2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * utilities for mac80211
15 #include <net/mac80211.h>
16 #include <linux/netdevice.h>
17 #include <linux/export.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/skbuff.h>
21 #include <linux/etherdevice.h>
22 #include <linux/if_arp.h>
23 #include <linux/bitmap.h>
24 #include <linux/crc32.h>
25 #include <net/net_namespace.h>
26 #include <net/cfg80211.h>
27 #include <net/rtnetlink.h>
29 #include "ieee80211_i.h"
30 #include "driver-ops.h"
37 /* privid for wiphys to determine whether they belong to us or not */
38 const void *const mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
40 struct ieee80211_hw
*wiphy_to_ieee80211_hw(struct wiphy
*wiphy
)
42 struct ieee80211_local
*local
;
45 local
= wiphy_priv(wiphy
);
48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw
);
50 u8
*ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
,
51 enum nl80211_iftype type
)
53 __le16 fc
= hdr
->frame_control
;
55 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
59 if (ieee80211_is_data(fc
)) {
60 if (len
< 24) /* drop incorrect hdr len (data) */
63 if (ieee80211_has_a4(fc
))
65 if (ieee80211_has_tods(fc
))
67 if (ieee80211_has_fromds(fc
))
73 if (ieee80211_is_mgmt(fc
)) {
74 if (len
< 24) /* drop incorrect hdr len (mgmt) */
79 if (ieee80211_is_ctl(fc
)) {
80 if (ieee80211_is_pspoll(fc
))
83 if (ieee80211_is_back_req(fc
)) {
85 case NL80211_IFTYPE_STATION
:
87 case NL80211_IFTYPE_AP
:
88 case NL80211_IFTYPE_AP_VLAN
:
91 break; /* fall through to the return */
99 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
102 struct ieee80211_hdr
*hdr
;
104 skb_queue_walk(&tx
->skbs
, skb
) {
105 hdr
= (struct ieee80211_hdr
*) skb
->data
;
106 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
110 int ieee80211_frame_duration(enum ieee80211_band band
, size_t len
,
111 int rate
, int erp
, int short_preamble
,
116 /* calculate duration (in microseconds, rounded up to next higher
117 * integer if it includes a fractional microsecond) to send frame of
118 * len bytes (does not include FCS) at the given rate. Duration will
121 * rate is in 100 kbps, so divident is multiplied by 10 in the
122 * DIV_ROUND_UP() operations.
124 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
125 * is assumed to be 0 otherwise.
128 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
132 * N_DBPS = DATARATE x 4
133 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
134 * (16 = SIGNAL time, 6 = tail bits)
135 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
138 * 802.11a - 18.5.2: aSIFSTime = 16 usec
139 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
140 * signal ext = 6 usec
142 dur
= 16; /* SIFS + signal ext */
143 dur
+= 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
144 dur
+= 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
146 /* IEEE 802.11-2012 18.3.2.4: all values above are:
147 * * times 4 for 5 MHz
148 * * times 2 for 10 MHz
152 /* rates should already consider the channel bandwidth,
153 * don't apply divisor again.
155 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
156 4 * rate
); /* T_SYM x N_SYM */
159 * 802.11b or 802.11g with 802.11b compatibility:
160 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
161 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
163 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
164 * aSIFSTime = 10 usec
165 * aPreambleLength = 144 usec or 72 usec with short preamble
166 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
168 dur
= 10; /* aSIFSTime = 10 usec */
169 dur
+= short_preamble
? (72 + 24) : (144 + 48);
171 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
177 /* Exported duration function for driver use */
178 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
179 struct ieee80211_vif
*vif
,
180 enum ieee80211_band band
,
182 struct ieee80211_rate
*rate
)
184 struct ieee80211_sub_if_data
*sdata
;
187 bool short_preamble
= false;
191 sdata
= vif_to_sdata(vif
);
192 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
193 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
194 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
195 shift
= ieee80211_vif_get_shift(vif
);
198 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
199 short_preamble
, shift
);
201 return cpu_to_le16(dur
);
203 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
205 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
206 struct ieee80211_vif
*vif
, size_t frame_len
,
207 const struct ieee80211_tx_info
*frame_txctl
)
209 struct ieee80211_local
*local
= hw_to_local(hw
);
210 struct ieee80211_rate
*rate
;
211 struct ieee80211_sub_if_data
*sdata
;
213 int erp
, shift
= 0, bitrate
;
215 struct ieee80211_supported_band
*sband
;
217 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
219 short_preamble
= false;
221 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
225 sdata
= vif_to_sdata(vif
);
226 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
227 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
228 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
229 shift
= ieee80211_vif_get_shift(vif
);
232 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
235 dur
= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
236 erp
, short_preamble
, shift
);
237 /* Data frame duration */
238 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
239 erp
, short_preamble
, shift
);
241 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
242 erp
, short_preamble
, shift
);
244 return cpu_to_le16(dur
);
246 EXPORT_SYMBOL(ieee80211_rts_duration
);
248 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
249 struct ieee80211_vif
*vif
,
251 const struct ieee80211_tx_info
*frame_txctl
)
253 struct ieee80211_local
*local
= hw_to_local(hw
);
254 struct ieee80211_rate
*rate
;
255 struct ieee80211_sub_if_data
*sdata
;
257 int erp
, shift
= 0, bitrate
;
259 struct ieee80211_supported_band
*sband
;
261 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
263 short_preamble
= false;
265 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
268 sdata
= vif_to_sdata(vif
);
269 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
270 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
271 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
272 shift
= ieee80211_vif_get_shift(vif
);
275 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
277 /* Data frame duration */
278 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
279 erp
, short_preamble
, shift
);
280 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
282 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
283 erp
, short_preamble
, shift
);
286 return cpu_to_le16(dur
);
288 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
290 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
292 struct ieee80211_sub_if_data
*sdata
;
293 int n_acs
= IEEE80211_NUM_ACS
;
295 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
298 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
304 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
305 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
308 for (ac
= 0; ac
< n_acs
; ac
++) {
309 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
311 if (ac_queue
== queue
||
312 (sdata
->vif
.cab_queue
== queue
&&
313 local
->queue_stop_reasons
[ac_queue
] == 0 &&
314 skb_queue_empty(&local
->pending
[ac_queue
])))
315 netif_wake_subqueue(sdata
->dev
, ac
);
320 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
321 enum queue_stop_reason reason
,
324 struct ieee80211_local
*local
= hw_to_local(hw
);
326 trace_wake_queue(local
, queue
, reason
);
328 if (WARN_ON(queue
>= hw
->queues
))
331 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
335 local
->q_stop_reasons
[queue
][reason
] = 0;
337 local
->q_stop_reasons
[queue
][reason
]--;
339 if (local
->q_stop_reasons
[queue
][reason
] == 0)
340 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
342 if (local
->queue_stop_reasons
[queue
] != 0)
343 /* someone still has this queue stopped */
346 if (skb_queue_empty(&local
->pending
[queue
])) {
348 ieee80211_propagate_queue_wake(local
, queue
);
351 tasklet_schedule(&local
->tx_pending_tasklet
);
354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
355 enum queue_stop_reason reason
,
358 struct ieee80211_local
*local
= hw_to_local(hw
);
361 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
362 __ieee80211_wake_queue(hw
, queue
, reason
, refcounted
);
363 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
366 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
368 ieee80211_wake_queue_by_reason(hw
, queue
,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
372 EXPORT_SYMBOL(ieee80211_wake_queue
);
374 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
375 enum queue_stop_reason reason
,
378 struct ieee80211_local
*local
= hw_to_local(hw
);
379 struct ieee80211_sub_if_data
*sdata
;
380 int n_acs
= IEEE80211_NUM_ACS
;
382 trace_stop_queue(local
, queue
, reason
);
384 if (WARN_ON(queue
>= hw
->queues
))
388 local
->q_stop_reasons
[queue
][reason
] = 1;
390 local
->q_stop_reasons
[queue
][reason
]++;
392 if (__test_and_set_bit(reason
, &local
->queue_stop_reasons
[queue
]))
395 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
399 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
405 for (ac
= 0; ac
< n_acs
; ac
++) {
406 if (sdata
->vif
.hw_queue
[ac
] == queue
||
407 sdata
->vif
.cab_queue
== queue
)
408 netif_stop_subqueue(sdata
->dev
, ac
);
414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
415 enum queue_stop_reason reason
,
418 struct ieee80211_local
*local
= hw_to_local(hw
);
421 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
422 __ieee80211_stop_queue(hw
, queue
, reason
, refcounted
);
423 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
426 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
428 ieee80211_stop_queue_by_reason(hw
, queue
,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
432 EXPORT_SYMBOL(ieee80211_stop_queue
);
434 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
437 struct ieee80211_hw
*hw
= &local
->hw
;
439 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
440 int queue
= info
->hw_queue
;
442 if (WARN_ON(!info
->control
.vif
)) {
443 ieee80211_free_txskb(&local
->hw
, skb
);
447 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
448 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
450 __skb_queue_tail(&local
->pending
[queue
], skb
);
451 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
453 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
456 void ieee80211_add_pending_skbs(struct ieee80211_local
*local
,
457 struct sk_buff_head
*skbs
)
459 struct ieee80211_hw
*hw
= &local
->hw
;
464 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
465 while ((skb
= skb_dequeue(skbs
))) {
466 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
468 if (WARN_ON(!info
->control
.vif
)) {
469 ieee80211_free_txskb(&local
->hw
, skb
);
473 queue
= info
->hw_queue
;
475 __ieee80211_stop_queue(hw
, queue
,
476 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
479 __skb_queue_tail(&local
->pending
[queue
], skb
);
482 for (i
= 0; i
< hw
->queues
; i
++)
483 __ieee80211_wake_queue(hw
, i
,
484 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
486 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
490 unsigned long queues
,
491 enum queue_stop_reason reason
,
494 struct ieee80211_local
*local
= hw_to_local(hw
);
498 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
500 for_each_set_bit(i
, &queues
, hw
->queues
)
501 __ieee80211_stop_queue(hw
, i
, reason
, refcounted
);
503 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
506 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
508 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
509 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
512 EXPORT_SYMBOL(ieee80211_stop_queues
);
514 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
516 struct ieee80211_local
*local
= hw_to_local(hw
);
520 if (WARN_ON(queue
>= hw
->queues
))
523 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
524 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
525 &local
->queue_stop_reasons
[queue
]);
526 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
529 EXPORT_SYMBOL(ieee80211_queue_stopped
);
531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
532 unsigned long queues
,
533 enum queue_stop_reason reason
,
536 struct ieee80211_local
*local
= hw_to_local(hw
);
540 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
542 for_each_set_bit(i
, &queues
, hw
->queues
)
543 __ieee80211_wake_queue(hw
, i
, reason
, refcounted
);
545 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
548 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
550 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
551 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
554 EXPORT_SYMBOL(ieee80211_wake_queues
);
557 ieee80211_get_vif_queues(struct ieee80211_local
*local
,
558 struct ieee80211_sub_if_data
*sdata
)
562 if (sdata
&& local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
567 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
568 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
569 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
570 queues
|= BIT(sdata
->vif
.cab_queue
);
573 queues
= BIT(local
->hw
.queues
) - 1;
579 void __ieee80211_flush_queues(struct ieee80211_local
*local
,
580 struct ieee80211_sub_if_data
*sdata
,
581 unsigned int queues
, bool drop
)
583 if (!local
->ops
->flush
)
587 * If no queue was set, or if the HW doesn't support
588 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
590 if (!queues
|| !(local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
))
591 queues
= ieee80211_get_vif_queues(local
, sdata
);
593 ieee80211_stop_queues_by_reason(&local
->hw
, queues
,
594 IEEE80211_QUEUE_STOP_REASON_FLUSH
,
597 drv_flush(local
, sdata
, queues
, drop
);
599 ieee80211_wake_queues_by_reason(&local
->hw
, queues
,
600 IEEE80211_QUEUE_STOP_REASON_FLUSH
,
604 void ieee80211_flush_queues(struct ieee80211_local
*local
,
605 struct ieee80211_sub_if_data
*sdata
, bool drop
)
607 __ieee80211_flush_queues(local
, sdata
, 0, drop
);
610 void ieee80211_stop_vif_queues(struct ieee80211_local
*local
,
611 struct ieee80211_sub_if_data
*sdata
,
612 enum queue_stop_reason reason
)
614 ieee80211_stop_queues_by_reason(&local
->hw
,
615 ieee80211_get_vif_queues(local
, sdata
),
619 void ieee80211_wake_vif_queues(struct ieee80211_local
*local
,
620 struct ieee80211_sub_if_data
*sdata
,
621 enum queue_stop_reason reason
)
623 ieee80211_wake_queues_by_reason(&local
->hw
,
624 ieee80211_get_vif_queues(local
, sdata
),
628 static void __iterate_active_interfaces(struct ieee80211_local
*local
,
630 void (*iterator
)(void *data
, u8
*mac
,
631 struct ieee80211_vif
*vif
),
634 struct ieee80211_sub_if_data
*sdata
;
636 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
637 switch (sdata
->vif
.type
) {
638 case NL80211_IFTYPE_MONITOR
:
639 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
642 case NL80211_IFTYPE_AP_VLAN
:
647 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
648 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
650 if (ieee80211_sdata_running(sdata
))
651 iterator(data
, sdata
->vif
.addr
,
655 sdata
= rcu_dereference_check(local
->monitor_sdata
,
656 lockdep_is_held(&local
->iflist_mtx
) ||
657 lockdep_rtnl_is_held());
659 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
660 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
661 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
664 void ieee80211_iterate_active_interfaces(
665 struct ieee80211_hw
*hw
, u32 iter_flags
,
666 void (*iterator
)(void *data
, u8
*mac
,
667 struct ieee80211_vif
*vif
),
670 struct ieee80211_local
*local
= hw_to_local(hw
);
672 mutex_lock(&local
->iflist_mtx
);
673 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
674 mutex_unlock(&local
->iflist_mtx
);
676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
678 void ieee80211_iterate_active_interfaces_atomic(
679 struct ieee80211_hw
*hw
, u32 iter_flags
,
680 void (*iterator
)(void *data
, u8
*mac
,
681 struct ieee80211_vif
*vif
),
684 struct ieee80211_local
*local
= hw_to_local(hw
);
687 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
692 void ieee80211_iterate_active_interfaces_rtnl(
693 struct ieee80211_hw
*hw
, u32 iter_flags
,
694 void (*iterator
)(void *data
, u8
*mac
,
695 struct ieee80211_vif
*vif
),
698 struct ieee80211_local
*local
= hw_to_local(hw
);
702 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl
);
706 static void __iterate_stations(struct ieee80211_local
*local
,
707 void (*iterator
)(void *data
,
708 struct ieee80211_sta
*sta
),
711 struct sta_info
*sta
;
713 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
717 iterator(data
, &sta
->sta
);
721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw
*hw
,
722 void (*iterator
)(void *data
,
723 struct ieee80211_sta
*sta
),
726 struct ieee80211_local
*local
= hw_to_local(hw
);
729 __iterate_stations(local
, iterator
, data
);
732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic
);
734 struct ieee80211_vif
*wdev_to_ieee80211_vif(struct wireless_dev
*wdev
)
736 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
738 if (!ieee80211_sdata_running(sdata
) ||
739 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif
);
746 * Nothing should have been stuffed into the workqueue during
747 * the suspend->resume cycle. Since we can't check each caller
748 * of this function if we are already quiescing / suspended,
749 * check here and don't WARN since this can actually happen when
750 * the rx path (for example) is racing against __ieee80211_suspend
751 * and suspending / quiescing was set after the rx path checked
754 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
756 if (local
->quiescing
|| (local
->suspended
&& !local
->resuming
)) {
757 pr_warn("queueing ieee80211 work while going to suspend\n");
764 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
766 struct ieee80211_local
*local
= hw_to_local(hw
);
768 if (!ieee80211_can_queue_work(local
))
771 queue_work(local
->workqueue
, work
);
773 EXPORT_SYMBOL(ieee80211_queue_work
);
775 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
776 struct delayed_work
*dwork
,
779 struct ieee80211_local
*local
= hw_to_local(hw
);
781 if (!ieee80211_can_queue_work(local
))
784 queue_delayed_work(local
->workqueue
, dwork
, delay
);
786 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
788 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
789 struct ieee802_11_elems
*elems
,
793 const u8
*pos
= start
;
794 bool calc_crc
= filter
!= 0;
795 DECLARE_BITMAP(seen_elems
, 256);
798 bitmap_zero(seen_elems
, 256);
799 memset(elems
, 0, sizeof(*elems
));
800 elems
->ie_start
= start
;
801 elems
->total_len
= len
;
805 bool elem_parse_failed
;
812 elems
->parse_error
= true;
818 case WLAN_EID_SUPP_RATES
:
819 case WLAN_EID_FH_PARAMS
:
820 case WLAN_EID_DS_PARAMS
:
821 case WLAN_EID_CF_PARAMS
:
823 case WLAN_EID_IBSS_PARAMS
:
824 case WLAN_EID_CHALLENGE
:
826 case WLAN_EID_ERP_INFO
:
827 case WLAN_EID_EXT_SUPP_RATES
:
828 case WLAN_EID_HT_CAPABILITY
:
829 case WLAN_EID_HT_OPERATION
:
830 case WLAN_EID_VHT_CAPABILITY
:
831 case WLAN_EID_VHT_OPERATION
:
832 case WLAN_EID_MESH_ID
:
833 case WLAN_EID_MESH_CONFIG
:
834 case WLAN_EID_PEER_MGMT
:
839 case WLAN_EID_CHANNEL_SWITCH
:
840 case WLAN_EID_EXT_CHANSWITCH_ANN
:
841 case WLAN_EID_COUNTRY
:
842 case WLAN_EID_PWR_CONSTRAINT
:
843 case WLAN_EID_TIMEOUT_INTERVAL
:
844 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
845 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
846 case WLAN_EID_CHAN_SWITCH_PARAM
:
847 case WLAN_EID_EXT_CAPABILITY
:
848 case WLAN_EID_CHAN_SWITCH_TIMING
:
849 case WLAN_EID_LINK_ID
:
851 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
852 * that if the content gets bigger it might be needed more than once
854 if (test_bit(id
, seen_elems
)) {
855 elems
->parse_error
= true;
863 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
864 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
866 elem_parse_failed
= false;
869 case WLAN_EID_LINK_ID
:
870 if (elen
+ 2 != sizeof(struct ieee80211_tdls_lnkie
)) {
871 elem_parse_failed
= true;
874 elems
->lnk_id
= (void *)(pos
- 2);
876 case WLAN_EID_CHAN_SWITCH_TIMING
:
877 if (elen
!= sizeof(struct ieee80211_ch_switch_timing
)) {
878 elem_parse_failed
= true;
881 elems
->ch_sw_timing
= (void *)pos
;
883 case WLAN_EID_EXT_CAPABILITY
:
884 elems
->ext_capab
= pos
;
885 elems
->ext_capab_len
= elen
;
889 elems
->ssid_len
= elen
;
891 case WLAN_EID_SUPP_RATES
:
892 elems
->supp_rates
= pos
;
893 elems
->supp_rates_len
= elen
;
895 case WLAN_EID_DS_PARAMS
:
897 elems
->ds_params
= pos
;
899 elem_parse_failed
= true;
902 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
903 elems
->tim
= (void *)pos
;
904 elems
->tim_len
= elen
;
906 elem_parse_failed
= true;
908 case WLAN_EID_CHALLENGE
:
909 elems
->challenge
= pos
;
910 elems
->challenge_len
= elen
;
912 case WLAN_EID_VENDOR_SPECIFIC
:
913 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
915 /* Microsoft OUI (00:50:F2) */
918 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
920 if (elen
>= 5 && pos
[3] == 2) {
921 /* OUI Type 2 - WMM IE */
923 elems
->wmm_info
= pos
;
924 elems
->wmm_info_len
= elen
;
925 } else if (pos
[4] == 1) {
926 elems
->wmm_param
= pos
;
927 elems
->wmm_param_len
= elen
;
934 elems
->rsn_len
= elen
;
936 case WLAN_EID_ERP_INFO
:
938 elems
->erp_info
= pos
;
940 elem_parse_failed
= true;
942 case WLAN_EID_EXT_SUPP_RATES
:
943 elems
->ext_supp_rates
= pos
;
944 elems
->ext_supp_rates_len
= elen
;
946 case WLAN_EID_HT_CAPABILITY
:
947 if (elen
>= sizeof(struct ieee80211_ht_cap
))
948 elems
->ht_cap_elem
= (void *)pos
;
950 elem_parse_failed
= true;
952 case WLAN_EID_HT_OPERATION
:
953 if (elen
>= sizeof(struct ieee80211_ht_operation
))
954 elems
->ht_operation
= (void *)pos
;
956 elem_parse_failed
= true;
958 case WLAN_EID_VHT_CAPABILITY
:
959 if (elen
>= sizeof(struct ieee80211_vht_cap
))
960 elems
->vht_cap_elem
= (void *)pos
;
962 elem_parse_failed
= true;
964 case WLAN_EID_VHT_OPERATION
:
965 if (elen
>= sizeof(struct ieee80211_vht_operation
))
966 elems
->vht_operation
= (void *)pos
;
968 elem_parse_failed
= true;
970 case WLAN_EID_OPMODE_NOTIF
:
972 elems
->opmode_notif
= pos
;
974 elem_parse_failed
= true;
976 case WLAN_EID_MESH_ID
:
977 elems
->mesh_id
= pos
;
978 elems
->mesh_id_len
= elen
;
980 case WLAN_EID_MESH_CONFIG
:
981 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
982 elems
->mesh_config
= (void *)pos
;
984 elem_parse_failed
= true;
986 case WLAN_EID_PEER_MGMT
:
987 elems
->peering
= pos
;
988 elems
->peering_len
= elen
;
990 case WLAN_EID_MESH_AWAKE_WINDOW
:
992 elems
->awake_window
= (void *)pos
;
996 elems
->preq_len
= elen
;
1000 elems
->prep_len
= elen
;
1004 elems
->perr_len
= elen
;
1007 if (elen
>= sizeof(struct ieee80211_rann_ie
))
1008 elems
->rann
= (void *)pos
;
1010 elem_parse_failed
= true;
1012 case WLAN_EID_CHANNEL_SWITCH
:
1013 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
1014 elem_parse_failed
= true;
1017 elems
->ch_switch_ie
= (void *)pos
;
1019 case WLAN_EID_EXT_CHANSWITCH_ANN
:
1020 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
1021 elem_parse_failed
= true;
1024 elems
->ext_chansw_ie
= (void *)pos
;
1026 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
1027 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
1028 elem_parse_failed
= true;
1031 elems
->sec_chan_offs
= (void *)pos
;
1033 case WLAN_EID_CHAN_SWITCH_PARAM
:
1035 sizeof(*elems
->mesh_chansw_params_ie
)) {
1036 elem_parse_failed
= true;
1039 elems
->mesh_chansw_params_ie
= (void *)pos
;
1041 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
1043 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
1044 elem_parse_failed
= true;
1047 elems
->wide_bw_chansw_ie
= (void *)pos
;
1049 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
1051 elem_parse_failed
= true;
1055 * This is a bit tricky, but as we only care about
1056 * the wide bandwidth channel switch element, so
1057 * just parse it out manually.
1059 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
1062 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
1063 elems
->wide_bw_chansw_ie
=
1066 elem_parse_failed
= true;
1069 case WLAN_EID_COUNTRY
:
1070 elems
->country_elem
= pos
;
1071 elems
->country_elem_len
= elen
;
1073 case WLAN_EID_PWR_CONSTRAINT
:
1075 elem_parse_failed
= true;
1078 elems
->pwr_constr_elem
= pos
;
1080 case WLAN_EID_CISCO_VENDOR_SPECIFIC
:
1081 /* Lots of different options exist, but we only care
1082 * about the Dynamic Transmit Power Control element.
1083 * First check for the Cisco OUI, then for the DTPC
1087 elem_parse_failed
= true;
1091 if (pos
[0] != 0x00 || pos
[1] != 0x40 ||
1092 pos
[2] != 0x96 || pos
[3] != 0x00)
1096 elem_parse_failed
= true;
1101 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
1103 elems
->cisco_dtpc_elem
= pos
;
1105 case WLAN_EID_TIMEOUT_INTERVAL
:
1106 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
1107 elems
->timeout_int
= (void *)pos
;
1109 elem_parse_failed
= true;
1115 if (elem_parse_failed
)
1116 elems
->parse_error
= true;
1118 __set_bit(id
, seen_elems
);
1125 elems
->parse_error
= true;
1130 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
1133 struct ieee80211_local
*local
= sdata
->local
;
1134 struct ieee80211_tx_queue_params qparam
;
1135 struct ieee80211_chanctx_conf
*chanctx_conf
;
1137 bool use_11b
, enable_qos
;
1138 bool is_ocb
; /* Use another EDCA parameters if dot11OCBActivated=true */
1141 if (!local
->ops
->conf_tx
)
1144 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1147 memset(&qparam
, 0, sizeof(qparam
));
1150 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1151 use_11b
= (chanctx_conf
&&
1152 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1153 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1157 * By default disable QoS in STA mode for old access points, which do
1158 * not support 802.11e. New APs will provide proper queue parameters,
1159 * that we will configure later.
1161 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
1163 is_ocb
= (sdata
->vif
.type
== NL80211_IFTYPE_OCB
);
1165 /* Set defaults according to 802.11-2007 Table 7-37 */
1172 /* Confiure old 802.11b/g medium access rules. */
1173 qparam
.cw_max
= aCWmax
;
1174 qparam
.cw_min
= aCWmin
;
1178 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1179 /* Update if QoS is enabled. */
1182 case IEEE80211_AC_BK
:
1183 qparam
.cw_max
= aCWmax
;
1184 qparam
.cw_min
= aCWmin
;
1191 /* never happens but let's not leave undefined */
1193 case IEEE80211_AC_BE
:
1194 qparam
.cw_max
= aCWmax
;
1195 qparam
.cw_min
= aCWmin
;
1202 case IEEE80211_AC_VI
:
1203 qparam
.cw_max
= aCWmin
;
1204 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1208 qparam
.txop
= 6016/32;
1210 qparam
.txop
= 3008/32;
1217 case IEEE80211_AC_VO
:
1218 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1219 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1223 qparam
.txop
= 3264/32;
1225 qparam
.txop
= 1504/32;
1231 qparam
.uapsd
= false;
1233 sdata
->tx_conf
[ac
] = qparam
;
1234 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1237 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1238 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1239 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1241 ieee80211_bss_info_change_notify(sdata
,
1246 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1247 u16 transaction
, u16 auth_alg
, u16 status
,
1248 const u8
*extra
, size_t extra_len
, const u8
*da
,
1249 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1252 struct ieee80211_local
*local
= sdata
->local
;
1253 struct sk_buff
*skb
;
1254 struct ieee80211_mgmt
*mgmt
;
1257 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1258 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ IEEE80211_WEP_IV_LEN
+
1259 24 + 6 + extra_len
+ IEEE80211_WEP_ICV_LEN
);
1263 skb_reserve(skb
, local
->hw
.extra_tx_headroom
+ IEEE80211_WEP_IV_LEN
);
1265 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1266 memset(mgmt
, 0, 24 + 6);
1267 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1268 IEEE80211_STYPE_AUTH
);
1269 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1270 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1271 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1272 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1273 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1274 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1276 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1278 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1279 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1280 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1284 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1286 ieee80211_tx_skb(sdata
, skb
);
1289 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1290 const u8
*bssid
, u16 stype
, u16 reason
,
1291 bool send_frame
, u8
*frame_buf
)
1293 struct ieee80211_local
*local
= sdata
->local
;
1294 struct sk_buff
*skb
;
1295 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1298 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1299 mgmt
->duration
= 0; /* initialize only */
1300 mgmt
->seq_ctrl
= 0; /* initialize only */
1301 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1302 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1303 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1304 /* u.deauth.reason_code == u.disassoc.reason_code */
1305 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1308 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1309 IEEE80211_DEAUTH_FRAME_LEN
);
1313 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1316 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1317 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1319 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1320 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1321 IEEE80211_SKB_CB(skb
)->flags
|=
1322 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1324 ieee80211_tx_skb(sdata
, skb
);
1328 static int ieee80211_build_preq_ies_band(struct ieee80211_local
*local
,
1329 u8
*buffer
, size_t buffer_len
,
1330 const u8
*ie
, size_t ie_len
,
1331 enum ieee80211_band band
,
1333 struct cfg80211_chan_def
*chandef
,
1336 struct ieee80211_supported_band
*sband
;
1337 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1339 int supp_rates_len
, i
;
1345 bool have_80mhz
= false;
1349 sband
= local
->hw
.wiphy
->bands
[band
];
1350 if (WARN_ON_ONCE(!sband
))
1353 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1354 shift
= ieee80211_chandef_get_shift(chandef
);
1357 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1358 if ((BIT(i
) & rate_mask
) == 0)
1359 continue; /* skip rate */
1360 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1363 rates
[num_rates
++] =
1364 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1368 supp_rates_len
= min_t(int, num_rates
, 8);
1370 if (end
- pos
< 2 + supp_rates_len
)
1372 *pos
++ = WLAN_EID_SUPP_RATES
;
1373 *pos
++ = supp_rates_len
;
1374 memcpy(pos
, rates
, supp_rates_len
);
1375 pos
+= supp_rates_len
;
1377 /* insert "request information" if in custom IEs */
1379 static const u8 before_extrates
[] = {
1381 WLAN_EID_SUPP_RATES
,
1384 noffset
= ieee80211_ie_split(ie
, ie_len
,
1386 ARRAY_SIZE(before_extrates
),
1388 if (end
- pos
< noffset
- *offset
)
1390 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1391 pos
+= noffset
- *offset
;
1395 ext_rates_len
= num_rates
- supp_rates_len
;
1396 if (ext_rates_len
> 0) {
1397 if (end
- pos
< 2 + ext_rates_len
)
1399 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1400 *pos
++ = ext_rates_len
;
1401 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1402 pos
+= ext_rates_len
;
1405 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1408 *pos
++ = WLAN_EID_DS_PARAMS
;
1410 *pos
++ = ieee80211_frequency_to_channel(
1411 chandef
->chan
->center_freq
);
1414 /* insert custom IEs that go before HT */
1416 static const u8 before_ht
[] = {
1418 WLAN_EID_SUPP_RATES
,
1420 WLAN_EID_EXT_SUPP_RATES
,
1422 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1424 noffset
= ieee80211_ie_split(ie
, ie_len
,
1425 before_ht
, ARRAY_SIZE(before_ht
),
1427 if (end
- pos
< noffset
- *offset
)
1429 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1430 pos
+= noffset
- *offset
;
1434 if (sband
->ht_cap
.ht_supported
) {
1435 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1437 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1442 * If adding more here, adjust code in main.c
1443 * that calculates local->scan_ies_len.
1446 /* insert custom IEs that go before VHT */
1448 static const u8 before_vht
[] = {
1450 WLAN_EID_SUPP_RATES
,
1452 WLAN_EID_EXT_SUPP_RATES
,
1454 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1455 WLAN_EID_HT_CAPABILITY
,
1456 WLAN_EID_BSS_COEX_2040
,
1457 WLAN_EID_EXT_CAPABILITY
,
1459 WLAN_EID_CHANNEL_USAGE
,
1460 WLAN_EID_INTERWORKING
,
1461 /* mesh ID can't happen here */
1462 /* 60 GHz can't happen here right now */
1464 noffset
= ieee80211_ie_split(ie
, ie_len
,
1465 before_vht
, ARRAY_SIZE(before_vht
),
1467 if (end
- pos
< noffset
- *offset
)
1469 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1470 pos
+= noffset
- *offset
;
1474 /* Check if any channel in this sband supports at least 80 MHz */
1475 for (i
= 0; i
< sband
->n_channels
; i
++) {
1476 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
1477 IEEE80211_CHAN_NO_80MHZ
))
1484 if (sband
->vht_cap
.vht_supported
&& have_80mhz
) {
1485 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1487 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1488 sband
->vht_cap
.cap
);
1491 return pos
- buffer
;
1493 WARN_ONCE(1, "not enough space for preq IEs\n");
1494 return pos
- buffer
;
1497 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1499 struct ieee80211_scan_ies
*ie_desc
,
1500 const u8
*ie
, size_t ie_len
,
1501 u8 bands_used
, u32
*rate_masks
,
1502 struct cfg80211_chan_def
*chandef
)
1504 size_t pos
= 0, old_pos
= 0, custom_ie_offset
= 0;
1507 memset(ie_desc
, 0, sizeof(*ie_desc
));
1509 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1510 if (bands_used
& BIT(i
)) {
1511 pos
+= ieee80211_build_preq_ies_band(local
,
1518 ie_desc
->ies
[i
] = buffer
+ old_pos
;
1519 ie_desc
->len
[i
] = pos
- old_pos
;
1524 /* add any remaining custom IEs */
1526 if (WARN_ONCE(buffer_len
- pos
< ie_len
- custom_ie_offset
,
1527 "not enough space for preq custom IEs\n"))
1529 memcpy(buffer
+ pos
, ie
+ custom_ie_offset
,
1530 ie_len
- custom_ie_offset
);
1531 ie_desc
->common_ies
= buffer
+ pos
;
1532 ie_desc
->common_ie_len
= ie_len
- custom_ie_offset
;
1533 pos
+= ie_len
- custom_ie_offset
;
1539 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1540 const u8
*src
, const u8
*dst
,
1542 struct ieee80211_channel
*chan
,
1543 const u8
*ssid
, size_t ssid_len
,
1544 const u8
*ie
, size_t ie_len
,
1547 struct ieee80211_local
*local
= sdata
->local
;
1548 struct cfg80211_chan_def chandef
;
1549 struct sk_buff
*skb
;
1550 struct ieee80211_mgmt
*mgmt
;
1552 u32 rate_masks
[IEEE80211_NUM_BANDS
] = {};
1553 struct ieee80211_scan_ies dummy_ie_desc
;
1556 * Do not send DS Channel parameter for directed probe requests
1557 * in order to maximize the chance that we get a response. Some
1558 * badly-behaved APs don't respond when this parameter is included.
1560 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1562 chandef
.chan
= NULL
;
1564 chandef
.chan
= chan
;
1566 skb
= ieee80211_probereq_get(&local
->hw
, src
, ssid
, ssid_len
,
1571 rate_masks
[chan
->band
] = ratemask
;
1572 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1573 skb_tailroom(skb
), &dummy_ie_desc
,
1574 ie
, ie_len
, BIT(chan
->band
),
1575 rate_masks
, &chandef
);
1576 skb_put(skb
, ies_len
);
1579 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1580 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1581 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1584 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1589 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
,
1590 const u8
*src
, const u8
*dst
,
1591 const u8
*ssid
, size_t ssid_len
,
1592 const u8
*ie
, size_t ie_len
,
1593 u32 ratemask
, bool directed
, u32 tx_flags
,
1594 struct ieee80211_channel
*channel
, bool scan
)
1596 struct sk_buff
*skb
;
1598 skb
= ieee80211_build_probe_req(sdata
, src
, dst
, ratemask
, channel
,
1600 ie
, ie_len
, directed
);
1602 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1604 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1606 ieee80211_tx_skb(sdata
, skb
);
1610 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1611 struct ieee802_11_elems
*elems
,
1612 enum ieee80211_band band
, u32
*basic_rates
)
1614 struct ieee80211_supported_band
*sband
;
1616 u32 supp_rates
, rate_flags
;
1618 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1620 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1621 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1623 if (WARN_ON(!sband
))
1626 num_rates
= sband
->n_bitrates
;
1628 for (i
= 0; i
< elems
->supp_rates_len
+
1629 elems
->ext_supp_rates_len
; i
++) {
1633 if (i
< elems
->supp_rates_len
)
1634 rate
= elems
->supp_rates
[i
];
1635 else if (elems
->ext_supp_rates
)
1636 rate
= elems
->ext_supp_rates
1637 [i
- elems
->supp_rates_len
];
1638 own_rate
= 5 * (rate
& 0x7f);
1639 is_basic
= !!(rate
& 0x80);
1641 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1644 for (j
= 0; j
< num_rates
; j
++) {
1646 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1650 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1653 if (brate
== own_rate
) {
1654 supp_rates
|= BIT(j
);
1655 if (basic_rates
&& is_basic
)
1656 *basic_rates
|= BIT(j
);
1663 void ieee80211_stop_device(struct ieee80211_local
*local
)
1665 ieee80211_led_radio(local
, false);
1666 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1668 cancel_work_sync(&local
->reconfig_filter
);
1670 flush_workqueue(local
->workqueue
);
1674 static void ieee80211_handle_reconfig_failure(struct ieee80211_local
*local
)
1676 struct ieee80211_sub_if_data
*sdata
;
1677 struct ieee80211_chanctx
*ctx
;
1680 * We get here if during resume the device can't be restarted properly.
1681 * We might also get here if this happens during HW reset, which is a
1682 * slightly different situation and we need to drop all connections in
1685 * Ask cfg80211 to turn off all interfaces, this will result in more
1686 * warnings but at least we'll then get into a clean stopped state.
1689 local
->resuming
= false;
1690 local
->suspended
= false;
1691 local
->started
= false;
1693 /* scheduled scan clearly can't be running any more, but tell
1694 * cfg80211 and clear local state
1696 ieee80211_sched_scan_end(local
);
1698 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1699 sdata
->flags
&= ~IEEE80211_SDATA_IN_DRIVER
;
1701 /* Mark channel contexts as not being in the driver any more to avoid
1702 * removing them from the driver during the shutdown process...
1704 mutex_lock(&local
->chanctx_mtx
);
1705 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1706 ctx
->driver_present
= false;
1707 mutex_unlock(&local
->chanctx_mtx
);
1709 cfg80211_shutdown_all_interfaces(local
->hw
.wiphy
);
1712 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1713 struct ieee80211_sub_if_data
*sdata
)
1715 struct ieee80211_chanctx_conf
*conf
;
1716 struct ieee80211_chanctx
*ctx
;
1718 if (!local
->use_chanctx
)
1721 mutex_lock(&local
->chanctx_mtx
);
1722 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1723 lockdep_is_held(&local
->chanctx_mtx
));
1725 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1726 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1728 mutex_unlock(&local
->chanctx_mtx
);
1731 int ieee80211_reconfig(struct ieee80211_local
*local
)
1733 struct ieee80211_hw
*hw
= &local
->hw
;
1734 struct ieee80211_sub_if_data
*sdata
;
1735 struct ieee80211_chanctx
*ctx
;
1736 struct sta_info
*sta
;
1738 bool reconfig_due_to_wowlan
= false;
1739 struct ieee80211_sub_if_data
*sched_scan_sdata
;
1740 struct cfg80211_sched_scan_request
*sched_scan_req
;
1741 bool sched_scan_stopped
= false;
1743 /* nothing to do if HW shouldn't run */
1744 if (!local
->open_count
)
1748 if (local
->suspended
)
1749 local
->resuming
= true;
1751 if (local
->wowlan
) {
1752 res
= drv_resume(local
);
1753 local
->wowlan
= false;
1755 local
->resuming
= false;
1762 * res is 1, which means the driver requested
1763 * to go through a regular reset on wakeup.
1765 reconfig_due_to_wowlan
= true;
1770 * Upon resume hardware can sometimes be goofy due to
1771 * various platform / driver / bus issues, so restarting
1772 * the device may at times not work immediately. Propagate
1775 res
= drv_start(local
);
1777 if (local
->suspended
)
1778 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1780 WARN(1, "Hardware became unavailable during restart.\n");
1781 ieee80211_handle_reconfig_failure(local
);
1785 /* setup fragmentation threshold */
1786 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1788 /* setup RTS threshold */
1789 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1791 /* reset coverage class */
1792 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1794 ieee80211_led_radio(local
, true);
1795 ieee80211_mod_tpt_led_trig(local
,
1796 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1798 /* add interfaces */
1799 sdata
= rtnl_dereference(local
->monitor_sdata
);
1801 /* in HW restart it exists already */
1802 WARN_ON(local
->resuming
);
1803 res
= drv_add_interface(local
, sdata
);
1805 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
1811 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1812 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1813 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1814 ieee80211_sdata_running(sdata
))
1815 res
= drv_add_interface(local
, sdata
);
1818 /* add channel contexts */
1819 if (local
->use_chanctx
) {
1820 mutex_lock(&local
->chanctx_mtx
);
1821 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1822 if (ctx
->replace_state
!=
1823 IEEE80211_CHANCTX_REPLACES_OTHER
)
1824 WARN_ON(drv_add_chanctx(local
, ctx
));
1825 mutex_unlock(&local
->chanctx_mtx
);
1827 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1828 if (!ieee80211_sdata_running(sdata
))
1830 ieee80211_assign_chanctx(local
, sdata
);
1833 sdata
= rtnl_dereference(local
->monitor_sdata
);
1834 if (sdata
&& ieee80211_sdata_running(sdata
))
1835 ieee80211_assign_chanctx(local
, sdata
);
1839 mutex_lock(&local
->sta_mtx
);
1840 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1841 enum ieee80211_sta_state state
;
1846 /* AP-mode stations will be added later */
1847 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1850 for (state
= IEEE80211_STA_NOTEXIST
;
1851 state
< sta
->sta_state
; state
++)
1852 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1855 mutex_unlock(&local
->sta_mtx
);
1857 /* reconfigure tx conf */
1858 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1859 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1860 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1861 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1862 !ieee80211_sdata_running(sdata
))
1865 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1866 drv_conf_tx(local
, sdata
, i
,
1867 &sdata
->tx_conf
[i
]);
1871 /* reconfigure hardware */
1872 ieee80211_hw_config(local
, ~0);
1874 ieee80211_configure_filter(local
);
1876 /* Finally also reconfigure all the BSS information */
1877 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1880 if (!ieee80211_sdata_running(sdata
))
1883 /* common change flags for all interface types */
1884 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1885 BSS_CHANGED_ERP_PREAMBLE
|
1886 BSS_CHANGED_ERP_SLOT
|
1888 BSS_CHANGED_BASIC_RATES
|
1889 BSS_CHANGED_BEACON_INT
|
1894 BSS_CHANGED_TXPOWER
;
1896 switch (sdata
->vif
.type
) {
1897 case NL80211_IFTYPE_STATION
:
1898 changed
|= BSS_CHANGED_ASSOC
|
1899 BSS_CHANGED_ARP_FILTER
|
1902 /* Re-send beacon info report to the driver */
1903 if (sdata
->u
.mgd
.have_beacon
)
1904 changed
|= BSS_CHANGED_BEACON_INFO
;
1907 ieee80211_bss_info_change_notify(sdata
, changed
);
1908 sdata_unlock(sdata
);
1910 case NL80211_IFTYPE_OCB
:
1911 changed
|= BSS_CHANGED_OCB
;
1912 ieee80211_bss_info_change_notify(sdata
, changed
);
1914 case NL80211_IFTYPE_ADHOC
:
1915 changed
|= BSS_CHANGED_IBSS
;
1917 case NL80211_IFTYPE_AP
:
1918 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1920 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1921 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1923 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1924 drv_start_ap(local
, sdata
);
1928 case NL80211_IFTYPE_MESH_POINT
:
1929 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1930 changed
|= BSS_CHANGED_BEACON
|
1931 BSS_CHANGED_BEACON_ENABLED
;
1932 ieee80211_bss_info_change_notify(sdata
, changed
);
1935 case NL80211_IFTYPE_WDS
:
1936 case NL80211_IFTYPE_AP_VLAN
:
1937 case NL80211_IFTYPE_MONITOR
:
1938 case NL80211_IFTYPE_P2P_DEVICE
:
1941 case NL80211_IFTYPE_UNSPECIFIED
:
1942 case NUM_NL80211_IFTYPES
:
1943 case NL80211_IFTYPE_P2P_CLIENT
:
1944 case NL80211_IFTYPE_P2P_GO
:
1950 ieee80211_recalc_ps(local
, -1);
1953 * The sta might be in psm against the ap (e.g. because
1954 * this was the state before a hw restart), so we
1955 * explicitly send a null packet in order to make sure
1956 * it'll sync against the ap (and get out of psm).
1958 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1959 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1960 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1962 if (!sdata
->u
.mgd
.associated
)
1965 ieee80211_send_nullfunc(local
, sdata
, 0);
1969 /* APs are now beaconing, add back stations */
1970 mutex_lock(&local
->sta_mtx
);
1971 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1972 enum ieee80211_sta_state state
;
1977 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1980 for (state
= IEEE80211_STA_NOTEXIST
;
1981 state
< sta
->sta_state
; state
++)
1982 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1985 mutex_unlock(&local
->sta_mtx
);
1988 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1989 if (ieee80211_sdata_running(sdata
))
1990 ieee80211_enable_keys(sdata
);
1993 local
->in_reconfig
= false;
1996 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
1997 ieee80211_add_virtual_monitor(local
);
2000 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2001 * sessions can be established after a resume.
2003 * Also tear down aggregation sessions since reconfiguring
2004 * them in a hardware restart scenario is not easily done
2005 * right now, and the hardware will have lost information
2006 * about the sessions, but we and the AP still think they
2007 * are active. This is really a workaround though.
2009 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
2010 mutex_lock(&local
->sta_mtx
);
2012 list_for_each_entry(sta
, &local
->sta_list
, list
) {
2013 ieee80211_sta_tear_down_BA_sessions(
2014 sta
, AGG_STOP_LOCAL_REQUEST
);
2015 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
2018 mutex_unlock(&local
->sta_mtx
);
2021 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
2022 IEEE80211_QUEUE_STOP_REASON_SUSPEND
,
2026 * Reconfigure sched scan if it was interrupted by FW restart or
2029 mutex_lock(&local
->mtx
);
2030 sched_scan_sdata
= rcu_dereference_protected(local
->sched_scan_sdata
,
2031 lockdep_is_held(&local
->mtx
));
2032 sched_scan_req
= rcu_dereference_protected(local
->sched_scan_req
,
2033 lockdep_is_held(&local
->mtx
));
2034 if (sched_scan_sdata
&& sched_scan_req
)
2036 * Sched scan stopped, but we don't want to report it. Instead,
2037 * we're trying to reschedule.
2039 if (__ieee80211_request_sched_scan_start(sched_scan_sdata
,
2041 sched_scan_stopped
= true;
2042 mutex_unlock(&local
->mtx
);
2044 if (sched_scan_stopped
)
2045 cfg80211_sched_scan_stopped_rtnl(local
->hw
.wiphy
);
2048 * If this is for hw restart things are still running.
2049 * We may want to change that later, however.
2051 if (local
->open_count
&& (!local
->suspended
|| reconfig_due_to_wowlan
))
2052 drv_reconfig_complete(local
, IEEE80211_RECONFIG_TYPE_RESTART
);
2054 if (!local
->suspended
)
2058 /* first set suspended false, then resuming */
2059 local
->suspended
= false;
2061 local
->resuming
= false;
2063 /* It's possible that we don't handle the scan completion in
2064 * time during suspend, so if it's still marked as completed
2065 * here, queue the work and flush it to clean things up.
2066 * Instead of calling the worker function directly here, we
2067 * really queue it to avoid potential races with other flows
2068 * scheduling the same work.
2070 if (test_bit(SCAN_COMPLETED
, &local
->scanning
)) {
2071 ieee80211_queue_delayed_work(&local
->hw
, &local
->scan_work
, 0);
2072 flush_delayed_work(&local
->scan_work
);
2075 if (local
->open_count
&& !reconfig_due_to_wowlan
)
2076 drv_reconfig_complete(local
, IEEE80211_RECONFIG_TYPE_SUSPEND
);
2078 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2079 if (!ieee80211_sdata_running(sdata
))
2081 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2082 ieee80211_sta_restart(sdata
);
2085 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
2093 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
2095 struct ieee80211_sub_if_data
*sdata
;
2096 struct ieee80211_local
*local
;
2097 struct ieee80211_key
*key
;
2102 sdata
= vif_to_sdata(vif
);
2103 local
= sdata
->local
;
2105 if (WARN_ON(!local
->resuming
))
2108 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2111 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
2113 mutex_lock(&local
->key_mtx
);
2114 list_for_each_entry(key
, &sdata
->key_list
, list
)
2115 key
->flags
|= KEY_FLAG_TAINTED
;
2116 mutex_unlock(&local
->key_mtx
);
2118 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
2120 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
2122 struct ieee80211_local
*local
= sdata
->local
;
2123 struct ieee80211_chanctx_conf
*chanctx_conf
;
2124 struct ieee80211_chanctx
*chanctx
;
2126 mutex_lock(&local
->chanctx_mtx
);
2128 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
2129 lockdep_is_held(&local
->chanctx_mtx
));
2131 if (WARN_ON_ONCE(!chanctx_conf
))
2134 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
2135 ieee80211_recalc_smps_chanctx(local
, chanctx
);
2137 mutex_unlock(&local
->chanctx_mtx
);
2140 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data
*sdata
)
2142 struct ieee80211_local
*local
= sdata
->local
;
2143 struct ieee80211_chanctx_conf
*chanctx_conf
;
2144 struct ieee80211_chanctx
*chanctx
;
2146 mutex_lock(&local
->chanctx_mtx
);
2148 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
2149 lockdep_is_held(&local
->chanctx_mtx
));
2151 if (WARN_ON_ONCE(!chanctx_conf
))
2154 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
2155 ieee80211_recalc_chanctx_min_def(local
, chanctx
);
2157 mutex_unlock(&local
->chanctx_mtx
);
2160 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
2164 for (i
= 0; i
< n_ids
; i
++)
2170 size_t ieee80211_ie_split_ric(const u8
*ies
, size_t ielen
,
2171 const u8
*ids
, int n_ids
,
2172 const u8
*after_ric
, int n_after_ric
,
2175 size_t pos
= offset
;
2177 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
])) {
2178 if (ies
[pos
] == WLAN_EID_RIC_DATA
&& n_after_ric
) {
2179 pos
+= 2 + ies
[pos
+ 1];
2181 while (pos
< ielen
&&
2182 !ieee80211_id_in_list(after_ric
, n_after_ric
,
2184 pos
+= 2 + ies
[pos
+ 1];
2186 pos
+= 2 + ies
[pos
+ 1];
2193 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
2194 const u8
*ids
, int n_ids
, size_t offset
)
2196 return ieee80211_ie_split_ric(ies
, ielen
, ids
, n_ids
, NULL
, 0, offset
);
2198 EXPORT_SYMBOL(ieee80211_ie_split
);
2200 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
2202 size_t pos
= offset
;
2204 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
2205 pos
+= 2 + ies
[pos
+ 1];
2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
2214 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
2216 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2220 * Scale up threshold values before storing it, as the RSSI averaging
2221 * algorithm uses a scaled up value as well. Change this scaling
2222 * factor if the RSSI averaging algorithm changes.
2224 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
2225 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
2232 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2234 WARN_ON(rssi_min_thold
== rssi_max_thold
||
2235 rssi_min_thold
> rssi_max_thold
);
2237 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
2244 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2246 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
2250 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2255 *pos
++ = WLAN_EID_HT_CAPABILITY
;
2256 *pos
++ = sizeof(struct ieee80211_ht_cap
);
2257 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
2259 /* capability flags */
2260 tmp
= cpu_to_le16(cap
);
2261 memcpy(pos
, &tmp
, sizeof(u16
));
2264 /* AMPDU parameters */
2265 *pos
++ = ht_cap
->ampdu_factor
|
2266 (ht_cap
->ampdu_density
<<
2267 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
2270 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
2271 pos
+= sizeof(ht_cap
->mcs
);
2273 /* extended capabilities */
2274 pos
+= sizeof(__le16
);
2276 /* BF capabilities */
2277 pos
+= sizeof(__le32
);
2279 /* antenna selection */
2285 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
2290 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
2291 *pos
++ = sizeof(struct ieee80211_vht_cap
);
2292 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
2294 /* capability flags */
2295 tmp
= cpu_to_le32(cap
);
2296 memcpy(pos
, &tmp
, sizeof(u32
));
2300 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
2301 pos
+= sizeof(vht_cap
->vht_mcs
);
2306 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2307 const struct cfg80211_chan_def
*chandef
,
2310 struct ieee80211_ht_operation
*ht_oper
;
2311 /* Build HT Information */
2312 *pos
++ = WLAN_EID_HT_OPERATION
;
2313 *pos
++ = sizeof(struct ieee80211_ht_operation
);
2314 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
2315 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
2316 chandef
->chan
->center_freq
);
2317 switch (chandef
->width
) {
2318 case NL80211_CHAN_WIDTH_160
:
2319 case NL80211_CHAN_WIDTH_80P80
:
2320 case NL80211_CHAN_WIDTH_80
:
2321 case NL80211_CHAN_WIDTH_40
:
2322 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
2323 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2325 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2328 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
2331 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
2332 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
2333 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
2334 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
2336 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
2337 ht_oper
->stbc_param
= 0x0000;
2339 /* It seems that Basic MCS set and Supported MCS set
2340 are identical for the first 10 bytes */
2341 memset(&ht_oper
->basic_set
, 0, 16);
2342 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
2344 return pos
+ sizeof(struct ieee80211_ht_operation
);
2347 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2348 const struct ieee80211_ht_operation
*ht_oper
,
2349 struct cfg80211_chan_def
*chandef
)
2351 enum nl80211_channel_type channel_type
;
2354 cfg80211_chandef_create(chandef
, control_chan
,
2355 NL80211_CHAN_NO_HT
);
2359 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2360 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2361 channel_type
= NL80211_CHAN_HT20
;
2363 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2364 channel_type
= NL80211_CHAN_HT40PLUS
;
2366 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2367 channel_type
= NL80211_CHAN_HT40MINUS
;
2370 channel_type
= NL80211_CHAN_NO_HT
;
2373 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2376 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2377 const struct ieee80211_supported_band
*sband
,
2378 const u8
*srates
, int srates_len
, u32
*rates
)
2380 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2381 int shift
= ieee80211_chandef_get_shift(chandef
);
2382 struct ieee80211_rate
*br
;
2383 int brate
, rate
, i
, j
, count
= 0;
2387 for (i
= 0; i
< srates_len
; i
++) {
2388 rate
= srates
[i
] & 0x7f;
2390 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2391 br
= &sband
->bitrates
[j
];
2392 if ((rate_flags
& br
->flags
) != rate_flags
)
2395 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2396 if (brate
== rate
) {
2406 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2407 struct sk_buff
*skb
, bool need_basic
,
2408 enum ieee80211_band band
)
2410 struct ieee80211_local
*local
= sdata
->local
;
2411 struct ieee80211_supported_band
*sband
;
2414 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2417 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2418 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2419 sband
= local
->hw
.wiphy
->bands
[band
];
2421 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2422 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2429 if (skb_tailroom(skb
) < rates
+ 2)
2432 pos
= skb_put(skb
, rates
+ 2);
2433 *pos
++ = WLAN_EID_SUPP_RATES
;
2435 for (i
= 0; i
< rates
; i
++) {
2437 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2440 if (need_basic
&& basic_rates
& BIT(i
))
2442 rate
= sband
->bitrates
[i
].bitrate
;
2443 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2445 *pos
++ = basic
| (u8
) rate
;
2451 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2452 struct sk_buff
*skb
, bool need_basic
,
2453 enum ieee80211_band band
)
2455 struct ieee80211_local
*local
= sdata
->local
;
2456 struct ieee80211_supported_band
*sband
;
2458 u8 i
, exrates
, *pos
;
2459 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2462 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2463 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2465 sband
= local
->hw
.wiphy
->bands
[band
];
2467 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2468 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2478 if (skb_tailroom(skb
) < exrates
+ 2)
2482 pos
= skb_put(skb
, exrates
+ 2);
2483 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2485 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2487 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2490 if (need_basic
&& basic_rates
& BIT(i
))
2492 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2494 *pos
++ = basic
| (u8
) rate
;
2500 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2502 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2503 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2505 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2506 /* non-managed type inferfaces */
2509 return ifmgd
->ave_beacon_signal
/ 16;
2511 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2513 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2518 /* TODO: consider rx_highest */
2520 if (mcs
->rx_mask
[3])
2522 if (mcs
->rx_mask
[2])
2524 if (mcs
->rx_mask
[1])
2530 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2531 * @local: mac80211 hw info struct
2532 * @status: RX status
2533 * @mpdu_len: total MPDU length (including FCS)
2534 * @mpdu_offset: offset into MPDU to calculate timestamp at
2536 * This function calculates the RX timestamp at the given MPDU offset, taking
2537 * into account what the RX timestamp was. An offset of 0 will just normalize
2538 * the timestamp to TSF at beginning of MPDU reception.
2540 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2541 struct ieee80211_rx_status
*status
,
2542 unsigned int mpdu_len
,
2543 unsigned int mpdu_offset
)
2545 u64 ts
= status
->mactime
;
2546 struct rate_info ri
;
2549 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2552 memset(&ri
, 0, sizeof(ri
));
2554 /* Fill cfg80211 rate info */
2555 if (status
->flag
& RX_FLAG_HT
) {
2556 ri
.mcs
= status
->rate_idx
;
2557 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2558 if (status
->flag
& RX_FLAG_40MHZ
)
2559 ri
.bw
= RATE_INFO_BW_40
;
2561 ri
.bw
= RATE_INFO_BW_20
;
2562 if (status
->flag
& RX_FLAG_SHORT_GI
)
2563 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2564 } else if (status
->flag
& RX_FLAG_VHT
) {
2565 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2566 ri
.mcs
= status
->rate_idx
;
2567 ri
.nss
= status
->vht_nss
;
2568 if (status
->flag
& RX_FLAG_40MHZ
)
2569 ri
.bw
= RATE_INFO_BW_40
;
2570 else if (status
->vht_flag
& RX_VHT_FLAG_80MHZ
)
2571 ri
.bw
= RATE_INFO_BW_80
;
2572 else if (status
->vht_flag
& RX_VHT_FLAG_160MHZ
)
2573 ri
.bw
= RATE_INFO_BW_160
;
2575 ri
.bw
= RATE_INFO_BW_20
;
2576 if (status
->flag
& RX_FLAG_SHORT_GI
)
2577 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2579 struct ieee80211_supported_band
*sband
;
2583 if (status
->flag
& RX_FLAG_10MHZ
) {
2585 ri
.bw
= RATE_INFO_BW_10
;
2586 } else if (status
->flag
& RX_FLAG_5MHZ
) {
2588 ri
.bw
= RATE_INFO_BW_5
;
2590 ri
.bw
= RATE_INFO_BW_20
;
2593 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2594 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2595 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2598 rate
= cfg80211_calculate_bitrate(&ri
);
2599 if (WARN_ONCE(!rate
,
2600 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2601 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2604 /* rewind from end of MPDU */
2605 if (status
->flag
& RX_FLAG_MACTIME_END
)
2606 ts
-= mpdu_len
* 8 * 10 / rate
;
2608 ts
+= mpdu_offset
* 8 * 10 / rate
;
2613 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2615 struct ieee80211_sub_if_data
*sdata
;
2616 struct cfg80211_chan_def chandef
;
2618 mutex_lock(&local
->mtx
);
2619 mutex_lock(&local
->iflist_mtx
);
2620 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2621 /* it might be waiting for the local->mtx, but then
2622 * by the time it gets it, sdata->wdev.cac_started
2623 * will no longer be true
2625 cancel_delayed_work(&sdata
->dfs_cac_timer_work
);
2627 if (sdata
->wdev
.cac_started
) {
2628 chandef
= sdata
->vif
.bss_conf
.chandef
;
2629 ieee80211_vif_release_channel(sdata
);
2630 cfg80211_cac_event(sdata
->dev
,
2632 NL80211_RADAR_CAC_ABORTED
,
2636 mutex_unlock(&local
->iflist_mtx
);
2637 mutex_unlock(&local
->mtx
);
2640 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2642 struct ieee80211_local
*local
=
2643 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2644 struct cfg80211_chan_def chandef
= local
->hw
.conf
.chandef
;
2645 struct ieee80211_chanctx
*ctx
;
2646 int num_chanctx
= 0;
2648 mutex_lock(&local
->chanctx_mtx
);
2649 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
2650 if (ctx
->replace_state
== IEEE80211_CHANCTX_REPLACES_OTHER
)
2654 chandef
= ctx
->conf
.def
;
2656 mutex_unlock(&local
->chanctx_mtx
);
2658 ieee80211_dfs_cac_cancel(local
);
2660 if (num_chanctx
> 1)
2661 /* XXX: multi-channel is not supported yet */
2664 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2667 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2669 struct ieee80211_local
*local
= hw_to_local(hw
);
2671 trace_api_radar_detected(local
);
2673 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2675 EXPORT_SYMBOL(ieee80211_radar_detected
);
2677 u32
ieee80211_chandef_downgrade(struct cfg80211_chan_def
*c
)
2683 case NL80211_CHAN_WIDTH_20
:
2684 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2685 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2687 case NL80211_CHAN_WIDTH_40
:
2688 c
->width
= NL80211_CHAN_WIDTH_20
;
2689 c
->center_freq1
= c
->chan
->center_freq
;
2690 ret
= IEEE80211_STA_DISABLE_40MHZ
|
2691 IEEE80211_STA_DISABLE_VHT
;
2693 case NL80211_CHAN_WIDTH_80
:
2694 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2698 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
2699 c
->width
= NL80211_CHAN_WIDTH_40
;
2700 ret
= IEEE80211_STA_DISABLE_VHT
;
2702 case NL80211_CHAN_WIDTH_80P80
:
2703 c
->center_freq2
= 0;
2704 c
->width
= NL80211_CHAN_WIDTH_80
;
2705 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2706 IEEE80211_STA_DISABLE_160MHZ
;
2708 case NL80211_CHAN_WIDTH_160
:
2710 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2713 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
2714 c
->width
= NL80211_CHAN_WIDTH_80
;
2715 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2716 IEEE80211_STA_DISABLE_160MHZ
;
2719 case NL80211_CHAN_WIDTH_20_NOHT
:
2721 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2722 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2724 case NL80211_CHAN_WIDTH_5
:
2725 case NL80211_CHAN_WIDTH_10
:
2728 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2732 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
2738 * Returns true if smps_mode_new is strictly more restrictive than
2741 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old
,
2742 enum ieee80211_smps_mode smps_mode_new
)
2744 if (WARN_ON_ONCE(smps_mode_old
== IEEE80211_SMPS_AUTOMATIC
||
2745 smps_mode_new
== IEEE80211_SMPS_AUTOMATIC
))
2748 switch (smps_mode_old
) {
2749 case IEEE80211_SMPS_STATIC
:
2751 case IEEE80211_SMPS_DYNAMIC
:
2752 return smps_mode_new
== IEEE80211_SMPS_STATIC
;
2753 case IEEE80211_SMPS_OFF
:
2754 return smps_mode_new
!= IEEE80211_SMPS_OFF
;
2762 int ieee80211_send_action_csa(struct ieee80211_sub_if_data
*sdata
,
2763 struct cfg80211_csa_settings
*csa_settings
)
2765 struct sk_buff
*skb
;
2766 struct ieee80211_mgmt
*mgmt
;
2767 struct ieee80211_local
*local
= sdata
->local
;
2769 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.chan_switch
) +
2770 sizeof(mgmt
->u
.action
.u
.chan_switch
);
2773 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2774 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2777 skb
= dev_alloc_skb(local
->tx_headroom
+ hdr_len
+
2778 5 + /* channel switch announcement element */
2779 3 + /* secondary channel offset element */
2780 8); /* mesh channel switch parameters element */
2784 skb_reserve(skb
, local
->tx_headroom
);
2785 mgmt
= (struct ieee80211_mgmt
*)skb_put(skb
, hdr_len
);
2786 memset(mgmt
, 0, hdr_len
);
2787 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2788 IEEE80211_STYPE_ACTION
);
2790 eth_broadcast_addr(mgmt
->da
);
2791 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2792 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2793 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2795 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2796 memcpy(mgmt
->bssid
, ifibss
->bssid
, ETH_ALEN
);
2798 mgmt
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
2799 mgmt
->u
.action
.u
.chan_switch
.action_code
= WLAN_ACTION_SPCT_CHL_SWITCH
;
2800 pos
= skb_put(skb
, 5);
2801 *pos
++ = WLAN_EID_CHANNEL_SWITCH
; /* EID */
2802 *pos
++ = 3; /* IE length */
2803 *pos
++ = csa_settings
->block_tx
? 1 : 0; /* CSA mode */
2804 freq
= csa_settings
->chandef
.chan
->center_freq
;
2805 *pos
++ = ieee80211_frequency_to_channel(freq
); /* channel */
2806 *pos
++ = csa_settings
->count
; /* count */
2808 if (csa_settings
->chandef
.width
== NL80211_CHAN_WIDTH_40
) {
2809 enum nl80211_channel_type ch_type
;
2812 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
2813 *pos
++ = 1; /* IE length */
2814 ch_type
= cfg80211_get_chandef_type(&csa_settings
->chandef
);
2815 if (ch_type
== NL80211_CHAN_HT40PLUS
)
2816 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2818 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2821 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2822 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2825 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
; /* EID */
2826 *pos
++ = 6; /* IE length */
2827 *pos
++ = sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
; /* Mesh TTL */
2828 *pos
= 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2829 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
2830 *pos
++ |= csa_settings
->block_tx
?
2831 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
2832 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
); /* Reason Cd */
2834 put_unaligned_le16(ifmsh
->pre_value
, pos
);/* Precedence Value */
2838 ieee80211_tx_skb(sdata
, skb
);
2842 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme
*cs
)
2844 return !(cs
== NULL
|| cs
->cipher
== 0 ||
2845 cs
->hdr_len
< cs
->pn_len
+ cs
->pn_off
||
2846 cs
->hdr_len
<= cs
->key_idx_off
||
2847 cs
->key_idx_shift
> 7 ||
2848 cs
->key_idx_mask
== 0);
2851 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme
*cs
, int n
)
2855 /* Ensure we have enough iftype bitmap space for all iftype values */
2856 WARN_ON((NUM_NL80211_IFTYPES
/ 8 + 1) > sizeof(cs
[0].iftype
));
2858 for (i
= 0; i
< n
; i
++)
2859 if (!ieee80211_cs_valid(&cs
[i
]))
2865 const struct ieee80211_cipher_scheme
*
2866 ieee80211_cs_get(struct ieee80211_local
*local
, u32 cipher
,
2867 enum nl80211_iftype iftype
)
2869 const struct ieee80211_cipher_scheme
*l
= local
->hw
.cipher_schemes
;
2870 int n
= local
->hw
.n_cipher_schemes
;
2872 const struct ieee80211_cipher_scheme
*cs
= NULL
;
2874 for (i
= 0; i
< n
; i
++) {
2875 if (l
[i
].cipher
== cipher
) {
2881 if (!cs
|| !(cs
->iftype
& BIT(iftype
)))
2887 int ieee80211_cs_headroom(struct ieee80211_local
*local
,
2888 struct cfg80211_crypto_settings
*crypto
,
2889 enum nl80211_iftype iftype
)
2891 const struct ieee80211_cipher_scheme
*cs
;
2892 int headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2895 for (i
= 0; i
< crypto
->n_ciphers_pairwise
; i
++) {
2896 cs
= ieee80211_cs_get(local
, crypto
->ciphers_pairwise
[i
],
2899 if (cs
&& headroom
< cs
->hdr_len
)
2900 headroom
= cs
->hdr_len
;
2903 cs
= ieee80211_cs_get(local
, crypto
->cipher_group
, iftype
);
2904 if (cs
&& headroom
< cs
->hdr_len
)
2905 headroom
= cs
->hdr_len
;
2911 ieee80211_extend_noa_desc(struct ieee80211_noa_data
*data
, u32 tsf
, int i
)
2913 s32 end
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- (tsf
+ 1);
2919 /* End time is in the past, check for repetitions */
2920 skip
= DIV_ROUND_UP(-end
, data
->desc
[i
].interval
);
2921 if (data
->count
[i
] < 255) {
2922 if (data
->count
[i
] <= skip
) {
2927 data
->count
[i
] -= skip
;
2930 data
->desc
[i
].start
+= skip
* data
->desc
[i
].interval
;
2936 ieee80211_extend_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
,
2942 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2945 if (!data
->count
[i
])
2948 if (ieee80211_extend_noa_desc(data
, tsf
+ *offset
, i
))
2951 cur
= data
->desc
[i
].start
- tsf
;
2955 cur
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- tsf
;
2964 ieee80211_get_noa_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
)
2969 * arbitrary limit, used to avoid infinite loops when combined NoA
2970 * descriptors cover the full time period.
2974 ieee80211_extend_absent_time(data
, tsf
, &offset
);
2976 if (!ieee80211_extend_absent_time(data
, tsf
, &offset
))
2980 } while (tries
< max_tries
);
2985 void ieee80211_update_p2p_noa(struct ieee80211_noa_data
*data
, u32 tsf
)
2987 u32 next_offset
= BIT(31) - 1;
2991 data
->has_next_tsf
= false;
2992 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2995 if (!data
->count
[i
])
2998 ieee80211_extend_noa_desc(data
, tsf
, i
);
2999 start
= data
->desc
[i
].start
- tsf
;
3001 data
->absent
|= BIT(i
);
3003 if (next_offset
> start
)
3004 next_offset
= start
;
3006 data
->has_next_tsf
= true;
3010 next_offset
= ieee80211_get_noa_absent_time(data
, tsf
);
3012 data
->next_tsf
= tsf
+ next_offset
;
3014 EXPORT_SYMBOL(ieee80211_update_p2p_noa
);
3016 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr
*attr
,
3017 struct ieee80211_noa_data
*data
, u32 tsf
)
3022 memset(data
, 0, sizeof(*data
));
3024 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
3025 const struct ieee80211_p2p_noa_desc
*desc
= &attr
->desc
[i
];
3027 if (!desc
->count
|| !desc
->duration
)
3030 data
->count
[i
] = desc
->count
;
3031 data
->desc
[i
].start
= le32_to_cpu(desc
->start_time
);
3032 data
->desc
[i
].duration
= le32_to_cpu(desc
->duration
);
3033 data
->desc
[i
].interval
= le32_to_cpu(desc
->interval
);
3035 if (data
->count
[i
] > 1 &&
3036 data
->desc
[i
].interval
< data
->desc
[i
].duration
)
3039 ieee80211_extend_noa_desc(data
, tsf
, i
);
3044 ieee80211_update_p2p_noa(data
, tsf
);
3048 EXPORT_SYMBOL(ieee80211_parse_p2p_noa
);
3050 void ieee80211_recalc_dtim(struct ieee80211_local
*local
,
3051 struct ieee80211_sub_if_data
*sdata
)
3053 u64 tsf
= drv_get_tsf(local
, sdata
);
3055 u16 beacon_int
= sdata
->vif
.bss_conf
.beacon_int
* 1024;
3056 u8 dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
3060 if (tsf
== -1ULL || !beacon_int
|| !dtim_period
)
3063 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3064 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
3068 ps
= &sdata
->bss
->ps
;
3069 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
3070 ps
= &sdata
->u
.mesh
.ps
;
3076 * actually finds last dtim_count, mac80211 will update in
3077 * __beacon_add_tim().
3078 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3080 do_div(tsf
, beacon_int
);
3081 bcns_from_dtim
= do_div(tsf
, dtim_period
);
3082 /* just had a DTIM */
3083 if (!bcns_from_dtim
)
3086 dtim_count
= dtim_period
- bcns_from_dtim
;
3088 ps
->dtim_count
= dtim_count
;
3091 static u8
ieee80211_chanctx_radar_detect(struct ieee80211_local
*local
,
3092 struct ieee80211_chanctx
*ctx
)
3094 struct ieee80211_sub_if_data
*sdata
;
3095 u8 radar_detect
= 0;
3097 lockdep_assert_held(&local
->chanctx_mtx
);
3099 if (WARN_ON(ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
))
3102 list_for_each_entry(sdata
, &ctx
->reserved_vifs
, reserved_chanctx_list
)
3103 if (sdata
->reserved_radar_required
)
3104 radar_detect
|= BIT(sdata
->reserved_chandef
.width
);
3107 * An in-place reservation context should not have any assigned vifs
3108 * until it replaces the other context.
3110 WARN_ON(ctx
->replace_state
== IEEE80211_CHANCTX_REPLACES_OTHER
&&
3111 !list_empty(&ctx
->assigned_vifs
));
3113 list_for_each_entry(sdata
, &ctx
->assigned_vifs
, assigned_chanctx_list
)
3114 if (sdata
->radar_required
)
3115 radar_detect
|= BIT(sdata
->vif
.bss_conf
.chandef
.width
);
3117 return radar_detect
;
3120 int ieee80211_check_combinations(struct ieee80211_sub_if_data
*sdata
,
3121 const struct cfg80211_chan_def
*chandef
,
3122 enum ieee80211_chanctx_mode chanmode
,
3125 struct ieee80211_local
*local
= sdata
->local
;
3126 struct ieee80211_sub_if_data
*sdata_iter
;
3127 enum nl80211_iftype iftype
= sdata
->wdev
.iftype
;
3128 int num
[NUM_NL80211_IFTYPES
];
3129 struct ieee80211_chanctx
*ctx
;
3130 int num_different_channels
= 0;
3133 lockdep_assert_held(&local
->chanctx_mtx
);
3135 if (WARN_ON(hweight32(radar_detect
) > 1))
3138 if (WARN_ON(chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
3143 num_different_channels
= 1;
3145 if (WARN_ON(iftype
>= NUM_NL80211_IFTYPES
))
3148 /* Always allow software iftypes */
3149 if (local
->hw
.wiphy
->software_iftypes
& BIT(iftype
)) {
3155 memset(num
, 0, sizeof(num
));
3157 if (iftype
!= NL80211_IFTYPE_UNSPECIFIED
)
3160 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
3161 if (ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
)
3163 radar_detect
|= ieee80211_chanctx_radar_detect(local
, ctx
);
3164 if (ctx
->mode
== IEEE80211_CHANCTX_EXCLUSIVE
) {
3165 num_different_channels
++;
3168 if (chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
3169 cfg80211_chandef_compatible(chandef
,
3172 num_different_channels
++;
3175 list_for_each_entry_rcu(sdata_iter
, &local
->interfaces
, list
) {
3176 struct wireless_dev
*wdev_iter
;
3178 wdev_iter
= &sdata_iter
->wdev
;
3180 if (sdata_iter
== sdata
||
3181 !ieee80211_sdata_running(sdata_iter
) ||
3182 local
->hw
.wiphy
->software_iftypes
& BIT(wdev_iter
->iftype
))
3185 num
[wdev_iter
->iftype
]++;
3189 if (total
== 1 && !radar_detect
)
3192 return cfg80211_check_combinations(local
->hw
.wiphy
,
3193 num_different_channels
,
3198 ieee80211_iter_max_chans(const struct ieee80211_iface_combination
*c
,
3201 u32
*max_num_different_channels
= data
;
3203 *max_num_different_channels
= max(*max_num_different_channels
,
3204 c
->num_different_channels
);
3207 int ieee80211_max_num_channels(struct ieee80211_local
*local
)
3209 struct ieee80211_sub_if_data
*sdata
;
3210 int num
[NUM_NL80211_IFTYPES
] = {};
3211 struct ieee80211_chanctx
*ctx
;
3212 int num_different_channels
= 0;
3213 u8 radar_detect
= 0;
3214 u32 max_num_different_channels
= 1;
3217 lockdep_assert_held(&local
->chanctx_mtx
);
3219 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
3220 if (ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
)
3223 num_different_channels
++;
3225 radar_detect
|= ieee80211_chanctx_radar_detect(local
, ctx
);
3228 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3229 num
[sdata
->wdev
.iftype
]++;
3231 err
= cfg80211_iter_combinations(local
->hw
.wiphy
,
3232 num_different_channels
, radar_detect
,
3233 num
, ieee80211_iter_max_chans
,
3234 &max_num_different_channels
);
3238 return max_num_different_channels
;
3241 u8
*ieee80211_add_wmm_info_ie(u8
*buf
, u8 qosinfo
)
3243 *buf
++ = WLAN_EID_VENDOR_SPECIFIC
;
3244 *buf
++ = 7; /* len */
3245 *buf
++ = 0x00; /* Microsoft OUI 00:50:F2 */
3248 *buf
++ = 2; /* WME */
3249 *buf
++ = 0; /* WME info */
3250 *buf
++ = 1; /* WME ver */
3251 *buf
++ = qosinfo
; /* U-APSD no in use */