Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[linux-2.6] / net / mac80211 / ieee80211.c
1 /*
2  * Copyright 2002-2005, Instant802 Networks, Inc.
3  * Copyright 2005-2006, Devicescape Software, Inc.
4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_i.h"
28 #include "ieee80211_rate.h"
29 #include "wep.h"
30 #include "wme.h"
31 #include "aes_ccm.h"
32 #include "ieee80211_led.h"
33 #include "cfg.h"
34 #include "debugfs.h"
35 #include "debugfs_netdev.h"
36
37 #define SUPP_MCS_SET_LEN 16
38
39 /*
40  * For seeing transmitted packets on monitor interfaces
41  * we have a radiotap header too.
42  */
43 struct ieee80211_tx_status_rtap_hdr {
44         struct ieee80211_radiotap_header hdr;
45         __le16 tx_flags;
46         u8 data_retries;
47 } __attribute__ ((packed));
48
49 /* common interface routines */
50
51 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
52 {
53         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
54         return ETH_ALEN;
55 }
56
57 /* must be called under mdev tx lock */
58 static void ieee80211_configure_filter(struct ieee80211_local *local)
59 {
60         unsigned int changed_flags;
61         unsigned int new_flags = 0;
62
63         if (atomic_read(&local->iff_promiscs))
64                 new_flags |= FIF_PROMISC_IN_BSS;
65
66         if (atomic_read(&local->iff_allmultis))
67                 new_flags |= FIF_ALLMULTI;
68
69         if (local->monitors)
70                 new_flags |= FIF_CONTROL |
71                              FIF_OTHER_BSS |
72                              FIF_BCN_PRBRESP_PROMISC;
73
74         changed_flags = local->filter_flags ^ new_flags;
75
76         /* be a bit nasty */
77         new_flags |= (1<<31);
78
79         local->ops->configure_filter(local_to_hw(local),
80                                      changed_flags, &new_flags,
81                                      local->mdev->mc_count,
82                                      local->mdev->mc_list);
83
84         WARN_ON(new_flags & (1<<31));
85
86         local->filter_flags = new_flags & ~(1<<31);
87 }
88
89 /* master interface */
90
91 static int ieee80211_master_open(struct net_device *dev)
92 {
93         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
94         struct ieee80211_sub_if_data *sdata;
95         int res = -EOPNOTSUPP;
96
97         /* we hold the RTNL here so can safely walk the list */
98         list_for_each_entry(sdata, &local->interfaces, list) {
99                 if (sdata->dev != dev && netif_running(sdata->dev)) {
100                         res = 0;
101                         break;
102                 }
103         }
104         return res;
105 }
106
107 static int ieee80211_master_stop(struct net_device *dev)
108 {
109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
110         struct ieee80211_sub_if_data *sdata;
111
112         /* we hold the RTNL here so can safely walk the list */
113         list_for_each_entry(sdata, &local->interfaces, list)
114                 if (sdata->dev != dev && netif_running(sdata->dev))
115                         dev_close(sdata->dev);
116
117         return 0;
118 }
119
120 static void ieee80211_master_set_multicast_list(struct net_device *dev)
121 {
122         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
123
124         ieee80211_configure_filter(local);
125 }
126
127 /* regular interfaces */
128
129 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
130 {
131         /* FIX: what would be proper limits for MTU?
132          * This interface uses 802.3 frames. */
133         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
134                 printk(KERN_WARNING "%s: invalid MTU %d\n",
135                        dev->name, new_mtu);
136                 return -EINVAL;
137         }
138
139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
140         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
141 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
142         dev->mtu = new_mtu;
143         return 0;
144 }
145
146 static inline int identical_mac_addr_allowed(int type1, int type2)
147 {
148         return (type1 == IEEE80211_IF_TYPE_MNTR ||
149                 type2 == IEEE80211_IF_TYPE_MNTR ||
150                 (type1 == IEEE80211_IF_TYPE_AP &&
151                  type2 == IEEE80211_IF_TYPE_WDS) ||
152                 (type1 == IEEE80211_IF_TYPE_WDS &&
153                  (type2 == IEEE80211_IF_TYPE_WDS ||
154                   type2 == IEEE80211_IF_TYPE_AP)) ||
155                 (type1 == IEEE80211_IF_TYPE_AP &&
156                  type2 == IEEE80211_IF_TYPE_VLAN) ||
157                 (type1 == IEEE80211_IF_TYPE_VLAN &&
158                  (type2 == IEEE80211_IF_TYPE_AP ||
159                   type2 == IEEE80211_IF_TYPE_VLAN)));
160 }
161
162 static int ieee80211_open(struct net_device *dev)
163 {
164         struct ieee80211_sub_if_data *sdata, *nsdata;
165         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
166         struct ieee80211_if_init_conf conf;
167         int res;
168         bool need_hw_reconfig = 0;
169
170         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
171
172         /* we hold the RTNL here so can safely walk the list */
173         list_for_each_entry(nsdata, &local->interfaces, list) {
174                 struct net_device *ndev = nsdata->dev;
175
176                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
177                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
178                         /*
179                          * check whether it may have the same address
180                          */
181                         if (!identical_mac_addr_allowed(sdata->vif.type,
182                                                         nsdata->vif.type))
183                                 return -ENOTUNIQ;
184
185                         /*
186                          * can only add VLANs to enabled APs
187                          */
188                         if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
189                             nsdata->vif.type == IEEE80211_IF_TYPE_AP &&
190                             netif_running(nsdata->dev))
191                                 sdata->u.vlan.ap = nsdata;
192                 }
193         }
194
195         switch (sdata->vif.type) {
196         case IEEE80211_IF_TYPE_WDS:
197                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
198                         return -ENOLINK;
199                 break;
200         case IEEE80211_IF_TYPE_VLAN:
201                 if (!sdata->u.vlan.ap)
202                         return -ENOLINK;
203                 break;
204         case IEEE80211_IF_TYPE_AP:
205         case IEEE80211_IF_TYPE_STA:
206         case IEEE80211_IF_TYPE_MNTR:
207         case IEEE80211_IF_TYPE_IBSS:
208                 /* no special treatment */
209                 break;
210         case IEEE80211_IF_TYPE_INVALID:
211                 /* cannot happen */
212                 WARN_ON(1);
213                 break;
214         }
215
216         if (local->open_count == 0) {
217                 res = 0;
218                 if (local->ops->start)
219                         res = local->ops->start(local_to_hw(local));
220                 if (res)
221                         return res;
222                 need_hw_reconfig = 1;
223                 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
224         }
225
226         switch (sdata->vif.type) {
227         case IEEE80211_IF_TYPE_VLAN:
228                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
229                 /* no need to tell driver */
230                 break;
231         case IEEE80211_IF_TYPE_MNTR:
232                 /* must be before the call to ieee80211_configure_filter */
233                 local->monitors++;
234                 if (local->monitors == 1) {
235                         netif_tx_lock_bh(local->mdev);
236                         ieee80211_configure_filter(local);
237                         netif_tx_unlock_bh(local->mdev);
238
239                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
240                 }
241                 break;
242         case IEEE80211_IF_TYPE_STA:
243         case IEEE80211_IF_TYPE_IBSS:
244                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
245                 /* fall through */
246         default:
247                 conf.vif = &sdata->vif;
248                 conf.type = sdata->vif.type;
249                 conf.mac_addr = dev->dev_addr;
250                 res = local->ops->add_interface(local_to_hw(local), &conf);
251                 if (res && !local->open_count && local->ops->stop)
252                         local->ops->stop(local_to_hw(local));
253                 if (res)
254                         return res;
255
256                 ieee80211_if_config(dev);
257                 ieee80211_reset_erp_info(dev);
258                 ieee80211_enable_keys(sdata);
259
260                 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
261                     !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
262                         netif_carrier_off(dev);
263                 else
264                         netif_carrier_on(dev);
265         }
266
267         if (local->open_count == 0) {
268                 res = dev_open(local->mdev);
269                 WARN_ON(res);
270                 tasklet_enable(&local->tx_pending_tasklet);
271                 tasklet_enable(&local->tasklet);
272         }
273
274         /*
275          * set_multicast_list will be invoked by the networking core
276          * which will check whether any increments here were done in
277          * error and sync them down to the hardware as filter flags.
278          */
279         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
280                 atomic_inc(&local->iff_allmultis);
281
282         if (sdata->flags & IEEE80211_SDATA_PROMISC)
283                 atomic_inc(&local->iff_promiscs);
284
285         local->open_count++;
286         if (need_hw_reconfig)
287                 ieee80211_hw_config(local);
288
289         netif_start_queue(dev);
290
291         return 0;
292 }
293
294 static int ieee80211_stop(struct net_device *dev)
295 {
296         struct ieee80211_sub_if_data *sdata;
297         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
298         struct ieee80211_if_init_conf conf;
299         struct sta_info *sta;
300         int i;
301
302         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
303
304         list_for_each_entry(sta, &local->sta_list, list) {
305                 if (sta->dev == dev)
306                         for (i = 0; i <  STA_TID_NUM; i++)
307                                 ieee80211_sta_stop_rx_ba_session(sta->dev,
308                                                 sta->addr, i,
309                                                 WLAN_BACK_RECIPIENT,
310                                                 WLAN_REASON_QSTA_LEAVE_QBSS);
311         }
312
313         netif_stop_queue(dev);
314
315         /*
316          * Don't count this interface for promisc/allmulti while it
317          * is down. dev_mc_unsync() will invoke set_multicast_list
318          * on the master interface which will sync these down to the
319          * hardware as filter flags.
320          */
321         if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
322                 atomic_dec(&local->iff_allmultis);
323
324         if (sdata->flags & IEEE80211_SDATA_PROMISC)
325                 atomic_dec(&local->iff_promiscs);
326
327         dev_mc_unsync(local->mdev, dev);
328
329         /* APs need special treatment */
330         if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
331                 struct ieee80211_sub_if_data *vlan, *tmp;
332                 struct beacon_data *old_beacon = sdata->u.ap.beacon;
333
334                 /* remove beacon */
335                 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
336                 synchronize_rcu();
337                 kfree(old_beacon);
338
339                 /* down all dependent devices, that is VLANs */
340                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
341                                          u.vlan.list)
342                         dev_close(vlan->dev);
343                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
344         }
345
346         local->open_count--;
347
348         switch (sdata->vif.type) {
349         case IEEE80211_IF_TYPE_VLAN:
350                 list_del(&sdata->u.vlan.list);
351                 sdata->u.vlan.ap = NULL;
352                 /* no need to tell driver */
353                 break;
354         case IEEE80211_IF_TYPE_MNTR:
355                 local->monitors--;
356                 if (local->monitors == 0) {
357                         netif_tx_lock_bh(local->mdev);
358                         ieee80211_configure_filter(local);
359                         netif_tx_unlock_bh(local->mdev);
360
361                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
362                 }
363                 break;
364         case IEEE80211_IF_TYPE_STA:
365         case IEEE80211_IF_TYPE_IBSS:
366                 sdata->u.sta.state = IEEE80211_DISABLED;
367                 del_timer_sync(&sdata->u.sta.timer);
368                 /*
369                  * When we get here, the interface is marked down.
370                  * Call synchronize_rcu() to wait for the RX path
371                  * should it be using the interface and enqueuing
372                  * frames at this very time on another CPU.
373                  */
374                 synchronize_rcu();
375                 skb_queue_purge(&sdata->u.sta.skb_queue);
376
377                 if (local->scan_dev == sdata->dev) {
378                         if (!local->ops->hw_scan) {
379                                 local->sta_sw_scanning = 0;
380                                 cancel_delayed_work(&local->scan_work);
381                         } else
382                                 local->sta_hw_scanning = 0;
383                 }
384
385                 flush_workqueue(local->hw.workqueue);
386
387                 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
388                 kfree(sdata->u.sta.extra_ie);
389                 sdata->u.sta.extra_ie = NULL;
390                 sdata->u.sta.extra_ie_len = 0;
391                 /* fall through */
392         default:
393                 conf.vif = &sdata->vif;
394                 conf.type = sdata->vif.type;
395                 conf.mac_addr = dev->dev_addr;
396                 /* disable all keys for as long as this netdev is down */
397                 ieee80211_disable_keys(sdata);
398                 local->ops->remove_interface(local_to_hw(local), &conf);
399         }
400
401         if (local->open_count == 0) {
402                 if (netif_running(local->mdev))
403                         dev_close(local->mdev);
404
405                 if (local->ops->stop)
406                         local->ops->stop(local_to_hw(local));
407
408                 ieee80211_led_radio(local, 0);
409
410                 tasklet_disable(&local->tx_pending_tasklet);
411                 tasklet_disable(&local->tasklet);
412         }
413
414         return 0;
415 }
416
417 static void ieee80211_set_multicast_list(struct net_device *dev)
418 {
419         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
420         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
421         int allmulti, promisc, sdata_allmulti, sdata_promisc;
422
423         allmulti = !!(dev->flags & IFF_ALLMULTI);
424         promisc = !!(dev->flags & IFF_PROMISC);
425         sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
426         sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
427
428         if (allmulti != sdata_allmulti) {
429                 if (dev->flags & IFF_ALLMULTI)
430                         atomic_inc(&local->iff_allmultis);
431                 else
432                         atomic_dec(&local->iff_allmultis);
433                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
434         }
435
436         if (promisc != sdata_promisc) {
437                 if (dev->flags & IFF_PROMISC)
438                         atomic_inc(&local->iff_promiscs);
439                 else
440                         atomic_dec(&local->iff_promiscs);
441                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
442         }
443
444         dev_mc_sync(local->mdev, dev);
445 }
446
447 static const struct header_ops ieee80211_header_ops = {
448         .create         = eth_header,
449         .parse          = header_parse_80211,
450         .rebuild        = eth_rebuild_header,
451         .cache          = eth_header_cache,
452         .cache_update   = eth_header_cache_update,
453 };
454
455 /* Must not be called for mdev */
456 void ieee80211_if_setup(struct net_device *dev)
457 {
458         ether_setup(dev);
459         dev->hard_start_xmit = ieee80211_subif_start_xmit;
460         dev->wireless_handlers = &ieee80211_iw_handler_def;
461         dev->set_multicast_list = ieee80211_set_multicast_list;
462         dev->change_mtu = ieee80211_change_mtu;
463         dev->open = ieee80211_open;
464         dev->stop = ieee80211_stop;
465         dev->destructor = ieee80211_if_free;
466 }
467
468 /* WDS specialties */
469
470 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
471 {
472         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
473         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
474         struct sta_info *sta;
475         DECLARE_MAC_BUF(mac);
476
477         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
478                 return 0;
479
480         /* Create STA entry for the new peer */
481         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
482         if (!sta)
483                 return -ENOMEM;
484         sta_info_put(sta);
485
486         /* Remove STA entry for the old peer */
487         sta = sta_info_get(local, sdata->u.wds.remote_addr);
488         if (sta) {
489                 sta_info_free(sta);
490                 sta_info_put(sta);
491         } else {
492                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
493                        "peer %s\n",
494                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
495         }
496
497         /* Update WDS link data */
498         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
499
500         return 0;
501 }
502
503 /* everything else */
504
505 static int __ieee80211_if_config(struct net_device *dev,
506                                  struct sk_buff *beacon,
507                                  struct ieee80211_tx_control *control)
508 {
509         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
510         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
511         struct ieee80211_if_conf conf;
512
513         if (!local->ops->config_interface || !netif_running(dev))
514                 return 0;
515
516         memset(&conf, 0, sizeof(conf));
517         conf.type = sdata->vif.type;
518         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
519             sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
520                 conf.bssid = sdata->u.sta.bssid;
521                 conf.ssid = sdata->u.sta.ssid;
522                 conf.ssid_len = sdata->u.sta.ssid_len;
523         } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
524                 conf.ssid = sdata->u.ap.ssid;
525                 conf.ssid_len = sdata->u.ap.ssid_len;
526                 conf.beacon = beacon;
527                 conf.beacon_control = control;
528         }
529         return local->ops->config_interface(local_to_hw(local),
530                                             &sdata->vif, &conf);
531 }
532
533 int ieee80211_if_config(struct net_device *dev)
534 {
535         return __ieee80211_if_config(dev, NULL, NULL);
536 }
537
538 int ieee80211_if_config_beacon(struct net_device *dev)
539 {
540         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
541         struct ieee80211_tx_control control;
542         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
543         struct sk_buff *skb;
544
545         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
546                 return 0;
547         skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
548                                    &control);
549         if (!skb)
550                 return -ENOMEM;
551         return __ieee80211_if_config(dev, skb, &control);
552 }
553
554 int ieee80211_hw_config(struct ieee80211_local *local)
555 {
556         struct ieee80211_hw_mode *mode;
557         struct ieee80211_channel *chan;
558         int ret = 0;
559
560         if (local->sta_sw_scanning) {
561                 chan = local->scan_channel;
562                 mode = local->scan_hw_mode;
563         } else {
564                 chan = local->oper_channel;
565                 mode = local->oper_hw_mode;
566         }
567
568         local->hw.conf.channel = chan->chan;
569         local->hw.conf.channel_val = chan->val;
570         if (!local->hw.conf.power_level) {
571                 local->hw.conf.power_level = chan->power_level;
572         } else {
573                 local->hw.conf.power_level = min(chan->power_level,
574                                                  local->hw.conf.power_level);
575         }
576         local->hw.conf.freq = chan->freq;
577         local->hw.conf.phymode = mode->mode;
578         local->hw.conf.antenna_max = chan->antenna_max;
579         local->hw.conf.chan = chan;
580         local->hw.conf.mode = mode;
581
582 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
583         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
584                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
585                local->hw.conf.phymode);
586 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
587
588         if (local->open_count)
589                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
590
591         return ret;
592 }
593
594 /**
595  * ieee80211_hw_config_ht should be used only after legacy configuration
596  * has been determined, as ht configuration depends upon the hardware's
597  * HT abilities for a _specific_ band.
598  */
599 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
600                            struct ieee80211_ht_info *req_ht_cap,
601                            struct ieee80211_ht_bss_info *req_bss_cap)
602 {
603         struct ieee80211_conf *conf = &local->hw.conf;
604         struct ieee80211_hw_mode *mode = conf->mode;
605         int i;
606
607         /* HT is not supported */
608         if (!mode->ht_info.ht_supported) {
609                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
610                 return -EOPNOTSUPP;
611         }
612
613         /* disable HT */
614         if (!enable_ht) {
615                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
616         } else {
617                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
618                 conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap;
619                 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
620                 conf->ht_conf.cap |=
621                         mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
622                 conf->ht_bss_conf.primary_channel =
623                         req_bss_cap->primary_channel;
624                 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
625                 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
626                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
627                         conf->ht_conf.supp_mcs_set[i] =
628                                 mode->ht_info.supp_mcs_set[i] &
629                                   req_ht_cap->supp_mcs_set[i];
630
631                 /* In STA mode, this gives us indication
632                  * to the AP's mode of operation */
633                 conf->ht_conf.ht_supported = 1;
634                 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
635                 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
636         }
637
638         local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
639
640         return 0;
641 }
642
643 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
644                                       u32 changed)
645 {
646         struct ieee80211_local *local = sdata->local;
647
648         if (!changed)
649                 return;
650
651         if (local->ops->bss_info_changed)
652                 local->ops->bss_info_changed(local_to_hw(local),
653                                              &sdata->vif,
654                                              &sdata->bss_conf,
655                                              changed);
656 }
657
658 void ieee80211_reset_erp_info(struct net_device *dev)
659 {
660         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
661
662         sdata->bss_conf.use_cts_prot = 0;
663         sdata->bss_conf.use_short_preamble = 0;
664         ieee80211_bss_info_change_notify(sdata,
665                                          BSS_CHANGED_ERP_CTS_PROT |
666                                          BSS_CHANGED_ERP_PREAMBLE);
667 }
668
669 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
670                                  struct sk_buff *skb,
671                                  struct ieee80211_tx_status *status)
672 {
673         struct ieee80211_local *local = hw_to_local(hw);
674         struct ieee80211_tx_status *saved;
675         int tmp;
676
677         skb->dev = local->mdev;
678         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
679         if (unlikely(!saved)) {
680                 if (net_ratelimit())
681                         printk(KERN_WARNING "%s: Not enough memory, "
682                                "dropping tx status", skb->dev->name);
683                 /* should be dev_kfree_skb_irq, but due to this function being
684                  * named _irqsafe instead of just _irq we can't be sure that
685                  * people won't call it from non-irq contexts */
686                 dev_kfree_skb_any(skb);
687                 return;
688         }
689         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
690         /* copy pointer to saved status into skb->cb for use by tasklet */
691         memcpy(skb->cb, &saved, sizeof(saved));
692
693         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
694         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
695                        &local->skb_queue : &local->skb_queue_unreliable, skb);
696         tmp = skb_queue_len(&local->skb_queue) +
697                 skb_queue_len(&local->skb_queue_unreliable);
698         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
699                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
700                 memcpy(&saved, skb->cb, sizeof(saved));
701                 kfree(saved);
702                 dev_kfree_skb_irq(skb);
703                 tmp--;
704                 I802_DEBUG_INC(local->tx_status_drop);
705         }
706         tasklet_schedule(&local->tasklet);
707 }
708 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
709
710 static void ieee80211_tasklet_handler(unsigned long data)
711 {
712         struct ieee80211_local *local = (struct ieee80211_local *) data;
713         struct sk_buff *skb;
714         struct ieee80211_rx_status rx_status;
715         struct ieee80211_tx_status *tx_status;
716
717         while ((skb = skb_dequeue(&local->skb_queue)) ||
718                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
719                 switch (skb->pkt_type) {
720                 case IEEE80211_RX_MSG:
721                         /* status is in skb->cb */
722                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
723                         /* Clear skb->pkt_type in order to not confuse kernel
724                          * netstack. */
725                         skb->pkt_type = 0;
726                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
727                         break;
728                 case IEEE80211_TX_STATUS_MSG:
729                         /* get pointer to saved status out of skb->cb */
730                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
731                         skb->pkt_type = 0;
732                         ieee80211_tx_status(local_to_hw(local),
733                                             skb, tx_status);
734                         kfree(tx_status);
735                         break;
736                 default: /* should never get here! */
737                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
738                                wiphy_name(local->hw.wiphy), skb->pkt_type);
739                         dev_kfree_skb(skb);
740                         break;
741                 }
742         }
743 }
744
745 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
746  * make a prepared TX frame (one that has been given to hw) to look like brand
747  * new IEEE 802.11 frame that is ready to go through TX processing again.
748  * Also, tx_packet_data in cb is restored from tx_control. */
749 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
750                                       struct ieee80211_key *key,
751                                       struct sk_buff *skb,
752                                       struct ieee80211_tx_control *control)
753 {
754         int hdrlen, iv_len, mic_len;
755         struct ieee80211_tx_packet_data *pkt_data;
756
757         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
758         pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
759         pkt_data->flags = 0;
760         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
761                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
762         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
763                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
764         if (control->flags & IEEE80211_TXCTL_REQUEUE)
765                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
766         if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
767                 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
768         pkt_data->queue = control->queue;
769
770         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
771
772         if (!key)
773                 goto no_key;
774
775         switch (key->conf.alg) {
776         case ALG_WEP:
777                 iv_len = WEP_IV_LEN;
778                 mic_len = WEP_ICV_LEN;
779                 break;
780         case ALG_TKIP:
781                 iv_len = TKIP_IV_LEN;
782                 mic_len = TKIP_ICV_LEN;
783                 break;
784         case ALG_CCMP:
785                 iv_len = CCMP_HDR_LEN;
786                 mic_len = CCMP_MIC_LEN;
787                 break;
788         default:
789                 goto no_key;
790         }
791
792         if (skb->len >= mic_len &&
793             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
794                 skb_trim(skb, skb->len - mic_len);
795         if (skb->len >= iv_len && skb->len > hdrlen) {
796                 memmove(skb->data + iv_len, skb->data, hdrlen);
797                 skb_pull(skb, iv_len);
798         }
799
800 no_key:
801         {
802                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
803                 u16 fc = le16_to_cpu(hdr->frame_control);
804                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
805                         fc &= ~IEEE80211_STYPE_QOS_DATA;
806                         hdr->frame_control = cpu_to_le16(fc);
807                         memmove(skb->data + 2, skb->data, hdrlen - 2);
808                         skb_pull(skb, 2);
809                 }
810         }
811 }
812
813 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
814                          struct ieee80211_tx_status *status)
815 {
816         struct sk_buff *skb2;
817         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
818         struct ieee80211_local *local = hw_to_local(hw);
819         u16 frag, type;
820         struct ieee80211_tx_status_rtap_hdr *rthdr;
821         struct ieee80211_sub_if_data *sdata;
822         int monitors;
823
824         if (!status) {
825                 printk(KERN_ERR
826                        "%s: ieee80211_tx_status called with NULL status\n",
827                        wiphy_name(local->hw.wiphy));
828                 dev_kfree_skb(skb);
829                 return;
830         }
831
832         if (status->excessive_retries) {
833                 struct sta_info *sta;
834                 sta = sta_info_get(local, hdr->addr1);
835                 if (sta) {
836                         if (sta->flags & WLAN_STA_PS) {
837                                 /* The STA is in power save mode, so assume
838                                  * that this TX packet failed because of that.
839                                  */
840                                 status->excessive_retries = 0;
841                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
842                         }
843                         sta_info_put(sta);
844                 }
845         }
846
847         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
848                 struct sta_info *sta;
849                 sta = sta_info_get(local, hdr->addr1);
850                 if (sta) {
851                         sta->tx_filtered_count++;
852
853                         /* Clear the TX filter mask for this STA when sending
854                          * the next packet. If the STA went to power save mode,
855                          * this will happen when it is waking up for the next
856                          * time. */
857                         sta->clear_dst_mask = 1;
858
859                         /* TODO: Is the WLAN_STA_PS flag always set here or is
860                          * the race between RX and TX status causing some
861                          * packets to be filtered out before 80211.o gets an
862                          * update for PS status? This seems to be the case, so
863                          * no changes are likely to be needed. */
864                         if (sta->flags & WLAN_STA_PS &&
865                             skb_queue_len(&sta->tx_filtered) <
866                             STA_MAX_TX_BUFFER) {
867                                 ieee80211_remove_tx_extra(local, sta->key,
868                                                           skb,
869                                                           &status->control);
870                                 skb_queue_tail(&sta->tx_filtered, skb);
871                         } else if (!(sta->flags & WLAN_STA_PS) &&
872                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
873                                 /* Software retry the packet once */
874                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
875                                 ieee80211_remove_tx_extra(local, sta->key,
876                                                           skb,
877                                                           &status->control);
878                                 dev_queue_xmit(skb);
879                         } else {
880                                 if (net_ratelimit()) {
881                                         printk(KERN_DEBUG "%s: dropped TX "
882                                                "filtered frame queue_len=%d "
883                                                "PS=%d @%lu\n",
884                                                wiphy_name(local->hw.wiphy),
885                                                skb_queue_len(
886                                                        &sta->tx_filtered),
887                                                !!(sta->flags & WLAN_STA_PS),
888                                                jiffies);
889                                 }
890                                 dev_kfree_skb(skb);
891                         }
892                         sta_info_put(sta);
893                         return;
894                 }
895         } else
896                 rate_control_tx_status(local->mdev, skb, status);
897
898         ieee80211_led_tx(local, 0);
899
900         /* SNMP counters
901          * Fragments are passed to low-level drivers as separate skbs, so these
902          * are actually fragments, not frames. Update frame counters only for
903          * the first fragment of the frame. */
904
905         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
906         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
907
908         if (status->flags & IEEE80211_TX_STATUS_ACK) {
909                 if (frag == 0) {
910                         local->dot11TransmittedFrameCount++;
911                         if (is_multicast_ether_addr(hdr->addr1))
912                                 local->dot11MulticastTransmittedFrameCount++;
913                         if (status->retry_count > 0)
914                                 local->dot11RetryCount++;
915                         if (status->retry_count > 1)
916                                 local->dot11MultipleRetryCount++;
917                 }
918
919                 /* This counter shall be incremented for an acknowledged MPDU
920                  * with an individual address in the address 1 field or an MPDU
921                  * with a multicast address in the address 1 field of type Data
922                  * or Management. */
923                 if (!is_multicast_ether_addr(hdr->addr1) ||
924                     type == IEEE80211_FTYPE_DATA ||
925                     type == IEEE80211_FTYPE_MGMT)
926                         local->dot11TransmittedFragmentCount++;
927         } else {
928                 if (frag == 0)
929                         local->dot11FailedCount++;
930         }
931
932         /* this was a transmitted frame, but now we want to reuse it */
933         skb_orphan(skb);
934
935         if (!local->monitors) {
936                 dev_kfree_skb(skb);
937                 return;
938         }
939
940         /* send frame to monitor interfaces now */
941
942         if (skb_headroom(skb) < sizeof(*rthdr)) {
943                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
944                 dev_kfree_skb(skb);
945                 return;
946         }
947
948         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
949                                 skb_push(skb, sizeof(*rthdr));
950
951         memset(rthdr, 0, sizeof(*rthdr));
952         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
953         rthdr->hdr.it_present =
954                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
955                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
956
957         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
958             !is_multicast_ether_addr(hdr->addr1))
959                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
960
961         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
962             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
963                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
964         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
965                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
966
967         rthdr->data_retries = status->retry_count;
968
969         rcu_read_lock();
970         monitors = local->monitors;
971         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
972                 /*
973                  * Using the monitors counter is possibly racy, but
974                  * if the value is wrong we simply either clone the skb
975                  * once too much or forget sending it to one monitor iface
976                  * The latter case isn't nice but fixing the race is much
977                  * more complicated.
978                  */
979                 if (!monitors || !skb)
980                         goto out;
981
982                 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
983                         if (!netif_running(sdata->dev))
984                                 continue;
985                         monitors--;
986                         if (monitors)
987                                 skb2 = skb_clone(skb, GFP_ATOMIC);
988                         else
989                                 skb2 = NULL;
990                         skb->dev = sdata->dev;
991                         /* XXX: is this sufficient for BPF? */
992                         skb_set_mac_header(skb, 0);
993                         skb->ip_summed = CHECKSUM_UNNECESSARY;
994                         skb->pkt_type = PACKET_OTHERHOST;
995                         skb->protocol = htons(ETH_P_802_2);
996                         memset(skb->cb, 0, sizeof(skb->cb));
997                         netif_rx(skb);
998                         skb = skb2;
999                 }
1000         }
1001  out:
1002         rcu_read_unlock();
1003         if (skb)
1004                 dev_kfree_skb(skb);
1005 }
1006 EXPORT_SYMBOL(ieee80211_tx_status);
1007
1008 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1009                                         const struct ieee80211_ops *ops)
1010 {
1011         struct net_device *mdev;
1012         struct ieee80211_local *local;
1013         struct ieee80211_sub_if_data *sdata;
1014         int priv_size;
1015         struct wiphy *wiphy;
1016
1017         /* Ensure 32-byte alignment of our private data and hw private data.
1018          * We use the wiphy priv data for both our ieee80211_local and for
1019          * the driver's private data
1020          *
1021          * In memory it'll be like this:
1022          *
1023          * +-------------------------+
1024          * | struct wiphy           |
1025          * +-------------------------+
1026          * | struct ieee80211_local  |
1027          * +-------------------------+
1028          * | driver's private data   |
1029          * +-------------------------+
1030          *
1031          */
1032         priv_size = ((sizeof(struct ieee80211_local) +
1033                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1034                     priv_data_len;
1035
1036         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1037
1038         if (!wiphy)
1039                 return NULL;
1040
1041         wiphy->privid = mac80211_wiphy_privid;
1042
1043         local = wiphy_priv(wiphy);
1044         local->hw.wiphy = wiphy;
1045
1046         local->hw.priv = (char *)local +
1047                          ((sizeof(struct ieee80211_local) +
1048                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1049
1050         BUG_ON(!ops->tx);
1051         BUG_ON(!ops->start);
1052         BUG_ON(!ops->stop);
1053         BUG_ON(!ops->config);
1054         BUG_ON(!ops->add_interface);
1055         BUG_ON(!ops->remove_interface);
1056         BUG_ON(!ops->configure_filter);
1057         local->ops = ops;
1058
1059         /* for now, mdev needs sub_if_data :/ */
1060         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1061                             "wmaster%d", ether_setup);
1062         if (!mdev) {
1063                 wiphy_free(wiphy);
1064                 return NULL;
1065         }
1066
1067         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1068         mdev->ieee80211_ptr = &sdata->wdev;
1069         sdata->wdev.wiphy = wiphy;
1070
1071         local->hw.queues = 1; /* default */
1072
1073         local->mdev = mdev;
1074         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1075         local->rx_handlers = ieee80211_rx_handlers;
1076         local->tx_handlers = ieee80211_tx_handlers;
1077
1078         local->bridge_packets = 1;
1079
1080         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1081         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1082         local->short_retry_limit = 7;
1083         local->long_retry_limit = 4;
1084         local->hw.conf.radio_enabled = 1;
1085
1086         local->enabled_modes = ~0;
1087
1088         INIT_LIST_HEAD(&local->modes_list);
1089
1090         INIT_LIST_HEAD(&local->interfaces);
1091
1092         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1093         ieee80211_rx_bss_list_init(mdev);
1094
1095         sta_info_init(local);
1096
1097         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1098         mdev->open = ieee80211_master_open;
1099         mdev->stop = ieee80211_master_stop;
1100         mdev->type = ARPHRD_IEEE80211;
1101         mdev->header_ops = &ieee80211_header_ops;
1102         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1103
1104         sdata->vif.type = IEEE80211_IF_TYPE_AP;
1105         sdata->dev = mdev;
1106         sdata->local = local;
1107         sdata->u.ap.force_unicast_rateidx = -1;
1108         sdata->u.ap.max_ratectrl_rateidx = -1;
1109         ieee80211_if_sdata_init(sdata);
1110         /* no RCU needed since we're still during init phase */
1111         list_add_tail(&sdata->list, &local->interfaces);
1112
1113         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1114                      (unsigned long)local);
1115         tasklet_disable(&local->tx_pending_tasklet);
1116
1117         tasklet_init(&local->tasklet,
1118                      ieee80211_tasklet_handler,
1119                      (unsigned long) local);
1120         tasklet_disable(&local->tasklet);
1121
1122         skb_queue_head_init(&local->skb_queue);
1123         skb_queue_head_init(&local->skb_queue_unreliable);
1124
1125         return local_to_hw(local);
1126 }
1127 EXPORT_SYMBOL(ieee80211_alloc_hw);
1128
1129 int ieee80211_register_hw(struct ieee80211_hw *hw)
1130 {
1131         struct ieee80211_local *local = hw_to_local(hw);
1132         const char *name;
1133         int result;
1134
1135         result = wiphy_register(local->hw.wiphy);
1136         if (result < 0)
1137                 return result;
1138
1139         name = wiphy_dev(local->hw.wiphy)->driver->name;
1140         local->hw.workqueue = create_singlethread_workqueue(name);
1141         if (!local->hw.workqueue) {
1142                 result = -ENOMEM;
1143                 goto fail_workqueue;
1144         }
1145
1146         /*
1147          * The hardware needs headroom for sending the frame,
1148          * and we need some headroom for passing the frame to monitor
1149          * interfaces, but never both at the same time.
1150          */
1151         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1152                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1153
1154         debugfs_hw_add(local);
1155
1156         local->hw.conf.beacon_int = 1000;
1157
1158         local->wstats_flags |= local->hw.max_rssi ?
1159                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1160         local->wstats_flags |= local->hw.max_signal ?
1161                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1162         local->wstats_flags |= local->hw.max_noise ?
1163                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1164         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1165                 local->wstats_flags |= IW_QUAL_DBM;
1166
1167         result = sta_info_start(local);
1168         if (result < 0)
1169                 goto fail_sta_info;
1170
1171         rtnl_lock();
1172         result = dev_alloc_name(local->mdev, local->mdev->name);
1173         if (result < 0)
1174                 goto fail_dev;
1175
1176         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1177         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1178
1179         result = register_netdevice(local->mdev);
1180         if (result < 0)
1181                 goto fail_dev;
1182
1183         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1184         ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1185
1186         result = ieee80211_init_rate_ctrl_alg(local,
1187                                               hw->rate_control_algorithm);
1188         if (result < 0) {
1189                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1190                        "algorithm\n", wiphy_name(local->hw.wiphy));
1191                 goto fail_rate;
1192         }
1193
1194         result = ieee80211_wep_init(local);
1195
1196         if (result < 0) {
1197                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1198                        wiphy_name(local->hw.wiphy));
1199                 goto fail_wep;
1200         }
1201
1202         ieee80211_install_qdisc(local->mdev);
1203
1204         /* add one default STA interface */
1205         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1206                                   IEEE80211_IF_TYPE_STA);
1207         if (result)
1208                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1209                        wiphy_name(local->hw.wiphy));
1210
1211         local->reg_state = IEEE80211_DEV_REGISTERED;
1212         rtnl_unlock();
1213
1214         ieee80211_led_init(local);
1215
1216         return 0;
1217
1218 fail_wep:
1219         rate_control_deinitialize(local);
1220 fail_rate:
1221         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1222         unregister_netdevice(local->mdev);
1223 fail_dev:
1224         rtnl_unlock();
1225         sta_info_stop(local);
1226 fail_sta_info:
1227         debugfs_hw_del(local);
1228         destroy_workqueue(local->hw.workqueue);
1229 fail_workqueue:
1230         wiphy_unregister(local->hw.wiphy);
1231         return result;
1232 }
1233 EXPORT_SYMBOL(ieee80211_register_hw);
1234
1235 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1236                               struct ieee80211_hw_mode *mode)
1237 {
1238         struct ieee80211_local *local = hw_to_local(hw);
1239         struct ieee80211_rate *rate;
1240         int i;
1241
1242         INIT_LIST_HEAD(&mode->list);
1243         list_add_tail(&mode->list, &local->modes_list);
1244
1245         local->hw_modes |= (1 << mode->mode);
1246         for (i = 0; i < mode->num_rates; i++) {
1247                 rate = &(mode->rates[i]);
1248                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1249         }
1250         ieee80211_prepare_rates(local, mode);
1251
1252         if (!local->oper_hw_mode) {
1253                 /* Default to this mode */
1254                 local->hw.conf.phymode = mode->mode;
1255                 local->oper_hw_mode = local->scan_hw_mode = mode;
1256                 local->oper_channel = local->scan_channel = &mode->channels[0];
1257                 local->hw.conf.mode = local->oper_hw_mode;
1258                 local->hw.conf.chan = local->oper_channel;
1259         }
1260
1261         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1262                 ieee80211_set_default_regdomain(mode);
1263
1264         return 0;
1265 }
1266 EXPORT_SYMBOL(ieee80211_register_hwmode);
1267
1268 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1269 {
1270         struct ieee80211_local *local = hw_to_local(hw);
1271         struct ieee80211_sub_if_data *sdata, *tmp;
1272         int i;
1273
1274         tasklet_kill(&local->tx_pending_tasklet);
1275         tasklet_kill(&local->tasklet);
1276
1277         rtnl_lock();
1278
1279         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1280
1281         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1282
1283         /*
1284          * At this point, interface list manipulations are fine
1285          * because the driver cannot be handing us frames any
1286          * more and the tasklet is killed.
1287          */
1288
1289         /*
1290          * First, we remove all non-master interfaces. Do this because they
1291          * may have bss pointer dependency on the master, and when we free
1292          * the master these would be freed as well, breaking our list
1293          * iteration completely.
1294          */
1295         list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1296                 if (sdata->dev == local->mdev)
1297                         continue;
1298                 list_del(&sdata->list);
1299                 __ieee80211_if_del(local, sdata);
1300         }
1301
1302         /* then, finally, remove the master interface */
1303         __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1304
1305         rtnl_unlock();
1306
1307         ieee80211_rx_bss_list_deinit(local->mdev);
1308         ieee80211_clear_tx_pending(local);
1309         sta_info_stop(local);
1310         rate_control_deinitialize(local);
1311         debugfs_hw_del(local);
1312
1313         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1314                 kfree(local->supp_rates[i]);
1315                 kfree(local->basic_rates[i]);
1316         }
1317
1318         if (skb_queue_len(&local->skb_queue)
1319                         || skb_queue_len(&local->skb_queue_unreliable))
1320                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1321                        wiphy_name(local->hw.wiphy));
1322         skb_queue_purge(&local->skb_queue);
1323         skb_queue_purge(&local->skb_queue_unreliable);
1324
1325         destroy_workqueue(local->hw.workqueue);
1326         wiphy_unregister(local->hw.wiphy);
1327         ieee80211_wep_free(local);
1328         ieee80211_led_exit(local);
1329 }
1330 EXPORT_SYMBOL(ieee80211_unregister_hw);
1331
1332 void ieee80211_free_hw(struct ieee80211_hw *hw)
1333 {
1334         struct ieee80211_local *local = hw_to_local(hw);
1335
1336         ieee80211_if_free(local->mdev);
1337         wiphy_free(local->hw.wiphy);
1338 }
1339 EXPORT_SYMBOL(ieee80211_free_hw);
1340
1341 static int __init ieee80211_init(void)
1342 {
1343         struct sk_buff *skb;
1344         int ret;
1345
1346         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1347
1348         ret = rc80211_simple_init();
1349         if (ret)
1350                 goto out;
1351
1352         ret = rc80211_pid_init();
1353         if (ret)
1354                 goto out_cleanup_simple;
1355
1356         ret = ieee80211_wme_register();
1357         if (ret) {
1358                 printk(KERN_DEBUG "ieee80211_init: failed to "
1359                        "initialize WME (err=%d)\n", ret);
1360                 goto out_cleanup_pid;
1361         }
1362
1363         ieee80211_debugfs_netdev_init();
1364         ieee80211_regdomain_init();
1365
1366         return 0;
1367
1368  out_cleanup_pid:
1369         rc80211_pid_exit();
1370  out_cleanup_simple:
1371         rc80211_simple_exit();
1372  out:
1373         return ret;
1374 }
1375
1376 static void __exit ieee80211_exit(void)
1377 {
1378         rc80211_simple_exit();
1379         rc80211_pid_exit();
1380
1381         ieee80211_wme_unregister();
1382         ieee80211_debugfs_netdev_exit();
1383 }
1384
1385
1386 subsys_initcall(ieee80211_init);
1387 module_exit(ieee80211_exit);
1388
1389 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1390 MODULE_LICENSE("GPL");