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>
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.
11 * utilities for mac80211
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>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 struct ieee80211_local *local;
44 local = wiphy_priv(wiphy);
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
52 __le16 fc = hdr->frame_control;
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
62 if (ieee80211_has_a4(fc))
64 if (ieee80211_has_tods(fc))
66 if (ieee80211_has_fromds(fc))
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
78 if (ieee80211_is_ctl(fc)) {
79 if (ieee80211_is_pspoll(fc))
82 if (ieee80211_is_back_req(fc)) {
84 case NL80211_IFTYPE_STATION:
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
90 break; /* fall through to the return */
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
101 struct ieee80211_hdr *hdr;
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
109 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble,
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
127 if (band == IEEE80211_BAND_5GHZ || erp) {
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
141 dur = 16; /* SIFS + signal ext */
142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
176 /* Exported duration function for driver use */
177 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
179 enum ieee80211_band band,
181 struct ieee80211_rate *rate)
183 struct ieee80211_sub_if_data *sdata;
186 bool short_preamble = false;
190 sdata = vif_to_sdata(vif);
191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
194 shift = ieee80211_vif_get_shift(vif);
197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
198 short_preamble, shift);
200 return cpu_to_le16(dur);
202 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
206 const struct ieee80211_tx_info *frame_txctl)
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
210 struct ieee80211_sub_if_data *sdata;
212 int erp, shift = 0, bitrate;
214 struct ieee80211_supported_band *sband;
216 sband = local->hw.wiphy->bands[frame_txctl->band];
218 short_preamble = false;
220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
224 sdata = vif_to_sdata(vif);
225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
228 shift = ieee80211_vif_get_shift(vif);
231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 /* Data frame duration */
237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
238 erp, short_preamble, shift);
240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
241 erp, short_preamble, shift);
243 return cpu_to_le16(dur);
245 EXPORT_SYMBOL(ieee80211_rts_duration);
247 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
250 const struct ieee80211_tx_info *frame_txctl)
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
254 struct ieee80211_sub_if_data *sdata;
256 int erp, shift = 0, bitrate;
258 struct ieee80211_supported_band *sband;
260 sband = local->hw.wiphy->bands[frame_txctl->band];
262 short_preamble = false;
264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
267 sdata = vif_to_sdata(vif);
268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
271 shift = ieee80211_vif_get_shift(vif);
274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276 /* Data frame duration */
277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
278 erp, short_preamble, shift);
279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
282 erp, short_preamble, shift);
285 return cpu_to_le16(dur);
287 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291 struct ieee80211_sub_if_data *sdata;
292 int n_acs = IEEE80211_NUM_ACS;
294 if (local->hw.queues < IEEE80211_NUM_ACS)
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
307 for (ac = 0; ac < n_acs; ac++) {
308 int ac_queue = sdata->vif.hw_queue[ac];
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
319 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
322 struct ieee80211_local *local = hw_to_local(hw);
324 trace_wake_queue(local, queue, reason);
326 if (WARN_ON(queue >= hw->queues))
329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
338 if (skb_queue_empty(&local->pending[queue])) {
340 ieee80211_propagate_queue_wake(local, queue);
343 tasklet_schedule(&local->tx_pending_tasklet);
346 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
349 struct ieee80211_local *local = hw_to_local(hw);
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
357 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
362 EXPORT_SYMBOL(ieee80211_wake_queue);
364 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
367 struct ieee80211_local *local = hw_to_local(hw);
368 struct ieee80211_sub_if_data *sdata;
369 int n_acs = IEEE80211_NUM_ACS;
371 trace_stop_queue(local, queue, reason);
373 if (WARN_ON(queue >= hw->queues))
376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
379 __set_bit(reason, &local->queue_stop_reasons[queue]);
381 if (local->hw.queues < IEEE80211_NUM_ACS)
385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
391 for (ac = 0; ac < n_acs; ac++) {
392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
400 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
403 struct ieee80211_local *local = hw_to_local(hw);
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
411 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
416 EXPORT_SYMBOL(ieee80211_stop_queue);
418 void ieee80211_add_pending_skb(struct ieee80211_local *local,
421 struct ieee80211_hw *hw = &local->hw;
423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
424 int queue = info->hw_queue;
426 if (WARN_ON(!info->control.vif)) {
427 ieee80211_free_txskb(&local->hw, skb);
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
433 __skb_queue_tail(&local->pending[queue], skb);
434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
438 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
441 struct ieee80211_hw *hw = &local->hw;
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 while ((skb = skb_dequeue(skbs))) {
448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
450 if (WARN_ON(!info->control.vif)) {
451 ieee80211_free_txskb(&local->hw, skb);
455 queue = info->hw_queue;
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
460 __skb_queue_tail(&local->pending[queue], skb);
463 for (i = 0; i < hw->queues; i++)
464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
469 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
470 unsigned long queues,
471 enum queue_stop_reason reason)
473 struct ieee80211_local *local = hw_to_local(hw);
477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
479 for_each_set_bit(i, &queues, hw->queues)
480 __ieee80211_stop_queue(hw, i, reason);
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
485 void ieee80211_stop_queues(struct ieee80211_hw *hw)
487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
490 EXPORT_SYMBOL(ieee80211_stop_queues);
492 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
494 struct ieee80211_local *local = hw_to_local(hw);
498 if (WARN_ON(queue >= hw->queues))
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
507 EXPORT_SYMBOL(ieee80211_queue_stopped);
509 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
510 unsigned long queues,
511 enum queue_stop_reason reason)
513 struct ieee80211_local *local = hw_to_local(hw);
517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
519 for_each_set_bit(i, &queues, hw->queues)
520 __ieee80211_wake_queue(hw, i, reason);
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
525 void ieee80211_wake_queues(struct ieee80211_hw *hw)
527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
530 EXPORT_SYMBOL(ieee80211_wake_queues);
532 void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
537 if (!local->ops->flush)
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
551 queues = BIT(local->hw.queues) - 1;
554 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
557 drv_flush(local, queues, false);
559 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
563 static void __iterate_active_interfaces(struct ieee80211_local *local,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
569 struct ieee80211_sub_if_data *sdata;
571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
572 switch (sdata->vif.type) {
573 case NL80211_IFTYPE_MONITOR:
574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
577 case NL80211_IFTYPE_AP_VLAN:
582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
585 if (ieee80211_sdata_running(sdata))
586 iterator(data, sdata->vif.addr,
590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
596 iterator(data, sdata->vif.addr, &sdata->vif);
599 void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
605 struct ieee80211_local *local = hw_to_local(hw);
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
609 mutex_unlock(&local->iflist_mtx);
611 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
613 void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw *hw, u32 iter_flags,
615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
619 struct ieee80211_local *local = hw_to_local(hw);
622 __iterate_active_interfaces(local, iter_flags, iterator, data);
625 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
627 void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
633 struct ieee80211_local *local = hw_to_local(hw);
637 __iterate_active_interfaces(local, iter_flags, iterator, data);
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
641 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
650 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
659 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
668 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
670 struct ieee80211_local *local = hw_to_local(hw);
672 if (!ieee80211_can_queue_work(local))
675 queue_work(local->workqueue, work);
677 EXPORT_SYMBOL(ieee80211_queue_work);
679 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
683 struct ieee80211_local *local = hw_to_local(hw);
685 if (!ieee80211_can_queue_work(local))
688 queue_delayed_work(local->workqueue, dwork, delay);
690 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
692 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
693 struct ieee802_11_elems *elems,
697 const u8 *pos = start;
698 bool calc_crc = filter != 0;
699 DECLARE_BITMAP(seen_elems, 256);
702 bitmap_zero(seen_elems, 256);
703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
709 bool elem_parse_failed;
716 elems->parse_error = true;
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
750 case WLAN_EID_CHAN_SWITCH_PARAM:
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
767 elem_parse_failed = false;
772 elems->ssid_len = elen;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
778 case WLAN_EID_DS_PARAMS:
780 elems->ds_params = pos;
782 elem_parse_failed = true;
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
789 elem_parse_failed = true;
791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
798 /* Microsoft OUI (00:50:F2) */
801 crc = crc32_be(crc, pos - 2, elen + 2);
803 if (elen >= 5 && pos[3] == 2) {
804 /* OUI Type 2 - WMM IE */
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
817 elems->rsn_len = elen;
819 case WLAN_EID_ERP_INFO:
821 elems->erp_info = pos;
823 elem_parse_failed = true;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
833 elem_parse_failed = true;
835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
839 elem_parse_failed = true;
841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
845 elem_parse_failed = true;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
851 elem_parse_failed = true;
853 case WLAN_EID_OPMODE_NOTIF:
855 elems->opmode_notif = pos;
857 elem_parse_failed = true;
859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
867 elem_parse_failed = true;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
873 case WLAN_EID_MESH_AWAKE_WINDOW:
875 elems->awake_window = (void *)pos;
879 elems->preq_len = elen;
883 elems->prep_len = elen;
887 elems->perr_len = elen;
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
893 elem_parse_failed = true;
895 case WLAN_EID_CHANNEL_SWITCH:
896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
900 elems->ch_switch_ie = (void *)pos;
902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
907 elems->ext_chansw_ie = (void *)pos;
909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
914 elems->sec_chan_offs = (void *)pos;
916 case WLAN_EID_CHAN_SWITCH_PARAM:
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
922 elems->mesh_chansw_params_ie = (void *)pos;
924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
930 elems->wide_bw_chansw_ie = (void *)pos;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
934 elem_parse_failed = true;
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
949 elem_parse_failed = true;
952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
956 case WLAN_EID_PWR_CONSTRAINT:
958 elem_parse_failed = true;
961 elems->pwr_constr_elem = pos;
963 case WLAN_EID_TIMEOUT_INTERVAL:
964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
967 elem_parse_failed = true;
973 if (elem_parse_failed)
974 elems->parse_error = true;
976 __set_bit(id, seen_elems);
983 elems->parse_error = true;
988 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
993 struct ieee80211_chanctx_conf *chanctx_conf;
995 bool use_11b, enable_qos;
998 if (!local->ops->conf_tx)
1001 if (local->hw.queues < IEEE80211_NUM_ACS)
1004 memset(&qparam, 0, sizeof(qparam));
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
1009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1043 /* never happens but let's not leave undefined */
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1055 qparam.txop = 6016/32;
1057 qparam.txop = 3008/32;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1064 qparam.txop = 3264/32;
1066 qparam.txop = 1504/32;
1072 qparam.uapsd = false;
1074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
1078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1080 sdata->vif.bss_conf.qos = enable_qos;
1082 ieee80211_bss_info_change_notify(sdata,
1087 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1088 u16 transaction, u16 auth_alg, u16 status,
1089 const u8 *extra, size_t extra_len, const u8 *da,
1090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
1103 skb_reserve(skb, local->hw.extra_tx_headroom);
1105 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1106 memset(mgmt, 0, 24 + 6);
1107 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1108 IEEE80211_STYPE_AUTH);
1109 memcpy(mgmt->da, da, ETH_ALEN);
1110 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1111 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1112 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1113 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1114 mgmt->u.auth.status_code = cpu_to_le16(status);
1116 memcpy(skb_put(skb, extra_len), extra, extra_len);
1118 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1119 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1120 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1126 ieee80211_tx_skb(sdata, skb);
1129 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1130 const u8 *bssid, u16 stype, u16 reason,
1131 bool send_frame, u8 *frame_buf)
1133 struct ieee80211_local *local = sdata->local;
1134 struct sk_buff *skb;
1135 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1139 mgmt->duration = 0; /* initialize only */
1140 mgmt->seq_ctrl = 0; /* initialize only */
1141 memcpy(mgmt->da, bssid, ETH_ALEN);
1142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1143 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1144 /* u.deauth.reason_code == u.disassoc.reason_code */
1145 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1148 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1149 IEEE80211_DEAUTH_FRAME_LEN);
1153 skb_reserve(skb, local->hw.extra_tx_headroom);
1156 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1157 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1159 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1160 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1161 IEEE80211_SKB_CB(skb)->flags |=
1162 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1164 ieee80211_tx_skb(sdata, skb);
1168 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1169 size_t buffer_len, const u8 *ie, size_t ie_len,
1170 enum ieee80211_band band, u32 rate_mask,
1171 struct cfg80211_chan_def *chandef)
1173 struct ieee80211_supported_band *sband;
1174 u8 *pos = buffer, *end = buffer + buffer_len;
1175 size_t offset = 0, noffset;
1176 int supp_rates_len, i;
1183 sband = local->hw.wiphy->bands[band];
1184 if (WARN_ON_ONCE(!sband))
1187 rate_flags = ieee80211_chandef_rate_flags(chandef);
1188 shift = ieee80211_chandef_get_shift(chandef);
1191 for (i = 0; i < sband->n_bitrates; i++) {
1192 if ((BIT(i) & rate_mask) == 0)
1193 continue; /* skip rate */
1194 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1197 rates[num_rates++] =
1198 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1202 supp_rates_len = min_t(int, num_rates, 8);
1204 if (end - pos < 2 + supp_rates_len)
1206 *pos++ = WLAN_EID_SUPP_RATES;
1207 *pos++ = supp_rates_len;
1208 memcpy(pos, rates, supp_rates_len);
1209 pos += supp_rates_len;
1211 /* insert "request information" if in custom IEs */
1213 static const u8 before_extrates[] = {
1215 WLAN_EID_SUPP_RATES,
1218 noffset = ieee80211_ie_split(ie, ie_len,
1220 ARRAY_SIZE(before_extrates),
1222 if (end - pos < noffset - offset)
1224 memcpy(pos, ie + offset, noffset - offset);
1225 pos += noffset - offset;
1229 ext_rates_len = num_rates - supp_rates_len;
1230 if (ext_rates_len > 0) {
1231 if (end - pos < 2 + ext_rates_len)
1233 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1234 *pos++ = ext_rates_len;
1235 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1236 pos += ext_rates_len;
1239 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1242 *pos++ = WLAN_EID_DS_PARAMS;
1244 *pos++ = ieee80211_frequency_to_channel(
1245 chandef->chan->center_freq);
1248 /* insert custom IEs that go before HT */
1250 static const u8 before_ht[] = {
1252 WLAN_EID_SUPP_RATES,
1254 WLAN_EID_EXT_SUPP_RATES,
1256 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1258 noffset = ieee80211_ie_split(ie, ie_len,
1259 before_ht, ARRAY_SIZE(before_ht),
1261 if (end - pos < noffset - offset)
1263 memcpy(pos, ie + offset, noffset - offset);
1264 pos += noffset - offset;
1268 if (sband->ht_cap.ht_supported) {
1269 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1271 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1276 * If adding more here, adjust code in main.c
1277 * that calculates local->scan_ies_len.
1280 /* insert custom IEs that go before VHT */
1282 static const u8 before_vht[] = {
1284 WLAN_EID_SUPP_RATES,
1286 WLAN_EID_EXT_SUPP_RATES,
1288 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1289 WLAN_EID_HT_CAPABILITY,
1290 WLAN_EID_BSS_COEX_2040,
1291 WLAN_EID_EXT_CAPABILITY,
1293 WLAN_EID_CHANNEL_USAGE,
1294 WLAN_EID_INTERWORKING,
1295 /* mesh ID can't happen here */
1296 /* 60 GHz can't happen here right now */
1298 noffset = ieee80211_ie_split(ie, ie_len,
1299 before_vht, ARRAY_SIZE(before_vht),
1301 if (end - pos < noffset - offset)
1303 memcpy(pos, ie + offset, noffset - offset);
1304 pos += noffset - offset;
1308 if (sband->vht_cap.vht_supported) {
1309 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1311 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1312 sband->vht_cap.cap);
1315 /* add any remaining custom IEs */
1318 if (end - pos < noffset - offset)
1320 memcpy(pos, ie + offset, noffset - offset);
1321 pos += noffset - offset;
1324 return pos - buffer;
1326 WARN_ONCE(1, "not enough space for preq IEs\n");
1327 return pos - buffer;
1330 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1331 u8 *dst, u32 ratemask,
1332 struct ieee80211_channel *chan,
1333 const u8 *ssid, size_t ssid_len,
1334 const u8 *ie, size_t ie_len,
1337 struct ieee80211_local *local = sdata->local;
1338 struct cfg80211_chan_def chandef;
1339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *mgmt;
1344 * Do not send DS Channel parameter for directed probe requests
1345 * in order to maximize the chance that we get a response. Some
1346 * badly-behaved APs don't respond when this parameter is included.
1348 chandef.width = sdata->vif.bss_conf.chandef.width;
1350 chandef.chan = NULL;
1352 chandef.chan = chan;
1354 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1355 ssid, ssid_len, 100 + ie_len);
1359 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1361 ie, ie_len, chan->band,
1362 ratemask, &chandef);
1363 skb_put(skb, ies_len);
1366 mgmt = (struct ieee80211_mgmt *) skb->data;
1367 memcpy(mgmt->da, dst, ETH_ALEN);
1368 memcpy(mgmt->bssid, dst, ETH_ALEN);
1371 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1376 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1377 const u8 *ssid, size_t ssid_len,
1378 const u8 *ie, size_t ie_len,
1379 u32 ratemask, bool directed, u32 tx_flags,
1380 struct ieee80211_channel *channel, bool scan)
1382 struct sk_buff *skb;
1384 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1386 ie, ie_len, directed);
1388 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1390 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1392 ieee80211_tx_skb(sdata, skb);
1396 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1397 struct ieee802_11_elems *elems,
1398 enum ieee80211_band band, u32 *basic_rates)
1400 struct ieee80211_supported_band *sband;
1402 u32 supp_rates, rate_flags;
1404 sband = sdata->local->hw.wiphy->bands[band];
1406 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1407 shift = ieee80211_vif_get_shift(&sdata->vif);
1409 if (WARN_ON(!sband))
1412 num_rates = sband->n_bitrates;
1414 for (i = 0; i < elems->supp_rates_len +
1415 elems->ext_supp_rates_len; i++) {
1419 if (i < elems->supp_rates_len)
1420 rate = elems->supp_rates[i];
1421 else if (elems->ext_supp_rates)
1422 rate = elems->ext_supp_rates
1423 [i - elems->supp_rates_len];
1424 own_rate = 5 * (rate & 0x7f);
1425 is_basic = !!(rate & 0x80);
1427 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1430 for (j = 0; j < num_rates; j++) {
1432 if ((rate_flags & sband->bitrates[j].flags)
1436 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1439 if (brate == own_rate) {
1440 supp_rates |= BIT(j);
1441 if (basic_rates && is_basic)
1442 *basic_rates |= BIT(j);
1449 void ieee80211_stop_device(struct ieee80211_local *local)
1451 ieee80211_led_radio(local, false);
1452 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1454 cancel_work_sync(&local->reconfig_filter);
1456 flush_workqueue(local->workqueue);
1460 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1461 struct ieee80211_sub_if_data *sdata)
1463 struct ieee80211_chanctx_conf *conf;
1464 struct ieee80211_chanctx *ctx;
1466 if (!local->use_chanctx)
1469 mutex_lock(&local->chanctx_mtx);
1470 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1471 lockdep_is_held(&local->chanctx_mtx));
1473 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1474 drv_assign_vif_chanctx(local, sdata, ctx);
1476 mutex_unlock(&local->chanctx_mtx);
1479 int ieee80211_reconfig(struct ieee80211_local *local)
1481 struct ieee80211_hw *hw = &local->hw;
1482 struct ieee80211_sub_if_data *sdata;
1483 struct ieee80211_chanctx *ctx;
1484 struct sta_info *sta;
1486 bool reconfig_due_to_wowlan = false;
1487 struct ieee80211_sub_if_data *sched_scan_sdata;
1488 bool sched_scan_stopped = false;
1491 if (local->suspended)
1492 local->resuming = true;
1494 if (local->wowlan) {
1495 res = drv_resume(local);
1496 local->wowlan = false;
1498 local->resuming = false;
1505 * res is 1, which means the driver requested
1506 * to go through a regular reset on wakeup.
1508 reconfig_due_to_wowlan = true;
1511 /* everything else happens only if HW was up & running */
1512 if (!local->open_count)
1516 * Upon resume hardware can sometimes be goofy due to
1517 * various platform / driver / bus issues, so restarting
1518 * the device may at times not work immediately. Propagate
1521 res = drv_start(local);
1523 WARN(local->suspended, "Hardware became unavailable "
1524 "upon resume. This could be a software issue "
1525 "prior to suspend or a hardware issue.\n");
1529 /* setup fragmentation threshold */
1530 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1532 /* setup RTS threshold */
1533 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1535 /* reset coverage class */
1536 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1538 ieee80211_led_radio(local, true);
1539 ieee80211_mod_tpt_led_trig(local,
1540 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1542 /* add interfaces */
1543 sdata = rtnl_dereference(local->monitor_sdata);
1545 /* in HW restart it exists already */
1546 WARN_ON(local->resuming);
1547 res = drv_add_interface(local, sdata);
1549 rcu_assign_pointer(local->monitor_sdata, NULL);
1555 list_for_each_entry(sdata, &local->interfaces, list) {
1556 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1557 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1558 ieee80211_sdata_running(sdata))
1559 res = drv_add_interface(local, sdata);
1562 /* add channel contexts */
1563 if (local->use_chanctx) {
1564 mutex_lock(&local->chanctx_mtx);
1565 list_for_each_entry(ctx, &local->chanctx_list, list)
1566 WARN_ON(drv_add_chanctx(local, ctx));
1567 mutex_unlock(&local->chanctx_mtx);
1570 list_for_each_entry(sdata, &local->interfaces, list) {
1571 if (!ieee80211_sdata_running(sdata))
1573 ieee80211_assign_chanctx(local, sdata);
1576 sdata = rtnl_dereference(local->monitor_sdata);
1577 if (sdata && ieee80211_sdata_running(sdata))
1578 ieee80211_assign_chanctx(local, sdata);
1581 mutex_lock(&local->sta_mtx);
1582 list_for_each_entry(sta, &local->sta_list, list) {
1583 enum ieee80211_sta_state state;
1588 /* AP-mode stations will be added later */
1589 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1592 for (state = IEEE80211_STA_NOTEXIST;
1593 state < sta->sta_state; state++)
1594 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1597 mutex_unlock(&local->sta_mtx);
1599 /* reconfigure tx conf */
1600 if (hw->queues >= IEEE80211_NUM_ACS) {
1601 list_for_each_entry(sdata, &local->interfaces, list) {
1602 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1603 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1604 !ieee80211_sdata_running(sdata))
1607 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1608 drv_conf_tx(local, sdata, i,
1609 &sdata->tx_conf[i]);
1613 /* reconfigure hardware */
1614 ieee80211_hw_config(local, ~0);
1616 ieee80211_configure_filter(local);
1618 /* Finally also reconfigure all the BSS information */
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1622 if (!ieee80211_sdata_running(sdata))
1625 /* common change flags for all interface types */
1626 changed = BSS_CHANGED_ERP_CTS_PROT |
1627 BSS_CHANGED_ERP_PREAMBLE |
1628 BSS_CHANGED_ERP_SLOT |
1630 BSS_CHANGED_BASIC_RATES |
1631 BSS_CHANGED_BEACON_INT |
1636 BSS_CHANGED_TXPOWER;
1638 switch (sdata->vif.type) {
1639 case NL80211_IFTYPE_STATION:
1640 changed |= BSS_CHANGED_ASSOC |
1641 BSS_CHANGED_ARP_FILTER |
1644 /* Re-send beacon info report to the driver */
1645 if (sdata->u.mgd.have_beacon)
1646 changed |= BSS_CHANGED_BEACON_INFO;
1649 ieee80211_bss_info_change_notify(sdata, changed);
1650 sdata_unlock(sdata);
1652 case NL80211_IFTYPE_ADHOC:
1653 changed |= BSS_CHANGED_IBSS;
1655 case NL80211_IFTYPE_AP:
1656 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1658 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1659 changed |= BSS_CHANGED_AP_PROBE_RESP;
1661 if (rcu_access_pointer(sdata->u.ap.beacon))
1662 drv_start_ap(local, sdata);
1666 case NL80211_IFTYPE_MESH_POINT:
1667 if (sdata->vif.bss_conf.enable_beacon) {
1668 changed |= BSS_CHANGED_BEACON |
1669 BSS_CHANGED_BEACON_ENABLED;
1670 ieee80211_bss_info_change_notify(sdata, changed);
1673 case NL80211_IFTYPE_WDS:
1675 case NL80211_IFTYPE_AP_VLAN:
1676 case NL80211_IFTYPE_MONITOR:
1677 /* ignore virtual */
1679 case NL80211_IFTYPE_P2P_DEVICE:
1680 changed = BSS_CHANGED_IDLE;
1682 case NL80211_IFTYPE_UNSPECIFIED:
1683 case NUM_NL80211_IFTYPES:
1684 case NL80211_IFTYPE_P2P_CLIENT:
1685 case NL80211_IFTYPE_P2P_GO:
1691 ieee80211_recalc_ps(local, -1);
1694 * The sta might be in psm against the ap (e.g. because
1695 * this was the state before a hw restart), so we
1696 * explicitly send a null packet in order to make sure
1697 * it'll sync against the ap (and get out of psm).
1699 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1700 list_for_each_entry(sdata, &local->interfaces, list) {
1701 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1703 if (!sdata->u.mgd.associated)
1706 ieee80211_send_nullfunc(local, sdata, 0);
1710 /* APs are now beaconing, add back stations */
1711 mutex_lock(&local->sta_mtx);
1712 list_for_each_entry(sta, &local->sta_list, list) {
1713 enum ieee80211_sta_state state;
1718 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1721 for (state = IEEE80211_STA_NOTEXIST;
1722 state < sta->sta_state; state++)
1723 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1726 mutex_unlock(&local->sta_mtx);
1729 list_for_each_entry(sdata, &local->interfaces, list)
1730 if (ieee80211_sdata_running(sdata))
1731 ieee80211_enable_keys(sdata);
1734 local->in_reconfig = false;
1737 if (local->monitors == local->open_count && local->monitors > 0)
1738 ieee80211_add_virtual_monitor(local);
1741 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1742 * sessions can be established after a resume.
1744 * Also tear down aggregation sessions since reconfiguring
1745 * them in a hardware restart scenario is not easily done
1746 * right now, and the hardware will have lost information
1747 * about the sessions, but we and the AP still think they
1748 * are active. This is really a workaround though.
1750 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1751 mutex_lock(&local->sta_mtx);
1753 list_for_each_entry(sta, &local->sta_list, list) {
1754 ieee80211_sta_tear_down_BA_sessions(
1755 sta, AGG_STOP_LOCAL_REQUEST);
1756 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1759 mutex_unlock(&local->sta_mtx);
1762 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1763 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1766 * Reconfigure sched scan if it was interrupted by FW restart or
1769 mutex_lock(&local->mtx);
1770 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1771 lockdep_is_held(&local->mtx));
1772 if (sched_scan_sdata && local->sched_scan_req)
1774 * Sched scan stopped, but we don't want to report it. Instead,
1775 * we're trying to reschedule.
1777 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1778 local->sched_scan_req))
1779 sched_scan_stopped = true;
1780 mutex_unlock(&local->mtx);
1782 if (sched_scan_stopped)
1783 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1786 * If this is for hw restart things are still running.
1787 * We may want to change that later, however.
1789 if (!local->suspended || reconfig_due_to_wowlan)
1790 drv_restart_complete(local);
1792 if (!local->suspended)
1796 /* first set suspended false, then resuming */
1797 local->suspended = false;
1799 local->resuming = false;
1801 list_for_each_entry(sdata, &local->interfaces, list) {
1802 if (!ieee80211_sdata_running(sdata))
1804 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1805 ieee80211_sta_restart(sdata);
1808 mod_timer(&local->sta_cleanup, jiffies + 1);
1816 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1818 struct ieee80211_sub_if_data *sdata;
1819 struct ieee80211_local *local;
1820 struct ieee80211_key *key;
1825 sdata = vif_to_sdata(vif);
1826 local = sdata->local;
1828 if (WARN_ON(!local->resuming))
1831 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1834 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1836 mutex_lock(&local->key_mtx);
1837 list_for_each_entry(key, &sdata->key_list, list)
1838 key->flags |= KEY_FLAG_TAINTED;
1839 mutex_unlock(&local->key_mtx);
1841 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1843 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1845 struct ieee80211_local *local = sdata->local;
1846 struct ieee80211_chanctx_conf *chanctx_conf;
1847 struct ieee80211_chanctx *chanctx;
1849 mutex_lock(&local->chanctx_mtx);
1851 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1852 lockdep_is_held(&local->chanctx_mtx));
1854 if (WARN_ON_ONCE(!chanctx_conf))
1857 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1858 ieee80211_recalc_smps_chanctx(local, chanctx);
1860 mutex_unlock(&local->chanctx_mtx);
1863 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1865 struct ieee80211_local *local = sdata->local;
1866 struct ieee80211_chanctx_conf *chanctx_conf;
1867 struct ieee80211_chanctx *chanctx;
1869 mutex_lock(&local->chanctx_mtx);
1871 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1872 lockdep_is_held(&local->chanctx_mtx));
1874 if (WARN_ON_ONCE(!chanctx_conf))
1877 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1878 ieee80211_recalc_chanctx_min_def(local, chanctx);
1880 mutex_unlock(&local->chanctx_mtx);
1883 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1887 for (i = 0; i < n_ids; i++)
1894 * ieee80211_ie_split - split an IE buffer according to ordering
1896 * @ies: the IE buffer
1897 * @ielen: the length of the IE buffer
1898 * @ids: an array with element IDs that are allowed before
1900 * @n_ids: the size of the element ID array
1901 * @offset: offset where to start splitting in the buffer
1903 * This function splits an IE buffer by updating the @offset
1904 * variable to point to the location where the buffer should be
1907 * It assumes that the given IE buffer is well-formed, this
1908 * has to be guaranteed by the caller!
1910 * It also assumes that the IEs in the buffer are ordered
1911 * correctly, if not the result of using this function will not
1912 * be ordered correctly either, i.e. it does no reordering.
1914 * The function returns the offset where the next part of the
1915 * buffer starts, which may be @ielen if the entire (remainder)
1916 * of the buffer should be used.
1918 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1919 const u8 *ids, int n_ids, size_t offset)
1921 size_t pos = offset;
1923 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1924 pos += 2 + ies[pos + 1];
1929 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1931 size_t pos = offset;
1933 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1934 pos += 2 + ies[pos + 1];
1939 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1943 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1945 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1949 * Scale up threshold values before storing it, as the RSSI averaging
1950 * algorithm uses a scaled up value as well. Change this scaling
1951 * factor if the RSSI averaging algorithm changes.
1953 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1954 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1957 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1961 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1963 WARN_ON(rssi_min_thold == rssi_max_thold ||
1964 rssi_min_thold > rssi_max_thold);
1966 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1969 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1971 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1973 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1975 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1977 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1979 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1984 *pos++ = WLAN_EID_HT_CAPABILITY;
1985 *pos++ = sizeof(struct ieee80211_ht_cap);
1986 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1988 /* capability flags */
1989 tmp = cpu_to_le16(cap);
1990 memcpy(pos, &tmp, sizeof(u16));
1993 /* AMPDU parameters */
1994 *pos++ = ht_cap->ampdu_factor |
1995 (ht_cap->ampdu_density <<
1996 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1999 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2000 pos += sizeof(ht_cap->mcs);
2002 /* extended capabilities */
2003 pos += sizeof(__le16);
2005 /* BF capabilities */
2006 pos += sizeof(__le32);
2008 /* antenna selection */
2014 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2019 *pos++ = WLAN_EID_VHT_CAPABILITY;
2020 *pos++ = sizeof(struct ieee80211_vht_cap);
2021 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2023 /* capability flags */
2024 tmp = cpu_to_le32(cap);
2025 memcpy(pos, &tmp, sizeof(u32));
2029 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2030 pos += sizeof(vht_cap->vht_mcs);
2035 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2036 const struct cfg80211_chan_def *chandef,
2039 struct ieee80211_ht_operation *ht_oper;
2040 /* Build HT Information */
2041 *pos++ = WLAN_EID_HT_OPERATION;
2042 *pos++ = sizeof(struct ieee80211_ht_operation);
2043 ht_oper = (struct ieee80211_ht_operation *)pos;
2044 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2045 chandef->chan->center_freq);
2046 switch (chandef->width) {
2047 case NL80211_CHAN_WIDTH_160:
2048 case NL80211_CHAN_WIDTH_80P80:
2049 case NL80211_CHAN_WIDTH_80:
2050 case NL80211_CHAN_WIDTH_40:
2051 if (chandef->center_freq1 > chandef->chan->center_freq)
2052 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2054 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2057 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2060 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2061 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2062 chandef->width != NL80211_CHAN_WIDTH_20)
2063 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2065 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2066 ht_oper->stbc_param = 0x0000;
2068 /* It seems that Basic MCS set and Supported MCS set
2069 are identical for the first 10 bytes */
2070 memset(&ht_oper->basic_set, 0, 16);
2071 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2073 return pos + sizeof(struct ieee80211_ht_operation);
2076 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2077 const struct ieee80211_ht_operation *ht_oper,
2078 struct cfg80211_chan_def *chandef)
2080 enum nl80211_channel_type channel_type;
2083 cfg80211_chandef_create(chandef, control_chan,
2084 NL80211_CHAN_NO_HT);
2088 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2089 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2090 channel_type = NL80211_CHAN_HT20;
2092 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2093 channel_type = NL80211_CHAN_HT40PLUS;
2095 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2096 channel_type = NL80211_CHAN_HT40MINUS;
2099 channel_type = NL80211_CHAN_NO_HT;
2102 cfg80211_chandef_create(chandef, control_chan, channel_type);
2105 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2106 const struct ieee80211_supported_band *sband,
2107 const u8 *srates, int srates_len, u32 *rates)
2109 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2110 int shift = ieee80211_chandef_get_shift(chandef);
2111 struct ieee80211_rate *br;
2112 int brate, rate, i, j, count = 0;
2116 for (i = 0; i < srates_len; i++) {
2117 rate = srates[i] & 0x7f;
2119 for (j = 0; j < sband->n_bitrates; j++) {
2120 br = &sband->bitrates[j];
2121 if ((rate_flags & br->flags) != rate_flags)
2124 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2125 if (brate == rate) {
2135 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2136 struct sk_buff *skb, bool need_basic,
2137 enum ieee80211_band band)
2139 struct ieee80211_local *local = sdata->local;
2140 struct ieee80211_supported_band *sband;
2143 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2146 shift = ieee80211_vif_get_shift(&sdata->vif);
2147 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2148 sband = local->hw.wiphy->bands[band];
2150 for (i = 0; i < sband->n_bitrates; i++) {
2151 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2158 if (skb_tailroom(skb) < rates + 2)
2161 pos = skb_put(skb, rates + 2);
2162 *pos++ = WLAN_EID_SUPP_RATES;
2164 for (i = 0; i < rates; i++) {
2166 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2169 if (need_basic && basic_rates & BIT(i))
2171 rate = sband->bitrates[i].bitrate;
2172 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2174 *pos++ = basic | (u8) rate;
2180 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2181 struct sk_buff *skb, bool need_basic,
2182 enum ieee80211_band band)
2184 struct ieee80211_local *local = sdata->local;
2185 struct ieee80211_supported_band *sband;
2187 u8 i, exrates, *pos;
2188 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2191 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2192 shift = ieee80211_vif_get_shift(&sdata->vif);
2194 sband = local->hw.wiphy->bands[band];
2196 for (i = 0; i < sband->n_bitrates; i++) {
2197 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2207 if (skb_tailroom(skb) < exrates + 2)
2211 pos = skb_put(skb, exrates + 2);
2212 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2214 for (i = 8; i < sband->n_bitrates; i++) {
2216 if ((rate_flags & sband->bitrates[i].flags)
2219 if (need_basic && basic_rates & BIT(i))
2221 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2223 *pos++ = basic | (u8) rate;
2229 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2231 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2234 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2235 /* non-managed type inferfaces */
2238 return ifmgd->ave_beacon_signal / 16;
2240 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2242 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2247 /* TODO: consider rx_highest */
2249 if (mcs->rx_mask[3])
2251 if (mcs->rx_mask[2])
2253 if (mcs->rx_mask[1])
2259 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2260 * @local: mac80211 hw info struct
2261 * @status: RX status
2262 * @mpdu_len: total MPDU length (including FCS)
2263 * @mpdu_offset: offset into MPDU to calculate timestamp at
2265 * This function calculates the RX timestamp at the given MPDU offset, taking
2266 * into account what the RX timestamp was. An offset of 0 will just normalize
2267 * the timestamp to TSF at beginning of MPDU reception.
2269 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2270 struct ieee80211_rx_status *status,
2271 unsigned int mpdu_len,
2272 unsigned int mpdu_offset)
2274 u64 ts = status->mactime;
2275 struct rate_info ri;
2278 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2281 memset(&ri, 0, sizeof(ri));
2283 /* Fill cfg80211 rate info */
2284 if (status->flag & RX_FLAG_HT) {
2285 ri.mcs = status->rate_idx;
2286 ri.flags |= RATE_INFO_FLAGS_MCS;
2287 if (status->flag & RX_FLAG_40MHZ)
2288 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2289 if (status->flag & RX_FLAG_SHORT_GI)
2290 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2291 } else if (status->flag & RX_FLAG_VHT) {
2292 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2293 ri.mcs = status->rate_idx;
2294 ri.nss = status->vht_nss;
2295 if (status->flag & RX_FLAG_40MHZ)
2296 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2297 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2298 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2299 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2300 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2301 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2302 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2303 if (status->flag & RX_FLAG_SHORT_GI)
2304 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2306 struct ieee80211_supported_band *sband;
2310 if (status->flag & RX_FLAG_10MHZ)
2312 if (status->flag & RX_FLAG_5MHZ)
2315 sband = local->hw.wiphy->bands[status->band];
2316 bitrate = sband->bitrates[status->rate_idx].bitrate;
2317 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2320 rate = cfg80211_calculate_bitrate(&ri);
2321 if (WARN_ONCE(!rate,
2322 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2323 status->flag, status->rate_idx, status->vht_nss))
2326 /* rewind from end of MPDU */
2327 if (status->flag & RX_FLAG_MACTIME_END)
2328 ts -= mpdu_len * 8 * 10 / rate;
2330 ts += mpdu_offset * 8 * 10 / rate;
2335 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2337 struct ieee80211_sub_if_data *sdata;
2338 struct cfg80211_chan_def chandef;
2340 mutex_lock(&local->mtx);
2341 mutex_lock(&local->iflist_mtx);
2342 list_for_each_entry(sdata, &local->interfaces, list) {
2343 /* it might be waiting for the local->mtx, but then
2344 * by the time it gets it, sdata->wdev.cac_started
2345 * will no longer be true
2347 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2349 if (sdata->wdev.cac_started) {
2350 chandef = sdata->vif.bss_conf.chandef;
2351 ieee80211_vif_release_channel(sdata);
2352 cfg80211_cac_event(sdata->dev,
2354 NL80211_RADAR_CAC_ABORTED,
2358 mutex_unlock(&local->iflist_mtx);
2359 mutex_unlock(&local->mtx);
2362 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2364 struct ieee80211_local *local =
2365 container_of(work, struct ieee80211_local, radar_detected_work);
2366 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2368 ieee80211_dfs_cac_cancel(local);
2370 if (local->use_chanctx)
2371 /* currently not handled */
2374 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2377 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2379 struct ieee80211_local *local = hw_to_local(hw);
2381 trace_api_radar_detected(local);
2383 ieee80211_queue_work(hw, &local->radar_detected_work);
2385 EXPORT_SYMBOL(ieee80211_radar_detected);
2387 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2393 case NL80211_CHAN_WIDTH_20:
2394 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2395 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2397 case NL80211_CHAN_WIDTH_40:
2398 c->width = NL80211_CHAN_WIDTH_20;
2399 c->center_freq1 = c->chan->center_freq;
2400 ret = IEEE80211_STA_DISABLE_40MHZ |
2401 IEEE80211_STA_DISABLE_VHT;
2403 case NL80211_CHAN_WIDTH_80:
2404 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2408 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2409 c->width = NL80211_CHAN_WIDTH_40;
2410 ret = IEEE80211_STA_DISABLE_VHT;
2412 case NL80211_CHAN_WIDTH_80P80:
2413 c->center_freq2 = 0;
2414 c->width = NL80211_CHAN_WIDTH_80;
2415 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2416 IEEE80211_STA_DISABLE_160MHZ;
2418 case NL80211_CHAN_WIDTH_160:
2420 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2423 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2424 c->width = NL80211_CHAN_WIDTH_80;
2425 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2426 IEEE80211_STA_DISABLE_160MHZ;
2429 case NL80211_CHAN_WIDTH_20_NOHT:
2431 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2432 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2434 case NL80211_CHAN_WIDTH_5:
2435 case NL80211_CHAN_WIDTH_10:
2438 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2442 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2448 * Returns true if smps_mode_new is strictly more restrictive than
2451 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2452 enum ieee80211_smps_mode smps_mode_new)
2454 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2455 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2458 switch (smps_mode_old) {
2459 case IEEE80211_SMPS_STATIC:
2461 case IEEE80211_SMPS_DYNAMIC:
2462 return smps_mode_new == IEEE80211_SMPS_STATIC;
2463 case IEEE80211_SMPS_OFF:
2464 return smps_mode_new != IEEE80211_SMPS_OFF;
2472 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2473 struct cfg80211_csa_settings *csa_settings)
2475 struct sk_buff *skb;
2476 struct ieee80211_mgmt *mgmt;
2477 struct ieee80211_local *local = sdata->local;
2479 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2480 sizeof(mgmt->u.action.u.chan_switch);
2483 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2484 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2487 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2488 5 + /* channel switch announcement element */
2489 3 + /* secondary channel offset element */
2490 8); /* mesh channel switch parameters element */
2494 skb_reserve(skb, local->tx_headroom);
2495 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2496 memset(mgmt, 0, hdr_len);
2497 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2498 IEEE80211_STYPE_ACTION);
2500 eth_broadcast_addr(mgmt->da);
2501 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2502 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2503 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2505 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2506 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2508 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2509 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2510 pos = skb_put(skb, 5);
2511 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2512 *pos++ = 3; /* IE length */
2513 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2514 freq = csa_settings->chandef.chan->center_freq;
2515 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2516 *pos++ = csa_settings->count; /* count */
2518 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2519 enum nl80211_channel_type ch_type;
2522 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2523 *pos++ = 1; /* IE length */
2524 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2525 if (ch_type == NL80211_CHAN_HT40PLUS)
2526 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2528 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2531 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2532 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2535 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2536 *pos++ = 6; /* IE length */
2537 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2538 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2539 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2540 *pos++ |= csa_settings->block_tx ?
2541 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2542 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2544 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2548 ieee80211_tx_skb(sdata, skb);
2552 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2554 return !(cs == NULL || cs->cipher == 0 ||
2555 cs->hdr_len < cs->pn_len + cs->pn_off ||
2556 cs->hdr_len <= cs->key_idx_off ||
2557 cs->key_idx_shift > 7 ||
2558 cs->key_idx_mask == 0);
2561 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2565 /* Ensure we have enough iftype bitmap space for all iftype values */
2566 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2568 for (i = 0; i < n; i++)
2569 if (!ieee80211_cs_valid(&cs[i]))
2575 const struct ieee80211_cipher_scheme *
2576 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2577 enum nl80211_iftype iftype)
2579 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2580 int n = local->hw.n_cipher_schemes;
2582 const struct ieee80211_cipher_scheme *cs = NULL;
2584 for (i = 0; i < n; i++) {
2585 if (l[i].cipher == cipher) {
2591 if (!cs || !(cs->iftype & BIT(iftype)))
2597 int ieee80211_cs_headroom(struct ieee80211_local *local,
2598 struct cfg80211_crypto_settings *crypto,
2599 enum nl80211_iftype iftype)
2601 const struct ieee80211_cipher_scheme *cs;
2602 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2605 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2606 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2609 if (cs && headroom < cs->hdr_len)
2610 headroom = cs->hdr_len;
2613 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2614 if (cs && headroom < cs->hdr_len)
2615 headroom = cs->hdr_len;
2621 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2623 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2629 /* End time is in the past, check for repetitions */
2630 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2631 if (data->count[i] < 255) {
2632 if (data->count[i] <= skip) {
2637 data->count[i] -= skip;
2640 data->desc[i].start += skip * data->desc[i].interval;
2646 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2652 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2655 if (!data->count[i])
2658 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2661 cur = data->desc[i].start - tsf;
2665 cur = data->desc[i].start + data->desc[i].duration - tsf;
2674 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2679 * arbitrary limit, used to avoid infinite loops when combined NoA
2680 * descriptors cover the full time period.
2684 ieee80211_extend_absent_time(data, tsf, &offset);
2686 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2690 } while (tries < max_tries);
2695 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2697 u32 next_offset = BIT(31) - 1;
2701 data->has_next_tsf = false;
2702 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2705 if (!data->count[i])
2708 ieee80211_extend_noa_desc(data, tsf, i);
2709 start = data->desc[i].start - tsf;
2711 data->absent |= BIT(i);
2713 if (next_offset > start)
2714 next_offset = start;
2716 data->has_next_tsf = true;
2720 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2722 data->next_tsf = tsf + next_offset;
2724 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2726 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2727 struct ieee80211_noa_data *data, u32 tsf)
2732 memset(data, 0, sizeof(*data));
2734 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2735 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2737 if (!desc->count || !desc->duration)
2740 data->count[i] = desc->count;
2741 data->desc[i].start = le32_to_cpu(desc->start_time);
2742 data->desc[i].duration = le32_to_cpu(desc->duration);
2743 data->desc[i].interval = le32_to_cpu(desc->interval);
2745 if (data->count[i] > 1 &&
2746 data->desc[i].interval < data->desc[i].duration)
2749 ieee80211_extend_noa_desc(data, tsf, i);
2754 ieee80211_update_p2p_noa(data, tsf);
2758 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2760 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2761 struct ieee80211_sub_if_data *sdata)
2763 u64 tsf = drv_get_tsf(local, sdata);
2765 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2766 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2770 if (tsf == -1ULL || !beacon_int || !dtim_period)
2773 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2774 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2778 ps = &sdata->bss->ps;
2779 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2780 ps = &sdata->u.mesh.ps;
2786 * actually finds last dtim_count, mac80211 will update in
2787 * __beacon_add_tim().
2788 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2790 do_div(tsf, beacon_int);
2791 bcns_from_dtim = do_div(tsf, dtim_period);
2792 /* just had a DTIM */
2793 if (!bcns_from_dtim)
2796 dtim_count = dtim_period - bcns_from_dtim;
2798 ps->dtim_count = dtim_count;