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net/mlx4_en: Fix setting initial MAC address
[linux-2.6/libata-dev.git] / net / mac80211 / util.c
blob0f38f43ac62eac316434c60614694d41efed09ff
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 enum queue_stop_reason reason)
457 {
458 struct ieee80211_local *local = hw_to_local(hw);
459 unsigned long flags;
460 int i;
461
462 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
463
464 for (i = 0; i < hw->queues; i++)
465 __ieee80211_stop_queue(hw, i, reason);
466
467 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
468 }
469
470 void ieee80211_stop_queues(struct ieee80211_hw *hw)
471 {
472 ieee80211_stop_queues_by_reason(hw,
473 IEEE80211_QUEUE_STOP_REASON_DRIVER);
474 }
475 EXPORT_SYMBOL(ieee80211_stop_queues);
476
477 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
478 {
479 struct ieee80211_local *local = hw_to_local(hw);
480 unsigned long flags;
481 int ret;
482
483 if (WARN_ON(queue >= hw->queues))
484 return true;
485
486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 ret = !!local->queue_stop_reasons[queue];
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
490 }
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 enum queue_stop_reason reason)
495 {
496 struct ieee80211_local *local = hw_to_local(hw);
497 unsigned long flags;
498 int i;
499
500 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
501
502 for (i = 0; i < hw->queues; i++)
503 __ieee80211_wake_queue(hw, i, reason);
504
505 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506 }
507
508 void ieee80211_wake_queues(struct ieee80211_hw *hw)
509 {
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
511 }
512 EXPORT_SYMBOL(ieee80211_wake_queues);
513
514 void ieee80211_iterate_active_interfaces(
515 struct ieee80211_hw *hw, u32 iter_flags,
516 void (*iterator)(void *data, u8 *mac,
517 struct ieee80211_vif *vif),
518 void *data)
519 {
520 struct ieee80211_local *local = hw_to_local(hw);
521 struct ieee80211_sub_if_data *sdata;
522
523 mutex_lock(&local->iflist_mtx);
524
525 list_for_each_entry(sdata, &local->interfaces, list) {
526 switch (sdata->vif.type) {
527 case NL80211_IFTYPE_MONITOR:
528 case NL80211_IFTYPE_AP_VLAN:
529 continue;
530 default:
531 break;
532 }
533 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
534 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
535 continue;
536 if (ieee80211_sdata_running(sdata))
537 iterator(data, sdata->vif.addr,
538 &sdata->vif);
539 }
540
541 sdata = rcu_dereference_protected(local->monitor_sdata,
542 lockdep_is_held(&local->iflist_mtx));
543 if (sdata &&
544 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
545 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
546 iterator(data, sdata->vif.addr, &sdata->vif);
547
548 mutex_unlock(&local->iflist_mtx);
549 }
550 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
551
552 void ieee80211_iterate_active_interfaces_atomic(
553 struct ieee80211_hw *hw, u32 iter_flags,
554 void (*iterator)(void *data, u8 *mac,
555 struct ieee80211_vif *vif),
556 void *data)
557 {
558 struct ieee80211_local *local = hw_to_local(hw);
559 struct ieee80211_sub_if_data *sdata;
560
561 rcu_read_lock();
562
563 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
564 switch (sdata->vif.type) {
565 case NL80211_IFTYPE_MONITOR:
566 case NL80211_IFTYPE_AP_VLAN:
567 continue;
568 default:
569 break;
570 }
571 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
572 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
573 continue;
574 if (ieee80211_sdata_running(sdata))
575 iterator(data, sdata->vif.addr,
576 &sdata->vif);
577 }
578
579 sdata = rcu_dereference(local->monitor_sdata);
580 if (sdata &&
581 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
582 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
583 iterator(data, sdata->vif.addr, &sdata->vif);
584
585 rcu_read_unlock();
586 }
587 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
588
589 /*
590 * Nothing should have been stuffed into the workqueue during
591 * the suspend->resume cycle. If this WARN is seen then there
592 * is a bug with either the driver suspend or something in
593 * mac80211 stuffing into the workqueue which we haven't yet
594 * cleared during mac80211's suspend cycle.
595 */
596 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
597 {
598 if (WARN(local->suspended && !local->resuming,
599 "queueing ieee80211 work while going to suspend\n"))
600 return false;
601
602 return true;
603 }
604
605 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
606 {
607 struct ieee80211_local *local = hw_to_local(hw);
608
609 if (!ieee80211_can_queue_work(local))
610 return;
611
612 queue_work(local->workqueue, work);
613 }
614 EXPORT_SYMBOL(ieee80211_queue_work);
615
616 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
617 struct delayed_work *dwork,
618 unsigned long delay)
619 {
620 struct ieee80211_local *local = hw_to_local(hw);
621
622 if (!ieee80211_can_queue_work(local))
623 return;
624
625 queue_delayed_work(local->workqueue, dwork, delay);
626 }
627 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
628
629 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
630 struct ieee802_11_elems *elems,
631 u64 filter, u32 crc)
632 {
633 size_t left = len;
634 u8 *pos = start;
635 bool calc_crc = filter != 0;
636 DECLARE_BITMAP(seen_elems, 256);
637
638 bitmap_zero(seen_elems, 256);
639 memset(elems, 0, sizeof(*elems));
640 elems->ie_start = start;
641 elems->total_len = len;
642
643 while (left >= 2) {
644 u8 id, elen;
645 bool elem_parse_failed;
646
647 id = *pos++;
648 elen = *pos++;
649 left -= 2;
650
651 if (elen > left) {
652 elems->parse_error = true;
653 break;
654 }
655
656 switch (id) {
657 case WLAN_EID_SSID:
658 case WLAN_EID_SUPP_RATES:
659 case WLAN_EID_FH_PARAMS:
660 case WLAN_EID_DS_PARAMS:
661 case WLAN_EID_CF_PARAMS:
662 case WLAN_EID_TIM:
663 case WLAN_EID_IBSS_PARAMS:
664 case WLAN_EID_CHALLENGE:
665 case WLAN_EID_RSN:
666 case WLAN_EID_ERP_INFO:
667 case WLAN_EID_EXT_SUPP_RATES:
668 case WLAN_EID_HT_CAPABILITY:
669 case WLAN_EID_HT_OPERATION:
670 case WLAN_EID_VHT_CAPABILITY:
671 case WLAN_EID_VHT_OPERATION:
672 case WLAN_EID_MESH_ID:
673 case WLAN_EID_MESH_CONFIG:
674 case WLAN_EID_PEER_MGMT:
675 case WLAN_EID_PREQ:
676 case WLAN_EID_PREP:
677 case WLAN_EID_PERR:
678 case WLAN_EID_RANN:
679 case WLAN_EID_CHANNEL_SWITCH:
680 case WLAN_EID_EXT_CHANSWITCH_ANN:
681 case WLAN_EID_COUNTRY:
682 case WLAN_EID_PWR_CONSTRAINT:
683 case WLAN_EID_TIMEOUT_INTERVAL:
684 if (test_bit(id, seen_elems)) {
685 elems->parse_error = true;
686 left -= elen;
687 pos += elen;
688 continue;
689 }
690 break;
691 }
692
693 if (calc_crc && id < 64 && (filter & (1ULL << id)))
694 crc = crc32_be(crc, pos - 2, elen + 2);
695
696 elem_parse_failed = false;
697
698 switch (id) {
699 case WLAN_EID_SSID:
700 elems->ssid = pos;
701 elems->ssid_len = elen;
702 break;
703 case WLAN_EID_SUPP_RATES:
704 elems->supp_rates = pos;
705 elems->supp_rates_len = elen;
706 break;
707 case WLAN_EID_FH_PARAMS:
708 elems->fh_params = pos;
709 elems->fh_params_len = elen;
710 break;
711 case WLAN_EID_DS_PARAMS:
712 elems->ds_params = pos;
713 elems->ds_params_len = elen;
714 break;
715 case WLAN_EID_CF_PARAMS:
716 elems->cf_params = pos;
717 elems->cf_params_len = elen;
718 break;
719 case WLAN_EID_TIM:
720 if (elen >= sizeof(struct ieee80211_tim_ie)) {
721 elems->tim = (void *)pos;
722 elems->tim_len = elen;
723 } else
724 elem_parse_failed = true;
725 break;
726 case WLAN_EID_IBSS_PARAMS:
727 elems->ibss_params = pos;
728 elems->ibss_params_len = elen;
729 break;
730 case WLAN_EID_CHALLENGE:
731 elems->challenge = pos;
732 elems->challenge_len = elen;
733 break;
734 case WLAN_EID_VENDOR_SPECIFIC:
735 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
736 pos[2] == 0xf2) {
737 /* Microsoft OUI (00:50:F2) */
738
739 if (calc_crc)
740 crc = crc32_be(crc, pos - 2, elen + 2);
741
742 if (elen >= 5 && pos[3] == 2) {
743 /* OUI Type 2 - WMM IE */
744 if (pos[4] == 0) {
745 elems->wmm_info = pos;
746 elems->wmm_info_len = elen;
747 } else if (pos[4] == 1) {
748 elems->wmm_param = pos;
749 elems->wmm_param_len = elen;
750 }
751 }
752 }
753 break;
754 case WLAN_EID_RSN:
755 elems->rsn = pos;
756 elems->rsn_len = elen;
757 break;
758 case WLAN_EID_ERP_INFO:
759 elems->erp_info = pos;
760 elems->erp_info_len = elen;
761 break;
762 case WLAN_EID_EXT_SUPP_RATES:
763 elems->ext_supp_rates = pos;
764 elems->ext_supp_rates_len = elen;
765 break;
766 case WLAN_EID_HT_CAPABILITY:
767 if (elen >= sizeof(struct ieee80211_ht_cap))
768 elems->ht_cap_elem = (void *)pos;
769 else
770 elem_parse_failed = true;
771 break;
772 case WLAN_EID_HT_OPERATION:
773 if (elen >= sizeof(struct ieee80211_ht_operation))
774 elems->ht_operation = (void *)pos;
775 else
776 elem_parse_failed = true;
777 break;
778 case WLAN_EID_VHT_CAPABILITY:
779 if (elen >= sizeof(struct ieee80211_vht_cap))
780 elems->vht_cap_elem = (void *)pos;
781 else
782 elem_parse_failed = true;
783 break;
784 case WLAN_EID_VHT_OPERATION:
785 if (elen >= sizeof(struct ieee80211_vht_operation))
786 elems->vht_operation = (void *)pos;
787 else
788 elem_parse_failed = true;
789 break;
790 case WLAN_EID_OPMODE_NOTIF:
791 if (elen > 0)
792 elems->opmode_notif = pos;
793 else
794 elem_parse_failed = true;
795 break;
796 case WLAN_EID_MESH_ID:
797 elems->mesh_id = pos;
798 elems->mesh_id_len = elen;
799 break;
800 case WLAN_EID_MESH_CONFIG:
801 if (elen >= sizeof(struct ieee80211_meshconf_ie))
802 elems->mesh_config = (void *)pos;
803 else
804 elem_parse_failed = true;
805 break;
806 case WLAN_EID_PEER_MGMT:
807 elems->peering = pos;
808 elems->peering_len = elen;
809 break;
810 case WLAN_EID_MESH_AWAKE_WINDOW:
811 if (elen >= 2)
812 elems->awake_window = (void *)pos;
813 break;
814 case WLAN_EID_PREQ:
815 elems->preq = pos;
816 elems->preq_len = elen;
817 break;
818 case WLAN_EID_PREP:
819 elems->prep = pos;
820 elems->prep_len = elen;
821 break;
822 case WLAN_EID_PERR:
823 elems->perr = pos;
824 elems->perr_len = elen;
825 break;
826 case WLAN_EID_RANN:
827 if (elen >= sizeof(struct ieee80211_rann_ie))
828 elems->rann = (void *)pos;
829 else
830 elem_parse_failed = true;
831 break;
832 case WLAN_EID_CHANNEL_SWITCH:
833 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
834 elem_parse_failed = true;
835 break;
836 }
837 elems->ch_switch_ie = (void *)pos;
838 break;
839 case WLAN_EID_QUIET:
840 if (!elems->quiet_elem) {
841 elems->quiet_elem = pos;
842 elems->quiet_elem_len = elen;
843 }
844 elems->num_of_quiet_elem++;
845 break;
846 case WLAN_EID_COUNTRY:
847 elems->country_elem = pos;
848 elems->country_elem_len = elen;
849 break;
850 case WLAN_EID_PWR_CONSTRAINT:
851 if (elen != 1) {
852 elem_parse_failed = true;
853 break;
854 }
855 elems->pwr_constr_elem = pos;
856 break;
857 case WLAN_EID_TIMEOUT_INTERVAL:
858 elems->timeout_int = pos;
859 elems->timeout_int_len = elen;
860 break;
861 default:
862 break;
863 }
864
865 if (elem_parse_failed)
866 elems->parse_error = true;
867 else
868 __set_bit(id, seen_elems);
869
870 left -= elen;
871 pos += elen;
872 }
873
874 if (left != 0)
875 elems->parse_error = true;
876
877 return crc;
878 }
879
880 void ieee802_11_parse_elems(u8 *start, size_t len,
881 struct ieee802_11_elems *elems)
882 {
883 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
884 }
885
886 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
887 bool bss_notify)
888 {
889 struct ieee80211_local *local = sdata->local;
890 struct ieee80211_tx_queue_params qparam;
891 struct ieee80211_chanctx_conf *chanctx_conf;
892 int ac;
893 bool use_11b, enable_qos;
894 int aCWmin, aCWmax;
895
896 if (!local->ops->conf_tx)
897 return;
898
899 if (local->hw.queues < IEEE80211_NUM_ACS)
900 return;
901
902 memset(&qparam, 0, sizeof(qparam));
903
904 rcu_read_lock();
905 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
906 use_11b = (chanctx_conf &&
907 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
908 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
909 rcu_read_unlock();
910
911 /*
912 * By default disable QoS in STA mode for old access points, which do
913 * not support 802.11e. New APs will provide proper queue parameters,
914 * that we will configure later.
915 */
916 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
917
918 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
919 /* Set defaults according to 802.11-2007 Table 7-37 */
920 aCWmax = 1023;
921 if (use_11b)
922 aCWmin = 31;
923 else
924 aCWmin = 15;
925
926 if (enable_qos) {
927 switch (ac) {
928 case IEEE80211_AC_BK:
929 qparam.cw_max = aCWmax;
930 qparam.cw_min = aCWmin;
931 qparam.txop = 0;
932 qparam.aifs = 7;
933 break;
934 /* never happens but let's not leave undefined */
935 default:
936 case IEEE80211_AC_BE:
937 qparam.cw_max = aCWmax;
938 qparam.cw_min = aCWmin;
939 qparam.txop = 0;
940 qparam.aifs = 3;
941 break;
942 case IEEE80211_AC_VI:
943 qparam.cw_max = aCWmin;
944 qparam.cw_min = (aCWmin + 1) / 2 - 1;
945 if (use_11b)
946 qparam.txop = 6016/32;
947 else
948 qparam.txop = 3008/32;
949 qparam.aifs = 2;
950 break;
951 case IEEE80211_AC_VO:
952 qparam.cw_max = (aCWmin + 1) / 2 - 1;
953 qparam.cw_min = (aCWmin + 1) / 4 - 1;
954 if (use_11b)
955 qparam.txop = 3264/32;
956 else
957 qparam.txop = 1504/32;
958 qparam.aifs = 2;
959 break;
960 }
961 } else {
962 /* Confiure old 802.11b/g medium access rules. */
963 qparam.cw_max = aCWmax;
964 qparam.cw_min = aCWmin;
965 qparam.txop = 0;
966 qparam.aifs = 2;
967 }
968
969 qparam.uapsd = false;
970
971 sdata->tx_conf[ac] = qparam;
972 drv_conf_tx(local, sdata, ac, &qparam);
973 }
974
975 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
976 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
977 sdata->vif.bss_conf.qos = enable_qos;
978 if (bss_notify)
979 ieee80211_bss_info_change_notify(sdata,
980 BSS_CHANGED_QOS);
981 }
982 }
983
984 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
985 const size_t supp_rates_len,
986 const u8 *supp_rates)
987 {
988 struct ieee80211_chanctx_conf *chanctx_conf;
989 int i, have_higher_than_11mbit = 0;
990
991 /* cf. IEEE 802.11 9.2.12 */
992 for (i = 0; i < supp_rates_len; i++)
993 if ((supp_rates[i] & 0x7f) * 5 > 110)
994 have_higher_than_11mbit = 1;
995
996 rcu_read_lock();
997 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
998
999 if (chanctx_conf &&
1000 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
1001 have_higher_than_11mbit)
1002 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1003 else
1004 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1005 rcu_read_unlock();
1006
1007 ieee80211_set_wmm_default(sdata, true);
1008 }
1009
1010 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1011 enum ieee80211_band band)
1012 {
1013 struct ieee80211_supported_band *sband;
1014 struct ieee80211_rate *bitrates;
1015 u32 mandatory_rates;
1016 enum ieee80211_rate_flags mandatory_flag;
1017 int i;
1018
1019 sband = local->hw.wiphy->bands[band];
1020 if (WARN_ON(!sband))
1021 return 1;
1022
1023 if (band == IEEE80211_BAND_2GHZ)
1024 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1025 else
1026 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1027
1028 bitrates = sband->bitrates;
1029 mandatory_rates = 0;
1030 for (i = 0; i < sband->n_bitrates; i++)
1031 if (bitrates[i].flags & mandatory_flag)
1032 mandatory_rates |= BIT(i);
1033 return mandatory_rates;
1034 }
1035
1036 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1037 u16 transaction, u16 auth_alg, u16 status,
1038 const u8 *extra, size_t extra_len, const u8 *da,
1039 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1040 u32 tx_flags)
1041 {
1042 struct ieee80211_local *local = sdata->local;
1043 struct sk_buff *skb;
1044 struct ieee80211_mgmt *mgmt;
1045 int err;
1046
1047 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1048 sizeof(*mgmt) + 6 + extra_len);
1049 if (!skb)
1050 return;
1051
1052 skb_reserve(skb, local->hw.extra_tx_headroom);
1053
1054 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1055 memset(mgmt, 0, 24 + 6);
1056 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1057 IEEE80211_STYPE_AUTH);
1058 memcpy(mgmt->da, da, ETH_ALEN);
1059 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1060 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1061 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1062 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1063 mgmt->u.auth.status_code = cpu_to_le16(status);
1064 if (extra)
1065 memcpy(skb_put(skb, extra_len), extra, extra_len);
1066
1067 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1068 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1069 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1070 WARN_ON(err);
1071 }
1072
1073 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1074 tx_flags;
1075 ieee80211_tx_skb(sdata, skb);
1076 }
1077
1078 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1079 const u8 *bssid, u16 stype, u16 reason,
1080 bool send_frame, u8 *frame_buf)
1081 {
1082 struct ieee80211_local *local = sdata->local;
1083 struct sk_buff *skb;
1084 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1085
1086 /* build frame */
1087 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1088 mgmt->duration = 0; /* initialize only */
1089 mgmt->seq_ctrl = 0; /* initialize only */
1090 memcpy(mgmt->da, bssid, ETH_ALEN);
1091 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1092 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1093 /* u.deauth.reason_code == u.disassoc.reason_code */
1094 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1095
1096 if (send_frame) {
1097 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1098 IEEE80211_DEAUTH_FRAME_LEN);
1099 if (!skb)
1100 return;
1101
1102 skb_reserve(skb, local->hw.extra_tx_headroom);
1103
1104 /* copy in frame */
1105 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1106 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1107
1108 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1109 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1110 IEEE80211_SKB_CB(skb)->flags |=
1111 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1112
1113 ieee80211_tx_skb(sdata, skb);
1114 }
1115 }
1116
1117 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1118 size_t buffer_len, const u8 *ie, size_t ie_len,
1119 enum ieee80211_band band, u32 rate_mask,
1120 u8 channel)
1121 {
1122 struct ieee80211_supported_band *sband;
1123 u8 *pos = buffer, *end = buffer + buffer_len;
1124 size_t offset = 0, noffset;
1125 int supp_rates_len, i;
1126 u8 rates[32];
1127 int num_rates;
1128 int ext_rates_len;
1129
1130 sband = local->hw.wiphy->bands[band];
1131 if (WARN_ON_ONCE(!sband))
1132 return 0;
1133
1134 num_rates = 0;
1135 for (i = 0; i < sband->n_bitrates; i++) {
1136 if ((BIT(i) & rate_mask) == 0)
1137 continue; /* skip rate */
1138 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1139 }
1140
1141 supp_rates_len = min_t(int, num_rates, 8);
1142
1143 if (end - pos < 2 + supp_rates_len)
1144 goto out_err;
1145 *pos++ = WLAN_EID_SUPP_RATES;
1146 *pos++ = supp_rates_len;
1147 memcpy(pos, rates, supp_rates_len);
1148 pos += supp_rates_len;
1149
1150 /* insert "request information" if in custom IEs */
1151 if (ie && ie_len) {
1152 static const u8 before_extrates[] = {
1153 WLAN_EID_SSID,
1154 WLAN_EID_SUPP_RATES,
1155 WLAN_EID_REQUEST,
1156 };
1157 noffset = ieee80211_ie_split(ie, ie_len,
1158 before_extrates,
1159 ARRAY_SIZE(before_extrates),
1160 offset);
1161 if (end - pos < noffset - offset)
1162 goto out_err;
1163 memcpy(pos, ie + offset, noffset - offset);
1164 pos += noffset - offset;
1165 offset = noffset;
1166 }
1167
1168 ext_rates_len = num_rates - supp_rates_len;
1169 if (ext_rates_len > 0) {
1170 if (end - pos < 2 + ext_rates_len)
1171 goto out_err;
1172 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1173 *pos++ = ext_rates_len;
1174 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1175 pos += ext_rates_len;
1176 }
1177
1178 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1179 if (end - pos < 3)
1180 goto out_err;
1181 *pos++ = WLAN_EID_DS_PARAMS;
1182 *pos++ = 1;
1183 *pos++ = channel;
1184 }
1185
1186 /* insert custom IEs that go before HT */
1187 if (ie && ie_len) {
1188 static const u8 before_ht[] = {
1189 WLAN_EID_SSID,
1190 WLAN_EID_SUPP_RATES,
1191 WLAN_EID_REQUEST,
1192 WLAN_EID_EXT_SUPP_RATES,
1193 WLAN_EID_DS_PARAMS,
1194 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1195 };
1196 noffset = ieee80211_ie_split(ie, ie_len,
1197 before_ht, ARRAY_SIZE(before_ht),
1198 offset);
1199 if (end - pos < noffset - offset)
1200 goto out_err;
1201 memcpy(pos, ie + offset, noffset - offset);
1202 pos += noffset - offset;
1203 offset = noffset;
1204 }
1205
1206 if (sband->ht_cap.ht_supported) {
1207 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1208 goto out_err;
1209 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1210 sband->ht_cap.cap);
1211 }
1212
1213 /*
1214 * If adding more here, adjust code in main.c
1215 * that calculates local->scan_ies_len.
1216 */
1217
1218 /* add any remaining custom IEs */
1219 if (ie && ie_len) {
1220 noffset = ie_len;
1221 if (end - pos < noffset - offset)
1222 goto out_err;
1223 memcpy(pos, ie + offset, noffset - offset);
1224 pos += noffset - offset;
1225 }
1226
1227 if (sband->vht_cap.vht_supported) {
1228 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1229 goto out_err;
1230 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1231 sband->vht_cap.cap);
1232 }
1233
1234 return pos - buffer;
1235 out_err:
1236 WARN_ONCE(1, "not enough space for preq IEs\n");
1237 return pos - buffer;
1238 }
1239
1240 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1241 u8 *dst, u32 ratemask,
1242 struct ieee80211_channel *chan,
1243 const u8 *ssid, size_t ssid_len,
1244 const u8 *ie, size_t ie_len,
1245 bool directed)
1246 {
1247 struct ieee80211_local *local = sdata->local;
1248 struct sk_buff *skb;
1249 struct ieee80211_mgmt *mgmt;
1250 u8 chan_no;
1251 int ies_len;
1252
1253 /*
1254 * Do not send DS Channel parameter for directed probe requests
1255 * in order to maximize the chance that we get a response. Some
1256 * badly-behaved APs don't respond when this parameter is included.
1257 */
1258 if (directed)
1259 chan_no = 0;
1260 else
1261 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1262
1263 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1264 ssid, ssid_len, 100 + ie_len);
1265 if (!skb)
1266 return NULL;
1267
1268 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1269 skb_tailroom(skb),
1270 ie, ie_len, chan->band,
1271 ratemask, chan_no);
1272 skb_put(skb, ies_len);
1273
1274 if (dst) {
1275 mgmt = (struct ieee80211_mgmt *) skb->data;
1276 memcpy(mgmt->da, dst, ETH_ALEN);
1277 memcpy(mgmt->bssid, dst, ETH_ALEN);
1278 }
1279
1280 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1281
1282 return skb;
1283 }
1284
1285 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1286 const u8 *ssid, size_t ssid_len,
1287 const u8 *ie, size_t ie_len,
1288 u32 ratemask, bool directed, u32 tx_flags,
1289 struct ieee80211_channel *channel, bool scan)
1290 {
1291 struct sk_buff *skb;
1292
1293 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1294 ssid, ssid_len,
1295 ie, ie_len, directed);
1296 if (skb) {
1297 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1298 if (scan)
1299 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1300 else
1301 ieee80211_tx_skb(sdata, skb);
1302 }
1303 }
1304
1305 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1306 struct ieee802_11_elems *elems,
1307 enum ieee80211_band band, u32 *basic_rates)
1308 {
1309 struct ieee80211_supported_band *sband;
1310 struct ieee80211_rate *bitrates;
1311 size_t num_rates;
1312 u32 supp_rates;
1313 int i, j;
1314 sband = local->hw.wiphy->bands[band];
1315
1316 if (WARN_ON(!sband))
1317 return 1;
1318
1319 bitrates = sband->bitrates;
1320 num_rates = sband->n_bitrates;
1321 supp_rates = 0;
1322 for (i = 0; i < elems->supp_rates_len +
1323 elems->ext_supp_rates_len; i++) {
1324 u8 rate = 0;
1325 int own_rate;
1326 bool is_basic;
1327 if (i < elems->supp_rates_len)
1328 rate = elems->supp_rates[i];
1329 else if (elems->ext_supp_rates)
1330 rate = elems->ext_supp_rates
1331 [i - elems->supp_rates_len];
1332 own_rate = 5 * (rate & 0x7f);
1333 is_basic = !!(rate & 0x80);
1334
1335 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1336 continue;
1337
1338 for (j = 0; j < num_rates; j++) {
1339 if (bitrates[j].bitrate == own_rate) {
1340 supp_rates |= BIT(j);
1341 if (basic_rates && is_basic)
1342 *basic_rates |= BIT(j);
1343 }
1344 }
1345 }
1346 return supp_rates;
1347 }
1348
1349 void ieee80211_stop_device(struct ieee80211_local *local)
1350 {
1351 ieee80211_led_radio(local, false);
1352 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1353
1354 cancel_work_sync(&local->reconfig_filter);
1355
1356 flush_workqueue(local->workqueue);
1357 drv_stop(local);
1358 }
1359
1360 int ieee80211_reconfig(struct ieee80211_local *local)
1361 {
1362 struct ieee80211_hw *hw = &local->hw;
1363 struct ieee80211_sub_if_data *sdata;
1364 struct ieee80211_chanctx *ctx;
1365 struct sta_info *sta;
1366 int res, i;
1367 bool reconfig_due_to_wowlan = false;
1368
1369 #ifdef CONFIG_PM
1370 if (local->suspended)
1371 local->resuming = true;
1372
1373 if (local->wowlan) {
1374 local->wowlan = false;
1375 res = drv_resume(local);
1376 if (res < 0) {
1377 local->resuming = false;
1378 return res;
1379 }
1380 if (res == 0)
1381 goto wake_up;
1382 WARN_ON(res > 1);
1383 /*
1384 * res is 1, which means the driver requested
1385 * to go through a regular reset on wakeup.
1386 */
1387 reconfig_due_to_wowlan = true;
1388 }
1389 #endif
1390 /* everything else happens only if HW was up & running */
1391 if (!local->open_count)
1392 goto wake_up;
1393
1394 /*
1395 * Upon resume hardware can sometimes be goofy due to
1396 * various platform / driver / bus issues, so restarting
1397 * the device may at times not work immediately. Propagate
1398 * the error.
1399 */
1400 res = drv_start(local);
1401 if (res) {
1402 WARN(local->suspended, "Hardware became unavailable "
1403 "upon resume. This could be a software issue "
1404 "prior to suspend or a hardware issue.\n");
1405 return res;
1406 }
1407
1408 /* setup fragmentation threshold */
1409 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1410
1411 /* setup RTS threshold */
1412 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1413
1414 /* reset coverage class */
1415 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1416
1417 ieee80211_led_radio(local, true);
1418 ieee80211_mod_tpt_led_trig(local,
1419 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1420
1421 /* add interfaces */
1422 sdata = rtnl_dereference(local->monitor_sdata);
1423 if (sdata) {
1424 res = drv_add_interface(local, sdata);
1425 if (WARN_ON(res)) {
1426 rcu_assign_pointer(local->monitor_sdata, NULL);
1427 synchronize_net();
1428 kfree(sdata);
1429 }
1430 }
1431
1432 list_for_each_entry(sdata, &local->interfaces, list) {
1433 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1434 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1435 ieee80211_sdata_running(sdata))
1436 res = drv_add_interface(local, sdata);
1437 }
1438
1439 /* add channel contexts */
1440 if (local->use_chanctx) {
1441 mutex_lock(&local->chanctx_mtx);
1442 list_for_each_entry(ctx, &local->chanctx_list, list)
1443 WARN_ON(drv_add_chanctx(local, ctx));
1444 mutex_unlock(&local->chanctx_mtx);
1445 }
1446
1447 list_for_each_entry(sdata, &local->interfaces, list) {
1448 struct ieee80211_chanctx_conf *ctx_conf;
1449
1450 if (!ieee80211_sdata_running(sdata))
1451 continue;
1452
1453 mutex_lock(&local->chanctx_mtx);
1454 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1455 lockdep_is_held(&local->chanctx_mtx));
1456 if (ctx_conf) {
1457 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1458 conf);
1459 drv_assign_vif_chanctx(local, sdata, ctx);
1460 }
1461 mutex_unlock(&local->chanctx_mtx);
1462 }
1463
1464 sdata = rtnl_dereference(local->monitor_sdata);
1465 if (sdata && local->use_chanctx && ieee80211_sdata_running(sdata)) {
1466 struct ieee80211_chanctx_conf *ctx_conf;
1467
1468 mutex_lock(&local->chanctx_mtx);
1469 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1470 lockdep_is_held(&local->chanctx_mtx));
1471 if (ctx_conf) {
1472 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1473 conf);
1474 drv_assign_vif_chanctx(local, sdata, ctx);
1475 }
1476 mutex_unlock(&local->chanctx_mtx);
1477 }
1478
1479 /* add STAs back */
1480 mutex_lock(&local->sta_mtx);
1481 list_for_each_entry(sta, &local->sta_list, list) {
1482 enum ieee80211_sta_state state;
1483
1484 if (!sta->uploaded)
1485 continue;
1486
1487 /* AP-mode stations will be added later */
1488 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1489 continue;
1490
1491 for (state = IEEE80211_STA_NOTEXIST;
1492 state < sta->sta_state; state++)
1493 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1494 state + 1));
1495 }
1496 mutex_unlock(&local->sta_mtx);
1497
1498 /* reconfigure tx conf */
1499 if (hw->queues >= IEEE80211_NUM_ACS) {
1500 list_for_each_entry(sdata, &local->interfaces, list) {
1501 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1502 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1503 !ieee80211_sdata_running(sdata))
1504 continue;
1505
1506 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1507 drv_conf_tx(local, sdata, i,
1508 &sdata->tx_conf[i]);
1509 }
1510 }
1511
1512 /* reconfigure hardware */
1513 ieee80211_hw_config(local, ~0);
1514
1515 ieee80211_configure_filter(local);
1516
1517 /* Finally also reconfigure all the BSS information */
1518 list_for_each_entry(sdata, &local->interfaces, list) {
1519 u32 changed;
1520
1521 if (!ieee80211_sdata_running(sdata))
1522 continue;
1523
1524 /* common change flags for all interface types */
1525 changed = BSS_CHANGED_ERP_CTS_PROT |
1526 BSS_CHANGED_ERP_PREAMBLE |
1527 BSS_CHANGED_ERP_SLOT |
1528 BSS_CHANGED_HT |
1529 BSS_CHANGED_BASIC_RATES |
1530 BSS_CHANGED_BEACON_INT |
1531 BSS_CHANGED_BSSID |
1532 BSS_CHANGED_CQM |
1533 BSS_CHANGED_QOS |
1534 BSS_CHANGED_IDLE |
1535 BSS_CHANGED_TXPOWER;
1536
1537 #ifdef CONFIG_PM
1538 if (local->resuming && !reconfig_due_to_wowlan)
1539 sdata->vif.bss_conf = sdata->suspend_bss_conf;
1540 #endif
1541
1542 switch (sdata->vif.type) {
1543 case NL80211_IFTYPE_STATION:
1544 changed |= BSS_CHANGED_ASSOC |
1545 BSS_CHANGED_ARP_FILTER |
1546 BSS_CHANGED_PS;
1547
1548 if (sdata->u.mgd.dtim_period)
1549 changed |= BSS_CHANGED_DTIM_PERIOD;
1550
1551 mutex_lock(&sdata->u.mgd.mtx);
1552 ieee80211_bss_info_change_notify(sdata, changed);
1553 mutex_unlock(&sdata->u.mgd.mtx);
1554 break;
1555 case NL80211_IFTYPE_ADHOC:
1556 changed |= BSS_CHANGED_IBSS;
1557 /* fall through */
1558 case NL80211_IFTYPE_AP:
1559 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1560
1561 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1562 changed |= BSS_CHANGED_AP_PROBE_RESP;
1563
1564 if (rcu_access_pointer(sdata->u.ap.beacon))
1565 drv_start_ap(local, sdata);
1566 }
1567
1568 /* fall through */
1569 case NL80211_IFTYPE_MESH_POINT:
1570 if (sdata->vif.bss_conf.enable_beacon) {
1571 changed |= BSS_CHANGED_BEACON |
1572 BSS_CHANGED_BEACON_ENABLED;
1573 ieee80211_bss_info_change_notify(sdata, changed);
1574 }
1575 break;
1576 case NL80211_IFTYPE_WDS:
1577 break;
1578 case NL80211_IFTYPE_AP_VLAN:
1579 case NL80211_IFTYPE_MONITOR:
1580 /* ignore virtual */
1581 break;
1582 case NL80211_IFTYPE_P2P_DEVICE:
1583 changed = BSS_CHANGED_IDLE;
1584 break;
1585 case NL80211_IFTYPE_UNSPECIFIED:
1586 case NUM_NL80211_IFTYPES:
1587 case NL80211_IFTYPE_P2P_CLIENT:
1588 case NL80211_IFTYPE_P2P_GO:
1589 WARN_ON(1);
1590 break;
1591 }
1592 }
1593
1594 ieee80211_recalc_ps(local, -1);
1595
1596 /*
1597 * The sta might be in psm against the ap (e.g. because
1598 * this was the state before a hw restart), so we
1599 * explicitly send a null packet in order to make sure
1600 * it'll sync against the ap (and get out of psm).
1601 */
1602 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1603 list_for_each_entry(sdata, &local->interfaces, list) {
1604 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1605 continue;
1606 if (!sdata->u.mgd.associated)
1607 continue;
1608
1609 ieee80211_send_nullfunc(local, sdata, 0);
1610 }
1611 }
1612
1613 /* APs are now beaconing, add back stations */
1614 mutex_lock(&local->sta_mtx);
1615 list_for_each_entry(sta, &local->sta_list, list) {
1616 enum ieee80211_sta_state state;
1617
1618 if (!sta->uploaded)
1619 continue;
1620
1621 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1622 continue;
1623
1624 for (state = IEEE80211_STA_NOTEXIST;
1625 state < sta->sta_state; state++)
1626 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1627 state + 1));
1628 }
1629 mutex_unlock(&local->sta_mtx);
1630
1631 /* add back keys */
1632 list_for_each_entry(sdata, &local->interfaces, list)
1633 if (ieee80211_sdata_running(sdata))
1634 ieee80211_enable_keys(sdata);
1635
1636 wake_up:
1637 local->in_reconfig = false;
1638 barrier();
1639
1640 /*
1641 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1642 * sessions can be established after a resume.
1643 *
1644 * Also tear down aggregation sessions since reconfiguring
1645 * them in a hardware restart scenario is not easily done
1646 * right now, and the hardware will have lost information
1647 * about the sessions, but we and the AP still think they
1648 * are active. This is really a workaround though.
1649 */
1650 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1651 mutex_lock(&local->sta_mtx);
1652
1653 list_for_each_entry(sta, &local->sta_list, list) {
1654 ieee80211_sta_tear_down_BA_sessions(
1655 sta, AGG_STOP_LOCAL_REQUEST);
1656 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1657 }
1658
1659 mutex_unlock(&local->sta_mtx);
1660 }
1661
1662 ieee80211_wake_queues_by_reason(hw,
1663 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1664
1665 /*
1666 * If this is for hw restart things are still running.
1667 * We may want to change that later, however.
1668 */
1669 if (!local->suspended || reconfig_due_to_wowlan)
1670 drv_restart_complete(local);
1671
1672 if (!local->suspended)
1673 return 0;
1674
1675 #ifdef CONFIG_PM
1676 /* first set suspended false, then resuming */
1677 local->suspended = false;
1678 mb();
1679 local->resuming = false;
1680
1681 list_for_each_entry(sdata, &local->interfaces, list) {
1682 switch(sdata->vif.type) {
1683 case NL80211_IFTYPE_STATION:
1684 ieee80211_sta_restart(sdata);
1685 break;
1686 case NL80211_IFTYPE_ADHOC:
1687 ieee80211_ibss_restart(sdata);
1688 break;
1689 case NL80211_IFTYPE_MESH_POINT:
1690 ieee80211_mesh_restart(sdata);
1691 break;
1692 default:
1693 break;
1694 }
1695 }
1696
1697 mod_timer(&local->sta_cleanup, jiffies + 1);
1698
1699 mutex_lock(&local->sta_mtx);
1700 list_for_each_entry(sta, &local->sta_list, list)
1701 mesh_plink_restart(sta);
1702 mutex_unlock(&local->sta_mtx);
1703 #else
1704 WARN_ON(1);
1705 #endif
1706 return 0;
1707 }
1708
1709 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1710 {
1711 struct ieee80211_sub_if_data *sdata;
1712 struct ieee80211_local *local;
1713 struct ieee80211_key *key;
1714
1715 if (WARN_ON(!vif))
1716 return;
1717
1718 sdata = vif_to_sdata(vif);
1719 local = sdata->local;
1720
1721 if (WARN_ON(!local->resuming))
1722 return;
1723
1724 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1725 return;
1726
1727 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1728
1729 mutex_lock(&local->key_mtx);
1730 list_for_each_entry(key, &sdata->key_list, list)
1731 key->flags |= KEY_FLAG_TAINTED;
1732 mutex_unlock(&local->key_mtx);
1733 }
1734 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1735
1736 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1737 {
1738 struct ieee80211_local *local = sdata->local;
1739 struct ieee80211_chanctx_conf *chanctx_conf;
1740 struct ieee80211_chanctx *chanctx;
1741
1742 mutex_lock(&local->chanctx_mtx);
1743
1744 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1745 lockdep_is_held(&local->chanctx_mtx));
1746
1747 if (WARN_ON_ONCE(!chanctx_conf))
1748 goto unlock;
1749
1750 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1751 ieee80211_recalc_smps_chanctx(local, chanctx);
1752 unlock:
1753 mutex_unlock(&local->chanctx_mtx);
1754 }
1755
1756 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1757 {
1758 int i;
1759
1760 for (i = 0; i < n_ids; i++)
1761 if (ids[i] == id)
1762 return true;
1763 return false;
1764 }
1765
1766 /**
1767 * ieee80211_ie_split - split an IE buffer according to ordering
1768 *
1769 * @ies: the IE buffer
1770 * @ielen: the length of the IE buffer
1771 * @ids: an array with element IDs that are allowed before
1772 * the split
1773 * @n_ids: the size of the element ID array
1774 * @offset: offset where to start splitting in the buffer
1775 *
1776 * This function splits an IE buffer by updating the @offset
1777 * variable to point to the location where the buffer should be
1778 * split.
1779 *
1780 * It assumes that the given IE buffer is well-formed, this
1781 * has to be guaranteed by the caller!
1782 *
1783 * It also assumes that the IEs in the buffer are ordered
1784 * correctly, if not the result of using this function will not
1785 * be ordered correctly either, i.e. it does no reordering.
1786 *
1787 * The function returns the offset where the next part of the
1788 * buffer starts, which may be @ielen if the entire (remainder)
1789 * of the buffer should be used.
1790 */
1791 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1792 const u8 *ids, int n_ids, size_t offset)
1793 {
1794 size_t pos = offset;
1795
1796 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1797 pos += 2 + ies[pos + 1];
1798
1799 return pos;
1800 }
1801
1802 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1803 {
1804 size_t pos = offset;
1805
1806 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1807 pos += 2 + ies[pos + 1];
1808
1809 return pos;
1810 }
1811
1812 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1813 int rssi_min_thold,
1814 int rssi_max_thold)
1815 {
1816 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1817
1818 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1819 return;
1820
1821 /*
1822 * Scale up threshold values before storing it, as the RSSI averaging
1823 * algorithm uses a scaled up value as well. Change this scaling
1824 * factor if the RSSI averaging algorithm changes.
1825 */
1826 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1827 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1828 }
1829
1830 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1831 int rssi_min_thold,
1832 int rssi_max_thold)
1833 {
1834 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1835
1836 WARN_ON(rssi_min_thold == rssi_max_thold ||
1837 rssi_min_thold > rssi_max_thold);
1838
1839 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1840 rssi_max_thold);
1841 }
1842 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1843
1844 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1845 {
1846 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1847
1848 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1849 }
1850 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1851
1852 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1853 u16 cap)
1854 {
1855 __le16 tmp;
1856
1857 *pos++ = WLAN_EID_HT_CAPABILITY;
1858 *pos++ = sizeof(struct ieee80211_ht_cap);
1859 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1860
1861 /* capability flags */
1862 tmp = cpu_to_le16(cap);
1863 memcpy(pos, &tmp, sizeof(u16));
1864 pos += sizeof(u16);
1865
1866 /* AMPDU parameters */
1867 *pos++ = ht_cap->ampdu_factor |
1868 (ht_cap->ampdu_density <<
1869 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1870
1871 /* MCS set */
1872 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1873 pos += sizeof(ht_cap->mcs);
1874
1875 /* extended capabilities */
1876 pos += sizeof(__le16);
1877
1878 /* BF capabilities */
1879 pos += sizeof(__le32);
1880
1881 /* antenna selection */
1882 pos += sizeof(u8);
1883
1884 return pos;
1885 }
1886
1887 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1888 u32 cap)
1889 {
1890 __le32 tmp;
1891
1892 *pos++ = WLAN_EID_VHT_CAPABILITY;
1893 *pos++ = sizeof(struct ieee80211_vht_cap);
1894 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1895
1896 /* capability flags */
1897 tmp = cpu_to_le32(cap);
1898 memcpy(pos, &tmp, sizeof(u32));
1899 pos += sizeof(u32);
1900
1901 /* VHT MCS set */
1902 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1903 pos += sizeof(vht_cap->vht_mcs);
1904
1905 return pos;
1906 }
1907
1908 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1909 const struct cfg80211_chan_def *chandef,
1910 u16 prot_mode)
1911 {
1912 struct ieee80211_ht_operation *ht_oper;
1913 /* Build HT Information */
1914 *pos++ = WLAN_EID_HT_OPERATION;
1915 *pos++ = sizeof(struct ieee80211_ht_operation);
1916 ht_oper = (struct ieee80211_ht_operation *)pos;
1917 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1918 chandef->chan->center_freq);
1919 switch (chandef->width) {
1920 case NL80211_CHAN_WIDTH_160:
1921 case NL80211_CHAN_WIDTH_80P80:
1922 case NL80211_CHAN_WIDTH_80:
1923 case NL80211_CHAN_WIDTH_40:
1924 if (chandef->center_freq1 > chandef->chan->center_freq)
1925 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1926 else
1927 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1928 break;
1929 default:
1930 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1931 break;
1932 }
1933 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1934 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1935 chandef->width != NL80211_CHAN_WIDTH_20)
1936 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1937
1938 ht_oper->operation_mode = cpu_to_le16(prot_mode);
1939 ht_oper->stbc_param = 0x0000;
1940
1941 /* It seems that Basic MCS set and Supported MCS set
1942 are identical for the first 10 bytes */
1943 memset(&ht_oper->basic_set, 0, 16);
1944 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1945
1946 return pos + sizeof(struct ieee80211_ht_operation);
1947 }
1948
1949 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1950 const struct ieee80211_ht_operation *ht_oper,
1951 struct cfg80211_chan_def *chandef)
1952 {
1953 enum nl80211_channel_type channel_type;
1954
1955 if (!ht_oper) {
1956 cfg80211_chandef_create(chandef, control_chan,
1957 NL80211_CHAN_NO_HT);
1958 return;
1959 }
1960
1961 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1962 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1963 channel_type = NL80211_CHAN_HT20;
1964 break;
1965 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1966 channel_type = NL80211_CHAN_HT40PLUS;
1967 break;
1968 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1969 channel_type = NL80211_CHAN_HT40MINUS;
1970 break;
1971 default:
1972 channel_type = NL80211_CHAN_NO_HT;
1973 }
1974
1975 cfg80211_chandef_create(chandef, control_chan, channel_type);
1976 }
1977
1978 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1979 struct sk_buff *skb, bool need_basic,
1980 enum ieee80211_band band)
1981 {
1982 struct ieee80211_local *local = sdata->local;
1983 struct ieee80211_supported_band *sband;
1984 int rate;
1985 u8 i, rates, *pos;
1986 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1987
1988 sband = local->hw.wiphy->bands[band];
1989 rates = sband->n_bitrates;
1990 if (rates > 8)
1991 rates = 8;
1992
1993 if (skb_tailroom(skb) < rates + 2)
1994 return -ENOMEM;
1995
1996 pos = skb_put(skb, rates + 2);
1997 *pos++ = WLAN_EID_SUPP_RATES;
1998 *pos++ = rates;
1999 for (i = 0; i < rates; i++) {
2000 u8 basic = 0;
2001 if (need_basic && basic_rates & BIT(i))
2002 basic = 0x80;
2003 rate = sband->bitrates[i].bitrate;
2004 *pos++ = basic | (u8) (rate / 5);
2005 }
2006
2007 return 0;
2008 }
2009
2010 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2011 struct sk_buff *skb, bool need_basic,
2012 enum ieee80211_band band)
2013 {
2014 struct ieee80211_local *local = sdata->local;
2015 struct ieee80211_supported_band *sband;
2016 int rate;
2017 u8 i, exrates, *pos;
2018 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2019
2020 sband = local->hw.wiphy->bands[band];
2021 exrates = sband->n_bitrates;
2022 if (exrates > 8)
2023 exrates -= 8;
2024 else
2025 exrates = 0;
2026
2027 if (skb_tailroom(skb) < exrates + 2)
2028 return -ENOMEM;
2029
2030 if (exrates) {
2031 pos = skb_put(skb, exrates + 2);
2032 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2033 *pos++ = exrates;
2034 for (i = 8; i < sband->n_bitrates; i++) {
2035 u8 basic = 0;
2036 if (need_basic && basic_rates & BIT(i))
2037 basic = 0x80;
2038 rate = sband->bitrates[i].bitrate;
2039 *pos++ = basic | (u8) (rate / 5);
2040 }
2041 }
2042 return 0;
2043 }
2044
2045 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2046 {
2047 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2049
2050 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2051 /* non-managed type inferfaces */
2052 return 0;
2053 }
2054 return ifmgd->ave_beacon_signal;
2055 }
2056 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2057
2058 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2059 {
2060 if (!mcs)
2061 return 1;
2062
2063 /* TODO: consider rx_highest */
2064
2065 if (mcs->rx_mask[3])
2066 return 4;
2067 if (mcs->rx_mask[2])
2068 return 3;
2069 if (mcs->rx_mask[1])
2070 return 2;
2071 return 1;
2072 }
2073
2074 /**
2075 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2076 * @local: mac80211 hw info struct
2077 * @status: RX status
2078 * @mpdu_len: total MPDU length (including FCS)
2079 * @mpdu_offset: offset into MPDU to calculate timestamp at
2080 *
2081 * This function calculates the RX timestamp at the given MPDU offset, taking
2082 * into account what the RX timestamp was. An offset of 0 will just normalize
2083 * the timestamp to TSF at beginning of MPDU reception.
2084 */
2085 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2086 struct ieee80211_rx_status *status,
2087 unsigned int mpdu_len,
2088 unsigned int mpdu_offset)
2089 {
2090 u64 ts = status->mactime;
2091 struct rate_info ri;
2092 u16 rate;
2093
2094 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2095 return 0;
2096
2097 memset(&ri, 0, sizeof(ri));
2098
2099 /* Fill cfg80211 rate info */
2100 if (status->flag & RX_FLAG_HT) {
2101 ri.mcs = status->rate_idx;
2102 ri.flags |= RATE_INFO_FLAGS_MCS;
2103 if (status->flag & RX_FLAG_40MHZ)
2104 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2105 if (status->flag & RX_FLAG_SHORT_GI)
2106 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2107 } else if (status->flag & RX_FLAG_VHT) {
2108 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2109 ri.mcs = status->rate_idx;
2110 ri.nss = status->vht_nss;
2111 if (status->flag & RX_FLAG_40MHZ)
2112 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2113 if (status->flag & RX_FLAG_80MHZ)
2114 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2115 if (status->flag & RX_FLAG_80P80MHZ)
2116 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2117 if (status->flag & RX_FLAG_160MHZ)
2118 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2119 if (status->flag & RX_FLAG_SHORT_GI)
2120 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2121 } else {
2122 struct ieee80211_supported_band *sband;
2123
2124 sband = local->hw.wiphy->bands[status->band];
2125 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2126 }
2127
2128 rate = cfg80211_calculate_bitrate(&ri);
2129
2130 /* rewind from end of MPDU */
2131 if (status->flag & RX_FLAG_MACTIME_END)
2132 ts -= mpdu_len * 8 * 10 / rate;
2133
2134 ts += mpdu_offset * 8 * 10 / rate;
2135
2136 return ts;
2137 }
2138
2139 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2140 {
2141 struct ieee80211_sub_if_data *sdata;
2142
2143 mutex_lock(&local->iflist_mtx);
2144 list_for_each_entry(sdata, &local->interfaces, list) {
2145 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2146
2147 if (sdata->wdev.cac_started) {
2148 ieee80211_vif_release_channel(sdata);
2149 cfg80211_cac_event(sdata->dev,
2150 NL80211_RADAR_CAC_ABORTED,
2151 GFP_KERNEL);
2152 }
2153 }
2154 mutex_unlock(&local->iflist_mtx);
2155 }
2156
2157 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2158 {
2159 struct ieee80211_local *local =
2160 container_of(work, struct ieee80211_local, radar_detected_work);
2161 struct cfg80211_chan_def chandef;
2162
2163 ieee80211_dfs_cac_cancel(local);
2164
2165 if (local->use_chanctx)
2166 /* currently not handled */
2167 WARN_ON(1);
2168 else {
2169 cfg80211_chandef_create(&chandef, local->hw.conf.channel,
2170 local->hw.conf.channel_type);
2171 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2172 }
2173 }
2174
2175 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2176 {
2177 struct ieee80211_local *local = hw_to_local(hw);
2178
2179 trace_api_radar_detected(local);
2180
2181 ieee80211_queue_work(hw, &local->radar_detected_work);
2182 }
2183 EXPORT_SYMBOL(ieee80211_radar_detected);
Linux 2.6 libata-dev (mirror)