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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 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2016 Intel Deutschland GmbH
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * utilities for mac80211
14 */
15
16#include <net/mac80211.h>
17#include <linux/netdevice.h>
18#include <linux/export.h>
19#include <linux/types.h>
20#include <linux/slab.h>
21#include <linux/skbuff.h>
22#include <linux/etherdevice.h>
23#include <linux/if_arp.h>
24#include <linux/bitmap.h>
25#include <linux/crc32.h>
26#include <net/net_namespace.h>
27#include <net/cfg80211.h>
28#include <net/rtnetlink.h>
29
30#include "ieee80211_i.h"
31#include "driver-ops.h"
32#include "rate.h"
33#include "mesh.h"
34#include "wme.h"
35#include "led.h"
36#include "wep.h"
37
38/* privid for wiphys to determine whether they belong to us or not */
39const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40
41struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42{
43 struct ieee80211_local *local;
44 BUG_ON(!wiphy);
45
46 local = wiphy_priv(wiphy);
47 return &local->hw;
48}
49EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50
51void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
52{
53 struct sk_buff *skb;
54 struct ieee80211_hdr *hdr;
55
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
59 }
60}
61
62int ieee80211_frame_duration(enum nl80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
64 int shift)
65{
66 int dur;
67
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
71 * also include SIFS.
72 *
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
75 *
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
78 */
79
80 if (band == NL80211_BAND_5GHZ || erp) {
81 /*
82 * OFDM:
83 *
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
88 *
89 * T_SYM = 4 usec
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
92 * signal ext = 6 usec
93 */
94 dur = 16; /* SIFS + signal ext */
95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
97
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
99 * * times 4 for 5 MHz
100 * * times 2 for 10 MHz
101 */
102 dur *= 1 << shift;
103
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
106 */
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate); /* T_SYM x N_SYM */
109 } else {
110 /*
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
114 *
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
119 */
120 dur = 10; /* aSIFSTime = 10 usec */
121 dur += short_preamble ? (72 + 24) : (144 + 48);
122
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
124 }
125
126 return dur;
127}
128
129/* Exported duration function for driver use */
130__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum nl80211_band band,
133 size_t frame_len,
134 struct ieee80211_rate *rate)
135{
136 struct ieee80211_sub_if_data *sdata;
137 u16 dur;
138 int erp, shift = 0;
139 bool short_preamble = false;
140
141 erp = 0;
142 if (vif) {
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
148 }
149
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
152
153 return cpu_to_le16(dur);
154}
155EXPORT_SYMBOL(ieee80211_generic_frame_duration);
156
157__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
160{
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
164 bool short_preamble;
165 int erp, shift = 0, bitrate;
166 u16 dur;
167 struct ieee80211_supported_band *sband;
168
169 sband = local->hw.wiphy->bands[frame_txctl->band];
170
171 short_preamble = false;
172
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
174
175 erp = 0;
176 if (vif) {
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
182 }
183
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
185
186 /* CTS duration */
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189 /* Data frame duration */
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
192 /* ACK duration */
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
195
196 return cpu_to_le16(dur);
197}
198EXPORT_SYMBOL(ieee80211_rts_duration);
199
200__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
202 size_t frame_len,
203 const struct ieee80211_tx_info *frame_txctl)
204{
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
208 bool short_preamble;
209 int erp, shift = 0, bitrate;
210 u16 dur;
211 struct ieee80211_supported_band *sband;
212
213 sband = local->hw.wiphy->bands[frame_txctl->band];
214
215 short_preamble = false;
216
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
218 erp = 0;
219 if (vif) {
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
225 }
226
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
228
229 /* Data frame duration */
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
233 /* ACK duration */
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 }
237
238 return cpu_to_le16(dur);
239}
240EXPORT_SYMBOL(ieee80211_ctstoself_duration);
241
242void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
243{
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
246
247 if (local->ops->wake_tx_queue)
248 return;
249
250 if (local->hw.queues < IEEE80211_NUM_ACS)
251 n_acs = 1;
252
253 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
254 int ac;
255
256 if (!sdata->dev)
257 continue;
258
259 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
260 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
261 continue;
262
263 for (ac = 0; ac < n_acs; ac++) {
264 int ac_queue = sdata->vif.hw_queue[ac];
265
266 if (ac_queue == queue ||
267 (sdata->vif.cab_queue == queue &&
268 local->queue_stop_reasons[ac_queue] == 0 &&
269 skb_queue_empty(&local->pending[ac_queue])))
270 netif_wake_subqueue(sdata->dev, ac);
271 }
272 }
273}
274
275static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
276 enum queue_stop_reason reason,
277 bool refcounted)
278{
279 struct ieee80211_local *local = hw_to_local(hw);
280
281 trace_wake_queue(local, queue, reason);
282
283 if (WARN_ON(queue >= hw->queues))
284 return;
285
286 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
287 return;
288
289 if (!refcounted) {
290 local->q_stop_reasons[queue][reason] = 0;
291 } else {
292 local->q_stop_reasons[queue][reason]--;
293 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
294 local->q_stop_reasons[queue][reason] = 0;
295 }
296
297 if (local->q_stop_reasons[queue][reason] == 0)
298 __clear_bit(reason, &local->queue_stop_reasons[queue]);
299
300 if (local->queue_stop_reasons[queue] != 0)
301 /* someone still has this queue stopped */
302 return;
303
304 if (skb_queue_empty(&local->pending[queue])) {
305 rcu_read_lock();
306 ieee80211_propagate_queue_wake(local, queue);
307 rcu_read_unlock();
308 } else
309 tasklet_schedule(&local->tx_pending_tasklet);
310}
311
312void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
313 enum queue_stop_reason reason,
314 bool refcounted)
315{
316 struct ieee80211_local *local = hw_to_local(hw);
317 unsigned long flags;
318
319 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
320 __ieee80211_wake_queue(hw, queue, reason, refcounted);
321 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
322}
323
324void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
325{
326 ieee80211_wake_queue_by_reason(hw, queue,
327 IEEE80211_QUEUE_STOP_REASON_DRIVER,
328 false);
329}
330EXPORT_SYMBOL(ieee80211_wake_queue);
331
332static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
333 enum queue_stop_reason reason,
334 bool refcounted)
335{
336 struct ieee80211_local *local = hw_to_local(hw);
337 struct ieee80211_sub_if_data *sdata;
338 int n_acs = IEEE80211_NUM_ACS;
339
340 trace_stop_queue(local, queue, reason);
341
342 if (WARN_ON(queue >= hw->queues))
343 return;
344
345 if (!refcounted)
346 local->q_stop_reasons[queue][reason] = 1;
347 else
348 local->q_stop_reasons[queue][reason]++;
349
350 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
351 return;
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 rcu_read_lock();
360 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
361 int ac;
362
363 if (!sdata->dev)
364 continue;
365
366 for (ac = 0; ac < n_acs; ac++) {
367 if (sdata->vif.hw_queue[ac] == queue ||
368 sdata->vif.cab_queue == queue)
369 netif_stop_subqueue(sdata->dev, ac);
370 }
371 }
372 rcu_read_unlock();
373}
374
375void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
376 enum queue_stop_reason reason,
377 bool refcounted)
378{
379 struct ieee80211_local *local = hw_to_local(hw);
380 unsigned long flags;
381
382 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
383 __ieee80211_stop_queue(hw, queue, reason, refcounted);
384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
385}
386
387void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
388{
389 ieee80211_stop_queue_by_reason(hw, queue,
390 IEEE80211_QUEUE_STOP_REASON_DRIVER,
391 false);
392}
393EXPORT_SYMBOL(ieee80211_stop_queue);
394
395void ieee80211_add_pending_skb(struct ieee80211_local *local,
396 struct sk_buff *skb)
397{
398 struct ieee80211_hw *hw = &local->hw;
399 unsigned long flags;
400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
401 int queue = info->hw_queue;
402
403 if (WARN_ON(!info->control.vif)) {
404 ieee80211_free_txskb(&local->hw, skb);
405 return;
406 }
407
408 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
409 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
410 false);
411 __skb_queue_tail(&local->pending[queue], skb);
412 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
413 false);
414 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
415}
416
417void ieee80211_add_pending_skbs(struct ieee80211_local *local,
418 struct sk_buff_head *skbs)
419{
420 struct ieee80211_hw *hw = &local->hw;
421 struct sk_buff *skb;
422 unsigned long flags;
423 int queue, i;
424
425 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
426 while ((skb = skb_dequeue(skbs))) {
427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
428
429 if (WARN_ON(!info->control.vif)) {
430 ieee80211_free_txskb(&local->hw, skb);
431 continue;
432 }
433
434 queue = info->hw_queue;
435
436 __ieee80211_stop_queue(hw, queue,
437 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
438 false);
439
440 __skb_queue_tail(&local->pending[queue], skb);
441 }
442
443 for (i = 0; i < hw->queues; i++)
444 __ieee80211_wake_queue(hw, i,
445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
446 false);
447 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
448}
449
450void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
451 unsigned long queues,
452 enum queue_stop_reason reason,
453 bool refcounted)
454{
455 struct ieee80211_local *local = hw_to_local(hw);
456 unsigned long flags;
457 int i;
458
459 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
460
461 for_each_set_bit(i, &queues, hw->queues)
462 __ieee80211_stop_queue(hw, i, reason, refcounted);
463
464 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
465}
466
467void ieee80211_stop_queues(struct ieee80211_hw *hw)
468{
469 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
470 IEEE80211_QUEUE_STOP_REASON_DRIVER,
471 false);
472}
473EXPORT_SYMBOL(ieee80211_stop_queues);
474
475int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
476{
477 struct ieee80211_local *local = hw_to_local(hw);
478 unsigned long flags;
479 int ret;
480
481 if (WARN_ON(queue >= hw->queues))
482 return true;
483
484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
485 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
486 &local->queue_stop_reasons[queue]);
487 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
488 return ret;
489}
490EXPORT_SYMBOL(ieee80211_queue_stopped);
491
492void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
493 unsigned long queues,
494 enum queue_stop_reason reason,
495 bool refcounted)
496{
497 struct ieee80211_local *local = hw_to_local(hw);
498 unsigned long flags;
499 int i;
500
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502
503 for_each_set_bit(i, &queues, hw->queues)
504 __ieee80211_wake_queue(hw, i, reason, refcounted);
505
506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
507}
508
509void ieee80211_wake_queues(struct ieee80211_hw *hw)
510{
511 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
512 IEEE80211_QUEUE_STOP_REASON_DRIVER,
513 false);
514}
515EXPORT_SYMBOL(ieee80211_wake_queues);
516
517static unsigned int
518ieee80211_get_vif_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
520{
521 unsigned int queues;
522
523 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
524 int ac;
525
526 queues = 0;
527
528 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
529 queues |= BIT(sdata->vif.hw_queue[ac]);
530 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
531 queues |= BIT(sdata->vif.cab_queue);
532 } else {
533 /* all queues */
534 queues = BIT(local->hw.queues) - 1;
535 }
536
537 return queues;
538}
539
540void __ieee80211_flush_queues(struct ieee80211_local *local,
541 struct ieee80211_sub_if_data *sdata,
542 unsigned int queues, bool drop)
543{
544 if (!local->ops->flush)
545 return;
546
547 /*
548 * If no queue was set, or if the HW doesn't support
549 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
550 */
551 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
552 queues = ieee80211_get_vif_queues(local, sdata);
553
554 ieee80211_stop_queues_by_reason(&local->hw, queues,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH,
556 false);
557
558 drv_flush(local, sdata, queues, drop);
559
560 ieee80211_wake_queues_by_reason(&local->hw, queues,
561 IEEE80211_QUEUE_STOP_REASON_FLUSH,
562 false);
563}
564
565void ieee80211_flush_queues(struct ieee80211_local *local,
566 struct ieee80211_sub_if_data *sdata, bool drop)
567{
568 __ieee80211_flush_queues(local, sdata, 0, drop);
569}
570
571void ieee80211_stop_vif_queues(struct ieee80211_local *local,
572 struct ieee80211_sub_if_data *sdata,
573 enum queue_stop_reason reason)
574{
575 ieee80211_stop_queues_by_reason(&local->hw,
576 ieee80211_get_vif_queues(local, sdata),
577 reason, true);
578}
579
580void ieee80211_wake_vif_queues(struct ieee80211_local *local,
581 struct ieee80211_sub_if_data *sdata,
582 enum queue_stop_reason reason)
583{
584 ieee80211_wake_queues_by_reason(&local->hw,
585 ieee80211_get_vif_queues(local, sdata),
586 reason, true);
587}
588
589static void __iterate_interfaces(struct ieee80211_local *local,
590 u32 iter_flags,
591 void (*iterator)(void *data, u8 *mac,
592 struct ieee80211_vif *vif),
593 void *data)
594{
595 struct ieee80211_sub_if_data *sdata;
596 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
597
598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
599 switch (sdata->vif.type) {
600 case NL80211_IFTYPE_MONITOR:
601 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
602 continue;
603 break;
604 case NL80211_IFTYPE_AP_VLAN:
605 continue;
606 default:
607 break;
608 }
609 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
610 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
611 continue;
612 if (ieee80211_sdata_running(sdata) || !active_only)
613 iterator(data, sdata->vif.addr,
614 &sdata->vif);
615 }
616
617 sdata = rcu_dereference_check(local->monitor_sdata,
618 lockdep_is_held(&local->iflist_mtx) ||
619 lockdep_rtnl_is_held());
620 if (sdata &&
621 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
622 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
623 iterator(data, sdata->vif.addr, &sdata->vif);
624}
625
626void ieee80211_iterate_interfaces(
627 struct ieee80211_hw *hw, u32 iter_flags,
628 void (*iterator)(void *data, u8 *mac,
629 struct ieee80211_vif *vif),
630 void *data)
631{
632 struct ieee80211_local *local = hw_to_local(hw);
633
634 mutex_lock(&local->iflist_mtx);
635 __iterate_interfaces(local, iter_flags, iterator, data);
636 mutex_unlock(&local->iflist_mtx);
637}
638EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
639
640void ieee80211_iterate_active_interfaces_atomic(
641 struct ieee80211_hw *hw, u32 iter_flags,
642 void (*iterator)(void *data, u8 *mac,
643 struct ieee80211_vif *vif),
644 void *data)
645{
646 struct ieee80211_local *local = hw_to_local(hw);
647
648 rcu_read_lock();
649 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
650 iterator, data);
651 rcu_read_unlock();
652}
653EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
654
655void ieee80211_iterate_active_interfaces_rtnl(
656 struct ieee80211_hw *hw, u32 iter_flags,
657 void (*iterator)(void *data, u8 *mac,
658 struct ieee80211_vif *vif),
659 void *data)
660{
661 struct ieee80211_local *local = hw_to_local(hw);
662
663 ASSERT_RTNL();
664
665 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
666 iterator, data);
667}
668EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
669
670static void __iterate_stations(struct ieee80211_local *local,
671 void (*iterator)(void *data,
672 struct ieee80211_sta *sta),
673 void *data)
674{
675 struct sta_info *sta;
676
677 list_for_each_entry_rcu(sta, &local->sta_list, list) {
678 if (!sta->uploaded)
679 continue;
680
681 iterator(data, &sta->sta);
682 }
683}
684
685void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
686 void (*iterator)(void *data,
687 struct ieee80211_sta *sta),
688 void *data)
689{
690 struct ieee80211_local *local = hw_to_local(hw);
691
692 rcu_read_lock();
693 __iterate_stations(local, iterator, data);
694 rcu_read_unlock();
695}
696EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
697
698struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
699{
700 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
701
702 if (!ieee80211_sdata_running(sdata) ||
703 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
704 return NULL;
705 return &sdata->vif;
706}
707EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
708
709struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
710{
711 struct ieee80211_sub_if_data *sdata;
712
713 if (!vif)
714 return NULL;
715
716 sdata = vif_to_sdata(vif);
717
718 if (!ieee80211_sdata_running(sdata) ||
719 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
720 return NULL;
721
722 return &sdata->wdev;
723}
724EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
725
726/*
727 * Nothing should have been stuffed into the workqueue during
728 * the suspend->resume cycle. Since we can't check each caller
729 * of this function if we are already quiescing / suspended,
730 * check here and don't WARN since this can actually happen when
731 * the rx path (for example) is racing against __ieee80211_suspend
732 * and suspending / quiescing was set after the rx path checked
733 * them.
734 */
735static bool ieee80211_can_queue_work(struct ieee80211_local *local)
736{
737 if (local->quiescing || (local->suspended && !local->resuming)) {
738 pr_warn("queueing ieee80211 work while going to suspend\n");
739 return false;
740 }
741
742 return true;
743}
744
745void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
746{
747 struct ieee80211_local *local = hw_to_local(hw);
748
749 if (!ieee80211_can_queue_work(local))
750 return;
751
752 queue_work(local->workqueue, work);
753}
754EXPORT_SYMBOL(ieee80211_queue_work);
755
756void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
757 struct delayed_work *dwork,
758 unsigned long delay)
759{
760 struct ieee80211_local *local = hw_to_local(hw);
761
762 if (!ieee80211_can_queue_work(local))
763 return;
764
765 queue_delayed_work(local->workqueue, dwork, delay);
766}
767EXPORT_SYMBOL(ieee80211_queue_delayed_work);
768
769u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
770 struct ieee802_11_elems *elems,
771 u64 filter, u32 crc)
772{
773 size_t left = len;
774 const u8 *pos = start;
775 bool calc_crc = filter != 0;
776 DECLARE_BITMAP(seen_elems, 256);
777 const u8 *ie;
778
779 bitmap_zero(seen_elems, 256);
780 memset(elems, 0, sizeof(*elems));
781 elems->ie_start = start;
782 elems->total_len = len;
783
784 while (left >= 2) {
785 u8 id, elen;
786 bool elem_parse_failed;
787
788 id = *pos++;
789 elen = *pos++;
790 left -= 2;
791
792 if (elen > left) {
793 elems->parse_error = true;
794 break;
795 }
796
797 switch (id) {
798 case WLAN_EID_SSID:
799 case WLAN_EID_SUPP_RATES:
800 case WLAN_EID_FH_PARAMS:
801 case WLAN_EID_DS_PARAMS:
802 case WLAN_EID_CF_PARAMS:
803 case WLAN_EID_TIM:
804 case WLAN_EID_IBSS_PARAMS:
805 case WLAN_EID_CHALLENGE:
806 case WLAN_EID_RSN:
807 case WLAN_EID_ERP_INFO:
808 case WLAN_EID_EXT_SUPP_RATES:
809 case WLAN_EID_HT_CAPABILITY:
810 case WLAN_EID_HT_OPERATION:
811 case WLAN_EID_VHT_CAPABILITY:
812 case WLAN_EID_VHT_OPERATION:
813 case WLAN_EID_MESH_ID:
814 case WLAN_EID_MESH_CONFIG:
815 case WLAN_EID_PEER_MGMT:
816 case WLAN_EID_PREQ:
817 case WLAN_EID_PREP:
818 case WLAN_EID_PERR:
819 case WLAN_EID_RANN:
820 case WLAN_EID_CHANNEL_SWITCH:
821 case WLAN_EID_EXT_CHANSWITCH_ANN:
822 case WLAN_EID_COUNTRY:
823 case WLAN_EID_PWR_CONSTRAINT:
824 case WLAN_EID_TIMEOUT_INTERVAL:
825 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
826 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
827 case WLAN_EID_CHAN_SWITCH_PARAM:
828 case WLAN_EID_EXT_CAPABILITY:
829 case WLAN_EID_CHAN_SWITCH_TIMING:
830 case WLAN_EID_LINK_ID:
831 /*
832 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
833 * that if the content gets bigger it might be needed more than once
834 */
835 if (test_bit(id, seen_elems)) {
836 elems->parse_error = true;
837 left -= elen;
838 pos += elen;
839 continue;
840 }
841 break;
842 }
843
844 if (calc_crc && id < 64 && (filter & (1ULL << id)))
845 crc = crc32_be(crc, pos - 2, elen + 2);
846
847 elem_parse_failed = false;
848
849 switch (id) {
850 case WLAN_EID_LINK_ID:
851 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
852 elem_parse_failed = true;
853 break;
854 }
855 elems->lnk_id = (void *)(pos - 2);
856 break;
857 case WLAN_EID_CHAN_SWITCH_TIMING:
858 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
859 elem_parse_failed = true;
860 break;
861 }
862 elems->ch_sw_timing = (void *)pos;
863 break;
864 case WLAN_EID_EXT_CAPABILITY:
865 elems->ext_capab = pos;
866 elems->ext_capab_len = elen;
867 break;
868 case WLAN_EID_SSID:
869 elems->ssid = pos;
870 elems->ssid_len = elen;
871 break;
872 case WLAN_EID_SUPP_RATES:
873 elems->supp_rates = pos;
874 elems->supp_rates_len = elen;
875 break;
876 case WLAN_EID_DS_PARAMS:
877 if (elen >= 1)
878 elems->ds_params = pos;
879 else
880 elem_parse_failed = true;
881 break;
882 case WLAN_EID_TIM:
883 if (elen >= sizeof(struct ieee80211_tim_ie)) {
884 elems->tim = (void *)pos;
885 elems->tim_len = elen;
886 } else
887 elem_parse_failed = true;
888 break;
889 case WLAN_EID_CHALLENGE:
890 elems->challenge = pos;
891 elems->challenge_len = elen;
892 break;
893 case WLAN_EID_VENDOR_SPECIFIC:
894 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
895 pos[2] == 0xf2) {
896 /* Microsoft OUI (00:50:F2) */
897
898 if (calc_crc)
899 crc = crc32_be(crc, pos - 2, elen + 2);
900
901 if (elen >= 5 && pos[3] == 2) {
902 /* OUI Type 2 - WMM IE */
903 if (pos[4] == 0) {
904 elems->wmm_info = pos;
905 elems->wmm_info_len = elen;
906 } else if (pos[4] == 1) {
907 elems->wmm_param = pos;
908 elems->wmm_param_len = elen;
909 }
910 }
911 }
912 break;
913 case WLAN_EID_RSN:
914 elems->rsn = pos;
915 elems->rsn_len = elen;
916 break;
917 case WLAN_EID_ERP_INFO:
918 if (elen >= 1)
919 elems->erp_info = pos;
920 else
921 elem_parse_failed = true;
922 break;
923 case WLAN_EID_EXT_SUPP_RATES:
924 elems->ext_supp_rates = pos;
925 elems->ext_supp_rates_len = elen;
926 break;
927 case WLAN_EID_HT_CAPABILITY:
928 if (elen >= sizeof(struct ieee80211_ht_cap))
929 elems->ht_cap_elem = (void *)pos;
930 else
931 elem_parse_failed = true;
932 break;
933 case WLAN_EID_HT_OPERATION:
934 if (elen >= sizeof(struct ieee80211_ht_operation))
935 elems->ht_operation = (void *)pos;
936 else
937 elem_parse_failed = true;
938 break;
939 case WLAN_EID_VHT_CAPABILITY:
940 if (elen >= sizeof(struct ieee80211_vht_cap))
941 elems->vht_cap_elem = (void *)pos;
942 else
943 elem_parse_failed = true;
944 break;
945 case WLAN_EID_VHT_OPERATION:
946 if (elen >= sizeof(struct ieee80211_vht_operation))
947 elems->vht_operation = (void *)pos;
948 else
949 elem_parse_failed = true;
950 break;
951 case WLAN_EID_OPMODE_NOTIF:
952 if (elen > 0)
953 elems->opmode_notif = pos;
954 else
955 elem_parse_failed = true;
956 break;
957 case WLAN_EID_MESH_ID:
958 elems->mesh_id = pos;
959 elems->mesh_id_len = elen;
960 break;
961 case WLAN_EID_MESH_CONFIG:
962 if (elen >= sizeof(struct ieee80211_meshconf_ie))
963 elems->mesh_config = (void *)pos;
964 else
965 elem_parse_failed = true;
966 break;
967 case WLAN_EID_PEER_MGMT:
968 elems->peering = pos;
969 elems->peering_len = elen;
970 break;
971 case WLAN_EID_MESH_AWAKE_WINDOW:
972 if (elen >= 2)
973 elems->awake_window = (void *)pos;
974 break;
975 case WLAN_EID_PREQ:
976 elems->preq = pos;
977 elems->preq_len = elen;
978 break;
979 case WLAN_EID_PREP:
980 elems->prep = pos;
981 elems->prep_len = elen;
982 break;
983 case WLAN_EID_PERR:
984 elems->perr = pos;
985 elems->perr_len = elen;
986 break;
987 case WLAN_EID_RANN:
988 if (elen >= sizeof(struct ieee80211_rann_ie))
989 elems->rann = (void *)pos;
990 else
991 elem_parse_failed = true;
992 break;
993 case WLAN_EID_CHANNEL_SWITCH:
994 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
995 elem_parse_failed = true;
996 break;
997 }
998 elems->ch_switch_ie = (void *)pos;
999 break;
1000 case WLAN_EID_EXT_CHANSWITCH_ANN:
1001 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1002 elem_parse_failed = true;
1003 break;
1004 }
1005 elems->ext_chansw_ie = (void *)pos;
1006 break;
1007 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1008 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1009 elem_parse_failed = true;
1010 break;
1011 }
1012 elems->sec_chan_offs = (void *)pos;
1013 break;
1014 case WLAN_EID_CHAN_SWITCH_PARAM:
1015 if (elen !=
1016 sizeof(*elems->mesh_chansw_params_ie)) {
1017 elem_parse_failed = true;
1018 break;
1019 }
1020 elems->mesh_chansw_params_ie = (void *)pos;
1021 break;
1022 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1023 if (!action ||
1024 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1025 elem_parse_failed = true;
1026 break;
1027 }
1028 elems->wide_bw_chansw_ie = (void *)pos;
1029 break;
1030 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1031 if (action) {
1032 elem_parse_failed = true;
1033 break;
1034 }
1035 /*
1036 * This is a bit tricky, but as we only care about
1037 * the wide bandwidth channel switch element, so
1038 * just parse it out manually.
1039 */
1040 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1041 pos, elen);
1042 if (ie) {
1043 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1044 elems->wide_bw_chansw_ie =
1045 (void *)(ie + 2);
1046 else
1047 elem_parse_failed = true;
1048 }
1049 break;
1050 case WLAN_EID_COUNTRY:
1051 elems->country_elem = pos;
1052 elems->country_elem_len = elen;
1053 break;
1054 case WLAN_EID_PWR_CONSTRAINT:
1055 if (elen != 1) {
1056 elem_parse_failed = true;
1057 break;
1058 }
1059 elems->pwr_constr_elem = pos;
1060 break;
1061 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1062 /* Lots of different options exist, but we only care
1063 * about the Dynamic Transmit Power Control element.
1064 * First check for the Cisco OUI, then for the DTPC
1065 * tag (0x00).
1066 */
1067 if (elen < 4) {
1068 elem_parse_failed = true;
1069 break;
1070 }
1071
1072 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1073 pos[2] != 0x96 || pos[3] != 0x00)
1074 break;
1075
1076 if (elen != 6) {
1077 elem_parse_failed = true;
1078 break;
1079 }
1080
1081 if (calc_crc)
1082 crc = crc32_be(crc, pos - 2, elen + 2);
1083
1084 elems->cisco_dtpc_elem = pos;
1085 break;
1086 case WLAN_EID_TIMEOUT_INTERVAL:
1087 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1088 elems->timeout_int = (void *)pos;
1089 else
1090 elem_parse_failed = true;
1091 break;
1092 default:
1093 break;
1094 }
1095
1096 if (elem_parse_failed)
1097 elems->parse_error = true;
1098 else
1099 __set_bit(id, seen_elems);
1100
1101 left -= elen;
1102 pos += elen;
1103 }
1104
1105 if (left != 0)
1106 elems->parse_error = true;
1107
1108 return crc;
1109}
1110
1111void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1112 bool bss_notify, bool enable_qos)
1113{
1114 struct ieee80211_local *local = sdata->local;
1115 struct ieee80211_tx_queue_params qparam;
1116 struct ieee80211_chanctx_conf *chanctx_conf;
1117 int ac;
1118 bool use_11b;
1119 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1120 int aCWmin, aCWmax;
1121
1122 if (!local->ops->conf_tx)
1123 return;
1124
1125 if (local->hw.queues < IEEE80211_NUM_ACS)
1126 return;
1127
1128 memset(&qparam, 0, sizeof(qparam));
1129
1130 rcu_read_lock();
1131 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1132 use_11b = (chanctx_conf &&
1133 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1134 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1135 rcu_read_unlock();
1136
1137 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1138
1139 /* Set defaults according to 802.11-2007 Table 7-37 */
1140 aCWmax = 1023;
1141 if (use_11b)
1142 aCWmin = 31;
1143 else
1144 aCWmin = 15;
1145
1146 /* Confiure old 802.11b/g medium access rules. */
1147 qparam.cw_max = aCWmax;
1148 qparam.cw_min = aCWmin;
1149 qparam.txop = 0;
1150 qparam.aifs = 2;
1151
1152 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1153 /* Update if QoS is enabled. */
1154 if (enable_qos) {
1155 switch (ac) {
1156 case IEEE80211_AC_BK:
1157 qparam.cw_max = aCWmax;
1158 qparam.cw_min = aCWmin;
1159 qparam.txop = 0;
1160 if (is_ocb)
1161 qparam.aifs = 9;
1162 else
1163 qparam.aifs = 7;
1164 break;
1165 /* never happens but let's not leave undefined */
1166 default:
1167 case IEEE80211_AC_BE:
1168 qparam.cw_max = aCWmax;
1169 qparam.cw_min = aCWmin;
1170 qparam.txop = 0;
1171 if (is_ocb)
1172 qparam.aifs = 6;
1173 else
1174 qparam.aifs = 3;
1175 break;
1176 case IEEE80211_AC_VI:
1177 qparam.cw_max = aCWmin;
1178 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1179 if (is_ocb)
1180 qparam.txop = 0;
1181 else if (use_11b)
1182 qparam.txop = 6016/32;
1183 else
1184 qparam.txop = 3008/32;
1185
1186 if (is_ocb)
1187 qparam.aifs = 3;
1188 else
1189 qparam.aifs = 2;
1190 break;
1191 case IEEE80211_AC_VO:
1192 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1193 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1194 if (is_ocb)
1195 qparam.txop = 0;
1196 else if (use_11b)
1197 qparam.txop = 3264/32;
1198 else
1199 qparam.txop = 1504/32;
1200 qparam.aifs = 2;
1201 break;
1202 }
1203 }
1204
1205 qparam.uapsd = false;
1206
1207 sdata->tx_conf[ac] = qparam;
1208 drv_conf_tx(local, sdata, ac, &qparam);
1209 }
1210
1211 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1212 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1213 sdata->vif.type != NL80211_IFTYPE_NAN) {
1214 sdata->vif.bss_conf.qos = enable_qos;
1215 if (bss_notify)
1216 ieee80211_bss_info_change_notify(sdata,
1217 BSS_CHANGED_QOS);
1218 }
1219}
1220
1221void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1222 u16 transaction, u16 auth_alg, u16 status,
1223 const u8 *extra, size_t extra_len, const u8 *da,
1224 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1225 u32 tx_flags)
1226{
1227 struct ieee80211_local *local = sdata->local;
1228 struct sk_buff *skb;
1229 struct ieee80211_mgmt *mgmt;
1230 int err;
1231
1232 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1233 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1234 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1235 if (!skb)
1236 return;
1237
1238 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1239
1240 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1241 memset(mgmt, 0, 24 + 6);
1242 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1243 IEEE80211_STYPE_AUTH);
1244 memcpy(mgmt->da, da, ETH_ALEN);
1245 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1246 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1247 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1248 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1249 mgmt->u.auth.status_code = cpu_to_le16(status);
1250 if (extra)
1251 memcpy(skb_put(skb, extra_len), extra, extra_len);
1252
1253 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1254 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1255 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1256 WARN_ON(err);
1257 }
1258
1259 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1260 tx_flags;
1261 ieee80211_tx_skb(sdata, skb);
1262}
1263
1264void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1265 const u8 *bssid, u16 stype, u16 reason,
1266 bool send_frame, u8 *frame_buf)
1267{
1268 struct ieee80211_local *local = sdata->local;
1269 struct sk_buff *skb;
1270 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1271
1272 /* build frame */
1273 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1274 mgmt->duration = 0; /* initialize only */
1275 mgmt->seq_ctrl = 0; /* initialize only */
1276 memcpy(mgmt->da, bssid, ETH_ALEN);
1277 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1278 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1279 /* u.deauth.reason_code == u.disassoc.reason_code */
1280 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1281
1282 if (send_frame) {
1283 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1284 IEEE80211_DEAUTH_FRAME_LEN);
1285 if (!skb)
1286 return;
1287
1288 skb_reserve(skb, local->hw.extra_tx_headroom);
1289
1290 /* copy in frame */
1291 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1292 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1293
1294 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1295 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1296 IEEE80211_SKB_CB(skb)->flags |=
1297 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1298
1299 ieee80211_tx_skb(sdata, skb);
1300 }
1301}
1302
1303static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1304 u8 *buffer, size_t buffer_len,
1305 const u8 *ie, size_t ie_len,
1306 enum nl80211_band band,
1307 u32 rate_mask,
1308 struct cfg80211_chan_def *chandef,
1309 size_t *offset)
1310{
1311 struct ieee80211_supported_band *sband;
1312 u8 *pos = buffer, *end = buffer + buffer_len;
1313 size_t noffset;
1314 int supp_rates_len, i;
1315 u8 rates[32];
1316 int num_rates;
1317 int ext_rates_len;
1318 int shift;
1319 u32 rate_flags;
1320 bool have_80mhz = false;
1321
1322 *offset = 0;
1323
1324 sband = local->hw.wiphy->bands[band];
1325 if (WARN_ON_ONCE(!sband))
1326 return 0;
1327
1328 rate_flags = ieee80211_chandef_rate_flags(chandef);
1329 shift = ieee80211_chandef_get_shift(chandef);
1330
1331 num_rates = 0;
1332 for (i = 0; i < sband->n_bitrates; i++) {
1333 if ((BIT(i) & rate_mask) == 0)
1334 continue; /* skip rate */
1335 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1336 continue;
1337
1338 rates[num_rates++] =
1339 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1340 (1 << shift) * 5);
1341 }
1342
1343 supp_rates_len = min_t(int, num_rates, 8);
1344
1345 if (end - pos < 2 + supp_rates_len)
1346 goto out_err;
1347 *pos++ = WLAN_EID_SUPP_RATES;
1348 *pos++ = supp_rates_len;
1349 memcpy(pos, rates, supp_rates_len);
1350 pos += supp_rates_len;
1351
1352 /* insert "request information" if in custom IEs */
1353 if (ie && ie_len) {
1354 static const u8 before_extrates[] = {
1355 WLAN_EID_SSID,
1356 WLAN_EID_SUPP_RATES,
1357 WLAN_EID_REQUEST,
1358 };
1359 noffset = ieee80211_ie_split(ie, ie_len,
1360 before_extrates,
1361 ARRAY_SIZE(before_extrates),
1362 *offset);
1363 if (end - pos < noffset - *offset)
1364 goto out_err;
1365 memcpy(pos, ie + *offset, noffset - *offset);
1366 pos += noffset - *offset;
1367 *offset = noffset;
1368 }
1369
1370 ext_rates_len = num_rates - supp_rates_len;
1371 if (ext_rates_len > 0) {
1372 if (end - pos < 2 + ext_rates_len)
1373 goto out_err;
1374 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1375 *pos++ = ext_rates_len;
1376 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1377 pos += ext_rates_len;
1378 }
1379
1380 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1381 if (end - pos < 3)
1382 goto out_err;
1383 *pos++ = WLAN_EID_DS_PARAMS;
1384 *pos++ = 1;
1385 *pos++ = ieee80211_frequency_to_channel(
1386 chandef->chan->center_freq);
1387 }
1388
1389 /* insert custom IEs that go before HT */
1390 if (ie && ie_len) {
1391 static const u8 before_ht[] = {
1392 WLAN_EID_SSID,
1393 WLAN_EID_SUPP_RATES,
1394 WLAN_EID_REQUEST,
1395 WLAN_EID_EXT_SUPP_RATES,
1396 WLAN_EID_DS_PARAMS,
1397 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1398 };
1399 noffset = ieee80211_ie_split(ie, ie_len,
1400 before_ht, ARRAY_SIZE(before_ht),
1401 *offset);
1402 if (end - pos < noffset - *offset)
1403 goto out_err;
1404 memcpy(pos, ie + *offset, noffset - *offset);
1405 pos += noffset - *offset;
1406 *offset = noffset;
1407 }
1408
1409 if (sband->ht_cap.ht_supported) {
1410 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1411 goto out_err;
1412 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1413 sband->ht_cap.cap);
1414 }
1415
1416 /*
1417 * If adding more here, adjust code in main.c
1418 * that calculates local->scan_ies_len.
1419 */
1420
1421 /* insert custom IEs that go before VHT */
1422 if (ie && ie_len) {
1423 static const u8 before_vht[] = {
1424 WLAN_EID_SSID,
1425 WLAN_EID_SUPP_RATES,
1426 WLAN_EID_REQUEST,
1427 WLAN_EID_EXT_SUPP_RATES,
1428 WLAN_EID_DS_PARAMS,
1429 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1430 WLAN_EID_HT_CAPABILITY,
1431 WLAN_EID_BSS_COEX_2040,
1432 WLAN_EID_EXT_CAPABILITY,
1433 WLAN_EID_SSID_LIST,
1434 WLAN_EID_CHANNEL_USAGE,
1435 WLAN_EID_INTERWORKING,
1436 /* mesh ID can't happen here */
1437 /* 60 GHz can't happen here right now */
1438 };
1439 noffset = ieee80211_ie_split(ie, ie_len,
1440 before_vht, ARRAY_SIZE(before_vht),
1441 *offset);
1442 if (end - pos < noffset - *offset)
1443 goto out_err;
1444 memcpy(pos, ie + *offset, noffset - *offset);
1445 pos += noffset - *offset;
1446 *offset = noffset;
1447 }
1448
1449 /* Check if any channel in this sband supports at least 80 MHz */
1450 for (i = 0; i < sband->n_channels; i++) {
1451 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1452 IEEE80211_CHAN_NO_80MHZ))
1453 continue;
1454
1455 have_80mhz = true;
1456 break;
1457 }
1458
1459 if (sband->vht_cap.vht_supported && have_80mhz) {
1460 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1461 goto out_err;
1462 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1463 sband->vht_cap.cap);
1464 }
1465
1466 return pos - buffer;
1467 out_err:
1468 WARN_ONCE(1, "not enough space for preq IEs\n");
1469 return pos - buffer;
1470}
1471
1472int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1473 size_t buffer_len,
1474 struct ieee80211_scan_ies *ie_desc,
1475 const u8 *ie, size_t ie_len,
1476 u8 bands_used, u32 *rate_masks,
1477 struct cfg80211_chan_def *chandef)
1478{
1479 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1480 int i;
1481
1482 memset(ie_desc, 0, sizeof(*ie_desc));
1483
1484 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1485 if (bands_used & BIT(i)) {
1486 pos += ieee80211_build_preq_ies_band(local,
1487 buffer + pos,
1488 buffer_len - pos,
1489 ie, ie_len, i,
1490 rate_masks[i],
1491 chandef,
1492 &custom_ie_offset);
1493 ie_desc->ies[i] = buffer + old_pos;
1494 ie_desc->len[i] = pos - old_pos;
1495 old_pos = pos;
1496 }
1497 }
1498
1499 /* add any remaining custom IEs */
1500 if (ie && ie_len) {
1501 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1502 "not enough space for preq custom IEs\n"))
1503 return pos;
1504 memcpy(buffer + pos, ie + custom_ie_offset,
1505 ie_len - custom_ie_offset);
1506 ie_desc->common_ies = buffer + pos;
1507 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1508 pos += ie_len - custom_ie_offset;
1509 }
1510
1511 return pos;
1512};
1513
1514struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1515 const u8 *src, const u8 *dst,
1516 u32 ratemask,
1517 struct ieee80211_channel *chan,
1518 const u8 *ssid, size_t ssid_len,
1519 const u8 *ie, size_t ie_len,
1520 bool directed)
1521{
1522 struct ieee80211_local *local = sdata->local;
1523 struct cfg80211_chan_def chandef;
1524 struct sk_buff *skb;
1525 struct ieee80211_mgmt *mgmt;
1526 int ies_len;
1527 u32 rate_masks[NUM_NL80211_BANDS] = {};
1528 struct ieee80211_scan_ies dummy_ie_desc;
1529
1530 /*
1531 * Do not send DS Channel parameter for directed probe requests
1532 * in order to maximize the chance that we get a response. Some
1533 * badly-behaved APs don't respond when this parameter is included.
1534 */
1535 chandef.width = sdata->vif.bss_conf.chandef.width;
1536 if (directed)
1537 chandef.chan = NULL;
1538 else
1539 chandef.chan = chan;
1540
1541 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1542 100 + ie_len);
1543 if (!skb)
1544 return NULL;
1545
1546 rate_masks[chan->band] = ratemask;
1547 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1548 skb_tailroom(skb), &dummy_ie_desc,
1549 ie, ie_len, BIT(chan->band),
1550 rate_masks, &chandef);
1551 skb_put(skb, ies_len);
1552
1553 if (dst) {
1554 mgmt = (struct ieee80211_mgmt *) skb->data;
1555 memcpy(mgmt->da, dst, ETH_ALEN);
1556 memcpy(mgmt->bssid, dst, ETH_ALEN);
1557 }
1558
1559 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1560
1561 return skb;
1562}
1563
1564void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1565 const u8 *src, const u8 *dst,
1566 const u8 *ssid, size_t ssid_len,
1567 const u8 *ie, size_t ie_len,
1568 u32 ratemask, bool directed, u32 tx_flags,
1569 struct ieee80211_channel *channel, bool scan)
1570{
1571 struct sk_buff *skb;
1572
1573 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1574 ssid, ssid_len,
1575 ie, ie_len, directed);
1576 if (skb) {
1577 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1578 if (scan)
1579 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1580 else
1581 ieee80211_tx_skb(sdata, skb);
1582 }
1583}
1584
1585u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1586 struct ieee802_11_elems *elems,
1587 enum nl80211_band band, u32 *basic_rates)
1588{
1589 struct ieee80211_supported_band *sband;
1590 size_t num_rates;
1591 u32 supp_rates, rate_flags;
1592 int i, j, shift;
1593 sband = sdata->local->hw.wiphy->bands[band];
1594
1595 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1596 shift = ieee80211_vif_get_shift(&sdata->vif);
1597
1598 if (WARN_ON(!sband))
1599 return 1;
1600
1601 num_rates = sband->n_bitrates;
1602 supp_rates = 0;
1603 for (i = 0; i < elems->supp_rates_len +
1604 elems->ext_supp_rates_len; i++) {
1605 u8 rate = 0;
1606 int own_rate;
1607 bool is_basic;
1608 if (i < elems->supp_rates_len)
1609 rate = elems->supp_rates[i];
1610 else if (elems->ext_supp_rates)
1611 rate = elems->ext_supp_rates
1612 [i - elems->supp_rates_len];
1613 own_rate = 5 * (rate & 0x7f);
1614 is_basic = !!(rate & 0x80);
1615
1616 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1617 continue;
1618
1619 for (j = 0; j < num_rates; j++) {
1620 int brate;
1621 if ((rate_flags & sband->bitrates[j].flags)
1622 != rate_flags)
1623 continue;
1624
1625 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1626 1 << shift);
1627
1628 if (brate == own_rate) {
1629 supp_rates |= BIT(j);
1630 if (basic_rates && is_basic)
1631 *basic_rates |= BIT(j);
1632 }
1633 }
1634 }
1635 return supp_rates;
1636}
1637
1638void ieee80211_stop_device(struct ieee80211_local *local)
1639{
1640 ieee80211_led_radio(local, false);
1641 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1642
1643 cancel_work_sync(&local->reconfig_filter);
1644
1645 flush_workqueue(local->workqueue);
1646 drv_stop(local);
1647}
1648
1649static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1650 bool aborted)
1651{
1652 /* It's possible that we don't handle the scan completion in
1653 * time during suspend, so if it's still marked as completed
1654 * here, queue the work and flush it to clean things up.
1655 * Instead of calling the worker function directly here, we
1656 * really queue it to avoid potential races with other flows
1657 * scheduling the same work.
1658 */
1659 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1660 /* If coming from reconfiguration failure, abort the scan so
1661 * we don't attempt to continue a partial HW scan - which is
1662 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1663 * completed scan, and a 5 GHz portion is still pending.
1664 */
1665 if (aborted)
1666 set_bit(SCAN_ABORTED, &local->scanning);
1667 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1668 flush_delayed_work(&local->scan_work);
1669 }
1670}
1671
1672static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1673{
1674 struct ieee80211_sub_if_data *sdata;
1675 struct ieee80211_chanctx *ctx;
1676
1677 /*
1678 * We get here if during resume the device can't be restarted properly.
1679 * We might also get here if this happens during HW reset, which is a
1680 * slightly different situation and we need to drop all connections in
1681 * the latter case.
1682 *
1683 * Ask cfg80211 to turn off all interfaces, this will result in more
1684 * warnings but at least we'll then get into a clean stopped state.
1685 */
1686
1687 local->resuming = false;
1688 local->suspended = false;
1689 local->in_reconfig = false;
1690
1691 ieee80211_flush_completed_scan(local, true);
1692
1693 /* scheduled scan clearly can't be running any more, but tell
1694 * cfg80211 and clear local state
1695 */
1696 ieee80211_sched_scan_end(local);
1697
1698 list_for_each_entry(sdata, &local->interfaces, list)
1699 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700
1701 /* Mark channel contexts as not being in the driver any more to avoid
1702 * removing them from the driver during the shutdown process...
1703 */
1704 mutex_lock(&local->chanctx_mtx);
1705 list_for_each_entry(ctx, &local->chanctx_list, list)
1706 ctx->driver_present = false;
1707 mutex_unlock(&local->chanctx_mtx);
1708
1709 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710}
1711
1712static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713 struct ieee80211_sub_if_data *sdata)
1714{
1715 struct ieee80211_chanctx_conf *conf;
1716 struct ieee80211_chanctx *ctx;
1717
1718 if (!local->use_chanctx)
1719 return;
1720
1721 mutex_lock(&local->chanctx_mtx);
1722 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723 lockdep_is_held(&local->chanctx_mtx));
1724 if (conf) {
1725 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726 drv_assign_vif_chanctx(local, sdata, ctx);
1727 }
1728 mutex_unlock(&local->chanctx_mtx);
1729}
1730
1731static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1732{
1733 struct ieee80211_local *local = sdata->local;
1734 struct sta_info *sta;
1735
1736 /* add STAs back */
1737 mutex_lock(&local->sta_mtx);
1738 list_for_each_entry(sta, &local->sta_list, list) {
1739 enum ieee80211_sta_state state;
1740
1741 if (!sta->uploaded || sta->sdata != sdata)
1742 continue;
1743
1744 for (state = IEEE80211_STA_NOTEXIST;
1745 state < sta->sta_state; state++)
1746 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1747 state + 1));
1748 }
1749 mutex_unlock(&local->sta_mtx);
1750}
1751
1752static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1753{
1754 struct cfg80211_nan_func *func, **funcs;
1755 int res, id, i = 0;
1756
1757 res = drv_start_nan(sdata->local, sdata,
1758 &sdata->u.nan.conf);
1759 if (WARN_ON(res))
1760 return res;
1761
1762 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1763 sizeof(*funcs), GFP_KERNEL);
1764 if (!funcs)
1765 return -ENOMEM;
1766
1767 /* Add all the functions:
1768 * This is a little bit ugly. We need to call a potentially sleeping
1769 * callback for each NAN function, so we can't hold the spinlock.
1770 */
1771 spin_lock_bh(&sdata->u.nan.func_lock);
1772
1773 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1774 funcs[i++] = func;
1775
1776 spin_unlock_bh(&sdata->u.nan.func_lock);
1777
1778 for (i = 0; funcs[i]; i++) {
1779 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1780 if (WARN_ON(res))
1781 ieee80211_nan_func_terminated(&sdata->vif,
1782 funcs[i]->instance_id,
1783 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1784 GFP_KERNEL);
1785 }
1786
1787 kfree(funcs);
1788
1789 return 0;
1790}
1791
1792int ieee80211_reconfig(struct ieee80211_local *local)
1793{
1794 struct ieee80211_hw *hw = &local->hw;
1795 struct ieee80211_sub_if_data *sdata;
1796 struct ieee80211_chanctx *ctx;
1797 struct sta_info *sta;
1798 int res, i;
1799 bool reconfig_due_to_wowlan = false;
1800 struct ieee80211_sub_if_data *sched_scan_sdata;
1801 struct cfg80211_sched_scan_request *sched_scan_req;
1802 bool sched_scan_stopped = false;
1803 bool suspended = local->suspended;
1804
1805 /* nothing to do if HW shouldn't run */
1806 if (!local->open_count)
1807 goto wake_up;
1808
1809#ifdef CONFIG_PM
1810 if (suspended)
1811 local->resuming = true;
1812
1813 if (local->wowlan) {
1814 /*
1815 * In the wowlan case, both mac80211 and the device
1816 * are functional when the resume op is called, so
1817 * clear local->suspended so the device could operate
1818 * normally (e.g. pass rx frames).
1819 */
1820 local->suspended = false;
1821 res = drv_resume(local);
1822 local->wowlan = false;
1823 if (res < 0) {
1824 local->resuming = false;
1825 return res;
1826 }
1827 if (res == 0)
1828 goto wake_up;
1829 WARN_ON(res > 1);
1830 /*
1831 * res is 1, which means the driver requested
1832 * to go through a regular reset on wakeup.
1833 * restore local->suspended in this case.
1834 */
1835 reconfig_due_to_wowlan = true;
1836 local->suspended = true;
1837 }
1838#endif
1839
1840 /*
1841 * In case of hw_restart during suspend (without wowlan),
1842 * cancel restart work, as we are reconfiguring the device
1843 * anyway.
1844 * Note that restart_work is scheduled on a frozen workqueue,
1845 * so we can't deadlock in this case.
1846 */
1847 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1848 cancel_work_sync(&local->restart_work);
1849
1850 local->started = false;
1851
1852 /*
1853 * Upon resume hardware can sometimes be goofy due to
1854 * various platform / driver / bus issues, so restarting
1855 * the device may at times not work immediately. Propagate
1856 * the error.
1857 */
1858 res = drv_start(local);
1859 if (res) {
1860 if (suspended)
1861 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1862 else
1863 WARN(1, "Hardware became unavailable during restart.\n");
1864 ieee80211_handle_reconfig_failure(local);
1865 return res;
1866 }
1867
1868 /* setup fragmentation threshold */
1869 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1870
1871 /* setup RTS threshold */
1872 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1873
1874 /* reset coverage class */
1875 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1876
1877 ieee80211_led_radio(local, true);
1878 ieee80211_mod_tpt_led_trig(local,
1879 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1880
1881 /* add interfaces */
1882 sdata = rtnl_dereference(local->monitor_sdata);
1883 if (sdata) {
1884 /* in HW restart it exists already */
1885 WARN_ON(local->resuming);
1886 res = drv_add_interface(local, sdata);
1887 if (WARN_ON(res)) {
1888 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1889 synchronize_net();
1890 kfree(sdata);
1891 }
1892 }
1893
1894 list_for_each_entry(sdata, &local->interfaces, list) {
1895 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1896 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1897 ieee80211_sdata_running(sdata)) {
1898 res = drv_add_interface(local, sdata);
1899 if (WARN_ON(res))
1900 break;
1901 }
1902 }
1903
1904 /* If adding any of the interfaces failed above, roll back and
1905 * report failure.
1906 */
1907 if (res) {
1908 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1909 list)
1910 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1911 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1912 ieee80211_sdata_running(sdata))
1913 drv_remove_interface(local, sdata);
1914 ieee80211_handle_reconfig_failure(local);
1915 return res;
1916 }
1917
1918 /* add channel contexts */
1919 if (local->use_chanctx) {
1920 mutex_lock(&local->chanctx_mtx);
1921 list_for_each_entry(ctx, &local->chanctx_list, list)
1922 if (ctx->replace_state !=
1923 IEEE80211_CHANCTX_REPLACES_OTHER)
1924 WARN_ON(drv_add_chanctx(local, ctx));
1925 mutex_unlock(&local->chanctx_mtx);
1926
1927 sdata = rtnl_dereference(local->monitor_sdata);
1928 if (sdata && ieee80211_sdata_running(sdata))
1929 ieee80211_assign_chanctx(local, sdata);
1930 }
1931
1932 /* reconfigure hardware */
1933 ieee80211_hw_config(local, ~0);
1934
1935 ieee80211_configure_filter(local);
1936
1937 /* Finally also reconfigure all the BSS information */
1938 list_for_each_entry(sdata, &local->interfaces, list) {
1939 u32 changed;
1940
1941 if (!ieee80211_sdata_running(sdata))
1942 continue;
1943
1944 ieee80211_assign_chanctx(local, sdata);
1945
1946 switch (sdata->vif.type) {
1947 case NL80211_IFTYPE_AP_VLAN:
1948 case NL80211_IFTYPE_MONITOR:
1949 break;
1950 default:
1951 ieee80211_reconfig_stations(sdata);
1952 /* fall through */
1953 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1954 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1955 drv_conf_tx(local, sdata, i,
1956 &sdata->tx_conf[i]);
1957 break;
1958 }
1959
1960 /* common change flags for all interface types */
1961 changed = BSS_CHANGED_ERP_CTS_PROT |
1962 BSS_CHANGED_ERP_PREAMBLE |
1963 BSS_CHANGED_ERP_SLOT |
1964 BSS_CHANGED_HT |
1965 BSS_CHANGED_BASIC_RATES |
1966 BSS_CHANGED_BEACON_INT |
1967 BSS_CHANGED_BSSID |
1968 BSS_CHANGED_CQM |
1969 BSS_CHANGED_QOS |
1970 BSS_CHANGED_IDLE |
1971 BSS_CHANGED_TXPOWER;
1972
1973 if (sdata->vif.mu_mimo_owner)
1974 changed |= BSS_CHANGED_MU_GROUPS;
1975
1976 switch (sdata->vif.type) {
1977 case NL80211_IFTYPE_STATION:
1978 changed |= BSS_CHANGED_ASSOC |
1979 BSS_CHANGED_ARP_FILTER |
1980 BSS_CHANGED_PS;
1981
1982 /* Re-send beacon info report to the driver */
1983 if (sdata->u.mgd.have_beacon)
1984 changed |= BSS_CHANGED_BEACON_INFO;
1985
1986 sdata_lock(sdata);
1987 ieee80211_bss_info_change_notify(sdata, changed);
1988 sdata_unlock(sdata);
1989 break;
1990 case NL80211_IFTYPE_OCB:
1991 changed |= BSS_CHANGED_OCB;
1992 ieee80211_bss_info_change_notify(sdata, changed);
1993 break;
1994 case NL80211_IFTYPE_ADHOC:
1995 changed |= BSS_CHANGED_IBSS;
1996 /* fall through */
1997 case NL80211_IFTYPE_AP:
1998 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1999
2000 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2001 changed |= BSS_CHANGED_AP_PROBE_RESP;
2002
2003 if (rcu_access_pointer(sdata->u.ap.beacon))
2004 drv_start_ap(local, sdata);
2005 }
2006
2007 /* fall through */
2008 case NL80211_IFTYPE_MESH_POINT:
2009 if (sdata->vif.bss_conf.enable_beacon) {
2010 changed |= BSS_CHANGED_BEACON |
2011 BSS_CHANGED_BEACON_ENABLED;
2012 ieee80211_bss_info_change_notify(sdata, changed);
2013 }
2014 break;
2015 case NL80211_IFTYPE_NAN:
2016 res = ieee80211_reconfig_nan(sdata);
2017 if (res < 0) {
2018 ieee80211_handle_reconfig_failure(local);
2019 return res;
2020 }
2021 break;
2022 case NL80211_IFTYPE_WDS:
2023 case NL80211_IFTYPE_AP_VLAN:
2024 case NL80211_IFTYPE_MONITOR:
2025 case NL80211_IFTYPE_P2P_DEVICE:
2026 /* nothing to do */
2027 break;
2028 case NL80211_IFTYPE_UNSPECIFIED:
2029 case NUM_NL80211_IFTYPES:
2030 case NL80211_IFTYPE_P2P_CLIENT:
2031 case NL80211_IFTYPE_P2P_GO:
2032 WARN_ON(1);
2033 break;
2034 }
2035 }
2036
2037 ieee80211_recalc_ps(local);
2038
2039 /*
2040 * The sta might be in psm against the ap (e.g. because
2041 * this was the state before a hw restart), so we
2042 * explicitly send a null packet in order to make sure
2043 * it'll sync against the ap (and get out of psm).
2044 */
2045 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2046 list_for_each_entry(sdata, &local->interfaces, list) {
2047 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2048 continue;
2049 if (!sdata->u.mgd.associated)
2050 continue;
2051
2052 ieee80211_send_nullfunc(local, sdata, false);
2053 }
2054 }
2055
2056 /* APs are now beaconing, add back stations */
2057 mutex_lock(&local->sta_mtx);
2058 list_for_each_entry(sta, &local->sta_list, list) {
2059 enum ieee80211_sta_state state;
2060
2061 if (!sta->uploaded)
2062 continue;
2063
2064 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2065 continue;
2066
2067 for (state = IEEE80211_STA_NOTEXIST;
2068 state < sta->sta_state; state++)
2069 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2070 state + 1));
2071 }
2072 mutex_unlock(&local->sta_mtx);
2073
2074 /* add back keys */
2075 list_for_each_entry(sdata, &local->interfaces, list)
2076 ieee80211_reset_crypto_tx_tailroom(sdata);
2077
2078 list_for_each_entry(sdata, &local->interfaces, list)
2079 if (ieee80211_sdata_running(sdata))
2080 ieee80211_enable_keys(sdata);
2081
2082 /* Reconfigure sched scan if it was interrupted by FW restart */
2083 mutex_lock(&local->mtx);
2084 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2085 lockdep_is_held(&local->mtx));
2086 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2087 lockdep_is_held(&local->mtx));
2088 if (sched_scan_sdata && sched_scan_req)
2089 /*
2090 * Sched scan stopped, but we don't want to report it. Instead,
2091 * we're trying to reschedule. However, if more than one scan
2092 * plan was set, we cannot reschedule since we don't know which
2093 * scan plan was currently running (and some scan plans may have
2094 * already finished).
2095 */
2096 if (sched_scan_req->n_scan_plans > 1 ||
2097 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2098 sched_scan_req)) {
2099 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2100 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2101 sched_scan_stopped = true;
2102 }
2103 mutex_unlock(&local->mtx);
2104
2105 if (sched_scan_stopped)
2106 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2107
2108 wake_up:
2109 if (local->in_reconfig) {
2110 local->in_reconfig = false;
2111 barrier();
2112
2113 /* Restart deferred ROCs */
2114 mutex_lock(&local->mtx);
2115 ieee80211_start_next_roc(local);
2116 mutex_unlock(&local->mtx);
2117 }
2118
2119 if (local->monitors == local->open_count && local->monitors > 0)
2120 ieee80211_add_virtual_monitor(local);
2121
2122 /*
2123 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2124 * sessions can be established after a resume.
2125 *
2126 * Also tear down aggregation sessions since reconfiguring
2127 * them in a hardware restart scenario is not easily done
2128 * right now, and the hardware will have lost information
2129 * about the sessions, but we and the AP still think they
2130 * are active. This is really a workaround though.
2131 */
2132 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2133 mutex_lock(&local->sta_mtx);
2134
2135 list_for_each_entry(sta, &local->sta_list, list) {
2136 if (!local->resuming)
2137 ieee80211_sta_tear_down_BA_sessions(
2138 sta, AGG_STOP_LOCAL_REQUEST);
2139 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2140 }
2141
2142 mutex_unlock(&local->sta_mtx);
2143 }
2144
2145 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2146 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2147 false);
2148
2149 /*
2150 * If this is for hw restart things are still running.
2151 * We may want to change that later, however.
2152 */
2153 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2154 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2155
2156 if (!suspended)
2157 return 0;
2158
2159#ifdef CONFIG_PM
2160 /* first set suspended false, then resuming */
2161 local->suspended = false;
2162 mb();
2163 local->resuming = false;
2164
2165 ieee80211_flush_completed_scan(local, false);
2166
2167 if (local->open_count && !reconfig_due_to_wowlan)
2168 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2169
2170 list_for_each_entry(sdata, &local->interfaces, list) {
2171 if (!ieee80211_sdata_running(sdata))
2172 continue;
2173 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2174 ieee80211_sta_restart(sdata);
2175 }
2176
2177 mod_timer(&local->sta_cleanup, jiffies + 1);
2178#else
2179 WARN_ON(1);
2180#endif
2181
2182 return 0;
2183}
2184
2185void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2186{
2187 struct ieee80211_sub_if_data *sdata;
2188 struct ieee80211_local *local;
2189 struct ieee80211_key *key;
2190
2191 if (WARN_ON(!vif))
2192 return;
2193
2194 sdata = vif_to_sdata(vif);
2195 local = sdata->local;
2196
2197 if (WARN_ON(!local->resuming))
2198 return;
2199
2200 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2201 return;
2202
2203 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2204
2205 mutex_lock(&local->key_mtx);
2206 list_for_each_entry(key, &sdata->key_list, list)
2207 key->flags |= KEY_FLAG_TAINTED;
2208 mutex_unlock(&local->key_mtx);
2209}
2210EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2211
2212void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2213{
2214 struct ieee80211_local *local = sdata->local;
2215 struct ieee80211_chanctx_conf *chanctx_conf;
2216 struct ieee80211_chanctx *chanctx;
2217
2218 mutex_lock(&local->chanctx_mtx);
2219
2220 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2221 lockdep_is_held(&local->chanctx_mtx));
2222
2223 /*
2224 * This function can be called from a work, thus it may be possible
2225 * that the chanctx_conf is removed (due to a disconnection, for
2226 * example).
2227 * So nothing should be done in such case.
2228 */
2229 if (!chanctx_conf)
2230 goto unlock;
2231
2232 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2233 ieee80211_recalc_smps_chanctx(local, chanctx);
2234 unlock:
2235 mutex_unlock(&local->chanctx_mtx);
2236}
2237
2238void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2239{
2240 struct ieee80211_local *local = sdata->local;
2241 struct ieee80211_chanctx_conf *chanctx_conf;
2242 struct ieee80211_chanctx *chanctx;
2243
2244 mutex_lock(&local->chanctx_mtx);
2245
2246 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2247 lockdep_is_held(&local->chanctx_mtx));
2248
2249 if (WARN_ON_ONCE(!chanctx_conf))
2250 goto unlock;
2251
2252 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2253 ieee80211_recalc_chanctx_min_def(local, chanctx);
2254 unlock:
2255 mutex_unlock(&local->chanctx_mtx);
2256}
2257
2258size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2259{
2260 size_t pos = offset;
2261
2262 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2263 pos += 2 + ies[pos + 1];
2264
2265 return pos;
2266}
2267
2268static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2269 int rssi_min_thold,
2270 int rssi_max_thold)
2271{
2272 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2273
2274 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2275 return;
2276
2277 /*
2278 * Scale up threshold values before storing it, as the RSSI averaging
2279 * algorithm uses a scaled up value as well. Change this scaling
2280 * factor if the RSSI averaging algorithm changes.
2281 */
2282 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2283 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2284}
2285
2286void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2287 int rssi_min_thold,
2288 int rssi_max_thold)
2289{
2290 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2291
2292 WARN_ON(rssi_min_thold == rssi_max_thold ||
2293 rssi_min_thold > rssi_max_thold);
2294
2295 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2296 rssi_max_thold);
2297}
2298EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2299
2300void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2301{
2302 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2303
2304 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2305}
2306EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2307
2308u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2309 u16 cap)
2310{
2311 __le16 tmp;
2312
2313 *pos++ = WLAN_EID_HT_CAPABILITY;
2314 *pos++ = sizeof(struct ieee80211_ht_cap);
2315 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2316
2317 /* capability flags */
2318 tmp = cpu_to_le16(cap);
2319 memcpy(pos, &tmp, sizeof(u16));
2320 pos += sizeof(u16);
2321
2322 /* AMPDU parameters */
2323 *pos++ = ht_cap->ampdu_factor |
2324 (ht_cap->ampdu_density <<
2325 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2326
2327 /* MCS set */
2328 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2329 pos += sizeof(ht_cap->mcs);
2330
2331 /* extended capabilities */
2332 pos += sizeof(__le16);
2333
2334 /* BF capabilities */
2335 pos += sizeof(__le32);
2336
2337 /* antenna selection */
2338 pos += sizeof(u8);
2339
2340 return pos;
2341}
2342
2343u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2344 u32 cap)
2345{
2346 __le32 tmp;
2347
2348 *pos++ = WLAN_EID_VHT_CAPABILITY;
2349 *pos++ = sizeof(struct ieee80211_vht_cap);
2350 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2351
2352 /* capability flags */
2353 tmp = cpu_to_le32(cap);
2354 memcpy(pos, &tmp, sizeof(u32));
2355 pos += sizeof(u32);
2356
2357 /* VHT MCS set */
2358 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2359 pos += sizeof(vht_cap->vht_mcs);
2360
2361 return pos;
2362}
2363
2364u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2365 const struct cfg80211_chan_def *chandef,
2366 u16 prot_mode, bool rifs_mode)
2367{
2368 struct ieee80211_ht_operation *ht_oper;
2369 /* Build HT Information */
2370 *pos++ = WLAN_EID_HT_OPERATION;
2371 *pos++ = sizeof(struct ieee80211_ht_operation);
2372 ht_oper = (struct ieee80211_ht_operation *)pos;
2373 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2374 chandef->chan->center_freq);
2375 switch (chandef->width) {
2376 case NL80211_CHAN_WIDTH_160:
2377 case NL80211_CHAN_WIDTH_80P80:
2378 case NL80211_CHAN_WIDTH_80:
2379 case NL80211_CHAN_WIDTH_40:
2380 if (chandef->center_freq1 > chandef->chan->center_freq)
2381 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2382 else
2383 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2384 break;
2385 default:
2386 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2387 break;
2388 }
2389 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2390 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2391 chandef->width != NL80211_CHAN_WIDTH_20)
2392 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2393
2394 if (rifs_mode)
2395 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2396
2397 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2398 ht_oper->stbc_param = 0x0000;
2399
2400 /* It seems that Basic MCS set and Supported MCS set
2401 are identical for the first 10 bytes */
2402 memset(&ht_oper->basic_set, 0, 16);
2403 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2404
2405 return pos + sizeof(struct ieee80211_ht_operation);
2406}
2407
2408u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2409 const struct cfg80211_chan_def *chandef)
2410{
2411 struct ieee80211_vht_operation *vht_oper;
2412
2413 *pos++ = WLAN_EID_VHT_OPERATION;
2414 *pos++ = sizeof(struct ieee80211_vht_operation);
2415 vht_oper = (struct ieee80211_vht_operation *)pos;
2416 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2417 chandef->center_freq1);
2418 if (chandef->center_freq2)
2419 vht_oper->center_freq_seg2_idx =
2420 ieee80211_frequency_to_channel(chandef->center_freq2);
2421 else
2422 vht_oper->center_freq_seg2_idx = 0x00;
2423
2424 switch (chandef->width) {
2425 case NL80211_CHAN_WIDTH_160:
2426 /*
2427 * Convert 160 MHz channel width to new style as interop
2428 * workaround.
2429 */
2430 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2431 vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx;
2432 if (chandef->chan->center_freq < chandef->center_freq1)
2433 vht_oper->center_freq_seg1_idx -= 8;
2434 else
2435 vht_oper->center_freq_seg1_idx += 8;
2436 break;
2437 case NL80211_CHAN_WIDTH_80P80:
2438 /*
2439 * Convert 80+80 MHz channel width to new style as interop
2440 * workaround.
2441 */
2442 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2443 break;
2444 case NL80211_CHAN_WIDTH_80:
2445 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2446 break;
2447 default:
2448 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2449 break;
2450 }
2451
2452 /* don't require special VHT peer rates */
2453 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2454
2455 return pos + sizeof(struct ieee80211_vht_operation);
2456}
2457
2458bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2459 struct cfg80211_chan_def *chandef)
2460{
2461 enum nl80211_channel_type channel_type;
2462
2463 if (!ht_oper)
2464 return false;
2465
2466 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2467 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2468 channel_type = NL80211_CHAN_HT20;
2469 break;
2470 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2471 channel_type = NL80211_CHAN_HT40PLUS;
2472 break;
2473 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2474 channel_type = NL80211_CHAN_HT40MINUS;
2475 break;
2476 default:
2477 channel_type = NL80211_CHAN_NO_HT;
2478 return false;
2479 }
2480
2481 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2482 return true;
2483}
2484
2485bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2486 struct cfg80211_chan_def *chandef)
2487{
2488 struct cfg80211_chan_def new = *chandef;
2489 int cf1, cf2;
2490
2491 if (!oper)
2492 return false;
2493
2494 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2495 chandef->chan->band);
2496 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2497 chandef->chan->band);
2498
2499 switch (oper->chan_width) {
2500 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2501 break;
2502 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2503 new.width = NL80211_CHAN_WIDTH_80;
2504 new.center_freq1 = cf1;
2505 /* If needed, adjust based on the newer interop workaround. */
2506 if (oper->center_freq_seg2_idx) {
2507 unsigned int diff;
2508
2509 diff = abs(oper->center_freq_seg2_idx -
2510 oper->center_freq_seg1_idx);
2511 if (diff == 8) {
2512 new.width = NL80211_CHAN_WIDTH_160;
2513 new.center_freq1 = cf2;
2514 } else if (diff > 8) {
2515 new.width = NL80211_CHAN_WIDTH_80P80;
2516 new.center_freq2 = cf2;
2517 }
2518 }
2519 break;
2520 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2521 new.width = NL80211_CHAN_WIDTH_160;
2522 new.center_freq1 = cf1;
2523 break;
2524 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2525 new.width = NL80211_CHAN_WIDTH_80P80;
2526 new.center_freq1 = cf1;
2527 new.center_freq2 = cf2;
2528 break;
2529 default:
2530 return false;
2531 }
2532
2533 if (!cfg80211_chandef_valid(&new))
2534 return false;
2535
2536 *chandef = new;
2537 return true;
2538}
2539
2540int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2541 const struct ieee80211_supported_band *sband,
2542 const u8 *srates, int srates_len, u32 *rates)
2543{
2544 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2545 int shift = ieee80211_chandef_get_shift(chandef);
2546 struct ieee80211_rate *br;
2547 int brate, rate, i, j, count = 0;
2548
2549 *rates = 0;
2550
2551 for (i = 0; i < srates_len; i++) {
2552 rate = srates[i] & 0x7f;
2553
2554 for (j = 0; j < sband->n_bitrates; j++) {
2555 br = &sband->bitrates[j];
2556 if ((rate_flags & br->flags) != rate_flags)
2557 continue;
2558
2559 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2560 if (brate == rate) {
2561 *rates |= BIT(j);
2562 count++;
2563 break;
2564 }
2565 }
2566 }
2567 return count;
2568}
2569
2570int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2571 struct sk_buff *skb, bool need_basic,
2572 enum nl80211_band band)
2573{
2574 struct ieee80211_local *local = sdata->local;
2575 struct ieee80211_supported_band *sband;
2576 int rate, shift;
2577 u8 i, rates, *pos;
2578 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2579 u32 rate_flags;
2580
2581 shift = ieee80211_vif_get_shift(&sdata->vif);
2582 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2583 sband = local->hw.wiphy->bands[band];
2584 rates = 0;
2585 for (i = 0; i < sband->n_bitrates; i++) {
2586 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2587 continue;
2588 rates++;
2589 }
2590 if (rates > 8)
2591 rates = 8;
2592
2593 if (skb_tailroom(skb) < rates + 2)
2594 return -ENOMEM;
2595
2596 pos = skb_put(skb, rates + 2);
2597 *pos++ = WLAN_EID_SUPP_RATES;
2598 *pos++ = rates;
2599 for (i = 0; i < rates; i++) {
2600 u8 basic = 0;
2601 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2602 continue;
2603
2604 if (need_basic && basic_rates & BIT(i))
2605 basic = 0x80;
2606 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2607 5 * (1 << shift));
2608 *pos++ = basic | (u8) rate;
2609 }
2610
2611 return 0;
2612}
2613
2614int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2615 struct sk_buff *skb, bool need_basic,
2616 enum nl80211_band band)
2617{
2618 struct ieee80211_local *local = sdata->local;
2619 struct ieee80211_supported_band *sband;
2620 int rate, shift;
2621 u8 i, exrates, *pos;
2622 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2623 u32 rate_flags;
2624
2625 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2626 shift = ieee80211_vif_get_shift(&sdata->vif);
2627
2628 sband = local->hw.wiphy->bands[band];
2629 exrates = 0;
2630 for (i = 0; i < sband->n_bitrates; i++) {
2631 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2632 continue;
2633 exrates++;
2634 }
2635
2636 if (exrates > 8)
2637 exrates -= 8;
2638 else
2639 exrates = 0;
2640
2641 if (skb_tailroom(skb) < exrates + 2)
2642 return -ENOMEM;
2643
2644 if (exrates) {
2645 pos = skb_put(skb, exrates + 2);
2646 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2647 *pos++ = exrates;
2648 for (i = 8; i < sband->n_bitrates; i++) {
2649 u8 basic = 0;
2650 if ((rate_flags & sband->bitrates[i].flags)
2651 != rate_flags)
2652 continue;
2653 if (need_basic && basic_rates & BIT(i))
2654 basic = 0x80;
2655 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2656 5 * (1 << shift));
2657 *pos++ = basic | (u8) rate;
2658 }
2659 }
2660 return 0;
2661}
2662
2663int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2664{
2665 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2666 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2667
2668 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2669 /* non-managed type inferfaces */
2670 return 0;
2671 }
2672 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2673}
2674EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2675
2676u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2677{
2678 if (!mcs)
2679 return 1;
2680
2681 /* TODO: consider rx_highest */
2682
2683 if (mcs->rx_mask[3])
2684 return 4;
2685 if (mcs->rx_mask[2])
2686 return 3;
2687 if (mcs->rx_mask[1])
2688 return 2;
2689 return 1;
2690}
2691
2692/**
2693 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2694 * @local: mac80211 hw info struct
2695 * @status: RX status
2696 * @mpdu_len: total MPDU length (including FCS)
2697 * @mpdu_offset: offset into MPDU to calculate timestamp at
2698 *
2699 * This function calculates the RX timestamp at the given MPDU offset, taking
2700 * into account what the RX timestamp was. An offset of 0 will just normalize
2701 * the timestamp to TSF at beginning of MPDU reception.
2702 */
2703u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2704 struct ieee80211_rx_status *status,
2705 unsigned int mpdu_len,
2706 unsigned int mpdu_offset)
2707{
2708 u64 ts = status->mactime;
2709 struct rate_info ri;
2710 u16 rate;
2711
2712 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2713 return 0;
2714
2715 memset(&ri, 0, sizeof(ri));
2716
2717 /* Fill cfg80211 rate info */
2718 if (status->flag & RX_FLAG_HT) {
2719 ri.mcs = status->rate_idx;
2720 ri.flags |= RATE_INFO_FLAGS_MCS;
2721 if (status->flag & RX_FLAG_40MHZ)
2722 ri.bw = RATE_INFO_BW_40;
2723 else
2724 ri.bw = RATE_INFO_BW_20;
2725 if (status->flag & RX_FLAG_SHORT_GI)
2726 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2727 } else if (status->flag & RX_FLAG_VHT) {
2728 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2729 ri.mcs = status->rate_idx;
2730 ri.nss = status->vht_nss;
2731 if (status->flag & RX_FLAG_40MHZ)
2732 ri.bw = RATE_INFO_BW_40;
2733 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2734 ri.bw = RATE_INFO_BW_80;
2735 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2736 ri.bw = RATE_INFO_BW_160;
2737 else
2738 ri.bw = RATE_INFO_BW_20;
2739 if (status->flag & RX_FLAG_SHORT_GI)
2740 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2741 } else {
2742 struct ieee80211_supported_band *sband;
2743 int shift = 0;
2744 int bitrate;
2745
2746 if (status->flag & RX_FLAG_10MHZ) {
2747 shift = 1;
2748 ri.bw = RATE_INFO_BW_10;
2749 } else if (status->flag & RX_FLAG_5MHZ) {
2750 shift = 2;
2751 ri.bw = RATE_INFO_BW_5;
2752 } else {
2753 ri.bw = RATE_INFO_BW_20;
2754 }
2755
2756 sband = local->hw.wiphy->bands[status->band];
2757 bitrate = sband->bitrates[status->rate_idx].bitrate;
2758 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2759
2760 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2761 /* TODO: handle HT/VHT preambles */
2762 if (status->band == NL80211_BAND_5GHZ) {
2763 ts += 20 << shift;
2764 mpdu_offset += 2;
2765 } else if (status->flag & RX_FLAG_SHORTPRE) {
2766 ts += 96;
2767 } else {
2768 ts += 192;
2769 }
2770 }
2771 }
2772
2773 rate = cfg80211_calculate_bitrate(&ri);
2774 if (WARN_ONCE(!rate,
2775 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2776 (unsigned long long)status->flag, status->rate_idx,
2777 status->vht_nss))
2778 return 0;
2779
2780 /* rewind from end of MPDU */
2781 if (status->flag & RX_FLAG_MACTIME_END)
2782 ts -= mpdu_len * 8 * 10 / rate;
2783
2784 ts += mpdu_offset * 8 * 10 / rate;
2785
2786 return ts;
2787}
2788
2789void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2790{
2791 struct ieee80211_sub_if_data *sdata;
2792 struct cfg80211_chan_def chandef;
2793
2794 mutex_lock(&local->mtx);
2795 mutex_lock(&local->iflist_mtx);
2796 list_for_each_entry(sdata, &local->interfaces, list) {
2797 /* it might be waiting for the local->mtx, but then
2798 * by the time it gets it, sdata->wdev.cac_started
2799 * will no longer be true
2800 */
2801 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2802
2803 if (sdata->wdev.cac_started) {
2804 chandef = sdata->vif.bss_conf.chandef;
2805 ieee80211_vif_release_channel(sdata);
2806 cfg80211_cac_event(sdata->dev,
2807 &chandef,
2808 NL80211_RADAR_CAC_ABORTED,
2809 GFP_KERNEL);
2810 }
2811 }
2812 mutex_unlock(&local->iflist_mtx);
2813 mutex_unlock(&local->mtx);
2814}
2815
2816void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2817{
2818 struct ieee80211_local *local =
2819 container_of(work, struct ieee80211_local, radar_detected_work);
2820 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2821 struct ieee80211_chanctx *ctx;
2822 int num_chanctx = 0;
2823
2824 mutex_lock(&local->chanctx_mtx);
2825 list_for_each_entry(ctx, &local->chanctx_list, list) {
2826 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2827 continue;
2828
2829 num_chanctx++;
2830 chandef = ctx->conf.def;
2831 }
2832 mutex_unlock(&local->chanctx_mtx);
2833
2834 ieee80211_dfs_cac_cancel(local);
2835
2836 if (num_chanctx > 1)
2837 /* XXX: multi-channel is not supported yet */
2838 WARN_ON(1);
2839 else
2840 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2841}
2842
2843void ieee80211_radar_detected(struct ieee80211_hw *hw)
2844{
2845 struct ieee80211_local *local = hw_to_local(hw);
2846
2847 trace_api_radar_detected(local);
2848
2849 ieee80211_queue_work(hw, &local->radar_detected_work);
2850}
2851EXPORT_SYMBOL(ieee80211_radar_detected);
2852
2853u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2854{
2855 u32 ret;
2856 int tmp;
2857
2858 switch (c->width) {
2859 case NL80211_CHAN_WIDTH_20:
2860 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2861 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2862 break;
2863 case NL80211_CHAN_WIDTH_40:
2864 c->width = NL80211_CHAN_WIDTH_20;
2865 c->center_freq1 = c->chan->center_freq;
2866 ret = IEEE80211_STA_DISABLE_40MHZ |
2867 IEEE80211_STA_DISABLE_VHT;
2868 break;
2869 case NL80211_CHAN_WIDTH_80:
2870 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2871 /* n_P40 */
2872 tmp /= 2;
2873 /* freq_P40 */
2874 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2875 c->width = NL80211_CHAN_WIDTH_40;
2876 ret = IEEE80211_STA_DISABLE_VHT;
2877 break;
2878 case NL80211_CHAN_WIDTH_80P80:
2879 c->center_freq2 = 0;
2880 c->width = NL80211_CHAN_WIDTH_80;
2881 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2882 IEEE80211_STA_DISABLE_160MHZ;
2883 break;
2884 case NL80211_CHAN_WIDTH_160:
2885 /* n_P20 */
2886 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2887 /* n_P80 */
2888 tmp /= 4;
2889 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2890 c->width = NL80211_CHAN_WIDTH_80;
2891 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2892 IEEE80211_STA_DISABLE_160MHZ;
2893 break;
2894 default:
2895 case NL80211_CHAN_WIDTH_20_NOHT:
2896 WARN_ON_ONCE(1);
2897 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2898 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2899 break;
2900 case NL80211_CHAN_WIDTH_5:
2901 case NL80211_CHAN_WIDTH_10:
2902 WARN_ON_ONCE(1);
2903 /* keep c->width */
2904 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2905 break;
2906 }
2907
2908 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2909
2910 return ret;
2911}
2912
2913/*
2914 * Returns true if smps_mode_new is strictly more restrictive than
2915 * smps_mode_old.
2916 */
2917bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2918 enum ieee80211_smps_mode smps_mode_new)
2919{
2920 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2921 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2922 return false;
2923
2924 switch (smps_mode_old) {
2925 case IEEE80211_SMPS_STATIC:
2926 return false;
2927 case IEEE80211_SMPS_DYNAMIC:
2928 return smps_mode_new == IEEE80211_SMPS_STATIC;
2929 case IEEE80211_SMPS_OFF:
2930 return smps_mode_new != IEEE80211_SMPS_OFF;
2931 default:
2932 WARN_ON(1);
2933 }
2934
2935 return false;
2936}
2937
2938int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2939 struct cfg80211_csa_settings *csa_settings)
2940{
2941 struct sk_buff *skb;
2942 struct ieee80211_mgmt *mgmt;
2943 struct ieee80211_local *local = sdata->local;
2944 int freq;
2945 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2946 sizeof(mgmt->u.action.u.chan_switch);
2947 u8 *pos;
2948
2949 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2950 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2951 return -EOPNOTSUPP;
2952
2953 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2954 5 + /* channel switch announcement element */
2955 3 + /* secondary channel offset element */
2956 8); /* mesh channel switch parameters element */
2957 if (!skb)
2958 return -ENOMEM;
2959
2960 skb_reserve(skb, local->tx_headroom);
2961 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2962 memset(mgmt, 0, hdr_len);
2963 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2964 IEEE80211_STYPE_ACTION);
2965
2966 eth_broadcast_addr(mgmt->da);
2967 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2968 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2969 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2970 } else {
2971 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2972 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2973 }
2974 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2975 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2976 pos = skb_put(skb, 5);
2977 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2978 *pos++ = 3; /* IE length */
2979 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2980 freq = csa_settings->chandef.chan->center_freq;
2981 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2982 *pos++ = csa_settings->count; /* count */
2983
2984 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2985 enum nl80211_channel_type ch_type;
2986
2987 skb_put(skb, 3);
2988 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2989 *pos++ = 1; /* IE length */
2990 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2991 if (ch_type == NL80211_CHAN_HT40PLUS)
2992 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2993 else
2994 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2995 }
2996
2997 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2998 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2999
3000 skb_put(skb, 8);
3001 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3002 *pos++ = 6; /* IE length */
3003 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3004 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3005 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3006 *pos++ |= csa_settings->block_tx ?
3007 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3008 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3009 pos += 2;
3010 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3011 pos += 2;
3012 }
3013
3014 ieee80211_tx_skb(sdata, skb);
3015 return 0;
3016}
3017
3018bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3019{
3020 return !(cs == NULL || cs->cipher == 0 ||
3021 cs->hdr_len < cs->pn_len + cs->pn_off ||
3022 cs->hdr_len <= cs->key_idx_off ||
3023 cs->key_idx_shift > 7 ||
3024 cs->key_idx_mask == 0);
3025}
3026
3027bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3028{
3029 int i;
3030
3031 /* Ensure we have enough iftype bitmap space for all iftype values */
3032 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3033
3034 for (i = 0; i < n; i++)
3035 if (!ieee80211_cs_valid(&cs[i]))
3036 return false;
3037
3038 return true;
3039}
3040
3041const struct ieee80211_cipher_scheme *
3042ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3043 enum nl80211_iftype iftype)
3044{
3045 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3046 int n = local->hw.n_cipher_schemes;
3047 int i;
3048 const struct ieee80211_cipher_scheme *cs = NULL;
3049
3050 for (i = 0; i < n; i++) {
3051 if (l[i].cipher == cipher) {
3052 cs = &l[i];
3053 break;
3054 }
3055 }
3056
3057 if (!cs || !(cs->iftype & BIT(iftype)))
3058 return NULL;
3059
3060 return cs;
3061}
3062
3063int ieee80211_cs_headroom(struct ieee80211_local *local,
3064 struct cfg80211_crypto_settings *crypto,
3065 enum nl80211_iftype iftype)
3066{
3067 const struct ieee80211_cipher_scheme *cs;
3068 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3069 int i;
3070
3071 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3072 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3073 iftype);
3074
3075 if (cs && headroom < cs->hdr_len)
3076 headroom = cs->hdr_len;
3077 }
3078
3079 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3080 if (cs && headroom < cs->hdr_len)
3081 headroom = cs->hdr_len;
3082
3083 return headroom;
3084}
3085
3086static bool
3087ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3088{
3089 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3090 int skip;
3091
3092 if (end > 0)
3093 return false;
3094
3095 /* One shot NOA */
3096 if (data->count[i] == 1)
3097 return false;
3098
3099 if (data->desc[i].interval == 0)
3100 return false;
3101
3102 /* End time is in the past, check for repetitions */
3103 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3104 if (data->count[i] < 255) {
3105 if (data->count[i] <= skip) {
3106 data->count[i] = 0;
3107 return false;
3108 }
3109
3110 data->count[i] -= skip;
3111 }
3112
3113 data->desc[i].start += skip * data->desc[i].interval;
3114
3115 return true;
3116}
3117
3118static bool
3119ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3120 s32 *offset)
3121{
3122 bool ret = false;
3123 int i;
3124
3125 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3126 s32 cur;
3127
3128 if (!data->count[i])
3129 continue;
3130
3131 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3132 ret = true;
3133
3134 cur = data->desc[i].start - tsf;
3135 if (cur > *offset)
3136 continue;
3137
3138 cur = data->desc[i].start + data->desc[i].duration - tsf;
3139 if (cur > *offset)
3140 *offset = cur;
3141 }
3142
3143 return ret;
3144}
3145
3146static u32
3147ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3148{
3149 s32 offset = 0;
3150 int tries = 0;
3151 /*
3152 * arbitrary limit, used to avoid infinite loops when combined NoA
3153 * descriptors cover the full time period.
3154 */
3155 int max_tries = 5;
3156
3157 ieee80211_extend_absent_time(data, tsf, &offset);
3158 do {
3159 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3160 break;
3161
3162 tries++;
3163 } while (tries < max_tries);
3164
3165 return offset;
3166}
3167
3168void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3169{
3170 u32 next_offset = BIT(31) - 1;
3171 int i;
3172
3173 data->absent = 0;
3174 data->has_next_tsf = false;
3175 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3176 s32 start;
3177
3178 if (!data->count[i])
3179 continue;
3180
3181 ieee80211_extend_noa_desc(data, tsf, i);
3182 start = data->desc[i].start - tsf;
3183 if (start <= 0)
3184 data->absent |= BIT(i);
3185
3186 if (next_offset > start)
3187 next_offset = start;
3188
3189 data->has_next_tsf = true;
3190 }
3191
3192 if (data->absent)
3193 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3194
3195 data->next_tsf = tsf + next_offset;
3196}
3197EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3198
3199int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3200 struct ieee80211_noa_data *data, u32 tsf)
3201{
3202 int ret = 0;
3203 int i;
3204
3205 memset(data, 0, sizeof(*data));
3206
3207 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3208 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3209
3210 if (!desc->count || !desc->duration)
3211 continue;
3212
3213 data->count[i] = desc->count;
3214 data->desc[i].start = le32_to_cpu(desc->start_time);
3215 data->desc[i].duration = le32_to_cpu(desc->duration);
3216 data->desc[i].interval = le32_to_cpu(desc->interval);
3217
3218 if (data->count[i] > 1 &&
3219 data->desc[i].interval < data->desc[i].duration)
3220 continue;
3221
3222 ieee80211_extend_noa_desc(data, tsf, i);
3223 ret++;
3224 }
3225
3226 if (ret)
3227 ieee80211_update_p2p_noa(data, tsf);
3228
3229 return ret;
3230}
3231EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3232
3233void ieee80211_recalc_dtim(struct ieee80211_local *local,
3234 struct ieee80211_sub_if_data *sdata)
3235{
3236 u64 tsf = drv_get_tsf(local, sdata);
3237 u64 dtim_count = 0;
3238 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3239 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3240 struct ps_data *ps;
3241 u8 bcns_from_dtim;
3242
3243 if (tsf == -1ULL || !beacon_int || !dtim_period)
3244 return;
3245
3246 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3247 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3248 if (!sdata->bss)
3249 return;
3250
3251 ps = &sdata->bss->ps;
3252 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3253 ps = &sdata->u.mesh.ps;
3254 } else {
3255 return;
3256 }
3257
3258 /*
3259 * actually finds last dtim_count, mac80211 will update in
3260 * __beacon_add_tim().
3261 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3262 */
3263 do_div(tsf, beacon_int);
3264 bcns_from_dtim = do_div(tsf, dtim_period);
3265 /* just had a DTIM */
3266 if (!bcns_from_dtim)
3267 dtim_count = 0;
3268 else
3269 dtim_count = dtim_period - bcns_from_dtim;
3270
3271 ps->dtim_count = dtim_count;
3272}
3273
3274static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3275 struct ieee80211_chanctx *ctx)
3276{
3277 struct ieee80211_sub_if_data *sdata;
3278 u8 radar_detect = 0;
3279
3280 lockdep_assert_held(&local->chanctx_mtx);
3281
3282 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3283 return 0;
3284
3285 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3286 if (sdata->reserved_radar_required)
3287 radar_detect |= BIT(sdata->reserved_chandef.width);
3288
3289 /*
3290 * An in-place reservation context should not have any assigned vifs
3291 * until it replaces the other context.
3292 */
3293 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3294 !list_empty(&ctx->assigned_vifs));
3295
3296 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3297 if (sdata->radar_required)
3298 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3299
3300 return radar_detect;
3301}
3302
3303int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3304 const struct cfg80211_chan_def *chandef,
3305 enum ieee80211_chanctx_mode chanmode,
3306 u8 radar_detect)
3307{
3308 struct ieee80211_local *local = sdata->local;
3309 struct ieee80211_sub_if_data *sdata_iter;
3310 enum nl80211_iftype iftype = sdata->wdev.iftype;
3311 struct ieee80211_chanctx *ctx;
3312 int total = 1;
3313 struct iface_combination_params params = {
3314 .radar_detect = radar_detect,
3315 };
3316
3317 lockdep_assert_held(&local->chanctx_mtx);
3318
3319 if (WARN_ON(hweight32(radar_detect) > 1))
3320 return -EINVAL;
3321
3322 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3323 !chandef->chan))
3324 return -EINVAL;
3325
3326 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3327 return -EINVAL;
3328
3329 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3330 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3331 /*
3332 * always passing this is harmless, since it'll be the
3333 * same value that cfg80211 finds if it finds the same
3334 * interface ... and that's always allowed
3335 */
3336 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3337 }
3338
3339 /* Always allow software iftypes */
3340 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3341 if (radar_detect)
3342 return -EINVAL;
3343 return 0;
3344 }
3345
3346 if (chandef)
3347 params.num_different_channels = 1;
3348
3349 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3350 params.iftype_num[iftype] = 1;
3351
3352 list_for_each_entry(ctx, &local->chanctx_list, list) {
3353 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3354 continue;
3355 params.radar_detect |=
3356 ieee80211_chanctx_radar_detect(local, ctx);
3357 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3358 params.num_different_channels++;
3359 continue;
3360 }
3361 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3362 cfg80211_chandef_compatible(chandef,
3363 &ctx->conf.def))
3364 continue;
3365 params.num_different_channels++;
3366 }
3367
3368 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3369 struct wireless_dev *wdev_iter;
3370
3371 wdev_iter = &sdata_iter->wdev;
3372
3373 if (sdata_iter == sdata ||
3374 !ieee80211_sdata_running(sdata_iter) ||
3375 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3376 continue;
3377
3378 params.iftype_num[wdev_iter->iftype]++;
3379 total++;
3380 }
3381
3382 if (total == 1 && !params.radar_detect)
3383 return 0;
3384
3385 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3386}
3387
3388static void
3389ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3390 void *data)
3391{
3392 u32 *max_num_different_channels = data;
3393
3394 *max_num_different_channels = max(*max_num_different_channels,
3395 c->num_different_channels);
3396}
3397
3398int ieee80211_max_num_channels(struct ieee80211_local *local)
3399{
3400 struct ieee80211_sub_if_data *sdata;
3401 struct ieee80211_chanctx *ctx;
3402 u32 max_num_different_channels = 1;
3403 int err;
3404 struct iface_combination_params params = {0};
3405
3406 lockdep_assert_held(&local->chanctx_mtx);
3407
3408 list_for_each_entry(ctx, &local->chanctx_list, list) {
3409 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3410 continue;
3411
3412 params.num_different_channels++;
3413
3414 params.radar_detect |=
3415 ieee80211_chanctx_radar_detect(local, ctx);
3416 }
3417
3418 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3419 params.iftype_num[sdata->wdev.iftype]++;
3420
3421 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3422 ieee80211_iter_max_chans,
3423 &max_num_different_channels);
3424 if (err < 0)
3425 return err;
3426
3427 return max_num_different_channels;
3428}
3429
3430u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3431{
3432 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3433 *buf++ = 7; /* len */
3434 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3435 *buf++ = 0x50;
3436 *buf++ = 0xf2;
3437 *buf++ = 2; /* WME */
3438 *buf++ = 0; /* WME info */
3439 *buf++ = 1; /* WME ver */
3440 *buf++ = qosinfo; /* U-APSD no in use */
3441
3442 return buf;
3443}
3444
3445void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3446 unsigned long *frame_cnt,
3447 unsigned long *byte_cnt)
3448{
3449 struct txq_info *txqi = to_txq_info(txq);
3450 u32 frag_cnt = 0, frag_bytes = 0;
3451 struct sk_buff *skb;
3452
3453 skb_queue_walk(&txqi->frags, skb) {
3454 frag_cnt++;
3455 frag_bytes += skb->len;
3456 }
3457
3458 if (frame_cnt)
3459 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3460
3461 if (byte_cnt)
3462 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3463}
3464EXPORT_SYMBOL(ieee80211_txq_get_depth);
3465
3466const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3467 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3468 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3469 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3470 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3471};
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/types.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/if_arp.h>
21#include <linux/bitmap.h>
22#include <linux/crc32.h>
23#include <net/net_namespace.h>
24#include <net/cfg80211.h>
25#include <net/rtnetlink.h>
26
27#include "ieee80211_i.h"
28#include "driver-ops.h"
29#include "rate.h"
30#include "mesh.h"
31#include "wme.h"
32#include "led.h"
33#include "wep.h"
34
35/* privid for wiphys to determine whether they belong to us or not */
36void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
37
38struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
39{
40 struct ieee80211_local *local;
41 BUG_ON(!wiphy);
42
43 local = wiphy_priv(wiphy);
44 return &local->hw;
45}
46EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
47
48u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
49 enum nl80211_iftype type)
50{
51 __le16 fc = hdr->frame_control;
52
53 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
54 if (len < 16)
55 return NULL;
56
57 if (ieee80211_is_data(fc)) {
58 if (len < 24) /* drop incorrect hdr len (data) */
59 return NULL;
60
61 if (ieee80211_has_a4(fc))
62 return NULL;
63 if (ieee80211_has_tods(fc))
64 return hdr->addr1;
65 if (ieee80211_has_fromds(fc))
66 return hdr->addr2;
67
68 return hdr->addr3;
69 }
70
71 if (ieee80211_is_mgmt(fc)) {
72 if (len < 24) /* drop incorrect hdr len (mgmt) */
73 return NULL;
74 return hdr->addr3;
75 }
76
77 if (ieee80211_is_ctl(fc)) {
78 if(ieee80211_is_pspoll(fc))
79 return hdr->addr1;
80
81 if (ieee80211_is_back_req(fc)) {
82 switch (type) {
83 case NL80211_IFTYPE_STATION:
84 return hdr->addr2;
85 case NL80211_IFTYPE_AP:
86 case NL80211_IFTYPE_AP_VLAN:
87 return hdr->addr1;
88 default:
89 break; /* fall through to the return */
90 }
91 }
92 }
93
94 return NULL;
95}
96
97void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
98{
99 struct sk_buff *skb = tx->skb;
100 struct ieee80211_hdr *hdr;
101
102 do {
103 hdr = (struct ieee80211_hdr *) skb->data;
104 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
105 } while ((skb = skb->next));
106}
107
108int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
109 int rate, int erp, int short_preamble)
110{
111 int dur;
112
113 /* calculate duration (in microseconds, rounded up to next higher
114 * integer if it includes a fractional microsecond) to send frame of
115 * len bytes (does not include FCS) at the given rate. Duration will
116 * also include SIFS.
117 *
118 * rate is in 100 kbps, so divident is multiplied by 10 in the
119 * DIV_ROUND_UP() operations.
120 */
121
122 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
123 /*
124 * OFDM:
125 *
126 * N_DBPS = DATARATE x 4
127 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
128 * (16 = SIGNAL time, 6 = tail bits)
129 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
130 *
131 * T_SYM = 4 usec
132 * 802.11a - 17.5.2: aSIFSTime = 16 usec
133 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
134 * signal ext = 6 usec
135 */
136 dur = 16; /* SIFS + signal ext */
137 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
138 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
139 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
140 4 * rate); /* T_SYM x N_SYM */
141 } else {
142 /*
143 * 802.11b or 802.11g with 802.11b compatibility:
144 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
145 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
146 *
147 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
148 * aSIFSTime = 10 usec
149 * aPreambleLength = 144 usec or 72 usec with short preamble
150 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
151 */
152 dur = 10; /* aSIFSTime = 10 usec */
153 dur += short_preamble ? (72 + 24) : (144 + 48);
154
155 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
156 }
157
158 return dur;
159}
160
161/* Exported duration function for driver use */
162__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
163 struct ieee80211_vif *vif,
164 size_t frame_len,
165 struct ieee80211_rate *rate)
166{
167 struct ieee80211_local *local = hw_to_local(hw);
168 struct ieee80211_sub_if_data *sdata;
169 u16 dur;
170 int erp;
171 bool short_preamble = false;
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 }
180
181 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
182 short_preamble);
183
184 return cpu_to_le16(dur);
185}
186EXPORT_SYMBOL(ieee80211_generic_frame_duration);
187
188__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
189 struct ieee80211_vif *vif, size_t frame_len,
190 const struct ieee80211_tx_info *frame_txctl)
191{
192 struct ieee80211_local *local = hw_to_local(hw);
193 struct ieee80211_rate *rate;
194 struct ieee80211_sub_if_data *sdata;
195 bool short_preamble;
196 int erp;
197 u16 dur;
198 struct ieee80211_supported_band *sband;
199
200 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
201
202 short_preamble = false;
203
204 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
205
206 erp = 0;
207 if (vif) {
208 sdata = vif_to_sdata(vif);
209 short_preamble = sdata->vif.bss_conf.use_short_preamble;
210 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
211 erp = rate->flags & IEEE80211_RATE_ERP_G;
212 }
213
214 /* CTS duration */
215 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
216 erp, short_preamble);
217 /* Data frame duration */
218 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
219 erp, short_preamble);
220 /* ACK duration */
221 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
222 erp, short_preamble);
223
224 return cpu_to_le16(dur);
225}
226EXPORT_SYMBOL(ieee80211_rts_duration);
227
228__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
229 struct ieee80211_vif *vif,
230 size_t frame_len,
231 const struct ieee80211_tx_info *frame_txctl)
232{
233 struct ieee80211_local *local = hw_to_local(hw);
234 struct ieee80211_rate *rate;
235 struct ieee80211_sub_if_data *sdata;
236 bool short_preamble;
237 int erp;
238 u16 dur;
239 struct ieee80211_supported_band *sband;
240
241 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
242
243 short_preamble = false;
244
245 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
246 erp = 0;
247 if (vif) {
248 sdata = vif_to_sdata(vif);
249 short_preamble = sdata->vif.bss_conf.use_short_preamble;
250 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
251 erp = rate->flags & IEEE80211_RATE_ERP_G;
252 }
253
254 /* Data frame duration */
255 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
256 erp, short_preamble);
257 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
258 /* ACK duration */
259 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
260 erp, short_preamble);
261 }
262
263 return cpu_to_le16(dur);
264}
265EXPORT_SYMBOL(ieee80211_ctstoself_duration);
266
267static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
268 enum queue_stop_reason reason)
269{
270 struct ieee80211_local *local = hw_to_local(hw);
271 struct ieee80211_sub_if_data *sdata;
272
273 trace_wake_queue(local, queue, reason);
274
275 if (WARN_ON(queue >= hw->queues))
276 return;
277
278 __clear_bit(reason, &local->queue_stop_reasons[queue]);
279
280 if (local->queue_stop_reasons[queue] != 0)
281 /* someone still has this queue stopped */
282 return;
283
284 if (skb_queue_empty(&local->pending[queue])) {
285 rcu_read_lock();
286 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
287 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
288 continue;
289 netif_wake_subqueue(sdata->dev, queue);
290 }
291 rcu_read_unlock();
292 } else
293 tasklet_schedule(&local->tx_pending_tasklet);
294}
295
296void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
297 enum queue_stop_reason reason)
298{
299 struct ieee80211_local *local = hw_to_local(hw);
300 unsigned long flags;
301
302 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
303 __ieee80211_wake_queue(hw, queue, reason);
304 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
305}
306
307void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
308{
309 ieee80211_wake_queue_by_reason(hw, queue,
310 IEEE80211_QUEUE_STOP_REASON_DRIVER);
311}
312EXPORT_SYMBOL(ieee80211_wake_queue);
313
314static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
315 enum queue_stop_reason reason)
316{
317 struct ieee80211_local *local = hw_to_local(hw);
318 struct ieee80211_sub_if_data *sdata;
319
320 trace_stop_queue(local, queue, reason);
321
322 if (WARN_ON(queue >= hw->queues))
323 return;
324
325 __set_bit(reason, &local->queue_stop_reasons[queue]);
326
327 rcu_read_lock();
328 list_for_each_entry_rcu(sdata, &local->interfaces, list)
329 netif_stop_subqueue(sdata->dev, queue);
330 rcu_read_unlock();
331}
332
333void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason)
335{
336 struct ieee80211_local *local = hw_to_local(hw);
337 unsigned long flags;
338
339 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
340 __ieee80211_stop_queue(hw, queue, reason);
341 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
342}
343
344void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
345{
346 ieee80211_stop_queue_by_reason(hw, queue,
347 IEEE80211_QUEUE_STOP_REASON_DRIVER);
348}
349EXPORT_SYMBOL(ieee80211_stop_queue);
350
351void ieee80211_add_pending_skb(struct ieee80211_local *local,
352 struct sk_buff *skb)
353{
354 struct ieee80211_hw *hw = &local->hw;
355 unsigned long flags;
356 int queue = skb_get_queue_mapping(skb);
357 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
358
359 if (WARN_ON(!info->control.vif)) {
360 kfree_skb(skb);
361 return;
362 }
363
364 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
365 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
366 __skb_queue_tail(&local->pending[queue], skb);
367 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
369}
370
371int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
372 struct sk_buff_head *skbs,
373 void (*fn)(void *data), void *data)
374{
375 struct ieee80211_hw *hw = &local->hw;
376 struct sk_buff *skb;
377 unsigned long flags;
378 int queue, ret = 0, i;
379
380 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
381 for (i = 0; i < hw->queues; i++)
382 __ieee80211_stop_queue(hw, i,
383 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
384
385 while ((skb = skb_dequeue(skbs))) {
386 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
387
388 if (WARN_ON(!info->control.vif)) {
389 kfree_skb(skb);
390 continue;
391 }
392
393 ret++;
394 queue = skb_get_queue_mapping(skb);
395 __skb_queue_tail(&local->pending[queue], skb);
396 }
397
398 if (fn)
399 fn(data);
400
401 for (i = 0; i < hw->queues; i++)
402 __ieee80211_wake_queue(hw, i,
403 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
404 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
405
406 return ret;
407}
408
409int ieee80211_add_pending_skbs(struct ieee80211_local *local,
410 struct sk_buff_head *skbs)
411{
412 return ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
413}
414
415void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
416 enum queue_stop_reason reason)
417{
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420 int i;
421
422 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
423
424 for (i = 0; i < hw->queues; i++)
425 __ieee80211_stop_queue(hw, i, reason);
426
427 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
428}
429
430void ieee80211_stop_queues(struct ieee80211_hw *hw)
431{
432 ieee80211_stop_queues_by_reason(hw,
433 IEEE80211_QUEUE_STOP_REASON_DRIVER);
434}
435EXPORT_SYMBOL(ieee80211_stop_queues);
436
437int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
438{
439 struct ieee80211_local *local = hw_to_local(hw);
440 unsigned long flags;
441 int ret;
442
443 if (WARN_ON(queue >= hw->queues))
444 return true;
445
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 ret = !!local->queue_stop_reasons[queue];
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449 return ret;
450}
451EXPORT_SYMBOL(ieee80211_queue_stopped);
452
453void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
454 enum queue_stop_reason reason)
455{
456 struct ieee80211_local *local = hw_to_local(hw);
457 unsigned long flags;
458 int i;
459
460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461
462 for (i = 0; i < hw->queues; i++)
463 __ieee80211_wake_queue(hw, i, reason);
464
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466}
467
468void ieee80211_wake_queues(struct ieee80211_hw *hw)
469{
470 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
471}
472EXPORT_SYMBOL(ieee80211_wake_queues);
473
474void ieee80211_iterate_active_interfaces(
475 struct ieee80211_hw *hw,
476 void (*iterator)(void *data, u8 *mac,
477 struct ieee80211_vif *vif),
478 void *data)
479{
480 struct ieee80211_local *local = hw_to_local(hw);
481 struct ieee80211_sub_if_data *sdata;
482
483 mutex_lock(&local->iflist_mtx);
484
485 list_for_each_entry(sdata, &local->interfaces, list) {
486 switch (sdata->vif.type) {
487 case NL80211_IFTYPE_MONITOR:
488 case NL80211_IFTYPE_AP_VLAN:
489 continue;
490 default:
491 break;
492 }
493 if (ieee80211_sdata_running(sdata))
494 iterator(data, sdata->vif.addr,
495 &sdata->vif);
496 }
497
498 mutex_unlock(&local->iflist_mtx);
499}
500EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
501
502void ieee80211_iterate_active_interfaces_atomic(
503 struct ieee80211_hw *hw,
504 void (*iterator)(void *data, u8 *mac,
505 struct ieee80211_vif *vif),
506 void *data)
507{
508 struct ieee80211_local *local = hw_to_local(hw);
509 struct ieee80211_sub_if_data *sdata;
510
511 rcu_read_lock();
512
513 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
514 switch (sdata->vif.type) {
515 case NL80211_IFTYPE_MONITOR:
516 case NL80211_IFTYPE_AP_VLAN:
517 continue;
518 default:
519 break;
520 }
521 if (ieee80211_sdata_running(sdata))
522 iterator(data, sdata->vif.addr,
523 &sdata->vif);
524 }
525
526 rcu_read_unlock();
527}
528EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
529
530/*
531 * Nothing should have been stuffed into the workqueue during
532 * the suspend->resume cycle. If this WARN is seen then there
533 * is a bug with either the driver suspend or something in
534 * mac80211 stuffing into the workqueue which we haven't yet
535 * cleared during mac80211's suspend cycle.
536 */
537static bool ieee80211_can_queue_work(struct ieee80211_local *local)
538{
539 if (WARN(local->suspended && !local->resuming,
540 "queueing ieee80211 work while going to suspend\n"))
541 return false;
542
543 return true;
544}
545
546void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
547{
548 struct ieee80211_local *local = hw_to_local(hw);
549
550 if (!ieee80211_can_queue_work(local))
551 return;
552
553 queue_work(local->workqueue, work);
554}
555EXPORT_SYMBOL(ieee80211_queue_work);
556
557void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
558 struct delayed_work *dwork,
559 unsigned long delay)
560{
561 struct ieee80211_local *local = hw_to_local(hw);
562
563 if (!ieee80211_can_queue_work(local))
564 return;
565
566 queue_delayed_work(local->workqueue, dwork, delay);
567}
568EXPORT_SYMBOL(ieee80211_queue_delayed_work);
569
570void ieee802_11_parse_elems(u8 *start, size_t len,
571 struct ieee802_11_elems *elems)
572{
573 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
574}
575
576u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
577 struct ieee802_11_elems *elems,
578 u64 filter, u32 crc)
579{
580 size_t left = len;
581 u8 *pos = start;
582 bool calc_crc = filter != 0;
583
584 memset(elems, 0, sizeof(*elems));
585 elems->ie_start = start;
586 elems->total_len = len;
587
588 while (left >= 2) {
589 u8 id, elen;
590
591 id = *pos++;
592 elen = *pos++;
593 left -= 2;
594
595 if (elen > left)
596 break;
597
598 if (calc_crc && id < 64 && (filter & (1ULL << id)))
599 crc = crc32_be(crc, pos - 2, elen + 2);
600
601 switch (id) {
602 case WLAN_EID_SSID:
603 elems->ssid = pos;
604 elems->ssid_len = elen;
605 break;
606 case WLAN_EID_SUPP_RATES:
607 elems->supp_rates = pos;
608 elems->supp_rates_len = elen;
609 break;
610 case WLAN_EID_FH_PARAMS:
611 elems->fh_params = pos;
612 elems->fh_params_len = elen;
613 break;
614 case WLAN_EID_DS_PARAMS:
615 elems->ds_params = pos;
616 elems->ds_params_len = elen;
617 break;
618 case WLAN_EID_CF_PARAMS:
619 elems->cf_params = pos;
620 elems->cf_params_len = elen;
621 break;
622 case WLAN_EID_TIM:
623 if (elen >= sizeof(struct ieee80211_tim_ie)) {
624 elems->tim = (void *)pos;
625 elems->tim_len = elen;
626 }
627 break;
628 case WLAN_EID_IBSS_PARAMS:
629 elems->ibss_params = pos;
630 elems->ibss_params_len = elen;
631 break;
632 case WLAN_EID_CHALLENGE:
633 elems->challenge = pos;
634 elems->challenge_len = elen;
635 break;
636 case WLAN_EID_VENDOR_SPECIFIC:
637 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
638 pos[2] == 0xf2) {
639 /* Microsoft OUI (00:50:F2) */
640
641 if (calc_crc)
642 crc = crc32_be(crc, pos - 2, elen + 2);
643
644 if (pos[3] == 1) {
645 /* OUI Type 1 - WPA IE */
646 elems->wpa = pos;
647 elems->wpa_len = elen;
648 } else if (elen >= 5 && pos[3] == 2) {
649 /* OUI Type 2 - WMM IE */
650 if (pos[4] == 0) {
651 elems->wmm_info = pos;
652 elems->wmm_info_len = elen;
653 } else if (pos[4] == 1) {
654 elems->wmm_param = pos;
655 elems->wmm_param_len = elen;
656 }
657 }
658 }
659 break;
660 case WLAN_EID_RSN:
661 elems->rsn = pos;
662 elems->rsn_len = elen;
663 break;
664 case WLAN_EID_ERP_INFO:
665 elems->erp_info = pos;
666 elems->erp_info_len = elen;
667 break;
668 case WLAN_EID_EXT_SUPP_RATES:
669 elems->ext_supp_rates = pos;
670 elems->ext_supp_rates_len = elen;
671 break;
672 case WLAN_EID_HT_CAPABILITY:
673 if (elen >= sizeof(struct ieee80211_ht_cap))
674 elems->ht_cap_elem = (void *)pos;
675 break;
676 case WLAN_EID_HT_INFORMATION:
677 if (elen >= sizeof(struct ieee80211_ht_info))
678 elems->ht_info_elem = (void *)pos;
679 break;
680 case WLAN_EID_MESH_ID:
681 elems->mesh_id = pos;
682 elems->mesh_id_len = elen;
683 break;
684 case WLAN_EID_MESH_CONFIG:
685 if (elen >= sizeof(struct ieee80211_meshconf_ie))
686 elems->mesh_config = (void *)pos;
687 break;
688 case WLAN_EID_PEER_LINK:
689 elems->peer_link = pos;
690 elems->peer_link_len = elen;
691 break;
692 case WLAN_EID_PREQ:
693 elems->preq = pos;
694 elems->preq_len = elen;
695 break;
696 case WLAN_EID_PREP:
697 elems->prep = pos;
698 elems->prep_len = elen;
699 break;
700 case WLAN_EID_PERR:
701 elems->perr = pos;
702 elems->perr_len = elen;
703 break;
704 case WLAN_EID_RANN:
705 if (elen >= sizeof(struct ieee80211_rann_ie))
706 elems->rann = (void *)pos;
707 break;
708 case WLAN_EID_CHANNEL_SWITCH:
709 elems->ch_switch_elem = pos;
710 elems->ch_switch_elem_len = elen;
711 break;
712 case WLAN_EID_QUIET:
713 if (!elems->quiet_elem) {
714 elems->quiet_elem = pos;
715 elems->quiet_elem_len = elen;
716 }
717 elems->num_of_quiet_elem++;
718 break;
719 case WLAN_EID_COUNTRY:
720 elems->country_elem = pos;
721 elems->country_elem_len = elen;
722 break;
723 case WLAN_EID_PWR_CONSTRAINT:
724 elems->pwr_constr_elem = pos;
725 elems->pwr_constr_elem_len = elen;
726 break;
727 case WLAN_EID_TIMEOUT_INTERVAL:
728 elems->timeout_int = pos;
729 elems->timeout_int_len = elen;
730 break;
731 default:
732 break;
733 }
734
735 left -= elen;
736 pos += elen;
737 }
738
739 return crc;
740}
741
742void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
743{
744 struct ieee80211_local *local = sdata->local;
745 struct ieee80211_tx_queue_params qparam;
746 int queue;
747 bool use_11b;
748 int aCWmin, aCWmax;
749
750 if (!local->ops->conf_tx)
751 return;
752
753 memset(&qparam, 0, sizeof(qparam));
754
755 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
756 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
757
758 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
759 /* Set defaults according to 802.11-2007 Table 7-37 */
760 aCWmax = 1023;
761 if (use_11b)
762 aCWmin = 31;
763 else
764 aCWmin = 15;
765
766 switch (queue) {
767 case 3: /* AC_BK */
768 qparam.cw_max = aCWmax;
769 qparam.cw_min = aCWmin;
770 qparam.txop = 0;
771 qparam.aifs = 7;
772 break;
773 default: /* never happens but let's not leave undefined */
774 case 2: /* AC_BE */
775 qparam.cw_max = aCWmax;
776 qparam.cw_min = aCWmin;
777 qparam.txop = 0;
778 qparam.aifs = 3;
779 break;
780 case 1: /* AC_VI */
781 qparam.cw_max = aCWmin;
782 qparam.cw_min = (aCWmin + 1) / 2 - 1;
783 if (use_11b)
784 qparam.txop = 6016/32;
785 else
786 qparam.txop = 3008/32;
787 qparam.aifs = 2;
788 break;
789 case 0: /* AC_VO */
790 qparam.cw_max = (aCWmin + 1) / 2 - 1;
791 qparam.cw_min = (aCWmin + 1) / 4 - 1;
792 if (use_11b)
793 qparam.txop = 3264/32;
794 else
795 qparam.txop = 1504/32;
796 qparam.aifs = 2;
797 break;
798 }
799
800 qparam.uapsd = false;
801
802 local->tx_conf[queue] = qparam;
803 drv_conf_tx(local, queue, &qparam);
804 }
805
806 /* after reinitialize QoS TX queues setting to default,
807 * disable QoS at all */
808
809 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
810 sdata->vif.bss_conf.qos =
811 sdata->vif.type != NL80211_IFTYPE_STATION;
812 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
813 }
814}
815
816void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
817 const size_t supp_rates_len,
818 const u8 *supp_rates)
819{
820 struct ieee80211_local *local = sdata->local;
821 int i, have_higher_than_11mbit = 0;
822
823 /* cf. IEEE 802.11 9.2.12 */
824 for (i = 0; i < supp_rates_len; i++)
825 if ((supp_rates[i] & 0x7f) * 5 > 110)
826 have_higher_than_11mbit = 1;
827
828 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
829 have_higher_than_11mbit)
830 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
831 else
832 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
833
834 ieee80211_set_wmm_default(sdata);
835}
836
837u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
838 enum ieee80211_band band)
839{
840 struct ieee80211_supported_band *sband;
841 struct ieee80211_rate *bitrates;
842 u32 mandatory_rates;
843 enum ieee80211_rate_flags mandatory_flag;
844 int i;
845
846 sband = local->hw.wiphy->bands[band];
847 if (!sband) {
848 WARN_ON(1);
849 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
850 }
851
852 if (band == IEEE80211_BAND_2GHZ)
853 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
854 else
855 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
856
857 bitrates = sband->bitrates;
858 mandatory_rates = 0;
859 for (i = 0; i < sband->n_bitrates; i++)
860 if (bitrates[i].flags & mandatory_flag)
861 mandatory_rates |= BIT(i);
862 return mandatory_rates;
863}
864
865void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
866 u16 transaction, u16 auth_alg,
867 u8 *extra, size_t extra_len, const u8 *bssid,
868 const u8 *key, u8 key_len, u8 key_idx)
869{
870 struct ieee80211_local *local = sdata->local;
871 struct sk_buff *skb;
872 struct ieee80211_mgmt *mgmt;
873 int err;
874
875 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
876 sizeof(*mgmt) + 6 + extra_len);
877 if (!skb) {
878 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
879 "frame\n", sdata->name);
880 return;
881 }
882 skb_reserve(skb, local->hw.extra_tx_headroom);
883
884 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
885 memset(mgmt, 0, 24 + 6);
886 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
887 IEEE80211_STYPE_AUTH);
888 memcpy(mgmt->da, bssid, ETH_ALEN);
889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
890 memcpy(mgmt->bssid, bssid, ETH_ALEN);
891 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
892 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
893 mgmt->u.auth.status_code = cpu_to_le16(0);
894 if (extra)
895 memcpy(skb_put(skb, extra_len), extra, extra_len);
896
897 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
898 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
899 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
900 WARN_ON(err);
901 }
902
903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
904 ieee80211_tx_skb(sdata, skb);
905}
906
907int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
908 const u8 *ie, size_t ie_len,
909 enum ieee80211_band band, u32 rate_mask,
910 u8 channel)
911{
912 struct ieee80211_supported_band *sband;
913 u8 *pos;
914 size_t offset = 0, noffset;
915 int supp_rates_len, i;
916 u8 rates[32];
917 int num_rates;
918 int ext_rates_len;
919
920 sband = local->hw.wiphy->bands[band];
921
922 pos = buffer;
923
924 num_rates = 0;
925 for (i = 0; i < sband->n_bitrates; i++) {
926 if ((BIT(i) & rate_mask) == 0)
927 continue; /* skip rate */
928 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
929 }
930
931 supp_rates_len = min_t(int, num_rates, 8);
932
933 *pos++ = WLAN_EID_SUPP_RATES;
934 *pos++ = supp_rates_len;
935 memcpy(pos, rates, supp_rates_len);
936 pos += supp_rates_len;
937
938 /* insert "request information" if in custom IEs */
939 if (ie && ie_len) {
940 static const u8 before_extrates[] = {
941 WLAN_EID_SSID,
942 WLAN_EID_SUPP_RATES,
943 WLAN_EID_REQUEST,
944 };
945 noffset = ieee80211_ie_split(ie, ie_len,
946 before_extrates,
947 ARRAY_SIZE(before_extrates),
948 offset);
949 memcpy(pos, ie + offset, noffset - offset);
950 pos += noffset - offset;
951 offset = noffset;
952 }
953
954 ext_rates_len = num_rates - supp_rates_len;
955 if (ext_rates_len > 0) {
956 *pos++ = WLAN_EID_EXT_SUPP_RATES;
957 *pos++ = ext_rates_len;
958 memcpy(pos, rates + supp_rates_len, ext_rates_len);
959 pos += ext_rates_len;
960 }
961
962 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
963 *pos++ = WLAN_EID_DS_PARAMS;
964 *pos++ = 1;
965 *pos++ = channel;
966 }
967
968 /* insert custom IEs that go before HT */
969 if (ie && ie_len) {
970 static const u8 before_ht[] = {
971 WLAN_EID_SSID,
972 WLAN_EID_SUPP_RATES,
973 WLAN_EID_REQUEST,
974 WLAN_EID_EXT_SUPP_RATES,
975 WLAN_EID_DS_PARAMS,
976 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
977 };
978 noffset = ieee80211_ie_split(ie, ie_len,
979 before_ht, ARRAY_SIZE(before_ht),
980 offset);
981 memcpy(pos, ie + offset, noffset - offset);
982 pos += noffset - offset;
983 offset = noffset;
984 }
985
986 if (sband->ht_cap.ht_supported) {
987 u16 cap = sband->ht_cap.cap;
988 __le16 tmp;
989
990 *pos++ = WLAN_EID_HT_CAPABILITY;
991 *pos++ = sizeof(struct ieee80211_ht_cap);
992 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
993 tmp = cpu_to_le16(cap);
994 memcpy(pos, &tmp, sizeof(u16));
995 pos += sizeof(u16);
996 *pos++ = sband->ht_cap.ampdu_factor |
997 (sband->ht_cap.ampdu_density <<
998 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
999 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
1000 pos += sizeof(sband->ht_cap.mcs);
1001 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
1002 }
1003
1004 /*
1005 * If adding more here, adjust code in main.c
1006 * that calculates local->scan_ies_len.
1007 */
1008
1009 /* add any remaining custom IEs */
1010 if (ie && ie_len) {
1011 noffset = ie_len;
1012 memcpy(pos, ie + offset, noffset - offset);
1013 pos += noffset - offset;
1014 }
1015
1016 return pos - buffer;
1017}
1018
1019struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1020 u8 *dst, u32 ratemask,
1021 const u8 *ssid, size_t ssid_len,
1022 const u8 *ie, size_t ie_len,
1023 bool directed)
1024{
1025 struct ieee80211_local *local = sdata->local;
1026 struct sk_buff *skb;
1027 struct ieee80211_mgmt *mgmt;
1028 size_t buf_len;
1029 u8 *buf;
1030 u8 chan;
1031
1032 /* FIXME: come up with a proper value */
1033 buf = kmalloc(200 + ie_len, GFP_KERNEL);
1034 if (!buf) {
1035 printk(KERN_DEBUG "%s: failed to allocate temporary IE "
1036 "buffer\n", sdata->name);
1037 return NULL;
1038 }
1039
1040 /*
1041 * Do not send DS Channel parameter for directed probe requests
1042 * in order to maximize the chance that we get a response. Some
1043 * badly-behaved APs don't respond when this parameter is included.
1044 */
1045 if (directed)
1046 chan = 0;
1047 else
1048 chan = ieee80211_frequency_to_channel(
1049 local->hw.conf.channel->center_freq);
1050
1051 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
1052 local->hw.conf.channel->band,
1053 ratemask, chan);
1054
1055 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1056 ssid, ssid_len,
1057 buf, buf_len);
1058
1059 if (dst) {
1060 mgmt = (struct ieee80211_mgmt *) skb->data;
1061 memcpy(mgmt->da, dst, ETH_ALEN);
1062 memcpy(mgmt->bssid, dst, ETH_ALEN);
1063 }
1064
1065 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1066 kfree(buf);
1067
1068 return skb;
1069}
1070
1071void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1072 const u8 *ssid, size_t ssid_len,
1073 const u8 *ie, size_t ie_len,
1074 u32 ratemask, bool directed)
1075{
1076 struct sk_buff *skb;
1077
1078 skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
1079 ie, ie_len, directed);
1080 if (skb)
1081 ieee80211_tx_skb(sdata, skb);
1082}
1083
1084u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1085 struct ieee802_11_elems *elems,
1086 enum ieee80211_band band)
1087{
1088 struct ieee80211_supported_band *sband;
1089 struct ieee80211_rate *bitrates;
1090 size_t num_rates;
1091 u32 supp_rates;
1092 int i, j;
1093 sband = local->hw.wiphy->bands[band];
1094
1095 if (!sband) {
1096 WARN_ON(1);
1097 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1098 }
1099
1100 bitrates = sband->bitrates;
1101 num_rates = sband->n_bitrates;
1102 supp_rates = 0;
1103 for (i = 0; i < elems->supp_rates_len +
1104 elems->ext_supp_rates_len; i++) {
1105 u8 rate = 0;
1106 int own_rate;
1107 if (i < elems->supp_rates_len)
1108 rate = elems->supp_rates[i];
1109 else if (elems->ext_supp_rates)
1110 rate = elems->ext_supp_rates
1111 [i - elems->supp_rates_len];
1112 own_rate = 5 * (rate & 0x7f);
1113 for (j = 0; j < num_rates; j++)
1114 if (bitrates[j].bitrate == own_rate)
1115 supp_rates |= BIT(j);
1116 }
1117 return supp_rates;
1118}
1119
1120void ieee80211_stop_device(struct ieee80211_local *local)
1121{
1122 ieee80211_led_radio(local, false);
1123 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1124
1125 cancel_work_sync(&local->reconfig_filter);
1126
1127 flush_workqueue(local->workqueue);
1128 drv_stop(local);
1129}
1130
1131int ieee80211_reconfig(struct ieee80211_local *local)
1132{
1133 struct ieee80211_hw *hw = &local->hw;
1134 struct ieee80211_sub_if_data *sdata;
1135 struct sta_info *sta;
1136 int res, i;
1137
1138#ifdef CONFIG_PM
1139 if (local->suspended)
1140 local->resuming = true;
1141
1142 if (local->wowlan) {
1143 local->wowlan = false;
1144 res = drv_resume(local);
1145 if (res < 0) {
1146 local->resuming = false;
1147 return res;
1148 }
1149 if (res == 0)
1150 goto wake_up;
1151 WARN_ON(res > 1);
1152 /*
1153 * res is 1, which means the driver requested
1154 * to go through a regular reset on wakeup.
1155 */
1156 }
1157#endif
1158
1159 /* setup fragmentation threshold */
1160 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1161
1162 /* setup RTS threshold */
1163 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1164
1165 /* reset coverage class */
1166 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1167
1168 /* everything else happens only if HW was up & running */
1169 if (!local->open_count)
1170 goto wake_up;
1171
1172 /*
1173 * Upon resume hardware can sometimes be goofy due to
1174 * various platform / driver / bus issues, so restarting
1175 * the device may at times not work immediately. Propagate
1176 * the error.
1177 */
1178 res = drv_start(local);
1179 if (res) {
1180 WARN(local->suspended, "Hardware became unavailable "
1181 "upon resume. This could be a software issue "
1182 "prior to suspend or a hardware issue.\n");
1183 return res;
1184 }
1185
1186 ieee80211_led_radio(local, true);
1187 ieee80211_mod_tpt_led_trig(local,
1188 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1189
1190 /* add interfaces */
1191 list_for_each_entry(sdata, &local->interfaces, list) {
1192 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1193 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1194 ieee80211_sdata_running(sdata))
1195 res = drv_add_interface(local, &sdata->vif);
1196 }
1197
1198 /* add STAs back */
1199 mutex_lock(&local->sta_mtx);
1200 list_for_each_entry(sta, &local->sta_list, list) {
1201 if (sta->uploaded) {
1202 sdata = sta->sdata;
1203 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1204 sdata = container_of(sdata->bss,
1205 struct ieee80211_sub_if_data,
1206 u.ap);
1207
1208 WARN_ON(drv_sta_add(local, sdata, &sta->sta));
1209 }
1210 }
1211 mutex_unlock(&local->sta_mtx);
1212
1213 /* reconfigure tx conf */
1214 for (i = 0; i < hw->queues; i++)
1215 drv_conf_tx(local, i, &local->tx_conf[i]);
1216
1217 /* reconfigure hardware */
1218 ieee80211_hw_config(local, ~0);
1219
1220 ieee80211_configure_filter(local);
1221
1222 /* Finally also reconfigure all the BSS information */
1223 list_for_each_entry(sdata, &local->interfaces, list) {
1224 u32 changed;
1225
1226 if (!ieee80211_sdata_running(sdata))
1227 continue;
1228
1229 /* common change flags for all interface types */
1230 changed = BSS_CHANGED_ERP_CTS_PROT |
1231 BSS_CHANGED_ERP_PREAMBLE |
1232 BSS_CHANGED_ERP_SLOT |
1233 BSS_CHANGED_HT |
1234 BSS_CHANGED_BASIC_RATES |
1235 BSS_CHANGED_BEACON_INT |
1236 BSS_CHANGED_BSSID |
1237 BSS_CHANGED_CQM |
1238 BSS_CHANGED_QOS;
1239
1240 switch (sdata->vif.type) {
1241 case NL80211_IFTYPE_STATION:
1242 changed |= BSS_CHANGED_ASSOC;
1243 mutex_lock(&sdata->u.mgd.mtx);
1244 ieee80211_bss_info_change_notify(sdata, changed);
1245 mutex_unlock(&sdata->u.mgd.mtx);
1246 break;
1247 case NL80211_IFTYPE_ADHOC:
1248 changed |= BSS_CHANGED_IBSS;
1249 /* fall through */
1250 case NL80211_IFTYPE_AP:
1251 case NL80211_IFTYPE_MESH_POINT:
1252 changed |= BSS_CHANGED_BEACON |
1253 BSS_CHANGED_BEACON_ENABLED;
1254 ieee80211_bss_info_change_notify(sdata, changed);
1255 break;
1256 case NL80211_IFTYPE_WDS:
1257 break;
1258 case NL80211_IFTYPE_AP_VLAN:
1259 case NL80211_IFTYPE_MONITOR:
1260 /* ignore virtual */
1261 break;
1262 case NL80211_IFTYPE_UNSPECIFIED:
1263 case NUM_NL80211_IFTYPES:
1264 case NL80211_IFTYPE_P2P_CLIENT:
1265 case NL80211_IFTYPE_P2P_GO:
1266 WARN_ON(1);
1267 break;
1268 }
1269 }
1270
1271 /*
1272 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1273 * sessions can be established after a resume.
1274 *
1275 * Also tear down aggregation sessions since reconfiguring
1276 * them in a hardware restart scenario is not easily done
1277 * right now, and the hardware will have lost information
1278 * about the sessions, but we and the AP still think they
1279 * are active. This is really a workaround though.
1280 */
1281 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1282 mutex_lock(&local->sta_mtx);
1283
1284 list_for_each_entry(sta, &local->sta_list, list) {
1285 ieee80211_sta_tear_down_BA_sessions(sta, true);
1286 clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
1287 }
1288
1289 mutex_unlock(&local->sta_mtx);
1290 }
1291
1292 /* add back keys */
1293 list_for_each_entry(sdata, &local->interfaces, list)
1294 if (ieee80211_sdata_running(sdata))
1295 ieee80211_enable_keys(sdata);
1296
1297 wake_up:
1298 ieee80211_wake_queues_by_reason(hw,
1299 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1300
1301 /*
1302 * If this is for hw restart things are still running.
1303 * We may want to change that later, however.
1304 */
1305 if (!local->suspended)
1306 return 0;
1307
1308#ifdef CONFIG_PM
1309 /* first set suspended false, then resuming */
1310 local->suspended = false;
1311 mb();
1312 local->resuming = false;
1313
1314 list_for_each_entry(sdata, &local->interfaces, list) {
1315 switch(sdata->vif.type) {
1316 case NL80211_IFTYPE_STATION:
1317 ieee80211_sta_restart(sdata);
1318 break;
1319 case NL80211_IFTYPE_ADHOC:
1320 ieee80211_ibss_restart(sdata);
1321 break;
1322 case NL80211_IFTYPE_MESH_POINT:
1323 ieee80211_mesh_restart(sdata);
1324 break;
1325 default:
1326 break;
1327 }
1328 }
1329
1330 mod_timer(&local->sta_cleanup, jiffies + 1);
1331
1332 mutex_lock(&local->sta_mtx);
1333 list_for_each_entry(sta, &local->sta_list, list)
1334 mesh_plink_restart(sta);
1335 mutex_unlock(&local->sta_mtx);
1336#else
1337 WARN_ON(1);
1338#endif
1339 return 0;
1340}
1341
1342void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1343{
1344 struct ieee80211_sub_if_data *sdata;
1345 struct ieee80211_local *local;
1346 struct ieee80211_key *key;
1347
1348 if (WARN_ON(!vif))
1349 return;
1350
1351 sdata = vif_to_sdata(vif);
1352 local = sdata->local;
1353
1354 if (WARN_ON(!local->resuming))
1355 return;
1356
1357 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1358 return;
1359
1360 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1361
1362 mutex_lock(&local->key_mtx);
1363 list_for_each_entry(key, &sdata->key_list, list)
1364 key->flags |= KEY_FLAG_TAINTED;
1365 mutex_unlock(&local->key_mtx);
1366}
1367EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1368
1369static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1370 enum ieee80211_smps_mode *smps_mode)
1371{
1372 if (ifmgd->associated) {
1373 *smps_mode = ifmgd->ap_smps;
1374
1375 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1376 if (ifmgd->powersave)
1377 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1378 else
1379 *smps_mode = IEEE80211_SMPS_OFF;
1380 }
1381
1382 return 1;
1383 }
1384
1385 return 0;
1386}
1387
1388/* must hold iflist_mtx */
1389void ieee80211_recalc_smps(struct ieee80211_local *local)
1390{
1391 struct ieee80211_sub_if_data *sdata;
1392 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1393 int count = 0;
1394
1395 lockdep_assert_held(&local->iflist_mtx);
1396
1397 /*
1398 * This function could be improved to handle multiple
1399 * interfaces better, but right now it makes any
1400 * non-station interfaces force SM PS to be turned
1401 * off. If there are multiple station interfaces it
1402 * could also use the best possible mode, e.g. if
1403 * one is in static and the other in dynamic then
1404 * dynamic is ok.
1405 */
1406
1407 list_for_each_entry(sdata, &local->interfaces, list) {
1408 if (!ieee80211_sdata_running(sdata))
1409 continue;
1410 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1411 goto set;
1412
1413 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1414
1415 if (count > 1) {
1416 smps_mode = IEEE80211_SMPS_OFF;
1417 break;
1418 }
1419 }
1420
1421 if (smps_mode == local->smps_mode)
1422 return;
1423
1424 set:
1425 local->smps_mode = smps_mode;
1426 /* changed flag is auto-detected for this */
1427 ieee80211_hw_config(local, 0);
1428}
1429
1430static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1431{
1432 int i;
1433
1434 for (i = 0; i < n_ids; i++)
1435 if (ids[i] == id)
1436 return true;
1437 return false;
1438}
1439
1440/**
1441 * ieee80211_ie_split - split an IE buffer according to ordering
1442 *
1443 * @ies: the IE buffer
1444 * @ielen: the length of the IE buffer
1445 * @ids: an array with element IDs that are allowed before
1446 * the split
1447 * @n_ids: the size of the element ID array
1448 * @offset: offset where to start splitting in the buffer
1449 *
1450 * This function splits an IE buffer by updating the @offset
1451 * variable to point to the location where the buffer should be
1452 * split.
1453 *
1454 * It assumes that the given IE buffer is well-formed, this
1455 * has to be guaranteed by the caller!
1456 *
1457 * It also assumes that the IEs in the buffer are ordered
1458 * correctly, if not the result of using this function will not
1459 * be ordered correctly either, i.e. it does no reordering.
1460 *
1461 * The function returns the offset where the next part of the
1462 * buffer starts, which may be @ielen if the entire (remainder)
1463 * of the buffer should be used.
1464 */
1465size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1466 const u8 *ids, int n_ids, size_t offset)
1467{
1468 size_t pos = offset;
1469
1470 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1471 pos += 2 + ies[pos + 1];
1472
1473 return pos;
1474}
1475
1476size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1477{
1478 size_t pos = offset;
1479
1480 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1481 pos += 2 + ies[pos + 1];
1482
1483 return pos;
1484}
1485
1486static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1487 int rssi_min_thold,
1488 int rssi_max_thold)
1489{
1490 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1491
1492 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1493 return;
1494
1495 /*
1496 * Scale up threshold values before storing it, as the RSSI averaging
1497 * algorithm uses a scaled up value as well. Change this scaling
1498 * factor if the RSSI averaging algorithm changes.
1499 */
1500 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1501 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1502}
1503
1504void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1505 int rssi_min_thold,
1506 int rssi_max_thold)
1507{
1508 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1509
1510 WARN_ON(rssi_min_thold == rssi_max_thold ||
1511 rssi_min_thold > rssi_max_thold);
1512
1513 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1514 rssi_max_thold);
1515}
1516EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1517
1518void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1519{
1520 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1521
1522 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1523}
1524EXPORT_SYMBOL(ieee80211_disable_rssi_reports);