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                 ieee80211_hw_config(sdata->local,
 400                                     IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
 401                 /*
 402                  * We updated some parameter so if below bails out
 403                  * it's not an error.
 404                  */
 405                 err = 0;
 406         }
 407
 408         /* Need to have a beacon head if we don't have one yet */
 409         if (!params->head && !old)
 410                 return err;
 411
 412         /* sorry, no way to start beaconing without dtim period */
 413         if (!params->dtim_period && !old)
 414                 return err;
 415
 416         /* new or old head? */
 417         if (params->head)
 418                 new_head_len = params->head_len;
 419         else
 420                 new_head_len = old->head_len;
 421
 422         /* new or old tail? */
 423         if (params->tail || !old)
 424                 /* params->tail_len will be zero for !params->tail */
 425                 new_tail_len = params->tail_len;
 426         else
 427                 new_tail_len = old->tail_len;
 428
 429         size = sizeof(*new) + new_head_len + new_tail_len;
 430
 431         new = kzalloc(size, GFP_KERNEL);
 432         if (!new)
 433                 return -ENOMEM;
 434
 435         /* start filling the new info now */
 436
 437         /* new or old dtim period? */
 438         if (params->dtim_period)
 439                 new->dtim_period = params->dtim_period;
 440         else
 441                 new->dtim_period = old->dtim_period;
 442
 443         /*
 444          * pointers go into the block we allocated,
 445          * memory is | beacon_data | head | tail |
 446          */
 447         new->head = ((u8 *) new) + sizeof(*new);
 448         new->tail = new->head + new_head_len;
 449         new->head_len = new_head_len;
 450         new->tail_len = new_tail_len;
 451
 452         /* copy in head */
 453         if (params->head)
 454                 memcpy(new->head, params->head, new_head_len);
 455         else
 456                 memcpy(new->head, old->head, new_head_len);
 457
 458         /* copy in optional tail */
 459         if (params->tail)
 460                 memcpy(new->tail, params->tail, new_tail_len);
 461         else
 462                 if (old)
 463                         memcpy(new->tail, old->tail, new_tail_len);
 464
 465         rcu_assign_pointer(sdata->u.ap.beacon, new);
 466
 467         synchronize_rcu();
 468
 469         kfree(old);
 470
 471         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 472 }
 473
 474 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 475                                 struct beacon_parameters *params)
 476 {
 477         struct ieee80211_sub_if_data *sdata;
 478         struct beacon_data *old;
 479
 480         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 481
 482         if (sdata->vif.type != NL80211_IFTYPE_AP)
 483                 return -EINVAL;
 484
 485         old = sdata->u.ap.beacon;
 486
 487         if (old)
 488                 return -EALREADY;
 489
 490         return ieee80211_config_beacon(sdata, params);
 491 }
 492
 493 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 494                                 struct beacon_parameters *params)
 495 {
 496         struct ieee80211_sub_if_data *sdata;
 497         struct beacon_data *old;
 498
 499         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 500
 501         if (sdata->vif.type != NL80211_IFTYPE_AP)
 502                 return -EINVAL;
 503
 504         old = sdata->u.ap.beacon;
 505
 506         if (!old)
 507                 return -ENOENT;
 508
 509         return ieee80211_config_beacon(sdata, params);
 510 }
 511
 512 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 513 {
 514         struct ieee80211_sub_if_data *sdata;
 515         struct beacon_data *old;
 516
 517         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 518
 519         if (sdata->vif.type != NL80211_IFTYPE_AP)
 520                 return -EINVAL;
 521
 522         old = sdata->u.ap.beacon;
 523
 524         if (!old)
 525                 return -ENOENT;
 526
 527         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 528         synchronize_rcu();
 529         kfree(old);
 530
 531         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 532 }
 533
 534 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 535 struct iapp_layer2_update {
 536         u8 da[ETH_ALEN];        /* broadcast */
 537         u8 sa[ETH_ALEN];        /* STA addr */
 538         __be16 len;             /* 6 */
 539         u8 dsap;                /* 0 */
 540         u8 ssap;                /* 0 */
 541         u8 control;
 542         u8 xid_info[3];
 543 } __attribute__ ((packed));
 544
 545 static void ieee80211_send_layer2_update(struct sta_info *sta)
 546 {
 547         struct iapp_layer2_update *msg;
 548         struct sk_buff *skb;
 549
 550         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 551          * bridge devices */
 552
 553         skb = dev_alloc_skb(sizeof(*msg));
 554         if (!skb)
 555                 return;
 556         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 557
 558         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 559          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 560
 561         memset(msg->da, 0xff, ETH_ALEN);
 562         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 563         msg->len = htons(6);
 564         msg->dsap = 0;
 565         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 566         msg->control = 0xaf;    /* XID response lsb.1111F101.
 567                                  * F=0 (no poll command; unsolicited frame) */
 568         msg->xid_info[0] = 0x81;        /* XID format identifier */
 569         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 570         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 571
 572         skb->dev = sta->sdata->dev;
 573         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 574         memset(skb->cb, 0, sizeof(skb->cb));
 575         netif_rx(skb);
 576 }
 577
 578 static void sta_apply_parameters(struct ieee80211_local *local,
 579                                  struct sta_info *sta,
 580                                  struct station_parameters *params)
 581 {
 582         u32 rates;
 583         int i, j;
 584         struct ieee80211_supported_band *sband;
 585         struct ieee80211_sub_if_data *sdata = sta->sdata;
 586
 587         sband = local->hw.wiphy->bands[local->oper_channel->band];
 588
 589         /*
 590          * FIXME: updating the flags is racy when this function is
 591          *        called from ieee80211_change_station(), this will
 592          *        be resolved in a future patch.
 593          */
 594
 595         if (params->station_flags & STATION_FLAG_CHANGED) {
 596                 spin_lock_bh(&sta->lock);
 597                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 598                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 599                         sta->flags |= WLAN_STA_AUTHORIZED;
 600
 601                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 602                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 603                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 604
 605                 sta->flags &= ~WLAN_STA_WME;
 606                 if (params->station_flags & STATION_FLAG_WME)
 607                         sta->flags |= WLAN_STA_WME;
 608                 spin_unlock_bh(&sta->lock);
 609         }
 610
 611         /*
 612          * FIXME: updating the following information is racy when this
 613          *        function is called from ieee80211_change_station().
 614          *        However, all this information should be static so
 615          *        maybe we should just reject attemps to change it.
 616          */
 617
 618         if (params->aid) {
 619                 sta->sta.aid = params->aid;
 620                 if (sta->sta.aid > IEEE80211_MAX_AID)
 621                         sta->sta.aid = 0; /* XXX: should this be an error? */
 622         }
 623
 624         if (params->listen_interval >= 0)
 625                 sta->listen_interval = params->listen_interval;
 626
 627         if (params->supported_rates) {
 628                 rates = 0;
 629
 630                 for (i = 0; i < params->supported_rates_len; i++) {
 631                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 632                         for (j = 0; j < sband->n_bitrates; j++) {
 633                                 if (sband->bitrates[j].bitrate == rate)
 634                                         rates |= BIT(j);
 635                         }
 636                 }
 637                 sta->sta.supp_rates[local->oper_channel->band] = rates;
 638         }
 639
 640         if (params->ht_capa)
 641                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
 642                                                   params->ht_capa,
 643                                                   &sta->sta.ht_cap);
 644
 645         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 646                 switch (params->plink_action) {
 647                 case PLINK_ACTION_OPEN:
 648                         mesh_plink_open(sta);
 649                         break;
 650                 case PLINK_ACTION_BLOCK:
 651                         mesh_plink_block(sta);
 652                         break;
 653                 }
 654         }
 655 }
 656
 657 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 658                                  u8 *mac, struct station_parameters *params)
 659 {
 660         struct ieee80211_local *local = wiphy_priv(wiphy);
 661         struct sta_info *sta;
 662         struct ieee80211_sub_if_data *sdata;
 663         int err;
 664
 665         /* Prevent a race with changing the rate control algorithm */
 666         if (!netif_running(dev))
 667                 return -ENETDOWN;
 668
 669         if (params->vlan) {
 670                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 671
 672                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 673                     sdata->vif.type != NL80211_IFTYPE_AP)
 674                         return -EINVAL;
 675         } else
 676                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 677
 678         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 679                 return -EINVAL;
 680
 681         if (is_multicast_ether_addr(mac))
 682                 return -EINVAL;
 683
 684         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 685         if (!sta)
 686                 return -ENOMEM;
 687
 688         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 689
 690         sta_apply_parameters(local, sta, params);
 691
 692         rate_control_rate_init(sta);
 693
 694         rcu_read_lock();
 695
 696         err = sta_info_insert(sta);
 697         if (err) {
 698                 /* STA has been freed */
 699                 rcu_read_unlock();
 700                 return err;
 701         }
 702
 703         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 704             sdata->vif.type == NL80211_IFTYPE_AP)
 705                 ieee80211_send_layer2_update(sta);
 706
 707         rcu_read_unlock();
 708
 709         return 0;
 710 }
 711
 712 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 713                                  u8 *mac)
 714 {
 715         struct ieee80211_local *local = wiphy_priv(wiphy);
 716         struct ieee80211_sub_if_data *sdata;
 717         struct sta_info *sta;
 718
 719         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 720
 721         if (mac) {
 722                 rcu_read_lock();
 723
 724                 /* XXX: get sta belonging to dev */
 725                 sta = sta_info_get(local, mac);
 726                 if (!sta) {
 727                         rcu_read_unlock();
 728                         return -ENOENT;
 729                 }
 730
 731                 sta_info_unlink(&sta);
 732                 rcu_read_unlock();
 733
 734                 sta_info_destroy(sta);
 735         } else
 736                 sta_info_flush(local, sdata);
 737
 738         return 0;
 739 }
 740
 741 static int ieee80211_change_station(struct wiphy *wiphy,
 742                                     struct net_device *dev,
 743                                     u8 *mac,
 744                                     struct station_parameters *params)
 745 {
 746         struct ieee80211_local *local = wiphy_priv(wiphy);
 747         struct sta_info *sta;
 748         struct ieee80211_sub_if_data *vlansdata;
 749
 750         rcu_read_lock();
 751
 752         /* XXX: get sta belonging to dev */
 753         sta = sta_info_get(local, mac);
 754         if (!sta) {
 755                 rcu_read_unlock();
 756                 return -ENOENT;
 757         }
 758
 759         if (params->vlan && params->vlan != sta->sdata->dev) {
 760                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 761
 762                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 763                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
 764                         rcu_read_unlock();
 765                         return -EINVAL;
 766                 }
 767
 768                 sta->sdata = vlansdata;
 769                 ieee80211_send_layer2_update(sta);
 770         }
 771
 772         sta_apply_parameters(local, sta, params);
 773
 774         rcu_read_unlock();
 775
 776         return 0;
 777 }
 778
 779 #ifdef CONFIG_MAC80211_MESH
 780 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 781                                  u8 *dst, u8 *next_hop)
 782 {
 783         struct ieee80211_local *local = wiphy_priv(wiphy);
 784         struct ieee80211_sub_if_data *sdata;
 785         struct mesh_path *mpath;
 786         struct sta_info *sta;
 787         int err;
 788
 789         if (!netif_running(dev))
 790                 return -ENETDOWN;
 791
 792         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 793
 794         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 795                 return -ENOTSUPP;
 796
 797         rcu_read_lock();
 798         sta = sta_info_get(local, next_hop);
 799         if (!sta) {
 800                 rcu_read_unlock();
 801                 return -ENOENT;
 802         }
 803
 804         err = mesh_path_add(dst, sdata);
 805         if (err) {
 806                 rcu_read_unlock();
 807                 return err;
 808         }
 809
 810         mpath = mesh_path_lookup(dst, sdata);
 811         if (!mpath) {
 812                 rcu_read_unlock();
 813                 return -ENXIO;
 814         }
 815         mesh_path_fix_nexthop(mpath, sta);
 816
 817         rcu_read_unlock();
 818         return 0;
 819 }
 820
 821 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 822                                  u8 *dst)
 823 {
 824         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 825
 826         if (dst)
 827                 return mesh_path_del(dst, sdata);
 828
 829         mesh_path_flush(sdata);
 830         return 0;
 831 }
 832
 833 static int ieee80211_change_mpath(struct wiphy *wiphy,
 834                                     struct net_device *dev,
 835                                     u8 *dst, u8 *next_hop)
 836 {
 837         struct ieee80211_local *local = wiphy_priv(wiphy);
 838         struct ieee80211_sub_if_data *sdata;
 839         struct mesh_path *mpath;
 840         struct sta_info *sta;
 841
 842         if (!netif_running(dev))
 843                 return -ENETDOWN;
 844
 845         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 846
 847         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 848                 return -ENOTSUPP;
 849
 850         rcu_read_lock();
 851
 852         sta = sta_info_get(local, next_hop);
 853         if (!sta) {
 854                 rcu_read_unlock();
 855                 return -ENOENT;
 856         }
 857
 858         mpath = mesh_path_lookup(dst, sdata);
 859         if (!mpath) {
 860                 rcu_read_unlock();
 861                 return -ENOENT;
 862         }
 863
 864         mesh_path_fix_nexthop(mpath, sta);
 865
 866         rcu_read_unlock();
 867         return 0;
 868 }
 869
 870 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 871                             struct mpath_info *pinfo)
 872 {
 873         if (mpath->next_hop)
 874                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 875         else
 876                 memset(next_hop, 0, ETH_ALEN);
 877
 878         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 879                         MPATH_INFO_DSN |
 880                         MPATH_INFO_METRIC |
 881                         MPATH_INFO_EXPTIME |
 882                         MPATH_INFO_DISCOVERY_TIMEOUT |
 883                         MPATH_INFO_DISCOVERY_RETRIES |
 884                         MPATH_INFO_FLAGS;
 885
 886         pinfo->frame_qlen = mpath->frame_queue.qlen;
 887         pinfo->dsn = mpath->dsn;
 888         pinfo->metric = mpath->metric;
 889         if (time_before(jiffies, mpath->exp_time))
 890                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 891         pinfo->discovery_timeout =
 892                         jiffies_to_msecs(mpath->discovery_timeout);
 893         pinfo->discovery_retries = mpath->discovery_retries;
 894         pinfo->flags = 0;
 895         if (mpath->flags & MESH_PATH_ACTIVE)
 896                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 897         if (mpath->flags & MESH_PATH_RESOLVING)
 898                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 899         if (mpath->flags & MESH_PATH_DSN_VALID)
 900                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 901         if (mpath->flags & MESH_PATH_FIXED)
 902                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 903         if (mpath->flags & MESH_PATH_RESOLVING)
 904                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 905
 906         pinfo->flags = mpath->flags;
 907 }
 908
 909 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 910                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 911
 912 {
 913         struct ieee80211_sub_if_data *sdata;
 914         struct mesh_path *mpath;
 915
 916         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 917
 918         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 919                 return -ENOTSUPP;
 920
 921         rcu_read_lock();
 922         mpath = mesh_path_lookup(dst, sdata);
 923         if (!mpath) {
 924                 rcu_read_unlock();
 925                 return -ENOENT;
 926         }
 927         memcpy(dst, mpath->dst, ETH_ALEN);
 928         mpath_set_pinfo(mpath, next_hop, pinfo);
 929         rcu_read_unlock();
 930         return 0;
 931 }
 932
 933 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 934                                  int idx, u8 *dst, u8 *next_hop,
 935                                  struct mpath_info *pinfo)
 936 {
 937         struct ieee80211_sub_if_data *sdata;
 938         struct mesh_path *mpath;
 939
 940         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 941
 942         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 943                 return -ENOTSUPP;
 944
 945         rcu_read_lock();
 946         mpath = mesh_path_lookup_by_idx(idx, sdata);
 947         if (!mpath) {
 948                 rcu_read_unlock();
 949                 return -ENOENT;
 950         }
 951         memcpy(dst, mpath->dst, ETH_ALEN);
 952         mpath_set_pinfo(mpath, next_hop, pinfo);
 953         rcu_read_unlock();
 954         return 0;
 955 }
 956
 957 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
 958                                 struct net_device *dev,
 959                                 struct mesh_config *conf)
 960 {
 961         struct ieee80211_sub_if_data *sdata;
 962         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 963
 964         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 965                 return -ENOTSUPP;
 966         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
 967         return 0;
 968 }
 969
 970 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
 971 {
 972         return (mask >> (parm-1)) & 0x1;
 973 }
 974
 975 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
 976                                 struct net_device *dev,
 977                                 const struct mesh_config *nconf, u32 mask)
 978 {
 979         struct mesh_config *conf;
 980         struct ieee80211_sub_if_data *sdata;
 981         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 982
 983         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 984                 return -ENOTSUPP;
 985
 986         /* Set the config options which we are interested in setting */
 987         conf = &(sdata->u.mesh.mshcfg);
 988         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
 989                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
 990         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
 991                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
 992         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
 993                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
 994         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
 995                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
 996         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
 997                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
 998         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
 999                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1000         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1001                 conf->auto_open_plinks = nconf->auto_open_plinks;
1002         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1003                 conf->dot11MeshHWMPmaxPREQretries =
1004                         nconf->dot11MeshHWMPmaxPREQretries;
1005         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1006                 conf->path_refresh_time = nconf->path_refresh_time;
1007         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1008                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1009         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1010                 conf->dot11MeshHWMPactivePathTimeout =
1011                         nconf->dot11MeshHWMPactivePathTimeout;
1012         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1013                 conf->dot11MeshHWMPpreqMinInterval =
1014                         nconf->dot11MeshHWMPpreqMinInterval;
1015         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1016                            mask))
1017                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1018                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1019         return 0;
1020 }
1021
1022 #endif
1023
1024 static int ieee80211_change_bss(struct wiphy *wiphy,
1025                                 struct net_device *dev,
1026                                 struct bss_parameters *params)
1027 {
1028         struct ieee80211_sub_if_data *sdata;
1029         u32 changed = 0;
1030
1031         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032
1033         if (sdata->vif.type != NL80211_IFTYPE_AP)
1034                 return -EINVAL;
1035
1036         if (params->use_cts_prot >= 0) {
1037                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1038                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1039         }
1040         if (params->use_short_preamble >= 0) {
1041                 sdata->vif.bss_conf.use_short_preamble =
1042                         params->use_short_preamble;
1043                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1044         }
1045         if (params->use_short_slot_time >= 0) {
1046                 sdata->vif.bss_conf.use_short_slot =
1047                         params->use_short_slot_time;
1048                 changed |= BSS_CHANGED_ERP_SLOT;
1049         }
1050
1051         if (params->basic_rates) {
1052                 int i, j;
1053                 u32 rates = 0;
1054                 struct ieee80211_local *local = wiphy_priv(wiphy);
1055                 struct ieee80211_supported_band *sband =
1056                         wiphy->bands[local->oper_channel->band];
1057
1058                 for (i = 0; i < params->basic_rates_len; i++) {
1059                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1060                         for (j = 0; j < sband->n_bitrates; j++) {
1061                                 if (sband->bitrates[j].bitrate == rate)
1062                                         rates |= BIT(j);
1063                         }
1064                 }
1065                 sdata->vif.bss_conf.basic_rates = rates;
1066                 changed |= BSS_CHANGED_BASIC_RATES;
1067         }
1068
1069         ieee80211_bss_info_change_notify(sdata, changed);
1070
1071         return 0;
1072 }
1073
1074 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1075                                     struct ieee80211_txq_params *params)
1076 {
1077         struct ieee80211_local *local = wiphy_priv(wiphy);
1078         struct ieee80211_tx_queue_params p;
1079
1080         if (!local->ops->conf_tx)
1081                 return -EOPNOTSUPP;
1082
1083         memset(&p, 0, sizeof(p));
1084         p.aifs = params->aifs;
1085         p.cw_max = params->cwmax;
1086         p.cw_min = params->cwmin;
1087         p.txop = params->txop;
1088         if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1089                 printk(KERN_DEBUG "%s: failed to set TX queue "
1090                        "parameters for queue %d\n", local->mdev->name,
1091                        params->queue);
1092                 return -EINVAL;
1093         }
1094
1095         return 0;
1096 }
1097
1098 static int ieee80211_set_channel(struct wiphy *wiphy,
1099                                  struct ieee80211_channel *chan,
1100                                  enum nl80211_sec_chan_offset sec_chan_offset)
1101 {
1102         struct ieee80211_local *local = wiphy_priv(wiphy);
1103
1104         local->oper_channel = chan;
1105         local->oper_sec_chan_offset = sec_chan_offset;
1106
1107         return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1108 }
1109
1110 struct cfg80211_ops mac80211_config_ops = {
1111         .add_virtual_intf = ieee80211_add_iface,
1112         .del_virtual_intf = ieee80211_del_iface,
1113         .change_virtual_intf = ieee80211_change_iface,
1114         .add_key = ieee80211_add_key,
1115         .del_key = ieee80211_del_key,
1116         .get_key = ieee80211_get_key,
1117         .set_default_key = ieee80211_config_default_key,
1118         .add_beacon = ieee80211_add_beacon,
1119         .set_beacon = ieee80211_set_beacon,
1120         .del_beacon = ieee80211_del_beacon,
1121         .add_station = ieee80211_add_station,
1122         .del_station = ieee80211_del_station,
1123         .change_station = ieee80211_change_station,
1124         .get_station = ieee80211_get_station,
1125         .dump_station = ieee80211_dump_station,
1126 #ifdef CONFIG_MAC80211_MESH
1127         .add_mpath = ieee80211_add_mpath,
1128         .del_mpath = ieee80211_del_mpath,
1129         .change_mpath = ieee80211_change_mpath,
1130         .get_mpath = ieee80211_get_mpath,
1131         .dump_mpath = ieee80211_dump_mpath,
1132         .set_mesh_params = ieee80211_set_mesh_params,
1133         .get_mesh_params = ieee80211_get_mesh_params,
1134 #endif
1135         .change_bss = ieee80211_change_bss,
1136         .set_txq_params = ieee80211_set_txq_params,
1137         .set_channel = ieee80211_set_channel,
1138 };