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
 296         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 297
 298         netif_stop_queue(dev);
 299
 300         /*
 301          * Don't count this interface for promisc/allmulti while it
 302          * is down. dev_mc_unsync() will invoke set_multicast_list
 303          * on the master interface which will sync these down to the
 304          * hardware as filter flags.
 305          */
 306         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 307                 atomic_dec(&local->iff_allmultis);
 308
 309         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 310                 atomic_dec(&local->iff_promiscs);
 311
 312         dev_mc_unsync(local->mdev, dev);
 313
 314         /* down all dependent devices, that is VLANs */
 315         if (sdata->type == IEEE80211_IF_TYPE_AP) {
 316                 struct ieee80211_sub_if_data *vlan, *tmp;
 317
 318                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 319                                          u.vlan.list)
 320                         dev_close(vlan->dev);
 321                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 322         }
 323
 324         local->open_count--;
 325
 326         switch (sdata->type) {
 327         case IEEE80211_IF_TYPE_VLAN:
 328                 list_del(&sdata->u.vlan.list);
 329                 sdata->u.vlan.ap = NULL;
 330                 /* no need to tell driver */
 331                 break;
 332         case IEEE80211_IF_TYPE_MNTR:
 333                 local->monitors--;
 334                 if (local->monitors == 0) {
 335                         netif_tx_lock_bh(local->mdev);
 336                         ieee80211_configure_filter(local);
 337                         netif_tx_unlock_bh(local->mdev);
 338
 339                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 340                 }
 341                 break;
 342         case IEEE80211_IF_TYPE_STA:
 343         case IEEE80211_IF_TYPE_IBSS:
 344                 sdata->u.sta.state = IEEE80211_DISABLED;
 345                 del_timer_sync(&sdata->u.sta.timer);
 346                 /*
 347                  * When we get here, the interface is marked down.
 348                  * Call synchronize_rcu() to wait for the RX path
 349                  * should it be using the interface and enqueuing
 350                  * frames at this very time on another CPU.
 351                  */
 352                 synchronize_rcu();
 353                 skb_queue_purge(&sdata->u.sta.skb_queue);
 354
 355                 if (local->scan_dev == sdata->dev) {
 356                         if (!local->ops->hw_scan) {
 357                                 local->sta_sw_scanning = 0;
 358                                 cancel_delayed_work(&local->scan_work);
 359                         } else
 360                                 local->sta_hw_scanning = 0;
 361                 }
 362
 363                 flush_workqueue(local->hw.workqueue);
 364
 365                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 366                 kfree(sdata->u.sta.extra_ie);
 367                 sdata->u.sta.extra_ie = NULL;
 368                 sdata->u.sta.extra_ie_len = 0;
 369                 /* fall through */
 370         default:
 371                 conf.if_id = dev->ifindex;
 372                 conf.type = sdata->type;
 373                 conf.mac_addr = dev->dev_addr;
 374                 /* disable all keys for as long as this netdev is down */
 375                 ieee80211_disable_keys(sdata);
 376                 local->ops->remove_interface(local_to_hw(local), &conf);
 377         }
 378
 379         if (local->open_count == 0) {
 380                 if (netif_running(local->mdev))
 381                         dev_close(local->mdev);
 382
 383                 if (local->ops->stop)
 384                         local->ops->stop(local_to_hw(local));
 385
 386                 tasklet_disable(&local->tx_pending_tasklet);
 387                 tasklet_disable(&local->tasklet);
 388         }
 389
 390         return 0;
 391 }
 392
 393 static void ieee80211_set_multicast_list(struct net_device *dev)
 394 {
 395         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 396         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 397         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 398
 399         allmulti = !!(dev->flags & IFF_ALLMULTI);
 400         promisc = !!(dev->flags & IFF_PROMISC);
 401         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 402         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 403
 404         if (allmulti != sdata_allmulti) {
 405                 if (dev->flags & IFF_ALLMULTI)
 406                         atomic_inc(&local->iff_allmultis);
 407                 else
 408                         atomic_dec(&local->iff_allmultis);
 409                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 410         }
 411
 412         if (promisc != sdata_promisc) {
 413                 if (dev->flags & IFF_PROMISC)
 414                         atomic_inc(&local->iff_promiscs);
 415                 else
 416                         atomic_dec(&local->iff_promiscs);
 417                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 418         }
 419
 420         dev_mc_sync(local->mdev, dev);
 421 }
 422
 423 static const struct header_ops ieee80211_header_ops = {
 424         .create         = eth_header,
 425         .parse          = header_parse_80211,
 426         .rebuild        = eth_rebuild_header,
 427         .cache          = eth_header_cache,
 428         .cache_update   = eth_header_cache_update,
 429 };
 430
 431 /* Must not be called for mdev */
 432 void ieee80211_if_setup(struct net_device *dev)
 433 {
 434         ether_setup(dev);
 435         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 436         dev->wireless_handlers = &ieee80211_iw_handler_def;
 437         dev->set_multicast_list = ieee80211_set_multicast_list;
 438         dev->change_mtu = ieee80211_change_mtu;
 439         dev->open = ieee80211_open;
 440         dev->stop = ieee80211_stop;
 441         dev->destructor = ieee80211_if_free;
 442 }
 443
 444 /* WDS specialties */
 445
 446 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 447 {
 448         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 449         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 450         struct sta_info *sta;
 451         DECLARE_MAC_BUF(mac);
 452
 453         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 454                 return 0;
 455
 456         /* Create STA entry for the new peer */
 457         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 458         if (!sta)
 459                 return -ENOMEM;
 460         sta_info_put(sta);
 461
 462         /* Remove STA entry for the old peer */
 463         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 464         if (sta) {
 465                 sta_info_free(sta);
 466                 sta_info_put(sta);
 467         } else {
 468                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 469                        "peer %s\n",
 470                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 471         }
 472
 473         /* Update WDS link data */
 474         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 475
 476         return 0;
 477 }
 478
 479 /* everything else */
 480
 481 static int __ieee80211_if_config(struct net_device *dev,
 482                                  struct sk_buff *beacon,
 483                                  struct ieee80211_tx_control *control)
 484 {
 485         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 486         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 487         struct ieee80211_if_conf conf;
 488
 489         if (!local->ops->config_interface || !netif_running(dev))
 490                 return 0;
 491
 492         memset(&conf, 0, sizeof(conf));
 493         conf.type = sdata->type;
 494         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 495             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 496                 conf.bssid = sdata->u.sta.bssid;
 497                 conf.ssid = sdata->u.sta.ssid;
 498                 conf.ssid_len = sdata->u.sta.ssid_len;
 499         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 500                 conf.ssid = sdata->u.ap.ssid;
 501                 conf.ssid_len = sdata->u.ap.ssid_len;
 502                 conf.beacon = beacon;
 503                 conf.beacon_control = control;
 504         }
 505         return local->ops->config_interface(local_to_hw(local),
 506                                            dev->ifindex, &conf);
 507 }
 508
 509 int ieee80211_if_config(struct net_device *dev)
 510 {
 511         return __ieee80211_if_config(dev, NULL, NULL);
 512 }
 513
 514 int ieee80211_if_config_beacon(struct net_device *dev)
 515 {
 516         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 517         struct ieee80211_tx_control control;
 518         struct sk_buff *skb;
 519
 520         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 521                 return 0;
 522         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 523         if (!skb)
 524                 return -ENOMEM;
 525         return __ieee80211_if_config(dev, skb, &control);
 526 }
 527
 528 int ieee80211_hw_config(struct ieee80211_local *local)
 529 {
 530         struct ieee80211_hw_mode *mode;
 531         struct ieee80211_channel *chan;
 532         int ret = 0;
 533
 534         if (local->sta_sw_scanning) {
 535                 chan = local->scan_channel;
 536                 mode = local->scan_hw_mode;
 537         } else {
 538                 chan = local->oper_channel;
 539                 mode = local->oper_hw_mode;
 540         }
 541
 542         local->hw.conf.channel = chan->chan;
 543         local->hw.conf.channel_val = chan->val;
 544         if (!local->hw.conf.power_level) {
 545                 local->hw.conf.power_level = chan->power_level;
 546         } else {
 547                 local->hw.conf.power_level = min(chan->power_level,
 548                                                  local->hw.conf.power_level);
 549         }
 550         local->hw.conf.freq = chan->freq;
 551         local->hw.conf.phymode = mode->mode;
 552         local->hw.conf.antenna_max = chan->antenna_max;
 553         local->hw.conf.chan = chan;
 554         local->hw.conf.mode = mode;
 555
 556 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 557         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 558                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 559                local->hw.conf.phymode);
 560 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 561
 562         if (local->open_count)
 563                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 564
 565         return ret;
 566 }
 567
 568 /**
 569  * ieee80211_hw_config_ht should be used only after legacy configuration
 570  * has been determined, as ht configuration depends upon the hardware's
 571  * HT abilities for a _specific_ band.
 572  */
 573 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 574                            struct ieee80211_ht_info *req_ht_cap,
 575                            struct ieee80211_ht_bss_info *req_bss_cap)
 576 {
 577         struct ieee80211_conf *conf = &local->hw.conf;
 578         struct ieee80211_hw_mode *mode = conf->mode;
 579         int i;
 580
 581         /* HT is not supported */
 582         if (!mode->ht_info.ht_supported) {
 583                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 584                 return -EOPNOTSUPP;
 585         }
 586
 587         /* disable HT */
 588         if (!enable_ht) {
 589                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 590         } else {
 591                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
 592                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
 593                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
 594                 conf->ht_conf.cap |=
 595                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
 596                 conf->ht_bss_conf.primary_channel =
 597                         req_bss_cap->primary_channel;
 598                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
 599                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
 600                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
 601                         conf->ht_conf.supp_mcs_set[i] =
 602                                 mode->ht_info.supp_mcs_set[i] &
 603                                   req_ht_cap->supp_mcs_set[i];
 604
 605                 /* In STA mode, this gives us indication
 606                  * to the AP's mode of operation */
 607                 conf->ht_conf.ht_supported = 1;
 608                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
 609                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
 610         }
 611
 612         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
 613
 614         return 0;
 615 }
 616
 617 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 618 {
 619         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 620         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 621         if (local->ops->erp_ie_changed)
 622                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 623                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 624                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 625 }
 626
 627 void ieee80211_reset_erp_info(struct net_device *dev)
 628 {
 629         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 630
 631         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 632                         IEEE80211_SDATA_SHORT_PREAMBLE);
 633         ieee80211_erp_info_change_notify(dev,
 634                                          IEEE80211_ERP_CHANGE_PROTECTION |
 635                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 636 }
 637
 638 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 639                                  struct sk_buff *skb,
 640                                  struct ieee80211_tx_status *status)
 641 {
 642         struct ieee80211_local *local = hw_to_local(hw);
 643         struct ieee80211_tx_status *saved;
 644         int tmp;
 645
 646         skb->dev = local->mdev;
 647         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 648         if (unlikely(!saved)) {
 649                 if (net_ratelimit())
 650                         printk(KERN_WARNING "%s: Not enough memory, "
 651                                "dropping tx status", skb->dev->name);
 652                 /* should be dev_kfree_skb_irq, but due to this function being
 653                  * named _irqsafe instead of just _irq we can't be sure that
 654                  * people won't call it from non-irq contexts */
 655                 dev_kfree_skb_any(skb);
 656                 return;
 657         }
 658         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 659         /* copy pointer to saved status into skb->cb for use by tasklet */
 660         memcpy(skb->cb, &saved, sizeof(saved));
 661
 662         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 663         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 664                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 665         tmp = skb_queue_len(&local->skb_queue) +
 666                 skb_queue_len(&local->skb_queue_unreliable);
 667         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 668                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 669                 memcpy(&saved, skb->cb, sizeof(saved));
 670                 kfree(saved);
 671                 dev_kfree_skb_irq(skb);
 672                 tmp--;
 673                 I802_DEBUG_INC(local->tx_status_drop);
 674         }
 675         tasklet_schedule(&local->tasklet);
 676 }
 677 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 678
 679 static void ieee80211_tasklet_handler(unsigned long data)
 680 {
 681         struct ieee80211_local *local = (struct ieee80211_local *) data;
 682         struct sk_buff *skb;
 683         struct ieee80211_rx_status rx_status;
 684         struct ieee80211_tx_status *tx_status;
 685
 686         while ((skb = skb_dequeue(&local->skb_queue)) ||
 687                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 688                 switch (skb->pkt_type) {
 689                 case IEEE80211_RX_MSG:
 690                         /* status is in skb->cb */
 691                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 692                         /* Clear skb->type in order to not confuse kernel
 693                          * netstack. */
 694                         skb->pkt_type = 0;
 695                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 696                         break;
 697                 case IEEE80211_TX_STATUS_MSG:
 698                         /* get pointer to saved status out of skb->cb */
 699                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 700                         skb->pkt_type = 0;
 701                         ieee80211_tx_status(local_to_hw(local),
 702                                             skb, tx_status);
 703                         kfree(tx_status);
 704                         break;
 705                 default: /* should never get here! */
 706                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 707                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 708                         dev_kfree_skb(skb);
 709                         break;
 710                 }
 711         }
 712 }
 713
 714 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 715  * make a prepared TX frame (one that has been given to hw) to look like brand
 716  * new IEEE 802.11 frame that is ready to go through TX processing again.
 717  * Also, tx_packet_data in cb is restored from tx_control. */
 718 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 719                                       struct ieee80211_key *key,
 720                                       struct sk_buff *skb,
 721                                       struct ieee80211_tx_control *control)
 722 {
 723         int hdrlen, iv_len, mic_len;
 724         struct ieee80211_tx_packet_data *pkt_data;
 725
 726         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 727         pkt_data->ifindex = control->ifindex;
 728         pkt_data->flags = 0;
 729         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 730                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 731         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 732                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 733         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 734                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 735         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 736                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 737         pkt_data->queue = control->queue;
 738
 739         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 740
 741         if (!key)
 742                 goto no_key;
 743
 744         switch (key->conf.alg) {
 745         case ALG_WEP:
 746                 iv_len = WEP_IV_LEN;
 747                 mic_len = WEP_ICV_LEN;
 748                 break;
 749         case ALG_TKIP:
 750                 iv_len = TKIP_IV_LEN;
 751                 mic_len = TKIP_ICV_LEN;
 752                 break;
 753         case ALG_CCMP:
 754                 iv_len = CCMP_HDR_LEN;
 755                 mic_len = CCMP_MIC_LEN;
 756                 break;
 757         default:
 758                 goto no_key;
 759         }
 760
 761         if (skb->len >= mic_len &&
 762             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 763                 skb_trim(skb, skb->len - mic_len);
 764         if (skb->len >= iv_len && skb->len > hdrlen) {
 765                 memmove(skb->data + iv_len, skb->data, hdrlen);
 766                 skb_pull(skb, iv_len);
 767         }
 768
 769 no_key:
 770         {
 771                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 772                 u16 fc = le16_to_cpu(hdr->frame_control);
 773                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 774                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 775                         hdr->frame_control = cpu_to_le16(fc);
 776                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 777                         skb_pull(skb, 2);
 778                 }
 779         }
 780 }
 781
 782 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 783                          struct ieee80211_tx_status *status)
 784 {
 785         struct sk_buff *skb2;
 786         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 787         struct ieee80211_local *local = hw_to_local(hw);
 788         u16 frag, type;
 789         struct ieee80211_tx_status_rtap_hdr *rthdr;
 790         struct ieee80211_sub_if_data *sdata;
 791         int monitors;
 792
 793         if (!status) {
 794                 printk(KERN_ERR
 795                        "%s: ieee80211_tx_status called with NULL status\n",
 796                        wiphy_name(local->hw.wiphy));
 797                 dev_kfree_skb(skb);
 798                 return;
 799         }
 800
 801         if (status->excessive_retries) {
 802                 struct sta_info *sta;
 803                 sta = sta_info_get(local, hdr->addr1);
 804                 if (sta) {
 805                         if (sta->flags & WLAN_STA_PS) {
 806                                 /* The STA is in power save mode, so assume
 807                                  * that this TX packet failed because of that.
 808                                  */
 809                                 status->excessive_retries = 0;
 810                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 811                         }
 812                         sta_info_put(sta);
 813                 }
 814         }
 815
 816         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 817                 struct sta_info *sta;
 818                 sta = sta_info_get(local, hdr->addr1);
 819                 if (sta) {
 820                         sta->tx_filtered_count++;
 821
 822                         /* Clear the TX filter mask for this STA when sending
 823                          * the next packet. If the STA went to power save mode,
 824                          * this will happen when it is waking up for the next
 825                          * time. */
 826                         sta->clear_dst_mask = 1;
 827
 828                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 829                          * the race between RX and TX status causing some
 830                          * packets to be filtered out before 80211.o gets an
 831                          * update for PS status? This seems to be the case, so
 832                          * no changes are likely to be needed. */
 833                         if (sta->flags & WLAN_STA_PS &&
 834                             skb_queue_len(&sta->tx_filtered) <
 835                             STA_MAX_TX_BUFFER) {
 836                                 ieee80211_remove_tx_extra(local, sta->key,
 837                                                           skb,
 838                                                           &status->control);
 839                                 skb_queue_tail(&sta->tx_filtered, skb);
 840                         } else if (!(sta->flags & WLAN_STA_PS) &&
 841                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 842                                 /* Software retry the packet once */
 843                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 844                                 ieee80211_remove_tx_extra(local, sta->key,
 845                                                           skb,
 846                                                           &status->control);
 847                                 dev_queue_xmit(skb);
 848                         } else {
 849                                 if (net_ratelimit()) {
 850                                         printk(KERN_DEBUG "%s: dropped TX "
 851                                                "filtered frame queue_len=%d "
 852                                                "PS=%d @%lu\n",
 853                                                wiphy_name(local->hw.wiphy),
 854                                                skb_queue_len(
 855                                                        &sta->tx_filtered),
 856                                                !!(sta->flags & WLAN_STA_PS),
 857                                                jiffies);
 858                                 }
 859                                 dev_kfree_skb(skb);
 860                         }
 861                         sta_info_put(sta);
 862                         return;
 863                 }
 864         } else
 865                 rate_control_tx_status(local->mdev, skb, status);
 866
 867         ieee80211_led_tx(local, 0);
 868
 869         /* SNMP counters
 870          * Fragments are passed to low-level drivers as separate skbs, so these
 871          * are actually fragments, not frames. Update frame counters only for
 872          * the first fragment of the frame. */
 873
 874         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 875         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 876
 877         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 878                 if (frag == 0) {
 879                         local->dot11TransmittedFrameCount++;
 880                         if (is_multicast_ether_addr(hdr->addr1))
 881                                 local->dot11MulticastTransmittedFrameCount++;
 882                         if (status->retry_count > 0)
 883                                 local->dot11RetryCount++;
 884                         if (status->retry_count > 1)
 885                                 local->dot11MultipleRetryCount++;
 886                 }
 887
 888                 /* This counter shall be incremented for an acknowledged MPDU
 889                  * with an individual address in the address 1 field or an MPDU
 890                  * with a multicast address in the address 1 field of type Data
 891                  * or Management. */
 892                 if (!is_multicast_ether_addr(hdr->addr1) ||
 893                     type == IEEE80211_FTYPE_DATA ||
 894                     type == IEEE80211_FTYPE_MGMT)
 895                         local->dot11TransmittedFragmentCount++;
 896         } else {
 897                 if (frag == 0)
 898                         local->dot11FailedCount++;
 899         }
 900
 901         /* this was a transmitted frame, but now we want to reuse it */
 902         skb_orphan(skb);
 903
 904         if (!local->monitors) {
 905                 dev_kfree_skb(skb);
 906                 return;
 907         }
 908
 909         /* send frame to monitor interfaces now */
 910
 911         if (skb_headroom(skb) < sizeof(*rthdr)) {
 912                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 913                 dev_kfree_skb(skb);
 914                 return;
 915         }
 916
 917         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 918                                 skb_push(skb, sizeof(*rthdr));
 919
 920         memset(rthdr, 0, sizeof(*rthdr));
 921         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 922         rthdr->hdr.it_present =
 923                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 924                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 925
 926         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 927             !is_multicast_ether_addr(hdr->addr1))
 928                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 929
 930         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 931             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 932                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 933         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 934                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 935
 936         rthdr->data_retries = status->retry_count;
 937
 938         rcu_read_lock();
 939         monitors = local->monitors;
 940         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 941                 /*
 942                  * Using the monitors counter is possibly racy, but
 943                  * if the value is wrong we simply either clone the skb
 944                  * once too much or forget sending it to one monitor iface
 945                  * The latter case isn't nice but fixing the race is much
 946                  * more complicated.
 947                  */
 948                 if (!monitors || !skb)
 949                         goto out;
 950
 951                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 952                         if (!netif_running(sdata->dev))
 953                                 continue;
 954                         monitors--;
 955                         if (monitors)
 956                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 957                         else
 958                                 skb2 = NULL;
 959                         skb->dev = sdata->dev;
 960                         /* XXX: is this sufficient for BPF? */
 961                         skb_set_mac_header(skb, 0);
 962                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 963                         skb->pkt_type = PACKET_OTHERHOST;
 964                         skb->protocol = htons(ETH_P_802_2);
 965                         memset(skb->cb, 0, sizeof(skb->cb));
 966                         netif_rx(skb);
 967                         skb = skb2;
 968                 }
 969         }
 970  out:
 971         rcu_read_unlock();
 972         if (skb)
 973                 dev_kfree_skb(skb);
 974 }
 975 EXPORT_SYMBOL(ieee80211_tx_status);
 976
 977 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 978                                         const struct ieee80211_ops *ops)
 979 {
 980         struct net_device *mdev;
 981         struct ieee80211_local *local;
 982         struct ieee80211_sub_if_data *sdata;
 983         int priv_size;
 984         struct wiphy *wiphy;
 985
 986         /* Ensure 32-byte alignment of our private data and hw private data.
 987          * We use the wiphy priv data for both our ieee80211_local and for
 988          * the driver's private data
 989          *
 990          * In memory it'll be like this:
 991          *
 992          * +-------------------------+
 993          * | struct wiphy           |
 994          * +-------------------------+
 995          * | struct ieee80211_local  |
 996          * +-------------------------+
 997          * | driver's private data   |
 998          * +-------------------------+
 999          *
1000          */
1001         priv_size = ((sizeof(struct ieee80211_local) +
1002                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1003                     priv_data_len;
1004
1005         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1006
1007         if (!wiphy)
1008                 return NULL;
1009
1010         wiphy->privid = mac80211_wiphy_privid;
1011
1012         local = wiphy_priv(wiphy);
1013         local->hw.wiphy = wiphy;
1014
1015         local->hw.priv = (char *)local +
1016                          ((sizeof(struct ieee80211_local) +
1017                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1018
1019         BUG_ON(!ops->tx);
1020         BUG_ON(!ops->start);
1021         BUG_ON(!ops->stop);
1022         BUG_ON(!ops->config);
1023         BUG_ON(!ops->add_interface);
1024         BUG_ON(!ops->remove_interface);
1025         BUG_ON(!ops->configure_filter);
1026         local->ops = ops;
1027
1028         /* for now, mdev needs sub_if_data :/ */
1029         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1030                             "wmaster%d", ether_setup);
1031         if (!mdev) {
1032                 wiphy_free(wiphy);
1033                 return NULL;
1034         }
1035
1036         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1037         mdev->ieee80211_ptr = &sdata->wdev;
1038         sdata->wdev.wiphy = wiphy;
1039
1040         local->hw.queues = 1; /* default */
1041
1042         local->mdev = mdev;
1043         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1044         local->rx_handlers = ieee80211_rx_handlers;
1045         local->tx_handlers = ieee80211_tx_handlers;
1046
1047         local->bridge_packets = 1;
1048
1049         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1050         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1051         local->short_retry_limit = 7;
1052         local->long_retry_limit = 4;
1053         local->hw.conf.radio_enabled = 1;
1054
1055         local->enabled_modes = ~0;
1056
1057         INIT_LIST_HEAD(&local->modes_list);
1058
1059         INIT_LIST_HEAD(&local->interfaces);
1060
1061         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1062         ieee80211_rx_bss_list_init(mdev);
1063
1064         sta_info_init(local);
1065
1066         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1067         mdev->open = ieee80211_master_open;
1068         mdev->stop = ieee80211_master_stop;
1069         mdev->type = ARPHRD_IEEE80211;
1070         mdev->header_ops = &ieee80211_header_ops;
1071         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1072
1073         sdata->type = IEEE80211_IF_TYPE_AP;
1074         sdata->dev = mdev;
1075         sdata->local = local;
1076         sdata->u.ap.force_unicast_rateidx = -1;
1077         sdata->u.ap.max_ratectrl_rateidx = -1;
1078         ieee80211_if_sdata_init(sdata);
1079         /* no RCU needed since we're still during init phase */
1080         list_add_tail(&sdata->list, &local->interfaces);
1081
1082         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1083                      (unsigned long)local);
1084         tasklet_disable(&local->tx_pending_tasklet);
1085
1086         tasklet_init(&local->tasklet,
1087                      ieee80211_tasklet_handler,
1088                      (unsigned long) local);
1089         tasklet_disable(&local->tasklet);
1090
1091         skb_queue_head_init(&local->skb_queue);
1092         skb_queue_head_init(&local->skb_queue_unreliable);
1093
1094         return local_to_hw(local);
1095 }
1096 EXPORT_SYMBOL(ieee80211_alloc_hw);
1097
1098 int ieee80211_register_hw(struct ieee80211_hw *hw)
1099 {
1100         struct ieee80211_local *local = hw_to_local(hw);
1101         const char *name;
1102         int result;
1103
1104         result = wiphy_register(local->hw.wiphy);
1105         if (result < 0)
1106                 return result;
1107
1108         name = wiphy_dev(local->hw.wiphy)->driver->name;
1109         local->hw.workqueue = create_singlethread_workqueue(name);
1110         if (!local->hw.workqueue) {
1111                 result = -ENOMEM;
1112                 goto fail_workqueue;
1113         }
1114
1115         /*
1116          * The hardware needs headroom for sending the frame,
1117          * and we need some headroom for passing the frame to monitor
1118          * interfaces, but never both at the same time.
1119          */
1120         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1121                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1122
1123         debugfs_hw_add(local);
1124
1125         local->hw.conf.beacon_int = 1000;
1126
1127         local->wstats_flags |= local->hw.max_rssi ?
1128                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1129         local->wstats_flags |= local->hw.max_signal ?
1130                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1131         local->wstats_flags |= local->hw.max_noise ?
1132                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1133         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1134                 local->wstats_flags |= IW_QUAL_DBM;
1135
1136         result = sta_info_start(local);
1137         if (result < 0)
1138                 goto fail_sta_info;
1139
1140         rtnl_lock();
1141         result = dev_alloc_name(local->mdev, local->mdev->name);
1142         if (result < 0)
1143                 goto fail_dev;
1144
1145         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1146         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1147
1148         result = register_netdevice(local->mdev);
1149         if (result < 0)
1150                 goto fail_dev;
1151
1152         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1153         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1154
1155         result = ieee80211_init_rate_ctrl_alg(local,
1156                                               hw->rate_control_algorithm);
1157         if (result < 0) {
1158                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1159                        "algorithm\n", wiphy_name(local->hw.wiphy));
1160                 goto fail_rate;
1161         }
1162
1163         result = ieee80211_wep_init(local);
1164
1165         if (result < 0) {
1166                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1167                        wiphy_name(local->hw.wiphy));
1168                 goto fail_wep;
1169         }
1170
1171         ieee80211_install_qdisc(local->mdev);
1172
1173         /* add one default STA interface */
1174         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1175                                   IEEE80211_IF_TYPE_STA);
1176         if (result)
1177                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1178                        wiphy_name(local->hw.wiphy));
1179
1180         local->reg_state = IEEE80211_DEV_REGISTERED;
1181         rtnl_unlock();
1182
1183         ieee80211_led_init(local);
1184
1185         return 0;
1186
1187 fail_wep:
1188         rate_control_deinitialize(local);
1189 fail_rate:
1190         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1191         unregister_netdevice(local->mdev);
1192 fail_dev:
1193         rtnl_unlock();
1194         sta_info_stop(local);
1195 fail_sta_info:
1196         debugfs_hw_del(local);
1197         destroy_workqueue(local->hw.workqueue);
1198 fail_workqueue:
1199         wiphy_unregister(local->hw.wiphy);
1200         return result;
1201 }
1202 EXPORT_SYMBOL(ieee80211_register_hw);
1203
1204 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1205                               struct ieee80211_hw_mode *mode)
1206 {
1207         struct ieee80211_local *local = hw_to_local(hw);
1208         struct ieee80211_rate *rate;
1209         int i;
1210
1211         INIT_LIST_HEAD(&mode->list);
1212         list_add_tail(&mode->list, &local->modes_list);
1213
1214         local->hw_modes |= (1 << mode->mode);
1215         for (i = 0; i < mode->num_rates; i++) {
1216                 rate = &(mode->rates[i]);
1217                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1218         }
1219         ieee80211_prepare_rates(local, mode);
1220
1221         if (!local->oper_hw_mode) {
1222                 /* Default to this mode */
1223                 local->hw.conf.phymode = mode->mode;
1224                 local->oper_hw_mode = local->scan_hw_mode = mode;
1225                 local->oper_channel = local->scan_channel = &mode->channels[0];
1226                 local->hw.conf.mode = local->oper_hw_mode;
1227                 local->hw.conf.chan = local->oper_channel;
1228         }
1229
1230         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1231                 ieee80211_set_default_regdomain(mode);
1232
1233         return 0;
1234 }
1235 EXPORT_SYMBOL(ieee80211_register_hwmode);
1236
1237 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1238 {
1239         struct ieee80211_local *local = hw_to_local(hw);
1240         struct ieee80211_sub_if_data *sdata, *tmp;
1241         int i;
1242
1243         tasklet_kill(&local->tx_pending_tasklet);
1244         tasklet_kill(&local->tasklet);
1245
1246         rtnl_lock();
1247
1248         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1249
1250         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1251
1252         /*
1253          * At this point, interface list manipulations are fine
1254          * because the driver cannot be handing us frames any
1255          * more and the tasklet is killed.
1256          */
1257
1258         /*
1259          * First, we remove all non-master interfaces. Do this because they
1260          * may have bss pointer dependency on the master, and when we free
1261          * the master these would be freed as well, breaking our list
1262          * iteration completely.
1263          */
1264         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1265                 if (sdata->dev == local->mdev)
1266                         continue;
1267                 list_del(&sdata->list);
1268                 __ieee80211_if_del(local, sdata);
1269         }
1270
1271         /* then, finally, remove the master interface */
1272         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1273
1274         rtnl_unlock();
1275
1276         ieee80211_rx_bss_list_deinit(local->mdev);
1277         ieee80211_clear_tx_pending(local);
1278         sta_info_stop(local);
1279         rate_control_deinitialize(local);
1280         debugfs_hw_del(local);
1281
1282         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1283                 kfree(local->supp_rates[i]);
1284                 kfree(local->basic_rates[i]);
1285         }
1286
1287         if (skb_queue_len(&local->skb_queue)
1288                         || skb_queue_len(&local->skb_queue_unreliable))
1289                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1290                        wiphy_name(local->hw.wiphy));
1291         skb_queue_purge(&local->skb_queue);
1292         skb_queue_purge(&local->skb_queue_unreliable);
1293
1294         destroy_workqueue(local->hw.workqueue);
1295         wiphy_unregister(local->hw.wiphy);
1296         ieee80211_wep_free(local);
1297         ieee80211_led_exit(local);
1298 }
1299 EXPORT_SYMBOL(ieee80211_unregister_hw);
1300
1301 void ieee80211_free_hw(struct ieee80211_hw *hw)
1302 {
1303         struct ieee80211_local *local = hw_to_local(hw);
1304
1305         ieee80211_if_free(local->mdev);
1306         wiphy_free(local->hw.wiphy);
1307 }
1308 EXPORT_SYMBOL(ieee80211_free_hw);
1309
1310 static int __init ieee80211_init(void)
1311 {
1312         struct sk_buff *skb;
1313         int ret;
1314
1315         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1316
1317 #ifdef CONFIG_MAC80211_RC_SIMPLE
1318         ret = ieee80211_rate_control_register(&mac80211_rcsimple);
1319         if (ret)
1320                 goto fail;
1321 #endif
1322
1323 #ifdef CONFIG_MAC80211_RC_PID
1324         ret = ieee80211_rate_control_register(&mac80211_rcpid);
1325         if (ret)
1326                 goto fail;
1327 #endif
1328
1329         ret = ieee80211_wme_register();
1330         if (ret) {
1331                 printk(KERN_DEBUG "ieee80211_init: failed to "
1332                        "initialize WME (err=%d)\n", ret);
1333                 goto fail;
1334         }
1335
1336         ieee80211_debugfs_netdev_init();
1337         ieee80211_regdomain_init();
1338
1339         return 0;
1340
1341 fail:
1342
1343 #ifdef CONFIG_MAC80211_RC_SIMPLE
1344         ieee80211_rate_control_unregister(&mac80211_rcsimple);
1345 #endif
1346 #ifdef CONFIG_MAC80211_RC_PID
1347         ieee80211_rate_control_unregister(&mac80211_rcpid);
1348 #endif
1349
1350         return ret;
1351 }
1352
1353 static void __exit ieee80211_exit(void)
1354 {
1355 #ifdef CONFIG_MAC80211_RC_SIMPLE
1356         ieee80211_rate_control_unregister(&mac80211_rcsimple);
1357 #endif
1358 #ifdef CONFIG_MAC80211_RC_PID
1359         ieee80211_rate_control_unregister(&mac80211_rcpid);
1360 #endif
1361
1362         ieee80211_wme_unregister();
1363         ieee80211_debugfs_netdev_exit();
1364 }
1365
1366
1367 subsys_initcall(ieee80211_init);
1368 module_exit(ieee80211_exit);
1369
1370 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1371 MODULE_LICENSE("GPL");