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
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 Intel Corporation
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * utilities for mac80211
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
44 struct ieee80211_local *local;
47 local = wiphy_priv(wiphy);
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
55 struct ieee80211_hdr *hdr;
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
81 if (band == NL80211_BAND_5GHZ || erp) {
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
135 struct ieee80211_rate *rate)
137 struct ieee80211_sub_if_data *sdata;
140 bool short_preamble = false;
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
154 return cpu_to_le16(dur);
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
166 int erp, shift = 0, bitrate;
168 struct ieee80211_supported_band *sband;
170 sband = local->hw.wiphy->bands[frame_txctl->band];
172 short_preamble = false;
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
197 return cpu_to_le16(dur);
199 EXPORT_SYMBOL(ieee80211_rts_duration);
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
204 const struct ieee80211_tx_info *frame_txctl)
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
210 int erp, shift = 0, bitrate;
212 struct ieee80211_supported_band *sband;
214 sband = local->hw.wiphy->bands[frame_txctl->band];
216 short_preamble = false;
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
239 return cpu_to_le16(dur);
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
245 struct ieee80211_sub_if_data *sdata;
246 int n_acs = IEEE80211_NUM_ACS;
248 if (local->ops->wake_tx_queue)
251 if (local->hw.queues < IEEE80211_NUM_ACS)
254 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
260 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
261 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
264 for (ac = 0; ac < n_acs; ac++) {
265 int ac_queue = sdata->vif.hw_queue[ac];
267 if (ac_queue == queue ||
268 (sdata->vif.cab_queue == queue &&
269 local->queue_stop_reasons[ac_queue] == 0 &&
270 skb_queue_empty(&local->pending[ac_queue])))
271 netif_wake_subqueue(sdata->dev, ac);
276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
277 enum queue_stop_reason reason,
280 struct ieee80211_local *local = hw_to_local(hw);
282 trace_wake_queue(local, queue, reason);
284 if (WARN_ON(queue >= hw->queues))
287 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
291 local->q_stop_reasons[queue][reason] = 0;
293 local->q_stop_reasons[queue][reason]--;
294 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
295 local->q_stop_reasons[queue][reason] = 0;
298 if (local->q_stop_reasons[queue][reason] == 0)
299 __clear_bit(reason, &local->queue_stop_reasons[queue]);
301 if (local->queue_stop_reasons[queue] != 0)
302 /* someone still has this queue stopped */
305 if (skb_queue_empty(&local->pending[queue])) {
307 ieee80211_propagate_queue_wake(local, queue);
310 tasklet_schedule(&local->tx_pending_tasklet);
313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
314 enum queue_stop_reason reason,
317 struct ieee80211_local *local = hw_to_local(hw);
320 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
321 __ieee80211_wake_queue(hw, queue, reason, refcounted);
322 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
327 ieee80211_wake_queue_by_reason(hw, queue,
328 IEEE80211_QUEUE_STOP_REASON_DRIVER,
331 EXPORT_SYMBOL(ieee80211_wake_queue);
333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason,
337 struct ieee80211_local *local = hw_to_local(hw);
338 struct ieee80211_sub_if_data *sdata;
339 int n_acs = IEEE80211_NUM_ACS;
341 trace_stop_queue(local, queue, reason);
343 if (WARN_ON(queue >= hw->queues))
347 local->q_stop_reasons[queue][reason] = 1;
349 local->q_stop_reasons[queue][reason]++;
351 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
354 if (local->ops->wake_tx_queue)
357 if (local->hw.queues < IEEE80211_NUM_ACS)
361 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
367 for (ac = 0; ac < n_acs; ac++) {
368 if (sdata->vif.hw_queue[ac] == queue ||
369 sdata->vif.cab_queue == queue)
370 netif_stop_subqueue(sdata->dev, ac);
376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
377 enum queue_stop_reason reason,
380 struct ieee80211_local *local = hw_to_local(hw);
383 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
384 __ieee80211_stop_queue(hw, queue, reason, refcounted);
385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
390 ieee80211_stop_queue_by_reason(hw, queue,
391 IEEE80211_QUEUE_STOP_REASON_DRIVER,
394 EXPORT_SYMBOL(ieee80211_stop_queue);
396 void ieee80211_add_pending_skb(struct ieee80211_local *local,
399 struct ieee80211_hw *hw = &local->hw;
401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
402 int queue = info->hw_queue;
404 if (WARN_ON(!info->control.vif)) {
405 ieee80211_free_txskb(&local->hw, skb);
409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
410 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
412 __skb_queue_tail(&local->pending[queue], skb);
413 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
419 struct sk_buff_head *skbs)
421 struct ieee80211_hw *hw = &local->hw;
426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
427 while ((skb = skb_dequeue(skbs))) {
428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
430 if (WARN_ON(!info->control.vif)) {
431 ieee80211_free_txskb(&local->hw, skb);
435 queue = info->hw_queue;
437 __ieee80211_stop_queue(hw, queue,
438 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
441 __skb_queue_tail(&local->pending[queue], skb);
444 for (i = 0; i < hw->queues; i++)
445 __ieee80211_wake_queue(hw, i,
446 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
452 unsigned long queues,
453 enum queue_stop_reason reason,
456 struct ieee80211_local *local = hw_to_local(hw);
460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
462 for_each_set_bit(i, &queues, hw->queues)
463 __ieee80211_stop_queue(hw, i, reason, refcounted);
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
468 void ieee80211_stop_queues(struct ieee80211_hw *hw)
470 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
471 IEEE80211_QUEUE_STOP_REASON_DRIVER,
474 EXPORT_SYMBOL(ieee80211_stop_queues);
476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
478 struct ieee80211_local *local = hw_to_local(hw);
482 if (WARN_ON(queue >= hw->queues))
485 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
486 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
487 &local->queue_stop_reasons[queue]);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 unsigned long queues,
495 enum queue_stop_reason reason,
498 struct ieee80211_local *local = hw_to_local(hw);
502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
504 for_each_set_bit(i, &queues, hw->queues)
505 __ieee80211_wake_queue(hw, i, reason, refcounted);
507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
513 IEEE80211_QUEUE_STOP_REASON_DRIVER,
516 EXPORT_SYMBOL(ieee80211_wake_queues);
519 ieee80211_get_vif_queues(struct ieee80211_local *local,
520 struct ieee80211_sub_if_data *sdata)
524 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
529 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
530 queues |= BIT(sdata->vif.hw_queue[ac]);
531 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
532 queues |= BIT(sdata->vif.cab_queue);
535 queues = BIT(local->hw.queues) - 1;
541 void __ieee80211_flush_queues(struct ieee80211_local *local,
542 struct ieee80211_sub_if_data *sdata,
543 unsigned int queues, bool drop)
545 if (!local->ops->flush)
549 * If no queue was set, or if the HW doesn't support
550 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
552 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
553 queues = ieee80211_get_vif_queues(local, sdata);
555 ieee80211_stop_queues_by_reason(&local->hw, queues,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH,
559 drv_flush(local, sdata, queues, drop);
561 ieee80211_wake_queues_by_reason(&local->hw, queues,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH,
566 void ieee80211_flush_queues(struct ieee80211_local *local,
567 struct ieee80211_sub_if_data *sdata, bool drop)
569 __ieee80211_flush_queues(local, sdata, 0, drop);
572 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
573 struct ieee80211_sub_if_data *sdata,
574 enum queue_stop_reason reason)
576 ieee80211_stop_queues_by_reason(&local->hw,
577 ieee80211_get_vif_queues(local, sdata),
581 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
582 struct ieee80211_sub_if_data *sdata,
583 enum queue_stop_reason reason)
585 ieee80211_wake_queues_by_reason(&local->hw,
586 ieee80211_get_vif_queues(local, sdata),
590 static void __iterate_interfaces(struct ieee80211_local *local,
592 void (*iterator)(void *data, u8 *mac,
593 struct ieee80211_vif *vif),
596 struct ieee80211_sub_if_data *sdata;
597 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 switch (sdata->vif.type) {
601 case NL80211_IFTYPE_MONITOR:
602 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
605 case NL80211_IFTYPE_AP_VLAN:
610 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
611 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
613 if (ieee80211_sdata_running(sdata) || !active_only)
614 iterator(data, sdata->vif.addr,
618 sdata = rcu_dereference_check(local->monitor_sdata,
619 lockdep_is_held(&local->iflist_mtx) ||
620 lockdep_rtnl_is_held());
622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
623 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
624 iterator(data, sdata->vif.addr, &sdata->vif);
627 void ieee80211_iterate_interfaces(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
633 struct ieee80211_local *local = hw_to_local(hw);
635 mutex_lock(&local->iflist_mtx);
636 __iterate_interfaces(local, iter_flags, iterator, data);
637 mutex_unlock(&local->iflist_mtx);
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
641 void ieee80211_iterate_active_interfaces_atomic(
642 struct ieee80211_hw *hw, u32 iter_flags,
643 void (*iterator)(void *data, u8 *mac,
644 struct ieee80211_vif *vif),
647 struct ieee80211_local *local = hw_to_local(hw);
650 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
656 void ieee80211_iterate_active_interfaces_rtnl(
657 struct ieee80211_hw *hw, u32 iter_flags,
658 void (*iterator)(void *data, u8 *mac,
659 struct ieee80211_vif *vif),
662 struct ieee80211_local *local = hw_to_local(hw);
666 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
671 static void __iterate_stations(struct ieee80211_local *local,
672 void (*iterator)(void *data,
673 struct ieee80211_sta *sta),
676 struct sta_info *sta;
678 list_for_each_entry_rcu(sta, &local->sta_list, list) {
682 iterator(data, &sta->sta);
686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
687 void (*iterator)(void *data,
688 struct ieee80211_sta *sta),
691 struct ieee80211_local *local = hw_to_local(hw);
694 __iterate_stations(local, iterator, data);
697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
701 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
703 if (!ieee80211_sdata_running(sdata) ||
704 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
712 struct ieee80211_sub_if_data *sdata;
717 sdata = vif_to_sdata(vif);
719 if (!ieee80211_sdata_running(sdata) ||
720 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
728 * Nothing should have been stuffed into the workqueue during
729 * the suspend->resume cycle. Since we can't check each caller
730 * of this function if we are already quiescing / suspended,
731 * check here and don't WARN since this can actually happen when
732 * the rx path (for example) is racing against __ieee80211_suspend
733 * and suspending / quiescing was set after the rx path checked
736 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
738 if (local->quiescing || (local->suspended && !local->resuming)) {
739 pr_warn("queueing ieee80211 work while going to suspend\n");
746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
748 struct ieee80211_local *local = hw_to_local(hw);
750 if (!ieee80211_can_queue_work(local))
753 queue_work(local->workqueue, work);
755 EXPORT_SYMBOL(ieee80211_queue_work);
757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
758 struct delayed_work *dwork,
761 struct ieee80211_local *local = hw_to_local(hw);
763 if (!ieee80211_can_queue_work(local))
766 queue_delayed_work(local->workqueue, dwork, delay);
768 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
771 struct ieee802_11_elems *elems,
775 const u8 *pos = start;
776 bool calc_crc = filter != 0;
777 DECLARE_BITMAP(seen_elems, 256);
780 bitmap_zero(seen_elems, 256);
781 memset(elems, 0, sizeof(*elems));
782 elems->ie_start = start;
783 elems->total_len = len;
787 bool elem_parse_failed;
794 elems->parse_error = true;
800 case WLAN_EID_SUPP_RATES:
801 case WLAN_EID_FH_PARAMS:
802 case WLAN_EID_DS_PARAMS:
803 case WLAN_EID_CF_PARAMS:
805 case WLAN_EID_IBSS_PARAMS:
806 case WLAN_EID_CHALLENGE:
808 case WLAN_EID_ERP_INFO:
809 case WLAN_EID_EXT_SUPP_RATES:
810 case WLAN_EID_HT_CAPABILITY:
811 case WLAN_EID_HT_OPERATION:
812 case WLAN_EID_VHT_CAPABILITY:
813 case WLAN_EID_VHT_OPERATION:
814 case WLAN_EID_MESH_ID:
815 case WLAN_EID_MESH_CONFIG:
816 case WLAN_EID_PEER_MGMT:
821 case WLAN_EID_CHANNEL_SWITCH:
822 case WLAN_EID_EXT_CHANSWITCH_ANN:
823 case WLAN_EID_COUNTRY:
824 case WLAN_EID_PWR_CONSTRAINT:
825 case WLAN_EID_TIMEOUT_INTERVAL:
826 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
827 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
828 case WLAN_EID_CHAN_SWITCH_PARAM:
829 case WLAN_EID_EXT_CAPABILITY:
830 case WLAN_EID_CHAN_SWITCH_TIMING:
831 case WLAN_EID_LINK_ID:
832 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
834 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
835 * that if the content gets bigger it might be needed more than once
837 if (test_bit(id, seen_elems)) {
838 elems->parse_error = true;
846 if (calc_crc && id < 64 && (filter & (1ULL << id)))
847 crc = crc32_be(crc, pos - 2, elen + 2);
849 elem_parse_failed = false;
852 case WLAN_EID_LINK_ID:
853 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
854 elem_parse_failed = true;
857 elems->lnk_id = (void *)(pos - 2);
859 case WLAN_EID_CHAN_SWITCH_TIMING:
860 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
861 elem_parse_failed = true;
864 elems->ch_sw_timing = (void *)pos;
866 case WLAN_EID_EXT_CAPABILITY:
867 elems->ext_capab = pos;
868 elems->ext_capab_len = elen;
872 elems->ssid_len = elen;
874 case WLAN_EID_SUPP_RATES:
875 elems->supp_rates = pos;
876 elems->supp_rates_len = elen;
878 case WLAN_EID_DS_PARAMS:
880 elems->ds_params = pos;
882 elem_parse_failed = true;
885 if (elen >= sizeof(struct ieee80211_tim_ie)) {
886 elems->tim = (void *)pos;
887 elems->tim_len = elen;
889 elem_parse_failed = true;
891 case WLAN_EID_CHALLENGE:
892 elems->challenge = pos;
893 elems->challenge_len = elen;
895 case WLAN_EID_VENDOR_SPECIFIC:
896 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
898 /* Microsoft OUI (00:50:F2) */
901 crc = crc32_be(crc, pos - 2, elen + 2);
903 if (elen >= 5 && pos[3] == 2) {
904 /* OUI Type 2 - WMM IE */
906 elems->wmm_info = pos;
907 elems->wmm_info_len = elen;
908 } else if (pos[4] == 1) {
909 elems->wmm_param = pos;
910 elems->wmm_param_len = elen;
917 elems->rsn_len = elen;
919 case WLAN_EID_ERP_INFO:
921 elems->erp_info = pos;
923 elem_parse_failed = true;
925 case WLAN_EID_EXT_SUPP_RATES:
926 elems->ext_supp_rates = pos;
927 elems->ext_supp_rates_len = elen;
929 case WLAN_EID_HT_CAPABILITY:
930 if (elen >= sizeof(struct ieee80211_ht_cap))
931 elems->ht_cap_elem = (void *)pos;
933 elem_parse_failed = true;
935 case WLAN_EID_HT_OPERATION:
936 if (elen >= sizeof(struct ieee80211_ht_operation))
937 elems->ht_operation = (void *)pos;
939 elem_parse_failed = true;
941 case WLAN_EID_VHT_CAPABILITY:
942 if (elen >= sizeof(struct ieee80211_vht_cap))
943 elems->vht_cap_elem = (void *)pos;
945 elem_parse_failed = true;
947 case WLAN_EID_VHT_OPERATION:
948 if (elen >= sizeof(struct ieee80211_vht_operation))
949 elems->vht_operation = (void *)pos;
951 elem_parse_failed = true;
953 case WLAN_EID_OPMODE_NOTIF:
955 elems->opmode_notif = pos;
957 elem_parse_failed = true;
959 case WLAN_EID_MESH_ID:
960 elems->mesh_id = pos;
961 elems->mesh_id_len = elen;
963 case WLAN_EID_MESH_CONFIG:
964 if (elen >= sizeof(struct ieee80211_meshconf_ie))
965 elems->mesh_config = (void *)pos;
967 elem_parse_failed = true;
969 case WLAN_EID_PEER_MGMT:
970 elems->peering = pos;
971 elems->peering_len = elen;
973 case WLAN_EID_MESH_AWAKE_WINDOW:
975 elems->awake_window = (void *)pos;
979 elems->preq_len = elen;
983 elems->prep_len = elen;
987 elems->perr_len = elen;
990 if (elen >= sizeof(struct ieee80211_rann_ie))
991 elems->rann = (void *)pos;
993 elem_parse_failed = true;
995 case WLAN_EID_CHANNEL_SWITCH:
996 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
997 elem_parse_failed = true;
1000 elems->ch_switch_ie = (void *)pos;
1002 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004 elem_parse_failed = true;
1007 elems->ext_chansw_ie = (void *)pos;
1009 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011 elem_parse_failed = true;
1014 elems->sec_chan_offs = (void *)pos;
1016 case WLAN_EID_CHAN_SWITCH_PARAM:
1018 sizeof(*elems->mesh_chansw_params_ie)) {
1019 elem_parse_failed = true;
1022 elems->mesh_chansw_params_ie = (void *)pos;
1024 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1026 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027 elem_parse_failed = true;
1030 elems->wide_bw_chansw_ie = (void *)pos;
1032 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1034 elem_parse_failed = true;
1038 * This is a bit tricky, but as we only care about
1039 * the wide bandwidth channel switch element, so
1040 * just parse it out manually.
1042 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1045 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046 elems->wide_bw_chansw_ie =
1049 elem_parse_failed = true;
1052 case WLAN_EID_COUNTRY:
1053 elems->country_elem = pos;
1054 elems->country_elem_len = elen;
1056 case WLAN_EID_PWR_CONSTRAINT:
1058 elem_parse_failed = true;
1061 elems->pwr_constr_elem = pos;
1063 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064 /* Lots of different options exist, but we only care
1065 * about the Dynamic Transmit Power Control element.
1066 * First check for the Cisco OUI, then for the DTPC
1070 elem_parse_failed = true;
1074 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075 pos[2] != 0x96 || pos[3] != 0x00)
1079 elem_parse_failed = true;
1084 crc = crc32_be(crc, pos - 2, elen + 2);
1086 elems->cisco_dtpc_elem = pos;
1088 case WLAN_EID_TIMEOUT_INTERVAL:
1089 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090 elems->timeout_int = (void *)pos;
1092 elem_parse_failed = true;
1094 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095 if (elen >= sizeof(*elems->max_idle_period_ie))
1096 elems->max_idle_period_ie = (void *)pos;
1098 case WLAN_EID_EXTENSION:
1099 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1100 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1101 elems->mu_edca_param_set = (void *)&pos[1];
1102 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1103 elems->he_cap = (void *)&pos[1];
1104 elems->he_cap_len = elen - 1;
1105 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1106 elen >= sizeof(*elems->he_operation) &&
1107 elen >= ieee80211_he_oper_size(&pos[1])) {
1108 elems->he_operation = (void *)&pos[1];
1109 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1110 elems->uora_element = (void *)&pos[1];
1117 if (elem_parse_failed)
1118 elems->parse_error = true;
1120 __set_bit(id, seen_elems);
1127 elems->parse_error = true;
1132 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1133 struct ieee80211_tx_queue_params
1136 struct ieee80211_chanctx_conf *chanctx_conf;
1137 const struct ieee80211_reg_rule *rrule;
1138 struct ieee80211_wmm_ac *wmm_ac;
1139 u16 center_freq = 0;
1141 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1142 sdata->vif.type != NL80211_IFTYPE_STATION)
1146 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148 center_freq = chanctx_conf->def.chan->center_freq;
1155 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1157 if (IS_ERR_OR_NULL(rrule) || !rrule->wmm_rule) {
1162 if (sdata->vif.type == NL80211_IFTYPE_AP)
1163 wmm_ac = &rrule->wmm_rule->ap[ac];
1165 wmm_ac = &rrule->wmm_rule->client[ac];
1166 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1167 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1168 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1169 qparam->txop = !qparam->txop ? wmm_ac->cot / 32 :
1170 min_t(u16, qparam->txop, wmm_ac->cot / 32);
1174 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1175 bool bss_notify, bool enable_qos)
1177 struct ieee80211_local *local = sdata->local;
1178 struct ieee80211_tx_queue_params qparam;
1179 struct ieee80211_chanctx_conf *chanctx_conf;
1182 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1185 if (!local->ops->conf_tx)
1188 if (local->hw.queues < IEEE80211_NUM_ACS)
1191 memset(&qparam, 0, sizeof(qparam));
1194 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1195 use_11b = (chanctx_conf &&
1196 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1197 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1200 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1202 /* Set defaults according to 802.11-2007 Table 7-37 */
1209 /* Confiure old 802.11b/g medium access rules. */
1210 qparam.cw_max = aCWmax;
1211 qparam.cw_min = aCWmin;
1215 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1216 /* Update if QoS is enabled. */
1219 case IEEE80211_AC_BK:
1220 qparam.cw_max = aCWmax;
1221 qparam.cw_min = aCWmin;
1228 /* never happens but let's not leave undefined */
1230 case IEEE80211_AC_BE:
1231 qparam.cw_max = aCWmax;
1232 qparam.cw_min = aCWmin;
1239 case IEEE80211_AC_VI:
1240 qparam.cw_max = aCWmin;
1241 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1245 qparam.txop = 6016/32;
1247 qparam.txop = 3008/32;
1254 case IEEE80211_AC_VO:
1255 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1256 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1260 qparam.txop = 3264/32;
1262 qparam.txop = 1504/32;
1267 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1269 qparam.uapsd = false;
1271 sdata->tx_conf[ac] = qparam;
1272 drv_conf_tx(local, sdata, ac, &qparam);
1275 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1276 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1277 sdata->vif.type != NL80211_IFTYPE_NAN) {
1278 sdata->vif.bss_conf.qos = enable_qos;
1280 ieee80211_bss_info_change_notify(sdata,
1285 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1286 u16 transaction, u16 auth_alg, u16 status,
1287 const u8 *extra, size_t extra_len, const u8 *da,
1288 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1291 struct ieee80211_local *local = sdata->local;
1292 struct sk_buff *skb;
1293 struct ieee80211_mgmt *mgmt;
1296 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1297 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1298 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1302 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1304 mgmt = skb_put_zero(skb, 24 + 6);
1305 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1306 IEEE80211_STYPE_AUTH);
1307 memcpy(mgmt->da, da, ETH_ALEN);
1308 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1309 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1310 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1311 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1312 mgmt->u.auth.status_code = cpu_to_le16(status);
1314 skb_put_data(skb, extra, extra_len);
1316 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1317 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1318 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1322 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1324 ieee80211_tx_skb(sdata, skb);
1327 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1328 const u8 *bssid, u16 stype, u16 reason,
1329 bool send_frame, u8 *frame_buf)
1331 struct ieee80211_local *local = sdata->local;
1332 struct sk_buff *skb;
1333 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1336 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1337 mgmt->duration = 0; /* initialize only */
1338 mgmt->seq_ctrl = 0; /* initialize only */
1339 memcpy(mgmt->da, bssid, ETH_ALEN);
1340 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1341 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1342 /* u.deauth.reason_code == u.disassoc.reason_code */
1343 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1346 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1347 IEEE80211_DEAUTH_FRAME_LEN);
1351 skb_reserve(skb, local->hw.extra_tx_headroom);
1354 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1356 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1357 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1358 IEEE80211_SKB_CB(skb)->flags |=
1359 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1361 ieee80211_tx_skb(sdata, skb);
1365 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1366 u8 *buffer, size_t buffer_len,
1367 const u8 *ie, size_t ie_len,
1368 enum nl80211_band band,
1370 struct cfg80211_chan_def *chandef,
1371 size_t *offset, u32 flags)
1373 struct ieee80211_supported_band *sband;
1374 const struct ieee80211_sta_he_cap *he_cap;
1375 u8 *pos = buffer, *end = buffer + buffer_len;
1377 int supp_rates_len, i;
1383 bool have_80mhz = false;
1387 sband = local->hw.wiphy->bands[band];
1388 if (WARN_ON_ONCE(!sband))
1391 rate_flags = ieee80211_chandef_rate_flags(chandef);
1392 shift = ieee80211_chandef_get_shift(chandef);
1395 for (i = 0; i < sband->n_bitrates; i++) {
1396 if ((BIT(i) & rate_mask) == 0)
1397 continue; /* skip rate */
1398 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1401 rates[num_rates++] =
1402 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1406 supp_rates_len = min_t(int, num_rates, 8);
1408 if (end - pos < 2 + supp_rates_len)
1410 *pos++ = WLAN_EID_SUPP_RATES;
1411 *pos++ = supp_rates_len;
1412 memcpy(pos, rates, supp_rates_len);
1413 pos += supp_rates_len;
1415 /* insert "request information" if in custom IEs */
1417 static const u8 before_extrates[] = {
1419 WLAN_EID_SUPP_RATES,
1422 noffset = ieee80211_ie_split(ie, ie_len,
1424 ARRAY_SIZE(before_extrates),
1426 if (end - pos < noffset - *offset)
1428 memcpy(pos, ie + *offset, noffset - *offset);
1429 pos += noffset - *offset;
1433 ext_rates_len = num_rates - supp_rates_len;
1434 if (ext_rates_len > 0) {
1435 if (end - pos < 2 + ext_rates_len)
1437 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1438 *pos++ = ext_rates_len;
1439 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1440 pos += ext_rates_len;
1443 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1446 *pos++ = WLAN_EID_DS_PARAMS;
1448 *pos++ = ieee80211_frequency_to_channel(
1449 chandef->chan->center_freq);
1452 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1455 /* insert custom IEs that go before HT */
1457 static const u8 before_ht[] = {
1459 * no need to list the ones split off already
1460 * (or generated here)
1463 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1465 noffset = ieee80211_ie_split(ie, ie_len,
1466 before_ht, ARRAY_SIZE(before_ht),
1468 if (end - pos < noffset - *offset)
1470 memcpy(pos, ie + *offset, noffset - *offset);
1471 pos += noffset - *offset;
1475 if (sband->ht_cap.ht_supported) {
1476 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1478 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1482 /* insert custom IEs that go before VHT */
1484 static const u8 before_vht[] = {
1486 * no need to list the ones split off already
1487 * (or generated here)
1489 WLAN_EID_BSS_COEX_2040,
1490 WLAN_EID_EXT_CAPABILITY,
1492 WLAN_EID_CHANNEL_USAGE,
1493 WLAN_EID_INTERWORKING,
1495 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1497 noffset = ieee80211_ie_split(ie, ie_len,
1498 before_vht, ARRAY_SIZE(before_vht),
1500 if (end - pos < noffset - *offset)
1502 memcpy(pos, ie + *offset, noffset - *offset);
1503 pos += noffset - *offset;
1507 /* Check if any channel in this sband supports at least 80 MHz */
1508 for (i = 0; i < sband->n_channels; i++) {
1509 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1510 IEEE80211_CHAN_NO_80MHZ))
1517 if (sband->vht_cap.vht_supported && have_80mhz) {
1518 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1520 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1521 sband->vht_cap.cap);
1524 /* insert custom IEs that go before HE */
1526 static const u8 before_he[] = {
1528 * no need to list the ones split off before VHT
1531 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1533 /* TODO: add 11ah/11aj/11ak elements */
1535 noffset = ieee80211_ie_split(ie, ie_len,
1536 before_he, ARRAY_SIZE(before_he),
1538 if (end - pos < noffset - *offset)
1540 memcpy(pos, ie + *offset, noffset - *offset);
1541 pos += noffset - *offset;
1545 he_cap = ieee80211_get_he_sta_cap(sband);
1547 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1553 * If adding more here, adjust code in main.c
1554 * that calculates local->scan_ies_len.
1557 return pos - buffer;
1559 WARN_ONCE(1, "not enough space for preq IEs\n");
1561 return pos - buffer;
1564 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1566 struct ieee80211_scan_ies *ie_desc,
1567 const u8 *ie, size_t ie_len,
1568 u8 bands_used, u32 *rate_masks,
1569 struct cfg80211_chan_def *chandef,
1572 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1575 memset(ie_desc, 0, sizeof(*ie_desc));
1577 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1578 if (bands_used & BIT(i)) {
1579 pos += ieee80211_build_preq_ies_band(local,
1587 ie_desc->ies[i] = buffer + old_pos;
1588 ie_desc->len[i] = pos - old_pos;
1593 /* add any remaining custom IEs */
1595 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1596 "not enough space for preq custom IEs\n"))
1598 memcpy(buffer + pos, ie + custom_ie_offset,
1599 ie_len - custom_ie_offset);
1600 ie_desc->common_ies = buffer + pos;
1601 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1602 pos += ie_len - custom_ie_offset;
1608 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1609 const u8 *src, const u8 *dst,
1611 struct ieee80211_channel *chan,
1612 const u8 *ssid, size_t ssid_len,
1613 const u8 *ie, size_t ie_len,
1616 struct ieee80211_local *local = sdata->local;
1617 struct cfg80211_chan_def chandef;
1618 struct sk_buff *skb;
1619 struct ieee80211_mgmt *mgmt;
1621 u32 rate_masks[NUM_NL80211_BANDS] = {};
1622 struct ieee80211_scan_ies dummy_ie_desc;
1625 * Do not send DS Channel parameter for directed probe requests
1626 * in order to maximize the chance that we get a response. Some
1627 * badly-behaved APs don't respond when this parameter is included.
1629 chandef.width = sdata->vif.bss_conf.chandef.width;
1630 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1631 chandef.chan = NULL;
1633 chandef.chan = chan;
1635 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1640 rate_masks[chan->band] = ratemask;
1641 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1642 skb_tailroom(skb), &dummy_ie_desc,
1643 ie, ie_len, BIT(chan->band),
1644 rate_masks, &chandef, flags);
1645 skb_put(skb, ies_len);
1648 mgmt = (struct ieee80211_mgmt *) skb->data;
1649 memcpy(mgmt->da, dst, ETH_ALEN);
1650 memcpy(mgmt->bssid, dst, ETH_ALEN);
1653 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1658 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1659 struct ieee802_11_elems *elems,
1660 enum nl80211_band band, u32 *basic_rates)
1662 struct ieee80211_supported_band *sband;
1664 u32 supp_rates, rate_flags;
1667 sband = sdata->local->hw.wiphy->bands[band];
1668 if (WARN_ON(!sband))
1671 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1672 shift = ieee80211_vif_get_shift(&sdata->vif);
1674 num_rates = sband->n_bitrates;
1676 for (i = 0; i < elems->supp_rates_len +
1677 elems->ext_supp_rates_len; i++) {
1681 if (i < elems->supp_rates_len)
1682 rate = elems->supp_rates[i];
1683 else if (elems->ext_supp_rates)
1684 rate = elems->ext_supp_rates
1685 [i - elems->supp_rates_len];
1686 own_rate = 5 * (rate & 0x7f);
1687 is_basic = !!(rate & 0x80);
1689 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1692 for (j = 0; j < num_rates; j++) {
1694 if ((rate_flags & sband->bitrates[j].flags)
1698 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1701 if (brate == own_rate) {
1702 supp_rates |= BIT(j);
1703 if (basic_rates && is_basic)
1704 *basic_rates |= BIT(j);
1711 void ieee80211_stop_device(struct ieee80211_local *local)
1713 ieee80211_led_radio(local, false);
1714 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1716 cancel_work_sync(&local->reconfig_filter);
1718 flush_workqueue(local->workqueue);
1722 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1725 /* It's possible that we don't handle the scan completion in
1726 * time during suspend, so if it's still marked as completed
1727 * here, queue the work and flush it to clean things up.
1728 * Instead of calling the worker function directly here, we
1729 * really queue it to avoid potential races with other flows
1730 * scheduling the same work.
1732 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1733 /* If coming from reconfiguration failure, abort the scan so
1734 * we don't attempt to continue a partial HW scan - which is
1735 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1736 * completed scan, and a 5 GHz portion is still pending.
1739 set_bit(SCAN_ABORTED, &local->scanning);
1740 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1741 flush_delayed_work(&local->scan_work);
1745 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1747 struct ieee80211_sub_if_data *sdata;
1748 struct ieee80211_chanctx *ctx;
1751 * We get here if during resume the device can't be restarted properly.
1752 * We might also get here if this happens during HW reset, which is a
1753 * slightly different situation and we need to drop all connections in
1756 * Ask cfg80211 to turn off all interfaces, this will result in more
1757 * warnings but at least we'll then get into a clean stopped state.
1760 local->resuming = false;
1761 local->suspended = false;
1762 local->in_reconfig = false;
1764 ieee80211_flush_completed_scan(local, true);
1766 /* scheduled scan clearly can't be running any more, but tell
1767 * cfg80211 and clear local state
1769 ieee80211_sched_scan_end(local);
1771 list_for_each_entry(sdata, &local->interfaces, list)
1772 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1774 /* Mark channel contexts as not being in the driver any more to avoid
1775 * removing them from the driver during the shutdown process...
1777 mutex_lock(&local->chanctx_mtx);
1778 list_for_each_entry(ctx, &local->chanctx_list, list)
1779 ctx->driver_present = false;
1780 mutex_unlock(&local->chanctx_mtx);
1782 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1785 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1786 struct ieee80211_sub_if_data *sdata)
1788 struct ieee80211_chanctx_conf *conf;
1789 struct ieee80211_chanctx *ctx;
1791 if (!local->use_chanctx)
1794 mutex_lock(&local->chanctx_mtx);
1795 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1796 lockdep_is_held(&local->chanctx_mtx));
1798 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1799 drv_assign_vif_chanctx(local, sdata, ctx);
1801 mutex_unlock(&local->chanctx_mtx);
1804 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1806 struct ieee80211_local *local = sdata->local;
1807 struct sta_info *sta;
1810 mutex_lock(&local->sta_mtx);
1811 list_for_each_entry(sta, &local->sta_list, list) {
1812 enum ieee80211_sta_state state;
1814 if (!sta->uploaded || sta->sdata != sdata)
1817 for (state = IEEE80211_STA_NOTEXIST;
1818 state < sta->sta_state; state++)
1819 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1822 mutex_unlock(&local->sta_mtx);
1825 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1827 struct cfg80211_nan_func *func, **funcs;
1830 res = drv_start_nan(sdata->local, sdata,
1831 &sdata->u.nan.conf);
1835 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1841 /* Add all the functions:
1842 * This is a little bit ugly. We need to call a potentially sleeping
1843 * callback for each NAN function, so we can't hold the spinlock.
1845 spin_lock_bh(&sdata->u.nan.func_lock);
1847 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1850 spin_unlock_bh(&sdata->u.nan.func_lock);
1852 for (i = 0; funcs[i]; i++) {
1853 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1855 ieee80211_nan_func_terminated(&sdata->vif,
1856 funcs[i]->instance_id,
1857 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1866 int ieee80211_reconfig(struct ieee80211_local *local)
1868 struct ieee80211_hw *hw = &local->hw;
1869 struct ieee80211_sub_if_data *sdata;
1870 struct ieee80211_chanctx *ctx;
1871 struct sta_info *sta;
1873 bool reconfig_due_to_wowlan = false;
1874 struct ieee80211_sub_if_data *sched_scan_sdata;
1875 struct cfg80211_sched_scan_request *sched_scan_req;
1876 bool sched_scan_stopped = false;
1877 bool suspended = local->suspended;
1879 /* nothing to do if HW shouldn't run */
1880 if (!local->open_count)
1885 local->resuming = true;
1887 if (local->wowlan) {
1889 * In the wowlan case, both mac80211 and the device
1890 * are functional when the resume op is called, so
1891 * clear local->suspended so the device could operate
1892 * normally (e.g. pass rx frames).
1894 local->suspended = false;
1895 res = drv_resume(local);
1896 local->wowlan = false;
1898 local->resuming = false;
1905 * res is 1, which means the driver requested
1906 * to go through a regular reset on wakeup.
1907 * restore local->suspended in this case.
1909 reconfig_due_to_wowlan = true;
1910 local->suspended = true;
1915 * In case of hw_restart during suspend (without wowlan),
1916 * cancel restart work, as we are reconfiguring the device
1918 * Note that restart_work is scheduled on a frozen workqueue,
1919 * so we can't deadlock in this case.
1921 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1922 cancel_work_sync(&local->restart_work);
1924 local->started = false;
1927 * Upon resume hardware can sometimes be goofy due to
1928 * various platform / driver / bus issues, so restarting
1929 * the device may at times not work immediately. Propagate
1932 res = drv_start(local);
1935 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1937 WARN(1, "Hardware became unavailable during restart.\n");
1938 ieee80211_handle_reconfig_failure(local);
1942 /* setup fragmentation threshold */
1943 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1945 /* setup RTS threshold */
1946 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1948 /* reset coverage class */
1949 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1951 ieee80211_led_radio(local, true);
1952 ieee80211_mod_tpt_led_trig(local,
1953 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1955 /* add interfaces */
1956 sdata = rtnl_dereference(local->monitor_sdata);
1958 /* in HW restart it exists already */
1959 WARN_ON(local->resuming);
1960 res = drv_add_interface(local, sdata);
1962 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1968 list_for_each_entry(sdata, &local->interfaces, list) {
1969 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1970 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1971 ieee80211_sdata_running(sdata)) {
1972 res = drv_add_interface(local, sdata);
1978 /* If adding any of the interfaces failed above, roll back and
1982 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1984 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1985 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1986 ieee80211_sdata_running(sdata))
1987 drv_remove_interface(local, sdata);
1988 ieee80211_handle_reconfig_failure(local);
1992 /* add channel contexts */
1993 if (local->use_chanctx) {
1994 mutex_lock(&local->chanctx_mtx);
1995 list_for_each_entry(ctx, &local->chanctx_list, list)
1996 if (ctx->replace_state !=
1997 IEEE80211_CHANCTX_REPLACES_OTHER)
1998 WARN_ON(drv_add_chanctx(local, ctx));
1999 mutex_unlock(&local->chanctx_mtx);
2001 sdata = rtnl_dereference(local->monitor_sdata);
2002 if (sdata && ieee80211_sdata_running(sdata))
2003 ieee80211_assign_chanctx(local, sdata);
2006 /* reconfigure hardware */
2007 ieee80211_hw_config(local, ~0);
2009 ieee80211_configure_filter(local);
2011 /* Finally also reconfigure all the BSS information */
2012 list_for_each_entry(sdata, &local->interfaces, list) {
2015 if (!ieee80211_sdata_running(sdata))
2018 ieee80211_assign_chanctx(local, sdata);
2020 switch (sdata->vif.type) {
2021 case NL80211_IFTYPE_AP_VLAN:
2022 case NL80211_IFTYPE_MONITOR:
2025 ieee80211_reconfig_stations(sdata);
2027 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2028 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2029 drv_conf_tx(local, sdata, i,
2030 &sdata->tx_conf[i]);
2034 /* common change flags for all interface types */
2035 changed = BSS_CHANGED_ERP_CTS_PROT |
2036 BSS_CHANGED_ERP_PREAMBLE |
2037 BSS_CHANGED_ERP_SLOT |
2039 BSS_CHANGED_BASIC_RATES |
2040 BSS_CHANGED_BEACON_INT |
2045 BSS_CHANGED_TXPOWER |
2046 BSS_CHANGED_MCAST_RATE;
2048 if (sdata->vif.mu_mimo_owner)
2049 changed |= BSS_CHANGED_MU_GROUPS;
2051 switch (sdata->vif.type) {
2052 case NL80211_IFTYPE_STATION:
2053 changed |= BSS_CHANGED_ASSOC |
2054 BSS_CHANGED_ARP_FILTER |
2057 /* Re-send beacon info report to the driver */
2058 if (sdata->u.mgd.have_beacon)
2059 changed |= BSS_CHANGED_BEACON_INFO;
2061 if (sdata->vif.bss_conf.max_idle_period ||
2062 sdata->vif.bss_conf.protected_keep_alive)
2063 changed |= BSS_CHANGED_KEEP_ALIVE;
2066 ieee80211_bss_info_change_notify(sdata, changed);
2067 sdata_unlock(sdata);
2069 case NL80211_IFTYPE_OCB:
2070 changed |= BSS_CHANGED_OCB;
2071 ieee80211_bss_info_change_notify(sdata, changed);
2073 case NL80211_IFTYPE_ADHOC:
2074 changed |= BSS_CHANGED_IBSS;
2076 case NL80211_IFTYPE_AP:
2077 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2079 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2080 changed |= BSS_CHANGED_AP_PROBE_RESP;
2082 if (rcu_access_pointer(sdata->u.ap.beacon))
2083 drv_start_ap(local, sdata);
2087 case NL80211_IFTYPE_MESH_POINT:
2088 if (sdata->vif.bss_conf.enable_beacon) {
2089 changed |= BSS_CHANGED_BEACON |
2090 BSS_CHANGED_BEACON_ENABLED;
2091 ieee80211_bss_info_change_notify(sdata, changed);
2094 case NL80211_IFTYPE_NAN:
2095 res = ieee80211_reconfig_nan(sdata);
2097 ieee80211_handle_reconfig_failure(local);
2101 case NL80211_IFTYPE_WDS:
2102 case NL80211_IFTYPE_AP_VLAN:
2103 case NL80211_IFTYPE_MONITOR:
2104 case NL80211_IFTYPE_P2P_DEVICE:
2107 case NL80211_IFTYPE_UNSPECIFIED:
2108 case NUM_NL80211_IFTYPES:
2109 case NL80211_IFTYPE_P2P_CLIENT:
2110 case NL80211_IFTYPE_P2P_GO:
2116 ieee80211_recalc_ps(local);
2119 * The sta might be in psm against the ap (e.g. because
2120 * this was the state before a hw restart), so we
2121 * explicitly send a null packet in order to make sure
2122 * it'll sync against the ap (and get out of psm).
2124 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2125 list_for_each_entry(sdata, &local->interfaces, list) {
2126 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2128 if (!sdata->u.mgd.associated)
2131 ieee80211_send_nullfunc(local, sdata, false);
2135 /* APs are now beaconing, add back stations */
2136 mutex_lock(&local->sta_mtx);
2137 list_for_each_entry(sta, &local->sta_list, list) {
2138 enum ieee80211_sta_state state;
2143 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2144 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2147 for (state = IEEE80211_STA_NOTEXIST;
2148 state < sta->sta_state; state++)
2149 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2152 mutex_unlock(&local->sta_mtx);
2155 list_for_each_entry(sdata, &local->interfaces, list)
2156 ieee80211_reset_crypto_tx_tailroom(sdata);
2158 list_for_each_entry(sdata, &local->interfaces, list)
2159 if (ieee80211_sdata_running(sdata))
2160 ieee80211_enable_keys(sdata);
2162 /* Reconfigure sched scan if it was interrupted by FW restart */
2163 mutex_lock(&local->mtx);
2164 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2165 lockdep_is_held(&local->mtx));
2166 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2167 lockdep_is_held(&local->mtx));
2168 if (sched_scan_sdata && sched_scan_req)
2170 * Sched scan stopped, but we don't want to report it. Instead,
2171 * we're trying to reschedule. However, if more than one scan
2172 * plan was set, we cannot reschedule since we don't know which
2173 * scan plan was currently running (and some scan plans may have
2174 * already finished).
2176 if (sched_scan_req->n_scan_plans > 1 ||
2177 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2179 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2180 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2181 sched_scan_stopped = true;
2183 mutex_unlock(&local->mtx);
2185 if (sched_scan_stopped)
2186 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2190 if (local->monitors == local->open_count && local->monitors > 0)
2191 ieee80211_add_virtual_monitor(local);
2194 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2195 * sessions can be established after a resume.
2197 * Also tear down aggregation sessions since reconfiguring
2198 * them in a hardware restart scenario is not easily done
2199 * right now, and the hardware will have lost information
2200 * about the sessions, but we and the AP still think they
2201 * are active. This is really a workaround though.
2203 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2204 mutex_lock(&local->sta_mtx);
2206 list_for_each_entry(sta, &local->sta_list, list) {
2207 if (!local->resuming)
2208 ieee80211_sta_tear_down_BA_sessions(
2209 sta, AGG_STOP_LOCAL_REQUEST);
2210 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2213 mutex_unlock(&local->sta_mtx);
2216 if (local->in_reconfig) {
2217 local->in_reconfig = false;
2220 /* Restart deferred ROCs */
2221 mutex_lock(&local->mtx);
2222 ieee80211_start_next_roc(local);
2223 mutex_unlock(&local->mtx);
2226 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2227 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2231 * If this is for hw restart things are still running.
2232 * We may want to change that later, however.
2234 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2235 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2241 /* first set suspended false, then resuming */
2242 local->suspended = false;
2244 local->resuming = false;
2246 ieee80211_flush_completed_scan(local, false);
2248 if (local->open_count && !reconfig_due_to_wowlan)
2249 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2251 list_for_each_entry(sdata, &local->interfaces, list) {
2252 if (!ieee80211_sdata_running(sdata))
2254 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2255 ieee80211_sta_restart(sdata);
2258 mod_timer(&local->sta_cleanup, jiffies + 1);
2266 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2268 struct ieee80211_sub_if_data *sdata;
2269 struct ieee80211_local *local;
2270 struct ieee80211_key *key;
2275 sdata = vif_to_sdata(vif);
2276 local = sdata->local;
2278 if (WARN_ON(!local->resuming))
2281 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2284 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2286 mutex_lock(&local->key_mtx);
2287 list_for_each_entry(key, &sdata->key_list, list)
2288 key->flags |= KEY_FLAG_TAINTED;
2289 mutex_unlock(&local->key_mtx);
2291 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2293 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2295 struct ieee80211_local *local = sdata->local;
2296 struct ieee80211_chanctx_conf *chanctx_conf;
2297 struct ieee80211_chanctx *chanctx;
2299 mutex_lock(&local->chanctx_mtx);
2301 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2302 lockdep_is_held(&local->chanctx_mtx));
2305 * This function can be called from a work, thus it may be possible
2306 * that the chanctx_conf is removed (due to a disconnection, for
2308 * So nothing should be done in such case.
2313 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2314 ieee80211_recalc_smps_chanctx(local, chanctx);
2316 mutex_unlock(&local->chanctx_mtx);
2319 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2321 struct ieee80211_local *local = sdata->local;
2322 struct ieee80211_chanctx_conf *chanctx_conf;
2323 struct ieee80211_chanctx *chanctx;
2325 mutex_lock(&local->chanctx_mtx);
2327 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2328 lockdep_is_held(&local->chanctx_mtx));
2330 if (WARN_ON_ONCE(!chanctx_conf))
2333 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2334 ieee80211_recalc_chanctx_min_def(local, chanctx);
2336 mutex_unlock(&local->chanctx_mtx);
2339 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2341 size_t pos = offset;
2343 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2344 pos += 2 + ies[pos + 1];
2349 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2353 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2355 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2359 * Scale up threshold values before storing it, as the RSSI averaging
2360 * algorithm uses a scaled up value as well. Change this scaling
2361 * factor if the RSSI averaging algorithm changes.
2363 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2364 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2367 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2371 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2373 WARN_ON(rssi_min_thold == rssi_max_thold ||
2374 rssi_min_thold > rssi_max_thold);
2376 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2379 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2381 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2383 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2385 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2387 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2389 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2394 *pos++ = WLAN_EID_HT_CAPABILITY;
2395 *pos++ = sizeof(struct ieee80211_ht_cap);
2396 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2398 /* capability flags */
2399 tmp = cpu_to_le16(cap);
2400 memcpy(pos, &tmp, sizeof(u16));
2403 /* AMPDU parameters */
2404 *pos++ = ht_cap->ampdu_factor |
2405 (ht_cap->ampdu_density <<
2406 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2409 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2410 pos += sizeof(ht_cap->mcs);
2412 /* extended capabilities */
2413 pos += sizeof(__le16);
2415 /* BF capabilities */
2416 pos += sizeof(__le32);
2418 /* antenna selection */
2424 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2429 *pos++ = WLAN_EID_VHT_CAPABILITY;
2430 *pos++ = sizeof(struct ieee80211_vht_cap);
2431 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2433 /* capability flags */
2434 tmp = cpu_to_le32(cap);
2435 memcpy(pos, &tmp, sizeof(u32));
2439 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2440 pos += sizeof(vht_cap->vht_mcs);
2445 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2446 const struct ieee80211_sta_he_cap *he_cap,
2453 /* Make sure we have place for the IE */
2455 * TODO: the 1 added is because this temporarily is under the EXTENSION
2456 * IE. Get rid of it when it moves.
2461 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2463 sizeof(he_cap->he_cap_elem) + n +
2464 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2465 he_cap->he_cap_elem.phy_cap_info);
2467 if ((end - pos) < ie_len)
2470 *pos++ = WLAN_EID_EXTENSION;
2471 pos++; /* We'll set the size later below */
2472 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2475 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2476 pos += sizeof(he_cap->he_cap_elem);
2478 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2481 /* Check if PPE Threshold should be present */
2482 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2483 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2487 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2488 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2490 n = hweight8(he_cap->ppe_thres[0] &
2491 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2492 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2493 IEEE80211_PPE_THRES_NSS_POS));
2496 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2499 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2500 n = DIV_ROUND_UP(n, 8);
2502 /* Copy PPE Thresholds */
2503 memcpy(pos, &he_cap->ppe_thres, n);
2507 orig_pos[1] = (pos - orig_pos) - 2;
2511 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2512 const struct cfg80211_chan_def *chandef,
2513 u16 prot_mode, bool rifs_mode)
2515 struct ieee80211_ht_operation *ht_oper;
2516 /* Build HT Information */
2517 *pos++ = WLAN_EID_HT_OPERATION;
2518 *pos++ = sizeof(struct ieee80211_ht_operation);
2519 ht_oper = (struct ieee80211_ht_operation *)pos;
2520 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2521 chandef->chan->center_freq);
2522 switch (chandef->width) {
2523 case NL80211_CHAN_WIDTH_160:
2524 case NL80211_CHAN_WIDTH_80P80:
2525 case NL80211_CHAN_WIDTH_80:
2526 case NL80211_CHAN_WIDTH_40:
2527 if (chandef->center_freq1 > chandef->chan->center_freq)
2528 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2530 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2533 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2536 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2537 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2538 chandef->width != NL80211_CHAN_WIDTH_20)
2539 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2542 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2544 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2545 ht_oper->stbc_param = 0x0000;
2547 /* It seems that Basic MCS set and Supported MCS set
2548 are identical for the first 10 bytes */
2549 memset(&ht_oper->basic_set, 0, 16);
2550 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2552 return pos + sizeof(struct ieee80211_ht_operation);
2555 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2556 const struct cfg80211_chan_def *chandef)
2558 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2559 *pos++ = 3; /* IE length */
2560 /* New channel width */
2561 switch (chandef->width) {
2562 case NL80211_CHAN_WIDTH_80:
2563 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2565 case NL80211_CHAN_WIDTH_160:
2566 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2568 case NL80211_CHAN_WIDTH_80P80:
2569 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2572 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2575 /* new center frequency segment 0 */
2576 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2577 /* new center frequency segment 1 */
2578 if (chandef->center_freq2)
2579 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2584 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2585 const struct cfg80211_chan_def *chandef)
2587 struct ieee80211_vht_operation *vht_oper;
2589 *pos++ = WLAN_EID_VHT_OPERATION;
2590 *pos++ = sizeof(struct ieee80211_vht_operation);
2591 vht_oper = (struct ieee80211_vht_operation *)pos;
2592 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2593 chandef->center_freq1);
2594 if (chandef->center_freq2)
2595 vht_oper->center_freq_seg1_idx =
2596 ieee80211_frequency_to_channel(chandef->center_freq2);
2598 vht_oper->center_freq_seg1_idx = 0x00;
2600 switch (chandef->width) {
2601 case NL80211_CHAN_WIDTH_160:
2603 * Convert 160 MHz channel width to new style as interop
2606 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2607 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2608 if (chandef->chan->center_freq < chandef->center_freq1)
2609 vht_oper->center_freq_seg0_idx -= 8;
2611 vht_oper->center_freq_seg0_idx += 8;
2613 case NL80211_CHAN_WIDTH_80P80:
2615 * Convert 80+80 MHz channel width to new style as interop
2618 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2620 case NL80211_CHAN_WIDTH_80:
2621 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2624 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2628 /* don't require special VHT peer rates */
2629 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2631 return pos + sizeof(struct ieee80211_vht_operation);
2634 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2635 struct cfg80211_chan_def *chandef)
2637 enum nl80211_channel_type channel_type;
2642 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2643 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2644 channel_type = NL80211_CHAN_HT20;
2646 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2647 channel_type = NL80211_CHAN_HT40PLUS;
2649 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2650 channel_type = NL80211_CHAN_HT40MINUS;
2653 channel_type = NL80211_CHAN_NO_HT;
2657 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2661 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2662 struct cfg80211_chan_def *chandef)
2664 struct cfg80211_chan_def new = *chandef;
2670 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2671 chandef->chan->band);
2672 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2673 chandef->chan->band);
2675 switch (oper->chan_width) {
2676 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2678 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2679 new.width = NL80211_CHAN_WIDTH_80;
2680 new.center_freq1 = cf1;
2681 /* If needed, adjust based on the newer interop workaround. */
2682 if (oper->center_freq_seg1_idx) {
2685 diff = abs(oper->center_freq_seg1_idx -
2686 oper->center_freq_seg0_idx);
2688 new.width = NL80211_CHAN_WIDTH_160;
2689 new.center_freq1 = cf2;
2690 } else if (diff > 8) {
2691 new.width = NL80211_CHAN_WIDTH_80P80;
2692 new.center_freq2 = cf2;
2696 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2697 new.width = NL80211_CHAN_WIDTH_160;
2698 new.center_freq1 = cf1;
2700 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2701 new.width = NL80211_CHAN_WIDTH_80P80;
2702 new.center_freq1 = cf1;
2703 new.center_freq2 = cf2;
2709 if (!cfg80211_chandef_valid(&new))
2716 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2717 const struct ieee80211_supported_band *sband,
2718 const u8 *srates, int srates_len, u32 *rates)
2720 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2721 int shift = ieee80211_chandef_get_shift(chandef);
2722 struct ieee80211_rate *br;
2723 int brate, rate, i, j, count = 0;
2727 for (i = 0; i < srates_len; i++) {
2728 rate = srates[i] & 0x7f;
2730 for (j = 0; j < sband->n_bitrates; j++) {
2731 br = &sband->bitrates[j];
2732 if ((rate_flags & br->flags) != rate_flags)
2735 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2736 if (brate == rate) {
2746 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2747 struct sk_buff *skb, bool need_basic,
2748 enum nl80211_band band)
2750 struct ieee80211_local *local = sdata->local;
2751 struct ieee80211_supported_band *sband;
2754 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2757 shift = ieee80211_vif_get_shift(&sdata->vif);
2758 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2759 sband = local->hw.wiphy->bands[band];
2761 for (i = 0; i < sband->n_bitrates; i++) {
2762 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2769 if (skb_tailroom(skb) < rates + 2)
2772 pos = skb_put(skb, rates + 2);
2773 *pos++ = WLAN_EID_SUPP_RATES;
2775 for (i = 0; i < rates; i++) {
2777 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2780 if (need_basic && basic_rates & BIT(i))
2782 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2784 *pos++ = basic | (u8) rate;
2790 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2791 struct sk_buff *skb, bool need_basic,
2792 enum nl80211_band band)
2794 struct ieee80211_local *local = sdata->local;
2795 struct ieee80211_supported_band *sband;
2797 u8 i, exrates, *pos;
2798 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2801 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2802 shift = ieee80211_vif_get_shift(&sdata->vif);
2804 sband = local->hw.wiphy->bands[band];
2806 for (i = 0; i < sband->n_bitrates; i++) {
2807 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2817 if (skb_tailroom(skb) < exrates + 2)
2821 pos = skb_put(skb, exrates + 2);
2822 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2824 for (i = 8; i < sband->n_bitrates; i++) {
2826 if ((rate_flags & sband->bitrates[i].flags)
2829 if (need_basic && basic_rates & BIT(i))
2831 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2833 *pos++ = basic | (u8) rate;
2839 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2841 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2842 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2844 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2845 /* non-managed type inferfaces */
2848 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2850 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2852 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2857 /* TODO: consider rx_highest */
2859 if (mcs->rx_mask[3])
2861 if (mcs->rx_mask[2])
2863 if (mcs->rx_mask[1])
2869 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2870 * @local: mac80211 hw info struct
2871 * @status: RX status
2872 * @mpdu_len: total MPDU length (including FCS)
2873 * @mpdu_offset: offset into MPDU to calculate timestamp at
2875 * This function calculates the RX timestamp at the given MPDU offset, taking
2876 * into account what the RX timestamp was. An offset of 0 will just normalize
2877 * the timestamp to TSF at beginning of MPDU reception.
2879 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2880 struct ieee80211_rx_status *status,
2881 unsigned int mpdu_len,
2882 unsigned int mpdu_offset)
2884 u64 ts = status->mactime;
2885 struct rate_info ri;
2888 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2891 memset(&ri, 0, sizeof(ri));
2895 /* Fill cfg80211 rate info */
2896 switch (status->encoding) {
2898 ri.mcs = status->rate_idx;
2899 ri.flags |= RATE_INFO_FLAGS_MCS;
2900 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2901 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2904 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2905 ri.mcs = status->rate_idx;
2906 ri.nss = status->nss;
2907 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2908 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2913 case RX_ENC_LEGACY: {
2914 struct ieee80211_supported_band *sband;
2918 switch (status->bw) {
2919 case RATE_INFO_BW_10:
2922 case RATE_INFO_BW_5:
2927 sband = local->hw.wiphy->bands[status->band];
2928 bitrate = sband->bitrates[status->rate_idx].bitrate;
2929 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2931 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2932 /* TODO: handle HT/VHT preambles */
2933 if (status->band == NL80211_BAND_5GHZ) {
2936 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2946 rate = cfg80211_calculate_bitrate(&ri);
2947 if (WARN_ONCE(!rate,
2948 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2949 (unsigned long long)status->flag, status->rate_idx,
2953 /* rewind from end of MPDU */
2954 if (status->flag & RX_FLAG_MACTIME_END)
2955 ts -= mpdu_len * 8 * 10 / rate;
2957 ts += mpdu_offset * 8 * 10 / rate;
2962 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2964 struct ieee80211_sub_if_data *sdata;
2965 struct cfg80211_chan_def chandef;
2967 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2970 mutex_lock(&local->mtx);
2971 list_for_each_entry(sdata, &local->interfaces, list) {
2972 /* it might be waiting for the local->mtx, but then
2973 * by the time it gets it, sdata->wdev.cac_started
2974 * will no longer be true
2976 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2978 if (sdata->wdev.cac_started) {
2979 chandef = sdata->vif.bss_conf.chandef;
2980 ieee80211_vif_release_channel(sdata);
2981 cfg80211_cac_event(sdata->dev,
2983 NL80211_RADAR_CAC_ABORTED,
2987 mutex_unlock(&local->mtx);
2990 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2992 struct ieee80211_local *local =
2993 container_of(work, struct ieee80211_local, radar_detected_work);
2994 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2995 struct ieee80211_chanctx *ctx;
2996 int num_chanctx = 0;
2998 mutex_lock(&local->chanctx_mtx);
2999 list_for_each_entry(ctx, &local->chanctx_list, list) {
3000 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3004 chandef = ctx->conf.def;
3006 mutex_unlock(&local->chanctx_mtx);
3009 ieee80211_dfs_cac_cancel(local);
3012 if (num_chanctx > 1)
3013 /* XXX: multi-channel is not supported yet */
3016 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3019 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3021 struct ieee80211_local *local = hw_to_local(hw);
3023 trace_api_radar_detected(local);
3025 schedule_work(&local->radar_detected_work);
3027 EXPORT_SYMBOL(ieee80211_radar_detected);
3029 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3035 case NL80211_CHAN_WIDTH_20:
3036 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3037 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3039 case NL80211_CHAN_WIDTH_40:
3040 c->width = NL80211_CHAN_WIDTH_20;
3041 c->center_freq1 = c->chan->center_freq;
3042 ret = IEEE80211_STA_DISABLE_40MHZ |
3043 IEEE80211_STA_DISABLE_VHT;
3045 case NL80211_CHAN_WIDTH_80:
3046 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3050 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3051 c->width = NL80211_CHAN_WIDTH_40;
3052 ret = IEEE80211_STA_DISABLE_VHT;
3054 case NL80211_CHAN_WIDTH_80P80:
3055 c->center_freq2 = 0;
3056 c->width = NL80211_CHAN_WIDTH_80;
3057 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3058 IEEE80211_STA_DISABLE_160MHZ;
3060 case NL80211_CHAN_WIDTH_160:
3062 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3065 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3066 c->width = NL80211_CHAN_WIDTH_80;
3067 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3068 IEEE80211_STA_DISABLE_160MHZ;
3071 case NL80211_CHAN_WIDTH_20_NOHT:
3073 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3074 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3076 case NL80211_CHAN_WIDTH_5:
3077 case NL80211_CHAN_WIDTH_10:
3080 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3084 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3090 * Returns true if smps_mode_new is strictly more restrictive than
3093 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3094 enum ieee80211_smps_mode smps_mode_new)
3096 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3097 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3100 switch (smps_mode_old) {
3101 case IEEE80211_SMPS_STATIC:
3103 case IEEE80211_SMPS_DYNAMIC:
3104 return smps_mode_new == IEEE80211_SMPS_STATIC;
3105 case IEEE80211_SMPS_OFF:
3106 return smps_mode_new != IEEE80211_SMPS_OFF;
3114 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3115 struct cfg80211_csa_settings *csa_settings)
3117 struct sk_buff *skb;
3118 struct ieee80211_mgmt *mgmt;
3119 struct ieee80211_local *local = sdata->local;
3121 int hdr_len = offsetofend(struct ieee80211_mgmt,
3122 u.action.u.chan_switch);
3125 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3126 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3129 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3130 5 + /* channel switch announcement element */
3131 3 + /* secondary channel offset element */
3132 5 + /* wide bandwidth channel switch announcement */
3133 8); /* mesh channel switch parameters element */
3137 skb_reserve(skb, local->tx_headroom);
3138 mgmt = skb_put_zero(skb, hdr_len);
3139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3140 IEEE80211_STYPE_ACTION);
3142 eth_broadcast_addr(mgmt->da);
3143 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3144 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3145 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3147 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3148 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3150 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3151 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3152 pos = skb_put(skb, 5);
3153 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3154 *pos++ = 3; /* IE length */
3155 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3156 freq = csa_settings->chandef.chan->center_freq;
3157 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3158 *pos++ = csa_settings->count; /* count */
3160 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3161 enum nl80211_channel_type ch_type;
3164 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3165 *pos++ = 1; /* IE length */
3166 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3167 if (ch_type == NL80211_CHAN_HT40PLUS)
3168 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3170 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3173 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3174 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3177 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3178 *pos++ = 6; /* IE length */
3179 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3180 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3181 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3182 *pos++ |= csa_settings->block_tx ?
3183 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3184 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3186 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3190 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3191 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3192 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3194 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3197 ieee80211_tx_skb(sdata, skb);
3201 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3203 return !(cs == NULL || cs->cipher == 0 ||
3204 cs->hdr_len < cs->pn_len + cs->pn_off ||
3205 cs->hdr_len <= cs->key_idx_off ||
3206 cs->key_idx_shift > 7 ||
3207 cs->key_idx_mask == 0);
3210 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3214 /* Ensure we have enough iftype bitmap space for all iftype values */
3215 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3217 for (i = 0; i < n; i++)
3218 if (!ieee80211_cs_valid(&cs[i]))
3224 const struct ieee80211_cipher_scheme *
3225 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3226 enum nl80211_iftype iftype)
3228 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3229 int n = local->hw.n_cipher_schemes;
3231 const struct ieee80211_cipher_scheme *cs = NULL;
3233 for (i = 0; i < n; i++) {
3234 if (l[i].cipher == cipher) {
3240 if (!cs || !(cs->iftype & BIT(iftype)))
3246 int ieee80211_cs_headroom(struct ieee80211_local *local,
3247 struct cfg80211_crypto_settings *crypto,
3248 enum nl80211_iftype iftype)
3250 const struct ieee80211_cipher_scheme *cs;
3251 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3254 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3255 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3258 if (cs && headroom < cs->hdr_len)
3259 headroom = cs->hdr_len;
3262 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3263 if (cs && headroom < cs->hdr_len)
3264 headroom = cs->hdr_len;
3270 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3272 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3279 if (data->count[i] == 1)
3282 if (data->desc[i].interval == 0)
3285 /* End time is in the past, check for repetitions */
3286 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3287 if (data->count[i] < 255) {
3288 if (data->count[i] <= skip) {
3293 data->count[i] -= skip;
3296 data->desc[i].start += skip * data->desc[i].interval;
3302 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3308 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3311 if (!data->count[i])
3314 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3317 cur = data->desc[i].start - tsf;
3321 cur = data->desc[i].start + data->desc[i].duration - tsf;
3330 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3335 * arbitrary limit, used to avoid infinite loops when combined NoA
3336 * descriptors cover the full time period.
3340 ieee80211_extend_absent_time(data, tsf, &offset);
3342 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3346 } while (tries < max_tries);
3351 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3353 u32 next_offset = BIT(31) - 1;
3357 data->has_next_tsf = false;
3358 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3361 if (!data->count[i])
3364 ieee80211_extend_noa_desc(data, tsf, i);
3365 start = data->desc[i].start - tsf;
3367 data->absent |= BIT(i);
3369 if (next_offset > start)
3370 next_offset = start;
3372 data->has_next_tsf = true;
3376 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3378 data->next_tsf = tsf + next_offset;
3380 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3382 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3383 struct ieee80211_noa_data *data, u32 tsf)
3388 memset(data, 0, sizeof(*data));
3390 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3391 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3393 if (!desc->count || !desc->duration)
3396 data->count[i] = desc->count;
3397 data->desc[i].start = le32_to_cpu(desc->start_time);
3398 data->desc[i].duration = le32_to_cpu(desc->duration);
3399 data->desc[i].interval = le32_to_cpu(desc->interval);
3401 if (data->count[i] > 1 &&
3402 data->desc[i].interval < data->desc[i].duration)
3405 ieee80211_extend_noa_desc(data, tsf, i);
3410 ieee80211_update_p2p_noa(data, tsf);
3414 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3416 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3417 struct ieee80211_sub_if_data *sdata)
3419 u64 tsf = drv_get_tsf(local, sdata);
3421 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3422 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3426 if (tsf == -1ULL || !beacon_int || !dtim_period)
3429 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3430 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3434 ps = &sdata->bss->ps;
3435 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3436 ps = &sdata->u.mesh.ps;
3442 * actually finds last dtim_count, mac80211 will update in
3443 * __beacon_add_tim().
3444 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3446 do_div(tsf, beacon_int);
3447 bcns_from_dtim = do_div(tsf, dtim_period);
3448 /* just had a DTIM */
3449 if (!bcns_from_dtim)
3452 dtim_count = dtim_period - bcns_from_dtim;
3454 ps->dtim_count = dtim_count;
3457 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3458 struct ieee80211_chanctx *ctx)
3460 struct ieee80211_sub_if_data *sdata;
3461 u8 radar_detect = 0;
3463 lockdep_assert_held(&local->chanctx_mtx);
3465 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3468 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3469 if (sdata->reserved_radar_required)
3470 radar_detect |= BIT(sdata->reserved_chandef.width);
3473 * An in-place reservation context should not have any assigned vifs
3474 * until it replaces the other context.
3476 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3477 !list_empty(&ctx->assigned_vifs));
3479 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3480 if (sdata->radar_required)
3481 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3483 return radar_detect;
3486 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3487 const struct cfg80211_chan_def *chandef,
3488 enum ieee80211_chanctx_mode chanmode,
3491 struct ieee80211_local *local = sdata->local;
3492 struct ieee80211_sub_if_data *sdata_iter;
3493 enum nl80211_iftype iftype = sdata->wdev.iftype;
3494 struct ieee80211_chanctx *ctx;
3496 struct iface_combination_params params = {
3497 .radar_detect = radar_detect,
3500 lockdep_assert_held(&local->chanctx_mtx);
3502 if (WARN_ON(hweight32(radar_detect) > 1))
3505 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3509 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3512 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3513 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3515 * always passing this is harmless, since it'll be the
3516 * same value that cfg80211 finds if it finds the same
3517 * interface ... and that's always allowed
3519 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3522 /* Always allow software iftypes */
3523 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3530 params.num_different_channels = 1;
3532 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3533 params.iftype_num[iftype] = 1;
3535 list_for_each_entry(ctx, &local->chanctx_list, list) {
3536 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3538 params.radar_detect |=
3539 ieee80211_chanctx_radar_detect(local, ctx);
3540 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3541 params.num_different_channels++;
3544 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3545 cfg80211_chandef_compatible(chandef,
3548 params.num_different_channels++;
3551 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3552 struct wireless_dev *wdev_iter;
3554 wdev_iter = &sdata_iter->wdev;
3556 if (sdata_iter == sdata ||
3557 !ieee80211_sdata_running(sdata_iter) ||
3558 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3561 params.iftype_num[wdev_iter->iftype]++;
3565 if (total == 1 && !params.radar_detect)
3568 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3572 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3575 u32 *max_num_different_channels = data;
3577 *max_num_different_channels = max(*max_num_different_channels,
3578 c->num_different_channels);
3581 int ieee80211_max_num_channels(struct ieee80211_local *local)
3583 struct ieee80211_sub_if_data *sdata;
3584 struct ieee80211_chanctx *ctx;
3585 u32 max_num_different_channels = 1;
3587 struct iface_combination_params params = {0};
3589 lockdep_assert_held(&local->chanctx_mtx);
3591 list_for_each_entry(ctx, &local->chanctx_list, list) {
3592 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3595 params.num_different_channels++;
3597 params.radar_detect |=
3598 ieee80211_chanctx_radar_detect(local, ctx);
3601 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3602 params.iftype_num[sdata->wdev.iftype]++;
3604 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3605 ieee80211_iter_max_chans,
3606 &max_num_different_channels);
3610 return max_num_different_channels;
3613 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3615 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3616 *buf++ = 7; /* len */
3617 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3620 *buf++ = 2; /* WME */
3621 *buf++ = 0; /* WME info */
3622 *buf++ = 1; /* WME ver */
3623 *buf++ = qosinfo; /* U-APSD no in use */
3628 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3629 unsigned long *frame_cnt,
3630 unsigned long *byte_cnt)
3632 struct txq_info *txqi = to_txq_info(txq);
3633 u32 frag_cnt = 0, frag_bytes = 0;
3634 struct sk_buff *skb;
3636 skb_queue_walk(&txqi->frags, skb) {
3638 frag_bytes += skb->len;
3642 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3645 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3647 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3649 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3650 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3651 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3652 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3653 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK