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 enum queue_stop_reason reason)
458 struct ieee80211_local *local = hw_to_local(hw);
462 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
464 for (i = 0; i < hw->queues; i++)
465 __ieee80211_stop_queue(hw, i, reason);
467 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
470 void ieee80211_stop_queues(struct ieee80211_hw *hw)
472 ieee80211_stop_queues_by_reason(hw,
473 IEEE80211_QUEUE_STOP_REASON_DRIVER);
475 EXPORT_SYMBOL(ieee80211_stop_queues);
477 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
479 struct ieee80211_local *local = hw_to_local(hw);
483 if (WARN_ON(queue >= hw->queues))
486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 ret = !!local->queue_stop_reasons[queue];
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
491 EXPORT_SYMBOL(ieee80211_queue_stopped);
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 enum queue_stop_reason reason)
496 struct ieee80211_local *local = hw_to_local(hw);
500 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
502 for (i = 0; i < hw->queues; i++)
503 __ieee80211_wake_queue(hw, i, reason);
505 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
508 void ieee80211_wake_queues(struct ieee80211_hw *hw)
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
512 EXPORT_SYMBOL(ieee80211_wake_queues);
514 void ieee80211_iterate_active_interfaces(
515 struct ieee80211_hw *hw, u32 iter_flags,
516 void (*iterator)(void *data, u8 *mac,
517 struct ieee80211_vif *vif),
520 struct ieee80211_local *local = hw_to_local(hw);
521 struct ieee80211_sub_if_data *sdata;
523 mutex_lock(&local->iflist_mtx);
525 list_for_each_entry(sdata, &local->interfaces, list) {
526 switch (sdata->vif.type) {
527 case NL80211_IFTYPE_MONITOR:
528 case NL80211_IFTYPE_AP_VLAN:
533 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
534 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
536 if (ieee80211_sdata_running(sdata))
537 iterator(data, sdata->vif.addr,
541 sdata = rcu_dereference_protected(local->monitor_sdata,
542 lockdep_is_held(&local->iflist_mtx));
544 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
545 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
546 iterator(data, sdata->vif.addr, &sdata->vif);
548 mutex_unlock(&local->iflist_mtx);
550 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
552 void ieee80211_iterate_active_interfaces_atomic(
553 struct ieee80211_hw *hw, u32 iter_flags,
554 void (*iterator)(void *data, u8 *mac,
555 struct ieee80211_vif *vif),
558 struct ieee80211_local *local = hw_to_local(hw);
559 struct ieee80211_sub_if_data *sdata;
563 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
564 switch (sdata->vif.type) {
565 case NL80211_IFTYPE_MONITOR:
566 case NL80211_IFTYPE_AP_VLAN:
571 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
572 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
574 if (ieee80211_sdata_running(sdata))
575 iterator(data, sdata->vif.addr,
579 sdata = rcu_dereference(local->monitor_sdata);
581 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
582 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
583 iterator(data, sdata->vif.addr, &sdata->vif);
587 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
590 * Nothing should have been stuffed into the workqueue during
591 * the suspend->resume cycle. If this WARN is seen then there
592 * is a bug with either the driver suspend or something in
593 * mac80211 stuffing into the workqueue which we haven't yet
594 * cleared during mac80211's suspend cycle.
596 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
598 if (WARN(local->suspended && !local->resuming,
599 "queueing ieee80211 work while going to suspend\n"))
605 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
607 struct ieee80211_local *local = hw_to_local(hw);
609 if (!ieee80211_can_queue_work(local))
612 queue_work(local->workqueue, work);
614 EXPORT_SYMBOL(ieee80211_queue_work);
616 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
617 struct delayed_work *dwork,
620 struct ieee80211_local *local = hw_to_local(hw);
622 if (!ieee80211_can_queue_work(local))
625 queue_delayed_work(local->workqueue, dwork, delay);
627 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
629 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
630 struct ieee802_11_elems *elems,
635 bool calc_crc = filter != 0;
636 DECLARE_BITMAP(seen_elems, 256);
638 bitmap_zero(seen_elems, 256);
639 memset(elems, 0, sizeof(*elems));
640 elems->ie_start = start;
641 elems->total_len = len;
645 bool elem_parse_failed;
652 elems->parse_error = true;
658 case WLAN_EID_SUPP_RATES:
659 case WLAN_EID_FH_PARAMS:
660 case WLAN_EID_DS_PARAMS:
661 case WLAN_EID_CF_PARAMS:
663 case WLAN_EID_IBSS_PARAMS:
664 case WLAN_EID_CHALLENGE:
666 case WLAN_EID_ERP_INFO:
667 case WLAN_EID_EXT_SUPP_RATES:
668 case WLAN_EID_HT_CAPABILITY:
669 case WLAN_EID_HT_OPERATION:
670 case WLAN_EID_VHT_CAPABILITY:
671 case WLAN_EID_VHT_OPERATION:
672 case WLAN_EID_MESH_ID:
673 case WLAN_EID_MESH_CONFIG:
674 case WLAN_EID_PEER_MGMT:
679 case WLAN_EID_CHANNEL_SWITCH:
680 case WLAN_EID_EXT_CHANSWITCH_ANN:
681 case WLAN_EID_COUNTRY:
682 case WLAN_EID_PWR_CONSTRAINT:
683 case WLAN_EID_TIMEOUT_INTERVAL:
684 if (test_bit(id, seen_elems)) {
685 elems->parse_error = true;
693 if (calc_crc && id < 64 && (filter & (1ULL << id)))
694 crc = crc32_be(crc, pos - 2, elen + 2);
696 elem_parse_failed = false;
701 elems->ssid_len = elen;
703 case WLAN_EID_SUPP_RATES:
704 elems->supp_rates = pos;
705 elems->supp_rates_len = elen;
707 case WLAN_EID_FH_PARAMS:
708 elems->fh_params = pos;
709 elems->fh_params_len = elen;
711 case WLAN_EID_DS_PARAMS:
712 elems->ds_params = pos;
713 elems->ds_params_len = elen;
715 case WLAN_EID_CF_PARAMS:
716 elems->cf_params = pos;
717 elems->cf_params_len = elen;
720 if (elen >= sizeof(struct ieee80211_tim_ie)) {
721 elems->tim = (void *)pos;
722 elems->tim_len = elen;
724 elem_parse_failed = true;
726 case WLAN_EID_IBSS_PARAMS:
727 elems->ibss_params = pos;
728 elems->ibss_params_len = elen;
730 case WLAN_EID_CHALLENGE:
731 elems->challenge = pos;
732 elems->challenge_len = elen;
734 case WLAN_EID_VENDOR_SPECIFIC:
735 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
737 /* Microsoft OUI (00:50:F2) */
740 crc = crc32_be(crc, pos - 2, elen + 2);
743 /* OUI Type 1 - WPA IE */
745 elems->wpa_len = elen;
746 } else if (elen >= 5 && pos[3] == 2) {
747 /* OUI Type 2 - WMM IE */
749 elems->wmm_info = pos;
750 elems->wmm_info_len = elen;
751 } else if (pos[4] == 1) {
752 elems->wmm_param = pos;
753 elems->wmm_param_len = elen;
760 elems->rsn_len = elen;
762 case WLAN_EID_ERP_INFO:
763 elems->erp_info = pos;
764 elems->erp_info_len = elen;
766 case WLAN_EID_EXT_SUPP_RATES:
767 elems->ext_supp_rates = pos;
768 elems->ext_supp_rates_len = elen;
770 case WLAN_EID_HT_CAPABILITY:
771 if (elen >= sizeof(struct ieee80211_ht_cap))
772 elems->ht_cap_elem = (void *)pos;
774 elem_parse_failed = true;
776 case WLAN_EID_HT_OPERATION:
777 if (elen >= sizeof(struct ieee80211_ht_operation))
778 elems->ht_operation = (void *)pos;
780 elem_parse_failed = true;
782 case WLAN_EID_VHT_CAPABILITY:
783 if (elen >= sizeof(struct ieee80211_vht_cap))
784 elems->vht_cap_elem = (void *)pos;
786 elem_parse_failed = true;
788 case WLAN_EID_VHT_OPERATION:
789 if (elen >= sizeof(struct ieee80211_vht_operation))
790 elems->vht_operation = (void *)pos;
792 elem_parse_failed = true;
794 case WLAN_EID_MESH_ID:
795 elems->mesh_id = pos;
796 elems->mesh_id_len = elen;
798 case WLAN_EID_MESH_CONFIG:
799 if (elen >= sizeof(struct ieee80211_meshconf_ie))
800 elems->mesh_config = (void *)pos;
802 elem_parse_failed = true;
804 case WLAN_EID_PEER_MGMT:
805 elems->peering = pos;
806 elems->peering_len = elen;
810 elems->preq_len = elen;
814 elems->prep_len = elen;
818 elems->perr_len = elen;
821 if (elen >= sizeof(struct ieee80211_rann_ie))
822 elems->rann = (void *)pos;
824 elem_parse_failed = true;
826 case WLAN_EID_CHANNEL_SWITCH:
827 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
828 elem_parse_failed = true;
831 elems->ch_switch_ie = (void *)pos;
834 if (!elems->quiet_elem) {
835 elems->quiet_elem = pos;
836 elems->quiet_elem_len = elen;
838 elems->num_of_quiet_elem++;
840 case WLAN_EID_COUNTRY:
841 elems->country_elem = pos;
842 elems->country_elem_len = elen;
844 case WLAN_EID_PWR_CONSTRAINT:
846 elem_parse_failed = true;
849 elems->pwr_constr_elem = pos;
851 case WLAN_EID_TIMEOUT_INTERVAL:
852 elems->timeout_int = pos;
853 elems->timeout_int_len = elen;
859 if (elem_parse_failed)
860 elems->parse_error = true;
862 __set_bit(id, seen_elems);
869 elems->parse_error = true;
874 void ieee802_11_parse_elems(u8 *start, size_t len,
875 struct ieee802_11_elems *elems)
877 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
880 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
883 struct ieee80211_local *local = sdata->local;
884 struct ieee80211_tx_queue_params qparam;
885 struct ieee80211_chanctx_conf *chanctx_conf;
887 bool use_11b, enable_qos;
890 if (!local->ops->conf_tx)
893 if (local->hw.queues < IEEE80211_NUM_ACS)
896 memset(&qparam, 0, sizeof(qparam));
899 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
900 use_11b = (chanctx_conf &&
901 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
902 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
906 * By default disable QoS in STA mode for old access points, which do
907 * not support 802.11e. New APs will provide proper queue parameters,
908 * that we will configure later.
910 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
912 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
913 /* Set defaults according to 802.11-2007 Table 7-37 */
922 case IEEE80211_AC_BK:
923 qparam.cw_max = aCWmax;
924 qparam.cw_min = aCWmin;
928 /* never happens but let's not leave undefined */
930 case IEEE80211_AC_BE:
931 qparam.cw_max = aCWmax;
932 qparam.cw_min = aCWmin;
936 case IEEE80211_AC_VI:
937 qparam.cw_max = aCWmin;
938 qparam.cw_min = (aCWmin + 1) / 2 - 1;
940 qparam.txop = 6016/32;
942 qparam.txop = 3008/32;
945 case IEEE80211_AC_VO:
946 qparam.cw_max = (aCWmin + 1) / 2 - 1;
947 qparam.cw_min = (aCWmin + 1) / 4 - 1;
949 qparam.txop = 3264/32;
951 qparam.txop = 1504/32;
956 /* Confiure old 802.11b/g medium access rules. */
957 qparam.cw_max = aCWmax;
958 qparam.cw_min = aCWmin;
963 qparam.uapsd = false;
965 sdata->tx_conf[ac] = qparam;
966 drv_conf_tx(local, sdata, ac, &qparam);
969 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
970 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
971 sdata->vif.bss_conf.qos = enable_qos;
973 ieee80211_bss_info_change_notify(sdata,
978 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
979 const size_t supp_rates_len,
980 const u8 *supp_rates)
982 struct ieee80211_chanctx_conf *chanctx_conf;
983 int i, have_higher_than_11mbit = 0;
985 /* cf. IEEE 802.11 9.2.12 */
986 for (i = 0; i < supp_rates_len; i++)
987 if ((supp_rates[i] & 0x7f) * 5 > 110)
988 have_higher_than_11mbit = 1;
991 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
994 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
995 have_higher_than_11mbit)
996 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
998 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1001 ieee80211_set_wmm_default(sdata, true);
1004 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1005 enum ieee80211_band band)
1007 struct ieee80211_supported_band *sband;
1008 struct ieee80211_rate *bitrates;
1009 u32 mandatory_rates;
1010 enum ieee80211_rate_flags mandatory_flag;
1013 sband = local->hw.wiphy->bands[band];
1014 if (WARN_ON(!sband))
1017 if (band == IEEE80211_BAND_2GHZ)
1018 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1020 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1022 bitrates = sband->bitrates;
1023 mandatory_rates = 0;
1024 for (i = 0; i < sband->n_bitrates; i++)
1025 if (bitrates[i].flags & mandatory_flag)
1026 mandatory_rates |= BIT(i);
1027 return mandatory_rates;
1030 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1031 u16 transaction, u16 auth_alg, u16 status,
1032 u8 *extra, size_t extra_len, const u8 *da,
1033 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
1035 struct ieee80211_local *local = sdata->local;
1036 struct sk_buff *skb;
1037 struct ieee80211_mgmt *mgmt;
1040 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1041 sizeof(*mgmt) + 6 + extra_len);
1045 skb_reserve(skb, local->hw.extra_tx_headroom);
1047 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1048 memset(mgmt, 0, 24 + 6);
1049 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1050 IEEE80211_STYPE_AUTH);
1051 memcpy(mgmt->da, da, ETH_ALEN);
1052 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1053 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1054 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1055 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1056 mgmt->u.auth.status_code = cpu_to_le16(status);
1058 memcpy(skb_put(skb, extra_len), extra, extra_len);
1060 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1061 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1062 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1066 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1067 ieee80211_tx_skb(sdata, skb);
1070 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1071 const u8 *bssid, u16 stype, u16 reason,
1072 bool send_frame, u8 *frame_buf)
1074 struct ieee80211_local *local = sdata->local;
1075 struct sk_buff *skb;
1076 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1079 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1080 mgmt->duration = 0; /* initialize only */
1081 mgmt->seq_ctrl = 0; /* initialize only */
1082 memcpy(mgmt->da, bssid, ETH_ALEN);
1083 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1084 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1085 /* u.deauth.reason_code == u.disassoc.reason_code */
1086 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1089 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1090 IEEE80211_DEAUTH_FRAME_LEN);
1094 skb_reserve(skb, local->hw.extra_tx_headroom);
1097 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1098 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1100 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1101 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1102 IEEE80211_SKB_CB(skb)->flags |=
1103 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1105 ieee80211_tx_skb(sdata, skb);
1109 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1110 size_t buffer_len, const u8 *ie, size_t ie_len,
1111 enum ieee80211_band band, u32 rate_mask,
1114 struct ieee80211_supported_band *sband;
1115 u8 *pos = buffer, *end = buffer + buffer_len;
1116 size_t offset = 0, noffset;
1117 int supp_rates_len, i;
1122 sband = local->hw.wiphy->bands[band];
1123 if (WARN_ON_ONCE(!sband))
1127 for (i = 0; i < sband->n_bitrates; i++) {
1128 if ((BIT(i) & rate_mask) == 0)
1129 continue; /* skip rate */
1130 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1133 supp_rates_len = min_t(int, num_rates, 8);
1135 if (end - pos < 2 + supp_rates_len)
1137 *pos++ = WLAN_EID_SUPP_RATES;
1138 *pos++ = supp_rates_len;
1139 memcpy(pos, rates, supp_rates_len);
1140 pos += supp_rates_len;
1142 /* insert "request information" if in custom IEs */
1144 static const u8 before_extrates[] = {
1146 WLAN_EID_SUPP_RATES,
1149 noffset = ieee80211_ie_split(ie, ie_len,
1151 ARRAY_SIZE(before_extrates),
1153 if (end - pos < noffset - offset)
1155 memcpy(pos, ie + offset, noffset - offset);
1156 pos += noffset - offset;
1160 ext_rates_len = num_rates - supp_rates_len;
1161 if (ext_rates_len > 0) {
1162 if (end - pos < 2 + ext_rates_len)
1164 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1165 *pos++ = ext_rates_len;
1166 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1167 pos += ext_rates_len;
1170 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1173 *pos++ = WLAN_EID_DS_PARAMS;
1178 /* insert custom IEs that go before HT */
1180 static const u8 before_ht[] = {
1182 WLAN_EID_SUPP_RATES,
1184 WLAN_EID_EXT_SUPP_RATES,
1186 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1188 noffset = ieee80211_ie_split(ie, ie_len,
1189 before_ht, ARRAY_SIZE(before_ht),
1191 if (end - pos < noffset - offset)
1193 memcpy(pos, ie + offset, noffset - offset);
1194 pos += noffset - offset;
1198 if (sband->ht_cap.ht_supported) {
1199 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1201 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1206 * If adding more here, adjust code in main.c
1207 * that calculates local->scan_ies_len.
1210 /* add any remaining custom IEs */
1213 if (end - pos < noffset - offset)
1215 memcpy(pos, ie + offset, noffset - offset);
1216 pos += noffset - offset;
1219 if (sband->vht_cap.vht_supported) {
1220 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1222 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1223 sband->vht_cap.cap);
1226 return pos - buffer;
1228 WARN_ONCE(1, "not enough space for preq IEs\n");
1229 return pos - buffer;
1232 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1233 u8 *dst, u32 ratemask,
1234 struct ieee80211_channel *chan,
1235 const u8 *ssid, size_t ssid_len,
1236 const u8 *ie, size_t ie_len,
1239 struct ieee80211_local *local = sdata->local;
1240 struct sk_buff *skb;
1241 struct ieee80211_mgmt *mgmt;
1246 * Do not send DS Channel parameter for directed probe requests
1247 * in order to maximize the chance that we get a response. Some
1248 * badly-behaved APs don't respond when this parameter is included.
1253 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
1255 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1256 ssid, ssid_len, 100 + ie_len);
1260 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1262 ie, ie_len, chan->band,
1264 skb_put(skb, ies_len);
1267 mgmt = (struct ieee80211_mgmt *) skb->data;
1268 memcpy(mgmt->da, dst, ETH_ALEN);
1269 memcpy(mgmt->bssid, dst, ETH_ALEN);
1272 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1277 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1278 const u8 *ssid, size_t ssid_len,
1279 const u8 *ie, size_t ie_len,
1280 u32 ratemask, bool directed, bool no_cck,
1281 struct ieee80211_channel *channel, bool scan)
1283 struct sk_buff *skb;
1285 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1287 ie, ie_len, directed);
1290 IEEE80211_SKB_CB(skb)->flags |=
1291 IEEE80211_TX_CTL_NO_CCK_RATE;
1293 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1295 ieee80211_tx_skb(sdata, skb);
1299 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1300 struct ieee802_11_elems *elems,
1301 enum ieee80211_band band, u32 *basic_rates)
1303 struct ieee80211_supported_band *sband;
1304 struct ieee80211_rate *bitrates;
1308 sband = local->hw.wiphy->bands[band];
1310 if (WARN_ON(!sband))
1313 bitrates = sband->bitrates;
1314 num_rates = sband->n_bitrates;
1316 for (i = 0; i < elems->supp_rates_len +
1317 elems->ext_supp_rates_len; i++) {
1321 if (i < elems->supp_rates_len)
1322 rate = elems->supp_rates[i];
1323 else if (elems->ext_supp_rates)
1324 rate = elems->ext_supp_rates
1325 [i - elems->supp_rates_len];
1326 own_rate = 5 * (rate & 0x7f);
1327 is_basic = !!(rate & 0x80);
1329 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1332 for (j = 0; j < num_rates; j++) {
1333 if (bitrates[j].bitrate == own_rate) {
1334 supp_rates |= BIT(j);
1335 if (basic_rates && is_basic)
1336 *basic_rates |= BIT(j);
1343 void ieee80211_stop_device(struct ieee80211_local *local)
1345 ieee80211_led_radio(local, false);
1346 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1348 cancel_work_sync(&local->reconfig_filter);
1350 flush_workqueue(local->workqueue);
1354 int ieee80211_reconfig(struct ieee80211_local *local)
1356 struct ieee80211_hw *hw = &local->hw;
1357 struct ieee80211_sub_if_data *sdata;
1358 struct ieee80211_chanctx *ctx;
1359 struct sta_info *sta;
1361 bool reconfig_due_to_wowlan = false;
1364 if (local->suspended)
1365 local->resuming = true;
1367 if (local->wowlan) {
1368 local->wowlan = false;
1369 res = drv_resume(local);
1371 local->resuming = false;
1378 * res is 1, which means the driver requested
1379 * to go through a regular reset on wakeup.
1381 reconfig_due_to_wowlan = true;
1384 /* everything else happens only if HW was up & running */
1385 if (!local->open_count)
1389 * Upon resume hardware can sometimes be goofy due to
1390 * various platform / driver / bus issues, so restarting
1391 * the device may at times not work immediately. Propagate
1394 res = drv_start(local);
1396 WARN(local->suspended, "Hardware became unavailable "
1397 "upon resume. This could be a software issue "
1398 "prior to suspend or a hardware issue.\n");
1402 /* setup fragmentation threshold */
1403 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1405 /* setup RTS threshold */
1406 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1408 /* reset coverage class */
1409 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1411 ieee80211_led_radio(local, true);
1412 ieee80211_mod_tpt_led_trig(local,
1413 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1415 /* add interfaces */
1416 sdata = rtnl_dereference(local->monitor_sdata);
1418 res = drv_add_interface(local, sdata);
1420 rcu_assign_pointer(local->monitor_sdata, NULL);
1426 list_for_each_entry(sdata, &local->interfaces, list) {
1427 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1428 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1429 ieee80211_sdata_running(sdata))
1430 res = drv_add_interface(local, sdata);
1433 /* add channel contexts */
1434 if (local->use_chanctx) {
1435 mutex_lock(&local->chanctx_mtx);
1436 list_for_each_entry(ctx, &local->chanctx_list, list)
1437 WARN_ON(drv_add_chanctx(local, ctx));
1438 mutex_unlock(&local->chanctx_mtx);
1441 list_for_each_entry(sdata, &local->interfaces, list) {
1442 struct ieee80211_chanctx_conf *ctx_conf;
1444 if (!ieee80211_sdata_running(sdata))
1447 mutex_lock(&local->chanctx_mtx);
1448 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1449 lockdep_is_held(&local->chanctx_mtx));
1451 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1453 drv_assign_vif_chanctx(local, sdata, ctx);
1455 mutex_unlock(&local->chanctx_mtx);
1458 sdata = rtnl_dereference(local->monitor_sdata);
1459 if (sdata && local->use_chanctx && ieee80211_sdata_running(sdata)) {
1460 struct ieee80211_chanctx_conf *ctx_conf;
1462 mutex_lock(&local->chanctx_mtx);
1463 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1464 lockdep_is_held(&local->chanctx_mtx));
1466 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1468 drv_assign_vif_chanctx(local, sdata, ctx);
1470 mutex_unlock(&local->chanctx_mtx);
1474 mutex_lock(&local->sta_mtx);
1475 list_for_each_entry(sta, &local->sta_list, list) {
1476 enum ieee80211_sta_state state;
1481 /* AP-mode stations will be added later */
1482 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1485 for (state = IEEE80211_STA_NOTEXIST;
1486 state < sta->sta_state; state++)
1487 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1490 mutex_unlock(&local->sta_mtx);
1492 /* reconfigure tx conf */
1493 if (hw->queues >= IEEE80211_NUM_ACS) {
1494 list_for_each_entry(sdata, &local->interfaces, list) {
1495 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1496 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1497 !ieee80211_sdata_running(sdata))
1500 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1501 drv_conf_tx(local, sdata, i,
1502 &sdata->tx_conf[i]);
1506 /* reconfigure hardware */
1507 ieee80211_hw_config(local, ~0);
1509 ieee80211_configure_filter(local);
1511 /* Finally also reconfigure all the BSS information */
1512 list_for_each_entry(sdata, &local->interfaces, list) {
1515 if (!ieee80211_sdata_running(sdata))
1518 /* common change flags for all interface types */
1519 changed = BSS_CHANGED_ERP_CTS_PROT |
1520 BSS_CHANGED_ERP_PREAMBLE |
1521 BSS_CHANGED_ERP_SLOT |
1523 BSS_CHANGED_BASIC_RATES |
1524 BSS_CHANGED_BEACON_INT |
1529 BSS_CHANGED_TXPOWER;
1532 if (local->resuming && !reconfig_due_to_wowlan)
1533 sdata->vif.bss_conf = sdata->suspend_bss_conf;
1536 switch (sdata->vif.type) {
1537 case NL80211_IFTYPE_STATION:
1538 changed |= BSS_CHANGED_ASSOC |
1539 BSS_CHANGED_ARP_FILTER |
1541 mutex_lock(&sdata->u.mgd.mtx);
1542 ieee80211_bss_info_change_notify(sdata, changed);
1543 mutex_unlock(&sdata->u.mgd.mtx);
1545 case NL80211_IFTYPE_ADHOC:
1546 changed |= BSS_CHANGED_IBSS;
1548 case NL80211_IFTYPE_AP:
1549 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1551 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1552 changed |= BSS_CHANGED_AP_PROBE_RESP;
1554 if (rcu_access_pointer(sdata->u.ap.beacon))
1555 drv_start_ap(local, sdata);
1559 case NL80211_IFTYPE_MESH_POINT:
1560 if (sdata->vif.bss_conf.enable_beacon) {
1561 changed |= BSS_CHANGED_BEACON |
1562 BSS_CHANGED_BEACON_ENABLED;
1563 ieee80211_bss_info_change_notify(sdata, changed);
1566 case NL80211_IFTYPE_WDS:
1568 case NL80211_IFTYPE_AP_VLAN:
1569 case NL80211_IFTYPE_MONITOR:
1570 /* ignore virtual */
1572 case NL80211_IFTYPE_P2P_DEVICE:
1573 changed = BSS_CHANGED_IDLE;
1575 case NL80211_IFTYPE_UNSPECIFIED:
1576 case NUM_NL80211_IFTYPES:
1577 case NL80211_IFTYPE_P2P_CLIENT:
1578 case NL80211_IFTYPE_P2P_GO:
1584 ieee80211_recalc_ps(local, -1);
1587 * The sta might be in psm against the ap (e.g. because
1588 * this was the state before a hw restart), so we
1589 * explicitly send a null packet in order to make sure
1590 * it'll sync against the ap (and get out of psm).
1592 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1593 list_for_each_entry(sdata, &local->interfaces, list) {
1594 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1596 if (!sdata->u.mgd.associated)
1599 ieee80211_send_nullfunc(local, sdata, 0);
1603 /* APs are now beaconing, add back stations */
1604 mutex_lock(&local->sta_mtx);
1605 list_for_each_entry(sta, &local->sta_list, list) {
1606 enum ieee80211_sta_state state;
1611 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1614 for (state = IEEE80211_STA_NOTEXIST;
1615 state < sta->sta_state; state++)
1616 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1619 mutex_unlock(&local->sta_mtx);
1622 list_for_each_entry(sdata, &local->interfaces, list)
1623 if (ieee80211_sdata_running(sdata))
1624 ieee80211_enable_keys(sdata);
1627 local->in_reconfig = false;
1631 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1632 * sessions can be established after a resume.
1634 * Also tear down aggregation sessions since reconfiguring
1635 * them in a hardware restart scenario is not easily done
1636 * right now, and the hardware will have lost information
1637 * about the sessions, but we and the AP still think they
1638 * are active. This is really a workaround though.
1640 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1641 mutex_lock(&local->sta_mtx);
1643 list_for_each_entry(sta, &local->sta_list, list) {
1644 ieee80211_sta_tear_down_BA_sessions(
1645 sta, AGG_STOP_LOCAL_REQUEST);
1646 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1649 mutex_unlock(&local->sta_mtx);
1652 ieee80211_wake_queues_by_reason(hw,
1653 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1656 * If this is for hw restart things are still running.
1657 * We may want to change that later, however.
1659 if (!local->suspended || reconfig_due_to_wowlan)
1660 drv_restart_complete(local);
1662 if (!local->suspended)
1666 /* first set suspended false, then resuming */
1667 local->suspended = false;
1669 local->resuming = false;
1671 list_for_each_entry(sdata, &local->interfaces, list) {
1672 switch(sdata->vif.type) {
1673 case NL80211_IFTYPE_STATION:
1674 ieee80211_sta_restart(sdata);
1676 case NL80211_IFTYPE_ADHOC:
1677 ieee80211_ibss_restart(sdata);
1679 case NL80211_IFTYPE_MESH_POINT:
1680 ieee80211_mesh_restart(sdata);
1687 mod_timer(&local->sta_cleanup, jiffies + 1);
1689 mutex_lock(&local->sta_mtx);
1690 list_for_each_entry(sta, &local->sta_list, list)
1691 mesh_plink_restart(sta);
1692 mutex_unlock(&local->sta_mtx);
1699 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1701 struct ieee80211_sub_if_data *sdata;
1702 struct ieee80211_local *local;
1703 struct ieee80211_key *key;
1708 sdata = vif_to_sdata(vif);
1709 local = sdata->local;
1711 if (WARN_ON(!local->resuming))
1714 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1717 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1719 mutex_lock(&local->key_mtx);
1720 list_for_each_entry(key, &sdata->key_list, list)
1721 key->flags |= KEY_FLAG_TAINTED;
1722 mutex_unlock(&local->key_mtx);
1724 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1726 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1728 struct ieee80211_local *local = sdata->local;
1729 struct ieee80211_chanctx_conf *chanctx_conf;
1730 struct ieee80211_chanctx *chanctx;
1732 mutex_lock(&local->chanctx_mtx);
1734 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1735 lockdep_is_held(&local->chanctx_mtx));
1737 if (WARN_ON_ONCE(!chanctx_conf))
1740 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1741 ieee80211_recalc_smps_chanctx(local, chanctx);
1743 mutex_unlock(&local->chanctx_mtx);
1746 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1750 for (i = 0; i < n_ids; i++)
1757 * ieee80211_ie_split - split an IE buffer according to ordering
1759 * @ies: the IE buffer
1760 * @ielen: the length of the IE buffer
1761 * @ids: an array with element IDs that are allowed before
1763 * @n_ids: the size of the element ID array
1764 * @offset: offset where to start splitting in the buffer
1766 * This function splits an IE buffer by updating the @offset
1767 * variable to point to the location where the buffer should be
1770 * It assumes that the given IE buffer is well-formed, this
1771 * has to be guaranteed by the caller!
1773 * It also assumes that the IEs in the buffer are ordered
1774 * correctly, if not the result of using this function will not
1775 * be ordered correctly either, i.e. it does no reordering.
1777 * The function returns the offset where the next part of the
1778 * buffer starts, which may be @ielen if the entire (remainder)
1779 * of the buffer should be used.
1781 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1782 const u8 *ids, int n_ids, size_t offset)
1784 size_t pos = offset;
1786 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1787 pos += 2 + ies[pos + 1];
1792 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1794 size_t pos = offset;
1796 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1797 pos += 2 + ies[pos + 1];
1802 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1806 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1808 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1812 * Scale up threshold values before storing it, as the RSSI averaging
1813 * algorithm uses a scaled up value as well. Change this scaling
1814 * factor if the RSSI averaging algorithm changes.
1816 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1817 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1820 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1824 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1826 WARN_ON(rssi_min_thold == rssi_max_thold ||
1827 rssi_min_thold > rssi_max_thold);
1829 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1832 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1834 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1836 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1838 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1840 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
1842 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1847 *pos++ = WLAN_EID_HT_CAPABILITY;
1848 *pos++ = sizeof(struct ieee80211_ht_cap);
1849 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1851 /* capability flags */
1852 tmp = cpu_to_le16(cap);
1853 memcpy(pos, &tmp, sizeof(u16));
1856 /* AMPDU parameters */
1857 *pos++ = ht_cap->ampdu_factor |
1858 (ht_cap->ampdu_density <<
1859 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1862 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1863 pos += sizeof(ht_cap->mcs);
1865 /* extended capabilities */
1866 pos += sizeof(__le16);
1868 /* BF capabilities */
1869 pos += sizeof(__le32);
1871 /* antenna selection */
1877 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1882 *pos++ = WLAN_EID_VHT_CAPABILITY;
1883 *pos++ = sizeof(struct ieee80211_vht_cap);
1884 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
1886 /* capability flags */
1887 tmp = cpu_to_le32(cap);
1888 memcpy(pos, &tmp, sizeof(u32));
1892 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1893 pos += sizeof(vht_cap->vht_mcs);
1898 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1899 const struct cfg80211_chan_def *chandef,
1902 struct ieee80211_ht_operation *ht_oper;
1903 /* Build HT Information */
1904 *pos++ = WLAN_EID_HT_OPERATION;
1905 *pos++ = sizeof(struct ieee80211_ht_operation);
1906 ht_oper = (struct ieee80211_ht_operation *)pos;
1907 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1908 chandef->chan->center_freq);
1909 switch (chandef->width) {
1910 case NL80211_CHAN_WIDTH_160:
1911 case NL80211_CHAN_WIDTH_80P80:
1912 case NL80211_CHAN_WIDTH_80:
1913 case NL80211_CHAN_WIDTH_40:
1914 if (chandef->center_freq1 > chandef->chan->center_freq)
1915 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1917 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1920 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1923 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1924 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1925 chandef->width != NL80211_CHAN_WIDTH_20)
1926 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
1928 ht_oper->operation_mode = cpu_to_le16(prot_mode);
1929 ht_oper->stbc_param = 0x0000;
1931 /* It seems that Basic MCS set and Supported MCS set
1932 are identical for the first 10 bytes */
1933 memset(&ht_oper->basic_set, 0, 16);
1934 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
1936 return pos + sizeof(struct ieee80211_ht_operation);
1939 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1940 struct ieee80211_ht_operation *ht_oper,
1941 struct cfg80211_chan_def *chandef)
1943 enum nl80211_channel_type channel_type;
1946 cfg80211_chandef_create(chandef, control_chan,
1947 NL80211_CHAN_NO_HT);
1951 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1952 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1953 channel_type = NL80211_CHAN_HT20;
1955 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1956 channel_type = NL80211_CHAN_HT40PLUS;
1958 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1959 channel_type = NL80211_CHAN_HT40MINUS;
1962 channel_type = NL80211_CHAN_NO_HT;
1965 cfg80211_chandef_create(chandef, control_chan, channel_type);
1968 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1969 struct sk_buff *skb, bool need_basic,
1970 enum ieee80211_band band)
1972 struct ieee80211_local *local = sdata->local;
1973 struct ieee80211_supported_band *sband;
1976 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
1978 sband = local->hw.wiphy->bands[band];
1979 rates = sband->n_bitrates;
1983 if (skb_tailroom(skb) < rates + 2)
1986 pos = skb_put(skb, rates + 2);
1987 *pos++ = WLAN_EID_SUPP_RATES;
1989 for (i = 0; i < rates; i++) {
1991 if (need_basic && basic_rates & BIT(i))
1993 rate = sband->bitrates[i].bitrate;
1994 *pos++ = basic | (u8) (rate / 5);
2000 int ieee80211_add_ext_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;
2007 u8 i, exrates, *pos;
2008 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2010 sband = local->hw.wiphy->bands[band];
2011 exrates = sband->n_bitrates;
2017 if (skb_tailroom(skb) < exrates + 2)
2021 pos = skb_put(skb, exrates + 2);
2022 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2024 for (i = 8; i < sband->n_bitrates; i++) {
2026 if (need_basic && basic_rates & BIT(i))
2028 rate = sband->bitrates[i].bitrate;
2029 *pos++ = basic | (u8) (rate / 5);
2035 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2037 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2040 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2041 /* non-managed type inferfaces */
2044 return ifmgd->ave_beacon_signal;
2046 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2048 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2053 /* TODO: consider rx_highest */
2055 if (mcs->rx_mask[3])
2057 if (mcs->rx_mask[2])
2059 if (mcs->rx_mask[1])
2065 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2066 * @local: mac80211 hw info struct
2067 * @status: RX status
2068 * @mpdu_len: total MPDU length (including FCS)
2069 * @mpdu_offset: offset into MPDU to calculate timestamp at
2071 * This function calculates the RX timestamp at the given MPDU offset, taking
2072 * into account what the RX timestamp was. An offset of 0 will just normalize
2073 * the timestamp to TSF at beginning of MPDU reception.
2075 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2076 struct ieee80211_rx_status *status,
2077 unsigned int mpdu_len,
2078 unsigned int mpdu_offset)
2080 u64 ts = status->mactime;
2081 struct rate_info ri;
2084 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2087 memset(&ri, 0, sizeof(ri));
2089 /* Fill cfg80211 rate info */
2090 if (status->flag & RX_FLAG_HT) {
2091 ri.mcs = status->rate_idx;
2092 ri.flags |= RATE_INFO_FLAGS_MCS;
2093 if (status->flag & RX_FLAG_40MHZ)
2094 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2095 if (status->flag & RX_FLAG_SHORT_GI)
2096 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2097 } else if (status->flag & RX_FLAG_VHT) {
2098 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2099 ri.mcs = status->rate_idx;
2100 ri.nss = status->vht_nss;
2101 if (status->flag & RX_FLAG_40MHZ)
2102 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2103 if (status->flag & RX_FLAG_80MHZ)
2104 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2105 if (status->flag & RX_FLAG_80P80MHZ)
2106 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2107 if (status->flag & RX_FLAG_160MHZ)
2108 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2109 if (status->flag & RX_FLAG_SHORT_GI)
2110 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2112 struct ieee80211_supported_band *sband;
2114 sband = local->hw.wiphy->bands[status->band];
2115 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2118 rate = cfg80211_calculate_bitrate(&ri);
2120 /* rewind from end of MPDU */
2121 if (status->flag & RX_FLAG_MACTIME_END)
2122 ts -= mpdu_len * 8 * 10 / rate;
2124 ts += mpdu_offset * 8 * 10 / rate;