net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_i.h"
  28 #include "ieee80211_rate.h"
  29 #include "wep.h"
  30 #include "wme.h"
  31 #include "aes_ccm.h"
  32 #include "ieee80211_led.h"
  33 #include "cfg.h"
  34 #include "debugfs.h"
  35 #include "debugfs_netdev.h"
  36
  37 #define SUPP_MCS_SET_LEN 16
  38
  39 /*
  40  * For seeing transmitted packets on monitor interfaces
  41  * we have a radiotap header too.
  42  */
  43 struct ieee80211_tx_status_rtap_hdr {
  44         struct ieee80211_radiotap_header hdr;
  45         __le16 tx_flags;
  46         u8 data_retries;
  47 } __attribute__ ((packed));
  48
  49 /* common interface routines */
  50
  51 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  52 {
  53         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  54         return ETH_ALEN;
  55 }
  56
  57 /* must be called under mdev tx lock */
  58 static void ieee80211_configure_filter(struct ieee80211_local *local)
  59 {
  60         unsigned int changed_flags;
  61         unsigned int new_flags = 0;
  62
  63         if (atomic_read(&local->iff_promiscs))
  64                 new_flags |= FIF_PROMISC_IN_BSS;
  65
  66         if (atomic_read(&local->iff_allmultis))
  67                 new_flags |= FIF_ALLMULTI;
  68
  69         if (local->monitors)
  70                 new_flags |= FIF_CONTROL |
  71                              FIF_OTHER_BSS |
  72                              FIF_BCN_PRBRESP_PROMISC;
  73
  74         changed_flags = local->filter_flags ^ new_flags;
  75
  76         /* be a bit nasty */
  77         new_flags |= (1<<31);
  78
  79         local->ops->configure_filter(local_to_hw(local),
  80                                      changed_flags, &new_flags,
  81                                      local->mdev->mc_count,
  82                                      local->mdev->mc_list);
  83
  84         WARN_ON(new_flags & (1<<31));
  85
  86         local->filter_flags = new_flags & ~(1<<31);
  87 }
  88
  89 /* master interface */
  90
  91 static int ieee80211_master_open(struct net_device *dev)
  92 {
  93         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  94         struct ieee80211_sub_if_data *sdata;
  95         int res = -EOPNOTSUPP;
  96
  97         /* we hold the RTNL here so can safely walk the list */
  98         list_for_each_entry(sdata, &local->interfaces, list) {
  99                 if (sdata->dev != dev && netif_running(sdata->dev)) {
 100                         res = 0;
 101                         break;
 102                 }
 103         }
 104         return res;
 105 }
 106
 107 static int ieee80211_master_stop(struct net_device *dev)
 108 {
 109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 110         struct ieee80211_sub_if_data *sdata;
 111
 112         /* we hold the RTNL here so can safely walk the list */
 113         list_for_each_entry(sdata, &local->interfaces, list)
 114                 if (sdata->dev != dev && netif_running(sdata->dev))
 115                         dev_close(sdata->dev);
 116
 117         return 0;
 118 }
 119
 120 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 121 {
 122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 123
 124         ieee80211_configure_filter(local);
 125 }
 126
 127 /* regular interfaces */
 128
 129 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 130 {
 131         /* FIX: what would be proper limits for MTU?
 132          * This interface uses 802.3 frames. */
 133         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 134                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 135                        dev->name, new_mtu);
 136                 return -EINVAL;
 137         }
 138
 139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 140         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 141 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 142         dev->mtu = new_mtu;
 143         return 0;
 144 }
 145
 146 static inline int identical_mac_addr_allowed(int type1, int type2)
 147 {
 148         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 149                 type2 == IEEE80211_IF_TYPE_MNTR ||
 150                 (type1 == IEEE80211_IF_TYPE_AP &&
 151                  type2 == IEEE80211_IF_TYPE_WDS) ||
 152                 (type1 == IEEE80211_IF_TYPE_WDS &&
 153                  (type2 == IEEE80211_IF_TYPE_WDS ||
 154                   type2 == IEEE80211_IF_TYPE_AP)) ||
 155                 (type1 == IEEE80211_IF_TYPE_AP &&
 156                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 157                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 158                  (type2 == IEEE80211_IF_TYPE_AP ||
 159                   type2 == IEEE80211_IF_TYPE_VLAN)));
 160 }
 161
 162 static int ieee80211_open(struct net_device *dev)
 163 {
 164         struct ieee80211_sub_if_data *sdata, *nsdata;
 165         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 166         struct ieee80211_if_init_conf conf;
 167         int res;
 168
 169         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 170
 171         /* we hold the RTNL here so can safely walk the list */
 172         list_for_each_entry(nsdata, &local->interfaces, list) {
 173                 struct net_device *ndev = nsdata->dev;
 174
 175                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 176                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
 177                         /*
 178                          * check whether it may have the same address
 179                          */
 180                         if (!identical_mac_addr_allowed(sdata->vif.type,
 181                                                         nsdata->vif.type))
 182                                 return -ENOTUNIQ;
 183
 184                         /*
 185                          * can only add VLANs to enabled APs
 186                          */
 187                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
 188                             nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
 189                             netif_running(nsdata->dev))
 190                                 sdata->u.vlan.ap = nsdata;
 191                 }
 192         }
 193
 194         switch (sdata->vif.type) {
 195         case IEEE80211_IF_TYPE_WDS:
 196                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
 197                         return -ENOLINK;
 198                 break;
 199         case IEEE80211_IF_TYPE_VLAN:
 200                 if (!sdata->u.vlan.ap)
 201                         return -ENOLINK;
 202                 break;
 203         case IEEE80211_IF_TYPE_AP:
 204         case IEEE80211_IF_TYPE_STA:
 205         case IEEE80211_IF_TYPE_MNTR:
 206         case IEEE80211_IF_TYPE_IBSS:
 207                 /* no special treatment */
 208                 break;
 209         case IEEE80211_IF_TYPE_INVALID:
 210                 /* cannot happen */
 211                 WARN_ON(1);
 212                 break;
 213         }
 214
 215         if (local->open_count == 0) {
 216                 res = 0;
 217                 if (local->ops->start)
 218                         res = local->ops->start(local_to_hw(local));
 219                 if (res)
 220                         return res;
 221                 ieee80211_hw_config(local);
 222                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
 223         }
 224
 225         switch (sdata->vif.type) {
 226         case IEEE80211_IF_TYPE_VLAN:
 227                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 228                 /* no need to tell driver */
 229                 break;
 230         case IEEE80211_IF_TYPE_MNTR:
 231                 /* must be before the call to ieee80211_configure_filter */
 232                 local->monitors++;
 233                 if (local->monitors == 1) {
 234                         netif_tx_lock_bh(local->mdev);
 235                         ieee80211_configure_filter(local);
 236                         netif_tx_unlock_bh(local->mdev);
 237
 238                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 239                 }
 240                 break;
 241         case IEEE80211_IF_TYPE_STA:
 242         case IEEE80211_IF_TYPE_IBSS:
 243                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 244                 /* fall through */
 245         default:
 246                 conf.vif = &sdata->vif;
 247                 conf.type = sdata->vif.type;
 248                 conf.mac_addr = dev->dev_addr;
 249                 res = local->ops->add_interface(local_to_hw(local), &conf);
 250                 if (res && !local->open_count && local->ops->stop)
 251                         local->ops->stop(local_to_hw(local));
 252                 if (res)
 253                         return res;
 254
 255                 ieee80211_if_config(dev);
 256                 ieee80211_reset_erp_info(dev);
 257                 ieee80211_enable_keys(sdata);
 258
 259                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
 260                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
 261                         netif_carrier_off(dev);
 262                 else
 263                         netif_carrier_on(dev);
 264         }
 265
 266         if (local->open_count == 0) {
 267                 res = dev_open(local->mdev);
 268                 WARN_ON(res);
 269                 tasklet_enable(&local->tx_pending_tasklet);
 270                 tasklet_enable(&local->tasklet);
 271         }
 272
 273         /*
 274          * set_multicast_list will be invoked by the networking core
 275          * which will check whether any increments here were done in
 276          * error and sync them down to the hardware as filter flags.
 277          */
 278         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 279                 atomic_inc(&local->iff_allmultis);
 280
 281         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 282                 atomic_inc(&local->iff_promiscs);
 283
 284         local->open_count++;
 285
 286         netif_start_queue(dev);
 287
 288         return 0;
 289 }
 290
 291 static int ieee80211_stop(struct net_device *dev)
 292 {
 293         struct ieee80211_sub_if_data *sdata;
 294         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 295         struct ieee80211_if_init_conf conf;
 296         struct sta_info *sta;
 297         int i;
 298
 299         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 300
 301         list_for_each_entry(sta, &local->sta_list, list) {
 302                 if (sta->dev == dev)
 303                         for (i = 0; i <  STA_TID_NUM; i++)
 304                                 ieee80211_sta_stop_rx_ba_session(sta->dev,
 305                                                 sta->addr, i,
 306                                                 WLAN_BACK_RECIPIENT,
 307                                                 WLAN_REASON_QSTA_LEAVE_QBSS);
 308         }
 309
 310         netif_stop_queue(dev);
 311
 312         /*
 313          * Don't count this interface for promisc/allmulti while it
 314          * is down. dev_mc_unsync() will invoke set_multicast_list
 315          * on the master interface which will sync these down to the
 316          * hardware as filter flags.
 317          */
 318         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 319                 atomic_dec(&local->iff_allmultis);
 320
 321         if (sdata->flags & IEEE80211_SDATA_PROMISC)
 322                 atomic_dec(&local->iff_promiscs);
 323
 324         dev_mc_unsync(local->mdev, dev);
 325
 326         /* APs need special treatment */
 327         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 328                 struct ieee80211_sub_if_data *vlan, *tmp;
 329                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
 330
 331                 /* remove beacon */
 332                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
 333                 synchronize_rcu();
 334                 kfree(old_beacon);
 335
 336                 /* down all dependent devices, that is VLANs */
 337                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 338                                          u.vlan.list)
 339                         dev_close(vlan->dev);
 340                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 341         }
 342
 343         local->open_count--;
 344
 345         switch (sdata->vif.type) {
 346         case IEEE80211_IF_TYPE_VLAN:
 347                 list_del(&sdata->u.vlan.list);
 348                 sdata->u.vlan.ap = NULL;
 349                 /* no need to tell driver */
 350                 break;
 351         case IEEE80211_IF_TYPE_MNTR:
 352                 local->monitors--;
 353                 if (local->monitors == 0) {
 354                         netif_tx_lock_bh(local->mdev);
 355                         ieee80211_configure_filter(local);
 356                         netif_tx_unlock_bh(local->mdev);
 357
 358                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 359                 }
 360                 break;
 361         case IEEE80211_IF_TYPE_STA:
 362         case IEEE80211_IF_TYPE_IBSS:
 363                 sdata->u.sta.state = IEEE80211_DISABLED;
 364                 del_timer_sync(&sdata->u.sta.timer);
 365                 /*
 366                  * When we get here, the interface is marked down.
 367                  * Call synchronize_rcu() to wait for the RX path
 368                  * should it be using the interface and enqueuing
 369                  * frames at this very time on another CPU.
 370                  */
 371                 synchronize_rcu();
 372                 skb_queue_purge(&sdata->u.sta.skb_queue);
 373
 374                 if (local->scan_dev == sdata->dev) {
 375                         if (!local->ops->hw_scan) {
 376                                 local->sta_sw_scanning = 0;
 377                                 cancel_delayed_work(&local->scan_work);
 378                         } else
 379                                 local->sta_hw_scanning = 0;
 380                 }
 381
 382                 flush_workqueue(local->hw.workqueue);
 383
 384                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
 385                 kfree(sdata->u.sta.extra_ie);
 386                 sdata->u.sta.extra_ie = NULL;
 387                 sdata->u.sta.extra_ie_len = 0;
 388                 /* fall through */
 389         default:
 390                 conf.vif = &sdata->vif;
 391                 conf.type = sdata->vif.type;
 392                 conf.mac_addr = dev->dev_addr;
 393                 /* disable all keys for as long as this netdev is down */
 394                 ieee80211_disable_keys(sdata);
 395                 local->ops->remove_interface(local_to_hw(local), &conf);
 396         }
 397
 398         if (local->open_count == 0) {
 399                 if (netif_running(local->mdev))
 400                         dev_close(local->mdev);
 401
 402                 if (local->ops->stop)
 403                         local->ops->stop(local_to_hw(local));
 404
 405                 ieee80211_led_radio(local, 0);
 406
 407                 tasklet_disable(&local->tx_pending_tasklet);
 408                 tasklet_disable(&local->tasklet);
 409         }
 410
 411         return 0;
 412 }
 413
 414 static void ieee80211_set_multicast_list(struct net_device *dev)
 415 {
 416         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 417         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 418         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 419
 420         allmulti = !!(dev->flags & IFF_ALLMULTI);
 421         promisc = !!(dev->flags & IFF_PROMISC);
 422         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
 423         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
 424
 425         if (allmulti != sdata_allmulti) {
 426                 if (dev->flags & IFF_ALLMULTI)
 427                         atomic_inc(&local->iff_allmultis);
 428                 else
 429                         atomic_dec(&local->iff_allmultis);
 430                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 431         }
 432
 433         if (promisc != sdata_promisc) {
 434                 if (dev->flags & IFF_PROMISC)
 435                         atomic_inc(&local->iff_promiscs);
 436                 else
 437                         atomic_dec(&local->iff_promiscs);
 438                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 439         }
 440
 441         dev_mc_sync(local->mdev, dev);
 442 }
 443
 444 static const struct header_ops ieee80211_header_ops = {
 445         .create         = eth_header,
 446         .parse          = header_parse_80211,
 447         .rebuild        = eth_rebuild_header,
 448         .cache          = eth_header_cache,
 449         .cache_update   = eth_header_cache_update,
 450 };
 451
 452 /* Must not be called for mdev */
 453 void ieee80211_if_setup(struct net_device *dev)
 454 {
 455         ether_setup(dev);
 456         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 457         dev->wireless_handlers = &ieee80211_iw_handler_def;
 458         dev->set_multicast_list = ieee80211_set_multicast_list;
 459         dev->change_mtu = ieee80211_change_mtu;
 460         dev->open = ieee80211_open;
 461         dev->stop = ieee80211_stop;
 462         dev->destructor = ieee80211_if_free;
 463 }
 464
 465 /* WDS specialties */
 466
 467 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 468 {
 469         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 470         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 471         struct sta_info *sta;
 472         DECLARE_MAC_BUF(mac);
 473
 474         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 475                 return 0;
 476
 477         /* Create STA entry for the new peer */
 478         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 479         if (!sta)
 480                 return -ENOMEM;
 481         sta_info_put(sta);
 482
 483         /* Remove STA entry for the old peer */
 484         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 485         if (sta) {
 486                 sta_info_free(sta);
 487                 sta_info_put(sta);
 488         } else {
 489                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 490                        "peer %s\n",
 491                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 492         }
 493
 494         /* Update WDS link data */
 495         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 496
 497         return 0;
 498 }
 499
 500 /* everything else */
 501
 502 static int __ieee80211_if_config(struct net_device *dev,
 503                                  struct sk_buff *beacon,
 504                                  struct ieee80211_tx_control *control)
 505 {
 506         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 507         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 508         struct ieee80211_if_conf conf;
 509
 510         if (!local->ops->config_interface || !netif_running(dev))
 511                 return 0;
 512
 513         memset(&conf, 0, sizeof(conf));
 514         conf.type = sdata->vif.type;
 515         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
 516             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
 517                 conf.bssid = sdata->u.sta.bssid;
 518                 conf.ssid = sdata->u.sta.ssid;
 519                 conf.ssid_len = sdata->u.sta.ssid_len;
 520         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
 521                 conf.ssid = sdata->u.ap.ssid;
 522                 conf.ssid_len = sdata->u.ap.ssid_len;
 523                 conf.beacon = beacon;
 524                 conf.beacon_control = control;
 525         }
 526         return local->ops->config_interface(local_to_hw(local),
 527                                             &sdata->vif, &conf);
 528 }
 529
 530 int ieee80211_if_config(struct net_device *dev)
 531 {
 532         return __ieee80211_if_config(dev, NULL, NULL);
 533 }
 534
 535 int ieee80211_if_config_beacon(struct net_device *dev)
 536 {
 537         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 538         struct ieee80211_tx_control control;
 539         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 540         struct sk_buff *skb;
 541
 542         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 543                 return 0;
 544         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
 545                                    &control);
 546         if (!skb)
 547                 return -ENOMEM;
 548         return __ieee80211_if_config(dev, skb, &control);
 549 }
 550
 551 int ieee80211_hw_config(struct ieee80211_local *local)
 552 {
 553         struct ieee80211_hw_mode *mode;
 554         struct ieee80211_channel *chan;
 555         int ret = 0;
 556
 557         if (local->sta_sw_scanning) {
 558                 chan = local->scan_channel;
 559                 mode = local->scan_hw_mode;
 560         } else {
 561                 chan = local->oper_channel;
 562                 mode = local->oper_hw_mode;
 563         }
 564
 565         local->hw.conf.channel = chan->chan;
 566         local->hw.conf.channel_val = chan->val;
 567         if (!local->hw.conf.power_level) {
 568                 local->hw.conf.power_level = chan->power_level;
 569         } else {
 570                 local->hw.conf.power_level = min(chan->power_level,
 571                                                  local->hw.conf.power_level);
 572         }
 573         local->hw.conf.freq = chan->freq;
 574         local->hw.conf.phymode = mode->mode;
 575         local->hw.conf.antenna_max = chan->antenna_max;
 576         local->hw.conf.chan = chan;
 577         local->hw.conf.mode = mode;
 578
 579 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 580         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 581                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 582                local->hw.conf.phymode);
 583 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 584
 585         if (local->open_count)
 586                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 587
 588         return ret;
 589 }
 590
 591 /**
 592  * ieee80211_hw_config_ht should be used only after legacy configuration
 593  * has been determined, as ht configuration depends upon the hardware's
 594  * HT abilities for a _specific_ band.
 595  */
 596 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
 597                            struct ieee80211_ht_info *req_ht_cap,
 598                            struct ieee80211_ht_bss_info *req_bss_cap)
 599 {
 600         struct ieee80211_conf *conf = &local->hw.conf;
 601         struct ieee80211_hw_mode *mode = conf->mode;
 602         int i;
 603
 604         /* HT is not supported */
 605         if (!mode->ht_info.ht_supported) {
 606                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 607                 return -EOPNOTSUPP;
 608         }
 609
 610         /* disable HT */
 611         if (!enable_ht) {
 612                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
 613         } else {
 614                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
 615                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
 616                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
 617                 conf->ht_conf.cap |=
 618                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
 619                 conf->ht_bss_conf.primary_channel =
 620                         req_bss_cap->primary_channel;
 621                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
 622                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
 623                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
 624                         conf->ht_conf.supp_mcs_set[i] =
 625                                 mode->ht_info.supp_mcs_set[i] &
 626                                   req_ht_cap->supp_mcs_set[i];
 627
 628                 /* In STA mode, this gives us indication
 629                  * to the AP's mode of operation */
 630                 conf->ht_conf.ht_supported = 1;
 631                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
 632                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
 633         }
 634
 635         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
 636
 637         return 0;
 638 }
 639
 640 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 641                                       u32 changed)
 642 {
 643         struct ieee80211_local *local = sdata->local;
 644
 645         if (!changed)
 646                 return;
 647
 648         if (local->ops->bss_info_changed)
 649                 local->ops->bss_info_changed(local_to_hw(local),
 650                                              &sdata->vif,
 651                                              &sdata->bss_conf,
 652                                              changed);
 653 }
 654
 655 void ieee80211_reset_erp_info(struct net_device *dev)
 656 {
 657         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 658
 659         sdata->bss_conf.use_cts_prot = 0;
 660         sdata->bss_conf.use_short_preamble = 0;
 661         ieee80211_bss_info_change_notify(sdata,
 662                                          BSS_CHANGED_ERP_CTS_PROT |
 663                                          BSS_CHANGED_ERP_PREAMBLE);
 664 }
 665
 666 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 667                                  struct sk_buff *skb,
 668                                  struct ieee80211_tx_status *status)
 669 {
 670         struct ieee80211_local *local = hw_to_local(hw);
 671         struct ieee80211_tx_status *saved;
 672         int tmp;
 673
 674         skb->dev = local->mdev;
 675         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 676         if (unlikely(!saved)) {
 677                 if (net_ratelimit())
 678                         printk(KERN_WARNING "%s: Not enough memory, "
 679                                "dropping tx status", skb->dev->name);
 680                 /* should be dev_kfree_skb_irq, but due to this function being
 681                  * named _irqsafe instead of just _irq we can't be sure that
 682                  * people won't call it from non-irq contexts */
 683                 dev_kfree_skb_any(skb);
 684                 return;
 685         }
 686         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 687         /* copy pointer to saved status into skb->cb for use by tasklet */
 688         memcpy(skb->cb, &saved, sizeof(saved));
 689
 690         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 691         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 692                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 693         tmp = skb_queue_len(&local->skb_queue) +
 694                 skb_queue_len(&local->skb_queue_unreliable);
 695         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 696                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 697                 memcpy(&saved, skb->cb, sizeof(saved));
 698                 kfree(saved);
 699                 dev_kfree_skb_irq(skb);
 700                 tmp--;
 701                 I802_DEBUG_INC(local->tx_status_drop);
 702         }
 703         tasklet_schedule(&local->tasklet);
 704 }
 705 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 706
 707 static void ieee80211_tasklet_handler(unsigned long data)
 708 {
 709         struct ieee80211_local *local = (struct ieee80211_local *) data;
 710         struct sk_buff *skb;
 711         struct ieee80211_rx_status rx_status;
 712         struct ieee80211_tx_status *tx_status;
 713
 714         while ((skb = skb_dequeue(&local->skb_queue)) ||
 715                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 716                 switch (skb->pkt_type) {
 717                 case IEEE80211_RX_MSG:
 718                         /* status is in skb->cb */
 719                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 720                         /* Clear skb->pkt_type in order to not confuse kernel
 721                          * netstack. */
 722                         skb->pkt_type = 0;
 723                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 724                         break;
 725                 case IEEE80211_TX_STATUS_MSG:
 726                         /* get pointer to saved status out of skb->cb */
 727                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 728                         skb->pkt_type = 0;
 729                         ieee80211_tx_status(local_to_hw(local),
 730                                             skb, tx_status);
 731                         kfree(tx_status);
 732                         break;
 733                 default: /* should never get here! */
 734                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 735                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 736                         dev_kfree_skb(skb);
 737                         break;
 738                 }
 739         }
 740 }
 741
 742 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 743  * make a prepared TX frame (one that has been given to hw) to look like brand
 744  * new IEEE 802.11 frame that is ready to go through TX processing again.
 745  * Also, tx_packet_data in cb is restored from tx_control. */
 746 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 747                                       struct ieee80211_key *key,
 748                                       struct sk_buff *skb,
 749                                       struct ieee80211_tx_control *control)
 750 {
 751         int hdrlen, iv_len, mic_len;
 752         struct ieee80211_tx_packet_data *pkt_data;
 753
 754         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 755         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
 756         pkt_data->flags = 0;
 757         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 758                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 759         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 760                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 761         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 762                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 763         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
 764                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
 765         pkt_data->queue = control->queue;
 766
 767         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 768
 769         if (!key)
 770                 goto no_key;
 771
 772         switch (key->conf.alg) {
 773         case ALG_WEP:
 774                 iv_len = WEP_IV_LEN;
 775                 mic_len = WEP_ICV_LEN;
 776                 break;
 777         case ALG_TKIP:
 778                 iv_len = TKIP_IV_LEN;
 779                 mic_len = TKIP_ICV_LEN;
 780                 break;
 781         case ALG_CCMP:
 782                 iv_len = CCMP_HDR_LEN;
 783                 mic_len = CCMP_MIC_LEN;
 784                 break;
 785         default:
 786                 goto no_key;
 787         }
 788
 789         if (skb->len >= mic_len &&
 790             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 791                 skb_trim(skb, skb->len - mic_len);
 792         if (skb->len >= iv_len && skb->len > hdrlen) {
 793                 memmove(skb->data + iv_len, skb->data, hdrlen);
 794                 skb_pull(skb, iv_len);
 795         }
 796
 797 no_key:
 798         {
 799                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 800                 u16 fc = le16_to_cpu(hdr->frame_control);
 801                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 802                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 803                         hdr->frame_control = cpu_to_le16(fc);
 804                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 805                         skb_pull(skb, 2);
 806                 }
 807         }
 808 }
 809
 810 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 811                          struct ieee80211_tx_status *status)
 812 {
 813         struct sk_buff *skb2;
 814         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 815         struct ieee80211_local *local = hw_to_local(hw);
 816         u16 frag, type;
 817         struct ieee80211_tx_status_rtap_hdr *rthdr;
 818         struct ieee80211_sub_if_data *sdata;
 819         int monitors;
 820
 821         if (!status) {
 822                 printk(KERN_ERR
 823                        "%s: ieee80211_tx_status called with NULL status\n",
 824                        wiphy_name(local->hw.wiphy));
 825                 dev_kfree_skb(skb);
 826                 return;
 827         }
 828
 829         if (status->excessive_retries) {
 830                 struct sta_info *sta;
 831                 sta = sta_info_get(local, hdr->addr1);
 832                 if (sta) {
 833                         if (sta->flags & WLAN_STA_PS) {
 834                                 /* The STA is in power save mode, so assume
 835                                  * that this TX packet failed because of that.
 836                                  */
 837                                 status->excessive_retries = 0;
 838                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 839                         }
 840                         sta_info_put(sta);
 841                 }
 842         }
 843
 844         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 845                 struct sta_info *sta;
 846                 sta = sta_info_get(local, hdr->addr1);
 847                 if (sta) {
 848                         sta->tx_filtered_count++;
 849
 850                         /* Clear the TX filter mask for this STA when sending
 851                          * the next packet. If the STA went to power save mode,
 852                          * this will happen when it is waking up for the next
 853                          * time. */
 854                         sta->clear_dst_mask = 1;
 855
 856                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 857                          * the race between RX and TX status causing some
 858                          * packets to be filtered out before 80211.o gets an
 859                          * update for PS status? This seems to be the case, so
 860                          * no changes are likely to be needed. */
 861                         if (sta->flags & WLAN_STA_PS &&
 862                             skb_queue_len(&sta->tx_filtered) <
 863                             STA_MAX_TX_BUFFER) {
 864                                 ieee80211_remove_tx_extra(local, sta->key,
 865                                                           skb,
 866                                                           &status->control);
 867                                 skb_queue_tail(&sta->tx_filtered, skb);
 868                         } else if (!(sta->flags & WLAN_STA_PS) &&
 869                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 870                                 /* Software retry the packet once */
 871                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 872                                 ieee80211_remove_tx_extra(local, sta->key,
 873                                                           skb,
 874                                                           &status->control);
 875                                 dev_queue_xmit(skb);
 876                         } else {
 877                                 if (net_ratelimit()) {
 878                                         printk(KERN_DEBUG "%s: dropped TX "
 879                                                "filtered frame queue_len=%d "
 880                                                "PS=%d @%lu\n",
 881                                                wiphy_name(local->hw.wiphy),
 882                                                skb_queue_len(
 883                                                        &sta->tx_filtered),
 884                                                !!(sta->flags & WLAN_STA_PS),
 885                                                jiffies);
 886                                 }
 887                                 dev_kfree_skb(skb);
 888                         }
 889                         sta_info_put(sta);
 890                         return;
 891                 }
 892         } else
 893                 rate_control_tx_status(local->mdev, skb, status);
 894
 895         ieee80211_led_tx(local, 0);
 896
 897         /* SNMP counters
 898          * Fragments are passed to low-level drivers as separate skbs, so these
 899          * are actually fragments, not frames. Update frame counters only for
 900          * the first fragment of the frame. */
 901
 902         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 903         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 904
 905         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 906                 if (frag == 0) {
 907                         local->dot11TransmittedFrameCount++;
 908                         if (is_multicast_ether_addr(hdr->addr1))
 909                                 local->dot11MulticastTransmittedFrameCount++;
 910                         if (status->retry_count > 0)
 911                                 local->dot11RetryCount++;
 912                         if (status->retry_count > 1)
 913                                 local->dot11MultipleRetryCount++;
 914                 }
 915
 916                 /* This counter shall be incremented for an acknowledged MPDU
 917                  * with an individual address in the address 1 field or an MPDU
 918                  * with a multicast address in the address 1 field of type Data
 919                  * or Management. */
 920                 if (!is_multicast_ether_addr(hdr->addr1) ||
 921                     type == IEEE80211_FTYPE_DATA ||
 922                     type == IEEE80211_FTYPE_MGMT)
 923                         local->dot11TransmittedFragmentCount++;
 924         } else {
 925                 if (frag == 0)
 926                         local->dot11FailedCount++;
 927         }
 928
 929         /* this was a transmitted frame, but now we want to reuse it */
 930         skb_orphan(skb);
 931
 932         if (!local->monitors) {
 933                 dev_kfree_skb(skb);
 934                 return;
 935         }
 936
 937         /* send frame to monitor interfaces now */
 938
 939         if (skb_headroom(skb) < sizeof(*rthdr)) {
 940                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 941                 dev_kfree_skb(skb);
 942                 return;
 943         }
 944
 945         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 946                                 skb_push(skb, sizeof(*rthdr));
 947
 948         memset(rthdr, 0, sizeof(*rthdr));
 949         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 950         rthdr->hdr.it_present =
 951                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 952                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 953
 954         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 955             !is_multicast_ether_addr(hdr->addr1))
 956                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 957
 958         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 959             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 960                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 961         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 962                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 963
 964         rthdr->data_retries = status->retry_count;
 965
 966         rcu_read_lock();
 967         monitors = local->monitors;
 968         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 969                 /*
 970                  * Using the monitors counter is possibly racy, but
 971                  * if the value is wrong we simply either clone the skb
 972                  * once too much or forget sending it to one monitor iface
 973                  * The latter case isn't nice but fixing the race is much
 974                  * more complicated.
 975                  */
 976                 if (!monitors || !skb)
 977                         goto out;
 978
 979                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
 980                         if (!netif_running(sdata->dev))
 981                                 continue;
 982                         monitors--;
 983                         if (monitors)
 984                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 985                         else
 986                                 skb2 = NULL;
 987                         skb->dev = sdata->dev;
 988                         /* XXX: is this sufficient for BPF? */
 989                         skb_set_mac_header(skb, 0);
 990                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 991                         skb->pkt_type = PACKET_OTHERHOST;
 992                         skb->protocol = htons(ETH_P_802_2);
 993                         memset(skb->cb, 0, sizeof(skb->cb));
 994                         netif_rx(skb);
 995                         skb = skb2;
 996                 }
 997         }
 998  out:
 999         rcu_read_unlock();
1000         if (skb)
1001                 dev_kfree_skb(skb);
1002 }
1003 EXPORT_SYMBOL(ieee80211_tx_status);
1004
1005 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1006                                         const struct ieee80211_ops *ops)
1007 {
1008         struct net_device *mdev;
1009         struct ieee80211_local *local;
1010         struct ieee80211_sub_if_data *sdata;
1011         int priv_size;
1012         struct wiphy *wiphy;
1013
1014         /* Ensure 32-byte alignment of our private data and hw private data.
1015          * We use the wiphy priv data for both our ieee80211_local and for
1016          * the driver's private data
1017          *
1018          * In memory it'll be like this:
1019          *
1020          * +-------------------------+
1021          * | struct wiphy           |
1022          * +-------------------------+
1023          * | struct ieee80211_local  |
1024          * +-------------------------+
1025          * | driver's private data   |
1026          * +-------------------------+
1027          *
1028          */
1029         priv_size = ((sizeof(struct ieee80211_local) +
1030                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1031                     priv_data_len;
1032
1033         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1034
1035         if (!wiphy)
1036                 return NULL;
1037
1038         wiphy->privid = mac80211_wiphy_privid;
1039
1040         local = wiphy_priv(wiphy);
1041         local->hw.wiphy = wiphy;
1042
1043         local->hw.priv = (char *)local +
1044                          ((sizeof(struct ieee80211_local) +
1045                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1046
1047         BUG_ON(!ops->tx);
1048         BUG_ON(!ops->start);
1049         BUG_ON(!ops->stop);
1050         BUG_ON(!ops->config);
1051         BUG_ON(!ops->add_interface);
1052         BUG_ON(!ops->remove_interface);
1053         BUG_ON(!ops->configure_filter);
1054         local->ops = ops;
1055
1056         /* for now, mdev needs sub_if_data :/ */
1057         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1058                             "wmaster%d", ether_setup);
1059         if (!mdev) {
1060                 wiphy_free(wiphy);
1061                 return NULL;
1062         }
1063
1064         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1065         mdev->ieee80211_ptr = &sdata->wdev;
1066         sdata->wdev.wiphy = wiphy;
1067
1068         local->hw.queues = 1; /* default */
1069
1070         local->mdev = mdev;
1071         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1072         local->rx_handlers = ieee80211_rx_handlers;
1073         local->tx_handlers = ieee80211_tx_handlers;
1074
1075         local->bridge_packets = 1;
1076
1077         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1078         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1079         local->short_retry_limit = 7;
1080         local->long_retry_limit = 4;
1081         local->hw.conf.radio_enabled = 1;
1082
1083         local->enabled_modes = ~0;
1084
1085         INIT_LIST_HEAD(&local->modes_list);
1086
1087         INIT_LIST_HEAD(&local->interfaces);
1088
1089         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1090         ieee80211_rx_bss_list_init(mdev);
1091
1092         sta_info_init(local);
1093
1094         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1095         mdev->open = ieee80211_master_open;
1096         mdev->stop = ieee80211_master_stop;
1097         mdev->type = ARPHRD_IEEE80211;
1098         mdev->header_ops = &ieee80211_header_ops;
1099         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1100
1101         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1102         sdata->dev = mdev;
1103         sdata->local = local;
1104         sdata->u.ap.force_unicast_rateidx = -1;
1105         sdata->u.ap.max_ratectrl_rateidx = -1;
1106         ieee80211_if_sdata_init(sdata);
1107         /* no RCU needed since we're still during init phase */
1108         list_add_tail(&sdata->list, &local->interfaces);
1109
1110         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1111                      (unsigned long)local);
1112         tasklet_disable(&local->tx_pending_tasklet);
1113
1114         tasklet_init(&local->tasklet,
1115                      ieee80211_tasklet_handler,
1116                      (unsigned long) local);
1117         tasklet_disable(&local->tasklet);
1118
1119         skb_queue_head_init(&local->skb_queue);
1120         skb_queue_head_init(&local->skb_queue_unreliable);
1121
1122         return local_to_hw(local);
1123 }
1124 EXPORT_SYMBOL(ieee80211_alloc_hw);
1125
1126 int ieee80211_register_hw(struct ieee80211_hw *hw)
1127 {
1128         struct ieee80211_local *local = hw_to_local(hw);
1129         const char *name;
1130         int result;
1131
1132         result = wiphy_register(local->hw.wiphy);
1133         if (result < 0)
1134                 return result;
1135
1136         name = wiphy_dev(local->hw.wiphy)->driver->name;
1137         local->hw.workqueue = create_singlethread_workqueue(name);
1138         if (!local->hw.workqueue) {
1139                 result = -ENOMEM;
1140                 goto fail_workqueue;
1141         }
1142
1143         /*
1144          * The hardware needs headroom for sending the frame,
1145          * and we need some headroom for passing the frame to monitor
1146          * interfaces, but never both at the same time.
1147          */
1148         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1149                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1150
1151         debugfs_hw_add(local);
1152
1153         local->hw.conf.beacon_int = 1000;
1154
1155         local->wstats_flags |= local->hw.max_rssi ?
1156                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1157         local->wstats_flags |= local->hw.max_signal ?
1158                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1159         local->wstats_flags |= local->hw.max_noise ?
1160                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1161         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1162                 local->wstats_flags |= IW_QUAL_DBM;
1163
1164         result = sta_info_start(local);
1165         if (result < 0)
1166                 goto fail_sta_info;
1167
1168         rtnl_lock();
1169         result = dev_alloc_name(local->mdev, local->mdev->name);
1170         if (result < 0)
1171                 goto fail_dev;
1172
1173         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1174         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1175
1176         result = register_netdevice(local->mdev);
1177         if (result < 0)
1178                 goto fail_dev;
1179
1180         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1181         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1182
1183         result = ieee80211_init_rate_ctrl_alg(local,
1184                                               hw->rate_control_algorithm);
1185         if (result < 0) {
1186                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1187                        "algorithm\n", wiphy_name(local->hw.wiphy));
1188                 goto fail_rate;
1189         }
1190
1191         result = ieee80211_wep_init(local);
1192
1193         if (result < 0) {
1194                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1195                        wiphy_name(local->hw.wiphy));
1196                 goto fail_wep;
1197         }
1198
1199         ieee80211_install_qdisc(local->mdev);
1200
1201         /* add one default STA interface */
1202         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1203                                   IEEE80211_IF_TYPE_STA);
1204         if (result)
1205                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1206                        wiphy_name(local->hw.wiphy));
1207
1208         local->reg_state = IEEE80211_DEV_REGISTERED;
1209         rtnl_unlock();
1210
1211         ieee80211_led_init(local);
1212
1213         return 0;
1214
1215 fail_wep:
1216         rate_control_deinitialize(local);
1217 fail_rate:
1218         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1219         unregister_netdevice(local->mdev);
1220 fail_dev:
1221         rtnl_unlock();
1222         sta_info_stop(local);
1223 fail_sta_info:
1224         debugfs_hw_del(local);
1225         destroy_workqueue(local->hw.workqueue);
1226 fail_workqueue:
1227         wiphy_unregister(local->hw.wiphy);
1228         return result;
1229 }
1230 EXPORT_SYMBOL(ieee80211_register_hw);
1231
1232 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1233                               struct ieee80211_hw_mode *mode)
1234 {
1235         struct ieee80211_local *local = hw_to_local(hw);
1236         struct ieee80211_rate *rate;
1237         int i;
1238
1239         INIT_LIST_HEAD(&mode->list);
1240         list_add_tail(&mode->list, &local->modes_list);
1241
1242         local->hw_modes |= (1 << mode->mode);
1243         for (i = 0; i < mode->num_rates; i++) {
1244                 rate = &(mode->rates[i]);
1245                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1246         }
1247         ieee80211_prepare_rates(local, mode);
1248
1249         if (!local->oper_hw_mode) {
1250                 /* Default to this mode */
1251                 local->hw.conf.phymode = mode->mode;
1252                 local->oper_hw_mode = local->scan_hw_mode = mode;
1253                 local->oper_channel = local->scan_channel = &mode->channels[0];
1254                 local->hw.conf.mode = local->oper_hw_mode;
1255                 local->hw.conf.chan = local->oper_channel;
1256         }
1257
1258         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1259                 ieee80211_set_default_regdomain(mode);
1260
1261         return 0;
1262 }
1263 EXPORT_SYMBOL(ieee80211_register_hwmode);
1264
1265 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1266 {
1267         struct ieee80211_local *local = hw_to_local(hw);
1268         struct ieee80211_sub_if_data *sdata, *tmp;
1269         int i;
1270
1271         tasklet_kill(&local->tx_pending_tasklet);
1272         tasklet_kill(&local->tasklet);
1273
1274         rtnl_lock();
1275
1276         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1277
1278         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1279
1280         /*
1281          * At this point, interface list manipulations are fine
1282          * because the driver cannot be handing us frames any
1283          * more and the tasklet is killed.
1284          */
1285
1286         /*
1287          * First, we remove all non-master interfaces. Do this because they
1288          * may have bss pointer dependency on the master, and when we free
1289          * the master these would be freed as well, breaking our list
1290          * iteration completely.
1291          */
1292         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1293                 if (sdata->dev == local->mdev)
1294                         continue;
1295                 list_del(&sdata->list);
1296                 __ieee80211_if_del(local, sdata);
1297         }
1298
1299         /* then, finally, remove the master interface */
1300         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1301
1302         rtnl_unlock();
1303
1304         ieee80211_rx_bss_list_deinit(local->mdev);
1305         ieee80211_clear_tx_pending(local);
1306         sta_info_stop(local);
1307         rate_control_deinitialize(local);
1308         debugfs_hw_del(local);
1309
1310         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1311                 kfree(local->supp_rates[i]);
1312                 kfree(local->basic_rates[i]);
1313         }
1314
1315         if (skb_queue_len(&local->skb_queue)
1316                         || skb_queue_len(&local->skb_queue_unreliable))
1317                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1318                        wiphy_name(local->hw.wiphy));
1319         skb_queue_purge(&local->skb_queue);
1320         skb_queue_purge(&local->skb_queue_unreliable);
1321
1322         destroy_workqueue(local->hw.workqueue);
1323         wiphy_unregister(local->hw.wiphy);
1324         ieee80211_wep_free(local);
1325         ieee80211_led_exit(local);
1326 }
1327 EXPORT_SYMBOL(ieee80211_unregister_hw);
1328
1329 void ieee80211_free_hw(struct ieee80211_hw *hw)
1330 {
1331         struct ieee80211_local *local = hw_to_local(hw);
1332
1333         ieee80211_if_free(local->mdev);
1334         wiphy_free(local->hw.wiphy);
1335 }
1336 EXPORT_SYMBOL(ieee80211_free_hw);
1337
1338 static int __init ieee80211_init(void)
1339 {
1340         struct sk_buff *skb;
1341         int ret;
1342
1343         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1344
1345         ret = rc80211_simple_init();
1346         if (ret)
1347                 goto out;
1348
1349         ret = rc80211_pid_init();
1350         if (ret)
1351                 goto out_cleanup_simple;
1352
1353         ret = ieee80211_wme_register();
1354         if (ret) {
1355                 printk(KERN_DEBUG "ieee80211_init: failed to "
1356                        "initialize WME (err=%d)\n", ret);
1357                 goto out_cleanup_pid;
1358         }
1359
1360         ieee80211_debugfs_netdev_init();
1361         ieee80211_regdomain_init();
1362
1363         return 0;
1364
1365  out_cleanup_pid:
1366         rc80211_pid_exit();
1367  out_cleanup_simple:
1368         rc80211_simple_exit();
1369  out:
1370         return ret;
1371 }
1372
1373 static void __exit ieee80211_exit(void)
1374 {
1375         rc80211_simple_exit();
1376         rc80211_pid_exit();
1377
1378         ieee80211_wme_unregister();
1379         ieee80211_debugfs_netdev_exit();
1380 }
1381
1382
1383 subsys_initcall(ieee80211_init);
1384 module_exit(ieee80211_exit);
1385
1386 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1387 MODULE_LICENSE("GPL");