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         default:
  37                 return IEEE80211_IF_TYPE_INVALID;
  38         }
  39 }
  40
  41 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
  42                                enum nl80211_iftype type, u32 *flags,
  43                                struct vif_params *params)
  44 {
  45         struct ieee80211_local *local = wiphy_priv(wiphy);
  46         enum ieee80211_if_types itype;
  47         struct net_device *dev;
  48         struct ieee80211_sub_if_data *sdata;
  49         int err;
  50
  51         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  52                 return -ENODEV;
  53
  54         itype = nl80211_type_to_mac80211_type(type);
  55         if (itype == IEEE80211_IF_TYPE_INVALID)
  56                 return -EINVAL;
  57
  58         err = ieee80211_if_add(local->mdev, name, &dev, itype, params);
  59         if (err || itype != IEEE80211_IF_TYPE_MNTR || !flags)
  60                 return err;
  61
  62         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  63         sdata->u.mntr_flags = *flags;
  64         return 0;
  65 }
  66
  67 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
  68 {
  69         struct ieee80211_local *local = wiphy_priv(wiphy);
  70         struct net_device *dev;
  71         char *name;
  72
  73         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  74                 return -ENODEV;
  75
  76         /* we're under RTNL */
  77         dev = __dev_get_by_index(&init_net, ifindex);
  78         if (!dev)
  79                 return 0;
  80
  81         name = dev->name;
  82
  83         return ieee80211_if_remove(local->mdev, name, -1);
  84 }
  85
  86 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
  87                                   enum nl80211_iftype type, u32 *flags,
  88                                   struct vif_params *params)
  89 {
  90         struct ieee80211_local *local = wiphy_priv(wiphy);
  91         struct net_device *dev;
  92         enum ieee80211_if_types itype;
  93         struct ieee80211_sub_if_data *sdata;
  94
  95         if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
  96                 return -ENODEV;
  97
  98         /* we're under RTNL */
  99         dev = __dev_get_by_index(&init_net, ifindex);
 100         if (!dev)
 101                 return -ENODEV;
 102
 103         if (netif_running(dev))
 104                 return -EBUSY;
 105
 106         itype = nl80211_type_to_mac80211_type(type);
 107         if (itype == IEEE80211_IF_TYPE_INVALID)
 108                 return -EINVAL;
 109
 110         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 111
 112         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
 113                 return -EOPNOTSUPP;
 114
 115         ieee80211_if_reinit(dev);
 116         ieee80211_if_set_type(dev, itype);
 117
 118         if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
 119                 ieee80211_if_sta_set_mesh_id(&sdata->u.sta,
 120                                              params->mesh_id_len,
 121                                              params->mesh_id);
 122
 123         if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || !flags)
 124                 return 0;
 125
 126         sdata->u.mntr_flags = *flags;
 127         return 0;
 128 }
 129
 130 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 131                              u8 key_idx, u8 *mac_addr,
 132                              struct key_params *params)
 133 {
 134         struct ieee80211_sub_if_data *sdata;
 135         struct sta_info *sta = NULL;
 136         enum ieee80211_key_alg alg;
 137         struct ieee80211_key *key;
 138         int err;
 139
 140         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 141
 142         switch (params->cipher) {
 143         case WLAN_CIPHER_SUITE_WEP40:
 144         case WLAN_CIPHER_SUITE_WEP104:
 145                 alg = ALG_WEP;
 146                 break;
 147         case WLAN_CIPHER_SUITE_TKIP:
 148                 alg = ALG_TKIP;
 149                 break;
 150         case WLAN_CIPHER_SUITE_CCMP:
 151                 alg = ALG_CCMP;
 152                 break;
 153         default:
 154                 return -EINVAL;
 155         }
 156
 157         key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
 158         if (!key)
 159                 return -ENOMEM;
 160
 161         rcu_read_lock();
 162
 163         if (mac_addr) {
 164                 sta = sta_info_get(sdata->local, mac_addr);
 165                 if (!sta) {
 166                         ieee80211_key_free(key);
 167                         err = -ENOENT;
 168                         goto out_unlock;
 169                 }
 170         }
 171
 172         ieee80211_key_link(key, sdata, sta);
 173
 174         err = 0;
 175  out_unlock:
 176         rcu_read_unlock();
 177
 178         return err;
 179 }
 180
 181 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 182                              u8 key_idx, u8 *mac_addr)
 183 {
 184         struct ieee80211_sub_if_data *sdata;
 185         struct sta_info *sta;
 186         int ret;
 187
 188         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 189
 190         rcu_read_lock();
 191
 192         if (mac_addr) {
 193                 ret = -ENOENT;
 194
 195                 sta = sta_info_get(sdata->local, mac_addr);
 196                 if (!sta)
 197                         goto out_unlock;
 198
 199                 if (sta->key) {
 200                         ieee80211_key_free(sta->key);
 201                         WARN_ON(sta->key);
 202                         ret = 0;
 203                 }
 204
 205                 goto out_unlock;
 206         }
 207
 208         if (!sdata->keys[key_idx]) {
 209                 ret = -ENOENT;
 210                 goto out_unlock;
 211         }
 212
 213         ieee80211_key_free(sdata->keys[key_idx]);
 214         WARN_ON(sdata->keys[key_idx]);
 215
 216         ret = 0;
 217  out_unlock:
 218         rcu_read_unlock();
 219
 220         return ret;
 221 }
 222
 223 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 224                              u8 key_idx, u8 *mac_addr, void *cookie,
 225                              void (*callback)(void *cookie,
 226                                               struct key_params *params))
 227 {
 228         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 229         struct sta_info *sta = NULL;
 230         u8 seq[6] = {0};
 231         struct key_params params;
 232         struct ieee80211_key *key;
 233         u32 iv32;
 234         u16 iv16;
 235         int err = -ENOENT;
 236
 237         rcu_read_lock();
 238
 239         if (mac_addr) {
 240                 sta = sta_info_get(sdata->local, mac_addr);
 241                 if (!sta)
 242                         goto out;
 243
 244                 key = sta->key;
 245         } else
 246                 key = sdata->keys[key_idx];
 247
 248         if (!key)
 249                 goto out;
 250
 251         memset(&params, 0, sizeof(params));
 252
 253         switch (key->conf.alg) {
 254         case ALG_TKIP:
 255                 params.cipher = WLAN_CIPHER_SUITE_TKIP;
 256
 257                 iv32 = key->u.tkip.iv32;
 258                 iv16 = key->u.tkip.iv16;
 259
 260                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
 261                     sdata->local->ops->get_tkip_seq)
 262                         sdata->local->ops->get_tkip_seq(
 263                                 local_to_hw(sdata->local),
 264                                 key->conf.hw_key_idx,
 265                                 &iv32, &iv16);
 266
 267                 seq[0] = iv16 & 0xff;
 268                 seq[1] = (iv16 >> 8) & 0xff;
 269                 seq[2] = iv32 & 0xff;
 270                 seq[3] = (iv32 >> 8) & 0xff;
 271                 seq[4] = (iv32 >> 16) & 0xff;
 272                 seq[5] = (iv32 >> 24) & 0xff;
 273                 params.seq = seq;
 274                 params.seq_len = 6;
 275                 break;
 276         case ALG_CCMP:
 277                 params.cipher = WLAN_CIPHER_SUITE_CCMP;
 278                 seq[0] = key->u.ccmp.tx_pn[5];
 279                 seq[1] = key->u.ccmp.tx_pn[4];
 280                 seq[2] = key->u.ccmp.tx_pn[3];
 281                 seq[3] = key->u.ccmp.tx_pn[2];
 282                 seq[4] = key->u.ccmp.tx_pn[1];
 283                 seq[5] = key->u.ccmp.tx_pn[0];
 284                 params.seq = seq;
 285                 params.seq_len = 6;
 286                 break;
 287         case ALG_WEP:
 288                 if (key->conf.keylen == 5)
 289                         params.cipher = WLAN_CIPHER_SUITE_WEP40;
 290                 else
 291                         params.cipher = WLAN_CIPHER_SUITE_WEP104;
 292                 break;
 293         }
 294
 295         params.key = key->conf.key;
 296         params.key_len = key->conf.keylen;
 297
 298         callback(cookie, &params);
 299         err = 0;
 300
 301  out:
 302         rcu_read_unlock();
 303         return err;
 304 }
 305
 306 static int ieee80211_config_default_key(struct wiphy *wiphy,
 307                                         struct net_device *dev,
 308                                         u8 key_idx)
 309 {
 310         struct ieee80211_sub_if_data *sdata;
 311
 312         rcu_read_lock();
 313
 314         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 315         ieee80211_set_default_key(sdata, key_idx);
 316
 317         rcu_read_unlock();
 318
 319         return 0;
 320 }
 321
 322 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 323 {
 324         struct ieee80211_sub_if_data *sdata = sta->sdata;
 325
 326         sinfo->filled = STATION_INFO_INACTIVE_TIME |
 327                         STATION_INFO_RX_BYTES |
 328                         STATION_INFO_TX_BYTES;
 329
 330         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
 331         sinfo->rx_bytes = sta->rx_bytes;
 332         sinfo->tx_bytes = sta->tx_bytes;
 333
 334         if (ieee80211_vif_is_mesh(&sdata->vif)) {
 335 #ifdef CONFIG_MAC80211_MESH
 336                 sinfo->filled |= STATION_INFO_LLID |
 337                                  STATION_INFO_PLID |
 338                                  STATION_INFO_PLINK_STATE;
 339
 340                 sinfo->llid = le16_to_cpu(sta->llid);
 341                 sinfo->plid = le16_to_cpu(sta->plid);
 342                 sinfo->plink_state = sta->plink_state;
 343 #endif
 344         }
 345 }
 346
 347
 348 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 349                                  int idx, u8 *mac, struct station_info *sinfo)
 350 {
 351         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 352         struct sta_info *sta;
 353         int ret = -ENOENT;
 354
 355         rcu_read_lock();
 356
 357         sta = sta_info_get_by_idx(local, idx, dev);
 358         if (sta) {
 359                 ret = 0;
 360                 memcpy(mac, sta->addr, ETH_ALEN);
 361                 sta_set_sinfo(sta, sinfo);
 362         }
 363
 364         rcu_read_unlock();
 365
 366         return ret;
 367 }
 368
 369 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
 370                                  u8 *mac, struct station_info *sinfo)
 371 {
 372         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 373         struct sta_info *sta;
 374         int ret = -ENOENT;
 375
 376         rcu_read_lock();
 377
 378         /* XXX: verify sta->dev == dev */
 379
 380         sta = sta_info_get(local, mac);
 381         if (sta) {
 382                 ret = 0;
 383                 sta_set_sinfo(sta, sinfo);
 384         }
 385
 386         rcu_read_unlock();
 387
 388         return ret;
 389 }
 390
 391 /*
 392  * This handles both adding a beacon and setting new beacon info
 393  */
 394 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
 395                                    struct beacon_parameters *params)
 396 {
 397         struct beacon_data *new, *old;
 398         int new_head_len, new_tail_len;
 399         int size;
 400         int err = -EINVAL;
 401
 402         old = sdata->u.ap.beacon;
 403
 404         /* head must not be zero-length */
 405         if (params->head && !params->head_len)
 406                 return -EINVAL;
 407
 408         /*
 409          * This is a kludge. beacon interval should really be part
 410          * of the beacon information.
 411          */
 412         if (params->interval) {
 413                 sdata->local->hw.conf.beacon_int = params->interval;
 414                 if (ieee80211_hw_config(sdata->local))
 415                         return -EINVAL;
 416                 /*
 417                  * We updated some parameter so if below bails out
 418                  * it's not an error.
 419                  */
 420                 err = 0;
 421         }
 422
 423         /* Need to have a beacon head if we don't have one yet */
 424         if (!params->head && !old)
 425                 return err;
 426
 427         /* sorry, no way to start beaconing without dtim period */
 428         if (!params->dtim_period && !old)
 429                 return err;
 430
 431         /* new or old head? */
 432         if (params->head)
 433                 new_head_len = params->head_len;
 434         else
 435                 new_head_len = old->head_len;
 436
 437         /* new or old tail? */
 438         if (params->tail || !old)
 439                 /* params->tail_len will be zero for !params->tail */
 440                 new_tail_len = params->tail_len;
 441         else
 442                 new_tail_len = old->tail_len;
 443
 444         size = sizeof(*new) + new_head_len + new_tail_len;
 445
 446         new = kzalloc(size, GFP_KERNEL);
 447         if (!new)
 448                 return -ENOMEM;
 449
 450         /* start filling the new info now */
 451
 452         /* new or old dtim period? */
 453         if (params->dtim_period)
 454                 new->dtim_period = params->dtim_period;
 455         else
 456                 new->dtim_period = old->dtim_period;
 457
 458         /*
 459          * pointers go into the block we allocated,
 460          * memory is | beacon_data | head | tail |
 461          */
 462         new->head = ((u8 *) new) + sizeof(*new);
 463         new->tail = new->head + new_head_len;
 464         new->head_len = new_head_len;
 465         new->tail_len = new_tail_len;
 466
 467         /* copy in head */
 468         if (params->head)
 469                 memcpy(new->head, params->head, new_head_len);
 470         else
 471                 memcpy(new->head, old->head, new_head_len);
 472
 473         /* copy in optional tail */
 474         if (params->tail)
 475                 memcpy(new->tail, params->tail, new_tail_len);
 476         else
 477                 if (old)
 478                         memcpy(new->tail, old->tail, new_tail_len);
 479
 480         rcu_assign_pointer(sdata->u.ap.beacon, new);
 481
 482         synchronize_rcu();
 483
 484         kfree(old);
 485
 486         return ieee80211_if_config_beacon(sdata->dev);
 487 }
 488
 489 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 490                                 struct beacon_parameters *params)
 491 {
 492         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 493         struct beacon_data *old;
 494
 495         if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 496                 return -EINVAL;
 497
 498         old = sdata->u.ap.beacon;
 499
 500         if (old)
 501                 return -EALREADY;
 502
 503         return ieee80211_config_beacon(sdata, params);
 504 }
 505
 506 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 507                                 struct beacon_parameters *params)
 508 {
 509         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 510         struct beacon_data *old;
 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 -ENOENT;
 519
 520         return ieee80211_config_beacon(sdata, params);
 521 }
 522
 523 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 524 {
 525         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 526         struct beacon_data *old;
 527
 528         if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
 529                 return -EINVAL;
 530
 531         old = sdata->u.ap.beacon;
 532
 533         if (!old)
 534                 return -ENOENT;
 535
 536         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 537         synchronize_rcu();
 538         kfree(old);
 539
 540         return ieee80211_if_config_beacon(dev);
 541 }
 542
 543 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
 544 struct iapp_layer2_update {
 545         u8 da[ETH_ALEN];        /* broadcast */
 546         u8 sa[ETH_ALEN];        /* STA addr */
 547         __be16 len;             /* 6 */
 548         u8 dsap;                /* 0 */
 549         u8 ssap;                /* 0 */
 550         u8 control;
 551         u8 xid_info[3];
 552 } __attribute__ ((packed));
 553
 554 static void ieee80211_send_layer2_update(struct sta_info *sta)
 555 {
 556         struct iapp_layer2_update *msg;
 557         struct sk_buff *skb;
 558
 559         /* Send Level 2 Update Frame to update forwarding tables in layer 2
 560          * bridge devices */
 561
 562         skb = dev_alloc_skb(sizeof(*msg));
 563         if (!skb)
 564                 return;
 565         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
 566
 567         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
 568          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 569
 570         memset(msg->da, 0xff, ETH_ALEN);
 571         memcpy(msg->sa, sta->addr, ETH_ALEN);
 572         msg->len = htons(6);
 573         msg->dsap = 0;
 574         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
 575         msg->control = 0xaf;    /* XID response lsb.1111F101.
 576                                  * F=0 (no poll command; unsolicited frame) */
 577         msg->xid_info[0] = 0x81;        /* XID format identifier */
 578         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
 579         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
 580
 581         skb->dev = sta->sdata->dev;
 582         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
 583         memset(skb->cb, 0, sizeof(skb->cb));
 584         netif_rx(skb);
 585 }
 586
 587 static void sta_apply_parameters(struct ieee80211_local *local,
 588                                  struct sta_info *sta,
 589                                  struct station_parameters *params)
 590 {
 591         u32 rates;
 592         int i, j;
 593         struct ieee80211_supported_band *sband;
 594         struct ieee80211_sub_if_data *sdata = sta->sdata;
 595
 596         /*
 597          * FIXME: updating the flags is racy when this function is
 598          *        called from ieee80211_change_station(), this will
 599          *        be resolved in a future patch.
 600          */
 601
 602         if (params->station_flags & STATION_FLAG_CHANGED) {
 603                 sta->flags &= ~WLAN_STA_AUTHORIZED;
 604                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
 605                         sta->flags |= WLAN_STA_AUTHORIZED;
 606
 607                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
 608                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
 609                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
 610
 611                 sta->flags &= ~WLAN_STA_WME;
 612                 if (params->station_flags & STATION_FLAG_WME)
 613                         sta->flags |= WLAN_STA_WME;
 614         }
 615
 616         /*
 617          * FIXME: updating the following information is racy when this
 618          *        function is called from ieee80211_change_station().
 619          *        However, all this information should be static so
 620          *        maybe we should just reject attemps to change it.
 621          */
 622
 623         if (params->aid) {
 624                 sta->aid = params->aid;
 625                 if (sta->aid > IEEE80211_MAX_AID)
 626                         sta->aid = 0; /* XXX: should this be an error? */
 627         }
 628
 629         if (params->listen_interval >= 0)
 630                 sta->listen_interval = params->listen_interval;
 631
 632         if (params->supported_rates) {
 633                 rates = 0;
 634                 sband = local->hw.wiphy->bands[local->oper_channel->band];
 635
 636                 for (i = 0; i < params->supported_rates_len; i++) {
 637                         int rate = (params->supported_rates[i] & 0x7f) * 5;
 638                         for (j = 0; j < sband->n_bitrates; j++) {
 639                                 if (sband->bitrates[j].bitrate == rate)
 640                                         rates |= BIT(j);
 641                         }
 642                 }
 643                 sta->supp_rates[local->oper_channel->band] = rates;
 644         }
 645
 646         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
 647                 switch (params->plink_action) {
 648                 case PLINK_ACTION_OPEN:
 649                         mesh_plink_open(sta);
 650                         break;
 651                 case PLINK_ACTION_BLOCK:
 652                         mesh_plink_block(sta);
 653                         break;
 654                 }
 655         }
 656 }
 657
 658 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
 659                                  u8 *mac, struct station_parameters *params)
 660 {
 661         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 662         struct sta_info *sta;
 663         struct ieee80211_sub_if_data *sdata;
 664         int err;
 665
 666         /* Prevent a race with changing the rate control algorithm */
 667         if (!netif_running(dev))
 668                 return -ENETDOWN;
 669
 670         if (params->vlan) {
 671                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 672
 673                 if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
 674                     sdata->vif.type != IEEE80211_IF_TYPE_AP)
 675                         return -EINVAL;
 676         } else
 677                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 678
 679         if (compare_ether_addr(mac, dev->dev_addr) == 0)
 680                 return -EINVAL;
 681
 682         if (is_multicast_ether_addr(mac))
 683                 return -EINVAL;
 684
 685         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
 686         if (!sta)
 687                 return -ENOMEM;
 688
 689         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
 690
 691         sta_apply_parameters(local, sta, params);
 692
 693         rate_control_rate_init(sta, local);
 694
 695         rcu_read_lock();
 696
 697         err = sta_info_insert(sta);
 698         if (err) {
 699                 /* STA has been freed */
 700                 rcu_read_unlock();
 701                 return err;
 702         }
 703
 704         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN ||
 705             sdata->vif.type == IEEE80211_IF_TYPE_AP)
 706                 ieee80211_send_layer2_update(sta);
 707
 708         rcu_read_unlock();
 709
 710         return 0;
 711 }
 712
 713 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
 714                                  u8 *mac)
 715 {
 716         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 717         struct ieee80211_local *local = sdata->local;
 718         struct sta_info *sta;
 719
 720         if (mac) {
 721                 /* XXX: get sta belonging to dev */
 722                 sta = sta_info_get(local, mac);
 723                 if (!sta)
 724                         return -ENOENT;
 725
 726                 sta_info_unlink(&sta);
 727                 sta_info_destroy(sta);
 728         } else
 729                 sta_info_flush(local, sdata);
 730
 731         return 0;
 732 }
 733
 734 static int ieee80211_change_station(struct wiphy *wiphy,
 735                                     struct net_device *dev,
 736                                     u8 *mac,
 737                                     struct station_parameters *params)
 738 {
 739         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 740         struct sta_info *sta;
 741         struct ieee80211_sub_if_data *vlansdata;
 742
 743         /* XXX: get sta belonging to dev */
 744         sta = sta_info_get(local, mac);
 745         if (!sta)
 746                 return -ENOENT;
 747
 748         if (params->vlan && params->vlan != sta->sdata->dev) {
 749                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 750
 751                 if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
 752                     vlansdata->vif.type != IEEE80211_IF_TYPE_AP)
 753                         return -EINVAL;
 754
 755                 sta->sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 756                 ieee80211_send_layer2_update(sta);
 757         }
 758
 759         sta_apply_parameters(local, sta, params);
 760
 761         return 0;
 762 }
 763
 764 #ifdef CONFIG_MAC80211_MESH
 765 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
 766                                  u8 *dst, u8 *next_hop)
 767 {
 768         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 769         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 770         struct mesh_path *mpath;
 771         struct sta_info *sta;
 772         int err;
 773
 774         if (!netif_running(dev))
 775                 return -ENETDOWN;
 776
 777         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 778                 return -ENOTSUPP;
 779
 780         rcu_read_lock();
 781         sta = sta_info_get(local, next_hop);
 782         if (!sta) {
 783                 rcu_read_unlock();
 784                 return -ENOENT;
 785         }
 786
 787         err = mesh_path_add(dst, dev);
 788         if (err) {
 789                 rcu_read_unlock();
 790                 return err;
 791         }
 792
 793         mpath = mesh_path_lookup(dst, dev);
 794         if (!mpath) {
 795                 rcu_read_unlock();
 796                 return -ENXIO;
 797         }
 798         mesh_path_fix_nexthop(mpath, sta);
 799
 800         rcu_read_unlock();
 801         return 0;
 802 }
 803
 804 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
 805                                  u8 *dst)
 806 {
 807         if (dst)
 808                 return mesh_path_del(dst, dev);
 809
 810         mesh_path_flush(dev);
 811         return 0;
 812 }
 813
 814 static int ieee80211_change_mpath(struct wiphy *wiphy,
 815                                     struct net_device *dev,
 816                                     u8 *dst, u8 *next_hop)
 817 {
 818         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 819         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 820         struct mesh_path *mpath;
 821         struct sta_info *sta;
 822
 823         if (!netif_running(dev))
 824                 return -ENETDOWN;
 825
 826         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 827                 return -ENOTSUPP;
 828
 829         rcu_read_lock();
 830
 831         sta = sta_info_get(local, next_hop);
 832         if (!sta) {
 833                 rcu_read_unlock();
 834                 return -ENOENT;
 835         }
 836
 837         mpath = mesh_path_lookup(dst, dev);
 838         if (!mpath) {
 839                 rcu_read_unlock();
 840                 return -ENOENT;
 841         }
 842
 843         mesh_path_fix_nexthop(mpath, sta);
 844
 845         rcu_read_unlock();
 846         return 0;
 847 }
 848
 849 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 850                             struct mpath_info *pinfo)
 851 {
 852         if (mpath->next_hop)
 853                 memcpy(next_hop, mpath->next_hop->addr, ETH_ALEN);
 854         else
 855                 memset(next_hop, 0, ETH_ALEN);
 856
 857         pinfo->filled = MPATH_INFO_FRAME_QLEN |
 858                         MPATH_INFO_DSN |
 859                         MPATH_INFO_METRIC |
 860                         MPATH_INFO_EXPTIME |
 861                         MPATH_INFO_DISCOVERY_TIMEOUT |
 862                         MPATH_INFO_DISCOVERY_RETRIES |
 863                         MPATH_INFO_FLAGS;
 864
 865         pinfo->frame_qlen = mpath->frame_queue.qlen;
 866         pinfo->dsn = mpath->dsn;
 867         pinfo->metric = mpath->metric;
 868         if (time_before(jiffies, mpath->exp_time))
 869                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
 870         pinfo->discovery_timeout =
 871                         jiffies_to_msecs(mpath->discovery_timeout);
 872         pinfo->discovery_retries = mpath->discovery_retries;
 873         pinfo->flags = 0;
 874         if (mpath->flags & MESH_PATH_ACTIVE)
 875                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
 876         if (mpath->flags & MESH_PATH_RESOLVING)
 877                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 878         if (mpath->flags & MESH_PATH_DSN_VALID)
 879                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
 880         if (mpath->flags & MESH_PATH_FIXED)
 881                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
 882         if (mpath->flags & MESH_PATH_RESOLVING)
 883                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
 884
 885         pinfo->flags = mpath->flags;
 886 }
 887
 888 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
 889                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
 890
 891 {
 892         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 893         struct mesh_path *mpath;
 894
 895         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 896                 return -ENOTSUPP;
 897
 898         rcu_read_lock();
 899         mpath = mesh_path_lookup(dst, dev);
 900         if (!mpath) {
 901                 rcu_read_unlock();
 902                 return -ENOENT;
 903         }
 904         memcpy(dst, mpath->dst, ETH_ALEN);
 905         mpath_set_pinfo(mpath, next_hop, pinfo);
 906         rcu_read_unlock();
 907         return 0;
 908 }
 909
 910 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
 911                                  int idx, u8 *dst, u8 *next_hop,
 912                                  struct mpath_info *pinfo)
 913 {
 914         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 915         struct mesh_path *mpath;
 916
 917         if (sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)
 918                 return -ENOTSUPP;
 919
 920         rcu_read_lock();
 921         mpath = mesh_path_lookup_by_idx(idx, dev);
 922         if (!mpath) {
 923                 rcu_read_unlock();
 924                 return -ENOENT;
 925         }
 926         memcpy(dst, mpath->dst, ETH_ALEN);
 927         mpath_set_pinfo(mpath, next_hop, pinfo);
 928         rcu_read_unlock();
 929         return 0;
 930 }
 931 #endif
 932
 933 struct cfg80211_ops mac80211_config_ops = {
 934         .add_virtual_intf = ieee80211_add_iface,
 935         .del_virtual_intf = ieee80211_del_iface,
 936         .change_virtual_intf = ieee80211_change_iface,
 937         .add_key = ieee80211_add_key,
 938         .del_key = ieee80211_del_key,
 939         .get_key = ieee80211_get_key,
 940         .set_default_key = ieee80211_config_default_key,
 941         .add_beacon = ieee80211_add_beacon,
 942         .set_beacon = ieee80211_set_beacon,
 943         .del_beacon = ieee80211_del_beacon,
 944         .add_station = ieee80211_add_station,
 945         .del_station = ieee80211_del_station,
 946         .change_station = ieee80211_change_station,
 947         .get_station = ieee80211_get_station,
 948         .dump_station = ieee80211_dump_station,
 949 #ifdef CONFIG_MAC80211_MESH
 950         .add_mpath = ieee80211_add_mpath,
 951         .del_mpath = ieee80211_del_mpath,
 952         .change_mpath = ieee80211_change_mpath,
 953         .get_mpath = ieee80211_get_mpath,
 954         .dump_mpath = ieee80211_dump_mpath,
 955 #endif
 956 };