?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[NETFILTER]: nf_conntrack_sip: kill request URI "header" definitions
[linux-2.6.git] / net / mac80211 / ieee80211.c
blob616ce10d2a3861a0fc40441bd9d95a711fd42db9
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 "mesh.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "ieee80211_led.h"
34 #include "cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 #define SUPP_MCS_SET_LEN 16
39
40 /*
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
43 */
44 struct ieee80211_tx_status_rtap_hdr {
45 struct ieee80211_radiotap_header hdr;
46 __le16 tx_flags;
47 u8 data_retries;
48 } __attribute__ ((packed));
49
50 /* common interface routines */
51
52 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
53 {
54 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
55 return ETH_ALEN;
56 }
57
58 /* must be called under mdev tx lock */
59 static void ieee80211_configure_filter(struct ieee80211_local *local)
60 {
61 unsigned int changed_flags;
62 unsigned int new_flags = 0;
63
64 if (atomic_read(&local->iff_promiscs))
65 new_flags |= FIF_PROMISC_IN_BSS;
66
67 if (atomic_read(&local->iff_allmultis))
68 new_flags |= FIF_ALLMULTI;
69
70 if (local->monitors)
71 new_flags |= FIF_BCN_PRBRESP_PROMISC;
72
73 if (local->fif_fcsfail)
74 new_flags |= FIF_FCSFAIL;
75
76 if (local->fif_plcpfail)
77 new_flags |= FIF_PLCPFAIL;
78
79 if (local->fif_control)
80 new_flags |= FIF_CONTROL;
81
82 if (local->fif_other_bss)
83 new_flags |= FIF_OTHER_BSS;
84
85 changed_flags = local->filter_flags ^ new_flags;
86
87 /* be a bit nasty */
88 new_flags |= (1<<31);
89
90 local->ops->configure_filter(local_to_hw(local),
91 changed_flags, &new_flags,
92 local->mdev->mc_count,
93 local->mdev->mc_list);
94
95 WARN_ON(new_flags & (1<<31));
96
97 local->filter_flags = new_flags & ~(1<<31);
98 }
99
100 /* master interface */
101
102 static int ieee80211_master_open(struct net_device *dev)
103 {
104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
105 struct ieee80211_sub_if_data *sdata;
106 int res = -EOPNOTSUPP;
107
108 /* we hold the RTNL here so can safely walk the list */
109 list_for_each_entry(sdata, &local->interfaces, list) {
110 if (sdata->dev != dev && netif_running(sdata->dev)) {
111 res = 0;
112 break;
113 }
114 }
115 return res;
116 }
117
118 static int ieee80211_master_stop(struct net_device *dev)
119 {
120 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
121 struct ieee80211_sub_if_data *sdata;
122
123 /* we hold the RTNL here so can safely walk the list */
124 list_for_each_entry(sdata, &local->interfaces, list)
125 if (sdata->dev != dev && netif_running(sdata->dev))
126 dev_close(sdata->dev);
127
128 return 0;
129 }
130
131 static void ieee80211_master_set_multicast_list(struct net_device *dev)
132 {
133 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
134
135 ieee80211_configure_filter(local);
136 }
137
138 /* regular interfaces */
139
140 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
141 {
142 int meshhdrlen;
143 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
144
145 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
146
147 /* FIX: what would be proper limits for MTU?
148 * This interface uses 802.3 frames. */
149 if (new_mtu < 256 ||
150 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
151 printk(KERN_WARNING "%s: invalid MTU %d\n",
152 dev->name, new_mtu);
153 return -EINVAL;
154 }
155
156 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
157 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
158 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
159 dev->mtu = new_mtu;
160 return 0;
161 }
162
163 static inline int identical_mac_addr_allowed(int type1, int type2)
164 {
165 return (type1 == IEEE80211_IF_TYPE_MNTR ||
166 type2 == IEEE80211_IF_TYPE_MNTR ||
167 (type1 == IEEE80211_IF_TYPE_AP &&
168 type2 == IEEE80211_IF_TYPE_WDS) ||
169 (type1 == IEEE80211_IF_TYPE_WDS &&
170 (type2 == IEEE80211_IF_TYPE_WDS ||
171 type2 == IEEE80211_IF_TYPE_AP)) ||
172 (type1 == IEEE80211_IF_TYPE_AP &&
173 type2 == IEEE80211_IF_TYPE_VLAN) ||
174 (type1 == IEEE80211_IF_TYPE_VLAN &&
175 (type2 == IEEE80211_IF_TYPE_AP ||
176 type2 == IEEE80211_IF_TYPE_VLAN)));
177 }
178
179 static int ieee80211_open(struct net_device *dev)
180 {
181 struct ieee80211_sub_if_data *sdata, *nsdata;
182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
183 struct ieee80211_if_init_conf conf;
184 int res;
185 bool need_hw_reconfig = 0;
186 struct sta_info *sta;
187
188 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
189
190 /* we hold the RTNL here so can safely walk the list */
191 list_for_each_entry(nsdata, &local->interfaces, list) {
192 struct net_device *ndev = nsdata->dev;
193
194 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
195 /*
196 * Allow only a single IBSS interface to be up at any
197 * time. This is restricted because beacon distribution
198 * cannot work properly if both are in the same IBSS.
199 *
200 * To remove this restriction we'd have to disallow them
201 * from setting the same SSID on different IBSS interfaces
202 * belonging to the same hardware. Then, however, we're
203 * faced with having to adopt two different TSF timers...
204 */
205 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
206 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
207 return -EBUSY;
208
209 /*
210 * Disallow multiple IBSS/STA mode interfaces.
211 *
212 * This is a technical restriction, it is possible although
213 * most likely not IEEE 802.11 compliant to have multiple
214 * STAs with just a single hardware (the TSF timer will not
215 * be adjusted properly.)
216 *
217 * However, because mac80211 uses the master device's BSS
218 * information for each STA/IBSS interface, doing this will
219 * currently corrupt that BSS information completely, unless,
220 * a not very useful case, both STAs are associated to the
221 * same BSS.
222 *
223 * To remove this restriction, the BSS information needs to
224 * be embedded in the STA/IBSS mode sdata instead of using
225 * the master device's BSS structure.
226 */
227 if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
228 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
229 (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
230 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
231 return -EBUSY;
232
233 /*
234 * The remaining checks are only performed for interfaces
235 * with the same MAC address.
236 */
237 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
238 continue;
239
240 /*
241 * check whether it may have the same address
242 */
243 if (!identical_mac_addr_allowed(sdata->vif.type,
244 nsdata->vif.type))
245 return -ENOTUNIQ;
246
247 /*
248 * can only add VLANs to enabled APs
249 */
250 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
251 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
252 sdata->u.vlan.ap = nsdata;
253 }
254 }
255
256 switch (sdata->vif.type) {
257 case IEEE80211_IF_TYPE_WDS:
258 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
259 return -ENOLINK;
260
261 /* Create STA entry for the WDS peer */
262 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
263 GFP_KERNEL);
264 if (!sta)
265 return -ENOMEM;
266
267 sta->flags |= WLAN_STA_AUTHORIZED;
268
269 res = sta_info_insert(sta);
270 if (res) {
271 sta_info_destroy(sta);
272 return res;
273 }
274 break;
275 case IEEE80211_IF_TYPE_VLAN:
276 if (!sdata->u.vlan.ap)
277 return -ENOLINK;
278 break;
279 case IEEE80211_IF_TYPE_AP:
280 case IEEE80211_IF_TYPE_STA:
281 case IEEE80211_IF_TYPE_MNTR:
282 case IEEE80211_IF_TYPE_IBSS:
283 case IEEE80211_IF_TYPE_MESH_POINT:
284 /* no special treatment */
285 break;
286 case IEEE80211_IF_TYPE_INVALID:
287 /* cannot happen */
288 WARN_ON(1);
289 break;
290 }
291
292 if (local->open_count == 0) {
293 res = 0;
294 if (local->ops->start)
295 res = local->ops->start(local_to_hw(local));
296 if (res)
297 return res;
298 need_hw_reconfig = 1;
299 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
300 }
301
302 switch (sdata->vif.type) {
303 case IEEE80211_IF_TYPE_VLAN:
304 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
305 /* no need to tell driver */
306 break;
307 case IEEE80211_IF_TYPE_MNTR:
308 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
309 local->cooked_mntrs++;
310 break;
311 }
312
313 /* must be before the call to ieee80211_configure_filter */
314 local->monitors++;
315 if (local->monitors == 1)
316 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
317
318 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
319 local->fif_fcsfail++;
320 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
321 local->fif_plcpfail++;
322 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
323 local->fif_control++;
324 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
325 local->fif_other_bss++;
326
327 netif_tx_lock_bh(local->mdev);
328 ieee80211_configure_filter(local);
329 netif_tx_unlock_bh(local->mdev);
330 break;
331 case IEEE80211_IF_TYPE_STA:
332 case IEEE80211_IF_TYPE_IBSS:
333 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
334 /* fall through */
335 default:
336 conf.vif = &sdata->vif;
337 conf.type = sdata->vif.type;
338 conf.mac_addr = dev->dev_addr;
339 res = local->ops->add_interface(local_to_hw(local), &conf);
340 if (res && !local->open_count && local->ops->stop)
341 local->ops->stop(local_to_hw(local));
342 if (res)
343 return res;
344
345 ieee80211_if_config(dev);
346 ieee80211_reset_erp_info(dev);
347 ieee80211_enable_keys(sdata);
348
349 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
350 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
351 netif_carrier_off(dev);
352 else
353 netif_carrier_on(dev);
354 }
355
356 if (local->open_count == 0) {
357 res = dev_open(local->mdev);
358 WARN_ON(res);
359 tasklet_enable(&local->tx_pending_tasklet);
360 tasklet_enable(&local->tasklet);
361 }
362
363 /*
364 * set_multicast_list will be invoked by the networking core
365 * which will check whether any increments here were done in
366 * error and sync them down to the hardware as filter flags.
367 */
368 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
369 atomic_inc(&local->iff_allmultis);
370
371 if (sdata->flags & IEEE80211_SDATA_PROMISC)
372 atomic_inc(&local->iff_promiscs);
373
374 local->open_count++;
375 if (need_hw_reconfig)
376 ieee80211_hw_config(local);
377
378 netif_start_queue(dev);
379
380 return 0;
381 }
382
383 static int ieee80211_stop(struct net_device *dev)
384 {
385 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
386 struct ieee80211_local *local = sdata->local;
387 struct ieee80211_if_init_conf conf;
388 struct sta_info *sta;
389
390 /*
391 * Stop TX on this interface first.
392 */
393 netif_stop_queue(dev);
394
395 /*
396 * Now delete all active aggregation sessions.
397 */
398 rcu_read_lock();
399
400 list_for_each_entry_rcu(sta, &local->sta_list, list) {
401 if (sta->sdata == sdata)
402 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
403 }
404
405 rcu_read_unlock();
406
407 /*
408 * Remove all stations associated with this interface.
409 *
410 * This must be done before calling ops->remove_interface()
411 * because otherwise we can later invoke ops->sta_notify()
412 * whenever the STAs are removed, and that invalidates driver
413 * assumptions about always getting a vif pointer that is valid
414 * (because if we remove a STA after ops->remove_interface()
415 * the driver will have removed the vif info already!)
416 *
417 * We could relax this and only unlink the stations from the
418 * hash table and list but keep them on a per-sdata list that
419 * will be inserted back again when the interface is brought
420 * up again, but I don't currently see a use case for that,
421 * except with WDS which gets a STA entry created when it is
422 * brought up.
423 */
424 sta_info_flush(local, sdata);
425
426 /*
427 * Don't count this interface for promisc/allmulti while it
428 * is down. dev_mc_unsync() will invoke set_multicast_list
429 * on the master interface which will sync these down to the
430 * hardware as filter flags.
431 */
432 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
433 atomic_dec(&local->iff_allmultis);
434
435 if (sdata->flags & IEEE80211_SDATA_PROMISC)
436 atomic_dec(&local->iff_promiscs);
437
438 dev_mc_unsync(local->mdev, dev);
439
440 /* APs need special treatment */
441 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
442 struct ieee80211_sub_if_data *vlan, *tmp;
443 struct beacon_data *old_beacon = sdata->u.ap.beacon;
444
445 /* remove beacon */
446 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
447 synchronize_rcu();
448 kfree(old_beacon);
449
450 /* down all dependent devices, that is VLANs */
451 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
452 u.vlan.list)
453 dev_close(vlan->dev);
454 WARN_ON(!list_empty(&sdata->u.ap.vlans));
455 }
456
457 local->open_count--;
458
459 switch (sdata->vif.type) {
460 case IEEE80211_IF_TYPE_VLAN:
461 list_del(&sdata->u.vlan.list);
462 sdata->u.vlan.ap = NULL;
463 /* no need to tell driver */
464 break;
465 case IEEE80211_IF_TYPE_MNTR:
466 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
467 local->cooked_mntrs--;
468 break;
469 }
470
471 local->monitors--;
472 if (local->monitors == 0)
473 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
474
475 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
476 local->fif_fcsfail--;
477 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
478 local->fif_plcpfail--;
479 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
480 local->fif_control--;
481 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
482 local->fif_other_bss--;
483
484 netif_tx_lock_bh(local->mdev);
485 ieee80211_configure_filter(local);
486 netif_tx_unlock_bh(local->mdev);
487 break;
488 case IEEE80211_IF_TYPE_MESH_POINT:
489 case IEEE80211_IF_TYPE_STA:
490 case IEEE80211_IF_TYPE_IBSS:
491 sdata->u.sta.state = IEEE80211_DISABLED;
492 del_timer_sync(&sdata->u.sta.timer);
493 /*
494 * When we get here, the interface is marked down.
495 * Call synchronize_rcu() to wait for the RX path
496 * should it be using the interface and enqueuing
497 * frames at this very time on another CPU.
498 */
499 synchronize_rcu();
500 skb_queue_purge(&sdata->u.sta.skb_queue);
501
502 if (local->scan_dev == sdata->dev) {
503 if (!local->ops->hw_scan) {
504 local->sta_sw_scanning = 0;
505 cancel_delayed_work(&local->scan_work);
506 } else
507 local->sta_hw_scanning = 0;
508 }
509
510 flush_workqueue(local->hw.workqueue);
511
512 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
513 kfree(sdata->u.sta.extra_ie);
514 sdata->u.sta.extra_ie = NULL;
515 sdata->u.sta.extra_ie_len = 0;
516 /* fall through */
517 default:
518 conf.vif = &sdata->vif;
519 conf.type = sdata->vif.type;
520 conf.mac_addr = dev->dev_addr;
521 /* disable all keys for as long as this netdev is down */
522 ieee80211_disable_keys(sdata);
523 local->ops->remove_interface(local_to_hw(local), &conf);
524 }
525
526 if (local->open_count == 0) {
527 if (netif_running(local->mdev))
528 dev_close(local->mdev);
529
530 if (local->ops->stop)
531 local->ops->stop(local_to_hw(local));
532
533 ieee80211_led_radio(local, 0);
534
535 tasklet_disable(&local->tx_pending_tasklet);
536 tasklet_disable(&local->tasklet);
537 }
538
539 return 0;
540 }
541
542 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
543 {
544 struct ieee80211_local *local = hw_to_local(hw);
545 struct sta_info *sta;
546 struct ieee80211_sub_if_data *sdata;
547 u16 start_seq_num = 0;
548 u8 *state;
549 int ret;
550 DECLARE_MAC_BUF(mac);
551
552 if (tid >= STA_TID_NUM)
553 return -EINVAL;
554
555 #ifdef CONFIG_MAC80211_HT_DEBUG
556 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
557 print_mac(mac, ra), tid);
558 #endif /* CONFIG_MAC80211_HT_DEBUG */
559
560 rcu_read_lock();
561
562 sta = sta_info_get(local, ra);
563 if (!sta) {
564 printk(KERN_DEBUG "Could not find the station\n");
565 rcu_read_unlock();
566 return -ENOENT;
567 }
568
569 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
570
571 /* we have tried too many times, receiver does not want A-MPDU */
572 if (sta->ampdu_mlme.tid_tx[tid].addba_req_num > HT_AGG_MAX_RETRIES) {
573 ret = -EBUSY;
574 goto start_ba_exit;
575 }
576
577 state = &sta->ampdu_mlme.tid_tx[tid].state;
578 /* check if the TID is not in aggregation flow already */
579 if (*state != HT_AGG_STATE_IDLE) {
580 #ifdef CONFIG_MAC80211_HT_DEBUG
581 printk(KERN_DEBUG "BA request denied - session is not "
582 "idle on tid %u\n", tid);
583 #endif /* CONFIG_MAC80211_HT_DEBUG */
584 ret = -EAGAIN;
585 goto start_ba_exit;
586 }
587
588 /* ensure that TX flow won't interrupt us
589 * until the end of the call to requeue function */
590 spin_lock_bh(&local->mdev->queue_lock);
591
592 /* create a new queue for this aggregation */
593 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
594
595 /* case no queue is available to aggregation
596 * don't switch to aggregation */
597 if (ret) {
598 #ifdef CONFIG_MAC80211_HT_DEBUG
599 printk(KERN_DEBUG "BA request denied - no queue available for"
600 " tid %d\n", tid);
601 #endif /* CONFIG_MAC80211_HT_DEBUG */
602 spin_unlock_bh(&local->mdev->queue_lock);
603 goto start_ba_exit;
604 }
605 sdata = sta->sdata;
606
607 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
608 * call back right away, it must see that the flow has begun */
609 *state |= HT_ADDBA_REQUESTED_MSK;
610
611 if (local->ops->ampdu_action)
612 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
613 ra, tid, &start_seq_num);
614
615 if (ret) {
616 /* No need to requeue the packets in the agg queue, since we
617 * held the tx lock: no packet could be enqueued to the newly
618 * allocated queue */
619 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
620 #ifdef CONFIG_MAC80211_HT_DEBUG
621 printk(KERN_DEBUG "BA request denied - HW or queue unavailable"
622 " for tid %d\n", tid);
623 #endif /* CONFIG_MAC80211_HT_DEBUG */
624 spin_unlock_bh(&local->mdev->queue_lock);
625 *state = HT_AGG_STATE_IDLE;
626 goto start_ba_exit;
627 }
628
629 /* Will put all the packets in the new SW queue */
630 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
631 spin_unlock_bh(&local->mdev->queue_lock);
632
633 /* We have most probably almost emptied the legacy queue */
634 /* ieee80211_wake_queue(local_to_hw(local), ieee802_1d_to_ac[tid]); */
635
636 /* send an addBA request */
637 sta->ampdu_mlme.dialog_token_allocator++;
638 sta->ampdu_mlme.tid_tx[tid].dialog_token =
639 sta->ampdu_mlme.dialog_token_allocator;
640 sta->ampdu_mlme.tid_tx[tid].ssn = start_seq_num;
641
642 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
643 sta->ampdu_mlme.tid_tx[tid].dialog_token,
644 sta->ampdu_mlme.tid_tx[tid].ssn,
645 0x40, 5000);
646
647 /* activate the timer for the recipient's addBA response */
648 sta->ampdu_mlme.tid_tx[tid].addba_resp_timer.expires =
649 jiffies + ADDBA_RESP_INTERVAL;
650 add_timer(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
651 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
652
653 start_ba_exit:
654 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
655 rcu_read_unlock();
656 return ret;
657 }
658 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
659
660 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
661 u8 *ra, u16 tid,
662 enum ieee80211_back_parties initiator)
663 {
664 struct ieee80211_local *local = hw_to_local(hw);
665 struct sta_info *sta;
666 u8 *state;
667 int ret = 0;
668 DECLARE_MAC_BUF(mac);
669
670 if (tid >= STA_TID_NUM)
671 return -EINVAL;
672
673 #ifdef CONFIG_MAC80211_HT_DEBUG
674 printk(KERN_DEBUG "Stop a BA session requested for %s tid %u\n",
675 print_mac(mac, ra), tid);
676 #endif /* CONFIG_MAC80211_HT_DEBUG */
677
678 rcu_read_lock();
679 sta = sta_info_get(local, ra);
680 if (!sta) {
681 rcu_read_unlock();
682 return -ENOENT;
683 }
684
685 /* check if the TID is in aggregation */
686 state = &sta->ampdu_mlme.tid_tx[tid].state;
687 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
688
689 if (*state != HT_AGG_STATE_OPERATIONAL) {
690 #ifdef CONFIG_MAC80211_HT_DEBUG
691 printk(KERN_DEBUG "Try to stop Tx aggregation on"
692 " non active TID\n");
693 #endif /* CONFIG_MAC80211_HT_DEBUG */
694 ret = -ENOENT;
695 goto stop_BA_exit;
696 }
697
698 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
699
700 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
701 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
702
703 if (local->ops->ampdu_action)
704 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
705 ra, tid, NULL);
706
707 /* case HW denied going back to legacy */
708 if (ret) {
709 WARN_ON(ret != -EBUSY);
710 *state = HT_AGG_STATE_OPERATIONAL;
711 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
712 goto stop_BA_exit;
713 }
714
715 stop_BA_exit:
716 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
717 rcu_read_unlock();
718 return ret;
719 }
720 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
721
722 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
723 {
724 struct ieee80211_local *local = hw_to_local(hw);
725 struct sta_info *sta;
726 u8 *state;
727 DECLARE_MAC_BUF(mac);
728
729 if (tid >= STA_TID_NUM) {
730 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
731 tid, STA_TID_NUM);
732 return;
733 }
734
735 rcu_read_lock();
736 sta = sta_info_get(local, ra);
737 if (!sta) {
738 rcu_read_unlock();
739 printk(KERN_DEBUG "Could not find station: %s\n",
740 print_mac(mac, ra));
741 return;
742 }
743
744 state = &sta->ampdu_mlme.tid_tx[tid].state;
745 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
746
747 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
748 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
749 *state);
750 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
751 rcu_read_unlock();
752 return;
753 }
754
755 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
756
757 *state |= HT_ADDBA_DRV_READY_MSK;
758
759 if (*state == HT_AGG_STATE_OPERATIONAL) {
760 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
761 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
762 }
763 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
764 rcu_read_unlock();
765 }
766 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
767
768 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
769 {
770 struct ieee80211_local *local = hw_to_local(hw);
771 struct sta_info *sta;
772 u8 *state;
773 int agg_queue;
774 DECLARE_MAC_BUF(mac);
775
776 if (tid >= STA_TID_NUM) {
777 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
778 tid, STA_TID_NUM);
779 return;
780 }
781
782 printk(KERN_DEBUG "Stop a BA session requested on DA %s tid %d\n",
783 print_mac(mac, ra), tid);
784
785 rcu_read_lock();
786 sta = sta_info_get(local, ra);
787 if (!sta) {
788 printk(KERN_DEBUG "Could not find station: %s\n",
789 print_mac(mac, ra));
790 rcu_read_unlock();
791 return;
792 }
793 state = &sta->ampdu_mlme.tid_tx[tid].state;
794
795 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
796 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
797 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
798 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
799 rcu_read_unlock();
800 return;
801 }
802
803 if (*state & HT_AGG_STATE_INITIATOR_MSK)
804 ieee80211_send_delba(sta->sdata->dev, ra, tid,
805 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
806
807 agg_queue = sta->tid_to_tx_q[tid];
808
809 /* avoid ordering issues: we are the only one that can modify
810 * the content of the qdiscs */
811 spin_lock_bh(&local->mdev->queue_lock);
812 /* remove the queue for this aggregation */
813 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
814 spin_unlock_bh(&local->mdev->queue_lock);
815
816 /* we just requeued the all the frames that were in the removed
817 * queue, and since we might miss a softirq we do netif_schedule.
818 * ieee80211_wake_queue is not used here as this queue is not
819 * necessarily stopped */
820 netif_schedule(local->mdev);
821 *state = HT_AGG_STATE_IDLE;
822 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
823 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
824
825 rcu_read_unlock();
826 }
827 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
828
829 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
830 const u8 *ra, u16 tid)
831 {
832 struct ieee80211_local *local = hw_to_local(hw);
833 struct ieee80211_ra_tid *ra_tid;
834 struct sk_buff *skb = dev_alloc_skb(0);
835
836 if (unlikely(!skb)) {
837 if (net_ratelimit())
838 printk(KERN_WARNING "%s: Not enough memory, "
839 "dropping start BA session", skb->dev->name);
840 return;
841 }
842 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
843 memcpy(&ra_tid->ra, ra, ETH_ALEN);
844 ra_tid->tid = tid;
845
846 skb->pkt_type = IEEE80211_ADDBA_MSG;
847 skb_queue_tail(&local->skb_queue, skb);
848 tasklet_schedule(&local->tasklet);
849 }
850 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
851
852 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
853 const u8 *ra, u16 tid)
854 {
855 struct ieee80211_local *local = hw_to_local(hw);
856 struct ieee80211_ra_tid *ra_tid;
857 struct sk_buff *skb = dev_alloc_skb(0);
858
859 if (unlikely(!skb)) {
860 if (net_ratelimit())
861 printk(KERN_WARNING "%s: Not enough memory, "
862 "dropping stop BA session", skb->dev->name);
863 return;
864 }
865 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
866 memcpy(&ra_tid->ra, ra, ETH_ALEN);
867 ra_tid->tid = tid;
868
869 skb->pkt_type = IEEE80211_DELBA_MSG;
870 skb_queue_tail(&local->skb_queue, skb);
871 tasklet_schedule(&local->tasklet);
872 }
873 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
874
875 static void ieee80211_set_multicast_list(struct net_device *dev)
876 {
877 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
878 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
879 int allmulti, promisc, sdata_allmulti, sdata_promisc;
880
881 allmulti = !!(dev->flags & IFF_ALLMULTI);
882 promisc = !!(dev->flags & IFF_PROMISC);
883 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
884 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
885
886 if (allmulti != sdata_allmulti) {
887 if (dev->flags & IFF_ALLMULTI)
888 atomic_inc(&local->iff_allmultis);
889 else
890 atomic_dec(&local->iff_allmultis);
891 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
892 }
893
894 if (promisc != sdata_promisc) {
895 if (dev->flags & IFF_PROMISC)
896 atomic_inc(&local->iff_promiscs);
897 else
898 atomic_dec(&local->iff_promiscs);
899 sdata->flags ^= IEEE80211_SDATA_PROMISC;
900 }
901
902 dev_mc_sync(local->mdev, dev);
903 }
904
905 static const struct header_ops ieee80211_header_ops = {
906 .create = eth_header,
907 .parse = header_parse_80211,
908 .rebuild = eth_rebuild_header,
909 .cache = eth_header_cache,
910 .cache_update = eth_header_cache_update,
911 };
912
913 /* Must not be called for mdev */
914 void ieee80211_if_setup(struct net_device *dev)
915 {
916 ether_setup(dev);
917 dev->hard_start_xmit = ieee80211_subif_start_xmit;
918 dev->wireless_handlers = &ieee80211_iw_handler_def;
919 dev->set_multicast_list = ieee80211_set_multicast_list;
920 dev->change_mtu = ieee80211_change_mtu;
921 dev->open = ieee80211_open;
922 dev->stop = ieee80211_stop;
923 dev->destructor = ieee80211_if_free;
924 }
925
926 /* everything else */
927
928 static int __ieee80211_if_config(struct net_device *dev,
929 struct sk_buff *beacon,
930 struct ieee80211_tx_control *control)
931 {
932 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
933 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
934 struct ieee80211_if_conf conf;
935
936 if (!local->ops->config_interface || !netif_running(dev))
937 return 0;
938
939 memset(&conf, 0, sizeof(conf));
940 conf.type = sdata->vif.type;
941 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
942 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
943 conf.bssid = sdata->u.sta.bssid;
944 conf.ssid = sdata->u.sta.ssid;
945 conf.ssid_len = sdata->u.sta.ssid_len;
946 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
947 conf.beacon = beacon;
948 ieee80211_start_mesh(dev);
949 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
950 conf.ssid = sdata->u.ap.ssid;
951 conf.ssid_len = sdata->u.ap.ssid_len;
952 conf.beacon = beacon;
953 conf.beacon_control = control;
954 }
955 return local->ops->config_interface(local_to_hw(local),
956 &sdata->vif, &conf);
957 }
958
959 int ieee80211_if_config(struct net_device *dev)
960 {
961 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
962 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
963 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
964 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
965 return ieee80211_if_config_beacon(dev);
966 return __ieee80211_if_config(dev, NULL, NULL);
967 }
968
969 int ieee80211_if_config_beacon(struct net_device *dev)
970 {
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
972 struct ieee80211_tx_control control;
973 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
974 struct sk_buff *skb;
975
976 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
977 return 0;
978 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
979 &control);
980 if (!skb)
981 return -ENOMEM;
982 return __ieee80211_if_config(dev, skb, &control);
983 }
984
985 int ieee80211_hw_config(struct ieee80211_local *local)
986 {
987 struct ieee80211_channel *chan;
988 int ret = 0;
989
990 if (local->sta_sw_scanning)
991 chan = local->scan_channel;
992 else
993 chan = local->oper_channel;
994
995 local->hw.conf.channel = chan;
996
997 if (!local->hw.conf.power_level)
998 local->hw.conf.power_level = chan->max_power;
999 else
1000 local->hw.conf.power_level = min(chan->max_power,
1001 local->hw.conf.power_level);
1002
1003 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1004
1005 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1006 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1007 wiphy_name(local->hw.wiphy), chan->center_freq);
1008 #endif
1009
1010 if (local->open_count)
1011 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1012
1013 return ret;
1014 }
1015
1016 /**
1017 * ieee80211_hw_config_ht should be used only after legacy configuration
1018 * has been determined, as ht configuration depends upon the hardware's
1019 * HT abilities for a _specific_ band.
1020 */
1021 int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
1022 struct ieee80211_ht_info *req_ht_cap,
1023 struct ieee80211_ht_bss_info *req_bss_cap)
1024 {
1025 struct ieee80211_conf *conf = &local->hw.conf;
1026 struct ieee80211_supported_band *sband;
1027 int i;
1028
1029 sband = local->hw.wiphy->bands[conf->channel->band];
1030
1031 /* HT is not supported */
1032 if (!sband->ht_info.ht_supported) {
1033 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1034 return -EOPNOTSUPP;
1035 }
1036
1037 /* disable HT */
1038 if (!enable_ht) {
1039 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1040 } else {
1041 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1042 conf->ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1043 conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1044 conf->ht_conf.cap |=
1045 sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1046 conf->ht_bss_conf.primary_channel =
1047 req_bss_cap->primary_channel;
1048 conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1049 conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1050 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
1051 conf->ht_conf.supp_mcs_set[i] =
1052 sband->ht_info.supp_mcs_set[i] &
1053 req_ht_cap->supp_mcs_set[i];
1054
1055 /* In STA mode, this gives us indication
1056 * to the AP's mode of operation */
1057 conf->ht_conf.ht_supported = 1;
1058 conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1059 conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1060 }
1061
1062 local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
1063
1064 return 0;
1065 }
1066
1067 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1068 u32 changed)
1069 {
1070 struct ieee80211_local *local = sdata->local;
1071
1072 if (!changed)
1073 return;
1074
1075 if (local->ops->bss_info_changed)
1076 local->ops->bss_info_changed(local_to_hw(local),
1077 &sdata->vif,
1078 &sdata->bss_conf,
1079 changed);
1080 }
1081
1082 void ieee80211_reset_erp_info(struct net_device *dev)
1083 {
1084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1085
1086 sdata->bss_conf.use_cts_prot = 0;
1087 sdata->bss_conf.use_short_preamble = 0;
1088 ieee80211_bss_info_change_notify(sdata,
1089 BSS_CHANGED_ERP_CTS_PROT |
1090 BSS_CHANGED_ERP_PREAMBLE);
1091 }
1092
1093 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1094 struct sk_buff *skb,
1095 struct ieee80211_tx_status *status)
1096 {
1097 struct ieee80211_local *local = hw_to_local(hw);
1098 struct ieee80211_tx_status *saved;
1099 int tmp;
1100
1101 skb->dev = local->mdev;
1102 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1103 if (unlikely(!saved)) {
1104 if (net_ratelimit())
1105 printk(KERN_WARNING "%s: Not enough memory, "
1106 "dropping tx status", skb->dev->name);
1107 /* should be dev_kfree_skb_irq, but due to this function being
1108 * named _irqsafe instead of just _irq we can't be sure that
1109 * people won't call it from non-irq contexts */
1110 dev_kfree_skb_any(skb);
1111 return;
1112 }
1113 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1114 /* copy pointer to saved status into skb->cb for use by tasklet */
1115 memcpy(skb->cb, &saved, sizeof(saved));
1116
1117 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1118 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1119 &local->skb_queue : &local->skb_queue_unreliable, skb);
1120 tmp = skb_queue_len(&local->skb_queue) +
1121 skb_queue_len(&local->skb_queue_unreliable);
1122 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1123 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1124 memcpy(&saved, skb->cb, sizeof(saved));
1125 kfree(saved);
1126 dev_kfree_skb_irq(skb);
1127 tmp--;
1128 I802_DEBUG_INC(local->tx_status_drop);
1129 }
1130 tasklet_schedule(&local->tasklet);
1131 }
1132 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1133
1134 static void ieee80211_tasklet_handler(unsigned long data)
1135 {
1136 struct ieee80211_local *local = (struct ieee80211_local *) data;
1137 struct sk_buff *skb;
1138 struct ieee80211_rx_status rx_status;
1139 struct ieee80211_tx_status *tx_status;
1140 struct ieee80211_ra_tid *ra_tid;
1141
1142 while ((skb = skb_dequeue(&local->skb_queue)) ||
1143 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1144 switch (skb->pkt_type) {
1145 case IEEE80211_RX_MSG:
1146 /* status is in skb->cb */
1147 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1148 /* Clear skb->pkt_type in order to not confuse kernel
1149 * netstack. */
1150 skb->pkt_type = 0;
1151 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1152 break;
1153 case IEEE80211_TX_STATUS_MSG:
1154 /* get pointer to saved status out of skb->cb */
1155 memcpy(&tx_status, skb->cb, sizeof(tx_status));
1156 skb->pkt_type = 0;
1157 ieee80211_tx_status(local_to_hw(local),
1158 skb, tx_status);
1159 kfree(tx_status);
1160 break;
1161 case IEEE80211_DELBA_MSG:
1162 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1163 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1164 ra_tid->ra, ra_tid->tid);
1165 dev_kfree_skb(skb);
1166 break;
1167 case IEEE80211_ADDBA_MSG:
1168 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1169 ieee80211_start_tx_ba_cb(local_to_hw(local),
1170 ra_tid->ra, ra_tid->tid);
1171 dev_kfree_skb(skb);
1172 break ;
1173 default: /* should never get here! */
1174 printk(KERN_ERR "%s: Unknown message type (%d)\n",
1175 wiphy_name(local->hw.wiphy), skb->pkt_type);
1176 dev_kfree_skb(skb);
1177 break;
1178 }
1179 }
1180 }
1181
1182 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1183 * make a prepared TX frame (one that has been given to hw) to look like brand
1184 * new IEEE 802.11 frame that is ready to go through TX processing again.
1185 * Also, tx_packet_data in cb is restored from tx_control. */
1186 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1187 struct ieee80211_key *key,
1188 struct sk_buff *skb,
1189 struct ieee80211_tx_control *control)
1190 {
1191 int hdrlen, iv_len, mic_len;
1192 struct ieee80211_tx_packet_data *pkt_data;
1193
1194 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1195 pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
1196 pkt_data->flags = 0;
1197 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
1198 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
1199 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
1200 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
1201 if (control->flags & IEEE80211_TXCTL_REQUEUE)
1202 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
1203 if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
1204 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
1205 pkt_data->queue = control->queue;
1206
1207 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1208
1209 if (!key)
1210 goto no_key;
1211
1212 switch (key->conf.alg) {
1213 case ALG_WEP:
1214 iv_len = WEP_IV_LEN;
1215 mic_len = WEP_ICV_LEN;
1216 break;
1217 case ALG_TKIP:
1218 iv_len = TKIP_IV_LEN;
1219 mic_len = TKIP_ICV_LEN;
1220 break;
1221 case ALG_CCMP:
1222 iv_len = CCMP_HDR_LEN;
1223 mic_len = CCMP_MIC_LEN;
1224 break;
1225 default:
1226 goto no_key;
1227 }
1228
1229 if (skb->len >= mic_len &&
1230 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1231 skb_trim(skb, skb->len - mic_len);
1232 if (skb->len >= iv_len && skb->len > hdrlen) {
1233 memmove(skb->data + iv_len, skb->data, hdrlen);
1234 skb_pull(skb, iv_len);
1235 }
1236
1237 no_key:
1238 {
1239 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1240 u16 fc = le16_to_cpu(hdr->frame_control);
1241 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1242 fc &= ~IEEE80211_STYPE_QOS_DATA;
1243 hdr->frame_control = cpu_to_le16(fc);
1244 memmove(skb->data + 2, skb->data, hdrlen - 2);
1245 skb_pull(skb, 2);
1246 }
1247 }
1248 }
1249
1250 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1251 struct sta_info *sta,
1252 struct sk_buff *skb,
1253 struct ieee80211_tx_status *status)
1254 {
1255 sta->tx_filtered_count++;
1256
1257 /*
1258 * Clear the TX filter mask for this STA when sending the next
1259 * packet. If the STA went to power save mode, this will happen
1260 * happen when it wakes up for the next time.
1261 */
1262 sta->flags |= WLAN_STA_CLEAR_PS_FILT;
1263
1264 /*
1265 * This code races in the following way:
1266 *
1267 * (1) STA sends frame indicating it will go to sleep and does so
1268 * (2) hardware/firmware adds STA to filter list, passes frame up
1269 * (3) hardware/firmware processes TX fifo and suppresses a frame
1270 * (4) we get TX status before having processed the frame and
1271 * knowing that the STA has gone to sleep.
1272 *
1273 * This is actually quite unlikely even when both those events are
1274 * processed from interrupts coming in quickly after one another or
1275 * even at the same time because we queue both TX status events and
1276 * RX frames to be processed by a tasklet and process them in the
1277 * same order that they were received or TX status last. Hence, there
1278 * is no race as long as the frame RX is processed before the next TX
1279 * status, which drivers can ensure, see below.
1280 *
1281 * Note that this can only happen if the hardware or firmware can
1282 * actually add STAs to the filter list, if this is done by the
1283 * driver in response to set_tim() (which will only reduce the race
1284 * this whole filtering tries to solve, not completely solve it)
1285 * this situation cannot happen.
1286 *
1287 * To completely solve this race drivers need to make sure that they
1288 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1289 * functions and
1290 * (b) always process RX events before TX status events if ordering
1291 * can be unknown, for example with different interrupt status
1292 * bits.
1293 */
1294 if (sta->flags & WLAN_STA_PS &&
1295 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1296 ieee80211_remove_tx_extra(local, sta->key, skb,
1297 &status->control);
1298 skb_queue_tail(&sta->tx_filtered, skb);
1299 return;
1300 }
1301
1302 if (!(sta->flags & WLAN_STA_PS) &&
1303 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1304 /* Software retry the packet once */
1305 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1306 ieee80211_remove_tx_extra(local, sta->key, skb,
1307 &status->control);
1308 dev_queue_xmit(skb);
1309 return;
1310 }
1311
1312 if (net_ratelimit())
1313 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1314 "queue_len=%d PS=%d @%lu\n",
1315 wiphy_name(local->hw.wiphy),
1316 skb_queue_len(&sta->tx_filtered),
1317 !!(sta->flags & WLAN_STA_PS), jiffies);
1318 dev_kfree_skb(skb);
1319 }
1320
1321 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1322 struct ieee80211_tx_status *status)
1323 {
1324 struct sk_buff *skb2;
1325 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1326 struct ieee80211_local *local = hw_to_local(hw);
1327 u16 frag, type;
1328 struct ieee80211_tx_status_rtap_hdr *rthdr;
1329 struct ieee80211_sub_if_data *sdata;
1330 struct net_device *prev_dev = NULL;
1331
1332 if (!status) {
1333 printk(KERN_ERR
1334 "%s: ieee80211_tx_status called with NULL status\n",
1335 wiphy_name(local->hw.wiphy));
1336 dev_kfree_skb(skb);
1337 return;
1338 }
1339
1340 rcu_read_lock();
1341
1342 if (status->excessive_retries) {
1343 struct sta_info *sta;
1344 sta = sta_info_get(local, hdr->addr1);
1345 if (sta) {
1346 if (sta->flags & WLAN_STA_PS) {
1347 /*
1348 * The STA is in power save mode, so assume
1349 * that this TX packet failed because of that.
1350 */
1351 status->excessive_retries = 0;
1352 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1353 ieee80211_handle_filtered_frame(local, sta,
1354 skb, status);
1355 rcu_read_unlock();
1356 return;
1357 }
1358 }
1359 }
1360
1361 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1362 struct sta_info *sta;
1363 sta = sta_info_get(local, hdr->addr1);
1364 if (sta) {
1365 ieee80211_handle_filtered_frame(local, sta, skb,
1366 status);
1367 rcu_read_unlock();
1368 return;
1369 }
1370 } else
1371 rate_control_tx_status(local->mdev, skb, status);
1372
1373 rcu_read_unlock();
1374
1375 ieee80211_led_tx(local, 0);
1376
1377 /* SNMP counters
1378 * Fragments are passed to low-level drivers as separate skbs, so these
1379 * are actually fragments, not frames. Update frame counters only for
1380 * the first fragment of the frame. */
1381
1382 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1383 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1384
1385 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1386 if (frag == 0) {
1387 local->dot11TransmittedFrameCount++;
1388 if (is_multicast_ether_addr(hdr->addr1))
1389 local->dot11MulticastTransmittedFrameCount++;
1390 if (status->retry_count > 0)
1391 local->dot11RetryCount++;
1392 if (status->retry_count > 1)
1393 local->dot11MultipleRetryCount++;
1394 }
1395
1396 /* This counter shall be incremented for an acknowledged MPDU
1397 * with an individual address in the address 1 field or an MPDU
1398 * with a multicast address in the address 1 field of type Data
1399 * or Management. */
1400 if (!is_multicast_ether_addr(hdr->addr1) ||
1401 type == IEEE80211_FTYPE_DATA ||
1402 type == IEEE80211_FTYPE_MGMT)
1403 local->dot11TransmittedFragmentCount++;
1404 } else {
1405 if (frag == 0)
1406 local->dot11FailedCount++;
1407 }
1408
1409 /* this was a transmitted frame, but now we want to reuse it */
1410 skb_orphan(skb);
1411
1412 /*
1413 * This is a bit racy but we can avoid a lot of work
1414 * with this test...
1415 */
1416 if (!local->monitors && !local->cooked_mntrs) {
1417 dev_kfree_skb(skb);
1418 return;
1419 }
1420
1421 /* send frame to monitor interfaces now */
1422
1423 if (skb_headroom(skb) < sizeof(*rthdr)) {
1424 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1425 dev_kfree_skb(skb);
1426 return;
1427 }
1428
1429 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1430 skb_push(skb, sizeof(*rthdr));
1431
1432 memset(rthdr, 0, sizeof(*rthdr));
1433 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1434 rthdr->hdr.it_present =
1435 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1436 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1437
1438 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1439 !is_multicast_ether_addr(hdr->addr1))
1440 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1441
1442 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1443 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1444 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1445 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1446 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1447
1448 rthdr->data_retries = status->retry_count;
1449
1450 /* XXX: is this sufficient for BPF? */
1451 skb_set_mac_header(skb, 0);
1452 skb->ip_summed = CHECKSUM_UNNECESSARY;
1453 skb->pkt_type = PACKET_OTHERHOST;
1454 skb->protocol = htons(ETH_P_802_2);
1455 memset(skb->cb, 0, sizeof(skb->cb));
1456
1457 rcu_read_lock();
1458 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1459 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1460 if (!netif_running(sdata->dev))
1461 continue;
1462
1463 if (prev_dev) {
1464 skb2 = skb_clone(skb, GFP_ATOMIC);
1465 if (skb2) {
1466 skb2->dev = prev_dev;
1467 netif_rx(skb2);
1468 }
1469 }
1470
1471 prev_dev = sdata->dev;
1472 }
1473 }
1474 if (prev_dev) {
1475 skb->dev = prev_dev;
1476 netif_rx(skb);
1477 skb = NULL;
1478 }
1479 rcu_read_unlock();
1480 dev_kfree_skb(skb);
1481 }
1482 EXPORT_SYMBOL(ieee80211_tx_status);
1483
1484 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1485 const struct ieee80211_ops *ops)
1486 {
1487 struct ieee80211_local *local;
1488 int priv_size;
1489 struct wiphy *wiphy;
1490
1491 /* Ensure 32-byte alignment of our private data and hw private data.
1492 * We use the wiphy priv data for both our ieee80211_local and for
1493 * the driver's private data
1494 *
1495 * In memory it'll be like this:
1496 *
1497 * +-------------------------+
1498 * | struct wiphy |
1499 * +-------------------------+
1500 * | struct ieee80211_local |
1501 * +-------------------------+
1502 * | driver's private data |
1503 * +-------------------------+
1504 *
1505 */
1506 priv_size = ((sizeof(struct ieee80211_local) +
1507 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1508 priv_data_len;
1509
1510 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1511
1512 if (!wiphy)
1513 return NULL;
1514
1515 wiphy->privid = mac80211_wiphy_privid;
1516
1517 local = wiphy_priv(wiphy);
1518 local->hw.wiphy = wiphy;
1519
1520 local->hw.priv = (char *)local +
1521 ((sizeof(struct ieee80211_local) +
1522 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1523
1524 BUG_ON(!ops->tx);
1525 BUG_ON(!ops->start);
1526 BUG_ON(!ops->stop);
1527 BUG_ON(!ops->config);
1528 BUG_ON(!ops->add_interface);
1529 BUG_ON(!ops->remove_interface);
1530 BUG_ON(!ops->configure_filter);
1531 local->ops = ops;
1532
1533 local->hw.queues = 1; /* default */
1534
1535 local->bridge_packets = 1;
1536
1537 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1538 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1539 local->short_retry_limit = 7;
1540 local->long_retry_limit = 4;
1541 local->hw.conf.radio_enabled = 1;
1542
1543 INIT_LIST_HEAD(&local->interfaces);
1544
1545 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1546
1547 sta_info_init(local);
1548
1549 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1550 (unsigned long)local);
1551 tasklet_disable(&local->tx_pending_tasklet);
1552
1553 tasklet_init(&local->tasklet,
1554 ieee80211_tasklet_handler,
1555 (unsigned long) local);
1556 tasklet_disable(&local->tasklet);
1557
1558 skb_queue_head_init(&local->skb_queue);
1559 skb_queue_head_init(&local->skb_queue_unreliable);
1560
1561 return local_to_hw(local);
1562 }
1563 EXPORT_SYMBOL(ieee80211_alloc_hw);
1564
1565 int ieee80211_register_hw(struct ieee80211_hw *hw)
1566 {
1567 struct ieee80211_local *local = hw_to_local(hw);
1568 const char *name;
1569 int result;
1570 enum ieee80211_band band;
1571 struct net_device *mdev;
1572 struct ieee80211_sub_if_data *sdata;
1573
1574 /*
1575 * generic code guarantees at least one band,
1576 * set this very early because much code assumes
1577 * that hw.conf.channel is assigned
1578 */
1579 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1580 struct ieee80211_supported_band *sband;
1581
1582 sband = local->hw.wiphy->bands[band];
1583 if (sband) {
1584 /* init channel we're on */
1585 local->hw.conf.channel =
1586 local->oper_channel =
1587 local->scan_channel = &sband->channels[0];
1588 break;
1589 }
1590 }
1591
1592 result = wiphy_register(local->hw.wiphy);
1593 if (result < 0)
1594 return result;
1595
1596 /* for now, mdev needs sub_if_data :/ */
1597 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1598 "wmaster%d", ether_setup);
1599 if (!mdev)
1600 goto fail_mdev_alloc;
1601
1602 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1603 mdev->ieee80211_ptr = &sdata->wdev;
1604 sdata->wdev.wiphy = local->hw.wiphy;
1605
1606 local->mdev = mdev;
1607
1608 ieee80211_rx_bss_list_init(mdev);
1609
1610 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1611 mdev->open = ieee80211_master_open;
1612 mdev->stop = ieee80211_master_stop;
1613 mdev->type = ARPHRD_IEEE80211;
1614 mdev->header_ops = &ieee80211_header_ops;
1615 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1616
1617 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1618 sdata->dev = mdev;
1619 sdata->local = local;
1620 sdata->u.ap.force_unicast_rateidx = -1;
1621 sdata->u.ap.max_ratectrl_rateidx = -1;
1622 ieee80211_if_sdata_init(sdata);
1623
1624 /* no RCU needed since we're still during init phase */
1625 list_add_tail(&sdata->list, &local->interfaces);
1626
1627 name = wiphy_dev(local->hw.wiphy)->driver->name;
1628 local->hw.workqueue = create_singlethread_workqueue(name);
1629 if (!local->hw.workqueue) {
1630 result = -ENOMEM;
1631 goto fail_workqueue;
1632 }
1633
1634 /*
1635 * The hardware needs headroom for sending the frame,
1636 * and we need some headroom for passing the frame to monitor
1637 * interfaces, but never both at the same time.
1638 */
1639 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1640 sizeof(struct ieee80211_tx_status_rtap_hdr));
1641
1642 debugfs_hw_add(local);
1643
1644 local->hw.conf.beacon_int = 1000;
1645
1646 local->wstats_flags |= local->hw.max_rssi ?
1647 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1648 local->wstats_flags |= local->hw.max_signal ?
1649 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1650 local->wstats_flags |= local->hw.max_noise ?
1651 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1652 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1653 local->wstats_flags |= IW_QUAL_DBM;
1654
1655 result = sta_info_start(local);
1656 if (result < 0)
1657 goto fail_sta_info;
1658
1659 rtnl_lock();
1660 result = dev_alloc_name(local->mdev, local->mdev->name);
1661 if (result < 0)
1662 goto fail_dev;
1663
1664 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1665 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1666
1667 result = register_netdevice(local->mdev);
1668 if (result < 0)
1669 goto fail_dev;
1670
1671 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1672 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1673
1674 result = ieee80211_init_rate_ctrl_alg(local,
1675 hw->rate_control_algorithm);
1676 if (result < 0) {
1677 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1678 "algorithm\n", wiphy_name(local->hw.wiphy));
1679 goto fail_rate;
1680 }
1681
1682 result = ieee80211_wep_init(local);
1683
1684 if (result < 0) {
1685 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1686 wiphy_name(local->hw.wiphy));
1687 goto fail_wep;
1688 }
1689
1690 ieee80211_install_qdisc(local->mdev);
1691
1692 /* add one default STA interface */
1693 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1694 IEEE80211_IF_TYPE_STA, NULL);
1695 if (result)
1696 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1697 wiphy_name(local->hw.wiphy));
1698
1699 local->reg_state = IEEE80211_DEV_REGISTERED;
1700 rtnl_unlock();
1701
1702 ieee80211_led_init(local);
1703
1704 return 0;
1705
1706 fail_wep:
1707 rate_control_deinitialize(local);
1708 fail_rate:
1709 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1710 unregister_netdevice(local->mdev);
1711 fail_dev:
1712 rtnl_unlock();
1713 sta_info_stop(local);
1714 fail_sta_info:
1715 debugfs_hw_del(local);
1716 destroy_workqueue(local->hw.workqueue);
1717 fail_workqueue:
1718 ieee80211_if_free(local->mdev);
1719 local->mdev = NULL;
1720 fail_mdev_alloc:
1721 wiphy_unregister(local->hw.wiphy);
1722 return result;
1723 }
1724 EXPORT_SYMBOL(ieee80211_register_hw);
1725
1726 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1727 {
1728 struct ieee80211_local *local = hw_to_local(hw);
1729 struct ieee80211_sub_if_data *sdata, *tmp;
1730
1731 tasklet_kill(&local->tx_pending_tasklet);
1732 tasklet_kill(&local->tasklet);
1733
1734 rtnl_lock();
1735
1736 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1737
1738 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1739
1740 /*
1741 * At this point, interface list manipulations are fine
1742 * because the driver cannot be handing us frames any
1743 * more and the tasklet is killed.
1744 */
1745
1746 /*
1747 * First, we remove all non-master interfaces. Do this because they
1748 * may have bss pointer dependency on the master, and when we free
1749 * the master these would be freed as well, breaking our list
1750 * iteration completely.
1751 */
1752 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1753 if (sdata->dev == local->mdev)
1754 continue;
1755 list_del(&sdata->list);
1756 __ieee80211_if_del(local, sdata);
1757 }
1758
1759 /* then, finally, remove the master interface */
1760 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1761
1762 rtnl_unlock();
1763
1764 ieee80211_rx_bss_list_deinit(local->mdev);
1765 ieee80211_clear_tx_pending(local);
1766 sta_info_stop(local);
1767 rate_control_deinitialize(local);
1768 debugfs_hw_del(local);
1769
1770 if (skb_queue_len(&local->skb_queue)
1771 || skb_queue_len(&local->skb_queue_unreliable))
1772 printk(KERN_WARNING "%s: skb_queue not empty\n",
1773 wiphy_name(local->hw.wiphy));
1774 skb_queue_purge(&local->skb_queue);
1775 skb_queue_purge(&local->skb_queue_unreliable);
1776
1777 destroy_workqueue(local->hw.workqueue);
1778 wiphy_unregister(local->hw.wiphy);
1779 ieee80211_wep_free(local);
1780 ieee80211_led_exit(local);
1781 ieee80211_if_free(local->mdev);
1782 local->mdev = NULL;
1783 }
1784 EXPORT_SYMBOL(ieee80211_unregister_hw);
1785
1786 void ieee80211_free_hw(struct ieee80211_hw *hw)
1787 {
1788 struct ieee80211_local *local = hw_to_local(hw);
1789
1790 wiphy_free(local->hw.wiphy);
1791 }
1792 EXPORT_SYMBOL(ieee80211_free_hw);
1793
1794 static int __init ieee80211_init(void)
1795 {
1796 struct sk_buff *skb;
1797 int ret;
1798
1799 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1800
1801 ret = rc80211_pid_init();
1802 if (ret)
1803 goto out;
1804
1805 ret = ieee80211_wme_register();
1806 if (ret) {
1807 printk(KERN_DEBUG "ieee80211_init: failed to "
1808 "initialize WME (err=%d)\n", ret);
1809 goto out_cleanup_pid;
1810 }
1811
1812 ieee80211_debugfs_netdev_init();
1813
1814 return 0;
1815
1816 out_cleanup_pid:
1817 rc80211_pid_exit();
1818 out:
1819 return ret;
1820 }
1821
1822 static void __exit ieee80211_exit(void)
1823 {
1824 rc80211_pid_exit();
1825
1826 if (mesh_allocated)
1827 ieee80211s_stop();
1828
1829 ieee80211_wme_unregister();
1830 ieee80211_debugfs_netdev_exit();
1831 }
1832
1833
1834 subsys_initcall(ieee80211_init);
1835 module_exit(ieee80211_exit);
1836
1837 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1838 MODULE_LICENSE("GPL");
Linus' kernel tree