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_interfaces(struct ieee80211_local *local,
630 void (*iterator)(void *data, u8 *mac,
631 struct ieee80211_vif *vif),
634 struct ieee80211_sub_if_data *sdata;
635 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
637 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
638 switch (sdata->vif.type) {
639 case NL80211_IFTYPE_MONITOR:
640 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
643 case NL80211_IFTYPE_AP_VLAN:
648 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
649 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
651 if (ieee80211_sdata_running(sdata) || !active_only)
652 iterator(data, sdata->vif.addr,
656 sdata = rcu_dereference_check(local->monitor_sdata,
657 lockdep_is_held(&local->iflist_mtx) ||
658 lockdep_rtnl_is_held());
660 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
661 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
662 iterator(data, sdata->vif.addr, &sdata->vif);
665 void ieee80211_iterate_interfaces(
666 struct ieee80211_hw *hw, u32 iter_flags,
667 void (*iterator)(void *data, u8 *mac,
668 struct ieee80211_vif *vif),
671 struct ieee80211_local *local = hw_to_local(hw);
673 mutex_lock(&local->iflist_mtx);
674 __iterate_interfaces(local, iter_flags, iterator, data);
675 mutex_unlock(&local->iflist_mtx);
677 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
679 void ieee80211_iterate_active_interfaces_atomic(
680 struct ieee80211_hw *hw, u32 iter_flags,
681 void (*iterator)(void *data, u8 *mac,
682 struct ieee80211_vif *vif),
685 struct ieee80211_local *local = hw_to_local(hw);
688 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
692 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
694 void ieee80211_iterate_active_interfaces_rtnl(
695 struct ieee80211_hw *hw, u32 iter_flags,
696 void (*iterator)(void *data, u8 *mac,
697 struct ieee80211_vif *vif),
700 struct ieee80211_local *local = hw_to_local(hw);
704 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
707 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
709 static void __iterate_stations(struct ieee80211_local *local,
710 void (*iterator)(void *data,
711 struct ieee80211_sta *sta),
714 struct sta_info *sta;
716 list_for_each_entry_rcu(sta, &local->sta_list, list) {
720 iterator(data, &sta->sta);
724 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
725 void (*iterator)(void *data,
726 struct ieee80211_sta *sta),
729 struct ieee80211_local *local = hw_to_local(hw);
732 __iterate_stations(local, iterator, data);
735 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
737 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
739 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
741 if (!ieee80211_sdata_running(sdata) ||
742 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
746 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
749 * Nothing should have been stuffed into the workqueue during
750 * the suspend->resume cycle. Since we can't check each caller
751 * of this function if we are already quiescing / suspended,
752 * check here and don't WARN since this can actually happen when
753 * the rx path (for example) is racing against __ieee80211_suspend
754 * and suspending / quiescing was set after the rx path checked
757 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
759 if (local->quiescing || (local->suspended && !local->resuming)) {
760 pr_warn("queueing ieee80211 work while going to suspend\n");
767 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
769 struct ieee80211_local *local = hw_to_local(hw);
771 if (!ieee80211_can_queue_work(local))
774 queue_work(local->workqueue, work);
776 EXPORT_SYMBOL(ieee80211_queue_work);
778 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
779 struct delayed_work *dwork,
782 struct ieee80211_local *local = hw_to_local(hw);
784 if (!ieee80211_can_queue_work(local))
787 queue_delayed_work(local->workqueue, dwork, delay);
789 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
791 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
792 struct ieee802_11_elems *elems,
796 const u8 *pos = start;
797 bool calc_crc = filter != 0;
798 DECLARE_BITMAP(seen_elems, 256);
801 bitmap_zero(seen_elems, 256);
802 memset(elems, 0, sizeof(*elems));
803 elems->ie_start = start;
804 elems->total_len = len;
808 bool elem_parse_failed;
815 elems->parse_error = true;
821 case WLAN_EID_SUPP_RATES:
822 case WLAN_EID_FH_PARAMS:
823 case WLAN_EID_DS_PARAMS:
824 case WLAN_EID_CF_PARAMS:
826 case WLAN_EID_IBSS_PARAMS:
827 case WLAN_EID_CHALLENGE:
829 case WLAN_EID_ERP_INFO:
830 case WLAN_EID_EXT_SUPP_RATES:
831 case WLAN_EID_HT_CAPABILITY:
832 case WLAN_EID_HT_OPERATION:
833 case WLAN_EID_VHT_CAPABILITY:
834 case WLAN_EID_VHT_OPERATION:
835 case WLAN_EID_MESH_ID:
836 case WLAN_EID_MESH_CONFIG:
837 case WLAN_EID_PEER_MGMT:
842 case WLAN_EID_CHANNEL_SWITCH:
843 case WLAN_EID_EXT_CHANSWITCH_ANN:
844 case WLAN_EID_COUNTRY:
845 case WLAN_EID_PWR_CONSTRAINT:
846 case WLAN_EID_TIMEOUT_INTERVAL:
847 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
848 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
849 case WLAN_EID_CHAN_SWITCH_PARAM:
850 case WLAN_EID_EXT_CAPABILITY:
851 case WLAN_EID_CHAN_SWITCH_TIMING:
852 case WLAN_EID_LINK_ID:
854 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
855 * that if the content gets bigger it might be needed more than once
857 if (test_bit(id, seen_elems)) {
858 elems->parse_error = true;
866 if (calc_crc && id < 64 && (filter & (1ULL << id)))
867 crc = crc32_be(crc, pos - 2, elen + 2);
869 elem_parse_failed = false;
872 case WLAN_EID_LINK_ID:
873 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
874 elem_parse_failed = true;
877 elems->lnk_id = (void *)(pos - 2);
879 case WLAN_EID_CHAN_SWITCH_TIMING:
880 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
881 elem_parse_failed = true;
884 elems->ch_sw_timing = (void *)pos;
886 case WLAN_EID_EXT_CAPABILITY:
887 elems->ext_capab = pos;
888 elems->ext_capab_len = elen;
892 elems->ssid_len = elen;
894 case WLAN_EID_SUPP_RATES:
895 elems->supp_rates = pos;
896 elems->supp_rates_len = elen;
898 case WLAN_EID_DS_PARAMS:
900 elems->ds_params = pos;
902 elem_parse_failed = true;
905 if (elen >= sizeof(struct ieee80211_tim_ie)) {
906 elems->tim = (void *)pos;
907 elems->tim_len = elen;
909 elem_parse_failed = true;
911 case WLAN_EID_CHALLENGE:
912 elems->challenge = pos;
913 elems->challenge_len = elen;
915 case WLAN_EID_VENDOR_SPECIFIC:
916 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
918 /* Microsoft OUI (00:50:F2) */
921 crc = crc32_be(crc, pos - 2, elen + 2);
923 if (elen >= 5 && pos[3] == 2) {
924 /* OUI Type 2 - WMM IE */
926 elems->wmm_info = pos;
927 elems->wmm_info_len = elen;
928 } else if (pos[4] == 1) {
929 elems->wmm_param = pos;
930 elems->wmm_param_len = elen;
937 elems->rsn_len = elen;
939 case WLAN_EID_ERP_INFO:
941 elems->erp_info = pos;
943 elem_parse_failed = true;
945 case WLAN_EID_EXT_SUPP_RATES:
946 elems->ext_supp_rates = pos;
947 elems->ext_supp_rates_len = elen;
949 case WLAN_EID_HT_CAPABILITY:
950 if (elen >= sizeof(struct ieee80211_ht_cap))
951 elems->ht_cap_elem = (void *)pos;
953 elem_parse_failed = true;
955 case WLAN_EID_HT_OPERATION:
956 if (elen >= sizeof(struct ieee80211_ht_operation))
957 elems->ht_operation = (void *)pos;
959 elem_parse_failed = true;
961 case WLAN_EID_VHT_CAPABILITY:
962 if (elen >= sizeof(struct ieee80211_vht_cap))
963 elems->vht_cap_elem = (void *)pos;
965 elem_parse_failed = true;
967 case WLAN_EID_VHT_OPERATION:
968 if (elen >= sizeof(struct ieee80211_vht_operation))
969 elems->vht_operation = (void *)pos;
971 elem_parse_failed = true;
973 case WLAN_EID_OPMODE_NOTIF:
975 elems->opmode_notif = pos;
977 elem_parse_failed = true;
979 case WLAN_EID_MESH_ID:
980 elems->mesh_id = pos;
981 elems->mesh_id_len = elen;
983 case WLAN_EID_MESH_CONFIG:
984 if (elen >= sizeof(struct ieee80211_meshconf_ie))
985 elems->mesh_config = (void *)pos;
987 elem_parse_failed = true;
989 case WLAN_EID_PEER_MGMT:
990 elems->peering = pos;
991 elems->peering_len = elen;
993 case WLAN_EID_MESH_AWAKE_WINDOW:
995 elems->awake_window = (void *)pos;
999 elems->preq_len = elen;
1003 elems->prep_len = elen;
1007 elems->perr_len = elen;
1010 if (elen >= sizeof(struct ieee80211_rann_ie))
1011 elems->rann = (void *)pos;
1013 elem_parse_failed = true;
1015 case WLAN_EID_CHANNEL_SWITCH:
1016 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1017 elem_parse_failed = true;
1020 elems->ch_switch_ie = (void *)pos;
1022 case WLAN_EID_EXT_CHANSWITCH_ANN:
1023 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1024 elem_parse_failed = true;
1027 elems->ext_chansw_ie = (void *)pos;
1029 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1030 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1031 elem_parse_failed = true;
1034 elems->sec_chan_offs = (void *)pos;
1036 case WLAN_EID_CHAN_SWITCH_PARAM:
1038 sizeof(*elems->mesh_chansw_params_ie)) {
1039 elem_parse_failed = true;
1042 elems->mesh_chansw_params_ie = (void *)pos;
1044 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1046 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1047 elem_parse_failed = true;
1050 elems->wide_bw_chansw_ie = (void *)pos;
1052 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1054 elem_parse_failed = true;
1058 * This is a bit tricky, but as we only care about
1059 * the wide bandwidth channel switch element, so
1060 * just parse it out manually.
1062 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1065 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1066 elems->wide_bw_chansw_ie =
1069 elem_parse_failed = true;
1072 case WLAN_EID_COUNTRY:
1073 elems->country_elem = pos;
1074 elems->country_elem_len = elen;
1076 case WLAN_EID_PWR_CONSTRAINT:
1078 elem_parse_failed = true;
1081 elems->pwr_constr_elem = pos;
1083 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1084 /* Lots of different options exist, but we only care
1085 * about the Dynamic Transmit Power Control element.
1086 * First check for the Cisco OUI, then for the DTPC
1090 elem_parse_failed = true;
1094 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1095 pos[2] != 0x96 || pos[3] != 0x00)
1099 elem_parse_failed = true;
1104 crc = crc32_be(crc, pos - 2, elen + 2);
1106 elems->cisco_dtpc_elem = pos;
1108 case WLAN_EID_TIMEOUT_INTERVAL:
1109 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1110 elems->timeout_int = (void *)pos;
1112 elem_parse_failed = true;
1118 if (elem_parse_failed)
1119 elems->parse_error = true;
1121 __set_bit(id, seen_elems);
1128 elems->parse_error = true;
1133 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1136 struct ieee80211_local *local = sdata->local;
1137 struct ieee80211_tx_queue_params qparam;
1138 struct ieee80211_chanctx_conf *chanctx_conf;
1140 bool use_11b, enable_qos;
1141 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1144 if (!local->ops->conf_tx)
1147 if (local->hw.queues < IEEE80211_NUM_ACS)
1150 memset(&qparam, 0, sizeof(qparam));
1153 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1154 use_11b = (chanctx_conf &&
1155 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1156 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1160 * By default disable QoS in STA mode for old access points, which do
1161 * not support 802.11e. New APs will provide proper queue parameters,
1162 * that we will configure later.
1164 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1166 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1168 /* Set defaults according to 802.11-2007 Table 7-37 */
1175 /* Confiure old 802.11b/g medium access rules. */
1176 qparam.cw_max = aCWmax;
1177 qparam.cw_min = aCWmin;
1181 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1182 /* Update if QoS is enabled. */
1185 case IEEE80211_AC_BK:
1186 qparam.cw_max = aCWmax;
1187 qparam.cw_min = aCWmin;
1194 /* never happens but let's not leave undefined */
1196 case IEEE80211_AC_BE:
1197 qparam.cw_max = aCWmax;
1198 qparam.cw_min = aCWmin;
1205 case IEEE80211_AC_VI:
1206 qparam.cw_max = aCWmin;
1207 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1211 qparam.txop = 6016/32;
1213 qparam.txop = 3008/32;
1220 case IEEE80211_AC_VO:
1221 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1222 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1226 qparam.txop = 3264/32;
1228 qparam.txop = 1504/32;
1234 qparam.uapsd = false;
1236 sdata->tx_conf[ac] = qparam;
1237 drv_conf_tx(local, sdata, ac, &qparam);
1240 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1241 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1242 sdata->vif.bss_conf.qos = enable_qos;
1244 ieee80211_bss_info_change_notify(sdata,
1249 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1250 u16 transaction, u16 auth_alg, u16 status,
1251 const u8 *extra, size_t extra_len, const u8 *da,
1252 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1255 struct ieee80211_local *local = sdata->local;
1256 struct sk_buff *skb;
1257 struct ieee80211_mgmt *mgmt;
1260 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1261 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1262 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1266 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1268 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1269 memset(mgmt, 0, 24 + 6);
1270 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1271 IEEE80211_STYPE_AUTH);
1272 memcpy(mgmt->da, da, ETH_ALEN);
1273 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1274 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1275 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1276 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1277 mgmt->u.auth.status_code = cpu_to_le16(status);
1279 memcpy(skb_put(skb, extra_len), extra, extra_len);
1281 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1282 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1283 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1287 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1289 ieee80211_tx_skb(sdata, skb);
1292 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1293 const u8 *bssid, u16 stype, u16 reason,
1294 bool send_frame, u8 *frame_buf)
1296 struct ieee80211_local *local = sdata->local;
1297 struct sk_buff *skb;
1298 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1301 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1302 mgmt->duration = 0; /* initialize only */
1303 mgmt->seq_ctrl = 0; /* initialize only */
1304 memcpy(mgmt->da, bssid, ETH_ALEN);
1305 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1306 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1307 /* u.deauth.reason_code == u.disassoc.reason_code */
1308 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1311 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1312 IEEE80211_DEAUTH_FRAME_LEN);
1316 skb_reserve(skb, local->hw.extra_tx_headroom);
1319 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1320 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1322 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1323 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1324 IEEE80211_SKB_CB(skb)->flags |=
1325 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1327 ieee80211_tx_skb(sdata, skb);
1331 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1332 u8 *buffer, size_t buffer_len,
1333 const u8 *ie, size_t ie_len,
1334 enum ieee80211_band band,
1336 struct cfg80211_chan_def *chandef,
1339 struct ieee80211_supported_band *sband;
1340 u8 *pos = buffer, *end = buffer + buffer_len;
1342 int supp_rates_len, i;
1348 bool have_80mhz = false;
1352 sband = local->hw.wiphy->bands[band];
1353 if (WARN_ON_ONCE(!sband))
1356 rate_flags = ieee80211_chandef_rate_flags(chandef);
1357 shift = ieee80211_chandef_get_shift(chandef);
1360 for (i = 0; i < sband->n_bitrates; i++) {
1361 if ((BIT(i) & rate_mask) == 0)
1362 continue; /* skip rate */
1363 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1366 rates[num_rates++] =
1367 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1371 supp_rates_len = min_t(int, num_rates, 8);
1373 if (end - pos < 2 + supp_rates_len)
1375 *pos++ = WLAN_EID_SUPP_RATES;
1376 *pos++ = supp_rates_len;
1377 memcpy(pos, rates, supp_rates_len);
1378 pos += supp_rates_len;
1380 /* insert "request information" if in custom IEs */
1382 static const u8 before_extrates[] = {
1384 WLAN_EID_SUPP_RATES,
1387 noffset = ieee80211_ie_split(ie, ie_len,
1389 ARRAY_SIZE(before_extrates),
1391 if (end - pos < noffset - *offset)
1393 memcpy(pos, ie + *offset, noffset - *offset);
1394 pos += noffset - *offset;
1398 ext_rates_len = num_rates - supp_rates_len;
1399 if (ext_rates_len > 0) {
1400 if (end - pos < 2 + ext_rates_len)
1402 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1403 *pos++ = ext_rates_len;
1404 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1405 pos += ext_rates_len;
1408 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1411 *pos++ = WLAN_EID_DS_PARAMS;
1413 *pos++ = ieee80211_frequency_to_channel(
1414 chandef->chan->center_freq);
1417 /* insert custom IEs that go before HT */
1419 static const u8 before_ht[] = {
1421 WLAN_EID_SUPP_RATES,
1423 WLAN_EID_EXT_SUPP_RATES,
1425 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1427 noffset = ieee80211_ie_split(ie, ie_len,
1428 before_ht, ARRAY_SIZE(before_ht),
1430 if (end - pos < noffset - *offset)
1432 memcpy(pos, ie + *offset, noffset - *offset);
1433 pos += noffset - *offset;
1437 if (sband->ht_cap.ht_supported) {
1438 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1440 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1445 * If adding more here, adjust code in main.c
1446 * that calculates local->scan_ies_len.
1449 /* insert custom IEs that go before VHT */
1451 static const u8 before_vht[] = {
1453 WLAN_EID_SUPP_RATES,
1455 WLAN_EID_EXT_SUPP_RATES,
1457 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1458 WLAN_EID_HT_CAPABILITY,
1459 WLAN_EID_BSS_COEX_2040,
1460 WLAN_EID_EXT_CAPABILITY,
1462 WLAN_EID_CHANNEL_USAGE,
1463 WLAN_EID_INTERWORKING,
1464 /* mesh ID can't happen here */
1465 /* 60 GHz can't happen here right now */
1467 noffset = ieee80211_ie_split(ie, ie_len,
1468 before_vht, ARRAY_SIZE(before_vht),
1470 if (end - pos < noffset - *offset)
1472 memcpy(pos, ie + *offset, noffset - *offset);
1473 pos += noffset - *offset;
1477 /* Check if any channel in this sband supports at least 80 MHz */
1478 for (i = 0; i < sband->n_channels; i++) {
1479 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1480 IEEE80211_CHAN_NO_80MHZ))
1487 if (sband->vht_cap.vht_supported && have_80mhz) {
1488 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1490 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1491 sband->vht_cap.cap);
1494 return pos - buffer;
1496 WARN_ONCE(1, "not enough space for preq IEs\n");
1497 return pos - buffer;
1500 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1502 struct ieee80211_scan_ies *ie_desc,
1503 const u8 *ie, size_t ie_len,
1504 u8 bands_used, u32 *rate_masks,
1505 struct cfg80211_chan_def *chandef)
1507 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1510 memset(ie_desc, 0, sizeof(*ie_desc));
1512 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1513 if (bands_used & BIT(i)) {
1514 pos += ieee80211_build_preq_ies_band(local,
1521 ie_desc->ies[i] = buffer + old_pos;
1522 ie_desc->len[i] = pos - old_pos;
1527 /* add any remaining custom IEs */
1529 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1530 "not enough space for preq custom IEs\n"))
1532 memcpy(buffer + pos, ie + custom_ie_offset,
1533 ie_len - custom_ie_offset);
1534 ie_desc->common_ies = buffer + pos;
1535 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1536 pos += ie_len - custom_ie_offset;
1542 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1543 const u8 *src, const u8 *dst,
1545 struct ieee80211_channel *chan,
1546 const u8 *ssid, size_t ssid_len,
1547 const u8 *ie, size_t ie_len,
1550 struct ieee80211_local *local = sdata->local;
1551 struct cfg80211_chan_def chandef;
1552 struct sk_buff *skb;
1553 struct ieee80211_mgmt *mgmt;
1555 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1556 struct ieee80211_scan_ies dummy_ie_desc;
1559 * Do not send DS Channel parameter for directed probe requests
1560 * in order to maximize the chance that we get a response. Some
1561 * badly-behaved APs don't respond when this parameter is included.
1563 chandef.width = sdata->vif.bss_conf.chandef.width;
1565 chandef.chan = NULL;
1567 chandef.chan = chan;
1569 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1574 rate_masks[chan->band] = ratemask;
1575 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1576 skb_tailroom(skb), &dummy_ie_desc,
1577 ie, ie_len, BIT(chan->band),
1578 rate_masks, &chandef);
1579 skb_put(skb, ies_len);
1582 mgmt = (struct ieee80211_mgmt *) skb->data;
1583 memcpy(mgmt->da, dst, ETH_ALEN);
1584 memcpy(mgmt->bssid, dst, ETH_ALEN);
1587 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1592 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1593 const u8 *src, const u8 *dst,
1594 const u8 *ssid, size_t ssid_len,
1595 const u8 *ie, size_t ie_len,
1596 u32 ratemask, bool directed, u32 tx_flags,
1597 struct ieee80211_channel *channel, bool scan)
1599 struct sk_buff *skb;
1601 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1603 ie, ie_len, directed);
1605 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1607 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1609 ieee80211_tx_skb(sdata, skb);
1613 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1614 struct ieee802_11_elems *elems,
1615 enum ieee80211_band band, u32 *basic_rates)
1617 struct ieee80211_supported_band *sband;
1619 u32 supp_rates, rate_flags;
1621 sband = sdata->local->hw.wiphy->bands[band];
1623 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1624 shift = ieee80211_vif_get_shift(&sdata->vif);
1626 if (WARN_ON(!sband))
1629 num_rates = sband->n_bitrates;
1631 for (i = 0; i < elems->supp_rates_len +
1632 elems->ext_supp_rates_len; i++) {
1636 if (i < elems->supp_rates_len)
1637 rate = elems->supp_rates[i];
1638 else if (elems->ext_supp_rates)
1639 rate = elems->ext_supp_rates
1640 [i - elems->supp_rates_len];
1641 own_rate = 5 * (rate & 0x7f);
1642 is_basic = !!(rate & 0x80);
1644 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1647 for (j = 0; j < num_rates; j++) {
1649 if ((rate_flags & sband->bitrates[j].flags)
1653 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1656 if (brate == own_rate) {
1657 supp_rates |= BIT(j);
1658 if (basic_rates && is_basic)
1659 *basic_rates |= BIT(j);
1666 void ieee80211_stop_device(struct ieee80211_local *local)
1668 ieee80211_led_radio(local, false);
1669 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1671 cancel_work_sync(&local->reconfig_filter);
1673 flush_workqueue(local->workqueue);
1677 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1679 struct ieee80211_sub_if_data *sdata;
1680 struct ieee80211_chanctx *ctx;
1683 * We get here if during resume the device can't be restarted properly.
1684 * We might also get here if this happens during HW reset, which is a
1685 * slightly different situation and we need to drop all connections in
1688 * Ask cfg80211 to turn off all interfaces, this will result in more
1689 * warnings but at least we'll then get into a clean stopped state.
1692 local->resuming = false;
1693 local->suspended = false;
1694 local->started = false;
1696 /* scheduled scan clearly can't be running any more, but tell
1697 * cfg80211 and clear local state
1699 ieee80211_sched_scan_end(local);
1701 list_for_each_entry(sdata, &local->interfaces, list)
1702 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1704 /* Mark channel contexts as not being in the driver any more to avoid
1705 * removing them from the driver during the shutdown process...
1707 mutex_lock(&local->chanctx_mtx);
1708 list_for_each_entry(ctx, &local->chanctx_list, list)
1709 ctx->driver_present = false;
1710 mutex_unlock(&local->chanctx_mtx);
1712 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1715 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1716 struct ieee80211_sub_if_data *sdata)
1718 struct ieee80211_chanctx_conf *conf;
1719 struct ieee80211_chanctx *ctx;
1721 if (!local->use_chanctx)
1724 mutex_lock(&local->chanctx_mtx);
1725 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1726 lockdep_is_held(&local->chanctx_mtx));
1728 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1729 drv_assign_vif_chanctx(local, sdata, ctx);
1731 mutex_unlock(&local->chanctx_mtx);
1734 int ieee80211_reconfig(struct ieee80211_local *local)
1736 struct ieee80211_hw *hw = &local->hw;
1737 struct ieee80211_sub_if_data *sdata;
1738 struct ieee80211_chanctx *ctx;
1739 struct sta_info *sta;
1741 bool reconfig_due_to_wowlan = false;
1742 struct ieee80211_sub_if_data *sched_scan_sdata;
1743 struct cfg80211_sched_scan_request *sched_scan_req;
1744 bool sched_scan_stopped = false;
1746 /* nothing to do if HW shouldn't run */
1747 if (!local->open_count)
1751 if (local->suspended)
1752 local->resuming = true;
1754 if (local->wowlan) {
1755 res = drv_resume(local);
1756 local->wowlan = false;
1758 local->resuming = false;
1765 * res is 1, which means the driver requested
1766 * to go through a regular reset on wakeup.
1768 reconfig_due_to_wowlan = true;
1773 * Upon resume hardware can sometimes be goofy due to
1774 * various platform / driver / bus issues, so restarting
1775 * the device may at times not work immediately. Propagate
1778 res = drv_start(local);
1780 if (local->suspended)
1781 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1783 WARN(1, "Hardware became unavailable during restart.\n");
1784 ieee80211_handle_reconfig_failure(local);
1788 /* setup fragmentation threshold */
1789 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1791 /* setup RTS threshold */
1792 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1794 /* reset coverage class */
1795 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1797 ieee80211_led_radio(local, true);
1798 ieee80211_mod_tpt_led_trig(local,
1799 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1801 /* add interfaces */
1802 sdata = rtnl_dereference(local->monitor_sdata);
1804 /* in HW restart it exists already */
1805 WARN_ON(local->resuming);
1806 res = drv_add_interface(local, sdata);
1808 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1814 list_for_each_entry(sdata, &local->interfaces, list) {
1815 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1816 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1817 ieee80211_sdata_running(sdata)) {
1818 res = drv_add_interface(local, sdata);
1824 /* If adding any of the interfaces failed above, roll back and
1828 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1830 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1831 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1832 ieee80211_sdata_running(sdata))
1833 drv_remove_interface(local, sdata);
1834 ieee80211_handle_reconfig_failure(local);
1838 /* add channel contexts */
1839 if (local->use_chanctx) {
1840 mutex_lock(&local->chanctx_mtx);
1841 list_for_each_entry(ctx, &local->chanctx_list, list)
1842 if (ctx->replace_state !=
1843 IEEE80211_CHANCTX_REPLACES_OTHER)
1844 WARN_ON(drv_add_chanctx(local, ctx));
1845 mutex_unlock(&local->chanctx_mtx);
1847 list_for_each_entry(sdata, &local->interfaces, list) {
1848 if (!ieee80211_sdata_running(sdata))
1850 ieee80211_assign_chanctx(local, sdata);
1853 sdata = rtnl_dereference(local->monitor_sdata);
1854 if (sdata && ieee80211_sdata_running(sdata))
1855 ieee80211_assign_chanctx(local, sdata);
1859 mutex_lock(&local->sta_mtx);
1860 list_for_each_entry(sta, &local->sta_list, list) {
1861 enum ieee80211_sta_state state;
1866 /* AP-mode stations will be added later */
1867 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1870 for (state = IEEE80211_STA_NOTEXIST;
1871 state < sta->sta_state; state++)
1872 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1875 mutex_unlock(&local->sta_mtx);
1877 /* reconfigure tx conf */
1878 if (hw->queues >= IEEE80211_NUM_ACS) {
1879 list_for_each_entry(sdata, &local->interfaces, list) {
1880 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1881 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1882 !ieee80211_sdata_running(sdata))
1885 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1886 drv_conf_tx(local, sdata, i,
1887 &sdata->tx_conf[i]);
1891 /* reconfigure hardware */
1892 ieee80211_hw_config(local, ~0);
1894 ieee80211_configure_filter(local);
1896 /* Finally also reconfigure all the BSS information */
1897 list_for_each_entry(sdata, &local->interfaces, list) {
1900 if (!ieee80211_sdata_running(sdata))
1903 /* common change flags for all interface types */
1904 changed = BSS_CHANGED_ERP_CTS_PROT |
1905 BSS_CHANGED_ERP_PREAMBLE |
1906 BSS_CHANGED_ERP_SLOT |
1908 BSS_CHANGED_BASIC_RATES |
1909 BSS_CHANGED_BEACON_INT |
1914 BSS_CHANGED_TXPOWER;
1916 switch (sdata->vif.type) {
1917 case NL80211_IFTYPE_STATION:
1918 changed |= BSS_CHANGED_ASSOC |
1919 BSS_CHANGED_ARP_FILTER |
1922 /* Re-send beacon info report to the driver */
1923 if (sdata->u.mgd.have_beacon)
1924 changed |= BSS_CHANGED_BEACON_INFO;
1927 ieee80211_bss_info_change_notify(sdata, changed);
1928 sdata_unlock(sdata);
1930 case NL80211_IFTYPE_OCB:
1931 changed |= BSS_CHANGED_OCB;
1932 ieee80211_bss_info_change_notify(sdata, changed);
1934 case NL80211_IFTYPE_ADHOC:
1935 changed |= BSS_CHANGED_IBSS;
1937 case NL80211_IFTYPE_AP:
1938 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1940 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1941 changed |= BSS_CHANGED_AP_PROBE_RESP;
1943 if (rcu_access_pointer(sdata->u.ap.beacon))
1944 drv_start_ap(local, sdata);
1948 case NL80211_IFTYPE_MESH_POINT:
1949 if (sdata->vif.bss_conf.enable_beacon) {
1950 changed |= BSS_CHANGED_BEACON |
1951 BSS_CHANGED_BEACON_ENABLED;
1952 ieee80211_bss_info_change_notify(sdata, changed);
1955 case NL80211_IFTYPE_WDS:
1956 case NL80211_IFTYPE_AP_VLAN:
1957 case NL80211_IFTYPE_MONITOR:
1958 case NL80211_IFTYPE_P2P_DEVICE:
1961 case NL80211_IFTYPE_UNSPECIFIED:
1962 case NUM_NL80211_IFTYPES:
1963 case NL80211_IFTYPE_P2P_CLIENT:
1964 case NL80211_IFTYPE_P2P_GO:
1970 ieee80211_recalc_ps(local, -1);
1973 * The sta might be in psm against the ap (e.g. because
1974 * this was the state before a hw restart), so we
1975 * explicitly send a null packet in order to make sure
1976 * it'll sync against the ap (and get out of psm).
1978 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1979 list_for_each_entry(sdata, &local->interfaces, list) {
1980 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1982 if (!sdata->u.mgd.associated)
1985 ieee80211_send_nullfunc(local, sdata, 0);
1989 /* APs are now beaconing, add back stations */
1990 mutex_lock(&local->sta_mtx);
1991 list_for_each_entry(sta, &local->sta_list, list) {
1992 enum ieee80211_sta_state state;
1997 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2000 for (state = IEEE80211_STA_NOTEXIST;
2001 state < sta->sta_state; state++)
2002 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2005 mutex_unlock(&local->sta_mtx);
2008 list_for_each_entry(sdata, &local->interfaces, list)
2009 if (ieee80211_sdata_running(sdata))
2010 ieee80211_enable_keys(sdata);
2013 local->in_reconfig = false;
2016 if (local->monitors == local->open_count && local->monitors > 0)
2017 ieee80211_add_virtual_monitor(local);
2020 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2021 * sessions can be established after a resume.
2023 * Also tear down aggregation sessions since reconfiguring
2024 * them in a hardware restart scenario is not easily done
2025 * right now, and the hardware will have lost information
2026 * about the sessions, but we and the AP still think they
2027 * are active. This is really a workaround though.
2029 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2030 mutex_lock(&local->sta_mtx);
2032 list_for_each_entry(sta, &local->sta_list, list) {
2033 ieee80211_sta_tear_down_BA_sessions(
2034 sta, AGG_STOP_LOCAL_REQUEST);
2035 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2038 mutex_unlock(&local->sta_mtx);
2041 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2042 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2046 * Reconfigure sched scan if it was interrupted by FW restart or
2049 mutex_lock(&local->mtx);
2050 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2051 lockdep_is_held(&local->mtx));
2052 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2053 lockdep_is_held(&local->mtx));
2054 if (sched_scan_sdata && sched_scan_req)
2056 * Sched scan stopped, but we don't want to report it. Instead,
2057 * we're trying to reschedule.
2059 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2061 sched_scan_stopped = true;
2062 mutex_unlock(&local->mtx);
2064 if (sched_scan_stopped)
2065 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2068 * If this is for hw restart things are still running.
2069 * We may want to change that later, however.
2071 if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2072 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2074 if (!local->suspended)
2078 /* first set suspended false, then resuming */
2079 local->suspended = false;
2081 local->resuming = false;
2083 /* It's possible that we don't handle the scan completion in
2084 * time during suspend, so if it's still marked as completed
2085 * here, queue the work and flush it to clean things up.
2086 * Instead of calling the worker function directly here, we
2087 * really queue it to avoid potential races with other flows
2088 * scheduling the same work.
2090 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2091 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2092 flush_delayed_work(&local->scan_work);
2095 if (local->open_count && !reconfig_due_to_wowlan)
2096 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2098 list_for_each_entry(sdata, &local->interfaces, list) {
2099 if (!ieee80211_sdata_running(sdata))
2101 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2102 ieee80211_sta_restart(sdata);
2105 mod_timer(&local->sta_cleanup, jiffies + 1);
2113 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2115 struct ieee80211_sub_if_data *sdata;
2116 struct ieee80211_local *local;
2117 struct ieee80211_key *key;
2122 sdata = vif_to_sdata(vif);
2123 local = sdata->local;
2125 if (WARN_ON(!local->resuming))
2128 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2131 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2133 mutex_lock(&local->key_mtx);
2134 list_for_each_entry(key, &sdata->key_list, list)
2135 key->flags |= KEY_FLAG_TAINTED;
2136 mutex_unlock(&local->key_mtx);
2138 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2140 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2142 struct ieee80211_local *local = sdata->local;
2143 struct ieee80211_chanctx_conf *chanctx_conf;
2144 struct ieee80211_chanctx *chanctx;
2146 mutex_lock(&local->chanctx_mtx);
2148 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2149 lockdep_is_held(&local->chanctx_mtx));
2151 if (WARN_ON_ONCE(!chanctx_conf))
2154 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2155 ieee80211_recalc_smps_chanctx(local, chanctx);
2157 mutex_unlock(&local->chanctx_mtx);
2160 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2162 struct ieee80211_local *local = sdata->local;
2163 struct ieee80211_chanctx_conf *chanctx_conf;
2164 struct ieee80211_chanctx *chanctx;
2166 mutex_lock(&local->chanctx_mtx);
2168 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2169 lockdep_is_held(&local->chanctx_mtx));
2171 if (WARN_ON_ONCE(!chanctx_conf))
2174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175 ieee80211_recalc_chanctx_min_def(local, chanctx);
2177 mutex_unlock(&local->chanctx_mtx);
2180 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2184 for (i = 0; i < n_ids; i++)
2190 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2191 const u8 *ids, int n_ids,
2192 const u8 *after_ric, int n_after_ric,
2195 size_t pos = offset;
2197 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2198 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2199 pos += 2 + ies[pos + 1];
2201 while (pos < ielen &&
2202 !ieee80211_id_in_list(after_ric, n_after_ric,
2204 pos += 2 + ies[pos + 1];
2206 pos += 2 + ies[pos + 1];
2213 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2214 const u8 *ids, int n_ids, size_t offset)
2216 return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2218 EXPORT_SYMBOL(ieee80211_ie_split);
2220 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2222 size_t pos = offset;
2224 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2225 pos += 2 + ies[pos + 1];
2230 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2234 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2236 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2240 * Scale up threshold values before storing it, as the RSSI averaging
2241 * algorithm uses a scaled up value as well. Change this scaling
2242 * factor if the RSSI averaging algorithm changes.
2244 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2245 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2248 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2252 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2254 WARN_ON(rssi_min_thold == rssi_max_thold ||
2255 rssi_min_thold > rssi_max_thold);
2257 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2260 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2262 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2264 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2266 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2268 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2270 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2275 *pos++ = WLAN_EID_HT_CAPABILITY;
2276 *pos++ = sizeof(struct ieee80211_ht_cap);
2277 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2279 /* capability flags */
2280 tmp = cpu_to_le16(cap);
2281 memcpy(pos, &tmp, sizeof(u16));
2284 /* AMPDU parameters */
2285 *pos++ = ht_cap->ampdu_factor |
2286 (ht_cap->ampdu_density <<
2287 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2290 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2291 pos += sizeof(ht_cap->mcs);
2293 /* extended capabilities */
2294 pos += sizeof(__le16);
2296 /* BF capabilities */
2297 pos += sizeof(__le32);
2299 /* antenna selection */
2305 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2310 *pos++ = WLAN_EID_VHT_CAPABILITY;
2311 *pos++ = sizeof(struct ieee80211_vht_cap);
2312 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2314 /* capability flags */
2315 tmp = cpu_to_le32(cap);
2316 memcpy(pos, &tmp, sizeof(u32));
2320 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2321 pos += sizeof(vht_cap->vht_mcs);
2326 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2327 const struct cfg80211_chan_def *chandef,
2330 struct ieee80211_ht_operation *ht_oper;
2331 /* Build HT Information */
2332 *pos++ = WLAN_EID_HT_OPERATION;
2333 *pos++ = sizeof(struct ieee80211_ht_operation);
2334 ht_oper = (struct ieee80211_ht_operation *)pos;
2335 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2336 chandef->chan->center_freq);
2337 switch (chandef->width) {
2338 case NL80211_CHAN_WIDTH_160:
2339 case NL80211_CHAN_WIDTH_80P80:
2340 case NL80211_CHAN_WIDTH_80:
2341 case NL80211_CHAN_WIDTH_40:
2342 if (chandef->center_freq1 > chandef->chan->center_freq)
2343 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2345 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2348 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2351 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2352 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2353 chandef->width != NL80211_CHAN_WIDTH_20)
2354 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2356 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2357 ht_oper->stbc_param = 0x0000;
2359 /* It seems that Basic MCS set and Supported MCS set
2360 are identical for the first 10 bytes */
2361 memset(&ht_oper->basic_set, 0, 16);
2362 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2364 return pos + sizeof(struct ieee80211_ht_operation);
2367 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2368 const struct cfg80211_chan_def *chandef)
2370 struct ieee80211_vht_operation *vht_oper;
2372 *pos++ = WLAN_EID_VHT_OPERATION;
2373 *pos++ = sizeof(struct ieee80211_vht_operation);
2374 vht_oper = (struct ieee80211_vht_operation *)pos;
2375 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2376 chandef->center_freq1);
2377 if (chandef->center_freq2)
2378 vht_oper->center_freq_seg2_idx =
2379 ieee80211_frequency_to_channel(chandef->center_freq2);
2381 switch (chandef->width) {
2382 case NL80211_CHAN_WIDTH_160:
2383 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2385 case NL80211_CHAN_WIDTH_80P80:
2386 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2388 case NL80211_CHAN_WIDTH_80:
2389 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2392 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2396 /* don't require special VHT peer rates */
2397 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2399 return pos + sizeof(struct ieee80211_vht_operation);
2402 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2403 const struct ieee80211_ht_operation *ht_oper,
2404 struct cfg80211_chan_def *chandef)
2406 enum nl80211_channel_type channel_type;
2409 cfg80211_chandef_create(chandef, control_chan,
2410 NL80211_CHAN_NO_HT);
2414 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2415 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2416 channel_type = NL80211_CHAN_HT20;
2418 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2419 channel_type = NL80211_CHAN_HT40PLUS;
2421 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2422 channel_type = NL80211_CHAN_HT40MINUS;
2425 channel_type = NL80211_CHAN_NO_HT;
2428 cfg80211_chandef_create(chandef, control_chan, channel_type);
2431 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2432 const struct ieee80211_supported_band *sband,
2433 const u8 *srates, int srates_len, u32 *rates)
2435 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2436 int shift = ieee80211_chandef_get_shift(chandef);
2437 struct ieee80211_rate *br;
2438 int brate, rate, i, j, count = 0;
2442 for (i = 0; i < srates_len; i++) {
2443 rate = srates[i] & 0x7f;
2445 for (j = 0; j < sband->n_bitrates; j++) {
2446 br = &sband->bitrates[j];
2447 if ((rate_flags & br->flags) != rate_flags)
2450 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2451 if (brate == rate) {
2461 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2462 struct sk_buff *skb, bool need_basic,
2463 enum ieee80211_band band)
2465 struct ieee80211_local *local = sdata->local;
2466 struct ieee80211_supported_band *sband;
2469 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2472 shift = ieee80211_vif_get_shift(&sdata->vif);
2473 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2474 sband = local->hw.wiphy->bands[band];
2476 for (i = 0; i < sband->n_bitrates; i++) {
2477 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2484 if (skb_tailroom(skb) < rates + 2)
2487 pos = skb_put(skb, rates + 2);
2488 *pos++ = WLAN_EID_SUPP_RATES;
2490 for (i = 0; i < rates; i++) {
2492 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2495 if (need_basic && basic_rates & BIT(i))
2497 rate = sband->bitrates[i].bitrate;
2498 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2500 *pos++ = basic | (u8) rate;
2506 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2507 struct sk_buff *skb, bool need_basic,
2508 enum ieee80211_band band)
2510 struct ieee80211_local *local = sdata->local;
2511 struct ieee80211_supported_band *sband;
2513 u8 i, exrates, *pos;
2514 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2517 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2518 shift = ieee80211_vif_get_shift(&sdata->vif);
2520 sband = local->hw.wiphy->bands[band];
2522 for (i = 0; i < sband->n_bitrates; i++) {
2523 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2533 if (skb_tailroom(skb) < exrates + 2)
2537 pos = skb_put(skb, exrates + 2);
2538 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2540 for (i = 8; i < sband->n_bitrates; i++) {
2542 if ((rate_flags & sband->bitrates[i].flags)
2545 if (need_basic && basic_rates & BIT(i))
2547 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2549 *pos++ = basic | (u8) rate;
2555 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2557 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2558 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2560 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2561 /* non-managed type inferfaces */
2564 return ifmgd->ave_beacon_signal / 16;
2566 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2568 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2573 /* TODO: consider rx_highest */
2575 if (mcs->rx_mask[3])
2577 if (mcs->rx_mask[2])
2579 if (mcs->rx_mask[1])
2585 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2586 * @local: mac80211 hw info struct
2587 * @status: RX status
2588 * @mpdu_len: total MPDU length (including FCS)
2589 * @mpdu_offset: offset into MPDU to calculate timestamp at
2591 * This function calculates the RX timestamp at the given MPDU offset, taking
2592 * into account what the RX timestamp was. An offset of 0 will just normalize
2593 * the timestamp to TSF at beginning of MPDU reception.
2595 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2596 struct ieee80211_rx_status *status,
2597 unsigned int mpdu_len,
2598 unsigned int mpdu_offset)
2600 u64 ts = status->mactime;
2601 struct rate_info ri;
2604 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2607 memset(&ri, 0, sizeof(ri));
2609 /* Fill cfg80211 rate info */
2610 if (status->flag & RX_FLAG_HT) {
2611 ri.mcs = status->rate_idx;
2612 ri.flags |= RATE_INFO_FLAGS_MCS;
2613 if (status->flag & RX_FLAG_40MHZ)
2614 ri.bw = RATE_INFO_BW_40;
2616 ri.bw = RATE_INFO_BW_20;
2617 if (status->flag & RX_FLAG_SHORT_GI)
2618 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2619 } else if (status->flag & RX_FLAG_VHT) {
2620 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2621 ri.mcs = status->rate_idx;
2622 ri.nss = status->vht_nss;
2623 if (status->flag & RX_FLAG_40MHZ)
2624 ri.bw = RATE_INFO_BW_40;
2625 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2626 ri.bw = RATE_INFO_BW_80;
2627 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2628 ri.bw = RATE_INFO_BW_160;
2630 ri.bw = RATE_INFO_BW_20;
2631 if (status->flag & RX_FLAG_SHORT_GI)
2632 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2634 struct ieee80211_supported_band *sband;
2638 if (status->flag & RX_FLAG_10MHZ) {
2640 ri.bw = RATE_INFO_BW_10;
2641 } else if (status->flag & RX_FLAG_5MHZ) {
2643 ri.bw = RATE_INFO_BW_5;
2645 ri.bw = RATE_INFO_BW_20;
2648 sband = local->hw.wiphy->bands[status->band];
2649 bitrate = sband->bitrates[status->rate_idx].bitrate;
2650 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2653 rate = cfg80211_calculate_bitrate(&ri);
2654 if (WARN_ONCE(!rate,
2655 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2656 status->flag, status->rate_idx, status->vht_nss))
2659 /* rewind from end of MPDU */
2660 if (status->flag & RX_FLAG_MACTIME_END)
2661 ts -= mpdu_len * 8 * 10 / rate;
2663 ts += mpdu_offset * 8 * 10 / rate;
2668 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2670 struct ieee80211_sub_if_data *sdata;
2671 struct cfg80211_chan_def chandef;
2673 mutex_lock(&local->mtx);
2674 mutex_lock(&local->iflist_mtx);
2675 list_for_each_entry(sdata, &local->interfaces, list) {
2676 /* it might be waiting for the local->mtx, but then
2677 * by the time it gets it, sdata->wdev.cac_started
2678 * will no longer be true
2680 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2682 if (sdata->wdev.cac_started) {
2683 chandef = sdata->vif.bss_conf.chandef;
2684 ieee80211_vif_release_channel(sdata);
2685 cfg80211_cac_event(sdata->dev,
2687 NL80211_RADAR_CAC_ABORTED,
2691 mutex_unlock(&local->iflist_mtx);
2692 mutex_unlock(&local->mtx);
2695 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2697 struct ieee80211_local *local =
2698 container_of(work, struct ieee80211_local, radar_detected_work);
2699 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2700 struct ieee80211_chanctx *ctx;
2701 int num_chanctx = 0;
2703 mutex_lock(&local->chanctx_mtx);
2704 list_for_each_entry(ctx, &local->chanctx_list, list) {
2705 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2709 chandef = ctx->conf.def;
2711 mutex_unlock(&local->chanctx_mtx);
2713 ieee80211_dfs_cac_cancel(local);
2715 if (num_chanctx > 1)
2716 /* XXX: multi-channel is not supported yet */
2719 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2722 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2724 struct ieee80211_local *local = hw_to_local(hw);
2726 trace_api_radar_detected(local);
2728 ieee80211_queue_work(hw, &local->radar_detected_work);
2730 EXPORT_SYMBOL(ieee80211_radar_detected);
2732 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2738 case NL80211_CHAN_WIDTH_20:
2739 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2740 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2742 case NL80211_CHAN_WIDTH_40:
2743 c->width = NL80211_CHAN_WIDTH_20;
2744 c->center_freq1 = c->chan->center_freq;
2745 ret = IEEE80211_STA_DISABLE_40MHZ |
2746 IEEE80211_STA_DISABLE_VHT;
2748 case NL80211_CHAN_WIDTH_80:
2749 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2753 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2754 c->width = NL80211_CHAN_WIDTH_40;
2755 ret = IEEE80211_STA_DISABLE_VHT;
2757 case NL80211_CHAN_WIDTH_80P80:
2758 c->center_freq2 = 0;
2759 c->width = NL80211_CHAN_WIDTH_80;
2760 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2761 IEEE80211_STA_DISABLE_160MHZ;
2763 case NL80211_CHAN_WIDTH_160:
2765 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2768 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2769 c->width = NL80211_CHAN_WIDTH_80;
2770 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2771 IEEE80211_STA_DISABLE_160MHZ;
2774 case NL80211_CHAN_WIDTH_20_NOHT:
2776 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2777 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2779 case NL80211_CHAN_WIDTH_5:
2780 case NL80211_CHAN_WIDTH_10:
2783 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2787 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2793 * Returns true if smps_mode_new is strictly more restrictive than
2796 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2797 enum ieee80211_smps_mode smps_mode_new)
2799 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2800 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2803 switch (smps_mode_old) {
2804 case IEEE80211_SMPS_STATIC:
2806 case IEEE80211_SMPS_DYNAMIC:
2807 return smps_mode_new == IEEE80211_SMPS_STATIC;
2808 case IEEE80211_SMPS_OFF:
2809 return smps_mode_new != IEEE80211_SMPS_OFF;
2817 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2818 struct cfg80211_csa_settings *csa_settings)
2820 struct sk_buff *skb;
2821 struct ieee80211_mgmt *mgmt;
2822 struct ieee80211_local *local = sdata->local;
2824 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2825 sizeof(mgmt->u.action.u.chan_switch);
2828 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2829 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2832 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2833 5 + /* channel switch announcement element */
2834 3 + /* secondary channel offset element */
2835 8); /* mesh channel switch parameters element */
2839 skb_reserve(skb, local->tx_headroom);
2840 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2841 memset(mgmt, 0, hdr_len);
2842 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2843 IEEE80211_STYPE_ACTION);
2845 eth_broadcast_addr(mgmt->da);
2846 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2847 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2848 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2850 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2851 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2853 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2854 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2855 pos = skb_put(skb, 5);
2856 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2857 *pos++ = 3; /* IE length */
2858 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2859 freq = csa_settings->chandef.chan->center_freq;
2860 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2861 *pos++ = csa_settings->count; /* count */
2863 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2864 enum nl80211_channel_type ch_type;
2867 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2868 *pos++ = 1; /* IE length */
2869 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2870 if (ch_type == NL80211_CHAN_HT40PLUS)
2871 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2873 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2876 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2877 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2880 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2881 *pos++ = 6; /* IE length */
2882 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2883 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2884 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2885 *pos++ |= csa_settings->block_tx ?
2886 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2887 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2889 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2893 ieee80211_tx_skb(sdata, skb);
2897 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2899 return !(cs == NULL || cs->cipher == 0 ||
2900 cs->hdr_len < cs->pn_len + cs->pn_off ||
2901 cs->hdr_len <= cs->key_idx_off ||
2902 cs->key_idx_shift > 7 ||
2903 cs->key_idx_mask == 0);
2906 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2910 /* Ensure we have enough iftype bitmap space for all iftype values */
2911 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2913 for (i = 0; i < n; i++)
2914 if (!ieee80211_cs_valid(&cs[i]))
2920 const struct ieee80211_cipher_scheme *
2921 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2922 enum nl80211_iftype iftype)
2924 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2925 int n = local->hw.n_cipher_schemes;
2927 const struct ieee80211_cipher_scheme *cs = NULL;
2929 for (i = 0; i < n; i++) {
2930 if (l[i].cipher == cipher) {
2936 if (!cs || !(cs->iftype & BIT(iftype)))
2942 int ieee80211_cs_headroom(struct ieee80211_local *local,
2943 struct cfg80211_crypto_settings *crypto,
2944 enum nl80211_iftype iftype)
2946 const struct ieee80211_cipher_scheme *cs;
2947 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2950 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2951 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2954 if (cs && headroom < cs->hdr_len)
2955 headroom = cs->hdr_len;
2958 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2959 if (cs && headroom < cs->hdr_len)
2960 headroom = cs->hdr_len;
2966 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2968 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2974 /* End time is in the past, check for repetitions */
2975 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2976 if (data->count[i] < 255) {
2977 if (data->count[i] <= skip) {
2982 data->count[i] -= skip;
2985 data->desc[i].start += skip * data->desc[i].interval;
2991 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2997 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3000 if (!data->count[i])
3003 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3006 cur = data->desc[i].start - tsf;
3010 cur = data->desc[i].start + data->desc[i].duration - tsf;
3019 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3024 * arbitrary limit, used to avoid infinite loops when combined NoA
3025 * descriptors cover the full time period.
3029 ieee80211_extend_absent_time(data, tsf, &offset);
3031 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3035 } while (tries < max_tries);
3040 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3042 u32 next_offset = BIT(31) - 1;
3046 data->has_next_tsf = false;
3047 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3050 if (!data->count[i])
3053 ieee80211_extend_noa_desc(data, tsf, i);
3054 start = data->desc[i].start - tsf;
3056 data->absent |= BIT(i);
3058 if (next_offset > start)
3059 next_offset = start;
3061 data->has_next_tsf = true;
3065 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3067 data->next_tsf = tsf + next_offset;
3069 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3071 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3072 struct ieee80211_noa_data *data, u32 tsf)
3077 memset(data, 0, sizeof(*data));
3079 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3080 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3082 if (!desc->count || !desc->duration)
3085 data->count[i] = desc->count;
3086 data->desc[i].start = le32_to_cpu(desc->start_time);
3087 data->desc[i].duration = le32_to_cpu(desc->duration);
3088 data->desc[i].interval = le32_to_cpu(desc->interval);
3090 if (data->count[i] > 1 &&
3091 data->desc[i].interval < data->desc[i].duration)
3094 ieee80211_extend_noa_desc(data, tsf, i);
3099 ieee80211_update_p2p_noa(data, tsf);
3103 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3105 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3106 struct ieee80211_sub_if_data *sdata)
3108 u64 tsf = drv_get_tsf(local, sdata);
3110 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3111 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3115 if (tsf == -1ULL || !beacon_int || !dtim_period)
3118 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3119 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3123 ps = &sdata->bss->ps;
3124 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3125 ps = &sdata->u.mesh.ps;
3131 * actually finds last dtim_count, mac80211 will update in
3132 * __beacon_add_tim().
3133 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3135 do_div(tsf, beacon_int);
3136 bcns_from_dtim = do_div(tsf, dtim_period);
3137 /* just had a DTIM */
3138 if (!bcns_from_dtim)
3141 dtim_count = dtim_period - bcns_from_dtim;
3143 ps->dtim_count = dtim_count;
3146 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3147 struct ieee80211_chanctx *ctx)
3149 struct ieee80211_sub_if_data *sdata;
3150 u8 radar_detect = 0;
3152 lockdep_assert_held(&local->chanctx_mtx);
3154 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3157 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3158 if (sdata->reserved_radar_required)
3159 radar_detect |= BIT(sdata->reserved_chandef.width);
3162 * An in-place reservation context should not have any assigned vifs
3163 * until it replaces the other context.
3165 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3166 !list_empty(&ctx->assigned_vifs));
3168 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3169 if (sdata->radar_required)
3170 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3172 return radar_detect;
3175 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3176 const struct cfg80211_chan_def *chandef,
3177 enum ieee80211_chanctx_mode chanmode,
3180 struct ieee80211_local *local = sdata->local;
3181 struct ieee80211_sub_if_data *sdata_iter;
3182 enum nl80211_iftype iftype = sdata->wdev.iftype;
3183 int num[NUM_NL80211_IFTYPES];
3184 struct ieee80211_chanctx *ctx;
3185 int num_different_channels = 0;
3188 lockdep_assert_held(&local->chanctx_mtx);
3190 if (WARN_ON(hweight32(radar_detect) > 1))
3193 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3198 num_different_channels = 1;
3200 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3203 /* Always allow software iftypes */
3204 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3210 memset(num, 0, sizeof(num));
3212 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3215 list_for_each_entry(ctx, &local->chanctx_list, list) {
3216 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3218 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3219 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3220 num_different_channels++;
3223 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3224 cfg80211_chandef_compatible(chandef,
3227 num_different_channels++;
3230 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3231 struct wireless_dev *wdev_iter;
3233 wdev_iter = &sdata_iter->wdev;
3235 if (sdata_iter == sdata ||
3236 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3237 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3240 num[wdev_iter->iftype]++;
3244 if (total == 1 && !radar_detect)
3247 return cfg80211_check_combinations(local->hw.wiphy,
3248 num_different_channels,
3253 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3256 u32 *max_num_different_channels = data;
3258 *max_num_different_channels = max(*max_num_different_channels,
3259 c->num_different_channels);
3262 int ieee80211_max_num_channels(struct ieee80211_local *local)
3264 struct ieee80211_sub_if_data *sdata;
3265 int num[NUM_NL80211_IFTYPES] = {};
3266 struct ieee80211_chanctx *ctx;
3267 int num_different_channels = 0;
3268 u8 radar_detect = 0;
3269 u32 max_num_different_channels = 1;
3272 lockdep_assert_held(&local->chanctx_mtx);
3274 list_for_each_entry(ctx, &local->chanctx_list, list) {
3275 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3278 num_different_channels++;
3280 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3283 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3284 num[sdata->wdev.iftype]++;
3286 err = cfg80211_iter_combinations(local->hw.wiphy,
3287 num_different_channels, radar_detect,
3288 num, ieee80211_iter_max_chans,
3289 &max_num_different_channels);
3293 return max_num_different_channels;
3296 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3298 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3299 *buf++ = 7; /* len */
3300 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3303 *buf++ = 2; /* WME */
3304 *buf++ = 0; /* WME info */
3305 *buf++ = 1; /* WME ver */
3306 *buf++ = qosinfo; /* U-APSD no in use */