net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_i.h"
  28 #include "ieee80211_rate.h"
  29 #include "wep.h"
  30 #include "wme.h"
  31 #include "aes_ccm.h"
  32 #include "ieee80211_led.h"
  33 #include "cfg.h"
  34 #include "debugfs.h"
  35 #include "debugfs_netdev.h"
  36
  37 #define SUPP_MCS_SET_LEN 16
  38
  39 /*
  40  * For seeing transmitted packets on monitor interfaces
  41  * we have a radiotap header too.
  42  */
  43 struct ieee80211_tx_status_rtap_hdr {
  44         struct ieee80211_radiotap_header hdr;
  45         __le16 tx_flags;
  46         u8 data_retries;
  47 } __attribute__ ((packed));
  48
  49 /* common interface routines */
  50
  51 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  52 {
  53         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  54         return ETH_ALEN;
  55 }
  56
  57 /* must be called under mdev tx lock */
  58 static void ieee80211_configure_filter(struct ieee80211_local *local)
  59 {
  60         unsigned int changed_flags;
  61         unsigned int new_flags = 0;
  62
  63         if (atomic_read(&local->iff_promiscs))
  64                 new_flags |= FIF_PROMISC_IN_BSS;
  65
  66         if (atomic_read(&local->iff_allmultis))
  67                 new_flags |= FIF_ALLMULTI;
  68
  69         if (local->monitors)
  70                 new_flags |= FIF_CONTROL |
  71                              FIF_OTHER_BSS |
  72                              FIF_BCN_PRBRESP_PROMISC;
  73
  74         changed_flags = local->filter_flags ^ new_flags;
  75
  76         /* be a bit nasty */
  77         new_flags |= (1<<31);
  78
  79         local->ops->configure_filter(local_to_hw(local),
  80                                      changed_flags, &new_flags,
  81                                      local->mdev->mc_count,
  82                                      local->mdev->mc_list);
  83
  84         WARN_ON(new_flags & (1<<31));
  85
  86         local->filter_flags = new_flags & ~(1<<31);
  87 }
  88
  89 /* master interface */
  90
  91 static int ieee80211_master_open(struct net_device *dev)
  92 {
  93         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  94         struct ieee80211_sub_if_data *sdata;
  95         int res = -EOPNOTSUPP;
  96
  97         /* we hold the RTNL here so can safely walk the list */
  98         list_for_each_entry(sdata, &local->interfaces, list) {
  99                 if (sdata->dev != dev && netif_running(sdata->dev)) {
 100                         res = 0;
 101                         break;
 102                 }
 103         }
 104         return res;
 105 }
 106
 107 static int ieee80211_master_stop(struct net_device *dev)
 108 {
 109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 110         struct ieee80211_sub_if_data *sdata;
 111
 112         /* we hold the RTNL here so can safely walk the list */
 113         list_for_each_entry(sdata, &local->interfaces, list)
 114                 if (sdata->dev != dev && netif_running(sdata->dev))
 115                         dev_close(sdata->dev);
 116
 117         return 0;
 118 }
 119
 120 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 121 {
 122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 123
 124         ieee80211_configure_filter(local);
 125 }
 126
 127 /* regular interfaces */
 128
 129 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 130 {
 131         /* FIX: what would be proper limits for MTU?
 132          * This interface uses 802.3 frames. */
 133         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 134                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 135                        dev->name, new_mtu);
 136                 return -EINVAL;
 137         }
 138
 139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 140         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 141 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 142         dev->mtu = new_mtu;
 143         return 0;
 144 }
 145
 146 static inline int identical_mac_addr_allowed(int type1, int type2)
 147 {
 148         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 149                 type2 == IEEE80211_IF_TYPE_MNTR ||
 150                 (type1 == IEEE80211_IF_TYPE_AP &&
 151                  type2 == IEEE80211_IF_TYPE_WDS) ||
 152                 (type1 == IEEE80211_IF_TYPE_WDS &&
 153                  (type2 == IEEE80211_IF_TYPE_WDS ||
 154                   type2 == IEEE80211_IF_TYPE_AP)) ||
 155                 (type1 == IEEE80211_IF_TYPE_AP &&
 156                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 157                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 158                  (type2 == IEEE80211_IF_TYPE_AP ||
 159                   type2 == IEEE80211_IF_TYPE_VLAN)));
 160 }
 161
 162 static int ieee80211_open(struct net_device *dev)
 163 {
 164         struct ieee80211_sub_if_data *sdata, *nsdata;
 165         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 166         struct ieee80211_if_init_conf conf;
 167         int res;
 168
 169         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 170
 171         /* we hold the RTNL here so can safely walk the list */
 172         list_for_each_entry(nsdata, &local->interfaces, list) {
 173                 struct net_device *ndev = nsdata->dev;
 174
 175                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 176                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
 177                         /*
 178                          * check whether it may have the same address
 179                          */
 180                         if (!identical_mac_addr_allowed(sdata->type,
 181                                                         nsdata->type))
 182                                 return -ENOTUNIQ;
 183
 184                         /*
 185                          * can only add VLANs to enabled APs
 186                          */
 187                         if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
 188                             nsdata->type == IEEE80211_IF_TYPE_AP &&
 189                             netif_running(nsdata->dev))
 190                                 sdata->u.vlan.ap = nsdata;
 191                 }
 192         }
 193
 194         switch (sdata->type) {
 195         case IEEE80211_IF_TYPE_WDS:
 196                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
 197                         return -ENOLINK;
 198                 break;
 199         case IEEE80211_IF_TYPE_VLAN:
 200                 if (!sdata->u.vlan.ap)
 201                         return -ENOLINK;
 202                 break;
 203         case IEEE80211_IF_TYPE_AP:
 204         case IEEE80211_IF_TYPE_STA:
 205         case IEEE80211_IF_TYPE_MNTR:
 206         case IEEE80211_IF_TYPE_IBSS:
 207                 /* no special treatment */
 208                 break;
 209         case IEEE80211_IF_TYPE_INVALID:
 210                 /* cannot happen */
 211                 WARN_ON(1);
 212                 break;
 213         }
 214
 215         if (local->open_count == 0) {
 216                 res = 0;
 217                 if (local->ops->start)
 218                         res = local->ops->start(local_to_hw(local));
 219                 if (res)
 220                         return res;
 221                 ieee80211_hw_config(local);
 222         }
 223
 224         switch (sdata->type) {
 225         case IEEE80211_IF_TYPE_VLAN:
 226                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 227                 /* no need to tell driver */
 228                 break;
 229         case IEEE80211_IF_TYPE_MNTR:
 230                 /* must be before the call to ieee80211_configure_filter */
 231                 local->monitors++;
 232                 if (local->monitors == 1) {
 233                         netif_tx_lock_bh(local->mdev);
 234                         ieee80211_configure_filter(local);
 235                         netif_tx_unlock_bh(local->mdev);
 236
 237                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 238                 }
 239                 break;
 240         case IEEE80211_IF_TYPE_STA:
 241         case IEEE80211_IF_TYPE_IBSS:
 242                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 243                 /* fall through */
 244         default:
 245                 conf.if_id = dev->ifindex;
 246                 conf.type = sdata->type;
 247                 conf.mac_addr = dev->dev_addr;
 248                 res = local->ops->add_interface(local_to_hw(local), &conf);
 249                 if (res && !local->open_count && local->ops->stop)
 250                         local->ops->stop(local_to_hw(local));
 251                 if (res)
 252                         return res;
 253
 254                 ieee80211_if_config(dev);
 255                 ieee80211_reset_erp_info(dev);
 256                 ieee80211_enable_keys(sdata);
 257
 258                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
 259                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 260                         netif_carrier_off(dev);
 261                 else
 262                         netif_carrier_on(dev);
 263         }
 264
 265         if (local->open_count == 0) {
 266                 res = dev_open(local->mdev);
 267                 WARN_ON(res);
 268                 tasklet_enable(&local->tx_pending_tasklet);
 269                 tasklet_enable(&local->tasklet);
 270         }
 271
 272         /*
 273          * set_multicast_list will be invoked by the networking core
 274          * which will check whether any increments here were done in
 275          * error and sync them down to the hardware as filter flags.
 276          */
 277         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 278                 atomic_inc(&local->iff_allmultis);
 279
 280         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 281                 atomic_inc(&local->iff_promiscs);
 282
 283         local->open_count++;
 284
 285         netif_start_queue(dev);
 286
 287         return 0;
 288 }
 289
 290 static int ieee80211_stop(struct net_device *dev)
 291 {
 292         struct ieee80211_sub_if_data *sdata;
 293         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 294         struct ieee80211_if_init_conf conf;
 295         struct sta_info *sta;
 296         int i;
 297
 298         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 299
 300         list_for_each_entry(sta, &local->sta_list, list) {
 301                 for (i = 0; i <  STA_TID_NUM; i++)
 302                         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr,
 303                                                 i, WLAN_BACK_RECIPIENT,
 304                                                 WLAN_REASON_QSTA_LEAVE_QBSS);
 305         }
 306
 307         netif_stop_queue(dev);
 308
 309         /*
 310          * Don't count this interface for promisc/allmulti while it
 311          * is down. dev_mc_unsync() will invoke set_multicast_list
 312          * on the master interface which will sync these down to the
 313          * hardware as filter flags.
 314          */
 315         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 316                 atomic_dec(&local->iff_allmultis);
 317
 318         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 319                 atomic_dec(&local->iff_promiscs);
 320
 321         dev_mc_unsync(local->mdev, dev);
 322
 323         /* down all dependent devices, that is VLANs */
 324         if (sdata->type == IEEE80211_IF_TYPE_AP) {
 325                 struct ieee80211_sub_if_data *vlan, *tmp;
 326
 327                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 328                                          u.vlan.list)
 329                         dev_close(vlan->dev);
 330                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 331         }
 332
 333         local->open_count--;
 334
 335         switch (sdata->type) {
 336         case IEEE80211_IF_TYPE_VLAN:
 337                 list_del(&sdata->u.vlan.list);
 338                 sdata->u.vlan.ap = NULL;
 339                 /* no need to tell driver */
 340                 break;
 341         case IEEE80211_IF_TYPE_MNTR:
 342                 local->monitors--;
 343                 if (local->monitors == 0) {
 344                         netif_tx_lock_bh(local->mdev);
 345                         ieee80211_configure_filter(local);
 346                         netif_tx_unlock_bh(local->mdev);
 347
 348                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 349                 }
 350                 break;
 351         case IEEE80211_IF_TYPE_STA:
 352         case IEEE80211_IF_TYPE_IBSS:
 353                 sdata->u.sta.state = IEEE80211_DISABLED;
 354                 del_timer_sync(&sdata->u.sta.timer);
 355                 /*
 356                  * When we get here, the interface is marked down.
 357                  * Call synchronize_rcu() to wait for the RX path
 358                  * should it be using the interface and enqueuing
 359                  * frames at this very time on another CPU.
 360                  */
 361                 synchronize_rcu();
 362                 skb_queue_purge(&sdata->u.sta.skb_queue);
 363
 364                 if (local->scan_dev == sdata->dev) {
 365                         if (!local->ops->hw_scan) {
 366                                 local->sta_sw_scanning = 0;
 367                                 cancel_delayed_work(&local->scan_work);
 368                         } else
 369                                 local->sta_hw_scanning = 0;
 370                 }
 371
 372                 flush_workqueue(local->hw.workqueue);
 373
 374                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 375                 kfree(sdata->u.sta.extra_ie);
 376                 sdata->u.sta.extra_ie = NULL;
 377                 sdata->u.sta.extra_ie_len = 0;
 378                 /* fall through */
 379         default:
 380                 conf.if_id = dev->ifindex;
 381                 conf.type = sdata->type;
 382                 conf.mac_addr = dev->dev_addr;
 383                 /* disable all keys for as long as this netdev is down */
 384                 ieee80211_disable_keys(sdata);
 385                 local->ops->remove_interface(local_to_hw(local), &conf);
 386         }
 387
 388         if (local->open_count == 0) {
 389                 if (netif_running(local->mdev))
 390                         dev_close(local->mdev);
 391
 392                 if (local->ops->stop)
 393                         local->ops->stop(local_to_hw(local));
 394
 395                 tasklet_disable(&local->tx_pending_tasklet);
 396                 tasklet_disable(&local->tasklet);
 397         }
 398
 399         return 0;
 400 }
 401
 402 static void ieee80211_set_multicast_list(struct net_device *dev)
 403 {
 404         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 405         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 406         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 407
 408         allmulti = !!(dev->flags & IFF_ALLMULTI);
 409         promisc = !!(dev->flags & IFF_PROMISC);
 410         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 411         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 412
 413         if (allmulti != sdata_allmulti) {
 414                 if (dev->flags & IFF_ALLMULTI)
 415                         atomic_inc(&local->iff_allmultis);
 416                 else
 417                         atomic_dec(&local->iff_allmultis);
 418                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 419         }
 420
 421         if (promisc != sdata_promisc) {
 422                 if (dev->flags & IFF_PROMISC)
 423                         atomic_inc(&local->iff_promiscs);
 424                 else
 425                         atomic_dec(&local->iff_promiscs);
 426                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 427         }
 428
 429         dev_mc_sync(local->mdev, dev);
 430 }
 431
 432 static const struct header_ops ieee80211_header_ops = {
 433         .create         = eth_header,
 434         .parse          = header_parse_80211,
 435         .rebuild        = eth_rebuild_header,
 436         .cache          = eth_header_cache,
 437         .cache_update   = eth_header_cache_update,
 438 };
 439
 440 /* Must not be called for mdev */
 441 void ieee80211_if_setup(struct net_device *dev)
 442 {
 443         ether_setup(dev);
 444         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 445         dev->wireless_handlers = &ieee80211_iw_handler_def;
 446         dev->set_multicast_list = ieee80211_set_multicast_list;
 447         dev->change_mtu = ieee80211_change_mtu;
 448         dev->open = ieee80211_open;
 449         dev->stop = ieee80211_stop;
 450         dev->destructor = ieee80211_if_free;
 451 }
 452
 453 /* WDS specialties */
 454
 455 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 456 {
 457         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 458         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 459         struct sta_info *sta;
 460         DECLARE_MAC_BUF(mac);
 461
 462         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 463                 return 0;
 464
 465         /* Create STA entry for the new peer */
 466         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 467         if (!sta)
 468                 return -ENOMEM;
 469         sta_info_put(sta);
 470
 471         /* Remove STA entry for the old peer */
 472         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 473         if (sta) {
 474                 sta_info_free(sta);
 475                 sta_info_put(sta);
 476         } else {
 477                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 478                        "peer %s\n",
 479                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 480         }
 481
 482         /* Update WDS link data */
 483         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 484
 485         return 0;
 486 }
 487
 488 /* everything else */
 489
 490 static int __ieee80211_if_config(struct net_device *dev,
 491                                  struct sk_buff *beacon,
 492                                  struct ieee80211_tx_control *control)
 493 {
 494         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 495         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 496         struct ieee80211_if_conf conf;
 497
 498         if (!local->ops->config_interface || !netif_running(dev))
 499                 return 0;
 500
 501         memset(&conf, 0, sizeof(conf));
 502         conf.type = sdata->type;
 503         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 504             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 505                 conf.bssid = sdata->u.sta.bssid;
 506                 conf.ssid = sdata->u.sta.ssid;
 507                 conf.ssid_len = sdata->u.sta.ssid_len;
 508         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 509                 conf.ssid = sdata->u.ap.ssid;
 510                 conf.ssid_len = sdata->u.ap.ssid_len;
 511                 conf.beacon = beacon;
 512                 conf.beacon_control = control;
 513         }
 514         return local->ops->config_interface(local_to_hw(local),
 515                                            dev->ifindex, &conf);
 516 }
 517
 518 int ieee80211_if_config(struct net_device *dev)
 519 {
 520         return __ieee80211_if_config(dev, NULL, NULL);
 521 }
 522
 523 int ieee80211_if_config_beacon(struct net_device *dev)
 524 {
 525         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 526         struct ieee80211_tx_control control;
 527         struct sk_buff *skb;
 528
 529         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 530                 return 0;
 531         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 532         if (!skb)
 533                 return -ENOMEM;
 534         return __ieee80211_if_config(dev, skb, &control);
 535 }
 536
 537 int ieee80211_hw_config(struct ieee80211_local *local)
 538 {
 539         struct ieee80211_hw_mode *mode;
 540         struct ieee80211_channel *chan;
 541         int ret = 0;
 542
 543         if (local->sta_sw_scanning) {
 544                 chan = local->scan_channel;
 545                 mode = local->scan_hw_mode;
 546         } else {
 547                 chan = local->oper_channel;
 548                 mode = local->oper_hw_mode;
 549         }
 550
 551         local->hw.conf.channel = chan->chan;
 552         local->hw.conf.channel_val = chan->val;
 553         if (!local->hw.conf.power_level) {
 554                 local->hw.conf.power_level = chan->power_level;
 555         } else {
 556                 local->hw.conf.power_level = min(chan->power_level,
 557                                                  local->hw.conf.power_level);
 558         }
 559         local->hw.conf.freq = chan->freq;
 560         local->hw.conf.phymode = mode->mode;
 561         local->hw.conf.antenna_max = chan->antenna_max;
 562         local->hw.conf.chan = chan;
 563         local->hw.conf.mode = mode;
 564
 565 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 566         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 567                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 568                local->hw.conf.phymode);
 569 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 570
 571         if (local->open_count)
 572                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 573
 574         return ret;
 575 }
 576
 577 /**
 578  * ieee80211_hw_config_ht should be used only after legacy configuration
 579  * has been determined, as ht configuration depends upon the hardware's
 580  * HT abilities for a _specific_ band.
 581  */
 582 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 583                            struct ieee80211_ht_info *req_ht_cap,
 584                            struct ieee80211_ht_bss_info *req_bss_cap)
 585 {
 586         struct ieee80211_conf *conf = &local->hw.conf;
 587         struct ieee80211_hw_mode *mode = conf->mode;
 588         int i;
 589
 590         /* HT is not supported */
 591         if (!mode->ht_info.ht_supported) {
 592                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 593                 return -EOPNOTSUPP;
 594         }
 595
 596         /* disable HT */
 597         if (!enable_ht) {
 598                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 599         } else {
 600                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
 601                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
 602                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
 603                 conf->ht_conf.cap |=
 604                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
 605                 conf->ht_bss_conf.primary_channel =
 606                         req_bss_cap->primary_channel;
 607                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
 608                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
 609                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
 610                         conf->ht_conf.supp_mcs_set[i] =
 611                                 mode->ht_info.supp_mcs_set[i] &
 612                                   req_ht_cap->supp_mcs_set[i];
 613
 614                 /* In STA mode, this gives us indication
 615                  * to the AP's mode of operation */
 616                 conf->ht_conf.ht_supported = 1;
 617                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
 618                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
 619         }
 620
 621         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
 622
 623         return 0;
 624 }
 625
 626 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 627 {
 628         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 629         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 630         if (local->ops->erp_ie_changed)
 631                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 632                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 633                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 634 }
 635
 636 void ieee80211_reset_erp_info(struct net_device *dev)
 637 {
 638         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 639
 640         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 641                         IEEE80211_SDATA_SHORT_PREAMBLE);
 642         ieee80211_erp_info_change_notify(dev,
 643                                          IEEE80211_ERP_CHANGE_PROTECTION |
 644                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 645 }
 646
 647 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 648                                  struct sk_buff *skb,
 649                                  struct ieee80211_tx_status *status)
 650 {
 651         struct ieee80211_local *local = hw_to_local(hw);
 652         struct ieee80211_tx_status *saved;
 653         int tmp;
 654
 655         skb->dev = local->mdev;
 656         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 657         if (unlikely(!saved)) {
 658                 if (net_ratelimit())
 659                         printk(KERN_WARNING "%s: Not enough memory, "
 660                                "dropping tx status", skb->dev->name);
 661                 /* should be dev_kfree_skb_irq, but due to this function being
 662                  * named _irqsafe instead of just _irq we can't be sure that
 663                  * people won't call it from non-irq contexts */
 664                 dev_kfree_skb_any(skb);
 665                 return;
 666         }
 667         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 668         /* copy pointer to saved status into skb->cb for use by tasklet */
 669         memcpy(skb->cb, &saved, sizeof(saved));
 670
 671         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 672         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 673                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 674         tmp = skb_queue_len(&local->skb_queue) +
 675                 skb_queue_len(&local->skb_queue_unreliable);
 676         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 677                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 678                 memcpy(&saved, skb->cb, sizeof(saved));
 679                 kfree(saved);
 680                 dev_kfree_skb_irq(skb);
 681                 tmp--;
 682                 I802_DEBUG_INC(local->tx_status_drop);
 683         }
 684         tasklet_schedule(&local->tasklet);
 685 }
 686 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 687
 688 static void ieee80211_tasklet_handler(unsigned long data)
 689 {
 690         struct ieee80211_local *local = (struct ieee80211_local *) data;
 691         struct sk_buff *skb;
 692         struct ieee80211_rx_status rx_status;
 693         struct ieee80211_tx_status *tx_status;
 694
 695         while ((skb = skb_dequeue(&local->skb_queue)) ||
 696                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 697                 switch (skb->pkt_type) {
 698                 case IEEE80211_RX_MSG:
 699                         /* status is in skb->cb */
 700                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 701                         /* Clear skb->type in order to not confuse kernel
 702                          * netstack. */
 703                         skb->pkt_type = 0;
 704                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 705                         break;
 706                 case IEEE80211_TX_STATUS_MSG:
 707                         /* get pointer to saved status out of skb->cb */
 708                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 709                         skb->pkt_type = 0;
 710                         ieee80211_tx_status(local_to_hw(local),
 711                                             skb, tx_status);
 712                         kfree(tx_status);
 713                         break;
 714                 default: /* should never get here! */
 715                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 716                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 717                         dev_kfree_skb(skb);
 718                         break;
 719                 }
 720         }
 721 }
 722
 723 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 724  * make a prepared TX frame (one that has been given to hw) to look like brand
 725  * new IEEE 802.11 frame that is ready to go through TX processing again.
 726  * Also, tx_packet_data in cb is restored from tx_control. */
 727 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 728                                       struct ieee80211_key *key,
 729                                       struct sk_buff *skb,
 730                                       struct ieee80211_tx_control *control)
 731 {
 732         int hdrlen, iv_len, mic_len;
 733         struct ieee80211_tx_packet_data *pkt_data;
 734
 735         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 736         pkt_data->ifindex = control->ifindex;
 737         pkt_data->flags = 0;
 738         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 739                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 740         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 741                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 742         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 743                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 744         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 745                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 746         pkt_data->queue = control->queue;
 747
 748         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 749
 750         if (!key)
 751                 goto no_key;
 752
 753         switch (key->conf.alg) {
 754         case ALG_WEP:
 755                 iv_len = WEP_IV_LEN;
 756                 mic_len = WEP_ICV_LEN;
 757                 break;
 758         case ALG_TKIP:
 759                 iv_len = TKIP_IV_LEN;
 760                 mic_len = TKIP_ICV_LEN;
 761                 break;
 762         case ALG_CCMP:
 763                 iv_len = CCMP_HDR_LEN;
 764                 mic_len = CCMP_MIC_LEN;
 765                 break;
 766         default:
 767                 goto no_key;
 768         }
 769
 770         if (skb->len >= mic_len &&
 771             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 772                 skb_trim(skb, skb->len - mic_len);
 773         if (skb->len >= iv_len && skb->len > hdrlen) {
 774                 memmove(skb->data + iv_len, skb->data, hdrlen);
 775                 skb_pull(skb, iv_len);
 776         }
 777
 778 no_key:
 779         {
 780                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 781                 u16 fc = le16_to_cpu(hdr->frame_control);
 782                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 783                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 784                         hdr->frame_control = cpu_to_le16(fc);
 785                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 786                         skb_pull(skb, 2);
 787                 }
 788         }
 789 }
 790
 791 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 792                          struct ieee80211_tx_status *status)
 793 {
 794         struct sk_buff *skb2;
 795         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 796         struct ieee80211_local *local = hw_to_local(hw);
 797         u16 frag, type;
 798         struct ieee80211_tx_status_rtap_hdr *rthdr;
 799         struct ieee80211_sub_if_data *sdata;
 800         int monitors;
 801
 802         if (!status) {
 803                 printk(KERN_ERR
 804                        "%s: ieee80211_tx_status called with NULL status\n",
 805                        wiphy_name(local->hw.wiphy));
 806                 dev_kfree_skb(skb);
 807                 return;
 808         }
 809
 810         if (status->excessive_retries) {
 811                 struct sta_info *sta;
 812                 sta = sta_info_get(local, hdr->addr1);
 813                 if (sta) {
 814                         if (sta->flags & WLAN_STA_PS) {
 815                                 /* The STA is in power save mode, so assume
 816                                  * that this TX packet failed because of that.
 817                                  */
 818                                 status->excessive_retries = 0;
 819                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 820                         }
 821                         sta_info_put(sta);
 822                 }
 823         }
 824
 825         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 826                 struct sta_info *sta;
 827                 sta = sta_info_get(local, hdr->addr1);
 828                 if (sta) {
 829                         sta->tx_filtered_count++;
 830
 831                         /* Clear the TX filter mask for this STA when sending
 832                          * the next packet. If the STA went to power save mode,
 833                          * this will happen when it is waking up for the next
 834                          * time. */
 835                         sta->clear_dst_mask = 1;
 836
 837                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 838                          * the race between RX and TX status causing some
 839                          * packets to be filtered out before 80211.o gets an
 840                          * update for PS status? This seems to be the case, so
 841                          * no changes are likely to be needed. */
 842                         if (sta->flags & WLAN_STA_PS &&
 843                             skb_queue_len(&sta->tx_filtered) <
 844                             STA_MAX_TX_BUFFER) {
 845                                 ieee80211_remove_tx_extra(local, sta->key,
 846                                                           skb,
 847                                                           &status->control);
 848                                 skb_queue_tail(&sta->tx_filtered, skb);
 849                         } else if (!(sta->flags & WLAN_STA_PS) &&
 850                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 851                                 /* Software retry the packet once */
 852                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 853                                 ieee80211_remove_tx_extra(local, sta->key,
 854                                                           skb,
 855                                                           &status->control);
 856                                 dev_queue_xmit(skb);
 857                         } else {
 858                                 if (net_ratelimit()) {
 859                                         printk(KERN_DEBUG "%s: dropped TX "
 860                                                "filtered frame queue_len=%d "
 861                                                "PS=%d @%lu\n",
 862                                                wiphy_name(local->hw.wiphy),
 863                                                skb_queue_len(
 864                                                        &sta->tx_filtered),
 865                                                !!(sta->flags & WLAN_STA_PS),
 866                                                jiffies);
 867                                 }
 868                                 dev_kfree_skb(skb);
 869                         }
 870                         sta_info_put(sta);
 871                         return;
 872                 }
 873         } else
 874                 rate_control_tx_status(local->mdev, skb, status);
 875
 876         ieee80211_led_tx(local, 0);
 877
 878         /* SNMP counters
 879          * Fragments are passed to low-level drivers as separate skbs, so these
 880          * are actually fragments, not frames. Update frame counters only for
 881          * the first fragment of the frame. */
 882
 883         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 884         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 885
 886         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 887                 if (frag == 0) {
 888                         local->dot11TransmittedFrameCount++;
 889                         if (is_multicast_ether_addr(hdr->addr1))
 890                                 local->dot11MulticastTransmittedFrameCount++;
 891                         if (status->retry_count > 0)
 892                                 local->dot11RetryCount++;
 893                         if (status->retry_count > 1)
 894                                 local->dot11MultipleRetryCount++;
 895                 }
 896
 897                 /* This counter shall be incremented for an acknowledged MPDU
 898                  * with an individual address in the address 1 field or an MPDU
 899                  * with a multicast address in the address 1 field of type Data
 900                  * or Management. */
 901                 if (!is_multicast_ether_addr(hdr->addr1) ||
 902                     type == IEEE80211_FTYPE_DATA ||
 903                     type == IEEE80211_FTYPE_MGMT)
 904                         local->dot11TransmittedFragmentCount++;
 905         } else {
 906                 if (frag == 0)
 907                         local->dot11FailedCount++;
 908         }
 909
 910         /* this was a transmitted frame, but now we want to reuse it */
 911         skb_orphan(skb);
 912
 913         if (!local->monitors) {
 914                 dev_kfree_skb(skb);
 915                 return;
 916         }
 917
 918         /* send frame to monitor interfaces now */
 919
 920         if (skb_headroom(skb) < sizeof(*rthdr)) {
 921                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 922                 dev_kfree_skb(skb);
 923                 return;
 924         }
 925
 926         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 927                                 skb_push(skb, sizeof(*rthdr));
 928
 929         memset(rthdr, 0, sizeof(*rthdr));
 930         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 931         rthdr->hdr.it_present =
 932                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 933                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 934
 935         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 936             !is_multicast_ether_addr(hdr->addr1))
 937                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 938
 939         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 940             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 941                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 942         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 943                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 944
 945         rthdr->data_retries = status->retry_count;
 946
 947         rcu_read_lock();
 948         monitors = local->monitors;
 949         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 950                 /*
 951                  * Using the monitors counter is possibly racy, but
 952                  * if the value is wrong we simply either clone the skb
 953                  * once too much or forget sending it to one monitor iface
 954                  * The latter case isn't nice but fixing the race is much
 955                  * more complicated.
 956                  */
 957                 if (!monitors || !skb)
 958                         goto out;
 959
 960                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 961                         if (!netif_running(sdata->dev))
 962                                 continue;
 963                         monitors--;
 964                         if (monitors)
 965                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 966                         else
 967                                 skb2 = NULL;
 968                         skb->dev = sdata->dev;
 969                         /* XXX: is this sufficient for BPF? */
 970                         skb_set_mac_header(skb, 0);
 971                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 972                         skb->pkt_type = PACKET_OTHERHOST;
 973                         skb->protocol = htons(ETH_P_802_2);
 974                         memset(skb->cb, 0, sizeof(skb->cb));
 975                         netif_rx(skb);
 976                         skb = skb2;
 977                 }
 978         }
 979  out:
 980         rcu_read_unlock();
 981         if (skb)
 982                 dev_kfree_skb(skb);
 983 }
 984 EXPORT_SYMBOL(ieee80211_tx_status);
 985
 986 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 987                                         const struct ieee80211_ops *ops)
 988 {
 989         struct net_device *mdev;
 990         struct ieee80211_local *local;
 991         struct ieee80211_sub_if_data *sdata;
 992         int priv_size;
 993         struct wiphy *wiphy;
 994
 995         /* Ensure 32-byte alignment of our private data and hw private data.
 996          * We use the wiphy priv data for both our ieee80211_local and for
 997          * the driver's private data
 998          *
 999          * In memory it'll be like this:
1000          *
1001          * +-------------------------+
1002          * | struct wiphy           |
1003          * +-------------------------+
1004          * | struct ieee80211_local  |
1005          * +-------------------------+
1006          * | driver's private data   |
1007          * +-------------------------+
1008          *
1009          */
1010         priv_size = ((sizeof(struct ieee80211_local) +
1011                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1012                     priv_data_len;
1013
1014         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1015
1016         if (!wiphy)
1017                 return NULL;
1018
1019         wiphy->privid = mac80211_wiphy_privid;
1020
1021         local = wiphy_priv(wiphy);
1022         local->hw.wiphy = wiphy;
1023
1024         local->hw.priv = (char *)local +
1025                          ((sizeof(struct ieee80211_local) +
1026                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1027
1028         BUG_ON(!ops->tx);
1029         BUG_ON(!ops->start);
1030         BUG_ON(!ops->stop);
1031         BUG_ON(!ops->config);
1032         BUG_ON(!ops->add_interface);
1033         BUG_ON(!ops->remove_interface);
1034         BUG_ON(!ops->configure_filter);
1035         local->ops = ops;
1036
1037         /* for now, mdev needs sub_if_data :/ */
1038         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1039                             "wmaster%d", ether_setup);
1040         if (!mdev) {
1041                 wiphy_free(wiphy);
1042                 return NULL;
1043         }
1044
1045         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1046         mdev->ieee80211_ptr = &sdata->wdev;
1047         sdata->wdev.wiphy = wiphy;
1048
1049         local->hw.queues = 1; /* default */
1050
1051         local->mdev = mdev;
1052         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1053         local->rx_handlers = ieee80211_rx_handlers;
1054         local->tx_handlers = ieee80211_tx_handlers;
1055
1056         local->bridge_packets = 1;
1057
1058         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1059         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1060         local->short_retry_limit = 7;
1061         local->long_retry_limit = 4;
1062         local->hw.conf.radio_enabled = 1;
1063
1064         local->enabled_modes = ~0;
1065
1066         INIT_LIST_HEAD(&local->modes_list);
1067
1068         INIT_LIST_HEAD(&local->interfaces);
1069
1070         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1071         ieee80211_rx_bss_list_init(mdev);
1072
1073         sta_info_init(local);
1074
1075         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1076         mdev->open = ieee80211_master_open;
1077         mdev->stop = ieee80211_master_stop;
1078         mdev->type = ARPHRD_IEEE80211;
1079         mdev->header_ops = &ieee80211_header_ops;
1080         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1081
1082         sdata->type = IEEE80211_IF_TYPE_AP;
1083         sdata->dev = mdev;
1084         sdata->local = local;
1085         sdata->u.ap.force_unicast_rateidx = -1;
1086         sdata->u.ap.max_ratectrl_rateidx = -1;
1087         ieee80211_if_sdata_init(sdata);
1088         /* no RCU needed since we're still during init phase */
1089         list_add_tail(&sdata->list, &local->interfaces);
1090
1091         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1092                      (unsigned long)local);
1093         tasklet_disable(&local->tx_pending_tasklet);
1094
1095         tasklet_init(&local->tasklet,
1096                      ieee80211_tasklet_handler,
1097                      (unsigned long) local);
1098         tasklet_disable(&local->tasklet);
1099
1100         skb_queue_head_init(&local->skb_queue);
1101         skb_queue_head_init(&local->skb_queue_unreliable);
1102
1103         return local_to_hw(local);
1104 }
1105 EXPORT_SYMBOL(ieee80211_alloc_hw);
1106
1107 int ieee80211_register_hw(struct ieee80211_hw *hw)
1108 {
1109         struct ieee80211_local *local = hw_to_local(hw);
1110         const char *name;
1111         int result;
1112
1113         result = wiphy_register(local->hw.wiphy);
1114         if (result < 0)
1115                 return result;
1116
1117         name = wiphy_dev(local->hw.wiphy)->driver->name;
1118         local->hw.workqueue = create_singlethread_workqueue(name);
1119         if (!local->hw.workqueue) {
1120                 result = -ENOMEM;
1121                 goto fail_workqueue;
1122         }
1123
1124         /*
1125          * The hardware needs headroom for sending the frame,
1126          * and we need some headroom for passing the frame to monitor
1127          * interfaces, but never both at the same time.
1128          */
1129         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1130                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1131
1132         debugfs_hw_add(local);
1133
1134         local->hw.conf.beacon_int = 1000;
1135
1136         local->wstats_flags |= local->hw.max_rssi ?
1137                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1138         local->wstats_flags |= local->hw.max_signal ?
1139                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1140         local->wstats_flags |= local->hw.max_noise ?
1141                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1142         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1143                 local->wstats_flags |= IW_QUAL_DBM;
1144
1145         result = sta_info_start(local);
1146         if (result < 0)
1147                 goto fail_sta_info;
1148
1149         rtnl_lock();
1150         result = dev_alloc_name(local->mdev, local->mdev->name);
1151         if (result < 0)
1152                 goto fail_dev;
1153
1154         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1155         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1156
1157         result = register_netdevice(local->mdev);
1158         if (result < 0)
1159                 goto fail_dev;
1160
1161         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1162         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1163
1164         result = ieee80211_init_rate_ctrl_alg(local,
1165                                               hw->rate_control_algorithm);
1166         if (result < 0) {
1167                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1168                        "algorithm\n", wiphy_name(local->hw.wiphy));
1169                 goto fail_rate;
1170         }
1171
1172         result = ieee80211_wep_init(local);
1173
1174         if (result < 0) {
1175                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1176                        wiphy_name(local->hw.wiphy));
1177                 goto fail_wep;
1178         }
1179
1180         ieee80211_install_qdisc(local->mdev);
1181
1182         /* add one default STA interface */
1183         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1184                                   IEEE80211_IF_TYPE_STA);
1185         if (result)
1186                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1187                        wiphy_name(local->hw.wiphy));
1188
1189         local->reg_state = IEEE80211_DEV_REGISTERED;
1190         rtnl_unlock();
1191
1192         ieee80211_led_init(local);
1193
1194         return 0;
1195
1196 fail_wep:
1197         rate_control_deinitialize(local);
1198 fail_rate:
1199         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1200         unregister_netdevice(local->mdev);
1201 fail_dev:
1202         rtnl_unlock();
1203         sta_info_stop(local);
1204 fail_sta_info:
1205         debugfs_hw_del(local);
1206         destroy_workqueue(local->hw.workqueue);
1207 fail_workqueue:
1208         wiphy_unregister(local->hw.wiphy);
1209         return result;
1210 }
1211 EXPORT_SYMBOL(ieee80211_register_hw);
1212
1213 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1214                               struct ieee80211_hw_mode *mode)
1215 {
1216         struct ieee80211_local *local = hw_to_local(hw);
1217         struct ieee80211_rate *rate;
1218         int i;
1219
1220         INIT_LIST_HEAD(&mode->list);
1221         list_add_tail(&mode->list, &local->modes_list);
1222
1223         local->hw_modes |= (1 << mode->mode);
1224         for (i = 0; i < mode->num_rates; i++) {
1225                 rate = &(mode->rates[i]);
1226                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1227         }
1228         ieee80211_prepare_rates(local, mode);
1229
1230         if (!local->oper_hw_mode) {
1231                 /* Default to this mode */
1232                 local->hw.conf.phymode = mode->mode;
1233                 local->oper_hw_mode = local->scan_hw_mode = mode;
1234                 local->oper_channel = local->scan_channel = &mode->channels[0];
1235                 local->hw.conf.mode = local->oper_hw_mode;
1236                 local->hw.conf.chan = local->oper_channel;
1237         }
1238
1239         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1240                 ieee80211_set_default_regdomain(mode);
1241
1242         return 0;
1243 }
1244 EXPORT_SYMBOL(ieee80211_register_hwmode);
1245
1246 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1247 {
1248         struct ieee80211_local *local = hw_to_local(hw);
1249         struct ieee80211_sub_if_data *sdata, *tmp;
1250         int i;
1251
1252         tasklet_kill(&local->tx_pending_tasklet);
1253         tasklet_kill(&local->tasklet);
1254
1255         rtnl_lock();
1256
1257         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1258
1259         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1260
1261         /*
1262          * At this point, interface list manipulations are fine
1263          * because the driver cannot be handing us frames any
1264          * more and the tasklet is killed.
1265          */
1266
1267         /*
1268          * First, we remove all non-master interfaces. Do this because they
1269          * may have bss pointer dependency on the master, and when we free
1270          * the master these would be freed as well, breaking our list
1271          * iteration completely.
1272          */
1273         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1274                 if (sdata->dev == local->mdev)
1275                         continue;
1276                 list_del(&sdata->list);
1277                 __ieee80211_if_del(local, sdata);
1278         }
1279
1280         /* then, finally, remove the master interface */
1281         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1282
1283         rtnl_unlock();
1284
1285         ieee80211_rx_bss_list_deinit(local->mdev);
1286         ieee80211_clear_tx_pending(local);
1287         sta_info_stop(local);
1288         rate_control_deinitialize(local);
1289         debugfs_hw_del(local);
1290
1291         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1292                 kfree(local->supp_rates[i]);
1293                 kfree(local->basic_rates[i]);
1294         }
1295
1296         if (skb_queue_len(&local->skb_queue)
1297                         || skb_queue_len(&local->skb_queue_unreliable))
1298                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1299                        wiphy_name(local->hw.wiphy));
1300         skb_queue_purge(&local->skb_queue);
1301         skb_queue_purge(&local->skb_queue_unreliable);
1302
1303         destroy_workqueue(local->hw.workqueue);
1304         wiphy_unregister(local->hw.wiphy);
1305         ieee80211_wep_free(local);
1306         ieee80211_led_exit(local);
1307 }
1308 EXPORT_SYMBOL(ieee80211_unregister_hw);
1309
1310 void ieee80211_free_hw(struct ieee80211_hw *hw)
1311 {
1312         struct ieee80211_local *local = hw_to_local(hw);
1313
1314         ieee80211_if_free(local->mdev);
1315         wiphy_free(local->hw.wiphy);
1316 }
1317 EXPORT_SYMBOL(ieee80211_free_hw);
1318
1319 static int __init ieee80211_init(void)
1320 {
1321         struct sk_buff *skb;
1322         int ret;
1323
1324         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1325
1326         ret = rc80211_simple_init();
1327         if (ret)
1328                 goto fail;
1329
1330         ret = rc80211_pid_init();
1331         if (ret)
1332                 goto fail_simple;
1333
1334         ret = ieee80211_wme_register();
1335         if (ret) {
1336                 printk(KERN_DEBUG "ieee80211_init: failed to "
1337                        "initialize WME (err=%d)\n", ret);
1338                 goto fail_pid;
1339         }
1340
1341         ieee80211_debugfs_netdev_init();
1342         ieee80211_regdomain_init();
1343
1344         return 0;
1345
1346  fail_pid:
1347         rc80211_simple_exit();
1348  fail_simple:
1349         rc80211_pid_exit();
1350  fail:
1351         return ret;
1352 }
1353
1354 static void __exit ieee80211_exit(void)
1355 {
1356         rc80211_simple_exit();
1357         rc80211_pid_exit();
1358
1359         ieee80211_wme_unregister();
1360         ieee80211_debugfs_netdev_exit();
1361 }
1362
1363
1364 subsys_initcall(ieee80211_init);
1365 module_exit(ieee80211_exit);
1366
1367 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1368 MODULE_LICENSE("GPL");