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                         STATION_INFO_TX_BITRATE;
 315
 316         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 317         sinfo->rx_bytes = sta->rx_bytes;
 318         sinfo->tx_bytes = sta->tx_bytes;
 319
 320         if (sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
 321                 sinfo->filled |= STATION_INFO_SIGNAL;
 322                 sinfo->signal = (s8)sta->last_signal;
 323         }
 324
 325         sinfo->txrate.flags = 0;
 326         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
 327                 sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
 328         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 329                 sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
 330         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
 331                 sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
 332
 333         if (!(sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)) {
 334                 struct ieee80211_supported_band *sband;
 335                 sband = sta->local->hw.wiphy->bands[
 336                                 sta->local->hw.conf.channel->band];
 337                 sinfo->txrate.legacy =
 338                         sband->bitrates[sta->last_tx_rate.idx].bitrate;
 339         } else
 340                 sinfo->txrate.mcs = sta->last_tx_rate.idx;
 341
 342         if (ieee80211_vif_is_mesh(&sdata->vif)) {
 343 #ifdef CONFIG_MAC80211_MESH
 344                 sinfo->filled |= STATION_INFO_LLID |
 345                                  STATION_INFO_PLID |
 346                                  STATION_INFO_PLINK_STATE;
 347
 348                 sinfo->llid = le16_to_cpu(sta->llid);
 349                 sinfo->plid = le16_to_cpu(sta->plid);
 350                 sinfo->plink_state = sta->plink_state;
 351 #endif
 352         }
 353 }
 354
 355
 356 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 357                                  int idx, u8 *mac, struct station_info *sinfo)
 358 {
 359         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 360         struct sta_info *sta;
 361         int ret = -ENOENT;
 362
 363         rcu_read_lock();
 364
 365         sta = sta_info_get_by_idx(local, idx, dev);
 366         if (sta) {
 367                 ret = 0;
 368                 memcpy(mac, sta->sta.addr, ETH_ALEN);
 369                 sta_set_sinfo(sta, sinfo);
 370         }
 371
 372         rcu_read_unlock();
 373
 374         return ret;
 375 }
 376
 377 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 378                                  u8 *mac, struct station_info *sinfo)
 379 {
 380         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 381         struct sta_info *sta;
 382         int ret = -ENOENT;
 383
 384         rcu_read_lock();
 385
 386         /* XXX: verify sta->dev == dev */
 387
 388         sta = sta_info_get(local, mac);
 389         if (sta) {
 390                 ret = 0;
 391                 sta_set_sinfo(sta, sinfo);
 392         }
 393
 394         rcu_read_unlock();
 395
 396         return ret;
 397 }
 398
 399 /*
 400  * This handles both adding a beacon and setting new beacon info
 401  */
 402 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 403                                    struct beacon_parameters *params)
 404 {
 405         struct beacon_data *new, *old;
 406         int new_head_len, new_tail_len;
 407         int size;
 408         int err = -EINVAL;
 409
 410         old = sdata->u.ap.beacon;
 411
 412         /* head must not be zero-length */
 413         if (params->head && !params->head_len)
 414                 return -EINVAL;
 415
 416         /*
 417          * This is a kludge. beacon interval should really be part
 418          * of the beacon information.
 419          */
 420         if (params->interval) {
 421                 sdata->local->hw.conf.beacon_int = params->interval;
 422                 err = ieee80211_hw_config(sdata->local,
 423                                         IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
 424                 if (err < 0)
 425                         return err;
 426                 /*
 427                  * We updated some parameter so if below bails out
 428                  * it's not an error.
 429                  */
 430                 err = 0;
 431         }
 432
 433         /* Need to have a beacon head if we don't have one yet */
 434         if (!params->head && !old)
 435                 return err;
 436
 437         /* sorry, no way to start beaconing without dtim period */
 438         if (!params->dtim_period && !old)
 439                 return err;
 440
 441         /* new or old head? */
 442         if (params->head)
 443                 new_head_len = params->head_len;
 444         else
 445                 new_head_len = old->head_len;
 446
 447         /* new or old tail? */
 448         if (params->tail || !old)
 449                 /* params->tail_len will be zero for !params->tail */
 450                 new_tail_len = params->tail_len;
 451         else
 452                 new_tail_len = old->tail_len;
 453
 454         size = sizeof(*new) + new_head_len + new_tail_len;
 455
 456         new = kzalloc(size, GFP_KERNEL);
 457         if (!new)
 458                 return -ENOMEM;
 459
 460         /* start filling the new info now */
 461
 462         /* new or old dtim period? */
 463         if (params->dtim_period)
 464                 new->dtim_period = params->dtim_period;
 465         else
 466                 new->dtim_period = old->dtim_period;
 467
 468         /*
 469          * pointers go into the block we allocated,
 470          * memory is | beacon_data | head | tail |
 471          */
 472         new->head = ((u8 *) new) + sizeof(*new);
 473         new->tail = new->head + new_head_len;
 474         new->head_len = new_head_len;
 475         new->tail_len = new_tail_len;
 476
 477         /* copy in head */
 478         if (params->head)
 479                 memcpy(new->head, params->head, new_head_len);
 480         else
 481                 memcpy(new->head, old->head, new_head_len);
 482
 483         /* copy in optional tail */
 484         if (params->tail)
 485                 memcpy(new->tail, params->tail, new_tail_len);
 486         else
 487                 if (old)
 488                         memcpy(new->tail, old->tail, new_tail_len);
 489
 490         rcu_assign_pointer(sdata->u.ap.beacon, new);
 491
 492         synchronize_rcu();
 493
 494         kfree(old);
 495
 496         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 497 }
 498
 499 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 500                                 struct beacon_parameters *params)
 501 {
 502         struct ieee80211_sub_if_data *sdata;
 503         struct beacon_data *old;
 504
 505         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 506
 507         if (sdata->vif.type != NL80211_IFTYPE_AP)
 508                 return -EINVAL;
 509
 510         old = sdata->u.ap.beacon;
 511
 512         if (old)
 513                 return -EALREADY;
 514
 515         return ieee80211_config_beacon(sdata, params);
 516 }
 517
 518 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 519                                 struct beacon_parameters *params)
 520 {
 521         struct ieee80211_sub_if_data *sdata;
 522         struct beacon_data *old;
 523
 524         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 525
 526         if (sdata->vif.type != NL80211_IFTYPE_AP)
 527                 return -EINVAL;
 528
 529         old = sdata->u.ap.beacon;
 530
 531         if (!old)
 532                 return -ENOENT;
 533
 534         return ieee80211_config_beacon(sdata, params);
 535 }
 536
 537 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 538 {
 539         struct ieee80211_sub_if_data *sdata;
 540         struct beacon_data *old;
 541
 542         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 543
 544         if (sdata->vif.type != NL80211_IFTYPE_AP)
 545                 return -EINVAL;
 546
 547         old = sdata->u.ap.beacon;
 548
 549         if (!old)
 550                 return -ENOENT;
 551
 552         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 553         synchronize_rcu();
 554         kfree(old);
 555
 556         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 557 }
 558
 559 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 560 struct iapp_layer2_update {
 561         u8 da[ETH_ALEN];        /* broadcast */
 562         u8 sa[ETH_ALEN];        /* STA addr */
 563         __be16 len;             /* 6 */
 564         u8 dsap;                /* 0 */
 565         u8 ssap;                /* 0 */
 566         u8 control;
 567         u8 xid_info[3];
 568 } __attribute__ ((packed));
 569
 570 static void ieee80211_send_layer2_update(struct sta_info *sta)
 571 {
 572         struct iapp_layer2_update *msg;
 573         struct sk_buff *skb;
 574
 575         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 576          * bridge devices */
 577
 578         skb = dev_alloc_skb(sizeof(*msg));
 579         if (!skb)
 580                 return;
 581         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 582
 583         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 584          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 585
 586         memset(msg->da, 0xff, ETH_ALEN);
 587         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 588         msg->len = htons(6);
 589         msg->dsap = 0;
 590         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 591         msg->control = 0xaf;    /* XID response lsb.1111F101.
 592                                  * F=0 (no poll command; unsolicited frame) */
 593         msg->xid_info[0] = 0x81;        /* XID format identifier */
 594         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 595         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 596
 597         skb->dev = sta->sdata->dev;
 598         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 599         memset(skb->cb, 0, sizeof(skb->cb));
 600         netif_rx(skb);
 601 }
 602
 603 static void sta_apply_parameters(struct ieee80211_local *local,
 604                                  struct sta_info *sta,
 605                                  struct station_parameters *params)
 606 {
 607         u32 rates;
 608         int i, j;
 609         struct ieee80211_supported_band *sband;
 610         struct ieee80211_sub_if_data *sdata = sta->sdata;
 611
 612         sband = local->hw.wiphy->bands[local->oper_channel->band];
 613
 614         /*
 615          * FIXME: updating the flags is racy when this function is
 616          *        called from ieee80211_change_station(), this will
 617          *        be resolved in a future patch.
 618          */
 619
 620         if (params->station_flags & STATION_FLAG_CHANGED) {
 621                 spin_lock_bh(&sta->lock);
 622                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 623                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 624                         sta->flags |= WLAN_STA_AUTHORIZED;
 625
 626                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 627                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 628                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 629
 630                 sta->flags &= ~WLAN_STA_WME;
 631                 if (params->station_flags & STATION_FLAG_WME)
 632                         sta->flags |= WLAN_STA_WME;
 633                 spin_unlock_bh(&sta->lock);
 634         }
 635
 636         /*
 637          * FIXME: updating the following information is racy when this
 638          *        function is called from ieee80211_change_station().
 639          *        However, all this information should be static so
 640          *        maybe we should just reject attemps to change it.
 641          */
 642
 643         if (params->aid) {
 644                 sta->sta.aid = params->aid;
 645                 if (sta->sta.aid > IEEE80211_MAX_AID)
 646                         sta->sta.aid = 0; /* XXX: should this be an error? */
 647         }
 648
 649         if (params->listen_interval >= 0)
 650                 sta->listen_interval = params->listen_interval;
 651
 652         if (params->supported_rates) {
 653                 rates = 0;
 654
 655                 for (i = 0; i < params->supported_rates_len; i++) {
 656                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 657                         for (j = 0; j < sband->n_bitrates; j++) {
 658                                 if (sband->bitrates[j].bitrate == rate)
 659                                         rates |= BIT(j);
 660                         }
 661                 }
 662                 sta->sta.supp_rates[local->oper_channel->band] = rates;
 663         }
 664
 665         if (params->ht_capa)
 666                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
 667                                                   params->ht_capa,
 668                                                   &sta->sta.ht_cap);
 669
 670         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 671                 switch (params->plink_action) {
 672                 case PLINK_ACTION_OPEN:
 673                         mesh_plink_open(sta);
 674                         break;
 675                 case PLINK_ACTION_BLOCK:
 676                         mesh_plink_block(sta);
 677                         break;
 678                 }
 679         }
 680 }
 681
 682 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 683                                  u8 *mac, struct station_parameters *params)
 684 {
 685         struct ieee80211_local *local = wiphy_priv(wiphy);
 686         struct sta_info *sta;
 687         struct ieee80211_sub_if_data *sdata;
 688         int err;
 689         int layer2_update;
 690
 691         /* Prevent a race with changing the rate control algorithm */
 692         if (!netif_running(dev))
 693                 return -ENETDOWN;
 694
 695         if (params->vlan) {
 696                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 697
 698                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 699                     sdata->vif.type != NL80211_IFTYPE_AP)
 700                         return -EINVAL;
 701         } else
 702                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 703
 704         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 705                 return -EINVAL;
 706
 707         if (is_multicast_ether_addr(mac))
 708                 return -EINVAL;
 709
 710         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 711         if (!sta)
 712                 return -ENOMEM;
 713
 714         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 715
 716         sta_apply_parameters(local, sta, params);
 717
 718         rate_control_rate_init(sta);
 719
 720         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 721                 sdata->vif.type == NL80211_IFTYPE_AP;
 722
 723         rcu_read_lock();
 724
 725         err = sta_info_insert(sta);
 726         if (err) {
 727                 /* STA has been freed */
 728                 if (err == -EEXIST && layer2_update) {
 729                         /* Need to update layer 2 devices on reassociation */
 730                         sta = sta_info_get(local, mac);
 731                         if (sta)
 732                                 ieee80211_send_layer2_update(sta);
 733                 }
 734                 rcu_read_unlock();
 735                 return err;
 736         }
 737
 738         if (layer2_update)
 739                 ieee80211_send_layer2_update(sta);
 740
 741         rcu_read_unlock();
 742
 743         return 0;
 744 }
 745
 746 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 747                                  u8 *mac)
 748 {
 749         struct ieee80211_local *local = wiphy_priv(wiphy);
 750         struct ieee80211_sub_if_data *sdata;
 751         struct sta_info *sta;
 752
 753         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 754
 755         if (mac) {
 756                 rcu_read_lock();
 757
 758                 /* XXX: get sta belonging to dev */
 759                 sta = sta_info_get(local, mac);
 760                 if (!sta) {
 761                         rcu_read_unlock();
 762                         return -ENOENT;
 763                 }
 764
 765                 sta_info_unlink(&sta);
 766                 rcu_read_unlock();
 767
 768                 sta_info_destroy(sta);
 769         } else
 770                 sta_info_flush(local, sdata);
 771
 772         return 0;
 773 }
 774
 775 static int ieee80211_change_station(struct wiphy *wiphy,
 776                                     struct net_device *dev,
 777                                     u8 *mac,
 778                                     struct station_parameters *params)
 779 {
 780         struct ieee80211_local *local = wiphy_priv(wiphy);
 781         struct sta_info *sta;
 782         struct ieee80211_sub_if_data *vlansdata;
 783
 784         rcu_read_lock();
 785
 786         /* XXX: get sta belonging to dev */
 787         sta = sta_info_get(local, mac);
 788         if (!sta) {
 789                 rcu_read_unlock();
 790                 return -ENOENT;
 791         }
 792
 793         if (params->vlan && params->vlan != sta->sdata->dev) {
 794                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 795
 796                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
 797                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
 798                         rcu_read_unlock();
 799                         return -EINVAL;
 800                 }
 801
 802                 sta->sdata = vlansdata;
 803                 ieee80211_send_layer2_update(sta);
 804         }
 805
 806         sta_apply_parameters(local, sta, params);
 807
 808         rcu_read_unlock();
 809
 810         return 0;
 811 }
 812
 813 #ifdef CONFIG_MAC80211_MESH
 814 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 815                                  u8 *dst, u8 *next_hop)
 816 {
 817         struct ieee80211_local *local = wiphy_priv(wiphy);
 818         struct ieee80211_sub_if_data *sdata;
 819         struct mesh_path *mpath;
 820         struct sta_info *sta;
 821         int err;
 822
 823         if (!netif_running(dev))
 824                 return -ENETDOWN;
 825
 826         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 827
 828         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 829                 return -ENOTSUPP;
 830
 831         rcu_read_lock();
 832         sta = sta_info_get(local, next_hop);
 833         if (!sta) {
 834                 rcu_read_unlock();
 835                 return -ENOENT;
 836         }
 837
 838         err = mesh_path_add(dst, sdata);
 839         if (err) {
 840                 rcu_read_unlock();
 841                 return err;
 842         }
 843
 844         mpath = mesh_path_lookup(dst, sdata);
 845         if (!mpath) {
 846                 rcu_read_unlock();
 847                 return -ENXIO;
 848         }
 849         mesh_path_fix_nexthop(mpath, sta);
 850
 851         rcu_read_unlock();
 852         return 0;
 853 }
 854
 855 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 856                                  u8 *dst)
 857 {
 858         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 859
 860         if (dst)
 861                 return mesh_path_del(dst, sdata);
 862
 863         mesh_path_flush(sdata);
 864         return 0;
 865 }
 866
 867 static int ieee80211_change_mpath(struct wiphy *wiphy,
 868                                     struct net_device *dev,
 869                                     u8 *dst, u8 *next_hop)
 870 {
 871         struct ieee80211_local *local = wiphy_priv(wiphy);
 872         struct ieee80211_sub_if_data *sdata;
 873         struct mesh_path *mpath;
 874         struct sta_info *sta;
 875
 876         if (!netif_running(dev))
 877                 return -ENETDOWN;
 878
 879         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 880
 881         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 882                 return -ENOTSUPP;
 883
 884         rcu_read_lock();
 885
 886         sta = sta_info_get(local, next_hop);
 887         if (!sta) {
 888                 rcu_read_unlock();
 889                 return -ENOENT;
 890         }
 891
 892         mpath = mesh_path_lookup(dst, sdata);
 893         if (!mpath) {
 894                 rcu_read_unlock();
 895                 return -ENOENT;
 896         }
 897
 898         mesh_path_fix_nexthop(mpath, sta);
 899
 900         rcu_read_unlock();
 901         return 0;
 902 }
 903
 904 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 905                             struct mpath_info *pinfo)
 906 {
 907         if (mpath->next_hop)
 908                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 909         else
 910                 memset(next_hop, 0, ETH_ALEN);
 911
 912         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 913                         MPATH_INFO_DSN |
 914                         MPATH_INFO_METRIC |
 915                         MPATH_INFO_EXPTIME |
 916                         MPATH_INFO_DISCOVERY_TIMEOUT |
 917                         MPATH_INFO_DISCOVERY_RETRIES |
 918                         MPATH_INFO_FLAGS;
 919
 920         pinfo->frame_qlen = mpath->frame_queue.qlen;
 921         pinfo->dsn = mpath->dsn;
 922         pinfo->metric = mpath->metric;
 923         if (time_before(jiffies, mpath->exp_time))
 924                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 925         pinfo->discovery_timeout =
 926                         jiffies_to_msecs(mpath->discovery_timeout);
 927         pinfo->discovery_retries = mpath->discovery_retries;
 928         pinfo->flags = 0;
 929         if (mpath->flags & MESH_PATH_ACTIVE)
 930                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 931         if (mpath->flags & MESH_PATH_RESOLVING)
 932                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 933         if (mpath->flags & MESH_PATH_DSN_VALID)
 934                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 935         if (mpath->flags & MESH_PATH_FIXED)
 936                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 937         if (mpath->flags & MESH_PATH_RESOLVING)
 938                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 939
 940         pinfo->flags = mpath->flags;
 941 }
 942
 943 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 944                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 945
 946 {
 947         struct ieee80211_sub_if_data *sdata;
 948         struct mesh_path *mpath;
 949
 950         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 951
 952         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 953                 return -ENOTSUPP;
 954
 955         rcu_read_lock();
 956         mpath = mesh_path_lookup(dst, sdata);
 957         if (!mpath) {
 958                 rcu_read_unlock();
 959                 return -ENOENT;
 960         }
 961         memcpy(dst, mpath->dst, ETH_ALEN);
 962         mpath_set_pinfo(mpath, next_hop, pinfo);
 963         rcu_read_unlock();
 964         return 0;
 965 }
 966
 967 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 968                                  int idx, u8 *dst, u8 *next_hop,
 969                                  struct mpath_info *pinfo)
 970 {
 971         struct ieee80211_sub_if_data *sdata;
 972         struct mesh_path *mpath;
 973
 974         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 975
 976         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 977                 return -ENOTSUPP;
 978
 979         rcu_read_lock();
 980         mpath = mesh_path_lookup_by_idx(idx, sdata);
 981         if (!mpath) {
 982                 rcu_read_unlock();
 983                 return -ENOENT;
 984         }
 985         memcpy(dst, mpath->dst, ETH_ALEN);
 986         mpath_set_pinfo(mpath, next_hop, pinfo);
 987         rcu_read_unlock();
 988         return 0;
 989 }
 990
 991 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
 992                                 struct net_device *dev,
 993                                 struct mesh_config *conf)
 994 {
 995         struct ieee80211_sub_if_data *sdata;
 996         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 997
 998         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
 999                 return -ENOTSUPP;
1000         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1001         return 0;
1002 }
1003
1004 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1005 {
1006         return (mask >> (parm-1)) & 0x1;
1007 }
1008
1009 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
1010                                 struct net_device *dev,
1011                                 const struct mesh_config *nconf, u32 mask)
1012 {
1013         struct mesh_config *conf;
1014         struct ieee80211_sub_if_data *sdata;
1015         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1016
1017         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1018                 return -ENOTSUPP;
1019
1020         /* Set the config options which we are interested in setting */
1021         conf = &(sdata->u.mesh.mshcfg);
1022         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1023                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1024         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1025                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1026         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1027                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1028         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1029                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1030         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1031                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1032         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1033                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1034         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1035                 conf->auto_open_plinks = nconf->auto_open_plinks;
1036         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1037                 conf->dot11MeshHWMPmaxPREQretries =
1038                         nconf->dot11MeshHWMPmaxPREQretries;
1039         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1040                 conf->path_refresh_time = nconf->path_refresh_time;
1041         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1042                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1043         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1044                 conf->dot11MeshHWMPactivePathTimeout =
1045                         nconf->dot11MeshHWMPactivePathTimeout;
1046         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1047                 conf->dot11MeshHWMPpreqMinInterval =
1048                         nconf->dot11MeshHWMPpreqMinInterval;
1049         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1050                            mask))
1051                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1052                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1053         return 0;
1054 }
1055
1056 #endif
1057
1058 static int ieee80211_change_bss(struct wiphy *wiphy,
1059                                 struct net_device *dev,
1060                                 struct bss_parameters *params)
1061 {
1062         struct ieee80211_sub_if_data *sdata;
1063         u32 changed = 0;
1064
1065         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1066
1067         if (sdata->vif.type != NL80211_IFTYPE_AP)
1068                 return -EINVAL;
1069
1070         if (params->use_cts_prot >= 0) {
1071                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1072                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1073         }
1074         if (params->use_short_preamble >= 0) {
1075                 sdata->vif.bss_conf.use_short_preamble =
1076                         params->use_short_preamble;
1077                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1078         }
1079         if (params->use_short_slot_time >= 0) {
1080                 sdata->vif.bss_conf.use_short_slot =
1081                         params->use_short_slot_time;
1082                 changed |= BSS_CHANGED_ERP_SLOT;
1083         }
1084
1085         if (params->basic_rates) {
1086                 int i, j;
1087                 u32 rates = 0;
1088                 struct ieee80211_local *local = wiphy_priv(wiphy);
1089                 struct ieee80211_supported_band *sband =
1090                         wiphy->bands[local->oper_channel->band];
1091
1092                 for (i = 0; i < params->basic_rates_len; i++) {
1093                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1094                         for (j = 0; j < sband->n_bitrates; j++) {
1095                                 if (sband->bitrates[j].bitrate == rate)
1096                                         rates |= BIT(j);
1097                         }
1098                 }
1099                 sdata->vif.bss_conf.basic_rates = rates;
1100                 changed |= BSS_CHANGED_BASIC_RATES;
1101         }
1102
1103         ieee80211_bss_info_change_notify(sdata, changed);
1104
1105         return 0;
1106 }
1107
1108 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1109                                     struct ieee80211_txq_params *params)
1110 {
1111         struct ieee80211_local *local = wiphy_priv(wiphy);
1112         struct ieee80211_tx_queue_params p;
1113
1114         if (!local->ops->conf_tx)
1115                 return -EOPNOTSUPP;
1116
1117         memset(&p, 0, sizeof(p));
1118         p.aifs = params->aifs;
1119         p.cw_max = params->cwmax;
1120         p.cw_min = params->cwmin;
1121         p.txop = params->txop;
1122         if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1123                 printk(KERN_DEBUG "%s: failed to set TX queue "
1124                        "parameters for queue %d\n", local->mdev->name,
1125                        params->queue);
1126                 return -EINVAL;
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int ieee80211_set_channel(struct wiphy *wiphy,
1133                                  struct ieee80211_channel *chan,
1134                                  enum nl80211_channel_type channel_type)
1135 {
1136         struct ieee80211_local *local = wiphy_priv(wiphy);
1137
1138         local->oper_channel = chan;
1139         local->oper_channel_type = channel_type;
1140
1141         return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1142 }
1143
1144 struct cfg80211_ops mac80211_config_ops = {
1145         .add_virtual_intf = ieee80211_add_iface,
1146         .del_virtual_intf = ieee80211_del_iface,
1147         .change_virtual_intf = ieee80211_change_iface,
1148         .add_key = ieee80211_add_key,
1149         .del_key = ieee80211_del_key,
1150         .get_key = ieee80211_get_key,
1151         .set_default_key = ieee80211_config_default_key,
1152         .add_beacon = ieee80211_add_beacon,
1153         .set_beacon = ieee80211_set_beacon,
1154         .del_beacon = ieee80211_del_beacon,
1155         .add_station = ieee80211_add_station,
1156         .del_station = ieee80211_del_station,
1157         .change_station = ieee80211_change_station,
1158         .get_station = ieee80211_get_station,
1159         .dump_station = ieee80211_dump_station,
1160 #ifdef CONFIG_MAC80211_MESH
1161         .add_mpath = ieee80211_add_mpath,
1162         .del_mpath = ieee80211_del_mpath,
1163         .change_mpath = ieee80211_change_mpath,
1164         .get_mpath = ieee80211_get_mpath,
1165         .dump_mpath = ieee80211_dump_mpath,
1166         .set_mesh_params = ieee80211_set_mesh_params,
1167         .get_mesh_params = ieee80211_get_mesh_params,
1168 #endif
1169         .change_bss = ieee80211_change_bss,
1170         .set_txq_params = ieee80211_set_txq_params,
1171         .set_channel = ieee80211_set_channel,
1172 };