net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2016  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                             struct genl_info *info);
  37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  38                               struct genl_info *info);
  39
  40 /* the netlink family */
  41 static struct genl_family nl80211_fam = {
  42         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  43         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  44         .hdrsize = 0,                   /* no private header */
  45         .version = 1,                   /* no particular meaning now */
  46         .maxattr = NL80211_ATTR_MAX,
  47         .netnsok = true,
  48         .pre_doit = nl80211_pre_doit,
  49         .post_doit = nl80211_post_doit,
  50 };
  51
  52 /* multicast groups */
  53 enum nl80211_multicast_groups {
  54         NL80211_MCGRP_CONFIG,
  55         NL80211_MCGRP_SCAN,
  56         NL80211_MCGRP_REGULATORY,
  57         NL80211_MCGRP_MLME,
  58         NL80211_MCGRP_VENDOR,
  59         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  60 };
  61
  62 static const struct genl_multicast_group nl80211_mcgrps[] = {
  63         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  64         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  65         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  66         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  67         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  68 #ifdef CONFIG_NL80211_TESTMODE
  69         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  70 #endif
  71 };
  72
  73 /* returns ERR_PTR values */
  74 static struct wireless_dev *
  75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  76 {
  77         struct cfg80211_registered_device *rdev;
  78         struct wireless_dev *result = NULL;
  79         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  80         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  81         u64 wdev_id;
  82         int wiphy_idx = -1;
  83         int ifidx = -1;
  84
  85         ASSERT_RTNL();
  86
  87         if (!have_ifidx && !have_wdev_id)
  88                 return ERR_PTR(-EINVAL);
  89
  90         if (have_ifidx)
  91                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  92         if (have_wdev_id) {
  93                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  94                 wiphy_idx = wdev_id >> 32;
  95         }
  96
  97         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  98                 struct wireless_dev *wdev;
  99
 100                 if (wiphy_net(&rdev->wiphy) != netns)
 101                         continue;
 102
 103                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 104                         continue;
 105
 106                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 107                         if (have_ifidx && wdev->netdev &&
 108                             wdev->netdev->ifindex == ifidx) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 113                                 result = wdev;
 114                                 break;
 115                         }
 116                 }
 117
 118                 if (result)
 119                         break;
 120         }
 121
 122         if (result)
 123                 return result;
 124         return ERR_PTR(-ENODEV);
 125 }
 126
 127 static struct cfg80211_registered_device *
 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 129 {
 130         struct cfg80211_registered_device *rdev = NULL, *tmp;
 131         struct net_device *netdev;
 132
 133         ASSERT_RTNL();
 134
 135         if (!attrs[NL80211_ATTR_WIPHY] &&
 136             !attrs[NL80211_ATTR_IFINDEX] &&
 137             !attrs[NL80211_ATTR_WDEV])
 138                 return ERR_PTR(-EINVAL);
 139
 140         if (attrs[NL80211_ATTR_WIPHY])
 141                 rdev = cfg80211_rdev_by_wiphy_idx(
 142                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 143
 144         if (attrs[NL80211_ATTR_WDEV]) {
 145                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 146                 struct wireless_dev *wdev;
 147                 bool found = false;
 148
 149                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 150                 if (tmp) {
 151                         /* make sure wdev exists */
 152                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 153                                 if (wdev->identifier != (u32)wdev_id)
 154                                         continue;
 155                                 found = true;
 156                                 break;
 157                         }
 158
 159                         if (!found)
 160                                 tmp = NULL;
 161
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164                         rdev = tmp;
 165                 }
 166         }
 167
 168         if (attrs[NL80211_ATTR_IFINDEX]) {
 169                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 170                 netdev = __dev_get_by_index(netns, ifindex);
 171                 if (netdev) {
 172                         if (netdev->ieee80211_ptr)
 173                                 tmp = wiphy_to_rdev(
 174                                         netdev->ieee80211_ptr->wiphy);
 175                         else
 176                                 tmp = NULL;
 177
 178                         /* not wireless device -- return error */
 179                         if (!tmp)
 180                                 return ERR_PTR(-EINVAL);
 181
 182                         /* mismatch -- return error */
 183                         if (rdev && tmp != rdev)
 184                                 return ERR_PTR(-EINVAL);
 185
 186                         rdev = tmp;
 187                 }
 188         }
 189
 190         if (!rdev)
 191                 return ERR_PTR(-ENODEV);
 192
 193         if (netns != wiphy_net(&rdev->wiphy))
 194                 return ERR_PTR(-ENODEV);
 195
 196         return rdev;
 197 }
 198
 199 /*
 200  * This function returns a pointer to the driver
 201  * that the genl_info item that is passed refers to.
 202  *
 203  * The result of this can be a PTR_ERR and hence must
 204  * be checked with IS_ERR() for errors.
 205  */
 206 static struct cfg80211_registered_device *
 207 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 208 {
 209         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 210 }
 211
 212 /* policy for the attributes */
 213 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 214         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 215         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 216                                       .len = 20-1 },
 217         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 218
 219         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 220         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 224
 225         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 226         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 230         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 231
 232         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 235
 236         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 237         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 238
 239         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 240         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 241                                     .len = WLAN_MAX_KEY_LEN },
 242         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 243         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 244         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 245         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 246         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 247
 248         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 249         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 250         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 251                                        .len = IEEE80211_MAX_DATA_LEN },
 252         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 253                                        .len = IEEE80211_MAX_DATA_LEN },
 254         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 255         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 256         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 257         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 258                                                .len = NL80211_MAX_SUPP_RATES },
 259         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 260         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 261         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 262         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 263                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 264         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 265
 266         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 267         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 268
 269         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 270         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 273                                            .len = NL80211_MAX_SUPP_RATES },
 274         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 275
 276         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 277         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 278
 279         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 280
 281         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 282         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 283                               .len = IEEE80211_MAX_DATA_LEN },
 284         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 286
 287         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 288                                 .len = IEEE80211_MAX_SSID_LEN },
 289         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 290         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 291         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 294         [NL80211_ATTR_STA_FLAGS2] = {
 295                 .len = sizeof(struct nl80211_sta_flag_update),
 296         },
 297         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 303         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 304         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 305         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 306                                  .len = WLAN_PMKID_LEN },
 307         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 308         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 309         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 310         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 311                                  .len = IEEE80211_MAX_DATA_LEN },
 312         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 313         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 314         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 315         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 317         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 319         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 320         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 323         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 327         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 328         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 329         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 331         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 332                                          .len = IEEE80211_MAX_DATA_LEN },
 333         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 334                                          .len = IEEE80211_MAX_DATA_LEN },
 335         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 336         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 339         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 346                                       .len = IEEE80211_MAX_DATA_LEN },
 347         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 350                 .len = NL80211_HT_CAPABILITY_LEN
 351         },
 352         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 353         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 354         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 355         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 356         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 357         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 358         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 359         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 360         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 361         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 362         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 363         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 364         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 365         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 366         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 367         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 368         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 369                 .len = NL80211_VHT_CAPABILITY_LEN,
 370         },
 371         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 372         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 373                                   .len = IEEE80211_MAX_DATA_LEN },
 374         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 375         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 376         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 377         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 378         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 383         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 384         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 385         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 387         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 388                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 389         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 390         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 391         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 394         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 395         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 396         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 397         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 398         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 399         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 401         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 402         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 403         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 404         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 405         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 406         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 407 };
 408
 409 /* policy for the key attributes */
 410 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 411         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 412         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 413         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 414         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 415         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 416         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 417         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 418         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 419 };
 420
 421 /* policy for the key default flags */
 422 static const struct nla_policy
 423 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 424         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 425         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 426 };
 427
 428 /* policy for WoWLAN attributes */
 429 static const struct nla_policy
 430 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 431         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 432         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 433         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 435         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 436         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 440         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 441 };
 442
 443 static const struct nla_policy
 444 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 445         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 446         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 447         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 448         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 449         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 450         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 451         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 452                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 453         },
 454         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 455                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 456         },
 457         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 458         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 459         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 460 };
 461
 462 /* policy for coalesce rule attributes */
 463 static const struct nla_policy
 464 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 465         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 466         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 467         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 468 };
 469
 470 /* policy for GTK rekey offload attributes */
 471 static const struct nla_policy
 472 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 473         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 474         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 475         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 476 };
 477
 478 static const struct nla_policy
 479 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 480         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 481                                                  .len = IEEE80211_MAX_SSID_LEN },
 482         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 483 };
 484
 485 static const struct nla_policy
 486 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 487         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 488         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 489 };
 490
 491 static const struct nla_policy
 492 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 493         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 494         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 495         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 496                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 497         },
 498 };
 499
 500 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 501                                      struct netlink_callback *cb,
 502                                      struct cfg80211_registered_device **rdev,
 503                                      struct wireless_dev **wdev)
 504 {
 505         int err;
 506
 507         rtnl_lock();
 508
 509         if (!cb->args[0]) {
 510                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 511                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 512                                   nl80211_policy);
 513                 if (err)
 514                         goto out_unlock;
 515
 516                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 517                                                    nl80211_fam.attrbuf);
 518                 if (IS_ERR(*wdev)) {
 519                         err = PTR_ERR(*wdev);
 520                         goto out_unlock;
 521                 }
 522                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 523                 /* 0 is the first index - add 1 to parse only once */
 524                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 525                 cb->args[1] = (*wdev)->identifier;
 526         } else {
 527                 /* subtract the 1 again here */
 528                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 529                 struct wireless_dev *tmp;
 530
 531                 if (!wiphy) {
 532                         err = -ENODEV;
 533                         goto out_unlock;
 534                 }
 535                 *rdev = wiphy_to_rdev(wiphy);
 536                 *wdev = NULL;
 537
 538                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 539                         if (tmp->identifier == cb->args[1]) {
 540                                 *wdev = tmp;
 541                                 break;
 542                         }
 543                 }
 544
 545                 if (!*wdev) {
 546                         err = -ENODEV;
 547                         goto out_unlock;
 548                 }
 549         }
 550
 551         return 0;
 552  out_unlock:
 553         rtnl_unlock();
 554         return err;
 555 }
 556
 557 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 558 {
 559         rtnl_unlock();
 560 }
 561
 562 /* IE validation */
 563 static bool is_valid_ie_attr(const struct nlattr *attr)
 564 {
 565         const u8 *pos;
 566         int len;
 567
 568         if (!attr)
 569                 return true;
 570
 571         pos = nla_data(attr);
 572         len = nla_len(attr);
 573
 574         while (len) {
 575                 u8 elemlen;
 576
 577                 if (len < 2)
 578                         return false;
 579                 len -= 2;
 580
 581                 elemlen = pos[1];
 582                 if (elemlen > len)
 583                         return false;
 584
 585                 len -= elemlen;
 586                 pos += 2 + elemlen;
 587         }
 588
 589         return true;
 590 }
 591
 592 /* message building helper */
 593 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 594                                    int flags, u8 cmd)
 595 {
 596         /* since there is no private header just add the generic one */
 597         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 598 }
 599
 600 static int nl80211_msg_put_channel(struct sk_buff *msg,
 601                                    struct ieee80211_channel *chan,
 602                                    bool large)
 603 {
 604         /* Some channels must be completely excluded from the
 605          * list to protect old user-space tools from breaking
 606          */
 607         if (!large && chan->flags &
 608             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 609                 return 0;
 610
 611         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 612                         chan->center_freq))
 613                 goto nla_put_failure;
 614
 615         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 616             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 617                 goto nla_put_failure;
 618         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 619                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 620                         goto nla_put_failure;
 621                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 622                         goto nla_put_failure;
 623         }
 624         if (chan->flags & IEEE80211_CHAN_RADAR) {
 625                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 626                         goto nla_put_failure;
 627                 if (large) {
 628                         u32 time;
 629
 630                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 631
 632                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 633                                         chan->dfs_state))
 634                                 goto nla_put_failure;
 635                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 636                                         time))
 637                                 goto nla_put_failure;
 638                         if (nla_put_u32(msg,
 639                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 640                                         chan->dfs_cac_ms))
 641                                 goto nla_put_failure;
 642                 }
 643         }
 644
 645         if (large) {
 646                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 647                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 648                         goto nla_put_failure;
 649                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 650                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 651                         goto nla_put_failure;
 652                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 653                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 654                         goto nla_put_failure;
 655                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 656                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 657                         goto nla_put_failure;
 658                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 659                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 660                         goto nla_put_failure;
 661                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 662                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 663                         goto nla_put_failure;
 664                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 665                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 666                         goto nla_put_failure;
 667                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 668                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 669                         goto nla_put_failure;
 670         }
 671
 672         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 673                         DBM_TO_MBM(chan->max_power)))
 674                 goto nla_put_failure;
 675
 676         return 0;
 677
 678  nla_put_failure:
 679         return -ENOBUFS;
 680 }
 681
 682 /* netlink command implementations */
 683
 684 struct key_parse {
 685         struct key_params p;
 686         int idx;
 687         int type;
 688         bool def, defmgmt;
 689         bool def_uni, def_multi;
 690 };
 691
 692 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 693 {
 694         struct nlattr *tb[NL80211_KEY_MAX + 1];
 695         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 696                                    nl80211_key_policy);
 697         if (err)
 698                 return err;
 699
 700         k->def = !!tb[NL80211_KEY_DEFAULT];
 701         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 702
 703         if (k->def) {
 704                 k->def_uni = true;
 705                 k->def_multi = true;
 706         }
 707         if (k->defmgmt)
 708                 k->def_multi = true;
 709
 710         if (tb[NL80211_KEY_IDX])
 711                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 712
 713         if (tb[NL80211_KEY_DATA]) {
 714                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 715                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 716         }
 717
 718         if (tb[NL80211_KEY_SEQ]) {
 719                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 720                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 721         }
 722
 723         if (tb[NL80211_KEY_CIPHER])
 724                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 725
 726         if (tb[NL80211_KEY_TYPE]) {
 727                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 728                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 729                         return -EINVAL;
 730         }
 731
 732         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 733                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 734                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 735                                        tb[NL80211_KEY_DEFAULT_TYPES],
 736                                        nl80211_key_default_policy);
 737                 if (err)
 738                         return err;
 739
 740                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 741                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 742         }
 743
 744         return 0;
 745 }
 746
 747 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 748 {
 749         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 750                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 751                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 752         }
 753
 754         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 755                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 756                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 757         }
 758
 759         if (info->attrs[NL80211_ATTR_KEY_IDX])
 760                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 761
 762         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 763                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 764
 765         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 766         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 767
 768         if (k->def) {
 769                 k->def_uni = true;
 770                 k->def_multi = true;
 771         }
 772         if (k->defmgmt)
 773                 k->def_multi = true;
 774
 775         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 776                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 777                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 778                         return -EINVAL;
 779         }
 780
 781         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 782                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 783                 int err = nla_parse_nested(
 784                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 785                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 786                                 nl80211_key_default_policy);
 787                 if (err)
 788                         return err;
 789
 790                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 791                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 792         }
 793
 794         return 0;
 795 }
 796
 797 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 798 {
 799         int err;
 800
 801         memset(k, 0, sizeof(*k));
 802         k->idx = -1;
 803         k->type = -1;
 804
 805         if (info->attrs[NL80211_ATTR_KEY])
 806                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 807         else
 808                 err = nl80211_parse_key_old(info, k);
 809
 810         if (err)
 811                 return err;
 812
 813         if (k->def && k->defmgmt)
 814                 return -EINVAL;
 815
 816         if (k->defmgmt) {
 817                 if (k->def_uni || !k->def_multi)
 818                         return -EINVAL;
 819         }
 820
 821         if (k->idx != -1) {
 822                 if (k->defmgmt) {
 823                         if (k->idx < 4 || k->idx > 5)
 824                                 return -EINVAL;
 825                 } else if (k->def) {
 826                         if (k->idx < 0 || k->idx > 3)
 827                                 return -EINVAL;
 828                 } else {
 829                         if (k->idx < 0 || k->idx > 5)
 830                                 return -EINVAL;
 831                 }
 832         }
 833
 834         return 0;
 835 }
 836
 837 static struct cfg80211_cached_keys *
 838 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 839                        struct nlattr *keys, bool *no_ht)
 840 {
 841         struct key_parse parse;
 842         struct nlattr *key;
 843         struct cfg80211_cached_keys *result;
 844         int rem, err, def = 0;
 845
 846         result = kzalloc(sizeof(*result), GFP_KERNEL);
 847         if (!result)
 848                 return ERR_PTR(-ENOMEM);
 849
 850         result->def = -1;
 851         result->defmgmt = -1;
 852
 853         nla_for_each_nested(key, keys, rem) {
 854                 memset(&parse, 0, sizeof(parse));
 855                 parse.idx = -1;
 856
 857                 err = nl80211_parse_key_new(key, &parse);
 858                 if (err)
 859                         goto error;
 860                 err = -EINVAL;
 861                 if (!parse.p.key)
 862                         goto error;
 863                 if (parse.idx < 0 || parse.idx > 4)
 864                         goto error;
 865                 if (parse.def) {
 866                         if (def)
 867                                 goto error;
 868                         def = 1;
 869                         result->def = parse.idx;
 870                         if (!parse.def_uni || !parse.def_multi)
 871                                 goto error;
 872                 } else if (parse.defmgmt)
 873                         goto error;
 874                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 875                                                      parse.idx, false, NULL);
 876                 if (err)
 877                         goto error;
 878                 result->params[parse.idx].cipher = parse.p.cipher;
 879                 result->params[parse.idx].key_len = parse.p.key_len;
 880                 result->params[parse.idx].key = result->data[parse.idx];
 881                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 882
 883                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 884                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 885                         if (no_ht)
 886                                 *no_ht = true;
 887                 }
 888         }
 889
 890         return result;
 891  error:
 892         kfree(result);
 893         return ERR_PTR(err);
 894 }
 895
 896 static int nl80211_key_allowed(struct wireless_dev *wdev)
 897 {
 898         ASSERT_WDEV_LOCK(wdev);
 899
 900         switch (wdev->iftype) {
 901         case NL80211_IFTYPE_AP:
 902         case NL80211_IFTYPE_AP_VLAN:
 903         case NL80211_IFTYPE_P2P_GO:
 904         case NL80211_IFTYPE_MESH_POINT:
 905                 break;
 906         case NL80211_IFTYPE_ADHOC:
 907         case NL80211_IFTYPE_STATION:
 908         case NL80211_IFTYPE_P2P_CLIENT:
 909                 if (!wdev->current_bss)
 910                         return -ENOLINK;
 911                 break;
 912         case NL80211_IFTYPE_UNSPECIFIED:
 913         case NL80211_IFTYPE_OCB:
 914         case NL80211_IFTYPE_MONITOR:
 915         case NL80211_IFTYPE_P2P_DEVICE:
 916         case NL80211_IFTYPE_WDS:
 917         case NUM_NL80211_IFTYPES:
 918                 return -EINVAL;
 919         }
 920
 921         return 0;
 922 }
 923
 924 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 925                                                         struct nlattr *tb)
 926 {
 927         struct ieee80211_channel *chan;
 928
 929         if (tb == NULL)
 930                 return NULL;
 931         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 932         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 933                 return NULL;
 934         return chan;
 935 }
 936
 937 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 938 {
 939         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 940         int i;
 941
 942         if (!nl_modes)
 943                 goto nla_put_failure;
 944
 945         i = 0;
 946         while (ifmodes) {
 947                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 948                         goto nla_put_failure;
 949                 ifmodes >>= 1;
 950                 i++;
 951         }
 952
 953         nla_nest_end(msg, nl_modes);
 954         return 0;
 955
 956 nla_put_failure:
 957         return -ENOBUFS;
 958 }
 959
 960 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 961                                           struct sk_buff *msg,
 962                                           bool large)
 963 {
 964         struct nlattr *nl_combis;
 965         int i, j;
 966
 967         nl_combis = nla_nest_start(msg,
 968                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 969         if (!nl_combis)
 970                 goto nla_put_failure;
 971
 972         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 973                 const struct ieee80211_iface_combination *c;
 974                 struct nlattr *nl_combi, *nl_limits;
 975
 976                 c = &wiphy->iface_combinations[i];
 977
 978                 nl_combi = nla_nest_start(msg, i + 1);
 979                 if (!nl_combi)
 980                         goto nla_put_failure;
 981
 982                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 983                 if (!nl_limits)
 984                         goto nla_put_failure;
 985
 986                 for (j = 0; j < c->n_limits; j++) {
 987                         struct nlattr *nl_limit;
 988
 989                         nl_limit = nla_nest_start(msg, j + 1);
 990                         if (!nl_limit)
 991                                 goto nla_put_failure;
 992                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 993                                         c->limits[j].max))
 994                                 goto nla_put_failure;
 995                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 996                                                 c->limits[j].types))
 997                                 goto nla_put_failure;
 998                         nla_nest_end(msg, nl_limit);
 999                 }
1000
1001                 nla_nest_end(msg, nl_limits);
1002
1003                 if (c->beacon_int_infra_match &&
1004                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1005                         goto nla_put_failure;
1006                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1007                                 c->num_different_channels) ||
1008                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1009                                 c->max_interfaces))
1010                         goto nla_put_failure;
1011                 if (large &&
1012                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1013                                 c->radar_detect_widths) ||
1014                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1015                                 c->radar_detect_regions)))
1016                         goto nla_put_failure;
1017
1018                 nla_nest_end(msg, nl_combi);
1019         }
1020
1021         nla_nest_end(msg, nl_combis);
1022
1023         return 0;
1024 nla_put_failure:
1025         return -ENOBUFS;
1026 }
1027
1028 #ifdef CONFIG_PM
1029 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1030                                         struct sk_buff *msg)
1031 {
1032         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1033         struct nlattr *nl_tcp;
1034
1035         if (!tcp)
1036                 return 0;
1037
1038         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1039         if (!nl_tcp)
1040                 return -ENOBUFS;
1041
1042         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1043                         tcp->data_payload_max))
1044                 return -ENOBUFS;
1045
1046         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1047                         tcp->data_payload_max))
1048                 return -ENOBUFS;
1049
1050         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1051                 return -ENOBUFS;
1052
1053         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1054                                 sizeof(*tcp->tok), tcp->tok))
1055                 return -ENOBUFS;
1056
1057         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1058                         tcp->data_interval_max))
1059                 return -ENOBUFS;
1060
1061         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1062                         tcp->wake_payload_max))
1063                 return -ENOBUFS;
1064
1065         nla_nest_end(msg, nl_tcp);
1066         return 0;
1067 }
1068
1069 static int nl80211_send_wowlan(struct sk_buff *msg,
1070                                struct cfg80211_registered_device *rdev,
1071                                bool large)
1072 {
1073         struct nlattr *nl_wowlan;
1074
1075         if (!rdev->wiphy.wowlan)
1076                 return 0;
1077
1078         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1079         if (!nl_wowlan)
1080                 return -ENOBUFS;
1081
1082         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1083              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1084             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1085              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1086             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1087              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1088             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1089              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1090             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1091              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1092             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1093              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1094             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1095              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1096             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1097              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1098                 return -ENOBUFS;
1099
1100         if (rdev->wiphy.wowlan->n_patterns) {
1101                 struct nl80211_pattern_support pat = {
1102                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1103                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1104                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1105                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1106                 };
1107
1108                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1109                             sizeof(pat), &pat))
1110                         return -ENOBUFS;
1111         }
1112
1113         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1114             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1115                         rdev->wiphy.wowlan->max_nd_match_sets))
1116                 return -ENOBUFS;
1117
1118         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1119                 return -ENOBUFS;
1120
1121         nla_nest_end(msg, nl_wowlan);
1122
1123         return 0;
1124 }
1125 #endif
1126
1127 static int nl80211_send_coalesce(struct sk_buff *msg,
1128                                  struct cfg80211_registered_device *rdev)
1129 {
1130         struct nl80211_coalesce_rule_support rule;
1131
1132         if (!rdev->wiphy.coalesce)
1133                 return 0;
1134
1135         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1136         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1137         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1138         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1139         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1140         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1141
1142         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1143                 return -ENOBUFS;
1144
1145         return 0;
1146 }
1147
1148 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1149                                       struct ieee80211_supported_band *sband)
1150 {
1151         struct nlattr *nl_rates, *nl_rate;
1152         struct ieee80211_rate *rate;
1153         int i;
1154
1155         /* add HT info */
1156         if (sband->ht_cap.ht_supported &&
1157             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1158                      sizeof(sband->ht_cap.mcs),
1159                      &sband->ht_cap.mcs) ||
1160              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1161                          sband->ht_cap.cap) ||
1162              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1163                         sband->ht_cap.ampdu_factor) ||
1164              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1165                         sband->ht_cap.ampdu_density)))
1166                 return -ENOBUFS;
1167
1168         /* add VHT info */
1169         if (sband->vht_cap.vht_supported &&
1170             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1171                      sizeof(sband->vht_cap.vht_mcs),
1172                      &sband->vht_cap.vht_mcs) ||
1173              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1174                          sband->vht_cap.cap)))
1175                 return -ENOBUFS;
1176
1177         /* add bitrates */
1178         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1179         if (!nl_rates)
1180                 return -ENOBUFS;
1181
1182         for (i = 0; i < sband->n_bitrates; i++) {
1183                 nl_rate = nla_nest_start(msg, i);
1184                 if (!nl_rate)
1185                         return -ENOBUFS;
1186
1187                 rate = &sband->bitrates[i];
1188                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1189                                 rate->bitrate))
1190                         return -ENOBUFS;
1191                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1192                     nla_put_flag(msg,
1193                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1194                         return -ENOBUFS;
1195
1196                 nla_nest_end(msg, nl_rate);
1197         }
1198
1199         nla_nest_end(msg, nl_rates);
1200
1201         return 0;
1202 }
1203
1204 static int
1205 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1206                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1207 {
1208         u16 stypes;
1209         struct nlattr *nl_ftypes, *nl_ifs;
1210         enum nl80211_iftype ift;
1211         int i;
1212
1213         if (!mgmt_stypes)
1214                 return 0;
1215
1216         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1217         if (!nl_ifs)
1218                 return -ENOBUFS;
1219
1220         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1221                 nl_ftypes = nla_nest_start(msg, ift);
1222                 if (!nl_ftypes)
1223                         return -ENOBUFS;
1224                 i = 0;
1225                 stypes = mgmt_stypes[ift].tx;
1226                 while (stypes) {
1227                         if ((stypes & 1) &&
1228                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1229                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1230                                 return -ENOBUFS;
1231                         stypes >>= 1;
1232                         i++;
1233                 }
1234                 nla_nest_end(msg, nl_ftypes);
1235         }
1236
1237         nla_nest_end(msg, nl_ifs);
1238
1239         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1240         if (!nl_ifs)
1241                 return -ENOBUFS;
1242
1243         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1244                 nl_ftypes = nla_nest_start(msg, ift);
1245                 if (!nl_ftypes)
1246                         return -ENOBUFS;
1247                 i = 0;
1248                 stypes = mgmt_stypes[ift].rx;
1249                 while (stypes) {
1250                         if ((stypes & 1) &&
1251                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1252                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1253                                 return -ENOBUFS;
1254                         stypes >>= 1;
1255                         i++;
1256                 }
1257                 nla_nest_end(msg, nl_ftypes);
1258         }
1259         nla_nest_end(msg, nl_ifs);
1260
1261         return 0;
1262 }
1263
1264 struct nl80211_dump_wiphy_state {
1265         s64 filter_wiphy;
1266         long start;
1267         long split_start, band_start, chan_start;
1268         bool split;
1269 };
1270
1271 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1272                               enum nl80211_commands cmd,
1273                               struct sk_buff *msg, u32 portid, u32 seq,
1274                               int flags, struct nl80211_dump_wiphy_state *state)
1275 {
1276         void *hdr;
1277         struct nlattr *nl_bands, *nl_band;
1278         struct nlattr *nl_freqs, *nl_freq;
1279         struct nlattr *nl_cmds;
1280         enum nl80211_band band;
1281         struct ieee80211_channel *chan;
1282         int i;
1283         const struct ieee80211_txrx_stypes *mgmt_stypes =
1284                                 rdev->wiphy.mgmt_stypes;
1285         u32 features;
1286
1287         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1288         if (!hdr)
1289                 return -ENOBUFS;
1290
1291         if (WARN_ON(!state))
1292                 return -EINVAL;
1293
1294         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1295             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1296                            wiphy_name(&rdev->wiphy)) ||
1297             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1298                         cfg80211_rdev_list_generation))
1299                 goto nla_put_failure;
1300
1301         if (cmd != NL80211_CMD_NEW_WIPHY)
1302                 goto finish;
1303
1304         switch (state->split_start) {
1305         case 0:
1306                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1307                                rdev->wiphy.retry_short) ||
1308                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1309                                rdev->wiphy.retry_long) ||
1310                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1311                                 rdev->wiphy.frag_threshold) ||
1312                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1313                                 rdev->wiphy.rts_threshold) ||
1314                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1315                                rdev->wiphy.coverage_class) ||
1316                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1317                                rdev->wiphy.max_scan_ssids) ||
1318                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1319                                rdev->wiphy.max_sched_scan_ssids) ||
1320                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1321                                 rdev->wiphy.max_scan_ie_len) ||
1322                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1323                                 rdev->wiphy.max_sched_scan_ie_len) ||
1324                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1325                                rdev->wiphy.max_match_sets) ||
1326                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1327                                 rdev->wiphy.max_sched_scan_plans) ||
1328                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1329                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1330                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1331                                 rdev->wiphy.max_sched_scan_plan_iterations))
1332                         goto nla_put_failure;
1333
1334                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1335                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1336                         goto nla_put_failure;
1337                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1338                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1339                         goto nla_put_failure;
1340                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1341                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1342                         goto nla_put_failure;
1343                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1344                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1345                         goto nla_put_failure;
1346                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1347                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1348                         goto nla_put_failure;
1349                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1350                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1351                         goto nla_put_failure;
1352                 state->split_start++;
1353                 if (state->split)
1354                         break;
1355         case 1:
1356                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1357                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1358                             rdev->wiphy.cipher_suites))
1359                         goto nla_put_failure;
1360
1361                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1362                                rdev->wiphy.max_num_pmkids))
1363                         goto nla_put_failure;
1364
1365                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1366                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1367                         goto nla_put_failure;
1368
1369                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1370                                 rdev->wiphy.available_antennas_tx) ||
1371                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1372                                 rdev->wiphy.available_antennas_rx))
1373                         goto nla_put_failure;
1374
1375                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1376                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1377                                 rdev->wiphy.probe_resp_offload))
1378                         goto nla_put_failure;
1379
1380                 if ((rdev->wiphy.available_antennas_tx ||
1381                      rdev->wiphy.available_antennas_rx) &&
1382                     rdev->ops->get_antenna) {
1383                         u32 tx_ant = 0, rx_ant = 0;
1384                         int res;
1385                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1386                         if (!res) {
1387                                 if (nla_put_u32(msg,
1388                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1389                                                 tx_ant) ||
1390                                     nla_put_u32(msg,
1391                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1392                                                 rx_ant))
1393                                         goto nla_put_failure;
1394                         }
1395                 }
1396
1397                 state->split_start++;
1398                 if (state->split)
1399                         break;
1400         case 2:
1401                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1402                                         rdev->wiphy.interface_modes))
1403                                 goto nla_put_failure;
1404                 state->split_start++;
1405                 if (state->split)
1406                         break;
1407         case 3:
1408                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1409                 if (!nl_bands)
1410                         goto nla_put_failure;
1411
1412                 for (band = state->band_start;
1413                      band < NUM_NL80211_BANDS; band++) {
1414                         struct ieee80211_supported_band *sband;
1415
1416                         sband = rdev->wiphy.bands[band];
1417
1418                         if (!sband)
1419                                 continue;
1420
1421                         nl_band = nla_nest_start(msg, band);
1422                         if (!nl_band)
1423                                 goto nla_put_failure;
1424
1425                         switch (state->chan_start) {
1426                         case 0:
1427                                 if (nl80211_send_band_rateinfo(msg, sband))
1428                                         goto nla_put_failure;
1429                                 state->chan_start++;
1430                                 if (state->split)
1431                                         break;
1432                         default:
1433                                 /* add frequencies */
1434                                 nl_freqs = nla_nest_start(
1435                                         msg, NL80211_BAND_ATTR_FREQS);
1436                                 if (!nl_freqs)
1437                                         goto nla_put_failure;
1438
1439                                 for (i = state->chan_start - 1;
1440                                      i < sband->n_channels;
1441                                      i++) {
1442                                         nl_freq = nla_nest_start(msg, i);
1443                                         if (!nl_freq)
1444                                                 goto nla_put_failure;
1445
1446                                         chan = &sband->channels[i];
1447
1448                                         if (nl80211_msg_put_channel(
1449                                                         msg, chan,
1450                                                         state->split))
1451                                                 goto nla_put_failure;
1452
1453                                         nla_nest_end(msg, nl_freq);
1454                                         if (state->split)
1455                                                 break;
1456                                 }
1457                                 if (i < sband->n_channels)
1458                                         state->chan_start = i + 2;
1459                                 else
1460                                         state->chan_start = 0;
1461                                 nla_nest_end(msg, nl_freqs);
1462                         }
1463
1464                         nla_nest_end(msg, nl_band);
1465
1466                         if (state->split) {
1467                                 /* start again here */
1468                                 if (state->chan_start)
1469                                         band--;
1470                                 break;
1471                         }
1472                 }
1473                 nla_nest_end(msg, nl_bands);
1474
1475                 if (band < NUM_NL80211_BANDS)
1476                         state->band_start = band + 1;
1477                 else
1478                         state->band_start = 0;
1479
1480                 /* if bands & channels are done, continue outside */
1481                 if (state->band_start == 0 && state->chan_start == 0)
1482                         state->split_start++;
1483                 if (state->split)
1484                         break;
1485         case 4:
1486                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1487                 if (!nl_cmds)
1488                         goto nla_put_failure;
1489
1490                 i = 0;
1491 #define CMD(op, n)                                                      \
1492                  do {                                                   \
1493                         if (rdev->ops->op) {                            \
1494                                 i++;                                    \
1495                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1496                                         goto nla_put_failure;           \
1497                         }                                               \
1498                 } while (0)
1499
1500                 CMD(add_virtual_intf, NEW_INTERFACE);
1501                 CMD(change_virtual_intf, SET_INTERFACE);
1502                 CMD(add_key, NEW_KEY);
1503                 CMD(start_ap, START_AP);
1504                 CMD(add_station, NEW_STATION);
1505                 CMD(add_mpath, NEW_MPATH);
1506                 CMD(update_mesh_config, SET_MESH_CONFIG);
1507                 CMD(change_bss, SET_BSS);
1508                 CMD(auth, AUTHENTICATE);
1509                 CMD(assoc, ASSOCIATE);
1510                 CMD(deauth, DEAUTHENTICATE);
1511                 CMD(disassoc, DISASSOCIATE);
1512                 CMD(join_ibss, JOIN_IBSS);
1513                 CMD(join_mesh, JOIN_MESH);
1514                 CMD(set_pmksa, SET_PMKSA);
1515                 CMD(del_pmksa, DEL_PMKSA);
1516                 CMD(flush_pmksa, FLUSH_PMKSA);
1517                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1518                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1519                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1520                 CMD(mgmt_tx, FRAME);
1521                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1522                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1523                         i++;
1524                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1525                                 goto nla_put_failure;
1526                 }
1527                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1528                     rdev->ops->join_mesh) {
1529                         i++;
1530                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1531                                 goto nla_put_failure;
1532                 }
1533                 CMD(set_wds_peer, SET_WDS_PEER);
1534                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1535                         CMD(tdls_mgmt, TDLS_MGMT);
1536                         CMD(tdls_oper, TDLS_OPER);
1537                 }
1538                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1539                         CMD(sched_scan_start, START_SCHED_SCAN);
1540                 CMD(probe_client, PROBE_CLIENT);
1541                 CMD(set_noack_map, SET_NOACK_MAP);
1542                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1543                         i++;
1544                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1545                                 goto nla_put_failure;
1546                 }
1547                 CMD(start_p2p_device, START_P2P_DEVICE);
1548                 CMD(set_mcast_rate, SET_MCAST_RATE);
1549 #ifdef CONFIG_NL80211_TESTMODE
1550                 CMD(testmode_cmd, TESTMODE);
1551 #endif
1552                 if (state->split) {
1553                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1554                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1555                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1556                                 CMD(channel_switch, CHANNEL_SWITCH);
1557                         CMD(set_qos_map, SET_QOS_MAP);
1558                         if (rdev->wiphy.features &
1559                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1560                                 CMD(add_tx_ts, ADD_TX_TS);
1561                 }
1562                 /* add into the if now */
1563 #undef CMD
1564
1565                 if (rdev->ops->connect || rdev->ops->auth) {
1566                         i++;
1567                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1568                                 goto nla_put_failure;
1569                 }
1570
1571                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1572                         i++;
1573                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1574                                 goto nla_put_failure;
1575                 }
1576
1577                 nla_nest_end(msg, nl_cmds);
1578                 state->split_start++;
1579                 if (state->split)
1580                         break;
1581         case 5:
1582                 if (rdev->ops->remain_on_channel &&
1583                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1584                     nla_put_u32(msg,
1585                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1586                                 rdev->wiphy.max_remain_on_channel_duration))
1587                         goto nla_put_failure;
1588
1589                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1590                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1591                         goto nla_put_failure;
1592
1593                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1594                         goto nla_put_failure;
1595                 state->split_start++;
1596                 if (state->split)
1597                         break;
1598         case 6:
1599 #ifdef CONFIG_PM
1600                 if (nl80211_send_wowlan(msg, rdev, state->split))
1601                         goto nla_put_failure;
1602                 state->split_start++;
1603                 if (state->split)
1604                         break;
1605 #else
1606                 state->split_start++;
1607 #endif
1608         case 7:
1609                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1610                                         rdev->wiphy.software_iftypes))
1611                         goto nla_put_failure;
1612
1613                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1614                                                    state->split))
1615                         goto nla_put_failure;
1616
1617                 state->split_start++;
1618                 if (state->split)
1619                         break;
1620         case 8:
1621                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1622                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1623                                 rdev->wiphy.ap_sme_capa))
1624                         goto nla_put_failure;
1625
1626                 features = rdev->wiphy.features;
1627                 /*
1628                  * We can only add the per-channel limit information if the
1629                  * dump is split, otherwise it makes it too big. Therefore
1630                  * only advertise it in that case.
1631                  */
1632                 if (state->split)
1633                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1634                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1635                         goto nla_put_failure;
1636
1637                 if (rdev->wiphy.ht_capa_mod_mask &&
1638                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1639                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1640                             rdev->wiphy.ht_capa_mod_mask))
1641                         goto nla_put_failure;
1642
1643                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1644                     rdev->wiphy.max_acl_mac_addrs &&
1645                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1646                                 rdev->wiphy.max_acl_mac_addrs))
1647                         goto nla_put_failure;
1648
1649                 /*
1650                  * Any information below this point is only available to
1651                  * applications that can deal with it being split. This
1652                  * helps ensure that newly added capabilities don't break
1653                  * older tools by overrunning their buffers.
1654                  *
1655                  * We still increment split_start so that in the split
1656                  * case we'll continue with more data in the next round,
1657                  * but break unconditionally so unsplit data stops here.
1658                  */
1659                 state->split_start++;
1660                 break;
1661         case 9:
1662                 if (rdev->wiphy.extended_capabilities &&
1663                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1664                              rdev->wiphy.extended_capabilities_len,
1665                              rdev->wiphy.extended_capabilities) ||
1666                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1667                              rdev->wiphy.extended_capabilities_len,
1668                              rdev->wiphy.extended_capabilities_mask)))
1669                         goto nla_put_failure;
1670
1671                 if (rdev->wiphy.vht_capa_mod_mask &&
1672                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1673                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1674                             rdev->wiphy.vht_capa_mod_mask))
1675                         goto nla_put_failure;
1676
1677                 state->split_start++;
1678                 break;
1679         case 10:
1680                 if (nl80211_send_coalesce(msg, rdev))
1681                         goto nla_put_failure;
1682
1683                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1684                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1685                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1686                         goto nla_put_failure;
1687
1688                 if (rdev->wiphy.max_ap_assoc_sta &&
1689                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1690                                 rdev->wiphy.max_ap_assoc_sta))
1691                         goto nla_put_failure;
1692
1693                 state->split_start++;
1694                 break;
1695         case 11:
1696                 if (rdev->wiphy.n_vendor_commands) {
1697                         const struct nl80211_vendor_cmd_info *info;
1698                         struct nlattr *nested;
1699
1700                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1701                         if (!nested)
1702                                 goto nla_put_failure;
1703
1704                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1705                                 info = &rdev->wiphy.vendor_commands[i].info;
1706                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1707                                         goto nla_put_failure;
1708                         }
1709                         nla_nest_end(msg, nested);
1710                 }
1711
1712                 if (rdev->wiphy.n_vendor_events) {
1713                         const struct nl80211_vendor_cmd_info *info;
1714                         struct nlattr *nested;
1715
1716                         nested = nla_nest_start(msg,
1717                                                 NL80211_ATTR_VENDOR_EVENTS);
1718                         if (!nested)
1719                                 goto nla_put_failure;
1720
1721                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1722                                 info = &rdev->wiphy.vendor_events[i];
1723                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1724                                         goto nla_put_failure;
1725                         }
1726                         nla_nest_end(msg, nested);
1727                 }
1728                 state->split_start++;
1729                 break;
1730         case 12:
1731                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1732                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1733                                rdev->wiphy.max_num_csa_counters))
1734                         goto nla_put_failure;
1735
1736                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1737                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1738                         goto nla_put_failure;
1739
1740                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1741                             sizeof(rdev->wiphy.ext_features),
1742                             rdev->wiphy.ext_features))
1743                         goto nla_put_failure;
1744
1745                 if (rdev->wiphy.bss_select_support) {
1746                         struct nlattr *nested;
1747                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1748
1749                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1750                         if (!nested)
1751                                 goto nla_put_failure;
1752
1753                         i = 0;
1754                         while (bss_select_support) {
1755                                 if ((bss_select_support & 1) &&
1756                                     nla_put_flag(msg, i))
1757                                         goto nla_put_failure;
1758                                 i++;
1759                                 bss_select_support >>= 1;
1760                         }
1761                         nla_nest_end(msg, nested);
1762                 }
1763
1764                 /* done */
1765                 state->split_start = 0;
1766                 break;
1767         }
1768  finish:
1769         genlmsg_end(msg, hdr);
1770         return 0;
1771
1772  nla_put_failure:
1773         genlmsg_cancel(msg, hdr);
1774         return -EMSGSIZE;
1775 }
1776
1777 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1778                                     struct netlink_callback *cb,
1779                                     struct nl80211_dump_wiphy_state *state)
1780 {
1781         struct nlattr **tb = nl80211_fam.attrbuf;
1782         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1783                               tb, nl80211_fam.maxattr, nl80211_policy);
1784         /* ignore parse errors for backward compatibility */
1785         if (ret)
1786                 return 0;
1787
1788         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1789         if (tb[NL80211_ATTR_WIPHY])
1790                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1791         if (tb[NL80211_ATTR_WDEV])
1792                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1793         if (tb[NL80211_ATTR_IFINDEX]) {
1794                 struct net_device *netdev;
1795                 struct cfg80211_registered_device *rdev;
1796                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1797
1798                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1799                 if (!netdev)
1800                         return -ENODEV;
1801                 if (netdev->ieee80211_ptr) {
1802                         rdev = wiphy_to_rdev(
1803                                 netdev->ieee80211_ptr->wiphy);
1804                         state->filter_wiphy = rdev->wiphy_idx;
1805                 }
1806         }
1807
1808         return 0;
1809 }
1810
1811 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1812 {
1813         int idx = 0, ret;
1814         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1815         struct cfg80211_registered_device *rdev;
1816
1817         rtnl_lock();
1818         if (!state) {
1819                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1820                 if (!state) {
1821                         rtnl_unlock();
1822                         return -ENOMEM;
1823                 }
1824                 state->filter_wiphy = -1;
1825                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1826                 if (ret) {
1827                         kfree(state);
1828                         rtnl_unlock();
1829                         return ret;
1830                 }
1831                 cb->args[0] = (long)state;
1832         }
1833
1834         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1835                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1836                         continue;
1837                 if (++idx <= state->start)
1838                         continue;
1839                 if (state->filter_wiphy != -1 &&
1840                     state->filter_wiphy != rdev->wiphy_idx)
1841                         continue;
1842                 /* attempt to fit multiple wiphy data chunks into the skb */
1843                 do {
1844                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1845                                                  skb,
1846                                                  NETLINK_CB(cb->skb).portid,
1847                                                  cb->nlh->nlmsg_seq,
1848                                                  NLM_F_MULTI, state);
1849                         if (ret < 0) {
1850                                 /*
1851                                  * If sending the wiphy data didn't fit (ENOBUFS
1852                                  * or EMSGSIZE returned), this SKB is still
1853                                  * empty (so it's not too big because another
1854                                  * wiphy dataset is already in the skb) and
1855                                  * we've not tried to adjust the dump allocation
1856                                  * yet ... then adjust the alloc size to be
1857                                  * bigger, and return 1 but with the empty skb.
1858                                  * This results in an empty message being RX'ed
1859                                  * in userspace, but that is ignored.
1860                                  *
1861                                  * We can then retry with the larger buffer.
1862                                  */
1863                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1864                                     !skb->len && !state->split &&
1865                                     cb->min_dump_alloc < 4096) {
1866                                         cb->min_dump_alloc = 4096;
1867                                         state->split_start = 0;
1868                                         rtnl_unlock();
1869                                         return 1;
1870                                 }
1871                                 idx--;
1872                                 break;
1873                         }
1874                 } while (state->split_start > 0);
1875                 break;
1876         }
1877         rtnl_unlock();
1878
1879         state->start = idx;
1880
1881         return skb->len;
1882 }
1883
1884 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1885 {
1886         kfree((void *)cb->args[0]);
1887         return 0;
1888 }
1889
1890 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1891 {
1892         struct sk_buff *msg;
1893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1894         struct nl80211_dump_wiphy_state state = {};
1895
1896         msg = nlmsg_new(4096, GFP_KERNEL);
1897         if (!msg)
1898                 return -ENOMEM;
1899
1900         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1901                                info->snd_portid, info->snd_seq, 0,
1902                                &state) < 0) {
1903                 nlmsg_free(msg);
1904                 return -ENOBUFS;
1905         }
1906
1907         return genlmsg_reply(msg, info);
1908 }
1909
1910 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1911         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1912         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1913         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1914         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1915         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1916 };
1917
1918 static int parse_txq_params(struct nlattr *tb[],
1919                             struct ieee80211_txq_params *txq_params)
1920 {
1921         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1922             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1923             !tb[NL80211_TXQ_ATTR_AIFS])
1924                 return -EINVAL;
1925
1926         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1927         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1928         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1929         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1930         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1931
1932         if (txq_params->ac >= NL80211_NUM_ACS)
1933                 return -EINVAL;
1934
1935         return 0;
1936 }
1937
1938 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1939 {
1940         /*
1941          * You can only set the channel explicitly for WDS interfaces,
1942          * all others have their channel managed via their respective
1943          * "establish a connection" command (connect, join, ...)
1944          *
1945          * For AP/GO and mesh mode, the channel can be set with the
1946          * channel userspace API, but is only stored and passed to the
1947          * low-level driver when the AP starts or the mesh is joined.
1948          * This is for backward compatibility, userspace can also give
1949          * the channel in the start-ap or join-mesh commands instead.
1950          *
1951          * Monitors are special as they are normally slaved to
1952          * whatever else is going on, so they have their own special
1953          * operation to set the monitor channel if possible.
1954          */
1955         return !wdev ||
1956                 wdev->iftype == NL80211_IFTYPE_AP ||
1957                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1958                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1959                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1960 }
1961
1962 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1963                                  struct genl_info *info,
1964                                  struct cfg80211_chan_def *chandef)
1965 {
1966         u32 control_freq;
1967
1968         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1969                 return -EINVAL;
1970
1971         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1972
1973         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1974         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1975         chandef->center_freq1 = control_freq;
1976         chandef->center_freq2 = 0;
1977
1978         /* Primary channel not allowed */
1979         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1980                 return -EINVAL;
1981
1982         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1983                 enum nl80211_channel_type chantype;
1984
1985                 chantype = nla_get_u32(
1986                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1987
1988                 switch (chantype) {
1989                 case NL80211_CHAN_NO_HT:
1990                 case NL80211_CHAN_HT20:
1991                 case NL80211_CHAN_HT40PLUS:
1992                 case NL80211_CHAN_HT40MINUS:
1993                         cfg80211_chandef_create(chandef, chandef->chan,
1994                                                 chantype);
1995                         break;
1996                 default:
1997                         return -EINVAL;
1998                 }
1999         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2000                 chandef->width =
2001                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2002                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2003                         chandef->center_freq1 =
2004                                 nla_get_u32(
2005                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2006                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2007                         chandef->center_freq2 =
2008                                 nla_get_u32(
2009                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2010         }
2011
2012         if (!cfg80211_chandef_valid(chandef))
2013                 return -EINVAL;
2014
2015         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2016                                      IEEE80211_CHAN_DISABLED))
2017                 return -EINVAL;
2018
2019         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2020              chandef->width == NL80211_CHAN_WIDTH_10) &&
2021             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2022                 return -EINVAL;
2023
2024         return 0;
2025 }
2026
2027 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2028                                  struct net_device *dev,
2029                                  struct genl_info *info)
2030 {
2031         struct cfg80211_chan_def chandef;
2032         int result;
2033         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2034         struct wireless_dev *wdev = NULL;
2035
2036         if (dev)
2037                 wdev = dev->ieee80211_ptr;
2038         if (!nl80211_can_set_dev_channel(wdev))
2039                 return -EOPNOTSUPP;
2040         if (wdev)
2041                 iftype = wdev->iftype;
2042
2043         result = nl80211_parse_chandef(rdev, info, &chandef);
2044         if (result)
2045                 return result;
2046
2047         switch (iftype) {
2048         case NL80211_IFTYPE_AP:
2049         case NL80211_IFTYPE_P2P_GO:
2050                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2051                                                    iftype)) {
2052                         result = -EINVAL;
2053                         break;
2054                 }
2055                 if (wdev->beacon_interval) {
2056                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2057                             !(rdev->wiphy.features &
2058                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2059                                 result = -EBUSY;
2060                                 break;
2061                         }
2062
2063                         /* Only allow dynamic channel width changes */
2064                         if (chandef.chan != wdev->preset_chandef.chan) {
2065                                 result = -EBUSY;
2066                                 break;
2067                         }
2068                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2069                         if (result)
2070                                 break;
2071                 }
2072                 wdev->preset_chandef = chandef;
2073                 result = 0;
2074                 break;
2075         case NL80211_IFTYPE_MESH_POINT:
2076                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2077                 break;
2078         case NL80211_IFTYPE_MONITOR:
2079                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2080                 break;
2081         default:
2082                 result = -EINVAL;
2083         }
2084
2085         return result;
2086 }
2087
2088 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2089 {
2090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2091         struct net_device *netdev = info->user_ptr[1];
2092
2093         return __nl80211_set_channel(rdev, netdev, info);
2094 }
2095
2096 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2097 {
2098         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2099         struct net_device *dev = info->user_ptr[1];
2100         struct wireless_dev *wdev = dev->ieee80211_ptr;
2101         const u8 *bssid;
2102
2103         if (!info->attrs[NL80211_ATTR_MAC])
2104                 return -EINVAL;
2105
2106         if (netif_running(dev))
2107                 return -EBUSY;
2108
2109         if (!rdev->ops->set_wds_peer)
2110                 return -EOPNOTSUPP;
2111
2112         if (wdev->iftype != NL80211_IFTYPE_WDS)
2113                 return -EOPNOTSUPP;
2114
2115         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2116         return rdev_set_wds_peer(rdev, dev, bssid);
2117 }
2118
2119
2120 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2121 {
2122         struct cfg80211_registered_device *rdev;
2123         struct net_device *netdev = NULL;
2124         struct wireless_dev *wdev;
2125         int result = 0, rem_txq_params = 0;
2126         struct nlattr *nl_txq_params;
2127         u32 changed;
2128         u8 retry_short = 0, retry_long = 0;
2129         u32 frag_threshold = 0, rts_threshold = 0;
2130         u8 coverage_class = 0;
2131
2132         ASSERT_RTNL();
2133
2134         /*
2135          * Try to find the wiphy and netdev. Normally this
2136          * function shouldn't need the netdev, but this is
2137          * done for backward compatibility -- previously
2138          * setting the channel was done per wiphy, but now
2139          * it is per netdev. Previous userland like hostapd
2140          * also passed a netdev to set_wiphy, so that it is
2141          * possible to let that go to the right netdev!
2142          */
2143
2144         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2145                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2146
2147                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2148                 if (netdev && netdev->ieee80211_ptr)
2149                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2150                 else
2151                         netdev = NULL;
2152         }
2153
2154         if (!netdev) {
2155                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2156                                                   info->attrs);
2157                 if (IS_ERR(rdev))
2158                         return PTR_ERR(rdev);
2159                 wdev = NULL;
2160                 netdev = NULL;
2161                 result = 0;
2162         } else
2163                 wdev = netdev->ieee80211_ptr;
2164
2165         /*
2166          * end workaround code, by now the rdev is available
2167          * and locked, and wdev may or may not be NULL.
2168          */
2169
2170         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2171                 result = cfg80211_dev_rename(
2172                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2173
2174         if (result)
2175                 return result;
2176
2177         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2178                 struct ieee80211_txq_params txq_params;
2179                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2180
2181                 if (!rdev->ops->set_txq_params)
2182                         return -EOPNOTSUPP;
2183
2184                 if (!netdev)
2185                         return -EINVAL;
2186
2187                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2188                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2189                         return -EINVAL;
2190
2191                 if (!netif_running(netdev))
2192                         return -ENETDOWN;
2193
2194                 nla_for_each_nested(nl_txq_params,
2195                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2196                                     rem_txq_params) {
2197                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2198                                            nla_data(nl_txq_params),
2199                                            nla_len(nl_txq_params),
2200                                            txq_params_policy);
2201                         if (result)
2202                                 return result;
2203                         result = parse_txq_params(tb, &txq_params);
2204                         if (result)
2205                                 return result;
2206
2207                         result = rdev_set_txq_params(rdev, netdev,
2208                                                      &txq_params);
2209                         if (result)
2210                                 return result;
2211                 }
2212         }
2213
2214         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2215                 result = __nl80211_set_channel(
2216                         rdev,
2217                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2218                         info);
2219                 if (result)
2220                         return result;
2221         }
2222
2223         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2224                 struct wireless_dev *txp_wdev = wdev;
2225                 enum nl80211_tx_power_setting type;
2226                 int idx, mbm = 0;
2227
2228                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2229                         txp_wdev = NULL;
2230
2231                 if (!rdev->ops->set_tx_power)
2232                         return -EOPNOTSUPP;
2233
2234                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2235                 type = nla_get_u32(info->attrs[idx]);
2236
2237                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2238                     (type != NL80211_TX_POWER_AUTOMATIC))
2239                         return -EINVAL;
2240
2241                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2242                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2243                         mbm = nla_get_u32(info->attrs[idx]);
2244                 }
2245
2246                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2247                 if (result)
2248                         return result;
2249         }
2250
2251         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2252             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2253                 u32 tx_ant, rx_ant;
2254                 if ((!rdev->wiphy.available_antennas_tx &&
2255                      !rdev->wiphy.available_antennas_rx) ||
2256                     !rdev->ops->set_antenna)
2257                         return -EOPNOTSUPP;
2258
2259                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2260                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2261
2262                 /* reject antenna configurations which don't match the
2263                  * available antenna masks, except for the "all" mask */
2264                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2265                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2266                         return -EINVAL;
2267
2268                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2269                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2270
2271                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2272                 if (result)
2273                         return result;
2274         }
2275
2276         changed = 0;
2277
2278         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2279                 retry_short = nla_get_u8(
2280                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2281                 if (retry_short == 0)
2282                         return -EINVAL;
2283
2284                 changed |= WIPHY_PARAM_RETRY_SHORT;
2285         }
2286
2287         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2288                 retry_long = nla_get_u8(
2289                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2290                 if (retry_long == 0)
2291                         return -EINVAL;
2292
2293                 changed |= WIPHY_PARAM_RETRY_LONG;
2294         }
2295
2296         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2297                 frag_threshold = nla_get_u32(
2298                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2299                 if (frag_threshold < 256)
2300                         return -EINVAL;
2301
2302                 if (frag_threshold != (u32) -1) {
2303                         /*
2304                          * Fragments (apart from the last one) are required to
2305                          * have even length. Make the fragmentation code
2306                          * simpler by stripping LSB should someone try to use
2307                          * odd threshold value.
2308                          */
2309                         frag_threshold &= ~0x1;
2310                 }
2311                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2312         }
2313
2314         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2315                 rts_threshold = nla_get_u32(
2316                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2317                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2318         }
2319
2320         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2321                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2322                         return -EINVAL;
2323
2324                 coverage_class = nla_get_u8(
2325                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2326                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2327         }
2328
2329         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2330                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2331                         return -EOPNOTSUPP;
2332
2333                 changed |= WIPHY_PARAM_DYN_ACK;
2334         }
2335
2336         if (changed) {
2337                 u8 old_retry_short, old_retry_long;
2338                 u32 old_frag_threshold, old_rts_threshold;
2339                 u8 old_coverage_class;
2340
2341                 if (!rdev->ops->set_wiphy_params)
2342                         return -EOPNOTSUPP;
2343
2344                 old_retry_short = rdev->wiphy.retry_short;
2345                 old_retry_long = rdev->wiphy.retry_long;
2346                 old_frag_threshold = rdev->wiphy.frag_threshold;
2347                 old_rts_threshold = rdev->wiphy.rts_threshold;
2348                 old_coverage_class = rdev->wiphy.coverage_class;
2349
2350                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2351                         rdev->wiphy.retry_short = retry_short;
2352                 if (changed & WIPHY_PARAM_RETRY_LONG)
2353                         rdev->wiphy.retry_long = retry_long;
2354                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2355                         rdev->wiphy.frag_threshold = frag_threshold;
2356                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2357                         rdev->wiphy.rts_threshold = rts_threshold;
2358                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2359                         rdev->wiphy.coverage_class = coverage_class;
2360
2361                 result = rdev_set_wiphy_params(rdev, changed);
2362                 if (result) {
2363                         rdev->wiphy.retry_short = old_retry_short;
2364                         rdev->wiphy.retry_long = old_retry_long;
2365                         rdev->wiphy.frag_threshold = old_frag_threshold;
2366                         rdev->wiphy.rts_threshold = old_rts_threshold;
2367                         rdev->wiphy.coverage_class = old_coverage_class;
2368                         return result;
2369                 }
2370         }
2371         return 0;
2372 }
2373
2374 static inline u64 wdev_id(struct wireless_dev *wdev)
2375 {
2376         return (u64)wdev->identifier |
2377                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2378 }
2379
2380 static int nl80211_send_chandef(struct sk_buff *msg,
2381                                 const struct cfg80211_chan_def *chandef)
2382 {
2383         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2384                 return -EINVAL;
2385
2386         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2387                         chandef->chan->center_freq))
2388                 return -ENOBUFS;
2389         switch (chandef->width) {
2390         case NL80211_CHAN_WIDTH_20_NOHT:
2391         case NL80211_CHAN_WIDTH_20:
2392         case NL80211_CHAN_WIDTH_40:
2393                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2394                                 cfg80211_get_chandef_type(chandef)))
2395                         return -ENOBUFS;
2396                 break;
2397         default:
2398                 break;
2399         }
2400         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2401                 return -ENOBUFS;
2402         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2403                 return -ENOBUFS;
2404         if (chandef->center_freq2 &&
2405             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2406                 return -ENOBUFS;
2407         return 0;
2408 }
2409
2410 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2411                               struct cfg80211_registered_device *rdev,
2412                               struct wireless_dev *wdev, bool removal)
2413 {
2414         struct net_device *dev = wdev->netdev;
2415         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2416         void *hdr;
2417
2418         if (removal)
2419                 cmd = NL80211_CMD_DEL_INTERFACE;
2420
2421         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2422         if (!hdr)
2423                 return -1;
2424
2425         if (dev &&
2426             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2427              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2428                 goto nla_put_failure;
2429
2430         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2431             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2432             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2433                               NL80211_ATTR_PAD) ||
2434             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2435             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2436                         rdev->devlist_generation ^
2437                         (cfg80211_rdev_list_generation << 2)))
2438                 goto nla_put_failure;
2439
2440         if (rdev->ops->get_channel) {
2441                 int ret;
2442                 struct cfg80211_chan_def chandef;
2443
2444                 ret = rdev_get_channel(rdev, wdev, &chandef);
2445                 if (ret == 0) {
2446                         if (nl80211_send_chandef(msg, &chandef))
2447                                 goto nla_put_failure;
2448                 }
2449         }
2450
2451         if (rdev->ops->get_tx_power) {
2452                 int dbm, ret;
2453
2454                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2455                 if (ret == 0 &&
2456                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2457                                 DBM_TO_MBM(dbm)))
2458                         goto nla_put_failure;
2459         }
2460
2461         if (wdev->ssid_len) {
2462                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2463                         goto nla_put_failure;
2464         }
2465
2466         genlmsg_end(msg, hdr);
2467         return 0;
2468
2469  nla_put_failure:
2470         genlmsg_cancel(msg, hdr);
2471         return -EMSGSIZE;
2472 }
2473
2474 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2475 {
2476         int wp_idx = 0;
2477         int if_idx = 0;
2478         int wp_start = cb->args[0];
2479         int if_start = cb->args[1];
2480         struct cfg80211_registered_device *rdev;
2481         struct wireless_dev *wdev;
2482
2483         rtnl_lock();
2484         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2485                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2486                         continue;
2487                 if (wp_idx < wp_start) {
2488                         wp_idx++;
2489                         continue;
2490                 }
2491                 if_idx = 0;
2492
2493                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2494                         if (if_idx < if_start) {
2495                                 if_idx++;
2496                                 continue;
2497                         }
2498                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2499                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2500                                                rdev, wdev, false) < 0) {
2501                                 goto out;
2502                         }
2503                         if_idx++;
2504                 }
2505
2506                 wp_idx++;
2507         }
2508  out:
2509         rtnl_unlock();
2510
2511         cb->args[0] = wp_idx;
2512         cb->args[1] = if_idx;
2513
2514         return skb->len;
2515 }
2516
2517 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2518 {
2519         struct sk_buff *msg;
2520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2521         struct wireless_dev *wdev = info->user_ptr[1];
2522
2523         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2524         if (!msg)
2525                 return -ENOMEM;
2526
2527         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2528                                rdev, wdev, false) < 0) {
2529                 nlmsg_free(msg);
2530                 return -ENOBUFS;
2531         }
2532
2533         return genlmsg_reply(msg, info);
2534 }
2535
2536 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2537         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2538         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2539         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2540         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2541         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2542         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2543 };
2544
2545 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2546 {
2547         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2548         int flag;
2549
2550         *mntrflags = 0;
2551
2552         if (!nla)
2553                 return -EINVAL;
2554
2555         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2556                              nla, mntr_flags_policy))
2557                 return -EINVAL;
2558
2559         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2560                 if (flags[flag])
2561                         *mntrflags |= (1<<flag);
2562
2563         return 0;
2564 }
2565
2566 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2567                                struct net_device *netdev, u8 use_4addr,
2568                                enum nl80211_iftype iftype)
2569 {
2570         if (!use_4addr) {
2571                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2572                         return -EBUSY;
2573                 return 0;
2574         }
2575
2576         switch (iftype) {
2577         case NL80211_IFTYPE_AP_VLAN:
2578                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2579                         return 0;
2580                 break;
2581         case NL80211_IFTYPE_STATION:
2582                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2583                         return 0;
2584                 break;
2585         default:
2586                 break;
2587         }
2588
2589         return -EOPNOTSUPP;
2590 }
2591
2592 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2593 {
2594         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2595         struct vif_params params;
2596         int err;
2597         enum nl80211_iftype otype, ntype;
2598         struct net_device *dev = info->user_ptr[1];
2599         u32 _flags, *flags = NULL;
2600         bool change = false;
2601
2602         memset(&params, 0, sizeof(params));
2603
2604         otype = ntype = dev->ieee80211_ptr->iftype;
2605
2606         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2607                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2608                 if (otype != ntype)
2609                         change = true;
2610                 if (ntype > NL80211_IFTYPE_MAX)
2611                         return -EINVAL;
2612         }
2613
2614         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2615                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2616
2617                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2618                         return -EINVAL;
2619                 if (netif_running(dev))
2620                         return -EBUSY;
2621
2622                 wdev_lock(wdev);
2623                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2624                              IEEE80211_MAX_MESH_ID_LEN);
2625                 wdev->mesh_id_up_len =
2626                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2627                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2628                        wdev->mesh_id_up_len);
2629                 wdev_unlock(wdev);
2630         }
2631
2632         if (info->attrs[NL80211_ATTR_4ADDR]) {
2633                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2634                 change = true;
2635                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2636                 if (err)
2637                         return err;
2638         } else {
2639                 params.use_4addr = -1;
2640         }
2641
2642         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2643                 if (ntype != NL80211_IFTYPE_MONITOR)
2644                         return -EINVAL;
2645                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2646                                           &_flags);
2647                 if (err)
2648                         return err;
2649
2650                 flags = &_flags;
2651                 change = true;
2652         }
2653
2654         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2655             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2656                 return -EOPNOTSUPP;
2657
2658         if (change)
2659                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2660         else
2661                 err = 0;
2662
2663         if (!err && params.use_4addr != -1)
2664                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2665
2666         return err;
2667 }
2668
2669 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2670 {
2671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2672         struct vif_params params;
2673         struct wireless_dev *wdev;
2674         struct sk_buff *msg, *event;
2675         int err;
2676         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2677         u32 flags;
2678
2679         /* to avoid failing a new interface creation due to pending removal */
2680         cfg80211_destroy_ifaces(rdev);
2681
2682         memset(&params, 0, sizeof(params));
2683
2684         if (!info->attrs[NL80211_ATTR_IFNAME])
2685                 return -EINVAL;
2686
2687         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2688                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2689                 if (type > NL80211_IFTYPE_MAX)
2690                         return -EINVAL;
2691         }
2692
2693         if (!rdev->ops->add_virtual_intf ||
2694             !(rdev->wiphy.interface_modes & (1 << type)))
2695                 return -EOPNOTSUPP;
2696
2697         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2698              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2699             info->attrs[NL80211_ATTR_MAC]) {
2700                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2701                            ETH_ALEN);
2702                 if (!is_valid_ether_addr(params.macaddr))
2703                         return -EADDRNOTAVAIL;
2704         }
2705
2706         if (info->attrs[NL80211_ATTR_4ADDR]) {
2707                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2708                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2709                 if (err)
2710                         return err;
2711         }
2712
2713         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2714                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2715                                   &flags);
2716
2717         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2718             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2719                 return -EOPNOTSUPP;
2720
2721         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2722         if (!msg)
2723                 return -ENOMEM;
2724
2725         wdev = rdev_add_virtual_intf(rdev,
2726                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2727                                 NET_NAME_USER, type, err ? NULL : &flags,
2728                                 &params);
2729         if (WARN_ON(!wdev)) {
2730                 nlmsg_free(msg);
2731                 return -EPROTO;
2732         } else if (IS_ERR(wdev)) {
2733                 nlmsg_free(msg);
2734                 return PTR_ERR(wdev);
2735         }
2736
2737         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2738                 wdev->owner_nlportid = info->snd_portid;
2739
2740         switch (type) {
2741         case NL80211_IFTYPE_MESH_POINT:
2742                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2743                         break;
2744                 wdev_lock(wdev);
2745                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2746                              IEEE80211_MAX_MESH_ID_LEN);
2747                 wdev->mesh_id_up_len =
2748                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2749                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2750                        wdev->mesh_id_up_len);
2751                 wdev_unlock(wdev);
2752                 break;
2753         case NL80211_IFTYPE_P2P_DEVICE:
2754                 /*
2755                  * P2P Device doesn't have a netdev, so doesn't go
2756                  * through the netdev notifier and must be added here
2757                  */
2758                 mutex_init(&wdev->mtx);
2759                 INIT_LIST_HEAD(&wdev->event_list);
2760                 spin_lock_init(&wdev->event_lock);
2761                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2762                 spin_lock_init(&wdev->mgmt_registrations_lock);
2763
2764                 wdev->identifier = ++rdev->wdev_id;
2765                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2766                 rdev->devlist_generation++;
2767                 break;
2768         default:
2769                 break;
2770         }
2771
2772         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2773                                rdev, wdev, false) < 0) {
2774                 nlmsg_free(msg);
2775                 return -ENOBUFS;
2776         }
2777
2778         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2779         if (event) {
2780                 if (nl80211_send_iface(event, 0, 0, 0,
2781                                        rdev, wdev, false) < 0) {
2782                         nlmsg_free(event);
2783                         goto out;
2784                 }
2785
2786                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2787                                         event, 0, NL80211_MCGRP_CONFIG,
2788                                         GFP_KERNEL);
2789         }
2790
2791 out:
2792         return genlmsg_reply(msg, info);
2793 }
2794
2795 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2796 {
2797         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2798         struct wireless_dev *wdev = info->user_ptr[1];
2799         struct sk_buff *msg;
2800         int status;
2801
2802         if (!rdev->ops->del_virtual_intf)
2803                 return -EOPNOTSUPP;
2804
2805         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2806         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2807                 nlmsg_free(msg);
2808                 msg = NULL;
2809         }
2810
2811         /*
2812          * If we remove a wireless device without a netdev then clear
2813          * user_ptr[1] so that nl80211_post_doit won't dereference it
2814          * to check if it needs to do dev_put(). Otherwise it crashes
2815          * since the wdev has been freed, unlike with a netdev where
2816          * we need the dev_put() for the netdev to really be freed.
2817          */
2818         if (!wdev->netdev)
2819                 info->user_ptr[1] = NULL;
2820
2821         status = rdev_del_virtual_intf(rdev, wdev);
2822         if (status >= 0 && msg)
2823                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2824                                         msg, 0, NL80211_MCGRP_CONFIG,
2825                                         GFP_KERNEL);
2826         else
2827                 nlmsg_free(msg);
2828
2829         return status;
2830 }
2831
2832 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2833 {
2834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2835         struct net_device *dev = info->user_ptr[1];
2836         u16 noack_map;
2837
2838         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2839                 return -EINVAL;
2840
2841         if (!rdev->ops->set_noack_map)
2842                 return -EOPNOTSUPP;
2843
2844         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2845
2846         return rdev_set_noack_map(rdev, dev, noack_map);
2847 }
2848
2849 struct get_key_cookie {
2850         struct sk_buff *msg;
2851         int error;
2852         int idx;
2853 };
2854
2855 static void get_key_callback(void *c, struct key_params *params)
2856 {
2857         struct nlattr *key;
2858         struct get_key_cookie *cookie = c;
2859
2860         if ((params->key &&
2861              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2862                      params->key_len, params->key)) ||
2863             (params->seq &&
2864              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2865                      params->seq_len, params->seq)) ||
2866             (params->cipher &&
2867              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2868                          params->cipher)))
2869                 goto nla_put_failure;
2870
2871         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2872         if (!key)
2873                 goto nla_put_failure;
2874
2875         if ((params->key &&
2876              nla_put(cookie->msg, NL80211_KEY_DATA,
2877                      params->key_len, params->key)) ||
2878             (params->seq &&
2879              nla_put(cookie->msg, NL80211_KEY_SEQ,
2880                      params->seq_len, params->seq)) ||
2881             (params->cipher &&
2882              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2883                          params->cipher)))
2884                 goto nla_put_failure;
2885
2886         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2887                 goto nla_put_failure;
2888
2889         nla_nest_end(cookie->msg, key);
2890
2891         return;
2892  nla_put_failure:
2893         cookie->error = 1;
2894 }
2895
2896 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2897 {
2898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2899         int err;
2900         struct net_device *dev = info->user_ptr[1];
2901         u8 key_idx = 0;
2902         const u8 *mac_addr = NULL;
2903         bool pairwise;
2904         struct get_key_cookie cookie = {
2905                 .error = 0,
2906         };
2907         void *hdr;
2908         struct sk_buff *msg;
2909
2910         if (info->attrs[NL80211_ATTR_KEY_IDX])
2911                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2912
2913         if (key_idx > 5)
2914                 return -EINVAL;
2915
2916         if (info->attrs[NL80211_ATTR_MAC])
2917                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2918
2919         pairwise = !!mac_addr;
2920         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2921                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2922                 if (kt >= NUM_NL80211_KEYTYPES)
2923                         return -EINVAL;
2924                 if (kt != NL80211_KEYTYPE_GROUP &&
2925                     kt != NL80211_KEYTYPE_PAIRWISE)
2926                         return -EINVAL;
2927                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2928         }
2929
2930         if (!rdev->ops->get_key)
2931                 return -EOPNOTSUPP;
2932
2933         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2934                 return -ENOENT;
2935
2936         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2937         if (!msg)
2938                 return -ENOMEM;
2939
2940         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2941                              NL80211_CMD_NEW_KEY);
2942         if (!hdr)
2943                 goto nla_put_failure;
2944
2945         cookie.msg = msg;
2946         cookie.idx = key_idx;
2947
2948         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2949             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2950                 goto nla_put_failure;
2951         if (mac_addr &&
2952             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2953                 goto nla_put_failure;
2954
2955         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2956                            get_key_callback);
2957
2958         if (err)
2959                 goto free_msg;
2960
2961         if (cookie.error)
2962                 goto nla_put_failure;
2963
2964         genlmsg_end(msg, hdr);
2965         return genlmsg_reply(msg, info);
2966
2967  nla_put_failure:
2968         err = -ENOBUFS;
2969  free_msg:
2970         nlmsg_free(msg);
2971         return err;
2972 }
2973
2974 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2975 {
2976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2977         struct key_parse key;
2978         int err;
2979         struct net_device *dev = info->user_ptr[1];
2980
2981         err = nl80211_parse_key(info, &key);
2982         if (err)
2983                 return err;
2984
2985         if (key.idx < 0)
2986                 return -EINVAL;
2987
2988         /* only support setting default key */
2989         if (!key.def && !key.defmgmt)
2990                 return -EINVAL;
2991
2992         wdev_lock(dev->ieee80211_ptr);
2993
2994         if (key.def) {
2995                 if (!rdev->ops->set_default_key) {
2996                         err = -EOPNOTSUPP;
2997                         goto out;
2998                 }
2999
3000                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3001                 if (err)
3002                         goto out;
3003
3004                 err = rdev_set_default_key(rdev, dev, key.idx,
3005                                                  key.def_uni, key.def_multi);
3006
3007                 if (err)
3008                         goto out;
3009
3010 #ifdef CONFIG_CFG80211_WEXT
3011                 dev->ieee80211_ptr->wext.default_key = key.idx;
3012 #endif
3013         } else {
3014                 if (key.def_uni || !key.def_multi) {
3015                         err = -EINVAL;
3016                         goto out;
3017                 }
3018
3019                 if (!rdev->ops->set_default_mgmt_key) {
3020                         err = -EOPNOTSUPP;
3021                         goto out;
3022                 }
3023
3024                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3025                 if (err)
3026                         goto out;
3027
3028                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3029                 if (err)
3030                         goto out;
3031
3032 #ifdef CONFIG_CFG80211_WEXT
3033                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3034 #endif
3035         }
3036
3037  out:
3038         wdev_unlock(dev->ieee80211_ptr);
3039
3040         return err;
3041 }
3042
3043 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3044 {
3045         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3046         int err;
3047         struct net_device *dev = info->user_ptr[1];
3048         struct key_parse key;
3049         const u8 *mac_addr = NULL;
3050
3051         err = nl80211_parse_key(info, &key);
3052         if (err)
3053                 return err;
3054
3055         if (!key.p.key)
3056                 return -EINVAL;
3057
3058         if (info->attrs[NL80211_ATTR_MAC])
3059                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3060
3061         if (key.type == -1) {
3062                 if (mac_addr)
3063                         key.type = NL80211_KEYTYPE_PAIRWISE;
3064                 else
3065                         key.type = NL80211_KEYTYPE_GROUP;
3066         }
3067
3068         /* for now */
3069         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3070             key.type != NL80211_KEYTYPE_GROUP)
3071                 return -EINVAL;
3072
3073         if (!rdev->ops->add_key)
3074                 return -EOPNOTSUPP;
3075
3076         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3077                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3078                                            mac_addr))
3079                 return -EINVAL;
3080
3081         wdev_lock(dev->ieee80211_ptr);
3082         err = nl80211_key_allowed(dev->ieee80211_ptr);
3083         if (!err)
3084                 err = rdev_add_key(rdev, dev, key.idx,
3085                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3086                                     mac_addr, &key.p);
3087         wdev_unlock(dev->ieee80211_ptr);
3088
3089         return err;
3090 }
3091
3092 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3093 {
3094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3095         int err;
3096         struct net_device *dev = info->user_ptr[1];
3097         u8 *mac_addr = NULL;
3098         struct key_parse key;
3099
3100         err = nl80211_parse_key(info, &key);
3101         if (err)
3102                 return err;
3103
3104         if (info->attrs[NL80211_ATTR_MAC])
3105                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3106
3107         if (key.type == -1) {
3108                 if (mac_addr)
3109                         key.type = NL80211_KEYTYPE_PAIRWISE;
3110                 else
3111                         key.type = NL80211_KEYTYPE_GROUP;
3112         }
3113
3114         /* for now */
3115         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3116             key.type != NL80211_KEYTYPE_GROUP)
3117                 return -EINVAL;
3118
3119         if (!rdev->ops->del_key)
3120                 return -EOPNOTSUPP;
3121
3122         wdev_lock(dev->ieee80211_ptr);
3123         err = nl80211_key_allowed(dev->ieee80211_ptr);
3124
3125         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3126             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3127                 err = -ENOENT;
3128
3129         if (!err)
3130                 err = rdev_del_key(rdev, dev, key.idx,
3131                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3132                                    mac_addr);
3133
3134 #ifdef CONFIG_CFG80211_WEXT
3135         if (!err) {
3136                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3137                         dev->ieee80211_ptr->wext.default_key = -1;
3138                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3139                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3140         }
3141 #endif
3142         wdev_unlock(dev->ieee80211_ptr);
3143
3144         return err;
3145 }
3146
3147 /* This function returns an error or the number of nested attributes */
3148 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3149 {
3150         struct nlattr *attr;
3151         int n_entries = 0, tmp;
3152
3153         nla_for_each_nested(attr, nl_attr, tmp) {
3154                 if (nla_len(attr) != ETH_ALEN)
3155                         return -EINVAL;
3156
3157                 n_entries++;
3158         }
3159
3160         return n_entries;
3161 }
3162
3163 /*
3164  * This function parses ACL information and allocates memory for ACL data.
3165  * On successful return, the calling function is responsible to free the
3166  * ACL buffer returned by this function.
3167  */
3168 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3169                                                 struct genl_info *info)
3170 {
3171         enum nl80211_acl_policy acl_policy;
3172         struct nlattr *attr;
3173         struct cfg80211_acl_data *acl;
3174         int i = 0, n_entries, tmp;
3175
3176         if (!wiphy->max_acl_mac_addrs)
3177                 return ERR_PTR(-EOPNOTSUPP);
3178
3179         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3180                 return ERR_PTR(-EINVAL);
3181
3182         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3183         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3184             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3185                 return ERR_PTR(-EINVAL);
3186
3187         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3188                 return ERR_PTR(-EINVAL);
3189
3190         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3191         if (n_entries < 0)
3192                 return ERR_PTR(n_entries);
3193
3194         if (n_entries > wiphy->max_acl_mac_addrs)
3195                 return ERR_PTR(-ENOTSUPP);
3196
3197         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3198                       GFP_KERNEL);
3199         if (!acl)
3200                 return ERR_PTR(-ENOMEM);
3201
3202         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3203                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3204                 i++;
3205         }
3206
3207         acl->n_acl_entries = n_entries;
3208         acl->acl_policy = acl_policy;
3209
3210         return acl;
3211 }
3212
3213 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3214 {
3215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3216         struct net_device *dev = info->user_ptr[1];
3217         struct cfg80211_acl_data *acl;
3218         int err;
3219
3220         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3221             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3222                 return -EOPNOTSUPP;
3223
3224         if (!dev->ieee80211_ptr->beacon_interval)
3225                 return -EINVAL;
3226
3227         acl = parse_acl_data(&rdev->wiphy, info);
3228         if (IS_ERR(acl))
3229                 return PTR_ERR(acl);
3230
3231         err = rdev_set_mac_acl(rdev, dev, acl);
3232
3233         kfree(acl);
3234
3235         return err;
3236 }
3237
3238 static int nl80211_parse_beacon(struct nlattr *attrs[],
3239                                 struct cfg80211_beacon_data *bcn)
3240 {
3241         bool haveinfo = false;
3242
3243         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3244             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3245             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3246             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3247                 return -EINVAL;
3248
3249         memset(bcn, 0, sizeof(*bcn));
3250
3251         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3252                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3253                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3254                 if (!bcn->head_len)
3255                         return -EINVAL;
3256                 haveinfo = true;
3257         }
3258
3259         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3260                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3261                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3262                 haveinfo = true;
3263         }
3264
3265         if (!haveinfo)
3266                 return -EINVAL;
3267
3268         if (attrs[NL80211_ATTR_IE]) {
3269                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3270                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3271         }
3272
3273         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3274                 bcn->proberesp_ies =
3275                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3276                 bcn->proberesp_ies_len =
3277                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3278         }
3279
3280         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3281                 bcn->assocresp_ies =
3282                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3283                 bcn->assocresp_ies_len =
3284                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3285         }
3286
3287         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3288                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3289                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3290         }
3291
3292         return 0;
3293 }
3294
3295 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3296                                    struct cfg80211_ap_settings *params)
3297 {
3298         struct wireless_dev *wdev;
3299         bool ret = false;
3300
3301         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3302                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3303                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3304                         continue;
3305
3306                 if (!wdev->preset_chandef.chan)
3307                         continue;
3308
3309                 params->chandef = wdev->preset_chandef;
3310                 ret = true;
3311                 break;
3312         }
3313
3314         return ret;
3315 }
3316
3317 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3318                                     enum nl80211_auth_type auth_type,
3319                                     enum nl80211_commands cmd)
3320 {
3321         if (auth_type > NL80211_AUTHTYPE_MAX)
3322                 return false;
3323
3324         switch (cmd) {
3325         case NL80211_CMD_AUTHENTICATE:
3326                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3327                     auth_type == NL80211_AUTHTYPE_SAE)
3328                         return false;
3329                 return true;
3330         case NL80211_CMD_CONNECT:
3331         case NL80211_CMD_START_AP:
3332                 /* SAE not supported yet */
3333                 if (auth_type == NL80211_AUTHTYPE_SAE)
3334                         return false;
3335                 return true;
3336         default:
3337                 return false;
3338         }
3339 }
3340
3341 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3342 {
3343         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3344         struct net_device *dev = info->user_ptr[1];
3345         struct wireless_dev *wdev = dev->ieee80211_ptr;
3346         struct cfg80211_ap_settings params;
3347         int err;
3348
3349         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3350             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3351                 return -EOPNOTSUPP;
3352
3353         if (!rdev->ops->start_ap)
3354                 return -EOPNOTSUPP;
3355
3356         if (wdev->beacon_interval)
3357                 return -EALREADY;
3358
3359         memset(&params, 0, sizeof(params));
3360
3361         /* these are required for START_AP */
3362         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3363             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3364             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3365                 return -EINVAL;
3366
3367         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3368         if (err)
3369                 return err;
3370
3371         params.beacon_interval =
3372                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3373         params.dtim_period =
3374                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3375
3376         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3377         if (err)
3378                 return err;
3379
3380         /*
3381          * In theory, some of these attributes should be required here
3382          * but since they were not used when the command was originally
3383          * added, keep them optional for old user space programs to let
3384          * them continue to work with drivers that do not need the
3385          * additional information -- drivers must check!
3386          */
3387         if (info->attrs[NL80211_ATTR_SSID]) {
3388                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3389                 params.ssid_len =
3390                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3391                 if (params.ssid_len == 0 ||
3392                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3393                         return -EINVAL;
3394         }
3395
3396         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3397                 params.hidden_ssid = nla_get_u32(
3398                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3399                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3400                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3401                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3402                         return -EINVAL;
3403         }
3404
3405         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3406
3407         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3408                 params.auth_type = nla_get_u32(
3409                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3410                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3411                                              NL80211_CMD_START_AP))
3412                         return -EINVAL;
3413         } else
3414                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3415
3416         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3417                                       NL80211_MAX_NR_CIPHER_SUITES);
3418         if (err)
3419                 return err;
3420
3421         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3422                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3423                         return -EOPNOTSUPP;
3424                 params.inactivity_timeout = nla_get_u16(
3425                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3426         }
3427
3428         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3429                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3430                         return -EINVAL;
3431                 params.p2p_ctwindow =
3432                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3433                 if (params.p2p_ctwindow > 127)
3434                         return -EINVAL;
3435                 if (params.p2p_ctwindow != 0 &&
3436                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3437                         return -EINVAL;
3438         }
3439
3440         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3441                 u8 tmp;
3442
3443                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3444                         return -EINVAL;
3445                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3446                 if (tmp > 1)
3447                         return -EINVAL;
3448                 params.p2p_opp_ps = tmp;
3449                 if (params.p2p_opp_ps != 0 &&
3450                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3451                         return -EINVAL;
3452         }
3453
3454         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3455                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3456                 if (err)
3457                         return err;
3458         } else if (wdev->preset_chandef.chan) {
3459                 params.chandef = wdev->preset_chandef;
3460         } else if (!nl80211_get_ap_channel(rdev, &params))
3461                 return -EINVAL;
3462
3463         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3464                                            wdev->iftype))
3465                 return -EINVAL;
3466
3467         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3468                 params.smps_mode =
3469                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3470                 switch (params.smps_mode) {
3471                 case NL80211_SMPS_OFF:
3472                         break;
3473                 case NL80211_SMPS_STATIC:
3474                         if (!(rdev->wiphy.features &
3475                               NL80211_FEATURE_STATIC_SMPS))
3476                                 return -EINVAL;
3477                         break;
3478                 case NL80211_SMPS_DYNAMIC:
3479                         if (!(rdev->wiphy.features &
3480                               NL80211_FEATURE_DYNAMIC_SMPS))
3481                                 return -EINVAL;
3482                         break;
3483                 default:
3484                         return -EINVAL;
3485                 }
3486         } else {
3487                 params.smps_mode = NL80211_SMPS_OFF;
3488         }
3489
3490         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3491                 params.acl = parse_acl_data(&rdev->wiphy, info);
3492                 if (IS_ERR(params.acl))
3493                         return PTR_ERR(params.acl);
3494         }
3495
3496         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3497         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3498                 return -EOPNOTSUPP;
3499
3500         wdev_lock(wdev);
3501         err = rdev_start_ap(rdev, dev, &params);
3502         if (!err) {
3503                 wdev->preset_chandef = params.chandef;
3504                 wdev->beacon_interval = params.beacon_interval;
3505                 wdev->chandef = params.chandef;
3506                 wdev->ssid_len = params.ssid_len;
3507                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3508         }
3509         wdev_unlock(wdev);
3510
3511         kfree(params.acl);
3512
3513         return err;
3514 }
3515
3516 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3517 {
3518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3519         struct net_device *dev = info->user_ptr[1];
3520         struct wireless_dev *wdev = dev->ieee80211_ptr;
3521         struct cfg80211_beacon_data params;
3522         int err;
3523
3524         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3525             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3526                 return -EOPNOTSUPP;
3527
3528         if (!rdev->ops->change_beacon)
3529                 return -EOPNOTSUPP;
3530
3531         if (!wdev->beacon_interval)
3532                 return -EINVAL;
3533
3534         err = nl80211_parse_beacon(info->attrs, &params);
3535         if (err)
3536                 return err;
3537
3538         wdev_lock(wdev);
3539         err = rdev_change_beacon(rdev, dev, &params);
3540         wdev_unlock(wdev);
3541
3542         return err;
3543 }
3544
3545 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3546 {
3547         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3548         struct net_device *dev = info->user_ptr[1];
3549
3550         return cfg80211_stop_ap(rdev, dev, false);
3551 }
3552
3553 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3554         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3555         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3556         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3557         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3558         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3559         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3560 };
3561
3562 static int parse_station_flags(struct genl_info *info,
3563                                enum nl80211_iftype iftype,
3564                                struct station_parameters *params)
3565 {
3566         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3567         struct nlattr *nla;
3568         int flag;
3569
3570         /*
3571          * Try parsing the new attribute first so userspace
3572          * can specify both for older kernels.
3573          */
3574         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3575         if (nla) {
3576                 struct nl80211_sta_flag_update *sta_flags;
3577
3578                 sta_flags = nla_data(nla);
3579                 params->sta_flags_mask = sta_flags->mask;
3580                 params->sta_flags_set = sta_flags->set;
3581                 params->sta_flags_set &= params->sta_flags_mask;
3582                 if ((params->sta_flags_mask |
3583                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3584                         return -EINVAL;
3585                 return 0;
3586         }
3587
3588         /* if present, parse the old attribute */
3589
3590         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3591         if (!nla)
3592                 return 0;
3593
3594         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3595                              nla, sta_flags_policy))
3596                 return -EINVAL;
3597
3598         /*
3599          * Only allow certain flags for interface types so that
3600          * other attributes are silently ignored. Remember that
3601          * this is backward compatibility code with old userspace
3602          * and shouldn't be hit in other cases anyway.
3603          */
3604         switch (iftype) {
3605         case NL80211_IFTYPE_AP:
3606         case NL80211_IFTYPE_AP_VLAN:
3607         case NL80211_IFTYPE_P2P_GO:
3608                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3609                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3610                                          BIT(NL80211_STA_FLAG_WME) |
3611                                          BIT(NL80211_STA_FLAG_MFP);
3612                 break;
3613         case NL80211_IFTYPE_P2P_CLIENT:
3614         case NL80211_IFTYPE_STATION:
3615                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3616                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3617                 break;
3618         case NL80211_IFTYPE_MESH_POINT:
3619                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3620                                          BIT(NL80211_STA_FLAG_MFP) |
3621                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3622         default:
3623                 return -EINVAL;
3624         }
3625
3626         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3627                 if (flags[flag]) {
3628                         params->sta_flags_set |= (1<<flag);
3629
3630                         /* no longer support new API additions in old API */
3631                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3632                                 return -EINVAL;
3633                 }
3634         }
3635
3636         return 0;
3637 }
3638
3639 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3640                                  int attr)
3641 {
3642         struct nlattr *rate;
3643         u32 bitrate;
3644         u16 bitrate_compat;
3645         enum nl80211_attrs rate_flg;
3646
3647         rate = nla_nest_start(msg, attr);
3648         if (!rate)
3649                 return false;
3650
3651         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3652         bitrate = cfg80211_calculate_bitrate(info);
3653         /* report 16-bit bitrate only if we can */
3654         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3655         if (bitrate > 0 &&
3656             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3657                 return false;
3658         if (bitrate_compat > 0 &&
3659             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3660                 return false;
3661
3662         switch (info->bw) {
3663         case RATE_INFO_BW_5:
3664                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3665                 break;
3666         case RATE_INFO_BW_10:
3667                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3668                 break;
3669         default:
3670                 WARN_ON(1);
3671                 /* fall through */
3672         case RATE_INFO_BW_20:
3673                 rate_flg = 0;
3674                 break;
3675         case RATE_INFO_BW_40:
3676                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3677                 break;
3678         case RATE_INFO_BW_80:
3679                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3680                 break;
3681         case RATE_INFO_BW_160:
3682                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3683                 break;
3684         }
3685
3686         if (rate_flg && nla_put_flag(msg, rate_flg))
3687                 return false;
3688
3689         if (info->flags & RATE_INFO_FLAGS_MCS) {
3690                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3691                         return false;
3692                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3693                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3694                         return false;
3695         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3696                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3697                         return false;
3698                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3699                         return false;
3700                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3701                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3702                         return false;
3703         }
3704
3705         nla_nest_end(msg, rate);
3706         return true;
3707 }
3708
3709 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3710                                int id)
3711 {
3712         void *attr;
3713         int i = 0;
3714
3715         if (!mask)
3716                 return true;
3717
3718         attr = nla_nest_start(msg, id);
3719         if (!attr)
3720                 return false;
3721
3722         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3723                 if (!(mask & BIT(i)))
3724                         continue;
3725
3726                 if (nla_put_u8(msg, i, signal[i]))
3727                         return false;
3728         }
3729
3730         nla_nest_end(msg, attr);
3731
3732         return true;
3733 }
3734
3735 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3736                                 u32 seq, int flags,
3737                                 struct cfg80211_registered_device *rdev,
3738                                 struct net_device *dev,
3739                                 const u8 *mac_addr, struct station_info *sinfo)
3740 {
3741         void *hdr;
3742         struct nlattr *sinfoattr, *bss_param;
3743
3744         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3745         if (!hdr)
3746                 return -1;
3747
3748         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3749             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3750             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3751                 goto nla_put_failure;
3752
3753         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3754         if (!sinfoattr)
3755                 goto nla_put_failure;
3756
3757 #define PUT_SINFO(attr, memb, type) do {                                \
3758         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3759             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3760                              sinfo->memb))                              \
3761                 goto nla_put_failure;                                   \
3762         } while (0)
3763
3764         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3765         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3766
3767         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3768                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3769             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3770                         (u32)sinfo->rx_bytes))
3771                 goto nla_put_failure;
3772
3773         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3774                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3775             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3776                         (u32)sinfo->tx_bytes))
3777                 goto nla_put_failure;
3778
3779         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3780         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3781         PUT_SINFO(LLID, llid, u16);
3782         PUT_SINFO(PLID, plid, u16);
3783         PUT_SINFO(PLINK_STATE, plink_state, u8);
3784
3785         switch (rdev->wiphy.signal_type) {
3786         case CFG80211_SIGNAL_TYPE_MBM:
3787                 PUT_SINFO(SIGNAL, signal, u8);
3788                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3789                 break;
3790         default:
3791                 break;
3792         }
3793         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3794                 if (!nl80211_put_signal(msg, sinfo->chains,
3795                                         sinfo->chain_signal,
3796                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3797                         goto nla_put_failure;
3798         }
3799         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3800                 if (!nl80211_put_signal(msg, sinfo->chains,
3801                                         sinfo->chain_signal_avg,
3802                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3803                         goto nla_put_failure;
3804         }
3805         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3806                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3807                                           NL80211_STA_INFO_TX_BITRATE))
3808                         goto nla_put_failure;
3809         }
3810         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3811                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3812                                           NL80211_STA_INFO_RX_BITRATE))
3813                         goto nla_put_failure;
3814         }
3815
3816         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3817         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3818         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3819         PUT_SINFO(TX_FAILED, tx_failed, u32);
3820         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3821         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3822         PUT_SINFO(LOCAL_PM, local_pm, u32);
3823         PUT_SINFO(PEER_PM, peer_pm, u32);
3824         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3825
3826         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3827                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3828                 if (!bss_param)
3829                         goto nla_put_failure;
3830
3831                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3832                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3833                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3834                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3835                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3836                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3837                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3838                                sinfo->bss_param.dtim_period) ||
3839                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3840                                 sinfo->bss_param.beacon_interval))
3841                         goto nla_put_failure;
3842
3843                 nla_nest_end(msg, bss_param);
3844         }
3845         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3846             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3847                     sizeof(struct nl80211_sta_flag_update),
3848                     &sinfo->sta_flags))
3849                 goto nla_put_failure;
3850
3851         PUT_SINFO(T_OFFSET, t_offset, u64);
3852         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3853         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3854         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3855
3856 #undef PUT_SINFO
3857
3858         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3859                 struct nlattr *tidsattr;
3860                 int tid;
3861
3862                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3863                 if (!tidsattr)
3864                         goto nla_put_failure;
3865
3866                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3867                         struct cfg80211_tid_stats *tidstats;
3868                         struct nlattr *tidattr;
3869
3870                         tidstats = &sinfo->pertid[tid];
3871
3872                         if (!tidstats->filled)
3873                                 continue;
3874
3875                         tidattr = nla_nest_start(msg, tid + 1);
3876                         if (!tidattr)
3877                                 goto nla_put_failure;
3878
3879 #define PUT_TIDVAL(attr, memb, type) do {                               \
3880         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3881             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3882                              tidstats->memb))                           \
3883                 goto nla_put_failure;                                   \
3884         } while (0)
3885
3886                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3887                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3888                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3889                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3890
3891 #undef PUT_TIDVAL
3892                         nla_nest_end(msg, tidattr);
3893                 }
3894
3895                 nla_nest_end(msg, tidsattr);
3896         }
3897
3898         nla_nest_end(msg, sinfoattr);
3899
3900         if (sinfo->assoc_req_ies_len &&
3901             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3902                     sinfo->assoc_req_ies))
3903                 goto nla_put_failure;
3904
3905         genlmsg_end(msg, hdr);
3906         return 0;
3907
3908  nla_put_failure:
3909         genlmsg_cancel(msg, hdr);
3910         return -EMSGSIZE;
3911 }
3912
3913 static int nl80211_dump_station(struct sk_buff *skb,
3914                                 struct netlink_callback *cb)
3915 {
3916         struct station_info sinfo;
3917         struct cfg80211_registered_device *rdev;
3918         struct wireless_dev *wdev;
3919         u8 mac_addr[ETH_ALEN];
3920         int sta_idx = cb->args[2];
3921         int err;
3922
3923         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3924         if (err)
3925                 return err;
3926
3927         if (!wdev->netdev) {
3928                 err = -EINVAL;
3929                 goto out_err;
3930         }
3931
3932         if (!rdev->ops->dump_station) {
3933                 err = -EOPNOTSUPP;
3934                 goto out_err;
3935         }
3936
3937         while (1) {
3938                 memset(&sinfo, 0, sizeof(sinfo));
3939                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3940                                         mac_addr, &sinfo);
3941                 if (err == -ENOENT)
3942                         break;
3943                 if (err)
3944                         goto out_err;
3945
3946                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3947                                 NETLINK_CB(cb->skb).portid,
3948                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3949                                 rdev, wdev->netdev, mac_addr,
3950                                 &sinfo) < 0)
3951                         goto out;
3952
3953                 sta_idx++;
3954         }
3955
3956
3957  out:
3958         cb->args[2] = sta_idx;
3959         err = skb->len;
3960  out_err:
3961         nl80211_finish_wdev_dump(rdev);
3962
3963         return err;
3964 }
3965
3966 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3967 {
3968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3969         struct net_device *dev = info->user_ptr[1];
3970         struct station_info sinfo;
3971         struct sk_buff *msg;
3972         u8 *mac_addr = NULL;
3973         int err;
3974
3975         memset(&sinfo, 0, sizeof(sinfo));
3976
3977         if (!info->attrs[NL80211_ATTR_MAC])
3978                 return -EINVAL;
3979
3980         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3981
3982         if (!rdev->ops->get_station)
3983                 return -EOPNOTSUPP;
3984
3985         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3986         if (err)
3987                 return err;
3988
3989         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3990         if (!msg)
3991                 return -ENOMEM;
3992
3993         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
3994                                  info->snd_portid, info->snd_seq, 0,
3995                                  rdev, dev, mac_addr, &sinfo) < 0) {
3996                 nlmsg_free(msg);
3997                 return -ENOBUFS;
3998         }
3999
4000         return genlmsg_reply(msg, info);
4001 }
4002
4003 int cfg80211_check_station_change(struct wiphy *wiphy,
4004                                   struct station_parameters *params,
4005                                   enum cfg80211_station_type statype)
4006 {
4007         if (params->listen_interval != -1 &&
4008             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4009                 return -EINVAL;
4010
4011         if (params->support_p2p_ps != -1 &&
4012             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4013                 return -EINVAL;
4014
4015         if (params->aid &&
4016             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4017             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4018                 return -EINVAL;
4019
4020         /* When you run into this, adjust the code below for the new flag */
4021         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4022
4023         switch (statype) {
4024         case CFG80211_STA_MESH_PEER_KERNEL:
4025         case CFG80211_STA_MESH_PEER_USER:
4026                 /*
4027                  * No ignoring the TDLS flag here -- the userspace mesh
4028                  * code doesn't have the bug of including TDLS in the
4029                  * mask everywhere.
4030                  */
4031                 if (params->sta_flags_mask &
4032                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4033                                   BIT(NL80211_STA_FLAG_MFP) |
4034                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4035                         return -EINVAL;
4036                 break;
4037         case CFG80211_STA_TDLS_PEER_SETUP:
4038         case CFG80211_STA_TDLS_PEER_ACTIVE:
4039                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4040                         return -EINVAL;
4041                 /* ignore since it can't change */
4042                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4043                 break;
4044         default:
4045                 /* disallow mesh-specific things */
4046                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4047                         return -EINVAL;
4048                 if (params->local_pm)
4049                         return -EINVAL;
4050                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4051                         return -EINVAL;
4052         }
4053
4054         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4055             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4056                 /* TDLS can't be set, ... */
4057                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4058                         return -EINVAL;
4059                 /*
4060                  * ... but don't bother the driver with it. This works around
4061                  * a hostapd/wpa_supplicant issue -- it always includes the
4062                  * TLDS_PEER flag in the mask even for AP mode.
4063                  */
4064                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4065         }
4066
4067         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4068             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4069                 /* reject other things that can't change */
4070                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4071                         return -EINVAL;
4072                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4073                         return -EINVAL;
4074                 if (params->supported_rates)
4075                         return -EINVAL;
4076                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4077                         return -EINVAL;
4078         }
4079
4080         if (statype != CFG80211_STA_AP_CLIENT &&
4081             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4082                 if (params->vlan)
4083                         return -EINVAL;
4084         }
4085
4086         switch (statype) {
4087         case CFG80211_STA_AP_MLME_CLIENT:
4088                 /* Use this only for authorizing/unauthorizing a station */
4089                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4090                         return -EOPNOTSUPP;
4091                 break;
4092         case CFG80211_STA_AP_CLIENT:
4093         case CFG80211_STA_AP_CLIENT_UNASSOC:
4094                 /* accept only the listed bits */
4095                 if (params->sta_flags_mask &
4096                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4097                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4098                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4099                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4100                                   BIT(NL80211_STA_FLAG_WME) |
4101                                   BIT(NL80211_STA_FLAG_MFP)))
4102                         return -EINVAL;
4103
4104                 /* but authenticated/associated only if driver handles it */
4105                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4106                     params->sta_flags_mask &
4107                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4108                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4109                         return -EINVAL;
4110                 break;
4111         case CFG80211_STA_IBSS:
4112         case CFG80211_STA_AP_STA:
4113                 /* reject any changes other than AUTHORIZED */
4114                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4115                         return -EINVAL;
4116                 break;
4117         case CFG80211_STA_TDLS_PEER_SETUP:
4118                 /* reject any changes other than AUTHORIZED or WME */
4119                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4120                                                BIT(NL80211_STA_FLAG_WME)))
4121                         return -EINVAL;
4122                 /* force (at least) rates when authorizing */
4123                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4124                     !params->supported_rates)
4125                         return -EINVAL;
4126                 break;
4127         case CFG80211_STA_TDLS_PEER_ACTIVE:
4128                 /* reject any changes */
4129                 return -EINVAL;
4130         case CFG80211_STA_MESH_PEER_KERNEL:
4131                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4132                         return -EINVAL;
4133                 break;
4134         case CFG80211_STA_MESH_PEER_USER:
4135                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4136                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4137                         return -EINVAL;
4138                 break;
4139         }
4140
4141         return 0;
4142 }
4143 EXPORT_SYMBOL(cfg80211_check_station_change);
4144
4145 /*
4146  * Get vlan interface making sure it is running and on the right wiphy.
4147  */
4148 static struct net_device *get_vlan(struct genl_info *info,
4149                                    struct cfg80211_registered_device *rdev)
4150 {
4151         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4152         struct net_device *v;
4153         int ret;
4154
4155         if (!vlanattr)
4156                 return NULL;
4157
4158         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4159         if (!v)
4160                 return ERR_PTR(-ENODEV);
4161
4162         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4163                 ret = -EINVAL;
4164                 goto error;
4165         }
4166
4167         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4168             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4169             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4170                 ret = -EINVAL;
4171                 goto error;
4172         }
4173
4174         if (!netif_running(v)) {
4175                 ret = -ENETDOWN;
4176                 goto error;
4177         }
4178
4179         return v;
4180  error:
4181         dev_put(v);
4182         return ERR_PTR(ret);
4183 }
4184
4185 static const struct nla_policy
4186 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4187         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4188         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4189 };
4190
4191 static int nl80211_parse_sta_wme(struct genl_info *info,
4192                                  struct station_parameters *params)
4193 {
4194         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4195         struct nlattr *nla;
4196         int err;
4197
4198         /* parse WME attributes if present */
4199         if (!info->attrs[NL80211_ATTR_STA_WME])
4200                 return 0;
4201
4202         nla = info->attrs[NL80211_ATTR_STA_WME];
4203         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4204                                nl80211_sta_wme_policy);
4205         if (err)
4206                 return err;
4207
4208         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4209                 params->uapsd_queues = nla_get_u8(
4210                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4211         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4212                 return -EINVAL;
4213
4214         if (tb[NL80211_STA_WME_MAX_SP])
4215                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4216
4217         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4218                 return -EINVAL;
4219
4220         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4221
4222         return 0;
4223 }
4224
4225 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4226                                       struct station_parameters *params)
4227 {
4228         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4229                 params->supported_channels =
4230                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4231                 params->supported_channels_len =
4232                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4233                 /*
4234                  * Need to include at least one (first channel, number of
4235                  * channels) tuple for each subband, and must have proper
4236                  * tuples for the rest of the data as well.
4237                  */
4238                 if (params->supported_channels_len < 2)
4239                         return -EINVAL;
4240                 if (params->supported_channels_len % 2)
4241                         return -EINVAL;
4242         }
4243
4244         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4245                 params->supported_oper_classes =
4246                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4247                 params->supported_oper_classes_len =
4248                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4249                 /*
4250                  * The value of the Length field of the Supported Operating
4251                  * Classes element is between 2 and 253.
4252                  */
4253                 if (params->supported_oper_classes_len < 2 ||
4254                     params->supported_oper_classes_len > 253)
4255                         return -EINVAL;
4256         }
4257         return 0;
4258 }
4259
4260 static int nl80211_set_station_tdls(struct genl_info *info,
4261                                     struct station_parameters *params)
4262 {
4263         int err;
4264         /* Dummy STA entry gets updated once the peer capabilities are known */
4265         if (info->attrs[NL80211_ATTR_PEER_AID])
4266                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4267         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4268                 params->ht_capa =
4269                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4270         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4271                 params->vht_capa =
4272                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4273
4274         err = nl80211_parse_sta_channel_info(info, params);
4275         if (err)
4276                 return err;
4277
4278         return nl80211_parse_sta_wme(info, params);
4279 }
4280
4281 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4282 {
4283         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4284         struct net_device *dev = info->user_ptr[1];
4285         struct station_parameters params;
4286         u8 *mac_addr;
4287         int err;
4288
4289         memset(&params, 0, sizeof(params));
4290
4291         if (!rdev->ops->change_station)
4292                 return -EOPNOTSUPP;
4293
4294         /*
4295          * AID and listen_interval properties can be set only for unassociated
4296          * station. Include these parameters here and will check them in
4297          * cfg80211_check_station_change().
4298          */
4299         if (info->attrs[NL80211_ATTR_STA_AID])
4300                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4301
4302         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4303                 params.listen_interval =
4304                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4305         else
4306                 params.listen_interval = -1;
4307
4308         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4309                 u8 tmp;
4310
4311                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4312                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4313                         return -EINVAL;
4314
4315                 params.support_p2p_ps = tmp;
4316         } else {
4317                 params.support_p2p_ps = -1;
4318         }
4319
4320         if (!info->attrs[NL80211_ATTR_MAC])
4321                 return -EINVAL;
4322
4323         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4324
4325         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4326                 params.supported_rates =
4327                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4328                 params.supported_rates_len =
4329                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4330         }
4331
4332         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4333                 params.capability =
4334                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4335                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4336         }
4337
4338         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4339                 params.ext_capab =
4340                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4341                 params.ext_capab_len =
4342                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4343         }
4344
4345         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4346                 return -EINVAL;
4347
4348         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4349                 params.plink_action =
4350                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4351                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4352                         return -EINVAL;
4353         }
4354
4355         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4356                 params.plink_state =
4357                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4358                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4359                         return -EINVAL;
4360                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4361         }
4362
4363         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4364                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4365                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4366
4367                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4368                     pm > NL80211_MESH_POWER_MAX)
4369                         return -EINVAL;
4370
4371                 params.local_pm = pm;
4372         }
4373
4374         /* Include parameters for TDLS peer (will check later) */
4375         err = nl80211_set_station_tdls(info, &params);
4376         if (err)
4377                 return err;
4378
4379         params.vlan = get_vlan(info, rdev);
4380         if (IS_ERR(params.vlan))
4381                 return PTR_ERR(params.vlan);
4382
4383         switch (dev->ieee80211_ptr->iftype) {
4384         case NL80211_IFTYPE_AP:
4385         case NL80211_IFTYPE_AP_VLAN:
4386         case NL80211_IFTYPE_P2P_GO:
4387         case NL80211_IFTYPE_P2P_CLIENT:
4388         case NL80211_IFTYPE_STATION:
4389         case NL80211_IFTYPE_ADHOC:
4390         case NL80211_IFTYPE_MESH_POINT:
4391                 break;
4392         default:
4393                 err = -EOPNOTSUPP;
4394                 goto out_put_vlan;
4395         }
4396
4397         /* driver will call cfg80211_check_station_change() */
4398         err = rdev_change_station(rdev, dev, mac_addr, &params);
4399
4400  out_put_vlan:
4401         if (params.vlan)
4402                 dev_put(params.vlan);
4403
4404         return err;
4405 }
4406
4407 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4408 {
4409         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4410         int err;
4411         struct net_device *dev = info->user_ptr[1];
4412         struct station_parameters params;
4413         u8 *mac_addr = NULL;
4414         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4415                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4416
4417         memset(&params, 0, sizeof(params));
4418
4419         if (!rdev->ops->add_station)
4420                 return -EOPNOTSUPP;
4421
4422         if (!info->attrs[NL80211_ATTR_MAC])
4423                 return -EINVAL;
4424
4425         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4426                 return -EINVAL;
4427
4428         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4429                 return -EINVAL;
4430
4431         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4432             !info->attrs[NL80211_ATTR_PEER_AID])
4433                 return -EINVAL;
4434
4435         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4436         params.supported_rates =
4437                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4438         params.supported_rates_len =
4439                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4440         params.listen_interval =
4441                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4442
4443         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4444                 u8 tmp;
4445
4446                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4447                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4448                         return -EINVAL;
4449
4450                 params.support_p2p_ps = tmp;
4451         } else {
4452                 /*
4453                  * if not specified, assume it's supported for P2P GO interface,
4454                  * and is NOT supported for AP interface
4455                  */
4456                 params.support_p2p_ps =
4457                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4458         }
4459
4460         if (info->attrs[NL80211_ATTR_PEER_AID])
4461                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4462         else
4463                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4464         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4465                 return -EINVAL;
4466
4467         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4468                 params.capability =
4469                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4470                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4471         }
4472
4473         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4474                 params.ext_capab =
4475                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4476                 params.ext_capab_len =
4477                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4478         }
4479
4480         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4481                 params.ht_capa =
4482                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4483
4484         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4485                 params.vht_capa =
4486                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4487
4488         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4489                 params.opmode_notif_used = true;
4490                 params.opmode_notif =
4491                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4492         }
4493
4494         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4495                 params.plink_action =
4496                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4497                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4498                         return -EINVAL;
4499         }
4500
4501         err = nl80211_parse_sta_channel_info(info, &params);
4502         if (err)
4503                 return err;
4504
4505         err = nl80211_parse_sta_wme(info, &params);
4506         if (err)
4507                 return err;
4508
4509         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4510                 return -EINVAL;
4511
4512         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4513          * as userspace might just pass through the capabilities from the IEs
4514          * directly, rather than enforcing this restriction and returning an
4515          * error in this case.
4516          */
4517         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4518                 params.ht_capa = NULL;
4519                 params.vht_capa = NULL;
4520         }
4521
4522         /* When you run into this, adjust the code below for the new flag */
4523         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4524
4525         switch (dev->ieee80211_ptr->iftype) {
4526         case NL80211_IFTYPE_AP:
4527         case NL80211_IFTYPE_AP_VLAN:
4528         case NL80211_IFTYPE_P2P_GO:
4529                 /* ignore WME attributes if iface/sta is not capable */
4530                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4531                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4532                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4533
4534                 /* TDLS peers cannot be added */
4535                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4536                     info->attrs[NL80211_ATTR_PEER_AID])
4537                         return -EINVAL;
4538                 /* but don't bother the driver with it */
4539                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4540
4541                 /* allow authenticated/associated only if driver handles it */
4542                 if (!(rdev->wiphy.features &
4543                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4544                     params.sta_flags_mask & auth_assoc)
4545                         return -EINVAL;
4546
4547                 /* Older userspace, or userspace wanting to be compatible with
4548                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4549                  * and assoc flags in the mask, but assumes the station will be
4550                  * added as associated anyway since this was the required driver
4551                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4552                  * introduced.
4553                  * In order to not bother drivers with this quirk in the API
4554                  * set the flags in both the mask and set for new stations in
4555                  * this case.
4556                  */
4557                 if (!(params.sta_flags_mask & auth_assoc)) {
4558                         params.sta_flags_mask |= auth_assoc;
4559                         params.sta_flags_set |= auth_assoc;
4560                 }
4561
4562                 /* must be last in here for error handling */
4563                 params.vlan = get_vlan(info, rdev);
4564                 if (IS_ERR(params.vlan))
4565                         return PTR_ERR(params.vlan);
4566                 break;
4567         case NL80211_IFTYPE_MESH_POINT:
4568                 /* ignore uAPSD data */
4569                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4570
4571                 /* associated is disallowed */
4572                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4573                         return -EINVAL;
4574                 /* TDLS peers cannot be added */
4575                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4576                     info->attrs[NL80211_ATTR_PEER_AID])
4577                         return -EINVAL;
4578                 break;
4579         case NL80211_IFTYPE_STATION:
4580         case NL80211_IFTYPE_P2P_CLIENT:
4581                 /* ignore uAPSD data */
4582                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4583
4584                 /* these are disallowed */
4585                 if (params.sta_flags_mask &
4586                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4587                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4588                         return -EINVAL;
4589                 /* Only TDLS peers can be added */
4590                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4591                         return -EINVAL;
4592                 /* Can only add if TDLS ... */
4593                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4594                         return -EOPNOTSUPP;
4595                 /* ... with external setup is supported */
4596                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4597                         return -EOPNOTSUPP;
4598                 /*
4599                  * Older wpa_supplicant versions always mark the TDLS peer
4600                  * as authorized, but it shouldn't yet be.
4601                  */
4602                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4603                 break;
4604         default:
4605                 return -EOPNOTSUPP;
4606         }
4607
4608         /* be aware of params.vlan when changing code here */
4609
4610         err = rdev_add_station(rdev, dev, mac_addr, &params);
4611
4612         if (params.vlan)
4613                 dev_put(params.vlan);
4614         return err;
4615 }
4616
4617 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4618 {
4619         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4620         struct net_device *dev = info->user_ptr[1];
4621         struct station_del_parameters params;
4622
4623         memset(&params, 0, sizeof(params));
4624
4625         if (info->attrs[NL80211_ATTR_MAC])
4626                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4627
4628         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4629             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4630             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4631             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4632                 return -EINVAL;
4633
4634         if (!rdev->ops->del_station)
4635                 return -EOPNOTSUPP;
4636
4637         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4638                 params.subtype =
4639                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4640                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4641                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4642                         return -EINVAL;
4643         } else {
4644                 /* Default to Deauthentication frame */
4645                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4646         }
4647
4648         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4649                 params.reason_code =
4650                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4651                 if (params.reason_code == 0)
4652                         return -EINVAL; /* 0 is reserved */
4653         } else {
4654                 /* Default to reason code 2 */
4655                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4656         }
4657
4658         return rdev_del_station(rdev, dev, &params);
4659 }
4660
4661 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4662                                 int flags, struct net_device *dev,
4663                                 u8 *dst, u8 *next_hop,
4664                                 struct mpath_info *pinfo)
4665 {
4666         void *hdr;
4667         struct nlattr *pinfoattr;
4668
4669         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4670         if (!hdr)
4671                 return -1;
4672
4673         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4674             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4675             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4676             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4677                 goto nla_put_failure;
4678
4679         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4680         if (!pinfoattr)
4681                 goto nla_put_failure;
4682         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4683             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4684                         pinfo->frame_qlen))
4685                 goto nla_put_failure;
4686         if (((pinfo->filled & MPATH_INFO_SN) &&
4687              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4688             ((pinfo->filled & MPATH_INFO_METRIC) &&
4689              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4690                          pinfo->metric)) ||
4691             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4692              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4693                          pinfo->exptime)) ||
4694             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4695              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4696                         pinfo->flags)) ||
4697             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4698              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4699                          pinfo->discovery_timeout)) ||
4700             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4701              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4702                         pinfo->discovery_retries)))
4703                 goto nla_put_failure;
4704
4705         nla_nest_end(msg, pinfoattr);
4706
4707         genlmsg_end(msg, hdr);
4708         return 0;
4709
4710  nla_put_failure:
4711         genlmsg_cancel(msg, hdr);
4712         return -EMSGSIZE;
4713 }
4714
4715 static int nl80211_dump_mpath(struct sk_buff *skb,
4716                               struct netlink_callback *cb)
4717 {
4718         struct mpath_info pinfo;
4719         struct cfg80211_registered_device *rdev;
4720         struct wireless_dev *wdev;
4721         u8 dst[ETH_ALEN];
4722         u8 next_hop[ETH_ALEN];
4723         int path_idx = cb->args[2];
4724         int err;
4725
4726         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4727         if (err)
4728                 return err;
4729
4730         if (!rdev->ops->dump_mpath) {
4731                 err = -EOPNOTSUPP;
4732                 goto out_err;
4733         }
4734
4735         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4736                 err = -EOPNOTSUPP;
4737                 goto out_err;
4738         }
4739
4740         while (1) {
4741                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4742                                       next_hop, &pinfo);
4743                 if (err == -ENOENT)
4744                         break;
4745                 if (err)
4746                         goto out_err;
4747
4748                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4749                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4750                                        wdev->netdev, dst, next_hop,
4751                                        &pinfo) < 0)
4752                         goto out;
4753
4754                 path_idx++;
4755         }
4756
4757
4758  out:
4759         cb->args[2] = path_idx;
4760         err = skb->len;
4761  out_err:
4762         nl80211_finish_wdev_dump(rdev);
4763         return err;
4764 }
4765
4766 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4767 {
4768         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4769         int err;
4770         struct net_device *dev = info->user_ptr[1];
4771         struct mpath_info pinfo;
4772         struct sk_buff *msg;
4773         u8 *dst = NULL;
4774         u8 next_hop[ETH_ALEN];
4775
4776         memset(&pinfo, 0, sizeof(pinfo));
4777
4778         if (!info->attrs[NL80211_ATTR_MAC])
4779                 return -EINVAL;
4780
4781         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4782
4783         if (!rdev->ops->get_mpath)
4784                 return -EOPNOTSUPP;
4785
4786         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4787                 return -EOPNOTSUPP;
4788
4789         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4790         if (err)
4791                 return err;
4792
4793         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4794         if (!msg)
4795                 return -ENOMEM;
4796
4797         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4798                                  dev, dst, next_hop, &pinfo) < 0) {
4799                 nlmsg_free(msg);
4800                 return -ENOBUFS;
4801         }
4802
4803         return genlmsg_reply(msg, info);
4804 }
4805
4806 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4807 {
4808         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4809         struct net_device *dev = info->user_ptr[1];
4810         u8 *dst = NULL;
4811         u8 *next_hop = NULL;
4812
4813         if (!info->attrs[NL80211_ATTR_MAC])
4814                 return -EINVAL;
4815
4816         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4817                 return -EINVAL;
4818
4819         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4820         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4821
4822         if (!rdev->ops->change_mpath)
4823                 return -EOPNOTSUPP;
4824
4825         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4826                 return -EOPNOTSUPP;
4827
4828         return rdev_change_mpath(rdev, dev, dst, next_hop);
4829 }
4830
4831 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4832 {
4833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4834         struct net_device *dev = info->user_ptr[1];
4835         u8 *dst = NULL;
4836         u8 *next_hop = NULL;
4837
4838         if (!info->attrs[NL80211_ATTR_MAC])
4839                 return -EINVAL;
4840
4841         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4842                 return -EINVAL;
4843
4844         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4845         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4846
4847         if (!rdev->ops->add_mpath)
4848                 return -EOPNOTSUPP;
4849
4850         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4851                 return -EOPNOTSUPP;
4852
4853         return rdev_add_mpath(rdev, dev, dst, next_hop);
4854 }
4855
4856 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4857 {
4858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4859         struct net_device *dev = info->user_ptr[1];
4860         u8 *dst = NULL;
4861
4862         if (info->attrs[NL80211_ATTR_MAC])
4863                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4864
4865         if (!rdev->ops->del_mpath)
4866                 return -EOPNOTSUPP;
4867
4868         return rdev_del_mpath(rdev, dev, dst);
4869 }
4870
4871 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4872 {
4873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4874         int err;
4875         struct net_device *dev = info->user_ptr[1];
4876         struct mpath_info pinfo;
4877         struct sk_buff *msg;
4878         u8 *dst = NULL;
4879         u8 mpp[ETH_ALEN];
4880
4881         memset(&pinfo, 0, sizeof(pinfo));
4882
4883         if (!info->attrs[NL80211_ATTR_MAC])
4884                 return -EINVAL;
4885
4886         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4887
4888         if (!rdev->ops->get_mpp)
4889                 return -EOPNOTSUPP;
4890
4891         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4892                 return -EOPNOTSUPP;
4893
4894         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4895         if (err)
4896                 return err;
4897
4898         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4899         if (!msg)
4900                 return -ENOMEM;
4901
4902         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4903                                dev, dst, mpp, &pinfo) < 0) {
4904                 nlmsg_free(msg);
4905                 return -ENOBUFS;
4906         }
4907
4908         return genlmsg_reply(msg, info);
4909 }
4910
4911 static int nl80211_dump_mpp(struct sk_buff *skb,
4912                             struct netlink_callback *cb)
4913 {
4914         struct mpath_info pinfo;
4915         struct cfg80211_registered_device *rdev;
4916         struct wireless_dev *wdev;
4917         u8 dst[ETH_ALEN];
4918         u8 mpp[ETH_ALEN];
4919         int path_idx = cb->args[2];
4920         int err;
4921
4922         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4923         if (err)
4924                 return err;
4925
4926         if (!rdev->ops->dump_mpp) {
4927                 err = -EOPNOTSUPP;
4928                 goto out_err;
4929         }
4930
4931         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4932                 err = -EOPNOTSUPP;
4933                 goto out_err;
4934         }
4935
4936         while (1) {
4937                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4938                                     mpp, &pinfo);
4939                 if (err == -ENOENT)
4940                         break;
4941                 if (err)
4942                         goto out_err;
4943
4944                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4945                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4946                                        wdev->netdev, dst, mpp,
4947                                        &pinfo) < 0)
4948                         goto out;
4949
4950                 path_idx++;
4951         }
4952
4953  out:
4954         cb->args[2] = path_idx;
4955         err = skb->len;
4956  out_err:
4957         nl80211_finish_wdev_dump(rdev);
4958         return err;
4959 }
4960
4961 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4962 {
4963         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4964         struct net_device *dev = info->user_ptr[1];
4965         struct wireless_dev *wdev = dev->ieee80211_ptr;
4966         struct bss_parameters params;
4967         int err;
4968
4969         memset(&params, 0, sizeof(params));
4970         /* default to not changing parameters */
4971         params.use_cts_prot = -1;
4972         params.use_short_preamble = -1;
4973         params.use_short_slot_time = -1;
4974         params.ap_isolate = -1;
4975         params.ht_opmode = -1;
4976         params.p2p_ctwindow = -1;
4977         params.p2p_opp_ps = -1;
4978
4979         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4980                 params.use_cts_prot =
4981                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4982         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4983                 params.use_short_preamble =
4984                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4985         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4986                 params.use_short_slot_time =
4987                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4988         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4989                 params.basic_rates =
4990                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4991                 params.basic_rates_len =
4992                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4993         }
4994         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4995                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4996         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4997                 params.ht_opmode =
4998                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4999
5000         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5001                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5002                         return -EINVAL;
5003                 params.p2p_ctwindow =
5004                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5005                 if (params.p2p_ctwindow < 0)
5006                         return -EINVAL;
5007                 if (params.p2p_ctwindow != 0 &&
5008                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5009                         return -EINVAL;
5010         }
5011
5012         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5013                 u8 tmp;
5014
5015                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5016                         return -EINVAL;
5017                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5018                 if (tmp > 1)
5019                         return -EINVAL;
5020                 params.p2p_opp_ps = tmp;
5021                 if (params.p2p_opp_ps &&
5022                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5023                         return -EINVAL;
5024         }
5025
5026         if (!rdev->ops->change_bss)
5027                 return -EOPNOTSUPP;
5028
5029         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5030             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5031                 return -EOPNOTSUPP;
5032
5033         wdev_lock(wdev);
5034         err = rdev_change_bss(rdev, dev, &params);
5035         wdev_unlock(wdev);
5036
5037         return err;
5038 }
5039
5040 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5041 {
5042         char *data = NULL;
5043         bool is_indoor;
5044         enum nl80211_user_reg_hint_type user_reg_hint_type;
5045         u32 owner_nlportid;
5046
5047
5048         /*
5049          * You should only get this when cfg80211 hasn't yet initialized
5050          * completely when built-in to the kernel right between the time
5051          * window between nl80211_init() and regulatory_init(), if that is
5052          * even possible.
5053          */
5054         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5055                 return -EINPROGRESS;
5056
5057         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5058                 user_reg_hint_type =
5059                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5060         else
5061                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5062
5063         switch (user_reg_hint_type) {
5064         case NL80211_USER_REG_HINT_USER:
5065         case NL80211_USER_REG_HINT_CELL_BASE:
5066                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5067                         return -EINVAL;
5068
5069                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5070                 return regulatory_hint_user(data, user_reg_hint_type);
5071         case NL80211_USER_REG_HINT_INDOOR:
5072                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5073                         owner_nlportid = info->snd_portid;
5074                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5075                 } else {
5076                         owner_nlportid = 0;
5077                         is_indoor = true;
5078                 }
5079
5080                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5081         default:
5082                 return -EINVAL;
5083         }
5084 }
5085
5086 static int nl80211_get_mesh_config(struct sk_buff *skb,
5087                                    struct genl_info *info)
5088 {
5089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5090         struct net_device *dev = info->user_ptr[1];
5091         struct wireless_dev *wdev = dev->ieee80211_ptr;
5092         struct mesh_config cur_params;
5093         int err = 0;
5094         void *hdr;
5095         struct nlattr *pinfoattr;
5096         struct sk_buff *msg;
5097
5098         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5099                 return -EOPNOTSUPP;
5100
5101         if (!rdev->ops->get_mesh_config)
5102                 return -EOPNOTSUPP;
5103
5104         wdev_lock(wdev);
5105         /* If not connected, get default parameters */
5106         if (!wdev->mesh_id_len)
5107                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5108         else
5109                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5110         wdev_unlock(wdev);
5111
5112         if (err)
5113                 return err;
5114
5115         /* Draw up a netlink message to send back */
5116         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5117         if (!msg)
5118                 return -ENOMEM;
5119         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5120                              NL80211_CMD_GET_MESH_CONFIG);
5121         if (!hdr)
5122                 goto out;
5123         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5124         if (!pinfoattr)
5125                 goto nla_put_failure;
5126         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5127             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5128                         cur_params.dot11MeshRetryTimeout) ||
5129             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5130                         cur_params.dot11MeshConfirmTimeout) ||
5131             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5132                         cur_params.dot11MeshHoldingTimeout) ||
5133             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5134                         cur_params.dot11MeshMaxPeerLinks) ||
5135             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5136                        cur_params.dot11MeshMaxRetries) ||
5137             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5138                        cur_params.dot11MeshTTL) ||
5139             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5140                        cur_params.element_ttl) ||
5141             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5142                        cur_params.auto_open_plinks) ||
5143             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5144                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5145             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5146                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5147             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5148                         cur_params.path_refresh_time) ||
5149             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5150                         cur_params.min_discovery_timeout) ||
5151             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5152                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5153             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5154                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5155             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5156                         cur_params.dot11MeshHWMPperrMinInterval) ||
5157             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5158                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5159             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5160                        cur_params.dot11MeshHWMPRootMode) ||
5161             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5162                         cur_params.dot11MeshHWMPRannInterval) ||
5163             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5164                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5165             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5166                        cur_params.dot11MeshForwarding) ||
5167             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5168                         cur_params.rssi_threshold) ||
5169             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5170                         cur_params.ht_opmode) ||
5171             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5172                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5173             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5174                         cur_params.dot11MeshHWMProotInterval) ||
5175             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5176                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5177             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5178                         cur_params.power_mode) ||
5179             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5180                         cur_params.dot11MeshAwakeWindowDuration) ||
5181             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5182                         cur_params.plink_timeout))
5183                 goto nla_put_failure;
5184         nla_nest_end(msg, pinfoattr);
5185         genlmsg_end(msg, hdr);
5186         return genlmsg_reply(msg, info);
5187
5188  nla_put_failure:
5189         genlmsg_cancel(msg, hdr);
5190  out:
5191         nlmsg_free(msg);
5192         return -ENOBUFS;
5193 }
5194
5195 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5196         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5197         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5198         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5199         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5200         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5201         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5202         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5203         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5204         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5205         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5206         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5207         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5208         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5209         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5210         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5211         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5212         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5213         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5214         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5215         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5216         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5217         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5218         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5219         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5220         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5221         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5222         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5223         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5224 };
5225
5226 static const struct nla_policy
5227         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5228         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5229         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5230         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5231         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5232         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5233         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5234         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5235                                     .len = IEEE80211_MAX_DATA_LEN },
5236         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5237 };
5238
5239 static int nl80211_parse_mesh_config(struct genl_info *info,
5240                                      struct mesh_config *cfg,
5241                                      u32 *mask_out)
5242 {
5243         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5244         u32 mask = 0;
5245
5246 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5247 do {                                                                        \
5248         if (tb[attr]) {                                                     \
5249                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5250                         return -EINVAL;                                     \
5251                 cfg->param = fn(tb[attr]);                                  \
5252                 mask |= (1 << (attr - 1));                                  \
5253         }                                                                   \
5254 } while (0)
5255
5256
5257         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5258                 return -EINVAL;
5259         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5260                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5261                              nl80211_meshconf_params_policy))
5262                 return -EINVAL;
5263
5264         /* This makes sure that there aren't more than 32 mesh config
5265          * parameters (otherwise our bitfield scheme would not work.) */
5266         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5267
5268         /* Fill in the params struct */
5269         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5270                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5271                                   nla_get_u16);
5272         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5273                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5274                                   nla_get_u16);
5275         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5276                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5277                                   nla_get_u16);
5278         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5279                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5280                                   nla_get_u16);
5281         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5282                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5283                                   nla_get_u8);
5284         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5285                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5286         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5287                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5288                                   nla_get_u8);
5289         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5290                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5291                                   nla_get_u8);
5292         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5293                                   1, 255, mask,
5294                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5295                                   nla_get_u32);
5296         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5297                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5298                                   nla_get_u8);
5299         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5300                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5301                                   nla_get_u32);
5302         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5303                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5304                                   nla_get_u16);
5305         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5306                                   1, 65535, mask,
5307                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5308                                   nla_get_u32);
5309         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5310                                   1, 65535, mask,
5311                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5312                                   nla_get_u16);
5313         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5314                                   1, 65535, mask,
5315                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5316                                   nla_get_u16);
5317         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5318                                   dot11MeshHWMPnetDiameterTraversalTime,
5319                                   1, 65535, mask,
5320                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5321                                   nla_get_u16);
5322         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5323                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5324                                   nla_get_u8);
5325         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5326                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5327                                   nla_get_u16);
5328         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5329                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5330                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5331                                   nla_get_u8);
5332         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5333                                   mask, NL80211_MESHCONF_FORWARDING,
5334                                   nla_get_u8);
5335         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5336                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5337                                   nla_get_s32);
5338         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5339                                   mask, NL80211_MESHCONF_HT_OPMODE,
5340                                   nla_get_u16);
5341         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5342                                   1, 65535, mask,
5343                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5344                                   nla_get_u32);
5345         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5346                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5347                                   nla_get_u16);
5348         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5349                                   dot11MeshHWMPconfirmationInterval,
5350                                   1, 65535, mask,
5351                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5352                                   nla_get_u16);
5353         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5354                                   NL80211_MESH_POWER_ACTIVE,
5355                                   NL80211_MESH_POWER_MAX,
5356                                   mask, NL80211_MESHCONF_POWER_MODE,
5357                                   nla_get_u32);
5358         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5359                                   0, 65535, mask,
5360                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5361         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5362                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5363                                   nla_get_u32);
5364         if (mask_out)
5365                 *mask_out = mask;
5366
5367         return 0;
5368
5369 #undef FILL_IN_MESH_PARAM_IF_SET
5370 }
5371
5372 static int nl80211_parse_mesh_setup(struct genl_info *info,
5373                                      struct mesh_setup *setup)
5374 {
5375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5376         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5377
5378         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5379                 return -EINVAL;
5380         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5381                              info->attrs[NL80211_ATTR_MESH_SETUP],
5382                              nl80211_mesh_setup_params_policy))
5383                 return -EINVAL;
5384
5385         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5386                 setup->sync_method =
5387                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5388                  IEEE80211_SYNC_METHOD_VENDOR :
5389                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5390
5391         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5392                 setup->path_sel_proto =
5393                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5394                  IEEE80211_PATH_PROTOCOL_VENDOR :
5395                  IEEE80211_PATH_PROTOCOL_HWMP;
5396
5397         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5398                 setup->path_metric =
5399                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5400                  IEEE80211_PATH_METRIC_VENDOR :
5401                  IEEE80211_PATH_METRIC_AIRTIME;
5402
5403
5404         if (tb[NL80211_MESH_SETUP_IE]) {
5405                 struct nlattr *ieattr =
5406                         tb[NL80211_MESH_SETUP_IE];
5407                 if (!is_valid_ie_attr(ieattr))
5408                         return -EINVAL;
5409                 setup->ie = nla_data(ieattr);
5410                 setup->ie_len = nla_len(ieattr);
5411         }
5412         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5413             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5414                 return -EINVAL;
5415         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5416         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5417         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5418         if (setup->is_secure)
5419                 setup->user_mpm = true;
5420
5421         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5422                 if (!setup->user_mpm)
5423                         return -EINVAL;
5424                 setup->auth_id =
5425                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5426         }
5427
5428         return 0;
5429 }
5430
5431 static int nl80211_update_mesh_config(struct sk_buff *skb,
5432                                       struct genl_info *info)
5433 {
5434         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5435         struct net_device *dev = info->user_ptr[1];
5436         struct wireless_dev *wdev = dev->ieee80211_ptr;
5437         struct mesh_config cfg;
5438         u32 mask;
5439         int err;
5440
5441         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5442                 return -EOPNOTSUPP;
5443
5444         if (!rdev->ops->update_mesh_config)
5445                 return -EOPNOTSUPP;
5446
5447         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5448         if (err)
5449                 return err;
5450
5451         wdev_lock(wdev);
5452         if (!wdev->mesh_id_len)
5453                 err = -ENOLINK;
5454
5455         if (!err)
5456                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5457
5458         wdev_unlock(wdev);
5459
5460         return err;
5461 }
5462
5463 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5464                               struct sk_buff *msg)
5465 {
5466         struct nlattr *nl_reg_rules;
5467         unsigned int i;
5468
5469         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5470             (regdom->dfs_region &&
5471              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5472                 goto nla_put_failure;
5473
5474         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5475         if (!nl_reg_rules)
5476                 goto nla_put_failure;
5477
5478         for (i = 0; i < regdom->n_reg_rules; i++) {
5479                 struct nlattr *nl_reg_rule;
5480                 const struct ieee80211_reg_rule *reg_rule;
5481                 const struct ieee80211_freq_range *freq_range;
5482                 const struct ieee80211_power_rule *power_rule;
5483                 unsigned int max_bandwidth_khz;
5484
5485                 reg_rule = &regdom->reg_rules[i];
5486                 freq_range = &reg_rule->freq_range;
5487                 power_rule = &reg_rule->power_rule;
5488
5489                 nl_reg_rule = nla_nest_start(msg, i);
5490                 if (!nl_reg_rule)
5491                         goto nla_put_failure;
5492
5493                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5494                 if (!max_bandwidth_khz)
5495                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5496                                                                   reg_rule);
5497
5498                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5499                                 reg_rule->flags) ||
5500                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5501                                 freq_range->start_freq_khz) ||
5502                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5503                                 freq_range->end_freq_khz) ||
5504                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5505                                 max_bandwidth_khz) ||
5506                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5507                                 power_rule->max_antenna_gain) ||
5508                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5509                                 power_rule->max_eirp) ||
5510                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5511                                 reg_rule->dfs_cac_ms))
5512                         goto nla_put_failure;
5513
5514                 nla_nest_end(msg, nl_reg_rule);
5515         }
5516
5517         nla_nest_end(msg, nl_reg_rules);
5518         return 0;
5519
5520 nla_put_failure:
5521         return -EMSGSIZE;
5522 }
5523
5524 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5525 {
5526         const struct ieee80211_regdomain *regdom = NULL;
5527         struct cfg80211_registered_device *rdev;
5528         struct wiphy *wiphy = NULL;
5529         struct sk_buff *msg;
5530         void *hdr;
5531
5532         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5533         if (!msg)
5534                 return -ENOBUFS;
5535
5536         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5537                              NL80211_CMD_GET_REG);
5538         if (!hdr)
5539                 goto put_failure;
5540
5541         if (info->attrs[NL80211_ATTR_WIPHY]) {
5542                 bool self_managed;
5543
5544                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5545                 if (IS_ERR(rdev)) {
5546                         nlmsg_free(msg);
5547                         return PTR_ERR(rdev);
5548                 }
5549
5550                 wiphy = &rdev->wiphy;
5551                 self_managed = wiphy->regulatory_flags &
5552                                REGULATORY_WIPHY_SELF_MANAGED;
5553                 regdom = get_wiphy_regdom(wiphy);
5554
5555                 /* a self-managed-reg device must have a private regdom */
5556                 if (WARN_ON(!regdom && self_managed)) {
5557                         nlmsg_free(msg);
5558                         return -EINVAL;
5559                 }
5560
5561                 if (regdom &&
5562                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5563                         goto nla_put_failure;
5564         }
5565
5566         if (!wiphy && reg_last_request_cell_base() &&
5567             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5568                         NL80211_USER_REG_HINT_CELL_BASE))
5569                 goto nla_put_failure;
5570
5571         rcu_read_lock();
5572
5573         if (!regdom)
5574                 regdom = rcu_dereference(cfg80211_regdomain);
5575
5576         if (nl80211_put_regdom(regdom, msg))
5577                 goto nla_put_failure_rcu;
5578
5579         rcu_read_unlock();
5580
5581         genlmsg_end(msg, hdr);
5582         return genlmsg_reply(msg, info);
5583
5584 nla_put_failure_rcu:
5585         rcu_read_unlock();
5586 nla_put_failure:
5587         genlmsg_cancel(msg, hdr);
5588 put_failure:
5589         nlmsg_free(msg);
5590         return -EMSGSIZE;
5591 }
5592
5593 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5594                                u32 seq, int flags, struct wiphy *wiphy,
5595                                const struct ieee80211_regdomain *regdom)
5596 {
5597         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5598                                    NL80211_CMD_GET_REG);
5599
5600         if (!hdr)
5601                 return -1;
5602
5603         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5604
5605         if (nl80211_put_regdom(regdom, msg))
5606                 goto nla_put_failure;
5607
5608         if (!wiphy && reg_last_request_cell_base() &&
5609             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5610                         NL80211_USER_REG_HINT_CELL_BASE))
5611                 goto nla_put_failure;
5612
5613         if (wiphy &&
5614             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5615                 goto nla_put_failure;
5616
5617         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5618             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5619                 goto nla_put_failure;
5620
5621         genlmsg_end(msg, hdr);
5622         return 0;
5623
5624 nla_put_failure:
5625         genlmsg_cancel(msg, hdr);
5626         return -EMSGSIZE;
5627 }
5628
5629 static int nl80211_get_reg_dump(struct sk_buff *skb,
5630                                 struct netlink_callback *cb)
5631 {
5632         const struct ieee80211_regdomain *regdom = NULL;
5633         struct cfg80211_registered_device *rdev;
5634         int err, reg_idx, start = cb->args[2];
5635
5636         rtnl_lock();
5637
5638         if (cfg80211_regdomain && start == 0) {
5639                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5640                                           NLM_F_MULTI, NULL,
5641                                           rtnl_dereference(cfg80211_regdomain));
5642                 if (err < 0)
5643                         goto out_err;
5644         }
5645
5646         /* the global regdom is idx 0 */
5647         reg_idx = 1;
5648         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5649                 regdom = get_wiphy_regdom(&rdev->wiphy);
5650                 if (!regdom)
5651                         continue;
5652
5653                 if (++reg_idx <= start)
5654                         continue;
5655
5656                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5657                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5658                 if (err < 0) {
5659                         reg_idx--;
5660                         break;
5661                 }
5662         }
5663
5664         cb->args[2] = reg_idx;
5665         err = skb->len;
5666 out_err:
5667         rtnl_unlock();
5668         return err;
5669 }
5670
5671 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5672 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5673         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5674         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5675         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5676         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5677         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5678         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5679         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5680 };
5681
5682 static int parse_reg_rule(struct nlattr *tb[],
5683         struct ieee80211_reg_rule *reg_rule)
5684 {
5685         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5686         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5687
5688         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5689                 return -EINVAL;
5690         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5691                 return -EINVAL;
5692         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5693                 return -EINVAL;
5694         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5695                 return -EINVAL;
5696         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5697                 return -EINVAL;
5698
5699         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5700
5701         freq_range->start_freq_khz =
5702                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5703         freq_range->end_freq_khz =
5704                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5705         freq_range->max_bandwidth_khz =
5706                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5707
5708         power_rule->max_eirp =
5709                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5710
5711         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5712                 power_rule->max_antenna_gain =
5713                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5714
5715         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5716                 reg_rule->dfs_cac_ms =
5717                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5718
5719         return 0;
5720 }
5721
5722 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5723 {
5724         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5725         struct nlattr *nl_reg_rule;
5726         char *alpha2;
5727         int rem_reg_rules, r;
5728         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5729         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5730         struct ieee80211_regdomain *rd;
5731
5732         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5733                 return -EINVAL;
5734
5735         if (!info->attrs[NL80211_ATTR_REG_RULES])
5736                 return -EINVAL;
5737
5738         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5739
5740         if (info->attrs[NL80211_ATTR_DFS_REGION])
5741                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5742
5743         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5744                             rem_reg_rules) {
5745                 num_rules++;
5746                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5747                         return -EINVAL;
5748         }
5749
5750         if (!reg_is_valid_request(alpha2))
5751                 return -EINVAL;
5752
5753         size_of_regd = sizeof(struct ieee80211_regdomain) +
5754                        num_rules * sizeof(struct ieee80211_reg_rule);
5755
5756         rd = kzalloc(size_of_regd, GFP_KERNEL);
5757         if (!rd)
5758                 return -ENOMEM;
5759
5760         rd->n_reg_rules = num_rules;
5761         rd->alpha2[0] = alpha2[0];
5762         rd->alpha2[1] = alpha2[1];
5763
5764         /*
5765          * Disable DFS master mode if the DFS region was
5766          * not supported or known on this kernel.
5767          */
5768         if (reg_supported_dfs_region(dfs_region))
5769                 rd->dfs_region = dfs_region;
5770
5771         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5772                             rem_reg_rules) {
5773                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5774                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5775                               reg_rule_policy);
5776                 if (r)
5777                         goto bad_reg;
5778                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5779                 if (r)
5780                         goto bad_reg;
5781
5782                 rule_idx++;
5783
5784                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5785                         r = -EINVAL;
5786                         goto bad_reg;
5787                 }
5788         }
5789
5790         r = set_regdom(rd, REGD_SOURCE_CRDA);
5791         /* set_regdom took ownership */
5792         rd = NULL;
5793
5794  bad_reg:
5795         kfree(rd);
5796         return r;
5797 }
5798 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5799
5800 static int validate_scan_freqs(struct nlattr *freqs)
5801 {
5802         struct nlattr *attr1, *attr2;
5803         int n_channels = 0, tmp1, tmp2;
5804
5805         nla_for_each_nested(attr1, freqs, tmp1) {
5806                 n_channels++;
5807                 /*
5808                  * Some hardware has a limited channel list for
5809                  * scanning, and it is pretty much nonsensical
5810                  * to scan for a channel twice, so disallow that
5811                  * and don't require drivers to check that the
5812                  * channel list they get isn't longer than what
5813                  * they can scan, as long as they can scan all
5814                  * the channels they registered at once.
5815                  */
5816                 nla_for_each_nested(attr2, freqs, tmp2)
5817                         if (attr1 != attr2 &&
5818                             nla_get_u32(attr1) == nla_get_u32(attr2))
5819                                 return 0;
5820         }
5821
5822         return n_channels;
5823 }
5824
5825 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5826 {
5827         return b < NUM_NL80211_BANDS && wiphy->bands[b];
5828 }
5829
5830 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5831                             struct cfg80211_bss_selection *bss_select)
5832 {
5833         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5834         struct nlattr *nest;
5835         int err;
5836         bool found = false;
5837         int i;
5838
5839         /* only process one nested attribute */
5840         nest = nla_data(nla);
5841         if (!nla_ok(nest, nla_len(nest)))
5842                 return -EINVAL;
5843
5844         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
5845                         nla_len(nest), nl80211_bss_select_policy);
5846         if (err)
5847                 return err;
5848
5849         /* only one attribute may be given */
5850         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
5851                 if (attr[i]) {
5852                         if (found)
5853                                 return -EINVAL;
5854                         found = true;
5855                 }
5856         }
5857
5858         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
5859
5860         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
5861                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
5862
5863         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
5864                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
5865                 bss_select->param.band_pref =
5866                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
5867                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
5868                         return -EINVAL;
5869         }
5870
5871         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
5872                 struct nl80211_bss_select_rssi_adjust *adj_param;
5873
5874                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
5875                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
5876                 bss_select->param.adjust.band = adj_param->band;
5877                 bss_select->param.adjust.delta = adj_param->delta;
5878                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
5879                         return -EINVAL;
5880         }
5881
5882         /* user-space did not provide behaviour attribute */
5883         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
5884                 return -EINVAL;
5885
5886         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
5887                 return -EINVAL;
5888
5889         return 0;
5890 }
5891
5892 static int nl80211_parse_random_mac(struct nlattr **attrs,
5893                                     u8 *mac_addr, u8 *mac_addr_mask)
5894 {
5895         int i;
5896
5897         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5898                 eth_zero_addr(mac_addr);
5899                 eth_zero_addr(mac_addr_mask);
5900                 mac_addr[0] = 0x2;
5901                 mac_addr_mask[0] = 0x3;
5902
5903                 return 0;
5904         }
5905
5906         /* need both or none */
5907         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5908                 return -EINVAL;
5909
5910         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5911         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5912
5913         /* don't allow or configure an mcast address */
5914         if (!is_multicast_ether_addr(mac_addr_mask) ||
5915             is_multicast_ether_addr(mac_addr))
5916                 return -EINVAL;
5917
5918         /*
5919          * allow users to pass a MAC address that has bits set outside
5920          * of the mask, but don't bother drivers with having to deal
5921          * with such bits
5922          */
5923         for (i = 0; i < ETH_ALEN; i++)
5924                 mac_addr[i] &= mac_addr_mask[i];
5925
5926         return 0;
5927 }
5928
5929 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5930 {
5931         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5932         struct wireless_dev *wdev = info->user_ptr[1];
5933         struct cfg80211_scan_request *request;
5934         struct nlattr *attr;
5935         struct wiphy *wiphy;
5936         int err, tmp, n_ssids = 0, n_channels, i;
5937         size_t ie_len;
5938
5939         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5940                 return -EINVAL;
5941
5942         wiphy = &rdev->wiphy;
5943
5944         if (!rdev->ops->scan)
5945                 return -EOPNOTSUPP;
5946
5947         if (rdev->scan_req || rdev->scan_msg) {
5948                 err = -EBUSY;
5949                 goto unlock;
5950         }
5951
5952         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5953                 n_channels = validate_scan_freqs(
5954                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5955                 if (!n_channels) {
5956                         err = -EINVAL;
5957                         goto unlock;
5958                 }
5959         } else {
5960                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5961         }
5962
5963         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5964                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5965                         n_ssids++;
5966
5967         if (n_ssids > wiphy->max_scan_ssids) {
5968                 err = -EINVAL;
5969                 goto unlock;
5970         }
5971
5972         if (info->attrs[NL80211_ATTR_IE])
5973                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5974         else
5975                 ie_len = 0;
5976
5977         if (ie_len > wiphy->max_scan_ie_len) {
5978                 err = -EINVAL;
5979                 goto unlock;
5980         }
5981
5982         request = kzalloc(sizeof(*request)
5983                         + sizeof(*request->ssids) * n_ssids
5984                         + sizeof(*request->channels) * n_channels
5985                         + ie_len, GFP_KERNEL);
5986         if (!request) {
5987                 err = -ENOMEM;
5988                 goto unlock;
5989         }
5990
5991         if (n_ssids)
5992                 request->ssids = (void *)&request->channels[n_channels];
5993         request->n_ssids = n_ssids;
5994         if (ie_len) {
5995                 if (n_ssids)
5996                         request->ie = (void *)(request->ssids + n_ssids);
5997                 else
5998                         request->ie = (void *)(request->channels + n_channels);
5999         }
6000
6001         i = 0;
6002         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6003                 /* user specified, bail out if channel not found */
6004                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6005                         struct ieee80211_channel *chan;
6006
6007                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6008
6009                         if (!chan) {
6010                                 err = -EINVAL;
6011                                 goto out_free;
6012                         }
6013
6014                         /* ignore disabled channels */
6015                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6016                                 continue;
6017
6018                         request->channels[i] = chan;
6019                         i++;
6020                 }
6021         } else {
6022                 enum nl80211_band band;
6023
6024                 /* all channels */
6025                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6026                         int j;
6027                         if (!wiphy->bands[band])
6028                                 continue;
6029                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6030                                 struct ieee80211_channel *chan;
6031
6032                                 chan = &wiphy->bands[band]->channels[j];
6033
6034                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6035                                         continue;
6036
6037                                 request->channels[i] = chan;
6038                                 i++;
6039                         }
6040                 }
6041         }
6042
6043         if (!i) {
6044                 err = -EINVAL;
6045                 goto out_free;
6046         }
6047
6048         request->n_channels = i;
6049
6050         i = 0;
6051         if (n_ssids) {
6052                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6053                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6054                                 err = -EINVAL;
6055                                 goto out_free;
6056                         }
6057                         request->ssids[i].ssid_len = nla_len(attr);
6058                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6059                         i++;
6060                 }
6061         }
6062
6063         if (info->attrs[NL80211_ATTR_IE]) {
6064                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6065                 memcpy((void *)request->ie,
6066                        nla_data(info->attrs[NL80211_ATTR_IE]),
6067                        request->ie_len);
6068         }
6069
6070         for (i = 0; i < NUM_NL80211_BANDS; i++)
6071                 if (wiphy->bands[i])
6072                         request->rates[i] =
6073                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6074
6075         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6076                 nla_for_each_nested(attr,
6077                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6078                                     tmp) {
6079                         enum nl80211_band band = nla_type(attr);
6080
6081                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6082                                 err = -EINVAL;
6083                                 goto out_free;
6084                         }
6085
6086                         if (!wiphy->bands[band])
6087                                 continue;
6088
6089                         err = ieee80211_get_ratemask(wiphy->bands[band],
6090                                                      nla_data(attr),
6091                                                      nla_len(attr),
6092                                                      &request->rates[band]);
6093                         if (err)
6094                                 goto out_free;
6095                 }
6096         }
6097
6098         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6099                 request->flags = nla_get_u32(
6100                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6101                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6102                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6103                         err = -EOPNOTSUPP;
6104                         goto out_free;
6105                 }
6106
6107                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6108                         if (!(wiphy->features &
6109                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6110                                 err = -EOPNOTSUPP;
6111                                 goto out_free;
6112                         }
6113
6114                         if (wdev->current_bss) {
6115                                 err = -EOPNOTSUPP;
6116                                 goto out_free;
6117                         }
6118
6119                         err = nl80211_parse_random_mac(info->attrs,
6120                                                        request->mac_addr,
6121                                                        request->mac_addr_mask);
6122                         if (err)
6123                                 goto out_free;
6124                 }
6125         }
6126
6127         request->no_cck =
6128                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6129
6130         if (info->attrs[NL80211_ATTR_MAC])
6131                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6132                        ETH_ALEN);
6133         else
6134                 eth_broadcast_addr(request->bssid);
6135
6136         request->wdev = wdev;
6137         request->wiphy = &rdev->wiphy;
6138         request->scan_start = jiffies;
6139
6140         rdev->scan_req = request;
6141         err = rdev_scan(rdev, request);
6142
6143         if (!err) {
6144                 nl80211_send_scan_start(rdev, wdev);
6145                 if (wdev->netdev)
6146                         dev_hold(wdev->netdev);
6147         } else {
6148  out_free:
6149                 rdev->scan_req = NULL;
6150                 kfree(request);
6151         }
6152
6153  unlock:
6154         return err;
6155 }
6156
6157 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6158 {
6159         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6160         struct wireless_dev *wdev = info->user_ptr[1];
6161
6162         if (!rdev->ops->abort_scan)
6163                 return -EOPNOTSUPP;
6164
6165         if (rdev->scan_msg)
6166                 return 0;
6167
6168         if (!rdev->scan_req)
6169                 return -ENOENT;
6170
6171         rdev_abort_scan(rdev, wdev);
6172         return 0;
6173 }
6174
6175 static int
6176 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6177                                struct cfg80211_sched_scan_request *request,
6178                                struct nlattr **attrs)
6179 {
6180         int tmp, err, i = 0;
6181         struct nlattr *attr;
6182
6183         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6184                 u32 interval;
6185
6186                 /*
6187                  * If scan plans are not specified,
6188                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6189                  * case one scan plan will be set with the specified scan
6190                  * interval and infinite number of iterations.
6191                  */
6192                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6193                         return -EINVAL;
6194
6195                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6196                 if (!interval)
6197                         return -EINVAL;
6198
6199                 request->scan_plans[0].interval =
6200                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6201                 if (!request->scan_plans[0].interval)
6202                         return -EINVAL;
6203
6204                 if (request->scan_plans[0].interval >
6205                     wiphy->max_sched_scan_plan_interval)
6206                         request->scan_plans[0].interval =
6207                                 wiphy->max_sched_scan_plan_interval;
6208
6209                 return 0;
6210         }
6211
6212         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6213                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6214
6215                 if (WARN_ON(i >= n_plans))
6216                         return -EINVAL;
6217
6218                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6219                                 nla_data(attr), nla_len(attr),
6220                                 nl80211_plan_policy);
6221                 if (err)
6222                         return err;
6223
6224                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6225                         return -EINVAL;
6226
6227                 request->scan_plans[i].interval =
6228                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6229                 if (!request->scan_plans[i].interval ||
6230                     request->scan_plans[i].interval >
6231                     wiphy->max_sched_scan_plan_interval)
6232                         return -EINVAL;
6233
6234                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6235                         request->scan_plans[i].iterations =
6236                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6237                         if (!request->scan_plans[i].iterations ||
6238                             (request->scan_plans[i].iterations >
6239                              wiphy->max_sched_scan_plan_iterations))
6240                                 return -EINVAL;
6241                 } else if (i < n_plans - 1) {
6242                         /*
6243                          * All scan plans but the last one must specify
6244                          * a finite number of iterations
6245                          */
6246                         return -EINVAL;
6247                 }
6248
6249                 i++;
6250         }
6251
6252         /*
6253          * The last scan plan must not specify the number of
6254          * iterations, it is supposed to run infinitely
6255          */
6256         if (request->scan_plans[n_plans - 1].iterations)
6257                 return  -EINVAL;
6258
6259         return 0;
6260 }
6261
6262 static struct cfg80211_sched_scan_request *
6263 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6264                          struct nlattr **attrs)
6265 {
6266         struct cfg80211_sched_scan_request *request;
6267         struct nlattr *attr;
6268         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6269         enum nl80211_band band;
6270         size_t ie_len;
6271         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6272         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6273
6274         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6275                 return ERR_PTR(-EINVAL);
6276
6277         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6278                 n_channels = validate_scan_freqs(
6279                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6280                 if (!n_channels)
6281                         return ERR_PTR(-EINVAL);
6282         } else {
6283                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6284         }
6285
6286         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6287                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6288                                     tmp)
6289                         n_ssids++;
6290
6291         if (n_ssids > wiphy->max_sched_scan_ssids)
6292                 return ERR_PTR(-EINVAL);
6293
6294         /*
6295          * First, count the number of 'real' matchsets. Due to an issue with
6296          * the old implementation, matchsets containing only the RSSI attribute
6297          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6298          * RSSI for all matchsets, rather than their own matchset for reporting
6299          * all APs with a strong RSSI. This is needed to be compatible with
6300          * older userspace that treated a matchset with only the RSSI as the
6301          * global RSSI for all other matchsets - if there are other matchsets.
6302          */
6303         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6304                 nla_for_each_nested(attr,
6305                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6306                                     tmp) {
6307                         struct nlattr *rssi;
6308
6309                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6310                                         nla_data(attr), nla_len(attr),
6311                                         nl80211_match_policy);
6312                         if (err)
6313                                 return ERR_PTR(err);
6314                         /* add other standalone attributes here */
6315                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6316                                 n_match_sets++;
6317                                 continue;
6318                         }
6319                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6320                         if (rssi)
6321                                 default_match_rssi = nla_get_s32(rssi);
6322                 }
6323         }
6324
6325         /* However, if there's no other matchset, add the RSSI one */
6326         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6327                 n_match_sets = 1;
6328
6329         if (n_match_sets > wiphy->max_match_sets)
6330                 return ERR_PTR(-EINVAL);
6331
6332         if (attrs[NL80211_ATTR_IE])
6333                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6334         else
6335                 ie_len = 0;
6336
6337         if (ie_len > wiphy->max_sched_scan_ie_len)
6338                 return ERR_PTR(-EINVAL);
6339
6340         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6341                 /*
6342                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6343                  * each scan plan already specifies its own interval
6344                  */
6345                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6346                         return ERR_PTR(-EINVAL);
6347
6348                 nla_for_each_nested(attr,
6349                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6350                         n_plans++;
6351         } else {
6352                 /*
6353                  * The scan interval attribute is kept for backward
6354                  * compatibility. If no scan plans are specified and sched scan
6355                  * interval is specified, one scan plan will be set with this
6356                  * scan interval and infinite number of iterations.
6357                  */
6358                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6359                         return ERR_PTR(-EINVAL);
6360
6361                 n_plans = 1;
6362         }
6363
6364         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6365                 return ERR_PTR(-EINVAL);
6366
6367         request = kzalloc(sizeof(*request)
6368                         + sizeof(*request->ssids) * n_ssids
6369                         + sizeof(*request->match_sets) * n_match_sets
6370                         + sizeof(*request->scan_plans) * n_plans
6371                         + sizeof(*request->channels) * n_channels
6372                         + ie_len, GFP_KERNEL);
6373         if (!request)
6374                 return ERR_PTR(-ENOMEM);
6375
6376         if (n_ssids)
6377                 request->ssids = (void *)&request->channels[n_channels];
6378         request->n_ssids = n_ssids;
6379         if (ie_len) {
6380                 if (n_ssids)
6381                         request->ie = (void *)(request->ssids + n_ssids);
6382                 else
6383                         request->ie = (void *)(request->channels + n_channels);
6384         }
6385
6386         if (n_match_sets) {
6387                 if (request->ie)
6388                         request->match_sets = (void *)(request->ie + ie_len);
6389                 else if (n_ssids)
6390                         request->match_sets =
6391                                 (void *)(request->ssids + n_ssids);
6392                 else
6393                         request->match_sets =
6394                                 (void *)(request->channels + n_channels);
6395         }
6396         request->n_match_sets = n_match_sets;
6397
6398         if (n_match_sets)
6399                 request->scan_plans = (void *)(request->match_sets +
6400                                                n_match_sets);
6401         else if (request->ie)
6402                 request->scan_plans = (void *)(request->ie + ie_len);
6403         else if (n_ssids)
6404                 request->scan_plans = (void *)(request->ssids + n_ssids);
6405         else
6406                 request->scan_plans = (void *)(request->channels + n_channels);
6407
6408         request->n_scan_plans = n_plans;
6409
6410         i = 0;
6411         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6412                 /* user specified, bail out if channel not found */
6413                 nla_for_each_nested(attr,
6414                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6415                                     tmp) {
6416                         struct ieee80211_channel *chan;
6417
6418                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6419
6420                         if (!chan) {
6421                                 err = -EINVAL;
6422                                 goto out_free;
6423                         }
6424
6425                         /* ignore disabled channels */
6426                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6427                                 continue;
6428
6429                         request->channels[i] = chan;
6430                         i++;
6431                 }
6432         } else {
6433                 /* all channels */
6434                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6435                         int j;
6436                         if (!wiphy->bands[band])
6437                                 continue;
6438                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6439                                 struct ieee80211_channel *chan;
6440
6441                                 chan = &wiphy->bands[band]->channels[j];
6442
6443                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6444                                         continue;
6445
6446                                 request->channels[i] = chan;
6447                                 i++;
6448                         }
6449                 }
6450         }
6451
6452         if (!i) {
6453                 err = -EINVAL;
6454                 goto out_free;
6455         }
6456
6457         request->n_channels = i;
6458
6459         i = 0;
6460         if (n_ssids) {
6461                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6462                                     tmp) {
6463                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6464                                 err = -EINVAL;
6465                                 goto out_free;
6466                         }
6467                         request->ssids[i].ssid_len = nla_len(attr);
6468                         memcpy(request->ssids[i].ssid, nla_data(attr),
6469                                nla_len(attr));
6470                         i++;
6471                 }
6472         }
6473
6474         i = 0;
6475         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6476                 nla_for_each_nested(attr,
6477                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6478                                     tmp) {
6479                         struct nlattr *ssid, *rssi;
6480
6481                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6482                                         nla_data(attr), nla_len(attr),
6483                                         nl80211_match_policy);
6484                         if (err)
6485                                 goto out_free;
6486                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6487                         if (ssid) {
6488                                 if (WARN_ON(i >= n_match_sets)) {
6489                                         /* this indicates a programming error,
6490                                          * the loop above should have verified
6491                                          * things properly
6492                                          */
6493                                         err = -EINVAL;
6494                                         goto out_free;
6495                                 }
6496
6497                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6498                                         err = -EINVAL;
6499                                         goto out_free;
6500                                 }
6501                                 memcpy(request->match_sets[i].ssid.ssid,
6502                                        nla_data(ssid), nla_len(ssid));
6503                                 request->match_sets[i].ssid.ssid_len =
6504                                         nla_len(ssid);
6505                                 /* special attribute - old implemenation w/a */
6506                                 request->match_sets[i].rssi_thold =
6507                                         default_match_rssi;
6508                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6509                                 if (rssi)
6510                                         request->match_sets[i].rssi_thold =
6511                                                 nla_get_s32(rssi);
6512                         }
6513                         i++;
6514                 }
6515
6516                 /* there was no other matchset, so the RSSI one is alone */
6517                 if (i == 0 && n_match_sets)
6518                         request->match_sets[0].rssi_thold = default_match_rssi;
6519
6520                 request->min_rssi_thold = INT_MAX;
6521                 for (i = 0; i < n_match_sets; i++)
6522                         request->min_rssi_thold =
6523                                 min(request->match_sets[i].rssi_thold,
6524                                     request->min_rssi_thold);
6525         } else {
6526                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6527         }
6528
6529         if (ie_len) {
6530                 request->ie_len = ie_len;
6531                 memcpy((void *)request->ie,
6532                        nla_data(attrs[NL80211_ATTR_IE]),
6533                        request->ie_len);
6534         }
6535
6536         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6537                 request->flags = nla_get_u32(
6538                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6539                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6540                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6541                         err = -EOPNOTSUPP;
6542                         goto out_free;
6543                 }
6544
6545                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6546                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6547
6548                         if (!wdev) /* must be net-detect */
6549                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6550
6551                         if (!(wiphy->features & flg)) {
6552                                 err = -EOPNOTSUPP;
6553                                 goto out_free;
6554                         }
6555
6556                         if (wdev && wdev->current_bss) {
6557                                 err = -EOPNOTSUPP;
6558                                 goto out_free;
6559                         }
6560
6561                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6562                                                        request->mac_addr_mask);
6563                         if (err)
6564                                 goto out_free;
6565                 }
6566         }
6567
6568         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6569                 request->delay =
6570                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6571
6572         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6573         if (err)
6574                 goto out_free;
6575
6576         request->scan_start = jiffies;
6577
6578         return request;
6579
6580 out_free:
6581         kfree(request);
6582         return ERR_PTR(err);
6583 }
6584
6585 static int nl80211_start_sched_scan(struct sk_buff *skb,
6586                                     struct genl_info *info)
6587 {
6588         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6589         struct net_device *dev = info->user_ptr[1];
6590         struct wireless_dev *wdev = dev->ieee80211_ptr;
6591         struct cfg80211_sched_scan_request *sched_scan_req;
6592         int err;
6593
6594         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6595             !rdev->ops->sched_scan_start)
6596                 return -EOPNOTSUPP;
6597
6598         if (rdev->sched_scan_req)
6599                 return -EINPROGRESS;
6600
6601         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6602                                                   info->attrs);
6603
6604         err = PTR_ERR_OR_ZERO(sched_scan_req);
6605         if (err)
6606                 goto out_err;
6607
6608         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6609         if (err)
6610                 goto out_free;
6611
6612         sched_scan_req->dev = dev;
6613         sched_scan_req->wiphy = &rdev->wiphy;
6614
6615         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6616                 sched_scan_req->owner_nlportid = info->snd_portid;
6617
6618         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6619
6620         nl80211_send_sched_scan(rdev, dev,
6621                                 NL80211_CMD_START_SCHED_SCAN);
6622         return 0;
6623
6624 out_free:
6625         kfree(sched_scan_req);
6626 out_err:
6627         return err;
6628 }
6629
6630 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6631                                    struct genl_info *info)
6632 {
6633         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6634
6635         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6636             !rdev->ops->sched_scan_stop)
6637                 return -EOPNOTSUPP;
6638
6639         return __cfg80211_stop_sched_scan(rdev, false);
6640 }
6641
6642 static int nl80211_start_radar_detection(struct sk_buff *skb,
6643                                          struct genl_info *info)
6644 {
6645         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6646         struct net_device *dev = info->user_ptr[1];
6647         struct wireless_dev *wdev = dev->ieee80211_ptr;
6648         struct cfg80211_chan_def chandef;
6649         enum nl80211_dfs_regions dfs_region;
6650         unsigned int cac_time_ms;
6651         int err;
6652
6653         dfs_region = reg_get_dfs_region(wdev->wiphy);
6654         if (dfs_region == NL80211_DFS_UNSET)
6655                 return -EINVAL;
6656
6657         err = nl80211_parse_chandef(rdev, info, &chandef);
6658         if (err)
6659                 return err;
6660
6661         if (netif_carrier_ok(dev))
6662                 return -EBUSY;
6663
6664         if (wdev->cac_started)
6665                 return -EBUSY;
6666
6667         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6668                                             wdev->iftype);
6669         if (err < 0)
6670                 return err;
6671
6672         if (err == 0)
6673                 return -EINVAL;
6674
6675         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6676                 return -EINVAL;
6677
6678         if (!rdev->ops->start_radar_detection)
6679                 return -EOPNOTSUPP;
6680
6681         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6682         if (WARN_ON(!cac_time_ms))
6683                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6684
6685         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6686         if (!err) {
6687                 wdev->chandef = chandef;
6688                 wdev->cac_started = true;
6689                 wdev->cac_start_time = jiffies;
6690                 wdev->cac_time_ms = cac_time_ms;
6691         }
6692         return err;
6693 }
6694
6695 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6696 {
6697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6698         struct net_device *dev = info->user_ptr[1];
6699         struct wireless_dev *wdev = dev->ieee80211_ptr;
6700         struct cfg80211_csa_settings params;
6701         /* csa_attrs is defined static to avoid waste of stack size - this
6702          * function is called under RTNL lock, so this should not be a problem.
6703          */
6704         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6705         int err;
6706         bool need_new_beacon = false;
6707         int len, i;
6708         u32 cs_count;
6709
6710         if (!rdev->ops->channel_switch ||
6711             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6712                 return -EOPNOTSUPP;
6713
6714         switch (dev->ieee80211_ptr->iftype) {
6715         case NL80211_IFTYPE_AP:
6716         case NL80211_IFTYPE_P2P_GO:
6717                 need_new_beacon = true;
6718
6719                 /* useless if AP is not running */
6720                 if (!wdev->beacon_interval)
6721                         return -ENOTCONN;
6722                 break;
6723         case NL80211_IFTYPE_ADHOC:
6724                 if (!wdev->ssid_len)
6725                         return -ENOTCONN;
6726                 break;
6727         case NL80211_IFTYPE_MESH_POINT:
6728                 if (!wdev->mesh_id_len)
6729                         return -ENOTCONN;
6730                 break;
6731         default:
6732                 return -EOPNOTSUPP;
6733         }
6734
6735         memset(&params, 0, sizeof(params));
6736
6737         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6738             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6739                 return -EINVAL;
6740
6741         /* only important for AP, IBSS and mesh create IEs internally */
6742         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6743                 return -EINVAL;
6744
6745         /* Even though the attribute is u32, the specification says
6746          * u8, so let's make sure we don't overflow.
6747          */
6748         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6749         if (cs_count > 255)
6750                 return -EINVAL;
6751
6752         params.count = cs_count;
6753
6754         if (!need_new_beacon)
6755                 goto skip_beacons;
6756
6757         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6758         if (err)
6759                 return err;
6760
6761         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6762                                info->attrs[NL80211_ATTR_CSA_IES],
6763                                nl80211_policy);
6764         if (err)
6765                 return err;
6766
6767         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6768         if (err)
6769                 return err;
6770
6771         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6772                 return -EINVAL;
6773
6774         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6775         if (!len || (len % sizeof(u16)))
6776                 return -EINVAL;
6777
6778         params.n_counter_offsets_beacon = len / sizeof(u16);
6779         if (rdev->wiphy.max_num_csa_counters &&
6780             (params.n_counter_offsets_beacon >
6781              rdev->wiphy.max_num_csa_counters))
6782                 return -EINVAL;
6783
6784         params.counter_offsets_beacon =
6785                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6786
6787         /* sanity checks - counters should fit and be the same */
6788         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6789                 u16 offset = params.counter_offsets_beacon[i];
6790
6791                 if (offset >= params.beacon_csa.tail_len)
6792                         return -EINVAL;
6793
6794                 if (params.beacon_csa.tail[offset] != params.count)
6795                         return -EINVAL;
6796         }
6797
6798         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6799                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6800                 if (!len || (len % sizeof(u16)))
6801                         return -EINVAL;
6802
6803                 params.n_counter_offsets_presp = len / sizeof(u16);
6804                 if (rdev->wiphy.max_num_csa_counters &&
6805                     (params.n_counter_offsets_beacon >
6806                      rdev->wiphy.max_num_csa_counters))
6807                         return -EINVAL;
6808
6809                 params.counter_offsets_presp =
6810                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6811
6812                 /* sanity checks - counters should fit and be the same */
6813                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6814                         u16 offset = params.counter_offsets_presp[i];
6815
6816                         if (offset >= params.beacon_csa.probe_resp_len)
6817                                 return -EINVAL;
6818
6819                         if (params.beacon_csa.probe_resp[offset] !=
6820                             params.count)
6821                                 return -EINVAL;
6822                 }
6823         }
6824
6825 skip_beacons:
6826         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6827         if (err)
6828                 return err;
6829
6830         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6831                                            wdev->iftype))
6832                 return -EINVAL;
6833
6834         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6835                                             &params.chandef,
6836                                             wdev->iftype);
6837         if (err < 0)
6838                 return err;
6839
6840         if (err > 0)
6841                 params.radar_required = true;
6842
6843         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6844                 params.block_tx = true;
6845
6846         wdev_lock(wdev);
6847         err = rdev_channel_switch(rdev, dev, &params);
6848         wdev_unlock(wdev);
6849
6850         return err;
6851 }
6852
6853 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6854                             u32 seq, int flags,
6855                             struct cfg80211_registered_device *rdev,
6856                             struct wireless_dev *wdev,
6857                             struct cfg80211_internal_bss *intbss)
6858 {
6859         struct cfg80211_bss *res = &intbss->pub;
6860         const struct cfg80211_bss_ies *ies;
6861         void *hdr;
6862         struct nlattr *bss;
6863
6864         ASSERT_WDEV_LOCK(wdev);
6865
6866         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6867                              NL80211_CMD_NEW_SCAN_RESULTS);
6868         if (!hdr)
6869                 return -1;
6870
6871         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6872
6873         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6874                 goto nla_put_failure;
6875         if (wdev->netdev &&
6876             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6877                 goto nla_put_failure;
6878         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
6879                               NL80211_ATTR_PAD))
6880                 goto nla_put_failure;
6881
6882         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6883         if (!bss)
6884                 goto nla_put_failure;
6885         if ((!is_zero_ether_addr(res->bssid) &&
6886              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6887                 goto nla_put_failure;
6888
6889         rcu_read_lock();
6890         /* indicate whether we have probe response data or not */
6891         if (rcu_access_pointer(res->proberesp_ies) &&
6892             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6893                 goto fail_unlock_rcu;
6894
6895         /* this pointer prefers to be pointed to probe response data
6896          * but is always valid
6897          */
6898         ies = rcu_dereference(res->ies);
6899         if (ies) {
6900                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
6901                                       NL80211_BSS_PAD))
6902                         goto fail_unlock_rcu;
6903                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6904                                         ies->len, ies->data))
6905                         goto fail_unlock_rcu;
6906         }
6907
6908         /* and this pointer is always (unless driver didn't know) beacon data */
6909         ies = rcu_dereference(res->beacon_ies);
6910         if (ies && ies->from_beacon) {
6911                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
6912                                       NL80211_BSS_PAD))
6913                         goto fail_unlock_rcu;
6914                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6915                                         ies->len, ies->data))
6916                         goto fail_unlock_rcu;
6917         }
6918         rcu_read_unlock();
6919
6920         if (res->beacon_interval &&
6921             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6922                 goto nla_put_failure;
6923         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6924             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6925             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6926             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6927                         jiffies_to_msecs(jiffies - intbss->ts)))
6928                 goto nla_put_failure;
6929
6930         if (intbss->ts_boottime &&
6931             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6932                               intbss->ts_boottime, NL80211_BSS_PAD))
6933                 goto nla_put_failure;
6934
6935         switch (rdev->wiphy.signal_type) {
6936         case CFG80211_SIGNAL_TYPE_MBM:
6937                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6938                         goto nla_put_failure;
6939                 break;
6940         case CFG80211_SIGNAL_TYPE_UNSPEC:
6941                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6942                         goto nla_put_failure;
6943                 break;
6944         default:
6945                 break;
6946         }
6947
6948         switch (wdev->iftype) {
6949         case NL80211_IFTYPE_P2P_CLIENT:
6950         case NL80211_IFTYPE_STATION:
6951                 if (intbss == wdev->current_bss &&
6952                     nla_put_u32(msg, NL80211_BSS_STATUS,
6953                                 NL80211_BSS_STATUS_ASSOCIATED))
6954                         goto nla_put_failure;
6955                 break;
6956         case NL80211_IFTYPE_ADHOC:
6957                 if (intbss == wdev->current_bss &&
6958                     nla_put_u32(msg, NL80211_BSS_STATUS,
6959                                 NL80211_BSS_STATUS_IBSS_JOINED))
6960                         goto nla_put_failure;
6961                 break;
6962         default:
6963                 break;
6964         }
6965
6966         nla_nest_end(msg, bss);
6967
6968         genlmsg_end(msg, hdr);
6969         return 0;
6970
6971  fail_unlock_rcu:
6972         rcu_read_unlock();
6973  nla_put_failure:
6974         genlmsg_cancel(msg, hdr);
6975         return -EMSGSIZE;
6976 }
6977
6978 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6979 {
6980         struct cfg80211_registered_device *rdev;
6981         struct cfg80211_internal_bss *scan;
6982         struct wireless_dev *wdev;
6983         int start = cb->args[2], idx = 0;
6984         int err;
6985
6986         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6987         if (err)
6988                 return err;
6989
6990         wdev_lock(wdev);
6991         spin_lock_bh(&rdev->bss_lock);
6992         cfg80211_bss_expire(rdev);
6993
6994         cb->seq = rdev->bss_generation;
6995
6996         list_for_each_entry(scan, &rdev->bss_list, list) {
6997                 if (++idx <= start)
6998                         continue;
6999                 if (nl80211_send_bss(skb, cb,
7000                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7001                                 rdev, wdev, scan) < 0) {
7002                         idx--;
7003                         break;
7004                 }
7005         }
7006
7007         spin_unlock_bh(&rdev->bss_lock);
7008         wdev_unlock(wdev);
7009
7010         cb->args[2] = idx;
7011         nl80211_finish_wdev_dump(rdev);
7012
7013         return skb->len;
7014 }
7015
7016 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7017                                int flags, struct net_device *dev,
7018                                bool allow_radio_stats,
7019                                struct survey_info *survey)
7020 {
7021         void *hdr;
7022         struct nlattr *infoattr;
7023
7024         /* skip radio stats if userspace didn't request them */
7025         if (!survey->channel && !allow_radio_stats)
7026                 return 0;
7027
7028         hdr = nl80211hdr_put(msg, portid, seq, flags,
7029                              NL80211_CMD_NEW_SURVEY_RESULTS);
7030         if (!hdr)
7031                 return -ENOMEM;
7032
7033         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7034                 goto nla_put_failure;
7035
7036         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7037         if (!infoattr)
7038                 goto nla_put_failure;
7039
7040         if (survey->channel &&
7041             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7042                         survey->channel->center_freq))
7043                 goto nla_put_failure;
7044
7045         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7046             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7047                 goto nla_put_failure;
7048         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7049             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7050                 goto nla_put_failure;
7051         if ((survey->filled & SURVEY_INFO_TIME) &&
7052             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7053                         survey->time, NL80211_SURVEY_INFO_PAD))
7054                 goto nla_put_failure;
7055         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7056             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7057                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7058                 goto nla_put_failure;
7059         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7060             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7061                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7062                 goto nla_put_failure;
7063         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7064             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7065                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7066                 goto nla_put_failure;
7067         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7068             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7069                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7070                 goto nla_put_failure;
7071         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7072             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7073                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7074                 goto nla_put_failure;
7075
7076         nla_nest_end(msg, infoattr);
7077
7078         genlmsg_end(msg, hdr);
7079         return 0;
7080
7081  nla_put_failure:
7082         genlmsg_cancel(msg, hdr);
7083         return -EMSGSIZE;
7084 }
7085
7086 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7087 {
7088         struct survey_info survey;
7089         struct cfg80211_registered_device *rdev;
7090         struct wireless_dev *wdev;
7091         int survey_idx = cb->args[2];
7092         int res;
7093         bool radio_stats;
7094
7095         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7096         if (res)
7097                 return res;
7098
7099         /* prepare_wdev_dump parsed the attributes */
7100         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7101
7102         if (!wdev->netdev) {
7103                 res = -EINVAL;
7104                 goto out_err;
7105         }
7106
7107         if (!rdev->ops->dump_survey) {
7108                 res = -EOPNOTSUPP;
7109                 goto out_err;
7110         }
7111
7112         while (1) {
7113                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7114                 if (res == -ENOENT)
7115                         break;
7116                 if (res)
7117                         goto out_err;
7118
7119                 /* don't send disabled channels, but do send non-channel data */
7120                 if (survey.channel &&
7121                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7122                         survey_idx++;
7123                         continue;
7124                 }
7125
7126                 if (nl80211_send_survey(skb,
7127                                 NETLINK_CB(cb->skb).portid,
7128                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7129                                 wdev->netdev, radio_stats, &survey) < 0)
7130                         goto out;
7131                 survey_idx++;
7132         }
7133
7134  out:
7135         cb->args[2] = survey_idx;
7136         res = skb->len;
7137  out_err:
7138         nl80211_finish_wdev_dump(rdev);
7139         return res;
7140 }
7141
7142 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7143 {
7144         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7145                                   NL80211_WPA_VERSION_2));
7146 }
7147
7148 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7149 {
7150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7151         struct net_device *dev = info->user_ptr[1];
7152         struct ieee80211_channel *chan;
7153         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7154         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7155         enum nl80211_auth_type auth_type;
7156         struct key_parse key;
7157         bool local_state_change;
7158
7159         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7160                 return -EINVAL;
7161
7162         if (!info->attrs[NL80211_ATTR_MAC])
7163                 return -EINVAL;
7164
7165         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7166                 return -EINVAL;
7167
7168         if (!info->attrs[NL80211_ATTR_SSID])
7169                 return -EINVAL;
7170
7171         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7172                 return -EINVAL;
7173
7174         err = nl80211_parse_key(info, &key);
7175         if (err)
7176                 return err;
7177
7178         if (key.idx >= 0) {
7179                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7180                         return -EINVAL;
7181                 if (!key.p.key || !key.p.key_len)
7182                         return -EINVAL;
7183                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7184                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7185                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7186                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7187                         return -EINVAL;
7188                 if (key.idx > 4)
7189                         return -EINVAL;
7190         } else {
7191                 key.p.key_len = 0;
7192                 key.p.key = NULL;
7193         }
7194
7195         if (key.idx >= 0) {
7196                 int i;
7197                 bool ok = false;
7198                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7199                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7200                                 ok = true;
7201                                 break;
7202                         }
7203                 }
7204                 if (!ok)
7205                         return -EINVAL;
7206         }
7207
7208         if (!rdev->ops->auth)
7209                 return -EOPNOTSUPP;
7210
7211         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7212             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7213                 return -EOPNOTSUPP;
7214
7215         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7216         chan = nl80211_get_valid_chan(&rdev->wiphy,
7217                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7218         if (!chan)
7219                 return -EINVAL;
7220
7221         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7222         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7223
7224         if (info->attrs[NL80211_ATTR_IE]) {
7225                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7226                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7227         }
7228
7229         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7230         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7231                 return -EINVAL;
7232
7233         if (auth_type == NL80211_AUTHTYPE_SAE &&
7234             !info->attrs[NL80211_ATTR_SAE_DATA])
7235                 return -EINVAL;
7236
7237         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7238                 if (auth_type != NL80211_AUTHTYPE_SAE)
7239                         return -EINVAL;
7240                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7241                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7242                 /* need to include at least Auth Transaction and Status Code */
7243                 if (sae_data_len < 4)
7244                         return -EINVAL;
7245         }
7246
7247         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7248
7249         /*
7250          * Since we no longer track auth state, ignore
7251          * requests to only change local state.
7252          */
7253         if (local_state_change)
7254                 return 0;
7255
7256         wdev_lock(dev->ieee80211_ptr);
7257         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7258                                  ssid, ssid_len, ie, ie_len,
7259                                  key.p.key, key.p.key_len, key.idx,
7260                                  sae_data, sae_data_len);
7261         wdev_unlock(dev->ieee80211_ptr);
7262         return err;
7263 }
7264
7265 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7266                                    struct genl_info *info,
7267                                    struct cfg80211_crypto_settings *settings,
7268                                    int cipher_limit)
7269 {
7270         memset(settings, 0, sizeof(*settings));
7271
7272         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7273
7274         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7275                 u16 proto;
7276                 proto = nla_get_u16(
7277                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7278                 settings->control_port_ethertype = cpu_to_be16(proto);
7279                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7280                     proto != ETH_P_PAE)
7281                         return -EINVAL;
7282                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7283                         settings->control_port_no_encrypt = true;
7284         } else
7285                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7286
7287         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7288                 void *data;
7289                 int len, i;
7290
7291                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7292                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7293                 settings->n_ciphers_pairwise = len / sizeof(u32);
7294
7295                 if (len % sizeof(u32))
7296                         return -EINVAL;
7297
7298                 if (settings->n_ciphers_pairwise > cipher_limit)
7299                         return -EINVAL;
7300
7301                 memcpy(settings->ciphers_pairwise, data, len);
7302
7303                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7304                         if (!cfg80211_supported_cipher_suite(
7305                                         &rdev->wiphy,
7306                                         settings->ciphers_pairwise[i]))
7307                                 return -EINVAL;
7308         }
7309
7310         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7311                 settings->cipher_group =
7312                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7313                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7314                                                      settings->cipher_group))
7315                         return -EINVAL;
7316         }
7317
7318         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7319                 settings->wpa_versions =
7320                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7321                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7322                         return -EINVAL;
7323         }
7324
7325         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7326                 void *data;
7327                 int len;
7328
7329                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7330                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7331                 settings->n_akm_suites = len / sizeof(u32);
7332
7333                 if (len % sizeof(u32))
7334                         return -EINVAL;
7335
7336                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7337                         return -EINVAL;
7338
7339                 memcpy(settings->akm_suites, data, len);
7340         }
7341
7342         return 0;
7343 }
7344
7345 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7346 {
7347         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7348         struct net_device *dev = info->user_ptr[1];
7349         struct ieee80211_channel *chan;
7350         struct cfg80211_assoc_request req = {};
7351         const u8 *bssid, *ssid;
7352         int err, ssid_len = 0;
7353
7354         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7355                 return -EINVAL;
7356
7357         if (!info->attrs[NL80211_ATTR_MAC] ||
7358             !info->attrs[NL80211_ATTR_SSID] ||
7359             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7360                 return -EINVAL;
7361
7362         if (!rdev->ops->assoc)
7363                 return -EOPNOTSUPP;
7364
7365         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7366             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7367                 return -EOPNOTSUPP;
7368
7369         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7370
7371         chan = nl80211_get_valid_chan(&rdev->wiphy,
7372                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7373         if (!chan)
7374                 return -EINVAL;
7375
7376         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7377         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7378
7379         if (info->attrs[NL80211_ATTR_IE]) {
7380                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7381                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7382         }
7383
7384         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7385                 enum nl80211_mfp mfp =
7386                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7387                 if (mfp == NL80211_MFP_REQUIRED)
7388                         req.use_mfp = true;
7389                 else if (mfp != NL80211_MFP_NO)
7390                         return -EINVAL;
7391         }
7392
7393         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7394                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7395
7396         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7397                 req.flags |= ASSOC_REQ_DISABLE_HT;
7398
7399         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7400                 memcpy(&req.ht_capa_mask,
7401                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7402                        sizeof(req.ht_capa_mask));
7403
7404         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7405                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7406                         return -EINVAL;
7407                 memcpy(&req.ht_capa,
7408                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7409                        sizeof(req.ht_capa));
7410         }
7411
7412         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7413                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7414
7415         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7416                 memcpy(&req.vht_capa_mask,
7417                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7418                        sizeof(req.vht_capa_mask));
7419
7420         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7421                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7422                         return -EINVAL;
7423                 memcpy(&req.vht_capa,
7424                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7425                        sizeof(req.vht_capa));
7426         }
7427
7428         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7429                 if (!((rdev->wiphy.features &
7430                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7431                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7432                     !wiphy_ext_feature_isset(&rdev->wiphy,
7433                                              NL80211_EXT_FEATURE_RRM))
7434                         return -EINVAL;
7435                 req.flags |= ASSOC_REQ_USE_RRM;
7436         }
7437
7438         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7439         if (!err) {
7440                 wdev_lock(dev->ieee80211_ptr);
7441                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7442                                           ssid, ssid_len, &req);
7443                 wdev_unlock(dev->ieee80211_ptr);
7444         }
7445
7446         return err;
7447 }
7448
7449 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7450 {
7451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7452         struct net_device *dev = info->user_ptr[1];
7453         const u8 *ie = NULL, *bssid;
7454         int ie_len = 0, err;
7455         u16 reason_code;
7456         bool local_state_change;
7457
7458         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7459                 return -EINVAL;
7460
7461         if (!info->attrs[NL80211_ATTR_MAC])
7462                 return -EINVAL;
7463
7464         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7465                 return -EINVAL;
7466
7467         if (!rdev->ops->deauth)
7468                 return -EOPNOTSUPP;
7469
7470         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7471             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7472                 return -EOPNOTSUPP;
7473
7474         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7475
7476         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7477         if (reason_code == 0) {
7478                 /* Reason Code 0 is reserved */
7479                 return -EINVAL;
7480         }
7481
7482         if (info->attrs[NL80211_ATTR_IE]) {
7483                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7484                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7485         }
7486
7487         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7488
7489         wdev_lock(dev->ieee80211_ptr);
7490         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7491                                    local_state_change);
7492         wdev_unlock(dev->ieee80211_ptr);
7493         return err;
7494 }
7495
7496 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7497 {
7498         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7499         struct net_device *dev = info->user_ptr[1];
7500         const u8 *ie = NULL, *bssid;
7501         int ie_len = 0, err;
7502         u16 reason_code;
7503         bool local_state_change;
7504
7505         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7506                 return -EINVAL;
7507
7508         if (!info->attrs[NL80211_ATTR_MAC])
7509                 return -EINVAL;
7510
7511         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7512                 return -EINVAL;
7513
7514         if (!rdev->ops->disassoc)
7515                 return -EOPNOTSUPP;
7516
7517         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7518             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7519                 return -EOPNOTSUPP;
7520
7521         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7522
7523         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7524         if (reason_code == 0) {
7525                 /* Reason Code 0 is reserved */
7526                 return -EINVAL;
7527         }
7528
7529         if (info->attrs[NL80211_ATTR_IE]) {
7530                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7531                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7532         }
7533
7534         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7535
7536         wdev_lock(dev->ieee80211_ptr);
7537         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7538                                      local_state_change);
7539         wdev_unlock(dev->ieee80211_ptr);
7540         return err;
7541 }
7542
7543 static bool
7544 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7545                          int mcast_rate[NUM_NL80211_BANDS],
7546                          int rateval)
7547 {
7548         struct wiphy *wiphy = &rdev->wiphy;
7549         bool found = false;
7550         int band, i;
7551
7552         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7553                 struct ieee80211_supported_band *sband;
7554
7555                 sband = wiphy->bands[band];
7556                 if (!sband)
7557                         continue;
7558
7559                 for (i = 0; i < sband->n_bitrates; i++) {
7560                         if (sband->bitrates[i].bitrate == rateval) {
7561                                 mcast_rate[band] = i + 1;
7562                                 found = true;
7563                                 break;
7564                         }
7565                 }
7566         }
7567
7568         return found;
7569 }
7570
7571 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7572 {
7573         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7574         struct net_device *dev = info->user_ptr[1];
7575         struct cfg80211_ibss_params ibss;
7576         struct wiphy *wiphy;
7577         struct cfg80211_cached_keys *connkeys = NULL;
7578         int err;
7579
7580         memset(&ibss, 0, sizeof(ibss));
7581
7582         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7583                 return -EINVAL;
7584
7585         if (!info->attrs[NL80211_ATTR_SSID] ||
7586             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7587                 return -EINVAL;
7588
7589         ibss.beacon_interval = 100;
7590
7591         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7592                 ibss.beacon_interval =
7593                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7594                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7595                         return -EINVAL;
7596         }
7597
7598         if (!rdev->ops->join_ibss)
7599                 return -EOPNOTSUPP;
7600
7601         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7602                 return -EOPNOTSUPP;
7603
7604         wiphy = &rdev->wiphy;
7605
7606         if (info->attrs[NL80211_ATTR_MAC]) {
7607                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7608
7609                 if (!is_valid_ether_addr(ibss.bssid))
7610                         return -EINVAL;
7611         }
7612         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7613         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7614
7615         if (info->attrs[NL80211_ATTR_IE]) {
7616                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7617                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7618         }
7619
7620         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7621         if (err)
7622                 return err;
7623
7624         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7625                                      NL80211_IFTYPE_ADHOC))
7626                 return -EINVAL;
7627
7628         switch (ibss.chandef.width) {
7629         case NL80211_CHAN_WIDTH_5:
7630         case NL80211_CHAN_WIDTH_10:
7631         case NL80211_CHAN_WIDTH_20_NOHT:
7632                 break;
7633         case NL80211_CHAN_WIDTH_20:
7634         case NL80211_CHAN_WIDTH_40:
7635                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7636                         return -EINVAL;
7637                 break;
7638         case NL80211_CHAN_WIDTH_80:
7639         case NL80211_CHAN_WIDTH_80P80:
7640         case NL80211_CHAN_WIDTH_160:
7641                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7642                         return -EINVAL;
7643                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7644                                              NL80211_EXT_FEATURE_VHT_IBSS))
7645                         return -EINVAL;
7646                 break;
7647         default:
7648                 return -EINVAL;
7649         }
7650
7651         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7652         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7653
7654         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7655                 u8 *rates =
7656                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7657                 int n_rates =
7658                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7659                 struct ieee80211_supported_band *sband =
7660                         wiphy->bands[ibss.chandef.chan->band];
7661
7662                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7663                                              &ibss.basic_rates);
7664                 if (err)
7665                         return err;
7666         }
7667
7668         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7669                 memcpy(&ibss.ht_capa_mask,
7670                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7671                        sizeof(ibss.ht_capa_mask));
7672
7673         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7674                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7675                         return -EINVAL;
7676                 memcpy(&ibss.ht_capa,
7677                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7678                        sizeof(ibss.ht_capa));
7679         }
7680
7681         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7682             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7683                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7684                 return -EINVAL;
7685
7686         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7687                 bool no_ht = false;
7688
7689                 connkeys = nl80211_parse_connkeys(rdev,
7690                                           info->attrs[NL80211_ATTR_KEYS],
7691                                           &no_ht);
7692                 if (IS_ERR(connkeys))
7693                         return PTR_ERR(connkeys);
7694
7695                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7696                     no_ht) {
7697                         kzfree(connkeys);
7698                         return -EINVAL;
7699                 }
7700         }
7701
7702         ibss.control_port =
7703                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7704
7705         ibss.userspace_handles_dfs =
7706                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7707
7708         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7709         if (err)
7710                 kzfree(connkeys);
7711         return err;
7712 }
7713
7714 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7715 {
7716         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7717         struct net_device *dev = info->user_ptr[1];
7718
7719         if (!rdev->ops->leave_ibss)
7720                 return -EOPNOTSUPP;
7721
7722         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7723                 return -EOPNOTSUPP;
7724
7725         return cfg80211_leave_ibss(rdev, dev, false);
7726 }
7727
7728 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7729 {
7730         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7731         struct net_device *dev = info->user_ptr[1];
7732         int mcast_rate[NUM_NL80211_BANDS];
7733         u32 nla_rate;
7734         int err;
7735
7736         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7737             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7738             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7739                 return -EOPNOTSUPP;
7740
7741         if (!rdev->ops->set_mcast_rate)
7742                 return -EOPNOTSUPP;
7743
7744         memset(mcast_rate, 0, sizeof(mcast_rate));
7745
7746         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7747                 return -EINVAL;
7748
7749         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7750         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7751                 return -EINVAL;
7752
7753         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7754
7755         return err;
7756 }
7757
7758 static struct sk_buff *
7759 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7760                             struct wireless_dev *wdev, int approxlen,
7761                             u32 portid, u32 seq, enum nl80211_commands cmd,
7762                             enum nl80211_attrs attr,
7763                             const struct nl80211_vendor_cmd_info *info,
7764                             gfp_t gfp)
7765 {
7766         struct sk_buff *skb;
7767         void *hdr;
7768         struct nlattr *data;
7769
7770         skb = nlmsg_new(approxlen + 100, gfp);
7771         if (!skb)
7772                 return NULL;
7773
7774         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7775         if (!hdr) {
7776                 kfree_skb(skb);
7777                 return NULL;
7778         }
7779
7780         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7781                 goto nla_put_failure;
7782
7783         if (info) {
7784                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7785                                 info->vendor_id))
7786                         goto nla_put_failure;
7787                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7788                                 info->subcmd))
7789                         goto nla_put_failure;
7790         }
7791
7792         if (wdev) {
7793                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
7794                                       wdev_id(wdev), NL80211_ATTR_PAD))
7795                         goto nla_put_failure;
7796                 if (wdev->netdev &&
7797                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7798                                 wdev->netdev->ifindex))
7799                         goto nla_put_failure;
7800         }
7801
7802         data = nla_nest_start(skb, attr);
7803
7804         ((void **)skb->cb)[0] = rdev;
7805         ((void **)skb->cb)[1] = hdr;
7806         ((void **)skb->cb)[2] = data;
7807
7808         return skb;
7809
7810  nla_put_failure:
7811         kfree_skb(skb);
7812         return NULL;
7813 }
7814
7815 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7816                                            struct wireless_dev *wdev,
7817                                            enum nl80211_commands cmd,
7818                                            enum nl80211_attrs attr,
7819                                            int vendor_event_idx,
7820                                            int approxlen, gfp_t gfp)
7821 {
7822         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7823         const struct nl80211_vendor_cmd_info *info;
7824
7825         switch (cmd) {
7826         case NL80211_CMD_TESTMODE:
7827                 if (WARN_ON(vendor_event_idx != -1))
7828                         return NULL;
7829                 info = NULL;
7830                 break;
7831         case NL80211_CMD_VENDOR:
7832                 if (WARN_ON(vendor_event_idx < 0 ||
7833                             vendor_event_idx >= wiphy->n_vendor_events))
7834                         return NULL;
7835                 info = &wiphy->vendor_events[vendor_event_idx];
7836                 break;
7837         default:
7838                 WARN_ON(1);
7839                 return NULL;
7840         }
7841
7842         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7843                                            cmd, attr, info, gfp);
7844 }
7845 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7846
7847 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7848 {
7849         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7850         void *hdr = ((void **)skb->cb)[1];
7851         struct nlattr *data = ((void **)skb->cb)[2];
7852         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7853
7854         /* clear CB data for netlink core to own from now on */
7855         memset(skb->cb, 0, sizeof(skb->cb));
7856
7857         nla_nest_end(skb, data);
7858         genlmsg_end(skb, hdr);
7859
7860         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7861                 mcgrp = NL80211_MCGRP_VENDOR;
7862
7863         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7864                                 mcgrp, gfp);
7865 }
7866 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7867
7868 #ifdef CONFIG_NL80211_TESTMODE
7869 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7870 {
7871         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7872         struct wireless_dev *wdev =
7873                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7874         int err;
7875
7876         if (!rdev->ops->testmode_cmd)
7877                 return -EOPNOTSUPP;
7878
7879         if (IS_ERR(wdev)) {
7880                 err = PTR_ERR(wdev);
7881                 if (err != -EINVAL)
7882                         return err;
7883                 wdev = NULL;
7884         } else if (wdev->wiphy != &rdev->wiphy) {
7885                 return -EINVAL;
7886         }
7887
7888         if (!info->attrs[NL80211_ATTR_TESTDATA])
7889                 return -EINVAL;
7890
7891         rdev->cur_cmd_info = info;
7892         err = rdev_testmode_cmd(rdev, wdev,
7893                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7894                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7895         rdev->cur_cmd_info = NULL;
7896
7897         return err;
7898 }
7899
7900 static int nl80211_testmode_dump(struct sk_buff *skb,
7901                                  struct netlink_callback *cb)
7902 {
7903         struct cfg80211_registered_device *rdev;
7904         int err;
7905         long phy_idx;
7906         void *data = NULL;
7907         int data_len = 0;
7908
7909         rtnl_lock();
7910
7911         if (cb->args[0]) {
7912                 /*
7913                  * 0 is a valid index, but not valid for args[0],
7914                  * so we need to offset by 1.
7915                  */
7916                 phy_idx = cb->args[0] - 1;
7917         } else {
7918                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7919                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7920                                   nl80211_policy);
7921                 if (err)
7922                         goto out_err;
7923
7924                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7925                                                   nl80211_fam.attrbuf);
7926                 if (IS_ERR(rdev)) {
7927                         err = PTR_ERR(rdev);
7928                         goto out_err;
7929                 }
7930                 phy_idx = rdev->wiphy_idx;
7931                 rdev = NULL;
7932
7933                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7934                         cb->args[1] =
7935                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7936         }
7937
7938         if (cb->args[1]) {
7939                 data = nla_data((void *)cb->args[1]);
7940                 data_len = nla_len((void *)cb->args[1]);
7941         }
7942
7943         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7944         if (!rdev) {
7945                 err = -ENOENT;
7946                 goto out_err;
7947         }
7948
7949         if (!rdev->ops->testmode_dump) {
7950                 err = -EOPNOTSUPP;
7951                 goto out_err;
7952         }
7953
7954         while (1) {
7955                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7956                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7957                                            NL80211_CMD_TESTMODE);
7958                 struct nlattr *tmdata;
7959
7960                 if (!hdr)
7961                         break;
7962
7963                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7964                         genlmsg_cancel(skb, hdr);
7965                         break;
7966                 }
7967
7968                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7969                 if (!tmdata) {
7970                         genlmsg_cancel(skb, hdr);
7971                         break;
7972                 }
7973                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7974                 nla_nest_end(skb, tmdata);
7975
7976                 if (err == -ENOBUFS || err == -ENOENT) {
7977                         genlmsg_cancel(skb, hdr);
7978                         break;
7979                 } else if (err) {
7980                         genlmsg_cancel(skb, hdr);
7981                         goto out_err;
7982                 }
7983
7984                 genlmsg_end(skb, hdr);
7985         }
7986
7987         err = skb->len;
7988         /* see above */
7989         cb->args[0] = phy_idx + 1;
7990  out_err:
7991         rtnl_unlock();
7992         return err;
7993 }
7994 #endif
7995
7996 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7997 {
7998         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7999         struct net_device *dev = info->user_ptr[1];
8000         struct cfg80211_connect_params connect;
8001         struct wiphy *wiphy;
8002         struct cfg80211_cached_keys *connkeys = NULL;
8003         int err;
8004
8005         memset(&connect, 0, sizeof(connect));
8006
8007         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8008                 return -EINVAL;
8009
8010         if (!info->attrs[NL80211_ATTR_SSID] ||
8011             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8012                 return -EINVAL;
8013
8014         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8015                 connect.auth_type =
8016                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8017                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8018                                              NL80211_CMD_CONNECT))
8019                         return -EINVAL;
8020         } else
8021                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8022
8023         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8024
8025         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8026                                       NL80211_MAX_NR_CIPHER_SUITES);
8027         if (err)
8028                 return err;
8029
8030         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8031             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8032                 return -EOPNOTSUPP;
8033
8034         wiphy = &rdev->wiphy;
8035
8036         connect.bg_scan_period = -1;
8037         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8038                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8039                 connect.bg_scan_period =
8040                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8041         }
8042
8043         if (info->attrs[NL80211_ATTR_MAC])
8044                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8045         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8046                 connect.bssid_hint =
8047                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8048         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8049         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8050
8051         if (info->attrs[NL80211_ATTR_IE]) {
8052                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8053                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8054         }
8055
8056         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8057                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8058                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8059                     connect.mfp != NL80211_MFP_NO)
8060                         return -EINVAL;
8061         } else {
8062                 connect.mfp = NL80211_MFP_NO;
8063         }
8064
8065         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8066                 connect.prev_bssid =
8067                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8068
8069         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8070                 connect.channel = nl80211_get_valid_chan(
8071                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8072                 if (!connect.channel)
8073                         return -EINVAL;
8074         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8075                 connect.channel_hint = nl80211_get_valid_chan(
8076                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8077                 if (!connect.channel_hint)
8078                         return -EINVAL;
8079         }
8080
8081         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8082                 connkeys = nl80211_parse_connkeys(rdev,
8083                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8084                 if (IS_ERR(connkeys))
8085                         return PTR_ERR(connkeys);
8086         }
8087
8088         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8089                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8090
8091         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8092                 memcpy(&connect.ht_capa_mask,
8093                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8094                        sizeof(connect.ht_capa_mask));
8095
8096         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8097                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8098                         kzfree(connkeys);
8099                         return -EINVAL;
8100                 }
8101                 memcpy(&connect.ht_capa,
8102                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8103                        sizeof(connect.ht_capa));
8104         }
8105
8106         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8107                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8108
8109         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8110                 memcpy(&connect.vht_capa_mask,
8111                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8112                        sizeof(connect.vht_capa_mask));
8113
8114         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8115                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8116                         kzfree(connkeys);
8117                         return -EINVAL;
8118                 }
8119                 memcpy(&connect.vht_capa,
8120                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8121                        sizeof(connect.vht_capa));
8122         }
8123
8124         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8125                 if (!((rdev->wiphy.features &
8126                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8127                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8128                     !wiphy_ext_feature_isset(&rdev->wiphy,
8129                                              NL80211_EXT_FEATURE_RRM)) {
8130                         kzfree(connkeys);
8131                         return -EINVAL;
8132                 }
8133                 connect.flags |= ASSOC_REQ_USE_RRM;
8134         }
8135
8136         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8137         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8138                 kzfree(connkeys);
8139                 return -EOPNOTSUPP;
8140         }
8141
8142         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8143                 /* bss selection makes no sense if bssid is set */
8144                 if (connect.bssid) {
8145                         kzfree(connkeys);
8146                         return -EINVAL;
8147                 }
8148
8149                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8150                                        wiphy, &connect.bss_select);
8151                 if (err) {
8152                         kzfree(connkeys);
8153                         return err;
8154                 }
8155         }
8156
8157         wdev_lock(dev->ieee80211_ptr);
8158         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8159                                connect.prev_bssid);
8160         wdev_unlock(dev->ieee80211_ptr);
8161         if (err)
8162                 kzfree(connkeys);
8163         return err;
8164 }
8165
8166 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8167 {
8168         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8169         struct net_device *dev = info->user_ptr[1];
8170         u16 reason;
8171         int ret;
8172
8173         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8174                 reason = WLAN_REASON_DEAUTH_LEAVING;
8175         else
8176                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8177
8178         if (reason == 0)
8179                 return -EINVAL;
8180
8181         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8182             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8183                 return -EOPNOTSUPP;
8184
8185         wdev_lock(dev->ieee80211_ptr);
8186         ret = cfg80211_disconnect(rdev, dev, reason, true);
8187         wdev_unlock(dev->ieee80211_ptr);
8188         return ret;
8189 }
8190
8191 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8192 {
8193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8194         struct net *net;
8195         int err;
8196
8197         if (info->attrs[NL80211_ATTR_PID]) {
8198                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8199
8200                 net = get_net_ns_by_pid(pid);
8201         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8202                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8203
8204                 net = get_net_ns_by_fd(fd);
8205         } else {
8206                 return -EINVAL;
8207         }
8208
8209         if (IS_ERR(net))
8210                 return PTR_ERR(net);
8211
8212         err = 0;
8213
8214         /* check if anything to do */
8215         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8216                 err = cfg80211_switch_netns(rdev, net);
8217
8218         put_net(net);
8219         return err;
8220 }
8221
8222 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8223 {
8224         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8225         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8226                         struct cfg80211_pmksa *pmksa) = NULL;
8227         struct net_device *dev = info->user_ptr[1];
8228         struct cfg80211_pmksa pmksa;
8229
8230         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8231
8232         if (!info->attrs[NL80211_ATTR_MAC])
8233                 return -EINVAL;
8234
8235         if (!info->attrs[NL80211_ATTR_PMKID])
8236                 return -EINVAL;
8237
8238         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8239         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8240
8241         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8242             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8243                 return -EOPNOTSUPP;
8244
8245         switch (info->genlhdr->cmd) {
8246         case NL80211_CMD_SET_PMKSA:
8247                 rdev_ops = rdev->ops->set_pmksa;
8248                 break;
8249         case NL80211_CMD_DEL_PMKSA:
8250                 rdev_ops = rdev->ops->del_pmksa;
8251                 break;
8252         default:
8253                 WARN_ON(1);
8254                 break;
8255         }
8256
8257         if (!rdev_ops)
8258                 return -EOPNOTSUPP;
8259
8260         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8261 }
8262
8263 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8264 {
8265         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8266         struct net_device *dev = info->user_ptr[1];
8267
8268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8269             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8270                 return -EOPNOTSUPP;
8271
8272         if (!rdev->ops->flush_pmksa)
8273                 return -EOPNOTSUPP;
8274
8275         return rdev_flush_pmksa(rdev, dev);
8276 }
8277
8278 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8279 {
8280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8281         struct net_device *dev = info->user_ptr[1];
8282         u8 action_code, dialog_token;
8283         u32 peer_capability = 0;
8284         u16 status_code;
8285         u8 *peer;
8286         bool initiator;
8287
8288         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8289             !rdev->ops->tdls_mgmt)
8290                 return -EOPNOTSUPP;
8291
8292         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8293             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8294             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8295             !info->attrs[NL80211_ATTR_IE] ||
8296             !info->attrs[NL80211_ATTR_MAC])
8297                 return -EINVAL;
8298
8299         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8300         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8301         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8302         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8303         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8304         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8305                 peer_capability =
8306                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8307
8308         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8309                               dialog_token, status_code, peer_capability,
8310                               initiator,
8311                               nla_data(info->attrs[NL80211_ATTR_IE]),
8312                               nla_len(info->attrs[NL80211_ATTR_IE]));
8313 }
8314
8315 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8316 {
8317         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8318         struct net_device *dev = info->user_ptr[1];
8319         enum nl80211_tdls_operation operation;
8320         u8 *peer;
8321
8322         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8323             !rdev->ops->tdls_oper)
8324                 return -EOPNOTSUPP;
8325
8326         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8327             !info->attrs[NL80211_ATTR_MAC])
8328                 return -EINVAL;
8329
8330         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8331         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8332
8333         return rdev_tdls_oper(rdev, dev, peer, operation);
8334 }
8335
8336 static int nl80211_remain_on_channel(struct sk_buff *skb,
8337                                      struct genl_info *info)
8338 {
8339         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8340         struct wireless_dev *wdev = info->user_ptr[1];
8341         struct cfg80211_chan_def chandef;
8342         struct sk_buff *msg;
8343         void *hdr;
8344         u64 cookie;
8345         u32 duration;
8346         int err;
8347
8348         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8349             !info->attrs[NL80211_ATTR_DURATION])
8350                 return -EINVAL;
8351
8352         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8353
8354         if (!rdev->ops->remain_on_channel ||
8355             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8356                 return -EOPNOTSUPP;
8357
8358         /*
8359          * We should be on that channel for at least a minimum amount of
8360          * time (10ms) but no longer than the driver supports.
8361          */
8362         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8363             duration > rdev->wiphy.max_remain_on_channel_duration)
8364                 return -EINVAL;
8365
8366         err = nl80211_parse_chandef(rdev, info, &chandef);
8367         if (err)
8368                 return err;
8369
8370         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8371         if (!msg)
8372                 return -ENOMEM;
8373
8374         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8375                              NL80211_CMD_REMAIN_ON_CHANNEL);
8376         if (!hdr) {
8377                 err = -ENOBUFS;
8378                 goto free_msg;
8379         }
8380
8381         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8382                                      duration, &cookie);
8383
8384         if (err)
8385                 goto free_msg;
8386
8387         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8388                               NL80211_ATTR_PAD))
8389                 goto nla_put_failure;
8390
8391         genlmsg_end(msg, hdr);
8392
8393         return genlmsg_reply(msg, info);
8394
8395  nla_put_failure:
8396         err = -ENOBUFS;
8397  free_msg:
8398         nlmsg_free(msg);
8399         return err;
8400 }
8401
8402 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8403                                             struct genl_info *info)
8404 {
8405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8406         struct wireless_dev *wdev = info->user_ptr[1];
8407         u64 cookie;
8408
8409         if (!info->attrs[NL80211_ATTR_COOKIE])
8410                 return -EINVAL;
8411
8412         if (!rdev->ops->cancel_remain_on_channel)
8413                 return -EOPNOTSUPP;
8414
8415         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8416
8417         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8418 }
8419
8420 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8421                            u8 *rates, u8 rates_len)
8422 {
8423         u8 i;
8424         u32 mask = 0;
8425
8426         for (i = 0; i < rates_len; i++) {
8427                 int rate = (rates[i] & 0x7f) * 5;
8428                 int ridx;
8429                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8430                         struct ieee80211_rate *srate =
8431                                 &sband->bitrates[ridx];
8432                         if (rate == srate->bitrate) {
8433                                 mask |= 1 << ridx;
8434                                 break;
8435                         }
8436                 }
8437                 if (ridx == sband->n_bitrates)
8438                         return 0; /* rate not found */
8439         }
8440
8441         return mask;
8442 }
8443
8444 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8445                                u8 *rates, u8 rates_len,
8446                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8447 {
8448         u8 i;
8449
8450         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8451
8452         for (i = 0; i < rates_len; i++) {
8453                 int ridx, rbit;
8454
8455                 ridx = rates[i] / 8;
8456                 rbit = BIT(rates[i] % 8);
8457
8458                 /* check validity */
8459                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8460                         return false;
8461
8462                 /* check availability */
8463                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8464                         mcs[ridx] |= rbit;
8465                 else
8466                         return false;
8467         }
8468
8469         return true;
8470 }
8471
8472 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8473 {
8474         u16 mcs_mask = 0;
8475
8476         switch (vht_mcs_map) {
8477         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8478                 break;
8479         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8480                 mcs_mask = 0x00FF;
8481                 break;
8482         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8483                 mcs_mask = 0x01FF;
8484                 break;
8485         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8486                 mcs_mask = 0x03FF;
8487                 break;
8488         default:
8489                 break;
8490         }
8491
8492         return mcs_mask;
8493 }
8494
8495 static void vht_build_mcs_mask(u16 vht_mcs_map,
8496                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8497 {
8498         u8 nss;
8499
8500         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8501                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8502                 vht_mcs_map >>= 2;
8503         }
8504 }
8505
8506 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8507                              struct nl80211_txrate_vht *txrate,
8508                              u16 mcs[NL80211_VHT_NSS_MAX])
8509 {
8510         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8511         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8512         u8 i;
8513
8514         if (!sband->vht_cap.vht_supported)
8515                 return false;
8516
8517         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8518
8519         /* Build vht_mcs_mask from VHT capabilities */
8520         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8521
8522         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8523                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8524                         mcs[i] = txrate->mcs[i];
8525                 else
8526                         return false;
8527         }
8528
8529         return true;
8530 }
8531
8532 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8533         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8534                                     .len = NL80211_MAX_SUPP_RATES },
8535         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8536                                 .len = NL80211_MAX_SUPP_HT_RATES },
8537         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8538         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8539 };
8540
8541 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8542                                        struct genl_info *info)
8543 {
8544         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8545         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8546         struct cfg80211_bitrate_mask mask;
8547         int rem, i;
8548         struct net_device *dev = info->user_ptr[1];
8549         struct nlattr *tx_rates;
8550         struct ieee80211_supported_band *sband;
8551         u16 vht_tx_mcs_map;
8552
8553         if (!rdev->ops->set_bitrate_mask)
8554                 return -EOPNOTSUPP;
8555
8556         memset(&mask, 0, sizeof(mask));
8557         /* Default to all rates enabled */
8558         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8559                 sband = rdev->wiphy.bands[i];
8560
8561                 if (!sband)
8562                         continue;
8563
8564                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8565                 memcpy(mask.control[i].ht_mcs,
8566                        sband->ht_cap.mcs.rx_mask,
8567                        sizeof(mask.control[i].ht_mcs));
8568
8569                 if (!sband->vht_cap.vht_supported)
8570                         continue;
8571
8572                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8573                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8574         }
8575
8576         /* if no rates are given set it back to the defaults */
8577         if (!info->attrs[NL80211_ATTR_TX_RATES])
8578                 goto out;
8579
8580         /*
8581          * The nested attribute uses enum nl80211_band as the index. This maps
8582          * directly to the enum nl80211_band values used in cfg80211.
8583          */
8584         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8585         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8586                 enum nl80211_band band = nla_type(tx_rates);
8587                 int err;
8588
8589                 if (band < 0 || band >= NUM_NL80211_BANDS)
8590                         return -EINVAL;
8591                 sband = rdev->wiphy.bands[band];
8592                 if (sband == NULL)
8593                         return -EINVAL;
8594                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8595                                 nla_len(tx_rates), nl80211_txattr_policy);
8596                 if (err)
8597                         return err;
8598                 if (tb[NL80211_TXRATE_LEGACY]) {
8599                         mask.control[band].legacy = rateset_to_mask(
8600                                 sband,
8601                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8602                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8603                         if ((mask.control[band].legacy == 0) &&
8604                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8605                                 return -EINVAL;
8606                 }
8607                 if (tb[NL80211_TXRATE_HT]) {
8608                         if (!ht_rateset_to_mask(
8609                                         sband,
8610                                         nla_data(tb[NL80211_TXRATE_HT]),
8611                                         nla_len(tb[NL80211_TXRATE_HT]),
8612                                         mask.control[band].ht_mcs))
8613                                 return -EINVAL;
8614                 }
8615                 if (tb[NL80211_TXRATE_VHT]) {
8616                         if (!vht_set_mcs_mask(
8617                                         sband,
8618                                         nla_data(tb[NL80211_TXRATE_VHT]),
8619                                         mask.control[band].vht_mcs))
8620                                 return -EINVAL;
8621                 }
8622                 if (tb[NL80211_TXRATE_GI]) {
8623                         mask.control[band].gi =
8624                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8625                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8626                                 return -EINVAL;
8627                 }
8628
8629                 if (mask.control[band].legacy == 0) {
8630                         /* don't allow empty legacy rates if HT or VHT
8631                          * are not even supported.
8632                          */
8633                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8634                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8635                                 return -EINVAL;
8636
8637                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8638                                 if (mask.control[band].ht_mcs[i])
8639                                         goto out;
8640
8641                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8642                                 if (mask.control[band].vht_mcs[i])
8643                                         goto out;
8644
8645                         /* legacy and mcs rates may not be both empty */
8646                         return -EINVAL;
8647                 }
8648         }
8649
8650 out:
8651         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8652 }
8653
8654 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8655 {
8656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8657         struct wireless_dev *wdev = info->user_ptr[1];
8658         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8659
8660         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8661                 return -EINVAL;
8662
8663         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8664                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8665
8666         switch (wdev->iftype) {
8667         case NL80211_IFTYPE_STATION:
8668         case NL80211_IFTYPE_ADHOC:
8669         case NL80211_IFTYPE_P2P_CLIENT:
8670         case NL80211_IFTYPE_AP:
8671         case NL80211_IFTYPE_AP_VLAN:
8672         case NL80211_IFTYPE_MESH_POINT:
8673         case NL80211_IFTYPE_P2P_GO:
8674         case NL80211_IFTYPE_P2P_DEVICE:
8675                 break;
8676         default:
8677                 return -EOPNOTSUPP;
8678         }
8679
8680         /* not much point in registering if we can't reply */
8681         if (!rdev->ops->mgmt_tx)
8682                 return -EOPNOTSUPP;
8683
8684         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8685                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8686                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8687 }
8688
8689 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8690 {
8691         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8692         struct wireless_dev *wdev = info->user_ptr[1];
8693         struct cfg80211_chan_def chandef;
8694         int err;
8695         void *hdr = NULL;
8696         u64 cookie;
8697         struct sk_buff *msg = NULL;
8698         struct cfg80211_mgmt_tx_params params = {
8699                 .dont_wait_for_ack =
8700                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8701         };
8702
8703         if (!info->attrs[NL80211_ATTR_FRAME])
8704                 return -EINVAL;
8705
8706         if (!rdev->ops->mgmt_tx)
8707                 return -EOPNOTSUPP;
8708
8709         switch (wdev->iftype) {
8710         case NL80211_IFTYPE_P2P_DEVICE:
8711                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8712                         return -EINVAL;
8713         case NL80211_IFTYPE_STATION:
8714         case NL80211_IFTYPE_ADHOC:
8715         case NL80211_IFTYPE_P2P_CLIENT:
8716         case NL80211_IFTYPE_AP:
8717         case NL80211_IFTYPE_AP_VLAN:
8718         case NL80211_IFTYPE_MESH_POINT:
8719         case NL80211_IFTYPE_P2P_GO:
8720                 break;
8721         default:
8722                 return -EOPNOTSUPP;
8723         }
8724
8725         if (info->attrs[NL80211_ATTR_DURATION]) {
8726                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8727                         return -EINVAL;
8728                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8729
8730                 /*
8731                  * We should wait on the channel for at least a minimum amount
8732                  * of time (10ms) but no longer than the driver supports.
8733                  */
8734                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8735                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8736                         return -EINVAL;
8737
8738         }
8739
8740         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8741
8742         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8743                 return -EINVAL;
8744
8745         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8746
8747         /* get the channel if any has been specified, otherwise pass NULL to
8748          * the driver. The latter will use the current one
8749          */
8750         chandef.chan = NULL;
8751         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8752                 err = nl80211_parse_chandef(rdev, info, &chandef);
8753                 if (err)
8754                         return err;
8755         }
8756
8757         if (!chandef.chan && params.offchan)
8758                 return -EINVAL;
8759
8760         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8761         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8762
8763         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8764                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8765                 int i;
8766
8767                 if (len % sizeof(u16))
8768                         return -EINVAL;
8769
8770                 params.n_csa_offsets = len / sizeof(u16);
8771                 params.csa_offsets =
8772                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8773
8774                 /* check that all the offsets fit the frame */
8775                 for (i = 0; i < params.n_csa_offsets; i++) {
8776                         if (params.csa_offsets[i] >= params.len)
8777                                 return -EINVAL;
8778                 }
8779         }
8780
8781         if (!params.dont_wait_for_ack) {
8782                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8783                 if (!msg)
8784                         return -ENOMEM;
8785
8786                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8787                                      NL80211_CMD_FRAME);
8788                 if (!hdr) {
8789                         err = -ENOBUFS;
8790                         goto free_msg;
8791                 }
8792         }
8793
8794         params.chan = chandef.chan;
8795         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8796         if (err)
8797                 goto free_msg;
8798
8799         if (msg) {
8800                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8801                                       NL80211_ATTR_PAD))
8802                         goto nla_put_failure;
8803
8804                 genlmsg_end(msg, hdr);
8805                 return genlmsg_reply(msg, info);
8806         }
8807
8808         return 0;
8809
8810  nla_put_failure:
8811         err = -ENOBUFS;
8812  free_msg:
8813         nlmsg_free(msg);
8814         return err;
8815 }
8816
8817 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8818 {
8819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8820         struct wireless_dev *wdev = info->user_ptr[1];
8821         u64 cookie;
8822
8823         if (!info->attrs[NL80211_ATTR_COOKIE])
8824                 return -EINVAL;
8825
8826         if (!rdev->ops->mgmt_tx_cancel_wait)
8827                 return -EOPNOTSUPP;
8828
8829         switch (wdev->iftype) {
8830         case NL80211_IFTYPE_STATION:
8831         case NL80211_IFTYPE_ADHOC:
8832         case NL80211_IFTYPE_P2P_CLIENT:
8833         case NL80211_IFTYPE_AP:
8834         case NL80211_IFTYPE_AP_VLAN:
8835         case NL80211_IFTYPE_P2P_GO:
8836         case NL80211_IFTYPE_P2P_DEVICE:
8837                 break;
8838         default:
8839                 return -EOPNOTSUPP;
8840         }
8841
8842         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8843
8844         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8845 }
8846
8847 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8848 {
8849         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8850         struct wireless_dev *wdev;
8851         struct net_device *dev = info->user_ptr[1];
8852         u8 ps_state;
8853         bool state;
8854         int err;
8855
8856         if (!info->attrs[NL80211_ATTR_PS_STATE])
8857                 return -EINVAL;
8858
8859         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8860
8861         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8862                 return -EINVAL;
8863
8864         wdev = dev->ieee80211_ptr;
8865
8866         if (!rdev->ops->set_power_mgmt)
8867                 return -EOPNOTSUPP;
8868
8869         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8870
8871         if (state == wdev->ps)
8872                 return 0;
8873
8874         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8875         if (!err)
8876                 wdev->ps = state;
8877         return err;
8878 }
8879
8880 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8881 {
8882         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8883         enum nl80211_ps_state ps_state;
8884         struct wireless_dev *wdev;
8885         struct net_device *dev = info->user_ptr[1];
8886         struct sk_buff *msg;
8887         void *hdr;
8888         int err;
8889
8890         wdev = dev->ieee80211_ptr;
8891
8892         if (!rdev->ops->set_power_mgmt)
8893                 return -EOPNOTSUPP;
8894
8895         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8896         if (!msg)
8897                 return -ENOMEM;
8898
8899         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8900                              NL80211_CMD_GET_POWER_SAVE);
8901         if (!hdr) {
8902                 err = -ENOBUFS;
8903                 goto free_msg;
8904         }
8905
8906         if (wdev->ps)
8907                 ps_state = NL80211_PS_ENABLED;
8908         else
8909                 ps_state = NL80211_PS_DISABLED;
8910
8911         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8912                 goto nla_put_failure;
8913
8914         genlmsg_end(msg, hdr);
8915         return genlmsg_reply(msg, info);
8916
8917  nla_put_failure:
8918         err = -ENOBUFS;
8919  free_msg:
8920         nlmsg_free(msg);
8921         return err;
8922 }
8923
8924 static const struct nla_policy
8925 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8926         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8927         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8928         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8929         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8930         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8931         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8932 };
8933
8934 static int nl80211_set_cqm_txe(struct genl_info *info,
8935                                u32 rate, u32 pkts, u32 intvl)
8936 {
8937         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8938         struct net_device *dev = info->user_ptr[1];
8939         struct wireless_dev *wdev = dev->ieee80211_ptr;
8940
8941         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8942                 return -EINVAL;
8943
8944         if (!rdev->ops->set_cqm_txe_config)
8945                 return -EOPNOTSUPP;
8946
8947         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8948             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8949                 return -EOPNOTSUPP;
8950
8951         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8952 }
8953
8954 static int nl80211_set_cqm_rssi(struct genl_info *info,
8955                                 s32 threshold, u32 hysteresis)
8956 {
8957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8958         struct net_device *dev = info->user_ptr[1];
8959         struct wireless_dev *wdev = dev->ieee80211_ptr;
8960
8961         if (threshold > 0)
8962                 return -EINVAL;
8963
8964         /* disabling - hysteresis should also be zero then */
8965         if (threshold == 0)
8966                 hysteresis = 0;
8967
8968         if (!rdev->ops->set_cqm_rssi_config)
8969                 return -EOPNOTSUPP;
8970
8971         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8972             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8973                 return -EOPNOTSUPP;
8974
8975         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8976 }
8977
8978 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8979 {
8980         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8981         struct nlattr *cqm;
8982         int err;
8983
8984         cqm = info->attrs[NL80211_ATTR_CQM];
8985         if (!cqm)
8986                 return -EINVAL;
8987
8988         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8989                                nl80211_attr_cqm_policy);
8990         if (err)
8991                 return err;
8992
8993         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8994             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8995                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8996                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8997
8998                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8999         }
9000
9001         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9002             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9003             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9004                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9005                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9006                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9007
9008                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9009         }
9010
9011         return -EINVAL;
9012 }
9013
9014 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9015 {
9016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9017         struct net_device *dev = info->user_ptr[1];
9018         struct ocb_setup setup = {};
9019         int err;
9020
9021         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9022         if (err)
9023                 return err;
9024
9025         return cfg80211_join_ocb(rdev, dev, &setup);
9026 }
9027
9028 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9029 {
9030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9031         struct net_device *dev = info->user_ptr[1];
9032
9033         return cfg80211_leave_ocb(rdev, dev);
9034 }
9035
9036 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9037 {
9038         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9039         struct net_device *dev = info->user_ptr[1];
9040         struct mesh_config cfg;
9041         struct mesh_setup setup;
9042         int err;
9043
9044         /* start with default */
9045         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9046         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9047
9048         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9049                 /* and parse parameters if given */
9050                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9051                 if (err)
9052                         return err;
9053         }
9054
9055         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9056             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9057                 return -EINVAL;
9058
9059         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9060         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9061
9062         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9063             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9064                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9065                         return -EINVAL;
9066
9067         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9068                 setup.beacon_interval =
9069                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9070                 if (setup.beacon_interval < 10 ||
9071                     setup.beacon_interval > 10000)
9072                         return -EINVAL;
9073         }
9074
9075         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9076                 setup.dtim_period =
9077                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9078                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9079                         return -EINVAL;
9080         }
9081
9082         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9083                 /* parse additional setup parameters if given */
9084                 err = nl80211_parse_mesh_setup(info, &setup);
9085                 if (err)
9086                         return err;
9087         }
9088
9089         if (setup.user_mpm)
9090                 cfg.auto_open_plinks = false;
9091
9092         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9093                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9094                 if (err)
9095                         return err;
9096         } else {
9097                 /* cfg80211_join_mesh() will sort it out */
9098                 setup.chandef.chan = NULL;
9099         }
9100
9101         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9102                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9103                 int n_rates =
9104                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9105                 struct ieee80211_supported_band *sband;
9106
9107                 if (!setup.chandef.chan)
9108                         return -EINVAL;
9109
9110                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9111
9112                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9113                                              &setup.basic_rates);
9114                 if (err)
9115                         return err;
9116         }
9117
9118         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9119 }
9120
9121 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9122 {
9123         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9124         struct net_device *dev = info->user_ptr[1];
9125
9126         return cfg80211_leave_mesh(rdev, dev);
9127 }
9128
9129 #ifdef CONFIG_PM
9130 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9131                                         struct cfg80211_registered_device *rdev)
9132 {
9133         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9134         struct nlattr *nl_pats, *nl_pat;
9135         int i, pat_len;
9136
9137         if (!wowlan->n_patterns)
9138                 return 0;
9139
9140         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9141         if (!nl_pats)
9142                 return -ENOBUFS;
9143
9144         for (i = 0; i < wowlan->n_patterns; i++) {
9145                 nl_pat = nla_nest_start(msg, i + 1);
9146                 if (!nl_pat)
9147                         return -ENOBUFS;
9148                 pat_len = wowlan->patterns[i].pattern_len;
9149                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9150                             wowlan->patterns[i].mask) ||
9151                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9152                             wowlan->patterns[i].pattern) ||
9153                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9154                                 wowlan->patterns[i].pkt_offset))
9155                         return -ENOBUFS;
9156                 nla_nest_end(msg, nl_pat);
9157         }
9158         nla_nest_end(msg, nl_pats);
9159
9160         return 0;
9161 }
9162
9163 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9164                                    struct cfg80211_wowlan_tcp *tcp)
9165 {
9166         struct nlattr *nl_tcp;
9167
9168         if (!tcp)
9169                 return 0;
9170
9171         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9172         if (!nl_tcp)
9173                 return -ENOBUFS;
9174
9175         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9176             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9177             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9178             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9179             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9180             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9181                     tcp->payload_len, tcp->payload) ||
9182             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9183                         tcp->data_interval) ||
9184             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9185                     tcp->wake_len, tcp->wake_data) ||
9186             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9187                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9188                 return -ENOBUFS;
9189
9190         if (tcp->payload_seq.len &&
9191             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9192                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9193                 return -ENOBUFS;
9194
9195         if (tcp->payload_tok.len &&
9196             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9197                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9198                     &tcp->payload_tok))
9199                 return -ENOBUFS;
9200
9201         nla_nest_end(msg, nl_tcp);
9202
9203         return 0;
9204 }
9205
9206 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9207                                   struct cfg80211_sched_scan_request *req)
9208 {
9209         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9210         int i;
9211
9212         if (!req)
9213                 return 0;
9214
9215         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9216         if (!nd)
9217                 return -ENOBUFS;
9218
9219         if (req->n_scan_plans == 1 &&
9220             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9221                         req->scan_plans[0].interval * 1000))
9222                 return -ENOBUFS;
9223
9224         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9225                 return -ENOBUFS;
9226
9227         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9228         if (!freqs)
9229                 return -ENOBUFS;
9230
9231         for (i = 0; i < req->n_channels; i++)
9232                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9233
9234         nla_nest_end(msg, freqs);
9235
9236         if (req->n_match_sets) {
9237                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9238                 for (i = 0; i < req->n_match_sets; i++) {
9239                         match = nla_nest_start(msg, i);
9240                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9241                                 req->match_sets[i].ssid.ssid_len,
9242                                 req->match_sets[i].ssid.ssid);
9243                         nla_nest_end(msg, match);
9244                 }
9245                 nla_nest_end(msg, matches);
9246         }
9247
9248         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9249         if (!scan_plans)
9250                 return -ENOBUFS;
9251
9252         for (i = 0; i < req->n_scan_plans; i++) {
9253                 scan_plan = nla_nest_start(msg, i + 1);
9254                 if (!scan_plan ||
9255                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9256                                 req->scan_plans[i].interval) ||
9257                     (req->scan_plans[i].iterations &&
9258                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9259                                  req->scan_plans[i].iterations)))
9260                         return -ENOBUFS;
9261                 nla_nest_end(msg, scan_plan);
9262         }
9263         nla_nest_end(msg, scan_plans);
9264
9265         nla_nest_end(msg, nd);
9266
9267         return 0;
9268 }
9269
9270 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9271 {
9272         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9273         struct sk_buff *msg;
9274         void *hdr;
9275         u32 size = NLMSG_DEFAULT_SIZE;
9276
9277         if (!rdev->wiphy.wowlan)
9278                 return -EOPNOTSUPP;
9279
9280         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9281                 /* adjust size to have room for all the data */
9282                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9283                         rdev->wiphy.wowlan_config->tcp->payload_len +
9284                         rdev->wiphy.wowlan_config->tcp->wake_len +
9285                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9286         }
9287
9288         msg = nlmsg_new(size, GFP_KERNEL);
9289         if (!msg)
9290                 return -ENOMEM;
9291
9292         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9293                              NL80211_CMD_GET_WOWLAN);
9294         if (!hdr)
9295                 goto nla_put_failure;
9296
9297         if (rdev->wiphy.wowlan_config) {
9298                 struct nlattr *nl_wowlan;
9299
9300                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9301                 if (!nl_wowlan)
9302                         goto nla_put_failure;
9303
9304                 if ((rdev->wiphy.wowlan_config->any &&
9305                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9306                     (rdev->wiphy.wowlan_config->disconnect &&
9307                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9308                     (rdev->wiphy.wowlan_config->magic_pkt &&
9309                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9310                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9311                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9312                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9313                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9314                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9315                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9316                     (rdev->wiphy.wowlan_config->rfkill_release &&
9317                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9318                         goto nla_put_failure;
9319
9320                 if (nl80211_send_wowlan_patterns(msg, rdev))
9321                         goto nla_put_failure;
9322
9323                 if (nl80211_send_wowlan_tcp(msg,
9324                                             rdev->wiphy.wowlan_config->tcp))
9325                         goto nla_put_failure;
9326
9327                 if (nl80211_send_wowlan_nd(
9328                             msg,
9329                             rdev->wiphy.wowlan_config->nd_config))
9330                         goto nla_put_failure;
9331
9332                 nla_nest_end(msg, nl_wowlan);
9333         }
9334
9335         genlmsg_end(msg, hdr);
9336         return genlmsg_reply(msg, info);
9337
9338 nla_put_failure:
9339         nlmsg_free(msg);
9340         return -ENOBUFS;
9341 }
9342
9343 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9344                                     struct nlattr *attr,
9345                                     struct cfg80211_wowlan *trig)
9346 {
9347         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9348         struct cfg80211_wowlan_tcp *cfg;
9349         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9350         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9351         u32 size;
9352         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9353         int err, port;
9354
9355         if (!rdev->wiphy.wowlan->tcp)
9356                 return -EINVAL;
9357
9358         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9359                         nla_data(attr), nla_len(attr),
9360                         nl80211_wowlan_tcp_policy);
9361         if (err)
9362                 return err;
9363
9364         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9365             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9366             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9367             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9368             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9369             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9370             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9371             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9372                 return -EINVAL;
9373
9374         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9375         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9376                 return -EINVAL;
9377
9378         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9379                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9380             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9381                 return -EINVAL;
9382
9383         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9384         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9385                 return -EINVAL;
9386
9387         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9388         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9389                 return -EINVAL;
9390
9391         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9392                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9393
9394                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9395                 tokens_size = tokln - sizeof(*tok);
9396
9397                 if (!tok->len || tokens_size % tok->len)
9398                         return -EINVAL;
9399                 if (!rdev->wiphy.wowlan->tcp->tok)
9400                         return -EINVAL;
9401                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9402                         return -EINVAL;
9403                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9404                         return -EINVAL;
9405                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9406                         return -EINVAL;
9407                 if (tok->offset + tok->len > data_size)
9408                         return -EINVAL;
9409         }
9410
9411         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9412                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9413                 if (!rdev->wiphy.wowlan->tcp->seq)
9414                         return -EINVAL;
9415                 if (seq->len == 0 || seq->len > 4)
9416                         return -EINVAL;
9417                 if (seq->len + seq->offset > data_size)
9418                         return -EINVAL;
9419         }
9420
9421         size = sizeof(*cfg);
9422         size += data_size;
9423         size += wake_size + wake_mask_size;
9424         size += tokens_size;
9425
9426         cfg = kzalloc(size, GFP_KERNEL);
9427         if (!cfg)
9428                 return -ENOMEM;
9429         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9430         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9431         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9432                ETH_ALEN);
9433         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9434                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9435         else
9436                 port = 0;
9437 #ifdef CONFIG_INET
9438         /* allocate a socket and port for it and use it */
9439         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9440                             IPPROTO_TCP, &cfg->sock, 1);
9441         if (err) {
9442                 kfree(cfg);
9443                 return err;
9444         }
9445         if (inet_csk_get_port(cfg->sock->sk, port)) {
9446                 sock_release(cfg->sock);
9447                 kfree(cfg);
9448                 return -EADDRINUSE;
9449         }
9450         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9451 #else
9452         if (!port) {
9453                 kfree(cfg);
9454                 return -EINVAL;
9455         }
9456         cfg->src_port = port;
9457 #endif
9458
9459         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9460         cfg->payload_len = data_size;
9461         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9462         memcpy((void *)cfg->payload,
9463                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9464                data_size);
9465         if (seq)
9466                 cfg->payload_seq = *seq;
9467         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9468         cfg->wake_len = wake_size;
9469         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9470         memcpy((void *)cfg->wake_data,
9471                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9472                wake_size);
9473         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9474                          data_size + wake_size;
9475         memcpy((void *)cfg->wake_mask,
9476                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9477                wake_mask_size);
9478         if (tok) {
9479                 cfg->tokens_size = tokens_size;
9480                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9481         }
9482
9483         trig->tcp = cfg;
9484
9485         return 0;
9486 }
9487
9488 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9489                                    const struct wiphy_wowlan_support *wowlan,
9490                                    struct nlattr *attr,
9491                                    struct cfg80211_wowlan *trig)
9492 {
9493         struct nlattr **tb;
9494         int err;
9495
9496         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9497         if (!tb)
9498                 return -ENOMEM;
9499
9500         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9501                 err = -EOPNOTSUPP;
9502                 goto out;
9503         }
9504
9505         err = nla_parse(tb, NL80211_ATTR_MAX,
9506                         nla_data(attr), nla_len(attr),
9507                         nl80211_policy);
9508         if (err)
9509                 goto out;
9510
9511         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9512         err = PTR_ERR_OR_ZERO(trig->nd_config);
9513         if (err)
9514                 trig->nd_config = NULL;
9515
9516 out:
9517         kfree(tb);
9518         return err;
9519 }
9520
9521 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9522 {
9523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9524         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9525         struct cfg80211_wowlan new_triggers = {};
9526         struct cfg80211_wowlan *ntrig;
9527         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9528         int err, i;
9529         bool prev_enabled = rdev->wiphy.wowlan_config;
9530         bool regular = false;
9531
9532         if (!wowlan)
9533                 return -EOPNOTSUPP;
9534
9535         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9536                 cfg80211_rdev_free_wowlan(rdev);
9537                 rdev->wiphy.wowlan_config = NULL;
9538                 goto set_wakeup;
9539         }
9540
9541         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9542                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9543                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9544                         nl80211_wowlan_policy);
9545         if (err)
9546                 return err;
9547
9548         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9549                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9550                         return -EINVAL;
9551                 new_triggers.any = true;
9552         }
9553
9554         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9555                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9556                         return -EINVAL;
9557                 new_triggers.disconnect = true;
9558                 regular = true;
9559         }
9560
9561         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9562                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9563                         return -EINVAL;
9564                 new_triggers.magic_pkt = true;
9565                 regular = true;
9566         }
9567
9568         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9569                 return -EINVAL;
9570
9571         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9572                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9573                         return -EINVAL;
9574                 new_triggers.gtk_rekey_failure = true;
9575                 regular = true;
9576         }
9577
9578         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9579                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9580                         return -EINVAL;
9581                 new_triggers.eap_identity_req = true;
9582                 regular = true;
9583         }
9584
9585         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9586                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9587                         return -EINVAL;
9588                 new_triggers.four_way_handshake = true;
9589                 regular = true;
9590         }
9591
9592         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9593                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9594                         return -EINVAL;
9595                 new_triggers.rfkill_release = true;
9596                 regular = true;
9597         }
9598
9599         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9600                 struct nlattr *pat;
9601                 int n_patterns = 0;
9602                 int rem, pat_len, mask_len, pkt_offset;
9603                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9604
9605                 regular = true;
9606
9607                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9608                                     rem)
9609                         n_patterns++;
9610                 if (n_patterns > wowlan->n_patterns)
9611                         return -EINVAL;
9612
9613                 new_triggers.patterns = kcalloc(n_patterns,
9614                                                 sizeof(new_triggers.patterns[0]),
9615                                                 GFP_KERNEL);
9616                 if (!new_triggers.patterns)
9617                         return -ENOMEM;
9618
9619                 new_triggers.n_patterns = n_patterns;
9620                 i = 0;
9621
9622                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9623                                     rem) {
9624                         u8 *mask_pat;
9625
9626                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9627                                   nla_len(pat), NULL);
9628                         err = -EINVAL;
9629                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9630                             !pat_tb[NL80211_PKTPAT_PATTERN])
9631                                 goto error;
9632                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9633                         mask_len = DIV_ROUND_UP(pat_len, 8);
9634                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9635                                 goto error;
9636                         if (pat_len > wowlan->pattern_max_len ||
9637                             pat_len < wowlan->pattern_min_len)
9638                                 goto error;
9639
9640                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9641                                 pkt_offset = 0;
9642                         else
9643                                 pkt_offset = nla_get_u32(
9644                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9645                         if (pkt_offset > wowlan->max_pkt_offset)
9646                                 goto error;
9647                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9648
9649                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9650                         if (!mask_pat) {
9651                                 err = -ENOMEM;
9652                                 goto error;
9653                         }
9654                         new_triggers.patterns[i].mask = mask_pat;
9655                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9656                                mask_len);
9657                         mask_pat += mask_len;
9658                         new_triggers.patterns[i].pattern = mask_pat;
9659                         new_triggers.patterns[i].pattern_len = pat_len;
9660                         memcpy(mask_pat,
9661                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9662                                pat_len);
9663                         i++;
9664                 }
9665         }
9666
9667         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9668                 regular = true;
9669                 err = nl80211_parse_wowlan_tcp(
9670                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9671                         &new_triggers);
9672                 if (err)
9673                         goto error;
9674         }
9675
9676         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9677                 regular = true;
9678                 err = nl80211_parse_wowlan_nd(
9679                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9680                         &new_triggers);
9681                 if (err)
9682                         goto error;
9683         }
9684
9685         /* The 'any' trigger means the device continues operating more or less
9686          * as in its normal operation mode and wakes up the host on most of the
9687          * normal interrupts (like packet RX, ...)
9688          * It therefore makes little sense to combine with the more constrained
9689          * wakeup trigger modes.
9690          */
9691         if (new_triggers.any && regular) {
9692                 err = -EINVAL;
9693                 goto error;
9694         }
9695
9696         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9697         if (!ntrig) {
9698                 err = -ENOMEM;
9699                 goto error;
9700         }
9701         cfg80211_rdev_free_wowlan(rdev);
9702         rdev->wiphy.wowlan_config = ntrig;
9703
9704  set_wakeup:
9705         if (rdev->ops->set_wakeup &&
9706             prev_enabled != !!rdev->wiphy.wowlan_config)
9707                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9708
9709         return 0;
9710  error:
9711         for (i = 0; i < new_triggers.n_patterns; i++)
9712                 kfree(new_triggers.patterns[i].mask);
9713         kfree(new_triggers.patterns);
9714         if (new_triggers.tcp && new_triggers.tcp->sock)
9715                 sock_release(new_triggers.tcp->sock);
9716         kfree(new_triggers.tcp);
9717         kfree(new_triggers.nd_config);
9718         return err;
9719 }
9720 #endif
9721
9722 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9723                                        struct cfg80211_registered_device *rdev)
9724 {
9725         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9726         int i, j, pat_len;
9727         struct cfg80211_coalesce_rules *rule;
9728
9729         if (!rdev->coalesce->n_rules)
9730                 return 0;
9731
9732         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9733         if (!nl_rules)
9734                 return -ENOBUFS;
9735
9736         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9737                 nl_rule = nla_nest_start(msg, i + 1);
9738                 if (!nl_rule)
9739                         return -ENOBUFS;
9740
9741                 rule = &rdev->coalesce->rules[i];
9742                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9743                                 rule->delay))
9744                         return -ENOBUFS;
9745
9746                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9747                                 rule->condition))
9748                         return -ENOBUFS;
9749
9750                 nl_pats = nla_nest_start(msg,
9751                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9752                 if (!nl_pats)
9753                         return -ENOBUFS;
9754
9755                 for (j = 0; j < rule->n_patterns; j++) {
9756                         nl_pat = nla_nest_start(msg, j + 1);
9757                         if (!nl_pat)
9758                                 return -ENOBUFS;
9759                         pat_len = rule->patterns[j].pattern_len;
9760                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9761                                     DIV_ROUND_UP(pat_len, 8),
9762                                     rule->patterns[j].mask) ||
9763                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9764                                     rule->patterns[j].pattern) ||
9765                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9766                                         rule->patterns[j].pkt_offset))
9767                                 return -ENOBUFS;
9768                         nla_nest_end(msg, nl_pat);
9769                 }
9770                 nla_nest_end(msg, nl_pats);
9771                 nla_nest_end(msg, nl_rule);
9772         }
9773         nla_nest_end(msg, nl_rules);
9774
9775         return 0;
9776 }
9777
9778 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9779 {
9780         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9781         struct sk_buff *msg;
9782         void *hdr;
9783
9784         if (!rdev->wiphy.coalesce)
9785                 return -EOPNOTSUPP;
9786
9787         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9788         if (!msg)
9789                 return -ENOMEM;
9790
9791         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9792                              NL80211_CMD_GET_COALESCE);
9793         if (!hdr)
9794                 goto nla_put_failure;
9795
9796         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9797                 goto nla_put_failure;
9798
9799         genlmsg_end(msg, hdr);
9800         return genlmsg_reply(msg, info);
9801
9802 nla_put_failure:
9803         nlmsg_free(msg);
9804         return -ENOBUFS;
9805 }
9806
9807 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9808 {
9809         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9810         int i, j;
9811         struct cfg80211_coalesce_rules *rule;
9812
9813         if (!coalesce)
9814                 return;
9815
9816         for (i = 0; i < coalesce->n_rules; i++) {
9817                 rule = &coalesce->rules[i];
9818                 for (j = 0; j < rule->n_patterns; j++)
9819                         kfree(rule->patterns[j].mask);
9820                 kfree(rule->patterns);
9821         }
9822         kfree(coalesce->rules);
9823         kfree(coalesce);
9824         rdev->coalesce = NULL;
9825 }
9826
9827 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9828                                        struct nlattr *rule,
9829                                        struct cfg80211_coalesce_rules *new_rule)
9830 {
9831         int err, i;
9832         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9833         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9834         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9835         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9836
9837         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9838                         nla_len(rule), nl80211_coalesce_policy);
9839         if (err)
9840                 return err;
9841
9842         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9843                 new_rule->delay =
9844                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9845         if (new_rule->delay > coalesce->max_delay)
9846                 return -EINVAL;
9847
9848         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9849                 new_rule->condition =
9850                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9851         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9852             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9853                 return -EINVAL;
9854
9855         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9856                 return -EINVAL;
9857
9858         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9859                             rem)
9860                 n_patterns++;
9861         if (n_patterns > coalesce->n_patterns)
9862                 return -EINVAL;
9863
9864         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9865                                      GFP_KERNEL);
9866         if (!new_rule->patterns)
9867                 return -ENOMEM;
9868
9869         new_rule->n_patterns = n_patterns;
9870         i = 0;
9871
9872         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9873                             rem) {
9874                 u8 *mask_pat;
9875
9876                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9877                           nla_len(pat), NULL);
9878                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9879                     !pat_tb[NL80211_PKTPAT_PATTERN])
9880                         return -EINVAL;
9881                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9882                 mask_len = DIV_ROUND_UP(pat_len, 8);
9883                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9884                         return -EINVAL;
9885                 if (pat_len > coalesce->pattern_max_len ||
9886                     pat_len < coalesce->pattern_min_len)
9887                         return -EINVAL;
9888
9889                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9890                         pkt_offset = 0;
9891                 else
9892                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9893                 if (pkt_offset > coalesce->max_pkt_offset)
9894                         return -EINVAL;
9895                 new_rule->patterns[i].pkt_offset = pkt_offset;
9896
9897                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9898                 if (!mask_pat)
9899                         return -ENOMEM;
9900
9901                 new_rule->patterns[i].mask = mask_pat;
9902                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9903                        mask_len);
9904
9905                 mask_pat += mask_len;
9906                 new_rule->patterns[i].pattern = mask_pat;
9907                 new_rule->patterns[i].pattern_len = pat_len;
9908                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9909                        pat_len);
9910                 i++;
9911         }
9912
9913         return 0;
9914 }
9915
9916 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9917 {
9918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9919         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9920         struct cfg80211_coalesce new_coalesce = {};
9921         struct cfg80211_coalesce *n_coalesce;
9922         int err, rem_rule, n_rules = 0, i, j;
9923         struct nlattr *rule;
9924         struct cfg80211_coalesce_rules *tmp_rule;
9925
9926         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9927                 return -EOPNOTSUPP;
9928
9929         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9930                 cfg80211_rdev_free_coalesce(rdev);
9931                 rdev_set_coalesce(rdev, NULL);
9932                 return 0;
9933         }
9934
9935         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9936                             rem_rule)
9937                 n_rules++;
9938         if (n_rules > coalesce->n_rules)
9939                 return -EINVAL;
9940
9941         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9942                                      GFP_KERNEL);
9943         if (!new_coalesce.rules)
9944                 return -ENOMEM;
9945
9946         new_coalesce.n_rules = n_rules;
9947         i = 0;
9948
9949         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9950                             rem_rule) {
9951                 err = nl80211_parse_coalesce_rule(rdev, rule,
9952                                                   &new_coalesce.rules[i]);
9953                 if (err)
9954                         goto error;
9955
9956                 i++;
9957         }
9958
9959         err = rdev_set_coalesce(rdev, &new_coalesce);
9960         if (err)
9961                 goto error;
9962
9963         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9964         if (!n_coalesce) {
9965                 err = -ENOMEM;
9966                 goto error;
9967         }
9968         cfg80211_rdev_free_coalesce(rdev);
9969         rdev->coalesce = n_coalesce;
9970
9971         return 0;
9972 error:
9973         for (i = 0; i < new_coalesce.n_rules; i++) {
9974                 tmp_rule = &new_coalesce.rules[i];
9975                 for (j = 0; j < tmp_rule->n_patterns; j++)
9976                         kfree(tmp_rule->patterns[j].mask);
9977                 kfree(tmp_rule->patterns);
9978         }
9979         kfree(new_coalesce.rules);
9980
9981         return err;
9982 }
9983
9984 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9985 {
9986         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9987         struct net_device *dev = info->user_ptr[1];
9988         struct wireless_dev *wdev = dev->ieee80211_ptr;
9989         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9990         struct cfg80211_gtk_rekey_data rekey_data;
9991         int err;
9992
9993         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9994                 return -EINVAL;
9995
9996         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9997                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9998                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9999                         nl80211_rekey_policy);
10000         if (err)
10001                 return err;
10002
10003         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10004                 return -ERANGE;
10005         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10006                 return -ERANGE;
10007         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10008                 return -ERANGE;
10009
10010         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10011         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10012         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10013
10014         wdev_lock(wdev);
10015         if (!wdev->current_bss) {
10016                 err = -ENOTCONN;
10017                 goto out;
10018         }
10019
10020         if (!rdev->ops->set_rekey_data) {
10021                 err = -EOPNOTSUPP;
10022                 goto out;
10023         }
10024
10025         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10026  out:
10027         wdev_unlock(wdev);
10028         return err;
10029 }
10030
10031 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10032                                              struct genl_info *info)
10033 {
10034         struct net_device *dev = info->user_ptr[1];
10035         struct wireless_dev *wdev = dev->ieee80211_ptr;
10036
10037         if (wdev->iftype != NL80211_IFTYPE_AP &&
10038             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10039                 return -EINVAL;
10040
10041         if (wdev->ap_unexpected_nlportid)
10042                 return -EBUSY;
10043
10044         wdev->ap_unexpected_nlportid = info->snd_portid;
10045         return 0;
10046 }
10047
10048 static int nl80211_probe_client(struct sk_buff *skb,
10049                                 struct genl_info *info)
10050 {
10051         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10052         struct net_device *dev = info->user_ptr[1];
10053         struct wireless_dev *wdev = dev->ieee80211_ptr;
10054         struct sk_buff *msg;
10055         void *hdr;
10056         const u8 *addr;
10057         u64 cookie;
10058         int err;
10059
10060         if (wdev->iftype != NL80211_IFTYPE_AP &&
10061             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10062                 return -EOPNOTSUPP;
10063
10064         if (!info->attrs[NL80211_ATTR_MAC])
10065                 return -EINVAL;
10066
10067         if (!rdev->ops->probe_client)
10068                 return -EOPNOTSUPP;
10069
10070         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10071         if (!msg)
10072                 return -ENOMEM;
10073
10074         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10075                              NL80211_CMD_PROBE_CLIENT);
10076         if (!hdr) {
10077                 err = -ENOBUFS;
10078                 goto free_msg;
10079         }
10080
10081         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10082
10083         err = rdev_probe_client(rdev, dev, addr, &cookie);
10084         if (err)
10085                 goto free_msg;
10086
10087         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10088                               NL80211_ATTR_PAD))
10089                 goto nla_put_failure;
10090
10091         genlmsg_end(msg, hdr);
10092
10093         return genlmsg_reply(msg, info);
10094
10095  nla_put_failure:
10096         err = -ENOBUFS;
10097  free_msg:
10098         nlmsg_free(msg);
10099         return err;
10100 }
10101
10102 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10103 {
10104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10105         struct cfg80211_beacon_registration *reg, *nreg;
10106         int rv;
10107
10108         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10109                 return -EOPNOTSUPP;
10110
10111         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10112         if (!nreg)
10113                 return -ENOMEM;
10114
10115         /* First, check if already registered. */
10116         spin_lock_bh(&rdev->beacon_registrations_lock);
10117         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10118                 if (reg->nlportid == info->snd_portid) {
10119                         rv = -EALREADY;
10120                         goto out_err;
10121                 }
10122         }
10123         /* Add it to the list */
10124         nreg->nlportid = info->snd_portid;
10125         list_add(&nreg->list, &rdev->beacon_registrations);
10126
10127         spin_unlock_bh(&rdev->beacon_registrations_lock);
10128
10129         return 0;
10130 out_err:
10131         spin_unlock_bh(&rdev->beacon_registrations_lock);
10132         kfree(nreg);
10133         return rv;
10134 }
10135
10136 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10137 {
10138         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10139         struct wireless_dev *wdev = info->user_ptr[1];
10140         int err;
10141
10142         if (!rdev->ops->start_p2p_device)
10143                 return -EOPNOTSUPP;
10144
10145         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10146                 return -EOPNOTSUPP;
10147
10148         if (wdev->p2p_started)
10149                 return 0;
10150
10151         if (rfkill_blocked(rdev->rfkill))
10152                 return -ERFKILL;
10153
10154         err = rdev_start_p2p_device(rdev, wdev);
10155         if (err)
10156                 return err;
10157
10158         wdev->p2p_started = true;
10159         rdev->opencount++;
10160
10161         return 0;
10162 }
10163
10164 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10165 {
10166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10167         struct wireless_dev *wdev = info->user_ptr[1];
10168
10169         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10170                 return -EOPNOTSUPP;
10171
10172         if (!rdev->ops->stop_p2p_device)
10173                 return -EOPNOTSUPP;
10174
10175         cfg80211_stop_p2p_device(rdev, wdev);
10176
10177         return 0;
10178 }
10179
10180 static int nl80211_get_protocol_features(struct sk_buff *skb,
10181                                          struct genl_info *info)
10182 {
10183         void *hdr;
10184         struct sk_buff *msg;
10185
10186         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10187         if (!msg)
10188                 return -ENOMEM;
10189
10190         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10191                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10192         if (!hdr)
10193                 goto nla_put_failure;
10194
10195         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10196                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10197                 goto nla_put_failure;
10198
10199         genlmsg_end(msg, hdr);
10200         return genlmsg_reply(msg, info);
10201
10202  nla_put_failure:
10203         kfree_skb(msg);
10204         return -ENOBUFS;
10205 }
10206
10207 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10208 {
10209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10210         struct cfg80211_update_ft_ies_params ft_params;
10211         struct net_device *dev = info->user_ptr[1];
10212
10213         if (!rdev->ops->update_ft_ies)
10214                 return -EOPNOTSUPP;
10215
10216         if (!info->attrs[NL80211_ATTR_MDID] ||
10217             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10218                 return -EINVAL;
10219
10220         memset(&ft_params, 0, sizeof(ft_params));
10221         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10222         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10223         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10224
10225         return rdev_update_ft_ies(rdev, dev, &ft_params);
10226 }
10227
10228 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10229                                        struct genl_info *info)
10230 {
10231         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10232         struct wireless_dev *wdev = info->user_ptr[1];
10233         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10234         u16 duration;
10235         int ret;
10236
10237         if (!rdev->ops->crit_proto_start)
10238                 return -EOPNOTSUPP;
10239
10240         if (WARN_ON(!rdev->ops->crit_proto_stop))
10241                 return -EINVAL;
10242
10243         if (rdev->crit_proto_nlportid)
10244                 return -EBUSY;
10245
10246         /* determine protocol if provided */
10247         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10248                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10249
10250         if (proto >= NUM_NL80211_CRIT_PROTO)
10251                 return -EINVAL;
10252
10253         /* timeout must be provided */
10254         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10255                 return -EINVAL;
10256
10257         duration =
10258                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10259
10260         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10261                 return -ERANGE;
10262
10263         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10264         if (!ret)
10265                 rdev->crit_proto_nlportid = info->snd_portid;
10266
10267         return ret;
10268 }
10269
10270 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10271                                       struct genl_info *info)
10272 {
10273         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10274         struct wireless_dev *wdev = info->user_ptr[1];
10275
10276         if (!rdev->ops->crit_proto_stop)
10277                 return -EOPNOTSUPP;
10278
10279         if (rdev->crit_proto_nlportid) {
10280                 rdev->crit_proto_nlportid = 0;
10281                 rdev_crit_proto_stop(rdev, wdev);
10282         }
10283         return 0;
10284 }
10285
10286 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10287 {
10288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10289         struct wireless_dev *wdev =
10290                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10291         int i, err;
10292         u32 vid, subcmd;
10293
10294         if (!rdev->wiphy.vendor_commands)
10295                 return -EOPNOTSUPP;
10296
10297         if (IS_ERR(wdev)) {
10298                 err = PTR_ERR(wdev);
10299                 if (err != -EINVAL)
10300                         return err;
10301                 wdev = NULL;
10302         } else if (wdev->wiphy != &rdev->wiphy) {
10303                 return -EINVAL;
10304         }
10305
10306         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10307             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10308                 return -EINVAL;
10309
10310         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10311         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10312         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10313                 const struct wiphy_vendor_command *vcmd;
10314                 void *data = NULL;
10315                 int len = 0;
10316
10317                 vcmd = &rdev->wiphy.vendor_commands[i];
10318
10319                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10320                         continue;
10321
10322                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10323                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10324                         if (!wdev)
10325                                 return -EINVAL;
10326                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10327                             !wdev->netdev)
10328                                 return -EINVAL;
10329
10330                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10331                                 if (wdev->netdev &&
10332                                     !netif_running(wdev->netdev))
10333                                         return -ENETDOWN;
10334                                 if (!wdev->netdev && !wdev->p2p_started)
10335                                         return -ENETDOWN;
10336                         }
10337
10338                         if (!vcmd->doit)
10339                                 return -EOPNOTSUPP;
10340                 } else {
10341                         wdev = NULL;
10342                 }
10343
10344                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10345                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10346                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10347                 }
10348
10349                 rdev->cur_cmd_info = info;
10350                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10351                                                           data, len);
10352                 rdev->cur_cmd_info = NULL;
10353                 return err;
10354         }
10355
10356         return -EOPNOTSUPP;
10357 }
10358
10359 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10360                                        struct netlink_callback *cb,
10361                                        struct cfg80211_registered_device **rdev,
10362                                        struct wireless_dev **wdev)
10363 {
10364         u32 vid, subcmd;
10365         unsigned int i;
10366         int vcmd_idx = -1;
10367         int err;
10368         void *data = NULL;
10369         unsigned int data_len = 0;
10370
10371         rtnl_lock();
10372
10373         if (cb->args[0]) {
10374                 /* subtract the 1 again here */
10375                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10376                 struct wireless_dev *tmp;
10377
10378                 if (!wiphy) {
10379                         err = -ENODEV;
10380                         goto out_unlock;
10381                 }
10382                 *rdev = wiphy_to_rdev(wiphy);
10383                 *wdev = NULL;
10384
10385                 if (cb->args[1]) {
10386                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10387                                 if (tmp->identifier == cb->args[1] - 1) {
10388                                         *wdev = tmp;
10389                                         break;
10390                                 }
10391                         }
10392                 }
10393
10394                 /* keep rtnl locked in successful case */
10395                 return 0;
10396         }
10397
10398         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10399                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10400                           nl80211_policy);
10401         if (err)
10402                 goto out_unlock;
10403
10404         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10405             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10406                 err = -EINVAL;
10407                 goto out_unlock;
10408         }
10409
10410         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10411                                            nl80211_fam.attrbuf);
10412         if (IS_ERR(*wdev))
10413                 *wdev = NULL;
10414
10415         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10416                                            nl80211_fam.attrbuf);
10417         if (IS_ERR(*rdev)) {
10418                 err = PTR_ERR(*rdev);
10419                 goto out_unlock;
10420         }
10421
10422         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10423         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10424
10425         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10426                 const struct wiphy_vendor_command *vcmd;
10427
10428                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10429
10430                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10431                         continue;
10432
10433                 if (!vcmd->dumpit) {
10434                         err = -EOPNOTSUPP;
10435                         goto out_unlock;
10436                 }
10437
10438                 vcmd_idx = i;
10439                 break;
10440         }
10441
10442         if (vcmd_idx < 0) {
10443                 err = -EOPNOTSUPP;
10444                 goto out_unlock;
10445         }
10446
10447         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10448                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10449                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10450         }
10451
10452         /* 0 is the first index - add 1 to parse only once */
10453         cb->args[0] = (*rdev)->wiphy_idx + 1;
10454         /* add 1 to know if it was NULL */
10455         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10456         cb->args[2] = vcmd_idx;
10457         cb->args[3] = (unsigned long)data;
10458         cb->args[4] = data_len;
10459
10460         /* keep rtnl locked in successful case */
10461         return 0;
10462  out_unlock:
10463         rtnl_unlock();
10464         return err;
10465 }
10466
10467 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10468                                    struct netlink_callback *cb)
10469 {
10470         struct cfg80211_registered_device *rdev;
10471         struct wireless_dev *wdev;
10472         unsigned int vcmd_idx;
10473         const struct wiphy_vendor_command *vcmd;
10474         void *data;
10475         int data_len;
10476         int err;
10477         struct nlattr *vendor_data;
10478
10479         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10480         if (err)
10481                 return err;
10482
10483         vcmd_idx = cb->args[2];
10484         data = (void *)cb->args[3];
10485         data_len = cb->args[4];
10486         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10487
10488         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10489                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10490                 if (!wdev)
10491                         return -EINVAL;
10492                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10493                     !wdev->netdev)
10494                         return -EINVAL;
10495
10496                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10497                         if (wdev->netdev &&
10498                             !netif_running(wdev->netdev))
10499                                 return -ENETDOWN;
10500                         if (!wdev->netdev && !wdev->p2p_started)
10501                                 return -ENETDOWN;
10502                 }
10503         }
10504
10505         while (1) {
10506                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10507                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10508                                            NL80211_CMD_VENDOR);
10509                 if (!hdr)
10510                         break;
10511
10512                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10513                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10514                                                wdev_id(wdev),
10515                                                NL80211_ATTR_PAD))) {
10516                         genlmsg_cancel(skb, hdr);
10517                         break;
10518                 }
10519
10520                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10521                 if (!vendor_data) {
10522                         genlmsg_cancel(skb, hdr);
10523                         break;
10524                 }
10525
10526                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10527                                    (unsigned long *)&cb->args[5]);
10528                 nla_nest_end(skb, vendor_data);
10529
10530                 if (err == -ENOBUFS || err == -ENOENT) {
10531                         genlmsg_cancel(skb, hdr);
10532                         break;
10533                 } else if (err) {
10534                         genlmsg_cancel(skb, hdr);
10535                         goto out;
10536                 }
10537
10538                 genlmsg_end(skb, hdr);
10539         }
10540
10541         err = skb->len;
10542  out:
10543         rtnl_unlock();
10544         return err;
10545 }
10546
10547 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10548                                            enum nl80211_commands cmd,
10549                                            enum nl80211_attrs attr,
10550                                            int approxlen)
10551 {
10552         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10553
10554         if (WARN_ON(!rdev->cur_cmd_info))
10555                 return NULL;
10556
10557         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10558                                            rdev->cur_cmd_info->snd_portid,
10559                                            rdev->cur_cmd_info->snd_seq,
10560                                            cmd, attr, NULL, GFP_KERNEL);
10561 }
10562 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10563
10564 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10565 {
10566         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10567         void *hdr = ((void **)skb->cb)[1];
10568         struct nlattr *data = ((void **)skb->cb)[2];
10569
10570         /* clear CB data for netlink core to own from now on */
10571         memset(skb->cb, 0, sizeof(skb->cb));
10572
10573         if (WARN_ON(!rdev->cur_cmd_info)) {
10574                 kfree_skb(skb);
10575                 return -EINVAL;
10576         }
10577
10578         nla_nest_end(skb, data);
10579         genlmsg_end(skb, hdr);
10580         return genlmsg_reply(skb, rdev->cur_cmd_info);
10581 }
10582 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10583
10584
10585 static int nl80211_set_qos_map(struct sk_buff *skb,
10586                                struct genl_info *info)
10587 {
10588         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10589         struct cfg80211_qos_map *qos_map = NULL;
10590         struct net_device *dev = info->user_ptr[1];
10591         u8 *pos, len, num_des, des_len, des;
10592         int ret;
10593
10594         if (!rdev->ops->set_qos_map)
10595                 return -EOPNOTSUPP;
10596
10597         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10598                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10599                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10600
10601                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10602                     len > IEEE80211_QOS_MAP_LEN_MAX)
10603                         return -EINVAL;
10604
10605                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10606                 if (!qos_map)
10607                         return -ENOMEM;
10608
10609                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10610                 if (num_des) {
10611                         des_len = num_des *
10612                                 sizeof(struct cfg80211_dscp_exception);
10613                         memcpy(qos_map->dscp_exception, pos, des_len);
10614                         qos_map->num_des = num_des;
10615                         for (des = 0; des < num_des; des++) {
10616                                 if (qos_map->dscp_exception[des].up > 7) {
10617                                         kfree(qos_map);
10618                                         return -EINVAL;
10619                                 }
10620                         }
10621                         pos += des_len;
10622                 }
10623                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10624         }
10625
10626         wdev_lock(dev->ieee80211_ptr);
10627         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10628         if (!ret)
10629                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10630         wdev_unlock(dev->ieee80211_ptr);
10631
10632         kfree(qos_map);
10633         return ret;
10634 }
10635
10636 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10637 {
10638         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10639         struct net_device *dev = info->user_ptr[1];
10640         struct wireless_dev *wdev = dev->ieee80211_ptr;
10641         const u8 *peer;
10642         u8 tsid, up;
10643         u16 admitted_time = 0;
10644         int err;
10645
10646         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10647                 return -EOPNOTSUPP;
10648
10649         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10650             !info->attrs[NL80211_ATTR_USER_PRIO])
10651                 return -EINVAL;
10652
10653         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10654         if (tsid >= IEEE80211_NUM_TIDS)
10655                 return -EINVAL;
10656
10657         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10658         if (up >= IEEE80211_NUM_UPS)
10659                 return -EINVAL;
10660
10661         /* WMM uses TIDs 0-7 even for TSPEC */
10662         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10663                 /* TODO: handle 802.11 TSPEC/admission control
10664                  * need more attributes for that (e.g. BA session requirement);
10665                  * change the WMM adminssion test above to allow both then
10666                  */
10667                 return -EINVAL;
10668         }
10669
10670         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10671
10672         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10673                 admitted_time =
10674                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10675                 if (!admitted_time)
10676                         return -EINVAL;
10677         }
10678
10679         wdev_lock(wdev);
10680         switch (wdev->iftype) {
10681         case NL80211_IFTYPE_STATION:
10682         case NL80211_IFTYPE_P2P_CLIENT:
10683                 if (wdev->current_bss)
10684                         break;
10685                 err = -ENOTCONN;
10686                 goto out;
10687         default:
10688                 err = -EOPNOTSUPP;
10689                 goto out;
10690         }
10691
10692         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10693
10694  out:
10695         wdev_unlock(wdev);
10696         return err;
10697 }
10698
10699 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10700 {
10701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10702         struct net_device *dev = info->user_ptr[1];
10703         struct wireless_dev *wdev = dev->ieee80211_ptr;
10704         const u8 *peer;
10705         u8 tsid;
10706         int err;
10707
10708         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10709                 return -EINVAL;
10710
10711         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10712         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10713
10714         wdev_lock(wdev);
10715         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10716         wdev_unlock(wdev);
10717
10718         return err;
10719 }
10720
10721 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10722                                        struct genl_info *info)
10723 {
10724         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10725         struct net_device *dev = info->user_ptr[1];
10726         struct wireless_dev *wdev = dev->ieee80211_ptr;
10727         struct cfg80211_chan_def chandef = {};
10728         const u8 *addr;
10729         u8 oper_class;
10730         int err;
10731
10732         if (!rdev->ops->tdls_channel_switch ||
10733             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10734                 return -EOPNOTSUPP;
10735
10736         switch (dev->ieee80211_ptr->iftype) {
10737         case NL80211_IFTYPE_STATION:
10738         case NL80211_IFTYPE_P2P_CLIENT:
10739                 break;
10740         default:
10741                 return -EOPNOTSUPP;
10742         }
10743
10744         if (!info->attrs[NL80211_ATTR_MAC] ||
10745             !info->attrs[NL80211_ATTR_OPER_CLASS])
10746                 return -EINVAL;
10747
10748         err = nl80211_parse_chandef(rdev, info, &chandef);
10749         if (err)
10750                 return err;
10751
10752         /*
10753          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10754          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10755          * specification is not defined for them.
10756          */
10757         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10758             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10759             chandef.width != NL80211_CHAN_WIDTH_20)
10760                 return -EINVAL;
10761
10762         /* we will be active on the TDLS link */
10763         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10764                                            wdev->iftype))
10765                 return -EINVAL;
10766
10767         /* don't allow switching to DFS channels */
10768         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10769                 return -EINVAL;
10770
10771         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10772         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10773
10774         wdev_lock(wdev);
10775         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10776         wdev_unlock(wdev);
10777
10778         return err;
10779 }
10780
10781 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10782                                               struct genl_info *info)
10783 {
10784         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10785         struct net_device *dev = info->user_ptr[1];
10786         struct wireless_dev *wdev = dev->ieee80211_ptr;
10787         const u8 *addr;
10788
10789         if (!rdev->ops->tdls_channel_switch ||
10790             !rdev->ops->tdls_cancel_channel_switch ||
10791             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10792                 return -EOPNOTSUPP;
10793
10794         switch (dev->ieee80211_ptr->iftype) {
10795         case NL80211_IFTYPE_STATION:
10796         case NL80211_IFTYPE_P2P_CLIENT:
10797                 break;
10798         default:
10799                 return -EOPNOTSUPP;
10800         }
10801
10802         if (!info->attrs[NL80211_ATTR_MAC])
10803                 return -EINVAL;
10804
10805         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10806
10807         wdev_lock(wdev);
10808         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10809         wdev_unlock(wdev);
10810
10811         return 0;
10812 }
10813
10814 #define NL80211_FLAG_NEED_WIPHY         0x01
10815 #define NL80211_FLAG_NEED_NETDEV        0x02
10816 #define NL80211_FLAG_NEED_RTNL          0x04
10817 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10818 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10819                                          NL80211_FLAG_CHECK_NETDEV_UP)
10820 #define NL80211_FLAG_NEED_WDEV          0x10
10821 /* If a netdev is associated, it must be UP, P2P must be started */
10822 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10823                                          NL80211_FLAG_CHECK_NETDEV_UP)
10824 #define NL80211_FLAG_CLEAR_SKB          0x20
10825
10826 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10827                             struct genl_info *info)
10828 {
10829         struct cfg80211_registered_device *rdev;
10830         struct wireless_dev *wdev;
10831         struct net_device *dev;
10832         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10833
10834         if (rtnl)
10835                 rtnl_lock();
10836
10837         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10838                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10839                 if (IS_ERR(rdev)) {
10840                         if (rtnl)
10841                                 rtnl_unlock();
10842                         return PTR_ERR(rdev);
10843                 }
10844                 info->user_ptr[0] = rdev;
10845         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10846                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10847                 ASSERT_RTNL();
10848
10849                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10850                                                   info->attrs);
10851                 if (IS_ERR(wdev)) {
10852                         if (rtnl)
10853                                 rtnl_unlock();
10854                         return PTR_ERR(wdev);
10855                 }
10856
10857                 dev = wdev->netdev;
10858                 rdev = wiphy_to_rdev(wdev->wiphy);
10859
10860                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10861                         if (!dev) {
10862                                 if (rtnl)
10863                                         rtnl_unlock();
10864                                 return -EINVAL;
10865                         }
10866
10867                         info->user_ptr[1] = dev;
10868                 } else {
10869                         info->user_ptr[1] = wdev;
10870                 }
10871
10872                 if (dev) {
10873                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10874                             !netif_running(dev)) {
10875                                 if (rtnl)
10876                                         rtnl_unlock();
10877                                 return -ENETDOWN;
10878                         }
10879
10880                         dev_hold(dev);
10881                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10882                         if (!wdev->p2p_started) {
10883                                 if (rtnl)
10884                                         rtnl_unlock();
10885                                 return -ENETDOWN;
10886                         }
10887                 }
10888
10889                 info->user_ptr[0] = rdev;
10890         }
10891
10892         return 0;
10893 }
10894
10895 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10896                               struct genl_info *info)
10897 {
10898         if (info->user_ptr[1]) {
10899                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10900                         struct wireless_dev *wdev = info->user_ptr[1];
10901
10902                         if (wdev->netdev)
10903                                 dev_put(wdev->netdev);
10904                 } else {
10905                         dev_put(info->user_ptr[1]);
10906                 }
10907         }
10908
10909         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10910                 rtnl_unlock();
10911
10912         /* If needed, clear the netlink message payload from the SKB
10913          * as it might contain key data that shouldn't stick around on
10914          * the heap after the SKB is freed. The netlink message header
10915          * is still needed for further processing, so leave it intact.
10916          */
10917         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10918                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10919
10920                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10921         }
10922 }
10923
10924 static const struct genl_ops nl80211_ops[] = {
10925         {
10926                 .cmd = NL80211_CMD_GET_WIPHY,
10927                 .doit = nl80211_get_wiphy,
10928                 .dumpit = nl80211_dump_wiphy,
10929                 .done = nl80211_dump_wiphy_done,
10930                 .policy = nl80211_policy,
10931                 /* can be retrieved by unprivileged users */
10932                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10933                                   NL80211_FLAG_NEED_RTNL,
10934         },
10935         {
10936                 .cmd = NL80211_CMD_SET_WIPHY,
10937                 .doit = nl80211_set_wiphy,
10938                 .policy = nl80211_policy,
10939                 .flags = GENL_ADMIN_PERM,
10940                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10941         },
10942         {
10943                 .cmd = NL80211_CMD_GET_INTERFACE,
10944                 .doit = nl80211_get_interface,
10945                 .dumpit = nl80211_dump_interface,
10946                 .policy = nl80211_policy,
10947                 /* can be retrieved by unprivileged users */
10948                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10949                                   NL80211_FLAG_NEED_RTNL,
10950         },
10951         {
10952                 .cmd = NL80211_CMD_SET_INTERFACE,
10953                 .doit = nl80211_set_interface,
10954                 .policy = nl80211_policy,
10955                 .flags = GENL_ADMIN_PERM,
10956                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10957                                   NL80211_FLAG_NEED_RTNL,
10958         },
10959         {
10960                 .cmd = NL80211_CMD_NEW_INTERFACE,
10961                 .doit = nl80211_new_interface,
10962                 .policy = nl80211_policy,
10963                 .flags = GENL_ADMIN_PERM,
10964                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10965                                   NL80211_FLAG_NEED_RTNL,
10966         },
10967         {
10968                 .cmd = NL80211_CMD_DEL_INTERFACE,
10969                 .doit = nl80211_del_interface,
10970                 .policy = nl80211_policy,
10971                 .flags = GENL_ADMIN_PERM,
10972                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10973                                   NL80211_FLAG_NEED_RTNL,
10974         },
10975         {
10976                 .cmd = NL80211_CMD_GET_KEY,
10977                 .doit = nl80211_get_key,
10978                 .policy = nl80211_policy,
10979                 .flags = GENL_ADMIN_PERM,
10980                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10981                                   NL80211_FLAG_NEED_RTNL,
10982         },
10983         {
10984                 .cmd = NL80211_CMD_SET_KEY,
10985                 .doit = nl80211_set_key,
10986                 .policy = nl80211_policy,
10987                 .flags = GENL_ADMIN_PERM,
10988                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10989                                   NL80211_FLAG_NEED_RTNL |
10990                                   NL80211_FLAG_CLEAR_SKB,
10991         },
10992         {
10993                 .cmd = NL80211_CMD_NEW_KEY,
10994                 .doit = nl80211_new_key,
10995                 .policy = nl80211_policy,
10996                 .flags = GENL_ADMIN_PERM,
10997                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10998                                   NL80211_FLAG_NEED_RTNL |
10999                                   NL80211_FLAG_CLEAR_SKB,
11000         },
11001         {
11002                 .cmd = NL80211_CMD_DEL_KEY,
11003                 .doit = nl80211_del_key,
11004                 .policy = nl80211_policy,
11005                 .flags = GENL_ADMIN_PERM,
11006                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11007                                   NL80211_FLAG_NEED_RTNL,
11008         },
11009         {
11010                 .cmd = NL80211_CMD_SET_BEACON,
11011                 .policy = nl80211_policy,
11012                 .flags = GENL_ADMIN_PERM,
11013                 .doit = nl80211_set_beacon,
11014                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11015                                   NL80211_FLAG_NEED_RTNL,
11016         },
11017         {
11018                 .cmd = NL80211_CMD_START_AP,
11019                 .policy = nl80211_policy,
11020                 .flags = GENL_ADMIN_PERM,
11021                 .doit = nl80211_start_ap,
11022                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11023                                   NL80211_FLAG_NEED_RTNL,
11024         },
11025         {
11026                 .cmd = NL80211_CMD_STOP_AP,
11027                 .policy = nl80211_policy,
11028                 .flags = GENL_ADMIN_PERM,
11029                 .doit = nl80211_stop_ap,
11030                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11031                                   NL80211_FLAG_NEED_RTNL,
11032         },
11033         {
11034                 .cmd = NL80211_CMD_GET_STATION,
11035                 .doit = nl80211_get_station,
11036                 .dumpit = nl80211_dump_station,
11037                 .policy = nl80211_policy,
11038                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11039                                   NL80211_FLAG_NEED_RTNL,
11040         },
11041         {
11042                 .cmd = NL80211_CMD_SET_STATION,
11043                 .doit = nl80211_set_station,
11044                 .policy = nl80211_policy,
11045                 .flags = GENL_ADMIN_PERM,
11046                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11047                                   NL80211_FLAG_NEED_RTNL,
11048         },
11049         {
11050                 .cmd = NL80211_CMD_NEW_STATION,
11051                 .doit = nl80211_new_station,
11052                 .policy = nl80211_policy,
11053                 .flags = GENL_ADMIN_PERM,
11054                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11055                                   NL80211_FLAG_NEED_RTNL,
11056         },
11057         {
11058                 .cmd = NL80211_CMD_DEL_STATION,
11059                 .doit = nl80211_del_station,
11060                 .policy = nl80211_policy,
11061                 .flags = GENL_ADMIN_PERM,
11062                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11063                                   NL80211_FLAG_NEED_RTNL,
11064         },
11065         {
11066                 .cmd = NL80211_CMD_GET_MPATH,
11067                 .doit = nl80211_get_mpath,
11068                 .dumpit = nl80211_dump_mpath,
11069                 .policy = nl80211_policy,
11070                 .flags = GENL_ADMIN_PERM,
11071                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11072                                   NL80211_FLAG_NEED_RTNL,
11073         },
11074         {
11075                 .cmd = NL80211_CMD_GET_MPP,
11076                 .doit = nl80211_get_mpp,
11077                 .dumpit = nl80211_dump_mpp,
11078                 .policy = nl80211_policy,
11079                 .flags = GENL_ADMIN_PERM,
11080                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11081                                   NL80211_FLAG_NEED_RTNL,
11082         },
11083         {
11084                 .cmd = NL80211_CMD_SET_MPATH,
11085                 .doit = nl80211_set_mpath,
11086                 .policy = nl80211_policy,
11087                 .flags = GENL_ADMIN_PERM,
11088                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11089                                   NL80211_FLAG_NEED_RTNL,
11090         },
11091         {
11092                 .cmd = NL80211_CMD_NEW_MPATH,
11093                 .doit = nl80211_new_mpath,
11094                 .policy = nl80211_policy,
11095                 .flags = GENL_ADMIN_PERM,
11096                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11097                                   NL80211_FLAG_NEED_RTNL,
11098         },
11099         {
11100                 .cmd = NL80211_CMD_DEL_MPATH,
11101                 .doit = nl80211_del_mpath,
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_SET_BSS,
11109                 .doit = nl80211_set_bss,
11110                 .policy = nl80211_policy,
11111                 .flags = GENL_ADMIN_PERM,
11112                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11113                                   NL80211_FLAG_NEED_RTNL,
11114         },
11115         {
11116                 .cmd = NL80211_CMD_GET_REG,
11117                 .doit = nl80211_get_reg_do,
11118                 .dumpit = nl80211_get_reg_dump,
11119                 .policy = nl80211_policy,
11120                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11121                 /* can be retrieved by unprivileged users */
11122         },
11123 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11124         {
11125                 .cmd = NL80211_CMD_SET_REG,
11126                 .doit = nl80211_set_reg,
11127                 .policy = nl80211_policy,
11128                 .flags = GENL_ADMIN_PERM,
11129                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11130         },
11131 #endif
11132         {
11133                 .cmd = NL80211_CMD_REQ_SET_REG,
11134                 .doit = nl80211_req_set_reg,
11135                 .policy = nl80211_policy,
11136                 .flags = GENL_ADMIN_PERM,
11137         },
11138         {
11139                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11140                 .doit = nl80211_get_mesh_config,
11141                 .policy = nl80211_policy,
11142                 /* can be retrieved by unprivileged users */
11143                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11144                                   NL80211_FLAG_NEED_RTNL,
11145         },
11146         {
11147                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11148                 .doit = nl80211_update_mesh_config,
11149                 .policy = nl80211_policy,
11150                 .flags = GENL_ADMIN_PERM,
11151                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11152                                   NL80211_FLAG_NEED_RTNL,
11153         },
11154         {
11155                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11156                 .doit = nl80211_trigger_scan,
11157                 .policy = nl80211_policy,
11158                 .flags = GENL_ADMIN_PERM,
11159                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11160                                   NL80211_FLAG_NEED_RTNL,
11161         },
11162         {
11163                 .cmd = NL80211_CMD_ABORT_SCAN,
11164                 .doit = nl80211_abort_scan,
11165                 .policy = nl80211_policy,
11166                 .flags = GENL_ADMIN_PERM,
11167                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11168                                   NL80211_FLAG_NEED_RTNL,
11169         },
11170         {
11171                 .cmd = NL80211_CMD_GET_SCAN,
11172                 .policy = nl80211_policy,
11173                 .dumpit = nl80211_dump_scan,
11174         },
11175         {
11176                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11177                 .doit = nl80211_start_sched_scan,
11178                 .policy = nl80211_policy,
11179                 .flags = GENL_ADMIN_PERM,
11180                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11181                                   NL80211_FLAG_NEED_RTNL,
11182         },
11183         {
11184                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11185                 .doit = nl80211_stop_sched_scan,
11186                 .policy = nl80211_policy,
11187                 .flags = GENL_ADMIN_PERM,
11188                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11189                                   NL80211_FLAG_NEED_RTNL,
11190         },
11191         {
11192                 .cmd = NL80211_CMD_AUTHENTICATE,
11193                 .doit = nl80211_authenticate,
11194                 .policy = nl80211_policy,
11195                 .flags = GENL_ADMIN_PERM,
11196                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11197                                   NL80211_FLAG_NEED_RTNL |
11198                                   NL80211_FLAG_CLEAR_SKB,
11199         },
11200         {
11201                 .cmd = NL80211_CMD_ASSOCIATE,
11202                 .doit = nl80211_associate,
11203                 .policy = nl80211_policy,
11204                 .flags = GENL_ADMIN_PERM,
11205                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11206                                   NL80211_FLAG_NEED_RTNL,
11207         },
11208         {
11209                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11210                 .doit = nl80211_deauthenticate,
11211                 .policy = nl80211_policy,
11212                 .flags = GENL_ADMIN_PERM,
11213                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11214                                   NL80211_FLAG_NEED_RTNL,
11215         },
11216         {
11217                 .cmd = NL80211_CMD_DISASSOCIATE,
11218                 .doit = nl80211_disassociate,
11219                 .policy = nl80211_policy,
11220                 .flags = GENL_ADMIN_PERM,
11221                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11222                                   NL80211_FLAG_NEED_RTNL,
11223         },
11224         {
11225                 .cmd = NL80211_CMD_JOIN_IBSS,
11226                 .doit = nl80211_join_ibss,
11227                 .policy = nl80211_policy,
11228                 .flags = GENL_ADMIN_PERM,
11229                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11230                                   NL80211_FLAG_NEED_RTNL,
11231         },
11232         {
11233                 .cmd = NL80211_CMD_LEAVE_IBSS,
11234                 .doit = nl80211_leave_ibss,
11235                 .policy = nl80211_policy,
11236                 .flags = GENL_ADMIN_PERM,
11237                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11238                                   NL80211_FLAG_NEED_RTNL,
11239         },
11240 #ifdef CONFIG_NL80211_TESTMODE
11241         {
11242                 .cmd = NL80211_CMD_TESTMODE,
11243                 .doit = nl80211_testmode_do,
11244                 .dumpit = nl80211_testmode_dump,
11245                 .policy = nl80211_policy,
11246                 .flags = GENL_ADMIN_PERM,
11247                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11248                                   NL80211_FLAG_NEED_RTNL,
11249         },
11250 #endif
11251         {
11252                 .cmd = NL80211_CMD_CONNECT,
11253                 .doit = nl80211_connect,
11254                 .policy = nl80211_policy,
11255                 .flags = GENL_ADMIN_PERM,
11256                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11257                                   NL80211_FLAG_NEED_RTNL,
11258         },
11259         {
11260                 .cmd = NL80211_CMD_DISCONNECT,
11261                 .doit = nl80211_disconnect,
11262                 .policy = nl80211_policy,
11263                 .flags = GENL_ADMIN_PERM,
11264                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11265                                   NL80211_FLAG_NEED_RTNL,
11266         },
11267         {
11268                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11269                 .doit = nl80211_wiphy_netns,
11270                 .policy = nl80211_policy,
11271                 .flags = GENL_ADMIN_PERM,
11272                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11273                                   NL80211_FLAG_NEED_RTNL,
11274         },
11275         {
11276                 .cmd = NL80211_CMD_GET_SURVEY,
11277                 .policy = nl80211_policy,
11278                 .dumpit = nl80211_dump_survey,
11279         },
11280         {
11281                 .cmd = NL80211_CMD_SET_PMKSA,
11282                 .doit = nl80211_setdel_pmksa,
11283                 .policy = nl80211_policy,
11284                 .flags = GENL_ADMIN_PERM,
11285                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11286                                   NL80211_FLAG_NEED_RTNL,
11287         },
11288         {
11289                 .cmd = NL80211_CMD_DEL_PMKSA,
11290                 .doit = nl80211_setdel_pmksa,
11291                 .policy = nl80211_policy,
11292                 .flags = GENL_ADMIN_PERM,
11293                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11294                                   NL80211_FLAG_NEED_RTNL,
11295         },
11296         {
11297                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11298                 .doit = nl80211_flush_pmksa,
11299                 .policy = nl80211_policy,
11300                 .flags = GENL_ADMIN_PERM,
11301                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11302                                   NL80211_FLAG_NEED_RTNL,
11303         },
11304         {
11305                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11306                 .doit = nl80211_remain_on_channel,
11307                 .policy = nl80211_policy,
11308                 .flags = GENL_ADMIN_PERM,
11309                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11310                                   NL80211_FLAG_NEED_RTNL,
11311         },
11312         {
11313                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11314                 .doit = nl80211_cancel_remain_on_channel,
11315                 .policy = nl80211_policy,
11316                 .flags = GENL_ADMIN_PERM,
11317                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11318                                   NL80211_FLAG_NEED_RTNL,
11319         },
11320         {
11321                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11322                 .doit = nl80211_set_tx_bitrate_mask,
11323                 .policy = nl80211_policy,
11324                 .flags = GENL_ADMIN_PERM,
11325                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11326                                   NL80211_FLAG_NEED_RTNL,
11327         },
11328         {
11329                 .cmd = NL80211_CMD_REGISTER_FRAME,
11330                 .doit = nl80211_register_mgmt,
11331                 .policy = nl80211_policy,
11332                 .flags = GENL_ADMIN_PERM,
11333                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11334                                   NL80211_FLAG_NEED_RTNL,
11335         },
11336         {
11337                 .cmd = NL80211_CMD_FRAME,
11338                 .doit = nl80211_tx_mgmt,
11339                 .policy = nl80211_policy,
11340                 .flags = GENL_ADMIN_PERM,
11341                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11342                                   NL80211_FLAG_NEED_RTNL,
11343         },
11344         {
11345                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11346                 .doit = nl80211_tx_mgmt_cancel_wait,
11347                 .policy = nl80211_policy,
11348                 .flags = GENL_ADMIN_PERM,
11349                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11350                                   NL80211_FLAG_NEED_RTNL,
11351         },
11352         {
11353                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11354                 .doit = nl80211_set_power_save,
11355                 .policy = nl80211_policy,
11356                 .flags = GENL_ADMIN_PERM,
11357                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11358                                   NL80211_FLAG_NEED_RTNL,
11359         },
11360         {
11361                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11362                 .doit = nl80211_get_power_save,
11363                 .policy = nl80211_policy,
11364                 /* can be retrieved by unprivileged users */
11365                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11366                                   NL80211_FLAG_NEED_RTNL,
11367         },
11368         {
11369                 .cmd = NL80211_CMD_SET_CQM,
11370                 .doit = nl80211_set_cqm,
11371                 .policy = nl80211_policy,
11372                 .flags = GENL_ADMIN_PERM,
11373                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11374                                   NL80211_FLAG_NEED_RTNL,
11375         },
11376         {
11377                 .cmd = NL80211_CMD_SET_CHANNEL,
11378                 .doit = nl80211_set_channel,
11379                 .policy = nl80211_policy,
11380                 .flags = GENL_ADMIN_PERM,
11381                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11382                                   NL80211_FLAG_NEED_RTNL,
11383         },
11384         {
11385                 .cmd = NL80211_CMD_SET_WDS_PEER,
11386                 .doit = nl80211_set_wds_peer,
11387                 .policy = nl80211_policy,
11388                 .flags = GENL_ADMIN_PERM,
11389                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11390                                   NL80211_FLAG_NEED_RTNL,
11391         },
11392         {
11393                 .cmd = NL80211_CMD_JOIN_MESH,
11394                 .doit = nl80211_join_mesh,
11395                 .policy = nl80211_policy,
11396                 .flags = GENL_ADMIN_PERM,
11397                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11398                                   NL80211_FLAG_NEED_RTNL,
11399         },
11400         {
11401                 .cmd = NL80211_CMD_LEAVE_MESH,
11402                 .doit = nl80211_leave_mesh,
11403                 .policy = nl80211_policy,
11404                 .flags = GENL_ADMIN_PERM,
11405                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11406                                   NL80211_FLAG_NEED_RTNL,
11407         },
11408         {
11409                 .cmd = NL80211_CMD_JOIN_OCB,
11410                 .doit = nl80211_join_ocb,
11411                 .policy = nl80211_policy,
11412                 .flags = GENL_ADMIN_PERM,
11413                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11414                                   NL80211_FLAG_NEED_RTNL,
11415         },
11416         {
11417                 .cmd = NL80211_CMD_LEAVE_OCB,
11418                 .doit = nl80211_leave_ocb,
11419                 .policy = nl80211_policy,
11420                 .flags = GENL_ADMIN_PERM,
11421                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11422                                   NL80211_FLAG_NEED_RTNL,
11423         },
11424 #ifdef CONFIG_PM
11425         {
11426                 .cmd = NL80211_CMD_GET_WOWLAN,
11427                 .doit = nl80211_get_wowlan,
11428                 .policy = nl80211_policy,
11429                 /* can be retrieved by unprivileged users */
11430                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11431                                   NL80211_FLAG_NEED_RTNL,
11432         },
11433         {
11434                 .cmd = NL80211_CMD_SET_WOWLAN,
11435                 .doit = nl80211_set_wowlan,
11436                 .policy = nl80211_policy,
11437                 .flags = GENL_ADMIN_PERM,
11438                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11439                                   NL80211_FLAG_NEED_RTNL,
11440         },
11441 #endif
11442         {
11443                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11444                 .doit = nl80211_set_rekey_data,
11445                 .policy = nl80211_policy,
11446                 .flags = GENL_ADMIN_PERM,
11447                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11448                                   NL80211_FLAG_NEED_RTNL |
11449                                   NL80211_FLAG_CLEAR_SKB,
11450         },
11451         {
11452                 .cmd = NL80211_CMD_TDLS_MGMT,
11453                 .doit = nl80211_tdls_mgmt,
11454                 .policy = nl80211_policy,
11455                 .flags = GENL_ADMIN_PERM,
11456                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11457                                   NL80211_FLAG_NEED_RTNL,
11458         },
11459         {
11460                 .cmd = NL80211_CMD_TDLS_OPER,
11461                 .doit = nl80211_tdls_oper,
11462                 .policy = nl80211_policy,
11463                 .flags = GENL_ADMIN_PERM,
11464                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11465                                   NL80211_FLAG_NEED_RTNL,
11466         },
11467         {
11468                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11469                 .doit = nl80211_register_unexpected_frame,
11470                 .policy = nl80211_policy,
11471                 .flags = GENL_ADMIN_PERM,
11472                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11473                                   NL80211_FLAG_NEED_RTNL,
11474         },
11475         {
11476                 .cmd = NL80211_CMD_PROBE_CLIENT,
11477                 .doit = nl80211_probe_client,
11478                 .policy = nl80211_policy,
11479                 .flags = GENL_ADMIN_PERM,
11480                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11481                                   NL80211_FLAG_NEED_RTNL,
11482         },
11483         {
11484                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11485                 .doit = nl80211_register_beacons,
11486                 .policy = nl80211_policy,
11487                 .flags = GENL_ADMIN_PERM,
11488                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11489                                   NL80211_FLAG_NEED_RTNL,
11490         },
11491         {
11492                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11493                 .doit = nl80211_set_noack_map,
11494                 .policy = nl80211_policy,
11495                 .flags = GENL_ADMIN_PERM,
11496                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11497                                   NL80211_FLAG_NEED_RTNL,
11498         },
11499         {
11500                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11501                 .doit = nl80211_start_p2p_device,
11502                 .policy = nl80211_policy,
11503                 .flags = GENL_ADMIN_PERM,
11504                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11505                                   NL80211_FLAG_NEED_RTNL,
11506         },
11507         {
11508                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11509                 .doit = nl80211_stop_p2p_device,
11510                 .policy = nl80211_policy,
11511                 .flags = GENL_ADMIN_PERM,
11512                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11513                                   NL80211_FLAG_NEED_RTNL,
11514         },
11515         {
11516                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11517                 .doit = nl80211_set_mcast_rate,
11518                 .policy = nl80211_policy,
11519                 .flags = GENL_ADMIN_PERM,
11520                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11521                                   NL80211_FLAG_NEED_RTNL,
11522         },
11523         {
11524                 .cmd = NL80211_CMD_SET_MAC_ACL,
11525                 .doit = nl80211_set_mac_acl,
11526                 .policy = nl80211_policy,
11527                 .flags = GENL_ADMIN_PERM,
11528                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11529                                   NL80211_FLAG_NEED_RTNL,
11530         },
11531         {
11532                 .cmd = NL80211_CMD_RADAR_DETECT,
11533                 .doit = nl80211_start_radar_detection,
11534                 .policy = nl80211_policy,
11535                 .flags = GENL_ADMIN_PERM,
11536                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11537                                   NL80211_FLAG_NEED_RTNL,
11538         },
11539         {
11540                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11541                 .doit = nl80211_get_protocol_features,
11542                 .policy = nl80211_policy,
11543         },
11544         {
11545                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11546                 .doit = nl80211_update_ft_ies,
11547                 .policy = nl80211_policy,
11548                 .flags = GENL_ADMIN_PERM,
11549                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11550                                   NL80211_FLAG_NEED_RTNL,
11551         },
11552         {
11553                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11554                 .doit = nl80211_crit_protocol_start,
11555                 .policy = nl80211_policy,
11556                 .flags = GENL_ADMIN_PERM,
11557                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11558                                   NL80211_FLAG_NEED_RTNL,
11559         },
11560         {
11561                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11562                 .doit = nl80211_crit_protocol_stop,
11563                 .policy = nl80211_policy,
11564                 .flags = GENL_ADMIN_PERM,
11565                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11566                                   NL80211_FLAG_NEED_RTNL,
11567         },
11568         {
11569                 .cmd = NL80211_CMD_GET_COALESCE,
11570                 .doit = nl80211_get_coalesce,
11571                 .policy = nl80211_policy,
11572                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11573                                   NL80211_FLAG_NEED_RTNL,
11574         },
11575         {
11576                 .cmd = NL80211_CMD_SET_COALESCE,
11577                 .doit = nl80211_set_coalesce,
11578                 .policy = nl80211_policy,
11579                 .flags = GENL_ADMIN_PERM,
11580                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11581                                   NL80211_FLAG_NEED_RTNL,
11582         },
11583         {
11584                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11585                 .doit = nl80211_channel_switch,
11586                 .policy = nl80211_policy,
11587                 .flags = GENL_ADMIN_PERM,
11588                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11589                                   NL80211_FLAG_NEED_RTNL,
11590         },
11591         {
11592                 .cmd = NL80211_CMD_VENDOR,
11593                 .doit = nl80211_vendor_cmd,
11594                 .dumpit = nl80211_vendor_cmd_dump,
11595                 .policy = nl80211_policy,
11596                 .flags = GENL_ADMIN_PERM,
11597                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11598                                   NL80211_FLAG_NEED_RTNL,
11599         },
11600         {
11601                 .cmd = NL80211_CMD_SET_QOS_MAP,
11602                 .doit = nl80211_set_qos_map,
11603                 .policy = nl80211_policy,
11604                 .flags = GENL_ADMIN_PERM,
11605                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11606                                   NL80211_FLAG_NEED_RTNL,
11607         },
11608         {
11609                 .cmd = NL80211_CMD_ADD_TX_TS,
11610                 .doit = nl80211_add_tx_ts,
11611                 .policy = nl80211_policy,
11612                 .flags = GENL_ADMIN_PERM,
11613                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11614                                   NL80211_FLAG_NEED_RTNL,
11615         },
11616         {
11617                 .cmd = NL80211_CMD_DEL_TX_TS,
11618                 .doit = nl80211_del_tx_ts,
11619                 .policy = nl80211_policy,
11620                 .flags = GENL_ADMIN_PERM,
11621                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11622                                   NL80211_FLAG_NEED_RTNL,
11623         },
11624         {
11625                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11626                 .doit = nl80211_tdls_channel_switch,
11627                 .policy = nl80211_policy,
11628                 .flags = GENL_ADMIN_PERM,
11629                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11630                                   NL80211_FLAG_NEED_RTNL,
11631         },
11632         {
11633                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11634                 .doit = nl80211_tdls_cancel_channel_switch,
11635                 .policy = nl80211_policy,
11636                 .flags = GENL_ADMIN_PERM,
11637                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11638                                   NL80211_FLAG_NEED_RTNL,
11639         },
11640 };
11641
11642 /* notification functions */
11643
11644 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11645                           enum nl80211_commands cmd)
11646 {
11647         struct sk_buff *msg;
11648         struct nl80211_dump_wiphy_state state = {};
11649
11650         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11651                 cmd != NL80211_CMD_DEL_WIPHY);
11652
11653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11654         if (!msg)
11655                 return;
11656
11657         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11658                 nlmsg_free(msg);
11659                 return;
11660         }
11661
11662         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11663                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11664 }
11665
11666 static int nl80211_add_scan_req(struct sk_buff *msg,
11667                                 struct cfg80211_registered_device *rdev)
11668 {
11669         struct cfg80211_scan_request *req = rdev->scan_req;
11670         struct nlattr *nest;
11671         int i;
11672
11673         if (WARN_ON(!req))
11674                 return 0;
11675
11676         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11677         if (!nest)
11678                 goto nla_put_failure;
11679         for (i = 0; i < req->n_ssids; i++) {
11680                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11681                         goto nla_put_failure;
11682         }
11683         nla_nest_end(msg, nest);
11684
11685         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11686         if (!nest)
11687                 goto nla_put_failure;
11688         for (i = 0; i < req->n_channels; i++) {
11689                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11690                         goto nla_put_failure;
11691         }
11692         nla_nest_end(msg, nest);
11693
11694         if (req->ie &&
11695             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11696                 goto nla_put_failure;
11697
11698         if (req->flags &&
11699             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11700                 goto nla_put_failure;
11701
11702         return 0;
11703  nla_put_failure:
11704         return -ENOBUFS;
11705 }
11706
11707 static int nl80211_send_scan_msg(struct sk_buff *msg,
11708                                  struct cfg80211_registered_device *rdev,
11709                                  struct wireless_dev *wdev,
11710                                  u32 portid, u32 seq, int flags,
11711                                  u32 cmd)
11712 {
11713         void *hdr;
11714
11715         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11716         if (!hdr)
11717                 return -1;
11718
11719         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11720             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11721                                          wdev->netdev->ifindex)) ||
11722             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11723                               NL80211_ATTR_PAD))
11724                 goto nla_put_failure;
11725
11726         /* ignore errors and send incomplete event anyway */
11727         nl80211_add_scan_req(msg, rdev);
11728
11729         genlmsg_end(msg, hdr);
11730         return 0;
11731
11732  nla_put_failure:
11733         genlmsg_cancel(msg, hdr);
11734         return -EMSGSIZE;
11735 }
11736
11737 static int
11738 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11739                             struct cfg80211_registered_device *rdev,
11740                             struct net_device *netdev,
11741                             u32 portid, u32 seq, int flags, u32 cmd)
11742 {
11743         void *hdr;
11744
11745         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11746         if (!hdr)
11747                 return -1;
11748
11749         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11750             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11751                 goto nla_put_failure;
11752
11753         genlmsg_end(msg, hdr);
11754         return 0;
11755
11756  nla_put_failure:
11757         genlmsg_cancel(msg, hdr);
11758         return -EMSGSIZE;
11759 }
11760
11761 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11762                              struct wireless_dev *wdev)
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_scan_msg(msg, rdev, wdev, 0, 0, 0,
11771                                   NL80211_CMD_TRIGGER_SCAN) < 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 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11781                                        struct wireless_dev *wdev, bool aborted)
11782 {
11783         struct sk_buff *msg;
11784
11785         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11786         if (!msg)
11787                 return NULL;
11788
11789         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11790                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11791                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11792                 nlmsg_free(msg);
11793                 return NULL;
11794         }
11795
11796         return msg;
11797 }
11798
11799 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11800                               struct sk_buff *msg)
11801 {
11802         if (!msg)
11803                 return;
11804
11805         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11806                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11807 }
11808
11809 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11810                                      struct net_device *netdev)
11811 {
11812         struct sk_buff *msg;
11813
11814         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11815         if (!msg)
11816                 return;
11817
11818         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11819                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11820                 nlmsg_free(msg);
11821                 return;
11822         }
11823
11824         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11825                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11826 }
11827
11828 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11829                              struct net_device *netdev, u32 cmd)
11830 {
11831         struct sk_buff *msg;
11832
11833         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11834         if (!msg)
11835                 return;
11836
11837         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11838                 nlmsg_free(msg);
11839                 return;
11840         }
11841
11842         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11843                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11844 }
11845
11846 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11847                                           struct regulatory_request *request)
11848 {
11849         /* Userspace can always count this one always being set */
11850         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11851                 goto nla_put_failure;
11852
11853         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11854                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11855                                NL80211_REGDOM_TYPE_WORLD))
11856                         goto nla_put_failure;
11857         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11858                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11859                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11860                         goto nla_put_failure;
11861         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11862                    request->intersect) {
11863                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11864                                NL80211_REGDOM_TYPE_INTERSECTION))
11865                         goto nla_put_failure;
11866         } else {
11867                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11868                                NL80211_REGDOM_TYPE_COUNTRY) ||
11869                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11870                                    request->alpha2))
11871                         goto nla_put_failure;
11872         }
11873
11874         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11875                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11876
11877                 if (wiphy &&
11878                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11879                         goto nla_put_failure;
11880
11881                 if (wiphy &&
11882                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11883                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11884                         goto nla_put_failure;
11885         }
11886
11887         return true;
11888
11889 nla_put_failure:
11890         return false;
11891 }
11892
11893 /*
11894  * This can happen on global regulatory changes or device specific settings
11895  * based on custom regulatory domains.
11896  */
11897 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11898                                      struct regulatory_request *request)
11899 {
11900         struct sk_buff *msg;
11901         void *hdr;
11902
11903         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11904         if (!msg)
11905                 return;
11906
11907         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11908         if (!hdr) {
11909                 nlmsg_free(msg);
11910                 return;
11911         }
11912
11913         if (nl80211_reg_change_event_fill(msg, request) == false)
11914                 goto nla_put_failure;
11915
11916         genlmsg_end(msg, hdr);
11917
11918         rcu_read_lock();
11919         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11920                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11921         rcu_read_unlock();
11922
11923         return;
11924
11925 nla_put_failure:
11926         genlmsg_cancel(msg, hdr);
11927         nlmsg_free(msg);
11928 }
11929
11930 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11931                                     struct net_device *netdev,
11932                                     const u8 *buf, size_t len,
11933                                     enum nl80211_commands cmd, gfp_t gfp,
11934                                     int uapsd_queues)
11935 {
11936         struct sk_buff *msg;
11937         void *hdr;
11938
11939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11940         if (!msg)
11941                 return;
11942
11943         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11944         if (!hdr) {
11945                 nlmsg_free(msg);
11946                 return;
11947         }
11948
11949         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11950             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11951             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11952                 goto nla_put_failure;
11953
11954         if (uapsd_queues >= 0) {
11955                 struct nlattr *nla_wmm =
11956                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11957                 if (!nla_wmm)
11958                         goto nla_put_failure;
11959
11960                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11961                                uapsd_queues))
11962                         goto nla_put_failure;
11963
11964                 nla_nest_end(msg, nla_wmm);
11965         }
11966
11967         genlmsg_end(msg, hdr);
11968
11969         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11970                                 NL80211_MCGRP_MLME, gfp);
11971         return;
11972
11973  nla_put_failure:
11974         genlmsg_cancel(msg, hdr);
11975         nlmsg_free(msg);
11976 }
11977
11978 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11979                           struct net_device *netdev, const u8 *buf,
11980                           size_t len, gfp_t gfp)
11981 {
11982         nl80211_send_mlme_event(rdev, netdev, buf, len,
11983                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11984 }
11985
11986 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11987                            struct net_device *netdev, const u8 *buf,
11988                            size_t len, gfp_t gfp, int uapsd_queues)
11989 {
11990         nl80211_send_mlme_event(rdev, netdev, buf, len,
11991                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11992 }
11993
11994 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11995                          struct net_device *netdev, const u8 *buf,
11996                          size_t len, gfp_t gfp)
11997 {
11998         nl80211_send_mlme_event(rdev, netdev, buf, len,
11999                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12000 }
12001
12002 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12003                            struct net_device *netdev, const u8 *buf,
12004                            size_t len, gfp_t gfp)
12005 {
12006         nl80211_send_mlme_event(rdev, netdev, buf, len,
12007                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12008 }
12009
12010 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12011                                   size_t len)
12012 {
12013         struct wireless_dev *wdev = dev->ieee80211_ptr;
12014         struct wiphy *wiphy = wdev->wiphy;
12015         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12016         const struct ieee80211_mgmt *mgmt = (void *)buf;
12017         u32 cmd;
12018
12019         if (WARN_ON(len < 2))
12020                 return;
12021
12022         if (ieee80211_is_deauth(mgmt->frame_control))
12023                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12024         else
12025                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12026
12027         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12028         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12029 }
12030 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12031
12032 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12033                                       struct net_device *netdev, int cmd,
12034                                       const u8 *addr, gfp_t gfp)
12035 {
12036         struct sk_buff *msg;
12037         void *hdr;
12038
12039         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12040         if (!msg)
12041                 return;
12042
12043         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12044         if (!hdr) {
12045                 nlmsg_free(msg);
12046                 return;
12047         }
12048
12049         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12050             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12051             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12052             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12053                 goto nla_put_failure;
12054
12055         genlmsg_end(msg, hdr);
12056
12057         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12058                                 NL80211_MCGRP_MLME, gfp);
12059         return;
12060
12061  nla_put_failure:
12062         genlmsg_cancel(msg, hdr);
12063         nlmsg_free(msg);
12064 }
12065
12066 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12067                                struct net_device *netdev, const u8 *addr,
12068                                gfp_t gfp)
12069 {
12070         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12071                                   addr, gfp);
12072 }
12073
12074 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12075                                 struct net_device *netdev, const u8 *addr,
12076                                 gfp_t gfp)
12077 {
12078         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12079                                   addr, gfp);
12080 }
12081
12082 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12083                                  struct net_device *netdev, const u8 *bssid,
12084                                  const u8 *req_ie, size_t req_ie_len,
12085                                  const u8 *resp_ie, size_t resp_ie_len,
12086                                  u16 status, gfp_t gfp)
12087 {
12088         struct sk_buff *msg;
12089         void *hdr;
12090
12091         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12092         if (!msg)
12093                 return;
12094
12095         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12096         if (!hdr) {
12097                 nlmsg_free(msg);
12098                 return;
12099         }
12100
12101         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12102             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12103             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12104             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
12105             (req_ie &&
12106              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12107             (resp_ie &&
12108              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12109                 goto nla_put_failure;
12110
12111         genlmsg_end(msg, hdr);
12112
12113         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12114                                 NL80211_MCGRP_MLME, gfp);
12115         return;
12116
12117  nla_put_failure:
12118         genlmsg_cancel(msg, hdr);
12119         nlmsg_free(msg);
12120
12121 }
12122
12123 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12124                          struct net_device *netdev, const u8 *bssid,
12125                          const u8 *req_ie, size_t req_ie_len,
12126                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12127 {
12128         struct sk_buff *msg;
12129         void *hdr;
12130
12131         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12132         if (!msg)
12133                 return;
12134
12135         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12136         if (!hdr) {
12137                 nlmsg_free(msg);
12138                 return;
12139         }
12140
12141         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12142             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12143             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12144             (req_ie &&
12145              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12146             (resp_ie &&
12147              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12148                 goto nla_put_failure;
12149
12150         genlmsg_end(msg, hdr);
12151
12152         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12153                                 NL80211_MCGRP_MLME, gfp);
12154         return;
12155
12156  nla_put_failure:
12157         genlmsg_cancel(msg, hdr);
12158         nlmsg_free(msg);
12159
12160 }
12161
12162 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12163                                struct net_device *netdev, u16 reason,
12164                                const u8 *ie, size_t ie_len, bool from_ap)
12165 {
12166         struct sk_buff *msg;
12167         void *hdr;
12168
12169         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12170         if (!msg)
12171                 return;
12172
12173         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12174         if (!hdr) {
12175                 nlmsg_free(msg);
12176                 return;
12177         }
12178
12179         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12180             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12181             (from_ap && reason &&
12182              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12183             (from_ap &&
12184              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12185             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12186                 goto nla_put_failure;
12187
12188         genlmsg_end(msg, hdr);
12189
12190         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12191                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12192         return;
12193
12194  nla_put_failure:
12195         genlmsg_cancel(msg, hdr);
12196         nlmsg_free(msg);
12197
12198 }
12199
12200 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12201                              struct net_device *netdev, const u8 *bssid,
12202                              gfp_t gfp)
12203 {
12204         struct sk_buff *msg;
12205         void *hdr;
12206
12207         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12208         if (!msg)
12209                 return;
12210
12211         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12212         if (!hdr) {
12213                 nlmsg_free(msg);
12214                 return;
12215         }
12216
12217         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12218             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12219             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12220                 goto nla_put_failure;
12221
12222         genlmsg_end(msg, hdr);
12223
12224         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12225                                 NL80211_MCGRP_MLME, gfp);
12226         return;
12227
12228  nla_put_failure:
12229         genlmsg_cancel(msg, hdr);
12230         nlmsg_free(msg);
12231 }
12232
12233 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12234                                         const u8* ie, u8 ie_len, gfp_t gfp)
12235 {
12236         struct wireless_dev *wdev = dev->ieee80211_ptr;
12237         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12238         struct sk_buff *msg;
12239         void *hdr;
12240
12241         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12242                 return;
12243
12244         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12245
12246         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12247         if (!msg)
12248                 return;
12249
12250         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12251         if (!hdr) {
12252                 nlmsg_free(msg);
12253                 return;
12254         }
12255
12256         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12257             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12258             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12259             (ie_len && ie &&
12260              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12261                 goto nla_put_failure;
12262
12263         genlmsg_end(msg, hdr);
12264
12265         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12266                                 NL80211_MCGRP_MLME, gfp);
12267         return;
12268
12269  nla_put_failure:
12270         genlmsg_cancel(msg, hdr);
12271         nlmsg_free(msg);
12272 }
12273 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12274
12275 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12276                                  struct net_device *netdev, const u8 *addr,
12277                                  enum nl80211_key_type key_type, int key_id,
12278                                  const u8 *tsc, gfp_t gfp)
12279 {
12280         struct sk_buff *msg;
12281         void *hdr;
12282
12283         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12284         if (!msg)
12285                 return;
12286
12287         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12288         if (!hdr) {
12289                 nlmsg_free(msg);
12290                 return;
12291         }
12292
12293         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12294             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12295             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12296             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12297             (key_id != -1 &&
12298              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12299             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12300                 goto nla_put_failure;
12301
12302         genlmsg_end(msg, hdr);
12303
12304         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12305                                 NL80211_MCGRP_MLME, gfp);
12306         return;
12307
12308  nla_put_failure:
12309         genlmsg_cancel(msg, hdr);
12310         nlmsg_free(msg);
12311 }
12312
12313 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12314                                     struct ieee80211_channel *channel_before,
12315                                     struct ieee80211_channel *channel_after)
12316 {
12317         struct sk_buff *msg;
12318         void *hdr;
12319         struct nlattr *nl_freq;
12320
12321         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12322         if (!msg)
12323                 return;
12324
12325         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12326         if (!hdr) {
12327                 nlmsg_free(msg);
12328                 return;
12329         }
12330
12331         /*
12332          * Since we are applying the beacon hint to a wiphy we know its
12333          * wiphy_idx is valid
12334          */
12335         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12336                 goto nla_put_failure;
12337
12338         /* Before */
12339         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12340         if (!nl_freq)
12341                 goto nla_put_failure;
12342         if (nl80211_msg_put_channel(msg, channel_before, false))
12343                 goto nla_put_failure;
12344         nla_nest_end(msg, nl_freq);
12345
12346         /* After */
12347         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12348         if (!nl_freq)
12349                 goto nla_put_failure;
12350         if (nl80211_msg_put_channel(msg, channel_after, false))
12351                 goto nla_put_failure;
12352         nla_nest_end(msg, nl_freq);
12353
12354         genlmsg_end(msg, hdr);
12355
12356         rcu_read_lock();
12357         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12358                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12359         rcu_read_unlock();
12360
12361         return;
12362
12363 nla_put_failure:
12364         genlmsg_cancel(msg, hdr);
12365         nlmsg_free(msg);
12366 }
12367
12368 static void nl80211_send_remain_on_chan_event(
12369         int cmd, struct cfg80211_registered_device *rdev,
12370         struct wireless_dev *wdev, u64 cookie,
12371         struct ieee80211_channel *chan,
12372         unsigned int duration, gfp_t gfp)
12373 {
12374         struct sk_buff *msg;
12375         void *hdr;
12376
12377         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12378         if (!msg)
12379                 return;
12380
12381         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12382         if (!hdr) {
12383                 nlmsg_free(msg);
12384                 return;
12385         }
12386
12387         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12388             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12389                                          wdev->netdev->ifindex)) ||
12390             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12391                               NL80211_ATTR_PAD) ||
12392             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12393             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12394                         NL80211_CHAN_NO_HT) ||
12395             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12396                               NL80211_ATTR_PAD))
12397                 goto nla_put_failure;
12398
12399         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12400             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12401                 goto nla_put_failure;
12402
12403         genlmsg_end(msg, hdr);
12404
12405         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12406                                 NL80211_MCGRP_MLME, gfp);
12407         return;
12408
12409  nla_put_failure:
12410         genlmsg_cancel(msg, hdr);
12411         nlmsg_free(msg);
12412 }
12413
12414 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12415                                struct ieee80211_channel *chan,
12416                                unsigned int duration, gfp_t gfp)
12417 {
12418         struct wiphy *wiphy = wdev->wiphy;
12419         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12420
12421         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12422         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12423                                           rdev, wdev, cookie, chan,
12424                                           duration, gfp);
12425 }
12426 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12427
12428 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12429                                         struct ieee80211_channel *chan,
12430                                         gfp_t gfp)
12431 {
12432         struct wiphy *wiphy = wdev->wiphy;
12433         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12434
12435         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12436         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12437                                           rdev, wdev, cookie, chan, 0, gfp);
12438 }
12439 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12440
12441 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12442                       struct station_info *sinfo, gfp_t gfp)
12443 {
12444         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12445         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12446         struct sk_buff *msg;
12447
12448         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12449
12450         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12451         if (!msg)
12452                 return;
12453
12454         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12455                                  rdev, dev, mac_addr, sinfo) < 0) {
12456                 nlmsg_free(msg);
12457                 return;
12458         }
12459
12460         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12461                                 NL80211_MCGRP_MLME, gfp);
12462 }
12463 EXPORT_SYMBOL(cfg80211_new_sta);
12464
12465 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12466                             struct station_info *sinfo, gfp_t gfp)
12467 {
12468         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12469         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12470         struct sk_buff *msg;
12471         struct station_info empty_sinfo = {};
12472
12473         if (!sinfo)
12474                 sinfo = &empty_sinfo;
12475
12476         trace_cfg80211_del_sta(dev, mac_addr);
12477
12478         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12479         if (!msg)
12480                 return;
12481
12482         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12483                                  rdev, dev, mac_addr, sinfo) < 0) {
12484                 nlmsg_free(msg);
12485                 return;
12486         }
12487
12488         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12489                                 NL80211_MCGRP_MLME, gfp);
12490 }
12491 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12492
12493 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12494                           enum nl80211_connect_failed_reason reason,
12495                           gfp_t gfp)
12496 {
12497         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12498         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12499         struct sk_buff *msg;
12500         void *hdr;
12501
12502         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12503         if (!msg)
12504                 return;
12505
12506         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12507         if (!hdr) {
12508                 nlmsg_free(msg);
12509                 return;
12510         }
12511
12512         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12513             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12514             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12515                 goto nla_put_failure;
12516
12517         genlmsg_end(msg, hdr);
12518
12519         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12520                                 NL80211_MCGRP_MLME, gfp);
12521         return;
12522
12523  nla_put_failure:
12524         genlmsg_cancel(msg, hdr);
12525         nlmsg_free(msg);
12526 }
12527 EXPORT_SYMBOL(cfg80211_conn_failed);
12528
12529 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12530                                        const u8 *addr, gfp_t gfp)
12531 {
12532         struct wireless_dev *wdev = dev->ieee80211_ptr;
12533         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12534         struct sk_buff *msg;
12535         void *hdr;
12536         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12537
12538         if (!nlportid)
12539                 return false;
12540
12541         msg = nlmsg_new(100, gfp);
12542         if (!msg)
12543                 return true;
12544
12545         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12546         if (!hdr) {
12547                 nlmsg_free(msg);
12548                 return true;
12549         }
12550
12551         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12552             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12553             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12554                 goto nla_put_failure;
12555
12556         genlmsg_end(msg, hdr);
12557         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12558         return true;
12559
12560  nla_put_failure:
12561         genlmsg_cancel(msg, hdr);
12562         nlmsg_free(msg);
12563         return true;
12564 }
12565
12566 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12567                                 const u8 *addr, gfp_t gfp)
12568 {
12569         struct wireless_dev *wdev = dev->ieee80211_ptr;
12570         bool ret;
12571
12572         trace_cfg80211_rx_spurious_frame(dev, addr);
12573
12574         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12575                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12576                 trace_cfg80211_return_bool(false);
12577                 return false;
12578         }
12579         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12580                                          addr, gfp);
12581         trace_cfg80211_return_bool(ret);
12582         return ret;
12583 }
12584 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12585
12586 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12587                                         const u8 *addr, gfp_t gfp)
12588 {
12589         struct wireless_dev *wdev = dev->ieee80211_ptr;
12590         bool ret;
12591
12592         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12593
12594         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12595                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12596                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12597                 trace_cfg80211_return_bool(false);
12598                 return false;
12599         }
12600         ret = __nl80211_unexpected_frame(dev,
12601                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12602                                          addr, gfp);
12603         trace_cfg80211_return_bool(ret);
12604         return ret;
12605 }
12606 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12607
12608 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12609                       struct wireless_dev *wdev, u32 nlportid,
12610                       int freq, int sig_dbm,
12611                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12612 {
12613         struct net_device *netdev = wdev->netdev;
12614         struct sk_buff *msg;
12615         void *hdr;
12616
12617         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12618         if (!msg)
12619                 return -ENOMEM;
12620
12621         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12622         if (!hdr) {
12623                 nlmsg_free(msg);
12624                 return -ENOMEM;
12625         }
12626
12627         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12628             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12629                                         netdev->ifindex)) ||
12630             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12631                               NL80211_ATTR_PAD) ||
12632             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12633             (sig_dbm &&
12634              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12635             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12636             (flags &&
12637              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12638                 goto nla_put_failure;
12639
12640         genlmsg_end(msg, hdr);
12641
12642         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12643
12644  nla_put_failure:
12645         genlmsg_cancel(msg, hdr);
12646         nlmsg_free(msg);
12647         return -ENOBUFS;
12648 }
12649
12650 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12651                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12652 {
12653         struct wiphy *wiphy = wdev->wiphy;
12654         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12655         struct net_device *netdev = wdev->netdev;
12656         struct sk_buff *msg;
12657         void *hdr;
12658
12659         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12660
12661         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12662         if (!msg)
12663                 return;
12664
12665         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12666         if (!hdr) {
12667                 nlmsg_free(msg);
12668                 return;
12669         }
12670
12671         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12672             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12673                                    netdev->ifindex)) ||
12674             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12675                               NL80211_ATTR_PAD) ||
12676             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12677             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12678                               NL80211_ATTR_PAD) ||
12679             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12680                 goto nla_put_failure;
12681
12682         genlmsg_end(msg, hdr);
12683
12684         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12685                                 NL80211_MCGRP_MLME, gfp);
12686         return;
12687
12688  nla_put_failure:
12689         genlmsg_cancel(msg, hdr);
12690         nlmsg_free(msg);
12691 }
12692 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12693
12694 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12695                                             const char *mac, gfp_t gfp)
12696 {
12697         struct wireless_dev *wdev = dev->ieee80211_ptr;
12698         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12699         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12700         void **cb;
12701
12702         if (!msg)
12703                 return NULL;
12704
12705         cb = (void **)msg->cb;
12706
12707         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12708         if (!cb[0]) {
12709                 nlmsg_free(msg);
12710                 return NULL;
12711         }
12712
12713         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12714             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12715                 goto nla_put_failure;
12716
12717         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12718                 goto nla_put_failure;
12719
12720         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12721         if (!cb[1])
12722                 goto nla_put_failure;
12723
12724         cb[2] = rdev;
12725
12726         return msg;
12727  nla_put_failure:
12728         nlmsg_free(msg);
12729         return NULL;
12730 }
12731
12732 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12733 {
12734         void **cb = (void **)msg->cb;
12735         struct cfg80211_registered_device *rdev = cb[2];
12736
12737         nla_nest_end(msg, cb[1]);
12738         genlmsg_end(msg, cb[0]);
12739
12740         memset(msg->cb, 0, sizeof(msg->cb));
12741
12742         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12743                                 NL80211_MCGRP_MLME, gfp);
12744 }
12745
12746 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12747                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12748                               gfp_t gfp)
12749 {
12750         struct sk_buff *msg;
12751
12752         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12753
12754         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12755                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12756                 return;
12757
12758         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12759         if (!msg)
12760                 return;
12761
12762         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12763                         rssi_event))
12764                 goto nla_put_failure;
12765
12766         cfg80211_send_cqm(msg, gfp);
12767
12768         return;
12769
12770  nla_put_failure:
12771         nlmsg_free(msg);
12772 }
12773 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12774
12775 void cfg80211_cqm_txe_notify(struct net_device *dev,
12776                              const u8 *peer, u32 num_packets,
12777                              u32 rate, u32 intvl, gfp_t gfp)
12778 {
12779         struct sk_buff *msg;
12780
12781         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12782         if (!msg)
12783                 return;
12784
12785         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12786                 goto nla_put_failure;
12787
12788         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12789                 goto nla_put_failure;
12790
12791         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12792                 goto nla_put_failure;
12793
12794         cfg80211_send_cqm(msg, gfp);
12795         return;
12796
12797  nla_put_failure:
12798         nlmsg_free(msg);
12799 }
12800 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12801
12802 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12803                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12804 {
12805         struct sk_buff *msg;
12806
12807         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12808
12809         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12810         if (!msg)
12811                 return;
12812
12813         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12814                 goto nla_put_failure;
12815
12816         cfg80211_send_cqm(msg, gfp);
12817         return;
12818
12819  nla_put_failure:
12820         nlmsg_free(msg);
12821 }
12822 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12823
12824 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12825 {
12826         struct sk_buff *msg;
12827
12828         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12829         if (!msg)
12830                 return;
12831
12832         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12833                 goto nla_put_failure;
12834
12835         cfg80211_send_cqm(msg, gfp);
12836         return;
12837
12838  nla_put_failure:
12839         nlmsg_free(msg);
12840 }
12841 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12842
12843 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12844                                      struct net_device *netdev, const u8 *bssid,
12845                                      const u8 *replay_ctr, gfp_t gfp)
12846 {
12847         struct sk_buff *msg;
12848         struct nlattr *rekey_attr;
12849         void *hdr;
12850
12851         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12852         if (!msg)
12853                 return;
12854
12855         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12856         if (!hdr) {
12857                 nlmsg_free(msg);
12858                 return;
12859         }
12860
12861         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12862             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12863             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12864                 goto nla_put_failure;
12865
12866         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12867         if (!rekey_attr)
12868                 goto nla_put_failure;
12869
12870         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12871                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12872                 goto nla_put_failure;
12873
12874         nla_nest_end(msg, rekey_attr);
12875
12876         genlmsg_end(msg, hdr);
12877
12878         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12879                                 NL80211_MCGRP_MLME, gfp);
12880         return;
12881
12882  nla_put_failure:
12883         genlmsg_cancel(msg, hdr);
12884         nlmsg_free(msg);
12885 }
12886
12887 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12888                                const u8 *replay_ctr, gfp_t gfp)
12889 {
12890         struct wireless_dev *wdev = dev->ieee80211_ptr;
12891         struct wiphy *wiphy = wdev->wiphy;
12892         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12893
12894         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12895         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12896 }
12897 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12898
12899 static void
12900 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12901                                struct net_device *netdev, int index,
12902                                const u8 *bssid, bool preauth, gfp_t gfp)
12903 {
12904         struct sk_buff *msg;
12905         struct nlattr *attr;
12906         void *hdr;
12907
12908         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12909         if (!msg)
12910                 return;
12911
12912         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12913         if (!hdr) {
12914                 nlmsg_free(msg);
12915                 return;
12916         }
12917
12918         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12919             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12920                 goto nla_put_failure;
12921
12922         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12923         if (!attr)
12924                 goto nla_put_failure;
12925
12926         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12927             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12928             (preauth &&
12929              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12930                 goto nla_put_failure;
12931
12932         nla_nest_end(msg, attr);
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_pmksa_candidate_notify(struct net_device *dev, int index,
12946                                      const u8 *bssid, bool preauth, gfp_t gfp)
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         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12953         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12954 }
12955 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12956
12957 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12958                                      struct net_device *netdev,
12959                                      struct cfg80211_chan_def *chandef,
12960                                      gfp_t gfp,
12961                                      enum nl80211_commands notif,
12962                                      u8 count)
12963 {
12964         struct sk_buff *msg;
12965         void *hdr;
12966
12967         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12968         if (!msg)
12969                 return;
12970
12971         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12972         if (!hdr) {
12973                 nlmsg_free(msg);
12974                 return;
12975         }
12976
12977         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12978                 goto nla_put_failure;
12979
12980         if (nl80211_send_chandef(msg, chandef))
12981                 goto nla_put_failure;
12982
12983         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12984             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12985                         goto nla_put_failure;
12986
12987         genlmsg_end(msg, hdr);
12988
12989         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12990                                 NL80211_MCGRP_MLME, gfp);
12991         return;
12992
12993  nla_put_failure:
12994         genlmsg_cancel(msg, hdr);
12995         nlmsg_free(msg);
12996 }
12997
12998 void cfg80211_ch_switch_notify(struct net_device *dev,
12999                                struct cfg80211_chan_def *chandef)
13000 {
13001         struct wireless_dev *wdev = dev->ieee80211_ptr;
13002         struct wiphy *wiphy = wdev->wiphy;
13003         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13004
13005         ASSERT_WDEV_LOCK(wdev);
13006
13007         trace_cfg80211_ch_switch_notify(dev, chandef);
13008
13009         wdev->chandef = *chandef;
13010         wdev->preset_chandef = *chandef;
13011         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13012                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13013 }
13014 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13015
13016 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13017                                        struct cfg80211_chan_def *chandef,
13018                                        u8 count)
13019 {
13020         struct wireless_dev *wdev = dev->ieee80211_ptr;
13021         struct wiphy *wiphy = wdev->wiphy;
13022         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13023
13024         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13025
13026         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13027                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13028 }
13029 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13030
13031 void
13032 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13033                      const struct cfg80211_chan_def *chandef,
13034                      enum nl80211_radar_event event,
13035                      struct net_device *netdev, gfp_t gfp)
13036 {
13037         struct sk_buff *msg;
13038         void *hdr;
13039
13040         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13041         if (!msg)
13042                 return;
13043
13044         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13045         if (!hdr) {
13046                 nlmsg_free(msg);
13047                 return;
13048         }
13049
13050         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13051                 goto nla_put_failure;
13052
13053         /* NOP and radar events don't need a netdev parameter */
13054         if (netdev) {
13055                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13056
13057                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13058                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13059                                       NL80211_ATTR_PAD))
13060                         goto nla_put_failure;
13061         }
13062
13063         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13064                 goto nla_put_failure;
13065
13066         if (nl80211_send_chandef(msg, chandef))
13067                 goto nla_put_failure;
13068
13069         genlmsg_end(msg, hdr);
13070
13071         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13072                                 NL80211_MCGRP_MLME, gfp);
13073         return;
13074
13075  nla_put_failure:
13076         genlmsg_cancel(msg, hdr);
13077         nlmsg_free(msg);
13078 }
13079
13080 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13081                            u64 cookie, bool acked, gfp_t gfp)
13082 {
13083         struct wireless_dev *wdev = dev->ieee80211_ptr;
13084         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13085         struct sk_buff *msg;
13086         void *hdr;
13087
13088         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13089
13090         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13091
13092         if (!msg)
13093                 return;
13094
13095         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13096         if (!hdr) {
13097                 nlmsg_free(msg);
13098                 return;
13099         }
13100
13101         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13102             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13103             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13104             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13105                               NL80211_ATTR_PAD) ||
13106             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13107                 goto nla_put_failure;
13108
13109         genlmsg_end(msg, hdr);
13110
13111         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13112                                 NL80211_MCGRP_MLME, gfp);
13113         return;
13114
13115  nla_put_failure:
13116         genlmsg_cancel(msg, hdr);
13117         nlmsg_free(msg);
13118 }
13119 EXPORT_SYMBOL(cfg80211_probe_status);
13120
13121 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13122                                  const u8 *frame, size_t len,
13123                                  int freq, int sig_dbm)
13124 {
13125         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13126         struct sk_buff *msg;
13127         void *hdr;
13128         struct cfg80211_beacon_registration *reg;
13129
13130         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13131
13132         spin_lock_bh(&rdev->beacon_registrations_lock);
13133         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13134                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13135                 if (!msg) {
13136                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13137                         return;
13138                 }
13139
13140                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13141                 if (!hdr)
13142                         goto nla_put_failure;
13143
13144                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13145                     (freq &&
13146                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13147                     (sig_dbm &&
13148                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13149                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13150                         goto nla_put_failure;
13151
13152                 genlmsg_end(msg, hdr);
13153
13154                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13155         }
13156         spin_unlock_bh(&rdev->beacon_registrations_lock);
13157         return;
13158
13159  nla_put_failure:
13160         spin_unlock_bh(&rdev->beacon_registrations_lock);
13161         if (hdr)
13162                 genlmsg_cancel(msg, hdr);
13163         nlmsg_free(msg);
13164 }
13165 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13166
13167 #ifdef CONFIG_PM
13168 static int cfg80211_net_detect_results(struct sk_buff *msg,
13169                                        struct cfg80211_wowlan_wakeup *wakeup)
13170 {
13171         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13172         struct nlattr *nl_results, *nl_match, *nl_freqs;
13173         int i, j;
13174
13175         nl_results = nla_nest_start(
13176                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13177         if (!nl_results)
13178                 return -EMSGSIZE;
13179
13180         for (i = 0; i < nd->n_matches; i++) {
13181                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13182
13183                 nl_match = nla_nest_start(msg, i);
13184                 if (!nl_match)
13185                         break;
13186
13187                 /* The SSID attribute is optional in nl80211, but for
13188                  * simplicity reasons it's always present in the
13189                  * cfg80211 structure.  If a driver can't pass the
13190                  * SSID, that needs to be changed.  A zero length SSID
13191                  * is still a valid SSID (wildcard), so it cannot be
13192                  * used for this purpose.
13193                  */
13194                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13195                             match->ssid.ssid)) {
13196                         nla_nest_cancel(msg, nl_match);
13197                         goto out;
13198                 }
13199
13200                 if (match->n_channels) {
13201                         nl_freqs = nla_nest_start(
13202                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13203                         if (!nl_freqs) {
13204                                 nla_nest_cancel(msg, nl_match);
13205                                 goto out;
13206                         }
13207
13208                         for (j = 0; j < match->n_channels; j++) {
13209                                 if (nla_put_u32(msg, j, match->channels[j])) {
13210                                         nla_nest_cancel(msg, nl_freqs);
13211                                         nla_nest_cancel(msg, nl_match);
13212                                         goto out;
13213                                 }
13214                         }
13215
13216                         nla_nest_end(msg, nl_freqs);
13217                 }
13218
13219                 nla_nest_end(msg, nl_match);
13220         }
13221
13222 out:
13223         nla_nest_end(msg, nl_results);
13224         return 0;
13225 }
13226
13227 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13228                                    struct cfg80211_wowlan_wakeup *wakeup,
13229                                    gfp_t gfp)
13230 {
13231         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13232         struct sk_buff *msg;
13233         void *hdr;
13234         int size = 200;
13235
13236         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13237
13238         if (wakeup)
13239                 size += wakeup->packet_present_len;
13240
13241         msg = nlmsg_new(size, gfp);
13242         if (!msg)
13243                 return;
13244
13245         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13246         if (!hdr)
13247                 goto free_msg;
13248
13249         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13250             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13251                               NL80211_ATTR_PAD))
13252                 goto free_msg;
13253
13254         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13255                                         wdev->netdev->ifindex))
13256                 goto free_msg;
13257
13258         if (wakeup) {
13259                 struct nlattr *reasons;
13260
13261                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13262                 if (!reasons)
13263                         goto free_msg;
13264
13265                 if (wakeup->disconnect &&
13266                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13267                         goto free_msg;
13268                 if (wakeup->magic_pkt &&
13269                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13270                         goto free_msg;
13271                 if (wakeup->gtk_rekey_failure &&
13272                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13273                         goto free_msg;
13274                 if (wakeup->eap_identity_req &&
13275                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13276                         goto free_msg;
13277                 if (wakeup->four_way_handshake &&
13278                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13279                         goto free_msg;
13280                 if (wakeup->rfkill_release &&
13281                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13282                         goto free_msg;
13283
13284                 if (wakeup->pattern_idx >= 0 &&
13285                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13286                                 wakeup->pattern_idx))
13287                         goto free_msg;
13288
13289                 if (wakeup->tcp_match &&
13290                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13291                         goto free_msg;
13292
13293                 if (wakeup->tcp_connlost &&
13294                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13295                         goto free_msg;
13296
13297                 if (wakeup->tcp_nomoretokens &&
13298                     nla_put_flag(msg,
13299                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13300                         goto free_msg;
13301
13302                 if (wakeup->packet) {
13303                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13304                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13305
13306                         if (!wakeup->packet_80211) {
13307                                 pkt_attr =
13308                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13309                                 len_attr =
13310                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13311                         }
13312
13313                         if (wakeup->packet_len &&
13314                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13315                                 goto free_msg;
13316
13317                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13318                                     wakeup->packet))
13319                                 goto free_msg;
13320                 }
13321
13322                 if (wakeup->net_detect &&
13323                     cfg80211_net_detect_results(msg, wakeup))
13324                                 goto free_msg;
13325
13326                 nla_nest_end(msg, reasons);
13327         }
13328
13329         genlmsg_end(msg, hdr);
13330
13331         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13332                                 NL80211_MCGRP_MLME, gfp);
13333         return;
13334
13335  free_msg:
13336         nlmsg_free(msg);
13337 }
13338 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13339 #endif
13340
13341 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13342                                 enum nl80211_tdls_operation oper,
13343                                 u16 reason_code, gfp_t gfp)
13344 {
13345         struct wireless_dev *wdev = dev->ieee80211_ptr;
13346         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13347         struct sk_buff *msg;
13348         void *hdr;
13349
13350         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13351                                          reason_code);
13352
13353         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13354         if (!msg)
13355                 return;
13356
13357         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13358         if (!hdr) {
13359                 nlmsg_free(msg);
13360                 return;
13361         }
13362
13363         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13364             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13365             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13366             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13367             (reason_code > 0 &&
13368              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13369                 goto nla_put_failure;
13370
13371         genlmsg_end(msg, hdr);
13372
13373         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13374                                 NL80211_MCGRP_MLME, gfp);
13375         return;
13376
13377  nla_put_failure:
13378         genlmsg_cancel(msg, hdr);
13379         nlmsg_free(msg);
13380 }
13381 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13382
13383 static int nl80211_netlink_notify(struct notifier_block * nb,
13384                                   unsigned long state,
13385                                   void *_notify)
13386 {
13387         struct netlink_notify *notify = _notify;
13388         struct cfg80211_registered_device *rdev;
13389         struct wireless_dev *wdev;
13390         struct cfg80211_beacon_registration *reg, *tmp;
13391
13392         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13393                 return NOTIFY_DONE;
13394
13395         rcu_read_lock();
13396
13397         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13398                 bool schedule_destroy_work = false;
13399                 bool schedule_scan_stop = false;
13400                 struct cfg80211_sched_scan_request *sched_scan_req =
13401                         rcu_dereference(rdev->sched_scan_req);
13402
13403                 if (sched_scan_req && notify->portid &&
13404                     sched_scan_req->owner_nlportid == notify->portid)
13405                         schedule_scan_stop = true;
13406
13407                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13408                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13409
13410                         if (wdev->owner_nlportid == notify->portid)
13411                                 schedule_destroy_work = true;
13412                 }
13413
13414                 spin_lock_bh(&rdev->beacon_registrations_lock);
13415                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13416                                          list) {
13417                         if (reg->nlportid == notify->portid) {
13418                                 list_del(&reg->list);
13419                                 kfree(reg);
13420                                 break;
13421                         }
13422                 }
13423                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13424
13425                 if (schedule_destroy_work) {
13426                         struct cfg80211_iface_destroy *destroy;
13427
13428                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13429                         if (destroy) {
13430                                 destroy->nlportid = notify->portid;
13431                                 spin_lock(&rdev->destroy_list_lock);
13432                                 list_add(&destroy->list, &rdev->destroy_list);
13433                                 spin_unlock(&rdev->destroy_list_lock);
13434                                 schedule_work(&rdev->destroy_work);
13435                         }
13436                 } else if (schedule_scan_stop) {
13437                         sched_scan_req->owner_nlportid = 0;
13438
13439                         if (rdev->ops->sched_scan_stop &&
13440                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13441                                 schedule_work(&rdev->sched_scan_stop_wk);
13442                 }
13443         }
13444
13445         rcu_read_unlock();
13446
13447         /*
13448          * It is possible that the user space process that is controlling the
13449          * indoor setting disappeared, so notify the regulatory core.
13450          */
13451         regulatory_netlink_notify(notify->portid);
13452         return NOTIFY_OK;
13453 }
13454
13455 static struct notifier_block nl80211_netlink_notifier = {
13456         .notifier_call = nl80211_netlink_notify,
13457 };
13458
13459 void cfg80211_ft_event(struct net_device *netdev,
13460                        struct cfg80211_ft_event_params *ft_event)
13461 {
13462         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13463         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13464         struct sk_buff *msg;
13465         void *hdr;
13466
13467         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13468
13469         if (!ft_event->target_ap)
13470                 return;
13471
13472         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13473         if (!msg)
13474                 return;
13475
13476         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13477         if (!hdr)
13478                 goto out;
13479
13480         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13481             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13482             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13483                 goto out;
13484
13485         if (ft_event->ies &&
13486             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13487                 goto out;
13488         if (ft_event->ric_ies &&
13489             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13490                     ft_event->ric_ies))
13491                 goto out;
13492
13493         genlmsg_end(msg, hdr);
13494
13495         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13496                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13497         return;
13498  out:
13499         nlmsg_free(msg);
13500 }
13501 EXPORT_SYMBOL(cfg80211_ft_event);
13502
13503 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13504 {
13505         struct cfg80211_registered_device *rdev;
13506         struct sk_buff *msg;
13507         void *hdr;
13508         u32 nlportid;
13509
13510         rdev = wiphy_to_rdev(wdev->wiphy);
13511         if (!rdev->crit_proto_nlportid)
13512                 return;
13513
13514         nlportid = rdev->crit_proto_nlportid;
13515         rdev->crit_proto_nlportid = 0;
13516
13517         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13518         if (!msg)
13519                 return;
13520
13521         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13522         if (!hdr)
13523                 goto nla_put_failure;
13524
13525         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13526             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13527                               NL80211_ATTR_PAD))
13528                 goto nla_put_failure;
13529
13530         genlmsg_end(msg, hdr);
13531
13532         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13533         return;
13534
13535  nla_put_failure:
13536         if (hdr)
13537                 genlmsg_cancel(msg, hdr);
13538         nlmsg_free(msg);
13539
13540 }
13541 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13542
13543 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13544 {
13545         struct wiphy *wiphy = wdev->wiphy;
13546         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13547         struct sk_buff *msg;
13548         void *hdr;
13549
13550         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13551         if (!msg)
13552                 return;
13553
13554         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13555         if (!hdr)
13556                 goto out;
13557
13558         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13559             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13560             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13561                               NL80211_ATTR_PAD))
13562                 goto out;
13563
13564         genlmsg_end(msg, hdr);
13565
13566         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13567                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13568         return;
13569  out:
13570         nlmsg_free(msg);
13571 }
13572
13573 /* initialisation/exit functions */
13574
13575 int nl80211_init(void)
13576 {
13577         int err;
13578
13579         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13580                                                    nl80211_mcgrps);
13581         if (err)
13582                 return err;
13583
13584         err = netlink_register_notifier(&nl80211_netlink_notifier);
13585         if (err)
13586                 goto err_out;
13587
13588         return 0;
13589  err_out:
13590         genl_unregister_family(&nl80211_fam);
13591         return err;
13592 }
13593
13594 void nl80211_exit(void)
13595 {
13596         netlink_unregister_notifier(&nl80211_netlink_notifier);
13597         genl_unregister_family(&nl80211_fam);
13598 }