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 void *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)
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
123 if (band == IEEE80211_BAND_5GHZ || erp) {
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
137 dur = 16; /* SIFS + signal ext */
138 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate); /* T_SYM x N_SYM */
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
153 dur = 10; /* aSIFSTime = 10 usec */
154 dur += short_preamble ? (72 + 24) : (144 + 48);
156 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
162 /* Exported duration function for driver use */
163 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164 struct ieee80211_vif *vif,
165 enum ieee80211_band band,
167 struct ieee80211_rate *rate)
169 struct ieee80211_sub_if_data *sdata;
172 bool short_preamble = false;
176 sdata = vif_to_sdata(vif);
177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
185 return cpu_to_le16(dur);
187 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
189 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190 struct ieee80211_vif *vif, size_t frame_len,
191 const struct ieee80211_tx_info *frame_txctl)
193 struct ieee80211_local *local = hw_to_local(hw);
194 struct ieee80211_rate *rate;
195 struct ieee80211_sub_if_data *sdata;
199 struct ieee80211_supported_band *sband;
201 sband = local->hw.wiphy->bands[frame_txctl->band];
203 short_preamble = false;
205 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
209 sdata = vif_to_sdata(vif);
210 short_preamble = sdata->vif.bss_conf.use_short_preamble;
211 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212 erp = rate->flags & IEEE80211_RATE_ERP_G;
216 dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
217 erp, short_preamble);
218 /* Data frame duration */
219 dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
220 erp, short_preamble);
222 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
223 erp, short_preamble);
225 return cpu_to_le16(dur);
227 EXPORT_SYMBOL(ieee80211_rts_duration);
229 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230 struct ieee80211_vif *vif,
232 const struct ieee80211_tx_info *frame_txctl)
234 struct ieee80211_local *local = hw_to_local(hw);
235 struct ieee80211_rate *rate;
236 struct ieee80211_sub_if_data *sdata;
240 struct ieee80211_supported_band *sband;
242 sband = local->hw.wiphy->bands[frame_txctl->band];
244 short_preamble = false;
246 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
249 sdata = vif_to_sdata(vif);
250 short_preamble = sdata->vif.bss_conf.use_short_preamble;
251 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252 erp = rate->flags & IEEE80211_RATE_ERP_G;
255 /* Data frame duration */
256 dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
257 erp, short_preamble);
258 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
260 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
261 erp, short_preamble);
264 return cpu_to_le16(dur);
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
268 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
270 struct ieee80211_sub_if_data *sdata;
271 int n_acs = IEEE80211_NUM_ACS;
273 if (local->hw.queues < IEEE80211_NUM_ACS)
276 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
282 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
285 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
286 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
289 for (ac = 0; ac < n_acs; ac++) {
290 int ac_queue = sdata->vif.hw_queue[ac];
292 if (ac_queue == queue ||
293 (sdata->vif.cab_queue == queue &&
294 local->queue_stop_reasons[ac_queue] == 0 &&
295 skb_queue_empty(&local->pending[ac_queue])))
296 netif_wake_subqueue(sdata->dev, ac);
301 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
302 enum queue_stop_reason reason)
304 struct ieee80211_local *local = hw_to_local(hw);
306 trace_wake_queue(local, queue, reason);
308 if (WARN_ON(queue >= hw->queues))
311 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
314 __clear_bit(reason, &local->queue_stop_reasons[queue]);
316 if (local->queue_stop_reasons[queue] != 0)
317 /* someone still has this queue stopped */
320 if (skb_queue_empty(&local->pending[queue])) {
322 ieee80211_propagate_queue_wake(local, queue);
325 tasklet_schedule(&local->tx_pending_tasklet);
328 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
329 enum queue_stop_reason reason)
331 struct ieee80211_local *local = hw_to_local(hw);
334 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335 __ieee80211_wake_queue(hw, queue, reason);
336 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
339 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
341 ieee80211_wake_queue_by_reason(hw, queue,
342 IEEE80211_QUEUE_STOP_REASON_DRIVER);
344 EXPORT_SYMBOL(ieee80211_wake_queue);
346 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
349 struct ieee80211_local *local = hw_to_local(hw);
350 struct ieee80211_sub_if_data *sdata;
351 int n_acs = IEEE80211_NUM_ACS;
353 trace_stop_queue(local, queue, reason);
355 if (WARN_ON(queue >= hw->queues))
358 if (test_bit(reason, &local->queue_stop_reasons[queue]))
361 __set_bit(reason, &local->queue_stop_reasons[queue]);
363 if (local->hw.queues < IEEE80211_NUM_ACS)
367 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
373 for (ac = 0; ac < n_acs; ac++) {
374 if (sdata->vif.hw_queue[ac] == queue ||
375 sdata->vif.cab_queue == queue)
376 netif_stop_subqueue(sdata->dev, ac);
382 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
383 enum queue_stop_reason reason)
385 struct ieee80211_local *local = hw_to_local(hw);
388 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
389 __ieee80211_stop_queue(hw, queue, reason);
390 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
393 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
395 ieee80211_stop_queue_by_reason(hw, queue,
396 IEEE80211_QUEUE_STOP_REASON_DRIVER);
398 EXPORT_SYMBOL(ieee80211_stop_queue);
400 void ieee80211_add_pending_skb(struct ieee80211_local *local,
403 struct ieee80211_hw *hw = &local->hw;
405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
406 int queue = info->hw_queue;
408 if (WARN_ON(!info->control.vif)) {
409 ieee80211_free_txskb(&local->hw, skb);
413 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
414 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
415 __skb_queue_tail(&local->pending[queue], skb);
416 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
417 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
420 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
421 struct sk_buff_head *skbs,
422 void (*fn)(void *data), void *data)
424 struct ieee80211_hw *hw = &local->hw;
429 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
430 while ((skb = skb_dequeue(skbs))) {
431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
433 if (WARN_ON(!info->control.vif)) {
434 ieee80211_free_txskb(&local->hw, skb);
438 queue = info->hw_queue;
440 __ieee80211_stop_queue(hw, queue,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
443 __skb_queue_tail(&local->pending[queue], skb);
449 for (i = 0; i < hw->queues; i++)
450 __ieee80211_wake_queue(hw, i,
451 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
452 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
455 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
456 unsigned long queues,
457 enum queue_stop_reason reason)
459 struct ieee80211_local *local = hw_to_local(hw);
463 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
465 for_each_set_bit(i, &queues, hw->queues)
466 __ieee80211_stop_queue(hw, i, reason);
468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
471 void ieee80211_stop_queues(struct ieee80211_hw *hw)
473 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
474 IEEE80211_QUEUE_STOP_REASON_DRIVER);
476 EXPORT_SYMBOL(ieee80211_stop_queues);
478 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
480 struct ieee80211_local *local = hw_to_local(hw);
484 if (WARN_ON(queue >= hw->queues))
487 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
488 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
489 &local->queue_stop_reasons[queue]);
490 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
493 EXPORT_SYMBOL(ieee80211_queue_stopped);
495 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
496 unsigned long queues,
497 enum queue_stop_reason reason)
499 struct ieee80211_local *local = hw_to_local(hw);
503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
505 for_each_set_bit(i, &queues, hw->queues)
506 __ieee80211_wake_queue(hw, i, reason);
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
511 void ieee80211_wake_queues(struct ieee80211_hw *hw)
513 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
514 IEEE80211_QUEUE_STOP_REASON_DRIVER);
516 EXPORT_SYMBOL(ieee80211_wake_queues);
518 void ieee80211_flush_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
523 if (!local->ops->flush)
526 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
531 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
532 queues |= BIT(sdata->vif.hw_queue[ac]);
533 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
534 queues |= BIT(sdata->vif.cab_queue);
537 queues = BIT(local->hw.queues) - 1;
540 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
541 IEEE80211_QUEUE_STOP_REASON_FLUSH);
543 drv_flush(local, queues, false);
545 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
546 IEEE80211_QUEUE_STOP_REASON_FLUSH);
549 void ieee80211_iterate_active_interfaces(
550 struct ieee80211_hw *hw, u32 iter_flags,
551 void (*iterator)(void *data, u8 *mac,
552 struct ieee80211_vif *vif),
555 struct ieee80211_local *local = hw_to_local(hw);
556 struct ieee80211_sub_if_data *sdata;
558 mutex_lock(&local->iflist_mtx);
560 list_for_each_entry(sdata, &local->interfaces, list) {
561 switch (sdata->vif.type) {
562 case NL80211_IFTYPE_MONITOR:
563 case NL80211_IFTYPE_AP_VLAN:
568 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
569 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
571 if (ieee80211_sdata_running(sdata))
572 iterator(data, sdata->vif.addr,
576 sdata = rcu_dereference_protected(local->monitor_sdata,
577 lockdep_is_held(&local->iflist_mtx));
579 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
580 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
581 iterator(data, sdata->vif.addr, &sdata->vif);
583 mutex_unlock(&local->iflist_mtx);
585 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
587 void ieee80211_iterate_active_interfaces_atomic(
588 struct ieee80211_hw *hw, u32 iter_flags,
589 void (*iterator)(void *data, u8 *mac,
590 struct ieee80211_vif *vif),
593 struct ieee80211_local *local = hw_to_local(hw);
594 struct ieee80211_sub_if_data *sdata;
598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
599 switch (sdata->vif.type) {
600 case NL80211_IFTYPE_MONITOR:
601 case NL80211_IFTYPE_AP_VLAN:
606 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
607 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
609 if (ieee80211_sdata_running(sdata))
610 iterator(data, sdata->vif.addr,
614 sdata = rcu_dereference(local->monitor_sdata);
616 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
617 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
618 iterator(data, sdata->vif.addr, &sdata->vif);
622 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
625 * Nothing should have been stuffed into the workqueue during
626 * the suspend->resume cycle. If this WARN is seen then there
627 * is a bug with either the driver suspend or something in
628 * mac80211 stuffing into the workqueue which we haven't yet
629 * cleared during mac80211's suspend cycle.
631 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
633 if (WARN(local->suspended && !local->resuming,
634 "queueing ieee80211 work while going to suspend\n"))
640 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
642 struct ieee80211_local *local = hw_to_local(hw);
644 if (!ieee80211_can_queue_work(local))
647 queue_work(local->workqueue, work);
649 EXPORT_SYMBOL(ieee80211_queue_work);
651 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
652 struct delayed_work *dwork,
655 struct ieee80211_local *local = hw_to_local(hw);
657 if (!ieee80211_can_queue_work(local))
660 queue_delayed_work(local->workqueue, dwork, delay);
662 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
664 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, bool action,
665 struct ieee802_11_elems *elems,
670 bool calc_crc = filter != 0;
671 DECLARE_BITMAP(seen_elems, 256);
674 bitmap_zero(seen_elems, 256);
675 memset(elems, 0, sizeof(*elems));
676 elems->ie_start = start;
677 elems->total_len = len;
681 bool elem_parse_failed;
688 elems->parse_error = true;
694 case WLAN_EID_SUPP_RATES:
695 case WLAN_EID_FH_PARAMS:
696 case WLAN_EID_DS_PARAMS:
697 case WLAN_EID_CF_PARAMS:
699 case WLAN_EID_IBSS_PARAMS:
700 case WLAN_EID_CHALLENGE:
702 case WLAN_EID_ERP_INFO:
703 case WLAN_EID_EXT_SUPP_RATES:
704 case WLAN_EID_HT_CAPABILITY:
705 case WLAN_EID_HT_OPERATION:
706 case WLAN_EID_VHT_CAPABILITY:
707 case WLAN_EID_VHT_OPERATION:
708 case WLAN_EID_MESH_ID:
709 case WLAN_EID_MESH_CONFIG:
710 case WLAN_EID_PEER_MGMT:
715 case WLAN_EID_CHANNEL_SWITCH:
716 case WLAN_EID_EXT_CHANSWITCH_ANN:
717 case WLAN_EID_COUNTRY:
718 case WLAN_EID_PWR_CONSTRAINT:
719 case WLAN_EID_TIMEOUT_INTERVAL:
720 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
721 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
723 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
724 * that if the content gets bigger it might be needed more than once
726 if (test_bit(id, seen_elems)) {
727 elems->parse_error = true;
735 if (calc_crc && id < 64 && (filter & (1ULL << id)))
736 crc = crc32_be(crc, pos - 2, elen + 2);
738 elem_parse_failed = false;
743 elems->ssid_len = elen;
745 case WLAN_EID_SUPP_RATES:
746 elems->supp_rates = pos;
747 elems->supp_rates_len = elen;
749 case WLAN_EID_DS_PARAMS:
751 elems->ds_params = pos;
753 elem_parse_failed = true;
756 if (elen >= sizeof(struct ieee80211_tim_ie)) {
757 elems->tim = (void *)pos;
758 elems->tim_len = elen;
760 elem_parse_failed = true;
762 case WLAN_EID_CHALLENGE:
763 elems->challenge = pos;
764 elems->challenge_len = elen;
766 case WLAN_EID_VENDOR_SPECIFIC:
767 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
769 /* Microsoft OUI (00:50:F2) */
772 crc = crc32_be(crc, pos - 2, elen + 2);
774 if (elen >= 5 && pos[3] == 2) {
775 /* OUI Type 2 - WMM IE */
777 elems->wmm_info = pos;
778 elems->wmm_info_len = elen;
779 } else if (pos[4] == 1) {
780 elems->wmm_param = pos;
781 elems->wmm_param_len = elen;
788 elems->rsn_len = elen;
790 case WLAN_EID_ERP_INFO:
792 elems->erp_info = pos;
794 elem_parse_failed = true;
796 case WLAN_EID_EXT_SUPP_RATES:
797 elems->ext_supp_rates = pos;
798 elems->ext_supp_rates_len = elen;
800 case WLAN_EID_HT_CAPABILITY:
801 if (elen >= sizeof(struct ieee80211_ht_cap))
802 elems->ht_cap_elem = (void *)pos;
804 elem_parse_failed = true;
806 case WLAN_EID_HT_OPERATION:
807 if (elen >= sizeof(struct ieee80211_ht_operation))
808 elems->ht_operation = (void *)pos;
810 elem_parse_failed = true;
812 case WLAN_EID_VHT_CAPABILITY:
813 if (elen >= sizeof(struct ieee80211_vht_cap))
814 elems->vht_cap_elem = (void *)pos;
816 elem_parse_failed = true;
818 case WLAN_EID_VHT_OPERATION:
819 if (elen >= sizeof(struct ieee80211_vht_operation))
820 elems->vht_operation = (void *)pos;
822 elem_parse_failed = true;
824 case WLAN_EID_OPMODE_NOTIF:
826 elems->opmode_notif = pos;
828 elem_parse_failed = true;
830 case WLAN_EID_MESH_ID:
831 elems->mesh_id = pos;
832 elems->mesh_id_len = elen;
834 case WLAN_EID_MESH_CONFIG:
835 if (elen >= sizeof(struct ieee80211_meshconf_ie))
836 elems->mesh_config = (void *)pos;
838 elem_parse_failed = true;
840 case WLAN_EID_PEER_MGMT:
841 elems->peering = pos;
842 elems->peering_len = elen;
844 case WLAN_EID_MESH_AWAKE_WINDOW:
846 elems->awake_window = (void *)pos;
850 elems->preq_len = elen;
854 elems->prep_len = elen;
858 elems->perr_len = elen;
861 if (elen >= sizeof(struct ieee80211_rann_ie))
862 elems->rann = (void *)pos;
864 elem_parse_failed = true;
866 case WLAN_EID_CHANNEL_SWITCH:
867 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
868 elem_parse_failed = true;
871 elems->ch_switch_ie = (void *)pos;
873 case WLAN_EID_EXT_CHANSWITCH_ANN:
874 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
875 elem_parse_failed = true;
878 elems->ext_chansw_ie = (void *)pos;
880 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
881 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
882 elem_parse_failed = true;
885 elems->sec_chan_offs = (void *)pos;
887 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
889 elen != sizeof(*elems->wide_bw_chansw_ie)) {
890 elem_parse_failed = true;
893 elems->wide_bw_chansw_ie = (void *)pos;
895 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
897 elem_parse_failed = true;
901 * This is a bit tricky, but as we only care about
902 * the wide bandwidth channel switch element, so
903 * just parse it out manually.
905 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
908 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
909 elems->wide_bw_chansw_ie =
912 elem_parse_failed = true;
915 case WLAN_EID_COUNTRY:
916 elems->country_elem = pos;
917 elems->country_elem_len = elen;
919 case WLAN_EID_PWR_CONSTRAINT:
921 elem_parse_failed = true;
924 elems->pwr_constr_elem = pos;
926 case WLAN_EID_TIMEOUT_INTERVAL:
927 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
928 elems->timeout_int = (void *)pos;
930 elem_parse_failed = true;
936 if (elem_parse_failed)
937 elems->parse_error = true;
939 __set_bit(id, seen_elems);
946 elems->parse_error = true;
951 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
954 struct ieee80211_local *local = sdata->local;
955 struct ieee80211_tx_queue_params qparam;
956 struct ieee80211_chanctx_conf *chanctx_conf;
958 bool use_11b, enable_qos;
961 if (!local->ops->conf_tx)
964 if (local->hw.queues < IEEE80211_NUM_ACS)
967 memset(&qparam, 0, sizeof(qparam));
970 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
971 use_11b = (chanctx_conf &&
972 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
973 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
977 * By default disable QoS in STA mode for old access points, which do
978 * not support 802.11e. New APs will provide proper queue parameters,
979 * that we will configure later.
981 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
983 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
984 /* Set defaults according to 802.11-2007 Table 7-37 */
993 case IEEE80211_AC_BK:
994 qparam.cw_max = aCWmax;
995 qparam.cw_min = aCWmin;
999 /* never happens but let's not leave undefined */
1001 case IEEE80211_AC_BE:
1002 qparam.cw_max = aCWmax;
1003 qparam.cw_min = aCWmin;
1007 case IEEE80211_AC_VI:
1008 qparam.cw_max = aCWmin;
1009 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1011 qparam.txop = 6016/32;
1013 qparam.txop = 3008/32;
1016 case IEEE80211_AC_VO:
1017 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1018 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1020 qparam.txop = 3264/32;
1022 qparam.txop = 1504/32;
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1034 qparam.uapsd = false;
1036 sdata->tx_conf[ac] = qparam;
1037 drv_conf_tx(local, sdata, ac, &qparam);
1040 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1041 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1042 sdata->vif.bss_conf.qos = enable_qos;
1044 ieee80211_bss_info_change_notify(sdata,
1049 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1050 const size_t supp_rates_len,
1051 const u8 *supp_rates)
1053 struct ieee80211_chanctx_conf *chanctx_conf;
1054 int i, have_higher_than_11mbit = 0;
1056 /* cf. IEEE 802.11 9.2.12 */
1057 for (i = 0; i < supp_rates_len; i++)
1058 if ((supp_rates[i] & 0x7f) * 5 > 110)
1059 have_higher_than_11mbit = 1;
1062 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1065 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
1066 have_higher_than_11mbit)
1067 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1069 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1072 ieee80211_set_wmm_default(sdata, true);
1075 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1076 u16 transaction, u16 auth_alg, u16 status,
1077 const u8 *extra, size_t extra_len, const u8 *da,
1078 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1081 struct ieee80211_local *local = sdata->local;
1082 struct sk_buff *skb;
1083 struct ieee80211_mgmt *mgmt;
1086 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1087 sizeof(*mgmt) + 6 + extra_len);
1091 skb_reserve(skb, local->hw.extra_tx_headroom);
1093 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1094 memset(mgmt, 0, 24 + 6);
1095 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1096 IEEE80211_STYPE_AUTH);
1097 memcpy(mgmt->da, da, ETH_ALEN);
1098 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1099 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1100 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1101 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1102 mgmt->u.auth.status_code = cpu_to_le16(status);
1104 memcpy(skb_put(skb, extra_len), extra, extra_len);
1106 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1107 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1108 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1112 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1114 ieee80211_tx_skb(sdata, skb);
1117 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1118 const u8 *bssid, u16 stype, u16 reason,
1119 bool send_frame, u8 *frame_buf)
1121 struct ieee80211_local *local = sdata->local;
1122 struct sk_buff *skb;
1123 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1126 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1127 mgmt->duration = 0; /* initialize only */
1128 mgmt->seq_ctrl = 0; /* initialize only */
1129 memcpy(mgmt->da, bssid, ETH_ALEN);
1130 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1131 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1132 /* u.deauth.reason_code == u.disassoc.reason_code */
1133 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1136 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1137 IEEE80211_DEAUTH_FRAME_LEN);
1141 skb_reserve(skb, local->hw.extra_tx_headroom);
1144 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1145 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1147 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1148 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1149 IEEE80211_SKB_CB(skb)->flags |=
1150 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1152 ieee80211_tx_skb(sdata, skb);
1156 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1157 size_t buffer_len, const u8 *ie, size_t ie_len,
1158 enum ieee80211_band band, u32 rate_mask,
1161 struct ieee80211_supported_band *sband;
1162 u8 *pos = buffer, *end = buffer + buffer_len;
1163 size_t offset = 0, noffset;
1164 int supp_rates_len, i;
1169 sband = local->hw.wiphy->bands[band];
1170 if (WARN_ON_ONCE(!sband))
1174 for (i = 0; i < sband->n_bitrates; i++) {
1175 if ((BIT(i) & rate_mask) == 0)
1176 continue; /* skip rate */
1177 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1180 supp_rates_len = min_t(int, num_rates, 8);
1182 if (end - pos < 2 + supp_rates_len)
1184 *pos++ = WLAN_EID_SUPP_RATES;
1185 *pos++ = supp_rates_len;
1186 memcpy(pos, rates, supp_rates_len);
1187 pos += supp_rates_len;
1189 /* insert "request information" if in custom IEs */
1191 static const u8 before_extrates[] = {
1193 WLAN_EID_SUPP_RATES,
1196 noffset = ieee80211_ie_split(ie, ie_len,
1198 ARRAY_SIZE(before_extrates),
1200 if (end - pos < noffset - offset)
1202 memcpy(pos, ie + offset, noffset - offset);
1203 pos += noffset - offset;
1207 ext_rates_len = num_rates - supp_rates_len;
1208 if (ext_rates_len > 0) {
1209 if (end - pos < 2 + ext_rates_len)
1211 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1212 *pos++ = ext_rates_len;
1213 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1214 pos += ext_rates_len;
1217 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1220 *pos++ = WLAN_EID_DS_PARAMS;
1225 /* insert custom IEs that go before HT */
1227 static const u8 before_ht[] = {
1229 WLAN_EID_SUPP_RATES,
1231 WLAN_EID_EXT_SUPP_RATES,
1233 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1235 noffset = ieee80211_ie_split(ie, ie_len,
1236 before_ht, ARRAY_SIZE(before_ht),
1238 if (end - pos < noffset - offset)
1240 memcpy(pos, ie + offset, noffset - offset);
1241 pos += noffset - offset;
1245 if (sband->ht_cap.ht_supported) {
1246 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1248 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1253 * If adding more here, adjust code in main.c
1254 * that calculates local->scan_ies_len.
1257 /* add any remaining custom IEs */
1260 if (end - pos < noffset - offset)
1262 memcpy(pos, ie + offset, noffset - offset);
1263 pos += noffset - offset;
1266 if (sband->vht_cap.vht_supported) {
1267 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1269 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1270 sband->vht_cap.cap);
1273 return pos - buffer;
1275 WARN_ONCE(1, "not enough space for preq IEs\n");
1276 return pos - buffer;
1279 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1280 u8 *dst, u32 ratemask,
1281 struct ieee80211_channel *chan,
1282 const u8 *ssid, size_t ssid_len,
1283 const u8 *ie, size_t ie_len,
1286 struct ieee80211_local *local = sdata->local;
1287 struct sk_buff *skb;
1288 struct ieee80211_mgmt *mgmt;
1293 * Do not send DS Channel parameter for directed probe requests
1294 * in order to maximize the chance that we get a response. Some
1295 * badly-behaved APs don't respond when this parameter is included.
1300 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1302 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1303 ssid, ssid_len, 100 + ie_len);
1307 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1309 ie, ie_len, chan->band,
1311 skb_put(skb, ies_len);
1314 mgmt = (struct ieee80211_mgmt *) skb->data;
1315 memcpy(mgmt->da, dst, ETH_ALEN);
1316 memcpy(mgmt->bssid, dst, ETH_ALEN);
1319 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1324 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1325 const u8 *ssid, size_t ssid_len,
1326 const u8 *ie, size_t ie_len,
1327 u32 ratemask, bool directed, u32 tx_flags,
1328 struct ieee80211_channel *channel, bool scan)
1330 struct sk_buff *skb;
1332 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1334 ie, ie_len, directed);
1336 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1338 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1340 ieee80211_tx_skb(sdata, skb);
1344 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1345 struct ieee802_11_elems *elems,
1346 enum ieee80211_band band, u32 *basic_rates)
1348 struct ieee80211_supported_band *sband;
1349 struct ieee80211_rate *bitrates;
1353 sband = local->hw.wiphy->bands[band];
1355 if (WARN_ON(!sband))
1358 bitrates = sband->bitrates;
1359 num_rates = sband->n_bitrates;
1361 for (i = 0; i < elems->supp_rates_len +
1362 elems->ext_supp_rates_len; i++) {
1366 if (i < elems->supp_rates_len)
1367 rate = elems->supp_rates[i];
1368 else if (elems->ext_supp_rates)
1369 rate = elems->ext_supp_rates
1370 [i - elems->supp_rates_len];
1371 own_rate = 5 * (rate & 0x7f);
1372 is_basic = !!(rate & 0x80);
1374 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1377 for (j = 0; j < num_rates; j++) {
1378 if (bitrates[j].bitrate == own_rate) {
1379 supp_rates |= BIT(j);
1380 if (basic_rates && is_basic)
1381 *basic_rates |= BIT(j);
1388 void ieee80211_stop_device(struct ieee80211_local *local)
1390 ieee80211_led_radio(local, false);
1391 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1393 cancel_work_sync(&local->reconfig_filter);
1395 flush_workqueue(local->workqueue);
1399 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1400 struct ieee80211_sub_if_data *sdata)
1402 struct ieee80211_chanctx_conf *conf;
1403 struct ieee80211_chanctx *ctx;
1405 if (!local->use_chanctx)
1408 mutex_lock(&local->chanctx_mtx);
1409 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1410 lockdep_is_held(&local->chanctx_mtx));
1412 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1413 drv_assign_vif_chanctx(local, sdata, ctx);
1415 mutex_unlock(&local->chanctx_mtx);
1418 int ieee80211_reconfig(struct ieee80211_local *local)
1420 struct ieee80211_hw *hw = &local->hw;
1421 struct ieee80211_sub_if_data *sdata;
1422 struct ieee80211_chanctx *ctx;
1423 struct sta_info *sta;
1425 bool reconfig_due_to_wowlan = false;
1428 if (local->suspended)
1429 local->resuming = true;
1431 if (local->wowlan) {
1432 local->wowlan = false;
1433 res = drv_resume(local);
1435 local->resuming = false;
1442 * res is 1, which means the driver requested
1443 * to go through a regular reset on wakeup.
1445 reconfig_due_to_wowlan = true;
1448 /* everything else happens only if HW was up & running */
1449 if (!local->open_count)
1453 * Upon resume hardware can sometimes be goofy due to
1454 * various platform / driver / bus issues, so restarting
1455 * the device may at times not work immediately. Propagate
1458 res = drv_start(local);
1460 WARN(local->suspended, "Hardware became unavailable "
1461 "upon resume. This could be a software issue "
1462 "prior to suspend or a hardware issue.\n");
1466 /* setup fragmentation threshold */
1467 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1469 /* setup RTS threshold */
1470 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1472 /* reset coverage class */
1473 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1475 ieee80211_led_radio(local, true);
1476 ieee80211_mod_tpt_led_trig(local,
1477 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1479 /* add interfaces */
1480 sdata = rtnl_dereference(local->monitor_sdata);
1482 /* in HW restart it exists already */
1483 WARN_ON(local->resuming);
1484 res = drv_add_interface(local, sdata);
1486 rcu_assign_pointer(local->monitor_sdata, NULL);
1492 list_for_each_entry(sdata, &local->interfaces, list) {
1493 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1494 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1495 ieee80211_sdata_running(sdata))
1496 res = drv_add_interface(local, sdata);
1499 /* add channel contexts */
1500 if (local->use_chanctx) {
1501 mutex_lock(&local->chanctx_mtx);
1502 list_for_each_entry(ctx, &local->chanctx_list, list)
1503 WARN_ON(drv_add_chanctx(local, ctx));
1504 mutex_unlock(&local->chanctx_mtx);
1507 list_for_each_entry(sdata, &local->interfaces, list) {
1508 if (!ieee80211_sdata_running(sdata))
1510 ieee80211_assign_chanctx(local, sdata);
1513 sdata = rtnl_dereference(local->monitor_sdata);
1514 if (sdata && ieee80211_sdata_running(sdata))
1515 ieee80211_assign_chanctx(local, sdata);
1518 mutex_lock(&local->sta_mtx);
1519 list_for_each_entry(sta, &local->sta_list, list) {
1520 enum ieee80211_sta_state state;
1525 /* AP-mode stations will be added later */
1526 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1529 for (state = IEEE80211_STA_NOTEXIST;
1530 state < sta->sta_state; state++)
1531 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1534 mutex_unlock(&local->sta_mtx);
1536 /* reconfigure tx conf */
1537 if (hw->queues >= IEEE80211_NUM_ACS) {
1538 list_for_each_entry(sdata, &local->interfaces, list) {
1539 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1540 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1541 !ieee80211_sdata_running(sdata))
1544 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1545 drv_conf_tx(local, sdata, i,
1546 &sdata->tx_conf[i]);
1550 /* reconfigure hardware */
1551 ieee80211_hw_config(local, ~0);
1553 ieee80211_configure_filter(local);
1555 /* Finally also reconfigure all the BSS information */
1556 list_for_each_entry(sdata, &local->interfaces, list) {
1559 if (!ieee80211_sdata_running(sdata))
1562 /* common change flags for all interface types */
1563 changed = BSS_CHANGED_ERP_CTS_PROT |
1564 BSS_CHANGED_ERP_PREAMBLE |
1565 BSS_CHANGED_ERP_SLOT |
1567 BSS_CHANGED_BASIC_RATES |
1568 BSS_CHANGED_BEACON_INT |
1573 BSS_CHANGED_TXPOWER;
1575 switch (sdata->vif.type) {
1576 case NL80211_IFTYPE_STATION:
1577 changed |= BSS_CHANGED_ASSOC |
1578 BSS_CHANGED_ARP_FILTER |
1581 if (sdata->u.mgd.dtim_period)
1582 changed |= BSS_CHANGED_DTIM_PERIOD;
1584 mutex_lock(&sdata->u.mgd.mtx);
1585 ieee80211_bss_info_change_notify(sdata, changed);
1586 mutex_unlock(&sdata->u.mgd.mtx);
1588 case NL80211_IFTYPE_ADHOC:
1589 changed |= BSS_CHANGED_IBSS;
1591 case NL80211_IFTYPE_AP:
1592 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1594 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1595 changed |= BSS_CHANGED_AP_PROBE_RESP;
1597 if (rcu_access_pointer(sdata->u.ap.beacon))
1598 drv_start_ap(local, sdata);
1602 case NL80211_IFTYPE_MESH_POINT:
1603 if (sdata->vif.bss_conf.enable_beacon) {
1604 changed |= BSS_CHANGED_BEACON |
1605 BSS_CHANGED_BEACON_ENABLED;
1606 ieee80211_bss_info_change_notify(sdata, changed);
1609 case NL80211_IFTYPE_WDS:
1611 case NL80211_IFTYPE_AP_VLAN:
1612 case NL80211_IFTYPE_MONITOR:
1613 /* ignore virtual */
1615 case NL80211_IFTYPE_P2P_DEVICE:
1616 changed = BSS_CHANGED_IDLE;
1618 case NL80211_IFTYPE_UNSPECIFIED:
1619 case NUM_NL80211_IFTYPES:
1620 case NL80211_IFTYPE_P2P_CLIENT:
1621 case NL80211_IFTYPE_P2P_GO:
1627 ieee80211_recalc_ps(local, -1);
1630 * The sta might be in psm against the ap (e.g. because
1631 * this was the state before a hw restart), so we
1632 * explicitly send a null packet in order to make sure
1633 * it'll sync against the ap (and get out of psm).
1635 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1636 list_for_each_entry(sdata, &local->interfaces, list) {
1637 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1639 if (!sdata->u.mgd.associated)
1642 ieee80211_send_nullfunc(local, sdata, 0);
1646 /* APs are now beaconing, add back stations */
1647 mutex_lock(&local->sta_mtx);
1648 list_for_each_entry(sta, &local->sta_list, list) {
1649 enum ieee80211_sta_state state;
1654 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1657 for (state = IEEE80211_STA_NOTEXIST;
1658 state < sta->sta_state; state++)
1659 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1662 mutex_unlock(&local->sta_mtx);
1665 list_for_each_entry(sdata, &local->interfaces, list)
1666 if (ieee80211_sdata_running(sdata))
1667 ieee80211_enable_keys(sdata);
1670 local->in_reconfig = false;
1673 if (local->monitors == local->open_count && local->monitors > 0)
1674 ieee80211_add_virtual_monitor(local);
1677 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1678 * sessions can be established after a resume.
1680 * Also tear down aggregation sessions since reconfiguring
1681 * them in a hardware restart scenario is not easily done
1682 * right now, and the hardware will have lost information
1683 * about the sessions, but we and the AP still think they
1684 * are active. This is really a workaround though.
1686 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1687 mutex_lock(&local->sta_mtx);
1689 list_for_each_entry(sta, &local->sta_list, list) {
1690 ieee80211_sta_tear_down_BA_sessions(
1691 sta, AGG_STOP_LOCAL_REQUEST);
1692 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1695 mutex_unlock(&local->sta_mtx);
1698 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1699 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1702 * If this is for hw restart things are still running.
1703 * We may want to change that later, however.
1705 if (!local->suspended || reconfig_due_to_wowlan)
1706 drv_restart_complete(local);
1708 if (!local->suspended)
1712 /* first set suspended false, then resuming */
1713 local->suspended = false;
1715 local->resuming = false;
1717 list_for_each_entry(sdata, &local->interfaces, list) {
1718 if (!ieee80211_sdata_running(sdata))
1720 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1721 ieee80211_sta_restart(sdata);
1724 mod_timer(&local->sta_cleanup, jiffies + 1);
1731 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1733 struct ieee80211_sub_if_data *sdata;
1734 struct ieee80211_local *local;
1735 struct ieee80211_key *key;
1740 sdata = vif_to_sdata(vif);
1741 local = sdata->local;
1743 if (WARN_ON(!local->resuming))
1746 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1749 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1751 mutex_lock(&local->key_mtx);
1752 list_for_each_entry(key, &sdata->key_list, list)
1753 key->flags |= KEY_FLAG_TAINTED;
1754 mutex_unlock(&local->key_mtx);
1756 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1758 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1760 struct ieee80211_local *local = sdata->local;
1761 struct ieee80211_chanctx_conf *chanctx_conf;
1762 struct ieee80211_chanctx *chanctx;
1764 mutex_lock(&local->chanctx_mtx);
1766 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1767 lockdep_is_held(&local->chanctx_mtx));
1769 if (WARN_ON_ONCE(!chanctx_conf))
1772 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1773 ieee80211_recalc_smps_chanctx(local, chanctx);
1775 mutex_unlock(&local->chanctx_mtx);
1778 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1782 for (i = 0; i < n_ids; i++)
1789 * ieee80211_ie_split - split an IE buffer according to ordering
1791 * @ies: the IE buffer
1792 * @ielen: the length of the IE buffer
1793 * @ids: an array with element IDs that are allowed before
1795 * @n_ids: the size of the element ID array
1796 * @offset: offset where to start splitting in the buffer
1798 * This function splits an IE buffer by updating the @offset
1799 * variable to point to the location where the buffer should be
1802 * It assumes that the given IE buffer is well-formed, this
1803 * has to be guaranteed by the caller!
1805 * It also assumes that the IEs in the buffer are ordered
1806 * correctly, if not the result of using this function will not
1807 * be ordered correctly either, i.e. it does no reordering.
1809 * The function returns the offset where the next part of the
1810 * buffer starts, which may be @ielen if the entire (remainder)
1811 * of the buffer should be used.
1813 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1814 const u8 *ids, int n_ids, size_t offset)
1816 size_t pos = offset;
1818 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1819 pos += 2 + ies[pos + 1];
1824 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1826 size_t pos = offset;
1828 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1829 pos += 2 + ies[pos + 1];
1834 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1838 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1840 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1844 * Scale up threshold values before storing it, as the RSSI averaging
1845 * algorithm uses a scaled up value as well. Change this scaling
1846 * factor if the RSSI averaging algorithm changes.
1848 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1849 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1852 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1856 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1858 WARN_ON(rssi_min_thold == rssi_max_thold ||
1859 rssi_min_thold > rssi_max_thold);
1861 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1864 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1866 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1868 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1870 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1872 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1874 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1879 *pos++ = WLAN_EID_HT_CAPABILITY;
1880 *pos++ = sizeof(struct ieee80211_ht_cap);
1881 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1883 /* capability flags */
1884 tmp = cpu_to_le16(cap);
1885 memcpy(pos, &tmp, sizeof(u16));
1888 /* AMPDU parameters */
1889 *pos++ = ht_cap->ampdu_factor |
1890 (ht_cap->ampdu_density <<
1891 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1894 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1895 pos += sizeof(ht_cap->mcs);
1897 /* extended capabilities */
1898 pos += sizeof(__le16);
1900 /* BF capabilities */
1901 pos += sizeof(__le32);
1903 /* antenna selection */
1909 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1914 *pos++ = WLAN_EID_VHT_CAPABILITY;
1915 *pos++ = sizeof(struct ieee80211_vht_cap);
1916 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1918 /* capability flags */
1919 tmp = cpu_to_le32(cap);
1920 memcpy(pos, &tmp, sizeof(u32));
1924 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1925 pos += sizeof(vht_cap->vht_mcs);
1930 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1931 const struct cfg80211_chan_def *chandef,
1934 struct ieee80211_ht_operation *ht_oper;
1935 /* Build HT Information */
1936 *pos++ = WLAN_EID_HT_OPERATION;
1937 *pos++ = sizeof(struct ieee80211_ht_operation);
1938 ht_oper = (struct ieee80211_ht_operation *)pos;
1939 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1940 chandef->chan->center_freq);
1941 switch (chandef->width) {
1942 case NL80211_CHAN_WIDTH_160:
1943 case NL80211_CHAN_WIDTH_80P80:
1944 case NL80211_CHAN_WIDTH_80:
1945 case NL80211_CHAN_WIDTH_40:
1946 if (chandef->center_freq1 > chandef->chan->center_freq)
1947 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1949 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1952 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1955 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1956 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1957 chandef->width != NL80211_CHAN_WIDTH_20)
1958 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1960 ht_oper->operation_mode = cpu_to_le16(prot_mode);
1961 ht_oper->stbc_param = 0x0000;
1963 /* It seems that Basic MCS set and Supported MCS set
1964 are identical for the first 10 bytes */
1965 memset(&ht_oper->basic_set, 0, 16);
1966 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1968 return pos + sizeof(struct ieee80211_ht_operation);
1971 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1972 const struct ieee80211_ht_operation *ht_oper,
1973 struct cfg80211_chan_def *chandef)
1975 enum nl80211_channel_type channel_type;
1978 cfg80211_chandef_create(chandef, control_chan,
1979 NL80211_CHAN_NO_HT);
1983 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1984 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1985 channel_type = NL80211_CHAN_HT20;
1987 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1988 channel_type = NL80211_CHAN_HT40PLUS;
1990 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1991 channel_type = NL80211_CHAN_HT40MINUS;
1994 channel_type = NL80211_CHAN_NO_HT;
1997 cfg80211_chandef_create(chandef, control_chan, channel_type);
2000 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2001 struct sk_buff *skb, bool need_basic,
2002 enum ieee80211_band band)
2004 struct ieee80211_local *local = sdata->local;
2005 struct ieee80211_supported_band *sband;
2008 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2010 sband = local->hw.wiphy->bands[band];
2011 rates = sband->n_bitrates;
2015 if (skb_tailroom(skb) < rates + 2)
2018 pos = skb_put(skb, rates + 2);
2019 *pos++ = WLAN_EID_SUPP_RATES;
2021 for (i = 0; i < rates; i++) {
2023 if (need_basic && basic_rates & BIT(i))
2025 rate = sband->bitrates[i].bitrate;
2026 *pos++ = basic | (u8) (rate / 5);
2032 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2033 struct sk_buff *skb, bool need_basic,
2034 enum ieee80211_band band)
2036 struct ieee80211_local *local = sdata->local;
2037 struct ieee80211_supported_band *sband;
2039 u8 i, exrates, *pos;
2040 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2042 sband = local->hw.wiphy->bands[band];
2043 exrates = sband->n_bitrates;
2049 if (skb_tailroom(skb) < exrates + 2)
2053 pos = skb_put(skb, exrates + 2);
2054 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2056 for (i = 8; i < sband->n_bitrates; i++) {
2058 if (need_basic && basic_rates & BIT(i))
2060 rate = sband->bitrates[i].bitrate;
2061 *pos++ = basic | (u8) (rate / 5);
2067 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2069 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2072 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2073 /* non-managed type inferfaces */
2076 return ifmgd->ave_beacon_signal / 16;
2078 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2080 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2085 /* TODO: consider rx_highest */
2087 if (mcs->rx_mask[3])
2089 if (mcs->rx_mask[2])
2091 if (mcs->rx_mask[1])
2097 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2098 * @local: mac80211 hw info struct
2099 * @status: RX status
2100 * @mpdu_len: total MPDU length (including FCS)
2101 * @mpdu_offset: offset into MPDU to calculate timestamp at
2103 * This function calculates the RX timestamp at the given MPDU offset, taking
2104 * into account what the RX timestamp was. An offset of 0 will just normalize
2105 * the timestamp to TSF at beginning of MPDU reception.
2107 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2108 struct ieee80211_rx_status *status,
2109 unsigned int mpdu_len,
2110 unsigned int mpdu_offset)
2112 u64 ts = status->mactime;
2113 struct rate_info ri;
2116 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2119 memset(&ri, 0, sizeof(ri));
2121 /* Fill cfg80211 rate info */
2122 if (status->flag & RX_FLAG_HT) {
2123 ri.mcs = status->rate_idx;
2124 ri.flags |= RATE_INFO_FLAGS_MCS;
2125 if (status->flag & RX_FLAG_40MHZ)
2126 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2127 if (status->flag & RX_FLAG_SHORT_GI)
2128 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2129 } else if (status->flag & RX_FLAG_VHT) {
2130 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2131 ri.mcs = status->rate_idx;
2132 ri.nss = status->vht_nss;
2133 if (status->flag & RX_FLAG_40MHZ)
2134 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2135 if (status->flag & RX_FLAG_80MHZ)
2136 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2137 if (status->flag & RX_FLAG_80P80MHZ)
2138 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2139 if (status->flag & RX_FLAG_160MHZ)
2140 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2141 if (status->flag & RX_FLAG_SHORT_GI)
2142 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2144 struct ieee80211_supported_band *sband;
2146 sband = local->hw.wiphy->bands[status->band];
2147 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2150 rate = cfg80211_calculate_bitrate(&ri);
2152 /* rewind from end of MPDU */
2153 if (status->flag & RX_FLAG_MACTIME_END)
2154 ts -= mpdu_len * 8 * 10 / rate;
2156 ts += mpdu_offset * 8 * 10 / rate;
2161 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2163 struct ieee80211_sub_if_data *sdata;
2165 mutex_lock(&local->iflist_mtx);
2166 list_for_each_entry(sdata, &local->interfaces, list) {
2167 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2169 if (sdata->wdev.cac_started) {
2170 ieee80211_vif_release_channel(sdata);
2171 cfg80211_cac_event(sdata->dev,
2172 NL80211_RADAR_CAC_ABORTED,
2176 mutex_unlock(&local->iflist_mtx);
2179 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2181 struct ieee80211_local *local =
2182 container_of(work, struct ieee80211_local, radar_detected_work);
2183 struct cfg80211_chan_def chandef;
2185 ieee80211_dfs_cac_cancel(local);
2187 if (local->use_chanctx)
2188 /* currently not handled */
2191 chandef = local->hw.conf.chandef;
2192 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2196 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2198 struct ieee80211_local *local = hw_to_local(hw);
2200 trace_api_radar_detected(local);
2202 ieee80211_queue_work(hw, &local->radar_detected_work);
2204 EXPORT_SYMBOL(ieee80211_radar_detected);