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>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 struct ieee80211_local *local;
44 local = wiphy_priv(wiphy);
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
50 enum nl80211_iftype type)
52 __le16 fc = hdr->frame_control;
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
58 if (ieee80211_is_data(fc)) {
59 if (len < 24) /* drop incorrect hdr len (data) */
62 if (ieee80211_has_a4(fc))
64 if (ieee80211_has_tods(fc))
66 if (ieee80211_has_fromds(fc))
72 if (ieee80211_is_mgmt(fc)) {
73 if (len < 24) /* drop incorrect hdr len (mgmt) */
78 if (ieee80211_is_ctl(fc)) {
79 if (ieee80211_is_pspoll(fc))
82 if (ieee80211_is_back_req(fc)) {
84 case NL80211_IFTYPE_STATION:
86 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
90 break; /* fall through to the return */
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
101 struct ieee80211_hdr *hdr;
103 skb_queue_walk(&tx->skbs, skb) {
104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
109 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
110 int rate, int erp, int short_preamble,
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
127 if (band == IEEE80211_BAND_5GHZ || erp) {
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
141 dur = 16; /* SIFS + signal ext */
142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
176 /* Exported duration function for driver use */
177 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
179 enum ieee80211_band band,
181 struct ieee80211_rate *rate)
183 struct ieee80211_sub_if_data *sdata;
186 bool short_preamble = false;
190 sdata = vif_to_sdata(vif);
191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
194 shift = ieee80211_vif_get_shift(vif);
197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
198 short_preamble, shift);
200 return cpu_to_le16(dur);
202 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
204 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
206 const struct ieee80211_tx_info *frame_txctl)
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
210 struct ieee80211_sub_if_data *sdata;
212 int erp, shift = 0, bitrate;
214 struct ieee80211_supported_band *sband;
216 sband = local->hw.wiphy->bands[frame_txctl->band];
218 short_preamble = false;
220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
224 sdata = vif_to_sdata(vif);
225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
228 shift = ieee80211_vif_get_shift(vif);
231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
236 /* Data frame duration */
237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
238 erp, short_preamble, shift);
240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
241 erp, short_preamble, shift);
243 return cpu_to_le16(dur);
245 EXPORT_SYMBOL(ieee80211_rts_duration);
247 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
250 const struct ieee80211_tx_info *frame_txctl)
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
254 struct ieee80211_sub_if_data *sdata;
256 int erp, shift = 0, bitrate;
258 struct ieee80211_supported_band *sband;
260 sband = local->hw.wiphy->bands[frame_txctl->band];
262 short_preamble = false;
264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
267 sdata = vif_to_sdata(vif);
268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
271 shift = ieee80211_vif_get_shift(vif);
274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
276 /* Data frame duration */
277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
278 erp, short_preamble, shift);
279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
282 erp, short_preamble, shift);
285 return cpu_to_le16(dur);
287 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
289 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
291 struct ieee80211_sub_if_data *sdata;
292 int n_acs = IEEE80211_NUM_ACS;
294 if (local->hw.queues < IEEE80211_NUM_ACS)
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
307 for (ac = 0; ac < n_acs; ac++) {
308 int ac_queue = sdata->vif.hw_queue[ac];
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
319 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
322 struct ieee80211_local *local = hw_to_local(hw);
324 trace_wake_queue(local, queue, reason);
326 if (WARN_ON(queue >= hw->queues))
329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
338 if (skb_queue_empty(&local->pending[queue])) {
340 ieee80211_propagate_queue_wake(local, queue);
343 tasklet_schedule(&local->tx_pending_tasklet);
346 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
349 struct ieee80211_local *local = hw_to_local(hw);
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
357 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
362 EXPORT_SYMBOL(ieee80211_wake_queue);
364 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
367 struct ieee80211_local *local = hw_to_local(hw);
368 struct ieee80211_sub_if_data *sdata;
369 int n_acs = IEEE80211_NUM_ACS;
371 trace_stop_queue(local, queue, reason);
373 if (WARN_ON(queue >= hw->queues))
376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
379 __set_bit(reason, &local->queue_stop_reasons[queue]);
381 if (local->hw.queues < IEEE80211_NUM_ACS)
385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
391 for (ac = 0; ac < n_acs; ac++) {
392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
400 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
403 struct ieee80211_local *local = hw_to_local(hw);
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
411 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
416 EXPORT_SYMBOL(ieee80211_stop_queue);
418 void ieee80211_add_pending_skb(struct ieee80211_local *local,
421 struct ieee80211_hw *hw = &local->hw;
423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
424 int queue = info->hw_queue;
426 if (WARN_ON(!info->control.vif)) {
427 ieee80211_free_txskb(&local->hw, skb);
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
433 __skb_queue_tail(&local->pending[queue], skb);
434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
438 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
441 struct ieee80211_hw *hw = &local->hw;
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 while ((skb = skb_dequeue(skbs))) {
448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
450 if (WARN_ON(!info->control.vif)) {
451 ieee80211_free_txskb(&local->hw, skb);
455 queue = info->hw_queue;
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
460 __skb_queue_tail(&local->pending[queue], skb);
463 for (i = 0; i < hw->queues; i++)
464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
469 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
470 unsigned long queues,
471 enum queue_stop_reason reason)
473 struct ieee80211_local *local = hw_to_local(hw);
477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
479 for_each_set_bit(i, &queues, hw->queues)
480 __ieee80211_stop_queue(hw, i, reason);
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
485 void ieee80211_stop_queues(struct ieee80211_hw *hw)
487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
490 EXPORT_SYMBOL(ieee80211_stop_queues);
492 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
494 struct ieee80211_local *local = hw_to_local(hw);
498 if (WARN_ON(queue >= hw->queues))
501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
507 EXPORT_SYMBOL(ieee80211_queue_stopped);
509 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
510 unsigned long queues,
511 enum queue_stop_reason reason)
513 struct ieee80211_local *local = hw_to_local(hw);
517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
519 for_each_set_bit(i, &queues, hw->queues)
520 __ieee80211_wake_queue(hw, i, reason);
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
525 void ieee80211_wake_queues(struct ieee80211_hw *hw)
527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
530 EXPORT_SYMBOL(ieee80211_wake_queues);
532 void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
537 if (!local->ops->flush)
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
551 queues = BIT(local->hw.queues) - 1;
554 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
557 drv_flush(local, sdata, queues, false);
559 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
563 static void __iterate_active_interfaces(struct ieee80211_local *local,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
569 struct ieee80211_sub_if_data *sdata;
571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
572 switch (sdata->vif.type) {
573 case NL80211_IFTYPE_MONITOR:
574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
577 case NL80211_IFTYPE_AP_VLAN:
582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
585 if (ieee80211_sdata_running(sdata))
586 iterator(data, sdata->vif.addr,
590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
596 iterator(data, sdata->vif.addr, &sdata->vif);
599 void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
605 struct ieee80211_local *local = hw_to_local(hw);
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
609 mutex_unlock(&local->iflist_mtx);
611 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
613 void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw *hw, u32 iter_flags,
615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
619 struct ieee80211_local *local = hw_to_local(hw);
622 __iterate_active_interfaces(local, iter_flags, iterator, data);
625 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
627 void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
633 struct ieee80211_local *local = hw_to_local(hw);
637 __iterate_active_interfaces(local, iter_flags, iterator, data);
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
641 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
650 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
659 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
668 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
670 struct ieee80211_local *local = hw_to_local(hw);
672 if (!ieee80211_can_queue_work(local))
675 queue_work(local->workqueue, work);
677 EXPORT_SYMBOL(ieee80211_queue_work);
679 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
683 struct ieee80211_local *local = hw_to_local(hw);
685 if (!ieee80211_can_queue_work(local))
688 queue_delayed_work(local->workqueue, dwork, delay);
690 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
692 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
693 struct ieee802_11_elems *elems,
697 const u8 *pos = start;
698 bool calc_crc = filter != 0;
699 DECLARE_BITMAP(seen_elems, 256);
702 bitmap_zero(seen_elems, 256);
703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
709 bool elem_parse_failed;
716 elems->parse_error = true;
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
750 case WLAN_EID_CHAN_SWITCH_PARAM:
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
767 elem_parse_failed = false;
772 elems->ssid_len = elen;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
778 case WLAN_EID_DS_PARAMS:
780 elems->ds_params = pos;
782 elem_parse_failed = true;
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
789 elem_parse_failed = true;
791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
798 /* Microsoft OUI (00:50:F2) */
801 crc = crc32_be(crc, pos - 2, elen + 2);
803 if (elen >= 5 && pos[3] == 2) {
804 /* OUI Type 2 - WMM IE */
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
817 elems->rsn_len = elen;
819 case WLAN_EID_ERP_INFO:
821 elems->erp_info = pos;
823 elem_parse_failed = true;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
833 elem_parse_failed = true;
835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
839 elem_parse_failed = true;
841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
845 elem_parse_failed = true;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
851 elem_parse_failed = true;
853 case WLAN_EID_OPMODE_NOTIF:
855 elems->opmode_notif = pos;
857 elem_parse_failed = true;
859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
867 elem_parse_failed = true;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
873 case WLAN_EID_MESH_AWAKE_WINDOW:
875 elems->awake_window = (void *)pos;
879 elems->preq_len = elen;
883 elems->prep_len = elen;
887 elems->perr_len = elen;
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
893 elem_parse_failed = true;
895 case WLAN_EID_CHANNEL_SWITCH:
896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
900 elems->ch_switch_ie = (void *)pos;
902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
907 elems->ext_chansw_ie = (void *)pos;
909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
914 elems->sec_chan_offs = (void *)pos;
916 case WLAN_EID_CHAN_SWITCH_PARAM:
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
922 elems->mesh_chansw_params_ie = (void *)pos;
924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
930 elems->wide_bw_chansw_ie = (void *)pos;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
934 elem_parse_failed = true;
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
949 elem_parse_failed = true;
952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
956 case WLAN_EID_PWR_CONSTRAINT:
958 elem_parse_failed = true;
961 elems->pwr_constr_elem = pos;
963 case WLAN_EID_TIMEOUT_INTERVAL:
964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
967 elem_parse_failed = true;
973 if (elem_parse_failed)
974 elems->parse_error = true;
976 __set_bit(id, seen_elems);
983 elems->parse_error = true;
988 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
993 struct ieee80211_chanctx_conf *chanctx_conf;
995 bool use_11b, enable_qos;
998 if (!local->ops->conf_tx)
1001 if (local->hw.queues < IEEE80211_NUM_ACS)
1004 memset(&qparam, 0, sizeof(qparam));
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
1009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1043 /* never happens but let's not leave undefined */
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1055 qparam.txop = 6016/32;
1057 qparam.txop = 3008/32;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1064 qparam.txop = 3264/32;
1066 qparam.txop = 1504/32;
1072 qparam.uapsd = false;
1074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
1078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1080 sdata->vif.bss_conf.qos = enable_qos;
1082 ieee80211_bss_info_change_notify(sdata,
1087 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1088 u16 transaction, u16 auth_alg, u16 status,
1089 const u8 *extra, size_t extra_len, const u8 *da,
1090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1100 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1104 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1106 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1107 memset(mgmt, 0, 24 + 6);
1108 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1109 IEEE80211_STYPE_AUTH);
1110 memcpy(mgmt->da, da, ETH_ALEN);
1111 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1112 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1113 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1114 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1115 mgmt->u.auth.status_code = cpu_to_le16(status);
1117 memcpy(skb_put(skb, extra_len), extra, extra_len);
1119 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1120 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1121 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1125 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1127 ieee80211_tx_skb(sdata, skb);
1130 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1131 const u8 *bssid, u16 stype, u16 reason,
1132 bool send_frame, u8 *frame_buf)
1134 struct ieee80211_local *local = sdata->local;
1135 struct sk_buff *skb;
1136 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1140 mgmt->duration = 0; /* initialize only */
1141 mgmt->seq_ctrl = 0; /* initialize only */
1142 memcpy(mgmt->da, bssid, ETH_ALEN);
1143 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1144 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1145 /* u.deauth.reason_code == u.disassoc.reason_code */
1146 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1149 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1150 IEEE80211_DEAUTH_FRAME_LEN);
1154 skb_reserve(skb, local->hw.extra_tx_headroom);
1157 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1158 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1160 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1161 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1162 IEEE80211_SKB_CB(skb)->flags |=
1163 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1165 ieee80211_tx_skb(sdata, skb);
1169 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1170 size_t buffer_len, const u8 *ie, size_t ie_len,
1171 enum ieee80211_band band, u32 rate_mask,
1172 struct cfg80211_chan_def *chandef)
1174 struct ieee80211_supported_band *sband;
1175 u8 *pos = buffer, *end = buffer + buffer_len;
1176 size_t offset = 0, noffset;
1177 int supp_rates_len, i;
1184 sband = local->hw.wiphy->bands[band];
1185 if (WARN_ON_ONCE(!sband))
1188 rate_flags = ieee80211_chandef_rate_flags(chandef);
1189 shift = ieee80211_chandef_get_shift(chandef);
1192 for (i = 0; i < sband->n_bitrates; i++) {
1193 if ((BIT(i) & rate_mask) == 0)
1194 continue; /* skip rate */
1195 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1198 rates[num_rates++] =
1199 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1203 supp_rates_len = min_t(int, num_rates, 8);
1205 if (end - pos < 2 + supp_rates_len)
1207 *pos++ = WLAN_EID_SUPP_RATES;
1208 *pos++ = supp_rates_len;
1209 memcpy(pos, rates, supp_rates_len);
1210 pos += supp_rates_len;
1212 /* insert "request information" if in custom IEs */
1214 static const u8 before_extrates[] = {
1216 WLAN_EID_SUPP_RATES,
1219 noffset = ieee80211_ie_split(ie, ie_len,
1221 ARRAY_SIZE(before_extrates),
1223 if (end - pos < noffset - offset)
1225 memcpy(pos, ie + offset, noffset - offset);
1226 pos += noffset - offset;
1230 ext_rates_len = num_rates - supp_rates_len;
1231 if (ext_rates_len > 0) {
1232 if (end - pos < 2 + ext_rates_len)
1234 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1235 *pos++ = ext_rates_len;
1236 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1237 pos += ext_rates_len;
1240 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1243 *pos++ = WLAN_EID_DS_PARAMS;
1245 *pos++ = ieee80211_frequency_to_channel(
1246 chandef->chan->center_freq);
1249 /* insert custom IEs that go before HT */
1251 static const u8 before_ht[] = {
1253 WLAN_EID_SUPP_RATES,
1255 WLAN_EID_EXT_SUPP_RATES,
1257 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1259 noffset = ieee80211_ie_split(ie, ie_len,
1260 before_ht, ARRAY_SIZE(before_ht),
1262 if (end - pos < noffset - offset)
1264 memcpy(pos, ie + offset, noffset - offset);
1265 pos += noffset - offset;
1269 if (sband->ht_cap.ht_supported) {
1270 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1272 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1277 * If adding more here, adjust code in main.c
1278 * that calculates local->scan_ies_len.
1281 /* insert custom IEs that go before VHT */
1283 static const u8 before_vht[] = {
1285 WLAN_EID_SUPP_RATES,
1287 WLAN_EID_EXT_SUPP_RATES,
1289 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1290 WLAN_EID_HT_CAPABILITY,
1291 WLAN_EID_BSS_COEX_2040,
1292 WLAN_EID_EXT_CAPABILITY,
1294 WLAN_EID_CHANNEL_USAGE,
1295 WLAN_EID_INTERWORKING,
1296 /* mesh ID can't happen here */
1297 /* 60 GHz can't happen here right now */
1299 noffset = ieee80211_ie_split(ie, ie_len,
1300 before_vht, ARRAY_SIZE(before_vht),
1302 if (end - pos < noffset - offset)
1304 memcpy(pos, ie + offset, noffset - offset);
1305 pos += noffset - offset;
1309 if (sband->vht_cap.vht_supported) {
1310 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1312 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1313 sband->vht_cap.cap);
1316 /* add any remaining custom IEs */
1319 if (end - pos < noffset - offset)
1321 memcpy(pos, ie + offset, noffset - offset);
1322 pos += noffset - offset;
1325 return pos - buffer;
1327 WARN_ONCE(1, "not enough space for preq IEs\n");
1328 return pos - buffer;
1331 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1332 u8 *dst, u32 ratemask,
1333 struct ieee80211_channel *chan,
1334 const u8 *ssid, size_t ssid_len,
1335 const u8 *ie, size_t ie_len,
1338 struct ieee80211_local *local = sdata->local;
1339 struct cfg80211_chan_def chandef;
1340 struct sk_buff *skb;
1341 struct ieee80211_mgmt *mgmt;
1345 * Do not send DS Channel parameter for directed probe requests
1346 * in order to maximize the chance that we get a response. Some
1347 * badly-behaved APs don't respond when this parameter is included.
1349 chandef.width = sdata->vif.bss_conf.chandef.width;
1351 chandef.chan = NULL;
1353 chandef.chan = chan;
1355 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1356 ssid, ssid_len, 100 + ie_len);
1360 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1362 ie, ie_len, chan->band,
1363 ratemask, &chandef);
1364 skb_put(skb, ies_len);
1367 mgmt = (struct ieee80211_mgmt *) skb->data;
1368 memcpy(mgmt->da, dst, ETH_ALEN);
1369 memcpy(mgmt->bssid, dst, ETH_ALEN);
1372 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1377 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1378 const u8 *ssid, size_t ssid_len,
1379 const u8 *ie, size_t ie_len,
1380 u32 ratemask, bool directed, u32 tx_flags,
1381 struct ieee80211_channel *channel, bool scan)
1383 struct sk_buff *skb;
1385 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1387 ie, ie_len, directed);
1389 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1391 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1393 ieee80211_tx_skb(sdata, skb);
1397 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1398 struct ieee802_11_elems *elems,
1399 enum ieee80211_band band, u32 *basic_rates)
1401 struct ieee80211_supported_band *sband;
1403 u32 supp_rates, rate_flags;
1405 sband = sdata->local->hw.wiphy->bands[band];
1407 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1408 shift = ieee80211_vif_get_shift(&sdata->vif);
1410 if (WARN_ON(!sband))
1413 num_rates = sband->n_bitrates;
1415 for (i = 0; i < elems->supp_rates_len +
1416 elems->ext_supp_rates_len; i++) {
1420 if (i < elems->supp_rates_len)
1421 rate = elems->supp_rates[i];
1422 else if (elems->ext_supp_rates)
1423 rate = elems->ext_supp_rates
1424 [i - elems->supp_rates_len];
1425 own_rate = 5 * (rate & 0x7f);
1426 is_basic = !!(rate & 0x80);
1428 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1431 for (j = 0; j < num_rates; j++) {
1433 if ((rate_flags & sband->bitrates[j].flags)
1437 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1440 if (brate == own_rate) {
1441 supp_rates |= BIT(j);
1442 if (basic_rates && is_basic)
1443 *basic_rates |= BIT(j);
1450 void ieee80211_stop_device(struct ieee80211_local *local)
1452 ieee80211_led_radio(local, false);
1453 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1455 cancel_work_sync(&local->reconfig_filter);
1457 flush_workqueue(local->workqueue);
1461 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1463 struct ieee80211_sub_if_data *sdata;
1464 struct ieee80211_chanctx *ctx;
1467 * We get here if during resume the device can't be restarted properly.
1468 * We might also get here if this happens during HW reset, which is a
1469 * slightly different situation and we need to drop all connections in
1472 * Ask cfg80211 to turn off all interfaces, this will result in more
1473 * warnings but at least we'll then get into a clean stopped state.
1476 local->resuming = false;
1477 local->suspended = false;
1478 local->started = false;
1480 /* scheduled scan clearly can't be running any more, but tell
1481 * cfg80211 and clear local state
1483 ieee80211_sched_scan_end(local);
1485 list_for_each_entry(sdata, &local->interfaces, list)
1486 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1488 /* Mark channel contexts as not being in the driver any more to avoid
1489 * removing them from the driver during the shutdown process...
1491 mutex_lock(&local->chanctx_mtx);
1492 list_for_each_entry(ctx, &local->chanctx_list, list)
1493 ctx->driver_present = false;
1494 mutex_unlock(&local->chanctx_mtx);
1496 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1499 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1500 struct ieee80211_sub_if_data *sdata)
1502 struct ieee80211_chanctx_conf *conf;
1503 struct ieee80211_chanctx *ctx;
1505 if (!local->use_chanctx)
1508 mutex_lock(&local->chanctx_mtx);
1509 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1510 lockdep_is_held(&local->chanctx_mtx));
1512 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1513 drv_assign_vif_chanctx(local, sdata, ctx);
1515 mutex_unlock(&local->chanctx_mtx);
1518 int ieee80211_reconfig(struct ieee80211_local *local)
1520 struct ieee80211_hw *hw = &local->hw;
1521 struct ieee80211_sub_if_data *sdata;
1522 struct ieee80211_chanctx *ctx;
1523 struct sta_info *sta;
1525 bool reconfig_due_to_wowlan = false;
1526 struct ieee80211_sub_if_data *sched_scan_sdata;
1527 bool sched_scan_stopped = false;
1530 if (local->suspended)
1531 local->resuming = true;
1533 if (local->wowlan) {
1534 res = drv_resume(local);
1535 local->wowlan = false;
1537 local->resuming = false;
1544 * res is 1, which means the driver requested
1545 * to go through a regular reset on wakeup.
1547 reconfig_due_to_wowlan = true;
1550 /* everything else happens only if HW was up & running */
1551 if (!local->open_count)
1555 * Upon resume hardware can sometimes be goofy due to
1556 * various platform / driver / bus issues, so restarting
1557 * the device may at times not work immediately. Propagate
1560 res = drv_start(local);
1562 if (local->suspended)
1563 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1565 WARN(1, "Hardware became unavailable during restart.\n");
1566 ieee80211_handle_reconfig_failure(local);
1570 /* setup fragmentation threshold */
1571 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1573 /* setup RTS threshold */
1574 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1576 /* reset coverage class */
1577 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1579 ieee80211_led_radio(local, true);
1580 ieee80211_mod_tpt_led_trig(local,
1581 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1583 /* add interfaces */
1584 sdata = rtnl_dereference(local->monitor_sdata);
1586 /* in HW restart it exists already */
1587 WARN_ON(local->resuming);
1588 res = drv_add_interface(local, sdata);
1590 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1596 list_for_each_entry(sdata, &local->interfaces, list) {
1597 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1598 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1599 ieee80211_sdata_running(sdata))
1600 res = drv_add_interface(local, sdata);
1603 /* add channel contexts */
1604 if (local->use_chanctx) {
1605 mutex_lock(&local->chanctx_mtx);
1606 list_for_each_entry(ctx, &local->chanctx_list, list)
1607 WARN_ON(drv_add_chanctx(local, ctx));
1608 mutex_unlock(&local->chanctx_mtx);
1610 list_for_each_entry(sdata, &local->interfaces, list) {
1611 if (!ieee80211_sdata_running(sdata))
1613 ieee80211_assign_chanctx(local, sdata);
1616 sdata = rtnl_dereference(local->monitor_sdata);
1617 if (sdata && ieee80211_sdata_running(sdata))
1618 ieee80211_assign_chanctx(local, sdata);
1622 mutex_lock(&local->sta_mtx);
1623 list_for_each_entry(sta, &local->sta_list, list) {
1624 enum ieee80211_sta_state state;
1629 /* AP-mode stations will be added later */
1630 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1633 for (state = IEEE80211_STA_NOTEXIST;
1634 state < sta->sta_state; state++)
1635 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1638 mutex_unlock(&local->sta_mtx);
1640 /* reconfigure tx conf */
1641 if (hw->queues >= IEEE80211_NUM_ACS) {
1642 list_for_each_entry(sdata, &local->interfaces, list) {
1643 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1644 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1645 !ieee80211_sdata_running(sdata))
1648 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1649 drv_conf_tx(local, sdata, i,
1650 &sdata->tx_conf[i]);
1654 /* reconfigure hardware */
1655 ieee80211_hw_config(local, ~0);
1657 ieee80211_configure_filter(local);
1659 /* Finally also reconfigure all the BSS information */
1660 list_for_each_entry(sdata, &local->interfaces, list) {
1663 if (!ieee80211_sdata_running(sdata))
1666 /* common change flags for all interface types */
1667 changed = BSS_CHANGED_ERP_CTS_PROT |
1668 BSS_CHANGED_ERP_PREAMBLE |
1669 BSS_CHANGED_ERP_SLOT |
1671 BSS_CHANGED_BASIC_RATES |
1672 BSS_CHANGED_BEACON_INT |
1677 BSS_CHANGED_TXPOWER;
1679 switch (sdata->vif.type) {
1680 case NL80211_IFTYPE_STATION:
1681 changed |= BSS_CHANGED_ASSOC |
1682 BSS_CHANGED_ARP_FILTER |
1685 /* Re-send beacon info report to the driver */
1686 if (sdata->u.mgd.have_beacon)
1687 changed |= BSS_CHANGED_BEACON_INFO;
1690 ieee80211_bss_info_change_notify(sdata, changed);
1691 sdata_unlock(sdata);
1693 case NL80211_IFTYPE_ADHOC:
1694 changed |= BSS_CHANGED_IBSS;
1696 case NL80211_IFTYPE_AP:
1697 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1699 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1700 changed |= BSS_CHANGED_AP_PROBE_RESP;
1702 if (rcu_access_pointer(sdata->u.ap.beacon))
1703 drv_start_ap(local, sdata);
1707 case NL80211_IFTYPE_MESH_POINT:
1708 if (sdata->vif.bss_conf.enable_beacon) {
1709 changed |= BSS_CHANGED_BEACON |
1710 BSS_CHANGED_BEACON_ENABLED;
1711 ieee80211_bss_info_change_notify(sdata, changed);
1714 case NL80211_IFTYPE_WDS:
1715 case NL80211_IFTYPE_AP_VLAN:
1716 case NL80211_IFTYPE_MONITOR:
1717 case NL80211_IFTYPE_P2P_DEVICE:
1720 case NL80211_IFTYPE_UNSPECIFIED:
1721 case NUM_NL80211_IFTYPES:
1722 case NL80211_IFTYPE_P2P_CLIENT:
1723 case NL80211_IFTYPE_P2P_GO:
1729 ieee80211_recalc_ps(local, -1);
1732 * The sta might be in psm against the ap (e.g. because
1733 * this was the state before a hw restart), so we
1734 * explicitly send a null packet in order to make sure
1735 * it'll sync against the ap (and get out of psm).
1737 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1738 list_for_each_entry(sdata, &local->interfaces, list) {
1739 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1741 if (!sdata->u.mgd.associated)
1744 ieee80211_send_nullfunc(local, sdata, 0);
1748 /* APs are now beaconing, add back stations */
1749 mutex_lock(&local->sta_mtx);
1750 list_for_each_entry(sta, &local->sta_list, list) {
1751 enum ieee80211_sta_state state;
1756 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1759 for (state = IEEE80211_STA_NOTEXIST;
1760 state < sta->sta_state; state++)
1761 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1764 mutex_unlock(&local->sta_mtx);
1767 list_for_each_entry(sdata, &local->interfaces, list)
1768 if (ieee80211_sdata_running(sdata))
1769 ieee80211_enable_keys(sdata);
1772 local->in_reconfig = false;
1775 if (local->monitors == local->open_count && local->monitors > 0)
1776 ieee80211_add_virtual_monitor(local);
1779 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1780 * sessions can be established after a resume.
1782 * Also tear down aggregation sessions since reconfiguring
1783 * them in a hardware restart scenario is not easily done
1784 * right now, and the hardware will have lost information
1785 * about the sessions, but we and the AP still think they
1786 * are active. This is really a workaround though.
1788 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1789 mutex_lock(&local->sta_mtx);
1791 list_for_each_entry(sta, &local->sta_list, list) {
1792 ieee80211_sta_tear_down_BA_sessions(
1793 sta, AGG_STOP_LOCAL_REQUEST);
1794 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1797 mutex_unlock(&local->sta_mtx);
1800 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1801 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1804 * Reconfigure sched scan if it was interrupted by FW restart or
1807 mutex_lock(&local->mtx);
1808 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1809 lockdep_is_held(&local->mtx));
1810 if (sched_scan_sdata && local->sched_scan_req)
1812 * Sched scan stopped, but we don't want to report it. Instead,
1813 * we're trying to reschedule.
1815 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1816 local->sched_scan_req))
1817 sched_scan_stopped = true;
1818 mutex_unlock(&local->mtx);
1820 if (sched_scan_stopped)
1821 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1824 * If this is for hw restart things are still running.
1825 * We may want to change that later, however.
1827 if (!local->suspended || reconfig_due_to_wowlan)
1828 drv_restart_complete(local);
1830 if (!local->suspended)
1834 /* first set suspended false, then resuming */
1835 local->suspended = false;
1837 local->resuming = false;
1839 list_for_each_entry(sdata, &local->interfaces, list) {
1840 if (!ieee80211_sdata_running(sdata))
1842 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1843 ieee80211_sta_restart(sdata);
1846 mod_timer(&local->sta_cleanup, jiffies + 1);
1854 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1856 struct ieee80211_sub_if_data *sdata;
1857 struct ieee80211_local *local;
1858 struct ieee80211_key *key;
1863 sdata = vif_to_sdata(vif);
1864 local = sdata->local;
1866 if (WARN_ON(!local->resuming))
1869 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1872 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1874 mutex_lock(&local->key_mtx);
1875 list_for_each_entry(key, &sdata->key_list, list)
1876 key->flags |= KEY_FLAG_TAINTED;
1877 mutex_unlock(&local->key_mtx);
1879 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1881 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1883 struct ieee80211_local *local = sdata->local;
1884 struct ieee80211_chanctx_conf *chanctx_conf;
1885 struct ieee80211_chanctx *chanctx;
1887 mutex_lock(&local->chanctx_mtx);
1889 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1890 lockdep_is_held(&local->chanctx_mtx));
1892 if (WARN_ON_ONCE(!chanctx_conf))
1895 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1896 ieee80211_recalc_smps_chanctx(local, chanctx);
1898 mutex_unlock(&local->chanctx_mtx);
1901 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1903 struct ieee80211_local *local = sdata->local;
1904 struct ieee80211_chanctx_conf *chanctx_conf;
1905 struct ieee80211_chanctx *chanctx;
1907 mutex_lock(&local->chanctx_mtx);
1909 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1910 lockdep_is_held(&local->chanctx_mtx));
1912 if (WARN_ON_ONCE(!chanctx_conf))
1915 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1916 ieee80211_recalc_chanctx_min_def(local, chanctx);
1918 mutex_unlock(&local->chanctx_mtx);
1921 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1925 for (i = 0; i < n_ids; i++)
1932 * ieee80211_ie_split - split an IE buffer according to ordering
1934 * @ies: the IE buffer
1935 * @ielen: the length of the IE buffer
1936 * @ids: an array with element IDs that are allowed before
1938 * @n_ids: the size of the element ID array
1939 * @offset: offset where to start splitting in the buffer
1941 * This function splits an IE buffer by updating the @offset
1942 * variable to point to the location where the buffer should be
1945 * It assumes that the given IE buffer is well-formed, this
1946 * has to be guaranteed by the caller!
1948 * It also assumes that the IEs in the buffer are ordered
1949 * correctly, if not the result of using this function will not
1950 * be ordered correctly either, i.e. it does no reordering.
1952 * The function returns the offset where the next part of the
1953 * buffer starts, which may be @ielen if the entire (remainder)
1954 * of the buffer should be used.
1956 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1957 const u8 *ids, int n_ids, size_t offset)
1959 size_t pos = offset;
1961 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1962 pos += 2 + ies[pos + 1];
1967 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1969 size_t pos = offset;
1971 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1972 pos += 2 + ies[pos + 1];
1977 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1981 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1983 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1987 * Scale up threshold values before storing it, as the RSSI averaging
1988 * algorithm uses a scaled up value as well. Change this scaling
1989 * factor if the RSSI averaging algorithm changes.
1991 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1992 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1995 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1999 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2001 WARN_ON(rssi_min_thold == rssi_max_thold ||
2002 rssi_min_thold > rssi_max_thold);
2004 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2007 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2009 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2011 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2013 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2015 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2017 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2022 *pos++ = WLAN_EID_HT_CAPABILITY;
2023 *pos++ = sizeof(struct ieee80211_ht_cap);
2024 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2026 /* capability flags */
2027 tmp = cpu_to_le16(cap);
2028 memcpy(pos, &tmp, sizeof(u16));
2031 /* AMPDU parameters */
2032 *pos++ = ht_cap->ampdu_factor |
2033 (ht_cap->ampdu_density <<
2034 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2037 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2038 pos += sizeof(ht_cap->mcs);
2040 /* extended capabilities */
2041 pos += sizeof(__le16);
2043 /* BF capabilities */
2044 pos += sizeof(__le32);
2046 /* antenna selection */
2052 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2057 *pos++ = WLAN_EID_VHT_CAPABILITY;
2058 *pos++ = sizeof(struct ieee80211_vht_cap);
2059 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2061 /* capability flags */
2062 tmp = cpu_to_le32(cap);
2063 memcpy(pos, &tmp, sizeof(u32));
2067 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2068 pos += sizeof(vht_cap->vht_mcs);
2073 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2074 const struct cfg80211_chan_def *chandef,
2077 struct ieee80211_ht_operation *ht_oper;
2078 /* Build HT Information */
2079 *pos++ = WLAN_EID_HT_OPERATION;
2080 *pos++ = sizeof(struct ieee80211_ht_operation);
2081 ht_oper = (struct ieee80211_ht_operation *)pos;
2082 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2083 chandef->chan->center_freq);
2084 switch (chandef->width) {
2085 case NL80211_CHAN_WIDTH_160:
2086 case NL80211_CHAN_WIDTH_80P80:
2087 case NL80211_CHAN_WIDTH_80:
2088 case NL80211_CHAN_WIDTH_40:
2089 if (chandef->center_freq1 > chandef->chan->center_freq)
2090 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2092 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2095 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2098 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2099 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2100 chandef->width != NL80211_CHAN_WIDTH_20)
2101 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2103 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2104 ht_oper->stbc_param = 0x0000;
2106 /* It seems that Basic MCS set and Supported MCS set
2107 are identical for the first 10 bytes */
2108 memset(&ht_oper->basic_set, 0, 16);
2109 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2111 return pos + sizeof(struct ieee80211_ht_operation);
2114 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2115 const struct ieee80211_ht_operation *ht_oper,
2116 struct cfg80211_chan_def *chandef)
2118 enum nl80211_channel_type channel_type;
2121 cfg80211_chandef_create(chandef, control_chan,
2122 NL80211_CHAN_NO_HT);
2126 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2127 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2128 channel_type = NL80211_CHAN_HT20;
2130 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2131 channel_type = NL80211_CHAN_HT40PLUS;
2133 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2134 channel_type = NL80211_CHAN_HT40MINUS;
2137 channel_type = NL80211_CHAN_NO_HT;
2140 cfg80211_chandef_create(chandef, control_chan, channel_type);
2143 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2144 const struct ieee80211_supported_band *sband,
2145 const u8 *srates, int srates_len, u32 *rates)
2147 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2148 int shift = ieee80211_chandef_get_shift(chandef);
2149 struct ieee80211_rate *br;
2150 int brate, rate, i, j, count = 0;
2154 for (i = 0; i < srates_len; i++) {
2155 rate = srates[i] & 0x7f;
2157 for (j = 0; j < sband->n_bitrates; j++) {
2158 br = &sband->bitrates[j];
2159 if ((rate_flags & br->flags) != rate_flags)
2162 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2163 if (brate == rate) {
2173 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2174 struct sk_buff *skb, bool need_basic,
2175 enum ieee80211_band band)
2177 struct ieee80211_local *local = sdata->local;
2178 struct ieee80211_supported_band *sband;
2181 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2184 shift = ieee80211_vif_get_shift(&sdata->vif);
2185 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2186 sband = local->hw.wiphy->bands[band];
2188 for (i = 0; i < sband->n_bitrates; i++) {
2189 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2196 if (skb_tailroom(skb) < rates + 2)
2199 pos = skb_put(skb, rates + 2);
2200 *pos++ = WLAN_EID_SUPP_RATES;
2202 for (i = 0; i < rates; i++) {
2204 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2207 if (need_basic && basic_rates & BIT(i))
2209 rate = sband->bitrates[i].bitrate;
2210 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2212 *pos++ = basic | (u8) rate;
2218 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2219 struct sk_buff *skb, bool need_basic,
2220 enum ieee80211_band band)
2222 struct ieee80211_local *local = sdata->local;
2223 struct ieee80211_supported_band *sband;
2225 u8 i, exrates, *pos;
2226 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2229 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2230 shift = ieee80211_vif_get_shift(&sdata->vif);
2232 sband = local->hw.wiphy->bands[band];
2234 for (i = 0; i < sband->n_bitrates; i++) {
2235 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2245 if (skb_tailroom(skb) < exrates + 2)
2249 pos = skb_put(skb, exrates + 2);
2250 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2252 for (i = 8; i < sband->n_bitrates; i++) {
2254 if ((rate_flags & sband->bitrates[i].flags)
2257 if (need_basic && basic_rates & BIT(i))
2259 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2261 *pos++ = basic | (u8) rate;
2267 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2269 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2270 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2272 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2273 /* non-managed type inferfaces */
2276 return ifmgd->ave_beacon_signal / 16;
2278 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2280 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2285 /* TODO: consider rx_highest */
2287 if (mcs->rx_mask[3])
2289 if (mcs->rx_mask[2])
2291 if (mcs->rx_mask[1])
2297 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2298 * @local: mac80211 hw info struct
2299 * @status: RX status
2300 * @mpdu_len: total MPDU length (including FCS)
2301 * @mpdu_offset: offset into MPDU to calculate timestamp at
2303 * This function calculates the RX timestamp at the given MPDU offset, taking
2304 * into account what the RX timestamp was. An offset of 0 will just normalize
2305 * the timestamp to TSF at beginning of MPDU reception.
2307 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2308 struct ieee80211_rx_status *status,
2309 unsigned int mpdu_len,
2310 unsigned int mpdu_offset)
2312 u64 ts = status->mactime;
2313 struct rate_info ri;
2316 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2319 memset(&ri, 0, sizeof(ri));
2321 /* Fill cfg80211 rate info */
2322 if (status->flag & RX_FLAG_HT) {
2323 ri.mcs = status->rate_idx;
2324 ri.flags |= RATE_INFO_FLAGS_MCS;
2325 if (status->flag & RX_FLAG_40MHZ)
2326 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2327 if (status->flag & RX_FLAG_SHORT_GI)
2328 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2329 } else if (status->flag & RX_FLAG_VHT) {
2330 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2331 ri.mcs = status->rate_idx;
2332 ri.nss = status->vht_nss;
2333 if (status->flag & RX_FLAG_40MHZ)
2334 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2335 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2336 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2337 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2338 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2339 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2340 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2341 if (status->flag & RX_FLAG_SHORT_GI)
2342 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2344 struct ieee80211_supported_band *sband;
2348 if (status->flag & RX_FLAG_10MHZ)
2350 if (status->flag & RX_FLAG_5MHZ)
2353 sband = local->hw.wiphy->bands[status->band];
2354 bitrate = sband->bitrates[status->rate_idx].bitrate;
2355 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2358 rate = cfg80211_calculate_bitrate(&ri);
2359 if (WARN_ONCE(!rate,
2360 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2361 status->flag, status->rate_idx, status->vht_nss))
2364 /* rewind from end of MPDU */
2365 if (status->flag & RX_FLAG_MACTIME_END)
2366 ts -= mpdu_len * 8 * 10 / rate;
2368 ts += mpdu_offset * 8 * 10 / rate;
2373 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2375 struct ieee80211_sub_if_data *sdata;
2376 struct cfg80211_chan_def chandef;
2378 mutex_lock(&local->mtx);
2379 mutex_lock(&local->iflist_mtx);
2380 list_for_each_entry(sdata, &local->interfaces, list) {
2381 /* it might be waiting for the local->mtx, but then
2382 * by the time it gets it, sdata->wdev.cac_started
2383 * will no longer be true
2385 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2387 if (sdata->wdev.cac_started) {
2388 chandef = sdata->vif.bss_conf.chandef;
2389 ieee80211_vif_release_channel(sdata);
2390 cfg80211_cac_event(sdata->dev,
2392 NL80211_RADAR_CAC_ABORTED,
2396 mutex_unlock(&local->iflist_mtx);
2397 mutex_unlock(&local->mtx);
2400 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2402 struct ieee80211_local *local =
2403 container_of(work, struct ieee80211_local, radar_detected_work);
2404 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2406 ieee80211_dfs_cac_cancel(local);
2408 if (local->use_chanctx)
2409 /* currently not handled */
2412 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2415 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2417 struct ieee80211_local *local = hw_to_local(hw);
2419 trace_api_radar_detected(local);
2421 ieee80211_queue_work(hw, &local->radar_detected_work);
2423 EXPORT_SYMBOL(ieee80211_radar_detected);
2425 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2431 case NL80211_CHAN_WIDTH_20:
2432 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2433 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2435 case NL80211_CHAN_WIDTH_40:
2436 c->width = NL80211_CHAN_WIDTH_20;
2437 c->center_freq1 = c->chan->center_freq;
2438 ret = IEEE80211_STA_DISABLE_40MHZ |
2439 IEEE80211_STA_DISABLE_VHT;
2441 case NL80211_CHAN_WIDTH_80:
2442 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2446 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2447 c->width = NL80211_CHAN_WIDTH_40;
2448 ret = IEEE80211_STA_DISABLE_VHT;
2450 case NL80211_CHAN_WIDTH_80P80:
2451 c->center_freq2 = 0;
2452 c->width = NL80211_CHAN_WIDTH_80;
2453 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2454 IEEE80211_STA_DISABLE_160MHZ;
2456 case NL80211_CHAN_WIDTH_160:
2458 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2461 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2462 c->width = NL80211_CHAN_WIDTH_80;
2463 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2464 IEEE80211_STA_DISABLE_160MHZ;
2467 case NL80211_CHAN_WIDTH_20_NOHT:
2469 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2470 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2472 case NL80211_CHAN_WIDTH_5:
2473 case NL80211_CHAN_WIDTH_10:
2476 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2480 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2486 * Returns true if smps_mode_new is strictly more restrictive than
2489 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2490 enum ieee80211_smps_mode smps_mode_new)
2492 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2493 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2496 switch (smps_mode_old) {
2497 case IEEE80211_SMPS_STATIC:
2499 case IEEE80211_SMPS_DYNAMIC:
2500 return smps_mode_new == IEEE80211_SMPS_STATIC;
2501 case IEEE80211_SMPS_OFF:
2502 return smps_mode_new != IEEE80211_SMPS_OFF;
2510 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2511 struct cfg80211_csa_settings *csa_settings)
2513 struct sk_buff *skb;
2514 struct ieee80211_mgmt *mgmt;
2515 struct ieee80211_local *local = sdata->local;
2517 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2518 sizeof(mgmt->u.action.u.chan_switch);
2521 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2522 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2525 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2526 5 + /* channel switch announcement element */
2527 3 + /* secondary channel offset element */
2528 8); /* mesh channel switch parameters element */
2532 skb_reserve(skb, local->tx_headroom);
2533 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2534 memset(mgmt, 0, hdr_len);
2535 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2536 IEEE80211_STYPE_ACTION);
2538 eth_broadcast_addr(mgmt->da);
2539 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2540 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2541 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2543 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2544 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2546 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2547 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2548 pos = skb_put(skb, 5);
2549 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2550 *pos++ = 3; /* IE length */
2551 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2552 freq = csa_settings->chandef.chan->center_freq;
2553 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2554 *pos++ = csa_settings->count; /* count */
2556 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2557 enum nl80211_channel_type ch_type;
2560 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2561 *pos++ = 1; /* IE length */
2562 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2563 if (ch_type == NL80211_CHAN_HT40PLUS)
2564 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2566 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2569 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2570 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2573 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2574 *pos++ = 6; /* IE length */
2575 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2576 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2577 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2578 *pos++ |= csa_settings->block_tx ?
2579 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2580 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2582 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2586 ieee80211_tx_skb(sdata, skb);
2590 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2592 return !(cs == NULL || cs->cipher == 0 ||
2593 cs->hdr_len < cs->pn_len + cs->pn_off ||
2594 cs->hdr_len <= cs->key_idx_off ||
2595 cs->key_idx_shift > 7 ||
2596 cs->key_idx_mask == 0);
2599 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2603 /* Ensure we have enough iftype bitmap space for all iftype values */
2604 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2606 for (i = 0; i < n; i++)
2607 if (!ieee80211_cs_valid(&cs[i]))
2613 const struct ieee80211_cipher_scheme *
2614 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2615 enum nl80211_iftype iftype)
2617 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2618 int n = local->hw.n_cipher_schemes;
2620 const struct ieee80211_cipher_scheme *cs = NULL;
2622 for (i = 0; i < n; i++) {
2623 if (l[i].cipher == cipher) {
2629 if (!cs || !(cs->iftype & BIT(iftype)))
2635 int ieee80211_cs_headroom(struct ieee80211_local *local,
2636 struct cfg80211_crypto_settings *crypto,
2637 enum nl80211_iftype iftype)
2639 const struct ieee80211_cipher_scheme *cs;
2640 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2643 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2644 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2647 if (cs && headroom < cs->hdr_len)
2648 headroom = cs->hdr_len;
2651 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2652 if (cs && headroom < cs->hdr_len)
2653 headroom = cs->hdr_len;
2659 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2661 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2667 /* End time is in the past, check for repetitions */
2668 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2669 if (data->count[i] < 255) {
2670 if (data->count[i] <= skip) {
2675 data->count[i] -= skip;
2678 data->desc[i].start += skip * data->desc[i].interval;
2684 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2690 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2693 if (!data->count[i])
2696 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2699 cur = data->desc[i].start - tsf;
2703 cur = data->desc[i].start + data->desc[i].duration - tsf;
2712 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2717 * arbitrary limit, used to avoid infinite loops when combined NoA
2718 * descriptors cover the full time period.
2722 ieee80211_extend_absent_time(data, tsf, &offset);
2724 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2728 } while (tries < max_tries);
2733 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2735 u32 next_offset = BIT(31) - 1;
2739 data->has_next_tsf = false;
2740 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2743 if (!data->count[i])
2746 ieee80211_extend_noa_desc(data, tsf, i);
2747 start = data->desc[i].start - tsf;
2749 data->absent |= BIT(i);
2751 if (next_offset > start)
2752 next_offset = start;
2754 data->has_next_tsf = true;
2758 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2760 data->next_tsf = tsf + next_offset;
2762 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2764 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2765 struct ieee80211_noa_data *data, u32 tsf)
2770 memset(data, 0, sizeof(*data));
2772 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2773 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2775 if (!desc->count || !desc->duration)
2778 data->count[i] = desc->count;
2779 data->desc[i].start = le32_to_cpu(desc->start_time);
2780 data->desc[i].duration = le32_to_cpu(desc->duration);
2781 data->desc[i].interval = le32_to_cpu(desc->interval);
2783 if (data->count[i] > 1 &&
2784 data->desc[i].interval < data->desc[i].duration)
2787 ieee80211_extend_noa_desc(data, tsf, i);
2792 ieee80211_update_p2p_noa(data, tsf);
2796 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2798 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2799 struct ieee80211_sub_if_data *sdata)
2801 u64 tsf = drv_get_tsf(local, sdata);
2803 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2804 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2808 if (tsf == -1ULL || !beacon_int || !dtim_period)
2811 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2812 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2816 ps = &sdata->bss->ps;
2817 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2818 ps = &sdata->u.mesh.ps;
2824 * actually finds last dtim_count, mac80211 will update in
2825 * __beacon_add_tim().
2826 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2828 do_div(tsf, beacon_int);
2829 bcns_from_dtim = do_div(tsf, dtim_period);
2830 /* just had a DTIM */
2831 if (!bcns_from_dtim)
2834 dtim_count = dtim_period - bcns_from_dtim;
2836 ps->dtim_count = dtim_count;
2839 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2840 const struct cfg80211_chan_def *chandef,
2841 enum ieee80211_chanctx_mode chanmode,
2844 struct ieee80211_local *local = sdata->local;
2845 struct ieee80211_sub_if_data *sdata_iter;
2846 enum nl80211_iftype iftype = sdata->wdev.iftype;
2847 int num[NUM_NL80211_IFTYPES];
2848 struct ieee80211_chanctx *ctx;
2849 int num_different_channels = 0;
2852 lockdep_assert_held(&local->chanctx_mtx);
2854 if (WARN_ON(hweight32(radar_detect) > 1))
2857 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2862 num_different_channels = 1;
2864 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
2867 /* Always allow software iftypes */
2868 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
2874 memset(num, 0, sizeof(num));
2876 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
2879 list_for_each_entry(ctx, &local->chanctx_list, list) {
2880 if (ctx->conf.radar_enabled)
2881 radar_detect |= BIT(ctx->conf.def.width);
2882 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
2883 num_different_channels++;
2886 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2887 cfg80211_chandef_compatible(chandef,
2890 num_different_channels++;
2893 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
2894 struct wireless_dev *wdev_iter;
2896 wdev_iter = &sdata_iter->wdev;
2898 if (sdata_iter == sdata ||
2899 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
2900 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
2903 num[wdev_iter->iftype]++;
2907 if (total == 1 && !radar_detect)
2910 return cfg80211_check_combinations(local->hw.wiphy,
2911 num_different_channels,
2916 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
2919 u32 *max_num_different_channels = data;
2921 *max_num_different_channels = max(*max_num_different_channels,
2922 c->num_different_channels);
2925 int ieee80211_max_num_channels(struct ieee80211_local *local)
2927 struct ieee80211_sub_if_data *sdata;
2928 int num[NUM_NL80211_IFTYPES] = {};
2929 struct ieee80211_chanctx *ctx;
2930 int num_different_channels = 0;
2931 u8 radar_detect = 0;
2932 u32 max_num_different_channels = 1;
2935 lockdep_assert_held(&local->chanctx_mtx);
2937 list_for_each_entry(ctx, &local->chanctx_list, list) {
2938 num_different_channels++;
2940 if (ctx->conf.radar_enabled)
2941 radar_detect |= BIT(ctx->conf.def.width);
2944 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2945 num[sdata->wdev.iftype]++;
2947 err = cfg80211_iter_combinations(local->hw.wiphy,
2948 num_different_channels, radar_detect,
2949 num, ieee80211_iter_max_chans,
2950 &max_num_different_channels);
2954 return max_num_different_channels;