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 const void *const 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(struct ieee80211_local
*local
,
439 struct sk_buff_head
*skbs
)
441 struct ieee80211_hw
*hw
= &local
->hw
;
446 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
447 while ((skb
= skb_dequeue(skbs
))) {
448 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
450 if (WARN_ON(!info
->control
.vif
)) {
451 ieee80211_free_txskb(&local
->hw
, skb
);
455 queue
= info
->hw_queue
;
457 __ieee80211_stop_queue(hw
, queue
,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
460 __skb_queue_tail(&local
->pending
[queue
], skb
);
463 for (i
= 0; i
< hw
->queues
; i
++)
464 __ieee80211_wake_queue(hw
, i
,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
466 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
469 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
470 unsigned long queues
,
471 enum queue_stop_reason reason
)
473 struct ieee80211_local
*local
= hw_to_local(hw
);
477 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
479 for_each_set_bit(i
, &queues
, hw
->queues
)
480 __ieee80211_stop_queue(hw
, i
, reason
);
482 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
485 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
487 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
488 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
490 EXPORT_SYMBOL(ieee80211_stop_queues
);
492 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
494 struct ieee80211_local
*local
= hw_to_local(hw
);
498 if (WARN_ON(queue
>= hw
->queues
))
501 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
502 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
503 &local
->queue_stop_reasons
[queue
]);
504 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
507 EXPORT_SYMBOL(ieee80211_queue_stopped
);
509 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
510 unsigned long queues
,
511 enum queue_stop_reason reason
)
513 struct ieee80211_local
*local
= hw_to_local(hw
);
517 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
519 for_each_set_bit(i
, &queues
, hw
->queues
)
520 __ieee80211_wake_queue(hw
, i
, reason
);
522 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
525 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
527 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
530 EXPORT_SYMBOL(ieee80211_wake_queues
);
532 void ieee80211_flush_queues(struct ieee80211_local
*local
,
533 struct ieee80211_sub_if_data
*sdata
)
537 if (!local
->ops
->flush
)
540 if (sdata
&& local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
545 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
546 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
547 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
548 queues
|= BIT(sdata
->vif
.cab_queue
);
551 queues
= BIT(local
->hw
.queues
) - 1;
554 ieee80211_stop_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
555 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
557 drv_flush(local
, sdata
, queues
, false);
559 ieee80211_wake_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
560 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
563 static void __iterate_active_interfaces(struct ieee80211_local
*local
,
565 void (*iterator
)(void *data
, u8
*mac
,
566 struct ieee80211_vif
*vif
),
569 struct ieee80211_sub_if_data
*sdata
;
571 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
572 switch (sdata
->vif
.type
) {
573 case NL80211_IFTYPE_MONITOR
:
574 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
577 case NL80211_IFTYPE_AP_VLAN
:
582 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
583 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
585 if (ieee80211_sdata_running(sdata
))
586 iterator(data
, sdata
->vif
.addr
,
590 sdata
= rcu_dereference_check(local
->monitor_sdata
,
591 lockdep_is_held(&local
->iflist_mtx
) ||
592 lockdep_rtnl_is_held());
594 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
595 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
596 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
599 void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw
*hw
, u32 iter_flags
,
601 void (*iterator
)(void *data
, u8
*mac
,
602 struct ieee80211_vif
*vif
),
605 struct ieee80211_local
*local
= hw_to_local(hw
);
607 mutex_lock(&local
->iflist_mtx
);
608 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
609 mutex_unlock(&local
->iflist_mtx
);
611 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
613 void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw
*hw
, u32 iter_flags
,
615 void (*iterator
)(void *data
, u8
*mac
,
616 struct ieee80211_vif
*vif
),
619 struct ieee80211_local
*local
= hw_to_local(hw
);
622 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
625 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
627 void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw
*hw
, u32 iter_flags
,
629 void (*iterator
)(void *data
, u8
*mac
,
630 struct ieee80211_vif
*vif
),
633 struct ieee80211_local
*local
= hw_to_local(hw
);
637 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
639 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl
);
641 struct ieee80211_vif
*wdev_to_ieee80211_vif(struct wireless_dev
*wdev
)
643 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
645 if (!ieee80211_sdata_running(sdata
) ||
646 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
650 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif
);
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
659 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
661 if (WARN(local
->suspended
&& !local
->resuming
,
662 "queueing ieee80211 work while going to suspend\n"))
668 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
670 struct ieee80211_local
*local
= hw_to_local(hw
);
672 if (!ieee80211_can_queue_work(local
))
675 queue_work(local
->workqueue
, work
);
677 EXPORT_SYMBOL(ieee80211_queue_work
);
679 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
680 struct delayed_work
*dwork
,
683 struct ieee80211_local
*local
= hw_to_local(hw
);
685 if (!ieee80211_can_queue_work(local
))
688 queue_delayed_work(local
->workqueue
, dwork
, delay
);
690 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
692 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
693 struct ieee802_11_elems
*elems
,
697 const u8
*pos
= start
;
698 bool calc_crc
= filter
!= 0;
699 DECLARE_BITMAP(seen_elems
, 256);
702 bitmap_zero(seen_elems
, 256);
703 memset(elems
, 0, sizeof(*elems
));
704 elems
->ie_start
= start
;
705 elems
->total_len
= len
;
709 bool elem_parse_failed
;
716 elems
->parse_error
= true;
722 case WLAN_EID_SUPP_RATES
:
723 case WLAN_EID_FH_PARAMS
:
724 case WLAN_EID_DS_PARAMS
:
725 case WLAN_EID_CF_PARAMS
:
727 case WLAN_EID_IBSS_PARAMS
:
728 case WLAN_EID_CHALLENGE
:
730 case WLAN_EID_ERP_INFO
:
731 case WLAN_EID_EXT_SUPP_RATES
:
732 case WLAN_EID_HT_CAPABILITY
:
733 case WLAN_EID_HT_OPERATION
:
734 case WLAN_EID_VHT_CAPABILITY
:
735 case WLAN_EID_VHT_OPERATION
:
736 case WLAN_EID_MESH_ID
:
737 case WLAN_EID_MESH_CONFIG
:
738 case WLAN_EID_PEER_MGMT
:
743 case WLAN_EID_CHANNEL_SWITCH
:
744 case WLAN_EID_EXT_CHANSWITCH_ANN
:
745 case WLAN_EID_COUNTRY
:
746 case WLAN_EID_PWR_CONSTRAINT
:
747 case WLAN_EID_TIMEOUT_INTERVAL
:
748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
750 case WLAN_EID_CHAN_SWITCH_PARAM
:
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
755 if (test_bit(id
, seen_elems
)) {
756 elems
->parse_error
= true;
764 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
765 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
767 elem_parse_failed
= false;
772 elems
->ssid_len
= elen
;
774 case WLAN_EID_SUPP_RATES
:
775 elems
->supp_rates
= pos
;
776 elems
->supp_rates_len
= elen
;
778 case WLAN_EID_DS_PARAMS
:
780 elems
->ds_params
= pos
;
782 elem_parse_failed
= true;
785 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
786 elems
->tim
= (void *)pos
;
787 elems
->tim_len
= elen
;
789 elem_parse_failed
= true;
791 case WLAN_EID_CHALLENGE
:
792 elems
->challenge
= pos
;
793 elems
->challenge_len
= elen
;
795 case WLAN_EID_VENDOR_SPECIFIC
:
796 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
798 /* Microsoft OUI (00:50:F2) */
801 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
803 if (elen
>= 5 && pos
[3] == 2) {
804 /* OUI Type 2 - WMM IE */
806 elems
->wmm_info
= pos
;
807 elems
->wmm_info_len
= elen
;
808 } else if (pos
[4] == 1) {
809 elems
->wmm_param
= pos
;
810 elems
->wmm_param_len
= elen
;
817 elems
->rsn_len
= elen
;
819 case WLAN_EID_ERP_INFO
:
821 elems
->erp_info
= pos
;
823 elem_parse_failed
= true;
825 case WLAN_EID_EXT_SUPP_RATES
:
826 elems
->ext_supp_rates
= pos
;
827 elems
->ext_supp_rates_len
= elen
;
829 case WLAN_EID_HT_CAPABILITY
:
830 if (elen
>= sizeof(struct ieee80211_ht_cap
))
831 elems
->ht_cap_elem
= (void *)pos
;
833 elem_parse_failed
= true;
835 case WLAN_EID_HT_OPERATION
:
836 if (elen
>= sizeof(struct ieee80211_ht_operation
))
837 elems
->ht_operation
= (void *)pos
;
839 elem_parse_failed
= true;
841 case WLAN_EID_VHT_CAPABILITY
:
842 if (elen
>= sizeof(struct ieee80211_vht_cap
))
843 elems
->vht_cap_elem
= (void *)pos
;
845 elem_parse_failed
= true;
847 case WLAN_EID_VHT_OPERATION
:
848 if (elen
>= sizeof(struct ieee80211_vht_operation
))
849 elems
->vht_operation
= (void *)pos
;
851 elem_parse_failed
= true;
853 case WLAN_EID_OPMODE_NOTIF
:
855 elems
->opmode_notif
= pos
;
857 elem_parse_failed
= true;
859 case WLAN_EID_MESH_ID
:
860 elems
->mesh_id
= pos
;
861 elems
->mesh_id_len
= elen
;
863 case WLAN_EID_MESH_CONFIG
:
864 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
865 elems
->mesh_config
= (void *)pos
;
867 elem_parse_failed
= true;
869 case WLAN_EID_PEER_MGMT
:
870 elems
->peering
= pos
;
871 elems
->peering_len
= elen
;
873 case WLAN_EID_MESH_AWAKE_WINDOW
:
875 elems
->awake_window
= (void *)pos
;
879 elems
->preq_len
= elen
;
883 elems
->prep_len
= elen
;
887 elems
->perr_len
= elen
;
890 if (elen
>= sizeof(struct ieee80211_rann_ie
))
891 elems
->rann
= (void *)pos
;
893 elem_parse_failed
= true;
895 case WLAN_EID_CHANNEL_SWITCH
:
896 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
897 elem_parse_failed
= true;
900 elems
->ch_switch_ie
= (void *)pos
;
902 case WLAN_EID_EXT_CHANSWITCH_ANN
:
903 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
904 elem_parse_failed
= true;
907 elems
->ext_chansw_ie
= (void *)pos
;
909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
910 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
911 elem_parse_failed
= true;
914 elems
->sec_chan_offs
= (void *)pos
;
916 case WLAN_EID_CHAN_SWITCH_PARAM
:
918 sizeof(*elems
->mesh_chansw_params_ie
)) {
919 elem_parse_failed
= true;
922 elems
->mesh_chansw_params_ie
= (void *)pos
;
924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
926 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
927 elem_parse_failed
= true;
930 elems
->wide_bw_chansw_ie
= (void *)pos
;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
934 elem_parse_failed
= true;
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
942 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
945 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
946 elems
->wide_bw_chansw_ie
=
949 elem_parse_failed
= true;
952 case WLAN_EID_COUNTRY
:
953 elems
->country_elem
= pos
;
954 elems
->country_elem_len
= elen
;
956 case WLAN_EID_PWR_CONSTRAINT
:
958 elem_parse_failed
= true;
961 elems
->pwr_constr_elem
= pos
;
963 case WLAN_EID_TIMEOUT_INTERVAL
:
964 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
965 elems
->timeout_int
= (void *)pos
;
967 elem_parse_failed
= true;
973 if (elem_parse_failed
)
974 elems
->parse_error
= true;
976 __set_bit(id
, seen_elems
);
983 elems
->parse_error
= true;
988 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
991 struct ieee80211_local
*local
= sdata
->local
;
992 struct ieee80211_tx_queue_params qparam
;
993 struct ieee80211_chanctx_conf
*chanctx_conf
;
995 bool use_11b
, enable_qos
;
998 if (!local
->ops
->conf_tx
)
1001 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1004 memset(&qparam
, 0, sizeof(qparam
));
1007 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1008 use_11b
= (chanctx_conf
&&
1009 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1010 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1018 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
1020 /* Set defaults according to 802.11-2007 Table 7-37 */
1027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam
.cw_max
= aCWmax
;
1029 qparam
.cw_min
= aCWmin
;
1033 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1034 /* Update if QoS is enabled. */
1037 case IEEE80211_AC_BK
:
1038 qparam
.cw_max
= aCWmax
;
1039 qparam
.cw_min
= aCWmin
;
1043 /* never happens but let's not leave undefined */
1045 case IEEE80211_AC_BE
:
1046 qparam
.cw_max
= aCWmax
;
1047 qparam
.cw_min
= aCWmin
;
1051 case IEEE80211_AC_VI
:
1052 qparam
.cw_max
= aCWmin
;
1053 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1055 qparam
.txop
= 6016/32;
1057 qparam
.txop
= 3008/32;
1060 case IEEE80211_AC_VO
:
1061 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1062 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1064 qparam
.txop
= 3264/32;
1066 qparam
.txop
= 1504/32;
1072 qparam
.uapsd
= false;
1074 sdata
->tx_conf
[ac
] = qparam
;
1075 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1078 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1079 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1080 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1082 ieee80211_bss_info_change_notify(sdata
,
1087 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1088 u16 transaction
, u16 auth_alg
, u16 status
,
1089 const u8
*extra
, size_t extra_len
, const u8
*da
,
1090 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1093 struct ieee80211_local
*local
= sdata
->local
;
1094 struct sk_buff
*skb
;
1095 struct ieee80211_mgmt
*mgmt
;
1098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24 + 6 + extra_len
);
1103 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1105 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1106 memset(mgmt
, 0, 24 + 6);
1107 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1108 IEEE80211_STYPE_AUTH
);
1109 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1110 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1111 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1112 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1113 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1114 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1116 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1118 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1119 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1120 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1124 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1126 ieee80211_tx_skb(sdata
, skb
);
1129 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1130 const u8
*bssid
, u16 stype
, u16 reason
,
1131 bool send_frame
, u8
*frame_buf
)
1133 struct ieee80211_local
*local
= sdata
->local
;
1134 struct sk_buff
*skb
;
1135 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1138 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1139 mgmt
->duration
= 0; /* initialize only */
1140 mgmt
->seq_ctrl
= 0; /* initialize only */
1141 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1142 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1143 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1144 /* u.deauth.reason_code == u.disassoc.reason_code */
1145 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1148 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1149 IEEE80211_DEAUTH_FRAME_LEN
);
1153 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1156 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1157 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1159 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1160 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1161 IEEE80211_SKB_CB(skb
)->flags
|=
1162 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1164 ieee80211_tx_skb(sdata
, skb
);
1168 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1169 size_t buffer_len
, const u8
*ie
, size_t ie_len
,
1170 enum ieee80211_band band
, u32 rate_mask
,
1171 struct cfg80211_chan_def
*chandef
)
1173 struct ieee80211_supported_band
*sband
;
1174 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1175 size_t offset
= 0, noffset
;
1176 int supp_rates_len
, i
;
1183 sband
= local
->hw
.wiphy
->bands
[band
];
1184 if (WARN_ON_ONCE(!sband
))
1187 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1188 shift
= ieee80211_chandef_get_shift(chandef
);
1191 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1192 if ((BIT(i
) & rate_mask
) == 0)
1193 continue; /* skip rate */
1194 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1197 rates
[num_rates
++] =
1198 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1202 supp_rates_len
= min_t(int, num_rates
, 8);
1204 if (end
- pos
< 2 + supp_rates_len
)
1206 *pos
++ = WLAN_EID_SUPP_RATES
;
1207 *pos
++ = supp_rates_len
;
1208 memcpy(pos
, rates
, supp_rates_len
);
1209 pos
+= supp_rates_len
;
1211 /* insert "request information" if in custom IEs */
1213 static const u8 before_extrates
[] = {
1215 WLAN_EID_SUPP_RATES
,
1218 noffset
= ieee80211_ie_split(ie
, ie_len
,
1220 ARRAY_SIZE(before_extrates
),
1222 if (end
- pos
< noffset
- offset
)
1224 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1225 pos
+= noffset
- offset
;
1229 ext_rates_len
= num_rates
- supp_rates_len
;
1230 if (ext_rates_len
> 0) {
1231 if (end
- pos
< 2 + ext_rates_len
)
1233 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1234 *pos
++ = ext_rates_len
;
1235 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1236 pos
+= ext_rates_len
;
1239 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1242 *pos
++ = WLAN_EID_DS_PARAMS
;
1244 *pos
++ = ieee80211_frequency_to_channel(
1245 chandef
->chan
->center_freq
);
1248 /* insert custom IEs that go before HT */
1250 static const u8 before_ht
[] = {
1252 WLAN_EID_SUPP_RATES
,
1254 WLAN_EID_EXT_SUPP_RATES
,
1256 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1258 noffset
= ieee80211_ie_split(ie
, ie_len
,
1259 before_ht
, ARRAY_SIZE(before_ht
),
1261 if (end
- pos
< noffset
- offset
)
1263 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1264 pos
+= noffset
- offset
;
1268 if (sband
->ht_cap
.ht_supported
) {
1269 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1271 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1276 * If adding more here, adjust code in main.c
1277 * that calculates local->scan_ies_len.
1280 /* insert custom IEs that go before VHT */
1282 static const u8 before_vht
[] = {
1284 WLAN_EID_SUPP_RATES
,
1286 WLAN_EID_EXT_SUPP_RATES
,
1288 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1289 WLAN_EID_HT_CAPABILITY
,
1290 WLAN_EID_BSS_COEX_2040
,
1291 WLAN_EID_EXT_CAPABILITY
,
1293 WLAN_EID_CHANNEL_USAGE
,
1294 WLAN_EID_INTERWORKING
,
1295 /* mesh ID can't happen here */
1296 /* 60 GHz can't happen here right now */
1298 noffset
= ieee80211_ie_split(ie
, ie_len
,
1299 before_vht
, ARRAY_SIZE(before_vht
),
1301 if (end
- pos
< noffset
- offset
)
1303 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1304 pos
+= noffset
- offset
;
1308 if (sband
->vht_cap
.vht_supported
) {
1309 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1311 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1312 sband
->vht_cap
.cap
);
1315 /* add any remaining custom IEs */
1318 if (end
- pos
< noffset
- offset
)
1320 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1321 pos
+= noffset
- offset
;
1324 return pos
- buffer
;
1326 WARN_ONCE(1, "not enough space for preq IEs\n");
1327 return pos
- buffer
;
1330 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1331 u8
*dst
, u32 ratemask
,
1332 struct ieee80211_channel
*chan
,
1333 const u8
*ssid
, size_t ssid_len
,
1334 const u8
*ie
, size_t ie_len
,
1337 struct ieee80211_local
*local
= sdata
->local
;
1338 struct cfg80211_chan_def chandef
;
1339 struct sk_buff
*skb
;
1340 struct ieee80211_mgmt
*mgmt
;
1344 * Do not send DS Channel parameter for directed probe requests
1345 * in order to maximize the chance that we get a response. Some
1346 * badly-behaved APs don't respond when this parameter is included.
1348 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1350 chandef
.chan
= NULL
;
1352 chandef
.chan
= chan
;
1354 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1355 ssid
, ssid_len
, 100 + ie_len
);
1359 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1361 ie
, ie_len
, chan
->band
,
1362 ratemask
, &chandef
);
1363 skb_put(skb
, ies_len
);
1366 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1367 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1368 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1371 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1376 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1377 const u8
*ssid
, size_t ssid_len
,
1378 const u8
*ie
, size_t ie_len
,
1379 u32 ratemask
, bool directed
, u32 tx_flags
,
1380 struct ieee80211_channel
*channel
, bool scan
)
1382 struct sk_buff
*skb
;
1384 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, channel
,
1386 ie
, ie_len
, directed
);
1388 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1390 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1392 ieee80211_tx_skb(sdata
, skb
);
1396 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1397 struct ieee802_11_elems
*elems
,
1398 enum ieee80211_band band
, u32
*basic_rates
)
1400 struct ieee80211_supported_band
*sband
;
1402 u32 supp_rates
, rate_flags
;
1404 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1406 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1407 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1409 if (WARN_ON(!sband
))
1412 num_rates
= sband
->n_bitrates
;
1414 for (i
= 0; i
< elems
->supp_rates_len
+
1415 elems
->ext_supp_rates_len
; i
++) {
1419 if (i
< elems
->supp_rates_len
)
1420 rate
= elems
->supp_rates
[i
];
1421 else if (elems
->ext_supp_rates
)
1422 rate
= elems
->ext_supp_rates
1423 [i
- elems
->supp_rates_len
];
1424 own_rate
= 5 * (rate
& 0x7f);
1425 is_basic
= !!(rate
& 0x80);
1427 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1430 for (j
= 0; j
< num_rates
; j
++) {
1432 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1436 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1439 if (brate
== own_rate
) {
1440 supp_rates
|= BIT(j
);
1441 if (basic_rates
&& is_basic
)
1442 *basic_rates
|= BIT(j
);
1449 void ieee80211_stop_device(struct ieee80211_local
*local
)
1451 ieee80211_led_radio(local
, false);
1452 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1454 cancel_work_sync(&local
->reconfig_filter
);
1456 flush_workqueue(local
->workqueue
);
1460 static void ieee80211_handle_reconfig_failure(struct ieee80211_local
*local
)
1462 struct ieee80211_sub_if_data
*sdata
;
1463 struct ieee80211_chanctx
*ctx
;
1466 * We get here if during resume the device can't be restarted properly.
1467 * We might also get here if this happens during HW reset, which is a
1468 * slightly different situation and we need to drop all connections in
1471 * Ask cfg80211 to turn off all interfaces, this will result in more
1472 * warnings but at least we'll then get into a clean stopped state.
1475 local
->resuming
= false;
1476 local
->suspended
= false;
1477 local
->started
= false;
1479 /* scheduled scan clearly can't be running any more, but tell
1480 * cfg80211 and clear local state
1482 ieee80211_sched_scan_end(local
);
1484 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1485 sdata
->flags
&= ~IEEE80211_SDATA_IN_DRIVER
;
1487 /* Mark channel contexts as not being in the driver any more to avoid
1488 * removing them from the driver during the shutdown process...
1490 mutex_lock(&local
->chanctx_mtx
);
1491 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1492 ctx
->driver_present
= false;
1493 mutex_unlock(&local
->chanctx_mtx
);
1495 cfg80211_shutdown_all_interfaces(local
->hw
.wiphy
);
1498 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1499 struct ieee80211_sub_if_data
*sdata
)
1501 struct ieee80211_chanctx_conf
*conf
;
1502 struct ieee80211_chanctx
*ctx
;
1504 if (!local
->use_chanctx
)
1507 mutex_lock(&local
->chanctx_mtx
);
1508 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1509 lockdep_is_held(&local
->chanctx_mtx
));
1511 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1512 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1514 mutex_unlock(&local
->chanctx_mtx
);
1517 int ieee80211_reconfig(struct ieee80211_local
*local
)
1519 struct ieee80211_hw
*hw
= &local
->hw
;
1520 struct ieee80211_sub_if_data
*sdata
;
1521 struct ieee80211_chanctx
*ctx
;
1522 struct sta_info
*sta
;
1524 bool reconfig_due_to_wowlan
= false;
1525 struct ieee80211_sub_if_data
*sched_scan_sdata
;
1526 bool sched_scan_stopped
= false;
1529 if (local
->suspended
)
1530 local
->resuming
= true;
1532 if (local
->wowlan
) {
1533 res
= drv_resume(local
);
1534 local
->wowlan
= false;
1536 local
->resuming
= false;
1543 * res is 1, which means the driver requested
1544 * to go through a regular reset on wakeup.
1546 reconfig_due_to_wowlan
= true;
1549 /* everything else happens only if HW was up & running */
1550 if (!local
->open_count
)
1554 * Upon resume hardware can sometimes be goofy due to
1555 * various platform / driver / bus issues, so restarting
1556 * the device may at times not work immediately. Propagate
1559 res
= drv_start(local
);
1561 if (local
->suspended
)
1562 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1564 WARN(1, "Hardware became unavailable during restart.\n");
1565 ieee80211_handle_reconfig_failure(local
);
1569 /* setup fragmentation threshold */
1570 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1572 /* setup RTS threshold */
1573 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1575 /* reset coverage class */
1576 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1578 ieee80211_led_radio(local
, true);
1579 ieee80211_mod_tpt_led_trig(local
,
1580 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1582 /* add interfaces */
1583 sdata
= rtnl_dereference(local
->monitor_sdata
);
1585 /* in HW restart it exists already */
1586 WARN_ON(local
->resuming
);
1587 res
= drv_add_interface(local
, sdata
);
1589 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
1595 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1596 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1597 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1598 ieee80211_sdata_running(sdata
))
1599 res
= drv_add_interface(local
, sdata
);
1602 /* add channel contexts */
1603 if (local
->use_chanctx
) {
1604 mutex_lock(&local
->chanctx_mtx
);
1605 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1606 WARN_ON(drv_add_chanctx(local
, ctx
));
1607 mutex_unlock(&local
->chanctx_mtx
);
1609 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1610 if (!ieee80211_sdata_running(sdata
))
1612 ieee80211_assign_chanctx(local
, sdata
);
1615 sdata
= rtnl_dereference(local
->monitor_sdata
);
1616 if (sdata
&& ieee80211_sdata_running(sdata
))
1617 ieee80211_assign_chanctx(local
, sdata
);
1621 mutex_lock(&local
->sta_mtx
);
1622 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1623 enum ieee80211_sta_state state
;
1628 /* AP-mode stations will be added later */
1629 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1632 for (state
= IEEE80211_STA_NOTEXIST
;
1633 state
< sta
->sta_state
; state
++)
1634 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1637 mutex_unlock(&local
->sta_mtx
);
1639 /* reconfigure tx conf */
1640 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1641 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1642 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1643 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1644 !ieee80211_sdata_running(sdata
))
1647 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1648 drv_conf_tx(local
, sdata
, i
,
1649 &sdata
->tx_conf
[i
]);
1653 /* reconfigure hardware */
1654 ieee80211_hw_config(local
, ~0);
1656 ieee80211_configure_filter(local
);
1658 /* Finally also reconfigure all the BSS information */
1659 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1662 if (!ieee80211_sdata_running(sdata
))
1665 /* common change flags for all interface types */
1666 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1667 BSS_CHANGED_ERP_PREAMBLE
|
1668 BSS_CHANGED_ERP_SLOT
|
1670 BSS_CHANGED_BASIC_RATES
|
1671 BSS_CHANGED_BEACON_INT
|
1676 BSS_CHANGED_TXPOWER
;
1678 switch (sdata
->vif
.type
) {
1679 case NL80211_IFTYPE_STATION
:
1680 changed
|= BSS_CHANGED_ASSOC
|
1681 BSS_CHANGED_ARP_FILTER
|
1684 /* Re-send beacon info report to the driver */
1685 if (sdata
->u
.mgd
.have_beacon
)
1686 changed
|= BSS_CHANGED_BEACON_INFO
;
1689 ieee80211_bss_info_change_notify(sdata
, changed
);
1690 sdata_unlock(sdata
);
1692 case NL80211_IFTYPE_ADHOC
:
1693 changed
|= BSS_CHANGED_IBSS
;
1695 case NL80211_IFTYPE_AP
:
1696 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1698 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1699 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1701 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1702 drv_start_ap(local
, sdata
);
1706 case NL80211_IFTYPE_MESH_POINT
:
1707 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1708 changed
|= BSS_CHANGED_BEACON
|
1709 BSS_CHANGED_BEACON_ENABLED
;
1710 ieee80211_bss_info_change_notify(sdata
, changed
);
1713 case NL80211_IFTYPE_WDS
:
1714 case NL80211_IFTYPE_AP_VLAN
:
1715 case NL80211_IFTYPE_MONITOR
:
1716 case NL80211_IFTYPE_P2P_DEVICE
:
1719 case NL80211_IFTYPE_UNSPECIFIED
:
1720 case NUM_NL80211_IFTYPES
:
1721 case NL80211_IFTYPE_P2P_CLIENT
:
1722 case NL80211_IFTYPE_P2P_GO
:
1728 ieee80211_recalc_ps(local
, -1);
1731 * The sta might be in psm against the ap (e.g. because
1732 * this was the state before a hw restart), so we
1733 * explicitly send a null packet in order to make sure
1734 * it'll sync against the ap (and get out of psm).
1736 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1737 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1738 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1740 if (!sdata
->u
.mgd
.associated
)
1743 ieee80211_send_nullfunc(local
, sdata
, 0);
1747 /* APs are now beaconing, add back stations */
1748 mutex_lock(&local
->sta_mtx
);
1749 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1750 enum ieee80211_sta_state state
;
1755 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1758 for (state
= IEEE80211_STA_NOTEXIST
;
1759 state
< sta
->sta_state
; state
++)
1760 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1763 mutex_unlock(&local
->sta_mtx
);
1766 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1767 if (ieee80211_sdata_running(sdata
))
1768 ieee80211_enable_keys(sdata
);
1771 local
->in_reconfig
= false;
1774 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
1775 ieee80211_add_virtual_monitor(local
);
1778 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1779 * sessions can be established after a resume.
1781 * Also tear down aggregation sessions since reconfiguring
1782 * them in a hardware restart scenario is not easily done
1783 * right now, and the hardware will have lost information
1784 * about the sessions, but we and the AP still think they
1785 * are active. This is really a workaround though.
1787 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1788 mutex_lock(&local
->sta_mtx
);
1790 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1791 ieee80211_sta_tear_down_BA_sessions(
1792 sta
, AGG_STOP_LOCAL_REQUEST
);
1793 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1796 mutex_unlock(&local
->sta_mtx
);
1799 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
1800 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1803 * Reconfigure sched scan if it was interrupted by FW restart or
1806 mutex_lock(&local
->mtx
);
1807 sched_scan_sdata
= rcu_dereference_protected(local
->sched_scan_sdata
,
1808 lockdep_is_held(&local
->mtx
));
1809 if (sched_scan_sdata
&& local
->sched_scan_req
)
1811 * Sched scan stopped, but we don't want to report it. Instead,
1812 * we're trying to reschedule.
1814 if (__ieee80211_request_sched_scan_start(sched_scan_sdata
,
1815 local
->sched_scan_req
))
1816 sched_scan_stopped
= true;
1817 mutex_unlock(&local
->mtx
);
1819 if (sched_scan_stopped
)
1820 cfg80211_sched_scan_stopped(local
->hw
.wiphy
);
1823 * If this is for hw restart things are still running.
1824 * We may want to change that later, however.
1826 if (!local
->suspended
|| reconfig_due_to_wowlan
)
1827 drv_restart_complete(local
);
1829 if (!local
->suspended
)
1833 /* first set suspended false, then resuming */
1834 local
->suspended
= false;
1836 local
->resuming
= false;
1838 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1839 if (!ieee80211_sdata_running(sdata
))
1841 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1842 ieee80211_sta_restart(sdata
);
1845 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1853 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1855 struct ieee80211_sub_if_data
*sdata
;
1856 struct ieee80211_local
*local
;
1857 struct ieee80211_key
*key
;
1862 sdata
= vif_to_sdata(vif
);
1863 local
= sdata
->local
;
1865 if (WARN_ON(!local
->resuming
))
1868 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1871 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1873 mutex_lock(&local
->key_mtx
);
1874 list_for_each_entry(key
, &sdata
->key_list
, list
)
1875 key
->flags
|= KEY_FLAG_TAINTED
;
1876 mutex_unlock(&local
->key_mtx
);
1878 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1880 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
1882 struct ieee80211_local
*local
= sdata
->local
;
1883 struct ieee80211_chanctx_conf
*chanctx_conf
;
1884 struct ieee80211_chanctx
*chanctx
;
1886 mutex_lock(&local
->chanctx_mtx
);
1888 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1889 lockdep_is_held(&local
->chanctx_mtx
));
1891 if (WARN_ON_ONCE(!chanctx_conf
))
1894 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1895 ieee80211_recalc_smps_chanctx(local
, chanctx
);
1897 mutex_unlock(&local
->chanctx_mtx
);
1900 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data
*sdata
)
1902 struct ieee80211_local
*local
= sdata
->local
;
1903 struct ieee80211_chanctx_conf
*chanctx_conf
;
1904 struct ieee80211_chanctx
*chanctx
;
1906 mutex_lock(&local
->chanctx_mtx
);
1908 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1909 lockdep_is_held(&local
->chanctx_mtx
));
1911 if (WARN_ON_ONCE(!chanctx_conf
))
1914 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1915 ieee80211_recalc_chanctx_min_def(local
, chanctx
);
1917 mutex_unlock(&local
->chanctx_mtx
);
1920 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1924 for (i
= 0; i
< n_ids
; i
++)
1931 * ieee80211_ie_split - split an IE buffer according to ordering
1933 * @ies: the IE buffer
1934 * @ielen: the length of the IE buffer
1935 * @ids: an array with element IDs that are allowed before
1937 * @n_ids: the size of the element ID array
1938 * @offset: offset where to start splitting in the buffer
1940 * This function splits an IE buffer by updating the @offset
1941 * variable to point to the location where the buffer should be
1944 * It assumes that the given IE buffer is well-formed, this
1945 * has to be guaranteed by the caller!
1947 * It also assumes that the IEs in the buffer are ordered
1948 * correctly, if not the result of using this function will not
1949 * be ordered correctly either, i.e. it does no reordering.
1951 * The function returns the offset where the next part of the
1952 * buffer starts, which may be @ielen if the entire (remainder)
1953 * of the buffer should be used.
1955 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1956 const u8
*ids
, int n_ids
, size_t offset
)
1958 size_t pos
= offset
;
1960 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1961 pos
+= 2 + ies
[pos
+ 1];
1966 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1968 size_t pos
= offset
;
1970 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1971 pos
+= 2 + ies
[pos
+ 1];
1976 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1980 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1982 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1986 * Scale up threshold values before storing it, as the RSSI averaging
1987 * algorithm uses a scaled up value as well. Change this scaling
1988 * factor if the RSSI averaging algorithm changes.
1990 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1991 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1994 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1998 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2000 WARN_ON(rssi_min_thold
== rssi_max_thold
||
2001 rssi_min_thold
> rssi_max_thold
);
2003 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
2006 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
2008 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
2010 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2012 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
2014 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
2016 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2021 *pos
++ = WLAN_EID_HT_CAPABILITY
;
2022 *pos
++ = sizeof(struct ieee80211_ht_cap
);
2023 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
2025 /* capability flags */
2026 tmp
= cpu_to_le16(cap
);
2027 memcpy(pos
, &tmp
, sizeof(u16
));
2030 /* AMPDU parameters */
2031 *pos
++ = ht_cap
->ampdu_factor
|
2032 (ht_cap
->ampdu_density
<<
2033 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
2036 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
2037 pos
+= sizeof(ht_cap
->mcs
);
2039 /* extended capabilities */
2040 pos
+= sizeof(__le16
);
2042 /* BF capabilities */
2043 pos
+= sizeof(__le32
);
2045 /* antenna selection */
2051 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
2056 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
2057 *pos
++ = sizeof(struct ieee80211_vht_cap
);
2058 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
2060 /* capability flags */
2061 tmp
= cpu_to_le32(cap
);
2062 memcpy(pos
, &tmp
, sizeof(u32
));
2066 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
2067 pos
+= sizeof(vht_cap
->vht_mcs
);
2072 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
2073 const struct cfg80211_chan_def
*chandef
,
2076 struct ieee80211_ht_operation
*ht_oper
;
2077 /* Build HT Information */
2078 *pos
++ = WLAN_EID_HT_OPERATION
;
2079 *pos
++ = sizeof(struct ieee80211_ht_operation
);
2080 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
2081 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
2082 chandef
->chan
->center_freq
);
2083 switch (chandef
->width
) {
2084 case NL80211_CHAN_WIDTH_160
:
2085 case NL80211_CHAN_WIDTH_80P80
:
2086 case NL80211_CHAN_WIDTH_80
:
2087 case NL80211_CHAN_WIDTH_40
:
2088 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
2089 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2091 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2094 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
2097 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
2098 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
2099 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
2100 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
2102 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
2103 ht_oper
->stbc_param
= 0x0000;
2105 /* It seems that Basic MCS set and Supported MCS set
2106 are identical for the first 10 bytes */
2107 memset(&ht_oper
->basic_set
, 0, 16);
2108 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
2110 return pos
+ sizeof(struct ieee80211_ht_operation
);
2113 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2114 const struct ieee80211_ht_operation
*ht_oper
,
2115 struct cfg80211_chan_def
*chandef
)
2117 enum nl80211_channel_type channel_type
;
2120 cfg80211_chandef_create(chandef
, control_chan
,
2121 NL80211_CHAN_NO_HT
);
2125 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2126 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2127 channel_type
= NL80211_CHAN_HT20
;
2129 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2130 channel_type
= NL80211_CHAN_HT40PLUS
;
2132 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2133 channel_type
= NL80211_CHAN_HT40MINUS
;
2136 channel_type
= NL80211_CHAN_NO_HT
;
2139 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2142 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2143 const struct ieee80211_supported_band
*sband
,
2144 const u8
*srates
, int srates_len
, u32
*rates
)
2146 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2147 int shift
= ieee80211_chandef_get_shift(chandef
);
2148 struct ieee80211_rate
*br
;
2149 int brate
, rate
, i
, j
, count
= 0;
2153 for (i
= 0; i
< srates_len
; i
++) {
2154 rate
= srates
[i
] & 0x7f;
2156 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2157 br
= &sband
->bitrates
[j
];
2158 if ((rate_flags
& br
->flags
) != rate_flags
)
2161 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2162 if (brate
== rate
) {
2172 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2173 struct sk_buff
*skb
, bool need_basic
,
2174 enum ieee80211_band band
)
2176 struct ieee80211_local
*local
= sdata
->local
;
2177 struct ieee80211_supported_band
*sband
;
2180 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2183 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2184 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2185 sband
= local
->hw
.wiphy
->bands
[band
];
2187 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2188 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2195 if (skb_tailroom(skb
) < rates
+ 2)
2198 pos
= skb_put(skb
, rates
+ 2);
2199 *pos
++ = WLAN_EID_SUPP_RATES
;
2201 for (i
= 0; i
< rates
; i
++) {
2203 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2206 if (need_basic
&& basic_rates
& BIT(i
))
2208 rate
= sband
->bitrates
[i
].bitrate
;
2209 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2211 *pos
++ = basic
| (u8
) rate
;
2217 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2218 struct sk_buff
*skb
, bool need_basic
,
2219 enum ieee80211_band band
)
2221 struct ieee80211_local
*local
= sdata
->local
;
2222 struct ieee80211_supported_band
*sband
;
2224 u8 i
, exrates
, *pos
;
2225 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2228 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2229 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2231 sband
= local
->hw
.wiphy
->bands
[band
];
2233 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2234 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2244 if (skb_tailroom(skb
) < exrates
+ 2)
2248 pos
= skb_put(skb
, exrates
+ 2);
2249 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2251 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2253 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2256 if (need_basic
&& basic_rates
& BIT(i
))
2258 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2260 *pos
++ = basic
| (u8
) rate
;
2266 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2268 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2269 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2271 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2272 /* non-managed type inferfaces */
2275 return ifmgd
->ave_beacon_signal
/ 16;
2277 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2279 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2284 /* TODO: consider rx_highest */
2286 if (mcs
->rx_mask
[3])
2288 if (mcs
->rx_mask
[2])
2290 if (mcs
->rx_mask
[1])
2296 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2297 * @local: mac80211 hw info struct
2298 * @status: RX status
2299 * @mpdu_len: total MPDU length (including FCS)
2300 * @mpdu_offset: offset into MPDU to calculate timestamp at
2302 * This function calculates the RX timestamp at the given MPDU offset, taking
2303 * into account what the RX timestamp was. An offset of 0 will just normalize
2304 * the timestamp to TSF at beginning of MPDU reception.
2306 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2307 struct ieee80211_rx_status
*status
,
2308 unsigned int mpdu_len
,
2309 unsigned int mpdu_offset
)
2311 u64 ts
= status
->mactime
;
2312 struct rate_info ri
;
2315 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2318 memset(&ri
, 0, sizeof(ri
));
2320 /* Fill cfg80211 rate info */
2321 if (status
->flag
& RX_FLAG_HT
) {
2322 ri
.mcs
= status
->rate_idx
;
2323 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2324 if (status
->flag
& RX_FLAG_40MHZ
)
2325 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2326 if (status
->flag
& RX_FLAG_SHORT_GI
)
2327 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2328 } else if (status
->flag
& RX_FLAG_VHT
) {
2329 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2330 ri
.mcs
= status
->rate_idx
;
2331 ri
.nss
= status
->vht_nss
;
2332 if (status
->flag
& RX_FLAG_40MHZ
)
2333 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2334 if (status
->vht_flag
& RX_VHT_FLAG_80MHZ
)
2335 ri
.flags
|= RATE_INFO_FLAGS_80_MHZ_WIDTH
;
2336 if (status
->vht_flag
& RX_VHT_FLAG_80P80MHZ
)
2337 ri
.flags
|= RATE_INFO_FLAGS_80P80_MHZ_WIDTH
;
2338 if (status
->vht_flag
& RX_VHT_FLAG_160MHZ
)
2339 ri
.flags
|= RATE_INFO_FLAGS_160_MHZ_WIDTH
;
2340 if (status
->flag
& RX_FLAG_SHORT_GI
)
2341 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2343 struct ieee80211_supported_band
*sband
;
2347 if (status
->flag
& RX_FLAG_10MHZ
)
2349 if (status
->flag
& RX_FLAG_5MHZ
)
2352 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2353 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2354 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2357 rate
= cfg80211_calculate_bitrate(&ri
);
2358 if (WARN_ONCE(!rate
,
2359 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2360 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2363 /* rewind from end of MPDU */
2364 if (status
->flag
& RX_FLAG_MACTIME_END
)
2365 ts
-= mpdu_len
* 8 * 10 / rate
;
2367 ts
+= mpdu_offset
* 8 * 10 / rate
;
2372 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2374 struct ieee80211_sub_if_data
*sdata
;
2375 struct cfg80211_chan_def chandef
;
2377 mutex_lock(&local
->mtx
);
2378 mutex_lock(&local
->iflist_mtx
);
2379 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2380 /* it might be waiting for the local->mtx, but then
2381 * by the time it gets it, sdata->wdev.cac_started
2382 * will no longer be true
2384 cancel_delayed_work(&sdata
->dfs_cac_timer_work
);
2386 if (sdata
->wdev
.cac_started
) {
2387 chandef
= sdata
->vif
.bss_conf
.chandef
;
2388 ieee80211_vif_release_channel(sdata
);
2389 cfg80211_cac_event(sdata
->dev
,
2391 NL80211_RADAR_CAC_ABORTED
,
2395 mutex_unlock(&local
->iflist_mtx
);
2396 mutex_unlock(&local
->mtx
);
2399 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2401 struct ieee80211_local
*local
=
2402 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2403 struct cfg80211_chan_def chandef
= local
->hw
.conf
.chandef
;
2405 ieee80211_dfs_cac_cancel(local
);
2407 if (local
->use_chanctx
)
2408 /* currently not handled */
2411 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2414 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2416 struct ieee80211_local
*local
= hw_to_local(hw
);
2418 trace_api_radar_detected(local
);
2420 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2422 EXPORT_SYMBOL(ieee80211_radar_detected
);
2424 u32
ieee80211_chandef_downgrade(struct cfg80211_chan_def
*c
)
2430 case NL80211_CHAN_WIDTH_20
:
2431 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2432 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2434 case NL80211_CHAN_WIDTH_40
:
2435 c
->width
= NL80211_CHAN_WIDTH_20
;
2436 c
->center_freq1
= c
->chan
->center_freq
;
2437 ret
= IEEE80211_STA_DISABLE_40MHZ
|
2438 IEEE80211_STA_DISABLE_VHT
;
2440 case NL80211_CHAN_WIDTH_80
:
2441 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2445 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
2446 c
->width
= NL80211_CHAN_WIDTH_40
;
2447 ret
= IEEE80211_STA_DISABLE_VHT
;
2449 case NL80211_CHAN_WIDTH_80P80
:
2450 c
->center_freq2
= 0;
2451 c
->width
= NL80211_CHAN_WIDTH_80
;
2452 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2453 IEEE80211_STA_DISABLE_160MHZ
;
2455 case NL80211_CHAN_WIDTH_160
:
2457 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2460 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
2461 c
->width
= NL80211_CHAN_WIDTH_80
;
2462 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2463 IEEE80211_STA_DISABLE_160MHZ
;
2466 case NL80211_CHAN_WIDTH_20_NOHT
:
2468 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2469 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2471 case NL80211_CHAN_WIDTH_5
:
2472 case NL80211_CHAN_WIDTH_10
:
2475 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2479 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
2485 * Returns true if smps_mode_new is strictly more restrictive than
2488 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old
,
2489 enum ieee80211_smps_mode smps_mode_new
)
2491 if (WARN_ON_ONCE(smps_mode_old
== IEEE80211_SMPS_AUTOMATIC
||
2492 smps_mode_new
== IEEE80211_SMPS_AUTOMATIC
))
2495 switch (smps_mode_old
) {
2496 case IEEE80211_SMPS_STATIC
:
2498 case IEEE80211_SMPS_DYNAMIC
:
2499 return smps_mode_new
== IEEE80211_SMPS_STATIC
;
2500 case IEEE80211_SMPS_OFF
:
2501 return smps_mode_new
!= IEEE80211_SMPS_OFF
;
2509 int ieee80211_send_action_csa(struct ieee80211_sub_if_data
*sdata
,
2510 struct cfg80211_csa_settings
*csa_settings
)
2512 struct sk_buff
*skb
;
2513 struct ieee80211_mgmt
*mgmt
;
2514 struct ieee80211_local
*local
= sdata
->local
;
2516 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.chan_switch
) +
2517 sizeof(mgmt
->u
.action
.u
.chan_switch
);
2520 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2521 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2524 skb
= dev_alloc_skb(local
->tx_headroom
+ hdr_len
+
2525 5 + /* channel switch announcement element */
2526 3 + /* secondary channel offset element */
2527 8); /* mesh channel switch parameters element */
2531 skb_reserve(skb
, local
->tx_headroom
);
2532 mgmt
= (struct ieee80211_mgmt
*)skb_put(skb
, hdr_len
);
2533 memset(mgmt
, 0, hdr_len
);
2534 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2535 IEEE80211_STYPE_ACTION
);
2537 eth_broadcast_addr(mgmt
->da
);
2538 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2539 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2540 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2542 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2543 memcpy(mgmt
->bssid
, ifibss
->bssid
, ETH_ALEN
);
2545 mgmt
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
2546 mgmt
->u
.action
.u
.chan_switch
.action_code
= WLAN_ACTION_SPCT_CHL_SWITCH
;
2547 pos
= skb_put(skb
, 5);
2548 *pos
++ = WLAN_EID_CHANNEL_SWITCH
; /* EID */
2549 *pos
++ = 3; /* IE length */
2550 *pos
++ = csa_settings
->block_tx
? 1 : 0; /* CSA mode */
2551 freq
= csa_settings
->chandef
.chan
->center_freq
;
2552 *pos
++ = ieee80211_frequency_to_channel(freq
); /* channel */
2553 *pos
++ = csa_settings
->count
; /* count */
2555 if (csa_settings
->chandef
.width
== NL80211_CHAN_WIDTH_40
) {
2556 enum nl80211_channel_type ch_type
;
2559 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
2560 *pos
++ = 1; /* IE length */
2561 ch_type
= cfg80211_get_chandef_type(&csa_settings
->chandef
);
2562 if (ch_type
== NL80211_CHAN_HT40PLUS
)
2563 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2565 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2568 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2569 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2572 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
; /* EID */
2573 *pos
++ = 6; /* IE length */
2574 *pos
++ = sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
; /* Mesh TTL */
2575 *pos
= 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2576 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
2577 *pos
++ |= csa_settings
->block_tx
?
2578 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
2579 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
); /* Reason Cd */
2581 put_unaligned_le16(ifmsh
->pre_value
, pos
);/* Precedence Value */
2585 ieee80211_tx_skb(sdata
, skb
);
2589 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme
*cs
)
2591 return !(cs
== NULL
|| cs
->cipher
== 0 ||
2592 cs
->hdr_len
< cs
->pn_len
+ cs
->pn_off
||
2593 cs
->hdr_len
<= cs
->key_idx_off
||
2594 cs
->key_idx_shift
> 7 ||
2595 cs
->key_idx_mask
== 0);
2598 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme
*cs
, int n
)
2602 /* Ensure we have enough iftype bitmap space for all iftype values */
2603 WARN_ON((NUM_NL80211_IFTYPES
/ 8 + 1) > sizeof(cs
[0].iftype
));
2605 for (i
= 0; i
< n
; i
++)
2606 if (!ieee80211_cs_valid(&cs
[i
]))
2612 const struct ieee80211_cipher_scheme
*
2613 ieee80211_cs_get(struct ieee80211_local
*local
, u32 cipher
,
2614 enum nl80211_iftype iftype
)
2616 const struct ieee80211_cipher_scheme
*l
= local
->hw
.cipher_schemes
;
2617 int n
= local
->hw
.n_cipher_schemes
;
2619 const struct ieee80211_cipher_scheme
*cs
= NULL
;
2621 for (i
= 0; i
< n
; i
++) {
2622 if (l
[i
].cipher
== cipher
) {
2628 if (!cs
|| !(cs
->iftype
& BIT(iftype
)))
2634 int ieee80211_cs_headroom(struct ieee80211_local
*local
,
2635 struct cfg80211_crypto_settings
*crypto
,
2636 enum nl80211_iftype iftype
)
2638 const struct ieee80211_cipher_scheme
*cs
;
2639 int headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2642 for (i
= 0; i
< crypto
->n_ciphers_pairwise
; i
++) {
2643 cs
= ieee80211_cs_get(local
, crypto
->ciphers_pairwise
[i
],
2646 if (cs
&& headroom
< cs
->hdr_len
)
2647 headroom
= cs
->hdr_len
;
2650 cs
= ieee80211_cs_get(local
, crypto
->cipher_group
, iftype
);
2651 if (cs
&& headroom
< cs
->hdr_len
)
2652 headroom
= cs
->hdr_len
;
2658 ieee80211_extend_noa_desc(struct ieee80211_noa_data
*data
, u32 tsf
, int i
)
2660 s32 end
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- (tsf
+ 1);
2666 /* End time is in the past, check for repetitions */
2667 skip
= DIV_ROUND_UP(-end
, data
->desc
[i
].interval
);
2668 if (data
->count
[i
] < 255) {
2669 if (data
->count
[i
] <= skip
) {
2674 data
->count
[i
] -= skip
;
2677 data
->desc
[i
].start
+= skip
* data
->desc
[i
].interval
;
2683 ieee80211_extend_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
,
2689 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2692 if (!data
->count
[i
])
2695 if (ieee80211_extend_noa_desc(data
, tsf
+ *offset
, i
))
2698 cur
= data
->desc
[i
].start
- tsf
;
2702 cur
= data
->desc
[i
].start
+ data
->desc
[i
].duration
- tsf
;
2711 ieee80211_get_noa_absent_time(struct ieee80211_noa_data
*data
, u32 tsf
)
2716 * arbitrary limit, used to avoid infinite loops when combined NoA
2717 * descriptors cover the full time period.
2721 ieee80211_extend_absent_time(data
, tsf
, &offset
);
2723 if (!ieee80211_extend_absent_time(data
, tsf
, &offset
))
2727 } while (tries
< max_tries
);
2732 void ieee80211_update_p2p_noa(struct ieee80211_noa_data
*data
, u32 tsf
)
2734 u32 next_offset
= BIT(31) - 1;
2738 data
->has_next_tsf
= false;
2739 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2742 if (!data
->count
[i
])
2745 ieee80211_extend_noa_desc(data
, tsf
, i
);
2746 start
= data
->desc
[i
].start
- tsf
;
2748 data
->absent
|= BIT(i
);
2750 if (next_offset
> start
)
2751 next_offset
= start
;
2753 data
->has_next_tsf
= true;
2757 next_offset
= ieee80211_get_noa_absent_time(data
, tsf
);
2759 data
->next_tsf
= tsf
+ next_offset
;
2761 EXPORT_SYMBOL(ieee80211_update_p2p_noa
);
2763 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr
*attr
,
2764 struct ieee80211_noa_data
*data
, u32 tsf
)
2769 memset(data
, 0, sizeof(*data
));
2771 for (i
= 0; i
< IEEE80211_P2P_NOA_DESC_MAX
; i
++) {
2772 const struct ieee80211_p2p_noa_desc
*desc
= &attr
->desc
[i
];
2774 if (!desc
->count
|| !desc
->duration
)
2777 data
->count
[i
] = desc
->count
;
2778 data
->desc
[i
].start
= le32_to_cpu(desc
->start_time
);
2779 data
->desc
[i
].duration
= le32_to_cpu(desc
->duration
);
2780 data
->desc
[i
].interval
= le32_to_cpu(desc
->interval
);
2782 if (data
->count
[i
] > 1 &&
2783 data
->desc
[i
].interval
< data
->desc
[i
].duration
)
2786 ieee80211_extend_noa_desc(data
, tsf
, i
);
2791 ieee80211_update_p2p_noa(data
, tsf
);
2795 EXPORT_SYMBOL(ieee80211_parse_p2p_noa
);
2797 void ieee80211_recalc_dtim(struct ieee80211_local
*local
,
2798 struct ieee80211_sub_if_data
*sdata
)
2800 u64 tsf
= drv_get_tsf(local
, sdata
);
2802 u16 beacon_int
= sdata
->vif
.bss_conf
.beacon_int
* 1024;
2803 u8 dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
2807 if (tsf
== -1ULL || !beacon_int
|| !dtim_period
)
2810 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
2811 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
2815 ps
= &sdata
->bss
->ps
;
2816 } else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2817 ps
= &sdata
->u
.mesh
.ps
;
2823 * actually finds last dtim_count, mac80211 will update in
2824 * __beacon_add_tim().
2825 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2827 do_div(tsf
, beacon_int
);
2828 bcns_from_dtim
= do_div(tsf
, dtim_period
);
2829 /* just had a DTIM */
2830 if (!bcns_from_dtim
)
2833 dtim_count
= dtim_period
- bcns_from_dtim
;
2835 ps
->dtim_count
= dtim_count
;
2838 int ieee80211_check_combinations(struct ieee80211_sub_if_data
*sdata
,
2839 const struct cfg80211_chan_def
*chandef
,
2840 enum ieee80211_chanctx_mode chanmode
,
2843 struct ieee80211_local
*local
= sdata
->local
;
2844 struct ieee80211_sub_if_data
*sdata_iter
;
2845 enum nl80211_iftype iftype
= sdata
->wdev
.iftype
;
2846 int num
[NUM_NL80211_IFTYPES
];
2847 struct ieee80211_chanctx
*ctx
;
2848 int num_different_channels
= 0;
2851 lockdep_assert_held(&local
->chanctx_mtx
);
2853 if (WARN_ON(hweight32(radar_detect
) > 1))
2856 if (WARN_ON(chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
2861 num_different_channels
= 1;
2863 if (WARN_ON(iftype
>= NUM_NL80211_IFTYPES
))
2866 /* Always allow software iftypes */
2867 if (local
->hw
.wiphy
->software_iftypes
& BIT(iftype
)) {
2873 memset(num
, 0, sizeof(num
));
2875 if (iftype
!= NL80211_IFTYPE_UNSPECIFIED
)
2878 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
2879 if (ctx
->conf
.radar_enabled
)
2880 radar_detect
|= BIT(ctx
->conf
.def
.width
);
2881 if (ctx
->mode
== IEEE80211_CHANCTX_EXCLUSIVE
) {
2882 num_different_channels
++;
2885 if (chandef
&& chanmode
== IEEE80211_CHANCTX_SHARED
&&
2886 cfg80211_chandef_compatible(chandef
,
2889 num_different_channels
++;
2892 list_for_each_entry_rcu(sdata_iter
, &local
->interfaces
, list
) {
2893 struct wireless_dev
*wdev_iter
;
2895 wdev_iter
= &sdata_iter
->wdev
;
2897 if (sdata_iter
== sdata
||
2898 rcu_access_pointer(sdata_iter
->vif
.chanctx_conf
) == NULL
||
2899 local
->hw
.wiphy
->software_iftypes
& BIT(wdev_iter
->iftype
))
2902 num
[wdev_iter
->iftype
]++;
2906 if (total
== 1 && !radar_detect
)
2909 return cfg80211_check_combinations(local
->hw
.wiphy
,
2910 num_different_channels
,
2915 ieee80211_iter_max_chans(const struct ieee80211_iface_combination
*c
,
2918 u32
*max_num_different_channels
= data
;
2920 *max_num_different_channels
= max(*max_num_different_channels
,
2921 c
->num_different_channels
);
2924 int ieee80211_max_num_channels(struct ieee80211_local
*local
)
2926 struct ieee80211_sub_if_data
*sdata
;
2927 int num
[NUM_NL80211_IFTYPES
] = {};
2928 struct ieee80211_chanctx
*ctx
;
2929 int num_different_channels
= 0;
2930 u8 radar_detect
= 0;
2931 u32 max_num_different_channels
= 1;
2934 lockdep_assert_held(&local
->chanctx_mtx
);
2936 list_for_each_entry(ctx
, &local
->chanctx_list
, list
) {
2937 num_different_channels
++;
2939 if (ctx
->conf
.radar_enabled
)
2940 radar_detect
|= BIT(ctx
->conf
.def
.width
);
2943 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2944 num
[sdata
->wdev
.iftype
]++;
2946 err
= cfg80211_iter_combinations(local
->hw
.wiphy
,
2947 num_different_channels
, radar_detect
,
2948 num
, ieee80211_iter_max_chans
,
2949 &max_num_different_channels
);
2953 return max_num_different_channels
;