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 (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
306 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
307 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
310 for (ac
= 0; ac
< n_acs
; ac
++) {
311 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
313 if (ac_queue
== queue
||
314 (sdata
->vif
.cab_queue
== queue
&&
315 local
->queue_stop_reasons
[ac_queue
] == 0 &&
316 skb_queue_empty(&local
->pending
[ac_queue
])))
317 netif_wake_subqueue(sdata
->dev
, ac
);
322 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
323 enum queue_stop_reason reason
)
325 struct ieee80211_local
*local
= hw_to_local(hw
);
327 trace_wake_queue(local
, queue
, reason
);
329 if (WARN_ON(queue
>= hw
->queues
))
332 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
335 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
337 if (local
->queue_stop_reasons
[queue
] != 0)
338 /* someone still has this queue stopped */
341 if (skb_queue_empty(&local
->pending
[queue
])) {
343 ieee80211_propagate_queue_wake(local
, queue
);
346 tasklet_schedule(&local
->tx_pending_tasklet
);
349 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
350 enum queue_stop_reason reason
)
352 struct ieee80211_local
*local
= hw_to_local(hw
);
355 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
356 __ieee80211_wake_queue(hw
, queue
, reason
);
357 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
360 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
362 ieee80211_wake_queue_by_reason(hw
, queue
,
363 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
365 EXPORT_SYMBOL(ieee80211_wake_queue
);
367 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
368 enum queue_stop_reason reason
)
370 struct ieee80211_local
*local
= hw_to_local(hw
);
371 struct ieee80211_sub_if_data
*sdata
;
372 int n_acs
= IEEE80211_NUM_ACS
;
374 trace_stop_queue(local
, queue
, reason
);
376 if (WARN_ON(queue
>= hw
->queues
))
379 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
382 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
384 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
388 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
394 for (ac
= 0; ac
< n_acs
; ac
++) {
395 if (sdata
->vif
.hw_queue
[ac
] == queue
||
396 sdata
->vif
.cab_queue
== queue
)
397 netif_stop_subqueue(sdata
->dev
, ac
);
403 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
404 enum queue_stop_reason reason
)
406 struct ieee80211_local
*local
= hw_to_local(hw
);
409 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
410 __ieee80211_stop_queue(hw
, queue
, reason
);
411 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
414 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
416 ieee80211_stop_queue_by_reason(hw
, queue
,
417 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
419 EXPORT_SYMBOL(ieee80211_stop_queue
);
421 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
424 struct ieee80211_hw
*hw
= &local
->hw
;
426 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
427 int queue
= info
->hw_queue
;
429 if (WARN_ON(!info
->control
.vif
)) {
430 ieee80211_free_txskb(&local
->hw
, skb
);
434 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
435 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
436 __skb_queue_tail(&local
->pending
[queue
], skb
);
437 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
438 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
441 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
442 struct sk_buff_head
*skbs
,
443 void (*fn
)(void *data
), void *data
)
445 struct ieee80211_hw
*hw
= &local
->hw
;
450 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
451 while ((skb
= skb_dequeue(skbs
))) {
452 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
454 if (WARN_ON(!info
->control
.vif
)) {
455 ieee80211_free_txskb(&local
->hw
, skb
);
459 queue
= info
->hw_queue
;
461 __ieee80211_stop_queue(hw
, queue
,
462 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
464 __skb_queue_tail(&local
->pending
[queue
], skb
);
470 for (i
= 0; i
< hw
->queues
; i
++)
471 __ieee80211_wake_queue(hw
, i
,
472 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
473 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
476 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
477 unsigned long queues
,
478 enum queue_stop_reason reason
)
480 struct ieee80211_local
*local
= hw_to_local(hw
);
484 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
486 for_each_set_bit(i
, &queues
, hw
->queues
)
487 __ieee80211_stop_queue(hw
, i
, reason
);
489 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
492 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
494 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
495 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
497 EXPORT_SYMBOL(ieee80211_stop_queues
);
499 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
501 struct ieee80211_local
*local
= hw_to_local(hw
);
505 if (WARN_ON(queue
>= hw
->queues
))
508 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
509 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
510 &local
->queue_stop_reasons
[queue
]);
511 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
514 EXPORT_SYMBOL(ieee80211_queue_stopped
);
516 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
517 unsigned long queues
,
518 enum queue_stop_reason reason
)
520 struct ieee80211_local
*local
= hw_to_local(hw
);
524 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
526 for_each_set_bit(i
, &queues
, hw
->queues
)
527 __ieee80211_wake_queue(hw
, i
, reason
);
529 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
532 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
534 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
535 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
537 EXPORT_SYMBOL(ieee80211_wake_queues
);
539 void ieee80211_flush_queues(struct ieee80211_local
*local
,
540 struct ieee80211_sub_if_data
*sdata
)
544 if (!local
->ops
->flush
)
547 if (sdata
&& local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
552 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
553 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
554 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
555 queues
|= BIT(sdata
->vif
.cab_queue
);
558 queues
= BIT(local
->hw
.queues
) - 1;
561 ieee80211_stop_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
562 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
564 drv_flush(local
, queues
, false);
566 ieee80211_wake_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
567 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
570 void ieee80211_iterate_active_interfaces(
571 struct ieee80211_hw
*hw
, u32 iter_flags
,
572 void (*iterator
)(void *data
, u8
*mac
,
573 struct ieee80211_vif
*vif
),
576 struct ieee80211_local
*local
= hw_to_local(hw
);
577 struct ieee80211_sub_if_data
*sdata
;
579 mutex_lock(&local
->iflist_mtx
);
581 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
582 switch (sdata
->vif
.type
) {
583 case NL80211_IFTYPE_MONITOR
:
584 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
587 case NL80211_IFTYPE_AP_VLAN
:
592 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
593 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
595 if (ieee80211_sdata_running(sdata
))
596 iterator(data
, sdata
->vif
.addr
,
600 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
601 lockdep_is_held(&local
->iflist_mtx
));
603 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
604 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
605 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
607 mutex_unlock(&local
->iflist_mtx
);
609 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
611 void ieee80211_iterate_active_interfaces_atomic(
612 struct ieee80211_hw
*hw
, u32 iter_flags
,
613 void (*iterator
)(void *data
, u8
*mac
,
614 struct ieee80211_vif
*vif
),
617 struct ieee80211_local
*local
= hw_to_local(hw
);
618 struct ieee80211_sub_if_data
*sdata
;
622 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
623 switch (sdata
->vif
.type
) {
624 case NL80211_IFTYPE_MONITOR
:
625 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
628 case NL80211_IFTYPE_AP_VLAN
:
633 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
634 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
636 if (ieee80211_sdata_running(sdata
))
637 iterator(data
, sdata
->vif
.addr
,
641 sdata
= rcu_dereference(local
->monitor_sdata
);
643 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
644 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
645 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
649 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
652 * Nothing should have been stuffed into the workqueue during
653 * the suspend->resume cycle. If this WARN is seen then there
654 * is a bug with either the driver suspend or something in
655 * mac80211 stuffing into the workqueue which we haven't yet
656 * cleared during mac80211's suspend cycle.
658 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
660 if (WARN(local
->suspended
&& !local
->resuming
,
661 "queueing ieee80211 work while going to suspend\n"))
667 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
669 struct ieee80211_local
*local
= hw_to_local(hw
);
671 if (!ieee80211_can_queue_work(local
))
674 queue_work(local
->workqueue
, work
);
676 EXPORT_SYMBOL(ieee80211_queue_work
);
678 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
679 struct delayed_work
*dwork
,
682 struct ieee80211_local
*local
= hw_to_local(hw
);
684 if (!ieee80211_can_queue_work(local
))
687 queue_delayed_work(local
->workqueue
, dwork
, delay
);
689 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
691 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
692 struct ieee802_11_elems
*elems
,
696 const u8
*pos
= start
;
697 bool calc_crc
= filter
!= 0;
698 DECLARE_BITMAP(seen_elems
, 256);
701 bitmap_zero(seen_elems
, 256);
702 memset(elems
, 0, sizeof(*elems
));
703 elems
->ie_start
= start
;
704 elems
->total_len
= len
;
708 bool elem_parse_failed
;
715 elems
->parse_error
= true;
721 case WLAN_EID_SUPP_RATES
:
722 case WLAN_EID_FH_PARAMS
:
723 case WLAN_EID_DS_PARAMS
:
724 case WLAN_EID_CF_PARAMS
:
726 case WLAN_EID_IBSS_PARAMS
:
727 case WLAN_EID_CHALLENGE
:
729 case WLAN_EID_ERP_INFO
:
730 case WLAN_EID_EXT_SUPP_RATES
:
731 case WLAN_EID_HT_CAPABILITY
:
732 case WLAN_EID_HT_OPERATION
:
733 case WLAN_EID_VHT_CAPABILITY
:
734 case WLAN_EID_VHT_OPERATION
:
735 case WLAN_EID_MESH_ID
:
736 case WLAN_EID_MESH_CONFIG
:
737 case WLAN_EID_PEER_MGMT
:
742 case WLAN_EID_CHANNEL_SWITCH
:
743 case WLAN_EID_EXT_CHANSWITCH_ANN
:
744 case WLAN_EID_COUNTRY
:
745 case WLAN_EID_PWR_CONSTRAINT
:
746 case WLAN_EID_TIMEOUT_INTERVAL
:
747 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
748 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
750 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
751 * that if the content gets bigger it might be needed more than once
753 if (test_bit(id
, seen_elems
)) {
754 elems
->parse_error
= true;
762 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
763 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
765 elem_parse_failed
= false;
770 elems
->ssid_len
= elen
;
772 case WLAN_EID_SUPP_RATES
:
773 elems
->supp_rates
= pos
;
774 elems
->supp_rates_len
= elen
;
776 case WLAN_EID_DS_PARAMS
:
778 elems
->ds_params
= pos
;
780 elem_parse_failed
= true;
783 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
784 elems
->tim
= (void *)pos
;
785 elems
->tim_len
= elen
;
787 elem_parse_failed
= true;
789 case WLAN_EID_CHALLENGE
:
790 elems
->challenge
= pos
;
791 elems
->challenge_len
= elen
;
793 case WLAN_EID_VENDOR_SPECIFIC
:
794 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
796 /* Microsoft OUI (00:50:F2) */
799 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
801 if (elen
>= 5 && pos
[3] == 2) {
802 /* OUI Type 2 - WMM IE */
804 elems
->wmm_info
= pos
;
805 elems
->wmm_info_len
= elen
;
806 } else if (pos
[4] == 1) {
807 elems
->wmm_param
= pos
;
808 elems
->wmm_param_len
= elen
;
815 elems
->rsn_len
= elen
;
817 case WLAN_EID_ERP_INFO
:
819 elems
->erp_info
= pos
;
821 elem_parse_failed
= true;
823 case WLAN_EID_EXT_SUPP_RATES
:
824 elems
->ext_supp_rates
= pos
;
825 elems
->ext_supp_rates_len
= elen
;
827 case WLAN_EID_HT_CAPABILITY
:
828 if (elen
>= sizeof(struct ieee80211_ht_cap
))
829 elems
->ht_cap_elem
= (void *)pos
;
831 elem_parse_failed
= true;
833 case WLAN_EID_HT_OPERATION
:
834 if (elen
>= sizeof(struct ieee80211_ht_operation
))
835 elems
->ht_operation
= (void *)pos
;
837 elem_parse_failed
= true;
839 case WLAN_EID_VHT_CAPABILITY
:
840 if (elen
>= sizeof(struct ieee80211_vht_cap
))
841 elems
->vht_cap_elem
= (void *)pos
;
843 elem_parse_failed
= true;
845 case WLAN_EID_VHT_OPERATION
:
846 if (elen
>= sizeof(struct ieee80211_vht_operation
))
847 elems
->vht_operation
= (void *)pos
;
849 elem_parse_failed
= true;
851 case WLAN_EID_OPMODE_NOTIF
:
853 elems
->opmode_notif
= pos
;
855 elem_parse_failed
= true;
857 case WLAN_EID_MESH_ID
:
858 elems
->mesh_id
= pos
;
859 elems
->mesh_id_len
= elen
;
861 case WLAN_EID_MESH_CONFIG
:
862 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
863 elems
->mesh_config
= (void *)pos
;
865 elem_parse_failed
= true;
867 case WLAN_EID_PEER_MGMT
:
868 elems
->peering
= pos
;
869 elems
->peering_len
= elen
;
871 case WLAN_EID_MESH_AWAKE_WINDOW
:
873 elems
->awake_window
= (void *)pos
;
877 elems
->preq_len
= elen
;
881 elems
->prep_len
= elen
;
885 elems
->perr_len
= elen
;
888 if (elen
>= sizeof(struct ieee80211_rann_ie
))
889 elems
->rann
= (void *)pos
;
891 elem_parse_failed
= true;
893 case WLAN_EID_CHANNEL_SWITCH
:
894 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
895 elem_parse_failed
= true;
898 elems
->ch_switch_ie
= (void *)pos
;
900 case WLAN_EID_EXT_CHANSWITCH_ANN
:
901 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
902 elem_parse_failed
= true;
905 elems
->ext_chansw_ie
= (void *)pos
;
907 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
908 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
909 elem_parse_failed
= true;
912 elems
->sec_chan_offs
= (void *)pos
;
914 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
916 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
917 elem_parse_failed
= true;
920 elems
->wide_bw_chansw_ie
= (void *)pos
;
922 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
924 elem_parse_failed
= true;
928 * This is a bit tricky, but as we only care about
929 * the wide bandwidth channel switch element, so
930 * just parse it out manually.
932 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
935 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
936 elems
->wide_bw_chansw_ie
=
939 elem_parse_failed
= true;
942 case WLAN_EID_COUNTRY
:
943 elems
->country_elem
= pos
;
944 elems
->country_elem_len
= elen
;
946 case WLAN_EID_PWR_CONSTRAINT
:
948 elem_parse_failed
= true;
951 elems
->pwr_constr_elem
= pos
;
953 case WLAN_EID_TIMEOUT_INTERVAL
:
954 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
955 elems
->timeout_int
= (void *)pos
;
957 elem_parse_failed
= true;
963 if (elem_parse_failed
)
964 elems
->parse_error
= true;
966 __set_bit(id
, seen_elems
);
973 elems
->parse_error
= true;
978 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
981 struct ieee80211_local
*local
= sdata
->local
;
982 struct ieee80211_tx_queue_params qparam
;
983 struct ieee80211_chanctx_conf
*chanctx_conf
;
985 bool use_11b
, enable_qos
;
988 if (!local
->ops
->conf_tx
)
991 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
994 memset(&qparam
, 0, sizeof(qparam
));
997 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
998 use_11b
= (chanctx_conf
&&
999 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1000 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1004 * By default disable QoS in STA mode for old access points, which do
1005 * not support 802.11e. New APs will provide proper queue parameters,
1006 * that we will configure later.
1008 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
1010 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1011 /* Set defaults according to 802.11-2007 Table 7-37 */
1020 case IEEE80211_AC_BK
:
1021 qparam
.cw_max
= aCWmax
;
1022 qparam
.cw_min
= aCWmin
;
1026 /* never happens but let's not leave undefined */
1028 case IEEE80211_AC_BE
:
1029 qparam
.cw_max
= aCWmax
;
1030 qparam
.cw_min
= aCWmin
;
1034 case IEEE80211_AC_VI
:
1035 qparam
.cw_max
= aCWmin
;
1036 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1038 qparam
.txop
= 6016/32;
1040 qparam
.txop
= 3008/32;
1043 case IEEE80211_AC_VO
:
1044 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1045 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1047 qparam
.txop
= 3264/32;
1049 qparam
.txop
= 1504/32;
1054 /* Confiure old 802.11b/g medium access rules. */
1055 qparam
.cw_max
= aCWmax
;
1056 qparam
.cw_min
= aCWmin
;
1061 qparam
.uapsd
= false;
1063 sdata
->tx_conf
[ac
] = qparam
;
1064 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1067 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1068 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1069 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1071 ieee80211_bss_info_change_notify(sdata
,
1076 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1077 u16 transaction
, u16 auth_alg
, u16 status
,
1078 const u8
*extra
, size_t extra_len
, const u8
*da
,
1079 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1082 struct ieee80211_local
*local
= sdata
->local
;
1083 struct sk_buff
*skb
;
1084 struct ieee80211_mgmt
*mgmt
;
1087 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1088 sizeof(*mgmt
) + 6 + extra_len
);
1092 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1094 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1095 memset(mgmt
, 0, 24 + 6);
1096 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1097 IEEE80211_STYPE_AUTH
);
1098 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1099 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1100 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1101 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1102 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1103 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1105 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1107 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1108 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1109 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1113 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1115 ieee80211_tx_skb(sdata
, skb
);
1118 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1119 const u8
*bssid
, u16 stype
, u16 reason
,
1120 bool send_frame
, u8
*frame_buf
)
1122 struct ieee80211_local
*local
= sdata
->local
;
1123 struct sk_buff
*skb
;
1124 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1127 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1128 mgmt
->duration
= 0; /* initialize only */
1129 mgmt
->seq_ctrl
= 0; /* initialize only */
1130 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1131 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1132 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1133 /* u.deauth.reason_code == u.disassoc.reason_code */
1134 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1137 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1138 IEEE80211_DEAUTH_FRAME_LEN
);
1142 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1145 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1146 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1148 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1149 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1150 IEEE80211_SKB_CB(skb
)->flags
|=
1151 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1153 ieee80211_tx_skb(sdata
, skb
);
1157 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1158 size_t buffer_len
, const u8
*ie
, size_t ie_len
,
1159 enum ieee80211_band band
, u32 rate_mask
,
1160 struct cfg80211_chan_def
*chandef
)
1162 struct ieee80211_supported_band
*sband
;
1163 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1164 size_t offset
= 0, noffset
;
1165 int supp_rates_len
, i
;
1172 sband
= local
->hw
.wiphy
->bands
[band
];
1173 if (WARN_ON_ONCE(!sband
))
1176 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1177 shift
= ieee80211_chandef_get_shift(chandef
);
1180 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1181 if ((BIT(i
) & rate_mask
) == 0)
1182 continue; /* skip rate */
1183 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1186 rates
[num_rates
++] =
1187 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1191 supp_rates_len
= min_t(int, num_rates
, 8);
1193 if (end
- pos
< 2 + supp_rates_len
)
1195 *pos
++ = WLAN_EID_SUPP_RATES
;
1196 *pos
++ = supp_rates_len
;
1197 memcpy(pos
, rates
, supp_rates_len
);
1198 pos
+= supp_rates_len
;
1200 /* insert "request information" if in custom IEs */
1202 static const u8 before_extrates
[] = {
1204 WLAN_EID_SUPP_RATES
,
1207 noffset
= ieee80211_ie_split(ie
, ie_len
,
1209 ARRAY_SIZE(before_extrates
),
1211 if (end
- pos
< noffset
- offset
)
1213 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1214 pos
+= noffset
- offset
;
1218 ext_rates_len
= num_rates
- supp_rates_len
;
1219 if (ext_rates_len
> 0) {
1220 if (end
- pos
< 2 + ext_rates_len
)
1222 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1223 *pos
++ = ext_rates_len
;
1224 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1225 pos
+= ext_rates_len
;
1228 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1231 *pos
++ = WLAN_EID_DS_PARAMS
;
1233 *pos
++ = ieee80211_frequency_to_channel(
1234 chandef
->chan
->center_freq
);
1237 /* insert custom IEs that go before HT */
1239 static const u8 before_ht
[] = {
1241 WLAN_EID_SUPP_RATES
,
1243 WLAN_EID_EXT_SUPP_RATES
,
1245 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1247 noffset
= ieee80211_ie_split(ie
, ie_len
,
1248 before_ht
, ARRAY_SIZE(before_ht
),
1250 if (end
- pos
< noffset
- offset
)
1252 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1253 pos
+= noffset
- offset
;
1257 if (sband
->ht_cap
.ht_supported
) {
1258 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1260 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1265 * If adding more here, adjust code in main.c
1266 * that calculates local->scan_ies_len.
1269 /* add any remaining custom IEs */
1272 if (end
- pos
< noffset
- offset
)
1274 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1275 pos
+= noffset
- offset
;
1278 if (sband
->vht_cap
.vht_supported
) {
1279 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1281 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1282 sband
->vht_cap
.cap
);
1285 return pos
- buffer
;
1287 WARN_ONCE(1, "not enough space for preq IEs\n");
1288 return pos
- buffer
;
1291 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1292 u8
*dst
, u32 ratemask
,
1293 struct ieee80211_channel
*chan
,
1294 const u8
*ssid
, size_t ssid_len
,
1295 const u8
*ie
, size_t ie_len
,
1298 struct ieee80211_local
*local
= sdata
->local
;
1299 struct cfg80211_chan_def chandef
;
1300 struct sk_buff
*skb
;
1301 struct ieee80211_mgmt
*mgmt
;
1305 * Do not send DS Channel parameter for directed probe requests
1306 * in order to maximize the chance that we get a response. Some
1307 * badly-behaved APs don't respond when this parameter is included.
1309 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1311 chandef
.chan
= NULL
;
1313 chandef
.chan
= chan
;
1315 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1316 ssid
, ssid_len
, 100 + ie_len
);
1320 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1322 ie
, ie_len
, chan
->band
,
1323 ratemask
, &chandef
);
1324 skb_put(skb
, ies_len
);
1327 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1328 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1329 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1332 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1337 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1338 const u8
*ssid
, size_t ssid_len
,
1339 const u8
*ie
, size_t ie_len
,
1340 u32 ratemask
, bool directed
, u32 tx_flags
,
1341 struct ieee80211_channel
*channel
, bool scan
)
1343 struct sk_buff
*skb
;
1345 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, channel
,
1347 ie
, ie_len
, directed
);
1349 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1351 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1353 ieee80211_tx_skb(sdata
, skb
);
1357 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1358 struct ieee802_11_elems
*elems
,
1359 enum ieee80211_band band
, u32
*basic_rates
)
1361 struct ieee80211_supported_band
*sband
;
1362 struct ieee80211_rate
*bitrates
;
1364 u32 supp_rates
, rate_flags
;
1366 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1368 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1369 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1371 if (WARN_ON(!sband
))
1374 bitrates
= sband
->bitrates
;
1375 num_rates
= sband
->n_bitrates
;
1377 for (i
= 0; i
< elems
->supp_rates_len
+
1378 elems
->ext_supp_rates_len
; i
++) {
1382 if (i
< elems
->supp_rates_len
)
1383 rate
= elems
->supp_rates
[i
];
1384 else if (elems
->ext_supp_rates
)
1385 rate
= elems
->ext_supp_rates
1386 [i
- elems
->supp_rates_len
];
1387 own_rate
= 5 * (rate
& 0x7f);
1388 is_basic
= !!(rate
& 0x80);
1390 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1393 for (j
= 0; j
< num_rates
; j
++) {
1395 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1399 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1402 if (brate
== own_rate
) {
1403 supp_rates
|= BIT(j
);
1404 if (basic_rates
&& is_basic
)
1405 *basic_rates
|= BIT(j
);
1412 void ieee80211_stop_device(struct ieee80211_local
*local
)
1414 ieee80211_led_radio(local
, false);
1415 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1417 cancel_work_sync(&local
->reconfig_filter
);
1419 flush_workqueue(local
->workqueue
);
1423 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1424 struct ieee80211_sub_if_data
*sdata
)
1426 struct ieee80211_chanctx_conf
*conf
;
1427 struct ieee80211_chanctx
*ctx
;
1429 if (!local
->use_chanctx
)
1432 mutex_lock(&local
->chanctx_mtx
);
1433 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1434 lockdep_is_held(&local
->chanctx_mtx
));
1436 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1437 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1439 mutex_unlock(&local
->chanctx_mtx
);
1442 int ieee80211_reconfig(struct ieee80211_local
*local
)
1444 struct ieee80211_hw
*hw
= &local
->hw
;
1445 struct ieee80211_sub_if_data
*sdata
;
1446 struct ieee80211_chanctx
*ctx
;
1447 struct sta_info
*sta
;
1449 bool reconfig_due_to_wowlan
= false;
1452 if (local
->suspended
)
1453 local
->resuming
= true;
1455 if (local
->wowlan
) {
1456 res
= drv_resume(local
);
1457 local
->wowlan
= false;
1459 local
->resuming
= false;
1466 * res is 1, which means the driver requested
1467 * to go through a regular reset on wakeup.
1469 reconfig_due_to_wowlan
= true;
1472 /* everything else happens only if HW was up & running */
1473 if (!local
->open_count
)
1477 * Upon resume hardware can sometimes be goofy due to
1478 * various platform / driver / bus issues, so restarting
1479 * the device may at times not work immediately. Propagate
1482 res
= drv_start(local
);
1484 WARN(local
->suspended
, "Hardware became unavailable "
1485 "upon resume. This could be a software issue "
1486 "prior to suspend or a hardware issue.\n");
1490 /* setup fragmentation threshold */
1491 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1493 /* setup RTS threshold */
1494 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1496 /* reset coverage class */
1497 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1499 ieee80211_led_radio(local
, true);
1500 ieee80211_mod_tpt_led_trig(local
,
1501 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1503 /* add interfaces */
1504 sdata
= rtnl_dereference(local
->monitor_sdata
);
1506 /* in HW restart it exists already */
1507 WARN_ON(local
->resuming
);
1508 res
= drv_add_interface(local
, sdata
);
1510 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
1516 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1517 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1518 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1519 ieee80211_sdata_running(sdata
))
1520 res
= drv_add_interface(local
, sdata
);
1523 /* add channel contexts */
1524 if (local
->use_chanctx
) {
1525 mutex_lock(&local
->chanctx_mtx
);
1526 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1527 WARN_ON(drv_add_chanctx(local
, ctx
));
1528 mutex_unlock(&local
->chanctx_mtx
);
1531 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1532 if (!ieee80211_sdata_running(sdata
))
1534 ieee80211_assign_chanctx(local
, sdata
);
1537 sdata
= rtnl_dereference(local
->monitor_sdata
);
1538 if (sdata
&& ieee80211_sdata_running(sdata
))
1539 ieee80211_assign_chanctx(local
, sdata
);
1542 mutex_lock(&local
->sta_mtx
);
1543 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1544 enum ieee80211_sta_state state
;
1549 /* AP-mode stations will be added later */
1550 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1553 for (state
= IEEE80211_STA_NOTEXIST
;
1554 state
< sta
->sta_state
; state
++)
1555 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1558 mutex_unlock(&local
->sta_mtx
);
1560 /* reconfigure tx conf */
1561 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1562 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1563 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1564 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1565 !ieee80211_sdata_running(sdata
))
1568 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1569 drv_conf_tx(local
, sdata
, i
,
1570 &sdata
->tx_conf
[i
]);
1574 /* reconfigure hardware */
1575 ieee80211_hw_config(local
, ~0);
1577 ieee80211_configure_filter(local
);
1579 /* Finally also reconfigure all the BSS information */
1580 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1583 if (!ieee80211_sdata_running(sdata
))
1586 /* common change flags for all interface types */
1587 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1588 BSS_CHANGED_ERP_PREAMBLE
|
1589 BSS_CHANGED_ERP_SLOT
|
1591 BSS_CHANGED_BASIC_RATES
|
1592 BSS_CHANGED_BEACON_INT
|
1597 BSS_CHANGED_TXPOWER
;
1599 switch (sdata
->vif
.type
) {
1600 case NL80211_IFTYPE_STATION
:
1601 changed
|= BSS_CHANGED_ASSOC
|
1602 BSS_CHANGED_ARP_FILTER
|
1605 /* Re-send beacon info report to the driver */
1606 if (sdata
->u
.mgd
.have_beacon
)
1607 changed
|= BSS_CHANGED_BEACON_INFO
;
1610 ieee80211_bss_info_change_notify(sdata
, changed
);
1611 sdata_unlock(sdata
);
1613 case NL80211_IFTYPE_ADHOC
:
1614 changed
|= BSS_CHANGED_IBSS
;
1616 case NL80211_IFTYPE_AP
:
1617 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1619 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1620 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1622 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1623 drv_start_ap(local
, sdata
);
1627 case NL80211_IFTYPE_MESH_POINT
:
1628 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1629 changed
|= BSS_CHANGED_BEACON
|
1630 BSS_CHANGED_BEACON_ENABLED
;
1631 ieee80211_bss_info_change_notify(sdata
, changed
);
1634 case NL80211_IFTYPE_WDS
:
1636 case NL80211_IFTYPE_AP_VLAN
:
1637 case NL80211_IFTYPE_MONITOR
:
1638 /* ignore virtual */
1640 case NL80211_IFTYPE_P2P_DEVICE
:
1641 changed
= BSS_CHANGED_IDLE
;
1643 case NL80211_IFTYPE_UNSPECIFIED
:
1644 case NUM_NL80211_IFTYPES
:
1645 case NL80211_IFTYPE_P2P_CLIENT
:
1646 case NL80211_IFTYPE_P2P_GO
:
1652 ieee80211_recalc_ps(local
, -1);
1655 * The sta might be in psm against the ap (e.g. because
1656 * this was the state before a hw restart), so we
1657 * explicitly send a null packet in order to make sure
1658 * it'll sync against the ap (and get out of psm).
1660 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1661 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1662 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1664 if (!sdata
->u
.mgd
.associated
)
1667 ieee80211_send_nullfunc(local
, sdata
, 0);
1671 /* APs are now beaconing, add back stations */
1672 mutex_lock(&local
->sta_mtx
);
1673 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1674 enum ieee80211_sta_state state
;
1679 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1682 for (state
= IEEE80211_STA_NOTEXIST
;
1683 state
< sta
->sta_state
; state
++)
1684 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1687 mutex_unlock(&local
->sta_mtx
);
1690 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1691 if (ieee80211_sdata_running(sdata
))
1692 ieee80211_enable_keys(sdata
);
1695 local
->in_reconfig
= false;
1698 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
1699 ieee80211_add_virtual_monitor(local
);
1702 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1703 * sessions can be established after a resume.
1705 * Also tear down aggregation sessions since reconfiguring
1706 * them in a hardware restart scenario is not easily done
1707 * right now, and the hardware will have lost information
1708 * about the sessions, but we and the AP still think they
1709 * are active. This is really a workaround though.
1711 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1712 mutex_lock(&local
->sta_mtx
);
1714 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1715 ieee80211_sta_tear_down_BA_sessions(
1716 sta
, AGG_STOP_LOCAL_REQUEST
);
1717 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1720 mutex_unlock(&local
->sta_mtx
);
1723 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
1724 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1727 * If this is for hw restart things are still running.
1728 * We may want to change that later, however.
1730 if (!local
->suspended
|| reconfig_due_to_wowlan
)
1731 drv_restart_complete(local
);
1733 if (!local
->suspended
)
1737 /* first set suspended false, then resuming */
1738 local
->suspended
= false;
1740 local
->resuming
= false;
1742 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1743 if (!ieee80211_sdata_running(sdata
))
1745 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1746 ieee80211_sta_restart(sdata
);
1749 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1756 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1758 struct ieee80211_sub_if_data
*sdata
;
1759 struct ieee80211_local
*local
;
1760 struct ieee80211_key
*key
;
1765 sdata
= vif_to_sdata(vif
);
1766 local
= sdata
->local
;
1768 if (WARN_ON(!local
->resuming
))
1771 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1774 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1776 mutex_lock(&local
->key_mtx
);
1777 list_for_each_entry(key
, &sdata
->key_list
, list
)
1778 key
->flags
|= KEY_FLAG_TAINTED
;
1779 mutex_unlock(&local
->key_mtx
);
1781 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1783 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
1785 struct ieee80211_local
*local
= sdata
->local
;
1786 struct ieee80211_chanctx_conf
*chanctx_conf
;
1787 struct ieee80211_chanctx
*chanctx
;
1789 mutex_lock(&local
->chanctx_mtx
);
1791 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1792 lockdep_is_held(&local
->chanctx_mtx
));
1794 if (WARN_ON_ONCE(!chanctx_conf
))
1797 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1798 ieee80211_recalc_smps_chanctx(local
, chanctx
);
1800 mutex_unlock(&local
->chanctx_mtx
);
1803 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1807 for (i
= 0; i
< n_ids
; i
++)
1814 * ieee80211_ie_split - split an IE buffer according to ordering
1816 * @ies: the IE buffer
1817 * @ielen: the length of the IE buffer
1818 * @ids: an array with element IDs that are allowed before
1820 * @n_ids: the size of the element ID array
1821 * @offset: offset where to start splitting in the buffer
1823 * This function splits an IE buffer by updating the @offset
1824 * variable to point to the location where the buffer should be
1827 * It assumes that the given IE buffer is well-formed, this
1828 * has to be guaranteed by the caller!
1830 * It also assumes that the IEs in the buffer are ordered
1831 * correctly, if not the result of using this function will not
1832 * be ordered correctly either, i.e. it does no reordering.
1834 * The function returns the offset where the next part of the
1835 * buffer starts, which may be @ielen if the entire (remainder)
1836 * of the buffer should be used.
1838 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1839 const u8
*ids
, int n_ids
, size_t offset
)
1841 size_t pos
= offset
;
1843 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1844 pos
+= 2 + ies
[pos
+ 1];
1849 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1851 size_t pos
= offset
;
1853 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1854 pos
+= 2 + ies
[pos
+ 1];
1859 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1863 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1865 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1869 * Scale up threshold values before storing it, as the RSSI averaging
1870 * algorithm uses a scaled up value as well. Change this scaling
1871 * factor if the RSSI averaging algorithm changes.
1873 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1874 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1877 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1881 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1883 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1884 rssi_min_thold
> rssi_max_thold
);
1886 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1889 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1891 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1893 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1895 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1897 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1899 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1904 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1905 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1906 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1908 /* capability flags */
1909 tmp
= cpu_to_le16(cap
);
1910 memcpy(pos
, &tmp
, sizeof(u16
));
1913 /* AMPDU parameters */
1914 *pos
++ = ht_cap
->ampdu_factor
|
1915 (ht_cap
->ampdu_density
<<
1916 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1919 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1920 pos
+= sizeof(ht_cap
->mcs
);
1922 /* extended capabilities */
1923 pos
+= sizeof(__le16
);
1925 /* BF capabilities */
1926 pos
+= sizeof(__le32
);
1928 /* antenna selection */
1934 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
1939 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
1940 *pos
++ = sizeof(struct ieee80211_vht_cap
);
1941 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
1943 /* capability flags */
1944 tmp
= cpu_to_le32(cap
);
1945 memcpy(pos
, &tmp
, sizeof(u32
));
1949 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
1950 pos
+= sizeof(vht_cap
->vht_mcs
);
1955 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1956 const struct cfg80211_chan_def
*chandef
,
1959 struct ieee80211_ht_operation
*ht_oper
;
1960 /* Build HT Information */
1961 *pos
++ = WLAN_EID_HT_OPERATION
;
1962 *pos
++ = sizeof(struct ieee80211_ht_operation
);
1963 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
1964 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
1965 chandef
->chan
->center_freq
);
1966 switch (chandef
->width
) {
1967 case NL80211_CHAN_WIDTH_160
:
1968 case NL80211_CHAN_WIDTH_80P80
:
1969 case NL80211_CHAN_WIDTH_80
:
1970 case NL80211_CHAN_WIDTH_40
:
1971 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
1972 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1974 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1977 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1980 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
1981 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
1982 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
1983 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1985 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
1986 ht_oper
->stbc_param
= 0x0000;
1988 /* It seems that Basic MCS set and Supported MCS set
1989 are identical for the first 10 bytes */
1990 memset(&ht_oper
->basic_set
, 0, 16);
1991 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
1993 return pos
+ sizeof(struct ieee80211_ht_operation
);
1996 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
1997 const struct ieee80211_ht_operation
*ht_oper
,
1998 struct cfg80211_chan_def
*chandef
)
2000 enum nl80211_channel_type channel_type
;
2003 cfg80211_chandef_create(chandef
, control_chan
,
2004 NL80211_CHAN_NO_HT
);
2008 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2009 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2010 channel_type
= NL80211_CHAN_HT20
;
2012 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2013 channel_type
= NL80211_CHAN_HT40PLUS
;
2015 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2016 channel_type
= NL80211_CHAN_HT40MINUS
;
2019 channel_type
= NL80211_CHAN_NO_HT
;
2022 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2025 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2026 const struct ieee80211_supported_band
*sband
,
2027 const u8
*srates
, int srates_len
, u32
*rates
)
2029 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2030 int shift
= ieee80211_chandef_get_shift(chandef
);
2031 struct ieee80211_rate
*br
;
2032 int brate
, rate
, i
, j
, count
= 0;
2036 for (i
= 0; i
< srates_len
; i
++) {
2037 rate
= srates
[i
] & 0x7f;
2039 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2040 br
= &sband
->bitrates
[j
];
2041 if ((rate_flags
& br
->flags
) != rate_flags
)
2044 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2045 if (brate
== rate
) {
2055 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2056 struct sk_buff
*skb
, bool need_basic
,
2057 enum ieee80211_band band
)
2059 struct ieee80211_local
*local
= sdata
->local
;
2060 struct ieee80211_supported_band
*sband
;
2063 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2066 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2067 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2068 sband
= local
->hw
.wiphy
->bands
[band
];
2070 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2071 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2078 if (skb_tailroom(skb
) < rates
+ 2)
2081 pos
= skb_put(skb
, rates
+ 2);
2082 *pos
++ = WLAN_EID_SUPP_RATES
;
2084 for (i
= 0; i
< rates
; i
++) {
2086 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2089 if (need_basic
&& basic_rates
& BIT(i
))
2091 rate
= sband
->bitrates
[i
].bitrate
;
2092 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2094 *pos
++ = basic
| (u8
) rate
;
2100 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2101 struct sk_buff
*skb
, bool need_basic
,
2102 enum ieee80211_band band
)
2104 struct ieee80211_local
*local
= sdata
->local
;
2105 struct ieee80211_supported_band
*sband
;
2107 u8 i
, exrates
, *pos
;
2108 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2111 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2112 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2114 sband
= local
->hw
.wiphy
->bands
[band
];
2116 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2117 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2127 if (skb_tailroom(skb
) < exrates
+ 2)
2131 pos
= skb_put(skb
, exrates
+ 2);
2132 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2134 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2136 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2139 if (need_basic
&& basic_rates
& BIT(i
))
2141 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2143 *pos
++ = basic
| (u8
) rate
;
2149 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2151 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2152 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2154 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2155 /* non-managed type inferfaces */
2158 return ifmgd
->ave_beacon_signal
/ 16;
2160 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2162 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2167 /* TODO: consider rx_highest */
2169 if (mcs
->rx_mask
[3])
2171 if (mcs
->rx_mask
[2])
2173 if (mcs
->rx_mask
[1])
2179 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2180 * @local: mac80211 hw info struct
2181 * @status: RX status
2182 * @mpdu_len: total MPDU length (including FCS)
2183 * @mpdu_offset: offset into MPDU to calculate timestamp at
2185 * This function calculates the RX timestamp at the given MPDU offset, taking
2186 * into account what the RX timestamp was. An offset of 0 will just normalize
2187 * the timestamp to TSF at beginning of MPDU reception.
2189 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2190 struct ieee80211_rx_status
*status
,
2191 unsigned int mpdu_len
,
2192 unsigned int mpdu_offset
)
2194 u64 ts
= status
->mactime
;
2195 struct rate_info ri
;
2198 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2201 memset(&ri
, 0, sizeof(ri
));
2203 /* Fill cfg80211 rate info */
2204 if (status
->flag
& RX_FLAG_HT
) {
2205 ri
.mcs
= status
->rate_idx
;
2206 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2207 if (status
->flag
& RX_FLAG_40MHZ
)
2208 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2209 if (status
->flag
& RX_FLAG_SHORT_GI
)
2210 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2211 } else if (status
->flag
& RX_FLAG_VHT
) {
2212 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2213 ri
.mcs
= status
->rate_idx
;
2214 ri
.nss
= status
->vht_nss
;
2215 if (status
->flag
& RX_FLAG_40MHZ
)
2216 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2217 if (status
->flag
& RX_FLAG_80MHZ
)
2218 ri
.flags
|= RATE_INFO_FLAGS_80_MHZ_WIDTH
;
2219 if (status
->flag
& RX_FLAG_80P80MHZ
)
2220 ri
.flags
|= RATE_INFO_FLAGS_80P80_MHZ_WIDTH
;
2221 if (status
->flag
& RX_FLAG_160MHZ
)
2222 ri
.flags
|= RATE_INFO_FLAGS_160_MHZ_WIDTH
;
2223 if (status
->flag
& RX_FLAG_SHORT_GI
)
2224 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2226 struct ieee80211_supported_band
*sband
;
2230 if (status
->flag
& RX_FLAG_10MHZ
)
2232 if (status
->flag
& RX_FLAG_5MHZ
)
2235 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2236 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2237 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2240 rate
= cfg80211_calculate_bitrate(&ri
);
2241 if (WARN_ONCE(!rate
,
2242 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2243 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2246 /* rewind from end of MPDU */
2247 if (status
->flag
& RX_FLAG_MACTIME_END
)
2248 ts
-= mpdu_len
* 8 * 10 / rate
;
2250 ts
+= mpdu_offset
* 8 * 10 / rate
;
2255 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2257 struct ieee80211_sub_if_data
*sdata
;
2259 mutex_lock(&local
->iflist_mtx
);
2260 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2261 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
2263 if (sdata
->wdev
.cac_started
) {
2264 ieee80211_vif_release_channel(sdata
);
2265 cfg80211_cac_event(sdata
->dev
,
2266 NL80211_RADAR_CAC_ABORTED
,
2270 mutex_unlock(&local
->iflist_mtx
);
2273 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2275 struct ieee80211_local
*local
=
2276 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2277 struct cfg80211_chan_def chandef
;
2279 ieee80211_dfs_cac_cancel(local
);
2281 if (local
->use_chanctx
)
2282 /* currently not handled */
2285 chandef
= local
->hw
.conf
.chandef
;
2286 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2290 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2292 struct ieee80211_local
*local
= hw_to_local(hw
);
2294 trace_api_radar_detected(local
);
2296 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2298 EXPORT_SYMBOL(ieee80211_radar_detected
);