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                 ieee80211_hw_config(sdata->local);
 398                 /*
 399                  * We updated some parameter so if below bails out
 400                  * it's not an error.
 401                  */
 402                 err = 0;
 403         }
 404
 405         /* Need to have a beacon head if we don't have one yet */
 406         if (!params->head && !old)
 407                 return err;
 408
 409         /* sorry, no way to start beaconing without dtim period */
 410         if (!params->dtim_period && !old)
 411                 return err;
 412
 413         /* new or old head? */
 414         if (params->head)
 415                 new_head_len = params->head_len;
 416         else
 417                 new_head_len = old->head_len;
 418
 419         /* new or old tail? */
 420         if (params->tail || !old)
 421                 /* params->tail_len will be zero for !params->tail */
 422                 new_tail_len = params->tail_len;
 423         else
 424                 new_tail_len = old->tail_len;
 425
 426         size = sizeof(*new) + new_head_len + new_tail_len;
 427
 428         new = kzalloc(size, GFP_KERNEL);
 429         if (!new)
 430                 return -ENOMEM;
 431
 432         /* start filling the new info now */
 433
 434         /* new or old dtim period? */
 435         if (params->dtim_period)
 436                 new->dtim_period = params->dtim_period;
 437         else
 438                 new->dtim_period = old->dtim_period;
 439
 440         /*
 441          * pointers go into the block we allocated,
 442          * memory is | beacon_data | head | tail |
 443          */
 444         new->head = ((u8 *) new) + sizeof(*new);
 445         new->tail = new->head + new_head_len;
 446         new->head_len = new_head_len;
 447         new->tail_len = new_tail_len;
 448
 449         /* copy in head */
 450         if (params->head)
 451                 memcpy(new->head, params->head, new_head_len);
 452         else
 453                 memcpy(new->head, old->head, new_head_len);
 454
 455         /* copy in optional tail */
 456         if (params->tail)
 457                 memcpy(new->tail, params->tail, new_tail_len);
 458         else
 459                 if (old)
 460                         memcpy(new->tail, old->tail, new_tail_len);
 461
 462         rcu_assign_pointer(sdata->u.ap.beacon, new);
 463
 464         synchronize_rcu();
 465
 466         kfree(old);
 467
 468         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 469 }
 470
 471 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 472                                 struct beacon_parameters *params)
 473 {
 474         struct ieee80211_sub_if_data *sdata;
 475         struct beacon_data *old;
 476
 477         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 478
 479         if (sdata->vif.type != NL80211_IFTYPE_AP)
 480                 return -EINVAL;
 481
 482         old = sdata->u.ap.beacon;
 483
 484         if (old)
 485                 return -EALREADY;
 486
 487         return ieee80211_config_beacon(sdata, params);
 488 }
 489
 490 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 491                                 struct beacon_parameters *params)
 492 {
 493         struct ieee80211_sub_if_data *sdata;
 494         struct beacon_data *old;
 495
 496         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 497
 498         if (sdata->vif.type != NL80211_IFTYPE_AP)
 499                 return -EINVAL;
 500
 501         old = sdata->u.ap.beacon;
 502
 503         if (!old)
 504                 return -ENOENT;
 505
 506         return ieee80211_config_beacon(sdata, params);
 507 }
 508
 509 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 510 {
 511         struct ieee80211_sub_if_data *sdata;
 512         struct beacon_data *old;
 513
 514         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515
 516         if (sdata->vif.type != NL80211_IFTYPE_AP)
 517                 return -EINVAL;
 518
 519         old = sdata->u.ap.beacon;
 520
 521         if (!old)
 522                 return -ENOENT;
 523
 524         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 525         synchronize_rcu();
 526         kfree(old);
 527
 528         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 529 }
 530
 531 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 532 struct iapp_layer2_update {
 533         u8 da[ETH_ALEN];        /* broadcast */
 534         u8 sa[ETH_ALEN];        /* STA addr */
 535         __be16 len;             /* 6 */
 536         u8 dsap;                /* 0 */
 537         u8 ssap;                /* 0 */
 538         u8 control;
 539         u8 xid_info[3];
 540 } __attribute__ ((packed));
 541
 542 static void ieee80211_send_layer2_update(struct sta_info *sta)
 543 {
 544         struct iapp_layer2_update *msg;
 545         struct sk_buff *skb;
 546
 547         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 548          * bridge devices */
 549
 550         skb = dev_alloc_skb(sizeof(*msg));
 551         if (!skb)
 552                 return;
 553         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 554
 555         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 556          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 557
 558         memset(msg->da, 0xff, ETH_ALEN);
 559         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 560         msg->len = htons(6);
 561         msg->dsap = 0;
 562         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 563         msg->control = 0xaf;    /* XID response lsb.1111F101.
 564                                  * F=0 (no poll command; unsolicited frame) */
 565         msg->xid_info[0] = 0x81;        /* XID format identifier */
 566         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 567         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 568
 569         skb->dev = sta->sdata->dev;
 570         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 571         memset(skb->cb, 0, sizeof(skb->cb));
 572         netif_rx(skb);
 573 }
 574
 575 static void sta_apply_parameters(struct ieee80211_local *local,
 576                                  struct sta_info *sta,
 577                                  struct station_parameters *params)
 578 {
 579         u32 rates;
 580         int i, j;
 581         struct ieee80211_supported_band *sband;
 582         struct ieee80211_sub_if_data *sdata = sta->sdata;
 583
 584         /*
 585          * FIXME: updating the flags is racy when this function is
 586          *        called from ieee80211_change_station(), this will
 587          *        be resolved in a future patch.
 588          */
 589
 590         if (params->station_flags & STATION_FLAG_CHANGED) {
 591                 spin_lock_bh(&sta->lock);
 592                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 593                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 594                         sta->flags |= WLAN_STA_AUTHORIZED;
 595
 596                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 597                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 598                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 599
 600                 sta->flags &= ~WLAN_STA_WME;
 601                 if (params->station_flags & STATION_FLAG_WME)
 602                         sta->flags |= WLAN_STA_WME;
 603                 spin_unlock_bh(&sta->lock);
 604         }
 605
 606         /*
 607          * FIXME: updating the following information is racy when this
 608          *        function is called from ieee80211_change_station().
 609          *        However, all this information should be static so
 610          *        maybe we should just reject attemps to change it.
 611          */
 612
 613         if (params->aid) {
 614                 sta->sta.aid = params->aid;
 615                 if (sta->sta.aid > IEEE80211_MAX_AID)
 616                         sta->sta.aid = 0; /* XXX: should this be an error? */
 617         }
 618
 619         if (params->listen_interval >= 0)
 620                 sta->listen_interval = params->listen_interval;
 621
 622         if (params->supported_rates) {
 623                 rates = 0;
 624                 sband = local->hw.wiphy->bands[local->oper_channel->band];
 625
 626                 for (i = 0; i < params->supported_rates_len; i++) {
 627                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 628                         for (j = 0; j < sband->n_bitrates; j++) {
 629                                 if (sband->bitrates[j].bitrate == rate)
 630                                         rates |= BIT(j);
 631                         }
 632                 }
 633                 sta->sta.supp_rates[local->oper_channel->band] = rates;
 634         }
 635
 636         if (params->ht_capa)
 637                 ieee80211_ht_cap_ie_to_sta_ht_cap(params->ht_capa,
 638                                                   &sta->sta.ht_cap);
 639
 640         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 641                 switch (params->plink_action) {
 642                 case PLINK_ACTION_OPEN:
 643                         mesh_plink_open(sta);
 644                         break;
 645                 case PLINK_ACTION_BLOCK:
 646                         mesh_plink_block(sta);
 647                         break;
 648                 }
 649         }
 650 }
 651
 652 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 653                                  u8 *mac, struct station_parameters *params)
 654 {
 655         struct ieee80211_local *local = wiphy_priv(wiphy);
 656         struct sta_info *sta;
 657         struct ieee80211_sub_if_data *sdata;
 658         int err;
 659
 660         /* Prevent a race with changing the rate control algorithm */
 661         if (!netif_running(dev))
 662                 return -ENETDOWN;
 663
 664         if (params->vlan) {
 665                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 666
 667                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 668                     sdata->vif.type != NL80211_IFTYPE_AP)
 669                         return -EINVAL;
 670         } else
 671                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 672
 673         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 674                 return -EINVAL;
 675
 676         if (is_multicast_ether_addr(mac))
 677                 return -EINVAL;
 678
 679         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 680         if (!sta)
 681                 return -ENOMEM;
 682
 683         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 684
 685         sta_apply_parameters(local, sta, params);
 686
 687         rate_control_rate_init(sta);
 688
 689         rcu_read_lock();
 690
 691         err = sta_info_insert(sta);
 692         if (err) {
 693                 /* STA has been freed */
 694                 rcu_read_unlock();
 695                 return err;
 696         }
 697
 698         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 699             sdata->vif.type == NL80211_IFTYPE_AP)
 700                 ieee80211_send_layer2_update(sta);
 701
 702         rcu_read_unlock();
 703
 704         return 0;
 705 }
 706
 707 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 708                                  u8 *mac)
 709 {
 710         struct ieee80211_local *local = wiphy_priv(wiphy);
 711         struct ieee80211_sub_if_data *sdata;
 712         struct sta_info *sta;
 713
 714         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 715
 716         if (mac) {
 717                 rcu_read_lock();
 718
 719                 /* XXX: get sta belonging to dev */
 720                 sta = sta_info_get(local, mac);
 721                 if (!sta) {
 722                         rcu_read_unlock();
 723                         return -ENOENT;
 724                 }
 725
 726                 sta_info_unlink(&sta);
 727                 rcu_read_unlock();
 728
 729                 sta_info_destroy(sta);
 730         } else
 731                 sta_info_flush(local, sdata);
 732
 733         return 0;
 734 }
 735
 736 static int ieee80211_change_station(struct wiphy *wiphy,
 737                                     struct net_device *dev,
 738                                     u8 *mac,
 739                                     struct station_parameters *params)
 740 {
 741         struct ieee80211_local *local = wiphy_priv(wiphy);
 742         struct sta_info *sta;
 743         struct ieee80211_sub_if_data *vlansdata;
 744
 745         rcu_read_lock();
 746
 747         /* XXX: get sta belonging to dev */
 748         sta = sta_info_get(local, mac);
 749         if (!sta) {
 750                 rcu_read_unlock();
 751                 return -ENOENT;
 752         }
 753
 754         if (params->vlan && params->vlan != sta->sdata->dev) {
 755                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 756
 757                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 758                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
 759                         rcu_read_unlock();
 760                         return -EINVAL;
 761                 }
 762
 763                 sta->sdata = vlansdata;
 764                 ieee80211_send_layer2_update(sta);
 765         }
 766
 767         sta_apply_parameters(local, sta, params);
 768
 769         rcu_read_unlock();
 770
 771         return 0;
 772 }
 773
 774 #ifdef CONFIG_MAC80211_MESH
 775 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 776                                  u8 *dst, u8 *next_hop)
 777 {
 778         struct ieee80211_local *local = wiphy_priv(wiphy);
 779         struct ieee80211_sub_if_data *sdata;
 780         struct mesh_path *mpath;
 781         struct sta_info *sta;
 782         int err;
 783
 784         if (!netif_running(dev))
 785                 return -ENETDOWN;
 786
 787         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 788
 789         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 790                 return -ENOTSUPP;
 791
 792         rcu_read_lock();
 793         sta = sta_info_get(local, next_hop);
 794         if (!sta) {
 795                 rcu_read_unlock();
 796                 return -ENOENT;
 797         }
 798
 799         err = mesh_path_add(dst, sdata);
 800         if (err) {
 801                 rcu_read_unlock();
 802                 return err;
 803         }
 804
 805         mpath = mesh_path_lookup(dst, sdata);
 806         if (!mpath) {
 807                 rcu_read_unlock();
 808                 return -ENXIO;
 809         }
 810         mesh_path_fix_nexthop(mpath, sta);
 811
 812         rcu_read_unlock();
 813         return 0;
 814 }
 815
 816 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 817                                  u8 *dst)
 818 {
 819         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 820
 821         if (dst)
 822                 return mesh_path_del(dst, sdata);
 823
 824         mesh_path_flush(sdata);
 825         return 0;
 826 }
 827
 828 static int ieee80211_change_mpath(struct wiphy *wiphy,
 829                                     struct net_device *dev,
 830                                     u8 *dst, u8 *next_hop)
 831 {
 832         struct ieee80211_local *local = wiphy_priv(wiphy);
 833         struct ieee80211_sub_if_data *sdata;
 834         struct mesh_path *mpath;
 835         struct sta_info *sta;
 836
 837         if (!netif_running(dev))
 838                 return -ENETDOWN;
 839
 840         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 841
 842         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 843                 return -ENOTSUPP;
 844
 845         rcu_read_lock();
 846
 847         sta = sta_info_get(local, next_hop);
 848         if (!sta) {
 849                 rcu_read_unlock();
 850                 return -ENOENT;
 851         }
 852
 853         mpath = mesh_path_lookup(dst, sdata);
 854         if (!mpath) {
 855                 rcu_read_unlock();
 856                 return -ENOENT;
 857         }
 858
 859         mesh_path_fix_nexthop(mpath, sta);
 860
 861         rcu_read_unlock();
 862         return 0;
 863 }
 864
 865 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 866                             struct mpath_info *pinfo)
 867 {
 868         if (mpath->next_hop)
 869                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 870         else
 871                 memset(next_hop, 0, ETH_ALEN);
 872
 873         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 874                         MPATH_INFO_DSN |
 875                         MPATH_INFO_METRIC |
 876                         MPATH_INFO_EXPTIME |
 877                         MPATH_INFO_DISCOVERY_TIMEOUT |
 878                         MPATH_INFO_DISCOVERY_RETRIES |
 879                         MPATH_INFO_FLAGS;
 880
 881         pinfo->frame_qlen = mpath->frame_queue.qlen;
 882         pinfo->dsn = mpath->dsn;
 883         pinfo->metric = mpath->metric;
 884         if (time_before(jiffies, mpath->exp_time))
 885                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 886         pinfo->discovery_timeout =
 887                         jiffies_to_msecs(mpath->discovery_timeout);
 888         pinfo->discovery_retries = mpath->discovery_retries;
 889         pinfo->flags = 0;
 890         if (mpath->flags & MESH_PATH_ACTIVE)
 891                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 892         if (mpath->flags & MESH_PATH_RESOLVING)
 893                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 894         if (mpath->flags & MESH_PATH_DSN_VALID)
 895                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 896         if (mpath->flags & MESH_PATH_FIXED)
 897                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 898         if (mpath->flags & MESH_PATH_RESOLVING)
 899                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 900
 901         pinfo->flags = mpath->flags;
 902 }
 903
 904 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 905                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 906
 907 {
 908         struct ieee80211_sub_if_data *sdata;
 909         struct mesh_path *mpath;
 910
 911         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 912
 913         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 914                 return -ENOTSUPP;
 915
 916         rcu_read_lock();
 917         mpath = mesh_path_lookup(dst, sdata);
 918         if (!mpath) {
 919                 rcu_read_unlock();
 920                 return -ENOENT;
 921         }
 922         memcpy(dst, mpath->dst, ETH_ALEN);
 923         mpath_set_pinfo(mpath, next_hop, pinfo);
 924         rcu_read_unlock();
 925         return 0;
 926 }
 927
 928 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 929                                  int idx, u8 *dst, u8 *next_hop,
 930                                  struct mpath_info *pinfo)
 931 {
 932         struct ieee80211_sub_if_data *sdata;
 933         struct mesh_path *mpath;
 934
 935         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 936
 937         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 938                 return -ENOTSUPP;
 939
 940         rcu_read_lock();
 941         mpath = mesh_path_lookup_by_idx(idx, sdata);
 942         if (!mpath) {
 943                 rcu_read_unlock();
 944                 return -ENOENT;
 945         }
 946         memcpy(dst, mpath->dst, ETH_ALEN);
 947         mpath_set_pinfo(mpath, next_hop, pinfo);
 948         rcu_read_unlock();
 949         return 0;
 950 }
 951 #endif
 952
 953 static int ieee80211_change_bss(struct wiphy *wiphy,
 954                                 struct net_device *dev,
 955                                 struct bss_parameters *params)
 956 {
 957         struct ieee80211_sub_if_data *sdata;
 958         u32 changed = 0;
 959
 960         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 961
 962         if (sdata->vif.type != NL80211_IFTYPE_AP)
 963                 return -EINVAL;
 964
 965         if (params->use_cts_prot >= 0) {
 966                 sdata->bss_conf.use_cts_prot = params->use_cts_prot;
 967                 changed |= BSS_CHANGED_ERP_CTS_PROT;
 968         }
 969         if (params->use_short_preamble >= 0) {
 970                 sdata->bss_conf.use_short_preamble =
 971                         params->use_short_preamble;
 972                 changed |= BSS_CHANGED_ERP_PREAMBLE;
 973         }
 974         if (params->use_short_slot_time >= 0) {
 975                 sdata->bss_conf.use_short_slot =
 976                         params->use_short_slot_time;
 977                 changed |= BSS_CHANGED_ERP_SLOT;
 978         }
 979
 980         ieee80211_bss_info_change_notify(sdata, changed);
 981
 982         return 0;
 983 }
 984
 985 struct cfg80211_ops mac80211_config_ops = {
 986         .add_virtual_intf = ieee80211_add_iface,
 987         .del_virtual_intf = ieee80211_del_iface,
 988         .change_virtual_intf = ieee80211_change_iface,
 989         .add_key = ieee80211_add_key,
 990         .del_key = ieee80211_del_key,
 991         .get_key = ieee80211_get_key,
 992         .set_default_key = ieee80211_config_default_key,
 993         .add_beacon = ieee80211_add_beacon,
 994         .set_beacon = ieee80211_set_beacon,
 995         .del_beacon = ieee80211_del_beacon,
 996         .add_station = ieee80211_add_station,
 997         .del_station = ieee80211_del_station,
 998         .change_station = ieee80211_change_station,
 999         .get_station = ieee80211_get_station,
1000         .dump_station = ieee80211_dump_station,
1001 #ifdef CONFIG_MAC80211_MESH
1002         .add_mpath = ieee80211_add_mpath,
1003         .del_mpath = ieee80211_del_mpath,
1004         .change_mpath = ieee80211_change_mpath,
1005         .get_mpath = ieee80211_get_mpath,
1006         .dump_mpath = ieee80211_dump_mpath,
1007 #endif
1008         .change_bss = ieee80211_change_bss,
1009 };