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                                     IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
 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         sband = local->hw.wiphy->bands[local->oper_channel->band];
 586
 587         /*
 588          * FIXME: updating the flags is racy when this function is
 589          *        called from ieee80211_change_station(), this will
 590          *        be resolved in a future patch.
 591          */
 592
 593         if (params->station_flags & STATION_FLAG_CHANGED) {
 594                 spin_lock_bh(&sta->lock);
 595                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 596                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 597                         sta->flags |= WLAN_STA_AUTHORIZED;
 598
 599                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 600                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 601                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 602
 603                 sta->flags &= ~WLAN_STA_WME;
 604                 if (params->station_flags & STATION_FLAG_WME)
 605                         sta->flags |= WLAN_STA_WME;
 606                 spin_unlock_bh(&sta->lock);
 607         }
 608
 609         /*
 610          * FIXME: updating the following information is racy when this
 611          *        function is called from ieee80211_change_station().
 612          *        However, all this information should be static so
 613          *        maybe we should just reject attemps to change it.
 614          */
 615
 616         if (params->aid) {
 617                 sta->sta.aid = params->aid;
 618                 if (sta->sta.aid > IEEE80211_MAX_AID)
 619                         sta->sta.aid = 0; /* XXX: should this be an error? */
 620         }
 621
 622         if (params->listen_interval >= 0)
 623                 sta->listen_interval = params->listen_interval;
 624
 625         if (params->supported_rates) {
 626                 rates = 0;
 627
 628                 for (i = 0; i < params->supported_rates_len; i++) {
 629                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 630                         for (j = 0; j < sband->n_bitrates; j++) {
 631                                 if (sband->bitrates[j].bitrate == rate)
 632                                         rates |= BIT(j);
 633                         }
 634                 }
 635                 sta->sta.supp_rates[local->oper_channel->band] = rates;
 636         }
 637
 638         if (params->ht_capa)
 639                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
 640                                                   params->ht_capa,
 641                                                   &sta->sta.ht_cap);
 642
 643         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 644                 switch (params->plink_action) {
 645                 case PLINK_ACTION_OPEN:
 646                         mesh_plink_open(sta);
 647                         break;
 648                 case PLINK_ACTION_BLOCK:
 649                         mesh_plink_block(sta);
 650                         break;
 651                 }
 652         }
 653 }
 654
 655 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 656                                  u8 *mac, struct station_parameters *params)
 657 {
 658         struct ieee80211_local *local = wiphy_priv(wiphy);
 659         struct sta_info *sta;
 660         struct ieee80211_sub_if_data *sdata;
 661         int err;
 662
 663         /* Prevent a race with changing the rate control algorithm */
 664         if (!netif_running(dev))
 665                 return -ENETDOWN;
 666
 667         if (params->vlan) {
 668                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 669
 670                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 671                     sdata->vif.type != NL80211_IFTYPE_AP)
 672                         return -EINVAL;
 673         } else
 674                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 675
 676         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 677                 return -EINVAL;
 678
 679         if (is_multicast_ether_addr(mac))
 680                 return -EINVAL;
 681
 682         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 683         if (!sta)
 684                 return -ENOMEM;
 685
 686         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 687
 688         sta_apply_parameters(local, sta, params);
 689
 690         rate_control_rate_init(sta);
 691
 692         rcu_read_lock();
 693
 694         err = sta_info_insert(sta);
 695         if (err) {
 696                 /* STA has been freed */
 697                 rcu_read_unlock();
 698                 return err;
 699         }
 700
 701         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 702             sdata->vif.type == NL80211_IFTYPE_AP)
 703                 ieee80211_send_layer2_update(sta);
 704
 705         rcu_read_unlock();
 706
 707         return 0;
 708 }
 709
 710 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 711                                  u8 *mac)
 712 {
 713         struct ieee80211_local *local = wiphy_priv(wiphy);
 714         struct ieee80211_sub_if_data *sdata;
 715         struct sta_info *sta;
 716
 717         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 718
 719         if (mac) {
 720                 rcu_read_lock();
 721
 722                 /* XXX: get sta belonging to dev */
 723                 sta = sta_info_get(local, mac);
 724                 if (!sta) {
 725                         rcu_read_unlock();
 726                         return -ENOENT;
 727                 }
 728
 729                 sta_info_unlink(&sta);
 730                 rcu_read_unlock();
 731
 732                 sta_info_destroy(sta);
 733         } else
 734                 sta_info_flush(local, sdata);
 735
 736         return 0;
 737 }
 738
 739 static int ieee80211_change_station(struct wiphy *wiphy,
 740                                     struct net_device *dev,
 741                                     u8 *mac,
 742                                     struct station_parameters *params)
 743 {
 744         struct ieee80211_local *local = wiphy_priv(wiphy);
 745         struct sta_info *sta;
 746         struct ieee80211_sub_if_data *vlansdata;
 747
 748         rcu_read_lock();
 749
 750         /* XXX: get sta belonging to dev */
 751         sta = sta_info_get(local, mac);
 752         if (!sta) {
 753                 rcu_read_unlock();
 754                 return -ENOENT;
 755         }
 756
 757         if (params->vlan && params->vlan != sta->sdata->dev) {
 758                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 759
 760                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 761                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
 762                         rcu_read_unlock();
 763                         return -EINVAL;
 764                 }
 765
 766                 sta->sdata = vlansdata;
 767                 ieee80211_send_layer2_update(sta);
 768         }
 769
 770         sta_apply_parameters(local, sta, params);
 771
 772         rcu_read_unlock();
 773
 774         return 0;
 775 }
 776
 777 #ifdef CONFIG_MAC80211_MESH
 778 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 779                                  u8 *dst, u8 *next_hop)
 780 {
 781         struct ieee80211_local *local = wiphy_priv(wiphy);
 782         struct ieee80211_sub_if_data *sdata;
 783         struct mesh_path *mpath;
 784         struct sta_info *sta;
 785         int err;
 786
 787         if (!netif_running(dev))
 788                 return -ENETDOWN;
 789
 790         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 791
 792         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 793                 return -ENOTSUPP;
 794
 795         rcu_read_lock();
 796         sta = sta_info_get(local, next_hop);
 797         if (!sta) {
 798                 rcu_read_unlock();
 799                 return -ENOENT;
 800         }
 801
 802         err = mesh_path_add(dst, sdata);
 803         if (err) {
 804                 rcu_read_unlock();
 805                 return err;
 806         }
 807
 808         mpath = mesh_path_lookup(dst, sdata);
 809         if (!mpath) {
 810                 rcu_read_unlock();
 811                 return -ENXIO;
 812         }
 813         mesh_path_fix_nexthop(mpath, sta);
 814
 815         rcu_read_unlock();
 816         return 0;
 817 }
 818
 819 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 820                                  u8 *dst)
 821 {
 822         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 823
 824         if (dst)
 825                 return mesh_path_del(dst, sdata);
 826
 827         mesh_path_flush(sdata);
 828         return 0;
 829 }
 830
 831 static int ieee80211_change_mpath(struct wiphy *wiphy,
 832                                     struct net_device *dev,
 833                                     u8 *dst, u8 *next_hop)
 834 {
 835         struct ieee80211_local *local = wiphy_priv(wiphy);
 836         struct ieee80211_sub_if_data *sdata;
 837         struct mesh_path *mpath;
 838         struct sta_info *sta;
 839
 840         if (!netif_running(dev))
 841                 return -ENETDOWN;
 842
 843         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 844
 845         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 846                 return -ENOTSUPP;
 847
 848         rcu_read_lock();
 849
 850         sta = sta_info_get(local, next_hop);
 851         if (!sta) {
 852                 rcu_read_unlock();
 853                 return -ENOENT;
 854         }
 855
 856         mpath = mesh_path_lookup(dst, sdata);
 857         if (!mpath) {
 858                 rcu_read_unlock();
 859                 return -ENOENT;
 860         }
 861
 862         mesh_path_fix_nexthop(mpath, sta);
 863
 864         rcu_read_unlock();
 865         return 0;
 866 }
 867
 868 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 869                             struct mpath_info *pinfo)
 870 {
 871         if (mpath->next_hop)
 872                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 873         else
 874                 memset(next_hop, 0, ETH_ALEN);
 875
 876         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 877                         MPATH_INFO_DSN |
 878                         MPATH_INFO_METRIC |
 879                         MPATH_INFO_EXPTIME |
 880                         MPATH_INFO_DISCOVERY_TIMEOUT |
 881                         MPATH_INFO_DISCOVERY_RETRIES |
 882                         MPATH_INFO_FLAGS;
 883
 884         pinfo->frame_qlen = mpath->frame_queue.qlen;
 885         pinfo->dsn = mpath->dsn;
 886         pinfo->metric = mpath->metric;
 887         if (time_before(jiffies, mpath->exp_time))
 888                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 889         pinfo->discovery_timeout =
 890                         jiffies_to_msecs(mpath->discovery_timeout);
 891         pinfo->discovery_retries = mpath->discovery_retries;
 892         pinfo->flags = 0;
 893         if (mpath->flags & MESH_PATH_ACTIVE)
 894                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 895         if (mpath->flags & MESH_PATH_RESOLVING)
 896                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 897         if (mpath->flags & MESH_PATH_DSN_VALID)
 898                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 899         if (mpath->flags & MESH_PATH_FIXED)
 900                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 901         if (mpath->flags & MESH_PATH_RESOLVING)
 902                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 903
 904         pinfo->flags = mpath->flags;
 905 }
 906
 907 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 908                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 909
 910 {
 911         struct ieee80211_sub_if_data *sdata;
 912         struct mesh_path *mpath;
 913
 914         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 915
 916         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 917                 return -ENOTSUPP;
 918
 919         rcu_read_lock();
 920         mpath = mesh_path_lookup(dst, sdata);
 921         if (!mpath) {
 922                 rcu_read_unlock();
 923                 return -ENOENT;
 924         }
 925         memcpy(dst, mpath->dst, ETH_ALEN);
 926         mpath_set_pinfo(mpath, next_hop, pinfo);
 927         rcu_read_unlock();
 928         return 0;
 929 }
 930
 931 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 932                                  int idx, u8 *dst, u8 *next_hop,
 933                                  struct mpath_info *pinfo)
 934 {
 935         struct ieee80211_sub_if_data *sdata;
 936         struct mesh_path *mpath;
 937
 938         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 939
 940         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 941                 return -ENOTSUPP;
 942
 943         rcu_read_lock();
 944         mpath = mesh_path_lookup_by_idx(idx, sdata);
 945         if (!mpath) {
 946                 rcu_read_unlock();
 947                 return -ENOENT;
 948         }
 949         memcpy(dst, mpath->dst, ETH_ALEN);
 950         mpath_set_pinfo(mpath, next_hop, pinfo);
 951         rcu_read_unlock();
 952         return 0;
 953 }
 954
 955 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
 956                                 struct net_device *dev,
 957                                 struct mesh_config *conf)
 958 {
 959         struct ieee80211_sub_if_data *sdata;
 960         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 961
 962         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 963                 return -ENOTSUPP;
 964         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
 965         return 0;
 966 }
 967
 968 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
 969 {
 970         return (mask >> (parm-1)) & 0x1;
 971 }
 972
 973 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
 974                                 struct net_device *dev,
 975                                 const struct mesh_config *nconf, u32 mask)
 976 {
 977         struct mesh_config *conf;
 978         struct ieee80211_sub_if_data *sdata;
 979         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 980
 981         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 982                 return -ENOTSUPP;
 983
 984         /* Set the config options which we are interested in setting */
 985         conf = &(sdata->u.mesh.mshcfg);
 986         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
 987                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
 988         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
 989                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
 990         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
 991                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
 992         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
 993                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
 994         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
 995                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
 996         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
 997                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
 998         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
 999                 conf->auto_open_plinks = nconf->auto_open_plinks;
1000         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1001                 conf->dot11MeshHWMPmaxPREQretries =
1002                         nconf->dot11MeshHWMPmaxPREQretries;
1003         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1004                 conf->path_refresh_time = nconf->path_refresh_time;
1005         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1006                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1007         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1008                 conf->dot11MeshHWMPactivePathTimeout =
1009                         nconf->dot11MeshHWMPactivePathTimeout;
1010         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1011                 conf->dot11MeshHWMPpreqMinInterval =
1012                         nconf->dot11MeshHWMPpreqMinInterval;
1013         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1014                            mask))
1015                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1016                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1017         return 0;
1018 }
1019
1020 #endif
1021
1022 static int ieee80211_change_bss(struct wiphy *wiphy,
1023                                 struct net_device *dev,
1024                                 struct bss_parameters *params)
1025 {
1026         struct ieee80211_sub_if_data *sdata;
1027         u32 changed = 0;
1028
1029         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1030
1031         if (sdata->vif.type != NL80211_IFTYPE_AP)
1032                 return -EINVAL;
1033
1034         if (params->use_cts_prot >= 0) {
1035                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1036                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1037         }
1038         if (params->use_short_preamble >= 0) {
1039                 sdata->vif.bss_conf.use_short_preamble =
1040                         params->use_short_preamble;
1041                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1042         }
1043         if (params->use_short_slot_time >= 0) {
1044                 sdata->vif.bss_conf.use_short_slot =
1045                         params->use_short_slot_time;
1046                 changed |= BSS_CHANGED_ERP_SLOT;
1047         }
1048
1049         ieee80211_bss_info_change_notify(sdata, changed);
1050
1051         return 0;
1052 }
1053
1054 struct cfg80211_ops mac80211_config_ops = {
1055         .add_virtual_intf = ieee80211_add_iface,
1056         .del_virtual_intf = ieee80211_del_iface,
1057         .change_virtual_intf = ieee80211_change_iface,
1058         .add_key = ieee80211_add_key,
1059         .del_key = ieee80211_del_key,
1060         .get_key = ieee80211_get_key,
1061         .set_default_key = ieee80211_config_default_key,
1062         .add_beacon = ieee80211_add_beacon,
1063         .set_beacon = ieee80211_set_beacon,
1064         .del_beacon = ieee80211_del_beacon,
1065         .add_station = ieee80211_add_station,
1066         .del_station = ieee80211_del_station,
1067         .change_station = ieee80211_change_station,
1068         .get_station = ieee80211_get_station,
1069         .dump_station = ieee80211_dump_station,
1070 #ifdef CONFIG_MAC80211_MESH
1071         .add_mpath = ieee80211_add_mpath,
1072         .del_mpath = ieee80211_del_mpath,
1073         .change_mpath = ieee80211_change_mpath,
1074         .get_mpath = ieee80211_get_mpath,
1075         .dump_mpath = ieee80211_dump_mpath,
1076         .set_mesh_params = ieee80211_set_mesh_params,
1077         .get_mesh_params = ieee80211_get_mesh_params,
1078 #endif
1079         .change_bss = ieee80211_change_bss,
1080 };