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
7 * Copyright (C) 2015 Intel Deutschland GmbH
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * utilities for mac80211
16 #include <net/mac80211.h>
17 #include <linux/netdevice.h>
18 #include <linux/export.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/bitmap.h>
25 #include <linux/crc32.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/rtnetlink.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
38 /* privid for wiphys to determine whether they belong to us or not */
39 const void *const mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
41 struct ieee80211_hw
*wiphy_to_ieee80211_hw(struct wiphy
*wiphy
)
43 struct ieee80211_local
*local
;
46 local
= wiphy_priv(wiphy
);
49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw
);
51 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
54 struct ieee80211_hdr
*hdr
;
56 skb_queue_walk(&tx
->skbs
, skb
) {
57 hdr
= (struct ieee80211_hdr
*) skb
->data
;
58 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
62 int ieee80211_frame_duration(enum ieee80211_band band
, size_t len
,
63 int rate
, int erp
, int short_preamble
,
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
80 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
94 dur
= 16; /* SIFS + signal ext */
95 dur
+= 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur
+= 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 2 for 10 MHz
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
107 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
108 4 * rate
); /* T_SYM x N_SYM */
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 dur
= 10; /* aSIFSTime = 10 usec */
121 dur
+= short_preamble
? (72 + 24) : (144 + 48);
123 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
129 /* Exported duration function for driver use */
130 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
131 struct ieee80211_vif
*vif
,
132 enum ieee80211_band band
,
134 struct ieee80211_rate
*rate
)
136 struct ieee80211_sub_if_data
*sdata
;
139 bool short_preamble
= false;
143 sdata
= vif_to_sdata(vif
);
144 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
145 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
146 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
147 shift
= ieee80211_vif_get_shift(vif
);
150 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
151 short_preamble
, shift
);
153 return cpu_to_le16(dur
);
155 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
157 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
158 struct ieee80211_vif
*vif
, size_t frame_len
,
159 const struct ieee80211_tx_info
*frame_txctl
)
161 struct ieee80211_local
*local
= hw_to_local(hw
);
162 struct ieee80211_rate
*rate
;
163 struct ieee80211_sub_if_data
*sdata
;
165 int erp
, shift
= 0, bitrate
;
167 struct ieee80211_supported_band
*sband
;
169 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
171 short_preamble
= false;
173 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
177 sdata
= vif_to_sdata(vif
);
178 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
179 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
180 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
181 shift
= ieee80211_vif_get_shift(vif
);
184 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
187 dur
= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
188 erp
, short_preamble
, shift
);
189 /* Data frame duration */
190 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
191 erp
, short_preamble
, shift
);
193 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
194 erp
, short_preamble
, shift
);
196 return cpu_to_le16(dur
);
198 EXPORT_SYMBOL(ieee80211_rts_duration
);
200 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
201 struct ieee80211_vif
*vif
,
203 const struct ieee80211_tx_info
*frame_txctl
)
205 struct ieee80211_local
*local
= hw_to_local(hw
);
206 struct ieee80211_rate
*rate
;
207 struct ieee80211_sub_if_data
*sdata
;
209 int erp
, shift
= 0, bitrate
;
211 struct ieee80211_supported_band
*sband
;
213 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
215 short_preamble
= false;
217 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
220 sdata
= vif_to_sdata(vif
);
221 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
222 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
223 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
224 shift
= ieee80211_vif_get_shift(vif
);
227 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
229 /* Data frame duration */
230 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
231 erp
, short_preamble
, shift
);
232 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
234 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
235 erp
, short_preamble
, shift
);
238 return cpu_to_le16(dur
);
240 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
242 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
244 struct ieee80211_sub_if_data
*sdata
;
245 int n_acs
= IEEE80211_NUM_ACS
;
247 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
250 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
256 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
257 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
260 for (ac
= 0; ac
< n_acs
; ac
++) {
261 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
263 if (local
->ops
->wake_tx_queue
&&
264 (atomic_read(&sdata
->txqs_len
[ac
]) >
265 local
->hw
.txq_ac_max_pending
))
268 if (ac_queue
== queue
||
269 (sdata
->vif
.cab_queue
== queue
&&
270 local
->queue_stop_reasons
[ac_queue
] == 0 &&
271 skb_queue_empty(&local
->pending
[ac_queue
])))
272 netif_wake_subqueue(sdata
->dev
, ac
);
277 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
278 enum queue_stop_reason reason
,
281 struct ieee80211_local
*local
= hw_to_local(hw
);
283 trace_wake_queue(local
, queue
, reason
);
285 if (WARN_ON(queue
>= hw
->queues
))
288 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
292 local
->q_stop_reasons
[queue
][reason
] = 0;
294 local
->q_stop_reasons
[queue
][reason
]--;
296 if (local
->q_stop_reasons
[queue
][reason
] == 0)
297 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
299 if (local
->queue_stop_reasons
[queue
] != 0)
300 /* someone still has this queue stopped */
303 if (skb_queue_empty(&local
->pending
[queue
])) {
305 ieee80211_propagate_queue_wake(local
, queue
);
308 tasklet_schedule(&local
->tx_pending_tasklet
);
311 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
312 enum queue_stop_reason reason
,
315 struct ieee80211_local
*local
= hw_to_local(hw
);
318 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
319 __ieee80211_wake_queue(hw
, queue
, reason
, refcounted
);
320 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
323 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
325 ieee80211_wake_queue_by_reason(hw
, queue
,
326 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
329 EXPORT_SYMBOL(ieee80211_wake_queue
);
331 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
332 enum queue_stop_reason reason
,
335 struct ieee80211_local
*local
= hw_to_local(hw
);
336 struct ieee80211_sub_if_data
*sdata
;
337 int n_acs
= IEEE80211_NUM_ACS
;
339 trace_stop_queue(local
, queue
, reason
);
341 if (WARN_ON(queue
>= hw
->queues
))
345 local
->q_stop_reasons
[queue
][reason
] = 1;
347 local
->q_stop_reasons
[queue
][reason
]++;
349 if (__test_and_set_bit(reason
, &local
->queue_stop_reasons
[queue
]))
352 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
356 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
362 for (ac
= 0; ac
< n_acs
; ac
++) {
363 if (sdata
->vif
.hw_queue
[ac
] == queue
||
364 sdata
->vif
.cab_queue
== queue
)
365 netif_stop_subqueue(sdata
->dev
, ac
);
371 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
372 enum queue_stop_reason reason
,
375 struct ieee80211_local
*local
= hw_to_local(hw
);
378 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
379 __ieee80211_stop_queue(hw
, queue
, reason
, refcounted
);
380 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
383 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
385 ieee80211_stop_queue_by_reason(hw
, queue
,
386 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
389 EXPORT_SYMBOL(ieee80211_stop_queue
);
391 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
394 struct ieee80211_hw
*hw
= &local
->hw
;
396 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
397 int queue
= info
->hw_queue
;
399 if (WARN_ON(!info
->control
.vif
)) {
400 ieee80211_free_txskb(&local
->hw
, skb
);
404 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
405 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
407 __skb_queue_tail(&local
->pending
[queue
], skb
);
408 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
410 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
413 void ieee80211_add_pending_skbs(struct ieee80211_local
*local
,
414 struct sk_buff_head
*skbs
)
416 struct ieee80211_hw
*hw
= &local
->hw
;
421 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
422 while ((skb
= skb_dequeue(skbs
))) {
423 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
425 if (WARN_ON(!info
->control
.vif
)) {
426 ieee80211_free_txskb(&local
->hw
, skb
);
430 queue
= info
->hw_queue
;
432 __ieee80211_stop_queue(hw
, queue
,
433 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
436 __skb_queue_tail(&local
->pending
[queue
], skb
);
439 for (i
= 0; i
< hw
->queues
; i
++)
440 __ieee80211_wake_queue(hw
, i
,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
,
443 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
446 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
447 unsigned long queues
,
448 enum queue_stop_reason reason
,
451 struct ieee80211_local
*local
= hw_to_local(hw
);
455 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
457 for_each_set_bit(i
, &queues
, hw
->queues
)
458 __ieee80211_stop_queue(hw
, i
, reason
, refcounted
);
460 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
463 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
465 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
466 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
469 EXPORT_SYMBOL(ieee80211_stop_queues
);
471 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
473 struct ieee80211_local
*local
= hw_to_local(hw
);
477 if (WARN_ON(queue
>= hw
->queues
))
480 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
481 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
482 &local
->queue_stop_reasons
[queue
]);
483 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
486 EXPORT_SYMBOL(ieee80211_queue_stopped
);
488 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
489 unsigned long queues
,
490 enum queue_stop_reason reason
,
493 struct ieee80211_local
*local
= hw_to_local(hw
);
497 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
499 for_each_set_bit(i
, &queues
, hw
->queues
)
500 __ieee80211_wake_queue(hw
, i
, reason
, refcounted
);
502 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
505 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
507 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
508 IEEE80211_QUEUE_STOP_REASON_DRIVER
,
511 EXPORT_SYMBOL(ieee80211_wake_queues
);
514 ieee80211_get_vif_queues(struct ieee80211_local
*local
,
515 struct ieee80211_sub_if_data
*sdata
)
519 if (sdata
&& ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
)) {
524 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
525 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
526 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
527 queues
|= BIT(sdata
->vif
.cab_queue
);
530 queues
= BIT(local
->hw
.queues
) - 1;
536 void __ieee80211_flush_queues(struct ieee80211_local
*local
,
537 struct ieee80211_sub_if_data
*sdata
,
538 unsigned int queues
, bool drop
)
540 if (!local
->ops
->flush
)
544 * If no queue was set, or if the HW doesn't support
545 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
547 if (!queues
|| !ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
548 queues
= ieee80211_get_vif_queues(local
, sdata
);
550 ieee80211_stop_queues_by_reason(&local
->hw
, queues
,
551 IEEE80211_QUEUE_STOP_REASON_FLUSH
,
554 drv_flush(local
, sdata
, queues
, drop
);
556 ieee80211_wake_queues_by_reason(&local
->hw
, queues
,
557 IEEE80211_QUEUE_STOP_REASON_FLUSH
,
561 void ieee80211_flush_queues(struct ieee80211_local
*local
,
562 struct ieee80211_sub_if_data
*sdata
, bool drop
)
564 __ieee80211_flush_queues(local
, sdata
, 0, drop
);
567 void ieee80211_stop_vif_queues(struct ieee80211_local
*local
,
568 struct ieee80211_sub_if_data
*sdata
,
569 enum queue_stop_reason reason
)
571 ieee80211_stop_queues_by_reason(&local
->hw
,
572 ieee80211_get_vif_queues(local
, sdata
),
576 void ieee80211_wake_vif_queues(struct ieee80211_local
*local
,
577 struct ieee80211_sub_if_data
*sdata
,
578 enum queue_stop_reason reason
)
580 ieee80211_wake_queues_by_reason(&local
->hw
,
581 ieee80211_get_vif_queues(local
, sdata
),
585 static void __iterate_interfaces(struct ieee80211_local
*local
,
587 void (*iterator
)(void *data
, u8
*mac
,
588 struct ieee80211_vif
*vif
),
591 struct ieee80211_sub_if_data
*sdata
;
592 bool active_only
= iter_flags
& IEEE80211_IFACE_ITER_ACTIVE
;
594 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
595 switch (sdata
->vif
.type
) {
596 case NL80211_IFTYPE_MONITOR
:
597 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
600 case NL80211_IFTYPE_AP_VLAN
:
605 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
606 active_only
&& !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
608 if (ieee80211_sdata_running(sdata
) || !active_only
)
609 iterator(data
, sdata
->vif
.addr
,
613 sdata
= rcu_dereference_check(local
->monitor_sdata
,
614 lockdep_is_held(&local
->iflist_mtx
) ||
615 lockdep_rtnl_is_held());
617 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
|| !active_only
||
618 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
619 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
622 void ieee80211_iterate_interfaces(
623 struct ieee80211_hw
*hw
, u32 iter_flags
,
624 void (*iterator
)(void *data
, u8
*mac
,
625 struct ieee80211_vif
*vif
),
628 struct ieee80211_local
*local
= hw_to_local(hw
);
630 mutex_lock(&local
->iflist_mtx
);
631 __iterate_interfaces(local
, iter_flags
, iterator
, data
);
632 mutex_unlock(&local
->iflist_mtx
);
634 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces
);
636 void ieee80211_iterate_active_interfaces_atomic(
637 struct ieee80211_hw
*hw
, u32 iter_flags
,
638 void (*iterator
)(void *data
, u8
*mac
,
639 struct ieee80211_vif
*vif
),
642 struct ieee80211_local
*local
= hw_to_local(hw
);
645 __iterate_interfaces(local
, iter_flags
| IEEE80211_IFACE_ITER_ACTIVE
,
649 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
651 void ieee80211_iterate_active_interfaces_rtnl(
652 struct ieee80211_hw
*hw
, u32 iter_flags
,
653 void (*iterator
)(void *data
, u8
*mac
,
654 struct ieee80211_vif
*vif
),
657 struct ieee80211_local
*local
= hw_to_local(hw
);
661 __iterate_interfaces(local
, iter_flags
| IEEE80211_IFACE_ITER_ACTIVE
,
664 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl
);
666 static void __iterate_stations(struct ieee80211_local
*local
,
667 void (*iterator
)(void *data
,
668 struct ieee80211_sta
*sta
),
671 struct sta_info
*sta
;
673 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
677 iterator(data
, &sta
->sta
);
681 void ieee80211_iterate_stations_atomic(struct ieee80211_hw
*hw
,
682 void (*iterator
)(void *data
,
683 struct ieee80211_sta
*sta
),
686 struct ieee80211_local
*local
= hw_to_local(hw
);
689 __iterate_stations(local
, iterator
, data
);
692 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic
);
694 struct ieee80211_vif
*wdev_to_ieee80211_vif(struct wireless_dev
*wdev
)
696 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
698 if (!ieee80211_sdata_running(sdata
) ||
699 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
703 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif
);
705 struct wireless_dev
*ieee80211_vif_to_wdev(struct ieee80211_vif
*vif
)
707 struct ieee80211_sub_if_data
*sdata
;
712 sdata
= vif_to_sdata(vif
);
714 if (!ieee80211_sdata_running(sdata
) ||
715 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
720 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev
);
723 * Nothing should have been stuffed into the workqueue during
724 * the suspend->resume cycle. Since we can't check each caller
725 * of this function if we are already quiescing / suspended,
726 * check here and don't WARN since this can actually happen when
727 * the rx path (for example) is racing against __ieee80211_suspend
728 * and suspending / quiescing was set after the rx path checked
731 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
733 if (local
->quiescing
|| (local
->suspended
&& !local
->resuming
)) {
734 pr_warn("queueing ieee80211 work while going to suspend\n");
741 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
743 struct ieee80211_local
*local
= hw_to_local(hw
);
745 if (!ieee80211_can_queue_work(local
))
748 queue_work(local
->workqueue
, work
);
750 EXPORT_SYMBOL(ieee80211_queue_work
);
752 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
753 struct delayed_work
*dwork
,
756 struct ieee80211_local
*local
= hw_to_local(hw
);
758 if (!ieee80211_can_queue_work(local
))
761 queue_delayed_work(local
->workqueue
, dwork
, delay
);
763 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
765 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
766 struct ieee802_11_elems
*elems
,
770 const u8
*pos
= start
;
771 bool calc_crc
= filter
!= 0;
772 DECLARE_BITMAP(seen_elems
, 256);
775 bitmap_zero(seen_elems
, 256);
776 memset(elems
, 0, sizeof(*elems
));
777 elems
->ie_start
= start
;
778 elems
->total_len
= len
;
782 bool elem_parse_failed
;
789 elems
->parse_error
= true;
795 case WLAN_EID_SUPP_RATES
:
796 case WLAN_EID_FH_PARAMS
:
797 case WLAN_EID_DS_PARAMS
:
798 case WLAN_EID_CF_PARAMS
:
800 case WLAN_EID_IBSS_PARAMS
:
801 case WLAN_EID_CHALLENGE
:
803 case WLAN_EID_ERP_INFO
:
804 case WLAN_EID_EXT_SUPP_RATES
:
805 case WLAN_EID_HT_CAPABILITY
:
806 case WLAN_EID_HT_OPERATION
:
807 case WLAN_EID_VHT_CAPABILITY
:
808 case WLAN_EID_VHT_OPERATION
:
809 case WLAN_EID_MESH_ID
:
810 case WLAN_EID_MESH_CONFIG
:
811 case WLAN_EID_PEER_MGMT
:
816 case WLAN_EID_CHANNEL_SWITCH
:
817 case WLAN_EID_EXT_CHANSWITCH_ANN
:
818 case WLAN_EID_COUNTRY
:
819 case WLAN_EID_PWR_CONSTRAINT
:
820 case WLAN_EID_TIMEOUT_INTERVAL
:
821 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
822 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
823 case WLAN_EID_CHAN_SWITCH_PARAM
:
824 case WLAN_EID_EXT_CAPABILITY
:
825 case WLAN_EID_CHAN_SWITCH_TIMING
:
826 case WLAN_EID_LINK_ID
:
828 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
829 * that if the content gets bigger it might be needed more than once
831 if (test_bit(id
, seen_elems
)) {
832 elems
->parse_error
= true;
840 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
841 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
843 elem_parse_failed
= false;
846 case WLAN_EID_LINK_ID
:
847 if (elen
+ 2 != sizeof(struct ieee80211_tdls_lnkie
)) {
848 elem_parse_failed
= true;
851 elems
->lnk_id
= (void *)(pos
- 2);
853 case WLAN_EID_CHAN_SWITCH_TIMING
:
854 if (elen
!= sizeof(struct ieee80211_ch_switch_timing
)) {
855 elem_parse_failed
= true;
858 elems
->ch_sw_timing
= (void *)pos
;
860 case WLAN_EID_EXT_CAPABILITY
:
861 elems
->ext_capab
= pos
;
862 elems
->ext_capab_len
= elen
;
866 elems
->ssid_len
= elen
;
868 case WLAN_EID_SUPP_RATES
:
869 elems
->supp_rates
= pos
;
870 elems
->supp_rates_len
= elen
;
872 case WLAN_EID_DS_PARAMS
:
874 elems
->ds_params
= pos
;
876 elem_parse_failed
= true;
879 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
880 elems
->tim
= (void *)pos
;
881 elems
->tim_len
= elen
;
883 elem_parse_failed
= true;
885 case WLAN_EID_CHALLENGE
:
886 elems
->challenge
= pos
;
887 elems
->challenge_len
= elen
;
889 case WLAN_EID_VENDOR_SPECIFIC
:
890 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
892 /* Microsoft OUI (00:50:F2) */
895 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
897 if (elen
>= 5 && pos
[3] == 2) {
898 /* OUI Type 2 - WMM IE */
900 elems
->wmm_info
= pos
;
901 elems
->wmm_info_len
= elen
;
902 } else if (pos
[4] == 1) {
903 elems
->wmm_param
= pos
;
904 elems
->wmm_param_len
= elen
;
911 elems
->rsn_len
= elen
;
913 case WLAN_EID_ERP_INFO
:
915 elems
->erp_info
= pos
;
917 elem_parse_failed
= true;
919 case WLAN_EID_EXT_SUPP_RATES
:
920 elems
->ext_supp_rates
= pos
;
921 elems
->ext_supp_rates_len
= elen
;
923 case WLAN_EID_HT_CAPABILITY
:
924 if (elen
>= sizeof(struct ieee80211_ht_cap
))
925 elems
->ht_cap_elem
= (void *)pos
;
927 elem_parse_failed
= true;
929 case WLAN_EID_HT_OPERATION
:
930 if (elen
>= sizeof(struct ieee80211_ht_operation
))
931 elems
->ht_operation
= (void *)pos
;
933 elem_parse_failed
= true;
935 case WLAN_EID_VHT_CAPABILITY
:
936 if (elen
>= sizeof(struct ieee80211_vht_cap
))
937 elems
->vht_cap_elem
= (void *)pos
;
939 elem_parse_failed
= true;
941 case WLAN_EID_VHT_OPERATION
:
942 if (elen
>= sizeof(struct ieee80211_vht_operation
))
943 elems
->vht_operation
= (void *)pos
;
945 elem_parse_failed
= true;
947 case WLAN_EID_OPMODE_NOTIF
:
949 elems
->opmode_notif
= pos
;
951 elem_parse_failed
= true;
953 case WLAN_EID_MESH_ID
:
954 elems
->mesh_id
= pos
;
955 elems
->mesh_id_len
= elen
;
957 case WLAN_EID_MESH_CONFIG
:
958 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
959 elems
->mesh_config
= (void *)pos
;
961 elem_parse_failed
= true;
963 case WLAN_EID_PEER_MGMT
:
964 elems
->peering
= pos
;
965 elems
->peering_len
= elen
;
967 case WLAN_EID_MESH_AWAKE_WINDOW
:
969 elems
->awake_window
= (void *)pos
;
973 elems
->preq_len
= elen
;
977 elems
->prep_len
= elen
;
981 elems
->perr_len
= elen
;
984 if (elen
>= sizeof(struct ieee80211_rann_ie
))
985 elems
->rann
= (void *)pos
;
987 elem_parse_failed
= true;
989 case WLAN_EID_CHANNEL_SWITCH
:
990 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
991 elem_parse_failed
= true;
994 elems
->ch_switch_ie
= (void *)pos
;
996 case WLAN_EID_EXT_CHANSWITCH_ANN
:
997 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
998 elem_parse_failed
= true;
1001 elems
->ext_chansw_ie
= (void *)pos
;
1003 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
1004 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
1005 elem_parse_failed
= true;
1008 elems
->sec_chan_offs
= (void *)pos
;
1010 case WLAN_EID_CHAN_SWITCH_PARAM
:
1012 sizeof(*elems
->mesh_chansw_params_ie
)) {
1013 elem_parse_failed
= true;
1016 elems
->mesh_chansw_params_ie
= (void *)pos
;
1018 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
1020 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
1021 elem_parse_failed
= true;
1024 elems
->wide_bw_chansw_ie
= (void *)pos
;
1026 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
1028 elem_parse_failed
= true;
1032 * This is a bit tricky, but as we only care about
1033 * the wide bandwidth channel switch element, so
1034 * just parse it out manually.
1036 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
1039 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
1040 elems
->wide_bw_chansw_ie
=
1043 elem_parse_failed
= true;
1046 case WLAN_EID_COUNTRY
:
1047 elems
->country_elem
= pos
;
1048 elems
->country_elem_len
= elen
;
1050 case WLAN_EID_PWR_CONSTRAINT
:
1052 elem_parse_failed
= true;
1055 elems
->pwr_constr_elem
= pos
;
1057 case WLAN_EID_CISCO_VENDOR_SPECIFIC
:
1058 /* Lots of different options exist, but we only care
1059 * about the Dynamic Transmit Power Control element.
1060 * First check for the Cisco OUI, then for the DTPC
1064 elem_parse_failed
= true;
1068 if (pos
[0] != 0x00 || pos
[1] != 0x40 ||
1069 pos
[2] != 0x96 || pos
[3] != 0x00)
1073 elem_parse_failed
= true;
1078 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
1080 elems
->cisco_dtpc_elem
= pos
;
1082 case WLAN_EID_TIMEOUT_INTERVAL
:
1083 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
1084 elems
->timeout_int
= (void *)pos
;
1086 elem_parse_failed
= true;
1092 if (elem_parse_failed
)
1093 elems
->parse_error
= true;
1095 __set_bit(id
, seen_elems
);
1102 elems
->parse_error
= true;
1107 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
1108 bool bss_notify
, bool enable_qos
)
1110 struct ieee80211_local
*local
= sdata
->local
;
1111 struct ieee80211_tx_queue_params qparam
;
1112 struct ieee80211_chanctx_conf
*chanctx_conf
;
1115 bool is_ocb
; /* Use another EDCA parameters if dot11OCBActivated=true */
1118 if (!local
->ops
->conf_tx
)
1121 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1124 memset(&qparam
, 0, sizeof(qparam
));
1127 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1128 use_11b
= (chanctx_conf
&&
1129 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1130 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1133 is_ocb
= (sdata
->vif
.type
== NL80211_IFTYPE_OCB
);
1135 /* Set defaults according to 802.11-2007 Table 7-37 */
1142 /* Confiure old 802.11b/g medium access rules. */
1143 qparam
.cw_max
= aCWmax
;
1144 qparam
.cw_min
= aCWmin
;
1148 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1149 /* Update if QoS is enabled. */
1152 case IEEE80211_AC_BK
:
1153 qparam
.cw_max
= aCWmax
;
1154 qparam
.cw_min
= aCWmin
;
1161 /* never happens but let's not leave undefined */
1163 case IEEE80211_AC_BE
:
1164 qparam
.cw_max
= aCWmax
;
1165 qparam
.cw_min
= aCWmin
;
1172 case IEEE80211_AC_VI
:
1173 qparam
.cw_max
= aCWmin
;
1174 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1178 qparam
.txop
= 6016/32;
1180 qparam
.txop
= 3008/32;
1187 case IEEE80211_AC_VO
:
1188 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1189 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1193 qparam
.txop
= 3264/32;
1195 qparam
.txop
= 1504/32;
1201 qparam
.uapsd
= false;
1203 sdata
->tx_conf
[ac
] = qparam
;
1204 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1207 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1208 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1209 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1211 ieee80211_bss_info_change_notify(sdata
,
1216 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1217 u16 transaction
, u16 auth_alg
, u16 status
,
1218 const u8
*extra
, size_t extra_len
, const u8
*da
,
1219 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1222 struct ieee80211_local
*local
= sdata
->local
;
1223 struct sk_buff
*skb
;
1224 struct ieee80211_mgmt
*mgmt
;
1227 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1228 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ IEEE80211_WEP_IV_LEN
+
1229 24 + 6 + extra_len
+ IEEE80211_WEP_ICV_LEN
);
1233 skb_reserve(skb
, local
->hw
.extra_tx_headroom
+ IEEE80211_WEP_IV_LEN
);
1235 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1236 memset(mgmt
, 0, 24 + 6);
1237 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1238 IEEE80211_STYPE_AUTH
);
1239 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1240 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1241 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1242 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1243 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1244 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1246 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1248 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1249 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1250 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1254 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1256 ieee80211_tx_skb(sdata
, skb
);
1259 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1260 const u8
*bssid
, u16 stype
, u16 reason
,
1261 bool send_frame
, u8
*frame_buf
)
1263 struct ieee80211_local
*local
= sdata
->local
;
1264 struct sk_buff
*skb
;
1265 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1268 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1269 mgmt
->duration
= 0; /* initialize only */
1270 mgmt
->seq_ctrl
= 0; /* initialize only */
1271 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1272 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1273 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1274 /* u.deauth.reason_code == u.disassoc.reason_code */
1275 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1278 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1279 IEEE80211_DEAUTH_FRAME_LEN
);
1283 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1286 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1287 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1289 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1290 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1291 IEEE80211_SKB_CB(skb
)->flags
|=
1292 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1294 ieee80211_tx_skb(sdata
, skb
);
1298 static int ieee80211_build_preq_ies_band(struct ieee80211_local
*local
,
1299 u8
*buffer
, size_t buffer_len
,
1300 const u8
*ie
, size_t ie_len
,
1301 enum ieee80211_band band
,
1303 struct cfg80211_chan_def
*chandef
,
1306 struct ieee80211_supported_band
*sband
;
1307 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1309 int supp_rates_len
, i
;
1315 bool have_80mhz
= false;
1319 sband
= local
->hw
.wiphy
->bands
[band
];
1320 if (WARN_ON_ONCE(!sband
))
1323 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1324 shift
= ieee80211_chandef_get_shift(chandef
);
1327 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1328 if ((BIT(i
) & rate_mask
) == 0)
1329 continue; /* skip rate */
1330 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1333 rates
[num_rates
++] =
1334 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1338 supp_rates_len
= min_t(int, num_rates
, 8);
1340 if (end
- pos
< 2 + supp_rates_len
)
1342 *pos
++ = WLAN_EID_SUPP_RATES
;
1343 *pos
++ = supp_rates_len
;
1344 memcpy(pos
, rates
, supp_rates_len
);
1345 pos
+= supp_rates_len
;
1347 /* insert "request information" if in custom IEs */
1349 static const u8 before_extrates
[] = {
1351 WLAN_EID_SUPP_RATES
,
1354 noffset
= ieee80211_ie_split(ie
, ie_len
,
1356 ARRAY_SIZE(before_extrates
),
1358 if (end
- pos
< noffset
- *offset
)
1360 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1361 pos
+= noffset
- *offset
;
1365 ext_rates_len
= num_rates
- supp_rates_len
;
1366 if (ext_rates_len
> 0) {
1367 if (end
- pos
< 2 + ext_rates_len
)
1369 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1370 *pos
++ = ext_rates_len
;
1371 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1372 pos
+= ext_rates_len
;
1375 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1378 *pos
++ = WLAN_EID_DS_PARAMS
;
1380 *pos
++ = ieee80211_frequency_to_channel(
1381 chandef
->chan
->center_freq
);
1384 /* insert custom IEs that go before HT */
1386 static const u8 before_ht
[] = {
1388 WLAN_EID_SUPP_RATES
,
1390 WLAN_EID_EXT_SUPP_RATES
,
1392 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1394 noffset
= ieee80211_ie_split(ie
, ie_len
,
1395 before_ht
, ARRAY_SIZE(before_ht
),
1397 if (end
- pos
< noffset
- *offset
)
1399 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1400 pos
+= noffset
- *offset
;
1404 if (sband
->ht_cap
.ht_supported
) {
1405 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1407 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1412 * If adding more here, adjust code in main.c
1413 * that calculates local->scan_ies_len.
1416 /* insert custom IEs that go before VHT */
1418 static const u8 before_vht
[] = {
1420 WLAN_EID_SUPP_RATES
,
1422 WLAN_EID_EXT_SUPP_RATES
,
1424 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1425 WLAN_EID_HT_CAPABILITY
,
1426 WLAN_EID_BSS_COEX_2040
,
1427 WLAN_EID_EXT_CAPABILITY
,
1429 WLAN_EID_CHANNEL_USAGE
,
1430 WLAN_EID_INTERWORKING
,
1431 /* mesh ID can't happen here */
1432 /* 60 GHz can't happen here right now */
1434 noffset
= ieee80211_ie_split(ie
, ie_len
,
1435 before_vht
, ARRAY_SIZE(before_vht
),
1437 if (end
- pos
< noffset
- *offset
)
1439 memcpy(pos
, ie
+ *offset
, noffset
- *offset
);
1440 pos
+= noffset
- *offset
;
1444 /* Check if any channel in this sband supports at least 80 MHz */
1445 for (i
= 0; i
< sband
->n_channels
; i
++) {
1446 if (sband
->channels
[i
].flags
& (IEEE80211_CHAN_DISABLED
|
1447 IEEE80211_CHAN_NO_80MHZ
))
1454 if (sband
->vht_cap
.vht_supported
&& have_80mhz
) {
1455 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1457 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1458 sband
->vht_cap
.cap
);
1461 return pos
- buffer
;
1463 WARN_ONCE(1, "not enough space for preq IEs\n");
1464 return pos
- buffer
;
1467 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1469 struct ieee80211_scan_ies
*ie_desc
,
1470 const u8
*ie
, size_t ie_len
,
1471 u8 bands_used
, u32
*rate_masks
,
1472 struct cfg80211_chan_def
*chandef
)
1474 size_t pos
= 0, old_pos
= 0, custom_ie_offset
= 0;
1477 memset(ie_desc
, 0, sizeof(*ie_desc
));
1479 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1480 if (bands_used
& BIT(i
)) {
1481 pos
+= ieee80211_build_preq_ies_band(local
,
1488 ie_desc
->ies
[i
] = buffer
+ old_pos
;
1489 ie_desc
->len
[i
] = pos
- old_pos
;
1494 /* add any remaining custom IEs */
1496 if (WARN_ONCE(buffer_len
- pos
< ie_len
- custom_ie_offset
,
1497 "not enough space for preq custom IEs\n"))
1499 memcpy(buffer
+ pos
, ie
+ custom_ie_offset
,
1500 ie_len
- custom_ie_offset
);
1501 ie_desc
->common_ies
= buffer
+ pos
;
1502 ie_desc
->common_ie_len
= ie_len
- custom_ie_offset
;
1503 pos
+= ie_len
- custom_ie_offset
;
1509 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1510 const u8
*src
, const u8
*dst
,
1512 struct ieee80211_channel
*chan
,
1513 const u8
*ssid
, size_t ssid_len
,
1514 const u8
*ie
, size_t ie_len
,
1517 struct ieee80211_local
*local
= sdata
->local
;
1518 struct cfg80211_chan_def chandef
;
1519 struct sk_buff
*skb
;
1520 struct ieee80211_mgmt
*mgmt
;
1522 u32 rate_masks
[IEEE80211_NUM_BANDS
] = {};
1523 struct ieee80211_scan_ies dummy_ie_desc
;
1526 * Do not send DS Channel parameter for directed probe requests
1527 * in order to maximize the chance that we get a response. Some
1528 * badly-behaved APs don't respond when this parameter is included.
1530 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1532 chandef
.chan
= NULL
;
1534 chandef
.chan
= chan
;
1536 skb
= ieee80211_probereq_get(&local
->hw
, src
, ssid
, ssid_len
,
1541 rate_masks
[chan
->band
] = ratemask
;
1542 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1543 skb_tailroom(skb
), &dummy_ie_desc
,
1544 ie
, ie_len
, BIT(chan
->band
),
1545 rate_masks
, &chandef
);
1546 skb_put(skb
, ies_len
);
1549 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1550 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1551 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1554 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1559 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
,
1560 const u8
*src
, const u8
*dst
,
1561 const u8
*ssid
, size_t ssid_len
,
1562 const u8
*ie
, size_t ie_len
,
1563 u32 ratemask
, bool directed
, u32 tx_flags
,
1564 struct ieee80211_channel
*channel
, bool scan
)
1566 struct sk_buff
*skb
;
1568 skb
= ieee80211_build_probe_req(sdata
, src
, dst
, ratemask
, channel
,
1570 ie
, ie_len
, directed
);
1572 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1574 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1576 ieee80211_tx_skb(sdata
, skb
);
1580 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1581 struct ieee802_11_elems
*elems
,
1582 enum ieee80211_band band
, u32
*basic_rates
)
1584 struct ieee80211_supported_band
*sband
;
1586 u32 supp_rates
, rate_flags
;
1588 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1590 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1591 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1593 if (WARN_ON(!sband
))
1596 num_rates
= sband
->n_bitrates
;
1598 for (i
= 0; i
< elems
->supp_rates_len
+
1599 elems
->ext_supp_rates_len
; i
++) {
1603 if (i
< elems
->supp_rates_len
)
1604 rate
= elems
->supp_rates
[i
];
1605 else if (elems
->ext_supp_rates
)
1606 rate
= elems
->ext_supp_rates
1607 [i
- elems
->supp_rates_len
];
1608 own_rate
= 5 * (rate
& 0x7f);
1609 is_basic
= !!(rate
& 0x80);
1611 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1614 for (j
= 0; j
< num_rates
; j
++) {
1616 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1620 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1623 if (brate
== own_rate
) {
1624 supp_rates
|= BIT(j
);
1625 if (basic_rates
&& is_basic
)
1626 *basic_rates
|= BIT(j
);
1633 void ieee80211_stop_device(struct ieee80211_local
*local
)
1635 ieee80211_led_radio(local
, false);
1636 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1638 cancel_work_sync(&local
->reconfig_filter
);
1640 flush_workqueue(local
->workqueue
);
1644 static void ieee80211_handle_reconfig_failure(struct ieee80211_local
*local
)
1646 struct ieee80211_sub_if_data
*sdata
;
1647 struct ieee80211_chanctx
*ctx
;
1650 * We get here if during resume the device can't be restarted properly.
1651 * We might also get here if this happens during HW reset, which is a
1652 * slightly different situation and we need to drop all connections in
1655 * Ask cfg80211 to turn off all interfaces, this will result in more
1656 * warnings but at least we'll then get into a clean stopped state.
1659 local
->resuming
= false;
1660 local
->suspended
= false;
1661 local
->in_reconfig
= false;
1663 /* scheduled scan clearly can't be running any more, but tell
1664 * cfg80211 and clear local state
1666 ieee80211_sched_scan_end(local
);
1668 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1669 sdata
->flags
&= ~IEEE80211_SDATA_IN_DRIVER
;
1671 /* Mark channel contexts as not being in the driver any more to avoid
1672 * removing them from the driver during the shutdown process...
1674 mutex_lock(&local
->chanctx_mtx
);
1675 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1676 ctx
->driver_present
= false;
1677 mutex_unlock(&local
->chanctx_mtx
);
1679 cfg80211_shutdown_all_interfaces(local
->hw
.wiphy
);
1682 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1683 struct ieee80211_sub_if_data
*sdata
)
1685 struct ieee80211_chanctx_conf
*conf
;
1686 struct ieee80211_chanctx
*ctx
;
1688 if (!local
->use_chanctx
)
1691 mutex_lock(&local
->chanctx_mtx
);
1692 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1693 lockdep_is_held(&local
->chanctx_mtx
));
1695 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1696 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1698 mutex_unlock(&local
->chanctx_mtx
);
1701 int ieee80211_reconfig(struct ieee80211_local
*local
)
1703 struct ieee80211_hw
*hw
= &local
->hw
;
1704 struct ieee80211_sub_if_data
*sdata
;
1705 struct ieee80211_chanctx
*ctx
;
1706 struct sta_info
*sta
;
1708 bool reconfig_due_to_wowlan
= false;
1709 struct ieee80211_sub_if_data
*sched_scan_sdata
;
1710 struct cfg80211_sched_scan_request
*sched_scan_req
;
1711 bool sched_scan_stopped
= false;
1712 bool suspended
= local
->suspended
;
1714 /* nothing to do if HW shouldn't run */
1715 if (!local
->open_count
)
1720 local
->resuming
= true;
1722 if (local
->wowlan
) {
1724 * In the wowlan case, both mac80211 and the device
1725 * are functional when the resume op is called, so
1726 * clear local->suspended so the device could operate
1727 * normally (e.g. pass rx frames).
1729 local
->suspended
= false;
1730 res
= drv_resume(local
);
1731 local
->wowlan
= false;
1733 local
->resuming
= false;
1740 * res is 1, which means the driver requested
1741 * to go through a regular reset on wakeup.
1742 * restore local->suspended in this case.
1744 reconfig_due_to_wowlan
= true;
1745 local
->suspended
= true;
1750 * In case of hw_restart during suspend (without wowlan),
1751 * cancel restart work, as we are reconfiguring the device
1753 * Note that restart_work is scheduled on a frozen workqueue,
1754 * so we can't deadlock in this case.
1756 if (suspended
&& local
->in_reconfig
&& !reconfig_due_to_wowlan
)
1757 cancel_work_sync(&local
->restart_work
);
1759 local
->started
= false;
1762 * Upon resume hardware can sometimes be goofy due to
1763 * various platform / driver / bus issues, so restarting
1764 * the device may at times not work immediately. Propagate
1767 res
= drv_start(local
);
1770 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1772 WARN(1, "Hardware became unavailable during restart.\n");
1773 ieee80211_handle_reconfig_failure(local
);
1777 /* setup fragmentation threshold */
1778 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1780 /* setup RTS threshold */
1781 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1783 /* reset coverage class */
1784 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1786 ieee80211_led_radio(local
, true);
1787 ieee80211_mod_tpt_led_trig(local
,
1788 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1790 /* add interfaces */
1791 sdata
= rtnl_dereference(local
->monitor_sdata
);
1793 /* in HW restart it exists already */
1794 WARN_ON(local
->resuming
);
1795 res
= drv_add_interface(local
, sdata
);
1797 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
1803 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1804 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1805 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1806 ieee80211_sdata_running(sdata
)) {
1807 res
= drv_add_interface(local
, sdata
);
1813 /* If adding any of the interfaces failed above, roll back and
1817 list_for_each_entry_continue_reverse(sdata
, &local
->interfaces
,
1819 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1820 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1821 ieee80211_sdata_running(sdata
))
1822 drv_remove_interface(local
, sdata
);
1823 ieee80211_handle_reconfig_failure(local
);
1827 /* add channel contexts */
1828 if (local
->use_chanctx
) {
1829 mutex_lock(&local
->chanctx_mtx
);
1830 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1831 if (ctx
->replace_state
!=
1832 IEEE80211_CHANCTX_REPLACES_OTHER
)
1833 WARN_ON(drv_add_chanctx(local
, ctx
));
1834 mutex_unlock(&local
->chanctx_mtx
);
1836 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1837 if (!ieee80211_sdata_running(sdata
))
1839 ieee80211_assign_chanctx(local
, sdata
);
1842 sdata
= rtnl_dereference(local
->monitor_sdata
);
1843 if (sdata
&& ieee80211_sdata_running(sdata
))
1844 ieee80211_assign_chanctx(local
, sdata
);
1848 mutex_lock(&local
->sta_mtx
);
1849 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1850 enum ieee80211_sta_state state
;
1855 /* AP-mode stations will be added later */
1856 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1859 for (state
= IEEE80211_STA_NOTEXIST
;
1860 state
< sta
->sta_state
; state
++)
1861 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1864 mutex_unlock(&local
->sta_mtx
);
1866 /* reconfigure tx conf */
1867 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1868 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1869 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1870 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1871 !ieee80211_sdata_running(sdata
))
1874 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1875 drv_conf_tx(local
, sdata
, i
,
1876 &sdata
->tx_conf
[i
]);
1880 /* reconfigure hardware */
1881 ieee80211_hw_config(local
, ~0);
1883 ieee80211_configure_filter(local
);
1885 /* Finally also reconfigure all the BSS information */
1886 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1889 if (!ieee80211_sdata_running(sdata
))
1892 /* common change flags for all interface types */
1893 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1894 BSS_CHANGED_ERP_PREAMBLE
|
1895 BSS_CHANGED_ERP_SLOT
|
1897 BSS_CHANGED_BASIC_RATES
|
1898 BSS_CHANGED_BEACON_INT
|
1903 BSS_CHANGED_TXPOWER
;
1905 switch (sdata
->vif
.type
) {
1906 case NL80211_IFTYPE_STATION
:
1907 changed
|= BSS_CHANGED_ASSOC
|
1908 BSS_CHANGED_ARP_FILTER
|
1911 /* Re-send beacon info report to the driver */
1912 if (sdata
->u
.mgd
.have_beacon
)
1913 changed
|= BSS_CHANGED_BEACON_INFO
;
1916 ieee80211_bss_info_change_notify(sdata
, changed
);
1917 sdata_unlock(sdata
);
1919 case NL80211_IFTYPE_OCB
:
1920 changed
|= BSS_CHANGED_OCB
;
1921 ieee80211_bss_info_change_notify(sdata
, changed
);
1923 case NL80211_IFTYPE_ADHOC
:
1924 changed
|= BSS_CHANGED_IBSS
;
1926 case NL80211_IFTYPE_AP
:
1927 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1929 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1930 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1932 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1933 drv_start_ap(local
, sdata
);
1937 case NL80211_IFTYPE_MESH_POINT
:
1938 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1939 changed
|= BSS_CHANGED_BEACON
|
1940 BSS_CHANGED_BEACON_ENABLED
;
1941 ieee80211_bss_info_change_notify(sdata
, changed
);
1944 case NL80211_IFTYPE_WDS
:
1945 case NL80211_IFTYPE_AP_VLAN
:
1946 case NL80211_IFTYPE_MONITOR
:
1947 case NL80211_IFTYPE_P2P_DEVICE
:
1950 case NL80211_IFTYPE_UNSPECIFIED
:
1951 case NUM_NL80211_IFTYPES
:
1952 case NL80211_IFTYPE_P2P_CLIENT
:
1953 case NL80211_IFTYPE_P2P_GO
:
1959 ieee80211_recalc_ps(local
);
1962 * The sta might be in psm against the ap (e.g. because
1963 * this was the state before a hw restart), so we
1964 * explicitly send a null packet in order to make sure
1965 * it'll sync against the ap (and get out of psm).
1967 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1968 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1969 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1971 if (!sdata
->u
.mgd
.associated
)
1974 ieee80211_send_nullfunc(local
, sdata
, false);
1978 /* APs are now beaconing, add back stations */
1979 mutex_lock(&local
->sta_mtx
);
1980 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1981 enum ieee80211_sta_state state
;
1986 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1989 for (state
= IEEE80211_STA_NOTEXIST
;
1990 state
< sta
->sta_state
; state
++)
1991 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1994 mutex_unlock(&local
->sta_mtx
);
1997 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1998 ieee80211_reset_crypto_tx_tailroom(sdata
);
2000 list_for_each_entry(sdata
, &local
->interfaces
, list
)
2001 if (ieee80211_sdata_running(sdata
))
2002 ieee80211_enable_keys(sdata
);
2004 /* Reconfigure sched scan if it was interrupted by FW restart */
2005 mutex_lock(&local
->mtx
);
2006 sched_scan_sdata
= rcu_dereference_protected(local
->sched_scan_sdata
,
2007 lockdep_is_held(&local
->mtx
));
2008 sched_scan_req
= rcu_dereference_protected(local
->sched_scan_req
,
2009 lockdep_is_held(&local
->mtx
));
2010 if (sched_scan_sdata
&& sched_scan_req
)
2012 * Sched scan stopped, but we don't want to report it. Instead,
2013 * we're trying to reschedule. However, if more than one scan
2014 * plan was set, we cannot reschedule since we don't know which
2015 * scan plan was currently running (and some scan plans may have
2016 * already finished).
2018 if (sched_scan_req
->n_scan_plans
> 1 ||
2019 __ieee80211_request_sched_scan_start(sched_scan_sdata
,
2021 sched_scan_stopped
= true;
2022 mutex_unlock(&local
->mtx
);
2024 if (sched_scan_stopped
)
2025 cfg80211_sched_scan_stopped_rtnl(local
->hw
.wiphy
);
2028 local
->in_reconfig
= false;
2031 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
2032 ieee80211_add_virtual_monitor(local
);
2035 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2036 * sessions can be established after a resume.
2038 * Also tear down aggregation sessions since reconfiguring
2039 * them in a hardware restart scenario is not easily done
2040 * right now, and the hardware will have lost information
2041 * about the sessions, but we and the AP still think they
2042 * are active. This is really a workaround though.
2044 if (ieee80211_hw_check(hw
, AMPDU_AGGREGATION
)) {
2045 mutex_lock(&local
->sta_mtx
);
2047 list_for_each_entry(sta
, &local
->sta_list
, list
) {
2048 if (!local
->resuming
)
2049 ieee80211_sta_tear_down_BA_sessions(
2050 sta
, AGG_STOP_LOCAL_REQUEST
);
2051 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
2054 mutex_unlock(&local
->sta_mtx
);
2057 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
2058 IEEE80211_QUEUE_STOP_REASON_SUSPEND
,
2062 * If this is for hw restart things are still running.
2063 * We may want to change that later, however.
2065 if (local
->open_count
&& (!suspended
|| reconfig_due_to_wowlan
))
2066 drv_reconfig_complete(local
, IEEE80211_RECONFIG_TYPE_RESTART
);
2072 /* first set suspended false, then resuming */
2073 local
->suspended
= false;
2075 local
->resuming
= false;
2077 /* It's possible that we don't handle the scan completion in
2078 * time during suspend, so if it's still marked as completed
2079 * here, queue the work and flush it to clean things up.
2080 * Instead of calling the worker function directly here, we
2081 * really queue it to avoid potential races with other flows
2082 * scheduling the same work.
2084 if (test_bit(SCAN_COMPLETED
, &local
->scanning
)) {
2085 ieee80211_queue_delayed_work(&local
->hw
, &local
->scan_work
, 0);
2086 flush_delayed_work(&local
->scan_work
);
2089 if (local
->open_count
&& !reconfig_due_to_wowlan
)
2090 drv_reconfig_complete(local
, IEEE80211_RECONFIG_TYPE_SUSPEND
);
2092 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2093 if (!ieee80211_sdata_running(sdata
))
2095 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2096 ieee80211_sta_restart(sdata
);
2099 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
2107 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
2109 struct ieee80211_sub_if_data
*sdata
;
2110 struct ieee80211_local
*local
;
2111 struct ieee80211_key
*key
;
2116 sdata
= vif_to_sdata(vif
);
2117 local
= sdata
->local
;
2119 if (WARN_ON(!local
->resuming
))
2122 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
2125 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
2127 mutex_lock(&local
->key_mtx
);
2128 list_for_each_entry(key
, &sdata
->key_list
, list
)
2129 key
->flags
|= KEY_FLAG_TAINTED
;
2130 mutex_unlock(&local
->key_mtx
);
2132 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
2134 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
2136 struct ieee80211_local
*local
= sdata
->local
;
2137 struct ieee80211_chanctx_conf
*chanctx_conf
;
2138 struct ieee80211_chanctx
*chanctx
;
2140 mutex_lock(&local
->chanctx_mtx
);
2142 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
2143 lockdep_is_held(&local
->chanctx_mtx
));
2146 * This function can be called from a work, thus it may be possible
2147 * that the chanctx_conf is removed (due to a disconnection, for
2149 * So nothing should be done in such case.
2154 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
2155 ieee80211_recalc_smps_chanctx(local
, chanctx
);
2157 mutex_unlock(&local
->chanctx_mtx
);
2160 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data
*sdata
)
2162 struct ieee80211_local
*local
= sdata
->local
;
2163 struct ieee80211_chanctx_conf
*chanctx_conf
;
2164 struct ieee80211_chanctx
*chanctx
;
2166 mutex_lock(&local
->chanctx_mtx
);
2168 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
2169 lockdep_is_held(&local
->chanctx_mtx
));
2171 if (WARN_ON_ONCE(!chanctx_conf
))
2174 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
2175 ieee80211_recalc_chanctx_min_def(local
, chanctx
);
2177 mutex_unlock(&local
->chanctx_mtx
);
2180 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
2182 size_t pos
= offset
;
2184 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
2185 pos
+= 2 + ies
[pos
+ 1];
2190 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
2194 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
2196 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2200 * Scale up threshold values before storing it, as the RSSI averaging
2201 * algorithm uses a scaled up value as well. Change this scaling
2202 * factor if the RSSI averaging algorithm changes.
2204 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
2205 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
2208 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
2212 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2214 WARN_ON(rssi_min_thold
== rssi_max_thold
||
2215 rssi_min_thold
> rssi_max_thold
);
2217 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
2220 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
2222 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
2224 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2226 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
2228 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
2230 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2235 *pos
++ = WLAN_EID_HT_CAPABILITY
;
2236 *pos
++ = sizeof(struct ieee80211_ht_cap
);
2237 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
2239 /* capability flags */
2240 tmp
= cpu_to_le16(cap
);
2241 memcpy(pos
, &tmp
, sizeof(u16
));
2244 /* AMPDU parameters */
2245 *pos
++ = ht_cap
->ampdu_factor
|
2246 (ht_cap
->ampdu_density
<<
2247 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
2250 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
2251 pos
+= sizeof(ht_cap
->mcs
);
2253 /* extended capabilities */
2254 pos
+= sizeof(__le16
);
2256 /* BF capabilities */
2257 pos
+= sizeof(__le32
);
2259 /* antenna selection */
2265 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
2270 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
2271 *pos
++ = sizeof(struct ieee80211_vht_cap
);
2272 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
2274 /* capability flags */
2275 tmp
= cpu_to_le32(cap
);
2276 memcpy(pos
, &tmp
, sizeof(u32
));
2280 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
2281 pos
+= sizeof(vht_cap
->vht_mcs
);
2286 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2287 const struct cfg80211_chan_def
*chandef
,
2288 u16 prot_mode
, bool rifs_mode
)
2290 struct ieee80211_ht_operation
*ht_oper
;
2291 /* Build HT Information */
2292 *pos
++ = WLAN_EID_HT_OPERATION
;
2293 *pos
++ = sizeof(struct ieee80211_ht_operation
);
2294 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
2295 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
2296 chandef
->chan
->center_freq
);
2297 switch (chandef
->width
) {
2298 case NL80211_CHAN_WIDTH_160
:
2299 case NL80211_CHAN_WIDTH_80P80
:
2300 case NL80211_CHAN_WIDTH_80
:
2301 case NL80211_CHAN_WIDTH_40
:
2302 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
2303 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2305 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2308 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
2311 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
2312 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
2313 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
2314 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
2317 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_RIFS_MODE
;
2319 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
2320 ht_oper
->stbc_param
= 0x0000;
2322 /* It seems that Basic MCS set and Supported MCS set
2323 are identical for the first 10 bytes */
2324 memset(&ht_oper
->basic_set
, 0, 16);
2325 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
2327 return pos
+ sizeof(struct ieee80211_ht_operation
);
2330 u8
*ieee80211_ie_build_vht_oper(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
2331 const struct cfg80211_chan_def
*chandef
)
2333 struct ieee80211_vht_operation
*vht_oper
;
2335 *pos
++ = WLAN_EID_VHT_OPERATION
;
2336 *pos
++ = sizeof(struct ieee80211_vht_operation
);
2337 vht_oper
= (struct ieee80211_vht_operation
*)pos
;
2338 vht_oper
->center_freq_seg1_idx
= ieee80211_frequency_to_channel(
2339 chandef
->center_freq1
);
2340 if (chandef
->center_freq2
)
2341 vht_oper
->center_freq_seg2_idx
=
2342 ieee80211_frequency_to_channel(chandef
->center_freq2
);
2344 vht_oper
->center_freq_seg2_idx
= 0x00;
2346 switch (chandef
->width
) {
2347 case NL80211_CHAN_WIDTH_160
:
2348 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_160MHZ
;
2350 case NL80211_CHAN_WIDTH_80P80
:
2351 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_80P80MHZ
;
2353 case NL80211_CHAN_WIDTH_80
:
2354 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_80MHZ
;
2357 vht_oper
->chan_width
= IEEE80211_VHT_CHANWIDTH_USE_HT
;
2361 /* don't require special VHT peer rates */
2362 vht_oper
->basic_mcs_set
= cpu_to_le16(0xffff);
2364 return pos
+ sizeof(struct ieee80211_vht_operation
);
2367 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2368 const struct ieee80211_ht_operation
*ht_oper
,
2369 struct cfg80211_chan_def
*chandef
)
2371 enum nl80211_channel_type channel_type
;
2374 cfg80211_chandef_create(chandef
, control_chan
,
2375 NL80211_CHAN_NO_HT
);
2379 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2380 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2381 channel_type
= NL80211_CHAN_HT20
;
2383 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2384 channel_type
= NL80211_CHAN_HT40PLUS
;
2386 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2387 channel_type
= NL80211_CHAN_HT40MINUS
;
2390 channel_type
= NL80211_CHAN_NO_HT
;
2393 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2396 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2397 const struct ieee80211_vht_operation
*oper
,
2398 struct cfg80211_chan_def
*chandef
)
2403 chandef
->chan
= control_chan
;
2405 switch (oper
->chan_width
) {
2406 case IEEE80211_VHT_CHANWIDTH_USE_HT
:
2408 case IEEE80211_VHT_CHANWIDTH_80MHZ
:
2409 chandef
->width
= NL80211_CHAN_WIDTH_80
;
2411 case IEEE80211_VHT_CHANWIDTH_160MHZ
:
2412 chandef
->width
= NL80211_CHAN_WIDTH_160
;
2414 case IEEE80211_VHT_CHANWIDTH_80P80MHZ
:
2415 chandef
->width
= NL80211_CHAN_WIDTH_80P80
;
2421 chandef
->center_freq1
=
2422 ieee80211_channel_to_frequency(oper
->center_freq_seg1_idx
,
2423 control_chan
->band
);
2424 chandef
->center_freq2
=
2425 ieee80211_channel_to_frequency(oper
->center_freq_seg2_idx
,
2426 control_chan
->band
);
2429 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2430 const struct ieee80211_supported_band
*sband
,
2431 const u8
*srates
, int srates_len
, u32
*rates
)
2433 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2434 int shift
= ieee80211_chandef_get_shift(chandef
);
2435 struct ieee80211_rate
*br
;
2436 int brate
, rate
, i
, j
, count
= 0;
2440 for (i
= 0; i
< srates_len
; i
++) {
2441 rate
= srates
[i
] & 0x7f;
2443 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2444 br
= &sband
->bitrates
[j
];
2445 if ((rate_flags
& br
->flags
) != rate_flags
)
2448 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2449 if (brate
== rate
) {
2459 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2460 struct sk_buff
*skb
, bool need_basic
,
2461 enum ieee80211_band band
)
2463 struct ieee80211_local
*local
= sdata
->local
;
2464 struct ieee80211_supported_band
*sband
;
2467 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2470 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2471 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2472 sband
= local
->hw
.wiphy
->bands
[band
];
2474 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2475 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2482 if (skb_tailroom(skb
) < rates
+ 2)
2485 pos
= skb_put(skb
, rates
+ 2);
2486 *pos
++ = WLAN_EID_SUPP_RATES
;
2488 for (i
= 0; i
< rates
; i
++) {
2490 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2493 if (need_basic
&& basic_rates
& BIT(i
))
2495 rate
= sband
->bitrates
[i
].bitrate
;
2496 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2498 *pos
++ = basic
| (u8
) rate
;
2504 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2505 struct sk_buff
*skb
, bool need_basic
,
2506 enum ieee80211_band band
)
2508 struct ieee80211_local
*local
= sdata
->local
;
2509 struct ieee80211_supported_band
*sband
;
2511 u8 i
, exrates
, *pos
;
2512 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2515 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2516 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2518 sband
= local
->hw
.wiphy
->bands
[band
];
2520 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2521 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2531 if (skb_tailroom(skb
) < exrates
+ 2)
2535 pos
= skb_put(skb
, exrates
+ 2);
2536 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2538 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2540 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2543 if (need_basic
&& basic_rates
& BIT(i
))
2545 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2547 *pos
++ = basic
| (u8
) rate
;
2553 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2555 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2556 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2558 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2559 /* non-managed type inferfaces */
2562 return -ewma_beacon_signal_read(&ifmgd
->ave_beacon_signal
);
2564 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2566 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2571 /* TODO: consider rx_highest */
2573 if (mcs
->rx_mask
[3])
2575 if (mcs
->rx_mask
[2])
2577 if (mcs
->rx_mask
[1])
2583 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2584 * @local: mac80211 hw info struct
2585 * @status: RX status
2586 * @mpdu_len: total MPDU length (including FCS)
2587 * @mpdu_offset: offset into MPDU to calculate timestamp at
2589 * This function calculates the RX timestamp at the given MPDU offset, taking
2590 * into account what the RX timestamp was. An offset of 0 will just normalize
2591 * the timestamp to TSF at beginning of MPDU reception.
2593 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2594 struct ieee80211_rx_status
*status
,
2595 unsigned int mpdu_len
,
2596 unsigned int mpdu_offset
)
2598 u64 ts
= status
->mactime
;
2599 struct rate_info ri
;
2602 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2605 memset(&ri
, 0, sizeof(ri
));
2607 /* Fill cfg80211 rate info */
2608 if (status
->flag
& RX_FLAG_HT
) {
2609 ri
.mcs
= status
->rate_idx
;
2610 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2611 if (status
->flag
& RX_FLAG_40MHZ
)
2612 ri
.bw
= RATE_INFO_BW_40
;
2614 ri
.bw
= RATE_INFO_BW_20
;
2615 if (status
->flag
& RX_FLAG_SHORT_GI
)
2616 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2617 } else if (status
->flag
& RX_FLAG_VHT
) {
2618 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2619 ri
.mcs
= status
->rate_idx
;
2620 ri
.nss
= status
->vht_nss
;
2621 if (status
->flag
& RX_FLAG_40MHZ
)
2622 ri
.bw
= RATE_INFO_BW_40
;
2623 else if (status
->vht_flag
& RX_VHT_FLAG_80MHZ
)
2624 ri
.bw
= RATE_INFO_BW_80
;
2625 else if (status
->vht_flag
& RX_VHT_FLAG_160MHZ
)
2626 ri
.bw
= RATE_INFO_BW_160
;
2628 ri
.bw
= RATE_INFO_BW_20
;
2629 if (status
->flag
& RX_FLAG_SHORT_GI
)
2630 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2632 struct ieee80211_supported_band
*sband
;
2636 if (status
->flag
& RX_FLAG_10MHZ
) {
2638 ri
.bw
= RATE_INFO_BW_10
;
2639 } else if (status
->flag
& RX_FLAG_5MHZ
) {
2641 ri
.bw
= RATE_INFO_BW_5
;
2643 ri
.bw
= RATE_INFO_BW_20
;
2646 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2647 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2648 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2651 rate
= cfg80211_calculate_bitrate(&ri
);
2652 if (WARN_ONCE(!rate
,
2653 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2654 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2657 /* rewind from end of MPDU */
2658 if (status
->flag
& RX_FLAG_MACTIME_END
)
2659 ts
-= mpdu_len
* 8 * 10 / rate
;
2661 ts
+= mpdu_offset
* 8 * 10 / rate
;
2666 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2668 struct ieee80211_sub_if_data
*sdata
;
2669 struct cfg80211_chan_def chandef
;
2671 mutex_lock(&local
->mtx
);
2672 mutex_lock(&local
->iflist_mtx
);
2673 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2674 /* it might be waiting for the local->mtx, but then
2675 * by the time it gets it, sdata->wdev.cac_started
2676 * will no longer be true
2678 cancel_delayed_work(&sdata
->dfs_cac_timer_work
);
2680 if (sdata
->wdev
.cac_started
) {
2681 chandef
= sdata
->vif
.bss_conf
.chandef
;
2682 ieee80211_vif_release_channel(sdata
);
2683 cfg80211_cac_event(sdata
->dev
,
2685 NL80211_RADAR_CAC_ABORTED
,
2689 mutex_unlock(&local
->iflist_mtx
);
2690 mutex_unlock(&local
->mtx
);
2693 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2695 struct ieee80211_local
*local
=
2696 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2697 struct cfg80211_chan_def chandef
= local
->hw
.conf
.chandef
;
2698 struct ieee80211_chanctx
*ctx
;
2699 int num_chanctx
= 0;
2701 mutex_lock(&local
->chanctx_mtx
);
2702 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
2703 if (ctx
->replace_state
== IEEE80211_CHANCTX_REPLACES_OTHER
)
2707 chandef
= ctx
->conf
.def
;
2709 mutex_unlock(&local
->chanctx_mtx
);
2711 ieee80211_dfs_cac_cancel(local
);
2713 if (num_chanctx
> 1)
2714 /* XXX: multi-channel is not supported yet */
2717 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2720 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2722 struct ieee80211_local
*local
= hw_to_local(hw
);
2724 trace_api_radar_detected(local
);
2726 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2728 EXPORT_SYMBOL(ieee80211_radar_detected
);
2730 u32
ieee80211_chandef_downgrade(struct cfg80211_chan_def
*c
)
2736 case NL80211_CHAN_WIDTH_20
:
2737 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2738 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2740 case NL80211_CHAN_WIDTH_40
:
2741 c
->width
= NL80211_CHAN_WIDTH_20
;
2742 c
->center_freq1
= c
->chan
->center_freq
;
2743 ret
= IEEE80211_STA_DISABLE_40MHZ
|
2744 IEEE80211_STA_DISABLE_VHT
;
2746 case NL80211_CHAN_WIDTH_80
:
2747 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2751 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
2752 c
->width
= NL80211_CHAN_WIDTH_40
;
2753 ret
= IEEE80211_STA_DISABLE_VHT
;
2755 case NL80211_CHAN_WIDTH_80P80
:
2756 c
->center_freq2
= 0;
2757 c
->width
= NL80211_CHAN_WIDTH_80
;
2758 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2759 IEEE80211_STA_DISABLE_160MHZ
;
2761 case NL80211_CHAN_WIDTH_160
:
2763 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2766 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
2767 c
->width
= NL80211_CHAN_WIDTH_80
;
2768 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2769 IEEE80211_STA_DISABLE_160MHZ
;
2772 case NL80211_CHAN_WIDTH_20_NOHT
:
2774 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2775 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2777 case NL80211_CHAN_WIDTH_5
:
2778 case NL80211_CHAN_WIDTH_10
:
2781 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2785 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
2791 * Returns true if smps_mode_new is strictly more restrictive than
2794 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old
,
2795 enum ieee80211_smps_mode smps_mode_new
)
2797 if (WARN_ON_ONCE(smps_mode_old
== IEEE80211_SMPS_AUTOMATIC
||
2798 smps_mode_new
== IEEE80211_SMPS_AUTOMATIC
))
2801 switch (smps_mode_old
) {
2802 case IEEE80211_SMPS_STATIC
:
2804 case IEEE80211_SMPS_DYNAMIC
:
2805 return smps_mode_new
== IEEE80211_SMPS_STATIC
;
2806 case IEEE80211_SMPS_OFF
:
2807 return smps_mode_new
!= IEEE80211_SMPS_OFF
;
2815 int ieee80211_send_action_csa(struct ieee80211_sub_if_data
*sdata
,
2816 struct cfg80211_csa_settings
*csa_settings
)
2818 struct sk_buff
*skb
;
2819 struct ieee80211_mgmt
*mgmt
;
2820 struct ieee80211_local
*local
= sdata
->local
;
2822 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.chan_switch
) +
2823 sizeof(mgmt
->u
.action
.u
.chan_switch
);
2826 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2827 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2830 skb
= dev_alloc_skb(local
->tx_headroom
+ hdr_len
+
2831 5 + /* channel switch announcement element */
2832 3 + /* secondary channel offset element */
2833 8); /* mesh channel switch parameters element */
2837 skb_reserve(skb
, local
->tx_headroom
);
2838 mgmt
= (struct ieee80211_mgmt
*)skb_put(skb
, hdr_len
);
2839 memset(mgmt
, 0, hdr_len
);
2840 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2841 IEEE80211_STYPE_ACTION
);
2843 eth_broadcast_addr(mgmt
->da
);
2844 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2845 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2846 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2848 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2849 memcpy(mgmt
->bssid
, ifibss
->bssid
, ETH_ALEN
);
2851 mgmt
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
2852 mgmt
->u
.action
.u
.chan_switch
.action_code
= WLAN_ACTION_SPCT_CHL_SWITCH
;
2853 pos
= skb_put(skb
, 5);
2854 *pos
++ = WLAN_EID_CHANNEL_SWITCH
; /* EID */
2855 *pos
++ = 3; /* IE length */
2856 *pos
++ = csa_settings
->block_tx
? 1 : 0; /* CSA mode */
2857 freq
= csa_settings
->chandef
.chan
->center_freq
;
2858 *pos
++ = ieee80211_frequency_to_channel(freq
); /* channel */
2859 *pos
++ = csa_settings
->count
; /* count */
2861 if (csa_settings
->chandef
.width
== NL80211_CHAN_WIDTH_40
) {
2862 enum nl80211_channel_type ch_type
;
2865 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
2866 *pos
++ = 1; /* IE length */
2867 ch_type
= cfg80211_get_chandef_type(&csa_settings
->chandef
);
2868 if (ch_type
== NL80211_CHAN_HT40PLUS
)
2869 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2871 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2874 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2875 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2878 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
; /* EID */
2879 *pos
++ = 6; /* IE length */
2880 *pos
++ = sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
; /* Mesh TTL */
2881 *pos
= 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2882 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
2883 *pos
++ |= csa_settings
->block_tx
?
2884 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
2885 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
); /* Reason Cd */
2887 put_unaligned_le16(ifmsh
->pre_value
, pos
);/* Precedence Value */
2891 ieee80211_tx_skb(sdata
, skb
);
2895 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme
*cs
)
2897 return !(cs
== NULL
|| cs
->cipher
== 0 ||
2898 cs
->hdr_len
< cs
->pn_len
+ cs
->pn_off
||
2899 cs
->hdr_len
<= cs
->key_idx_off
||
2900 cs
->key_idx_shift
> 7 ||
2901 cs
->key_idx_mask
== 0);
2904 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme
*cs
, int n
)
2908 /* Ensure we have enough iftype bitmap space for all iftype values */
2909 WARN_ON((NUM_NL80211_IFTYPES
/ 8 + 1) > sizeof(cs
[0].iftype
));
2911 for (i
= 0; i
< n
; i
++)
2912 if (!ieee80211_cs_valid(&cs
[i
]))
2918 const struct ieee80211_cipher_scheme
*
2919 ieee80211_cs_get(struct ieee80211_local
*local
, u32 cipher
,
2920 enum nl80211_iftype iftype
)
2922 const struct ieee80211_cipher_scheme
*l
= local
->hw
.cipher_schemes
;
2923 int n
= local
->hw
.n_cipher_schemes
;
2925 const struct ieee80211_cipher_scheme
*cs
= NULL
;
2927 for (i
= 0; i
< n
; i
++) {
2928 if (l
[i
].cipher
== cipher
) {
2934 if (!cs
|| !(cs
->iftype
& BIT(iftype
)))
2940 int ieee80211_cs_headroom(struct ieee80211_local
*local
,
2941 struct cfg80211_crypto_settings
*crypto
,
2942 enum nl80211_iftype iftype
)
2944 const struct ieee80211_cipher_scheme
*cs
;
2945 int headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2948 for (i
= 0; i
< crypto
->n_ciphers_pairwise
; i
++) {
2949 cs
= ieee80211_cs_get(local
, crypto
->ciphers_pairwise
[i
],
2952 if (cs
&& headroom
< cs
->hdr_len
)
2953 headroom
= cs
->hdr_len
;
2956 cs
= ieee80211_cs_get(local
, crypto
->cipher_group
, iftype
);
2957 if (cs
&& headroom
< cs
->hdr_len
)
2958 headroom
= cs
->hdr_len
;
2964 ieee80211_extend_noa_desc(struct ieee80211_noa_data
*data
, u32 tsf
, int i
)
2966 s32 end
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- (tsf
+ 1);
2973 if (data
->count
[i
] == 1)
2976 if (data
->desc
[i
].interval
== 0)
2979 /* End time is in the past, check for repetitions */
2980 skip
= DIV_ROUND_UP(-end
, data
->desc
[i
].interval
);
2981 if (data
->count
[i
] < 255) {
2982 if (data
->count
[i
] <= skip
) {
2987 data
->count
[i
] -= skip
;
2990 data
->desc
[i
].start
+= skip
* data
->desc
[i
].interval
;
2996 ieee80211_extend_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
,
3002 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
3005 if (!data
->count
[i
])
3008 if (ieee80211_extend_noa_desc(data
, tsf
+ *offset
, i
))
3011 cur
= data
->desc
[i
].start
- tsf
;
3015 cur
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- tsf
;
3024 ieee80211_get_noa_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
)
3029 * arbitrary limit, used to avoid infinite loops when combined NoA
3030 * descriptors cover the full time period.
3034 ieee80211_extend_absent_time(data
, tsf
, &offset
);
3036 if (!ieee80211_extend_absent_time(data
, tsf
, &offset
))
3040 } while (tries
< max_tries
);
3045 void ieee80211_update_p2p_noa(struct ieee80211_noa_data
*data
, u32 tsf
)
3047 u32 next_offset
= BIT(31) - 1;
3051 data
->has_next_tsf
= false;
3052 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
3055 if (!data
->count
[i
])
3058 ieee80211_extend_noa_desc(data
, tsf
, i
);
3059 start
= data
->desc
[i
].start
- tsf
;
3061 data
->absent
|= BIT(i
);
3063 if (next_offset
> start
)
3064 next_offset
= start
;
3066 data
->has_next_tsf
= true;
3070 next_offset
= ieee80211_get_noa_absent_time(data
, tsf
);
3072 data
->next_tsf
= tsf
+ next_offset
;
3074 EXPORT_SYMBOL(ieee80211_update_p2p_noa
);
3076 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr
*attr
,
3077 struct ieee80211_noa_data
*data
, u32 tsf
)
3082 memset(data
, 0, sizeof(*data
));
3084 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
3085 const struct ieee80211_p2p_noa_desc
*desc
= &attr
->desc
[i
];
3087 if (!desc
->count
|| !desc
->duration
)
3090 data
->count
[i
] = desc
->count
;
3091 data
->desc
[i
].start
= le32_to_cpu(desc
->start_time
);
3092 data
->desc
[i
].duration
= le32_to_cpu(desc
->duration
);
3093 data
->desc
[i
].interval
= le32_to_cpu(desc
->interval
);
3095 if (data
->count
[i
] > 1 &&
3096 data
->desc
[i
].interval
< data
->desc
[i
].duration
)
3099 ieee80211_extend_noa_desc(data
, tsf
, i
);
3104 ieee80211_update_p2p_noa(data
, tsf
);
3108 EXPORT_SYMBOL(ieee80211_parse_p2p_noa
);
3110 void ieee80211_recalc_dtim(struct ieee80211_local
*local
,
3111 struct ieee80211_sub_if_data
*sdata
)
3113 u64 tsf
= drv_get_tsf(local
, sdata
);
3115 u16 beacon_int
= sdata
->vif
.bss_conf
.beacon_int
* 1024;
3116 u8 dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
3120 if (tsf
== -1ULL || !beacon_int
|| !dtim_period
)
3123 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
3124 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
3128 ps
= &sdata
->bss
->ps
;
3129 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
3130 ps
= &sdata
->u
.mesh
.ps
;
3136 * actually finds last dtim_count, mac80211 will update in
3137 * __beacon_add_tim().
3138 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3140 do_div(tsf
, beacon_int
);
3141 bcns_from_dtim
= do_div(tsf
, dtim_period
);
3142 /* just had a DTIM */
3143 if (!bcns_from_dtim
)
3146 dtim_count
= dtim_period
- bcns_from_dtim
;
3148 ps
->dtim_count
= dtim_count
;
3151 static u8
ieee80211_chanctx_radar_detect(struct ieee80211_local
*local
,
3152 struct ieee80211_chanctx
*ctx
)
3154 struct ieee80211_sub_if_data
*sdata
;
3155 u8 radar_detect
= 0;
3157 lockdep_assert_held(&local
->chanctx_mtx
);
3159 if (WARN_ON(ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
))
3162 list_for_each_entry(sdata
, &ctx
->reserved_vifs
, reserved_chanctx_list
)
3163 if (sdata
->reserved_radar_required
)
3164 radar_detect
|= BIT(sdata
->reserved_chandef
.width
);
3167 * An in-place reservation context should not have any assigned vifs
3168 * until it replaces the other context.
3170 WARN_ON(ctx
->replace_state
== IEEE80211_CHANCTX_REPLACES_OTHER
&&
3171 !list_empty(&ctx
->assigned_vifs
));
3173 list_for_each_entry(sdata
, &ctx
->assigned_vifs
, assigned_chanctx_list
)
3174 if (sdata
->radar_required
)
3175 radar_detect
|= BIT(sdata
->vif
.bss_conf
.chandef
.width
);
3177 return radar_detect
;
3180 int ieee80211_check_combinations(struct ieee80211_sub_if_data
*sdata
,
3181 const struct cfg80211_chan_def
*chandef
,
3182 enum ieee80211_chanctx_mode chanmode
,
3185 struct ieee80211_local
*local
= sdata
->local
;
3186 struct ieee80211_sub_if_data
*sdata_iter
;
3187 enum nl80211_iftype iftype
= sdata
->wdev
.iftype
;
3188 int num
[NUM_NL80211_IFTYPES
];
3189 struct ieee80211_chanctx
*ctx
;
3190 int num_different_channels
= 0;
3193 lockdep_assert_held(&local
->chanctx_mtx
);
3195 if (WARN_ON(hweight32(radar_detect
) > 1))
3198 if (WARN_ON(chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
3203 num_different_channels
= 1;
3205 if (WARN_ON(iftype
>= NUM_NL80211_IFTYPES
))
3208 /* Always allow software iftypes */
3209 if (local
->hw
.wiphy
->software_iftypes
& BIT(iftype
)) {
3215 memset(num
, 0, sizeof(num
));
3217 if (iftype
!= NL80211_IFTYPE_UNSPECIFIED
)
3220 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
3221 if (ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
)
3223 radar_detect
|= ieee80211_chanctx_radar_detect(local
, ctx
);
3224 if (ctx
->mode
== IEEE80211_CHANCTX_EXCLUSIVE
) {
3225 num_different_channels
++;
3228 if (chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
3229 cfg80211_chandef_compatible(chandef
,
3232 num_different_channels
++;
3235 list_for_each_entry_rcu(sdata_iter
, &local
->interfaces
, list
) {
3236 struct wireless_dev
*wdev_iter
;
3238 wdev_iter
= &sdata_iter
->wdev
;
3240 if (sdata_iter
== sdata
||
3241 !ieee80211_sdata_running(sdata_iter
) ||
3242 local
->hw
.wiphy
->software_iftypes
& BIT(wdev_iter
->iftype
))
3245 num
[wdev_iter
->iftype
]++;
3249 if (total
== 1 && !radar_detect
)
3252 return cfg80211_check_combinations(local
->hw
.wiphy
,
3253 num_different_channels
,
3258 ieee80211_iter_max_chans(const struct ieee80211_iface_combination
*c
,
3261 u32
*max_num_different_channels
= data
;
3263 *max_num_different_channels
= max(*max_num_different_channels
,
3264 c
->num_different_channels
);
3267 int ieee80211_max_num_channels(struct ieee80211_local
*local
)
3269 struct ieee80211_sub_if_data
*sdata
;
3270 int num
[NUM_NL80211_IFTYPES
] = {};
3271 struct ieee80211_chanctx
*ctx
;
3272 int num_different_channels
= 0;
3273 u8 radar_detect
= 0;
3274 u32 max_num_different_channels
= 1;
3277 lockdep_assert_held(&local
->chanctx_mtx
);
3279 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
3280 if (ctx
->replace_state
== IEEE80211_CHANCTX_WILL_BE_REPLACED
)
3283 num_different_channels
++;
3285 radar_detect
|= ieee80211_chanctx_radar_detect(local
, ctx
);
3288 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
3289 num
[sdata
->wdev
.iftype
]++;
3291 err
= cfg80211_iter_combinations(local
->hw
.wiphy
,
3292 num_different_channels
, radar_detect
,
3293 num
, ieee80211_iter_max_chans
,
3294 &max_num_different_channels
);
3298 return max_num_different_channels
;
3301 u8
*ieee80211_add_wmm_info_ie(u8
*buf
, u8 qosinfo
)
3303 *buf
++ = WLAN_EID_VENDOR_SPECIFIC
;
3304 *buf
++ = 7; /* len */
3305 *buf
++ = 0x00; /* Microsoft OUI 00:50:F2 */
3308 *buf
++ = 2; /* WME */
3309 *buf
++ = 0; /* WME info */
3310 *buf
++ = 1; /* WME ver */
3311 *buf
++ = qosinfo
; /* U-APSD no in use */
3316 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data
*sdata
,
3317 struct sta_info
*sta
,
3318 struct txq_info
*txqi
, int tid
)
3320 skb_queue_head_init(&txqi
->queue
);
3321 txqi
->txq
.vif
= &sdata
->vif
;
3324 txqi
->txq
.sta
= &sta
->sta
;
3325 sta
->sta
.txq
[tid
] = &txqi
->txq
;
3326 txqi
->txq
.tid
= tid
;
3327 txqi
->txq
.ac
= ieee802_1d_to_ac
[tid
& 7];
3329 sdata
->vif
.txq
= &txqi
->txq
;
3331 txqi
->txq
.ac
= IEEE80211_AC_BE
;