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 2015-2016  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         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 405         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 406         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 407 };
 408
 409 /* policy for the key attributes */
 410 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 411         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 412         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 413         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 414         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 415         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 416         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 417         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 418         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 419 };
 420
 421 /* policy for the key default flags */
 422 static const struct nla_policy
 423 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 424         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 425         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 426 };
 427
 428 /* policy for WoWLAN attributes */
 429 static const struct nla_policy
 430 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 431         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 432         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 433         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 435         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 440         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 441 };
 442
 443 static const struct nla_policy
 444 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 445         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 446         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 447         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 448         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 449         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 450         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 451         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 452                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 453         },
 454         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 455                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 456         },
 457         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 458         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 459         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 460 };
 461
 462 /* policy for coalesce rule attributes */
 463 static const struct nla_policy
 464 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 465         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 466         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 467         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 468 };
 469
 470 /* policy for GTK rekey offload attributes */
 471 static const struct nla_policy
 472 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 473         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 474         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 475         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 476 };
 477
 478 static const struct nla_policy
 479 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 480         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 481                                                  .len = IEEE80211_MAX_SSID_LEN },
 482         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 483 };
 484
 485 static const struct nla_policy
 486 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 487         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 488         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 489 };
 490
 491 static const struct nla_policy
 492 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 493         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 494         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 495         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 496                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 497         },
 498 };
 499
 500 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 501                                      struct netlink_callback *cb,
 502                                      struct cfg80211_registered_device **rdev,
 503                                      struct wireless_dev **wdev)
 504 {
 505         int err;
 506
 507         rtnl_lock();
 508
 509         if (!cb->args[0]) {
 510                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 511                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 512                                   nl80211_policy);
 513                 if (err)
 514                         goto out_unlock;
 515
 516                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 517                                                    nl80211_fam.attrbuf);
 518                 if (IS_ERR(*wdev)) {
 519                         err = PTR_ERR(*wdev);
 520                         goto out_unlock;
 521                 }
 522                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 523                 /* 0 is the first index - add 1 to parse only once */
 524                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 525                 cb->args[1] = (*wdev)->identifier;
 526         } else {
 527                 /* subtract the 1 again here */
 528                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 529                 struct wireless_dev *tmp;
 530
 531                 if (!wiphy) {
 532                         err = -ENODEV;
 533                         goto out_unlock;
 534                 }
 535                 *rdev = wiphy_to_rdev(wiphy);
 536                 *wdev = NULL;
 537
 538                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 539                         if (tmp->identifier == cb->args[1]) {
 540                                 *wdev = tmp;
 541                                 break;
 542                         }
 543                 }
 544
 545                 if (!*wdev) {
 546                         err = -ENODEV;
 547                         goto out_unlock;
 548                 }
 549         }
 550
 551         return 0;
 552  out_unlock:
 553         rtnl_unlock();
 554         return err;
 555 }
 556
 557 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 558 {
 559         rtnl_unlock();
 560 }
 561
 562 /* IE validation */
 563 static bool is_valid_ie_attr(const struct nlattr *attr)
 564 {
 565         const u8 *pos;
 566         int len;
 567
 568         if (!attr)
 569                 return true;
 570
 571         pos = nla_data(attr);
 572         len = nla_len(attr);
 573
 574         while (len) {
 575                 u8 elemlen;
 576
 577                 if (len < 2)
 578                         return false;
 579                 len -= 2;
 580
 581                 elemlen = pos[1];
 582                 if (elemlen > len)
 583                         return false;
 584
 585                 len -= elemlen;
 586                 pos += 2 + elemlen;
 587         }
 588
 589         return true;
 590 }
 591
 592 /* message building helper */
 593 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 594                                    int flags, u8 cmd)
 595 {
 596         /* since there is no private header just add the generic one */
 597         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 598 }
 599
 600 static int nl80211_msg_put_channel(struct sk_buff *msg,
 601                                    struct ieee80211_channel *chan,
 602                                    bool large)
 603 {
 604         /* Some channels must be completely excluded from the
 605          * list to protect old user-space tools from breaking
 606          */
 607         if (!large && chan->flags &
 608             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 609                 return 0;
 610
 611         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 612                         chan->center_freq))
 613                 goto nla_put_failure;
 614
 615         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 616             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 617                 goto nla_put_failure;
 618         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 619                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 620                         goto nla_put_failure;
 621                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 622                         goto nla_put_failure;
 623         }
 624         if (chan->flags & IEEE80211_CHAN_RADAR) {
 625                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 626                         goto nla_put_failure;
 627                 if (large) {
 628                         u32 time;
 629
 630                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 631
 632                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 633                                         chan->dfs_state))
 634                                 goto nla_put_failure;
 635                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 636                                         time))
 637                                 goto nla_put_failure;
 638                         if (nla_put_u32(msg,
 639                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 640                                         chan->dfs_cac_ms))
 641                                 goto nla_put_failure;
 642                 }
 643         }
 644
 645         if (large) {
 646                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 647                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 648                         goto nla_put_failure;
 649                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 650                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 651                         goto nla_put_failure;
 652                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 653                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 654                         goto nla_put_failure;
 655                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 656                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 657                         goto nla_put_failure;
 658                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 659                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 660                         goto nla_put_failure;
 661                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 662                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 663                         goto nla_put_failure;
 664                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 665                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 666                         goto nla_put_failure;
 667                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 668                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 669                         goto nla_put_failure;
 670         }
 671
 672         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 673                         DBM_TO_MBM(chan->max_power)))
 674                 goto nla_put_failure;
 675
 676         return 0;
 677
 678  nla_put_failure:
 679         return -ENOBUFS;
 680 }
 681
 682 /* netlink command implementations */
 683
 684 struct key_parse {
 685         struct key_params p;
 686         int idx;
 687         int type;
 688         bool def, defmgmt;
 689         bool def_uni, def_multi;
 690 };
 691
 692 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 693 {
 694         struct nlattr *tb[NL80211_KEY_MAX + 1];
 695         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 696                                    nl80211_key_policy);
 697         if (err)
 698                 return err;
 699
 700         k->def = !!tb[NL80211_KEY_DEFAULT];
 701         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 702
 703         if (k->def) {
 704                 k->def_uni = true;
 705                 k->def_multi = true;
 706         }
 707         if (k->defmgmt)
 708                 k->def_multi = true;
 709
 710         if (tb[NL80211_KEY_IDX])
 711                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 712
 713         if (tb[NL80211_KEY_DATA]) {
 714                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 715                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 716         }
 717
 718         if (tb[NL80211_KEY_SEQ]) {
 719                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 720                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 721         }
 722
 723         if (tb[NL80211_KEY_CIPHER])
 724                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 725
 726         if (tb[NL80211_KEY_TYPE]) {
 727                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 728                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 729                         return -EINVAL;
 730         }
 731
 732         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 733                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 734                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 735                                        tb[NL80211_KEY_DEFAULT_TYPES],
 736                                        nl80211_key_default_policy);
 737                 if (err)
 738                         return err;
 739
 740                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 741                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 742         }
 743
 744         return 0;
 745 }
 746
 747 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 748 {
 749         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 750                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 751                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 752         }
 753
 754         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 755                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 756                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 757         }
 758
 759         if (info->attrs[NL80211_ATTR_KEY_IDX])
 760                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 761
 762         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 763                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 764
 765         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 766         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 767
 768         if (k->def) {
 769                 k->def_uni = true;
 770                 k->def_multi = true;
 771         }
 772         if (k->defmgmt)
 773                 k->def_multi = true;
 774
 775         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 776                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 777                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 778                         return -EINVAL;
 779         }
 780
 781         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 782                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 783                 int err = nla_parse_nested(
 784                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 785                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 786                                 nl80211_key_default_policy);
 787                 if (err)
 788                         return err;
 789
 790                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 791                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 792         }
 793
 794         return 0;
 795 }
 796
 797 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 798 {
 799         int err;
 800
 801         memset(k, 0, sizeof(*k));
 802         k->idx = -1;
 803         k->type = -1;
 804
 805         if (info->attrs[NL80211_ATTR_KEY])
 806                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 807         else
 808                 err = nl80211_parse_key_old(info, k);
 809
 810         if (err)
 811                 return err;
 812
 813         if (k->def && k->defmgmt)
 814                 return -EINVAL;
 815
 816         if (k->defmgmt) {
 817                 if (k->def_uni || !k->def_multi)
 818                         return -EINVAL;
 819         }
 820
 821         if (k->idx != -1) {
 822                 if (k->defmgmt) {
 823                         if (k->idx < 4 || k->idx > 5)
 824                                 return -EINVAL;
 825                 } else if (k->def) {
 826                         if (k->idx < 0 || k->idx > 3)
 827                                 return -EINVAL;
 828                 } else {
 829                         if (k->idx < 0 || k->idx > 5)
 830                                 return -EINVAL;
 831                 }
 832         }
 833
 834         return 0;
 835 }
 836
 837 static struct cfg80211_cached_keys *
 838 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 839                        struct nlattr *keys, bool *no_ht)
 840 {
 841         struct key_parse parse;
 842         struct nlattr *key;
 843         struct cfg80211_cached_keys *result;
 844         int rem, err, def = 0;
 845
 846         result = kzalloc(sizeof(*result), GFP_KERNEL);
 847         if (!result)
 848                 return ERR_PTR(-ENOMEM);
 849
 850         result->def = -1;
 851         result->defmgmt = -1;
 852
 853         nla_for_each_nested(key, keys, rem) {
 854                 memset(&parse, 0, sizeof(parse));
 855                 parse.idx = -1;
 856
 857                 err = nl80211_parse_key_new(key, &parse);
 858                 if (err)
 859                         goto error;
 860                 err = -EINVAL;
 861                 if (!parse.p.key)
 862                         goto error;
 863                 if (parse.idx < 0 || parse.idx > 4)
 864                         goto error;
 865                 if (parse.def) {
 866                         if (def)
 867                                 goto error;
 868                         def = 1;
 869                         result->def = parse.idx;
 870                         if (!parse.def_uni || !parse.def_multi)
 871                                 goto error;
 872                 } else if (parse.defmgmt)
 873                         goto error;
 874                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 875                                                      parse.idx, false, NULL);
 876                 if (err)
 877                         goto error;
 878                 result->params[parse.idx].cipher = parse.p.cipher;
 879                 result->params[parse.idx].key_len = parse.p.key_len;
 880                 result->params[parse.idx].key = result->data[parse.idx];
 881                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 882
 883                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 884                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 885                         if (no_ht)
 886                                 *no_ht = true;
 887                 }
 888         }
 889
 890         return result;
 891  error:
 892         kfree(result);
 893         return ERR_PTR(err);
 894 }
 895
 896 static int nl80211_key_allowed(struct wireless_dev *wdev)
 897 {
 898         ASSERT_WDEV_LOCK(wdev);
 899
 900         switch (wdev->iftype) {
 901         case NL80211_IFTYPE_AP:
 902         case NL80211_IFTYPE_AP_VLAN:
 903         case NL80211_IFTYPE_P2P_GO:
 904         case NL80211_IFTYPE_MESH_POINT:
 905                 break;
 906         case NL80211_IFTYPE_ADHOC:
 907         case NL80211_IFTYPE_STATION:
 908         case NL80211_IFTYPE_P2P_CLIENT:
 909                 if (!wdev->current_bss)
 910                         return -ENOLINK;
 911                 break;
 912         case NL80211_IFTYPE_UNSPECIFIED:
 913         case NL80211_IFTYPE_OCB:
 914         case NL80211_IFTYPE_MONITOR:
 915         case NL80211_IFTYPE_P2P_DEVICE:
 916         case NL80211_IFTYPE_WDS:
 917         case NUM_NL80211_IFTYPES:
 918                 return -EINVAL;
 919         }
 920
 921         return 0;
 922 }
 923
 924 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 925                                                         struct nlattr *tb)
 926 {
 927         struct ieee80211_channel *chan;
 928
 929         if (tb == NULL)
 930                 return NULL;
 931         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 932         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 933                 return NULL;
 934         return chan;
 935 }
 936
 937 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 938 {
 939         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 940         int i;
 941
 942         if (!nl_modes)
 943                 goto nla_put_failure;
 944
 945         i = 0;
 946         while (ifmodes) {
 947                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 948                         goto nla_put_failure;
 949                 ifmodes >>= 1;
 950                 i++;
 951         }
 952
 953         nla_nest_end(msg, nl_modes);
 954         return 0;
 955
 956 nla_put_failure:
 957         return -ENOBUFS;
 958 }
 959
 960 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 961                                           struct sk_buff *msg,
 962                                           bool large)
 963 {
 964         struct nlattr *nl_combis;
 965         int i, j;
 966
 967         nl_combis = nla_nest_start(msg,
 968                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 969         if (!nl_combis)
 970                 goto nla_put_failure;
 971
 972         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 973                 const struct ieee80211_iface_combination *c;
 974                 struct nlattr *nl_combi, *nl_limits;
 975
 976                 c = &wiphy->iface_combinations[i];
 977
 978                 nl_combi = nla_nest_start(msg, i + 1);
 979                 if (!nl_combi)
 980                         goto nla_put_failure;
 981
 982                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 983                 if (!nl_limits)
 984                         goto nla_put_failure;
 985
 986                 for (j = 0; j < c->n_limits; j++) {
 987                         struct nlattr *nl_limit;
 988
 989                         nl_limit = nla_nest_start(msg, j + 1);
 990                         if (!nl_limit)
 991                                 goto nla_put_failure;
 992                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 993                                         c->limits[j].max))
 994                                 goto nla_put_failure;
 995                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 996                                                 c->limits[j].types))
 997                                 goto nla_put_failure;
 998                         nla_nest_end(msg, nl_limit);
 999                 }
1000
1001                 nla_nest_end(msg, nl_limits);
1002
1003                 if (c->beacon_int_infra_match &&
1004                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1005                         goto nla_put_failure;
1006                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1007                                 c->num_different_channels) ||
1008                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1009                                 c->max_interfaces))
1010                         goto nla_put_failure;
1011                 if (large &&
1012                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1013                                 c->radar_detect_widths) ||
1014                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1015                                 c->radar_detect_regions)))
1016                         goto nla_put_failure;
1017
1018                 nla_nest_end(msg, nl_combi);
1019         }
1020
1021         nla_nest_end(msg, nl_combis);
1022
1023         return 0;
1024 nla_put_failure:
1025         return -ENOBUFS;
1026 }
1027
1028 #ifdef CONFIG_PM
1029 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1030                                         struct sk_buff *msg)
1031 {
1032         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1033         struct nlattr *nl_tcp;
1034
1035         if (!tcp)
1036                 return 0;
1037
1038         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1039         if (!nl_tcp)
1040                 return -ENOBUFS;
1041
1042         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1043                         tcp->data_payload_max))
1044                 return -ENOBUFS;
1045
1046         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1047                         tcp->data_payload_max))
1048                 return -ENOBUFS;
1049
1050         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1051                 return -ENOBUFS;
1052
1053         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1054                                 sizeof(*tcp->tok), tcp->tok))
1055                 return -ENOBUFS;
1056
1057         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1058                         tcp->data_interval_max))
1059                 return -ENOBUFS;
1060
1061         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1062                         tcp->wake_payload_max))
1063                 return -ENOBUFS;
1064
1065         nla_nest_end(msg, nl_tcp);
1066         return 0;
1067 }
1068
1069 static int nl80211_send_wowlan(struct sk_buff *msg,
1070                                struct cfg80211_registered_device *rdev,
1071                                bool large)
1072 {
1073         struct nlattr *nl_wowlan;
1074
1075         if (!rdev->wiphy.wowlan)
1076                 return 0;
1077
1078         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1079         if (!nl_wowlan)
1080                 return -ENOBUFS;
1081
1082         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1083              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1084             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1085              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1086             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1087              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1088             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1089              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1090             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1091              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1092             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1093              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1094             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1095              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1096             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1097              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1098                 return -ENOBUFS;
1099
1100         if (rdev->wiphy.wowlan->n_patterns) {
1101                 struct nl80211_pattern_support pat = {
1102                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1103                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1104                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1105                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1106                 };
1107
1108                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1109                             sizeof(pat), &pat))
1110                         return -ENOBUFS;
1111         }
1112
1113         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1114             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1115                         rdev->wiphy.wowlan->max_nd_match_sets))
1116                 return -ENOBUFS;
1117
1118         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1119                 return -ENOBUFS;
1120
1121         nla_nest_end(msg, nl_wowlan);
1122
1123         return 0;
1124 }
1125 #endif
1126
1127 static int nl80211_send_coalesce(struct sk_buff *msg,
1128                                  struct cfg80211_registered_device *rdev)
1129 {
1130         struct nl80211_coalesce_rule_support rule;
1131
1132         if (!rdev->wiphy.coalesce)
1133                 return 0;
1134
1135         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1136         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1137         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1138         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1139         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1140         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1141
1142         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1143                 return -ENOBUFS;
1144
1145         return 0;
1146 }
1147
1148 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1149                                       struct ieee80211_supported_band *sband)
1150 {
1151         struct nlattr *nl_rates, *nl_rate;
1152         struct ieee80211_rate *rate;
1153         int i;
1154
1155         /* add HT info */
1156         if (sband->ht_cap.ht_supported &&
1157             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1158                      sizeof(sband->ht_cap.mcs),
1159                      &sband->ht_cap.mcs) ||
1160              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1161                          sband->ht_cap.cap) ||
1162              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1163                         sband->ht_cap.ampdu_factor) ||
1164              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1165                         sband->ht_cap.ampdu_density)))
1166                 return -ENOBUFS;
1167
1168         /* add VHT info */
1169         if (sband->vht_cap.vht_supported &&
1170             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1171                      sizeof(sband->vht_cap.vht_mcs),
1172                      &sband->vht_cap.vht_mcs) ||
1173              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1174                          sband->vht_cap.cap)))
1175                 return -ENOBUFS;
1176
1177         /* add bitrates */
1178         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1179         if (!nl_rates)
1180                 return -ENOBUFS;
1181
1182         for (i = 0; i < sband->n_bitrates; i++) {
1183                 nl_rate = nla_nest_start(msg, i);
1184                 if (!nl_rate)
1185                         return -ENOBUFS;
1186
1187                 rate = &sband->bitrates[i];
1188                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1189                                 rate->bitrate))
1190                         return -ENOBUFS;
1191                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1192                     nla_put_flag(msg,
1193                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1194                         return -ENOBUFS;
1195
1196                 nla_nest_end(msg, nl_rate);
1197         }
1198
1199         nla_nest_end(msg, nl_rates);
1200
1201         return 0;
1202 }
1203
1204 static int
1205 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1206                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1207 {
1208         u16 stypes;
1209         struct nlattr *nl_ftypes, *nl_ifs;
1210         enum nl80211_iftype ift;
1211         int i;
1212
1213         if (!mgmt_stypes)
1214                 return 0;
1215
1216         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1217         if (!nl_ifs)
1218                 return -ENOBUFS;
1219
1220         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1221                 nl_ftypes = nla_nest_start(msg, ift);
1222                 if (!nl_ftypes)
1223                         return -ENOBUFS;
1224                 i = 0;
1225                 stypes = mgmt_stypes[ift].tx;
1226                 while (stypes) {
1227                         if ((stypes & 1) &&
1228                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1229                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1230                                 return -ENOBUFS;
1231                         stypes >>= 1;
1232                         i++;
1233                 }
1234                 nla_nest_end(msg, nl_ftypes);
1235         }
1236
1237         nla_nest_end(msg, nl_ifs);
1238
1239         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1240         if (!nl_ifs)
1241                 return -ENOBUFS;
1242
1243         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1244                 nl_ftypes = nla_nest_start(msg, ift);
1245                 if (!nl_ftypes)
1246                         return -ENOBUFS;
1247                 i = 0;
1248                 stypes = mgmt_stypes[ift].rx;
1249                 while (stypes) {
1250                         if ((stypes & 1) &&
1251                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1252                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1253                                 return -ENOBUFS;
1254                         stypes >>= 1;
1255                         i++;
1256                 }
1257                 nla_nest_end(msg, nl_ftypes);
1258         }
1259         nla_nest_end(msg, nl_ifs);
1260
1261         return 0;
1262 }
1263
1264 struct nl80211_dump_wiphy_state {
1265         s64 filter_wiphy;
1266         long start;
1267         long split_start, band_start, chan_start;
1268         bool split;
1269 };
1270
1271 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1272                               enum nl80211_commands cmd,
1273                               struct sk_buff *msg, u32 portid, u32 seq,
1274                               int flags, struct nl80211_dump_wiphy_state *state)
1275 {
1276         void *hdr;
1277         struct nlattr *nl_bands, *nl_band;
1278         struct nlattr *nl_freqs, *nl_freq;
1279         struct nlattr *nl_cmds;
1280         enum nl80211_band band;
1281         struct ieee80211_channel *chan;
1282         int i;
1283         const struct ieee80211_txrx_stypes *mgmt_stypes =
1284                                 rdev->wiphy.mgmt_stypes;
1285         u32 features;
1286
1287         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1288         if (!hdr)
1289                 return -ENOBUFS;
1290
1291         if (WARN_ON(!state))
1292                 return -EINVAL;
1293
1294         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1295             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1296                            wiphy_name(&rdev->wiphy)) ||
1297             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1298                         cfg80211_rdev_list_generation))
1299                 goto nla_put_failure;
1300
1301         if (cmd != NL80211_CMD_NEW_WIPHY)
1302                 goto finish;
1303
1304         switch (state->split_start) {
1305         case 0:
1306                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1307                                rdev->wiphy.retry_short) ||
1308                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1309                                rdev->wiphy.retry_long) ||
1310                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1311                                 rdev->wiphy.frag_threshold) ||
1312                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1313                                 rdev->wiphy.rts_threshold) ||
1314                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1315                                rdev->wiphy.coverage_class) ||
1316                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1317                                rdev->wiphy.max_scan_ssids) ||
1318                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1319                                rdev->wiphy.max_sched_scan_ssids) ||
1320                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1321                                 rdev->wiphy.max_scan_ie_len) ||
1322                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1323                                 rdev->wiphy.max_sched_scan_ie_len) ||
1324                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1325                                rdev->wiphy.max_match_sets) ||
1326                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1327                                 rdev->wiphy.max_sched_scan_plans) ||
1328                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1329                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1330                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1331                                 rdev->wiphy.max_sched_scan_plan_iterations))
1332                         goto nla_put_failure;
1333
1334                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1335                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1336                         goto nla_put_failure;
1337                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1338                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1339                         goto nla_put_failure;
1340                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1341                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1342                         goto nla_put_failure;
1343                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1344                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1345                         goto nla_put_failure;
1346                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1347                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1348                         goto nla_put_failure;
1349                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1350                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1351                         goto nla_put_failure;
1352                 state->split_start++;
1353                 if (state->split)
1354                         break;
1355         case 1:
1356                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1357                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1358                             rdev->wiphy.cipher_suites))
1359                         goto nla_put_failure;
1360
1361                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1362                                rdev->wiphy.max_num_pmkids))
1363                         goto nla_put_failure;
1364
1365                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1366                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1367                         goto nla_put_failure;
1368
1369                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1370                                 rdev->wiphy.available_antennas_tx) ||
1371                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1372                                 rdev->wiphy.available_antennas_rx))
1373                         goto nla_put_failure;
1374
1375                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1376                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1377                                 rdev->wiphy.probe_resp_offload))
1378                         goto nla_put_failure;
1379
1380                 if ((rdev->wiphy.available_antennas_tx ||
1381                      rdev->wiphy.available_antennas_rx) &&
1382                     rdev->ops->get_antenna) {
1383                         u32 tx_ant = 0, rx_ant = 0;
1384                         int res;
1385                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1386                         if (!res) {
1387                                 if (nla_put_u32(msg,
1388                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1389                                                 tx_ant) ||
1390                                     nla_put_u32(msg,
1391                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1392                                                 rx_ant))
1393                                         goto nla_put_failure;
1394                         }
1395                 }
1396
1397                 state->split_start++;
1398                 if (state->split)
1399                         break;
1400         case 2:
1401                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1402                                         rdev->wiphy.interface_modes))
1403                                 goto nla_put_failure;
1404                 state->split_start++;
1405                 if (state->split)
1406                         break;
1407         case 3:
1408                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1409                 if (!nl_bands)
1410                         goto nla_put_failure;
1411
1412                 for (band = state->band_start;
1413                      band < NUM_NL80211_BANDS; band++) {
1414                         struct ieee80211_supported_band *sband;
1415
1416                         sband = rdev->wiphy.bands[band];
1417
1418                         if (!sband)
1419                                 continue;
1420
1421                         nl_band = nla_nest_start(msg, band);
1422                         if (!nl_band)
1423                                 goto nla_put_failure;
1424
1425                         switch (state->chan_start) {
1426                         case 0:
1427                                 if (nl80211_send_band_rateinfo(msg, sband))
1428                                         goto nla_put_failure;
1429                                 state->chan_start++;
1430                                 if (state->split)
1431                                         break;
1432                         default:
1433                                 /* add frequencies */
1434                                 nl_freqs = nla_nest_start(
1435                                         msg, NL80211_BAND_ATTR_FREQS);
1436                                 if (!nl_freqs)
1437                                         goto nla_put_failure;
1438
1439                                 for (i = state->chan_start - 1;
1440                                      i < sband->n_channels;
1441                                      i++) {
1442                                         nl_freq = nla_nest_start(msg, i);
1443                                         if (!nl_freq)
1444                                                 goto nla_put_failure;
1445
1446                                         chan = &sband->channels[i];
1447
1448                                         if (nl80211_msg_put_channel(
1449                                                         msg, chan,
1450                                                         state->split))
1451                                                 goto nla_put_failure;
1452
1453                                         nla_nest_end(msg, nl_freq);
1454                                         if (state->split)
1455                                                 break;
1456                                 }
1457                                 if (i < sband->n_channels)
1458                                         state->chan_start = i + 2;
1459                                 else
1460                                         state->chan_start = 0;
1461                                 nla_nest_end(msg, nl_freqs);
1462                         }
1463
1464                         nla_nest_end(msg, nl_band);
1465
1466                         if (state->split) {
1467                                 /* start again here */
1468                                 if (state->chan_start)
1469                                         band--;
1470                                 break;
1471                         }
1472                 }
1473                 nla_nest_end(msg, nl_bands);
1474
1475                 if (band < NUM_NL80211_BANDS)
1476                         state->band_start = band + 1;
1477                 else
1478                         state->band_start = 0;
1479
1480                 /* if bands & channels are done, continue outside */
1481                 if (state->band_start == 0 && state->chan_start == 0)
1482                         state->split_start++;
1483                 if (state->split)
1484                         break;
1485         case 4:
1486                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1487                 if (!nl_cmds)
1488                         goto nla_put_failure;
1489
1490                 i = 0;
1491 #define CMD(op, n)                                                      \
1492                  do {                                                   \
1493                         if (rdev->ops->op) {                            \
1494                                 i++;                                    \
1495                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1496                                         goto nla_put_failure;           \
1497                         }                                               \
1498                 } while (0)
1499
1500                 CMD(add_virtual_intf, NEW_INTERFACE);
1501                 CMD(change_virtual_intf, SET_INTERFACE);
1502                 CMD(add_key, NEW_KEY);
1503                 CMD(start_ap, START_AP);
1504                 CMD(add_station, NEW_STATION);
1505                 CMD(add_mpath, NEW_MPATH);
1506                 CMD(update_mesh_config, SET_MESH_CONFIG);
1507                 CMD(change_bss, SET_BSS);
1508                 CMD(auth, AUTHENTICATE);
1509                 CMD(assoc, ASSOCIATE);
1510                 CMD(deauth, DEAUTHENTICATE);
1511                 CMD(disassoc, DISASSOCIATE);
1512                 CMD(join_ibss, JOIN_IBSS);
1513                 CMD(join_mesh, JOIN_MESH);
1514                 CMD(set_pmksa, SET_PMKSA);
1515                 CMD(del_pmksa, DEL_PMKSA);
1516                 CMD(flush_pmksa, FLUSH_PMKSA);
1517                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1518                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1519                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1520                 CMD(mgmt_tx, FRAME);
1521                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1522                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1523                         i++;
1524                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1525                                 goto nla_put_failure;
1526                 }
1527                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1528                     rdev->ops->join_mesh) {
1529                         i++;
1530                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1531                                 goto nla_put_failure;
1532                 }
1533                 CMD(set_wds_peer, SET_WDS_PEER);
1534                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1535                         CMD(tdls_mgmt, TDLS_MGMT);
1536                         CMD(tdls_oper, TDLS_OPER);
1537                 }
1538                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1539                         CMD(sched_scan_start, START_SCHED_SCAN);
1540                 CMD(probe_client, PROBE_CLIENT);
1541                 CMD(set_noack_map, SET_NOACK_MAP);
1542                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1543                         i++;
1544                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1545                                 goto nla_put_failure;
1546                 }
1547                 CMD(start_p2p_device, START_P2P_DEVICE);
1548                 CMD(set_mcast_rate, SET_MCAST_RATE);
1549 #ifdef CONFIG_NL80211_TESTMODE
1550                 CMD(testmode_cmd, TESTMODE);
1551 #endif
1552                 if (state->split) {
1553                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1554                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1555                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1556                                 CMD(channel_switch, CHANNEL_SWITCH);
1557                         CMD(set_qos_map, SET_QOS_MAP);
1558                         if (rdev->wiphy.features &
1559                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1560                                 CMD(add_tx_ts, ADD_TX_TS);
1561                 }
1562                 /* add into the if now */
1563 #undef CMD
1564
1565                 if (rdev->ops->connect || rdev->ops->auth) {
1566                         i++;
1567                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1568                                 goto nla_put_failure;
1569                 }
1570
1571                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1572                         i++;
1573                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1574                                 goto nla_put_failure;
1575                 }
1576
1577                 nla_nest_end(msg, nl_cmds);
1578                 state->split_start++;
1579                 if (state->split)
1580                         break;
1581         case 5:
1582                 if (rdev->ops->remain_on_channel &&
1583                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1584                     nla_put_u32(msg,
1585                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1586                                 rdev->wiphy.max_remain_on_channel_duration))
1587                         goto nla_put_failure;
1588
1589                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1590                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1591                         goto nla_put_failure;
1592
1593                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1594                         goto nla_put_failure;
1595                 state->split_start++;
1596                 if (state->split)
1597                         break;
1598         case 6:
1599 #ifdef CONFIG_PM
1600                 if (nl80211_send_wowlan(msg, rdev, state->split))
1601                         goto nla_put_failure;
1602                 state->split_start++;
1603                 if (state->split)
1604                         break;
1605 #else
1606                 state->split_start++;
1607 #endif
1608         case 7:
1609                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1610                                         rdev->wiphy.software_iftypes))
1611                         goto nla_put_failure;
1612
1613                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1614                                                    state->split))
1615                         goto nla_put_failure;
1616
1617                 state->split_start++;
1618                 if (state->split)
1619                         break;
1620         case 8:
1621                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1622                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1623                                 rdev->wiphy.ap_sme_capa))
1624                         goto nla_put_failure;
1625
1626                 features = rdev->wiphy.features;
1627                 /*
1628                  * We can only add the per-channel limit information if the
1629                  * dump is split, otherwise it makes it too big. Therefore
1630                  * only advertise it in that case.
1631                  */
1632                 if (state->split)
1633                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1634                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1635                         goto nla_put_failure;
1636
1637                 if (rdev->wiphy.ht_capa_mod_mask &&
1638                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1639                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1640                             rdev->wiphy.ht_capa_mod_mask))
1641                         goto nla_put_failure;
1642
1643                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1644                     rdev->wiphy.max_acl_mac_addrs &&
1645                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1646                                 rdev->wiphy.max_acl_mac_addrs))
1647                         goto nla_put_failure;
1648
1649                 /*
1650                  * Any information below this point is only available to
1651                  * applications that can deal with it being split. This
1652                  * helps ensure that newly added capabilities don't break
1653                  * older tools by overrunning their buffers.
1654                  *
1655                  * We still increment split_start so that in the split
1656                  * case we'll continue with more data in the next round,
1657                  * but break unconditionally so unsplit data stops here.
1658                  */
1659                 state->split_start++;
1660                 break;
1661         case 9:
1662                 if (rdev->wiphy.extended_capabilities &&
1663                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1664                              rdev->wiphy.extended_capabilities_len,
1665                              rdev->wiphy.extended_capabilities) ||
1666                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1667                              rdev->wiphy.extended_capabilities_len,
1668                              rdev->wiphy.extended_capabilities_mask)))
1669                         goto nla_put_failure;
1670
1671                 if (rdev->wiphy.vht_capa_mod_mask &&
1672                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1673                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1674                             rdev->wiphy.vht_capa_mod_mask))
1675                         goto nla_put_failure;
1676
1677                 state->split_start++;
1678                 break;
1679         case 10:
1680                 if (nl80211_send_coalesce(msg, rdev))
1681                         goto nla_put_failure;
1682
1683                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1684                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1685                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1686                         goto nla_put_failure;
1687
1688                 if (rdev->wiphy.max_ap_assoc_sta &&
1689                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1690                                 rdev->wiphy.max_ap_assoc_sta))
1691                         goto nla_put_failure;
1692
1693                 state->split_start++;
1694                 break;
1695         case 11:
1696                 if (rdev->wiphy.n_vendor_commands) {
1697                         const struct nl80211_vendor_cmd_info *info;
1698                         struct nlattr *nested;
1699
1700                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1701                         if (!nested)
1702                                 goto nla_put_failure;
1703
1704                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1705                                 info = &rdev->wiphy.vendor_commands[i].info;
1706                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1707                                         goto nla_put_failure;
1708                         }
1709                         nla_nest_end(msg, nested);
1710                 }
1711
1712                 if (rdev->wiphy.n_vendor_events) {
1713                         const struct nl80211_vendor_cmd_info *info;
1714                         struct nlattr *nested;
1715
1716                         nested = nla_nest_start(msg,
1717                                                 NL80211_ATTR_VENDOR_EVENTS);
1718                         if (!nested)
1719                                 goto nla_put_failure;
1720
1721                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1722                                 info = &rdev->wiphy.vendor_events[i];
1723                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1724                                         goto nla_put_failure;
1725                         }
1726                         nla_nest_end(msg, nested);
1727                 }
1728                 state->split_start++;
1729                 break;
1730         case 12:
1731                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1732                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1733                                rdev->wiphy.max_num_csa_counters))
1734                         goto nla_put_failure;
1735
1736                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1737                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1738                         goto nla_put_failure;
1739
1740                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1741                             sizeof(rdev->wiphy.ext_features),
1742                             rdev->wiphy.ext_features))
1743                         goto nla_put_failure;
1744
1745                 if (rdev->wiphy.bss_select_support) {
1746                         struct nlattr *nested;
1747                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1748
1749                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1750                         if (!nested)
1751                                 goto nla_put_failure;
1752
1753                         i = 0;
1754                         while (bss_select_support) {
1755                                 if ((bss_select_support & 1) &&
1756                                     nla_put_flag(msg, i))
1757                                         goto nla_put_failure;
1758                                 i++;
1759                                 bss_select_support >>= 1;
1760                         }
1761                         nla_nest_end(msg, nested);
1762                 }
1763
1764                 /* done */
1765                 state->split_start = 0;
1766                 break;
1767         }
1768  finish:
1769         genlmsg_end(msg, hdr);
1770         return 0;
1771
1772  nla_put_failure:
1773         genlmsg_cancel(msg, hdr);
1774         return -EMSGSIZE;
1775 }
1776
1777 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1778                                     struct netlink_callback *cb,
1779                                     struct nl80211_dump_wiphy_state *state)
1780 {
1781         struct nlattr **tb = nl80211_fam.attrbuf;
1782         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1783                               tb, nl80211_fam.maxattr, nl80211_policy);
1784         /* ignore parse errors for backward compatibility */
1785         if (ret)
1786                 return 0;
1787
1788         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1789         if (tb[NL80211_ATTR_WIPHY])
1790                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1791         if (tb[NL80211_ATTR_WDEV])
1792                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1793         if (tb[NL80211_ATTR_IFINDEX]) {
1794                 struct net_device *netdev;
1795                 struct cfg80211_registered_device *rdev;
1796                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1797
1798                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1799                 if (!netdev)
1800                         return -ENODEV;
1801                 if (netdev->ieee80211_ptr) {
1802                         rdev = wiphy_to_rdev(
1803                                 netdev->ieee80211_ptr->wiphy);
1804                         state->filter_wiphy = rdev->wiphy_idx;
1805                 }
1806         }
1807
1808         return 0;
1809 }
1810
1811 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1812 {
1813         int idx = 0, ret;
1814         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1815         struct cfg80211_registered_device *rdev;
1816
1817         rtnl_lock();
1818         if (!state) {
1819                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1820                 if (!state) {
1821                         rtnl_unlock();
1822                         return -ENOMEM;
1823                 }
1824                 state->filter_wiphy = -1;
1825                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1826                 if (ret) {
1827                         kfree(state);
1828                         rtnl_unlock();
1829                         return ret;
1830                 }
1831                 cb->args[0] = (long)state;
1832         }
1833
1834         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1835                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1836                         continue;
1837                 if (++idx <= state->start)
1838                         continue;
1839                 if (state->filter_wiphy != -1 &&
1840                     state->filter_wiphy != rdev->wiphy_idx)
1841                         continue;
1842                 /* attempt to fit multiple wiphy data chunks into the skb */
1843                 do {
1844                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1845                                                  skb,
1846                                                  NETLINK_CB(cb->skb).portid,
1847                                                  cb->nlh->nlmsg_seq,
1848                                                  NLM_F_MULTI, state);
1849                         if (ret < 0) {
1850                                 /*
1851                                  * If sending the wiphy data didn't fit (ENOBUFS
1852                                  * or EMSGSIZE returned), this SKB is still
1853                                  * empty (so it's not too big because another
1854                                  * wiphy dataset is already in the skb) and
1855                                  * we've not tried to adjust the dump allocation
1856                                  * yet ... then adjust the alloc size to be
1857                                  * bigger, and return 1 but with the empty skb.
1858                                  * This results in an empty message being RX'ed
1859                                  * in userspace, but that is ignored.
1860                                  *
1861                                  * We can then retry with the larger buffer.
1862                                  */
1863                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1864                                     !skb->len && !state->split &&
1865                                     cb->min_dump_alloc < 4096) {
1866                                         cb->min_dump_alloc = 4096;
1867                                         state->split_start = 0;
1868                                         rtnl_unlock();
1869                                         return 1;
1870                                 }
1871                                 idx--;
1872                                 break;
1873                         }
1874                 } while (state->split_start > 0);
1875                 break;
1876         }
1877         rtnl_unlock();
1878
1879         state->start = idx;
1880
1881         return skb->len;
1882 }
1883
1884 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1885 {
1886         kfree((void *)cb->args[0]);
1887         return 0;
1888 }
1889
1890 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1891 {
1892         struct sk_buff *msg;
1893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1894         struct nl80211_dump_wiphy_state state = {};
1895
1896         msg = nlmsg_new(4096, GFP_KERNEL);
1897         if (!msg)
1898                 return -ENOMEM;
1899
1900         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1901                                info->snd_portid, info->snd_seq, 0,
1902                                &state) < 0) {
1903                 nlmsg_free(msg);
1904                 return -ENOBUFS;
1905         }
1906
1907         return genlmsg_reply(msg, info);
1908 }
1909
1910 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1911         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1912         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1913         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1914         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1915         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1916 };
1917
1918 static int parse_txq_params(struct nlattr *tb[],
1919                             struct ieee80211_txq_params *txq_params)
1920 {
1921         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1922             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1923             !tb[NL80211_TXQ_ATTR_AIFS])
1924                 return -EINVAL;
1925
1926         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1927         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1928         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1929         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1930         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1931
1932         if (txq_params->ac >= NL80211_NUM_ACS)
1933                 return -EINVAL;
1934
1935         return 0;
1936 }
1937
1938 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1939 {
1940         /*
1941          * You can only set the channel explicitly for WDS interfaces,
1942          * all others have their channel managed via their respective
1943          * "establish a connection" command (connect, join, ...)
1944          *
1945          * For AP/GO and mesh mode, the channel can be set with the
1946          * channel userspace API, but is only stored and passed to the
1947          * low-level driver when the AP starts or the mesh is joined.
1948          * This is for backward compatibility, userspace can also give
1949          * the channel in the start-ap or join-mesh commands instead.
1950          *
1951          * Monitors are special as they are normally slaved to
1952          * whatever else is going on, so they have their own special
1953          * operation to set the monitor channel if possible.
1954          */
1955         return !wdev ||
1956                 wdev->iftype == NL80211_IFTYPE_AP ||
1957                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1958                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1959                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1960 }
1961
1962 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1963                                  struct genl_info *info,
1964                                  struct cfg80211_chan_def *chandef)
1965 {
1966         u32 control_freq;
1967
1968         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1969                 return -EINVAL;
1970
1971         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1972
1973         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1974         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1975         chandef->center_freq1 = control_freq;
1976         chandef->center_freq2 = 0;
1977
1978         /* Primary channel not allowed */
1979         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1980                 return -EINVAL;
1981
1982         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1983                 enum nl80211_channel_type chantype;
1984
1985                 chantype = nla_get_u32(
1986                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1987
1988                 switch (chantype) {
1989                 case NL80211_CHAN_NO_HT:
1990                 case NL80211_CHAN_HT20:
1991                 case NL80211_CHAN_HT40PLUS:
1992                 case NL80211_CHAN_HT40MINUS:
1993                         cfg80211_chandef_create(chandef, chandef->chan,
1994                                                 chantype);
1995                         break;
1996                 default:
1997                         return -EINVAL;
1998                 }
1999         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2000                 chandef->width =
2001                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2002                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2003                         chandef->center_freq1 =
2004                                 nla_get_u32(
2005                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2006                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2007                         chandef->center_freq2 =
2008                                 nla_get_u32(
2009                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2010         }
2011
2012         if (!cfg80211_chandef_valid(chandef))
2013                 return -EINVAL;
2014
2015         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2016                                      IEEE80211_CHAN_DISABLED))
2017                 return -EINVAL;
2018
2019         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2020              chandef->width == NL80211_CHAN_WIDTH_10) &&
2021             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2022                 return -EINVAL;
2023
2024         return 0;
2025 }
2026
2027 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2028                                  struct net_device *dev,
2029                                  struct genl_info *info)
2030 {
2031         struct cfg80211_chan_def chandef;
2032         int result;
2033         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2034         struct wireless_dev *wdev = NULL;
2035
2036         if (dev)
2037                 wdev = dev->ieee80211_ptr;
2038         if (!nl80211_can_set_dev_channel(wdev))
2039                 return -EOPNOTSUPP;
2040         if (wdev)
2041                 iftype = wdev->iftype;
2042
2043         result = nl80211_parse_chandef(rdev, info, &chandef);
2044         if (result)
2045                 return result;
2046
2047         switch (iftype) {
2048         case NL80211_IFTYPE_AP:
2049         case NL80211_IFTYPE_P2P_GO:
2050                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2051                                                    iftype)) {
2052                         result = -EINVAL;
2053                         break;
2054                 }
2055                 if (wdev->beacon_interval) {
2056                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2057                             !(rdev->wiphy.features &
2058                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2059                                 result = -EBUSY;
2060                                 break;
2061                         }
2062
2063                         /* Only allow dynamic channel width changes */
2064                         if (chandef.chan != wdev->preset_chandef.chan) {
2065                                 result = -EBUSY;
2066                                 break;
2067                         }
2068                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2069                         if (result)
2070                                 break;
2071                 }
2072                 wdev->preset_chandef = chandef;
2073                 result = 0;
2074                 break;
2075         case NL80211_IFTYPE_MESH_POINT:
2076                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2077                 break;
2078         case NL80211_IFTYPE_MONITOR:
2079                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2080                 break;
2081         default:
2082                 result = -EINVAL;
2083         }
2084
2085         return result;
2086 }
2087
2088 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2089 {
2090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2091         struct net_device *netdev = info->user_ptr[1];
2092
2093         return __nl80211_set_channel(rdev, netdev, info);
2094 }
2095
2096 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2097 {
2098         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2099         struct net_device *dev = info->user_ptr[1];
2100         struct wireless_dev *wdev = dev->ieee80211_ptr;
2101         const u8 *bssid;
2102
2103         if (!info->attrs[NL80211_ATTR_MAC])
2104                 return -EINVAL;
2105
2106         if (netif_running(dev))
2107                 return -EBUSY;
2108
2109         if (!rdev->ops->set_wds_peer)
2110                 return -EOPNOTSUPP;
2111
2112         if (wdev->iftype != NL80211_IFTYPE_WDS)
2113                 return -EOPNOTSUPP;
2114
2115         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2116         return rdev_set_wds_peer(rdev, dev, bssid);
2117 }
2118
2119
2120 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2121 {
2122         struct cfg80211_registered_device *rdev;
2123         struct net_device *netdev = NULL;
2124         struct wireless_dev *wdev;
2125         int result = 0, rem_txq_params = 0;
2126         struct nlattr *nl_txq_params;
2127         u32 changed;
2128         u8 retry_short = 0, retry_long = 0;
2129         u32 frag_threshold = 0, rts_threshold = 0;
2130         u8 coverage_class = 0;
2131
2132         ASSERT_RTNL();
2133
2134         /*
2135          * Try to find the wiphy and netdev. Normally this
2136          * function shouldn't need the netdev, but this is
2137          * done for backward compatibility -- previously
2138          * setting the channel was done per wiphy, but now
2139          * it is per netdev. Previous userland like hostapd
2140          * also passed a netdev to set_wiphy, so that it is
2141          * possible to let that go to the right netdev!
2142          */
2143
2144         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2145                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2146
2147                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2148                 if (netdev && netdev->ieee80211_ptr)
2149                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2150                 else
2151                         netdev = NULL;
2152         }
2153
2154         if (!netdev) {
2155                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2156                                                   info->attrs);
2157                 if (IS_ERR(rdev))
2158                         return PTR_ERR(rdev);
2159                 wdev = NULL;
2160                 netdev = NULL;
2161                 result = 0;
2162         } else
2163                 wdev = netdev->ieee80211_ptr;
2164
2165         /*
2166          * end workaround code, by now the rdev is available
2167          * and locked, and wdev may or may not be NULL.
2168          */
2169
2170         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2171                 result = cfg80211_dev_rename(
2172                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2173
2174         if (result)
2175                 return result;
2176
2177         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2178                 struct ieee80211_txq_params txq_params;
2179                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2180
2181                 if (!rdev->ops->set_txq_params)
2182                         return -EOPNOTSUPP;
2183
2184                 if (!netdev)
2185                         return -EINVAL;
2186
2187                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2188                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2189                         return -EINVAL;
2190
2191                 if (!netif_running(netdev))
2192                         return -ENETDOWN;
2193
2194                 nla_for_each_nested(nl_txq_params,
2195                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2196                                     rem_txq_params) {
2197                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2198                                            nla_data(nl_txq_params),
2199                                            nla_len(nl_txq_params),
2200                                            txq_params_policy);
2201                         if (result)
2202                                 return result;
2203                         result = parse_txq_params(tb, &txq_params);
2204                         if (result)
2205                                 return result;
2206
2207                         result = rdev_set_txq_params(rdev, netdev,
2208                                                      &txq_params);
2209                         if (result)
2210                                 return result;
2211                 }
2212         }
2213
2214         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2215                 result = __nl80211_set_channel(
2216                         rdev,
2217                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2218                         info);
2219                 if (result)
2220                         return result;
2221         }
2222
2223         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2224                 struct wireless_dev *txp_wdev = wdev;
2225                 enum nl80211_tx_power_setting type;
2226                 int idx, mbm = 0;
2227
2228                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2229                         txp_wdev = NULL;
2230
2231                 if (!rdev->ops->set_tx_power)
2232                         return -EOPNOTSUPP;
2233
2234                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2235                 type = nla_get_u32(info->attrs[idx]);
2236
2237                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2238                     (type != NL80211_TX_POWER_AUTOMATIC))
2239                         return -EINVAL;
2240
2241                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2242                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2243                         mbm = nla_get_u32(info->attrs[idx]);
2244                 }
2245
2246                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2247                 if (result)
2248                         return result;
2249         }
2250
2251         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2252             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2253                 u32 tx_ant, rx_ant;
2254                 if ((!rdev->wiphy.available_antennas_tx &&
2255                      !rdev->wiphy.available_antennas_rx) ||
2256                     !rdev->ops->set_antenna)
2257                         return -EOPNOTSUPP;
2258
2259                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2260                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2261
2262                 /* reject antenna configurations which don't match the
2263                  * available antenna masks, except for the "all" mask */
2264                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2265                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2266                         return -EINVAL;
2267
2268                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2269                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2270
2271                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2272                 if (result)
2273                         return result;
2274         }
2275
2276         changed = 0;
2277
2278         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2279                 retry_short = nla_get_u8(
2280                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2281                 if (retry_short == 0)
2282                         return -EINVAL;
2283
2284                 changed |= WIPHY_PARAM_RETRY_SHORT;
2285         }
2286
2287         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2288                 retry_long = nla_get_u8(
2289                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2290                 if (retry_long == 0)
2291                         return -EINVAL;
2292
2293                 changed |= WIPHY_PARAM_RETRY_LONG;
2294         }
2295
2296         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2297                 frag_threshold = nla_get_u32(
2298                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2299                 if (frag_threshold < 256)
2300                         return -EINVAL;
2301
2302                 if (frag_threshold != (u32) -1) {
2303                         /*
2304                          * Fragments (apart from the last one) are required to
2305                          * have even length. Make the fragmentation code
2306                          * simpler by stripping LSB should someone try to use
2307                          * odd threshold value.
2308                          */
2309                         frag_threshold &= ~0x1;
2310                 }
2311                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2312         }
2313
2314         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2315                 rts_threshold = nla_get_u32(
2316                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2317                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2318         }
2319
2320         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2321                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2322                         return -EINVAL;
2323
2324                 coverage_class = nla_get_u8(
2325                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2326                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2327         }
2328
2329         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2330                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2331                         return -EOPNOTSUPP;
2332
2333                 changed |= WIPHY_PARAM_DYN_ACK;
2334         }
2335
2336         if (changed) {
2337                 u8 old_retry_short, old_retry_long;
2338                 u32 old_frag_threshold, old_rts_threshold;
2339                 u8 old_coverage_class;
2340
2341                 if (!rdev->ops->set_wiphy_params)
2342                         return -EOPNOTSUPP;
2343
2344                 old_retry_short = rdev->wiphy.retry_short;
2345                 old_retry_long = rdev->wiphy.retry_long;
2346                 old_frag_threshold = rdev->wiphy.frag_threshold;
2347                 old_rts_threshold = rdev->wiphy.rts_threshold;
2348                 old_coverage_class = rdev->wiphy.coverage_class;
2349
2350                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2351                         rdev->wiphy.retry_short = retry_short;
2352                 if (changed & WIPHY_PARAM_RETRY_LONG)
2353                         rdev->wiphy.retry_long = retry_long;
2354                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2355                         rdev->wiphy.frag_threshold = frag_threshold;
2356                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2357                         rdev->wiphy.rts_threshold = rts_threshold;
2358                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2359                         rdev->wiphy.coverage_class = coverage_class;
2360
2361                 result = rdev_set_wiphy_params(rdev, changed);
2362                 if (result) {
2363                         rdev->wiphy.retry_short = old_retry_short;
2364                         rdev->wiphy.retry_long = old_retry_long;
2365                         rdev->wiphy.frag_threshold = old_frag_threshold;
2366                         rdev->wiphy.rts_threshold = old_rts_threshold;
2367                         rdev->wiphy.coverage_class = old_coverage_class;
2368                         return result;
2369                 }
2370         }
2371         return 0;
2372 }
2373
2374 static inline u64 wdev_id(struct wireless_dev *wdev)
2375 {
2376         return (u64)wdev->identifier |
2377                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2378 }
2379
2380 static int nl80211_send_chandef(struct sk_buff *msg,
2381                                 const struct cfg80211_chan_def *chandef)
2382 {
2383         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2384                 return -EINVAL;
2385
2386         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2387                         chandef->chan->center_freq))
2388                 return -ENOBUFS;
2389         switch (chandef->width) {
2390         case NL80211_CHAN_WIDTH_20_NOHT:
2391         case NL80211_CHAN_WIDTH_20:
2392         case NL80211_CHAN_WIDTH_40:
2393                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2394                                 cfg80211_get_chandef_type(chandef)))
2395                         return -ENOBUFS;
2396                 break;
2397         default:
2398                 break;
2399         }
2400         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2401                 return -ENOBUFS;
2402         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2403                 return -ENOBUFS;
2404         if (chandef->center_freq2 &&
2405             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2406                 return -ENOBUFS;
2407         return 0;
2408 }
2409
2410 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2411                               struct cfg80211_registered_device *rdev,
2412                               struct wireless_dev *wdev, bool removal)
2413 {
2414         struct net_device *dev = wdev->netdev;
2415         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2416         void *hdr;
2417
2418         if (removal)
2419                 cmd = NL80211_CMD_DEL_INTERFACE;
2420
2421         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2422         if (!hdr)
2423                 return -1;
2424
2425         if (dev &&
2426             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2427              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2428                 goto nla_put_failure;
2429
2430         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2431             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2432             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2433                               NL80211_ATTR_PAD) ||
2434             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2435             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2436                         rdev->devlist_generation ^
2437                         (cfg80211_rdev_list_generation << 2)))
2438                 goto nla_put_failure;
2439
2440         if (rdev->ops->get_channel) {
2441                 int ret;
2442                 struct cfg80211_chan_def chandef;
2443
2444                 ret = rdev_get_channel(rdev, wdev, &chandef);
2445                 if (ret == 0) {
2446                         if (nl80211_send_chandef(msg, &chandef))
2447                                 goto nla_put_failure;
2448                 }
2449         }
2450
2451         if (rdev->ops->get_tx_power) {
2452                 int dbm, ret;
2453
2454                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2455                 if (ret == 0 &&
2456                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2457                                 DBM_TO_MBM(dbm)))
2458                         goto nla_put_failure;
2459         }
2460
2461         if (wdev->ssid_len) {
2462                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2463                         goto nla_put_failure;
2464         }
2465
2466         genlmsg_end(msg, hdr);
2467         return 0;
2468
2469  nla_put_failure:
2470         genlmsg_cancel(msg, hdr);
2471         return -EMSGSIZE;
2472 }
2473
2474 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2475 {
2476         int wp_idx = 0;
2477         int if_idx = 0;
2478         int wp_start = cb->args[0];
2479         int if_start = cb->args[1];
2480         struct cfg80211_registered_device *rdev;
2481         struct wireless_dev *wdev;
2482
2483         rtnl_lock();
2484         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2485                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2486                         continue;
2487                 if (wp_idx < wp_start) {
2488                         wp_idx++;
2489                         continue;
2490                 }
2491                 if_idx = 0;
2492
2493                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2494                         if (if_idx < if_start) {
2495                                 if_idx++;
2496                                 continue;
2497                         }
2498                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2499                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2500                                                rdev, wdev, false) < 0) {
2501                                 goto out;
2502                         }
2503                         if_idx++;
2504                 }
2505
2506                 wp_idx++;
2507         }
2508  out:
2509         rtnl_unlock();
2510
2511         cb->args[0] = wp_idx;
2512         cb->args[1] = if_idx;
2513
2514         return skb->len;
2515 }
2516
2517 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2518 {
2519         struct sk_buff *msg;
2520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2521         struct wireless_dev *wdev = info->user_ptr[1];
2522
2523         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2524         if (!msg)
2525                 return -ENOMEM;
2526
2527         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2528                                rdev, wdev, false) < 0) {
2529                 nlmsg_free(msg);
2530                 return -ENOBUFS;
2531         }
2532
2533         return genlmsg_reply(msg, info);
2534 }
2535
2536 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2537         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2538         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2539         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2540         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2541         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2542         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2543 };
2544
2545 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2546 {
2547         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2548         int flag;
2549
2550         *mntrflags = 0;
2551
2552         if (!nla)
2553                 return -EINVAL;
2554
2555         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2556                              nla, mntr_flags_policy))
2557                 return -EINVAL;
2558
2559         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2560                 if (flags[flag])
2561                         *mntrflags |= (1<<flag);
2562
2563         return 0;
2564 }
2565
2566 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2567                                struct net_device *netdev, u8 use_4addr,
2568                                enum nl80211_iftype iftype)
2569 {
2570         if (!use_4addr) {
2571                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2572                         return -EBUSY;
2573                 return 0;
2574         }
2575
2576         switch (iftype) {
2577         case NL80211_IFTYPE_AP_VLAN:
2578                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2579                         return 0;
2580                 break;
2581         case NL80211_IFTYPE_STATION:
2582                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2583                         return 0;
2584                 break;
2585         default:
2586                 break;
2587         }
2588
2589         return -EOPNOTSUPP;
2590 }
2591
2592 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2593 {
2594         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2595         struct vif_params params;
2596         int err;
2597         enum nl80211_iftype otype, ntype;
2598         struct net_device *dev = info->user_ptr[1];
2599         u32 _flags, *flags = NULL;
2600         bool change = false;
2601
2602         memset(&params, 0, sizeof(params));
2603
2604         otype = ntype = dev->ieee80211_ptr->iftype;
2605
2606         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2607                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2608                 if (otype != ntype)
2609                         change = true;
2610                 if (ntype > NL80211_IFTYPE_MAX)
2611                         return -EINVAL;
2612         }
2613
2614         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2615                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2616
2617                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2618                         return -EINVAL;
2619                 if (netif_running(dev))
2620                         return -EBUSY;
2621
2622                 wdev_lock(wdev);
2623                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2624                              IEEE80211_MAX_MESH_ID_LEN);
2625                 wdev->mesh_id_up_len =
2626                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2627                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2628                        wdev->mesh_id_up_len);
2629                 wdev_unlock(wdev);
2630         }
2631
2632         if (info->attrs[NL80211_ATTR_4ADDR]) {
2633                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2634                 change = true;
2635                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2636                 if (err)
2637                         return err;
2638         } else {
2639                 params.use_4addr = -1;
2640         }
2641
2642         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2643                 if (ntype != NL80211_IFTYPE_MONITOR)
2644                         return -EINVAL;
2645                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2646                                           &_flags);
2647                 if (err)
2648                         return err;
2649
2650                 flags = &_flags;
2651                 change = true;
2652         }
2653
2654         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2655             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2656                 return -EOPNOTSUPP;
2657
2658         if (change)
2659                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2660         else
2661                 err = 0;
2662
2663         if (!err && params.use_4addr != -1)
2664                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2665
2666         return err;
2667 }
2668
2669 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2670 {
2671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2672         struct vif_params params;
2673         struct wireless_dev *wdev;
2674         struct sk_buff *msg, *event;
2675         int err;
2676         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2677         u32 flags;
2678
2679         /* to avoid failing a new interface creation due to pending removal */
2680         cfg80211_destroy_ifaces(rdev);
2681
2682         memset(&params, 0, sizeof(params));
2683
2684         if (!info->attrs[NL80211_ATTR_IFNAME])
2685                 return -EINVAL;
2686
2687         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2688                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2689                 if (type > NL80211_IFTYPE_MAX)
2690                         return -EINVAL;
2691         }
2692
2693         if (!rdev->ops->add_virtual_intf ||
2694             !(rdev->wiphy.interface_modes & (1 << type)))
2695                 return -EOPNOTSUPP;
2696
2697         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2698              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2699             info->attrs[NL80211_ATTR_MAC]) {
2700                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2701                            ETH_ALEN);
2702                 if (!is_valid_ether_addr(params.macaddr))
2703                         return -EADDRNOTAVAIL;
2704         }
2705
2706         if (info->attrs[NL80211_ATTR_4ADDR]) {
2707                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2708                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2709                 if (err)
2710                         return err;
2711         }
2712
2713         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2714                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2715                                   &flags);
2716
2717         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2718             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2719                 return -EOPNOTSUPP;
2720
2721         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2722         if (!msg)
2723                 return -ENOMEM;
2724
2725         wdev = rdev_add_virtual_intf(rdev,
2726                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2727                                 NET_NAME_USER, type, err ? NULL : &flags,
2728                                 &params);
2729         if (WARN_ON(!wdev)) {
2730                 nlmsg_free(msg);
2731                 return -EPROTO;
2732         } else if (IS_ERR(wdev)) {
2733                 nlmsg_free(msg);
2734                 return PTR_ERR(wdev);
2735         }
2736
2737         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2738                 wdev->owner_nlportid = info->snd_portid;
2739
2740         switch (type) {
2741         case NL80211_IFTYPE_MESH_POINT:
2742                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2743                         break;
2744                 wdev_lock(wdev);
2745                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2746                              IEEE80211_MAX_MESH_ID_LEN);
2747                 wdev->mesh_id_up_len =
2748                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2749                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2750                        wdev->mesh_id_up_len);
2751                 wdev_unlock(wdev);
2752                 break;
2753         case NL80211_IFTYPE_P2P_DEVICE:
2754                 /*
2755                  * P2P Device doesn't have a netdev, so doesn't go
2756                  * through the netdev notifier and must be added here
2757                  */
2758                 mutex_init(&wdev->mtx);
2759                 INIT_LIST_HEAD(&wdev->event_list);
2760                 spin_lock_init(&wdev->event_lock);
2761                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2762                 spin_lock_init(&wdev->mgmt_registrations_lock);
2763
2764                 wdev->identifier = ++rdev->wdev_id;
2765                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2766                 rdev->devlist_generation++;
2767                 break;
2768         default:
2769                 break;
2770         }
2771
2772         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2773                                rdev, wdev, false) < 0) {
2774                 nlmsg_free(msg);
2775                 return -ENOBUFS;
2776         }
2777
2778         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2779         if (event) {
2780                 if (nl80211_send_iface(event, 0, 0, 0,
2781                                        rdev, wdev, false) < 0) {
2782                         nlmsg_free(event);
2783                         goto out;
2784                 }
2785
2786                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2787                                         event, 0, NL80211_MCGRP_CONFIG,
2788                                         GFP_KERNEL);
2789         }
2790
2791 out:
2792         return genlmsg_reply(msg, info);
2793 }
2794
2795 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2796 {
2797         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2798         struct wireless_dev *wdev = info->user_ptr[1];
2799         struct sk_buff *msg;
2800         int status;
2801
2802         if (!rdev->ops->del_virtual_intf)
2803                 return -EOPNOTSUPP;
2804
2805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2806         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2807                 nlmsg_free(msg);
2808                 msg = NULL;
2809         }
2810
2811         /*
2812          * If we remove a wireless device without a netdev then clear
2813          * user_ptr[1] so that nl80211_post_doit won't dereference it
2814          * to check if it needs to do dev_put(). Otherwise it crashes
2815          * since the wdev has been freed, unlike with a netdev where
2816          * we need the dev_put() for the netdev to really be freed.
2817          */
2818         if (!wdev->netdev)
2819                 info->user_ptr[1] = NULL;
2820
2821         status = rdev_del_virtual_intf(rdev, wdev);
2822         if (status >= 0 && msg)
2823                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2824                                         msg, 0, NL80211_MCGRP_CONFIG,
2825                                         GFP_KERNEL);
2826         else
2827                 nlmsg_free(msg);
2828
2829         return status;
2830 }
2831
2832 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2833 {
2834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2835         struct net_device *dev = info->user_ptr[1];
2836         u16 noack_map;
2837
2838         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2839                 return -EINVAL;
2840
2841         if (!rdev->ops->set_noack_map)
2842                 return -EOPNOTSUPP;
2843
2844         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2845
2846         return rdev_set_noack_map(rdev, dev, noack_map);
2847 }
2848
2849 struct get_key_cookie {
2850         struct sk_buff *msg;
2851         int error;
2852         int idx;
2853 };
2854
2855 static void get_key_callback(void *c, struct key_params *params)
2856 {
2857         struct nlattr *key;
2858         struct get_key_cookie *cookie = c;
2859
2860         if ((params->key &&
2861              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2862                      params->key_len, params->key)) ||
2863             (params->seq &&
2864              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2865                      params->seq_len, params->seq)) ||
2866             (params->cipher &&
2867              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2868                          params->cipher)))
2869                 goto nla_put_failure;
2870
2871         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2872         if (!key)
2873                 goto nla_put_failure;
2874
2875         if ((params->key &&
2876              nla_put(cookie->msg, NL80211_KEY_DATA,
2877                      params->key_len, params->key)) ||
2878             (params->seq &&
2879              nla_put(cookie->msg, NL80211_KEY_SEQ,
2880                      params->seq_len, params->seq)) ||
2881             (params->cipher &&
2882              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2883                          params->cipher)))
2884                 goto nla_put_failure;
2885
2886         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2887                 goto nla_put_failure;
2888
2889         nla_nest_end(cookie->msg, key);
2890
2891         return;
2892  nla_put_failure:
2893         cookie->error = 1;
2894 }
2895
2896 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2897 {
2898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2899         int err;
2900         struct net_device *dev = info->user_ptr[1];
2901         u8 key_idx = 0;
2902         const u8 *mac_addr = NULL;
2903         bool pairwise;
2904         struct get_key_cookie cookie = {
2905                 .error = 0,
2906         };
2907         void *hdr;
2908         struct sk_buff *msg;
2909
2910         if (info->attrs[NL80211_ATTR_KEY_IDX])
2911                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2912
2913         if (key_idx > 5)
2914                 return -EINVAL;
2915
2916         if (info->attrs[NL80211_ATTR_MAC])
2917                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2918
2919         pairwise = !!mac_addr;
2920         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2921                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2922                 if (kt >= NUM_NL80211_KEYTYPES)
2923                         return -EINVAL;
2924                 if (kt != NL80211_KEYTYPE_GROUP &&
2925                     kt != NL80211_KEYTYPE_PAIRWISE)
2926                         return -EINVAL;
2927                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2928         }
2929
2930         if (!rdev->ops->get_key)
2931                 return -EOPNOTSUPP;
2932
2933         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2934                 return -ENOENT;
2935
2936         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2937         if (!msg)
2938                 return -ENOMEM;
2939
2940         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2941                              NL80211_CMD_NEW_KEY);
2942         if (!hdr)
2943                 goto nla_put_failure;
2944
2945         cookie.msg = msg;
2946         cookie.idx = key_idx;
2947
2948         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2949             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2950                 goto nla_put_failure;
2951         if (mac_addr &&
2952             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2953                 goto nla_put_failure;
2954
2955         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2956                            get_key_callback);
2957
2958         if (err)
2959                 goto free_msg;
2960
2961         if (cookie.error)
2962                 goto nla_put_failure;
2963
2964         genlmsg_end(msg, hdr);
2965         return genlmsg_reply(msg, info);
2966
2967  nla_put_failure:
2968         err = -ENOBUFS;
2969  free_msg:
2970         nlmsg_free(msg);
2971         return err;
2972 }
2973
2974 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2975 {
2976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2977         struct key_parse key;
2978         int err;
2979         struct net_device *dev = info->user_ptr[1];
2980
2981         err = nl80211_parse_key(info, &key);
2982         if (err)
2983                 return err;
2984
2985         if (key.idx < 0)
2986                 return -EINVAL;
2987
2988         /* only support setting default key */
2989         if (!key.def && !key.defmgmt)
2990                 return -EINVAL;
2991
2992         wdev_lock(dev->ieee80211_ptr);
2993
2994         if (key.def) {
2995                 if (!rdev->ops->set_default_key) {
2996                         err = -EOPNOTSUPP;
2997                         goto out;
2998                 }
2999
3000                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3001                 if (err)
3002                         goto out;
3003
3004                 err = rdev_set_default_key(rdev, dev, key.idx,
3005                                                  key.def_uni, key.def_multi);
3006
3007                 if (err)
3008                         goto out;
3009
3010 #ifdef CONFIG_CFG80211_WEXT
3011                 dev->ieee80211_ptr->wext.default_key = key.idx;
3012 #endif
3013         } else {
3014                 if (key.def_uni || !key.def_multi) {
3015                         err = -EINVAL;
3016                         goto out;
3017                 }
3018
3019                 if (!rdev->ops->set_default_mgmt_key) {
3020                         err = -EOPNOTSUPP;
3021                         goto out;
3022                 }
3023
3024                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3025                 if (err)
3026                         goto out;
3027
3028                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3029                 if (err)
3030                         goto out;
3031
3032 #ifdef CONFIG_CFG80211_WEXT
3033                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3034 #endif
3035         }
3036
3037  out:
3038         wdev_unlock(dev->ieee80211_ptr);
3039
3040         return err;
3041 }
3042
3043 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3044 {
3045         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3046         int err;
3047         struct net_device *dev = info->user_ptr[1];
3048         struct key_parse key;
3049         const u8 *mac_addr = NULL;
3050
3051         err = nl80211_parse_key(info, &key);
3052         if (err)
3053                 return err;
3054
3055         if (!key.p.key)
3056                 return -EINVAL;
3057
3058         if (info->attrs[NL80211_ATTR_MAC])
3059                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3060
3061         if (key.type == -1) {
3062                 if (mac_addr)
3063                         key.type = NL80211_KEYTYPE_PAIRWISE;
3064                 else
3065                         key.type = NL80211_KEYTYPE_GROUP;
3066         }
3067
3068         /* for now */
3069         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3070             key.type != NL80211_KEYTYPE_GROUP)
3071                 return -EINVAL;
3072
3073         if (!rdev->ops->add_key)
3074                 return -EOPNOTSUPP;
3075
3076         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3077                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3078                                            mac_addr))
3079                 return -EINVAL;
3080
3081         wdev_lock(dev->ieee80211_ptr);
3082         err = nl80211_key_allowed(dev->ieee80211_ptr);
3083         if (!err)
3084                 err = rdev_add_key(rdev, dev, key.idx,
3085                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3086                                     mac_addr, &key.p);
3087         wdev_unlock(dev->ieee80211_ptr);
3088
3089         return err;
3090 }
3091
3092 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3093 {
3094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3095         int err;
3096         struct net_device *dev = info->user_ptr[1];
3097         u8 *mac_addr = NULL;
3098         struct key_parse key;
3099
3100         err = nl80211_parse_key(info, &key);
3101         if (err)
3102                 return err;
3103
3104         if (info->attrs[NL80211_ATTR_MAC])
3105                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3106
3107         if (key.type == -1) {
3108                 if (mac_addr)
3109                         key.type = NL80211_KEYTYPE_PAIRWISE;
3110                 else
3111                         key.type = NL80211_KEYTYPE_GROUP;
3112         }
3113
3114         /* for now */
3115         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3116             key.type != NL80211_KEYTYPE_GROUP)
3117                 return -EINVAL;
3118
3119         if (!rdev->ops->del_key)
3120                 return -EOPNOTSUPP;
3121
3122         wdev_lock(dev->ieee80211_ptr);
3123         err = nl80211_key_allowed(dev->ieee80211_ptr);
3124
3125         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3126             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3127                 err = -ENOENT;
3128
3129         if (!err)
3130                 err = rdev_del_key(rdev, dev, key.idx,
3131                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3132                                    mac_addr);
3133
3134 #ifdef CONFIG_CFG80211_WEXT
3135         if (!err) {
3136                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3137                         dev->ieee80211_ptr->wext.default_key = -1;
3138                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3139                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3140         }
3141 #endif
3142         wdev_unlock(dev->ieee80211_ptr);
3143
3144         return err;
3145 }
3146
3147 /* This function returns an error or the number of nested attributes */
3148 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3149 {
3150         struct nlattr *attr;
3151         int n_entries = 0, tmp;
3152
3153         nla_for_each_nested(attr, nl_attr, tmp) {
3154                 if (nla_len(attr) != ETH_ALEN)
3155                         return -EINVAL;
3156
3157                 n_entries++;
3158         }
3159
3160         return n_entries;
3161 }
3162
3163 /*
3164  * This function parses ACL information and allocates memory for ACL data.
3165  * On successful return, the calling function is responsible to free the
3166  * ACL buffer returned by this function.
3167  */
3168 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3169                                                 struct genl_info *info)
3170 {
3171         enum nl80211_acl_policy acl_policy;
3172         struct nlattr *attr;
3173         struct cfg80211_acl_data *acl;
3174         int i = 0, n_entries, tmp;
3175
3176         if (!wiphy->max_acl_mac_addrs)
3177                 return ERR_PTR(-EOPNOTSUPP);
3178
3179         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3180                 return ERR_PTR(-EINVAL);
3181
3182         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3183         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3184             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3185                 return ERR_PTR(-EINVAL);
3186
3187         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3188                 return ERR_PTR(-EINVAL);
3189
3190         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3191         if (n_entries < 0)
3192                 return ERR_PTR(n_entries);
3193
3194         if (n_entries > wiphy->max_acl_mac_addrs)
3195                 return ERR_PTR(-ENOTSUPP);
3196
3197         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3198                       GFP_KERNEL);
3199         if (!acl)
3200                 return ERR_PTR(-ENOMEM);
3201
3202         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3203                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3204                 i++;
3205         }
3206
3207         acl->n_acl_entries = n_entries;
3208         acl->acl_policy = acl_policy;
3209
3210         return acl;
3211 }
3212
3213 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3214 {
3215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3216         struct net_device *dev = info->user_ptr[1];
3217         struct cfg80211_acl_data *acl;
3218         int err;
3219
3220         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3221             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3222                 return -EOPNOTSUPP;
3223
3224         if (!dev->ieee80211_ptr->beacon_interval)
3225                 return -EINVAL;
3226
3227         acl = parse_acl_data(&rdev->wiphy, info);
3228         if (IS_ERR(acl))
3229                 return PTR_ERR(acl);
3230
3231         err = rdev_set_mac_acl(rdev, dev, acl);
3232
3233         kfree(acl);
3234
3235         return err;
3236 }
3237
3238 static int nl80211_parse_beacon(struct nlattr *attrs[],
3239                                 struct cfg80211_beacon_data *bcn)
3240 {
3241         bool haveinfo = false;
3242
3243         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3244             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3245             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3246             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3247                 return -EINVAL;
3248
3249         memset(bcn, 0, sizeof(*bcn));
3250
3251         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3252                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3253                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3254                 if (!bcn->head_len)
3255                         return -EINVAL;
3256                 haveinfo = true;
3257         }
3258
3259         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3260                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3261                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3262                 haveinfo = true;
3263         }
3264
3265         if (!haveinfo)
3266                 return -EINVAL;
3267
3268         if (attrs[NL80211_ATTR_IE]) {
3269                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3270                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3271         }
3272
3273         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3274                 bcn->proberesp_ies =
3275                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3276                 bcn->proberesp_ies_len =
3277                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3278         }
3279
3280         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3281                 bcn->assocresp_ies =
3282                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3283                 bcn->assocresp_ies_len =
3284                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3285         }
3286
3287         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3288                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3289                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3290         }
3291
3292         return 0;
3293 }
3294
3295 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3296                                    struct cfg80211_ap_settings *params)
3297 {
3298         struct wireless_dev *wdev;
3299         bool ret = false;
3300
3301         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3302                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3303                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3304                         continue;
3305
3306                 if (!wdev->preset_chandef.chan)
3307                         continue;
3308
3309                 params->chandef = wdev->preset_chandef;
3310                 ret = true;
3311                 break;
3312         }
3313
3314         return ret;
3315 }
3316
3317 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3318                                     enum nl80211_auth_type auth_type,
3319                                     enum nl80211_commands cmd)
3320 {
3321         if (auth_type > NL80211_AUTHTYPE_MAX)
3322                 return false;
3323
3324         switch (cmd) {
3325         case NL80211_CMD_AUTHENTICATE:
3326                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3327                     auth_type == NL80211_AUTHTYPE_SAE)
3328                         return false;
3329                 return true;
3330         case NL80211_CMD_CONNECT:
3331         case NL80211_CMD_START_AP:
3332                 /* SAE not supported yet */
3333                 if (auth_type == NL80211_AUTHTYPE_SAE)
3334                         return false;
3335                 return true;
3336         default:
3337                 return false;
3338         }
3339 }
3340
3341 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3342 {
3343         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3344         struct net_device *dev = info->user_ptr[1];
3345         struct wireless_dev *wdev = dev->ieee80211_ptr;
3346         struct cfg80211_ap_settings params;
3347         int err;
3348
3349         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3350             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3351                 return -EOPNOTSUPP;
3352
3353         if (!rdev->ops->start_ap)
3354                 return -EOPNOTSUPP;
3355
3356         if (wdev->beacon_interval)
3357                 return -EALREADY;
3358
3359         memset(&params, 0, sizeof(params));
3360
3361         /* these are required for START_AP */
3362         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3363             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3364             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3365                 return -EINVAL;
3366
3367         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3368         if (err)
3369                 return err;
3370
3371         params.beacon_interval =
3372                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3373         params.dtim_period =
3374                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3375
3376         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3377         if (err)
3378                 return err;
3379
3380         /*
3381          * In theory, some of these attributes should be required here
3382          * but since they were not used when the command was originally
3383          * added, keep them optional for old user space programs to let
3384          * them continue to work with drivers that do not need the
3385          * additional information -- drivers must check!
3386          */
3387         if (info->attrs[NL80211_ATTR_SSID]) {
3388                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3389                 params.ssid_len =
3390                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3391                 if (params.ssid_len == 0 ||
3392                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3393                         return -EINVAL;
3394         }
3395
3396         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3397                 params.hidden_ssid = nla_get_u32(
3398                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3399                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3400                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3401                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3402                         return -EINVAL;
3403         }
3404
3405         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3406
3407         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3408                 params.auth_type = nla_get_u32(
3409                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3410                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3411                                              NL80211_CMD_START_AP))
3412                         return -EINVAL;
3413         } else
3414                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3415
3416         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3417                                       NL80211_MAX_NR_CIPHER_SUITES);
3418         if (err)
3419                 return err;
3420
3421         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3422                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3423                         return -EOPNOTSUPP;
3424                 params.inactivity_timeout = nla_get_u16(
3425                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3426         }
3427
3428         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3429                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3430                         return -EINVAL;
3431                 params.p2p_ctwindow =
3432                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3433                 if (params.p2p_ctwindow > 127)
3434                         return -EINVAL;
3435                 if (params.p2p_ctwindow != 0 &&
3436                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3437                         return -EINVAL;
3438         }
3439
3440         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3441                 u8 tmp;
3442
3443                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3444                         return -EINVAL;
3445                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3446                 if (tmp > 1)
3447                         return -EINVAL;
3448                 params.p2p_opp_ps = tmp;
3449                 if (params.p2p_opp_ps != 0 &&
3450                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3451                         return -EINVAL;
3452         }
3453
3454         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3455                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3456                 if (err)
3457                         return err;
3458         } else if (wdev->preset_chandef.chan) {
3459                 params.chandef = wdev->preset_chandef;
3460         } else if (!nl80211_get_ap_channel(rdev, &params))
3461                 return -EINVAL;
3462
3463         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3464                                            wdev->iftype))
3465                 return -EINVAL;
3466
3467         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3468                 params.smps_mode =
3469                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3470                 switch (params.smps_mode) {
3471                 case NL80211_SMPS_OFF:
3472                         break;
3473                 case NL80211_SMPS_STATIC:
3474                         if (!(rdev->wiphy.features &
3475                               NL80211_FEATURE_STATIC_SMPS))
3476                                 return -EINVAL;
3477                         break;
3478                 case NL80211_SMPS_DYNAMIC:
3479                         if (!(rdev->wiphy.features &
3480                               NL80211_FEATURE_DYNAMIC_SMPS))
3481                                 return -EINVAL;
3482                         break;
3483                 default:
3484                         return -EINVAL;
3485                 }
3486         } else {
3487                 params.smps_mode = NL80211_SMPS_OFF;
3488         }
3489
3490         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3491                 params.acl = parse_acl_data(&rdev->wiphy, info);
3492                 if (IS_ERR(params.acl))
3493                         return PTR_ERR(params.acl);
3494         }
3495
3496         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3497         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3498                 return -EOPNOTSUPP;
3499
3500         wdev_lock(wdev);
3501         err = rdev_start_ap(rdev, dev, &params);
3502         if (!err) {
3503                 wdev->preset_chandef = params.chandef;
3504                 wdev->beacon_interval = params.beacon_interval;
3505                 wdev->chandef = params.chandef;
3506                 wdev->ssid_len = params.ssid_len;
3507                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3508         }
3509         wdev_unlock(wdev);
3510
3511         kfree(params.acl);
3512
3513         return err;
3514 }
3515
3516 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3517 {
3518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3519         struct net_device *dev = info->user_ptr[1];
3520         struct wireless_dev *wdev = dev->ieee80211_ptr;
3521         struct cfg80211_beacon_data params;
3522         int err;
3523
3524         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3525             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3526                 return -EOPNOTSUPP;
3527
3528         if (!rdev->ops->change_beacon)
3529                 return -EOPNOTSUPP;
3530
3531         if (!wdev->beacon_interval)
3532                 return -EINVAL;
3533
3534         err = nl80211_parse_beacon(info->attrs, &params);
3535         if (err)
3536                 return err;
3537
3538         wdev_lock(wdev);
3539         err = rdev_change_beacon(rdev, dev, &params);
3540         wdev_unlock(wdev);
3541
3542         return err;
3543 }
3544
3545 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3546 {
3547         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3548         struct net_device *dev = info->user_ptr[1];
3549
3550         return cfg80211_stop_ap(rdev, dev, false);
3551 }
3552
3553 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3554         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3555         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3556         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3557         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3558         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3559         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3560 };
3561
3562 static int parse_station_flags(struct genl_info *info,
3563                                enum nl80211_iftype iftype,
3564                                struct station_parameters *params)
3565 {
3566         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3567         struct nlattr *nla;
3568         int flag;
3569
3570         /*
3571          * Try parsing the new attribute first so userspace
3572          * can specify both for older kernels.
3573          */
3574         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3575         if (nla) {
3576                 struct nl80211_sta_flag_update *sta_flags;
3577
3578                 sta_flags = nla_data(nla);
3579                 params->sta_flags_mask = sta_flags->mask;
3580                 params->sta_flags_set = sta_flags->set;
3581                 params->sta_flags_set &= params->sta_flags_mask;
3582                 if ((params->sta_flags_mask |
3583                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3584                         return -EINVAL;
3585                 return 0;
3586         }
3587
3588         /* if present, parse the old attribute */
3589
3590         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3591         if (!nla)
3592                 return 0;
3593
3594         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3595                              nla, sta_flags_policy))
3596                 return -EINVAL;
3597
3598         /*
3599          * Only allow certain flags for interface types so that
3600          * other attributes are silently ignored. Remember that
3601          * this is backward compatibility code with old userspace
3602          * and shouldn't be hit in other cases anyway.
3603          */
3604         switch (iftype) {
3605         case NL80211_IFTYPE_AP:
3606         case NL80211_IFTYPE_AP_VLAN:
3607         case NL80211_IFTYPE_P2P_GO:
3608                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3609                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3610                                          BIT(NL80211_STA_FLAG_WME) |
3611                                          BIT(NL80211_STA_FLAG_MFP);
3612                 break;
3613         case NL80211_IFTYPE_P2P_CLIENT:
3614         case NL80211_IFTYPE_STATION:
3615                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3616                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3617                 break;
3618         case NL80211_IFTYPE_MESH_POINT:
3619                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3620                                          BIT(NL80211_STA_FLAG_MFP) |
3621                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3622         default:
3623                 return -EINVAL;
3624         }
3625
3626         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3627                 if (flags[flag]) {
3628                         params->sta_flags_set |= (1<<flag);
3629
3630                         /* no longer support new API additions in old API */
3631                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3632                                 return -EINVAL;
3633                 }
3634         }
3635
3636         return 0;
3637 }
3638
3639 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3640                                  int attr)
3641 {
3642         struct nlattr *rate;
3643         u32 bitrate;
3644         u16 bitrate_compat;
3645         enum nl80211_attrs rate_flg;
3646
3647         rate = nla_nest_start(msg, attr);
3648         if (!rate)
3649                 return false;
3650
3651         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3652         bitrate = cfg80211_calculate_bitrate(info);
3653         /* report 16-bit bitrate only if we can */
3654         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3655         if (bitrate > 0 &&
3656             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3657                 return false;
3658         if (bitrate_compat > 0 &&
3659             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3660                 return false;
3661
3662         switch (info->bw) {
3663         case RATE_INFO_BW_5:
3664                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3665                 break;
3666         case RATE_INFO_BW_10:
3667                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3668                 break;
3669         default:
3670                 WARN_ON(1);
3671                 /* fall through */
3672         case RATE_INFO_BW_20:
3673                 rate_flg = 0;
3674                 break;
3675         case RATE_INFO_BW_40:
3676                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3677                 break;
3678         case RATE_INFO_BW_80:
3679                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3680                 break;
3681         case RATE_INFO_BW_160:
3682                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3683                 break;
3684         }
3685
3686         if (rate_flg && nla_put_flag(msg, rate_flg))
3687                 return false;
3688
3689         if (info->flags & RATE_INFO_FLAGS_MCS) {
3690                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3691                         return false;
3692                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3693                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3694                         return false;
3695         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3696                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3697                         return false;
3698                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3699                         return false;
3700                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3701                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3702                         return false;
3703         }
3704
3705         nla_nest_end(msg, rate);
3706         return true;
3707 }
3708
3709 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3710                                int id)
3711 {
3712         void *attr;
3713         int i = 0;
3714
3715         if (!mask)
3716                 return true;
3717
3718         attr = nla_nest_start(msg, id);
3719         if (!attr)
3720                 return false;
3721
3722         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3723                 if (!(mask & BIT(i)))
3724                         continue;
3725
3726                 if (nla_put_u8(msg, i, signal[i]))
3727                         return false;
3728         }
3729
3730         nla_nest_end(msg, attr);
3731
3732         return true;
3733 }
3734
3735 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3736                                 u32 seq, int flags,
3737                                 struct cfg80211_registered_device *rdev,
3738                                 struct net_device *dev,
3739                                 const u8 *mac_addr, struct station_info *sinfo)
3740 {
3741         void *hdr;
3742         struct nlattr *sinfoattr, *bss_param;
3743
3744         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3745         if (!hdr)
3746                 return -1;
3747
3748         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3749             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3750             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3751                 goto nla_put_failure;
3752
3753         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3754         if (!sinfoattr)
3755                 goto nla_put_failure;
3756
3757 #define PUT_SINFO(attr, memb, type) do {                                \
3758         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3759         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3760             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3761                              sinfo->memb))                              \
3762                 goto nla_put_failure;                                   \
3763         } while (0)
3764 #define PUT_SINFO_U64(attr, memb) do {                                  \
3765         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3766             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3767                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3768                 goto nla_put_failure;                                   \
3769         } while (0)
3770
3771         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3772         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3773
3774         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3775                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3776             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3777                         (u32)sinfo->rx_bytes))
3778                 goto nla_put_failure;
3779
3780         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3781                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3782             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3783                         (u32)sinfo->tx_bytes))
3784                 goto nla_put_failure;
3785
3786         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3787         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3788         PUT_SINFO(LLID, llid, u16);
3789         PUT_SINFO(PLID, plid, u16);
3790         PUT_SINFO(PLINK_STATE, plink_state, u8);
3791         PUT_SINFO_U64(RX_DURATION, rx_duration);
3792
3793         switch (rdev->wiphy.signal_type) {
3794         case CFG80211_SIGNAL_TYPE_MBM:
3795                 PUT_SINFO(SIGNAL, signal, u8);
3796                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3797                 break;
3798         default:
3799                 break;
3800         }
3801         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3802                 if (!nl80211_put_signal(msg, sinfo->chains,
3803                                         sinfo->chain_signal,
3804                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3805                         goto nla_put_failure;
3806         }
3807         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3808                 if (!nl80211_put_signal(msg, sinfo->chains,
3809                                         sinfo->chain_signal_avg,
3810                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3811                         goto nla_put_failure;
3812         }
3813         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3814                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3815                                           NL80211_STA_INFO_TX_BITRATE))
3816                         goto nla_put_failure;
3817         }
3818         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3819                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3820                                           NL80211_STA_INFO_RX_BITRATE))
3821                         goto nla_put_failure;
3822         }
3823
3824         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3825         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3826         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3827         PUT_SINFO(TX_FAILED, tx_failed, u32);
3828         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3829         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3830         PUT_SINFO(LOCAL_PM, local_pm, u32);
3831         PUT_SINFO(PEER_PM, peer_pm, u32);
3832         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3833
3834         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3835                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3836                 if (!bss_param)
3837                         goto nla_put_failure;
3838
3839                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3840                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3841                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3842                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3843                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3844                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3845                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3846                                sinfo->bss_param.dtim_period) ||
3847                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3848                                 sinfo->bss_param.beacon_interval))
3849                         goto nla_put_failure;
3850
3851                 nla_nest_end(msg, bss_param);
3852         }
3853         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3854             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3855                     sizeof(struct nl80211_sta_flag_update),
3856                     &sinfo->sta_flags))
3857                 goto nla_put_failure;
3858
3859         PUT_SINFO_U64(T_OFFSET, t_offset);
3860         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3861         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3862         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3863
3864 #undef PUT_SINFO
3865 #undef PUT_SINFO_U64
3866
3867         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3868                 struct nlattr *tidsattr;
3869                 int tid;
3870
3871                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3872                 if (!tidsattr)
3873                         goto nla_put_failure;
3874
3875                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3876                         struct cfg80211_tid_stats *tidstats;
3877                         struct nlattr *tidattr;
3878
3879                         tidstats = &sinfo->pertid[tid];
3880
3881                         if (!tidstats->filled)
3882                                 continue;
3883
3884                         tidattr = nla_nest_start(msg, tid + 1);
3885                         if (!tidattr)
3886                                 goto nla_put_failure;
3887
3888 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3889         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3890             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3891                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3892                 goto nla_put_failure;                                   \
3893         } while (0)
3894
3895                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3896                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3897                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3898                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3899
3900 #undef PUT_TIDVAL_U64
3901                         nla_nest_end(msg, tidattr);
3902                 }
3903
3904                 nla_nest_end(msg, tidsattr);
3905         }
3906
3907         nla_nest_end(msg, sinfoattr);
3908
3909         if (sinfo->assoc_req_ies_len &&
3910             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3911                     sinfo->assoc_req_ies))
3912                 goto nla_put_failure;
3913
3914         genlmsg_end(msg, hdr);
3915         return 0;
3916
3917  nla_put_failure:
3918         genlmsg_cancel(msg, hdr);
3919         return -EMSGSIZE;
3920 }
3921
3922 static int nl80211_dump_station(struct sk_buff *skb,
3923                                 struct netlink_callback *cb)
3924 {
3925         struct station_info sinfo;
3926         struct cfg80211_registered_device *rdev;
3927         struct wireless_dev *wdev;
3928         u8 mac_addr[ETH_ALEN];
3929         int sta_idx = cb->args[2];
3930         int err;
3931
3932         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3933         if (err)
3934                 return err;
3935
3936         if (!wdev->netdev) {
3937                 err = -EINVAL;
3938                 goto out_err;
3939         }
3940
3941         if (!rdev->ops->dump_station) {
3942                 err = -EOPNOTSUPP;
3943                 goto out_err;
3944         }
3945
3946         while (1) {
3947                 memset(&sinfo, 0, sizeof(sinfo));
3948                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3949                                         mac_addr, &sinfo);
3950                 if (err == -ENOENT)
3951                         break;
3952                 if (err)
3953                         goto out_err;
3954
3955                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3956                                 NETLINK_CB(cb->skb).portid,
3957                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3958                                 rdev, wdev->netdev, mac_addr,
3959                                 &sinfo) < 0)
3960                         goto out;
3961
3962                 sta_idx++;
3963         }
3964
3965
3966  out:
3967         cb->args[2] = sta_idx;
3968         err = skb->len;
3969  out_err:
3970         nl80211_finish_wdev_dump(rdev);
3971
3972         return err;
3973 }
3974
3975 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3976 {
3977         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3978         struct net_device *dev = info->user_ptr[1];
3979         struct station_info sinfo;
3980         struct sk_buff *msg;
3981         u8 *mac_addr = NULL;
3982         int err;
3983
3984         memset(&sinfo, 0, sizeof(sinfo));
3985
3986         if (!info->attrs[NL80211_ATTR_MAC])
3987                 return -EINVAL;
3988
3989         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3990
3991         if (!rdev->ops->get_station)
3992                 return -EOPNOTSUPP;
3993
3994         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3995         if (err)
3996                 return err;
3997
3998         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3999         if (!msg)
4000                 return -ENOMEM;
4001
4002         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4003                                  info->snd_portid, info->snd_seq, 0,
4004                                  rdev, dev, mac_addr, &sinfo) < 0) {
4005                 nlmsg_free(msg);
4006                 return -ENOBUFS;
4007         }
4008
4009         return genlmsg_reply(msg, info);
4010 }
4011
4012 int cfg80211_check_station_change(struct wiphy *wiphy,
4013                                   struct station_parameters *params,
4014                                   enum cfg80211_station_type statype)
4015 {
4016         if (params->listen_interval != -1 &&
4017             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4018                 return -EINVAL;
4019
4020         if (params->support_p2p_ps != -1 &&
4021             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4022                 return -EINVAL;
4023
4024         if (params->aid &&
4025             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4026             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4027                 return -EINVAL;
4028
4029         /* When you run into this, adjust the code below for the new flag */
4030         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4031
4032         switch (statype) {
4033         case CFG80211_STA_MESH_PEER_KERNEL:
4034         case CFG80211_STA_MESH_PEER_USER:
4035                 /*
4036                  * No ignoring the TDLS flag here -- the userspace mesh
4037                  * code doesn't have the bug of including TDLS in the
4038                  * mask everywhere.
4039                  */
4040                 if (params->sta_flags_mask &
4041                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4042                                   BIT(NL80211_STA_FLAG_MFP) |
4043                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4044                         return -EINVAL;
4045                 break;
4046         case CFG80211_STA_TDLS_PEER_SETUP:
4047         case CFG80211_STA_TDLS_PEER_ACTIVE:
4048                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4049                         return -EINVAL;
4050                 /* ignore since it can't change */
4051                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4052                 break;
4053         default:
4054                 /* disallow mesh-specific things */
4055                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4056                         return -EINVAL;
4057                 if (params->local_pm)
4058                         return -EINVAL;
4059                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4060                         return -EINVAL;
4061         }
4062
4063         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4064             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4065                 /* TDLS can't be set, ... */
4066                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4067                         return -EINVAL;
4068                 /*
4069                  * ... but don't bother the driver with it. This works around
4070                  * a hostapd/wpa_supplicant issue -- it always includes the
4071                  * TLDS_PEER flag in the mask even for AP mode.
4072                  */
4073                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4074         }
4075
4076         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4077             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4078                 /* reject other things that can't change */
4079                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4080                         return -EINVAL;
4081                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4082                         return -EINVAL;
4083                 if (params->supported_rates)
4084                         return -EINVAL;
4085                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4086                         return -EINVAL;
4087         }
4088
4089         if (statype != CFG80211_STA_AP_CLIENT &&
4090             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4091                 if (params->vlan)
4092                         return -EINVAL;
4093         }
4094
4095         switch (statype) {
4096         case CFG80211_STA_AP_MLME_CLIENT:
4097                 /* Use this only for authorizing/unauthorizing a station */
4098                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4099                         return -EOPNOTSUPP;
4100                 break;
4101         case CFG80211_STA_AP_CLIENT:
4102         case CFG80211_STA_AP_CLIENT_UNASSOC:
4103                 /* accept only the listed bits */
4104                 if (params->sta_flags_mask &
4105                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4106                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4107                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4108                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4109                                   BIT(NL80211_STA_FLAG_WME) |
4110                                   BIT(NL80211_STA_FLAG_MFP)))
4111                         return -EINVAL;
4112
4113                 /* but authenticated/associated only if driver handles it */
4114                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4115                     params->sta_flags_mask &
4116                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4117                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4118                         return -EINVAL;
4119                 break;
4120         case CFG80211_STA_IBSS:
4121         case CFG80211_STA_AP_STA:
4122                 /* reject any changes other than AUTHORIZED */
4123                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4124                         return -EINVAL;
4125                 break;
4126         case CFG80211_STA_TDLS_PEER_SETUP:
4127                 /* reject any changes other than AUTHORIZED or WME */
4128                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4129                                                BIT(NL80211_STA_FLAG_WME)))
4130                         return -EINVAL;
4131                 /* force (at least) rates when authorizing */
4132                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4133                     !params->supported_rates)
4134                         return -EINVAL;
4135                 break;
4136         case CFG80211_STA_TDLS_PEER_ACTIVE:
4137                 /* reject any changes */
4138                 return -EINVAL;
4139         case CFG80211_STA_MESH_PEER_KERNEL:
4140                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4141                         return -EINVAL;
4142                 break;
4143         case CFG80211_STA_MESH_PEER_USER:
4144                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4145                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4146                         return -EINVAL;
4147                 break;
4148         }
4149
4150         return 0;
4151 }
4152 EXPORT_SYMBOL(cfg80211_check_station_change);
4153
4154 /*
4155  * Get vlan interface making sure it is running and on the right wiphy.
4156  */
4157 static struct net_device *get_vlan(struct genl_info *info,
4158                                    struct cfg80211_registered_device *rdev)
4159 {
4160         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4161         struct net_device *v;
4162         int ret;
4163
4164         if (!vlanattr)
4165                 return NULL;
4166
4167         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4168         if (!v)
4169                 return ERR_PTR(-ENODEV);
4170
4171         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4172                 ret = -EINVAL;
4173                 goto error;
4174         }
4175
4176         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4177             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4178             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4179                 ret = -EINVAL;
4180                 goto error;
4181         }
4182
4183         if (!netif_running(v)) {
4184                 ret = -ENETDOWN;
4185                 goto error;
4186         }
4187
4188         return v;
4189  error:
4190         dev_put(v);
4191         return ERR_PTR(ret);
4192 }
4193
4194 static const struct nla_policy
4195 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4196         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4197         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4198 };
4199
4200 static int nl80211_parse_sta_wme(struct genl_info *info,
4201                                  struct station_parameters *params)
4202 {
4203         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4204         struct nlattr *nla;
4205         int err;
4206
4207         /* parse WME attributes if present */
4208         if (!info->attrs[NL80211_ATTR_STA_WME])
4209                 return 0;
4210
4211         nla = info->attrs[NL80211_ATTR_STA_WME];
4212         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4213                                nl80211_sta_wme_policy);
4214         if (err)
4215                 return err;
4216
4217         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4218                 params->uapsd_queues = nla_get_u8(
4219                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4220         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4221                 return -EINVAL;
4222
4223         if (tb[NL80211_STA_WME_MAX_SP])
4224                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4225
4226         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4227                 return -EINVAL;
4228
4229         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4230
4231         return 0;
4232 }
4233
4234 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4235                                       struct station_parameters *params)
4236 {
4237         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4238                 params->supported_channels =
4239                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4240                 params->supported_channels_len =
4241                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4242                 /*
4243                  * Need to include at least one (first channel, number of
4244                  * channels) tuple for each subband, and must have proper
4245                  * tuples for the rest of the data as well.
4246                  */
4247                 if (params->supported_channels_len < 2)
4248                         return -EINVAL;
4249                 if (params->supported_channels_len % 2)
4250                         return -EINVAL;
4251         }
4252
4253         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4254                 params->supported_oper_classes =
4255                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4256                 params->supported_oper_classes_len =
4257                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4258                 /*
4259                  * The value of the Length field of the Supported Operating
4260                  * Classes element is between 2 and 253.
4261                  */
4262                 if (params->supported_oper_classes_len < 2 ||
4263                     params->supported_oper_classes_len > 253)
4264                         return -EINVAL;
4265         }
4266         return 0;
4267 }
4268
4269 static int nl80211_set_station_tdls(struct genl_info *info,
4270                                     struct station_parameters *params)
4271 {
4272         int err;
4273         /* Dummy STA entry gets updated once the peer capabilities are known */
4274         if (info->attrs[NL80211_ATTR_PEER_AID])
4275                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4276         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4277                 params->ht_capa =
4278                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4279         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4280                 params->vht_capa =
4281                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4282
4283         err = nl80211_parse_sta_channel_info(info, params);
4284         if (err)
4285                 return err;
4286
4287         return nl80211_parse_sta_wme(info, params);
4288 }
4289
4290 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4291 {
4292         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4293         struct net_device *dev = info->user_ptr[1];
4294         struct station_parameters params;
4295         u8 *mac_addr;
4296         int err;
4297
4298         memset(&params, 0, sizeof(params));
4299
4300         if (!rdev->ops->change_station)
4301                 return -EOPNOTSUPP;
4302
4303         /*
4304          * AID and listen_interval properties can be set only for unassociated
4305          * station. Include these parameters here and will check them in
4306          * cfg80211_check_station_change().
4307          */
4308         if (info->attrs[NL80211_ATTR_STA_AID])
4309                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4310
4311         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4312                 params.listen_interval =
4313                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4314         else
4315                 params.listen_interval = -1;
4316
4317         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4318                 u8 tmp;
4319
4320                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4321                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4322                         return -EINVAL;
4323
4324                 params.support_p2p_ps = tmp;
4325         } else {
4326                 params.support_p2p_ps = -1;
4327         }
4328
4329         if (!info->attrs[NL80211_ATTR_MAC])
4330                 return -EINVAL;
4331
4332         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4333
4334         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4335                 params.supported_rates =
4336                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4337                 params.supported_rates_len =
4338                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4339         }
4340
4341         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4342                 params.capability =
4343                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4344                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4345         }
4346
4347         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4348                 params.ext_capab =
4349                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4350                 params.ext_capab_len =
4351                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4352         }
4353
4354         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4355                 return -EINVAL;
4356
4357         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4358                 params.plink_action =
4359                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4360                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4361                         return -EINVAL;
4362         }
4363
4364         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4365                 params.plink_state =
4366                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4367                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4368                         return -EINVAL;
4369                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4370         }
4371
4372         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4373                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4374                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4375
4376                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4377                     pm > NL80211_MESH_POWER_MAX)
4378                         return -EINVAL;
4379
4380                 params.local_pm = pm;
4381         }
4382
4383         /* Include parameters for TDLS peer (will check later) */
4384         err = nl80211_set_station_tdls(info, &params);
4385         if (err)
4386                 return err;
4387
4388         params.vlan = get_vlan(info, rdev);
4389         if (IS_ERR(params.vlan))
4390                 return PTR_ERR(params.vlan);
4391
4392         switch (dev->ieee80211_ptr->iftype) {
4393         case NL80211_IFTYPE_AP:
4394         case NL80211_IFTYPE_AP_VLAN:
4395         case NL80211_IFTYPE_P2P_GO:
4396         case NL80211_IFTYPE_P2P_CLIENT:
4397         case NL80211_IFTYPE_STATION:
4398         case NL80211_IFTYPE_ADHOC:
4399         case NL80211_IFTYPE_MESH_POINT:
4400                 break;
4401         default:
4402                 err = -EOPNOTSUPP;
4403                 goto out_put_vlan;
4404         }
4405
4406         /* driver will call cfg80211_check_station_change() */
4407         err = rdev_change_station(rdev, dev, mac_addr, &params);
4408
4409  out_put_vlan:
4410         if (params.vlan)
4411                 dev_put(params.vlan);
4412
4413         return err;
4414 }
4415
4416 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4417 {
4418         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4419         int err;
4420         struct net_device *dev = info->user_ptr[1];
4421         struct station_parameters params;
4422         u8 *mac_addr = NULL;
4423         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4424                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4425
4426         memset(&params, 0, sizeof(params));
4427
4428         if (!rdev->ops->add_station)
4429                 return -EOPNOTSUPP;
4430
4431         if (!info->attrs[NL80211_ATTR_MAC])
4432                 return -EINVAL;
4433
4434         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4435                 return -EINVAL;
4436
4437         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4438                 return -EINVAL;
4439
4440         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4441             !info->attrs[NL80211_ATTR_PEER_AID])
4442                 return -EINVAL;
4443
4444         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4445         params.supported_rates =
4446                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4447         params.supported_rates_len =
4448                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4449         params.listen_interval =
4450                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4451
4452         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4453                 u8 tmp;
4454
4455                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4456                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4457                         return -EINVAL;
4458
4459                 params.support_p2p_ps = tmp;
4460         } else {
4461                 /*
4462                  * if not specified, assume it's supported for P2P GO interface,
4463                  * and is NOT supported for AP interface
4464                  */
4465                 params.support_p2p_ps =
4466                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4467         }
4468
4469         if (info->attrs[NL80211_ATTR_PEER_AID])
4470                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4471         else
4472                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4473         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4474                 return -EINVAL;
4475
4476         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4477                 params.capability =
4478                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4479                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4480         }
4481
4482         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4483                 params.ext_capab =
4484                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4485                 params.ext_capab_len =
4486                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4487         }
4488
4489         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4490                 params.ht_capa =
4491                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4492
4493         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4494                 params.vht_capa =
4495                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4496
4497         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4498                 params.opmode_notif_used = true;
4499                 params.opmode_notif =
4500                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4501         }
4502
4503         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4504                 params.plink_action =
4505                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4506                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4507                         return -EINVAL;
4508         }
4509
4510         err = nl80211_parse_sta_channel_info(info, &params);
4511         if (err)
4512                 return err;
4513
4514         err = nl80211_parse_sta_wme(info, &params);
4515         if (err)
4516                 return err;
4517
4518         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4519                 return -EINVAL;
4520
4521         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4522          * as userspace might just pass through the capabilities from the IEs
4523          * directly, rather than enforcing this restriction and returning an
4524          * error in this case.
4525          */
4526         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4527                 params.ht_capa = NULL;
4528                 params.vht_capa = NULL;
4529         }
4530
4531         /* When you run into this, adjust the code below for the new flag */
4532         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4533
4534         switch (dev->ieee80211_ptr->iftype) {
4535         case NL80211_IFTYPE_AP:
4536         case NL80211_IFTYPE_AP_VLAN:
4537         case NL80211_IFTYPE_P2P_GO:
4538                 /* ignore WME attributes if iface/sta is not capable */
4539                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4540                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4541                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4542
4543                 /* TDLS peers cannot be added */
4544                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4545                     info->attrs[NL80211_ATTR_PEER_AID])
4546                         return -EINVAL;
4547                 /* but don't bother the driver with it */
4548                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4549
4550                 /* allow authenticated/associated only if driver handles it */
4551                 if (!(rdev->wiphy.features &
4552                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4553                     params.sta_flags_mask & auth_assoc)
4554                         return -EINVAL;
4555
4556                 /* Older userspace, or userspace wanting to be compatible with
4557                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4558                  * and assoc flags in the mask, but assumes the station will be
4559                  * added as associated anyway since this was the required driver
4560                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4561                  * introduced.
4562                  * In order to not bother drivers with this quirk in the API
4563                  * set the flags in both the mask and set for new stations in
4564                  * this case.
4565                  */
4566                 if (!(params.sta_flags_mask & auth_assoc)) {
4567                         params.sta_flags_mask |= auth_assoc;
4568                         params.sta_flags_set |= auth_assoc;
4569                 }
4570
4571                 /* must be last in here for error handling */
4572                 params.vlan = get_vlan(info, rdev);
4573                 if (IS_ERR(params.vlan))
4574                         return PTR_ERR(params.vlan);
4575                 break;
4576         case NL80211_IFTYPE_MESH_POINT:
4577                 /* ignore uAPSD data */
4578                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4579
4580                 /* associated is disallowed */
4581                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4582                         return -EINVAL;
4583                 /* TDLS peers cannot be added */
4584                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4585                     info->attrs[NL80211_ATTR_PEER_AID])
4586                         return -EINVAL;
4587                 break;
4588         case NL80211_IFTYPE_STATION:
4589         case NL80211_IFTYPE_P2P_CLIENT:
4590                 /* ignore uAPSD data */
4591                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4592
4593                 /* these are disallowed */
4594                 if (params.sta_flags_mask &
4595                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4596                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4597                         return -EINVAL;
4598                 /* Only TDLS peers can be added */
4599                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4600                         return -EINVAL;
4601                 /* Can only add if TDLS ... */
4602                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4603                         return -EOPNOTSUPP;
4604                 /* ... with external setup is supported */
4605                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4606                         return -EOPNOTSUPP;
4607                 /*
4608                  * Older wpa_supplicant versions always mark the TDLS peer
4609                  * as authorized, but it shouldn't yet be.
4610                  */
4611                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4612                 break;
4613         default:
4614                 return -EOPNOTSUPP;
4615         }
4616
4617         /* be aware of params.vlan when changing code here */
4618
4619         err = rdev_add_station(rdev, dev, mac_addr, &params);
4620
4621         if (params.vlan)
4622                 dev_put(params.vlan);
4623         return err;
4624 }
4625
4626 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4627 {
4628         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4629         struct net_device *dev = info->user_ptr[1];
4630         struct station_del_parameters params;
4631
4632         memset(&params, 0, sizeof(params));
4633
4634         if (info->attrs[NL80211_ATTR_MAC])
4635                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4636
4637         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4638             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4639             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4640             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4641                 return -EINVAL;
4642
4643         if (!rdev->ops->del_station)
4644                 return -EOPNOTSUPP;
4645
4646         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4647                 params.subtype =
4648                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4649                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4650                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4651                         return -EINVAL;
4652         } else {
4653                 /* Default to Deauthentication frame */
4654                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4655         }
4656
4657         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4658                 params.reason_code =
4659                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4660                 if (params.reason_code == 0)
4661                         return -EINVAL; /* 0 is reserved */
4662         } else {
4663                 /* Default to reason code 2 */
4664                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4665         }
4666
4667         return rdev_del_station(rdev, dev, &params);
4668 }
4669
4670 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4671                                 int flags, struct net_device *dev,
4672                                 u8 *dst, u8 *next_hop,
4673                                 struct mpath_info *pinfo)
4674 {
4675         void *hdr;
4676         struct nlattr *pinfoattr;
4677
4678         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4679         if (!hdr)
4680                 return -1;
4681
4682         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4683             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4684             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4685             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4686                 goto nla_put_failure;
4687
4688         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4689         if (!pinfoattr)
4690                 goto nla_put_failure;
4691         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4692             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4693                         pinfo->frame_qlen))
4694                 goto nla_put_failure;
4695         if (((pinfo->filled & MPATH_INFO_SN) &&
4696              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4697             ((pinfo->filled & MPATH_INFO_METRIC) &&
4698              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4699                          pinfo->metric)) ||
4700             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4701              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4702                          pinfo->exptime)) ||
4703             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4704              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4705                         pinfo->flags)) ||
4706             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4707              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4708                          pinfo->discovery_timeout)) ||
4709             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4710              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4711                         pinfo->discovery_retries)))
4712                 goto nla_put_failure;
4713
4714         nla_nest_end(msg, pinfoattr);
4715
4716         genlmsg_end(msg, hdr);
4717         return 0;
4718
4719  nla_put_failure:
4720         genlmsg_cancel(msg, hdr);
4721         return -EMSGSIZE;
4722 }
4723
4724 static int nl80211_dump_mpath(struct sk_buff *skb,
4725                               struct netlink_callback *cb)
4726 {
4727         struct mpath_info pinfo;
4728         struct cfg80211_registered_device *rdev;
4729         struct wireless_dev *wdev;
4730         u8 dst[ETH_ALEN];
4731         u8 next_hop[ETH_ALEN];
4732         int path_idx = cb->args[2];
4733         int err;
4734
4735         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4736         if (err)
4737                 return err;
4738
4739         if (!rdev->ops->dump_mpath) {
4740                 err = -EOPNOTSUPP;
4741                 goto out_err;
4742         }
4743
4744         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4745                 err = -EOPNOTSUPP;
4746                 goto out_err;
4747         }
4748
4749         while (1) {
4750                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4751                                       next_hop, &pinfo);
4752                 if (err == -ENOENT)
4753                         break;
4754                 if (err)
4755                         goto out_err;
4756
4757                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4758                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4759                                        wdev->netdev, dst, next_hop,
4760                                        &pinfo) < 0)
4761                         goto out;
4762
4763                 path_idx++;
4764         }
4765
4766
4767  out:
4768         cb->args[2] = path_idx;
4769         err = skb->len;
4770  out_err:
4771         nl80211_finish_wdev_dump(rdev);
4772         return err;
4773 }
4774
4775 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4776 {
4777         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4778         int err;
4779         struct net_device *dev = info->user_ptr[1];
4780         struct mpath_info pinfo;
4781         struct sk_buff *msg;
4782         u8 *dst = NULL;
4783         u8 next_hop[ETH_ALEN];
4784
4785         memset(&pinfo, 0, sizeof(pinfo));
4786
4787         if (!info->attrs[NL80211_ATTR_MAC])
4788                 return -EINVAL;
4789
4790         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4791
4792         if (!rdev->ops->get_mpath)
4793                 return -EOPNOTSUPP;
4794
4795         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4796                 return -EOPNOTSUPP;
4797
4798         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4799         if (err)
4800                 return err;
4801
4802         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4803         if (!msg)
4804                 return -ENOMEM;
4805
4806         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4807                                  dev, dst, next_hop, &pinfo) < 0) {
4808                 nlmsg_free(msg);
4809                 return -ENOBUFS;
4810         }
4811
4812         return genlmsg_reply(msg, info);
4813 }
4814
4815 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4816 {
4817         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4818         struct net_device *dev = info->user_ptr[1];
4819         u8 *dst = NULL;
4820         u8 *next_hop = NULL;
4821
4822         if (!info->attrs[NL80211_ATTR_MAC])
4823                 return -EINVAL;
4824
4825         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4826                 return -EINVAL;
4827
4828         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4829         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4830
4831         if (!rdev->ops->change_mpath)
4832                 return -EOPNOTSUPP;
4833
4834         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4835                 return -EOPNOTSUPP;
4836
4837         return rdev_change_mpath(rdev, dev, dst, next_hop);
4838 }
4839
4840 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4841 {
4842         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4843         struct net_device *dev = info->user_ptr[1];
4844         u8 *dst = NULL;
4845         u8 *next_hop = NULL;
4846
4847         if (!info->attrs[NL80211_ATTR_MAC])
4848                 return -EINVAL;
4849
4850         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4851                 return -EINVAL;
4852
4853         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4854         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4855
4856         if (!rdev->ops->add_mpath)
4857                 return -EOPNOTSUPP;
4858
4859         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4860                 return -EOPNOTSUPP;
4861
4862         return rdev_add_mpath(rdev, dev, dst, next_hop);
4863 }
4864
4865 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4866 {
4867         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4868         struct net_device *dev = info->user_ptr[1];
4869         u8 *dst = NULL;
4870
4871         if (info->attrs[NL80211_ATTR_MAC])
4872                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4873
4874         if (!rdev->ops->del_mpath)
4875                 return -EOPNOTSUPP;
4876
4877         return rdev_del_mpath(rdev, dev, dst);
4878 }
4879
4880 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4881 {
4882         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4883         int err;
4884         struct net_device *dev = info->user_ptr[1];
4885         struct mpath_info pinfo;
4886         struct sk_buff *msg;
4887         u8 *dst = NULL;
4888         u8 mpp[ETH_ALEN];
4889
4890         memset(&pinfo, 0, sizeof(pinfo));
4891
4892         if (!info->attrs[NL80211_ATTR_MAC])
4893                 return -EINVAL;
4894
4895         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4896
4897         if (!rdev->ops->get_mpp)
4898                 return -EOPNOTSUPP;
4899
4900         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4901                 return -EOPNOTSUPP;
4902
4903         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4904         if (err)
4905                 return err;
4906
4907         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4908         if (!msg)
4909                 return -ENOMEM;
4910
4911         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4912                                dev, dst, mpp, &pinfo) < 0) {
4913                 nlmsg_free(msg);
4914                 return -ENOBUFS;
4915         }
4916
4917         return genlmsg_reply(msg, info);
4918 }
4919
4920 static int nl80211_dump_mpp(struct sk_buff *skb,
4921                             struct netlink_callback *cb)
4922 {
4923         struct mpath_info pinfo;
4924         struct cfg80211_registered_device *rdev;
4925         struct wireless_dev *wdev;
4926         u8 dst[ETH_ALEN];
4927         u8 mpp[ETH_ALEN];
4928         int path_idx = cb->args[2];
4929         int err;
4930
4931         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4932         if (err)
4933                 return err;
4934
4935         if (!rdev->ops->dump_mpp) {
4936                 err = -EOPNOTSUPP;
4937                 goto out_err;
4938         }
4939
4940         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4941                 err = -EOPNOTSUPP;
4942                 goto out_err;
4943         }
4944
4945         while (1) {
4946                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4947                                     mpp, &pinfo);
4948                 if (err == -ENOENT)
4949                         break;
4950                 if (err)
4951                         goto out_err;
4952
4953                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4954                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4955                                        wdev->netdev, dst, mpp,
4956                                        &pinfo) < 0)
4957                         goto out;
4958
4959                 path_idx++;
4960         }
4961
4962  out:
4963         cb->args[2] = path_idx;
4964         err = skb->len;
4965  out_err:
4966         nl80211_finish_wdev_dump(rdev);
4967         return err;
4968 }
4969
4970 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4971 {
4972         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4973         struct net_device *dev = info->user_ptr[1];
4974         struct wireless_dev *wdev = dev->ieee80211_ptr;
4975         struct bss_parameters params;
4976         int err;
4977
4978         memset(&params, 0, sizeof(params));
4979         /* default to not changing parameters */
4980         params.use_cts_prot = -1;
4981         params.use_short_preamble = -1;
4982         params.use_short_slot_time = -1;
4983         params.ap_isolate = -1;
4984         params.ht_opmode = -1;
4985         params.p2p_ctwindow = -1;
4986         params.p2p_opp_ps = -1;
4987
4988         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4989                 params.use_cts_prot =
4990                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4991         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4992                 params.use_short_preamble =
4993                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4994         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4995                 params.use_short_slot_time =
4996                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4997         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4998                 params.basic_rates =
4999                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5000                 params.basic_rates_len =
5001                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5002         }
5003         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5004                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5005         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5006                 params.ht_opmode =
5007                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5008
5009         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5010                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5011                         return -EINVAL;
5012                 params.p2p_ctwindow =
5013                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5014                 if (params.p2p_ctwindow < 0)
5015                         return -EINVAL;
5016                 if (params.p2p_ctwindow != 0 &&
5017                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5018                         return -EINVAL;
5019         }
5020
5021         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5022                 u8 tmp;
5023
5024                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5025                         return -EINVAL;
5026                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5027                 if (tmp > 1)
5028                         return -EINVAL;
5029                 params.p2p_opp_ps = tmp;
5030                 if (params.p2p_opp_ps &&
5031                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5032                         return -EINVAL;
5033         }
5034
5035         if (!rdev->ops->change_bss)
5036                 return -EOPNOTSUPP;
5037
5038         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5039             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5040                 return -EOPNOTSUPP;
5041
5042         wdev_lock(wdev);
5043         err = rdev_change_bss(rdev, dev, &params);
5044         wdev_unlock(wdev);
5045
5046         return err;
5047 }
5048
5049 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5050 {
5051         char *data = NULL;
5052         bool is_indoor;
5053         enum nl80211_user_reg_hint_type user_reg_hint_type;
5054         u32 owner_nlportid;
5055
5056
5057         /*
5058          * You should only get this when cfg80211 hasn't yet initialized
5059          * completely when built-in to the kernel right between the time
5060          * window between nl80211_init() and regulatory_init(), if that is
5061          * even possible.
5062          */
5063         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5064                 return -EINPROGRESS;
5065
5066         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5067                 user_reg_hint_type =
5068                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5069         else
5070                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5071
5072         switch (user_reg_hint_type) {
5073         case NL80211_USER_REG_HINT_USER:
5074         case NL80211_USER_REG_HINT_CELL_BASE:
5075                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5076                         return -EINVAL;
5077
5078                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5079                 return regulatory_hint_user(data, user_reg_hint_type);
5080         case NL80211_USER_REG_HINT_INDOOR:
5081                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5082                         owner_nlportid = info->snd_portid;
5083                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5084                 } else {
5085                         owner_nlportid = 0;
5086                         is_indoor = true;
5087                 }
5088
5089                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5090         default:
5091                 return -EINVAL;
5092         }
5093 }
5094
5095 static int nl80211_get_mesh_config(struct sk_buff *skb,
5096                                    struct genl_info *info)
5097 {
5098         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5099         struct net_device *dev = info->user_ptr[1];
5100         struct wireless_dev *wdev = dev->ieee80211_ptr;
5101         struct mesh_config cur_params;
5102         int err = 0;
5103         void *hdr;
5104         struct nlattr *pinfoattr;
5105         struct sk_buff *msg;
5106
5107         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5108                 return -EOPNOTSUPP;
5109
5110         if (!rdev->ops->get_mesh_config)
5111                 return -EOPNOTSUPP;
5112
5113         wdev_lock(wdev);
5114         /* If not connected, get default parameters */
5115         if (!wdev->mesh_id_len)
5116                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5117         else
5118                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5119         wdev_unlock(wdev);
5120
5121         if (err)
5122                 return err;
5123
5124         /* Draw up a netlink message to send back */
5125         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5126         if (!msg)
5127                 return -ENOMEM;
5128         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5129                              NL80211_CMD_GET_MESH_CONFIG);
5130         if (!hdr)
5131                 goto out;
5132         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5133         if (!pinfoattr)
5134                 goto nla_put_failure;
5135         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5136             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5137                         cur_params.dot11MeshRetryTimeout) ||
5138             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5139                         cur_params.dot11MeshConfirmTimeout) ||
5140             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5141                         cur_params.dot11MeshHoldingTimeout) ||
5142             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5143                         cur_params.dot11MeshMaxPeerLinks) ||
5144             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5145                        cur_params.dot11MeshMaxRetries) ||
5146             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5147                        cur_params.dot11MeshTTL) ||
5148             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5149                        cur_params.element_ttl) ||
5150             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5151                        cur_params.auto_open_plinks) ||
5152             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5153                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5154             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5155                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5156             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5157                         cur_params.path_refresh_time) ||
5158             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5159                         cur_params.min_discovery_timeout) ||
5160             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5161                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5162             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5163                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5164             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5165                         cur_params.dot11MeshHWMPperrMinInterval) ||
5166             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5167                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5168             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5169                        cur_params.dot11MeshHWMPRootMode) ||
5170             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5171                         cur_params.dot11MeshHWMPRannInterval) ||
5172             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5173                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5174             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5175                        cur_params.dot11MeshForwarding) ||
5176             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5177                         cur_params.rssi_threshold) ||
5178             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5179                         cur_params.ht_opmode) ||
5180             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5181                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5182             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5183                         cur_params.dot11MeshHWMProotInterval) ||
5184             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5185                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5186             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5187                         cur_params.power_mode) ||
5188             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5189                         cur_params.dot11MeshAwakeWindowDuration) ||
5190             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5191                         cur_params.plink_timeout))
5192                 goto nla_put_failure;
5193         nla_nest_end(msg, pinfoattr);
5194         genlmsg_end(msg, hdr);
5195         return genlmsg_reply(msg, info);
5196
5197  nla_put_failure:
5198         genlmsg_cancel(msg, hdr);
5199  out:
5200         nlmsg_free(msg);
5201         return -ENOBUFS;
5202 }
5203
5204 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5205         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5206         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5207         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5208         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5209         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5210         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5211         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5212         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5213         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5214         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5215         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5216         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5217         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5218         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5219         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5220         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5221         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5222         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5223         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5224         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5225         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5226         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5227         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5228         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5229         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5230         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5231         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5232         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5233 };
5234
5235 static const struct nla_policy
5236         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5237         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5238         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5239         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5240         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5241         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5242         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5243         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5244                                     .len = IEEE80211_MAX_DATA_LEN },
5245         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5246 };
5247
5248 static int nl80211_parse_mesh_config(struct genl_info *info,
5249                                      struct mesh_config *cfg,
5250                                      u32 *mask_out)
5251 {
5252         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5253         u32 mask = 0;
5254
5255 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5256 do {                                                                        \
5257         if (tb[attr]) {                                                     \
5258                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5259                         return -EINVAL;                                     \
5260                 cfg->param = fn(tb[attr]);                                  \
5261                 mask |= (1 << (attr - 1));                                  \
5262         }                                                                   \
5263 } while (0)
5264
5265
5266         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5267                 return -EINVAL;
5268         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5269                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5270                              nl80211_meshconf_params_policy))
5271                 return -EINVAL;
5272
5273         /* This makes sure that there aren't more than 32 mesh config
5274          * parameters (otherwise our bitfield scheme would not work.) */
5275         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5276
5277         /* Fill in the params struct */
5278         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5279                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5280                                   nla_get_u16);
5281         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5282                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5283                                   nla_get_u16);
5284         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5285                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5286                                   nla_get_u16);
5287         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5288                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5289                                   nla_get_u16);
5290         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5291                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5292                                   nla_get_u8);
5293         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5294                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5295         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5296                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5297                                   nla_get_u8);
5298         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5299                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5300                                   nla_get_u8);
5301         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5302                                   1, 255, mask,
5303                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5304                                   nla_get_u32);
5305         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5306                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5307                                   nla_get_u8);
5308         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5309                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5310                                   nla_get_u32);
5311         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5312                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5313                                   nla_get_u16);
5314         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5315                                   1, 65535, mask,
5316                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5317                                   nla_get_u32);
5318         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5319                                   1, 65535, mask,
5320                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5321                                   nla_get_u16);
5322         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5323                                   1, 65535, mask,
5324                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5325                                   nla_get_u16);
5326         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5327                                   dot11MeshHWMPnetDiameterTraversalTime,
5328                                   1, 65535, mask,
5329                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5330                                   nla_get_u16);
5331         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5332                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5333                                   nla_get_u8);
5334         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5335                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5336                                   nla_get_u16);
5337         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5338                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5339                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5340                                   nla_get_u8);
5341         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5342                                   mask, NL80211_MESHCONF_FORWARDING,
5343                                   nla_get_u8);
5344         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5345                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5346                                   nla_get_s32);
5347         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5348                                   mask, NL80211_MESHCONF_HT_OPMODE,
5349                                   nla_get_u16);
5350         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5351                                   1, 65535, mask,
5352                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5353                                   nla_get_u32);
5354         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5355                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5356                                   nla_get_u16);
5357         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5358                                   dot11MeshHWMPconfirmationInterval,
5359                                   1, 65535, mask,
5360                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5361                                   nla_get_u16);
5362         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5363                                   NL80211_MESH_POWER_ACTIVE,
5364                                   NL80211_MESH_POWER_MAX,
5365                                   mask, NL80211_MESHCONF_POWER_MODE,
5366                                   nla_get_u32);
5367         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5368                                   0, 65535, mask,
5369                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5370         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5371                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5372                                   nla_get_u32);
5373         if (mask_out)
5374                 *mask_out = mask;
5375
5376         return 0;
5377
5378 #undef FILL_IN_MESH_PARAM_IF_SET
5379 }
5380
5381 static int nl80211_parse_mesh_setup(struct genl_info *info,
5382                                      struct mesh_setup *setup)
5383 {
5384         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5385         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5386
5387         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5388                 return -EINVAL;
5389         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5390                              info->attrs[NL80211_ATTR_MESH_SETUP],
5391                              nl80211_mesh_setup_params_policy))
5392                 return -EINVAL;
5393
5394         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5395                 setup->sync_method =
5396                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5397                  IEEE80211_SYNC_METHOD_VENDOR :
5398                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5399
5400         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5401                 setup->path_sel_proto =
5402                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5403                  IEEE80211_PATH_PROTOCOL_VENDOR :
5404                  IEEE80211_PATH_PROTOCOL_HWMP;
5405
5406         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5407                 setup->path_metric =
5408                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5409                  IEEE80211_PATH_METRIC_VENDOR :
5410                  IEEE80211_PATH_METRIC_AIRTIME;
5411
5412
5413         if (tb[NL80211_MESH_SETUP_IE]) {
5414                 struct nlattr *ieattr =
5415                         tb[NL80211_MESH_SETUP_IE];
5416                 if (!is_valid_ie_attr(ieattr))
5417                         return -EINVAL;
5418                 setup->ie = nla_data(ieattr);
5419                 setup->ie_len = nla_len(ieattr);
5420         }
5421         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5422             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5423                 return -EINVAL;
5424         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5425         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5426         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5427         if (setup->is_secure)
5428                 setup->user_mpm = true;
5429
5430         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5431                 if (!setup->user_mpm)
5432                         return -EINVAL;
5433                 setup->auth_id =
5434                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5435         }
5436
5437         return 0;
5438 }
5439
5440 static int nl80211_update_mesh_config(struct sk_buff *skb,
5441                                       struct genl_info *info)
5442 {
5443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5444         struct net_device *dev = info->user_ptr[1];
5445         struct wireless_dev *wdev = dev->ieee80211_ptr;
5446         struct mesh_config cfg;
5447         u32 mask;
5448         int err;
5449
5450         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5451                 return -EOPNOTSUPP;
5452
5453         if (!rdev->ops->update_mesh_config)
5454                 return -EOPNOTSUPP;
5455
5456         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5457         if (err)
5458                 return err;
5459
5460         wdev_lock(wdev);
5461         if (!wdev->mesh_id_len)
5462                 err = -ENOLINK;
5463
5464         if (!err)
5465                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5466
5467         wdev_unlock(wdev);
5468
5469         return err;
5470 }
5471
5472 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5473                               struct sk_buff *msg)
5474 {
5475         struct nlattr *nl_reg_rules;
5476         unsigned int i;
5477
5478         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5479             (regdom->dfs_region &&
5480              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5481                 goto nla_put_failure;
5482
5483         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5484         if (!nl_reg_rules)
5485                 goto nla_put_failure;
5486
5487         for (i = 0; i < regdom->n_reg_rules; i++) {
5488                 struct nlattr *nl_reg_rule;
5489                 const struct ieee80211_reg_rule *reg_rule;
5490                 const struct ieee80211_freq_range *freq_range;
5491                 const struct ieee80211_power_rule *power_rule;
5492                 unsigned int max_bandwidth_khz;
5493
5494                 reg_rule = &regdom->reg_rules[i];
5495                 freq_range = &reg_rule->freq_range;
5496                 power_rule = &reg_rule->power_rule;
5497
5498                 nl_reg_rule = nla_nest_start(msg, i);
5499                 if (!nl_reg_rule)
5500                         goto nla_put_failure;
5501
5502                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5503                 if (!max_bandwidth_khz)
5504                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5505                                                                   reg_rule);
5506
5507                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5508                                 reg_rule->flags) ||
5509                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5510                                 freq_range->start_freq_khz) ||
5511                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5512                                 freq_range->end_freq_khz) ||
5513                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5514                                 max_bandwidth_khz) ||
5515                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5516                                 power_rule->max_antenna_gain) ||
5517                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5518                                 power_rule->max_eirp) ||
5519                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5520                                 reg_rule->dfs_cac_ms))
5521                         goto nla_put_failure;
5522
5523                 nla_nest_end(msg, nl_reg_rule);
5524         }
5525
5526         nla_nest_end(msg, nl_reg_rules);
5527         return 0;
5528
5529 nla_put_failure:
5530         return -EMSGSIZE;
5531 }
5532
5533 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5534 {
5535         const struct ieee80211_regdomain *regdom = NULL;
5536         struct cfg80211_registered_device *rdev;
5537         struct wiphy *wiphy = NULL;
5538         struct sk_buff *msg;
5539         void *hdr;
5540
5541         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5542         if (!msg)
5543                 return -ENOBUFS;
5544
5545         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5546                              NL80211_CMD_GET_REG);
5547         if (!hdr)
5548                 goto put_failure;
5549
5550         if (info->attrs[NL80211_ATTR_WIPHY]) {
5551                 bool self_managed;
5552
5553                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5554                 if (IS_ERR(rdev)) {
5555                         nlmsg_free(msg);
5556                         return PTR_ERR(rdev);
5557                 }
5558
5559                 wiphy = &rdev->wiphy;
5560                 self_managed = wiphy->regulatory_flags &
5561                                REGULATORY_WIPHY_SELF_MANAGED;
5562                 regdom = get_wiphy_regdom(wiphy);
5563
5564                 /* a self-managed-reg device must have a private regdom */
5565                 if (WARN_ON(!regdom && self_managed)) {
5566                         nlmsg_free(msg);
5567                         return -EINVAL;
5568                 }
5569
5570                 if (regdom &&
5571                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5572                         goto nla_put_failure;
5573         }
5574
5575         if (!wiphy && reg_last_request_cell_base() &&
5576             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5577                         NL80211_USER_REG_HINT_CELL_BASE))
5578                 goto nla_put_failure;
5579
5580         rcu_read_lock();
5581
5582         if (!regdom)
5583                 regdom = rcu_dereference(cfg80211_regdomain);
5584
5585         if (nl80211_put_regdom(regdom, msg))
5586                 goto nla_put_failure_rcu;
5587
5588         rcu_read_unlock();
5589
5590         genlmsg_end(msg, hdr);
5591         return genlmsg_reply(msg, info);
5592
5593 nla_put_failure_rcu:
5594         rcu_read_unlock();
5595 nla_put_failure:
5596         genlmsg_cancel(msg, hdr);
5597 put_failure:
5598         nlmsg_free(msg);
5599         return -EMSGSIZE;
5600 }
5601
5602 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5603                                u32 seq, int flags, struct wiphy *wiphy,
5604                                const struct ieee80211_regdomain *regdom)
5605 {
5606         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5607                                    NL80211_CMD_GET_REG);
5608
5609         if (!hdr)
5610                 return -1;
5611
5612         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5613
5614         if (nl80211_put_regdom(regdom, msg))
5615                 goto nla_put_failure;
5616
5617         if (!wiphy && reg_last_request_cell_base() &&
5618             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5619                         NL80211_USER_REG_HINT_CELL_BASE))
5620                 goto nla_put_failure;
5621
5622         if (wiphy &&
5623             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5624                 goto nla_put_failure;
5625
5626         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5627             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5628                 goto nla_put_failure;
5629
5630         genlmsg_end(msg, hdr);
5631         return 0;
5632
5633 nla_put_failure:
5634         genlmsg_cancel(msg, hdr);
5635         return -EMSGSIZE;
5636 }
5637
5638 static int nl80211_get_reg_dump(struct sk_buff *skb,
5639                                 struct netlink_callback *cb)
5640 {
5641         const struct ieee80211_regdomain *regdom = NULL;
5642         struct cfg80211_registered_device *rdev;
5643         int err, reg_idx, start = cb->args[2];
5644
5645         rtnl_lock();
5646
5647         if (cfg80211_regdomain && start == 0) {
5648                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5649                                           NLM_F_MULTI, NULL,
5650                                           rtnl_dereference(cfg80211_regdomain));
5651                 if (err < 0)
5652                         goto out_err;
5653         }
5654
5655         /* the global regdom is idx 0 */
5656         reg_idx = 1;
5657         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5658                 regdom = get_wiphy_regdom(&rdev->wiphy);
5659                 if (!regdom)
5660                         continue;
5661
5662                 if (++reg_idx <= start)
5663                         continue;
5664
5665                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5666                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5667                 if (err < 0) {
5668                         reg_idx--;
5669                         break;
5670                 }
5671         }
5672
5673         cb->args[2] = reg_idx;
5674         err = skb->len;
5675 out_err:
5676         rtnl_unlock();
5677         return err;
5678 }
5679
5680 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5681 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5682         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5683         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5684         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5685         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5686         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5687         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5688         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5689 };
5690
5691 static int parse_reg_rule(struct nlattr *tb[],
5692         struct ieee80211_reg_rule *reg_rule)
5693 {
5694         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5695         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5696
5697         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5698                 return -EINVAL;
5699         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5700                 return -EINVAL;
5701         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5702                 return -EINVAL;
5703         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5704                 return -EINVAL;
5705         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5706                 return -EINVAL;
5707
5708         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5709
5710         freq_range->start_freq_khz =
5711                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5712         freq_range->end_freq_khz =
5713                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5714         freq_range->max_bandwidth_khz =
5715                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5716
5717         power_rule->max_eirp =
5718                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5719
5720         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5721                 power_rule->max_antenna_gain =
5722                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5723
5724         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5725                 reg_rule->dfs_cac_ms =
5726                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5727
5728         return 0;
5729 }
5730
5731 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5732 {
5733         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5734         struct nlattr *nl_reg_rule;
5735         char *alpha2;
5736         int rem_reg_rules, r;
5737         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5738         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5739         struct ieee80211_regdomain *rd;
5740
5741         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5742                 return -EINVAL;
5743
5744         if (!info->attrs[NL80211_ATTR_REG_RULES])
5745                 return -EINVAL;
5746
5747         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5748
5749         if (info->attrs[NL80211_ATTR_DFS_REGION])
5750                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5751
5752         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5753                             rem_reg_rules) {
5754                 num_rules++;
5755                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5756                         return -EINVAL;
5757         }
5758
5759         if (!reg_is_valid_request(alpha2))
5760                 return -EINVAL;
5761
5762         size_of_regd = sizeof(struct ieee80211_regdomain) +
5763                        num_rules * sizeof(struct ieee80211_reg_rule);
5764
5765         rd = kzalloc(size_of_regd, GFP_KERNEL);
5766         if (!rd)
5767                 return -ENOMEM;
5768
5769         rd->n_reg_rules = num_rules;
5770         rd->alpha2[0] = alpha2[0];
5771         rd->alpha2[1] = alpha2[1];
5772
5773         /*
5774          * Disable DFS master mode if the DFS region was
5775          * not supported or known on this kernel.
5776          */
5777         if (reg_supported_dfs_region(dfs_region))
5778                 rd->dfs_region = dfs_region;
5779
5780         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5781                             rem_reg_rules) {
5782                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5783                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5784                               reg_rule_policy);
5785                 if (r)
5786                         goto bad_reg;
5787                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5788                 if (r)
5789                         goto bad_reg;
5790
5791                 rule_idx++;
5792
5793                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5794                         r = -EINVAL;
5795                         goto bad_reg;
5796                 }
5797         }
5798
5799         r = set_regdom(rd, REGD_SOURCE_CRDA);
5800         /* set_regdom took ownership */
5801         rd = NULL;
5802
5803  bad_reg:
5804         kfree(rd);
5805         return r;
5806 }
5807 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5808
5809 static int validate_scan_freqs(struct nlattr *freqs)
5810 {
5811         struct nlattr *attr1, *attr2;
5812         int n_channels = 0, tmp1, tmp2;
5813
5814         nla_for_each_nested(attr1, freqs, tmp1) {
5815                 n_channels++;
5816                 /*
5817                  * Some hardware has a limited channel list for
5818                  * scanning, and it is pretty much nonsensical
5819                  * to scan for a channel twice, so disallow that
5820                  * and don't require drivers to check that the
5821                  * channel list they get isn't longer than what
5822                  * they can scan, as long as they can scan all
5823                  * the channels they registered at once.
5824                  */
5825                 nla_for_each_nested(attr2, freqs, tmp2)
5826                         if (attr1 != attr2 &&
5827                             nla_get_u32(attr1) == nla_get_u32(attr2))
5828                                 return 0;
5829         }
5830
5831         return n_channels;
5832 }
5833
5834 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5835 {
5836         return b < NUM_NL80211_BANDS && wiphy->bands[b];
5837 }
5838
5839 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5840                             struct cfg80211_bss_selection *bss_select)
5841 {
5842         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5843         struct nlattr *nest;
5844         int err;
5845         bool found = false;
5846         int i;
5847
5848         /* only process one nested attribute */
5849         nest = nla_data(nla);
5850         if (!nla_ok(nest, nla_len(nest)))
5851                 return -EINVAL;
5852
5853         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
5854                         nla_len(nest), nl80211_bss_select_policy);
5855         if (err)
5856                 return err;
5857
5858         /* only one attribute may be given */
5859         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
5860                 if (attr[i]) {
5861                         if (found)
5862                                 return -EINVAL;
5863                         found = true;
5864                 }
5865         }
5866
5867         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
5868
5869         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
5870                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
5871
5872         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
5873                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
5874                 bss_select->param.band_pref =
5875                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
5876                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
5877                         return -EINVAL;
5878         }
5879
5880         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
5881                 struct nl80211_bss_select_rssi_adjust *adj_param;
5882
5883                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
5884                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
5885                 bss_select->param.adjust.band = adj_param->band;
5886                 bss_select->param.adjust.delta = adj_param->delta;
5887                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
5888                         return -EINVAL;
5889         }
5890
5891         /* user-space did not provide behaviour attribute */
5892         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
5893                 return -EINVAL;
5894
5895         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
5896                 return -EINVAL;
5897
5898         return 0;
5899 }
5900
5901 static int nl80211_parse_random_mac(struct nlattr **attrs,
5902                                     u8 *mac_addr, u8 *mac_addr_mask)
5903 {
5904         int i;
5905
5906         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5907                 eth_zero_addr(mac_addr);
5908                 eth_zero_addr(mac_addr_mask);
5909                 mac_addr[0] = 0x2;
5910                 mac_addr_mask[0] = 0x3;
5911
5912                 return 0;
5913         }
5914
5915         /* need both or none */
5916         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5917                 return -EINVAL;
5918
5919         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5920         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5921
5922         /* don't allow or configure an mcast address */
5923         if (!is_multicast_ether_addr(mac_addr_mask) ||
5924             is_multicast_ether_addr(mac_addr))
5925                 return -EINVAL;
5926
5927         /*
5928          * allow users to pass a MAC address that has bits set outside
5929          * of the mask, but don't bother drivers with having to deal
5930          * with such bits
5931          */
5932         for (i = 0; i < ETH_ALEN; i++)
5933                 mac_addr[i] &= mac_addr_mask[i];
5934
5935         return 0;
5936 }
5937
5938 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5939 {
5940         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5941         struct wireless_dev *wdev = info->user_ptr[1];
5942         struct cfg80211_scan_request *request;
5943         struct nlattr *attr;
5944         struct wiphy *wiphy;
5945         int err, tmp, n_ssids = 0, n_channels, i;
5946         size_t ie_len;
5947
5948         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5949                 return -EINVAL;
5950
5951         wiphy = &rdev->wiphy;
5952
5953         if (!rdev->ops->scan)
5954                 return -EOPNOTSUPP;
5955
5956         if (rdev->scan_req || rdev->scan_msg) {
5957                 err = -EBUSY;
5958                 goto unlock;
5959         }
5960
5961         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5962                 n_channels = validate_scan_freqs(
5963                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5964                 if (!n_channels) {
5965                         err = -EINVAL;
5966                         goto unlock;
5967                 }
5968         } else {
5969                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5970         }
5971
5972         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5973                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5974                         n_ssids++;
5975
5976         if (n_ssids > wiphy->max_scan_ssids) {
5977                 err = -EINVAL;
5978                 goto unlock;
5979         }
5980
5981         if (info->attrs[NL80211_ATTR_IE])
5982                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5983         else
5984                 ie_len = 0;
5985
5986         if (ie_len > wiphy->max_scan_ie_len) {
5987                 err = -EINVAL;
5988                 goto unlock;
5989         }
5990
5991         request = kzalloc(sizeof(*request)
5992                         + sizeof(*request->ssids) * n_ssids
5993                         + sizeof(*request->channels) * n_channels
5994                         + ie_len, GFP_KERNEL);
5995         if (!request) {
5996                 err = -ENOMEM;
5997                 goto unlock;
5998         }
5999
6000         if (n_ssids)
6001                 request->ssids = (void *)&request->channels[n_channels];
6002         request->n_ssids = n_ssids;
6003         if (ie_len) {
6004                 if (n_ssids)
6005                         request->ie = (void *)(request->ssids + n_ssids);
6006                 else
6007                         request->ie = (void *)(request->channels + n_channels);
6008         }
6009
6010         i = 0;
6011         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6012                 /* user specified, bail out if channel not found */
6013                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6014                         struct ieee80211_channel *chan;
6015
6016                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6017
6018                         if (!chan) {
6019                                 err = -EINVAL;
6020                                 goto out_free;
6021                         }
6022
6023                         /* ignore disabled channels */
6024                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6025                                 continue;
6026
6027                         request->channels[i] = chan;
6028                         i++;
6029                 }
6030         } else {
6031                 enum nl80211_band band;
6032
6033                 /* all channels */
6034                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6035                         int j;
6036                         if (!wiphy->bands[band])
6037                                 continue;
6038                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6039                                 struct ieee80211_channel *chan;
6040
6041                                 chan = &wiphy->bands[band]->channels[j];
6042
6043                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6044                                         continue;
6045
6046                                 request->channels[i] = chan;
6047                                 i++;
6048                         }
6049                 }
6050         }
6051
6052         if (!i) {
6053                 err = -EINVAL;
6054                 goto out_free;
6055         }
6056
6057         request->n_channels = i;
6058
6059         i = 0;
6060         if (n_ssids) {
6061                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6062                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6063                                 err = -EINVAL;
6064                                 goto out_free;
6065                         }
6066                         request->ssids[i].ssid_len = nla_len(attr);
6067                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6068                         i++;
6069                 }
6070         }
6071
6072         if (info->attrs[NL80211_ATTR_IE]) {
6073                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6074                 memcpy((void *)request->ie,
6075                        nla_data(info->attrs[NL80211_ATTR_IE]),
6076                        request->ie_len);
6077         }
6078
6079         for (i = 0; i < NUM_NL80211_BANDS; i++)
6080                 if (wiphy->bands[i])
6081                         request->rates[i] =
6082                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6083
6084         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6085                 nla_for_each_nested(attr,
6086                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6087                                     tmp) {
6088                         enum nl80211_band band = nla_type(attr);
6089
6090                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6091                                 err = -EINVAL;
6092                                 goto out_free;
6093                         }
6094
6095                         if (!wiphy->bands[band])
6096                                 continue;
6097
6098                         err = ieee80211_get_ratemask(wiphy->bands[band],
6099                                                      nla_data(attr),
6100                                                      nla_len(attr),
6101                                                      &request->rates[band]);
6102                         if (err)
6103                                 goto out_free;
6104                 }
6105         }
6106
6107         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6108                 request->flags = nla_get_u32(
6109                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6110                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6111                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6112                         err = -EOPNOTSUPP;
6113                         goto out_free;
6114                 }
6115
6116                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6117                         if (!(wiphy->features &
6118                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6119                                 err = -EOPNOTSUPP;
6120                                 goto out_free;
6121                         }
6122
6123                         if (wdev->current_bss) {
6124                                 err = -EOPNOTSUPP;
6125                                 goto out_free;
6126                         }
6127
6128                         err = nl80211_parse_random_mac(info->attrs,
6129                                                        request->mac_addr,
6130                                                        request->mac_addr_mask);
6131                         if (err)
6132                                 goto out_free;
6133                 }
6134         }
6135
6136         request->no_cck =
6137                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6138
6139         if (info->attrs[NL80211_ATTR_MAC])
6140                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6141                        ETH_ALEN);
6142         else
6143                 eth_broadcast_addr(request->bssid);
6144
6145         request->wdev = wdev;
6146         request->wiphy = &rdev->wiphy;
6147         request->scan_start = jiffies;
6148
6149         rdev->scan_req = request;
6150         err = rdev_scan(rdev, request);
6151
6152         if (!err) {
6153                 nl80211_send_scan_start(rdev, wdev);
6154                 if (wdev->netdev)
6155                         dev_hold(wdev->netdev);
6156         } else {
6157  out_free:
6158                 rdev->scan_req = NULL;
6159                 kfree(request);
6160         }
6161
6162  unlock:
6163         return err;
6164 }
6165
6166 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6167 {
6168         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6169         struct wireless_dev *wdev = info->user_ptr[1];
6170
6171         if (!rdev->ops->abort_scan)
6172                 return -EOPNOTSUPP;
6173
6174         if (rdev->scan_msg)
6175                 return 0;
6176
6177         if (!rdev->scan_req)
6178                 return -ENOENT;
6179
6180         rdev_abort_scan(rdev, wdev);
6181         return 0;
6182 }
6183
6184 static int
6185 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6186                                struct cfg80211_sched_scan_request *request,
6187                                struct nlattr **attrs)
6188 {
6189         int tmp, err, i = 0;
6190         struct nlattr *attr;
6191
6192         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6193                 u32 interval;
6194
6195                 /*
6196                  * If scan plans are not specified,
6197                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6198                  * case one scan plan will be set with the specified scan
6199                  * interval and infinite number of iterations.
6200                  */
6201                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6202                         return -EINVAL;
6203
6204                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6205                 if (!interval)
6206                         return -EINVAL;
6207
6208                 request->scan_plans[0].interval =
6209                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6210                 if (!request->scan_plans[0].interval)
6211                         return -EINVAL;
6212
6213                 if (request->scan_plans[0].interval >
6214                     wiphy->max_sched_scan_plan_interval)
6215                         request->scan_plans[0].interval =
6216                                 wiphy->max_sched_scan_plan_interval;
6217
6218                 return 0;
6219         }
6220
6221         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6222                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6223
6224                 if (WARN_ON(i >= n_plans))
6225                         return -EINVAL;
6226
6227                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6228                                 nla_data(attr), nla_len(attr),
6229                                 nl80211_plan_policy);
6230                 if (err)
6231                         return err;
6232
6233                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6234                         return -EINVAL;
6235
6236                 request->scan_plans[i].interval =
6237                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6238                 if (!request->scan_plans[i].interval ||
6239                     request->scan_plans[i].interval >
6240                     wiphy->max_sched_scan_plan_interval)
6241                         return -EINVAL;
6242
6243                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6244                         request->scan_plans[i].iterations =
6245                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6246                         if (!request->scan_plans[i].iterations ||
6247                             (request->scan_plans[i].iterations >
6248                              wiphy->max_sched_scan_plan_iterations))
6249                                 return -EINVAL;
6250                 } else if (i < n_plans - 1) {
6251                         /*
6252                          * All scan plans but the last one must specify
6253                          * a finite number of iterations
6254                          */
6255                         return -EINVAL;
6256                 }
6257
6258                 i++;
6259         }
6260
6261         /*
6262          * The last scan plan must not specify the number of
6263          * iterations, it is supposed to run infinitely
6264          */
6265         if (request->scan_plans[n_plans - 1].iterations)
6266                 return  -EINVAL;
6267
6268         return 0;
6269 }
6270
6271 static struct cfg80211_sched_scan_request *
6272 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6273                          struct nlattr **attrs)
6274 {
6275         struct cfg80211_sched_scan_request *request;
6276         struct nlattr *attr;
6277         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6278         enum nl80211_band band;
6279         size_t ie_len;
6280         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6281         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6282
6283         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6284                 return ERR_PTR(-EINVAL);
6285
6286         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6287                 n_channels = validate_scan_freqs(
6288                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6289                 if (!n_channels)
6290                         return ERR_PTR(-EINVAL);
6291         } else {
6292                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6293         }
6294
6295         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6296                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6297                                     tmp)
6298                         n_ssids++;
6299
6300         if (n_ssids > wiphy->max_sched_scan_ssids)
6301                 return ERR_PTR(-EINVAL);
6302
6303         /*
6304          * First, count the number of 'real' matchsets. Due to an issue with
6305          * the old implementation, matchsets containing only the RSSI attribute
6306          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6307          * RSSI for all matchsets, rather than their own matchset for reporting
6308          * all APs with a strong RSSI. This is needed to be compatible with
6309          * older userspace that treated a matchset with only the RSSI as the
6310          * global RSSI for all other matchsets - if there are other matchsets.
6311          */
6312         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6313                 nla_for_each_nested(attr,
6314                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6315                                     tmp) {
6316                         struct nlattr *rssi;
6317
6318                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6319                                         nla_data(attr), nla_len(attr),
6320                                         nl80211_match_policy);
6321                         if (err)
6322                                 return ERR_PTR(err);
6323                         /* add other standalone attributes here */
6324                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6325                                 n_match_sets++;
6326                                 continue;
6327                         }
6328                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6329                         if (rssi)
6330                                 default_match_rssi = nla_get_s32(rssi);
6331                 }
6332         }
6333
6334         /* However, if there's no other matchset, add the RSSI one */
6335         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6336                 n_match_sets = 1;
6337
6338         if (n_match_sets > wiphy->max_match_sets)
6339                 return ERR_PTR(-EINVAL);
6340
6341         if (attrs[NL80211_ATTR_IE])
6342                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6343         else
6344                 ie_len = 0;
6345
6346         if (ie_len > wiphy->max_sched_scan_ie_len)
6347                 return ERR_PTR(-EINVAL);
6348
6349         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6350                 /*
6351                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6352                  * each scan plan already specifies its own interval
6353                  */
6354                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6355                         return ERR_PTR(-EINVAL);
6356
6357                 nla_for_each_nested(attr,
6358                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6359                         n_plans++;
6360         } else {
6361                 /*
6362                  * The scan interval attribute is kept for backward
6363                  * compatibility. If no scan plans are specified and sched scan
6364                  * interval is specified, one scan plan will be set with this
6365                  * scan interval and infinite number of iterations.
6366                  */
6367                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6368                         return ERR_PTR(-EINVAL);
6369
6370                 n_plans = 1;
6371         }
6372
6373         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6374                 return ERR_PTR(-EINVAL);
6375
6376         request = kzalloc(sizeof(*request)
6377                         + sizeof(*request->ssids) * n_ssids
6378                         + sizeof(*request->match_sets) * n_match_sets
6379                         + sizeof(*request->scan_plans) * n_plans
6380                         + sizeof(*request->channels) * n_channels
6381                         + ie_len, GFP_KERNEL);
6382         if (!request)
6383                 return ERR_PTR(-ENOMEM);
6384
6385         if (n_ssids)
6386                 request->ssids = (void *)&request->channels[n_channels];
6387         request->n_ssids = n_ssids;
6388         if (ie_len) {
6389                 if (n_ssids)
6390                         request->ie = (void *)(request->ssids + n_ssids);
6391                 else
6392                         request->ie = (void *)(request->channels + n_channels);
6393         }
6394
6395         if (n_match_sets) {
6396                 if (request->ie)
6397                         request->match_sets = (void *)(request->ie + ie_len);
6398                 else if (n_ssids)
6399                         request->match_sets =
6400                                 (void *)(request->ssids + n_ssids);
6401                 else
6402                         request->match_sets =
6403                                 (void *)(request->channels + n_channels);
6404         }
6405         request->n_match_sets = n_match_sets;
6406
6407         if (n_match_sets)
6408                 request->scan_plans = (void *)(request->match_sets +
6409                                                n_match_sets);
6410         else if (request->ie)
6411                 request->scan_plans = (void *)(request->ie + ie_len);
6412         else if (n_ssids)
6413                 request->scan_plans = (void *)(request->ssids + n_ssids);
6414         else
6415                 request->scan_plans = (void *)(request->channels + n_channels);
6416
6417         request->n_scan_plans = n_plans;
6418
6419         i = 0;
6420         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6421                 /* user specified, bail out if channel not found */
6422                 nla_for_each_nested(attr,
6423                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6424                                     tmp) {
6425                         struct ieee80211_channel *chan;
6426
6427                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6428
6429                         if (!chan) {
6430                                 err = -EINVAL;
6431                                 goto out_free;
6432                         }
6433
6434                         /* ignore disabled channels */
6435                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6436                                 continue;
6437
6438                         request->channels[i] = chan;
6439                         i++;
6440                 }
6441         } else {
6442                 /* all channels */
6443                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6444                         int j;
6445                         if (!wiphy->bands[band])
6446                                 continue;
6447                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6448                                 struct ieee80211_channel *chan;
6449
6450                                 chan = &wiphy->bands[band]->channels[j];
6451
6452                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6453                                         continue;
6454
6455                                 request->channels[i] = chan;
6456                                 i++;
6457                         }
6458                 }
6459         }
6460
6461         if (!i) {
6462                 err = -EINVAL;
6463                 goto out_free;
6464         }
6465
6466         request->n_channels = i;
6467
6468         i = 0;
6469         if (n_ssids) {
6470                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6471                                     tmp) {
6472                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6473                                 err = -EINVAL;
6474                                 goto out_free;
6475                         }
6476                         request->ssids[i].ssid_len = nla_len(attr);
6477                         memcpy(request->ssids[i].ssid, nla_data(attr),
6478                                nla_len(attr));
6479                         i++;
6480                 }
6481         }
6482
6483         i = 0;
6484         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6485                 nla_for_each_nested(attr,
6486                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6487                                     tmp) {
6488                         struct nlattr *ssid, *rssi;
6489
6490                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6491                                         nla_data(attr), nla_len(attr),
6492                                         nl80211_match_policy);
6493                         if (err)
6494                                 goto out_free;
6495                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6496                         if (ssid) {
6497                                 if (WARN_ON(i >= n_match_sets)) {
6498                                         /* this indicates a programming error,
6499                                          * the loop above should have verified
6500                                          * things properly
6501                                          */
6502                                         err = -EINVAL;
6503                                         goto out_free;
6504                                 }
6505
6506                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6507                                         err = -EINVAL;
6508                                         goto out_free;
6509                                 }
6510                                 memcpy(request->match_sets[i].ssid.ssid,
6511                                        nla_data(ssid), nla_len(ssid));
6512                                 request->match_sets[i].ssid.ssid_len =
6513                                         nla_len(ssid);
6514                                 /* special attribute - old implemenation w/a */
6515                                 request->match_sets[i].rssi_thold =
6516                                         default_match_rssi;
6517                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6518                                 if (rssi)
6519                                         request->match_sets[i].rssi_thold =
6520                                                 nla_get_s32(rssi);
6521                         }
6522                         i++;
6523                 }
6524
6525                 /* there was no other matchset, so the RSSI one is alone */
6526                 if (i == 0 && n_match_sets)
6527                         request->match_sets[0].rssi_thold = default_match_rssi;
6528
6529                 request->min_rssi_thold = INT_MAX;
6530                 for (i = 0; i < n_match_sets; i++)
6531                         request->min_rssi_thold =
6532                                 min(request->match_sets[i].rssi_thold,
6533                                     request->min_rssi_thold);
6534         } else {
6535                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6536         }
6537
6538         if (ie_len) {
6539                 request->ie_len = ie_len;
6540                 memcpy((void *)request->ie,
6541                        nla_data(attrs[NL80211_ATTR_IE]),
6542                        request->ie_len);
6543         }
6544
6545         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6546                 request->flags = nla_get_u32(
6547                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6548                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6549                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6550                         err = -EOPNOTSUPP;
6551                         goto out_free;
6552                 }
6553
6554                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6555                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6556
6557                         if (!wdev) /* must be net-detect */
6558                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6559
6560                         if (!(wiphy->features & flg)) {
6561                                 err = -EOPNOTSUPP;
6562                                 goto out_free;
6563                         }
6564
6565                         if (wdev && wdev->current_bss) {
6566                                 err = -EOPNOTSUPP;
6567                                 goto out_free;
6568                         }
6569
6570                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6571                                                        request->mac_addr_mask);
6572                         if (err)
6573                                 goto out_free;
6574                 }
6575         }
6576
6577         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6578                 request->delay =
6579                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6580
6581         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6582         if (err)
6583                 goto out_free;
6584
6585         request->scan_start = jiffies;
6586
6587         return request;
6588
6589 out_free:
6590         kfree(request);
6591         return ERR_PTR(err);
6592 }
6593
6594 static int nl80211_start_sched_scan(struct sk_buff *skb,
6595                                     struct genl_info *info)
6596 {
6597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6598         struct net_device *dev = info->user_ptr[1];
6599         struct wireless_dev *wdev = dev->ieee80211_ptr;
6600         struct cfg80211_sched_scan_request *sched_scan_req;
6601         int err;
6602
6603         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6604             !rdev->ops->sched_scan_start)
6605                 return -EOPNOTSUPP;
6606
6607         if (rdev->sched_scan_req)
6608                 return -EINPROGRESS;
6609
6610         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6611                                                   info->attrs);
6612
6613         err = PTR_ERR_OR_ZERO(sched_scan_req);
6614         if (err)
6615                 goto out_err;
6616
6617         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6618         if (err)
6619                 goto out_free;
6620
6621         sched_scan_req->dev = dev;
6622         sched_scan_req->wiphy = &rdev->wiphy;
6623
6624         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6625                 sched_scan_req->owner_nlportid = info->snd_portid;
6626
6627         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6628
6629         nl80211_send_sched_scan(rdev, dev,
6630                                 NL80211_CMD_START_SCHED_SCAN);
6631         return 0;
6632
6633 out_free:
6634         kfree(sched_scan_req);
6635 out_err:
6636         return err;
6637 }
6638
6639 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6640                                    struct genl_info *info)
6641 {
6642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6643
6644         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6645             !rdev->ops->sched_scan_stop)
6646                 return -EOPNOTSUPP;
6647
6648         return __cfg80211_stop_sched_scan(rdev, false);
6649 }
6650
6651 static int nl80211_start_radar_detection(struct sk_buff *skb,
6652                                          struct genl_info *info)
6653 {
6654         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6655         struct net_device *dev = info->user_ptr[1];
6656         struct wireless_dev *wdev = dev->ieee80211_ptr;
6657         struct cfg80211_chan_def chandef;
6658         enum nl80211_dfs_regions dfs_region;
6659         unsigned int cac_time_ms;
6660         int err;
6661
6662         dfs_region = reg_get_dfs_region(wdev->wiphy);
6663         if (dfs_region == NL80211_DFS_UNSET)
6664                 return -EINVAL;
6665
6666         err = nl80211_parse_chandef(rdev, info, &chandef);
6667         if (err)
6668                 return err;
6669
6670         if (netif_carrier_ok(dev))
6671                 return -EBUSY;
6672
6673         if (wdev->cac_started)
6674                 return -EBUSY;
6675
6676         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6677                                             wdev->iftype);
6678         if (err < 0)
6679                 return err;
6680
6681         if (err == 0)
6682                 return -EINVAL;
6683
6684         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6685                 return -EINVAL;
6686
6687         if (!rdev->ops->start_radar_detection)
6688                 return -EOPNOTSUPP;
6689
6690         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6691         if (WARN_ON(!cac_time_ms))
6692                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6693
6694         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6695         if (!err) {
6696                 wdev->chandef = chandef;
6697                 wdev->cac_started = true;
6698                 wdev->cac_start_time = jiffies;
6699                 wdev->cac_time_ms = cac_time_ms;
6700         }
6701         return err;
6702 }
6703
6704 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6705 {
6706         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6707         struct net_device *dev = info->user_ptr[1];
6708         struct wireless_dev *wdev = dev->ieee80211_ptr;
6709         struct cfg80211_csa_settings params;
6710         /* csa_attrs is defined static to avoid waste of stack size - this
6711          * function is called under RTNL lock, so this should not be a problem.
6712          */
6713         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6714         int err;
6715         bool need_new_beacon = false;
6716         int len, i;
6717         u32 cs_count;
6718
6719         if (!rdev->ops->channel_switch ||
6720             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6721                 return -EOPNOTSUPP;
6722
6723         switch (dev->ieee80211_ptr->iftype) {
6724         case NL80211_IFTYPE_AP:
6725         case NL80211_IFTYPE_P2P_GO:
6726                 need_new_beacon = true;
6727
6728                 /* useless if AP is not running */
6729                 if (!wdev->beacon_interval)
6730                         return -ENOTCONN;
6731                 break;
6732         case NL80211_IFTYPE_ADHOC:
6733                 if (!wdev->ssid_len)
6734                         return -ENOTCONN;
6735                 break;
6736         case NL80211_IFTYPE_MESH_POINT:
6737                 if (!wdev->mesh_id_len)
6738                         return -ENOTCONN;
6739                 break;
6740         default:
6741                 return -EOPNOTSUPP;
6742         }
6743
6744         memset(&params, 0, sizeof(params));
6745
6746         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6747             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6748                 return -EINVAL;
6749
6750         /* only important for AP, IBSS and mesh create IEs internally */
6751         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6752                 return -EINVAL;
6753
6754         /* Even though the attribute is u32, the specification says
6755          * u8, so let's make sure we don't overflow.
6756          */
6757         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6758         if (cs_count > 255)
6759                 return -EINVAL;
6760
6761         params.count = cs_count;
6762
6763         if (!need_new_beacon)
6764                 goto skip_beacons;
6765
6766         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6767         if (err)
6768                 return err;
6769
6770         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6771                                info->attrs[NL80211_ATTR_CSA_IES],
6772                                nl80211_policy);
6773         if (err)
6774                 return err;
6775
6776         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6777         if (err)
6778                 return err;
6779
6780         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6781                 return -EINVAL;
6782
6783         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6784         if (!len || (len % sizeof(u16)))
6785                 return -EINVAL;
6786
6787         params.n_counter_offsets_beacon = len / sizeof(u16);
6788         if (rdev->wiphy.max_num_csa_counters &&
6789             (params.n_counter_offsets_beacon >
6790              rdev->wiphy.max_num_csa_counters))
6791                 return -EINVAL;
6792
6793         params.counter_offsets_beacon =
6794                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6795
6796         /* sanity checks - counters should fit and be the same */
6797         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6798                 u16 offset = params.counter_offsets_beacon[i];
6799
6800                 if (offset >= params.beacon_csa.tail_len)
6801                         return -EINVAL;
6802
6803                 if (params.beacon_csa.tail[offset] != params.count)
6804                         return -EINVAL;
6805         }
6806
6807         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6808                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6809                 if (!len || (len % sizeof(u16)))
6810                         return -EINVAL;
6811
6812                 params.n_counter_offsets_presp = len / sizeof(u16);
6813                 if (rdev->wiphy.max_num_csa_counters &&
6814                     (params.n_counter_offsets_beacon >
6815                      rdev->wiphy.max_num_csa_counters))
6816                         return -EINVAL;
6817
6818                 params.counter_offsets_presp =
6819                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6820
6821                 /* sanity checks - counters should fit and be the same */
6822                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6823                         u16 offset = params.counter_offsets_presp[i];
6824
6825                         if (offset >= params.beacon_csa.probe_resp_len)
6826                                 return -EINVAL;
6827
6828                         if (params.beacon_csa.probe_resp[offset] !=
6829                             params.count)
6830                                 return -EINVAL;
6831                 }
6832         }
6833
6834 skip_beacons:
6835         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6836         if (err)
6837                 return err;
6838
6839         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6840                                            wdev->iftype))
6841                 return -EINVAL;
6842
6843         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6844                                             &params.chandef,
6845                                             wdev->iftype);
6846         if (err < 0)
6847                 return err;
6848
6849         if (err > 0)
6850                 params.radar_required = true;
6851
6852         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6853                 params.block_tx = true;
6854
6855         wdev_lock(wdev);
6856         err = rdev_channel_switch(rdev, dev, &params);
6857         wdev_unlock(wdev);
6858
6859         return err;
6860 }
6861
6862 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6863                             u32 seq, int flags,
6864                             struct cfg80211_registered_device *rdev,
6865                             struct wireless_dev *wdev,
6866                             struct cfg80211_internal_bss *intbss)
6867 {
6868         struct cfg80211_bss *res = &intbss->pub;
6869         const struct cfg80211_bss_ies *ies;
6870         void *hdr;
6871         struct nlattr *bss;
6872
6873         ASSERT_WDEV_LOCK(wdev);
6874
6875         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6876                              NL80211_CMD_NEW_SCAN_RESULTS);
6877         if (!hdr)
6878                 return -1;
6879
6880         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6881
6882         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6883                 goto nla_put_failure;
6884         if (wdev->netdev &&
6885             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6886                 goto nla_put_failure;
6887         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
6888                               NL80211_ATTR_PAD))
6889                 goto nla_put_failure;
6890
6891         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6892         if (!bss)
6893                 goto nla_put_failure;
6894         if ((!is_zero_ether_addr(res->bssid) &&
6895              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6896                 goto nla_put_failure;
6897
6898         rcu_read_lock();
6899         /* indicate whether we have probe response data or not */
6900         if (rcu_access_pointer(res->proberesp_ies) &&
6901             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6902                 goto fail_unlock_rcu;
6903
6904         /* this pointer prefers to be pointed to probe response data
6905          * but is always valid
6906          */
6907         ies = rcu_dereference(res->ies);
6908         if (ies) {
6909                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
6910                                       NL80211_BSS_PAD))
6911                         goto fail_unlock_rcu;
6912                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6913                                         ies->len, ies->data))
6914                         goto fail_unlock_rcu;
6915         }
6916
6917         /* and this pointer is always (unless driver didn't know) beacon data */
6918         ies = rcu_dereference(res->beacon_ies);
6919         if (ies && ies->from_beacon) {
6920                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
6921                                       NL80211_BSS_PAD))
6922                         goto fail_unlock_rcu;
6923                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6924                                         ies->len, ies->data))
6925                         goto fail_unlock_rcu;
6926         }
6927         rcu_read_unlock();
6928
6929         if (res->beacon_interval &&
6930             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6931                 goto nla_put_failure;
6932         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6933             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6934             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6935             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6936                         jiffies_to_msecs(jiffies - intbss->ts)))
6937                 goto nla_put_failure;
6938
6939         if (intbss->ts_boottime &&
6940             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6941                               intbss->ts_boottime, NL80211_BSS_PAD))
6942                 goto nla_put_failure;
6943
6944         switch (rdev->wiphy.signal_type) {
6945         case CFG80211_SIGNAL_TYPE_MBM:
6946                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6947                         goto nla_put_failure;
6948                 break;
6949         case CFG80211_SIGNAL_TYPE_UNSPEC:
6950                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6951                         goto nla_put_failure;
6952                 break;
6953         default:
6954                 break;
6955         }
6956
6957         switch (wdev->iftype) {
6958         case NL80211_IFTYPE_P2P_CLIENT:
6959         case NL80211_IFTYPE_STATION:
6960                 if (intbss == wdev->current_bss &&
6961                     nla_put_u32(msg, NL80211_BSS_STATUS,
6962                                 NL80211_BSS_STATUS_ASSOCIATED))
6963                         goto nla_put_failure;
6964                 break;
6965         case NL80211_IFTYPE_ADHOC:
6966                 if (intbss == wdev->current_bss &&
6967                     nla_put_u32(msg, NL80211_BSS_STATUS,
6968                                 NL80211_BSS_STATUS_IBSS_JOINED))
6969                         goto nla_put_failure;
6970                 break;
6971         default:
6972                 break;
6973         }
6974
6975         nla_nest_end(msg, bss);
6976
6977         genlmsg_end(msg, hdr);
6978         return 0;
6979
6980  fail_unlock_rcu:
6981         rcu_read_unlock();
6982  nla_put_failure:
6983         genlmsg_cancel(msg, hdr);
6984         return -EMSGSIZE;
6985 }
6986
6987 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6988 {
6989         struct cfg80211_registered_device *rdev;
6990         struct cfg80211_internal_bss *scan;
6991         struct wireless_dev *wdev;
6992         int start = cb->args[2], idx = 0;
6993         int err;
6994
6995         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6996         if (err)
6997                 return err;
6998
6999         wdev_lock(wdev);
7000         spin_lock_bh(&rdev->bss_lock);
7001         cfg80211_bss_expire(rdev);
7002
7003         cb->seq = rdev->bss_generation;
7004
7005         list_for_each_entry(scan, &rdev->bss_list, list) {
7006                 if (++idx <= start)
7007                         continue;
7008                 if (nl80211_send_bss(skb, cb,
7009                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7010                                 rdev, wdev, scan) < 0) {
7011                         idx--;
7012                         break;
7013                 }
7014         }
7015
7016         spin_unlock_bh(&rdev->bss_lock);
7017         wdev_unlock(wdev);
7018
7019         cb->args[2] = idx;
7020         nl80211_finish_wdev_dump(rdev);
7021
7022         return skb->len;
7023 }
7024
7025 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7026                                int flags, struct net_device *dev,
7027                                bool allow_radio_stats,
7028                                struct survey_info *survey)
7029 {
7030         void *hdr;
7031         struct nlattr *infoattr;
7032
7033         /* skip radio stats if userspace didn't request them */
7034         if (!survey->channel && !allow_radio_stats)
7035                 return 0;
7036
7037         hdr = nl80211hdr_put(msg, portid, seq, flags,
7038                              NL80211_CMD_NEW_SURVEY_RESULTS);
7039         if (!hdr)
7040                 return -ENOMEM;
7041
7042         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7043                 goto nla_put_failure;
7044
7045         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7046         if (!infoattr)
7047                 goto nla_put_failure;
7048
7049         if (survey->channel &&
7050             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7051                         survey->channel->center_freq))
7052                 goto nla_put_failure;
7053
7054         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7055             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7056                 goto nla_put_failure;
7057         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7058             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7059                 goto nla_put_failure;
7060         if ((survey->filled & SURVEY_INFO_TIME) &&
7061             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7062                         survey->time, NL80211_SURVEY_INFO_PAD))
7063                 goto nla_put_failure;
7064         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7065             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7066                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7067                 goto nla_put_failure;
7068         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7069             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7070                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7071                 goto nla_put_failure;
7072         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7073             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7074                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7075                 goto nla_put_failure;
7076         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7077             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7078                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7079                 goto nla_put_failure;
7080         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7081             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7082                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7083                 goto nla_put_failure;
7084
7085         nla_nest_end(msg, infoattr);
7086
7087         genlmsg_end(msg, hdr);
7088         return 0;
7089
7090  nla_put_failure:
7091         genlmsg_cancel(msg, hdr);
7092         return -EMSGSIZE;
7093 }
7094
7095 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7096 {
7097         struct survey_info survey;
7098         struct cfg80211_registered_device *rdev;
7099         struct wireless_dev *wdev;
7100         int survey_idx = cb->args[2];
7101         int res;
7102         bool radio_stats;
7103
7104         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7105         if (res)
7106                 return res;
7107
7108         /* prepare_wdev_dump parsed the attributes */
7109         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7110
7111         if (!wdev->netdev) {
7112                 res = -EINVAL;
7113                 goto out_err;
7114         }
7115
7116         if (!rdev->ops->dump_survey) {
7117                 res = -EOPNOTSUPP;
7118                 goto out_err;
7119         }
7120
7121         while (1) {
7122                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7123                 if (res == -ENOENT)
7124                         break;
7125                 if (res)
7126                         goto out_err;
7127
7128                 /* don't send disabled channels, but do send non-channel data */
7129                 if (survey.channel &&
7130                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7131                         survey_idx++;
7132                         continue;
7133                 }
7134
7135                 if (nl80211_send_survey(skb,
7136                                 NETLINK_CB(cb->skb).portid,
7137                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7138                                 wdev->netdev, radio_stats, &survey) < 0)
7139                         goto out;
7140                 survey_idx++;
7141         }
7142
7143  out:
7144         cb->args[2] = survey_idx;
7145         res = skb->len;
7146  out_err:
7147         nl80211_finish_wdev_dump(rdev);
7148         return res;
7149 }
7150
7151 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7152 {
7153         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7154                                   NL80211_WPA_VERSION_2));
7155 }
7156
7157 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7158 {
7159         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7160         struct net_device *dev = info->user_ptr[1];
7161         struct ieee80211_channel *chan;
7162         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7163         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7164         enum nl80211_auth_type auth_type;
7165         struct key_parse key;
7166         bool local_state_change;
7167
7168         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7169                 return -EINVAL;
7170
7171         if (!info->attrs[NL80211_ATTR_MAC])
7172                 return -EINVAL;
7173
7174         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7175                 return -EINVAL;
7176
7177         if (!info->attrs[NL80211_ATTR_SSID])
7178                 return -EINVAL;
7179
7180         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7181                 return -EINVAL;
7182
7183         err = nl80211_parse_key(info, &key);
7184         if (err)
7185                 return err;
7186
7187         if (key.idx >= 0) {
7188                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7189                         return -EINVAL;
7190                 if (!key.p.key || !key.p.key_len)
7191                         return -EINVAL;
7192                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7193                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7194                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7195                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7196                         return -EINVAL;
7197                 if (key.idx > 4)
7198                         return -EINVAL;
7199         } else {
7200                 key.p.key_len = 0;
7201                 key.p.key = NULL;
7202         }
7203
7204         if (key.idx >= 0) {
7205                 int i;
7206                 bool ok = false;
7207                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7208                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7209                                 ok = true;
7210                                 break;
7211                         }
7212                 }
7213                 if (!ok)
7214                         return -EINVAL;
7215         }
7216
7217         if (!rdev->ops->auth)
7218                 return -EOPNOTSUPP;
7219
7220         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7221             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7222                 return -EOPNOTSUPP;
7223
7224         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7225         chan = nl80211_get_valid_chan(&rdev->wiphy,
7226                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7227         if (!chan)
7228                 return -EINVAL;
7229
7230         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7231         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7232
7233         if (info->attrs[NL80211_ATTR_IE]) {
7234                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7235                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7236         }
7237
7238         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7239         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7240                 return -EINVAL;
7241
7242         if (auth_type == NL80211_AUTHTYPE_SAE &&
7243             !info->attrs[NL80211_ATTR_SAE_DATA])
7244                 return -EINVAL;
7245
7246         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7247                 if (auth_type != NL80211_AUTHTYPE_SAE)
7248                         return -EINVAL;
7249                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7250                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7251                 /* need to include at least Auth Transaction and Status Code */
7252                 if (sae_data_len < 4)
7253                         return -EINVAL;
7254         }
7255
7256         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7257
7258         /*
7259          * Since we no longer track auth state, ignore
7260          * requests to only change local state.
7261          */
7262         if (local_state_change)
7263                 return 0;
7264
7265         wdev_lock(dev->ieee80211_ptr);
7266         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7267                                  ssid, ssid_len, ie, ie_len,
7268                                  key.p.key, key.p.key_len, key.idx,
7269                                  sae_data, sae_data_len);
7270         wdev_unlock(dev->ieee80211_ptr);
7271         return err;
7272 }
7273
7274 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7275                                    struct genl_info *info,
7276                                    struct cfg80211_crypto_settings *settings,
7277                                    int cipher_limit)
7278 {
7279         memset(settings, 0, sizeof(*settings));
7280
7281         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7282
7283         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7284                 u16 proto;
7285                 proto = nla_get_u16(
7286                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7287                 settings->control_port_ethertype = cpu_to_be16(proto);
7288                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7289                     proto != ETH_P_PAE)
7290                         return -EINVAL;
7291                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7292                         settings->control_port_no_encrypt = true;
7293         } else
7294                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7295
7296         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7297                 void *data;
7298                 int len, i;
7299
7300                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7301                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7302                 settings->n_ciphers_pairwise = len / sizeof(u32);
7303
7304                 if (len % sizeof(u32))
7305                         return -EINVAL;
7306
7307                 if (settings->n_ciphers_pairwise > cipher_limit)
7308                         return -EINVAL;
7309
7310                 memcpy(settings->ciphers_pairwise, data, len);
7311
7312                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7313                         if (!cfg80211_supported_cipher_suite(
7314                                         &rdev->wiphy,
7315                                         settings->ciphers_pairwise[i]))
7316                                 return -EINVAL;
7317         }
7318
7319         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7320                 settings->cipher_group =
7321                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7322                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7323                                                      settings->cipher_group))
7324                         return -EINVAL;
7325         }
7326
7327         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7328                 settings->wpa_versions =
7329                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7330                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7331                         return -EINVAL;
7332         }
7333
7334         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7335                 void *data;
7336                 int len;
7337
7338                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7339                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7340                 settings->n_akm_suites = len / sizeof(u32);
7341
7342                 if (len % sizeof(u32))
7343                         return -EINVAL;
7344
7345                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7346                         return -EINVAL;
7347
7348                 memcpy(settings->akm_suites, data, len);
7349         }
7350
7351         return 0;
7352 }
7353
7354 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7355 {
7356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7357         struct net_device *dev = info->user_ptr[1];
7358         struct ieee80211_channel *chan;
7359         struct cfg80211_assoc_request req = {};
7360         const u8 *bssid, *ssid;
7361         int err, ssid_len = 0;
7362
7363         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7364                 return -EINVAL;
7365
7366         if (!info->attrs[NL80211_ATTR_MAC] ||
7367             !info->attrs[NL80211_ATTR_SSID] ||
7368             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7369                 return -EINVAL;
7370
7371         if (!rdev->ops->assoc)
7372                 return -EOPNOTSUPP;
7373
7374         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7375             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7376                 return -EOPNOTSUPP;
7377
7378         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7379
7380         chan = nl80211_get_valid_chan(&rdev->wiphy,
7381                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7382         if (!chan)
7383                 return -EINVAL;
7384
7385         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7386         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7387
7388         if (info->attrs[NL80211_ATTR_IE]) {
7389                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7390                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7391         }
7392
7393         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7394                 enum nl80211_mfp mfp =
7395                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7396                 if (mfp == NL80211_MFP_REQUIRED)
7397                         req.use_mfp = true;
7398                 else if (mfp != NL80211_MFP_NO)
7399                         return -EINVAL;
7400         }
7401
7402         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7403                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7404
7405         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7406                 req.flags |= ASSOC_REQ_DISABLE_HT;
7407
7408         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7409                 memcpy(&req.ht_capa_mask,
7410                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7411                        sizeof(req.ht_capa_mask));
7412
7413         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7414                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7415                         return -EINVAL;
7416                 memcpy(&req.ht_capa,
7417                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7418                        sizeof(req.ht_capa));
7419         }
7420
7421         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7422                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7423
7424         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7425                 memcpy(&req.vht_capa_mask,
7426                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7427                        sizeof(req.vht_capa_mask));
7428
7429         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7430                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7431                         return -EINVAL;
7432                 memcpy(&req.vht_capa,
7433                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7434                        sizeof(req.vht_capa));
7435         }
7436
7437         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7438                 if (!((rdev->wiphy.features &
7439                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7440                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7441                     !wiphy_ext_feature_isset(&rdev->wiphy,
7442                                              NL80211_EXT_FEATURE_RRM))
7443                         return -EINVAL;
7444                 req.flags |= ASSOC_REQ_USE_RRM;
7445         }
7446
7447         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7448         if (!err) {
7449                 wdev_lock(dev->ieee80211_ptr);
7450                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7451                                           ssid, ssid_len, &req);
7452                 wdev_unlock(dev->ieee80211_ptr);
7453         }
7454
7455         return err;
7456 }
7457
7458 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7459 {
7460         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7461         struct net_device *dev = info->user_ptr[1];
7462         const u8 *ie = NULL, *bssid;
7463         int ie_len = 0, err;
7464         u16 reason_code;
7465         bool local_state_change;
7466
7467         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7468                 return -EINVAL;
7469
7470         if (!info->attrs[NL80211_ATTR_MAC])
7471                 return -EINVAL;
7472
7473         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7474                 return -EINVAL;
7475
7476         if (!rdev->ops->deauth)
7477                 return -EOPNOTSUPP;
7478
7479         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7480             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7481                 return -EOPNOTSUPP;
7482
7483         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7484
7485         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7486         if (reason_code == 0) {
7487                 /* Reason Code 0 is reserved */
7488                 return -EINVAL;
7489         }
7490
7491         if (info->attrs[NL80211_ATTR_IE]) {
7492                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7493                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7494         }
7495
7496         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7497
7498         wdev_lock(dev->ieee80211_ptr);
7499         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7500                                    local_state_change);
7501         wdev_unlock(dev->ieee80211_ptr);
7502         return err;
7503 }
7504
7505 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7506 {
7507         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7508         struct net_device *dev = info->user_ptr[1];
7509         const u8 *ie = NULL, *bssid;
7510         int ie_len = 0, err;
7511         u16 reason_code;
7512         bool local_state_change;
7513
7514         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7515                 return -EINVAL;
7516
7517         if (!info->attrs[NL80211_ATTR_MAC])
7518                 return -EINVAL;
7519
7520         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7521                 return -EINVAL;
7522
7523         if (!rdev->ops->disassoc)
7524                 return -EOPNOTSUPP;
7525
7526         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7527             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7528                 return -EOPNOTSUPP;
7529
7530         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7531
7532         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7533         if (reason_code == 0) {
7534                 /* Reason Code 0 is reserved */
7535                 return -EINVAL;
7536         }
7537
7538         if (info->attrs[NL80211_ATTR_IE]) {
7539                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7540                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7541         }
7542
7543         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7544
7545         wdev_lock(dev->ieee80211_ptr);
7546         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7547                                      local_state_change);
7548         wdev_unlock(dev->ieee80211_ptr);
7549         return err;
7550 }
7551
7552 static bool
7553 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7554                          int mcast_rate[NUM_NL80211_BANDS],
7555                          int rateval)
7556 {
7557         struct wiphy *wiphy = &rdev->wiphy;
7558         bool found = false;
7559         int band, i;
7560
7561         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7562                 struct ieee80211_supported_band *sband;
7563
7564                 sband = wiphy->bands[band];
7565                 if (!sband)
7566                         continue;
7567
7568                 for (i = 0; i < sband->n_bitrates; i++) {
7569                         if (sband->bitrates[i].bitrate == rateval) {
7570                                 mcast_rate[band] = i + 1;
7571                                 found = true;
7572                                 break;
7573                         }
7574                 }
7575         }
7576
7577         return found;
7578 }
7579
7580 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7581 {
7582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7583         struct net_device *dev = info->user_ptr[1];
7584         struct cfg80211_ibss_params ibss;
7585         struct wiphy *wiphy;
7586         struct cfg80211_cached_keys *connkeys = NULL;
7587         int err;
7588
7589         memset(&ibss, 0, sizeof(ibss));
7590
7591         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7592                 return -EINVAL;
7593
7594         if (!info->attrs[NL80211_ATTR_SSID] ||
7595             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7596                 return -EINVAL;
7597
7598         ibss.beacon_interval = 100;
7599
7600         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7601                 ibss.beacon_interval =
7602                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7603                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7604                         return -EINVAL;
7605         }
7606
7607         if (!rdev->ops->join_ibss)
7608                 return -EOPNOTSUPP;
7609
7610         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7611                 return -EOPNOTSUPP;
7612
7613         wiphy = &rdev->wiphy;
7614
7615         if (info->attrs[NL80211_ATTR_MAC]) {
7616                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7617
7618                 if (!is_valid_ether_addr(ibss.bssid))
7619                         return -EINVAL;
7620         }
7621         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7622         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7623
7624         if (info->attrs[NL80211_ATTR_IE]) {
7625                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7626                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7627         }
7628
7629         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7630         if (err)
7631                 return err;
7632
7633         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7634                                      NL80211_IFTYPE_ADHOC))
7635                 return -EINVAL;
7636
7637         switch (ibss.chandef.width) {
7638         case NL80211_CHAN_WIDTH_5:
7639         case NL80211_CHAN_WIDTH_10:
7640         case NL80211_CHAN_WIDTH_20_NOHT:
7641                 break;
7642         case NL80211_CHAN_WIDTH_20:
7643         case NL80211_CHAN_WIDTH_40:
7644                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7645                         return -EINVAL;
7646                 break;
7647         case NL80211_CHAN_WIDTH_80:
7648         case NL80211_CHAN_WIDTH_80P80:
7649         case NL80211_CHAN_WIDTH_160:
7650                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7651                         return -EINVAL;
7652                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7653                                              NL80211_EXT_FEATURE_VHT_IBSS))
7654                         return -EINVAL;
7655                 break;
7656         default:
7657                 return -EINVAL;
7658         }
7659
7660         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7661         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7662
7663         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7664                 u8 *rates =
7665                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7666                 int n_rates =
7667                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7668                 struct ieee80211_supported_band *sband =
7669                         wiphy->bands[ibss.chandef.chan->band];
7670
7671                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7672                                              &ibss.basic_rates);
7673                 if (err)
7674                         return err;
7675         }
7676
7677         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7678                 memcpy(&ibss.ht_capa_mask,
7679                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7680                        sizeof(ibss.ht_capa_mask));
7681
7682         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7683                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7684                         return -EINVAL;
7685                 memcpy(&ibss.ht_capa,
7686                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7687                        sizeof(ibss.ht_capa));
7688         }
7689
7690         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7691             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7692                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7693                 return -EINVAL;
7694
7695         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7696                 bool no_ht = false;
7697
7698                 connkeys = nl80211_parse_connkeys(rdev,
7699                                           info->attrs[NL80211_ATTR_KEYS],
7700                                           &no_ht);
7701                 if (IS_ERR(connkeys))
7702                         return PTR_ERR(connkeys);
7703
7704                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7705                     no_ht) {
7706                         kzfree(connkeys);
7707                         return -EINVAL;
7708                 }
7709         }
7710
7711         ibss.control_port =
7712                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7713
7714         ibss.userspace_handles_dfs =
7715                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7716
7717         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7718         if (err)
7719                 kzfree(connkeys);
7720         return err;
7721 }
7722
7723 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7724 {
7725         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7726         struct net_device *dev = info->user_ptr[1];
7727
7728         if (!rdev->ops->leave_ibss)
7729                 return -EOPNOTSUPP;
7730
7731         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7732                 return -EOPNOTSUPP;
7733
7734         return cfg80211_leave_ibss(rdev, dev, false);
7735 }
7736
7737 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7738 {
7739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7740         struct net_device *dev = info->user_ptr[1];
7741         int mcast_rate[NUM_NL80211_BANDS];
7742         u32 nla_rate;
7743         int err;
7744
7745         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7746             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7747             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7748                 return -EOPNOTSUPP;
7749
7750         if (!rdev->ops->set_mcast_rate)
7751                 return -EOPNOTSUPP;
7752
7753         memset(mcast_rate, 0, sizeof(mcast_rate));
7754
7755         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7756                 return -EINVAL;
7757
7758         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7759         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7760                 return -EINVAL;
7761
7762         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7763
7764         return err;
7765 }
7766
7767 static struct sk_buff *
7768 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7769                             struct wireless_dev *wdev, int approxlen,
7770                             u32 portid, u32 seq, enum nl80211_commands cmd,
7771                             enum nl80211_attrs attr,
7772                             const struct nl80211_vendor_cmd_info *info,
7773                             gfp_t gfp)
7774 {
7775         struct sk_buff *skb;
7776         void *hdr;
7777         struct nlattr *data;
7778
7779         skb = nlmsg_new(approxlen + 100, gfp);
7780         if (!skb)
7781                 return NULL;
7782
7783         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7784         if (!hdr) {
7785                 kfree_skb(skb);
7786                 return NULL;
7787         }
7788
7789         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7790                 goto nla_put_failure;
7791
7792         if (info) {
7793                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7794                                 info->vendor_id))
7795                         goto nla_put_failure;
7796                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7797                                 info->subcmd))
7798                         goto nla_put_failure;
7799         }
7800
7801         if (wdev) {
7802                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
7803                                       wdev_id(wdev), NL80211_ATTR_PAD))
7804                         goto nla_put_failure;
7805                 if (wdev->netdev &&
7806                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7807                                 wdev->netdev->ifindex))
7808                         goto nla_put_failure;
7809         }
7810
7811         data = nla_nest_start(skb, attr);
7812
7813         ((void **)skb->cb)[0] = rdev;
7814         ((void **)skb->cb)[1] = hdr;
7815         ((void **)skb->cb)[2] = data;
7816
7817         return skb;
7818
7819  nla_put_failure:
7820         kfree_skb(skb);
7821         return NULL;
7822 }
7823
7824 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7825                                            struct wireless_dev *wdev,
7826                                            enum nl80211_commands cmd,
7827                                            enum nl80211_attrs attr,
7828                                            int vendor_event_idx,
7829                                            int approxlen, gfp_t gfp)
7830 {
7831         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7832         const struct nl80211_vendor_cmd_info *info;
7833
7834         switch (cmd) {
7835         case NL80211_CMD_TESTMODE:
7836                 if (WARN_ON(vendor_event_idx != -1))
7837                         return NULL;
7838                 info = NULL;
7839                 break;
7840         case NL80211_CMD_VENDOR:
7841                 if (WARN_ON(vendor_event_idx < 0 ||
7842                             vendor_event_idx >= wiphy->n_vendor_events))
7843                         return NULL;
7844                 info = &wiphy->vendor_events[vendor_event_idx];
7845                 break;
7846         default:
7847                 WARN_ON(1);
7848                 return NULL;
7849         }
7850
7851         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7852                                            cmd, attr, info, gfp);
7853 }
7854 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7855
7856 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7857 {
7858         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7859         void *hdr = ((void **)skb->cb)[1];
7860         struct nlattr *data = ((void **)skb->cb)[2];
7861         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7862
7863         /* clear CB data for netlink core to own from now on */
7864         memset(skb->cb, 0, sizeof(skb->cb));
7865
7866         nla_nest_end(skb, data);
7867         genlmsg_end(skb, hdr);
7868
7869         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7870                 mcgrp = NL80211_MCGRP_VENDOR;
7871
7872         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7873                                 mcgrp, gfp);
7874 }
7875 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7876
7877 #ifdef CONFIG_NL80211_TESTMODE
7878 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7879 {
7880         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7881         struct wireless_dev *wdev =
7882                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7883         int err;
7884
7885         if (!rdev->ops->testmode_cmd)
7886                 return -EOPNOTSUPP;
7887
7888         if (IS_ERR(wdev)) {
7889                 err = PTR_ERR(wdev);
7890                 if (err != -EINVAL)
7891                         return err;
7892                 wdev = NULL;
7893         } else if (wdev->wiphy != &rdev->wiphy) {
7894                 return -EINVAL;
7895         }
7896
7897         if (!info->attrs[NL80211_ATTR_TESTDATA])
7898                 return -EINVAL;
7899
7900         rdev->cur_cmd_info = info;
7901         err = rdev_testmode_cmd(rdev, wdev,
7902                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7903                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7904         rdev->cur_cmd_info = NULL;
7905
7906         return err;
7907 }
7908
7909 static int nl80211_testmode_dump(struct sk_buff *skb,
7910                                  struct netlink_callback *cb)
7911 {
7912         struct cfg80211_registered_device *rdev;
7913         int err;
7914         long phy_idx;
7915         void *data = NULL;
7916         int data_len = 0;
7917
7918         rtnl_lock();
7919
7920         if (cb->args[0]) {
7921                 /*
7922                  * 0 is a valid index, but not valid for args[0],
7923                  * so we need to offset by 1.
7924                  */
7925                 phy_idx = cb->args[0] - 1;
7926         } else {
7927                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7928                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7929                                   nl80211_policy);
7930                 if (err)
7931                         goto out_err;
7932
7933                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7934                                                   nl80211_fam.attrbuf);
7935                 if (IS_ERR(rdev)) {
7936                         err = PTR_ERR(rdev);
7937                         goto out_err;
7938                 }
7939                 phy_idx = rdev->wiphy_idx;
7940                 rdev = NULL;
7941
7942                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7943                         cb->args[1] =
7944                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7945         }
7946
7947         if (cb->args[1]) {
7948                 data = nla_data((void *)cb->args[1]);
7949                 data_len = nla_len((void *)cb->args[1]);
7950         }
7951
7952         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7953         if (!rdev) {
7954                 err = -ENOENT;
7955                 goto out_err;
7956         }
7957
7958         if (!rdev->ops->testmode_dump) {
7959                 err = -EOPNOTSUPP;
7960                 goto out_err;
7961         }
7962
7963         while (1) {
7964                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7965                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7966                                            NL80211_CMD_TESTMODE);
7967                 struct nlattr *tmdata;
7968
7969                 if (!hdr)
7970                         break;
7971
7972                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7973                         genlmsg_cancel(skb, hdr);
7974                         break;
7975                 }
7976
7977                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7978                 if (!tmdata) {
7979                         genlmsg_cancel(skb, hdr);
7980                         break;
7981                 }
7982                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7983                 nla_nest_end(skb, tmdata);
7984
7985                 if (err == -ENOBUFS || err == -ENOENT) {
7986                         genlmsg_cancel(skb, hdr);
7987                         break;
7988                 } else if (err) {
7989                         genlmsg_cancel(skb, hdr);
7990                         goto out_err;
7991                 }
7992
7993                 genlmsg_end(skb, hdr);
7994         }
7995
7996         err = skb->len;
7997         /* see above */
7998         cb->args[0] = phy_idx + 1;
7999  out_err:
8000         rtnl_unlock();
8001         return err;
8002 }
8003 #endif
8004
8005 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8006 {
8007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8008         struct net_device *dev = info->user_ptr[1];
8009         struct cfg80211_connect_params connect;
8010         struct wiphy *wiphy;
8011         struct cfg80211_cached_keys *connkeys = NULL;
8012         int err;
8013
8014         memset(&connect, 0, sizeof(connect));
8015
8016         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8017                 return -EINVAL;
8018
8019         if (!info->attrs[NL80211_ATTR_SSID] ||
8020             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8021                 return -EINVAL;
8022
8023         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8024                 connect.auth_type =
8025                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8026                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8027                                              NL80211_CMD_CONNECT))
8028                         return -EINVAL;
8029         } else
8030                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8031
8032         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8033
8034         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8035                                       NL80211_MAX_NR_CIPHER_SUITES);
8036         if (err)
8037                 return err;
8038
8039         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8040             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8041                 return -EOPNOTSUPP;
8042
8043         wiphy = &rdev->wiphy;
8044
8045         connect.bg_scan_period = -1;
8046         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8047                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8048                 connect.bg_scan_period =
8049                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8050         }
8051
8052         if (info->attrs[NL80211_ATTR_MAC])
8053                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8054         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8055                 connect.bssid_hint =
8056                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8057         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8058         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8059
8060         if (info->attrs[NL80211_ATTR_IE]) {
8061                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8062                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8063         }
8064
8065         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8066                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8067                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8068                     connect.mfp != NL80211_MFP_NO)
8069                         return -EINVAL;
8070         } else {
8071                 connect.mfp = NL80211_MFP_NO;
8072         }
8073
8074         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8075                 connect.prev_bssid =
8076                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8077
8078         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8079                 connect.channel = nl80211_get_valid_chan(
8080                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8081                 if (!connect.channel)
8082                         return -EINVAL;
8083         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8084                 connect.channel_hint = nl80211_get_valid_chan(
8085                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8086                 if (!connect.channel_hint)
8087                         return -EINVAL;
8088         }
8089
8090         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8091                 connkeys = nl80211_parse_connkeys(rdev,
8092                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8093                 if (IS_ERR(connkeys))
8094                         return PTR_ERR(connkeys);
8095         }
8096
8097         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8098                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8099
8100         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8101                 memcpy(&connect.ht_capa_mask,
8102                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8103                        sizeof(connect.ht_capa_mask));
8104
8105         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8106                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8107                         kzfree(connkeys);
8108                         return -EINVAL;
8109                 }
8110                 memcpy(&connect.ht_capa,
8111                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8112                        sizeof(connect.ht_capa));
8113         }
8114
8115         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8116                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8117
8118         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8119                 memcpy(&connect.vht_capa_mask,
8120                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8121                        sizeof(connect.vht_capa_mask));
8122
8123         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8124                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8125                         kzfree(connkeys);
8126                         return -EINVAL;
8127                 }
8128                 memcpy(&connect.vht_capa,
8129                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8130                        sizeof(connect.vht_capa));
8131         }
8132
8133         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8134                 if (!((rdev->wiphy.features &
8135                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8136                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8137                     !wiphy_ext_feature_isset(&rdev->wiphy,
8138                                              NL80211_EXT_FEATURE_RRM)) {
8139                         kzfree(connkeys);
8140                         return -EINVAL;
8141                 }
8142                 connect.flags |= ASSOC_REQ_USE_RRM;
8143         }
8144
8145         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8146         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8147                 kzfree(connkeys);
8148                 return -EOPNOTSUPP;
8149         }
8150
8151         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8152                 /* bss selection makes no sense if bssid is set */
8153                 if (connect.bssid) {
8154                         kzfree(connkeys);
8155                         return -EINVAL;
8156                 }
8157
8158                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8159                                        wiphy, &connect.bss_select);
8160                 if (err) {
8161                         kzfree(connkeys);
8162                         return err;
8163                 }
8164         }
8165
8166         wdev_lock(dev->ieee80211_ptr);
8167         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8168                                connect.prev_bssid);
8169         wdev_unlock(dev->ieee80211_ptr);
8170         if (err)
8171                 kzfree(connkeys);
8172         return err;
8173 }
8174
8175 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8176 {
8177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8178         struct net_device *dev = info->user_ptr[1];
8179         u16 reason;
8180         int ret;
8181
8182         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8183                 reason = WLAN_REASON_DEAUTH_LEAVING;
8184         else
8185                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8186
8187         if (reason == 0)
8188                 return -EINVAL;
8189
8190         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8191             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8192                 return -EOPNOTSUPP;
8193
8194         wdev_lock(dev->ieee80211_ptr);
8195         ret = cfg80211_disconnect(rdev, dev, reason, true);
8196         wdev_unlock(dev->ieee80211_ptr);
8197         return ret;
8198 }
8199
8200 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8201 {
8202         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8203         struct net *net;
8204         int err;
8205
8206         if (info->attrs[NL80211_ATTR_PID]) {
8207                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8208
8209                 net = get_net_ns_by_pid(pid);
8210         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8211                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8212
8213                 net = get_net_ns_by_fd(fd);
8214         } else {
8215                 return -EINVAL;
8216         }
8217
8218         if (IS_ERR(net))
8219                 return PTR_ERR(net);
8220
8221         err = 0;
8222
8223         /* check if anything to do */
8224         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8225                 err = cfg80211_switch_netns(rdev, net);
8226
8227         put_net(net);
8228         return err;
8229 }
8230
8231 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8232 {
8233         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8234         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8235                         struct cfg80211_pmksa *pmksa) = NULL;
8236         struct net_device *dev = info->user_ptr[1];
8237         struct cfg80211_pmksa pmksa;
8238
8239         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8240
8241         if (!info->attrs[NL80211_ATTR_MAC])
8242                 return -EINVAL;
8243
8244         if (!info->attrs[NL80211_ATTR_PMKID])
8245                 return -EINVAL;
8246
8247         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8248         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8249
8250         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8251             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8252                 return -EOPNOTSUPP;
8253
8254         switch (info->genlhdr->cmd) {
8255         case NL80211_CMD_SET_PMKSA:
8256                 rdev_ops = rdev->ops->set_pmksa;
8257                 break;
8258         case NL80211_CMD_DEL_PMKSA:
8259                 rdev_ops = rdev->ops->del_pmksa;
8260                 break;
8261         default:
8262                 WARN_ON(1);
8263                 break;
8264         }
8265
8266         if (!rdev_ops)
8267                 return -EOPNOTSUPP;
8268
8269         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8270 }
8271
8272 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8273 {
8274         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8275         struct net_device *dev = info->user_ptr[1];
8276
8277         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8278             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8279                 return -EOPNOTSUPP;
8280
8281         if (!rdev->ops->flush_pmksa)
8282                 return -EOPNOTSUPP;
8283
8284         return rdev_flush_pmksa(rdev, dev);
8285 }
8286
8287 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8288 {
8289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8290         struct net_device *dev = info->user_ptr[1];
8291         u8 action_code, dialog_token;
8292         u32 peer_capability = 0;
8293         u16 status_code;
8294         u8 *peer;
8295         bool initiator;
8296
8297         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8298             !rdev->ops->tdls_mgmt)
8299                 return -EOPNOTSUPP;
8300
8301         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8302             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8303             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8304             !info->attrs[NL80211_ATTR_IE] ||
8305             !info->attrs[NL80211_ATTR_MAC])
8306                 return -EINVAL;
8307
8308         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8309         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8310         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8311         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8312         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8313         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8314                 peer_capability =
8315                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8316
8317         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8318                               dialog_token, status_code, peer_capability,
8319                               initiator,
8320                               nla_data(info->attrs[NL80211_ATTR_IE]),
8321                               nla_len(info->attrs[NL80211_ATTR_IE]));
8322 }
8323
8324 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8325 {
8326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8327         struct net_device *dev = info->user_ptr[1];
8328         enum nl80211_tdls_operation operation;
8329         u8 *peer;
8330
8331         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8332             !rdev->ops->tdls_oper)
8333                 return -EOPNOTSUPP;
8334
8335         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8336             !info->attrs[NL80211_ATTR_MAC])
8337                 return -EINVAL;
8338
8339         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8340         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8341
8342         return rdev_tdls_oper(rdev, dev, peer, operation);
8343 }
8344
8345 static int nl80211_remain_on_channel(struct sk_buff *skb,
8346                                      struct genl_info *info)
8347 {
8348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8349         struct wireless_dev *wdev = info->user_ptr[1];
8350         struct cfg80211_chan_def chandef;
8351         struct sk_buff *msg;
8352         void *hdr;
8353         u64 cookie;
8354         u32 duration;
8355         int err;
8356
8357         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8358             !info->attrs[NL80211_ATTR_DURATION])
8359                 return -EINVAL;
8360
8361         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8362
8363         if (!rdev->ops->remain_on_channel ||
8364             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8365                 return -EOPNOTSUPP;
8366
8367         /*
8368          * We should be on that channel for at least a minimum amount of
8369          * time (10ms) but no longer than the driver supports.
8370          */
8371         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8372             duration > rdev->wiphy.max_remain_on_channel_duration)
8373                 return -EINVAL;
8374
8375         err = nl80211_parse_chandef(rdev, info, &chandef);
8376         if (err)
8377                 return err;
8378
8379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8380         if (!msg)
8381                 return -ENOMEM;
8382
8383         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8384                              NL80211_CMD_REMAIN_ON_CHANNEL);
8385         if (!hdr) {
8386                 err = -ENOBUFS;
8387                 goto free_msg;
8388         }
8389
8390         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8391                                      duration, &cookie);
8392
8393         if (err)
8394                 goto free_msg;
8395
8396         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8397                               NL80211_ATTR_PAD))
8398                 goto nla_put_failure;
8399
8400         genlmsg_end(msg, hdr);
8401
8402         return genlmsg_reply(msg, info);
8403
8404  nla_put_failure:
8405         err = -ENOBUFS;
8406  free_msg:
8407         nlmsg_free(msg);
8408         return err;
8409 }
8410
8411 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8412                                             struct genl_info *info)
8413 {
8414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8415         struct wireless_dev *wdev = info->user_ptr[1];
8416         u64 cookie;
8417
8418         if (!info->attrs[NL80211_ATTR_COOKIE])
8419                 return -EINVAL;
8420
8421         if (!rdev->ops->cancel_remain_on_channel)
8422                 return -EOPNOTSUPP;
8423
8424         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8425
8426         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8427 }
8428
8429 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8430                            u8 *rates, u8 rates_len)
8431 {
8432         u8 i;
8433         u32 mask = 0;
8434
8435         for (i = 0; i < rates_len; i++) {
8436                 int rate = (rates[i] & 0x7f) * 5;
8437                 int ridx;
8438                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8439                         struct ieee80211_rate *srate =
8440                                 &sband->bitrates[ridx];
8441                         if (rate == srate->bitrate) {
8442                                 mask |= 1 << ridx;
8443                                 break;
8444                         }
8445                 }
8446                 if (ridx == sband->n_bitrates)
8447                         return 0; /* rate not found */
8448         }
8449
8450         return mask;
8451 }
8452
8453 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8454                                u8 *rates, u8 rates_len,
8455                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8456 {
8457         u8 i;
8458
8459         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8460
8461         for (i = 0; i < rates_len; i++) {
8462                 int ridx, rbit;
8463
8464                 ridx = rates[i] / 8;
8465                 rbit = BIT(rates[i] % 8);
8466
8467                 /* check validity */
8468                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8469                         return false;
8470
8471                 /* check availability */
8472                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8473                         mcs[ridx] |= rbit;
8474                 else
8475                         return false;
8476         }
8477
8478         return true;
8479 }
8480
8481 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8482 {
8483         u16 mcs_mask = 0;
8484
8485         switch (vht_mcs_map) {
8486         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8487                 break;
8488         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8489                 mcs_mask = 0x00FF;
8490                 break;
8491         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8492                 mcs_mask = 0x01FF;
8493                 break;
8494         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8495                 mcs_mask = 0x03FF;
8496                 break;
8497         default:
8498                 break;
8499         }
8500
8501         return mcs_mask;
8502 }
8503
8504 static void vht_build_mcs_mask(u16 vht_mcs_map,
8505                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8506 {
8507         u8 nss;
8508
8509         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8510                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8511                 vht_mcs_map >>= 2;
8512         }
8513 }
8514
8515 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8516                              struct nl80211_txrate_vht *txrate,
8517                              u16 mcs[NL80211_VHT_NSS_MAX])
8518 {
8519         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8520         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8521         u8 i;
8522
8523         if (!sband->vht_cap.vht_supported)
8524                 return false;
8525
8526         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8527
8528         /* Build vht_mcs_mask from VHT capabilities */
8529         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8530
8531         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8532                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8533                         mcs[i] = txrate->mcs[i];
8534                 else
8535                         return false;
8536         }
8537
8538         return true;
8539 }
8540
8541 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8542         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8543                                     .len = NL80211_MAX_SUPP_RATES },
8544         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8545                                 .len = NL80211_MAX_SUPP_HT_RATES },
8546         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8547         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8548 };
8549
8550 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8551                                        struct genl_info *info)
8552 {
8553         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8554         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8555         struct cfg80211_bitrate_mask mask;
8556         int rem, i;
8557         struct net_device *dev = info->user_ptr[1];
8558         struct nlattr *tx_rates;
8559         struct ieee80211_supported_band *sband;
8560         u16 vht_tx_mcs_map;
8561
8562         if (!rdev->ops->set_bitrate_mask)
8563                 return -EOPNOTSUPP;
8564
8565         memset(&mask, 0, sizeof(mask));
8566         /* Default to all rates enabled */
8567         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8568                 sband = rdev->wiphy.bands[i];
8569
8570                 if (!sband)
8571                         continue;
8572
8573                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8574                 memcpy(mask.control[i].ht_mcs,
8575                        sband->ht_cap.mcs.rx_mask,
8576                        sizeof(mask.control[i].ht_mcs));
8577
8578                 if (!sband->vht_cap.vht_supported)
8579                         continue;
8580
8581                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8582                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8583         }
8584
8585         /* if no rates are given set it back to the defaults */
8586         if (!info->attrs[NL80211_ATTR_TX_RATES])
8587                 goto out;
8588
8589         /*
8590          * The nested attribute uses enum nl80211_band as the index. This maps
8591          * directly to the enum nl80211_band values used in cfg80211.
8592          */
8593         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8594         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8595                 enum nl80211_band band = nla_type(tx_rates);
8596                 int err;
8597
8598                 if (band < 0 || band >= NUM_NL80211_BANDS)
8599                         return -EINVAL;
8600                 sband = rdev->wiphy.bands[band];
8601                 if (sband == NULL)
8602                         return -EINVAL;
8603                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8604                                 nla_len(tx_rates), nl80211_txattr_policy);
8605                 if (err)
8606                         return err;
8607                 if (tb[NL80211_TXRATE_LEGACY]) {
8608                         mask.control[band].legacy = rateset_to_mask(
8609                                 sband,
8610                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8611                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8612                         if ((mask.control[band].legacy == 0) &&
8613                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8614                                 return -EINVAL;
8615                 }
8616                 if (tb[NL80211_TXRATE_HT]) {
8617                         if (!ht_rateset_to_mask(
8618                                         sband,
8619                                         nla_data(tb[NL80211_TXRATE_HT]),
8620                                         nla_len(tb[NL80211_TXRATE_HT]),
8621                                         mask.control[band].ht_mcs))
8622                                 return -EINVAL;
8623                 }
8624                 if (tb[NL80211_TXRATE_VHT]) {
8625                         if (!vht_set_mcs_mask(
8626                                         sband,
8627                                         nla_data(tb[NL80211_TXRATE_VHT]),
8628                                         mask.control[band].vht_mcs))
8629                                 return -EINVAL;
8630                 }
8631                 if (tb[NL80211_TXRATE_GI]) {
8632                         mask.control[band].gi =
8633                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8634                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8635                                 return -EINVAL;
8636                 }
8637
8638                 if (mask.control[band].legacy == 0) {
8639                         /* don't allow empty legacy rates if HT or VHT
8640                          * are not even supported.
8641                          */
8642                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8643                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8644                                 return -EINVAL;
8645
8646                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8647                                 if (mask.control[band].ht_mcs[i])
8648                                         goto out;
8649
8650                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8651                                 if (mask.control[band].vht_mcs[i])
8652                                         goto out;
8653
8654                         /* legacy and mcs rates may not be both empty */
8655                         return -EINVAL;
8656                 }
8657         }
8658
8659 out:
8660         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8661 }
8662
8663 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8664 {
8665         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8666         struct wireless_dev *wdev = info->user_ptr[1];
8667         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8668
8669         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8670                 return -EINVAL;
8671
8672         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8673                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8674
8675         switch (wdev->iftype) {
8676         case NL80211_IFTYPE_STATION:
8677         case NL80211_IFTYPE_ADHOC:
8678         case NL80211_IFTYPE_P2P_CLIENT:
8679         case NL80211_IFTYPE_AP:
8680         case NL80211_IFTYPE_AP_VLAN:
8681         case NL80211_IFTYPE_MESH_POINT:
8682         case NL80211_IFTYPE_P2P_GO:
8683         case NL80211_IFTYPE_P2P_DEVICE:
8684                 break;
8685         default:
8686                 return -EOPNOTSUPP;
8687         }
8688
8689         /* not much point in registering if we can't reply */
8690         if (!rdev->ops->mgmt_tx)
8691                 return -EOPNOTSUPP;
8692
8693         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8694                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8695                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8696 }
8697
8698 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8699 {
8700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8701         struct wireless_dev *wdev = info->user_ptr[1];
8702         struct cfg80211_chan_def chandef;
8703         int err;
8704         void *hdr = NULL;
8705         u64 cookie;
8706         struct sk_buff *msg = NULL;
8707         struct cfg80211_mgmt_tx_params params = {
8708                 .dont_wait_for_ack =
8709                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8710         };
8711
8712         if (!info->attrs[NL80211_ATTR_FRAME])
8713                 return -EINVAL;
8714
8715         if (!rdev->ops->mgmt_tx)
8716                 return -EOPNOTSUPP;
8717
8718         switch (wdev->iftype) {
8719         case NL80211_IFTYPE_P2P_DEVICE:
8720                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8721                         return -EINVAL;
8722         case NL80211_IFTYPE_STATION:
8723         case NL80211_IFTYPE_ADHOC:
8724         case NL80211_IFTYPE_P2P_CLIENT:
8725         case NL80211_IFTYPE_AP:
8726         case NL80211_IFTYPE_AP_VLAN:
8727         case NL80211_IFTYPE_MESH_POINT:
8728         case NL80211_IFTYPE_P2P_GO:
8729                 break;
8730         default:
8731                 return -EOPNOTSUPP;
8732         }
8733
8734         if (info->attrs[NL80211_ATTR_DURATION]) {
8735                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8736                         return -EINVAL;
8737                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8738
8739                 /*
8740                  * We should wait on the channel for at least a minimum amount
8741                  * of time (10ms) but no longer than the driver supports.
8742                  */
8743                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8744                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8745                         return -EINVAL;
8746
8747         }
8748
8749         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8750
8751         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8752                 return -EINVAL;
8753
8754         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8755
8756         /* get the channel if any has been specified, otherwise pass NULL to
8757          * the driver. The latter will use the current one
8758          */
8759         chandef.chan = NULL;
8760         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8761                 err = nl80211_parse_chandef(rdev, info, &chandef);
8762                 if (err)
8763                         return err;
8764         }
8765
8766         if (!chandef.chan && params.offchan)
8767                 return -EINVAL;
8768
8769         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8770         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8771
8772         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8773                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8774                 int i;
8775
8776                 if (len % sizeof(u16))
8777                         return -EINVAL;
8778
8779                 params.n_csa_offsets = len / sizeof(u16);
8780                 params.csa_offsets =
8781                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8782
8783                 /* check that all the offsets fit the frame */
8784                 for (i = 0; i < params.n_csa_offsets; i++) {
8785                         if (params.csa_offsets[i] >= params.len)
8786                                 return -EINVAL;
8787                 }
8788         }
8789
8790         if (!params.dont_wait_for_ack) {
8791                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8792                 if (!msg)
8793                         return -ENOMEM;
8794
8795                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8796                                      NL80211_CMD_FRAME);
8797                 if (!hdr) {
8798                         err = -ENOBUFS;
8799                         goto free_msg;
8800                 }
8801         }
8802
8803         params.chan = chandef.chan;
8804         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8805         if (err)
8806                 goto free_msg;
8807
8808         if (msg) {
8809                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8810                                       NL80211_ATTR_PAD))
8811                         goto nla_put_failure;
8812
8813                 genlmsg_end(msg, hdr);
8814                 return genlmsg_reply(msg, info);
8815         }
8816
8817         return 0;
8818
8819  nla_put_failure:
8820         err = -ENOBUFS;
8821  free_msg:
8822         nlmsg_free(msg);
8823         return err;
8824 }
8825
8826 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8827 {
8828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8829         struct wireless_dev *wdev = info->user_ptr[1];
8830         u64 cookie;
8831
8832         if (!info->attrs[NL80211_ATTR_COOKIE])
8833                 return -EINVAL;
8834
8835         if (!rdev->ops->mgmt_tx_cancel_wait)
8836                 return -EOPNOTSUPP;
8837
8838         switch (wdev->iftype) {
8839         case NL80211_IFTYPE_STATION:
8840         case NL80211_IFTYPE_ADHOC:
8841         case NL80211_IFTYPE_P2P_CLIENT:
8842         case NL80211_IFTYPE_AP:
8843         case NL80211_IFTYPE_AP_VLAN:
8844         case NL80211_IFTYPE_P2P_GO:
8845         case NL80211_IFTYPE_P2P_DEVICE:
8846                 break;
8847         default:
8848                 return -EOPNOTSUPP;
8849         }
8850
8851         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8852
8853         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8854 }
8855
8856 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8857 {
8858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8859         struct wireless_dev *wdev;
8860         struct net_device *dev = info->user_ptr[1];
8861         u8 ps_state;
8862         bool state;
8863         int err;
8864
8865         if (!info->attrs[NL80211_ATTR_PS_STATE])
8866                 return -EINVAL;
8867
8868         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8869
8870         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8871                 return -EINVAL;
8872
8873         wdev = dev->ieee80211_ptr;
8874
8875         if (!rdev->ops->set_power_mgmt)
8876                 return -EOPNOTSUPP;
8877
8878         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8879
8880         if (state == wdev->ps)
8881                 return 0;
8882
8883         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8884         if (!err)
8885                 wdev->ps = state;
8886         return err;
8887 }
8888
8889 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8890 {
8891         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8892         enum nl80211_ps_state ps_state;
8893         struct wireless_dev *wdev;
8894         struct net_device *dev = info->user_ptr[1];
8895         struct sk_buff *msg;
8896         void *hdr;
8897         int err;
8898
8899         wdev = dev->ieee80211_ptr;
8900
8901         if (!rdev->ops->set_power_mgmt)
8902                 return -EOPNOTSUPP;
8903
8904         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8905         if (!msg)
8906                 return -ENOMEM;
8907
8908         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8909                              NL80211_CMD_GET_POWER_SAVE);
8910         if (!hdr) {
8911                 err = -ENOBUFS;
8912                 goto free_msg;
8913         }
8914
8915         if (wdev->ps)
8916                 ps_state = NL80211_PS_ENABLED;
8917         else
8918                 ps_state = NL80211_PS_DISABLED;
8919
8920         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8921                 goto nla_put_failure;
8922
8923         genlmsg_end(msg, hdr);
8924         return genlmsg_reply(msg, info);
8925
8926  nla_put_failure:
8927         err = -ENOBUFS;
8928  free_msg:
8929         nlmsg_free(msg);
8930         return err;
8931 }
8932
8933 static const struct nla_policy
8934 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8935         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8936         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8937         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8938         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8939         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8940         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8941 };
8942
8943 static int nl80211_set_cqm_txe(struct genl_info *info,
8944                                u32 rate, u32 pkts, u32 intvl)
8945 {
8946         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8947         struct net_device *dev = info->user_ptr[1];
8948         struct wireless_dev *wdev = dev->ieee80211_ptr;
8949
8950         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8951                 return -EINVAL;
8952
8953         if (!rdev->ops->set_cqm_txe_config)
8954                 return -EOPNOTSUPP;
8955
8956         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8957             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8958                 return -EOPNOTSUPP;
8959
8960         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8961 }
8962
8963 static int nl80211_set_cqm_rssi(struct genl_info *info,
8964                                 s32 threshold, u32 hysteresis)
8965 {
8966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8967         struct net_device *dev = info->user_ptr[1];
8968         struct wireless_dev *wdev = dev->ieee80211_ptr;
8969
8970         if (threshold > 0)
8971                 return -EINVAL;
8972
8973         /* disabling - hysteresis should also be zero then */
8974         if (threshold == 0)
8975                 hysteresis = 0;
8976
8977         if (!rdev->ops->set_cqm_rssi_config)
8978                 return -EOPNOTSUPP;
8979
8980         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8981             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8982                 return -EOPNOTSUPP;
8983
8984         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8985 }
8986
8987 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8988 {
8989         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8990         struct nlattr *cqm;
8991         int err;
8992
8993         cqm = info->attrs[NL80211_ATTR_CQM];
8994         if (!cqm)
8995                 return -EINVAL;
8996
8997         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8998                                nl80211_attr_cqm_policy);
8999         if (err)
9000                 return err;
9001
9002         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9003             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9004                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9005                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9006
9007                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9008         }
9009
9010         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9011             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9012             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9013                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9014                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9015                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9016
9017                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9018         }
9019
9020         return -EINVAL;
9021 }
9022
9023 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9024 {
9025         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9026         struct net_device *dev = info->user_ptr[1];
9027         struct ocb_setup setup = {};
9028         int err;
9029
9030         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9031         if (err)
9032                 return err;
9033
9034         return cfg80211_join_ocb(rdev, dev, &setup);
9035 }
9036
9037 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9038 {
9039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9040         struct net_device *dev = info->user_ptr[1];
9041
9042         return cfg80211_leave_ocb(rdev, dev);
9043 }
9044
9045 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9046 {
9047         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9048         struct net_device *dev = info->user_ptr[1];
9049         struct mesh_config cfg;
9050         struct mesh_setup setup;
9051         int err;
9052
9053         /* start with default */
9054         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9055         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9056
9057         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9058                 /* and parse parameters if given */
9059                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9060                 if (err)
9061                         return err;
9062         }
9063
9064         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9065             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9066                 return -EINVAL;
9067
9068         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9069         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9070
9071         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9072             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9073                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9074                         return -EINVAL;
9075
9076         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9077                 setup.beacon_interval =
9078                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9079                 if (setup.beacon_interval < 10 ||
9080                     setup.beacon_interval > 10000)
9081                         return -EINVAL;
9082         }
9083
9084         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9085                 setup.dtim_period =
9086                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9087                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9088                         return -EINVAL;
9089         }
9090
9091         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9092                 /* parse additional setup parameters if given */
9093                 err = nl80211_parse_mesh_setup(info, &setup);
9094                 if (err)
9095                         return err;
9096         }
9097
9098         if (setup.user_mpm)
9099                 cfg.auto_open_plinks = false;
9100
9101         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9102                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9103                 if (err)
9104                         return err;
9105         } else {
9106                 /* cfg80211_join_mesh() will sort it out */
9107                 setup.chandef.chan = NULL;
9108         }
9109
9110         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9111                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9112                 int n_rates =
9113                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9114                 struct ieee80211_supported_band *sband;
9115
9116                 if (!setup.chandef.chan)
9117                         return -EINVAL;
9118
9119                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9120
9121                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9122                                              &setup.basic_rates);
9123                 if (err)
9124                         return err;
9125         }
9126
9127         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9128 }
9129
9130 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9131 {
9132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9133         struct net_device *dev = info->user_ptr[1];
9134
9135         return cfg80211_leave_mesh(rdev, dev);
9136 }
9137
9138 #ifdef CONFIG_PM
9139 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9140                                         struct cfg80211_registered_device *rdev)
9141 {
9142         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9143         struct nlattr *nl_pats, *nl_pat;
9144         int i, pat_len;
9145
9146         if (!wowlan->n_patterns)
9147                 return 0;
9148
9149         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9150         if (!nl_pats)
9151                 return -ENOBUFS;
9152
9153         for (i = 0; i < wowlan->n_patterns; i++) {
9154                 nl_pat = nla_nest_start(msg, i + 1);
9155                 if (!nl_pat)
9156                         return -ENOBUFS;
9157                 pat_len = wowlan->patterns[i].pattern_len;
9158                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9159                             wowlan->patterns[i].mask) ||
9160                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9161                             wowlan->patterns[i].pattern) ||
9162                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9163                                 wowlan->patterns[i].pkt_offset))
9164                         return -ENOBUFS;
9165                 nla_nest_end(msg, nl_pat);
9166         }
9167         nla_nest_end(msg, nl_pats);
9168
9169         return 0;
9170 }
9171
9172 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9173                                    struct cfg80211_wowlan_tcp *tcp)
9174 {
9175         struct nlattr *nl_tcp;
9176
9177         if (!tcp)
9178                 return 0;
9179
9180         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9181         if (!nl_tcp)
9182                 return -ENOBUFS;
9183
9184         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9185             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9186             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9187             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9188             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9189             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9190                     tcp->payload_len, tcp->payload) ||
9191             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9192                         tcp->data_interval) ||
9193             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9194                     tcp->wake_len, tcp->wake_data) ||
9195             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9196                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9197                 return -ENOBUFS;
9198
9199         if (tcp->payload_seq.len &&
9200             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9201                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9202                 return -ENOBUFS;
9203
9204         if (tcp->payload_tok.len &&
9205             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9206                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9207                     &tcp->payload_tok))
9208                 return -ENOBUFS;
9209
9210         nla_nest_end(msg, nl_tcp);
9211
9212         return 0;
9213 }
9214
9215 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9216                                   struct cfg80211_sched_scan_request *req)
9217 {
9218         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9219         int i;
9220
9221         if (!req)
9222                 return 0;
9223
9224         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9225         if (!nd)
9226                 return -ENOBUFS;
9227
9228         if (req->n_scan_plans == 1 &&
9229             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9230                         req->scan_plans[0].interval * 1000))
9231                 return -ENOBUFS;
9232
9233         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9234                 return -ENOBUFS;
9235
9236         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9237         if (!freqs)
9238                 return -ENOBUFS;
9239
9240         for (i = 0; i < req->n_channels; i++)
9241                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9242
9243         nla_nest_end(msg, freqs);
9244
9245         if (req->n_match_sets) {
9246                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9247                 for (i = 0; i < req->n_match_sets; i++) {
9248                         match = nla_nest_start(msg, i);
9249                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9250                                 req->match_sets[i].ssid.ssid_len,
9251                                 req->match_sets[i].ssid.ssid);
9252                         nla_nest_end(msg, match);
9253                 }
9254                 nla_nest_end(msg, matches);
9255         }
9256
9257         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9258         if (!scan_plans)
9259                 return -ENOBUFS;
9260
9261         for (i = 0; i < req->n_scan_plans; i++) {
9262                 scan_plan = nla_nest_start(msg, i + 1);
9263                 if (!scan_plan ||
9264                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9265                                 req->scan_plans[i].interval) ||
9266                     (req->scan_plans[i].iterations &&
9267                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9268                                  req->scan_plans[i].iterations)))
9269                         return -ENOBUFS;
9270                 nla_nest_end(msg, scan_plan);
9271         }
9272         nla_nest_end(msg, scan_plans);
9273
9274         nla_nest_end(msg, nd);
9275
9276         return 0;
9277 }
9278
9279 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9280 {
9281         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9282         struct sk_buff *msg;
9283         void *hdr;
9284         u32 size = NLMSG_DEFAULT_SIZE;
9285
9286         if (!rdev->wiphy.wowlan)
9287                 return -EOPNOTSUPP;
9288
9289         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9290                 /* adjust size to have room for all the data */
9291                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9292                         rdev->wiphy.wowlan_config->tcp->payload_len +
9293                         rdev->wiphy.wowlan_config->tcp->wake_len +
9294                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9295         }
9296
9297         msg = nlmsg_new(size, GFP_KERNEL);
9298         if (!msg)
9299                 return -ENOMEM;
9300
9301         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9302                              NL80211_CMD_GET_WOWLAN);
9303         if (!hdr)
9304                 goto nla_put_failure;
9305
9306         if (rdev->wiphy.wowlan_config) {
9307                 struct nlattr *nl_wowlan;
9308
9309                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9310                 if (!nl_wowlan)
9311                         goto nla_put_failure;
9312
9313                 if ((rdev->wiphy.wowlan_config->any &&
9314                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9315                     (rdev->wiphy.wowlan_config->disconnect &&
9316                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9317                     (rdev->wiphy.wowlan_config->magic_pkt &&
9318                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9319                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9320                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9321                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9322                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9323                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9324                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9325                     (rdev->wiphy.wowlan_config->rfkill_release &&
9326                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9327                         goto nla_put_failure;
9328
9329                 if (nl80211_send_wowlan_patterns(msg, rdev))
9330                         goto nla_put_failure;
9331
9332                 if (nl80211_send_wowlan_tcp(msg,
9333                                             rdev->wiphy.wowlan_config->tcp))
9334                         goto nla_put_failure;
9335
9336                 if (nl80211_send_wowlan_nd(
9337                             msg,
9338                             rdev->wiphy.wowlan_config->nd_config))
9339                         goto nla_put_failure;
9340
9341                 nla_nest_end(msg, nl_wowlan);
9342         }
9343
9344         genlmsg_end(msg, hdr);
9345         return genlmsg_reply(msg, info);
9346
9347 nla_put_failure:
9348         nlmsg_free(msg);
9349         return -ENOBUFS;
9350 }
9351
9352 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9353                                     struct nlattr *attr,
9354                                     struct cfg80211_wowlan *trig)
9355 {
9356         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9357         struct cfg80211_wowlan_tcp *cfg;
9358         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9359         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9360         u32 size;
9361         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9362         int err, port;
9363
9364         if (!rdev->wiphy.wowlan->tcp)
9365                 return -EINVAL;
9366
9367         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9368                         nla_data(attr), nla_len(attr),
9369                         nl80211_wowlan_tcp_policy);
9370         if (err)
9371                 return err;
9372
9373         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9374             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9375             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9376             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9377             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9378             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9379             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9380             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9381                 return -EINVAL;
9382
9383         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9384         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9385                 return -EINVAL;
9386
9387         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9388                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9389             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9390                 return -EINVAL;
9391
9392         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9393         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9394                 return -EINVAL;
9395
9396         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9397         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9398                 return -EINVAL;
9399
9400         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9401                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9402
9403                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9404                 tokens_size = tokln - sizeof(*tok);
9405
9406                 if (!tok->len || tokens_size % tok->len)
9407                         return -EINVAL;
9408                 if (!rdev->wiphy.wowlan->tcp->tok)
9409                         return -EINVAL;
9410                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9411                         return -EINVAL;
9412                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9413                         return -EINVAL;
9414                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9415                         return -EINVAL;
9416                 if (tok->offset + tok->len > data_size)
9417                         return -EINVAL;
9418         }
9419
9420         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9421                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9422                 if (!rdev->wiphy.wowlan->tcp->seq)
9423                         return -EINVAL;
9424                 if (seq->len == 0 || seq->len > 4)
9425                         return -EINVAL;
9426                 if (seq->len + seq->offset > data_size)
9427                         return -EINVAL;
9428         }
9429
9430         size = sizeof(*cfg);
9431         size += data_size;
9432         size += wake_size + wake_mask_size;
9433         size += tokens_size;
9434
9435         cfg = kzalloc(size, GFP_KERNEL);
9436         if (!cfg)
9437                 return -ENOMEM;
9438         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9439         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9440         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9441                ETH_ALEN);
9442         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9443                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9444         else
9445                 port = 0;
9446 #ifdef CONFIG_INET
9447         /* allocate a socket and port for it and use it */
9448         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9449                             IPPROTO_TCP, &cfg->sock, 1);
9450         if (err) {
9451                 kfree(cfg);
9452                 return err;
9453         }
9454         if (inet_csk_get_port(cfg->sock->sk, port)) {
9455                 sock_release(cfg->sock);
9456                 kfree(cfg);
9457                 return -EADDRINUSE;
9458         }
9459         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9460 #else
9461         if (!port) {
9462                 kfree(cfg);
9463                 return -EINVAL;
9464         }
9465         cfg->src_port = port;
9466 #endif
9467
9468         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9469         cfg->payload_len = data_size;
9470         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9471         memcpy((void *)cfg->payload,
9472                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9473                data_size);
9474         if (seq)
9475                 cfg->payload_seq = *seq;
9476         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9477         cfg->wake_len = wake_size;
9478         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9479         memcpy((void *)cfg->wake_data,
9480                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9481                wake_size);
9482         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9483                          data_size + wake_size;
9484         memcpy((void *)cfg->wake_mask,
9485                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9486                wake_mask_size);
9487         if (tok) {
9488                 cfg->tokens_size = tokens_size;
9489                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9490         }
9491
9492         trig->tcp = cfg;
9493
9494         return 0;
9495 }
9496
9497 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9498                                    const struct wiphy_wowlan_support *wowlan,
9499                                    struct nlattr *attr,
9500                                    struct cfg80211_wowlan *trig)
9501 {
9502         struct nlattr **tb;
9503         int err;
9504
9505         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9506         if (!tb)
9507                 return -ENOMEM;
9508
9509         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9510                 err = -EOPNOTSUPP;
9511                 goto out;
9512         }
9513
9514         err = nla_parse(tb, NL80211_ATTR_MAX,
9515                         nla_data(attr), nla_len(attr),
9516                         nl80211_policy);
9517         if (err)
9518                 goto out;
9519
9520         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9521         err = PTR_ERR_OR_ZERO(trig->nd_config);
9522         if (err)
9523                 trig->nd_config = NULL;
9524
9525 out:
9526         kfree(tb);
9527         return err;
9528 }
9529
9530 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9531 {
9532         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9533         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9534         struct cfg80211_wowlan new_triggers = {};
9535         struct cfg80211_wowlan *ntrig;
9536         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9537         int err, i;
9538         bool prev_enabled = rdev->wiphy.wowlan_config;
9539         bool regular = false;
9540
9541         if (!wowlan)
9542                 return -EOPNOTSUPP;
9543
9544         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9545                 cfg80211_rdev_free_wowlan(rdev);
9546                 rdev->wiphy.wowlan_config = NULL;
9547                 goto set_wakeup;
9548         }
9549
9550         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9551                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9552                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9553                         nl80211_wowlan_policy);
9554         if (err)
9555                 return err;
9556
9557         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9558                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9559                         return -EINVAL;
9560                 new_triggers.any = true;
9561         }
9562
9563         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9564                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9565                         return -EINVAL;
9566                 new_triggers.disconnect = true;
9567                 regular = true;
9568         }
9569
9570         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9571                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9572                         return -EINVAL;
9573                 new_triggers.magic_pkt = true;
9574                 regular = true;
9575         }
9576
9577         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9578                 return -EINVAL;
9579
9580         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9581                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9582                         return -EINVAL;
9583                 new_triggers.gtk_rekey_failure = true;
9584                 regular = true;
9585         }
9586
9587         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9588                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9589                         return -EINVAL;
9590                 new_triggers.eap_identity_req = true;
9591                 regular = true;
9592         }
9593
9594         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9595                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9596                         return -EINVAL;
9597                 new_triggers.four_way_handshake = true;
9598                 regular = true;
9599         }
9600
9601         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9602                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9603                         return -EINVAL;
9604                 new_triggers.rfkill_release = true;
9605                 regular = true;
9606         }
9607
9608         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9609                 struct nlattr *pat;
9610                 int n_patterns = 0;
9611                 int rem, pat_len, mask_len, pkt_offset;
9612                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9613
9614                 regular = true;
9615
9616                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9617                                     rem)
9618                         n_patterns++;
9619                 if (n_patterns > wowlan->n_patterns)
9620                         return -EINVAL;
9621
9622                 new_triggers.patterns = kcalloc(n_patterns,
9623                                                 sizeof(new_triggers.patterns[0]),
9624                                                 GFP_KERNEL);
9625                 if (!new_triggers.patterns)
9626                         return -ENOMEM;
9627
9628                 new_triggers.n_patterns = n_patterns;
9629                 i = 0;
9630
9631                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9632                                     rem) {
9633                         u8 *mask_pat;
9634
9635                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9636                                   nla_len(pat), NULL);
9637                         err = -EINVAL;
9638                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9639                             !pat_tb[NL80211_PKTPAT_PATTERN])
9640                                 goto error;
9641                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9642                         mask_len = DIV_ROUND_UP(pat_len, 8);
9643                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9644                                 goto error;
9645                         if (pat_len > wowlan->pattern_max_len ||
9646                             pat_len < wowlan->pattern_min_len)
9647                                 goto error;
9648
9649                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9650                                 pkt_offset = 0;
9651                         else
9652                                 pkt_offset = nla_get_u32(
9653                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9654                         if (pkt_offset > wowlan->max_pkt_offset)
9655                                 goto error;
9656                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9657
9658                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9659                         if (!mask_pat) {
9660                                 err = -ENOMEM;
9661                                 goto error;
9662                         }
9663                         new_triggers.patterns[i].mask = mask_pat;
9664                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9665                                mask_len);
9666                         mask_pat += mask_len;
9667                         new_triggers.patterns[i].pattern = mask_pat;
9668                         new_triggers.patterns[i].pattern_len = pat_len;
9669                         memcpy(mask_pat,
9670                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9671                                pat_len);
9672                         i++;
9673                 }
9674         }
9675
9676         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9677                 regular = true;
9678                 err = nl80211_parse_wowlan_tcp(
9679                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9680                         &new_triggers);
9681                 if (err)
9682                         goto error;
9683         }
9684
9685         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9686                 regular = true;
9687                 err = nl80211_parse_wowlan_nd(
9688                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9689                         &new_triggers);
9690                 if (err)
9691                         goto error;
9692         }
9693
9694         /* The 'any' trigger means the device continues operating more or less
9695          * as in its normal operation mode and wakes up the host on most of the
9696          * normal interrupts (like packet RX, ...)
9697          * It therefore makes little sense to combine with the more constrained
9698          * wakeup trigger modes.
9699          */
9700         if (new_triggers.any && regular) {
9701                 err = -EINVAL;
9702                 goto error;
9703         }
9704
9705         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9706         if (!ntrig) {
9707                 err = -ENOMEM;
9708                 goto error;
9709         }
9710         cfg80211_rdev_free_wowlan(rdev);
9711         rdev->wiphy.wowlan_config = ntrig;
9712
9713  set_wakeup:
9714         if (rdev->ops->set_wakeup &&
9715             prev_enabled != !!rdev->wiphy.wowlan_config)
9716                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9717
9718         return 0;
9719  error:
9720         for (i = 0; i < new_triggers.n_patterns; i++)
9721                 kfree(new_triggers.patterns[i].mask);
9722         kfree(new_triggers.patterns);
9723         if (new_triggers.tcp && new_triggers.tcp->sock)
9724                 sock_release(new_triggers.tcp->sock);
9725         kfree(new_triggers.tcp);
9726         kfree(new_triggers.nd_config);
9727         return err;
9728 }
9729 #endif
9730
9731 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9732                                        struct cfg80211_registered_device *rdev)
9733 {
9734         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9735         int i, j, pat_len;
9736         struct cfg80211_coalesce_rules *rule;
9737
9738         if (!rdev->coalesce->n_rules)
9739                 return 0;
9740
9741         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9742         if (!nl_rules)
9743                 return -ENOBUFS;
9744
9745         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9746                 nl_rule = nla_nest_start(msg, i + 1);
9747                 if (!nl_rule)
9748                         return -ENOBUFS;
9749
9750                 rule = &rdev->coalesce->rules[i];
9751                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9752                                 rule->delay))
9753                         return -ENOBUFS;
9754
9755                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9756                                 rule->condition))
9757                         return -ENOBUFS;
9758
9759                 nl_pats = nla_nest_start(msg,
9760                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9761                 if (!nl_pats)
9762                         return -ENOBUFS;
9763
9764                 for (j = 0; j < rule->n_patterns; j++) {
9765                         nl_pat = nla_nest_start(msg, j + 1);
9766                         if (!nl_pat)
9767                                 return -ENOBUFS;
9768                         pat_len = rule->patterns[j].pattern_len;
9769                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9770                                     DIV_ROUND_UP(pat_len, 8),
9771                                     rule->patterns[j].mask) ||
9772                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9773                                     rule->patterns[j].pattern) ||
9774                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9775                                         rule->patterns[j].pkt_offset))
9776                                 return -ENOBUFS;
9777                         nla_nest_end(msg, nl_pat);
9778                 }
9779                 nla_nest_end(msg, nl_pats);
9780                 nla_nest_end(msg, nl_rule);
9781         }
9782         nla_nest_end(msg, nl_rules);
9783
9784         return 0;
9785 }
9786
9787 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9788 {
9789         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9790         struct sk_buff *msg;
9791         void *hdr;
9792
9793         if (!rdev->wiphy.coalesce)
9794                 return -EOPNOTSUPP;
9795
9796         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9797         if (!msg)
9798                 return -ENOMEM;
9799
9800         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9801                              NL80211_CMD_GET_COALESCE);
9802         if (!hdr)
9803                 goto nla_put_failure;
9804
9805         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9806                 goto nla_put_failure;
9807
9808         genlmsg_end(msg, hdr);
9809         return genlmsg_reply(msg, info);
9810
9811 nla_put_failure:
9812         nlmsg_free(msg);
9813         return -ENOBUFS;
9814 }
9815
9816 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9817 {
9818         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9819         int i, j;
9820         struct cfg80211_coalesce_rules *rule;
9821
9822         if (!coalesce)
9823                 return;
9824
9825         for (i = 0; i < coalesce->n_rules; i++) {
9826                 rule = &coalesce->rules[i];
9827                 for (j = 0; j < rule->n_patterns; j++)
9828                         kfree(rule->patterns[j].mask);
9829                 kfree(rule->patterns);
9830         }
9831         kfree(coalesce->rules);
9832         kfree(coalesce);
9833         rdev->coalesce = NULL;
9834 }
9835
9836 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9837                                        struct nlattr *rule,
9838                                        struct cfg80211_coalesce_rules *new_rule)
9839 {
9840         int err, i;
9841         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9842         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9843         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9844         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9845
9846         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9847                         nla_len(rule), nl80211_coalesce_policy);
9848         if (err)
9849                 return err;
9850
9851         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9852                 new_rule->delay =
9853                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9854         if (new_rule->delay > coalesce->max_delay)
9855                 return -EINVAL;
9856
9857         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9858                 new_rule->condition =
9859                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9860         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9861             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9862                 return -EINVAL;
9863
9864         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9865                 return -EINVAL;
9866
9867         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9868                             rem)
9869                 n_patterns++;
9870         if (n_patterns > coalesce->n_patterns)
9871                 return -EINVAL;
9872
9873         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9874                                      GFP_KERNEL);
9875         if (!new_rule->patterns)
9876                 return -ENOMEM;
9877
9878         new_rule->n_patterns = n_patterns;
9879         i = 0;
9880
9881         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9882                             rem) {
9883                 u8 *mask_pat;
9884
9885                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9886                           nla_len(pat), NULL);
9887                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9888                     !pat_tb[NL80211_PKTPAT_PATTERN])
9889                         return -EINVAL;
9890                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9891                 mask_len = DIV_ROUND_UP(pat_len, 8);
9892                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9893                         return -EINVAL;
9894                 if (pat_len > coalesce->pattern_max_len ||
9895                     pat_len < coalesce->pattern_min_len)
9896                         return -EINVAL;
9897
9898                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9899                         pkt_offset = 0;
9900                 else
9901                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9902                 if (pkt_offset > coalesce->max_pkt_offset)
9903                         return -EINVAL;
9904                 new_rule->patterns[i].pkt_offset = pkt_offset;
9905
9906                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9907                 if (!mask_pat)
9908                         return -ENOMEM;
9909
9910                 new_rule->patterns[i].mask = mask_pat;
9911                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9912                        mask_len);
9913
9914                 mask_pat += mask_len;
9915                 new_rule->patterns[i].pattern = mask_pat;
9916                 new_rule->patterns[i].pattern_len = pat_len;
9917                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9918                        pat_len);
9919                 i++;
9920         }
9921
9922         return 0;
9923 }
9924
9925 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9926 {
9927         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9928         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9929         struct cfg80211_coalesce new_coalesce = {};
9930         struct cfg80211_coalesce *n_coalesce;
9931         int err, rem_rule, n_rules = 0, i, j;
9932         struct nlattr *rule;
9933         struct cfg80211_coalesce_rules *tmp_rule;
9934
9935         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9936                 return -EOPNOTSUPP;
9937
9938         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9939                 cfg80211_rdev_free_coalesce(rdev);
9940                 rdev_set_coalesce(rdev, NULL);
9941                 return 0;
9942         }
9943
9944         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9945                             rem_rule)
9946                 n_rules++;
9947         if (n_rules > coalesce->n_rules)
9948                 return -EINVAL;
9949
9950         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9951                                      GFP_KERNEL);
9952         if (!new_coalesce.rules)
9953                 return -ENOMEM;
9954
9955         new_coalesce.n_rules = n_rules;
9956         i = 0;
9957
9958         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9959                             rem_rule) {
9960                 err = nl80211_parse_coalesce_rule(rdev, rule,
9961                                                   &new_coalesce.rules[i]);
9962                 if (err)
9963                         goto error;
9964
9965                 i++;
9966         }
9967
9968         err = rdev_set_coalesce(rdev, &new_coalesce);
9969         if (err)
9970                 goto error;
9971
9972         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9973         if (!n_coalesce) {
9974                 err = -ENOMEM;
9975                 goto error;
9976         }
9977         cfg80211_rdev_free_coalesce(rdev);
9978         rdev->coalesce = n_coalesce;
9979
9980         return 0;
9981 error:
9982         for (i = 0; i < new_coalesce.n_rules; i++) {
9983                 tmp_rule = &new_coalesce.rules[i];
9984                 for (j = 0; j < tmp_rule->n_patterns; j++)
9985                         kfree(tmp_rule->patterns[j].mask);
9986                 kfree(tmp_rule->patterns);
9987         }
9988         kfree(new_coalesce.rules);
9989
9990         return err;
9991 }
9992
9993 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9994 {
9995         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9996         struct net_device *dev = info->user_ptr[1];
9997         struct wireless_dev *wdev = dev->ieee80211_ptr;
9998         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9999         struct cfg80211_gtk_rekey_data rekey_data;
10000         int err;
10001
10002         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10003                 return -EINVAL;
10004
10005         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10006                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10007                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10008                         nl80211_rekey_policy);
10009         if (err)
10010                 return err;
10011
10012         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10013                 return -ERANGE;
10014         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10015                 return -ERANGE;
10016         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10017                 return -ERANGE;
10018
10019         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10020         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10021         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10022
10023         wdev_lock(wdev);
10024         if (!wdev->current_bss) {
10025                 err = -ENOTCONN;
10026                 goto out;
10027         }
10028
10029         if (!rdev->ops->set_rekey_data) {
10030                 err = -EOPNOTSUPP;
10031                 goto out;
10032         }
10033
10034         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10035  out:
10036         wdev_unlock(wdev);
10037         return err;
10038 }
10039
10040 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10041                                              struct genl_info *info)
10042 {
10043         struct net_device *dev = info->user_ptr[1];
10044         struct wireless_dev *wdev = dev->ieee80211_ptr;
10045
10046         if (wdev->iftype != NL80211_IFTYPE_AP &&
10047             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10048                 return -EINVAL;
10049
10050         if (wdev->ap_unexpected_nlportid)
10051                 return -EBUSY;
10052
10053         wdev->ap_unexpected_nlportid = info->snd_portid;
10054         return 0;
10055 }
10056
10057 static int nl80211_probe_client(struct sk_buff *skb,
10058                                 struct genl_info *info)
10059 {
10060         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10061         struct net_device *dev = info->user_ptr[1];
10062         struct wireless_dev *wdev = dev->ieee80211_ptr;
10063         struct sk_buff *msg;
10064         void *hdr;
10065         const u8 *addr;
10066         u64 cookie;
10067         int err;
10068
10069         if (wdev->iftype != NL80211_IFTYPE_AP &&
10070             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10071                 return -EOPNOTSUPP;
10072
10073         if (!info->attrs[NL80211_ATTR_MAC])
10074                 return -EINVAL;
10075
10076         if (!rdev->ops->probe_client)
10077                 return -EOPNOTSUPP;
10078
10079         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10080         if (!msg)
10081                 return -ENOMEM;
10082
10083         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10084                              NL80211_CMD_PROBE_CLIENT);
10085         if (!hdr) {
10086                 err = -ENOBUFS;
10087                 goto free_msg;
10088         }
10089
10090         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10091
10092         err = rdev_probe_client(rdev, dev, addr, &cookie);
10093         if (err)
10094                 goto free_msg;
10095
10096         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10097                               NL80211_ATTR_PAD))
10098                 goto nla_put_failure;
10099
10100         genlmsg_end(msg, hdr);
10101
10102         return genlmsg_reply(msg, info);
10103
10104  nla_put_failure:
10105         err = -ENOBUFS;
10106  free_msg:
10107         nlmsg_free(msg);
10108         return err;
10109 }
10110
10111 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10112 {
10113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10114         struct cfg80211_beacon_registration *reg, *nreg;
10115         int rv;
10116
10117         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10118                 return -EOPNOTSUPP;
10119
10120         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10121         if (!nreg)
10122                 return -ENOMEM;
10123
10124         /* First, check if already registered. */
10125         spin_lock_bh(&rdev->beacon_registrations_lock);
10126         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10127                 if (reg->nlportid == info->snd_portid) {
10128                         rv = -EALREADY;
10129                         goto out_err;
10130                 }
10131         }
10132         /* Add it to the list */
10133         nreg->nlportid = info->snd_portid;
10134         list_add(&nreg->list, &rdev->beacon_registrations);
10135
10136         spin_unlock_bh(&rdev->beacon_registrations_lock);
10137
10138         return 0;
10139 out_err:
10140         spin_unlock_bh(&rdev->beacon_registrations_lock);
10141         kfree(nreg);
10142         return rv;
10143 }
10144
10145 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10146 {
10147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10148         struct wireless_dev *wdev = info->user_ptr[1];
10149         int err;
10150
10151         if (!rdev->ops->start_p2p_device)
10152                 return -EOPNOTSUPP;
10153
10154         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10155                 return -EOPNOTSUPP;
10156
10157         if (wdev->p2p_started)
10158                 return 0;
10159
10160         if (rfkill_blocked(rdev->rfkill))
10161                 return -ERFKILL;
10162
10163         err = rdev_start_p2p_device(rdev, wdev);
10164         if (err)
10165                 return err;
10166
10167         wdev->p2p_started = true;
10168         rdev->opencount++;
10169
10170         return 0;
10171 }
10172
10173 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10174 {
10175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10176         struct wireless_dev *wdev = info->user_ptr[1];
10177
10178         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10179                 return -EOPNOTSUPP;
10180
10181         if (!rdev->ops->stop_p2p_device)
10182                 return -EOPNOTSUPP;
10183
10184         cfg80211_stop_p2p_device(rdev, wdev);
10185
10186         return 0;
10187 }
10188
10189 static int nl80211_get_protocol_features(struct sk_buff *skb,
10190                                          struct genl_info *info)
10191 {
10192         void *hdr;
10193         struct sk_buff *msg;
10194
10195         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10196         if (!msg)
10197                 return -ENOMEM;
10198
10199         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10200                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10201         if (!hdr)
10202                 goto nla_put_failure;
10203
10204         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10205                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10206                 goto nla_put_failure;
10207
10208         genlmsg_end(msg, hdr);
10209         return genlmsg_reply(msg, info);
10210
10211  nla_put_failure:
10212         kfree_skb(msg);
10213         return -ENOBUFS;
10214 }
10215
10216 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10217 {
10218         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10219         struct cfg80211_update_ft_ies_params ft_params;
10220         struct net_device *dev = info->user_ptr[1];
10221
10222         if (!rdev->ops->update_ft_ies)
10223                 return -EOPNOTSUPP;
10224
10225         if (!info->attrs[NL80211_ATTR_MDID] ||
10226             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10227                 return -EINVAL;
10228
10229         memset(&ft_params, 0, sizeof(ft_params));
10230         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10231         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10232         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10233
10234         return rdev_update_ft_ies(rdev, dev, &ft_params);
10235 }
10236
10237 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10238                                        struct genl_info *info)
10239 {
10240         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10241         struct wireless_dev *wdev = info->user_ptr[1];
10242         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10243         u16 duration;
10244         int ret;
10245
10246         if (!rdev->ops->crit_proto_start)
10247                 return -EOPNOTSUPP;
10248
10249         if (WARN_ON(!rdev->ops->crit_proto_stop))
10250                 return -EINVAL;
10251
10252         if (rdev->crit_proto_nlportid)
10253                 return -EBUSY;
10254
10255         /* determine protocol if provided */
10256         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10257                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10258
10259         if (proto >= NUM_NL80211_CRIT_PROTO)
10260                 return -EINVAL;
10261
10262         /* timeout must be provided */
10263         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10264                 return -EINVAL;
10265
10266         duration =
10267                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10268
10269         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10270                 return -ERANGE;
10271
10272         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10273         if (!ret)
10274                 rdev->crit_proto_nlportid = info->snd_portid;
10275
10276         return ret;
10277 }
10278
10279 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10280                                       struct genl_info *info)
10281 {
10282         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10283         struct wireless_dev *wdev = info->user_ptr[1];
10284
10285         if (!rdev->ops->crit_proto_stop)
10286                 return -EOPNOTSUPP;
10287
10288         if (rdev->crit_proto_nlportid) {
10289                 rdev->crit_proto_nlportid = 0;
10290                 rdev_crit_proto_stop(rdev, wdev);
10291         }
10292         return 0;
10293 }
10294
10295 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10296 {
10297         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10298         struct wireless_dev *wdev =
10299                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10300         int i, err;
10301         u32 vid, subcmd;
10302
10303         if (!rdev->wiphy.vendor_commands)
10304                 return -EOPNOTSUPP;
10305
10306         if (IS_ERR(wdev)) {
10307                 err = PTR_ERR(wdev);
10308                 if (err != -EINVAL)
10309                         return err;
10310                 wdev = NULL;
10311         } else if (wdev->wiphy != &rdev->wiphy) {
10312                 return -EINVAL;
10313         }
10314
10315         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10316             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10317                 return -EINVAL;
10318
10319         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10320         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10321         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10322                 const struct wiphy_vendor_command *vcmd;
10323                 void *data = NULL;
10324                 int len = 0;
10325
10326                 vcmd = &rdev->wiphy.vendor_commands[i];
10327
10328                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10329                         continue;
10330
10331                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10332                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10333                         if (!wdev)
10334                                 return -EINVAL;
10335                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10336                             !wdev->netdev)
10337                                 return -EINVAL;
10338
10339                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10340                                 if (wdev->netdev &&
10341                                     !netif_running(wdev->netdev))
10342                                         return -ENETDOWN;
10343                                 if (!wdev->netdev && !wdev->p2p_started)
10344                                         return -ENETDOWN;
10345                         }
10346
10347                         if (!vcmd->doit)
10348                                 return -EOPNOTSUPP;
10349                 } else {
10350                         wdev = NULL;
10351                 }
10352
10353                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10354                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10355                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10356                 }
10357
10358                 rdev->cur_cmd_info = info;
10359                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10360                                                           data, len);
10361                 rdev->cur_cmd_info = NULL;
10362                 return err;
10363         }
10364
10365         return -EOPNOTSUPP;
10366 }
10367
10368 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10369                                        struct netlink_callback *cb,
10370                                        struct cfg80211_registered_device **rdev,
10371                                        struct wireless_dev **wdev)
10372 {
10373         u32 vid, subcmd;
10374         unsigned int i;
10375         int vcmd_idx = -1;
10376         int err;
10377         void *data = NULL;
10378         unsigned int data_len = 0;
10379
10380         rtnl_lock();
10381
10382         if (cb->args[0]) {
10383                 /* subtract the 1 again here */
10384                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10385                 struct wireless_dev *tmp;
10386
10387                 if (!wiphy) {
10388                         err = -ENODEV;
10389                         goto out_unlock;
10390                 }
10391                 *rdev = wiphy_to_rdev(wiphy);
10392                 *wdev = NULL;
10393
10394                 if (cb->args[1]) {
10395                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10396                                 if (tmp->identifier == cb->args[1] - 1) {
10397                                         *wdev = tmp;
10398                                         break;
10399                                 }
10400                         }
10401                 }
10402
10403                 /* keep rtnl locked in successful case */
10404                 return 0;
10405         }
10406
10407         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10408                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10409                           nl80211_policy);
10410         if (err)
10411                 goto out_unlock;
10412
10413         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10414             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10415                 err = -EINVAL;
10416                 goto out_unlock;
10417         }
10418
10419         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10420                                            nl80211_fam.attrbuf);
10421         if (IS_ERR(*wdev))
10422                 *wdev = NULL;
10423
10424         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10425                                            nl80211_fam.attrbuf);
10426         if (IS_ERR(*rdev)) {
10427                 err = PTR_ERR(*rdev);
10428                 goto out_unlock;
10429         }
10430
10431         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10432         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10433
10434         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10435                 const struct wiphy_vendor_command *vcmd;
10436
10437                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10438
10439                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10440                         continue;
10441
10442                 if (!vcmd->dumpit) {
10443                         err = -EOPNOTSUPP;
10444                         goto out_unlock;
10445                 }
10446
10447                 vcmd_idx = i;
10448                 break;
10449         }
10450
10451         if (vcmd_idx < 0) {
10452                 err = -EOPNOTSUPP;
10453                 goto out_unlock;
10454         }
10455
10456         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10457                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10458                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10459         }
10460
10461         /* 0 is the first index - add 1 to parse only once */
10462         cb->args[0] = (*rdev)->wiphy_idx + 1;
10463         /* add 1 to know if it was NULL */
10464         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10465         cb->args[2] = vcmd_idx;
10466         cb->args[3] = (unsigned long)data;
10467         cb->args[4] = data_len;
10468
10469         /* keep rtnl locked in successful case */
10470         return 0;
10471  out_unlock:
10472         rtnl_unlock();
10473         return err;
10474 }
10475
10476 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10477                                    struct netlink_callback *cb)
10478 {
10479         struct cfg80211_registered_device *rdev;
10480         struct wireless_dev *wdev;
10481         unsigned int vcmd_idx;
10482         const struct wiphy_vendor_command *vcmd;
10483         void *data;
10484         int data_len;
10485         int err;
10486         struct nlattr *vendor_data;
10487
10488         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10489         if (err)
10490                 return err;
10491
10492         vcmd_idx = cb->args[2];
10493         data = (void *)cb->args[3];
10494         data_len = cb->args[4];
10495         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10496
10497         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10498                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10499                 if (!wdev)
10500                         return -EINVAL;
10501                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10502                     !wdev->netdev)
10503                         return -EINVAL;
10504
10505                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10506                         if (wdev->netdev &&
10507                             !netif_running(wdev->netdev))
10508                                 return -ENETDOWN;
10509                         if (!wdev->netdev && !wdev->p2p_started)
10510                                 return -ENETDOWN;
10511                 }
10512         }
10513
10514         while (1) {
10515                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10516                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10517                                            NL80211_CMD_VENDOR);
10518                 if (!hdr)
10519                         break;
10520
10521                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10522                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10523                                                wdev_id(wdev),
10524                                                NL80211_ATTR_PAD))) {
10525                         genlmsg_cancel(skb, hdr);
10526                         break;
10527                 }
10528
10529                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10530                 if (!vendor_data) {
10531                         genlmsg_cancel(skb, hdr);
10532                         break;
10533                 }
10534
10535                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10536                                    (unsigned long *)&cb->args[5]);
10537                 nla_nest_end(skb, vendor_data);
10538
10539                 if (err == -ENOBUFS || err == -ENOENT) {
10540                         genlmsg_cancel(skb, hdr);
10541                         break;
10542                 } else if (err) {
10543                         genlmsg_cancel(skb, hdr);
10544                         goto out;
10545                 }
10546
10547                 genlmsg_end(skb, hdr);
10548         }
10549
10550         err = skb->len;
10551  out:
10552         rtnl_unlock();
10553         return err;
10554 }
10555
10556 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10557                                            enum nl80211_commands cmd,
10558                                            enum nl80211_attrs attr,
10559                                            int approxlen)
10560 {
10561         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10562
10563         if (WARN_ON(!rdev->cur_cmd_info))
10564                 return NULL;
10565
10566         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10567                                            rdev->cur_cmd_info->snd_portid,
10568                                            rdev->cur_cmd_info->snd_seq,
10569                                            cmd, attr, NULL, GFP_KERNEL);
10570 }
10571 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10572
10573 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10574 {
10575         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10576         void *hdr = ((void **)skb->cb)[1];
10577         struct nlattr *data = ((void **)skb->cb)[2];
10578
10579         /* clear CB data for netlink core to own from now on */
10580         memset(skb->cb, 0, sizeof(skb->cb));
10581
10582         if (WARN_ON(!rdev->cur_cmd_info)) {
10583                 kfree_skb(skb);
10584                 return -EINVAL;
10585         }
10586
10587         nla_nest_end(skb, data);
10588         genlmsg_end(skb, hdr);
10589         return genlmsg_reply(skb, rdev->cur_cmd_info);
10590 }
10591 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10592
10593
10594 static int nl80211_set_qos_map(struct sk_buff *skb,
10595                                struct genl_info *info)
10596 {
10597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10598         struct cfg80211_qos_map *qos_map = NULL;
10599         struct net_device *dev = info->user_ptr[1];
10600         u8 *pos, len, num_des, des_len, des;
10601         int ret;
10602
10603         if (!rdev->ops->set_qos_map)
10604                 return -EOPNOTSUPP;
10605
10606         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10607                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10608                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10609
10610                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10611                     len > IEEE80211_QOS_MAP_LEN_MAX)
10612                         return -EINVAL;
10613
10614                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10615                 if (!qos_map)
10616                         return -ENOMEM;
10617
10618                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10619                 if (num_des) {
10620                         des_len = num_des *
10621                                 sizeof(struct cfg80211_dscp_exception);
10622                         memcpy(qos_map->dscp_exception, pos, des_len);
10623                         qos_map->num_des = num_des;
10624                         for (des = 0; des < num_des; des++) {
10625                                 if (qos_map->dscp_exception[des].up > 7) {
10626                                         kfree(qos_map);
10627                                         return -EINVAL;
10628                                 }
10629                         }
10630                         pos += des_len;
10631                 }
10632                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10633         }
10634
10635         wdev_lock(dev->ieee80211_ptr);
10636         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10637         if (!ret)
10638                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10639         wdev_unlock(dev->ieee80211_ptr);
10640
10641         kfree(qos_map);
10642         return ret;
10643 }
10644
10645 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10646 {
10647         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10648         struct net_device *dev = info->user_ptr[1];
10649         struct wireless_dev *wdev = dev->ieee80211_ptr;
10650         const u8 *peer;
10651         u8 tsid, up;
10652         u16 admitted_time = 0;
10653         int err;
10654
10655         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10656                 return -EOPNOTSUPP;
10657
10658         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10659             !info->attrs[NL80211_ATTR_USER_PRIO])
10660                 return -EINVAL;
10661
10662         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10663         if (tsid >= IEEE80211_NUM_TIDS)
10664                 return -EINVAL;
10665
10666         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10667         if (up >= IEEE80211_NUM_UPS)
10668                 return -EINVAL;
10669
10670         /* WMM uses TIDs 0-7 even for TSPEC */
10671         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10672                 /* TODO: handle 802.11 TSPEC/admission control
10673                  * need more attributes for that (e.g. BA session requirement);
10674                  * change the WMM adminssion test above to allow both then
10675                  */
10676                 return -EINVAL;
10677         }
10678
10679         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10680
10681         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10682                 admitted_time =
10683                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10684                 if (!admitted_time)
10685                         return -EINVAL;
10686         }
10687
10688         wdev_lock(wdev);
10689         switch (wdev->iftype) {
10690         case NL80211_IFTYPE_STATION:
10691         case NL80211_IFTYPE_P2P_CLIENT:
10692                 if (wdev->current_bss)
10693                         break;
10694                 err = -ENOTCONN;
10695                 goto out;
10696         default:
10697                 err = -EOPNOTSUPP;
10698                 goto out;
10699         }
10700
10701         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10702
10703  out:
10704         wdev_unlock(wdev);
10705         return err;
10706 }
10707
10708 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10709 {
10710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10711         struct net_device *dev = info->user_ptr[1];
10712         struct wireless_dev *wdev = dev->ieee80211_ptr;
10713         const u8 *peer;
10714         u8 tsid;
10715         int err;
10716
10717         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10718                 return -EINVAL;
10719
10720         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10721         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10722
10723         wdev_lock(wdev);
10724         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10725         wdev_unlock(wdev);
10726
10727         return err;
10728 }
10729
10730 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10731                                        struct genl_info *info)
10732 {
10733         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10734         struct net_device *dev = info->user_ptr[1];
10735         struct wireless_dev *wdev = dev->ieee80211_ptr;
10736         struct cfg80211_chan_def chandef = {};
10737         const u8 *addr;
10738         u8 oper_class;
10739         int err;
10740
10741         if (!rdev->ops->tdls_channel_switch ||
10742             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10743                 return -EOPNOTSUPP;
10744
10745         switch (dev->ieee80211_ptr->iftype) {
10746         case NL80211_IFTYPE_STATION:
10747         case NL80211_IFTYPE_P2P_CLIENT:
10748                 break;
10749         default:
10750                 return -EOPNOTSUPP;
10751         }
10752
10753         if (!info->attrs[NL80211_ATTR_MAC] ||
10754             !info->attrs[NL80211_ATTR_OPER_CLASS])
10755                 return -EINVAL;
10756
10757         err = nl80211_parse_chandef(rdev, info, &chandef);
10758         if (err)
10759                 return err;
10760
10761         /*
10762          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10763          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10764          * specification is not defined for them.
10765          */
10766         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10767             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10768             chandef.width != NL80211_CHAN_WIDTH_20)
10769                 return -EINVAL;
10770
10771         /* we will be active on the TDLS link */
10772         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10773                                            wdev->iftype))
10774                 return -EINVAL;
10775
10776         /* don't allow switching to DFS channels */
10777         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10778                 return -EINVAL;
10779
10780         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10781         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10782
10783         wdev_lock(wdev);
10784         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10785         wdev_unlock(wdev);
10786
10787         return err;
10788 }
10789
10790 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10791                                               struct genl_info *info)
10792 {
10793         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10794         struct net_device *dev = info->user_ptr[1];
10795         struct wireless_dev *wdev = dev->ieee80211_ptr;
10796         const u8 *addr;
10797
10798         if (!rdev->ops->tdls_channel_switch ||
10799             !rdev->ops->tdls_cancel_channel_switch ||
10800             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10801                 return -EOPNOTSUPP;
10802
10803         switch (dev->ieee80211_ptr->iftype) {
10804         case NL80211_IFTYPE_STATION:
10805         case NL80211_IFTYPE_P2P_CLIENT:
10806                 break;
10807         default:
10808                 return -EOPNOTSUPP;
10809         }
10810
10811         if (!info->attrs[NL80211_ATTR_MAC])
10812                 return -EINVAL;
10813
10814         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10815
10816         wdev_lock(wdev);
10817         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10818         wdev_unlock(wdev);
10819
10820         return 0;
10821 }
10822
10823 #define NL80211_FLAG_NEED_WIPHY         0x01
10824 #define NL80211_FLAG_NEED_NETDEV        0x02
10825 #define NL80211_FLAG_NEED_RTNL          0x04
10826 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10827 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10828                                          NL80211_FLAG_CHECK_NETDEV_UP)
10829 #define NL80211_FLAG_NEED_WDEV          0x10
10830 /* If a netdev is associated, it must be UP, P2P must be started */
10831 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10832                                          NL80211_FLAG_CHECK_NETDEV_UP)
10833 #define NL80211_FLAG_CLEAR_SKB          0x20
10834
10835 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10836                             struct genl_info *info)
10837 {
10838         struct cfg80211_registered_device *rdev;
10839         struct wireless_dev *wdev;
10840         struct net_device *dev;
10841         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10842
10843         if (rtnl)
10844                 rtnl_lock();
10845
10846         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10847                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10848                 if (IS_ERR(rdev)) {
10849                         if (rtnl)
10850                                 rtnl_unlock();
10851                         return PTR_ERR(rdev);
10852                 }
10853                 info->user_ptr[0] = rdev;
10854         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10855                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10856                 ASSERT_RTNL();
10857
10858                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10859                                                   info->attrs);
10860                 if (IS_ERR(wdev)) {
10861                         if (rtnl)
10862                                 rtnl_unlock();
10863                         return PTR_ERR(wdev);
10864                 }
10865
10866                 dev = wdev->netdev;
10867                 rdev = wiphy_to_rdev(wdev->wiphy);
10868
10869                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10870                         if (!dev) {
10871                                 if (rtnl)
10872                                         rtnl_unlock();
10873                                 return -EINVAL;
10874                         }
10875
10876                         info->user_ptr[1] = dev;
10877                 } else {
10878                         info->user_ptr[1] = wdev;
10879                 }
10880
10881                 if (dev) {
10882                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10883                             !netif_running(dev)) {
10884                                 if (rtnl)
10885                                         rtnl_unlock();
10886                                 return -ENETDOWN;
10887                         }
10888
10889                         dev_hold(dev);
10890                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10891                         if (!wdev->p2p_started) {
10892                                 if (rtnl)
10893                                         rtnl_unlock();
10894                                 return -ENETDOWN;
10895                         }
10896                 }
10897
10898                 info->user_ptr[0] = rdev;
10899         }
10900
10901         return 0;
10902 }
10903
10904 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10905                               struct genl_info *info)
10906 {
10907         if (info->user_ptr[1]) {
10908                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10909                         struct wireless_dev *wdev = info->user_ptr[1];
10910
10911                         if (wdev->netdev)
10912                                 dev_put(wdev->netdev);
10913                 } else {
10914                         dev_put(info->user_ptr[1]);
10915                 }
10916         }
10917
10918         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10919                 rtnl_unlock();
10920
10921         /* If needed, clear the netlink message payload from the SKB
10922          * as it might contain key data that shouldn't stick around on
10923          * the heap after the SKB is freed. The netlink message header
10924          * is still needed for further processing, so leave it intact.
10925          */
10926         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10927                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10928
10929                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10930         }
10931 }
10932
10933 static const struct genl_ops nl80211_ops[] = {
10934         {
10935                 .cmd = NL80211_CMD_GET_WIPHY,
10936                 .doit = nl80211_get_wiphy,
10937                 .dumpit = nl80211_dump_wiphy,
10938                 .done = nl80211_dump_wiphy_done,
10939                 .policy = nl80211_policy,
10940                 /* can be retrieved by unprivileged users */
10941                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10942                                   NL80211_FLAG_NEED_RTNL,
10943         },
10944         {
10945                 .cmd = NL80211_CMD_SET_WIPHY,
10946                 .doit = nl80211_set_wiphy,
10947                 .policy = nl80211_policy,
10948                 .flags = GENL_ADMIN_PERM,
10949                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10950         },
10951         {
10952                 .cmd = NL80211_CMD_GET_INTERFACE,
10953                 .doit = nl80211_get_interface,
10954                 .dumpit = nl80211_dump_interface,
10955                 .policy = nl80211_policy,
10956                 /* can be retrieved by unprivileged users */
10957                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10958                                   NL80211_FLAG_NEED_RTNL,
10959         },
10960         {
10961                 .cmd = NL80211_CMD_SET_INTERFACE,
10962                 .doit = nl80211_set_interface,
10963                 .policy = nl80211_policy,
10964                 .flags = GENL_ADMIN_PERM,
10965                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10966                                   NL80211_FLAG_NEED_RTNL,
10967         },
10968         {
10969                 .cmd = NL80211_CMD_NEW_INTERFACE,
10970                 .doit = nl80211_new_interface,
10971                 .policy = nl80211_policy,
10972                 .flags = GENL_ADMIN_PERM,
10973                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10974                                   NL80211_FLAG_NEED_RTNL,
10975         },
10976         {
10977                 .cmd = NL80211_CMD_DEL_INTERFACE,
10978                 .doit = nl80211_del_interface,
10979                 .policy = nl80211_policy,
10980                 .flags = GENL_ADMIN_PERM,
10981                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10982                                   NL80211_FLAG_NEED_RTNL,
10983         },
10984         {
10985                 .cmd = NL80211_CMD_GET_KEY,
10986                 .doit = nl80211_get_key,
10987                 .policy = nl80211_policy,
10988                 .flags = GENL_ADMIN_PERM,
10989                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10990                                   NL80211_FLAG_NEED_RTNL,
10991         },
10992         {
10993                 .cmd = NL80211_CMD_SET_KEY,
10994                 .doit = nl80211_set_key,
10995                 .policy = nl80211_policy,
10996                 .flags = GENL_ADMIN_PERM,
10997                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10998                                   NL80211_FLAG_NEED_RTNL |
10999                                   NL80211_FLAG_CLEAR_SKB,
11000         },
11001         {
11002                 .cmd = NL80211_CMD_NEW_KEY,
11003                 .doit = nl80211_new_key,
11004                 .policy = nl80211_policy,
11005                 .flags = GENL_ADMIN_PERM,
11006                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11007                                   NL80211_FLAG_NEED_RTNL |
11008                                   NL80211_FLAG_CLEAR_SKB,
11009         },
11010         {
11011                 .cmd = NL80211_CMD_DEL_KEY,
11012                 .doit = nl80211_del_key,
11013                 .policy = nl80211_policy,
11014                 .flags = GENL_ADMIN_PERM,
11015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11016                                   NL80211_FLAG_NEED_RTNL,
11017         },
11018         {
11019                 .cmd = NL80211_CMD_SET_BEACON,
11020                 .policy = nl80211_policy,
11021                 .flags = GENL_ADMIN_PERM,
11022                 .doit = nl80211_set_beacon,
11023                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11024                                   NL80211_FLAG_NEED_RTNL,
11025         },
11026         {
11027                 .cmd = NL80211_CMD_START_AP,
11028                 .policy = nl80211_policy,
11029                 .flags = GENL_ADMIN_PERM,
11030                 .doit = nl80211_start_ap,
11031                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11032                                   NL80211_FLAG_NEED_RTNL,
11033         },
11034         {
11035                 .cmd = NL80211_CMD_STOP_AP,
11036                 .policy = nl80211_policy,
11037                 .flags = GENL_ADMIN_PERM,
11038                 .doit = nl80211_stop_ap,
11039                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11040                                   NL80211_FLAG_NEED_RTNL,
11041         },
11042         {
11043                 .cmd = NL80211_CMD_GET_STATION,
11044                 .doit = nl80211_get_station,
11045                 .dumpit = nl80211_dump_station,
11046                 .policy = nl80211_policy,
11047                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11048                                   NL80211_FLAG_NEED_RTNL,
11049         },
11050         {
11051                 .cmd = NL80211_CMD_SET_STATION,
11052                 .doit = nl80211_set_station,
11053                 .policy = nl80211_policy,
11054                 .flags = GENL_ADMIN_PERM,
11055                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11056                                   NL80211_FLAG_NEED_RTNL,
11057         },
11058         {
11059                 .cmd = NL80211_CMD_NEW_STATION,
11060                 .doit = nl80211_new_station,
11061                 .policy = nl80211_policy,
11062                 .flags = GENL_ADMIN_PERM,
11063                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11064                                   NL80211_FLAG_NEED_RTNL,
11065         },
11066         {
11067                 .cmd = NL80211_CMD_DEL_STATION,
11068                 .doit = nl80211_del_station,
11069                 .policy = nl80211_policy,
11070                 .flags = GENL_ADMIN_PERM,
11071                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11072                                   NL80211_FLAG_NEED_RTNL,
11073         },
11074         {
11075                 .cmd = NL80211_CMD_GET_MPATH,
11076                 .doit = nl80211_get_mpath,
11077                 .dumpit = nl80211_dump_mpath,
11078                 .policy = nl80211_policy,
11079                 .flags = GENL_ADMIN_PERM,
11080                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11081                                   NL80211_FLAG_NEED_RTNL,
11082         },
11083         {
11084                 .cmd = NL80211_CMD_GET_MPP,
11085                 .doit = nl80211_get_mpp,
11086                 .dumpit = nl80211_dump_mpp,
11087                 .policy = nl80211_policy,
11088                 .flags = GENL_ADMIN_PERM,
11089                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11090                                   NL80211_FLAG_NEED_RTNL,
11091         },
11092         {
11093                 .cmd = NL80211_CMD_SET_MPATH,
11094                 .doit = nl80211_set_mpath,
11095                 .policy = nl80211_policy,
11096                 .flags = GENL_ADMIN_PERM,
11097                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11098                                   NL80211_FLAG_NEED_RTNL,
11099         },
11100         {
11101                 .cmd = NL80211_CMD_NEW_MPATH,
11102                 .doit = nl80211_new_mpath,
11103                 .policy = nl80211_policy,
11104                 .flags = GENL_ADMIN_PERM,
11105                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11106                                   NL80211_FLAG_NEED_RTNL,
11107         },
11108         {
11109                 .cmd = NL80211_CMD_DEL_MPATH,
11110                 .doit = nl80211_del_mpath,
11111                 .policy = nl80211_policy,
11112                 .flags = GENL_ADMIN_PERM,
11113                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11114                                   NL80211_FLAG_NEED_RTNL,
11115         },
11116         {
11117                 .cmd = NL80211_CMD_SET_BSS,
11118                 .doit = nl80211_set_bss,
11119                 .policy = nl80211_policy,
11120                 .flags = GENL_ADMIN_PERM,
11121                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11122                                   NL80211_FLAG_NEED_RTNL,
11123         },
11124         {
11125                 .cmd = NL80211_CMD_GET_REG,
11126                 .doit = nl80211_get_reg_do,
11127                 .dumpit = nl80211_get_reg_dump,
11128                 .policy = nl80211_policy,
11129                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11130                 /* can be retrieved by unprivileged users */
11131         },
11132 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11133         {
11134                 .cmd = NL80211_CMD_SET_REG,
11135                 .doit = nl80211_set_reg,
11136                 .policy = nl80211_policy,
11137                 .flags = GENL_ADMIN_PERM,
11138                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11139         },
11140 #endif
11141         {
11142                 .cmd = NL80211_CMD_REQ_SET_REG,
11143                 .doit = nl80211_req_set_reg,
11144                 .policy = nl80211_policy,
11145                 .flags = GENL_ADMIN_PERM,
11146         },
11147         {
11148                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11149                 .doit = nl80211_get_mesh_config,
11150                 .policy = nl80211_policy,
11151                 /* can be retrieved by unprivileged users */
11152                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11153                                   NL80211_FLAG_NEED_RTNL,
11154         },
11155         {
11156                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11157                 .doit = nl80211_update_mesh_config,
11158                 .policy = nl80211_policy,
11159                 .flags = GENL_ADMIN_PERM,
11160                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11161                                   NL80211_FLAG_NEED_RTNL,
11162         },
11163         {
11164                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11165                 .doit = nl80211_trigger_scan,
11166                 .policy = nl80211_policy,
11167                 .flags = GENL_ADMIN_PERM,
11168                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11169                                   NL80211_FLAG_NEED_RTNL,
11170         },
11171         {
11172                 .cmd = NL80211_CMD_ABORT_SCAN,
11173                 .doit = nl80211_abort_scan,
11174                 .policy = nl80211_policy,
11175                 .flags = GENL_ADMIN_PERM,
11176                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11177                                   NL80211_FLAG_NEED_RTNL,
11178         },
11179         {
11180                 .cmd = NL80211_CMD_GET_SCAN,
11181                 .policy = nl80211_policy,
11182                 .dumpit = nl80211_dump_scan,
11183         },
11184         {
11185                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11186                 .doit = nl80211_start_sched_scan,
11187                 .policy = nl80211_policy,
11188                 .flags = GENL_ADMIN_PERM,
11189                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11190                                   NL80211_FLAG_NEED_RTNL,
11191         },
11192         {
11193                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11194                 .doit = nl80211_stop_sched_scan,
11195                 .policy = nl80211_policy,
11196                 .flags = GENL_ADMIN_PERM,
11197                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11198                                   NL80211_FLAG_NEED_RTNL,
11199         },
11200         {
11201                 .cmd = NL80211_CMD_AUTHENTICATE,
11202                 .doit = nl80211_authenticate,
11203                 .policy = nl80211_policy,
11204                 .flags = GENL_ADMIN_PERM,
11205                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11206                                   NL80211_FLAG_NEED_RTNL |
11207                                   NL80211_FLAG_CLEAR_SKB,
11208         },
11209         {
11210                 .cmd = NL80211_CMD_ASSOCIATE,
11211                 .doit = nl80211_associate,
11212                 .policy = nl80211_policy,
11213                 .flags = GENL_ADMIN_PERM,
11214                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11215                                   NL80211_FLAG_NEED_RTNL,
11216         },
11217         {
11218                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11219                 .doit = nl80211_deauthenticate,
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_DISASSOCIATE,
11227                 .doit = nl80211_disassociate,
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_JOIN_IBSS,
11235                 .doit = nl80211_join_ibss,
11236                 .policy = nl80211_policy,
11237                 .flags = GENL_ADMIN_PERM,
11238                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11239                                   NL80211_FLAG_NEED_RTNL,
11240         },
11241         {
11242                 .cmd = NL80211_CMD_LEAVE_IBSS,
11243                 .doit = nl80211_leave_ibss,
11244                 .policy = nl80211_policy,
11245                 .flags = GENL_ADMIN_PERM,
11246                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11247                                   NL80211_FLAG_NEED_RTNL,
11248         },
11249 #ifdef CONFIG_NL80211_TESTMODE
11250         {
11251                 .cmd = NL80211_CMD_TESTMODE,
11252                 .doit = nl80211_testmode_do,
11253                 .dumpit = nl80211_testmode_dump,
11254                 .policy = nl80211_policy,
11255                 .flags = GENL_ADMIN_PERM,
11256                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11257                                   NL80211_FLAG_NEED_RTNL,
11258         },
11259 #endif
11260         {
11261                 .cmd = NL80211_CMD_CONNECT,
11262                 .doit = nl80211_connect,
11263                 .policy = nl80211_policy,
11264                 .flags = GENL_ADMIN_PERM,
11265                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11266                                   NL80211_FLAG_NEED_RTNL,
11267         },
11268         {
11269                 .cmd = NL80211_CMD_DISCONNECT,
11270                 .doit = nl80211_disconnect,
11271                 .policy = nl80211_policy,
11272                 .flags = GENL_ADMIN_PERM,
11273                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11274                                   NL80211_FLAG_NEED_RTNL,
11275         },
11276         {
11277                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11278                 .doit = nl80211_wiphy_netns,
11279                 .policy = nl80211_policy,
11280                 .flags = GENL_ADMIN_PERM,
11281                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11282                                   NL80211_FLAG_NEED_RTNL,
11283         },
11284         {
11285                 .cmd = NL80211_CMD_GET_SURVEY,
11286                 .policy = nl80211_policy,
11287                 .dumpit = nl80211_dump_survey,
11288         },
11289         {
11290                 .cmd = NL80211_CMD_SET_PMKSA,
11291                 .doit = nl80211_setdel_pmksa,
11292                 .policy = nl80211_policy,
11293                 .flags = GENL_ADMIN_PERM,
11294                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11295                                   NL80211_FLAG_NEED_RTNL,
11296         },
11297         {
11298                 .cmd = NL80211_CMD_DEL_PMKSA,
11299                 .doit = nl80211_setdel_pmksa,
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_FLUSH_PMKSA,
11307                 .doit = nl80211_flush_pmksa,
11308                 .policy = nl80211_policy,
11309                 .flags = GENL_ADMIN_PERM,
11310                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11311                                   NL80211_FLAG_NEED_RTNL,
11312         },
11313         {
11314                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11315                 .doit = nl80211_remain_on_channel,
11316                 .policy = nl80211_policy,
11317                 .flags = GENL_ADMIN_PERM,
11318                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11319                                   NL80211_FLAG_NEED_RTNL,
11320         },
11321         {
11322                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11323                 .doit = nl80211_cancel_remain_on_channel,
11324                 .policy = nl80211_policy,
11325                 .flags = GENL_ADMIN_PERM,
11326                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11327                                   NL80211_FLAG_NEED_RTNL,
11328         },
11329         {
11330                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11331                 .doit = nl80211_set_tx_bitrate_mask,
11332                 .policy = nl80211_policy,
11333                 .flags = GENL_ADMIN_PERM,
11334                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11335                                   NL80211_FLAG_NEED_RTNL,
11336         },
11337         {
11338                 .cmd = NL80211_CMD_REGISTER_FRAME,
11339                 .doit = nl80211_register_mgmt,
11340                 .policy = nl80211_policy,
11341                 .flags = GENL_ADMIN_PERM,
11342                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11343                                   NL80211_FLAG_NEED_RTNL,
11344         },
11345         {
11346                 .cmd = NL80211_CMD_FRAME,
11347                 .doit = nl80211_tx_mgmt,
11348                 .policy = nl80211_policy,
11349                 .flags = GENL_ADMIN_PERM,
11350                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11351                                   NL80211_FLAG_NEED_RTNL,
11352         },
11353         {
11354                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11355                 .doit = nl80211_tx_mgmt_cancel_wait,
11356                 .policy = nl80211_policy,
11357                 .flags = GENL_ADMIN_PERM,
11358                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11359                                   NL80211_FLAG_NEED_RTNL,
11360         },
11361         {
11362                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11363                 .doit = nl80211_set_power_save,
11364                 .policy = nl80211_policy,
11365                 .flags = GENL_ADMIN_PERM,
11366                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11367                                   NL80211_FLAG_NEED_RTNL,
11368         },
11369         {
11370                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11371                 .doit = nl80211_get_power_save,
11372                 .policy = nl80211_policy,
11373                 /* can be retrieved by unprivileged users */
11374                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11375                                   NL80211_FLAG_NEED_RTNL,
11376         },
11377         {
11378                 .cmd = NL80211_CMD_SET_CQM,
11379                 .doit = nl80211_set_cqm,
11380                 .policy = nl80211_policy,
11381                 .flags = GENL_ADMIN_PERM,
11382                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11383                                   NL80211_FLAG_NEED_RTNL,
11384         },
11385         {
11386                 .cmd = NL80211_CMD_SET_CHANNEL,
11387                 .doit = nl80211_set_channel,
11388                 .policy = nl80211_policy,
11389                 .flags = GENL_ADMIN_PERM,
11390                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11391                                   NL80211_FLAG_NEED_RTNL,
11392         },
11393         {
11394                 .cmd = NL80211_CMD_SET_WDS_PEER,
11395                 .doit = nl80211_set_wds_peer,
11396                 .policy = nl80211_policy,
11397                 .flags = GENL_ADMIN_PERM,
11398                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11399                                   NL80211_FLAG_NEED_RTNL,
11400         },
11401         {
11402                 .cmd = NL80211_CMD_JOIN_MESH,
11403                 .doit = nl80211_join_mesh,
11404                 .policy = nl80211_policy,
11405                 .flags = GENL_ADMIN_PERM,
11406                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11407                                   NL80211_FLAG_NEED_RTNL,
11408         },
11409         {
11410                 .cmd = NL80211_CMD_LEAVE_MESH,
11411                 .doit = nl80211_leave_mesh,
11412                 .policy = nl80211_policy,
11413                 .flags = GENL_ADMIN_PERM,
11414                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11415                                   NL80211_FLAG_NEED_RTNL,
11416         },
11417         {
11418                 .cmd = NL80211_CMD_JOIN_OCB,
11419                 .doit = nl80211_join_ocb,
11420                 .policy = nl80211_policy,
11421                 .flags = GENL_ADMIN_PERM,
11422                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11423                                   NL80211_FLAG_NEED_RTNL,
11424         },
11425         {
11426                 .cmd = NL80211_CMD_LEAVE_OCB,
11427                 .doit = nl80211_leave_ocb,
11428                 .policy = nl80211_policy,
11429                 .flags = GENL_ADMIN_PERM,
11430                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11431                                   NL80211_FLAG_NEED_RTNL,
11432         },
11433 #ifdef CONFIG_PM
11434         {
11435                 .cmd = NL80211_CMD_GET_WOWLAN,
11436                 .doit = nl80211_get_wowlan,
11437                 .policy = nl80211_policy,
11438                 /* can be retrieved by unprivileged users */
11439                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11440                                   NL80211_FLAG_NEED_RTNL,
11441         },
11442         {
11443                 .cmd = NL80211_CMD_SET_WOWLAN,
11444                 .doit = nl80211_set_wowlan,
11445                 .policy = nl80211_policy,
11446                 .flags = GENL_ADMIN_PERM,
11447                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11448                                   NL80211_FLAG_NEED_RTNL,
11449         },
11450 #endif
11451         {
11452                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11453                 .doit = nl80211_set_rekey_data,
11454                 .policy = nl80211_policy,
11455                 .flags = GENL_ADMIN_PERM,
11456                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11457                                   NL80211_FLAG_NEED_RTNL |
11458                                   NL80211_FLAG_CLEAR_SKB,
11459         },
11460         {
11461                 .cmd = NL80211_CMD_TDLS_MGMT,
11462                 .doit = nl80211_tdls_mgmt,
11463                 .policy = nl80211_policy,
11464                 .flags = GENL_ADMIN_PERM,
11465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11466                                   NL80211_FLAG_NEED_RTNL,
11467         },
11468         {
11469                 .cmd = NL80211_CMD_TDLS_OPER,
11470                 .doit = nl80211_tdls_oper,
11471                 .policy = nl80211_policy,
11472                 .flags = GENL_ADMIN_PERM,
11473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11474                                   NL80211_FLAG_NEED_RTNL,
11475         },
11476         {
11477                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11478                 .doit = nl80211_register_unexpected_frame,
11479                 .policy = nl80211_policy,
11480                 .flags = GENL_ADMIN_PERM,
11481                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11482                                   NL80211_FLAG_NEED_RTNL,
11483         },
11484         {
11485                 .cmd = NL80211_CMD_PROBE_CLIENT,
11486                 .doit = nl80211_probe_client,
11487                 .policy = nl80211_policy,
11488                 .flags = GENL_ADMIN_PERM,
11489                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11490                                   NL80211_FLAG_NEED_RTNL,
11491         },
11492         {
11493                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11494                 .doit = nl80211_register_beacons,
11495                 .policy = nl80211_policy,
11496                 .flags = GENL_ADMIN_PERM,
11497                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11498                                   NL80211_FLAG_NEED_RTNL,
11499         },
11500         {
11501                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11502                 .doit = nl80211_set_noack_map,
11503                 .policy = nl80211_policy,
11504                 .flags = GENL_ADMIN_PERM,
11505                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11506                                   NL80211_FLAG_NEED_RTNL,
11507         },
11508         {
11509                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11510                 .doit = nl80211_start_p2p_device,
11511                 .policy = nl80211_policy,
11512                 .flags = GENL_ADMIN_PERM,
11513                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11514                                   NL80211_FLAG_NEED_RTNL,
11515         },
11516         {
11517                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11518                 .doit = nl80211_stop_p2p_device,
11519                 .policy = nl80211_policy,
11520                 .flags = GENL_ADMIN_PERM,
11521                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11522                                   NL80211_FLAG_NEED_RTNL,
11523         },
11524         {
11525                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11526                 .doit = nl80211_set_mcast_rate,
11527                 .policy = nl80211_policy,
11528                 .flags = GENL_ADMIN_PERM,
11529                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11530                                   NL80211_FLAG_NEED_RTNL,
11531         },
11532         {
11533                 .cmd = NL80211_CMD_SET_MAC_ACL,
11534                 .doit = nl80211_set_mac_acl,
11535                 .policy = nl80211_policy,
11536                 .flags = GENL_ADMIN_PERM,
11537                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11538                                   NL80211_FLAG_NEED_RTNL,
11539         },
11540         {
11541                 .cmd = NL80211_CMD_RADAR_DETECT,
11542                 .doit = nl80211_start_radar_detection,
11543                 .policy = nl80211_policy,
11544                 .flags = GENL_ADMIN_PERM,
11545                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11546                                   NL80211_FLAG_NEED_RTNL,
11547         },
11548         {
11549                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11550                 .doit = nl80211_get_protocol_features,
11551                 .policy = nl80211_policy,
11552         },
11553         {
11554                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11555                 .doit = nl80211_update_ft_ies,
11556                 .policy = nl80211_policy,
11557                 .flags = GENL_ADMIN_PERM,
11558                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11559                                   NL80211_FLAG_NEED_RTNL,
11560         },
11561         {
11562                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11563                 .doit = nl80211_crit_protocol_start,
11564                 .policy = nl80211_policy,
11565                 .flags = GENL_ADMIN_PERM,
11566                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11567                                   NL80211_FLAG_NEED_RTNL,
11568         },
11569         {
11570                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11571                 .doit = nl80211_crit_protocol_stop,
11572                 .policy = nl80211_policy,
11573                 .flags = GENL_ADMIN_PERM,
11574                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11575                                   NL80211_FLAG_NEED_RTNL,
11576         },
11577         {
11578                 .cmd = NL80211_CMD_GET_COALESCE,
11579                 .doit = nl80211_get_coalesce,
11580                 .policy = nl80211_policy,
11581                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11582                                   NL80211_FLAG_NEED_RTNL,
11583         },
11584         {
11585                 .cmd = NL80211_CMD_SET_COALESCE,
11586                 .doit = nl80211_set_coalesce,
11587                 .policy = nl80211_policy,
11588                 .flags = GENL_ADMIN_PERM,
11589                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11590                                   NL80211_FLAG_NEED_RTNL,
11591         },
11592         {
11593                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11594                 .doit = nl80211_channel_switch,
11595                 .policy = nl80211_policy,
11596                 .flags = GENL_ADMIN_PERM,
11597                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11598                                   NL80211_FLAG_NEED_RTNL,
11599         },
11600         {
11601                 .cmd = NL80211_CMD_VENDOR,
11602                 .doit = nl80211_vendor_cmd,
11603                 .dumpit = nl80211_vendor_cmd_dump,
11604                 .policy = nl80211_policy,
11605                 .flags = GENL_ADMIN_PERM,
11606                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11607                                   NL80211_FLAG_NEED_RTNL,
11608         },
11609         {
11610                 .cmd = NL80211_CMD_SET_QOS_MAP,
11611                 .doit = nl80211_set_qos_map,
11612                 .policy = nl80211_policy,
11613                 .flags = GENL_ADMIN_PERM,
11614                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11615                                   NL80211_FLAG_NEED_RTNL,
11616         },
11617         {
11618                 .cmd = NL80211_CMD_ADD_TX_TS,
11619                 .doit = nl80211_add_tx_ts,
11620                 .policy = nl80211_policy,
11621                 .flags = GENL_ADMIN_PERM,
11622                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11623                                   NL80211_FLAG_NEED_RTNL,
11624         },
11625         {
11626                 .cmd = NL80211_CMD_DEL_TX_TS,
11627                 .doit = nl80211_del_tx_ts,
11628                 .policy = nl80211_policy,
11629                 .flags = GENL_ADMIN_PERM,
11630                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11631                                   NL80211_FLAG_NEED_RTNL,
11632         },
11633         {
11634                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11635                 .doit = nl80211_tdls_channel_switch,
11636                 .policy = nl80211_policy,
11637                 .flags = GENL_ADMIN_PERM,
11638                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11639                                   NL80211_FLAG_NEED_RTNL,
11640         },
11641         {
11642                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11643                 .doit = nl80211_tdls_cancel_channel_switch,
11644                 .policy = nl80211_policy,
11645                 .flags = GENL_ADMIN_PERM,
11646                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11647                                   NL80211_FLAG_NEED_RTNL,
11648         },
11649 };
11650
11651 /* notification functions */
11652
11653 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11654                           enum nl80211_commands cmd)
11655 {
11656         struct sk_buff *msg;
11657         struct nl80211_dump_wiphy_state state = {};
11658
11659         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11660                 cmd != NL80211_CMD_DEL_WIPHY);
11661
11662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11663         if (!msg)
11664                 return;
11665
11666         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11667                 nlmsg_free(msg);
11668                 return;
11669         }
11670
11671         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11672                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11673 }
11674
11675 static int nl80211_add_scan_req(struct sk_buff *msg,
11676                                 struct cfg80211_registered_device *rdev)
11677 {
11678         struct cfg80211_scan_request *req = rdev->scan_req;
11679         struct nlattr *nest;
11680         int i;
11681
11682         if (WARN_ON(!req))
11683                 return 0;
11684
11685         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11686         if (!nest)
11687                 goto nla_put_failure;
11688         for (i = 0; i < req->n_ssids; i++) {
11689                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11690                         goto nla_put_failure;
11691         }
11692         nla_nest_end(msg, nest);
11693
11694         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11695         if (!nest)
11696                 goto nla_put_failure;
11697         for (i = 0; i < req->n_channels; i++) {
11698                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11699                         goto nla_put_failure;
11700         }
11701         nla_nest_end(msg, nest);
11702
11703         if (req->ie &&
11704             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11705                 goto nla_put_failure;
11706
11707         if (req->flags &&
11708             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11709                 goto nla_put_failure;
11710
11711         return 0;
11712  nla_put_failure:
11713         return -ENOBUFS;
11714 }
11715
11716 static int nl80211_send_scan_msg(struct sk_buff *msg,
11717                                  struct cfg80211_registered_device *rdev,
11718                                  struct wireless_dev *wdev,
11719                                  u32 portid, u32 seq, int flags,
11720                                  u32 cmd)
11721 {
11722         void *hdr;
11723
11724         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11725         if (!hdr)
11726                 return -1;
11727
11728         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11729             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11730                                          wdev->netdev->ifindex)) ||
11731             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11732                               NL80211_ATTR_PAD))
11733                 goto nla_put_failure;
11734
11735         /* ignore errors and send incomplete event anyway */
11736         nl80211_add_scan_req(msg, rdev);
11737
11738         genlmsg_end(msg, hdr);
11739         return 0;
11740
11741  nla_put_failure:
11742         genlmsg_cancel(msg, hdr);
11743         return -EMSGSIZE;
11744 }
11745
11746 static int
11747 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11748                             struct cfg80211_registered_device *rdev,
11749                             struct net_device *netdev,
11750                             u32 portid, u32 seq, int flags, u32 cmd)
11751 {
11752         void *hdr;
11753
11754         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11755         if (!hdr)
11756                 return -1;
11757
11758         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11759             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11760                 goto nla_put_failure;
11761
11762         genlmsg_end(msg, hdr);
11763         return 0;
11764
11765  nla_put_failure:
11766         genlmsg_cancel(msg, hdr);
11767         return -EMSGSIZE;
11768 }
11769
11770 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11771                              struct wireless_dev *wdev)
11772 {
11773         struct sk_buff *msg;
11774
11775         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11776         if (!msg)
11777                 return;
11778
11779         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11780                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11781                 nlmsg_free(msg);
11782                 return;
11783         }
11784
11785         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11786                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11787 }
11788
11789 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11790                                        struct wireless_dev *wdev, bool aborted)
11791 {
11792         struct sk_buff *msg;
11793
11794         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11795         if (!msg)
11796                 return NULL;
11797
11798         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11799                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11800                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11801                 nlmsg_free(msg);
11802                 return NULL;
11803         }
11804
11805         return msg;
11806 }
11807
11808 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11809                               struct sk_buff *msg)
11810 {
11811         if (!msg)
11812                 return;
11813
11814         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11815                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11816 }
11817
11818 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11819                                      struct net_device *netdev)
11820 {
11821         struct sk_buff *msg;
11822
11823         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11824         if (!msg)
11825                 return;
11826
11827         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11828                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11829                 nlmsg_free(msg);
11830                 return;
11831         }
11832
11833         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11834                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11835 }
11836
11837 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11838                              struct net_device *netdev, u32 cmd)
11839 {
11840         struct sk_buff *msg;
11841
11842         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11843         if (!msg)
11844                 return;
11845
11846         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11847                 nlmsg_free(msg);
11848                 return;
11849         }
11850
11851         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11852                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11853 }
11854
11855 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11856                                           struct regulatory_request *request)
11857 {
11858         /* Userspace can always count this one always being set */
11859         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11860                 goto nla_put_failure;
11861
11862         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11863                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11864                                NL80211_REGDOM_TYPE_WORLD))
11865                         goto nla_put_failure;
11866         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11867                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11868                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11869                         goto nla_put_failure;
11870         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11871                    request->intersect) {
11872                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11873                                NL80211_REGDOM_TYPE_INTERSECTION))
11874                         goto nla_put_failure;
11875         } else {
11876                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11877                                NL80211_REGDOM_TYPE_COUNTRY) ||
11878                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11879                                    request->alpha2))
11880                         goto nla_put_failure;
11881         }
11882
11883         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11884                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11885
11886                 if (wiphy &&
11887                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11888                         goto nla_put_failure;
11889
11890                 if (wiphy &&
11891                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11892                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11893                         goto nla_put_failure;
11894         }
11895
11896         return true;
11897
11898 nla_put_failure:
11899         return false;
11900 }
11901
11902 /*
11903  * This can happen on global regulatory changes or device specific settings
11904  * based on custom regulatory domains.
11905  */
11906 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11907                                      struct regulatory_request *request)
11908 {
11909         struct sk_buff *msg;
11910         void *hdr;
11911
11912         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11913         if (!msg)
11914                 return;
11915
11916         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11917         if (!hdr) {
11918                 nlmsg_free(msg);
11919                 return;
11920         }
11921
11922         if (nl80211_reg_change_event_fill(msg, request) == false)
11923                 goto nla_put_failure;
11924
11925         genlmsg_end(msg, hdr);
11926
11927         rcu_read_lock();
11928         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11929                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11930         rcu_read_unlock();
11931
11932         return;
11933
11934 nla_put_failure:
11935         genlmsg_cancel(msg, hdr);
11936         nlmsg_free(msg);
11937 }
11938
11939 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11940                                     struct net_device *netdev,
11941                                     const u8 *buf, size_t len,
11942                                     enum nl80211_commands cmd, gfp_t gfp,
11943                                     int uapsd_queues)
11944 {
11945         struct sk_buff *msg;
11946         void *hdr;
11947
11948         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11949         if (!msg)
11950                 return;
11951
11952         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11953         if (!hdr) {
11954                 nlmsg_free(msg);
11955                 return;
11956         }
11957
11958         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11959             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11960             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11961                 goto nla_put_failure;
11962
11963         if (uapsd_queues >= 0) {
11964                 struct nlattr *nla_wmm =
11965                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11966                 if (!nla_wmm)
11967                         goto nla_put_failure;
11968
11969                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11970                                uapsd_queues))
11971                         goto nla_put_failure;
11972
11973                 nla_nest_end(msg, nla_wmm);
11974         }
11975
11976         genlmsg_end(msg, hdr);
11977
11978         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11979                                 NL80211_MCGRP_MLME, gfp);
11980         return;
11981
11982  nla_put_failure:
11983         genlmsg_cancel(msg, hdr);
11984         nlmsg_free(msg);
11985 }
11986
11987 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11988                           struct net_device *netdev, const u8 *buf,
11989                           size_t len, gfp_t gfp)
11990 {
11991         nl80211_send_mlme_event(rdev, netdev, buf, len,
11992                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11993 }
11994
11995 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11996                            struct net_device *netdev, const u8 *buf,
11997                            size_t len, gfp_t gfp, int uapsd_queues)
11998 {
11999         nl80211_send_mlme_event(rdev, netdev, buf, len,
12000                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12001 }
12002
12003 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12004                          struct net_device *netdev, const u8 *buf,
12005                          size_t len, gfp_t gfp)
12006 {
12007         nl80211_send_mlme_event(rdev, netdev, buf, len,
12008                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12009 }
12010
12011 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12012                            struct net_device *netdev, const u8 *buf,
12013                            size_t len, gfp_t gfp)
12014 {
12015         nl80211_send_mlme_event(rdev, netdev, buf, len,
12016                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12017 }
12018
12019 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12020                                   size_t len)
12021 {
12022         struct wireless_dev *wdev = dev->ieee80211_ptr;
12023         struct wiphy *wiphy = wdev->wiphy;
12024         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12025         const struct ieee80211_mgmt *mgmt = (void *)buf;
12026         u32 cmd;
12027
12028         if (WARN_ON(len < 2))
12029                 return;
12030
12031         if (ieee80211_is_deauth(mgmt->frame_control))
12032                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12033         else
12034                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12035
12036         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12037         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12038 }
12039 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12040
12041 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12042                                       struct net_device *netdev, int cmd,
12043                                       const u8 *addr, 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, cmd);
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             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12061             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12062                 goto nla_put_failure;
12063
12064         genlmsg_end(msg, hdr);
12065
12066         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12067                                 NL80211_MCGRP_MLME, gfp);
12068         return;
12069
12070  nla_put_failure:
12071         genlmsg_cancel(msg, hdr);
12072         nlmsg_free(msg);
12073 }
12074
12075 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12076                                struct net_device *netdev, const u8 *addr,
12077                                gfp_t gfp)
12078 {
12079         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12080                                   addr, gfp);
12081 }
12082
12083 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12084                                 struct net_device *netdev, const u8 *addr,
12085                                 gfp_t gfp)
12086 {
12087         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12088                                   addr, gfp);
12089 }
12090
12091 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12092                                  struct net_device *netdev, const u8 *bssid,
12093                                  const u8 *req_ie, size_t req_ie_len,
12094                                  const u8 *resp_ie, size_t resp_ie_len,
12095                                  u16 status, gfp_t gfp)
12096 {
12097         struct sk_buff *msg;
12098         void *hdr;
12099
12100         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12101         if (!msg)
12102                 return;
12103
12104         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12105         if (!hdr) {
12106                 nlmsg_free(msg);
12107                 return;
12108         }
12109
12110         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12111             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12112             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12113             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
12114             (req_ie &&
12115              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12116             (resp_ie &&
12117              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12118                 goto nla_put_failure;
12119
12120         genlmsg_end(msg, hdr);
12121
12122         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12123                                 NL80211_MCGRP_MLME, gfp);
12124         return;
12125
12126  nla_put_failure:
12127         genlmsg_cancel(msg, hdr);
12128         nlmsg_free(msg);
12129
12130 }
12131
12132 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12133                          struct net_device *netdev, const u8 *bssid,
12134                          const u8 *req_ie, size_t req_ie_len,
12135                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12136 {
12137         struct sk_buff *msg;
12138         void *hdr;
12139
12140         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12141         if (!msg)
12142                 return;
12143
12144         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12145         if (!hdr) {
12146                 nlmsg_free(msg);
12147                 return;
12148         }
12149
12150         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12151             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12152             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12153             (req_ie &&
12154              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12155             (resp_ie &&
12156              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12157                 goto nla_put_failure;
12158
12159         genlmsg_end(msg, hdr);
12160
12161         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12162                                 NL80211_MCGRP_MLME, gfp);
12163         return;
12164
12165  nla_put_failure:
12166         genlmsg_cancel(msg, hdr);
12167         nlmsg_free(msg);
12168
12169 }
12170
12171 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12172                                struct net_device *netdev, u16 reason,
12173                                const u8 *ie, size_t ie_len, bool from_ap)
12174 {
12175         struct sk_buff *msg;
12176         void *hdr;
12177
12178         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12179         if (!msg)
12180                 return;
12181
12182         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12183         if (!hdr) {
12184                 nlmsg_free(msg);
12185                 return;
12186         }
12187
12188         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12189             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12190             (from_ap && reason &&
12191              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12192             (from_ap &&
12193              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12194             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12195                 goto nla_put_failure;
12196
12197         genlmsg_end(msg, hdr);
12198
12199         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12200                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12201         return;
12202
12203  nla_put_failure:
12204         genlmsg_cancel(msg, hdr);
12205         nlmsg_free(msg);
12206
12207 }
12208
12209 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12210                              struct net_device *netdev, const u8 *bssid,
12211                              gfp_t gfp)
12212 {
12213         struct sk_buff *msg;
12214         void *hdr;
12215
12216         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12217         if (!msg)
12218                 return;
12219
12220         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12221         if (!hdr) {
12222                 nlmsg_free(msg);
12223                 return;
12224         }
12225
12226         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12227             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12228             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12229                 goto nla_put_failure;
12230
12231         genlmsg_end(msg, hdr);
12232
12233         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12234                                 NL80211_MCGRP_MLME, gfp);
12235         return;
12236
12237  nla_put_failure:
12238         genlmsg_cancel(msg, hdr);
12239         nlmsg_free(msg);
12240 }
12241
12242 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12243                                         const u8* ie, u8 ie_len, gfp_t gfp)
12244 {
12245         struct wireless_dev *wdev = dev->ieee80211_ptr;
12246         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12247         struct sk_buff *msg;
12248         void *hdr;
12249
12250         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12251                 return;
12252
12253         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12254
12255         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12256         if (!msg)
12257                 return;
12258
12259         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12260         if (!hdr) {
12261                 nlmsg_free(msg);
12262                 return;
12263         }
12264
12265         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12266             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12267             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12268             (ie_len && ie &&
12269              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12270                 goto nla_put_failure;
12271
12272         genlmsg_end(msg, hdr);
12273
12274         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12275                                 NL80211_MCGRP_MLME, gfp);
12276         return;
12277
12278  nla_put_failure:
12279         genlmsg_cancel(msg, hdr);
12280         nlmsg_free(msg);
12281 }
12282 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12283
12284 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12285                                  struct net_device *netdev, const u8 *addr,
12286                                  enum nl80211_key_type key_type, int key_id,
12287                                  const u8 *tsc, gfp_t gfp)
12288 {
12289         struct sk_buff *msg;
12290         void *hdr;
12291
12292         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12293         if (!msg)
12294                 return;
12295
12296         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12297         if (!hdr) {
12298                 nlmsg_free(msg);
12299                 return;
12300         }
12301
12302         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12303             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12304             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12305             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12306             (key_id != -1 &&
12307              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12308             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12309                 goto nla_put_failure;
12310
12311         genlmsg_end(msg, hdr);
12312
12313         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12314                                 NL80211_MCGRP_MLME, gfp);
12315         return;
12316
12317  nla_put_failure:
12318         genlmsg_cancel(msg, hdr);
12319         nlmsg_free(msg);
12320 }
12321
12322 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12323                                     struct ieee80211_channel *channel_before,
12324                                     struct ieee80211_channel *channel_after)
12325 {
12326         struct sk_buff *msg;
12327         void *hdr;
12328         struct nlattr *nl_freq;
12329
12330         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12331         if (!msg)
12332                 return;
12333
12334         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12335         if (!hdr) {
12336                 nlmsg_free(msg);
12337                 return;
12338         }
12339
12340         /*
12341          * Since we are applying the beacon hint to a wiphy we know its
12342          * wiphy_idx is valid
12343          */
12344         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12345                 goto nla_put_failure;
12346
12347         /* Before */
12348         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12349         if (!nl_freq)
12350                 goto nla_put_failure;
12351         if (nl80211_msg_put_channel(msg, channel_before, false))
12352                 goto nla_put_failure;
12353         nla_nest_end(msg, nl_freq);
12354
12355         /* After */
12356         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12357         if (!nl_freq)
12358                 goto nla_put_failure;
12359         if (nl80211_msg_put_channel(msg, channel_after, false))
12360                 goto nla_put_failure;
12361         nla_nest_end(msg, nl_freq);
12362
12363         genlmsg_end(msg, hdr);
12364
12365         rcu_read_lock();
12366         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12367                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12368         rcu_read_unlock();
12369
12370         return;
12371
12372 nla_put_failure:
12373         genlmsg_cancel(msg, hdr);
12374         nlmsg_free(msg);
12375 }
12376
12377 static void nl80211_send_remain_on_chan_event(
12378         int cmd, struct cfg80211_registered_device *rdev,
12379         struct wireless_dev *wdev, u64 cookie,
12380         struct ieee80211_channel *chan,
12381         unsigned int duration, gfp_t gfp)
12382 {
12383         struct sk_buff *msg;
12384         void *hdr;
12385
12386         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12387         if (!msg)
12388                 return;
12389
12390         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12391         if (!hdr) {
12392                 nlmsg_free(msg);
12393                 return;
12394         }
12395
12396         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12397             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12398                                          wdev->netdev->ifindex)) ||
12399             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12400                               NL80211_ATTR_PAD) ||
12401             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12402             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12403                         NL80211_CHAN_NO_HT) ||
12404             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12405                               NL80211_ATTR_PAD))
12406                 goto nla_put_failure;
12407
12408         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12409             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12410                 goto nla_put_failure;
12411
12412         genlmsg_end(msg, hdr);
12413
12414         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12415                                 NL80211_MCGRP_MLME, gfp);
12416         return;
12417
12418  nla_put_failure:
12419         genlmsg_cancel(msg, hdr);
12420         nlmsg_free(msg);
12421 }
12422
12423 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12424                                struct ieee80211_channel *chan,
12425                                unsigned int duration, gfp_t gfp)
12426 {
12427         struct wiphy *wiphy = wdev->wiphy;
12428         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12429
12430         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12431         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12432                                           rdev, wdev, cookie, chan,
12433                                           duration, gfp);
12434 }
12435 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12436
12437 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12438                                         struct ieee80211_channel *chan,
12439                                         gfp_t gfp)
12440 {
12441         struct wiphy *wiphy = wdev->wiphy;
12442         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12443
12444         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12445         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12446                                           rdev, wdev, cookie, chan, 0, gfp);
12447 }
12448 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12449
12450 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12451                       struct station_info *sinfo, gfp_t gfp)
12452 {
12453         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12454         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12455         struct sk_buff *msg;
12456
12457         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12458
12459         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12460         if (!msg)
12461                 return;
12462
12463         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12464                                  rdev, dev, mac_addr, sinfo) < 0) {
12465                 nlmsg_free(msg);
12466                 return;
12467         }
12468
12469         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12470                                 NL80211_MCGRP_MLME, gfp);
12471 }
12472 EXPORT_SYMBOL(cfg80211_new_sta);
12473
12474 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12475                             struct station_info *sinfo, gfp_t gfp)
12476 {
12477         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12478         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12479         struct sk_buff *msg;
12480         struct station_info empty_sinfo = {};
12481
12482         if (!sinfo)
12483                 sinfo = &empty_sinfo;
12484
12485         trace_cfg80211_del_sta(dev, mac_addr);
12486
12487         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12488         if (!msg)
12489                 return;
12490
12491         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12492                                  rdev, dev, mac_addr, sinfo) < 0) {
12493                 nlmsg_free(msg);
12494                 return;
12495         }
12496
12497         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12498                                 NL80211_MCGRP_MLME, gfp);
12499 }
12500 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12501
12502 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12503                           enum nl80211_connect_failed_reason reason,
12504                           gfp_t gfp)
12505 {
12506         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12507         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12508         struct sk_buff *msg;
12509         void *hdr;
12510
12511         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12512         if (!msg)
12513                 return;
12514
12515         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12516         if (!hdr) {
12517                 nlmsg_free(msg);
12518                 return;
12519         }
12520
12521         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12522             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12523             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12524                 goto nla_put_failure;
12525
12526         genlmsg_end(msg, hdr);
12527
12528         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12529                                 NL80211_MCGRP_MLME, gfp);
12530         return;
12531
12532  nla_put_failure:
12533         genlmsg_cancel(msg, hdr);
12534         nlmsg_free(msg);
12535 }
12536 EXPORT_SYMBOL(cfg80211_conn_failed);
12537
12538 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12539                                        const u8 *addr, gfp_t gfp)
12540 {
12541         struct wireless_dev *wdev = dev->ieee80211_ptr;
12542         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12543         struct sk_buff *msg;
12544         void *hdr;
12545         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12546
12547         if (!nlportid)
12548                 return false;
12549
12550         msg = nlmsg_new(100, gfp);
12551         if (!msg)
12552                 return true;
12553
12554         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12555         if (!hdr) {
12556                 nlmsg_free(msg);
12557                 return true;
12558         }
12559
12560         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12561             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12562             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12563                 goto nla_put_failure;
12564
12565         genlmsg_end(msg, hdr);
12566         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12567         return true;
12568
12569  nla_put_failure:
12570         genlmsg_cancel(msg, hdr);
12571         nlmsg_free(msg);
12572         return true;
12573 }
12574
12575 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12576                                 const u8 *addr, gfp_t gfp)
12577 {
12578         struct wireless_dev *wdev = dev->ieee80211_ptr;
12579         bool ret;
12580
12581         trace_cfg80211_rx_spurious_frame(dev, addr);
12582
12583         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12584                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12585                 trace_cfg80211_return_bool(false);
12586                 return false;
12587         }
12588         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12589                                          addr, gfp);
12590         trace_cfg80211_return_bool(ret);
12591         return ret;
12592 }
12593 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12594
12595 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12596                                         const u8 *addr, gfp_t gfp)
12597 {
12598         struct wireless_dev *wdev = dev->ieee80211_ptr;
12599         bool ret;
12600
12601         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12602
12603         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12604                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12605                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12606                 trace_cfg80211_return_bool(false);
12607                 return false;
12608         }
12609         ret = __nl80211_unexpected_frame(dev,
12610                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12611                                          addr, gfp);
12612         trace_cfg80211_return_bool(ret);
12613         return ret;
12614 }
12615 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12616
12617 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12618                       struct wireless_dev *wdev, u32 nlportid,
12619                       int freq, int sig_dbm,
12620                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12621 {
12622         struct net_device *netdev = wdev->netdev;
12623         struct sk_buff *msg;
12624         void *hdr;
12625
12626         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12627         if (!msg)
12628                 return -ENOMEM;
12629
12630         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12631         if (!hdr) {
12632                 nlmsg_free(msg);
12633                 return -ENOMEM;
12634         }
12635
12636         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12637             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12638                                         netdev->ifindex)) ||
12639             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12640                               NL80211_ATTR_PAD) ||
12641             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12642             (sig_dbm &&
12643              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12644             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12645             (flags &&
12646              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12647                 goto nla_put_failure;
12648
12649         genlmsg_end(msg, hdr);
12650
12651         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12652
12653  nla_put_failure:
12654         genlmsg_cancel(msg, hdr);
12655         nlmsg_free(msg);
12656         return -ENOBUFS;
12657 }
12658
12659 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12660                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12661 {
12662         struct wiphy *wiphy = wdev->wiphy;
12663         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12664         struct net_device *netdev = wdev->netdev;
12665         struct sk_buff *msg;
12666         void *hdr;
12667
12668         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12669
12670         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12671         if (!msg)
12672                 return;
12673
12674         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12675         if (!hdr) {
12676                 nlmsg_free(msg);
12677                 return;
12678         }
12679
12680         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12681             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12682                                    netdev->ifindex)) ||
12683             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12684                               NL80211_ATTR_PAD) ||
12685             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12686             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12687                               NL80211_ATTR_PAD) ||
12688             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12689                 goto nla_put_failure;
12690
12691         genlmsg_end(msg, hdr);
12692
12693         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12694                                 NL80211_MCGRP_MLME, gfp);
12695         return;
12696
12697  nla_put_failure:
12698         genlmsg_cancel(msg, hdr);
12699         nlmsg_free(msg);
12700 }
12701 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12702
12703 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12704                                             const char *mac, gfp_t gfp)
12705 {
12706         struct wireless_dev *wdev = dev->ieee80211_ptr;
12707         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12708         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12709         void **cb;
12710
12711         if (!msg)
12712                 return NULL;
12713
12714         cb = (void **)msg->cb;
12715
12716         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12717         if (!cb[0]) {
12718                 nlmsg_free(msg);
12719                 return NULL;
12720         }
12721
12722         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12723             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12724                 goto nla_put_failure;
12725
12726         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12727                 goto nla_put_failure;
12728
12729         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12730         if (!cb[1])
12731                 goto nla_put_failure;
12732
12733         cb[2] = rdev;
12734
12735         return msg;
12736  nla_put_failure:
12737         nlmsg_free(msg);
12738         return NULL;
12739 }
12740
12741 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12742 {
12743         void **cb = (void **)msg->cb;
12744         struct cfg80211_registered_device *rdev = cb[2];
12745
12746         nla_nest_end(msg, cb[1]);
12747         genlmsg_end(msg, cb[0]);
12748
12749         memset(msg->cb, 0, sizeof(msg->cb));
12750
12751         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12752                                 NL80211_MCGRP_MLME, gfp);
12753 }
12754
12755 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12756                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12757                               gfp_t gfp)
12758 {
12759         struct sk_buff *msg;
12760
12761         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12762
12763         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12764                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12765                 return;
12766
12767         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12768         if (!msg)
12769                 return;
12770
12771         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12772                         rssi_event))
12773                 goto nla_put_failure;
12774
12775         cfg80211_send_cqm(msg, gfp);
12776
12777         return;
12778
12779  nla_put_failure:
12780         nlmsg_free(msg);
12781 }
12782 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12783
12784 void cfg80211_cqm_txe_notify(struct net_device *dev,
12785                              const u8 *peer, u32 num_packets,
12786                              u32 rate, u32 intvl, gfp_t gfp)
12787 {
12788         struct sk_buff *msg;
12789
12790         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12791         if (!msg)
12792                 return;
12793
12794         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12795                 goto nla_put_failure;
12796
12797         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12798                 goto nla_put_failure;
12799
12800         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12801                 goto nla_put_failure;
12802
12803         cfg80211_send_cqm(msg, gfp);
12804         return;
12805
12806  nla_put_failure:
12807         nlmsg_free(msg);
12808 }
12809 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12810
12811 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12812                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12813 {
12814         struct sk_buff *msg;
12815
12816         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12817
12818         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12819         if (!msg)
12820                 return;
12821
12822         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12823                 goto nla_put_failure;
12824
12825         cfg80211_send_cqm(msg, gfp);
12826         return;
12827
12828  nla_put_failure:
12829         nlmsg_free(msg);
12830 }
12831 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12832
12833 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12834 {
12835         struct sk_buff *msg;
12836
12837         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12838         if (!msg)
12839                 return;
12840
12841         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12842                 goto nla_put_failure;
12843
12844         cfg80211_send_cqm(msg, gfp);
12845         return;
12846
12847  nla_put_failure:
12848         nlmsg_free(msg);
12849 }
12850 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12851
12852 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12853                                      struct net_device *netdev, const u8 *bssid,
12854                                      const u8 *replay_ctr, gfp_t gfp)
12855 {
12856         struct sk_buff *msg;
12857         struct nlattr *rekey_attr;
12858         void *hdr;
12859
12860         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12861         if (!msg)
12862                 return;
12863
12864         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12865         if (!hdr) {
12866                 nlmsg_free(msg);
12867                 return;
12868         }
12869
12870         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12871             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12872             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12873                 goto nla_put_failure;
12874
12875         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12876         if (!rekey_attr)
12877                 goto nla_put_failure;
12878
12879         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12880                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12881                 goto nla_put_failure;
12882
12883         nla_nest_end(msg, rekey_attr);
12884
12885         genlmsg_end(msg, hdr);
12886
12887         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12888                                 NL80211_MCGRP_MLME, gfp);
12889         return;
12890
12891  nla_put_failure:
12892         genlmsg_cancel(msg, hdr);
12893         nlmsg_free(msg);
12894 }
12895
12896 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12897                                const u8 *replay_ctr, gfp_t gfp)
12898 {
12899         struct wireless_dev *wdev = dev->ieee80211_ptr;
12900         struct wiphy *wiphy = wdev->wiphy;
12901         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12902
12903         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12904         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12905 }
12906 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12907
12908 static void
12909 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12910                                struct net_device *netdev, int index,
12911                                const u8 *bssid, bool preauth, gfp_t gfp)
12912 {
12913         struct sk_buff *msg;
12914         struct nlattr *attr;
12915         void *hdr;
12916
12917         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12918         if (!msg)
12919                 return;
12920
12921         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12922         if (!hdr) {
12923                 nlmsg_free(msg);
12924                 return;
12925         }
12926
12927         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12928             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12929                 goto nla_put_failure;
12930
12931         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12932         if (!attr)
12933                 goto nla_put_failure;
12934
12935         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12936             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12937             (preauth &&
12938              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12939                 goto nla_put_failure;
12940
12941         nla_nest_end(msg, attr);
12942
12943         genlmsg_end(msg, hdr);
12944
12945         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12946                                 NL80211_MCGRP_MLME, gfp);
12947         return;
12948
12949  nla_put_failure:
12950         genlmsg_cancel(msg, hdr);
12951         nlmsg_free(msg);
12952 }
12953
12954 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12955                                      const u8 *bssid, bool preauth, gfp_t gfp)
12956 {
12957         struct wireless_dev *wdev = dev->ieee80211_ptr;
12958         struct wiphy *wiphy = wdev->wiphy;
12959         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12960
12961         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12962         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12963 }
12964 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12965
12966 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12967                                      struct net_device *netdev,
12968                                      struct cfg80211_chan_def *chandef,
12969                                      gfp_t gfp,
12970                                      enum nl80211_commands notif,
12971                                      u8 count)
12972 {
12973         struct sk_buff *msg;
12974         void *hdr;
12975
12976         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12977         if (!msg)
12978                 return;
12979
12980         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12981         if (!hdr) {
12982                 nlmsg_free(msg);
12983                 return;
12984         }
12985
12986         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12987                 goto nla_put_failure;
12988
12989         if (nl80211_send_chandef(msg, chandef))
12990                 goto nla_put_failure;
12991
12992         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12993             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12994                         goto nla_put_failure;
12995
12996         genlmsg_end(msg, hdr);
12997
12998         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12999                                 NL80211_MCGRP_MLME, gfp);
13000         return;
13001
13002  nla_put_failure:
13003         genlmsg_cancel(msg, hdr);
13004         nlmsg_free(msg);
13005 }
13006
13007 void cfg80211_ch_switch_notify(struct net_device *dev,
13008                                struct cfg80211_chan_def *chandef)
13009 {
13010         struct wireless_dev *wdev = dev->ieee80211_ptr;
13011         struct wiphy *wiphy = wdev->wiphy;
13012         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13013
13014         ASSERT_WDEV_LOCK(wdev);
13015
13016         trace_cfg80211_ch_switch_notify(dev, chandef);
13017
13018         wdev->chandef = *chandef;
13019         wdev->preset_chandef = *chandef;
13020         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13021                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13022 }
13023 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13024
13025 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13026                                        struct cfg80211_chan_def *chandef,
13027                                        u8 count)
13028 {
13029         struct wireless_dev *wdev = dev->ieee80211_ptr;
13030         struct wiphy *wiphy = wdev->wiphy;
13031         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13032
13033         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13034
13035         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13036                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13037 }
13038 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13039
13040 void
13041 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13042                      const struct cfg80211_chan_def *chandef,
13043                      enum nl80211_radar_event event,
13044                      struct net_device *netdev, gfp_t gfp)
13045 {
13046         struct sk_buff *msg;
13047         void *hdr;
13048
13049         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13050         if (!msg)
13051                 return;
13052
13053         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13054         if (!hdr) {
13055                 nlmsg_free(msg);
13056                 return;
13057         }
13058
13059         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13060                 goto nla_put_failure;
13061
13062         /* NOP and radar events don't need a netdev parameter */
13063         if (netdev) {
13064                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13065
13066                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13067                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13068                                       NL80211_ATTR_PAD))
13069                         goto nla_put_failure;
13070         }
13071
13072         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13073                 goto nla_put_failure;
13074
13075         if (nl80211_send_chandef(msg, chandef))
13076                 goto nla_put_failure;
13077
13078         genlmsg_end(msg, hdr);
13079
13080         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13081                                 NL80211_MCGRP_MLME, gfp);
13082         return;
13083
13084  nla_put_failure:
13085         genlmsg_cancel(msg, hdr);
13086         nlmsg_free(msg);
13087 }
13088
13089 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13090                            u64 cookie, bool acked, gfp_t gfp)
13091 {
13092         struct wireless_dev *wdev = dev->ieee80211_ptr;
13093         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13094         struct sk_buff *msg;
13095         void *hdr;
13096
13097         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13098
13099         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13100
13101         if (!msg)
13102                 return;
13103
13104         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13105         if (!hdr) {
13106                 nlmsg_free(msg);
13107                 return;
13108         }
13109
13110         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13111             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13112             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13113             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13114                               NL80211_ATTR_PAD) ||
13115             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13116                 goto nla_put_failure;
13117
13118         genlmsg_end(msg, hdr);
13119
13120         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13121                                 NL80211_MCGRP_MLME, gfp);
13122         return;
13123
13124  nla_put_failure:
13125         genlmsg_cancel(msg, hdr);
13126         nlmsg_free(msg);
13127 }
13128 EXPORT_SYMBOL(cfg80211_probe_status);
13129
13130 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13131                                  const u8 *frame, size_t len,
13132                                  int freq, int sig_dbm)
13133 {
13134         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13135         struct sk_buff *msg;
13136         void *hdr;
13137         struct cfg80211_beacon_registration *reg;
13138
13139         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13140
13141         spin_lock_bh(&rdev->beacon_registrations_lock);
13142         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13143                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13144                 if (!msg) {
13145                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13146                         return;
13147                 }
13148
13149                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13150                 if (!hdr)
13151                         goto nla_put_failure;
13152
13153                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13154                     (freq &&
13155                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13156                     (sig_dbm &&
13157                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13158                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13159                         goto nla_put_failure;
13160
13161                 genlmsg_end(msg, hdr);
13162
13163                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13164         }
13165         spin_unlock_bh(&rdev->beacon_registrations_lock);
13166         return;
13167
13168  nla_put_failure:
13169         spin_unlock_bh(&rdev->beacon_registrations_lock);
13170         if (hdr)
13171                 genlmsg_cancel(msg, hdr);
13172         nlmsg_free(msg);
13173 }
13174 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13175
13176 #ifdef CONFIG_PM
13177 static int cfg80211_net_detect_results(struct sk_buff *msg,
13178                                        struct cfg80211_wowlan_wakeup *wakeup)
13179 {
13180         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13181         struct nlattr *nl_results, *nl_match, *nl_freqs;
13182         int i, j;
13183
13184         nl_results = nla_nest_start(
13185                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13186         if (!nl_results)
13187                 return -EMSGSIZE;
13188
13189         for (i = 0; i < nd->n_matches; i++) {
13190                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13191
13192                 nl_match = nla_nest_start(msg, i);
13193                 if (!nl_match)
13194                         break;
13195
13196                 /* The SSID attribute is optional in nl80211, but for
13197                  * simplicity reasons it's always present in the
13198                  * cfg80211 structure.  If a driver can't pass the
13199                  * SSID, that needs to be changed.  A zero length SSID
13200                  * is still a valid SSID (wildcard), so it cannot be
13201                  * used for this purpose.
13202                  */
13203                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13204                             match->ssid.ssid)) {
13205                         nla_nest_cancel(msg, nl_match);
13206                         goto out;
13207                 }
13208
13209                 if (match->n_channels) {
13210                         nl_freqs = nla_nest_start(
13211                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13212                         if (!nl_freqs) {
13213                                 nla_nest_cancel(msg, nl_match);
13214                                 goto out;
13215                         }
13216
13217                         for (j = 0; j < match->n_channels; j++) {
13218                                 if (nla_put_u32(msg, j, match->channels[j])) {
13219                                         nla_nest_cancel(msg, nl_freqs);
13220                                         nla_nest_cancel(msg, nl_match);
13221                                         goto out;
13222                                 }
13223                         }
13224
13225                         nla_nest_end(msg, nl_freqs);
13226                 }
13227
13228                 nla_nest_end(msg, nl_match);
13229         }
13230
13231 out:
13232         nla_nest_end(msg, nl_results);
13233         return 0;
13234 }
13235
13236 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13237                                    struct cfg80211_wowlan_wakeup *wakeup,
13238                                    gfp_t gfp)
13239 {
13240         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13241         struct sk_buff *msg;
13242         void *hdr;
13243         int size = 200;
13244
13245         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13246
13247         if (wakeup)
13248                 size += wakeup->packet_present_len;
13249
13250         msg = nlmsg_new(size, gfp);
13251         if (!msg)
13252                 return;
13253
13254         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13255         if (!hdr)
13256                 goto free_msg;
13257
13258         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13259             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13260                               NL80211_ATTR_PAD))
13261                 goto free_msg;
13262
13263         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13264                                         wdev->netdev->ifindex))
13265                 goto free_msg;
13266
13267         if (wakeup) {
13268                 struct nlattr *reasons;
13269
13270                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13271                 if (!reasons)
13272                         goto free_msg;
13273
13274                 if (wakeup->disconnect &&
13275                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13276                         goto free_msg;
13277                 if (wakeup->magic_pkt &&
13278                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13279                         goto free_msg;
13280                 if (wakeup->gtk_rekey_failure &&
13281                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13282                         goto free_msg;
13283                 if (wakeup->eap_identity_req &&
13284                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13285                         goto free_msg;
13286                 if (wakeup->four_way_handshake &&
13287                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13288                         goto free_msg;
13289                 if (wakeup->rfkill_release &&
13290                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13291                         goto free_msg;
13292
13293                 if (wakeup->pattern_idx >= 0 &&
13294                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13295                                 wakeup->pattern_idx))
13296                         goto free_msg;
13297
13298                 if (wakeup->tcp_match &&
13299                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13300                         goto free_msg;
13301
13302                 if (wakeup->tcp_connlost &&
13303                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13304                         goto free_msg;
13305
13306                 if (wakeup->tcp_nomoretokens &&
13307                     nla_put_flag(msg,
13308                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13309                         goto free_msg;
13310
13311                 if (wakeup->packet) {
13312                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13313                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13314
13315                         if (!wakeup->packet_80211) {
13316                                 pkt_attr =
13317                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13318                                 len_attr =
13319                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13320                         }
13321
13322                         if (wakeup->packet_len &&
13323                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13324                                 goto free_msg;
13325
13326                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13327                                     wakeup->packet))
13328                                 goto free_msg;
13329                 }
13330
13331                 if (wakeup->net_detect &&
13332                     cfg80211_net_detect_results(msg, wakeup))
13333                                 goto free_msg;
13334
13335                 nla_nest_end(msg, reasons);
13336         }
13337
13338         genlmsg_end(msg, hdr);
13339
13340         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13341                                 NL80211_MCGRP_MLME, gfp);
13342         return;
13343
13344  free_msg:
13345         nlmsg_free(msg);
13346 }
13347 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13348 #endif
13349
13350 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13351                                 enum nl80211_tdls_operation oper,
13352                                 u16 reason_code, gfp_t gfp)
13353 {
13354         struct wireless_dev *wdev = dev->ieee80211_ptr;
13355         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13356         struct sk_buff *msg;
13357         void *hdr;
13358
13359         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13360                                          reason_code);
13361
13362         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13363         if (!msg)
13364                 return;
13365
13366         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13367         if (!hdr) {
13368                 nlmsg_free(msg);
13369                 return;
13370         }
13371
13372         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13373             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13374             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13375             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13376             (reason_code > 0 &&
13377              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13378                 goto nla_put_failure;
13379
13380         genlmsg_end(msg, hdr);
13381
13382         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13383                                 NL80211_MCGRP_MLME, gfp);
13384         return;
13385
13386  nla_put_failure:
13387         genlmsg_cancel(msg, hdr);
13388         nlmsg_free(msg);
13389 }
13390 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13391
13392 static int nl80211_netlink_notify(struct notifier_block * nb,
13393                                   unsigned long state,
13394                                   void *_notify)
13395 {
13396         struct netlink_notify *notify = _notify;
13397         struct cfg80211_registered_device *rdev;
13398         struct wireless_dev *wdev;
13399         struct cfg80211_beacon_registration *reg, *tmp;
13400
13401         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13402                 return NOTIFY_DONE;
13403
13404         rcu_read_lock();
13405
13406         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13407                 bool schedule_destroy_work = false;
13408                 bool schedule_scan_stop = false;
13409                 struct cfg80211_sched_scan_request *sched_scan_req =
13410                         rcu_dereference(rdev->sched_scan_req);
13411
13412                 if (sched_scan_req && notify->portid &&
13413                     sched_scan_req->owner_nlportid == notify->portid)
13414                         schedule_scan_stop = true;
13415
13416                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13417                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13418
13419                         if (wdev->owner_nlportid == notify->portid)
13420                                 schedule_destroy_work = true;
13421                 }
13422
13423                 spin_lock_bh(&rdev->beacon_registrations_lock);
13424                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13425                                          list) {
13426                         if (reg->nlportid == notify->portid) {
13427                                 list_del(&reg->list);
13428                                 kfree(reg);
13429                                 break;
13430                         }
13431                 }
13432                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13433
13434                 if (schedule_destroy_work) {
13435                         struct cfg80211_iface_destroy *destroy;
13436
13437                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13438                         if (destroy) {
13439                                 destroy->nlportid = notify->portid;
13440                                 spin_lock(&rdev->destroy_list_lock);
13441                                 list_add(&destroy->list, &rdev->destroy_list);
13442                                 spin_unlock(&rdev->destroy_list_lock);
13443                                 schedule_work(&rdev->destroy_work);
13444                         }
13445                 } else if (schedule_scan_stop) {
13446                         sched_scan_req->owner_nlportid = 0;
13447
13448                         if (rdev->ops->sched_scan_stop &&
13449                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13450                                 schedule_work(&rdev->sched_scan_stop_wk);
13451                 }
13452         }
13453
13454         rcu_read_unlock();
13455
13456         /*
13457          * It is possible that the user space process that is controlling the
13458          * indoor setting disappeared, so notify the regulatory core.
13459          */
13460         regulatory_netlink_notify(notify->portid);
13461         return NOTIFY_OK;
13462 }
13463
13464 static struct notifier_block nl80211_netlink_notifier = {
13465         .notifier_call = nl80211_netlink_notify,
13466 };
13467
13468 void cfg80211_ft_event(struct net_device *netdev,
13469                        struct cfg80211_ft_event_params *ft_event)
13470 {
13471         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13472         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13473         struct sk_buff *msg;
13474         void *hdr;
13475
13476         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13477
13478         if (!ft_event->target_ap)
13479                 return;
13480
13481         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13482         if (!msg)
13483                 return;
13484
13485         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13486         if (!hdr)
13487                 goto out;
13488
13489         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13490             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13491             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13492                 goto out;
13493
13494         if (ft_event->ies &&
13495             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13496                 goto out;
13497         if (ft_event->ric_ies &&
13498             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13499                     ft_event->ric_ies))
13500                 goto out;
13501
13502         genlmsg_end(msg, hdr);
13503
13504         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13505                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13506         return;
13507  out:
13508         nlmsg_free(msg);
13509 }
13510 EXPORT_SYMBOL(cfg80211_ft_event);
13511
13512 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13513 {
13514         struct cfg80211_registered_device *rdev;
13515         struct sk_buff *msg;
13516         void *hdr;
13517         u32 nlportid;
13518
13519         rdev = wiphy_to_rdev(wdev->wiphy);
13520         if (!rdev->crit_proto_nlportid)
13521                 return;
13522
13523         nlportid = rdev->crit_proto_nlportid;
13524         rdev->crit_proto_nlportid = 0;
13525
13526         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13527         if (!msg)
13528                 return;
13529
13530         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13531         if (!hdr)
13532                 goto nla_put_failure;
13533
13534         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13535             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13536                               NL80211_ATTR_PAD))
13537                 goto nla_put_failure;
13538
13539         genlmsg_end(msg, hdr);
13540
13541         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13542         return;
13543
13544  nla_put_failure:
13545         if (hdr)
13546                 genlmsg_cancel(msg, hdr);
13547         nlmsg_free(msg);
13548
13549 }
13550 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13551
13552 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13553 {
13554         struct wiphy *wiphy = wdev->wiphy;
13555         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13556         struct sk_buff *msg;
13557         void *hdr;
13558
13559         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13560         if (!msg)
13561                 return;
13562
13563         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13564         if (!hdr)
13565                 goto out;
13566
13567         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13568             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13569             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13570                               NL80211_ATTR_PAD))
13571                 goto out;
13572
13573         genlmsg_end(msg, hdr);
13574
13575         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13576                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13577         return;
13578  out:
13579         nlmsg_free(msg);
13580 }
13581
13582 /* initialisation/exit functions */
13583
13584 int nl80211_init(void)
13585 {
13586         int err;
13587
13588         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13589                                                    nl80211_mcgrps);
13590         if (err)
13591                 return err;
13592
13593         err = netlink_register_notifier(&nl80211_netlink_notifier);
13594         if (err)
13595                 goto err_out;
13596
13597         return 0;
13598  err_out:
13599         genl_unregister_family(&nl80211_fam);
13600         return err;
13601 }
13602
13603 void nl80211_exit(void)
13604 {
13605         netlink_unregister_notifier(&nl80211_netlink_notifier);
13606         genl_unregister_family(&nl80211_fam);
13607 }