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mac80211: Use a cfg80211_chan_def in ieee80211_hw_conf_chan
[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 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "mesh.h"
32 #include "wme.h"
33 #include "led.h"
34 #include "wep.h"
35
36 /* privid for wiphys to determine whether they belong to us or not */
37 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40 {
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46 }
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
51 {
52 __le16 fc = hdr->frame_control;
53
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
56 return NULL;
57
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
61
62 if (ieee80211_has_a4(fc))
63 return NULL;
64 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
67 return hdr->addr2;
68
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
75 return hdr->addr3;
76 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if(ieee80211_is_pspoll(fc))
80 return hdr->addr1;
81
82 if (ieee80211_is_back_req(fc)) {
83 switch (type) {
84 case NL80211_IFTYPE_STATION:
85 return hdr->addr2;
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
88 return hdr->addr1;
89 default:
90 break; /* fall through to the return */
91 }
92 }
93 }
94
95 return NULL;
96 }
97
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
99 {
100 struct sk_buff *skb;
101 struct ieee80211_hdr *hdr;
102
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
106 }
107 }
108
109 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble)
111 {
112 int dur;
113
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
117 * also include SIFS.
118 *
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
121 */
122
123 if (band == IEEE80211_BAND_5GHZ || erp) {
124 /*
125 * OFDM:
126 *
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
131 *
132 * T_SYM = 4 usec
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
136 */
137 dur = 16; /* SIFS + signal ext */
138 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate); /* T_SYM x N_SYM */
142 } else {
143 /*
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
147 *
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
152 */
153 dur = 10; /* aSIFSTime = 10 usec */
154 dur += short_preamble ? (72 + 24) : (144 + 48);
155
156 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
157 }
158
159 return dur;
160 }
161
162 /* Exported duration function for driver use */
163 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164 struct ieee80211_vif *vif,
165 enum ieee80211_band band,
166 size_t frame_len,
167 struct ieee80211_rate *rate)
168 {
169 struct ieee80211_sub_if_data *sdata;
170 u16 dur;
171 int erp;
172 bool short_preamble = false;
173
174 erp = 0;
175 if (vif) {
176 sdata = vif_to_sdata(vif);
177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
180 }
181
182 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
183 short_preamble);
184
185 return cpu_to_le16(dur);
186 }
187 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
188
189 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190 struct ieee80211_vif *vif, size_t frame_len,
191 const struct ieee80211_tx_info *frame_txctl)
192 {
193 struct ieee80211_local *local = hw_to_local(hw);
194 struct ieee80211_rate *rate;
195 struct ieee80211_sub_if_data *sdata;
196 bool short_preamble;
197 int erp;
198 u16 dur;
199 struct ieee80211_supported_band *sband;
200
201 sband = local->hw.wiphy->bands[frame_txctl->band];
202
203 short_preamble = false;
204
205 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
206
207 erp = 0;
208 if (vif) {
209 sdata = vif_to_sdata(vif);
210 short_preamble = sdata->vif.bss_conf.use_short_preamble;
211 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212 erp = rate->flags & IEEE80211_RATE_ERP_G;
213 }
214
215 /* CTS duration */
216 dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
217 erp, short_preamble);
218 /* Data frame duration */
219 dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
220 erp, short_preamble);
221 /* ACK duration */
222 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
223 erp, short_preamble);
224
225 return cpu_to_le16(dur);
226 }
227 EXPORT_SYMBOL(ieee80211_rts_duration);
228
229 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230 struct ieee80211_vif *vif,
231 size_t frame_len,
232 const struct ieee80211_tx_info *frame_txctl)
233 {
234 struct ieee80211_local *local = hw_to_local(hw);
235 struct ieee80211_rate *rate;
236 struct ieee80211_sub_if_data *sdata;
237 bool short_preamble;
238 int erp;
239 u16 dur;
240 struct ieee80211_supported_band *sband;
241
242 sband = local->hw.wiphy->bands[frame_txctl->band];
243
244 short_preamble = false;
245
246 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
247 erp = 0;
248 if (vif) {
249 sdata = vif_to_sdata(vif);
250 short_preamble = sdata->vif.bss_conf.use_short_preamble;
251 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252 erp = rate->flags & IEEE80211_RATE_ERP_G;
253 }
254
255 /* Data frame duration */
256 dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
257 erp, short_preamble);
258 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
259 /* ACK duration */
260 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
261 erp, short_preamble);
262 }
263
264 return cpu_to_le16(dur);
265 }
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
267
268 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
269 {
270 struct ieee80211_sub_if_data *sdata;
271 int n_acs = IEEE80211_NUM_ACS;
272
273 if (local->hw.queues < IEEE80211_NUM_ACS)
274 n_acs = 1;
275
276 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
277 int ac;
278
279 if (!sdata->dev)
280 continue;
281
282 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
283 continue;
284
285 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
286 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
287 continue;
288
289 for (ac = 0; ac < n_acs; ac++) {
290 int ac_queue = sdata->vif.hw_queue[ac];
291
292 if (ac_queue == queue ||
293 (sdata->vif.cab_queue == queue &&
294 local->queue_stop_reasons[ac_queue] == 0 &&
295 skb_queue_empty(&local->pending[ac_queue])))
296 netif_wake_subqueue(sdata->dev, ac);
297 }
298 }
299 }
300
301 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
302 enum queue_stop_reason reason)
303 {
304 struct ieee80211_local *local = hw_to_local(hw);
305
306 trace_wake_queue(local, queue, reason);
307
308 if (WARN_ON(queue >= hw->queues))
309 return;
310
311 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
312 return;
313
314 __clear_bit(reason, &local->queue_stop_reasons[queue]);
315
316 if (local->queue_stop_reasons[queue] != 0)
317 /* someone still has this queue stopped */
318 return;
319
320 if (skb_queue_empty(&local->pending[queue])) {
321 rcu_read_lock();
322 ieee80211_propagate_queue_wake(local, queue);
323 rcu_read_unlock();
324 } else
325 tasklet_schedule(&local->tx_pending_tasklet);
326 }
327
328 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
329 enum queue_stop_reason reason)
330 {
331 struct ieee80211_local *local = hw_to_local(hw);
332 unsigned long flags;
333
334 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335 __ieee80211_wake_queue(hw, queue, reason);
336 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
337 }
338
339 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
340 {
341 ieee80211_wake_queue_by_reason(hw, queue,
342 IEEE80211_QUEUE_STOP_REASON_DRIVER);
343 }
344 EXPORT_SYMBOL(ieee80211_wake_queue);
345
346 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
348 {
349 struct ieee80211_local *local = hw_to_local(hw);
350 struct ieee80211_sub_if_data *sdata;
351 int n_acs = IEEE80211_NUM_ACS;
352
353 trace_stop_queue(local, queue, reason);
354
355 if (WARN_ON(queue >= hw->queues))
356 return;
357
358 if (test_bit(reason, &local->queue_stop_reasons[queue]))
359 return;
360
361 __set_bit(reason, &local->queue_stop_reasons[queue]);
362
363 if (local->hw.queues < IEEE80211_NUM_ACS)
364 n_acs = 1;
365
366 rcu_read_lock();
367 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
368 int ac;
369
370 if (!sdata->dev)
371 continue;
372
373 for (ac = 0; ac < n_acs; ac++) {
374 if (sdata->vif.hw_queue[ac] == queue ||
375 sdata->vif.cab_queue == queue)
376 netif_stop_subqueue(sdata->dev, ac);
377 }
378 }
379 rcu_read_unlock();
380 }
381
382 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
383 enum queue_stop_reason reason)
384 {
385 struct ieee80211_local *local = hw_to_local(hw);
386 unsigned long flags;
387
388 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
389 __ieee80211_stop_queue(hw, queue, reason);
390 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
391 }
392
393 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
394 {
395 ieee80211_stop_queue_by_reason(hw, queue,
396 IEEE80211_QUEUE_STOP_REASON_DRIVER);
397 }
398 EXPORT_SYMBOL(ieee80211_stop_queue);
399
400 void ieee80211_add_pending_skb(struct ieee80211_local *local,
401 struct sk_buff *skb)
402 {
403 struct ieee80211_hw *hw = &local->hw;
404 unsigned long flags;
405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
406 int queue = info->hw_queue;
407
408 if (WARN_ON(!info->control.vif)) {
409 ieee80211_free_txskb(&local->hw, skb);
410 return;
411 }
412
413 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
414 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
415 __skb_queue_tail(&local->pending[queue], skb);
416 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
417 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418 }
419
420 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
421 struct sk_buff_head *skbs,
422 void (*fn)(void *data), void *data)
423 {
424 struct ieee80211_hw *hw = &local->hw;
425 struct sk_buff *skb;
426 unsigned long flags;
427 int queue, i;
428
429 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
430 while ((skb = skb_dequeue(skbs))) {
431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432
433 if (WARN_ON(!info->control.vif)) {
434 ieee80211_free_txskb(&local->hw, skb);
435 continue;
436 }
437
438 queue = info->hw_queue;
439
440 __ieee80211_stop_queue(hw, queue,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
442
443 __skb_queue_tail(&local->pending[queue], skb);
444 }
445
446 if (fn)
447 fn(data);
448
449 for (i = 0; i < hw->queues; i++)
450 __ieee80211_wake_queue(hw, i,
451 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
452 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
453 }
454
455 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
456 unsigned long queues,
457 enum queue_stop_reason reason)
458 {
459 struct ieee80211_local *local = hw_to_local(hw);
460 unsigned long flags;
461 int i;
462
463 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
464
465 for_each_set_bit(i, &queues, hw->queues)
466 __ieee80211_stop_queue(hw, i, reason);
467
468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
469 }
470
471 void ieee80211_stop_queues(struct ieee80211_hw *hw)
472 {
473 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
474 IEEE80211_QUEUE_STOP_REASON_DRIVER);
475 }
476 EXPORT_SYMBOL(ieee80211_stop_queues);
477
478 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
479 {
480 struct ieee80211_local *local = hw_to_local(hw);
481 unsigned long flags;
482 int ret;
483
484 if (WARN_ON(queue >= hw->queues))
485 return true;
486
487 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
488 ret = !!local->queue_stop_reasons[queue];
489 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
490 return ret;
491 }
492 EXPORT_SYMBOL(ieee80211_queue_stopped);
493
494 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
495 unsigned long queues,
496 enum queue_stop_reason reason)
497 {
498 struct ieee80211_local *local = hw_to_local(hw);
499 unsigned long flags;
500 int i;
501
502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503
504 for_each_set_bit(i, &queues, hw->queues)
505 __ieee80211_wake_queue(hw, i, reason);
506
507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508 }
509
510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
511 {
512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513 IEEE80211_QUEUE_STOP_REASON_DRIVER);
514 }
515 EXPORT_SYMBOL(ieee80211_wake_queues);
516
517 void ieee80211_flush_queues(struct ieee80211_local *local,
518 struct ieee80211_sub_if_data *sdata)
519 {
520 u32 queues;
521
522 if (!local->ops->flush)
523 return;
524
525 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
526 int ac;
527
528 queues = 0;
529
530 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
531 queues |= BIT(sdata->vif.hw_queue[ac]);
532 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
533 queues |= BIT(sdata->vif.cab_queue);
534 } else {
535 /* all queues */
536 queues = BIT(local->hw.queues) - 1;
537 }
538
539 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
540 IEEE80211_QUEUE_STOP_REASON_FLUSH);
541
542 drv_flush(local, queues, false);
543
544 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
545 IEEE80211_QUEUE_STOP_REASON_FLUSH);
546 }
547
548 void ieee80211_iterate_active_interfaces(
549 struct ieee80211_hw *hw, u32 iter_flags,
550 void (*iterator)(void *data, u8 *mac,
551 struct ieee80211_vif *vif),
552 void *data)
553 {
554 struct ieee80211_local *local = hw_to_local(hw);
555 struct ieee80211_sub_if_data *sdata;
556
557 mutex_lock(&local->iflist_mtx);
558
559 list_for_each_entry(sdata, &local->interfaces, list) {
560 switch (sdata->vif.type) {
561 case NL80211_IFTYPE_MONITOR:
562 case NL80211_IFTYPE_AP_VLAN:
563 continue;
564 default:
565 break;
566 }
567 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
568 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
569 continue;
570 if (ieee80211_sdata_running(sdata))
571 iterator(data, sdata->vif.addr,
572 &sdata->vif);
573 }
574
575 sdata = rcu_dereference_protected(local->monitor_sdata,
576 lockdep_is_held(&local->iflist_mtx));
577 if (sdata &&
578 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
579 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
580 iterator(data, sdata->vif.addr, &sdata->vif);
581
582 mutex_unlock(&local->iflist_mtx);
583 }
584 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
585
586 void ieee80211_iterate_active_interfaces_atomic(
587 struct ieee80211_hw *hw, u32 iter_flags,
588 void (*iterator)(void *data, u8 *mac,
589 struct ieee80211_vif *vif),
590 void *data)
591 {
592 struct ieee80211_local *local = hw_to_local(hw);
593 struct ieee80211_sub_if_data *sdata;
594
595 rcu_read_lock();
596
597 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
598 switch (sdata->vif.type) {
599 case NL80211_IFTYPE_MONITOR:
600 case NL80211_IFTYPE_AP_VLAN:
601 continue;
602 default:
603 break;
604 }
605 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
606 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
607 continue;
608 if (ieee80211_sdata_running(sdata))
609 iterator(data, sdata->vif.addr,
610 &sdata->vif);
611 }
612
613 sdata = rcu_dereference(local->monitor_sdata);
614 if (sdata &&
615 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
616 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
617 iterator(data, sdata->vif.addr, &sdata->vif);
618
619 rcu_read_unlock();
620 }
621 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
622
623 /*
624 * Nothing should have been stuffed into the workqueue during
625 * the suspend->resume cycle. If this WARN is seen then there
626 * is a bug with either the driver suspend or something in
627 * mac80211 stuffing into the workqueue which we haven't yet
628 * cleared during mac80211's suspend cycle.
629 */
630 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
631 {
632 if (WARN(local->suspended && !local->resuming,
633 "queueing ieee80211 work while going to suspend\n"))
634 return false;
635
636 return true;
637 }
638
639 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
640 {
641 struct ieee80211_local *local = hw_to_local(hw);
642
643 if (!ieee80211_can_queue_work(local))
644 return;
645
646 queue_work(local->workqueue, work);
647 }
648 EXPORT_SYMBOL(ieee80211_queue_work);
649
650 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
651 struct delayed_work *dwork,
652 unsigned long delay)
653 {
654 struct ieee80211_local *local = hw_to_local(hw);
655
656 if (!ieee80211_can_queue_work(local))
657 return;
658
659 queue_delayed_work(local->workqueue, dwork, delay);
660 }
661 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
662
663 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
664 struct ieee802_11_elems *elems,
665 u64 filter, u32 crc)
666 {
667 size_t left = len;
668 u8 *pos = start;
669 bool calc_crc = filter != 0;
670 DECLARE_BITMAP(seen_elems, 256);
671
672 bitmap_zero(seen_elems, 256);
673 memset(elems, 0, sizeof(*elems));
674 elems->ie_start = start;
675 elems->total_len = len;
676
677 while (left >= 2) {
678 u8 id, elen;
679 bool elem_parse_failed;
680
681 id = *pos++;
682 elen = *pos++;
683 left -= 2;
684
685 if (elen > left) {
686 elems->parse_error = true;
687 break;
688 }
689
690 switch (id) {
691 case WLAN_EID_SSID:
692 case WLAN_EID_SUPP_RATES:
693 case WLAN_EID_FH_PARAMS:
694 case WLAN_EID_DS_PARAMS:
695 case WLAN_EID_CF_PARAMS:
696 case WLAN_EID_TIM:
697 case WLAN_EID_IBSS_PARAMS:
698 case WLAN_EID_CHALLENGE:
699 case WLAN_EID_RSN:
700 case WLAN_EID_ERP_INFO:
701 case WLAN_EID_EXT_SUPP_RATES:
702 case WLAN_EID_HT_CAPABILITY:
703 case WLAN_EID_HT_OPERATION:
704 case WLAN_EID_VHT_CAPABILITY:
705 case WLAN_EID_VHT_OPERATION:
706 case WLAN_EID_MESH_ID:
707 case WLAN_EID_MESH_CONFIG:
708 case WLAN_EID_PEER_MGMT:
709 case WLAN_EID_PREQ:
710 case WLAN_EID_PREP:
711 case WLAN_EID_PERR:
712 case WLAN_EID_RANN:
713 case WLAN_EID_CHANNEL_SWITCH:
714 case WLAN_EID_EXT_CHANSWITCH_ANN:
715 case WLAN_EID_COUNTRY:
716 case WLAN_EID_PWR_CONSTRAINT:
717 case WLAN_EID_TIMEOUT_INTERVAL:
718 if (test_bit(id, seen_elems)) {
719 elems->parse_error = true;
720 left -= elen;
721 pos += elen;
722 continue;
723 }
724 break;
725 }
726
727 if (calc_crc && id < 64 && (filter & (1ULL << id)))
728 crc = crc32_be(crc, pos - 2, elen + 2);
729
730 elem_parse_failed = false;
731
732 switch (id) {
733 case WLAN_EID_SSID:
734 elems->ssid = pos;
735 elems->ssid_len = elen;
736 break;
737 case WLAN_EID_SUPP_RATES:
738 elems->supp_rates = pos;
739 elems->supp_rates_len = elen;
740 break;
741 case WLAN_EID_FH_PARAMS:
742 elems->fh_params = pos;
743 elems->fh_params_len = elen;
744 break;
745 case WLAN_EID_DS_PARAMS:
746 elems->ds_params = pos;
747 elems->ds_params_len = elen;
748 break;
749 case WLAN_EID_CF_PARAMS:
750 elems->cf_params = pos;
751 elems->cf_params_len = elen;
752 break;
753 case WLAN_EID_TIM:
754 if (elen >= sizeof(struct ieee80211_tim_ie)) {
755 elems->tim = (void *)pos;
756 elems->tim_len = elen;
757 } else
758 elem_parse_failed = true;
759 break;
760 case WLAN_EID_IBSS_PARAMS:
761 elems->ibss_params = pos;
762 elems->ibss_params_len = elen;
763 break;
764 case WLAN_EID_CHALLENGE:
765 elems->challenge = pos;
766 elems->challenge_len = elen;
767 break;
768 case WLAN_EID_VENDOR_SPECIFIC:
769 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
770 pos[2] == 0xf2) {
771 /* Microsoft OUI (00:50:F2) */
772
773 if (calc_crc)
774 crc = crc32_be(crc, pos - 2, elen + 2);
775
776 if (elen >= 5 && pos[3] == 2) {
777 /* OUI Type 2 - WMM IE */
778 if (pos[4] == 0) {
779 elems->wmm_info = pos;
780 elems->wmm_info_len = elen;
781 } else if (pos[4] == 1) {
782 elems->wmm_param = pos;
783 elems->wmm_param_len = elen;
784 }
785 }
786 }
787 break;
788 case WLAN_EID_RSN:
789 elems->rsn = pos;
790 elems->rsn_len = elen;
791 break;
792 case WLAN_EID_ERP_INFO:
793 elems->erp_info = pos;
794 elems->erp_info_len = elen;
795 break;
796 case WLAN_EID_EXT_SUPP_RATES:
797 elems->ext_supp_rates = pos;
798 elems->ext_supp_rates_len = elen;
799 break;
800 case WLAN_EID_HT_CAPABILITY:
801 if (elen >= sizeof(struct ieee80211_ht_cap))
802 elems->ht_cap_elem = (void *)pos;
803 else
804 elem_parse_failed = true;
805 break;
806 case WLAN_EID_HT_OPERATION:
807 if (elen >= sizeof(struct ieee80211_ht_operation))
808 elems->ht_operation = (void *)pos;
809 else
810 elem_parse_failed = true;
811 break;
812 case WLAN_EID_VHT_CAPABILITY:
813 if (elen >= sizeof(struct ieee80211_vht_cap))
814 elems->vht_cap_elem = (void *)pos;
815 else
816 elem_parse_failed = true;
817 break;
818 case WLAN_EID_VHT_OPERATION:
819 if (elen >= sizeof(struct ieee80211_vht_operation))
820 elems->vht_operation = (void *)pos;
821 else
822 elem_parse_failed = true;
823 break;
824 case WLAN_EID_OPMODE_NOTIF:
825 if (elen > 0)
826 elems->opmode_notif = pos;
827 else
828 elem_parse_failed = true;
829 break;
830 case WLAN_EID_MESH_ID:
831 elems->mesh_id = pos;
832 elems->mesh_id_len = elen;
833 break;
834 case WLAN_EID_MESH_CONFIG:
835 if (elen >= sizeof(struct ieee80211_meshconf_ie))
836 elems->mesh_config = (void *)pos;
837 else
838 elem_parse_failed = true;
839 break;
840 case WLAN_EID_PEER_MGMT:
841 elems->peering = pos;
842 elems->peering_len = elen;
843 break;
844 case WLAN_EID_MESH_AWAKE_WINDOW:
845 if (elen >= 2)
846 elems->awake_window = (void *)pos;
847 break;
848 case WLAN_EID_PREQ:
849 elems->preq = pos;
850 elems->preq_len = elen;
851 break;
852 case WLAN_EID_PREP:
853 elems->prep = pos;
854 elems->prep_len = elen;
855 break;
856 case WLAN_EID_PERR:
857 elems->perr = pos;
858 elems->perr_len = elen;
859 break;
860 case WLAN_EID_RANN:
861 if (elen >= sizeof(struct ieee80211_rann_ie))
862 elems->rann = (void *)pos;
863 else
864 elem_parse_failed = true;
865 break;
866 case WLAN_EID_CHANNEL_SWITCH:
867 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
868 elem_parse_failed = true;
869 break;
870 }
871 elems->ch_switch_ie = (void *)pos;
872 break;
873 case WLAN_EID_QUIET:
874 if (!elems->quiet_elem) {
875 elems->quiet_elem = pos;
876 elems->quiet_elem_len = elen;
877 }
878 elems->num_of_quiet_elem++;
879 break;
880 case WLAN_EID_COUNTRY:
881 elems->country_elem = pos;
882 elems->country_elem_len = elen;
883 break;
884 case WLAN_EID_PWR_CONSTRAINT:
885 if (elen != 1) {
886 elem_parse_failed = true;
887 break;
888 }
889 elems->pwr_constr_elem = pos;
890 break;
891 case WLAN_EID_TIMEOUT_INTERVAL:
892 elems->timeout_int = pos;
893 elems->timeout_int_len = elen;
894 break;
895 default:
896 break;
897 }
898
899 if (elem_parse_failed)
900 elems->parse_error = true;
901 else
902 __set_bit(id, seen_elems);
903
904 left -= elen;
905 pos += elen;
906 }
907
908 if (left != 0)
909 elems->parse_error = true;
910
911 return crc;
912 }
913
914 void ieee802_11_parse_elems(u8 *start, size_t len,
915 struct ieee802_11_elems *elems)
916 {
917 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
918 }
919
920 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
921 bool bss_notify)
922 {
923 struct ieee80211_local *local = sdata->local;
924 struct ieee80211_tx_queue_params qparam;
925 struct ieee80211_chanctx_conf *chanctx_conf;
926 int ac;
927 bool use_11b, enable_qos;
928 int aCWmin, aCWmax;
929
930 if (!local->ops->conf_tx)
931 return;
932
933 if (local->hw.queues < IEEE80211_NUM_ACS)
934 return;
935
936 memset(&qparam, 0, sizeof(qparam));
937
938 rcu_read_lock();
939 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
940 use_11b = (chanctx_conf &&
941 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
942 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
943 rcu_read_unlock();
944
945 /*
946 * By default disable QoS in STA mode for old access points, which do
947 * not support 802.11e. New APs will provide proper queue parameters,
948 * that we will configure later.
949 */
950 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
951
952 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
953 /* Set defaults according to 802.11-2007 Table 7-37 */
954 aCWmax = 1023;
955 if (use_11b)
956 aCWmin = 31;
957 else
958 aCWmin = 15;
959
960 if (enable_qos) {
961 switch (ac) {
962 case IEEE80211_AC_BK:
963 qparam.cw_max = aCWmax;
964 qparam.cw_min = aCWmin;
965 qparam.txop = 0;
966 qparam.aifs = 7;
967 break;
968 /* never happens but let's not leave undefined */
969 default:
970 case IEEE80211_AC_BE:
971 qparam.cw_max = aCWmax;
972 qparam.cw_min = aCWmin;
973 qparam.txop = 0;
974 qparam.aifs = 3;
975 break;
976 case IEEE80211_AC_VI:
977 qparam.cw_max = aCWmin;
978 qparam.cw_min = (aCWmin + 1) / 2 - 1;
979 if (use_11b)
980 qparam.txop = 6016/32;
981 else
982 qparam.txop = 3008/32;
983 qparam.aifs = 2;
984 break;
985 case IEEE80211_AC_VO:
986 qparam.cw_max = (aCWmin + 1) / 2 - 1;
987 qparam.cw_min = (aCWmin + 1) / 4 - 1;
988 if (use_11b)
989 qparam.txop = 3264/32;
990 else
991 qparam.txop = 1504/32;
992 qparam.aifs = 2;
993 break;
994 }
995 } else {
996 /* Confiure old 802.11b/g medium access rules. */
997 qparam.cw_max = aCWmax;
998 qparam.cw_min = aCWmin;
999 qparam.txop = 0;
1000 qparam.aifs = 2;
1001 }
1002
1003 qparam.uapsd = false;
1004
1005 sdata->tx_conf[ac] = qparam;
1006 drv_conf_tx(local, sdata, ac, &qparam);
1007 }
1008
1009 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1010 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1011 sdata->vif.bss_conf.qos = enable_qos;
1012 if (bss_notify)
1013 ieee80211_bss_info_change_notify(sdata,
1014 BSS_CHANGED_QOS);
1015 }
1016 }
1017
1018 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1019 const size_t supp_rates_len,
1020 const u8 *supp_rates)
1021 {
1022 struct ieee80211_chanctx_conf *chanctx_conf;
1023 int i, have_higher_than_11mbit = 0;
1024
1025 /* cf. IEEE 802.11 9.2.12 */
1026 for (i = 0; i < supp_rates_len; i++)
1027 if ((supp_rates[i] & 0x7f) * 5 > 110)
1028 have_higher_than_11mbit = 1;
1029
1030 rcu_read_lock();
1031 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1032
1033 if (chanctx_conf &&
1034 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
1035 have_higher_than_11mbit)
1036 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1037 else
1038 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1039 rcu_read_unlock();
1040
1041 ieee80211_set_wmm_default(sdata, true);
1042 }
1043
1044 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1045 enum ieee80211_band band)
1046 {
1047 struct ieee80211_supported_band *sband;
1048 struct ieee80211_rate *bitrates;
1049 u32 mandatory_rates;
1050 enum ieee80211_rate_flags mandatory_flag;
1051 int i;
1052
1053 sband = local->hw.wiphy->bands[band];
1054 if (WARN_ON(!sband))
1055 return 1;
1056
1057 if (band == IEEE80211_BAND_2GHZ)
1058 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1059 else
1060 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1061
1062 bitrates = sband->bitrates;
1063 mandatory_rates = 0;
1064 for (i = 0; i < sband->n_bitrates; i++)
1065 if (bitrates[i].flags & mandatory_flag)
1066 mandatory_rates |= BIT(i);
1067 return mandatory_rates;
1068 }
1069
1070 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1071 u16 transaction, u16 auth_alg, u16 status,
1072 const u8 *extra, size_t extra_len, const u8 *da,
1073 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1074 u32 tx_flags)
1075 {
1076 struct ieee80211_local *local = sdata->local;
1077 struct sk_buff *skb;
1078 struct ieee80211_mgmt *mgmt;
1079 int err;
1080
1081 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1082 sizeof(*mgmt) + 6 + extra_len);
1083 if (!skb)
1084 return;
1085
1086 skb_reserve(skb, local->hw.extra_tx_headroom);
1087
1088 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1089 memset(mgmt, 0, 24 + 6);
1090 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1091 IEEE80211_STYPE_AUTH);
1092 memcpy(mgmt->da, da, ETH_ALEN);
1093 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1094 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1095 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1096 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1097 mgmt->u.auth.status_code = cpu_to_le16(status);
1098 if (extra)
1099 memcpy(skb_put(skb, extra_len), extra, extra_len);
1100
1101 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1102 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1103 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1104 WARN_ON(err);
1105 }
1106
1107 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1108 tx_flags;
1109 ieee80211_tx_skb(sdata, skb);
1110 }
1111
1112 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1113 const u8 *bssid, u16 stype, u16 reason,
1114 bool send_frame, u8 *frame_buf)
1115 {
1116 struct ieee80211_local *local = sdata->local;
1117 struct sk_buff *skb;
1118 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1119
1120 /* build frame */
1121 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1122 mgmt->duration = 0; /* initialize only */
1123 mgmt->seq_ctrl = 0; /* initialize only */
1124 memcpy(mgmt->da, bssid, ETH_ALEN);
1125 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1126 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1127 /* u.deauth.reason_code == u.disassoc.reason_code */
1128 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1129
1130 if (send_frame) {
1131 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1132 IEEE80211_DEAUTH_FRAME_LEN);
1133 if (!skb)
1134 return;
1135
1136 skb_reserve(skb, local->hw.extra_tx_headroom);
1137
1138 /* copy in frame */
1139 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1140 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1141
1142 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1143 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1144 IEEE80211_SKB_CB(skb)->flags |=
1145 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1146
1147 ieee80211_tx_skb(sdata, skb);
1148 }
1149 }
1150
1151 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1152 size_t buffer_len, const u8 *ie, size_t ie_len,
1153 enum ieee80211_band band, u32 rate_mask,
1154 u8 channel)
1155 {
1156 struct ieee80211_supported_band *sband;
1157 u8 *pos = buffer, *end = buffer + buffer_len;
1158 size_t offset = 0, noffset;
1159 int supp_rates_len, i;
1160 u8 rates[32];
1161 int num_rates;
1162 int ext_rates_len;
1163
1164 sband = local->hw.wiphy->bands[band];
1165 if (WARN_ON_ONCE(!sband))
1166 return 0;
1167
1168 num_rates = 0;
1169 for (i = 0; i < sband->n_bitrates; i++) {
1170 if ((BIT(i) & rate_mask) == 0)
1171 continue; /* skip rate */
1172 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1173 }
1174
1175 supp_rates_len = min_t(int, num_rates, 8);
1176
1177 if (end - pos < 2 + supp_rates_len)
1178 goto out_err;
1179 *pos++ = WLAN_EID_SUPP_RATES;
1180 *pos++ = supp_rates_len;
1181 memcpy(pos, rates, supp_rates_len);
1182 pos += supp_rates_len;
1183
1184 /* insert "request information" if in custom IEs */
1185 if (ie && ie_len) {
1186 static const u8 before_extrates[] = {
1187 WLAN_EID_SSID,
1188 WLAN_EID_SUPP_RATES,
1189 WLAN_EID_REQUEST,
1190 };
1191 noffset = ieee80211_ie_split(ie, ie_len,
1192 before_extrates,
1193 ARRAY_SIZE(before_extrates),
1194 offset);
1195 if (end - pos < noffset - offset)
1196 goto out_err;
1197 memcpy(pos, ie + offset, noffset - offset);
1198 pos += noffset - offset;
1199 offset = noffset;
1200 }
1201
1202 ext_rates_len = num_rates - supp_rates_len;
1203 if (ext_rates_len > 0) {
1204 if (end - pos < 2 + ext_rates_len)
1205 goto out_err;
1206 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1207 *pos++ = ext_rates_len;
1208 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1209 pos += ext_rates_len;
1210 }
1211
1212 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1213 if (end - pos < 3)
1214 goto out_err;
1215 *pos++ = WLAN_EID_DS_PARAMS;
1216 *pos++ = 1;
1217 *pos++ = channel;
1218 }
1219
1220 /* insert custom IEs that go before HT */
1221 if (ie && ie_len) {
1222 static const u8 before_ht[] = {
1223 WLAN_EID_SSID,
1224 WLAN_EID_SUPP_RATES,
1225 WLAN_EID_REQUEST,
1226 WLAN_EID_EXT_SUPP_RATES,
1227 WLAN_EID_DS_PARAMS,
1228 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1229 };
1230 noffset = ieee80211_ie_split(ie, ie_len,
1231 before_ht, ARRAY_SIZE(before_ht),
1232 offset);
1233 if (end - pos < noffset - offset)
1234 goto out_err;
1235 memcpy(pos, ie + offset, noffset - offset);
1236 pos += noffset - offset;
1237 offset = noffset;
1238 }
1239
1240 if (sband->ht_cap.ht_supported) {
1241 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1242 goto out_err;
1243 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1244 sband->ht_cap.cap);
1245 }
1246
1247 /*
1248 * If adding more here, adjust code in main.c
1249 * that calculates local->scan_ies_len.
1250 */
1251
1252 /* add any remaining custom IEs */
1253 if (ie && ie_len) {
1254 noffset = ie_len;
1255 if (end - pos < noffset - offset)
1256 goto out_err;
1257 memcpy(pos, ie + offset, noffset - offset);
1258 pos += noffset - offset;
1259 }
1260
1261 if (sband->vht_cap.vht_supported) {
1262 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1263 goto out_err;
1264 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1265 sband->vht_cap.cap);
1266 }
1267
1268 return pos - buffer;
1269 out_err:
1270 WARN_ONCE(1, "not enough space for preq IEs\n");
1271 return pos - buffer;
1272 }
1273
1274 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1275 u8 *dst, u32 ratemask,
1276 struct ieee80211_channel *chan,
1277 const u8 *ssid, size_t ssid_len,
1278 const u8 *ie, size_t ie_len,
1279 bool directed)
1280 {
1281 struct ieee80211_local *local = sdata->local;
1282 struct sk_buff *skb;
1283 struct ieee80211_mgmt *mgmt;
1284 u8 chan_no;
1285 int ies_len;
1286
1287 /*
1288 * Do not send DS Channel parameter for directed probe requests
1289 * in order to maximize the chance that we get a response. Some
1290 * badly-behaved APs don't respond when this parameter is included.
1291 */
1292 if (directed)
1293 chan_no = 0;
1294 else
1295 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1296
1297 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1298 ssid, ssid_len, 100 + ie_len);
1299 if (!skb)
1300 return NULL;
1301
1302 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1303 skb_tailroom(skb),
1304 ie, ie_len, chan->band,
1305 ratemask, chan_no);
1306 skb_put(skb, ies_len);
1307
1308 if (dst) {
1309 mgmt = (struct ieee80211_mgmt *) skb->data;
1310 memcpy(mgmt->da, dst, ETH_ALEN);
1311 memcpy(mgmt->bssid, dst, ETH_ALEN);
1312 }
1313
1314 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1315
1316 return skb;
1317 }
1318
1319 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1320 const u8 *ssid, size_t ssid_len,
1321 const u8 *ie, size_t ie_len,
1322 u32 ratemask, bool directed, u32 tx_flags,
1323 struct ieee80211_channel *channel, bool scan)
1324 {
1325 struct sk_buff *skb;
1326
1327 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1328 ssid, ssid_len,
1329 ie, ie_len, directed);
1330 if (skb) {
1331 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1332 if (scan)
1333 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1334 else
1335 ieee80211_tx_skb(sdata, skb);
1336 }
1337 }
1338
1339 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1340 struct ieee802_11_elems *elems,
1341 enum ieee80211_band band, u32 *basic_rates)
1342 {
1343 struct ieee80211_supported_band *sband;
1344 struct ieee80211_rate *bitrates;
1345 size_t num_rates;
1346 u32 supp_rates;
1347 int i, j;
1348 sband = local->hw.wiphy->bands[band];
1349
1350 if (WARN_ON(!sband))
1351 return 1;
1352
1353 bitrates = sband->bitrates;
1354 num_rates = sband->n_bitrates;
1355 supp_rates = 0;
1356 for (i = 0; i < elems->supp_rates_len +
1357 elems->ext_supp_rates_len; i++) {
1358 u8 rate = 0;
1359 int own_rate;
1360 bool is_basic;
1361 if (i < elems->supp_rates_len)
1362 rate = elems->supp_rates[i];
1363 else if (elems->ext_supp_rates)
1364 rate = elems->ext_supp_rates
1365 [i - elems->supp_rates_len];
1366 own_rate = 5 * (rate & 0x7f);
1367 is_basic = !!(rate & 0x80);
1368
1369 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1370 continue;
1371
1372 for (j = 0; j < num_rates; j++) {
1373 if (bitrates[j].bitrate == own_rate) {
1374 supp_rates |= BIT(j);
1375 if (basic_rates && is_basic)
1376 *basic_rates |= BIT(j);
1377 }
1378 }
1379 }
1380 return supp_rates;
1381 }
1382
1383 void ieee80211_stop_device(struct ieee80211_local *local)
1384 {
1385 ieee80211_led_radio(local, false);
1386 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1387
1388 cancel_work_sync(&local->reconfig_filter);
1389
1390 flush_workqueue(local->workqueue);
1391 drv_stop(local);
1392 }
1393
1394 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1395 struct ieee80211_sub_if_data *sdata)
1396 {
1397 struct ieee80211_chanctx_conf *conf;
1398 struct ieee80211_chanctx *ctx;
1399
1400 if (!local->use_chanctx)
1401 return;
1402
1403 mutex_lock(&local->chanctx_mtx);
1404 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1405 lockdep_is_held(&local->chanctx_mtx));
1406 if (conf) {
1407 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1408 drv_assign_vif_chanctx(local, sdata, ctx);
1409 }
1410 mutex_unlock(&local->chanctx_mtx);
1411 }
1412
1413 int ieee80211_reconfig(struct ieee80211_local *local)
1414 {
1415 struct ieee80211_hw *hw = &local->hw;
1416 struct ieee80211_sub_if_data *sdata;
1417 struct ieee80211_chanctx *ctx;
1418 struct sta_info *sta;
1419 int res, i;
1420 bool reconfig_due_to_wowlan = false;
1421
1422 #ifdef CONFIG_PM
1423 if (local->suspended)
1424 local->resuming = true;
1425
1426 if (local->wowlan) {
1427 local->wowlan = false;
1428 res = drv_resume(local);
1429 if (res < 0) {
1430 local->resuming = false;
1431 return res;
1432 }
1433 if (res == 0)
1434 goto wake_up;
1435 WARN_ON(res > 1);
1436 /*
1437 * res is 1, which means the driver requested
1438 * to go through a regular reset on wakeup.
1439 */
1440 reconfig_due_to_wowlan = true;
1441 }
1442 #endif
1443 /* everything else happens only if HW was up & running */
1444 if (!local->open_count)
1445 goto wake_up;
1446
1447 /*
1448 * Upon resume hardware can sometimes be goofy due to
1449 * various platform / driver / bus issues, so restarting
1450 * the device may at times not work immediately. Propagate
1451 * the error.
1452 */
1453 res = drv_start(local);
1454 if (res) {
1455 WARN(local->suspended, "Hardware became unavailable "
1456 "upon resume. This could be a software issue "
1457 "prior to suspend or a hardware issue.\n");
1458 return res;
1459 }
1460
1461 /* setup fragmentation threshold */
1462 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1463
1464 /* setup RTS threshold */
1465 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1466
1467 /* reset coverage class */
1468 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1469
1470 ieee80211_led_radio(local, true);
1471 ieee80211_mod_tpt_led_trig(local,
1472 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1473
1474 /* add interfaces */
1475 sdata = rtnl_dereference(local->monitor_sdata);
1476 if (sdata) {
1477 res = drv_add_interface(local, sdata);
1478 if (WARN_ON(res)) {
1479 rcu_assign_pointer(local->monitor_sdata, NULL);
1480 synchronize_net();
1481 kfree(sdata);
1482 }
1483 }
1484
1485 list_for_each_entry(sdata, &local->interfaces, list) {
1486 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1487 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1488 ieee80211_sdata_running(sdata))
1489 res = drv_add_interface(local, sdata);
1490 }
1491
1492 /* add channel contexts */
1493 if (local->use_chanctx) {
1494 mutex_lock(&local->chanctx_mtx);
1495 list_for_each_entry(ctx, &local->chanctx_list, list)
1496 WARN_ON(drv_add_chanctx(local, ctx));
1497 mutex_unlock(&local->chanctx_mtx);
1498 }
1499
1500 list_for_each_entry(sdata, &local->interfaces, list) {
1501 if (!ieee80211_sdata_running(sdata))
1502 continue;
1503 ieee80211_assign_chanctx(local, sdata);
1504 }
1505
1506 sdata = rtnl_dereference(local->monitor_sdata);
1507 if (sdata && ieee80211_sdata_running(sdata))
1508 ieee80211_assign_chanctx(local, sdata);
1509
1510 /* add STAs back */
1511 mutex_lock(&local->sta_mtx);
1512 list_for_each_entry(sta, &local->sta_list, list) {
1513 enum ieee80211_sta_state state;
1514
1515 if (!sta->uploaded)
1516 continue;
1517
1518 /* AP-mode stations will be added later */
1519 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1520 continue;
1521
1522 for (state = IEEE80211_STA_NOTEXIST;
1523 state < sta->sta_state; state++)
1524 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1525 state + 1));
1526 }
1527 mutex_unlock(&local->sta_mtx);
1528
1529 /* reconfigure tx conf */
1530 if (hw->queues >= IEEE80211_NUM_ACS) {
1531 list_for_each_entry(sdata, &local->interfaces, list) {
1532 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1533 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1534 !ieee80211_sdata_running(sdata))
1535 continue;
1536
1537 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1538 drv_conf_tx(local, sdata, i,
1539 &sdata->tx_conf[i]);
1540 }
1541 }
1542
1543 /* reconfigure hardware */
1544 ieee80211_hw_config(local, ~0);
1545
1546 ieee80211_configure_filter(local);
1547
1548 /* Finally also reconfigure all the BSS information */
1549 list_for_each_entry(sdata, &local->interfaces, list) {
1550 u32 changed;
1551
1552 if (!ieee80211_sdata_running(sdata))
1553 continue;
1554
1555 /* common change flags for all interface types */
1556 changed = BSS_CHANGED_ERP_CTS_PROT |
1557 BSS_CHANGED_ERP_PREAMBLE |
1558 BSS_CHANGED_ERP_SLOT |
1559 BSS_CHANGED_HT |
1560 BSS_CHANGED_BASIC_RATES |
1561 BSS_CHANGED_BEACON_INT |
1562 BSS_CHANGED_BSSID |
1563 BSS_CHANGED_CQM |
1564 BSS_CHANGED_QOS |
1565 BSS_CHANGED_IDLE |
1566 BSS_CHANGED_TXPOWER;
1567
1568 switch (sdata->vif.type) {
1569 case NL80211_IFTYPE_STATION:
1570 changed |= BSS_CHANGED_ASSOC |
1571 BSS_CHANGED_ARP_FILTER |
1572 BSS_CHANGED_PS;
1573
1574 if (sdata->u.mgd.dtim_period)
1575 changed |= BSS_CHANGED_DTIM_PERIOD;
1576
1577 mutex_lock(&sdata->u.mgd.mtx);
1578 ieee80211_bss_info_change_notify(sdata, changed);
1579 mutex_unlock(&sdata->u.mgd.mtx);
1580 break;
1581 case NL80211_IFTYPE_ADHOC:
1582 changed |= BSS_CHANGED_IBSS;
1583 /* fall through */
1584 case NL80211_IFTYPE_AP:
1585 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1586
1587 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1588 changed |= BSS_CHANGED_AP_PROBE_RESP;
1589
1590 if (rcu_access_pointer(sdata->u.ap.beacon))
1591 drv_start_ap(local, sdata);
1592 }
1593
1594 /* fall through */
1595 case NL80211_IFTYPE_MESH_POINT:
1596 if (sdata->vif.bss_conf.enable_beacon) {
1597 changed |= BSS_CHANGED_BEACON |
1598 BSS_CHANGED_BEACON_ENABLED;
1599 ieee80211_bss_info_change_notify(sdata, changed);
1600 }
1601 break;
1602 case NL80211_IFTYPE_WDS:
1603 break;
1604 case NL80211_IFTYPE_AP_VLAN:
1605 case NL80211_IFTYPE_MONITOR:
1606 /* ignore virtual */
1607 break;
1608 case NL80211_IFTYPE_P2P_DEVICE:
1609 changed = BSS_CHANGED_IDLE;
1610 break;
1611 case NL80211_IFTYPE_UNSPECIFIED:
1612 case NUM_NL80211_IFTYPES:
1613 case NL80211_IFTYPE_P2P_CLIENT:
1614 case NL80211_IFTYPE_P2P_GO:
1615 WARN_ON(1);
1616 break;
1617 }
1618 }
1619
1620 ieee80211_recalc_ps(local, -1);
1621
1622 /*
1623 * The sta might be in psm against the ap (e.g. because
1624 * this was the state before a hw restart), so we
1625 * explicitly send a null packet in order to make sure
1626 * it'll sync against the ap (and get out of psm).
1627 */
1628 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1629 list_for_each_entry(sdata, &local->interfaces, list) {
1630 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1631 continue;
1632 if (!sdata->u.mgd.associated)
1633 continue;
1634
1635 ieee80211_send_nullfunc(local, sdata, 0);
1636 }
1637 }
1638
1639 /* APs are now beaconing, add back stations */
1640 mutex_lock(&local->sta_mtx);
1641 list_for_each_entry(sta, &local->sta_list, list) {
1642 enum ieee80211_sta_state state;
1643
1644 if (!sta->uploaded)
1645 continue;
1646
1647 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1648 continue;
1649
1650 for (state = IEEE80211_STA_NOTEXIST;
1651 state < sta->sta_state; state++)
1652 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1653 state + 1));
1654 }
1655 mutex_unlock(&local->sta_mtx);
1656
1657 /* add back keys */
1658 list_for_each_entry(sdata, &local->interfaces, list)
1659 if (ieee80211_sdata_running(sdata))
1660 ieee80211_enable_keys(sdata);
1661
1662 wake_up:
1663 local->in_reconfig = false;
1664 barrier();
1665
1666 /*
1667 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1668 * sessions can be established after a resume.
1669 *
1670 * Also tear down aggregation sessions since reconfiguring
1671 * them in a hardware restart scenario is not easily done
1672 * right now, and the hardware will have lost information
1673 * about the sessions, but we and the AP still think they
1674 * are active. This is really a workaround though.
1675 */
1676 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1677 mutex_lock(&local->sta_mtx);
1678
1679 list_for_each_entry(sta, &local->sta_list, list) {
1680 ieee80211_sta_tear_down_BA_sessions(
1681 sta, AGG_STOP_LOCAL_REQUEST);
1682 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1683 }
1684
1685 mutex_unlock(&local->sta_mtx);
1686 }
1687
1688 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1689 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1690
1691 /*
1692 * If this is for hw restart things are still running.
1693 * We may want to change that later, however.
1694 */
1695 if (!local->suspended || reconfig_due_to_wowlan)
1696 drv_restart_complete(local);
1697
1698 if (!local->suspended)
1699 return 0;
1700
1701 #ifdef CONFIG_PM
1702 /* first set suspended false, then resuming */
1703 local->suspended = false;
1704 mb();
1705 local->resuming = false;
1706
1707 mod_timer(&local->sta_cleanup, jiffies + 1);
1708 #else
1709 WARN_ON(1);
1710 #endif
1711 return 0;
1712 }
1713
1714 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1715 {
1716 struct ieee80211_sub_if_data *sdata;
1717 struct ieee80211_local *local;
1718 struct ieee80211_key *key;
1719
1720 if (WARN_ON(!vif))
1721 return;
1722
1723 sdata = vif_to_sdata(vif);
1724 local = sdata->local;
1725
1726 if (WARN_ON(!local->resuming))
1727 return;
1728
1729 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1730 return;
1731
1732 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1733
1734 mutex_lock(&local->key_mtx);
1735 list_for_each_entry(key, &sdata->key_list, list)
1736 key->flags |= KEY_FLAG_TAINTED;
1737 mutex_unlock(&local->key_mtx);
1738 }
1739 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1740
1741 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1742 {
1743 struct ieee80211_local *local = sdata->local;
1744 struct ieee80211_chanctx_conf *chanctx_conf;
1745 struct ieee80211_chanctx *chanctx;
1746
1747 mutex_lock(&local->chanctx_mtx);
1748
1749 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1750 lockdep_is_held(&local->chanctx_mtx));
1751
1752 if (WARN_ON_ONCE(!chanctx_conf))
1753 goto unlock;
1754
1755 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1756 ieee80211_recalc_smps_chanctx(local, chanctx);
1757 unlock:
1758 mutex_unlock(&local->chanctx_mtx);
1759 }
1760
1761 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1762 {
1763 int i;
1764
1765 for (i = 0; i < n_ids; i++)
1766 if (ids[i] == id)
1767 return true;
1768 return false;
1769 }
1770
1771 /**
1772 * ieee80211_ie_split - split an IE buffer according to ordering
1773 *
1774 * @ies: the IE buffer
1775 * @ielen: the length of the IE buffer
1776 * @ids: an array with element IDs that are allowed before
1777 * the split
1778 * @n_ids: the size of the element ID array
1779 * @offset: offset where to start splitting in the buffer
1780 *
1781 * This function splits an IE buffer by updating the @offset
1782 * variable to point to the location where the buffer should be
1783 * split.
1784 *
1785 * It assumes that the given IE buffer is well-formed, this
1786 * has to be guaranteed by the caller!
1787 *
1788 * It also assumes that the IEs in the buffer are ordered
1789 * correctly, if not the result of using this function will not
1790 * be ordered correctly either, i.e. it does no reordering.
1791 *
1792 * The function returns the offset where the next part of the
1793 * buffer starts, which may be @ielen if the entire (remainder)
1794 * of the buffer should be used.
1795 */
1796 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1797 const u8 *ids, int n_ids, size_t offset)
1798 {
1799 size_t pos = offset;
1800
1801 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1802 pos += 2 + ies[pos + 1];
1803
1804 return pos;
1805 }
1806
1807 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1808 {
1809 size_t pos = offset;
1810
1811 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1812 pos += 2 + ies[pos + 1];
1813
1814 return pos;
1815 }
1816
1817 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1818 int rssi_min_thold,
1819 int rssi_max_thold)
1820 {
1821 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1822
1823 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1824 return;
1825
1826 /*
1827 * Scale up threshold values before storing it, as the RSSI averaging
1828 * algorithm uses a scaled up value as well. Change this scaling
1829 * factor if the RSSI averaging algorithm changes.
1830 */
1831 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1832 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1833 }
1834
1835 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1836 int rssi_min_thold,
1837 int rssi_max_thold)
1838 {
1839 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1840
1841 WARN_ON(rssi_min_thold == rssi_max_thold ||
1842 rssi_min_thold > rssi_max_thold);
1843
1844 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1845 rssi_max_thold);
1846 }
1847 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1848
1849 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1850 {
1851 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1852
1853 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1854 }
1855 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1856
1857 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1858 u16 cap)
1859 {
1860 __le16 tmp;
1861
1862 *pos++ = WLAN_EID_HT_CAPABILITY;
1863 *pos++ = sizeof(struct ieee80211_ht_cap);
1864 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1865
1866 /* capability flags */
1867 tmp = cpu_to_le16(cap);
1868 memcpy(pos, &tmp, sizeof(u16));
1869 pos += sizeof(u16);
1870
1871 /* AMPDU parameters */
1872 *pos++ = ht_cap->ampdu_factor |
1873 (ht_cap->ampdu_density <<
1874 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1875
1876 /* MCS set */
1877 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1878 pos += sizeof(ht_cap->mcs);
1879
1880 /* extended capabilities */
1881 pos += sizeof(__le16);
1882
1883 /* BF capabilities */
1884 pos += sizeof(__le32);
1885
1886 /* antenna selection */
1887 pos += sizeof(u8);
1888
1889 return pos;
1890 }
1891
1892 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1893 u32 cap)
1894 {
1895 __le32 tmp;
1896
1897 *pos++ = WLAN_EID_VHT_CAPABILITY;
1898 *pos++ = sizeof(struct ieee80211_vht_cap);
1899 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1900
1901 /* capability flags */
1902 tmp = cpu_to_le32(cap);
1903 memcpy(pos, &tmp, sizeof(u32));
1904 pos += sizeof(u32);
1905
1906 /* VHT MCS set */
1907 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1908 pos += sizeof(vht_cap->vht_mcs);
1909
1910 return pos;
1911 }
1912
1913 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1914 const struct cfg80211_chan_def *chandef,
1915 u16 prot_mode)
1916 {
1917 struct ieee80211_ht_operation *ht_oper;
1918 /* Build HT Information */
1919 *pos++ = WLAN_EID_HT_OPERATION;
1920 *pos++ = sizeof(struct ieee80211_ht_operation);
1921 ht_oper = (struct ieee80211_ht_operation *)pos;
1922 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1923 chandef->chan->center_freq);
1924 switch (chandef->width) {
1925 case NL80211_CHAN_WIDTH_160:
1926 case NL80211_CHAN_WIDTH_80P80:
1927 case NL80211_CHAN_WIDTH_80:
1928 case NL80211_CHAN_WIDTH_40:
1929 if (chandef->center_freq1 > chandef->chan->center_freq)
1930 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1931 else
1932 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1933 break;
1934 default:
1935 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1936 break;
1937 }
1938 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1939 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1940 chandef->width != NL80211_CHAN_WIDTH_20)
1941 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1942
1943 ht_oper->operation_mode = cpu_to_le16(prot_mode);
1944 ht_oper->stbc_param = 0x0000;
1945
1946 /* It seems that Basic MCS set and Supported MCS set
1947 are identical for the first 10 bytes */
1948 memset(&ht_oper->basic_set, 0, 16);
1949 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1950
1951 return pos + sizeof(struct ieee80211_ht_operation);
1952 }
1953
1954 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1955 const struct ieee80211_ht_operation *ht_oper,
1956 struct cfg80211_chan_def *chandef)
1957 {
1958 enum nl80211_channel_type channel_type;
1959
1960 if (!ht_oper) {
1961 cfg80211_chandef_create(chandef, control_chan,
1962 NL80211_CHAN_NO_HT);
1963 return;
1964 }
1965
1966 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1967 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1968 channel_type = NL80211_CHAN_HT20;
1969 break;
1970 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1971 channel_type = NL80211_CHAN_HT40PLUS;
1972 break;
1973 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1974 channel_type = NL80211_CHAN_HT40MINUS;
1975 break;
1976 default:
1977 channel_type = NL80211_CHAN_NO_HT;
1978 }
1979
1980 cfg80211_chandef_create(chandef, control_chan, channel_type);
1981 }
1982
1983 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1984 struct sk_buff *skb, bool need_basic,
1985 enum ieee80211_band band)
1986 {
1987 struct ieee80211_local *local = sdata->local;
1988 struct ieee80211_supported_band *sband;
1989 int rate;
1990 u8 i, rates, *pos;
1991 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1992
1993 sband = local->hw.wiphy->bands[band];
1994 rates = sband->n_bitrates;
1995 if (rates > 8)
1996 rates = 8;
1997
1998 if (skb_tailroom(skb) < rates + 2)
1999 return -ENOMEM;
2000
2001 pos = skb_put(skb, rates + 2);
2002 *pos++ = WLAN_EID_SUPP_RATES;
2003 *pos++ = rates;
2004 for (i = 0; i < rates; i++) {
2005 u8 basic = 0;
2006 if (need_basic && basic_rates & BIT(i))
2007 basic = 0x80;
2008 rate = sband->bitrates[i].bitrate;
2009 *pos++ = basic | (u8) (rate / 5);
2010 }
2011
2012 return 0;
2013 }
2014
2015 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2016 struct sk_buff *skb, bool need_basic,
2017 enum ieee80211_band band)
2018 {
2019 struct ieee80211_local *local = sdata->local;
2020 struct ieee80211_supported_band *sband;
2021 int rate;
2022 u8 i, exrates, *pos;
2023 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2024
2025 sband = local->hw.wiphy->bands[band];
2026 exrates = sband->n_bitrates;
2027 if (exrates > 8)
2028 exrates -= 8;
2029 else
2030 exrates = 0;
2031
2032 if (skb_tailroom(skb) < exrates + 2)
2033 return -ENOMEM;
2034
2035 if (exrates) {
2036 pos = skb_put(skb, exrates + 2);
2037 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2038 *pos++ = exrates;
2039 for (i = 8; i < sband->n_bitrates; i++) {
2040 u8 basic = 0;
2041 if (need_basic && basic_rates & BIT(i))
2042 basic = 0x80;
2043 rate = sband->bitrates[i].bitrate;
2044 *pos++ = basic | (u8) (rate / 5);
2045 }
2046 }
2047 return 0;
2048 }
2049
2050 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2051 {
2052 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2054
2055 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2056 /* non-managed type inferfaces */
2057 return 0;
2058 }
2059 return ifmgd->ave_beacon_signal / 16;
2060 }
2061 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2062
2063 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2064 {
2065 if (!mcs)
2066 return 1;
2067
2068 /* TODO: consider rx_highest */
2069
2070 if (mcs->rx_mask[3])
2071 return 4;
2072 if (mcs->rx_mask[2])
2073 return 3;
2074 if (mcs->rx_mask[1])
2075 return 2;
2076 return 1;
2077 }
2078
2079 /**
2080 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2081 * @local: mac80211 hw info struct
2082 * @status: RX status
2083 * @mpdu_len: total MPDU length (including FCS)
2084 * @mpdu_offset: offset into MPDU to calculate timestamp at
2085 *
2086 * This function calculates the RX timestamp at the given MPDU offset, taking
2087 * into account what the RX timestamp was. An offset of 0 will just normalize
2088 * the timestamp to TSF at beginning of MPDU reception.
2089 */
2090 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2091 struct ieee80211_rx_status *status,
2092 unsigned int mpdu_len,
2093 unsigned int mpdu_offset)
2094 {
2095 u64 ts = status->mactime;
2096 struct rate_info ri;
2097 u16 rate;
2098
2099 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2100 return 0;
2101
2102 memset(&ri, 0, sizeof(ri));
2103
2104 /* Fill cfg80211 rate info */
2105 if (status->flag & RX_FLAG_HT) {
2106 ri.mcs = status->rate_idx;
2107 ri.flags |= RATE_INFO_FLAGS_MCS;
2108 if (status->flag & RX_FLAG_40MHZ)
2109 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2110 if (status->flag & RX_FLAG_SHORT_GI)
2111 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2112 } else if (status->flag & RX_FLAG_VHT) {
2113 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2114 ri.mcs = status->rate_idx;
2115 ri.nss = status->vht_nss;
2116 if (status->flag & RX_FLAG_40MHZ)
2117 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2118 if (status->flag & RX_FLAG_80MHZ)
2119 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2120 if (status->flag & RX_FLAG_80P80MHZ)
2121 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2122 if (status->flag & RX_FLAG_160MHZ)
2123 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2124 if (status->flag & RX_FLAG_SHORT_GI)
2125 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2126 } else {
2127 struct ieee80211_supported_band *sband;
2128
2129 sband = local->hw.wiphy->bands[status->band];
2130 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2131 }
2132
2133 rate = cfg80211_calculate_bitrate(&ri);
2134
2135 /* rewind from end of MPDU */
2136 if (status->flag & RX_FLAG_MACTIME_END)
2137 ts -= mpdu_len * 8 * 10 / rate;
2138
2139 ts += mpdu_offset * 8 * 10 / rate;
2140
2141 return ts;
2142 }
2143
2144 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2145 {
2146 struct ieee80211_sub_if_data *sdata;
2147
2148 mutex_lock(&local->iflist_mtx);
2149 list_for_each_entry(sdata, &local->interfaces, list) {
2150 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2151
2152 if (sdata->wdev.cac_started) {
2153 ieee80211_vif_release_channel(sdata);
2154 cfg80211_cac_event(sdata->dev,
2155 NL80211_RADAR_CAC_ABORTED,
2156 GFP_KERNEL);
2157 }
2158 }
2159 mutex_unlock(&local->iflist_mtx);
2160 }
2161
2162 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2163 {
2164 struct ieee80211_local *local =
2165 container_of(work, struct ieee80211_local, radar_detected_work);
2166 struct cfg80211_chan_def chandef;
2167
2168 ieee80211_dfs_cac_cancel(local);
2169
2170 if (local->use_chanctx)
2171 /* currently not handled */
2172 WARN_ON(1);
2173 else {
2174 chandef = local->hw.conf.chandef;
2175 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2176 }
2177 }
2178
2179 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2180 {
2181 struct ieee80211_local *local = hw_to_local(hw);
2182
2183 trace_api_radar_detected(local);
2184
2185 ieee80211_queue_work(hw, &local->radar_detected_work);
2186 }
2187 EXPORT_SYMBOL(ieee80211_radar_detected);
Linux kernel - Deliverables
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