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 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
53 struct ieee80211_hdr
*hdr
;
55 skb_queue_walk(&tx
->skbs
, skb
) {
56 hdr
= (struct ieee80211_hdr
*) skb
->data
;
57 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
61 int ieee80211_frame_duration(enum ieee80211_band band
, size_t len
,
62 int rate
, int erp
, int short_preamble
,
67 /* calculate duration (in microseconds, rounded up to next higher
68 * integer if it includes a fractional microsecond) to send frame of
69 * len bytes (does not include FCS) at the given rate. Duration will
72 * rate is in 100 kbps, so divident is multiplied by 10 in the
73 * DIV_ROUND_UP() operations.
75 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
76 * is assumed to be 0 otherwise.
79 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
83 * N_DBPS = DATARATE x 4
84 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
85 * (16 = SIGNAL time, 6 = tail bits)
86 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
89 * 802.11a - 18.5.2: aSIFSTime = 16 usec
90 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
93 dur
= 16; /* SIFS + signal ext */
94 dur
+= 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
95 dur
+= 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
97 /* IEEE 802.11-2012 18.3.2.4: all values above are:
99 * * times 2 for 10 MHz
103 /* rates should already consider the channel bandwidth,
104 * don't apply divisor again.
106 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
107 4 * rate
); /* T_SYM x N_SYM */
110 * 802.11b or 802.11g with 802.11b compatibility:
111 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
112 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
114 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
115 * aSIFSTime = 10 usec
116 * aPreambleLength = 144 usec or 72 usec with short preamble
117 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
119 dur
= 10; /* aSIFSTime = 10 usec */
120 dur
+= short_preamble
? (72 + 24) : (144 + 48);
122 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
128 /* Exported duration function for driver use */
129 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
130 struct ieee80211_vif
*vif
,
131 enum ieee80211_band band
,
133 struct ieee80211_rate
*rate
)
135 struct ieee80211_sub_if_data
*sdata
;
138 bool short_preamble
= false;
142 sdata
= vif_to_sdata(vif
);
143 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
144 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
145 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
146 shift
= ieee80211_vif_get_shift(vif
);
149 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
150 short_preamble
, shift
);
152 return cpu_to_le16(dur
);
154 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
156 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
157 struct ieee80211_vif
*vif
, size_t frame_len
,
158 const struct ieee80211_tx_info
*frame_txctl
)
160 struct ieee80211_local
*local
= hw_to_local(hw
);
161 struct ieee80211_rate
*rate
;
162 struct ieee80211_sub_if_data
*sdata
;
164 int erp
, shift
= 0, bitrate
;
166 struct ieee80211_supported_band
*sband
;
168 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
170 short_preamble
= false;
172 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
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
;
180 shift
= ieee80211_vif_get_shift(vif
);
183 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
186 dur
= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
187 erp
, short_preamble
, shift
);
188 /* Data frame duration */
189 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
190 erp
, short_preamble
, shift
);
192 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
193 erp
, short_preamble
, shift
);
195 return cpu_to_le16(dur
);
197 EXPORT_SYMBOL(ieee80211_rts_duration
);
199 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
200 struct ieee80211_vif
*vif
,
202 const struct ieee80211_tx_info
*frame_txctl
)
204 struct ieee80211_local
*local
= hw_to_local(hw
);
205 struct ieee80211_rate
*rate
;
206 struct ieee80211_sub_if_data
*sdata
;
208 int erp
, shift
= 0, bitrate
;
210 struct ieee80211_supported_band
*sband
;
212 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
214 short_preamble
= false;
216 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
219 sdata
= vif_to_sdata(vif
);
220 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
221 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
222 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
223 shift
= ieee80211_vif_get_shift(vif
);
226 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
228 /* Data frame duration */
229 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
230 erp
, short_preamble
, shift
);
231 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
233 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
234 erp
, short_preamble
, shift
);
237 return cpu_to_le16(dur
);
239 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
241 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
243 struct ieee80211_sub_if_data
*sdata
;
244 int n_acs
= IEEE80211_NUM_ACS
;
246 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
249 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
255 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
256 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
259 for (ac
= 0; ac
< n_acs
; ac
++) {
260 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
262 if (local
->ops
->wake_tx_queue
&&
263 (atomic_read(&sdata
->txqs_len
[ac
]) >
264 local
->hw
.txq_ac_max_pending
))
267 if (ac_queue
== queue
||
268 (sdata
->vif
.cab_queue
== queue
&&
269 local
->queue_stop_reasons
[ac_queue
] == 0 &&
270 skb_queue_empty(&local
->pending
[ac_queue
])))
271 netif_wake_subqueue(sdata
->dev
, ac
);
276 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
277 enum queue_stop_reason reason
,
280 struct ieee80211_local
*local
= hw_to_local(hw
);
282 trace_wake_queue(local
, queue
, reason
);
284 if (WARN_ON(queue
>= hw
->queues
))
287 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
291 local
->q_stop_reasons
[queue
][reason
] = 0;
293 local
->q_stop_reasons
[queue
][reason
]--;
295 if (local
->q_stop_reasons
[queue
][reason
] == 0)
296 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
298 if (local
->queue_stop_reasons
[queue
] != 0)
299 /* someone still has this queue stopped */
302 if (skb_queue_empty(&local
->pending
[queue
])) {
304 ieee80211_propagate_queue_wake(local
, queue
);
307 tasklet_schedule(&local
->tx_pending_tasklet
);
310 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
311 enum queue_stop_reason reason
,
314 struct ieee80211_local
*local
= hw_to_local(hw
);
317 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
318 __ieee80211_wake_queue(hw
, queue
, reason
, refcounted
);
319 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
322 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
324 ieee80211_wake_queue_by_reason(hw
, queue
,
325 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
328 EXPORT_SYMBOL(ieee80211_wake_queue
);
330 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
331 enum queue_stop_reason reason
,
334 struct ieee80211_local
*local
= hw_to_local(hw
);
335 struct ieee80211_sub_if_data
*sdata
;
336 int n_acs
= IEEE80211_NUM_ACS
;
338 trace_stop_queue(local
, queue
, reason
);
340 if (WARN_ON(queue
>= hw
->queues
))
344 local
->q_stop_reasons
[queue
][reason
] = 1;
346 local
->q_stop_reasons
[queue
][reason
]++;
348 if (__test_and_set_bit(reason
, &local
->queue_stop_reasons
[queue
]))
351 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
355 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
361 for (ac
= 0; ac
< n_acs
; ac
++) {
362 if (sdata
->vif
.hw_queue
[ac
] == queue
||
363 sdata
->vif
.cab_queue
== queue
)
364 netif_stop_subqueue(sdata
->dev
, ac
);
370 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
371 enum queue_stop_reason reason
,
374 struct ieee80211_local
*local
= hw_to_local(hw
);
377 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
378 __ieee80211_stop_queue(hw
, queue
, reason
, refcounted
);
379 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
382 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
384 ieee80211_stop_queue_by_reason(hw
, queue
,
385 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
388 EXPORT_SYMBOL(ieee80211_stop_queue
);
390 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
393 struct ieee80211_hw
*hw
= &local
->hw
;
395 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
396 int queue
= info
->hw_queue
;
398 if (WARN_ON(!info
->control
.vif
)) {
399 ieee80211_free_txskb(&local
->hw
, skb
);
403 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
404 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
406 __skb_queue_tail(&local
->pending
[queue
], skb
);
407 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
409 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
412 void ieee80211_add_pending_skbs(struct ieee80211_local
*local
,
413 struct sk_buff_head
*skbs
)
415 struct ieee80211_hw
*hw
= &local
->hw
;
420 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
421 while ((skb
= skb_dequeue(skbs
))) {
422 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
424 if (WARN_ON(!info
->control
.vif
)) {
425 ieee80211_free_txskb(&local
->hw
, skb
);
429 queue
= info
->hw_queue
;
431 __ieee80211_stop_queue(hw
, queue
,
432 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
435 __skb_queue_tail(&local
->pending
[queue
], skb
);
438 for (i
= 0; i
< hw
->queues
; i
++)
439 __ieee80211_wake_queue(hw
, i
,
440 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
442 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
445 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
446 unsigned long queues
,
447 enum queue_stop_reason reason
,
450 struct ieee80211_local
*local
= hw_to_local(hw
);
454 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
456 for_each_set_bit(i
, &queues
, hw
->queues
)
457 __ieee80211_stop_queue(hw
, i
, reason
, refcounted
);
459 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
462 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
464 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
465 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
468 EXPORT_SYMBOL(ieee80211_stop_queues
);
470 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
472 struct ieee80211_local
*local
= hw_to_local(hw
);
476 if (WARN_ON(queue
>= hw
->queues
))
479 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
480 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
481 &local
->queue_stop_reasons
[queue
]);
482 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
485 EXPORT_SYMBOL(ieee80211_queue_stopped
);
487 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
488 unsigned long queues
,
489 enum queue_stop_reason reason
,
492 struct ieee80211_local
*local
= hw_to_local(hw
);
496 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
498 for_each_set_bit(i
, &queues
, hw
->queues
)
499 __ieee80211_wake_queue(hw
, i
, reason
, refcounted
);
501 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
504 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
506 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
507 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
510 EXPORT_SYMBOL(ieee80211_wake_queues
);
513 ieee80211_get_vif_queues(struct ieee80211_local
*local
,
514 struct ieee80211_sub_if_data
*sdata
)
518 if (sdata
&& ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
)) {
523 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
524 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
525 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
526 queues
|= BIT(sdata
->vif
.cab_queue
);
529 queues
= BIT(local
->hw
.queues
) - 1;
535 void __ieee80211_flush_queues(struct ieee80211_local
*local
,
536 struct ieee80211_sub_if_data
*sdata
,
537 unsigned int queues
, bool drop
)
539 if (!local
->ops
->flush
)
543 * If no queue was set, or if the HW doesn't support
544 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
546 if (!queues
|| !ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
547 queues
= ieee80211_get_vif_queues(local
, sdata
);
549 ieee80211_stop_queues_by_reason(&local
->hw
, queues
,
550 IEEE80211_QUEUE_STOP_REASON_FLUSH
,
553 drv_flush(local
, sdata
, queues
, drop
);
555 ieee80211_wake_queues_by_reason(&local
->hw
, queues
,
556 IEEE80211_QUEUE_STOP_REASON_FLUSH
,
560 void ieee80211_flush_queues(struct ieee80211_local
*local
,
561 struct ieee80211_sub_if_data
*sdata
, bool drop
)
563 __ieee80211_flush_queues(local
, sdata
, 0, drop
);
566 void ieee80211_stop_vif_queues(struct ieee80211_local
*local
,
567 struct ieee80211_sub_if_data
*sdata
,
568 enum queue_stop_reason reason
)
570 ieee80211_stop_queues_by_reason(&local
->hw
,
571 ieee80211_get_vif_queues(local
, sdata
),
575 void ieee80211_wake_vif_queues(struct ieee80211_local
*local
,
576 struct ieee80211_sub_if_data
*sdata
,
577 enum queue_stop_reason reason
)
579 ieee80211_wake_queues_by_reason(&local
->hw
,
580 ieee80211_get_vif_queues(local
, sdata
),
584 static void __iterate_interfaces(struct ieee80211_local
*local
,
586 void (*iterator
)(void *data
, u8
*mac
,
587 struct ieee80211_vif
*vif
),
590 struct ieee80211_sub_if_data
*sdata
;
591 bool active_only
= iter_flags
& IEEE80211_IFACE_ITER_ACTIVE
;
593 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
594 switch (sdata
->vif
.type
) {
595 case NL80211_IFTYPE_MONITOR
:
596 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
599 case NL80211_IFTYPE_AP_VLAN
:
604 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
605 active_only
&& !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
607 if (ieee80211_sdata_running(sdata
) || !active_only
)
608 iterator(data
, sdata
->vif
.addr
,
612 sdata
= rcu_dereference_check(local
->monitor_sdata
,
613 lockdep_is_held(&local
->iflist_mtx
) ||
614 lockdep_rtnl_is_held());
616 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
|| !active_only
||
617 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
618 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
621 void ieee80211_iterate_interfaces(
622 struct ieee80211_hw
*hw
, u32 iter_flags
,
623 void (*iterator
)(void *data
, u8
*mac
,
624 struct ieee80211_vif
*vif
),
627 struct ieee80211_local
*local
= hw_to_local(hw
);
629 mutex_lock(&local
->iflist_mtx
);
630 __iterate_interfaces(local
, iter_flags
, iterator
, data
);
631 mutex_unlock(&local
->iflist_mtx
);
633 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces
);
635 void ieee80211_iterate_active_interfaces_atomic(
636 struct ieee80211_hw
*hw
, u32 iter_flags
,
637 void (*iterator
)(void *data
, u8
*mac
,
638 struct ieee80211_vif
*vif
),
641 struct ieee80211_local
*local
= hw_to_local(hw
);
644 __iterate_interfaces(local
, iter_flags
| IEEE80211_IFACE_ITER_ACTIVE
,
648 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
650 void ieee80211_iterate_active_interfaces_rtnl(
651 struct ieee80211_hw
*hw
, u32 iter_flags
,
652 void (*iterator
)(void *data
, u8
*mac
,
653 struct ieee80211_vif
*vif
),
656 struct ieee80211_local
*local
= hw_to_local(hw
);
660 __iterate_interfaces(local
, iter_flags
| IEEE80211_IFACE_ITER_ACTIVE
,
663 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl
);
665 static void __iterate_stations(struct ieee80211_local
*local
,
666 void (*iterator
)(void *data
,
667 struct ieee80211_sta
*sta
),
670 struct sta_info
*sta
;
672 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
676 iterator(data
, &sta
->sta
);
680 void ieee80211_iterate_stations_atomic(struct ieee80211_hw
*hw
,
681 void (*iterator
)(void *data
,
682 struct ieee80211_sta
*sta
),
685 struct ieee80211_local
*local
= hw_to_local(hw
);
688 __iterate_stations(local
, iterator
, data
);
691 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic
);
693 struct ieee80211_vif
*wdev_to_ieee80211_vif(struct wireless_dev
*wdev
)
695 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
697 if (!ieee80211_sdata_running(sdata
) ||
698 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
702 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif
);
704 struct wireless_dev
*ieee80211_vif_to_wdev(struct ieee80211_vif
*vif
)
706 struct ieee80211_sub_if_data
*sdata
;
711 sdata
= vif_to_sdata(vif
);
713 if (!ieee80211_sdata_running(sdata
) ||
714 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
719 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev
);
722 * Nothing should have been stuffed into the workqueue during
723 * the suspend->resume cycle. Since we can't check each caller
724 * of this function if we are already quiescing / suspended,
725 * check here and don't WARN since this can actually happen when
726 * the rx path (for example) is racing against __ieee80211_suspend
727 * and suspending / quiescing was set after the rx path checked
730 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
732 if (local
->quiescing
|| (local
->suspended
&& !local
->resuming
)) {
733 pr_warn("queueing ieee80211 work while going to suspend\n");
740 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
742 struct ieee80211_local
*local
= hw_to_local(hw
);
744 if (!ieee80211_can_queue_work(local
))
747 queue_work(local
->workqueue
, work
);
749 EXPORT_SYMBOL(ieee80211_queue_work
);
751 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
752 struct delayed_work
*dwork
,
755 struct ieee80211_local
*local
= hw_to_local(hw
);
757 if (!ieee80211_can_queue_work(local
))
760 queue_delayed_work(local
->workqueue
, dwork
, delay
);
762 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
764 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
765 struct ieee802_11_elems
*elems
,
769 const u8
*pos
= start
;
770 bool calc_crc
= filter
!= 0;
771 DECLARE_BITMAP(seen_elems
, 256);
774 bitmap_zero(seen_elems
, 256);
775 memset(elems
, 0, sizeof(*elems
));
776 elems
->ie_start
= start
;
777 elems
->total_len
= len
;
781 bool elem_parse_failed
;
788 elems
->parse_error
= true;
794 case WLAN_EID_SUPP_RATES
:
795 case WLAN_EID_FH_PARAMS
:
796 case WLAN_EID_DS_PARAMS
:
797 case WLAN_EID_CF_PARAMS
:
799 case WLAN_EID_IBSS_PARAMS
:
800 case WLAN_EID_CHALLENGE
:
802 case WLAN_EID_ERP_INFO
:
803 case WLAN_EID_EXT_SUPP_RATES
:
804 case WLAN_EID_HT_CAPABILITY
:
805 case WLAN_EID_HT_OPERATION
:
806 case WLAN_EID_VHT_CAPABILITY
:
807 case WLAN_EID_VHT_OPERATION
:
808 case WLAN_EID_MESH_ID
:
809 case WLAN_EID_MESH_CONFIG
:
810 case WLAN_EID_PEER_MGMT
:
815 case WLAN_EID_CHANNEL_SWITCH
:
816 case WLAN_EID_EXT_CHANSWITCH_ANN
:
817 case WLAN_EID_COUNTRY
:
818 case WLAN_EID_PWR_CONSTRAINT
:
819 case WLAN_EID_TIMEOUT_INTERVAL
:
820 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
821 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
822 case WLAN_EID_CHAN_SWITCH_PARAM
:
823 case WLAN_EID_EXT_CAPABILITY
:
824 case WLAN_EID_CHAN_SWITCH_TIMING
:
825 case WLAN_EID_LINK_ID
:
827 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
828 * that if the content gets bigger it might be needed more than once
830 if (test_bit(id
, seen_elems
)) {
831 elems
->parse_error
= true;
839 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
840 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
842 elem_parse_failed
= false;
845 case WLAN_EID_LINK_ID
:
846 if (elen
+ 2 != sizeof(struct ieee80211_tdls_lnkie
)) {
847 elem_parse_failed
= true;
850 elems
->lnk_id
= (void *)(pos
- 2);
852 case WLAN_EID_CHAN_SWITCH_TIMING
:
853 if (elen
!= sizeof(struct ieee80211_ch_switch_timing
)) {
854 elem_parse_failed
= true;
857 elems
->ch_sw_timing
= (void *)pos
;
859 case WLAN_EID_EXT_CAPABILITY
:
860 elems
->ext_capab
= pos
;
861 elems
->ext_capab_len
= elen
;
865 elems
->ssid_len
= elen
;
867 case WLAN_EID_SUPP_RATES
:
868 elems
->supp_rates
= pos
;
869 elems
->supp_rates_len
= elen
;
871 case WLAN_EID_DS_PARAMS
:
873 elems
->ds_params
= pos
;
875 elem_parse_failed
= true;
878 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
879 elems
->tim
= (void *)pos
;
880 elems
->tim_len
= elen
;
882 elem_parse_failed
= true;
884 case WLAN_EID_CHALLENGE
:
885 elems
->challenge
= pos
;
886 elems
->challenge_len
= elen
;
888 case WLAN_EID_VENDOR_SPECIFIC
:
889 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
891 /* Microsoft OUI (00:50:F2) */
894 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
896 if (elen
>= 5 && pos
[3] == 2) {
897 /* OUI Type 2 - WMM IE */
899 elems
->wmm_info
= pos
;
900 elems
->wmm_info_len
= elen
;
901 } else if (pos
[4] == 1) {
902 elems
->wmm_param
= pos
;
903 elems
->wmm_param_len
= elen
;
910 elems
->rsn_len
= elen
;
912 case WLAN_EID_ERP_INFO
:
914 elems
->erp_info
= pos
;
916 elem_parse_failed
= true;
918 case WLAN_EID_EXT_SUPP_RATES
:
919 elems
->ext_supp_rates
= pos
;
920 elems
->ext_supp_rates_len
= elen
;
922 case WLAN_EID_HT_CAPABILITY
:
923 if (elen
>= sizeof(struct ieee80211_ht_cap
))
924 elems
->ht_cap_elem
= (void *)pos
;
926 elem_parse_failed
= true;
928 case WLAN_EID_HT_OPERATION
:
929 if (elen
>= sizeof(struct ieee80211_ht_operation
))
930 elems
->ht_operation
= (void *)pos
;
932 elem_parse_failed
= true;
934 case WLAN_EID_VHT_CAPABILITY
:
935 if (elen
>= sizeof(struct ieee80211_vht_cap
))
936 elems
->vht_cap_elem
= (void *)pos
;
938 elem_parse_failed
= true;
940 case WLAN_EID_VHT_OPERATION
:
941 if (elen
>= sizeof(struct ieee80211_vht_operation
))
942 elems
->vht_operation
= (void *)pos
;
944 elem_parse_failed
= true;
946 case WLAN_EID_OPMODE_NOTIF
:
948 elems
->opmode_notif
= pos
;
950 elem_parse_failed
= true;
952 case WLAN_EID_MESH_ID
:
953 elems
->mesh_id
= pos
;
954 elems
->mesh_id_len
= elen
;
956 case WLAN_EID_MESH_CONFIG
:
957 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
958 elems
->mesh_config
= (void *)pos
;
960 elem_parse_failed
= true;
962 case WLAN_EID_PEER_MGMT
:
963 elems
->peering
= pos
;
964 elems
->peering_len
= elen
;
966 case WLAN_EID_MESH_AWAKE_WINDOW
:
968 elems
->awake_window
= (void *)pos
;
972 elems
->preq_len
= elen
;
976 elems
->prep_len
= elen
;
980 elems
->perr_len
= elen
;
983 if (elen
>= sizeof(struct ieee80211_rann_ie
))
984 elems
->rann
= (void *)pos
;
986 elem_parse_failed
= true;
988 case WLAN_EID_CHANNEL_SWITCH
:
989 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
990 elem_parse_failed
= true;
993 elems
->ch_switch_ie
= (void *)pos
;
995 case WLAN_EID_EXT_CHANSWITCH_ANN
:
996 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
997 elem_parse_failed
= true;
1000 elems
->ext_chansw_ie
= (void *)pos
;
1002 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
1003 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
1004 elem_parse_failed
= true;
1007 elems
->sec_chan_offs
= (void *)pos
;
1009 case WLAN_EID_CHAN_SWITCH_PARAM
:
1011 sizeof(*elems
->mesh_chansw_params_ie
)) {
1012 elem_parse_failed
= true;
1015 elems
->mesh_chansw_params_ie
= (void *)pos
;
1017 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
1019 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
1020 elem_parse_failed
= true;
1023 elems
->wide_bw_chansw_ie
= (void *)pos
;
1025 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
1027 elem_parse_failed
= true;
1031 * This is a bit tricky, but as we only care about
1032 * the wide bandwidth channel switch element, so
1033 * just parse it out manually.
1035 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
1038 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
1039 elems
->wide_bw_chansw_ie
=
1042 elem_parse_failed
= true;
1045 case WLAN_EID_COUNTRY
:
1046 elems
->country_elem
= pos
;
1047 elems
->country_elem_len
= elen
;
1049 case WLAN_EID_PWR_CONSTRAINT
:
1051 elem_parse_failed
= true;
1054 elems
->pwr_constr_elem
= pos
;
1056 case WLAN_EID_CISCO_VENDOR_SPECIFIC
:
1057 /* Lots of different options exist, but we only care
1058 * about the Dynamic Transmit Power Control element.
1059 * First check for the Cisco OUI, then for the DTPC
1063 elem_parse_failed
= true;
1067 if (pos
[0] != 0x00 || pos
[1] != 0x40 ||
1068 pos
[2] != 0x96 || pos
[3] != 0x00)
1072 elem_parse_failed
= true;
1077 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
1079 elems
->cisco_dtpc_elem
= pos
;
1081 case WLAN_EID_TIMEOUT_INTERVAL
:
1082 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
1083 elems
->timeout_int
= (void *)pos
;
1085 elem_parse_failed
= true;
1091 if (elem_parse_failed
)
1092 elems
->parse_error
= true;
1094 __set_bit(id
, seen_elems
);
1101 elems
->parse_error
= true;
1106 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
1109 struct ieee80211_local
*local
= sdata
->local
;
1110 struct ieee80211_tx_queue_params qparam
;
1111 struct ieee80211_chanctx_conf
*chanctx_conf
;
1113 bool use_11b
, enable_qos
;
1114 bool is_ocb
; /* Use another EDCA parameters if dot11OCBActivated=true */
1117 if (!local
->ops
->conf_tx
)
1120 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1123 memset(&qparam
, 0, sizeof(qparam
));
1126 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1127 use_11b
= (chanctx_conf
&&
1128 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1129 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1133 * By default disable QoS in STA mode for old access points, which do
1134 * not support 802.11e. New APs will provide proper queue parameters,
1135 * that we will configure later.
1137 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
1139 is_ocb
= (sdata
->vif
.type
== NL80211_IFTYPE_OCB
);
1141 /* Set defaults according to 802.11-2007 Table 7-37 */
1148 /* Confiure old 802.11b/g medium access rules. */
1149 qparam
.cw_max
= aCWmax
;
1150 qparam
.cw_min
= aCWmin
;
1154 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1155 /* Update if QoS is enabled. */
1158 case IEEE80211_AC_BK
:
1159 qparam
.cw_max
= aCWmax
;
1160 qparam
.cw_min
= aCWmin
;
1167 /* never happens but let's not leave undefined */
1169 case IEEE80211_AC_BE
:
1170 qparam
.cw_max
= aCWmax
;
1171 qparam
.cw_min
= aCWmin
;
1178 case IEEE80211_AC_VI
:
1179 qparam
.cw_max
= aCWmin
;
1180 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1184 qparam
.txop
= 6016/32;
1186 qparam
.txop
= 3008/32;
1193 case IEEE80211_AC_VO
:
1194 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1195 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1199 qparam
.txop
= 3264/32;
1201 qparam
.txop
= 1504/32;
1207 qparam
.uapsd
= false;
1209 sdata
->tx_conf
[ac
] = qparam
;
1210 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1213 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1214 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1215 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1217 ieee80211_bss_info_change_notify(sdata
,
1222 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1223 u16 transaction
, u16 auth_alg
, u16 status
,
1224 const u8
*extra
, size_t extra_len
, const u8
*da
,
1225 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1228 struct ieee80211_local
*local
= sdata
->local
;
1229 struct sk_buff
*skb
;
1230 struct ieee80211_mgmt
*mgmt
;
1233 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1234 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ IEEE80211_WEP_IV_LEN
+
1235 24 + 6 + extra_len
+ IEEE80211_WEP_ICV_LEN
);
1239 skb_reserve(skb
, local
->hw
.extra_tx_headroom
+ IEEE80211_WEP_IV_LEN
);
1241 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1242 memset(mgmt
, 0, 24 + 6);
1243 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1244 IEEE80211_STYPE_AUTH
);
1245 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1246 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1247 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1248 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1249 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1250 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1252 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1254 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1255 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1256 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1260 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1262 ieee80211_tx_skb(sdata
, skb
);
1265 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1266 const u8
*bssid
, u16 stype
, u16 reason
,
1267 bool send_frame
, u8
*frame_buf
)
1269 struct ieee80211_local
*local
= sdata
->local
;
1270 struct sk_buff
*skb
;
1271 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1274 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1275 mgmt
->duration
= 0; /* initialize only */
1276 mgmt
->seq_ctrl
= 0; /* initialize only */
1277 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1278 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1279 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1280 /* u.deauth.reason_code == u.disassoc.reason_code */
1281 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1284 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1285 IEEE80211_DEAUTH_FRAME_LEN
);
1289 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1292 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1293 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1295 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1296 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1297 IEEE80211_SKB_CB(skb
)->flags
|=
1298 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1300 ieee80211_tx_skb(sdata
, skb
);
1304 static int ieee80211_build_preq_ies_band(struct ieee80211_local
*local
,
1305 u8
*buffer
, size_t buffer_len
,
1306 const u8
*ie
, size_t ie_len
,
1307 enum ieee80211_band band
,
1309 struct cfg80211_chan_def
*chandef
,
1312 struct ieee80211_supported_band
*sband
;
1313 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1315 int supp_rates_len
, i
;
1321 bool have_80mhz
= false;
1325 sband
= local
->hw
.wiphy
->bands
[band
];
1326 if (WARN_ON_ONCE(!sband
))
1329 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1330 shift
= ieee80211_chandef_get_shift(chandef
);
1333 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1334 if ((BIT(i
) & rate_mask
) == 0)
1335 continue; /* skip rate */
1336 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1339 rates
[num_rates
++] =
1340 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1344 supp_rates_len
= min_t(int, num_rates
, 8);
1346 if (end
- pos
< 2 + supp_rates_len
)
1348 *pos
++ = WLAN_EID_SUPP_RATES
;
1349 *pos
++ = supp_rates_len
;
1350 memcpy(pos
, rates
, supp_rates_len
);
1351 pos
+= supp_rates_len
;
1353 /* insert "request information" if in custom IEs */
1355 static const u8 before_extrates
[] = {
1357 WLAN_EID_SUPP_RATES
,
1360 noffset
= ieee80211_ie_split(ie
, ie_len
,
1362 ARRAY_SIZE(before_extrates
),
1364 if (end
- pos
< noffset
- *offset
)
1366 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1367 pos
+= noffset
- *offset
;
1371 ext_rates_len
= num_rates
- supp_rates_len
;
1372 if (ext_rates_len
> 0) {
1373 if (end
- pos
< 2 + ext_rates_len
)
1375 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1376 *pos
++ = ext_rates_len
;
1377 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1378 pos
+= ext_rates_len
;
1381 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1384 *pos
++ = WLAN_EID_DS_PARAMS
;
1386 *pos
++ = ieee80211_frequency_to_channel(
1387 chandef
->chan
->center_freq
);
1390 /* insert custom IEs that go before HT */
1392 static const u8 before_ht
[] = {
1394 WLAN_EID_SUPP_RATES
,
1396 WLAN_EID_EXT_SUPP_RATES
,
1398 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1400 noffset
= ieee80211_ie_split(ie
, ie_len
,
1401 before_ht
, ARRAY_SIZE(before_ht
),
1403 if (end
- pos
< noffset
- *offset
)
1405 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1406 pos
+= noffset
- *offset
;
1410 if (sband
->ht_cap
.ht_supported
) {
1411 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1413 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1418 * If adding more here, adjust code in main.c
1419 * that calculates local->scan_ies_len.
1422 /* insert custom IEs that go before VHT */
1424 static const u8 before_vht
[] = {
1426 WLAN_EID_SUPP_RATES
,
1428 WLAN_EID_EXT_SUPP_RATES
,
1430 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1431 WLAN_EID_HT_CAPABILITY
,
1432 WLAN_EID_BSS_COEX_2040
,
1433 WLAN_EID_EXT_CAPABILITY
,
1435 WLAN_EID_CHANNEL_USAGE
,
1436 WLAN_EID_INTERWORKING
,
1437 /* mesh ID can't happen here */
1438 /* 60 GHz can't happen here right now */
1440 noffset
= ieee80211_ie_split(ie
, ie_len
,
1441 before_vht
, ARRAY_SIZE(before_vht
),
1443 if (end
- pos
< noffset
- *offset
)
1445 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1446 pos
+= noffset
- *offset
;
1450 /* Check if any channel in this sband supports at least 80 MHz */
1451 for (i
= 0; i
< sband
->n_channels
; i
++) {
1452 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
1453 IEEE80211_CHAN_NO_80MHZ
))
1460 if (sband
->vht_cap
.vht_supported
&& have_80mhz
) {
1461 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1463 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1464 sband
->vht_cap
.cap
);
1467 return pos
- buffer
;
1469 WARN_ONCE(1, "not enough space for preq IEs\n");
1470 return pos
- buffer
;
1473 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1475 struct ieee80211_scan_ies
*ie_desc
,
1476 const u8
*ie
, size_t ie_len
,
1477 u8 bands_used
, u32
*rate_masks
,
1478 struct cfg80211_chan_def
*chandef
)
1480 size_t pos
= 0, old_pos
= 0, custom_ie_offset
= 0;
1483 memset(ie_desc
, 0, sizeof(*ie_desc
));
1485 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1486 if (bands_used
& BIT(i
)) {
1487 pos
+= ieee80211_build_preq_ies_band(local
,
1494 ie_desc
->ies
[i
] = buffer
+ old_pos
;
1495 ie_desc
->len
[i
] = pos
- old_pos
;
1500 /* add any remaining custom IEs */
1502 if (WARN_ONCE(buffer_len
- pos
< ie_len
- custom_ie_offset
,
1503 "not enough space for preq custom IEs\n"))
1505 memcpy(buffer
+ pos
, ie
+ custom_ie_offset
,
1506 ie_len
- custom_ie_offset
);
1507 ie_desc
->common_ies
= buffer
+ pos
;
1508 ie_desc
->common_ie_len
= ie_len
- custom_ie_offset
;
1509 pos
+= ie_len
- custom_ie_offset
;
1515 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1516 const u8
*src
, const u8
*dst
,
1518 struct ieee80211_channel
*chan
,
1519 const u8
*ssid
, size_t ssid_len
,
1520 const u8
*ie
, size_t ie_len
,
1523 struct ieee80211_local
*local
= sdata
->local
;
1524 struct cfg80211_chan_def chandef
;
1525 struct sk_buff
*skb
;
1526 struct ieee80211_mgmt
*mgmt
;
1528 u32 rate_masks
[IEEE80211_NUM_BANDS
] = {};
1529 struct ieee80211_scan_ies dummy_ie_desc
;
1532 * Do not send DS Channel parameter for directed probe requests
1533 * in order to maximize the chance that we get a response. Some
1534 * badly-behaved APs don't respond when this parameter is included.
1536 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1538 chandef
.chan
= NULL
;
1540 chandef
.chan
= chan
;
1542 skb
= ieee80211_probereq_get(&local
->hw
, src
, ssid
, ssid_len
,
1547 rate_masks
[chan
->band
] = ratemask
;
1548 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1549 skb_tailroom(skb
), &dummy_ie_desc
,
1550 ie
, ie_len
, BIT(chan
->band
),
1551 rate_masks
, &chandef
);
1552 skb_put(skb
, ies_len
);
1555 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1556 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1557 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1560 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
,
1566 const u8
*src
, const u8
*dst
,
1567 const u8
*ssid
, size_t ssid_len
,
1568 const u8
*ie
, size_t ie_len
,
1569 u32 ratemask
, bool directed
, u32 tx_flags
,
1570 struct ieee80211_channel
*channel
, bool scan
)
1572 struct sk_buff
*skb
;
1574 skb
= ieee80211_build_probe_req(sdata
, src
, dst
, ratemask
, channel
,
1576 ie
, ie_len
, directed
);
1578 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1580 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1582 ieee80211_tx_skb(sdata
, skb
);
1586 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1587 struct ieee802_11_elems
*elems
,
1588 enum ieee80211_band band
, u32
*basic_rates
)
1590 struct ieee80211_supported_band
*sband
;
1592 u32 supp_rates
, rate_flags
;
1594 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1596 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1597 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1599 if (WARN_ON(!sband
))
1602 num_rates
= sband
->n_bitrates
;
1604 for (i
= 0; i
< elems
->supp_rates_len
+
1605 elems
->ext_supp_rates_len
; i
++) {
1609 if (i
< elems
->supp_rates_len
)
1610 rate
= elems
->supp_rates
[i
];
1611 else if (elems
->ext_supp_rates
)
1612 rate
= elems
->ext_supp_rates
1613 [i
- elems
->supp_rates_len
];
1614 own_rate
= 5 * (rate
& 0x7f);
1615 is_basic
= !!(rate
& 0x80);
1617 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1620 for (j
= 0; j
< num_rates
; j
++) {
1622 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1626 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1629 if (brate
== own_rate
) {
1630 supp_rates
|= BIT(j
);
1631 if (basic_rates
&& is_basic
)
1632 *basic_rates
|= BIT(j
);
1639 void ieee80211_stop_device(struct ieee80211_local
*local
)
1641 ieee80211_led_radio(local
, false);
1642 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1644 cancel_work_sync(&local
->reconfig_filter
);
1646 flush_workqueue(local
->workqueue
);
1650 static void ieee80211_handle_reconfig_failure(struct ieee80211_local
*local
)
1652 struct ieee80211_sub_if_data
*sdata
;
1653 struct ieee80211_chanctx
*ctx
;
1656 * We get here if during resume the device can't be restarted properly.
1657 * We might also get here if this happens during HW reset, which is a
1658 * slightly different situation and we need to drop all connections in
1661 * Ask cfg80211 to turn off all interfaces, this will result in more
1662 * warnings but at least we'll then get into a clean stopped state.
1665 local
->resuming
= false;
1666 local
->suspended
= false;
1667 local
->started
= false;
1668 local
->in_reconfig
= false;
1670 /* scheduled scan clearly can't be running any more, but tell
1671 * cfg80211 and clear local state
1673 ieee80211_sched_scan_end(local
);
1675 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1676 sdata
->flags
&= ~IEEE80211_SDATA_IN_DRIVER
;
1678 /* Mark channel contexts as not being in the driver any more to avoid
1679 * removing them from the driver during the shutdown process...
1681 mutex_lock(&local
->chanctx_mtx
);
1682 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1683 ctx
->driver_present
= false;
1684 mutex_unlock(&local
->chanctx_mtx
);
1686 cfg80211_shutdown_all_interfaces(local
->hw
.wiphy
);
1689 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1690 struct ieee80211_sub_if_data
*sdata
)
1692 struct ieee80211_chanctx_conf
*conf
;
1693 struct ieee80211_chanctx
*ctx
;
1695 if (!local
->use_chanctx
)
1698 mutex_lock(&local
->chanctx_mtx
);
1699 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1700 lockdep_is_held(&local
->chanctx_mtx
));
1702 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1703 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1705 mutex_unlock(&local
->chanctx_mtx
);
1708 int ieee80211_reconfig(struct ieee80211_local
*local
)
1710 struct ieee80211_hw
*hw
= &local
->hw
;
1711 struct ieee80211_sub_if_data
*sdata
;
1712 struct ieee80211_chanctx
*ctx
;
1713 struct sta_info
*sta
;
1715 bool reconfig_due_to_wowlan
= false;
1716 struct ieee80211_sub_if_data
*sched_scan_sdata
;
1717 struct cfg80211_sched_scan_request
*sched_scan_req
;
1718 bool sched_scan_stopped
= false;
1719 bool suspended
= local
->suspended
;
1721 /* nothing to do if HW shouldn't run */
1722 if (!local
->open_count
)
1727 local
->resuming
= true;
1729 if (local
->wowlan
) {
1731 * In the wowlan case, both mac80211 and the device
1732 * are functional when the resume op is called, so
1733 * clear local->suspended so the device could operate
1734 * normally (e.g. pass rx frames).
1736 local
->suspended
= false;
1737 res
= drv_resume(local
);
1738 local
->wowlan
= false;
1740 local
->resuming
= false;
1747 * res is 1, which means the driver requested
1748 * to go through a regular reset on wakeup.
1749 * restore local->suspended in this case.
1751 reconfig_due_to_wowlan
= true;
1752 local
->suspended
= true;
1757 * Upon resume hardware can sometimes be goofy due to
1758 * various platform / driver / bus issues, so restarting
1759 * the device may at times not work immediately. Propagate
1762 res
= drv_start(local
);
1765 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1767 WARN(1, "Hardware became unavailable during restart.\n");
1768 ieee80211_handle_reconfig_failure(local
);
1772 /* setup fragmentation threshold */
1773 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1775 /* setup RTS threshold */
1776 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1778 /* reset coverage class */
1779 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1781 ieee80211_led_radio(local
, true);
1782 ieee80211_mod_tpt_led_trig(local
,
1783 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1785 /* add interfaces */
1786 sdata
= rtnl_dereference(local
->monitor_sdata
);
1788 /* in HW restart it exists already */
1789 WARN_ON(local
->resuming
);
1790 res
= drv_add_interface(local
, sdata
);
1792 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
1798 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1799 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1800 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1801 ieee80211_sdata_running(sdata
)) {
1802 res
= drv_add_interface(local
, sdata
);
1808 /* If adding any of the interfaces failed above, roll back and
1812 list_for_each_entry_continue_reverse(sdata
, &local
->interfaces
,
1814 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1815 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1816 ieee80211_sdata_running(sdata
))
1817 drv_remove_interface(local
, sdata
);
1818 ieee80211_handle_reconfig_failure(local
);
1822 /* add channel contexts */
1823 if (local
->use_chanctx
) {
1824 mutex_lock(&local
->chanctx_mtx
);
1825 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1826 if (ctx
->replace_state
!=
1827 IEEE80211_CHANCTX_REPLACES_OTHER
)
1828 WARN_ON(drv_add_chanctx(local
, ctx
));
1829 mutex_unlock(&local
->chanctx_mtx
);
1831 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1832 if (!ieee80211_sdata_running(sdata
))
1834 ieee80211_assign_chanctx(local
, sdata
);
1837 sdata
= rtnl_dereference(local
->monitor_sdata
);
1838 if (sdata
&& ieee80211_sdata_running(sdata
))
1839 ieee80211_assign_chanctx(local
, sdata
);
1843 mutex_lock(&local
->sta_mtx
);
1844 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1845 enum ieee80211_sta_state state
;
1850 /* AP-mode stations will be added later */
1851 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1854 for (state
= IEEE80211_STA_NOTEXIST
;
1855 state
< sta
->sta_state
; state
++)
1856 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1859 mutex_unlock(&local
->sta_mtx
);
1861 /* reconfigure tx conf */
1862 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1863 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1864 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1865 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1866 !ieee80211_sdata_running(sdata
))
1869 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1870 drv_conf_tx(local
, sdata
, i
,
1871 &sdata
->tx_conf
[i
]);
1875 /* reconfigure hardware */
1876 ieee80211_hw_config(local
, ~0);
1878 ieee80211_configure_filter(local
);
1880 /* Finally also reconfigure all the BSS information */
1881 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1884 if (!ieee80211_sdata_running(sdata
))
1887 /* common change flags for all interface types */
1888 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1889 BSS_CHANGED_ERP_PREAMBLE
|
1890 BSS_CHANGED_ERP_SLOT
|
1892 BSS_CHANGED_BASIC_RATES
|
1893 BSS_CHANGED_BEACON_INT
|
1898 BSS_CHANGED_TXPOWER
;
1900 switch (sdata
->vif
.type
) {
1901 case NL80211_IFTYPE_STATION
:
1902 changed
|= BSS_CHANGED_ASSOC
|
1903 BSS_CHANGED_ARP_FILTER
|
1906 /* Re-send beacon info report to the driver */
1907 if (sdata
->u
.mgd
.have_beacon
)
1908 changed
|= BSS_CHANGED_BEACON_INFO
;
1911 ieee80211_bss_info_change_notify(sdata
, changed
);
1912 sdata_unlock(sdata
);
1914 case NL80211_IFTYPE_OCB
:
1915 changed
|= BSS_CHANGED_OCB
;
1916 ieee80211_bss_info_change_notify(sdata
, changed
);
1918 case NL80211_IFTYPE_ADHOC
:
1919 changed
|= BSS_CHANGED_IBSS
;
1921 case NL80211_IFTYPE_AP
:
1922 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1924 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1925 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1927 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1928 drv_start_ap(local
, sdata
);
1932 case NL80211_IFTYPE_MESH_POINT
:
1933 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1934 changed
|= BSS_CHANGED_BEACON
|
1935 BSS_CHANGED_BEACON_ENABLED
;
1936 ieee80211_bss_info_change_notify(sdata
, changed
);
1939 case NL80211_IFTYPE_WDS
:
1940 case NL80211_IFTYPE_AP_VLAN
:
1941 case NL80211_IFTYPE_MONITOR
:
1942 case NL80211_IFTYPE_P2P_DEVICE
:
1945 case NL80211_IFTYPE_UNSPECIFIED
:
1946 case NUM_NL80211_IFTYPES
:
1947 case NL80211_IFTYPE_P2P_CLIENT
:
1948 case NL80211_IFTYPE_P2P_GO
:
1954 ieee80211_recalc_ps(local
);
1957 * The sta might be in psm against the ap (e.g. because
1958 * this was the state before a hw restart), so we
1959 * explicitly send a null packet in order to make sure
1960 * it'll sync against the ap (and get out of psm).
1962 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1963 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1964 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1966 if (!sdata
->u
.mgd
.associated
)
1969 ieee80211_send_nullfunc(local
, sdata
, false);
1973 /* APs are now beaconing, add back stations */
1974 mutex_lock(&local
->sta_mtx
);
1975 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1976 enum ieee80211_sta_state state
;
1981 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1984 for (state
= IEEE80211_STA_NOTEXIST
;
1985 state
< sta
->sta_state
; state
++)
1986 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1989 mutex_unlock(&local
->sta_mtx
);
1992 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1993 ieee80211_reset_crypto_tx_tailroom(sdata
);
1995 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1996 if (ieee80211_sdata_running(sdata
))
1997 ieee80211_enable_keys(sdata
);
2000 local
->in_reconfig
= false;
2003 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
2004 ieee80211_add_virtual_monitor(local
);
2007 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2008 * sessions can be established after a resume.
2010 * Also tear down aggregation sessions since reconfiguring
2011 * them in a hardware restart scenario is not easily done
2012 * right now, and the hardware will have lost information
2013 * about the sessions, but we and the AP still think they
2014 * are active. This is really a workaround though.
2016 if (ieee80211_hw_check(hw
, AMPDU_AGGREGATION
)) {
2017 mutex_lock(&local
->sta_mtx
);
2019 list_for_each_entry(sta
, &local
->sta_list
, list
) {
2020 if (!local
->resuming
)
2021 ieee80211_sta_tear_down_BA_sessions(
2022 sta
, AGG_STOP_LOCAL_REQUEST
);
2023 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
2026 mutex_unlock(&local
->sta_mtx
);
2029 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
2030 IEEE80211_QUEUE_STOP_REASON_SUSPEND
,
2034 * Reconfigure sched scan if it was interrupted by FW restart or
2037 mutex_lock(&local
->mtx
);
2038 sched_scan_sdata
= rcu_dereference_protected(local
->sched_scan_sdata
,
2039 lockdep_is_held(&local
->mtx
));
2040 sched_scan_req
= rcu_dereference_protected(local
->sched_scan_req
,
2041 lockdep_is_held(&local
->mtx
));
2042 if (sched_scan_sdata
&& sched_scan_req
)
2044 * Sched scan stopped, but we don't want to report it. Instead,
2045 * we're trying to reschedule. However, if more than one scan
2046 * plan was set, we cannot reschedule since we don't know which
2047 * scan plan was currently running (and some scan plans may have
2048 * already finished).
2050 if (sched_scan_req
->n_scan_plans
> 1 ||
2051 __ieee80211_request_sched_scan_start(sched_scan_sdata
,
2053 sched_scan_stopped
= true;
2054 mutex_unlock(&local
->mtx
);
2056 if (sched_scan_stopped
)
2057 cfg80211_sched_scan_stopped_rtnl(local
->hw
.wiphy
);
2060 * If this is for hw restart things are still running.
2061 * We may want to change that later, however.
2063 if (local
->open_count
&& (!suspended
|| reconfig_due_to_wowlan
))
2064 drv_reconfig_complete(local
, IEEE80211_RECONFIG_TYPE_RESTART
);
2070 /* first set suspended false, then resuming */
2071 local
->suspended
= false;
2073 local
->resuming
= false;
2075 /* It's possible that we don't handle the scan completion in
2076 * time during suspend, so if it's still marked as completed
2077 * here, queue the work and flush it to clean things up.
2078 * Instead of calling the worker function directly here, we
2079 * really queue it to avoid potential races with other flows
2080 * scheduling the same work.
2082 if (test_bit(SCAN_COMPLETED
, &local
->scanning
)) {
2083 ieee80211_queue_delayed_work(&local
->hw
, &local
->scan_work
, 0);
2084 flush_delayed_work(&local
->scan_work
);
2087 if (local
->open_count
&& !reconfig_due_to_wowlan
)
2088 drv_reconfig_complete(local
, IEEE80211_RECONFIG_TYPE_SUSPEND
);
2090 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2091 if (!ieee80211_sdata_running(sdata
))
2093 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2094 ieee80211_sta_restart(sdata
);
2097 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
2105 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
2107 struct ieee80211_sub_if_data
*sdata
;
2108 struct ieee80211_local
*local
;
2109 struct ieee80211_key
*key
;
2114 sdata
= vif_to_sdata(vif
);
2115 local
= sdata
->local
;
2117 if (WARN_ON(!local
->resuming
))
2120 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2123 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
2125 mutex_lock(&local
->key_mtx
);
2126 list_for_each_entry(key
, &sdata
->key_list
, list
)
2127 key
->flags
|= KEY_FLAG_TAINTED
;
2128 mutex_unlock(&local
->key_mtx
);
2130 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
2132 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
2134 struct ieee80211_local
*local
= sdata
->local
;
2135 struct ieee80211_chanctx_conf
*chanctx_conf
;
2136 struct ieee80211_chanctx
*chanctx
;
2138 mutex_lock(&local
->chanctx_mtx
);
2140 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
2141 lockdep_is_held(&local
->chanctx_mtx
));
2143 if (WARN_ON_ONCE(!chanctx_conf
))
2146 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
2147 ieee80211_recalc_smps_chanctx(local
, chanctx
);
2149 mutex_unlock(&local
->chanctx_mtx
);
2152 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data
*sdata
)
2154 struct ieee80211_local
*local
= sdata
->local
;
2155 struct ieee80211_chanctx_conf
*chanctx_conf
;
2156 struct ieee80211_chanctx
*chanctx
;
2158 mutex_lock(&local
->chanctx_mtx
);
2160 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
2161 lockdep_is_held(&local
->chanctx_mtx
));
2163 if (WARN_ON_ONCE(!chanctx_conf
))
2166 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
2167 ieee80211_recalc_chanctx_min_def(local
, chanctx
);
2169 mutex_unlock(&local
->chanctx_mtx
);
2172 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
2174 size_t pos
= offset
;
2176 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
2177 pos
+= 2 + ies
[pos
+ 1];
2182 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
2186 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
2188 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2192 * Scale up threshold values before storing it, as the RSSI averaging
2193 * algorithm uses a scaled up value as well. Change this scaling
2194 * factor if the RSSI averaging algorithm changes.
2196 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
2197 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
2200 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
2204 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2206 WARN_ON(rssi_min_thold
== rssi_max_thold
||
2207 rssi_min_thold
> rssi_max_thold
);
2209 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
2212 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
2214 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
2216 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2218 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
2220 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
2222 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2227 *pos
++ = WLAN_EID_HT_CAPABILITY
;
2228 *pos
++ = sizeof(struct ieee80211_ht_cap
);
2229 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
2231 /* capability flags */
2232 tmp
= cpu_to_le16(cap
);
2233 memcpy(pos
, &tmp
, sizeof(u16
));
2236 /* AMPDU parameters */
2237 *pos
++ = ht_cap
->ampdu_factor
|
2238 (ht_cap
->ampdu_density
<<
2239 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
2242 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
2243 pos
+= sizeof(ht_cap
->mcs
);
2245 /* extended capabilities */
2246 pos
+= sizeof(__le16
);
2248 /* BF capabilities */
2249 pos
+= sizeof(__le32
);
2251 /* antenna selection */
2257 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
2262 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
2263 *pos
++ = sizeof(struct ieee80211_vht_cap
);
2264 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
2266 /* capability flags */
2267 tmp
= cpu_to_le32(cap
);
2268 memcpy(pos
, &tmp
, sizeof(u32
));
2272 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
2273 pos
+= sizeof(vht_cap
->vht_mcs
);
2278 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2279 const struct cfg80211_chan_def
*chandef
,
2282 struct ieee80211_ht_operation
*ht_oper
;
2283 /* Build HT Information */
2284 *pos
++ = WLAN_EID_HT_OPERATION
;
2285 *pos
++ = sizeof(struct ieee80211_ht_operation
);
2286 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
2287 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
2288 chandef
->chan
->center_freq
);
2289 switch (chandef
->width
) {
2290 case NL80211_CHAN_WIDTH_160
:
2291 case NL80211_CHAN_WIDTH_80P80
:
2292 case NL80211_CHAN_WIDTH_80
:
2293 case NL80211_CHAN_WIDTH_40
:
2294 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
2295 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2297 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2300 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
2303 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
2304 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
2305 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
2306 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
2308 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
2309 ht_oper
->stbc_param
= 0x0000;
2311 /* It seems that Basic MCS set and Supported MCS set
2312 are identical for the first 10 bytes */
2313 memset(&ht_oper
->basic_set
, 0, 16);
2314 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
2316 return pos
+ sizeof(struct ieee80211_ht_operation
);
2319 u8
*ieee80211_ie_build_vht_oper(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
2320 const struct cfg80211_chan_def
*chandef
)
2322 struct ieee80211_vht_operation
*vht_oper
;
2324 *pos
++ = WLAN_EID_VHT_OPERATION
;
2325 *pos
++ = sizeof(struct ieee80211_vht_operation
);
2326 vht_oper
= (struct ieee80211_vht_operation
*)pos
;
2327 vht_oper
->center_freq_seg1_idx
= ieee80211_frequency_to_channel(
2328 chandef
->center_freq1
);
2329 if (chandef
->center_freq2
)
2330 vht_oper
->center_freq_seg2_idx
=
2331 ieee80211_frequency_to_channel(chandef
->center_freq2
);
2333 vht_oper
->center_freq_seg2_idx
= 0x00;
2335 switch (chandef
->width
) {
2336 case NL80211_CHAN_WIDTH_160
:
2337 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_160MHZ
;
2339 case NL80211_CHAN_WIDTH_80P80
:
2340 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_80P80MHZ
;
2342 case NL80211_CHAN_WIDTH_80
:
2343 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_80MHZ
;
2346 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_USE_HT
;
2350 /* don't require special VHT peer rates */
2351 vht_oper
->basic_mcs_set
= cpu_to_le16(0xffff);
2353 return pos
+ sizeof(struct ieee80211_vht_operation
);
2356 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2357 const struct ieee80211_ht_operation
*ht_oper
,
2358 struct cfg80211_chan_def
*chandef
)
2360 enum nl80211_channel_type channel_type
;
2363 cfg80211_chandef_create(chandef
, control_chan
,
2364 NL80211_CHAN_NO_HT
);
2368 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2369 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2370 channel_type
= NL80211_CHAN_HT20
;
2372 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2373 channel_type
= NL80211_CHAN_HT40PLUS
;
2375 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2376 channel_type
= NL80211_CHAN_HT40MINUS
;
2379 channel_type
= NL80211_CHAN_NO_HT
;
2382 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2385 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2386 const struct ieee80211_vht_operation
*oper
,
2387 struct cfg80211_chan_def
*chandef
)
2392 chandef
->chan
= control_chan
;
2394 switch (oper
->chan_width
) {
2395 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
2397 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
2398 chandef
->width
= NL80211_CHAN_WIDTH_80
;
2400 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
2401 chandef
->width
= NL80211_CHAN_WIDTH_160
;
2403 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
2404 chandef
->width
= NL80211_CHAN_WIDTH_80P80
;
2410 chandef
->center_freq1
=
2411 ieee80211_channel_to_frequency(oper
->center_freq_seg1_idx
,
2412 control_chan
->band
);
2413 chandef
->center_freq2
=
2414 ieee80211_channel_to_frequency(oper
->center_freq_seg2_idx
,
2415 control_chan
->band
);
2418 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2419 const struct ieee80211_supported_band
*sband
,
2420 const u8
*srates
, int srates_len
, u32
*rates
)
2422 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2423 int shift
= ieee80211_chandef_get_shift(chandef
);
2424 struct ieee80211_rate
*br
;
2425 int brate
, rate
, i
, j
, count
= 0;
2429 for (i
= 0; i
< srates_len
; i
++) {
2430 rate
= srates
[i
] & 0x7f;
2432 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2433 br
= &sband
->bitrates
[j
];
2434 if ((rate_flags
& br
->flags
) != rate_flags
)
2437 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2438 if (brate
== rate
) {
2448 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2449 struct sk_buff
*skb
, bool need_basic
,
2450 enum ieee80211_band band
)
2452 struct ieee80211_local
*local
= sdata
->local
;
2453 struct ieee80211_supported_band
*sband
;
2456 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2459 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2460 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2461 sband
= local
->hw
.wiphy
->bands
[band
];
2463 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2464 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2471 if (skb_tailroom(skb
) < rates
+ 2)
2474 pos
= skb_put(skb
, rates
+ 2);
2475 *pos
++ = WLAN_EID_SUPP_RATES
;
2477 for (i
= 0; i
< rates
; i
++) {
2479 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2482 if (need_basic
&& basic_rates
& BIT(i
))
2484 rate
= sband
->bitrates
[i
].bitrate
;
2485 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2487 *pos
++ = basic
| (u8
) rate
;
2493 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2494 struct sk_buff
*skb
, bool need_basic
,
2495 enum ieee80211_band band
)
2497 struct ieee80211_local
*local
= sdata
->local
;
2498 struct ieee80211_supported_band
*sband
;
2500 u8 i
, exrates
, *pos
;
2501 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2504 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2505 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2507 sband
= local
->hw
.wiphy
->bands
[band
];
2509 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2510 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2520 if (skb_tailroom(skb
) < exrates
+ 2)
2524 pos
= skb_put(skb
, exrates
+ 2);
2525 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2527 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2529 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2532 if (need_basic
&& basic_rates
& BIT(i
))
2534 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2536 *pos
++ = basic
| (u8
) rate
;
2542 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2544 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2545 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2547 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2548 /* non-managed type inferfaces */
2551 return -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
2553 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2555 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2560 /* TODO: consider rx_highest */
2562 if (mcs
->rx_mask
[3])
2564 if (mcs
->rx_mask
[2])
2566 if (mcs
->rx_mask
[1])
2572 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2573 * @local: mac80211 hw info struct
2574 * @status: RX status
2575 * @mpdu_len: total MPDU length (including FCS)
2576 * @mpdu_offset: offset into MPDU to calculate timestamp at
2578 * This function calculates the RX timestamp at the given MPDU offset, taking
2579 * into account what the RX timestamp was. An offset of 0 will just normalize
2580 * the timestamp to TSF at beginning of MPDU reception.
2582 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2583 struct ieee80211_rx_status
*status
,
2584 unsigned int mpdu_len
,
2585 unsigned int mpdu_offset
)
2587 u64 ts
= status
->mactime
;
2588 struct rate_info ri
;
2591 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2594 memset(&ri
, 0, sizeof(ri
));
2596 /* Fill cfg80211 rate info */
2597 if (status
->flag
& RX_FLAG_HT
) {
2598 ri
.mcs
= status
->rate_idx
;
2599 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2600 if (status
->flag
& RX_FLAG_40MHZ
)
2601 ri
.bw
= RATE_INFO_BW_40
;
2603 ri
.bw
= RATE_INFO_BW_20
;
2604 if (status
->flag
& RX_FLAG_SHORT_GI
)
2605 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2606 } else if (status
->flag
& RX_FLAG_VHT
) {
2607 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2608 ri
.mcs
= status
->rate_idx
;
2609 ri
.nss
= status
->vht_nss
;
2610 if (status
->flag
& RX_FLAG_40MHZ
)
2611 ri
.bw
= RATE_INFO_BW_40
;
2612 else if (status
->vht_flag
& RX_VHT_FLAG_80MHZ
)
2613 ri
.bw
= RATE_INFO_BW_80
;
2614 else if (status
->vht_flag
& RX_VHT_FLAG_160MHZ
)
2615 ri
.bw
= RATE_INFO_BW_160
;
2617 ri
.bw
= RATE_INFO_BW_20
;
2618 if (status
->flag
& RX_FLAG_SHORT_GI
)
2619 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2621 struct ieee80211_supported_band
*sband
;
2625 if (status
->flag
& RX_FLAG_10MHZ
) {
2627 ri
.bw
= RATE_INFO_BW_10
;
2628 } else if (status
->flag
& RX_FLAG_5MHZ
) {
2630 ri
.bw
= RATE_INFO_BW_5
;
2632 ri
.bw
= RATE_INFO_BW_20
;
2635 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2636 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2637 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2640 rate
= cfg80211_calculate_bitrate(&ri
);
2641 if (WARN_ONCE(!rate
,
2642 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2643 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2646 /* rewind from end of MPDU */
2647 if (status
->flag
& RX_FLAG_MACTIME_END
)
2648 ts
-= mpdu_len
* 8 * 10 / rate
;
2650 ts
+= mpdu_offset
* 8 * 10 / rate
;
2655 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2657 struct ieee80211_sub_if_data
*sdata
;
2658 struct cfg80211_chan_def chandef
;
2660 mutex_lock(&local
->mtx
);
2661 mutex_lock(&local
->iflist_mtx
);
2662 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2663 /* it might be waiting for the local->mtx, but then
2664 * by the time it gets it, sdata->wdev.cac_started
2665 * will no longer be true
2667 cancel_delayed_work(&sdata
->dfs_cac_timer_work
);
2669 if (sdata
->wdev
.cac_started
) {
2670 chandef
= sdata
->vif
.bss_conf
.chandef
;
2671 ieee80211_vif_release_channel(sdata
);
2672 cfg80211_cac_event(sdata
->dev
,
2674 NL80211_RADAR_CAC_ABORTED
,
2678 mutex_unlock(&local
->iflist_mtx
);
2679 mutex_unlock(&local
->mtx
);
2682 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2684 struct ieee80211_local
*local
=
2685 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2686 struct cfg80211_chan_def chandef
= local
->hw
.conf
.chandef
;
2687 struct ieee80211_chanctx
*ctx
;
2688 int num_chanctx
= 0;
2690 mutex_lock(&local
->chanctx_mtx
);
2691 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
2692 if (ctx
->replace_state
== IEEE80211_CHANCTX_REPLACES_OTHER
)
2696 chandef
= ctx
->conf
.def
;
2698 mutex_unlock(&local
->chanctx_mtx
);
2700 ieee80211_dfs_cac_cancel(local
);
2702 if (num_chanctx
> 1)
2703 /* XXX: multi-channel is not supported yet */
2706 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2709 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2711 struct ieee80211_local
*local
= hw_to_local(hw
);
2713 trace_api_radar_detected(local
);
2715 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2717 EXPORT_SYMBOL(ieee80211_radar_detected
);
2719 u32
ieee80211_chandef_downgrade(struct cfg80211_chan_def
*c
)
2725 case NL80211_CHAN_WIDTH_20
:
2726 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2727 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2729 case NL80211_CHAN_WIDTH_40
:
2730 c
->width
= NL80211_CHAN_WIDTH_20
;
2731 c
->center_freq1
= c
->chan
->center_freq
;
2732 ret
= IEEE80211_STA_DISABLE_40MHZ
|
2733 IEEE80211_STA_DISABLE_VHT
;
2735 case NL80211_CHAN_WIDTH_80
:
2736 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2740 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
2741 c
->width
= NL80211_CHAN_WIDTH_40
;
2742 ret
= IEEE80211_STA_DISABLE_VHT
;
2744 case NL80211_CHAN_WIDTH_80P80
:
2745 c
->center_freq2
= 0;
2746 c
->width
= NL80211_CHAN_WIDTH_80
;
2747 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2748 IEEE80211_STA_DISABLE_160MHZ
;
2750 case NL80211_CHAN_WIDTH_160
:
2752 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2755 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
2756 c
->width
= NL80211_CHAN_WIDTH_80
;
2757 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2758 IEEE80211_STA_DISABLE_160MHZ
;
2761 case NL80211_CHAN_WIDTH_20_NOHT
:
2763 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2764 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2766 case NL80211_CHAN_WIDTH_5
:
2767 case NL80211_CHAN_WIDTH_10
:
2770 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2774 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
2780 * Returns true if smps_mode_new is strictly more restrictive than
2783 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old
,
2784 enum ieee80211_smps_mode smps_mode_new
)
2786 if (WARN_ON_ONCE(smps_mode_old
== IEEE80211_SMPS_AUTOMATIC
||
2787 smps_mode_new
== IEEE80211_SMPS_AUTOMATIC
))
2790 switch (smps_mode_old
) {
2791 case IEEE80211_SMPS_STATIC
:
2793 case IEEE80211_SMPS_DYNAMIC
:
2794 return smps_mode_new
== IEEE80211_SMPS_STATIC
;
2795 case IEEE80211_SMPS_OFF
:
2796 return smps_mode_new
!= IEEE80211_SMPS_OFF
;
2804 int ieee80211_send_action_csa(struct ieee80211_sub_if_data
*sdata
,
2805 struct cfg80211_csa_settings
*csa_settings
)
2807 struct sk_buff
*skb
;
2808 struct ieee80211_mgmt
*mgmt
;
2809 struct ieee80211_local
*local
= sdata
->local
;
2811 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.chan_switch
) +
2812 sizeof(mgmt
->u
.action
.u
.chan_switch
);
2815 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2816 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2819 skb
= dev_alloc_skb(local
->tx_headroom
+ hdr_len
+
2820 5 + /* channel switch announcement element */
2821 3 + /* secondary channel offset element */
2822 8); /* mesh channel switch parameters element */
2826 skb_reserve(skb
, local
->tx_headroom
);
2827 mgmt
= (struct ieee80211_mgmt
*)skb_put(skb
, hdr_len
);
2828 memset(mgmt
, 0, hdr_len
);
2829 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2830 IEEE80211_STYPE_ACTION
);
2832 eth_broadcast_addr(mgmt
->da
);
2833 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2834 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2835 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2837 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2838 memcpy(mgmt
->bssid
, ifibss
->bssid
, ETH_ALEN
);
2840 mgmt
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
2841 mgmt
->u
.action
.u
.chan_switch
.action_code
= WLAN_ACTION_SPCT_CHL_SWITCH
;
2842 pos
= skb_put(skb
, 5);
2843 *pos
++ = WLAN_EID_CHANNEL_SWITCH
; /* EID */
2844 *pos
++ = 3; /* IE length */
2845 *pos
++ = csa_settings
->block_tx
? 1 : 0; /* CSA mode */
2846 freq
= csa_settings
->chandef
.chan
->center_freq
;
2847 *pos
++ = ieee80211_frequency_to_channel(freq
); /* channel */
2848 *pos
++ = csa_settings
->count
; /* count */
2850 if (csa_settings
->chandef
.width
== NL80211_CHAN_WIDTH_40
) {
2851 enum nl80211_channel_type ch_type
;
2854 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
2855 *pos
++ = 1; /* IE length */
2856 ch_type
= cfg80211_get_chandef_type(&csa_settings
->chandef
);
2857 if (ch_type
== NL80211_CHAN_HT40PLUS
)
2858 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2860 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2863 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2864 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2867 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
; /* EID */
2868 *pos
++ = 6; /* IE length */
2869 *pos
++ = sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
; /* Mesh TTL */
2870 *pos
= 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2871 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
2872 *pos
++ |= csa_settings
->block_tx
?
2873 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
2874 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
); /* Reason Cd */
2876 put_unaligned_le16(ifmsh
->pre_value
, pos
);/* Precedence Value */
2880 ieee80211_tx_skb(sdata
, skb
);
2884 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme
*cs
)
2886 return !(cs
== NULL
|| cs
->cipher
== 0 ||
2887 cs
->hdr_len
< cs
->pn_len
+ cs
->pn_off
||
2888 cs
->hdr_len
<= cs
->key_idx_off
||
2889 cs
->key_idx_shift
> 7 ||
2890 cs
->key_idx_mask
== 0);
2893 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme
*cs
, int n
)
2897 /* Ensure we have enough iftype bitmap space for all iftype values */
2898 WARN_ON((NUM_NL80211_IFTYPES
/ 8 + 1) > sizeof(cs
[0].iftype
));
2900 for (i
= 0; i
< n
; i
++)
2901 if (!ieee80211_cs_valid(&cs
[i
]))
2907 const struct ieee80211_cipher_scheme
*
2908 ieee80211_cs_get(struct ieee80211_local
*local
, u32 cipher
,
2909 enum nl80211_iftype iftype
)
2911 const struct ieee80211_cipher_scheme
*l
= local
->hw
.cipher_schemes
;
2912 int n
= local
->hw
.n_cipher_schemes
;
2914 const struct ieee80211_cipher_scheme
*cs
= NULL
;
2916 for (i
= 0; i
< n
; i
++) {
2917 if (l
[i
].cipher
== cipher
) {
2923 if (!cs
|| !(cs
->iftype
& BIT(iftype
)))
2929 int ieee80211_cs_headroom(struct ieee80211_local
*local
,
2930 struct cfg80211_crypto_settings
*crypto
,
2931 enum nl80211_iftype iftype
)
2933 const struct ieee80211_cipher_scheme
*cs
;
2934 int headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2937 for (i
= 0; i
< crypto
->n_ciphers_pairwise
; i
++) {
2938 cs
= ieee80211_cs_get(local
, crypto
->ciphers_pairwise
[i
],
2941 if (cs
&& headroom
< cs
->hdr_len
)
2942 headroom
= cs
->hdr_len
;
2945 cs
= ieee80211_cs_get(local
, crypto
->cipher_group
, iftype
);
2946 if (cs
&& headroom
< cs
->hdr_len
)
2947 headroom
= cs
->hdr_len
;
2953 ieee80211_extend_noa_desc(struct ieee80211_noa_data
*data
, u32 tsf
, int i
)
2955 s32 end
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- (tsf
+ 1);
2962 if (data
->count
[i
] == 1)
2965 if (data
->desc
[i
].interval
== 0)
2968 /* End time is in the past, check for repetitions */
2969 skip
= DIV_ROUND_UP(-end
, data
->desc
[i
].interval
);
2970 if (data
->count
[i
] < 255) {
2971 if (data
->count
[i
] <= skip
) {
2976 data
->count
[i
] -= skip
;
2979 data
->desc
[i
].start
+= skip
* data
->desc
[i
].interval
;
2985 ieee80211_extend_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
,
2991 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2994 if (!data
->count
[i
])
2997 if (ieee80211_extend_noa_desc(data
, tsf
+ *offset
, i
))
3000 cur
= data
->desc
[i
].start
- tsf
;
3004 cur
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- tsf
;
3013 ieee80211_get_noa_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
)
3018 * arbitrary limit, used to avoid infinite loops when combined NoA
3019 * descriptors cover the full time period.
3023 ieee80211_extend_absent_time(data
, tsf
, &offset
);
3025 if (!ieee80211_extend_absent_time(data
, tsf
, &offset
))
3029 } while (tries
< max_tries
);
3034 void ieee80211_update_p2p_noa(struct ieee80211_noa_data
*data
, u32 tsf
)
3036 u32 next_offset
= BIT(31) - 1;
3040 data
->has_next_tsf
= false;
3041 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
3044 if (!data
->count
[i
])
3047 ieee80211_extend_noa_desc(data
, tsf
, i
);
3048 start
= data
->desc
[i
].start
- tsf
;
3050 data
->absent
|= BIT(i
);
3052 if (next_offset
> start
)
3053 next_offset
= start
;
3055 data
->has_next_tsf
= true;
3059 next_offset
= ieee80211_get_noa_absent_time(data
, tsf
);
3061 data
->next_tsf
= tsf
+ next_offset
;
3063 EXPORT_SYMBOL(ieee80211_update_p2p_noa
);
3065 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr
*attr
,
3066 struct ieee80211_noa_data
*data
, u32 tsf
)
3071 memset(data
, 0, sizeof(*data
));
3073 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
3074 const struct ieee80211_p2p_noa_desc
*desc
= &attr
->desc
[i
];
3076 if (!desc
->count
|| !desc
->duration
)
3079 data
->count
[i
] = desc
->count
;
3080 data
->desc
[i
].start
= le32_to_cpu(desc
->start_time
);
3081 data
->desc
[i
].duration
= le32_to_cpu(desc
->duration
);
3082 data
->desc
[i
].interval
= le32_to_cpu(desc
->interval
);
3084 if (data
->count
[i
] > 1 &&
3085 data
->desc
[i
].interval
< data
->desc
[i
].duration
)
3088 ieee80211_extend_noa_desc(data
, tsf
, i
);
3093 ieee80211_update_p2p_noa(data
, tsf
);
3097 EXPORT_SYMBOL(ieee80211_parse_p2p_noa
);
3099 void ieee80211_recalc_dtim(struct ieee80211_local
*local
,
3100 struct ieee80211_sub_if_data
*sdata
)
3102 u64 tsf
= drv_get_tsf(local
, sdata
);
3104 u16 beacon_int
= sdata
->vif
.bss_conf
.beacon_int
* 1024;
3105 u8 dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
3109 if (tsf
== -1ULL || !beacon_int
|| !dtim_period
)
3112 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3113 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
3117 ps
= &sdata
->bss
->ps
;
3118 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
3119 ps
= &sdata
->u
.mesh
.ps
;
3125 * actually finds last dtim_count, mac80211 will update in
3126 * __beacon_add_tim().
3127 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3129 do_div(tsf
, beacon_int
);
3130 bcns_from_dtim
= do_div(tsf
, dtim_period
);
3131 /* just had a DTIM */
3132 if (!bcns_from_dtim
)
3135 dtim_count
= dtim_period
- bcns_from_dtim
;
3137 ps
->dtim_count
= dtim_count
;
3140 static u8
ieee80211_chanctx_radar_detect(struct ieee80211_local
*local
,
3141 struct ieee80211_chanctx
*ctx
)
3143 struct ieee80211_sub_if_data
*sdata
;
3144 u8 radar_detect
= 0;
3146 lockdep_assert_held(&local
->chanctx_mtx
);
3148 if (WARN_ON(ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
))
3151 list_for_each_entry(sdata
, &ctx
->reserved_vifs
, reserved_chanctx_list
)
3152 if (sdata
->reserved_radar_required
)
3153 radar_detect
|= BIT(sdata
->reserved_chandef
.width
);
3156 * An in-place reservation context should not have any assigned vifs
3157 * until it replaces the other context.
3159 WARN_ON(ctx
->replace_state
== IEEE80211_CHANCTX_REPLACES_OTHER
&&
3160 !list_empty(&ctx
->assigned_vifs
));
3162 list_for_each_entry(sdata
, &ctx
->assigned_vifs
, assigned_chanctx_list
)
3163 if (sdata
->radar_required
)
3164 radar_detect
|= BIT(sdata
->vif
.bss_conf
.chandef
.width
);
3166 return radar_detect
;
3169 int ieee80211_check_combinations(struct ieee80211_sub_if_data
*sdata
,
3170 const struct cfg80211_chan_def
*chandef
,
3171 enum ieee80211_chanctx_mode chanmode
,
3174 struct ieee80211_local
*local
= sdata
->local
;
3175 struct ieee80211_sub_if_data
*sdata_iter
;
3176 enum nl80211_iftype iftype
= sdata
->wdev
.iftype
;
3177 int num
[NUM_NL80211_IFTYPES
];
3178 struct ieee80211_chanctx
*ctx
;
3179 int num_different_channels
= 0;
3182 lockdep_assert_held(&local
->chanctx_mtx
);
3184 if (WARN_ON(hweight32(radar_detect
) > 1))
3187 if (WARN_ON(chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
3192 num_different_channels
= 1;
3194 if (WARN_ON(iftype
>= NUM_NL80211_IFTYPES
))
3197 /* Always allow software iftypes */
3198 if (local
->hw
.wiphy
->software_iftypes
& BIT(iftype
)) {
3204 memset(num
, 0, sizeof(num
));
3206 if (iftype
!= NL80211_IFTYPE_UNSPECIFIED
)
3209 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
3210 if (ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
)
3212 radar_detect
|= ieee80211_chanctx_radar_detect(local
, ctx
);
3213 if (ctx
->mode
== IEEE80211_CHANCTX_EXCLUSIVE
) {
3214 num_different_channels
++;
3217 if (chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
3218 cfg80211_chandef_compatible(chandef
,
3221 num_different_channels
++;
3224 list_for_each_entry_rcu(sdata_iter
, &local
->interfaces
, list
) {
3225 struct wireless_dev
*wdev_iter
;
3227 wdev_iter
= &sdata_iter
->wdev
;
3229 if (sdata_iter
== sdata
||
3230 !ieee80211_sdata_running(sdata_iter
) ||
3231 local
->hw
.wiphy
->software_iftypes
& BIT(wdev_iter
->iftype
))
3234 num
[wdev_iter
->iftype
]++;
3238 if (total
== 1 && !radar_detect
)
3241 return cfg80211_check_combinations(local
->hw
.wiphy
,
3242 num_different_channels
,
3247 ieee80211_iter_max_chans(const struct ieee80211_iface_combination
*c
,
3250 u32
*max_num_different_channels
= data
;
3252 *max_num_different_channels
= max(*max_num_different_channels
,
3253 c
->num_different_channels
);
3256 int ieee80211_max_num_channels(struct ieee80211_local
*local
)
3258 struct ieee80211_sub_if_data
*sdata
;
3259 int num
[NUM_NL80211_IFTYPES
] = {};
3260 struct ieee80211_chanctx
*ctx
;
3261 int num_different_channels
= 0;
3262 u8 radar_detect
= 0;
3263 u32 max_num_different_channels
= 1;
3266 lockdep_assert_held(&local
->chanctx_mtx
);
3268 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
3269 if (ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
)
3272 num_different_channels
++;
3274 radar_detect
|= ieee80211_chanctx_radar_detect(local
, ctx
);
3277 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3278 num
[sdata
->wdev
.iftype
]++;
3280 err
= cfg80211_iter_combinations(local
->hw
.wiphy
,
3281 num_different_channels
, radar_detect
,
3282 num
, ieee80211_iter_max_chans
,
3283 &max_num_different_channels
);
3287 return max_num_different_channels
;
3290 u8
*ieee80211_add_wmm_info_ie(u8
*buf
, u8 qosinfo
)
3292 *buf
++ = WLAN_EID_VENDOR_SPECIFIC
;
3293 *buf
++ = 7; /* len */
3294 *buf
++ = 0x00; /* Microsoft OUI 00:50:F2 */
3297 *buf
++ = 2; /* WME */
3298 *buf
++ = 0; /* WME info */
3299 *buf
++ = 1; /* WME ver */
3300 *buf
++ = qosinfo
; /* U-APSD no in use */
3305 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data
*sdata
,
3306 struct sta_info
*sta
,
3307 struct txq_info
*txqi
, int tid
)
3309 skb_queue_head_init(&txqi
->queue
);
3310 txqi
->txq
.vif
= &sdata
->vif
;
3313 txqi
->txq
.sta
= &sta
->sta
;
3314 sta
->sta
.txq
[tid
] = &txqi
->txq
;
3315 txqi
->txq
.tid
= tid
;
3316 txqi
->txq
.ac
= ieee802_1d_to_ac
[tid
& 7];
3318 sdata
->vif
.txq
= &txqi
->txq
;
3320 txqi
->txq
.ac
= IEEE80211_AC_BE
;