         nlmsg_free(msg);
12703 }
12704
12705 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12706                                      const u8 *bssid, bool preauth, gfp_t gfp)
12707 {
12708         struct wireless_dev *wdev = dev->ieee80211_ptr;
12709         struct wiphy *wiphy = wdev->wiphy;
12710         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12711
12712         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12713         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12714 }
12715 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12716
12717 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12718                                      struct net_device *netdev,
12719                                      struct cfg80211_chan_def *chandef,
12720                                      gfp_t gfp,
12721                                      enum nl80211_commands notif,
12722                                      u8 count)
12723 {
12724         struct sk_buff *msg;
12725         void *hdr;
12726
12727         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12728         if (!msg)
12729                 return;
12730
12731         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12732         if (!hdr) {
12733                 nlmsg_free(msg);
12734                 return;
12735         }
12736
12737         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12738                 goto nla_put_failure;
12739
12740         if (nl80211_send_chandef(msg, chandef))
12741                 goto nla_put_failure;
12742
12743         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12744             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12745                         goto nla_put_failure;
12746
12747         genlmsg_end(msg, hdr);
12748
12749         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12750                                 NL80211_MCGRP_MLME, gfp);
12751         return;
12752
12753  nla_put_failure:
12754         genlmsg_cancel(msg, hdr);
12755         nlmsg_free(msg);
12756 }
12757
12758 void cfg80211_ch_switch_notify(struct net_device *dev,
12759                                struct cfg80211_chan_def *chandef)
12760 {
12761         struct wireless_dev *wdev = dev->ieee80211_ptr;
12762         struct wiphy *wiphy = wdev->wiphy;
12763         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12764
12765         ASSERT_WDEV_LOCK(wdev);
12766
12767         trace_cfg80211_ch_switch_notify(dev, chandef);
12768
12769         wdev->chandef = *chandef;
12770         wdev->preset_chandef = *chandef;
12771         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12772                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12773 }
12774 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12775
12776 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12777                                        struct cfg80211_chan_def *chandef,
12778                                        u8 count)
12779 {
12780         struct wireless_dev *wdev = dev->ieee80211_ptr;
12781         struct wiphy *wiphy = wdev->wiphy;
12782         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12783
12784         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12785
12786         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12787                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12788 }
12789 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12790
12791 void
12792 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12793                      const struct cfg80211_chan_def *chandef,
12794                      enum nl80211_radar_event event,
12795                      struct net_device *netdev, gfp_t gfp)
12796 {
12797         struct sk_buff *msg;
12798         void *hdr;
12799
12800         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12801         if (!msg)
12802                 return;
12803
12804         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12805         if (!hdr) {
12806                 nlmsg_free(msg);
12807                 return;
12808         }
12809
12810         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12811                 goto nla_put_failure;
12812
12813         /* NOP and radar events don't need a netdev parameter */
12814         if (netdev) {
12815                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12816
12817                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12818                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12819                         goto nla_put_failure;
12820         }
12821
12822         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12823                 goto nla_put_failure;
12824
12825         if (nl80211_send_chandef(msg, chandef))
12826                 goto nla_put_failure;
12827
12828         genlmsg_end(msg, hdr);
12829
12830         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12831                                 NL80211_MCGRP_MLME, gfp);
12832         return;
12833
12834  nla_put_failure:
12835         genlmsg_cancel(msg, hdr);
12836         nlmsg_free(msg);
12837 }
12838
12839 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12840                            u64 cookie, bool acked, gfp_t gfp)
12841 {
12842         struct wireless_dev *wdev = dev->ieee80211_ptr;
12843         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12844         struct sk_buff *msg;
12845         void *hdr;
12846
12847         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12848
12849         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12850
12851         if (!msg)
12852                 return;
12853
12854         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12855         if (!hdr) {
12856                 nlmsg_free(msg);
12857                 return;
12858         }
12859
12860         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12861             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12862             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12863             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12864             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12865                 goto nla_put_failure;
12866
12867         genlmsg_end(msg, hdr);
12868
12869         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12870                                 NL80211_MCGRP_MLME, gfp);
12871         return;
12872
12873  nla_put_failure:
12874         genlmsg_cancel(msg, hdr);
12875         nlmsg_free(msg);
12876 }
12877 EXPORT_SYMBOL(cfg80211_probe_status);
12878
12879 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12880                                  const u8 *frame, size_t len,
12881                                  int freq, int sig_dbm)
12882 {
12883         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12884         struct sk_buff *msg;
12885         void *hdr;
12886         struct cfg80211_beacon_registration *reg;
12887
12888         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12889
12890         spin_lock_bh(&rdev->beacon_registrations_lock);
12891         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12892                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12893                 if (!msg) {
12894                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12895                         return;
12896                 }
12897
12898                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12899                 if (!hdr)
12900                         goto nla_put_failure;
12901
12902                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12903                     (freq &&
12904                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12905                     (sig_dbm &&
12906                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12907                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12908                         goto nla_put_failure;
12909
12910                 genlmsg_end(msg, hdr);
12911
12912                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12913         }
12914         spin_unlock_bh(&rdev->beacon_registrations_lock);
12915         return;
12916
12917  nla_put_failure:
12918         spin_unlock_bh(&rdev->beacon_registrations_lock);
12919         if (hdr)
12920                 genlmsg_cancel(msg, hdr);
12921         nlmsg_free(msg);
12922 }
12923 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
12924
12925 #ifdef CONFIG_PM
12926 static int cfg80211_net_detect_results(struct sk_buff *msg,
12927                                        struct cfg80211_wowlan_wakeup *wakeup)
12928 {
12929         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
12930         struct nlattr *nl_results, *nl_match, *nl_freqs;
12931         int i, j;
12932
12933         nl_results = nla_nest_start(
12934                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
12935         if (!nl_results)
12936                 return -EMSGSIZE;
12937
12938         for (i = 0; i < nd->n_matches; i++) {
12939                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
12940
12941                 nl_match = nla_nest_start(msg, i);
12942                 if (!nl_match)
12943                         break;
12944
12945                 /* The SSID attribute is optional in nl80211, but for
12946                  * simplicity reasons it's always present in the
12947                  * cfg80211 structure.  If a driver can't pass the
12948                  * SSID, that needs to be changed.  A zero length SSID
12949                  * is still a valid SSID (wildcard), so it cannot be
12950                  * used for this purpose.
12951                  */
12952                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
12953                             match->ssid.ssid)) {
12954                         nla_nest_cancel(msg, nl_match);
12955                         goto out;
12956                 }
12957
12958                 if (match->n_channels) {
12959                         nl_freqs = nla_nest_start(
12960                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
12961                         if (!nl_freqs) {
12962                                 nla_nest_cancel(msg, nl_match);
12963                                 goto out;
12964                         }
12965
12966                         for (j = 0; j < match->n_channels; j++) {
12967                                 if (nla_put_u32(msg, j, match->channels[j])) {
12968                                         nla_nest_cancel(msg, nl_freqs);
12969                                         nla_nest_cancel(msg, nl_match);
12970                                         goto out;
12971                                 }
12972                         }
12973
12974                         nla_nest_end(msg, nl_freqs);
12975                 }
12976
12977                 nla_nest_end(msg, nl_match);
12978         }
12979
12980 out:
12981         nla_nest_end(msg, nl_results);
12982         return 0;
12983 }
12984
12985 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
12986                                    struct cfg80211_wowlan_wakeup *wakeup,
12987                                    gfp_t gfp)
12988 {
12989         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12990         struct sk_buff *msg;
12991         void *hdr;
12992         int size = 200;
12993
12994         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
12995
12996         if (wakeup)
12997                 size += wakeup->packet_present_len;
12998
12999         msg = nlmsg_new(size, gfp);
13000         if (!msg)
13001                 return;
13002
13003         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13004         if (!hdr)
13005                 goto free_msg;
13006
13007         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13008             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13009                 goto free_msg;
13010
13011         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13012                                         wdev->netdev->ifindex))
13013                 goto free_msg;
13014
13015         if (wakeup) {
13016                 struct nlattr *reasons;
13017
13018                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13019                 if (!reasons)
13020                         goto free_msg;
13021
13022                 if (wakeup->disconnect &&
13023                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13024                         goto free_msg;
13025                 if (wakeup->magic_pkt &&
13026                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13027                         goto free_msg;
13028                 if (wakeup->gtk_rekey_failure &&
13029                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13030                         goto free_msg;
13031                 if (wakeup->eap_identity_req &&
13032                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13033                         goto free_msg;
13034                 if (wakeup->four_way_handshake &&
13035                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13036                         goto free_msg;
13037                 if (wakeup->rfkill_release &&
13038                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13039                         goto free_msg;
13040
13041                 if (wakeup->pattern_idx >= 0 &&
13042                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13043                                 wakeup->pattern_idx))
13044                         goto free_msg;
13045
13046                 if (wakeup->tcp_match &&
13047                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13048                         goto free_msg;
13049
13050                 if (wakeup->tcp_connlost &&
13051                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13052                         goto free_msg;
13053
13054                 if (wakeup->tcp_nomoretokens &&
13055                     nla_put_flag(msg,
13056                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13057                         goto free_msg;
13058
13059                 if (wakeup->packet) {
13060                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13061                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13062
13063                         if (!wakeup->packet_80211) {
13064                                 pkt_attr =
13065                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13066                                 len_attr =
13067                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13068                         }
13069
13070                         if (wakeup->packet_len &&
13071                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13072                                 goto free_msg;
13073
13074                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13075                                     wakeup->packet))
13076                                 goto free_msg;
13077                 }
13078
13079                 if (wakeup->net_detect &&
13080                     cfg80211_net_detect_results(msg, wakeup))
13081                                 goto free_msg;
13082
13083                 nla_nest_end(msg, reasons);
13084         }
13085
13086         genlmsg_end(msg, hdr);
13087
13088         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13089                                 NL80211_MCGRP_MLME, gfp);
13090         return;
13091
13092  free_msg:
13093         nlmsg_free(msg);
13094 }
13095 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13096 #endif
13097
13098 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13099                                 enum nl80211_tdls_operation oper,
13100                                 u16 reason_code, gfp_t gfp)
13101 {
13102         struct wireless_dev *wdev = dev->ieee80211_ptr;
13103         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13104         struct sk_buff *msg;
13105         void *hdr;
13106
13107         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13108                                          reason_code);
13109
13110         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13111         if (!msg)
13112                 return;
13113
13114         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13115         if (!hdr) {
13116                 nlmsg_free(msg);
13117                 return;
13118         }
13119
13120         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13121             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13122             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13123             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13124             (reason_code > 0 &&
13125              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13126                 goto nla_put_failure;
13127
13128         genlmsg_end(msg, hdr);
13129
13130         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13131                                 NL80211_MCGRP_MLME, gfp);
13132         return;
13133
13134  nla_put_failure:
13135         genlmsg_cancel(msg, hdr);
13136         nlmsg_free(msg);
13137 }
13138 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13139
13140 static int nl80211_netlink_notify(struct notifier_block * nb,
13141                                   unsigned long state,
13142                                   void *_notify)
13143 {
13144         struct netlink_notify *notify = _notify;
13145         struct cfg80211_registered_device *rdev;
13146         struct wireless_dev *wdev;
13147         struct cfg80211_beacon_registration *reg, *tmp;
13148
13149         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13150                 return NOTIFY_DONE;
13151
13152         rcu_read_lock();
13153
13154         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13155                 bool schedule_destroy_work = false;
13156                 struct cfg80211_sched_scan_request *sched_scan_req =
13157                         rcu_dereference(rdev->sched_scan_req);
13158
13159                 if (sched_scan_req && notify->portid &&
13160                     sched_scan_req->owner_nlportid == notify->portid) {
13161                         sched_scan_req->owner_nlportid = 0;
13162
13163                         if (rdev->ops->sched_scan_stop &&
13164                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13165                                 schedule_work(&rdev->sched_scan_stop_wk);
13166                 }
13167
13168                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13169                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13170
13171                         if (wdev->owner_nlportid == notify->portid)
13172                                 schedule_destroy_work = true;
13173                 }
13174
13175                 spin_lock_bh(&rdev->beacon_registrations_lock);
13176                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13177                                          list) {
13178                         if (reg->nlportid == notify->portid) {
13179                                 list_del(&reg->list);
13180                                 kfree(reg);
13181                                 break;
13182                         }
13183                 }
13184                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13185
13186                 if (schedule_destroy_work) {
13187                         struct cfg80211_iface_destroy *destroy;
13188
13189                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13190                         if (destroy) {
13191                                 destroy->nlportid = notify->portid;
13192                                 spin_lock(&rdev->destroy_list_lock);
13193                                 list_add(&destroy->list, &rdev->destroy_list);
13194                                 spin_unlock(&rdev->destroy_list_lock);
13195                                 schedule_work(&rdev->destroy_work);
13196                         }
13197                 }
13198         }
13199
13200         rcu_read_unlock();
13201
13202         /*
13203          * It is possible that the user space process that is controlling the
13204          * indoor setting disappeared, so notify the regulatory core.
13205          */
13206         regulatory_netlink_notify(notify->portid);
13207         return NOTIFY_OK;
13208 }
13209
13210 static struct notifier_block nl80211_netlink_notifier = {
13211         .notifier_call = nl80211_netlink_notify,
13212 };
13213
13214 void cfg80211_ft_event(struct net_device *netdev,
13215                        struct cfg80211_ft_event_params *ft_event)
13216 {
13217         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13218         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13219         struct sk_buff *msg;
13220         void *hdr;
13221
13222         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13223
13224         if (!ft_event->target_ap)
13225                 return;
13226
13227         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13228         if (!msg)
13229                 return;
13230
13231         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13232         if (!hdr)
13233                 goto out;
13234
13235         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13236             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13237             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13238                 goto out;
13239
13240         if (ft_event->ies &&
13241             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13242                 goto out;
13243         if (ft_event->ric_ies &&
13244             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13245                     ft_event->ric_ies))
13246                 goto out;
13247
13248         genlmsg_end(msg, hdr);
13249
13250         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13251                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13252         return;
13253  out:
13254         nlmsg_free(msg);
13255 }
13256 EXPORT_SYMBOL(cfg80211_ft_event);
13257
13258 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13259 {
13260         struct cfg80211_registered_device *rdev;
13261         struct sk_buff *msg;
13262         void *hdr;
13263         u32 nlportid;
13264
13265         rdev = wiphy_to_rdev(wdev->wiphy);
13266         if (!rdev->crit_proto_nlportid)
13267                 return;
13268
13269         nlportid = rdev->crit_proto_nlportid;
13270         rdev->crit_proto_nlportid = 0;
13271
13272         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13273         if (!msg)
13274                 return;
13275
13276         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13277         if (!hdr)
13278                 goto nla_put_failure;
13279
13280         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13281             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13282                 goto nla_put_failure;
13283
13284         genlmsg_end(msg, hdr);
13285
13286         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13287         return;
13288
13289  nla_put_failure:
13290         if (hdr)
13291                 genlmsg_cancel(msg, hdr);
13292         nlmsg_free(msg);
13293
13294 }
13295 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13296
13297 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13298 {
13299         struct wiphy *wiphy = wdev->wiphy;
13300         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13301         struct sk_buff *msg;
13302         void *hdr;
13303
13304         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13305         if (!msg)
13306                 return;
13307
13308         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13309         if (!hdr)
13310                 goto out;
13311
13312         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13313             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13314             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13315                 goto out;
13316
13317         genlmsg_end(msg, hdr);
13318
13319         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13320                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13321         return;
13322  out:
13323         nlmsg_free(msg);
13324 }
13325
13326 /* initialisation/exit functions */
13327
13328 int nl80211_init(void)
13329 {
13330         int err;
13331
13332         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13333                                                    nl80211_mcgrps);
13334         if (err)
13335                 return err;
13336
13337         err = netlink_register_notifier(&nl80211_netlink_notifier);
13338         if (err)
13339                 goto err_out;
13340
13341         return 0;
13342  err_out:
13343         genl_unregister_family(&nl80211_fam);
13344         return err;
13345 }
13346
13347 void nl80211_exit(void)
13348 {
13349         netlink_unregister_notifier(&nl80211_netlink_notifier);
13350         genl_unregister_family(&nl80211_fam);
13351 }