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 enum ieee80211_if_types
  21 nl80211_type_to_mac80211_type(enum nl80211_iftype type)
  22 {
  23         switch (type) {
  24         case NL80211_IFTYPE_UNSPECIFIED:
  25                 return IEEE80211_IF_TYPE_STA;
  26         case NL80211_IFTYPE_ADHOC:
  27                 return IEEE80211_IF_TYPE_IBSS;
  28         case NL80211_IFTYPE_STATION:
  29                 return IEEE80211_IF_TYPE_STA;
  30         case NL80211_IFTYPE_MONITOR:
  31                 return IEEE80211_IF_TYPE_MNTR;
  32 #ifdef CONFIG_MAC80211_MESH
  33         case NL80211_IFTYPE_MESH_POINT:
  34                 return IEEE80211_IF_TYPE_MESH_POINT;
  35 #endif
  36         case NL80211_IFTYPE_WDS:
  37                 return IEEE80211_IF_TYPE_WDS;
  38         default:
  39                 return IEEE80211_IF_TYPE_INVALID;
  40         }
  41 }
  42
  43 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
  44                                enum nl80211_iftype type, u32 *flags,
  45                                struct vif_params *params)
  46 {
  47         struct ieee80211_local *local = wiphy_priv(wiphy);
  48         enum ieee80211_if_types itype;
  49         struct net_device *dev;
  50         struct ieee80211_sub_if_data *sdata;
  51         int err;
  52
  53         itype = nl80211_type_to_mac80211_type(type);
  54         if (itype == IEEE80211_IF_TYPE_INVALID)
  55                 return -EINVAL;
  56
  57         err = ieee80211_if_add(local, name, &dev, itype, params);
  58         if (err || itype != IEEE80211_IF_TYPE_MNTR || !flags)
  59                 return err;
  60
  61         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  62         sdata->u.mntr_flags = *flags;
  63         return 0;
  64 }
  65
  66 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
  67 {
  68         struct net_device *dev;
  69         struct ieee80211_sub_if_data *sdata;
  70
  71         /* we're under RTNL */
  72         dev = __dev_get_by_index(&init_net, ifindex);
  73         if (!dev)
  74                 return -ENODEV;
  75
  76         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  77
  78         ieee80211_if_remove(sdata);
  79
  80         return 0;
  81 }
  82
  83 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
  84                                   enum nl80211_iftype type, u32 *flags,
  85                                   struct vif_params *params)
  86 {
  87         struct ieee80211_local *local = wiphy_priv(wiphy);
  88         struct net_device *dev;
  89         enum ieee80211_if_types itype;
  90         struct ieee80211_sub_if_data *sdata;
  91         int ret;
  92
  93         /* we're under RTNL */
  94         dev = __dev_get_by_index(&init_net, ifindex);
  95         if (!dev)
  96                 return -ENODEV;
  97
  98         itype = nl80211_type_to_mac80211_type(type);
  99         if (itype == IEEE80211_IF_TYPE_INVALID)
 100                 return -EINVAL;
 101
 102         if (dev == local->mdev)
 103                 return -EOPNOTSUPP;
 104
 105         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 106
 107         ret = ieee80211_if_change_type(sdata, itype);
 108         if (ret)
 109                 return ret;
 110
 111         if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
 112                 ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
 113                                              params->mesh_id_len,
 114                                              params->mesh_id);
 115
 116         if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || !flags)
 117                 return 0;
 118
 119         sdata->u.mntr_flags = *flags;
 120         return 0;
 121 }
 122
 123 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 124                              u8 key_idx, u8 *mac_addr,
 125                              struct key_params *params)
 126 {
 127         struct ieee80211_local *local = wiphy_priv(wiphy);
 128         struct ieee80211_sub_if_data *sdata;
 129         struct sta_info *sta = NULL;
 130         enum ieee80211_key_alg alg;
 131         struct ieee80211_key *key;
 132         int err;
 133
 134         if (dev == local->mdev)
 135                 return -EOPNOTSUPP;
 136
 137         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 138
 139         switch (params->cipher) {
 140         case WLAN_CIPHER_SUITE_WEP40:
 141         case WLAN_CIPHER_SUITE_WEP104:
 142                 alg = ALG_WEP;
 143                 break;
 144         case WLAN_CIPHER_SUITE_TKIP:
 145                 alg = ALG_TKIP;
 146                 break;
 147         case WLAN_CIPHER_SUITE_CCMP:
 148                 alg = ALG_CCMP;
 149                 break;
 150         default:
 151                 return -EINVAL;
 152         }
 153
 154         key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
 155         if (!key)
 156                 return -ENOMEM;
 157
 158         rcu_read_lock();
 159
 160         if (mac_addr) {
 161                 sta = sta_info_get(sdata->local, mac_addr);
 162                 if (!sta) {
 163                         ieee80211_key_free(key);
 164                         err = -ENOENT;
 165                         goto out_unlock;
 166                 }
 167         }
 168
 169         ieee80211_key_link(key, sdata, sta);
 170
 171         err = 0;
 172  out_unlock:
 173         rcu_read_unlock();
 174
 175         return err;
 176 }
 177
 178 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 179                              u8 key_idx, u8 *mac_addr)
 180 {
 181         struct ieee80211_local *local = wiphy_priv(wiphy);
 182         struct ieee80211_sub_if_data *sdata;
 183         struct sta_info *sta;
 184         int ret;
 185
 186         if (dev == local->mdev)
 187                 return -EOPNOTSUPP;
 188
 189         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 190
 191         rcu_read_lock();
 192
 193         if (mac_addr) {
 194                 ret = -ENOENT;
 195
 196                 sta = sta_info_get(sdata->local, mac_addr);
 197                 if (!sta)
 198                         goto out_unlock;
 199
 200                 if (sta->key) {
 201                         ieee80211_key_free(sta->key);
 202                         WARN_ON(sta->key);
 203                         ret = 0;
 204                 }
 205
 206                 goto out_unlock;
 207         }
 208
 209         if (!sdata->keys[key_idx]) {
 210                 ret = -ENOENT;
 211                 goto out_unlock;
 212         }
 213
 214         ieee80211_key_free(sdata->keys[key_idx]);
 215         WARN_ON(sdata->keys[key_idx]);
 216
 217         ret = 0;
 218  out_unlock:
 219         rcu_read_unlock();
 220
 221         return ret;
 222 }
 223
 224 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 225                              u8 key_idx, u8 *mac_addr, void *cookie,
 226                              void (*callback)(void *cookie,
 227                                               struct key_params *params))
 228 {
 229         struct ieee80211_local *local = wiphy_priv(wiphy);
 230         struct ieee80211_sub_if_data *sdata;
 231         struct sta_info *sta = NULL;
 232         u8 seq[6] = {0};
 233         struct key_params params;
 234         struct ieee80211_key *key;
 235         u32 iv32;
 236         u16 iv16;
 237         int err = -ENOENT;
 238
 239         if (dev == local->mdev)
 240                 return -EOPNOTSUPP;
 241
 242         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 243
 244         rcu_read_lock();
 245
 246         if (mac_addr) {
 247                 sta = sta_info_get(sdata->local, mac_addr);
 248                 if (!sta)
 249                         goto out;
 250
 251                 key = sta->key;
 252         } else
 253                 key = sdata->keys[key_idx];
 254
 255         if (!key)
 256                 goto out;
 257
 258         memset(&params, 0, sizeof(params));
 259
 260         switch (key->conf.alg) {
 261         case ALG_TKIP:
 262                 params.cipher = WLAN_CIPHER_SUITE_TKIP;
 263
 264                 iv32 = key->u.tkip.tx.iv32;
 265                 iv16 = key->u.tkip.tx.iv16;
 266
 267                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 268                     sdata->local->ops->get_tkip_seq)
 269                         sdata->local->ops->get_tkip_seq(
 270                                 local_to_hw(sdata->local),
 271                                 key->conf.hw_key_idx,
 272                                 &iv32, &iv16);
 273
 274                 seq[0] = iv16 & 0xff;
 275                 seq[1] = (iv16 >> 8) & 0xff;
 276                 seq[2] = iv32 & 0xff;
 277                 seq[3] = (iv32 >> 8) & 0xff;
 278                 seq[4] = (iv32 >> 16) & 0xff;
 279                 seq[5] = (iv32 >> 24) & 0xff;
 280                 params.seq = seq;
 281                 params.seq_len = 6;
 282                 break;
 283         case ALG_CCMP:
 284                 params.cipher = WLAN_CIPHER_SUITE_CCMP;
 285                 seq[0] = key->u.ccmp.tx_pn[5];
 286                 seq[1] = key->u.ccmp.tx_pn[4];
 287                 seq[2] = key->u.ccmp.tx_pn[3];
 288                 seq[3] = key->u.ccmp.tx_pn[2];
 289                 seq[4] = key->u.ccmp.tx_pn[1];
 290                 seq[5] = key->u.ccmp.tx_pn[0];
 291                 params.seq = seq;
 292                 params.seq_len = 6;
 293                 break;
 294         case ALG_WEP:
 295                 if (key->conf.keylen == 5)
 296                         params.cipher = WLAN_CIPHER_SUITE_WEP40;
 297                 else
 298                         params.cipher = WLAN_CIPHER_SUITE_WEP104;
 299                 break;
 300         }
 301
 302         params.key = key->conf.key;
 303         params.key_len = key->conf.keylen;
 304
 305         callback(cookie, &params);
 306         err = 0;
 307
 308  out:
 309         rcu_read_unlock();
 310         return err;
 311 }
 312
 313 static int ieee80211_config_default_key(struct wiphy *wiphy,
 314                                         struct net_device *dev,
 315                                         u8 key_idx)
 316 {
 317         struct ieee80211_local *local = wiphy_priv(wiphy);
 318         struct ieee80211_sub_if_data *sdata;
 319
 320         if (dev == local->mdev)
 321                 return -EOPNOTSUPP;
 322
 323         rcu_read_lock();
 324
 325         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 326         ieee80211_set_default_key(sdata, key_idx);
 327
 328         rcu_read_unlock();
 329
 330         return 0;
 331 }
 332
 333 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 334 {
 335         struct ieee80211_sub_if_data *sdata = sta->sdata;
 336
 337         sinfo->filled = STATION_INFO_INACTIVE_TIME |
 338                         STATION_INFO_RX_BYTES |
 339                         STATION_INFO_TX_BYTES;
 340
 341         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 342         sinfo->rx_bytes = sta->rx_bytes;
 343         sinfo->tx_bytes = sta->tx_bytes;
 344
 345         if (ieee80211_vif_is_mesh(&sdata->vif)) {
 346 #ifdef CONFIG_MAC80211_MESH
 347                 sinfo->filled |= STATION_INFO_LLID |
 348                                  STATION_INFO_PLID |
 349                                  STATION_INFO_PLINK_STATE;
 350
 351                 sinfo->llid = le16_to_cpu(sta->llid);
 352                 sinfo->plid = le16_to_cpu(sta->plid);
 353                 sinfo->plink_state = sta->plink_state;
 354 #endif
 355         }
 356 }
 357
 358
 359 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 360                                  int idx, u8 *mac, struct station_info *sinfo)
 361 {
 362         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 363         struct sta_info *sta;
 364         int ret = -ENOENT;
 365
 366         rcu_read_lock();
 367
 368         sta = sta_info_get_by_idx(local, idx, dev);
 369         if (sta) {
 370                 ret = 0;
 371                 memcpy(mac, sta->addr, ETH_ALEN);
 372                 sta_set_sinfo(sta, sinfo);
 373         }
 374
 375         rcu_read_unlock();
 376
 377         return ret;
 378 }
 379
 380 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 381                                  u8 *mac, struct station_info *sinfo)
 382 {
 383         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 384         struct sta_info *sta;
 385         int ret = -ENOENT;
 386
 387         rcu_read_lock();
 388
 389         /* XXX: verify sta->dev == dev */
 390
 391         sta = sta_info_get(local, mac);
 392         if (sta) {
 393                 ret = 0;
 394                 sta_set_sinfo(sta, sinfo);
 395         }
 396
 397         rcu_read_unlock();
 398
 399         return ret;
 400 }
 401
 402 /*
 403  * This handles both adding a beacon and setting new beacon info
 404  */
 405 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 406                                    struct beacon_parameters *params)
 407 {
 408         struct beacon_data *new, *old;
 409         int new_head_len, new_tail_len;
 410         int size;
 411         int err = -EINVAL;
 412
 413         old = sdata->u.ap.beacon;
 414
 415         /* head must not be zero-length */
 416         if (params->head && !params->head_len)
 417                 return -EINVAL;
 418
 419         /*
 420          * This is a kludge. beacon interval should really be part
 421          * of the beacon information.
 422          */
 423         if (params->interval) {
 424                 sdata->local->hw.conf.beacon_int = params->interval;
 425                 if (ieee80211_hw_config(sdata->local))
 426                         return -EINVAL;
 427                 /*
 428                  * We updated some parameter so if below bails out
 429                  * it's not an error.
 430                  */
 431                 err = 0;
 432         }
 433
 434         /* Need to have a beacon head if we don't have one yet */
 435         if (!params->head && !old)
 436                 return err;
 437
 438         /* sorry, no way to start beaconing without dtim period */
 439         if (!params->dtim_period && !old)
 440                 return err;
 441
 442         /* new or old head? */
 443         if (params->head)
 444                 new_head_len = params->head_len;
 445         else
 446                 new_head_len = old->head_len;
 447
 448         /* new or old tail? */
 449         if (params->tail || !old)
 450                 /* params->tail_len will be zero for !params->tail */
 451                 new_tail_len = params->tail_len;
 452         else
 453                 new_tail_len = old->tail_len;
 454
 455         size = sizeof(*new) + new_head_len + new_tail_len;
 456
 457         new = kzalloc(size, GFP_KERNEL);
 458         if (!new)
 459                 return -ENOMEM;
 460
 461         /* start filling the new info now */
 462
 463         /* new or old dtim period? */
 464         if (params->dtim_period)
 465                 new->dtim_period = params->dtim_period;
 466         else
 467                 new->dtim_period = old->dtim_period;
 468
 469         /*
 470          * pointers go into the block we allocated,
 471          * memory is | beacon_data | head | tail |
 472          */
 473         new->head = ((u8 *) new) + sizeof(*new);
 474         new->tail = new->head + new_head_len;
 475         new->head_len = new_head_len;
 476         new->tail_len = new_tail_len;
 477
 478         /* copy in head */
 479         if (params->head)
 480                 memcpy(new->head, params->head, new_head_len);
 481         else
 482                 memcpy(new->head, old->head, new_head_len);
 483
 484         /* copy in optional tail */
 485         if (params->tail)
 486                 memcpy(new->tail, params->tail, new_tail_len);
 487         else
 488                 if (old)
 489                         memcpy(new->tail, old->tail, new_tail_len);
 490
 491         rcu_assign_pointer(sdata->u.ap.beacon, new);
 492
 493         synchronize_rcu();
 494
 495         kfree(old);
 496
 497         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 498 }
 499
 500 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 501                                 struct beacon_parameters *params)
 502 {
 503         struct ieee80211_local *local = wiphy_priv(wiphy);
 504         struct ieee80211_sub_if_data *sdata;
 505         struct beacon_data *old;
 506
 507         if (dev == local->mdev)
 508                 return -EOPNOTSUPP;
 509
 510         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 511
 512         if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 513                 return -EINVAL;
 514
 515         old = sdata->u.ap.beacon;
 516
 517         if (old)
 518                 return -EALREADY;
 519
 520         return ieee80211_config_beacon(sdata, params);
 521 }
 522
 523 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 524                                 struct beacon_parameters *params)
 525 {
 526         struct ieee80211_local *local = wiphy_priv(wiphy);
 527         struct ieee80211_sub_if_data *sdata;
 528         struct beacon_data *old;
 529
 530         if (dev == local->mdev)
 531                 return -EOPNOTSUPP;
 532
 533         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 534
 535         if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 536                 return -EINVAL;
 537
 538         old = sdata->u.ap.beacon;
 539
 540         if (!old)
 541                 return -ENOENT;
 542
 543         return ieee80211_config_beacon(sdata, params);
 544 }
 545
 546 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 547 {
 548         struct ieee80211_local *local = wiphy_priv(wiphy);
 549         struct ieee80211_sub_if_data *sdata;
 550         struct beacon_data *old;
 551
 552         if (dev == local->mdev)
 553                 return -EOPNOTSUPP;
 554
 555         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 556
 557         if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 558                 return -EINVAL;
 559
 560         old = sdata->u.ap.beacon;
 561
 562         if (!old)
 563                 return -ENOENT;
 564
 565         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 566         synchronize_rcu();
 567         kfree(old);
 568
 569         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
 570 }
 571
 572 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 573 struct iapp_layer2_update {
 574         u8 da[ETH_ALEN];        /* broadcast */
 575         u8 sa[ETH_ALEN];        /* STA addr */
 576         __be16 len;             /* 6 */
 577         u8 dsap;                /* 0 */
 578         u8 ssap;                /* 0 */
 579         u8 control;
 580         u8 xid_info[3];
 581 } __attribute__ ((packed));
 582
 583 static void ieee80211_send_layer2_update(struct sta_info *sta)
 584 {
 585         struct iapp_layer2_update *msg;
 586         struct sk_buff *skb;
 587
 588         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 589          * bridge devices */
 590
 591         skb = dev_alloc_skb(sizeof(*msg));
 592         if (!skb)
 593                 return;
 594         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 595
 596         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 597          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 598
 599         memset(msg->da, 0xff, ETH_ALEN);
 600         memcpy(msg->sa, sta->addr, ETH_ALEN);
 601         msg->len = htons(6);
 602         msg->dsap = 0;
 603         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 604         msg->control = 0xaf;    /* XID response lsb.1111F101.
 605                                  * F=0 (no poll command; unsolicited frame) */
 606         msg->xid_info[0] = 0x81;        /* XID format identifier */
 607         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 608         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 609
 610         skb->dev = sta->sdata->dev;
 611         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 612         memset(skb->cb, 0, sizeof(skb->cb));
 613         netif_rx(skb);
 614 }
 615
 616 static void sta_apply_parameters(struct ieee80211_local *local,
 617                                  struct sta_info *sta,
 618                                  struct station_parameters *params)
 619 {
 620         u32 rates;
 621         int i, j;
 622         struct ieee80211_supported_band *sband;
 623         struct ieee80211_sub_if_data *sdata = sta->sdata;
 624
 625         /*
 626          * FIXME: updating the flags is racy when this function is
 627          *        called from ieee80211_change_station(), this will
 628          *        be resolved in a future patch.
 629          */
 630
 631         if (params->station_flags & STATION_FLAG_CHANGED) {
 632                 spin_lock_bh(&sta->lock);
 633                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 634                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 635                         sta->flags |= WLAN_STA_AUTHORIZED;
 636
 637                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 638                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 639                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 640
 641                 sta->flags &= ~WLAN_STA_WME;
 642                 if (params->station_flags & STATION_FLAG_WME)
 643                         sta->flags |= WLAN_STA_WME;
 644                 spin_unlock_bh(&sta->lock);
 645         }
 646
 647         /*
 648          * FIXME: updating the following information is racy when this
 649          *        function is called from ieee80211_change_station().
 650          *        However, all this information should be static so
 651          *        maybe we should just reject attemps to change it.
 652          */
 653
 654         if (params->aid) {
 655                 sta->aid = params->aid;
 656                 if (sta->aid > IEEE80211_MAX_AID)
 657                         sta->aid = 0; /* XXX: should this be an error? */
 658         }
 659
 660         if (params->listen_interval >= 0)
 661                 sta->listen_interval = params->listen_interval;
 662
 663         if (params->supported_rates) {
 664                 rates = 0;
 665                 sband = local->hw.wiphy->bands[local->oper_channel->band];
 666
 667                 for (i = 0; i < params->supported_rates_len; i++) {
 668                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 669                         for (j = 0; j < sband->n_bitrates; j++) {
 670                                 if (sband->bitrates[j].bitrate == rate)
 671                                         rates |= BIT(j);
 672                         }
 673                 }
 674                 sta->supp_rates[local->oper_channel->band] = rates;
 675         }
 676
 677         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 678                 switch (params->plink_action) {
 679                 case PLINK_ACTION_OPEN:
 680                         mesh_plink_open(sta);
 681                         break;
 682                 case PLINK_ACTION_BLOCK:
 683                         mesh_plink_block(sta);
 684                         break;
 685                 }
 686         }
 687 }
 688
 689 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 690                                  u8 *mac, struct station_parameters *params)
 691 {
 692         struct ieee80211_local *local = wiphy_priv(wiphy);
 693         struct sta_info *sta;
 694         struct ieee80211_sub_if_data *sdata;
 695         int err;
 696
 697         if (dev == local->mdev || params->vlan == local->mdev)
 698                 return -EOPNOTSUPP;
 699
 700         /* Prevent a race with changing the rate control algorithm */
 701         if (!netif_running(dev))
 702                 return -ENETDOWN;
 703
 704         if (params->vlan) {
 705                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 706
 707                 if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN &&
 708                     sdata->vif.type != IEEE80211_IF_TYPE_AP)
 709                         return -EINVAL;
 710         } else
 711                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 712
 713         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 714                 return -EINVAL;
 715
 716         if (is_multicast_ether_addr(mac))
 717                 return -EINVAL;
 718
 719         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 720         if (!sta)
 721                 return -ENOMEM;
 722
 723         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 724
 725         sta_apply_parameters(local, sta, params);
 726
 727         rate_control_rate_init(sta, local);
 728
 729         rcu_read_lock();
 730
 731         err = sta_info_insert(sta);
 732         if (err) {
 733                 /* STA has been freed */
 734                 rcu_read_unlock();
 735                 return err;
 736         }
 737
 738         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN ||
 739             sdata->vif.type == IEEE80211_IF_TYPE_AP)
 740                 ieee80211_send_layer2_update(sta);
 741
 742         rcu_read_unlock();
 743
 744         return 0;
 745 }
 746
 747 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 748                                  u8 *mac)
 749 {
 750         struct ieee80211_local *local = wiphy_priv(wiphy);
 751         struct ieee80211_sub_if_data *sdata;
 752         struct sta_info *sta;
 753
 754         if (dev == local->mdev)
 755                 return -EOPNOTSUPP;
 756
 757         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 758
 759         if (mac) {
 760                 rcu_read_lock();
 761
 762                 /* XXX: get sta belonging to dev */
 763                 sta = sta_info_get(local, mac);
 764                 if (!sta) {
 765                         rcu_read_unlock();
 766                         return -ENOENT;
 767                 }
 768
 769                 sta_info_unlink(&sta);
 770                 rcu_read_unlock();
 771
 772                 sta_info_destroy(sta);
 773         } else
 774                 sta_info_flush(local, sdata);
 775
 776         return 0;
 777 }
 778
 779 static int ieee80211_change_station(struct wiphy *wiphy,
 780                                     struct net_device *dev,
 781                                     u8 *mac,
 782                                     struct station_parameters *params)
 783 {
 784         struct ieee80211_local *local = wiphy_priv(wiphy);
 785         struct sta_info *sta;
 786         struct ieee80211_sub_if_data *vlansdata;
 787
 788         if (dev == local->mdev || params->vlan == local->mdev)
 789                 return -EOPNOTSUPP;
 790
 791         rcu_read_lock();
 792
 793         /* XXX: get sta belonging to dev */
 794         sta = sta_info_get(local, mac);
 795         if (!sta) {
 796                 rcu_read_unlock();
 797                 return -ENOENT;
 798         }
 799
 800         if (params->vlan && params->vlan != sta->sdata->dev) {
 801                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 802
 803                 if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN &&
 804                     vlansdata->vif.type != IEEE80211_IF_TYPE_AP) {
 805                         rcu_read_unlock();
 806                         return -EINVAL;
 807                 }
 808
 809                 sta->sdata = vlansdata;
 810                 ieee80211_send_layer2_update(sta);
 811         }
 812
 813         sta_apply_parameters(local, sta, params);
 814
 815         rcu_read_unlock();
 816
 817         return 0;
 818 }
 819
 820 #ifdef CONFIG_MAC80211_MESH
 821 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 822                                  u8 *dst, u8 *next_hop)
 823 {
 824         struct ieee80211_local *local = wiphy_priv(wiphy);
 825         struct ieee80211_sub_if_data *sdata;
 826         struct mesh_path *mpath;
 827         struct sta_info *sta;
 828         int err;
 829
 830         if (dev == local->mdev)
 831                 return -EOPNOTSUPP;
 832
 833         if (!netif_running(dev))
 834                 return -ENETDOWN;
 835
 836         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 837
 838         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 839                 return -ENOTSUPP;
 840
 841         rcu_read_lock();
 842         sta = sta_info_get(local, next_hop);
 843         if (!sta) {
 844                 rcu_read_unlock();
 845                 return -ENOENT;
 846         }
 847
 848         err = mesh_path_add(dst, sdata);
 849         if (err) {
 850                 rcu_read_unlock();
 851                 return err;
 852         }
 853
 854         mpath = mesh_path_lookup(dst, sdata);
 855         if (!mpath) {
 856                 rcu_read_unlock();
 857                 return -ENXIO;
 858         }
 859         mesh_path_fix_nexthop(mpath, sta);
 860
 861         rcu_read_unlock();
 862         return 0;
 863 }
 864
 865 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 866                                  u8 *dst)
 867 {
 868         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 869
 870         if (dst)
 871                 return mesh_path_del(dst, sdata);
 872
 873         mesh_path_flush(sdata);
 874         return 0;
 875 }
 876
 877 static int ieee80211_change_mpath(struct wiphy *wiphy,
 878                                     struct net_device *dev,
 879                                     u8 *dst, u8 *next_hop)
 880 {
 881         struct ieee80211_local *local = wiphy_priv(wiphy);
 882         struct ieee80211_sub_if_data *sdata;
 883         struct mesh_path *mpath;
 884         struct sta_info *sta;
 885
 886         if (dev == local->mdev)
 887                 return -EOPNOTSUPP;
 888
 889         if (!netif_running(dev))
 890                 return -ENETDOWN;
 891
 892         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 893
 894         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 895                 return -ENOTSUPP;
 896
 897         rcu_read_lock();
 898
 899         sta = sta_info_get(local, next_hop);
 900         if (!sta) {
 901                 rcu_read_unlock();
 902                 return -ENOENT;
 903         }
 904
 905         mpath = mesh_path_lookup(dst, sdata);
 906         if (!mpath) {
 907                 rcu_read_unlock();
 908                 return -ENOENT;
 909         }
 910
 911         mesh_path_fix_nexthop(mpath, sta);
 912
 913         rcu_read_unlock();
 914         return 0;
 915 }
 916
 917 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 918                             struct mpath_info *pinfo)
 919 {
 920         if (mpath->next_hop)
 921                 memcpy(next_hop, mpath->next_hop->addr, ETH_ALEN);
 922         else
 923                 memset(next_hop, 0, ETH_ALEN);
 924
 925         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 926                         MPATH_INFO_DSN |
 927                         MPATH_INFO_METRIC |
 928                         MPATH_INFO_EXPTIME |
 929                         MPATH_INFO_DISCOVERY_TIMEOUT |
 930                         MPATH_INFO_DISCOVERY_RETRIES |
 931                         MPATH_INFO_FLAGS;
 932
 933         pinfo->frame_qlen = mpath->frame_queue.qlen;
 934         pinfo->dsn = mpath->dsn;
 935         pinfo->metric = mpath->metric;
 936         if (time_before(jiffies, mpath->exp_time))
 937                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 938         pinfo->discovery_timeout =
 939                         jiffies_to_msecs(mpath->discovery_timeout);
 940         pinfo->discovery_retries = mpath->discovery_retries;
 941         pinfo->flags = 0;
 942         if (mpath->flags & MESH_PATH_ACTIVE)
 943                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 944         if (mpath->flags & MESH_PATH_RESOLVING)
 945                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 946         if (mpath->flags & MESH_PATH_DSN_VALID)
 947                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 948         if (mpath->flags & MESH_PATH_FIXED)
 949                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 950         if (mpath->flags & MESH_PATH_RESOLVING)
 951                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 952
 953         pinfo->flags = mpath->flags;
 954 }
 955
 956 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 957                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 958
 959 {
 960         struct ieee80211_local *local = wiphy_priv(wiphy);
 961         struct ieee80211_sub_if_data *sdata;
 962         struct mesh_path *mpath;
 963
 964         if (dev == local->mdev)
 965                 return -EOPNOTSUPP;
 966
 967         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 968
 969         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 970                 return -ENOTSUPP;
 971
 972         rcu_read_lock();
 973         mpath = mesh_path_lookup(dst, sdata);
 974         if (!mpath) {
 975                 rcu_read_unlock();
 976                 return -ENOENT;
 977         }
 978         memcpy(dst, mpath->dst, ETH_ALEN);
 979         mpath_set_pinfo(mpath, next_hop, pinfo);
 980         rcu_read_unlock();
 981         return 0;
 982 }
 983
 984 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 985                                  int idx, u8 *dst, u8 *next_hop,
 986                                  struct mpath_info *pinfo)
 987 {
 988         struct ieee80211_local *local = wiphy_priv(wiphy);
 989         struct ieee80211_sub_if_data *sdata;
 990         struct mesh_path *mpath;
 991
 992         if (dev == local->mdev)
 993                 return -EOPNOTSUPP;
 994
 995         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 996
 997         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 998                 return -ENOTSUPP;
 999
1000         rcu_read_lock();
1001         mpath = mesh_path_lookup_by_idx(idx, sdata);
1002         if (!mpath) {
1003                 rcu_read_unlock();
1004                 return -ENOENT;
1005         }
1006         memcpy(dst, mpath->dst, ETH_ALEN);
1007         mpath_set_pinfo(mpath, next_hop, pinfo);
1008         rcu_read_unlock();
1009         return 0;
1010 }
1011 #endif
1012
1013 struct cfg80211_ops mac80211_config_ops = {
1014         .add_virtual_intf = ieee80211_add_iface,
1015         .del_virtual_intf = ieee80211_del_iface,
1016         .change_virtual_intf = ieee80211_change_iface,
1017         .add_key = ieee80211_add_key,
1018         .del_key = ieee80211_del_key,
1019         .get_key = ieee80211_get_key,
1020         .set_default_key = ieee80211_config_default_key,
1021         .add_beacon = ieee80211_add_beacon,
1022         .set_beacon = ieee80211_set_beacon,
1023         .del_beacon = ieee80211_del_beacon,
1024         .add_station = ieee80211_add_station,
1025         .del_station = ieee80211_del_station,
1026         .change_station = ieee80211_change_station,
1027         .get_station = ieee80211_get_station,
1028         .dump_station = ieee80211_dump_station,
1029 #ifdef CONFIG_MAC80211_MESH
1030         .add_mpath = ieee80211_add_mpath,
1031         .del_mpath = ieee80211_del_mpath,
1032         .change_mpath = ieee80211_change_mpath,
1033         .get_mpath = ieee80211_get_mpath,
1034         .dump_mpath = ieee80211_dump_mpath,
1035 #endif
1036 };