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