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) 2015-2016 Intel Deutschland GmbH
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * utilities for mac80211
16 #include <net/mac80211.h>
17 #include <linux/netdevice.h>
18 #include <linux/export.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/bitmap.h>
25 #include <linux/crc32.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/rtnetlink.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
38 /* privid for wiphys to determine whether they belong to us or not */
39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 struct ieee80211_local *local;
46 local = wiphy_priv(wiphy);
49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
54 struct ieee80211_hdr *hdr;
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
62 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
80 if (band == NL80211_BAND_5GHZ || erp) {
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
94 dur = 16; /* SIFS + signal ext */
95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 2 for 10 MHz
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate); /* T_SYM x N_SYM */
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 dur = 10; /* aSIFSTime = 10 usec */
121 dur += short_preamble ? (72 + 24) : (144 + 48);
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
129 /* Exported duration function for driver use */
130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum nl80211_band band,
134 struct ieee80211_rate *rate)
136 struct ieee80211_sub_if_data *sdata;
139 bool short_preamble = false;
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
153 return cpu_to_le16(dur);
155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
165 int erp, shift = 0, bitrate;
167 struct ieee80211_supported_band *sband;
169 sband = local->hw.wiphy->bands[frame_txctl->band];
171 short_preamble = false;
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189 /* Data frame duration */
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
196 return cpu_to_le16(dur);
198 EXPORT_SYMBOL(ieee80211_rts_duration);
200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
203 const struct ieee80211_tx_info *frame_txctl)
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
209 int erp, shift = 0, bitrate;
211 struct ieee80211_supported_band *sband;
213 sband = local->hw.wiphy->bands[frame_txctl->band];
215 short_preamble = false;
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229 /* Data frame duration */
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
238 return cpu_to_le16(dur);
240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
247 if (local->ops->wake_tx_queue)
250 if (local->hw.queues < IEEE80211_NUM_ACS)
253 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
259 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
260 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
263 for (ac = 0; ac < n_acs; ac++) {
264 int ac_queue = sdata->vif.hw_queue[ac];
266 if (ac_queue == queue ||
267 (sdata->vif.cab_queue == queue &&
268 local->queue_stop_reasons[ac_queue] == 0 &&
269 skb_queue_empty(&local->pending[ac_queue])))
270 netif_wake_subqueue(sdata->dev, ac);
275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
276 enum queue_stop_reason reason,
279 struct ieee80211_local *local = hw_to_local(hw);
281 trace_wake_queue(local, queue, reason);
283 if (WARN_ON(queue >= hw->queues))
286 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
290 local->q_stop_reasons[queue][reason] = 0;
292 local->q_stop_reasons[queue][reason]--;
293 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
294 local->q_stop_reasons[queue][reason] = 0;
297 if (local->q_stop_reasons[queue][reason] == 0)
298 __clear_bit(reason, &local->queue_stop_reasons[queue]);
300 if (local->queue_stop_reasons[queue] != 0)
301 /* someone still has this queue stopped */
304 if (skb_queue_empty(&local->pending[queue])) {
306 ieee80211_propagate_queue_wake(local, queue);
309 tasklet_schedule(&local->tx_pending_tasklet);
312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
313 enum queue_stop_reason reason,
316 struct ieee80211_local *local = hw_to_local(hw);
319 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
320 __ieee80211_wake_queue(hw, queue, reason, refcounted);
321 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
326 ieee80211_wake_queue_by_reason(hw, queue,
327 IEEE80211_QUEUE_STOP_REASON_DRIVER,
330 EXPORT_SYMBOL(ieee80211_wake_queue);
332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
333 enum queue_stop_reason reason,
336 struct ieee80211_local *local = hw_to_local(hw);
337 struct ieee80211_sub_if_data *sdata;
338 int n_acs = IEEE80211_NUM_ACS;
340 trace_stop_queue(local, queue, reason);
342 if (WARN_ON(queue >= hw->queues))
346 local->q_stop_reasons[queue][reason] = 1;
348 local->q_stop_reasons[queue][reason]++;
350 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
353 if (local->ops->wake_tx_queue)
356 if (local->hw.queues < IEEE80211_NUM_ACS)
360 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
366 for (ac = 0; ac < n_acs; ac++) {
367 if (sdata->vif.hw_queue[ac] == queue ||
368 sdata->vif.cab_queue == queue)
369 netif_stop_subqueue(sdata->dev, ac);
375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
376 enum queue_stop_reason reason,
379 struct ieee80211_local *local = hw_to_local(hw);
382 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
383 __ieee80211_stop_queue(hw, queue, reason, refcounted);
384 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
389 ieee80211_stop_queue_by_reason(hw, queue,
390 IEEE80211_QUEUE_STOP_REASON_DRIVER,
393 EXPORT_SYMBOL(ieee80211_stop_queue);
395 void ieee80211_add_pending_skb(struct ieee80211_local *local,
398 struct ieee80211_hw *hw = &local->hw;
400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
401 int queue = info->hw_queue;
403 if (WARN_ON(!info->control.vif)) {
404 ieee80211_free_txskb(&local->hw, skb);
408 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
409 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
411 __skb_queue_tail(&local->pending[queue], skb);
412 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
414 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
417 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
418 struct sk_buff_head *skbs)
420 struct ieee80211_hw *hw = &local->hw;
425 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
426 while ((skb = skb_dequeue(skbs))) {
427 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
429 if (WARN_ON(!info->control.vif)) {
430 ieee80211_free_txskb(&local->hw, skb);
434 queue = info->hw_queue;
436 __ieee80211_stop_queue(hw, queue,
437 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
440 __skb_queue_tail(&local->pending[queue], skb);
443 for (i = 0; i < hw->queues; i++)
444 __ieee80211_wake_queue(hw, i,
445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
447 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
451 unsigned long queues,
452 enum queue_stop_reason reason,
455 struct ieee80211_local *local = hw_to_local(hw);
459 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461 for_each_set_bit(i, &queues, hw->queues)
462 __ieee80211_stop_queue(hw, i, reason, refcounted);
464 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
467 void ieee80211_stop_queues(struct ieee80211_hw *hw)
469 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
470 IEEE80211_QUEUE_STOP_REASON_DRIVER,
473 EXPORT_SYMBOL(ieee80211_stop_queues);
475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
477 struct ieee80211_local *local = hw_to_local(hw);
481 if (WARN_ON(queue >= hw->queues))
484 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
485 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
486 &local->queue_stop_reasons[queue]);
487 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
490 EXPORT_SYMBOL(ieee80211_queue_stopped);
492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
493 unsigned long queues,
494 enum queue_stop_reason reason,
497 struct ieee80211_local *local = hw_to_local(hw);
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
503 for_each_set_bit(i, &queues, hw->queues)
504 __ieee80211_wake_queue(hw, i, reason, refcounted);
506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509 void ieee80211_wake_queues(struct ieee80211_hw *hw)
511 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
512 IEEE80211_QUEUE_STOP_REASON_DRIVER,
515 EXPORT_SYMBOL(ieee80211_wake_queues);
518 ieee80211_get_vif_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
523 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
528 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
529 queues |= BIT(sdata->vif.hw_queue[ac]);
530 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
531 queues |= BIT(sdata->vif.cab_queue);
534 queues = BIT(local->hw.queues) - 1;
540 void __ieee80211_flush_queues(struct ieee80211_local *local,
541 struct ieee80211_sub_if_data *sdata,
542 unsigned int queues, bool drop)
544 if (!local->ops->flush)
548 * If no queue was set, or if the HW doesn't support
549 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
551 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
552 queues = ieee80211_get_vif_queues(local, sdata);
554 ieee80211_stop_queues_by_reason(&local->hw, queues,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH,
558 drv_flush(local, sdata, queues, drop);
560 ieee80211_wake_queues_by_reason(&local->hw, queues,
561 IEEE80211_QUEUE_STOP_REASON_FLUSH,
565 void ieee80211_flush_queues(struct ieee80211_local *local,
566 struct ieee80211_sub_if_data *sdata, bool drop)
568 __ieee80211_flush_queues(local, sdata, 0, drop);
571 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
572 struct ieee80211_sub_if_data *sdata,
573 enum queue_stop_reason reason)
575 ieee80211_stop_queues_by_reason(&local->hw,
576 ieee80211_get_vif_queues(local, sdata),
580 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
581 struct ieee80211_sub_if_data *sdata,
582 enum queue_stop_reason reason)
584 ieee80211_wake_queues_by_reason(&local->hw,
585 ieee80211_get_vif_queues(local, sdata),
589 static void __iterate_interfaces(struct ieee80211_local *local,
591 void (*iterator)(void *data, u8 *mac,
592 struct ieee80211_vif *vif),
595 struct ieee80211_sub_if_data *sdata;
596 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
599 switch (sdata->vif.type) {
600 case NL80211_IFTYPE_MONITOR:
601 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
604 case NL80211_IFTYPE_AP_VLAN:
609 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
610 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
612 if (ieee80211_sdata_running(sdata) || !active_only)
613 iterator(data, sdata->vif.addr,
617 sdata = rcu_dereference_check(local->monitor_sdata,
618 lockdep_is_held(&local->iflist_mtx) ||
619 lockdep_rtnl_is_held());
621 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
622 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
623 iterator(data, sdata->vif.addr, &sdata->vif);
626 void ieee80211_iterate_interfaces(
627 struct ieee80211_hw *hw, u32 iter_flags,
628 void (*iterator)(void *data, u8 *mac,
629 struct ieee80211_vif *vif),
632 struct ieee80211_local *local = hw_to_local(hw);
634 mutex_lock(&local->iflist_mtx);
635 __iterate_interfaces(local, iter_flags, iterator, data);
636 mutex_unlock(&local->iflist_mtx);
638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
640 void ieee80211_iterate_active_interfaces_atomic(
641 struct ieee80211_hw *hw, u32 iter_flags,
642 void (*iterator)(void *data, u8 *mac,
643 struct ieee80211_vif *vif),
646 struct ieee80211_local *local = hw_to_local(hw);
649 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
655 void ieee80211_iterate_active_interfaces_rtnl(
656 struct ieee80211_hw *hw, u32 iter_flags,
657 void (*iterator)(void *data, u8 *mac,
658 struct ieee80211_vif *vif),
661 struct ieee80211_local *local = hw_to_local(hw);
665 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
670 static void __iterate_stations(struct ieee80211_local *local,
671 void (*iterator)(void *data,
672 struct ieee80211_sta *sta),
675 struct sta_info *sta;
677 list_for_each_entry_rcu(sta, &local->sta_list, list) {
681 iterator(data, &sta->sta);
685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
686 void (*iterator)(void *data,
687 struct ieee80211_sta *sta),
690 struct ieee80211_local *local = hw_to_local(hw);
693 __iterate_stations(local, iterator, data);
696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
700 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
702 if (!ieee80211_sdata_running(sdata) ||
703 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
711 struct ieee80211_sub_if_data *sdata;
716 sdata = vif_to_sdata(vif);
718 if (!ieee80211_sdata_running(sdata) ||
719 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
727 * Nothing should have been stuffed into the workqueue during
728 * the suspend->resume cycle. Since we can't check each caller
729 * of this function if we are already quiescing / suspended,
730 * check here and don't WARN since this can actually happen when
731 * the rx path (for example) is racing against __ieee80211_suspend
732 * and suspending / quiescing was set after the rx path checked
735 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
737 if (local->quiescing || (local->suspended && !local->resuming)) {
738 pr_warn("queueing ieee80211 work while going to suspend\n");
745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
747 struct ieee80211_local *local = hw_to_local(hw);
749 if (!ieee80211_can_queue_work(local))
752 queue_work(local->workqueue, work);
754 EXPORT_SYMBOL(ieee80211_queue_work);
756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
757 struct delayed_work *dwork,
760 struct ieee80211_local *local = hw_to_local(hw);
762 if (!ieee80211_can_queue_work(local))
765 queue_delayed_work(local->workqueue, dwork, delay);
767 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
770 struct ieee802_11_elems *elems,
774 const u8 *pos = start;
775 bool calc_crc = filter != 0;
776 DECLARE_BITMAP(seen_elems, 256);
779 bitmap_zero(seen_elems, 256);
780 memset(elems, 0, sizeof(*elems));
781 elems->ie_start = start;
782 elems->total_len = len;
786 bool elem_parse_failed;
793 elems->parse_error = true;
799 case WLAN_EID_SUPP_RATES:
800 case WLAN_EID_FH_PARAMS:
801 case WLAN_EID_DS_PARAMS:
802 case WLAN_EID_CF_PARAMS:
804 case WLAN_EID_IBSS_PARAMS:
805 case WLAN_EID_CHALLENGE:
807 case WLAN_EID_ERP_INFO:
808 case WLAN_EID_EXT_SUPP_RATES:
809 case WLAN_EID_HT_CAPABILITY:
810 case WLAN_EID_HT_OPERATION:
811 case WLAN_EID_VHT_CAPABILITY:
812 case WLAN_EID_VHT_OPERATION:
813 case WLAN_EID_MESH_ID:
814 case WLAN_EID_MESH_CONFIG:
815 case WLAN_EID_PEER_MGMT:
820 case WLAN_EID_CHANNEL_SWITCH:
821 case WLAN_EID_EXT_CHANSWITCH_ANN:
822 case WLAN_EID_COUNTRY:
823 case WLAN_EID_PWR_CONSTRAINT:
824 case WLAN_EID_TIMEOUT_INTERVAL:
825 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
826 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
827 case WLAN_EID_CHAN_SWITCH_PARAM:
828 case WLAN_EID_EXT_CAPABILITY:
829 case WLAN_EID_CHAN_SWITCH_TIMING:
830 case WLAN_EID_LINK_ID:
832 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
833 * that if the content gets bigger it might be needed more than once
835 if (test_bit(id, seen_elems)) {
836 elems->parse_error = true;
844 if (calc_crc && id < 64 && (filter & (1ULL << id)))
845 crc = crc32_be(crc, pos - 2, elen + 2);
847 elem_parse_failed = false;
850 case WLAN_EID_LINK_ID:
851 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
852 elem_parse_failed = true;
855 elems->lnk_id = (void *)(pos - 2);
857 case WLAN_EID_CHAN_SWITCH_TIMING:
858 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
859 elem_parse_failed = true;
862 elems->ch_sw_timing = (void *)pos;
864 case WLAN_EID_EXT_CAPABILITY:
865 elems->ext_capab = pos;
866 elems->ext_capab_len = elen;
870 elems->ssid_len = elen;
872 case WLAN_EID_SUPP_RATES:
873 elems->supp_rates = pos;
874 elems->supp_rates_len = elen;
876 case WLAN_EID_DS_PARAMS:
878 elems->ds_params = pos;
880 elem_parse_failed = true;
883 if (elen >= sizeof(struct ieee80211_tim_ie)) {
884 elems->tim = (void *)pos;
885 elems->tim_len = elen;
887 elem_parse_failed = true;
889 case WLAN_EID_CHALLENGE:
890 elems->challenge = pos;
891 elems->challenge_len = elen;
893 case WLAN_EID_VENDOR_SPECIFIC:
894 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
896 /* Microsoft OUI (00:50:F2) */
899 crc = crc32_be(crc, pos - 2, elen + 2);
901 if (elen >= 5 && pos[3] == 2) {
902 /* OUI Type 2 - WMM IE */
904 elems->wmm_info = pos;
905 elems->wmm_info_len = elen;
906 } else if (pos[4] == 1) {
907 elems->wmm_param = pos;
908 elems->wmm_param_len = elen;
915 elems->rsn_len = elen;
917 case WLAN_EID_ERP_INFO:
919 elems->erp_info = pos;
921 elem_parse_failed = true;
923 case WLAN_EID_EXT_SUPP_RATES:
924 elems->ext_supp_rates = pos;
925 elems->ext_supp_rates_len = elen;
927 case WLAN_EID_HT_CAPABILITY:
928 if (elen >= sizeof(struct ieee80211_ht_cap))
929 elems->ht_cap_elem = (void *)pos;
931 elem_parse_failed = true;
933 case WLAN_EID_HT_OPERATION:
934 if (elen >= sizeof(struct ieee80211_ht_operation))
935 elems->ht_operation = (void *)pos;
937 elem_parse_failed = true;
939 case WLAN_EID_VHT_CAPABILITY:
940 if (elen >= sizeof(struct ieee80211_vht_cap))
941 elems->vht_cap_elem = (void *)pos;
943 elem_parse_failed = true;
945 case WLAN_EID_VHT_OPERATION:
946 if (elen >= sizeof(struct ieee80211_vht_operation)) {
947 elems->vht_operation = (void *)pos;
949 crc = crc32_be(crc, pos - 2, elen + 2);
952 elem_parse_failed = true;
954 case WLAN_EID_OPMODE_NOTIF:
956 elems->opmode_notif = pos;
958 crc = crc32_be(crc, pos - 2, elen + 2);
961 elem_parse_failed = true;
963 case WLAN_EID_MESH_ID:
964 elems->mesh_id = pos;
965 elems->mesh_id_len = elen;
967 case WLAN_EID_MESH_CONFIG:
968 if (elen >= sizeof(struct ieee80211_meshconf_ie))
969 elems->mesh_config = (void *)pos;
971 elem_parse_failed = true;
973 case WLAN_EID_PEER_MGMT:
974 elems->peering = pos;
975 elems->peering_len = elen;
977 case WLAN_EID_MESH_AWAKE_WINDOW:
979 elems->awake_window = (void *)pos;
983 elems->preq_len = elen;
987 elems->prep_len = elen;
991 elems->perr_len = elen;
994 if (elen >= sizeof(struct ieee80211_rann_ie))
995 elems->rann = (void *)pos;
997 elem_parse_failed = true;
999 case WLAN_EID_CHANNEL_SWITCH:
1000 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1001 elem_parse_failed = true;
1004 elems->ch_switch_ie = (void *)pos;
1006 case WLAN_EID_EXT_CHANSWITCH_ANN:
1007 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1008 elem_parse_failed = true;
1011 elems->ext_chansw_ie = (void *)pos;
1013 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1014 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1015 elem_parse_failed = true;
1018 elems->sec_chan_offs = (void *)pos;
1020 case WLAN_EID_CHAN_SWITCH_PARAM:
1022 sizeof(*elems->mesh_chansw_params_ie)) {
1023 elem_parse_failed = true;
1026 elems->mesh_chansw_params_ie = (void *)pos;
1028 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1030 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1031 elem_parse_failed = true;
1034 elems->wide_bw_chansw_ie = (void *)pos;
1036 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1038 elem_parse_failed = true;
1042 * This is a bit tricky, but as we only care about
1043 * the wide bandwidth channel switch element, so
1044 * just parse it out manually.
1046 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1049 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1050 elems->wide_bw_chansw_ie =
1053 elem_parse_failed = true;
1056 case WLAN_EID_COUNTRY:
1057 elems->country_elem = pos;
1058 elems->country_elem_len = elen;
1060 case WLAN_EID_PWR_CONSTRAINT:
1062 elem_parse_failed = true;
1065 elems->pwr_constr_elem = pos;
1067 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1068 /* Lots of different options exist, but we only care
1069 * about the Dynamic Transmit Power Control element.
1070 * First check for the Cisco OUI, then for the DTPC
1074 elem_parse_failed = true;
1078 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1079 pos[2] != 0x96 || pos[3] != 0x00)
1083 elem_parse_failed = true;
1088 crc = crc32_be(crc, pos - 2, elen + 2);
1090 elems->cisco_dtpc_elem = pos;
1092 case WLAN_EID_TIMEOUT_INTERVAL:
1093 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1094 elems->timeout_int = (void *)pos;
1096 elem_parse_failed = true;
1102 if (elem_parse_failed)
1103 elems->parse_error = true;
1105 __set_bit(id, seen_elems);
1112 elems->parse_error = true;
1117 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1118 bool bss_notify, bool enable_qos)
1120 struct ieee80211_local *local = sdata->local;
1121 struct ieee80211_tx_queue_params qparam;
1122 struct ieee80211_chanctx_conf *chanctx_conf;
1125 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1128 if (!local->ops->conf_tx)
1131 if (local->hw.queues < IEEE80211_NUM_ACS)
1134 memset(&qparam, 0, sizeof(qparam));
1137 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1138 use_11b = (chanctx_conf &&
1139 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1140 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1143 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1145 /* Set defaults according to 802.11-2007 Table 7-37 */
1152 /* Confiure old 802.11b/g medium access rules. */
1153 qparam.cw_max = aCWmax;
1154 qparam.cw_min = aCWmin;
1158 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1159 /* Update if QoS is enabled. */
1162 case IEEE80211_AC_BK:
1163 qparam.cw_max = aCWmax;
1164 qparam.cw_min = aCWmin;
1171 /* never happens but let's not leave undefined */
1173 case IEEE80211_AC_BE:
1174 qparam.cw_max = aCWmax;
1175 qparam.cw_min = aCWmin;
1182 case IEEE80211_AC_VI:
1183 qparam.cw_max = aCWmin;
1184 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1188 qparam.txop = 6016/32;
1190 qparam.txop = 3008/32;
1197 case IEEE80211_AC_VO:
1198 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1199 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1203 qparam.txop = 3264/32;
1205 qparam.txop = 1504/32;
1211 qparam.uapsd = false;
1213 sdata->tx_conf[ac] = qparam;
1214 drv_conf_tx(local, sdata, ac, &qparam);
1217 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1218 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1219 sdata->vif.type != NL80211_IFTYPE_NAN) {
1220 sdata->vif.bss_conf.qos = enable_qos;
1222 ieee80211_bss_info_change_notify(sdata,
1227 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1228 u16 transaction, u16 auth_alg, u16 status,
1229 const u8 *extra, size_t extra_len, const u8 *da,
1230 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1233 struct ieee80211_local *local = sdata->local;
1234 struct sk_buff *skb;
1235 struct ieee80211_mgmt *mgmt;
1238 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1239 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1240 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1244 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1246 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1247 memset(mgmt, 0, 24 + 6);
1248 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1249 IEEE80211_STYPE_AUTH);
1250 memcpy(mgmt->da, da, ETH_ALEN);
1251 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1252 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1253 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1254 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1255 mgmt->u.auth.status_code = cpu_to_le16(status);
1257 memcpy(skb_put(skb, extra_len), extra, extra_len);
1259 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1260 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1261 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1265 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1267 ieee80211_tx_skb(sdata, skb);
1270 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1271 const u8 *bssid, u16 stype, u16 reason,
1272 bool send_frame, u8 *frame_buf)
1274 struct ieee80211_local *local = sdata->local;
1275 struct sk_buff *skb;
1276 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1279 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1280 mgmt->duration = 0; /* initialize only */
1281 mgmt->seq_ctrl = 0; /* initialize only */
1282 memcpy(mgmt->da, bssid, ETH_ALEN);
1283 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1284 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1285 /* u.deauth.reason_code == u.disassoc.reason_code */
1286 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1289 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1290 IEEE80211_DEAUTH_FRAME_LEN);
1294 skb_reserve(skb, local->hw.extra_tx_headroom);
1297 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1298 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1300 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1301 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1302 IEEE80211_SKB_CB(skb)->flags |=
1303 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1305 ieee80211_tx_skb(sdata, skb);
1309 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1310 u8 *buffer, size_t buffer_len,
1311 const u8 *ie, size_t ie_len,
1312 enum nl80211_band band,
1314 struct cfg80211_chan_def *chandef,
1317 struct ieee80211_supported_band *sband;
1318 u8 *pos = buffer, *end = buffer + buffer_len;
1320 int supp_rates_len, i;
1326 bool have_80mhz = false;
1330 sband = local->hw.wiphy->bands[band];
1331 if (WARN_ON_ONCE(!sband))
1334 rate_flags = ieee80211_chandef_rate_flags(chandef);
1335 shift = ieee80211_chandef_get_shift(chandef);
1338 for (i = 0; i < sband->n_bitrates; i++) {
1339 if ((BIT(i) & rate_mask) == 0)
1340 continue; /* skip rate */
1341 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1344 rates[num_rates++] =
1345 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1349 supp_rates_len = min_t(int, num_rates, 8);
1351 if (end - pos < 2 + supp_rates_len)
1353 *pos++ = WLAN_EID_SUPP_RATES;
1354 *pos++ = supp_rates_len;
1355 memcpy(pos, rates, supp_rates_len);
1356 pos += supp_rates_len;
1358 /* insert "request information" if in custom IEs */
1360 static const u8 before_extrates[] = {
1362 WLAN_EID_SUPP_RATES,
1365 noffset = ieee80211_ie_split(ie, ie_len,
1367 ARRAY_SIZE(before_extrates),
1369 if (end - pos < noffset - *offset)
1371 memcpy(pos, ie + *offset, noffset - *offset);
1372 pos += noffset - *offset;
1376 ext_rates_len = num_rates - supp_rates_len;
1377 if (ext_rates_len > 0) {
1378 if (end - pos < 2 + ext_rates_len)
1380 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1381 *pos++ = ext_rates_len;
1382 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1383 pos += ext_rates_len;
1386 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1389 *pos++ = WLAN_EID_DS_PARAMS;
1391 *pos++ = ieee80211_frequency_to_channel(
1392 chandef->chan->center_freq);
1395 /* insert custom IEs that go before HT */
1397 static const u8 before_ht[] = {
1399 WLAN_EID_SUPP_RATES,
1401 WLAN_EID_EXT_SUPP_RATES,
1403 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1405 noffset = ieee80211_ie_split(ie, ie_len,
1406 before_ht, ARRAY_SIZE(before_ht),
1408 if (end - pos < noffset - *offset)
1410 memcpy(pos, ie + *offset, noffset - *offset);
1411 pos += noffset - *offset;
1415 if (sband->ht_cap.ht_supported) {
1416 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1418 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1423 * If adding more here, adjust code in main.c
1424 * that calculates local->scan_ies_len.
1427 /* insert custom IEs that go before VHT */
1429 static const u8 before_vht[] = {
1431 WLAN_EID_SUPP_RATES,
1433 WLAN_EID_EXT_SUPP_RATES,
1435 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1436 WLAN_EID_HT_CAPABILITY,
1437 WLAN_EID_BSS_COEX_2040,
1438 WLAN_EID_EXT_CAPABILITY,
1440 WLAN_EID_CHANNEL_USAGE,
1441 WLAN_EID_INTERWORKING,
1442 /* mesh ID can't happen here */
1443 /* 60 GHz can't happen here right now */
1445 noffset = ieee80211_ie_split(ie, ie_len,
1446 before_vht, ARRAY_SIZE(before_vht),
1448 if (end - pos < noffset - *offset)
1450 memcpy(pos, ie + *offset, noffset - *offset);
1451 pos += noffset - *offset;
1455 /* Check if any channel in this sband supports at least 80 MHz */
1456 for (i = 0; i < sband->n_channels; i++) {
1457 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1458 IEEE80211_CHAN_NO_80MHZ))
1465 if (sband->vht_cap.vht_supported && have_80mhz) {
1466 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1468 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1469 sband->vht_cap.cap);
1472 return pos - buffer;
1474 WARN_ONCE(1, "not enough space for preq IEs\n");
1475 return pos - buffer;
1478 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1480 struct ieee80211_scan_ies *ie_desc,
1481 const u8 *ie, size_t ie_len,
1482 u8 bands_used, u32 *rate_masks,
1483 struct cfg80211_chan_def *chandef)
1485 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1488 memset(ie_desc, 0, sizeof(*ie_desc));
1490 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1491 if (bands_used & BIT(i)) {
1492 pos += ieee80211_build_preq_ies_band(local,
1499 ie_desc->ies[i] = buffer + old_pos;
1500 ie_desc->len[i] = pos - old_pos;
1505 /* add any remaining custom IEs */
1507 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1508 "not enough space for preq custom IEs\n"))
1510 memcpy(buffer + pos, ie + custom_ie_offset,
1511 ie_len - custom_ie_offset);
1512 ie_desc->common_ies = buffer + pos;
1513 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1514 pos += ie_len - custom_ie_offset;
1520 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1521 const u8 *src, const u8 *dst,
1523 struct ieee80211_channel *chan,
1524 const u8 *ssid, size_t ssid_len,
1525 const u8 *ie, size_t ie_len,
1528 struct ieee80211_local *local = sdata->local;
1529 struct cfg80211_chan_def chandef;
1530 struct sk_buff *skb;
1531 struct ieee80211_mgmt *mgmt;
1533 u32 rate_masks[NUM_NL80211_BANDS] = {};
1534 struct ieee80211_scan_ies dummy_ie_desc;
1537 * Do not send DS Channel parameter for directed probe requests
1538 * in order to maximize the chance that we get a response. Some
1539 * badly-behaved APs don't respond when this parameter is included.
1541 chandef.width = sdata->vif.bss_conf.chandef.width;
1543 chandef.chan = NULL;
1545 chandef.chan = chan;
1547 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1552 rate_masks[chan->band] = ratemask;
1553 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1554 skb_tailroom(skb), &dummy_ie_desc,
1555 ie, ie_len, BIT(chan->band),
1556 rate_masks, &chandef);
1557 skb_put(skb, ies_len);
1560 mgmt = (struct ieee80211_mgmt *) skb->data;
1561 memcpy(mgmt->da, dst, ETH_ALEN);
1562 memcpy(mgmt->bssid, dst, ETH_ALEN);
1565 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1570 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1571 const u8 *src, const u8 *dst,
1572 const u8 *ssid, size_t ssid_len,
1573 const u8 *ie, size_t ie_len,
1574 u32 ratemask, bool directed, u32 tx_flags,
1575 struct ieee80211_channel *channel, bool scan)
1577 struct sk_buff *skb;
1579 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1581 ie, ie_len, directed);
1583 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1585 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1587 ieee80211_tx_skb(sdata, skb);
1591 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1592 struct ieee802_11_elems *elems,
1593 enum nl80211_band band, u32 *basic_rates)
1595 struct ieee80211_supported_band *sband;
1597 u32 supp_rates, rate_flags;
1600 sband = sdata->local->hw.wiphy->bands[band];
1601 if (WARN_ON(!sband))
1604 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1605 shift = ieee80211_vif_get_shift(&sdata->vif);
1607 num_rates = sband->n_bitrates;
1609 for (i = 0; i < elems->supp_rates_len +
1610 elems->ext_supp_rates_len; i++) {
1614 if (i < elems->supp_rates_len)
1615 rate = elems->supp_rates[i];
1616 else if (elems->ext_supp_rates)
1617 rate = elems->ext_supp_rates
1618 [i - elems->supp_rates_len];
1619 own_rate = 5 * (rate & 0x7f);
1620 is_basic = !!(rate & 0x80);
1622 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1625 for (j = 0; j < num_rates; j++) {
1627 if ((rate_flags & sband->bitrates[j].flags)
1631 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1634 if (brate == own_rate) {
1635 supp_rates |= BIT(j);
1636 if (basic_rates && is_basic)
1637 *basic_rates |= BIT(j);
1644 void ieee80211_stop_device(struct ieee80211_local *local)
1646 ieee80211_led_radio(local, false);
1647 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1649 cancel_work_sync(&local->reconfig_filter);
1651 flush_workqueue(local->workqueue);
1655 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1658 /* It's possible that we don't handle the scan completion in
1659 * time during suspend, so if it's still marked as completed
1660 * here, queue the work and flush it to clean things up.
1661 * Instead of calling the worker function directly here, we
1662 * really queue it to avoid potential races with other flows
1663 * scheduling the same work.
1665 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1666 /* If coming from reconfiguration failure, abort the scan so
1667 * we don't attempt to continue a partial HW scan - which is
1668 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1669 * completed scan, and a 5 GHz portion is still pending.
1672 set_bit(SCAN_ABORTED, &local->scanning);
1673 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1674 flush_delayed_work(&local->scan_work);
1678 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1680 struct ieee80211_sub_if_data *sdata;
1681 struct ieee80211_chanctx *ctx;
1684 * We get here if during resume the device can't be restarted properly.
1685 * We might also get here if this happens during HW reset, which is a
1686 * slightly different situation and we need to drop all connections in
1689 * Ask cfg80211 to turn off all interfaces, this will result in more
1690 * warnings but at least we'll then get into a clean stopped state.
1693 local->resuming = false;
1694 local->suspended = false;
1695 local->in_reconfig = false;
1697 ieee80211_flush_completed_scan(local, true);
1699 /* scheduled scan clearly can't be running any more, but tell
1700 * cfg80211 and clear local state
1702 ieee80211_sched_scan_end(local);
1704 list_for_each_entry(sdata, &local->interfaces, list)
1705 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1707 /* Mark channel contexts as not being in the driver any more to avoid
1708 * removing them from the driver during the shutdown process...
1710 mutex_lock(&local->chanctx_mtx);
1711 list_for_each_entry(ctx, &local->chanctx_list, list)
1712 ctx->driver_present = false;
1713 mutex_unlock(&local->chanctx_mtx);
1715 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1718 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1719 struct ieee80211_sub_if_data *sdata)
1721 struct ieee80211_chanctx_conf *conf;
1722 struct ieee80211_chanctx *ctx;
1724 if (!local->use_chanctx)
1727 mutex_lock(&local->chanctx_mtx);
1728 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1729 lockdep_is_held(&local->chanctx_mtx));
1731 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1732 drv_assign_vif_chanctx(local, sdata, ctx);
1734 mutex_unlock(&local->chanctx_mtx);
1737 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1739 struct ieee80211_local *local = sdata->local;
1740 struct sta_info *sta;
1743 mutex_lock(&local->sta_mtx);
1744 list_for_each_entry(sta, &local->sta_list, list) {
1745 enum ieee80211_sta_state state;
1747 if (!sta->uploaded || sta->sdata != sdata)
1750 for (state = IEEE80211_STA_NOTEXIST;
1751 state < sta->sta_state; state++)
1752 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1755 mutex_unlock(&local->sta_mtx);
1758 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1760 struct cfg80211_nan_func *func, **funcs;
1763 res = drv_start_nan(sdata->local, sdata,
1764 &sdata->u.nan.conf);
1768 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1769 sizeof(*funcs), GFP_KERNEL);
1773 /* Add all the functions:
1774 * This is a little bit ugly. We need to call a potentially sleeping
1775 * callback for each NAN function, so we can't hold the spinlock.
1777 spin_lock_bh(&sdata->u.nan.func_lock);
1779 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1782 spin_unlock_bh(&sdata->u.nan.func_lock);
1784 for (i = 0; funcs[i]; i++) {
1785 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1787 ieee80211_nan_func_terminated(&sdata->vif,
1788 funcs[i]->instance_id,
1789 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1798 int ieee80211_reconfig(struct ieee80211_local *local)
1800 struct ieee80211_hw *hw = &local->hw;
1801 struct ieee80211_sub_if_data *sdata;
1802 struct ieee80211_chanctx *ctx;
1803 struct sta_info *sta;
1805 bool reconfig_due_to_wowlan = false;
1806 struct ieee80211_sub_if_data *sched_scan_sdata;
1807 struct cfg80211_sched_scan_request *sched_scan_req;
1808 bool sched_scan_stopped = false;
1809 bool suspended = local->suspended;
1811 /* nothing to do if HW shouldn't run */
1812 if (!local->open_count)
1817 local->resuming = true;
1819 if (local->wowlan) {
1821 * In the wowlan case, both mac80211 and the device
1822 * are functional when the resume op is called, so
1823 * clear local->suspended so the device could operate
1824 * normally (e.g. pass rx frames).
1826 local->suspended = false;
1827 res = drv_resume(local);
1828 local->wowlan = false;
1830 local->resuming = false;
1837 * res is 1, which means the driver requested
1838 * to go through a regular reset on wakeup.
1839 * restore local->suspended in this case.
1841 reconfig_due_to_wowlan = true;
1842 local->suspended = true;
1847 * In case of hw_restart during suspend (without wowlan),
1848 * cancel restart work, as we are reconfiguring the device
1850 * Note that restart_work is scheduled on a frozen workqueue,
1851 * so we can't deadlock in this case.
1853 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1854 cancel_work_sync(&local->restart_work);
1856 local->started = false;
1859 * Upon resume hardware can sometimes be goofy due to
1860 * various platform / driver / bus issues, so restarting
1861 * the device may at times not work immediately. Propagate
1864 res = drv_start(local);
1867 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1869 WARN(1, "Hardware became unavailable during restart.\n");
1870 ieee80211_handle_reconfig_failure(local);
1874 /* setup fragmentation threshold */
1875 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1877 /* setup RTS threshold */
1878 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1880 /* reset coverage class */
1881 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1883 ieee80211_led_radio(local, true);
1884 ieee80211_mod_tpt_led_trig(local,
1885 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1887 /* add interfaces */
1888 sdata = rtnl_dereference(local->monitor_sdata);
1890 /* in HW restart it exists already */
1891 WARN_ON(local->resuming);
1892 res = drv_add_interface(local, sdata);
1894 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1900 list_for_each_entry(sdata, &local->interfaces, list) {
1901 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1902 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1903 ieee80211_sdata_running(sdata)) {
1904 res = drv_add_interface(local, sdata);
1910 /* If adding any of the interfaces failed above, roll back and
1914 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1916 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1917 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1918 ieee80211_sdata_running(sdata))
1919 drv_remove_interface(local, sdata);
1920 ieee80211_handle_reconfig_failure(local);
1924 /* add channel contexts */
1925 if (local->use_chanctx) {
1926 mutex_lock(&local->chanctx_mtx);
1927 list_for_each_entry(ctx, &local->chanctx_list, list)
1928 if (ctx->replace_state !=
1929 IEEE80211_CHANCTX_REPLACES_OTHER)
1930 WARN_ON(drv_add_chanctx(local, ctx));
1931 mutex_unlock(&local->chanctx_mtx);
1933 sdata = rtnl_dereference(local->monitor_sdata);
1934 if (sdata && ieee80211_sdata_running(sdata))
1935 ieee80211_assign_chanctx(local, sdata);
1938 /* reconfigure hardware */
1939 ieee80211_hw_config(local, ~0);
1941 ieee80211_configure_filter(local);
1943 /* Finally also reconfigure all the BSS information */
1944 list_for_each_entry(sdata, &local->interfaces, list) {
1947 if (!ieee80211_sdata_running(sdata))
1950 ieee80211_assign_chanctx(local, sdata);
1952 switch (sdata->vif.type) {
1953 case NL80211_IFTYPE_AP_VLAN:
1954 case NL80211_IFTYPE_MONITOR:
1957 ieee80211_reconfig_stations(sdata);
1959 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1960 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1961 drv_conf_tx(local, sdata, i,
1962 &sdata->tx_conf[i]);
1966 /* common change flags for all interface types */
1967 changed = BSS_CHANGED_ERP_CTS_PROT |
1968 BSS_CHANGED_ERP_PREAMBLE |
1969 BSS_CHANGED_ERP_SLOT |
1971 BSS_CHANGED_BASIC_RATES |
1972 BSS_CHANGED_BEACON_INT |
1977 BSS_CHANGED_TXPOWER;
1979 if (sdata->vif.mu_mimo_owner)
1980 changed |= BSS_CHANGED_MU_GROUPS;
1982 switch (sdata->vif.type) {
1983 case NL80211_IFTYPE_STATION:
1984 changed |= BSS_CHANGED_ASSOC |
1985 BSS_CHANGED_ARP_FILTER |
1988 /* Re-send beacon info report to the driver */
1989 if (sdata->u.mgd.have_beacon)
1990 changed |= BSS_CHANGED_BEACON_INFO;
1993 ieee80211_bss_info_change_notify(sdata, changed);
1994 sdata_unlock(sdata);
1996 case NL80211_IFTYPE_OCB:
1997 changed |= BSS_CHANGED_OCB;
1998 ieee80211_bss_info_change_notify(sdata, changed);
2000 case NL80211_IFTYPE_ADHOC:
2001 changed |= BSS_CHANGED_IBSS;
2003 case NL80211_IFTYPE_AP:
2004 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2006 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2007 changed |= BSS_CHANGED_AP_PROBE_RESP;
2009 if (rcu_access_pointer(sdata->u.ap.beacon))
2010 drv_start_ap(local, sdata);
2014 case NL80211_IFTYPE_MESH_POINT:
2015 if (sdata->vif.bss_conf.enable_beacon) {
2016 changed |= BSS_CHANGED_BEACON |
2017 BSS_CHANGED_BEACON_ENABLED;
2018 ieee80211_bss_info_change_notify(sdata, changed);
2021 case NL80211_IFTYPE_NAN:
2022 res = ieee80211_reconfig_nan(sdata);
2024 ieee80211_handle_reconfig_failure(local);
2028 case NL80211_IFTYPE_WDS:
2029 case NL80211_IFTYPE_AP_VLAN:
2030 case NL80211_IFTYPE_MONITOR:
2031 case NL80211_IFTYPE_P2P_DEVICE:
2034 case NL80211_IFTYPE_UNSPECIFIED:
2035 case NUM_NL80211_IFTYPES:
2036 case NL80211_IFTYPE_P2P_CLIENT:
2037 case NL80211_IFTYPE_P2P_GO:
2043 ieee80211_recalc_ps(local);
2046 * The sta might be in psm against the ap (e.g. because
2047 * this was the state before a hw restart), so we
2048 * explicitly send a null packet in order to make sure
2049 * it'll sync against the ap (and get out of psm).
2051 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2052 list_for_each_entry(sdata, &local->interfaces, list) {
2053 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2055 if (!sdata->u.mgd.associated)
2058 ieee80211_send_nullfunc(local, sdata, false);
2062 /* APs are now beaconing, add back stations */
2063 mutex_lock(&local->sta_mtx);
2064 list_for_each_entry(sta, &local->sta_list, list) {
2065 enum ieee80211_sta_state state;
2070 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2071 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2074 for (state = IEEE80211_STA_NOTEXIST;
2075 state < sta->sta_state; state++)
2076 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2079 mutex_unlock(&local->sta_mtx);
2082 list_for_each_entry(sdata, &local->interfaces, list)
2083 ieee80211_reset_crypto_tx_tailroom(sdata);
2085 list_for_each_entry(sdata, &local->interfaces, list)
2086 if (ieee80211_sdata_running(sdata))
2087 ieee80211_enable_keys(sdata);
2089 /* Reconfigure sched scan if it was interrupted by FW restart */
2090 mutex_lock(&local->mtx);
2091 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2092 lockdep_is_held(&local->mtx));
2093 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2094 lockdep_is_held(&local->mtx));
2095 if (sched_scan_sdata && sched_scan_req)
2097 * Sched scan stopped, but we don't want to report it. Instead,
2098 * we're trying to reschedule. However, if more than one scan
2099 * plan was set, we cannot reschedule since we don't know which
2100 * scan plan was currently running (and some scan plans may have
2101 * already finished).
2103 if (sched_scan_req->n_scan_plans > 1 ||
2104 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2106 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2107 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2108 sched_scan_stopped = true;
2110 mutex_unlock(&local->mtx);
2112 if (sched_scan_stopped)
2113 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2116 if (local->in_reconfig) {
2117 local->in_reconfig = false;
2120 /* Restart deferred ROCs */
2121 mutex_lock(&local->mtx);
2122 ieee80211_start_next_roc(local);
2123 mutex_unlock(&local->mtx);
2126 if (local->monitors == local->open_count && local->monitors > 0)
2127 ieee80211_add_virtual_monitor(local);
2130 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2131 * sessions can be established after a resume.
2133 * Also tear down aggregation sessions since reconfiguring
2134 * them in a hardware restart scenario is not easily done
2135 * right now, and the hardware will have lost information
2136 * about the sessions, but we and the AP still think they
2137 * are active. This is really a workaround though.
2139 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2140 mutex_lock(&local->sta_mtx);
2142 list_for_each_entry(sta, &local->sta_list, list) {
2143 if (!local->resuming)
2144 ieee80211_sta_tear_down_BA_sessions(
2145 sta, AGG_STOP_LOCAL_REQUEST);
2146 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2149 mutex_unlock(&local->sta_mtx);
2152 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2153 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2157 * If this is for hw restart things are still running.
2158 * We may want to change that later, however.
2160 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2161 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2167 /* first set suspended false, then resuming */
2168 local->suspended = false;
2170 local->resuming = false;
2172 ieee80211_flush_completed_scan(local, false);
2174 if (local->open_count && !reconfig_due_to_wowlan)
2175 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2177 list_for_each_entry(sdata, &local->interfaces, list) {
2178 if (!ieee80211_sdata_running(sdata))
2180 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2181 ieee80211_sta_restart(sdata);
2184 mod_timer(&local->sta_cleanup, jiffies + 1);
2192 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2194 struct ieee80211_sub_if_data *sdata;
2195 struct ieee80211_local *local;
2196 struct ieee80211_key *key;
2201 sdata = vif_to_sdata(vif);
2202 local = sdata->local;
2204 if (WARN_ON(!local->resuming))
2207 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2210 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2212 mutex_lock(&local->key_mtx);
2213 list_for_each_entry(key, &sdata->key_list, list)
2214 key->flags |= KEY_FLAG_TAINTED;
2215 mutex_unlock(&local->key_mtx);
2217 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2219 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2221 struct ieee80211_local *local = sdata->local;
2222 struct ieee80211_chanctx_conf *chanctx_conf;
2223 struct ieee80211_chanctx *chanctx;
2225 mutex_lock(&local->chanctx_mtx);
2227 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2228 lockdep_is_held(&local->chanctx_mtx));
2231 * This function can be called from a work, thus it may be possible
2232 * that the chanctx_conf is removed (due to a disconnection, for
2234 * So nothing should be done in such case.
2239 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2240 ieee80211_recalc_smps_chanctx(local, chanctx);
2242 mutex_unlock(&local->chanctx_mtx);
2245 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2247 struct ieee80211_local *local = sdata->local;
2248 struct ieee80211_chanctx_conf *chanctx_conf;
2249 struct ieee80211_chanctx *chanctx;
2251 mutex_lock(&local->chanctx_mtx);
2253 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2254 lockdep_is_held(&local->chanctx_mtx));
2256 if (WARN_ON_ONCE(!chanctx_conf))
2259 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2260 ieee80211_recalc_chanctx_min_def(local, chanctx);
2262 mutex_unlock(&local->chanctx_mtx);
2265 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2267 size_t pos = offset;
2269 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2270 pos += 2 + ies[pos + 1];
2275 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2279 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2281 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2285 * Scale up threshold values before storing it, as the RSSI averaging
2286 * algorithm uses a scaled up value as well. Change this scaling
2287 * factor if the RSSI averaging algorithm changes.
2289 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2290 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2293 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2299 WARN_ON(rssi_min_thold == rssi_max_thold ||
2300 rssi_min_thold > rssi_max_thold);
2302 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2305 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2307 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2309 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2311 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2313 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2315 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2320 *pos++ = WLAN_EID_HT_CAPABILITY;
2321 *pos++ = sizeof(struct ieee80211_ht_cap);
2322 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2324 /* capability flags */
2325 tmp = cpu_to_le16(cap);
2326 memcpy(pos, &tmp, sizeof(u16));
2329 /* AMPDU parameters */
2330 *pos++ = ht_cap->ampdu_factor |
2331 (ht_cap->ampdu_density <<
2332 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2335 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2336 pos += sizeof(ht_cap->mcs);
2338 /* extended capabilities */
2339 pos += sizeof(__le16);
2341 /* BF capabilities */
2342 pos += sizeof(__le32);
2344 /* antenna selection */
2350 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2355 *pos++ = WLAN_EID_VHT_CAPABILITY;
2356 *pos++ = sizeof(struct ieee80211_vht_cap);
2357 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2359 /* capability flags */
2360 tmp = cpu_to_le32(cap);
2361 memcpy(pos, &tmp, sizeof(u32));
2365 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2366 pos += sizeof(vht_cap->vht_mcs);
2371 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2372 const struct cfg80211_chan_def *chandef,
2373 u16 prot_mode, bool rifs_mode)
2375 struct ieee80211_ht_operation *ht_oper;
2376 /* Build HT Information */
2377 *pos++ = WLAN_EID_HT_OPERATION;
2378 *pos++ = sizeof(struct ieee80211_ht_operation);
2379 ht_oper = (struct ieee80211_ht_operation *)pos;
2380 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2381 chandef->chan->center_freq);
2382 switch (chandef->width) {
2383 case NL80211_CHAN_WIDTH_160:
2384 case NL80211_CHAN_WIDTH_80P80:
2385 case NL80211_CHAN_WIDTH_80:
2386 case NL80211_CHAN_WIDTH_40:
2387 if (chandef->center_freq1 > chandef->chan->center_freq)
2388 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2390 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2393 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2396 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2397 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2398 chandef->width != NL80211_CHAN_WIDTH_20)
2399 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2402 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2404 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2405 ht_oper->stbc_param = 0x0000;
2407 /* It seems that Basic MCS set and Supported MCS set
2408 are identical for the first 10 bytes */
2409 memset(&ht_oper->basic_set, 0, 16);
2410 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2412 return pos + sizeof(struct ieee80211_ht_operation);
2415 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2416 const struct cfg80211_chan_def *chandef)
2418 struct ieee80211_vht_operation *vht_oper;
2420 *pos++ = WLAN_EID_VHT_OPERATION;
2421 *pos++ = sizeof(struct ieee80211_vht_operation);
2422 vht_oper = (struct ieee80211_vht_operation *)pos;
2423 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2424 chandef->center_freq1);
2425 if (chandef->center_freq2)
2426 vht_oper->center_freq_seg2_idx =
2427 ieee80211_frequency_to_channel(chandef->center_freq2);
2429 vht_oper->center_freq_seg2_idx = 0x00;
2431 switch (chandef->width) {
2432 case NL80211_CHAN_WIDTH_160:
2434 * Convert 160 MHz channel width to new style as interop
2437 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2438 vht_oper->center_freq_seg2_idx = vht_oper->center_freq_seg1_idx;
2439 if (chandef->chan->center_freq < chandef->center_freq1)
2440 vht_oper->center_freq_seg1_idx -= 8;
2442 vht_oper->center_freq_seg1_idx += 8;
2444 case NL80211_CHAN_WIDTH_80P80:
2446 * Convert 80+80 MHz channel width to new style as interop
2449 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2451 case NL80211_CHAN_WIDTH_80:
2452 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2455 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2459 /* don't require special VHT peer rates */
2460 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2462 return pos + sizeof(struct ieee80211_vht_operation);
2465 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2466 struct cfg80211_chan_def *chandef)
2468 enum nl80211_channel_type channel_type;
2473 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2474 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2475 channel_type = NL80211_CHAN_HT20;
2477 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2478 channel_type = NL80211_CHAN_HT40PLUS;
2480 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2481 channel_type = NL80211_CHAN_HT40MINUS;
2484 channel_type = NL80211_CHAN_NO_HT;
2488 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2492 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2493 struct cfg80211_chan_def *chandef)
2495 struct cfg80211_chan_def new = *chandef;
2501 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2502 chandef->chan->band);
2503 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2504 chandef->chan->band);
2506 switch (oper->chan_width) {
2507 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2509 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2510 new.width = NL80211_CHAN_WIDTH_80;
2511 new.center_freq1 = cf1;
2512 /* If needed, adjust based on the newer interop workaround. */
2513 if (oper->center_freq_seg2_idx) {
2516 diff = abs(oper->center_freq_seg2_idx -
2517 oper->center_freq_seg1_idx);
2519 new.width = NL80211_CHAN_WIDTH_160;
2520 new.center_freq1 = cf2;
2521 } else if (diff > 8) {
2522 new.width = NL80211_CHAN_WIDTH_80P80;
2523 new.center_freq2 = cf2;
2527 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2528 new.width = NL80211_CHAN_WIDTH_160;
2529 new.center_freq1 = cf1;
2531 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2532 new.width = NL80211_CHAN_WIDTH_80P80;
2533 new.center_freq1 = cf1;
2534 new.center_freq2 = cf2;
2540 if (!cfg80211_chandef_valid(&new))
2547 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2548 const struct ieee80211_supported_band *sband,
2549 const u8 *srates, int srates_len, u32 *rates)
2551 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2552 int shift = ieee80211_chandef_get_shift(chandef);
2553 struct ieee80211_rate *br;
2554 int brate, rate, i, j, count = 0;
2558 for (i = 0; i < srates_len; i++) {
2559 rate = srates[i] & 0x7f;
2561 for (j = 0; j < sband->n_bitrates; j++) {
2562 br = &sband->bitrates[j];
2563 if ((rate_flags & br->flags) != rate_flags)
2566 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2567 if (brate == rate) {
2577 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2578 struct sk_buff *skb, bool need_basic,
2579 enum nl80211_band band)
2581 struct ieee80211_local *local = sdata->local;
2582 struct ieee80211_supported_band *sband;
2585 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2588 shift = ieee80211_vif_get_shift(&sdata->vif);
2589 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2590 sband = local->hw.wiphy->bands[band];
2592 for (i = 0; i < sband->n_bitrates; i++) {
2593 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2600 if (skb_tailroom(skb) < rates + 2)
2603 pos = skb_put(skb, rates + 2);
2604 *pos++ = WLAN_EID_SUPP_RATES;
2606 for (i = 0; i < rates; i++) {
2608 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2611 if (need_basic && basic_rates & BIT(i))
2613 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2615 *pos++ = basic | (u8) rate;
2621 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2622 struct sk_buff *skb, bool need_basic,
2623 enum nl80211_band band)
2625 struct ieee80211_local *local = sdata->local;
2626 struct ieee80211_supported_band *sband;
2628 u8 i, exrates, *pos;
2629 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2632 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2633 shift = ieee80211_vif_get_shift(&sdata->vif);
2635 sband = local->hw.wiphy->bands[band];
2637 for (i = 0; i < sband->n_bitrates; i++) {
2638 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2648 if (skb_tailroom(skb) < exrates + 2)
2652 pos = skb_put(skb, exrates + 2);
2653 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2655 for (i = 8; i < sband->n_bitrates; i++) {
2657 if ((rate_flags & sband->bitrates[i].flags)
2660 if (need_basic && basic_rates & BIT(i))
2662 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2664 *pos++ = basic | (u8) rate;
2670 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2672 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2673 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2675 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2676 /* non-managed type inferfaces */
2679 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2681 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2683 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2688 /* TODO: consider rx_highest */
2690 if (mcs->rx_mask[3])
2692 if (mcs->rx_mask[2])
2694 if (mcs->rx_mask[1])
2700 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2701 * @local: mac80211 hw info struct
2702 * @status: RX status
2703 * @mpdu_len: total MPDU length (including FCS)
2704 * @mpdu_offset: offset into MPDU to calculate timestamp at
2706 * This function calculates the RX timestamp at the given MPDU offset, taking
2707 * into account what the RX timestamp was. An offset of 0 will just normalize
2708 * the timestamp to TSF at beginning of MPDU reception.
2710 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2711 struct ieee80211_rx_status *status,
2712 unsigned int mpdu_len,
2713 unsigned int mpdu_offset)
2715 u64 ts = status->mactime;
2716 struct rate_info ri;
2719 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2722 memset(&ri, 0, sizeof(ri));
2724 /* Fill cfg80211 rate info */
2725 if (status->flag & RX_FLAG_HT) {
2726 ri.mcs = status->rate_idx;
2727 ri.flags |= RATE_INFO_FLAGS_MCS;
2728 if (status->flag & RX_FLAG_40MHZ)
2729 ri.bw = RATE_INFO_BW_40;
2731 ri.bw = RATE_INFO_BW_20;
2732 if (status->flag & RX_FLAG_SHORT_GI)
2733 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2734 } else if (status->flag & RX_FLAG_VHT) {
2735 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2736 ri.mcs = status->rate_idx;
2737 ri.nss = status->vht_nss;
2738 if (status->flag & RX_FLAG_40MHZ)
2739 ri.bw = RATE_INFO_BW_40;
2740 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2741 ri.bw = RATE_INFO_BW_80;
2742 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2743 ri.bw = RATE_INFO_BW_160;
2745 ri.bw = RATE_INFO_BW_20;
2746 if (status->flag & RX_FLAG_SHORT_GI)
2747 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2749 struct ieee80211_supported_band *sband;
2753 if (status->flag & RX_FLAG_10MHZ) {
2755 ri.bw = RATE_INFO_BW_10;
2756 } else if (status->flag & RX_FLAG_5MHZ) {
2758 ri.bw = RATE_INFO_BW_5;
2760 ri.bw = RATE_INFO_BW_20;
2763 sband = local->hw.wiphy->bands[status->band];
2764 bitrate = sband->bitrates[status->rate_idx].bitrate;
2765 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2767 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2768 /* TODO: handle HT/VHT preambles */
2769 if (status->band == NL80211_BAND_5GHZ) {
2772 } else if (status->flag & RX_FLAG_SHORTPRE) {
2780 rate = cfg80211_calculate_bitrate(&ri);
2781 if (WARN_ONCE(!rate,
2782 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2783 (unsigned long long)status->flag, status->rate_idx,
2787 /* rewind from end of MPDU */
2788 if (status->flag & RX_FLAG_MACTIME_END)
2789 ts -= mpdu_len * 8 * 10 / rate;
2791 ts += mpdu_offset * 8 * 10 / rate;
2796 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2798 struct ieee80211_sub_if_data *sdata;
2799 struct cfg80211_chan_def chandef;
2801 mutex_lock(&local->mtx);
2802 mutex_lock(&local->iflist_mtx);
2803 list_for_each_entry(sdata, &local->interfaces, list) {
2804 /* it might be waiting for the local->mtx, but then
2805 * by the time it gets it, sdata->wdev.cac_started
2806 * will no longer be true
2808 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2810 if (sdata->wdev.cac_started) {
2811 chandef = sdata->vif.bss_conf.chandef;
2812 ieee80211_vif_release_channel(sdata);
2813 cfg80211_cac_event(sdata->dev,
2815 NL80211_RADAR_CAC_ABORTED,
2819 mutex_unlock(&local->iflist_mtx);
2820 mutex_unlock(&local->mtx);
2823 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2825 struct ieee80211_local *local =
2826 container_of(work, struct ieee80211_local, radar_detected_work);
2827 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2828 struct ieee80211_chanctx *ctx;
2829 int num_chanctx = 0;
2831 mutex_lock(&local->chanctx_mtx);
2832 list_for_each_entry(ctx, &local->chanctx_list, list) {
2833 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2837 chandef = ctx->conf.def;
2839 mutex_unlock(&local->chanctx_mtx);
2841 ieee80211_dfs_cac_cancel(local);
2843 if (num_chanctx > 1)
2844 /* XXX: multi-channel is not supported yet */
2847 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2850 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2852 struct ieee80211_local *local = hw_to_local(hw);
2854 trace_api_radar_detected(local);
2856 ieee80211_queue_work(hw, &local->radar_detected_work);
2858 EXPORT_SYMBOL(ieee80211_radar_detected);
2860 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2866 case NL80211_CHAN_WIDTH_20:
2867 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2868 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2870 case NL80211_CHAN_WIDTH_40:
2871 c->width = NL80211_CHAN_WIDTH_20;
2872 c->center_freq1 = c->chan->center_freq;
2873 ret = IEEE80211_STA_DISABLE_40MHZ |
2874 IEEE80211_STA_DISABLE_VHT;
2876 case NL80211_CHAN_WIDTH_80:
2877 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2881 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2882 c->width = NL80211_CHAN_WIDTH_40;
2883 ret = IEEE80211_STA_DISABLE_VHT;
2885 case NL80211_CHAN_WIDTH_80P80:
2886 c->center_freq2 = 0;
2887 c->width = NL80211_CHAN_WIDTH_80;
2888 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2889 IEEE80211_STA_DISABLE_160MHZ;
2891 case NL80211_CHAN_WIDTH_160:
2893 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2896 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2897 c->width = NL80211_CHAN_WIDTH_80;
2898 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2899 IEEE80211_STA_DISABLE_160MHZ;
2902 case NL80211_CHAN_WIDTH_20_NOHT:
2904 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2905 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2907 case NL80211_CHAN_WIDTH_5:
2908 case NL80211_CHAN_WIDTH_10:
2911 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2915 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2921 * Returns true if smps_mode_new is strictly more restrictive than
2924 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2925 enum ieee80211_smps_mode smps_mode_new)
2927 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2928 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2931 switch (smps_mode_old) {
2932 case IEEE80211_SMPS_STATIC:
2934 case IEEE80211_SMPS_DYNAMIC:
2935 return smps_mode_new == IEEE80211_SMPS_STATIC;
2936 case IEEE80211_SMPS_OFF:
2937 return smps_mode_new != IEEE80211_SMPS_OFF;
2945 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2946 struct cfg80211_csa_settings *csa_settings)
2948 struct sk_buff *skb;
2949 struct ieee80211_mgmt *mgmt;
2950 struct ieee80211_local *local = sdata->local;
2952 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2953 sizeof(mgmt->u.action.u.chan_switch);
2956 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2957 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2960 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2961 5 + /* channel switch announcement element */
2962 3 + /* secondary channel offset element */
2963 8); /* mesh channel switch parameters element */
2967 skb_reserve(skb, local->tx_headroom);
2968 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2969 memset(mgmt, 0, hdr_len);
2970 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2971 IEEE80211_STYPE_ACTION);
2973 eth_broadcast_addr(mgmt->da);
2974 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2975 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2976 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2978 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2979 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2981 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2982 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2983 pos = skb_put(skb, 5);
2984 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2985 *pos++ = 3; /* IE length */
2986 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2987 freq = csa_settings->chandef.chan->center_freq;
2988 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2989 *pos++ = csa_settings->count; /* count */
2991 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2992 enum nl80211_channel_type ch_type;
2995 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2996 *pos++ = 1; /* IE length */
2997 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2998 if (ch_type == NL80211_CHAN_HT40PLUS)
2999 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3001 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3004 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3005 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3008 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3009 *pos++ = 6; /* IE length */
3010 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3011 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3012 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3013 *pos++ |= csa_settings->block_tx ?
3014 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3015 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3017 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3021 ieee80211_tx_skb(sdata, skb);
3025 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3027 return !(cs == NULL || cs->cipher == 0 ||
3028 cs->hdr_len < cs->pn_len + cs->pn_off ||
3029 cs->hdr_len <= cs->key_idx_off ||
3030 cs->key_idx_shift > 7 ||
3031 cs->key_idx_mask == 0);
3034 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3038 /* Ensure we have enough iftype bitmap space for all iftype values */
3039 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3041 for (i = 0; i < n; i++)
3042 if (!ieee80211_cs_valid(&cs[i]))
3048 const struct ieee80211_cipher_scheme *
3049 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3050 enum nl80211_iftype iftype)
3052 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3053 int n = local->hw.n_cipher_schemes;
3055 const struct ieee80211_cipher_scheme *cs = NULL;
3057 for (i = 0; i < n; i++) {
3058 if (l[i].cipher == cipher) {
3064 if (!cs || !(cs->iftype & BIT(iftype)))
3070 int ieee80211_cs_headroom(struct ieee80211_local *local,
3071 struct cfg80211_crypto_settings *crypto,
3072 enum nl80211_iftype iftype)
3074 const struct ieee80211_cipher_scheme *cs;
3075 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3078 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3079 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3082 if (cs && headroom < cs->hdr_len)
3083 headroom = cs->hdr_len;
3086 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3087 if (cs && headroom < cs->hdr_len)
3088 headroom = cs->hdr_len;
3094 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3096 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3103 if (data->count[i] == 1)
3106 if (data->desc[i].interval == 0)
3109 /* End time is in the past, check for repetitions */
3110 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3111 if (data->count[i] < 255) {
3112 if (data->count[i] <= skip) {
3117 data->count[i] -= skip;
3120 data->desc[i].start += skip * data->desc[i].interval;
3126 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3132 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3135 if (!data->count[i])
3138 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3141 cur = data->desc[i].start - tsf;
3145 cur = data->desc[i].start + data->desc[i].duration - tsf;
3154 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3159 * arbitrary limit, used to avoid infinite loops when combined NoA
3160 * descriptors cover the full time period.
3164 ieee80211_extend_absent_time(data, tsf, &offset);
3166 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3170 } while (tries < max_tries);
3175 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3177 u32 next_offset = BIT(31) - 1;
3181 data->has_next_tsf = false;
3182 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3185 if (!data->count[i])
3188 ieee80211_extend_noa_desc(data, tsf, i);
3189 start = data->desc[i].start - tsf;
3191 data->absent |= BIT(i);
3193 if (next_offset > start)
3194 next_offset = start;
3196 data->has_next_tsf = true;
3200 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3202 data->next_tsf = tsf + next_offset;
3204 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3206 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3207 struct ieee80211_noa_data *data, u32 tsf)
3212 memset(data, 0, sizeof(*data));
3214 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3215 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3217 if (!desc->count || !desc->duration)
3220 data->count[i] = desc->count;
3221 data->desc[i].start = le32_to_cpu(desc->start_time);
3222 data->desc[i].duration = le32_to_cpu(desc->duration);
3223 data->desc[i].interval = le32_to_cpu(desc->interval);
3225 if (data->count[i] > 1 &&
3226 data->desc[i].interval < data->desc[i].duration)
3229 ieee80211_extend_noa_desc(data, tsf, i);
3234 ieee80211_update_p2p_noa(data, tsf);
3238 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3240 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3241 struct ieee80211_sub_if_data *sdata)
3243 u64 tsf = drv_get_tsf(local, sdata);
3245 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3246 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3250 if (tsf == -1ULL || !beacon_int || !dtim_period)
3253 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3254 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3258 ps = &sdata->bss->ps;
3259 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3260 ps = &sdata->u.mesh.ps;
3266 * actually finds last dtim_count, mac80211 will update in
3267 * __beacon_add_tim().
3268 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3270 do_div(tsf, beacon_int);
3271 bcns_from_dtim = do_div(tsf, dtim_period);
3272 /* just had a DTIM */
3273 if (!bcns_from_dtim)
3276 dtim_count = dtim_period - bcns_from_dtim;
3278 ps->dtim_count = dtim_count;
3281 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3282 struct ieee80211_chanctx *ctx)
3284 struct ieee80211_sub_if_data *sdata;
3285 u8 radar_detect = 0;
3287 lockdep_assert_held(&local->chanctx_mtx);
3289 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3292 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3293 if (sdata->reserved_radar_required)
3294 radar_detect |= BIT(sdata->reserved_chandef.width);
3297 * An in-place reservation context should not have any assigned vifs
3298 * until it replaces the other context.
3300 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3301 !list_empty(&ctx->assigned_vifs));
3303 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3304 if (sdata->radar_required)
3305 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3307 return radar_detect;
3310 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3311 const struct cfg80211_chan_def *chandef,
3312 enum ieee80211_chanctx_mode chanmode,
3315 struct ieee80211_local *local = sdata->local;
3316 struct ieee80211_sub_if_data *sdata_iter;
3317 enum nl80211_iftype iftype = sdata->wdev.iftype;
3318 int num[NUM_NL80211_IFTYPES];
3319 struct ieee80211_chanctx *ctx;
3320 int num_different_channels = 0;
3323 lockdep_assert_held(&local->chanctx_mtx);
3325 if (WARN_ON(hweight32(radar_detect) > 1))
3328 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3333 num_different_channels = 1;
3335 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3338 /* Always allow software iftypes */
3339 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3345 memset(num, 0, sizeof(num));
3347 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3350 list_for_each_entry(ctx, &local->chanctx_list, list) {
3351 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3353 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3354 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3355 num_different_channels++;
3358 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3359 cfg80211_chandef_compatible(chandef,
3362 num_different_channels++;
3365 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3366 struct wireless_dev *wdev_iter;
3368 wdev_iter = &sdata_iter->wdev;
3370 if (sdata_iter == sdata ||
3371 !ieee80211_sdata_running(sdata_iter) ||
3372 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3375 num[wdev_iter->iftype]++;
3379 if (total == 1 && !radar_detect)
3382 return cfg80211_check_combinations(local->hw.wiphy,
3383 num_different_channels,
3388 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3391 u32 *max_num_different_channels = data;
3393 *max_num_different_channels = max(*max_num_different_channels,
3394 c->num_different_channels);
3397 int ieee80211_max_num_channels(struct ieee80211_local *local)
3399 struct ieee80211_sub_if_data *sdata;
3400 int num[NUM_NL80211_IFTYPES] = {};
3401 struct ieee80211_chanctx *ctx;
3402 int num_different_channels = 0;
3403 u8 radar_detect = 0;
3404 u32 max_num_different_channels = 1;
3407 lockdep_assert_held(&local->chanctx_mtx);
3409 list_for_each_entry(ctx, &local->chanctx_list, list) {
3410 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3413 num_different_channels++;
3415 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3418 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3419 num[sdata->wdev.iftype]++;
3421 err = cfg80211_iter_combinations(local->hw.wiphy,
3422 num_different_channels, radar_detect,
3423 num, ieee80211_iter_max_chans,
3424 &max_num_different_channels);
3428 return max_num_different_channels;
3431 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3433 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3434 *buf++ = 7; /* len */
3435 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3438 *buf++ = 2; /* WME */
3439 *buf++ = 0; /* WME info */
3440 *buf++ = 1; /* WME ver */
3441 *buf++ = qosinfo; /* U-APSD no in use */
3446 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3447 unsigned long *frame_cnt,
3448 unsigned long *byte_cnt)
3450 struct txq_info *txqi = to_txq_info(txq);
3451 u32 frag_cnt = 0, frag_bytes = 0;
3452 struct sk_buff *skb;
3454 skb_queue_walk(&txqi->frags, skb) {
3456 frag_bytes += skb->len;
3460 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3463 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3465 EXPORT_SYMBOL(ieee80211_txq_get_depth);