git.oblomov.eu Git - linux-2.6/blob - net/mac80211/ieee80211.c

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