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
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:
831 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
833 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
834 * that if the content gets bigger it might be needed more than once
836 if (test_bit(id, seen_elems)) {
837 elems->parse_error = true;
845 if (calc_crc && id < 64 && (filter & (1ULL << id)))
846 crc = crc32_be(crc, pos - 2, elen + 2);
848 elem_parse_failed = false;
851 case WLAN_EID_LINK_ID:
852 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
853 elem_parse_failed = true;
856 elems->lnk_id = (void *)(pos - 2);
858 case WLAN_EID_CHAN_SWITCH_TIMING:
859 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
860 elem_parse_failed = true;
863 elems->ch_sw_timing = (void *)pos;
865 case WLAN_EID_EXT_CAPABILITY:
866 elems->ext_capab = pos;
867 elems->ext_capab_len = elen;
871 elems->ssid_len = elen;
873 case WLAN_EID_SUPP_RATES:
874 elems->supp_rates = pos;
875 elems->supp_rates_len = elen;
877 case WLAN_EID_DS_PARAMS:
879 elems->ds_params = pos;
881 elem_parse_failed = true;
884 if (elen >= sizeof(struct ieee80211_tim_ie)) {
885 elems->tim = (void *)pos;
886 elems->tim_len = elen;
888 elem_parse_failed = true;
890 case WLAN_EID_CHALLENGE:
891 elems->challenge = pos;
892 elems->challenge_len = elen;
894 case WLAN_EID_VENDOR_SPECIFIC:
895 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
897 /* Microsoft OUI (00:50:F2) */
900 crc = crc32_be(crc, pos - 2, elen + 2);
902 if (elen >= 5 && pos[3] == 2) {
903 /* OUI Type 2 - WMM IE */
905 elems->wmm_info = pos;
906 elems->wmm_info_len = elen;
907 } else if (pos[4] == 1) {
908 elems->wmm_param = pos;
909 elems->wmm_param_len = elen;
916 elems->rsn_len = elen;
918 case WLAN_EID_ERP_INFO:
920 elems->erp_info = pos;
922 elem_parse_failed = true;
924 case WLAN_EID_EXT_SUPP_RATES:
925 elems->ext_supp_rates = pos;
926 elems->ext_supp_rates_len = elen;
928 case WLAN_EID_HT_CAPABILITY:
929 if (elen >= sizeof(struct ieee80211_ht_cap))
930 elems->ht_cap_elem = (void *)pos;
932 elem_parse_failed = true;
934 case WLAN_EID_HT_OPERATION:
935 if (elen >= sizeof(struct ieee80211_ht_operation))
936 elems->ht_operation = (void *)pos;
938 elem_parse_failed = true;
940 case WLAN_EID_VHT_CAPABILITY:
941 if (elen >= sizeof(struct ieee80211_vht_cap))
942 elems->vht_cap_elem = (void *)pos;
944 elem_parse_failed = true;
946 case WLAN_EID_VHT_OPERATION:
947 if (elen >= sizeof(struct ieee80211_vht_operation)) {
948 elems->vht_operation = (void *)pos;
950 crc = crc32_be(crc, pos - 2, elen + 2);
953 elem_parse_failed = true;
955 case WLAN_EID_OPMODE_NOTIF:
957 elems->opmode_notif = pos;
959 crc = crc32_be(crc, pos - 2, elen + 2);
962 elem_parse_failed = true;
964 case WLAN_EID_MESH_ID:
965 elems->mesh_id = pos;
966 elems->mesh_id_len = elen;
968 case WLAN_EID_MESH_CONFIG:
969 if (elen >= sizeof(struct ieee80211_meshconf_ie))
970 elems->mesh_config = (void *)pos;
972 elem_parse_failed = true;
974 case WLAN_EID_PEER_MGMT:
975 elems->peering = pos;
976 elems->peering_len = elen;
978 case WLAN_EID_MESH_AWAKE_WINDOW:
980 elems->awake_window = (void *)pos;
984 elems->preq_len = elen;
988 elems->prep_len = elen;
992 elems->perr_len = elen;
995 if (elen >= sizeof(struct ieee80211_rann_ie))
996 elems->rann = (void *)pos;
998 elem_parse_failed = true;
1000 case WLAN_EID_CHANNEL_SWITCH:
1001 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1002 elem_parse_failed = true;
1005 elems->ch_switch_ie = (void *)pos;
1007 case WLAN_EID_EXT_CHANSWITCH_ANN:
1008 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1009 elem_parse_failed = true;
1012 elems->ext_chansw_ie = (void *)pos;
1014 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1015 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1016 elem_parse_failed = true;
1019 elems->sec_chan_offs = (void *)pos;
1021 case WLAN_EID_CHAN_SWITCH_PARAM:
1023 sizeof(*elems->mesh_chansw_params_ie)) {
1024 elem_parse_failed = true;
1027 elems->mesh_chansw_params_ie = (void *)pos;
1029 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1031 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1032 elem_parse_failed = true;
1035 elems->wide_bw_chansw_ie = (void *)pos;
1037 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1039 elem_parse_failed = true;
1043 * This is a bit tricky, but as we only care about
1044 * the wide bandwidth channel switch element, so
1045 * just parse it out manually.
1047 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1050 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1051 elems->wide_bw_chansw_ie =
1054 elem_parse_failed = true;
1057 case WLAN_EID_COUNTRY:
1058 elems->country_elem = pos;
1059 elems->country_elem_len = elen;
1061 case WLAN_EID_PWR_CONSTRAINT:
1063 elem_parse_failed = true;
1066 elems->pwr_constr_elem = pos;
1068 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1069 /* Lots of different options exist, but we only care
1070 * about the Dynamic Transmit Power Control element.
1071 * First check for the Cisco OUI, then for the DTPC
1075 elem_parse_failed = true;
1079 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1080 pos[2] != 0x96 || pos[3] != 0x00)
1084 elem_parse_failed = true;
1089 crc = crc32_be(crc, pos - 2, elen + 2);
1091 elems->cisco_dtpc_elem = pos;
1093 case WLAN_EID_TIMEOUT_INTERVAL:
1094 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1095 elems->timeout_int = (void *)pos;
1097 elem_parse_failed = true;
1099 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1100 if (elen >= sizeof(*elems->max_idle_period_ie))
1101 elems->max_idle_period_ie = (void *)pos;
1107 if (elem_parse_failed)
1108 elems->parse_error = true;
1110 __set_bit(id, seen_elems);
1117 elems->parse_error = true;
1122 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1123 bool bss_notify, bool enable_qos)
1125 struct ieee80211_local *local = sdata->local;
1126 struct ieee80211_tx_queue_params qparam;
1127 struct ieee80211_chanctx_conf *chanctx_conf;
1130 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1133 if (!local->ops->conf_tx)
1136 if (local->hw.queues < IEEE80211_NUM_ACS)
1139 memset(&qparam, 0, sizeof(qparam));
1142 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1143 use_11b = (chanctx_conf &&
1144 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1145 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1148 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1150 /* Set defaults according to 802.11-2007 Table 7-37 */
1157 /* Confiure old 802.11b/g medium access rules. */
1158 qparam.cw_max = aCWmax;
1159 qparam.cw_min = aCWmin;
1163 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1164 /* Update if QoS is enabled. */
1167 case IEEE80211_AC_BK:
1168 qparam.cw_max = aCWmax;
1169 qparam.cw_min = aCWmin;
1176 /* never happens but let's not leave undefined */
1178 case IEEE80211_AC_BE:
1179 qparam.cw_max = aCWmax;
1180 qparam.cw_min = aCWmin;
1187 case IEEE80211_AC_VI:
1188 qparam.cw_max = aCWmin;
1189 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1193 qparam.txop = 6016/32;
1195 qparam.txop = 3008/32;
1202 case IEEE80211_AC_VO:
1203 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1204 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1208 qparam.txop = 3264/32;
1210 qparam.txop = 1504/32;
1216 qparam.uapsd = false;
1218 sdata->tx_conf[ac] = qparam;
1219 drv_conf_tx(local, sdata, ac, &qparam);
1222 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1223 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1224 sdata->vif.type != NL80211_IFTYPE_NAN) {
1225 sdata->vif.bss_conf.qos = enable_qos;
1227 ieee80211_bss_info_change_notify(sdata,
1232 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1233 u16 transaction, u16 auth_alg, u16 status,
1234 const u8 *extra, size_t extra_len, const u8 *da,
1235 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1238 struct ieee80211_local *local = sdata->local;
1239 struct sk_buff *skb;
1240 struct ieee80211_mgmt *mgmt;
1243 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1244 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1245 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1249 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1251 mgmt = skb_put_zero(skb, 24 + 6);
1252 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1253 IEEE80211_STYPE_AUTH);
1254 memcpy(mgmt->da, da, ETH_ALEN);
1255 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1256 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1257 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1258 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1259 mgmt->u.auth.status_code = cpu_to_le16(status);
1261 skb_put_data(skb, extra, extra_len);
1263 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1264 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1265 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1269 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1271 ieee80211_tx_skb(sdata, skb);
1274 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1275 const u8 *bssid, u16 stype, u16 reason,
1276 bool send_frame, u8 *frame_buf)
1278 struct ieee80211_local *local = sdata->local;
1279 struct sk_buff *skb;
1280 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1283 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1284 mgmt->duration = 0; /* initialize only */
1285 mgmt->seq_ctrl = 0; /* initialize only */
1286 memcpy(mgmt->da, bssid, ETH_ALEN);
1287 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1288 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1289 /* u.deauth.reason_code == u.disassoc.reason_code */
1290 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1293 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1294 IEEE80211_DEAUTH_FRAME_LEN);
1298 skb_reserve(skb, local->hw.extra_tx_headroom);
1301 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1303 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1304 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1305 IEEE80211_SKB_CB(skb)->flags |=
1306 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1308 ieee80211_tx_skb(sdata, skb);
1312 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1313 u8 *buffer, size_t buffer_len,
1314 const u8 *ie, size_t ie_len,
1315 enum nl80211_band band,
1317 struct cfg80211_chan_def *chandef,
1320 struct ieee80211_supported_band *sband;
1321 u8 *pos = buffer, *end = buffer + buffer_len;
1323 int supp_rates_len, i;
1329 bool have_80mhz = false;
1333 sband = local->hw.wiphy->bands[band];
1334 if (WARN_ON_ONCE(!sband))
1337 rate_flags = ieee80211_chandef_rate_flags(chandef);
1338 shift = ieee80211_chandef_get_shift(chandef);
1341 for (i = 0; i < sband->n_bitrates; i++) {
1342 if ((BIT(i) & rate_mask) == 0)
1343 continue; /* skip rate */
1344 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1347 rates[num_rates++] =
1348 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1352 supp_rates_len = min_t(int, num_rates, 8);
1354 if (end - pos < 2 + supp_rates_len)
1356 *pos++ = WLAN_EID_SUPP_RATES;
1357 *pos++ = supp_rates_len;
1358 memcpy(pos, rates, supp_rates_len);
1359 pos += supp_rates_len;
1361 /* insert "request information" if in custom IEs */
1363 static const u8 before_extrates[] = {
1365 WLAN_EID_SUPP_RATES,
1368 noffset = ieee80211_ie_split(ie, ie_len,
1370 ARRAY_SIZE(before_extrates),
1372 if (end - pos < noffset - *offset)
1374 memcpy(pos, ie + *offset, noffset - *offset);
1375 pos += noffset - *offset;
1379 ext_rates_len = num_rates - supp_rates_len;
1380 if (ext_rates_len > 0) {
1381 if (end - pos < 2 + ext_rates_len)
1383 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1384 *pos++ = ext_rates_len;
1385 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1386 pos += ext_rates_len;
1389 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1392 *pos++ = WLAN_EID_DS_PARAMS;
1394 *pos++ = ieee80211_frequency_to_channel(
1395 chandef->chan->center_freq);
1398 /* insert custom IEs that go before HT */
1400 static const u8 before_ht[] = {
1402 WLAN_EID_SUPP_RATES,
1404 WLAN_EID_EXT_SUPP_RATES,
1406 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1408 noffset = ieee80211_ie_split(ie, ie_len,
1409 before_ht, ARRAY_SIZE(before_ht),
1411 if (end - pos < noffset - *offset)
1413 memcpy(pos, ie + *offset, noffset - *offset);
1414 pos += noffset - *offset;
1418 if (sband->ht_cap.ht_supported) {
1419 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1421 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1426 * If adding more here, adjust code in main.c
1427 * that calculates local->scan_ies_len.
1430 /* insert custom IEs that go before VHT */
1432 static const u8 before_vht[] = {
1434 WLAN_EID_SUPP_RATES,
1436 WLAN_EID_EXT_SUPP_RATES,
1438 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1439 WLAN_EID_HT_CAPABILITY,
1440 WLAN_EID_BSS_COEX_2040,
1441 WLAN_EID_EXT_CAPABILITY,
1443 WLAN_EID_CHANNEL_USAGE,
1444 WLAN_EID_INTERWORKING,
1446 /* 60 GHz can't happen here right now */
1448 noffset = ieee80211_ie_split(ie, ie_len,
1449 before_vht, ARRAY_SIZE(before_vht),
1451 if (end - pos < noffset - *offset)
1453 memcpy(pos, ie + *offset, noffset - *offset);
1454 pos += noffset - *offset;
1458 /* Check if any channel in this sband supports at least 80 MHz */
1459 for (i = 0; i < sband->n_channels; i++) {
1460 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1461 IEEE80211_CHAN_NO_80MHZ))
1468 if (sband->vht_cap.vht_supported && have_80mhz) {
1469 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1471 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1472 sband->vht_cap.cap);
1475 return pos - buffer;
1477 WARN_ONCE(1, "not enough space for preq IEs\n");
1478 return pos - buffer;
1481 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1483 struct ieee80211_scan_ies *ie_desc,
1484 const u8 *ie, size_t ie_len,
1485 u8 bands_used, u32 *rate_masks,
1486 struct cfg80211_chan_def *chandef)
1488 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1491 memset(ie_desc, 0, sizeof(*ie_desc));
1493 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1494 if (bands_used & BIT(i)) {
1495 pos += ieee80211_build_preq_ies_band(local,
1502 ie_desc->ies[i] = buffer + old_pos;
1503 ie_desc->len[i] = pos - old_pos;
1508 /* add any remaining custom IEs */
1510 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1511 "not enough space for preq custom IEs\n"))
1513 memcpy(buffer + pos, ie + custom_ie_offset,
1514 ie_len - custom_ie_offset);
1515 ie_desc->common_ies = buffer + pos;
1516 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1517 pos += ie_len - custom_ie_offset;
1523 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1524 const u8 *src, const u8 *dst,
1526 struct ieee80211_channel *chan,
1527 const u8 *ssid, size_t ssid_len,
1528 const u8 *ie, size_t ie_len,
1531 struct ieee80211_local *local = sdata->local;
1532 struct cfg80211_chan_def chandef;
1533 struct sk_buff *skb;
1534 struct ieee80211_mgmt *mgmt;
1536 u32 rate_masks[NUM_NL80211_BANDS] = {};
1537 struct ieee80211_scan_ies dummy_ie_desc;
1540 * Do not send DS Channel parameter for directed probe requests
1541 * in order to maximize the chance that we get a response. Some
1542 * badly-behaved APs don't respond when this parameter is included.
1544 chandef.width = sdata->vif.bss_conf.chandef.width;
1546 chandef.chan = NULL;
1548 chandef.chan = chan;
1550 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1555 rate_masks[chan->band] = ratemask;
1556 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1557 skb_tailroom(skb), &dummy_ie_desc,
1558 ie, ie_len, BIT(chan->band),
1559 rate_masks, &chandef);
1560 skb_put(skb, ies_len);
1563 mgmt = (struct ieee80211_mgmt *) skb->data;
1564 memcpy(mgmt->da, dst, ETH_ALEN);
1565 memcpy(mgmt->bssid, dst, ETH_ALEN);
1568 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1573 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1574 const u8 *src, const u8 *dst,
1575 const u8 *ssid, size_t ssid_len,
1576 const u8 *ie, size_t ie_len,
1577 u32 ratemask, bool directed, u32 tx_flags,
1578 struct ieee80211_channel *channel, bool scan)
1580 struct sk_buff *skb;
1582 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1584 ie, ie_len, directed);
1586 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1588 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1590 ieee80211_tx_skb(sdata, skb);
1594 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1595 struct ieee802_11_elems *elems,
1596 enum nl80211_band band, u32 *basic_rates)
1598 struct ieee80211_supported_band *sband;
1600 u32 supp_rates, rate_flags;
1603 sband = sdata->local->hw.wiphy->bands[band];
1604 if (WARN_ON(!sband))
1607 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1608 shift = ieee80211_vif_get_shift(&sdata->vif);
1610 num_rates = sband->n_bitrates;
1612 for (i = 0; i < elems->supp_rates_len +
1613 elems->ext_supp_rates_len; i++) {
1617 if (i < elems->supp_rates_len)
1618 rate = elems->supp_rates[i];
1619 else if (elems->ext_supp_rates)
1620 rate = elems->ext_supp_rates
1621 [i - elems->supp_rates_len];
1622 own_rate = 5 * (rate & 0x7f);
1623 is_basic = !!(rate & 0x80);
1625 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1628 for (j = 0; j < num_rates; j++) {
1630 if ((rate_flags & sband->bitrates[j].flags)
1634 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1637 if (brate == own_rate) {
1638 supp_rates |= BIT(j);
1639 if (basic_rates && is_basic)
1640 *basic_rates |= BIT(j);
1647 void ieee80211_stop_device(struct ieee80211_local *local)
1649 ieee80211_led_radio(local, false);
1650 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1652 cancel_work_sync(&local->reconfig_filter);
1654 flush_workqueue(local->workqueue);
1658 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1661 /* It's possible that we don't handle the scan completion in
1662 * time during suspend, so if it's still marked as completed
1663 * here, queue the work and flush it to clean things up.
1664 * Instead of calling the worker function directly here, we
1665 * really queue it to avoid potential races with other flows
1666 * scheduling the same work.
1668 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1669 /* If coming from reconfiguration failure, abort the scan so
1670 * we don't attempt to continue a partial HW scan - which is
1671 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1672 * completed scan, and a 5 GHz portion is still pending.
1675 set_bit(SCAN_ABORTED, &local->scanning);
1676 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1677 flush_delayed_work(&local->scan_work);
1681 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1683 struct ieee80211_sub_if_data *sdata;
1684 struct ieee80211_chanctx *ctx;
1687 * We get here if during resume the device can't be restarted properly.
1688 * We might also get here if this happens during HW reset, which is a
1689 * slightly different situation and we need to drop all connections in
1692 * Ask cfg80211 to turn off all interfaces, this will result in more
1693 * warnings but at least we'll then get into a clean stopped state.
1696 local->resuming = false;
1697 local->suspended = false;
1698 local->in_reconfig = false;
1700 ieee80211_flush_completed_scan(local, true);
1702 /* scheduled scan clearly can't be running any more, but tell
1703 * cfg80211 and clear local state
1705 ieee80211_sched_scan_end(local);
1707 list_for_each_entry(sdata, &local->interfaces, list)
1708 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1710 /* Mark channel contexts as not being in the driver any more to avoid
1711 * removing them from the driver during the shutdown process...
1713 mutex_lock(&local->chanctx_mtx);
1714 list_for_each_entry(ctx, &local->chanctx_list, list)
1715 ctx->driver_present = false;
1716 mutex_unlock(&local->chanctx_mtx);
1718 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1721 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1722 struct ieee80211_sub_if_data *sdata)
1724 struct ieee80211_chanctx_conf *conf;
1725 struct ieee80211_chanctx *ctx;
1727 if (!local->use_chanctx)
1730 mutex_lock(&local->chanctx_mtx);
1731 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1732 lockdep_is_held(&local->chanctx_mtx));
1734 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1735 drv_assign_vif_chanctx(local, sdata, ctx);
1737 mutex_unlock(&local->chanctx_mtx);
1740 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1742 struct ieee80211_local *local = sdata->local;
1743 struct sta_info *sta;
1746 mutex_lock(&local->sta_mtx);
1747 list_for_each_entry(sta, &local->sta_list, list) {
1748 enum ieee80211_sta_state state;
1750 if (!sta->uploaded || sta->sdata != sdata)
1753 for (state = IEEE80211_STA_NOTEXIST;
1754 state < sta->sta_state; state++)
1755 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1758 mutex_unlock(&local->sta_mtx);
1761 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1763 struct cfg80211_nan_func *func, **funcs;
1766 res = drv_start_nan(sdata->local, sdata,
1767 &sdata->u.nan.conf);
1771 funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1772 sizeof(*funcs), GFP_KERNEL);
1776 /* Add all the functions:
1777 * This is a little bit ugly. We need to call a potentially sleeping
1778 * callback for each NAN function, so we can't hold the spinlock.
1780 spin_lock_bh(&sdata->u.nan.func_lock);
1782 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1785 spin_unlock_bh(&sdata->u.nan.func_lock);
1787 for (i = 0; funcs[i]; i++) {
1788 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1790 ieee80211_nan_func_terminated(&sdata->vif,
1791 funcs[i]->instance_id,
1792 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1801 int ieee80211_reconfig(struct ieee80211_local *local)
1803 struct ieee80211_hw *hw = &local->hw;
1804 struct ieee80211_sub_if_data *sdata;
1805 struct ieee80211_chanctx *ctx;
1806 struct sta_info *sta;
1808 bool reconfig_due_to_wowlan = false;
1809 struct ieee80211_sub_if_data *sched_scan_sdata;
1810 struct cfg80211_sched_scan_request *sched_scan_req;
1811 bool sched_scan_stopped = false;
1812 bool suspended = local->suspended;
1814 /* nothing to do if HW shouldn't run */
1815 if (!local->open_count)
1820 local->resuming = true;
1822 if (local->wowlan) {
1824 * In the wowlan case, both mac80211 and the device
1825 * are functional when the resume op is called, so
1826 * clear local->suspended so the device could operate
1827 * normally (e.g. pass rx frames).
1829 local->suspended = false;
1830 res = drv_resume(local);
1831 local->wowlan = false;
1833 local->resuming = false;
1840 * res is 1, which means the driver requested
1841 * to go through a regular reset on wakeup.
1842 * restore local->suspended in this case.
1844 reconfig_due_to_wowlan = true;
1845 local->suspended = true;
1850 * In case of hw_restart during suspend (without wowlan),
1851 * cancel restart work, as we are reconfiguring the device
1853 * Note that restart_work is scheduled on a frozen workqueue,
1854 * so we can't deadlock in this case.
1856 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1857 cancel_work_sync(&local->restart_work);
1859 local->started = false;
1862 * Upon resume hardware can sometimes be goofy due to
1863 * various platform / driver / bus issues, so restarting
1864 * the device may at times not work immediately. Propagate
1867 res = drv_start(local);
1870 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1872 WARN(1, "Hardware became unavailable during restart.\n");
1873 ieee80211_handle_reconfig_failure(local);
1877 /* setup fragmentation threshold */
1878 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1880 /* setup RTS threshold */
1881 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1883 /* reset coverage class */
1884 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1886 ieee80211_led_radio(local, true);
1887 ieee80211_mod_tpt_led_trig(local,
1888 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1890 /* add interfaces */
1891 sdata = rtnl_dereference(local->monitor_sdata);
1893 /* in HW restart it exists already */
1894 WARN_ON(local->resuming);
1895 res = drv_add_interface(local, sdata);
1897 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1903 list_for_each_entry(sdata, &local->interfaces, list) {
1904 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1905 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1906 ieee80211_sdata_running(sdata)) {
1907 res = drv_add_interface(local, sdata);
1913 /* If adding any of the interfaces failed above, roll back and
1917 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1919 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1920 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1921 ieee80211_sdata_running(sdata))
1922 drv_remove_interface(local, sdata);
1923 ieee80211_handle_reconfig_failure(local);
1927 /* add channel contexts */
1928 if (local->use_chanctx) {
1929 mutex_lock(&local->chanctx_mtx);
1930 list_for_each_entry(ctx, &local->chanctx_list, list)
1931 if (ctx->replace_state !=
1932 IEEE80211_CHANCTX_REPLACES_OTHER)
1933 WARN_ON(drv_add_chanctx(local, ctx));
1934 mutex_unlock(&local->chanctx_mtx);
1936 sdata = rtnl_dereference(local->monitor_sdata);
1937 if (sdata && ieee80211_sdata_running(sdata))
1938 ieee80211_assign_chanctx(local, sdata);
1941 /* reconfigure hardware */
1942 ieee80211_hw_config(local, ~0);
1944 ieee80211_configure_filter(local);
1946 /* Finally also reconfigure all the BSS information */
1947 list_for_each_entry(sdata, &local->interfaces, list) {
1950 if (!ieee80211_sdata_running(sdata))
1953 ieee80211_assign_chanctx(local, sdata);
1955 switch (sdata->vif.type) {
1956 case NL80211_IFTYPE_AP_VLAN:
1957 case NL80211_IFTYPE_MONITOR:
1960 ieee80211_reconfig_stations(sdata);
1962 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1963 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1964 drv_conf_tx(local, sdata, i,
1965 &sdata->tx_conf[i]);
1969 /* common change flags for all interface types */
1970 changed = BSS_CHANGED_ERP_CTS_PROT |
1971 BSS_CHANGED_ERP_PREAMBLE |
1972 BSS_CHANGED_ERP_SLOT |
1974 BSS_CHANGED_BASIC_RATES |
1975 BSS_CHANGED_BEACON_INT |
1980 BSS_CHANGED_TXPOWER;
1982 if (sdata->vif.mu_mimo_owner)
1983 changed |= BSS_CHANGED_MU_GROUPS;
1985 switch (sdata->vif.type) {
1986 case NL80211_IFTYPE_STATION:
1987 changed |= BSS_CHANGED_ASSOC |
1988 BSS_CHANGED_ARP_FILTER |
1991 /* Re-send beacon info report to the driver */
1992 if (sdata->u.mgd.have_beacon)
1993 changed |= BSS_CHANGED_BEACON_INFO;
1995 if (sdata->vif.bss_conf.max_idle_period ||
1996 sdata->vif.bss_conf.protected_keep_alive)
1997 changed |= BSS_CHANGED_KEEP_ALIVE;
2000 ieee80211_bss_info_change_notify(sdata, changed);
2001 sdata_unlock(sdata);
2003 case NL80211_IFTYPE_OCB:
2004 changed |= BSS_CHANGED_OCB;
2005 ieee80211_bss_info_change_notify(sdata, changed);
2007 case NL80211_IFTYPE_ADHOC:
2008 changed |= BSS_CHANGED_IBSS;
2010 case NL80211_IFTYPE_AP:
2011 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2013 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2014 changed |= BSS_CHANGED_AP_PROBE_RESP;
2016 if (rcu_access_pointer(sdata->u.ap.beacon))
2017 drv_start_ap(local, sdata);
2021 case NL80211_IFTYPE_MESH_POINT:
2022 if (sdata->vif.bss_conf.enable_beacon) {
2023 changed |= BSS_CHANGED_BEACON |
2024 BSS_CHANGED_BEACON_ENABLED;
2025 ieee80211_bss_info_change_notify(sdata, changed);
2028 case NL80211_IFTYPE_NAN:
2029 res = ieee80211_reconfig_nan(sdata);
2031 ieee80211_handle_reconfig_failure(local);
2035 case NL80211_IFTYPE_WDS:
2036 case NL80211_IFTYPE_AP_VLAN:
2037 case NL80211_IFTYPE_MONITOR:
2038 case NL80211_IFTYPE_P2P_DEVICE:
2041 case NL80211_IFTYPE_UNSPECIFIED:
2042 case NUM_NL80211_IFTYPES:
2043 case NL80211_IFTYPE_P2P_CLIENT:
2044 case NL80211_IFTYPE_P2P_GO:
2050 ieee80211_recalc_ps(local);
2053 * The sta might be in psm against the ap (e.g. because
2054 * this was the state before a hw restart), so we
2055 * explicitly send a null packet in order to make sure
2056 * it'll sync against the ap (and get out of psm).
2058 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2059 list_for_each_entry(sdata, &local->interfaces, list) {
2060 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2062 if (!sdata->u.mgd.associated)
2065 ieee80211_send_nullfunc(local, sdata, false);
2069 /* APs are now beaconing, add back stations */
2070 mutex_lock(&local->sta_mtx);
2071 list_for_each_entry(sta, &local->sta_list, list) {
2072 enum ieee80211_sta_state state;
2077 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2078 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2081 for (state = IEEE80211_STA_NOTEXIST;
2082 state < sta->sta_state; state++)
2083 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2086 mutex_unlock(&local->sta_mtx);
2089 list_for_each_entry(sdata, &local->interfaces, list)
2090 ieee80211_reset_crypto_tx_tailroom(sdata);
2092 list_for_each_entry(sdata, &local->interfaces, list)
2093 if (ieee80211_sdata_running(sdata))
2094 ieee80211_enable_keys(sdata);
2096 /* Reconfigure sched scan if it was interrupted by FW restart */
2097 mutex_lock(&local->mtx);
2098 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2099 lockdep_is_held(&local->mtx));
2100 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2101 lockdep_is_held(&local->mtx));
2102 if (sched_scan_sdata && sched_scan_req)
2104 * Sched scan stopped, but we don't want to report it. Instead,
2105 * we're trying to reschedule. However, if more than one scan
2106 * plan was set, we cannot reschedule since we don't know which
2107 * scan plan was currently running (and some scan plans may have
2108 * already finished).
2110 if (sched_scan_req->n_scan_plans > 1 ||
2111 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2113 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2114 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2115 sched_scan_stopped = true;
2117 mutex_unlock(&local->mtx);
2119 if (sched_scan_stopped)
2120 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2123 if (local->in_reconfig) {
2124 local->in_reconfig = false;
2127 /* Restart deferred ROCs */
2128 mutex_lock(&local->mtx);
2129 ieee80211_start_next_roc(local);
2130 mutex_unlock(&local->mtx);
2133 if (local->monitors == local->open_count && local->monitors > 0)
2134 ieee80211_add_virtual_monitor(local);
2137 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2138 * sessions can be established after a resume.
2140 * Also tear down aggregation sessions since reconfiguring
2141 * them in a hardware restart scenario is not easily done
2142 * right now, and the hardware will have lost information
2143 * about the sessions, but we and the AP still think they
2144 * are active. This is really a workaround though.
2146 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2147 mutex_lock(&local->sta_mtx);
2149 list_for_each_entry(sta, &local->sta_list, list) {
2150 if (!local->resuming)
2151 ieee80211_sta_tear_down_BA_sessions(
2152 sta, AGG_STOP_LOCAL_REQUEST);
2153 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2156 mutex_unlock(&local->sta_mtx);
2159 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2160 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2164 * If this is for hw restart things are still running.
2165 * We may want to change that later, however.
2167 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2168 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2174 /* first set suspended false, then resuming */
2175 local->suspended = false;
2177 local->resuming = false;
2179 ieee80211_flush_completed_scan(local, false);
2181 if (local->open_count && !reconfig_due_to_wowlan)
2182 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2184 list_for_each_entry(sdata, &local->interfaces, list) {
2185 if (!ieee80211_sdata_running(sdata))
2187 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2188 ieee80211_sta_restart(sdata);
2191 mod_timer(&local->sta_cleanup, jiffies + 1);
2199 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2201 struct ieee80211_sub_if_data *sdata;
2202 struct ieee80211_local *local;
2203 struct ieee80211_key *key;
2208 sdata = vif_to_sdata(vif);
2209 local = sdata->local;
2211 if (WARN_ON(!local->resuming))
2214 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2217 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2219 mutex_lock(&local->key_mtx);
2220 list_for_each_entry(key, &sdata->key_list, list)
2221 key->flags |= KEY_FLAG_TAINTED;
2222 mutex_unlock(&local->key_mtx);
2224 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2226 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2228 struct ieee80211_local *local = sdata->local;
2229 struct ieee80211_chanctx_conf *chanctx_conf;
2230 struct ieee80211_chanctx *chanctx;
2232 mutex_lock(&local->chanctx_mtx);
2234 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2235 lockdep_is_held(&local->chanctx_mtx));
2238 * This function can be called from a work, thus it may be possible
2239 * that the chanctx_conf is removed (due to a disconnection, for
2241 * So nothing should be done in such case.
2246 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2247 ieee80211_recalc_smps_chanctx(local, chanctx);
2249 mutex_unlock(&local->chanctx_mtx);
2252 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2254 struct ieee80211_local *local = sdata->local;
2255 struct ieee80211_chanctx_conf *chanctx_conf;
2256 struct ieee80211_chanctx *chanctx;
2258 mutex_lock(&local->chanctx_mtx);
2260 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2261 lockdep_is_held(&local->chanctx_mtx));
2263 if (WARN_ON_ONCE(!chanctx_conf))
2266 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2267 ieee80211_recalc_chanctx_min_def(local, chanctx);
2269 mutex_unlock(&local->chanctx_mtx);
2272 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2274 size_t pos = offset;
2276 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2277 pos += 2 + ies[pos + 1];
2282 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2286 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2288 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2292 * Scale up threshold values before storing it, as the RSSI averaging
2293 * algorithm uses a scaled up value as well. Change this scaling
2294 * factor if the RSSI averaging algorithm changes.
2296 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2297 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2300 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2304 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2306 WARN_ON(rssi_min_thold == rssi_max_thold ||
2307 rssi_min_thold > rssi_max_thold);
2309 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2312 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2314 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2316 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2318 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2320 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2322 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2327 *pos++ = WLAN_EID_HT_CAPABILITY;
2328 *pos++ = sizeof(struct ieee80211_ht_cap);
2329 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2331 /* capability flags */
2332 tmp = cpu_to_le16(cap);
2333 memcpy(pos, &tmp, sizeof(u16));
2336 /* AMPDU parameters */
2337 *pos++ = ht_cap->ampdu_factor |
2338 (ht_cap->ampdu_density <<
2339 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2342 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2343 pos += sizeof(ht_cap->mcs);
2345 /* extended capabilities */
2346 pos += sizeof(__le16);
2348 /* BF capabilities */
2349 pos += sizeof(__le32);
2351 /* antenna selection */
2357 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2362 *pos++ = WLAN_EID_VHT_CAPABILITY;
2363 *pos++ = sizeof(struct ieee80211_vht_cap);
2364 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2366 /* capability flags */
2367 tmp = cpu_to_le32(cap);
2368 memcpy(pos, &tmp, sizeof(u32));
2372 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2373 pos += sizeof(vht_cap->vht_mcs);
2378 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2379 const struct cfg80211_chan_def *chandef,
2380 u16 prot_mode, bool rifs_mode)
2382 struct ieee80211_ht_operation *ht_oper;
2383 /* Build HT Information */
2384 *pos++ = WLAN_EID_HT_OPERATION;
2385 *pos++ = sizeof(struct ieee80211_ht_operation);
2386 ht_oper = (struct ieee80211_ht_operation *)pos;
2387 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2388 chandef->chan->center_freq);
2389 switch (chandef->width) {
2390 case NL80211_CHAN_WIDTH_160:
2391 case NL80211_CHAN_WIDTH_80P80:
2392 case NL80211_CHAN_WIDTH_80:
2393 case NL80211_CHAN_WIDTH_40:
2394 if (chandef->center_freq1 > chandef->chan->center_freq)
2395 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2397 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2400 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2403 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2404 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2405 chandef->width != NL80211_CHAN_WIDTH_20)
2406 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2409 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2411 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2412 ht_oper->stbc_param = 0x0000;
2414 /* It seems that Basic MCS set and Supported MCS set
2415 are identical for the first 10 bytes */
2416 memset(&ht_oper->basic_set, 0, 16);
2417 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2419 return pos + sizeof(struct ieee80211_ht_operation);
2422 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2423 const struct cfg80211_chan_def *chandef)
2425 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2426 *pos++ = 3; /* IE length */
2427 /* New channel width */
2428 switch (chandef->width) {
2429 case NL80211_CHAN_WIDTH_80:
2430 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2432 case NL80211_CHAN_WIDTH_160:
2433 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2435 case NL80211_CHAN_WIDTH_80P80:
2436 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2439 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2442 /* new center frequency segment 0 */
2443 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2444 /* new center frequency segment 1 */
2445 if (chandef->center_freq2)
2446 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2451 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2452 const struct cfg80211_chan_def *chandef)
2454 struct ieee80211_vht_operation *vht_oper;
2456 *pos++ = WLAN_EID_VHT_OPERATION;
2457 *pos++ = sizeof(struct ieee80211_vht_operation);
2458 vht_oper = (struct ieee80211_vht_operation *)pos;
2459 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2460 chandef->center_freq1);
2461 if (chandef->center_freq2)
2462 vht_oper->center_freq_seg1_idx =
2463 ieee80211_frequency_to_channel(chandef->center_freq2);
2465 vht_oper->center_freq_seg1_idx = 0x00;
2467 switch (chandef->width) {
2468 case NL80211_CHAN_WIDTH_160:
2470 * Convert 160 MHz channel width to new style as interop
2473 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2474 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2475 if (chandef->chan->center_freq < chandef->center_freq1)
2476 vht_oper->center_freq_seg0_idx -= 8;
2478 vht_oper->center_freq_seg0_idx += 8;
2480 case NL80211_CHAN_WIDTH_80P80:
2482 * Convert 80+80 MHz channel width to new style as interop
2485 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2487 case NL80211_CHAN_WIDTH_80:
2488 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2491 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2495 /* don't require special VHT peer rates */
2496 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2498 return pos + sizeof(struct ieee80211_vht_operation);
2501 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2502 struct cfg80211_chan_def *chandef)
2504 enum nl80211_channel_type channel_type;
2509 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2510 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2511 channel_type = NL80211_CHAN_HT20;
2513 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2514 channel_type = NL80211_CHAN_HT40PLUS;
2516 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2517 channel_type = NL80211_CHAN_HT40MINUS;
2520 channel_type = NL80211_CHAN_NO_HT;
2524 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2528 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2529 struct cfg80211_chan_def *chandef)
2531 struct cfg80211_chan_def new = *chandef;
2537 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2538 chandef->chan->band);
2539 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2540 chandef->chan->band);
2542 switch (oper->chan_width) {
2543 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2545 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2546 new.width = NL80211_CHAN_WIDTH_80;
2547 new.center_freq1 = cf1;
2548 /* If needed, adjust based on the newer interop workaround. */
2549 if (oper->center_freq_seg1_idx) {
2552 diff = abs(oper->center_freq_seg1_idx -
2553 oper->center_freq_seg0_idx);
2555 new.width = NL80211_CHAN_WIDTH_160;
2556 new.center_freq1 = cf2;
2557 } else if (diff > 8) {
2558 new.width = NL80211_CHAN_WIDTH_80P80;
2559 new.center_freq2 = cf2;
2563 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2564 new.width = NL80211_CHAN_WIDTH_160;
2565 new.center_freq1 = cf1;
2567 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2568 new.width = NL80211_CHAN_WIDTH_80P80;
2569 new.center_freq1 = cf1;
2570 new.center_freq2 = cf2;
2576 if (!cfg80211_chandef_valid(&new))
2583 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2584 const struct ieee80211_supported_band *sband,
2585 const u8 *srates, int srates_len, u32 *rates)
2587 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2588 int shift = ieee80211_chandef_get_shift(chandef);
2589 struct ieee80211_rate *br;
2590 int brate, rate, i, j, count = 0;
2594 for (i = 0; i < srates_len; i++) {
2595 rate = srates[i] & 0x7f;
2597 for (j = 0; j < sband->n_bitrates; j++) {
2598 br = &sband->bitrates[j];
2599 if ((rate_flags & br->flags) != rate_flags)
2602 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2603 if (brate == rate) {
2613 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2614 struct sk_buff *skb, bool need_basic,
2615 enum nl80211_band band)
2617 struct ieee80211_local *local = sdata->local;
2618 struct ieee80211_supported_band *sband;
2621 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2624 shift = ieee80211_vif_get_shift(&sdata->vif);
2625 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2626 sband = local->hw.wiphy->bands[band];
2628 for (i = 0; i < sband->n_bitrates; i++) {
2629 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2636 if (skb_tailroom(skb) < rates + 2)
2639 pos = skb_put(skb, rates + 2);
2640 *pos++ = WLAN_EID_SUPP_RATES;
2642 for (i = 0; i < rates; i++) {
2644 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2647 if (need_basic && basic_rates & BIT(i))
2649 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2651 *pos++ = basic | (u8) rate;
2657 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2658 struct sk_buff *skb, bool need_basic,
2659 enum nl80211_band band)
2661 struct ieee80211_local *local = sdata->local;
2662 struct ieee80211_supported_band *sband;
2664 u8 i, exrates, *pos;
2665 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2668 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2669 shift = ieee80211_vif_get_shift(&sdata->vif);
2671 sband = local->hw.wiphy->bands[band];
2673 for (i = 0; i < sband->n_bitrates; i++) {
2674 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2684 if (skb_tailroom(skb) < exrates + 2)
2688 pos = skb_put(skb, exrates + 2);
2689 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2691 for (i = 8; i < sband->n_bitrates; i++) {
2693 if ((rate_flags & sband->bitrates[i].flags)
2696 if (need_basic && basic_rates & BIT(i))
2698 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2700 *pos++ = basic | (u8) rate;
2706 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2708 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2709 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2711 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2712 /* non-managed type inferfaces */
2715 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2717 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2719 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2724 /* TODO: consider rx_highest */
2726 if (mcs->rx_mask[3])
2728 if (mcs->rx_mask[2])
2730 if (mcs->rx_mask[1])
2736 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2737 * @local: mac80211 hw info struct
2738 * @status: RX status
2739 * @mpdu_len: total MPDU length (including FCS)
2740 * @mpdu_offset: offset into MPDU to calculate timestamp at
2742 * This function calculates the RX timestamp at the given MPDU offset, taking
2743 * into account what the RX timestamp was. An offset of 0 will just normalize
2744 * the timestamp to TSF at beginning of MPDU reception.
2746 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2747 struct ieee80211_rx_status *status,
2748 unsigned int mpdu_len,
2749 unsigned int mpdu_offset)
2751 u64 ts = status->mactime;
2752 struct rate_info ri;
2755 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2758 memset(&ri, 0, sizeof(ri));
2760 /* Fill cfg80211 rate info */
2761 switch (status->encoding) {
2763 ri.mcs = status->rate_idx;
2764 ri.flags |= RATE_INFO_FLAGS_MCS;
2766 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2767 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2770 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2771 ri.mcs = status->rate_idx;
2772 ri.nss = status->nss;
2774 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2775 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2780 case RX_ENC_LEGACY: {
2781 struct ieee80211_supported_band *sband;
2787 switch (status->bw) {
2788 case RATE_INFO_BW_10:
2791 case RATE_INFO_BW_5:
2796 sband = local->hw.wiphy->bands[status->band];
2797 bitrate = sband->bitrates[status->rate_idx].bitrate;
2798 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2800 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2801 /* TODO: handle HT/VHT preambles */
2802 if (status->band == NL80211_BAND_5GHZ) {
2805 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2815 rate = cfg80211_calculate_bitrate(&ri);
2816 if (WARN_ONCE(!rate,
2817 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2818 (unsigned long long)status->flag, status->rate_idx,
2822 /* rewind from end of MPDU */
2823 if (status->flag & RX_FLAG_MACTIME_END)
2824 ts -= mpdu_len * 8 * 10 / rate;
2826 ts += mpdu_offset * 8 * 10 / rate;
2831 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2833 struct ieee80211_sub_if_data *sdata;
2834 struct cfg80211_chan_def chandef;
2836 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2839 mutex_lock(&local->mtx);
2840 list_for_each_entry(sdata, &local->interfaces, list) {
2841 /* it might be waiting for the local->mtx, but then
2842 * by the time it gets it, sdata->wdev.cac_started
2843 * will no longer be true
2845 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2847 if (sdata->wdev.cac_started) {
2848 chandef = sdata->vif.bss_conf.chandef;
2849 ieee80211_vif_release_channel(sdata);
2850 cfg80211_cac_event(sdata->dev,
2852 NL80211_RADAR_CAC_ABORTED,
2856 mutex_unlock(&local->mtx);
2859 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2861 struct ieee80211_local *local =
2862 container_of(work, struct ieee80211_local, radar_detected_work);
2863 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2864 struct ieee80211_chanctx *ctx;
2865 int num_chanctx = 0;
2867 mutex_lock(&local->chanctx_mtx);
2868 list_for_each_entry(ctx, &local->chanctx_list, list) {
2869 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2873 chandef = ctx->conf.def;
2875 mutex_unlock(&local->chanctx_mtx);
2878 ieee80211_dfs_cac_cancel(local);
2881 if (num_chanctx > 1)
2882 /* XXX: multi-channel is not supported yet */
2885 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2888 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2890 struct ieee80211_local *local = hw_to_local(hw);
2892 trace_api_radar_detected(local);
2894 schedule_work(&local->radar_detected_work);
2896 EXPORT_SYMBOL(ieee80211_radar_detected);
2898 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2904 case NL80211_CHAN_WIDTH_20:
2905 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2906 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2908 case NL80211_CHAN_WIDTH_40:
2909 c->width = NL80211_CHAN_WIDTH_20;
2910 c->center_freq1 = c->chan->center_freq;
2911 ret = IEEE80211_STA_DISABLE_40MHZ |
2912 IEEE80211_STA_DISABLE_VHT;
2914 case NL80211_CHAN_WIDTH_80:
2915 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2919 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2920 c->width = NL80211_CHAN_WIDTH_40;
2921 ret = IEEE80211_STA_DISABLE_VHT;
2923 case NL80211_CHAN_WIDTH_80P80:
2924 c->center_freq2 = 0;
2925 c->width = NL80211_CHAN_WIDTH_80;
2926 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2927 IEEE80211_STA_DISABLE_160MHZ;
2929 case NL80211_CHAN_WIDTH_160:
2931 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2934 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2935 c->width = NL80211_CHAN_WIDTH_80;
2936 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2937 IEEE80211_STA_DISABLE_160MHZ;
2940 case NL80211_CHAN_WIDTH_20_NOHT:
2942 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2943 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2945 case NL80211_CHAN_WIDTH_5:
2946 case NL80211_CHAN_WIDTH_10:
2949 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2953 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2959 * Returns true if smps_mode_new is strictly more restrictive than
2962 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2963 enum ieee80211_smps_mode smps_mode_new)
2965 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2966 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2969 switch (smps_mode_old) {
2970 case IEEE80211_SMPS_STATIC:
2972 case IEEE80211_SMPS_DYNAMIC:
2973 return smps_mode_new == IEEE80211_SMPS_STATIC;
2974 case IEEE80211_SMPS_OFF:
2975 return smps_mode_new != IEEE80211_SMPS_OFF;
2983 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2984 struct cfg80211_csa_settings *csa_settings)
2986 struct sk_buff *skb;
2987 struct ieee80211_mgmt *mgmt;
2988 struct ieee80211_local *local = sdata->local;
2990 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2991 sizeof(mgmt->u.action.u.chan_switch);
2994 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2995 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2998 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2999 5 + /* channel switch announcement element */
3000 3 + /* secondary channel offset element */
3001 5 + /* wide bandwidth channel switch announcement */
3002 8); /* mesh channel switch parameters element */
3006 skb_reserve(skb, local->tx_headroom);
3007 mgmt = skb_put_zero(skb, hdr_len);
3008 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3009 IEEE80211_STYPE_ACTION);
3011 eth_broadcast_addr(mgmt->da);
3012 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3013 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3014 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3016 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3017 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3019 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3020 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3021 pos = skb_put(skb, 5);
3022 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3023 *pos++ = 3; /* IE length */
3024 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3025 freq = csa_settings->chandef.chan->center_freq;
3026 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3027 *pos++ = csa_settings->count; /* count */
3029 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3030 enum nl80211_channel_type ch_type;
3033 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3034 *pos++ = 1; /* IE length */
3035 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3036 if (ch_type == NL80211_CHAN_HT40PLUS)
3037 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3039 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3042 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3043 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3046 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3047 *pos++ = 6; /* IE length */
3048 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3049 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3050 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3051 *pos++ |= csa_settings->block_tx ?
3052 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3053 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3055 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3059 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3060 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3061 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3063 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3066 ieee80211_tx_skb(sdata, skb);
3070 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3072 return !(cs == NULL || cs->cipher == 0 ||
3073 cs->hdr_len < cs->pn_len + cs->pn_off ||
3074 cs->hdr_len <= cs->key_idx_off ||
3075 cs->key_idx_shift > 7 ||
3076 cs->key_idx_mask == 0);
3079 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3083 /* Ensure we have enough iftype bitmap space for all iftype values */
3084 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3086 for (i = 0; i < n; i++)
3087 if (!ieee80211_cs_valid(&cs[i]))
3093 const struct ieee80211_cipher_scheme *
3094 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3095 enum nl80211_iftype iftype)
3097 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3098 int n = local->hw.n_cipher_schemes;
3100 const struct ieee80211_cipher_scheme *cs = NULL;
3102 for (i = 0; i < n; i++) {
3103 if (l[i].cipher == cipher) {
3109 if (!cs || !(cs->iftype & BIT(iftype)))
3115 int ieee80211_cs_headroom(struct ieee80211_local *local,
3116 struct cfg80211_crypto_settings *crypto,
3117 enum nl80211_iftype iftype)
3119 const struct ieee80211_cipher_scheme *cs;
3120 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3123 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3124 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3127 if (cs && headroom < cs->hdr_len)
3128 headroom = cs->hdr_len;
3131 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3132 if (cs && headroom < cs->hdr_len)
3133 headroom = cs->hdr_len;
3139 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3141 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3148 if (data->count[i] == 1)
3151 if (data->desc[i].interval == 0)
3154 /* End time is in the past, check for repetitions */
3155 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3156 if (data->count[i] < 255) {
3157 if (data->count[i] <= skip) {
3162 data->count[i] -= skip;
3165 data->desc[i].start += skip * data->desc[i].interval;
3171 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3177 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3180 if (!data->count[i])
3183 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3186 cur = data->desc[i].start - tsf;
3190 cur = data->desc[i].start + data->desc[i].duration - tsf;
3199 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3204 * arbitrary limit, used to avoid infinite loops when combined NoA
3205 * descriptors cover the full time period.
3209 ieee80211_extend_absent_time(data, tsf, &offset);
3211 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3215 } while (tries < max_tries);
3220 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3222 u32 next_offset = BIT(31) - 1;
3226 data->has_next_tsf = false;
3227 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3230 if (!data->count[i])
3233 ieee80211_extend_noa_desc(data, tsf, i);
3234 start = data->desc[i].start - tsf;
3236 data->absent |= BIT(i);
3238 if (next_offset > start)
3239 next_offset = start;
3241 data->has_next_tsf = true;
3245 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3247 data->next_tsf = tsf + next_offset;
3249 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3251 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3252 struct ieee80211_noa_data *data, u32 tsf)
3257 memset(data, 0, sizeof(*data));
3259 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3260 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3262 if (!desc->count || !desc->duration)
3265 data->count[i] = desc->count;
3266 data->desc[i].start = le32_to_cpu(desc->start_time);
3267 data->desc[i].duration = le32_to_cpu(desc->duration);
3268 data->desc[i].interval = le32_to_cpu(desc->interval);
3270 if (data->count[i] > 1 &&
3271 data->desc[i].interval < data->desc[i].duration)
3274 ieee80211_extend_noa_desc(data, tsf, i);
3279 ieee80211_update_p2p_noa(data, tsf);
3283 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3285 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3286 struct ieee80211_sub_if_data *sdata)
3288 u64 tsf = drv_get_tsf(local, sdata);
3290 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3291 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3295 if (tsf == -1ULL || !beacon_int || !dtim_period)
3298 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3299 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3303 ps = &sdata->bss->ps;
3304 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3305 ps = &sdata->u.mesh.ps;
3311 * actually finds last dtim_count, mac80211 will update in
3312 * __beacon_add_tim().
3313 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3315 do_div(tsf, beacon_int);
3316 bcns_from_dtim = do_div(tsf, dtim_period);
3317 /* just had a DTIM */
3318 if (!bcns_from_dtim)
3321 dtim_count = dtim_period - bcns_from_dtim;
3323 ps->dtim_count = dtim_count;
3326 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3327 struct ieee80211_chanctx *ctx)
3329 struct ieee80211_sub_if_data *sdata;
3330 u8 radar_detect = 0;
3332 lockdep_assert_held(&local->chanctx_mtx);
3334 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3337 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3338 if (sdata->reserved_radar_required)
3339 radar_detect |= BIT(sdata->reserved_chandef.width);
3342 * An in-place reservation context should not have any assigned vifs
3343 * until it replaces the other context.
3345 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3346 !list_empty(&ctx->assigned_vifs));
3348 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3349 if (sdata->radar_required)
3350 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3352 return radar_detect;
3355 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3356 const struct cfg80211_chan_def *chandef,
3357 enum ieee80211_chanctx_mode chanmode,
3360 struct ieee80211_local *local = sdata->local;
3361 struct ieee80211_sub_if_data *sdata_iter;
3362 enum nl80211_iftype iftype = sdata->wdev.iftype;
3363 struct ieee80211_chanctx *ctx;
3365 struct iface_combination_params params = {
3366 .radar_detect = radar_detect,
3369 lockdep_assert_held(&local->chanctx_mtx);
3371 if (WARN_ON(hweight32(radar_detect) > 1))
3374 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3378 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3381 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3382 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3384 * always passing this is harmless, since it'll be the
3385 * same value that cfg80211 finds if it finds the same
3386 * interface ... and that's always allowed
3388 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3391 /* Always allow software iftypes */
3392 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3399 params.num_different_channels = 1;
3401 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3402 params.iftype_num[iftype] = 1;
3404 list_for_each_entry(ctx, &local->chanctx_list, list) {
3405 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3407 params.radar_detect |=
3408 ieee80211_chanctx_radar_detect(local, ctx);
3409 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3410 params.num_different_channels++;
3413 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3414 cfg80211_chandef_compatible(chandef,
3417 params.num_different_channels++;
3420 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3421 struct wireless_dev *wdev_iter;
3423 wdev_iter = &sdata_iter->wdev;
3425 if (sdata_iter == sdata ||
3426 !ieee80211_sdata_running(sdata_iter) ||
3427 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3430 params.iftype_num[wdev_iter->iftype]++;
3434 if (total == 1 && !params.radar_detect)
3437 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3441 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3444 u32 *max_num_different_channels = data;
3446 *max_num_different_channels = max(*max_num_different_channels,
3447 c->num_different_channels);
3450 int ieee80211_max_num_channels(struct ieee80211_local *local)
3452 struct ieee80211_sub_if_data *sdata;
3453 struct ieee80211_chanctx *ctx;
3454 u32 max_num_different_channels = 1;
3456 struct iface_combination_params params = {0};
3458 lockdep_assert_held(&local->chanctx_mtx);
3460 list_for_each_entry(ctx, &local->chanctx_list, list) {
3461 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3464 params.num_different_channels++;
3466 params.radar_detect |=
3467 ieee80211_chanctx_radar_detect(local, ctx);
3470 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3471 params.iftype_num[sdata->wdev.iftype]++;
3473 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3474 ieee80211_iter_max_chans,
3475 &max_num_different_channels);
3479 return max_num_different_channels;
3482 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3484 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3485 *buf++ = 7; /* len */
3486 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3489 *buf++ = 2; /* WME */
3490 *buf++ = 0; /* WME info */
3491 *buf++ = 1; /* WME ver */
3492 *buf++ = qosinfo; /* U-APSD no in use */
3497 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3498 unsigned long *frame_cnt,
3499 unsigned long *byte_cnt)
3501 struct txq_info *txqi = to_txq_info(txq);
3502 u32 frag_cnt = 0, frag_bytes = 0;
3503 struct sk_buff *skb;
3505 skb_queue_walk(&txqi->frags, skb) {
3507 frag_bytes += skb->len;
3511 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3514 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3516 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3518 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3519 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3520 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3521 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3522 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK