?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
brcmfmac: fix compiler warning on printf format
[linux-2.6/btrfs-unstable.git] / net / mac80211 / util.c
blob6cb71a350eddd5913a674a319409177638e69238
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 (pos[3] == 1) {
743 /* OUI Type 1 - WPA IE */
744 elems->wpa = pos;
745 elems->wpa_len = elen;
746 } else if (elen >= 5 && pos[3] == 2) {
747 /* OUI Type 2 - WMM IE */
748 if (pos[4] == 0) {
749 elems->wmm_info = pos;
750 elems->wmm_info_len = elen;
751 } else if (pos[4] == 1) {
752 elems->wmm_param = pos;
753 elems->wmm_param_len = elen;
754 }
755 }
756 }
757 break;
758 case WLAN_EID_RSN:
759 elems->rsn = pos;
760 elems->rsn_len = elen;
761 break;
762 case WLAN_EID_ERP_INFO:
763 elems->erp_info = pos;
764 elems->erp_info_len = elen;
765 break;
766 case WLAN_EID_EXT_SUPP_RATES:
767 elems->ext_supp_rates = pos;
768 elems->ext_supp_rates_len = elen;
769 break;
770 case WLAN_EID_HT_CAPABILITY:
771 if (elen >= sizeof(struct ieee80211_ht_cap))
772 elems->ht_cap_elem = (void *)pos;
773 else
774 elem_parse_failed = true;
775 break;
776 case WLAN_EID_HT_OPERATION:
777 if (elen >= sizeof(struct ieee80211_ht_operation))
778 elems->ht_operation = (void *)pos;
779 else
780 elem_parse_failed = true;
781 break;
782 case WLAN_EID_VHT_CAPABILITY:
783 if (elen >= sizeof(struct ieee80211_vht_cap))
784 elems->vht_cap_elem = (void *)pos;
785 else
786 elem_parse_failed = true;
787 break;
788 case WLAN_EID_VHT_OPERATION:
789 if (elen >= sizeof(struct ieee80211_vht_operation))
790 elems->vht_operation = (void *)pos;
791 else
792 elem_parse_failed = true;
793 break;
794 case WLAN_EID_MESH_ID:
795 elems->mesh_id = pos;
796 elems->mesh_id_len = elen;
797 break;
798 case WLAN_EID_MESH_CONFIG:
799 if (elen >= sizeof(struct ieee80211_meshconf_ie))
800 elems->mesh_config = (void *)pos;
801 else
802 elem_parse_failed = true;
803 break;
804 case WLAN_EID_PEER_MGMT:
805 elems->peering = pos;
806 elems->peering_len = elen;
807 break;
808 case WLAN_EID_MESH_AWAKE_WINDOW:
809 if (elen >= 2)
810 elems->awake_window = (void *)pos;
811 break;
812 case WLAN_EID_PREQ:
813 elems->preq = pos;
814 elems->preq_len = elen;
815 break;
816 case WLAN_EID_PREP:
817 elems->prep = pos;
818 elems->prep_len = elen;
819 break;
820 case WLAN_EID_PERR:
821 elems->perr = pos;
822 elems->perr_len = elen;
823 break;
824 case WLAN_EID_RANN:
825 if (elen >= sizeof(struct ieee80211_rann_ie))
826 elems->rann = (void *)pos;
827 else
828 elem_parse_failed = true;
829 break;
830 case WLAN_EID_CHANNEL_SWITCH:
831 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
832 elem_parse_failed = true;
833 break;
834 }
835 elems->ch_switch_ie = (void *)pos;
836 break;
837 case WLAN_EID_QUIET:
838 if (!elems->quiet_elem) {
839 elems->quiet_elem = pos;
840 elems->quiet_elem_len = elen;
841 }
842 elems->num_of_quiet_elem++;
843 break;
844 case WLAN_EID_COUNTRY:
845 elems->country_elem = pos;
846 elems->country_elem_len = elen;
847 break;
848 case WLAN_EID_PWR_CONSTRAINT:
849 if (elen != 1) {
850 elem_parse_failed = true;
851 break;
852 }
853 elems->pwr_constr_elem = pos;
854 break;
855 case WLAN_EID_TIMEOUT_INTERVAL:
856 elems->timeout_int = pos;
857 elems->timeout_int_len = elen;
858 break;
859 default:
860 break;
861 }
862
863 if (elem_parse_failed)
864 elems->parse_error = true;
865 else
866 __set_bit(id, seen_elems);
867
868 left -= elen;
869 pos += elen;
870 }
871
872 if (left != 0)
873 elems->parse_error = true;
874
875 return crc;
876 }
877
878 void ieee802_11_parse_elems(u8 *start, size_t len,
879 struct ieee802_11_elems *elems)
880 {
881 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
882 }
883
884 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
885 bool bss_notify)
886 {
887 struct ieee80211_local *local = sdata->local;
888 struct ieee80211_tx_queue_params qparam;
889 struct ieee80211_chanctx_conf *chanctx_conf;
890 int ac;
891 bool use_11b, enable_qos;
892 int aCWmin, aCWmax;
893
894 if (!local->ops->conf_tx)
895 return;
896
897 if (local->hw.queues < IEEE80211_NUM_ACS)
898 return;
899
900 memset(&qparam, 0, sizeof(qparam));
901
902 rcu_read_lock();
903 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
904 use_11b = (chanctx_conf &&
905 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
906 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
907 rcu_read_unlock();
908
909 /*
910 * By default disable QoS in STA mode for old access points, which do
911 * not support 802.11e. New APs will provide proper queue parameters,
912 * that we will configure later.
913 */
914 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
915
916 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
917 /* Set defaults according to 802.11-2007 Table 7-37 */
918 aCWmax = 1023;
919 if (use_11b)
920 aCWmin = 31;
921 else
922 aCWmin = 15;
923
924 if (enable_qos) {
925 switch (ac) {
926 case IEEE80211_AC_BK:
927 qparam.cw_max = aCWmax;
928 qparam.cw_min = aCWmin;
929 qparam.txop = 0;
930 qparam.aifs = 7;
931 break;
932 /* never happens but let's not leave undefined */
933 default:
934 case IEEE80211_AC_BE:
935 qparam.cw_max = aCWmax;
936 qparam.cw_min = aCWmin;
937 qparam.txop = 0;
938 qparam.aifs = 3;
939 break;
940 case IEEE80211_AC_VI:
941 qparam.cw_max = aCWmin;
942 qparam.cw_min = (aCWmin + 1) / 2 - 1;
943 if (use_11b)
944 qparam.txop = 6016/32;
945 else
946 qparam.txop = 3008/32;
947 qparam.aifs = 2;
948 break;
949 case IEEE80211_AC_VO:
950 qparam.cw_max = (aCWmin + 1) / 2 - 1;
951 qparam.cw_min = (aCWmin + 1) / 4 - 1;
952 if (use_11b)
953 qparam.txop = 3264/32;
954 else
955 qparam.txop = 1504/32;
956 qparam.aifs = 2;
957 break;
958 }
959 } else {
960 /* Confiure old 802.11b/g medium access rules. */
961 qparam.cw_max = aCWmax;
962 qparam.cw_min = aCWmin;
963 qparam.txop = 0;
964 qparam.aifs = 2;
965 }
966
967 qparam.uapsd = false;
968
969 sdata->tx_conf[ac] = qparam;
970 drv_conf_tx(local, sdata, ac, &qparam);
971 }
972
973 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
974 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
975 sdata->vif.bss_conf.qos = enable_qos;
976 if (bss_notify)
977 ieee80211_bss_info_change_notify(sdata,
978 BSS_CHANGED_QOS);
979 }
980 }
981
982 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
983 const size_t supp_rates_len,
984 const u8 *supp_rates)
985 {
986 struct ieee80211_chanctx_conf *chanctx_conf;
987 int i, have_higher_than_11mbit = 0;
988
989 /* cf. IEEE 802.11 9.2.12 */
990 for (i = 0; i < supp_rates_len; i++)
991 if ((supp_rates[i] & 0x7f) * 5 > 110)
992 have_higher_than_11mbit = 1;
993
994 rcu_read_lock();
995 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
996
997 if (chanctx_conf &&
998 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
999 have_higher_than_11mbit)
1000 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1001 else
1002 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1003 rcu_read_unlock();
1004
1005 ieee80211_set_wmm_default(sdata, true);
1006 }
1007
1008 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1009 enum ieee80211_band band)
1010 {
1011 struct ieee80211_supported_band *sband;
1012 struct ieee80211_rate *bitrates;
1013 u32 mandatory_rates;
1014 enum ieee80211_rate_flags mandatory_flag;
1015 int i;
1016
1017 sband = local->hw.wiphy->bands[band];
1018 if (WARN_ON(!sband))
1019 return 1;
1020
1021 if (band == IEEE80211_BAND_2GHZ)
1022 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1023 else
1024 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1025
1026 bitrates = sband->bitrates;
1027 mandatory_rates = 0;
1028 for (i = 0; i < sband->n_bitrates; i++)
1029 if (bitrates[i].flags & mandatory_flag)
1030 mandatory_rates |= BIT(i);
1031 return mandatory_rates;
1032 }
1033
1034 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1035 u16 transaction, u16 auth_alg, u16 status,
1036 u8 *extra, size_t extra_len, const u8 *da,
1037 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1038 u32 tx_flags)
1039 {
1040 struct ieee80211_local *local = sdata->local;
1041 struct sk_buff *skb;
1042 struct ieee80211_mgmt *mgmt;
1043 int err;
1044
1045 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1046 sizeof(*mgmt) + 6 + extra_len);
1047 if (!skb)
1048 return;
1049
1050 skb_reserve(skb, local->hw.extra_tx_headroom);
1051
1052 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1053 memset(mgmt, 0, 24 + 6);
1054 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1055 IEEE80211_STYPE_AUTH);
1056 memcpy(mgmt->da, da, ETH_ALEN);
1057 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1058 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1059 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1060 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1061 mgmt->u.auth.status_code = cpu_to_le16(status);
1062 if (extra)
1063 memcpy(skb_put(skb, extra_len), extra, extra_len);
1064
1065 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1066 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1067 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1068 WARN_ON(err);
1069 }
1070
1071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1072 tx_flags;
1073 ieee80211_tx_skb(sdata, skb);
1074 }
1075
1076 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1077 const u8 *bssid, u16 stype, u16 reason,
1078 bool send_frame, u8 *frame_buf)
1079 {
1080 struct ieee80211_local *local = sdata->local;
1081 struct sk_buff *skb;
1082 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1083
1084 /* build frame */
1085 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1086 mgmt->duration = 0; /* initialize only */
1087 mgmt->seq_ctrl = 0; /* initialize only */
1088 memcpy(mgmt->da, bssid, ETH_ALEN);
1089 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1090 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1091 /* u.deauth.reason_code == u.disassoc.reason_code */
1092 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1093
1094 if (send_frame) {
1095 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1096 IEEE80211_DEAUTH_FRAME_LEN);
1097 if (!skb)
1098 return;
1099
1100 skb_reserve(skb, local->hw.extra_tx_headroom);
1101
1102 /* copy in frame */
1103 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1104 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1105
1106 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1107 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1108 IEEE80211_SKB_CB(skb)->flags |=
1109 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1110
1111 ieee80211_tx_skb(sdata, skb);
1112 }
1113 }
1114
1115 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1116 size_t buffer_len, const u8 *ie, size_t ie_len,
1117 enum ieee80211_band band, u32 rate_mask,
1118 u8 channel)
1119 {
1120 struct ieee80211_supported_band *sband;
1121 u8 *pos = buffer, *end = buffer + buffer_len;
1122 size_t offset = 0, noffset;
1123 int supp_rates_len, i;
1124 u8 rates[32];
1125 int num_rates;
1126 int ext_rates_len;
1127
1128 sband = local->hw.wiphy->bands[band];
1129 if (WARN_ON_ONCE(!sband))
1130 return 0;
1131
1132 num_rates = 0;
1133 for (i = 0; i < sband->n_bitrates; i++) {
1134 if ((BIT(i) & rate_mask) == 0)
1135 continue; /* skip rate */
1136 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1137 }
1138
1139 supp_rates_len = min_t(int, num_rates, 8);
1140
1141 if (end - pos < 2 + supp_rates_len)
1142 goto out_err;
1143 *pos++ = WLAN_EID_SUPP_RATES;
1144 *pos++ = supp_rates_len;
1145 memcpy(pos, rates, supp_rates_len);
1146 pos += supp_rates_len;
1147
1148 /* insert "request information" if in custom IEs */
1149 if (ie && ie_len) {
1150 static const u8 before_extrates[] = {
1151 WLAN_EID_SSID,
1152 WLAN_EID_SUPP_RATES,
1153 WLAN_EID_REQUEST,
1154 };
1155 noffset = ieee80211_ie_split(ie, ie_len,
1156 before_extrates,
1157 ARRAY_SIZE(before_extrates),
1158 offset);
1159 if (end - pos < noffset - offset)
1160 goto out_err;
1161 memcpy(pos, ie + offset, noffset - offset);
1162 pos += noffset - offset;
1163 offset = noffset;
1164 }
1165
1166 ext_rates_len = num_rates - supp_rates_len;
1167 if (ext_rates_len > 0) {
1168 if (end - pos < 2 + ext_rates_len)
1169 goto out_err;
1170 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1171 *pos++ = ext_rates_len;
1172 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1173 pos += ext_rates_len;
1174 }
1175
1176 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1177 if (end - pos < 3)
1178 goto out_err;
1179 *pos++ = WLAN_EID_DS_PARAMS;
1180 *pos++ = 1;
1181 *pos++ = channel;
1182 }
1183
1184 /* insert custom IEs that go before HT */
1185 if (ie && ie_len) {
1186 static const u8 before_ht[] = {
1187 WLAN_EID_SSID,
1188 WLAN_EID_SUPP_RATES,
1189 WLAN_EID_REQUEST,
1190 WLAN_EID_EXT_SUPP_RATES,
1191 WLAN_EID_DS_PARAMS,
1192 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1193 };
1194 noffset = ieee80211_ie_split(ie, ie_len,
1195 before_ht, ARRAY_SIZE(before_ht),
1196 offset);
1197 if (end - pos < noffset - offset)
1198 goto out_err;
1199 memcpy(pos, ie + offset, noffset - offset);
1200 pos += noffset - offset;
1201 offset = noffset;
1202 }
1203
1204 if (sband->ht_cap.ht_supported) {
1205 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1206 goto out_err;
1207 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1208 sband->ht_cap.cap);
1209 }
1210
1211 /*
1212 * If adding more here, adjust code in main.c
1213 * that calculates local->scan_ies_len.
1214 */
1215
1216 /* add any remaining custom IEs */
1217 if (ie && ie_len) {
1218 noffset = ie_len;
1219 if (end - pos < noffset - offset)
1220 goto out_err;
1221 memcpy(pos, ie + offset, noffset - offset);
1222 pos += noffset - offset;
1223 }
1224
1225 if (sband->vht_cap.vht_supported) {
1226 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1227 goto out_err;
1228 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1229 sband->vht_cap.cap);
1230 }
1231
1232 return pos - buffer;
1233 out_err:
1234 WARN_ONCE(1, "not enough space for preq IEs\n");
1235 return pos - buffer;
1236 }
1237
1238 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1239 u8 *dst, u32 ratemask,
1240 struct ieee80211_channel *chan,
1241 const u8 *ssid, size_t ssid_len,
1242 const u8 *ie, size_t ie_len,
1243 bool directed)
1244 {
1245 struct ieee80211_local *local = sdata->local;
1246 struct sk_buff *skb;
1247 struct ieee80211_mgmt *mgmt;
1248 u8 chan_no;
1249 int ies_len;
1250
1251 /*
1252 * Do not send DS Channel parameter for directed probe requests
1253 * in order to maximize the chance that we get a response. Some
1254 * badly-behaved APs don't respond when this parameter is included.
1255 */
1256 if (directed)
1257 chan_no = 0;
1258 else
1259 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1260
1261 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1262 ssid, ssid_len, 100 + ie_len);
1263 if (!skb)
1264 return NULL;
1265
1266 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1267 skb_tailroom(skb),
1268 ie, ie_len, chan->band,
1269 ratemask, chan_no);
1270 skb_put(skb, ies_len);
1271
1272 if (dst) {
1273 mgmt = (struct ieee80211_mgmt *) skb->data;
1274 memcpy(mgmt->da, dst, ETH_ALEN);
1275 memcpy(mgmt->bssid, dst, ETH_ALEN);
1276 }
1277
1278 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1279
1280 return skb;
1281 }
1282
1283 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1284 const u8 *ssid, size_t ssid_len,
1285 const u8 *ie, size_t ie_len,
1286 u32 ratemask, bool directed, u32 tx_flags,
1287 struct ieee80211_channel *channel, bool scan)
1288 {
1289 struct sk_buff *skb;
1290
1291 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1292 ssid, ssid_len,
1293 ie, ie_len, directed);
1294 if (skb) {
1295 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1296 if (scan)
1297 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1298 else
1299 ieee80211_tx_skb(sdata, skb);
1300 }
1301 }
1302
1303 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1304 struct ieee802_11_elems *elems,
1305 enum ieee80211_band band, u32 *basic_rates)
1306 {
1307 struct ieee80211_supported_band *sband;
1308 struct ieee80211_rate *bitrates;
1309 size_t num_rates;
1310 u32 supp_rates;
1311 int i, j;
1312 sband = local->hw.wiphy->bands[band];
1313
1314 if (WARN_ON(!sband))
1315 return 1;
1316
1317 bitrates = sband->bitrates;
1318 num_rates = sband->n_bitrates;
1319 supp_rates = 0;
1320 for (i = 0; i < elems->supp_rates_len +
1321 elems->ext_supp_rates_len; i++) {
1322 u8 rate = 0;
1323 int own_rate;
1324 bool is_basic;
1325 if (i < elems->supp_rates_len)
1326 rate = elems->supp_rates[i];
1327 else if (elems->ext_supp_rates)
1328 rate = elems->ext_supp_rates
1329 [i - elems->supp_rates_len];
1330 own_rate = 5 * (rate & 0x7f);
1331 is_basic = !!(rate & 0x80);
1332
1333 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1334 continue;
1335
1336 for (j = 0; j < num_rates; j++) {
1337 if (bitrates[j].bitrate == own_rate) {
1338 supp_rates |= BIT(j);
1339 if (basic_rates && is_basic)
1340 *basic_rates |= BIT(j);
1341 }
1342 }
1343 }
1344 return supp_rates;
1345 }
1346
1347 void ieee80211_stop_device(struct ieee80211_local *local)
1348 {
1349 ieee80211_led_radio(local, false);
1350 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1351
1352 cancel_work_sync(&local->reconfig_filter);
1353
1354 flush_workqueue(local->workqueue);
1355 drv_stop(local);
1356 }
1357
1358 int ieee80211_reconfig(struct ieee80211_local *local)
1359 {
1360 struct ieee80211_hw *hw = &local->hw;
1361 struct ieee80211_sub_if_data *sdata;
1362 struct ieee80211_chanctx *ctx;
1363 struct sta_info *sta;
1364 int res, i;
1365 bool reconfig_due_to_wowlan = false;
1366
1367 #ifdef CONFIG_PM
1368 if (local->suspended)
1369 local->resuming = true;
1370
1371 if (local->wowlan) {
1372 local->wowlan = false;
1373 res = drv_resume(local);
1374 if (res < 0) {
1375 local->resuming = false;
1376 return res;
1377 }
1378 if (res == 0)
1379 goto wake_up;
1380 WARN_ON(res > 1);
1381 /*
1382 * res is 1, which means the driver requested
1383 * to go through a regular reset on wakeup.
1384 */
1385 reconfig_due_to_wowlan = true;
1386 }
1387 #endif
1388 /* everything else happens only if HW was up & running */
1389 if (!local->open_count)
1390 goto wake_up;
1391
1392 /*
1393 * Upon resume hardware can sometimes be goofy due to
1394 * various platform / driver / bus issues, so restarting
1395 * the device may at times not work immediately. Propagate
1396 * the error.
1397 */
1398 res = drv_start(local);
1399 if (res) {
1400 WARN(local->suspended, "Hardware became unavailable "
1401 "upon resume. This could be a software issue "
1402 "prior to suspend or a hardware issue.\n");
1403 return res;
1404 }
1405
1406 /* setup fragmentation threshold */
1407 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1408
1409 /* setup RTS threshold */
1410 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1411
1412 /* reset coverage class */
1413 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1414
1415 ieee80211_led_radio(local, true);
1416 ieee80211_mod_tpt_led_trig(local,
1417 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1418
1419 /* add interfaces */
1420 sdata = rtnl_dereference(local->monitor_sdata);
1421 if (sdata) {
1422 res = drv_add_interface(local, sdata);
1423 if (WARN_ON(res)) {
1424 rcu_assign_pointer(local->monitor_sdata, NULL);
1425 synchronize_net();
1426 kfree(sdata);
1427 }
1428 }
1429
1430 list_for_each_entry(sdata, &local->interfaces, list) {
1431 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1432 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1433 ieee80211_sdata_running(sdata))
1434 res = drv_add_interface(local, sdata);
1435 }
1436
1437 /* add channel contexts */
1438 if (local->use_chanctx) {
1439 mutex_lock(&local->chanctx_mtx);
1440 list_for_each_entry(ctx, &local->chanctx_list, list)
1441 WARN_ON(drv_add_chanctx(local, ctx));
1442 mutex_unlock(&local->chanctx_mtx);
1443 }
1444
1445 list_for_each_entry(sdata, &local->interfaces, list) {
1446 struct ieee80211_chanctx_conf *ctx_conf;
1447
1448 if (!ieee80211_sdata_running(sdata))
1449 continue;
1450
1451 mutex_lock(&local->chanctx_mtx);
1452 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1453 lockdep_is_held(&local->chanctx_mtx));
1454 if (ctx_conf) {
1455 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1456 conf);
1457 drv_assign_vif_chanctx(local, sdata, ctx);
1458 }
1459 mutex_unlock(&local->chanctx_mtx);
1460 }
1461
1462 sdata = rtnl_dereference(local->monitor_sdata);
1463 if (sdata && local->use_chanctx && ieee80211_sdata_running(sdata)) {
1464 struct ieee80211_chanctx_conf *ctx_conf;
1465
1466 mutex_lock(&local->chanctx_mtx);
1467 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1468 lockdep_is_held(&local->chanctx_mtx));
1469 if (ctx_conf) {
1470 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1471 conf);
1472 drv_assign_vif_chanctx(local, sdata, ctx);
1473 }
1474 mutex_unlock(&local->chanctx_mtx);
1475 }
1476
1477 /* add STAs back */
1478 mutex_lock(&local->sta_mtx);
1479 list_for_each_entry(sta, &local->sta_list, list) {
1480 enum ieee80211_sta_state state;
1481
1482 if (!sta->uploaded)
1483 continue;
1484
1485 /* AP-mode stations will be added later */
1486 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1487 continue;
1488
1489 for (state = IEEE80211_STA_NOTEXIST;
1490 state < sta->sta_state; state++)
1491 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1492 state + 1));
1493 }
1494 mutex_unlock(&local->sta_mtx);
1495
1496 /* reconfigure tx conf */
1497 if (hw->queues >= IEEE80211_NUM_ACS) {
1498 list_for_each_entry(sdata, &local->interfaces, list) {
1499 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1500 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1501 !ieee80211_sdata_running(sdata))
1502 continue;
1503
1504 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1505 drv_conf_tx(local, sdata, i,
1506 &sdata->tx_conf[i]);
1507 }
1508 }
1509
1510 /* reconfigure hardware */
1511 ieee80211_hw_config(local, ~0);
1512
1513 ieee80211_configure_filter(local);
1514
1515 /* Finally also reconfigure all the BSS information */
1516 list_for_each_entry(sdata, &local->interfaces, list) {
1517 u32 changed;
1518
1519 if (!ieee80211_sdata_running(sdata))
1520 continue;
1521
1522 /* common change flags for all interface types */
1523 changed = BSS_CHANGED_ERP_CTS_PROT |
1524 BSS_CHANGED_ERP_PREAMBLE |
1525 BSS_CHANGED_ERP_SLOT |
1526 BSS_CHANGED_HT |
1527 BSS_CHANGED_BASIC_RATES |
1528 BSS_CHANGED_BEACON_INT |
1529 BSS_CHANGED_BSSID |
1530 BSS_CHANGED_CQM |
1531 BSS_CHANGED_QOS |
1532 BSS_CHANGED_IDLE |
1533 BSS_CHANGED_TXPOWER;
1534
1535 #ifdef CONFIG_PM
1536 if (local->resuming && !reconfig_due_to_wowlan)
1537 sdata->vif.bss_conf = sdata->suspend_bss_conf;
1538 #endif
1539
1540 switch (sdata->vif.type) {
1541 case NL80211_IFTYPE_STATION:
1542 changed |= BSS_CHANGED_ASSOC |
1543 BSS_CHANGED_ARP_FILTER |
1544 BSS_CHANGED_PS;
1545
1546 if (sdata->u.mgd.dtim_period)
1547 changed |= BSS_CHANGED_DTIM_PERIOD;
1548
1549 mutex_lock(&sdata->u.mgd.mtx);
1550 ieee80211_bss_info_change_notify(sdata, changed);
1551 mutex_unlock(&sdata->u.mgd.mtx);
1552 break;
1553 case NL80211_IFTYPE_ADHOC:
1554 changed |= BSS_CHANGED_IBSS;
1555 /* fall through */
1556 case NL80211_IFTYPE_AP:
1557 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1558
1559 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1560 changed |= BSS_CHANGED_AP_PROBE_RESP;
1561
1562 if (rcu_access_pointer(sdata->u.ap.beacon))
1563 drv_start_ap(local, sdata);
1564 }
1565
1566 /* fall through */
1567 case NL80211_IFTYPE_MESH_POINT:
1568 if (sdata->vif.bss_conf.enable_beacon) {
1569 changed |= BSS_CHANGED_BEACON |
1570 BSS_CHANGED_BEACON_ENABLED;
1571 ieee80211_bss_info_change_notify(sdata, changed);
1572 }
1573 break;
1574 case NL80211_IFTYPE_WDS:
1575 break;
1576 case NL80211_IFTYPE_AP_VLAN:
1577 case NL80211_IFTYPE_MONITOR:
1578 /* ignore virtual */
1579 break;
1580 case NL80211_IFTYPE_P2P_DEVICE:
1581 changed = BSS_CHANGED_IDLE;
1582 break;
1583 case NL80211_IFTYPE_UNSPECIFIED:
1584 case NUM_NL80211_IFTYPES:
1585 case NL80211_IFTYPE_P2P_CLIENT:
1586 case NL80211_IFTYPE_P2P_GO:
1587 WARN_ON(1);
1588 break;
1589 }
1590 }
1591
1592 ieee80211_recalc_ps(local, -1);
1593
1594 /*
1595 * The sta might be in psm against the ap (e.g. because
1596 * this was the state before a hw restart), so we
1597 * explicitly send a null packet in order to make sure
1598 * it'll sync against the ap (and get out of psm).
1599 */
1600 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1601 list_for_each_entry(sdata, &local->interfaces, list) {
1602 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1603 continue;
1604 if (!sdata->u.mgd.associated)
1605 continue;
1606
1607 ieee80211_send_nullfunc(local, sdata, 0);
1608 }
1609 }
1610
1611 /* APs are now beaconing, add back stations */
1612 mutex_lock(&local->sta_mtx);
1613 list_for_each_entry(sta, &local->sta_list, list) {
1614 enum ieee80211_sta_state state;
1615
1616 if (!sta->uploaded)
1617 continue;
1618
1619 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1620 continue;
1621
1622 for (state = IEEE80211_STA_NOTEXIST;
1623 state < sta->sta_state; state++)
1624 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1625 state + 1));
1626 }
1627 mutex_unlock(&local->sta_mtx);
1628
1629 /* add back keys */
1630 list_for_each_entry(sdata, &local->interfaces, list)
1631 if (ieee80211_sdata_running(sdata))
1632 ieee80211_enable_keys(sdata);
1633
1634 wake_up:
1635 local->in_reconfig = false;
1636 barrier();
1637
1638 /*
1639 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1640 * sessions can be established after a resume.
1641 *
1642 * Also tear down aggregation sessions since reconfiguring
1643 * them in a hardware restart scenario is not easily done
1644 * right now, and the hardware will have lost information
1645 * about the sessions, but we and the AP still think they
1646 * are active. This is really a workaround though.
1647 */
1648 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1649 mutex_lock(&local->sta_mtx);
1650
1651 list_for_each_entry(sta, &local->sta_list, list) {
1652 ieee80211_sta_tear_down_BA_sessions(
1653 sta, AGG_STOP_LOCAL_REQUEST);
1654 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1655 }
1656
1657 mutex_unlock(&local->sta_mtx);
1658 }
1659
1660 ieee80211_wake_queues_by_reason(hw,
1661 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1662
1663 /*
1664 * If this is for hw restart things are still running.
1665 * We may want to change that later, however.
1666 */
1667 if (!local->suspended || reconfig_due_to_wowlan)
1668 drv_restart_complete(local);
1669
1670 if (!local->suspended)
1671 return 0;
1672
1673 #ifdef CONFIG_PM
1674 /* first set suspended false, then resuming */
1675 local->suspended = false;
1676 mb();
1677 local->resuming = false;
1678
1679 list_for_each_entry(sdata, &local->interfaces, list) {
1680 switch(sdata->vif.type) {
1681 case NL80211_IFTYPE_STATION:
1682 ieee80211_sta_restart(sdata);
1683 break;
1684 case NL80211_IFTYPE_ADHOC:
1685 ieee80211_ibss_restart(sdata);
1686 break;
1687 case NL80211_IFTYPE_MESH_POINT:
1688 ieee80211_mesh_restart(sdata);
1689 break;
1690 default:
1691 break;
1692 }
1693 }
1694
1695 mod_timer(&local->sta_cleanup, jiffies + 1);
1696
1697 mutex_lock(&local->sta_mtx);
1698 list_for_each_entry(sta, &local->sta_list, list)
1699 mesh_plink_restart(sta);
1700 mutex_unlock(&local->sta_mtx);
1701 #else
1702 WARN_ON(1);
1703 #endif
1704 return 0;
1705 }
1706
1707 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1708 {
1709 struct ieee80211_sub_if_data *sdata;
1710 struct ieee80211_local *local;
1711 struct ieee80211_key *key;
1712
1713 if (WARN_ON(!vif))
1714 return;
1715
1716 sdata = vif_to_sdata(vif);
1717 local = sdata->local;
1718
1719 if (WARN_ON(!local->resuming))
1720 return;
1721
1722 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1723 return;
1724
1725 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1726
1727 mutex_lock(&local->key_mtx);
1728 list_for_each_entry(key, &sdata->key_list, list)
1729 key->flags |= KEY_FLAG_TAINTED;
1730 mutex_unlock(&local->key_mtx);
1731 }
1732 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1733
1734 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1735 {
1736 struct ieee80211_local *local = sdata->local;
1737 struct ieee80211_chanctx_conf *chanctx_conf;
1738 struct ieee80211_chanctx *chanctx;
1739
1740 mutex_lock(&local->chanctx_mtx);
1741
1742 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1743 lockdep_is_held(&local->chanctx_mtx));
1744
1745 if (WARN_ON_ONCE(!chanctx_conf))
1746 goto unlock;
1747
1748 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1749 ieee80211_recalc_smps_chanctx(local, chanctx);
1750 unlock:
1751 mutex_unlock(&local->chanctx_mtx);
1752 }
1753
1754 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1755 {
1756 int i;
1757
1758 for (i = 0; i < n_ids; i++)
1759 if (ids[i] == id)
1760 return true;
1761 return false;
1762 }
1763
1764 /**
1765 * ieee80211_ie_split - split an IE buffer according to ordering
1766 *
1767 * @ies: the IE buffer
1768 * @ielen: the length of the IE buffer
1769 * @ids: an array with element IDs that are allowed before
1770 * the split
1771 * @n_ids: the size of the element ID array
1772 * @offset: offset where to start splitting in the buffer
1773 *
1774 * This function splits an IE buffer by updating the @offset
1775 * variable to point to the location where the buffer should be
1776 * split.
1777 *
1778 * It assumes that the given IE buffer is well-formed, this
1779 * has to be guaranteed by the caller!
1780 *
1781 * It also assumes that the IEs in the buffer are ordered
1782 * correctly, if not the result of using this function will not
1783 * be ordered correctly either, i.e. it does no reordering.
1784 *
1785 * The function returns the offset where the next part of the
1786 * buffer starts, which may be @ielen if the entire (remainder)
1787 * of the buffer should be used.
1788 */
1789 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1790 const u8 *ids, int n_ids, size_t offset)
1791 {
1792 size_t pos = offset;
1793
1794 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1795 pos += 2 + ies[pos + 1];
1796
1797 return pos;
1798 }
1799
1800 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1801 {
1802 size_t pos = offset;
1803
1804 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1805 pos += 2 + ies[pos + 1];
1806
1807 return pos;
1808 }
1809
1810 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1811 int rssi_min_thold,
1812 int rssi_max_thold)
1813 {
1814 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1815
1816 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1817 return;
1818
1819 /*
1820 * Scale up threshold values before storing it, as the RSSI averaging
1821 * algorithm uses a scaled up value as well. Change this scaling
1822 * factor if the RSSI averaging algorithm changes.
1823 */
1824 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1825 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1826 }
1827
1828 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1829 int rssi_min_thold,
1830 int rssi_max_thold)
1831 {
1832 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1833
1834 WARN_ON(rssi_min_thold == rssi_max_thold ||
1835 rssi_min_thold > rssi_max_thold);
1836
1837 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1838 rssi_max_thold);
1839 }
1840 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1841
1842 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1843 {
1844 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1845
1846 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1847 }
1848 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1849
1850 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1851 u16 cap)
1852 {
1853 __le16 tmp;
1854
1855 *pos++ = WLAN_EID_HT_CAPABILITY;
1856 *pos++ = sizeof(struct ieee80211_ht_cap);
1857 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1858
1859 /* capability flags */
1860 tmp = cpu_to_le16(cap);
1861 memcpy(pos, &tmp, sizeof(u16));
1862 pos += sizeof(u16);
1863
1864 /* AMPDU parameters */
1865 *pos++ = ht_cap->ampdu_factor |
1866 (ht_cap->ampdu_density <<
1867 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1868
1869 /* MCS set */
1870 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1871 pos += sizeof(ht_cap->mcs);
1872
1873 /* extended capabilities */
1874 pos += sizeof(__le16);
1875
1876 /* BF capabilities */
1877 pos += sizeof(__le32);
1878
1879 /* antenna selection */
1880 pos += sizeof(u8);
1881
1882 return pos;
1883 }
1884
1885 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1886 u32 cap)
1887 {
1888 __le32 tmp;
1889
1890 *pos++ = WLAN_EID_VHT_CAPABILITY;
1891 *pos++ = sizeof(struct ieee80211_vht_cap);
1892 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1893
1894 /* capability flags */
1895 tmp = cpu_to_le32(cap);
1896 memcpy(pos, &tmp, sizeof(u32));
1897 pos += sizeof(u32);
1898
1899 /* VHT MCS set */
1900 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1901 pos += sizeof(vht_cap->vht_mcs);
1902
1903 return pos;
1904 }
1905
1906 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1907 const struct cfg80211_chan_def *chandef,
1908 u16 prot_mode)
1909 {
1910 struct ieee80211_ht_operation *ht_oper;
1911 /* Build HT Information */
1912 *pos++ = WLAN_EID_HT_OPERATION;
1913 *pos++ = sizeof(struct ieee80211_ht_operation);
1914 ht_oper = (struct ieee80211_ht_operation *)pos;
1915 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1916 chandef->chan->center_freq);
1917 switch (chandef->width) {
1918 case NL80211_CHAN_WIDTH_160:
1919 case NL80211_CHAN_WIDTH_80P80:
1920 case NL80211_CHAN_WIDTH_80:
1921 case NL80211_CHAN_WIDTH_40:
1922 if (chandef->center_freq1 > chandef->chan->center_freq)
1923 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1924 else
1925 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1926 break;
1927 default:
1928 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1929 break;
1930 }
1931 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1932 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1933 chandef->width != NL80211_CHAN_WIDTH_20)
1934 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1935
1936 ht_oper->operation_mode = cpu_to_le16(prot_mode);
1937 ht_oper->stbc_param = 0x0000;
1938
1939 /* It seems that Basic MCS set and Supported MCS set
1940 are identical for the first 10 bytes */
1941 memset(&ht_oper->basic_set, 0, 16);
1942 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1943
1944 return pos + sizeof(struct ieee80211_ht_operation);
1945 }
1946
1947 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1948 struct ieee80211_ht_operation *ht_oper,
1949 struct cfg80211_chan_def *chandef)
1950 {
1951 enum nl80211_channel_type channel_type;
1952
1953 if (!ht_oper) {
1954 cfg80211_chandef_create(chandef, control_chan,
1955 NL80211_CHAN_NO_HT);
1956 return;
1957 }
1958
1959 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1960 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1961 channel_type = NL80211_CHAN_HT20;
1962 break;
1963 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1964 channel_type = NL80211_CHAN_HT40PLUS;
1965 break;
1966 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1967 channel_type = NL80211_CHAN_HT40MINUS;
1968 break;
1969 default:
1970 channel_type = NL80211_CHAN_NO_HT;
1971 }
1972
1973 cfg80211_chandef_create(chandef, control_chan, channel_type);
1974 }
1975
1976 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1977 struct sk_buff *skb, bool need_basic,
1978 enum ieee80211_band band)
1979 {
1980 struct ieee80211_local *local = sdata->local;
1981 struct ieee80211_supported_band *sband;
1982 int rate;
1983 u8 i, rates, *pos;
1984 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1985
1986 sband = local->hw.wiphy->bands[band];
1987 rates = sband->n_bitrates;
1988 if (rates > 8)
1989 rates = 8;
1990
1991 if (skb_tailroom(skb) < rates + 2)
1992 return -ENOMEM;
1993
1994 pos = skb_put(skb, rates + 2);
1995 *pos++ = WLAN_EID_SUPP_RATES;
1996 *pos++ = rates;
1997 for (i = 0; i < rates; i++) {
1998 u8 basic = 0;
1999 if (need_basic && basic_rates & BIT(i))
2000 basic = 0x80;
2001 rate = sband->bitrates[i].bitrate;
2002 *pos++ = basic | (u8) (rate / 5);
2003 }
2004
2005 return 0;
2006 }
2007
2008 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2009 struct sk_buff *skb, bool need_basic,
2010 enum ieee80211_band band)
2011 {
2012 struct ieee80211_local *local = sdata->local;
2013 struct ieee80211_supported_band *sband;
2014 int rate;
2015 u8 i, exrates, *pos;
2016 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2017
2018 sband = local->hw.wiphy->bands[band];
2019 exrates = sband->n_bitrates;
2020 if (exrates > 8)
2021 exrates -= 8;
2022 else
2023 exrates = 0;
2024
2025 if (skb_tailroom(skb) < exrates + 2)
2026 return -ENOMEM;
2027
2028 if (exrates) {
2029 pos = skb_put(skb, exrates + 2);
2030 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2031 *pos++ = exrates;
2032 for (i = 8; i < sband->n_bitrates; i++) {
2033 u8 basic = 0;
2034 if (need_basic && basic_rates & BIT(i))
2035 basic = 0x80;
2036 rate = sband->bitrates[i].bitrate;
2037 *pos++ = basic | (u8) (rate / 5);
2038 }
2039 }
2040 return 0;
2041 }
2042
2043 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2044 {
2045 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2047
2048 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2049 /* non-managed type inferfaces */
2050 return 0;
2051 }
2052 return ifmgd->ave_beacon_signal;
2053 }
2054 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2055
2056 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2057 {
2058 if (!mcs)
2059 return 1;
2060
2061 /* TODO: consider rx_highest */
2062
2063 if (mcs->rx_mask[3])
2064 return 4;
2065 if (mcs->rx_mask[2])
2066 return 3;
2067 if (mcs->rx_mask[1])
2068 return 2;
2069 return 1;
2070 }
2071
2072 /**
2073 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2074 * @local: mac80211 hw info struct
2075 * @status: RX status
2076 * @mpdu_len: total MPDU length (including FCS)
2077 * @mpdu_offset: offset into MPDU to calculate timestamp at
2078 *
2079 * This function calculates the RX timestamp at the given MPDU offset, taking
2080 * into account what the RX timestamp was. An offset of 0 will just normalize
2081 * the timestamp to TSF at beginning of MPDU reception.
2082 */
2083 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2084 struct ieee80211_rx_status *status,
2085 unsigned int mpdu_len,
2086 unsigned int mpdu_offset)
2087 {
2088 u64 ts = status->mactime;
2089 struct rate_info ri;
2090 u16 rate;
2091
2092 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2093 return 0;
2094
2095 memset(&ri, 0, sizeof(ri));
2096
2097 /* Fill cfg80211 rate info */
2098 if (status->flag & RX_FLAG_HT) {
2099 ri.mcs = status->rate_idx;
2100 ri.flags |= RATE_INFO_FLAGS_MCS;
2101 if (status->flag & RX_FLAG_40MHZ)
2102 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2103 if (status->flag & RX_FLAG_SHORT_GI)
2104 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2105 } else if (status->flag & RX_FLAG_VHT) {
2106 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2107 ri.mcs = status->rate_idx;
2108 ri.nss = status->vht_nss;
2109 if (status->flag & RX_FLAG_40MHZ)
2110 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2111 if (status->flag & RX_FLAG_80MHZ)
2112 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2113 if (status->flag & RX_FLAG_80P80MHZ)
2114 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2115 if (status->flag & RX_FLAG_160MHZ)
2116 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2117 if (status->flag & RX_FLAG_SHORT_GI)
2118 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2119 } else {
2120 struct ieee80211_supported_band *sband;
2121
2122 sband = local->hw.wiphy->bands[status->band];
2123 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2124 }
2125
2126 rate = cfg80211_calculate_bitrate(&ri);
2127
2128 /* rewind from end of MPDU */
2129 if (status->flag & RX_FLAG_MACTIME_END)
2130 ts -= mpdu_len * 8 * 10 / rate;
2131
2132 ts += mpdu_offset * 8 * 10 / rate;
2133
2134 return ts;
2135 }
(deprecated) Btrfs devel tree