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16#include <net/mac80211.h>
17#include <linux/netdevice.h>
18#include <linux/export.h>
19#include <linux/types.h>
20#include <linux/slab.h>
21#include <linux/skbuff.h>
22#include <linux/etherdevice.h>
23#include <linux/if_arp.h>
24#include <linux/bitmap.h>
25#include <linux/crc32.h>
26#include <net/net_namespace.h>
27#include <net/cfg80211.h>
28#include <net/rtnetlink.h>
29
30#include "ieee80211_i.h"
31#include "driver-ops.h"
32#include "rate.h"
33#include "mesh.h"
34#include "wme.h"
35#include "led.h"
36#include "wep.h"
37
38
39const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40
41struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42{
43 struct ieee80211_local *local;
44 BUG_ON(!wiphy);
45
46 local = wiphy_priv(wiphy);
47 return &local->hw;
48}
49EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50
51void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
52{
53 struct sk_buff *skb;
54 struct ieee80211_hdr *hdr;
55
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
59 }
60}
61
62int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
64 int shift)
65{
66 int dur;
67
68
69
70
71
72
73
74
75
76
77
78
79
80 if (band == IEEE80211_BAND_5GHZ || erp) {
81
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90
91
92
93
94 dur = 16;
95 dur += 16;
96 dur += 4;
97
98
99
100
101
102 dur *= 1 << shift;
103
104
105
106
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate);
109 } else {
110
111
112
113
114
115
116
117
118
119
120 dur = 10;
121 dur += short_preamble ? (72 + 24) : (144 + 48);
122
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
124 }
125
126 return dur;
127}
128
129
130__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum ieee80211_band band,
133 size_t frame_len,
134 struct ieee80211_rate *rate)
135{
136 struct ieee80211_sub_if_data *sdata;
137 u16 dur;
138 int erp, shift = 0;
139 bool short_preamble = false;
140
141 erp = 0;
142 if (vif) {
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
148 }
149
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
152
153 return cpu_to_le16(dur);
154}
155EXPORT_SYMBOL(ieee80211_generic_frame_duration);
156
157__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
160{
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
164 bool short_preamble;
165 int erp, shift = 0, bitrate;
166 u16 dur;
167 struct ieee80211_supported_band *sband;
168
169 sband = local->hw.wiphy->bands[frame_txctl->band];
170
171 short_preamble = false;
172
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
174
175 erp = 0;
176 if (vif) {
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
182 }
183
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
185
186
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
192
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
195
196 return cpu_to_le16(dur);
197}
198EXPORT_SYMBOL(ieee80211_rts_duration);
199
200__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
202 size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204{
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, shift = 0, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218 erp = 0;
219 if (vif) {
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
225 }
226
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
228
229
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
233
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 }
237
238 return cpu_to_le16(dur);
239}
240EXPORT_SYMBOL(ieee80211_ctstoself_duration);
241
242void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
243{
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
246
247 if (local->hw.queues < IEEE80211_NUM_ACS)
248 n_acs = 1;
249
250 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
251 int ac;
252
253 if (!sdata->dev)
254 continue;
255
256 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
257 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
258 continue;
259
260 for (ac = 0; ac < n_acs; ac++) {
261 int ac_queue = sdata->vif.hw_queue[ac];
262
263 if (local->ops->wake_tx_queue &&
264 (atomic_read(&sdata->txqs_len[ac]) >
265 local->hw.txq_ac_max_pending))
266 continue;
267
268 if (ac_queue == queue ||
269 (sdata->vif.cab_queue == queue &&
270 local->queue_stop_reasons[ac_queue] == 0 &&
271 skb_queue_empty(&local->pending[ac_queue])))
272 netif_wake_subqueue(sdata->dev, ac);
273 }
274 }
275}
276
277static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
278 enum queue_stop_reason reason,
279 bool refcounted)
280{
281 struct ieee80211_local *local = hw_to_local(hw);
282
283 trace_wake_queue(local, queue, reason);
284
285 if (WARN_ON(queue >= hw->queues))
286 return;
287
288 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
289 return;
290
291 if (!refcounted) {
292 local->q_stop_reasons[queue][reason] = 0;
293 } else {
294 local->q_stop_reasons[queue][reason]--;
295 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
296 local->q_stop_reasons[queue][reason] = 0;
297 }
298
299 if (local->q_stop_reasons[queue][reason] == 0)
300 __clear_bit(reason, &local->queue_stop_reasons[queue]);
301
302 if (local->queue_stop_reasons[queue] != 0)
303
304 return;
305
306 if (skb_queue_empty(&local->pending[queue])) {
307 rcu_read_lock();
308 ieee80211_propagate_queue_wake(local, queue);
309 rcu_read_unlock();
310 } else
311 tasklet_schedule(&local->tx_pending_tasklet);
312}
313
314void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
315 enum queue_stop_reason reason,
316 bool refcounted)
317{
318 struct ieee80211_local *local = hw_to_local(hw);
319 unsigned long flags;
320
321 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
322 __ieee80211_wake_queue(hw, queue, reason, refcounted);
323 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
324}
325
326void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
327{
328 ieee80211_wake_queue_by_reason(hw, queue,
329 IEEE80211_QUEUE_STOP_REASON_DRIVER,
330 false);
331}
332EXPORT_SYMBOL(ieee80211_wake_queue);
333
334static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
335 enum queue_stop_reason reason,
336 bool refcounted)
337{
338 struct ieee80211_local *local = hw_to_local(hw);
339 struct ieee80211_sub_if_data *sdata;
340 int n_acs = IEEE80211_NUM_ACS;
341
342 trace_stop_queue(local, queue, reason);
343
344 if (WARN_ON(queue >= hw->queues))
345 return;
346
347 if (!refcounted)
348 local->q_stop_reasons[queue][reason] = 1;
349 else
350 local->q_stop_reasons[queue][reason]++;
351
352 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
353 return;
354
355 if (local->hw.queues < IEEE80211_NUM_ACS)
356 n_acs = 1;
357
358 rcu_read_lock();
359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
360 int ac;
361
362 if (!sdata->dev)
363 continue;
364
365 for (ac = 0; ac < n_acs; ac++) {
366 if (sdata->vif.hw_queue[ac] == queue ||
367 sdata->vif.cab_queue == queue)
368 netif_stop_subqueue(sdata->dev, ac);
369 }
370 }
371 rcu_read_unlock();
372}
373
374void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
376 bool refcounted)
377{
378 struct ieee80211_local *local = hw_to_local(hw);
379 unsigned long flags;
380
381 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
382 __ieee80211_stop_queue(hw, queue, reason, refcounted);
383 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
384}
385
386void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
387{
388 ieee80211_stop_queue_by_reason(hw, queue,
389 IEEE80211_QUEUE_STOP_REASON_DRIVER,
390 false);
391}
392EXPORT_SYMBOL(ieee80211_stop_queue);
393
394void ieee80211_add_pending_skb(struct ieee80211_local *local,
395 struct sk_buff *skb)
396{
397 struct ieee80211_hw *hw = &local->hw;
398 unsigned long flags;
399 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
400 int queue = info->hw_queue;
401
402 if (WARN_ON(!info->control.vif)) {
403 ieee80211_free_txskb(&local->hw, skb);
404 return;
405 }
406
407 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
408 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
409 false);
410 __skb_queue_tail(&local->pending[queue], skb);
411 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
412 false);
413 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
414}
415
416void ieee80211_add_pending_skbs(struct ieee80211_local *local,
417 struct sk_buff_head *skbs)
418{
419 struct ieee80211_hw *hw = &local->hw;
420 struct sk_buff *skb;
421 unsigned long flags;
422 int queue, i;
423
424 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
425 while ((skb = skb_dequeue(skbs))) {
426 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
427
428 if (WARN_ON(!info->control.vif)) {
429 ieee80211_free_txskb(&local->hw, skb);
430 continue;
431 }
432
433 queue = info->hw_queue;
434
435 __ieee80211_stop_queue(hw, queue,
436 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
437 false);
438
439 __skb_queue_tail(&local->pending[queue], skb);
440 }
441
442 for (i = 0; i < hw->queues; i++)
443 __ieee80211_wake_queue(hw, i,
444 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
445 false);
446 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
447}
448
449void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
450 unsigned long queues,
451 enum queue_stop_reason reason,
452 bool refcounted)
453{
454 struct ieee80211_local *local = hw_to_local(hw);
455 unsigned long flags;
456 int i;
457
458 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
459
460 for_each_set_bit(i, &queues, hw->queues)
461 __ieee80211_stop_queue(hw, i, reason, refcounted);
462
463 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
464}
465
466void ieee80211_stop_queues(struct ieee80211_hw *hw)
467{
468 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
469 IEEE80211_QUEUE_STOP_REASON_DRIVER,
470 false);
471}
472EXPORT_SYMBOL(ieee80211_stop_queues);
473
474int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
475{
476 struct ieee80211_local *local = hw_to_local(hw);
477 unsigned long flags;
478 int ret;
479
480 if (WARN_ON(queue >= hw->queues))
481 return true;
482
483 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
484 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
485 &local->queue_stop_reasons[queue]);
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487 return ret;
488}
489EXPORT_SYMBOL(ieee80211_queue_stopped);
490
491void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
492 unsigned long queues,
493 enum queue_stop_reason reason,
494 bool refcounted)
495{
496 struct ieee80211_local *local = hw_to_local(hw);
497 unsigned long flags;
498 int i;
499
500 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
501
502 for_each_set_bit(i, &queues, hw->queues)
503 __ieee80211_wake_queue(hw, i, reason, refcounted);
504
505 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506}
507
508void ieee80211_wake_queues(struct ieee80211_hw *hw)
509{
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
511 IEEE80211_QUEUE_STOP_REASON_DRIVER,
512 false);
513}
514EXPORT_SYMBOL(ieee80211_wake_queues);
515
516static unsigned int
517ieee80211_get_vif_queues(struct ieee80211_local *local,
518 struct ieee80211_sub_if_data *sdata)
519{
520 unsigned int queues;
521
522 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
523 int ac;
524
525 queues = 0;
526
527 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
528 queues |= BIT(sdata->vif.hw_queue[ac]);
529 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
530 queues |= BIT(sdata->vif.cab_queue);
531 } else {
532
533 queues = BIT(local->hw.queues) - 1;
534 }
535
536 return queues;
537}
538
539void __ieee80211_flush_queues(struct ieee80211_local *local,
540 struct ieee80211_sub_if_data *sdata,
541 unsigned int queues, bool drop)
542{
543 if (!local->ops->flush)
544 return;
545
546
547
548
549
550 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
551 queues = ieee80211_get_vif_queues(local, sdata);
552
553 ieee80211_stop_queues_by_reason(&local->hw, queues,
554 IEEE80211_QUEUE_STOP_REASON_FLUSH,
555 false);
556
557 drv_flush(local, sdata, queues, drop);
558
559 ieee80211_wake_queues_by_reason(&local->hw, queues,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH,
561 false);
562}
563
564void ieee80211_flush_queues(struct ieee80211_local *local,
565 struct ieee80211_sub_if_data *sdata, bool drop)
566{
567 __ieee80211_flush_queues(local, sdata, 0, drop);
568}
569
570void ieee80211_stop_vif_queues(struct ieee80211_local *local,
571 struct ieee80211_sub_if_data *sdata,
572 enum queue_stop_reason reason)
573{
574 ieee80211_stop_queues_by_reason(&local->hw,
575 ieee80211_get_vif_queues(local, sdata),
576 reason, true);
577}
578
579void ieee80211_wake_vif_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 enum queue_stop_reason reason)
582{
583 ieee80211_wake_queues_by_reason(&local->hw,
584 ieee80211_get_vif_queues(local, sdata),
585 reason, true);
586}
587
588static void __iterate_interfaces(struct ieee80211_local *local,
589 u32 iter_flags,
590 void (*iterator)(void *data, u8 *mac,
591 struct ieee80211_vif *vif),
592 void *data)
593{
594 struct ieee80211_sub_if_data *sdata;
595 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
596
597 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
598 switch (sdata->vif.type) {
599 case NL80211_IFTYPE_MONITOR:
600 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
601 continue;
602 break;
603 case NL80211_IFTYPE_AP_VLAN:
604 continue;
605 default:
606 break;
607 }
608 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
609 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
610 continue;
611 if (ieee80211_sdata_running(sdata) || !active_only)
612 iterator(data, sdata->vif.addr,
613 &sdata->vif);
614 }
615
616 sdata = rcu_dereference_check(local->monitor_sdata,
617 lockdep_is_held(&local->iflist_mtx) ||
618 lockdep_rtnl_is_held());
619 if (sdata &&
620 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
621 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
622 iterator(data, sdata->vif.addr, &sdata->vif);
623}
624
625void ieee80211_iterate_interfaces(
626 struct ieee80211_hw *hw, u32 iter_flags,
627 void (*iterator)(void *data, u8 *mac,
628 struct ieee80211_vif *vif),
629 void *data)
630{
631 struct ieee80211_local *local = hw_to_local(hw);
632
633 mutex_lock(&local->iflist_mtx);
634 __iterate_interfaces(local, iter_flags, iterator, data);
635 mutex_unlock(&local->iflist_mtx);
636}
637EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
638
639void ieee80211_iterate_active_interfaces_atomic(
640 struct ieee80211_hw *hw, u32 iter_flags,
641 void (*iterator)(void *data, u8 *mac,
642 struct ieee80211_vif *vif),
643 void *data)
644{
645 struct ieee80211_local *local = hw_to_local(hw);
646
647 rcu_read_lock();
648 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
649 iterator, data);
650 rcu_read_unlock();
651}
652EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
653
654void ieee80211_iterate_active_interfaces_rtnl(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
658 void *data)
659{
660 struct ieee80211_local *local = hw_to_local(hw);
661
662 ASSERT_RTNL();
663
664 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
665 iterator, data);
666}
667EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
668
669static void __iterate_stations(struct ieee80211_local *local,
670 void (*iterator)(void *data,
671 struct ieee80211_sta *sta),
672 void *data)
673{
674 struct sta_info *sta;
675
676 list_for_each_entry_rcu(sta, &local->sta_list, list) {
677 if (!sta->uploaded)
678 continue;
679
680 iterator(data, &sta->sta);
681 }
682}
683
684void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
685 void (*iterator)(void *data,
686 struct ieee80211_sta *sta),
687 void *data)
688{
689 struct ieee80211_local *local = hw_to_local(hw);
690
691 rcu_read_lock();
692 __iterate_stations(local, iterator, data);
693 rcu_read_unlock();
694}
695EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
696
697struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
698{
699 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
700
701 if (!ieee80211_sdata_running(sdata) ||
702 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
703 return NULL;
704 return &sdata->vif;
705}
706EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
707
708struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
709{
710 struct ieee80211_sub_if_data *sdata;
711
712 if (!vif)
713 return NULL;
714
715 sdata = vif_to_sdata(vif);
716
717 if (!ieee80211_sdata_running(sdata) ||
718 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
719 return NULL;
720
721 return &sdata->wdev;
722}
723EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
724
725
726
727
728
729
730
731
732
733
734static bool ieee80211_can_queue_work(struct ieee80211_local *local)
735{
736 if (local->quiescing || (local->suspended && !local->resuming)) {
737 pr_warn("queueing ieee80211 work while going to suspend\n");
738 return false;
739 }
740
741 return true;
742}
743
744void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
745{
746 struct ieee80211_local *local = hw_to_local(hw);
747
748 if (!ieee80211_can_queue_work(local))
749 return;
750
751 queue_work(local->workqueue, work);
752}
753EXPORT_SYMBOL(ieee80211_queue_work);
754
755void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
756 struct delayed_work *dwork,
757 unsigned long delay)
758{
759 struct ieee80211_local *local = hw_to_local(hw);
760
761 if (!ieee80211_can_queue_work(local))
762 return;
763
764 queue_delayed_work(local->workqueue, dwork, delay);
765}
766EXPORT_SYMBOL(ieee80211_queue_delayed_work);
767
768u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
769 struct ieee802_11_elems *elems,
770 u64 filter, u32 crc)
771{
772 size_t left = len;
773 const u8 *pos = start;
774 bool calc_crc = filter != 0;
775 DECLARE_BITMAP(seen_elems, 256);
776 const u8 *ie;
777
778 bitmap_zero(seen_elems, 256);
779 memset(elems, 0, sizeof(*elems));
780 elems->ie_start = start;
781 elems->total_len = len;
782
783 while (left >= 2) {
784 u8 id, elen;
785 bool elem_parse_failed;
786
787 id = *pos++;
788 elen = *pos++;
789 left -= 2;
790
791 if (elen > left) {
792 elems->parse_error = true;
793 break;
794 }
795
796 switch (id) {
797 case WLAN_EID_SSID:
798 case WLAN_EID_SUPP_RATES:
799 case WLAN_EID_FH_PARAMS:
800 case WLAN_EID_DS_PARAMS:
801 case WLAN_EID_CF_PARAMS:
802 case WLAN_EID_TIM:
803 case WLAN_EID_IBSS_PARAMS:
804 case WLAN_EID_CHALLENGE:
805 case WLAN_EID_RSN:
806 case WLAN_EID_ERP_INFO:
807 case WLAN_EID_EXT_SUPP_RATES:
808 case WLAN_EID_HT_CAPABILITY:
809 case WLAN_EID_HT_OPERATION:
810 case WLAN_EID_VHT_CAPABILITY:
811 case WLAN_EID_VHT_OPERATION:
812 case WLAN_EID_MESH_ID:
813 case WLAN_EID_MESH_CONFIG:
814 case WLAN_EID_PEER_MGMT:
815 case WLAN_EID_PREQ:
816 case WLAN_EID_PREP:
817 case WLAN_EID_PERR:
818 case WLAN_EID_RANN:
819 case WLAN_EID_CHANNEL_SWITCH:
820 case WLAN_EID_EXT_CHANSWITCH_ANN:
821 case WLAN_EID_COUNTRY:
822 case WLAN_EID_PWR_CONSTRAINT:
823 case WLAN_EID_TIMEOUT_INTERVAL:
824 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
825 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
826 case WLAN_EID_CHAN_SWITCH_PARAM:
827 case WLAN_EID_EXT_CAPABILITY:
828 case WLAN_EID_CHAN_SWITCH_TIMING:
829 case WLAN_EID_LINK_ID:
830
831
832
833
834 if (test_bit(id, seen_elems)) {
835 elems->parse_error = true;
836 left -= elen;
837 pos += elen;
838 continue;
839 }
840 break;
841 }
842
843 if (calc_crc && id < 64 && (filter & (1ULL << id)))
844 crc = crc32_be(crc, pos - 2, elen + 2);
845
846 elem_parse_failed = false;
847
848 switch (id) {
849 case WLAN_EID_LINK_ID:
850 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
851 elem_parse_failed = true;
852 break;
853 }
854 elems->lnk_id = (void *)(pos - 2);
855 break;
856 case WLAN_EID_CHAN_SWITCH_TIMING:
857 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
858 elem_parse_failed = true;
859 break;
860 }
861 elems->ch_sw_timing = (void *)pos;
862 break;
863 case WLAN_EID_EXT_CAPABILITY:
864 elems->ext_capab = pos;
865 elems->ext_capab_len = elen;
866 break;
867 case WLAN_EID_SSID:
868 elems->ssid = pos;
869 elems->ssid_len = elen;
870 break;
871 case WLAN_EID_SUPP_RATES:
872 elems->supp_rates = pos;
873 elems->supp_rates_len = elen;
874 break;
875 case WLAN_EID_DS_PARAMS:
876 if (elen >= 1)
877 elems->ds_params = pos;
878 else
879 elem_parse_failed = true;
880 break;
881 case WLAN_EID_TIM:
882 if (elen >= sizeof(struct ieee80211_tim_ie)) {
883 elems->tim = (void *)pos;
884 elems->tim_len = elen;
885 } else
886 elem_parse_failed = true;
887 break;
888 case WLAN_EID_CHALLENGE:
889 elems->challenge = pos;
890 elems->challenge_len = elen;
891 break;
892 case WLAN_EID_VENDOR_SPECIFIC:
893 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
894 pos[2] == 0xf2) {
895
896
897 if (calc_crc)
898 crc = crc32_be(crc, pos - 2, elen + 2);
899
900 if (elen >= 5 && pos[3] == 2) {
901
902 if (pos[4] == 0) {
903 elems->wmm_info = pos;
904 elems->wmm_info_len = elen;
905 } else if (pos[4] == 1) {
906 elems->wmm_param = pos;
907 elems->wmm_param_len = elen;
908 }
909 }
910 }
911 break;
912 case WLAN_EID_RSN:
913 elems->rsn = pos;
914 elems->rsn_len = elen;
915 break;
916 case WLAN_EID_ERP_INFO:
917 if (elen >= 1)
918 elems->erp_info = pos;
919 else
920 elem_parse_failed = true;
921 break;
922 case WLAN_EID_EXT_SUPP_RATES:
923 elems->ext_supp_rates = pos;
924 elems->ext_supp_rates_len = elen;
925 break;
926 case WLAN_EID_HT_CAPABILITY:
927 if (elen >= sizeof(struct ieee80211_ht_cap))
928 elems->ht_cap_elem = (void *)pos;
929 else
930 elem_parse_failed = true;
931 break;
932 case WLAN_EID_HT_OPERATION:
933 if (elen >= sizeof(struct ieee80211_ht_operation))
934 elems->ht_operation = (void *)pos;
935 else
936 elem_parse_failed = true;
937 break;
938 case WLAN_EID_VHT_CAPABILITY:
939 if (elen >= sizeof(struct ieee80211_vht_cap))
940 elems->vht_cap_elem = (void *)pos;
941 else
942 elem_parse_failed = true;
943 break;
944 case WLAN_EID_VHT_OPERATION:
945 if (elen >= sizeof(struct ieee80211_vht_operation))
946 elems->vht_operation = (void *)pos;
947 else
948 elem_parse_failed = true;
949 break;
950 case WLAN_EID_OPMODE_NOTIF:
951 if (elen > 0)
952 elems->opmode_notif = pos;
953 else
954 elem_parse_failed = true;
955 break;
956 case WLAN_EID_MESH_ID:
957 elems->mesh_id = pos;
958 elems->mesh_id_len = elen;
959 break;
960 case WLAN_EID_MESH_CONFIG:
961 if (elen >= sizeof(struct ieee80211_meshconf_ie))
962 elems->mesh_config = (void *)pos;
963 else
964 elem_parse_failed = true;
965 break;
966 case WLAN_EID_PEER_MGMT:
967 elems->peering = pos;
968 elems->peering_len = elen;
969 break;
970 case WLAN_EID_MESH_AWAKE_WINDOW:
971 if (elen >= 2)
972 elems->awake_window = (void *)pos;
973 break;
974 case WLAN_EID_PREQ:
975 elems->preq = pos;
976 elems->preq_len = elen;
977 break;
978 case WLAN_EID_PREP:
979 elems->prep = pos;
980 elems->prep_len = elen;
981 break;
982 case WLAN_EID_PERR:
983 elems->perr = pos;
984 elems->perr_len = elen;
985 break;
986 case WLAN_EID_RANN:
987 if (elen >= sizeof(struct ieee80211_rann_ie))
988 elems->rann = (void *)pos;
989 else
990 elem_parse_failed = true;
991 break;
992 case WLAN_EID_CHANNEL_SWITCH:
993 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
994 elem_parse_failed = true;
995 break;
996 }
997 elems->ch_switch_ie = (void *)pos;
998 break;
999 case WLAN_EID_EXT_CHANSWITCH_ANN:
1000 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1001 elem_parse_failed = true;
1002 break;
1003 }
1004 elems->ext_chansw_ie = (void *)pos;
1005 break;
1006 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1007 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1008 elem_parse_failed = true;
1009 break;
1010 }
1011 elems->sec_chan_offs = (void *)pos;
1012 break;
1013 case WLAN_EID_CHAN_SWITCH_PARAM:
1014 if (elen !=
1015 sizeof(*elems->mesh_chansw_params_ie)) {
1016 elem_parse_failed = true;
1017 break;
1018 }
1019 elems->mesh_chansw_params_ie = (void *)pos;
1020 break;
1021 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1022 if (!action ||
1023 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1024 elem_parse_failed = true;
1025 break;
1026 }
1027 elems->wide_bw_chansw_ie = (void *)pos;
1028 break;
1029 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1030 if (action) {
1031 elem_parse_failed = true;
1032 break;
1033 }
1034
1035
1036
1037
1038
1039 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1040 pos, elen);
1041 if (ie) {
1042 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1043 elems->wide_bw_chansw_ie =
1044 (void *)(ie + 2);
1045 else
1046 elem_parse_failed = true;
1047 }
1048 break;
1049 case WLAN_EID_COUNTRY:
1050 elems->country_elem = pos;
1051 elems->country_elem_len = elen;
1052 break;
1053 case WLAN_EID_PWR_CONSTRAINT:
1054 if (elen != 1) {
1055 elem_parse_failed = true;
1056 break;
1057 }
1058 elems->pwr_constr_elem = pos;
1059 break;
1060 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1061
1062
1063
1064
1065
1066 if (elen < 4) {
1067 elem_parse_failed = true;
1068 break;
1069 }
1070
1071 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1072 pos[2] != 0x96 || pos[3] != 0x00)
1073 break;
1074
1075 if (elen != 6) {
1076 elem_parse_failed = true;
1077 break;
1078 }
1079
1080 if (calc_crc)
1081 crc = crc32_be(crc, pos - 2, elen + 2);
1082
1083 elems->cisco_dtpc_elem = pos;
1084 break;
1085 case WLAN_EID_TIMEOUT_INTERVAL:
1086 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1087 elems->timeout_int = (void *)pos;
1088 else
1089 elem_parse_failed = true;
1090 break;
1091 default:
1092 break;
1093 }
1094
1095 if (elem_parse_failed)
1096 elems->parse_error = true;
1097 else
1098 __set_bit(id, seen_elems);
1099
1100 left -= elen;
1101 pos += elen;
1102 }
1103
1104 if (left != 0)
1105 elems->parse_error = true;
1106
1107 return crc;
1108}
1109
1110void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1111 bool bss_notify, bool enable_qos)
1112{
1113 struct ieee80211_local *local = sdata->local;
1114 struct ieee80211_tx_queue_params qparam;
1115 struct ieee80211_chanctx_conf *chanctx_conf;
1116 int ac;
1117 bool use_11b;
1118 bool is_ocb;
1119 int aCWmin, aCWmax;
1120
1121 if (!local->ops->conf_tx)
1122 return;
1123
1124 if (local->hw.queues < IEEE80211_NUM_ACS)
1125 return;
1126
1127 memset(&qparam, 0, sizeof(qparam));
1128
1129 rcu_read_lock();
1130 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1131 use_11b = (chanctx_conf &&
1132 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1133 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1134 rcu_read_unlock();
1135
1136 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1137
1138
1139 aCWmax = 1023;
1140 if (use_11b)
1141 aCWmin = 31;
1142 else
1143 aCWmin = 15;
1144
1145
1146 qparam.cw_max = aCWmax;
1147 qparam.cw_min = aCWmin;
1148 qparam.txop = 0;
1149 qparam.aifs = 2;
1150
1151 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1152
1153 if (enable_qos) {
1154 switch (ac) {
1155 case IEEE80211_AC_BK:
1156 qparam.cw_max = aCWmax;
1157 qparam.cw_min = aCWmin;
1158 qparam.txop = 0;
1159 if (is_ocb)
1160 qparam.aifs = 9;
1161 else
1162 qparam.aifs = 7;
1163 break;
1164
1165 default:
1166 case IEEE80211_AC_BE:
1167 qparam.cw_max = aCWmax;
1168 qparam.cw_min = aCWmin;
1169 qparam.txop = 0;
1170 if (is_ocb)
1171 qparam.aifs = 6;
1172 else
1173 qparam.aifs = 3;
1174 break;
1175 case IEEE80211_AC_VI:
1176 qparam.cw_max = aCWmin;
1177 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1178 if (is_ocb)
1179 qparam.txop = 0;
1180 else if (use_11b)
1181 qparam.txop = 6016/32;
1182 else
1183 qparam.txop = 3008/32;
1184
1185 if (is_ocb)
1186 qparam.aifs = 3;
1187 else
1188 qparam.aifs = 2;
1189 break;
1190 case IEEE80211_AC_VO:
1191 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1192 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1193 if (is_ocb)
1194 qparam.txop = 0;
1195 else if (use_11b)
1196 qparam.txop = 3264/32;
1197 else
1198 qparam.txop = 1504/32;
1199 qparam.aifs = 2;
1200 break;
1201 }
1202 }
1203
1204 qparam.uapsd = false;
1205
1206 sdata->tx_conf[ac] = qparam;
1207 drv_conf_tx(local, sdata, ac, &qparam);
1208 }
1209
1210 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1211 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1212 sdata->vif.bss_conf.qos = enable_qos;
1213 if (bss_notify)
1214 ieee80211_bss_info_change_notify(sdata,
1215 BSS_CHANGED_QOS);
1216 }
1217}
1218
1219void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1220 u16 transaction, u16 auth_alg, u16 status,
1221 const u8 *extra, size_t extra_len, const u8 *da,
1222 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1223 u32 tx_flags)
1224{
1225 struct ieee80211_local *local = sdata->local;
1226 struct sk_buff *skb;
1227 struct ieee80211_mgmt *mgmt;
1228 int err;
1229
1230
1231 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1232 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1233 if (!skb)
1234 return;
1235
1236 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1237
1238 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1239 memset(mgmt, 0, 24 + 6);
1240 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1241 IEEE80211_STYPE_AUTH);
1242 memcpy(mgmt->da, da, ETH_ALEN);
1243 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1244 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1245 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1246 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1247 mgmt->u.auth.status_code = cpu_to_le16(status);
1248 if (extra)
1249 memcpy(skb_put(skb, extra_len), extra, extra_len);
1250
1251 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1252 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1253 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1254 WARN_ON(err);
1255 }
1256
1257 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1258 tx_flags;
1259 ieee80211_tx_skb(sdata, skb);
1260}
1261
1262void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1263 const u8 *bssid, u16 stype, u16 reason,
1264 bool send_frame, u8 *frame_buf)
1265{
1266 struct ieee80211_local *local = sdata->local;
1267 struct sk_buff *skb;
1268 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1269
1270
1271 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1272 mgmt->duration = 0;
1273 mgmt->seq_ctrl = 0;
1274 memcpy(mgmt->da, bssid, ETH_ALEN);
1275 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1276 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1277
1278 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1279
1280 if (send_frame) {
1281 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1282 IEEE80211_DEAUTH_FRAME_LEN);
1283 if (!skb)
1284 return;
1285
1286 skb_reserve(skb, local->hw.extra_tx_headroom);
1287
1288
1289 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1290 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1291
1292 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1293 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1294 IEEE80211_SKB_CB(skb)->flags |=
1295 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1296
1297 ieee80211_tx_skb(sdata, skb);
1298 }
1299}
1300
1301static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1302 u8 *buffer, size_t buffer_len,
1303 const u8 *ie, size_t ie_len,
1304 enum ieee80211_band band,
1305 u32 rate_mask,
1306 struct cfg80211_chan_def *chandef,
1307 size_t *offset)
1308{
1309 struct ieee80211_supported_band *sband;
1310 u8 *pos = buffer, *end = buffer + buffer_len;
1311 size_t noffset;
1312 int supp_rates_len, i;
1313 u8 rates[32];
1314 int num_rates;
1315 int ext_rates_len;
1316 int shift;
1317 u32 rate_flags;
1318 bool have_80mhz = false;
1319
1320 *offset = 0;
1321
1322 sband = local->hw.wiphy->bands[band];
1323 if (WARN_ON_ONCE(!sband))
1324 return 0;
1325
1326 rate_flags = ieee80211_chandef_rate_flags(chandef);
1327 shift = ieee80211_chandef_get_shift(chandef);
1328
1329 num_rates = 0;
1330 for (i = 0; i < sband->n_bitrates; i++) {
1331 if ((BIT(i) & rate_mask) == 0)
1332 continue;
1333 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1334 continue;
1335
1336 rates[num_rates++] =
1337 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1338 (1 << shift) * 5);
1339 }
1340
1341 supp_rates_len = min_t(int, num_rates, 8);
1342
1343 if (end - pos < 2 + supp_rates_len)
1344 goto out_err;
1345 *pos++ = WLAN_EID_SUPP_RATES;
1346 *pos++ = supp_rates_len;
1347 memcpy(pos, rates, supp_rates_len);
1348 pos += supp_rates_len;
1349
1350
1351 if (ie && ie_len) {
1352 static const u8 before_extrates[] = {
1353 WLAN_EID_SSID,
1354 WLAN_EID_SUPP_RATES,
1355 WLAN_EID_REQUEST,
1356 };
1357 noffset = ieee80211_ie_split(ie, ie_len,
1358 before_extrates,
1359 ARRAY_SIZE(before_extrates),
1360 *offset);
1361 if (end - pos < noffset - *offset)
1362 goto out_err;
1363 memcpy(pos, ie + *offset, noffset - *offset);
1364 pos += noffset - *offset;
1365 *offset = noffset;
1366 }
1367
1368 ext_rates_len = num_rates - supp_rates_len;
1369 if (ext_rates_len > 0) {
1370 if (end - pos < 2 + ext_rates_len)
1371 goto out_err;
1372 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1373 *pos++ = ext_rates_len;
1374 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1375 pos += ext_rates_len;
1376 }
1377
1378 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1379 if (end - pos < 3)
1380 goto out_err;
1381 *pos++ = WLAN_EID_DS_PARAMS;
1382 *pos++ = 1;
1383 *pos++ = ieee80211_frequency_to_channel(
1384 chandef->chan->center_freq);
1385 }
1386
1387
1388 if (ie && ie_len) {
1389 static const u8 before_ht[] = {
1390 WLAN_EID_SSID,
1391 WLAN_EID_SUPP_RATES,
1392 WLAN_EID_REQUEST,
1393 WLAN_EID_EXT_SUPP_RATES,
1394 WLAN_EID_DS_PARAMS,
1395 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1396 };
1397 noffset = ieee80211_ie_split(ie, ie_len,
1398 before_ht, ARRAY_SIZE(before_ht),
1399 *offset);
1400 if (end - pos < noffset - *offset)
1401 goto out_err;
1402 memcpy(pos, ie + *offset, noffset - *offset);
1403 pos += noffset - *offset;
1404 *offset = noffset;
1405 }
1406
1407 if (sband->ht_cap.ht_supported) {
1408 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1409 goto out_err;
1410 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1411 sband->ht_cap.cap);
1412 }
1413
1414
1415
1416
1417
1418
1419
1420 if (ie && ie_len) {
1421 static const u8 before_vht[] = {
1422 WLAN_EID_SSID,
1423 WLAN_EID_SUPP_RATES,
1424 WLAN_EID_REQUEST,
1425 WLAN_EID_EXT_SUPP_RATES,
1426 WLAN_EID_DS_PARAMS,
1427 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1428 WLAN_EID_HT_CAPABILITY,
1429 WLAN_EID_BSS_COEX_2040,
1430 WLAN_EID_EXT_CAPABILITY,
1431 WLAN_EID_SSID_LIST,
1432 WLAN_EID_CHANNEL_USAGE,
1433 WLAN_EID_INTERWORKING,
1434
1435
1436 };
1437 noffset = ieee80211_ie_split(ie, ie_len,
1438 before_vht, ARRAY_SIZE(before_vht),
1439 *offset);
1440 if (end - pos < noffset - *offset)
1441 goto out_err;
1442 memcpy(pos, ie + *offset, noffset - *offset);
1443 pos += noffset - *offset;
1444 *offset = noffset;
1445 }
1446
1447
1448 for (i = 0; i < sband->n_channels; i++) {
1449 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1450 IEEE80211_CHAN_NO_80MHZ))
1451 continue;
1452
1453 have_80mhz = true;
1454 break;
1455 }
1456
1457 if (sband->vht_cap.vht_supported && have_80mhz) {
1458 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1459 goto out_err;
1460 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1461 sband->vht_cap.cap);
1462 }
1463
1464 return pos - buffer;
1465 out_err:
1466 WARN_ONCE(1, "not enough space for preq IEs\n");
1467 return pos - buffer;
1468}
1469
1470int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1471 size_t buffer_len,
1472 struct ieee80211_scan_ies *ie_desc,
1473 const u8 *ie, size_t ie_len,
1474 u8 bands_used, u32 *rate_masks,
1475 struct cfg80211_chan_def *chandef)
1476{
1477 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1478 int i;
1479
1480 memset(ie_desc, 0, sizeof(*ie_desc));
1481
1482 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1483 if (bands_used & BIT(i)) {
1484 pos += ieee80211_build_preq_ies_band(local,
1485 buffer + pos,
1486 buffer_len - pos,
1487 ie, ie_len, i,
1488 rate_masks[i],
1489 chandef,
1490 &custom_ie_offset);
1491 ie_desc->ies[i] = buffer + old_pos;
1492 ie_desc->len[i] = pos - old_pos;
1493 old_pos = pos;
1494 }
1495 }
1496
1497
1498 if (ie && ie_len) {
1499 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1500 "not enough space for preq custom IEs\n"))
1501 return pos;
1502 memcpy(buffer + pos, ie + custom_ie_offset,
1503 ie_len - custom_ie_offset);
1504 ie_desc->common_ies = buffer + pos;
1505 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1506 pos += ie_len - custom_ie_offset;
1507 }
1508
1509 return pos;
1510};
1511
1512struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1513 const u8 *src, const u8 *dst,
1514 u32 ratemask,
1515 struct ieee80211_channel *chan,
1516 const u8 *ssid, size_t ssid_len,
1517 const u8 *ie, size_t ie_len,
1518 bool directed)
1519{
1520 struct ieee80211_local *local = sdata->local;
1521 struct cfg80211_chan_def chandef;
1522 struct sk_buff *skb;
1523 struct ieee80211_mgmt *mgmt;
1524 int ies_len;
1525 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1526 struct ieee80211_scan_ies dummy_ie_desc;
1527
1528
1529
1530
1531
1532
1533 chandef.width = sdata->vif.bss_conf.chandef.width;
1534 if (directed)
1535 chandef.chan = NULL;
1536 else
1537 chandef.chan = chan;
1538
1539 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1540 100 + ie_len);
1541 if (!skb)
1542 return NULL;
1543
1544 rate_masks[chan->band] = ratemask;
1545 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1546 skb_tailroom(skb), &dummy_ie_desc,
1547 ie, ie_len, BIT(chan->band),
1548 rate_masks, &chandef);
1549 skb_put(skb, ies_len);
1550
1551 if (dst) {
1552 mgmt = (struct ieee80211_mgmt *) skb->data;
1553 memcpy(mgmt->da, dst, ETH_ALEN);
1554 memcpy(mgmt->bssid, dst, ETH_ALEN);
1555 }
1556
1557 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1558
1559 return skb;
1560}
1561
1562void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1563 const u8 *src, const u8 *dst,
1564 const u8 *ssid, size_t ssid_len,
1565 const u8 *ie, size_t ie_len,
1566 u32 ratemask, bool directed, u32 tx_flags,
1567 struct ieee80211_channel *channel, bool scan)
1568{
1569 struct sk_buff *skb;
1570
1571 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1572 ssid, ssid_len,
1573 ie, ie_len, directed);
1574 if (skb) {
1575 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1576 if (scan)
1577 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1578 else
1579 ieee80211_tx_skb(sdata, skb);
1580 }
1581}
1582
1583u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1584 struct ieee802_11_elems *elems,
1585 enum ieee80211_band band, u32 *basic_rates)
1586{
1587 struct ieee80211_supported_band *sband;
1588 size_t num_rates;
1589 u32 supp_rates, rate_flags;
1590 int i, j, shift;
1591 sband = sdata->local->hw.wiphy->bands[band];
1592
1593 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1594 shift = ieee80211_vif_get_shift(&sdata->vif);
1595
1596 if (WARN_ON(!sband))
1597 return 1;
1598
1599 num_rates = sband->n_bitrates;
1600 supp_rates = 0;
1601 for (i = 0; i < elems->supp_rates_len +
1602 elems->ext_supp_rates_len; i++) {
1603 u8 rate = 0;
1604 int own_rate;
1605 bool is_basic;
1606 if (i < elems->supp_rates_len)
1607 rate = elems->supp_rates[i];
1608 else if (elems->ext_supp_rates)
1609 rate = elems->ext_supp_rates
1610 [i - elems->supp_rates_len];
1611 own_rate = 5 * (rate & 0x7f);
1612 is_basic = !!(rate & 0x80);
1613
1614 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1615 continue;
1616
1617 for (j = 0; j < num_rates; j++) {
1618 int brate;
1619 if ((rate_flags & sband->bitrates[j].flags)
1620 != rate_flags)
1621 continue;
1622
1623 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1624 1 << shift);
1625
1626 if (brate == own_rate) {
1627 supp_rates |= BIT(j);
1628 if (basic_rates && is_basic)
1629 *basic_rates |= BIT(j);
1630 }
1631 }
1632 }
1633 return supp_rates;
1634}
1635
1636void ieee80211_stop_device(struct ieee80211_local *local)
1637{
1638 ieee80211_led_radio(local, false);
1639 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1640
1641 cancel_work_sync(&local->reconfig_filter);
1642
1643 flush_workqueue(local->workqueue);
1644 drv_stop(local);
1645}
1646
1647static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1648 bool aborted)
1649{
1650
1651
1652
1653
1654
1655
1656
1657 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1658
1659
1660
1661
1662
1663 if (aborted)
1664 set_bit(SCAN_ABORTED, &local->scanning);
1665 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1666 flush_delayed_work(&local->scan_work);
1667 }
1668}
1669
1670static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1671{
1672 struct ieee80211_sub_if_data *sdata;
1673 struct ieee80211_chanctx *ctx;
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685 local->resuming = false;
1686 local->suspended = false;
1687 local->in_reconfig = false;
1688
1689 ieee80211_flush_completed_scan(local, true);
1690
1691
1692
1693
1694 ieee80211_sched_scan_end(local);
1695
1696 list_for_each_entry(sdata, &local->interfaces, list)
1697 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1698
1699
1700
1701
1702 mutex_lock(&local->chanctx_mtx);
1703 list_for_each_entry(ctx, &local->chanctx_list, list)
1704 ctx->driver_present = false;
1705 mutex_unlock(&local->chanctx_mtx);
1706
1707 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1708}
1709
1710static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1711 struct ieee80211_sub_if_data *sdata)
1712{
1713 struct ieee80211_chanctx_conf *conf;
1714 struct ieee80211_chanctx *ctx;
1715
1716 if (!local->use_chanctx)
1717 return;
1718
1719 mutex_lock(&local->chanctx_mtx);
1720 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1721 lockdep_is_held(&local->chanctx_mtx));
1722 if (conf) {
1723 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1724 drv_assign_vif_chanctx(local, sdata, ctx);
1725 }
1726 mutex_unlock(&local->chanctx_mtx);
1727}
1728
1729static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1730{
1731 struct ieee80211_local *local = sdata->local;
1732 struct sta_info *sta;
1733
1734
1735 mutex_lock(&local->sta_mtx);
1736 list_for_each_entry(sta, &local->sta_list, list) {
1737 enum ieee80211_sta_state state;
1738
1739 if (!sta->uploaded || sta->sdata != sdata)
1740 continue;
1741
1742 for (state = IEEE80211_STA_NOTEXIST;
1743 state < sta->sta_state; state++)
1744 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1745 state + 1));
1746 }
1747 mutex_unlock(&local->sta_mtx);
1748}
1749
1750int ieee80211_reconfig(struct ieee80211_local *local)
1751{
1752 struct ieee80211_hw *hw = &local->hw;
1753 struct ieee80211_sub_if_data *sdata;
1754 struct ieee80211_chanctx *ctx;
1755 struct sta_info *sta;
1756 int res, i;
1757 bool reconfig_due_to_wowlan = false;
1758 struct ieee80211_sub_if_data *sched_scan_sdata;
1759 struct cfg80211_sched_scan_request *sched_scan_req;
1760 bool sched_scan_stopped = false;
1761 bool suspended = local->suspended;
1762
1763
1764 if (!local->open_count)
1765 goto wake_up;
1766
1767#ifdef CONFIG_PM
1768 if (suspended)
1769 local->resuming = true;
1770
1771 if (local->wowlan) {
1772
1773
1774
1775
1776
1777
1778 local->suspended = false;
1779 res = drv_resume(local);
1780 local->wowlan = false;
1781 if (res < 0) {
1782 local->resuming = false;
1783 return res;
1784 }
1785 if (res == 0)
1786 goto wake_up;
1787 WARN_ON(res > 1);
1788
1789
1790
1791
1792
1793 reconfig_due_to_wowlan = true;
1794 local->suspended = true;
1795 }
1796#endif
1797
1798
1799
1800
1801
1802
1803
1804
1805 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1806 cancel_work_sync(&local->restart_work);
1807
1808 local->started = false;
1809
1810
1811
1812
1813
1814
1815
1816 res = drv_start(local);
1817 if (res) {
1818 if (suspended)
1819 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1820 else
1821 WARN(1, "Hardware became unavailable during restart.\n");
1822 ieee80211_handle_reconfig_failure(local);
1823 return res;
1824 }
1825
1826
1827 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1828
1829
1830 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1831
1832
1833 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1834
1835 ieee80211_led_radio(local, true);
1836 ieee80211_mod_tpt_led_trig(local,
1837 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1838
1839
1840 sdata = rtnl_dereference(local->monitor_sdata);
1841 if (sdata) {
1842
1843 WARN_ON(local->resuming);
1844 res = drv_add_interface(local, sdata);
1845 if (WARN_ON(res)) {
1846 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1847 synchronize_net();
1848 kfree(sdata);
1849 }
1850 }
1851
1852 list_for_each_entry(sdata, &local->interfaces, list) {
1853 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1854 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1855 ieee80211_sdata_running(sdata)) {
1856 res = drv_add_interface(local, sdata);
1857 if (WARN_ON(res))
1858 break;
1859 }
1860 }
1861
1862
1863
1864
1865 if (res) {
1866 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1867 list)
1868 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1869 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1870 ieee80211_sdata_running(sdata))
1871 drv_remove_interface(local, sdata);
1872 ieee80211_handle_reconfig_failure(local);
1873 return res;
1874 }
1875
1876
1877 if (local->use_chanctx) {
1878 mutex_lock(&local->chanctx_mtx);
1879 list_for_each_entry(ctx, &local->chanctx_list, list)
1880 if (ctx->replace_state !=
1881 IEEE80211_CHANCTX_REPLACES_OTHER)
1882 WARN_ON(drv_add_chanctx(local, ctx));
1883 mutex_unlock(&local->chanctx_mtx);
1884
1885 sdata = rtnl_dereference(local->monitor_sdata);
1886 if (sdata && ieee80211_sdata_running(sdata))
1887 ieee80211_assign_chanctx(local, sdata);
1888 }
1889
1890
1891 ieee80211_hw_config(local, ~0);
1892
1893 ieee80211_configure_filter(local);
1894
1895
1896 list_for_each_entry(sdata, &local->interfaces, list) {
1897 u32 changed;
1898
1899 if (!ieee80211_sdata_running(sdata))
1900 continue;
1901
1902 ieee80211_assign_chanctx(local, sdata);
1903
1904 switch (sdata->vif.type) {
1905 case NL80211_IFTYPE_AP_VLAN:
1906 case NL80211_IFTYPE_MONITOR:
1907 break;
1908 default:
1909 ieee80211_reconfig_stations(sdata);
1910
1911 case NL80211_IFTYPE_AP:
1912 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1913 drv_conf_tx(local, sdata, i,
1914 &sdata->tx_conf[i]);
1915 break;
1916 }
1917
1918
1919 changed = BSS_CHANGED_ERP_CTS_PROT |
1920 BSS_CHANGED_ERP_PREAMBLE |
1921 BSS_CHANGED_ERP_SLOT |
1922 BSS_CHANGED_HT |
1923 BSS_CHANGED_BASIC_RATES |
1924 BSS_CHANGED_BEACON_INT |
1925 BSS_CHANGED_BSSID |
1926 BSS_CHANGED_CQM |
1927 BSS_CHANGED_QOS |
1928 BSS_CHANGED_IDLE |
1929 BSS_CHANGED_TXPOWER;
1930
1931 if (sdata->vif.mu_mimo_owner)
1932 changed |= BSS_CHANGED_MU_GROUPS;
1933
1934 switch (sdata->vif.type) {
1935 case NL80211_IFTYPE_STATION:
1936 changed |= BSS_CHANGED_ASSOC |
1937 BSS_CHANGED_ARP_FILTER |
1938 BSS_CHANGED_PS;
1939
1940
1941 if (sdata->u.mgd.have_beacon)
1942 changed |= BSS_CHANGED_BEACON_INFO;
1943
1944 sdata_lock(sdata);
1945 ieee80211_bss_info_change_notify(sdata, changed);
1946 sdata_unlock(sdata);
1947 break;
1948 case NL80211_IFTYPE_OCB:
1949 changed |= BSS_CHANGED_OCB;
1950 ieee80211_bss_info_change_notify(sdata, changed);
1951 break;
1952 case NL80211_IFTYPE_ADHOC:
1953 changed |= BSS_CHANGED_IBSS;
1954
1955 case NL80211_IFTYPE_AP:
1956 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1957
1958 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1959 changed |= BSS_CHANGED_AP_PROBE_RESP;
1960
1961 if (rcu_access_pointer(sdata->u.ap.beacon))
1962 drv_start_ap(local, sdata);
1963 }
1964
1965
1966 case NL80211_IFTYPE_MESH_POINT:
1967 if (sdata->vif.bss_conf.enable_beacon) {
1968 changed |= BSS_CHANGED_BEACON |
1969 BSS_CHANGED_BEACON_ENABLED;
1970 ieee80211_bss_info_change_notify(sdata, changed);
1971 }
1972 break;
1973 case NL80211_IFTYPE_WDS:
1974 case NL80211_IFTYPE_AP_VLAN:
1975 case NL80211_IFTYPE_MONITOR:
1976 case NL80211_IFTYPE_P2P_DEVICE:
1977
1978 break;
1979 case NL80211_IFTYPE_UNSPECIFIED:
1980 case NUM_NL80211_IFTYPES:
1981 case NL80211_IFTYPE_P2P_CLIENT:
1982 case NL80211_IFTYPE_P2P_GO:
1983 WARN_ON(1);
1984 break;
1985 }
1986 }
1987
1988 ieee80211_recalc_ps(local);
1989
1990
1991
1992
1993
1994
1995
1996 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1997 list_for_each_entry(sdata, &local->interfaces, list) {
1998 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1999 continue;
2000 if (!sdata->u.mgd.associated)
2001 continue;
2002
2003 ieee80211_send_nullfunc(local, sdata, false);
2004 }
2005 }
2006
2007
2008 mutex_lock(&local->sta_mtx);
2009 list_for_each_entry(sta, &local->sta_list, list) {
2010 enum ieee80211_sta_state state;
2011
2012 if (!sta->uploaded)
2013 continue;
2014
2015 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2016 continue;
2017
2018 for (state = IEEE80211_STA_NOTEXIST;
2019 state < sta->sta_state; state++)
2020 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2021 state + 1));
2022 }
2023 mutex_unlock(&local->sta_mtx);
2024
2025
2026 list_for_each_entry(sdata, &local->interfaces, list)
2027 ieee80211_reset_crypto_tx_tailroom(sdata);
2028
2029 list_for_each_entry(sdata, &local->interfaces, list)
2030 if (ieee80211_sdata_running(sdata))
2031 ieee80211_enable_keys(sdata);
2032
2033
2034 mutex_lock(&local->mtx);
2035 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2036 lockdep_is_held(&local->mtx));
2037 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2038 lockdep_is_held(&local->mtx));
2039 if (sched_scan_sdata && sched_scan_req)
2040
2041
2042
2043
2044
2045
2046
2047 if (sched_scan_req->n_scan_plans > 1 ||
2048 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2049 sched_scan_req)) {
2050 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2051 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2052 sched_scan_stopped = true;
2053 }
2054 mutex_unlock(&local->mtx);
2055
2056 if (sched_scan_stopped)
2057 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2058
2059 wake_up:
2060 if (local->in_reconfig) {
2061 local->in_reconfig = false;
2062 barrier();
2063
2064
2065 mutex_lock(&local->mtx);
2066 ieee80211_start_next_roc(local);
2067 mutex_unlock(&local->mtx);
2068 }
2069
2070 if (local->monitors == local->open_count && local->monitors > 0)
2071 ieee80211_add_virtual_monitor(local);
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2084 mutex_lock(&local->sta_mtx);
2085
2086 list_for_each_entry(sta, &local->sta_list, list) {
2087 if (!local->resuming)
2088 ieee80211_sta_tear_down_BA_sessions(
2089 sta, AGG_STOP_LOCAL_REQUEST);
2090 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2091 }
2092
2093 mutex_unlock(&local->sta_mtx);
2094 }
2095
2096 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2097 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2098 false);
2099
2100
2101
2102
2103
2104 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2105 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2106
2107 if (!suspended)
2108 return 0;
2109
2110#ifdef CONFIG_PM
2111
2112 local->suspended = false;
2113 mb();
2114 local->resuming = false;
2115
2116 ieee80211_flush_completed_scan(local, false);
2117
2118 if (local->open_count && !reconfig_due_to_wowlan)
2119 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2120
2121 list_for_each_entry(sdata, &local->interfaces, list) {
2122 if (!ieee80211_sdata_running(sdata))
2123 continue;
2124 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2125 ieee80211_sta_restart(sdata);
2126 }
2127
2128 mod_timer(&local->sta_cleanup, jiffies + 1);
2129#else
2130 WARN_ON(1);
2131#endif
2132
2133 return 0;
2134}
2135
2136void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2137{
2138 struct ieee80211_sub_if_data *sdata;
2139 struct ieee80211_local *local;
2140 struct ieee80211_key *key;
2141
2142 if (WARN_ON(!vif))
2143 return;
2144
2145 sdata = vif_to_sdata(vif);
2146 local = sdata->local;
2147
2148 if (WARN_ON(!local->resuming))
2149 return;
2150
2151 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2152 return;
2153
2154 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2155
2156 mutex_lock(&local->key_mtx);
2157 list_for_each_entry(key, &sdata->key_list, list)
2158 key->flags |= KEY_FLAG_TAINTED;
2159 mutex_unlock(&local->key_mtx);
2160}
2161EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2162
2163void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2164{
2165 struct ieee80211_local *local = sdata->local;
2166 struct ieee80211_chanctx_conf *chanctx_conf;
2167 struct ieee80211_chanctx *chanctx;
2168
2169 mutex_lock(&local->chanctx_mtx);
2170
2171 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2172 lockdep_is_held(&local->chanctx_mtx));
2173
2174
2175
2176
2177
2178
2179
2180 if (!chanctx_conf)
2181 goto unlock;
2182
2183 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2184 ieee80211_recalc_smps_chanctx(local, chanctx);
2185 unlock:
2186 mutex_unlock(&local->chanctx_mtx);
2187}
2188
2189void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2190{
2191 struct ieee80211_local *local = sdata->local;
2192 struct ieee80211_chanctx_conf *chanctx_conf;
2193 struct ieee80211_chanctx *chanctx;
2194
2195 mutex_lock(&local->chanctx_mtx);
2196
2197 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2198 lockdep_is_held(&local->chanctx_mtx));
2199
2200 if (WARN_ON_ONCE(!chanctx_conf))
2201 goto unlock;
2202
2203 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2204 ieee80211_recalc_chanctx_min_def(local, chanctx);
2205 unlock:
2206 mutex_unlock(&local->chanctx_mtx);
2207}
2208
2209size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2210{
2211 size_t pos = offset;
2212
2213 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2214 pos += 2 + ies[pos + 1];
2215
2216 return pos;
2217}
2218
2219static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2220 int rssi_min_thold,
2221 int rssi_max_thold)
2222{
2223 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2224
2225 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2226 return;
2227
2228
2229
2230
2231
2232
2233 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2234 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2235}
2236
2237void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2238 int rssi_min_thold,
2239 int rssi_max_thold)
2240{
2241 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2242
2243 WARN_ON(rssi_min_thold == rssi_max_thold ||
2244 rssi_min_thold > rssi_max_thold);
2245
2246 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2247 rssi_max_thold);
2248}
2249EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2250
2251void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2252{
2253 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2254
2255 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2256}
2257EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2258
2259u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2260 u16 cap)
2261{
2262 __le16 tmp;
2263
2264 *pos++ = WLAN_EID_HT_CAPABILITY;
2265 *pos++ = sizeof(struct ieee80211_ht_cap);
2266 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2267
2268
2269 tmp = cpu_to_le16(cap);
2270 memcpy(pos, &tmp, sizeof(u16));
2271 pos += sizeof(u16);
2272
2273
2274 *pos++ = ht_cap->ampdu_factor |
2275 (ht_cap->ampdu_density <<
2276 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2277
2278
2279 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2280 pos += sizeof(ht_cap->mcs);
2281
2282
2283 pos += sizeof(__le16);
2284
2285
2286 pos += sizeof(__le32);
2287
2288
2289 pos += sizeof(u8);
2290
2291 return pos;
2292}
2293
2294u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2295 u32 cap)
2296{
2297 __le32 tmp;
2298
2299 *pos++ = WLAN_EID_VHT_CAPABILITY;
2300 *pos++ = sizeof(struct ieee80211_vht_cap);
2301 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2302
2303
2304 tmp = cpu_to_le32(cap);
2305 memcpy(pos, &tmp, sizeof(u32));
2306 pos += sizeof(u32);
2307
2308
2309 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2310 pos += sizeof(vht_cap->vht_mcs);
2311
2312 return pos;
2313}
2314
2315u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2316 const struct cfg80211_chan_def *chandef,
2317 u16 prot_mode, bool rifs_mode)
2318{
2319 struct ieee80211_ht_operation *ht_oper;
2320
2321 *pos++ = WLAN_EID_HT_OPERATION;
2322 *pos++ = sizeof(struct ieee80211_ht_operation);
2323 ht_oper = (struct ieee80211_ht_operation *)pos;
2324 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2325 chandef->chan->center_freq);
2326 switch (chandef->width) {
2327 case NL80211_CHAN_WIDTH_160:
2328 case NL80211_CHAN_WIDTH_80P80:
2329 case NL80211_CHAN_WIDTH_80:
2330 case NL80211_CHAN_WIDTH_40:
2331 if (chandef->center_freq1 > chandef->chan->center_freq)
2332 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2333 else
2334 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2335 break;
2336 default:
2337 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2338 break;
2339 }
2340 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2341 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2342 chandef->width != NL80211_CHAN_WIDTH_20)
2343 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2344
2345 if (rifs_mode)
2346 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2347
2348 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2349 ht_oper->stbc_param = 0x0000;
2350
2351
2352
2353 memset(&ht_oper->basic_set, 0, 16);
2354 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2355
2356 return pos + sizeof(struct ieee80211_ht_operation);
2357}
2358
2359u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2360 const struct cfg80211_chan_def *chandef)
2361{
2362 struct ieee80211_vht_operation *vht_oper;
2363
2364 *pos++ = WLAN_EID_VHT_OPERATION;
2365 *pos++ = sizeof(struct ieee80211_vht_operation);
2366 vht_oper = (struct ieee80211_vht_operation *)pos;
2367 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2368 chandef->center_freq1);
2369 if (chandef->center_freq2)
2370 vht_oper->center_freq_seg2_idx =
2371 ieee80211_frequency_to_channel(chandef->center_freq2);
2372 else
2373 vht_oper->center_freq_seg2_idx = 0x00;
2374
2375 switch (chandef->width) {
2376 case NL80211_CHAN_WIDTH_160:
2377
2378
2379
2380
2381 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2382 vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx;
2383 if (chandef->chan->center_freq < chandef->center_freq1)
2384 vht_oper->center_freq_seg1_idx -= 8;
2385 else
2386 vht_oper->center_freq_seg1_idx += 8;
2387 break;
2388 case NL80211_CHAN_WIDTH_80P80:
2389
2390
2391
2392
2393 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2394 break;
2395 case NL80211_CHAN_WIDTH_80:
2396 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2397 break;
2398 default:
2399 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2400 break;
2401 }
2402
2403
2404 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2405
2406 return pos + sizeof(struct ieee80211_vht_operation);
2407}
2408
2409bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2410 struct cfg80211_chan_def *chandef)
2411{
2412 enum nl80211_channel_type channel_type;
2413
2414 if (!ht_oper)
2415 return false;
2416
2417 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2418 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2419 channel_type = NL80211_CHAN_HT20;
2420 break;
2421 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2422 channel_type = NL80211_CHAN_HT40PLUS;
2423 break;
2424 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2425 channel_type = NL80211_CHAN_HT40MINUS;
2426 break;
2427 default:
2428 channel_type = NL80211_CHAN_NO_HT;
2429 return false;
2430 }
2431
2432 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2433 return true;
2434}
2435
2436bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2437 struct cfg80211_chan_def *chandef)
2438{
2439 struct cfg80211_chan_def new = *chandef;
2440 int cf1, cf2;
2441
2442 if (!oper)
2443 return false;
2444
2445 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2446 chandef->chan->band);
2447 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2448 chandef->chan->band);
2449
2450 switch (oper->chan_width) {
2451 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2452 break;
2453 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2454 new.width = NL80211_CHAN_WIDTH_80;
2455 new.center_freq1 = cf1;
2456
2457 if (oper->center_freq_seg2_idx) {
2458 unsigned int diff;
2459
2460 diff = abs(oper->center_freq_seg2_idx -
2461 oper->center_freq_seg1_idx);
2462 if (diff == 8) {
2463 new.width = NL80211_CHAN_WIDTH_160;
2464 new.center_freq1 = cf2;
2465 } else if (diff > 8) {
2466 new.width = NL80211_CHAN_WIDTH_80P80;
2467 new.center_freq2 = cf2;
2468 }
2469 }
2470 break;
2471 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2472 new.width = NL80211_CHAN_WIDTH_160;
2473 new.center_freq1 = cf1;
2474 break;
2475 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2476 new.width = NL80211_CHAN_WIDTH_80P80;
2477 new.center_freq1 = cf1;
2478 new.center_freq2 = cf2;
2479 break;
2480 default:
2481 return false;
2482 }
2483
2484 if (!cfg80211_chandef_valid(&new))
2485 return false;
2486
2487 *chandef = new;
2488 return true;
2489}
2490
2491int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2492 const struct ieee80211_supported_band *sband,
2493 const u8 *srates, int srates_len, u32 *rates)
2494{
2495 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2496 int shift = ieee80211_chandef_get_shift(chandef);
2497 struct ieee80211_rate *br;
2498 int brate, rate, i, j, count = 0;
2499
2500 *rates = 0;
2501
2502 for (i = 0; i < srates_len; i++) {
2503 rate = srates[i] & 0x7f;
2504
2505 for (j = 0; j < sband->n_bitrates; j++) {
2506 br = &sband->bitrates[j];
2507 if ((rate_flags & br->flags) != rate_flags)
2508 continue;
2509
2510 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2511 if (brate == rate) {
2512 *rates |= BIT(j);
2513 count++;
2514 break;
2515 }
2516 }
2517 }
2518 return count;
2519}
2520
2521int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2522 struct sk_buff *skb, bool need_basic,
2523 enum ieee80211_band band)
2524{
2525 struct ieee80211_local *local = sdata->local;
2526 struct ieee80211_supported_band *sband;
2527 int rate, shift;
2528 u8 i, rates, *pos;
2529 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2530 u32 rate_flags;
2531
2532 shift = ieee80211_vif_get_shift(&sdata->vif);
2533 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2534 sband = local->hw.wiphy->bands[band];
2535 rates = 0;
2536 for (i = 0; i < sband->n_bitrates; i++) {
2537 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2538 continue;
2539 rates++;
2540 }
2541 if (rates > 8)
2542 rates = 8;
2543
2544 if (skb_tailroom(skb) < rates + 2)
2545 return -ENOMEM;
2546
2547 pos = skb_put(skb, rates + 2);
2548 *pos++ = WLAN_EID_SUPP_RATES;
2549 *pos++ = rates;
2550 for (i = 0; i < rates; i++) {
2551 u8 basic = 0;
2552 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2553 continue;
2554
2555 if (need_basic && basic_rates & BIT(i))
2556 basic = 0x80;
2557 rate = sband->bitrates[i].bitrate;
2558 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2559 5 * (1 << shift));
2560 *pos++ = basic | (u8) rate;
2561 }
2562
2563 return 0;
2564}
2565
2566int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2567 struct sk_buff *skb, bool need_basic,
2568 enum ieee80211_band band)
2569{
2570 struct ieee80211_local *local = sdata->local;
2571 struct ieee80211_supported_band *sband;
2572 int rate, shift;
2573 u8 i, exrates, *pos;
2574 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2575 u32 rate_flags;
2576
2577 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2578 shift = ieee80211_vif_get_shift(&sdata->vif);
2579
2580 sband = local->hw.wiphy->bands[band];
2581 exrates = 0;
2582 for (i = 0; i < sband->n_bitrates; i++) {
2583 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2584 continue;
2585 exrates++;
2586 }
2587
2588 if (exrates > 8)
2589 exrates -= 8;
2590 else
2591 exrates = 0;
2592
2593 if (skb_tailroom(skb) < exrates + 2)
2594 return -ENOMEM;
2595
2596 if (exrates) {
2597 pos = skb_put(skb, exrates + 2);
2598 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2599 *pos++ = exrates;
2600 for (i = 8; i < sband->n_bitrates; i++) {
2601 u8 basic = 0;
2602 if ((rate_flags & sband->bitrates[i].flags)
2603 != rate_flags)
2604 continue;
2605 if (need_basic && basic_rates & BIT(i))
2606 basic = 0x80;
2607 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2608 5 * (1 << shift));
2609 *pos++ = basic | (u8) rate;
2610 }
2611 }
2612 return 0;
2613}
2614
2615int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2616{
2617 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2618 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2619
2620 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2621
2622 return 0;
2623 }
2624 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2625}
2626EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2627
2628u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2629{
2630 if (!mcs)
2631 return 1;
2632
2633
2634
2635 if (mcs->rx_mask[3])
2636 return 4;
2637 if (mcs->rx_mask[2])
2638 return 3;
2639 if (mcs->rx_mask[1])
2640 return 2;
2641 return 1;
2642}
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2656 struct ieee80211_rx_status *status,
2657 unsigned int mpdu_len,
2658 unsigned int mpdu_offset)
2659{
2660 u64 ts = status->mactime;
2661 struct rate_info ri;
2662 u16 rate;
2663
2664 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2665 return 0;
2666
2667 memset(&ri, 0, sizeof(ri));
2668
2669
2670 if (status->flag & RX_FLAG_HT) {
2671 ri.mcs = status->rate_idx;
2672 ri.flags |= RATE_INFO_FLAGS_MCS;
2673 if (status->flag & RX_FLAG_40MHZ)
2674 ri.bw = RATE_INFO_BW_40;
2675 else
2676 ri.bw = RATE_INFO_BW_20;
2677 if (status->flag & RX_FLAG_SHORT_GI)
2678 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2679 } else if (status->flag & RX_FLAG_VHT) {
2680 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2681 ri.mcs = status->rate_idx;
2682 ri.nss = status->vht_nss;
2683 if (status->flag & RX_FLAG_40MHZ)
2684 ri.bw = RATE_INFO_BW_40;
2685 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2686 ri.bw = RATE_INFO_BW_80;
2687 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2688 ri.bw = RATE_INFO_BW_160;
2689 else
2690 ri.bw = RATE_INFO_BW_20;
2691 if (status->flag & RX_FLAG_SHORT_GI)
2692 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2693 } else {
2694 struct ieee80211_supported_band *sband;
2695 int shift = 0;
2696 int bitrate;
2697
2698 if (status->flag & RX_FLAG_10MHZ) {
2699 shift = 1;
2700 ri.bw = RATE_INFO_BW_10;
2701 } else if (status->flag & RX_FLAG_5MHZ) {
2702 shift = 2;
2703 ri.bw = RATE_INFO_BW_5;
2704 } else {
2705 ri.bw = RATE_INFO_BW_20;
2706 }
2707
2708 sband = local->hw.wiphy->bands[status->band];
2709 bitrate = sband->bitrates[status->rate_idx].bitrate;
2710 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2711
2712 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2713
2714 if (status->band == IEEE80211_BAND_5GHZ) {
2715 ts += 20 << shift;
2716 mpdu_offset += 2;
2717 } else if (status->flag & RX_FLAG_SHORTPRE) {
2718 ts += 96;
2719 } else {
2720 ts += 192;
2721 }
2722 }
2723 }
2724
2725 rate = cfg80211_calculate_bitrate(&ri);
2726 if (WARN_ONCE(!rate,
2727 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2728 status->flag, status->rate_idx, status->vht_nss))
2729 return 0;
2730
2731
2732 if (status->flag & RX_FLAG_MACTIME_END)
2733 ts -= mpdu_len * 8 * 10 / rate;
2734
2735 ts += mpdu_offset * 8 * 10 / rate;
2736
2737 return ts;
2738}
2739
2740void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2741{
2742 struct ieee80211_sub_if_data *sdata;
2743 struct cfg80211_chan_def chandef;
2744
2745 mutex_lock(&local->mtx);
2746 mutex_lock(&local->iflist_mtx);
2747 list_for_each_entry(sdata, &local->interfaces, list) {
2748
2749
2750
2751
2752 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2753
2754 if (sdata->wdev.cac_started) {
2755 chandef = sdata->vif.bss_conf.chandef;
2756 ieee80211_vif_release_channel(sdata);
2757 cfg80211_cac_event(sdata->dev,
2758 &chandef,
2759 NL80211_RADAR_CAC_ABORTED,
2760 GFP_KERNEL);
2761 }
2762 }
2763 mutex_unlock(&local->iflist_mtx);
2764 mutex_unlock(&local->mtx);
2765}
2766
2767void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2768{
2769 struct ieee80211_local *local =
2770 container_of(work, struct ieee80211_local, radar_detected_work);
2771 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2772 struct ieee80211_chanctx *ctx;
2773 int num_chanctx = 0;
2774
2775 mutex_lock(&local->chanctx_mtx);
2776 list_for_each_entry(ctx, &local->chanctx_list, list) {
2777 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2778 continue;
2779
2780 num_chanctx++;
2781 chandef = ctx->conf.def;
2782 }
2783 mutex_unlock(&local->chanctx_mtx);
2784
2785 ieee80211_dfs_cac_cancel(local);
2786
2787 if (num_chanctx > 1)
2788
2789 WARN_ON(1);
2790 else
2791 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2792}
2793
2794void ieee80211_radar_detected(struct ieee80211_hw *hw)
2795{
2796 struct ieee80211_local *local = hw_to_local(hw);
2797
2798 trace_api_radar_detected(local);
2799
2800 ieee80211_queue_work(hw, &local->radar_detected_work);
2801}
2802EXPORT_SYMBOL(ieee80211_radar_detected);
2803
2804u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2805{
2806 u32 ret;
2807 int tmp;
2808
2809 switch (c->width) {
2810 case NL80211_CHAN_WIDTH_20:
2811 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2812 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2813 break;
2814 case NL80211_CHAN_WIDTH_40:
2815 c->width = NL80211_CHAN_WIDTH_20;
2816 c->center_freq1 = c->chan->center_freq;
2817 ret = IEEE80211_STA_DISABLE_40MHZ |
2818 IEEE80211_STA_DISABLE_VHT;
2819 break;
2820 case NL80211_CHAN_WIDTH_80:
2821 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2822
2823 tmp /= 2;
2824
2825 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2826 c->width = NL80211_CHAN_WIDTH_40;
2827 ret = IEEE80211_STA_DISABLE_VHT;
2828 break;
2829 case NL80211_CHAN_WIDTH_80P80:
2830 c->center_freq2 = 0;
2831 c->width = NL80211_CHAN_WIDTH_80;
2832 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2833 IEEE80211_STA_DISABLE_160MHZ;
2834 break;
2835 case NL80211_CHAN_WIDTH_160:
2836
2837 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2838
2839 tmp /= 4;
2840 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2841 c->width = NL80211_CHAN_WIDTH_80;
2842 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2843 IEEE80211_STA_DISABLE_160MHZ;
2844 break;
2845 default:
2846 case NL80211_CHAN_WIDTH_20_NOHT:
2847 WARN_ON_ONCE(1);
2848 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2849 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2850 break;
2851 case NL80211_CHAN_WIDTH_5:
2852 case NL80211_CHAN_WIDTH_10:
2853 WARN_ON_ONCE(1);
2854
2855 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2856 break;
2857 }
2858
2859 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2860
2861 return ret;
2862}
2863
2864
2865
2866
2867
2868bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2869 enum ieee80211_smps_mode smps_mode_new)
2870{
2871 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2872 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2873 return false;
2874
2875 switch (smps_mode_old) {
2876 case IEEE80211_SMPS_STATIC:
2877 return false;
2878 case IEEE80211_SMPS_DYNAMIC:
2879 return smps_mode_new == IEEE80211_SMPS_STATIC;
2880 case IEEE80211_SMPS_OFF:
2881 return smps_mode_new != IEEE80211_SMPS_OFF;
2882 default:
2883 WARN_ON(1);
2884 }
2885
2886 return false;
2887}
2888
2889int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2890 struct cfg80211_csa_settings *csa_settings)
2891{
2892 struct sk_buff *skb;
2893 struct ieee80211_mgmt *mgmt;
2894 struct ieee80211_local *local = sdata->local;
2895 int freq;
2896 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2897 sizeof(mgmt->u.action.u.chan_switch);
2898 u8 *pos;
2899
2900 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2901 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2902 return -EOPNOTSUPP;
2903
2904 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2905 5 +
2906 3 +
2907 8);
2908 if (!skb)
2909 return -ENOMEM;
2910
2911 skb_reserve(skb, local->tx_headroom);
2912 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2913 memset(mgmt, 0, hdr_len);
2914 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2915 IEEE80211_STYPE_ACTION);
2916
2917 eth_broadcast_addr(mgmt->da);
2918 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2919 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2920 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2921 } else {
2922 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2923 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2924 }
2925 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2926 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2927 pos = skb_put(skb, 5);
2928 *pos++ = WLAN_EID_CHANNEL_SWITCH;
2929 *pos++ = 3;
2930 *pos++ = csa_settings->block_tx ? 1 : 0;
2931 freq = csa_settings->chandef.chan->center_freq;
2932 *pos++ = ieee80211_frequency_to_channel(freq);
2933 *pos++ = csa_settings->count;
2934
2935 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2936 enum nl80211_channel_type ch_type;
2937
2938 skb_put(skb, 3);
2939 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
2940 *pos++ = 1;
2941 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2942 if (ch_type == NL80211_CHAN_HT40PLUS)
2943 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2944 else
2945 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2946 }
2947
2948 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2949 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2950
2951 skb_put(skb, 8);
2952 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
2953 *pos++ = 6;
2954 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;
2955 *pos = 0x00;
2956 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2957 *pos++ |= csa_settings->block_tx ?
2958 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2959 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
2960 pos += 2;
2961 put_unaligned_le16(ifmsh->pre_value, pos);
2962 pos += 2;
2963 }
2964
2965 ieee80211_tx_skb(sdata, skb);
2966 return 0;
2967}
2968
2969bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2970{
2971 return !(cs == NULL || cs->cipher == 0 ||
2972 cs->hdr_len < cs->pn_len + cs->pn_off ||
2973 cs->hdr_len <= cs->key_idx_off ||
2974 cs->key_idx_shift > 7 ||
2975 cs->key_idx_mask == 0);
2976}
2977
2978bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2979{
2980 int i;
2981
2982
2983 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2984
2985 for (i = 0; i < n; i++)
2986 if (!ieee80211_cs_valid(&cs[i]))
2987 return false;
2988
2989 return true;
2990}
2991
2992const struct ieee80211_cipher_scheme *
2993ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2994 enum nl80211_iftype iftype)
2995{
2996 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2997 int n = local->hw.n_cipher_schemes;
2998 int i;
2999 const struct ieee80211_cipher_scheme *cs = NULL;
3000
3001 for (i = 0; i < n; i++) {
3002 if (l[i].cipher == cipher) {
3003 cs = &l[i];
3004 break;
3005 }
3006 }
3007
3008 if (!cs || !(cs->iftype & BIT(iftype)))
3009 return NULL;
3010
3011 return cs;
3012}
3013
3014int ieee80211_cs_headroom(struct ieee80211_local *local,
3015 struct cfg80211_crypto_settings *crypto,
3016 enum nl80211_iftype iftype)
3017{
3018 const struct ieee80211_cipher_scheme *cs;
3019 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3020 int i;
3021
3022 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3023 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3024 iftype);
3025
3026 if (cs && headroom < cs->hdr_len)
3027 headroom = cs->hdr_len;
3028 }
3029
3030 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3031 if (cs && headroom < cs->hdr_len)
3032 headroom = cs->hdr_len;
3033
3034 return headroom;
3035}
3036
3037static bool
3038ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3039{
3040 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3041 int skip;
3042
3043 if (end > 0)
3044 return false;
3045
3046
3047 if (data->count[i] == 1)
3048 return false;
3049
3050 if (data->desc[i].interval == 0)
3051 return false;
3052
3053
3054 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3055 if (data->count[i] < 255) {
3056 if (data->count[i] <= skip) {
3057 data->count[i] = 0;
3058 return false;
3059 }
3060
3061 data->count[i] -= skip;
3062 }
3063
3064 data->desc[i].start += skip * data->desc[i].interval;
3065
3066 return true;
3067}
3068
3069static bool
3070ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3071 s32 *offset)
3072{
3073 bool ret = false;
3074 int i;
3075
3076 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3077 s32 cur;
3078
3079 if (!data->count[i])
3080 continue;
3081
3082 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3083 ret = true;
3084
3085 cur = data->desc[i].start - tsf;
3086 if (cur > *offset)
3087 continue;
3088
3089 cur = data->desc[i].start + data->desc[i].duration - tsf;
3090 if (cur > *offset)
3091 *offset = cur;
3092 }
3093
3094 return ret;
3095}
3096
3097static u32
3098ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3099{
3100 s32 offset = 0;
3101 int tries = 0;
3102
3103
3104
3105
3106 int max_tries = 5;
3107
3108 ieee80211_extend_absent_time(data, tsf, &offset);
3109 do {
3110 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3111 break;
3112
3113 tries++;
3114 } while (tries < max_tries);
3115
3116 return offset;
3117}
3118
3119void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3120{
3121 u32 next_offset = BIT(31) - 1;
3122 int i;
3123
3124 data->absent = 0;
3125 data->has_next_tsf = false;
3126 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3127 s32 start;
3128
3129 if (!data->count[i])
3130 continue;
3131
3132 ieee80211_extend_noa_desc(data, tsf, i);
3133 start = data->desc[i].start - tsf;
3134 if (start <= 0)
3135 data->absent |= BIT(i);
3136
3137 if (next_offset > start)
3138 next_offset = start;
3139
3140 data->has_next_tsf = true;
3141 }
3142
3143 if (data->absent)
3144 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3145
3146 data->next_tsf = tsf + next_offset;
3147}
3148EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3149
3150int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3151 struct ieee80211_noa_data *data, u32 tsf)
3152{
3153 int ret = 0;
3154 int i;
3155
3156 memset(data, 0, sizeof(*data));
3157
3158 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3159 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3160
3161 if (!desc->count || !desc->duration)
3162 continue;
3163
3164 data->count[i] = desc->count;
3165 data->desc[i].start = le32_to_cpu(desc->start_time);
3166 data->desc[i].duration = le32_to_cpu(desc->duration);
3167 data->desc[i].interval = le32_to_cpu(desc->interval);
3168
3169 if (data->count[i] > 1 &&
3170 data->desc[i].interval < data->desc[i].duration)
3171 continue;
3172
3173 ieee80211_extend_noa_desc(data, tsf, i);
3174 ret++;
3175 }
3176
3177 if (ret)
3178 ieee80211_update_p2p_noa(data, tsf);
3179
3180 return ret;
3181}
3182EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3183
3184void ieee80211_recalc_dtim(struct ieee80211_local *local,
3185 struct ieee80211_sub_if_data *sdata)
3186{
3187 u64 tsf = drv_get_tsf(local, sdata);
3188 u64 dtim_count = 0;
3189 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3190 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3191 struct ps_data *ps;
3192 u8 bcns_from_dtim;
3193
3194 if (tsf == -1ULL || !beacon_int || !dtim_period)
3195 return;
3196
3197 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3198 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3199 if (!sdata->bss)
3200 return;
3201
3202 ps = &sdata->bss->ps;
3203 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3204 ps = &sdata->u.mesh.ps;
3205 } else {
3206 return;
3207 }
3208
3209
3210
3211
3212
3213
3214 do_div(tsf, beacon_int);
3215 bcns_from_dtim = do_div(tsf, dtim_period);
3216
3217 if (!bcns_from_dtim)
3218 dtim_count = 0;
3219 else
3220 dtim_count = dtim_period - bcns_from_dtim;
3221
3222 ps->dtim_count = dtim_count;
3223}
3224
3225static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3226 struct ieee80211_chanctx *ctx)
3227{
3228 struct ieee80211_sub_if_data *sdata;
3229 u8 radar_detect = 0;
3230
3231 lockdep_assert_held(&local->chanctx_mtx);
3232
3233 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3234 return 0;
3235
3236 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3237 if (sdata->reserved_radar_required)
3238 radar_detect |= BIT(sdata->reserved_chandef.width);
3239
3240
3241
3242
3243
3244 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3245 !list_empty(&ctx->assigned_vifs));
3246
3247 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3248 if (sdata->radar_required)
3249 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3250
3251 return radar_detect;
3252}
3253
3254int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3255 const struct cfg80211_chan_def *chandef,
3256 enum ieee80211_chanctx_mode chanmode,
3257 u8 radar_detect)
3258{
3259 struct ieee80211_local *local = sdata->local;
3260 struct ieee80211_sub_if_data *sdata_iter;
3261 enum nl80211_iftype iftype = sdata->wdev.iftype;
3262 int num[NUM_NL80211_IFTYPES];
3263 struct ieee80211_chanctx *ctx;
3264 int num_different_channels = 0;
3265 int total = 1;
3266
3267 lockdep_assert_held(&local->chanctx_mtx);
3268
3269 if (WARN_ON(hweight32(radar_detect) > 1))
3270 return -EINVAL;
3271
3272 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3273 !chandef->chan))
3274 return -EINVAL;
3275
3276 if (chandef)
3277 num_different_channels = 1;
3278
3279 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3280 return -EINVAL;
3281
3282
3283 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3284 if (radar_detect)
3285 return -EINVAL;
3286 return 0;
3287 }
3288
3289 memset(num, 0, sizeof(num));
3290
3291 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3292 num[iftype] = 1;
3293
3294 list_for_each_entry(ctx, &local->chanctx_list, list) {
3295 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3296 continue;
3297 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3298 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3299 num_different_channels++;
3300 continue;
3301 }
3302 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3303 cfg80211_chandef_compatible(chandef,
3304 &ctx->conf.def))
3305 continue;
3306 num_different_channels++;
3307 }
3308
3309 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3310 struct wireless_dev *wdev_iter;
3311
3312 wdev_iter = &sdata_iter->wdev;
3313
3314 if (sdata_iter == sdata ||
3315 !ieee80211_sdata_running(sdata_iter) ||
3316 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3317 continue;
3318
3319 num[wdev_iter->iftype]++;
3320 total++;
3321 }
3322
3323 if (total == 1 && !radar_detect)
3324 return 0;
3325
3326 return cfg80211_check_combinations(local->hw.wiphy,
3327 num_different_channels,
3328 radar_detect, num);
3329}
3330
3331static void
3332ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3333 void *data)
3334{
3335 u32 *max_num_different_channels = data;
3336
3337 *max_num_different_channels = max(*max_num_different_channels,
3338 c->num_different_channels);
3339}
3340
3341int ieee80211_max_num_channels(struct ieee80211_local *local)
3342{
3343 struct ieee80211_sub_if_data *sdata;
3344 int num[NUM_NL80211_IFTYPES] = {};
3345 struct ieee80211_chanctx *ctx;
3346 int num_different_channels = 0;
3347 u8 radar_detect = 0;
3348 u32 max_num_different_channels = 1;
3349 int err;
3350
3351 lockdep_assert_held(&local->chanctx_mtx);
3352
3353 list_for_each_entry(ctx, &local->chanctx_list, list) {
3354 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3355 continue;
3356
3357 num_different_channels++;
3358
3359 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3360 }
3361
3362 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3363 num[sdata->wdev.iftype]++;
3364
3365 err = cfg80211_iter_combinations(local->hw.wiphy,
3366 num_different_channels, radar_detect,
3367 num, ieee80211_iter_max_chans,
3368 &max_num_different_channels);
3369 if (err < 0)
3370 return err;
3371
3372 return max_num_different_channels;
3373}
3374
3375u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3376{
3377 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3378 *buf++ = 7;
3379 *buf++ = 0x00;
3380 *buf++ = 0x50;
3381 *buf++ = 0xf2;
3382 *buf++ = 2;
3383 *buf++ = 0;
3384 *buf++ = 1;
3385 *buf++ = qosinfo;
3386
3387 return buf;
3388}
3389
3390void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3391 struct sta_info *sta,
3392 struct txq_info *txqi, int tid)
3393{
3394 skb_queue_head_init(&txqi->queue);
3395 txqi->txq.vif = &sdata->vif;
3396
3397 if (sta) {
3398 txqi->txq.sta = &sta->sta;
3399 sta->sta.txq[tid] = &txqi->txq;
3400 txqi->txq.tid = tid;
3401 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3402 } else {
3403 sdata->vif.txq = &txqi->txq;
3404 txqi->txq.tid = 0;
3405 txqi->txq.ac = IEEE80211_AC_BE;
3406 }
3407}
3408
3409void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3410 unsigned long *frame_cnt,
3411 unsigned long *byte_cnt)
3412{
3413 struct txq_info *txqi = to_txq_info(txq);
3414
3415 if (frame_cnt)
3416 *frame_cnt = txqi->queue.qlen;
3417
3418 if (byte_cnt)
3419 *byte_cnt = txqi->byte_cnt;
3420}
3421EXPORT_SYMBOL(ieee80211_txq_get_depth);
3422