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 };
 407
 408 /* policy for the key attributes */
 409 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 410         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 411         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 412         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 413         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 414         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 415         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 416         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 417         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 418 };
 419
 420 /* policy for the key default flags */
 421 static const struct nla_policy
 422 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 423         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 424         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 425 };
 426
 427 /* policy for WoWLAN attributes */
 428 static const struct nla_policy
 429 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 430         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 431         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 432         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 433         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 434         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 435         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 439         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 440 };
 441
 442 static const struct nla_policy
 443 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 444         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 445         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 446         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 447         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 448         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 449         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 450         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 451                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 452         },
 453         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 454                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 455         },
 456         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 457         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 458         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 459 };
 460
 461 /* policy for coalesce rule attributes */
 462 static const struct nla_policy
 463 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 464         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 465         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 466         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 467 };
 468
 469 /* policy for GTK rekey offload attributes */
 470 static const struct nla_policy
 471 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 472         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 473         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 474         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 475 };
 476
 477 static const struct nla_policy
 478 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 479         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 480                                                  .len = IEEE80211_MAX_SSID_LEN },
 481         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 482 };
 483
 484 static const struct nla_policy
 485 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 486         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 487         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 488 };
 489
 490 static const struct nla_policy
 491 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 492         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 493         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 494         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 495                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 496         },
 497 };
 498
 499 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 500                                      struct netlink_callback *cb,
 501                                      struct cfg80211_registered_device **rdev,
 502                                      struct wireless_dev **wdev)
 503 {
 504         int err;
 505
 506         rtnl_lock();
 507
 508         if (!cb->args[0]) {
 509                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 510                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 511                                   nl80211_policy);
 512                 if (err)
 513                         goto out_unlock;
 514
 515                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 516                                                    nl80211_fam.attrbuf);
 517                 if (IS_ERR(*wdev)) {
 518                         err = PTR_ERR(*wdev);
 519                         goto out_unlock;
 520                 }
 521                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 522                 /* 0 is the first index - add 1 to parse only once */
 523                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 524                 cb->args[1] = (*wdev)->identifier;
 525         } else {
 526                 /* subtract the 1 again here */
 527                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 528                 struct wireless_dev *tmp;
 529
 530                 if (!wiphy) {
 531                         err = -ENODEV;
 532                         goto out_unlock;
 533                 }
 534                 *rdev = wiphy_to_rdev(wiphy);
 535                 *wdev = NULL;
 536
 537                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 538                         if (tmp->identifier == cb->args[1]) {
 539                                 *wdev = tmp;
 540                                 break;
 541                         }
 542                 }
 543
 544                 if (!*wdev) {
 545                         err = -ENODEV;
 546                         goto out_unlock;
 547                 }
 548         }
 549
 550         return 0;
 551  out_unlock:
 552         rtnl_unlock();
 553         return err;
 554 }
 555
 556 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 557 {
 558         rtnl_unlock();
 559 }
 560
 561 /* IE validation */
 562 static bool is_valid_ie_attr(const struct nlattr *attr)
 563 {
 564         const u8 *pos;
 565         int len;
 566
 567         if (!attr)
 568                 return true;
 569
 570         pos = nla_data(attr);
 571         len = nla_len(attr);
 572
 573         while (len) {
 574                 u8 elemlen;
 575
 576                 if (len < 2)
 577                         return false;
 578                 len -= 2;
 579
 580                 elemlen = pos[1];
 581                 if (elemlen > len)
 582                         return false;
 583
 584                 len -= elemlen;
 585                 pos += 2 + elemlen;
 586         }
 587
 588         return true;
 589 }
 590
 591 /* message building helper */
 592 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 593                                    int flags, u8 cmd)
 594 {
 595         /* since there is no private header just add the generic one */
 596         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 597 }
 598
 599 static int nl80211_msg_put_channel(struct sk_buff *msg,
 600                                    struct ieee80211_channel *chan,
 601                                    bool large)
 602 {
 603         /* Some channels must be completely excluded from the
 604          * list to protect old user-space tools from breaking
 605          */
 606         if (!large && chan->flags &
 607             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 608                 return 0;
 609
 610         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 611                         chan->center_freq))
 612                 goto nla_put_failure;
 613
 614         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 615             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 616                 goto nla_put_failure;
 617         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 618                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 619                         goto nla_put_failure;
 620                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 621                         goto nla_put_failure;
 622         }
 623         if (chan->flags & IEEE80211_CHAN_RADAR) {
 624                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 625                         goto nla_put_failure;
 626                 if (large) {
 627                         u32 time;
 628
 629                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 630
 631                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 632                                         chan->dfs_state))
 633                                 goto nla_put_failure;
 634                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 635                                         time))
 636                                 goto nla_put_failure;
 637                         if (nla_put_u32(msg,
 638                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 639                                         chan->dfs_cac_ms))
 640                                 goto nla_put_failure;
 641                 }
 642         }
 643
 644         if (large) {
 645                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 646                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 647                         goto nla_put_failure;
 648                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 649                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 650                         goto nla_put_failure;
 651                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 652                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 653                         goto nla_put_failure;
 654                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 655                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 656                         goto nla_put_failure;
 657                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 658                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 659                         goto nla_put_failure;
 660                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 661                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 662                         goto nla_put_failure;
 663                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 664                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 665                         goto nla_put_failure;
 666                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 667                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 668                         goto nla_put_failure;
 669         }
 670
 671         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 672                         DBM_TO_MBM(chan->max_power)))
 673                 goto nla_put_failure;
 674
 675         return 0;
 676
 677  nla_put_failure:
 678         return -ENOBUFS;
 679 }
 680
 681 /* netlink command implementations */
 682
 683 struct key_parse {
 684         struct key_params p;
 685         int idx;
 686         int type;
 687         bool def, defmgmt;
 688         bool def_uni, def_multi;
 689 };
 690
 691 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 692 {
 693         struct nlattr *tb[NL80211_KEY_MAX + 1];
 694         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 695                                    nl80211_key_policy);
 696         if (err)
 697                 return err;
 698
 699         k->def = !!tb[NL80211_KEY_DEFAULT];
 700         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 701
 702         if (k->def) {
 703                 k->def_uni = true;
 704                 k->def_multi = true;
 705         }
 706         if (k->defmgmt)
 707                 k->def_multi = true;
 708
 709         if (tb[NL80211_KEY_IDX])
 710                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 711
 712         if (tb[NL80211_KEY_DATA]) {
 713                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 714                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 715         }
 716
 717         if (tb[NL80211_KEY_SEQ]) {
 718                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 719                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 720         }
 721
 722         if (tb[NL80211_KEY_CIPHER])
 723                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 724
 725         if (tb[NL80211_KEY_TYPE]) {
 726                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 727                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 728                         return -EINVAL;
 729         }
 730
 731         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 732                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 733                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 734                                        tb[NL80211_KEY_DEFAULT_TYPES],
 735                                        nl80211_key_default_policy);
 736                 if (err)
 737                         return err;
 738
 739                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 740                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 741         }
 742
 743         return 0;
 744 }
 745
 746 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 747 {
 748         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 749                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 750                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 751         }
 752
 753         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 754                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 755                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 756         }
 757
 758         if (info->attrs[NL80211_ATTR_KEY_IDX])
 759                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 760
 761         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 762                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 763
 764         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 765         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 766
 767         if (k->def) {
 768                 k->def_uni = true;
 769                 k->def_multi = true;
 770         }
 771         if (k->defmgmt)
 772                 k->def_multi = true;
 773
 774         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 775                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 776                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 777                         return -EINVAL;
 778         }
 779
 780         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 781                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 782                 int err = nla_parse_nested(
 783                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 784                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 785                                 nl80211_key_default_policy);
 786                 if (err)
 787                         return err;
 788
 789                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 790                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 791         }
 792
 793         return 0;
 794 }
 795
 796 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 797 {
 798         int err;
 799
 800         memset(k, 0, sizeof(*k));
 801         k->idx = -1;
 802         k->type = -1;
 803
 804         if (info->attrs[NL80211_ATTR_KEY])
 805                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 806         else
 807                 err = nl80211_parse_key_old(info, k);
 808
 809         if (err)
 810                 return err;
 811
 812         if (k->def && k->defmgmt)
 813                 return -EINVAL;
 814
 815         if (k->defmgmt) {
 816                 if (k->def_uni || !k->def_multi)
 817                         return -EINVAL;
 818         }
 819
 820         if (k->idx != -1) {
 821                 if (k->defmgmt) {
 822                         if (k->idx < 4 || k->idx > 5)
 823                                 return -EINVAL;
 824                 } else if (k->def) {
 825                         if (k->idx < 0 || k->idx > 3)
 826                                 return -EINVAL;
 827                 } else {
 828                         if (k->idx < 0 || k->idx > 5)
 829                                 return -EINVAL;
 830                 }
 831         }
 832
 833         return 0;
 834 }
 835
 836 static struct cfg80211_cached_keys *
 837 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 838                        struct nlattr *keys, bool *no_ht)
 839 {
 840         struct key_parse parse;
 841         struct nlattr *key;
 842         struct cfg80211_cached_keys *result;
 843         int rem, err, def = 0;
 844
 845         result = kzalloc(sizeof(*result), GFP_KERNEL);
 846         if (!result)
 847                 return ERR_PTR(-ENOMEM);
 848
 849         result->def = -1;
 850         result->defmgmt = -1;
 851
 852         nla_for_each_nested(key, keys, rem) {
 853                 memset(&parse, 0, sizeof(parse));
 854                 parse.idx = -1;
 855
 856                 err = nl80211_parse_key_new(key, &parse);
 857                 if (err)
 858                         goto error;
 859                 err = -EINVAL;
 860                 if (!parse.p.key)
 861                         goto error;
 862                 if (parse.idx < 0 || parse.idx > 4)
 863                         goto error;
 864                 if (parse.def) {
 865                         if (def)
 866                                 goto error;
 867                         def = 1;
 868                         result->def = parse.idx;
 869                         if (!parse.def_uni || !parse.def_multi)
 870                                 goto error;
 871                 } else if (parse.defmgmt)
 872                         goto error;
 873                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 874                                                      parse.idx, false, NULL);
 875                 if (err)
 876                         goto error;
 877                 result->params[parse.idx].cipher = parse.p.cipher;
 878                 result->params[parse.idx].key_len = parse.p.key_len;
 879                 result->params[parse.idx].key = result->data[parse.idx];
 880                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 881
 882                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 883                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 884                         if (no_ht)
 885                                 *no_ht = true;
 886                 }
 887         }
 888
 889         return result;
 890  error:
 891         kfree(result);
 892         return ERR_PTR(err);
 893 }
 894
 895 static int nl80211_key_allowed(struct wireless_dev *wdev)
 896 {
 897         ASSERT_WDEV_LOCK(wdev);
 898
 899         switch (wdev->iftype) {
 900         case NL80211_IFTYPE_AP:
 901         case NL80211_IFTYPE_AP_VLAN:
 902         case NL80211_IFTYPE_P2P_GO:
 903         case NL80211_IFTYPE_MESH_POINT:
 904                 break;
 905         case NL80211_IFTYPE_ADHOC:
 906         case NL80211_IFTYPE_STATION:
 907         case NL80211_IFTYPE_P2P_CLIENT:
 908                 if (!wdev->current_bss)
 909                         return -ENOLINK;
 910                 break;
 911         case NL80211_IFTYPE_UNSPECIFIED:
 912         case NL80211_IFTYPE_OCB:
 913         case NL80211_IFTYPE_MONITOR:
 914         case NL80211_IFTYPE_P2P_DEVICE:
 915         case NL80211_IFTYPE_WDS:
 916         case NUM_NL80211_IFTYPES:
 917                 return -EINVAL;
 918         }
 919
 920         return 0;
 921 }
 922
 923 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 924                                                         struct nlattr *tb)
 925 {
 926         struct ieee80211_channel *chan;
 927
 928         if (tb == NULL)
 929                 return NULL;
 930         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 931         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 932                 return NULL;
 933         return chan;
 934 }
 935
 936 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 937 {
 938         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 939         int i;
 940
 941         if (!nl_modes)
 942                 goto nla_put_failure;
 943
 944         i = 0;
 945         while (ifmodes) {
 946                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 947                         goto nla_put_failure;
 948                 ifmodes >>= 1;
 949                 i++;
 950         }
 951
 952         nla_nest_end(msg, nl_modes);
 953         return 0;
 954
 955 nla_put_failure:
 956         return -ENOBUFS;
 957 }
 958
 959 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 960                                           struct sk_buff *msg,
 961                                           bool large)
 962 {
 963         struct nlattr *nl_combis;
 964         int i, j;
 965
 966         nl_combis = nla_nest_start(msg,
 967                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 968         if (!nl_combis)
 969                 goto nla_put_failure;
 970
 971         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 972                 const struct ieee80211_iface_combination *c;
 973                 struct nlattr *nl_combi, *nl_limits;
 974
 975                 c = &wiphy->iface_combinations[i];
 976
 977                 nl_combi = nla_nest_start(msg, i + 1);
 978                 if (!nl_combi)
 979                         goto nla_put_failure;
 980
 981                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 982                 if (!nl_limits)
 983                         goto nla_put_failure;
 984
 985                 for (j = 0; j < c->n_limits; j++) {
 986                         struct nlattr *nl_limit;
 987
 988                         nl_limit = nla_nest_start(msg, j + 1);
 989                         if (!nl_limit)
 990                                 goto nla_put_failure;
 991                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 992                                         c->limits[j].max))
 993                                 goto nla_put_failure;
 994                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 995                                                 c->limits[j].types))
 996                                 goto nla_put_failure;
 997                         nla_nest_end(msg, nl_limit);
 998                 }
 999
1000                 nla_nest_end(msg, nl_limits);
1001
1002                 if (c->beacon_int_infra_match &&
1003                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1004                         goto nla_put_failure;
1005                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1006                                 c->num_different_channels) ||
1007                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1008                                 c->max_interfaces))
1009                         goto nla_put_failure;
1010                 if (large &&
1011                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1012                                 c->radar_detect_widths) ||
1013                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1014                                 c->radar_detect_regions)))
1015                         goto nla_put_failure;
1016
1017                 nla_nest_end(msg, nl_combi);
1018         }
1019
1020         nla_nest_end(msg, nl_combis);
1021
1022         return 0;
1023 nla_put_failure:
1024         return -ENOBUFS;
1025 }
1026
1027 #ifdef CONFIG_PM
1028 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1029                                         struct sk_buff *msg)
1030 {
1031         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1032         struct nlattr *nl_tcp;
1033
1034         if (!tcp)
1035                 return 0;
1036
1037         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1038         if (!nl_tcp)
1039                 return -ENOBUFS;
1040
1041         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1042                         tcp->data_payload_max))
1043                 return -ENOBUFS;
1044
1045         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1046                         tcp->data_payload_max))
1047                 return -ENOBUFS;
1048
1049         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1050                 return -ENOBUFS;
1051
1052         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1053                                 sizeof(*tcp->tok), tcp->tok))
1054                 return -ENOBUFS;
1055
1056         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1057                         tcp->data_interval_max))
1058                 return -ENOBUFS;
1059
1060         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1061                         tcp->wake_payload_max))
1062                 return -ENOBUFS;
1063
1064         nla_nest_end(msg, nl_tcp);
1065         return 0;
1066 }
1067
1068 static int nl80211_send_wowlan(struct sk_buff *msg,
1069                                struct cfg80211_registered_device *rdev,
1070                                bool large)
1071 {
1072         struct nlattr *nl_wowlan;
1073
1074         if (!rdev->wiphy.wowlan)
1075                 return 0;
1076
1077         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1078         if (!nl_wowlan)
1079                 return -ENOBUFS;
1080
1081         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1082              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1083             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1084              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1085             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1086              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1087             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1088              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1089             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1090              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1091             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1092              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1093             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1094              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1095             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1096              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1097                 return -ENOBUFS;
1098
1099         if (rdev->wiphy.wowlan->n_patterns) {
1100                 struct nl80211_pattern_support pat = {
1101                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1102                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1103                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1104                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1105                 };
1106
1107                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1108                             sizeof(pat), &pat))
1109                         return -ENOBUFS;
1110         }
1111
1112         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1113             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1114                         rdev->wiphy.wowlan->max_nd_match_sets))
1115                 return -ENOBUFS;
1116
1117         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1118                 return -ENOBUFS;
1119
1120         nla_nest_end(msg, nl_wowlan);
1121
1122         return 0;
1123 }
1124 #endif
1125
1126 static int nl80211_send_coalesce(struct sk_buff *msg,
1127                                  struct cfg80211_registered_device *rdev)
1128 {
1129         struct nl80211_coalesce_rule_support rule;
1130
1131         if (!rdev->wiphy.coalesce)
1132                 return 0;
1133
1134         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1135         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1136         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1137         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1138         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1139         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1140
1141         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1142                 return -ENOBUFS;
1143
1144         return 0;
1145 }
1146
1147 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1148                                       struct ieee80211_supported_band *sband)
1149 {
1150         struct nlattr *nl_rates, *nl_rate;
1151         struct ieee80211_rate *rate;
1152         int i;
1153
1154         /* add HT info */
1155         if (sband->ht_cap.ht_supported &&
1156             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1157                      sizeof(sband->ht_cap.mcs),
1158                      &sband->ht_cap.mcs) ||
1159              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1160                          sband->ht_cap.cap) ||
1161              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1162                         sband->ht_cap.ampdu_factor) ||
1163              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1164                         sband->ht_cap.ampdu_density)))
1165                 return -ENOBUFS;
1166
1167         /* add VHT info */
1168         if (sband->vht_cap.vht_supported &&
1169             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1170                      sizeof(sband->vht_cap.vht_mcs),
1171                      &sband->vht_cap.vht_mcs) ||
1172              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1173                          sband->vht_cap.cap)))
1174                 return -ENOBUFS;
1175
1176         /* add bitrates */
1177         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1178         if (!nl_rates)
1179                 return -ENOBUFS;
1180
1181         for (i = 0; i < sband->n_bitrates; i++) {
1182                 nl_rate = nla_nest_start(msg, i);
1183                 if (!nl_rate)
1184                         return -ENOBUFS;
1185
1186                 rate = &sband->bitrates[i];
1187                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1188                                 rate->bitrate))
1189                         return -ENOBUFS;
1190                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1191                     nla_put_flag(msg,
1192                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1193                         return -ENOBUFS;
1194
1195                 nla_nest_end(msg, nl_rate);
1196         }
1197
1198         nla_nest_end(msg, nl_rates);
1199
1200         return 0;
1201 }
1202
1203 static int
1204 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1205                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1206 {
1207         u16 stypes;
1208         struct nlattr *nl_ftypes, *nl_ifs;
1209         enum nl80211_iftype ift;
1210         int i;
1211
1212         if (!mgmt_stypes)
1213                 return 0;
1214
1215         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1216         if (!nl_ifs)
1217                 return -ENOBUFS;
1218
1219         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1220                 nl_ftypes = nla_nest_start(msg, ift);
1221                 if (!nl_ftypes)
1222                         return -ENOBUFS;
1223                 i = 0;
1224                 stypes = mgmt_stypes[ift].tx;
1225                 while (stypes) {
1226                         if ((stypes & 1) &&
1227                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1228                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1229                                 return -ENOBUFS;
1230                         stypes >>= 1;
1231                         i++;
1232                 }
1233                 nla_nest_end(msg, nl_ftypes);
1234         }
1235
1236         nla_nest_end(msg, nl_ifs);
1237
1238         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1239         if (!nl_ifs)
1240                 return -ENOBUFS;
1241
1242         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1243                 nl_ftypes = nla_nest_start(msg, ift);
1244                 if (!nl_ftypes)
1245                         return -ENOBUFS;
1246                 i = 0;
1247                 stypes = mgmt_stypes[ift].rx;
1248                 while (stypes) {
1249                         if ((stypes & 1) &&
1250                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1251                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1252                                 return -ENOBUFS;
1253                         stypes >>= 1;
1254                         i++;
1255                 }
1256                 nla_nest_end(msg, nl_ftypes);
1257         }
1258         nla_nest_end(msg, nl_ifs);
1259
1260         return 0;
1261 }
1262
1263 struct nl80211_dump_wiphy_state {
1264         s64 filter_wiphy;
1265         long start;
1266         long split_start, band_start, chan_start;
1267         bool split;
1268 };
1269
1270 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1271                               enum nl80211_commands cmd,
1272                               struct sk_buff *msg, u32 portid, u32 seq,
1273                               int flags, struct nl80211_dump_wiphy_state *state)
1274 {
1275         void *hdr;
1276         struct nlattr *nl_bands, *nl_band;
1277         struct nlattr *nl_freqs, *nl_freq;
1278         struct nlattr *nl_cmds;
1279         enum ieee80211_band band;
1280         struct ieee80211_channel *chan;
1281         int i;
1282         const struct ieee80211_txrx_stypes *mgmt_stypes =
1283                                 rdev->wiphy.mgmt_stypes;
1284         u32 features;
1285
1286         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1287         if (!hdr)
1288                 return -ENOBUFS;
1289
1290         if (WARN_ON(!state))
1291                 return -EINVAL;
1292
1293         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1294             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1295                            wiphy_name(&rdev->wiphy)) ||
1296             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1297                         cfg80211_rdev_list_generation))
1298                 goto nla_put_failure;
1299
1300         if (cmd != NL80211_CMD_NEW_WIPHY)
1301                 goto finish;
1302
1303         switch (state->split_start) {
1304         case 0:
1305                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1306                                rdev->wiphy.retry_short) ||
1307                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1308                                rdev->wiphy.retry_long) ||
1309                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1310                                 rdev->wiphy.frag_threshold) ||
1311                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1312                                 rdev->wiphy.rts_threshold) ||
1313                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1314                                rdev->wiphy.coverage_class) ||
1315                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1316                                rdev->wiphy.max_scan_ssids) ||
1317                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1318                                rdev->wiphy.max_sched_scan_ssids) ||
1319                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1320                                 rdev->wiphy.max_scan_ie_len) ||
1321                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1322                                 rdev->wiphy.max_sched_scan_ie_len) ||
1323                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1324                                rdev->wiphy.max_match_sets) ||
1325                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1326                                 rdev->wiphy.max_sched_scan_plans) ||
1327                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1328                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1329                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1330                                 rdev->wiphy.max_sched_scan_plan_iterations))
1331                         goto nla_put_failure;
1332
1333                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1334                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1335                         goto nla_put_failure;
1336                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1337                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1338                         goto nla_put_failure;
1339                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1340                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1341                         goto nla_put_failure;
1342                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1343                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1344                         goto nla_put_failure;
1345                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1346                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1347                         goto nla_put_failure;
1348                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1349                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1350                         goto nla_put_failure;
1351                 state->split_start++;
1352                 if (state->split)
1353                         break;
1354         case 1:
1355                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1356                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1357                             rdev->wiphy.cipher_suites))
1358                         goto nla_put_failure;
1359
1360                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1361                                rdev->wiphy.max_num_pmkids))
1362                         goto nla_put_failure;
1363
1364                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1365                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1366                         goto nla_put_failure;
1367
1368                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1369                                 rdev->wiphy.available_antennas_tx) ||
1370                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1371                                 rdev->wiphy.available_antennas_rx))
1372                         goto nla_put_failure;
1373
1374                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1375                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1376                                 rdev->wiphy.probe_resp_offload))
1377                         goto nla_put_failure;
1378
1379                 if ((rdev->wiphy.available_antennas_tx ||
1380                      rdev->wiphy.available_antennas_rx) &&
1381                     rdev->ops->get_antenna) {
1382                         u32 tx_ant = 0, rx_ant = 0;
1383                         int res;
1384                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1385                         if (!res) {
1386                                 if (nla_put_u32(msg,
1387                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1388                                                 tx_ant) ||
1389                                     nla_put_u32(msg,
1390                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1391                                                 rx_ant))
1392                                         goto nla_put_failure;
1393                         }
1394                 }
1395
1396                 state->split_start++;
1397                 if (state->split)
1398                         break;
1399         case 2:
1400                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1401                                         rdev->wiphy.interface_modes))
1402                                 goto nla_put_failure;
1403                 state->split_start++;
1404                 if (state->split)
1405                         break;
1406         case 3:
1407                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1408                 if (!nl_bands)
1409                         goto nla_put_failure;
1410
1411                 for (band = state->band_start;
1412                      band < IEEE80211_NUM_BANDS; band++) {
1413                         struct ieee80211_supported_band *sband;
1414
1415                         sband = rdev->wiphy.bands[band];
1416
1417                         if (!sband)
1418                                 continue;
1419
1420                         nl_band = nla_nest_start(msg, band);
1421                         if (!nl_band)
1422                                 goto nla_put_failure;
1423
1424                         switch (state->chan_start) {
1425                         case 0:
1426                                 if (nl80211_send_band_rateinfo(msg, sband))
1427                                         goto nla_put_failure;
1428                                 state->chan_start++;
1429                                 if (state->split)
1430                                         break;
1431                         default:
1432                                 /* add frequencies */
1433                                 nl_freqs = nla_nest_start(
1434                                         msg, NL80211_BAND_ATTR_FREQS);
1435                                 if (!nl_freqs)
1436                                         goto nla_put_failure;
1437
1438                                 for (i = state->chan_start - 1;
1439                                      i < sband->n_channels;
1440                                      i++) {
1441                                         nl_freq = nla_nest_start(msg, i);
1442                                         if (!nl_freq)
1443                                                 goto nla_put_failure;
1444
1445                                         chan = &sband->channels[i];
1446
1447                                         if (nl80211_msg_put_channel(
1448                                                         msg, chan,
1449                                                         state->split))
1450                                                 goto nla_put_failure;
1451
1452                                         nla_nest_end(msg, nl_freq);
1453                                         if (state->split)
1454                                                 break;
1455                                 }
1456                                 if (i < sband->n_channels)
1457                                         state->chan_start = i + 2;
1458                                 else
1459                                         state->chan_start = 0;
1460                                 nla_nest_end(msg, nl_freqs);
1461                         }
1462
1463                         nla_nest_end(msg, nl_band);
1464
1465                         if (state->split) {
1466                                 /* start again here */
1467                                 if (state->chan_start)
1468                                         band--;
1469                                 break;
1470                         }
1471                 }
1472                 nla_nest_end(msg, nl_bands);
1473
1474                 if (band < IEEE80211_NUM_BANDS)
1475                         state->band_start = band + 1;
1476                 else
1477                         state->band_start = 0;
1478
1479                 /* if bands & channels are done, continue outside */
1480                 if (state->band_start == 0 && state->chan_start == 0)
1481                         state->split_start++;
1482                 if (state->split)
1483                         break;
1484         case 4:
1485                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1486                 if (!nl_cmds)
1487                         goto nla_put_failure;
1488
1489                 i = 0;
1490 #define CMD(op, n)                                                      \
1491                  do {                                                   \
1492                         if (rdev->ops->op) {                            \
1493                                 i++;                                    \
1494                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1495                                         goto nla_put_failure;           \
1496                         }                                               \
1497                 } while (0)
1498
1499                 CMD(add_virtual_intf, NEW_INTERFACE);
1500                 CMD(change_virtual_intf, SET_INTERFACE);
1501                 CMD(add_key, NEW_KEY);
1502                 CMD(start_ap, START_AP);
1503                 CMD(add_station, NEW_STATION);
1504                 CMD(add_mpath, NEW_MPATH);
1505                 CMD(update_mesh_config, SET_MESH_CONFIG);
1506                 CMD(change_bss, SET_BSS);
1507                 CMD(auth, AUTHENTICATE);
1508                 CMD(assoc, ASSOCIATE);
1509                 CMD(deauth, DEAUTHENTICATE);
1510                 CMD(disassoc, DISASSOCIATE);
1511                 CMD(join_ibss, JOIN_IBSS);
1512                 CMD(join_mesh, JOIN_MESH);
1513                 CMD(set_pmksa, SET_PMKSA);
1514                 CMD(del_pmksa, DEL_PMKSA);
1515                 CMD(flush_pmksa, FLUSH_PMKSA);
1516                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1517                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1518                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1519                 CMD(mgmt_tx, FRAME);
1520                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1521                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1522                         i++;
1523                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1524                                 goto nla_put_failure;
1525                 }
1526                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1527                     rdev->ops->join_mesh) {
1528                         i++;
1529                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1530                                 goto nla_put_failure;
1531                 }
1532                 CMD(set_wds_peer, SET_WDS_PEER);
1533                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1534                         CMD(tdls_mgmt, TDLS_MGMT);
1535                         CMD(tdls_oper, TDLS_OPER);
1536                 }
1537                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1538                         CMD(sched_scan_start, START_SCHED_SCAN);
1539                 CMD(probe_client, PROBE_CLIENT);
1540                 CMD(set_noack_map, SET_NOACK_MAP);
1541                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1542                         i++;
1543                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1544                                 goto nla_put_failure;
1545                 }
1546                 CMD(start_p2p_device, START_P2P_DEVICE);
1547                 CMD(set_mcast_rate, SET_MCAST_RATE);
1548 #ifdef CONFIG_NL80211_TESTMODE
1549                 CMD(testmode_cmd, TESTMODE);
1550 #endif
1551                 if (state->split) {
1552                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1553                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1554                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1555                                 CMD(channel_switch, CHANNEL_SWITCH);
1556                         CMD(set_qos_map, SET_QOS_MAP);
1557                         if (rdev->wiphy.features &
1558                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1559                                 CMD(add_tx_ts, ADD_TX_TS);
1560                 }
1561                 /* add into the if now */
1562 #undef CMD
1563
1564                 if (rdev->ops->connect || rdev->ops->auth) {
1565                         i++;
1566                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1567                                 goto nla_put_failure;
1568                 }
1569
1570                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1571                         i++;
1572                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1573                                 goto nla_put_failure;
1574                 }
1575
1576                 nla_nest_end(msg, nl_cmds);
1577                 state->split_start++;
1578                 if (state->split)
1579                         break;
1580         case 5:
1581                 if (rdev->ops->remain_on_channel &&
1582                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1583                     nla_put_u32(msg,
1584                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1585                                 rdev->wiphy.max_remain_on_channel_duration))
1586                         goto nla_put_failure;
1587
1588                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1589                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1590                         goto nla_put_failure;
1591
1592                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1593                         goto nla_put_failure;
1594                 state->split_start++;
1595                 if (state->split)
1596                         break;
1597         case 6:
1598 #ifdef CONFIG_PM
1599                 if (nl80211_send_wowlan(msg, rdev, state->split))
1600                         goto nla_put_failure;
1601                 state->split_start++;
1602                 if (state->split)
1603                         break;
1604 #else
1605                 state->split_start++;
1606 #endif
1607         case 7:
1608                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1609                                         rdev->wiphy.software_iftypes))
1610                         goto nla_put_failure;
1611
1612                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1613                                                    state->split))
1614                         goto nla_put_failure;
1615
1616                 state->split_start++;
1617                 if (state->split)
1618                         break;
1619         case 8:
1620                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1621                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1622                                 rdev->wiphy.ap_sme_capa))
1623                         goto nla_put_failure;
1624
1625                 features = rdev->wiphy.features;
1626                 /*
1627                  * We can only add the per-channel limit information if the
1628                  * dump is split, otherwise it makes it too big. Therefore
1629                  * only advertise it in that case.
1630                  */
1631                 if (state->split)
1632                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1633                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1634                         goto nla_put_failure;
1635
1636                 if (rdev->wiphy.ht_capa_mod_mask &&
1637                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1638                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1639                             rdev->wiphy.ht_capa_mod_mask))
1640                         goto nla_put_failure;
1641
1642                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1643                     rdev->wiphy.max_acl_mac_addrs &&
1644                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1645                                 rdev->wiphy.max_acl_mac_addrs))
1646                         goto nla_put_failure;
1647
1648                 /*
1649                  * Any information below this point is only available to
1650                  * applications that can deal with it being split. This
1651                  * helps ensure that newly added capabilities don't break
1652                  * older tools by overrunning their buffers.
1653                  *
1654                  * We still increment split_start so that in the split
1655                  * case we'll continue with more data in the next round,
1656                  * but break unconditionally so unsplit data stops here.
1657                  */
1658                 state->split_start++;
1659                 break;
1660         case 9:
1661                 if (rdev->wiphy.extended_capabilities &&
1662                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1663                              rdev->wiphy.extended_capabilities_len,
1664                              rdev->wiphy.extended_capabilities) ||
1665                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1666                              rdev->wiphy.extended_capabilities_len,
1667                              rdev->wiphy.extended_capabilities_mask)))
1668                         goto nla_put_failure;
1669
1670                 if (rdev->wiphy.vht_capa_mod_mask &&
1671                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1672                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1673                             rdev->wiphy.vht_capa_mod_mask))
1674                         goto nla_put_failure;
1675
1676                 state->split_start++;
1677                 break;
1678         case 10:
1679                 if (nl80211_send_coalesce(msg, rdev))
1680                         goto nla_put_failure;
1681
1682                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1683                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1684                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1685                         goto nla_put_failure;
1686
1687                 if (rdev->wiphy.max_ap_assoc_sta &&
1688                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1689                                 rdev->wiphy.max_ap_assoc_sta))
1690                         goto nla_put_failure;
1691
1692                 state->split_start++;
1693                 break;
1694         case 11:
1695                 if (rdev->wiphy.n_vendor_commands) {
1696                         const struct nl80211_vendor_cmd_info *info;
1697                         struct nlattr *nested;
1698
1699                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1700                         if (!nested)
1701                                 goto nla_put_failure;
1702
1703                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1704                                 info = &rdev->wiphy.vendor_commands[i].info;
1705                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1706                                         goto nla_put_failure;
1707                         }
1708                         nla_nest_end(msg, nested);
1709                 }
1710
1711                 if (rdev->wiphy.n_vendor_events) {
1712                         const struct nl80211_vendor_cmd_info *info;
1713                         struct nlattr *nested;
1714
1715                         nested = nla_nest_start(msg,
1716                                                 NL80211_ATTR_VENDOR_EVENTS);
1717                         if (!nested)
1718                                 goto nla_put_failure;
1719
1720                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1721                                 info = &rdev->wiphy.vendor_events[i];
1722                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1723                                         goto nla_put_failure;
1724                         }
1725                         nla_nest_end(msg, nested);
1726                 }
1727                 state->split_start++;
1728                 break;
1729         case 12:
1730                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1731                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1732                                rdev->wiphy.max_num_csa_counters))
1733                         goto nla_put_failure;
1734
1735                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1736                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1737                         goto nla_put_failure;
1738
1739                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1740                             sizeof(rdev->wiphy.ext_features),
1741                             rdev->wiphy.ext_features))
1742                         goto nla_put_failure;
1743
1744                 if (rdev->wiphy.bss_select_support) {
1745                         struct nlattr *nested;
1746                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1747
1748                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1749                         if (!nested)
1750                                 goto nla_put_failure;
1751
1752                         i = 0;
1753                         while (bss_select_support) {
1754                                 if ((bss_select_support & 1) &&
1755                                     nla_put_flag(msg, i))
1756                                         goto nla_put_failure;
1757                                 i++;
1758                                 bss_select_support >>= 1;
1759                         }
1760                         nla_nest_end(msg, nested);
1761                 }
1762
1763                 /* done */
1764                 state->split_start = 0;
1765                 break;
1766         }
1767  finish:
1768         genlmsg_end(msg, hdr);
1769         return 0;
1770
1771  nla_put_failure:
1772         genlmsg_cancel(msg, hdr);
1773         return -EMSGSIZE;
1774 }
1775
1776 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1777                                     struct netlink_callback *cb,
1778                                     struct nl80211_dump_wiphy_state *state)
1779 {
1780         struct nlattr **tb = nl80211_fam.attrbuf;
1781         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1782                               tb, nl80211_fam.maxattr, nl80211_policy);
1783         /* ignore parse errors for backward compatibility */
1784         if (ret)
1785                 return 0;
1786
1787         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1788         if (tb[NL80211_ATTR_WIPHY])
1789                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1790         if (tb[NL80211_ATTR_WDEV])
1791                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1792         if (tb[NL80211_ATTR_IFINDEX]) {
1793                 struct net_device *netdev;
1794                 struct cfg80211_registered_device *rdev;
1795                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1796
1797                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1798                 if (!netdev)
1799                         return -ENODEV;
1800                 if (netdev->ieee80211_ptr) {
1801                         rdev = wiphy_to_rdev(
1802                                 netdev->ieee80211_ptr->wiphy);
1803                         state->filter_wiphy = rdev->wiphy_idx;
1804                 }
1805         }
1806
1807         return 0;
1808 }
1809
1810 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1811 {
1812         int idx = 0, ret;
1813         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1814         struct cfg80211_registered_device *rdev;
1815
1816         rtnl_lock();
1817         if (!state) {
1818                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1819                 if (!state) {
1820                         rtnl_unlock();
1821                         return -ENOMEM;
1822                 }
1823                 state->filter_wiphy = -1;
1824                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1825                 if (ret) {
1826                         kfree(state);
1827                         rtnl_unlock();
1828                         return ret;
1829                 }
1830                 cb->args[0] = (long)state;
1831         }
1832
1833         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1834                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1835                         continue;
1836                 if (++idx <= state->start)
1837                         continue;
1838                 if (state->filter_wiphy != -1 &&
1839                     state->filter_wiphy != rdev->wiphy_idx)
1840                         continue;
1841                 /* attempt to fit multiple wiphy data chunks into the skb */
1842                 do {
1843                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1844                                                  skb,
1845                                                  NETLINK_CB(cb->skb).portid,
1846                                                  cb->nlh->nlmsg_seq,
1847                                                  NLM_F_MULTI, state);
1848                         if (ret < 0) {
1849                                 /*
1850                                  * If sending the wiphy data didn't fit (ENOBUFS
1851                                  * or EMSGSIZE returned), this SKB is still
1852                                  * empty (so it's not too big because another
1853                                  * wiphy dataset is already in the skb) and
1854                                  * we've not tried to adjust the dump allocation
1855                                  * yet ... then adjust the alloc size to be
1856                                  * bigger, and return 1 but with the empty skb.
1857                                  * This results in an empty message being RX'ed
1858                                  * in userspace, but that is ignored.
1859                                  *
1860                                  * We can then retry with the larger buffer.
1861                                  */
1862                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1863                                     !skb->len && !state->split &&
1864                                     cb->min_dump_alloc < 4096) {
1865                                         cb->min_dump_alloc = 4096;
1866                                         state->split_start = 0;
1867                                         rtnl_unlock();
1868                                         return 1;
1869                                 }
1870                                 idx--;
1871                                 break;
1872                         }
1873                 } while (state->split_start > 0);
1874                 break;
1875         }
1876         rtnl_unlock();
1877
1878         state->start = idx;
1879
1880         return skb->len;
1881 }
1882
1883 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1884 {
1885         kfree((void *)cb->args[0]);
1886         return 0;
1887 }
1888
1889 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1890 {
1891         struct sk_buff *msg;
1892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1893         struct nl80211_dump_wiphy_state state = {};
1894
1895         msg = nlmsg_new(4096, GFP_KERNEL);
1896         if (!msg)
1897                 return -ENOMEM;
1898
1899         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1900                                info->snd_portid, info->snd_seq, 0,
1901                                &state) < 0) {
1902                 nlmsg_free(msg);
1903                 return -ENOBUFS;
1904         }
1905
1906         return genlmsg_reply(msg, info);
1907 }
1908
1909 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1910         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1911         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1912         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1913         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1914         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1915 };
1916
1917 static int parse_txq_params(struct nlattr *tb[],
1918                             struct ieee80211_txq_params *txq_params)
1919 {
1920         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1921             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1922             !tb[NL80211_TXQ_ATTR_AIFS])
1923                 return -EINVAL;
1924
1925         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1926         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1927         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1928         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1929         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1930
1931         if (txq_params->ac >= NL80211_NUM_ACS)
1932                 return -EINVAL;
1933
1934         return 0;
1935 }
1936
1937 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1938 {
1939         /*
1940          * You can only set the channel explicitly for WDS interfaces,
1941          * all others have their channel managed via their respective
1942          * "establish a connection" command (connect, join, ...)
1943          *
1944          * For AP/GO and mesh mode, the channel can be set with the
1945          * channel userspace API, but is only stored and passed to the
1946          * low-level driver when the AP starts or the mesh is joined.
1947          * This is for backward compatibility, userspace can also give
1948          * the channel in the start-ap or join-mesh commands instead.
1949          *
1950          * Monitors are special as they are normally slaved to
1951          * whatever else is going on, so they have their own special
1952          * operation to set the monitor channel if possible.
1953          */
1954         return !wdev ||
1955                 wdev->iftype == NL80211_IFTYPE_AP ||
1956                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1957                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1958                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1959 }
1960
1961 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1962                                  struct genl_info *info,
1963                                  struct cfg80211_chan_def *chandef)
1964 {
1965         u32 control_freq;
1966
1967         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1968                 return -EINVAL;
1969
1970         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1971
1972         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1973         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1974         chandef->center_freq1 = control_freq;
1975         chandef->center_freq2 = 0;
1976
1977         /* Primary channel not allowed */
1978         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1979                 return -EINVAL;
1980
1981         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1982                 enum nl80211_channel_type chantype;
1983
1984                 chantype = nla_get_u32(
1985                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1986
1987                 switch (chantype) {
1988                 case NL80211_CHAN_NO_HT:
1989                 case NL80211_CHAN_HT20:
1990                 case NL80211_CHAN_HT40PLUS:
1991                 case NL80211_CHAN_HT40MINUS:
1992                         cfg80211_chandef_create(chandef, chandef->chan,
1993                                                 chantype);
1994                         break;
1995                 default:
1996                         return -EINVAL;
1997                 }
1998         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1999                 chandef->width =
2000                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2001                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2002                         chandef->center_freq1 =
2003                                 nla_get_u32(
2004                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2005                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2006                         chandef->center_freq2 =
2007                                 nla_get_u32(
2008                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2009         }
2010
2011         if (!cfg80211_chandef_valid(chandef))
2012                 return -EINVAL;
2013
2014         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2015                                      IEEE80211_CHAN_DISABLED))
2016                 return -EINVAL;
2017
2018         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2019              chandef->width == NL80211_CHAN_WIDTH_10) &&
2020             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2021                 return -EINVAL;
2022
2023         return 0;
2024 }
2025
2026 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2027                                  struct net_device *dev,
2028                                  struct genl_info *info)
2029 {
2030         struct cfg80211_chan_def chandef;
2031         int result;
2032         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2033         struct wireless_dev *wdev = NULL;
2034
2035         if (dev)
2036                 wdev = dev->ieee80211_ptr;
2037         if (!nl80211_can_set_dev_channel(wdev))
2038                 return -EOPNOTSUPP;
2039         if (wdev)
2040                 iftype = wdev->iftype;
2041
2042         result = nl80211_parse_chandef(rdev, info, &chandef);
2043         if (result)
2044                 return result;
2045
2046         switch (iftype) {
2047         case NL80211_IFTYPE_AP:
2048         case NL80211_IFTYPE_P2P_GO:
2049                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2050                                                    iftype)) {
2051                         result = -EINVAL;
2052                         break;
2053                 }
2054                 if (wdev->beacon_interval) {
2055                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2056                             !(rdev->wiphy.features &
2057                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2058                                 result = -EBUSY;
2059                                 break;
2060                         }
2061
2062                         /* Only allow dynamic channel width changes */
2063                         if (chandef.chan != wdev->preset_chandef.chan) {
2064                                 result = -EBUSY;
2065                                 break;
2066                         }
2067                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2068                         if (result)
2069                                 break;
2070                 }
2071                 wdev->preset_chandef = chandef;
2072                 result = 0;
2073                 break;
2074         case NL80211_IFTYPE_MESH_POINT:
2075                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2076                 break;
2077         case NL80211_IFTYPE_MONITOR:
2078                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2079                 break;
2080         default:
2081                 result = -EINVAL;
2082         }
2083
2084         return result;
2085 }
2086
2087 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2088 {
2089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2090         struct net_device *netdev = info->user_ptr[1];
2091
2092         return __nl80211_set_channel(rdev, netdev, info);
2093 }
2094
2095 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2096 {
2097         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2098         struct net_device *dev = info->user_ptr[1];
2099         struct wireless_dev *wdev = dev->ieee80211_ptr;
2100         const u8 *bssid;
2101
2102         if (!info->attrs[NL80211_ATTR_MAC])
2103                 return -EINVAL;
2104
2105         if (netif_running(dev))
2106                 return -EBUSY;
2107
2108         if (!rdev->ops->set_wds_peer)
2109                 return -EOPNOTSUPP;
2110
2111         if (wdev->iftype != NL80211_IFTYPE_WDS)
2112                 return -EOPNOTSUPP;
2113
2114         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2115         return rdev_set_wds_peer(rdev, dev, bssid);
2116 }
2117
2118
2119 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2120 {
2121         struct cfg80211_registered_device *rdev;
2122         struct net_device *netdev = NULL;
2123         struct wireless_dev *wdev;
2124         int result = 0, rem_txq_params = 0;
2125         struct nlattr *nl_txq_params;
2126         u32 changed;
2127         u8 retry_short = 0, retry_long = 0;
2128         u32 frag_threshold = 0, rts_threshold = 0;
2129         u8 coverage_class = 0;
2130
2131         ASSERT_RTNL();
2132
2133         /*
2134          * Try to find the wiphy and netdev. Normally this
2135          * function shouldn't need the netdev, but this is
2136          * done for backward compatibility -- previously
2137          * setting the channel was done per wiphy, but now
2138          * it is per netdev. Previous userland like hostapd
2139          * also passed a netdev to set_wiphy, so that it is
2140          * possible to let that go to the right netdev!
2141          */
2142
2143         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2144                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2145
2146                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2147                 if (netdev && netdev->ieee80211_ptr)
2148                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2149                 else
2150                         netdev = NULL;
2151         }
2152
2153         if (!netdev) {
2154                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2155                                                   info->attrs);
2156                 if (IS_ERR(rdev))
2157                         return PTR_ERR(rdev);
2158                 wdev = NULL;
2159                 netdev = NULL;
2160                 result = 0;
2161         } else
2162                 wdev = netdev->ieee80211_ptr;
2163
2164         /*
2165          * end workaround code, by now the rdev is available
2166          * and locked, and wdev may or may not be NULL.
2167          */
2168
2169         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2170                 result = cfg80211_dev_rename(
2171                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2172
2173         if (result)
2174                 return result;
2175
2176         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2177                 struct ieee80211_txq_params txq_params;
2178                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2179
2180                 if (!rdev->ops->set_txq_params)
2181                         return -EOPNOTSUPP;
2182
2183                 if (!netdev)
2184                         return -EINVAL;
2185
2186                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2187                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2188                         return -EINVAL;
2189
2190                 if (!netif_running(netdev))
2191                         return -ENETDOWN;
2192
2193                 nla_for_each_nested(nl_txq_params,
2194                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2195                                     rem_txq_params) {
2196                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2197                                            nla_data(nl_txq_params),
2198                                            nla_len(nl_txq_params),
2199                                            txq_params_policy);
2200                         if (result)
2201                                 return result;
2202                         result = parse_txq_params(tb, &txq_params);
2203                         if (result)
2204                                 return result;
2205
2206                         result = rdev_set_txq_params(rdev, netdev,
2207                                                      &txq_params);
2208                         if (result)
2209                                 return result;
2210                 }
2211         }
2212
2213         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2214                 result = __nl80211_set_channel(
2215                         rdev,
2216                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2217                         info);
2218                 if (result)
2219                         return result;
2220         }
2221
2222         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2223                 struct wireless_dev *txp_wdev = wdev;
2224                 enum nl80211_tx_power_setting type;
2225                 int idx, mbm = 0;
2226
2227                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2228                         txp_wdev = NULL;
2229
2230                 if (!rdev->ops->set_tx_power)
2231                         return -EOPNOTSUPP;
2232
2233                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2234                 type = nla_get_u32(info->attrs[idx]);
2235
2236                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2237                     (type != NL80211_TX_POWER_AUTOMATIC))
2238                         return -EINVAL;
2239
2240                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2241                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2242                         mbm = nla_get_u32(info->attrs[idx]);
2243                 }
2244
2245                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2246                 if (result)
2247                         return result;
2248         }
2249
2250         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2251             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2252                 u32 tx_ant, rx_ant;
2253                 if ((!rdev->wiphy.available_antennas_tx &&
2254                      !rdev->wiphy.available_antennas_rx) ||
2255                     !rdev->ops->set_antenna)
2256                         return -EOPNOTSUPP;
2257
2258                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2259                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2260
2261                 /* reject antenna configurations which don't match the
2262                  * available antenna masks, except for the "all" mask */
2263                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2264                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2265                         return -EINVAL;
2266
2267                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2268                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2269
2270                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2271                 if (result)
2272                         return result;
2273         }
2274
2275         changed = 0;
2276
2277         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2278                 retry_short = nla_get_u8(
2279                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2280                 if (retry_short == 0)
2281                         return -EINVAL;
2282
2283                 changed |= WIPHY_PARAM_RETRY_SHORT;
2284         }
2285
2286         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2287                 retry_long = nla_get_u8(
2288                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2289                 if (retry_long == 0)
2290                         return -EINVAL;
2291
2292                 changed |= WIPHY_PARAM_RETRY_LONG;
2293         }
2294
2295         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2296                 frag_threshold = nla_get_u32(
2297                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2298                 if (frag_threshold < 256)
2299                         return -EINVAL;
2300
2301                 if (frag_threshold != (u32) -1) {
2302                         /*
2303                          * Fragments (apart from the last one) are required to
2304                          * have even length. Make the fragmentation code
2305                          * simpler by stripping LSB should someone try to use
2306                          * odd threshold value.
2307                          */
2308                         frag_threshold &= ~0x1;
2309                 }
2310                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2311         }
2312
2313         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2314                 rts_threshold = nla_get_u32(
2315                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2316                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2317         }
2318
2319         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2320                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2321                         return -EINVAL;
2322
2323                 coverage_class = nla_get_u8(
2324                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2325                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2326         }
2327
2328         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2329                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2330                         return -EOPNOTSUPP;
2331
2332                 changed |= WIPHY_PARAM_DYN_ACK;
2333         }
2334
2335         if (changed) {
2336                 u8 old_retry_short, old_retry_long;
2337                 u32 old_frag_threshold, old_rts_threshold;
2338                 u8 old_coverage_class;
2339
2340                 if (!rdev->ops->set_wiphy_params)
2341                         return -EOPNOTSUPP;
2342
2343                 old_retry_short = rdev->wiphy.retry_short;
2344                 old_retry_long = rdev->wiphy.retry_long;
2345                 old_frag_threshold = rdev->wiphy.frag_threshold;
2346                 old_rts_threshold = rdev->wiphy.rts_threshold;
2347                 old_coverage_class = rdev->wiphy.coverage_class;
2348
2349                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2350                         rdev->wiphy.retry_short = retry_short;
2351                 if (changed & WIPHY_PARAM_RETRY_LONG)
2352                         rdev->wiphy.retry_long = retry_long;
2353                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2354                         rdev->wiphy.frag_threshold = frag_threshold;
2355                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2356                         rdev->wiphy.rts_threshold = rts_threshold;
2357                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2358                         rdev->wiphy.coverage_class = coverage_class;
2359
2360                 result = rdev_set_wiphy_params(rdev, changed);
2361                 if (result) {
2362                         rdev->wiphy.retry_short = old_retry_short;
2363                         rdev->wiphy.retry_long = old_retry_long;
2364                         rdev->wiphy.frag_threshold = old_frag_threshold;
2365                         rdev->wiphy.rts_threshold = old_rts_threshold;
2366                         rdev->wiphy.coverage_class = old_coverage_class;
2367                         return result;
2368                 }
2369         }
2370         return 0;
2371 }
2372
2373 static inline u64 wdev_id(struct wireless_dev *wdev)
2374 {
2375         return (u64)wdev->identifier |
2376                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2377 }
2378
2379 static int nl80211_send_chandef(struct sk_buff *msg,
2380                                 const struct cfg80211_chan_def *chandef)
2381 {
2382         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2383                 return -EINVAL;
2384
2385         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2386                         chandef->chan->center_freq))
2387                 return -ENOBUFS;
2388         switch (chandef->width) {
2389         case NL80211_CHAN_WIDTH_20_NOHT:
2390         case NL80211_CHAN_WIDTH_20:
2391         case NL80211_CHAN_WIDTH_40:
2392                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2393                                 cfg80211_get_chandef_type(chandef)))
2394                         return -ENOBUFS;
2395                 break;
2396         default:
2397                 break;
2398         }
2399         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2400                 return -ENOBUFS;
2401         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2402                 return -ENOBUFS;
2403         if (chandef->center_freq2 &&
2404             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2405                 return -ENOBUFS;
2406         return 0;
2407 }
2408
2409 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2410                               struct cfg80211_registered_device *rdev,
2411                               struct wireless_dev *wdev, bool removal)
2412 {
2413         struct net_device *dev = wdev->netdev;
2414         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2415         void *hdr;
2416
2417         if (removal)
2418                 cmd = NL80211_CMD_DEL_INTERFACE;
2419
2420         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2421         if (!hdr)
2422                 return -1;
2423
2424         if (dev &&
2425             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2426              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2427                 goto nla_put_failure;
2428
2429         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2430             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2431             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2432             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2433             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2434                         rdev->devlist_generation ^
2435                         (cfg80211_rdev_list_generation << 2)))
2436                 goto nla_put_failure;
2437
2438         if (rdev->ops->get_channel) {
2439                 int ret;
2440                 struct cfg80211_chan_def chandef;
2441
2442                 ret = rdev_get_channel(rdev, wdev, &chandef);
2443                 if (ret == 0) {
2444                         if (nl80211_send_chandef(msg, &chandef))
2445                                 goto nla_put_failure;
2446                 }
2447         }
2448
2449         if (rdev->ops->get_tx_power) {
2450                 int dbm, ret;
2451
2452                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2453                 if (ret == 0 &&
2454                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2455                                 DBM_TO_MBM(dbm)))
2456                         goto nla_put_failure;
2457         }
2458
2459         if (wdev->ssid_len) {
2460                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2461                         goto nla_put_failure;
2462         }
2463
2464         genlmsg_end(msg, hdr);
2465         return 0;
2466
2467  nla_put_failure:
2468         genlmsg_cancel(msg, hdr);
2469         return -EMSGSIZE;
2470 }
2471
2472 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2473 {
2474         int wp_idx = 0;
2475         int if_idx = 0;
2476         int wp_start = cb->args[0];
2477         int if_start = cb->args[1];
2478         struct cfg80211_registered_device *rdev;
2479         struct wireless_dev *wdev;
2480
2481         rtnl_lock();
2482         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2483                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2484                         continue;
2485                 if (wp_idx < wp_start) {
2486                         wp_idx++;
2487                         continue;
2488                 }
2489                 if_idx = 0;
2490
2491                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2492                         if (if_idx < if_start) {
2493                                 if_idx++;
2494                                 continue;
2495                         }
2496                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2497                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2498                                                rdev, wdev, false) < 0) {
2499                                 goto out;
2500                         }
2501                         if_idx++;
2502                 }
2503
2504                 wp_idx++;
2505         }
2506  out:
2507         rtnl_unlock();
2508
2509         cb->args[0] = wp_idx;
2510         cb->args[1] = if_idx;
2511
2512         return skb->len;
2513 }
2514
2515 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2516 {
2517         struct sk_buff *msg;
2518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2519         struct wireless_dev *wdev = info->user_ptr[1];
2520
2521         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2522         if (!msg)
2523                 return -ENOMEM;
2524
2525         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2526                                rdev, wdev, false) < 0) {
2527                 nlmsg_free(msg);
2528                 return -ENOBUFS;
2529         }
2530
2531         return genlmsg_reply(msg, info);
2532 }
2533
2534 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2535         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2536         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2537         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2538         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2539         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2540         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2541 };
2542
2543 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2544 {
2545         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2546         int flag;
2547
2548         *mntrflags = 0;
2549
2550         if (!nla)
2551                 return -EINVAL;
2552
2553         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2554                              nla, mntr_flags_policy))
2555                 return -EINVAL;
2556
2557         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2558                 if (flags[flag])
2559                         *mntrflags |= (1<<flag);
2560
2561         return 0;
2562 }
2563
2564 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2565                                struct net_device *netdev, u8 use_4addr,
2566                                enum nl80211_iftype iftype)
2567 {
2568         if (!use_4addr) {
2569                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2570                         return -EBUSY;
2571                 return 0;
2572         }
2573
2574         switch (iftype) {
2575         case NL80211_IFTYPE_AP_VLAN:
2576                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2577                         return 0;
2578                 break;
2579         case NL80211_IFTYPE_STATION:
2580                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2581                         return 0;
2582                 break;
2583         default:
2584                 break;
2585         }
2586
2587         return -EOPNOTSUPP;
2588 }
2589
2590 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2591 {
2592         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2593         struct vif_params params;
2594         int err;
2595         enum nl80211_iftype otype, ntype;
2596         struct net_device *dev = info->user_ptr[1];
2597         u32 _flags, *flags = NULL;
2598         bool change = false;
2599
2600         memset(&params, 0, sizeof(params));
2601
2602         otype = ntype = dev->ieee80211_ptr->iftype;
2603
2604         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2605                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2606                 if (otype != ntype)
2607                         change = true;
2608                 if (ntype > NL80211_IFTYPE_MAX)
2609                         return -EINVAL;
2610         }
2611
2612         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2613                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2614
2615                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2616                         return -EINVAL;
2617                 if (netif_running(dev))
2618                         return -EBUSY;
2619
2620                 wdev_lock(wdev);
2621                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2622                              IEEE80211_MAX_MESH_ID_LEN);
2623                 wdev->mesh_id_up_len =
2624                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2625                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2626                        wdev->mesh_id_up_len);
2627                 wdev_unlock(wdev);
2628         }
2629
2630         if (info->attrs[NL80211_ATTR_4ADDR]) {
2631                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2632                 change = true;
2633                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2634                 if (err)
2635                         return err;
2636         } else {
2637                 params.use_4addr = -1;
2638         }
2639
2640         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2641                 if (ntype != NL80211_IFTYPE_MONITOR)
2642                         return -EINVAL;
2643                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2644                                           &_flags);
2645                 if (err)
2646                         return err;
2647
2648                 flags = &_flags;
2649                 change = true;
2650         }
2651
2652         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2653             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2654                 return -EOPNOTSUPP;
2655
2656         if (change)
2657                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2658         else
2659                 err = 0;
2660
2661         if (!err && params.use_4addr != -1)
2662                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2663
2664         return err;
2665 }
2666
2667 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2668 {
2669         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2670         struct vif_params params;
2671         struct wireless_dev *wdev;
2672         struct sk_buff *msg, *event;
2673         int err;
2674         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2675         u32 flags;
2676
2677         /* to avoid failing a new interface creation due to pending removal */
2678         cfg80211_destroy_ifaces(rdev);
2679
2680         memset(&params, 0, sizeof(params));
2681
2682         if (!info->attrs[NL80211_ATTR_IFNAME])
2683                 return -EINVAL;
2684
2685         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2686                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2687                 if (type > NL80211_IFTYPE_MAX)
2688                         return -EINVAL;
2689         }
2690
2691         if (!rdev->ops->add_virtual_intf ||
2692             !(rdev->wiphy.interface_modes & (1 << type)))
2693                 return -EOPNOTSUPP;
2694
2695         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2696              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2697             info->attrs[NL80211_ATTR_MAC]) {
2698                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2699                            ETH_ALEN);
2700                 if (!is_valid_ether_addr(params.macaddr))
2701                         return -EADDRNOTAVAIL;
2702         }
2703
2704         if (info->attrs[NL80211_ATTR_4ADDR]) {
2705                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2706                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2707                 if (err)
2708                         return err;
2709         }
2710
2711         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2712                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2713                                   &flags);
2714
2715         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2716             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2717                 return -EOPNOTSUPP;
2718
2719         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2720         if (!msg)
2721                 return -ENOMEM;
2722
2723         wdev = rdev_add_virtual_intf(rdev,
2724                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2725                                 NET_NAME_USER, type, err ? NULL : &flags,
2726                                 &params);
2727         if (WARN_ON(!wdev)) {
2728                 nlmsg_free(msg);
2729                 return -EPROTO;
2730         } else if (IS_ERR(wdev)) {
2731                 nlmsg_free(msg);
2732                 return PTR_ERR(wdev);
2733         }
2734
2735         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2736                 wdev->owner_nlportid = info->snd_portid;
2737
2738         switch (type) {
2739         case NL80211_IFTYPE_MESH_POINT:
2740                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2741                         break;
2742                 wdev_lock(wdev);
2743                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2744                              IEEE80211_MAX_MESH_ID_LEN);
2745                 wdev->mesh_id_up_len =
2746                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2747                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2748                        wdev->mesh_id_up_len);
2749                 wdev_unlock(wdev);
2750                 break;
2751         case NL80211_IFTYPE_P2P_DEVICE:
2752                 /*
2753                  * P2P Device doesn't have a netdev, so doesn't go
2754                  * through the netdev notifier and must be added here
2755                  */
2756                 mutex_init(&wdev->mtx);
2757                 INIT_LIST_HEAD(&wdev->event_list);
2758                 spin_lock_init(&wdev->event_lock);
2759                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2760                 spin_lock_init(&wdev->mgmt_registrations_lock);
2761
2762                 wdev->identifier = ++rdev->wdev_id;
2763                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2764                 rdev->devlist_generation++;
2765                 break;
2766         default:
2767                 break;
2768         }
2769
2770         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2771                                rdev, wdev, false) < 0) {
2772                 nlmsg_free(msg);
2773                 return -ENOBUFS;
2774         }
2775
2776         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2777         if (event) {
2778                 if (nl80211_send_iface(event, 0, 0, 0,
2779                                        rdev, wdev, false) < 0) {
2780                         nlmsg_free(event);
2781                         goto out;
2782                 }
2783
2784                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2785                                         event, 0, NL80211_MCGRP_CONFIG,
2786                                         GFP_KERNEL);
2787         }
2788
2789 out:
2790         return genlmsg_reply(msg, info);
2791 }
2792
2793 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2794 {
2795         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2796         struct wireless_dev *wdev = info->user_ptr[1];
2797         struct sk_buff *msg;
2798         int status;
2799
2800         if (!rdev->ops->del_virtual_intf)
2801                 return -EOPNOTSUPP;
2802
2803         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2804         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2805                 nlmsg_free(msg);
2806                 msg = NULL;
2807         }
2808
2809         /*
2810          * If we remove a wireless device without a netdev then clear
2811          * user_ptr[1] so that nl80211_post_doit won't dereference it
2812          * to check if it needs to do dev_put(). Otherwise it crashes
2813          * since the wdev has been freed, unlike with a netdev where
2814          * we need the dev_put() for the netdev to really be freed.
2815          */
2816         if (!wdev->netdev)
2817                 info->user_ptr[1] = NULL;
2818
2819         status = rdev_del_virtual_intf(rdev, wdev);
2820         if (status >= 0 && msg)
2821                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2822                                         msg, 0, NL80211_MCGRP_CONFIG,
2823                                         GFP_KERNEL);
2824         else
2825                 nlmsg_free(msg);
2826
2827         return status;
2828 }
2829
2830 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2831 {
2832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2833         struct net_device *dev = info->user_ptr[1];
2834         u16 noack_map;
2835
2836         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2837                 return -EINVAL;
2838
2839         if (!rdev->ops->set_noack_map)
2840                 return -EOPNOTSUPP;
2841
2842         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2843
2844         return rdev_set_noack_map(rdev, dev, noack_map);
2845 }
2846
2847 struct get_key_cookie {
2848         struct sk_buff *msg;
2849         int error;
2850         int idx;
2851 };
2852
2853 static void get_key_callback(void *c, struct key_params *params)
2854 {
2855         struct nlattr *key;
2856         struct get_key_cookie *cookie = c;
2857
2858         if ((params->key &&
2859              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2860                      params->key_len, params->key)) ||
2861             (params->seq &&
2862              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2863                      params->seq_len, params->seq)) ||
2864             (params->cipher &&
2865              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2866                          params->cipher)))
2867                 goto nla_put_failure;
2868
2869         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2870         if (!key)
2871                 goto nla_put_failure;
2872
2873         if ((params->key &&
2874              nla_put(cookie->msg, NL80211_KEY_DATA,
2875                      params->key_len, params->key)) ||
2876             (params->seq &&
2877              nla_put(cookie->msg, NL80211_KEY_SEQ,
2878                      params->seq_len, params->seq)) ||
2879             (params->cipher &&
2880              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2881                          params->cipher)))
2882                 goto nla_put_failure;
2883
2884         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2885                 goto nla_put_failure;
2886
2887         nla_nest_end(cookie->msg, key);
2888
2889         return;
2890  nla_put_failure:
2891         cookie->error = 1;
2892 }
2893
2894 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2895 {
2896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2897         int err;
2898         struct net_device *dev = info->user_ptr[1];
2899         u8 key_idx = 0;
2900         const u8 *mac_addr = NULL;
2901         bool pairwise;
2902         struct get_key_cookie cookie = {
2903                 .error = 0,
2904         };
2905         void *hdr;
2906         struct sk_buff *msg;
2907
2908         if (info->attrs[NL80211_ATTR_KEY_IDX])
2909                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2910
2911         if (key_idx > 5)
2912                 return -EINVAL;
2913
2914         if (info->attrs[NL80211_ATTR_MAC])
2915                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2916
2917         pairwise = !!mac_addr;
2918         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2919                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2920                 if (kt >= NUM_NL80211_KEYTYPES)
2921                         return -EINVAL;
2922                 if (kt != NL80211_KEYTYPE_GROUP &&
2923                     kt != NL80211_KEYTYPE_PAIRWISE)
2924                         return -EINVAL;
2925                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2926         }
2927
2928         if (!rdev->ops->get_key)
2929                 return -EOPNOTSUPP;
2930
2931         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2932                 return -ENOENT;
2933
2934         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2935         if (!msg)
2936                 return -ENOMEM;
2937
2938         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2939                              NL80211_CMD_NEW_KEY);
2940         if (!hdr)
2941                 goto nla_put_failure;
2942
2943         cookie.msg = msg;
2944         cookie.idx = key_idx;
2945
2946         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2947             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2948                 goto nla_put_failure;
2949         if (mac_addr &&
2950             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2951                 goto nla_put_failure;
2952
2953         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2954                            get_key_callback);
2955
2956         if (err)
2957                 goto free_msg;
2958
2959         if (cookie.error)
2960                 goto nla_put_failure;
2961
2962         genlmsg_end(msg, hdr);
2963         return genlmsg_reply(msg, info);
2964
2965  nla_put_failure:
2966         err = -ENOBUFS;
2967  free_msg:
2968         nlmsg_free(msg);
2969         return err;
2970 }
2971
2972 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2973 {
2974         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2975         struct key_parse key;
2976         int err;
2977         struct net_device *dev = info->user_ptr[1];
2978
2979         err = nl80211_parse_key(info, &key);
2980         if (err)
2981                 return err;
2982
2983         if (key.idx < 0)
2984                 return -EINVAL;
2985
2986         /* only support setting default key */
2987         if (!key.def && !key.defmgmt)
2988                 return -EINVAL;
2989
2990         wdev_lock(dev->ieee80211_ptr);
2991
2992         if (key.def) {
2993                 if (!rdev->ops->set_default_key) {
2994                         err = -EOPNOTSUPP;
2995                         goto out;
2996                 }
2997
2998                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2999                 if (err)
3000                         goto out;
3001
3002                 err = rdev_set_default_key(rdev, dev, key.idx,
3003                                                  key.def_uni, key.def_multi);
3004
3005                 if (err)
3006                         goto out;
3007
3008 #ifdef CONFIG_CFG80211_WEXT
3009                 dev->ieee80211_ptr->wext.default_key = key.idx;
3010 #endif
3011         } else {
3012                 if (key.def_uni || !key.def_multi) {
3013                         err = -EINVAL;
3014                         goto out;
3015                 }
3016
3017                 if (!rdev->ops->set_default_mgmt_key) {
3018                         err = -EOPNOTSUPP;
3019                         goto out;
3020                 }
3021
3022                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3023                 if (err)
3024                         goto out;
3025
3026                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3027                 if (err)
3028                         goto out;
3029
3030 #ifdef CONFIG_CFG80211_WEXT
3031                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3032 #endif
3033         }
3034
3035  out:
3036         wdev_unlock(dev->ieee80211_ptr);
3037
3038         return err;
3039 }
3040
3041 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3042 {
3043         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3044         int err;
3045         struct net_device *dev = info->user_ptr[1];
3046         struct key_parse key;
3047         const u8 *mac_addr = NULL;
3048
3049         err = nl80211_parse_key(info, &key);
3050         if (err)
3051                 return err;
3052
3053         if (!key.p.key)
3054                 return -EINVAL;
3055
3056         if (info->attrs[NL80211_ATTR_MAC])
3057                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3058
3059         if (key.type == -1) {
3060                 if (mac_addr)
3061                         key.type = NL80211_KEYTYPE_PAIRWISE;
3062                 else
3063                         key.type = NL80211_KEYTYPE_GROUP;
3064         }
3065
3066         /* for now */
3067         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3068             key.type != NL80211_KEYTYPE_GROUP)
3069                 return -EINVAL;
3070
3071         if (!rdev->ops->add_key)
3072                 return -EOPNOTSUPP;
3073
3074         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3075                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3076                                            mac_addr))
3077                 return -EINVAL;
3078
3079         wdev_lock(dev->ieee80211_ptr);
3080         err = nl80211_key_allowed(dev->ieee80211_ptr);
3081         if (!err)
3082                 err = rdev_add_key(rdev, dev, key.idx,
3083                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3084                                     mac_addr, &key.p);
3085         wdev_unlock(dev->ieee80211_ptr);
3086
3087         return err;
3088 }
3089
3090 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3091 {
3092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3093         int err;
3094         struct net_device *dev = info->user_ptr[1];
3095         u8 *mac_addr = NULL;
3096         struct key_parse key;
3097
3098         err = nl80211_parse_key(info, &key);
3099         if (err)
3100                 return err;
3101
3102         if (info->attrs[NL80211_ATTR_MAC])
3103                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3104
3105         if (key.type == -1) {
3106                 if (mac_addr)
3107                         key.type = NL80211_KEYTYPE_PAIRWISE;
3108                 else
3109                         key.type = NL80211_KEYTYPE_GROUP;
3110         }
3111
3112         /* for now */
3113         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3114             key.type != NL80211_KEYTYPE_GROUP)
3115                 return -EINVAL;
3116
3117         if (!rdev->ops->del_key)
3118                 return -EOPNOTSUPP;
3119
3120         wdev_lock(dev->ieee80211_ptr);
3121         err = nl80211_key_allowed(dev->ieee80211_ptr);
3122
3123         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3124             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3125                 err = -ENOENT;
3126
3127         if (!err)
3128                 err = rdev_del_key(rdev, dev, key.idx,
3129                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3130                                    mac_addr);
3131
3132 #ifdef CONFIG_CFG80211_WEXT
3133         if (!err) {
3134                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3135                         dev->ieee80211_ptr->wext.default_key = -1;
3136                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3137                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3138         }
3139 #endif
3140         wdev_unlock(dev->ieee80211_ptr);
3141
3142         return err;
3143 }
3144
3145 /* This function returns an error or the number of nested attributes */
3146 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3147 {
3148         struct nlattr *attr;
3149         int n_entries = 0, tmp;
3150
3151         nla_for_each_nested(attr, nl_attr, tmp) {
3152                 if (nla_len(attr) != ETH_ALEN)
3153                         return -EINVAL;
3154
3155                 n_entries++;
3156         }
3157
3158         return n_entries;
3159 }
3160
3161 /*
3162  * This function parses ACL information and allocates memory for ACL data.
3163  * On successful return, the calling function is responsible to free the
3164  * ACL buffer returned by this function.
3165  */
3166 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3167                                                 struct genl_info *info)
3168 {
3169         enum nl80211_acl_policy acl_policy;
3170         struct nlattr *attr;
3171         struct cfg80211_acl_data *acl;
3172         int i = 0, n_entries, tmp;
3173
3174         if (!wiphy->max_acl_mac_addrs)
3175                 return ERR_PTR(-EOPNOTSUPP);
3176
3177         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3178                 return ERR_PTR(-EINVAL);
3179
3180         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3181         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3182             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3183                 return ERR_PTR(-EINVAL);
3184
3185         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3186                 return ERR_PTR(-EINVAL);
3187
3188         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3189         if (n_entries < 0)
3190                 return ERR_PTR(n_entries);
3191
3192         if (n_entries > wiphy->max_acl_mac_addrs)
3193                 return ERR_PTR(-ENOTSUPP);
3194
3195         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3196                       GFP_KERNEL);
3197         if (!acl)
3198                 return ERR_PTR(-ENOMEM);
3199
3200         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3201                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3202                 i++;
3203         }
3204
3205         acl->n_acl_entries = n_entries;
3206         acl->acl_policy = acl_policy;
3207
3208         return acl;
3209 }
3210
3211 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3212 {
3213         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3214         struct net_device *dev = info->user_ptr[1];
3215         struct cfg80211_acl_data *acl;
3216         int err;
3217
3218         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3219             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3220                 return -EOPNOTSUPP;
3221
3222         if (!dev->ieee80211_ptr->beacon_interval)
3223                 return -EINVAL;
3224
3225         acl = parse_acl_data(&rdev->wiphy, info);
3226         if (IS_ERR(acl))
3227                 return PTR_ERR(acl);
3228
3229         err = rdev_set_mac_acl(rdev, dev, acl);
3230
3231         kfree(acl);
3232
3233         return err;
3234 }
3235
3236 static int nl80211_parse_beacon(struct nlattr *attrs[],
3237                                 struct cfg80211_beacon_data *bcn)
3238 {
3239         bool haveinfo = false;
3240
3241         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3242             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3243             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3244             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3245                 return -EINVAL;
3246
3247         memset(bcn, 0, sizeof(*bcn));
3248
3249         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3250                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3251                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3252                 if (!bcn->head_len)
3253                         return -EINVAL;
3254                 haveinfo = true;
3255         }
3256
3257         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3258                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3259                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3260                 haveinfo = true;
3261         }
3262
3263         if (!haveinfo)
3264                 return -EINVAL;
3265
3266         if (attrs[NL80211_ATTR_IE]) {
3267                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3268                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3269         }
3270
3271         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3272                 bcn->proberesp_ies =
3273                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3274                 bcn->proberesp_ies_len =
3275                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3276         }
3277
3278         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3279                 bcn->assocresp_ies =
3280                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3281                 bcn->assocresp_ies_len =
3282                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3283         }
3284
3285         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3286                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3287                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3288         }
3289
3290         return 0;
3291 }
3292
3293 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3294                                    struct cfg80211_ap_settings *params)
3295 {
3296         struct wireless_dev *wdev;
3297         bool ret = false;
3298
3299         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3300                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3301                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3302                         continue;
3303
3304                 if (!wdev->preset_chandef.chan)
3305                         continue;
3306
3307                 params->chandef = wdev->preset_chandef;
3308                 ret = true;
3309                 break;
3310         }
3311
3312         return ret;
3313 }
3314
3315 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3316                                     enum nl80211_auth_type auth_type,
3317                                     enum nl80211_commands cmd)
3318 {
3319         if (auth_type > NL80211_AUTHTYPE_MAX)
3320                 return false;
3321
3322         switch (cmd) {
3323         case NL80211_CMD_AUTHENTICATE:
3324                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3325                     auth_type == NL80211_AUTHTYPE_SAE)
3326                         return false;
3327                 return true;
3328         case NL80211_CMD_CONNECT:
3329         case NL80211_CMD_START_AP:
3330                 /* SAE not supported yet */
3331                 if (auth_type == NL80211_AUTHTYPE_SAE)
3332                         return false;
3333                 return true;
3334         default:
3335                 return false;
3336         }
3337 }
3338
3339 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3340 {
3341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3342         struct net_device *dev = info->user_ptr[1];
3343         struct wireless_dev *wdev = dev->ieee80211_ptr;
3344         struct cfg80211_ap_settings params;
3345         int err;
3346
3347         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3348             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3349                 return -EOPNOTSUPP;
3350
3351         if (!rdev->ops->start_ap)
3352                 return -EOPNOTSUPP;
3353
3354         if (wdev->beacon_interval)
3355                 return -EALREADY;
3356
3357         memset(&params, 0, sizeof(params));
3358
3359         /* these are required for START_AP */
3360         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3361             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3362             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3363                 return -EINVAL;
3364
3365         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3366         if (err)
3367                 return err;
3368
3369         params.beacon_interval =
3370                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3371         params.dtim_period =
3372                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3373
3374         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3375         if (err)
3376                 return err;
3377
3378         /*
3379          * In theory, some of these attributes should be required here
3380          * but since they were not used when the command was originally
3381          * added, keep them optional for old user space programs to let
3382          * them continue to work with drivers that do not need the
3383          * additional information -- drivers must check!
3384          */
3385         if (info->attrs[NL80211_ATTR_SSID]) {
3386                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3387                 params.ssid_len =
3388                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3389                 if (params.ssid_len == 0 ||
3390                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3391                         return -EINVAL;
3392         }
3393
3394         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3395                 params.hidden_ssid = nla_get_u32(
3396                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3397                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3398                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3399                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3400                         return -EINVAL;
3401         }
3402
3403         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3404
3405         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3406                 params.auth_type = nla_get_u32(
3407                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3408                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3409                                              NL80211_CMD_START_AP))
3410                         return -EINVAL;
3411         } else
3412                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3413
3414         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3415                                       NL80211_MAX_NR_CIPHER_SUITES);
3416         if (err)
3417                 return err;
3418
3419         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3420                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3421                         return -EOPNOTSUPP;
3422                 params.inactivity_timeout = nla_get_u16(
3423                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3424         }
3425
3426         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3427                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3428                         return -EINVAL;
3429                 params.p2p_ctwindow =
3430                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3431                 if (params.p2p_ctwindow > 127)
3432                         return -EINVAL;
3433                 if (params.p2p_ctwindow != 0 &&
3434                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3435                         return -EINVAL;
3436         }
3437
3438         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3439                 u8 tmp;
3440
3441                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3442                         return -EINVAL;
3443                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3444                 if (tmp > 1)
3445                         return -EINVAL;
3446                 params.p2p_opp_ps = tmp;
3447                 if (params.p2p_opp_ps != 0 &&
3448                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3449                         return -EINVAL;
3450         }
3451
3452         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3453                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3454                 if (err)
3455                         return err;
3456         } else if (wdev->preset_chandef.chan) {
3457                 params.chandef = wdev->preset_chandef;
3458         } else if (!nl80211_get_ap_channel(rdev, &params))
3459                 return -EINVAL;
3460
3461         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3462                                            wdev->iftype))
3463                 return -EINVAL;
3464
3465         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3466                 params.smps_mode =
3467                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3468                 switch (params.smps_mode) {
3469                 case NL80211_SMPS_OFF:
3470                         break;
3471                 case NL80211_SMPS_STATIC:
3472                         if (!(rdev->wiphy.features &
3473                               NL80211_FEATURE_STATIC_SMPS))
3474                                 return -EINVAL;
3475                         break;
3476                 case NL80211_SMPS_DYNAMIC:
3477                         if (!(rdev->wiphy.features &
3478                               NL80211_FEATURE_DYNAMIC_SMPS))
3479                                 return -EINVAL;
3480                         break;
3481                 default:
3482                         return -EINVAL;
3483                 }
3484         } else {
3485                 params.smps_mode = NL80211_SMPS_OFF;
3486         }
3487
3488         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3489                 params.acl = parse_acl_data(&rdev->wiphy, info);
3490                 if (IS_ERR(params.acl))
3491                         return PTR_ERR(params.acl);
3492         }
3493
3494         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3495         if (params.pbss && !rdev->wiphy.bands[IEEE80211_BAND_60GHZ])
3496                 return -EOPNOTSUPP;
3497
3498         wdev_lock(wdev);
3499         err = rdev_start_ap(rdev, dev, &params);
3500         if (!err) {
3501                 wdev->preset_chandef = params.chandef;
3502                 wdev->beacon_interval = params.beacon_interval;
3503                 wdev->chandef = params.chandef;
3504                 wdev->ssid_len = params.ssid_len;
3505                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3506         }
3507         wdev_unlock(wdev);
3508
3509         kfree(params.acl);
3510
3511         return err;
3512 }
3513
3514 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3515 {
3516         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3517         struct net_device *dev = info->user_ptr[1];
3518         struct wireless_dev *wdev = dev->ieee80211_ptr;
3519         struct cfg80211_beacon_data params;
3520         int err;
3521
3522         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3523             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3524                 return -EOPNOTSUPP;
3525
3526         if (!rdev->ops->change_beacon)
3527                 return -EOPNOTSUPP;
3528
3529         if (!wdev->beacon_interval)
3530                 return -EINVAL;
3531
3532         err = nl80211_parse_beacon(info->attrs, &params);
3533         if (err)
3534                 return err;
3535
3536         wdev_lock(wdev);
3537         err = rdev_change_beacon(rdev, dev, &params);
3538         wdev_unlock(wdev);
3539
3540         return err;
3541 }
3542
3543 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3544 {
3545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3546         struct net_device *dev = info->user_ptr[1];
3547
3548         return cfg80211_stop_ap(rdev, dev, false);
3549 }
3550
3551 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3552         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3553         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3554         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3555         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3556         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3557         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3558 };
3559
3560 static int parse_station_flags(struct genl_info *info,
3561                                enum nl80211_iftype iftype,
3562                                struct station_parameters *params)
3563 {
3564         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3565         struct nlattr *nla;
3566         int flag;
3567
3568         /*
3569          * Try parsing the new attribute first so userspace
3570          * can specify both for older kernels.
3571          */
3572         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3573         if (nla) {
3574                 struct nl80211_sta_flag_update *sta_flags;
3575
3576                 sta_flags = nla_data(nla);
3577                 params->sta_flags_mask = sta_flags->mask;
3578                 params->sta_flags_set = sta_flags->set;
3579                 params->sta_flags_set &= params->sta_flags_mask;
3580                 if ((params->sta_flags_mask |
3581                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3582                         return -EINVAL;
3583                 return 0;
3584         }
3585
3586         /* if present, parse the old attribute */
3587
3588         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3589         if (!nla)
3590                 return 0;
3591
3592         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3593                              nla, sta_flags_policy))
3594                 return -EINVAL;
3595
3596         /*
3597          * Only allow certain flags for interface types so that
3598          * other attributes are silently ignored. Remember that
3599          * this is backward compatibility code with old userspace
3600          * and shouldn't be hit in other cases anyway.
3601          */
3602         switch (iftype) {
3603         case NL80211_IFTYPE_AP:
3604         case NL80211_IFTYPE_AP_VLAN:
3605         case NL80211_IFTYPE_P2P_GO:
3606                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3607                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3608                                          BIT(NL80211_STA_FLAG_WME) |
3609                                          BIT(NL80211_STA_FLAG_MFP);
3610                 break;
3611         case NL80211_IFTYPE_P2P_CLIENT:
3612         case NL80211_IFTYPE_STATION:
3613                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3614                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3615                 break;
3616         case NL80211_IFTYPE_MESH_POINT:
3617                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3618                                          BIT(NL80211_STA_FLAG_MFP) |
3619                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3620         default:
3621                 return -EINVAL;
3622         }
3623
3624         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3625                 if (flags[flag]) {
3626                         params->sta_flags_set |= (1<<flag);
3627
3628                         /* no longer support new API additions in old API */
3629                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3630                                 return -EINVAL;
3631                 }
3632         }
3633
3634         return 0;
3635 }
3636
3637 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3638                                  int attr)
3639 {
3640         struct nlattr *rate;
3641         u32 bitrate;
3642         u16 bitrate_compat;
3643         enum nl80211_attrs rate_flg;
3644
3645         rate = nla_nest_start(msg, attr);
3646         if (!rate)
3647                 return false;
3648
3649         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3650         bitrate = cfg80211_calculate_bitrate(info);
3651         /* report 16-bit bitrate only if we can */
3652         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3653         if (bitrate > 0 &&
3654             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3655                 return false;
3656         if (bitrate_compat > 0 &&
3657             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3658                 return false;
3659
3660         switch (info->bw) {
3661         case RATE_INFO_BW_5:
3662                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3663                 break;
3664         case RATE_INFO_BW_10:
3665                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3666                 break;
3667         default:
3668                 WARN_ON(1);
3669                 /* fall through */
3670         case RATE_INFO_BW_20:
3671                 rate_flg = 0;
3672                 break;
3673         case RATE_INFO_BW_40:
3674                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3675                 break;
3676         case RATE_INFO_BW_80:
3677                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3678                 break;
3679         case RATE_INFO_BW_160:
3680                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3681                 break;
3682         }
3683
3684         if (rate_flg && nla_put_flag(msg, rate_flg))
3685                 return false;
3686
3687         if (info->flags & RATE_INFO_FLAGS_MCS) {
3688                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3689                         return false;
3690                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3691                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3692                         return false;
3693         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3694                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3695                         return false;
3696                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3697                         return false;
3698                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3699                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3700                         return false;
3701         }
3702
3703         nla_nest_end(msg, rate);
3704         return true;
3705 }
3706
3707 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3708                                int id)
3709 {
3710         void *attr;
3711         int i = 0;
3712
3713         if (!mask)
3714                 return true;
3715
3716         attr = nla_nest_start(msg, id);
3717         if (!attr)
3718                 return false;
3719
3720         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3721                 if (!(mask & BIT(i)))
3722                         continue;
3723
3724                 if (nla_put_u8(msg, i, signal[i]))
3725                         return false;
3726         }
3727
3728         nla_nest_end(msg, attr);
3729
3730         return true;
3731 }
3732
3733 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3734                                 u32 seq, int flags,
3735                                 struct cfg80211_registered_device *rdev,
3736                                 struct net_device *dev,
3737                                 const u8 *mac_addr, struct station_info *sinfo)
3738 {
3739         void *hdr;
3740         struct nlattr *sinfoattr, *bss_param;
3741
3742         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3743         if (!hdr)
3744                 return -1;
3745
3746         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3747             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3748             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3749                 goto nla_put_failure;
3750
3751         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3752         if (!sinfoattr)
3753                 goto nla_put_failure;
3754
3755 #define PUT_SINFO(attr, memb, type) do {                                \
3756         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3757             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3758                              sinfo->memb))                              \
3759                 goto nla_put_failure;                                   \
3760         } while (0)
3761
3762         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3763         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3764
3765         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3766                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3767             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3768                         (u32)sinfo->rx_bytes))
3769                 goto nla_put_failure;
3770
3771         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3772                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3773             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3774                         (u32)sinfo->tx_bytes))
3775                 goto nla_put_failure;
3776
3777         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3778         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3779         PUT_SINFO(LLID, llid, u16);
3780         PUT_SINFO(PLID, plid, u16);
3781         PUT_SINFO(PLINK_STATE, plink_state, u8);
3782
3783         switch (rdev->wiphy.signal_type) {
3784         case CFG80211_SIGNAL_TYPE_MBM:
3785                 PUT_SINFO(SIGNAL, signal, u8);
3786                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3787                 break;
3788         default:
3789                 break;
3790         }
3791         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3792                 if (!nl80211_put_signal(msg, sinfo->chains,
3793                                         sinfo->chain_signal,
3794                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3795                         goto nla_put_failure;
3796         }
3797         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3798                 if (!nl80211_put_signal(msg, sinfo->chains,
3799                                         sinfo->chain_signal_avg,
3800                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3801                         goto nla_put_failure;
3802         }
3803         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3804                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3805                                           NL80211_STA_INFO_TX_BITRATE))
3806                         goto nla_put_failure;
3807         }
3808         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3809                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3810                                           NL80211_STA_INFO_RX_BITRATE))
3811                         goto nla_put_failure;
3812         }
3813
3814         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3815         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3816         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3817         PUT_SINFO(TX_FAILED, tx_failed, u32);
3818         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3819         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3820         PUT_SINFO(LOCAL_PM, local_pm, u32);
3821         PUT_SINFO(PEER_PM, peer_pm, u32);
3822         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3823
3824         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3825                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3826                 if (!bss_param)
3827                         goto nla_put_failure;
3828
3829                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3830                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3831                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3832                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3833                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3834                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3835                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3836                                sinfo->bss_param.dtim_period) ||
3837                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3838                                 sinfo->bss_param.beacon_interval))
3839                         goto nla_put_failure;
3840
3841                 nla_nest_end(msg, bss_param);
3842         }
3843         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3844             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3845                     sizeof(struct nl80211_sta_flag_update),
3846                     &sinfo->sta_flags))
3847                 goto nla_put_failure;
3848
3849         PUT_SINFO(T_OFFSET, t_offset, u64);
3850         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3851         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3852         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3853
3854 #undef PUT_SINFO
3855
3856         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3857                 struct nlattr *tidsattr;
3858                 int tid;
3859
3860                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3861                 if (!tidsattr)
3862                         goto nla_put_failure;
3863
3864                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3865                         struct cfg80211_tid_stats *tidstats;
3866                         struct nlattr *tidattr;
3867
3868                         tidstats = &sinfo->pertid[tid];
3869
3870                         if (!tidstats->filled)
3871                                 continue;
3872
3873                         tidattr = nla_nest_start(msg, tid + 1);
3874                         if (!tidattr)
3875                                 goto nla_put_failure;
3876
3877 #define PUT_TIDVAL(attr, memb, type) do {                               \
3878         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3879             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3880                              tidstats->memb))                           \
3881                 goto nla_put_failure;                                   \
3882         } while (0)
3883
3884                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3885                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3886                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3887                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3888
3889 #undef PUT_TIDVAL
3890                         nla_nest_end(msg, tidattr);
3891                 }
3892
3893                 nla_nest_end(msg, tidsattr);
3894         }
3895
3896         nla_nest_end(msg, sinfoattr);
3897
3898         if (sinfo->assoc_req_ies_len &&
3899             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3900                     sinfo->assoc_req_ies))
3901                 goto nla_put_failure;
3902
3903         genlmsg_end(msg, hdr);
3904         return 0;
3905
3906  nla_put_failure:
3907         genlmsg_cancel(msg, hdr);
3908         return -EMSGSIZE;
3909 }
3910
3911 static int nl80211_dump_station(struct sk_buff *skb,
3912                                 struct netlink_callback *cb)
3913 {
3914         struct station_info sinfo;
3915         struct cfg80211_registered_device *rdev;
3916         struct wireless_dev *wdev;
3917         u8 mac_addr[ETH_ALEN];
3918         int sta_idx = cb->args[2];
3919         int err;
3920
3921         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3922         if (err)
3923                 return err;
3924
3925         if (!wdev->netdev) {
3926                 err = -EINVAL;
3927                 goto out_err;
3928         }
3929
3930         if (!rdev->ops->dump_station) {
3931                 err = -EOPNOTSUPP;
3932                 goto out_err;
3933         }
3934
3935         while (1) {
3936                 memset(&sinfo, 0, sizeof(sinfo));
3937                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3938                                         mac_addr, &sinfo);
3939                 if (err == -ENOENT)
3940                         break;
3941                 if (err)
3942                         goto out_err;
3943
3944                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3945                                 NETLINK_CB(cb->skb).portid,
3946                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3947                                 rdev, wdev->netdev, mac_addr,
3948                                 &sinfo) < 0)
3949                         goto out;
3950
3951                 sta_idx++;
3952         }
3953
3954
3955  out:
3956         cb->args[2] = sta_idx;
3957         err = skb->len;
3958  out_err:
3959         nl80211_finish_wdev_dump(rdev);
3960
3961         return err;
3962 }
3963
3964 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3965 {
3966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3967         struct net_device *dev = info->user_ptr[1];
3968         struct station_info sinfo;
3969         struct sk_buff *msg;
3970         u8 *mac_addr = NULL;
3971         int err;
3972
3973         memset(&sinfo, 0, sizeof(sinfo));
3974
3975         if (!info->attrs[NL80211_ATTR_MAC])
3976                 return -EINVAL;
3977
3978         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3979
3980         if (!rdev->ops->get_station)
3981                 return -EOPNOTSUPP;
3982
3983         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3984         if (err)
3985                 return err;
3986
3987         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3988         if (!msg)
3989                 return -ENOMEM;
3990
3991         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
3992                                  info->snd_portid, info->snd_seq, 0,
3993                                  rdev, dev, mac_addr, &sinfo) < 0) {
3994                 nlmsg_free(msg);
3995                 return -ENOBUFS;
3996         }
3997
3998         return genlmsg_reply(msg, info);
3999 }
4000
4001 int cfg80211_check_station_change(struct wiphy *wiphy,
4002                                   struct station_parameters *params,
4003                                   enum cfg80211_station_type statype)
4004 {
4005         if (params->listen_interval != -1 &&
4006             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4007                 return -EINVAL;
4008
4009         if (params->aid &&
4010             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4011             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4012                 return -EINVAL;
4013
4014         /* When you run into this, adjust the code below for the new flag */
4015         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4016
4017         switch (statype) {
4018         case CFG80211_STA_MESH_PEER_KERNEL:
4019         case CFG80211_STA_MESH_PEER_USER:
4020                 /*
4021                  * No ignoring the TDLS flag here -- the userspace mesh
4022                  * code doesn't have the bug of including TDLS in the
4023                  * mask everywhere.
4024                  */
4025                 if (params->sta_flags_mask &
4026                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4027                                   BIT(NL80211_STA_FLAG_MFP) |
4028                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4029                         return -EINVAL;
4030                 break;
4031         case CFG80211_STA_TDLS_PEER_SETUP:
4032         case CFG80211_STA_TDLS_PEER_ACTIVE:
4033                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4034                         return -EINVAL;
4035                 /* ignore since it can't change */
4036                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4037                 break;
4038         default:
4039                 /* disallow mesh-specific things */
4040                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4041                         return -EINVAL;
4042                 if (params->local_pm)
4043                         return -EINVAL;
4044                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4045                         return -EINVAL;
4046         }
4047
4048         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4049             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4050                 /* TDLS can't be set, ... */
4051                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4052                         return -EINVAL;
4053                 /*
4054                  * ... but don't bother the driver with it. This works around
4055                  * a hostapd/wpa_supplicant issue -- it always includes the
4056                  * TLDS_PEER flag in the mask even for AP mode.
4057                  */
4058                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4059         }
4060
4061         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4062             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4063                 /* reject other things that can't change */
4064                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4065                         return -EINVAL;
4066                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4067                         return -EINVAL;
4068                 if (params->supported_rates)
4069                         return -EINVAL;
4070                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4071                         return -EINVAL;
4072         }
4073
4074         if (statype != CFG80211_STA_AP_CLIENT &&
4075             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4076                 if (params->vlan)
4077                         return -EINVAL;
4078         }
4079
4080         switch (statype) {
4081         case CFG80211_STA_AP_MLME_CLIENT:
4082                 /* Use this only for authorizing/unauthorizing a station */
4083                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4084                         return -EOPNOTSUPP;
4085                 break;
4086         case CFG80211_STA_AP_CLIENT:
4087         case CFG80211_STA_AP_CLIENT_UNASSOC:
4088                 /* accept only the listed bits */
4089                 if (params->sta_flags_mask &
4090                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4091                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4092                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4093                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4094                                   BIT(NL80211_STA_FLAG_WME) |
4095                                   BIT(NL80211_STA_FLAG_MFP)))
4096                         return -EINVAL;
4097
4098                 /* but authenticated/associated only if driver handles it */
4099                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4100                     params->sta_flags_mask &
4101                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4102                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4103                         return -EINVAL;
4104                 break;
4105         case CFG80211_STA_IBSS:
4106         case CFG80211_STA_AP_STA:
4107                 /* reject any changes other than AUTHORIZED */
4108                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4109                         return -EINVAL;
4110                 break;
4111         case CFG80211_STA_TDLS_PEER_SETUP:
4112                 /* reject any changes other than AUTHORIZED or WME */
4113                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4114                                                BIT(NL80211_STA_FLAG_WME)))
4115                         return -EINVAL;
4116                 /* force (at least) rates when authorizing */
4117                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4118                     !params->supported_rates)
4119                         return -EINVAL;
4120                 break;
4121         case CFG80211_STA_TDLS_PEER_ACTIVE:
4122                 /* reject any changes */
4123                 return -EINVAL;
4124         case CFG80211_STA_MESH_PEER_KERNEL:
4125                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4126                         return -EINVAL;
4127                 break;
4128         case CFG80211_STA_MESH_PEER_USER:
4129                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4130                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4131                         return -EINVAL;
4132                 break;
4133         }
4134
4135         return 0;
4136 }
4137 EXPORT_SYMBOL(cfg80211_check_station_change);
4138
4139 /*
4140  * Get vlan interface making sure it is running and on the right wiphy.
4141  */
4142 static struct net_device *get_vlan(struct genl_info *info,
4143                                    struct cfg80211_registered_device *rdev)
4144 {
4145         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4146         struct net_device *v;
4147         int ret;
4148
4149         if (!vlanattr)
4150                 return NULL;
4151
4152         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4153         if (!v)
4154                 return ERR_PTR(-ENODEV);
4155
4156         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4157                 ret = -EINVAL;
4158                 goto error;
4159         }
4160
4161         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4162             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4163             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4164                 ret = -EINVAL;
4165                 goto error;
4166         }
4167
4168         if (!netif_running(v)) {
4169                 ret = -ENETDOWN;
4170                 goto error;
4171         }
4172
4173         return v;
4174  error:
4175         dev_put(v);
4176         return ERR_PTR(ret);
4177 }
4178
4179 static const struct nla_policy
4180 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4181         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4182         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4183 };
4184
4185 static int nl80211_parse_sta_wme(struct genl_info *info,
4186                                  struct station_parameters *params)
4187 {
4188         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4189         struct nlattr *nla;
4190         int err;
4191
4192         /* parse WME attributes if present */
4193         if (!info->attrs[NL80211_ATTR_STA_WME])
4194                 return 0;
4195
4196         nla = info->attrs[NL80211_ATTR_STA_WME];
4197         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4198                                nl80211_sta_wme_policy);
4199         if (err)
4200                 return err;
4201
4202         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4203                 params->uapsd_queues = nla_get_u8(
4204                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4205         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4206                 return -EINVAL;
4207
4208         if (tb[NL80211_STA_WME_MAX_SP])
4209                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4210
4211         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4212                 return -EINVAL;
4213
4214         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4215
4216         return 0;
4217 }
4218
4219 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4220                                       struct station_parameters *params)
4221 {
4222         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4223                 params->supported_channels =
4224                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4225                 params->supported_channels_len =
4226                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4227                 /*
4228                  * Need to include at least one (first channel, number of
4229                  * channels) tuple for each subband, and must have proper
4230                  * tuples for the rest of the data as well.
4231                  */
4232                 if (params->supported_channels_len < 2)
4233                         return -EINVAL;
4234                 if (params->supported_channels_len % 2)
4235                         return -EINVAL;
4236         }
4237
4238         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4239                 params->supported_oper_classes =
4240                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4241                 params->supported_oper_classes_len =
4242                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4243                 /*
4244                  * The value of the Length field of the Supported Operating
4245                  * Classes element is between 2 and 253.
4246                  */
4247                 if (params->supported_oper_classes_len < 2 ||
4248                     params->supported_oper_classes_len > 253)
4249                         return -EINVAL;
4250         }
4251         return 0;
4252 }
4253
4254 static int nl80211_set_station_tdls(struct genl_info *info,
4255                                     struct station_parameters *params)
4256 {
4257         int err;
4258         /* Dummy STA entry gets updated once the peer capabilities are known */
4259         if (info->attrs[NL80211_ATTR_PEER_AID])
4260                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4261         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4262                 params->ht_capa =
4263                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4264         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4265                 params->vht_capa =
4266                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4267
4268         err = nl80211_parse_sta_channel_info(info, params);
4269         if (err)
4270                 return err;
4271
4272         return nl80211_parse_sta_wme(info, params);
4273 }
4274
4275 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4276 {
4277         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4278         struct net_device *dev = info->user_ptr[1];
4279         struct station_parameters params;
4280         u8 *mac_addr;
4281         int err;
4282
4283         memset(&params, 0, sizeof(params));
4284
4285         if (!rdev->ops->change_station)
4286                 return -EOPNOTSUPP;
4287
4288         /*
4289          * AID and listen_interval properties can be set only for unassociated
4290          * station. Include these parameters here and will check them in
4291          * cfg80211_check_station_change().
4292          */
4293         if (info->attrs[NL80211_ATTR_STA_AID])
4294                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4295
4296         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4297                 params.listen_interval =
4298                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4299         else
4300                 params.listen_interval = -1;
4301
4302         if (!info->attrs[NL80211_ATTR_MAC])
4303                 return -EINVAL;
4304
4305         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4306
4307         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4308                 params.supported_rates =
4309                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4310                 params.supported_rates_len =
4311                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4312         }
4313
4314         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4315                 params.capability =
4316                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4317                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4318         }
4319
4320         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4321                 params.ext_capab =
4322                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4323                 params.ext_capab_len =
4324                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4325         }
4326
4327         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4328                 return -EINVAL;
4329
4330         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4331                 params.plink_action =
4332                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4333                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4334                         return -EINVAL;
4335         }
4336
4337         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4338                 params.plink_state =
4339                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4340                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4341                         return -EINVAL;
4342                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4343         }
4344
4345         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4346                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4347                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4348
4349                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4350                     pm > NL80211_MESH_POWER_MAX)
4351                         return -EINVAL;
4352
4353                 params.local_pm = pm;
4354         }
4355
4356         /* Include parameters for TDLS peer (will check later) */
4357         err = nl80211_set_station_tdls(info, &params);
4358         if (err)
4359                 return err;
4360
4361         params.vlan = get_vlan(info, rdev);
4362         if (IS_ERR(params.vlan))
4363                 return PTR_ERR(params.vlan);
4364
4365         switch (dev->ieee80211_ptr->iftype) {
4366         case NL80211_IFTYPE_AP:
4367         case NL80211_IFTYPE_AP_VLAN:
4368         case NL80211_IFTYPE_P2P_GO:
4369         case NL80211_IFTYPE_P2P_CLIENT:
4370         case NL80211_IFTYPE_STATION:
4371         case NL80211_IFTYPE_ADHOC:
4372         case NL80211_IFTYPE_MESH_POINT:
4373                 break;
4374         default:
4375                 err = -EOPNOTSUPP;
4376                 goto out_put_vlan;
4377         }
4378
4379         /* driver will call cfg80211_check_station_change() */
4380         err = rdev_change_station(rdev, dev, mac_addr, &params);
4381
4382  out_put_vlan:
4383         if (params.vlan)
4384                 dev_put(params.vlan);
4385
4386         return err;
4387 }
4388
4389 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4390 {
4391         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4392         int err;
4393         struct net_device *dev = info->user_ptr[1];
4394         struct station_parameters params;
4395         u8 *mac_addr = NULL;
4396         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4397                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4398
4399         memset(&params, 0, sizeof(params));
4400
4401         if (!rdev->ops->add_station)
4402                 return -EOPNOTSUPP;
4403
4404         if (!info->attrs[NL80211_ATTR_MAC])
4405                 return -EINVAL;
4406
4407         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4408                 return -EINVAL;
4409
4410         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4411                 return -EINVAL;
4412
4413         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4414             !info->attrs[NL80211_ATTR_PEER_AID])
4415                 return -EINVAL;
4416
4417         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4418         params.supported_rates =
4419                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4420         params.supported_rates_len =
4421                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4422         params.listen_interval =
4423                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4424
4425         if (info->attrs[NL80211_ATTR_PEER_AID])
4426                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4427         else
4428                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4429         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4430                 return -EINVAL;
4431
4432         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4433                 params.capability =
4434                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4435                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4436         }
4437
4438         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4439                 params.ext_capab =
4440                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4441                 params.ext_capab_len =
4442                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4443         }
4444
4445         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4446                 params.ht_capa =
4447                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4448
4449         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4450                 params.vht_capa =
4451                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4452
4453         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4454                 params.opmode_notif_used = true;
4455                 params.opmode_notif =
4456                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4457         }
4458
4459         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4460                 params.plink_action =
4461                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4462                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4463                         return -EINVAL;
4464         }
4465
4466         err = nl80211_parse_sta_channel_info(info, &params);
4467         if (err)
4468                 return err;
4469
4470         err = nl80211_parse_sta_wme(info, &params);
4471         if (err)
4472                 return err;
4473
4474         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4475                 return -EINVAL;
4476
4477         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4478          * as userspace might just pass through the capabilities from the IEs
4479          * directly, rather than enforcing this restriction and returning an
4480          * error in this case.
4481          */
4482         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4483                 params.ht_capa = NULL;
4484                 params.vht_capa = NULL;
4485         }
4486
4487         /* When you run into this, adjust the code below for the new flag */
4488         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4489
4490         switch (dev->ieee80211_ptr->iftype) {
4491         case NL80211_IFTYPE_AP:
4492         case NL80211_IFTYPE_AP_VLAN:
4493         case NL80211_IFTYPE_P2P_GO:
4494                 /* ignore WME attributes if iface/sta is not capable */
4495                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4496                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4497                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4498
4499                 /* TDLS peers cannot be added */
4500                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4501                     info->attrs[NL80211_ATTR_PEER_AID])
4502                         return -EINVAL;
4503                 /* but don't bother the driver with it */
4504                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4505
4506                 /* allow authenticated/associated only if driver handles it */
4507                 if (!(rdev->wiphy.features &
4508                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4509                     params.sta_flags_mask & auth_assoc)
4510                         return -EINVAL;
4511
4512                 /* Older userspace, or userspace wanting to be compatible with
4513                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4514                  * and assoc flags in the mask, but assumes the station will be
4515                  * added as associated anyway since this was the required driver
4516                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4517                  * introduced.
4518                  * In order to not bother drivers with this quirk in the API
4519                  * set the flags in both the mask and set for new stations in
4520                  * this case.
4521                  */
4522                 if (!(params.sta_flags_mask & auth_assoc)) {
4523                         params.sta_flags_mask |= auth_assoc;
4524                         params.sta_flags_set |= auth_assoc;
4525                 }
4526
4527                 /* must be last in here for error handling */
4528                 params.vlan = get_vlan(info, rdev);
4529                 if (IS_ERR(params.vlan))
4530                         return PTR_ERR(params.vlan);
4531                 break;
4532         case NL80211_IFTYPE_MESH_POINT:
4533                 /* ignore uAPSD data */
4534                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4535
4536                 /* associated is disallowed */
4537                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4538                         return -EINVAL;
4539                 /* TDLS peers cannot be added */
4540                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4541                     info->attrs[NL80211_ATTR_PEER_AID])
4542                         return -EINVAL;
4543                 break;
4544         case NL80211_IFTYPE_STATION:
4545         case NL80211_IFTYPE_P2P_CLIENT:
4546                 /* ignore uAPSD data */
4547                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4548
4549                 /* these are disallowed */
4550                 if (params.sta_flags_mask &
4551                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4552                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4553                         return -EINVAL;
4554                 /* Only TDLS peers can be added */
4555                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4556                         return -EINVAL;
4557                 /* Can only add if TDLS ... */
4558                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4559                         return -EOPNOTSUPP;
4560                 /* ... with external setup is supported */
4561                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4562                         return -EOPNOTSUPP;
4563                 /*
4564                  * Older wpa_supplicant versions always mark the TDLS peer
4565                  * as authorized, but it shouldn't yet be.
4566                  */
4567                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4568                 break;
4569         default:
4570                 return -EOPNOTSUPP;
4571         }
4572
4573         /* be aware of params.vlan when changing code here */
4574
4575         err = rdev_add_station(rdev, dev, mac_addr, &params);
4576
4577         if (params.vlan)
4578                 dev_put(params.vlan);
4579         return err;
4580 }
4581
4582 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4583 {
4584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4585         struct net_device *dev = info->user_ptr[1];
4586         struct station_del_parameters params;
4587
4588         memset(&params, 0, sizeof(params));
4589
4590         if (info->attrs[NL80211_ATTR_MAC])
4591                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4592
4593         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4594             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4595             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4596             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4597                 return -EINVAL;
4598
4599         if (!rdev->ops->del_station)
4600                 return -EOPNOTSUPP;
4601
4602         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4603                 params.subtype =
4604                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4605                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4606                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4607                         return -EINVAL;
4608         } else {
4609                 /* Default to Deauthentication frame */
4610                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4611         }
4612
4613         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4614                 params.reason_code =
4615                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4616                 if (params.reason_code == 0)
4617                         return -EINVAL; /* 0 is reserved */
4618         } else {
4619                 /* Default to reason code 2 */
4620                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4621         }
4622
4623         return rdev_del_station(rdev, dev, &params);
4624 }
4625
4626 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4627                                 int flags, struct net_device *dev,
4628                                 u8 *dst, u8 *next_hop,
4629                                 struct mpath_info *pinfo)
4630 {
4631         void *hdr;
4632         struct nlattr *pinfoattr;
4633
4634         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4635         if (!hdr)
4636                 return -1;
4637
4638         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4639             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4640             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4641             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4642                 goto nla_put_failure;
4643
4644         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4645         if (!pinfoattr)
4646                 goto nla_put_failure;
4647         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4648             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4649                         pinfo->frame_qlen))
4650                 goto nla_put_failure;
4651         if (((pinfo->filled & MPATH_INFO_SN) &&
4652              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4653             ((pinfo->filled & MPATH_INFO_METRIC) &&
4654              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4655                          pinfo->metric)) ||
4656             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4657              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4658                          pinfo->exptime)) ||
4659             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4660              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4661                         pinfo->flags)) ||
4662             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4663              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4664                          pinfo->discovery_timeout)) ||
4665             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4666              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4667                         pinfo->discovery_retries)))
4668                 goto nla_put_failure;
4669
4670         nla_nest_end(msg, pinfoattr);
4671
4672         genlmsg_end(msg, hdr);
4673         return 0;
4674
4675  nla_put_failure:
4676         genlmsg_cancel(msg, hdr);
4677         return -EMSGSIZE;
4678 }
4679
4680 static int nl80211_dump_mpath(struct sk_buff *skb,
4681                               struct netlink_callback *cb)
4682 {
4683         struct mpath_info pinfo;
4684         struct cfg80211_registered_device *rdev;
4685         struct wireless_dev *wdev;
4686         u8 dst[ETH_ALEN];
4687         u8 next_hop[ETH_ALEN];
4688         int path_idx = cb->args[2];
4689         int err;
4690
4691         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4692         if (err)
4693                 return err;
4694
4695         if (!rdev->ops->dump_mpath) {
4696                 err = -EOPNOTSUPP;
4697                 goto out_err;
4698         }
4699
4700         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4701                 err = -EOPNOTSUPP;
4702                 goto out_err;
4703         }
4704
4705         while (1) {
4706                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4707                                       next_hop, &pinfo);
4708                 if (err == -ENOENT)
4709                         break;
4710                 if (err)
4711                         goto out_err;
4712
4713                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4714                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4715                                        wdev->netdev, dst, next_hop,
4716                                        &pinfo) < 0)
4717                         goto out;
4718
4719                 path_idx++;
4720         }
4721
4722
4723  out:
4724         cb->args[2] = path_idx;
4725         err = skb->len;
4726  out_err:
4727         nl80211_finish_wdev_dump(rdev);
4728         return err;
4729 }
4730
4731 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4732 {
4733         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4734         int err;
4735         struct net_device *dev = info->user_ptr[1];
4736         struct mpath_info pinfo;
4737         struct sk_buff *msg;
4738         u8 *dst = NULL;
4739         u8 next_hop[ETH_ALEN];
4740
4741         memset(&pinfo, 0, sizeof(pinfo));
4742
4743         if (!info->attrs[NL80211_ATTR_MAC])
4744                 return -EINVAL;
4745
4746         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4747
4748         if (!rdev->ops->get_mpath)
4749                 return -EOPNOTSUPP;
4750
4751         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4752                 return -EOPNOTSUPP;
4753
4754         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4755         if (err)
4756                 return err;
4757
4758         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4759         if (!msg)
4760                 return -ENOMEM;
4761
4762         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4763                                  dev, dst, next_hop, &pinfo) < 0) {
4764                 nlmsg_free(msg);
4765                 return -ENOBUFS;
4766         }
4767
4768         return genlmsg_reply(msg, info);
4769 }
4770
4771 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4772 {
4773         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4774         struct net_device *dev = info->user_ptr[1];
4775         u8 *dst = NULL;
4776         u8 *next_hop = NULL;
4777
4778         if (!info->attrs[NL80211_ATTR_MAC])
4779                 return -EINVAL;
4780
4781         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4782                 return -EINVAL;
4783
4784         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4785         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4786
4787         if (!rdev->ops->change_mpath)
4788                 return -EOPNOTSUPP;
4789
4790         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4791                 return -EOPNOTSUPP;
4792
4793         return rdev_change_mpath(rdev, dev, dst, next_hop);
4794 }
4795
4796 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4797 {
4798         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4799         struct net_device *dev = info->user_ptr[1];
4800         u8 *dst = NULL;
4801         u8 *next_hop = NULL;
4802
4803         if (!info->attrs[NL80211_ATTR_MAC])
4804                 return -EINVAL;
4805
4806         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4807                 return -EINVAL;
4808
4809         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4810         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4811
4812         if (!rdev->ops->add_mpath)
4813                 return -EOPNOTSUPP;
4814
4815         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4816                 return -EOPNOTSUPP;
4817
4818         return rdev_add_mpath(rdev, dev, dst, next_hop);
4819 }
4820
4821 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4822 {
4823         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4824         struct net_device *dev = info->user_ptr[1];
4825         u8 *dst = NULL;
4826
4827         if (info->attrs[NL80211_ATTR_MAC])
4828                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4829
4830         if (!rdev->ops->del_mpath)
4831                 return -EOPNOTSUPP;
4832
4833         return rdev_del_mpath(rdev, dev, dst);
4834 }
4835
4836 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4837 {
4838         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4839         int err;
4840         struct net_device *dev = info->user_ptr[1];
4841         struct mpath_info pinfo;
4842         struct sk_buff *msg;
4843         u8 *dst = NULL;
4844         u8 mpp[ETH_ALEN];
4845
4846         memset(&pinfo, 0, sizeof(pinfo));
4847
4848         if (!info->attrs[NL80211_ATTR_MAC])
4849                 return -EINVAL;
4850
4851         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4852
4853         if (!rdev->ops->get_mpp)
4854                 return -EOPNOTSUPP;
4855
4856         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4857                 return -EOPNOTSUPP;
4858
4859         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4860         if (err)
4861                 return err;
4862
4863         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4864         if (!msg)
4865                 return -ENOMEM;
4866
4867         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4868                                dev, dst, mpp, &pinfo) < 0) {
4869                 nlmsg_free(msg);
4870                 return -ENOBUFS;
4871         }
4872
4873         return genlmsg_reply(msg, info);
4874 }
4875
4876 static int nl80211_dump_mpp(struct sk_buff *skb,
4877                             struct netlink_callback *cb)
4878 {
4879         struct mpath_info pinfo;
4880         struct cfg80211_registered_device *rdev;
4881         struct wireless_dev *wdev;
4882         u8 dst[ETH_ALEN];
4883         u8 mpp[ETH_ALEN];
4884         int path_idx = cb->args[2];
4885         int err;
4886
4887         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4888         if (err)
4889                 return err;
4890
4891         if (!rdev->ops->dump_mpp) {
4892                 err = -EOPNOTSUPP;
4893                 goto out_err;
4894         }
4895
4896         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4897                 err = -EOPNOTSUPP;
4898                 goto out_err;
4899         }
4900
4901         while (1) {
4902                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4903                                     mpp, &pinfo);
4904                 if (err == -ENOENT)
4905                         break;
4906                 if (err)
4907                         goto out_err;
4908
4909                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4910                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4911                                        wdev->netdev, dst, mpp,
4912                                        &pinfo) < 0)
4913                         goto out;
4914
4915                 path_idx++;
4916         }
4917
4918  out:
4919         cb->args[2] = path_idx;
4920         err = skb->len;
4921  out_err:
4922         nl80211_finish_wdev_dump(rdev);
4923         return err;
4924 }
4925
4926 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4927 {
4928         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4929         struct net_device *dev = info->user_ptr[1];
4930         struct wireless_dev *wdev = dev->ieee80211_ptr;
4931         struct bss_parameters params;
4932         int err;
4933
4934         memset(&params, 0, sizeof(params));
4935         /* default to not changing parameters */
4936         params.use_cts_prot = -1;
4937         params.use_short_preamble = -1;
4938         params.use_short_slot_time = -1;
4939         params.ap_isolate = -1;
4940         params.ht_opmode = -1;
4941         params.p2p_ctwindow = -1;
4942         params.p2p_opp_ps = -1;
4943
4944         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4945                 params.use_cts_prot =
4946                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4947         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4948                 params.use_short_preamble =
4949                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4950         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4951                 params.use_short_slot_time =
4952                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4953         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4954                 params.basic_rates =
4955                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4956                 params.basic_rates_len =
4957                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4958         }
4959         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4960                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4961         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4962                 params.ht_opmode =
4963                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4964
4965         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4966                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4967                         return -EINVAL;
4968                 params.p2p_ctwindow =
4969                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4970                 if (params.p2p_ctwindow < 0)
4971                         return -EINVAL;
4972                 if (params.p2p_ctwindow != 0 &&
4973                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4974                         return -EINVAL;
4975         }
4976
4977         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4978                 u8 tmp;
4979
4980                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4981                         return -EINVAL;
4982                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4983                 if (tmp > 1)
4984                         return -EINVAL;
4985                 params.p2p_opp_ps = tmp;
4986                 if (params.p2p_opp_ps &&
4987                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4988                         return -EINVAL;
4989         }
4990
4991         if (!rdev->ops->change_bss)
4992                 return -EOPNOTSUPP;
4993
4994         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4995             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4996                 return -EOPNOTSUPP;
4997
4998         wdev_lock(wdev);
4999         err = rdev_change_bss(rdev, dev, &params);
5000         wdev_unlock(wdev);
5001
5002         return err;
5003 }
5004
5005 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5006 {
5007         char *data = NULL;
5008         bool is_indoor;
5009         enum nl80211_user_reg_hint_type user_reg_hint_type;
5010         u32 owner_nlportid;
5011
5012
5013         /*
5014          * You should only get this when cfg80211 hasn't yet initialized
5015          * completely when built-in to the kernel right between the time
5016          * window between nl80211_init() and regulatory_init(), if that is
5017          * even possible.
5018          */
5019         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5020                 return -EINPROGRESS;
5021
5022         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5023                 user_reg_hint_type =
5024                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5025         else
5026                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5027
5028         switch (user_reg_hint_type) {
5029         case NL80211_USER_REG_HINT_USER:
5030         case NL80211_USER_REG_HINT_CELL_BASE:
5031                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5032                         return -EINVAL;
5033
5034                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5035                 return regulatory_hint_user(data, user_reg_hint_type);
5036         case NL80211_USER_REG_HINT_INDOOR:
5037                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5038                         owner_nlportid = info->snd_portid;
5039                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5040                 } else {
5041                         owner_nlportid = 0;
5042                         is_indoor = true;
5043                 }
5044
5045                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5046         default:
5047                 return -EINVAL;
5048         }
5049 }
5050
5051 static int nl80211_get_mesh_config(struct sk_buff *skb,
5052                                    struct genl_info *info)
5053 {
5054         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5055         struct net_device *dev = info->user_ptr[1];
5056         struct wireless_dev *wdev = dev->ieee80211_ptr;
5057         struct mesh_config cur_params;
5058         int err = 0;
5059         void *hdr;
5060         struct nlattr *pinfoattr;
5061         struct sk_buff *msg;
5062
5063         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5064                 return -EOPNOTSUPP;
5065
5066         if (!rdev->ops->get_mesh_config)
5067                 return -EOPNOTSUPP;
5068
5069         wdev_lock(wdev);
5070         /* If not connected, get default parameters */
5071         if (!wdev->mesh_id_len)
5072                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5073         else
5074                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5075         wdev_unlock(wdev);
5076
5077         if (err)
5078                 return err;
5079
5080         /* Draw up a netlink message to send back */
5081         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5082         if (!msg)
5083                 return -ENOMEM;
5084         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5085                              NL80211_CMD_GET_MESH_CONFIG);
5086         if (!hdr)
5087                 goto out;
5088         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5089         if (!pinfoattr)
5090                 goto nla_put_failure;
5091         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5092             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5093                         cur_params.dot11MeshRetryTimeout) ||
5094             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5095                         cur_params.dot11MeshConfirmTimeout) ||
5096             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5097                         cur_params.dot11MeshHoldingTimeout) ||
5098             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5099                         cur_params.dot11MeshMaxPeerLinks) ||
5100             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5101                        cur_params.dot11MeshMaxRetries) ||
5102             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5103                        cur_params.dot11MeshTTL) ||
5104             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5105                        cur_params.element_ttl) ||
5106             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5107                        cur_params.auto_open_plinks) ||
5108             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5109                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5110             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5111                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5112             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5113                         cur_params.path_refresh_time) ||
5114             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5115                         cur_params.min_discovery_timeout) ||
5116             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5117                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5118             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5119                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5120             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5121                         cur_params.dot11MeshHWMPperrMinInterval) ||
5122             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5123                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5124             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5125                        cur_params.dot11MeshHWMPRootMode) ||
5126             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5127                         cur_params.dot11MeshHWMPRannInterval) ||
5128             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5129                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5130             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5131                        cur_params.dot11MeshForwarding) ||
5132             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5133                         cur_params.rssi_threshold) ||
5134             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5135                         cur_params.ht_opmode) ||
5136             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5137                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5138             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5139                         cur_params.dot11MeshHWMProotInterval) ||
5140             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5141                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5142             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5143                         cur_params.power_mode) ||
5144             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5145                         cur_params.dot11MeshAwakeWindowDuration) ||
5146             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5147                         cur_params.plink_timeout))
5148                 goto nla_put_failure;
5149         nla_nest_end(msg, pinfoattr);
5150         genlmsg_end(msg, hdr);
5151         return genlmsg_reply(msg, info);
5152
5153  nla_put_failure:
5154         genlmsg_cancel(msg, hdr);
5155  out:
5156         nlmsg_free(msg);
5157         return -ENOBUFS;
5158 }
5159
5160 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5161         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5162         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5163         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5164         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5165         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5166         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5167         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5168         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5169         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5170         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5171         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5172         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5173         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5174         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5175         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5176         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5177         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5178         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5179         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5180         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5181         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5182         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5183         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5184         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5185         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5186         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5187         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5188         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5189 };
5190
5191 static const struct nla_policy
5192         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5193         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5194         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5195         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5196         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5197         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5198         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5199         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5200                                     .len = IEEE80211_MAX_DATA_LEN },
5201         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5202 };
5203
5204 static int nl80211_parse_mesh_config(struct genl_info *info,
5205                                      struct mesh_config *cfg,
5206                                      u32 *mask_out)
5207 {
5208         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5209         u32 mask = 0;
5210
5211 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5212 do {                                                                        \
5213         if (tb[attr]) {                                                     \
5214                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5215                         return -EINVAL;                                     \
5216                 cfg->param = fn(tb[attr]);                                  \
5217                 mask |= (1 << (attr - 1));                                  \
5218         }                                                                   \
5219 } while (0)
5220
5221
5222         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5223                 return -EINVAL;
5224         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5225                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5226                              nl80211_meshconf_params_policy))
5227                 return -EINVAL;
5228
5229         /* This makes sure that there aren't more than 32 mesh config
5230          * parameters (otherwise our bitfield scheme would not work.) */
5231         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5232
5233         /* Fill in the params struct */
5234         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5235                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5236                                   nla_get_u16);
5237         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5238                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5239                                   nla_get_u16);
5240         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5241                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5242                                   nla_get_u16);
5243         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5244                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5245                                   nla_get_u16);
5246         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5247                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5248                                   nla_get_u8);
5249         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5250                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5251         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5252                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5253                                   nla_get_u8);
5254         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5255                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5256                                   nla_get_u8);
5257         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5258                                   1, 255, mask,
5259                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5260                                   nla_get_u32);
5261         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5262                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5263                                   nla_get_u8);
5264         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5265                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5266                                   nla_get_u32);
5267         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5268                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5269                                   nla_get_u16);
5270         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5271                                   1, 65535, mask,
5272                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5273                                   nla_get_u32);
5274         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5275                                   1, 65535, mask,
5276                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5277                                   nla_get_u16);
5278         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5279                                   1, 65535, mask,
5280                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5281                                   nla_get_u16);
5282         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5283                                   dot11MeshHWMPnetDiameterTraversalTime,
5284                                   1, 65535, mask,
5285                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5286                                   nla_get_u16);
5287         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5288                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5289                                   nla_get_u8);
5290         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5291                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5292                                   nla_get_u16);
5293         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5294                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5295                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5296                                   nla_get_u8);
5297         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5298                                   mask, NL80211_MESHCONF_FORWARDING,
5299                                   nla_get_u8);
5300         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5301                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5302                                   nla_get_s32);
5303         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5304                                   mask, NL80211_MESHCONF_HT_OPMODE,
5305                                   nla_get_u16);
5306         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5307                                   1, 65535, mask,
5308                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5309                                   nla_get_u32);
5310         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5311                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5312                                   nla_get_u16);
5313         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5314                                   dot11MeshHWMPconfirmationInterval,
5315                                   1, 65535, mask,
5316                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5317                                   nla_get_u16);
5318         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5319                                   NL80211_MESH_POWER_ACTIVE,
5320                                   NL80211_MESH_POWER_MAX,
5321                                   mask, NL80211_MESHCONF_POWER_MODE,
5322                                   nla_get_u32);
5323         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5324                                   0, 65535, mask,
5325                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5326         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5327                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5328                                   nla_get_u32);
5329         if (mask_out)
5330                 *mask_out = mask;
5331
5332         return 0;
5333
5334 #undef FILL_IN_MESH_PARAM_IF_SET
5335 }
5336
5337 static int nl80211_parse_mesh_setup(struct genl_info *info,
5338                                      struct mesh_setup *setup)
5339 {
5340         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5341         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5342
5343         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5344                 return -EINVAL;
5345         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5346                              info->attrs[NL80211_ATTR_MESH_SETUP],
5347                              nl80211_mesh_setup_params_policy))
5348                 return -EINVAL;
5349
5350         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5351                 setup->sync_method =
5352                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5353                  IEEE80211_SYNC_METHOD_VENDOR :
5354                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5355
5356         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5357                 setup->path_sel_proto =
5358                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5359                  IEEE80211_PATH_PROTOCOL_VENDOR :
5360                  IEEE80211_PATH_PROTOCOL_HWMP;
5361
5362         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5363                 setup->path_metric =
5364                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5365                  IEEE80211_PATH_METRIC_VENDOR :
5366                  IEEE80211_PATH_METRIC_AIRTIME;
5367
5368
5369         if (tb[NL80211_MESH_SETUP_IE]) {
5370                 struct nlattr *ieattr =
5371                         tb[NL80211_MESH_SETUP_IE];
5372                 if (!is_valid_ie_attr(ieattr))
5373                         return -EINVAL;
5374                 setup->ie = nla_data(ieattr);
5375                 setup->ie_len = nla_len(ieattr);
5376         }
5377         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5378             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5379                 return -EINVAL;
5380         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5381         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5382         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5383         if (setup->is_secure)
5384                 setup->user_mpm = true;
5385
5386         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5387                 if (!setup->user_mpm)
5388                         return -EINVAL;
5389                 setup->auth_id =
5390                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5391         }
5392
5393         return 0;
5394 }
5395
5396 static int nl80211_update_mesh_config(struct sk_buff *skb,
5397                                       struct genl_info *info)
5398 {
5399         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5400         struct net_device *dev = info->user_ptr[1];
5401         struct wireless_dev *wdev = dev->ieee80211_ptr;
5402         struct mesh_config cfg;
5403         u32 mask;
5404         int err;
5405
5406         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5407                 return -EOPNOTSUPP;
5408
5409         if (!rdev->ops->update_mesh_config)
5410                 return -EOPNOTSUPP;
5411
5412         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5413         if (err)
5414                 return err;
5415
5416         wdev_lock(wdev);
5417         if (!wdev->mesh_id_len)
5418                 err = -ENOLINK;
5419
5420         if (!err)
5421                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5422
5423         wdev_unlock(wdev);
5424
5425         return err;
5426 }
5427
5428 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5429                               struct sk_buff *msg)
5430 {
5431         struct nlattr *nl_reg_rules;
5432         unsigned int i;
5433
5434         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5435             (regdom->dfs_region &&
5436              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5437                 goto nla_put_failure;
5438
5439         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5440         if (!nl_reg_rules)
5441                 goto nla_put_failure;
5442
5443         for (i = 0; i < regdom->n_reg_rules; i++) {
5444                 struct nlattr *nl_reg_rule;
5445                 const struct ieee80211_reg_rule *reg_rule;
5446                 const struct ieee80211_freq_range *freq_range;
5447                 const struct ieee80211_power_rule *power_rule;
5448                 unsigned int max_bandwidth_khz;
5449
5450                 reg_rule = &regdom->reg_rules[i];
5451                 freq_range = &reg_rule->freq_range;
5452                 power_rule = &reg_rule->power_rule;
5453
5454                 nl_reg_rule = nla_nest_start(msg, i);
5455                 if (!nl_reg_rule)
5456                         goto nla_put_failure;
5457
5458                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5459                 if (!max_bandwidth_khz)
5460                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5461                                                                   reg_rule);
5462
5463                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5464                                 reg_rule->flags) ||
5465                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5466                                 freq_range->start_freq_khz) ||
5467                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5468                                 freq_range->end_freq_khz) ||
5469                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5470                                 max_bandwidth_khz) ||
5471                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5472                                 power_rule->max_antenna_gain) ||
5473                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5474                                 power_rule->max_eirp) ||
5475                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5476                                 reg_rule->dfs_cac_ms))
5477                         goto nla_put_failure;
5478
5479                 nla_nest_end(msg, nl_reg_rule);
5480         }
5481
5482         nla_nest_end(msg, nl_reg_rules);
5483         return 0;
5484
5485 nla_put_failure:
5486         return -EMSGSIZE;
5487 }
5488
5489 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5490 {
5491         const struct ieee80211_regdomain *regdom = NULL;
5492         struct cfg80211_registered_device *rdev;
5493         struct wiphy *wiphy = NULL;
5494         struct sk_buff *msg;
5495         void *hdr;
5496
5497         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5498         if (!msg)
5499                 return -ENOBUFS;
5500
5501         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5502                              NL80211_CMD_GET_REG);
5503         if (!hdr)
5504                 goto put_failure;
5505
5506         if (info->attrs[NL80211_ATTR_WIPHY]) {
5507                 bool self_managed;
5508
5509                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5510                 if (IS_ERR(rdev)) {
5511                         nlmsg_free(msg);
5512                         return PTR_ERR(rdev);
5513                 }
5514
5515                 wiphy = &rdev->wiphy;
5516                 self_managed = wiphy->regulatory_flags &
5517                                REGULATORY_WIPHY_SELF_MANAGED;
5518                 regdom = get_wiphy_regdom(wiphy);
5519
5520                 /* a self-managed-reg device must have a private regdom */
5521                 if (WARN_ON(!regdom && self_managed)) {
5522                         nlmsg_free(msg);
5523                         return -EINVAL;
5524                 }
5525
5526                 if (regdom &&
5527                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5528                         goto nla_put_failure;
5529         }
5530
5531         if (!wiphy && reg_last_request_cell_base() &&
5532             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5533                         NL80211_USER_REG_HINT_CELL_BASE))
5534                 goto nla_put_failure;
5535
5536         rcu_read_lock();
5537
5538         if (!regdom)
5539                 regdom = rcu_dereference(cfg80211_regdomain);
5540
5541         if (nl80211_put_regdom(regdom, msg))
5542                 goto nla_put_failure_rcu;
5543
5544         rcu_read_unlock();
5545
5546         genlmsg_end(msg, hdr);
5547         return genlmsg_reply(msg, info);
5548
5549 nla_put_failure_rcu:
5550         rcu_read_unlock();
5551 nla_put_failure:
5552         genlmsg_cancel(msg, hdr);
5553 put_failure:
5554         nlmsg_free(msg);
5555         return -EMSGSIZE;
5556 }
5557
5558 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5559                                u32 seq, int flags, struct wiphy *wiphy,
5560                                const struct ieee80211_regdomain *regdom)
5561 {
5562         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5563                                    NL80211_CMD_GET_REG);
5564
5565         if (!hdr)
5566                 return -1;
5567
5568         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5569
5570         if (nl80211_put_regdom(regdom, msg))
5571                 goto nla_put_failure;
5572
5573         if (!wiphy && reg_last_request_cell_base() &&
5574             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5575                         NL80211_USER_REG_HINT_CELL_BASE))
5576                 goto nla_put_failure;
5577
5578         if (wiphy &&
5579             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5580                 goto nla_put_failure;
5581
5582         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5583             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5584                 goto nla_put_failure;
5585
5586         genlmsg_end(msg, hdr);
5587         return 0;
5588
5589 nla_put_failure:
5590         genlmsg_cancel(msg, hdr);
5591         return -EMSGSIZE;
5592 }
5593
5594 static int nl80211_get_reg_dump(struct sk_buff *skb,
5595                                 struct netlink_callback *cb)
5596 {
5597         const struct ieee80211_regdomain *regdom = NULL;
5598         struct cfg80211_registered_device *rdev;
5599         int err, reg_idx, start = cb->args[2];
5600
5601         rtnl_lock();
5602
5603         if (cfg80211_regdomain && start == 0) {
5604                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5605                                           NLM_F_MULTI, NULL,
5606                                           rtnl_dereference(cfg80211_regdomain));
5607                 if (err < 0)
5608                         goto out_err;
5609         }
5610
5611         /* the global regdom is idx 0 */
5612         reg_idx = 1;
5613         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5614                 regdom = get_wiphy_regdom(&rdev->wiphy);
5615                 if (!regdom)
5616                         continue;
5617
5618                 if (++reg_idx <= start)
5619                         continue;
5620
5621                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5622                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5623                 if (err < 0) {
5624                         reg_idx--;
5625                         break;
5626                 }
5627         }
5628
5629         cb->args[2] = reg_idx;
5630         err = skb->len;
5631 out_err:
5632         rtnl_unlock();
5633         return err;
5634 }
5635
5636 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5637 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5638         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5639         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5640         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5641         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5642         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5643         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5644         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5645 };
5646
5647 static int parse_reg_rule(struct nlattr *tb[],
5648         struct ieee80211_reg_rule *reg_rule)
5649 {
5650         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5651         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5652
5653         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5654                 return -EINVAL;
5655         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5656                 return -EINVAL;
5657         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5658                 return -EINVAL;
5659         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5660                 return -EINVAL;
5661         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5662                 return -EINVAL;
5663
5664         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5665
5666         freq_range->start_freq_khz =
5667                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5668         freq_range->end_freq_khz =
5669                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5670         freq_range->max_bandwidth_khz =
5671                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5672
5673         power_rule->max_eirp =
5674                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5675
5676         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5677                 power_rule->max_antenna_gain =
5678                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5679
5680         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5681                 reg_rule->dfs_cac_ms =
5682                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5683
5684         return 0;
5685 }
5686
5687 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5688 {
5689         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5690         struct nlattr *nl_reg_rule;
5691         char *alpha2;
5692         int rem_reg_rules, r;
5693         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5694         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5695         struct ieee80211_regdomain *rd;
5696
5697         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5698                 return -EINVAL;
5699
5700         if (!info->attrs[NL80211_ATTR_REG_RULES])
5701                 return -EINVAL;
5702
5703         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5704
5705         if (info->attrs[NL80211_ATTR_DFS_REGION])
5706                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5707
5708         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5709                             rem_reg_rules) {
5710                 num_rules++;
5711                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5712                         return -EINVAL;
5713         }
5714
5715         if (!reg_is_valid_request(alpha2))
5716                 return -EINVAL;
5717
5718         size_of_regd = sizeof(struct ieee80211_regdomain) +
5719                        num_rules * sizeof(struct ieee80211_reg_rule);
5720
5721         rd = kzalloc(size_of_regd, GFP_KERNEL);
5722         if (!rd)
5723                 return -ENOMEM;
5724
5725         rd->n_reg_rules = num_rules;
5726         rd->alpha2[0] = alpha2[0];
5727         rd->alpha2[1] = alpha2[1];
5728
5729         /*
5730          * Disable DFS master mode if the DFS region was
5731          * not supported or known on this kernel.
5732          */
5733         if (reg_supported_dfs_region(dfs_region))
5734                 rd->dfs_region = dfs_region;
5735
5736         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5737                             rem_reg_rules) {
5738                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5739                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5740                               reg_rule_policy);
5741                 if (r)
5742                         goto bad_reg;
5743                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5744                 if (r)
5745                         goto bad_reg;
5746
5747                 rule_idx++;
5748
5749                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5750                         r = -EINVAL;
5751                         goto bad_reg;
5752                 }
5753         }
5754
5755         r = set_regdom(rd, REGD_SOURCE_CRDA);
5756         /* set_regdom took ownership */
5757         rd = NULL;
5758
5759  bad_reg:
5760         kfree(rd);
5761         return r;
5762 }
5763 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5764
5765 static int validate_scan_freqs(struct nlattr *freqs)
5766 {
5767         struct nlattr *attr1, *attr2;
5768         int n_channels = 0, tmp1, tmp2;
5769
5770         nla_for_each_nested(attr1, freqs, tmp1) {
5771                 n_channels++;
5772                 /*
5773                  * Some hardware has a limited channel list for
5774                  * scanning, and it is pretty much nonsensical
5775                  * to scan for a channel twice, so disallow that
5776                  * and don't require drivers to check that the
5777                  * channel list they get isn't longer than what
5778                  * they can scan, as long as they can scan all
5779                  * the channels they registered at once.
5780                  */
5781                 nla_for_each_nested(attr2, freqs, tmp2)
5782                         if (attr1 != attr2 &&
5783                             nla_get_u32(attr1) == nla_get_u32(attr2))
5784                                 return 0;
5785         }
5786
5787         return n_channels;
5788 }
5789
5790 static bool is_band_valid(struct wiphy *wiphy, enum ieee80211_band b)
5791 {
5792         return b < IEEE80211_NUM_BANDS && wiphy->bands[b];
5793 }
5794
5795 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5796                             struct cfg80211_bss_selection *bss_select)
5797 {
5798         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5799         struct nlattr *nest;
5800         int err;
5801         bool found = false;
5802         int i;
5803
5804         /* only process one nested attribute */
5805         nest = nla_data(nla);
5806         if (!nla_ok(nest, nla_len(nest)))
5807                 return -EINVAL;
5808
5809         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
5810                         nla_len(nest), nl80211_bss_select_policy);
5811         if (err)
5812                 return err;
5813
5814         /* only one attribute may be given */
5815         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
5816                 if (attr[i]) {
5817                         if (found)
5818                                 return -EINVAL;
5819                         found = true;
5820                 }
5821         }
5822
5823         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
5824
5825         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
5826                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
5827
5828         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
5829                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
5830                 bss_select->param.band_pref =
5831                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
5832                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
5833                         return -EINVAL;
5834         }
5835
5836         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
5837                 struct nl80211_bss_select_rssi_adjust *adj_param;
5838
5839                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
5840                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
5841                 bss_select->param.adjust.band = adj_param->band;
5842                 bss_select->param.adjust.delta = adj_param->delta;
5843                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
5844                         return -EINVAL;
5845         }
5846
5847         /* user-space did not provide behaviour attribute */
5848         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
5849                 return -EINVAL;
5850
5851         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
5852                 return -EINVAL;
5853
5854         return 0;
5855 }
5856
5857 static int nl80211_parse_random_mac(struct nlattr **attrs,
5858                                     u8 *mac_addr, u8 *mac_addr_mask)
5859 {
5860         int i;
5861
5862         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5863                 eth_zero_addr(mac_addr);
5864                 eth_zero_addr(mac_addr_mask);
5865                 mac_addr[0] = 0x2;
5866                 mac_addr_mask[0] = 0x3;
5867
5868                 return 0;
5869         }
5870
5871         /* need both or none */
5872         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5873                 return -EINVAL;
5874
5875         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5876         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5877
5878         /* don't allow or configure an mcast address */
5879         if (!is_multicast_ether_addr(mac_addr_mask) ||
5880             is_multicast_ether_addr(mac_addr))
5881                 return -EINVAL;
5882
5883         /*
5884          * allow users to pass a MAC address that has bits set outside
5885          * of the mask, but don't bother drivers with having to deal
5886          * with such bits
5887          */
5888         for (i = 0; i < ETH_ALEN; i++)
5889                 mac_addr[i] &= mac_addr_mask[i];
5890
5891         return 0;
5892 }
5893
5894 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5895 {
5896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5897         struct wireless_dev *wdev = info->user_ptr[1];
5898         struct cfg80211_scan_request *request;
5899         struct nlattr *attr;
5900         struct wiphy *wiphy;
5901         int err, tmp, n_ssids = 0, n_channels, i;
5902         size_t ie_len;
5903
5904         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5905                 return -EINVAL;
5906
5907         wiphy = &rdev->wiphy;
5908
5909         if (!rdev->ops->scan)
5910                 return -EOPNOTSUPP;
5911
5912         if (rdev->scan_req || rdev->scan_msg) {
5913                 err = -EBUSY;
5914                 goto unlock;
5915         }
5916
5917         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5918                 n_channels = validate_scan_freqs(
5919                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5920                 if (!n_channels) {
5921                         err = -EINVAL;
5922                         goto unlock;
5923                 }
5924         } else {
5925                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5926         }
5927
5928         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5929                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5930                         n_ssids++;
5931
5932         if (n_ssids > wiphy->max_scan_ssids) {
5933                 err = -EINVAL;
5934                 goto unlock;
5935         }
5936
5937         if (info->attrs[NL80211_ATTR_IE])
5938                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5939         else
5940                 ie_len = 0;
5941
5942         if (ie_len > wiphy->max_scan_ie_len) {
5943                 err = -EINVAL;
5944                 goto unlock;
5945         }
5946
5947         request = kzalloc(sizeof(*request)
5948                         + sizeof(*request->ssids) * n_ssids
5949                         + sizeof(*request->channels) * n_channels
5950                         + ie_len, GFP_KERNEL);
5951         if (!request) {
5952                 err = -ENOMEM;
5953                 goto unlock;
5954         }
5955
5956         if (n_ssids)
5957                 request->ssids = (void *)&request->channels[n_channels];
5958         request->n_ssids = n_ssids;
5959         if (ie_len) {
5960                 if (n_ssids)
5961                         request->ie = (void *)(request->ssids + n_ssids);
5962                 else
5963                         request->ie = (void *)(request->channels + n_channels);
5964         }
5965
5966         i = 0;
5967         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5968                 /* user specified, bail out if channel not found */
5969                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5970                         struct ieee80211_channel *chan;
5971
5972                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5973
5974                         if (!chan) {
5975                                 err = -EINVAL;
5976                                 goto out_free;
5977                         }
5978
5979                         /* ignore disabled channels */
5980                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5981                                 continue;
5982
5983                         request->channels[i] = chan;
5984                         i++;
5985                 }
5986         } else {
5987                 enum ieee80211_band band;
5988
5989                 /* all channels */
5990                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5991                         int j;
5992                         if (!wiphy->bands[band])
5993                                 continue;
5994                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5995                                 struct ieee80211_channel *chan;
5996
5997                                 chan = &wiphy->bands[band]->channels[j];
5998
5999                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6000                                         continue;
6001
6002                                 request->channels[i] = chan;
6003                                 i++;
6004                         }
6005                 }
6006         }
6007
6008         if (!i) {
6009                 err = -EINVAL;
6010                 goto out_free;
6011         }
6012
6013         request->n_channels = i;
6014
6015         i = 0;
6016         if (n_ssids) {
6017                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6018                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6019                                 err = -EINVAL;
6020                                 goto out_free;
6021                         }
6022                         request->ssids[i].ssid_len = nla_len(attr);
6023                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6024                         i++;
6025                 }
6026         }
6027
6028         if (info->attrs[NL80211_ATTR_IE]) {
6029                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6030                 memcpy((void *)request->ie,
6031                        nla_data(info->attrs[NL80211_ATTR_IE]),
6032                        request->ie_len);
6033         }
6034
6035         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
6036                 if (wiphy->bands[i])
6037                         request->rates[i] =
6038                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6039
6040         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6041                 nla_for_each_nested(attr,
6042                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6043                                     tmp) {
6044                         enum ieee80211_band band = nla_type(attr);
6045
6046                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
6047                                 err = -EINVAL;
6048                                 goto out_free;
6049                         }
6050
6051                         if (!wiphy->bands[band])
6052                                 continue;
6053
6054                         err = ieee80211_get_ratemask(wiphy->bands[band],
6055                                                      nla_data(attr),
6056                                                      nla_len(attr),
6057                                                      &request->rates[band]);
6058                         if (err)
6059                                 goto out_free;
6060                 }
6061         }
6062
6063         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6064                 request->flags = nla_get_u32(
6065                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6066                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6067                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6068                         err = -EOPNOTSUPP;
6069                         goto out_free;
6070                 }
6071
6072                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6073                         if (!(wiphy->features &
6074                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6075                                 err = -EOPNOTSUPP;
6076                                 goto out_free;
6077                         }
6078
6079                         if (wdev->current_bss) {
6080                                 err = -EOPNOTSUPP;
6081                                 goto out_free;
6082                         }
6083
6084                         err = nl80211_parse_random_mac(info->attrs,
6085                                                        request->mac_addr,
6086                                                        request->mac_addr_mask);
6087                         if (err)
6088                                 goto out_free;
6089                 }
6090         }
6091
6092         request->no_cck =
6093                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6094
6095         if (info->attrs[NL80211_ATTR_MAC])
6096                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6097                        ETH_ALEN);
6098         else
6099                 eth_broadcast_addr(request->bssid);
6100
6101         request->wdev = wdev;
6102         request->wiphy = &rdev->wiphy;
6103         request->scan_start = jiffies;
6104
6105         rdev->scan_req = request;
6106         err = rdev_scan(rdev, request);
6107
6108         if (!err) {
6109                 nl80211_send_scan_start(rdev, wdev);
6110                 if (wdev->netdev)
6111                         dev_hold(wdev->netdev);
6112         } else {
6113  out_free:
6114                 rdev->scan_req = NULL;
6115                 kfree(request);
6116         }
6117
6118  unlock:
6119         return err;
6120 }
6121
6122 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6123 {
6124         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6125         struct wireless_dev *wdev = info->user_ptr[1];
6126
6127         if (!rdev->ops->abort_scan)
6128                 return -EOPNOTSUPP;
6129
6130         if (rdev->scan_msg)
6131                 return 0;
6132
6133         if (!rdev->scan_req)
6134                 return -ENOENT;
6135
6136         rdev_abort_scan(rdev, wdev);
6137         return 0;
6138 }
6139
6140 static int
6141 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6142                                struct cfg80211_sched_scan_request *request,
6143                                struct nlattr **attrs)
6144 {
6145         int tmp, err, i = 0;
6146         struct nlattr *attr;
6147
6148         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6149                 u32 interval;
6150
6151                 /*
6152                  * If scan plans are not specified,
6153                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6154                  * case one scan plan will be set with the specified scan
6155                  * interval and infinite number of iterations.
6156                  */
6157                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6158                         return -EINVAL;
6159
6160                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6161                 if (!interval)
6162                         return -EINVAL;
6163
6164                 request->scan_plans[0].interval =
6165                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6166                 if (!request->scan_plans[0].interval)
6167                         return -EINVAL;
6168
6169                 if (request->scan_plans[0].interval >
6170                     wiphy->max_sched_scan_plan_interval)
6171                         request->scan_plans[0].interval =
6172                                 wiphy->max_sched_scan_plan_interval;
6173
6174                 return 0;
6175         }
6176
6177         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6178                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6179
6180                 if (WARN_ON(i >= n_plans))
6181                         return -EINVAL;
6182
6183                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6184                                 nla_data(attr), nla_len(attr),
6185                                 nl80211_plan_policy);
6186                 if (err)
6187                         return err;
6188
6189                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6190                         return -EINVAL;
6191
6192                 request->scan_plans[i].interval =
6193                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6194                 if (!request->scan_plans[i].interval ||
6195                     request->scan_plans[i].interval >
6196                     wiphy->max_sched_scan_plan_interval)
6197                         return -EINVAL;
6198
6199                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6200                         request->scan_plans[i].iterations =
6201                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6202                         if (!request->scan_plans[i].iterations ||
6203                             (request->scan_plans[i].iterations >
6204                              wiphy->max_sched_scan_plan_iterations))
6205                                 return -EINVAL;
6206                 } else if (i < n_plans - 1) {
6207                         /*
6208                          * All scan plans but the last one must specify
6209                          * a finite number of iterations
6210                          */
6211                         return -EINVAL;
6212                 }
6213
6214                 i++;
6215         }
6216
6217         /*
6218          * The last scan plan must not specify the number of
6219          * iterations, it is supposed to run infinitely
6220          */
6221         if (request->scan_plans[n_plans - 1].iterations)
6222                 return  -EINVAL;
6223
6224         return 0;
6225 }
6226
6227 static struct cfg80211_sched_scan_request *
6228 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6229                          struct nlattr **attrs)
6230 {
6231         struct cfg80211_sched_scan_request *request;
6232         struct nlattr *attr;
6233         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6234         enum ieee80211_band band;
6235         size_t ie_len;
6236         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6237         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6238
6239         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6240                 return ERR_PTR(-EINVAL);
6241
6242         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6243                 n_channels = validate_scan_freqs(
6244                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6245                 if (!n_channels)
6246                         return ERR_PTR(-EINVAL);
6247         } else {
6248                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6249         }
6250
6251         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6252                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6253                                     tmp)
6254                         n_ssids++;
6255
6256         if (n_ssids > wiphy->max_sched_scan_ssids)
6257                 return ERR_PTR(-EINVAL);
6258
6259         /*
6260          * First, count the number of 'real' matchsets. Due to an issue with
6261          * the old implementation, matchsets containing only the RSSI attribute
6262          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6263          * RSSI for all matchsets, rather than their own matchset for reporting
6264          * all APs with a strong RSSI. This is needed to be compatible with
6265          * older userspace that treated a matchset with only the RSSI as the
6266          * global RSSI for all other matchsets - if there are other matchsets.
6267          */
6268         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6269                 nla_for_each_nested(attr,
6270                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6271                                     tmp) {
6272                         struct nlattr *rssi;
6273
6274                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6275                                         nla_data(attr), nla_len(attr),
6276                                         nl80211_match_policy);
6277                         if (err)
6278                                 return ERR_PTR(err);
6279                         /* add other standalone attributes here */
6280                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6281                                 n_match_sets++;
6282                                 continue;
6283                         }
6284                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6285                         if (rssi)
6286                                 default_match_rssi = nla_get_s32(rssi);
6287                 }
6288         }
6289
6290         /* However, if there's no other matchset, add the RSSI one */
6291         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6292                 n_match_sets = 1;
6293
6294         if (n_match_sets > wiphy->max_match_sets)
6295                 return ERR_PTR(-EINVAL);
6296
6297         if (attrs[NL80211_ATTR_IE])
6298                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6299         else
6300                 ie_len = 0;
6301
6302         if (ie_len > wiphy->max_sched_scan_ie_len)
6303                 return ERR_PTR(-EINVAL);
6304
6305         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6306                 /*
6307                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6308                  * each scan plan already specifies its own interval
6309                  */
6310                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6311                         return ERR_PTR(-EINVAL);
6312
6313                 nla_for_each_nested(attr,
6314                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6315                         n_plans++;
6316         } else {
6317                 /*
6318                  * The scan interval attribute is kept for backward
6319                  * compatibility. If no scan plans are specified and sched scan
6320                  * interval is specified, one scan plan will be set with this
6321                  * scan interval and infinite number of iterations.
6322                  */
6323                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6324                         return ERR_PTR(-EINVAL);
6325
6326                 n_plans = 1;
6327         }
6328
6329         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6330                 return ERR_PTR(-EINVAL);
6331
6332         request = kzalloc(sizeof(*request)
6333                         + sizeof(*request->ssids) * n_ssids
6334                         + sizeof(*request->match_sets) * n_match_sets
6335                         + sizeof(*request->scan_plans) * n_plans
6336                         + sizeof(*request->channels) * n_channels
6337                         + ie_len, GFP_KERNEL);
6338         if (!request)
6339                 return ERR_PTR(-ENOMEM);
6340
6341         if (n_ssids)
6342                 request->ssids = (void *)&request->channels[n_channels];
6343         request->n_ssids = n_ssids;
6344         if (ie_len) {
6345                 if (n_ssids)
6346                         request->ie = (void *)(request->ssids + n_ssids);
6347                 else
6348                         request->ie = (void *)(request->channels + n_channels);
6349         }
6350
6351         if (n_match_sets) {
6352                 if (request->ie)
6353                         request->match_sets = (void *)(request->ie + ie_len);
6354                 else if (n_ssids)
6355                         request->match_sets =
6356                                 (void *)(request->ssids + n_ssids);
6357                 else
6358                         request->match_sets =
6359                                 (void *)(request->channels + n_channels);
6360         }
6361         request->n_match_sets = n_match_sets;
6362
6363         if (n_match_sets)
6364                 request->scan_plans = (void *)(request->match_sets +
6365                                                n_match_sets);
6366         else if (request->ie)
6367                 request->scan_plans = (void *)(request->ie + ie_len);
6368         else if (n_ssids)
6369                 request->scan_plans = (void *)(request->ssids + n_ssids);
6370         else
6371                 request->scan_plans = (void *)(request->channels + n_channels);
6372
6373         request->n_scan_plans = n_plans;
6374
6375         i = 0;
6376         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6377                 /* user specified, bail out if channel not found */
6378                 nla_for_each_nested(attr,
6379                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6380                                     tmp) {
6381                         struct ieee80211_channel *chan;
6382
6383                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6384
6385                         if (!chan) {
6386                                 err = -EINVAL;
6387                                 goto out_free;
6388                         }
6389
6390                         /* ignore disabled channels */
6391                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6392                                 continue;
6393
6394                         request->channels[i] = chan;
6395                         i++;
6396                 }
6397         } else {
6398                 /* all channels */
6399                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6400                         int j;
6401                         if (!wiphy->bands[band])
6402                                 continue;
6403                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6404                                 struct ieee80211_channel *chan;
6405
6406                                 chan = &wiphy->bands[band]->channels[j];
6407
6408                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6409                                         continue;
6410
6411                                 request->channels[i] = chan;
6412                                 i++;
6413                         }
6414                 }
6415         }
6416
6417         if (!i) {
6418                 err = -EINVAL;
6419                 goto out_free;
6420         }
6421
6422         request->n_channels = i;
6423
6424         i = 0;
6425         if (n_ssids) {
6426                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6427                                     tmp) {
6428                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6429                                 err = -EINVAL;
6430                                 goto out_free;
6431                         }
6432                         request->ssids[i].ssid_len = nla_len(attr);
6433                         memcpy(request->ssids[i].ssid, nla_data(attr),
6434                                nla_len(attr));
6435                         i++;
6436                 }
6437         }
6438
6439         i = 0;
6440         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6441                 nla_for_each_nested(attr,
6442                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6443                                     tmp) {
6444                         struct nlattr *ssid, *rssi;
6445
6446                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6447                                         nla_data(attr), nla_len(attr),
6448                                         nl80211_match_policy);
6449                         if (err)
6450                                 goto out_free;
6451                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6452                         if (ssid) {
6453                                 if (WARN_ON(i >= n_match_sets)) {
6454                                         /* this indicates a programming error,
6455                                          * the loop above should have verified
6456                                          * things properly
6457                                          */
6458                                         err = -EINVAL;
6459                                         goto out_free;
6460                                 }
6461
6462                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6463                                         err = -EINVAL;
6464                                         goto out_free;
6465                                 }
6466                                 memcpy(request->match_sets[i].ssid.ssid,
6467                                        nla_data(ssid), nla_len(ssid));
6468                                 request->match_sets[i].ssid.ssid_len =
6469                                         nla_len(ssid);
6470                                 /* special attribute - old implemenation w/a */
6471                                 request->match_sets[i].rssi_thold =
6472                                         default_match_rssi;
6473                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6474                                 if (rssi)
6475                                         request->match_sets[i].rssi_thold =
6476                                                 nla_get_s32(rssi);
6477                         }
6478                         i++;
6479                 }
6480
6481                 /* there was no other matchset, so the RSSI one is alone */
6482                 if (i == 0 && n_match_sets)
6483                         request->match_sets[0].rssi_thold = default_match_rssi;
6484
6485                 request->min_rssi_thold = INT_MAX;
6486                 for (i = 0; i < n_match_sets; i++)
6487                         request->min_rssi_thold =
6488                                 min(request->match_sets[i].rssi_thold,
6489                                     request->min_rssi_thold);
6490         } else {
6491                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6492         }
6493
6494         if (ie_len) {
6495                 request->ie_len = ie_len;
6496                 memcpy((void *)request->ie,
6497                        nla_data(attrs[NL80211_ATTR_IE]),
6498                        request->ie_len);
6499         }
6500
6501         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6502                 request->flags = nla_get_u32(
6503                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6504                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6505                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6506                         err = -EOPNOTSUPP;
6507                         goto out_free;
6508                 }
6509
6510                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6511                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6512
6513                         if (!wdev) /* must be net-detect */
6514                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6515
6516                         if (!(wiphy->features & flg)) {
6517                                 err = -EOPNOTSUPP;
6518                                 goto out_free;
6519                         }
6520
6521                         if (wdev && wdev->current_bss) {
6522                                 err = -EOPNOTSUPP;
6523                                 goto out_free;
6524                         }
6525
6526                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6527                                                        request->mac_addr_mask);
6528                         if (err)
6529                                 goto out_free;
6530                 }
6531         }
6532
6533         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6534                 request->delay =
6535                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6536
6537         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6538         if (err)
6539                 goto out_free;
6540
6541         request->scan_start = jiffies;
6542
6543         return request;
6544
6545 out_free:
6546         kfree(request);
6547         return ERR_PTR(err);
6548 }
6549
6550 static int nl80211_start_sched_scan(struct sk_buff *skb,
6551                                     struct genl_info *info)
6552 {
6553         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6554         struct net_device *dev = info->user_ptr[1];
6555         struct wireless_dev *wdev = dev->ieee80211_ptr;
6556         struct cfg80211_sched_scan_request *sched_scan_req;
6557         int err;
6558
6559         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6560             !rdev->ops->sched_scan_start)
6561                 return -EOPNOTSUPP;
6562
6563         if (rdev->sched_scan_req)
6564                 return -EINPROGRESS;
6565
6566         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6567                                                   info->attrs);
6568
6569         err = PTR_ERR_OR_ZERO(sched_scan_req);
6570         if (err)
6571                 goto out_err;
6572
6573         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6574         if (err)
6575                 goto out_free;
6576
6577         sched_scan_req->dev = dev;
6578         sched_scan_req->wiphy = &rdev->wiphy;
6579
6580         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6581                 sched_scan_req->owner_nlportid = info->snd_portid;
6582
6583         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6584
6585         nl80211_send_sched_scan(rdev, dev,
6586                                 NL80211_CMD_START_SCHED_SCAN);
6587         return 0;
6588
6589 out_free:
6590         kfree(sched_scan_req);
6591 out_err:
6592         return err;
6593 }
6594
6595 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6596                                    struct genl_info *info)
6597 {
6598         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6599
6600         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6601             !rdev->ops->sched_scan_stop)
6602                 return -EOPNOTSUPP;
6603
6604         return __cfg80211_stop_sched_scan(rdev, false);
6605 }
6606
6607 static int nl80211_start_radar_detection(struct sk_buff *skb,
6608                                          struct genl_info *info)
6609 {
6610         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6611         struct net_device *dev = info->user_ptr[1];
6612         struct wireless_dev *wdev = dev->ieee80211_ptr;
6613         struct cfg80211_chan_def chandef;
6614         enum nl80211_dfs_regions dfs_region;
6615         unsigned int cac_time_ms;
6616         int err;
6617
6618         dfs_region = reg_get_dfs_region(wdev->wiphy);
6619         if (dfs_region == NL80211_DFS_UNSET)
6620                 return -EINVAL;
6621
6622         err = nl80211_parse_chandef(rdev, info, &chandef);
6623         if (err)
6624                 return err;
6625
6626         if (netif_carrier_ok(dev))
6627                 return -EBUSY;
6628
6629         if (wdev->cac_started)
6630                 return -EBUSY;
6631
6632         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6633                                             wdev->iftype);
6634         if (err < 0)
6635                 return err;
6636
6637         if (err == 0)
6638                 return -EINVAL;
6639
6640         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6641                 return -EINVAL;
6642
6643         if (!rdev->ops->start_radar_detection)
6644                 return -EOPNOTSUPP;
6645
6646         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6647         if (WARN_ON(!cac_time_ms))
6648                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6649
6650         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6651         if (!err) {
6652                 wdev->chandef = chandef;
6653                 wdev->cac_started = true;
6654                 wdev->cac_start_time = jiffies;
6655                 wdev->cac_time_ms = cac_time_ms;
6656         }
6657         return err;
6658 }
6659
6660 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6661 {
6662         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6663         struct net_device *dev = info->user_ptr[1];
6664         struct wireless_dev *wdev = dev->ieee80211_ptr;
6665         struct cfg80211_csa_settings params;
6666         /* csa_attrs is defined static to avoid waste of stack size - this
6667          * function is called under RTNL lock, so this should not be a problem.
6668          */
6669         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6670         int err;
6671         bool need_new_beacon = false;
6672         int len, i;
6673         u32 cs_count;
6674
6675         if (!rdev->ops->channel_switch ||
6676             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6677                 return -EOPNOTSUPP;
6678
6679         switch (dev->ieee80211_ptr->iftype) {
6680         case NL80211_IFTYPE_AP:
6681         case NL80211_IFTYPE_P2P_GO:
6682                 need_new_beacon = true;
6683
6684                 /* useless if AP is not running */
6685                 if (!wdev->beacon_interval)
6686                         return -ENOTCONN;
6687                 break;
6688         case NL80211_IFTYPE_ADHOC:
6689                 if (!wdev->ssid_len)
6690                         return -ENOTCONN;
6691                 break;
6692         case NL80211_IFTYPE_MESH_POINT:
6693                 if (!wdev->mesh_id_len)
6694                         return -ENOTCONN;
6695                 break;
6696         default:
6697                 return -EOPNOTSUPP;
6698         }
6699
6700         memset(&params, 0, sizeof(params));
6701
6702         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6703             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6704                 return -EINVAL;
6705
6706         /* only important for AP, IBSS and mesh create IEs internally */
6707         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6708                 return -EINVAL;
6709
6710         /* Even though the attribute is u32, the specification says
6711          * u8, so let's make sure we don't overflow.
6712          */
6713         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6714         if (cs_count > 255)
6715                 return -EINVAL;
6716
6717         params.count = cs_count;
6718
6719         if (!need_new_beacon)
6720                 goto skip_beacons;
6721
6722         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6723         if (err)
6724                 return err;
6725
6726         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6727                                info->attrs[NL80211_ATTR_CSA_IES],
6728                                nl80211_policy);
6729         if (err)
6730                 return err;
6731
6732         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6733         if (err)
6734                 return err;
6735
6736         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6737                 return -EINVAL;
6738
6739         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6740         if (!len || (len % sizeof(u16)))
6741                 return -EINVAL;
6742
6743         params.n_counter_offsets_beacon = len / sizeof(u16);
6744         if (rdev->wiphy.max_num_csa_counters &&
6745             (params.n_counter_offsets_beacon >
6746              rdev->wiphy.max_num_csa_counters))
6747                 return -EINVAL;
6748
6749         params.counter_offsets_beacon =
6750                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6751
6752         /* sanity checks - counters should fit and be the same */
6753         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6754                 u16 offset = params.counter_offsets_beacon[i];
6755
6756                 if (offset >= params.beacon_csa.tail_len)
6757                         return -EINVAL;
6758
6759                 if (params.beacon_csa.tail[offset] != params.count)
6760                         return -EINVAL;
6761         }
6762
6763         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6764                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6765                 if (!len || (len % sizeof(u16)))
6766                         return -EINVAL;
6767
6768                 params.n_counter_offsets_presp = len / sizeof(u16);
6769                 if (rdev->wiphy.max_num_csa_counters &&
6770                     (params.n_counter_offsets_beacon >
6771                      rdev->wiphy.max_num_csa_counters))
6772                         return -EINVAL;
6773
6774                 params.counter_offsets_presp =
6775                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6776
6777                 /* sanity checks - counters should fit and be the same */
6778                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6779                         u16 offset = params.counter_offsets_presp[i];
6780
6781                         if (offset >= params.beacon_csa.probe_resp_len)
6782                                 return -EINVAL;
6783
6784                         if (params.beacon_csa.probe_resp[offset] !=
6785                             params.count)
6786                                 return -EINVAL;
6787                 }
6788         }
6789
6790 skip_beacons:
6791         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6792         if (err)
6793                 return err;
6794
6795         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6796                                            wdev->iftype))
6797                 return -EINVAL;
6798
6799         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6800                                             &params.chandef,
6801                                             wdev->iftype);
6802         if (err < 0)
6803                 return err;
6804
6805         if (err > 0)
6806                 params.radar_required = true;
6807
6808         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6809                 params.block_tx = true;
6810
6811         wdev_lock(wdev);
6812         err = rdev_channel_switch(rdev, dev, &params);
6813         wdev_unlock(wdev);
6814
6815         return err;
6816 }
6817
6818 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6819                             u32 seq, int flags,
6820                             struct cfg80211_registered_device *rdev,
6821                             struct wireless_dev *wdev,
6822                             struct cfg80211_internal_bss *intbss)
6823 {
6824         struct cfg80211_bss *res = &intbss->pub;
6825         const struct cfg80211_bss_ies *ies;
6826         void *hdr;
6827         struct nlattr *bss;
6828
6829         ASSERT_WDEV_LOCK(wdev);
6830
6831         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6832                              NL80211_CMD_NEW_SCAN_RESULTS);
6833         if (!hdr)
6834                 return -1;
6835
6836         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6837
6838         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6839                 goto nla_put_failure;
6840         if (wdev->netdev &&
6841             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6842                 goto nla_put_failure;
6843         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6844                 goto nla_put_failure;
6845
6846         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6847         if (!bss)
6848                 goto nla_put_failure;
6849         if ((!is_zero_ether_addr(res->bssid) &&
6850              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6851                 goto nla_put_failure;
6852
6853         rcu_read_lock();
6854         /* indicate whether we have probe response data or not */
6855         if (rcu_access_pointer(res->proberesp_ies) &&
6856             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6857                 goto fail_unlock_rcu;
6858
6859         /* this pointer prefers to be pointed to probe response data
6860          * but is always valid
6861          */
6862         ies = rcu_dereference(res->ies);
6863         if (ies) {
6864                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6865                         goto fail_unlock_rcu;
6866                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6867                                         ies->len, ies->data))
6868                         goto fail_unlock_rcu;
6869         }
6870
6871         /* and this pointer is always (unless driver didn't know) beacon data */
6872         ies = rcu_dereference(res->beacon_ies);
6873         if (ies && ies->from_beacon) {
6874                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6875                         goto fail_unlock_rcu;
6876                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6877                                         ies->len, ies->data))
6878                         goto fail_unlock_rcu;
6879         }
6880         rcu_read_unlock();
6881
6882         if (res->beacon_interval &&
6883             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6884                 goto nla_put_failure;
6885         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6886             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6887             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6888             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6889                         jiffies_to_msecs(jiffies - intbss->ts)))
6890                 goto nla_put_failure;
6891
6892         if (intbss->ts_boottime &&
6893             nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6894                         intbss->ts_boottime))
6895                 goto nla_put_failure;
6896
6897         switch (rdev->wiphy.signal_type) {
6898         case CFG80211_SIGNAL_TYPE_MBM:
6899                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6900                         goto nla_put_failure;
6901                 break;
6902         case CFG80211_SIGNAL_TYPE_UNSPEC:
6903                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6904                         goto nla_put_failure;
6905                 break;
6906         default:
6907                 break;
6908         }
6909
6910         switch (wdev->iftype) {
6911         case NL80211_IFTYPE_P2P_CLIENT:
6912         case NL80211_IFTYPE_STATION:
6913                 if (intbss == wdev->current_bss &&
6914                     nla_put_u32(msg, NL80211_BSS_STATUS,
6915                                 NL80211_BSS_STATUS_ASSOCIATED))
6916                         goto nla_put_failure;
6917                 break;
6918         case NL80211_IFTYPE_ADHOC:
6919                 if (intbss == wdev->current_bss &&
6920                     nla_put_u32(msg, NL80211_BSS_STATUS,
6921                                 NL80211_BSS_STATUS_IBSS_JOINED))
6922                         goto nla_put_failure;
6923                 break;
6924         default:
6925                 break;
6926         }
6927
6928         nla_nest_end(msg, bss);
6929
6930         genlmsg_end(msg, hdr);
6931         return 0;
6932
6933  fail_unlock_rcu:
6934         rcu_read_unlock();
6935  nla_put_failure:
6936         genlmsg_cancel(msg, hdr);
6937         return -EMSGSIZE;
6938 }
6939
6940 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6941 {
6942         struct cfg80211_registered_device *rdev;
6943         struct cfg80211_internal_bss *scan;
6944         struct wireless_dev *wdev;
6945         int start = cb->args[2], idx = 0;
6946         int err;
6947
6948         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6949         if (err)
6950                 return err;
6951
6952         wdev_lock(wdev);
6953         spin_lock_bh(&rdev->bss_lock);
6954         cfg80211_bss_expire(rdev);
6955
6956         cb->seq = rdev->bss_generation;
6957
6958         list_for_each_entry(scan, &rdev->bss_list, list) {
6959                 if (++idx <= start)
6960                         continue;
6961                 if (nl80211_send_bss(skb, cb,
6962                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6963                                 rdev, wdev, scan) < 0) {
6964                         idx--;
6965                         break;
6966                 }
6967         }
6968
6969         spin_unlock_bh(&rdev->bss_lock);
6970         wdev_unlock(wdev);
6971
6972         cb->args[2] = idx;
6973         nl80211_finish_wdev_dump(rdev);
6974
6975         return skb->len;
6976 }
6977
6978 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6979                                int flags, struct net_device *dev,
6980                                bool allow_radio_stats,
6981                                struct survey_info *survey)
6982 {
6983         void *hdr;
6984         struct nlattr *infoattr;
6985
6986         /* skip radio stats if userspace didn't request them */
6987         if (!survey->channel && !allow_radio_stats)
6988                 return 0;
6989
6990         hdr = nl80211hdr_put(msg, portid, seq, flags,
6991                              NL80211_CMD_NEW_SURVEY_RESULTS);
6992         if (!hdr)
6993                 return -ENOMEM;
6994
6995         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6996                 goto nla_put_failure;
6997
6998         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6999         if (!infoattr)
7000                 goto nla_put_failure;
7001
7002         if (survey->channel &&
7003             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7004                         survey->channel->center_freq))
7005                 goto nla_put_failure;
7006
7007         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7008             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7009                 goto nla_put_failure;
7010         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7011             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7012                 goto nla_put_failure;
7013         if ((survey->filled & SURVEY_INFO_TIME) &&
7014             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME,
7015                         survey->time))
7016                 goto nla_put_failure;
7017         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7018             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7019                         survey->time_busy))
7020                 goto nla_put_failure;
7021         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7022             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7023                         survey->time_ext_busy))
7024                 goto nla_put_failure;
7025         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7026             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_RX,
7027                         survey->time_rx))
7028                 goto nla_put_failure;
7029         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7030             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_TX,
7031                         survey->time_tx))
7032                 goto nla_put_failure;
7033         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7034             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7035                         survey->time_scan))
7036                 goto nla_put_failure;
7037
7038         nla_nest_end(msg, infoattr);
7039
7040         genlmsg_end(msg, hdr);
7041         return 0;
7042
7043  nla_put_failure:
7044         genlmsg_cancel(msg, hdr);
7045         return -EMSGSIZE;
7046 }
7047
7048 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7049 {
7050         struct survey_info survey;
7051         struct cfg80211_registered_device *rdev;
7052         struct wireless_dev *wdev;
7053         int survey_idx = cb->args[2];
7054         int res;
7055         bool radio_stats;
7056
7057         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7058         if (res)
7059                 return res;
7060
7061         /* prepare_wdev_dump parsed the attributes */
7062         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7063
7064         if (!wdev->netdev) {
7065                 res = -EINVAL;
7066                 goto out_err;
7067         }
7068
7069         if (!rdev->ops->dump_survey) {
7070                 res = -EOPNOTSUPP;
7071                 goto out_err;
7072         }
7073
7074         while (1) {
7075                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7076                 if (res == -ENOENT)
7077                         break;
7078                 if (res)
7079                         goto out_err;
7080
7081                 /* don't send disabled channels, but do send non-channel data */
7082                 if (survey.channel &&
7083                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7084                         survey_idx++;
7085                         continue;
7086                 }
7087
7088                 if (nl80211_send_survey(skb,
7089                                 NETLINK_CB(cb->skb).portid,
7090                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7091                                 wdev->netdev, radio_stats, &survey) < 0)
7092                         goto out;
7093                 survey_idx++;
7094         }
7095
7096  out:
7097         cb->args[2] = survey_idx;
7098         res = skb->len;
7099  out_err:
7100         nl80211_finish_wdev_dump(rdev);
7101         return res;
7102 }
7103
7104 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7105 {
7106         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7107                                   NL80211_WPA_VERSION_2));
7108 }
7109
7110 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7111 {
7112         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7113         struct net_device *dev = info->user_ptr[1];
7114         struct ieee80211_channel *chan;
7115         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7116         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7117         enum nl80211_auth_type auth_type;
7118         struct key_parse key;
7119         bool local_state_change;
7120
7121         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7122                 return -EINVAL;
7123
7124         if (!info->attrs[NL80211_ATTR_MAC])
7125                 return -EINVAL;
7126
7127         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7128                 return -EINVAL;
7129
7130         if (!info->attrs[NL80211_ATTR_SSID])
7131                 return -EINVAL;
7132
7133         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7134                 return -EINVAL;
7135
7136         err = nl80211_parse_key(info, &key);
7137         if (err)
7138                 return err;
7139
7140         if (key.idx >= 0) {
7141                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7142                         return -EINVAL;
7143                 if (!key.p.key || !key.p.key_len)
7144                         return -EINVAL;
7145                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7146                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7147                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7148                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7149                         return -EINVAL;
7150                 if (key.idx > 4)
7151                         return -EINVAL;
7152         } else {
7153                 key.p.key_len = 0;
7154                 key.p.key = NULL;
7155         }
7156
7157         if (key.idx >= 0) {
7158                 int i;
7159                 bool ok = false;
7160                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7161                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7162                                 ok = true;
7163                                 break;
7164                         }
7165                 }
7166                 if (!ok)
7167                         return -EINVAL;
7168         }
7169
7170         if (!rdev->ops->auth)
7171                 return -EOPNOTSUPP;
7172
7173         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7174             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7175                 return -EOPNOTSUPP;
7176
7177         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7178         chan = nl80211_get_valid_chan(&rdev->wiphy,
7179                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7180         if (!chan)
7181                 return -EINVAL;
7182
7183         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7184         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7185
7186         if (info->attrs[NL80211_ATTR_IE]) {
7187                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7188                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7189         }
7190
7191         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7192         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7193                 return -EINVAL;
7194
7195         if (auth_type == NL80211_AUTHTYPE_SAE &&
7196             !info->attrs[NL80211_ATTR_SAE_DATA])
7197                 return -EINVAL;
7198
7199         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7200                 if (auth_type != NL80211_AUTHTYPE_SAE)
7201                         return -EINVAL;
7202                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7203                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7204                 /* need to include at least Auth Transaction and Status Code */
7205                 if (sae_data_len < 4)
7206                         return -EINVAL;
7207         }
7208
7209         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7210
7211         /*
7212          * Since we no longer track auth state, ignore
7213          * requests to only change local state.
7214          */
7215         if (local_state_change)
7216                 return 0;
7217
7218         wdev_lock(dev->ieee80211_ptr);
7219         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7220                                  ssid, ssid_len, ie, ie_len,
7221                                  key.p.key, key.p.key_len, key.idx,
7222                                  sae_data, sae_data_len);
7223         wdev_unlock(dev->ieee80211_ptr);
7224         return err;
7225 }
7226
7227 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7228                                    struct genl_info *info,
7229                                    struct cfg80211_crypto_settings *settings,
7230                                    int cipher_limit)
7231 {
7232         memset(settings, 0, sizeof(*settings));
7233
7234         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7235
7236         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7237                 u16 proto;
7238                 proto = nla_get_u16(
7239                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7240                 settings->control_port_ethertype = cpu_to_be16(proto);
7241                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7242                     proto != ETH_P_PAE)
7243                         return -EINVAL;
7244                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7245                         settings->control_port_no_encrypt = true;
7246         } else
7247                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7248
7249         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7250                 void *data;
7251                 int len, i;
7252
7253                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7254                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7255                 settings->n_ciphers_pairwise = len / sizeof(u32);
7256
7257                 if (len % sizeof(u32))
7258                         return -EINVAL;
7259
7260                 if (settings->n_ciphers_pairwise > cipher_limit)
7261                         return -EINVAL;
7262
7263                 memcpy(settings->ciphers_pairwise, data, len);
7264
7265                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7266                         if (!cfg80211_supported_cipher_suite(
7267                                         &rdev->wiphy,
7268                                         settings->ciphers_pairwise[i]))
7269                                 return -EINVAL;
7270         }
7271
7272         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7273                 settings->cipher_group =
7274                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7275                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7276                                                      settings->cipher_group))
7277                         return -EINVAL;
7278         }
7279
7280         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7281                 settings->wpa_versions =
7282                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7283                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7284                         return -EINVAL;
7285         }
7286
7287         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7288                 void *data;
7289                 int len;
7290
7291                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7292                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7293                 settings->n_akm_suites = len / sizeof(u32);
7294
7295                 if (len % sizeof(u32))
7296                         return -EINVAL;
7297
7298                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7299                         return -EINVAL;
7300
7301                 memcpy(settings->akm_suites, data, len);
7302         }
7303
7304         return 0;
7305 }
7306
7307 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7308 {
7309         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7310         struct net_device *dev = info->user_ptr[1];
7311         struct ieee80211_channel *chan;
7312         struct cfg80211_assoc_request req = {};
7313         const u8 *bssid, *ssid;
7314         int err, ssid_len = 0;
7315
7316         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7317                 return -EINVAL;
7318
7319         if (!info->attrs[NL80211_ATTR_MAC] ||
7320             !info->attrs[NL80211_ATTR_SSID] ||
7321             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7322                 return -EINVAL;
7323
7324         if (!rdev->ops->assoc)
7325                 return -EOPNOTSUPP;
7326
7327         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7328             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7329                 return -EOPNOTSUPP;
7330
7331         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7332
7333         chan = nl80211_get_valid_chan(&rdev->wiphy,
7334                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7335         if (!chan)
7336                 return -EINVAL;
7337
7338         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7339         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7340
7341         if (info->attrs[NL80211_ATTR_IE]) {
7342                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7343                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7344         }
7345
7346         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7347                 enum nl80211_mfp mfp =
7348                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7349                 if (mfp == NL80211_MFP_REQUIRED)
7350                         req.use_mfp = true;
7351                 else if (mfp != NL80211_MFP_NO)
7352                         return -EINVAL;
7353         }
7354
7355         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7356                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7357
7358         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7359                 req.flags |= ASSOC_REQ_DISABLE_HT;
7360
7361         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7362                 memcpy(&req.ht_capa_mask,
7363                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7364                        sizeof(req.ht_capa_mask));
7365
7366         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7367                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7368                         return -EINVAL;
7369                 memcpy(&req.ht_capa,
7370                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7371                        sizeof(req.ht_capa));
7372         }
7373
7374         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7375                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7376
7377         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7378                 memcpy(&req.vht_capa_mask,
7379                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7380                        sizeof(req.vht_capa_mask));
7381
7382         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7383                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7384                         return -EINVAL;
7385                 memcpy(&req.vht_capa,
7386                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7387                        sizeof(req.vht_capa));
7388         }
7389
7390         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7391                 if (!((rdev->wiphy.features &
7392                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7393                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7394                     !wiphy_ext_feature_isset(&rdev->wiphy,
7395                                              NL80211_EXT_FEATURE_RRM))
7396                         return -EINVAL;
7397                 req.flags |= ASSOC_REQ_USE_RRM;
7398         }
7399
7400         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7401         if (!err) {
7402                 wdev_lock(dev->ieee80211_ptr);
7403                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7404                                           ssid, ssid_len, &req);
7405                 wdev_unlock(dev->ieee80211_ptr);
7406         }
7407
7408         return err;
7409 }
7410
7411 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7412 {
7413         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7414         struct net_device *dev = info->user_ptr[1];
7415         const u8 *ie = NULL, *bssid;
7416         int ie_len = 0, err;
7417         u16 reason_code;
7418         bool local_state_change;
7419
7420         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7421                 return -EINVAL;
7422
7423         if (!info->attrs[NL80211_ATTR_MAC])
7424                 return -EINVAL;
7425
7426         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7427                 return -EINVAL;
7428
7429         if (!rdev->ops->deauth)
7430                 return -EOPNOTSUPP;
7431
7432         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7433             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7434                 return -EOPNOTSUPP;
7435
7436         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7437
7438         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7439         if (reason_code == 0) {
7440                 /* Reason Code 0 is reserved */
7441                 return -EINVAL;
7442         }
7443
7444         if (info->attrs[NL80211_ATTR_IE]) {
7445                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7446                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7447         }
7448
7449         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7450
7451         wdev_lock(dev->ieee80211_ptr);
7452         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7453                                    local_state_change);
7454         wdev_unlock(dev->ieee80211_ptr);
7455         return err;
7456 }
7457
7458 static int nl80211_disassociate(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->disassoc)
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_disassoc(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 bool
7506 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7507                          int mcast_rate[IEEE80211_NUM_BANDS],
7508                          int rateval)
7509 {
7510         struct wiphy *wiphy = &rdev->wiphy;
7511         bool found = false;
7512         int band, i;
7513
7514         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7515                 struct ieee80211_supported_band *sband;
7516
7517                 sband = wiphy->bands[band];
7518                 if (!sband)
7519                         continue;
7520
7521                 for (i = 0; i < sband->n_bitrates; i++) {
7522                         if (sband->bitrates[i].bitrate == rateval) {
7523                                 mcast_rate[band] = i + 1;
7524                                 found = true;
7525                                 break;
7526                         }
7527                 }
7528         }
7529
7530         return found;
7531 }
7532
7533 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7534 {
7535         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7536         struct net_device *dev = info->user_ptr[1];
7537         struct cfg80211_ibss_params ibss;
7538         struct wiphy *wiphy;
7539         struct cfg80211_cached_keys *connkeys = NULL;
7540         int err;
7541
7542         memset(&ibss, 0, sizeof(ibss));
7543
7544         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7545                 return -EINVAL;
7546
7547         if (!info->attrs[NL80211_ATTR_SSID] ||
7548             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7549                 return -EINVAL;
7550
7551         ibss.beacon_interval = 100;
7552
7553         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7554                 ibss.beacon_interval =
7555                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7556                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7557                         return -EINVAL;
7558         }
7559
7560         if (!rdev->ops->join_ibss)
7561                 return -EOPNOTSUPP;
7562
7563         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7564                 return -EOPNOTSUPP;
7565
7566         wiphy = &rdev->wiphy;
7567
7568         if (info->attrs[NL80211_ATTR_MAC]) {
7569                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7570
7571                 if (!is_valid_ether_addr(ibss.bssid))
7572                         return -EINVAL;
7573         }
7574         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7575         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7576
7577         if (info->attrs[NL80211_ATTR_IE]) {
7578                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7579                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7580         }
7581
7582         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7583         if (err)
7584                 return err;
7585
7586         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7587                                      NL80211_IFTYPE_ADHOC))
7588                 return -EINVAL;
7589
7590         switch (ibss.chandef.width) {
7591         case NL80211_CHAN_WIDTH_5:
7592         case NL80211_CHAN_WIDTH_10:
7593         case NL80211_CHAN_WIDTH_20_NOHT:
7594                 break;
7595         case NL80211_CHAN_WIDTH_20:
7596         case NL80211_CHAN_WIDTH_40:
7597                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7598                         return -EINVAL;
7599                 break;
7600         case NL80211_CHAN_WIDTH_80:
7601         case NL80211_CHAN_WIDTH_80P80:
7602         case NL80211_CHAN_WIDTH_160:
7603                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7604                         return -EINVAL;
7605                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7606                                              NL80211_EXT_FEATURE_VHT_IBSS))
7607                         return -EINVAL;
7608                 break;
7609         default:
7610                 return -EINVAL;
7611         }
7612
7613         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7614         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7615
7616         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7617                 u8 *rates =
7618                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7619                 int n_rates =
7620                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7621                 struct ieee80211_supported_band *sband =
7622                         wiphy->bands[ibss.chandef.chan->band];
7623
7624                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7625                                              &ibss.basic_rates);
7626                 if (err)
7627                         return err;
7628         }
7629
7630         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7631                 memcpy(&ibss.ht_capa_mask,
7632                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7633                        sizeof(ibss.ht_capa_mask));
7634
7635         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7636                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7637                         return -EINVAL;
7638                 memcpy(&ibss.ht_capa,
7639                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7640                        sizeof(ibss.ht_capa));
7641         }
7642
7643         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7644             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7645                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7646                 return -EINVAL;
7647
7648         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7649                 bool no_ht = false;
7650
7651                 connkeys = nl80211_parse_connkeys(rdev,
7652                                           info->attrs[NL80211_ATTR_KEYS],
7653                                           &no_ht);
7654                 if (IS_ERR(connkeys))
7655                         return PTR_ERR(connkeys);
7656
7657                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7658                     no_ht) {
7659                         kzfree(connkeys);
7660                         return -EINVAL;
7661                 }
7662         }
7663
7664         ibss.control_port =
7665                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7666
7667         ibss.userspace_handles_dfs =
7668                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7669
7670         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7671         if (err)
7672                 kzfree(connkeys);
7673         return err;
7674 }
7675
7676 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7677 {
7678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7679         struct net_device *dev = info->user_ptr[1];
7680
7681         if (!rdev->ops->leave_ibss)
7682                 return -EOPNOTSUPP;
7683
7684         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7685                 return -EOPNOTSUPP;
7686
7687         return cfg80211_leave_ibss(rdev, dev, false);
7688 }
7689
7690 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7691 {
7692         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7693         struct net_device *dev = info->user_ptr[1];
7694         int mcast_rate[IEEE80211_NUM_BANDS];
7695         u32 nla_rate;
7696         int err;
7697
7698         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7699             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7700             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7701                 return -EOPNOTSUPP;
7702
7703         if (!rdev->ops->set_mcast_rate)
7704                 return -EOPNOTSUPP;
7705
7706         memset(mcast_rate, 0, sizeof(mcast_rate));
7707
7708         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7709                 return -EINVAL;
7710
7711         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7712         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7713                 return -EINVAL;
7714
7715         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7716
7717         return err;
7718 }
7719
7720 static struct sk_buff *
7721 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7722                             struct wireless_dev *wdev, int approxlen,
7723                             u32 portid, u32 seq, enum nl80211_commands cmd,
7724                             enum nl80211_attrs attr,
7725                             const struct nl80211_vendor_cmd_info *info,
7726                             gfp_t gfp)
7727 {
7728         struct sk_buff *skb;
7729         void *hdr;
7730         struct nlattr *data;
7731
7732         skb = nlmsg_new(approxlen + 100, gfp);
7733         if (!skb)
7734                 return NULL;
7735
7736         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7737         if (!hdr) {
7738                 kfree_skb(skb);
7739                 return NULL;
7740         }
7741
7742         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7743                 goto nla_put_failure;
7744
7745         if (info) {
7746                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7747                                 info->vendor_id))
7748                         goto nla_put_failure;
7749                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7750                                 info->subcmd))
7751                         goto nla_put_failure;
7752         }
7753
7754         if (wdev) {
7755                 if (nla_put_u64(skb, NL80211_ATTR_WDEV,
7756                                 wdev_id(wdev)))
7757                         goto nla_put_failure;
7758                 if (wdev->netdev &&
7759                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7760                                 wdev->netdev->ifindex))
7761                         goto nla_put_failure;
7762         }
7763
7764         data = nla_nest_start(skb, attr);
7765
7766         ((void **)skb->cb)[0] = rdev;
7767         ((void **)skb->cb)[1] = hdr;
7768         ((void **)skb->cb)[2] = data;
7769
7770         return skb;
7771
7772  nla_put_failure:
7773         kfree_skb(skb);
7774         return NULL;
7775 }
7776
7777 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7778                                            struct wireless_dev *wdev,
7779                                            enum nl80211_commands cmd,
7780                                            enum nl80211_attrs attr,
7781                                            int vendor_event_idx,
7782                                            int approxlen, gfp_t gfp)
7783 {
7784         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7785         const struct nl80211_vendor_cmd_info *info;
7786
7787         switch (cmd) {
7788         case NL80211_CMD_TESTMODE:
7789                 if (WARN_ON(vendor_event_idx != -1))
7790                         return NULL;
7791                 info = NULL;
7792                 break;
7793         case NL80211_CMD_VENDOR:
7794                 if (WARN_ON(vendor_event_idx < 0 ||
7795                             vendor_event_idx >= wiphy->n_vendor_events))
7796                         return NULL;
7797                 info = &wiphy->vendor_events[vendor_event_idx];
7798                 break;
7799         default:
7800                 WARN_ON(1);
7801                 return NULL;
7802         }
7803
7804         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7805                                            cmd, attr, info, gfp);
7806 }
7807 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7808
7809 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7810 {
7811         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7812         void *hdr = ((void **)skb->cb)[1];
7813         struct nlattr *data = ((void **)skb->cb)[2];
7814         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7815
7816         /* clear CB data for netlink core to own from now on */
7817         memset(skb->cb, 0, sizeof(skb->cb));
7818
7819         nla_nest_end(skb, data);
7820         genlmsg_end(skb, hdr);
7821
7822         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7823                 mcgrp = NL80211_MCGRP_VENDOR;
7824
7825         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7826                                 mcgrp, gfp);
7827 }
7828 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7829
7830 #ifdef CONFIG_NL80211_TESTMODE
7831 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7832 {
7833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7834         struct wireless_dev *wdev =
7835                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7836         int err;
7837
7838         if (!rdev->ops->testmode_cmd)
7839                 return -EOPNOTSUPP;
7840
7841         if (IS_ERR(wdev)) {
7842                 err = PTR_ERR(wdev);
7843                 if (err != -EINVAL)
7844                         return err;
7845                 wdev = NULL;
7846         } else if (wdev->wiphy != &rdev->wiphy) {
7847                 return -EINVAL;
7848         }
7849
7850         if (!info->attrs[NL80211_ATTR_TESTDATA])
7851                 return -EINVAL;
7852
7853         rdev->cur_cmd_info = info;
7854         err = rdev_testmode_cmd(rdev, wdev,
7855                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7856                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7857         rdev->cur_cmd_info = NULL;
7858
7859         return err;
7860 }
7861
7862 static int nl80211_testmode_dump(struct sk_buff *skb,
7863                                  struct netlink_callback *cb)
7864 {
7865         struct cfg80211_registered_device *rdev;
7866         int err;
7867         long phy_idx;
7868         void *data = NULL;
7869         int data_len = 0;
7870
7871         rtnl_lock();
7872
7873         if (cb->args[0]) {
7874                 /*
7875                  * 0 is a valid index, but not valid for args[0],
7876                  * so we need to offset by 1.
7877                  */
7878                 phy_idx = cb->args[0] - 1;
7879         } else {
7880                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7881                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7882                                   nl80211_policy);
7883                 if (err)
7884                         goto out_err;
7885
7886                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7887                                                   nl80211_fam.attrbuf);
7888                 if (IS_ERR(rdev)) {
7889                         err = PTR_ERR(rdev);
7890                         goto out_err;
7891                 }
7892                 phy_idx = rdev->wiphy_idx;
7893                 rdev = NULL;
7894
7895                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7896                         cb->args[1] =
7897                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7898         }
7899
7900         if (cb->args[1]) {
7901                 data = nla_data((void *)cb->args[1]);
7902                 data_len = nla_len((void *)cb->args[1]);
7903         }
7904
7905         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7906         if (!rdev) {
7907                 err = -ENOENT;
7908                 goto out_err;
7909         }
7910
7911         if (!rdev->ops->testmode_dump) {
7912                 err = -EOPNOTSUPP;
7913                 goto out_err;
7914         }
7915
7916         while (1) {
7917                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7918                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7919                                            NL80211_CMD_TESTMODE);
7920                 struct nlattr *tmdata;
7921
7922                 if (!hdr)
7923                         break;
7924
7925                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7926                         genlmsg_cancel(skb, hdr);
7927                         break;
7928                 }
7929
7930                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7931                 if (!tmdata) {
7932                         genlmsg_cancel(skb, hdr);
7933                         break;
7934                 }
7935                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7936                 nla_nest_end(skb, tmdata);
7937
7938                 if (err == -ENOBUFS || err == -ENOENT) {
7939                         genlmsg_cancel(skb, hdr);
7940                         break;
7941                 } else if (err) {
7942                         genlmsg_cancel(skb, hdr);
7943                         goto out_err;
7944                 }
7945
7946                 genlmsg_end(skb, hdr);
7947         }
7948
7949         err = skb->len;
7950         /* see above */
7951         cb->args[0] = phy_idx + 1;
7952  out_err:
7953         rtnl_unlock();
7954         return err;
7955 }
7956 #endif
7957
7958 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7959 {
7960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7961         struct net_device *dev = info->user_ptr[1];
7962         struct cfg80211_connect_params connect;
7963         struct wiphy *wiphy;
7964         struct cfg80211_cached_keys *connkeys = NULL;
7965         int err;
7966
7967         memset(&connect, 0, sizeof(connect));
7968
7969         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7970                 return -EINVAL;
7971
7972         if (!info->attrs[NL80211_ATTR_SSID] ||
7973             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7974                 return -EINVAL;
7975
7976         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7977                 connect.auth_type =
7978                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7979                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7980                                              NL80211_CMD_CONNECT))
7981                         return -EINVAL;
7982         } else
7983                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7984
7985         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7986
7987         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7988                                       NL80211_MAX_NR_CIPHER_SUITES);
7989         if (err)
7990                 return err;
7991
7992         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7993             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7994                 return -EOPNOTSUPP;
7995
7996         wiphy = &rdev->wiphy;
7997
7998         connect.bg_scan_period = -1;
7999         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8000                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8001                 connect.bg_scan_period =
8002                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8003         }
8004
8005         if (info->attrs[NL80211_ATTR_MAC])
8006                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8007         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8008                 connect.bssid_hint =
8009                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8010         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8011         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8012
8013         if (info->attrs[NL80211_ATTR_IE]) {
8014                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8015                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8016         }
8017
8018         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8019                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8020                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8021                     connect.mfp != NL80211_MFP_NO)
8022                         return -EINVAL;
8023         } else {
8024                 connect.mfp = NL80211_MFP_NO;
8025         }
8026
8027         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8028                 connect.channel = nl80211_get_valid_chan(
8029                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8030                 if (!connect.channel)
8031                         return -EINVAL;
8032         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8033                 connect.channel_hint = nl80211_get_valid_chan(
8034                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8035                 if (!connect.channel_hint)
8036                         return -EINVAL;
8037         }
8038
8039         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8040                 connkeys = nl80211_parse_connkeys(rdev,
8041                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8042                 if (IS_ERR(connkeys))
8043                         return PTR_ERR(connkeys);
8044         }
8045
8046         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8047                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8048
8049         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8050                 memcpy(&connect.ht_capa_mask,
8051                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8052                        sizeof(connect.ht_capa_mask));
8053
8054         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8055                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8056                         kzfree(connkeys);
8057                         return -EINVAL;
8058                 }
8059                 memcpy(&connect.ht_capa,
8060                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8061                        sizeof(connect.ht_capa));
8062         }
8063
8064         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8065                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8066
8067         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8068                 memcpy(&connect.vht_capa_mask,
8069                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8070                        sizeof(connect.vht_capa_mask));
8071
8072         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8073                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8074                         kzfree(connkeys);
8075                         return -EINVAL;
8076                 }
8077                 memcpy(&connect.vht_capa,
8078                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8079                        sizeof(connect.vht_capa));
8080         }
8081
8082         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8083                 if (!((rdev->wiphy.features &
8084                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8085                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8086                     !wiphy_ext_feature_isset(&rdev->wiphy,
8087                                              NL80211_EXT_FEATURE_RRM)) {
8088                         kzfree(connkeys);
8089                         return -EINVAL;
8090                 }
8091                 connect.flags |= ASSOC_REQ_USE_RRM;
8092         }
8093
8094         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8095         if (connect.pbss && !rdev->wiphy.bands[IEEE80211_BAND_60GHZ]) {
8096                 kzfree(connkeys);
8097                 return -EOPNOTSUPP;
8098         }
8099
8100         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8101                 /* bss selection makes no sense if bssid is set */
8102                 if (connect.bssid) {
8103                         kzfree(connkeys);
8104                         return -EINVAL;
8105                 }
8106
8107                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8108                                        wiphy, &connect.bss_select);
8109                 if (err) {
8110                         kzfree(connkeys);
8111                         return err;
8112                 }
8113         }
8114
8115         wdev_lock(dev->ieee80211_ptr);
8116         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
8117         wdev_unlock(dev->ieee80211_ptr);
8118         if (err)
8119                 kzfree(connkeys);
8120         return err;
8121 }
8122
8123 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8124 {
8125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8126         struct net_device *dev = info->user_ptr[1];
8127         u16 reason;
8128         int ret;
8129
8130         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8131                 reason = WLAN_REASON_DEAUTH_LEAVING;
8132         else
8133                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8134
8135         if (reason == 0)
8136                 return -EINVAL;
8137
8138         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8139             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8140                 return -EOPNOTSUPP;
8141
8142         wdev_lock(dev->ieee80211_ptr);
8143         ret = cfg80211_disconnect(rdev, dev, reason, true);
8144         wdev_unlock(dev->ieee80211_ptr);
8145         return ret;
8146 }
8147
8148 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8149 {
8150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8151         struct net *net;
8152         int err;
8153
8154         if (info->attrs[NL80211_ATTR_PID]) {
8155                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8156
8157                 net = get_net_ns_by_pid(pid);
8158         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8159                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8160
8161                 net = get_net_ns_by_fd(fd);
8162         } else {
8163                 return -EINVAL;
8164         }
8165
8166         if (IS_ERR(net))
8167                 return PTR_ERR(net);
8168
8169         err = 0;
8170
8171         /* check if anything to do */
8172         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8173                 err = cfg80211_switch_netns(rdev, net);
8174
8175         put_net(net);
8176         return err;
8177 }
8178
8179 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8180 {
8181         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8182         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8183                         struct cfg80211_pmksa *pmksa) = NULL;
8184         struct net_device *dev = info->user_ptr[1];
8185         struct cfg80211_pmksa pmksa;
8186
8187         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8188
8189         if (!info->attrs[NL80211_ATTR_MAC])
8190                 return -EINVAL;
8191
8192         if (!info->attrs[NL80211_ATTR_PMKID])
8193                 return -EINVAL;
8194
8195         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8196         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8197
8198         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8199             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8200                 return -EOPNOTSUPP;
8201
8202         switch (info->genlhdr->cmd) {
8203         case NL80211_CMD_SET_PMKSA:
8204                 rdev_ops = rdev->ops->set_pmksa;
8205                 break;
8206         case NL80211_CMD_DEL_PMKSA:
8207                 rdev_ops = rdev->ops->del_pmksa;
8208                 break;
8209         default:
8210                 WARN_ON(1);
8211                 break;
8212         }
8213
8214         if (!rdev_ops)
8215                 return -EOPNOTSUPP;
8216
8217         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8218 }
8219
8220 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8221 {
8222         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8223         struct net_device *dev = info->user_ptr[1];
8224
8225         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8226             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8227                 return -EOPNOTSUPP;
8228
8229         if (!rdev->ops->flush_pmksa)
8230                 return -EOPNOTSUPP;
8231
8232         return rdev_flush_pmksa(rdev, dev);
8233 }
8234
8235 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8236 {
8237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8238         struct net_device *dev = info->user_ptr[1];
8239         u8 action_code, dialog_token;
8240         u32 peer_capability = 0;
8241         u16 status_code;
8242         u8 *peer;
8243         bool initiator;
8244
8245         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8246             !rdev->ops->tdls_mgmt)
8247                 return -EOPNOTSUPP;
8248
8249         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8250             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8251             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8252             !info->attrs[NL80211_ATTR_IE] ||
8253             !info->attrs[NL80211_ATTR_MAC])
8254                 return -EINVAL;
8255
8256         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8257         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8258         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8259         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8260         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8261         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8262                 peer_capability =
8263                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8264
8265         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8266                               dialog_token, status_code, peer_capability,
8267                               initiator,
8268                               nla_data(info->attrs[NL80211_ATTR_IE]),
8269                               nla_len(info->attrs[NL80211_ATTR_IE]));
8270 }
8271
8272 static int nl80211_tdls_oper(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         enum nl80211_tdls_operation operation;
8277         u8 *peer;
8278
8279         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8280             !rdev->ops->tdls_oper)
8281                 return -EOPNOTSUPP;
8282
8283         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8284             !info->attrs[NL80211_ATTR_MAC])
8285                 return -EINVAL;
8286
8287         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8288         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8289
8290         return rdev_tdls_oper(rdev, dev, peer, operation);
8291 }
8292
8293 static int nl80211_remain_on_channel(struct sk_buff *skb,
8294                                      struct genl_info *info)
8295 {
8296         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8297         struct wireless_dev *wdev = info->user_ptr[1];
8298         struct cfg80211_chan_def chandef;
8299         struct sk_buff *msg;
8300         void *hdr;
8301         u64 cookie;
8302         u32 duration;
8303         int err;
8304
8305         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8306             !info->attrs[NL80211_ATTR_DURATION])
8307                 return -EINVAL;
8308
8309         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8310
8311         if (!rdev->ops->remain_on_channel ||
8312             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8313                 return -EOPNOTSUPP;
8314
8315         /*
8316          * We should be on that channel for at least a minimum amount of
8317          * time (10ms) but no longer than the driver supports.
8318          */
8319         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8320             duration > rdev->wiphy.max_remain_on_channel_duration)
8321                 return -EINVAL;
8322
8323         err = nl80211_parse_chandef(rdev, info, &chandef);
8324         if (err)
8325                 return err;
8326
8327         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8328         if (!msg)
8329                 return -ENOMEM;
8330
8331         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8332                              NL80211_CMD_REMAIN_ON_CHANNEL);
8333         if (!hdr) {
8334                 err = -ENOBUFS;
8335                 goto free_msg;
8336         }
8337
8338         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8339                                      duration, &cookie);
8340
8341         if (err)
8342                 goto free_msg;
8343
8344         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8345                 goto nla_put_failure;
8346
8347         genlmsg_end(msg, hdr);
8348
8349         return genlmsg_reply(msg, info);
8350
8351  nla_put_failure:
8352         err = -ENOBUFS;
8353  free_msg:
8354         nlmsg_free(msg);
8355         return err;
8356 }
8357
8358 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8359                                             struct genl_info *info)
8360 {
8361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8362         struct wireless_dev *wdev = info->user_ptr[1];
8363         u64 cookie;
8364
8365         if (!info->attrs[NL80211_ATTR_COOKIE])
8366                 return -EINVAL;
8367
8368         if (!rdev->ops->cancel_remain_on_channel)
8369                 return -EOPNOTSUPP;
8370
8371         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8372
8373         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8374 }
8375
8376 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8377                            u8 *rates, u8 rates_len)
8378 {
8379         u8 i;
8380         u32 mask = 0;
8381
8382         for (i = 0; i < rates_len; i++) {
8383                 int rate = (rates[i] & 0x7f) * 5;
8384                 int ridx;
8385                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8386                         struct ieee80211_rate *srate =
8387                                 &sband->bitrates[ridx];
8388                         if (rate == srate->bitrate) {
8389                                 mask |= 1 << ridx;
8390                                 break;
8391                         }
8392                 }
8393                 if (ridx == sband->n_bitrates)
8394                         return 0; /* rate not found */
8395         }
8396
8397         return mask;
8398 }
8399
8400 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8401                                u8 *rates, u8 rates_len,
8402                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8403 {
8404         u8 i;
8405
8406         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8407
8408         for (i = 0; i < rates_len; i++) {
8409                 int ridx, rbit;
8410
8411                 ridx = rates[i] / 8;
8412                 rbit = BIT(rates[i] % 8);
8413
8414                 /* check validity */
8415                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8416                         return false;
8417
8418                 /* check availability */
8419                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8420                         mcs[ridx] |= rbit;
8421                 else
8422                         return false;
8423         }
8424
8425         return true;
8426 }
8427
8428 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8429 {
8430         u16 mcs_mask = 0;
8431
8432         switch (vht_mcs_map) {
8433         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8434                 break;
8435         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8436                 mcs_mask = 0x00FF;
8437                 break;
8438         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8439                 mcs_mask = 0x01FF;
8440                 break;
8441         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8442                 mcs_mask = 0x03FF;
8443                 break;
8444         default:
8445                 break;
8446         }
8447
8448         return mcs_mask;
8449 }
8450
8451 static void vht_build_mcs_mask(u16 vht_mcs_map,
8452                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8453 {
8454         u8 nss;
8455
8456         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8457                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8458                 vht_mcs_map >>= 2;
8459         }
8460 }
8461
8462 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8463                              struct nl80211_txrate_vht *txrate,
8464                              u16 mcs[NL80211_VHT_NSS_MAX])
8465 {
8466         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8467         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8468         u8 i;
8469
8470         if (!sband->vht_cap.vht_supported)
8471                 return false;
8472
8473         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8474
8475         /* Build vht_mcs_mask from VHT capabilities */
8476         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8477
8478         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8479                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8480                         mcs[i] = txrate->mcs[i];
8481                 else
8482                         return false;
8483         }
8484
8485         return true;
8486 }
8487
8488 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8489         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8490                                     .len = NL80211_MAX_SUPP_RATES },
8491         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8492                                 .len = NL80211_MAX_SUPP_HT_RATES },
8493         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8494         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8495 };
8496
8497 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8498                                        struct genl_info *info)
8499 {
8500         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8501         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8502         struct cfg80211_bitrate_mask mask;
8503         int rem, i;
8504         struct net_device *dev = info->user_ptr[1];
8505         struct nlattr *tx_rates;
8506         struct ieee80211_supported_band *sband;
8507         u16 vht_tx_mcs_map;
8508
8509         if (!rdev->ops->set_bitrate_mask)
8510                 return -EOPNOTSUPP;
8511
8512         memset(&mask, 0, sizeof(mask));
8513         /* Default to all rates enabled */
8514         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8515                 sband = rdev->wiphy.bands[i];
8516
8517                 if (!sband)
8518                         continue;
8519
8520                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8521                 memcpy(mask.control[i].ht_mcs,
8522                        sband->ht_cap.mcs.rx_mask,
8523                        sizeof(mask.control[i].ht_mcs));
8524
8525                 if (!sband->vht_cap.vht_supported)
8526                         continue;
8527
8528                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8529                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8530         }
8531
8532         /* if no rates are given set it back to the defaults */
8533         if (!info->attrs[NL80211_ATTR_TX_RATES])
8534                 goto out;
8535
8536         /*
8537          * The nested attribute uses enum nl80211_band as the index. This maps
8538          * directly to the enum ieee80211_band values used in cfg80211.
8539          */
8540         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8541         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8542                 enum ieee80211_band band = nla_type(tx_rates);
8543                 int err;
8544
8545                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8546                         return -EINVAL;
8547                 sband = rdev->wiphy.bands[band];
8548                 if (sband == NULL)
8549                         return -EINVAL;
8550                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8551                                 nla_len(tx_rates), nl80211_txattr_policy);
8552                 if (err)
8553                         return err;
8554                 if (tb[NL80211_TXRATE_LEGACY]) {
8555                         mask.control[band].legacy = rateset_to_mask(
8556                                 sband,
8557                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8558                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8559                         if ((mask.control[band].legacy == 0) &&
8560                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8561                                 return -EINVAL;
8562                 }
8563                 if (tb[NL80211_TXRATE_HT]) {
8564                         if (!ht_rateset_to_mask(
8565                                         sband,
8566                                         nla_data(tb[NL80211_TXRATE_HT]),
8567                                         nla_len(tb[NL80211_TXRATE_HT]),
8568                                         mask.control[band].ht_mcs))
8569                                 return -EINVAL;
8570                 }
8571                 if (tb[NL80211_TXRATE_VHT]) {
8572                         if (!vht_set_mcs_mask(
8573                                         sband,
8574                                         nla_data(tb[NL80211_TXRATE_VHT]),
8575                                         mask.control[band].vht_mcs))
8576                                 return -EINVAL;
8577                 }
8578                 if (tb[NL80211_TXRATE_GI]) {
8579                         mask.control[band].gi =
8580                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8581                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8582                                 return -EINVAL;
8583                 }
8584
8585                 if (mask.control[band].legacy == 0) {
8586                         /* don't allow empty legacy rates if HT or VHT
8587                          * are not even supported.
8588                          */
8589                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8590                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8591                                 return -EINVAL;
8592
8593                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8594                                 if (mask.control[band].ht_mcs[i])
8595                                         goto out;
8596
8597                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8598                                 if (mask.control[band].vht_mcs[i])
8599                                         goto out;
8600
8601                         /* legacy and mcs rates may not be both empty */
8602                         return -EINVAL;
8603                 }
8604         }
8605
8606 out:
8607         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8608 }
8609
8610 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8611 {
8612         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8613         struct wireless_dev *wdev = info->user_ptr[1];
8614         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8615
8616         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8617                 return -EINVAL;
8618
8619         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8620                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8621
8622         switch (wdev->iftype) {
8623         case NL80211_IFTYPE_STATION:
8624         case NL80211_IFTYPE_ADHOC:
8625         case NL80211_IFTYPE_P2P_CLIENT:
8626         case NL80211_IFTYPE_AP:
8627         case NL80211_IFTYPE_AP_VLAN:
8628         case NL80211_IFTYPE_MESH_POINT:
8629         case NL80211_IFTYPE_P2P_GO:
8630         case NL80211_IFTYPE_P2P_DEVICE:
8631                 break;
8632         default:
8633                 return -EOPNOTSUPP;
8634         }
8635
8636         /* not much point in registering if we can't reply */
8637         if (!rdev->ops->mgmt_tx)
8638                 return -EOPNOTSUPP;
8639
8640         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8641                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8642                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8643 }
8644
8645 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8646 {
8647         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8648         struct wireless_dev *wdev = info->user_ptr[1];
8649         struct cfg80211_chan_def chandef;
8650         int err;
8651         void *hdr = NULL;
8652         u64 cookie;
8653         struct sk_buff *msg = NULL;
8654         struct cfg80211_mgmt_tx_params params = {
8655                 .dont_wait_for_ack =
8656                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8657         };
8658
8659         if (!info->attrs[NL80211_ATTR_FRAME])
8660                 return -EINVAL;
8661
8662         if (!rdev->ops->mgmt_tx)
8663                 return -EOPNOTSUPP;
8664
8665         switch (wdev->iftype) {
8666         case NL80211_IFTYPE_P2P_DEVICE:
8667                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8668                         return -EINVAL;
8669         case NL80211_IFTYPE_STATION:
8670         case NL80211_IFTYPE_ADHOC:
8671         case NL80211_IFTYPE_P2P_CLIENT:
8672         case NL80211_IFTYPE_AP:
8673         case NL80211_IFTYPE_AP_VLAN:
8674         case NL80211_IFTYPE_MESH_POINT:
8675         case NL80211_IFTYPE_P2P_GO:
8676                 break;
8677         default:
8678                 return -EOPNOTSUPP;
8679         }
8680
8681         if (info->attrs[NL80211_ATTR_DURATION]) {
8682                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8683                         return -EINVAL;
8684                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8685
8686                 /*
8687                  * We should wait on the channel for at least a minimum amount
8688                  * of time (10ms) but no longer than the driver supports.
8689                  */
8690                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8691                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8692                         return -EINVAL;
8693
8694         }
8695
8696         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8697
8698         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8699                 return -EINVAL;
8700
8701         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8702
8703         /* get the channel if any has been specified, otherwise pass NULL to
8704          * the driver. The latter will use the current one
8705          */
8706         chandef.chan = NULL;
8707         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8708                 err = nl80211_parse_chandef(rdev, info, &chandef);
8709                 if (err)
8710                         return err;
8711         }
8712
8713         if (!chandef.chan && params.offchan)
8714                 return -EINVAL;
8715
8716         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8717         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8718
8719         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8720                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8721                 int i;
8722
8723                 if (len % sizeof(u16))
8724                         return -EINVAL;
8725
8726                 params.n_csa_offsets = len / sizeof(u16);
8727                 params.csa_offsets =
8728                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8729
8730                 /* check that all the offsets fit the frame */
8731                 for (i = 0; i < params.n_csa_offsets; i++) {
8732                         if (params.csa_offsets[i] >= params.len)
8733                                 return -EINVAL;
8734                 }
8735         }
8736
8737         if (!params.dont_wait_for_ack) {
8738                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8739                 if (!msg)
8740                         return -ENOMEM;
8741
8742                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8743                                      NL80211_CMD_FRAME);
8744                 if (!hdr) {
8745                         err = -ENOBUFS;
8746                         goto free_msg;
8747                 }
8748         }
8749
8750         params.chan = chandef.chan;
8751         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8752         if (err)
8753                 goto free_msg;
8754
8755         if (msg) {
8756                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8757                         goto nla_put_failure;
8758
8759                 genlmsg_end(msg, hdr);
8760                 return genlmsg_reply(msg, info);
8761         }
8762
8763         return 0;
8764
8765  nla_put_failure:
8766         err = -ENOBUFS;
8767  free_msg:
8768         nlmsg_free(msg);
8769         return err;
8770 }
8771
8772 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8773 {
8774         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8775         struct wireless_dev *wdev = info->user_ptr[1];
8776         u64 cookie;
8777
8778         if (!info->attrs[NL80211_ATTR_COOKIE])
8779                 return -EINVAL;
8780
8781         if (!rdev->ops->mgmt_tx_cancel_wait)
8782                 return -EOPNOTSUPP;
8783
8784         switch (wdev->iftype) {
8785         case NL80211_IFTYPE_STATION:
8786         case NL80211_IFTYPE_ADHOC:
8787         case NL80211_IFTYPE_P2P_CLIENT:
8788         case NL80211_IFTYPE_AP:
8789         case NL80211_IFTYPE_AP_VLAN:
8790         case NL80211_IFTYPE_P2P_GO:
8791         case NL80211_IFTYPE_P2P_DEVICE:
8792                 break;
8793         default:
8794                 return -EOPNOTSUPP;
8795         }
8796
8797         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8798
8799         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8800 }
8801
8802 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8803 {
8804         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8805         struct wireless_dev *wdev;
8806         struct net_device *dev = info->user_ptr[1];
8807         u8 ps_state;
8808         bool state;
8809         int err;
8810
8811         if (!info->attrs[NL80211_ATTR_PS_STATE])
8812                 return -EINVAL;
8813
8814         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8815
8816         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8817                 return -EINVAL;
8818
8819         wdev = dev->ieee80211_ptr;
8820
8821         if (!rdev->ops->set_power_mgmt)
8822                 return -EOPNOTSUPP;
8823
8824         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8825
8826         if (state == wdev->ps)
8827                 return 0;
8828
8829         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8830         if (!err)
8831                 wdev->ps = state;
8832         return err;
8833 }
8834
8835 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8836 {
8837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8838         enum nl80211_ps_state ps_state;
8839         struct wireless_dev *wdev;
8840         struct net_device *dev = info->user_ptr[1];
8841         struct sk_buff *msg;
8842         void *hdr;
8843         int err;
8844
8845         wdev = dev->ieee80211_ptr;
8846
8847         if (!rdev->ops->set_power_mgmt)
8848                 return -EOPNOTSUPP;
8849
8850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8851         if (!msg)
8852                 return -ENOMEM;
8853
8854         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8855                              NL80211_CMD_GET_POWER_SAVE);
8856         if (!hdr) {
8857                 err = -ENOBUFS;
8858                 goto free_msg;
8859         }
8860
8861         if (wdev->ps)
8862                 ps_state = NL80211_PS_ENABLED;
8863         else
8864                 ps_state = NL80211_PS_DISABLED;
8865
8866         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8867                 goto nla_put_failure;
8868
8869         genlmsg_end(msg, hdr);
8870         return genlmsg_reply(msg, info);
8871
8872  nla_put_failure:
8873         err = -ENOBUFS;
8874  free_msg:
8875         nlmsg_free(msg);
8876         return err;
8877 }
8878
8879 static const struct nla_policy
8880 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8881         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8882         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8883         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8884         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8885         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8886         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8887 };
8888
8889 static int nl80211_set_cqm_txe(struct genl_info *info,
8890                                u32 rate, u32 pkts, u32 intvl)
8891 {
8892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8893         struct net_device *dev = info->user_ptr[1];
8894         struct wireless_dev *wdev = dev->ieee80211_ptr;
8895
8896         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8897                 return -EINVAL;
8898
8899         if (!rdev->ops->set_cqm_txe_config)
8900                 return -EOPNOTSUPP;
8901
8902         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8903             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8904                 return -EOPNOTSUPP;
8905
8906         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8907 }
8908
8909 static int nl80211_set_cqm_rssi(struct genl_info *info,
8910                                 s32 threshold, u32 hysteresis)
8911 {
8912         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8913         struct net_device *dev = info->user_ptr[1];
8914         struct wireless_dev *wdev = dev->ieee80211_ptr;
8915
8916         if (threshold > 0)
8917                 return -EINVAL;
8918
8919         /* disabling - hysteresis should also be zero then */
8920         if (threshold == 0)
8921                 hysteresis = 0;
8922
8923         if (!rdev->ops->set_cqm_rssi_config)
8924                 return -EOPNOTSUPP;
8925
8926         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8927             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8928                 return -EOPNOTSUPP;
8929
8930         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8931 }
8932
8933 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8934 {
8935         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8936         struct nlattr *cqm;
8937         int err;
8938
8939         cqm = info->attrs[NL80211_ATTR_CQM];
8940         if (!cqm)
8941                 return -EINVAL;
8942
8943         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8944                                nl80211_attr_cqm_policy);
8945         if (err)
8946                 return err;
8947
8948         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8949             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8950                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8951                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8952
8953                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8954         }
8955
8956         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8957             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8958             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8959                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8960                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8961                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8962
8963                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8964         }
8965
8966         return -EINVAL;
8967 }
8968
8969 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8970 {
8971         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8972         struct net_device *dev = info->user_ptr[1];
8973         struct ocb_setup setup = {};
8974         int err;
8975
8976         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8977         if (err)
8978                 return err;
8979
8980         return cfg80211_join_ocb(rdev, dev, &setup);
8981 }
8982
8983 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8984 {
8985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8986         struct net_device *dev = info->user_ptr[1];
8987
8988         return cfg80211_leave_ocb(rdev, dev);
8989 }
8990
8991 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8992 {
8993         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8994         struct net_device *dev = info->user_ptr[1];
8995         struct mesh_config cfg;
8996         struct mesh_setup setup;
8997         int err;
8998
8999         /* start with default */
9000         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9001         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9002
9003         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9004                 /* and parse parameters if given */
9005                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9006                 if (err)
9007                         return err;
9008         }
9009
9010         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9011             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9012                 return -EINVAL;
9013
9014         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9015         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9016
9017         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9018             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9019                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9020                         return -EINVAL;
9021
9022         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9023                 setup.beacon_interval =
9024                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9025                 if (setup.beacon_interval < 10 ||
9026                     setup.beacon_interval > 10000)
9027                         return -EINVAL;
9028         }
9029
9030         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9031                 setup.dtim_period =
9032                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9033                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9034                         return -EINVAL;
9035         }
9036
9037         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9038                 /* parse additional setup parameters if given */
9039                 err = nl80211_parse_mesh_setup(info, &setup);
9040                 if (err)
9041                         return err;
9042         }
9043
9044         if (setup.user_mpm)
9045                 cfg.auto_open_plinks = false;
9046
9047         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9048                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9049                 if (err)
9050                         return err;
9051         } else {
9052                 /* cfg80211_join_mesh() will sort it out */
9053                 setup.chandef.chan = NULL;
9054         }
9055
9056         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9057                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9058                 int n_rates =
9059                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9060                 struct ieee80211_supported_band *sband;
9061
9062                 if (!setup.chandef.chan)
9063                         return -EINVAL;
9064
9065                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9066
9067                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9068                                              &setup.basic_rates);
9069                 if (err)
9070                         return err;
9071         }
9072
9073         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9074 }
9075
9076 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9077 {
9078         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9079         struct net_device *dev = info->user_ptr[1];
9080
9081         return cfg80211_leave_mesh(rdev, dev);
9082 }
9083
9084 #ifdef CONFIG_PM
9085 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9086                                         struct cfg80211_registered_device *rdev)
9087 {
9088         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9089         struct nlattr *nl_pats, *nl_pat;
9090         int i, pat_len;
9091
9092         if (!wowlan->n_patterns)
9093                 return 0;
9094
9095         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9096         if (!nl_pats)
9097                 return -ENOBUFS;
9098
9099         for (i = 0; i < wowlan->n_patterns; i++) {
9100                 nl_pat = nla_nest_start(msg, i + 1);
9101                 if (!nl_pat)
9102                         return -ENOBUFS;
9103                 pat_len = wowlan->patterns[i].pattern_len;
9104                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9105                             wowlan->patterns[i].mask) ||
9106                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9107                             wowlan->patterns[i].pattern) ||
9108                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9109                                 wowlan->patterns[i].pkt_offset))
9110                         return -ENOBUFS;
9111                 nla_nest_end(msg, nl_pat);
9112         }
9113         nla_nest_end(msg, nl_pats);
9114
9115         return 0;
9116 }
9117
9118 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9119                                    struct cfg80211_wowlan_tcp *tcp)
9120 {
9121         struct nlattr *nl_tcp;
9122
9123         if (!tcp)
9124                 return 0;
9125
9126         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9127         if (!nl_tcp)
9128                 return -ENOBUFS;
9129
9130         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9131             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9132             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9133             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9134             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9135             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9136                     tcp->payload_len, tcp->payload) ||
9137             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9138                         tcp->data_interval) ||
9139             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9140                     tcp->wake_len, tcp->wake_data) ||
9141             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9142                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9143                 return -ENOBUFS;
9144
9145         if (tcp->payload_seq.len &&
9146             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9147                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9148                 return -ENOBUFS;
9149
9150         if (tcp->payload_tok.len &&
9151             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9152                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9153                     &tcp->payload_tok))
9154                 return -ENOBUFS;
9155
9156         nla_nest_end(msg, nl_tcp);
9157
9158         return 0;
9159 }
9160
9161 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9162                                   struct cfg80211_sched_scan_request *req)
9163 {
9164         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9165         int i;
9166
9167         if (!req)
9168                 return 0;
9169
9170         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9171         if (!nd)
9172                 return -ENOBUFS;
9173
9174         if (req->n_scan_plans == 1 &&
9175             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9176                         req->scan_plans[0].interval * 1000))
9177                 return -ENOBUFS;
9178
9179         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9180                 return -ENOBUFS;
9181
9182         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9183         if (!freqs)
9184                 return -ENOBUFS;
9185
9186         for (i = 0; i < req->n_channels; i++)
9187                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9188
9189         nla_nest_end(msg, freqs);
9190
9191         if (req->n_match_sets) {
9192                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9193                 for (i = 0; i < req->n_match_sets; i++) {
9194                         match = nla_nest_start(msg, i);
9195                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9196                                 req->match_sets[i].ssid.ssid_len,
9197                                 req->match_sets[i].ssid.ssid);
9198                         nla_nest_end(msg, match);
9199                 }
9200                 nla_nest_end(msg, matches);
9201         }
9202
9203         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9204         if (!scan_plans)
9205                 return -ENOBUFS;
9206
9207         for (i = 0; i < req->n_scan_plans; i++) {
9208                 scan_plan = nla_nest_start(msg, i + 1);
9209                 if (!scan_plan ||
9210                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9211                                 req->scan_plans[i].interval) ||
9212                     (req->scan_plans[i].iterations &&
9213                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9214                                  req->scan_plans[i].iterations)))
9215                         return -ENOBUFS;
9216                 nla_nest_end(msg, scan_plan);
9217         }
9218         nla_nest_end(msg, scan_plans);
9219
9220         nla_nest_end(msg, nd);
9221
9222         return 0;
9223 }
9224
9225 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9226 {
9227         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9228         struct sk_buff *msg;
9229         void *hdr;
9230         u32 size = NLMSG_DEFAULT_SIZE;
9231
9232         if (!rdev->wiphy.wowlan)
9233                 return -EOPNOTSUPP;
9234
9235         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9236                 /* adjust size to have room for all the data */
9237                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9238                         rdev->wiphy.wowlan_config->tcp->payload_len +
9239                         rdev->wiphy.wowlan_config->tcp->wake_len +
9240                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9241         }
9242
9243         msg = nlmsg_new(size, GFP_KERNEL);
9244         if (!msg)
9245                 return -ENOMEM;
9246
9247         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9248                              NL80211_CMD_GET_WOWLAN);
9249         if (!hdr)
9250                 goto nla_put_failure;
9251
9252         if (rdev->wiphy.wowlan_config) {
9253                 struct nlattr *nl_wowlan;
9254
9255                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9256                 if (!nl_wowlan)
9257                         goto nla_put_failure;
9258
9259                 if ((rdev->wiphy.wowlan_config->any &&
9260                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9261                     (rdev->wiphy.wowlan_config->disconnect &&
9262                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9263                     (rdev->wiphy.wowlan_config->magic_pkt &&
9264                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9265                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9266                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9267                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9268                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9269                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9270                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9271                     (rdev->wiphy.wowlan_config->rfkill_release &&
9272                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9273                         goto nla_put_failure;
9274
9275                 if (nl80211_send_wowlan_patterns(msg, rdev))
9276                         goto nla_put_failure;
9277
9278                 if (nl80211_send_wowlan_tcp(msg,
9279                                             rdev->wiphy.wowlan_config->tcp))
9280                         goto nla_put_failure;
9281
9282                 if (nl80211_send_wowlan_nd(
9283                             msg,
9284                             rdev->wiphy.wowlan_config->nd_config))
9285                         goto nla_put_failure;
9286
9287                 nla_nest_end(msg, nl_wowlan);
9288         }
9289
9290         genlmsg_end(msg, hdr);
9291         return genlmsg_reply(msg, info);
9292
9293 nla_put_failure:
9294         nlmsg_free(msg);
9295         return -ENOBUFS;
9296 }
9297
9298 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9299                                     struct nlattr *attr,
9300                                     struct cfg80211_wowlan *trig)
9301 {
9302         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9303         struct cfg80211_wowlan_tcp *cfg;
9304         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9305         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9306         u32 size;
9307         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9308         int err, port;
9309
9310         if (!rdev->wiphy.wowlan->tcp)
9311                 return -EINVAL;
9312
9313         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9314                         nla_data(attr), nla_len(attr),
9315                         nl80211_wowlan_tcp_policy);
9316         if (err)
9317                 return err;
9318
9319         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9320             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9321             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9322             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9323             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9324             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9325             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9326             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9327                 return -EINVAL;
9328
9329         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9330         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9331                 return -EINVAL;
9332
9333         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9334                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9335             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9336                 return -EINVAL;
9337
9338         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9339         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9340                 return -EINVAL;
9341
9342         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9343         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9344                 return -EINVAL;
9345
9346         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9347                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9348
9349                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9350                 tokens_size = tokln - sizeof(*tok);
9351
9352                 if (!tok->len || tokens_size % tok->len)
9353                         return -EINVAL;
9354                 if (!rdev->wiphy.wowlan->tcp->tok)
9355                         return -EINVAL;
9356                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9357                         return -EINVAL;
9358                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9359                         return -EINVAL;
9360                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9361                         return -EINVAL;
9362                 if (tok->offset + tok->len > data_size)
9363                         return -EINVAL;
9364         }
9365
9366         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9367                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9368                 if (!rdev->wiphy.wowlan->tcp->seq)
9369                         return -EINVAL;
9370                 if (seq->len == 0 || seq->len > 4)
9371                         return -EINVAL;
9372                 if (seq->len + seq->offset > data_size)
9373                         return -EINVAL;
9374         }
9375
9376         size = sizeof(*cfg);
9377         size += data_size;
9378         size += wake_size + wake_mask_size;
9379         size += tokens_size;
9380
9381         cfg = kzalloc(size, GFP_KERNEL);
9382         if (!cfg)
9383                 return -ENOMEM;
9384         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9385         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9386         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9387                ETH_ALEN);
9388         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9389                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9390         else
9391                 port = 0;
9392 #ifdef CONFIG_INET
9393         /* allocate a socket and port for it and use it */
9394         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9395                             IPPROTO_TCP, &cfg->sock, 1);
9396         if (err) {
9397                 kfree(cfg);
9398                 return err;
9399         }
9400         if (inet_csk_get_port(cfg->sock->sk, port)) {
9401                 sock_release(cfg->sock);
9402                 kfree(cfg);
9403                 return -EADDRINUSE;
9404         }
9405         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9406 #else
9407         if (!port) {
9408                 kfree(cfg);
9409                 return -EINVAL;
9410         }
9411         cfg->src_port = port;
9412 #endif
9413
9414         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9415         cfg->payload_len = data_size;
9416         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9417         memcpy((void *)cfg->payload,
9418                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9419                data_size);
9420         if (seq)
9421                 cfg->payload_seq = *seq;
9422         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9423         cfg->wake_len = wake_size;
9424         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9425         memcpy((void *)cfg->wake_data,
9426                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9427                wake_size);
9428         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9429                          data_size + wake_size;
9430         memcpy((void *)cfg->wake_mask,
9431                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9432                wake_mask_size);
9433         if (tok) {
9434                 cfg->tokens_size = tokens_size;
9435                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9436         }
9437
9438         trig->tcp = cfg;
9439
9440         return 0;
9441 }
9442
9443 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9444                                    const struct wiphy_wowlan_support *wowlan,
9445                                    struct nlattr *attr,
9446                                    struct cfg80211_wowlan *trig)
9447 {
9448         struct nlattr **tb;
9449         int err;
9450
9451         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9452         if (!tb)
9453                 return -ENOMEM;
9454
9455         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9456                 err = -EOPNOTSUPP;
9457                 goto out;
9458         }
9459
9460         err = nla_parse(tb, NL80211_ATTR_MAX,
9461                         nla_data(attr), nla_len(attr),
9462                         nl80211_policy);
9463         if (err)
9464                 goto out;
9465
9466         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9467         err = PTR_ERR_OR_ZERO(trig->nd_config);
9468         if (err)
9469                 trig->nd_config = NULL;
9470
9471 out:
9472         kfree(tb);
9473         return err;
9474 }
9475
9476 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9477 {
9478         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9479         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9480         struct cfg80211_wowlan new_triggers = {};
9481         struct cfg80211_wowlan *ntrig;
9482         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9483         int err, i;
9484         bool prev_enabled = rdev->wiphy.wowlan_config;
9485         bool regular = false;
9486
9487         if (!wowlan)
9488                 return -EOPNOTSUPP;
9489
9490         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9491                 cfg80211_rdev_free_wowlan(rdev);
9492                 rdev->wiphy.wowlan_config = NULL;
9493                 goto set_wakeup;
9494         }
9495
9496         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9497                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9498                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9499                         nl80211_wowlan_policy);
9500         if (err)
9501                 return err;
9502
9503         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9504                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9505                         return -EINVAL;
9506                 new_triggers.any = true;
9507         }
9508
9509         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9510                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9511                         return -EINVAL;
9512                 new_triggers.disconnect = true;
9513                 regular = true;
9514         }
9515
9516         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9517                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9518                         return -EINVAL;
9519                 new_triggers.magic_pkt = true;
9520                 regular = true;
9521         }
9522
9523         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9524                 return -EINVAL;
9525
9526         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9527                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9528                         return -EINVAL;
9529                 new_triggers.gtk_rekey_failure = true;
9530                 regular = true;
9531         }
9532
9533         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9534                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9535                         return -EINVAL;
9536                 new_triggers.eap_identity_req = true;
9537                 regular = true;
9538         }
9539
9540         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9541                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9542                         return -EINVAL;
9543                 new_triggers.four_way_handshake = true;
9544                 regular = true;
9545         }
9546
9547         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9548                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9549                         return -EINVAL;
9550                 new_triggers.rfkill_release = true;
9551                 regular = true;
9552         }
9553
9554         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9555                 struct nlattr *pat;
9556                 int n_patterns = 0;
9557                 int rem, pat_len, mask_len, pkt_offset;
9558                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9559
9560                 regular = true;
9561
9562                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9563                                     rem)
9564                         n_patterns++;
9565                 if (n_patterns > wowlan->n_patterns)
9566                         return -EINVAL;
9567
9568                 new_triggers.patterns = kcalloc(n_patterns,
9569                                                 sizeof(new_triggers.patterns[0]),
9570                                                 GFP_KERNEL);
9571                 if (!new_triggers.patterns)
9572                         return -ENOMEM;
9573
9574                 new_triggers.n_patterns = n_patterns;
9575                 i = 0;
9576
9577                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9578                                     rem) {
9579                         u8 *mask_pat;
9580
9581                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9582                                   nla_len(pat), NULL);
9583                         err = -EINVAL;
9584                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9585                             !pat_tb[NL80211_PKTPAT_PATTERN])
9586                                 goto error;
9587                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9588                         mask_len = DIV_ROUND_UP(pat_len, 8);
9589                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9590                                 goto error;
9591                         if (pat_len > wowlan->pattern_max_len ||
9592                             pat_len < wowlan->pattern_min_len)
9593                                 goto error;
9594
9595                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9596                                 pkt_offset = 0;
9597                         else
9598                                 pkt_offset = nla_get_u32(
9599                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9600                         if (pkt_offset > wowlan->max_pkt_offset)
9601                                 goto error;
9602                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9603
9604                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9605                         if (!mask_pat) {
9606                                 err = -ENOMEM;
9607                                 goto error;
9608                         }
9609                         new_triggers.patterns[i].mask = mask_pat;
9610                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9611                                mask_len);
9612                         mask_pat += mask_len;
9613                         new_triggers.patterns[i].pattern = mask_pat;
9614                         new_triggers.patterns[i].pattern_len = pat_len;
9615                         memcpy(mask_pat,
9616                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9617                                pat_len);
9618                         i++;
9619                 }
9620         }
9621
9622         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9623                 regular = true;
9624                 err = nl80211_parse_wowlan_tcp(
9625                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9626                         &new_triggers);
9627                 if (err)
9628                         goto error;
9629         }
9630
9631         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9632                 regular = true;
9633                 err = nl80211_parse_wowlan_nd(
9634                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9635                         &new_triggers);
9636                 if (err)
9637                         goto error;
9638         }
9639
9640         /* The 'any' trigger means the device continues operating more or less
9641          * as in its normal operation mode and wakes up the host on most of the
9642          * normal interrupts (like packet RX, ...)
9643          * It therefore makes little sense to combine with the more constrained
9644          * wakeup trigger modes.
9645          */
9646         if (new_triggers.any && regular) {
9647                 err = -EINVAL;
9648                 goto error;
9649         }
9650
9651         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9652         if (!ntrig) {
9653                 err = -ENOMEM;
9654                 goto error;
9655         }
9656         cfg80211_rdev_free_wowlan(rdev);
9657         rdev->wiphy.wowlan_config = ntrig;
9658
9659  set_wakeup:
9660         if (rdev->ops->set_wakeup &&
9661             prev_enabled != !!rdev->wiphy.wowlan_config)
9662                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9663
9664         return 0;
9665  error:
9666         for (i = 0; i < new_triggers.n_patterns; i++)
9667                 kfree(new_triggers.patterns[i].mask);
9668         kfree(new_triggers.patterns);
9669         if (new_triggers.tcp && new_triggers.tcp->sock)
9670                 sock_release(new_triggers.tcp->sock);
9671         kfree(new_triggers.tcp);
9672         kfree(new_triggers.nd_config);
9673         return err;
9674 }
9675 #endif
9676
9677 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9678                                        struct cfg80211_registered_device *rdev)
9679 {
9680         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9681         int i, j, pat_len;
9682         struct cfg80211_coalesce_rules *rule;
9683
9684         if (!rdev->coalesce->n_rules)
9685                 return 0;
9686
9687         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9688         if (!nl_rules)
9689                 return -ENOBUFS;
9690
9691         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9692                 nl_rule = nla_nest_start(msg, i + 1);
9693                 if (!nl_rule)
9694                         return -ENOBUFS;
9695
9696                 rule = &rdev->coalesce->rules[i];
9697                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9698                                 rule->delay))
9699                         return -ENOBUFS;
9700
9701                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9702                                 rule->condition))
9703                         return -ENOBUFS;
9704
9705                 nl_pats = nla_nest_start(msg,
9706                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9707                 if (!nl_pats)
9708                         return -ENOBUFS;
9709
9710                 for (j = 0; j < rule->n_patterns; j++) {
9711                         nl_pat = nla_nest_start(msg, j + 1);
9712                         if (!nl_pat)
9713                                 return -ENOBUFS;
9714                         pat_len = rule->patterns[j].pattern_len;
9715                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9716                                     DIV_ROUND_UP(pat_len, 8),
9717                                     rule->patterns[j].mask) ||
9718                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9719                                     rule->patterns[j].pattern) ||
9720                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9721                                         rule->patterns[j].pkt_offset))
9722                                 return -ENOBUFS;
9723                         nla_nest_end(msg, nl_pat);
9724                 }
9725                 nla_nest_end(msg, nl_pats);
9726                 nla_nest_end(msg, nl_rule);
9727         }
9728         nla_nest_end(msg, nl_rules);
9729
9730         return 0;
9731 }
9732
9733 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9734 {
9735         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9736         struct sk_buff *msg;
9737         void *hdr;
9738
9739         if (!rdev->wiphy.coalesce)
9740                 return -EOPNOTSUPP;
9741
9742         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9743         if (!msg)
9744                 return -ENOMEM;
9745
9746         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9747                              NL80211_CMD_GET_COALESCE);
9748         if (!hdr)
9749                 goto nla_put_failure;
9750
9751         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9752                 goto nla_put_failure;
9753
9754         genlmsg_end(msg, hdr);
9755         return genlmsg_reply(msg, info);
9756
9757 nla_put_failure:
9758         nlmsg_free(msg);
9759         return -ENOBUFS;
9760 }
9761
9762 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9763 {
9764         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9765         int i, j;
9766         struct cfg80211_coalesce_rules *rule;
9767
9768         if (!coalesce)
9769                 return;
9770
9771         for (i = 0; i < coalesce->n_rules; i++) {
9772                 rule = &coalesce->rules[i];
9773                 for (j = 0; j < rule->n_patterns; j++)
9774                         kfree(rule->patterns[j].mask);
9775                 kfree(rule->patterns);
9776         }
9777         kfree(coalesce->rules);
9778         kfree(coalesce);
9779         rdev->coalesce = NULL;
9780 }
9781
9782 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9783                                        struct nlattr *rule,
9784                                        struct cfg80211_coalesce_rules *new_rule)
9785 {
9786         int err, i;
9787         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9788         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9789         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9790         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9791
9792         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9793                         nla_len(rule), nl80211_coalesce_policy);
9794         if (err)
9795                 return err;
9796
9797         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9798                 new_rule->delay =
9799                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9800         if (new_rule->delay > coalesce->max_delay)
9801                 return -EINVAL;
9802
9803         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9804                 new_rule->condition =
9805                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9806         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9807             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9808                 return -EINVAL;
9809
9810         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9811                 return -EINVAL;
9812
9813         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9814                             rem)
9815                 n_patterns++;
9816         if (n_patterns > coalesce->n_patterns)
9817                 return -EINVAL;
9818
9819         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9820                                      GFP_KERNEL);
9821         if (!new_rule->patterns)
9822                 return -ENOMEM;
9823
9824         new_rule->n_patterns = n_patterns;
9825         i = 0;
9826
9827         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9828                             rem) {
9829                 u8 *mask_pat;
9830
9831                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9832                           nla_len(pat), NULL);
9833                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9834                     !pat_tb[NL80211_PKTPAT_PATTERN])
9835                         return -EINVAL;
9836                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9837                 mask_len = DIV_ROUND_UP(pat_len, 8);
9838                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9839                         return -EINVAL;
9840                 if (pat_len > coalesce->pattern_max_len ||
9841                     pat_len < coalesce->pattern_min_len)
9842                         return -EINVAL;
9843
9844                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9845                         pkt_offset = 0;
9846                 else
9847                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9848                 if (pkt_offset > coalesce->max_pkt_offset)
9849                         return -EINVAL;
9850                 new_rule->patterns[i].pkt_offset = pkt_offset;
9851
9852                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9853                 if (!mask_pat)
9854                         return -ENOMEM;
9855
9856                 new_rule->patterns[i].mask = mask_pat;
9857                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9858                        mask_len);
9859
9860                 mask_pat += mask_len;
9861                 new_rule->patterns[i].pattern = mask_pat;
9862                 new_rule->patterns[i].pattern_len = pat_len;
9863                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9864                        pat_len);
9865                 i++;
9866         }
9867
9868         return 0;
9869 }
9870
9871 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9872 {
9873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9874         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9875         struct cfg80211_coalesce new_coalesce = {};
9876         struct cfg80211_coalesce *n_coalesce;
9877         int err, rem_rule, n_rules = 0, i, j;
9878         struct nlattr *rule;
9879         struct cfg80211_coalesce_rules *tmp_rule;
9880
9881         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9882                 return -EOPNOTSUPP;
9883
9884         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9885                 cfg80211_rdev_free_coalesce(rdev);
9886                 rdev_set_coalesce(rdev, NULL);
9887                 return 0;
9888         }
9889
9890         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9891                             rem_rule)
9892                 n_rules++;
9893         if (n_rules > coalesce->n_rules)
9894                 return -EINVAL;
9895
9896         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9897                                      GFP_KERNEL);
9898         if (!new_coalesce.rules)
9899                 return -ENOMEM;
9900
9901         new_coalesce.n_rules = n_rules;
9902         i = 0;
9903
9904         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9905                             rem_rule) {
9906                 err = nl80211_parse_coalesce_rule(rdev, rule,
9907                                                   &new_coalesce.rules[i]);
9908                 if (err)
9909                         goto error;
9910
9911                 i++;
9912         }
9913
9914         err = rdev_set_coalesce(rdev, &new_coalesce);
9915         if (err)
9916                 goto error;
9917
9918         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9919         if (!n_coalesce) {
9920                 err = -ENOMEM;
9921                 goto error;
9922         }
9923         cfg80211_rdev_free_coalesce(rdev);
9924         rdev->coalesce = n_coalesce;
9925
9926         return 0;
9927 error:
9928         for (i = 0; i < new_coalesce.n_rules; i++) {
9929                 tmp_rule = &new_coalesce.rules[i];
9930                 for (j = 0; j < tmp_rule->n_patterns; j++)
9931                         kfree(tmp_rule->patterns[j].mask);
9932                 kfree(tmp_rule->patterns);
9933         }
9934         kfree(new_coalesce.rules);
9935
9936         return err;
9937 }
9938
9939 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9940 {
9941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9942         struct net_device *dev = info->user_ptr[1];
9943         struct wireless_dev *wdev = dev->ieee80211_ptr;
9944         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9945         struct cfg80211_gtk_rekey_data rekey_data;
9946         int err;
9947
9948         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9949                 return -EINVAL;
9950
9951         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9952                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9953                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9954                         nl80211_rekey_policy);
9955         if (err)
9956                 return err;
9957
9958         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9959                 return -ERANGE;
9960         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9961                 return -ERANGE;
9962         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9963                 return -ERANGE;
9964
9965         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9966         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9967         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9968
9969         wdev_lock(wdev);
9970         if (!wdev->current_bss) {
9971                 err = -ENOTCONN;
9972                 goto out;
9973         }
9974
9975         if (!rdev->ops->set_rekey_data) {
9976                 err = -EOPNOTSUPP;
9977                 goto out;
9978         }
9979
9980         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9981  out:
9982         wdev_unlock(wdev);
9983         return err;
9984 }
9985
9986 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9987                                              struct genl_info *info)
9988 {
9989         struct net_device *dev = info->user_ptr[1];
9990         struct wireless_dev *wdev = dev->ieee80211_ptr;
9991
9992         if (wdev->iftype != NL80211_IFTYPE_AP &&
9993             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9994                 return -EINVAL;
9995
9996         if (wdev->ap_unexpected_nlportid)
9997                 return -EBUSY;
9998
9999         wdev->ap_unexpected_nlportid = info->snd_portid;
10000         return 0;
10001 }
10002
10003 static int nl80211_probe_client(struct sk_buff *skb,
10004                                 struct genl_info *info)
10005 {
10006         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10007         struct net_device *dev = info->user_ptr[1];
10008         struct wireless_dev *wdev = dev->ieee80211_ptr;
10009         struct sk_buff *msg;
10010         void *hdr;
10011         const u8 *addr;
10012         u64 cookie;
10013         int err;
10014
10015         if (wdev->iftype != NL80211_IFTYPE_AP &&
10016             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10017                 return -EOPNOTSUPP;
10018
10019         if (!info->attrs[NL80211_ATTR_MAC])
10020                 return -EINVAL;
10021
10022         if (!rdev->ops->probe_client)
10023                 return -EOPNOTSUPP;
10024
10025         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10026         if (!msg)
10027                 return -ENOMEM;
10028
10029         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10030                              NL80211_CMD_PROBE_CLIENT);
10031         if (!hdr) {
10032                 err = -ENOBUFS;
10033                 goto free_msg;
10034         }
10035
10036         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10037
10038         err = rdev_probe_client(rdev, dev, addr, &cookie);
10039         if (err)
10040                 goto free_msg;
10041
10042         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10043                 goto nla_put_failure;
10044
10045         genlmsg_end(msg, hdr);
10046
10047         return genlmsg_reply(msg, info);
10048
10049  nla_put_failure:
10050         err = -ENOBUFS;
10051  free_msg:
10052         nlmsg_free(msg);
10053         return err;
10054 }
10055
10056 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10057 {
10058         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10059         struct cfg80211_beacon_registration *reg, *nreg;
10060         int rv;
10061
10062         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10063                 return -EOPNOTSUPP;
10064
10065         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10066         if (!nreg)
10067                 return -ENOMEM;
10068
10069         /* First, check if already registered. */
10070         spin_lock_bh(&rdev->beacon_registrations_lock);
10071         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10072                 if (reg->nlportid == info->snd_portid) {
10073                         rv = -EALREADY;
10074                         goto out_err;
10075                 }
10076         }
10077         /* Add it to the list */
10078         nreg->nlportid = info->snd_portid;
10079         list_add(&nreg->list, &rdev->beacon_registrations);
10080
10081         spin_unlock_bh(&rdev->beacon_registrations_lock);
10082
10083         return 0;
10084 out_err:
10085         spin_unlock_bh(&rdev->beacon_registrations_lock);
10086         kfree(nreg);
10087         return rv;
10088 }
10089
10090 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10091 {
10092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10093         struct wireless_dev *wdev = info->user_ptr[1];
10094         int err;
10095
10096         if (!rdev->ops->start_p2p_device)
10097                 return -EOPNOTSUPP;
10098
10099         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10100                 return -EOPNOTSUPP;
10101
10102         if (wdev->p2p_started)
10103                 return 0;
10104
10105         if (rfkill_blocked(rdev->rfkill))
10106                 return -ERFKILL;
10107
10108         err = rdev_start_p2p_device(rdev, wdev);
10109         if (err)
10110                 return err;
10111
10112         wdev->p2p_started = true;
10113         rdev->opencount++;
10114
10115         return 0;
10116 }
10117
10118 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10119 {
10120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10121         struct wireless_dev *wdev = info->user_ptr[1];
10122
10123         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10124                 return -EOPNOTSUPP;
10125
10126         if (!rdev->ops->stop_p2p_device)
10127                 return -EOPNOTSUPP;
10128
10129         cfg80211_stop_p2p_device(rdev, wdev);
10130
10131         return 0;
10132 }
10133
10134 static int nl80211_get_protocol_features(struct sk_buff *skb,
10135                                          struct genl_info *info)
10136 {
10137         void *hdr;
10138         struct sk_buff *msg;
10139
10140         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10141         if (!msg)
10142                 return -ENOMEM;
10143
10144         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10145                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10146         if (!hdr)
10147                 goto nla_put_failure;
10148
10149         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10150                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10151                 goto nla_put_failure;
10152
10153         genlmsg_end(msg, hdr);
10154         return genlmsg_reply(msg, info);
10155
10156  nla_put_failure:
10157         kfree_skb(msg);
10158         return -ENOBUFS;
10159 }
10160
10161 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10162 {
10163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10164         struct cfg80211_update_ft_ies_params ft_params;
10165         struct net_device *dev = info->user_ptr[1];
10166
10167         if (!rdev->ops->update_ft_ies)
10168                 return -EOPNOTSUPP;
10169
10170         if (!info->attrs[NL80211_ATTR_MDID] ||
10171             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10172                 return -EINVAL;
10173
10174         memset(&ft_params, 0, sizeof(ft_params));
10175         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10176         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10177         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10178
10179         return rdev_update_ft_ies(rdev, dev, &ft_params);
10180 }
10181
10182 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10183                                        struct genl_info *info)
10184 {
10185         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10186         struct wireless_dev *wdev = info->user_ptr[1];
10187         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10188         u16 duration;
10189         int ret;
10190
10191         if (!rdev->ops->crit_proto_start)
10192                 return -EOPNOTSUPP;
10193
10194         if (WARN_ON(!rdev->ops->crit_proto_stop))
10195                 return -EINVAL;
10196
10197         if (rdev->crit_proto_nlportid)
10198                 return -EBUSY;
10199
10200         /* determine protocol if provided */
10201         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10202                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10203
10204         if (proto >= NUM_NL80211_CRIT_PROTO)
10205                 return -EINVAL;
10206
10207         /* timeout must be provided */
10208         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10209                 return -EINVAL;
10210
10211         duration =
10212                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10213
10214         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10215                 return -ERANGE;
10216
10217         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10218         if (!ret)
10219                 rdev->crit_proto_nlportid = info->snd_portid;
10220
10221         return ret;
10222 }
10223
10224 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10225                                       struct genl_info *info)
10226 {
10227         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10228         struct wireless_dev *wdev = info->user_ptr[1];
10229
10230         if (!rdev->ops->crit_proto_stop)
10231                 return -EOPNOTSUPP;
10232
10233         if (rdev->crit_proto_nlportid) {
10234                 rdev->crit_proto_nlportid = 0;
10235                 rdev_crit_proto_stop(rdev, wdev);
10236         }
10237         return 0;
10238 }
10239
10240 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10241 {
10242         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10243         struct wireless_dev *wdev =
10244                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10245         int i, err;
10246         u32 vid, subcmd;
10247
10248         if (!rdev->wiphy.vendor_commands)
10249                 return -EOPNOTSUPP;
10250
10251         if (IS_ERR(wdev)) {
10252                 err = PTR_ERR(wdev);
10253                 if (err != -EINVAL)
10254                         return err;
10255                 wdev = NULL;
10256         } else if (wdev->wiphy != &rdev->wiphy) {
10257                 return -EINVAL;
10258         }
10259
10260         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10261             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10262                 return -EINVAL;
10263
10264         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10265         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10266         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10267                 const struct wiphy_vendor_command *vcmd;
10268                 void *data = NULL;
10269                 int len = 0;
10270
10271                 vcmd = &rdev->wiphy.vendor_commands[i];
10272
10273                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10274                         continue;
10275
10276                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10277                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10278                         if (!wdev)
10279                                 return -EINVAL;
10280                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10281                             !wdev->netdev)
10282                                 return -EINVAL;
10283
10284                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10285                                 if (wdev->netdev &&
10286                                     !netif_running(wdev->netdev))
10287                                         return -ENETDOWN;
10288                                 if (!wdev->netdev && !wdev->p2p_started)
10289                                         return -ENETDOWN;
10290                         }
10291
10292                         if (!vcmd->doit)
10293                                 return -EOPNOTSUPP;
10294                 } else {
10295                         wdev = NULL;
10296                 }
10297
10298                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10299                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10300                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10301                 }
10302
10303                 rdev->cur_cmd_info = info;
10304                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10305                                                           data, len);
10306                 rdev->cur_cmd_info = NULL;
10307                 return err;
10308         }
10309
10310         return -EOPNOTSUPP;
10311 }
10312
10313 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10314                                        struct netlink_callback *cb,
10315                                        struct cfg80211_registered_device **rdev,
10316                                        struct wireless_dev **wdev)
10317 {
10318         u32 vid, subcmd;
10319         unsigned int i;
10320         int vcmd_idx = -1;
10321         int err;
10322         void *data = NULL;
10323         unsigned int data_len = 0;
10324
10325         rtnl_lock();
10326
10327         if (cb->args[0]) {
10328                 /* subtract the 1 again here */
10329                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10330                 struct wireless_dev *tmp;
10331
10332                 if (!wiphy) {
10333                         err = -ENODEV;
10334                         goto out_unlock;
10335                 }
10336                 *rdev = wiphy_to_rdev(wiphy);
10337                 *wdev = NULL;
10338
10339                 if (cb->args[1]) {
10340                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10341                                 if (tmp->identifier == cb->args[1] - 1) {
10342                                         *wdev = tmp;
10343                                         break;
10344                                 }
10345                         }
10346                 }
10347
10348                 /* keep rtnl locked in successful case */
10349                 return 0;
10350         }
10351
10352         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10353                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10354                           nl80211_policy);
10355         if (err)
10356                 goto out_unlock;
10357
10358         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10359             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10360                 err = -EINVAL;
10361                 goto out_unlock;
10362         }
10363
10364         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10365                                            nl80211_fam.attrbuf);
10366         if (IS_ERR(*wdev))
10367                 *wdev = NULL;
10368
10369         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10370                                            nl80211_fam.attrbuf);
10371         if (IS_ERR(*rdev)) {
10372                 err = PTR_ERR(*rdev);
10373                 goto out_unlock;
10374         }
10375
10376         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10377         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10378
10379         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10380                 const struct wiphy_vendor_command *vcmd;
10381
10382                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10383
10384                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10385                         continue;
10386
10387                 if (!vcmd->dumpit) {
10388                         err = -EOPNOTSUPP;
10389                         goto out_unlock;
10390                 }
10391
10392                 vcmd_idx = i;
10393                 break;
10394         }
10395
10396         if (vcmd_idx < 0) {
10397                 err = -EOPNOTSUPP;
10398                 goto out_unlock;
10399         }
10400
10401         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10402                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10403                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10404         }
10405
10406         /* 0 is the first index - add 1 to parse only once */
10407         cb->args[0] = (*rdev)->wiphy_idx + 1;
10408         /* add 1 to know if it was NULL */
10409         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10410         cb->args[2] = vcmd_idx;
10411         cb->args[3] = (unsigned long)data;
10412         cb->args[4] = data_len;
10413
10414         /* keep rtnl locked in successful case */
10415         return 0;
10416  out_unlock:
10417         rtnl_unlock();
10418         return err;
10419 }
10420
10421 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10422                                    struct netlink_callback *cb)
10423 {
10424         struct cfg80211_registered_device *rdev;
10425         struct wireless_dev *wdev;
10426         unsigned int vcmd_idx;
10427         const struct wiphy_vendor_command *vcmd;
10428         void *data;
10429         int data_len;
10430         int err;
10431         struct nlattr *vendor_data;
10432
10433         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10434         if (err)
10435                 return err;
10436
10437         vcmd_idx = cb->args[2];
10438         data = (void *)cb->args[3];
10439         data_len = cb->args[4];
10440         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10441
10442         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10443                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10444                 if (!wdev)
10445                         return -EINVAL;
10446                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10447                     !wdev->netdev)
10448                         return -EINVAL;
10449
10450                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10451                         if (wdev->netdev &&
10452                             !netif_running(wdev->netdev))
10453                                 return -ENETDOWN;
10454                         if (!wdev->netdev && !wdev->p2p_started)
10455                                 return -ENETDOWN;
10456                 }
10457         }
10458
10459         while (1) {
10460                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10461                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10462                                            NL80211_CMD_VENDOR);
10463                 if (!hdr)
10464                         break;
10465
10466                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10467                     (wdev && nla_put_u64(skb, NL80211_ATTR_WDEV,
10468                                          wdev_id(wdev)))) {
10469                         genlmsg_cancel(skb, hdr);
10470                         break;
10471                 }
10472
10473                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10474                 if (!vendor_data) {
10475                         genlmsg_cancel(skb, hdr);
10476                         break;
10477                 }
10478
10479                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10480                                    (unsigned long *)&cb->args[5]);
10481                 nla_nest_end(skb, vendor_data);
10482
10483                 if (err == -ENOBUFS || err == -ENOENT) {
10484                         genlmsg_cancel(skb, hdr);
10485                         break;
10486                 } else if (err) {
10487                         genlmsg_cancel(skb, hdr);
10488                         goto out;
10489                 }
10490
10491                 genlmsg_end(skb, hdr);
10492         }
10493
10494         err = skb->len;
10495  out:
10496         rtnl_unlock();
10497         return err;
10498 }
10499
10500 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10501                                            enum nl80211_commands cmd,
10502                                            enum nl80211_attrs attr,
10503                                            int approxlen)
10504 {
10505         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10506
10507         if (WARN_ON(!rdev->cur_cmd_info))
10508                 return NULL;
10509
10510         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10511                                            rdev->cur_cmd_info->snd_portid,
10512                                            rdev->cur_cmd_info->snd_seq,
10513                                            cmd, attr, NULL, GFP_KERNEL);
10514 }
10515 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10516
10517 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10518 {
10519         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10520         void *hdr = ((void **)skb->cb)[1];
10521         struct nlattr *data = ((void **)skb->cb)[2];
10522
10523         /* clear CB data for netlink core to own from now on */
10524         memset(skb->cb, 0, sizeof(skb->cb));
10525
10526         if (WARN_ON(!rdev->cur_cmd_info)) {
10527                 kfree_skb(skb);
10528                 return -EINVAL;
10529         }
10530
10531         nla_nest_end(skb, data);
10532         genlmsg_end(skb, hdr);
10533         return genlmsg_reply(skb, rdev->cur_cmd_info);
10534 }
10535 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10536
10537
10538 static int nl80211_set_qos_map(struct sk_buff *skb,
10539                                struct genl_info *info)
10540 {
10541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10542         struct cfg80211_qos_map *qos_map = NULL;
10543         struct net_device *dev = info->user_ptr[1];
10544         u8 *pos, len, num_des, des_len, des;
10545         int ret;
10546
10547         if (!rdev->ops->set_qos_map)
10548                 return -EOPNOTSUPP;
10549
10550         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10551                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10552                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10553
10554                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10555                     len > IEEE80211_QOS_MAP_LEN_MAX)
10556                         return -EINVAL;
10557
10558                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10559                 if (!qos_map)
10560                         return -ENOMEM;
10561
10562                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10563                 if (num_des) {
10564                         des_len = num_des *
10565                                 sizeof(struct cfg80211_dscp_exception);
10566                         memcpy(qos_map->dscp_exception, pos, des_len);
10567                         qos_map->num_des = num_des;
10568                         for (des = 0; des < num_des; des++) {
10569                                 if (qos_map->dscp_exception[des].up > 7) {
10570                                         kfree(qos_map);
10571                                         return -EINVAL;
10572                                 }
10573                         }
10574                         pos += des_len;
10575                 }
10576                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10577         }
10578
10579         wdev_lock(dev->ieee80211_ptr);
10580         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10581         if (!ret)
10582                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10583         wdev_unlock(dev->ieee80211_ptr);
10584
10585         kfree(qos_map);
10586         return ret;
10587 }
10588
10589 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10590 {
10591         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10592         struct net_device *dev = info->user_ptr[1];
10593         struct wireless_dev *wdev = dev->ieee80211_ptr;
10594         const u8 *peer;
10595         u8 tsid, up;
10596         u16 admitted_time = 0;
10597         int err;
10598
10599         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10600                 return -EOPNOTSUPP;
10601
10602         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10603             !info->attrs[NL80211_ATTR_USER_PRIO])
10604                 return -EINVAL;
10605
10606         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10607         if (tsid >= IEEE80211_NUM_TIDS)
10608                 return -EINVAL;
10609
10610         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10611         if (up >= IEEE80211_NUM_UPS)
10612                 return -EINVAL;
10613
10614         /* WMM uses TIDs 0-7 even for TSPEC */
10615         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10616                 /* TODO: handle 802.11 TSPEC/admission control
10617                  * need more attributes for that (e.g. BA session requirement);
10618                  * change the WMM adminssion test above to allow both then
10619                  */
10620                 return -EINVAL;
10621         }
10622
10623         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10624
10625         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10626                 admitted_time =
10627                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10628                 if (!admitted_time)
10629                         return -EINVAL;
10630         }
10631
10632         wdev_lock(wdev);
10633         switch (wdev->iftype) {
10634         case NL80211_IFTYPE_STATION:
10635         case NL80211_IFTYPE_P2P_CLIENT:
10636                 if (wdev->current_bss)
10637                         break;
10638                 err = -ENOTCONN;
10639                 goto out;
10640         default:
10641                 err = -EOPNOTSUPP;
10642                 goto out;
10643         }
10644
10645         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10646
10647  out:
10648         wdev_unlock(wdev);
10649         return err;
10650 }
10651
10652 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10653 {
10654         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10655         struct net_device *dev = info->user_ptr[1];
10656         struct wireless_dev *wdev = dev->ieee80211_ptr;
10657         const u8 *peer;
10658         u8 tsid;
10659         int err;
10660
10661         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10662                 return -EINVAL;
10663
10664         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10665         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10666
10667         wdev_lock(wdev);
10668         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10669         wdev_unlock(wdev);
10670
10671         return err;
10672 }
10673
10674 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10675                                        struct genl_info *info)
10676 {
10677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10678         struct net_device *dev = info->user_ptr[1];
10679         struct wireless_dev *wdev = dev->ieee80211_ptr;
10680         struct cfg80211_chan_def chandef = {};
10681         const u8 *addr;
10682         u8 oper_class;
10683         int err;
10684
10685         if (!rdev->ops->tdls_channel_switch ||
10686             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10687                 return -EOPNOTSUPP;
10688
10689         switch (dev->ieee80211_ptr->iftype) {
10690         case NL80211_IFTYPE_STATION:
10691         case NL80211_IFTYPE_P2P_CLIENT:
10692                 break;
10693         default:
10694                 return -EOPNOTSUPP;
10695         }
10696
10697         if (!info->attrs[NL80211_ATTR_MAC] ||
10698             !info->attrs[NL80211_ATTR_OPER_CLASS])
10699                 return -EINVAL;
10700
10701         err = nl80211_parse_chandef(rdev, info, &chandef);
10702         if (err)
10703                 return err;
10704
10705         /*
10706          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10707          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10708          * specification is not defined for them.
10709          */
10710         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10711             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10712             chandef.width != NL80211_CHAN_WIDTH_20)
10713                 return -EINVAL;
10714
10715         /* we will be active on the TDLS link */
10716         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10717                                            wdev->iftype))
10718                 return -EINVAL;
10719
10720         /* don't allow switching to DFS channels */
10721         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10722                 return -EINVAL;
10723
10724         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10725         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10726
10727         wdev_lock(wdev);
10728         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10729         wdev_unlock(wdev);
10730
10731         return err;
10732 }
10733
10734 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10735                                               struct genl_info *info)
10736 {
10737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10738         struct net_device *dev = info->user_ptr[1];
10739         struct wireless_dev *wdev = dev->ieee80211_ptr;
10740         const u8 *addr;
10741
10742         if (!rdev->ops->tdls_channel_switch ||
10743             !rdev->ops->tdls_cancel_channel_switch ||
10744             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10745                 return -EOPNOTSUPP;
10746
10747         switch (dev->ieee80211_ptr->iftype) {
10748         case NL80211_IFTYPE_STATION:
10749         case NL80211_IFTYPE_P2P_CLIENT:
10750                 break;
10751         default:
10752                 return -EOPNOTSUPP;
10753         }
10754
10755         if (!info->attrs[NL80211_ATTR_MAC])
10756                 return -EINVAL;
10757
10758         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10759
10760         wdev_lock(wdev);
10761         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10762         wdev_unlock(wdev);
10763
10764         return 0;
10765 }
10766
10767 #define NL80211_FLAG_NEED_WIPHY         0x01
10768 #define NL80211_FLAG_NEED_NETDEV        0x02
10769 #define NL80211_FLAG_NEED_RTNL          0x04
10770 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10771 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10772                                          NL80211_FLAG_CHECK_NETDEV_UP)
10773 #define NL80211_FLAG_NEED_WDEV          0x10
10774 /* If a netdev is associated, it must be UP, P2P must be started */
10775 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10776                                          NL80211_FLAG_CHECK_NETDEV_UP)
10777 #define NL80211_FLAG_CLEAR_SKB          0x20
10778
10779 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10780                             struct genl_info *info)
10781 {
10782         struct cfg80211_registered_device *rdev;
10783         struct wireless_dev *wdev;
10784         struct net_device *dev;
10785         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10786
10787         if (rtnl)
10788                 rtnl_lock();
10789
10790         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10791                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10792                 if (IS_ERR(rdev)) {
10793                         if (rtnl)
10794                                 rtnl_unlock();
10795                         return PTR_ERR(rdev);
10796                 }
10797                 info->user_ptr[0] = rdev;
10798         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10799                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10800                 ASSERT_RTNL();
10801
10802                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10803                                                   info->attrs);
10804                 if (IS_ERR(wdev)) {
10805                         if (rtnl)
10806                                 rtnl_unlock();
10807                         return PTR_ERR(wdev);
10808                 }
10809
10810                 dev = wdev->netdev;
10811                 rdev = wiphy_to_rdev(wdev->wiphy);
10812
10813                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10814                         if (!dev) {
10815                                 if (rtnl)
10816                                         rtnl_unlock();
10817                                 return -EINVAL;
10818                         }
10819
10820                         info->user_ptr[1] = dev;
10821                 } else {
10822                         info->user_ptr[1] = wdev;
10823                 }
10824
10825                 if (dev) {
10826                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10827                             !netif_running(dev)) {
10828                                 if (rtnl)
10829                                         rtnl_unlock();
10830                                 return -ENETDOWN;
10831                         }
10832
10833                         dev_hold(dev);
10834                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10835                         if (!wdev->p2p_started) {
10836                                 if (rtnl)
10837                                         rtnl_unlock();
10838                                 return -ENETDOWN;
10839                         }
10840                 }
10841
10842                 info->user_ptr[0] = rdev;
10843         }
10844
10845         return 0;
10846 }
10847
10848 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10849                               struct genl_info *info)
10850 {
10851         if (info->user_ptr[1]) {
10852                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10853                         struct wireless_dev *wdev = info->user_ptr[1];
10854
10855                         if (wdev->netdev)
10856                                 dev_put(wdev->netdev);
10857                 } else {
10858                         dev_put(info->user_ptr[1]);
10859                 }
10860         }
10861
10862         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10863                 rtnl_unlock();
10864
10865         /* If needed, clear the netlink message payload from the SKB
10866          * as it might contain key data that shouldn't stick around on
10867          * the heap after the SKB is freed. The netlink message header
10868          * is still needed for further processing, so leave it intact.
10869          */
10870         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10871                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10872
10873                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10874         }
10875 }
10876
10877 static const struct genl_ops nl80211_ops[] = {
10878         {
10879                 .cmd = NL80211_CMD_GET_WIPHY,
10880                 .doit = nl80211_get_wiphy,
10881                 .dumpit = nl80211_dump_wiphy,
10882                 .done = nl80211_dump_wiphy_done,
10883                 .policy = nl80211_policy,
10884                 /* can be retrieved by unprivileged users */
10885                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10886                                   NL80211_FLAG_NEED_RTNL,
10887         },
10888         {
10889                 .cmd = NL80211_CMD_SET_WIPHY,
10890                 .doit = nl80211_set_wiphy,
10891                 .policy = nl80211_policy,
10892                 .flags = GENL_ADMIN_PERM,
10893                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10894         },
10895         {
10896                 .cmd = NL80211_CMD_GET_INTERFACE,
10897                 .doit = nl80211_get_interface,
10898                 .dumpit = nl80211_dump_interface,
10899                 .policy = nl80211_policy,
10900                 /* can be retrieved by unprivileged users */
10901                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10902                                   NL80211_FLAG_NEED_RTNL,
10903         },
10904         {
10905                 .cmd = NL80211_CMD_SET_INTERFACE,
10906                 .doit = nl80211_set_interface,
10907                 .policy = nl80211_policy,
10908                 .flags = GENL_ADMIN_PERM,
10909                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10910                                   NL80211_FLAG_NEED_RTNL,
10911         },
10912         {
10913                 .cmd = NL80211_CMD_NEW_INTERFACE,
10914                 .doit = nl80211_new_interface,
10915                 .policy = nl80211_policy,
10916                 .flags = GENL_ADMIN_PERM,
10917                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10918                                   NL80211_FLAG_NEED_RTNL,
10919         },
10920         {
10921                 .cmd = NL80211_CMD_DEL_INTERFACE,
10922                 .doit = nl80211_del_interface,
10923                 .policy = nl80211_policy,
10924                 .flags = GENL_ADMIN_PERM,
10925                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10926                                   NL80211_FLAG_NEED_RTNL,
10927         },
10928         {
10929                 .cmd = NL80211_CMD_GET_KEY,
10930                 .doit = nl80211_get_key,
10931                 .policy = nl80211_policy,
10932                 .flags = GENL_ADMIN_PERM,
10933                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10934                                   NL80211_FLAG_NEED_RTNL,
10935         },
10936         {
10937                 .cmd = NL80211_CMD_SET_KEY,
10938                 .doit = nl80211_set_key,
10939                 .policy = nl80211_policy,
10940                 .flags = GENL_ADMIN_PERM,
10941                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10942                                   NL80211_FLAG_NEED_RTNL |
10943                                   NL80211_FLAG_CLEAR_SKB,
10944         },
10945         {
10946                 .cmd = NL80211_CMD_NEW_KEY,
10947                 .doit = nl80211_new_key,
10948                 .policy = nl80211_policy,
10949                 .flags = GENL_ADMIN_PERM,
10950                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10951                                   NL80211_FLAG_NEED_RTNL |
10952                                   NL80211_FLAG_CLEAR_SKB,
10953         },
10954         {
10955                 .cmd = NL80211_CMD_DEL_KEY,
10956                 .doit = nl80211_del_key,
10957                 .policy = nl80211_policy,
10958                 .flags = GENL_ADMIN_PERM,
10959                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10960                                   NL80211_FLAG_NEED_RTNL,
10961         },
10962         {
10963                 .cmd = NL80211_CMD_SET_BEACON,
10964                 .policy = nl80211_policy,
10965                 .flags = GENL_ADMIN_PERM,
10966                 .doit = nl80211_set_beacon,
10967                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10968                                   NL80211_FLAG_NEED_RTNL,
10969         },
10970         {
10971                 .cmd = NL80211_CMD_START_AP,
10972                 .policy = nl80211_policy,
10973                 .flags = GENL_ADMIN_PERM,
10974                 .doit = nl80211_start_ap,
10975                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10976                                   NL80211_FLAG_NEED_RTNL,
10977         },
10978         {
10979                 .cmd = NL80211_CMD_STOP_AP,
10980                 .policy = nl80211_policy,
10981                 .flags = GENL_ADMIN_PERM,
10982                 .doit = nl80211_stop_ap,
10983                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10984                                   NL80211_FLAG_NEED_RTNL,
10985         },
10986         {
10987                 .cmd = NL80211_CMD_GET_STATION,
10988                 .doit = nl80211_get_station,
10989                 .dumpit = nl80211_dump_station,
10990                 .policy = nl80211_policy,
10991                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10992                                   NL80211_FLAG_NEED_RTNL,
10993         },
10994         {
10995                 .cmd = NL80211_CMD_SET_STATION,
10996                 .doit = nl80211_set_station,
10997                 .policy = nl80211_policy,
10998                 .flags = GENL_ADMIN_PERM,
10999                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11000                                   NL80211_FLAG_NEED_RTNL,
11001         },
11002         {
11003                 .cmd = NL80211_CMD_NEW_STATION,
11004                 .doit = nl80211_new_station,
11005                 .policy = nl80211_policy,
11006                 .flags = GENL_ADMIN_PERM,
11007                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11008                                   NL80211_FLAG_NEED_RTNL,
11009         },
11010         {
11011                 .cmd = NL80211_CMD_DEL_STATION,
11012                 .doit = nl80211_del_station,
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_GET_MPATH,
11020                 .doit = nl80211_get_mpath,
11021                 .dumpit = nl80211_dump_mpath,
11022                 .policy = nl80211_policy,
11023                 .flags = GENL_ADMIN_PERM,
11024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11025                                   NL80211_FLAG_NEED_RTNL,
11026         },
11027         {
11028                 .cmd = NL80211_CMD_GET_MPP,
11029                 .doit = nl80211_get_mpp,
11030                 .dumpit = nl80211_dump_mpp,
11031                 .policy = nl80211_policy,
11032                 .flags = GENL_ADMIN_PERM,
11033                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11034                                   NL80211_FLAG_NEED_RTNL,
11035         },
11036         {
11037                 .cmd = NL80211_CMD_SET_MPATH,
11038                 .doit = nl80211_set_mpath,
11039                 .policy = nl80211_policy,
11040                 .flags = GENL_ADMIN_PERM,
11041                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11042                                   NL80211_FLAG_NEED_RTNL,
11043         },
11044         {
11045                 .cmd = NL80211_CMD_NEW_MPATH,
11046                 .doit = nl80211_new_mpath,
11047                 .policy = nl80211_policy,
11048                 .flags = GENL_ADMIN_PERM,
11049                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11050                                   NL80211_FLAG_NEED_RTNL,
11051         },
11052         {
11053                 .cmd = NL80211_CMD_DEL_MPATH,
11054                 .doit = nl80211_del_mpath,
11055                 .policy = nl80211_policy,
11056                 .flags = GENL_ADMIN_PERM,
11057                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11058                                   NL80211_FLAG_NEED_RTNL,
11059         },
11060         {
11061                 .cmd = NL80211_CMD_SET_BSS,
11062                 .doit = nl80211_set_bss,
11063                 .policy = nl80211_policy,
11064                 .flags = GENL_ADMIN_PERM,
11065                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11066                                   NL80211_FLAG_NEED_RTNL,
11067         },
11068         {
11069                 .cmd = NL80211_CMD_GET_REG,
11070                 .doit = nl80211_get_reg_do,
11071                 .dumpit = nl80211_get_reg_dump,
11072                 .policy = nl80211_policy,
11073                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11074                 /* can be retrieved by unprivileged users */
11075         },
11076 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11077         {
11078                 .cmd = NL80211_CMD_SET_REG,
11079                 .doit = nl80211_set_reg,
11080                 .policy = nl80211_policy,
11081                 .flags = GENL_ADMIN_PERM,
11082                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11083         },
11084 #endif
11085         {
11086                 .cmd = NL80211_CMD_REQ_SET_REG,
11087                 .doit = nl80211_req_set_reg,
11088                 .policy = nl80211_policy,
11089                 .flags = GENL_ADMIN_PERM,
11090         },
11091         {
11092                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11093                 .doit = nl80211_get_mesh_config,
11094                 .policy = nl80211_policy,
11095                 /* can be retrieved by unprivileged users */
11096                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11097                                   NL80211_FLAG_NEED_RTNL,
11098         },
11099         {
11100                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11101                 .doit = nl80211_update_mesh_config,
11102                 .policy = nl80211_policy,
11103                 .flags = GENL_ADMIN_PERM,
11104                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11105                                   NL80211_FLAG_NEED_RTNL,
11106         },
11107         {
11108                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11109                 .doit = nl80211_trigger_scan,
11110                 .policy = nl80211_policy,
11111                 .flags = GENL_ADMIN_PERM,
11112                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11113                                   NL80211_FLAG_NEED_RTNL,
11114         },
11115         {
11116                 .cmd = NL80211_CMD_ABORT_SCAN,
11117                 .doit = nl80211_abort_scan,
11118                 .policy = nl80211_policy,
11119                 .flags = GENL_ADMIN_PERM,
11120                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11121                                   NL80211_FLAG_NEED_RTNL,
11122         },
11123         {
11124                 .cmd = NL80211_CMD_GET_SCAN,
11125                 .policy = nl80211_policy,
11126                 .dumpit = nl80211_dump_scan,
11127         },
11128         {
11129                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11130                 .doit = nl80211_start_sched_scan,
11131                 .policy = nl80211_policy,
11132                 .flags = GENL_ADMIN_PERM,
11133                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11134                                   NL80211_FLAG_NEED_RTNL,
11135         },
11136         {
11137                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11138                 .doit = nl80211_stop_sched_scan,
11139                 .policy = nl80211_policy,
11140                 .flags = GENL_ADMIN_PERM,
11141                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11142                                   NL80211_FLAG_NEED_RTNL,
11143         },
11144         {
11145                 .cmd = NL80211_CMD_AUTHENTICATE,
11146                 .doit = nl80211_authenticate,
11147                 .policy = nl80211_policy,
11148                 .flags = GENL_ADMIN_PERM,
11149                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11150                                   NL80211_FLAG_NEED_RTNL |
11151                                   NL80211_FLAG_CLEAR_SKB,
11152         },
11153         {
11154                 .cmd = NL80211_CMD_ASSOCIATE,
11155                 .doit = nl80211_associate,
11156                 .policy = nl80211_policy,
11157                 .flags = GENL_ADMIN_PERM,
11158                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11159                                   NL80211_FLAG_NEED_RTNL,
11160         },
11161         {
11162                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11163                 .doit = nl80211_deauthenticate,
11164                 .policy = nl80211_policy,
11165                 .flags = GENL_ADMIN_PERM,
11166                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11167                                   NL80211_FLAG_NEED_RTNL,
11168         },
11169         {
11170                 .cmd = NL80211_CMD_DISASSOCIATE,
11171                 .doit = nl80211_disassociate,
11172                 .policy = nl80211_policy,
11173                 .flags = GENL_ADMIN_PERM,
11174                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11175                                   NL80211_FLAG_NEED_RTNL,
11176         },
11177         {
11178                 .cmd = NL80211_CMD_JOIN_IBSS,
11179                 .doit = nl80211_join_ibss,
11180                 .policy = nl80211_policy,
11181                 .flags = GENL_ADMIN_PERM,
11182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11183                                   NL80211_FLAG_NEED_RTNL,
11184         },
11185         {
11186                 .cmd = NL80211_CMD_LEAVE_IBSS,
11187                 .doit = nl80211_leave_ibss,
11188                 .policy = nl80211_policy,
11189                 .flags = GENL_ADMIN_PERM,
11190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11191                                   NL80211_FLAG_NEED_RTNL,
11192         },
11193 #ifdef CONFIG_NL80211_TESTMODE
11194         {
11195                 .cmd = NL80211_CMD_TESTMODE,
11196                 .doit = nl80211_testmode_do,
11197                 .dumpit = nl80211_testmode_dump,
11198                 .policy = nl80211_policy,
11199                 .flags = GENL_ADMIN_PERM,
11200                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11201                                   NL80211_FLAG_NEED_RTNL,
11202         },
11203 #endif
11204         {
11205                 .cmd = NL80211_CMD_CONNECT,
11206                 .doit = nl80211_connect,
11207                 .policy = nl80211_policy,
11208                 .flags = GENL_ADMIN_PERM,
11209                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11210                                   NL80211_FLAG_NEED_RTNL,
11211         },
11212         {
11213                 .cmd = NL80211_CMD_DISCONNECT,
11214                 .doit = nl80211_disconnect,
11215                 .policy = nl80211_policy,
11216                 .flags = GENL_ADMIN_PERM,
11217                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11218                                   NL80211_FLAG_NEED_RTNL,
11219         },
11220         {
11221                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11222                 .doit = nl80211_wiphy_netns,
11223                 .policy = nl80211_policy,
11224                 .flags = GENL_ADMIN_PERM,
11225                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11226                                   NL80211_FLAG_NEED_RTNL,
11227         },
11228         {
11229                 .cmd = NL80211_CMD_GET_SURVEY,
11230                 .policy = nl80211_policy,
11231                 .dumpit = nl80211_dump_survey,
11232         },
11233         {
11234                 .cmd = NL80211_CMD_SET_PMKSA,
11235                 .doit = nl80211_setdel_pmksa,
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_DEL_PMKSA,
11243                 .doit = nl80211_setdel_pmksa,
11244                 .policy = nl80211_policy,
11245                 .flags = GENL_ADMIN_PERM,
11246                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11247                                   NL80211_FLAG_NEED_RTNL,
11248         },
11249         {
11250                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11251                 .doit = nl80211_flush_pmksa,
11252                 .policy = nl80211_policy,
11253                 .flags = GENL_ADMIN_PERM,
11254                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11255                                   NL80211_FLAG_NEED_RTNL,
11256         },
11257         {
11258                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11259                 .doit = nl80211_remain_on_channel,
11260                 .policy = nl80211_policy,
11261                 .flags = GENL_ADMIN_PERM,
11262                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11263                                   NL80211_FLAG_NEED_RTNL,
11264         },
11265         {
11266                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11267                 .doit = nl80211_cancel_remain_on_channel,
11268                 .policy = nl80211_policy,
11269                 .flags = GENL_ADMIN_PERM,
11270                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11271                                   NL80211_FLAG_NEED_RTNL,
11272         },
11273         {
11274                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11275                 .doit = nl80211_set_tx_bitrate_mask,
11276                 .policy = nl80211_policy,
11277                 .flags = GENL_ADMIN_PERM,
11278                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11279                                   NL80211_FLAG_NEED_RTNL,
11280         },
11281         {
11282                 .cmd = NL80211_CMD_REGISTER_FRAME,
11283                 .doit = nl80211_register_mgmt,
11284                 .policy = nl80211_policy,
11285                 .flags = GENL_ADMIN_PERM,
11286                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11287                                   NL80211_FLAG_NEED_RTNL,
11288         },
11289         {
11290                 .cmd = NL80211_CMD_FRAME,
11291                 .doit = nl80211_tx_mgmt,
11292                 .policy = nl80211_policy,
11293                 .flags = GENL_ADMIN_PERM,
11294                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11295                                   NL80211_FLAG_NEED_RTNL,
11296         },
11297         {
11298                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11299                 .doit = nl80211_tx_mgmt_cancel_wait,
11300                 .policy = nl80211_policy,
11301                 .flags = GENL_ADMIN_PERM,
11302                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11303                                   NL80211_FLAG_NEED_RTNL,
11304         },
11305         {
11306                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11307                 .doit = nl80211_set_power_save,
11308                 .policy = nl80211_policy,
11309                 .flags = GENL_ADMIN_PERM,
11310                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11311                                   NL80211_FLAG_NEED_RTNL,
11312         },
11313         {
11314                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11315                 .doit = nl80211_get_power_save,
11316                 .policy = nl80211_policy,
11317                 /* can be retrieved by unprivileged users */
11318                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11319                                   NL80211_FLAG_NEED_RTNL,
11320         },
11321         {
11322                 .cmd = NL80211_CMD_SET_CQM,
11323                 .doit = nl80211_set_cqm,
11324                 .policy = nl80211_policy,
11325                 .flags = GENL_ADMIN_PERM,
11326                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11327                                   NL80211_FLAG_NEED_RTNL,
11328         },
11329         {
11330                 .cmd = NL80211_CMD_SET_CHANNEL,
11331                 .doit = nl80211_set_channel,
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_SET_WDS_PEER,
11339                 .doit = nl80211_set_wds_peer,
11340                 .policy = nl80211_policy,
11341                 .flags = GENL_ADMIN_PERM,
11342                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11343                                   NL80211_FLAG_NEED_RTNL,
11344         },
11345         {
11346                 .cmd = NL80211_CMD_JOIN_MESH,
11347                 .doit = nl80211_join_mesh,
11348                 .policy = nl80211_policy,
11349                 .flags = GENL_ADMIN_PERM,
11350                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11351                                   NL80211_FLAG_NEED_RTNL,
11352         },
11353         {
11354                 .cmd = NL80211_CMD_LEAVE_MESH,
11355                 .doit = nl80211_leave_mesh,
11356                 .policy = nl80211_policy,
11357                 .flags = GENL_ADMIN_PERM,
11358                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11359                                   NL80211_FLAG_NEED_RTNL,
11360         },
11361         {
11362                 .cmd = NL80211_CMD_JOIN_OCB,
11363                 .doit = nl80211_join_ocb,
11364                 .policy = nl80211_policy,
11365                 .flags = GENL_ADMIN_PERM,
11366                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11367                                   NL80211_FLAG_NEED_RTNL,
11368         },
11369         {
11370                 .cmd = NL80211_CMD_LEAVE_OCB,
11371                 .doit = nl80211_leave_ocb,
11372                 .policy = nl80211_policy,
11373                 .flags = GENL_ADMIN_PERM,
11374                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11375                                   NL80211_FLAG_NEED_RTNL,
11376         },
11377 #ifdef CONFIG_PM
11378         {
11379                 .cmd = NL80211_CMD_GET_WOWLAN,
11380                 .doit = nl80211_get_wowlan,
11381                 .policy = nl80211_policy,
11382                 /* can be retrieved by unprivileged users */
11383                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11384                                   NL80211_FLAG_NEED_RTNL,
11385         },
11386         {
11387                 .cmd = NL80211_CMD_SET_WOWLAN,
11388                 .doit = nl80211_set_wowlan,
11389                 .policy = nl80211_policy,
11390                 .flags = GENL_ADMIN_PERM,
11391                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11392                                   NL80211_FLAG_NEED_RTNL,
11393         },
11394 #endif
11395         {
11396                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11397                 .doit = nl80211_set_rekey_data,
11398                 .policy = nl80211_policy,
11399                 .flags = GENL_ADMIN_PERM,
11400                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11401                                   NL80211_FLAG_NEED_RTNL |
11402                                   NL80211_FLAG_CLEAR_SKB,
11403         },
11404         {
11405                 .cmd = NL80211_CMD_TDLS_MGMT,
11406                 .doit = nl80211_tdls_mgmt,
11407                 .policy = nl80211_policy,
11408                 .flags = GENL_ADMIN_PERM,
11409                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11410                                   NL80211_FLAG_NEED_RTNL,
11411         },
11412         {
11413                 .cmd = NL80211_CMD_TDLS_OPER,
11414                 .doit = nl80211_tdls_oper,
11415                 .policy = nl80211_policy,
11416                 .flags = GENL_ADMIN_PERM,
11417                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11418                                   NL80211_FLAG_NEED_RTNL,
11419         },
11420         {
11421                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11422                 .doit = nl80211_register_unexpected_frame,
11423                 .policy = nl80211_policy,
11424                 .flags = GENL_ADMIN_PERM,
11425                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11426                                   NL80211_FLAG_NEED_RTNL,
11427         },
11428         {
11429                 .cmd = NL80211_CMD_PROBE_CLIENT,
11430                 .doit = nl80211_probe_client,
11431                 .policy = nl80211_policy,
11432                 .flags = GENL_ADMIN_PERM,
11433                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11434                                   NL80211_FLAG_NEED_RTNL,
11435         },
11436         {
11437                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11438                 .doit = nl80211_register_beacons,
11439                 .policy = nl80211_policy,
11440                 .flags = GENL_ADMIN_PERM,
11441                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11442                                   NL80211_FLAG_NEED_RTNL,
11443         },
11444         {
11445                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11446                 .doit = nl80211_set_noack_map,
11447                 .policy = nl80211_policy,
11448                 .flags = GENL_ADMIN_PERM,
11449                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11450                                   NL80211_FLAG_NEED_RTNL,
11451         },
11452         {
11453                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11454                 .doit = nl80211_start_p2p_device,
11455                 .policy = nl80211_policy,
11456                 .flags = GENL_ADMIN_PERM,
11457                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11458                                   NL80211_FLAG_NEED_RTNL,
11459         },
11460         {
11461                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11462                 .doit = nl80211_stop_p2p_device,
11463                 .policy = nl80211_policy,
11464                 .flags = GENL_ADMIN_PERM,
11465                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11466                                   NL80211_FLAG_NEED_RTNL,
11467         },
11468         {
11469                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11470                 .doit = nl80211_set_mcast_rate,
11471                 .policy = nl80211_policy,
11472                 .flags = GENL_ADMIN_PERM,
11473                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11474                                   NL80211_FLAG_NEED_RTNL,
11475         },
11476         {
11477                 .cmd = NL80211_CMD_SET_MAC_ACL,
11478                 .doit = nl80211_set_mac_acl,
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_RADAR_DETECT,
11486                 .doit = nl80211_start_radar_detection,
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_GET_PROTOCOL_FEATURES,
11494                 .doit = nl80211_get_protocol_features,
11495                 .policy = nl80211_policy,
11496         },
11497         {
11498                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11499                 .doit = nl80211_update_ft_ies,
11500                 .policy = nl80211_policy,
11501                 .flags = GENL_ADMIN_PERM,
11502                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11503                                   NL80211_FLAG_NEED_RTNL,
11504         },
11505         {
11506                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11507                 .doit = nl80211_crit_protocol_start,
11508                 .policy = nl80211_policy,
11509                 .flags = GENL_ADMIN_PERM,
11510                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11511                                   NL80211_FLAG_NEED_RTNL,
11512         },
11513         {
11514                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11515                 .doit = nl80211_crit_protocol_stop,
11516                 .policy = nl80211_policy,
11517                 .flags = GENL_ADMIN_PERM,
11518                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11519                                   NL80211_FLAG_NEED_RTNL,
11520         },
11521         {
11522                 .cmd = NL80211_CMD_GET_COALESCE,
11523                 .doit = nl80211_get_coalesce,
11524                 .policy = nl80211_policy,
11525                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11526                                   NL80211_FLAG_NEED_RTNL,
11527         },
11528         {
11529                 .cmd = NL80211_CMD_SET_COALESCE,
11530                 .doit = nl80211_set_coalesce,
11531                 .policy = nl80211_policy,
11532                 .flags = GENL_ADMIN_PERM,
11533                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11534                                   NL80211_FLAG_NEED_RTNL,
11535         },
11536         {
11537                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11538                 .doit = nl80211_channel_switch,
11539                 .policy = nl80211_policy,
11540                 .flags = GENL_ADMIN_PERM,
11541                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11542                                   NL80211_FLAG_NEED_RTNL,
11543         },
11544         {
11545                 .cmd = NL80211_CMD_VENDOR,
11546                 .doit = nl80211_vendor_cmd,
11547                 .dumpit = nl80211_vendor_cmd_dump,
11548                 .policy = nl80211_policy,
11549                 .flags = GENL_ADMIN_PERM,
11550                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11551                                   NL80211_FLAG_NEED_RTNL,
11552         },
11553         {
11554                 .cmd = NL80211_CMD_SET_QOS_MAP,
11555                 .doit = nl80211_set_qos_map,
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_ADD_TX_TS,
11563                 .doit = nl80211_add_tx_ts,
11564                 .policy = nl80211_policy,
11565                 .flags = GENL_ADMIN_PERM,
11566                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11567                                   NL80211_FLAG_NEED_RTNL,
11568         },
11569         {
11570                 .cmd = NL80211_CMD_DEL_TX_TS,
11571                 .doit = nl80211_del_tx_ts,
11572                 .policy = nl80211_policy,
11573                 .flags = GENL_ADMIN_PERM,
11574                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11575                                   NL80211_FLAG_NEED_RTNL,
11576         },
11577         {
11578                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11579                 .doit = nl80211_tdls_channel_switch,
11580                 .policy = nl80211_policy,
11581                 .flags = GENL_ADMIN_PERM,
11582                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11583                                   NL80211_FLAG_NEED_RTNL,
11584         },
11585         {
11586                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11587                 .doit = nl80211_tdls_cancel_channel_switch,
11588                 .policy = nl80211_policy,
11589                 .flags = GENL_ADMIN_PERM,
11590                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11591                                   NL80211_FLAG_NEED_RTNL,
11592         },
11593 };
11594
11595 /* notification functions */
11596
11597 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11598                           enum nl80211_commands cmd)
11599 {
11600         struct sk_buff *msg;
11601         struct nl80211_dump_wiphy_state state = {};
11602
11603         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11604                 cmd != NL80211_CMD_DEL_WIPHY);
11605
11606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11607         if (!msg)
11608                 return;
11609
11610         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11611                 nlmsg_free(msg);
11612                 return;
11613         }
11614
11615         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11616                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11617 }
11618
11619 static int nl80211_add_scan_req(struct sk_buff *msg,
11620                                 struct cfg80211_registered_device *rdev)
11621 {
11622         struct cfg80211_scan_request *req = rdev->scan_req;
11623         struct nlattr *nest;
11624         int i;
11625
11626         if (WARN_ON(!req))
11627                 return 0;
11628
11629         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11630         if (!nest)
11631                 goto nla_put_failure;
11632         for (i = 0; i < req->n_ssids; i++) {
11633                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11634                         goto nla_put_failure;
11635         }
11636         nla_nest_end(msg, nest);
11637
11638         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11639         if (!nest)
11640                 goto nla_put_failure;
11641         for (i = 0; i < req->n_channels; i++) {
11642                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11643                         goto nla_put_failure;
11644         }
11645         nla_nest_end(msg, nest);
11646
11647         if (req->ie &&
11648             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11649                 goto nla_put_failure;
11650
11651         if (req->flags &&
11652             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11653                 goto nla_put_failure;
11654
11655         return 0;
11656  nla_put_failure:
11657         return -ENOBUFS;
11658 }
11659
11660 static int nl80211_send_scan_msg(struct sk_buff *msg,
11661                                  struct cfg80211_registered_device *rdev,
11662                                  struct wireless_dev *wdev,
11663                                  u32 portid, u32 seq, int flags,
11664                                  u32 cmd)
11665 {
11666         void *hdr;
11667
11668         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11669         if (!hdr)
11670                 return -1;
11671
11672         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11673             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11674                                          wdev->netdev->ifindex)) ||
11675             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11676                 goto nla_put_failure;
11677
11678         /* ignore errors and send incomplete event anyway */
11679         nl80211_add_scan_req(msg, rdev);
11680
11681         genlmsg_end(msg, hdr);
11682         return 0;
11683
11684  nla_put_failure:
11685         genlmsg_cancel(msg, hdr);
11686         return -EMSGSIZE;
11687 }
11688
11689 static int
11690 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11691                             struct cfg80211_registered_device *rdev,
11692                             struct net_device *netdev,
11693                             u32 portid, u32 seq, int flags, u32 cmd)
11694 {
11695         void *hdr;
11696
11697         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11698         if (!hdr)
11699                 return -1;
11700
11701         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11702             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11703                 goto nla_put_failure;
11704
11705         genlmsg_end(msg, hdr);
11706         return 0;
11707
11708  nla_put_failure:
11709         genlmsg_cancel(msg, hdr);
11710         return -EMSGSIZE;
11711 }
11712
11713 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11714                              struct wireless_dev *wdev)
11715 {
11716         struct sk_buff *msg;
11717
11718         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11719         if (!msg)
11720                 return;
11721
11722         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11723                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11724                 nlmsg_free(msg);
11725                 return;
11726         }
11727
11728         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11729                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11730 }
11731
11732 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11733                                        struct wireless_dev *wdev, bool aborted)
11734 {
11735         struct sk_buff *msg;
11736
11737         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11738         if (!msg)
11739                 return NULL;
11740
11741         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11742                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11743                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11744                 nlmsg_free(msg);
11745                 return NULL;
11746         }
11747
11748         return msg;
11749 }
11750
11751 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11752                               struct sk_buff *msg)
11753 {
11754         if (!msg)
11755                 return;
11756
11757         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11758                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11759 }
11760
11761 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11762                                      struct net_device *netdev)
11763 {
11764         struct sk_buff *msg;
11765
11766         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11767         if (!msg)
11768                 return;
11769
11770         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11771                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11772                 nlmsg_free(msg);
11773                 return;
11774         }
11775
11776         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11777                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11778 }
11779
11780 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11781                              struct net_device *netdev, u32 cmd)
11782 {
11783         struct sk_buff *msg;
11784
11785         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11786         if (!msg)
11787                 return;
11788
11789         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11790                 nlmsg_free(msg);
11791                 return;
11792         }
11793
11794         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11795                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11796 }
11797
11798 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11799                                           struct regulatory_request *request)
11800 {
11801         /* Userspace can always count this one always being set */
11802         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11803                 goto nla_put_failure;
11804
11805         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11806                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11807                                NL80211_REGDOM_TYPE_WORLD))
11808                         goto nla_put_failure;
11809         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11810                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11811                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11812                         goto nla_put_failure;
11813         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11814                    request->intersect) {
11815                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11816                                NL80211_REGDOM_TYPE_INTERSECTION))
11817                         goto nla_put_failure;
11818         } else {
11819                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11820                                NL80211_REGDOM_TYPE_COUNTRY) ||
11821                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11822                                    request->alpha2))
11823                         goto nla_put_failure;
11824         }
11825
11826         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11827                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11828
11829                 if (wiphy &&
11830                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11831                         goto nla_put_failure;
11832
11833                 if (wiphy &&
11834                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11835                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11836                         goto nla_put_failure;
11837         }
11838
11839         return true;
11840
11841 nla_put_failure:
11842         return false;
11843 }
11844
11845 /*
11846  * This can happen on global regulatory changes or device specific settings
11847  * based on custom regulatory domains.
11848  */
11849 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11850                                      struct regulatory_request *request)
11851 {
11852         struct sk_buff *msg;
11853         void *hdr;
11854
11855         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11856         if (!msg)
11857                 return;
11858
11859         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11860         if (!hdr) {
11861                 nlmsg_free(msg);
11862                 return;
11863         }
11864
11865         if (nl80211_reg_change_event_fill(msg, request) == false)
11866                 goto nla_put_failure;
11867
11868         genlmsg_end(msg, hdr);
11869
11870         rcu_read_lock();
11871         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11872                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11873         rcu_read_unlock();
11874
11875         return;
11876
11877 nla_put_failure:
11878         genlmsg_cancel(msg, hdr);
11879         nlmsg_free(msg);
11880 }
11881
11882 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11883                                     struct net_device *netdev,
11884                                     const u8 *buf, size_t len,
11885                                     enum nl80211_commands cmd, gfp_t gfp,
11886                                     int uapsd_queues)
11887 {
11888         struct sk_buff *msg;
11889         void *hdr;
11890
11891         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11892         if (!msg)
11893                 return;
11894
11895         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11896         if (!hdr) {
11897                 nlmsg_free(msg);
11898                 return;
11899         }
11900
11901         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11902             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11903             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11904                 goto nla_put_failure;
11905
11906         if (uapsd_queues >= 0) {
11907                 struct nlattr *nla_wmm =
11908                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11909                 if (!nla_wmm)
11910                         goto nla_put_failure;
11911
11912                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11913                                uapsd_queues))
11914                         goto nla_put_failure;
11915
11916                 nla_nest_end(msg, nla_wmm);
11917         }
11918
11919         genlmsg_end(msg, hdr);
11920
11921         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11922                                 NL80211_MCGRP_MLME, gfp);
11923         return;
11924
11925  nla_put_failure:
11926         genlmsg_cancel(msg, hdr);
11927         nlmsg_free(msg);
11928 }
11929
11930 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11931                           struct net_device *netdev, const u8 *buf,
11932                           size_t len, gfp_t gfp)
11933 {
11934         nl80211_send_mlme_event(rdev, netdev, buf, len,
11935                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11936 }
11937
11938 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11939                            struct net_device *netdev, const u8 *buf,
11940                            size_t len, gfp_t gfp, int uapsd_queues)
11941 {
11942         nl80211_send_mlme_event(rdev, netdev, buf, len,
11943                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11944 }
11945
11946 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11947                          struct net_device *netdev, const u8 *buf,
11948                          size_t len, gfp_t gfp)
11949 {
11950         nl80211_send_mlme_event(rdev, netdev, buf, len,
11951                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11952 }
11953
11954 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11955                            struct net_device *netdev, const u8 *buf,
11956                            size_t len, gfp_t gfp)
11957 {
11958         nl80211_send_mlme_event(rdev, netdev, buf, len,
11959                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11960 }
11961
11962 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11963                                   size_t len)
11964 {
11965         struct wireless_dev *wdev = dev->ieee80211_ptr;
11966         struct wiphy *wiphy = wdev->wiphy;
11967         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11968         const struct ieee80211_mgmt *mgmt = (void *)buf;
11969         u32 cmd;
11970
11971         if (WARN_ON(len < 2))
11972                 return;
11973
11974         if (ieee80211_is_deauth(mgmt->frame_control))
11975                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11976         else
11977                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11978
11979         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11980         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11981 }
11982 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11983
11984 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11985                                       struct net_device *netdev, int cmd,
11986                                       const u8 *addr, gfp_t gfp)
11987 {
11988         struct sk_buff *msg;
11989         void *hdr;
11990
11991         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11992         if (!msg)
11993                 return;
11994
11995         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11996         if (!hdr) {
11997                 nlmsg_free(msg);
11998                 return;
11999         }
12000
12001         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12002             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12003             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12004             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12005                 goto nla_put_failure;
12006
12007         genlmsg_end(msg, hdr);
12008
12009         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12010                                 NL80211_MCGRP_MLME, gfp);
12011         return;
12012
12013  nla_put_failure:
12014         genlmsg_cancel(msg, hdr);
12015         nlmsg_free(msg);
12016 }
12017
12018 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12019                                struct net_device *netdev, const u8 *addr,
12020                                gfp_t gfp)
12021 {
12022         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12023                                   addr, gfp);
12024 }
12025
12026 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12027                                 struct net_device *netdev, const u8 *addr,
12028                                 gfp_t gfp)
12029 {
12030         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12031                                   addr, gfp);
12032 }
12033
12034 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12035                                  struct net_device *netdev, const u8 *bssid,
12036                                  const u8 *req_ie, size_t req_ie_len,
12037                                  const u8 *resp_ie, size_t resp_ie_len,
12038                                  u16 status, gfp_t gfp)
12039 {
12040         struct sk_buff *msg;
12041         void *hdr;
12042
12043         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12044         if (!msg)
12045                 return;
12046
12047         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12048         if (!hdr) {
12049                 nlmsg_free(msg);
12050                 return;
12051         }
12052
12053         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12054             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12055             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12056             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
12057             (req_ie &&
12058              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12059             (resp_ie &&
12060              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12061                 goto nla_put_failure;
12062
12063         genlmsg_end(msg, hdr);
12064
12065         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12066                                 NL80211_MCGRP_MLME, gfp);
12067         return;
12068
12069  nla_put_failure:
12070         genlmsg_cancel(msg, hdr);
12071         nlmsg_free(msg);
12072
12073 }
12074
12075 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12076                          struct net_device *netdev, const u8 *bssid,
12077                          const u8 *req_ie, size_t req_ie_len,
12078                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12079 {
12080         struct sk_buff *msg;
12081         void *hdr;
12082
12083         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12084         if (!msg)
12085                 return;
12086
12087         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12088         if (!hdr) {
12089                 nlmsg_free(msg);
12090                 return;
12091         }
12092
12093         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12094             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12095             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12096             (req_ie &&
12097              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12098             (resp_ie &&
12099              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12100                 goto nla_put_failure;
12101
12102         genlmsg_end(msg, hdr);
12103
12104         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12105                                 NL80211_MCGRP_MLME, gfp);
12106         return;
12107
12108  nla_put_failure:
12109         genlmsg_cancel(msg, hdr);
12110         nlmsg_free(msg);
12111
12112 }
12113
12114 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12115                                struct net_device *netdev, u16 reason,
12116                                const u8 *ie, size_t ie_len, bool from_ap)
12117 {
12118         struct sk_buff *msg;
12119         void *hdr;
12120
12121         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12122         if (!msg)
12123                 return;
12124
12125         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12126         if (!hdr) {
12127                 nlmsg_free(msg);
12128                 return;
12129         }
12130
12131         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12132             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12133             (from_ap && reason &&
12134              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12135             (from_ap &&
12136              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12137             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12138                 goto nla_put_failure;
12139
12140         genlmsg_end(msg, hdr);
12141
12142         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12143                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12144         return;
12145
12146  nla_put_failure:
12147         genlmsg_cancel(msg, hdr);
12148         nlmsg_free(msg);
12149
12150 }
12151
12152 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12153                              struct net_device *netdev, const u8 *bssid,
12154                              gfp_t gfp)
12155 {
12156         struct sk_buff *msg;
12157         void *hdr;
12158
12159         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12160         if (!msg)
12161                 return;
12162
12163         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12164         if (!hdr) {
12165                 nlmsg_free(msg);
12166                 return;
12167         }
12168
12169         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12170             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12171             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12172                 goto nla_put_failure;
12173
12174         genlmsg_end(msg, hdr);
12175
12176         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12177                                 NL80211_MCGRP_MLME, gfp);
12178         return;
12179
12180  nla_put_failure:
12181         genlmsg_cancel(msg, hdr);
12182         nlmsg_free(msg);
12183 }
12184
12185 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12186                                         const u8* ie, u8 ie_len, gfp_t gfp)
12187 {
12188         struct wireless_dev *wdev = dev->ieee80211_ptr;
12189         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12190         struct sk_buff *msg;
12191         void *hdr;
12192
12193         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12194                 return;
12195
12196         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12197
12198         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12199         if (!msg)
12200                 return;
12201
12202         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12203         if (!hdr) {
12204                 nlmsg_free(msg);
12205                 return;
12206         }
12207
12208         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12209             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12210             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12211             (ie_len && ie &&
12212              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12213                 goto nla_put_failure;
12214
12215         genlmsg_end(msg, hdr);
12216
12217         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12218                                 NL80211_MCGRP_MLME, gfp);
12219         return;
12220
12221  nla_put_failure:
12222         genlmsg_cancel(msg, hdr);
12223         nlmsg_free(msg);
12224 }
12225 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12226
12227 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12228                                  struct net_device *netdev, const u8 *addr,
12229                                  enum nl80211_key_type key_type, int key_id,
12230                                  const u8 *tsc, gfp_t gfp)
12231 {
12232         struct sk_buff *msg;
12233         void *hdr;
12234
12235         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12236         if (!msg)
12237                 return;
12238
12239         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12240         if (!hdr) {
12241                 nlmsg_free(msg);
12242                 return;
12243         }
12244
12245         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12246             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12247             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12248             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12249             (key_id != -1 &&
12250              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12251             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12252                 goto nla_put_failure;
12253
12254         genlmsg_end(msg, hdr);
12255
12256         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12257                                 NL80211_MCGRP_MLME, gfp);
12258         return;
12259
12260  nla_put_failure:
12261         genlmsg_cancel(msg, hdr);
12262         nlmsg_free(msg);
12263 }
12264
12265 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12266                                     struct ieee80211_channel *channel_before,
12267                                     struct ieee80211_channel *channel_after)
12268 {
12269         struct sk_buff *msg;
12270         void *hdr;
12271         struct nlattr *nl_freq;
12272
12273         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12274         if (!msg)
12275                 return;
12276
12277         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12278         if (!hdr) {
12279                 nlmsg_free(msg);
12280                 return;
12281         }
12282
12283         /*
12284          * Since we are applying the beacon hint to a wiphy we know its
12285          * wiphy_idx is valid
12286          */
12287         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12288                 goto nla_put_failure;
12289
12290         /* Before */
12291         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12292         if (!nl_freq)
12293                 goto nla_put_failure;
12294         if (nl80211_msg_put_channel(msg, channel_before, false))
12295                 goto nla_put_failure;
12296         nla_nest_end(msg, nl_freq);
12297
12298         /* After */
12299         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12300         if (!nl_freq)
12301                 goto nla_put_failure;
12302         if (nl80211_msg_put_channel(msg, channel_after, false))
12303                 goto nla_put_failure;
12304         nla_nest_end(msg, nl_freq);
12305
12306         genlmsg_end(msg, hdr);
12307
12308         rcu_read_lock();
12309         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12310                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12311         rcu_read_unlock();
12312
12313         return;
12314
12315 nla_put_failure:
12316         genlmsg_cancel(msg, hdr);
12317         nlmsg_free(msg);
12318 }
12319
12320 static void nl80211_send_remain_on_chan_event(
12321         int cmd, struct cfg80211_registered_device *rdev,
12322         struct wireless_dev *wdev, u64 cookie,
12323         struct ieee80211_channel *chan,
12324         unsigned int duration, gfp_t gfp)
12325 {
12326         struct sk_buff *msg;
12327         void *hdr;
12328
12329         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12330         if (!msg)
12331                 return;
12332
12333         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12334         if (!hdr) {
12335                 nlmsg_free(msg);
12336                 return;
12337         }
12338
12339         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12340             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12341                                          wdev->netdev->ifindex)) ||
12342             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12343             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12344             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12345                         NL80211_CHAN_NO_HT) ||
12346             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
12347                 goto nla_put_failure;
12348
12349         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12350             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12351                 goto nla_put_failure;
12352
12353         genlmsg_end(msg, hdr);
12354
12355         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12356                                 NL80211_MCGRP_MLME, gfp);
12357         return;
12358
12359  nla_put_failure:
12360         genlmsg_cancel(msg, hdr);
12361         nlmsg_free(msg);
12362 }
12363
12364 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12365                                struct ieee80211_channel *chan,
12366                                unsigned int duration, gfp_t gfp)
12367 {
12368         struct wiphy *wiphy = wdev->wiphy;
12369         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12370
12371         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12372         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12373                                           rdev, wdev, cookie, chan,
12374                                           duration, gfp);
12375 }
12376 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12377
12378 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12379                                         struct ieee80211_channel *chan,
12380                                         gfp_t gfp)
12381 {
12382         struct wiphy *wiphy = wdev->wiphy;
12383         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12384
12385         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12386         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12387                                           rdev, wdev, cookie, chan, 0, gfp);
12388 }
12389 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12390
12391 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12392                       struct station_info *sinfo, gfp_t gfp)
12393 {
12394         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12395         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12396         struct sk_buff *msg;
12397
12398         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12399
12400         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12401         if (!msg)
12402                 return;
12403
12404         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12405                                  rdev, dev, mac_addr, sinfo) < 0) {
12406                 nlmsg_free(msg);
12407                 return;
12408         }
12409
12410         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12411                                 NL80211_MCGRP_MLME, gfp);
12412 }
12413 EXPORT_SYMBOL(cfg80211_new_sta);
12414
12415 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12416                             struct station_info *sinfo, gfp_t gfp)
12417 {
12418         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12419         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12420         struct sk_buff *msg;
12421         struct station_info empty_sinfo = {};
12422
12423         if (!sinfo)
12424                 sinfo = &empty_sinfo;
12425
12426         trace_cfg80211_del_sta(dev, mac_addr);
12427
12428         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12429         if (!msg)
12430                 return;
12431
12432         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12433                                  rdev, dev, mac_addr, sinfo) < 0) {
12434                 nlmsg_free(msg);
12435                 return;
12436         }
12437
12438         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12439                                 NL80211_MCGRP_MLME, gfp);
12440 }
12441 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12442
12443 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12444                           enum nl80211_connect_failed_reason reason,
12445                           gfp_t gfp)
12446 {
12447         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12448         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12449         struct sk_buff *msg;
12450         void *hdr;
12451
12452         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12453         if (!msg)
12454                 return;
12455
12456         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12457         if (!hdr) {
12458                 nlmsg_free(msg);
12459                 return;
12460         }
12461
12462         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12463             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12464             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12465                 goto nla_put_failure;
12466
12467         genlmsg_end(msg, hdr);
12468
12469         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12470                                 NL80211_MCGRP_MLME, gfp);
12471         return;
12472
12473  nla_put_failure:
12474         genlmsg_cancel(msg, hdr);
12475         nlmsg_free(msg);
12476 }
12477 EXPORT_SYMBOL(cfg80211_conn_failed);
12478
12479 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12480                                        const u8 *addr, gfp_t gfp)
12481 {
12482         struct wireless_dev *wdev = dev->ieee80211_ptr;
12483         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12484         struct sk_buff *msg;
12485         void *hdr;
12486         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12487
12488         if (!nlportid)
12489                 return false;
12490
12491         msg = nlmsg_new(100, gfp);
12492         if (!msg)
12493                 return true;
12494
12495         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12496         if (!hdr) {
12497                 nlmsg_free(msg);
12498                 return true;
12499         }
12500
12501         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12502             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12503             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12504                 goto nla_put_failure;
12505
12506         genlmsg_end(msg, hdr);
12507         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12508         return true;
12509
12510  nla_put_failure:
12511         genlmsg_cancel(msg, hdr);
12512         nlmsg_free(msg);
12513         return true;
12514 }
12515
12516 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12517                                 const u8 *addr, gfp_t gfp)
12518 {
12519         struct wireless_dev *wdev = dev->ieee80211_ptr;
12520         bool ret;
12521
12522         trace_cfg80211_rx_spurious_frame(dev, addr);
12523
12524         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12525                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12526                 trace_cfg80211_return_bool(false);
12527                 return false;
12528         }
12529         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12530                                          addr, gfp);
12531         trace_cfg80211_return_bool(ret);
12532         return ret;
12533 }
12534 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12535
12536 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12537                                         const u8 *addr, gfp_t gfp)
12538 {
12539         struct wireless_dev *wdev = dev->ieee80211_ptr;
12540         bool ret;
12541
12542         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12543
12544         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12545                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12546                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12547                 trace_cfg80211_return_bool(false);
12548                 return false;
12549         }
12550         ret = __nl80211_unexpected_frame(dev,
12551                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12552                                          addr, gfp);
12553         trace_cfg80211_return_bool(ret);
12554         return ret;
12555 }
12556 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12557
12558 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12559                       struct wireless_dev *wdev, u32 nlportid,
12560                       int freq, int sig_dbm,
12561                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12562 {
12563         struct net_device *netdev = wdev->netdev;
12564         struct sk_buff *msg;
12565         void *hdr;
12566
12567         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12568         if (!msg)
12569                 return -ENOMEM;
12570
12571         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12572         if (!hdr) {
12573                 nlmsg_free(msg);
12574                 return -ENOMEM;
12575         }
12576
12577         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12578             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12579                                         netdev->ifindex)) ||
12580             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12581             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12582             (sig_dbm &&
12583              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12584             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12585             (flags &&
12586              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12587                 goto nla_put_failure;
12588
12589         genlmsg_end(msg, hdr);
12590
12591         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12592
12593  nla_put_failure:
12594         genlmsg_cancel(msg, hdr);
12595         nlmsg_free(msg);
12596         return -ENOBUFS;
12597 }
12598
12599 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12600                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12601 {
12602         struct wiphy *wiphy = wdev->wiphy;
12603         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12604         struct net_device *netdev = wdev->netdev;
12605         struct sk_buff *msg;
12606         void *hdr;
12607
12608         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12609
12610         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12611         if (!msg)
12612                 return;
12613
12614         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12615         if (!hdr) {
12616                 nlmsg_free(msg);
12617                 return;
12618         }
12619
12620         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12621             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12622                                    netdev->ifindex)) ||
12623             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12624             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12625             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12626             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12627                 goto nla_put_failure;
12628
12629         genlmsg_end(msg, hdr);
12630
12631         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12632                                 NL80211_MCGRP_MLME, gfp);
12633         return;
12634
12635  nla_put_failure:
12636         genlmsg_cancel(msg, hdr);
12637         nlmsg_free(msg);
12638 }
12639 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12640
12641 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12642                                             const char *mac, gfp_t gfp)
12643 {
12644         struct wireless_dev *wdev = dev->ieee80211_ptr;
12645         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12646         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12647         void **cb;
12648
12649         if (!msg)
12650                 return NULL;
12651
12652         cb = (void **)msg->cb;
12653
12654         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12655         if (!cb[0]) {
12656                 nlmsg_free(msg);
12657                 return NULL;
12658         }
12659
12660         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12661             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12662                 goto nla_put_failure;
12663
12664         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12665                 goto nla_put_failure;
12666
12667         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12668         if (!cb[1])
12669                 goto nla_put_failure;
12670
12671         cb[2] = rdev;
12672
12673         return msg;
12674  nla_put_failure:
12675         nlmsg_free(msg);
12676         return NULL;
12677 }
12678
12679 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12680 {
12681         void **cb = (void **)msg->cb;
12682         struct cfg80211_registered_device *rdev = cb[2];
12683
12684         nla_nest_end(msg, cb[1]);
12685         genlmsg_end(msg, cb[0]);
12686
12687         memset(msg->cb, 0, sizeof(msg->cb));
12688
12689         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12690                                 NL80211_MCGRP_MLME, gfp);
12691 }
12692
12693 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12694                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12695                               gfp_t gfp)
12696 {
12697         struct sk_buff *msg;
12698
12699         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12700
12701         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12702                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12703                 return;
12704
12705         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12706         if (!msg)
12707                 return;
12708
12709         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12710                         rssi_event))
12711                 goto nla_put_failure;
12712
12713         cfg80211_send_cqm(msg, gfp);
12714
12715         return;
12716
12717  nla_put_failure:
12718         nlmsg_free(msg);
12719 }
12720 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12721
12722 void cfg80211_cqm_txe_notify(struct net_device *dev,
12723                              const u8 *peer, u32 num_packets,
12724                              u32 rate, u32 intvl, gfp_t gfp)
12725 {
12726         struct sk_buff *msg;
12727
12728         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12729         if (!msg)
12730                 return;
12731
12732         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12733                 goto nla_put_failure;
12734
12735         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12736                 goto nla_put_failure;
12737
12738         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12739                 goto nla_put_failure;
12740
12741         cfg80211_send_cqm(msg, gfp);
12742         return;
12743
12744  nla_put_failure:
12745         nlmsg_free(msg);
12746 }
12747 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12748
12749 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12750                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12751 {
12752         struct sk_buff *msg;
12753
12754         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12755
12756         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12757         if (!msg)
12758                 return;
12759
12760         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12761                 goto nla_put_failure;
12762
12763         cfg80211_send_cqm(msg, gfp);
12764         return;
12765
12766  nla_put_failure:
12767         nlmsg_free(msg);
12768 }
12769 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12770
12771 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12772 {
12773         struct sk_buff *msg;
12774
12775         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12776         if (!msg)
12777                 return;
12778
12779         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12780                 goto nla_put_failure;
12781
12782         cfg80211_send_cqm(msg, gfp);
12783         return;
12784
12785  nla_put_failure:
12786         nlmsg_free(msg);
12787 }
12788 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12789
12790 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12791                                      struct net_device *netdev, const u8 *bssid,
12792                                      const u8 *replay_ctr, gfp_t gfp)
12793 {
12794         struct sk_buff *msg;
12795         struct nlattr *rekey_attr;
12796         void *hdr;
12797
12798         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12799         if (!msg)
12800                 return;
12801
12802         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12803         if (!hdr) {
12804                 nlmsg_free(msg);
12805                 return;
12806         }
12807
12808         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12809             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12810             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12811                 goto nla_put_failure;
12812
12813         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12814         if (!rekey_attr)
12815                 goto nla_put_failure;
12816
12817         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12818                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12819                 goto nla_put_failure;
12820
12821         nla_nest_end(msg, rekey_attr);
12822
12823         genlmsg_end(msg, hdr);
12824
12825         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12826                                 NL80211_MCGRP_MLME, gfp);
12827         return;
12828
12829  nla_put_failure:
12830         genlmsg_cancel(msg, hdr);
12831         nlmsg_free(msg);
12832 }
12833
12834 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12835                                const u8 *replay_ctr, gfp_t gfp)
12836 {
12837         struct wireless_dev *wdev = dev->ieee80211_ptr;
12838         struct wiphy *wiphy = wdev->wiphy;
12839         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12840
12841         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12842         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12843 }
12844 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12845
12846 static void
12847 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12848                                struct net_device *netdev, int index,
12849                                const u8 *bssid, bool preauth, gfp_t gfp)
12850 {
12851         struct sk_buff *msg;
12852         struct nlattr *attr;
12853         void *hdr;
12854
12855         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12856         if (!msg)
12857                 return;
12858
12859         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12860         if (!hdr) {
12861                 nlmsg_free(msg);
12862                 return;
12863         }
12864
12865         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12866             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12867                 goto nla_put_failure;
12868
12869         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12870         if (!attr)
12871                 goto nla_put_failure;
12872
12873         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12874             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12875             (preauth &&
12876              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12877                 goto nla_put_failure;
12878
12879         nla_nest_end(msg, attr);
12880
12881         genlmsg_end(msg, hdr);
12882
12883         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12884                                 NL80211_MCGRP_MLME, gfp);
12885         return;
12886
12887  nla_put_failure:
12888         genlmsg_cancel(msg, hdr);
12889         nlmsg_free(msg);
12890 }
12891
12892 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12893                                      const u8 *bssid, bool preauth, gfp_t gfp)
12894 {
12895         struct wireless_dev *wdev = dev->ieee80211_ptr;
12896         struct wiphy *wiphy = wdev->wiphy;
12897         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12898
12899         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12900         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12901 }
12902 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12903
12904 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12905                                      struct net_device *netdev,
12906                                      struct cfg80211_chan_def *chandef,
12907                                      gfp_t gfp,
12908                                      enum nl80211_commands notif,
12909                                      u8 count)
12910 {
12911         struct sk_buff *msg;
12912         void *hdr;
12913
12914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12915         if (!msg)
12916                 return;
12917
12918         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12919         if (!hdr) {
12920                 nlmsg_free(msg);
12921                 return;
12922         }
12923
12924         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12925                 goto nla_put_failure;
12926
12927         if (nl80211_send_chandef(msg, chandef))
12928                 goto nla_put_failure;
12929
12930         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12931             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12932                         goto nla_put_failure;
12933
12934         genlmsg_end(msg, hdr);
12935
12936         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12937                                 NL80211_MCGRP_MLME, gfp);
12938         return;
12939
12940  nla_put_failure:
12941         genlmsg_cancel(msg, hdr);
12942         nlmsg_free(msg);
12943 }
12944
12945 void cfg80211_ch_switch_notify(struct net_device *dev,
12946                                struct cfg80211_chan_def *chandef)
12947 {
12948         struct wireless_dev *wdev = dev->ieee80211_ptr;
12949         struct wiphy *wiphy = wdev->wiphy;
12950         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12951
12952         ASSERT_WDEV_LOCK(wdev);
12953
12954         trace_cfg80211_ch_switch_notify(dev, chandef);
12955
12956         wdev->chandef = *chandef;
12957         wdev->preset_chandef = *chandef;
12958         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12959                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12960 }
12961 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12962
12963 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12964                                        struct cfg80211_chan_def *chandef,
12965                                        u8 count)
12966 {
12967         struct wireless_dev *wdev = dev->ieee80211_ptr;
12968         struct wiphy *wiphy = wdev->wiphy;
12969         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12970
12971         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12972
12973         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12974                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12975 }
12976 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12977
12978 void
12979 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12980                      const struct cfg80211_chan_def *chandef,
12981                      enum nl80211_radar_event event,
12982                      struct net_device *netdev, gfp_t gfp)
12983 {
12984         struct sk_buff *msg;
12985         void *hdr;
12986
12987         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12988         if (!msg)
12989                 return;
12990
12991         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12992         if (!hdr) {
12993                 nlmsg_free(msg);
12994                 return;
12995         }
12996
12997         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12998                 goto nla_put_failure;
12999
13000         /* NOP and radar events don't need a netdev parameter */
13001         if (netdev) {
13002                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13003
13004                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13005                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13006                         goto nla_put_failure;
13007         }
13008
13009         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13010                 goto nla_put_failure;
13011
13012         if (nl80211_send_chandef(msg, chandef))
13013                 goto nla_put_failure;
13014
13015         genlmsg_end(msg, hdr);
13016
13017         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13018                                 NL80211_MCGRP_MLME, gfp);
13019         return;
13020
13021  nla_put_failure:
13022         genlmsg_cancel(msg, hdr);
13023         nlmsg_free(msg);
13024 }
13025
13026 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13027                            u64 cookie, bool acked, gfp_t gfp)
13028 {
13029         struct wireless_dev *wdev = dev->ieee80211_ptr;
13030         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13031         struct sk_buff *msg;
13032         void *hdr;
13033
13034         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13035
13036         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13037
13038         if (!msg)
13039                 return;
13040
13041         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13042         if (!hdr) {
13043                 nlmsg_free(msg);
13044                 return;
13045         }
13046
13047         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13048             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13049             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13050             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
13051             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13052                 goto nla_put_failure;
13053
13054         genlmsg_end(msg, hdr);
13055
13056         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13057                                 NL80211_MCGRP_MLME, gfp);
13058         return;
13059
13060  nla_put_failure:
13061         genlmsg_cancel(msg, hdr);
13062         nlmsg_free(msg);
13063 }
13064 EXPORT_SYMBOL(cfg80211_probe_status);
13065
13066 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13067                                  const u8 *frame, size_t len,
13068                                  int freq, int sig_dbm)
13069 {
13070         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13071         struct sk_buff *msg;
13072         void *hdr;
13073         struct cfg80211_beacon_registration *reg;
13074
13075         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13076
13077         spin_lock_bh(&rdev->beacon_registrations_lock);
13078         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13079                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13080                 if (!msg) {
13081                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13082                         return;
13083                 }
13084
13085                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13086                 if (!hdr)
13087                         goto nla_put_failure;
13088
13089                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13090                     (freq &&
13091                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13092                     (sig_dbm &&
13093                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13094                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13095                         goto nla_put_failure;
13096
13097                 genlmsg_end(msg, hdr);
13098
13099                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13100         }
13101         spin_unlock_bh(&rdev->beacon_registrations_lock);
13102         return;
13103
13104  nla_put_failure:
13105         spin_unlock_bh(&rdev->beacon_registrations_lock);
13106         if (hdr)
13107                 genlmsg_cancel(msg, hdr);
13108         nlmsg_free(msg);
13109 }
13110 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13111
13112 #ifdef CONFIG_PM
13113 static int cfg80211_net_detect_results(struct sk_buff *msg,
13114                                        struct cfg80211_wowlan_wakeup *wakeup)
13115 {
13116         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13117         struct nlattr *nl_results, *nl_match, *nl_freqs;
13118         int i, j;
13119
13120         nl_results = nla_nest_start(
13121                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13122         if (!nl_results)
13123                 return -EMSGSIZE;
13124
13125         for (i = 0; i < nd->n_matches; i++) {
13126                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13127
13128                 nl_match = nla_nest_start(msg, i);
13129                 if (!nl_match)
13130                         break;
13131
13132                 /* The SSID attribute is optional in nl80211, but for
13133                  * simplicity reasons it's always present in the
13134                  * cfg80211 structure.  If a driver can't pass the
13135                  * SSID, that needs to be changed.  A zero length SSID
13136                  * is still a valid SSID (wildcard), so it cannot be
13137                  * used for this purpose.
13138                  */
13139                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13140                             match->ssid.ssid)) {
13141                         nla_nest_cancel(msg, nl_match);
13142                         goto out;
13143                 }
13144
13145                 if (match->n_channels) {
13146                         nl_freqs = nla_nest_start(
13147                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13148                         if (!nl_freqs) {
13149                                 nla_nest_cancel(msg, nl_match);
13150                                 goto out;
13151                         }
13152
13153                         for (j = 0; j < match->n_channels; j++) {
13154                                 if (nla_put_u32(msg, j, match->channels[j])) {
13155                                         nla_nest_cancel(msg, nl_freqs);
13156                                         nla_nest_cancel(msg, nl_match);
13157                                         goto out;
13158                                 }
13159                         }
13160
13161                         nla_nest_end(msg, nl_freqs);
13162                 }
13163
13164                 nla_nest_end(msg, nl_match);
13165         }
13166
13167 out:
13168         nla_nest_end(msg, nl_results);
13169         return 0;
13170 }
13171
13172 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13173                                    struct cfg80211_wowlan_wakeup *wakeup,
13174                                    gfp_t gfp)
13175 {
13176         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13177         struct sk_buff *msg;
13178         void *hdr;
13179         int size = 200;
13180
13181         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13182
13183         if (wakeup)
13184                 size += wakeup->packet_present_len;
13185
13186         msg = nlmsg_new(size, gfp);
13187         if (!msg)
13188                 return;
13189
13190         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13191         if (!hdr)
13192                 goto free_msg;
13193
13194         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13195             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13196                 goto free_msg;
13197
13198         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13199                                         wdev->netdev->ifindex))
13200                 goto free_msg;
13201
13202         if (wakeup) {
13203                 struct nlattr *reasons;
13204
13205                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13206                 if (!reasons)
13207                         goto free_msg;
13208
13209                 if (wakeup->disconnect &&
13210                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13211                         goto free_msg;
13212                 if (wakeup->magic_pkt &&
13213                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13214                         goto free_msg;
13215                 if (wakeup->gtk_rekey_failure &&
13216                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13217                         goto free_msg;
13218                 if (wakeup->eap_identity_req &&
13219                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13220                         goto free_msg;
13221                 if (wakeup->four_way_handshake &&
13222                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13223                         goto free_msg;
13224                 if (wakeup->rfkill_release &&
13225                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13226                         goto free_msg;
13227
13228                 if (wakeup->pattern_idx >= 0 &&
13229                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13230                                 wakeup->pattern_idx))
13231                         goto free_msg;
13232
13233                 if (wakeup->tcp_match &&
13234                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13235                         goto free_msg;
13236
13237                 if (wakeup->tcp_connlost &&
13238                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13239                         goto free_msg;
13240
13241                 if (wakeup->tcp_nomoretokens &&
13242                     nla_put_flag(msg,
13243                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13244                         goto free_msg;
13245
13246                 if (wakeup->packet) {
13247                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13248                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13249
13250                         if (!wakeup->packet_80211) {
13251                                 pkt_attr =
13252                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13253                                 len_attr =
13254                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13255                         }
13256
13257                         if (wakeup->packet_len &&
13258                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13259                                 goto free_msg;
13260
13261                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13262                                     wakeup->packet))
13263                                 goto free_msg;
13264                 }
13265
13266                 if (wakeup->net_detect &&
13267                     cfg80211_net_detect_results(msg, wakeup))
13268                                 goto free_msg;
13269
13270                 nla_nest_end(msg, reasons);
13271         }
13272
13273         genlmsg_end(msg, hdr);
13274
13275         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13276                                 NL80211_MCGRP_MLME, gfp);
13277         return;
13278
13279  free_msg:
13280         nlmsg_free(msg);
13281 }
13282 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13283 #endif
13284
13285 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13286                                 enum nl80211_tdls_operation oper,
13287                                 u16 reason_code, gfp_t gfp)
13288 {
13289         struct wireless_dev *wdev = dev->ieee80211_ptr;
13290         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13291         struct sk_buff *msg;
13292         void *hdr;
13293
13294         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13295                                          reason_code);
13296
13297         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13298         if (!msg)
13299                 return;
13300
13301         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13302         if (!hdr) {
13303                 nlmsg_free(msg);
13304                 return;
13305         }
13306
13307         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13308             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13309             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13310             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13311             (reason_code > 0 &&
13312              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13313                 goto nla_put_failure;
13314
13315         genlmsg_end(msg, hdr);
13316
13317         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13318                                 NL80211_MCGRP_MLME, gfp);
13319         return;
13320
13321  nla_put_failure:
13322         genlmsg_cancel(msg, hdr);
13323         nlmsg_free(msg);
13324 }
13325 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13326
13327 static int nl80211_netlink_notify(struct notifier_block * nb,
13328                                   unsigned long state,
13329                                   void *_notify)
13330 {
13331         struct netlink_notify *notify = _notify;
13332         struct cfg80211_registered_device *rdev;
13333         struct wireless_dev *wdev;
13334         struct cfg80211_beacon_registration *reg, *tmp;
13335
13336         if (state != NETLINK_URELEASE)
13337                 return NOTIFY_DONE;
13338
13339         rcu_read_lock();
13340
13341         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13342                 bool schedule_destroy_work = false;
13343                 bool schedule_scan_stop = false;
13344                 struct cfg80211_sched_scan_request *sched_scan_req =
13345                         rcu_dereference(rdev->sched_scan_req);
13346
13347                 if (sched_scan_req && notify->portid &&
13348                     sched_scan_req->owner_nlportid == notify->portid)
13349                         schedule_scan_stop = true;
13350
13351                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13352                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13353
13354                         if (wdev->owner_nlportid == notify->portid)
13355                                 schedule_destroy_work = true;
13356                 }
13357
13358                 spin_lock_bh(&rdev->beacon_registrations_lock);
13359                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13360                                          list) {
13361                         if (reg->nlportid == notify->portid) {
13362                                 list_del(&reg->list);
13363                                 kfree(reg);
13364                                 break;
13365                         }
13366                 }
13367                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13368
13369                 if (schedule_destroy_work) {
13370                         struct cfg80211_iface_destroy *destroy;
13371
13372                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13373                         if (destroy) {
13374                                 destroy->nlportid = notify->portid;
13375                                 spin_lock(&rdev->destroy_list_lock);
13376                                 list_add(&destroy->list, &rdev->destroy_list);
13377                                 spin_unlock(&rdev->destroy_list_lock);
13378                                 schedule_work(&rdev->destroy_work);
13379                         }
13380                 } else if (schedule_scan_stop) {
13381                         sched_scan_req->owner_nlportid = 0;
13382
13383                         if (rdev->ops->sched_scan_stop &&
13384                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13385                                 schedule_work(&rdev->sched_scan_stop_wk);
13386                 }
13387         }
13388
13389         rcu_read_unlock();
13390
13391         /*
13392          * It is possible that the user space process that is controlling the
13393          * indoor setting disappeared, so notify the regulatory core.
13394          */
13395         regulatory_netlink_notify(notify->portid);
13396         return NOTIFY_OK;
13397 }
13398
13399 static struct notifier_block nl80211_netlink_notifier = {
13400         .notifier_call = nl80211_netlink_notify,
13401 };
13402
13403 void cfg80211_ft_event(struct net_device *netdev,
13404                        struct cfg80211_ft_event_params *ft_event)
13405 {
13406         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13407         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13408         struct sk_buff *msg;
13409         void *hdr;
13410
13411         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13412
13413         if (!ft_event->target_ap)
13414                 return;
13415
13416         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13417         if (!msg)
13418                 return;
13419
13420         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13421         if (!hdr)
13422                 goto out;
13423
13424         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13425             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13426             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13427                 goto out;
13428
13429         if (ft_event->ies &&
13430             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13431                 goto out;
13432         if (ft_event->ric_ies &&
13433             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13434                     ft_event->ric_ies))
13435                 goto out;
13436
13437         genlmsg_end(msg, hdr);
13438
13439         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13440                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13441         return;
13442  out:
13443         nlmsg_free(msg);
13444 }
13445 EXPORT_SYMBOL(cfg80211_ft_event);
13446
13447 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13448 {
13449         struct cfg80211_registered_device *rdev;
13450         struct sk_buff *msg;
13451         void *hdr;
13452         u32 nlportid;
13453
13454         rdev = wiphy_to_rdev(wdev->wiphy);
13455         if (!rdev->crit_proto_nlportid)
13456                 return;
13457
13458         nlportid = rdev->crit_proto_nlportid;
13459         rdev->crit_proto_nlportid = 0;
13460
13461         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13462         if (!msg)
13463                 return;
13464
13465         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13466         if (!hdr)
13467                 goto nla_put_failure;
13468
13469         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13470             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13471                 goto nla_put_failure;
13472
13473         genlmsg_end(msg, hdr);
13474
13475         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13476         return;
13477
13478  nla_put_failure:
13479         if (hdr)
13480                 genlmsg_cancel(msg, hdr);
13481         nlmsg_free(msg);
13482
13483 }
13484 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13485
13486 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13487 {
13488         struct wiphy *wiphy = wdev->wiphy;
13489         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13490         struct sk_buff *msg;
13491         void *hdr;
13492
13493         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13494         if (!msg)
13495                 return;
13496
13497         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13498         if (!hdr)
13499                 goto out;
13500
13501         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13502             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13503             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13504                 goto out;
13505
13506         genlmsg_end(msg, hdr);
13507
13508         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13509                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13510         return;
13511  out:
13512         nlmsg_free(msg);
13513 }
13514
13515 /* initialisation/exit functions */
13516
13517 int nl80211_init(void)
13518 {
13519         int err;
13520
13521         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13522                                                    nl80211_mcgrps);
13523         if (err)
13524                 return err;
13525
13526         err = netlink_register_notifier(&nl80211_netlink_notifier);
13527         if (err)
13528                 goto err_out;
13529
13530         return 0;
13531  err_out:
13532         genl_unregister_family(&nl80211_fam);
13533         return err;
13534 }
13535
13536 void nl80211_exit(void)
13537 {
13538         netlink_unregister_notifier(&nl80211_netlink_notifier);
13539         genl_unregister_family(&nl80211_fam);
13540 }