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Merge tag 'mac80211-next-for-davem-2015-03-30' of git://git.kernel.org/pub/scm/linux...
[deliverable/linux.git] / net / mac80211 / util.c
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * utilities for mac80211
13 */
14
15 #include <net/mac80211.h>
16 #include <linux/netdevice.h>
17 #include <linux/export.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/bitmap.h>
24 #include <linux/crc32.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/rtnetlink.h>
28
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
31 #include "rate.h"
32 #include "mesh.h"
33 #include "wme.h"
34 #include "led.h"
35 #include "wep.h"
36
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39
40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 {
42 struct ieee80211_local *local;
43 BUG_ON(!wiphy);
44
45 local = wiphy_priv(wiphy);
46 return &local->hw;
47 }
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49
50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
51 enum nl80211_iftype type)
52 {
53 __le16 fc = hdr->frame_control;
54
55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (len < 16)
57 return NULL;
58
59 if (ieee80211_is_data(fc)) {
60 if (len < 24) /* drop incorrect hdr len (data) */
61 return NULL;
62
63 if (ieee80211_has_a4(fc))
64 return NULL;
65 if (ieee80211_has_tods(fc))
66 return hdr->addr1;
67 if (ieee80211_has_fromds(fc))
68 return hdr->addr2;
69
70 return hdr->addr3;
71 }
72
73 if (ieee80211_is_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
75 return NULL;
76 return hdr->addr3;
77 }
78
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
81 return hdr->addr1;
82
83 if (ieee80211_is_back_req(fc)) {
84 switch (type) {
85 case NL80211_IFTYPE_STATION:
86 return hdr->addr2;
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
89 return hdr->addr1;
90 default:
91 break; /* fall through to the return */
92 }
93 }
94 }
95
96 return NULL;
97 }
98
99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
100 {
101 struct sk_buff *skb;
102 struct ieee80211_hdr *hdr;
103
104 skb_queue_walk(&tx->skbs, skb) {
105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
107 }
108 }
109
110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
111 int rate, int erp, int short_preamble,
112 int shift)
113 {
114 int dur;
115
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
119 * also include SIFS.
120 *
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
123 *
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
126 */
127
128 if (band == IEEE80211_BAND_5GHZ || erp) {
129 /*
130 * OFDM:
131 *
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
136 *
137 * T_SYM = 4 usec
138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
141 */
142 dur = 16; /* SIFS + signal ext */
143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
149 */
150 dur *= 1 << shift;
151
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
154 */
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
157 } else {
158 /*
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 *
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 */
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
170
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
172 }
173
174 return dur;
175 }
176
177 /* Exported duration function for driver use */
178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
180 enum ieee80211_band band,
181 size_t frame_len,
182 struct ieee80211_rate *rate)
183 {
184 struct ieee80211_sub_if_data *sdata;
185 u16 dur;
186 int erp, shift = 0;
187 bool short_preamble = false;
188
189 erp = 0;
190 if (vif) {
191 sdata = vif_to_sdata(vif);
192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
195 shift = ieee80211_vif_get_shift(vif);
196 }
197
198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
199 short_preamble, shift);
200
201 return cpu_to_le16(dur);
202 }
203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204
205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
207 const struct ieee80211_tx_info *frame_txctl)
208 {
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
211 struct ieee80211_sub_if_data *sdata;
212 bool short_preamble;
213 int erp, shift = 0, bitrate;
214 u16 dur;
215 struct ieee80211_supported_band *sband;
216
217 sband = local->hw.wiphy->bands[frame_txctl->band];
218
219 short_preamble = false;
220
221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
222
223 erp = 0;
224 if (vif) {
225 sdata = vif_to_sdata(vif);
226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
229 shift = ieee80211_vif_get_shift(vif);
230 }
231
232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
233
234 /* CTS duration */
235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 /* Data frame duration */
238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
239 erp, short_preamble, shift);
240 /* ACK duration */
241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
242 erp, short_preamble, shift);
243
244 return cpu_to_le16(dur);
245 }
246 EXPORT_SYMBOL(ieee80211_rts_duration);
247
248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
250 size_t frame_len,
251 const struct ieee80211_tx_info *frame_txctl)
252 {
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
255 struct ieee80211_sub_if_data *sdata;
256 bool short_preamble;
257 int erp, shift = 0, bitrate;
258 u16 dur;
259 struct ieee80211_supported_band *sband;
260
261 sband = local->hw.wiphy->bands[frame_txctl->band];
262
263 short_preamble = false;
264
265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
266 erp = 0;
267 if (vif) {
268 sdata = vif_to_sdata(vif);
269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
272 shift = ieee80211_vif_get_shift(vif);
273 }
274
275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276
277 /* Data frame duration */
278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
279 erp, short_preamble, shift);
280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
281 /* ACK duration */
282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
283 erp, short_preamble, shift);
284 }
285
286 return cpu_to_le16(dur);
287 }
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289
290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291 {
292 struct ieee80211_sub_if_data *sdata;
293 int n_acs = IEEE80211_NUM_ACS;
294
295 if (local->hw.queues < IEEE80211_NUM_ACS)
296 n_acs = 1;
297
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
299 int ac;
300
301 if (!sdata->dev)
302 continue;
303
304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
306 continue;
307
308 for (ac = 0; ac < n_acs; ac++) {
309 int ac_queue = sdata->vif.hw_queue[ac];
310
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
316 }
317 }
318 }
319
320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
321 enum queue_stop_reason reason,
322 bool refcounted)
323 {
324 struct ieee80211_local *local = hw_to_local(hw);
325
326 trace_wake_queue(local, queue, reason);
327
328 if (WARN_ON(queue >= hw->queues))
329 return;
330
331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 return;
333
334 if (!refcounted)
335 local->q_stop_reasons[queue][reason] = 0;
336 else
337 local->q_stop_reasons[queue][reason]--;
338
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345
346 if (skb_queue_empty(&local->pending[queue])) {
347 rcu_read_lock();
348 ieee80211_propagate_queue_wake(local, queue);
349 rcu_read_unlock();
350 } else
351 tasklet_schedule(&local->tx_pending_tasklet);
352 }
353
354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
355 enum queue_stop_reason reason,
356 bool refcounted)
357 {
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364 }
365
366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367 {
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
370 false);
371 }
372 EXPORT_SYMBOL(ieee80211_wake_queue);
373
374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
376 bool refcounted)
377 {
378 struct ieee80211_local *local = hw_to_local(hw);
379 struct ieee80211_sub_if_data *sdata;
380 int n_acs = IEEE80211_NUM_ACS;
381
382 trace_stop_queue(local, queue, reason);
383
384 if (WARN_ON(queue >= hw->queues))
385 return;
386
387 if (!refcounted)
388 local->q_stop_reasons[queue][reason] = 1;
389 else
390 local->q_stop_reasons[queue][reason]++;
391
392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
393 return;
394
395 if (local->hw.queues < IEEE80211_NUM_ACS)
396 n_acs = 1;
397
398 rcu_read_lock();
399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
400 int ac;
401
402 if (!sdata->dev)
403 continue;
404
405 for (ac = 0; ac < n_acs; ac++) {
406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
409 }
410 }
411 rcu_read_unlock();
412 }
413
414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
415 enum queue_stop_reason reason,
416 bool refcounted)
417 {
418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
420
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424 }
425
426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
427 {
428 ieee80211_stop_queue_by_reason(hw, queue,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 false);
431 }
432 EXPORT_SYMBOL(ieee80211_stop_queue);
433
434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
435 struct sk_buff *skb)
436 {
437 struct ieee80211_hw *hw = &local->hw;
438 unsigned long flags;
439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
440 int queue = info->hw_queue;
441
442 if (WARN_ON(!info->control.vif)) {
443 ieee80211_free_txskb(&local->hw, skb);
444 return;
445 }
446
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
449 false);
450 __skb_queue_tail(&local->pending[queue], skb);
451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
452 false);
453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
454 }
455
456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
458 {
459 struct ieee80211_hw *hw = &local->hw;
460 struct sk_buff *skb;
461 unsigned long flags;
462 int queue, i;
463
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465 while ((skb = skb_dequeue(skbs))) {
466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
467
468 if (WARN_ON(!info->control.vif)) {
469 ieee80211_free_txskb(&local->hw, skb);
470 continue;
471 }
472
473 queue = info->hw_queue;
474
475 __ieee80211_stop_queue(hw, queue,
476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
477 false);
478
479 __skb_queue_tail(&local->pending[queue], skb);
480 }
481
482 for (i = 0; i < hw->queues; i++)
483 __ieee80211_wake_queue(hw, i,
484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
485 false);
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
487 }
488
489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
490 unsigned long queues,
491 enum queue_stop_reason reason,
492 bool refcounted)
493 {
494 struct ieee80211_local *local = hw_to_local(hw);
495 unsigned long flags;
496 int i;
497
498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499
500 for_each_set_bit(i, &queues, hw->queues)
501 __ieee80211_stop_queue(hw, i, reason, refcounted);
502
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
504 }
505
506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
507 {
508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
510 false);
511 }
512 EXPORT_SYMBOL(ieee80211_stop_queues);
513
514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
515 {
516 struct ieee80211_local *local = hw_to_local(hw);
517 unsigned long flags;
518 int ret;
519
520 if (WARN_ON(queue >= hw->queues))
521 return true;
522
523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
527 return ret;
528 }
529 EXPORT_SYMBOL(ieee80211_queue_stopped);
530
531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
532 unsigned long queues,
533 enum queue_stop_reason reason,
534 bool refcounted)
535 {
536 struct ieee80211_local *local = hw_to_local(hw);
537 unsigned long flags;
538 int i;
539
540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
541
542 for_each_set_bit(i, &queues, hw->queues)
543 __ieee80211_wake_queue(hw, i, reason, refcounted);
544
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
546 }
547
548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
549 {
550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
552 false);
553 }
554 EXPORT_SYMBOL(ieee80211_wake_queues);
555
556 static unsigned int
557 ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
559 {
560 unsigned int queues;
561
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
563 int ac;
564
565 queues = 0;
566
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
571 } else {
572 /* all queues */
573 queues = BIT(local->hw.queues) - 1;
574 }
575
576 return queues;
577 }
578
579 void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 unsigned int queues, bool drop)
582 {
583 if (!local->ops->flush)
584 return;
585
586 /*
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
589 */
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
592
593 ieee80211_stop_queues_by_reason(&local->hw, queues,
594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
595 false);
596
597 drv_flush(local, sdata, queues, drop);
598
599 ieee80211_wake_queues_by_reason(&local->hw, queues,
600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
601 false);
602 }
603
604 void ieee80211_flush_queues(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata, bool drop)
606 {
607 __ieee80211_flush_queues(local, sdata, 0, drop);
608 }
609
610 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
613 {
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
616 reason, true);
617 }
618
619 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
622 {
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
625 reason, true);
626 }
627
628 static void __iterate_interfaces(struct ieee80211_local *local,
629 u32 iter_flags,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
632 void *data)
633 {
634 struct ieee80211_sub_if_data *sdata;
635 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
636
637 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
638 switch (sdata->vif.type) {
639 case NL80211_IFTYPE_MONITOR:
640 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
641 continue;
642 break;
643 case NL80211_IFTYPE_AP_VLAN:
644 continue;
645 default:
646 break;
647 }
648 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
649 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
650 continue;
651 if (ieee80211_sdata_running(sdata) || !active_only)
652 iterator(data, sdata->vif.addr,
653 &sdata->vif);
654 }
655
656 sdata = rcu_dereference_check(local->monitor_sdata,
657 lockdep_is_held(&local->iflist_mtx) ||
658 lockdep_rtnl_is_held());
659 if (sdata &&
660 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
661 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
662 iterator(data, sdata->vif.addr, &sdata->vif);
663 }
664
665 void ieee80211_iterate_interfaces(
666 struct ieee80211_hw *hw, u32 iter_flags,
667 void (*iterator)(void *data, u8 *mac,
668 struct ieee80211_vif *vif),
669 void *data)
670 {
671 struct ieee80211_local *local = hw_to_local(hw);
672
673 mutex_lock(&local->iflist_mtx);
674 __iterate_interfaces(local, iter_flags, iterator, data);
675 mutex_unlock(&local->iflist_mtx);
676 }
677 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
678
679 void ieee80211_iterate_active_interfaces_atomic(
680 struct ieee80211_hw *hw, u32 iter_flags,
681 void (*iterator)(void *data, u8 *mac,
682 struct ieee80211_vif *vif),
683 void *data)
684 {
685 struct ieee80211_local *local = hw_to_local(hw);
686
687 rcu_read_lock();
688 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
689 iterator, data);
690 rcu_read_unlock();
691 }
692 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
693
694 void ieee80211_iterate_active_interfaces_rtnl(
695 struct ieee80211_hw *hw, u32 iter_flags,
696 void (*iterator)(void *data, u8 *mac,
697 struct ieee80211_vif *vif),
698 void *data)
699 {
700 struct ieee80211_local *local = hw_to_local(hw);
701
702 ASSERT_RTNL();
703
704 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
705 iterator, data);
706 }
707 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
708
709 static void __iterate_stations(struct ieee80211_local *local,
710 void (*iterator)(void *data,
711 struct ieee80211_sta *sta),
712 void *data)
713 {
714 struct sta_info *sta;
715
716 list_for_each_entry_rcu(sta, &local->sta_list, list) {
717 if (!sta->uploaded)
718 continue;
719
720 iterator(data, &sta->sta);
721 }
722 }
723
724 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
725 void (*iterator)(void *data,
726 struct ieee80211_sta *sta),
727 void *data)
728 {
729 struct ieee80211_local *local = hw_to_local(hw);
730
731 rcu_read_lock();
732 __iterate_stations(local, iterator, data);
733 rcu_read_unlock();
734 }
735 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
736
737 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
738 {
739 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
740
741 if (!ieee80211_sdata_running(sdata) ||
742 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
743 return NULL;
744 return &sdata->vif;
745 }
746 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
747
748 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
749 {
750 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
751
752 if (!ieee80211_sdata_running(sdata) ||
753 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
754 return NULL;
755
756 return &sdata->wdev;
757 }
758 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
759
760 /*
761 * Nothing should have been stuffed into the workqueue during
762 * the suspend->resume cycle. Since we can't check each caller
763 * of this function if we are already quiescing / suspended,
764 * check here and don't WARN since this can actually happen when
765 * the rx path (for example) is racing against __ieee80211_suspend
766 * and suspending / quiescing was set after the rx path checked
767 * them.
768 */
769 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
770 {
771 if (local->quiescing || (local->suspended && !local->resuming)) {
772 pr_warn("queueing ieee80211 work while going to suspend\n");
773 return false;
774 }
775
776 return true;
777 }
778
779 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
780 {
781 struct ieee80211_local *local = hw_to_local(hw);
782
783 if (!ieee80211_can_queue_work(local))
784 return;
785
786 queue_work(local->workqueue, work);
787 }
788 EXPORT_SYMBOL(ieee80211_queue_work);
789
790 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
791 struct delayed_work *dwork,
792 unsigned long delay)
793 {
794 struct ieee80211_local *local = hw_to_local(hw);
795
796 if (!ieee80211_can_queue_work(local))
797 return;
798
799 queue_delayed_work(local->workqueue, dwork, delay);
800 }
801 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
802
803 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
804 struct ieee802_11_elems *elems,
805 u64 filter, u32 crc)
806 {
807 size_t left = len;
808 const u8 *pos = start;
809 bool calc_crc = filter != 0;
810 DECLARE_BITMAP(seen_elems, 256);
811 const u8 *ie;
812
813 bitmap_zero(seen_elems, 256);
814 memset(elems, 0, sizeof(*elems));
815 elems->ie_start = start;
816 elems->total_len = len;
817
818 while (left >= 2) {
819 u8 id, elen;
820 bool elem_parse_failed;
821
822 id = *pos++;
823 elen = *pos++;
824 left -= 2;
825
826 if (elen > left) {
827 elems->parse_error = true;
828 break;
829 }
830
831 switch (id) {
832 case WLAN_EID_SSID:
833 case WLAN_EID_SUPP_RATES:
834 case WLAN_EID_FH_PARAMS:
835 case WLAN_EID_DS_PARAMS:
836 case WLAN_EID_CF_PARAMS:
837 case WLAN_EID_TIM:
838 case WLAN_EID_IBSS_PARAMS:
839 case WLAN_EID_CHALLENGE:
840 case WLAN_EID_RSN:
841 case WLAN_EID_ERP_INFO:
842 case WLAN_EID_EXT_SUPP_RATES:
843 case WLAN_EID_HT_CAPABILITY:
844 case WLAN_EID_HT_OPERATION:
845 case WLAN_EID_VHT_CAPABILITY:
846 case WLAN_EID_VHT_OPERATION:
847 case WLAN_EID_MESH_ID:
848 case WLAN_EID_MESH_CONFIG:
849 case WLAN_EID_PEER_MGMT:
850 case WLAN_EID_PREQ:
851 case WLAN_EID_PREP:
852 case WLAN_EID_PERR:
853 case WLAN_EID_RANN:
854 case WLAN_EID_CHANNEL_SWITCH:
855 case WLAN_EID_EXT_CHANSWITCH_ANN:
856 case WLAN_EID_COUNTRY:
857 case WLAN_EID_PWR_CONSTRAINT:
858 case WLAN_EID_TIMEOUT_INTERVAL:
859 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
860 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
861 case WLAN_EID_CHAN_SWITCH_PARAM:
862 case WLAN_EID_EXT_CAPABILITY:
863 case WLAN_EID_CHAN_SWITCH_TIMING:
864 case WLAN_EID_LINK_ID:
865 /*
866 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
867 * that if the content gets bigger it might be needed more than once
868 */
869 if (test_bit(id, seen_elems)) {
870 elems->parse_error = true;
871 left -= elen;
872 pos += elen;
873 continue;
874 }
875 break;
876 }
877
878 if (calc_crc && id < 64 && (filter & (1ULL << id)))
879 crc = crc32_be(crc, pos - 2, elen + 2);
880
881 elem_parse_failed = false;
882
883 switch (id) {
884 case WLAN_EID_LINK_ID:
885 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
886 elem_parse_failed = true;
887 break;
888 }
889 elems->lnk_id = (void *)(pos - 2);
890 break;
891 case WLAN_EID_CHAN_SWITCH_TIMING:
892 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
893 elem_parse_failed = true;
894 break;
895 }
896 elems->ch_sw_timing = (void *)pos;
897 break;
898 case WLAN_EID_EXT_CAPABILITY:
899 elems->ext_capab = pos;
900 elems->ext_capab_len = elen;
901 break;
902 case WLAN_EID_SSID:
903 elems->ssid = pos;
904 elems->ssid_len = elen;
905 break;
906 case WLAN_EID_SUPP_RATES:
907 elems->supp_rates = pos;
908 elems->supp_rates_len = elen;
909 break;
910 case WLAN_EID_DS_PARAMS:
911 if (elen >= 1)
912 elems->ds_params = pos;
913 else
914 elem_parse_failed = true;
915 break;
916 case WLAN_EID_TIM:
917 if (elen >= sizeof(struct ieee80211_tim_ie)) {
918 elems->tim = (void *)pos;
919 elems->tim_len = elen;
920 } else
921 elem_parse_failed = true;
922 break;
923 case WLAN_EID_CHALLENGE:
924 elems->challenge = pos;
925 elems->challenge_len = elen;
926 break;
927 case WLAN_EID_VENDOR_SPECIFIC:
928 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
929 pos[2] == 0xf2) {
930 /* Microsoft OUI (00:50:F2) */
931
932 if (calc_crc)
933 crc = crc32_be(crc, pos - 2, elen + 2);
934
935 if (elen >= 5 && pos[3] == 2) {
936 /* OUI Type 2 - WMM IE */
937 if (pos[4] == 0) {
938 elems->wmm_info = pos;
939 elems->wmm_info_len = elen;
940 } else if (pos[4] == 1) {
941 elems->wmm_param = pos;
942 elems->wmm_param_len = elen;
943 }
944 }
945 }
946 break;
947 case WLAN_EID_RSN:
948 elems->rsn = pos;
949 elems->rsn_len = elen;
950 break;
951 case WLAN_EID_ERP_INFO:
952 if (elen >= 1)
953 elems->erp_info = pos;
954 else
955 elem_parse_failed = true;
956 break;
957 case WLAN_EID_EXT_SUPP_RATES:
958 elems->ext_supp_rates = pos;
959 elems->ext_supp_rates_len = elen;
960 break;
961 case WLAN_EID_HT_CAPABILITY:
962 if (elen >= sizeof(struct ieee80211_ht_cap))
963 elems->ht_cap_elem = (void *)pos;
964 else
965 elem_parse_failed = true;
966 break;
967 case WLAN_EID_HT_OPERATION:
968 if (elen >= sizeof(struct ieee80211_ht_operation))
969 elems->ht_operation = (void *)pos;
970 else
971 elem_parse_failed = true;
972 break;
973 case WLAN_EID_VHT_CAPABILITY:
974 if (elen >= sizeof(struct ieee80211_vht_cap))
975 elems->vht_cap_elem = (void *)pos;
976 else
977 elem_parse_failed = true;
978 break;
979 case WLAN_EID_VHT_OPERATION:
980 if (elen >= sizeof(struct ieee80211_vht_operation))
981 elems->vht_operation = (void *)pos;
982 else
983 elem_parse_failed = true;
984 break;
985 case WLAN_EID_OPMODE_NOTIF:
986 if (elen > 0)
987 elems->opmode_notif = pos;
988 else
989 elem_parse_failed = true;
990 break;
991 case WLAN_EID_MESH_ID:
992 elems->mesh_id = pos;
993 elems->mesh_id_len = elen;
994 break;
995 case WLAN_EID_MESH_CONFIG:
996 if (elen >= sizeof(struct ieee80211_meshconf_ie))
997 elems->mesh_config = (void *)pos;
998 else
999 elem_parse_failed = true;
1000 break;
1001 case WLAN_EID_PEER_MGMT:
1002 elems->peering = pos;
1003 elems->peering_len = elen;
1004 break;
1005 case WLAN_EID_MESH_AWAKE_WINDOW:
1006 if (elen >= 2)
1007 elems->awake_window = (void *)pos;
1008 break;
1009 case WLAN_EID_PREQ:
1010 elems->preq = pos;
1011 elems->preq_len = elen;
1012 break;
1013 case WLAN_EID_PREP:
1014 elems->prep = pos;
1015 elems->prep_len = elen;
1016 break;
1017 case WLAN_EID_PERR:
1018 elems->perr = pos;
1019 elems->perr_len = elen;
1020 break;
1021 case WLAN_EID_RANN:
1022 if (elen >= sizeof(struct ieee80211_rann_ie))
1023 elems->rann = (void *)pos;
1024 else
1025 elem_parse_failed = true;
1026 break;
1027 case WLAN_EID_CHANNEL_SWITCH:
1028 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1029 elem_parse_failed = true;
1030 break;
1031 }
1032 elems->ch_switch_ie = (void *)pos;
1033 break;
1034 case WLAN_EID_EXT_CHANSWITCH_ANN:
1035 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1036 elem_parse_failed = true;
1037 break;
1038 }
1039 elems->ext_chansw_ie = (void *)pos;
1040 break;
1041 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1042 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1043 elem_parse_failed = true;
1044 break;
1045 }
1046 elems->sec_chan_offs = (void *)pos;
1047 break;
1048 case WLAN_EID_CHAN_SWITCH_PARAM:
1049 if (elen !=
1050 sizeof(*elems->mesh_chansw_params_ie)) {
1051 elem_parse_failed = true;
1052 break;
1053 }
1054 elems->mesh_chansw_params_ie = (void *)pos;
1055 break;
1056 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1057 if (!action ||
1058 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1059 elem_parse_failed = true;
1060 break;
1061 }
1062 elems->wide_bw_chansw_ie = (void *)pos;
1063 break;
1064 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1065 if (action) {
1066 elem_parse_failed = true;
1067 break;
1068 }
1069 /*
1070 * This is a bit tricky, but as we only care about
1071 * the wide bandwidth channel switch element, so
1072 * just parse it out manually.
1073 */
1074 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1075 pos, elen);
1076 if (ie) {
1077 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1078 elems->wide_bw_chansw_ie =
1079 (void *)(ie + 2);
1080 else
1081 elem_parse_failed = true;
1082 }
1083 break;
1084 case WLAN_EID_COUNTRY:
1085 elems->country_elem = pos;
1086 elems->country_elem_len = elen;
1087 break;
1088 case WLAN_EID_PWR_CONSTRAINT:
1089 if (elen != 1) {
1090 elem_parse_failed = true;
1091 break;
1092 }
1093 elems->pwr_constr_elem = pos;
1094 break;
1095 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1096 /* Lots of different options exist, but we only care
1097 * about the Dynamic Transmit Power Control element.
1098 * First check for the Cisco OUI, then for the DTPC
1099 * tag (0x00).
1100 */
1101 if (elen < 4) {
1102 elem_parse_failed = true;
1103 break;
1104 }
1105
1106 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1107 pos[2] != 0x96 || pos[3] != 0x00)
1108 break;
1109
1110 if (elen != 6) {
1111 elem_parse_failed = true;
1112 break;
1113 }
1114
1115 if (calc_crc)
1116 crc = crc32_be(crc, pos - 2, elen + 2);
1117
1118 elems->cisco_dtpc_elem = pos;
1119 break;
1120 case WLAN_EID_TIMEOUT_INTERVAL:
1121 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1122 elems->timeout_int = (void *)pos;
1123 else
1124 elem_parse_failed = true;
1125 break;
1126 default:
1127 break;
1128 }
1129
1130 if (elem_parse_failed)
1131 elems->parse_error = true;
1132 else
1133 __set_bit(id, seen_elems);
1134
1135 left -= elen;
1136 pos += elen;
1137 }
1138
1139 if (left != 0)
1140 elems->parse_error = true;
1141
1142 return crc;
1143 }
1144
1145 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1146 bool bss_notify)
1147 {
1148 struct ieee80211_local *local = sdata->local;
1149 struct ieee80211_tx_queue_params qparam;
1150 struct ieee80211_chanctx_conf *chanctx_conf;
1151 int ac;
1152 bool use_11b, enable_qos;
1153 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1154 int aCWmin, aCWmax;
1155
1156 if (!local->ops->conf_tx)
1157 return;
1158
1159 if (local->hw.queues < IEEE80211_NUM_ACS)
1160 return;
1161
1162 memset(&qparam, 0, sizeof(qparam));
1163
1164 rcu_read_lock();
1165 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1166 use_11b = (chanctx_conf &&
1167 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1168 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1169 rcu_read_unlock();
1170
1171 /*
1172 * By default disable QoS in STA mode for old access points, which do
1173 * not support 802.11e. New APs will provide proper queue parameters,
1174 * that we will configure later.
1175 */
1176 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1177
1178 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1179
1180 /* Set defaults according to 802.11-2007 Table 7-37 */
1181 aCWmax = 1023;
1182 if (use_11b)
1183 aCWmin = 31;
1184 else
1185 aCWmin = 15;
1186
1187 /* Confiure old 802.11b/g medium access rules. */
1188 qparam.cw_max = aCWmax;
1189 qparam.cw_min = aCWmin;
1190 qparam.txop = 0;
1191 qparam.aifs = 2;
1192
1193 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1194 /* Update if QoS is enabled. */
1195 if (enable_qos) {
1196 switch (ac) {
1197 case IEEE80211_AC_BK:
1198 qparam.cw_max = aCWmax;
1199 qparam.cw_min = aCWmin;
1200 qparam.txop = 0;
1201 if (is_ocb)
1202 qparam.aifs = 9;
1203 else
1204 qparam.aifs = 7;
1205 break;
1206 /* never happens but let's not leave undefined */
1207 default:
1208 case IEEE80211_AC_BE:
1209 qparam.cw_max = aCWmax;
1210 qparam.cw_min = aCWmin;
1211 qparam.txop = 0;
1212 if (is_ocb)
1213 qparam.aifs = 6;
1214 else
1215 qparam.aifs = 3;
1216 break;
1217 case IEEE80211_AC_VI:
1218 qparam.cw_max = aCWmin;
1219 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1220 if (is_ocb)
1221 qparam.txop = 0;
1222 else if (use_11b)
1223 qparam.txop = 6016/32;
1224 else
1225 qparam.txop = 3008/32;
1226
1227 if (is_ocb)
1228 qparam.aifs = 3;
1229 else
1230 qparam.aifs = 2;
1231 break;
1232 case IEEE80211_AC_VO:
1233 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1234 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1235 if (is_ocb)
1236 qparam.txop = 0;
1237 else if (use_11b)
1238 qparam.txop = 3264/32;
1239 else
1240 qparam.txop = 1504/32;
1241 qparam.aifs = 2;
1242 break;
1243 }
1244 }
1245
1246 qparam.uapsd = false;
1247
1248 sdata->tx_conf[ac] = qparam;
1249 drv_conf_tx(local, sdata, ac, &qparam);
1250 }
1251
1252 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1253 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1254 sdata->vif.bss_conf.qos = enable_qos;
1255 if (bss_notify)
1256 ieee80211_bss_info_change_notify(sdata,
1257 BSS_CHANGED_QOS);
1258 }
1259 }
1260
1261 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1262 u16 transaction, u16 auth_alg, u16 status,
1263 const u8 *extra, size_t extra_len, const u8 *da,
1264 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1265 u32 tx_flags)
1266 {
1267 struct ieee80211_local *local = sdata->local;
1268 struct sk_buff *skb;
1269 struct ieee80211_mgmt *mgmt;
1270 int err;
1271
1272 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1273 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1274 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1275 if (!skb)
1276 return;
1277
1278 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1279
1280 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1281 memset(mgmt, 0, 24 + 6);
1282 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1283 IEEE80211_STYPE_AUTH);
1284 memcpy(mgmt->da, da, ETH_ALEN);
1285 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1286 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1287 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1288 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1289 mgmt->u.auth.status_code = cpu_to_le16(status);
1290 if (extra)
1291 memcpy(skb_put(skb, extra_len), extra, extra_len);
1292
1293 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1294 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1295 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1296 WARN_ON(err);
1297 }
1298
1299 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1300 tx_flags;
1301 ieee80211_tx_skb(sdata, skb);
1302 }
1303
1304 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1305 const u8 *bssid, u16 stype, u16 reason,
1306 bool send_frame, u8 *frame_buf)
1307 {
1308 struct ieee80211_local *local = sdata->local;
1309 struct sk_buff *skb;
1310 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1311
1312 /* build frame */
1313 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1314 mgmt->duration = 0; /* initialize only */
1315 mgmt->seq_ctrl = 0; /* initialize only */
1316 memcpy(mgmt->da, bssid, ETH_ALEN);
1317 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1318 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1319 /* u.deauth.reason_code == u.disassoc.reason_code */
1320 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1321
1322 if (send_frame) {
1323 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1324 IEEE80211_DEAUTH_FRAME_LEN);
1325 if (!skb)
1326 return;
1327
1328 skb_reserve(skb, local->hw.extra_tx_headroom);
1329
1330 /* copy in frame */
1331 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1332 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1333
1334 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1335 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1336 IEEE80211_SKB_CB(skb)->flags |=
1337 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1338
1339 ieee80211_tx_skb(sdata, skb);
1340 }
1341 }
1342
1343 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1344 u8 *buffer, size_t buffer_len,
1345 const u8 *ie, size_t ie_len,
1346 enum ieee80211_band band,
1347 u32 rate_mask,
1348 struct cfg80211_chan_def *chandef,
1349 size_t *offset)
1350 {
1351 struct ieee80211_supported_band *sband;
1352 u8 *pos = buffer, *end = buffer + buffer_len;
1353 size_t noffset;
1354 int supp_rates_len, i;
1355 u8 rates[32];
1356 int num_rates;
1357 int ext_rates_len;
1358 int shift;
1359 u32 rate_flags;
1360 bool have_80mhz = false;
1361
1362 *offset = 0;
1363
1364 sband = local->hw.wiphy->bands[band];
1365 if (WARN_ON_ONCE(!sband))
1366 return 0;
1367
1368 rate_flags = ieee80211_chandef_rate_flags(chandef);
1369 shift = ieee80211_chandef_get_shift(chandef);
1370
1371 num_rates = 0;
1372 for (i = 0; i < sband->n_bitrates; i++) {
1373 if ((BIT(i) & rate_mask) == 0)
1374 continue; /* skip rate */
1375 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1376 continue;
1377
1378 rates[num_rates++] =
1379 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1380 (1 << shift) * 5);
1381 }
1382
1383 supp_rates_len = min_t(int, num_rates, 8);
1384
1385 if (end - pos < 2 + supp_rates_len)
1386 goto out_err;
1387 *pos++ = WLAN_EID_SUPP_RATES;
1388 *pos++ = supp_rates_len;
1389 memcpy(pos, rates, supp_rates_len);
1390 pos += supp_rates_len;
1391
1392 /* insert "request information" if in custom IEs */
1393 if (ie && ie_len) {
1394 static const u8 before_extrates[] = {
1395 WLAN_EID_SSID,
1396 WLAN_EID_SUPP_RATES,
1397 WLAN_EID_REQUEST,
1398 };
1399 noffset = ieee80211_ie_split(ie, ie_len,
1400 before_extrates,
1401 ARRAY_SIZE(before_extrates),
1402 *offset);
1403 if (end - pos < noffset - *offset)
1404 goto out_err;
1405 memcpy(pos, ie + *offset, noffset - *offset);
1406 pos += noffset - *offset;
1407 *offset = noffset;
1408 }
1409
1410 ext_rates_len = num_rates - supp_rates_len;
1411 if (ext_rates_len > 0) {
1412 if (end - pos < 2 + ext_rates_len)
1413 goto out_err;
1414 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1415 *pos++ = ext_rates_len;
1416 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1417 pos += ext_rates_len;
1418 }
1419
1420 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1421 if (end - pos < 3)
1422 goto out_err;
1423 *pos++ = WLAN_EID_DS_PARAMS;
1424 *pos++ = 1;
1425 *pos++ = ieee80211_frequency_to_channel(
1426 chandef->chan->center_freq);
1427 }
1428
1429 /* insert custom IEs that go before HT */
1430 if (ie && ie_len) {
1431 static const u8 before_ht[] = {
1432 WLAN_EID_SSID,
1433 WLAN_EID_SUPP_RATES,
1434 WLAN_EID_REQUEST,
1435 WLAN_EID_EXT_SUPP_RATES,
1436 WLAN_EID_DS_PARAMS,
1437 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1438 };
1439 noffset = ieee80211_ie_split(ie, ie_len,
1440 before_ht, ARRAY_SIZE(before_ht),
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 if (sband->ht_cap.ht_supported) {
1450 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1451 goto out_err;
1452 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1453 sband->ht_cap.cap);
1454 }
1455
1456 /*
1457 * If adding more here, adjust code in main.c
1458 * that calculates local->scan_ies_len.
1459 */
1460
1461 /* insert custom IEs that go before VHT */
1462 if (ie && ie_len) {
1463 static const u8 before_vht[] = {
1464 WLAN_EID_SSID,
1465 WLAN_EID_SUPP_RATES,
1466 WLAN_EID_REQUEST,
1467 WLAN_EID_EXT_SUPP_RATES,
1468 WLAN_EID_DS_PARAMS,
1469 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1470 WLAN_EID_HT_CAPABILITY,
1471 WLAN_EID_BSS_COEX_2040,
1472 WLAN_EID_EXT_CAPABILITY,
1473 WLAN_EID_SSID_LIST,
1474 WLAN_EID_CHANNEL_USAGE,
1475 WLAN_EID_INTERWORKING,
1476 /* mesh ID can't happen here */
1477 /* 60 GHz can't happen here right now */
1478 };
1479 noffset = ieee80211_ie_split(ie, ie_len,
1480 before_vht, ARRAY_SIZE(before_vht),
1481 *offset);
1482 if (end - pos < noffset - *offset)
1483 goto out_err;
1484 memcpy(pos, ie + *offset, noffset - *offset);
1485 pos += noffset - *offset;
1486 *offset = noffset;
1487 }
1488
1489 /* Check if any channel in this sband supports at least 80 MHz */
1490 for (i = 0; i < sband->n_channels; i++) {
1491 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1492 IEEE80211_CHAN_NO_80MHZ))
1493 continue;
1494
1495 have_80mhz = true;
1496 break;
1497 }
1498
1499 if (sband->vht_cap.vht_supported && have_80mhz) {
1500 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1501 goto out_err;
1502 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1503 sband->vht_cap.cap);
1504 }
1505
1506 return pos - buffer;
1507 out_err:
1508 WARN_ONCE(1, "not enough space for preq IEs\n");
1509 return pos - buffer;
1510 }
1511
1512 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1513 size_t buffer_len,
1514 struct ieee80211_scan_ies *ie_desc,
1515 const u8 *ie, size_t ie_len,
1516 u8 bands_used, u32 *rate_masks,
1517 struct cfg80211_chan_def *chandef)
1518 {
1519 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1520 int i;
1521
1522 memset(ie_desc, 0, sizeof(*ie_desc));
1523
1524 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1525 if (bands_used & BIT(i)) {
1526 pos += ieee80211_build_preq_ies_band(local,
1527 buffer + pos,
1528 buffer_len - pos,
1529 ie, ie_len, i,
1530 rate_masks[i],
1531 chandef,
1532 &custom_ie_offset);
1533 ie_desc->ies[i] = buffer + old_pos;
1534 ie_desc->len[i] = pos - old_pos;
1535 old_pos = pos;
1536 }
1537 }
1538
1539 /* add any remaining custom IEs */
1540 if (ie && ie_len) {
1541 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1542 "not enough space for preq custom IEs\n"))
1543 return pos;
1544 memcpy(buffer + pos, ie + custom_ie_offset,
1545 ie_len - custom_ie_offset);
1546 ie_desc->common_ies = buffer + pos;
1547 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1548 pos += ie_len - custom_ie_offset;
1549 }
1550
1551 return pos;
1552 };
1553
1554 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1555 const u8 *src, const u8 *dst,
1556 u32 ratemask,
1557 struct ieee80211_channel *chan,
1558 const u8 *ssid, size_t ssid_len,
1559 const u8 *ie, size_t ie_len,
1560 bool directed)
1561 {
1562 struct ieee80211_local *local = sdata->local;
1563 struct cfg80211_chan_def chandef;
1564 struct sk_buff *skb;
1565 struct ieee80211_mgmt *mgmt;
1566 int ies_len;
1567 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1568 struct ieee80211_scan_ies dummy_ie_desc;
1569
1570 /*
1571 * Do not send DS Channel parameter for directed probe requests
1572 * in order to maximize the chance that we get a response. Some
1573 * badly-behaved APs don't respond when this parameter is included.
1574 */
1575 chandef.width = sdata->vif.bss_conf.chandef.width;
1576 if (directed)
1577 chandef.chan = NULL;
1578 else
1579 chandef.chan = chan;
1580
1581 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1582 100 + ie_len);
1583 if (!skb)
1584 return NULL;
1585
1586 rate_masks[chan->band] = ratemask;
1587 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1588 skb_tailroom(skb), &dummy_ie_desc,
1589 ie, ie_len, BIT(chan->band),
1590 rate_masks, &chandef);
1591 skb_put(skb, ies_len);
1592
1593 if (dst) {
1594 mgmt = (struct ieee80211_mgmt *) skb->data;
1595 memcpy(mgmt->da, dst, ETH_ALEN);
1596 memcpy(mgmt->bssid, dst, ETH_ALEN);
1597 }
1598
1599 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1600
1601 return skb;
1602 }
1603
1604 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1605 const u8 *src, const u8 *dst,
1606 const u8 *ssid, size_t ssid_len,
1607 const u8 *ie, size_t ie_len,
1608 u32 ratemask, bool directed, u32 tx_flags,
1609 struct ieee80211_channel *channel, bool scan)
1610 {
1611 struct sk_buff *skb;
1612
1613 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1614 ssid, ssid_len,
1615 ie, ie_len, directed);
1616 if (skb) {
1617 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1618 if (scan)
1619 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1620 else
1621 ieee80211_tx_skb(sdata, skb);
1622 }
1623 }
1624
1625 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1626 struct ieee802_11_elems *elems,
1627 enum ieee80211_band band, u32 *basic_rates)
1628 {
1629 struct ieee80211_supported_band *sband;
1630 size_t num_rates;
1631 u32 supp_rates, rate_flags;
1632 int i, j, shift;
1633 sband = sdata->local->hw.wiphy->bands[band];
1634
1635 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1636 shift = ieee80211_vif_get_shift(&sdata->vif);
1637
1638 if (WARN_ON(!sband))
1639 return 1;
1640
1641 num_rates = sband->n_bitrates;
1642 supp_rates = 0;
1643 for (i = 0; i < elems->supp_rates_len +
1644 elems->ext_supp_rates_len; i++) {
1645 u8 rate = 0;
1646 int own_rate;
1647 bool is_basic;
1648 if (i < elems->supp_rates_len)
1649 rate = elems->supp_rates[i];
1650 else if (elems->ext_supp_rates)
1651 rate = elems->ext_supp_rates
1652 [i - elems->supp_rates_len];
1653 own_rate = 5 * (rate & 0x7f);
1654 is_basic = !!(rate & 0x80);
1655
1656 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1657 continue;
1658
1659 for (j = 0; j < num_rates; j++) {
1660 int brate;
1661 if ((rate_flags & sband->bitrates[j].flags)
1662 != rate_flags)
1663 continue;
1664
1665 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1666 1 << shift);
1667
1668 if (brate == own_rate) {
1669 supp_rates |= BIT(j);
1670 if (basic_rates && is_basic)
1671 *basic_rates |= BIT(j);
1672 }
1673 }
1674 }
1675 return supp_rates;
1676 }
1677
1678 void ieee80211_stop_device(struct ieee80211_local *local)
1679 {
1680 ieee80211_led_radio(local, false);
1681 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1682
1683 cancel_work_sync(&local->reconfig_filter);
1684
1685 flush_workqueue(local->workqueue);
1686 drv_stop(local);
1687 }
1688
1689 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1690 {
1691 struct ieee80211_sub_if_data *sdata;
1692 struct ieee80211_chanctx *ctx;
1693
1694 /*
1695 * We get here if during resume the device can't be restarted properly.
1696 * We might also get here if this happens during HW reset, which is a
1697 * slightly different situation and we need to drop all connections in
1698 * the latter case.
1699 *
1700 * Ask cfg80211 to turn off all interfaces, this will result in more
1701 * warnings but at least we'll then get into a clean stopped state.
1702 */
1703
1704 local->resuming = false;
1705 local->suspended = false;
1706 local->started = false;
1707
1708 /* scheduled scan clearly can't be running any more, but tell
1709 * cfg80211 and clear local state
1710 */
1711 ieee80211_sched_scan_end(local);
1712
1713 list_for_each_entry(sdata, &local->interfaces, list)
1714 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1715
1716 /* Mark channel contexts as not being in the driver any more to avoid
1717 * removing them from the driver during the shutdown process...
1718 */
1719 mutex_lock(&local->chanctx_mtx);
1720 list_for_each_entry(ctx, &local->chanctx_list, list)
1721 ctx->driver_present = false;
1722 mutex_unlock(&local->chanctx_mtx);
1723
1724 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1725 }
1726
1727 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1728 struct ieee80211_sub_if_data *sdata)
1729 {
1730 struct ieee80211_chanctx_conf *conf;
1731 struct ieee80211_chanctx *ctx;
1732
1733 if (!local->use_chanctx)
1734 return;
1735
1736 mutex_lock(&local->chanctx_mtx);
1737 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1738 lockdep_is_held(&local->chanctx_mtx));
1739 if (conf) {
1740 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1741 drv_assign_vif_chanctx(local, sdata, ctx);
1742 }
1743 mutex_unlock(&local->chanctx_mtx);
1744 }
1745
1746 int ieee80211_reconfig(struct ieee80211_local *local)
1747 {
1748 struct ieee80211_hw *hw = &local->hw;
1749 struct ieee80211_sub_if_data *sdata;
1750 struct ieee80211_chanctx *ctx;
1751 struct sta_info *sta;
1752 int res, i;
1753 bool reconfig_due_to_wowlan = false;
1754 struct ieee80211_sub_if_data *sched_scan_sdata;
1755 struct cfg80211_sched_scan_request *sched_scan_req;
1756 bool sched_scan_stopped = false;
1757
1758 /* nothing to do if HW shouldn't run */
1759 if (!local->open_count)
1760 goto wake_up;
1761
1762 #ifdef CONFIG_PM
1763 if (local->suspended)
1764 local->resuming = true;
1765
1766 if (local->wowlan) {
1767 res = drv_resume(local);
1768 local->wowlan = false;
1769 if (res < 0) {
1770 local->resuming = false;
1771 return res;
1772 }
1773 if (res == 0)
1774 goto wake_up;
1775 WARN_ON(res > 1);
1776 /*
1777 * res is 1, which means the driver requested
1778 * to go through a regular reset on wakeup.
1779 */
1780 reconfig_due_to_wowlan = true;
1781 }
1782 #endif
1783
1784 /*
1785 * Upon resume hardware can sometimes be goofy due to
1786 * various platform / driver / bus issues, so restarting
1787 * the device may at times not work immediately. Propagate
1788 * the error.
1789 */
1790 res = drv_start(local);
1791 if (res) {
1792 if (local->suspended)
1793 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1794 else
1795 WARN(1, "Hardware became unavailable during restart.\n");
1796 ieee80211_handle_reconfig_failure(local);
1797 return res;
1798 }
1799
1800 /* setup fragmentation threshold */
1801 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1802
1803 /* setup RTS threshold */
1804 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1805
1806 /* reset coverage class */
1807 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1808
1809 ieee80211_led_radio(local, true);
1810 ieee80211_mod_tpt_led_trig(local,
1811 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1812
1813 /* add interfaces */
1814 sdata = rtnl_dereference(local->monitor_sdata);
1815 if (sdata) {
1816 /* in HW restart it exists already */
1817 WARN_ON(local->resuming);
1818 res = drv_add_interface(local, sdata);
1819 if (WARN_ON(res)) {
1820 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1821 synchronize_net();
1822 kfree(sdata);
1823 }
1824 }
1825
1826 list_for_each_entry(sdata, &local->interfaces, list) {
1827 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1828 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1829 ieee80211_sdata_running(sdata)) {
1830 res = drv_add_interface(local, sdata);
1831 if (WARN_ON(res))
1832 break;
1833 }
1834 }
1835
1836 /* If adding any of the interfaces failed above, roll back and
1837 * report failure.
1838 */
1839 if (res) {
1840 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1841 list)
1842 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1843 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1844 ieee80211_sdata_running(sdata))
1845 drv_remove_interface(local, sdata);
1846 ieee80211_handle_reconfig_failure(local);
1847 return res;
1848 }
1849
1850 /* add channel contexts */
1851 if (local->use_chanctx) {
1852 mutex_lock(&local->chanctx_mtx);
1853 list_for_each_entry(ctx, &local->chanctx_list, list)
1854 if (ctx->replace_state !=
1855 IEEE80211_CHANCTX_REPLACES_OTHER)
1856 WARN_ON(drv_add_chanctx(local, ctx));
1857 mutex_unlock(&local->chanctx_mtx);
1858
1859 list_for_each_entry(sdata, &local->interfaces, list) {
1860 if (!ieee80211_sdata_running(sdata))
1861 continue;
1862 ieee80211_assign_chanctx(local, sdata);
1863 }
1864
1865 sdata = rtnl_dereference(local->monitor_sdata);
1866 if (sdata && ieee80211_sdata_running(sdata))
1867 ieee80211_assign_chanctx(local, sdata);
1868 }
1869
1870 /* add STAs back */
1871 mutex_lock(&local->sta_mtx);
1872 list_for_each_entry(sta, &local->sta_list, list) {
1873 enum ieee80211_sta_state state;
1874
1875 if (!sta->uploaded)
1876 continue;
1877
1878 /* AP-mode stations will be added later */
1879 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1880 continue;
1881
1882 for (state = IEEE80211_STA_NOTEXIST;
1883 state < sta->sta_state; state++)
1884 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1885 state + 1));
1886 }
1887 mutex_unlock(&local->sta_mtx);
1888
1889 /* reconfigure tx conf */
1890 if (hw->queues >= IEEE80211_NUM_ACS) {
1891 list_for_each_entry(sdata, &local->interfaces, list) {
1892 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1893 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1894 !ieee80211_sdata_running(sdata))
1895 continue;
1896
1897 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1898 drv_conf_tx(local, sdata, i,
1899 &sdata->tx_conf[i]);
1900 }
1901 }
1902
1903 /* reconfigure hardware */
1904 ieee80211_hw_config(local, ~0);
1905
1906 ieee80211_configure_filter(local);
1907
1908 /* Finally also reconfigure all the BSS information */
1909 list_for_each_entry(sdata, &local->interfaces, list) {
1910 u32 changed;
1911
1912 if (!ieee80211_sdata_running(sdata))
1913 continue;
1914
1915 /* common change flags for all interface types */
1916 changed = BSS_CHANGED_ERP_CTS_PROT |
1917 BSS_CHANGED_ERP_PREAMBLE |
1918 BSS_CHANGED_ERP_SLOT |
1919 BSS_CHANGED_HT |
1920 BSS_CHANGED_BASIC_RATES |
1921 BSS_CHANGED_BEACON_INT |
1922 BSS_CHANGED_BSSID |
1923 BSS_CHANGED_CQM |
1924 BSS_CHANGED_QOS |
1925 BSS_CHANGED_IDLE |
1926 BSS_CHANGED_TXPOWER;
1927
1928 switch (sdata->vif.type) {
1929 case NL80211_IFTYPE_STATION:
1930 changed |= BSS_CHANGED_ASSOC |
1931 BSS_CHANGED_ARP_FILTER |
1932 BSS_CHANGED_PS;
1933
1934 /* Re-send beacon info report to the driver */
1935 if (sdata->u.mgd.have_beacon)
1936 changed |= BSS_CHANGED_BEACON_INFO;
1937
1938 sdata_lock(sdata);
1939 ieee80211_bss_info_change_notify(sdata, changed);
1940 sdata_unlock(sdata);
1941 break;
1942 case NL80211_IFTYPE_OCB:
1943 changed |= BSS_CHANGED_OCB;
1944 ieee80211_bss_info_change_notify(sdata, changed);
1945 break;
1946 case NL80211_IFTYPE_ADHOC:
1947 changed |= BSS_CHANGED_IBSS;
1948 /* fall through */
1949 case NL80211_IFTYPE_AP:
1950 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1951
1952 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1953 changed |= BSS_CHANGED_AP_PROBE_RESP;
1954
1955 if (rcu_access_pointer(sdata->u.ap.beacon))
1956 drv_start_ap(local, sdata);
1957 }
1958
1959 /* fall through */
1960 case NL80211_IFTYPE_MESH_POINT:
1961 if (sdata->vif.bss_conf.enable_beacon) {
1962 changed |= BSS_CHANGED_BEACON |
1963 BSS_CHANGED_BEACON_ENABLED;
1964 ieee80211_bss_info_change_notify(sdata, changed);
1965 }
1966 break;
1967 case NL80211_IFTYPE_WDS:
1968 case NL80211_IFTYPE_AP_VLAN:
1969 case NL80211_IFTYPE_MONITOR:
1970 case NL80211_IFTYPE_P2P_DEVICE:
1971 /* nothing to do */
1972 break;
1973 case NL80211_IFTYPE_UNSPECIFIED:
1974 case NUM_NL80211_IFTYPES:
1975 case NL80211_IFTYPE_P2P_CLIENT:
1976 case NL80211_IFTYPE_P2P_GO:
1977 WARN_ON(1);
1978 break;
1979 }
1980 }
1981
1982 ieee80211_recalc_ps(local, -1);
1983
1984 /*
1985 * The sta might be in psm against the ap (e.g. because
1986 * this was the state before a hw restart), so we
1987 * explicitly send a null packet in order to make sure
1988 * it'll sync against the ap (and get out of psm).
1989 */
1990 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1991 list_for_each_entry(sdata, &local->interfaces, list) {
1992 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1993 continue;
1994 if (!sdata->u.mgd.associated)
1995 continue;
1996
1997 ieee80211_send_nullfunc(local, sdata, 0);
1998 }
1999 }
2000
2001 /* APs are now beaconing, add back stations */
2002 mutex_lock(&local->sta_mtx);
2003 list_for_each_entry(sta, &local->sta_list, list) {
2004 enum ieee80211_sta_state state;
2005
2006 if (!sta->uploaded)
2007 continue;
2008
2009 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2010 continue;
2011
2012 for (state = IEEE80211_STA_NOTEXIST;
2013 state < sta->sta_state; state++)
2014 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2015 state + 1));
2016 }
2017 mutex_unlock(&local->sta_mtx);
2018
2019 /* add back keys */
2020 list_for_each_entry(sdata, &local->interfaces, list)
2021 if (ieee80211_sdata_running(sdata))
2022 ieee80211_enable_keys(sdata);
2023
2024 wake_up:
2025 local->in_reconfig = false;
2026 barrier();
2027
2028 if (local->monitors == local->open_count && local->monitors > 0)
2029 ieee80211_add_virtual_monitor(local);
2030
2031 /*
2032 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2033 * sessions can be established after a resume.
2034 *
2035 * Also tear down aggregation sessions since reconfiguring
2036 * them in a hardware restart scenario is not easily done
2037 * right now, and the hardware will have lost information
2038 * about the sessions, but we and the AP still think they
2039 * are active. This is really a workaround though.
2040 */
2041 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2042 mutex_lock(&local->sta_mtx);
2043
2044 list_for_each_entry(sta, &local->sta_list, list) {
2045 ieee80211_sta_tear_down_BA_sessions(
2046 sta, AGG_STOP_LOCAL_REQUEST);
2047 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2048 }
2049
2050 mutex_unlock(&local->sta_mtx);
2051 }
2052
2053 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2054 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2055 false);
2056
2057 /*
2058 * Reconfigure sched scan if it was interrupted by FW restart or
2059 * suspend.
2060 */
2061 mutex_lock(&local->mtx);
2062 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2063 lockdep_is_held(&local->mtx));
2064 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2065 lockdep_is_held(&local->mtx));
2066 if (sched_scan_sdata && sched_scan_req)
2067 /*
2068 * Sched scan stopped, but we don't want to report it. Instead,
2069 * we're trying to reschedule.
2070 */
2071 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2072 sched_scan_req))
2073 sched_scan_stopped = true;
2074 mutex_unlock(&local->mtx);
2075
2076 if (sched_scan_stopped)
2077 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2078
2079 /*
2080 * If this is for hw restart things are still running.
2081 * We may want to change that later, however.
2082 */
2083 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2084 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2085
2086 if (!local->suspended)
2087 return 0;
2088
2089 #ifdef CONFIG_PM
2090 /* first set suspended false, then resuming */
2091 local->suspended = false;
2092 mb();
2093 local->resuming = false;
2094
2095 /* It's possible that we don't handle the scan completion in
2096 * time during suspend, so if it's still marked as completed
2097 * here, queue the work and flush it to clean things up.
2098 * Instead of calling the worker function directly here, we
2099 * really queue it to avoid potential races with other flows
2100 * scheduling the same work.
2101 */
2102 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2103 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2104 flush_delayed_work(&local->scan_work);
2105 }
2106
2107 if (local->open_count && !reconfig_due_to_wowlan)
2108 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2109
2110 list_for_each_entry(sdata, &local->interfaces, list) {
2111 if (!ieee80211_sdata_running(sdata))
2112 continue;
2113 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2114 ieee80211_sta_restart(sdata);
2115 }
2116
2117 mod_timer(&local->sta_cleanup, jiffies + 1);
2118 #else
2119 WARN_ON(1);
2120 #endif
2121
2122 return 0;
2123 }
2124
2125 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2126 {
2127 struct ieee80211_sub_if_data *sdata;
2128 struct ieee80211_local *local;
2129 struct ieee80211_key *key;
2130
2131 if (WARN_ON(!vif))
2132 return;
2133
2134 sdata = vif_to_sdata(vif);
2135 local = sdata->local;
2136
2137 if (WARN_ON(!local->resuming))
2138 return;
2139
2140 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2141 return;
2142
2143 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2144
2145 mutex_lock(&local->key_mtx);
2146 list_for_each_entry(key, &sdata->key_list, list)
2147 key->flags |= KEY_FLAG_TAINTED;
2148 mutex_unlock(&local->key_mtx);
2149 }
2150 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2151
2152 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2153 {
2154 struct ieee80211_local *local = sdata->local;
2155 struct ieee80211_chanctx_conf *chanctx_conf;
2156 struct ieee80211_chanctx *chanctx;
2157
2158 mutex_lock(&local->chanctx_mtx);
2159
2160 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2161 lockdep_is_held(&local->chanctx_mtx));
2162
2163 if (WARN_ON_ONCE(!chanctx_conf))
2164 goto unlock;
2165
2166 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2167 ieee80211_recalc_smps_chanctx(local, chanctx);
2168 unlock:
2169 mutex_unlock(&local->chanctx_mtx);
2170 }
2171
2172 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2173 {
2174 struct ieee80211_local *local = sdata->local;
2175 struct ieee80211_chanctx_conf *chanctx_conf;
2176 struct ieee80211_chanctx *chanctx;
2177
2178 mutex_lock(&local->chanctx_mtx);
2179
2180 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2181 lockdep_is_held(&local->chanctx_mtx));
2182
2183 if (WARN_ON_ONCE(!chanctx_conf))
2184 goto unlock;
2185
2186 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2187 ieee80211_recalc_chanctx_min_def(local, chanctx);
2188 unlock:
2189 mutex_unlock(&local->chanctx_mtx);
2190 }
2191
2192 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2193 {
2194 int i;
2195
2196 for (i = 0; i < n_ids; i++)
2197 if (ids[i] == id)
2198 return true;
2199 return false;
2200 }
2201
2202 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2203 const u8 *ids, int n_ids,
2204 const u8 *after_ric, int n_after_ric,
2205 size_t offset)
2206 {
2207 size_t pos = offset;
2208
2209 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2210 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2211 pos += 2 + ies[pos + 1];
2212
2213 while (pos < ielen &&
2214 !ieee80211_id_in_list(after_ric, n_after_ric,
2215 ies[pos]))
2216 pos += 2 + ies[pos + 1];
2217 } else {
2218 pos += 2 + ies[pos + 1];
2219 }
2220 }
2221
2222 return pos;
2223 }
2224
2225 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2226 const u8 *ids, int n_ids, size_t offset)
2227 {
2228 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2229 }
2230 EXPORT_SYMBOL(ieee80211_ie_split);
2231
2232 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2233 {
2234 size_t pos = offset;
2235
2236 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2237 pos += 2 + ies[pos + 1];
2238
2239 return pos;
2240 }
2241
2242 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2243 int rssi_min_thold,
2244 int rssi_max_thold)
2245 {
2246 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2247
2248 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2249 return;
2250
2251 /*
2252 * Scale up threshold values before storing it, as the RSSI averaging
2253 * algorithm uses a scaled up value as well. Change this scaling
2254 * factor if the RSSI averaging algorithm changes.
2255 */
2256 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2257 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2258 }
2259
2260 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2261 int rssi_min_thold,
2262 int rssi_max_thold)
2263 {
2264 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2265
2266 WARN_ON(rssi_min_thold == rssi_max_thold ||
2267 rssi_min_thold > rssi_max_thold);
2268
2269 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2270 rssi_max_thold);
2271 }
2272 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2273
2274 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2275 {
2276 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2277
2278 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2279 }
2280 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2281
2282 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2283 u16 cap)
2284 {
2285 __le16 tmp;
2286
2287 *pos++ = WLAN_EID_HT_CAPABILITY;
2288 *pos++ = sizeof(struct ieee80211_ht_cap);
2289 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2290
2291 /* capability flags */
2292 tmp = cpu_to_le16(cap);
2293 memcpy(pos, &tmp, sizeof(u16));
2294 pos += sizeof(u16);
2295
2296 /* AMPDU parameters */
2297 *pos++ = ht_cap->ampdu_factor |
2298 (ht_cap->ampdu_density <<
2299 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2300
2301 /* MCS set */
2302 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2303 pos += sizeof(ht_cap->mcs);
2304
2305 /* extended capabilities */
2306 pos += sizeof(__le16);
2307
2308 /* BF capabilities */
2309 pos += sizeof(__le32);
2310
2311 /* antenna selection */
2312 pos += sizeof(u8);
2313
2314 return pos;
2315 }
2316
2317 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2318 u32 cap)
2319 {
2320 __le32 tmp;
2321
2322 *pos++ = WLAN_EID_VHT_CAPABILITY;
2323 *pos++ = sizeof(struct ieee80211_vht_cap);
2324 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2325
2326 /* capability flags */
2327 tmp = cpu_to_le32(cap);
2328 memcpy(pos, &tmp, sizeof(u32));
2329 pos += sizeof(u32);
2330
2331 /* VHT MCS set */
2332 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2333 pos += sizeof(vht_cap->vht_mcs);
2334
2335 return pos;
2336 }
2337
2338 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2339 const struct cfg80211_chan_def *chandef,
2340 u16 prot_mode)
2341 {
2342 struct ieee80211_ht_operation *ht_oper;
2343 /* Build HT Information */
2344 *pos++ = WLAN_EID_HT_OPERATION;
2345 *pos++ = sizeof(struct ieee80211_ht_operation);
2346 ht_oper = (struct ieee80211_ht_operation *)pos;
2347 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2348 chandef->chan->center_freq);
2349 switch (chandef->width) {
2350 case NL80211_CHAN_WIDTH_160:
2351 case NL80211_CHAN_WIDTH_80P80:
2352 case NL80211_CHAN_WIDTH_80:
2353 case NL80211_CHAN_WIDTH_40:
2354 if (chandef->center_freq1 > chandef->chan->center_freq)
2355 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2356 else
2357 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2358 break;
2359 default:
2360 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2361 break;
2362 }
2363 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2364 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2365 chandef->width != NL80211_CHAN_WIDTH_20)
2366 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2367
2368 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2369 ht_oper->stbc_param = 0x0000;
2370
2371 /* It seems that Basic MCS set and Supported MCS set
2372 are identical for the first 10 bytes */
2373 memset(&ht_oper->basic_set, 0, 16);
2374 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2375
2376 return pos + sizeof(struct ieee80211_ht_operation);
2377 }
2378
2379 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2380 const struct cfg80211_chan_def *chandef)
2381 {
2382 struct ieee80211_vht_operation *vht_oper;
2383
2384 *pos++ = WLAN_EID_VHT_OPERATION;
2385 *pos++ = sizeof(struct ieee80211_vht_operation);
2386 vht_oper = (struct ieee80211_vht_operation *)pos;
2387 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2388 chandef->center_freq1);
2389 if (chandef->center_freq2)
2390 vht_oper->center_freq_seg2_idx =
2391 ieee80211_frequency_to_channel(chandef->center_freq2);
2392
2393 switch (chandef->width) {
2394 case NL80211_CHAN_WIDTH_160:
2395 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2396 break;
2397 case NL80211_CHAN_WIDTH_80P80:
2398 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2399 break;
2400 case NL80211_CHAN_WIDTH_80:
2401 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2402 break;
2403 default:
2404 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2405 break;
2406 }
2407
2408 /* don't require special VHT peer rates */
2409 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2410
2411 return pos + sizeof(struct ieee80211_vht_operation);
2412 }
2413
2414 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2415 const struct ieee80211_ht_operation *ht_oper,
2416 struct cfg80211_chan_def *chandef)
2417 {
2418 enum nl80211_channel_type channel_type;
2419
2420 if (!ht_oper) {
2421 cfg80211_chandef_create(chandef, control_chan,
2422 NL80211_CHAN_NO_HT);
2423 return;
2424 }
2425
2426 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2427 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2428 channel_type = NL80211_CHAN_HT20;
2429 break;
2430 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2431 channel_type = NL80211_CHAN_HT40PLUS;
2432 break;
2433 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2434 channel_type = NL80211_CHAN_HT40MINUS;
2435 break;
2436 default:
2437 channel_type = NL80211_CHAN_NO_HT;
2438 }
2439
2440 cfg80211_chandef_create(chandef, control_chan, channel_type);
2441 }
2442
2443 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2444 const struct ieee80211_vht_operation *oper,
2445 struct cfg80211_chan_def *chandef)
2446 {
2447 if (!oper)
2448 return;
2449
2450 chandef->chan = control_chan;
2451
2452 switch (oper->chan_width) {
2453 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2454 break;
2455 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2456 chandef->width = NL80211_CHAN_WIDTH_80;
2457 break;
2458 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2459 chandef->width = NL80211_CHAN_WIDTH_160;
2460 break;
2461 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2462 chandef->width = NL80211_CHAN_WIDTH_80P80;
2463 break;
2464 default:
2465 break;
2466 }
2467
2468 chandef->center_freq1 =
2469 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2470 control_chan->band);
2471 chandef->center_freq2 =
2472 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2473 control_chan->band);
2474 }
2475
2476 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2477 const struct ieee80211_supported_band *sband,
2478 const u8 *srates, int srates_len, u32 *rates)
2479 {
2480 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2481 int shift = ieee80211_chandef_get_shift(chandef);
2482 struct ieee80211_rate *br;
2483 int brate, rate, i, j, count = 0;
2484
2485 *rates = 0;
2486
2487 for (i = 0; i < srates_len; i++) {
2488 rate = srates[i] & 0x7f;
2489
2490 for (j = 0; j < sband->n_bitrates; j++) {
2491 br = &sband->bitrates[j];
2492 if ((rate_flags & br->flags) != rate_flags)
2493 continue;
2494
2495 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2496 if (brate == rate) {
2497 *rates |= BIT(j);
2498 count++;
2499 break;
2500 }
2501 }
2502 }
2503 return count;
2504 }
2505
2506 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2507 struct sk_buff *skb, bool need_basic,
2508 enum ieee80211_band band)
2509 {
2510 struct ieee80211_local *local = sdata->local;
2511 struct ieee80211_supported_band *sband;
2512 int rate, shift;
2513 u8 i, rates, *pos;
2514 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2515 u32 rate_flags;
2516
2517 shift = ieee80211_vif_get_shift(&sdata->vif);
2518 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2519 sband = local->hw.wiphy->bands[band];
2520 rates = 0;
2521 for (i = 0; i < sband->n_bitrates; i++) {
2522 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2523 continue;
2524 rates++;
2525 }
2526 if (rates > 8)
2527 rates = 8;
2528
2529 if (skb_tailroom(skb) < rates + 2)
2530 return -ENOMEM;
2531
2532 pos = skb_put(skb, rates + 2);
2533 *pos++ = WLAN_EID_SUPP_RATES;
2534 *pos++ = rates;
2535 for (i = 0; i < rates; i++) {
2536 u8 basic = 0;
2537 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2538 continue;
2539
2540 if (need_basic && basic_rates & BIT(i))
2541 basic = 0x80;
2542 rate = sband->bitrates[i].bitrate;
2543 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2544 5 * (1 << shift));
2545 *pos++ = basic | (u8) rate;
2546 }
2547
2548 return 0;
2549 }
2550
2551 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2552 struct sk_buff *skb, bool need_basic,
2553 enum ieee80211_band band)
2554 {
2555 struct ieee80211_local *local = sdata->local;
2556 struct ieee80211_supported_band *sband;
2557 int rate, shift;
2558 u8 i, exrates, *pos;
2559 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2560 u32 rate_flags;
2561
2562 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2563 shift = ieee80211_vif_get_shift(&sdata->vif);
2564
2565 sband = local->hw.wiphy->bands[band];
2566 exrates = 0;
2567 for (i = 0; i < sband->n_bitrates; i++) {
2568 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2569 continue;
2570 exrates++;
2571 }
2572
2573 if (exrates > 8)
2574 exrates -= 8;
2575 else
2576 exrates = 0;
2577
2578 if (skb_tailroom(skb) < exrates + 2)
2579 return -ENOMEM;
2580
2581 if (exrates) {
2582 pos = skb_put(skb, exrates + 2);
2583 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2584 *pos++ = exrates;
2585 for (i = 8; i < sband->n_bitrates; i++) {
2586 u8 basic = 0;
2587 if ((rate_flags & sband->bitrates[i].flags)
2588 != rate_flags)
2589 continue;
2590 if (need_basic && basic_rates & BIT(i))
2591 basic = 0x80;
2592 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2593 5 * (1 << shift));
2594 *pos++ = basic | (u8) rate;
2595 }
2596 }
2597 return 0;
2598 }
2599
2600 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2601 {
2602 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2603 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2604
2605 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2606 /* non-managed type inferfaces */
2607 return 0;
2608 }
2609 return ifmgd->ave_beacon_signal / 16;
2610 }
2611 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2612
2613 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2614 {
2615 if (!mcs)
2616 return 1;
2617
2618 /* TODO: consider rx_highest */
2619
2620 if (mcs->rx_mask[3])
2621 return 4;
2622 if (mcs->rx_mask[2])
2623 return 3;
2624 if (mcs->rx_mask[1])
2625 return 2;
2626 return 1;
2627 }
2628
2629 /**
2630 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2631 * @local: mac80211 hw info struct
2632 * @status: RX status
2633 * @mpdu_len: total MPDU length (including FCS)
2634 * @mpdu_offset: offset into MPDU to calculate timestamp at
2635 *
2636 * This function calculates the RX timestamp at the given MPDU offset, taking
2637 * into account what the RX timestamp was. An offset of 0 will just normalize
2638 * the timestamp to TSF at beginning of MPDU reception.
2639 */
2640 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2641 struct ieee80211_rx_status *status,
2642 unsigned int mpdu_len,
2643 unsigned int mpdu_offset)
2644 {
2645 u64 ts = status->mactime;
2646 struct rate_info ri;
2647 u16 rate;
2648
2649 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2650 return 0;
2651
2652 memset(&ri, 0, sizeof(ri));
2653
2654 /* Fill cfg80211 rate info */
2655 if (status->flag & RX_FLAG_HT) {
2656 ri.mcs = status->rate_idx;
2657 ri.flags |= RATE_INFO_FLAGS_MCS;
2658 if (status->flag & RX_FLAG_40MHZ)
2659 ri.bw = RATE_INFO_BW_40;
2660 else
2661 ri.bw = RATE_INFO_BW_20;
2662 if (status->flag & RX_FLAG_SHORT_GI)
2663 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2664 } else if (status->flag & RX_FLAG_VHT) {
2665 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2666 ri.mcs = status->rate_idx;
2667 ri.nss = status->vht_nss;
2668 if (status->flag & RX_FLAG_40MHZ)
2669 ri.bw = RATE_INFO_BW_40;
2670 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2671 ri.bw = RATE_INFO_BW_80;
2672 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2673 ri.bw = RATE_INFO_BW_160;
2674 else
2675 ri.bw = RATE_INFO_BW_20;
2676 if (status->flag & RX_FLAG_SHORT_GI)
2677 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2678 } else {
2679 struct ieee80211_supported_band *sband;
2680 int shift = 0;
2681 int bitrate;
2682
2683 if (status->flag & RX_FLAG_10MHZ) {
2684 shift = 1;
2685 ri.bw = RATE_INFO_BW_10;
2686 } else if (status->flag & RX_FLAG_5MHZ) {
2687 shift = 2;
2688 ri.bw = RATE_INFO_BW_5;
2689 } else {
2690 ri.bw = RATE_INFO_BW_20;
2691 }
2692
2693 sband = local->hw.wiphy->bands[status->band];
2694 bitrate = sband->bitrates[status->rate_idx].bitrate;
2695 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2696 }
2697
2698 rate = cfg80211_calculate_bitrate(&ri);
2699 if (WARN_ONCE(!rate,
2700 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2701 status->flag, status->rate_idx, status->vht_nss))
2702 return 0;
2703
2704 /* rewind from end of MPDU */
2705 if (status->flag & RX_FLAG_MACTIME_END)
2706 ts -= mpdu_len * 8 * 10 / rate;
2707
2708 ts += mpdu_offset * 8 * 10 / rate;
2709
2710 return ts;
2711 }
2712
2713 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2714 {
2715 struct ieee80211_sub_if_data *sdata;
2716 struct cfg80211_chan_def chandef;
2717
2718 mutex_lock(&local->mtx);
2719 mutex_lock(&local->iflist_mtx);
2720 list_for_each_entry(sdata, &local->interfaces, list) {
2721 /* it might be waiting for the local->mtx, but then
2722 * by the time it gets it, sdata->wdev.cac_started
2723 * will no longer be true
2724 */
2725 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2726
2727 if (sdata->wdev.cac_started) {
2728 chandef = sdata->vif.bss_conf.chandef;
2729 ieee80211_vif_release_channel(sdata);
2730 cfg80211_cac_event(sdata->dev,
2731 &chandef,
2732 NL80211_RADAR_CAC_ABORTED,
2733 GFP_KERNEL);
2734 }
2735 }
2736 mutex_unlock(&local->iflist_mtx);
2737 mutex_unlock(&local->mtx);
2738 }
2739
2740 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2741 {
2742 struct ieee80211_local *local =
2743 container_of(work, struct ieee80211_local, radar_detected_work);
2744 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2745 struct ieee80211_chanctx *ctx;
2746 int num_chanctx = 0;
2747
2748 mutex_lock(&local->chanctx_mtx);
2749 list_for_each_entry(ctx, &local->chanctx_list, list) {
2750 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2751 continue;
2752
2753 num_chanctx++;
2754 chandef = ctx->conf.def;
2755 }
2756 mutex_unlock(&local->chanctx_mtx);
2757
2758 ieee80211_dfs_cac_cancel(local);
2759
2760 if (num_chanctx > 1)
2761 /* XXX: multi-channel is not supported yet */
2762 WARN_ON(1);
2763 else
2764 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2765 }
2766
2767 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2768 {
2769 struct ieee80211_local *local = hw_to_local(hw);
2770
2771 trace_api_radar_detected(local);
2772
2773 ieee80211_queue_work(hw, &local->radar_detected_work);
2774 }
2775 EXPORT_SYMBOL(ieee80211_radar_detected);
2776
2777 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2778 {
2779 u32 ret;
2780 int tmp;
2781
2782 switch (c->width) {
2783 case NL80211_CHAN_WIDTH_20:
2784 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2785 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2786 break;
2787 case NL80211_CHAN_WIDTH_40:
2788 c->width = NL80211_CHAN_WIDTH_20;
2789 c->center_freq1 = c->chan->center_freq;
2790 ret = IEEE80211_STA_DISABLE_40MHZ |
2791 IEEE80211_STA_DISABLE_VHT;
2792 break;
2793 case NL80211_CHAN_WIDTH_80:
2794 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2795 /* n_P40 */
2796 tmp /= 2;
2797 /* freq_P40 */
2798 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2799 c->width = NL80211_CHAN_WIDTH_40;
2800 ret = IEEE80211_STA_DISABLE_VHT;
2801 break;
2802 case NL80211_CHAN_WIDTH_80P80:
2803 c->center_freq2 = 0;
2804 c->width = NL80211_CHAN_WIDTH_80;
2805 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2806 IEEE80211_STA_DISABLE_160MHZ;
2807 break;
2808 case NL80211_CHAN_WIDTH_160:
2809 /* n_P20 */
2810 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2811 /* n_P80 */
2812 tmp /= 4;
2813 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2814 c->width = NL80211_CHAN_WIDTH_80;
2815 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2816 IEEE80211_STA_DISABLE_160MHZ;
2817 break;
2818 default:
2819 case NL80211_CHAN_WIDTH_20_NOHT:
2820 WARN_ON_ONCE(1);
2821 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2822 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2823 break;
2824 case NL80211_CHAN_WIDTH_5:
2825 case NL80211_CHAN_WIDTH_10:
2826 WARN_ON_ONCE(1);
2827 /* keep c->width */
2828 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2829 break;
2830 }
2831
2832 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2833
2834 return ret;
2835 }
2836
2837 /*
2838 * Returns true if smps_mode_new is strictly more restrictive than
2839 * smps_mode_old.
2840 */
2841 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2842 enum ieee80211_smps_mode smps_mode_new)
2843 {
2844 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2845 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2846 return false;
2847
2848 switch (smps_mode_old) {
2849 case IEEE80211_SMPS_STATIC:
2850 return false;
2851 case IEEE80211_SMPS_DYNAMIC:
2852 return smps_mode_new == IEEE80211_SMPS_STATIC;
2853 case IEEE80211_SMPS_OFF:
2854 return smps_mode_new != IEEE80211_SMPS_OFF;
2855 default:
2856 WARN_ON(1);
2857 }
2858
2859 return false;
2860 }
2861
2862 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2863 struct cfg80211_csa_settings *csa_settings)
2864 {
2865 struct sk_buff *skb;
2866 struct ieee80211_mgmt *mgmt;
2867 struct ieee80211_local *local = sdata->local;
2868 int freq;
2869 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2870 sizeof(mgmt->u.action.u.chan_switch);
2871 u8 *pos;
2872
2873 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2874 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2875 return -EOPNOTSUPP;
2876
2877 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2878 5 + /* channel switch announcement element */
2879 3 + /* secondary channel offset element */
2880 8); /* mesh channel switch parameters element */
2881 if (!skb)
2882 return -ENOMEM;
2883
2884 skb_reserve(skb, local->tx_headroom);
2885 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2886 memset(mgmt, 0, hdr_len);
2887 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2888 IEEE80211_STYPE_ACTION);
2889
2890 eth_broadcast_addr(mgmt->da);
2891 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2892 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2893 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2894 } else {
2895 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2896 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2897 }
2898 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2899 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2900 pos = skb_put(skb, 5);
2901 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2902 *pos++ = 3; /* IE length */
2903 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2904 freq = csa_settings->chandef.chan->center_freq;
2905 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2906 *pos++ = csa_settings->count; /* count */
2907
2908 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2909 enum nl80211_channel_type ch_type;
2910
2911 skb_put(skb, 3);
2912 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2913 *pos++ = 1; /* IE length */
2914 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2915 if (ch_type == NL80211_CHAN_HT40PLUS)
2916 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2917 else
2918 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2919 }
2920
2921 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2922 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2923
2924 skb_put(skb, 8);
2925 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2926 *pos++ = 6; /* IE length */
2927 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2928 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2929 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2930 *pos++ |= csa_settings->block_tx ?
2931 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2932 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2933 pos += 2;
2934 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2935 pos += 2;
2936 }
2937
2938 ieee80211_tx_skb(sdata, skb);
2939 return 0;
2940 }
2941
2942 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2943 {
2944 return !(cs == NULL || cs->cipher == 0 ||
2945 cs->hdr_len < cs->pn_len + cs->pn_off ||
2946 cs->hdr_len <= cs->key_idx_off ||
2947 cs->key_idx_shift > 7 ||
2948 cs->key_idx_mask == 0);
2949 }
2950
2951 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2952 {
2953 int i;
2954
2955 /* Ensure we have enough iftype bitmap space for all iftype values */
2956 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2957
2958 for (i = 0; i < n; i++)
2959 if (!ieee80211_cs_valid(&cs[i]))
2960 return false;
2961
2962 return true;
2963 }
2964
2965 const struct ieee80211_cipher_scheme *
2966 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2967 enum nl80211_iftype iftype)
2968 {
2969 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2970 int n = local->hw.n_cipher_schemes;
2971 int i;
2972 const struct ieee80211_cipher_scheme *cs = NULL;
2973
2974 for (i = 0; i < n; i++) {
2975 if (l[i].cipher == cipher) {
2976 cs = &l[i];
2977 break;
2978 }
2979 }
2980
2981 if (!cs || !(cs->iftype & BIT(iftype)))
2982 return NULL;
2983
2984 return cs;
2985 }
2986
2987 int ieee80211_cs_headroom(struct ieee80211_local *local,
2988 struct cfg80211_crypto_settings *crypto,
2989 enum nl80211_iftype iftype)
2990 {
2991 const struct ieee80211_cipher_scheme *cs;
2992 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2993 int i;
2994
2995 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2996 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2997 iftype);
2998
2999 if (cs && headroom < cs->hdr_len)
3000 headroom = cs->hdr_len;
3001 }
3002
3003 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3004 if (cs && headroom < cs->hdr_len)
3005 headroom = cs->hdr_len;
3006
3007 return headroom;
3008 }
3009
3010 static bool
3011 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3012 {
3013 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3014 int skip;
3015
3016 if (end > 0)
3017 return false;
3018
3019 /* End time is in the past, check for repetitions */
3020 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3021 if (data->count[i] < 255) {
3022 if (data->count[i] <= skip) {
3023 data->count[i] = 0;
3024 return false;
3025 }
3026
3027 data->count[i] -= skip;
3028 }
3029
3030 data->desc[i].start += skip * data->desc[i].interval;
3031
3032 return true;
3033 }
3034
3035 static bool
3036 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3037 s32 *offset)
3038 {
3039 bool ret = false;
3040 int i;
3041
3042 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3043 s32 cur;
3044
3045 if (!data->count[i])
3046 continue;
3047
3048 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3049 ret = true;
3050
3051 cur = data->desc[i].start - tsf;
3052 if (cur > *offset)
3053 continue;
3054
3055 cur = data->desc[i].start + data->desc[i].duration - tsf;
3056 if (cur > *offset)
3057 *offset = cur;
3058 }
3059
3060 return ret;
3061 }
3062
3063 static u32
3064 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3065 {
3066 s32 offset = 0;
3067 int tries = 0;
3068 /*
3069 * arbitrary limit, used to avoid infinite loops when combined NoA
3070 * descriptors cover the full time period.
3071 */
3072 int max_tries = 5;
3073
3074 ieee80211_extend_absent_time(data, tsf, &offset);
3075 do {
3076 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3077 break;
3078
3079 tries++;
3080 } while (tries < max_tries);
3081
3082 return offset;
3083 }
3084
3085 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3086 {
3087 u32 next_offset = BIT(31) - 1;
3088 int i;
3089
3090 data->absent = 0;
3091 data->has_next_tsf = false;
3092 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3093 s32 start;
3094
3095 if (!data->count[i])
3096 continue;
3097
3098 ieee80211_extend_noa_desc(data, tsf, i);
3099 start = data->desc[i].start - tsf;
3100 if (start <= 0)
3101 data->absent |= BIT(i);
3102
3103 if (next_offset > start)
3104 next_offset = start;
3105
3106 data->has_next_tsf = true;
3107 }
3108
3109 if (data->absent)
3110 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3111
3112 data->next_tsf = tsf + next_offset;
3113 }
3114 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3115
3116 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3117 struct ieee80211_noa_data *data, u32 tsf)
3118 {
3119 int ret = 0;
3120 int i;
3121
3122 memset(data, 0, sizeof(*data));
3123
3124 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3125 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3126
3127 if (!desc->count || !desc->duration)
3128 continue;
3129
3130 data->count[i] = desc->count;
3131 data->desc[i].start = le32_to_cpu(desc->start_time);
3132 data->desc[i].duration = le32_to_cpu(desc->duration);
3133 data->desc[i].interval = le32_to_cpu(desc->interval);
3134
3135 if (data->count[i] > 1 &&
3136 data->desc[i].interval < data->desc[i].duration)
3137 continue;
3138
3139 ieee80211_extend_noa_desc(data, tsf, i);
3140 ret++;
3141 }
3142
3143 if (ret)
3144 ieee80211_update_p2p_noa(data, tsf);
3145
3146 return ret;
3147 }
3148 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3149
3150 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3151 struct ieee80211_sub_if_data *sdata)
3152 {
3153 u64 tsf = drv_get_tsf(local, sdata);
3154 u64 dtim_count = 0;
3155 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3156 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3157 struct ps_data *ps;
3158 u8 bcns_from_dtim;
3159
3160 if (tsf == -1ULL || !beacon_int || !dtim_period)
3161 return;
3162
3163 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3164 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3165 if (!sdata->bss)
3166 return;
3167
3168 ps = &sdata->bss->ps;
3169 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3170 ps = &sdata->u.mesh.ps;
3171 } else {
3172 return;
3173 }
3174
3175 /*
3176 * actually finds last dtim_count, mac80211 will update in
3177 * __beacon_add_tim().
3178 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3179 */
3180 do_div(tsf, beacon_int);
3181 bcns_from_dtim = do_div(tsf, dtim_period);
3182 /* just had a DTIM */
3183 if (!bcns_from_dtim)
3184 dtim_count = 0;
3185 else
3186 dtim_count = dtim_period - bcns_from_dtim;
3187
3188 ps->dtim_count = dtim_count;
3189 }
3190
3191 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3192 struct ieee80211_chanctx *ctx)
3193 {
3194 struct ieee80211_sub_if_data *sdata;
3195 u8 radar_detect = 0;
3196
3197 lockdep_assert_held(&local->chanctx_mtx);
3198
3199 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3200 return 0;
3201
3202 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3203 if (sdata->reserved_radar_required)
3204 radar_detect |= BIT(sdata->reserved_chandef.width);
3205
3206 /*
3207 * An in-place reservation context should not have any assigned vifs
3208 * until it replaces the other context.
3209 */
3210 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3211 !list_empty(&ctx->assigned_vifs));
3212
3213 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3214 if (sdata->radar_required)
3215 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3216
3217 return radar_detect;
3218 }
3219
3220 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3221 const struct cfg80211_chan_def *chandef,
3222 enum ieee80211_chanctx_mode chanmode,
3223 u8 radar_detect)
3224 {
3225 struct ieee80211_local *local = sdata->local;
3226 struct ieee80211_sub_if_data *sdata_iter;
3227 enum nl80211_iftype iftype = sdata->wdev.iftype;
3228 int num[NUM_NL80211_IFTYPES];
3229 struct ieee80211_chanctx *ctx;
3230 int num_different_channels = 0;
3231 int total = 1;
3232
3233 lockdep_assert_held(&local->chanctx_mtx);
3234
3235 if (WARN_ON(hweight32(radar_detect) > 1))
3236 return -EINVAL;
3237
3238 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3239 !chandef->chan))
3240 return -EINVAL;
3241
3242 if (chandef)
3243 num_different_channels = 1;
3244
3245 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3246 return -EINVAL;
3247
3248 /* Always allow software iftypes */
3249 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3250 if (radar_detect)
3251 return -EINVAL;
3252 return 0;
3253 }
3254
3255 memset(num, 0, sizeof(num));
3256
3257 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3258 num[iftype] = 1;
3259
3260 list_for_each_entry(ctx, &local->chanctx_list, list) {
3261 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3262 continue;
3263 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3264 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3265 num_different_channels++;
3266 continue;
3267 }
3268 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3269 cfg80211_chandef_compatible(chandef,
3270 &ctx->conf.def))
3271 continue;
3272 num_different_channels++;
3273 }
3274
3275 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3276 struct wireless_dev *wdev_iter;
3277
3278 wdev_iter = &sdata_iter->wdev;
3279
3280 if (sdata_iter == sdata ||
3281 !ieee80211_sdata_running(sdata_iter) ||
3282 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3283 continue;
3284
3285 num[wdev_iter->iftype]++;
3286 total++;
3287 }
3288
3289 if (total == 1 && !radar_detect)
3290 return 0;
3291
3292 return cfg80211_check_combinations(local->hw.wiphy,
3293 num_different_channels,
3294 radar_detect, num);
3295 }
3296
3297 static void
3298 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3299 void *data)
3300 {
3301 u32 *max_num_different_channels = data;
3302
3303 *max_num_different_channels = max(*max_num_different_channels,
3304 c->num_different_channels);
3305 }
3306
3307 int ieee80211_max_num_channels(struct ieee80211_local *local)
3308 {
3309 struct ieee80211_sub_if_data *sdata;
3310 int num[NUM_NL80211_IFTYPES] = {};
3311 struct ieee80211_chanctx *ctx;
3312 int num_different_channels = 0;
3313 u8 radar_detect = 0;
3314 u32 max_num_different_channels = 1;
3315 int err;
3316
3317 lockdep_assert_held(&local->chanctx_mtx);
3318
3319 list_for_each_entry(ctx, &local->chanctx_list, list) {
3320 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3321 continue;
3322
3323 num_different_channels++;
3324
3325 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3326 }
3327
3328 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3329 num[sdata->wdev.iftype]++;
3330
3331 err = cfg80211_iter_combinations(local->hw.wiphy,
3332 num_different_channels, radar_detect,
3333 num, ieee80211_iter_max_chans,
3334 &max_num_different_channels);
3335 if (err < 0)
3336 return err;
3337
3338 return max_num_different_channels;
3339 }
3340
3341 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3342 {
3343 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3344 *buf++ = 7; /* len */
3345 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3346 *buf++ = 0x50;
3347 *buf++ = 0xf2;
3348 *buf++ = 2; /* WME */
3349 *buf++ = 0; /* WME info */
3350 *buf++ = 1; /* WME ver */
3351 *buf++ = qosinfo; /* U-APSD no in use */
3352
3353 return buf;
3354 }
Linux kernel - Deliverables
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