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_AP:
  30         case NL80211_IFTYPE_AP_VLAN:
  31         case NL80211_IFTYPE_WDS:
  32                 return true;
  33         default:
  34                 return false;
  35         }
  36 }
  37
  38 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
  39                                enum nl80211_iftype type, u32 *flags,
  40                                struct vif_params *params)
  41 {
  42         struct ieee80211_local *local = wiphy_priv(wiphy);
  43         struct net_device *dev;
  44         struct ieee80211_sub_if_data *sdata;
  45         int err;
  46
  47         if (!nl80211_type_check(type))
  48                 return -EINVAL;
  49
  50         err = ieee80211_if_add(local, name, &dev, type, params);
  51         if (err || type != NL80211_IFTYPE_MONITOR || !flags)
  52                 return err;
  53
  54         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  55         sdata->u.mntr_flags = *flags;
  56         return 0;
  57 }
  58
  59 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
  60 {
  61         struct net_device *dev;
  62         struct ieee80211_sub_if_data *sdata;
  63
  64         /* we're under RTNL */
  65         dev = __dev_get_by_index(&init_net, ifindex);
  66         if (!dev)
  67                 return -ENODEV;
  68
  69         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  70
  71         ieee80211_if_remove(sdata);
  72
  73         return 0;
  74 }
  75
  76 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
  77                                   enum nl80211_iftype type, u32 *flags,
  78                                   struct vif_params *params)
  79 {
  80         struct net_device *dev;
  81         struct ieee80211_sub_if_data *sdata;
  82         int ret;
  83
  84         /* we're under RTNL */
  85         dev = __dev_get_by_index(&init_net, ifindex);
  86         if (!dev)
  87                 return -ENODEV;
  88
  89         if (!nl80211_type_check(type))
  90                 return -EINVAL;
  91
  92         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  93
  94         ret = ieee80211_if_change_type(sdata, type);
  95         if (ret)
  96                 return ret;
  97
  98         if (netif_running(sdata->dev))
  99                 return -EBUSY;
 100
 101         if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
 102                 ieee80211_sdata_set_mesh_id(sdata,
 103                                             params->mesh_id_len,
 104                                             params->mesh_id);
 105
 106         if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !flags)
 107                 return 0;
 108
 109         sdata->u.mntr_flags = *flags;
 110         return 0;
 111 }
 112
 113 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 114                              u8 key_idx, u8 *mac_addr,
 115                              struct key_params *params)
 116 {
 117         struct ieee80211_sub_if_data *sdata;
 118         struct sta_info *sta = NULL;
 119         enum ieee80211_key_alg alg;
 120         struct ieee80211_key *key;
 121         int err;
 122
 123         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 124
 125         switch (params->cipher) {
 126         case WLAN_CIPHER_SUITE_WEP40:
 127         case WLAN_CIPHER_SUITE_WEP104:
 128                 alg = ALG_WEP;
 129                 break;
 130         case WLAN_CIPHER_SUITE_TKIP:
 131                 alg = ALG_TKIP;
 132                 break;
 133         case WLAN_CIPHER_SUITE_CCMP:
 134                 alg = ALG_CCMP;
 135                 break;
 136         default:
 137                 return -EINVAL;
 138         }
 139
 140         key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
 141         if (!key)
 142                 return -ENOMEM;
 143
 144         rcu_read_lock();
 145
 146         if (mac_addr) {
 147                 sta = sta_info_get(sdata->local, mac_addr);
 148                 if (!sta) {
 149                         ieee80211_key_free(key);
 150                         err = -ENOENT;
 151                         goto out_unlock;
 152                 }
 153         }
 154
 155         ieee80211_key_link(key, sdata, sta);
 156
 157         err = 0;
 158  out_unlock:
 159         rcu_read_unlock();
 160
 161         return err;
 162 }
 163
 164 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 165                              u8 key_idx, u8 *mac_addr)
 166 {
 167         struct ieee80211_sub_if_data *sdata;
 168         struct sta_info *sta;
 169         int ret;
 170
 171         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 172
 173         rcu_read_lock();
 174
 175         if (mac_addr) {
 176                 ret = -ENOENT;
 177
 178                 sta = sta_info_get(sdata->local, mac_addr);
 179                 if (!sta)
 180                         goto out_unlock;
 181
 182                 if (sta->key) {
 183                         ieee80211_key_free(sta->key);
 184                         WARN_ON(sta->key);
 185                         ret = 0;
 186                 }
 187
 188                 goto out_unlock;
 189         }
 190
 191         if (!sdata->keys[key_idx]) {
 192                 ret = -ENOENT;
 193                 goto out_unlock;
 194         }
 195
 196         ieee80211_key_free(sdata->keys[key_idx]);
 197         WARN_ON(sdata->keys[key_idx]);
 198
 199         ret = 0;
 200  out_unlock:
 201         rcu_read_unlock();
 202
 203         return ret;
 204 }
 205
 206 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 207                              u8 key_idx, u8 *mac_addr, void *cookie,
 208                              void (*callback)(void *cookie,
 209                                               struct key_params *params))
 210 {
 211         struct ieee80211_sub_if_data *sdata;
 212         struct sta_info *sta = NULL;
 213         u8 seq[6] = {0};
 214         struct key_params params;
 215         struct ieee80211_key *key;
 216         u32 iv32;
 217         u16 iv16;
 218         int err = -ENOENT;
 219
 220         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 221
 222         rcu_read_lock();
 223
 224         if (mac_addr) {
 225                 sta = sta_info_get(sdata->local, mac_addr);
 226                 if (!sta)
 227                         goto out;
 228
 229                 key = sta->key;
 230         } else
 231                 key = sdata->keys[key_idx];
 232
 233         if (!key)
 234                 goto out;
 235
 236         memset(&params, 0, sizeof(params));
 237
 238         switch (key->conf.alg) {
 239         case ALG_TKIP:
 240                 params.cipher = WLAN_CIPHER_SUITE_TKIP;
 241
 242                 iv32 = key->u.tkip.tx.iv32;
 243                 iv16 = key->u.tkip.tx.iv16;
 244
 245                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 246                     sdata->local->ops->get_tkip_seq)
 247                         sdata->local->ops->get_tkip_seq(
 248                                 local_to_hw(sdata->local),
 249                                 key->conf.hw_key_idx,
 250                                 &iv32, &iv16);
 251
 252                 seq[0] = iv16 & 0xff;
 253                 seq[1] = (iv16 >> 8) & 0xff;
 254                 seq[2] = iv32 & 0xff;
 255                 seq[3] = (iv32 >> 8) & 0xff;
 256                 seq[4] = (iv32 >> 16) & 0xff;
 257                 seq[5] = (iv32 >> 24) & 0xff;
 258                 params.seq = seq;
 259                 params.seq_len = 6;
 260                 break;
 261         case ALG_CCMP:
 262                 params.cipher = WLAN_CIPHER_SUITE_CCMP;
 263                 seq[0] = key->u.ccmp.tx_pn[5];
 264                 seq[1] = key->u.ccmp.tx_pn[4];
 265                 seq[2] = key->u.ccmp.tx_pn[3];
 266                 seq[3] = key->u.ccmp.tx_pn[2];
 267                 seq[4] = key->u.ccmp.tx_pn[1];
 268                 seq[5] = key->u.ccmp.tx_pn[0];
 269                 params.seq = seq;
 270                 params.seq_len = 6;
 271                 break;
 272         case ALG_WEP:
 273                 if (key->conf.keylen == 5)
 274                         params.cipher = WLAN_CIPHER_SUITE_WEP40;
 275                 else
 276                         params.cipher = WLAN_CIPHER_SUITE_WEP104;
 277                 break;
 278         }
 279
 280         params.key = key->conf.key;
 281         params.key_len = key->conf.keylen;
 282
 283         callback(cookie, &params);
 284         err = 0;
 285
 286  out:
 287         rcu_read_unlock();
 288         return err;
 289 }
 290
 291 static int ieee80211_config_default_key(struct wiphy *wiphy,
 292                                         struct net_device *dev,
 293                                         u8 key_idx)
 294 {
 295         struct ieee80211_sub_if_data *sdata;
 296
 297         rcu_read_lock();
 298
 299         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 300         ieee80211_set_default_key(sdata, key_idx);
 301
 302         rcu_read_unlock();
 303
 304         return 0;
 305 }
 306
 307 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 308 {
 309         struct ieee80211_sub_if_data *sdata = sta->sdata;
 310
 311         sinfo->filled = STATION_INFO_INACTIVE_TIME |
 312                         STATION_INFO_RX_BYTES |
 313                         STATION_INFO_TX_BYTES;
 314
 315         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 316         sinfo->rx_bytes = sta->rx_bytes;
 317         sinfo->tx_bytes = sta->tx_bytes;
 318
 319         if (ieee80211_vif_is_mesh(&sdata->vif)) {
 320 #ifdef CONFIG_MAC80211_MESH
 321                 sinfo->filled |= STATION_INFO_LLID |
 322                                  STATION_INFO_PLID |
 323                                  STATION_INFO_PLINK_STATE;
 324
 325                 sinfo->llid = le16_to_cpu(sta->llid);
 326                 sinfo->plid = le16_to_cpu(sta->plid);
 327                 sinfo->plink_state = sta->plink_state;
 328 #endif
 329         }
 330 }
 331
 332
 333 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 334                                  int idx, u8 *mac, struct station_info *sinfo)
 335 {
 336         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 337         struct sta_info *sta;
 338         int ret = -ENOENT;
 339
 340         rcu_read_lock();
 341
 342         sta = sta_info_get_by_idx(local, idx, dev);
 343         if (sta) {
 344                 ret = 0;
 345                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 346                 sta_set_sinfo(sta, sinfo);
 347         }
 348
 349         rcu_read_unlock();
 350
 351         return ret;
 352 }
 353
 354 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 355                                  u8 *mac, struct station_info *sinfo)
 356 {
 357         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 358         struct sta_info *sta;
 359         int ret = -ENOENT;
 360
 361         rcu_read_lock();
 362
 363         /* XXX: verify sta->dev == dev */
 364
 365         sta = sta_info_get(local, mac);
 366         if (sta) {
 367                 ret = 0;
 368                 sta_set_sinfo(sta, sinfo);
 369         }
 370
 371         rcu_read_unlock();
 372
 373         return ret;
 374 }
 375
 376 /*
 377  * This handles both adding a beacon and setting new beacon info
 378  */
 379 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 380                                    struct beacon_parameters *params)
 381 {
 382         struct beacon_data *new, *old;
 383         int new_head_len, new_tail_len;
 384         int size;
 385         int err = -EINVAL;
 386
 387         old = sdata->u.ap.beacon;
 388
 389         /* head must not be zero-length */
 390         if (params->head && !params->head_len)
 391                 return -EINVAL;
 392
 393         /*
 394          * This is a kludge. beacon interval should really be part
 395          * of the beacon information.
 396          */
 397         if (params->interval) {
 398                 sdata->local->hw.conf.beacon_int = params->interval;
 399                 err = ieee80211_hw_config(sdata->local,
 400                                         IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
 401                 if (err < 0)
 402                         return err;
 403                 /*
 404                  * We updated some parameter so if below bails out
 405                  * it's not an error.
 406                  */
 407                 err = 0;
 408         }
 409
 410         /* Need to have a beacon head if we don't have one yet */
 411         if (!params->head && !old)
 412                 return err;
 413
 414         /* sorry, no way to start beaconing without dtim period */
 415         if (!params->dtim_period && !old)
 416                 return err;
 417
 418         /* new or old head? */
 419         if (params->head)
 420                 new_head_len = params->head_len;
 421         else
 422                 new_head_len = old->head_len;
 423
 424         /* new or old tail? */
 425         if (params->tail || !old)
 426                 /* params->tail_len will be zero for !params->tail */
 427                 new_tail_len = params->tail_len;
 428         else
 429                 new_tail_len = old->tail_len;
 430
 431         size = sizeof(*new) + new_head_len + new_tail_len;
 432
 433         new = kzalloc(size, GFP_KERNEL);
 434         if (!new)
 435                 return -ENOMEM;
 436
 437         /* start filling the new info now */
 438
 439         /* new or old dtim period? */
 440         if (params->dtim_period)
 441                 new->dtim_period = params->dtim_period;
 442         else
 443                 new->dtim_period = old->dtim_period;
 444
 445         /*
 446          * pointers go into the block we allocated,
 447          * memory is | beacon_data | head | tail |
 448          */
 449         new->head = ((u8 *) new) + sizeof(*new);
 450         new->tail = new->head + new_head_len;
 451         new->head_len = new_head_len;
 452         new->tail_len = new_tail_len;
 453
 454         /* copy in head */
 455         if (params->head)
 456                 memcpy(new->head, params->head, new_head_len);
 457         else
 458                 memcpy(new->head, old->head, new_head_len);
 459
 460         /* copy in optional tail */
 461         if (params->tail)
 462                 memcpy(new->tail, params->tail, new_tail_len);
 463         else
 464                 if (old)
 465                         memcpy(new->tail, old->tail, new_tail_len);
 466
 467         rcu_assign_pointer(sdata->u.ap.beacon, new);
 468
 469         synchronize_rcu();
 470
 471         kfree(old);
 472
 473         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 474 }
 475
 476 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 477                                 struct beacon_parameters *params)
 478 {
 479         struct ieee80211_sub_if_data *sdata;
 480         struct beacon_data *old;
 481
 482         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 483
 484         if (sdata->vif.type != NL80211_IFTYPE_AP)
 485                 return -EINVAL;
 486
 487         old = sdata->u.ap.beacon;
 488
 489         if (old)
 490                 return -EALREADY;
 491
 492         return ieee80211_config_beacon(sdata, params);
 493 }
 494
 495 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 496                                 struct beacon_parameters *params)
 497 {
 498         struct ieee80211_sub_if_data *sdata;
 499         struct beacon_data *old;
 500
 501         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 502
 503         if (sdata->vif.type != NL80211_IFTYPE_AP)
 504                 return -EINVAL;
 505
 506         old = sdata->u.ap.beacon;
 507
 508         if (!old)
 509                 return -ENOENT;
 510
 511         return ieee80211_config_beacon(sdata, params);
 512 }
 513
 514 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 515 {
 516         struct ieee80211_sub_if_data *sdata;
 517         struct beacon_data *old;
 518
 519         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 520
 521         if (sdata->vif.type != NL80211_IFTYPE_AP)
 522                 return -EINVAL;
 523
 524         old = sdata->u.ap.beacon;
 525
 526         if (!old)
 527                 return -ENOENT;
 528
 529         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 530         synchronize_rcu();
 531         kfree(old);
 532
 533         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 534 }
 535
 536 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 537 struct iapp_layer2_update {
 538         u8 da[ETH_ALEN];        /* broadcast */
 539         u8 sa[ETH_ALEN];        /* STA addr */
 540         __be16 len;             /* 6 */
 541         u8 dsap;                /* 0 */
 542         u8 ssap;                /* 0 */
 543         u8 control;
 544         u8 xid_info[3];
 545 } __attribute__ ((packed));
 546
 547 static void ieee80211_send_layer2_update(struct sta_info *sta)
 548 {
 549         struct iapp_layer2_update *msg;
 550         struct sk_buff *skb;
 551
 552         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 553          * bridge devices */
 554
 555         skb = dev_alloc_skb(sizeof(*msg));
 556         if (!skb)
 557                 return;
 558         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 559
 560         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 561          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 562
 563         memset(msg->da, 0xff, ETH_ALEN);
 564         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 565         msg->len = htons(6);
 566         msg->dsap = 0;
 567         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 568         msg->control = 0xaf;    /* XID response lsb.1111F101.
 569                                  * F=0 (no poll command; unsolicited frame) */
 570         msg->xid_info[0] = 0x81;        /* XID format identifier */
 571         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 572         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 573
 574         skb->dev = sta->sdata->dev;
 575         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 576         memset(skb->cb, 0, sizeof(skb->cb));
 577         netif_rx(skb);
 578 }
 579
 580 static void sta_apply_parameters(struct ieee80211_local *local,
 581                                  struct sta_info *sta,
 582                                  struct station_parameters *params)
 583 {
 584         u32 rates;
 585         int i, j;
 586         struct ieee80211_supported_band *sband;
 587         struct ieee80211_sub_if_data *sdata = sta->sdata;
 588
 589         sband = local->hw.wiphy->bands[local->oper_channel->band];
 590
 591         /*
 592          * FIXME: updating the flags is racy when this function is
 593          *        called from ieee80211_change_station(), this will
 594          *        be resolved in a future patch.
 595          */
 596
 597         if (params->station_flags & STATION_FLAG_CHANGED) {
 598                 spin_lock_bh(&sta->lock);
 599                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 600                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 601                         sta->flags |= WLAN_STA_AUTHORIZED;
 602
 603                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 604                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 605                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 606
 607                 sta->flags &= ~WLAN_STA_WME;
 608                 if (params->station_flags & STATION_FLAG_WME)
 609                         sta->flags |= WLAN_STA_WME;
 610                 spin_unlock_bh(&sta->lock);
 611         }
 612
 613         /*
 614          * FIXME: updating the following information is racy when this
 615          *        function is called from ieee80211_change_station().
 616          *        However, all this information should be static so
 617          *        maybe we should just reject attemps to change it.
 618          */
 619
 620         if (params->aid) {
 621                 sta->sta.aid = params->aid;
 622                 if (sta->sta.aid > IEEE80211_MAX_AID)
 623                         sta->sta.aid = 0; /* XXX: should this be an error? */
 624         }
 625
 626         if (params->listen_interval >= 0)
 627                 sta->listen_interval = params->listen_interval;
 628
 629         if (params->supported_rates) {
 630                 rates = 0;
 631
 632                 for (i = 0; i < params->supported_rates_len; i++) {
 633                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 634                         for (j = 0; j < sband->n_bitrates; j++) {
 635                                 if (sband->bitrates[j].bitrate == rate)
 636                                         rates |= BIT(j);
 637                         }
 638                 }
 639                 sta->sta.supp_rates[local->oper_channel->band] = rates;
 640         }
 641
 642         if (params->ht_capa)
 643                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
 644                                                   params->ht_capa,
 645                                                   &sta->sta.ht_cap);
 646
 647         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 648                 switch (params->plink_action) {
 649                 case PLINK_ACTION_OPEN:
 650                         mesh_plink_open(sta);
 651                         break;
 652                 case PLINK_ACTION_BLOCK:
 653                         mesh_plink_block(sta);
 654                         break;
 655                 }
 656         }
 657 }
 658
 659 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 660                                  u8 *mac, struct station_parameters *params)
 661 {
 662         struct ieee80211_local *local = wiphy_priv(wiphy);
 663         struct sta_info *sta;
 664         struct ieee80211_sub_if_data *sdata;
 665         int err;
 666
 667         /* Prevent a race with changing the rate control algorithm */
 668         if (!netif_running(dev))
 669                 return -ENETDOWN;
 670
 671         if (params->vlan) {
 672                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 673
 674                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 675                     sdata->vif.type != NL80211_IFTYPE_AP)
 676                         return -EINVAL;
 677         } else
 678                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 679
 680         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 681                 return -EINVAL;
 682
 683         if (is_multicast_ether_addr(mac))
 684                 return -EINVAL;
 685
 686         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 687         if (!sta)
 688                 return -ENOMEM;
 689
 690         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 691
 692         sta_apply_parameters(local, sta, params);
 693
 694         rate_control_rate_init(sta);
 695
 696         rcu_read_lock();
 697
 698         err = sta_info_insert(sta);
 699         if (err) {
 700                 /* STA has been freed */
 701                 rcu_read_unlock();
 702                 return err;
 703         }
 704
 705         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 706             sdata->vif.type == NL80211_IFTYPE_AP)
 707                 ieee80211_send_layer2_update(sta);
 708
 709         rcu_read_unlock();
 710
 711         return 0;
 712 }
 713
 714 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 715                                  u8 *mac)
 716 {
 717         struct ieee80211_local *local = wiphy_priv(wiphy);
 718         struct ieee80211_sub_if_data *sdata;
 719         struct sta_info *sta;
 720
 721         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 722
 723         if (mac) {
 724                 rcu_read_lock();
 725
 726                 /* XXX: get sta belonging to dev */
 727                 sta = sta_info_get(local, mac);
 728                 if (!sta) {
 729                         rcu_read_unlock();
 730                         return -ENOENT;
 731                 }
 732
 733                 sta_info_unlink(&sta);
 734                 rcu_read_unlock();
 735
 736                 sta_info_destroy(sta);
 737         } else
 738                 sta_info_flush(local, sdata);
 739
 740         return 0;
 741 }
 742
 743 static int ieee80211_change_station(struct wiphy *wiphy,
 744                                     struct net_device *dev,
 745                                     u8 *mac,
 746                                     struct station_parameters *params)
 747 {
 748         struct ieee80211_local *local = wiphy_priv(wiphy);
 749         struct sta_info *sta;
 750         struct ieee80211_sub_if_data *vlansdata;
 751
 752         rcu_read_lock();
 753
 754         /* XXX: get sta belonging to dev */
 755         sta = sta_info_get(local, mac);
 756         if (!sta) {
 757                 rcu_read_unlock();
 758                 return -ENOENT;
 759         }
 760
 761         if (params->vlan && params->vlan != sta->sdata->dev) {
 762                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 763
 764                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 765                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
 766                         rcu_read_unlock();
 767                         return -EINVAL;
 768                 }
 769
 770                 sta->sdata = vlansdata;
 771                 ieee80211_send_layer2_update(sta);
 772         }
 773
 774         sta_apply_parameters(local, sta, params);
 775
 776         rcu_read_unlock();
 777
 778         return 0;
 779 }
 780
 781 #ifdef CONFIG_MAC80211_MESH
 782 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 783                                  u8 *dst, u8 *next_hop)
 784 {
 785         struct ieee80211_local *local = wiphy_priv(wiphy);
 786         struct ieee80211_sub_if_data *sdata;
 787         struct mesh_path *mpath;
 788         struct sta_info *sta;
 789         int err;
 790
 791         if (!netif_running(dev))
 792                 return -ENETDOWN;
 793
 794         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 795
 796         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 797                 return -ENOTSUPP;
 798
 799         rcu_read_lock();
 800         sta = sta_info_get(local, next_hop);
 801         if (!sta) {
 802                 rcu_read_unlock();
 803                 return -ENOENT;
 804         }
 805
 806         err = mesh_path_add(dst, sdata);
 807         if (err) {
 808                 rcu_read_unlock();
 809                 return err;
 810         }
 811
 812         mpath = mesh_path_lookup(dst, sdata);
 813         if (!mpath) {
 814                 rcu_read_unlock();
 815                 return -ENXIO;
 816         }
 817         mesh_path_fix_nexthop(mpath, sta);
 818
 819         rcu_read_unlock();
 820         return 0;
 821 }
 822
 823 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 824                                  u8 *dst)
 825 {
 826         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 827
 828         if (dst)
 829                 return mesh_path_del(dst, sdata);
 830
 831         mesh_path_flush(sdata);
 832         return 0;
 833 }
 834
 835 static int ieee80211_change_mpath(struct wiphy *wiphy,
 836                                     struct net_device *dev,
 837                                     u8 *dst, u8 *next_hop)
 838 {
 839         struct ieee80211_local *local = wiphy_priv(wiphy);
 840         struct ieee80211_sub_if_data *sdata;
 841         struct mesh_path *mpath;
 842         struct sta_info *sta;
 843
 844         if (!netif_running(dev))
 845                 return -ENETDOWN;
 846
 847         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 848
 849         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 850                 return -ENOTSUPP;
 851
 852         rcu_read_lock();
 853
 854         sta = sta_info_get(local, next_hop);
 855         if (!sta) {
 856                 rcu_read_unlock();
 857                 return -ENOENT;
 858         }
 859
 860         mpath = mesh_path_lookup(dst, sdata);
 861         if (!mpath) {
 862                 rcu_read_unlock();
 863                 return -ENOENT;
 864         }
 865
 866         mesh_path_fix_nexthop(mpath, sta);
 867
 868         rcu_read_unlock();
 869         return 0;
 870 }
 871
 872 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 873                             struct mpath_info *pinfo)
 874 {
 875         if (mpath->next_hop)
 876                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 877         else
 878                 memset(next_hop, 0, ETH_ALEN);
 879
 880         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 881                         MPATH_INFO_DSN |
 882                         MPATH_INFO_METRIC |
 883                         MPATH_INFO_EXPTIME |
 884                         MPATH_INFO_DISCOVERY_TIMEOUT |
 885                         MPATH_INFO_DISCOVERY_RETRIES |
 886                         MPATH_INFO_FLAGS;
 887
 888         pinfo->frame_qlen = mpath->frame_queue.qlen;
 889         pinfo->dsn = mpath->dsn;
 890         pinfo->metric = mpath->metric;
 891         if (time_before(jiffies, mpath->exp_time))
 892                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 893         pinfo->discovery_timeout =
 894                         jiffies_to_msecs(mpath->discovery_timeout);
 895         pinfo->discovery_retries = mpath->discovery_retries;
 896         pinfo->flags = 0;
 897         if (mpath->flags & MESH_PATH_ACTIVE)
 898                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 899         if (mpath->flags & MESH_PATH_RESOLVING)
 900                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 901         if (mpath->flags & MESH_PATH_DSN_VALID)
 902                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 903         if (mpath->flags & MESH_PATH_FIXED)
 904                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 905         if (mpath->flags & MESH_PATH_RESOLVING)
 906                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 907
 908         pinfo->flags = mpath->flags;
 909 }
 910
 911 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 912                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 913
 914 {
 915         struct ieee80211_sub_if_data *sdata;
 916         struct mesh_path *mpath;
 917
 918         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 919
 920         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 921                 return -ENOTSUPP;
 922
 923         rcu_read_lock();
 924         mpath = mesh_path_lookup(dst, sdata);
 925         if (!mpath) {
 926                 rcu_read_unlock();
 927                 return -ENOENT;
 928         }
 929         memcpy(dst, mpath->dst, ETH_ALEN);
 930         mpath_set_pinfo(mpath, next_hop, pinfo);
 931         rcu_read_unlock();
 932         return 0;
 933 }
 934
 935 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 936                                  int idx, u8 *dst, u8 *next_hop,
 937                                  struct mpath_info *pinfo)
 938 {
 939         struct ieee80211_sub_if_data *sdata;
 940         struct mesh_path *mpath;
 941
 942         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 943
 944         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 945                 return -ENOTSUPP;
 946
 947         rcu_read_lock();
 948         mpath = mesh_path_lookup_by_idx(idx, sdata);
 949         if (!mpath) {
 950                 rcu_read_unlock();
 951                 return -ENOENT;
 952         }
 953         memcpy(dst, mpath->dst, ETH_ALEN);
 954         mpath_set_pinfo(mpath, next_hop, pinfo);
 955         rcu_read_unlock();
 956         return 0;
 957 }
 958
 959 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
 960                                 struct net_device *dev,
 961                                 struct mesh_config *conf)
 962 {
 963         struct ieee80211_sub_if_data *sdata;
 964         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 965
 966         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 967                 return -ENOTSUPP;
 968         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
 969         return 0;
 970 }
 971
 972 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
 973 {
 974         return (mask >> (parm-1)) & 0x1;
 975 }
 976
 977 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
 978                                 struct net_device *dev,
 979                                 const struct mesh_config *nconf, u32 mask)
 980 {
 981         struct mesh_config *conf;
 982         struct ieee80211_sub_if_data *sdata;
 983         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 984
 985         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 986                 return -ENOTSUPP;
 987
 988         /* Set the config options which we are interested in setting */
 989         conf = &(sdata->u.mesh.mshcfg);
 990         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
 991                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
 992         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
 993                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
 994         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
 995                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
 996         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
 997                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
 998         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
 999                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1000         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1001                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1002         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1003                 conf->auto_open_plinks = nconf->auto_open_plinks;
1004         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1005                 conf->dot11MeshHWMPmaxPREQretries =
1006                         nconf->dot11MeshHWMPmaxPREQretries;
1007         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1008                 conf->path_refresh_time = nconf->path_refresh_time;
1009         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1010                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1011         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1012                 conf->dot11MeshHWMPactivePathTimeout =
1013                         nconf->dot11MeshHWMPactivePathTimeout;
1014         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1015                 conf->dot11MeshHWMPpreqMinInterval =
1016                         nconf->dot11MeshHWMPpreqMinInterval;
1017         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1018                            mask))
1019                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1020                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1021         return 0;
1022 }
1023
1024 #endif
1025
1026 static int ieee80211_change_bss(struct wiphy *wiphy,
1027                                 struct net_device *dev,
1028                                 struct bss_parameters *params)
1029 {
1030         struct ieee80211_sub_if_data *sdata;
1031         u32 changed = 0;
1032
1033         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1034
1035         if (sdata->vif.type != NL80211_IFTYPE_AP)
1036                 return -EINVAL;
1037
1038         if (params->use_cts_prot >= 0) {
1039                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1040                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1041         }
1042         if (params->use_short_preamble >= 0) {
1043                 sdata->vif.bss_conf.use_short_preamble =
1044                         params->use_short_preamble;
1045                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1046         }
1047         if (params->use_short_slot_time >= 0) {
1048                 sdata->vif.bss_conf.use_short_slot =
1049                         params->use_short_slot_time;
1050                 changed |= BSS_CHANGED_ERP_SLOT;
1051         }
1052
1053         if (params->basic_rates) {
1054                 int i, j;
1055                 u32 rates = 0;
1056                 struct ieee80211_local *local = wiphy_priv(wiphy);
1057                 struct ieee80211_supported_band *sband =
1058                         wiphy->bands[local->oper_channel->band];
1059
1060                 for (i = 0; i < params->basic_rates_len; i++) {
1061                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1062                         for (j = 0; j < sband->n_bitrates; j++) {
1063                                 if (sband->bitrates[j].bitrate == rate)
1064                                         rates |= BIT(j);
1065                         }
1066                 }
1067                 sdata->vif.bss_conf.basic_rates = rates;
1068                 changed |= BSS_CHANGED_BASIC_RATES;
1069         }
1070
1071         ieee80211_bss_info_change_notify(sdata, changed);
1072
1073         return 0;
1074 }
1075
1076 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1077                                     struct ieee80211_txq_params *params)
1078 {
1079         struct ieee80211_local *local = wiphy_priv(wiphy);
1080         struct ieee80211_tx_queue_params p;
1081
1082         if (!local->ops->conf_tx)
1083                 return -EOPNOTSUPP;
1084
1085         memset(&p, 0, sizeof(p));
1086         p.aifs = params->aifs;
1087         p.cw_max = params->cwmax;
1088         p.cw_min = params->cwmin;
1089         p.txop = params->txop;
1090         if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1091                 printk(KERN_DEBUG "%s: failed to set TX queue "
1092                        "parameters for queue %d\n", local->mdev->name,
1093                        params->queue);
1094                 return -EINVAL;
1095         }
1096
1097         return 0;
1098 }
1099
1100 static int ieee80211_set_channel(struct wiphy *wiphy,
1101                                  struct ieee80211_channel *chan,
1102                                  enum nl80211_sec_chan_offset sec_chan_offset)
1103 {
1104         struct ieee80211_local *local = wiphy_priv(wiphy);
1105
1106         local->oper_channel = chan;
1107         local->oper_sec_chan_offset = sec_chan_offset;
1108
1109         return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1110 }
1111
1112 struct cfg80211_ops mac80211_config_ops = {
1113         .add_virtual_intf = ieee80211_add_iface,
1114         .del_virtual_intf = ieee80211_del_iface,
1115         .change_virtual_intf = ieee80211_change_iface,
1116         .add_key = ieee80211_add_key,
1117         .del_key = ieee80211_del_key,
1118         .get_key = ieee80211_get_key,
1119         .set_default_key = ieee80211_config_default_key,
1120         .add_beacon = ieee80211_add_beacon,
1121         .set_beacon = ieee80211_set_beacon,
1122         .del_beacon = ieee80211_del_beacon,
1123         .add_station = ieee80211_add_station,
1124         .del_station = ieee80211_del_station,
1125         .change_station = ieee80211_change_station,
1126         .get_station = ieee80211_get_station,
1127         .dump_station = ieee80211_dump_station,
1128 #ifdef CONFIG_MAC80211_MESH
1129         .add_mpath = ieee80211_add_mpath,
1130         .del_mpath = ieee80211_del_mpath,
1131         .change_mpath = ieee80211_change_mpath,
1132         .get_mpath = ieee80211_get_mpath,
1133         .dump_mpath = ieee80211_dump_mpath,
1134         .set_mesh_params = ieee80211_set_mesh_params,
1135         .get_mesh_params = ieee80211_get_mesh_params,
1136 #endif
1137         .change_bss = ieee80211_change_bss,
1138         .set_txq_params = ieee80211_set_txq_params,
1139         .set_channel = ieee80211_set_channel,
1140 };