2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 void *mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
39 struct ieee80211_hw
*wiphy_to_ieee80211_hw(struct wiphy
*wiphy
)
41 struct ieee80211_local
*local
;
44 local
= wiphy_priv(wiphy
);
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw
);
49 u8
*ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
,
50 enum nl80211_iftype type
)
52 __le16 fc
= hdr
->frame_control
;
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
58 if (ieee80211_is_data(fc
)) {
59 if (len
< 24) /* drop incorrect hdr len (data) */
62 if (ieee80211_has_a4(fc
))
64 if (ieee80211_has_tods(fc
))
66 if (ieee80211_has_fromds(fc
))
72 if (ieee80211_is_mgmt(fc
)) {
73 if (len
< 24) /* drop incorrect hdr len (mgmt) */
78 if (ieee80211_is_ctl(fc
)) {
79 if (ieee80211_is_pspoll(fc
))
82 if (ieee80211_is_back_req(fc
)) {
84 case NL80211_IFTYPE_STATION
:
86 case NL80211_IFTYPE_AP
:
87 case NL80211_IFTYPE_AP_VLAN
:
90 break; /* fall through to the return */
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
101 struct ieee80211_hdr
*hdr
;
103 skb_queue_walk(&tx
->skbs
, skb
) {
104 hdr
= (struct ieee80211_hdr
*) skb
->data
;
105 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
109 int ieee80211_frame_duration(enum ieee80211_band band
, size_t len
,
110 int rate
, int erp
, int short_preamble
,
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
127 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
141 dur
= 16; /* SIFS + signal ext */
142 dur
+= 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur
+= 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
154 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
155 4 * rate
); /* T_SYM x N_SYM */
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 dur
= 10; /* aSIFSTime = 10 usec */
168 dur
+= short_preamble
? (72 + 24) : (144 + 48);
170 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
176 /* Exported duration function for driver use */
177 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
178 struct ieee80211_vif
*vif
,
179 enum ieee80211_band band
,
181 struct ieee80211_rate
*rate
)
183 struct ieee80211_sub_if_data
*sdata
;
186 bool short_preamble
= false;
190 sdata
= vif_to_sdata(vif
);
191 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
192 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
193 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
194 shift
= ieee80211_vif_get_shift(vif
);
197 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
198 short_preamble
, shift
);
200 return cpu_to_le16(dur
);
202 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
204 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
205 struct ieee80211_vif
*vif
, size_t frame_len
,
206 const struct ieee80211_tx_info
*frame_txctl
)
208 struct ieee80211_local
*local
= hw_to_local(hw
);
209 struct ieee80211_rate
*rate
;
210 struct ieee80211_sub_if_data
*sdata
;
212 int erp
, shift
= 0, bitrate
;
214 struct ieee80211_supported_band
*sband
;
216 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
218 short_preamble
= false;
220 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
224 sdata
= vif_to_sdata(vif
);
225 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
226 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
227 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
228 shift
= ieee80211_vif_get_shift(vif
);
231 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
234 dur
= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
235 erp
, short_preamble
, shift
);
236 /* Data frame duration */
237 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
238 erp
, short_preamble
, shift
);
240 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
241 erp
, short_preamble
, shift
);
243 return cpu_to_le16(dur
);
245 EXPORT_SYMBOL(ieee80211_rts_duration
);
247 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
248 struct ieee80211_vif
*vif
,
250 const struct ieee80211_tx_info
*frame_txctl
)
252 struct ieee80211_local
*local
= hw_to_local(hw
);
253 struct ieee80211_rate
*rate
;
254 struct ieee80211_sub_if_data
*sdata
;
256 int erp
, shift
= 0, bitrate
;
258 struct ieee80211_supported_band
*sband
;
260 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
262 short_preamble
= false;
264 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
267 sdata
= vif_to_sdata(vif
);
268 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
269 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
270 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
271 shift
= ieee80211_vif_get_shift(vif
);
274 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
276 /* Data frame duration */
277 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
278 erp
, short_preamble
, shift
);
279 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
281 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
282 erp
, short_preamble
, shift
);
285 return cpu_to_le16(dur
);
287 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
289 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
291 struct ieee80211_sub_if_data
*sdata
;
292 int n_acs
= IEEE80211_NUM_ACS
;
294 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
297 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
303 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
304 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
307 for (ac
= 0; ac
< n_acs
; ac
++) {
308 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
310 if (ac_queue
== queue
||
311 (sdata
->vif
.cab_queue
== queue
&&
312 local
->queue_stop_reasons
[ac_queue
] == 0 &&
313 skb_queue_empty(&local
->pending
[ac_queue
])))
314 netif_wake_subqueue(sdata
->dev
, ac
);
319 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
320 enum queue_stop_reason reason
)
322 struct ieee80211_local
*local
= hw_to_local(hw
);
324 trace_wake_queue(local
, queue
, reason
);
326 if (WARN_ON(queue
>= hw
->queues
))
329 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
332 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
334 if (local
->queue_stop_reasons
[queue
] != 0)
335 /* someone still has this queue stopped */
338 if (skb_queue_empty(&local
->pending
[queue
])) {
340 ieee80211_propagate_queue_wake(local
, queue
);
343 tasklet_schedule(&local
->tx_pending_tasklet
);
346 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
347 enum queue_stop_reason reason
)
349 struct ieee80211_local
*local
= hw_to_local(hw
);
352 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
353 __ieee80211_wake_queue(hw
, queue
, reason
);
354 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
357 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
359 ieee80211_wake_queue_by_reason(hw
, queue
,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
362 EXPORT_SYMBOL(ieee80211_wake_queue
);
364 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
365 enum queue_stop_reason reason
)
367 struct ieee80211_local
*local
= hw_to_local(hw
);
368 struct ieee80211_sub_if_data
*sdata
;
369 int n_acs
= IEEE80211_NUM_ACS
;
371 trace_stop_queue(local
, queue
, reason
);
373 if (WARN_ON(queue
>= hw
->queues
))
376 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
379 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
381 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
385 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
391 for (ac
= 0; ac
< n_acs
; ac
++) {
392 if (sdata
->vif
.hw_queue
[ac
] == queue
||
393 sdata
->vif
.cab_queue
== queue
)
394 netif_stop_subqueue(sdata
->dev
, ac
);
400 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
401 enum queue_stop_reason reason
)
403 struct ieee80211_local
*local
= hw_to_local(hw
);
406 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
407 __ieee80211_stop_queue(hw
, queue
, reason
);
408 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
411 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
413 ieee80211_stop_queue_by_reason(hw
, queue
,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
416 EXPORT_SYMBOL(ieee80211_stop_queue
);
418 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
421 struct ieee80211_hw
*hw
= &local
->hw
;
423 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
424 int queue
= info
->hw_queue
;
426 if (WARN_ON(!info
->control
.vif
)) {
427 ieee80211_free_txskb(&local
->hw
, skb
);
431 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
432 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
433 __skb_queue_tail(&local
->pending
[queue
], skb
);
434 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
435 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
438 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
439 struct sk_buff_head
*skbs
,
440 void (*fn
)(void *data
), void *data
)
442 struct ieee80211_hw
*hw
= &local
->hw
;
447 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
448 while ((skb
= skb_dequeue(skbs
))) {
449 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
451 if (WARN_ON(!info
->control
.vif
)) {
452 ieee80211_free_txskb(&local
->hw
, skb
);
456 queue
= info
->hw_queue
;
458 __ieee80211_stop_queue(hw
, queue
,
459 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
461 __skb_queue_tail(&local
->pending
[queue
], skb
);
467 for (i
= 0; i
< hw
->queues
; i
++)
468 __ieee80211_wake_queue(hw
, i
,
469 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
470 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
473 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
474 unsigned long queues
,
475 enum queue_stop_reason reason
)
477 struct ieee80211_local
*local
= hw_to_local(hw
);
481 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
483 for_each_set_bit(i
, &queues
, hw
->queues
)
484 __ieee80211_stop_queue(hw
, i
, reason
);
486 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
489 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
491 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
492 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
494 EXPORT_SYMBOL(ieee80211_stop_queues
);
496 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
498 struct ieee80211_local
*local
= hw_to_local(hw
);
502 if (WARN_ON(queue
>= hw
->queues
))
505 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
506 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
507 &local
->queue_stop_reasons
[queue
]);
508 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
511 EXPORT_SYMBOL(ieee80211_queue_stopped
);
513 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
514 unsigned long queues
,
515 enum queue_stop_reason reason
)
517 struct ieee80211_local
*local
= hw_to_local(hw
);
521 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
523 for_each_set_bit(i
, &queues
, hw
->queues
)
524 __ieee80211_wake_queue(hw
, i
, reason
);
526 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
529 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
531 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
532 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
534 EXPORT_SYMBOL(ieee80211_wake_queues
);
536 void ieee80211_flush_queues(struct ieee80211_local
*local
,
537 struct ieee80211_sub_if_data
*sdata
)
541 if (!local
->ops
->flush
)
544 if (sdata
&& local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
549 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
550 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
551 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
552 queues
|= BIT(sdata
->vif
.cab_queue
);
555 queues
= BIT(local
->hw
.queues
) - 1;
558 ieee80211_stop_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
559 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
561 drv_flush(local
, queues
, false);
563 ieee80211_wake_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
564 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
567 static void __iterate_active_interfaces(struct ieee80211_local
*local
,
569 void (*iterator
)(void *data
, u8
*mac
,
570 struct ieee80211_vif
*vif
),
573 struct ieee80211_sub_if_data
*sdata
;
575 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
576 switch (sdata
->vif
.type
) {
577 case NL80211_IFTYPE_MONITOR
:
578 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
581 case NL80211_IFTYPE_AP_VLAN
:
586 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
587 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
589 if (ieee80211_sdata_running(sdata
))
590 iterator(data
, sdata
->vif
.addr
,
594 sdata
= rcu_dereference_check(local
->monitor_sdata
,
595 lockdep_is_held(&local
->iflist_mtx
) ||
596 lockdep_rtnl_is_held());
598 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
599 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
600 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
603 void ieee80211_iterate_active_interfaces(
604 struct ieee80211_hw
*hw
, u32 iter_flags
,
605 void (*iterator
)(void *data
, u8
*mac
,
606 struct ieee80211_vif
*vif
),
609 struct ieee80211_local
*local
= hw_to_local(hw
);
611 mutex_lock(&local
->iflist_mtx
);
612 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
613 mutex_unlock(&local
->iflist_mtx
);
615 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
617 void ieee80211_iterate_active_interfaces_atomic(
618 struct ieee80211_hw
*hw
, u32 iter_flags
,
619 void (*iterator
)(void *data
, u8
*mac
,
620 struct ieee80211_vif
*vif
),
623 struct ieee80211_local
*local
= hw_to_local(hw
);
626 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
629 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
631 void ieee80211_iterate_active_interfaces_rtnl(
632 struct ieee80211_hw
*hw
, u32 iter_flags
,
633 void (*iterator
)(void *data
, u8
*mac
,
634 struct ieee80211_vif
*vif
),
637 struct ieee80211_local
*local
= hw_to_local(hw
);
641 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
643 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl
);
645 struct ieee80211_vif
*wdev_to_ieee80211_vif(struct wireless_dev
*wdev
)
647 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
649 if (!ieee80211_sdata_running(sdata
) ||
650 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
654 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif
);
657 * Nothing should have been stuffed into the workqueue during
658 * the suspend->resume cycle. If this WARN is seen then there
659 * is a bug with either the driver suspend or something in
660 * mac80211 stuffing into the workqueue which we haven't yet
661 * cleared during mac80211's suspend cycle.
663 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
665 if (WARN(local
->suspended
&& !local
->resuming
,
666 "queueing ieee80211 work while going to suspend\n"))
672 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
674 struct ieee80211_local
*local
= hw_to_local(hw
);
676 if (!ieee80211_can_queue_work(local
))
679 queue_work(local
->workqueue
, work
);
681 EXPORT_SYMBOL(ieee80211_queue_work
);
683 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
684 struct delayed_work
*dwork
,
687 struct ieee80211_local
*local
= hw_to_local(hw
);
689 if (!ieee80211_can_queue_work(local
))
692 queue_delayed_work(local
->workqueue
, dwork
, delay
);
694 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
696 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
697 struct ieee802_11_elems
*elems
,
701 const u8
*pos
= start
;
702 bool calc_crc
= filter
!= 0;
703 DECLARE_BITMAP(seen_elems
, 256);
706 bitmap_zero(seen_elems
, 256);
707 memset(elems
, 0, sizeof(*elems
));
708 elems
->ie_start
= start
;
709 elems
->total_len
= len
;
713 bool elem_parse_failed
;
720 elems
->parse_error
= true;
726 case WLAN_EID_SUPP_RATES
:
727 case WLAN_EID_FH_PARAMS
:
728 case WLAN_EID_DS_PARAMS
:
729 case WLAN_EID_CF_PARAMS
:
731 case WLAN_EID_IBSS_PARAMS
:
732 case WLAN_EID_CHALLENGE
:
734 case WLAN_EID_ERP_INFO
:
735 case WLAN_EID_EXT_SUPP_RATES
:
736 case WLAN_EID_HT_CAPABILITY
:
737 case WLAN_EID_HT_OPERATION
:
738 case WLAN_EID_VHT_CAPABILITY
:
739 case WLAN_EID_VHT_OPERATION
:
740 case WLAN_EID_MESH_ID
:
741 case WLAN_EID_MESH_CONFIG
:
742 case WLAN_EID_PEER_MGMT
:
747 case WLAN_EID_CHANNEL_SWITCH
:
748 case WLAN_EID_EXT_CHANSWITCH_ANN
:
749 case WLAN_EID_COUNTRY
:
750 case WLAN_EID_PWR_CONSTRAINT
:
751 case WLAN_EID_TIMEOUT_INTERVAL
:
752 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
753 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
754 case WLAN_EID_CHAN_SWITCH_PARAM
:
756 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
757 * that if the content gets bigger it might be needed more than once
759 if (test_bit(id
, seen_elems
)) {
760 elems
->parse_error
= true;
768 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
769 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
771 elem_parse_failed
= false;
776 elems
->ssid_len
= elen
;
778 case WLAN_EID_SUPP_RATES
:
779 elems
->supp_rates
= pos
;
780 elems
->supp_rates_len
= elen
;
782 case WLAN_EID_DS_PARAMS
:
784 elems
->ds_params
= pos
;
786 elem_parse_failed
= true;
789 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
790 elems
->tim
= (void *)pos
;
791 elems
->tim_len
= elen
;
793 elem_parse_failed
= true;
795 case WLAN_EID_CHALLENGE
:
796 elems
->challenge
= pos
;
797 elems
->challenge_len
= elen
;
799 case WLAN_EID_VENDOR_SPECIFIC
:
800 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
802 /* Microsoft OUI (00:50:F2) */
805 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
807 if (elen
>= 5 && pos
[3] == 2) {
808 /* OUI Type 2 - WMM IE */
810 elems
->wmm_info
= pos
;
811 elems
->wmm_info_len
= elen
;
812 } else if (pos
[4] == 1) {
813 elems
->wmm_param
= pos
;
814 elems
->wmm_param_len
= elen
;
821 elems
->rsn_len
= elen
;
823 case WLAN_EID_ERP_INFO
:
825 elems
->erp_info
= pos
;
827 elem_parse_failed
= true;
829 case WLAN_EID_EXT_SUPP_RATES
:
830 elems
->ext_supp_rates
= pos
;
831 elems
->ext_supp_rates_len
= elen
;
833 case WLAN_EID_HT_CAPABILITY
:
834 if (elen
>= sizeof(struct ieee80211_ht_cap
))
835 elems
->ht_cap_elem
= (void *)pos
;
837 elem_parse_failed
= true;
839 case WLAN_EID_HT_OPERATION
:
840 if (elen
>= sizeof(struct ieee80211_ht_operation
))
841 elems
->ht_operation
= (void *)pos
;
843 elem_parse_failed
= true;
845 case WLAN_EID_VHT_CAPABILITY
:
846 if (elen
>= sizeof(struct ieee80211_vht_cap
))
847 elems
->vht_cap_elem
= (void *)pos
;
849 elem_parse_failed
= true;
851 case WLAN_EID_VHT_OPERATION
:
852 if (elen
>= sizeof(struct ieee80211_vht_operation
))
853 elems
->vht_operation
= (void *)pos
;
855 elem_parse_failed
= true;
857 case WLAN_EID_OPMODE_NOTIF
:
859 elems
->opmode_notif
= pos
;
861 elem_parse_failed
= true;
863 case WLAN_EID_MESH_ID
:
864 elems
->mesh_id
= pos
;
865 elems
->mesh_id_len
= elen
;
867 case WLAN_EID_MESH_CONFIG
:
868 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
869 elems
->mesh_config
= (void *)pos
;
871 elem_parse_failed
= true;
873 case WLAN_EID_PEER_MGMT
:
874 elems
->peering
= pos
;
875 elems
->peering_len
= elen
;
877 case WLAN_EID_MESH_AWAKE_WINDOW
:
879 elems
->awake_window
= (void *)pos
;
883 elems
->preq_len
= elen
;
887 elems
->prep_len
= elen
;
891 elems
->perr_len
= elen
;
894 if (elen
>= sizeof(struct ieee80211_rann_ie
))
895 elems
->rann
= (void *)pos
;
897 elem_parse_failed
= true;
899 case WLAN_EID_CHANNEL_SWITCH
:
900 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
901 elem_parse_failed
= true;
904 elems
->ch_switch_ie
= (void *)pos
;
906 case WLAN_EID_EXT_CHANSWITCH_ANN
:
907 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
908 elem_parse_failed
= true;
911 elems
->ext_chansw_ie
= (void *)pos
;
913 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
914 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
915 elem_parse_failed
= true;
918 elems
->sec_chan_offs
= (void *)pos
;
920 case WLAN_EID_CHAN_SWITCH_PARAM
:
922 sizeof(*elems
->mesh_chansw_params_ie
)) {
923 elem_parse_failed
= true;
926 elems
->mesh_chansw_params_ie
= (void *)pos
;
928 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
930 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
931 elem_parse_failed
= true;
934 elems
->wide_bw_chansw_ie
= (void *)pos
;
936 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
938 elem_parse_failed
= true;
942 * This is a bit tricky, but as we only care about
943 * the wide bandwidth channel switch element, so
944 * just parse it out manually.
946 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
949 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
950 elems
->wide_bw_chansw_ie
=
953 elem_parse_failed
= true;
956 case WLAN_EID_COUNTRY
:
957 elems
->country_elem
= pos
;
958 elems
->country_elem_len
= elen
;
960 case WLAN_EID_PWR_CONSTRAINT
:
962 elem_parse_failed
= true;
965 elems
->pwr_constr_elem
= pos
;
967 case WLAN_EID_TIMEOUT_INTERVAL
:
968 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
969 elems
->timeout_int
= (void *)pos
;
971 elem_parse_failed
= true;
977 if (elem_parse_failed
)
978 elems
->parse_error
= true;
980 __set_bit(id
, seen_elems
);
987 elems
->parse_error
= true;
992 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
995 struct ieee80211_local
*local
= sdata
->local
;
996 struct ieee80211_tx_queue_params qparam
;
997 struct ieee80211_chanctx_conf
*chanctx_conf
;
999 bool use_11b
, enable_qos
;
1002 if (!local
->ops
->conf_tx
)
1005 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1008 memset(&qparam
, 0, sizeof(qparam
));
1011 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1012 use_11b
= (chanctx_conf
&&
1013 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1014 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1018 * By default disable QoS in STA mode for old access points, which do
1019 * not support 802.11e. New APs will provide proper queue parameters,
1020 * that we will configure later.
1022 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
1024 /* Set defaults according to 802.11-2007 Table 7-37 */
1031 /* Confiure old 802.11b/g medium access rules. */
1032 qparam
.cw_max
= aCWmax
;
1033 qparam
.cw_min
= aCWmin
;
1037 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1038 /* Update if QoS is enabled. */
1041 case IEEE80211_AC_BK
:
1042 qparam
.cw_max
= aCWmax
;
1043 qparam
.cw_min
= aCWmin
;
1047 /* never happens but let's not leave undefined */
1049 case IEEE80211_AC_BE
:
1050 qparam
.cw_max
= aCWmax
;
1051 qparam
.cw_min
= aCWmin
;
1055 case IEEE80211_AC_VI
:
1056 qparam
.cw_max
= aCWmin
;
1057 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1059 qparam
.txop
= 6016/32;
1061 qparam
.txop
= 3008/32;
1064 case IEEE80211_AC_VO
:
1065 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1066 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1068 qparam
.txop
= 3264/32;
1070 qparam
.txop
= 1504/32;
1076 qparam
.uapsd
= false;
1078 sdata
->tx_conf
[ac
] = qparam
;
1079 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1082 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1083 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1084 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1086 ieee80211_bss_info_change_notify(sdata
,
1091 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1092 u16 transaction
, u16 auth_alg
, u16 status
,
1093 const u8
*extra
, size_t extra_len
, const u8
*da
,
1094 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1097 struct ieee80211_local
*local
= sdata
->local
;
1098 struct sk_buff
*skb
;
1099 struct ieee80211_mgmt
*mgmt
;
1102 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1103 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24 + 6 + extra_len
);
1107 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1109 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1110 memset(mgmt
, 0, 24 + 6);
1111 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1112 IEEE80211_STYPE_AUTH
);
1113 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1114 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1115 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1116 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1117 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1118 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1120 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1122 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1123 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1124 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1128 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1130 ieee80211_tx_skb(sdata
, skb
);
1133 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1134 const u8
*bssid
, u16 stype
, u16 reason
,
1135 bool send_frame
, u8
*frame_buf
)
1137 struct ieee80211_local
*local
= sdata
->local
;
1138 struct sk_buff
*skb
;
1139 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1142 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1143 mgmt
->duration
= 0; /* initialize only */
1144 mgmt
->seq_ctrl
= 0; /* initialize only */
1145 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1146 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1147 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1148 /* u.deauth.reason_code == u.disassoc.reason_code */
1149 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1152 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1153 IEEE80211_DEAUTH_FRAME_LEN
);
1157 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1160 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1161 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1163 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1164 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1165 IEEE80211_SKB_CB(skb
)->flags
|=
1166 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1168 ieee80211_tx_skb(sdata
, skb
);
1172 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1173 size_t buffer_len
, const u8
*ie
, size_t ie_len
,
1174 enum ieee80211_band band
, u32 rate_mask
,
1175 struct cfg80211_chan_def
*chandef
)
1177 struct ieee80211_supported_band
*sband
;
1178 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1179 size_t offset
= 0, noffset
;
1180 int supp_rates_len
, i
;
1187 sband
= local
->hw
.wiphy
->bands
[band
];
1188 if (WARN_ON_ONCE(!sband
))
1191 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1192 shift
= ieee80211_chandef_get_shift(chandef
);
1195 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1196 if ((BIT(i
) & rate_mask
) == 0)
1197 continue; /* skip rate */
1198 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1201 rates
[num_rates
++] =
1202 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1206 supp_rates_len
= min_t(int, num_rates
, 8);
1208 if (end
- pos
< 2 + supp_rates_len
)
1210 *pos
++ = WLAN_EID_SUPP_RATES
;
1211 *pos
++ = supp_rates_len
;
1212 memcpy(pos
, rates
, supp_rates_len
);
1213 pos
+= supp_rates_len
;
1215 /* insert "request information" if in custom IEs */
1217 static const u8 before_extrates
[] = {
1219 WLAN_EID_SUPP_RATES
,
1222 noffset
= ieee80211_ie_split(ie
, ie_len
,
1224 ARRAY_SIZE(before_extrates
),
1226 if (end
- pos
< noffset
- offset
)
1228 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1229 pos
+= noffset
- offset
;
1233 ext_rates_len
= num_rates
- supp_rates_len
;
1234 if (ext_rates_len
> 0) {
1235 if (end
- pos
< 2 + ext_rates_len
)
1237 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1238 *pos
++ = ext_rates_len
;
1239 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1240 pos
+= ext_rates_len
;
1243 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1246 *pos
++ = WLAN_EID_DS_PARAMS
;
1248 *pos
++ = ieee80211_frequency_to_channel(
1249 chandef
->chan
->center_freq
);
1252 /* insert custom IEs that go before HT */
1254 static const u8 before_ht
[] = {
1256 WLAN_EID_SUPP_RATES
,
1258 WLAN_EID_EXT_SUPP_RATES
,
1260 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1262 noffset
= ieee80211_ie_split(ie
, ie_len
,
1263 before_ht
, ARRAY_SIZE(before_ht
),
1265 if (end
- pos
< noffset
- offset
)
1267 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1268 pos
+= noffset
- offset
;
1272 if (sband
->ht_cap
.ht_supported
) {
1273 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1275 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1280 * If adding more here, adjust code in main.c
1281 * that calculates local->scan_ies_len.
1284 /* add any remaining custom IEs */
1287 if (end
- pos
< noffset
- offset
)
1289 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1290 pos
+= noffset
- offset
;
1293 if (sband
->vht_cap
.vht_supported
) {
1294 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1296 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1297 sband
->vht_cap
.cap
);
1300 return pos
- buffer
;
1302 WARN_ONCE(1, "not enough space for preq IEs\n");
1303 return pos
- buffer
;
1306 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1307 u8
*dst
, u32 ratemask
,
1308 struct ieee80211_channel
*chan
,
1309 const u8
*ssid
, size_t ssid_len
,
1310 const u8
*ie
, size_t ie_len
,
1313 struct ieee80211_local
*local
= sdata
->local
;
1314 struct cfg80211_chan_def chandef
;
1315 struct sk_buff
*skb
;
1316 struct ieee80211_mgmt
*mgmt
;
1320 * Do not send DS Channel parameter for directed probe requests
1321 * in order to maximize the chance that we get a response. Some
1322 * badly-behaved APs don't respond when this parameter is included.
1324 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1326 chandef
.chan
= NULL
;
1328 chandef
.chan
= chan
;
1330 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1331 ssid
, ssid_len
, 100 + ie_len
);
1335 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1337 ie
, ie_len
, chan
->band
,
1338 ratemask
, &chandef
);
1339 skb_put(skb
, ies_len
);
1342 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1343 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1344 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1347 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1352 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1353 const u8
*ssid
, size_t ssid_len
,
1354 const u8
*ie
, size_t ie_len
,
1355 u32 ratemask
, bool directed
, u32 tx_flags
,
1356 struct ieee80211_channel
*channel
, bool scan
)
1358 struct sk_buff
*skb
;
1360 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, channel
,
1362 ie
, ie_len
, directed
);
1364 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1366 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1368 ieee80211_tx_skb(sdata
, skb
);
1372 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1373 struct ieee802_11_elems
*elems
,
1374 enum ieee80211_band band
, u32
*basic_rates
)
1376 struct ieee80211_supported_band
*sband
;
1377 struct ieee80211_rate
*bitrates
;
1379 u32 supp_rates
, rate_flags
;
1381 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1383 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1384 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1386 if (WARN_ON(!sband
))
1389 bitrates
= sband
->bitrates
;
1390 num_rates
= sband
->n_bitrates
;
1392 for (i
= 0; i
< elems
->supp_rates_len
+
1393 elems
->ext_supp_rates_len
; i
++) {
1397 if (i
< elems
->supp_rates_len
)
1398 rate
= elems
->supp_rates
[i
];
1399 else if (elems
->ext_supp_rates
)
1400 rate
= elems
->ext_supp_rates
1401 [i
- elems
->supp_rates_len
];
1402 own_rate
= 5 * (rate
& 0x7f);
1403 is_basic
= !!(rate
& 0x80);
1405 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1408 for (j
= 0; j
< num_rates
; j
++) {
1410 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1414 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1417 if (brate
== own_rate
) {
1418 supp_rates
|= BIT(j
);
1419 if (basic_rates
&& is_basic
)
1420 *basic_rates
|= BIT(j
);
1427 void ieee80211_stop_device(struct ieee80211_local
*local
)
1429 ieee80211_led_radio(local
, false);
1430 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1432 cancel_work_sync(&local
->reconfig_filter
);
1434 flush_workqueue(local
->workqueue
);
1438 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1439 struct ieee80211_sub_if_data
*sdata
)
1441 struct ieee80211_chanctx_conf
*conf
;
1442 struct ieee80211_chanctx
*ctx
;
1444 if (!local
->use_chanctx
)
1447 mutex_lock(&local
->chanctx_mtx
);
1448 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1449 lockdep_is_held(&local
->chanctx_mtx
));
1451 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1452 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1454 mutex_unlock(&local
->chanctx_mtx
);
1457 int ieee80211_reconfig(struct ieee80211_local
*local
)
1459 struct ieee80211_hw
*hw
= &local
->hw
;
1460 struct ieee80211_sub_if_data
*sdata
;
1461 struct ieee80211_chanctx
*ctx
;
1462 struct sta_info
*sta
;
1464 bool reconfig_due_to_wowlan
= false;
1465 struct ieee80211_sub_if_data
*sched_scan_sdata
;
1466 bool sched_scan_stopped
= false;
1469 if (local
->suspended
)
1470 local
->resuming
= true;
1472 if (local
->wowlan
) {
1473 res
= drv_resume(local
);
1474 local
->wowlan
= false;
1476 local
->resuming
= false;
1483 * res is 1, which means the driver requested
1484 * to go through a regular reset on wakeup.
1486 reconfig_due_to_wowlan
= true;
1489 /* everything else happens only if HW was up & running */
1490 if (!local
->open_count
)
1494 * Upon resume hardware can sometimes be goofy due to
1495 * various platform / driver / bus issues, so restarting
1496 * the device may at times not work immediately. Propagate
1499 res
= drv_start(local
);
1501 WARN(local
->suspended
, "Hardware became unavailable "
1502 "upon resume. This could be a software issue "
1503 "prior to suspend or a hardware issue.\n");
1507 /* setup fragmentation threshold */
1508 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1510 /* setup RTS threshold */
1511 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1513 /* reset coverage class */
1514 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1516 ieee80211_led_radio(local
, true);
1517 ieee80211_mod_tpt_led_trig(local
,
1518 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1520 /* add interfaces */
1521 sdata
= rtnl_dereference(local
->monitor_sdata
);
1523 /* in HW restart it exists already */
1524 WARN_ON(local
->resuming
);
1525 res
= drv_add_interface(local
, sdata
);
1527 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
1533 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1534 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1535 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1536 ieee80211_sdata_running(sdata
))
1537 res
= drv_add_interface(local
, sdata
);
1540 /* add channel contexts */
1541 if (local
->use_chanctx
) {
1542 mutex_lock(&local
->chanctx_mtx
);
1543 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1544 WARN_ON(drv_add_chanctx(local
, ctx
));
1545 mutex_unlock(&local
->chanctx_mtx
);
1548 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1549 if (!ieee80211_sdata_running(sdata
))
1551 ieee80211_assign_chanctx(local
, sdata
);
1554 sdata
= rtnl_dereference(local
->monitor_sdata
);
1555 if (sdata
&& ieee80211_sdata_running(sdata
))
1556 ieee80211_assign_chanctx(local
, sdata
);
1559 mutex_lock(&local
->sta_mtx
);
1560 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1561 enum ieee80211_sta_state state
;
1566 /* AP-mode stations will be added later */
1567 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1570 for (state
= IEEE80211_STA_NOTEXIST
;
1571 state
< sta
->sta_state
; state
++)
1572 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1575 mutex_unlock(&local
->sta_mtx
);
1577 /* reconfigure tx conf */
1578 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1579 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1580 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1581 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1582 !ieee80211_sdata_running(sdata
))
1585 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1586 drv_conf_tx(local
, sdata
, i
,
1587 &sdata
->tx_conf
[i
]);
1591 /* reconfigure hardware */
1592 ieee80211_hw_config(local
, ~0);
1594 ieee80211_configure_filter(local
);
1596 /* Finally also reconfigure all the BSS information */
1597 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1600 if (!ieee80211_sdata_running(sdata
))
1603 /* common change flags for all interface types */
1604 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1605 BSS_CHANGED_ERP_PREAMBLE
|
1606 BSS_CHANGED_ERP_SLOT
|
1608 BSS_CHANGED_BASIC_RATES
|
1609 BSS_CHANGED_BEACON_INT
|
1614 BSS_CHANGED_TXPOWER
;
1616 switch (sdata
->vif
.type
) {
1617 case NL80211_IFTYPE_STATION
:
1618 changed
|= BSS_CHANGED_ASSOC
|
1619 BSS_CHANGED_ARP_FILTER
|
1622 /* Re-send beacon info report to the driver */
1623 if (sdata
->u
.mgd
.have_beacon
)
1624 changed
|= BSS_CHANGED_BEACON_INFO
;
1627 ieee80211_bss_info_change_notify(sdata
, changed
);
1628 sdata_unlock(sdata
);
1630 case NL80211_IFTYPE_ADHOC
:
1631 changed
|= BSS_CHANGED_IBSS
;
1633 case NL80211_IFTYPE_AP
:
1634 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1636 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1637 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1639 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1640 drv_start_ap(local
, sdata
);
1644 case NL80211_IFTYPE_MESH_POINT
:
1645 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1646 changed
|= BSS_CHANGED_BEACON
|
1647 BSS_CHANGED_BEACON_ENABLED
;
1648 ieee80211_bss_info_change_notify(sdata
, changed
);
1651 case NL80211_IFTYPE_WDS
:
1653 case NL80211_IFTYPE_AP_VLAN
:
1654 case NL80211_IFTYPE_MONITOR
:
1655 /* ignore virtual */
1657 case NL80211_IFTYPE_P2P_DEVICE
:
1658 changed
= BSS_CHANGED_IDLE
;
1660 case NL80211_IFTYPE_UNSPECIFIED
:
1661 case NUM_NL80211_IFTYPES
:
1662 case NL80211_IFTYPE_P2P_CLIENT
:
1663 case NL80211_IFTYPE_P2P_GO
:
1669 ieee80211_recalc_ps(local
, -1);
1672 * The sta might be in psm against the ap (e.g. because
1673 * this was the state before a hw restart), so we
1674 * explicitly send a null packet in order to make sure
1675 * it'll sync against the ap (and get out of psm).
1677 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1678 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1679 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1681 if (!sdata
->u
.mgd
.associated
)
1684 ieee80211_send_nullfunc(local
, sdata
, 0);
1688 /* APs are now beaconing, add back stations */
1689 mutex_lock(&local
->sta_mtx
);
1690 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1691 enum ieee80211_sta_state state
;
1696 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1699 for (state
= IEEE80211_STA_NOTEXIST
;
1700 state
< sta
->sta_state
; state
++)
1701 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1704 mutex_unlock(&local
->sta_mtx
);
1707 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1708 if (ieee80211_sdata_running(sdata
))
1709 ieee80211_enable_keys(sdata
);
1712 local
->in_reconfig
= false;
1715 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
1716 ieee80211_add_virtual_monitor(local
);
1719 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1720 * sessions can be established after a resume.
1722 * Also tear down aggregation sessions since reconfiguring
1723 * them in a hardware restart scenario is not easily done
1724 * right now, and the hardware will have lost information
1725 * about the sessions, but we and the AP still think they
1726 * are active. This is really a workaround though.
1728 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1729 mutex_lock(&local
->sta_mtx
);
1731 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1732 ieee80211_sta_tear_down_BA_sessions(
1733 sta
, AGG_STOP_LOCAL_REQUEST
);
1734 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1737 mutex_unlock(&local
->sta_mtx
);
1740 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
1741 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1744 * If this is for hw restart things are still running.
1745 * We may want to change that later, however.
1747 if (!local
->suspended
|| reconfig_due_to_wowlan
)
1748 drv_restart_complete(local
);
1750 if (!local
->suspended
)
1754 /* first set suspended false, then resuming */
1755 local
->suspended
= false;
1757 local
->resuming
= false;
1759 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1760 if (!ieee80211_sdata_running(sdata
))
1762 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1763 ieee80211_sta_restart(sdata
);
1766 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1772 * Reconfigure sched scan if it was interrupted by FW restart or
1775 mutex_lock(&local
->mtx
);
1776 sched_scan_sdata
= rcu_dereference_protected(local
->sched_scan_sdata
,
1777 lockdep_is_held(&local
->mtx
));
1778 if (sched_scan_sdata
&& local
->sched_scan_req
)
1780 * Sched scan stopped, but we don't want to report it. Instead,
1781 * we're trying to reschedule.
1783 if (__ieee80211_request_sched_scan_start(sched_scan_sdata
,
1784 local
->sched_scan_req
))
1785 sched_scan_stopped
= true;
1786 mutex_unlock(&local
->mtx
);
1788 if (sched_scan_stopped
)
1789 cfg80211_sched_scan_stopped(local
->hw
.wiphy
);
1794 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1796 struct ieee80211_sub_if_data
*sdata
;
1797 struct ieee80211_local
*local
;
1798 struct ieee80211_key
*key
;
1803 sdata
= vif_to_sdata(vif
);
1804 local
= sdata
->local
;
1806 if (WARN_ON(!local
->resuming
))
1809 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1812 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1814 mutex_lock(&local
->key_mtx
);
1815 list_for_each_entry(key
, &sdata
->key_list
, list
)
1816 key
->flags
|= KEY_FLAG_TAINTED
;
1817 mutex_unlock(&local
->key_mtx
);
1819 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1821 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
1823 struct ieee80211_local
*local
= sdata
->local
;
1824 struct ieee80211_chanctx_conf
*chanctx_conf
;
1825 struct ieee80211_chanctx
*chanctx
;
1827 mutex_lock(&local
->chanctx_mtx
);
1829 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1830 lockdep_is_held(&local
->chanctx_mtx
));
1832 if (WARN_ON_ONCE(!chanctx_conf
))
1835 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1836 ieee80211_recalc_smps_chanctx(local
, chanctx
);
1838 mutex_unlock(&local
->chanctx_mtx
);
1841 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data
*sdata
)
1843 struct ieee80211_local
*local
= sdata
->local
;
1844 struct ieee80211_chanctx_conf
*chanctx_conf
;
1845 struct ieee80211_chanctx
*chanctx
;
1847 mutex_lock(&local
->chanctx_mtx
);
1849 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1850 lockdep_is_held(&local
->chanctx_mtx
));
1852 if (WARN_ON_ONCE(!chanctx_conf
))
1855 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1856 ieee80211_recalc_chanctx_min_def(local
, chanctx
);
1858 mutex_unlock(&local
->chanctx_mtx
);
1861 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1865 for (i
= 0; i
< n_ids
; i
++)
1872 * ieee80211_ie_split - split an IE buffer according to ordering
1874 * @ies: the IE buffer
1875 * @ielen: the length of the IE buffer
1876 * @ids: an array with element IDs that are allowed before
1878 * @n_ids: the size of the element ID array
1879 * @offset: offset where to start splitting in the buffer
1881 * This function splits an IE buffer by updating the @offset
1882 * variable to point to the location where the buffer should be
1885 * It assumes that the given IE buffer is well-formed, this
1886 * has to be guaranteed by the caller!
1888 * It also assumes that the IEs in the buffer are ordered
1889 * correctly, if not the result of using this function will not
1890 * be ordered correctly either, i.e. it does no reordering.
1892 * The function returns the offset where the next part of the
1893 * buffer starts, which may be @ielen if the entire (remainder)
1894 * of the buffer should be used.
1896 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1897 const u8
*ids
, int n_ids
, size_t offset
)
1899 size_t pos
= offset
;
1901 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1902 pos
+= 2 + ies
[pos
+ 1];
1907 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1909 size_t pos
= offset
;
1911 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1912 pos
+= 2 + ies
[pos
+ 1];
1917 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1921 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1923 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1927 * Scale up threshold values before storing it, as the RSSI averaging
1928 * algorithm uses a scaled up value as well. Change this scaling
1929 * factor if the RSSI averaging algorithm changes.
1931 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1932 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1935 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1939 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1941 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1942 rssi_min_thold
> rssi_max_thold
);
1944 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1947 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1949 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1951 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1953 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1955 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1957 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1962 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1963 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1964 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1966 /* capability flags */
1967 tmp
= cpu_to_le16(cap
);
1968 memcpy(pos
, &tmp
, sizeof(u16
));
1971 /* AMPDU parameters */
1972 *pos
++ = ht_cap
->ampdu_factor
|
1973 (ht_cap
->ampdu_density
<<
1974 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1977 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1978 pos
+= sizeof(ht_cap
->mcs
);
1980 /* extended capabilities */
1981 pos
+= sizeof(__le16
);
1983 /* BF capabilities */
1984 pos
+= sizeof(__le32
);
1986 /* antenna selection */
1992 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
1997 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
1998 *pos
++ = sizeof(struct ieee80211_vht_cap
);
1999 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
2001 /* capability flags */
2002 tmp
= cpu_to_le32(cap
);
2003 memcpy(pos
, &tmp
, sizeof(u32
));
2007 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
2008 pos
+= sizeof(vht_cap
->vht_mcs
);
2013 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2014 const struct cfg80211_chan_def
*chandef
,
2017 struct ieee80211_ht_operation
*ht_oper
;
2018 /* Build HT Information */
2019 *pos
++ = WLAN_EID_HT_OPERATION
;
2020 *pos
++ = sizeof(struct ieee80211_ht_operation
);
2021 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
2022 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
2023 chandef
->chan
->center_freq
);
2024 switch (chandef
->width
) {
2025 case NL80211_CHAN_WIDTH_160
:
2026 case NL80211_CHAN_WIDTH_80P80
:
2027 case NL80211_CHAN_WIDTH_80
:
2028 case NL80211_CHAN_WIDTH_40
:
2029 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
2030 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2032 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2035 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
2038 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
2039 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
2040 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
2041 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
2043 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
2044 ht_oper
->stbc_param
= 0x0000;
2046 /* It seems that Basic MCS set and Supported MCS set
2047 are identical for the first 10 bytes */
2048 memset(&ht_oper
->basic_set
, 0, 16);
2049 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
2051 return pos
+ sizeof(struct ieee80211_ht_operation
);
2054 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2055 const struct ieee80211_ht_operation
*ht_oper
,
2056 struct cfg80211_chan_def
*chandef
)
2058 enum nl80211_channel_type channel_type
;
2061 cfg80211_chandef_create(chandef
, control_chan
,
2062 NL80211_CHAN_NO_HT
);
2066 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2067 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2068 channel_type
= NL80211_CHAN_HT20
;
2070 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2071 channel_type
= NL80211_CHAN_HT40PLUS
;
2073 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2074 channel_type
= NL80211_CHAN_HT40MINUS
;
2077 channel_type
= NL80211_CHAN_NO_HT
;
2080 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2083 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2084 const struct ieee80211_supported_band
*sband
,
2085 const u8
*srates
, int srates_len
, u32
*rates
)
2087 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2088 int shift
= ieee80211_chandef_get_shift(chandef
);
2089 struct ieee80211_rate
*br
;
2090 int brate
, rate
, i
, j
, count
= 0;
2094 for (i
= 0; i
< srates_len
; i
++) {
2095 rate
= srates
[i
] & 0x7f;
2097 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2098 br
= &sband
->bitrates
[j
];
2099 if ((rate_flags
& br
->flags
) != rate_flags
)
2102 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2103 if (brate
== rate
) {
2113 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2114 struct sk_buff
*skb
, bool need_basic
,
2115 enum ieee80211_band band
)
2117 struct ieee80211_local
*local
= sdata
->local
;
2118 struct ieee80211_supported_band
*sband
;
2121 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2124 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2125 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2126 sband
= local
->hw
.wiphy
->bands
[band
];
2128 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2129 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2136 if (skb_tailroom(skb
) < rates
+ 2)
2139 pos
= skb_put(skb
, rates
+ 2);
2140 *pos
++ = WLAN_EID_SUPP_RATES
;
2142 for (i
= 0; i
< rates
; i
++) {
2144 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2147 if (need_basic
&& basic_rates
& BIT(i
))
2149 rate
= sband
->bitrates
[i
].bitrate
;
2150 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2152 *pos
++ = basic
| (u8
) rate
;
2158 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2159 struct sk_buff
*skb
, bool need_basic
,
2160 enum ieee80211_band band
)
2162 struct ieee80211_local
*local
= sdata
->local
;
2163 struct ieee80211_supported_band
*sband
;
2165 u8 i
, exrates
, *pos
;
2166 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2169 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2170 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2172 sband
= local
->hw
.wiphy
->bands
[band
];
2174 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2175 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2185 if (skb_tailroom(skb
) < exrates
+ 2)
2189 pos
= skb_put(skb
, exrates
+ 2);
2190 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2192 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2194 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2197 if (need_basic
&& basic_rates
& BIT(i
))
2199 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2201 *pos
++ = basic
| (u8
) rate
;
2207 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2209 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2210 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2212 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2213 /* non-managed type inferfaces */
2216 return ifmgd
->ave_beacon_signal
/ 16;
2218 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2220 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2225 /* TODO: consider rx_highest */
2227 if (mcs
->rx_mask
[3])
2229 if (mcs
->rx_mask
[2])
2231 if (mcs
->rx_mask
[1])
2237 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2238 * @local: mac80211 hw info struct
2239 * @status: RX status
2240 * @mpdu_len: total MPDU length (including FCS)
2241 * @mpdu_offset: offset into MPDU to calculate timestamp at
2243 * This function calculates the RX timestamp at the given MPDU offset, taking
2244 * into account what the RX timestamp was. An offset of 0 will just normalize
2245 * the timestamp to TSF at beginning of MPDU reception.
2247 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2248 struct ieee80211_rx_status
*status
,
2249 unsigned int mpdu_len
,
2250 unsigned int mpdu_offset
)
2252 u64 ts
= status
->mactime
;
2253 struct rate_info ri
;
2256 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2259 memset(&ri
, 0, sizeof(ri
));
2261 /* Fill cfg80211 rate info */
2262 if (status
->flag
& RX_FLAG_HT
) {
2263 ri
.mcs
= status
->rate_idx
;
2264 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2265 if (status
->flag
& RX_FLAG_40MHZ
)
2266 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2267 if (status
->flag
& RX_FLAG_SHORT_GI
)
2268 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2269 } else if (status
->flag
& RX_FLAG_VHT
) {
2270 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2271 ri
.mcs
= status
->rate_idx
;
2272 ri
.nss
= status
->vht_nss
;
2273 if (status
->flag
& RX_FLAG_40MHZ
)
2274 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2275 if (status
->flag
& RX_FLAG_80MHZ
)
2276 ri
.flags
|= RATE_INFO_FLAGS_80_MHZ_WIDTH
;
2277 if (status
->flag
& RX_FLAG_80P80MHZ
)
2278 ri
.flags
|= RATE_INFO_FLAGS_80P80_MHZ_WIDTH
;
2279 if (status
->flag
& RX_FLAG_160MHZ
)
2280 ri
.flags
|= RATE_INFO_FLAGS_160_MHZ_WIDTH
;
2281 if (status
->flag
& RX_FLAG_SHORT_GI
)
2282 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2284 struct ieee80211_supported_band
*sband
;
2288 if (status
->flag
& RX_FLAG_10MHZ
)
2290 if (status
->flag
& RX_FLAG_5MHZ
)
2293 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2294 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2295 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2298 rate
= cfg80211_calculate_bitrate(&ri
);
2299 if (WARN_ONCE(!rate
,
2300 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2301 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2304 /* rewind from end of MPDU */
2305 if (status
->flag
& RX_FLAG_MACTIME_END
)
2306 ts
-= mpdu_len
* 8 * 10 / rate
;
2308 ts
+= mpdu_offset
* 8 * 10 / rate
;
2313 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2315 struct ieee80211_sub_if_data
*sdata
;
2316 struct cfg80211_chan_def chandef
;
2318 mutex_lock(&local
->mtx
);
2319 mutex_lock(&local
->iflist_mtx
);
2320 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2321 /* it might be waiting for the local->mtx, but then
2322 * by the time it gets it, sdata->wdev.cac_started
2323 * will no longer be true
2325 cancel_delayed_work(&sdata
->dfs_cac_timer_work
);
2327 if (sdata
->wdev
.cac_started
) {
2328 chandef
= sdata
->vif
.bss_conf
.chandef
;
2329 ieee80211_vif_release_channel(sdata
);
2330 cfg80211_cac_event(sdata
->dev
,
2332 NL80211_RADAR_CAC_ABORTED
,
2336 mutex_unlock(&local
->iflist_mtx
);
2337 mutex_unlock(&local
->mtx
);
2340 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2342 struct ieee80211_local
*local
=
2343 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2344 struct cfg80211_chan_def chandef
= local
->hw
.conf
.chandef
;
2346 ieee80211_dfs_cac_cancel(local
);
2348 if (local
->use_chanctx
)
2349 /* currently not handled */
2352 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2355 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2357 struct ieee80211_local
*local
= hw_to_local(hw
);
2359 trace_api_radar_detected(local
);
2361 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2363 EXPORT_SYMBOL(ieee80211_radar_detected
);
2365 u32
ieee80211_chandef_downgrade(struct cfg80211_chan_def
*c
)
2371 case NL80211_CHAN_WIDTH_20
:
2372 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2373 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2375 case NL80211_CHAN_WIDTH_40
:
2376 c
->width
= NL80211_CHAN_WIDTH_20
;
2377 c
->center_freq1
= c
->chan
->center_freq
;
2378 ret
= IEEE80211_STA_DISABLE_40MHZ
|
2379 IEEE80211_STA_DISABLE_VHT
;
2381 case NL80211_CHAN_WIDTH_80
:
2382 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2386 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
2387 c
->width
= NL80211_CHAN_WIDTH_40
;
2388 ret
= IEEE80211_STA_DISABLE_VHT
;
2390 case NL80211_CHAN_WIDTH_80P80
:
2391 c
->center_freq2
= 0;
2392 c
->width
= NL80211_CHAN_WIDTH_80
;
2393 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2394 IEEE80211_STA_DISABLE_160MHZ
;
2396 case NL80211_CHAN_WIDTH_160
:
2398 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2401 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
2402 c
->width
= NL80211_CHAN_WIDTH_80
;
2403 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2404 IEEE80211_STA_DISABLE_160MHZ
;
2407 case NL80211_CHAN_WIDTH_20_NOHT
:
2409 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2410 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2412 case NL80211_CHAN_WIDTH_5
:
2413 case NL80211_CHAN_WIDTH_10
:
2416 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2420 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
2426 * Returns true if smps_mode_new is strictly more restrictive than
2429 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old
,
2430 enum ieee80211_smps_mode smps_mode_new
)
2432 if (WARN_ON_ONCE(smps_mode_old
== IEEE80211_SMPS_AUTOMATIC
||
2433 smps_mode_new
== IEEE80211_SMPS_AUTOMATIC
))
2436 switch (smps_mode_old
) {
2437 case IEEE80211_SMPS_STATIC
:
2439 case IEEE80211_SMPS_DYNAMIC
:
2440 return smps_mode_new
== IEEE80211_SMPS_STATIC
;
2441 case IEEE80211_SMPS_OFF
:
2442 return smps_mode_new
!= IEEE80211_SMPS_OFF
;
2450 int ieee80211_send_action_csa(struct ieee80211_sub_if_data
*sdata
,
2451 struct cfg80211_csa_settings
*csa_settings
)
2453 struct sk_buff
*skb
;
2454 struct ieee80211_mgmt
*mgmt
;
2455 struct ieee80211_local
*local
= sdata
->local
;
2457 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.chan_switch
) +
2458 sizeof(mgmt
->u
.action
.u
.chan_switch
);
2461 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2462 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2465 skb
= dev_alloc_skb(local
->tx_headroom
+ hdr_len
+
2466 5 + /* channel switch announcement element */
2467 3 + /* secondary channel offset element */
2468 8); /* mesh channel switch parameters element */
2472 skb_reserve(skb
, local
->tx_headroom
);
2473 mgmt
= (struct ieee80211_mgmt
*)skb_put(skb
, hdr_len
);
2474 memset(mgmt
, 0, hdr_len
);
2475 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2476 IEEE80211_STYPE_ACTION
);
2478 eth_broadcast_addr(mgmt
->da
);
2479 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2480 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2481 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2483 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2484 memcpy(mgmt
->bssid
, ifibss
->bssid
, ETH_ALEN
);
2486 mgmt
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
2487 mgmt
->u
.action
.u
.chan_switch
.action_code
= WLAN_ACTION_SPCT_CHL_SWITCH
;
2488 pos
= skb_put(skb
, 5);
2489 *pos
++ = WLAN_EID_CHANNEL_SWITCH
; /* EID */
2490 *pos
++ = 3; /* IE length */
2491 *pos
++ = csa_settings
->block_tx
? 1 : 0; /* CSA mode */
2492 freq
= csa_settings
->chandef
.chan
->center_freq
;
2493 *pos
++ = ieee80211_frequency_to_channel(freq
); /* channel */
2494 *pos
++ = csa_settings
->count
; /* count */
2496 if (csa_settings
->chandef
.width
== NL80211_CHAN_WIDTH_40
) {
2497 enum nl80211_channel_type ch_type
;
2500 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
2501 *pos
++ = 1; /* IE length */
2502 ch_type
= cfg80211_get_chandef_type(&csa_settings
->chandef
);
2503 if (ch_type
== NL80211_CHAN_HT40PLUS
)
2504 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2506 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2509 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2510 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2513 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
; /* EID */
2514 *pos
++ = 6; /* IE length */
2515 *pos
++ = sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
; /* Mesh TTL */
2516 *pos
= 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2517 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
2518 *pos
++ |= csa_settings
->block_tx
?
2519 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
2520 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
); /* Reason Cd */
2522 put_unaligned_le16(ifmsh
->pre_value
, pos
);/* Precedence Value */
2526 ieee80211_tx_skb(sdata
, skb
);
2530 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme
*cs
)
2532 return !(cs
== NULL
|| cs
->cipher
== 0 ||
2533 cs
->hdr_len
< cs
->pn_len
+ cs
->pn_off
||
2534 cs
->hdr_len
<= cs
->key_idx_off
||
2535 cs
->key_idx_shift
> 7 ||
2536 cs
->key_idx_mask
== 0);
2539 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme
*cs
, int n
)
2543 /* Ensure we have enough iftype bitmap space for all iftype values */
2544 WARN_ON((NUM_NL80211_IFTYPES
/ 8 + 1) > sizeof(cs
[0].iftype
));
2546 for (i
= 0; i
< n
; i
++)
2547 if (!ieee80211_cs_valid(&cs
[i
]))
2553 const struct ieee80211_cipher_scheme
*
2554 ieee80211_cs_get(struct ieee80211_local
*local
, u32 cipher
,
2555 enum nl80211_iftype iftype
)
2557 const struct ieee80211_cipher_scheme
*l
= local
->hw
.cipher_schemes
;
2558 int n
= local
->hw
.n_cipher_schemes
;
2560 const struct ieee80211_cipher_scheme
*cs
= NULL
;
2562 for (i
= 0; i
< n
; i
++) {
2563 if (l
[i
].cipher
== cipher
) {
2569 if (!cs
|| !(cs
->iftype
& BIT(iftype
)))
2575 int ieee80211_cs_headroom(struct ieee80211_local
*local
,
2576 struct cfg80211_crypto_settings
*crypto
,
2577 enum nl80211_iftype iftype
)
2579 const struct ieee80211_cipher_scheme
*cs
;
2580 int headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2583 for (i
= 0; i
< crypto
->n_ciphers_pairwise
; i
++) {
2584 cs
= ieee80211_cs_get(local
, crypto
->ciphers_pairwise
[i
],
2587 if (cs
&& headroom
< cs
->hdr_len
)
2588 headroom
= cs
->hdr_len
;
2591 cs
= ieee80211_cs_get(local
, crypto
->cipher_group
, iftype
);
2592 if (cs
&& headroom
< cs
->hdr_len
)
2593 headroom
= cs
->hdr_len
;
2599 ieee80211_extend_noa_desc(struct ieee80211_noa_data
*data
, u32 tsf
, int i
)
2601 s32 end
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- (tsf
+ 1);
2607 /* End time is in the past, check for repetitions */
2608 skip
= DIV_ROUND_UP(-end
, data
->desc
[i
].interval
);
2609 if (data
->count
[i
] < 255) {
2610 if (data
->count
[i
] <= skip
) {
2615 data
->count
[i
] -= skip
;
2618 data
->desc
[i
].start
+= skip
* data
->desc
[i
].interval
;
2624 ieee80211_extend_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
,
2630 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2633 if (!data
->count
[i
])
2636 if (ieee80211_extend_noa_desc(data
, tsf
+ *offset
, i
))
2639 cur
= data
->desc
[i
].start
- tsf
;
2643 cur
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- tsf
;
2652 ieee80211_get_noa_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
)
2657 * arbitrary limit, used to avoid infinite loops when combined NoA
2658 * descriptors cover the full time period.
2662 ieee80211_extend_absent_time(data
, tsf
, &offset
);
2664 if (!ieee80211_extend_absent_time(data
, tsf
, &offset
))
2668 } while (tries
< max_tries
);
2673 void ieee80211_update_p2p_noa(struct ieee80211_noa_data
*data
, u32 tsf
)
2675 u32 next_offset
= BIT(31) - 1;
2679 data
->has_next_tsf
= false;
2680 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2683 if (!data
->count
[i
])
2686 ieee80211_extend_noa_desc(data
, tsf
, i
);
2687 start
= data
->desc
[i
].start
- tsf
;
2689 data
->absent
|= BIT(i
);
2691 if (next_offset
> start
)
2692 next_offset
= start
;
2694 data
->has_next_tsf
= true;
2698 next_offset
= ieee80211_get_noa_absent_time(data
, tsf
);
2700 data
->next_tsf
= tsf
+ next_offset
;
2702 EXPORT_SYMBOL(ieee80211_update_p2p_noa
);
2704 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr
*attr
,
2705 struct ieee80211_noa_data
*data
, u32 tsf
)
2710 memset(data
, 0, sizeof(*data
));
2712 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2713 const struct ieee80211_p2p_noa_desc
*desc
= &attr
->desc
[i
];
2715 if (!desc
->count
|| !desc
->duration
)
2718 data
->count
[i
] = desc
->count
;
2719 data
->desc
[i
].start
= le32_to_cpu(desc
->start_time
);
2720 data
->desc
[i
].duration
= le32_to_cpu(desc
->duration
);
2721 data
->desc
[i
].interval
= le32_to_cpu(desc
->interval
);
2723 if (data
->count
[i
] > 1 &&
2724 data
->desc
[i
].interval
< data
->desc
[i
].duration
)
2727 ieee80211_extend_noa_desc(data
, tsf
, i
);
2732 ieee80211_update_p2p_noa(data
, tsf
);
2736 EXPORT_SYMBOL(ieee80211_parse_p2p_noa
);
2738 void ieee80211_recalc_dtim(struct ieee80211_local
*local
,
2739 struct ieee80211_sub_if_data
*sdata
)
2741 u64 tsf
= drv_get_tsf(local
, sdata
);
2743 u16 beacon_int
= sdata
->vif
.bss_conf
.beacon_int
* 1024;
2744 u8 dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
2748 if (tsf
== -1ULL || !beacon_int
|| !dtim_period
)
2751 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2752 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
2756 ps
= &sdata
->bss
->ps
;
2757 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2758 ps
= &sdata
->u
.mesh
.ps
;
2764 * actually finds last dtim_count, mac80211 will update in
2765 * __beacon_add_tim().
2766 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2768 do_div(tsf
, beacon_int
);
2769 bcns_from_dtim
= do_div(tsf
, dtim_period
);
2770 /* just had a DTIM */
2771 if (!bcns_from_dtim
)
2774 dtim_count
= dtim_period
- bcns_from_dtim
;
2776 ps
->dtim_count
= dtim_count
;