git.oblomov.eu 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_erp_info_change_notify(struct net_device *dev, u8 changes)
 639 {
 640         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 641         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 642         if (local->ops->erp_ie_changed)
 643                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 644                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 645                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 646 }
 647
 648 void ieee80211_reset_erp_info(struct net_device *dev)
 649 {
 650         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 651
 652         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 653                         IEEE80211_SDATA_SHORT_PREAMBLE);
 654         ieee80211_erp_info_change_notify(dev,
 655                                          IEEE80211_ERP_CHANGE_PROTECTION |
 656                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 657 }
 658
 659 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 660                                  struct sk_buff *skb,
 661                                  struct ieee80211_tx_status *status)
 662 {
 663         struct ieee80211_local *local = hw_to_local(hw);
 664         struct ieee80211_tx_status *saved;
 665         int tmp;
 666
 667         skb->dev = local->mdev;
 668         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 669         if (unlikely(!saved)) {
 670                 if (net_ratelimit())
 671                         printk(KERN_WARNING "%s: Not enough memory, "
 672                                "dropping tx status", skb->dev->name);
 673                 /* should be dev_kfree_skb_irq, but due to this function being
 674                  * named _irqsafe instead of just _irq we can't be sure that
 675                  * people won't call it from non-irq contexts */
 676                 dev_kfree_skb_any(skb);
 677                 return;
 678         }
 679         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 680         /* copy pointer to saved status into skb->cb for use by tasklet */
 681         memcpy(skb->cb, &saved, sizeof(saved));
 682
 683         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 684         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 685                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 686         tmp = skb_queue_len(&local->skb_queue) +
 687                 skb_queue_len(&local->skb_queue_unreliable);
 688         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 689                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 690                 memcpy(&saved, skb->cb, sizeof(saved));
 691                 kfree(saved);
 692                 dev_kfree_skb_irq(skb);
 693                 tmp--;
 694                 I802_DEBUG_INC(local->tx_status_drop);
 695         }
 696         tasklet_schedule(&local->tasklet);
 697 }
 698 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 699
 700 static void ieee80211_tasklet_handler(unsigned long data)
 701 {
 702         struct ieee80211_local *local = (struct ieee80211_local *) data;
 703         struct sk_buff *skb;
 704         struct ieee80211_rx_status rx_status;
 705         struct ieee80211_tx_status *tx_status;
 706
 707         while ((skb = skb_dequeue(&local->skb_queue)) ||
 708                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 709                 switch (skb->pkt_type) {
 710                 case IEEE80211_RX_MSG:
 711                         /* status is in skb->cb */
 712                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 713                         /* Clear skb->pkt_type in order to not confuse kernel
 714                          * netstack. */
 715                         skb->pkt_type = 0;
 716                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 717                         break;
 718                 case IEEE80211_TX_STATUS_MSG:
 719                         /* get pointer to saved status out of skb->cb */
 720                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 721                         skb->pkt_type = 0;
 722                         ieee80211_tx_status(local_to_hw(local),
 723                                             skb, tx_status);
 724                         kfree(tx_status);
 725                         break;
 726                 default: /* should never get here! */
 727                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 728                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 729                         dev_kfree_skb(skb);
 730                         break;
 731                 }
 732         }
 733 }
 734
 735 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 736  * make a prepared TX frame (one that has been given to hw) to look like brand
 737  * new IEEE 802.11 frame that is ready to go through TX processing again.
 738  * Also, tx_packet_data in cb is restored from tx_control. */
 739 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 740                                       struct ieee80211_key *key,
 741                                       struct sk_buff *skb,
 742                                       struct ieee80211_tx_control *control)
 743 {
 744         int hdrlen, iv_len, mic_len;
 745         struct ieee80211_tx_packet_data *pkt_data;
 746
 747         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 748         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
 749         pkt_data->flags = 0;
 750         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 751                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 752         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 753                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 754         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 755                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 756         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 757                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 758         pkt_data->queue = control->queue;
 759
 760         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 761
 762         if (!key)
 763                 goto no_key;
 764
 765         switch (key->conf.alg) {
 766         case ALG_WEP:
 767                 iv_len = WEP_IV_LEN;
 768                 mic_len = WEP_ICV_LEN;
 769                 break;
 770         case ALG_TKIP:
 771                 iv_len = TKIP_IV_LEN;
 772                 mic_len = TKIP_ICV_LEN;
 773                 break;
 774         case ALG_CCMP:
 775                 iv_len = CCMP_HDR_LEN;
 776                 mic_len = CCMP_MIC_LEN;
 777                 break;
 778         default:
 779                 goto no_key;
 780         }
 781
 782         if (skb->len >= mic_len &&
 783             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 784                 skb_trim(skb, skb->len - mic_len);
 785         if (skb->len >= iv_len && skb->len > hdrlen) {
 786                 memmove(skb->data + iv_len, skb->data, hdrlen);
 787                 skb_pull(skb, iv_len);
 788         }
 789
 790 no_key:
 791         {
 792                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 793                 u16 fc = le16_to_cpu(hdr->frame_control);
 794                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 795                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 796                         hdr->frame_control = cpu_to_le16(fc);
 797                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 798                         skb_pull(skb, 2);
 799                 }
 800         }
 801 }
 802
 803 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 804                          struct ieee80211_tx_status *status)
 805 {
 806         struct sk_buff *skb2;
 807         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 808         struct ieee80211_local *local = hw_to_local(hw);
 809         u16 frag, type;
 810         struct ieee80211_tx_status_rtap_hdr *rthdr;
 811         struct ieee80211_sub_if_data *sdata;
 812         int monitors;
 813
 814         if (!status) {
 815                 printk(KERN_ERR
 816                        "%s: ieee80211_tx_status called with NULL status\n",
 817                        wiphy_name(local->hw.wiphy));
 818                 dev_kfree_skb(skb);
 819                 return;
 820         }
 821
 822         if (status->excessive_retries) {
 823                 struct sta_info *sta;
 824                 sta = sta_info_get(local, hdr->addr1);
 825                 if (sta) {
 826                         if (sta->flags & WLAN_STA_PS) {
 827                                 /* The STA is in power save mode, so assume
 828                                  * that this TX packet failed because of that.
 829                                  */
 830                                 status->excessive_retries = 0;
 831                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 832                         }
 833                         sta_info_put(sta);
 834                 }
 835         }
 836
 837         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 838                 struct sta_info *sta;
 839                 sta = sta_info_get(local, hdr->addr1);
 840                 if (sta) {
 841                         sta->tx_filtered_count++;
 842
 843                         /* Clear the TX filter mask for this STA when sending
 844                          * the next packet. If the STA went to power save mode,
 845                          * this will happen when it is waking up for the next
 846                          * time. */
 847                         sta->clear_dst_mask = 1;
 848
 849                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 850                          * the race between RX and TX status causing some
 851                          * packets to be filtered out before 80211.o gets an
 852                          * update for PS status? This seems to be the case, so
 853                          * no changes are likely to be needed. */
 854                         if (sta->flags & WLAN_STA_PS &&
 855                             skb_queue_len(&sta->tx_filtered) <
 856                             STA_MAX_TX_BUFFER) {
 857                                 ieee80211_remove_tx_extra(local, sta->key,
 858                                                           skb,
 859                                                           &status->control);
 860                                 skb_queue_tail(&sta->tx_filtered, skb);
 861                         } else if (!(sta->flags & WLAN_STA_PS) &&
 862                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 863                                 /* Software retry the packet once */
 864                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 865                                 ieee80211_remove_tx_extra(local, sta->key,
 866                                                           skb,
 867                                                           &status->control);
 868                                 dev_queue_xmit(skb);
 869                         } else {
 870                                 if (net_ratelimit()) {
 871                                         printk(KERN_DEBUG "%s: dropped TX "
 872                                                "filtered frame queue_len=%d "
 873                                                "PS=%d @%lu\n",
 874                                                wiphy_name(local->hw.wiphy),
 875                                                skb_queue_len(
 876                                                        &sta->tx_filtered),
 877                                                !!(sta->flags & WLAN_STA_PS),
 878                                                jiffies);
 879                                 }
 880                                 dev_kfree_skb(skb);
 881                         }
 882                         sta_info_put(sta);
 883                         return;
 884                 }
 885         } else
 886                 rate_control_tx_status(local->mdev, skb, status);
 887
 888         ieee80211_led_tx(local, 0);
 889
 890         /* SNMP counters
 891          * Fragments are passed to low-level drivers as separate skbs, so these
 892          * are actually fragments, not frames. Update frame counters only for
 893          * the first fragment of the frame. */
 894
 895         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 896         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 897
 898         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 899                 if (frag == 0) {
 900                         local->dot11TransmittedFrameCount++;
 901                         if (is_multicast_ether_addr(hdr->addr1))
 902                                 local->dot11MulticastTransmittedFrameCount++;
 903                         if (status->retry_count > 0)
 904                                 local->dot11RetryCount++;
 905                         if (status->retry_count > 1)
 906                                 local->dot11MultipleRetryCount++;
 907                 }
 908
 909                 /* This counter shall be incremented for an acknowledged MPDU
 910                  * with an individual address in the address 1 field or an MPDU
 911                  * with a multicast address in the address 1 field of type Data
 912                  * or Management. */
 913                 if (!is_multicast_ether_addr(hdr->addr1) ||
 914                     type == IEEE80211_FTYPE_DATA ||
 915                     type == IEEE80211_FTYPE_MGMT)
 916                         local->dot11TransmittedFragmentCount++;
 917         } else {
 918                 if (frag == 0)
 919                         local->dot11FailedCount++;
 920         }
 921
 922         /* this was a transmitted frame, but now we want to reuse it */
 923         skb_orphan(skb);
 924
 925         if (!local->monitors) {
 926                 dev_kfree_skb(skb);
 927                 return;
 928         }
 929
 930         /* send frame to monitor interfaces now */
 931
 932         if (skb_headroom(skb) < sizeof(*rthdr)) {
 933                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 934                 dev_kfree_skb(skb);
 935                 return;
 936         }
 937
 938         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 939                                 skb_push(skb, sizeof(*rthdr));
 940
 941         memset(rthdr, 0, sizeof(*rthdr));
 942         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 943         rthdr->hdr.it_present =
 944                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 945                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 946
 947         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 948             !is_multicast_ether_addr(hdr->addr1))
 949                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 950
 951         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 952             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 953                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 954         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 955                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 956
 957         rthdr->data_retries = status->retry_count;
 958
 959         rcu_read_lock();
 960         monitors = local->monitors;
 961         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 962                 /*
 963                  * Using the monitors counter is possibly racy, but
 964                  * if the value is wrong we simply either clone the skb
 965                  * once too much or forget sending it to one monitor iface
 966                  * The latter case isn't nice but fixing the race is much
 967                  * more complicated.
 968                  */
 969                 if (!monitors || !skb)
 970                         goto out;
 971
 972                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
 973                         if (!netif_running(sdata->dev))
 974                                 continue;
 975                         monitors--;
 976                         if (monitors)
 977                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 978                         else
 979                                 skb2 = NULL;
 980                         skb->dev = sdata->dev;
 981                         /* XXX: is this sufficient for BPF? */
 982                         skb_set_mac_header(skb, 0);
 983                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 984                         skb->pkt_type = PACKET_OTHERHOST;
 985                         skb->protocol = htons(ETH_P_802_2);
 986                         memset(skb->cb, 0, sizeof(skb->cb));
 987                         netif_rx(skb);
 988                         skb = skb2;
 989                 }
 990         }
 991  out:
 992         rcu_read_unlock();
 993         if (skb)
 994                 dev_kfree_skb(skb);
 995 }
 996 EXPORT_SYMBOL(ieee80211_tx_status);
 997
 998 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 999                                         const struct ieee80211_ops *ops)
1000 {
1001         struct net_device *mdev;
1002         struct ieee80211_local *local;
1003         struct ieee80211_sub_if_data *sdata;
1004         int priv_size;
1005         struct wiphy *wiphy;
1006
1007         /* Ensure 32-byte alignment of our private data and hw private data.
1008          * We use the wiphy priv data for both our ieee80211_local and for
1009          * the driver's private data
1010          *
1011          * In memory it'll be like this:
1012          *
1013          * +-------------------------+
1014          * | struct wiphy           |
1015          * +-------------------------+
1016          * | struct ieee80211_local  |
1017          * +-------------------------+
1018          * | driver's private data   |
1019          * +-------------------------+
1020          *
1021          */
1022         priv_size = ((sizeof(struct ieee80211_local) +
1023                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1024                     priv_data_len;
1025
1026         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1027
1028         if (!wiphy)
1029                 return NULL;
1030
1031         wiphy->privid = mac80211_wiphy_privid;
1032
1033         local = wiphy_priv(wiphy);
1034         local->hw.wiphy = wiphy;
1035
1036         local->hw.priv = (char *)local +
1037                          ((sizeof(struct ieee80211_local) +
1038                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1039
1040         BUG_ON(!ops->tx);
1041         BUG_ON(!ops->start);
1042         BUG_ON(!ops->stop);
1043         BUG_ON(!ops->config);
1044         BUG_ON(!ops->add_interface);
1045         BUG_ON(!ops->remove_interface);
1046         BUG_ON(!ops->configure_filter);
1047         local->ops = ops;
1048
1049         /* for now, mdev needs sub_if_data :/ */
1050         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1051                             "wmaster%d", ether_setup);
1052         if (!mdev) {
1053                 wiphy_free(wiphy);
1054                 return NULL;
1055         }
1056
1057         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1058         mdev->ieee80211_ptr = &sdata->wdev;
1059         sdata->wdev.wiphy = wiphy;
1060
1061         local->hw.queues = 1; /* default */
1062
1063         local->mdev = mdev;
1064         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1065         local->rx_handlers = ieee80211_rx_handlers;
1066         local->tx_handlers = ieee80211_tx_handlers;
1067
1068         local->bridge_packets = 1;
1069
1070         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1071         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1072         local->short_retry_limit = 7;
1073         local->long_retry_limit = 4;
1074         local->hw.conf.radio_enabled = 1;
1075
1076         local->enabled_modes = ~0;
1077
1078         INIT_LIST_HEAD(&local->modes_list);
1079
1080         INIT_LIST_HEAD(&local->interfaces);
1081
1082         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1083         ieee80211_rx_bss_list_init(mdev);
1084
1085         sta_info_init(local);
1086
1087         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1088         mdev->open = ieee80211_master_open;
1089         mdev->stop = ieee80211_master_stop;
1090         mdev->type = ARPHRD_IEEE80211;
1091         mdev->header_ops = &ieee80211_header_ops;
1092         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1093
1094         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1095         sdata->dev = mdev;
1096         sdata->local = local;
1097         sdata->u.ap.force_unicast_rateidx = -1;
1098         sdata->u.ap.max_ratectrl_rateidx = -1;
1099         ieee80211_if_sdata_init(sdata);
1100         /* no RCU needed since we're still during init phase */
1101         list_add_tail(&sdata->list, &local->interfaces);
1102
1103         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1104                      (unsigned long)local);
1105         tasklet_disable(&local->tx_pending_tasklet);
1106
1107         tasklet_init(&local->tasklet,
1108                      ieee80211_tasklet_handler,
1109                      (unsigned long) local);
1110         tasklet_disable(&local->tasklet);
1111
1112         skb_queue_head_init(&local->skb_queue);
1113         skb_queue_head_init(&local->skb_queue_unreliable);
1114
1115         return local_to_hw(local);
1116 }
1117 EXPORT_SYMBOL(ieee80211_alloc_hw);
1118
1119 int ieee80211_register_hw(struct ieee80211_hw *hw)
1120 {
1121         struct ieee80211_local *local = hw_to_local(hw);
1122         const char *name;
1123         int result;
1124
1125         result = wiphy_register(local->hw.wiphy);
1126         if (result < 0)
1127                 return result;
1128
1129         name = wiphy_dev(local->hw.wiphy)->driver->name;
1130         local->hw.workqueue = create_singlethread_workqueue(name);
1131         if (!local->hw.workqueue) {
1132                 result = -ENOMEM;
1133                 goto fail_workqueue;
1134         }
1135
1136         /*
1137          * The hardware needs headroom for sending the frame,
1138          * and we need some headroom for passing the frame to monitor
1139          * interfaces, but never both at the same time.
1140          */
1141         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1142                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1143
1144         debugfs_hw_add(local);
1145
1146         local->hw.conf.beacon_int = 1000;
1147
1148         local->wstats_flags |= local->hw.max_rssi ?
1149                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1150         local->wstats_flags |= local->hw.max_signal ?
1151                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1152         local->wstats_flags |= local->hw.max_noise ?
1153                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1154         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1155                 local->wstats_flags |= IW_QUAL_DBM;
1156
1157         result = sta_info_start(local);
1158         if (result < 0)
1159                 goto fail_sta_info;
1160
1161         rtnl_lock();
1162         result = dev_alloc_name(local->mdev, local->mdev->name);
1163         if (result < 0)
1164                 goto fail_dev;
1165
1166         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1167         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1168
1169         result = register_netdevice(local->mdev);
1170         if (result < 0)
1171                 goto fail_dev;
1172
1173         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1174         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1175
1176         result = ieee80211_init_rate_ctrl_alg(local,
1177                                               hw->rate_control_algorithm);
1178         if (result < 0) {
1179                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1180                        "algorithm\n", wiphy_name(local->hw.wiphy));
1181                 goto fail_rate;
1182         }
1183
1184         result = ieee80211_wep_init(local);
1185
1186         if (result < 0) {
1187                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1188                        wiphy_name(local->hw.wiphy));
1189                 goto fail_wep;
1190         }
1191
1192         ieee80211_install_qdisc(local->mdev);
1193
1194         /* add one default STA interface */
1195         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1196                                   IEEE80211_IF_TYPE_STA);
1197         if (result)
1198                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1199                        wiphy_name(local->hw.wiphy));
1200
1201         local->reg_state = IEEE80211_DEV_REGISTERED;
1202         rtnl_unlock();
1203
1204         ieee80211_led_init(local);
1205
1206         return 0;
1207
1208 fail_wep:
1209         rate_control_deinitialize(local);
1210 fail_rate:
1211         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1212         unregister_netdevice(local->mdev);
1213 fail_dev:
1214         rtnl_unlock();
1215         sta_info_stop(local);
1216 fail_sta_info:
1217         debugfs_hw_del(local);
1218         destroy_workqueue(local->hw.workqueue);
1219 fail_workqueue:
1220         wiphy_unregister(local->hw.wiphy);
1221         return result;
1222 }
1223 EXPORT_SYMBOL(ieee80211_register_hw);
1224
1225 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1226                               struct ieee80211_hw_mode *mode)
1227 {
1228         struct ieee80211_local *local = hw_to_local(hw);
1229         struct ieee80211_rate *rate;
1230         int i;
1231
1232         INIT_LIST_HEAD(&mode->list);
1233         list_add_tail(&mode->list, &local->modes_list);
1234
1235         local->hw_modes |= (1 << mode->mode);
1236         for (i = 0; i < mode->num_rates; i++) {
1237                 rate = &(mode->rates[i]);
1238                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1239         }
1240         ieee80211_prepare_rates(local, mode);
1241
1242         if (!local->oper_hw_mode) {
1243                 /* Default to this mode */
1244                 local->hw.conf.phymode = mode->mode;
1245                 local->oper_hw_mode = local->scan_hw_mode = mode;
1246                 local->oper_channel = local->scan_channel = &mode->channels[0];
1247                 local->hw.conf.mode = local->oper_hw_mode;
1248                 local->hw.conf.chan = local->oper_channel;
1249         }
1250
1251         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1252                 ieee80211_set_default_regdomain(mode);
1253
1254         return 0;
1255 }
1256 EXPORT_SYMBOL(ieee80211_register_hwmode);
1257
1258 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1259 {
1260         struct ieee80211_local *local = hw_to_local(hw);
1261         struct ieee80211_sub_if_data *sdata, *tmp;
1262         int i;
1263
1264         tasklet_kill(&local->tx_pending_tasklet);
1265         tasklet_kill(&local->tasklet);
1266
1267         rtnl_lock();
1268
1269         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1270
1271         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1272
1273         /*
1274          * At this point, interface list manipulations are fine
1275          * because the driver cannot be handing us frames any
1276          * more and the tasklet is killed.
1277          */
1278
1279         /*
1280          * First, we remove all non-master interfaces. Do this because they
1281          * may have bss pointer dependency on the master, and when we free
1282          * the master these would be freed as well, breaking our list
1283          * iteration completely.
1284          */
1285         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1286                 if (sdata->dev == local->mdev)
1287                         continue;
1288                 list_del(&sdata->list);
1289                 __ieee80211_if_del(local, sdata);
1290         }
1291
1292         /* then, finally, remove the master interface */
1293         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1294
1295         rtnl_unlock();
1296
1297         ieee80211_rx_bss_list_deinit(local->mdev);
1298         ieee80211_clear_tx_pending(local);
1299         sta_info_stop(local);
1300         rate_control_deinitialize(local);
1301         debugfs_hw_del(local);
1302
1303         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1304                 kfree(local->supp_rates[i]);
1305                 kfree(local->basic_rates[i]);
1306         }
1307
1308         if (skb_queue_len(&local->skb_queue)
1309                         || skb_queue_len(&local->skb_queue_unreliable))
1310                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1311                        wiphy_name(local->hw.wiphy));
1312         skb_queue_purge(&local->skb_queue);
1313         skb_queue_purge(&local->skb_queue_unreliable);
1314
1315         destroy_workqueue(local->hw.workqueue);
1316         wiphy_unregister(local->hw.wiphy);
1317         ieee80211_wep_free(local);
1318         ieee80211_led_exit(local);
1319 }
1320 EXPORT_SYMBOL(ieee80211_unregister_hw);
1321
1322 void ieee80211_free_hw(struct ieee80211_hw *hw)
1323 {
1324         struct ieee80211_local *local = hw_to_local(hw);
1325
1326         ieee80211_if_free(local->mdev);
1327         wiphy_free(local->hw.wiphy);
1328 }
1329 EXPORT_SYMBOL(ieee80211_free_hw);
1330
1331 static int __init ieee80211_init(void)
1332 {
1333         struct sk_buff *skb;
1334         int ret;
1335
1336         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1337
1338         ret = rc80211_simple_init();
1339         if (ret)
1340                 goto fail;
1341
1342         ret = rc80211_pid_init();
1343         if (ret)
1344                 goto fail_simple;
1345
1346         ret = ieee80211_wme_register();
1347         if (ret) {
1348                 printk(KERN_DEBUG "ieee80211_init: failed to "
1349                        "initialize WME (err=%d)\n", ret);
1350                 goto fail_pid;
1351         }
1352
1353         ieee80211_debugfs_netdev_init();
1354         ieee80211_regdomain_init();
1355
1356         return 0;
1357
1358  fail_pid:
1359         rc80211_simple_exit();
1360  fail_simple:
1361         rc80211_pid_exit();
1362  fail:
1363         return ret;
1364 }
1365
1366 static void __exit ieee80211_exit(void)
1367 {
1368         rc80211_simple_exit();
1369         rc80211_pid_exit();
1370
1371         ieee80211_wme_unregister();
1372         ieee80211_debugfs_netdev_exit();
1373 }
1374
1375
1376 subsys_initcall(ieee80211_init);
1377 module_exit(ieee80211_exit);
1378
1379 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1380 MODULE_LICENSE("GPL");