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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
37void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
39struct 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}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48
49u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
51{
52 __le16 fc = hdr->frame_control;
53
54
55 if (len < 16)
56 return NULL;
57
58 if (ieee80211_is_data(fc)) {
59 if (len < 24)
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)
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;
91 }
92 }
93 }
94
95 return NULL;
96}
97
98void 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
109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble)
111{
112 int dur;
113
114
115
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117
118
119
120
121
122
123 if (band == IEEE80211_BAND_5GHZ || erp) {
124
125
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133
134
135
136
137 dur = 16;
138 dur += 16;
139 dur += 4;
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate);
142 } else {
143
144
145
146
147
148
149
150
151
152
153 dur = 10;
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
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}
187EXPORT_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
216 dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
217 erp, short_preamble);
218
219 dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
220 erp, short_preamble);
221
222 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
223 erp, short_preamble);
224
225 return cpu_to_le16(dur);
226}
227EXPORT_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
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
260 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
261 erp, short_preamble);
262 }
263
264 return cpu_to_le16(dur);
265}
266EXPORT_SYMBOL(ieee80211_ctstoself_duration);
267
268void 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
301static 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
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
328void 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
339void 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}
344EXPORT_SYMBOL(ieee80211_wake_queue);
345
346static 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
382void 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
393void 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}
398EXPORT_SYMBOL(ieee80211_stop_queue);
399
400void 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
420void 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
455void 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
470void ieee80211_stop_queues(struct ieee80211_hw *hw)
471{
472 ieee80211_stop_queues_by_reason(hw,
473 IEEE80211_QUEUE_STOP_REASON_DRIVER);
474}
475EXPORT_SYMBOL(ieee80211_stop_queues);
476
477int 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}
491EXPORT_SYMBOL(ieee80211_queue_stopped);
492
493void 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
508void ieee80211_wake_queues(struct ieee80211_hw *hw)
509{
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
511}
512EXPORT_SYMBOL(ieee80211_wake_queues);
513
514void ieee80211_iterate_active_interfaces(
515 struct ieee80211_hw *hw,
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 (ieee80211_sdata_running(sdata))
534 iterator(data, sdata->vif.addr,
535 &sdata->vif);
536 }
537
538 sdata = rcu_dereference_protected(local->monitor_sdata,
539 lockdep_is_held(&local->iflist_mtx));
540 if (sdata)
541 iterator(data, sdata->vif.addr, &sdata->vif);
542
543 mutex_unlock(&local->iflist_mtx);
544}
545EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
546
547void ieee80211_iterate_active_interfaces_atomic(
548 struct ieee80211_hw *hw,
549 void (*iterator)(void *data, u8 *mac,
550 struct ieee80211_vif *vif),
551 void *data)
552{
553 struct ieee80211_local *local = hw_to_local(hw);
554 struct ieee80211_sub_if_data *sdata;
555
556 rcu_read_lock();
557
558 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
559 switch (sdata->vif.type) {
560 case NL80211_IFTYPE_MONITOR:
561 case NL80211_IFTYPE_AP_VLAN:
562 continue;
563 default:
564 break;
565 }
566 if (ieee80211_sdata_running(sdata))
567 iterator(data, sdata->vif.addr,
568 &sdata->vif);
569 }
570
571 sdata = rcu_dereference(local->monitor_sdata);
572 if (sdata)
573 iterator(data, sdata->vif.addr, &sdata->vif);
574
575 rcu_read_unlock();
576}
577EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
578
579
580
581
582
583
584
585
586static bool ieee80211_can_queue_work(struct ieee80211_local *local)
587{
588 if (WARN(local->suspended && !local->resuming,
589 "queueing ieee80211 work while going to suspend\n"))
590 return false;
591
592 return true;
593}
594
595void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
596{
597 struct ieee80211_local *local = hw_to_local(hw);
598
599 if (!ieee80211_can_queue_work(local))
600 return;
601
602 queue_work(local->workqueue, work);
603}
604EXPORT_SYMBOL(ieee80211_queue_work);
605
606void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
607 struct delayed_work *dwork,
608 unsigned long delay)
609{
610 struct ieee80211_local *local = hw_to_local(hw);
611
612 if (!ieee80211_can_queue_work(local))
613 return;
614
615 queue_delayed_work(local->workqueue, dwork, delay);
616}
617EXPORT_SYMBOL(ieee80211_queue_delayed_work);
618
619u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
620 struct ieee802_11_elems *elems,
621 u64 filter, u32 crc)
622{
623 size_t left = len;
624 u8 *pos = start;
625 bool calc_crc = filter != 0;
626 DECLARE_BITMAP(seen_elems, 256);
627
628 bitmap_zero(seen_elems, 256);
629 memset(elems, 0, sizeof(*elems));
630 elems->ie_start = start;
631 elems->total_len = len;
632
633 while (left >= 2) {
634 u8 id, elen;
635 bool elem_parse_failed;
636
637 id = *pos++;
638 elen = *pos++;
639 left -= 2;
640
641 if (elen > left) {
642 elems->parse_error = true;
643 break;
644 }
645
646 switch (id) {
647 case WLAN_EID_SSID:
648 case WLAN_EID_SUPP_RATES:
649 case WLAN_EID_FH_PARAMS:
650 case WLAN_EID_DS_PARAMS:
651 case WLAN_EID_CF_PARAMS:
652 case WLAN_EID_TIM:
653 case WLAN_EID_IBSS_PARAMS:
654 case WLAN_EID_CHALLENGE:
655 case WLAN_EID_RSN:
656 case WLAN_EID_ERP_INFO:
657 case WLAN_EID_EXT_SUPP_RATES:
658 case WLAN_EID_HT_CAPABILITY:
659 case WLAN_EID_HT_OPERATION:
660 case WLAN_EID_VHT_CAPABILITY:
661 case WLAN_EID_VHT_OPERATION:
662 case WLAN_EID_MESH_ID:
663 case WLAN_EID_MESH_CONFIG:
664 case WLAN_EID_PEER_MGMT:
665 case WLAN_EID_PREQ:
666 case WLAN_EID_PREP:
667 case WLAN_EID_PERR:
668 case WLAN_EID_RANN:
669 case WLAN_EID_CHANNEL_SWITCH:
670 case WLAN_EID_EXT_CHANSWITCH_ANN:
671 case WLAN_EID_COUNTRY:
672 case WLAN_EID_PWR_CONSTRAINT:
673 case WLAN_EID_TIMEOUT_INTERVAL:
674 if (test_bit(id, seen_elems)) {
675 elems->parse_error = true;
676 left -= elen;
677 pos += elen;
678 continue;
679 }
680 break;
681 }
682
683 if (calc_crc && id < 64 && (filter & (1ULL << id)))
684 crc = crc32_be(crc, pos - 2, elen + 2);
685
686 elem_parse_failed = false;
687
688 switch (id) {
689 case WLAN_EID_SSID:
690 elems->ssid = pos;
691 elems->ssid_len = elen;
692 break;
693 case WLAN_EID_SUPP_RATES:
694 elems->supp_rates = pos;
695 elems->supp_rates_len = elen;
696 break;
697 case WLAN_EID_FH_PARAMS:
698 elems->fh_params = pos;
699 elems->fh_params_len = elen;
700 break;
701 case WLAN_EID_DS_PARAMS:
702 elems->ds_params = pos;
703 elems->ds_params_len = elen;
704 break;
705 case WLAN_EID_CF_PARAMS:
706 elems->cf_params = pos;
707 elems->cf_params_len = elen;
708 break;
709 case WLAN_EID_TIM:
710 if (elen >= sizeof(struct ieee80211_tim_ie)) {
711 elems->tim = (void *)pos;
712 elems->tim_len = elen;
713 } else
714 elem_parse_failed = true;
715 break;
716 case WLAN_EID_IBSS_PARAMS:
717 elems->ibss_params = pos;
718 elems->ibss_params_len = elen;
719 break;
720 case WLAN_EID_CHALLENGE:
721 elems->challenge = pos;
722 elems->challenge_len = elen;
723 break;
724 case WLAN_EID_VENDOR_SPECIFIC:
725 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
726 pos[2] == 0xf2) {
727
728
729 if (calc_crc)
730 crc = crc32_be(crc, pos - 2, elen + 2);
731
732 if (pos[3] == 1) {
733
734 elems->wpa = pos;
735 elems->wpa_len = elen;
736 } else if (elen >= 5 && pos[3] == 2) {
737
738 if (pos[4] == 0) {
739 elems->wmm_info = pos;
740 elems->wmm_info_len = elen;
741 } else if (pos[4] == 1) {
742 elems->wmm_param = pos;
743 elems->wmm_param_len = elen;
744 }
745 }
746 }
747 break;
748 case WLAN_EID_RSN:
749 elems->rsn = pos;
750 elems->rsn_len = elen;
751 break;
752 case WLAN_EID_ERP_INFO:
753 elems->erp_info = pos;
754 elems->erp_info_len = elen;
755 break;
756 case WLAN_EID_EXT_SUPP_RATES:
757 elems->ext_supp_rates = pos;
758 elems->ext_supp_rates_len = elen;
759 break;
760 case WLAN_EID_HT_CAPABILITY:
761 if (elen >= sizeof(struct ieee80211_ht_cap))
762 elems->ht_cap_elem = (void *)pos;
763 else
764 elem_parse_failed = true;
765 break;
766 case WLAN_EID_HT_OPERATION:
767 if (elen >= sizeof(struct ieee80211_ht_operation))
768 elems->ht_operation = (void *)pos;
769 else
770 elem_parse_failed = true;
771 break;
772 case WLAN_EID_MESH_ID:
773 elems->mesh_id = pos;
774 elems->mesh_id_len = elen;
775 break;
776 case WLAN_EID_MESH_CONFIG:
777 if (elen >= sizeof(struct ieee80211_meshconf_ie))
778 elems->mesh_config = (void *)pos;
779 else
780 elem_parse_failed = true;
781 break;
782 case WLAN_EID_PEER_MGMT:
783 elems->peering = pos;
784 elems->peering_len = elen;
785 break;
786 case WLAN_EID_PREQ:
787 elems->preq = pos;
788 elems->preq_len = elen;
789 break;
790 case WLAN_EID_PREP:
791 elems->prep = pos;
792 elems->prep_len = elen;
793 break;
794 case WLAN_EID_PERR:
795 elems->perr = pos;
796 elems->perr_len = elen;
797 break;
798 case WLAN_EID_RANN:
799 if (elen >= sizeof(struct ieee80211_rann_ie))
800 elems->rann = (void *)pos;
801 else
802 elem_parse_failed = true;
803 break;
804 case WLAN_EID_CHANNEL_SWITCH:
805 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
806 elem_parse_failed = true;
807 break;
808 }
809 elems->ch_switch_ie = (void *)pos;
810 break;
811 case WLAN_EID_QUIET:
812 if (!elems->quiet_elem) {
813 elems->quiet_elem = pos;
814 elems->quiet_elem_len = elen;
815 }
816 elems->num_of_quiet_elem++;
817 break;
818 case WLAN_EID_COUNTRY:
819 elems->country_elem = pos;
820 elems->country_elem_len = elen;
821 break;
822 case WLAN_EID_PWR_CONSTRAINT:
823 if (elen != 1) {
824 elem_parse_failed = true;
825 break;
826 }
827 elems->pwr_constr_elem = pos;
828 break;
829 case WLAN_EID_TIMEOUT_INTERVAL:
830 elems->timeout_int = pos;
831 elems->timeout_int_len = elen;
832 break;
833 default:
834 break;
835 }
836
837 if (elem_parse_failed)
838 elems->parse_error = true;
839 else
840 set_bit(id, seen_elems);
841
842 left -= elen;
843 pos += elen;
844 }
845
846 if (left != 0)
847 elems->parse_error = true;
848
849 return crc;
850}
851
852void ieee802_11_parse_elems(u8 *start, size_t len,
853 struct ieee802_11_elems *elems)
854{
855 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
856}
857
858void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
859 bool bss_notify)
860{
861 struct ieee80211_local *local = sdata->local;
862 struct ieee80211_tx_queue_params qparam;
863 int ac;
864 bool use_11b, enable_qos;
865 int aCWmin, aCWmax;
866
867 if (!local->ops->conf_tx)
868 return;
869
870 if (local->hw.queues < IEEE80211_NUM_ACS)
871 return;
872
873 memset(&qparam, 0, sizeof(qparam));
874
875 use_11b = (local->oper_channel->band == IEEE80211_BAND_2GHZ) &&
876 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
877
878
879
880
881
882
883 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
884
885 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
886
887 aCWmax = 1023;
888 if (use_11b)
889 aCWmin = 31;
890 else
891 aCWmin = 15;
892
893 if (enable_qos) {
894 switch (ac) {
895 case IEEE80211_AC_BK:
896 qparam.cw_max = aCWmax;
897 qparam.cw_min = aCWmin;
898 qparam.txop = 0;
899 qparam.aifs = 7;
900 break;
901
902 default:
903 case IEEE80211_AC_BE:
904 qparam.cw_max = aCWmax;
905 qparam.cw_min = aCWmin;
906 qparam.txop = 0;
907 qparam.aifs = 3;
908 break;
909 case IEEE80211_AC_VI:
910 qparam.cw_max = aCWmin;
911 qparam.cw_min = (aCWmin + 1) / 2 - 1;
912 if (use_11b)
913 qparam.txop = 6016/32;
914 else
915 qparam.txop = 3008/32;
916 qparam.aifs = 2;
917 break;
918 case IEEE80211_AC_VO:
919 qparam.cw_max = (aCWmin + 1) / 2 - 1;
920 qparam.cw_min = (aCWmin + 1) / 4 - 1;
921 if (use_11b)
922 qparam.txop = 3264/32;
923 else
924 qparam.txop = 1504/32;
925 qparam.aifs = 2;
926 break;
927 }
928 } else {
929
930 qparam.cw_max = aCWmax;
931 qparam.cw_min = aCWmin;
932 qparam.txop = 0;
933 qparam.aifs = 2;
934 }
935
936 qparam.uapsd = false;
937
938 sdata->tx_conf[ac] = qparam;
939 drv_conf_tx(local, sdata, ac, &qparam);
940 }
941
942 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
943 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
944 sdata->vif.bss_conf.qos = enable_qos;
945 if (bss_notify)
946 ieee80211_bss_info_change_notify(sdata,
947 BSS_CHANGED_QOS);
948 }
949}
950
951void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
952 const size_t supp_rates_len,
953 const u8 *supp_rates)
954{
955 struct ieee80211_local *local = sdata->local;
956 int i, have_higher_than_11mbit = 0;
957
958
959 for (i = 0; i < supp_rates_len; i++)
960 if ((supp_rates[i] & 0x7f) * 5 > 110)
961 have_higher_than_11mbit = 1;
962
963 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
964 have_higher_than_11mbit)
965 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
966 else
967 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
968
969 ieee80211_set_wmm_default(sdata, true);
970}
971
972u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
973 enum ieee80211_band band)
974{
975 struct ieee80211_supported_band *sband;
976 struct ieee80211_rate *bitrates;
977 u32 mandatory_rates;
978 enum ieee80211_rate_flags mandatory_flag;
979 int i;
980
981 sband = local->hw.wiphy->bands[band];
982 if (WARN_ON(!sband))
983 return 1;
984
985 if (band == IEEE80211_BAND_2GHZ)
986 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
987 else
988 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
989
990 bitrates = sband->bitrates;
991 mandatory_rates = 0;
992 for (i = 0; i < sband->n_bitrates; i++)
993 if (bitrates[i].flags & mandatory_flag)
994 mandatory_rates |= BIT(i);
995 return mandatory_rates;
996}
997
998void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
999 u16 transaction, u16 auth_alg,
1000 u8 *extra, size_t extra_len, const u8 *da,
1001 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
1002{
1003 struct ieee80211_local *local = sdata->local;
1004 struct sk_buff *skb;
1005 struct ieee80211_mgmt *mgmt;
1006 int err;
1007
1008 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1009 sizeof(*mgmt) + 6 + extra_len);
1010 if (!skb)
1011 return;
1012
1013 skb_reserve(skb, local->hw.extra_tx_headroom);
1014
1015 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1016 memset(mgmt, 0, 24 + 6);
1017 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1018 IEEE80211_STYPE_AUTH);
1019 memcpy(mgmt->da, da, ETH_ALEN);
1020 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1021 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1022 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1023 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1024 mgmt->u.auth.status_code = cpu_to_le16(0);
1025 if (extra)
1026 memcpy(skb_put(skb, extra_len), extra, extra_len);
1027
1028 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1029 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1030 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1031 WARN_ON(err);
1032 }
1033
1034 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1035 ieee80211_tx_skb(sdata, skb);
1036}
1037
1038void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1039 const u8 *bssid, u16 stype, u16 reason,
1040 bool send_frame, u8 *frame_buf)
1041{
1042 struct ieee80211_local *local = sdata->local;
1043 struct sk_buff *skb;
1044 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1045
1046
1047 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1048 mgmt->duration = 0;
1049 mgmt->seq_ctrl = 0;
1050 memcpy(mgmt->da, bssid, ETH_ALEN);
1051 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1052 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1053
1054 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1055
1056 if (send_frame) {
1057 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1058 IEEE80211_DEAUTH_FRAME_LEN);
1059 if (!skb)
1060 return;
1061
1062 skb_reserve(skb, local->hw.extra_tx_headroom);
1063
1064
1065 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1066 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1067
1068 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1069 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1070 IEEE80211_SKB_CB(skb)->flags |=
1071 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1072
1073 ieee80211_tx_skb(sdata, skb);
1074 }
1075}
1076
1077int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1078 const u8 *ie, size_t ie_len,
1079 enum ieee80211_band band, u32 rate_mask,
1080 u8 channel)
1081{
1082 struct ieee80211_supported_band *sband;
1083 u8 *pos;
1084 size_t offset = 0, noffset;
1085 int supp_rates_len, i;
1086 u8 rates[32];
1087 int num_rates;
1088 int ext_rates_len;
1089
1090 sband = local->hw.wiphy->bands[band];
1091 if (WARN_ON_ONCE(!sband))
1092 return 0;
1093
1094 pos = buffer;
1095
1096 num_rates = 0;
1097 for (i = 0; i < sband->n_bitrates; i++) {
1098 if ((BIT(i) & rate_mask) == 0)
1099 continue;
1100 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1101 }
1102
1103 supp_rates_len = min_t(int, num_rates, 8);
1104
1105 *pos++ = WLAN_EID_SUPP_RATES;
1106 *pos++ = supp_rates_len;
1107 memcpy(pos, rates, supp_rates_len);
1108 pos += supp_rates_len;
1109
1110
1111 if (ie && ie_len) {
1112 static const u8 before_extrates[] = {
1113 WLAN_EID_SSID,
1114 WLAN_EID_SUPP_RATES,
1115 WLAN_EID_REQUEST,
1116 };
1117 noffset = ieee80211_ie_split(ie, ie_len,
1118 before_extrates,
1119 ARRAY_SIZE(before_extrates),
1120 offset);
1121 memcpy(pos, ie + offset, noffset - offset);
1122 pos += noffset - offset;
1123 offset = noffset;
1124 }
1125
1126 ext_rates_len = num_rates - supp_rates_len;
1127 if (ext_rates_len > 0) {
1128 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1129 *pos++ = ext_rates_len;
1130 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1131 pos += ext_rates_len;
1132 }
1133
1134 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1135 *pos++ = WLAN_EID_DS_PARAMS;
1136 *pos++ = 1;
1137 *pos++ = channel;
1138 }
1139
1140
1141 if (ie && ie_len) {
1142 static const u8 before_ht[] = {
1143 WLAN_EID_SSID,
1144 WLAN_EID_SUPP_RATES,
1145 WLAN_EID_REQUEST,
1146 WLAN_EID_EXT_SUPP_RATES,
1147 WLAN_EID_DS_PARAMS,
1148 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1149 };
1150 noffset = ieee80211_ie_split(ie, ie_len,
1151 before_ht, ARRAY_SIZE(before_ht),
1152 offset);
1153 memcpy(pos, ie + offset, noffset - offset);
1154 pos += noffset - offset;
1155 offset = noffset;
1156 }
1157
1158 if (sband->ht_cap.ht_supported)
1159 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1160 sband->ht_cap.cap);
1161
1162
1163
1164
1165
1166
1167
1168 if (ie && ie_len) {
1169 noffset = ie_len;
1170 memcpy(pos, ie + offset, noffset - offset);
1171 pos += noffset - offset;
1172 }
1173
1174 if (sband->vht_cap.vht_supported)
1175 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1176 sband->vht_cap.cap);
1177
1178 return pos - buffer;
1179}
1180
1181struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1182 u8 *dst, u32 ratemask,
1183 struct ieee80211_channel *chan,
1184 const u8 *ssid, size_t ssid_len,
1185 const u8 *ie, size_t ie_len,
1186 bool directed)
1187{
1188 struct ieee80211_local *local = sdata->local;
1189 struct sk_buff *skb;
1190 struct ieee80211_mgmt *mgmt;
1191 size_t buf_len;
1192 u8 *buf;
1193 u8 chan_no;
1194
1195
1196 buf = kmalloc(200 + ie_len, GFP_KERNEL);
1197 if (!buf)
1198 return NULL;
1199
1200
1201
1202
1203
1204
1205 if (directed)
1206 chan_no = 0;
1207 else
1208 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1209
1210 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band,
1211 ratemask, chan_no);
1212
1213 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1214 ssid, ssid_len,
1215 buf, buf_len);
1216 if (!skb)
1217 goto out;
1218
1219 if (dst) {
1220 mgmt = (struct ieee80211_mgmt *) skb->data;
1221 memcpy(mgmt->da, dst, ETH_ALEN);
1222 memcpy(mgmt->bssid, dst, ETH_ALEN);
1223 }
1224
1225 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1226
1227 out:
1228 kfree(buf);
1229
1230 return skb;
1231}
1232
1233void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1234 const u8 *ssid, size_t ssid_len,
1235 const u8 *ie, size_t ie_len,
1236 u32 ratemask, bool directed, bool no_cck,
1237 struct ieee80211_channel *channel)
1238{
1239 struct sk_buff *skb;
1240
1241 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1242 ssid, ssid_len,
1243 ie, ie_len, directed);
1244 if (skb) {
1245 if (no_cck)
1246 IEEE80211_SKB_CB(skb)->flags |=
1247 IEEE80211_TX_CTL_NO_CCK_RATE;
1248 ieee80211_tx_skb(sdata, skb);
1249 }
1250}
1251
1252u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1253 struct ieee802_11_elems *elems,
1254 enum ieee80211_band band, u32 *basic_rates)
1255{
1256 struct ieee80211_supported_band *sband;
1257 struct ieee80211_rate *bitrates;
1258 size_t num_rates;
1259 u32 supp_rates;
1260 int i, j;
1261 sband = local->hw.wiphy->bands[band];
1262
1263 if (WARN_ON(!sband))
1264 return 1;
1265
1266 bitrates = sband->bitrates;
1267 num_rates = sband->n_bitrates;
1268 supp_rates = 0;
1269 for (i = 0; i < elems->supp_rates_len +
1270 elems->ext_supp_rates_len; i++) {
1271 u8 rate = 0;
1272 int own_rate;
1273 bool is_basic;
1274 if (i < elems->supp_rates_len)
1275 rate = elems->supp_rates[i];
1276 else if (elems->ext_supp_rates)
1277 rate = elems->ext_supp_rates
1278 [i - elems->supp_rates_len];
1279 own_rate = 5 * (rate & 0x7f);
1280 is_basic = !!(rate & 0x80);
1281
1282 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1283 continue;
1284
1285 for (j = 0; j < num_rates; j++) {
1286 if (bitrates[j].bitrate == own_rate) {
1287 supp_rates |= BIT(j);
1288 if (basic_rates && is_basic)
1289 *basic_rates |= BIT(j);
1290 }
1291 }
1292 }
1293 return supp_rates;
1294}
1295
1296void ieee80211_stop_device(struct ieee80211_local *local)
1297{
1298 ieee80211_led_radio(local, false);
1299 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1300
1301 cancel_work_sync(&local->reconfig_filter);
1302
1303 flush_workqueue(local->workqueue);
1304 drv_stop(local);
1305}
1306
1307int ieee80211_reconfig(struct ieee80211_local *local)
1308{
1309 struct ieee80211_hw *hw = &local->hw;
1310 struct ieee80211_sub_if_data *sdata;
1311 struct sta_info *sta;
1312 int res, i;
1313
1314#ifdef CONFIG_PM
1315 if (local->suspended)
1316 local->resuming = true;
1317
1318 if (local->wowlan) {
1319 local->wowlan = false;
1320 res = drv_resume(local);
1321 if (res < 0) {
1322 local->resuming = false;
1323 return res;
1324 }
1325 if (res == 0)
1326 goto wake_up;
1327 WARN_ON(res > 1);
1328
1329
1330
1331
1332 }
1333#endif
1334
1335 if (!local->open_count)
1336 goto wake_up;
1337
1338
1339
1340
1341
1342
1343
1344 res = drv_start(local);
1345 if (res) {
1346 WARN(local->suspended, "Hardware became unavailable "
1347 "upon resume. This could be a software issue "
1348 "prior to suspend or a hardware issue.\n");
1349 return res;
1350 }
1351
1352
1353 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1354
1355
1356 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1357
1358
1359 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1360
1361 ieee80211_led_radio(local, true);
1362 ieee80211_mod_tpt_led_trig(local,
1363 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1364
1365
1366 sdata = rtnl_dereference(local->monitor_sdata);
1367 if (sdata) {
1368 res = drv_add_interface(local, sdata);
1369 if (WARN_ON(res)) {
1370 rcu_assign_pointer(local->monitor_sdata, NULL);
1371 synchronize_net();
1372 kfree(sdata);
1373 }
1374 }
1375
1376 list_for_each_entry(sdata, &local->interfaces, list) {
1377 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1378 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1379 ieee80211_sdata_running(sdata))
1380 res = drv_add_interface(local, sdata);
1381 }
1382
1383
1384 mutex_lock(&local->sta_mtx);
1385 list_for_each_entry(sta, &local->sta_list, list) {
1386 enum ieee80211_sta_state state;
1387
1388 if (!sta->uploaded)
1389 continue;
1390
1391
1392 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1393 continue;
1394
1395 for (state = IEEE80211_STA_NOTEXIST;
1396 state < sta->sta_state; state++)
1397 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1398 state + 1));
1399 }
1400 mutex_unlock(&local->sta_mtx);
1401
1402
1403 if (hw->queues >= IEEE80211_NUM_ACS) {
1404 list_for_each_entry(sdata, &local->interfaces, list) {
1405 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1406 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1407 !ieee80211_sdata_running(sdata))
1408 continue;
1409
1410 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1411 drv_conf_tx(local, sdata, i,
1412 &sdata->tx_conf[i]);
1413 }
1414 }
1415
1416
1417 ieee80211_hw_config(local, ~0);
1418
1419 ieee80211_configure_filter(local);
1420
1421
1422 list_for_each_entry(sdata, &local->interfaces, list) {
1423 u32 changed;
1424
1425 if (!ieee80211_sdata_running(sdata))
1426 continue;
1427
1428
1429 changed = BSS_CHANGED_ERP_CTS_PROT |
1430 BSS_CHANGED_ERP_PREAMBLE |
1431 BSS_CHANGED_ERP_SLOT |
1432 BSS_CHANGED_HT |
1433 BSS_CHANGED_BASIC_RATES |
1434 BSS_CHANGED_BEACON_INT |
1435 BSS_CHANGED_BSSID |
1436 BSS_CHANGED_CQM |
1437 BSS_CHANGED_QOS |
1438 BSS_CHANGED_IDLE;
1439
1440 switch (sdata->vif.type) {
1441 case NL80211_IFTYPE_STATION:
1442 changed |= BSS_CHANGED_ASSOC |
1443 BSS_CHANGED_ARP_FILTER |
1444 BSS_CHANGED_PS;
1445 mutex_lock(&sdata->u.mgd.mtx);
1446 ieee80211_bss_info_change_notify(sdata, changed);
1447 mutex_unlock(&sdata->u.mgd.mtx);
1448 break;
1449 case NL80211_IFTYPE_ADHOC:
1450 changed |= BSS_CHANGED_IBSS;
1451
1452 case NL80211_IFTYPE_AP:
1453 changed |= BSS_CHANGED_SSID;
1454
1455 if (sdata->vif.type == NL80211_IFTYPE_AP)
1456 changed |= BSS_CHANGED_AP_PROBE_RESP;
1457
1458
1459 case NL80211_IFTYPE_MESH_POINT:
1460 changed |= BSS_CHANGED_BEACON |
1461 BSS_CHANGED_BEACON_ENABLED;
1462 ieee80211_bss_info_change_notify(sdata, changed);
1463 break;
1464 case NL80211_IFTYPE_WDS:
1465 break;
1466 case NL80211_IFTYPE_AP_VLAN:
1467 case NL80211_IFTYPE_MONITOR:
1468
1469 break;
1470 case NL80211_IFTYPE_P2P_DEVICE:
1471 changed = BSS_CHANGED_IDLE;
1472 break;
1473 case NL80211_IFTYPE_UNSPECIFIED:
1474 case NUM_NL80211_IFTYPES:
1475 case NL80211_IFTYPE_P2P_CLIENT:
1476 case NL80211_IFTYPE_P2P_GO:
1477 WARN_ON(1);
1478 break;
1479 }
1480 }
1481
1482 ieee80211_recalc_ps(local, -1);
1483
1484
1485
1486
1487
1488
1489
1490 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1491 list_for_each_entry(sdata, &local->interfaces, list) {
1492 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1493 continue;
1494 if (!sdata->u.mgd.associated)
1495 continue;
1496
1497 ieee80211_send_nullfunc(local, sdata, 0);
1498 }
1499 }
1500
1501
1502 mutex_lock(&local->sta_mtx);
1503 list_for_each_entry(sta, &local->sta_list, list) {
1504 enum ieee80211_sta_state state;
1505
1506 if (!sta->uploaded)
1507 continue;
1508
1509 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1510 continue;
1511
1512 for (state = IEEE80211_STA_NOTEXIST;
1513 state < sta->sta_state; state++)
1514 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1515 state + 1));
1516 }
1517 mutex_unlock(&local->sta_mtx);
1518
1519
1520 list_for_each_entry(sdata, &local->interfaces, list)
1521 if (ieee80211_sdata_running(sdata))
1522 ieee80211_enable_keys(sdata);
1523
1524 wake_up:
1525 local->in_reconfig = false;
1526 barrier();
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1539 mutex_lock(&local->sta_mtx);
1540
1541 list_for_each_entry(sta, &local->sta_list, list) {
1542 ieee80211_sta_tear_down_BA_sessions(sta, true);
1543 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1544 }
1545
1546 mutex_unlock(&local->sta_mtx);
1547 }
1548
1549 ieee80211_wake_queues_by_reason(hw,
1550 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1551
1552
1553
1554
1555
1556 if (!local->suspended)
1557 return 0;
1558
1559#ifdef CONFIG_PM
1560
1561 local->suspended = false;
1562 mb();
1563 local->resuming = false;
1564
1565 list_for_each_entry(sdata, &local->interfaces, list) {
1566 switch(sdata->vif.type) {
1567 case NL80211_IFTYPE_STATION:
1568 ieee80211_sta_restart(sdata);
1569 break;
1570 case NL80211_IFTYPE_ADHOC:
1571 ieee80211_ibss_restart(sdata);
1572 break;
1573 case NL80211_IFTYPE_MESH_POINT:
1574 ieee80211_mesh_restart(sdata);
1575 break;
1576 default:
1577 break;
1578 }
1579 }
1580
1581 mod_timer(&local->sta_cleanup, jiffies + 1);
1582
1583 mutex_lock(&local->sta_mtx);
1584 list_for_each_entry(sta, &local->sta_list, list)
1585 mesh_plink_restart(sta);
1586 mutex_unlock(&local->sta_mtx);
1587#else
1588 WARN_ON(1);
1589#endif
1590 return 0;
1591}
1592
1593void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1594{
1595 struct ieee80211_sub_if_data *sdata;
1596 struct ieee80211_local *local;
1597 struct ieee80211_key *key;
1598
1599 if (WARN_ON(!vif))
1600 return;
1601
1602 sdata = vif_to_sdata(vif);
1603 local = sdata->local;
1604
1605 if (WARN_ON(!local->resuming))
1606 return;
1607
1608 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1609 return;
1610
1611 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1612
1613 mutex_lock(&local->key_mtx);
1614 list_for_each_entry(key, &sdata->key_list, list)
1615 key->flags |= KEY_FLAG_TAINTED;
1616 mutex_unlock(&local->key_mtx);
1617}
1618EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1619
1620static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1621 enum ieee80211_smps_mode *smps_mode)
1622{
1623 if (ifmgd->associated) {
1624 *smps_mode = ifmgd->ap_smps;
1625
1626 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1627 if (ifmgd->powersave)
1628 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1629 else
1630 *smps_mode = IEEE80211_SMPS_OFF;
1631 }
1632
1633 return 1;
1634 }
1635
1636 return 0;
1637}
1638
1639void ieee80211_recalc_smps(struct ieee80211_local *local)
1640{
1641 struct ieee80211_sub_if_data *sdata;
1642 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1643 int count = 0;
1644
1645 mutex_lock(&local->iflist_mtx);
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657 list_for_each_entry(sdata, &local->interfaces, list) {
1658 if (!ieee80211_sdata_running(sdata))
1659 continue;
1660 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
1661 continue;
1662 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1663 goto set;
1664
1665 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1666
1667 if (count > 1) {
1668 smps_mode = IEEE80211_SMPS_OFF;
1669 break;
1670 }
1671 }
1672
1673 if (smps_mode == local->smps_mode)
1674 goto unlock;
1675
1676 set:
1677 local->smps_mode = smps_mode;
1678
1679 ieee80211_hw_config(local, 0);
1680 unlock:
1681 mutex_unlock(&local->iflist_mtx);
1682}
1683
1684static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1685{
1686 int i;
1687
1688 for (i = 0; i < n_ids; i++)
1689 if (ids[i] == id)
1690 return true;
1691 return false;
1692}
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1720 const u8 *ids, int n_ids, size_t offset)
1721{
1722 size_t pos = offset;
1723
1724 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1725 pos += 2 + ies[pos + 1];
1726
1727 return pos;
1728}
1729
1730size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1731{
1732 size_t pos = offset;
1733
1734 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1735 pos += 2 + ies[pos + 1];
1736
1737 return pos;
1738}
1739
1740static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1741 int rssi_min_thold,
1742 int rssi_max_thold)
1743{
1744 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1745
1746 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1747 return;
1748
1749
1750
1751
1752
1753
1754 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1755 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1756}
1757
1758void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1759 int rssi_min_thold,
1760 int rssi_max_thold)
1761{
1762 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1763
1764 WARN_ON(rssi_min_thold == rssi_max_thold ||
1765 rssi_min_thold > rssi_max_thold);
1766
1767 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1768 rssi_max_thold);
1769}
1770EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1771
1772void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1773{
1774 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1775
1776 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1777}
1778EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1779
1780u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1781 u16 cap)
1782{
1783 __le16 tmp;
1784
1785 *pos++ = WLAN_EID_HT_CAPABILITY;
1786 *pos++ = sizeof(struct ieee80211_ht_cap);
1787 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1788
1789
1790 tmp = cpu_to_le16(cap);
1791 memcpy(pos, &tmp, sizeof(u16));
1792 pos += sizeof(u16);
1793
1794
1795 *pos++ = ht_cap->ampdu_factor |
1796 (ht_cap->ampdu_density <<
1797 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1798
1799
1800 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1801 pos += sizeof(ht_cap->mcs);
1802
1803
1804 pos += sizeof(__le16);
1805
1806
1807 pos += sizeof(__le32);
1808
1809
1810 pos += sizeof(u8);
1811
1812 return pos;
1813}
1814
1815u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1816 u32 cap)
1817{
1818 __le32 tmp;
1819
1820 *pos++ = WLAN_EID_VHT_CAPABILITY;
1821 *pos++ = sizeof(struct ieee80211_vht_capabilities);
1822 memset(pos, 0, sizeof(struct ieee80211_vht_capabilities));
1823
1824
1825 tmp = cpu_to_le32(cap);
1826 memcpy(pos, &tmp, sizeof(u32));
1827 pos += sizeof(u32);
1828
1829
1830 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1831 pos += sizeof(vht_cap->vht_mcs);
1832
1833 return pos;
1834}
1835
1836u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1837 struct ieee80211_channel *channel,
1838 enum nl80211_channel_type channel_type,
1839 u16 prot_mode)
1840{
1841 struct ieee80211_ht_operation *ht_oper;
1842
1843 *pos++ = WLAN_EID_HT_OPERATION;
1844 *pos++ = sizeof(struct ieee80211_ht_operation);
1845 ht_oper = (struct ieee80211_ht_operation *)pos;
1846 ht_oper->primary_chan =
1847 ieee80211_frequency_to_channel(channel->center_freq);
1848 switch (channel_type) {
1849 case NL80211_CHAN_HT40MINUS:
1850 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1851 break;
1852 case NL80211_CHAN_HT40PLUS:
1853 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1854 break;
1855 case NL80211_CHAN_HT20:
1856 default:
1857 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1858 break;
1859 }
1860 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1861 channel_type != NL80211_CHAN_NO_HT &&
1862 channel_type != NL80211_CHAN_HT20)
1863 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1864
1865 ht_oper->operation_mode = cpu_to_le16(prot_mode);
1866 ht_oper->stbc_param = 0x0000;
1867
1868
1869
1870 memset(&ht_oper->basic_set, 0, 16);
1871 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1872
1873 return pos + sizeof(struct ieee80211_ht_operation);
1874}
1875
1876enum nl80211_channel_type
1877ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
1878{
1879 enum nl80211_channel_type channel_type;
1880
1881 if (!ht_oper)
1882 return NL80211_CHAN_NO_HT;
1883
1884 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1885 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1886 channel_type = NL80211_CHAN_HT20;
1887 break;
1888 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1889 channel_type = NL80211_CHAN_HT40PLUS;
1890 break;
1891 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1892 channel_type = NL80211_CHAN_HT40MINUS;
1893 break;
1894 default:
1895 channel_type = NL80211_CHAN_NO_HT;
1896 }
1897
1898 return channel_type;
1899}
1900
1901int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1902 struct sk_buff *skb, bool need_basic,
1903 enum ieee80211_band band)
1904{
1905 struct ieee80211_local *local = sdata->local;
1906 struct ieee80211_supported_band *sband;
1907 int rate;
1908 u8 i, rates, *pos;
1909 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1910
1911 sband = local->hw.wiphy->bands[band];
1912 rates = sband->n_bitrates;
1913 if (rates > 8)
1914 rates = 8;
1915
1916 if (skb_tailroom(skb) < rates + 2)
1917 return -ENOMEM;
1918
1919 pos = skb_put(skb, rates + 2);
1920 *pos++ = WLAN_EID_SUPP_RATES;
1921 *pos++ = rates;
1922 for (i = 0; i < rates; i++) {
1923 u8 basic = 0;
1924 if (need_basic && basic_rates & BIT(i))
1925 basic = 0x80;
1926 rate = sband->bitrates[i].bitrate;
1927 *pos++ = basic | (u8) (rate / 5);
1928 }
1929
1930 return 0;
1931}
1932
1933int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1934 struct sk_buff *skb, bool need_basic,
1935 enum ieee80211_band band)
1936{
1937 struct ieee80211_local *local = sdata->local;
1938 struct ieee80211_supported_band *sband;
1939 int rate;
1940 u8 i, exrates, *pos;
1941 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1942
1943 sband = local->hw.wiphy->bands[band];
1944 exrates = sband->n_bitrates;
1945 if (exrates > 8)
1946 exrates -= 8;
1947 else
1948 exrates = 0;
1949
1950 if (skb_tailroom(skb) < exrates + 2)
1951 return -ENOMEM;
1952
1953 if (exrates) {
1954 pos = skb_put(skb, exrates + 2);
1955 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1956 *pos++ = exrates;
1957 for (i = 8; i < sband->n_bitrates; i++) {
1958 u8 basic = 0;
1959 if (need_basic && basic_rates & BIT(i))
1960 basic = 0x80;
1961 rate = sband->bitrates[i].bitrate;
1962 *pos++ = basic | (u8) (rate / 5);
1963 }
1964 }
1965 return 0;
1966}
1967
1968int ieee80211_ave_rssi(struct ieee80211_vif *vif)
1969{
1970 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1971 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1972
1973 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
1974
1975 return 0;
1976 }
1977 return ifmgd->ave_beacon_signal;
1978}
1979EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
1980
