2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * utilities for mac80211
15 #include <net/mac80211.h>
16 #include <linux/netdevice.h>
17 #include <linux/export.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/bitmap.h>
24 #include <linux/crc32.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/rtnetlink.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
42 struct ieee80211_local *local;
45 local = wiphy_priv(wiphy);
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
51 enum nl80211_iftype type)
53 __le16 fc = hdr->frame_control;
55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
59 if (ieee80211_is_data(fc)) {
60 if (len < 24) /* drop incorrect hdr len (data) */
63 if (ieee80211_has_a4(fc))
65 if (ieee80211_has_tods(fc))
67 if (ieee80211_has_fromds(fc))
73 if (ieee80211_is_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
83 if (ieee80211_is_back_req(fc)) {
85 case NL80211_IFTYPE_STATION:
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
91 break; /* fall through to the return */
99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
102 struct ieee80211_hdr *hdr;
104 skb_queue_walk(&tx->skbs, skb) {
105 hdr = (struct ieee80211_hdr *) skb->data;
106 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
111 int rate, int erp, int short_preamble,
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
128 if (band == IEEE80211_BAND_5GHZ || erp) {
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
142 dur = 16; /* SIFS + signal ext */
143 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
155 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
156 4 * rate); /* T_SYM x N_SYM */
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
168 dur = 10; /* aSIFSTime = 10 usec */
169 dur += short_preamble ? (72 + 24) : (144 + 48);
171 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
177 /* Exported duration function for driver use */
178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
179 struct ieee80211_vif *vif,
180 enum ieee80211_band band,
182 struct ieee80211_rate *rate)
184 struct ieee80211_sub_if_data *sdata;
187 bool short_preamble = false;
191 sdata = vif_to_sdata(vif);
192 short_preamble = sdata->vif.bss_conf.use_short_preamble;
193 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
194 erp = rate->flags & IEEE80211_RATE_ERP_G;
195 shift = ieee80211_vif_get_shift(vif);
198 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
199 short_preamble, shift);
201 return cpu_to_le16(dur);
203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
206 struct ieee80211_vif *vif, size_t frame_len,
207 const struct ieee80211_tx_info *frame_txctl)
209 struct ieee80211_local *local = hw_to_local(hw);
210 struct ieee80211_rate *rate;
211 struct ieee80211_sub_if_data *sdata;
213 int erp, shift = 0, bitrate;
215 struct ieee80211_supported_band *sband;
217 sband = local->hw.wiphy->bands[frame_txctl->band];
219 short_preamble = false;
221 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
225 sdata = vif_to_sdata(vif);
226 short_preamble = sdata->vif.bss_conf.use_short_preamble;
227 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
228 erp = rate->flags & IEEE80211_RATE_ERP_G;
229 shift = ieee80211_vif_get_shift(vif);
232 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
235 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
237 /* Data frame duration */
238 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
239 erp, short_preamble, shift);
241 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
242 erp, short_preamble, shift);
244 return cpu_to_le16(dur);
246 EXPORT_SYMBOL(ieee80211_rts_duration);
248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
249 struct ieee80211_vif *vif,
251 const struct ieee80211_tx_info *frame_txctl)
253 struct ieee80211_local *local = hw_to_local(hw);
254 struct ieee80211_rate *rate;
255 struct ieee80211_sub_if_data *sdata;
257 int erp, shift = 0, bitrate;
259 struct ieee80211_supported_band *sband;
261 sband = local->hw.wiphy->bands[frame_txctl->band];
263 short_preamble = false;
265 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
268 sdata = vif_to_sdata(vif);
269 short_preamble = sdata->vif.bss_conf.use_short_preamble;
270 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
271 erp = rate->flags & IEEE80211_RATE_ERP_G;
272 shift = ieee80211_vif_get_shift(vif);
275 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
277 /* Data frame duration */
278 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
279 erp, short_preamble, shift);
280 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
282 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
283 erp, short_preamble, shift);
286 return cpu_to_le16(dur);
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
292 struct ieee80211_sub_if_data *sdata;
293 int n_acs = IEEE80211_NUM_ACS;
295 if (local->hw.queues < IEEE80211_NUM_ACS)
298 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
304 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
305 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
308 for (ac = 0; ac < n_acs; ac++) {
309 int ac_queue = sdata->vif.hw_queue[ac];
311 if (ac_queue == queue ||
312 (sdata->vif.cab_queue == queue &&
313 local->queue_stop_reasons[ac_queue] == 0 &&
314 skb_queue_empty(&local->pending[ac_queue])))
315 netif_wake_subqueue(sdata->dev, ac);
320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
321 enum queue_stop_reason reason,
324 struct ieee80211_local *local = hw_to_local(hw);
326 trace_wake_queue(local, queue, reason);
328 if (WARN_ON(queue >= hw->queues))
331 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
335 local->q_stop_reasons[queue][reason] = 0;
337 local->q_stop_reasons[queue][reason]--;
339 if (local->q_stop_reasons[queue][reason] == 0)
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
346 if (skb_queue_empty(&local->pending[queue])) {
348 ieee80211_propagate_queue_wake(local, queue);
351 tasklet_schedule(&local->tx_pending_tasklet);
354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
355 enum queue_stop_reason reason,
358 struct ieee80211_local *local = hw_to_local(hw);
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason, refcounted);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER,
372 EXPORT_SYMBOL(ieee80211_wake_queue);
374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
375 enum queue_stop_reason reason,
378 struct ieee80211_local *local = hw_to_local(hw);
379 struct ieee80211_sub_if_data *sdata;
380 int n_acs = IEEE80211_NUM_ACS;
382 trace_stop_queue(local, queue, reason);
384 if (WARN_ON(queue >= hw->queues))
388 local->q_stop_reasons[queue][reason] = 1;
390 local->q_stop_reasons[queue][reason]++;
392 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
395 if (local->hw.queues < IEEE80211_NUM_ACS)
399 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
405 for (ac = 0; ac < n_acs; ac++) {
406 if (sdata->vif.hw_queue[ac] == queue ||
407 sdata->vif.cab_queue == queue)
408 netif_stop_subqueue(sdata->dev, ac);
414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
415 enum queue_stop_reason reason,
418 struct ieee80211_local *local = hw_to_local(hw);
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 __ieee80211_stop_queue(hw, queue, reason, refcounted);
423 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
428 ieee80211_stop_queue_by_reason(hw, queue,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER,
432 EXPORT_SYMBOL(ieee80211_stop_queue);
434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
437 struct ieee80211_hw *hw = &local->hw;
439 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
440 int queue = info->hw_queue;
442 if (WARN_ON(!info->control.vif)) {
443 ieee80211_free_txskb(&local->hw, skb);
447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
448 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
450 __skb_queue_tail(&local->pending[queue], skb);
451 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
453 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
457 struct sk_buff_head *skbs)
459 struct ieee80211_hw *hw = &local->hw;
464 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465 while ((skb = skb_dequeue(skbs))) {
466 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
468 if (WARN_ON(!info->control.vif)) {
469 ieee80211_free_txskb(&local->hw, skb);
473 queue = info->hw_queue;
475 __ieee80211_stop_queue(hw, queue,
476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
479 __skb_queue_tail(&local->pending[queue], skb);
482 for (i = 0; i < hw->queues; i++)
483 __ieee80211_wake_queue(hw, i,
484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
486 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
490 unsigned long queues,
491 enum queue_stop_reason reason,
494 struct ieee80211_local *local = hw_to_local(hw);
498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
500 for_each_set_bit(i, &queues, hw->queues)
501 __ieee80211_stop_queue(hw, i, reason, refcounted);
503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
508 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
509 IEEE80211_QUEUE_STOP_REASON_DRIVER,
512 EXPORT_SYMBOL(ieee80211_stop_queues);
514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
516 struct ieee80211_local *local = hw_to_local(hw);
520 if (WARN_ON(queue >= hw->queues))
523 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
524 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
525 &local->queue_stop_reasons[queue]);
526 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
529 EXPORT_SYMBOL(ieee80211_queue_stopped);
531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
532 unsigned long queues,
533 enum queue_stop_reason reason,
536 struct ieee80211_local *local = hw_to_local(hw);
540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
542 for_each_set_bit(i, &queues, hw->queues)
543 __ieee80211_wake_queue(hw, i, reason, refcounted);
545 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
550 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
551 IEEE80211_QUEUE_STOP_REASON_DRIVER,
554 EXPORT_SYMBOL(ieee80211_wake_queues);
557 ieee80211_get_vif_queues(struct ieee80211_local *local,
558 struct ieee80211_sub_if_data *sdata)
562 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
567 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
568 queues |= BIT(sdata->vif.hw_queue[ac]);
569 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
570 queues |= BIT(sdata->vif.cab_queue);
573 queues = BIT(local->hw.queues) - 1;
579 void ieee80211_flush_queues(struct ieee80211_local *local,
580 struct ieee80211_sub_if_data *sdata)
584 if (!local->ops->flush)
587 queues = ieee80211_get_vif_queues(local, sdata);
589 ieee80211_stop_queues_by_reason(&local->hw, queues,
590 IEEE80211_QUEUE_STOP_REASON_FLUSH,
593 drv_flush(local, sdata, queues, false);
595 ieee80211_wake_queues_by_reason(&local->hw, queues,
596 IEEE80211_QUEUE_STOP_REASON_FLUSH,
600 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
601 struct ieee80211_sub_if_data *sdata,
602 enum queue_stop_reason reason)
604 ieee80211_stop_queues_by_reason(&local->hw,
605 ieee80211_get_vif_queues(local, sdata),
609 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
610 struct ieee80211_sub_if_data *sdata,
611 enum queue_stop_reason reason)
613 ieee80211_wake_queues_by_reason(&local->hw,
614 ieee80211_get_vif_queues(local, sdata),
618 static void __iterate_active_interfaces(struct ieee80211_local *local,
620 void (*iterator)(void *data, u8 *mac,
621 struct ieee80211_vif *vif),
624 struct ieee80211_sub_if_data *sdata;
626 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
627 switch (sdata->vif.type) {
628 case NL80211_IFTYPE_MONITOR:
629 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
632 case NL80211_IFTYPE_AP_VLAN:
637 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
638 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
640 if (ieee80211_sdata_running(sdata))
641 iterator(data, sdata->vif.addr,
645 sdata = rcu_dereference_check(local->monitor_sdata,
646 lockdep_is_held(&local->iflist_mtx) ||
647 lockdep_rtnl_is_held());
649 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
650 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
651 iterator(data, sdata->vif.addr, &sdata->vif);
654 void ieee80211_iterate_active_interfaces(
655 struct ieee80211_hw *hw, u32 iter_flags,
656 void (*iterator)(void *data, u8 *mac,
657 struct ieee80211_vif *vif),
660 struct ieee80211_local *local = hw_to_local(hw);
662 mutex_lock(&local->iflist_mtx);
663 __iterate_active_interfaces(local, iter_flags, iterator, data);
664 mutex_unlock(&local->iflist_mtx);
666 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
668 void ieee80211_iterate_active_interfaces_atomic(
669 struct ieee80211_hw *hw, u32 iter_flags,
670 void (*iterator)(void *data, u8 *mac,
671 struct ieee80211_vif *vif),
674 struct ieee80211_local *local = hw_to_local(hw);
677 __iterate_active_interfaces(local, iter_flags, iterator, data);
680 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
682 void ieee80211_iterate_active_interfaces_rtnl(
683 struct ieee80211_hw *hw, u32 iter_flags,
684 void (*iterator)(void *data, u8 *mac,
685 struct ieee80211_vif *vif),
688 struct ieee80211_local *local = hw_to_local(hw);
692 __iterate_active_interfaces(local, iter_flags, iterator, data);
694 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
696 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
698 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
700 if (!ieee80211_sdata_running(sdata) ||
701 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
705 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
708 * Nothing should have been stuffed into the workqueue during
709 * the suspend->resume cycle. If this WARN is seen then there
710 * is a bug with either the driver suspend or something in
711 * mac80211 stuffing into the workqueue which we haven't yet
712 * cleared during mac80211's suspend cycle.
714 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
716 if (WARN(local->suspended && !local->resuming,
717 "queueing ieee80211 work while going to suspend\n"))
723 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
725 struct ieee80211_local *local = hw_to_local(hw);
727 if (!ieee80211_can_queue_work(local))
730 queue_work(local->workqueue, work);
732 EXPORT_SYMBOL(ieee80211_queue_work);
734 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
735 struct delayed_work *dwork,
738 struct ieee80211_local *local = hw_to_local(hw);
740 if (!ieee80211_can_queue_work(local))
743 queue_delayed_work(local->workqueue, dwork, delay);
745 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
747 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
748 struct ieee802_11_elems *elems,
752 const u8 *pos = start;
753 bool calc_crc = filter != 0;
754 DECLARE_BITMAP(seen_elems, 256);
757 bitmap_zero(seen_elems, 256);
758 memset(elems, 0, sizeof(*elems));
759 elems->ie_start = start;
760 elems->total_len = len;
764 bool elem_parse_failed;
771 elems->parse_error = true;
777 case WLAN_EID_SUPP_RATES:
778 case WLAN_EID_FH_PARAMS:
779 case WLAN_EID_DS_PARAMS:
780 case WLAN_EID_CF_PARAMS:
782 case WLAN_EID_IBSS_PARAMS:
783 case WLAN_EID_CHALLENGE:
785 case WLAN_EID_ERP_INFO:
786 case WLAN_EID_EXT_SUPP_RATES:
787 case WLAN_EID_HT_CAPABILITY:
788 case WLAN_EID_HT_OPERATION:
789 case WLAN_EID_VHT_CAPABILITY:
790 case WLAN_EID_VHT_OPERATION:
791 case WLAN_EID_MESH_ID:
792 case WLAN_EID_MESH_CONFIG:
793 case WLAN_EID_PEER_MGMT:
798 case WLAN_EID_CHANNEL_SWITCH:
799 case WLAN_EID_EXT_CHANSWITCH_ANN:
800 case WLAN_EID_COUNTRY:
801 case WLAN_EID_PWR_CONSTRAINT:
802 case WLAN_EID_TIMEOUT_INTERVAL:
803 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
804 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
805 case WLAN_EID_CHAN_SWITCH_PARAM:
807 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
808 * that if the content gets bigger it might be needed more than once
810 if (test_bit(id, seen_elems)) {
811 elems->parse_error = true;
819 if (calc_crc && id < 64 && (filter & (1ULL << id)))
820 crc = crc32_be(crc, pos - 2, elen + 2);
822 elem_parse_failed = false;
827 elems->ssid_len = elen;
829 case WLAN_EID_SUPP_RATES:
830 elems->supp_rates = pos;
831 elems->supp_rates_len = elen;
833 case WLAN_EID_DS_PARAMS:
835 elems->ds_params = pos;
837 elem_parse_failed = true;
840 if (elen >= sizeof(struct ieee80211_tim_ie)) {
841 elems->tim = (void *)pos;
842 elems->tim_len = elen;
844 elem_parse_failed = true;
846 case WLAN_EID_CHALLENGE:
847 elems->challenge = pos;
848 elems->challenge_len = elen;
850 case WLAN_EID_VENDOR_SPECIFIC:
851 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
853 /* Microsoft OUI (00:50:F2) */
856 crc = crc32_be(crc, pos - 2, elen + 2);
858 if (elen >= 5 && pos[3] == 2) {
859 /* OUI Type 2 - WMM IE */
861 elems->wmm_info = pos;
862 elems->wmm_info_len = elen;
863 } else if (pos[4] == 1) {
864 elems->wmm_param = pos;
865 elems->wmm_param_len = elen;
872 elems->rsn_len = elen;
874 case WLAN_EID_ERP_INFO:
876 elems->erp_info = pos;
878 elem_parse_failed = true;
880 case WLAN_EID_EXT_SUPP_RATES:
881 elems->ext_supp_rates = pos;
882 elems->ext_supp_rates_len = elen;
884 case WLAN_EID_HT_CAPABILITY:
885 if (elen >= sizeof(struct ieee80211_ht_cap))
886 elems->ht_cap_elem = (void *)pos;
888 elem_parse_failed = true;
890 case WLAN_EID_HT_OPERATION:
891 if (elen >= sizeof(struct ieee80211_ht_operation))
892 elems->ht_operation = (void *)pos;
894 elem_parse_failed = true;
896 case WLAN_EID_VHT_CAPABILITY:
897 if (elen >= sizeof(struct ieee80211_vht_cap))
898 elems->vht_cap_elem = (void *)pos;
900 elem_parse_failed = true;
902 case WLAN_EID_VHT_OPERATION:
903 if (elen >= sizeof(struct ieee80211_vht_operation))
904 elems->vht_operation = (void *)pos;
906 elem_parse_failed = true;
908 case WLAN_EID_OPMODE_NOTIF:
910 elems->opmode_notif = pos;
912 elem_parse_failed = true;
914 case WLAN_EID_MESH_ID:
915 elems->mesh_id = pos;
916 elems->mesh_id_len = elen;
918 case WLAN_EID_MESH_CONFIG:
919 if (elen >= sizeof(struct ieee80211_meshconf_ie))
920 elems->mesh_config = (void *)pos;
922 elem_parse_failed = true;
924 case WLAN_EID_PEER_MGMT:
925 elems->peering = pos;
926 elems->peering_len = elen;
928 case WLAN_EID_MESH_AWAKE_WINDOW:
930 elems->awake_window = (void *)pos;
934 elems->preq_len = elen;
938 elems->prep_len = elen;
942 elems->perr_len = elen;
945 if (elen >= sizeof(struct ieee80211_rann_ie))
946 elems->rann = (void *)pos;
948 elem_parse_failed = true;
950 case WLAN_EID_CHANNEL_SWITCH:
951 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
952 elem_parse_failed = true;
955 elems->ch_switch_ie = (void *)pos;
957 case WLAN_EID_EXT_CHANSWITCH_ANN:
958 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
959 elem_parse_failed = true;
962 elems->ext_chansw_ie = (void *)pos;
964 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
965 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
966 elem_parse_failed = true;
969 elems->sec_chan_offs = (void *)pos;
971 case WLAN_EID_CHAN_SWITCH_PARAM:
973 sizeof(*elems->mesh_chansw_params_ie)) {
974 elem_parse_failed = true;
977 elems->mesh_chansw_params_ie = (void *)pos;
979 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
981 elen != sizeof(*elems->wide_bw_chansw_ie)) {
982 elem_parse_failed = true;
985 elems->wide_bw_chansw_ie = (void *)pos;
987 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
989 elem_parse_failed = true;
993 * This is a bit tricky, but as we only care about
994 * the wide bandwidth channel switch element, so
995 * just parse it out manually.
997 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1000 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1001 elems->wide_bw_chansw_ie =
1004 elem_parse_failed = true;
1007 case WLAN_EID_COUNTRY:
1008 elems->country_elem = pos;
1009 elems->country_elem_len = elen;
1011 case WLAN_EID_PWR_CONSTRAINT:
1013 elem_parse_failed = true;
1016 elems->pwr_constr_elem = pos;
1018 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1019 /* Lots of different options exist, but we only care
1020 * about the Dynamic Transmit Power Control element.
1021 * First check for the Cisco OUI, then for the DTPC
1025 elem_parse_failed = true;
1029 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1030 pos[2] != 0x96 || pos[3] != 0x00)
1034 elem_parse_failed = true;
1039 crc = crc32_be(crc, pos - 2, elen + 2);
1041 elems->cisco_dtpc_elem = pos;
1043 case WLAN_EID_TIMEOUT_INTERVAL:
1044 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1045 elems->timeout_int = (void *)pos;
1047 elem_parse_failed = true;
1053 if (elem_parse_failed)
1054 elems->parse_error = true;
1056 __set_bit(id, seen_elems);
1063 elems->parse_error = true;
1068 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1071 struct ieee80211_local *local = sdata->local;
1072 struct ieee80211_tx_queue_params qparam;
1073 struct ieee80211_chanctx_conf *chanctx_conf;
1075 bool use_11b, enable_qos;
1078 if (!local->ops->conf_tx)
1081 if (local->hw.queues < IEEE80211_NUM_ACS)
1084 memset(&qparam, 0, sizeof(qparam));
1087 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1088 use_11b = (chanctx_conf &&
1089 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1090 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1094 * By default disable QoS in STA mode for old access points, which do
1095 * not support 802.11e. New APs will provide proper queue parameters,
1096 * that we will configure later.
1098 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1100 /* Set defaults according to 802.11-2007 Table 7-37 */
1107 /* Confiure old 802.11b/g medium access rules. */
1108 qparam.cw_max = aCWmax;
1109 qparam.cw_min = aCWmin;
1113 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1114 /* Update if QoS is enabled. */
1117 case IEEE80211_AC_BK:
1118 qparam.cw_max = aCWmax;
1119 qparam.cw_min = aCWmin;
1123 /* never happens but let's not leave undefined */
1125 case IEEE80211_AC_BE:
1126 qparam.cw_max = aCWmax;
1127 qparam.cw_min = aCWmin;
1131 case IEEE80211_AC_VI:
1132 qparam.cw_max = aCWmin;
1133 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1135 qparam.txop = 6016/32;
1137 qparam.txop = 3008/32;
1140 case IEEE80211_AC_VO:
1141 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1142 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1144 qparam.txop = 3264/32;
1146 qparam.txop = 1504/32;
1152 qparam.uapsd = false;
1154 sdata->tx_conf[ac] = qparam;
1155 drv_conf_tx(local, sdata, ac, &qparam);
1158 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1159 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1160 sdata->vif.bss_conf.qos = enable_qos;
1162 ieee80211_bss_info_change_notify(sdata,
1167 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1168 u16 transaction, u16 auth_alg, u16 status,
1169 const u8 *extra, size_t extra_len, const u8 *da,
1170 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1173 struct ieee80211_local *local = sdata->local;
1174 struct sk_buff *skb;
1175 struct ieee80211_mgmt *mgmt;
1178 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1179 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1180 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1184 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1186 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1187 memset(mgmt, 0, 24 + 6);
1188 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1189 IEEE80211_STYPE_AUTH);
1190 memcpy(mgmt->da, da, ETH_ALEN);
1191 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1192 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1193 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1194 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1195 mgmt->u.auth.status_code = cpu_to_le16(status);
1197 memcpy(skb_put(skb, extra_len), extra, extra_len);
1199 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1200 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1201 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1205 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1207 ieee80211_tx_skb(sdata, skb);
1210 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1211 const u8 *bssid, u16 stype, u16 reason,
1212 bool send_frame, u8 *frame_buf)
1214 struct ieee80211_local *local = sdata->local;
1215 struct sk_buff *skb;
1216 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1219 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1220 mgmt->duration = 0; /* initialize only */
1221 mgmt->seq_ctrl = 0; /* initialize only */
1222 memcpy(mgmt->da, bssid, ETH_ALEN);
1223 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1224 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1225 /* u.deauth.reason_code == u.disassoc.reason_code */
1226 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1229 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1230 IEEE80211_DEAUTH_FRAME_LEN);
1234 skb_reserve(skb, local->hw.extra_tx_headroom);
1237 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1238 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1240 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1241 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1242 IEEE80211_SKB_CB(skb)->flags |=
1243 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1245 ieee80211_tx_skb(sdata, skb);
1249 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1250 u8 *buffer, size_t buffer_len,
1251 const u8 *ie, size_t ie_len,
1252 enum ieee80211_band band,
1254 struct cfg80211_chan_def *chandef,
1257 struct ieee80211_supported_band *sband;
1258 u8 *pos = buffer, *end = buffer + buffer_len;
1260 int supp_rates_len, i;
1269 sband = local->hw.wiphy->bands[band];
1270 if (WARN_ON_ONCE(!sband))
1273 rate_flags = ieee80211_chandef_rate_flags(chandef);
1274 shift = ieee80211_chandef_get_shift(chandef);
1277 for (i = 0; i < sband->n_bitrates; i++) {
1278 if ((BIT(i) & rate_mask) == 0)
1279 continue; /* skip rate */
1280 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1283 rates[num_rates++] =
1284 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1288 supp_rates_len = min_t(int, num_rates, 8);
1290 if (end - pos < 2 + supp_rates_len)
1292 *pos++ = WLAN_EID_SUPP_RATES;
1293 *pos++ = supp_rates_len;
1294 memcpy(pos, rates, supp_rates_len);
1295 pos += supp_rates_len;
1297 /* insert "request information" if in custom IEs */
1299 static const u8 before_extrates[] = {
1301 WLAN_EID_SUPP_RATES,
1304 noffset = ieee80211_ie_split(ie, ie_len,
1306 ARRAY_SIZE(before_extrates),
1308 if (end - pos < noffset - *offset)
1310 memcpy(pos, ie + *offset, noffset - *offset);
1311 pos += noffset - *offset;
1315 ext_rates_len = num_rates - supp_rates_len;
1316 if (ext_rates_len > 0) {
1317 if (end - pos < 2 + ext_rates_len)
1319 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1320 *pos++ = ext_rates_len;
1321 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1322 pos += ext_rates_len;
1325 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1328 *pos++ = WLAN_EID_DS_PARAMS;
1330 *pos++ = ieee80211_frequency_to_channel(
1331 chandef->chan->center_freq);
1334 /* insert custom IEs that go before HT */
1336 static const u8 before_ht[] = {
1338 WLAN_EID_SUPP_RATES,
1340 WLAN_EID_EXT_SUPP_RATES,
1342 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1344 noffset = ieee80211_ie_split(ie, ie_len,
1345 before_ht, ARRAY_SIZE(before_ht),
1347 if (end - pos < noffset - *offset)
1349 memcpy(pos, ie + *offset, noffset - *offset);
1350 pos += noffset - *offset;
1354 if (sband->ht_cap.ht_supported) {
1355 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1357 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1362 * If adding more here, adjust code in main.c
1363 * that calculates local->scan_ies_len.
1366 /* insert custom IEs that go before VHT */
1368 static const u8 before_vht[] = {
1370 WLAN_EID_SUPP_RATES,
1372 WLAN_EID_EXT_SUPP_RATES,
1374 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1375 WLAN_EID_HT_CAPABILITY,
1376 WLAN_EID_BSS_COEX_2040,
1377 WLAN_EID_EXT_CAPABILITY,
1379 WLAN_EID_CHANNEL_USAGE,
1380 WLAN_EID_INTERWORKING,
1381 /* mesh ID can't happen here */
1382 /* 60 GHz can't happen here right now */
1384 noffset = ieee80211_ie_split(ie, ie_len,
1385 before_vht, ARRAY_SIZE(before_vht),
1387 if (end - pos < noffset - *offset)
1389 memcpy(pos, ie + *offset, noffset - *offset);
1390 pos += noffset - *offset;
1394 if (sband->vht_cap.vht_supported) {
1395 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1397 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1398 sband->vht_cap.cap);
1401 return pos - buffer;
1403 WARN_ONCE(1, "not enough space for preq IEs\n");
1404 return pos - buffer;
1407 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1409 struct ieee80211_scan_ies *ie_desc,
1410 const u8 *ie, size_t ie_len,
1411 u8 bands_used, u32 *rate_masks,
1412 struct cfg80211_chan_def *chandef)
1414 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1417 memset(ie_desc, 0, sizeof(*ie_desc));
1419 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1420 if (bands_used & BIT(i)) {
1421 pos += ieee80211_build_preq_ies_band(local,
1428 ie_desc->ies[i] = buffer + old_pos;
1429 ie_desc->len[i] = pos - old_pos;
1434 /* add any remaining custom IEs */
1436 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1437 "not enough space for preq custom IEs\n"))
1439 memcpy(buffer + pos, ie + custom_ie_offset,
1440 ie_len - custom_ie_offset);
1441 ie_desc->common_ies = buffer + pos;
1442 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1443 pos += ie_len - custom_ie_offset;
1449 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1450 u8 *dst, u32 ratemask,
1451 struct ieee80211_channel *chan,
1452 const u8 *ssid, size_t ssid_len,
1453 const u8 *ie, size_t ie_len,
1456 struct ieee80211_local *local = sdata->local;
1457 struct cfg80211_chan_def chandef;
1458 struct sk_buff *skb;
1459 struct ieee80211_mgmt *mgmt;
1461 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1462 struct ieee80211_scan_ies dummy_ie_desc;
1465 * Do not send DS Channel parameter for directed probe requests
1466 * in order to maximize the chance that we get a response. Some
1467 * badly-behaved APs don't respond when this parameter is included.
1469 chandef.width = sdata->vif.bss_conf.chandef.width;
1471 chandef.chan = NULL;
1473 chandef.chan = chan;
1475 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1476 ssid, ssid_len, 100 + ie_len);
1480 rate_masks[chan->band] = ratemask;
1481 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1482 skb_tailroom(skb), &dummy_ie_desc,
1483 ie, ie_len, BIT(chan->band),
1484 rate_masks, &chandef);
1485 skb_put(skb, ies_len);
1488 mgmt = (struct ieee80211_mgmt *) skb->data;
1489 memcpy(mgmt->da, dst, ETH_ALEN);
1490 memcpy(mgmt->bssid, dst, ETH_ALEN);
1493 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1498 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1499 const u8 *ssid, size_t ssid_len,
1500 const u8 *ie, size_t ie_len,
1501 u32 ratemask, bool directed, u32 tx_flags,
1502 struct ieee80211_channel *channel, bool scan)
1504 struct sk_buff *skb;
1506 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1508 ie, ie_len, directed);
1510 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1512 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1514 ieee80211_tx_skb(sdata, skb);
1518 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1519 struct ieee802_11_elems *elems,
1520 enum ieee80211_band band, u32 *basic_rates)
1522 struct ieee80211_supported_band *sband;
1524 u32 supp_rates, rate_flags;
1526 sband = sdata->local->hw.wiphy->bands[band];
1528 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1529 shift = ieee80211_vif_get_shift(&sdata->vif);
1531 if (WARN_ON(!sband))
1534 num_rates = sband->n_bitrates;
1536 for (i = 0; i < elems->supp_rates_len +
1537 elems->ext_supp_rates_len; i++) {
1541 if (i < elems->supp_rates_len)
1542 rate = elems->supp_rates[i];
1543 else if (elems->ext_supp_rates)
1544 rate = elems->ext_supp_rates
1545 [i - elems->supp_rates_len];
1546 own_rate = 5 * (rate & 0x7f);
1547 is_basic = !!(rate & 0x80);
1549 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1552 for (j = 0; j < num_rates; j++) {
1554 if ((rate_flags & sband->bitrates[j].flags)
1558 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1561 if (brate == own_rate) {
1562 supp_rates |= BIT(j);
1563 if (basic_rates && is_basic)
1564 *basic_rates |= BIT(j);
1571 void ieee80211_stop_device(struct ieee80211_local *local)
1573 ieee80211_led_radio(local, false);
1574 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1576 cancel_work_sync(&local->reconfig_filter);
1578 flush_workqueue(local->workqueue);
1582 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1584 struct ieee80211_sub_if_data *sdata;
1585 struct ieee80211_chanctx *ctx;
1588 * We get here if during resume the device can't be restarted properly.
1589 * We might also get here if this happens during HW reset, which is a
1590 * slightly different situation and we need to drop all connections in
1593 * Ask cfg80211 to turn off all interfaces, this will result in more
1594 * warnings but at least we'll then get into a clean stopped state.
1597 local->resuming = false;
1598 local->suspended = false;
1599 local->started = false;
1601 /* scheduled scan clearly can't be running any more, but tell
1602 * cfg80211 and clear local state
1604 ieee80211_sched_scan_end(local);
1606 list_for_each_entry(sdata, &local->interfaces, list)
1607 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1609 /* Mark channel contexts as not being in the driver any more to avoid
1610 * removing them from the driver during the shutdown process...
1612 mutex_lock(&local->chanctx_mtx);
1613 list_for_each_entry(ctx, &local->chanctx_list, list)
1614 ctx->driver_present = false;
1615 mutex_unlock(&local->chanctx_mtx);
1617 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1620 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1621 struct ieee80211_sub_if_data *sdata)
1623 struct ieee80211_chanctx_conf *conf;
1624 struct ieee80211_chanctx *ctx;
1626 if (!local->use_chanctx)
1629 mutex_lock(&local->chanctx_mtx);
1630 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1631 lockdep_is_held(&local->chanctx_mtx));
1633 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1634 drv_assign_vif_chanctx(local, sdata, ctx);
1636 mutex_unlock(&local->chanctx_mtx);
1639 int ieee80211_reconfig(struct ieee80211_local *local)
1641 struct ieee80211_hw *hw = &local->hw;
1642 struct ieee80211_sub_if_data *sdata;
1643 struct ieee80211_chanctx *ctx;
1644 struct sta_info *sta;
1646 bool reconfig_due_to_wowlan = false;
1647 struct ieee80211_sub_if_data *sched_scan_sdata;
1648 bool sched_scan_stopped = false;
1651 if (local->suspended)
1652 local->resuming = true;
1654 if (local->wowlan) {
1655 res = drv_resume(local);
1656 local->wowlan = false;
1658 local->resuming = false;
1665 * res is 1, which means the driver requested
1666 * to go through a regular reset on wakeup.
1668 reconfig_due_to_wowlan = true;
1671 /* everything else happens only if HW was up & running */
1672 if (!local->open_count)
1676 * Upon resume hardware can sometimes be goofy due to
1677 * various platform / driver / bus issues, so restarting
1678 * the device may at times not work immediately. Propagate
1681 res = drv_start(local);
1683 if (local->suspended)
1684 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1686 WARN(1, "Hardware became unavailable during restart.\n");
1687 ieee80211_handle_reconfig_failure(local);
1691 /* setup fragmentation threshold */
1692 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1694 /* setup RTS threshold */
1695 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1697 /* reset coverage class */
1698 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1700 ieee80211_led_radio(local, true);
1701 ieee80211_mod_tpt_led_trig(local,
1702 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1704 /* add interfaces */
1705 sdata = rtnl_dereference(local->monitor_sdata);
1707 /* in HW restart it exists already */
1708 WARN_ON(local->resuming);
1709 res = drv_add_interface(local, sdata);
1711 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1717 list_for_each_entry(sdata, &local->interfaces, list) {
1718 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1719 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1720 ieee80211_sdata_running(sdata))
1721 res = drv_add_interface(local, sdata);
1724 /* add channel contexts */
1725 if (local->use_chanctx) {
1726 mutex_lock(&local->chanctx_mtx);
1727 list_for_each_entry(ctx, &local->chanctx_list, list)
1728 if (ctx->replace_state !=
1729 IEEE80211_CHANCTX_REPLACES_OTHER)
1730 WARN_ON(drv_add_chanctx(local, ctx));
1731 mutex_unlock(&local->chanctx_mtx);
1733 list_for_each_entry(sdata, &local->interfaces, list) {
1734 if (!ieee80211_sdata_running(sdata))
1736 ieee80211_assign_chanctx(local, sdata);
1739 sdata = rtnl_dereference(local->monitor_sdata);
1740 if (sdata && ieee80211_sdata_running(sdata))
1741 ieee80211_assign_chanctx(local, sdata);
1745 mutex_lock(&local->sta_mtx);
1746 list_for_each_entry(sta, &local->sta_list, list) {
1747 enum ieee80211_sta_state state;
1752 /* AP-mode stations will be added later */
1753 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1756 for (state = IEEE80211_STA_NOTEXIST;
1757 state < sta->sta_state; state++)
1758 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1761 mutex_unlock(&local->sta_mtx);
1763 /* reconfigure tx conf */
1764 if (hw->queues >= IEEE80211_NUM_ACS) {
1765 list_for_each_entry(sdata, &local->interfaces, list) {
1766 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1767 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1768 !ieee80211_sdata_running(sdata))
1771 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1772 drv_conf_tx(local, sdata, i,
1773 &sdata->tx_conf[i]);
1777 /* reconfigure hardware */
1778 ieee80211_hw_config(local, ~0);
1780 ieee80211_configure_filter(local);
1782 /* Finally also reconfigure all the BSS information */
1783 list_for_each_entry(sdata, &local->interfaces, list) {
1786 if (!ieee80211_sdata_running(sdata))
1789 /* common change flags for all interface types */
1790 changed = BSS_CHANGED_ERP_CTS_PROT |
1791 BSS_CHANGED_ERP_PREAMBLE |
1792 BSS_CHANGED_ERP_SLOT |
1794 BSS_CHANGED_BASIC_RATES |
1795 BSS_CHANGED_BEACON_INT |
1800 BSS_CHANGED_TXPOWER;
1802 switch (sdata->vif.type) {
1803 case NL80211_IFTYPE_STATION:
1804 changed |= BSS_CHANGED_ASSOC |
1805 BSS_CHANGED_ARP_FILTER |
1808 /* Re-send beacon info report to the driver */
1809 if (sdata->u.mgd.have_beacon)
1810 changed |= BSS_CHANGED_BEACON_INFO;
1813 ieee80211_bss_info_change_notify(sdata, changed);
1814 sdata_unlock(sdata);
1816 case NL80211_IFTYPE_ADHOC:
1817 changed |= BSS_CHANGED_IBSS;
1819 case NL80211_IFTYPE_AP:
1820 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1822 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1823 changed |= BSS_CHANGED_AP_PROBE_RESP;
1825 if (rcu_access_pointer(sdata->u.ap.beacon))
1826 drv_start_ap(local, sdata);
1830 case NL80211_IFTYPE_MESH_POINT:
1831 if (sdata->vif.bss_conf.enable_beacon) {
1832 changed |= BSS_CHANGED_BEACON |
1833 BSS_CHANGED_BEACON_ENABLED;
1834 ieee80211_bss_info_change_notify(sdata, changed);
1837 case NL80211_IFTYPE_WDS:
1838 case NL80211_IFTYPE_AP_VLAN:
1839 case NL80211_IFTYPE_MONITOR:
1840 case NL80211_IFTYPE_P2P_DEVICE:
1843 case NL80211_IFTYPE_UNSPECIFIED:
1844 case NUM_NL80211_IFTYPES:
1845 case NL80211_IFTYPE_P2P_CLIENT:
1846 case NL80211_IFTYPE_P2P_GO:
1852 ieee80211_recalc_ps(local, -1);
1855 * The sta might be in psm against the ap (e.g. because
1856 * this was the state before a hw restart), so we
1857 * explicitly send a null packet in order to make sure
1858 * it'll sync against the ap (and get out of psm).
1860 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1861 list_for_each_entry(sdata, &local->interfaces, list) {
1862 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1864 if (!sdata->u.mgd.associated)
1867 ieee80211_send_nullfunc(local, sdata, 0);
1871 /* APs are now beaconing, add back stations */
1872 mutex_lock(&local->sta_mtx);
1873 list_for_each_entry(sta, &local->sta_list, list) {
1874 enum ieee80211_sta_state state;
1879 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1882 for (state = IEEE80211_STA_NOTEXIST;
1883 state < sta->sta_state; state++)
1884 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1887 mutex_unlock(&local->sta_mtx);
1890 list_for_each_entry(sdata, &local->interfaces, list)
1891 if (ieee80211_sdata_running(sdata))
1892 ieee80211_enable_keys(sdata);
1895 local->in_reconfig = false;
1898 if (local->monitors == local->open_count && local->monitors > 0)
1899 ieee80211_add_virtual_monitor(local);
1902 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1903 * sessions can be established after a resume.
1905 * Also tear down aggregation sessions since reconfiguring
1906 * them in a hardware restart scenario is not easily done
1907 * right now, and the hardware will have lost information
1908 * about the sessions, but we and the AP still think they
1909 * are active. This is really a workaround though.
1911 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1912 mutex_lock(&local->sta_mtx);
1914 list_for_each_entry(sta, &local->sta_list, list) {
1915 ieee80211_sta_tear_down_BA_sessions(
1916 sta, AGG_STOP_LOCAL_REQUEST);
1917 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1920 mutex_unlock(&local->sta_mtx);
1923 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1924 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1928 * Reconfigure sched scan if it was interrupted by FW restart or
1931 mutex_lock(&local->mtx);
1932 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1933 lockdep_is_held(&local->mtx));
1934 if (sched_scan_sdata && local->sched_scan_req)
1936 * Sched scan stopped, but we don't want to report it. Instead,
1937 * we're trying to reschedule.
1939 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1940 local->sched_scan_req))
1941 sched_scan_stopped = true;
1942 mutex_unlock(&local->mtx);
1944 if (sched_scan_stopped)
1945 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1948 * If this is for hw restart things are still running.
1949 * We may want to change that later, however.
1951 if (!local->suspended || reconfig_due_to_wowlan)
1952 drv_restart_complete(local);
1954 if (!local->suspended)
1958 /* first set suspended false, then resuming */
1959 local->suspended = false;
1961 local->resuming = false;
1963 list_for_each_entry(sdata, &local->interfaces, list) {
1964 if (!ieee80211_sdata_running(sdata))
1966 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1967 ieee80211_sta_restart(sdata);
1970 mod_timer(&local->sta_cleanup, jiffies + 1);
1978 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1980 struct ieee80211_sub_if_data *sdata;
1981 struct ieee80211_local *local;
1982 struct ieee80211_key *key;
1987 sdata = vif_to_sdata(vif);
1988 local = sdata->local;
1990 if (WARN_ON(!local->resuming))
1993 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1996 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1998 mutex_lock(&local->key_mtx);
1999 list_for_each_entry(key, &sdata->key_list, list)
2000 key->flags |= KEY_FLAG_TAINTED;
2001 mutex_unlock(&local->key_mtx);
2003 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2005 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2007 struct ieee80211_local *local = sdata->local;
2008 struct ieee80211_chanctx_conf *chanctx_conf;
2009 struct ieee80211_chanctx *chanctx;
2011 mutex_lock(&local->chanctx_mtx);
2013 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2014 lockdep_is_held(&local->chanctx_mtx));
2016 if (WARN_ON_ONCE(!chanctx_conf))
2019 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2020 ieee80211_recalc_smps_chanctx(local, chanctx);
2022 mutex_unlock(&local->chanctx_mtx);
2025 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2027 struct ieee80211_local *local = sdata->local;
2028 struct ieee80211_chanctx_conf *chanctx_conf;
2029 struct ieee80211_chanctx *chanctx;
2031 mutex_lock(&local->chanctx_mtx);
2033 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2034 lockdep_is_held(&local->chanctx_mtx));
2036 if (WARN_ON_ONCE(!chanctx_conf))
2039 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2040 ieee80211_recalc_chanctx_min_def(local, chanctx);
2042 mutex_unlock(&local->chanctx_mtx);
2045 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2049 for (i = 0; i < n_ids; i++)
2056 * ieee80211_ie_split - split an IE buffer according to ordering
2058 * @ies: the IE buffer
2059 * @ielen: the length of the IE buffer
2060 * @ids: an array with element IDs that are allowed before
2062 * @n_ids: the size of the element ID array
2063 * @offset: offset where to start splitting in the buffer
2065 * This function splits an IE buffer by updating the @offset
2066 * variable to point to the location where the buffer should be
2069 * It assumes that the given IE buffer is well-formed, this
2070 * has to be guaranteed by the caller!
2072 * It also assumes that the IEs in the buffer are ordered
2073 * correctly, if not the result of using this function will not
2074 * be ordered correctly either, i.e. it does no reordering.
2076 * The function returns the offset where the next part of the
2077 * buffer starts, which may be @ielen if the entire (remainder)
2078 * of the buffer should be used.
2080 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2081 const u8 *ids, int n_ids, size_t offset)
2083 size_t pos = offset;
2085 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2086 pos += 2 + ies[pos + 1];
2091 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2093 size_t pos = offset;
2095 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2096 pos += 2 + ies[pos + 1];
2101 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2105 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2107 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2111 * Scale up threshold values before storing it, as the RSSI averaging
2112 * algorithm uses a scaled up value as well. Change this scaling
2113 * factor if the RSSI averaging algorithm changes.
2115 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2116 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2119 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2123 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2125 WARN_ON(rssi_min_thold == rssi_max_thold ||
2126 rssi_min_thold > rssi_max_thold);
2128 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2131 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2133 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2135 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2137 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2139 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2141 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2146 *pos++ = WLAN_EID_HT_CAPABILITY;
2147 *pos++ = sizeof(struct ieee80211_ht_cap);
2148 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2150 /* capability flags */
2151 tmp = cpu_to_le16(cap);
2152 memcpy(pos, &tmp, sizeof(u16));
2155 /* AMPDU parameters */
2156 *pos++ = ht_cap->ampdu_factor |
2157 (ht_cap->ampdu_density <<
2158 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2161 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2162 pos += sizeof(ht_cap->mcs);
2164 /* extended capabilities */
2165 pos += sizeof(__le16);
2167 /* BF capabilities */
2168 pos += sizeof(__le32);
2170 /* antenna selection */
2176 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2181 *pos++ = WLAN_EID_VHT_CAPABILITY;
2182 *pos++ = sizeof(struct ieee80211_vht_cap);
2183 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2185 /* capability flags */
2186 tmp = cpu_to_le32(cap);
2187 memcpy(pos, &tmp, sizeof(u32));
2191 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2192 pos += sizeof(vht_cap->vht_mcs);
2197 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2198 const struct cfg80211_chan_def *chandef,
2201 struct ieee80211_ht_operation *ht_oper;
2202 /* Build HT Information */
2203 *pos++ = WLAN_EID_HT_OPERATION;
2204 *pos++ = sizeof(struct ieee80211_ht_operation);
2205 ht_oper = (struct ieee80211_ht_operation *)pos;
2206 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2207 chandef->chan->center_freq);
2208 switch (chandef->width) {
2209 case NL80211_CHAN_WIDTH_160:
2210 case NL80211_CHAN_WIDTH_80P80:
2211 case NL80211_CHAN_WIDTH_80:
2212 case NL80211_CHAN_WIDTH_40:
2213 if (chandef->center_freq1 > chandef->chan->center_freq)
2214 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2216 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2219 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2222 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2223 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2224 chandef->width != NL80211_CHAN_WIDTH_20)
2225 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2227 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2228 ht_oper->stbc_param = 0x0000;
2230 /* It seems that Basic MCS set and Supported MCS set
2231 are identical for the first 10 bytes */
2232 memset(&ht_oper->basic_set, 0, 16);
2233 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2235 return pos + sizeof(struct ieee80211_ht_operation);
2238 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2239 const struct ieee80211_ht_operation *ht_oper,
2240 struct cfg80211_chan_def *chandef)
2242 enum nl80211_channel_type channel_type;
2245 cfg80211_chandef_create(chandef, control_chan,
2246 NL80211_CHAN_NO_HT);
2250 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2251 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2252 channel_type = NL80211_CHAN_HT20;
2254 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2255 channel_type = NL80211_CHAN_HT40PLUS;
2257 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2258 channel_type = NL80211_CHAN_HT40MINUS;
2261 channel_type = NL80211_CHAN_NO_HT;
2264 cfg80211_chandef_create(chandef, control_chan, channel_type);
2267 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2268 const struct ieee80211_supported_band *sband,
2269 const u8 *srates, int srates_len, u32 *rates)
2271 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2272 int shift = ieee80211_chandef_get_shift(chandef);
2273 struct ieee80211_rate *br;
2274 int brate, rate, i, j, count = 0;
2278 for (i = 0; i < srates_len; i++) {
2279 rate = srates[i] & 0x7f;
2281 for (j = 0; j < sband->n_bitrates; j++) {
2282 br = &sband->bitrates[j];
2283 if ((rate_flags & br->flags) != rate_flags)
2286 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2287 if (brate == rate) {
2297 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2298 struct sk_buff *skb, bool need_basic,
2299 enum ieee80211_band band)
2301 struct ieee80211_local *local = sdata->local;
2302 struct ieee80211_supported_band *sband;
2305 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2308 shift = ieee80211_vif_get_shift(&sdata->vif);
2309 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2310 sband = local->hw.wiphy->bands[band];
2312 for (i = 0; i < sband->n_bitrates; i++) {
2313 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2320 if (skb_tailroom(skb) < rates + 2)
2323 pos = skb_put(skb, rates + 2);
2324 *pos++ = WLAN_EID_SUPP_RATES;
2326 for (i = 0; i < rates; i++) {
2328 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2331 if (need_basic && basic_rates & BIT(i))
2333 rate = sband->bitrates[i].bitrate;
2334 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2336 *pos++ = basic | (u8) rate;
2342 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2343 struct sk_buff *skb, bool need_basic,
2344 enum ieee80211_band band)
2346 struct ieee80211_local *local = sdata->local;
2347 struct ieee80211_supported_band *sband;
2349 u8 i, exrates, *pos;
2350 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2353 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2354 shift = ieee80211_vif_get_shift(&sdata->vif);
2356 sband = local->hw.wiphy->bands[band];
2358 for (i = 0; i < sband->n_bitrates; i++) {
2359 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2369 if (skb_tailroom(skb) < exrates + 2)
2373 pos = skb_put(skb, exrates + 2);
2374 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2376 for (i = 8; i < sband->n_bitrates; i++) {
2378 if ((rate_flags & sband->bitrates[i].flags)
2381 if (need_basic && basic_rates & BIT(i))
2383 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2385 *pos++ = basic | (u8) rate;
2391 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2393 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2394 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2396 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2397 /* non-managed type inferfaces */
2400 return ifmgd->ave_beacon_signal / 16;
2402 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2404 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2409 /* TODO: consider rx_highest */
2411 if (mcs->rx_mask[3])
2413 if (mcs->rx_mask[2])
2415 if (mcs->rx_mask[1])
2421 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2422 * @local: mac80211 hw info struct
2423 * @status: RX status
2424 * @mpdu_len: total MPDU length (including FCS)
2425 * @mpdu_offset: offset into MPDU to calculate timestamp at
2427 * This function calculates the RX timestamp at the given MPDU offset, taking
2428 * into account what the RX timestamp was. An offset of 0 will just normalize
2429 * the timestamp to TSF at beginning of MPDU reception.
2431 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2432 struct ieee80211_rx_status *status,
2433 unsigned int mpdu_len,
2434 unsigned int mpdu_offset)
2436 u64 ts = status->mactime;
2437 struct rate_info ri;
2440 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2443 memset(&ri, 0, sizeof(ri));
2445 /* Fill cfg80211 rate info */
2446 if (status->flag & RX_FLAG_HT) {
2447 ri.mcs = status->rate_idx;
2448 ri.flags |= RATE_INFO_FLAGS_MCS;
2449 if (status->flag & RX_FLAG_40MHZ)
2450 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2451 if (status->flag & RX_FLAG_SHORT_GI)
2452 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2453 } else if (status->flag & RX_FLAG_VHT) {
2454 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2455 ri.mcs = status->rate_idx;
2456 ri.nss = status->vht_nss;
2457 if (status->flag & RX_FLAG_40MHZ)
2458 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2459 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2460 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2461 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2462 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2463 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2464 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2465 if (status->flag & RX_FLAG_SHORT_GI)
2466 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2468 struct ieee80211_supported_band *sband;
2472 if (status->flag & RX_FLAG_10MHZ)
2474 if (status->flag & RX_FLAG_5MHZ)
2477 sband = local->hw.wiphy->bands[status->band];
2478 bitrate = sband->bitrates[status->rate_idx].bitrate;
2479 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2482 rate = cfg80211_calculate_bitrate(&ri);
2483 if (WARN_ONCE(!rate,
2484 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2485 status->flag, status->rate_idx, status->vht_nss))
2488 /* rewind from end of MPDU */
2489 if (status->flag & RX_FLAG_MACTIME_END)
2490 ts -= mpdu_len * 8 * 10 / rate;
2492 ts += mpdu_offset * 8 * 10 / rate;
2497 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2499 struct ieee80211_sub_if_data *sdata;
2500 struct cfg80211_chan_def chandef;
2502 mutex_lock(&local->mtx);
2503 mutex_lock(&local->iflist_mtx);
2504 list_for_each_entry(sdata, &local->interfaces, list) {
2505 /* it might be waiting for the local->mtx, but then
2506 * by the time it gets it, sdata->wdev.cac_started
2507 * will no longer be true
2509 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2511 if (sdata->wdev.cac_started) {
2512 chandef = sdata->vif.bss_conf.chandef;
2513 ieee80211_vif_release_channel(sdata);
2514 cfg80211_cac_event(sdata->dev,
2516 NL80211_RADAR_CAC_ABORTED,
2520 mutex_unlock(&local->iflist_mtx);
2521 mutex_unlock(&local->mtx);
2524 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2526 struct ieee80211_local *local =
2527 container_of(work, struct ieee80211_local, radar_detected_work);
2528 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2530 ieee80211_dfs_cac_cancel(local);
2532 if (local->use_chanctx)
2533 /* currently not handled */
2536 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2539 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2541 struct ieee80211_local *local = hw_to_local(hw);
2543 trace_api_radar_detected(local);
2545 ieee80211_queue_work(hw, &local->radar_detected_work);
2547 EXPORT_SYMBOL(ieee80211_radar_detected);
2549 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2555 case NL80211_CHAN_WIDTH_20:
2556 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2557 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2559 case NL80211_CHAN_WIDTH_40:
2560 c->width = NL80211_CHAN_WIDTH_20;
2561 c->center_freq1 = c->chan->center_freq;
2562 ret = IEEE80211_STA_DISABLE_40MHZ |
2563 IEEE80211_STA_DISABLE_VHT;
2565 case NL80211_CHAN_WIDTH_80:
2566 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2570 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2571 c->width = NL80211_CHAN_WIDTH_40;
2572 ret = IEEE80211_STA_DISABLE_VHT;
2574 case NL80211_CHAN_WIDTH_80P80:
2575 c->center_freq2 = 0;
2576 c->width = NL80211_CHAN_WIDTH_80;
2577 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2578 IEEE80211_STA_DISABLE_160MHZ;
2580 case NL80211_CHAN_WIDTH_160:
2582 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2585 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2586 c->width = NL80211_CHAN_WIDTH_80;
2587 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2588 IEEE80211_STA_DISABLE_160MHZ;
2591 case NL80211_CHAN_WIDTH_20_NOHT:
2593 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2594 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2596 case NL80211_CHAN_WIDTH_5:
2597 case NL80211_CHAN_WIDTH_10:
2600 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2604 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2610 * Returns true if smps_mode_new is strictly more restrictive than
2613 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2614 enum ieee80211_smps_mode smps_mode_new)
2616 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2617 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2620 switch (smps_mode_old) {
2621 case IEEE80211_SMPS_STATIC:
2623 case IEEE80211_SMPS_DYNAMIC:
2624 return smps_mode_new == IEEE80211_SMPS_STATIC;
2625 case IEEE80211_SMPS_OFF:
2626 return smps_mode_new != IEEE80211_SMPS_OFF;
2634 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2635 struct cfg80211_csa_settings *csa_settings)
2637 struct sk_buff *skb;
2638 struct ieee80211_mgmt *mgmt;
2639 struct ieee80211_local *local = sdata->local;
2641 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2642 sizeof(mgmt->u.action.u.chan_switch);
2645 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2646 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2649 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2650 5 + /* channel switch announcement element */
2651 3 + /* secondary channel offset element */
2652 8); /* mesh channel switch parameters element */
2656 skb_reserve(skb, local->tx_headroom);
2657 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2658 memset(mgmt, 0, hdr_len);
2659 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2660 IEEE80211_STYPE_ACTION);
2662 eth_broadcast_addr(mgmt->da);
2663 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2664 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2665 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2667 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2668 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2670 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2671 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2672 pos = skb_put(skb, 5);
2673 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2674 *pos++ = 3; /* IE length */
2675 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2676 freq = csa_settings->chandef.chan->center_freq;
2677 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2678 *pos++ = csa_settings->count; /* count */
2680 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2681 enum nl80211_channel_type ch_type;
2684 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2685 *pos++ = 1; /* IE length */
2686 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2687 if (ch_type == NL80211_CHAN_HT40PLUS)
2688 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2690 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2693 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2694 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2697 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2698 *pos++ = 6; /* IE length */
2699 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2700 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2701 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2702 *pos++ |= csa_settings->block_tx ?
2703 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2704 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2706 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2710 ieee80211_tx_skb(sdata, skb);
2714 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2716 return !(cs == NULL || cs->cipher == 0 ||
2717 cs->hdr_len < cs->pn_len + cs->pn_off ||
2718 cs->hdr_len <= cs->key_idx_off ||
2719 cs->key_idx_shift > 7 ||
2720 cs->key_idx_mask == 0);
2723 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2727 /* Ensure we have enough iftype bitmap space for all iftype values */
2728 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2730 for (i = 0; i < n; i++)
2731 if (!ieee80211_cs_valid(&cs[i]))
2737 const struct ieee80211_cipher_scheme *
2738 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2739 enum nl80211_iftype iftype)
2741 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2742 int n = local->hw.n_cipher_schemes;
2744 const struct ieee80211_cipher_scheme *cs = NULL;
2746 for (i = 0; i < n; i++) {
2747 if (l[i].cipher == cipher) {
2753 if (!cs || !(cs->iftype & BIT(iftype)))
2759 int ieee80211_cs_headroom(struct ieee80211_local *local,
2760 struct cfg80211_crypto_settings *crypto,
2761 enum nl80211_iftype iftype)
2763 const struct ieee80211_cipher_scheme *cs;
2764 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2767 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2768 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2771 if (cs && headroom < cs->hdr_len)
2772 headroom = cs->hdr_len;
2775 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2776 if (cs && headroom < cs->hdr_len)
2777 headroom = cs->hdr_len;
2783 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2785 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2791 /* End time is in the past, check for repetitions */
2792 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2793 if (data->count[i] < 255) {
2794 if (data->count[i] <= skip) {
2799 data->count[i] -= skip;
2802 data->desc[i].start += skip * data->desc[i].interval;
2808 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2814 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2817 if (!data->count[i])
2820 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2823 cur = data->desc[i].start - tsf;
2827 cur = data->desc[i].start + data->desc[i].duration - tsf;
2836 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2841 * arbitrary limit, used to avoid infinite loops when combined NoA
2842 * descriptors cover the full time period.
2846 ieee80211_extend_absent_time(data, tsf, &offset);
2848 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2852 } while (tries < max_tries);
2857 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2859 u32 next_offset = BIT(31) - 1;
2863 data->has_next_tsf = false;
2864 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2867 if (!data->count[i])
2870 ieee80211_extend_noa_desc(data, tsf, i);
2871 start = data->desc[i].start - tsf;
2873 data->absent |= BIT(i);
2875 if (next_offset > start)
2876 next_offset = start;
2878 data->has_next_tsf = true;
2882 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2884 data->next_tsf = tsf + next_offset;
2886 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2888 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2889 struct ieee80211_noa_data *data, u32 tsf)
2894 memset(data, 0, sizeof(*data));
2896 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2897 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2899 if (!desc->count || !desc->duration)
2902 data->count[i] = desc->count;
2903 data->desc[i].start = le32_to_cpu(desc->start_time);
2904 data->desc[i].duration = le32_to_cpu(desc->duration);
2905 data->desc[i].interval = le32_to_cpu(desc->interval);
2907 if (data->count[i] > 1 &&
2908 data->desc[i].interval < data->desc[i].duration)
2911 ieee80211_extend_noa_desc(data, tsf, i);
2916 ieee80211_update_p2p_noa(data, tsf);
2920 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2922 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2923 struct ieee80211_sub_if_data *sdata)
2925 u64 tsf = drv_get_tsf(local, sdata);
2927 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2928 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2932 if (tsf == -1ULL || !beacon_int || !dtim_period)
2935 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2936 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2940 ps = &sdata->bss->ps;
2941 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2942 ps = &sdata->u.mesh.ps;
2948 * actually finds last dtim_count, mac80211 will update in
2949 * __beacon_add_tim().
2950 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2952 do_div(tsf, beacon_int);
2953 bcns_from_dtim = do_div(tsf, dtim_period);
2954 /* just had a DTIM */
2955 if (!bcns_from_dtim)
2958 dtim_count = dtim_period - bcns_from_dtim;
2960 ps->dtim_count = dtim_count;
2963 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
2964 struct ieee80211_chanctx *ctx)
2966 struct ieee80211_sub_if_data *sdata;
2967 u8 radar_detect = 0;
2969 lockdep_assert_held(&local->chanctx_mtx);
2971 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
2974 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
2975 if (sdata->reserved_radar_required)
2976 radar_detect |= BIT(sdata->reserved_chandef.width);
2979 * An in-place reservation context should not have any assigned vifs
2980 * until it replaces the other context.
2982 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
2983 !list_empty(&ctx->assigned_vifs));
2985 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
2986 if (sdata->radar_required)
2987 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
2989 return radar_detect;
2992 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2993 const struct cfg80211_chan_def *chandef,
2994 enum ieee80211_chanctx_mode chanmode,
2997 struct ieee80211_local *local = sdata->local;
2998 struct ieee80211_sub_if_data *sdata_iter;
2999 enum nl80211_iftype iftype = sdata->wdev.iftype;
3000 int num[NUM_NL80211_IFTYPES];
3001 struct ieee80211_chanctx *ctx;
3002 int num_different_channels = 0;
3005 lockdep_assert_held(&local->chanctx_mtx);
3007 if (WARN_ON(hweight32(radar_detect) > 1))
3010 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3015 num_different_channels = 1;
3017 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3020 /* Always allow software iftypes */
3021 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3027 memset(num, 0, sizeof(num));
3029 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3032 list_for_each_entry(ctx, &local->chanctx_list, list) {
3033 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3035 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3036 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3037 num_different_channels++;
3040 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3041 cfg80211_chandef_compatible(chandef,
3044 num_different_channels++;
3047 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3048 struct wireless_dev *wdev_iter;
3050 wdev_iter = &sdata_iter->wdev;
3052 if (sdata_iter == sdata ||
3053 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3054 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3057 num[wdev_iter->iftype]++;
3061 if (total == 1 && !radar_detect)
3064 return cfg80211_check_combinations(local->hw.wiphy,
3065 num_different_channels,
3070 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3073 u32 *max_num_different_channels = data;
3075 *max_num_different_channels = max(*max_num_different_channels,
3076 c->num_different_channels);
3079 int ieee80211_max_num_channels(struct ieee80211_local *local)
3081 struct ieee80211_sub_if_data *sdata;
3082 int num[NUM_NL80211_IFTYPES] = {};
3083 struct ieee80211_chanctx *ctx;
3084 int num_different_channels = 0;
3085 u8 radar_detect = 0;
3086 u32 max_num_different_channels = 1;
3089 lockdep_assert_held(&local->chanctx_mtx);
3091 list_for_each_entry(ctx, &local->chanctx_list, list) {
3092 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3095 num_different_channels++;
3097 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3100 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3101 num[sdata->wdev.iftype]++;
3103 err = cfg80211_iter_combinations(local->hw.wiphy,
3104 num_different_channels, radar_detect,
3105 num, ieee80211_iter_max_chans,
3106 &max_num_different_channels);
3110 return max_num_different_channels;
3113 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3115 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3116 *buf++ = 7; /* len */
3117 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3120 *buf++ = 2; /* WME */
3121 *buf++ = 0; /* WME info */
3122 *buf++ = 1; /* WME ver */
3123 *buf++ = qosinfo; /* U-APSD no in use */