net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_i.h"
  28 #include "ieee80211_rate.h"
  29 #include "wep.h"
  30 #include "wme.h"
  31 #include "aes_ccm.h"
  32 #include "ieee80211_led.h"
  33 #include "cfg.h"
  34 #include "debugfs.h"
  35 #include "debugfs_netdev.h"
  36
  37 #define SUPP_MCS_SET_LEN 16
  38
  39 /*
  40  * For seeing transmitted packets on monitor interfaces
  41  * we have a radiotap header too.
  42  */
  43 struct ieee80211_tx_status_rtap_hdr {
  44         struct ieee80211_radiotap_header hdr;
  45         __le16 tx_flags;
  46         u8 data_retries;
  47 } __attribute__ ((packed));
  48
  49 /* common interface routines */
  50
  51 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  52 {
  53         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  54         return ETH_ALEN;
  55 }
  56
  57 /* must be called under mdev tx lock */
  58 static void ieee80211_configure_filter(struct ieee80211_local *local)
  59 {
  60         unsigned int changed_flags;
  61         unsigned int new_flags = 0;
  62
  63         if (atomic_read(&local->iff_promiscs))
  64                 new_flags |= FIF_PROMISC_IN_BSS;
  65
  66         if (atomic_read(&local->iff_allmultis))
  67                 new_flags |= FIF_ALLMULTI;
  68
  69         if (local->monitors)
  70                 new_flags |= FIF_CONTROL |
  71                              FIF_OTHER_BSS |
  72                              FIF_BCN_PRBRESP_PROMISC;
  73
  74         changed_flags = local->filter_flags ^ new_flags;
  75
  76         /* be a bit nasty */
  77         new_flags |= (1<<31);
  78
  79         local->ops->configure_filter(local_to_hw(local),
  80                                      changed_flags, &new_flags,
  81                                      local->mdev->mc_count,
  82                                      local->mdev->mc_list);
  83
  84         WARN_ON(new_flags & (1<<31));
  85
  86         local->filter_flags = new_flags & ~(1<<31);
  87 }
  88
  89 /* master interface */
  90
  91 static int ieee80211_master_open(struct net_device *dev)
  92 {
  93         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  94         struct ieee80211_sub_if_data *sdata;
  95         int res = -EOPNOTSUPP;
  96
  97         /* we hold the RTNL here so can safely walk the list */
  98         list_for_each_entry(sdata, &local->interfaces, list) {
  99                 if (sdata->dev != dev && netif_running(sdata->dev)) {
 100                         res = 0;
 101                         break;
 102                 }
 103         }
 104         return res;
 105 }
 106
 107 static int ieee80211_master_stop(struct net_device *dev)
 108 {
 109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 110         struct ieee80211_sub_if_data *sdata;
 111
 112         /* we hold the RTNL here so can safely walk the list */
 113         list_for_each_entry(sdata, &local->interfaces, list)
 114                 if (sdata->dev != dev && netif_running(sdata->dev))
 115                         dev_close(sdata->dev);
 116
 117         return 0;
 118 }
 119
 120 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 121 {
 122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 123
 124         ieee80211_configure_filter(local);
 125 }
 126
 127 /* regular interfaces */
 128
 129 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 130 {
 131         /* FIX: what would be proper limits for MTU?
 132          * This interface uses 802.3 frames. */
 133         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 134                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 135                        dev->name, new_mtu);
 136                 return -EINVAL;
 137         }
 138
 139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 140         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 141 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 142         dev->mtu = new_mtu;
 143         return 0;
 144 }
 145
 146 static inline int identical_mac_addr_allowed(int type1, int type2)
 147 {
 148         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 149                 type2 == IEEE80211_IF_TYPE_MNTR ||
 150                 (type1 == IEEE80211_IF_TYPE_AP &&
 151                  type2 == IEEE80211_IF_TYPE_WDS) ||
 152                 (type1 == IEEE80211_IF_TYPE_WDS &&
 153                  (type2 == IEEE80211_IF_TYPE_WDS ||
 154                   type2 == IEEE80211_IF_TYPE_AP)) ||
 155                 (type1 == IEEE80211_IF_TYPE_AP &&
 156                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 157                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 158                  (type2 == IEEE80211_IF_TYPE_AP ||
 159                   type2 == IEEE80211_IF_TYPE_VLAN)));
 160 }
 161
 162 static int ieee80211_open(struct net_device *dev)
 163 {
 164         struct ieee80211_sub_if_data *sdata, *nsdata;
 165         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 166         struct ieee80211_if_init_conf conf;
 167         int res;
 168
 169         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 170
 171         /* we hold the RTNL here so can safely walk the list */
 172         list_for_each_entry(nsdata, &local->interfaces, list) {
 173                 struct net_device *ndev = nsdata->dev;
 174
 175                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 176                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
 177                         /*
 178                          * check whether it may have the same address
 179                          */
 180                         if (!identical_mac_addr_allowed(sdata->type,
 181                                                         nsdata->type))
 182                                 return -ENOTUNIQ;
 183
 184                         /*
 185                          * can only add VLANs to enabled APs
 186                          */
 187                         if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
 188                             nsdata->type == IEEE80211_IF_TYPE_AP &&
 189                             netif_running(nsdata->dev))
 190                                 sdata->u.vlan.ap = nsdata;
 191                 }
 192         }
 193
 194         switch (sdata->type) {
 195         case IEEE80211_IF_TYPE_WDS:
 196                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
 197                         return -ENOLINK;
 198                 break;
 199         case IEEE80211_IF_TYPE_VLAN:
 200                 if (!sdata->u.vlan.ap)
 201                         return -ENOLINK;
 202                 break;
 203         case IEEE80211_IF_TYPE_AP:
 204         case IEEE80211_IF_TYPE_STA:
 205         case IEEE80211_IF_TYPE_MNTR:
 206         case IEEE80211_IF_TYPE_IBSS:
 207                 /* no special treatment */
 208                 break;
 209         case IEEE80211_IF_TYPE_INVALID:
 210                 /* cannot happen */
 211                 WARN_ON(1);
 212                 break;
 213         }
 214
 215         if (local->open_count == 0) {
 216                 res = 0;
 217                 if (local->ops->start)
 218                         res = local->ops->start(local_to_hw(local));
 219                 if (res)
 220                         return res;
 221                 ieee80211_hw_config(local);
 222                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 223         }
 224
 225         switch (sdata->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->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->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         /* down all dependent devices, that is VLANs */
 325         if (sdata->type == IEEE80211_IF_TYPE_AP) {
 326                 struct ieee80211_sub_if_data *vlan, *tmp;
 327
 328                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 329                                          u.vlan.list)
 330                         dev_close(vlan->dev);
 331                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 332         }
 333
 334         local->open_count--;
 335
 336         switch (sdata->type) {
 337         case IEEE80211_IF_TYPE_VLAN:
 338                 list_del(&sdata->u.vlan.list);
 339                 sdata->u.vlan.ap = NULL;
 340                 /* no need to tell driver */
 341                 break;
 342         case IEEE80211_IF_TYPE_MNTR:
 343                 local->monitors--;
 344                 if (local->monitors == 0) {
 345                         netif_tx_lock_bh(local->mdev);
 346                         ieee80211_configure_filter(local);
 347                         netif_tx_unlock_bh(local->mdev);
 348
 349                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 350                 }
 351                 break;
 352         case IEEE80211_IF_TYPE_STA:
 353         case IEEE80211_IF_TYPE_IBSS:
 354                 sdata->u.sta.state = IEEE80211_DISABLED;
 355                 del_timer_sync(&sdata->u.sta.timer);
 356                 /*
 357                  * When we get here, the interface is marked down.
 358                  * Call synchronize_rcu() to wait for the RX path
 359                  * should it be using the interface and enqueuing
 360                  * frames at this very time on another CPU.
 361                  */
 362                 synchronize_rcu();
 363                 skb_queue_purge(&sdata->u.sta.skb_queue);
 364
 365                 if (local->scan_dev == sdata->dev) {
 366                         if (!local->ops->hw_scan) {
 367                                 local->sta_sw_scanning = 0;
 368                                 cancel_delayed_work(&local->scan_work);
 369                         } else
 370                                 local->sta_hw_scanning = 0;
 371                 }
 372
 373                 flush_workqueue(local->hw.workqueue);
 374
 375                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 376                 kfree(sdata->u.sta.extra_ie);
 377                 sdata->u.sta.extra_ie = NULL;
 378                 sdata->u.sta.extra_ie_len = 0;
 379                 /* fall through */
 380         default:
 381                 conf.vif = &sdata->vif;
 382                 conf.type = sdata->type;
 383                 conf.mac_addr = dev->dev_addr;
 384                 /* disable all keys for as long as this netdev is down */
 385                 ieee80211_disable_keys(sdata);
 386                 local->ops->remove_interface(local_to_hw(local), &conf);
 387         }
 388
 389         if (local->open_count == 0) {
 390                 if (netif_running(local->mdev))
 391                         dev_close(local->mdev);
 392
 393                 if (local->ops->stop)
 394                         local->ops->stop(local_to_hw(local));
 395
 396                 ieee80211_led_radio(local, 0);
 397
 398                 tasklet_disable(&local->tx_pending_tasklet);
 399                 tasklet_disable(&local->tasklet);
 400         }
 401
 402         return 0;
 403 }
 404
 405 static void ieee80211_set_multicast_list(struct net_device *dev)
 406 {
 407         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 408         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 409         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 410
 411         allmulti = !!(dev->flags & IFF_ALLMULTI);
 412         promisc = !!(dev->flags & IFF_PROMISC);
 413         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 414         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 415
 416         if (allmulti != sdata_allmulti) {
 417                 if (dev->flags & IFF_ALLMULTI)
 418                         atomic_inc(&local->iff_allmultis);
 419                 else
 420                         atomic_dec(&local->iff_allmultis);
 421                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 422         }
 423
 424         if (promisc != sdata_promisc) {
 425                 if (dev->flags & IFF_PROMISC)
 426                         atomic_inc(&local->iff_promiscs);
 427                 else
 428                         atomic_dec(&local->iff_promiscs);
 429                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 430         }
 431
 432         dev_mc_sync(local->mdev, dev);
 433 }
 434
 435 static const struct header_ops ieee80211_header_ops = {
 436         .create         = eth_header,
 437         .parse          = header_parse_80211,
 438         .rebuild        = eth_rebuild_header,
 439         .cache          = eth_header_cache,
 440         .cache_update   = eth_header_cache_update,
 441 };
 442
 443 /* Must not be called for mdev */
 444 void ieee80211_if_setup(struct net_device *dev)
 445 {
 446         ether_setup(dev);
 447         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 448         dev->wireless_handlers = &ieee80211_iw_handler_def;
 449         dev->set_multicast_list = ieee80211_set_multicast_list;
 450         dev->change_mtu = ieee80211_change_mtu;
 451         dev->open = ieee80211_open;
 452         dev->stop = ieee80211_stop;
 453         dev->destructor = ieee80211_if_free;
 454 }
 455
 456 /* WDS specialties */
 457
 458 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 459 {
 460         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 461         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 462         struct sta_info *sta;
 463         DECLARE_MAC_BUF(mac);
 464
 465         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 466                 return 0;
 467
 468         /* Create STA entry for the new peer */
 469         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 470         if (!sta)
 471                 return -ENOMEM;
 472         sta_info_put(sta);
 473
 474         /* Remove STA entry for the old peer */
 475         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 476         if (sta) {
 477                 sta_info_free(sta);
 478                 sta_info_put(sta);
 479         } else {
 480                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 481                        "peer %s\n",
 482                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 483         }
 484
 485         /* Update WDS link data */
 486         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 487
 488         return 0;
 489 }
 490
 491 /* everything else */
 492
 493 static int __ieee80211_if_config(struct net_device *dev,
 494                                  struct sk_buff *beacon,
 495                                  struct ieee80211_tx_control *control)
 496 {
 497         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 498         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 499         struct ieee80211_if_conf conf;
 500
 501         if (!local->ops->config_interface || !netif_running(dev))
 502                 return 0;
 503
 504         memset(&conf, 0, sizeof(conf));
 505         conf.type = sdata->type;
 506         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 507             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 508                 conf.bssid = sdata->u.sta.bssid;
 509                 conf.ssid = sdata->u.sta.ssid;
 510                 conf.ssid_len = sdata->u.sta.ssid_len;
 511         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 512                 conf.ssid = sdata->u.ap.ssid;
 513                 conf.ssid_len = sdata->u.ap.ssid_len;
 514                 conf.beacon = beacon;
 515                 conf.beacon_control = control;
 516         }
 517         return local->ops->config_interface(local_to_hw(local),
 518                                             &sdata->vif, &conf);
 519 }
 520
 521 int ieee80211_if_config(struct net_device *dev)
 522 {
 523         return __ieee80211_if_config(dev, NULL, NULL);
 524 }
 525
 526 int ieee80211_if_config_beacon(struct net_device *dev)
 527 {
 528         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 529         struct ieee80211_tx_control control;
 530         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 531         struct sk_buff *skb;
 532
 533         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 534                 return 0;
 535         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
 536                                    &control);
 537         if (!skb)
 538                 return -ENOMEM;
 539         return __ieee80211_if_config(dev, skb, &control);
 540 }
 541
 542 int ieee80211_hw_config(struct ieee80211_local *local)
 543 {
 544         struct ieee80211_hw_mode *mode;
 545         struct ieee80211_channel *chan;
 546         int ret = 0;
 547
 548         if (local->sta_sw_scanning) {
 549                 chan = local->scan_channel;
 550                 mode = local->scan_hw_mode;
 551         } else {
 552                 chan = local->oper_channel;
 553                 mode = local->oper_hw_mode;
 554         }
 555
 556         local->hw.conf.channel = chan->chan;
 557         local->hw.conf.channel_val = chan->val;
 558         if (!local->hw.conf.power_level) {
 559                 local->hw.conf.power_level = chan->power_level;
 560         } else {
 561                 local->hw.conf.power_level = min(chan->power_level,
 562                                                  local->hw.conf.power_level);
 563         }
 564         local->hw.conf.freq = chan->freq;
 565         local->hw.conf.phymode = mode->mode;
 566         local->hw.conf.antenna_max = chan->antenna_max;
 567         local->hw.conf.chan = chan;
 568         local->hw.conf.mode = mode;
 569
 570 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 571         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 572                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 573                local->hw.conf.phymode);
 574 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 575
 576         if (local->open_count)
 577                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 578
 579         return ret;
 580 }
 581
 582 /**
 583  * ieee80211_hw_config_ht should be used only after legacy configuration
 584  * has been determined, as ht configuration depends upon the hardware's
 585  * HT abilities for a _specific_ band.
 586  */
 587 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 588                            struct ieee80211_ht_info *req_ht_cap,
 589                            struct ieee80211_ht_bss_info *req_bss_cap)
 590 {
 591         struct ieee80211_conf *conf = &local->hw.conf;
 592         struct ieee80211_hw_mode *mode = conf->mode;
 593         int i;
 594
 595         /* HT is not supported */
 596         if (!mode->ht_info.ht_supported) {
 597                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 598                 return -EOPNOTSUPP;
 599         }
 600
 601         /* disable HT */
 602         if (!enable_ht) {
 603                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 604         } else {
 605                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
 606                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
 607                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
 608                 conf->ht_conf.cap |=
 609                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
 610                 conf->ht_bss_conf.primary_channel =
 611                         req_bss_cap->primary_channel;
 612                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
 613                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
 614                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
 615                         conf->ht_conf.supp_mcs_set[i] =
 616                                 mode->ht_info.supp_mcs_set[i] &
 617                                   req_ht_cap->supp_mcs_set[i];
 618
 619                 /* In STA mode, this gives us indication
 620                  * to the AP's mode of operation */
 621                 conf->ht_conf.ht_supported = 1;
 622                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
 623                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
 624         }
 625
 626         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
 627
 628         return 0;
 629 }
 630
 631 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 632 {
 633         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 634         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 635         if (local->ops->erp_ie_changed)
 636                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 637                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 638                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 639 }
 640
 641 void ieee80211_reset_erp_info(struct net_device *dev)
 642 {
 643         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 644
 645         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 646                         IEEE80211_SDATA_SHORT_PREAMBLE);
 647         ieee80211_erp_info_change_notify(dev,
 648                                          IEEE80211_ERP_CHANGE_PROTECTION |
 649                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 650 }
 651
 652 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 653                                  struct sk_buff *skb,
 654                                  struct ieee80211_tx_status *status)
 655 {
 656         struct ieee80211_local *local = hw_to_local(hw);
 657         struct ieee80211_tx_status *saved;
 658         int tmp;
 659
 660         skb->dev = local->mdev;
 661         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 662         if (unlikely(!saved)) {
 663                 if (net_ratelimit())
 664                         printk(KERN_WARNING "%s: Not enough memory, "
 665                                "dropping tx status", skb->dev->name);
 666                 /* should be dev_kfree_skb_irq, but due to this function being
 667                  * named _irqsafe instead of just _irq we can't be sure that
 668                  * people won't call it from non-irq contexts */
 669                 dev_kfree_skb_any(skb);
 670                 return;
 671         }
 672         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 673         /* copy pointer to saved status into skb->cb for use by tasklet */
 674         memcpy(skb->cb, &saved, sizeof(saved));
 675
 676         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 677         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 678                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 679         tmp = skb_queue_len(&local->skb_queue) +
 680                 skb_queue_len(&local->skb_queue_unreliable);
 681         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 682                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 683                 memcpy(&saved, skb->cb, sizeof(saved));
 684                 kfree(saved);
 685                 dev_kfree_skb_irq(skb);
 686                 tmp--;
 687                 I802_DEBUG_INC(local->tx_status_drop);
 688         }
 689         tasklet_schedule(&local->tasklet);
 690 }
 691 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 692
 693 static void ieee80211_tasklet_handler(unsigned long data)
 694 {
 695         struct ieee80211_local *local = (struct ieee80211_local *) data;
 696         struct sk_buff *skb;
 697         struct ieee80211_rx_status rx_status;
 698         struct ieee80211_tx_status *tx_status;
 699
 700         while ((skb = skb_dequeue(&local->skb_queue)) ||
 701                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 702                 switch (skb->pkt_type) {
 703                 case IEEE80211_RX_MSG:
 704                         /* status is in skb->cb */
 705                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 706                         /* Clear skb->type in order to not confuse kernel
 707                          * netstack. */
 708                         skb->pkt_type = 0;
 709                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 710                         break;
 711                 case IEEE80211_TX_STATUS_MSG:
 712                         /* get pointer to saved status out of skb->cb */
 713                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 714                         skb->pkt_type = 0;
 715                         ieee80211_tx_status(local_to_hw(local),
 716                                             skb, tx_status);
 717                         kfree(tx_status);
 718                         break;
 719                 default: /* should never get here! */
 720                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 721                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 722                         dev_kfree_skb(skb);
 723                         break;
 724                 }
 725         }
 726 }
 727
 728 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 729  * make a prepared TX frame (one that has been given to hw) to look like brand
 730  * new IEEE 802.11 frame that is ready to go through TX processing again.
 731  * Also, tx_packet_data in cb is restored from tx_control. */
 732 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 733                                       struct ieee80211_key *key,
 734                                       struct sk_buff *skb,
 735                                       struct ieee80211_tx_control *control)
 736 {
 737         int hdrlen, iv_len, mic_len;
 738         struct ieee80211_tx_packet_data *pkt_data;
 739
 740         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 741         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
 742         pkt_data->flags = 0;
 743         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 744                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 745         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 746                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 747         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 748                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 749         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 750                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 751         pkt_data->queue = control->queue;
 752
 753         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 754
 755         if (!key)
 756                 goto no_key;
 757
 758         switch (key->conf.alg) {
 759         case ALG_WEP:
 760                 iv_len = WEP_IV_LEN;
 761                 mic_len = WEP_ICV_LEN;
 762                 break;
 763         case ALG_TKIP:
 764                 iv_len = TKIP_IV_LEN;
 765                 mic_len = TKIP_ICV_LEN;
 766                 break;
 767         case ALG_CCMP:
 768                 iv_len = CCMP_HDR_LEN;
 769                 mic_len = CCMP_MIC_LEN;
 770                 break;
 771         default:
 772                 goto no_key;
 773         }
 774
 775         if (skb->len >= mic_len &&
 776             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 777                 skb_trim(skb, skb->len - mic_len);
 778         if (skb->len >= iv_len && skb->len > hdrlen) {
 779                 memmove(skb->data + iv_len, skb->data, hdrlen);
 780                 skb_pull(skb, iv_len);
 781         }
 782
 783 no_key:
 784         {
 785                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 786                 u16 fc = le16_to_cpu(hdr->frame_control);
 787                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 788                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 789                         hdr->frame_control = cpu_to_le16(fc);
 790                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 791                         skb_pull(skb, 2);
 792                 }
 793         }
 794 }
 795
 796 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 797                          struct ieee80211_tx_status *status)
 798 {
 799         struct sk_buff *skb2;
 800         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 801         struct ieee80211_local *local = hw_to_local(hw);
 802         u16 frag, type;
 803         struct ieee80211_tx_status_rtap_hdr *rthdr;
 804         struct ieee80211_sub_if_data *sdata;
 805         int monitors;
 806
 807         if (!status) {
 808                 printk(KERN_ERR
 809                        "%s: ieee80211_tx_status called with NULL status\n",
 810                        wiphy_name(local->hw.wiphy));
 811                 dev_kfree_skb(skb);
 812                 return;
 813         }
 814
 815         if (status->excessive_retries) {
 816                 struct sta_info *sta;
 817                 sta = sta_info_get(local, hdr->addr1);
 818                 if (sta) {
 819                         if (sta->flags & WLAN_STA_PS) {
 820                                 /* The STA is in power save mode, so assume
 821                                  * that this TX packet failed because of that.
 822                                  */
 823                                 status->excessive_retries = 0;
 824                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 825                         }
 826                         sta_info_put(sta);
 827                 }
 828         }
 829
 830         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 831                 struct sta_info *sta;
 832                 sta = sta_info_get(local, hdr->addr1);
 833                 if (sta) {
 834                         sta->tx_filtered_count++;
 835
 836                         /* Clear the TX filter mask for this STA when sending
 837                          * the next packet. If the STA went to power save mode,
 838                          * this will happen when it is waking up for the next
 839                          * time. */
 840                         sta->clear_dst_mask = 1;
 841
 842                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 843                          * the race between RX and TX status causing some
 844                          * packets to be filtered out before 80211.o gets an
 845                          * update for PS status? This seems to be the case, so
 846                          * no changes are likely to be needed. */
 847                         if (sta->flags & WLAN_STA_PS &&
 848                             skb_queue_len(&sta->tx_filtered) <
 849                             STA_MAX_TX_BUFFER) {
 850                                 ieee80211_remove_tx_extra(local, sta->key,
 851                                                           skb,
 852                                                           &status->control);
 853                                 skb_queue_tail(&sta->tx_filtered, skb);
 854                         } else if (!(sta->flags & WLAN_STA_PS) &&
 855                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 856                                 /* Software retry the packet once */
 857                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 858                                 ieee80211_remove_tx_extra(local, sta->key,
 859                                                           skb,
 860                                                           &status->control);
 861                                 dev_queue_xmit(skb);
 862                         } else {
 863                                 if (net_ratelimit()) {
 864                                         printk(KERN_DEBUG "%s: dropped TX "
 865                                                "filtered frame queue_len=%d "
 866                                                "PS=%d @%lu\n",
 867                                                wiphy_name(local->hw.wiphy),
 868                                                skb_queue_len(
 869                                                        &sta->tx_filtered),
 870                                                !!(sta->flags & WLAN_STA_PS),
 871                                                jiffies);
 872                                 }
 873                                 dev_kfree_skb(skb);
 874                         }
 875                         sta_info_put(sta);
 876                         return;
 877                 }
 878         } else
 879                 rate_control_tx_status(local->mdev, skb, status);
 880
 881         ieee80211_led_tx(local, 0);
 882
 883         /* SNMP counters
 884          * Fragments are passed to low-level drivers as separate skbs, so these
 885          * are actually fragments, not frames. Update frame counters only for
 886          * the first fragment of the frame. */
 887
 888         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 889         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 890
 891         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 892                 if (frag == 0) {
 893                         local->dot11TransmittedFrameCount++;
 894                         if (is_multicast_ether_addr(hdr->addr1))
 895                                 local->dot11MulticastTransmittedFrameCount++;
 896                         if (status->retry_count > 0)
 897                                 local->dot11RetryCount++;
 898                         if (status->retry_count > 1)
 899                                 local->dot11MultipleRetryCount++;
 900                 }
 901
 902                 /* This counter shall be incremented for an acknowledged MPDU
 903                  * with an individual address in the address 1 field or an MPDU
 904                  * with a multicast address in the address 1 field of type Data
 905                  * or Management. */
 906                 if (!is_multicast_ether_addr(hdr->addr1) ||
 907                     type == IEEE80211_FTYPE_DATA ||
 908                     type == IEEE80211_FTYPE_MGMT)
 909                         local->dot11TransmittedFragmentCount++;
 910         } else {
 911                 if (frag == 0)
 912                         local->dot11FailedCount++;
 913         }
 914
 915         /* this was a transmitted frame, but now we want to reuse it */
 916         skb_orphan(skb);
 917
 918         if (!local->monitors) {
 919                 dev_kfree_skb(skb);
 920                 return;
 921         }
 922
 923         /* send frame to monitor interfaces now */
 924
 925         if (skb_headroom(skb) < sizeof(*rthdr)) {
 926                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 927                 dev_kfree_skb(skb);
 928                 return;
 929         }
 930
 931         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 932                                 skb_push(skb, sizeof(*rthdr));
 933
 934         memset(rthdr, 0, sizeof(*rthdr));
 935         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 936         rthdr->hdr.it_present =
 937                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 938                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 939
 940         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 941             !is_multicast_ether_addr(hdr->addr1))
 942                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 943
 944         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 945             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 946                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 947         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 948                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 949
 950         rthdr->data_retries = status->retry_count;
 951
 952         rcu_read_lock();
 953         monitors = local->monitors;
 954         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 955                 /*
 956                  * Using the monitors counter is possibly racy, but
 957                  * if the value is wrong we simply either clone the skb
 958                  * once too much or forget sending it to one monitor iface
 959                  * The latter case isn't nice but fixing the race is much
 960                  * more complicated.
 961                  */
 962                 if (!monitors || !skb)
 963                         goto out;
 964
 965                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 966                         if (!netif_running(sdata->dev))
 967                                 continue;
 968                         monitors--;
 969                         if (monitors)
 970                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 971                         else
 972                                 skb2 = NULL;
 973                         skb->dev = sdata->dev;
 974                         /* XXX: is this sufficient for BPF? */
 975                         skb_set_mac_header(skb, 0);
 976                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 977                         skb->pkt_type = PACKET_OTHERHOST;
 978                         skb->protocol = htons(ETH_P_802_2);
 979                         memset(skb->cb, 0, sizeof(skb->cb));
 980                         netif_rx(skb);
 981                         skb = skb2;
 982                 }
 983         }
 984  out:
 985         rcu_read_unlock();
 986         if (skb)
 987                 dev_kfree_skb(skb);
 988 }
 989 EXPORT_SYMBOL(ieee80211_tx_status);
 990
 991 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 992                                         const struct ieee80211_ops *ops)
 993 {
 994         struct net_device *mdev;
 995         struct ieee80211_local *local;
 996         struct ieee80211_sub_if_data *sdata;
 997         int priv_size;
 998         struct wiphy *wiphy;
 999
1000         /* Ensure 32-byte alignment of our private data and hw private data.
1001          * We use the wiphy priv data for both our ieee80211_local and for
1002          * the driver's private data
1003          *
1004          * In memory it'll be like this:
1005          *
1006          * +-------------------------+
1007          * | struct wiphy           |
1008          * +-------------------------+
1009          * | struct ieee80211_local  |
1010          * +-------------------------+
1011          * | driver's private data   |
1012          * +-------------------------+
1013          *
1014          */
1015         priv_size = ((sizeof(struct ieee80211_local) +
1016                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1017                     priv_data_len;
1018
1019         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1020
1021         if (!wiphy)
1022                 return NULL;
1023
1024         wiphy->privid = mac80211_wiphy_privid;
1025
1026         local = wiphy_priv(wiphy);
1027         local->hw.wiphy = wiphy;
1028
1029         local->hw.priv = (char *)local +
1030                          ((sizeof(struct ieee80211_local) +
1031                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1032
1033         BUG_ON(!ops->tx);
1034         BUG_ON(!ops->start);
1035         BUG_ON(!ops->stop);
1036         BUG_ON(!ops->config);
1037         BUG_ON(!ops->add_interface);
1038         BUG_ON(!ops->remove_interface);
1039         BUG_ON(!ops->configure_filter);
1040         local->ops = ops;
1041
1042         /* for now, mdev needs sub_if_data :/ */
1043         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1044                             "wmaster%d", ether_setup);
1045         if (!mdev) {
1046                 wiphy_free(wiphy);
1047                 return NULL;
1048         }
1049
1050         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1051         mdev->ieee80211_ptr = &sdata->wdev;
1052         sdata->wdev.wiphy = wiphy;
1053
1054         local->hw.queues = 1; /* default */
1055
1056         local->mdev = mdev;
1057         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1058         local->rx_handlers = ieee80211_rx_handlers;
1059         local->tx_handlers = ieee80211_tx_handlers;
1060
1061         local->bridge_packets = 1;
1062
1063         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1064         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1065         local->short_retry_limit = 7;
1066         local->long_retry_limit = 4;
1067         local->hw.conf.radio_enabled = 1;
1068
1069         local->enabled_modes = ~0;
1070
1071         INIT_LIST_HEAD(&local->modes_list);
1072
1073         INIT_LIST_HEAD(&local->interfaces);
1074
1075         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1076         ieee80211_rx_bss_list_init(mdev);
1077
1078         sta_info_init(local);
1079
1080         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1081         mdev->open = ieee80211_master_open;
1082         mdev->stop = ieee80211_master_stop;
1083         mdev->type = ARPHRD_IEEE80211;
1084         mdev->header_ops = &ieee80211_header_ops;
1085         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1086
1087         sdata->type = IEEE80211_IF_TYPE_AP;
1088         sdata->dev = mdev;
1089         sdata->local = local;
1090         sdata->u.ap.force_unicast_rateidx = -1;
1091         sdata->u.ap.max_ratectrl_rateidx = -1;
1092         ieee80211_if_sdata_init(sdata);
1093         /* no RCU needed since we're still during init phase */
1094         list_add_tail(&sdata->list, &local->interfaces);
1095
1096         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1097                      (unsigned long)local);
1098         tasklet_disable(&local->tx_pending_tasklet);
1099
1100         tasklet_init(&local->tasklet,
1101                      ieee80211_tasklet_handler,
1102                      (unsigned long) local);
1103         tasklet_disable(&local->tasklet);
1104
1105         skb_queue_head_init(&local->skb_queue);
1106         skb_queue_head_init(&local->skb_queue_unreliable);
1107
1108         return local_to_hw(local);
1109 }
1110 EXPORT_SYMBOL(ieee80211_alloc_hw);
1111
1112 int ieee80211_register_hw(struct ieee80211_hw *hw)
1113 {
1114         struct ieee80211_local *local = hw_to_local(hw);
1115         const char *name;
1116         int result;
1117
1118         result = wiphy_register(local->hw.wiphy);
1119         if (result < 0)
1120                 return result;
1121
1122         name = wiphy_dev(local->hw.wiphy)->driver->name;
1123         local->hw.workqueue = create_singlethread_workqueue(name);
1124         if (!local->hw.workqueue) {
1125                 result = -ENOMEM;
1126                 goto fail_workqueue;
1127         }
1128
1129         /*
1130          * The hardware needs headroom for sending the frame,
1131          * and we need some headroom for passing the frame to monitor
1132          * interfaces, but never both at the same time.
1133          */
1134         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1135                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1136
1137         debugfs_hw_add(local);
1138
1139         local->hw.conf.beacon_int = 1000;
1140
1141         local->wstats_flags |= local->hw.max_rssi ?
1142                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1143         local->wstats_flags |= local->hw.max_signal ?
1144                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1145         local->wstats_flags |= local->hw.max_noise ?
1146                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1147         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1148                 local->wstats_flags |= IW_QUAL_DBM;
1149
1150         result = sta_info_start(local);
1151         if (result < 0)
1152                 goto fail_sta_info;
1153
1154         rtnl_lock();
1155         result = dev_alloc_name(local->mdev, local->mdev->name);
1156         if (result < 0)
1157                 goto fail_dev;
1158
1159         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1160         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1161
1162         result = register_netdevice(local->mdev);
1163         if (result < 0)
1164                 goto fail_dev;
1165
1166         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1167         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1168
1169         result = ieee80211_init_rate_ctrl_alg(local,
1170                                               hw->rate_control_algorithm);
1171         if (result < 0) {
1172                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1173                        "algorithm\n", wiphy_name(local->hw.wiphy));
1174                 goto fail_rate;
1175         }
1176
1177         result = ieee80211_wep_init(local);
1178
1179         if (result < 0) {
1180                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1181                        wiphy_name(local->hw.wiphy));
1182                 goto fail_wep;
1183         }
1184
1185         ieee80211_install_qdisc(local->mdev);
1186
1187         /* add one default STA interface */
1188         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1189                                   IEEE80211_IF_TYPE_STA);
1190         if (result)
1191                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1192                        wiphy_name(local->hw.wiphy));
1193
1194         local->reg_state = IEEE80211_DEV_REGISTERED;
1195         rtnl_unlock();
1196
1197         ieee80211_led_init(local);
1198
1199         return 0;
1200
1201 fail_wep:
1202         rate_control_deinitialize(local);
1203 fail_rate:
1204         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1205         unregister_netdevice(local->mdev);
1206 fail_dev:
1207         rtnl_unlock();
1208         sta_info_stop(local);
1209 fail_sta_info:
1210         debugfs_hw_del(local);
1211         destroy_workqueue(local->hw.workqueue);
1212 fail_workqueue:
1213         wiphy_unregister(local->hw.wiphy);
1214         return result;
1215 }
1216 EXPORT_SYMBOL(ieee80211_register_hw);
1217
1218 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1219                               struct ieee80211_hw_mode *mode)
1220 {
1221         struct ieee80211_local *local = hw_to_local(hw);
1222         struct ieee80211_rate *rate;
1223         int i;
1224
1225         INIT_LIST_HEAD(&mode->list);
1226         list_add_tail(&mode->list, &local->modes_list);
1227
1228         local->hw_modes |= (1 << mode->mode);
1229         for (i = 0; i < mode->num_rates; i++) {
1230                 rate = &(mode->rates[i]);
1231                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1232         }
1233         ieee80211_prepare_rates(local, mode);
1234
1235         if (!local->oper_hw_mode) {
1236                 /* Default to this mode */
1237                 local->hw.conf.phymode = mode->mode;
1238                 local->oper_hw_mode = local->scan_hw_mode = mode;
1239                 local->oper_channel = local->scan_channel = &mode->channels[0];
1240                 local->hw.conf.mode = local->oper_hw_mode;
1241                 local->hw.conf.chan = local->oper_channel;
1242         }
1243
1244         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1245                 ieee80211_set_default_regdomain(mode);
1246
1247         return 0;
1248 }
1249 EXPORT_SYMBOL(ieee80211_register_hwmode);
1250
1251 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1252 {
1253         struct ieee80211_local *local = hw_to_local(hw);
1254         struct ieee80211_sub_if_data *sdata, *tmp;
1255         int i;
1256
1257         tasklet_kill(&local->tx_pending_tasklet);
1258         tasklet_kill(&local->tasklet);
1259
1260         rtnl_lock();
1261
1262         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1263
1264         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1265
1266         /*
1267          * At this point, interface list manipulations are fine
1268          * because the driver cannot be handing us frames any
1269          * more and the tasklet is killed.
1270          */
1271
1272         /*
1273          * First, we remove all non-master interfaces. Do this because they
1274          * may have bss pointer dependency on the master, and when we free
1275          * the master these would be freed as well, breaking our list
1276          * iteration completely.
1277          */
1278         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1279                 if (sdata->dev == local->mdev)
1280                         continue;
1281                 list_del(&sdata->list);
1282                 __ieee80211_if_del(local, sdata);
1283         }
1284
1285         /* then, finally, remove the master interface */
1286         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1287
1288         rtnl_unlock();
1289
1290         ieee80211_rx_bss_list_deinit(local->mdev);
1291         ieee80211_clear_tx_pending(local);
1292         sta_info_stop(local);
1293         rate_control_deinitialize(local);
1294         debugfs_hw_del(local);
1295
1296         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1297                 kfree(local->supp_rates[i]);
1298                 kfree(local->basic_rates[i]);
1299         }
1300
1301         if (skb_queue_len(&local->skb_queue)
1302                         || skb_queue_len(&local->skb_queue_unreliable))
1303                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1304                        wiphy_name(local->hw.wiphy));
1305         skb_queue_purge(&local->skb_queue);
1306         skb_queue_purge(&local->skb_queue_unreliable);
1307
1308         destroy_workqueue(local->hw.workqueue);
1309         wiphy_unregister(local->hw.wiphy);
1310         ieee80211_wep_free(local);
1311         ieee80211_led_exit(local);
1312 }
1313 EXPORT_SYMBOL(ieee80211_unregister_hw);
1314
1315 void ieee80211_free_hw(struct ieee80211_hw *hw)
1316 {
1317         struct ieee80211_local *local = hw_to_local(hw);
1318
1319         ieee80211_if_free(local->mdev);
1320         wiphy_free(local->hw.wiphy);
1321 }
1322 EXPORT_SYMBOL(ieee80211_free_hw);
1323
1324 static int __init ieee80211_init(void)
1325 {
1326         struct sk_buff *skb;
1327         int ret;
1328
1329         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1330
1331         ret = rc80211_simple_init();
1332         if (ret)
1333                 goto fail;
1334
1335         ret = rc80211_pid_init();
1336         if (ret)
1337                 goto fail_simple;
1338
1339         ret = ieee80211_wme_register();
1340         if (ret) {
1341                 printk(KERN_DEBUG "ieee80211_init: failed to "
1342                        "initialize WME (err=%d)\n", ret);
1343                 goto fail_pid;
1344         }
1345
1346         ieee80211_debugfs_netdev_init();
1347         ieee80211_regdomain_init();
1348
1349         return 0;
1350
1351  fail_pid:
1352         rc80211_simple_exit();
1353  fail_simple:
1354         rc80211_pid_exit();
1355  fail:
1356         return ret;
1357 }
1358
1359 static void __exit ieee80211_exit(void)
1360 {
1361         rc80211_simple_exit();
1362         rc80211_pid_exit();
1363
1364         ieee80211_wme_unregister();
1365         ieee80211_debugfs_netdev_exit();
1366 }
1367
1368
1369 subsys_initcall(ieee80211_init);
1370 module_exit(ieee80211_exit);
1371
1372 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1373 MODULE_LICENSE("GPL");