err.no Git - linux-2.6/blob - 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->vif.type,
 181                                                         nsdata->vif.type))
 182                                 return -ENOTUNIQ;
 183
 184                         /*
 185                          * can only add VLANs to enabled APs
 186                          */
 187                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 188                             nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
 189                             netif_running(nsdata->dev))
 190                                 sdata->u.vlan.ap = nsdata;
 191                 }
 192         }
 193
 194         switch (sdata->vif.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                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 223         }
 224
 225         switch (sdata->vif.type) {
 226         case IEEE80211_IF_TYPE_VLAN:
 227                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 228                 /* no need to tell driver */
 229                 break;
 230         case IEEE80211_IF_TYPE_MNTR:
 231                 /* must be before the call to ieee80211_configure_filter */
 232                 local->monitors++;
 233                 if (local->monitors == 1) {
 234                         netif_tx_lock_bh(local->mdev);
 235                         ieee80211_configure_filter(local);
 236                         netif_tx_unlock_bh(local->mdev);
 237
 238                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 239                 }
 240                 break;
 241         case IEEE80211_IF_TYPE_STA:
 242         case IEEE80211_IF_TYPE_IBSS:
 243                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 244                 /* fall through */
 245         default:
 246                 conf.vif = &sdata->vif;
 247                 conf.type = sdata->vif.type;
 248                 conf.mac_addr = dev->dev_addr;
 249                 res = local->ops->add_interface(local_to_hw(local), &conf);
 250                 if (res && !local->open_count && local->ops->stop)
 251                         local->ops->stop(local_to_hw(local));
 252                 if (res)
 253                         return res;
 254
 255                 ieee80211_if_config(dev);
 256                 ieee80211_reset_erp_info(dev);
 257                 ieee80211_enable_keys(sdata);
 258
 259                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 260                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 261                         netif_carrier_off(dev);
 262                 else
 263                         netif_carrier_on(dev);
 264         }
 265
 266         if (local->open_count == 0) {
 267                 res = dev_open(local->mdev);
 268                 WARN_ON(res);
 269                 tasklet_enable(&local->tx_pending_tasklet);
 270                 tasklet_enable(&local->tasklet);
 271         }
 272
 273         /*
 274          * set_multicast_list will be invoked by the networking core
 275          * which will check whether any increments here were done in
 276          * error and sync them down to the hardware as filter flags.
 277          */
 278         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 279                 atomic_inc(&local->iff_allmultis);
 280
 281         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 282                 atomic_inc(&local->iff_promiscs);
 283
 284         local->open_count++;
 285
 286         netif_start_queue(dev);
 287
 288         return 0;
 289 }
 290
 291 static int ieee80211_stop(struct net_device *dev)
 292 {
 293         struct ieee80211_sub_if_data *sdata;
 294         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 295         struct ieee80211_if_init_conf conf;
 296         struct sta_info *sta;
 297         int i;
 298
 299         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 300
 301         list_for_each_entry(sta, &local->sta_list, list) {
 302                 for (i = 0; i <  STA_TID_NUM; i++)
 303                         ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr,
 304                                                 i, WLAN_BACK_RECIPIENT,
 305                                                 WLAN_REASON_QSTA_LEAVE_QBSS);
 306         }
 307
 308         netif_stop_queue(dev);
 309
 310         /*
 311          * Don't count this interface for promisc/allmulti while it
 312          * is down. dev_mc_unsync() will invoke set_multicast_list
 313          * on the master interface which will sync these down to the
 314          * hardware as filter flags.
 315          */
 316         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 317                 atomic_dec(&local->iff_allmultis);
 318
 319         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 320                 atomic_dec(&local->iff_promiscs);
 321
 322         dev_mc_unsync(local->mdev, dev);
 323
 324         /* APs need special treatment */
 325         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 326                 struct ieee80211_sub_if_data *vlan, *tmp;
 327                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 328
 329                 /* remove beacon */
 330                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 331                 synchronize_rcu();
 332                 kfree(old_beacon);
 333
 334                 /* down all dependent devices, that is VLANs */
 335                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 336                                          u.vlan.list)
 337                         dev_close(vlan->dev);
 338                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 339         }
 340
 341         local->open_count--;
 342
 343         switch (sdata->vif.type) {
 344         case IEEE80211_IF_TYPE_VLAN:
 345                 list_del(&sdata->u.vlan.list);
 346                 sdata->u.vlan.ap = NULL;
 347                 /* no need to tell driver */
 348                 break;
 349         case IEEE80211_IF_TYPE_MNTR:
 350                 local->monitors--;
 351                 if (local->monitors == 0) {
 352                         netif_tx_lock_bh(local->mdev);
 353                         ieee80211_configure_filter(local);
 354                         netif_tx_unlock_bh(local->mdev);
 355
 356                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 357                 }
 358                 break;
 359         case IEEE80211_IF_TYPE_STA:
 360         case IEEE80211_IF_TYPE_IBSS:
 361                 sdata->u.sta.state = IEEE80211_DISABLED;
 362                 del_timer_sync(&sdata->u.sta.timer);
 363                 /*
 364                  * When we get here, the interface is marked down.
 365                  * Call synchronize_rcu() to wait for the RX path
 366                  * should it be using the interface and enqueuing
 367                  * frames at this very time on another CPU.
 368                  */
 369                 synchronize_rcu();
 370                 skb_queue_purge(&sdata->u.sta.skb_queue);
 371
 372                 if (local->scan_dev == sdata->dev) {
 373                         if (!local->ops->hw_scan) {
 374                                 local->sta_sw_scanning = 0;
 375                                 cancel_delayed_work(&local->scan_work);
 376                         } else
 377                                 local->sta_hw_scanning = 0;
 378                 }
 379
 380                 flush_workqueue(local->hw.workqueue);
 381
 382                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 383                 kfree(sdata->u.sta.extra_ie);
 384                 sdata->u.sta.extra_ie = NULL;
 385                 sdata->u.sta.extra_ie_len = 0;
 386                 /* fall through */
 387         default:
 388                 conf.vif = &sdata->vif;
 389                 conf.type = sdata->vif.type;
 390                 conf.mac_addr = dev->dev_addr;
 391                 /* disable all keys for as long as this netdev is down */
 392                 ieee80211_disable_keys(sdata);
 393                 local->ops->remove_interface(local_to_hw(local), &conf);
 394         }
 395
 396         if (local->open_count == 0) {
 397                 if (netif_running(local->mdev))
 398                         dev_close(local->mdev);
 399
 400                 if (local->ops->stop)
 401                         local->ops->stop(local_to_hw(local));
 402
 403                 ieee80211_led_radio(local, 0);
 404
 405                 tasklet_disable(&local->tx_pending_tasklet);
 406                 tasklet_disable(&local->tasklet);
 407         }
 408
 409         return 0;
 410 }
 411
 412 static void ieee80211_set_multicast_list(struct net_device *dev)
 413 {
 414         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 415         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 416         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 417
 418         allmulti = !!(dev->flags & IFF_ALLMULTI);
 419         promisc = !!(dev->flags & IFF_PROMISC);
 420         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 421         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 422
 423         if (allmulti != sdata_allmulti) {
 424                 if (dev->flags & IFF_ALLMULTI)
 425                         atomic_inc(&local->iff_allmultis);
 426                 else
 427                         atomic_dec(&local->iff_allmultis);
 428                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 429         }
 430
 431         if (promisc != sdata_promisc) {
 432                 if (dev->flags & IFF_PROMISC)
 433                         atomic_inc(&local->iff_promiscs);
 434                 else
 435                         atomic_dec(&local->iff_promiscs);
 436                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 437         }
 438
 439         dev_mc_sync(local->mdev, dev);
 440 }
 441
 442 static const struct header_ops ieee80211_header_ops = {
 443         .create         = eth_header,
 444         .parse          = header_parse_80211,
 445         .rebuild        = eth_rebuild_header,
 446         .cache          = eth_header_cache,
 447         .cache_update   = eth_header_cache_update,
 448 };
 449
 450 /* Must not be called for mdev */
 451 void ieee80211_if_setup(struct net_device *dev)
 452 {
 453         ether_setup(dev);
 454         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 455         dev->wireless_handlers = &ieee80211_iw_handler_def;
 456         dev->set_multicast_list = ieee80211_set_multicast_list;
 457         dev->change_mtu = ieee80211_change_mtu;
 458         dev->open = ieee80211_open;
 459         dev->stop = ieee80211_stop;
 460         dev->destructor = ieee80211_if_free;
 461 }
 462
 463 /* WDS specialties */
 464
 465 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 466 {
 467         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 468         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 469         struct sta_info *sta;
 470         DECLARE_MAC_BUF(mac);
 471
 472         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 473                 return 0;
 474
 475         /* Create STA entry for the new peer */
 476         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 477         if (!sta)
 478                 return -ENOMEM;
 479         sta_info_put(sta);
 480
 481         /* Remove STA entry for the old peer */
 482         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 483         if (sta) {
 484                 sta_info_free(sta);
 485                 sta_info_put(sta);
 486         } else {
 487                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 488                        "peer %s\n",
 489                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 490         }
 491
 492         /* Update WDS link data */
 493         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 494
 495         return 0;
 496 }
 497
 498 /* everything else */
 499
 500 static int __ieee80211_if_config(struct net_device *dev,
 501                                  struct sk_buff *beacon,
 502                                  struct ieee80211_tx_control *control)
 503 {
 504         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 505         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 506         struct ieee80211_if_conf conf;
 507
 508         if (!local->ops->config_interface || !netif_running(dev))
 509                 return 0;
 510
 511         memset(&conf, 0, sizeof(conf));
 512         conf.type = sdata->vif.type;
 513         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 514             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 515                 conf.bssid = sdata->u.sta.bssid;
 516                 conf.ssid = sdata->u.sta.ssid;
 517                 conf.ssid_len = sdata->u.sta.ssid_len;
 518         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 519                 conf.ssid = sdata->u.ap.ssid;
 520                 conf.ssid_len = sdata->u.ap.ssid_len;
 521                 conf.beacon = beacon;
 522                 conf.beacon_control = control;
 523         }
 524         return local->ops->config_interface(local_to_hw(local),
 525                                             &sdata->vif, &conf);
 526 }
 527
 528 int ieee80211_if_config(struct net_device *dev)
 529 {
 530         return __ieee80211_if_config(dev, NULL, NULL);
 531 }
 532
 533 int ieee80211_if_config_beacon(struct net_device *dev)
 534 {
 535         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 536         struct ieee80211_tx_control control;
 537         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 538         struct sk_buff *skb;
 539
 540         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 541                 return 0;
 542         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
 543                                    &control);
 544         if (!skb)
 545                 return -ENOMEM;
 546         return __ieee80211_if_config(dev, skb, &control);
 547 }
 548
 549 int ieee80211_hw_config(struct ieee80211_local *local)
 550 {
 551         struct ieee80211_hw_mode *mode;
 552         struct ieee80211_channel *chan;
 553         int ret = 0;
 554
 555         if (local->sta_sw_scanning) {
 556                 chan = local->scan_channel;
 557                 mode = local->scan_hw_mode;
 558         } else {
 559                 chan = local->oper_channel;
 560                 mode = local->oper_hw_mode;
 561         }
 562
 563         local->hw.conf.channel = chan->chan;
 564         local->hw.conf.channel_val = chan->val;
 565         if (!local->hw.conf.power_level) {
 566                 local->hw.conf.power_level = chan->power_level;
 567         } else {
 568                 local->hw.conf.power_level = min(chan->power_level,
 569                                                  local->hw.conf.power_level);
 570         }
 571         local->hw.conf.freq = chan->freq;
 572         local->hw.conf.phymode = mode->mode;
 573         local->hw.conf.antenna_max = chan->antenna_max;
 574         local->hw.conf.chan = chan;
 575         local->hw.conf.mode = mode;
 576
 577 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 578         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 579                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 580                local->hw.conf.phymode);
 581 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 582
 583         if (local->open_count)
 584                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 585
 586         return ret;
 587 }
 588
 589 /**
 590  * ieee80211_hw_config_ht should be used only after legacy configuration
 591  * has been determined, as ht configuration depends upon the hardware's
 592  * HT abilities for a _specific_ band.
 593  */
 594 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 595                            struct ieee80211_ht_info *req_ht_cap,
 596                            struct ieee80211_ht_bss_info *req_bss_cap)
 597 {
 598         struct ieee80211_conf *conf = &local->hw.conf;
 599         struct ieee80211_hw_mode *mode = conf->mode;
 600         int i;
 601
 602         /* HT is not supported */
 603         if (!mode->ht_info.ht_supported) {
 604                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 605                 return -EOPNOTSUPP;
 606         }
 607
 608         /* disable HT */
 609         if (!enable_ht) {
 610                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 611         } else {
 612                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
 613                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
 614                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
 615                 conf->ht_conf.cap |=
 616                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
 617                 conf->ht_bss_conf.primary_channel =
 618                         req_bss_cap->primary_channel;
 619                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
 620                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
 621                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
 622                         conf->ht_conf.supp_mcs_set[i] =
 623                                 mode->ht_info.supp_mcs_set[i] &
 624                                   req_ht_cap->supp_mcs_set[i];
 625
 626                 /* In STA mode, this gives us indication
 627                  * to the AP's mode of operation */
 628                 conf->ht_conf.ht_supported = 1;
 629                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
 630                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
 631         }
 632
 633         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
 634
 635         return 0;
 636 }
 637
 638 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 639                                       u32 changed)
 640 {
 641         struct ieee80211_local *local = sdata->local;
 642
 643         if (!changed)
 644                 return;
 645
 646         if (local->ops->bss_info_changed)
 647                 local->ops->bss_info_changed(local_to_hw(local),
 648                                              &sdata->vif,
 649                                              &sdata->bss_conf,
 650                                              changed);
 651 }
 652
 653 void ieee80211_reset_erp_info(struct net_device *dev)
 654 {
 655         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 656
 657         sdata->bss_conf.use_cts_prot = 0;
 658         sdata->bss_conf.use_short_preamble = 0;
 659         ieee80211_bss_info_change_notify(sdata,
 660                                          BSS_CHANGED_ERP_CTS_PROT |
 661                                          BSS_CHANGED_ERP_PREAMBLE);
 662 }
 663
 664 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 665                                  struct sk_buff *skb,
 666                                  struct ieee80211_tx_status *status)
 667 {
 668         struct ieee80211_local *local = hw_to_local(hw);
 669         struct ieee80211_tx_status *saved;
 670         int tmp;
 671
 672         skb->dev = local->mdev;
 673         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 674         if (unlikely(!saved)) {
 675                 if (net_ratelimit())
 676                         printk(KERN_WARNING "%s: Not enough memory, "
 677                                "dropping tx status", skb->dev->name);
 678                 /* should be dev_kfree_skb_irq, but due to this function being
 679                  * named _irqsafe instead of just _irq we can't be sure that
 680                  * people won't call it from non-irq contexts */
 681                 dev_kfree_skb_any(skb);
 682                 return;
 683         }
 684         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 685         /* copy pointer to saved status into skb->cb for use by tasklet */
 686         memcpy(skb->cb, &saved, sizeof(saved));
 687
 688         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 689         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 690                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 691         tmp = skb_queue_len(&local->skb_queue) +
 692                 skb_queue_len(&local->skb_queue_unreliable);
 693         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 694                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 695                 memcpy(&saved, skb->cb, sizeof(saved));
 696                 kfree(saved);
 697                 dev_kfree_skb_irq(skb);
 698                 tmp--;
 699                 I802_DEBUG_INC(local->tx_status_drop);
 700         }
 701         tasklet_schedule(&local->tasklet);
 702 }
 703 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 704
 705 static void ieee80211_tasklet_handler(unsigned long data)
 706 {
 707         struct ieee80211_local *local = (struct ieee80211_local *) data;
 708         struct sk_buff *skb;
 709         struct ieee80211_rx_status rx_status;
 710         struct ieee80211_tx_status *tx_status;
 711
 712         while ((skb = skb_dequeue(&local->skb_queue)) ||
 713                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 714                 switch (skb->pkt_type) {
 715                 case IEEE80211_RX_MSG:
 716                         /* status is in skb->cb */
 717                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 718                         /* Clear skb->pkt_type in order to not confuse kernel
 719                          * netstack. */
 720                         skb->pkt_type = 0;
 721                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 722                         break;
 723                 case IEEE80211_TX_STATUS_MSG:
 724                         /* get pointer to saved status out of skb->cb */
 725                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 726                         skb->pkt_type = 0;
 727                         ieee80211_tx_status(local_to_hw(local),
 728                                             skb, tx_status);
 729                         kfree(tx_status);
 730                         break;
 731                 default: /* should never get here! */
 732                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 733                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 734                         dev_kfree_skb(skb);
 735                         break;
 736                 }
 737         }
 738 }
 739
 740 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 741  * make a prepared TX frame (one that has been given to hw) to look like brand
 742  * new IEEE 802.11 frame that is ready to go through TX processing again.
 743  * Also, tx_packet_data in cb is restored from tx_control. */
 744 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 745                                       struct ieee80211_key *key,
 746                                       struct sk_buff *skb,
 747                                       struct ieee80211_tx_control *control)
 748 {
 749         int hdrlen, iv_len, mic_len;
 750         struct ieee80211_tx_packet_data *pkt_data;
 751
 752         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 753         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
 754         pkt_data->flags = 0;
 755         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 756                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 757         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 758                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 759         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 760                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 761         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 762                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 763         pkt_data->queue = control->queue;
 764
 765         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 766
 767         if (!key)
 768                 goto no_key;
 769
 770         switch (key->conf.alg) {
 771         case ALG_WEP:
 772                 iv_len = WEP_IV_LEN;
 773                 mic_len = WEP_ICV_LEN;
 774                 break;
 775         case ALG_TKIP:
 776                 iv_len = TKIP_IV_LEN;
 777                 mic_len = TKIP_ICV_LEN;
 778                 break;
 779         case ALG_CCMP:
 780                 iv_len = CCMP_HDR_LEN;
 781                 mic_len = CCMP_MIC_LEN;
 782                 break;
 783         default:
 784                 goto no_key;
 785         }
 786
 787         if (skb->len >= mic_len &&
 788             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 789                 skb_trim(skb, skb->len - mic_len);
 790         if (skb->len >= iv_len && skb->len > hdrlen) {
 791                 memmove(skb->data + iv_len, skb->data, hdrlen);
 792                 skb_pull(skb, iv_len);
 793         }
 794
 795 no_key:
 796         {
 797                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 798                 u16 fc = le16_to_cpu(hdr->frame_control);
 799                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 800                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 801                         hdr->frame_control = cpu_to_le16(fc);
 802                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 803                         skb_pull(skb, 2);
 804                 }
 805         }
 806 }
 807
 808 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 809                          struct ieee80211_tx_status *status)
 810 {
 811         struct sk_buff *skb2;
 812         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 813         struct ieee80211_local *local = hw_to_local(hw);
 814         u16 frag, type;
 815         struct ieee80211_tx_status_rtap_hdr *rthdr;
 816         struct ieee80211_sub_if_data *sdata;
 817         int monitors;
 818
 819         if (!status) {
 820                 printk(KERN_ERR
 821                        "%s: ieee80211_tx_status called with NULL status\n",
 822                        wiphy_name(local->hw.wiphy));
 823                 dev_kfree_skb(skb);
 824                 return;
 825         }
 826
 827         if (status->excessive_retries) {
 828                 struct sta_info *sta;
 829                 sta = sta_info_get(local, hdr->addr1);
 830                 if (sta) {
 831                         if (sta->flags & WLAN_STA_PS) {
 832                                 /* The STA is in power save mode, so assume
 833                                  * that this TX packet failed because of that.
 834                                  */
 835                                 status->excessive_retries = 0;
 836                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 837                         }
 838                         sta_info_put(sta);
 839                 }
 840         }
 841
 842         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 843                 struct sta_info *sta;
 844                 sta = sta_info_get(local, hdr->addr1);
 845                 if (sta) {
 846                         sta->tx_filtered_count++;
 847
 848                         /* Clear the TX filter mask for this STA when sending
 849                          * the next packet. If the STA went to power save mode,
 850                          * this will happen when it is waking up for the next
 851                          * time. */
 852                         sta->clear_dst_mask = 1;
 853
 854                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 855                          * the race between RX and TX status causing some
 856                          * packets to be filtered out before 80211.o gets an
 857                          * update for PS status? This seems to be the case, so
 858                          * no changes are likely to be needed. */
 859                         if (sta->flags & WLAN_STA_PS &&
 860                             skb_queue_len(&sta->tx_filtered) <
 861                             STA_MAX_TX_BUFFER) {
 862                                 ieee80211_remove_tx_extra(local, sta->key,
 863                                                           skb,
 864                                                           &status->control);
 865                                 skb_queue_tail(&sta->tx_filtered, skb);
 866                         } else if (!(sta->flags & WLAN_STA_PS) &&
 867                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 868                                 /* Software retry the packet once */
 869                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 870                                 ieee80211_remove_tx_extra(local, sta->key,
 871                                                           skb,
 872                                                           &status->control);
 873                                 dev_queue_xmit(skb);
 874                         } else {
 875                                 if (net_ratelimit()) {
 876                                         printk(KERN_DEBUG "%s: dropped TX "
 877                                                "filtered frame queue_len=%d "
 878                                                "PS=%d @%lu\n",
 879                                                wiphy_name(local->hw.wiphy),
 880                                                skb_queue_len(
 881                                                        &sta->tx_filtered),
 882                                                !!(sta->flags & WLAN_STA_PS),
 883                                                jiffies);
 884                                 }
 885                                 dev_kfree_skb(skb);
 886                         }
 887                         sta_info_put(sta);
 888                         return;
 889                 }
 890         } else
 891                 rate_control_tx_status(local->mdev, skb, status);
 892
 893         ieee80211_led_tx(local, 0);
 894
 895         /* SNMP counters
 896          * Fragments are passed to low-level drivers as separate skbs, so these
 897          * are actually fragments, not frames. Update frame counters only for
 898          * the first fragment of the frame. */
 899
 900         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 901         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 902
 903         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 904                 if (frag == 0) {
 905                         local->dot11TransmittedFrameCount++;
 906                         if (is_multicast_ether_addr(hdr->addr1))
 907                                 local->dot11MulticastTransmittedFrameCount++;
 908                         if (status->retry_count > 0)
 909                                 local->dot11RetryCount++;
 910                         if (status->retry_count > 1)
 911                                 local->dot11MultipleRetryCount++;
 912                 }
 913
 914                 /* This counter shall be incremented for an acknowledged MPDU
 915                  * with an individual address in the address 1 field or an MPDU
 916                  * with a multicast address in the address 1 field of type Data
 917                  * or Management. */
 918                 if (!is_multicast_ether_addr(hdr->addr1) ||
 919                     type == IEEE80211_FTYPE_DATA ||
 920                     type == IEEE80211_FTYPE_MGMT)
 921                         local->dot11TransmittedFragmentCount++;
 922         } else {
 923                 if (frag == 0)
 924                         local->dot11FailedCount++;
 925         }
 926
 927         /* this was a transmitted frame, but now we want to reuse it */
 928         skb_orphan(skb);
 929
 930         if (!local->monitors) {
 931                 dev_kfree_skb(skb);
 932                 return;
 933         }
 934
 935         /* send frame to monitor interfaces now */
 936
 937         if (skb_headroom(skb) < sizeof(*rthdr)) {
 938                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 939                 dev_kfree_skb(skb);
 940                 return;
 941         }
 942
 943         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 944                                 skb_push(skb, sizeof(*rthdr));
 945
 946         memset(rthdr, 0, sizeof(*rthdr));
 947         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 948         rthdr->hdr.it_present =
 949                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 950                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 951
 952         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 953             !is_multicast_ether_addr(hdr->addr1))
 954                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 955
 956         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 957             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 958                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 959         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 960                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 961
 962         rthdr->data_retries = status->retry_count;
 963
 964         rcu_read_lock();
 965         monitors = local->monitors;
 966         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 967                 /*
 968                  * Using the monitors counter is possibly racy, but
 969                  * if the value is wrong we simply either clone the skb
 970                  * once too much or forget sending it to one monitor iface
 971                  * The latter case isn't nice but fixing the race is much
 972                  * more complicated.
 973                  */
 974                 if (!monitors || !skb)
 975                         goto out;
 976
 977                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
 978                         if (!netif_running(sdata->dev))
 979                                 continue;
 980                         monitors--;
 981                         if (monitors)
 982                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 983                         else
 984                                 skb2 = NULL;
 985                         skb->dev = sdata->dev;
 986                         /* XXX: is this sufficient for BPF? */
 987                         skb_set_mac_header(skb, 0);
 988                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 989                         skb->pkt_type = PACKET_OTHERHOST;
 990                         skb->protocol = htons(ETH_P_802_2);
 991                         memset(skb->cb, 0, sizeof(skb->cb));
 992                         netif_rx(skb);
 993                         skb = skb2;
 994                 }
 995         }
 996  out:
 997         rcu_read_unlock();
 998         if (skb)
 999                 dev_kfree_skb(skb);
1000 }
1001 EXPORT_SYMBOL(ieee80211_tx_status);
1002
1003 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1004                                         const struct ieee80211_ops *ops)
1005 {
1006         struct net_device *mdev;
1007         struct ieee80211_local *local;
1008         struct ieee80211_sub_if_data *sdata;
1009         int priv_size;
1010         struct wiphy *wiphy;
1011
1012         /* Ensure 32-byte alignment of our private data and hw private data.
1013          * We use the wiphy priv data for both our ieee80211_local and for
1014          * the driver's private data
1015          *
1016          * In memory it'll be like this:
1017          *
1018          * +-------------------------+
1019          * | struct wiphy           |
1020          * +-------------------------+
1021          * | struct ieee80211_local  |
1022          * +-------------------------+
1023          * | driver's private data   |
1024          * +-------------------------+
1025          *
1026          */
1027         priv_size = ((sizeof(struct ieee80211_local) +
1028                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1029                     priv_data_len;
1030
1031         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1032
1033         if (!wiphy)
1034                 return NULL;
1035
1036         wiphy->privid = mac80211_wiphy_privid;
1037
1038         local = wiphy_priv(wiphy);
1039         local->hw.wiphy = wiphy;
1040
1041         local->hw.priv = (char *)local +
1042                          ((sizeof(struct ieee80211_local) +
1043                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1044
1045         BUG_ON(!ops->tx);
1046         BUG_ON(!ops->start);
1047         BUG_ON(!ops->stop);
1048         BUG_ON(!ops->config);
1049         BUG_ON(!ops->add_interface);
1050         BUG_ON(!ops->remove_interface);
1051         BUG_ON(!ops->configure_filter);
1052         local->ops = ops;
1053
1054         /* for now, mdev needs sub_if_data :/ */
1055         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1056                             "wmaster%d", ether_setup);
1057         if (!mdev) {
1058                 wiphy_free(wiphy);
1059                 return NULL;
1060         }
1061
1062         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1063         mdev->ieee80211_ptr = &sdata->wdev;
1064         sdata->wdev.wiphy = wiphy;
1065
1066         local->hw.queues = 1; /* default */
1067
1068         local->mdev = mdev;
1069         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1070         local->rx_handlers = ieee80211_rx_handlers;
1071         local->tx_handlers = ieee80211_tx_handlers;
1072
1073         local->bridge_packets = 1;
1074
1075         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1076         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1077         local->short_retry_limit = 7;
1078         local->long_retry_limit = 4;
1079         local->hw.conf.radio_enabled = 1;
1080
1081         local->enabled_modes = ~0;
1082
1083         INIT_LIST_HEAD(&local->modes_list);
1084
1085         INIT_LIST_HEAD(&local->interfaces);
1086
1087         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1088         ieee80211_rx_bss_list_init(mdev);
1089
1090         sta_info_init(local);
1091
1092         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1093         mdev->open = ieee80211_master_open;
1094         mdev->stop = ieee80211_master_stop;
1095         mdev->type = ARPHRD_IEEE80211;
1096         mdev->header_ops = &ieee80211_header_ops;
1097         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1098
1099         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1100         sdata->dev = mdev;
1101         sdata->local = local;
1102         sdata->u.ap.force_unicast_rateidx = -1;
1103         sdata->u.ap.max_ratectrl_rateidx = -1;
1104         ieee80211_if_sdata_init(sdata);
1105         /* no RCU needed since we're still during init phase */
1106         list_add_tail(&sdata->list, &local->interfaces);
1107
1108         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1109                      (unsigned long)local);
1110         tasklet_disable(&local->tx_pending_tasklet);
1111
1112         tasklet_init(&local->tasklet,
1113                      ieee80211_tasklet_handler,
1114                      (unsigned long) local);
1115         tasklet_disable(&local->tasklet);
1116
1117         skb_queue_head_init(&local->skb_queue);
1118         skb_queue_head_init(&local->skb_queue_unreliable);
1119
1120         return local_to_hw(local);
1121 }
1122 EXPORT_SYMBOL(ieee80211_alloc_hw);
1123
1124 int ieee80211_register_hw(struct ieee80211_hw *hw)
1125 {
1126         struct ieee80211_local *local = hw_to_local(hw);
1127         const char *name;
1128         int result;
1129
1130         result = wiphy_register(local->hw.wiphy);
1131         if (result < 0)
1132                 return result;
1133
1134         name = wiphy_dev(local->hw.wiphy)->driver->name;
1135         local->hw.workqueue = create_singlethread_workqueue(name);
1136         if (!local->hw.workqueue) {
1137                 result = -ENOMEM;
1138                 goto fail_workqueue;
1139         }
1140
1141         /*
1142          * The hardware needs headroom for sending the frame,
1143          * and we need some headroom for passing the frame to monitor
1144          * interfaces, but never both at the same time.
1145          */
1146         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1147                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1148
1149         debugfs_hw_add(local);
1150
1151         local->hw.conf.beacon_int = 1000;
1152
1153         local->wstats_flags |= local->hw.max_rssi ?
1154                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1155         local->wstats_flags |= local->hw.max_signal ?
1156                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1157         local->wstats_flags |= local->hw.max_noise ?
1158                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1159         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1160                 local->wstats_flags |= IW_QUAL_DBM;
1161
1162         result = sta_info_start(local);
1163         if (result < 0)
1164                 goto fail_sta_info;
1165
1166         rtnl_lock();
1167         result = dev_alloc_name(local->mdev, local->mdev->name);
1168         if (result < 0)
1169                 goto fail_dev;
1170
1171         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1172         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1173
1174         result = register_netdevice(local->mdev);
1175         if (result < 0)
1176                 goto fail_dev;
1177
1178         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1179         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1180
1181         result = ieee80211_init_rate_ctrl_alg(local,
1182                                               hw->rate_control_algorithm);
1183         if (result < 0) {
1184                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1185                        "algorithm\n", wiphy_name(local->hw.wiphy));
1186                 goto fail_rate;
1187         }
1188
1189         result = ieee80211_wep_init(local);
1190
1191         if (result < 0) {
1192                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1193                        wiphy_name(local->hw.wiphy));
1194                 goto fail_wep;
1195         }
1196
1197         ieee80211_install_qdisc(local->mdev);
1198
1199         /* add one default STA interface */
1200         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1201                                   IEEE80211_IF_TYPE_STA);
1202         if (result)
1203                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1204                        wiphy_name(local->hw.wiphy));
1205
1206         local->reg_state = IEEE80211_DEV_REGISTERED;
1207         rtnl_unlock();
1208
1209         ieee80211_led_init(local);
1210
1211         return 0;
1212
1213 fail_wep:
1214         rate_control_deinitialize(local);
1215 fail_rate:
1216         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1217         unregister_netdevice(local->mdev);
1218 fail_dev:
1219         rtnl_unlock();
1220         sta_info_stop(local);
1221 fail_sta_info:
1222         debugfs_hw_del(local);
1223         destroy_workqueue(local->hw.workqueue);
1224 fail_workqueue:
1225         wiphy_unregister(local->hw.wiphy);
1226         return result;
1227 }
1228 EXPORT_SYMBOL(ieee80211_register_hw);
1229
1230 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1231                               struct ieee80211_hw_mode *mode)
1232 {
1233         struct ieee80211_local *local = hw_to_local(hw);
1234         struct ieee80211_rate *rate;
1235         int i;
1236
1237         INIT_LIST_HEAD(&mode->list);
1238         list_add_tail(&mode->list, &local->modes_list);
1239
1240         local->hw_modes |= (1 << mode->mode);
1241         for (i = 0; i < mode->num_rates; i++) {
1242                 rate = &(mode->rates[i]);
1243                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1244         }
1245         ieee80211_prepare_rates(local, mode);
1246
1247         if (!local->oper_hw_mode) {
1248                 /* Default to this mode */
1249                 local->hw.conf.phymode = mode->mode;
1250                 local->oper_hw_mode = local->scan_hw_mode = mode;
1251                 local->oper_channel = local->scan_channel = &mode->channels[0];
1252                 local->hw.conf.mode = local->oper_hw_mode;
1253                 local->hw.conf.chan = local->oper_channel;
1254         }
1255
1256         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1257                 ieee80211_set_default_regdomain(mode);
1258
1259         return 0;
1260 }
1261 EXPORT_SYMBOL(ieee80211_register_hwmode);
1262
1263 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1264 {
1265         struct ieee80211_local *local = hw_to_local(hw);
1266         struct ieee80211_sub_if_data *sdata, *tmp;
1267         int i;
1268
1269         tasklet_kill(&local->tx_pending_tasklet);
1270         tasklet_kill(&local->tasklet);
1271
1272         rtnl_lock();
1273
1274         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1275
1276         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1277
1278         /*
1279          * At this point, interface list manipulations are fine
1280          * because the driver cannot be handing us frames any
1281          * more and the tasklet is killed.
1282          */
1283
1284         /*
1285          * First, we remove all non-master interfaces. Do this because they
1286          * may have bss pointer dependency on the master, and when we free
1287          * the master these would be freed as well, breaking our list
1288          * iteration completely.
1289          */
1290         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1291                 if (sdata->dev == local->mdev)
1292                         continue;
1293                 list_del(&sdata->list);
1294                 __ieee80211_if_del(local, sdata);
1295         }
1296
1297         /* then, finally, remove the master interface */
1298         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1299
1300         rtnl_unlock();
1301
1302         ieee80211_rx_bss_list_deinit(local->mdev);
1303         ieee80211_clear_tx_pending(local);
1304         sta_info_stop(local);
1305         rate_control_deinitialize(local);
1306         debugfs_hw_del(local);
1307
1308         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1309                 kfree(local->supp_rates[i]);
1310                 kfree(local->basic_rates[i]);
1311         }
1312
1313         if (skb_queue_len(&local->skb_queue)
1314                         || skb_queue_len(&local->skb_queue_unreliable))
1315                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1316                        wiphy_name(local->hw.wiphy));
1317         skb_queue_purge(&local->skb_queue);
1318         skb_queue_purge(&local->skb_queue_unreliable);
1319
1320         destroy_workqueue(local->hw.workqueue);
1321         wiphy_unregister(local->hw.wiphy);
1322         ieee80211_wep_free(local);
1323         ieee80211_led_exit(local);
1324 }
1325 EXPORT_SYMBOL(ieee80211_unregister_hw);
1326
1327 void ieee80211_free_hw(struct ieee80211_hw *hw)
1328 {
1329         struct ieee80211_local *local = hw_to_local(hw);
1330
1331         ieee80211_if_free(local->mdev);
1332         wiphy_free(local->hw.wiphy);
1333 }
1334 EXPORT_SYMBOL(ieee80211_free_hw);
1335
1336 static int __init ieee80211_init(void)
1337 {
1338         struct sk_buff *skb;
1339         int ret;
1340
1341         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1342
1343         ret = rc80211_simple_init();
1344         if (ret)
1345                 goto fail;
1346
1347         ret = rc80211_pid_init();
1348         if (ret)
1349                 goto fail_simple;
1350
1351         ret = ieee80211_wme_register();
1352         if (ret) {
1353                 printk(KERN_DEBUG "ieee80211_init: failed to "
1354                        "initialize WME (err=%d)\n", ret);
1355                 goto fail_pid;
1356         }
1357
1358         ieee80211_debugfs_netdev_init();
1359         ieee80211_regdomain_init();
1360
1361         return 0;
1362
1363  fail_pid:
1364         rc80211_simple_exit();
1365  fail_simple:
1366         rc80211_pid_exit();
1367  fail:
1368         return ret;
1369 }
1370
1371 static void __exit ieee80211_exit(void)
1372 {
1373         rc80211_simple_exit();
1374         rc80211_pid_exit();
1375
1376         ieee80211_wme_unregister();
1377         ieee80211_debugfs_netdev_exit();
1378 }
1379
1380
1381 subsys_initcall(ieee80211_init);
1382 module_exit(ieee80211_exit);
1383
1384 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1385 MODULE_LICENSE("GPL");