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         bool need_hw_reconfig = 0;
 169
 170         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 171
 172         /* we hold the RTNL here so can safely walk the list */
 173         list_for_each_entry(nsdata, &local->interfaces, list) {
 174                 struct net_device *ndev = nsdata->dev;
 175
 176                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 177                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
 178                         /*
 179                          * check whether it may have the same address
 180                          */
 181                         if (!identical_mac_addr_allowed(sdata->vif.type,
 182                                                         nsdata->vif.type))
 183                                 return -ENOTUNIQ;
 184
 185                         /*
 186                          * can only add VLANs to enabled APs
 187                          */
 188                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 189                             nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
 190                             netif_running(nsdata->dev))
 191                                 sdata->u.vlan.ap = nsdata;
 192                 }
 193         }
 194
 195         switch (sdata->vif.type) {
 196         case IEEE80211_IF_TYPE_WDS:
 197                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
 198                         return -ENOLINK;
 199                 break;
 200         case IEEE80211_IF_TYPE_VLAN:
 201                 if (!sdata->u.vlan.ap)
 202                         return -ENOLINK;
 203                 break;
 204         case IEEE80211_IF_TYPE_AP:
 205         case IEEE80211_IF_TYPE_STA:
 206         case IEEE80211_IF_TYPE_MNTR:
 207         case IEEE80211_IF_TYPE_IBSS:
 208                 /* no special treatment */
 209                 break;
 210         case IEEE80211_IF_TYPE_INVALID:
 211                 /* cannot happen */
 212                 WARN_ON(1);
 213                 break;
 214         }
 215
 216         if (local->open_count == 0) {
 217                 res = 0;
 218                 if (local->ops->start)
 219                         res = local->ops->start(local_to_hw(local));
 220                 if (res)
 221                         return res;
 222                 need_hw_reconfig = 1;
 223                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 224         }
 225
 226         switch (sdata->vif.type) {
 227         case IEEE80211_IF_TYPE_VLAN:
 228                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 229                 /* no need to tell driver */
 230                 break;
 231         case IEEE80211_IF_TYPE_MNTR:
 232                 /* must be before the call to ieee80211_configure_filter */
 233                 local->monitors++;
 234                 if (local->monitors == 1) {
 235                         netif_tx_lock_bh(local->mdev);
 236                         ieee80211_configure_filter(local);
 237                         netif_tx_unlock_bh(local->mdev);
 238
 239                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 240                 }
 241                 break;
 242         case IEEE80211_IF_TYPE_STA:
 243         case IEEE80211_IF_TYPE_IBSS:
 244                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 245                 /* fall through */
 246         default:
 247                 conf.vif = &sdata->vif;
 248                 conf.type = sdata->vif.type;
 249                 conf.mac_addr = dev->dev_addr;
 250                 res = local->ops->add_interface(local_to_hw(local), &conf);
 251                 if (res && !local->open_count && local->ops->stop)
 252                         local->ops->stop(local_to_hw(local));
 253                 if (res)
 254                         return res;
 255
 256                 ieee80211_if_config(dev);
 257                 ieee80211_reset_erp_info(dev);
 258                 ieee80211_enable_keys(sdata);
 259
 260                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 261                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 262                         netif_carrier_off(dev);
 263                 else
 264                         netif_carrier_on(dev);
 265         }
 266
 267         if (local->open_count == 0) {
 268                 res = dev_open(local->mdev);
 269                 WARN_ON(res);
 270                 tasklet_enable(&local->tx_pending_tasklet);
 271                 tasklet_enable(&local->tasklet);
 272         }
 273
 274         /*
 275          * set_multicast_list will be invoked by the networking core
 276          * which will check whether any increments here were done in
 277          * error and sync them down to the hardware as filter flags.
 278          */
 279         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 280                 atomic_inc(&local->iff_allmultis);
 281
 282         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 283                 atomic_inc(&local->iff_promiscs);
 284
 285         local->open_count++;
 286         if (need_hw_reconfig)
 287                 ieee80211_hw_config(local);
 288
 289         netif_start_queue(dev);
 290
 291         return 0;
 292 }
 293
 294 static int ieee80211_stop(struct net_device *dev)
 295 {
 296         struct ieee80211_sub_if_data *sdata;
 297         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 298         struct ieee80211_if_init_conf conf;
 299         struct sta_info *sta;
 300         int i;
 301
 302         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 303
 304         list_for_each_entry(sta, &local->sta_list, list) {
 305                 if (sta->dev == dev)
 306                         for (i = 0; i <  STA_TID_NUM; i++)
 307                                 ieee80211_sta_stop_rx_ba_session(sta->dev,
 308                                                 sta->addr, i,
 309                                                 WLAN_BACK_RECIPIENT,
 310                                                 WLAN_REASON_QSTA_LEAVE_QBSS);
 311         }
 312
 313         netif_stop_queue(dev);
 314
 315         /*
 316          * Don't count this interface for promisc/allmulti while it
 317          * is down. dev_mc_unsync() will invoke set_multicast_list
 318          * on the master interface which will sync these down to the
 319          * hardware as filter flags.
 320          */
 321         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 322                 atomic_dec(&local->iff_allmultis);
 323
 324         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 325                 atomic_dec(&local->iff_promiscs);
 326
 327         dev_mc_unsync(local->mdev, dev);
 328
 329         /* APs need special treatment */
 330         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 331                 struct ieee80211_sub_if_data *vlan, *tmp;
 332                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 333
 334                 /* remove beacon */
 335                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 336                 synchronize_rcu();
 337                 kfree(old_beacon);
 338
 339                 /* down all dependent devices, that is VLANs */
 340                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 341                                          u.vlan.list)
 342                         dev_close(vlan->dev);
 343                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 344         }
 345
 346         local->open_count--;
 347
 348         switch (sdata->vif.type) {
 349         case IEEE80211_IF_TYPE_VLAN:
 350                 list_del(&sdata->u.vlan.list);
 351                 sdata->u.vlan.ap = NULL;
 352                 /* no need to tell driver */
 353                 break;
 354         case IEEE80211_IF_TYPE_MNTR:
 355                 local->monitors--;
 356                 if (local->monitors == 0) {
 357                         netif_tx_lock_bh(local->mdev);
 358                         ieee80211_configure_filter(local);
 359                         netif_tx_unlock_bh(local->mdev);
 360
 361                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 362                 }
 363                 break;
 364         case IEEE80211_IF_TYPE_STA:
 365         case IEEE80211_IF_TYPE_IBSS:
 366                 sdata->u.sta.state = IEEE80211_DISABLED;
 367                 del_timer_sync(&sdata->u.sta.timer);
 368                 /*
 369                  * When we get here, the interface is marked down.
 370                  * Call synchronize_rcu() to wait for the RX path
 371                  * should it be using the interface and enqueuing
 372                  * frames at this very time on another CPU.
 373                  */
 374                 synchronize_rcu();
 375                 skb_queue_purge(&sdata->u.sta.skb_queue);
 376
 377                 if (local->scan_dev == sdata->dev) {
 378                         if (!local->ops->hw_scan) {
 379                                 local->sta_sw_scanning = 0;
 380                                 cancel_delayed_work(&local->scan_work);
 381                         } else
 382                                 local->sta_hw_scanning = 0;
 383                 }
 384
 385                 flush_workqueue(local->hw.workqueue);
 386
 387                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 388                 kfree(sdata->u.sta.extra_ie);
 389                 sdata->u.sta.extra_ie = NULL;
 390                 sdata->u.sta.extra_ie_len = 0;
 391                 /* fall through */
 392         default:
 393                 conf.vif = &sdata->vif;
 394                 conf.type = sdata->vif.type;
 395                 conf.mac_addr = dev->dev_addr;
 396                 /* disable all keys for as long as this netdev is down */
 397                 ieee80211_disable_keys(sdata);
 398                 local->ops->remove_interface(local_to_hw(local), &conf);
 399         }
 400
 401         if (local->open_count == 0) {
 402                 if (netif_running(local->mdev))
 403                         dev_close(local->mdev);
 404
 405                 if (local->ops->stop)
 406                         local->ops->stop(local_to_hw(local));
 407
 408                 ieee80211_led_radio(local, 0);
 409
 410                 tasklet_disable(&local->tx_pending_tasklet);
 411                 tasklet_disable(&local->tasklet);
 412         }
 413
 414         return 0;
 415 }
 416
 417 static void ieee80211_set_multicast_list(struct net_device *dev)
 418 {
 419         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 421         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 422
 423         allmulti = !!(dev->flags & IFF_ALLMULTI);
 424         promisc = !!(dev->flags & IFF_PROMISC);
 425         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 426         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 427
 428         if (allmulti != sdata_allmulti) {
 429                 if (dev->flags & IFF_ALLMULTI)
 430                         atomic_inc(&local->iff_allmultis);
 431                 else
 432                         atomic_dec(&local->iff_allmultis);
 433                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 434         }
 435
 436         if (promisc != sdata_promisc) {
 437                 if (dev->flags & IFF_PROMISC)
 438                         atomic_inc(&local->iff_promiscs);
 439                 else
 440                         atomic_dec(&local->iff_promiscs);
 441                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 442         }
 443
 444         dev_mc_sync(local->mdev, dev);
 445 }
 446
 447 static const struct header_ops ieee80211_header_ops = {
 448         .create         = eth_header,
 449         .parse          = header_parse_80211,
 450         .rebuild        = eth_rebuild_header,
 451         .cache          = eth_header_cache,
 452         .cache_update   = eth_header_cache_update,
 453 };
 454
 455 /* Must not be called for mdev */
 456 void ieee80211_if_setup(struct net_device *dev)
 457 {
 458         ether_setup(dev);
 459         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 460         dev->wireless_handlers = &ieee80211_iw_handler_def;
 461         dev->set_multicast_list = ieee80211_set_multicast_list;
 462         dev->change_mtu = ieee80211_change_mtu;
 463         dev->open = ieee80211_open;
 464         dev->stop = ieee80211_stop;
 465         dev->destructor = ieee80211_if_free;
 466 }
 467
 468 /* WDS specialties */
 469
 470 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 471 {
 472         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 473         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 474         struct sta_info *sta;
 475         DECLARE_MAC_BUF(mac);
 476
 477         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 478                 return 0;
 479
 480         /* Create STA entry for the new peer */
 481         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 482         if (!sta)
 483                 return -ENOMEM;
 484         sta_info_put(sta);
 485
 486         /* Remove STA entry for the old peer */
 487         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 488         if (sta) {
 489                 sta_info_free(sta);
 490                 sta_info_put(sta);
 491         } else {
 492                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 493                        "peer %s\n",
 494                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 495         }
 496
 497         /* Update WDS link data */
 498         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 499
 500         return 0;
 501 }
 502
 503 /* everything else */
 504
 505 static int __ieee80211_if_config(struct net_device *dev,
 506                                  struct sk_buff *beacon,
 507                                  struct ieee80211_tx_control *control)
 508 {
 509         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 510         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 511         struct ieee80211_if_conf conf;
 512
 513         if (!local->ops->config_interface || !netif_running(dev))
 514                 return 0;
 515
 516         memset(&conf, 0, sizeof(conf));
 517         conf.type = sdata->vif.type;
 518         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 519             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 520                 conf.bssid = sdata->u.sta.bssid;
 521                 conf.ssid = sdata->u.sta.ssid;
 522                 conf.ssid_len = sdata->u.sta.ssid_len;
 523         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 524                 conf.ssid = sdata->u.ap.ssid;
 525                 conf.ssid_len = sdata->u.ap.ssid_len;
 526                 conf.beacon = beacon;
 527                 conf.beacon_control = control;
 528         }
 529         return local->ops->config_interface(local_to_hw(local),
 530                                             &sdata->vif, &conf);
 531 }
 532
 533 int ieee80211_if_config(struct net_device *dev)
 534 {
 535         return __ieee80211_if_config(dev, NULL, NULL);
 536 }
 537
 538 int ieee80211_if_config_beacon(struct net_device *dev)
 539 {
 540         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 541         struct ieee80211_tx_control control;
 542         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 543         struct sk_buff *skb;
 544
 545         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 546                 return 0;
 547         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
 548                                    &control);
 549         if (!skb)
 550                 return -ENOMEM;
 551         return __ieee80211_if_config(dev, skb, &control);
 552 }
 553
 554 int ieee80211_hw_config(struct ieee80211_local *local)
 555 {
 556         struct ieee80211_hw_mode *mode;
 557         struct ieee80211_channel *chan;
 558         int ret = 0;
 559
 560         if (local->sta_sw_scanning) {
 561                 chan = local->scan_channel;
 562                 mode = local->scan_hw_mode;
 563         } else {
 564                 chan = local->oper_channel;
 565                 mode = local->oper_hw_mode;
 566         }
 567
 568         local->hw.conf.channel = chan->chan;
 569         local->hw.conf.channel_val = chan->val;
 570         if (!local->hw.conf.power_level) {
 571                 local->hw.conf.power_level = chan->power_level;
 572         } else {
 573                 local->hw.conf.power_level = min(chan->power_level,
 574                                                  local->hw.conf.power_level);
 575         }
 576         local->hw.conf.freq = chan->freq;
 577         local->hw.conf.phymode = mode->mode;
 578         local->hw.conf.antenna_max = chan->antenna_max;
 579         local->hw.conf.chan = chan;
 580         local->hw.conf.mode = mode;
 581
 582 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 583         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 584                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 585                local->hw.conf.phymode);
 586 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 587
 588         if (local->open_count)
 589                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 590
 591         return ret;
 592 }
 593
 594 /**
 595  * ieee80211_hw_config_ht should be used only after legacy configuration
 596  * has been determined, as ht configuration depends upon the hardware's
 597  * HT abilities for a _specific_ band.
 598  */
 599 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 600                            struct ieee80211_ht_info *req_ht_cap,
 601                            struct ieee80211_ht_bss_info *req_bss_cap)
 602 {
 603         struct ieee80211_conf *conf = &local->hw.conf;
 604         struct ieee80211_hw_mode *mode = conf->mode;
 605         int i;
 606
 607         /* HT is not supported */
 608         if (!mode->ht_info.ht_supported) {
 609                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 610                 return -EOPNOTSUPP;
 611         }
 612
 613         /* disable HT */
 614         if (!enable_ht) {
 615                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 616         } else {
 617                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
 618                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
 619                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
 620                 conf->ht_conf.cap |=
 621                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
 622                 conf->ht_bss_conf.primary_channel =
 623                         req_bss_cap->primary_channel;
 624                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
 625                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
 626                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
 627                         conf->ht_conf.supp_mcs_set[i] =
 628                                 mode->ht_info.supp_mcs_set[i] &
 629                                   req_ht_cap->supp_mcs_set[i];
 630
 631                 /* In STA mode, this gives us indication
 632                  * to the AP's mode of operation */
 633                 conf->ht_conf.ht_supported = 1;
 634                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
 635                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
 636         }
 637
 638         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
 639
 640         return 0;
 641 }
 642
 643 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 644                                       u32 changed)
 645 {
 646         struct ieee80211_local *local = sdata->local;
 647
 648         if (!changed)
 649                 return;
 650
 651         if (local->ops->bss_info_changed)
 652                 local->ops->bss_info_changed(local_to_hw(local),
 653                                              &sdata->vif,
 654                                              &sdata->bss_conf,
 655                                              changed);
 656 }
 657
 658 void ieee80211_reset_erp_info(struct net_device *dev)
 659 {
 660         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 661
 662         sdata->bss_conf.use_cts_prot = 0;
 663         sdata->bss_conf.use_short_preamble = 0;
 664         ieee80211_bss_info_change_notify(sdata,
 665                                          BSS_CHANGED_ERP_CTS_PROT |
 666                                          BSS_CHANGED_ERP_PREAMBLE);
 667 }
 668
 669 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 670                                  struct sk_buff *skb,
 671                                  struct ieee80211_tx_status *status)
 672 {
 673         struct ieee80211_local *local = hw_to_local(hw);
 674         struct ieee80211_tx_status *saved;
 675         int tmp;
 676
 677         skb->dev = local->mdev;
 678         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 679         if (unlikely(!saved)) {
 680                 if (net_ratelimit())
 681                         printk(KERN_WARNING "%s: Not enough memory, "
 682                                "dropping tx status", skb->dev->name);
 683                 /* should be dev_kfree_skb_irq, but due to this function being
 684                  * named _irqsafe instead of just _irq we can't be sure that
 685                  * people won't call it from non-irq contexts */
 686                 dev_kfree_skb_any(skb);
 687                 return;
 688         }
 689         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 690         /* copy pointer to saved status into skb->cb for use by tasklet */
 691         memcpy(skb->cb, &saved, sizeof(saved));
 692
 693         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 694         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 695                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 696         tmp = skb_queue_len(&local->skb_queue) +
 697                 skb_queue_len(&local->skb_queue_unreliable);
 698         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 699                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 700                 memcpy(&saved, skb->cb, sizeof(saved));
 701                 kfree(saved);
 702                 dev_kfree_skb_irq(skb);
 703                 tmp--;
 704                 I802_DEBUG_INC(local->tx_status_drop);
 705         }
 706         tasklet_schedule(&local->tasklet);
 707 }
 708 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 709
 710 static void ieee80211_tasklet_handler(unsigned long data)
 711 {
 712         struct ieee80211_local *local = (struct ieee80211_local *) data;
 713         struct sk_buff *skb;
 714         struct ieee80211_rx_status rx_status;
 715         struct ieee80211_tx_status *tx_status;
 716
 717         while ((skb = skb_dequeue(&local->skb_queue)) ||
 718                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 719                 switch (skb->pkt_type) {
 720                 case IEEE80211_RX_MSG:
 721                         /* status is in skb->cb */
 722                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 723                         /* Clear skb->pkt_type in order to not confuse kernel
 724                          * netstack. */
 725                         skb->pkt_type = 0;
 726                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 727                         break;
 728                 case IEEE80211_TX_STATUS_MSG:
 729                         /* get pointer to saved status out of skb->cb */
 730                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 731                         skb->pkt_type = 0;
 732                         ieee80211_tx_status(local_to_hw(local),
 733                                             skb, tx_status);
 734                         kfree(tx_status);
 735                         break;
 736                 default: /* should never get here! */
 737                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 738                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 739                         dev_kfree_skb(skb);
 740                         break;
 741                 }
 742         }
 743 }
 744
 745 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 746  * make a prepared TX frame (one that has been given to hw) to look like brand
 747  * new IEEE 802.11 frame that is ready to go through TX processing again.
 748  * Also, tx_packet_data in cb is restored from tx_control. */
 749 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 750                                       struct ieee80211_key *key,
 751                                       struct sk_buff *skb,
 752                                       struct ieee80211_tx_control *control)
 753 {
 754         int hdrlen, iv_len, mic_len;
 755         struct ieee80211_tx_packet_data *pkt_data;
 756
 757         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 758         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
 759         pkt_data->flags = 0;
 760         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 761                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 762         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 763                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 764         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 765                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 766         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 767                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 768         pkt_data->queue = control->queue;
 769
 770         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 771
 772         if (!key)
 773                 goto no_key;
 774
 775         switch (key->conf.alg) {
 776         case ALG_WEP:
 777                 iv_len = WEP_IV_LEN;
 778                 mic_len = WEP_ICV_LEN;
 779                 break;
 780         case ALG_TKIP:
 781                 iv_len = TKIP_IV_LEN;
 782                 mic_len = TKIP_ICV_LEN;
 783                 break;
 784         case ALG_CCMP:
 785                 iv_len = CCMP_HDR_LEN;
 786                 mic_len = CCMP_MIC_LEN;
 787                 break;
 788         default:
 789                 goto no_key;
 790         }
 791
 792         if (skb->len >= mic_len &&
 793             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 794                 skb_trim(skb, skb->len - mic_len);
 795         if (skb->len >= iv_len && skb->len > hdrlen) {
 796                 memmove(skb->data + iv_len, skb->data, hdrlen);
 797                 skb_pull(skb, iv_len);
 798         }
 799
 800 no_key:
 801         {
 802                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 803                 u16 fc = le16_to_cpu(hdr->frame_control);
 804                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 805                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 806                         hdr->frame_control = cpu_to_le16(fc);
 807                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 808                         skb_pull(skb, 2);
 809                 }
 810         }
 811 }
 812
 813 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 814                          struct ieee80211_tx_status *status)
 815 {
 816         struct sk_buff *skb2;
 817         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 818         struct ieee80211_local *local = hw_to_local(hw);
 819         u16 frag, type;
 820         struct ieee80211_tx_status_rtap_hdr *rthdr;
 821         struct ieee80211_sub_if_data *sdata;
 822         int monitors;
 823
 824         if (!status) {
 825                 printk(KERN_ERR
 826                        "%s: ieee80211_tx_status called with NULL status\n",
 827                        wiphy_name(local->hw.wiphy));
 828                 dev_kfree_skb(skb);
 829                 return;
 830         }
 831
 832         if (status->excessive_retries) {
 833                 struct sta_info *sta;
 834                 sta = sta_info_get(local, hdr->addr1);
 835                 if (sta) {
 836                         if (sta->flags & WLAN_STA_PS) {
 837                                 /* The STA is in power save mode, so assume
 838                                  * that this TX packet failed because of that.
 839                                  */
 840                                 status->excessive_retries = 0;
 841                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 842                         }
 843                         sta_info_put(sta);
 844                 }
 845         }
 846
 847         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 848                 struct sta_info *sta;
 849                 sta = sta_info_get(local, hdr->addr1);
 850                 if (sta) {
 851                         sta->tx_filtered_count++;
 852
 853                         /* Clear the TX filter mask for this STA when sending
 854                          * the next packet. If the STA went to power save mode,
 855                          * this will happen when it is waking up for the next
 856                          * time. */
 857                         sta->clear_dst_mask = 1;
 858
 859                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 860                          * the race between RX and TX status causing some
 861                          * packets to be filtered out before 80211.o gets an
 862                          * update for PS status? This seems to be the case, so
 863                          * no changes are likely to be needed. */
 864                         if (sta->flags & WLAN_STA_PS &&
 865                             skb_queue_len(&sta->tx_filtered) <
 866                             STA_MAX_TX_BUFFER) {
 867                                 ieee80211_remove_tx_extra(local, sta->key,
 868                                                           skb,
 869                                                           &status->control);
 870                                 skb_queue_tail(&sta->tx_filtered, skb);
 871                         } else if (!(sta->flags & WLAN_STA_PS) &&
 872                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 873                                 /* Software retry the packet once */
 874                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 875                                 ieee80211_remove_tx_extra(local, sta->key,
 876                                                           skb,
 877                                                           &status->control);
 878                                 dev_queue_xmit(skb);
 879                         } else {
 880                                 if (net_ratelimit()) {
 881                                         printk(KERN_DEBUG "%s: dropped TX "
 882                                                "filtered frame queue_len=%d "
 883                                                "PS=%d @%lu\n",
 884                                                wiphy_name(local->hw.wiphy),
 885                                                skb_queue_len(
 886                                                        &sta->tx_filtered),
 887                                                !!(sta->flags & WLAN_STA_PS),
 888                                                jiffies);
 889                                 }
 890                                 dev_kfree_skb(skb);
 891                         }
 892                         sta_info_put(sta);
 893                         return;
 894                 }
 895         } else
 896                 rate_control_tx_status(local->mdev, skb, status);
 897
 898         ieee80211_led_tx(local, 0);
 899
 900         /* SNMP counters
 901          * Fragments are passed to low-level drivers as separate skbs, so these
 902          * are actually fragments, not frames. Update frame counters only for
 903          * the first fragment of the frame. */
 904
 905         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 906         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 907
 908         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 909                 if (frag == 0) {
 910                         local->dot11TransmittedFrameCount++;
 911                         if (is_multicast_ether_addr(hdr->addr1))
 912                                 local->dot11MulticastTransmittedFrameCount++;
 913                         if (status->retry_count > 0)
 914                                 local->dot11RetryCount++;
 915                         if (status->retry_count > 1)
 916                                 local->dot11MultipleRetryCount++;
 917                 }
 918
 919                 /* This counter shall be incremented for an acknowledged MPDU
 920                  * with an individual address in the address 1 field or an MPDU
 921                  * with a multicast address in the address 1 field of type Data
 922                  * or Management. */
 923                 if (!is_multicast_ether_addr(hdr->addr1) ||
 924                     type == IEEE80211_FTYPE_DATA ||
 925                     type == IEEE80211_FTYPE_MGMT)
 926                         local->dot11TransmittedFragmentCount++;
 927         } else {
 928                 if (frag == 0)
 929                         local->dot11FailedCount++;
 930         }
 931
 932         /* this was a transmitted frame, but now we want to reuse it */
 933         skb_orphan(skb);
 934
 935         if (!local->monitors) {
 936                 dev_kfree_skb(skb);
 937                 return;
 938         }
 939
 940         /* send frame to monitor interfaces now */
 941
 942         if (skb_headroom(skb) < sizeof(*rthdr)) {
 943                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 944                 dev_kfree_skb(skb);
 945                 return;
 946         }
 947
 948         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 949                                 skb_push(skb, sizeof(*rthdr));
 950
 951         memset(rthdr, 0, sizeof(*rthdr));
 952         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 953         rthdr->hdr.it_present =
 954                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 955                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 956
 957         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 958             !is_multicast_ether_addr(hdr->addr1))
 959                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 960
 961         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 962             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 963                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 964         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 965                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 966
 967         rthdr->data_retries = status->retry_count;
 968
 969         rcu_read_lock();
 970         monitors = local->monitors;
 971         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 972                 /*
 973                  * Using the monitors counter is possibly racy, but
 974                  * if the value is wrong we simply either clone the skb
 975                  * once too much or forget sending it to one monitor iface
 976                  * The latter case isn't nice but fixing the race is much
 977                  * more complicated.
 978                  */
 979                 if (!monitors || !skb)
 980                         goto out;
 981
 982                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
 983                         if (!netif_running(sdata->dev))
 984                                 continue;
 985                         monitors--;
 986                         if (monitors)
 987                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 988                         else
 989                                 skb2 = NULL;
 990                         skb->dev = sdata->dev;
 991                         /* XXX: is this sufficient for BPF? */
 992                         skb_set_mac_header(skb, 0);
 993                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 994                         skb->pkt_type = PACKET_OTHERHOST;
 995                         skb->protocol = htons(ETH_P_802_2);
 996                         memset(skb->cb, 0, sizeof(skb->cb));
 997                         netif_rx(skb);
 998                         skb = skb2;
 999                 }
1000         }
1001  out:
1002         rcu_read_unlock();
1003         if (skb)
1004                 dev_kfree_skb(skb);
1005 }
1006 EXPORT_SYMBOL(ieee80211_tx_status);
1007
1008 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1009                                         const struct ieee80211_ops *ops)
1010 {
1011         struct net_device *mdev;
1012         struct ieee80211_local *local;
1013         struct ieee80211_sub_if_data *sdata;
1014         int priv_size;
1015         struct wiphy *wiphy;
1016
1017         /* Ensure 32-byte alignment of our private data and hw private data.
1018          * We use the wiphy priv data for both our ieee80211_local and for
1019          * the driver's private data
1020          *
1021          * In memory it'll be like this:
1022          *
1023          * +-------------------------+
1024          * | struct wiphy           |
1025          * +-------------------------+
1026          * | struct ieee80211_local  |
1027          * +-------------------------+
1028          * | driver's private data   |
1029          * +-------------------------+
1030          *
1031          */
1032         priv_size = ((sizeof(struct ieee80211_local) +
1033                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1034                     priv_data_len;
1035
1036         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1037
1038         if (!wiphy)
1039                 return NULL;
1040
1041         wiphy->privid = mac80211_wiphy_privid;
1042
1043         local = wiphy_priv(wiphy);
1044         local->hw.wiphy = wiphy;
1045
1046         local->hw.priv = (char *)local +
1047                          ((sizeof(struct ieee80211_local) +
1048                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1049
1050         BUG_ON(!ops->tx);
1051         BUG_ON(!ops->start);
1052         BUG_ON(!ops->stop);
1053         BUG_ON(!ops->config);
1054         BUG_ON(!ops->add_interface);
1055         BUG_ON(!ops->remove_interface);
1056         BUG_ON(!ops->configure_filter);
1057         local->ops = ops;
1058
1059         /* for now, mdev needs sub_if_data :/ */
1060         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1061                             "wmaster%d", ether_setup);
1062         if (!mdev) {
1063                 wiphy_free(wiphy);
1064                 return NULL;
1065         }
1066
1067         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1068         mdev->ieee80211_ptr = &sdata->wdev;
1069         sdata->wdev.wiphy = wiphy;
1070
1071         local->hw.queues = 1; /* default */
1072
1073         local->mdev = mdev;
1074         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1075         local->rx_handlers = ieee80211_rx_handlers;
1076         local->tx_handlers = ieee80211_tx_handlers;
1077
1078         local->bridge_packets = 1;
1079
1080         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1081         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1082         local->short_retry_limit = 7;
1083         local->long_retry_limit = 4;
1084         local->hw.conf.radio_enabled = 1;
1085
1086         local->enabled_modes = ~0;
1087
1088         INIT_LIST_HEAD(&local->modes_list);
1089
1090         INIT_LIST_HEAD(&local->interfaces);
1091
1092         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1093         ieee80211_rx_bss_list_init(mdev);
1094
1095         sta_info_init(local);
1096
1097         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1098         mdev->open = ieee80211_master_open;
1099         mdev->stop = ieee80211_master_stop;
1100         mdev->type = ARPHRD_IEEE80211;
1101         mdev->header_ops = &ieee80211_header_ops;
1102         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1103
1104         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1105         sdata->dev = mdev;
1106         sdata->local = local;
1107         sdata->u.ap.force_unicast_rateidx = -1;
1108         sdata->u.ap.max_ratectrl_rateidx = -1;
1109         ieee80211_if_sdata_init(sdata);
1110         /* no RCU needed since we're still during init phase */
1111         list_add_tail(&sdata->list, &local->interfaces);
1112
1113         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1114                      (unsigned long)local);
1115         tasklet_disable(&local->tx_pending_tasklet);
1116
1117         tasklet_init(&local->tasklet,
1118                      ieee80211_tasklet_handler,
1119                      (unsigned long) local);
1120         tasklet_disable(&local->tasklet);
1121
1122         skb_queue_head_init(&local->skb_queue);
1123         skb_queue_head_init(&local->skb_queue_unreliable);
1124
1125         return local_to_hw(local);
1126 }
1127 EXPORT_SYMBOL(ieee80211_alloc_hw);
1128
1129 int ieee80211_register_hw(struct ieee80211_hw *hw)
1130 {
1131         struct ieee80211_local *local = hw_to_local(hw);
1132         const char *name;
1133         int result;
1134
1135         result = wiphy_register(local->hw.wiphy);
1136         if (result < 0)
1137                 return result;
1138
1139         name = wiphy_dev(local->hw.wiphy)->driver->name;
1140         local->hw.workqueue = create_singlethread_workqueue(name);
1141         if (!local->hw.workqueue) {
1142                 result = -ENOMEM;
1143                 goto fail_workqueue;
1144         }
1145
1146         /*
1147          * The hardware needs headroom for sending the frame,
1148          * and we need some headroom for passing the frame to monitor
1149          * interfaces, but never both at the same time.
1150          */
1151         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1152                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1153
1154         debugfs_hw_add(local);
1155
1156         local->hw.conf.beacon_int = 1000;
1157
1158         local->wstats_flags |= local->hw.max_rssi ?
1159                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1160         local->wstats_flags |= local->hw.max_signal ?
1161                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1162         local->wstats_flags |= local->hw.max_noise ?
1163                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1164         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1165                 local->wstats_flags |= IW_QUAL_DBM;
1166
1167         result = sta_info_start(local);
1168         if (result < 0)
1169                 goto fail_sta_info;
1170
1171         rtnl_lock();
1172         result = dev_alloc_name(local->mdev, local->mdev->name);
1173         if (result < 0)
1174                 goto fail_dev;
1175
1176         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1177         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1178
1179         result = register_netdevice(local->mdev);
1180         if (result < 0)
1181                 goto fail_dev;
1182
1183         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1184         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1185
1186         result = ieee80211_init_rate_ctrl_alg(local,
1187                                               hw->rate_control_algorithm);
1188         if (result < 0) {
1189                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1190                        "algorithm\n", wiphy_name(local->hw.wiphy));
1191                 goto fail_rate;
1192         }
1193
1194         result = ieee80211_wep_init(local);
1195
1196         if (result < 0) {
1197                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1198                        wiphy_name(local->hw.wiphy));
1199                 goto fail_wep;
1200         }
1201
1202         ieee80211_install_qdisc(local->mdev);
1203
1204         /* add one default STA interface */
1205         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1206                                   IEEE80211_IF_TYPE_STA);
1207         if (result)
1208                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1209                        wiphy_name(local->hw.wiphy));
1210
1211         local->reg_state = IEEE80211_DEV_REGISTERED;
1212         rtnl_unlock();
1213
1214         ieee80211_led_init(local);
1215
1216         return 0;
1217
1218 fail_wep:
1219         rate_control_deinitialize(local);
1220 fail_rate:
1221         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1222         unregister_netdevice(local->mdev);
1223 fail_dev:
1224         rtnl_unlock();
1225         sta_info_stop(local);
1226 fail_sta_info:
1227         debugfs_hw_del(local);
1228         destroy_workqueue(local->hw.workqueue);
1229 fail_workqueue:
1230         wiphy_unregister(local->hw.wiphy);
1231         return result;
1232 }
1233 EXPORT_SYMBOL(ieee80211_register_hw);
1234
1235 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1236                               struct ieee80211_hw_mode *mode)
1237 {
1238         struct ieee80211_local *local = hw_to_local(hw);
1239         struct ieee80211_rate *rate;
1240         int i;
1241
1242         INIT_LIST_HEAD(&mode->list);
1243         list_add_tail(&mode->list, &local->modes_list);
1244
1245         local->hw_modes |= (1 << mode->mode);
1246         for (i = 0; i < mode->num_rates; i++) {
1247                 rate = &(mode->rates[i]);
1248                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1249         }
1250         ieee80211_prepare_rates(local, mode);
1251
1252         if (!local->oper_hw_mode) {
1253                 /* Default to this mode */
1254                 local->hw.conf.phymode = mode->mode;
1255                 local->oper_hw_mode = local->scan_hw_mode = mode;
1256                 local->oper_channel = local->scan_channel = &mode->channels[0];
1257                 local->hw.conf.mode = local->oper_hw_mode;
1258                 local->hw.conf.chan = local->oper_channel;
1259         }
1260
1261         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1262                 ieee80211_set_default_regdomain(mode);
1263
1264         return 0;
1265 }
1266 EXPORT_SYMBOL(ieee80211_register_hwmode);
1267
1268 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1269 {
1270         struct ieee80211_local *local = hw_to_local(hw);
1271         struct ieee80211_sub_if_data *sdata, *tmp;
1272         int i;
1273
1274         tasklet_kill(&local->tx_pending_tasklet);
1275         tasklet_kill(&local->tasklet);
1276
1277         rtnl_lock();
1278
1279         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1280
1281         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1282
1283         /*
1284          * At this point, interface list manipulations are fine
1285          * because the driver cannot be handing us frames any
1286          * more and the tasklet is killed.
1287          */
1288
1289         /*
1290          * First, we remove all non-master interfaces. Do this because they
1291          * may have bss pointer dependency on the master, and when we free
1292          * the master these would be freed as well, breaking our list
1293          * iteration completely.
1294          */
1295         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1296                 if (sdata->dev == local->mdev)
1297                         continue;
1298                 list_del(&sdata->list);
1299                 __ieee80211_if_del(local, sdata);
1300         }
1301
1302         /* then, finally, remove the master interface */
1303         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1304
1305         rtnl_unlock();
1306
1307         ieee80211_rx_bss_list_deinit(local->mdev);
1308         ieee80211_clear_tx_pending(local);
1309         sta_info_stop(local);
1310         rate_control_deinitialize(local);
1311         debugfs_hw_del(local);
1312
1313         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1314                 kfree(local->supp_rates[i]);
1315                 kfree(local->basic_rates[i]);
1316         }
1317
1318         if (skb_queue_len(&local->skb_queue)
1319                         || skb_queue_len(&local->skb_queue_unreliable))
1320                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1321                        wiphy_name(local->hw.wiphy));
1322         skb_queue_purge(&local->skb_queue);
1323         skb_queue_purge(&local->skb_queue_unreliable);
1324
1325         destroy_workqueue(local->hw.workqueue);
1326         wiphy_unregister(local->hw.wiphy);
1327         ieee80211_wep_free(local);
1328         ieee80211_led_exit(local);
1329 }
1330 EXPORT_SYMBOL(ieee80211_unregister_hw);
1331
1332 void ieee80211_free_hw(struct ieee80211_hw *hw)
1333 {
1334         struct ieee80211_local *local = hw_to_local(hw);
1335
1336         ieee80211_if_free(local->mdev);
1337         wiphy_free(local->hw.wiphy);
1338 }
1339 EXPORT_SYMBOL(ieee80211_free_hw);
1340
1341 static int __init ieee80211_init(void)
1342 {
1343         struct sk_buff *skb;
1344         int ret;
1345
1346         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1347
1348         ret = rc80211_simple_init();
1349         if (ret)
1350                 goto out;
1351
1352         ret = rc80211_pid_init();
1353         if (ret)
1354                 goto out_cleanup_simple;
1355
1356         ret = ieee80211_wme_register();
1357         if (ret) {
1358                 printk(KERN_DEBUG "ieee80211_init: failed to "
1359                        "initialize WME (err=%d)\n", ret);
1360                 goto out_cleanup_pid;
1361         }
1362
1363         ieee80211_debugfs_netdev_init();
1364         ieee80211_regdomain_init();
1365
1366         return 0;
1367
1368  out_cleanup_pid:
1369         rc80211_pid_exit();
1370  out_cleanup_simple:
1371         rc80211_simple_exit();
1372  out:
1373         return ret;
1374 }
1375
1376 static void __exit ieee80211_exit(void)
1377 {
1378         rc80211_simple_exit();
1379         rc80211_pid_exit();
1380
1381         ieee80211_wme_unregister();
1382         ieee80211_debugfs_netdev_exit();
1383 }
1384
1385
1386 subsys_initcall(ieee80211_init);
1387 module_exit(ieee80211_exit);
1388
1389 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1390 MODULE_LICENSE("GPL");