2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * utilities for mac80211
15 #include <net/mac80211.h>
16 #include <linux/netdevice.h>
17 #include <linux/export.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/bitmap.h>
24 #include <linux/crc32.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/rtnetlink.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42 struct ieee80211_local *local;
45 local = wiphy_priv(wiphy);
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
51 enum nl80211_iftype type)
53 __le16 fc = hdr->frame_control;
55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
59 if (ieee80211_is_data(fc)) {
60 if (len < 24) /* drop incorrect hdr len (data) */
63 if (ieee80211_has_a4(fc))
65 if (ieee80211_has_tods(fc))
67 if (ieee80211_has_fromds(fc))
73 if (ieee80211_is_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
83 if (ieee80211_is_back_req(fc)) {
85 case NL80211_IFTYPE_STATION:
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
91 break; /* fall through to the return */
99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
102 struct ieee80211_hdr *hdr;
104 skb_queue_walk(&tx->skbs, skb) {
105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
111 int rate, int erp, int short_preamble,
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
128 if (band == IEEE80211_BAND_5GHZ || erp) {
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
142 dur = 16; /* SIFS + signal ext */
143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
177 /* Exported duration function for driver use */
178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
180 enum ieee80211_band band,
182 struct ieee80211_rate *rate)
184 struct ieee80211_sub_if_data *sdata;
187 bool short_preamble = false;
191 sdata = vif_to_sdata(vif);
192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
195 shift = ieee80211_vif_get_shift(vif);
198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
199 short_preamble, shift);
201 return cpu_to_le16(dur);
203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
207 const struct ieee80211_tx_info *frame_txctl)
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
211 struct ieee80211_sub_if_data *sdata;
213 int erp, shift = 0, bitrate;
215 struct ieee80211_supported_band *sband;
217 sband = local->hw.wiphy->bands[frame_txctl->band];
219 short_preamble = false;
221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
225 sdata = vif_to_sdata(vif);
226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
229 shift = ieee80211_vif_get_shift(vif);
232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 /* Data frame duration */
238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
239 erp, short_preamble, shift);
241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
242 erp, short_preamble, shift);
244 return cpu_to_le16(dur);
246 EXPORT_SYMBOL(ieee80211_rts_duration);
248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
251 const struct ieee80211_tx_info *frame_txctl)
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
255 struct ieee80211_sub_if_data *sdata;
257 int erp, shift = 0, bitrate;
259 struct ieee80211_supported_band *sband;
261 sband = local->hw.wiphy->bands[frame_txctl->band];
263 short_preamble = false;
265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
268 sdata = vif_to_sdata(vif);
269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
272 shift = ieee80211_vif_get_shift(vif);
275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
277 /* Data frame duration */
278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
279 erp, short_preamble, shift);
280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
283 erp, short_preamble, shift);
286 return cpu_to_le16(dur);
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
292 struct ieee80211_sub_if_data *sdata;
293 int n_acs = IEEE80211_NUM_ACS;
295 if (local->hw.queues < IEEE80211_NUM_ACS)
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
308 for (ac = 0; ac < n_acs; ac++) {
309 int ac_queue = sdata->vif.hw_queue[ac];
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
321 enum queue_stop_reason reason,
324 struct ieee80211_local *local = hw_to_local(hw);
326 trace_wake_queue(local, queue, reason);
328 if (WARN_ON(queue >= hw->queues))
331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
335 local->q_stop_reasons[queue][reason] = 0;
337 local->q_stop_reasons[queue][reason]--;
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
346 if (skb_queue_empty(&local->pending[queue])) {
348 ieee80211_propagate_queue_wake(local, queue);
351 tasklet_schedule(&local->tx_pending_tasklet);
354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
355 enum queue_stop_reason reason,
358 struct ieee80211_local *local = hw_to_local(hw);
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
372 EXPORT_SYMBOL(ieee80211_wake_queue);
374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
378 struct ieee80211_local *local = hw_to_local(hw);
379 struct ieee80211_sub_if_data *sdata;
380 int n_acs = IEEE80211_NUM_ACS;
382 trace_stop_queue(local, queue, reason);
384 if (WARN_ON(queue >= hw->queues))
388 local->q_stop_reasons[queue][reason] = 1;
390 local->q_stop_reasons[queue][reason]++;
392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
395 if (local->hw.queues < IEEE80211_NUM_ACS)
399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
405 for (ac = 0; ac < n_acs; ac++) {
406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
415 enum queue_stop_reason reason,
418 struct ieee80211_local *local = hw_to_local(hw);
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
428 ieee80211_stop_queue_by_reason(hw, queue,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
432 EXPORT_SYMBOL(ieee80211_stop_queue);
434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
437 struct ieee80211_hw *hw = &local->hw;
439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
440 int queue = info->hw_queue;
442 if (WARN_ON(!info->control.vif)) {
443 ieee80211_free_txskb(&local->hw, skb);
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
450 __skb_queue_tail(&local->pending[queue], skb);
451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
459 struct ieee80211_hw *hw = &local->hw;
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465 while ((skb = skb_dequeue(skbs))) {
466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
468 if (WARN_ON(!info->control.vif)) {
469 ieee80211_free_txskb(&local->hw, skb);
473 queue = info->hw_queue;
475 __ieee80211_stop_queue(hw, queue,
476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
479 __skb_queue_tail(&local->pending[queue], skb);
482 for (i = 0; i < hw->queues; i++)
483 __ieee80211_wake_queue(hw, i,
484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
490 unsigned long queues,
491 enum queue_stop_reason reason,
494 struct ieee80211_local *local = hw_to_local(hw);
498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
500 for_each_set_bit(i, &queues, hw->queues)
501 __ieee80211_stop_queue(hw, i, reason, refcounted);
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
512 EXPORT_SYMBOL(ieee80211_stop_queues);
514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
516 struct ieee80211_local *local = hw_to_local(hw);
520 if (WARN_ON(queue >= hw->queues))
523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
529 EXPORT_SYMBOL(ieee80211_queue_stopped);
531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
532 unsigned long queues,
533 enum queue_stop_reason reason,
536 struct ieee80211_local *local = hw_to_local(hw);
540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
542 for_each_set_bit(i, &queues, hw->queues)
543 __ieee80211_wake_queue(hw, i, reason, refcounted);
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
554 EXPORT_SYMBOL(ieee80211_wake_queues);
557 ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
573 queues = BIT(local->hw.queues) - 1;
579 void __ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata,
581 unsigned int queues, bool drop)
583 if (!local->ops->flush)
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
590 if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
591 queues = ieee80211_get_vif_queues(local, sdata);
593 ieee80211_stop_queues_by_reason(&local->hw, queues,
594 IEEE80211_QUEUE_STOP_REASON_FLUSH,
597 drv_flush(local, sdata, queues, drop);
599 ieee80211_wake_queues_by_reason(&local->hw, queues,
600 IEEE80211_QUEUE_STOP_REASON_FLUSH,
604 void ieee80211_flush_queues(struct ieee80211_local *local,
605 struct ieee80211_sub_if_data *sdata, bool drop)
607 __ieee80211_flush_queues(local, sdata, 0, drop);
610 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
611 struct ieee80211_sub_if_data *sdata,
612 enum queue_stop_reason reason)
614 ieee80211_stop_queues_by_reason(&local->hw,
615 ieee80211_get_vif_queues(local, sdata),
619 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata,
621 enum queue_stop_reason reason)
623 ieee80211_wake_queues_by_reason(&local->hw,
624 ieee80211_get_vif_queues(local, sdata),
628 static void __iterate_active_interfaces(struct ieee80211_local *local,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
634 struct ieee80211_sub_if_data *sdata;
636 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
637 switch (sdata->vif.type) {
638 case NL80211_IFTYPE_MONITOR:
639 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
642 case NL80211_IFTYPE_AP_VLAN:
647 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
648 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
650 if (ieee80211_sdata_running(sdata))
651 iterator(data, sdata->vif.addr,
655 sdata = rcu_dereference_check(local->monitor_sdata,
656 lockdep_is_held(&local->iflist_mtx) ||
657 lockdep_rtnl_is_held());
659 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
660 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
661 iterator(data, sdata->vif.addr, &sdata->vif);
664 void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw *hw, u32 iter_flags,
666 void (*iterator)(void *data, u8 *mac,
667 struct ieee80211_vif *vif),
670 struct ieee80211_local *local = hw_to_local(hw);
672 mutex_lock(&local->iflist_mtx);
673 __iterate_active_interfaces(local, iter_flags, iterator, data);
674 mutex_unlock(&local->iflist_mtx);
676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
678 void ieee80211_iterate_active_interfaces_atomic(
679 struct ieee80211_hw *hw, u32 iter_flags,
680 void (*iterator)(void *data, u8 *mac,
681 struct ieee80211_vif *vif),
684 struct ieee80211_local *local = hw_to_local(hw);
687 __iterate_active_interfaces(local, iter_flags, iterator, data);
690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
692 void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw *hw, u32 iter_flags,
694 void (*iterator)(void *data, u8 *mac,
695 struct ieee80211_vif *vif),
698 struct ieee80211_local *local = hw_to_local(hw);
702 __iterate_active_interfaces(local, iter_flags, iterator, data);
704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
706 static void __iterate_stations(struct ieee80211_local *local,
707 void (*iterator)(void *data,
708 struct ieee80211_sta *sta),
711 struct sta_info *sta;
713 list_for_each_entry_rcu(sta, &local->sta_list, list) {
717 iterator(data, &sta->sta);
721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
722 void (*iterator)(void *data,
723 struct ieee80211_sta *sta),
726 struct ieee80211_local *local = hw_to_local(hw);
729 __iterate_stations(local, iterator, data);
732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
734 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
736 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
738 if (!ieee80211_sdata_running(sdata) ||
739 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
746 * Nothing should have been stuffed into the workqueue during
747 * the suspend->resume cycle. If this WARN is seen then there
748 * is a bug with either the driver suspend or something in
749 * mac80211 stuffing into the workqueue which we haven't yet
750 * cleared during mac80211's suspend cycle.
752 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
754 if (WARN(local->suspended && !local->resuming,
755 "queueing ieee80211 work while going to suspend\n"))
761 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
763 struct ieee80211_local *local = hw_to_local(hw);
765 if (!ieee80211_can_queue_work(local))
768 queue_work(local->workqueue, work);
770 EXPORT_SYMBOL(ieee80211_queue_work);
772 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
773 struct delayed_work *dwork,
776 struct ieee80211_local *local = hw_to_local(hw);
778 if (!ieee80211_can_queue_work(local))
781 queue_delayed_work(local->workqueue, dwork, delay);
783 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
785 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
786 struct ieee802_11_elems *elems,
790 const u8 *pos = start;
791 bool calc_crc = filter != 0;
792 DECLARE_BITMAP(seen_elems, 256);
795 bitmap_zero(seen_elems, 256);
796 memset(elems, 0, sizeof(*elems));
797 elems->ie_start = start;
798 elems->total_len = len;
802 bool elem_parse_failed;
809 elems->parse_error = true;
815 case WLAN_EID_SUPP_RATES:
816 case WLAN_EID_FH_PARAMS:
817 case WLAN_EID_DS_PARAMS:
818 case WLAN_EID_CF_PARAMS:
820 case WLAN_EID_IBSS_PARAMS:
821 case WLAN_EID_CHALLENGE:
823 case WLAN_EID_ERP_INFO:
824 case WLAN_EID_EXT_SUPP_RATES:
825 case WLAN_EID_HT_CAPABILITY:
826 case WLAN_EID_HT_OPERATION:
827 case WLAN_EID_VHT_CAPABILITY:
828 case WLAN_EID_VHT_OPERATION:
829 case WLAN_EID_MESH_ID:
830 case WLAN_EID_MESH_CONFIG:
831 case WLAN_EID_PEER_MGMT:
836 case WLAN_EID_CHANNEL_SWITCH:
837 case WLAN_EID_EXT_CHANSWITCH_ANN:
838 case WLAN_EID_COUNTRY:
839 case WLAN_EID_PWR_CONSTRAINT:
840 case WLAN_EID_TIMEOUT_INTERVAL:
841 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
842 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
843 case WLAN_EID_CHAN_SWITCH_PARAM:
844 case WLAN_EID_EXT_CAPABILITY:
845 case WLAN_EID_CHAN_SWITCH_TIMING:
846 case WLAN_EID_LINK_ID:
848 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
849 * that if the content gets bigger it might be needed more than once
851 if (test_bit(id, seen_elems)) {
852 elems->parse_error = true;
860 if (calc_crc && id < 64 && (filter & (1ULL << id)))
861 crc = crc32_be(crc, pos - 2, elen + 2);
863 elem_parse_failed = false;
866 case WLAN_EID_LINK_ID:
867 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
868 elem_parse_failed = true;
871 elems->lnk_id = (void *)(pos - 2);
873 case WLAN_EID_CHAN_SWITCH_TIMING:
874 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
875 elem_parse_failed = true;
878 elems->ch_sw_timing = (void *)pos;
880 case WLAN_EID_EXT_CAPABILITY:
881 elems->ext_capab = pos;
882 elems->ext_capab_len = elen;
886 elems->ssid_len = elen;
888 case WLAN_EID_SUPP_RATES:
889 elems->supp_rates = pos;
890 elems->supp_rates_len = elen;
892 case WLAN_EID_DS_PARAMS:
894 elems->ds_params = pos;
896 elem_parse_failed = true;
899 if (elen >= sizeof(struct ieee80211_tim_ie)) {
900 elems->tim = (void *)pos;
901 elems->tim_len = elen;
903 elem_parse_failed = true;
905 case WLAN_EID_CHALLENGE:
906 elems->challenge = pos;
907 elems->challenge_len = elen;
909 case WLAN_EID_VENDOR_SPECIFIC:
910 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
912 /* Microsoft OUI (00:50:F2) */
915 crc = crc32_be(crc, pos - 2, elen + 2);
917 if (elen >= 5 && pos[3] == 2) {
918 /* OUI Type 2 - WMM IE */
920 elems->wmm_info = pos;
921 elems->wmm_info_len = elen;
922 } else if (pos[4] == 1) {
923 elems->wmm_param = pos;
924 elems->wmm_param_len = elen;
931 elems->rsn_len = elen;
933 case WLAN_EID_ERP_INFO:
935 elems->erp_info = pos;
937 elem_parse_failed = true;
939 case WLAN_EID_EXT_SUPP_RATES:
940 elems->ext_supp_rates = pos;
941 elems->ext_supp_rates_len = elen;
943 case WLAN_EID_HT_CAPABILITY:
944 if (elen >= sizeof(struct ieee80211_ht_cap))
945 elems->ht_cap_elem = (void *)pos;
947 elem_parse_failed = true;
949 case WLAN_EID_HT_OPERATION:
950 if (elen >= sizeof(struct ieee80211_ht_operation))
951 elems->ht_operation = (void *)pos;
953 elem_parse_failed = true;
955 case WLAN_EID_VHT_CAPABILITY:
956 if (elen >= sizeof(struct ieee80211_vht_cap))
957 elems->vht_cap_elem = (void *)pos;
959 elem_parse_failed = true;
961 case WLAN_EID_VHT_OPERATION:
962 if (elen >= sizeof(struct ieee80211_vht_operation))
963 elems->vht_operation = (void *)pos;
965 elem_parse_failed = true;
967 case WLAN_EID_OPMODE_NOTIF:
969 elems->opmode_notif = pos;
971 elem_parse_failed = true;
973 case WLAN_EID_MESH_ID:
974 elems->mesh_id = pos;
975 elems->mesh_id_len = elen;
977 case WLAN_EID_MESH_CONFIG:
978 if (elen >= sizeof(struct ieee80211_meshconf_ie))
979 elems->mesh_config = (void *)pos;
981 elem_parse_failed = true;
983 case WLAN_EID_PEER_MGMT:
984 elems->peering = pos;
985 elems->peering_len = elen;
987 case WLAN_EID_MESH_AWAKE_WINDOW:
989 elems->awake_window = (void *)pos;
993 elems->preq_len = elen;
997 elems->prep_len = elen;
1001 elems->perr_len = elen;
1004 if (elen >= sizeof(struct ieee80211_rann_ie))
1005 elems->rann = (void *)pos;
1007 elem_parse_failed = true;
1009 case WLAN_EID_CHANNEL_SWITCH:
1010 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1011 elem_parse_failed = true;
1014 elems->ch_switch_ie = (void *)pos;
1016 case WLAN_EID_EXT_CHANSWITCH_ANN:
1017 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1018 elem_parse_failed = true;
1021 elems->ext_chansw_ie = (void *)pos;
1023 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1024 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1025 elem_parse_failed = true;
1028 elems->sec_chan_offs = (void *)pos;
1030 case WLAN_EID_CHAN_SWITCH_PARAM:
1032 sizeof(*elems->mesh_chansw_params_ie)) {
1033 elem_parse_failed = true;
1036 elems->mesh_chansw_params_ie = (void *)pos;
1038 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1040 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1041 elem_parse_failed = true;
1044 elems->wide_bw_chansw_ie = (void *)pos;
1046 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1048 elem_parse_failed = true;
1052 * This is a bit tricky, but as we only care about
1053 * the wide bandwidth channel switch element, so
1054 * just parse it out manually.
1056 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1059 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1060 elems->wide_bw_chansw_ie =
1063 elem_parse_failed = true;
1066 case WLAN_EID_COUNTRY:
1067 elems->country_elem = pos;
1068 elems->country_elem_len = elen;
1070 case WLAN_EID_PWR_CONSTRAINT:
1072 elem_parse_failed = true;
1075 elems->pwr_constr_elem = pos;
1077 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1078 /* Lots of different options exist, but we only care
1079 * about the Dynamic Transmit Power Control element.
1080 * First check for the Cisco OUI, then for the DTPC
1084 elem_parse_failed = true;
1088 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1089 pos[2] != 0x96 || pos[3] != 0x00)
1093 elem_parse_failed = true;
1098 crc = crc32_be(crc, pos - 2, elen + 2);
1100 elems->cisco_dtpc_elem = pos;
1102 case WLAN_EID_TIMEOUT_INTERVAL:
1103 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1104 elems->timeout_int = (void *)pos;
1106 elem_parse_failed = true;
1112 if (elem_parse_failed)
1113 elems->parse_error = true;
1115 __set_bit(id, seen_elems);
1122 elems->parse_error = true;
1127 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1130 struct ieee80211_local *local = sdata->local;
1131 struct ieee80211_tx_queue_params qparam;
1132 struct ieee80211_chanctx_conf *chanctx_conf;
1134 bool use_11b, enable_qos;
1135 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1138 if (!local->ops->conf_tx)
1141 if (local->hw.queues < IEEE80211_NUM_ACS)
1144 memset(&qparam, 0, sizeof(qparam));
1147 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148 use_11b = (chanctx_conf &&
1149 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1150 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1154 * By default disable QoS in STA mode for old access points, which do
1155 * not support 802.11e. New APs will provide proper queue parameters,
1156 * that we will configure later.
1158 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1160 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1162 /* Set defaults according to 802.11-2007 Table 7-37 */
1169 /* Confiure old 802.11b/g medium access rules. */
1170 qparam.cw_max = aCWmax;
1171 qparam.cw_min = aCWmin;
1175 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1176 /* Update if QoS is enabled. */
1179 case IEEE80211_AC_BK:
1180 qparam.cw_max = aCWmax;
1181 qparam.cw_min = aCWmin;
1188 /* never happens but let's not leave undefined */
1190 case IEEE80211_AC_BE:
1191 qparam.cw_max = aCWmax;
1192 qparam.cw_min = aCWmin;
1199 case IEEE80211_AC_VI:
1200 qparam.cw_max = aCWmin;
1201 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1205 qparam.txop = 6016/32;
1207 qparam.txop = 3008/32;
1214 case IEEE80211_AC_VO:
1215 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1216 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1220 qparam.txop = 3264/32;
1222 qparam.txop = 1504/32;
1228 qparam.uapsd = false;
1230 sdata->tx_conf[ac] = qparam;
1231 drv_conf_tx(local, sdata, ac, &qparam);
1234 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1235 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1236 sdata->vif.bss_conf.qos = enable_qos;
1238 ieee80211_bss_info_change_notify(sdata,
1243 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1244 u16 transaction, u16 auth_alg, u16 status,
1245 const u8 *extra, size_t extra_len, const u8 *da,
1246 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1249 struct ieee80211_local *local = sdata->local;
1250 struct sk_buff *skb;
1251 struct ieee80211_mgmt *mgmt;
1254 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1255 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1256 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1260 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1262 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1263 memset(mgmt, 0, 24 + 6);
1264 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265 IEEE80211_STYPE_AUTH);
1266 memcpy(mgmt->da, da, ETH_ALEN);
1267 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1268 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1269 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1270 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1271 mgmt->u.auth.status_code = cpu_to_le16(status);
1273 memcpy(skb_put(skb, extra_len), extra, extra_len);
1275 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1276 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1277 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1283 ieee80211_tx_skb(sdata, skb);
1286 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1287 const u8 *bssid, u16 stype, u16 reason,
1288 bool send_frame, u8 *frame_buf)
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff *skb;
1292 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1295 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1296 mgmt->duration = 0; /* initialize only */
1297 mgmt->seq_ctrl = 0; /* initialize only */
1298 memcpy(mgmt->da, bssid, ETH_ALEN);
1299 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1300 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1301 /* u.deauth.reason_code == u.disassoc.reason_code */
1302 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1305 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1306 IEEE80211_DEAUTH_FRAME_LEN);
1310 skb_reserve(skb, local->hw.extra_tx_headroom);
1313 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1314 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1316 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1317 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1318 IEEE80211_SKB_CB(skb)->flags |=
1319 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1321 ieee80211_tx_skb(sdata, skb);
1325 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1326 u8 *buffer, size_t buffer_len,
1327 const u8 *ie, size_t ie_len,
1328 enum ieee80211_band band,
1330 struct cfg80211_chan_def *chandef,
1333 struct ieee80211_supported_band *sband;
1334 u8 *pos = buffer, *end = buffer + buffer_len;
1336 int supp_rates_len, i;
1342 bool have_80mhz = false;
1346 sband = local->hw.wiphy->bands[band];
1347 if (WARN_ON_ONCE(!sband))
1350 rate_flags = ieee80211_chandef_rate_flags(chandef);
1351 shift = ieee80211_chandef_get_shift(chandef);
1354 for (i = 0; i < sband->n_bitrates; i++) {
1355 if ((BIT(i) & rate_mask) == 0)
1356 continue; /* skip rate */
1357 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1360 rates[num_rates++] =
1361 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1365 supp_rates_len = min_t(int, num_rates, 8);
1367 if (end - pos < 2 + supp_rates_len)
1369 *pos++ = WLAN_EID_SUPP_RATES;
1370 *pos++ = supp_rates_len;
1371 memcpy(pos, rates, supp_rates_len);
1372 pos += supp_rates_len;
1374 /* insert "request information" if in custom IEs */
1376 static const u8 before_extrates[] = {
1378 WLAN_EID_SUPP_RATES,
1381 noffset = ieee80211_ie_split(ie, ie_len,
1383 ARRAY_SIZE(before_extrates),
1385 if (end - pos < noffset - *offset)
1387 memcpy(pos, ie + *offset, noffset - *offset);
1388 pos += noffset - *offset;
1392 ext_rates_len = num_rates - supp_rates_len;
1393 if (ext_rates_len > 0) {
1394 if (end - pos < 2 + ext_rates_len)
1396 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1397 *pos++ = ext_rates_len;
1398 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1399 pos += ext_rates_len;
1402 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1405 *pos++ = WLAN_EID_DS_PARAMS;
1407 *pos++ = ieee80211_frequency_to_channel(
1408 chandef->chan->center_freq);
1411 /* insert custom IEs that go before HT */
1413 static const u8 before_ht[] = {
1415 WLAN_EID_SUPP_RATES,
1417 WLAN_EID_EXT_SUPP_RATES,
1419 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1421 noffset = ieee80211_ie_split(ie, ie_len,
1422 before_ht, ARRAY_SIZE(before_ht),
1424 if (end - pos < noffset - *offset)
1426 memcpy(pos, ie + *offset, noffset - *offset);
1427 pos += noffset - *offset;
1431 if (sband->ht_cap.ht_supported) {
1432 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1434 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1439 * If adding more here, adjust code in main.c
1440 * that calculates local->scan_ies_len.
1443 /* insert custom IEs that go before VHT */
1445 static const u8 before_vht[] = {
1447 WLAN_EID_SUPP_RATES,
1449 WLAN_EID_EXT_SUPP_RATES,
1451 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1452 WLAN_EID_HT_CAPABILITY,
1453 WLAN_EID_BSS_COEX_2040,
1454 WLAN_EID_EXT_CAPABILITY,
1456 WLAN_EID_CHANNEL_USAGE,
1457 WLAN_EID_INTERWORKING,
1458 /* mesh ID can't happen here */
1459 /* 60 GHz can't happen here right now */
1461 noffset = ieee80211_ie_split(ie, ie_len,
1462 before_vht, ARRAY_SIZE(before_vht),
1464 if (end - pos < noffset - *offset)
1466 memcpy(pos, ie + *offset, noffset - *offset);
1467 pos += noffset - *offset;
1471 /* Check if any channel in this sband supports at least 80 MHz */
1472 for (i = 0; i < sband->n_channels; i++) {
1473 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1474 IEEE80211_CHAN_NO_80MHZ))
1481 if (sband->vht_cap.vht_supported && have_80mhz) {
1482 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1484 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1485 sband->vht_cap.cap);
1488 return pos - buffer;
1490 WARN_ONCE(1, "not enough space for preq IEs\n");
1491 return pos - buffer;
1494 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1496 struct ieee80211_scan_ies *ie_desc,
1497 const u8 *ie, size_t ie_len,
1498 u8 bands_used, u32 *rate_masks,
1499 struct cfg80211_chan_def *chandef)
1501 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1504 memset(ie_desc, 0, sizeof(*ie_desc));
1506 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1507 if (bands_used & BIT(i)) {
1508 pos += ieee80211_build_preq_ies_band(local,
1515 ie_desc->ies[i] = buffer + old_pos;
1516 ie_desc->len[i] = pos - old_pos;
1521 /* add any remaining custom IEs */
1523 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1524 "not enough space for preq custom IEs\n"))
1526 memcpy(buffer + pos, ie + custom_ie_offset,
1527 ie_len - custom_ie_offset);
1528 ie_desc->common_ies = buffer + pos;
1529 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1530 pos += ie_len - custom_ie_offset;
1536 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1537 const u8 *src, const u8 *dst,
1539 struct ieee80211_channel *chan,
1540 const u8 *ssid, size_t ssid_len,
1541 const u8 *ie, size_t ie_len,
1544 struct ieee80211_local *local = sdata->local;
1545 struct cfg80211_chan_def chandef;
1546 struct sk_buff *skb;
1547 struct ieee80211_mgmt *mgmt;
1549 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1550 struct ieee80211_scan_ies dummy_ie_desc;
1553 * Do not send DS Channel parameter for directed probe requests
1554 * in order to maximize the chance that we get a response. Some
1555 * badly-behaved APs don't respond when this parameter is included.
1557 chandef.width = sdata->vif.bss_conf.chandef.width;
1559 chandef.chan = NULL;
1561 chandef.chan = chan;
1563 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1568 rate_masks[chan->band] = ratemask;
1569 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1570 skb_tailroom(skb), &dummy_ie_desc,
1571 ie, ie_len, BIT(chan->band),
1572 rate_masks, &chandef);
1573 skb_put(skb, ies_len);
1576 mgmt = (struct ieee80211_mgmt *) skb->data;
1577 memcpy(mgmt->da, dst, ETH_ALEN);
1578 memcpy(mgmt->bssid, dst, ETH_ALEN);
1581 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1586 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1587 const u8 *src, const u8 *dst,
1588 const u8 *ssid, size_t ssid_len,
1589 const u8 *ie, size_t ie_len,
1590 u32 ratemask, bool directed, u32 tx_flags,
1591 struct ieee80211_channel *channel, bool scan)
1593 struct sk_buff *skb;
1595 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1597 ie, ie_len, directed);
1599 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1601 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1603 ieee80211_tx_skb(sdata, skb);
1607 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1608 struct ieee802_11_elems *elems,
1609 enum ieee80211_band band, u32 *basic_rates)
1611 struct ieee80211_supported_band *sband;
1613 u32 supp_rates, rate_flags;
1615 sband = sdata->local->hw.wiphy->bands[band];
1617 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1618 shift = ieee80211_vif_get_shift(&sdata->vif);
1620 if (WARN_ON(!sband))
1623 num_rates = sband->n_bitrates;
1625 for (i = 0; i < elems->supp_rates_len +
1626 elems->ext_supp_rates_len; i++) {
1630 if (i < elems->supp_rates_len)
1631 rate = elems->supp_rates[i];
1632 else if (elems->ext_supp_rates)
1633 rate = elems->ext_supp_rates
1634 [i - elems->supp_rates_len];
1635 own_rate = 5 * (rate & 0x7f);
1636 is_basic = !!(rate & 0x80);
1638 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1641 for (j = 0; j < num_rates; j++) {
1643 if ((rate_flags & sband->bitrates[j].flags)
1647 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1650 if (brate == own_rate) {
1651 supp_rates |= BIT(j);
1652 if (basic_rates && is_basic)
1653 *basic_rates |= BIT(j);
1660 void ieee80211_stop_device(struct ieee80211_local *local)
1662 ieee80211_led_radio(local, false);
1663 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1665 cancel_work_sync(&local->reconfig_filter);
1667 flush_workqueue(local->workqueue);
1671 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1673 struct ieee80211_sub_if_data *sdata;
1674 struct ieee80211_chanctx *ctx;
1677 * We get here if during resume the device can't be restarted properly.
1678 * We might also get here if this happens during HW reset, which is a
1679 * slightly different situation and we need to drop all connections in
1682 * Ask cfg80211 to turn off all interfaces, this will result in more
1683 * warnings but at least we'll then get into a clean stopped state.
1686 local->resuming = false;
1687 local->suspended = false;
1688 local->started = false;
1690 /* scheduled scan clearly can't be running any more, but tell
1691 * cfg80211 and clear local state
1693 ieee80211_sched_scan_end(local);
1695 list_for_each_entry(sdata, &local->interfaces, list)
1696 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1698 /* Mark channel contexts as not being in the driver any more to avoid
1699 * removing them from the driver during the shutdown process...
1701 mutex_lock(&local->chanctx_mtx);
1702 list_for_each_entry(ctx, &local->chanctx_list, list)
1703 ctx->driver_present = false;
1704 mutex_unlock(&local->chanctx_mtx);
1706 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1709 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1710 struct ieee80211_sub_if_data *sdata)
1712 struct ieee80211_chanctx_conf *conf;
1713 struct ieee80211_chanctx *ctx;
1715 if (!local->use_chanctx)
1718 mutex_lock(&local->chanctx_mtx);
1719 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1720 lockdep_is_held(&local->chanctx_mtx));
1722 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1723 drv_assign_vif_chanctx(local, sdata, ctx);
1725 mutex_unlock(&local->chanctx_mtx);
1728 int ieee80211_reconfig(struct ieee80211_local *local)
1730 struct ieee80211_hw *hw = &local->hw;
1731 struct ieee80211_sub_if_data *sdata;
1732 struct ieee80211_chanctx *ctx;
1733 struct sta_info *sta;
1735 bool reconfig_due_to_wowlan = false;
1736 struct ieee80211_sub_if_data *sched_scan_sdata;
1737 struct cfg80211_sched_scan_request *sched_scan_req;
1738 bool sched_scan_stopped = false;
1740 /* nothing to do if HW shouldn't run */
1741 if (!local->open_count)
1745 if (local->suspended)
1746 local->resuming = true;
1748 if (local->wowlan) {
1749 res = drv_resume(local);
1750 local->wowlan = false;
1752 local->resuming = false;
1759 * res is 1, which means the driver requested
1760 * to go through a regular reset on wakeup.
1762 reconfig_due_to_wowlan = true;
1767 * Upon resume hardware can sometimes be goofy due to
1768 * various platform / driver / bus issues, so restarting
1769 * the device may at times not work immediately. Propagate
1772 res = drv_start(local);
1774 if (local->suspended)
1775 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1777 WARN(1, "Hardware became unavailable during restart.\n");
1778 ieee80211_handle_reconfig_failure(local);
1782 /* setup fragmentation threshold */
1783 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1785 /* setup RTS threshold */
1786 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1788 /* reset coverage class */
1789 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1791 ieee80211_led_radio(local, true);
1792 ieee80211_mod_tpt_led_trig(local,
1793 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1795 /* add interfaces */
1796 sdata = rtnl_dereference(local->monitor_sdata);
1798 /* in HW restart it exists already */
1799 WARN_ON(local->resuming);
1800 res = drv_add_interface(local, sdata);
1802 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1808 list_for_each_entry(sdata, &local->interfaces, list) {
1809 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1810 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1811 ieee80211_sdata_running(sdata))
1812 res = drv_add_interface(local, sdata);
1815 /* add channel contexts */
1816 if (local->use_chanctx) {
1817 mutex_lock(&local->chanctx_mtx);
1818 list_for_each_entry(ctx, &local->chanctx_list, list)
1819 if (ctx->replace_state !=
1820 IEEE80211_CHANCTX_REPLACES_OTHER)
1821 WARN_ON(drv_add_chanctx(local, ctx));
1822 mutex_unlock(&local->chanctx_mtx);
1824 list_for_each_entry(sdata, &local->interfaces, list) {
1825 if (!ieee80211_sdata_running(sdata))
1827 ieee80211_assign_chanctx(local, sdata);
1830 sdata = rtnl_dereference(local->monitor_sdata);
1831 if (sdata && ieee80211_sdata_running(sdata))
1832 ieee80211_assign_chanctx(local, sdata);
1836 mutex_lock(&local->sta_mtx);
1837 list_for_each_entry(sta, &local->sta_list, list) {
1838 enum ieee80211_sta_state state;
1843 /* AP-mode stations will be added later */
1844 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1847 for (state = IEEE80211_STA_NOTEXIST;
1848 state < sta->sta_state; state++)
1849 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1852 mutex_unlock(&local->sta_mtx);
1854 /* reconfigure tx conf */
1855 if (hw->queues >= IEEE80211_NUM_ACS) {
1856 list_for_each_entry(sdata, &local->interfaces, list) {
1857 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1858 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1859 !ieee80211_sdata_running(sdata))
1862 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1863 drv_conf_tx(local, sdata, i,
1864 &sdata->tx_conf[i]);
1868 /* reconfigure hardware */
1869 ieee80211_hw_config(local, ~0);
1871 ieee80211_configure_filter(local);
1873 /* Finally also reconfigure all the BSS information */
1874 list_for_each_entry(sdata, &local->interfaces, list) {
1877 if (!ieee80211_sdata_running(sdata))
1880 /* common change flags for all interface types */
1881 changed = BSS_CHANGED_ERP_CTS_PROT |
1882 BSS_CHANGED_ERP_PREAMBLE |
1883 BSS_CHANGED_ERP_SLOT |
1885 BSS_CHANGED_BASIC_RATES |
1886 BSS_CHANGED_BEACON_INT |
1891 BSS_CHANGED_TXPOWER;
1893 switch (sdata->vif.type) {
1894 case NL80211_IFTYPE_STATION:
1895 changed |= BSS_CHANGED_ASSOC |
1896 BSS_CHANGED_ARP_FILTER |
1899 /* Re-send beacon info report to the driver */
1900 if (sdata->u.mgd.have_beacon)
1901 changed |= BSS_CHANGED_BEACON_INFO;
1904 ieee80211_bss_info_change_notify(sdata, changed);
1905 sdata_unlock(sdata);
1907 case NL80211_IFTYPE_OCB:
1908 changed |= BSS_CHANGED_OCB;
1909 ieee80211_bss_info_change_notify(sdata, changed);
1911 case NL80211_IFTYPE_ADHOC:
1912 changed |= BSS_CHANGED_IBSS;
1914 case NL80211_IFTYPE_AP:
1915 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1917 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1918 changed |= BSS_CHANGED_AP_PROBE_RESP;
1920 if (rcu_access_pointer(sdata->u.ap.beacon))
1921 drv_start_ap(local, sdata);
1925 case NL80211_IFTYPE_MESH_POINT:
1926 if (sdata->vif.bss_conf.enable_beacon) {
1927 changed |= BSS_CHANGED_BEACON |
1928 BSS_CHANGED_BEACON_ENABLED;
1929 ieee80211_bss_info_change_notify(sdata, changed);
1932 case NL80211_IFTYPE_WDS:
1933 case NL80211_IFTYPE_AP_VLAN:
1934 case NL80211_IFTYPE_MONITOR:
1935 case NL80211_IFTYPE_P2P_DEVICE:
1938 case NL80211_IFTYPE_UNSPECIFIED:
1939 case NUM_NL80211_IFTYPES:
1940 case NL80211_IFTYPE_P2P_CLIENT:
1941 case NL80211_IFTYPE_P2P_GO:
1947 ieee80211_recalc_ps(local, -1);
1950 * The sta might be in psm against the ap (e.g. because
1951 * this was the state before a hw restart), so we
1952 * explicitly send a null packet in order to make sure
1953 * it'll sync against the ap (and get out of psm).
1955 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1956 list_for_each_entry(sdata, &local->interfaces, list) {
1957 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1959 if (!sdata->u.mgd.associated)
1962 ieee80211_send_nullfunc(local, sdata, 0);
1966 /* APs are now beaconing, add back stations */
1967 mutex_lock(&local->sta_mtx);
1968 list_for_each_entry(sta, &local->sta_list, list) {
1969 enum ieee80211_sta_state state;
1974 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1977 for (state = IEEE80211_STA_NOTEXIST;
1978 state < sta->sta_state; state++)
1979 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1982 mutex_unlock(&local->sta_mtx);
1985 list_for_each_entry(sdata, &local->interfaces, list)
1986 if (ieee80211_sdata_running(sdata))
1987 ieee80211_enable_keys(sdata);
1990 local->in_reconfig = false;
1993 if (local->monitors == local->open_count && local->monitors > 0)
1994 ieee80211_add_virtual_monitor(local);
1997 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1998 * sessions can be established after a resume.
2000 * Also tear down aggregation sessions since reconfiguring
2001 * them in a hardware restart scenario is not easily done
2002 * right now, and the hardware will have lost information
2003 * about the sessions, but we and the AP still think they
2004 * are active. This is really a workaround though.
2006 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2007 mutex_lock(&local->sta_mtx);
2009 list_for_each_entry(sta, &local->sta_list, list) {
2010 ieee80211_sta_tear_down_BA_sessions(
2011 sta, AGG_STOP_LOCAL_REQUEST);
2012 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2015 mutex_unlock(&local->sta_mtx);
2018 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2019 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2023 * Reconfigure sched scan if it was interrupted by FW restart or
2026 mutex_lock(&local->mtx);
2027 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2028 lockdep_is_held(&local->mtx));
2029 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2030 lockdep_is_held(&local->mtx));
2031 if (sched_scan_sdata && sched_scan_req)
2033 * Sched scan stopped, but we don't want to report it. Instead,
2034 * we're trying to reschedule.
2036 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2038 sched_scan_stopped = true;
2039 mutex_unlock(&local->mtx);
2041 if (sched_scan_stopped)
2042 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2045 * If this is for hw restart things are still running.
2046 * We may want to change that later, however.
2048 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2049 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2051 if (!local->suspended)
2055 /* first set suspended false, then resuming */
2056 local->suspended = false;
2058 local->resuming = false;
2060 if (local->open_count && !reconfig_due_to_wowlan)
2061 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2063 list_for_each_entry(sdata, &local->interfaces, list) {
2064 if (!ieee80211_sdata_running(sdata))
2066 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2067 ieee80211_sta_restart(sdata);
2070 mod_timer(&local->sta_cleanup, jiffies + 1);
2078 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2080 struct ieee80211_sub_if_data *sdata;
2081 struct ieee80211_local *local;
2082 struct ieee80211_key *key;
2087 sdata = vif_to_sdata(vif);
2088 local = sdata->local;
2090 if (WARN_ON(!local->resuming))
2093 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2096 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2098 mutex_lock(&local->key_mtx);
2099 list_for_each_entry(key, &sdata->key_list, list)
2100 key->flags |= KEY_FLAG_TAINTED;
2101 mutex_unlock(&local->key_mtx);
2103 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2105 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2107 struct ieee80211_local *local = sdata->local;
2108 struct ieee80211_chanctx_conf *chanctx_conf;
2109 struct ieee80211_chanctx *chanctx;
2111 mutex_lock(&local->chanctx_mtx);
2113 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2114 lockdep_is_held(&local->chanctx_mtx));
2116 if (WARN_ON_ONCE(!chanctx_conf))
2119 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2120 ieee80211_recalc_smps_chanctx(local, chanctx);
2122 mutex_unlock(&local->chanctx_mtx);
2125 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2127 struct ieee80211_local *local = sdata->local;
2128 struct ieee80211_chanctx_conf *chanctx_conf;
2129 struct ieee80211_chanctx *chanctx;
2131 mutex_lock(&local->chanctx_mtx);
2133 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2134 lockdep_is_held(&local->chanctx_mtx));
2136 if (WARN_ON_ONCE(!chanctx_conf))
2139 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2140 ieee80211_recalc_chanctx_min_def(local, chanctx);
2142 mutex_unlock(&local->chanctx_mtx);
2145 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2149 for (i = 0; i < n_ids; i++)
2155 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2156 const u8 *ids, int n_ids,
2157 const u8 *after_ric, int n_after_ric,
2160 size_t pos = offset;
2162 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2163 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2164 pos += 2 + ies[pos + 1];
2166 while (pos < ielen &&
2167 !ieee80211_id_in_list(after_ric, n_after_ric,
2169 pos += 2 + ies[pos + 1];
2171 pos += 2 + ies[pos + 1];
2178 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2179 const u8 *ids, int n_ids, size_t offset)
2181 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2183 EXPORT_SYMBOL(ieee80211_ie_split);
2185 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2187 size_t pos = offset;
2189 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2190 pos += 2 + ies[pos + 1];
2195 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2199 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2201 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2205 * Scale up threshold values before storing it, as the RSSI averaging
2206 * algorithm uses a scaled up value as well. Change this scaling
2207 * factor if the RSSI averaging algorithm changes.
2209 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2210 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2213 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2217 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2219 WARN_ON(rssi_min_thold == rssi_max_thold ||
2220 rssi_min_thold > rssi_max_thold);
2222 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2225 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2227 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2229 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2231 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2233 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2235 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2240 *pos++ = WLAN_EID_HT_CAPABILITY;
2241 *pos++ = sizeof(struct ieee80211_ht_cap);
2242 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2244 /* capability flags */
2245 tmp = cpu_to_le16(cap);
2246 memcpy(pos, &tmp, sizeof(u16));
2249 /* AMPDU parameters */
2250 *pos++ = ht_cap->ampdu_factor |
2251 (ht_cap->ampdu_density <<
2252 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2255 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2256 pos += sizeof(ht_cap->mcs);
2258 /* extended capabilities */
2259 pos += sizeof(__le16);
2261 /* BF capabilities */
2262 pos += sizeof(__le32);
2264 /* antenna selection */
2270 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2275 *pos++ = WLAN_EID_VHT_CAPABILITY;
2276 *pos++ = sizeof(struct ieee80211_vht_cap);
2277 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2279 /* capability flags */
2280 tmp = cpu_to_le32(cap);
2281 memcpy(pos, &tmp, sizeof(u32));
2285 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2286 pos += sizeof(vht_cap->vht_mcs);
2291 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2292 const struct cfg80211_chan_def *chandef,
2295 struct ieee80211_ht_operation *ht_oper;
2296 /* Build HT Information */
2297 *pos++ = WLAN_EID_HT_OPERATION;
2298 *pos++ = sizeof(struct ieee80211_ht_operation);
2299 ht_oper = (struct ieee80211_ht_operation *)pos;
2300 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2301 chandef->chan->center_freq);
2302 switch (chandef->width) {
2303 case NL80211_CHAN_WIDTH_160:
2304 case NL80211_CHAN_WIDTH_80P80:
2305 case NL80211_CHAN_WIDTH_80:
2306 case NL80211_CHAN_WIDTH_40:
2307 if (chandef->center_freq1 > chandef->chan->center_freq)
2308 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2310 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2313 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2316 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2317 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2318 chandef->width != NL80211_CHAN_WIDTH_20)
2319 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2321 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2322 ht_oper->stbc_param = 0x0000;
2324 /* It seems that Basic MCS set and Supported MCS set
2325 are identical for the first 10 bytes */
2326 memset(&ht_oper->basic_set, 0, 16);
2327 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2329 return pos + sizeof(struct ieee80211_ht_operation);
2332 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2333 const struct ieee80211_ht_operation *ht_oper,
2334 struct cfg80211_chan_def *chandef)
2336 enum nl80211_channel_type channel_type;
2339 cfg80211_chandef_create(chandef, control_chan,
2340 NL80211_CHAN_NO_HT);
2344 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2345 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2346 channel_type = NL80211_CHAN_HT20;
2348 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2349 channel_type = NL80211_CHAN_HT40PLUS;
2351 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2352 channel_type = NL80211_CHAN_HT40MINUS;
2355 channel_type = NL80211_CHAN_NO_HT;
2358 cfg80211_chandef_create(chandef, control_chan, channel_type);
2361 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2362 const struct ieee80211_supported_band *sband,
2363 const u8 *srates, int srates_len, u32 *rates)
2365 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2366 int shift = ieee80211_chandef_get_shift(chandef);
2367 struct ieee80211_rate *br;
2368 int brate, rate, i, j, count = 0;
2372 for (i = 0; i < srates_len; i++) {
2373 rate = srates[i] & 0x7f;
2375 for (j = 0; j < sband->n_bitrates; j++) {
2376 br = &sband->bitrates[j];
2377 if ((rate_flags & br->flags) != rate_flags)
2380 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2381 if (brate == rate) {
2391 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2392 struct sk_buff *skb, bool need_basic,
2393 enum ieee80211_band band)
2395 struct ieee80211_local *local = sdata->local;
2396 struct ieee80211_supported_band *sband;
2399 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2402 shift = ieee80211_vif_get_shift(&sdata->vif);
2403 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2404 sband = local->hw.wiphy->bands[band];
2406 for (i = 0; i < sband->n_bitrates; i++) {
2407 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2414 if (skb_tailroom(skb) < rates + 2)
2417 pos = skb_put(skb, rates + 2);
2418 *pos++ = WLAN_EID_SUPP_RATES;
2420 for (i = 0; i < rates; i++) {
2422 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2425 if (need_basic && basic_rates & BIT(i))
2427 rate = sband->bitrates[i].bitrate;
2428 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2430 *pos++ = basic | (u8) rate;
2436 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2437 struct sk_buff *skb, bool need_basic,
2438 enum ieee80211_band band)
2440 struct ieee80211_local *local = sdata->local;
2441 struct ieee80211_supported_band *sband;
2443 u8 i, exrates, *pos;
2444 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2447 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2448 shift = ieee80211_vif_get_shift(&sdata->vif);
2450 sband = local->hw.wiphy->bands[band];
2452 for (i = 0; i < sband->n_bitrates; i++) {
2453 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2463 if (skb_tailroom(skb) < exrates + 2)
2467 pos = skb_put(skb, exrates + 2);
2468 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2470 for (i = 8; i < sband->n_bitrates; i++) {
2472 if ((rate_flags & sband->bitrates[i].flags)
2475 if (need_basic && basic_rates & BIT(i))
2477 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2479 *pos++ = basic | (u8) rate;
2485 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2487 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2490 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2491 /* non-managed type inferfaces */
2494 return ifmgd->ave_beacon_signal / 16;
2496 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2498 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2503 /* TODO: consider rx_highest */
2505 if (mcs->rx_mask[3])
2507 if (mcs->rx_mask[2])
2509 if (mcs->rx_mask[1])
2515 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2516 * @local: mac80211 hw info struct
2517 * @status: RX status
2518 * @mpdu_len: total MPDU length (including FCS)
2519 * @mpdu_offset: offset into MPDU to calculate timestamp at
2521 * This function calculates the RX timestamp at the given MPDU offset, taking
2522 * into account what the RX timestamp was. An offset of 0 will just normalize
2523 * the timestamp to TSF at beginning of MPDU reception.
2525 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2526 struct ieee80211_rx_status *status,
2527 unsigned int mpdu_len,
2528 unsigned int mpdu_offset)
2530 u64 ts = status->mactime;
2531 struct rate_info ri;
2534 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2537 memset(&ri, 0, sizeof(ri));
2539 /* Fill cfg80211 rate info */
2540 if (status->flag & RX_FLAG_HT) {
2541 ri.mcs = status->rate_idx;
2542 ri.flags |= RATE_INFO_FLAGS_MCS;
2543 if (status->flag & RX_FLAG_40MHZ)
2544 ri.bw = RATE_INFO_BW_40;
2546 ri.bw = RATE_INFO_BW_20;
2547 if (status->flag & RX_FLAG_SHORT_GI)
2548 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2549 } else if (status->flag & RX_FLAG_VHT) {
2550 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2551 ri.mcs = status->rate_idx;
2552 ri.nss = status->vht_nss;
2553 if (status->flag & RX_FLAG_40MHZ)
2554 ri.bw = RATE_INFO_BW_40;
2555 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2556 ri.bw = RATE_INFO_BW_80;
2557 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2558 ri.bw = RATE_INFO_BW_160;
2560 ri.bw = RATE_INFO_BW_20;
2561 if (status->flag & RX_FLAG_SHORT_GI)
2562 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2564 struct ieee80211_supported_band *sband;
2568 if (status->flag & RX_FLAG_10MHZ) {
2570 ri.bw = RATE_INFO_BW_10;
2571 } else if (status->flag & RX_FLAG_5MHZ) {
2573 ri.bw = RATE_INFO_BW_5;
2575 ri.bw = RATE_INFO_BW_20;
2578 sband = local->hw.wiphy->bands[status->band];
2579 bitrate = sband->bitrates[status->rate_idx].bitrate;
2580 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2583 rate = cfg80211_calculate_bitrate(&ri);
2584 if (WARN_ONCE(!rate,
2585 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2586 status->flag, status->rate_idx, status->vht_nss))
2589 /* rewind from end of MPDU */
2590 if (status->flag & RX_FLAG_MACTIME_END)
2591 ts -= mpdu_len * 8 * 10 / rate;
2593 ts += mpdu_offset * 8 * 10 / rate;
2598 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2600 struct ieee80211_sub_if_data *sdata;
2601 struct cfg80211_chan_def chandef;
2603 mutex_lock(&local->mtx);
2604 mutex_lock(&local->iflist_mtx);
2605 list_for_each_entry(sdata, &local->interfaces, list) {
2606 /* it might be waiting for the local->mtx, but then
2607 * by the time it gets it, sdata->wdev.cac_started
2608 * will no longer be true
2610 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2612 if (sdata->wdev.cac_started) {
2613 chandef = sdata->vif.bss_conf.chandef;
2614 ieee80211_vif_release_channel(sdata);
2615 cfg80211_cac_event(sdata->dev,
2617 NL80211_RADAR_CAC_ABORTED,
2621 mutex_unlock(&local->iflist_mtx);
2622 mutex_unlock(&local->mtx);
2625 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2627 struct ieee80211_local *local =
2628 container_of(work, struct ieee80211_local, radar_detected_work);
2629 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2630 struct ieee80211_chanctx *ctx;
2631 int num_chanctx = 0;
2633 mutex_lock(&local->chanctx_mtx);
2634 list_for_each_entry(ctx, &local->chanctx_list, list) {
2635 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2639 chandef = ctx->conf.def;
2641 mutex_unlock(&local->chanctx_mtx);
2643 ieee80211_dfs_cac_cancel(local);
2645 if (num_chanctx > 1)
2646 /* XXX: multi-channel is not supported yet */
2649 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2652 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2654 struct ieee80211_local *local = hw_to_local(hw);
2656 trace_api_radar_detected(local);
2658 ieee80211_queue_work(hw, &local->radar_detected_work);
2660 EXPORT_SYMBOL(ieee80211_radar_detected);
2662 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2668 case NL80211_CHAN_WIDTH_20:
2669 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2670 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2672 case NL80211_CHAN_WIDTH_40:
2673 c->width = NL80211_CHAN_WIDTH_20;
2674 c->center_freq1 = c->chan->center_freq;
2675 ret = IEEE80211_STA_DISABLE_40MHZ |
2676 IEEE80211_STA_DISABLE_VHT;
2678 case NL80211_CHAN_WIDTH_80:
2679 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2683 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2684 c->width = NL80211_CHAN_WIDTH_40;
2685 ret = IEEE80211_STA_DISABLE_VHT;
2687 case NL80211_CHAN_WIDTH_80P80:
2688 c->center_freq2 = 0;
2689 c->width = NL80211_CHAN_WIDTH_80;
2690 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2691 IEEE80211_STA_DISABLE_160MHZ;
2693 case NL80211_CHAN_WIDTH_160:
2695 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2698 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2699 c->width = NL80211_CHAN_WIDTH_80;
2700 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2701 IEEE80211_STA_DISABLE_160MHZ;
2704 case NL80211_CHAN_WIDTH_20_NOHT:
2706 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2707 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2709 case NL80211_CHAN_WIDTH_5:
2710 case NL80211_CHAN_WIDTH_10:
2713 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2717 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2723 * Returns true if smps_mode_new is strictly more restrictive than
2726 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2727 enum ieee80211_smps_mode smps_mode_new)
2729 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2730 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2733 switch (smps_mode_old) {
2734 case IEEE80211_SMPS_STATIC:
2736 case IEEE80211_SMPS_DYNAMIC:
2737 return smps_mode_new == IEEE80211_SMPS_STATIC;
2738 case IEEE80211_SMPS_OFF:
2739 return smps_mode_new != IEEE80211_SMPS_OFF;
2747 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2748 struct cfg80211_csa_settings *csa_settings)
2750 struct sk_buff *skb;
2751 struct ieee80211_mgmt *mgmt;
2752 struct ieee80211_local *local = sdata->local;
2754 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2755 sizeof(mgmt->u.action.u.chan_switch);
2758 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2759 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2762 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2763 5 + /* channel switch announcement element */
2764 3 + /* secondary channel offset element */
2765 8); /* mesh channel switch parameters element */
2769 skb_reserve(skb, local->tx_headroom);
2770 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2771 memset(mgmt, 0, hdr_len);
2772 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2773 IEEE80211_STYPE_ACTION);
2775 eth_broadcast_addr(mgmt->da);
2776 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2777 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2778 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2780 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2781 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2783 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2784 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2785 pos = skb_put(skb, 5);
2786 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2787 *pos++ = 3; /* IE length */
2788 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2789 freq = csa_settings->chandef.chan->center_freq;
2790 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2791 *pos++ = csa_settings->count; /* count */
2793 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2794 enum nl80211_channel_type ch_type;
2797 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2798 *pos++ = 1; /* IE length */
2799 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2800 if (ch_type == NL80211_CHAN_HT40PLUS)
2801 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2803 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2806 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2807 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2810 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2811 *pos++ = 6; /* IE length */
2812 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2813 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2814 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2815 *pos++ |= csa_settings->block_tx ?
2816 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2817 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2819 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2823 ieee80211_tx_skb(sdata, skb);
2827 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2829 return !(cs == NULL || cs->cipher == 0 ||
2830 cs->hdr_len < cs->pn_len + cs->pn_off ||
2831 cs->hdr_len <= cs->key_idx_off ||
2832 cs->key_idx_shift > 7 ||
2833 cs->key_idx_mask == 0);
2836 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2840 /* Ensure we have enough iftype bitmap space for all iftype values */
2841 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2843 for (i = 0; i < n; i++)
2844 if (!ieee80211_cs_valid(&cs[i]))
2850 const struct ieee80211_cipher_scheme *
2851 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2852 enum nl80211_iftype iftype)
2854 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2855 int n = local->hw.n_cipher_schemes;
2857 const struct ieee80211_cipher_scheme *cs = NULL;
2859 for (i = 0; i < n; i++) {
2860 if (l[i].cipher == cipher) {
2866 if (!cs || !(cs->iftype & BIT(iftype)))
2872 int ieee80211_cs_headroom(struct ieee80211_local *local,
2873 struct cfg80211_crypto_settings *crypto,
2874 enum nl80211_iftype iftype)
2876 const struct ieee80211_cipher_scheme *cs;
2877 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2880 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2881 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2884 if (cs && headroom < cs->hdr_len)
2885 headroom = cs->hdr_len;
2888 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2889 if (cs && headroom < cs->hdr_len)
2890 headroom = cs->hdr_len;
2896 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2898 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2904 /* End time is in the past, check for repetitions */
2905 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2906 if (data->count[i] < 255) {
2907 if (data->count[i] <= skip) {
2912 data->count[i] -= skip;
2915 data->desc[i].start += skip * data->desc[i].interval;
2921 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2927 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2930 if (!data->count[i])
2933 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2936 cur = data->desc[i].start - tsf;
2940 cur = data->desc[i].start + data->desc[i].duration - tsf;
2949 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2954 * arbitrary limit, used to avoid infinite loops when combined NoA
2955 * descriptors cover the full time period.
2959 ieee80211_extend_absent_time(data, tsf, &offset);
2961 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2965 } while (tries < max_tries);
2970 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2972 u32 next_offset = BIT(31) - 1;
2976 data->has_next_tsf = false;
2977 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2980 if (!data->count[i])
2983 ieee80211_extend_noa_desc(data, tsf, i);
2984 start = data->desc[i].start - tsf;
2986 data->absent |= BIT(i);
2988 if (next_offset > start)
2989 next_offset = start;
2991 data->has_next_tsf = true;
2995 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2997 data->next_tsf = tsf + next_offset;
2999 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3001 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3002 struct ieee80211_noa_data *data, u32 tsf)
3007 memset(data, 0, sizeof(*data));
3009 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3010 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3012 if (!desc->count || !desc->duration)
3015 data->count[i] = desc->count;
3016 data->desc[i].start = le32_to_cpu(desc->start_time);
3017 data->desc[i].duration = le32_to_cpu(desc->duration);
3018 data->desc[i].interval = le32_to_cpu(desc->interval);
3020 if (data->count[i] > 1 &&
3021 data->desc[i].interval < data->desc[i].duration)
3024 ieee80211_extend_noa_desc(data, tsf, i);
3029 ieee80211_update_p2p_noa(data, tsf);
3033 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3035 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3036 struct ieee80211_sub_if_data *sdata)
3038 u64 tsf = drv_get_tsf(local, sdata);
3040 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3041 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3045 if (tsf == -1ULL || !beacon_int || !dtim_period)
3048 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3049 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3053 ps = &sdata->bss->ps;
3054 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3055 ps = &sdata->u.mesh.ps;
3061 * actually finds last dtim_count, mac80211 will update in
3062 * __beacon_add_tim().
3063 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3065 do_div(tsf, beacon_int);
3066 bcns_from_dtim = do_div(tsf, dtim_period);
3067 /* just had a DTIM */
3068 if (!bcns_from_dtim)
3071 dtim_count = dtim_period - bcns_from_dtim;
3073 ps->dtim_count = dtim_count;
3076 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3077 struct ieee80211_chanctx *ctx)
3079 struct ieee80211_sub_if_data *sdata;
3080 u8 radar_detect = 0;
3082 lockdep_assert_held(&local->chanctx_mtx);
3084 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3087 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3088 if (sdata->reserved_radar_required)
3089 radar_detect |= BIT(sdata->reserved_chandef.width);
3092 * An in-place reservation context should not have any assigned vifs
3093 * until it replaces the other context.
3095 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3096 !list_empty(&ctx->assigned_vifs));
3098 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3099 if (sdata->radar_required)
3100 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3102 return radar_detect;
3105 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3106 const struct cfg80211_chan_def *chandef,
3107 enum ieee80211_chanctx_mode chanmode,
3110 struct ieee80211_local *local = sdata->local;
3111 struct ieee80211_sub_if_data *sdata_iter;
3112 enum nl80211_iftype iftype = sdata->wdev.iftype;
3113 int num[NUM_NL80211_IFTYPES];
3114 struct ieee80211_chanctx *ctx;
3115 int num_different_channels = 0;
3118 lockdep_assert_held(&local->chanctx_mtx);
3120 if (WARN_ON(hweight32(radar_detect) > 1))
3123 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3128 num_different_channels = 1;
3130 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3133 /* Always allow software iftypes */
3134 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3140 memset(num, 0, sizeof(num));
3142 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3145 list_for_each_entry(ctx, &local->chanctx_list, list) {
3146 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3148 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3149 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3150 num_different_channels++;
3153 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3154 cfg80211_chandef_compatible(chandef,
3157 num_different_channels++;
3160 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3161 struct wireless_dev *wdev_iter;
3163 wdev_iter = &sdata_iter->wdev;
3165 if (sdata_iter == sdata ||
3166 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3167 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3170 num[wdev_iter->iftype]++;
3174 if (total == 1 && !radar_detect)
3177 return cfg80211_check_combinations(local->hw.wiphy,
3178 num_different_channels,
3183 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3186 u32 *max_num_different_channels = data;
3188 *max_num_different_channels = max(*max_num_different_channels,
3189 c->num_different_channels);
3192 int ieee80211_max_num_channels(struct ieee80211_local *local)
3194 struct ieee80211_sub_if_data *sdata;
3195 int num[NUM_NL80211_IFTYPES] = {};
3196 struct ieee80211_chanctx *ctx;
3197 int num_different_channels = 0;
3198 u8 radar_detect = 0;
3199 u32 max_num_different_channels = 1;
3202 lockdep_assert_held(&local->chanctx_mtx);
3204 list_for_each_entry(ctx, &local->chanctx_list, list) {
3205 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3208 num_different_channels++;
3210 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3213 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3214 num[sdata->wdev.iftype]++;
3216 err = cfg80211_iter_combinations(local->hw.wiphy,
3217 num_different_channels, radar_detect,
3218 num, ieee80211_iter_max_chans,
3219 &max_num_different_channels);
3223 return max_num_different_channels;
3226 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3228 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3229 *buf++ = 7; /* len */
3230 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3233 *buf++ = 2; /* WME */
3234 *buf++ = 0; /* WME info */
3235 *buf++ = 1; /* WME ver */
3236 *buf++ = qosinfo; /* U-APSD no in use */