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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 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/export.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
22#include <linux/bitmap.h>
23#include <linux/crc32.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26#include <net/rtnetlink.h>
27
28#include "ieee80211_i.h"
29#include "driver-ops.h"
30#include "rate.h"
31#include "mesh.h"
32#include "wme.h"
33#include "led.h"
34#include "wep.h"
35
36/* privid for wiphys to determine whether they belong to us or not */
37const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
51{
52 __le16 fc = hdr->frame_control;
53
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
56 return NULL;
57
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
61
62 if (ieee80211_has_a4(fc))
63 return NULL;
64 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
67 return hdr->addr2;
68
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
75 return hdr->addr3;
76 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if (ieee80211_is_pspoll(fc))
80 return hdr->addr1;
81
82 if (ieee80211_is_back_req(fc)) {
83 switch (type) {
84 case NL80211_IFTYPE_STATION:
85 return hdr->addr2;
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
88 return hdr->addr1;
89 default:
90 break; /* fall through to the return */
91 }
92 }
93 }
94
95 return NULL;
96}
97
98void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
99{
100 struct sk_buff *skb;
101 struct ieee80211_hdr *hdr;
102
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
106 }
107}
108
109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble,
111 int shift)
112{
113 int dur;
114
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
118 * also include SIFS.
119 *
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
122 *
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
125 */
126
127 if (band == IEEE80211_BAND_5GHZ || erp) {
128 /*
129 * OFDM:
130 *
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
135 *
136 * T_SYM = 4 usec
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
140 */
141 dur = 16; /* SIFS + signal ext */
142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
144
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
148 */
149 dur *= 1 << shift;
150
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
153 */
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
156 } else {
157 /*
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
161 *
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
166 */
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
169
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
171 }
172
173 return dur;
174}
175
176/* Exported duration function for driver use */
177__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
179 enum ieee80211_band band,
180 size_t frame_len,
181 struct ieee80211_rate *rate)
182{
183 struct ieee80211_sub_if_data *sdata;
184 u16 dur;
185 int erp, shift = 0;
186 bool short_preamble = false;
187
188 erp = 0;
189 if (vif) {
190 sdata = vif_to_sdata(vif);
191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
194 shift = ieee80211_vif_get_shift(vif);
195 }
196
197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
198 short_preamble, shift);
199
200 return cpu_to_le16(dur);
201}
202EXPORT_SYMBOL(ieee80211_generic_frame_duration);
203
204__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
206 const struct ieee80211_tx_info *frame_txctl)
207{
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
210 struct ieee80211_sub_if_data *sdata;
211 bool short_preamble;
212 int erp, shift = 0, bitrate;
213 u16 dur;
214 struct ieee80211_supported_band *sband;
215
216 sband = local->hw.wiphy->bands[frame_txctl->band];
217
218 short_preamble = false;
219
220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
221
222 erp = 0;
223 if (vif) {
224 sdata = vif_to_sdata(vif);
225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
228 shift = ieee80211_vif_get_shift(vif);
229 }
230
231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
232
233 /* CTS duration */
234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 /* Data frame duration */
237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
238 erp, short_preamble, shift);
239 /* ACK duration */
240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
241 erp, short_preamble, shift);
242
243 return cpu_to_le16(dur);
244}
245EXPORT_SYMBOL(ieee80211_rts_duration);
246
247__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
249 size_t frame_len,
250 const struct ieee80211_tx_info *frame_txctl)
251{
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
254 struct ieee80211_sub_if_data *sdata;
255 bool short_preamble;
256 int erp, shift = 0, bitrate;
257 u16 dur;
258 struct ieee80211_supported_band *sband;
259
260 sband = local->hw.wiphy->bands[frame_txctl->band];
261
262 short_preamble = false;
263
264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
265 erp = 0;
266 if (vif) {
267 sdata = vif_to_sdata(vif);
268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
271 shift = ieee80211_vif_get_shift(vif);
272 }
273
274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
275
276 /* Data frame duration */
277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
278 erp, short_preamble, shift);
279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
280 /* ACK duration */
281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
282 erp, short_preamble, shift);
283 }
284
285 return cpu_to_le16(dur);
286}
287EXPORT_SYMBOL(ieee80211_ctstoself_duration);
288
289void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
290{
291 struct ieee80211_sub_if_data *sdata;
292 int n_acs = IEEE80211_NUM_ACS;
293
294 if (local->hw.queues < IEEE80211_NUM_ACS)
295 n_acs = 1;
296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
298 int ac;
299
300 if (!sdata->dev)
301 continue;
302
303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
305 continue;
306
307 for (ac = 0; ac < n_acs; ac++) {
308 int ac_queue = sdata->vif.hw_queue[ac];
309
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
315 }
316 }
317}
318
319static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
321{
322 struct ieee80211_local *local = hw_to_local(hw);
323
324 trace_wake_queue(local, queue, reason);
325
326 if (WARN_ON(queue >= hw->queues))
327 return;
328
329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
330 return;
331
332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
333
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
336 return;
337
338 if (skb_queue_empty(&local->pending[queue])) {
339 rcu_read_lock();
340 ieee80211_propagate_queue_wake(local, queue);
341 rcu_read_unlock();
342 } else
343 tasklet_schedule(&local->tx_pending_tasklet);
344}
345
346void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
348{
349 struct ieee80211_local *local = hw_to_local(hw);
350 unsigned long flags;
351
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355}
356
357void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
358{
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
361}
362EXPORT_SYMBOL(ieee80211_wake_queue);
363
364static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
366{
367 struct ieee80211_local *local = hw_to_local(hw);
368 struct ieee80211_sub_if_data *sdata;
369 int n_acs = IEEE80211_NUM_ACS;
370
371 trace_stop_queue(local, queue, reason);
372
373 if (WARN_ON(queue >= hw->queues))
374 return;
375
376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
377 return;
378
379 __set_bit(reason, &local->queue_stop_reasons[queue]);
380
381 if (local->hw.queues < IEEE80211_NUM_ACS)
382 n_acs = 1;
383
384 rcu_read_lock();
385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
386 int ac;
387
388 if (!sdata->dev)
389 continue;
390
391 for (ac = 0; ac < n_acs; ac++) {
392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
395 }
396 }
397 rcu_read_unlock();
398}
399
400void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
402{
403 struct ieee80211_local *local = hw_to_local(hw);
404 unsigned long flags;
405
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
409}
410
411void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
412{
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
415}
416EXPORT_SYMBOL(ieee80211_stop_queue);
417
418void ieee80211_add_pending_skb(struct ieee80211_local *local,
419 struct sk_buff *skb)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 unsigned long flags;
423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
424 int queue = info->hw_queue;
425
426 if (WARN_ON(!info->control.vif)) {
427 ieee80211_free_txskb(&local->hw, skb);
428 return;
429 }
430
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
433 __skb_queue_tail(&local->pending[queue], skb);
434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
438void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
440{
441 struct ieee80211_hw *hw = &local->hw;
442 struct sk_buff *skb;
443 unsigned long flags;
444 int queue, i;
445
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 while ((skb = skb_dequeue(skbs))) {
448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
449
450 if (WARN_ON(!info->control.vif)) {
451 ieee80211_free_txskb(&local->hw, skb);
452 continue;
453 }
454
455 queue = info->hw_queue;
456
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
459
460 __skb_queue_tail(&local->pending[queue], skb);
461 }
462
463 for (i = 0; i < hw->queues; i++)
464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
467}
468
469void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
470 unsigned long queues,
471 enum queue_stop_reason reason)
472{
473 struct ieee80211_local *local = hw_to_local(hw);
474 unsigned long flags;
475 int i;
476
477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
478
479 for_each_set_bit(i, &queues, hw->queues)
480 __ieee80211_stop_queue(hw, i, reason);
481
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483}
484
485void ieee80211_stop_queues(struct ieee80211_hw *hw)
486{
487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
489}
490EXPORT_SYMBOL(ieee80211_stop_queues);
491
492int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
493{
494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
496 int ret;
497
498 if (WARN_ON(queue >= hw->queues))
499 return true;
500
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
505 return ret;
506}
507EXPORT_SYMBOL(ieee80211_queue_stopped);
508
509void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
510 unsigned long queues,
511 enum queue_stop_reason reason)
512{
513 struct ieee80211_local *local = hw_to_local(hw);
514 unsigned long flags;
515 int i;
516
517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
518
519 for_each_set_bit(i, &queues, hw->queues)
520 __ieee80211_wake_queue(hw, i, reason);
521
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
523}
524
525void ieee80211_wake_queues(struct ieee80211_hw *hw)
526{
527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
529}
530EXPORT_SYMBOL(ieee80211_wake_queues);
531
532void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
534{
535 u32 queues;
536
537 if (!local->ops->flush)
538 return;
539
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
541 int ac;
542
543 queues = 0;
544
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
549 } else {
550 /* all queues */
551 queues = BIT(local->hw.queues) - 1;
552 }
553
554 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
556
557 drv_flush(local, queues, false);
558
559 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
561}
562
563static void __iterate_active_interfaces(struct ieee80211_local *local,
564 u32 iter_flags,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
567 void *data)
568{
569 struct ieee80211_sub_if_data *sdata;
570
571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
572 switch (sdata->vif.type) {
573 case NL80211_IFTYPE_MONITOR:
574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
575 continue;
576 break;
577 case NL80211_IFTYPE_AP_VLAN:
578 continue;
579 default:
580 break;
581 }
582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
584 continue;
585 if (ieee80211_sdata_running(sdata))
586 iterator(data, sdata->vif.addr,
587 &sdata->vif);
588 }
589
590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
593 if (sdata &&
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
596 iterator(data, sdata->vif.addr, &sdata->vif);
597}
598
599void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
603 void *data)
604{
605 struct ieee80211_local *local = hw_to_local(hw);
606
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
609 mutex_unlock(&local->iflist_mtx);
610}
611EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
612
613void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw *hw, u32 iter_flags,
615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
617 void *data)
618{
619 struct ieee80211_local *local = hw_to_local(hw);
620
621 rcu_read_lock();
622 __iterate_active_interfaces(local, iter_flags, iterator, data);
623 rcu_read_unlock();
624}
625EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
626
627void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632{
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 ASSERT_RTNL();
636
637 __iterate_active_interfaces(local, iter_flags, iterator, data);
638}
639EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
640
641struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
642{
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
644
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
647 return NULL;
648 return &sdata->vif;
649}
650EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
651
652/*
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
658 */
659static bool ieee80211_can_queue_work(struct ieee80211_local *local)
660{
661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
663 return false;
664
665 return true;
666}
667
668void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 if (!ieee80211_can_queue_work(local))
673 return;
674
675 queue_work(local->workqueue, work);
676}
677EXPORT_SYMBOL(ieee80211_queue_work);
678
679void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
681 unsigned long delay)
682{
683 struct ieee80211_local *local = hw_to_local(hw);
684
685 if (!ieee80211_can_queue_work(local))
686 return;
687
688 queue_delayed_work(local->workqueue, dwork, delay);
689}
690EXPORT_SYMBOL(ieee80211_queue_delayed_work);
691
692u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
693 struct ieee802_11_elems *elems,
694 u64 filter, u32 crc)
695{
696 size_t left = len;
697 const u8 *pos = start;
698 bool calc_crc = filter != 0;
699 DECLARE_BITMAP(seen_elems, 256);
700 const u8 *ie;
701
702 bitmap_zero(seen_elems, 256);
703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
706
707 while (left >= 2) {
708 u8 id, elen;
709 bool elem_parse_failed;
710
711 id = *pos++;
712 elen = *pos++;
713 left -= 2;
714
715 if (elen > left) {
716 elems->parse_error = true;
717 break;
718 }
719
720 switch (id) {
721 case WLAN_EID_SSID:
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
726 case WLAN_EID_TIM:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
729 case WLAN_EID_RSN:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
739 case WLAN_EID_PREQ:
740 case WLAN_EID_PREP:
741 case WLAN_EID_PERR:
742 case WLAN_EID_RANN:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
750 case WLAN_EID_CHAN_SWITCH_PARAM:
751 /*
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
754 */
755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
757 left -= elen;
758 pos += elen;
759 continue;
760 }
761 break;
762 }
763
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
766
767 elem_parse_failed = false;
768
769 switch (id) {
770 case WLAN_EID_SSID:
771 elems->ssid = pos;
772 elems->ssid_len = elen;
773 break;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
777 break;
778 case WLAN_EID_DS_PARAMS:
779 if (elen >= 1)
780 elems->ds_params = pos;
781 else
782 elem_parse_failed = true;
783 break;
784 case WLAN_EID_TIM:
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
788 } else
789 elem_parse_failed = true;
790 break;
791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
794 break;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
797 pos[2] == 0xf2) {
798 /* Microsoft OUI (00:50:F2) */
799
800 if (calc_crc)
801 crc = crc32_be(crc, pos - 2, elen + 2);
802
803 if (elen >= 5 && pos[3] == 2) {
804 /* OUI Type 2 - WMM IE */
805 if (pos[4] == 0) {
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
811 }
812 }
813 }
814 break;
815 case WLAN_EID_RSN:
816 elems->rsn = pos;
817 elems->rsn_len = elen;
818 break;
819 case WLAN_EID_ERP_INFO:
820 if (elen >= 1)
821 elems->erp_info = pos;
822 else
823 elem_parse_failed = true;
824 break;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
828 break;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
832 else
833 elem_parse_failed = true;
834 break;
835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
838 else
839 elem_parse_failed = true;
840 break;
841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
844 else
845 elem_parse_failed = true;
846 break;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
850 else
851 elem_parse_failed = true;
852 break;
853 case WLAN_EID_OPMODE_NOTIF:
854 if (elen > 0)
855 elems->opmode_notif = pos;
856 else
857 elem_parse_failed = true;
858 break;
859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
862 break;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
866 else
867 elem_parse_failed = true;
868 break;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
872 break;
873 case WLAN_EID_MESH_AWAKE_WINDOW:
874 if (elen >= 2)
875 elems->awake_window = (void *)pos;
876 break;
877 case WLAN_EID_PREQ:
878 elems->preq = pos;
879 elems->preq_len = elen;
880 break;
881 case WLAN_EID_PREP:
882 elems->prep = pos;
883 elems->prep_len = elen;
884 break;
885 case WLAN_EID_PERR:
886 elems->perr = pos;
887 elems->perr_len = elen;
888 break;
889 case WLAN_EID_RANN:
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
892 else
893 elem_parse_failed = true;
894 break;
895 case WLAN_EID_CHANNEL_SWITCH:
896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
898 break;
899 }
900 elems->ch_switch_ie = (void *)pos;
901 break;
902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
905 break;
906 }
907 elems->ext_chansw_ie = (void *)pos;
908 break;
909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
912 break;
913 }
914 elems->sec_chan_offs = (void *)pos;
915 break;
916 case WLAN_EID_CHAN_SWITCH_PARAM:
917 if (elen !=
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
920 break;
921 }
922 elems->mesh_chansw_params_ie = (void *)pos;
923 break;
924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
925 if (!action ||
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
928 break;
929 }
930 elems->wide_bw_chansw_ie = (void *)pos;
931 break;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
933 if (action) {
934 elem_parse_failed = true;
935 break;
936 }
937 /*
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
941 */
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
943 pos, elen);
944 if (ie) {
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
947 (void *)(ie + 2);
948 else
949 elem_parse_failed = true;
950 }
951 break;
952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
955 break;
956 case WLAN_EID_PWR_CONSTRAINT:
957 if (elen != 1) {
958 elem_parse_failed = true;
959 break;
960 }
961 elems->pwr_constr_elem = pos;
962 break;
963 case WLAN_EID_TIMEOUT_INTERVAL:
964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
966 else
967 elem_parse_failed = true;
968 break;
969 default:
970 break;
971 }
972
973 if (elem_parse_failed)
974 elems->parse_error = true;
975 else
976 __set_bit(id, seen_elems);
977
978 left -= elen;
979 pos += elen;
980 }
981
982 if (left != 0)
983 elems->parse_error = true;
984
985 return crc;
986}
987
988void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
989 bool bss_notify)
990{
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
993 struct ieee80211_chanctx_conf *chanctx_conf;
994 int ac;
995 bool use_11b, enable_qos;
996 int aCWmin, aCWmax;
997
998 if (!local->ops->conf_tx)
999 return;
1000
1001 if (local->hw.queues < IEEE80211_NUM_ACS)
1002 return;
1003
1004 memset(&qparam, 0, sizeof(qparam));
1005
1006 rcu_read_lock();
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
1009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1011 rcu_read_unlock();
1012
1013 /*
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1017 */
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1019
1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1021 aCWmax = 1023;
1022 if (use_11b)
1023 aCWmin = 31;
1024 else
1025 aCWmin = 15;
1026
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1030 qparam.txop = 0;
1031 qparam.aifs = 2;
1032
1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
1035 if (enable_qos) {
1036 switch (ac) {
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1040 qparam.txop = 0;
1041 qparam.aifs = 7;
1042 break;
1043 /* never happens but let's not leave undefined */
1044 default:
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1048 qparam.txop = 0;
1049 qparam.aifs = 3;
1050 break;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1054 if (use_11b)
1055 qparam.txop = 6016/32;
1056 else
1057 qparam.txop = 3008/32;
1058 qparam.aifs = 2;
1059 break;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1063 if (use_11b)
1064 qparam.txop = 3264/32;
1065 else
1066 qparam.txop = 1504/32;
1067 qparam.aifs = 2;
1068 break;
1069 }
1070 }
1071
1072 qparam.uapsd = false;
1073
1074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
1076 }
1077
1078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1080 sdata->vif.bss_conf.qos = enable_qos;
1081 if (bss_notify)
1082 ieee80211_bss_info_change_notify(sdata,
1083 BSS_CHANGED_QOS);
1084 }
1085}
1086
1087void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1088 u16 transaction, u16 auth_alg, u16 status,
1089 const u8 *extra, size_t extra_len, const u8 *da,
1090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1091 u32 tx_flags)
1092{
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
1096 int err;
1097
1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
1100 if (!skb)
1101 return;
1102
1103 skb_reserve(skb, local->hw.extra_tx_headroom);
1104
1105 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1106 memset(mgmt, 0, 24 + 6);
1107 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1108 IEEE80211_STYPE_AUTH);
1109 memcpy(mgmt->da, da, ETH_ALEN);
1110 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1111 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1112 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1113 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1114 mgmt->u.auth.status_code = cpu_to_le16(status);
1115 if (extra)
1116 memcpy(skb_put(skb, extra_len), extra, extra_len);
1117
1118 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1119 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1120 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1121 WARN_ON(err);
1122 }
1123
1124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1125 tx_flags;
1126 ieee80211_tx_skb(sdata, skb);
1127}
1128
1129void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1130 const u8 *bssid, u16 stype, u16 reason,
1131 bool send_frame, u8 *frame_buf)
1132{
1133 struct ieee80211_local *local = sdata->local;
1134 struct sk_buff *skb;
1135 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1136
1137 /* build frame */
1138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1139 mgmt->duration = 0; /* initialize only */
1140 mgmt->seq_ctrl = 0; /* initialize only */
1141 memcpy(mgmt->da, bssid, ETH_ALEN);
1142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1143 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1144 /* u.deauth.reason_code == u.disassoc.reason_code */
1145 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1146
1147 if (send_frame) {
1148 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1149 IEEE80211_DEAUTH_FRAME_LEN);
1150 if (!skb)
1151 return;
1152
1153 skb_reserve(skb, local->hw.extra_tx_headroom);
1154
1155 /* copy in frame */
1156 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1157 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1158
1159 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1160 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1161 IEEE80211_SKB_CB(skb)->flags |=
1162 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1163
1164 ieee80211_tx_skb(sdata, skb);
1165 }
1166}
1167
1168int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1169 size_t buffer_len, const u8 *ie, size_t ie_len,
1170 enum ieee80211_band band, u32 rate_mask,
1171 struct cfg80211_chan_def *chandef)
1172{
1173 struct ieee80211_supported_band *sband;
1174 u8 *pos = buffer, *end = buffer + buffer_len;
1175 size_t offset = 0, noffset;
1176 int supp_rates_len, i;
1177 u8 rates[32];
1178 int num_rates;
1179 int ext_rates_len;
1180 int shift;
1181 u32 rate_flags;
1182
1183 sband = local->hw.wiphy->bands[band];
1184 if (WARN_ON_ONCE(!sband))
1185 return 0;
1186
1187 rate_flags = ieee80211_chandef_rate_flags(chandef);
1188 shift = ieee80211_chandef_get_shift(chandef);
1189
1190 num_rates = 0;
1191 for (i = 0; i < sband->n_bitrates; i++) {
1192 if ((BIT(i) & rate_mask) == 0)
1193 continue; /* skip rate */
1194 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1195 continue;
1196
1197 rates[num_rates++] =
1198 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1199 (1 << shift) * 5);
1200 }
1201
1202 supp_rates_len = min_t(int, num_rates, 8);
1203
1204 if (end - pos < 2 + supp_rates_len)
1205 goto out_err;
1206 *pos++ = WLAN_EID_SUPP_RATES;
1207 *pos++ = supp_rates_len;
1208 memcpy(pos, rates, supp_rates_len);
1209 pos += supp_rates_len;
1210
1211 /* insert "request information" if in custom IEs */
1212 if (ie && ie_len) {
1213 static const u8 before_extrates[] = {
1214 WLAN_EID_SSID,
1215 WLAN_EID_SUPP_RATES,
1216 WLAN_EID_REQUEST,
1217 };
1218 noffset = ieee80211_ie_split(ie, ie_len,
1219 before_extrates,
1220 ARRAY_SIZE(before_extrates),
1221 offset);
1222 if (end - pos < noffset - offset)
1223 goto out_err;
1224 memcpy(pos, ie + offset, noffset - offset);
1225 pos += noffset - offset;
1226 offset = noffset;
1227 }
1228
1229 ext_rates_len = num_rates - supp_rates_len;
1230 if (ext_rates_len > 0) {
1231 if (end - pos < 2 + ext_rates_len)
1232 goto out_err;
1233 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1234 *pos++ = ext_rates_len;
1235 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1236 pos += ext_rates_len;
1237 }
1238
1239 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1240 if (end - pos < 3)
1241 goto out_err;
1242 *pos++ = WLAN_EID_DS_PARAMS;
1243 *pos++ = 1;
1244 *pos++ = ieee80211_frequency_to_channel(
1245 chandef->chan->center_freq);
1246 }
1247
1248 /* insert custom IEs that go before HT */
1249 if (ie && ie_len) {
1250 static const u8 before_ht[] = {
1251 WLAN_EID_SSID,
1252 WLAN_EID_SUPP_RATES,
1253 WLAN_EID_REQUEST,
1254 WLAN_EID_EXT_SUPP_RATES,
1255 WLAN_EID_DS_PARAMS,
1256 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1257 };
1258 noffset = ieee80211_ie_split(ie, ie_len,
1259 before_ht, ARRAY_SIZE(before_ht),
1260 offset);
1261 if (end - pos < noffset - offset)
1262 goto out_err;
1263 memcpy(pos, ie + offset, noffset - offset);
1264 pos += noffset - offset;
1265 offset = noffset;
1266 }
1267
1268 if (sband->ht_cap.ht_supported) {
1269 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1270 goto out_err;
1271 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1272 sband->ht_cap.cap);
1273 }
1274
1275 /*
1276 * If adding more here, adjust code in main.c
1277 * that calculates local->scan_ies_len.
1278 */
1279
1280 /* insert custom IEs that go before VHT */
1281 if (ie && ie_len) {
1282 static const u8 before_vht[] = {
1283 WLAN_EID_SSID,
1284 WLAN_EID_SUPP_RATES,
1285 WLAN_EID_REQUEST,
1286 WLAN_EID_EXT_SUPP_RATES,
1287 WLAN_EID_DS_PARAMS,
1288 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1289 WLAN_EID_HT_CAPABILITY,
1290 WLAN_EID_BSS_COEX_2040,
1291 WLAN_EID_EXT_CAPABILITY,
1292 WLAN_EID_SSID_LIST,
1293 WLAN_EID_CHANNEL_USAGE,
1294 WLAN_EID_INTERWORKING,
1295 /* mesh ID can't happen here */
1296 /* 60 GHz can't happen here right now */
1297 };
1298 noffset = ieee80211_ie_split(ie, ie_len,
1299 before_vht, ARRAY_SIZE(before_vht),
1300 offset);
1301 if (end - pos < noffset - offset)
1302 goto out_err;
1303 memcpy(pos, ie + offset, noffset - offset);
1304 pos += noffset - offset;
1305 offset = noffset;
1306 }
1307
1308 if (sband->vht_cap.vht_supported) {
1309 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1310 goto out_err;
1311 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1312 sband->vht_cap.cap);
1313 }
1314
1315 /* add any remaining custom IEs */
1316 if (ie && ie_len) {
1317 noffset = ie_len;
1318 if (end - pos < noffset - offset)
1319 goto out_err;
1320 memcpy(pos, ie + offset, noffset - offset);
1321 pos += noffset - offset;
1322 }
1323
1324 return pos - buffer;
1325 out_err:
1326 WARN_ONCE(1, "not enough space for preq IEs\n");
1327 return pos - buffer;
1328}
1329
1330struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1331 u8 *dst, u32 ratemask,
1332 struct ieee80211_channel *chan,
1333 const u8 *ssid, size_t ssid_len,
1334 const u8 *ie, size_t ie_len,
1335 bool directed)
1336{
1337 struct ieee80211_local *local = sdata->local;
1338 struct cfg80211_chan_def chandef;
1339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *mgmt;
1341 int ies_len;
1342
1343 /*
1344 * Do not send DS Channel parameter for directed probe requests
1345 * in order to maximize the chance that we get a response. Some
1346 * badly-behaved APs don't respond when this parameter is included.
1347 */
1348 chandef.width = sdata->vif.bss_conf.chandef.width;
1349 if (directed)
1350 chandef.chan = NULL;
1351 else
1352 chandef.chan = chan;
1353
1354 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1355 ssid, ssid_len, 100 + ie_len);
1356 if (!skb)
1357 return NULL;
1358
1359 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1360 skb_tailroom(skb),
1361 ie, ie_len, chan->band,
1362 ratemask, &chandef);
1363 skb_put(skb, ies_len);
1364
1365 if (dst) {
1366 mgmt = (struct ieee80211_mgmt *) skb->data;
1367 memcpy(mgmt->da, dst, ETH_ALEN);
1368 memcpy(mgmt->bssid, dst, ETH_ALEN);
1369 }
1370
1371 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1372
1373 return skb;
1374}
1375
1376void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1377 const u8 *ssid, size_t ssid_len,
1378 const u8 *ie, size_t ie_len,
1379 u32 ratemask, bool directed, u32 tx_flags,
1380 struct ieee80211_channel *channel, bool scan)
1381{
1382 struct sk_buff *skb;
1383
1384 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1385 ssid, ssid_len,
1386 ie, ie_len, directed);
1387 if (skb) {
1388 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1389 if (scan)
1390 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1391 else
1392 ieee80211_tx_skb(sdata, skb);
1393 }
1394}
1395
1396u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1397 struct ieee802_11_elems *elems,
1398 enum ieee80211_band band, u32 *basic_rates)
1399{
1400 struct ieee80211_supported_band *sband;
1401 size_t num_rates;
1402 u32 supp_rates, rate_flags;
1403 int i, j, shift;
1404 sband = sdata->local->hw.wiphy->bands[band];
1405
1406 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1407 shift = ieee80211_vif_get_shift(&sdata->vif);
1408
1409 if (WARN_ON(!sband))
1410 return 1;
1411
1412 num_rates = sband->n_bitrates;
1413 supp_rates = 0;
1414 for (i = 0; i < elems->supp_rates_len +
1415 elems->ext_supp_rates_len; i++) {
1416 u8 rate = 0;
1417 int own_rate;
1418 bool is_basic;
1419 if (i < elems->supp_rates_len)
1420 rate = elems->supp_rates[i];
1421 else if (elems->ext_supp_rates)
1422 rate = elems->ext_supp_rates
1423 [i - elems->supp_rates_len];
1424 own_rate = 5 * (rate & 0x7f);
1425 is_basic = !!(rate & 0x80);
1426
1427 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1428 continue;
1429
1430 for (j = 0; j < num_rates; j++) {
1431 int brate;
1432 if ((rate_flags & sband->bitrates[j].flags)
1433 != rate_flags)
1434 continue;
1435
1436 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1437 1 << shift);
1438
1439 if (brate == own_rate) {
1440 supp_rates |= BIT(j);
1441 if (basic_rates && is_basic)
1442 *basic_rates |= BIT(j);
1443 }
1444 }
1445 }
1446 return supp_rates;
1447}
1448
1449void ieee80211_stop_device(struct ieee80211_local *local)
1450{
1451 ieee80211_led_radio(local, false);
1452 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1453
1454 cancel_work_sync(&local->reconfig_filter);
1455
1456 flush_workqueue(local->workqueue);
1457 drv_stop(local);
1458}
1459
1460static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1461 struct ieee80211_sub_if_data *sdata)
1462{
1463 struct ieee80211_chanctx_conf *conf;
1464 struct ieee80211_chanctx *ctx;
1465
1466 if (!local->use_chanctx)
1467 return;
1468
1469 mutex_lock(&local->chanctx_mtx);
1470 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1471 lockdep_is_held(&local->chanctx_mtx));
1472 if (conf) {
1473 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1474 drv_assign_vif_chanctx(local, sdata, ctx);
1475 }
1476 mutex_unlock(&local->chanctx_mtx);
1477}
1478
1479int ieee80211_reconfig(struct ieee80211_local *local)
1480{
1481 struct ieee80211_hw *hw = &local->hw;
1482 struct ieee80211_sub_if_data *sdata;
1483 struct ieee80211_chanctx *ctx;
1484 struct sta_info *sta;
1485 int res, i;
1486 bool reconfig_due_to_wowlan = false;
1487 struct ieee80211_sub_if_data *sched_scan_sdata;
1488 bool sched_scan_stopped = false;
1489
1490#ifdef CONFIG_PM
1491 if (local->suspended)
1492 local->resuming = true;
1493
1494 if (local->wowlan) {
1495 res = drv_resume(local);
1496 local->wowlan = false;
1497 if (res < 0) {
1498 local->resuming = false;
1499 return res;
1500 }
1501 if (res == 0)
1502 goto wake_up;
1503 WARN_ON(res > 1);
1504 /*
1505 * res is 1, which means the driver requested
1506 * to go through a regular reset on wakeup.
1507 */
1508 reconfig_due_to_wowlan = true;
1509 }
1510#endif
1511 /* everything else happens only if HW was up & running */
1512 if (!local->open_count)
1513 goto wake_up;
1514
1515 /*
1516 * Upon resume hardware can sometimes be goofy due to
1517 * various platform / driver / bus issues, so restarting
1518 * the device may at times not work immediately. Propagate
1519 * the error.
1520 */
1521 res = drv_start(local);
1522 if (res) {
1523 WARN(local->suspended, "Hardware became unavailable "
1524 "upon resume. This could be a software issue "
1525 "prior to suspend or a hardware issue.\n");
1526 return res;
1527 }
1528
1529 /* setup fragmentation threshold */
1530 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1531
1532 /* setup RTS threshold */
1533 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1534
1535 /* reset coverage class */
1536 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1537
1538 ieee80211_led_radio(local, true);
1539 ieee80211_mod_tpt_led_trig(local,
1540 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1541
1542 /* add interfaces */
1543 sdata = rtnl_dereference(local->monitor_sdata);
1544 if (sdata) {
1545 /* in HW restart it exists already */
1546 WARN_ON(local->resuming);
1547 res = drv_add_interface(local, sdata);
1548 if (WARN_ON(res)) {
1549 rcu_assign_pointer(local->monitor_sdata, NULL);
1550 synchronize_net();
1551 kfree(sdata);
1552 }
1553 }
1554
1555 list_for_each_entry(sdata, &local->interfaces, list) {
1556 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1557 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1558 ieee80211_sdata_running(sdata))
1559 res = drv_add_interface(local, sdata);
1560 }
1561
1562 /* add channel contexts */
1563 if (local->use_chanctx) {
1564 mutex_lock(&local->chanctx_mtx);
1565 list_for_each_entry(ctx, &local->chanctx_list, list)
1566 WARN_ON(drv_add_chanctx(local, ctx));
1567 mutex_unlock(&local->chanctx_mtx);
1568 }
1569
1570 list_for_each_entry(sdata, &local->interfaces, list) {
1571 if (!ieee80211_sdata_running(sdata))
1572 continue;
1573 ieee80211_assign_chanctx(local, sdata);
1574 }
1575
1576 sdata = rtnl_dereference(local->monitor_sdata);
1577 if (sdata && ieee80211_sdata_running(sdata))
1578 ieee80211_assign_chanctx(local, sdata);
1579
1580 /* add STAs back */
1581 mutex_lock(&local->sta_mtx);
1582 list_for_each_entry(sta, &local->sta_list, list) {
1583 enum ieee80211_sta_state state;
1584
1585 if (!sta->uploaded)
1586 continue;
1587
1588 /* AP-mode stations will be added later */
1589 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1590 continue;
1591
1592 for (state = IEEE80211_STA_NOTEXIST;
1593 state < sta->sta_state; state++)
1594 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1595 state + 1));
1596 }
1597 mutex_unlock(&local->sta_mtx);
1598
1599 /* reconfigure tx conf */
1600 if (hw->queues >= IEEE80211_NUM_ACS) {
1601 list_for_each_entry(sdata, &local->interfaces, list) {
1602 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1603 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1604 !ieee80211_sdata_running(sdata))
1605 continue;
1606
1607 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1608 drv_conf_tx(local, sdata, i,
1609 &sdata->tx_conf[i]);
1610 }
1611 }
1612
1613 /* reconfigure hardware */
1614 ieee80211_hw_config(local, ~0);
1615
1616 ieee80211_configure_filter(local);
1617
1618 /* Finally also reconfigure all the BSS information */
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1620 u32 changed;
1621
1622 if (!ieee80211_sdata_running(sdata))
1623 continue;
1624
1625 /* common change flags for all interface types */
1626 changed = BSS_CHANGED_ERP_CTS_PROT |
1627 BSS_CHANGED_ERP_PREAMBLE |
1628 BSS_CHANGED_ERP_SLOT |
1629 BSS_CHANGED_HT |
1630 BSS_CHANGED_BASIC_RATES |
1631 BSS_CHANGED_BEACON_INT |
1632 BSS_CHANGED_BSSID |
1633 BSS_CHANGED_CQM |
1634 BSS_CHANGED_QOS |
1635 BSS_CHANGED_IDLE |
1636 BSS_CHANGED_TXPOWER;
1637
1638 switch (sdata->vif.type) {
1639 case NL80211_IFTYPE_STATION:
1640 changed |= BSS_CHANGED_ASSOC |
1641 BSS_CHANGED_ARP_FILTER |
1642 BSS_CHANGED_PS;
1643
1644 /* Re-send beacon info report to the driver */
1645 if (sdata->u.mgd.have_beacon)
1646 changed |= BSS_CHANGED_BEACON_INFO;
1647
1648 sdata_lock(sdata);
1649 ieee80211_bss_info_change_notify(sdata, changed);
1650 sdata_unlock(sdata);
1651 break;
1652 case NL80211_IFTYPE_ADHOC:
1653 changed |= BSS_CHANGED_IBSS;
1654 /* fall through */
1655 case NL80211_IFTYPE_AP:
1656 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1657
1658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1659 changed |= BSS_CHANGED_AP_PROBE_RESP;
1660
1661 if (rcu_access_pointer(sdata->u.ap.beacon))
1662 drv_start_ap(local, sdata);
1663 }
1664
1665 /* fall through */
1666 case NL80211_IFTYPE_MESH_POINT:
1667 if (sdata->vif.bss_conf.enable_beacon) {
1668 changed |= BSS_CHANGED_BEACON |
1669 BSS_CHANGED_BEACON_ENABLED;
1670 ieee80211_bss_info_change_notify(sdata, changed);
1671 }
1672 break;
1673 case NL80211_IFTYPE_WDS:
1674 break;
1675 case NL80211_IFTYPE_AP_VLAN:
1676 case NL80211_IFTYPE_MONITOR:
1677 /* ignore virtual */
1678 break;
1679 case NL80211_IFTYPE_P2P_DEVICE:
1680 changed = BSS_CHANGED_IDLE;
1681 break;
1682 case NL80211_IFTYPE_UNSPECIFIED:
1683 case NUM_NL80211_IFTYPES:
1684 case NL80211_IFTYPE_P2P_CLIENT:
1685 case NL80211_IFTYPE_P2P_GO:
1686 WARN_ON(1);
1687 break;
1688 }
1689 }
1690
1691 ieee80211_recalc_ps(local, -1);
1692
1693 /*
1694 * The sta might be in psm against the ap (e.g. because
1695 * this was the state before a hw restart), so we
1696 * explicitly send a null packet in order to make sure
1697 * it'll sync against the ap (and get out of psm).
1698 */
1699 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1700 list_for_each_entry(sdata, &local->interfaces, list) {
1701 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1702 continue;
1703 if (!sdata->u.mgd.associated)
1704 continue;
1705
1706 ieee80211_send_nullfunc(local, sdata, 0);
1707 }
1708 }
1709
1710 /* APs are now beaconing, add back stations */
1711 mutex_lock(&local->sta_mtx);
1712 list_for_each_entry(sta, &local->sta_list, list) {
1713 enum ieee80211_sta_state state;
1714
1715 if (!sta->uploaded)
1716 continue;
1717
1718 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1719 continue;
1720
1721 for (state = IEEE80211_STA_NOTEXIST;
1722 state < sta->sta_state; state++)
1723 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1724 state + 1));
1725 }
1726 mutex_unlock(&local->sta_mtx);
1727
1728 /* add back keys */
1729 list_for_each_entry(sdata, &local->interfaces, list)
1730 if (ieee80211_sdata_running(sdata))
1731 ieee80211_enable_keys(sdata);
1732
1733 wake_up:
1734 local->in_reconfig = false;
1735 barrier();
1736
1737 if (local->monitors == local->open_count && local->monitors > 0)
1738 ieee80211_add_virtual_monitor(local);
1739
1740 /*
1741 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1742 * sessions can be established after a resume.
1743 *
1744 * Also tear down aggregation sessions since reconfiguring
1745 * them in a hardware restart scenario is not easily done
1746 * right now, and the hardware will have lost information
1747 * about the sessions, but we and the AP still think they
1748 * are active. This is really a workaround though.
1749 */
1750 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1751 mutex_lock(&local->sta_mtx);
1752
1753 list_for_each_entry(sta, &local->sta_list, list) {
1754 ieee80211_sta_tear_down_BA_sessions(
1755 sta, AGG_STOP_LOCAL_REQUEST);
1756 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1757 }
1758
1759 mutex_unlock(&local->sta_mtx);
1760 }
1761
1762 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1763 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1764
1765 /*
1766 * Reconfigure sched scan if it was interrupted by FW restart or
1767 * suspend.
1768 */
1769 mutex_lock(&local->mtx);
1770 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1771 lockdep_is_held(&local->mtx));
1772 if (sched_scan_sdata && local->sched_scan_req)
1773 /*
1774 * Sched scan stopped, but we don't want to report it. Instead,
1775 * we're trying to reschedule.
1776 */
1777 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1778 local->sched_scan_req))
1779 sched_scan_stopped = true;
1780 mutex_unlock(&local->mtx);
1781
1782 if (sched_scan_stopped)
1783 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1784
1785 /*
1786 * If this is for hw restart things are still running.
1787 * We may want to change that later, however.
1788 */
1789 if (!local->suspended || reconfig_due_to_wowlan)
1790 drv_restart_complete(local);
1791
1792 if (!local->suspended)
1793 return 0;
1794
1795#ifdef CONFIG_PM
1796 /* first set suspended false, then resuming */
1797 local->suspended = false;
1798 mb();
1799 local->resuming = false;
1800
1801 list_for_each_entry(sdata, &local->interfaces, list) {
1802 if (!ieee80211_sdata_running(sdata))
1803 continue;
1804 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1805 ieee80211_sta_restart(sdata);
1806 }
1807
1808 mod_timer(&local->sta_cleanup, jiffies + 1);
1809#else
1810 WARN_ON(1);
1811#endif
1812
1813 return 0;
1814}
1815
1816void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1817{
1818 struct ieee80211_sub_if_data *sdata;
1819 struct ieee80211_local *local;
1820 struct ieee80211_key *key;
1821
1822 if (WARN_ON(!vif))
1823 return;
1824
1825 sdata = vif_to_sdata(vif);
1826 local = sdata->local;
1827
1828 if (WARN_ON(!local->resuming))
1829 return;
1830
1831 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1832 return;
1833
1834 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1835
1836 mutex_lock(&local->key_mtx);
1837 list_for_each_entry(key, &sdata->key_list, list)
1838 key->flags |= KEY_FLAG_TAINTED;
1839 mutex_unlock(&local->key_mtx);
1840}
1841EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1842
1843void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1844{
1845 struct ieee80211_local *local = sdata->local;
1846 struct ieee80211_chanctx_conf *chanctx_conf;
1847 struct ieee80211_chanctx *chanctx;
1848
1849 mutex_lock(&local->chanctx_mtx);
1850
1851 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1852 lockdep_is_held(&local->chanctx_mtx));
1853
1854 if (WARN_ON_ONCE(!chanctx_conf))
1855 goto unlock;
1856
1857 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1858 ieee80211_recalc_smps_chanctx(local, chanctx);
1859 unlock:
1860 mutex_unlock(&local->chanctx_mtx);
1861}
1862
1863void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1864{
1865 struct ieee80211_local *local = sdata->local;
1866 struct ieee80211_chanctx_conf *chanctx_conf;
1867 struct ieee80211_chanctx *chanctx;
1868
1869 mutex_lock(&local->chanctx_mtx);
1870
1871 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1872 lockdep_is_held(&local->chanctx_mtx));
1873
1874 if (WARN_ON_ONCE(!chanctx_conf))
1875 goto unlock;
1876
1877 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1878 ieee80211_recalc_chanctx_min_def(local, chanctx);
1879 unlock:
1880 mutex_unlock(&local->chanctx_mtx);
1881}
1882
1883static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1884{
1885 int i;
1886
1887 for (i = 0; i < n_ids; i++)
1888 if (ids[i] == id)
1889 return true;
1890 return false;
1891}
1892
1893/**
1894 * ieee80211_ie_split - split an IE buffer according to ordering
1895 *
1896 * @ies: the IE buffer
1897 * @ielen: the length of the IE buffer
1898 * @ids: an array with element IDs that are allowed before
1899 * the split
1900 * @n_ids: the size of the element ID array
1901 * @offset: offset where to start splitting in the buffer
1902 *
1903 * This function splits an IE buffer by updating the @offset
1904 * variable to point to the location where the buffer should be
1905 * split.
1906 *
1907 * It assumes that the given IE buffer is well-formed, this
1908 * has to be guaranteed by the caller!
1909 *
1910 * It also assumes that the IEs in the buffer are ordered
1911 * correctly, if not the result of using this function will not
1912 * be ordered correctly either, i.e. it does no reordering.
1913 *
1914 * The function returns the offset where the next part of the
1915 * buffer starts, which may be @ielen if the entire (remainder)
1916 * of the buffer should be used.
1917 */
1918size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1919 const u8 *ids, int n_ids, size_t offset)
1920{
1921 size_t pos = offset;
1922
1923 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1924 pos += 2 + ies[pos + 1];
1925
1926 return pos;
1927}
1928
1929size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1930{
1931 size_t pos = offset;
1932
1933 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1934 pos += 2 + ies[pos + 1];
1935
1936 return pos;
1937}
1938
1939static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1940 int rssi_min_thold,
1941 int rssi_max_thold)
1942{
1943 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1944
1945 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1946 return;
1947
1948 /*
1949 * Scale up threshold values before storing it, as the RSSI averaging
1950 * algorithm uses a scaled up value as well. Change this scaling
1951 * factor if the RSSI averaging algorithm changes.
1952 */
1953 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1954 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1955}
1956
1957void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1958 int rssi_min_thold,
1959 int rssi_max_thold)
1960{
1961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1962
1963 WARN_ON(rssi_min_thold == rssi_max_thold ||
1964 rssi_min_thold > rssi_max_thold);
1965
1966 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1967 rssi_max_thold);
1968}
1969EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1970
1971void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1972{
1973 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1974
1975 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1976}
1977EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1978
1979u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1980 u16 cap)
1981{
1982 __le16 tmp;
1983
1984 *pos++ = WLAN_EID_HT_CAPABILITY;
1985 *pos++ = sizeof(struct ieee80211_ht_cap);
1986 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1987
1988 /* capability flags */
1989 tmp = cpu_to_le16(cap);
1990 memcpy(pos, &tmp, sizeof(u16));
1991 pos += sizeof(u16);
1992
1993 /* AMPDU parameters */
1994 *pos++ = ht_cap->ampdu_factor |
1995 (ht_cap->ampdu_density <<
1996 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1997
1998 /* MCS set */
1999 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2000 pos += sizeof(ht_cap->mcs);
2001
2002 /* extended capabilities */
2003 pos += sizeof(__le16);
2004
2005 /* BF capabilities */
2006 pos += sizeof(__le32);
2007
2008 /* antenna selection */
2009 pos += sizeof(u8);
2010
2011 return pos;
2012}
2013
2014u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2015 u32 cap)
2016{
2017 __le32 tmp;
2018
2019 *pos++ = WLAN_EID_VHT_CAPABILITY;
2020 *pos++ = sizeof(struct ieee80211_vht_cap);
2021 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2022
2023 /* capability flags */
2024 tmp = cpu_to_le32(cap);
2025 memcpy(pos, &tmp, sizeof(u32));
2026 pos += sizeof(u32);
2027
2028 /* VHT MCS set */
2029 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2030 pos += sizeof(vht_cap->vht_mcs);
2031
2032 return pos;
2033}
2034
2035u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2036 const struct cfg80211_chan_def *chandef,
2037 u16 prot_mode)
2038{
2039 struct ieee80211_ht_operation *ht_oper;
2040 /* Build HT Information */
2041 *pos++ = WLAN_EID_HT_OPERATION;
2042 *pos++ = sizeof(struct ieee80211_ht_operation);
2043 ht_oper = (struct ieee80211_ht_operation *)pos;
2044 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2045 chandef->chan->center_freq);
2046 switch (chandef->width) {
2047 case NL80211_CHAN_WIDTH_160:
2048 case NL80211_CHAN_WIDTH_80P80:
2049 case NL80211_CHAN_WIDTH_80:
2050 case NL80211_CHAN_WIDTH_40:
2051 if (chandef->center_freq1 > chandef->chan->center_freq)
2052 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2053 else
2054 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2055 break;
2056 default:
2057 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2058 break;
2059 }
2060 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2061 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2062 chandef->width != NL80211_CHAN_WIDTH_20)
2063 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2064
2065 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2066 ht_oper->stbc_param = 0x0000;
2067
2068 /* It seems that Basic MCS set and Supported MCS set
2069 are identical for the first 10 bytes */
2070 memset(&ht_oper->basic_set, 0, 16);
2071 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2072
2073 return pos + sizeof(struct ieee80211_ht_operation);
2074}
2075
2076void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2077 const struct ieee80211_ht_operation *ht_oper,
2078 struct cfg80211_chan_def *chandef)
2079{
2080 enum nl80211_channel_type channel_type;
2081
2082 if (!ht_oper) {
2083 cfg80211_chandef_create(chandef, control_chan,
2084 NL80211_CHAN_NO_HT);
2085 return;
2086 }
2087
2088 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2089 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2090 channel_type = NL80211_CHAN_HT20;
2091 break;
2092 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2093 channel_type = NL80211_CHAN_HT40PLUS;
2094 break;
2095 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2096 channel_type = NL80211_CHAN_HT40MINUS;
2097 break;
2098 default:
2099 channel_type = NL80211_CHAN_NO_HT;
2100 }
2101
2102 cfg80211_chandef_create(chandef, control_chan, channel_type);
2103}
2104
2105int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2106 const struct ieee80211_supported_band *sband,
2107 const u8 *srates, int srates_len, u32 *rates)
2108{
2109 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2110 int shift = ieee80211_chandef_get_shift(chandef);
2111 struct ieee80211_rate *br;
2112 int brate, rate, i, j, count = 0;
2113
2114 *rates = 0;
2115
2116 for (i = 0; i < srates_len; i++) {
2117 rate = srates[i] & 0x7f;
2118
2119 for (j = 0; j < sband->n_bitrates; j++) {
2120 br = &sband->bitrates[j];
2121 if ((rate_flags & br->flags) != rate_flags)
2122 continue;
2123
2124 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2125 if (brate == rate) {
2126 *rates |= BIT(j);
2127 count++;
2128 break;
2129 }
2130 }
2131 }
2132 return count;
2133}
2134
2135int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2136 struct sk_buff *skb, bool need_basic,
2137 enum ieee80211_band band)
2138{
2139 struct ieee80211_local *local = sdata->local;
2140 struct ieee80211_supported_band *sband;
2141 int rate, shift;
2142 u8 i, rates, *pos;
2143 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2144 u32 rate_flags;
2145
2146 shift = ieee80211_vif_get_shift(&sdata->vif);
2147 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2148 sband = local->hw.wiphy->bands[band];
2149 rates = 0;
2150 for (i = 0; i < sband->n_bitrates; i++) {
2151 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2152 continue;
2153 rates++;
2154 }
2155 if (rates > 8)
2156 rates = 8;
2157
2158 if (skb_tailroom(skb) < rates + 2)
2159 return -ENOMEM;
2160
2161 pos = skb_put(skb, rates + 2);
2162 *pos++ = WLAN_EID_SUPP_RATES;
2163 *pos++ = rates;
2164 for (i = 0; i < rates; i++) {
2165 u8 basic = 0;
2166 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2167 continue;
2168
2169 if (need_basic && basic_rates & BIT(i))
2170 basic = 0x80;
2171 rate = sband->bitrates[i].bitrate;
2172 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2173 5 * (1 << shift));
2174 *pos++ = basic | (u8) rate;
2175 }
2176
2177 return 0;
2178}
2179
2180int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2181 struct sk_buff *skb, bool need_basic,
2182 enum ieee80211_band band)
2183{
2184 struct ieee80211_local *local = sdata->local;
2185 struct ieee80211_supported_band *sband;
2186 int rate, shift;
2187 u8 i, exrates, *pos;
2188 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2189 u32 rate_flags;
2190
2191 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2192 shift = ieee80211_vif_get_shift(&sdata->vif);
2193
2194 sband = local->hw.wiphy->bands[band];
2195 exrates = 0;
2196 for (i = 0; i < sband->n_bitrates; i++) {
2197 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2198 continue;
2199 exrates++;
2200 }
2201
2202 if (exrates > 8)
2203 exrates -= 8;
2204 else
2205 exrates = 0;
2206
2207 if (skb_tailroom(skb) < exrates + 2)
2208 return -ENOMEM;
2209
2210 if (exrates) {
2211 pos = skb_put(skb, exrates + 2);
2212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2213 *pos++ = exrates;
2214 for (i = 8; i < sband->n_bitrates; i++) {
2215 u8 basic = 0;
2216 if ((rate_flags & sband->bitrates[i].flags)
2217 != rate_flags)
2218 continue;
2219 if (need_basic && basic_rates & BIT(i))
2220 basic = 0x80;
2221 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2222 5 * (1 << shift));
2223 *pos++ = basic | (u8) rate;
2224 }
2225 }
2226 return 0;
2227}
2228
2229int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2230{
2231 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2233
2234 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2235 /* non-managed type inferfaces */
2236 return 0;
2237 }
2238 return ifmgd->ave_beacon_signal / 16;
2239}
2240EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2241
2242u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2243{
2244 if (!mcs)
2245 return 1;
2246
2247 /* TODO: consider rx_highest */
2248
2249 if (mcs->rx_mask[3])
2250 return 4;
2251 if (mcs->rx_mask[2])
2252 return 3;
2253 if (mcs->rx_mask[1])
2254 return 2;
2255 return 1;
2256}
2257
2258/**
2259 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2260 * @local: mac80211 hw info struct
2261 * @status: RX status
2262 * @mpdu_len: total MPDU length (including FCS)
2263 * @mpdu_offset: offset into MPDU to calculate timestamp at
2264 *
2265 * This function calculates the RX timestamp at the given MPDU offset, taking
2266 * into account what the RX timestamp was. An offset of 0 will just normalize
2267 * the timestamp to TSF at beginning of MPDU reception.
2268 */
2269u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2270 struct ieee80211_rx_status *status,
2271 unsigned int mpdu_len,
2272 unsigned int mpdu_offset)
2273{
2274 u64 ts = status->mactime;
2275 struct rate_info ri;
2276 u16 rate;
2277
2278 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2279 return 0;
2280
2281 memset(&ri, 0, sizeof(ri));
2282
2283 /* Fill cfg80211 rate info */
2284 if (status->flag & RX_FLAG_HT) {
2285 ri.mcs = status->rate_idx;
2286 ri.flags |= RATE_INFO_FLAGS_MCS;
2287 if (status->flag & RX_FLAG_40MHZ)
2288 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2289 if (status->flag & RX_FLAG_SHORT_GI)
2290 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2291 } else if (status->flag & RX_FLAG_VHT) {
2292 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2293 ri.mcs = status->rate_idx;
2294 ri.nss = status->vht_nss;
2295 if (status->flag & RX_FLAG_40MHZ)
2296 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2297 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2298 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2299 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2300 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2301 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2302 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2303 if (status->flag & RX_FLAG_SHORT_GI)
2304 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2305 } else {
2306 struct ieee80211_supported_band *sband;
2307 int shift = 0;
2308 int bitrate;
2309
2310 if (status->flag & RX_FLAG_10MHZ)
2311 shift = 1;
2312 if (status->flag & RX_FLAG_5MHZ)
2313 shift = 2;
2314
2315 sband = local->hw.wiphy->bands[status->band];
2316 bitrate = sband->bitrates[status->rate_idx].bitrate;
2317 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2318 }
2319
2320 rate = cfg80211_calculate_bitrate(&ri);
2321 if (WARN_ONCE(!rate,
2322 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2323 status->flag, status->rate_idx, status->vht_nss))
2324 return 0;
2325
2326 /* rewind from end of MPDU */
2327 if (status->flag & RX_FLAG_MACTIME_END)
2328 ts -= mpdu_len * 8 * 10 / rate;
2329
2330 ts += mpdu_offset * 8 * 10 / rate;
2331
2332 return ts;
2333}
2334
2335void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2336{
2337 struct ieee80211_sub_if_data *sdata;
2338 struct cfg80211_chan_def chandef;
2339
2340 mutex_lock(&local->mtx);
2341 mutex_lock(&local->iflist_mtx);
2342 list_for_each_entry(sdata, &local->interfaces, list) {
2343 /* it might be waiting for the local->mtx, but then
2344 * by the time it gets it, sdata->wdev.cac_started
2345 * will no longer be true
2346 */
2347 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2348
2349 if (sdata->wdev.cac_started) {
2350 chandef = sdata->vif.bss_conf.chandef;
2351 ieee80211_vif_release_channel(sdata);
2352 cfg80211_cac_event(sdata->dev,
2353 &chandef,
2354 NL80211_RADAR_CAC_ABORTED,
2355 GFP_KERNEL);
2356 }
2357 }
2358 mutex_unlock(&local->iflist_mtx);
2359 mutex_unlock(&local->mtx);
2360}
2361
2362void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2363{
2364 struct ieee80211_local *local =
2365 container_of(work, struct ieee80211_local, radar_detected_work);
2366 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2367
2368 ieee80211_dfs_cac_cancel(local);
2369
2370 if (local->use_chanctx)
2371 /* currently not handled */
2372 WARN_ON(1);
2373 else
2374 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2375}
2376
2377void ieee80211_radar_detected(struct ieee80211_hw *hw)
2378{
2379 struct ieee80211_local *local = hw_to_local(hw);
2380
2381 trace_api_radar_detected(local);
2382
2383 ieee80211_queue_work(hw, &local->radar_detected_work);
2384}
2385EXPORT_SYMBOL(ieee80211_radar_detected);
2386
2387u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2388{
2389 u32 ret;
2390 int tmp;
2391
2392 switch (c->width) {
2393 case NL80211_CHAN_WIDTH_20:
2394 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2395 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2396 break;
2397 case NL80211_CHAN_WIDTH_40:
2398 c->width = NL80211_CHAN_WIDTH_20;
2399 c->center_freq1 = c->chan->center_freq;
2400 ret = IEEE80211_STA_DISABLE_40MHZ |
2401 IEEE80211_STA_DISABLE_VHT;
2402 break;
2403 case NL80211_CHAN_WIDTH_80:
2404 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2405 /* n_P40 */
2406 tmp /= 2;
2407 /* freq_P40 */
2408 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2409 c->width = NL80211_CHAN_WIDTH_40;
2410 ret = IEEE80211_STA_DISABLE_VHT;
2411 break;
2412 case NL80211_CHAN_WIDTH_80P80:
2413 c->center_freq2 = 0;
2414 c->width = NL80211_CHAN_WIDTH_80;
2415 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2416 IEEE80211_STA_DISABLE_160MHZ;
2417 break;
2418 case NL80211_CHAN_WIDTH_160:
2419 /* n_P20 */
2420 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2421 /* n_P80 */
2422 tmp /= 4;
2423 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2424 c->width = NL80211_CHAN_WIDTH_80;
2425 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2426 IEEE80211_STA_DISABLE_160MHZ;
2427 break;
2428 default:
2429 case NL80211_CHAN_WIDTH_20_NOHT:
2430 WARN_ON_ONCE(1);
2431 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2432 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2433 break;
2434 case NL80211_CHAN_WIDTH_5:
2435 case NL80211_CHAN_WIDTH_10:
2436 WARN_ON_ONCE(1);
2437 /* keep c->width */
2438 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2439 break;
2440 }
2441
2442 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2443
2444 return ret;
2445}
2446
2447/*
2448 * Returns true if smps_mode_new is strictly more restrictive than
2449 * smps_mode_old.
2450 */
2451bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2452 enum ieee80211_smps_mode smps_mode_new)
2453{
2454 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2455 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2456 return false;
2457
2458 switch (smps_mode_old) {
2459 case IEEE80211_SMPS_STATIC:
2460 return false;
2461 case IEEE80211_SMPS_DYNAMIC:
2462 return smps_mode_new == IEEE80211_SMPS_STATIC;
2463 case IEEE80211_SMPS_OFF:
2464 return smps_mode_new != IEEE80211_SMPS_OFF;
2465 default:
2466 WARN_ON(1);
2467 }
2468
2469 return false;
2470}
2471
2472int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2473 struct cfg80211_csa_settings *csa_settings)
2474{
2475 struct sk_buff *skb;
2476 struct ieee80211_mgmt *mgmt;
2477 struct ieee80211_local *local = sdata->local;
2478 int freq;
2479 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2480 sizeof(mgmt->u.action.u.chan_switch);
2481 u8 *pos;
2482
2483 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2484 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2485 return -EOPNOTSUPP;
2486
2487 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2488 5 + /* channel switch announcement element */
2489 3 + /* secondary channel offset element */
2490 8); /* mesh channel switch parameters element */
2491 if (!skb)
2492 return -ENOMEM;
2493
2494 skb_reserve(skb, local->tx_headroom);
2495 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2496 memset(mgmt, 0, hdr_len);
2497 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2498 IEEE80211_STYPE_ACTION);
2499
2500 eth_broadcast_addr(mgmt->da);
2501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2502 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2503 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2504 } else {
2505 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2506 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2507 }
2508 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2509 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2510 pos = skb_put(skb, 5);
2511 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2512 *pos++ = 3; /* IE length */
2513 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2514 freq = csa_settings->chandef.chan->center_freq;
2515 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2516 *pos++ = csa_settings->count; /* count */
2517
2518 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2519 enum nl80211_channel_type ch_type;
2520
2521 skb_put(skb, 3);
2522 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2523 *pos++ = 1; /* IE length */
2524 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2525 if (ch_type == NL80211_CHAN_HT40PLUS)
2526 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2527 else
2528 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2529 }
2530
2531 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2532 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2533
2534 skb_put(skb, 8);
2535 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2536 *pos++ = 6; /* IE length */
2537 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2538 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2539 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2540 *pos++ |= csa_settings->block_tx ?
2541 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2542 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2543 pos += 2;
2544 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2545 pos += 2;
2546 }
2547
2548 ieee80211_tx_skb(sdata, skb);
2549 return 0;
2550}
2551
2552bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2553{
2554 return !(cs == NULL || cs->cipher == 0 ||
2555 cs->hdr_len < cs->pn_len + cs->pn_off ||
2556 cs->hdr_len <= cs->key_idx_off ||
2557 cs->key_idx_shift > 7 ||
2558 cs->key_idx_mask == 0);
2559}
2560
2561bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2562{
2563 int i;
2564
2565 /* Ensure we have enough iftype bitmap space for all iftype values */
2566 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2567
2568 for (i = 0; i < n; i++)
2569 if (!ieee80211_cs_valid(&cs[i]))
2570 return false;
2571
2572 return true;
2573}
2574
2575const struct ieee80211_cipher_scheme *
2576ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2577 enum nl80211_iftype iftype)
2578{
2579 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2580 int n = local->hw.n_cipher_schemes;
2581 int i;
2582 const struct ieee80211_cipher_scheme *cs = NULL;
2583
2584 for (i = 0; i < n; i++) {
2585 if (l[i].cipher == cipher) {
2586 cs = &l[i];
2587 break;
2588 }
2589 }
2590
2591 if (!cs || !(cs->iftype & BIT(iftype)))
2592 return NULL;
2593
2594 return cs;
2595}
2596
2597int ieee80211_cs_headroom(struct ieee80211_local *local,
2598 struct cfg80211_crypto_settings *crypto,
2599 enum nl80211_iftype iftype)
2600{
2601 const struct ieee80211_cipher_scheme *cs;
2602 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2603 int i;
2604
2605 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2606 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2607 iftype);
2608
2609 if (cs && headroom < cs->hdr_len)
2610 headroom = cs->hdr_len;
2611 }
2612
2613 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2614 if (cs && headroom < cs->hdr_len)
2615 headroom = cs->hdr_len;
2616
2617 return headroom;
2618}
2619
2620static bool
2621ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2622{
2623 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2624 int skip;
2625
2626 if (end > 0)
2627 return false;
2628
2629 /* End time is in the past, check for repetitions */
2630 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2631 if (data->count[i] < 255) {
2632 if (data->count[i] <= skip) {
2633 data->count[i] = 0;
2634 return false;
2635 }
2636
2637 data->count[i] -= skip;
2638 }
2639
2640 data->desc[i].start += skip * data->desc[i].interval;
2641
2642 return true;
2643}
2644
2645static bool
2646ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2647 s32 *offset)
2648{
2649 bool ret = false;
2650 int i;
2651
2652 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2653 s32 cur;
2654
2655 if (!data->count[i])
2656 continue;
2657
2658 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2659 ret = true;
2660
2661 cur = data->desc[i].start - tsf;
2662 if (cur > *offset)
2663 continue;
2664
2665 cur = data->desc[i].start + data->desc[i].duration - tsf;
2666 if (cur > *offset)
2667 *offset = cur;
2668 }
2669
2670 return ret;
2671}
2672
2673static u32
2674ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2675{
2676 s32 offset = 0;
2677 int tries = 0;
2678 /*
2679 * arbitrary limit, used to avoid infinite loops when combined NoA
2680 * descriptors cover the full time period.
2681 */
2682 int max_tries = 5;
2683
2684 ieee80211_extend_absent_time(data, tsf, &offset);
2685 do {
2686 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2687 break;
2688
2689 tries++;
2690 } while (tries < max_tries);
2691
2692 return offset;
2693}
2694
2695void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2696{
2697 u32 next_offset = BIT(31) - 1;
2698 int i;
2699
2700 data->absent = 0;
2701 data->has_next_tsf = false;
2702 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2703 s32 start;
2704
2705 if (!data->count[i])
2706 continue;
2707
2708 ieee80211_extend_noa_desc(data, tsf, i);
2709 start = data->desc[i].start - tsf;
2710 if (start <= 0)
2711 data->absent |= BIT(i);
2712
2713 if (next_offset > start)
2714 next_offset = start;
2715
2716 data->has_next_tsf = true;
2717 }
2718
2719 if (data->absent)
2720 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2721
2722 data->next_tsf = tsf + next_offset;
2723}
2724EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2725
2726int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2727 struct ieee80211_noa_data *data, u32 tsf)
2728{
2729 int ret = 0;
2730 int i;
2731
2732 memset(data, 0, sizeof(*data));
2733
2734 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2735 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2736
2737 if (!desc->count || !desc->duration)
2738 continue;
2739
2740 data->count[i] = desc->count;
2741 data->desc[i].start = le32_to_cpu(desc->start_time);
2742 data->desc[i].duration = le32_to_cpu(desc->duration);
2743 data->desc[i].interval = le32_to_cpu(desc->interval);
2744
2745 if (data->count[i] > 1 &&
2746 data->desc[i].interval < data->desc[i].duration)
2747 continue;
2748
2749 ieee80211_extend_noa_desc(data, tsf, i);
2750 ret++;
2751 }
2752
2753 if (ret)
2754 ieee80211_update_p2p_noa(data, tsf);
2755
2756 return ret;
2757}
2758EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2759
2760void ieee80211_recalc_dtim(struct ieee80211_local *local,
2761 struct ieee80211_sub_if_data *sdata)
2762{
2763 u64 tsf = drv_get_tsf(local, sdata);
2764 u64 dtim_count = 0;
2765 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2766 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2767 struct ps_data *ps;
2768 u8 bcns_from_dtim;
2769
2770 if (tsf == -1ULL || !beacon_int || !dtim_period)
2771 return;
2772
2773 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2774 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2775 if (!sdata->bss)
2776 return;
2777
2778 ps = &sdata->bss->ps;
2779 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2780 ps = &sdata->u.mesh.ps;
2781 } else {
2782 return;
2783 }
2784
2785 /*
2786 * actually finds last dtim_count, mac80211 will update in
2787 * __beacon_add_tim().
2788 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2789 */
2790 do_div(tsf, beacon_int);
2791 bcns_from_dtim = do_div(tsf, dtim_period);
2792 /* just had a DTIM */
2793 if (!bcns_from_dtim)
2794 dtim_count = 0;
2795 else
2796 dtim_count = dtim_period - bcns_from_dtim;
2797
2798 ps->dtim_count = dtim_count;
2799}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2019 Intel Corporation
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/export.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
22#include <linux/bitmap.h>
23#include <linux/crc32.h>
24#include <net/net_namespace.h>
25#include <net/cfg80211.h>
26#include <net/rtnetlink.h>
27
28#include "ieee80211_i.h"
29#include "driver-ops.h"
30#include "rate.h"
31#include "mesh.h"
32#include "wme.h"
33#include "led.h"
34#include "wep.h"
35
36/* privid for wiphys to determine whether they belong to us or not */
37const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
50{
51 struct sk_buff *skb;
52 struct ieee80211_hdr *hdr;
53
54 skb_queue_walk(&tx->skbs, skb) {
55 hdr = (struct ieee80211_hdr *) skb->data;
56 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
57 }
58}
59
60int ieee80211_frame_duration(enum nl80211_band band, size_t len,
61 int rate, int erp, int short_preamble,
62 int shift)
63{
64 int dur;
65
66 /* calculate duration (in microseconds, rounded up to next higher
67 * integer if it includes a fractional microsecond) to send frame of
68 * len bytes (does not include FCS) at the given rate. Duration will
69 * also include SIFS.
70 *
71 * rate is in 100 kbps, so divident is multiplied by 10 in the
72 * DIV_ROUND_UP() operations.
73 *
74 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
75 * is assumed to be 0 otherwise.
76 */
77
78 if (band == NL80211_BAND_5GHZ || erp) {
79 /*
80 * OFDM:
81 *
82 * N_DBPS = DATARATE x 4
83 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
84 * (16 = SIGNAL time, 6 = tail bits)
85 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
86 *
87 * T_SYM = 4 usec
88 * 802.11a - 18.5.2: aSIFSTime = 16 usec
89 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
90 * signal ext = 6 usec
91 */
92 dur = 16; /* SIFS + signal ext */
93 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
94 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
95
96 /* IEEE 802.11-2012 18.3.2.4: all values above are:
97 * * times 4 for 5 MHz
98 * * times 2 for 10 MHz
99 */
100 dur *= 1 << shift;
101
102 /* rates should already consider the channel bandwidth,
103 * don't apply divisor again.
104 */
105 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
106 4 * rate); /* T_SYM x N_SYM */
107 } else {
108 /*
109 * 802.11b or 802.11g with 802.11b compatibility:
110 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
111 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
112 *
113 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
114 * aSIFSTime = 10 usec
115 * aPreambleLength = 144 usec or 72 usec with short preamble
116 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
117 */
118 dur = 10; /* aSIFSTime = 10 usec */
119 dur += short_preamble ? (72 + 24) : (144 + 48);
120
121 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
122 }
123
124 return dur;
125}
126
127/* Exported duration function for driver use */
128__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
129 struct ieee80211_vif *vif,
130 enum nl80211_band band,
131 size_t frame_len,
132 struct ieee80211_rate *rate)
133{
134 struct ieee80211_sub_if_data *sdata;
135 u16 dur;
136 int erp, shift = 0;
137 bool short_preamble = false;
138
139 erp = 0;
140 if (vif) {
141 sdata = vif_to_sdata(vif);
142 short_preamble = sdata->vif.bss_conf.use_short_preamble;
143 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
144 erp = rate->flags & IEEE80211_RATE_ERP_G;
145 shift = ieee80211_vif_get_shift(vif);
146 }
147
148 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
149 short_preamble, shift);
150
151 return cpu_to_le16(dur);
152}
153EXPORT_SYMBOL(ieee80211_generic_frame_duration);
154
155__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
156 struct ieee80211_vif *vif, size_t frame_len,
157 const struct ieee80211_tx_info *frame_txctl)
158{
159 struct ieee80211_local *local = hw_to_local(hw);
160 struct ieee80211_rate *rate;
161 struct ieee80211_sub_if_data *sdata;
162 bool short_preamble;
163 int erp, shift = 0, bitrate;
164 u16 dur;
165 struct ieee80211_supported_band *sband;
166
167 sband = local->hw.wiphy->bands[frame_txctl->band];
168
169 short_preamble = false;
170
171 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
172
173 erp = 0;
174 if (vif) {
175 sdata = vif_to_sdata(vif);
176 short_preamble = sdata->vif.bss_conf.use_short_preamble;
177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
178 erp = rate->flags & IEEE80211_RATE_ERP_G;
179 shift = ieee80211_vif_get_shift(vif);
180 }
181
182 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
183
184 /* CTS duration */
185 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
186 erp, short_preamble, shift);
187 /* Data frame duration */
188 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
189 erp, short_preamble, shift);
190 /* ACK duration */
191 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
192 erp, short_preamble, shift);
193
194 return cpu_to_le16(dur);
195}
196EXPORT_SYMBOL(ieee80211_rts_duration);
197
198__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
199 struct ieee80211_vif *vif,
200 size_t frame_len,
201 const struct ieee80211_tx_info *frame_txctl)
202{
203 struct ieee80211_local *local = hw_to_local(hw);
204 struct ieee80211_rate *rate;
205 struct ieee80211_sub_if_data *sdata;
206 bool short_preamble;
207 int erp, shift = 0, bitrate;
208 u16 dur;
209 struct ieee80211_supported_band *sband;
210
211 sband = local->hw.wiphy->bands[frame_txctl->band];
212
213 short_preamble = false;
214
215 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
216 erp = 0;
217 if (vif) {
218 sdata = vif_to_sdata(vif);
219 short_preamble = sdata->vif.bss_conf.use_short_preamble;
220 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
221 erp = rate->flags & IEEE80211_RATE_ERP_G;
222 shift = ieee80211_vif_get_shift(vif);
223 }
224
225 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
226
227 /* Data frame duration */
228 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
229 erp, short_preamble, shift);
230 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
231 /* ACK duration */
232 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
233 erp, short_preamble, shift);
234 }
235
236 return cpu_to_le16(dur);
237}
238EXPORT_SYMBOL(ieee80211_ctstoself_duration);
239
240static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
241{
242 struct ieee80211_local *local = sdata->local;
243 struct ieee80211_vif *vif = &sdata->vif;
244 struct fq *fq = &local->fq;
245 struct ps_data *ps = NULL;
246 struct txq_info *txqi;
247 struct sta_info *sta;
248 int i;
249
250 local_bh_disable();
251 spin_lock(&fq->lock);
252
253 if (sdata->vif.type == NL80211_IFTYPE_AP)
254 ps = &sdata->bss->ps;
255
256 sdata->vif.txqs_stopped[ac] = false;
257
258 list_for_each_entry_rcu(sta, &local->sta_list, list) {
259 if (sdata != sta->sdata)
260 continue;
261
262 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
263 struct ieee80211_txq *txq = sta->sta.txq[i];
264
265 if (!txq)
266 continue;
267
268 txqi = to_txq_info(txq);
269
270 if (ac != txq->ac)
271 continue;
272
273 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
274 &txqi->flags))
275 continue;
276
277 spin_unlock(&fq->lock);
278 drv_wake_tx_queue(local, txqi);
279 spin_lock(&fq->lock);
280 }
281 }
282
283 if (!vif->txq)
284 goto out;
285
286 txqi = to_txq_info(vif->txq);
287
288 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
289 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
290 goto out;
291
292 spin_unlock(&fq->lock);
293
294 drv_wake_tx_queue(local, txqi);
295 local_bh_enable();
296 return;
297out:
298 spin_unlock(&fq->lock);
299 local_bh_enable();
300}
301
302static void
303__releases(&local->queue_stop_reason_lock)
304__acquires(&local->queue_stop_reason_lock)
305_ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
306{
307 struct ieee80211_sub_if_data *sdata;
308 int n_acs = IEEE80211_NUM_ACS;
309 int i;
310
311 rcu_read_lock();
312
313 if (local->hw.queues < IEEE80211_NUM_ACS)
314 n_acs = 1;
315
316 for (i = 0; i < local->hw.queues; i++) {
317 if (local->queue_stop_reasons[i])
318 continue;
319
320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
321 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
322 int ac;
323
324 for (ac = 0; ac < n_acs; ac++) {
325 int ac_queue = sdata->vif.hw_queue[ac];
326
327 if (ac_queue == i ||
328 sdata->vif.cab_queue == i)
329 __ieee80211_wake_txqs(sdata, ac);
330 }
331 }
332 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
333 }
334
335 rcu_read_unlock();
336}
337
338void ieee80211_wake_txqs(unsigned long data)
339{
340 struct ieee80211_local *local = (struct ieee80211_local *)data;
341 unsigned long flags;
342
343 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
344 _ieee80211_wake_txqs(local, &flags);
345 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
346}
347
348void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
349{
350 struct ieee80211_sub_if_data *sdata;
351 int n_acs = IEEE80211_NUM_ACS;
352
353 if (local->ops->wake_tx_queue)
354 return;
355
356 if (local->hw.queues < IEEE80211_NUM_ACS)
357 n_acs = 1;
358
359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
360 int ac;
361
362 if (!sdata->dev)
363 continue;
364
365 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
366 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
367 continue;
368
369 for (ac = 0; ac < n_acs; ac++) {
370 int ac_queue = sdata->vif.hw_queue[ac];
371
372 if (ac_queue == queue ||
373 (sdata->vif.cab_queue == queue &&
374 local->queue_stop_reasons[ac_queue] == 0 &&
375 skb_queue_empty(&local->pending[ac_queue])))
376 netif_wake_subqueue(sdata->dev, ac);
377 }
378 }
379}
380
381static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
382 enum queue_stop_reason reason,
383 bool refcounted,
384 unsigned long *flags)
385{
386 struct ieee80211_local *local = hw_to_local(hw);
387
388 trace_wake_queue(local, queue, reason);
389
390 if (WARN_ON(queue >= hw->queues))
391 return;
392
393 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
394 return;
395
396 if (!refcounted) {
397 local->q_stop_reasons[queue][reason] = 0;
398 } else {
399 local->q_stop_reasons[queue][reason]--;
400 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
401 local->q_stop_reasons[queue][reason] = 0;
402 }
403
404 if (local->q_stop_reasons[queue][reason] == 0)
405 __clear_bit(reason, &local->queue_stop_reasons[queue]);
406
407 if (local->queue_stop_reasons[queue] != 0)
408 /* someone still has this queue stopped */
409 return;
410
411 if (skb_queue_empty(&local->pending[queue])) {
412 rcu_read_lock();
413 ieee80211_propagate_queue_wake(local, queue);
414 rcu_read_unlock();
415 } else
416 tasklet_schedule(&local->tx_pending_tasklet);
417
418 /*
419 * Calling _ieee80211_wake_txqs here can be a problem because it may
420 * release queue_stop_reason_lock which has been taken by
421 * __ieee80211_wake_queue's caller. It is certainly not very nice to
422 * release someone's lock, but it is fine because all the callers of
423 * __ieee80211_wake_queue call it right before releasing the lock.
424 */
425 if (local->ops->wake_tx_queue) {
426 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
427 tasklet_schedule(&local->wake_txqs_tasklet);
428 else
429 _ieee80211_wake_txqs(local, flags);
430 }
431}
432
433void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
435 bool refcounted)
436{
437 struct ieee80211_local *local = hw_to_local(hw);
438 unsigned long flags;
439
440 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
441 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
443}
444
445void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
446{
447 ieee80211_wake_queue_by_reason(hw, queue,
448 IEEE80211_QUEUE_STOP_REASON_DRIVER,
449 false);
450}
451EXPORT_SYMBOL(ieee80211_wake_queue);
452
453static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
454 enum queue_stop_reason reason,
455 bool refcounted)
456{
457 struct ieee80211_local *local = hw_to_local(hw);
458 struct ieee80211_sub_if_data *sdata;
459 int n_acs = IEEE80211_NUM_ACS;
460
461 trace_stop_queue(local, queue, reason);
462
463 if (WARN_ON(queue >= hw->queues))
464 return;
465
466 if (!refcounted)
467 local->q_stop_reasons[queue][reason] = 1;
468 else
469 local->q_stop_reasons[queue][reason]++;
470
471 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
472 return;
473
474 if (local->hw.queues < IEEE80211_NUM_ACS)
475 n_acs = 1;
476
477 rcu_read_lock();
478 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
479 int ac;
480
481 if (!sdata->dev)
482 continue;
483
484 for (ac = 0; ac < n_acs; ac++) {
485 if (sdata->vif.hw_queue[ac] == queue ||
486 sdata->vif.cab_queue == queue) {
487 if (!local->ops->wake_tx_queue) {
488 netif_stop_subqueue(sdata->dev, ac);
489 continue;
490 }
491 spin_lock(&local->fq.lock);
492 sdata->vif.txqs_stopped[ac] = true;
493 spin_unlock(&local->fq.lock);
494 }
495 }
496 }
497 rcu_read_unlock();
498}
499
500void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
501 enum queue_stop_reason reason,
502 bool refcounted)
503{
504 struct ieee80211_local *local = hw_to_local(hw);
505 unsigned long flags;
506
507 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
508 __ieee80211_stop_queue(hw, queue, reason, refcounted);
509 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
510}
511
512void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
513{
514 ieee80211_stop_queue_by_reason(hw, queue,
515 IEEE80211_QUEUE_STOP_REASON_DRIVER,
516 false);
517}
518EXPORT_SYMBOL(ieee80211_stop_queue);
519
520void ieee80211_add_pending_skb(struct ieee80211_local *local,
521 struct sk_buff *skb)
522{
523 struct ieee80211_hw *hw = &local->hw;
524 unsigned long flags;
525 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
526 int queue = info->hw_queue;
527
528 if (WARN_ON(!info->control.vif)) {
529 ieee80211_free_txskb(&local->hw, skb);
530 return;
531 }
532
533 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
534 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
535 false);
536 __skb_queue_tail(&local->pending[queue], skb);
537 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
538 false, &flags);
539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
540}
541
542void ieee80211_add_pending_skbs(struct ieee80211_local *local,
543 struct sk_buff_head *skbs)
544{
545 struct ieee80211_hw *hw = &local->hw;
546 struct sk_buff *skb;
547 unsigned long flags;
548 int queue, i;
549
550 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
551 while ((skb = skb_dequeue(skbs))) {
552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553
554 if (WARN_ON(!info->control.vif)) {
555 ieee80211_free_txskb(&local->hw, skb);
556 continue;
557 }
558
559 queue = info->hw_queue;
560
561 __ieee80211_stop_queue(hw, queue,
562 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
563 false);
564
565 __skb_queue_tail(&local->pending[queue], skb);
566 }
567
568 for (i = 0; i < hw->queues; i++)
569 __ieee80211_wake_queue(hw, i,
570 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
571 false, &flags);
572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
573}
574
575void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
576 unsigned long queues,
577 enum queue_stop_reason reason,
578 bool refcounted)
579{
580 struct ieee80211_local *local = hw_to_local(hw);
581 unsigned long flags;
582 int i;
583
584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
585
586 for_each_set_bit(i, &queues, hw->queues)
587 __ieee80211_stop_queue(hw, i, reason, refcounted);
588
589 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
590}
591
592void ieee80211_stop_queues(struct ieee80211_hw *hw)
593{
594 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
595 IEEE80211_QUEUE_STOP_REASON_DRIVER,
596 false);
597}
598EXPORT_SYMBOL(ieee80211_stop_queues);
599
600int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
601{
602 struct ieee80211_local *local = hw_to_local(hw);
603 unsigned long flags;
604 int ret;
605
606 if (WARN_ON(queue >= hw->queues))
607 return true;
608
609 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
610 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
611 &local->queue_stop_reasons[queue]);
612 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
613 return ret;
614}
615EXPORT_SYMBOL(ieee80211_queue_stopped);
616
617void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
618 unsigned long queues,
619 enum queue_stop_reason reason,
620 bool refcounted)
621{
622 struct ieee80211_local *local = hw_to_local(hw);
623 unsigned long flags;
624 int i;
625
626 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
627
628 for_each_set_bit(i, &queues, hw->queues)
629 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
630
631 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
632}
633
634void ieee80211_wake_queues(struct ieee80211_hw *hw)
635{
636 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
637 IEEE80211_QUEUE_STOP_REASON_DRIVER,
638 false);
639}
640EXPORT_SYMBOL(ieee80211_wake_queues);
641
642static unsigned int
643ieee80211_get_vif_queues(struct ieee80211_local *local,
644 struct ieee80211_sub_if_data *sdata)
645{
646 unsigned int queues;
647
648 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
649 int ac;
650
651 queues = 0;
652
653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
654 queues |= BIT(sdata->vif.hw_queue[ac]);
655 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
656 queues |= BIT(sdata->vif.cab_queue);
657 } else {
658 /* all queues */
659 queues = BIT(local->hw.queues) - 1;
660 }
661
662 return queues;
663}
664
665void __ieee80211_flush_queues(struct ieee80211_local *local,
666 struct ieee80211_sub_if_data *sdata,
667 unsigned int queues, bool drop)
668{
669 if (!local->ops->flush)
670 return;
671
672 /*
673 * If no queue was set, or if the HW doesn't support
674 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
675 */
676 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
677 queues = ieee80211_get_vif_queues(local, sdata);
678
679 ieee80211_stop_queues_by_reason(&local->hw, queues,
680 IEEE80211_QUEUE_STOP_REASON_FLUSH,
681 false);
682
683 drv_flush(local, sdata, queues, drop);
684
685 ieee80211_wake_queues_by_reason(&local->hw, queues,
686 IEEE80211_QUEUE_STOP_REASON_FLUSH,
687 false);
688}
689
690void ieee80211_flush_queues(struct ieee80211_local *local,
691 struct ieee80211_sub_if_data *sdata, bool drop)
692{
693 __ieee80211_flush_queues(local, sdata, 0, drop);
694}
695
696void ieee80211_stop_vif_queues(struct ieee80211_local *local,
697 struct ieee80211_sub_if_data *sdata,
698 enum queue_stop_reason reason)
699{
700 ieee80211_stop_queues_by_reason(&local->hw,
701 ieee80211_get_vif_queues(local, sdata),
702 reason, true);
703}
704
705void ieee80211_wake_vif_queues(struct ieee80211_local *local,
706 struct ieee80211_sub_if_data *sdata,
707 enum queue_stop_reason reason)
708{
709 ieee80211_wake_queues_by_reason(&local->hw,
710 ieee80211_get_vif_queues(local, sdata),
711 reason, true);
712}
713
714static void __iterate_interfaces(struct ieee80211_local *local,
715 u32 iter_flags,
716 void (*iterator)(void *data, u8 *mac,
717 struct ieee80211_vif *vif),
718 void *data)
719{
720 struct ieee80211_sub_if_data *sdata;
721 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
722
723 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
724 switch (sdata->vif.type) {
725 case NL80211_IFTYPE_MONITOR:
726 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
727 continue;
728 break;
729 case NL80211_IFTYPE_AP_VLAN:
730 continue;
731 default:
732 break;
733 }
734 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
735 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
736 continue;
737 if (ieee80211_sdata_running(sdata) || !active_only)
738 iterator(data, sdata->vif.addr,
739 &sdata->vif);
740 }
741
742 sdata = rcu_dereference_check(local->monitor_sdata,
743 lockdep_is_held(&local->iflist_mtx) ||
744 lockdep_rtnl_is_held());
745 if (sdata &&
746 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
747 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
748 iterator(data, sdata->vif.addr, &sdata->vif);
749}
750
751void ieee80211_iterate_interfaces(
752 struct ieee80211_hw *hw, u32 iter_flags,
753 void (*iterator)(void *data, u8 *mac,
754 struct ieee80211_vif *vif),
755 void *data)
756{
757 struct ieee80211_local *local = hw_to_local(hw);
758
759 mutex_lock(&local->iflist_mtx);
760 __iterate_interfaces(local, iter_flags, iterator, data);
761 mutex_unlock(&local->iflist_mtx);
762}
763EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
764
765void ieee80211_iterate_active_interfaces_atomic(
766 struct ieee80211_hw *hw, u32 iter_flags,
767 void (*iterator)(void *data, u8 *mac,
768 struct ieee80211_vif *vif),
769 void *data)
770{
771 struct ieee80211_local *local = hw_to_local(hw);
772
773 rcu_read_lock();
774 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
775 iterator, data);
776 rcu_read_unlock();
777}
778EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
779
780void ieee80211_iterate_active_interfaces_rtnl(
781 struct ieee80211_hw *hw, u32 iter_flags,
782 void (*iterator)(void *data, u8 *mac,
783 struct ieee80211_vif *vif),
784 void *data)
785{
786 struct ieee80211_local *local = hw_to_local(hw);
787
788 ASSERT_RTNL();
789
790 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
791 iterator, data);
792}
793EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
794
795static void __iterate_stations(struct ieee80211_local *local,
796 void (*iterator)(void *data,
797 struct ieee80211_sta *sta),
798 void *data)
799{
800 struct sta_info *sta;
801
802 list_for_each_entry_rcu(sta, &local->sta_list, list) {
803 if (!sta->uploaded)
804 continue;
805
806 iterator(data, &sta->sta);
807 }
808}
809
810void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
811 void (*iterator)(void *data,
812 struct ieee80211_sta *sta),
813 void *data)
814{
815 struct ieee80211_local *local = hw_to_local(hw);
816
817 rcu_read_lock();
818 __iterate_stations(local, iterator, data);
819 rcu_read_unlock();
820}
821EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
822
823struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
824{
825 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
826
827 if (!ieee80211_sdata_running(sdata) ||
828 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
829 return NULL;
830 return &sdata->vif;
831}
832EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
833
834struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
835{
836 struct ieee80211_sub_if_data *sdata;
837
838 if (!vif)
839 return NULL;
840
841 sdata = vif_to_sdata(vif);
842
843 if (!ieee80211_sdata_running(sdata) ||
844 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
845 return NULL;
846
847 return &sdata->wdev;
848}
849EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
850
851/*
852 * Nothing should have been stuffed into the workqueue during
853 * the suspend->resume cycle. Since we can't check each caller
854 * of this function if we are already quiescing / suspended,
855 * check here and don't WARN since this can actually happen when
856 * the rx path (for example) is racing against __ieee80211_suspend
857 * and suspending / quiescing was set after the rx path checked
858 * them.
859 */
860static bool ieee80211_can_queue_work(struct ieee80211_local *local)
861{
862 if (local->quiescing || (local->suspended && !local->resuming)) {
863 pr_warn("queueing ieee80211 work while going to suspend\n");
864 return false;
865 }
866
867 return true;
868}
869
870void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
871{
872 struct ieee80211_local *local = hw_to_local(hw);
873
874 if (!ieee80211_can_queue_work(local))
875 return;
876
877 queue_work(local->workqueue, work);
878}
879EXPORT_SYMBOL(ieee80211_queue_work);
880
881void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
882 struct delayed_work *dwork,
883 unsigned long delay)
884{
885 struct ieee80211_local *local = hw_to_local(hw);
886
887 if (!ieee80211_can_queue_work(local))
888 return;
889
890 queue_delayed_work(local->workqueue, dwork, delay);
891}
892EXPORT_SYMBOL(ieee80211_queue_delayed_work);
893
894static u32
895_ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
896 struct ieee802_11_elems *elems,
897 u64 filter, u32 crc,
898 const struct element *check_inherit)
899{
900 const struct element *elem;
901 bool calc_crc = filter != 0;
902 DECLARE_BITMAP(seen_elems, 256);
903 const u8 *ie;
904
905 bitmap_zero(seen_elems, 256);
906
907 for_each_element(elem, start, len) {
908 bool elem_parse_failed;
909 u8 id = elem->id;
910 u8 elen = elem->datalen;
911 const u8 *pos = elem->data;
912
913 if (check_inherit &&
914 !cfg80211_is_element_inherited(elem,
915 check_inherit))
916 continue;
917
918 switch (id) {
919 case WLAN_EID_SSID:
920 case WLAN_EID_SUPP_RATES:
921 case WLAN_EID_FH_PARAMS:
922 case WLAN_EID_DS_PARAMS:
923 case WLAN_EID_CF_PARAMS:
924 case WLAN_EID_TIM:
925 case WLAN_EID_IBSS_PARAMS:
926 case WLAN_EID_CHALLENGE:
927 case WLAN_EID_RSN:
928 case WLAN_EID_ERP_INFO:
929 case WLAN_EID_EXT_SUPP_RATES:
930 case WLAN_EID_HT_CAPABILITY:
931 case WLAN_EID_HT_OPERATION:
932 case WLAN_EID_VHT_CAPABILITY:
933 case WLAN_EID_VHT_OPERATION:
934 case WLAN_EID_MESH_ID:
935 case WLAN_EID_MESH_CONFIG:
936 case WLAN_EID_PEER_MGMT:
937 case WLAN_EID_PREQ:
938 case WLAN_EID_PREP:
939 case WLAN_EID_PERR:
940 case WLAN_EID_RANN:
941 case WLAN_EID_CHANNEL_SWITCH:
942 case WLAN_EID_EXT_CHANSWITCH_ANN:
943 case WLAN_EID_COUNTRY:
944 case WLAN_EID_PWR_CONSTRAINT:
945 case WLAN_EID_TIMEOUT_INTERVAL:
946 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
947 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
948 case WLAN_EID_CHAN_SWITCH_PARAM:
949 case WLAN_EID_EXT_CAPABILITY:
950 case WLAN_EID_CHAN_SWITCH_TIMING:
951 case WLAN_EID_LINK_ID:
952 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
953 /*
954 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
955 * that if the content gets bigger it might be needed more than once
956 */
957 if (test_bit(id, seen_elems)) {
958 elems->parse_error = true;
959 continue;
960 }
961 break;
962 }
963
964 if (calc_crc && id < 64 && (filter & (1ULL << id)))
965 crc = crc32_be(crc, pos - 2, elen + 2);
966
967 elem_parse_failed = false;
968
969 switch (id) {
970 case WLAN_EID_LINK_ID:
971 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
972 elem_parse_failed = true;
973 break;
974 }
975 elems->lnk_id = (void *)(pos - 2);
976 break;
977 case WLAN_EID_CHAN_SWITCH_TIMING:
978 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
979 elem_parse_failed = true;
980 break;
981 }
982 elems->ch_sw_timing = (void *)pos;
983 break;
984 case WLAN_EID_EXT_CAPABILITY:
985 elems->ext_capab = pos;
986 elems->ext_capab_len = elen;
987 break;
988 case WLAN_EID_SSID:
989 elems->ssid = pos;
990 elems->ssid_len = elen;
991 break;
992 case WLAN_EID_SUPP_RATES:
993 elems->supp_rates = pos;
994 elems->supp_rates_len = elen;
995 break;
996 case WLAN_EID_DS_PARAMS:
997 if (elen >= 1)
998 elems->ds_params = pos;
999 else
1000 elem_parse_failed = true;
1001 break;
1002 case WLAN_EID_TIM:
1003 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1004 elems->tim = (void *)pos;
1005 elems->tim_len = elen;
1006 } else
1007 elem_parse_failed = true;
1008 break;
1009 case WLAN_EID_CHALLENGE:
1010 elems->challenge = pos;
1011 elems->challenge_len = elen;
1012 break;
1013 case WLAN_EID_VENDOR_SPECIFIC:
1014 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1015 pos[2] == 0xf2) {
1016 /* Microsoft OUI (00:50:F2) */
1017
1018 if (calc_crc)
1019 crc = crc32_be(crc, pos - 2, elen + 2);
1020
1021 if (elen >= 5 && pos[3] == 2) {
1022 /* OUI Type 2 - WMM IE */
1023 if (pos[4] == 0) {
1024 elems->wmm_info = pos;
1025 elems->wmm_info_len = elen;
1026 } else if (pos[4] == 1) {
1027 elems->wmm_param = pos;
1028 elems->wmm_param_len = elen;
1029 }
1030 }
1031 }
1032 break;
1033 case WLAN_EID_RSN:
1034 elems->rsn = pos;
1035 elems->rsn_len = elen;
1036 break;
1037 case WLAN_EID_ERP_INFO:
1038 if (elen >= 1)
1039 elems->erp_info = pos;
1040 else
1041 elem_parse_failed = true;
1042 break;
1043 case WLAN_EID_EXT_SUPP_RATES:
1044 elems->ext_supp_rates = pos;
1045 elems->ext_supp_rates_len = elen;
1046 break;
1047 case WLAN_EID_HT_CAPABILITY:
1048 if (elen >= sizeof(struct ieee80211_ht_cap))
1049 elems->ht_cap_elem = (void *)pos;
1050 else
1051 elem_parse_failed = true;
1052 break;
1053 case WLAN_EID_HT_OPERATION:
1054 if (elen >= sizeof(struct ieee80211_ht_operation))
1055 elems->ht_operation = (void *)pos;
1056 else
1057 elem_parse_failed = true;
1058 break;
1059 case WLAN_EID_VHT_CAPABILITY:
1060 if (elen >= sizeof(struct ieee80211_vht_cap))
1061 elems->vht_cap_elem = (void *)pos;
1062 else
1063 elem_parse_failed = true;
1064 break;
1065 case WLAN_EID_VHT_OPERATION:
1066 if (elen >= sizeof(struct ieee80211_vht_operation))
1067 elems->vht_operation = (void *)pos;
1068 else
1069 elem_parse_failed = true;
1070 break;
1071 case WLAN_EID_OPMODE_NOTIF:
1072 if (elen > 0)
1073 elems->opmode_notif = pos;
1074 else
1075 elem_parse_failed = true;
1076 break;
1077 case WLAN_EID_MESH_ID:
1078 elems->mesh_id = pos;
1079 elems->mesh_id_len = elen;
1080 break;
1081 case WLAN_EID_MESH_CONFIG:
1082 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1083 elems->mesh_config = (void *)pos;
1084 else
1085 elem_parse_failed = true;
1086 break;
1087 case WLAN_EID_PEER_MGMT:
1088 elems->peering = pos;
1089 elems->peering_len = elen;
1090 break;
1091 case WLAN_EID_MESH_AWAKE_WINDOW:
1092 if (elen >= 2)
1093 elems->awake_window = (void *)pos;
1094 break;
1095 case WLAN_EID_PREQ:
1096 elems->preq = pos;
1097 elems->preq_len = elen;
1098 break;
1099 case WLAN_EID_PREP:
1100 elems->prep = pos;
1101 elems->prep_len = elen;
1102 break;
1103 case WLAN_EID_PERR:
1104 elems->perr = pos;
1105 elems->perr_len = elen;
1106 break;
1107 case WLAN_EID_RANN:
1108 if (elen >= sizeof(struct ieee80211_rann_ie))
1109 elems->rann = (void *)pos;
1110 else
1111 elem_parse_failed = true;
1112 break;
1113 case WLAN_EID_CHANNEL_SWITCH:
1114 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1115 elem_parse_failed = true;
1116 break;
1117 }
1118 elems->ch_switch_ie = (void *)pos;
1119 break;
1120 case WLAN_EID_EXT_CHANSWITCH_ANN:
1121 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1122 elem_parse_failed = true;
1123 break;
1124 }
1125 elems->ext_chansw_ie = (void *)pos;
1126 break;
1127 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1128 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1129 elem_parse_failed = true;
1130 break;
1131 }
1132 elems->sec_chan_offs = (void *)pos;
1133 break;
1134 case WLAN_EID_CHAN_SWITCH_PARAM:
1135 if (elen !=
1136 sizeof(*elems->mesh_chansw_params_ie)) {
1137 elem_parse_failed = true;
1138 break;
1139 }
1140 elems->mesh_chansw_params_ie = (void *)pos;
1141 break;
1142 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1143 if (!action ||
1144 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1145 elem_parse_failed = true;
1146 break;
1147 }
1148 elems->wide_bw_chansw_ie = (void *)pos;
1149 break;
1150 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1151 if (action) {
1152 elem_parse_failed = true;
1153 break;
1154 }
1155 /*
1156 * This is a bit tricky, but as we only care about
1157 * the wide bandwidth channel switch element, so
1158 * just parse it out manually.
1159 */
1160 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1161 pos, elen);
1162 if (ie) {
1163 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1164 elems->wide_bw_chansw_ie =
1165 (void *)(ie + 2);
1166 else
1167 elem_parse_failed = true;
1168 }
1169 break;
1170 case WLAN_EID_COUNTRY:
1171 elems->country_elem = pos;
1172 elems->country_elem_len = elen;
1173 break;
1174 case WLAN_EID_PWR_CONSTRAINT:
1175 if (elen != 1) {
1176 elem_parse_failed = true;
1177 break;
1178 }
1179 elems->pwr_constr_elem = pos;
1180 break;
1181 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1182 /* Lots of different options exist, but we only care
1183 * about the Dynamic Transmit Power Control element.
1184 * First check for the Cisco OUI, then for the DTPC
1185 * tag (0x00).
1186 */
1187 if (elen < 4) {
1188 elem_parse_failed = true;
1189 break;
1190 }
1191
1192 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1193 pos[2] != 0x96 || pos[3] != 0x00)
1194 break;
1195
1196 if (elen != 6) {
1197 elem_parse_failed = true;
1198 break;
1199 }
1200
1201 if (calc_crc)
1202 crc = crc32_be(crc, pos - 2, elen + 2);
1203
1204 elems->cisco_dtpc_elem = pos;
1205 break;
1206 case WLAN_EID_ADDBA_EXT:
1207 if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1208 elem_parse_failed = true;
1209 break;
1210 }
1211 elems->addba_ext_ie = (void *)pos;
1212 break;
1213 case WLAN_EID_TIMEOUT_INTERVAL:
1214 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1215 elems->timeout_int = (void *)pos;
1216 else
1217 elem_parse_failed = true;
1218 break;
1219 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1220 if (elen >= sizeof(*elems->max_idle_period_ie))
1221 elems->max_idle_period_ie = (void *)pos;
1222 break;
1223 case WLAN_EID_EXTENSION:
1224 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1225 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1226 elems->mu_edca_param_set = (void *)&pos[1];
1227 if (calc_crc)
1228 crc = crc32_be(crc, pos - 2, elen + 2);
1229 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1230 elems->he_cap = (void *)&pos[1];
1231 elems->he_cap_len = elen - 1;
1232 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1233 elen >= sizeof(*elems->he_operation) &&
1234 elen >= ieee80211_he_oper_size(&pos[1])) {
1235 elems->he_operation = (void *)&pos[1];
1236 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1237 elems->uora_element = (void *)&pos[1];
1238 } else if (pos[0] ==
1239 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1240 elen == 4) {
1241 elems->max_channel_switch_time = pos + 1;
1242 } else if (pos[0] ==
1243 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1244 elen == 3) {
1245 elems->mbssid_config_ie = (void *)&pos[1];
1246 } else if (pos[0] == WLAN_EID_EXT_HE_SPR &&
1247 elen >= sizeof(*elems->he_spr) &&
1248 elen >= ieee80211_he_spr_size(&pos[1])) {
1249 elems->he_spr = (void *)&pos[1];
1250 }
1251 break;
1252 default:
1253 break;
1254 }
1255
1256 if (elem_parse_failed)
1257 elems->parse_error = true;
1258 else
1259 __set_bit(id, seen_elems);
1260 }
1261
1262 if (!for_each_element_completed(elem, start, len))
1263 elems->parse_error = true;
1264
1265 return crc;
1266}
1267
1268static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1269 struct ieee802_11_elems *elems,
1270 u8 *transmitter_bssid,
1271 u8 *bss_bssid,
1272 u8 *nontransmitted_profile)
1273{
1274 const struct element *elem, *sub;
1275 size_t profile_len = 0;
1276 bool found = false;
1277
1278 if (!bss_bssid || !transmitter_bssid)
1279 return profile_len;
1280
1281 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1282 if (elem->datalen < 2)
1283 continue;
1284
1285 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1286 u8 new_bssid[ETH_ALEN];
1287 const u8 *index;
1288
1289 if (sub->id != 0 || sub->datalen < 4) {
1290 /* not a valid BSS profile */
1291 continue;
1292 }
1293
1294 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1295 sub->data[1] != 2) {
1296 /* The first element of the
1297 * Nontransmitted BSSID Profile is not
1298 * the Nontransmitted BSSID Capability
1299 * element.
1300 */
1301 continue;
1302 }
1303
1304 memset(nontransmitted_profile, 0, len);
1305 profile_len = cfg80211_merge_profile(start, len,
1306 elem,
1307 sub,
1308 nontransmitted_profile,
1309 len);
1310
1311 /* found a Nontransmitted BSSID Profile */
1312 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1313 nontransmitted_profile,
1314 profile_len);
1315 if (!index || index[1] < 1 || index[2] == 0) {
1316 /* Invalid MBSSID Index element */
1317 continue;
1318 }
1319
1320 cfg80211_gen_new_bssid(transmitter_bssid,
1321 elem->data[0],
1322 index[2],
1323 new_bssid);
1324 if (ether_addr_equal(new_bssid, bss_bssid)) {
1325 found = true;
1326 elems->bssid_index_len = index[1];
1327 elems->bssid_index = (void *)&index[2];
1328 break;
1329 }
1330 }
1331 }
1332
1333 return found ? profile_len : 0;
1334}
1335
1336u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1337 struct ieee802_11_elems *elems,
1338 u64 filter, u32 crc, u8 *transmitter_bssid,
1339 u8 *bss_bssid)
1340{
1341 const struct element *non_inherit = NULL;
1342 u8 *nontransmitted_profile;
1343 int nontransmitted_profile_len = 0;
1344
1345 memset(elems, 0, sizeof(*elems));
1346 elems->ie_start = start;
1347 elems->total_len = len;
1348
1349 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1350 if (nontransmitted_profile) {
1351 nontransmitted_profile_len =
1352 ieee802_11_find_bssid_profile(start, len, elems,
1353 transmitter_bssid,
1354 bss_bssid,
1355 nontransmitted_profile);
1356 non_inherit =
1357 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1358 nontransmitted_profile,
1359 nontransmitted_profile_len);
1360 }
1361
1362 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1363 crc, non_inherit);
1364
1365 /* Override with nontransmitted profile, if found */
1366 if (nontransmitted_profile_len)
1367 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1368 nontransmitted_profile_len,
1369 action, elems, 0, 0, NULL);
1370
1371 if (elems->tim && !elems->parse_error) {
1372 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1373
1374 elems->dtim_period = tim_ie->dtim_period;
1375 elems->dtim_count = tim_ie->dtim_count;
1376 }
1377
1378 /* Override DTIM period and count if needed */
1379 if (elems->bssid_index &&
1380 elems->bssid_index_len >=
1381 offsetofend(struct ieee80211_bssid_index, dtim_period))
1382 elems->dtim_period = elems->bssid_index->dtim_period;
1383
1384 if (elems->bssid_index &&
1385 elems->bssid_index_len >=
1386 offsetofend(struct ieee80211_bssid_index, dtim_count))
1387 elems->dtim_count = elems->bssid_index->dtim_count;
1388
1389 kfree(nontransmitted_profile);
1390
1391 return crc;
1392}
1393
1394void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1395 struct ieee80211_tx_queue_params
1396 *qparam, int ac)
1397{
1398 struct ieee80211_chanctx_conf *chanctx_conf;
1399 const struct ieee80211_reg_rule *rrule;
1400 const struct ieee80211_wmm_ac *wmm_ac;
1401 u16 center_freq = 0;
1402
1403 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1404 sdata->vif.type != NL80211_IFTYPE_STATION)
1405 return;
1406
1407 rcu_read_lock();
1408 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1409 if (chanctx_conf)
1410 center_freq = chanctx_conf->def.chan->center_freq;
1411
1412 if (!center_freq) {
1413 rcu_read_unlock();
1414 return;
1415 }
1416
1417 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1418
1419 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1420 rcu_read_unlock();
1421 return;
1422 }
1423
1424 if (sdata->vif.type == NL80211_IFTYPE_AP)
1425 wmm_ac = &rrule->wmm_rule.ap[ac];
1426 else
1427 wmm_ac = &rrule->wmm_rule.client[ac];
1428 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1429 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1430 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1431 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1432 rcu_read_unlock();
1433}
1434
1435void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1436 bool bss_notify, bool enable_qos)
1437{
1438 struct ieee80211_local *local = sdata->local;
1439 struct ieee80211_tx_queue_params qparam;
1440 struct ieee80211_chanctx_conf *chanctx_conf;
1441 int ac;
1442 bool use_11b;
1443 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1444 int aCWmin, aCWmax;
1445
1446 if (!local->ops->conf_tx)
1447 return;
1448
1449 if (local->hw.queues < IEEE80211_NUM_ACS)
1450 return;
1451
1452 memset(&qparam, 0, sizeof(qparam));
1453
1454 rcu_read_lock();
1455 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1456 use_11b = (chanctx_conf &&
1457 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1458 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1459 rcu_read_unlock();
1460
1461 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1462
1463 /* Set defaults according to 802.11-2007 Table 7-37 */
1464 aCWmax = 1023;
1465 if (use_11b)
1466 aCWmin = 31;
1467 else
1468 aCWmin = 15;
1469
1470 /* Confiure old 802.11b/g medium access rules. */
1471 qparam.cw_max = aCWmax;
1472 qparam.cw_min = aCWmin;
1473 qparam.txop = 0;
1474 qparam.aifs = 2;
1475
1476 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1477 /* Update if QoS is enabled. */
1478 if (enable_qos) {
1479 switch (ac) {
1480 case IEEE80211_AC_BK:
1481 qparam.cw_max = aCWmax;
1482 qparam.cw_min = aCWmin;
1483 qparam.txop = 0;
1484 if (is_ocb)
1485 qparam.aifs = 9;
1486 else
1487 qparam.aifs = 7;
1488 break;
1489 /* never happens but let's not leave undefined */
1490 default:
1491 case IEEE80211_AC_BE:
1492 qparam.cw_max = aCWmax;
1493 qparam.cw_min = aCWmin;
1494 qparam.txop = 0;
1495 if (is_ocb)
1496 qparam.aifs = 6;
1497 else
1498 qparam.aifs = 3;
1499 break;
1500 case IEEE80211_AC_VI:
1501 qparam.cw_max = aCWmin;
1502 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1503 if (is_ocb)
1504 qparam.txop = 0;
1505 else if (use_11b)
1506 qparam.txop = 6016/32;
1507 else
1508 qparam.txop = 3008/32;
1509
1510 if (is_ocb)
1511 qparam.aifs = 3;
1512 else
1513 qparam.aifs = 2;
1514 break;
1515 case IEEE80211_AC_VO:
1516 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1517 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1518 if (is_ocb)
1519 qparam.txop = 0;
1520 else if (use_11b)
1521 qparam.txop = 3264/32;
1522 else
1523 qparam.txop = 1504/32;
1524 qparam.aifs = 2;
1525 break;
1526 }
1527 }
1528 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1529
1530 qparam.uapsd = false;
1531
1532 sdata->tx_conf[ac] = qparam;
1533 drv_conf_tx(local, sdata, ac, &qparam);
1534 }
1535
1536 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1537 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1538 sdata->vif.type != NL80211_IFTYPE_NAN) {
1539 sdata->vif.bss_conf.qos = enable_qos;
1540 if (bss_notify)
1541 ieee80211_bss_info_change_notify(sdata,
1542 BSS_CHANGED_QOS);
1543 }
1544}
1545
1546void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1547 u16 transaction, u16 auth_alg, u16 status,
1548 const u8 *extra, size_t extra_len, const u8 *da,
1549 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1550 u32 tx_flags)
1551{
1552 struct ieee80211_local *local = sdata->local;
1553 struct sk_buff *skb;
1554 struct ieee80211_mgmt *mgmt;
1555 int err;
1556
1557 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1558 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1559 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1560 if (!skb)
1561 return;
1562
1563 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1564
1565 mgmt = skb_put_zero(skb, 24 + 6);
1566 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1567 IEEE80211_STYPE_AUTH);
1568 memcpy(mgmt->da, da, ETH_ALEN);
1569 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1570 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1571 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1572 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1573 mgmt->u.auth.status_code = cpu_to_le16(status);
1574 if (extra)
1575 skb_put_data(skb, extra, extra_len);
1576
1577 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1578 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1579 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1580 WARN_ON(err);
1581 }
1582
1583 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1584 tx_flags;
1585 ieee80211_tx_skb(sdata, skb);
1586}
1587
1588void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1589 const u8 *da, const u8 *bssid,
1590 u16 stype, u16 reason,
1591 bool send_frame, u8 *frame_buf)
1592{
1593 struct ieee80211_local *local = sdata->local;
1594 struct sk_buff *skb;
1595 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1596
1597 /* build frame */
1598 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1599 mgmt->duration = 0; /* initialize only */
1600 mgmt->seq_ctrl = 0; /* initialize only */
1601 memcpy(mgmt->da, da, ETH_ALEN);
1602 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1603 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1604 /* u.deauth.reason_code == u.disassoc.reason_code */
1605 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1606
1607 if (send_frame) {
1608 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1609 IEEE80211_DEAUTH_FRAME_LEN);
1610 if (!skb)
1611 return;
1612
1613 skb_reserve(skb, local->hw.extra_tx_headroom);
1614
1615 /* copy in frame */
1616 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1617
1618 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1619 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1620 IEEE80211_SKB_CB(skb)->flags |=
1621 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1622
1623 ieee80211_tx_skb(sdata, skb);
1624 }
1625}
1626
1627static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1628 u8 *buffer, size_t buffer_len,
1629 const u8 *ie, size_t ie_len,
1630 enum nl80211_band band,
1631 u32 rate_mask,
1632 struct cfg80211_chan_def *chandef,
1633 size_t *offset, u32 flags)
1634{
1635 struct ieee80211_supported_band *sband;
1636 const struct ieee80211_sta_he_cap *he_cap;
1637 u8 *pos = buffer, *end = buffer + buffer_len;
1638 size_t noffset;
1639 int supp_rates_len, i;
1640 u8 rates[32];
1641 int num_rates;
1642 int ext_rates_len;
1643 int shift;
1644 u32 rate_flags;
1645 bool have_80mhz = false;
1646
1647 *offset = 0;
1648
1649 sband = local->hw.wiphy->bands[band];
1650 if (WARN_ON_ONCE(!sband))
1651 return 0;
1652
1653 rate_flags = ieee80211_chandef_rate_flags(chandef);
1654 shift = ieee80211_chandef_get_shift(chandef);
1655
1656 num_rates = 0;
1657 for (i = 0; i < sband->n_bitrates; i++) {
1658 if ((BIT(i) & rate_mask) == 0)
1659 continue; /* skip rate */
1660 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1661 continue;
1662
1663 rates[num_rates++] =
1664 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1665 (1 << shift) * 5);
1666 }
1667
1668 supp_rates_len = min_t(int, num_rates, 8);
1669
1670 if (end - pos < 2 + supp_rates_len)
1671 goto out_err;
1672 *pos++ = WLAN_EID_SUPP_RATES;
1673 *pos++ = supp_rates_len;
1674 memcpy(pos, rates, supp_rates_len);
1675 pos += supp_rates_len;
1676
1677 /* insert "request information" if in custom IEs */
1678 if (ie && ie_len) {
1679 static const u8 before_extrates[] = {
1680 WLAN_EID_SSID,
1681 WLAN_EID_SUPP_RATES,
1682 WLAN_EID_REQUEST,
1683 };
1684 noffset = ieee80211_ie_split(ie, ie_len,
1685 before_extrates,
1686 ARRAY_SIZE(before_extrates),
1687 *offset);
1688 if (end - pos < noffset - *offset)
1689 goto out_err;
1690 memcpy(pos, ie + *offset, noffset - *offset);
1691 pos += noffset - *offset;
1692 *offset = noffset;
1693 }
1694
1695 ext_rates_len = num_rates - supp_rates_len;
1696 if (ext_rates_len > 0) {
1697 if (end - pos < 2 + ext_rates_len)
1698 goto out_err;
1699 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1700 *pos++ = ext_rates_len;
1701 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1702 pos += ext_rates_len;
1703 }
1704
1705 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1706 if (end - pos < 3)
1707 goto out_err;
1708 *pos++ = WLAN_EID_DS_PARAMS;
1709 *pos++ = 1;
1710 *pos++ = ieee80211_frequency_to_channel(
1711 chandef->chan->center_freq);
1712 }
1713
1714 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1715 goto done;
1716
1717 /* insert custom IEs that go before HT */
1718 if (ie && ie_len) {
1719 static const u8 before_ht[] = {
1720 /*
1721 * no need to list the ones split off already
1722 * (or generated here)
1723 */
1724 WLAN_EID_DS_PARAMS,
1725 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1726 };
1727 noffset = ieee80211_ie_split(ie, ie_len,
1728 before_ht, ARRAY_SIZE(before_ht),
1729 *offset);
1730 if (end - pos < noffset - *offset)
1731 goto out_err;
1732 memcpy(pos, ie + *offset, noffset - *offset);
1733 pos += noffset - *offset;
1734 *offset = noffset;
1735 }
1736
1737 if (sband->ht_cap.ht_supported) {
1738 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1739 goto out_err;
1740 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1741 sband->ht_cap.cap);
1742 }
1743
1744 /* insert custom IEs that go before VHT */
1745 if (ie && ie_len) {
1746 static const u8 before_vht[] = {
1747 /*
1748 * no need to list the ones split off already
1749 * (or generated here)
1750 */
1751 WLAN_EID_BSS_COEX_2040,
1752 WLAN_EID_EXT_CAPABILITY,
1753 WLAN_EID_SSID_LIST,
1754 WLAN_EID_CHANNEL_USAGE,
1755 WLAN_EID_INTERWORKING,
1756 WLAN_EID_MESH_ID,
1757 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1758 };
1759 noffset = ieee80211_ie_split(ie, ie_len,
1760 before_vht, ARRAY_SIZE(before_vht),
1761 *offset);
1762 if (end - pos < noffset - *offset)
1763 goto out_err;
1764 memcpy(pos, ie + *offset, noffset - *offset);
1765 pos += noffset - *offset;
1766 *offset = noffset;
1767 }
1768
1769 /* Check if any channel in this sband supports at least 80 MHz */
1770 for (i = 0; i < sband->n_channels; i++) {
1771 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1772 IEEE80211_CHAN_NO_80MHZ))
1773 continue;
1774
1775 have_80mhz = true;
1776 break;
1777 }
1778
1779 if (sband->vht_cap.vht_supported && have_80mhz) {
1780 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1781 goto out_err;
1782 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1783 sband->vht_cap.cap);
1784 }
1785
1786 /* insert custom IEs that go before HE */
1787 if (ie && ie_len) {
1788 static const u8 before_he[] = {
1789 /*
1790 * no need to list the ones split off before VHT
1791 * or generated here
1792 */
1793 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1794 WLAN_EID_AP_CSN,
1795 /* TODO: add 11ah/11aj/11ak elements */
1796 };
1797 noffset = ieee80211_ie_split(ie, ie_len,
1798 before_he, ARRAY_SIZE(before_he),
1799 *offset);
1800 if (end - pos < noffset - *offset)
1801 goto out_err;
1802 memcpy(pos, ie + *offset, noffset - *offset);
1803 pos += noffset - *offset;
1804 *offset = noffset;
1805 }
1806
1807 he_cap = ieee80211_get_he_sta_cap(sband);
1808 if (he_cap) {
1809 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1810 if (!pos)
1811 goto out_err;
1812 }
1813
1814 /*
1815 * If adding more here, adjust code in main.c
1816 * that calculates local->scan_ies_len.
1817 */
1818
1819 return pos - buffer;
1820 out_err:
1821 WARN_ONCE(1, "not enough space for preq IEs\n");
1822 done:
1823 return pos - buffer;
1824}
1825
1826int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1827 size_t buffer_len,
1828 struct ieee80211_scan_ies *ie_desc,
1829 const u8 *ie, size_t ie_len,
1830 u8 bands_used, u32 *rate_masks,
1831 struct cfg80211_chan_def *chandef,
1832 u32 flags)
1833{
1834 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1835 int i;
1836
1837 memset(ie_desc, 0, sizeof(*ie_desc));
1838
1839 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1840 if (bands_used & BIT(i)) {
1841 pos += ieee80211_build_preq_ies_band(local,
1842 buffer + pos,
1843 buffer_len - pos,
1844 ie, ie_len, i,
1845 rate_masks[i],
1846 chandef,
1847 &custom_ie_offset,
1848 flags);
1849 ie_desc->ies[i] = buffer + old_pos;
1850 ie_desc->len[i] = pos - old_pos;
1851 old_pos = pos;
1852 }
1853 }
1854
1855 /* add any remaining custom IEs */
1856 if (ie && ie_len) {
1857 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1858 "not enough space for preq custom IEs\n"))
1859 return pos;
1860 memcpy(buffer + pos, ie + custom_ie_offset,
1861 ie_len - custom_ie_offset);
1862 ie_desc->common_ies = buffer + pos;
1863 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1864 pos += ie_len - custom_ie_offset;
1865 }
1866
1867 return pos;
1868};
1869
1870struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1871 const u8 *src, const u8 *dst,
1872 u32 ratemask,
1873 struct ieee80211_channel *chan,
1874 const u8 *ssid, size_t ssid_len,
1875 const u8 *ie, size_t ie_len,
1876 u32 flags)
1877{
1878 struct ieee80211_local *local = sdata->local;
1879 struct cfg80211_chan_def chandef;
1880 struct sk_buff *skb;
1881 struct ieee80211_mgmt *mgmt;
1882 int ies_len;
1883 u32 rate_masks[NUM_NL80211_BANDS] = {};
1884 struct ieee80211_scan_ies dummy_ie_desc;
1885
1886 /*
1887 * Do not send DS Channel parameter for directed probe requests
1888 * in order to maximize the chance that we get a response. Some
1889 * badly-behaved APs don't respond when this parameter is included.
1890 */
1891 chandef.width = sdata->vif.bss_conf.chandef.width;
1892 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1893 chandef.chan = NULL;
1894 else
1895 chandef.chan = chan;
1896
1897 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1898 100 + ie_len);
1899 if (!skb)
1900 return NULL;
1901
1902 rate_masks[chan->band] = ratemask;
1903 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1904 skb_tailroom(skb), &dummy_ie_desc,
1905 ie, ie_len, BIT(chan->band),
1906 rate_masks, &chandef, flags);
1907 skb_put(skb, ies_len);
1908
1909 if (dst) {
1910 mgmt = (struct ieee80211_mgmt *) skb->data;
1911 memcpy(mgmt->da, dst, ETH_ALEN);
1912 memcpy(mgmt->bssid, dst, ETH_ALEN);
1913 }
1914
1915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1916
1917 return skb;
1918}
1919
1920u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1921 struct ieee802_11_elems *elems,
1922 enum nl80211_band band, u32 *basic_rates)
1923{
1924 struct ieee80211_supported_band *sband;
1925 size_t num_rates;
1926 u32 supp_rates, rate_flags;
1927 int i, j, shift;
1928
1929 sband = sdata->local->hw.wiphy->bands[band];
1930 if (WARN_ON(!sband))
1931 return 1;
1932
1933 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1934 shift = ieee80211_vif_get_shift(&sdata->vif);
1935
1936 num_rates = sband->n_bitrates;
1937 supp_rates = 0;
1938 for (i = 0; i < elems->supp_rates_len +
1939 elems->ext_supp_rates_len; i++) {
1940 u8 rate = 0;
1941 int own_rate;
1942 bool is_basic;
1943 if (i < elems->supp_rates_len)
1944 rate = elems->supp_rates[i];
1945 else if (elems->ext_supp_rates)
1946 rate = elems->ext_supp_rates
1947 [i - elems->supp_rates_len];
1948 own_rate = 5 * (rate & 0x7f);
1949 is_basic = !!(rate & 0x80);
1950
1951 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1952 continue;
1953
1954 for (j = 0; j < num_rates; j++) {
1955 int brate;
1956 if ((rate_flags & sband->bitrates[j].flags)
1957 != rate_flags)
1958 continue;
1959
1960 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1961 1 << shift);
1962
1963 if (brate == own_rate) {
1964 supp_rates |= BIT(j);
1965 if (basic_rates && is_basic)
1966 *basic_rates |= BIT(j);
1967 }
1968 }
1969 }
1970 return supp_rates;
1971}
1972
1973void ieee80211_stop_device(struct ieee80211_local *local)
1974{
1975 ieee80211_led_radio(local, false);
1976 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1977
1978 cancel_work_sync(&local->reconfig_filter);
1979
1980 flush_workqueue(local->workqueue);
1981 drv_stop(local);
1982}
1983
1984static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1985 bool aborted)
1986{
1987 /* It's possible that we don't handle the scan completion in
1988 * time during suspend, so if it's still marked as completed
1989 * here, queue the work and flush it to clean things up.
1990 * Instead of calling the worker function directly here, we
1991 * really queue it to avoid potential races with other flows
1992 * scheduling the same work.
1993 */
1994 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1995 /* If coming from reconfiguration failure, abort the scan so
1996 * we don't attempt to continue a partial HW scan - which is
1997 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1998 * completed scan, and a 5 GHz portion is still pending.
1999 */
2000 if (aborted)
2001 set_bit(SCAN_ABORTED, &local->scanning);
2002 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2003 flush_delayed_work(&local->scan_work);
2004 }
2005}
2006
2007static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2008{
2009 struct ieee80211_sub_if_data *sdata;
2010 struct ieee80211_chanctx *ctx;
2011
2012 /*
2013 * We get here if during resume the device can't be restarted properly.
2014 * We might also get here if this happens during HW reset, which is a
2015 * slightly different situation and we need to drop all connections in
2016 * the latter case.
2017 *
2018 * Ask cfg80211 to turn off all interfaces, this will result in more
2019 * warnings but at least we'll then get into a clean stopped state.
2020 */
2021
2022 local->resuming = false;
2023 local->suspended = false;
2024 local->in_reconfig = false;
2025
2026 ieee80211_flush_completed_scan(local, true);
2027
2028 /* scheduled scan clearly can't be running any more, but tell
2029 * cfg80211 and clear local state
2030 */
2031 ieee80211_sched_scan_end(local);
2032
2033 list_for_each_entry(sdata, &local->interfaces, list)
2034 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2035
2036 /* Mark channel contexts as not being in the driver any more to avoid
2037 * removing them from the driver during the shutdown process...
2038 */
2039 mutex_lock(&local->chanctx_mtx);
2040 list_for_each_entry(ctx, &local->chanctx_list, list)
2041 ctx->driver_present = false;
2042 mutex_unlock(&local->chanctx_mtx);
2043
2044 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2045}
2046
2047static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2048 struct ieee80211_sub_if_data *sdata)
2049{
2050 struct ieee80211_chanctx_conf *conf;
2051 struct ieee80211_chanctx *ctx;
2052
2053 if (!local->use_chanctx)
2054 return;
2055
2056 mutex_lock(&local->chanctx_mtx);
2057 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2058 lockdep_is_held(&local->chanctx_mtx));
2059 if (conf) {
2060 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2061 drv_assign_vif_chanctx(local, sdata, ctx);
2062 }
2063 mutex_unlock(&local->chanctx_mtx);
2064}
2065
2066static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2067{
2068 struct ieee80211_local *local = sdata->local;
2069 struct sta_info *sta;
2070
2071 /* add STAs back */
2072 mutex_lock(&local->sta_mtx);
2073 list_for_each_entry(sta, &local->sta_list, list) {
2074 enum ieee80211_sta_state state;
2075
2076 if (!sta->uploaded || sta->sdata != sdata)
2077 continue;
2078
2079 for (state = IEEE80211_STA_NOTEXIST;
2080 state < sta->sta_state; state++)
2081 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2082 state + 1));
2083 }
2084 mutex_unlock(&local->sta_mtx);
2085}
2086
2087static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2088{
2089 struct cfg80211_nan_func *func, **funcs;
2090 int res, id, i = 0;
2091
2092 res = drv_start_nan(sdata->local, sdata,
2093 &sdata->u.nan.conf);
2094 if (WARN_ON(res))
2095 return res;
2096
2097 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2098 sizeof(*funcs),
2099 GFP_KERNEL);
2100 if (!funcs)
2101 return -ENOMEM;
2102
2103 /* Add all the functions:
2104 * This is a little bit ugly. We need to call a potentially sleeping
2105 * callback for each NAN function, so we can't hold the spinlock.
2106 */
2107 spin_lock_bh(&sdata->u.nan.func_lock);
2108
2109 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2110 funcs[i++] = func;
2111
2112 spin_unlock_bh(&sdata->u.nan.func_lock);
2113
2114 for (i = 0; funcs[i]; i++) {
2115 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2116 if (WARN_ON(res))
2117 ieee80211_nan_func_terminated(&sdata->vif,
2118 funcs[i]->instance_id,
2119 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2120 GFP_KERNEL);
2121 }
2122
2123 kfree(funcs);
2124
2125 return 0;
2126}
2127
2128int ieee80211_reconfig(struct ieee80211_local *local)
2129{
2130 struct ieee80211_hw *hw = &local->hw;
2131 struct ieee80211_sub_if_data *sdata;
2132 struct ieee80211_chanctx *ctx;
2133 struct sta_info *sta;
2134 int res, i;
2135 bool reconfig_due_to_wowlan = false;
2136 struct ieee80211_sub_if_data *sched_scan_sdata;
2137 struct cfg80211_sched_scan_request *sched_scan_req;
2138 bool sched_scan_stopped = false;
2139 bool suspended = local->suspended;
2140
2141 /* nothing to do if HW shouldn't run */
2142 if (!local->open_count)
2143 goto wake_up;
2144
2145#ifdef CONFIG_PM
2146 if (suspended)
2147 local->resuming = true;
2148
2149 if (local->wowlan) {
2150 /*
2151 * In the wowlan case, both mac80211 and the device
2152 * are functional when the resume op is called, so
2153 * clear local->suspended so the device could operate
2154 * normally (e.g. pass rx frames).
2155 */
2156 local->suspended = false;
2157 res = drv_resume(local);
2158 local->wowlan = false;
2159 if (res < 0) {
2160 local->resuming = false;
2161 return res;
2162 }
2163 if (res == 0)
2164 goto wake_up;
2165 WARN_ON(res > 1);
2166 /*
2167 * res is 1, which means the driver requested
2168 * to go through a regular reset on wakeup.
2169 * restore local->suspended in this case.
2170 */
2171 reconfig_due_to_wowlan = true;
2172 local->suspended = true;
2173 }
2174#endif
2175
2176 /*
2177 * In case of hw_restart during suspend (without wowlan),
2178 * cancel restart work, as we are reconfiguring the device
2179 * anyway.
2180 * Note that restart_work is scheduled on a frozen workqueue,
2181 * so we can't deadlock in this case.
2182 */
2183 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2184 cancel_work_sync(&local->restart_work);
2185
2186 local->started = false;
2187
2188 /*
2189 * Upon resume hardware can sometimes be goofy due to
2190 * various platform / driver / bus issues, so restarting
2191 * the device may at times not work immediately. Propagate
2192 * the error.
2193 */
2194 res = drv_start(local);
2195 if (res) {
2196 if (suspended)
2197 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2198 else
2199 WARN(1, "Hardware became unavailable during restart.\n");
2200 ieee80211_handle_reconfig_failure(local);
2201 return res;
2202 }
2203
2204 /* setup fragmentation threshold */
2205 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2206
2207 /* setup RTS threshold */
2208 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2209
2210 /* reset coverage class */
2211 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2212
2213 ieee80211_led_radio(local, true);
2214 ieee80211_mod_tpt_led_trig(local,
2215 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2216
2217 /* add interfaces */
2218 sdata = rtnl_dereference(local->monitor_sdata);
2219 if (sdata) {
2220 /* in HW restart it exists already */
2221 WARN_ON(local->resuming);
2222 res = drv_add_interface(local, sdata);
2223 if (WARN_ON(res)) {
2224 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2225 synchronize_net();
2226 kfree(sdata);
2227 }
2228 }
2229
2230 list_for_each_entry(sdata, &local->interfaces, list) {
2231 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2232 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2233 ieee80211_sdata_running(sdata)) {
2234 res = drv_add_interface(local, sdata);
2235 if (WARN_ON(res))
2236 break;
2237 }
2238 }
2239
2240 /* If adding any of the interfaces failed above, roll back and
2241 * report failure.
2242 */
2243 if (res) {
2244 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2245 list)
2246 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2247 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2248 ieee80211_sdata_running(sdata))
2249 drv_remove_interface(local, sdata);
2250 ieee80211_handle_reconfig_failure(local);
2251 return res;
2252 }
2253
2254 /* add channel contexts */
2255 if (local->use_chanctx) {
2256 mutex_lock(&local->chanctx_mtx);
2257 list_for_each_entry(ctx, &local->chanctx_list, list)
2258 if (ctx->replace_state !=
2259 IEEE80211_CHANCTX_REPLACES_OTHER)
2260 WARN_ON(drv_add_chanctx(local, ctx));
2261 mutex_unlock(&local->chanctx_mtx);
2262
2263 sdata = rtnl_dereference(local->monitor_sdata);
2264 if (sdata && ieee80211_sdata_running(sdata))
2265 ieee80211_assign_chanctx(local, sdata);
2266 }
2267
2268 /* reconfigure hardware */
2269 ieee80211_hw_config(local, ~0);
2270
2271 ieee80211_configure_filter(local);
2272
2273 /* Finally also reconfigure all the BSS information */
2274 list_for_each_entry(sdata, &local->interfaces, list) {
2275 u32 changed;
2276
2277 if (!ieee80211_sdata_running(sdata))
2278 continue;
2279
2280 ieee80211_assign_chanctx(local, sdata);
2281
2282 switch (sdata->vif.type) {
2283 case NL80211_IFTYPE_AP_VLAN:
2284 case NL80211_IFTYPE_MONITOR:
2285 break;
2286 case NL80211_IFTYPE_ADHOC:
2287 if (sdata->vif.bss_conf.ibss_joined)
2288 WARN_ON(drv_join_ibss(local, sdata));
2289 /* fall through */
2290 default:
2291 ieee80211_reconfig_stations(sdata);
2292 /* fall through */
2293 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2294 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2295 drv_conf_tx(local, sdata, i,
2296 &sdata->tx_conf[i]);
2297 break;
2298 }
2299
2300 /* common change flags for all interface types */
2301 changed = BSS_CHANGED_ERP_CTS_PROT |
2302 BSS_CHANGED_ERP_PREAMBLE |
2303 BSS_CHANGED_ERP_SLOT |
2304 BSS_CHANGED_HT |
2305 BSS_CHANGED_BASIC_RATES |
2306 BSS_CHANGED_BEACON_INT |
2307 BSS_CHANGED_BSSID |
2308 BSS_CHANGED_CQM |
2309 BSS_CHANGED_QOS |
2310 BSS_CHANGED_IDLE |
2311 BSS_CHANGED_TXPOWER |
2312 BSS_CHANGED_MCAST_RATE;
2313
2314 if (sdata->vif.mu_mimo_owner)
2315 changed |= BSS_CHANGED_MU_GROUPS;
2316
2317 switch (sdata->vif.type) {
2318 case NL80211_IFTYPE_STATION:
2319 changed |= BSS_CHANGED_ASSOC |
2320 BSS_CHANGED_ARP_FILTER |
2321 BSS_CHANGED_PS;
2322
2323 /* Re-send beacon info report to the driver */
2324 if (sdata->u.mgd.have_beacon)
2325 changed |= BSS_CHANGED_BEACON_INFO;
2326
2327 if (sdata->vif.bss_conf.max_idle_period ||
2328 sdata->vif.bss_conf.protected_keep_alive)
2329 changed |= BSS_CHANGED_KEEP_ALIVE;
2330
2331 sdata_lock(sdata);
2332 ieee80211_bss_info_change_notify(sdata, changed);
2333 sdata_unlock(sdata);
2334 break;
2335 case NL80211_IFTYPE_OCB:
2336 changed |= BSS_CHANGED_OCB;
2337 ieee80211_bss_info_change_notify(sdata, changed);
2338 break;
2339 case NL80211_IFTYPE_ADHOC:
2340 changed |= BSS_CHANGED_IBSS;
2341 /* fall through */
2342 case NL80211_IFTYPE_AP:
2343 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2344
2345 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2346 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2347 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2348 changed |= BSS_CHANGED_FTM_RESPONDER;
2349
2350 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2351 changed |= BSS_CHANGED_AP_PROBE_RESP;
2352
2353 if (rcu_access_pointer(sdata->u.ap.beacon))
2354 drv_start_ap(local, sdata);
2355 }
2356
2357 /* fall through */
2358 case NL80211_IFTYPE_MESH_POINT:
2359 if (sdata->vif.bss_conf.enable_beacon) {
2360 changed |= BSS_CHANGED_BEACON |
2361 BSS_CHANGED_BEACON_ENABLED;
2362 ieee80211_bss_info_change_notify(sdata, changed);
2363 }
2364 break;
2365 case NL80211_IFTYPE_NAN:
2366 res = ieee80211_reconfig_nan(sdata);
2367 if (res < 0) {
2368 ieee80211_handle_reconfig_failure(local);
2369 return res;
2370 }
2371 break;
2372 case NL80211_IFTYPE_WDS:
2373 case NL80211_IFTYPE_AP_VLAN:
2374 case NL80211_IFTYPE_MONITOR:
2375 case NL80211_IFTYPE_P2P_DEVICE:
2376 /* nothing to do */
2377 break;
2378 case NL80211_IFTYPE_UNSPECIFIED:
2379 case NUM_NL80211_IFTYPES:
2380 case NL80211_IFTYPE_P2P_CLIENT:
2381 case NL80211_IFTYPE_P2P_GO:
2382 WARN_ON(1);
2383 break;
2384 }
2385 }
2386
2387 ieee80211_recalc_ps(local);
2388
2389 /*
2390 * The sta might be in psm against the ap (e.g. because
2391 * this was the state before a hw restart), so we
2392 * explicitly send a null packet in order to make sure
2393 * it'll sync against the ap (and get out of psm).
2394 */
2395 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2396 list_for_each_entry(sdata, &local->interfaces, list) {
2397 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2398 continue;
2399 if (!sdata->u.mgd.associated)
2400 continue;
2401
2402 ieee80211_send_nullfunc(local, sdata, false);
2403 }
2404 }
2405
2406 /* APs are now beaconing, add back stations */
2407 mutex_lock(&local->sta_mtx);
2408 list_for_each_entry(sta, &local->sta_list, list) {
2409 enum ieee80211_sta_state state;
2410
2411 if (!sta->uploaded)
2412 continue;
2413
2414 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2415 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2416 continue;
2417
2418 for (state = IEEE80211_STA_NOTEXIST;
2419 state < sta->sta_state; state++)
2420 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2421 state + 1));
2422 }
2423 mutex_unlock(&local->sta_mtx);
2424
2425 /* add back keys */
2426 list_for_each_entry(sdata, &local->interfaces, list)
2427 ieee80211_reenable_keys(sdata);
2428
2429 /* Reconfigure sched scan if it was interrupted by FW restart */
2430 mutex_lock(&local->mtx);
2431 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2432 lockdep_is_held(&local->mtx));
2433 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2434 lockdep_is_held(&local->mtx));
2435 if (sched_scan_sdata && sched_scan_req)
2436 /*
2437 * Sched scan stopped, but we don't want to report it. Instead,
2438 * we're trying to reschedule. However, if more than one scan
2439 * plan was set, we cannot reschedule since we don't know which
2440 * scan plan was currently running (and some scan plans may have
2441 * already finished).
2442 */
2443 if (sched_scan_req->n_scan_plans > 1 ||
2444 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2445 sched_scan_req)) {
2446 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2447 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2448 sched_scan_stopped = true;
2449 }
2450 mutex_unlock(&local->mtx);
2451
2452 if (sched_scan_stopped)
2453 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2454
2455 wake_up:
2456
2457 if (local->monitors == local->open_count && local->monitors > 0)
2458 ieee80211_add_virtual_monitor(local);
2459
2460 /*
2461 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2462 * sessions can be established after a resume.
2463 *
2464 * Also tear down aggregation sessions since reconfiguring
2465 * them in a hardware restart scenario is not easily done
2466 * right now, and the hardware will have lost information
2467 * about the sessions, but we and the AP still think they
2468 * are active. This is really a workaround though.
2469 */
2470 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2471 mutex_lock(&local->sta_mtx);
2472
2473 list_for_each_entry(sta, &local->sta_list, list) {
2474 if (!local->resuming)
2475 ieee80211_sta_tear_down_BA_sessions(
2476 sta, AGG_STOP_LOCAL_REQUEST);
2477 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2478 }
2479
2480 mutex_unlock(&local->sta_mtx);
2481 }
2482
2483 if (local->in_reconfig) {
2484 local->in_reconfig = false;
2485 barrier();
2486
2487 /* Restart deferred ROCs */
2488 mutex_lock(&local->mtx);
2489 ieee80211_start_next_roc(local);
2490 mutex_unlock(&local->mtx);
2491
2492 /* Requeue all works */
2493 list_for_each_entry(sdata, &local->interfaces, list)
2494 ieee80211_queue_work(&local->hw, &sdata->work);
2495 }
2496
2497 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2498 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2499 false);
2500
2501 /*
2502 * If this is for hw restart things are still running.
2503 * We may want to change that later, however.
2504 */
2505 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2506 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2507
2508 if (!suspended)
2509 return 0;
2510
2511#ifdef CONFIG_PM
2512 /* first set suspended false, then resuming */
2513 local->suspended = false;
2514 mb();
2515 local->resuming = false;
2516
2517 ieee80211_flush_completed_scan(local, false);
2518
2519 if (local->open_count && !reconfig_due_to_wowlan)
2520 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2521
2522 list_for_each_entry(sdata, &local->interfaces, list) {
2523 if (!ieee80211_sdata_running(sdata))
2524 continue;
2525 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2526 ieee80211_sta_restart(sdata);
2527 }
2528
2529 mod_timer(&local->sta_cleanup, jiffies + 1);
2530#else
2531 WARN_ON(1);
2532#endif
2533
2534 return 0;
2535}
2536
2537void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2538{
2539 struct ieee80211_sub_if_data *sdata;
2540 struct ieee80211_local *local;
2541 struct ieee80211_key *key;
2542
2543 if (WARN_ON(!vif))
2544 return;
2545
2546 sdata = vif_to_sdata(vif);
2547 local = sdata->local;
2548
2549 if (WARN_ON(!local->resuming))
2550 return;
2551
2552 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2553 return;
2554
2555 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2556
2557 mutex_lock(&local->key_mtx);
2558 list_for_each_entry(key, &sdata->key_list, list)
2559 key->flags |= KEY_FLAG_TAINTED;
2560 mutex_unlock(&local->key_mtx);
2561}
2562EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2563
2564void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2565{
2566 struct ieee80211_local *local = sdata->local;
2567 struct ieee80211_chanctx_conf *chanctx_conf;
2568 struct ieee80211_chanctx *chanctx;
2569
2570 mutex_lock(&local->chanctx_mtx);
2571
2572 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2573 lockdep_is_held(&local->chanctx_mtx));
2574
2575 /*
2576 * This function can be called from a work, thus it may be possible
2577 * that the chanctx_conf is removed (due to a disconnection, for
2578 * example).
2579 * So nothing should be done in such case.
2580 */
2581 if (!chanctx_conf)
2582 goto unlock;
2583
2584 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2585 ieee80211_recalc_smps_chanctx(local, chanctx);
2586 unlock:
2587 mutex_unlock(&local->chanctx_mtx);
2588}
2589
2590void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2591{
2592 struct ieee80211_local *local = sdata->local;
2593 struct ieee80211_chanctx_conf *chanctx_conf;
2594 struct ieee80211_chanctx *chanctx;
2595
2596 mutex_lock(&local->chanctx_mtx);
2597
2598 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2599 lockdep_is_held(&local->chanctx_mtx));
2600
2601 if (WARN_ON_ONCE(!chanctx_conf))
2602 goto unlock;
2603
2604 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2605 ieee80211_recalc_chanctx_min_def(local, chanctx);
2606 unlock:
2607 mutex_unlock(&local->chanctx_mtx);
2608}
2609
2610size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2611{
2612 size_t pos = offset;
2613
2614 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2615 pos += 2 + ies[pos + 1];
2616
2617 return pos;
2618}
2619
2620static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2621 int rssi_min_thold,
2622 int rssi_max_thold)
2623{
2624 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2625
2626 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2627 return;
2628
2629 /*
2630 * Scale up threshold values before storing it, as the RSSI averaging
2631 * algorithm uses a scaled up value as well. Change this scaling
2632 * factor if the RSSI averaging algorithm changes.
2633 */
2634 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2635 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2636}
2637
2638void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2639 int rssi_min_thold,
2640 int rssi_max_thold)
2641{
2642 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2643
2644 WARN_ON(rssi_min_thold == rssi_max_thold ||
2645 rssi_min_thold > rssi_max_thold);
2646
2647 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2648 rssi_max_thold);
2649}
2650EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2651
2652void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2653{
2654 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2655
2656 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2657}
2658EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2659
2660u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2661 u16 cap)
2662{
2663 __le16 tmp;
2664
2665 *pos++ = WLAN_EID_HT_CAPABILITY;
2666 *pos++ = sizeof(struct ieee80211_ht_cap);
2667 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2668
2669 /* capability flags */
2670 tmp = cpu_to_le16(cap);
2671 memcpy(pos, &tmp, sizeof(u16));
2672 pos += sizeof(u16);
2673
2674 /* AMPDU parameters */
2675 *pos++ = ht_cap->ampdu_factor |
2676 (ht_cap->ampdu_density <<
2677 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2678
2679 /* MCS set */
2680 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2681 pos += sizeof(ht_cap->mcs);
2682
2683 /* extended capabilities */
2684 pos += sizeof(__le16);
2685
2686 /* BF capabilities */
2687 pos += sizeof(__le32);
2688
2689 /* antenna selection */
2690 pos += sizeof(u8);
2691
2692 return pos;
2693}
2694
2695u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2696 u32 cap)
2697{
2698 __le32 tmp;
2699
2700 *pos++ = WLAN_EID_VHT_CAPABILITY;
2701 *pos++ = sizeof(struct ieee80211_vht_cap);
2702 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2703
2704 /* capability flags */
2705 tmp = cpu_to_le32(cap);
2706 memcpy(pos, &tmp, sizeof(u32));
2707 pos += sizeof(u32);
2708
2709 /* VHT MCS set */
2710 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2711 pos += sizeof(vht_cap->vht_mcs);
2712
2713 return pos;
2714}
2715
2716u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2717{
2718 const struct ieee80211_sta_he_cap *he_cap;
2719 struct ieee80211_supported_band *sband;
2720 u8 n;
2721
2722 sband = ieee80211_get_sband(sdata);
2723 if (!sband)
2724 return 0;
2725
2726 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2727 if (!he_cap)
2728 return 0;
2729
2730 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2731 return 2 + 1 +
2732 sizeof(he_cap->he_cap_elem) + n +
2733 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2734 he_cap->he_cap_elem.phy_cap_info);
2735}
2736
2737u8 *ieee80211_ie_build_he_cap(u8 *pos,
2738 const struct ieee80211_sta_he_cap *he_cap,
2739 u8 *end)
2740{
2741 u8 n;
2742 u8 ie_len;
2743 u8 *orig_pos = pos;
2744
2745 /* Make sure we have place for the IE */
2746 /*
2747 * TODO: the 1 added is because this temporarily is under the EXTENSION
2748 * IE. Get rid of it when it moves.
2749 */
2750 if (!he_cap)
2751 return orig_pos;
2752
2753 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2754 ie_len = 2 + 1 +
2755 sizeof(he_cap->he_cap_elem) + n +
2756 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2757 he_cap->he_cap_elem.phy_cap_info);
2758
2759 if ((end - pos) < ie_len)
2760 return orig_pos;
2761
2762 *pos++ = WLAN_EID_EXTENSION;
2763 pos++; /* We'll set the size later below */
2764 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2765
2766 /* Fixed data */
2767 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2768 pos += sizeof(he_cap->he_cap_elem);
2769
2770 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2771 pos += n;
2772
2773 /* Check if PPE Threshold should be present */
2774 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2775 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2776 goto end;
2777
2778 /*
2779 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2780 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2781 */
2782 n = hweight8(he_cap->ppe_thres[0] &
2783 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2784 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2785 IEEE80211_PPE_THRES_NSS_POS));
2786
2787 /*
2788 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2789 * total size.
2790 */
2791 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2792 n = DIV_ROUND_UP(n, 8);
2793
2794 /* Copy PPE Thresholds */
2795 memcpy(pos, &he_cap->ppe_thres, n);
2796 pos += n;
2797
2798end:
2799 orig_pos[1] = (pos - orig_pos) - 2;
2800 return pos;
2801}
2802
2803u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2804 const struct cfg80211_chan_def *chandef,
2805 u16 prot_mode, bool rifs_mode)
2806{
2807 struct ieee80211_ht_operation *ht_oper;
2808 /* Build HT Information */
2809 *pos++ = WLAN_EID_HT_OPERATION;
2810 *pos++ = sizeof(struct ieee80211_ht_operation);
2811 ht_oper = (struct ieee80211_ht_operation *)pos;
2812 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2813 chandef->chan->center_freq);
2814 switch (chandef->width) {
2815 case NL80211_CHAN_WIDTH_160:
2816 case NL80211_CHAN_WIDTH_80P80:
2817 case NL80211_CHAN_WIDTH_80:
2818 case NL80211_CHAN_WIDTH_40:
2819 if (chandef->center_freq1 > chandef->chan->center_freq)
2820 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2821 else
2822 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2823 break;
2824 default:
2825 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2826 break;
2827 }
2828 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2829 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2830 chandef->width != NL80211_CHAN_WIDTH_20)
2831 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2832
2833 if (rifs_mode)
2834 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2835
2836 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2837 ht_oper->stbc_param = 0x0000;
2838
2839 /* It seems that Basic MCS set and Supported MCS set
2840 are identical for the first 10 bytes */
2841 memset(&ht_oper->basic_set, 0, 16);
2842 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2843
2844 return pos + sizeof(struct ieee80211_ht_operation);
2845}
2846
2847void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2848 const struct cfg80211_chan_def *chandef)
2849{
2850 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2851 *pos++ = 3; /* IE length */
2852 /* New channel width */
2853 switch (chandef->width) {
2854 case NL80211_CHAN_WIDTH_80:
2855 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2856 break;
2857 case NL80211_CHAN_WIDTH_160:
2858 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2859 break;
2860 case NL80211_CHAN_WIDTH_80P80:
2861 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2862 break;
2863 default:
2864 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2865 }
2866
2867 /* new center frequency segment 0 */
2868 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2869 /* new center frequency segment 1 */
2870 if (chandef->center_freq2)
2871 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2872 else
2873 *pos++ = 0;
2874}
2875
2876u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2877 const struct cfg80211_chan_def *chandef)
2878{
2879 struct ieee80211_vht_operation *vht_oper;
2880
2881 *pos++ = WLAN_EID_VHT_OPERATION;
2882 *pos++ = sizeof(struct ieee80211_vht_operation);
2883 vht_oper = (struct ieee80211_vht_operation *)pos;
2884 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2885 chandef->center_freq1);
2886 if (chandef->center_freq2)
2887 vht_oper->center_freq_seg1_idx =
2888 ieee80211_frequency_to_channel(chandef->center_freq2);
2889 else
2890 vht_oper->center_freq_seg1_idx = 0x00;
2891
2892 switch (chandef->width) {
2893 case NL80211_CHAN_WIDTH_160:
2894 /*
2895 * Convert 160 MHz channel width to new style as interop
2896 * workaround.
2897 */
2898 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2899 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2900 if (chandef->chan->center_freq < chandef->center_freq1)
2901 vht_oper->center_freq_seg0_idx -= 8;
2902 else
2903 vht_oper->center_freq_seg0_idx += 8;
2904 break;
2905 case NL80211_CHAN_WIDTH_80P80:
2906 /*
2907 * Convert 80+80 MHz channel width to new style as interop
2908 * workaround.
2909 */
2910 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2911 break;
2912 case NL80211_CHAN_WIDTH_80:
2913 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2914 break;
2915 default:
2916 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2917 break;
2918 }
2919
2920 /* don't require special VHT peer rates */
2921 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2922
2923 return pos + sizeof(struct ieee80211_vht_operation);
2924}
2925
2926u8 *ieee80211_ie_build_he_oper(u8 *pos)
2927{
2928 struct ieee80211_he_operation *he_oper;
2929 u32 he_oper_params;
2930
2931 *pos++ = WLAN_EID_EXTENSION;
2932 *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2933 *pos++ = WLAN_EID_EXT_HE_OPERATION;
2934
2935 he_oper_params = 0;
2936 he_oper_params |= u32_encode_bits(1023, /* disabled */
2937 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2938 he_oper_params |= u32_encode_bits(1,
2939 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2940 he_oper_params |= u32_encode_bits(1,
2941 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2942
2943 he_oper = (struct ieee80211_he_operation *)pos;
2944 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2945
2946 /* don't require special HE peer rates */
2947 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2948
2949 /* TODO add VHT operational and 6GHz operational subelement? */
2950
2951 return pos + sizeof(struct ieee80211_vht_operation);
2952}
2953
2954bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2955 struct cfg80211_chan_def *chandef)
2956{
2957 enum nl80211_channel_type channel_type;
2958
2959 if (!ht_oper)
2960 return false;
2961
2962 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2963 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2964 channel_type = NL80211_CHAN_HT20;
2965 break;
2966 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2967 channel_type = NL80211_CHAN_HT40PLUS;
2968 break;
2969 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2970 channel_type = NL80211_CHAN_HT40MINUS;
2971 break;
2972 default:
2973 channel_type = NL80211_CHAN_NO_HT;
2974 return false;
2975 }
2976
2977 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2978 return true;
2979}
2980
2981bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2982 const struct ieee80211_vht_operation *oper,
2983 const struct ieee80211_ht_operation *htop,
2984 struct cfg80211_chan_def *chandef)
2985{
2986 struct cfg80211_chan_def new = *chandef;
2987 int cf0, cf1;
2988 int ccfs0, ccfs1, ccfs2;
2989 int ccf0, ccf1;
2990
2991 if (!oper || !htop)
2992 return false;
2993
2994 ccfs0 = oper->center_freq_seg0_idx;
2995 ccfs1 = oper->center_freq_seg1_idx;
2996 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2997 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2998 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2999
3000 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3001 ccf0 = ccfs0;
3002 ccf1 = ccfs1;
3003 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3004 ccf1 = ccfs2;
3005
3006 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3007 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3008
3009 switch (oper->chan_width) {
3010 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3011 /* just use HT information directly */
3012 break;
3013 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3014 new.width = NL80211_CHAN_WIDTH_80;
3015 new.center_freq1 = cf0;
3016 /* If needed, adjust based on the newer interop workaround. */
3017 if (ccf1) {
3018 unsigned int diff;
3019
3020 diff = abs(ccf1 - ccf0);
3021 if (diff == 8) {
3022 new.width = NL80211_CHAN_WIDTH_160;
3023 new.center_freq1 = cf1;
3024 } else if (diff > 8) {
3025 new.width = NL80211_CHAN_WIDTH_80P80;
3026 new.center_freq2 = cf1;
3027 }
3028 }
3029 break;
3030 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3031 /* deprecated encoding */
3032 new.width = NL80211_CHAN_WIDTH_160;
3033 new.center_freq1 = cf0;
3034 break;
3035 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3036 /* deprecated encoding */
3037 new.width = NL80211_CHAN_WIDTH_80P80;
3038 new.center_freq1 = cf0;
3039 new.center_freq2 = cf1;
3040 break;
3041 default:
3042 return false;
3043 }
3044
3045 if (!cfg80211_chandef_valid(&new))
3046 return false;
3047
3048 *chandef = new;
3049 return true;
3050}
3051
3052int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3053 const struct ieee80211_supported_band *sband,
3054 const u8 *srates, int srates_len, u32 *rates)
3055{
3056 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3057 int shift = ieee80211_chandef_get_shift(chandef);
3058 struct ieee80211_rate *br;
3059 int brate, rate, i, j, count = 0;
3060
3061 *rates = 0;
3062
3063 for (i = 0; i < srates_len; i++) {
3064 rate = srates[i] & 0x7f;
3065
3066 for (j = 0; j < sband->n_bitrates; j++) {
3067 br = &sband->bitrates[j];
3068 if ((rate_flags & br->flags) != rate_flags)
3069 continue;
3070
3071 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3072 if (brate == rate) {
3073 *rates |= BIT(j);
3074 count++;
3075 break;
3076 }
3077 }
3078 }
3079 return count;
3080}
3081
3082int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3083 struct sk_buff *skb, bool need_basic,
3084 enum nl80211_band band)
3085{
3086 struct ieee80211_local *local = sdata->local;
3087 struct ieee80211_supported_band *sband;
3088 int rate, shift;
3089 u8 i, rates, *pos;
3090 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3091 u32 rate_flags;
3092
3093 shift = ieee80211_vif_get_shift(&sdata->vif);
3094 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3095 sband = local->hw.wiphy->bands[band];
3096 rates = 0;
3097 for (i = 0; i < sband->n_bitrates; i++) {
3098 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3099 continue;
3100 rates++;
3101 }
3102 if (rates > 8)
3103 rates = 8;
3104
3105 if (skb_tailroom(skb) < rates + 2)
3106 return -ENOMEM;
3107
3108 pos = skb_put(skb, rates + 2);
3109 *pos++ = WLAN_EID_SUPP_RATES;
3110 *pos++ = rates;
3111 for (i = 0; i < rates; i++) {
3112 u8 basic = 0;
3113 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3114 continue;
3115
3116 if (need_basic && basic_rates & BIT(i))
3117 basic = 0x80;
3118 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3119 5 * (1 << shift));
3120 *pos++ = basic | (u8) rate;
3121 }
3122
3123 return 0;
3124}
3125
3126int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3127 struct sk_buff *skb, bool need_basic,
3128 enum nl80211_band band)
3129{
3130 struct ieee80211_local *local = sdata->local;
3131 struct ieee80211_supported_band *sband;
3132 int rate, shift;
3133 u8 i, exrates, *pos;
3134 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3135 u32 rate_flags;
3136
3137 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3138 shift = ieee80211_vif_get_shift(&sdata->vif);
3139
3140 sband = local->hw.wiphy->bands[band];
3141 exrates = 0;
3142 for (i = 0; i < sband->n_bitrates; i++) {
3143 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3144 continue;
3145 exrates++;
3146 }
3147
3148 if (exrates > 8)
3149 exrates -= 8;
3150 else
3151 exrates = 0;
3152
3153 if (skb_tailroom(skb) < exrates + 2)
3154 return -ENOMEM;
3155
3156 if (exrates) {
3157 pos = skb_put(skb, exrates + 2);
3158 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3159 *pos++ = exrates;
3160 for (i = 8; i < sband->n_bitrates; i++) {
3161 u8 basic = 0;
3162 if ((rate_flags & sband->bitrates[i].flags)
3163 != rate_flags)
3164 continue;
3165 if (need_basic && basic_rates & BIT(i))
3166 basic = 0x80;
3167 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3168 5 * (1 << shift));
3169 *pos++ = basic | (u8) rate;
3170 }
3171 }
3172 return 0;
3173}
3174
3175int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3176{
3177 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3178 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3179
3180 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3181 /* non-managed type inferfaces */
3182 return 0;
3183 }
3184 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3185}
3186EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3187
3188u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3189{
3190 if (!mcs)
3191 return 1;
3192
3193 /* TODO: consider rx_highest */
3194
3195 if (mcs->rx_mask[3])
3196 return 4;
3197 if (mcs->rx_mask[2])
3198 return 3;
3199 if (mcs->rx_mask[1])
3200 return 2;
3201 return 1;
3202}
3203
3204/**
3205 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3206 * @local: mac80211 hw info struct
3207 * @status: RX status
3208 * @mpdu_len: total MPDU length (including FCS)
3209 * @mpdu_offset: offset into MPDU to calculate timestamp at
3210 *
3211 * This function calculates the RX timestamp at the given MPDU offset, taking
3212 * into account what the RX timestamp was. An offset of 0 will just normalize
3213 * the timestamp to TSF at beginning of MPDU reception.
3214 */
3215u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3216 struct ieee80211_rx_status *status,
3217 unsigned int mpdu_len,
3218 unsigned int mpdu_offset)
3219{
3220 u64 ts = status->mactime;
3221 struct rate_info ri;
3222 u16 rate;
3223
3224 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3225 return 0;
3226
3227 memset(&ri, 0, sizeof(ri));
3228
3229 ri.bw = status->bw;
3230
3231 /* Fill cfg80211 rate info */
3232 switch (status->encoding) {
3233 case RX_ENC_HT:
3234 ri.mcs = status->rate_idx;
3235 ri.flags |= RATE_INFO_FLAGS_MCS;
3236 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3237 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3238 break;
3239 case RX_ENC_VHT:
3240 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3241 ri.mcs = status->rate_idx;
3242 ri.nss = status->nss;
3243 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3244 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3245 break;
3246 default:
3247 WARN_ON(1);
3248 /* fall through */
3249 case RX_ENC_LEGACY: {
3250 struct ieee80211_supported_band *sband;
3251 int shift = 0;
3252 int bitrate;
3253
3254 switch (status->bw) {
3255 case RATE_INFO_BW_10:
3256 shift = 1;
3257 break;
3258 case RATE_INFO_BW_5:
3259 shift = 2;
3260 break;
3261 }
3262
3263 sband = local->hw.wiphy->bands[status->band];
3264 bitrate = sband->bitrates[status->rate_idx].bitrate;
3265 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3266
3267 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3268 /* TODO: handle HT/VHT preambles */
3269 if (status->band == NL80211_BAND_5GHZ) {
3270 ts += 20 << shift;
3271 mpdu_offset += 2;
3272 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3273 ts += 96;
3274 } else {
3275 ts += 192;
3276 }
3277 }
3278 break;
3279 }
3280 }
3281
3282 rate = cfg80211_calculate_bitrate(&ri);
3283 if (WARN_ONCE(!rate,
3284 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3285 (unsigned long long)status->flag, status->rate_idx,
3286 status->nss))
3287 return 0;
3288
3289 /* rewind from end of MPDU */
3290 if (status->flag & RX_FLAG_MACTIME_END)
3291 ts -= mpdu_len * 8 * 10 / rate;
3292
3293 ts += mpdu_offset * 8 * 10 / rate;
3294
3295 return ts;
3296}
3297
3298void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3299{
3300 struct ieee80211_sub_if_data *sdata;
3301 struct cfg80211_chan_def chandef;
3302
3303 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3304 ASSERT_RTNL();
3305
3306 mutex_lock(&local->mtx);
3307 list_for_each_entry(sdata, &local->interfaces, list) {
3308 /* it might be waiting for the local->mtx, but then
3309 * by the time it gets it, sdata->wdev.cac_started
3310 * will no longer be true
3311 */
3312 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3313
3314 if (sdata->wdev.cac_started) {
3315 chandef = sdata->vif.bss_conf.chandef;
3316 ieee80211_vif_release_channel(sdata);
3317 cfg80211_cac_event(sdata->dev,
3318 &chandef,
3319 NL80211_RADAR_CAC_ABORTED,
3320 GFP_KERNEL);
3321 }
3322 }
3323 mutex_unlock(&local->mtx);
3324}
3325
3326void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3327{
3328 struct ieee80211_local *local =
3329 container_of(work, struct ieee80211_local, radar_detected_work);
3330 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3331 struct ieee80211_chanctx *ctx;
3332 int num_chanctx = 0;
3333
3334 mutex_lock(&local->chanctx_mtx);
3335 list_for_each_entry(ctx, &local->chanctx_list, list) {
3336 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3337 continue;
3338
3339 num_chanctx++;
3340 chandef = ctx->conf.def;
3341 }
3342 mutex_unlock(&local->chanctx_mtx);
3343
3344 rtnl_lock();
3345 ieee80211_dfs_cac_cancel(local);
3346 rtnl_unlock();
3347
3348 if (num_chanctx > 1)
3349 /* XXX: multi-channel is not supported yet */
3350 WARN_ON(1);
3351 else
3352 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3353}
3354
3355void ieee80211_radar_detected(struct ieee80211_hw *hw)
3356{
3357 struct ieee80211_local *local = hw_to_local(hw);
3358
3359 trace_api_radar_detected(local);
3360
3361 schedule_work(&local->radar_detected_work);
3362}
3363EXPORT_SYMBOL(ieee80211_radar_detected);
3364
3365u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3366{
3367 u32 ret;
3368 int tmp;
3369
3370 switch (c->width) {
3371 case NL80211_CHAN_WIDTH_20:
3372 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3373 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3374 break;
3375 case NL80211_CHAN_WIDTH_40:
3376 c->width = NL80211_CHAN_WIDTH_20;
3377 c->center_freq1 = c->chan->center_freq;
3378 ret = IEEE80211_STA_DISABLE_40MHZ |
3379 IEEE80211_STA_DISABLE_VHT;
3380 break;
3381 case NL80211_CHAN_WIDTH_80:
3382 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3383 /* n_P40 */
3384 tmp /= 2;
3385 /* freq_P40 */
3386 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3387 c->width = NL80211_CHAN_WIDTH_40;
3388 ret = IEEE80211_STA_DISABLE_VHT;
3389 break;
3390 case NL80211_CHAN_WIDTH_80P80:
3391 c->center_freq2 = 0;
3392 c->width = NL80211_CHAN_WIDTH_80;
3393 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3394 IEEE80211_STA_DISABLE_160MHZ;
3395 break;
3396 case NL80211_CHAN_WIDTH_160:
3397 /* n_P20 */
3398 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3399 /* n_P80 */
3400 tmp /= 4;
3401 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3402 c->width = NL80211_CHAN_WIDTH_80;
3403 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3404 IEEE80211_STA_DISABLE_160MHZ;
3405 break;
3406 default:
3407 case NL80211_CHAN_WIDTH_20_NOHT:
3408 WARN_ON_ONCE(1);
3409 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3410 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3411 break;
3412 case NL80211_CHAN_WIDTH_5:
3413 case NL80211_CHAN_WIDTH_10:
3414 WARN_ON_ONCE(1);
3415 /* keep c->width */
3416 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3417 break;
3418 }
3419
3420 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3421
3422 return ret;
3423}
3424
3425/*
3426 * Returns true if smps_mode_new is strictly more restrictive than
3427 * smps_mode_old.
3428 */
3429bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3430 enum ieee80211_smps_mode smps_mode_new)
3431{
3432 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3433 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3434 return false;
3435
3436 switch (smps_mode_old) {
3437 case IEEE80211_SMPS_STATIC:
3438 return false;
3439 case IEEE80211_SMPS_DYNAMIC:
3440 return smps_mode_new == IEEE80211_SMPS_STATIC;
3441 case IEEE80211_SMPS_OFF:
3442 return smps_mode_new != IEEE80211_SMPS_OFF;
3443 default:
3444 WARN_ON(1);
3445 }
3446
3447 return false;
3448}
3449
3450int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3451 struct cfg80211_csa_settings *csa_settings)
3452{
3453 struct sk_buff *skb;
3454 struct ieee80211_mgmt *mgmt;
3455 struct ieee80211_local *local = sdata->local;
3456 int freq;
3457 int hdr_len = offsetofend(struct ieee80211_mgmt,
3458 u.action.u.chan_switch);
3459 u8 *pos;
3460
3461 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3462 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3463 return -EOPNOTSUPP;
3464
3465 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3466 5 + /* channel switch announcement element */
3467 3 + /* secondary channel offset element */
3468 5 + /* wide bandwidth channel switch announcement */
3469 8); /* mesh channel switch parameters element */
3470 if (!skb)
3471 return -ENOMEM;
3472
3473 skb_reserve(skb, local->tx_headroom);
3474 mgmt = skb_put_zero(skb, hdr_len);
3475 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3476 IEEE80211_STYPE_ACTION);
3477
3478 eth_broadcast_addr(mgmt->da);
3479 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3480 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3481 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3482 } else {
3483 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3484 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3485 }
3486 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3487 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3488 pos = skb_put(skb, 5);
3489 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3490 *pos++ = 3; /* IE length */
3491 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3492 freq = csa_settings->chandef.chan->center_freq;
3493 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3494 *pos++ = csa_settings->count; /* count */
3495
3496 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3497 enum nl80211_channel_type ch_type;
3498
3499 skb_put(skb, 3);
3500 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3501 *pos++ = 1; /* IE length */
3502 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3503 if (ch_type == NL80211_CHAN_HT40PLUS)
3504 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3505 else
3506 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3507 }
3508
3509 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3510 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3511
3512 skb_put(skb, 8);
3513 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3514 *pos++ = 6; /* IE length */
3515 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3516 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3517 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3518 *pos++ |= csa_settings->block_tx ?
3519 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3520 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3521 pos += 2;
3522 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3523 pos += 2;
3524 }
3525
3526 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3527 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3528 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3529 skb_put(skb, 5);
3530 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3531 }
3532
3533 ieee80211_tx_skb(sdata, skb);
3534 return 0;
3535}
3536
3537bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3538{
3539 return !(cs == NULL || cs->cipher == 0 ||
3540 cs->hdr_len < cs->pn_len + cs->pn_off ||
3541 cs->hdr_len <= cs->key_idx_off ||
3542 cs->key_idx_shift > 7 ||
3543 cs->key_idx_mask == 0);
3544}
3545
3546bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3547{
3548 int i;
3549
3550 /* Ensure we have enough iftype bitmap space for all iftype values */
3551 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3552
3553 for (i = 0; i < n; i++)
3554 if (!ieee80211_cs_valid(&cs[i]))
3555 return false;
3556
3557 return true;
3558}
3559
3560const struct ieee80211_cipher_scheme *
3561ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3562 enum nl80211_iftype iftype)
3563{
3564 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3565 int n = local->hw.n_cipher_schemes;
3566 int i;
3567 const struct ieee80211_cipher_scheme *cs = NULL;
3568
3569 for (i = 0; i < n; i++) {
3570 if (l[i].cipher == cipher) {
3571 cs = &l[i];
3572 break;
3573 }
3574 }
3575
3576 if (!cs || !(cs->iftype & BIT(iftype)))
3577 return NULL;
3578
3579 return cs;
3580}
3581
3582int ieee80211_cs_headroom(struct ieee80211_local *local,
3583 struct cfg80211_crypto_settings *crypto,
3584 enum nl80211_iftype iftype)
3585{
3586 const struct ieee80211_cipher_scheme *cs;
3587 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3588 int i;
3589
3590 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3591 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3592 iftype);
3593
3594 if (cs && headroom < cs->hdr_len)
3595 headroom = cs->hdr_len;
3596 }
3597
3598 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3599 if (cs && headroom < cs->hdr_len)
3600 headroom = cs->hdr_len;
3601
3602 return headroom;
3603}
3604
3605static bool
3606ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3607{
3608 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3609 int skip;
3610
3611 if (end > 0)
3612 return false;
3613
3614 /* One shot NOA */
3615 if (data->count[i] == 1)
3616 return false;
3617
3618 if (data->desc[i].interval == 0)
3619 return false;
3620
3621 /* End time is in the past, check for repetitions */
3622 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3623 if (data->count[i] < 255) {
3624 if (data->count[i] <= skip) {
3625 data->count[i] = 0;
3626 return false;
3627 }
3628
3629 data->count[i] -= skip;
3630 }
3631
3632 data->desc[i].start += skip * data->desc[i].interval;
3633
3634 return true;
3635}
3636
3637static bool
3638ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3639 s32 *offset)
3640{
3641 bool ret = false;
3642 int i;
3643
3644 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3645 s32 cur;
3646
3647 if (!data->count[i])
3648 continue;
3649
3650 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3651 ret = true;
3652
3653 cur = data->desc[i].start - tsf;
3654 if (cur > *offset)
3655 continue;
3656
3657 cur = data->desc[i].start + data->desc[i].duration - tsf;
3658 if (cur > *offset)
3659 *offset = cur;
3660 }
3661
3662 return ret;
3663}
3664
3665static u32
3666ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3667{
3668 s32 offset = 0;
3669 int tries = 0;
3670 /*
3671 * arbitrary limit, used to avoid infinite loops when combined NoA
3672 * descriptors cover the full time period.
3673 */
3674 int max_tries = 5;
3675
3676 ieee80211_extend_absent_time(data, tsf, &offset);
3677 do {
3678 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3679 break;
3680
3681 tries++;
3682 } while (tries < max_tries);
3683
3684 return offset;
3685}
3686
3687void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3688{
3689 u32 next_offset = BIT(31) - 1;
3690 int i;
3691
3692 data->absent = 0;
3693 data->has_next_tsf = false;
3694 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3695 s32 start;
3696
3697 if (!data->count[i])
3698 continue;
3699
3700 ieee80211_extend_noa_desc(data, tsf, i);
3701 start = data->desc[i].start - tsf;
3702 if (start <= 0)
3703 data->absent |= BIT(i);
3704
3705 if (next_offset > start)
3706 next_offset = start;
3707
3708 data->has_next_tsf = true;
3709 }
3710
3711 if (data->absent)
3712 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3713
3714 data->next_tsf = tsf + next_offset;
3715}
3716EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3717
3718int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3719 struct ieee80211_noa_data *data, u32 tsf)
3720{
3721 int ret = 0;
3722 int i;
3723
3724 memset(data, 0, sizeof(*data));
3725
3726 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3727 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3728
3729 if (!desc->count || !desc->duration)
3730 continue;
3731
3732 data->count[i] = desc->count;
3733 data->desc[i].start = le32_to_cpu(desc->start_time);
3734 data->desc[i].duration = le32_to_cpu(desc->duration);
3735 data->desc[i].interval = le32_to_cpu(desc->interval);
3736
3737 if (data->count[i] > 1 &&
3738 data->desc[i].interval < data->desc[i].duration)
3739 continue;
3740
3741 ieee80211_extend_noa_desc(data, tsf, i);
3742 ret++;
3743 }
3744
3745 if (ret)
3746 ieee80211_update_p2p_noa(data, tsf);
3747
3748 return ret;
3749}
3750EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3751
3752void ieee80211_recalc_dtim(struct ieee80211_local *local,
3753 struct ieee80211_sub_if_data *sdata)
3754{
3755 u64 tsf = drv_get_tsf(local, sdata);
3756 u64 dtim_count = 0;
3757 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3758 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3759 struct ps_data *ps;
3760 u8 bcns_from_dtim;
3761
3762 if (tsf == -1ULL || !beacon_int || !dtim_period)
3763 return;
3764
3765 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3766 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3767 if (!sdata->bss)
3768 return;
3769
3770 ps = &sdata->bss->ps;
3771 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3772 ps = &sdata->u.mesh.ps;
3773 } else {
3774 return;
3775 }
3776
3777 /*
3778 * actually finds last dtim_count, mac80211 will update in
3779 * __beacon_add_tim().
3780 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3781 */
3782 do_div(tsf, beacon_int);
3783 bcns_from_dtim = do_div(tsf, dtim_period);
3784 /* just had a DTIM */
3785 if (!bcns_from_dtim)
3786 dtim_count = 0;
3787 else
3788 dtim_count = dtim_period - bcns_from_dtim;
3789
3790 ps->dtim_count = dtim_count;
3791}
3792
3793static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3794 struct ieee80211_chanctx *ctx)
3795{
3796 struct ieee80211_sub_if_data *sdata;
3797 u8 radar_detect = 0;
3798
3799 lockdep_assert_held(&local->chanctx_mtx);
3800
3801 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3802 return 0;
3803
3804 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3805 if (sdata->reserved_radar_required)
3806 radar_detect |= BIT(sdata->reserved_chandef.width);
3807
3808 /*
3809 * An in-place reservation context should not have any assigned vifs
3810 * until it replaces the other context.
3811 */
3812 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3813 !list_empty(&ctx->assigned_vifs));
3814
3815 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3816 if (sdata->radar_required)
3817 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3818
3819 return radar_detect;
3820}
3821
3822int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3823 const struct cfg80211_chan_def *chandef,
3824 enum ieee80211_chanctx_mode chanmode,
3825 u8 radar_detect)
3826{
3827 struct ieee80211_local *local = sdata->local;
3828 struct ieee80211_sub_if_data *sdata_iter;
3829 enum nl80211_iftype iftype = sdata->wdev.iftype;
3830 struct ieee80211_chanctx *ctx;
3831 int total = 1;
3832 struct iface_combination_params params = {
3833 .radar_detect = radar_detect,
3834 };
3835
3836 lockdep_assert_held(&local->chanctx_mtx);
3837
3838 if (WARN_ON(hweight32(radar_detect) > 1))
3839 return -EINVAL;
3840
3841 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3842 !chandef->chan))
3843 return -EINVAL;
3844
3845 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3846 return -EINVAL;
3847
3848 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3849 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3850 /*
3851 * always passing this is harmless, since it'll be the
3852 * same value that cfg80211 finds if it finds the same
3853 * interface ... and that's always allowed
3854 */
3855 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3856 }
3857
3858 /* Always allow software iftypes */
3859 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3860 if (radar_detect)
3861 return -EINVAL;
3862 return 0;
3863 }
3864
3865 if (chandef)
3866 params.num_different_channels = 1;
3867
3868 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3869 params.iftype_num[iftype] = 1;
3870
3871 list_for_each_entry(ctx, &local->chanctx_list, list) {
3872 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3873 continue;
3874 params.radar_detect |=
3875 ieee80211_chanctx_radar_detect(local, ctx);
3876 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3877 params.num_different_channels++;
3878 continue;
3879 }
3880 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3881 cfg80211_chandef_compatible(chandef,
3882 &ctx->conf.def))
3883 continue;
3884 params.num_different_channels++;
3885 }
3886
3887 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3888 struct wireless_dev *wdev_iter;
3889
3890 wdev_iter = &sdata_iter->wdev;
3891
3892 if (sdata_iter == sdata ||
3893 !ieee80211_sdata_running(sdata_iter) ||
3894 cfg80211_iftype_allowed(local->hw.wiphy,
3895 wdev_iter->iftype, 0, 1))
3896 continue;
3897
3898 params.iftype_num[wdev_iter->iftype]++;
3899 total++;
3900 }
3901
3902 if (total == 1 && !params.radar_detect)
3903 return 0;
3904
3905 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3906}
3907
3908static void
3909ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3910 void *data)
3911{
3912 u32 *max_num_different_channels = data;
3913
3914 *max_num_different_channels = max(*max_num_different_channels,
3915 c->num_different_channels);
3916}
3917
3918int ieee80211_max_num_channels(struct ieee80211_local *local)
3919{
3920 struct ieee80211_sub_if_data *sdata;
3921 struct ieee80211_chanctx *ctx;
3922 u32 max_num_different_channels = 1;
3923 int err;
3924 struct iface_combination_params params = {0};
3925
3926 lockdep_assert_held(&local->chanctx_mtx);
3927
3928 list_for_each_entry(ctx, &local->chanctx_list, list) {
3929 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3930 continue;
3931
3932 params.num_different_channels++;
3933
3934 params.radar_detect |=
3935 ieee80211_chanctx_radar_detect(local, ctx);
3936 }
3937
3938 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3939 params.iftype_num[sdata->wdev.iftype]++;
3940
3941 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3942 ieee80211_iter_max_chans,
3943 &max_num_different_channels);
3944 if (err < 0)
3945 return err;
3946
3947 return max_num_different_channels;
3948}
3949
3950u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3951{
3952 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3953 *buf++ = 7; /* len */
3954 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3955 *buf++ = 0x50;
3956 *buf++ = 0xf2;
3957 *buf++ = 2; /* WME */
3958 *buf++ = 0; /* WME info */
3959 *buf++ = 1; /* WME ver */
3960 *buf++ = qosinfo; /* U-APSD no in use */
3961
3962 return buf;
3963}
3964
3965void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3966 unsigned long *frame_cnt,
3967 unsigned long *byte_cnt)
3968{
3969 struct txq_info *txqi = to_txq_info(txq);
3970 u32 frag_cnt = 0, frag_bytes = 0;
3971 struct sk_buff *skb;
3972
3973 skb_queue_walk(&txqi->frags, skb) {
3974 frag_cnt++;
3975 frag_bytes += skb->len;
3976 }
3977
3978 if (frame_cnt)
3979 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3980
3981 if (byte_cnt)
3982 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3983}
3984EXPORT_SYMBOL(ieee80211_txq_get_depth);
3985
3986const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3987 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3988 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3989 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3990 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3991};