SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/mac80211/cfg.c

   1 /*
   2  * mac80211 configuration hooks for cfg80211
   3  *
   4  * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
   5  *
   6  * This file is GPLv2 as found in COPYING.
   7  */
   8
   9 #include <linux/ieee80211.h>
  10 #include <linux/nl80211.h>
  11 #include <linux/rtnetlink.h>
  12 #include <net/net_namespace.h>
  13 #include <linux/rcupdate.h>
  14 #include <net/cfg80211.h>
  15 #include "ieee80211_i.h"
  16 #include "cfg.h"
  17 #include "rate.h"
  18 #include "mesh.h"
  19
  20 static bool nl80211_type_check(enum nl80211_iftype type)
  21 {
  22         switch (type) {
  23         case NL80211_IFTYPE_ADHOC:
  24         case NL80211_IFTYPE_STATION:
  25         case NL80211_IFTYPE_MONITOR:
  26 #ifdef CONFIG_MAC80211_MESH
  27         case NL80211_IFTYPE_MESH_POINT:
  28 #endif
  29         case NL80211_IFTYPE_WDS:
  30                 return true;
  31         default:
  32                 return false;
  33         }
  34 }
  35
  36 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
  37                                enum nl80211_iftype type, u32 *flags,
  38                                struct vif_params *params)
  39 {
  40         struct ieee80211_local *local = wiphy_priv(wiphy);
  41         struct net_device *dev;
  42         struct ieee80211_sub_if_data *sdata;
  43         int err;
  44
  45         if (!nl80211_type_check(type))
  46                 return -EINVAL;
  47
  48         err = ieee80211_if_add(local, name, &dev, type, params);
  49         if (err || type != NL80211_IFTYPE_MONITOR || !flags)
  50                 return err;
  51
  52         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  53         sdata->u.mntr_flags = *flags;
  54         return 0;
  55 }
  56
  57 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
  58 {
  59         struct net_device *dev;
  60         struct ieee80211_sub_if_data *sdata;
  61
  62         /* we're under RTNL */
  63         dev = __dev_get_by_index(&init_net, ifindex);
  64         if (!dev)
  65                 return -ENODEV;
  66
  67         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  68
  69         ieee80211_if_remove(sdata);
  70
  71         return 0;
  72 }
  73
  74 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
  75                                   enum nl80211_iftype type, u32 *flags,
  76                                   struct vif_params *params)
  77 {
  78         struct net_device *dev;
  79         struct ieee80211_sub_if_data *sdata;
  80         int ret;
  81
  82         /* we're under RTNL */
  83         dev = __dev_get_by_index(&init_net, ifindex);
  84         if (!dev)
  85                 return -ENODEV;
  86
  87         if (!nl80211_type_check(type))
  88                 return -EINVAL;
  89
  90         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  91
  92         ret = ieee80211_if_change_type(sdata, type);
  93         if (ret)
  94                 return ret;
  95
  96         if (netif_running(sdata->dev))
  97                 return -EBUSY;
  98
  99         if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
 100                 ieee80211_sdata_set_mesh_id(sdata,
 101                                             params->mesh_id_len,
 102                                             params->mesh_id);
 103
 104         if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !flags)
 105                 return 0;
 106
 107         sdata->u.mntr_flags = *flags;
 108         return 0;
 109 }
 110
 111 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 112                              u8 key_idx, u8 *mac_addr,
 113                              struct key_params *params)
 114 {
 115         struct ieee80211_sub_if_data *sdata;
 116         struct sta_info *sta = NULL;
 117         enum ieee80211_key_alg alg;
 118         struct ieee80211_key *key;
 119         int err;
 120
 121         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 122
 123         switch (params->cipher) {
 124         case WLAN_CIPHER_SUITE_WEP40:
 125         case WLAN_CIPHER_SUITE_WEP104:
 126                 alg = ALG_WEP;
 127                 break;
 128         case WLAN_CIPHER_SUITE_TKIP:
 129                 alg = ALG_TKIP;
 130                 break;
 131         case WLAN_CIPHER_SUITE_CCMP:
 132                 alg = ALG_CCMP;
 133                 break;
 134         default:
 135                 return -EINVAL;
 136         }
 137
 138         key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
 139         if (!key)
 140                 return -ENOMEM;
 141
 142         rcu_read_lock();
 143
 144         if (mac_addr) {
 145                 sta = sta_info_get(sdata->local, mac_addr);
 146                 if (!sta) {
 147                         ieee80211_key_free(key);
 148                         err = -ENOENT;
 149                         goto out_unlock;
 150                 }
 151         }
 152
 153         ieee80211_key_link(key, sdata, sta);
 154
 155         err = 0;
 156  out_unlock:
 157         rcu_read_unlock();
 158
 159         return err;
 160 }
 161
 162 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 163                              u8 key_idx, u8 *mac_addr)
 164 {
 165         struct ieee80211_sub_if_data *sdata;
 166         struct sta_info *sta;
 167         int ret;
 168
 169         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 170
 171         rcu_read_lock();
 172
 173         if (mac_addr) {
 174                 ret = -ENOENT;
 175
 176                 sta = sta_info_get(sdata->local, mac_addr);
 177                 if (!sta)
 178                         goto out_unlock;
 179
 180                 if (sta->key) {
 181                         ieee80211_key_free(sta->key);
 182                         WARN_ON(sta->key);
 183                         ret = 0;
 184                 }
 185
 186                 goto out_unlock;
 187         }
 188
 189         if (!sdata->keys[key_idx]) {
 190                 ret = -ENOENT;
 191                 goto out_unlock;
 192         }
 193
 194         ieee80211_key_free(sdata->keys[key_idx]);
 195         WARN_ON(sdata->keys[key_idx]);
 196
 197         ret = 0;
 198  out_unlock:
 199         rcu_read_unlock();
 200
 201         return ret;
 202 }
 203
 204 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 205                              u8 key_idx, u8 *mac_addr, void *cookie,
 206                              void (*callback)(void *cookie,
 207                                               struct key_params *params))
 208 {
 209         struct ieee80211_sub_if_data *sdata;
 210         struct sta_info *sta = NULL;
 211         u8 seq[6] = {0};
 212         struct key_params params;
 213         struct ieee80211_key *key;
 214         u32 iv32;
 215         u16 iv16;
 216         int err = -ENOENT;
 217
 218         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 219
 220         rcu_read_lock();
 221
 222         if (mac_addr) {
 223                 sta = sta_info_get(sdata->local, mac_addr);
 224                 if (!sta)
 225                         goto out;
 226
 227                 key = sta->key;
 228         } else
 229                 key = sdata->keys[key_idx];
 230
 231         if (!key)
 232                 goto out;
 233
 234         memset(&params, 0, sizeof(params));
 235
 236         switch (key->conf.alg) {
 237         case ALG_TKIP:
 238                 params.cipher = WLAN_CIPHER_SUITE_TKIP;
 239
 240                 iv32 = key->u.tkip.tx.iv32;
 241                 iv16 = key->u.tkip.tx.iv16;
 242
 243                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 244                     sdata->local->ops->get_tkip_seq)
 245                         sdata->local->ops->get_tkip_seq(
 246                                 local_to_hw(sdata->local),
 247                                 key->conf.hw_key_idx,
 248                                 &iv32, &iv16);
 249
 250                 seq[0] = iv16 & 0xff;
 251                 seq[1] = (iv16 >> 8) & 0xff;
 252                 seq[2] = iv32 & 0xff;
 253                 seq[3] = (iv32 >> 8) & 0xff;
 254                 seq[4] = (iv32 >> 16) & 0xff;
 255                 seq[5] = (iv32 >> 24) & 0xff;
 256                 params.seq = seq;
 257                 params.seq_len = 6;
 258                 break;
 259         case ALG_CCMP:
 260                 params.cipher = WLAN_CIPHER_SUITE_CCMP;
 261                 seq[0] = key->u.ccmp.tx_pn[5];
 262                 seq[1] = key->u.ccmp.tx_pn[4];
 263                 seq[2] = key->u.ccmp.tx_pn[3];
 264                 seq[3] = key->u.ccmp.tx_pn[2];
 265                 seq[4] = key->u.ccmp.tx_pn[1];
 266                 seq[5] = key->u.ccmp.tx_pn[0];
 267                 params.seq = seq;
 268                 params.seq_len = 6;
 269                 break;
 270         case ALG_WEP:
 271                 if (key->conf.keylen == 5)
 272                         params.cipher = WLAN_CIPHER_SUITE_WEP40;
 273                 else
 274                         params.cipher = WLAN_CIPHER_SUITE_WEP104;
 275                 break;
 276         }
 277
 278         params.key = key->conf.key;
 279         params.key_len = key->conf.keylen;
 280
 281         callback(cookie, &params);
 282         err = 0;
 283
 284  out:
 285         rcu_read_unlock();
 286         return err;
 287 }
 288
 289 static int ieee80211_config_default_key(struct wiphy *wiphy,
 290                                         struct net_device *dev,
 291                                         u8 key_idx)
 292 {
 293         struct ieee80211_sub_if_data *sdata;
 294
 295         rcu_read_lock();
 296
 297         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 298         ieee80211_set_default_key(sdata, key_idx);
 299
 300         rcu_read_unlock();
 301
 302         return 0;
 303 }
 304
 305 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 306 {
 307         struct ieee80211_sub_if_data *sdata = sta->sdata;
 308
 309         sinfo->filled = STATION_INFO_INACTIVE_TIME |
 310                         STATION_INFO_RX_BYTES |
 311                         STATION_INFO_TX_BYTES;
 312
 313         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 314         sinfo->rx_bytes = sta->rx_bytes;
 315         sinfo->tx_bytes = sta->tx_bytes;
 316
 317         if (ieee80211_vif_is_mesh(&sdata->vif)) {
 318 #ifdef CONFIG_MAC80211_MESH
 319                 sinfo->filled |= STATION_INFO_LLID |
 320                                  STATION_INFO_PLID |
 321                                  STATION_INFO_PLINK_STATE;
 322
 323                 sinfo->llid = le16_to_cpu(sta->llid);
 324                 sinfo->plid = le16_to_cpu(sta->plid);
 325                 sinfo->plink_state = sta->plink_state;
 326 #endif
 327         }
 328 }
 329
 330
 331 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 332                                  int idx, u8 *mac, struct station_info *sinfo)
 333 {
 334         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 335         struct sta_info *sta;
 336         int ret = -ENOENT;
 337
 338         rcu_read_lock();
 339
 340         sta = sta_info_get_by_idx(local, idx, dev);
 341         if (sta) {
 342                 ret = 0;
 343                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 344                 sta_set_sinfo(sta, sinfo);
 345         }
 346
 347         rcu_read_unlock();
 348
 349         return ret;
 350 }
 351
 352 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 353                                  u8 *mac, struct station_info *sinfo)
 354 {
 355         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 356         struct sta_info *sta;
 357         int ret = -ENOENT;
 358
 359         rcu_read_lock();
 360
 361         /* XXX: verify sta->dev == dev */
 362
 363         sta = sta_info_get(local, mac);
 364         if (sta) {
 365                 ret = 0;
 366                 sta_set_sinfo(sta, sinfo);
 367         }
 368
 369         rcu_read_unlock();
 370
 371         return ret;
 372 }
 373
 374 /*
 375  * This handles both adding a beacon and setting new beacon info
 376  */
 377 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 378                                    struct beacon_parameters *params)
 379 {
 380         struct beacon_data *new, *old;
 381         int new_head_len, new_tail_len;
 382         int size;
 383         int err = -EINVAL;
 384
 385         old = sdata->u.ap.beacon;
 386
 387         /* head must not be zero-length */
 388         if (params->head && !params->head_len)
 389                 return -EINVAL;
 390
 391         /*
 392          * This is a kludge. beacon interval should really be part
 393          * of the beacon information.
 394          */
 395         if (params->interval) {
 396                 sdata->local->hw.conf.beacon_int = params->interval;
 397                 if (ieee80211_hw_config(sdata->local))
 398                         return -EINVAL;
 399                 /*
 400                  * We updated some parameter so if below bails out
 401                  * it's not an error.
 402                  */
 403                 err = 0;
 404         }
 405
 406         /* Need to have a beacon head if we don't have one yet */
 407         if (!params->head && !old)
 408                 return err;
 409
 410         /* sorry, no way to start beaconing without dtim period */
 411         if (!params->dtim_period && !old)
 412                 return err;
 413
 414         /* new or old head? */
 415         if (params->head)
 416                 new_head_len = params->head_len;
 417         else
 418                 new_head_len = old->head_len;
 419
 420         /* new or old tail? */
 421         if (params->tail || !old)
 422                 /* params->tail_len will be zero for !params->tail */
 423                 new_tail_len = params->tail_len;
 424         else
 425                 new_tail_len = old->tail_len;
 426
 427         size = sizeof(*new) + new_head_len + new_tail_len;
 428
 429         new = kzalloc(size, GFP_KERNEL);
 430         if (!new)
 431                 return -ENOMEM;
 432
 433         /* start filling the new info now */
 434
 435         /* new or old dtim period? */
 436         if (params->dtim_period)
 437                 new->dtim_period = params->dtim_period;
 438         else
 439                 new->dtim_period = old->dtim_period;
 440
 441         /*
 442          * pointers go into the block we allocated,
 443          * memory is | beacon_data | head | tail |
 444          */
 445         new->head = ((u8 *) new) + sizeof(*new);
 446         new->tail = new->head + new_head_len;
 447         new->head_len = new_head_len;
 448         new->tail_len = new_tail_len;
 449
 450         /* copy in head */
 451         if (params->head)
 452                 memcpy(new->head, params->head, new_head_len);
 453         else
 454                 memcpy(new->head, old->head, new_head_len);
 455
 456         /* copy in optional tail */
 457         if (params->tail)
 458                 memcpy(new->tail, params->tail, new_tail_len);
 459         else
 460                 if (old)
 461                         memcpy(new->tail, old->tail, new_tail_len);
 462
 463         rcu_assign_pointer(sdata->u.ap.beacon, new);
 464
 465         synchronize_rcu();
 466
 467         kfree(old);
 468
 469         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 470 }
 471
 472 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 473                                 struct beacon_parameters *params)
 474 {
 475         struct ieee80211_sub_if_data *sdata;
 476         struct beacon_data *old;
 477
 478         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 479
 480         if (sdata->vif.type != NL80211_IFTYPE_AP)
 481                 return -EINVAL;
 482
 483         old = sdata->u.ap.beacon;
 484
 485         if (old)
 486                 return -EALREADY;
 487
 488         return ieee80211_config_beacon(sdata, params);
 489 }
 490
 491 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 492                                 struct beacon_parameters *params)
 493 {
 494         struct ieee80211_sub_if_data *sdata;
 495         struct beacon_data *old;
 496
 497         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 498
 499         if (sdata->vif.type != NL80211_IFTYPE_AP)
 500                 return -EINVAL;
 501
 502         old = sdata->u.ap.beacon;
 503
 504         if (!old)
 505                 return -ENOENT;
 506
 507         return ieee80211_config_beacon(sdata, params);
 508 }
 509
 510 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 511 {
 512         struct ieee80211_sub_if_data *sdata;
 513         struct beacon_data *old;
 514
 515         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 516
 517         if (sdata->vif.type != NL80211_IFTYPE_AP)
 518                 return -EINVAL;
 519
 520         old = sdata->u.ap.beacon;
 521
 522         if (!old)
 523                 return -ENOENT;
 524
 525         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 526         synchronize_rcu();
 527         kfree(old);
 528
 529         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 530 }
 531
 532 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 533 struct iapp_layer2_update {
 534         u8 da[ETH_ALEN];        /* broadcast */
 535         u8 sa[ETH_ALEN];        /* STA addr */
 536         __be16 len;             /* 6 */
 537         u8 dsap;                /* 0 */
 538         u8 ssap;                /* 0 */
 539         u8 control;
 540         u8 xid_info[3];
 541 } __attribute__ ((packed));
 542
 543 static void ieee80211_send_layer2_update(struct sta_info *sta)
 544 {
 545         struct iapp_layer2_update *msg;
 546         struct sk_buff *skb;
 547
 548         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 549          * bridge devices */
 550
 551         skb = dev_alloc_skb(sizeof(*msg));
 552         if (!skb)
 553                 return;
 554         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 555
 556         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 557          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 558
 559         memset(msg->da, 0xff, ETH_ALEN);
 560         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 561         msg->len = htons(6);
 562         msg->dsap = 0;
 563         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 564         msg->control = 0xaf;    /* XID response lsb.1111F101.
 565                                  * F=0 (no poll command; unsolicited frame) */
 566         msg->xid_info[0] = 0x81;        /* XID format identifier */
 567         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 568         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 569
 570         skb->dev = sta->sdata->dev;
 571         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 572         memset(skb->cb, 0, sizeof(skb->cb));
 573         netif_rx(skb);
 574 }
 575
 576 static void sta_apply_parameters(struct ieee80211_local *local,
 577                                  struct sta_info *sta,
 578                                  struct station_parameters *params)
 579 {
 580         u32 rates;
 581         int i, j;
 582         struct ieee80211_supported_band *sband;
 583         struct ieee80211_sub_if_data *sdata = sta->sdata;
 584
 585         /*
 586          * FIXME: updating the flags is racy when this function is
 587          *        called from ieee80211_change_station(), this will
 588          *        be resolved in a future patch.
 589          */
 590
 591         if (params->station_flags & STATION_FLAG_CHANGED) {
 592                 spin_lock_bh(&sta->lock);
 593                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 594                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 595                         sta->flags |= WLAN_STA_AUTHORIZED;
 596
 597                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 598                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 599                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 600
 601                 sta->flags &= ~WLAN_STA_WME;
 602                 if (params->station_flags & STATION_FLAG_WME)
 603                         sta->flags |= WLAN_STA_WME;
 604                 spin_unlock_bh(&sta->lock);
 605         }
 606
 607         /*
 608          * FIXME: updating the following information is racy when this
 609          *        function is called from ieee80211_change_station().
 610          *        However, all this information should be static so
 611          *        maybe we should just reject attemps to change it.
 612          */
 613
 614         if (params->aid) {
 615                 sta->sta.aid = params->aid;
 616                 if (sta->sta.aid > IEEE80211_MAX_AID)
 617                         sta->sta.aid = 0; /* XXX: should this be an error? */
 618         }
 619
 620         if (params->listen_interval >= 0)
 621                 sta->listen_interval = params->listen_interval;
 622
 623         if (params->supported_rates) {
 624                 rates = 0;
 625                 sband = local->hw.wiphy->bands[local->oper_channel->band];
 626
 627                 for (i = 0; i < params->supported_rates_len; i++) {
 628                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 629                         for (j = 0; j < sband->n_bitrates; j++) {
 630                                 if (sband->bitrates[j].bitrate == rate)
 631                                         rates |= BIT(j);
 632                         }
 633                 }
 634                 sta->sta.supp_rates[local->oper_channel->band] = rates;
 635         }
 636
 637         if (params->ht_capa) {
 638                 ieee80211_ht_cap_ie_to_ht_info(params->ht_capa,
 639                                                &sta->sta.ht_info);
 640         }
 641
 642         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 643                 switch (params->plink_action) {
 644                 case PLINK_ACTION_OPEN:
 645                         mesh_plink_open(sta);
 646                         break;
 647                 case PLINK_ACTION_BLOCK:
 648                         mesh_plink_block(sta);
 649                         break;
 650                 }
 651         }
 652 }
 653
 654 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 655                                  u8 *mac, struct station_parameters *params)
 656 {
 657         struct ieee80211_local *local = wiphy_priv(wiphy);
 658         struct sta_info *sta;
 659         struct ieee80211_sub_if_data *sdata;
 660         int err;
 661
 662         /* Prevent a race with changing the rate control algorithm */
 663         if (!netif_running(dev))
 664                 return -ENETDOWN;
 665
 666         if (params->vlan) {
 667                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 668
 669                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 670                     sdata->vif.type != NL80211_IFTYPE_AP)
 671                         return -EINVAL;
 672         } else
 673                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 674
 675         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 676                 return -EINVAL;
 677
 678         if (is_multicast_ether_addr(mac))
 679                 return -EINVAL;
 680
 681         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 682         if (!sta)
 683                 return -ENOMEM;
 684
 685         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 686
 687         sta_apply_parameters(local, sta, params);
 688
 689         rate_control_rate_init(sta);
 690
 691         rcu_read_lock();
 692
 693         err = sta_info_insert(sta);
 694         if (err) {
 695                 /* STA has been freed */
 696                 rcu_read_unlock();
 697                 return err;
 698         }
 699
 700         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 701             sdata->vif.type == NL80211_IFTYPE_AP)
 702                 ieee80211_send_layer2_update(sta);
 703
 704         rcu_read_unlock();
 705
 706         return 0;
 707 }
 708
 709 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 710                                  u8 *mac)
 711 {
 712         struct ieee80211_local *local = wiphy_priv(wiphy);
 713         struct ieee80211_sub_if_data *sdata;
 714         struct sta_info *sta;
 715
 716         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 717
 718         if (mac) {
 719                 rcu_read_lock();
 720
 721                 /* XXX: get sta belonging to dev */
 722                 sta = sta_info_get(local, mac);
 723                 if (!sta) {
 724                         rcu_read_unlock();
 725                         return -ENOENT;
 726                 }
 727
 728                 sta_info_unlink(&sta);
 729                 rcu_read_unlock();
 730
 731                 sta_info_destroy(sta);
 732         } else
 733                 sta_info_flush(local, sdata);
 734
 735         return 0;
 736 }
 737
 738 static int ieee80211_change_station(struct wiphy *wiphy,
 739                                     struct net_device *dev,
 740                                     u8 *mac,
 741                                     struct station_parameters *params)
 742 {
 743         struct ieee80211_local *local = wiphy_priv(wiphy);
 744         struct sta_info *sta;
 745         struct ieee80211_sub_if_data *vlansdata;
 746
 747         rcu_read_lock();
 748
 749         /* XXX: get sta belonging to dev */
 750         sta = sta_info_get(local, mac);
 751         if (!sta) {
 752                 rcu_read_unlock();
 753                 return -ENOENT;
 754         }
 755
 756         if (params->vlan && params->vlan != sta->sdata->dev) {
 757                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 758
 759                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 760                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
 761                         rcu_read_unlock();
 762                         return -EINVAL;
 763                 }
 764
 765                 sta->sdata = vlansdata;
 766                 ieee80211_send_layer2_update(sta);
 767         }
 768
 769         sta_apply_parameters(local, sta, params);
 770
 771         rcu_read_unlock();
 772
 773         return 0;
 774 }
 775
 776 #ifdef CONFIG_MAC80211_MESH
 777 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 778                                  u8 *dst, u8 *next_hop)
 779 {
 780         struct ieee80211_local *local = wiphy_priv(wiphy);
 781         struct ieee80211_sub_if_data *sdata;
 782         struct mesh_path *mpath;
 783         struct sta_info *sta;
 784         int err;
 785
 786         if (!netif_running(dev))
 787                 return -ENETDOWN;
 788
 789         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 790
 791         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 792                 return -ENOTSUPP;
 793
 794         rcu_read_lock();
 795         sta = sta_info_get(local, next_hop);
 796         if (!sta) {
 797                 rcu_read_unlock();
 798                 return -ENOENT;
 799         }
 800
 801         err = mesh_path_add(dst, sdata);
 802         if (err) {
 803                 rcu_read_unlock();
 804                 return err;
 805         }
 806
 807         mpath = mesh_path_lookup(dst, sdata);
 808         if (!mpath) {
 809                 rcu_read_unlock();
 810                 return -ENXIO;
 811         }
 812         mesh_path_fix_nexthop(mpath, sta);
 813
 814         rcu_read_unlock();
 815         return 0;
 816 }
 817
 818 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 819                                  u8 *dst)
 820 {
 821         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 822
 823         if (dst)
 824                 return mesh_path_del(dst, sdata);
 825
 826         mesh_path_flush(sdata);
 827         return 0;
 828 }
 829
 830 static int ieee80211_change_mpath(struct wiphy *wiphy,
 831                                     struct net_device *dev,
 832                                     u8 *dst, u8 *next_hop)
 833 {
 834         struct ieee80211_local *local = wiphy_priv(wiphy);
 835         struct ieee80211_sub_if_data *sdata;
 836         struct mesh_path *mpath;
 837         struct sta_info *sta;
 838
 839         if (!netif_running(dev))
 840                 return -ENETDOWN;
 841
 842         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 843
 844         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 845                 return -ENOTSUPP;
 846
 847         rcu_read_lock();
 848
 849         sta = sta_info_get(local, next_hop);
 850         if (!sta) {
 851                 rcu_read_unlock();
 852                 return -ENOENT;
 853         }
 854
 855         mpath = mesh_path_lookup(dst, sdata);
 856         if (!mpath) {
 857                 rcu_read_unlock();
 858                 return -ENOENT;
 859         }
 860
 861         mesh_path_fix_nexthop(mpath, sta);
 862
 863         rcu_read_unlock();
 864         return 0;
 865 }
 866
 867 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 868                             struct mpath_info *pinfo)
 869 {
 870         if (mpath->next_hop)
 871                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 872         else
 873                 memset(next_hop, 0, ETH_ALEN);
 874
 875         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 876                         MPATH_INFO_DSN |
 877                         MPATH_INFO_METRIC |
 878                         MPATH_INFO_EXPTIME |
 879                         MPATH_INFO_DISCOVERY_TIMEOUT |
 880                         MPATH_INFO_DISCOVERY_RETRIES |
 881                         MPATH_INFO_FLAGS;
 882
 883         pinfo->frame_qlen = mpath->frame_queue.qlen;
 884         pinfo->dsn = mpath->dsn;
 885         pinfo->metric = mpath->metric;
 886         if (time_before(jiffies, mpath->exp_time))
 887                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 888         pinfo->discovery_timeout =
 889                         jiffies_to_msecs(mpath->discovery_timeout);
 890         pinfo->discovery_retries = mpath->discovery_retries;
 891         pinfo->flags = 0;
 892         if (mpath->flags & MESH_PATH_ACTIVE)
 893                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 894         if (mpath->flags & MESH_PATH_RESOLVING)
 895                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 896         if (mpath->flags & MESH_PATH_DSN_VALID)
 897                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 898         if (mpath->flags & MESH_PATH_FIXED)
 899                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 900         if (mpath->flags & MESH_PATH_RESOLVING)
 901                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 902
 903         pinfo->flags = mpath->flags;
 904 }
 905
 906 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 907                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 908
 909 {
 910         struct ieee80211_sub_if_data *sdata;
 911         struct mesh_path *mpath;
 912
 913         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 914
 915         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 916                 return -ENOTSUPP;
 917
 918         rcu_read_lock();
 919         mpath = mesh_path_lookup(dst, sdata);
 920         if (!mpath) {
 921                 rcu_read_unlock();
 922                 return -ENOENT;
 923         }
 924         memcpy(dst, mpath->dst, ETH_ALEN);
 925         mpath_set_pinfo(mpath, next_hop, pinfo);
 926         rcu_read_unlock();
 927         return 0;
 928 }
 929
 930 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 931                                  int idx, u8 *dst, u8 *next_hop,
 932                                  struct mpath_info *pinfo)
 933 {
 934         struct ieee80211_sub_if_data *sdata;
 935         struct mesh_path *mpath;
 936
 937         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 938
 939         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 940                 return -ENOTSUPP;
 941
 942         rcu_read_lock();
 943         mpath = mesh_path_lookup_by_idx(idx, sdata);
 944         if (!mpath) {
 945                 rcu_read_unlock();
 946                 return -ENOENT;
 947         }
 948         memcpy(dst, mpath->dst, ETH_ALEN);
 949         mpath_set_pinfo(mpath, next_hop, pinfo);
 950         rcu_read_unlock();
 951         return 0;
 952 }
 953 #endif
 954
 955 static int ieee80211_change_bss(struct wiphy *wiphy,
 956                                 struct net_device *dev,
 957                                 struct bss_parameters *params)
 958 {
 959         struct ieee80211_sub_if_data *sdata;
 960         u32 changed = 0;
 961
 962         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 963
 964         if (sdata->vif.type != NL80211_IFTYPE_AP)
 965                 return -EINVAL;
 966
 967         if (params->use_cts_prot >= 0) {
 968                 sdata->bss_conf.use_cts_prot = params->use_cts_prot;
 969                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 970         }
 971         if (params->use_short_preamble >= 0) {
 972                 sdata->bss_conf.use_short_preamble =
 973                         params->use_short_preamble;
 974                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 975         }
 976         if (params->use_short_slot_time >= 0) {
 977                 sdata->bss_conf.use_short_slot =
 978                         params->use_short_slot_time;
 979                 changed |= BSS_CHANGED_ERP_SLOT;
 980         }
 981
 982         ieee80211_bss_info_change_notify(sdata, changed);
 983
 984         return 0;
 985 }
 986
 987 struct cfg80211_ops mac80211_config_ops = {
 988         .add_virtual_intf = ieee80211_add_iface,
 989         .del_virtual_intf = ieee80211_del_iface,
 990         .change_virtual_intf = ieee80211_change_iface,
 991         .add_key = ieee80211_add_key,
 992         .del_key = ieee80211_del_key,
 993         .get_key = ieee80211_get_key,
 994         .set_default_key = ieee80211_config_default_key,
 995         .add_beacon = ieee80211_add_beacon,
 996         .set_beacon = ieee80211_set_beacon,
 997         .del_beacon = ieee80211_del_beacon,
 998         .add_station = ieee80211_add_station,
 999         .del_station = ieee80211_del_station,
1000         .change_station = ieee80211_change_station,
1001         .get_station = ieee80211_get_station,
1002         .dump_station = ieee80211_dump_station,
1003 #ifdef CONFIG_MAC80211_MESH
1004         .add_mpath = ieee80211_add_mpath,
1005         .del_mpath = ieee80211_del_mpath,
1006         .change_mpath = ieee80211_change_mpath,
1007         .get_mpath = ieee80211_get_mpath,
1008         .dump_mpath = ieee80211_dump_mpath,
1009 #endif
1010         .change_bss = ieee80211_change_bss,
1011 };