2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 void *mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
39 struct ieee80211_hw
*wiphy_to_ieee80211_hw(struct wiphy
*wiphy
)
41 struct ieee80211_local
*local
;
44 local
= wiphy_priv(wiphy
);
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw
);
49 u8
*ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
,
50 enum nl80211_iftype type
)
52 __le16 fc
= hdr
->frame_control
;
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
58 if (ieee80211_is_data(fc
)) {
59 if (len
< 24) /* drop incorrect hdr len (data) */
62 if (ieee80211_has_a4(fc
))
64 if (ieee80211_has_tods(fc
))
66 if (ieee80211_has_fromds(fc
))
72 if (ieee80211_is_mgmt(fc
)) {
73 if (len
< 24) /* drop incorrect hdr len (mgmt) */
78 if (ieee80211_is_ctl(fc
)) {
79 if(ieee80211_is_pspoll(fc
))
82 if (ieee80211_is_back_req(fc
)) {
84 case NL80211_IFTYPE_STATION
:
86 case NL80211_IFTYPE_AP
:
87 case NL80211_IFTYPE_AP_VLAN
:
90 break; /* fall through to the return */
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
101 struct ieee80211_hdr
*hdr
;
103 skb_queue_walk(&tx
->skbs
, skb
) {
104 hdr
= (struct ieee80211_hdr
*) skb
->data
;
105 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
109 int ieee80211_frame_duration(enum ieee80211_band band
, size_t len
,
110 int rate
, int erp
, int short_preamble
,
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
127 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
141 dur
= 16; /* SIFS + signal ext */
142 dur
+= 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur
+= 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
154 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
155 4 * rate
); /* T_SYM x N_SYM */
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
167 dur
= 10; /* aSIFSTime = 10 usec */
168 dur
+= short_preamble
? (72 + 24) : (144 + 48);
170 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
176 /* Exported duration function for driver use */
177 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
178 struct ieee80211_vif
*vif
,
179 enum ieee80211_band band
,
181 struct ieee80211_rate
*rate
)
183 struct ieee80211_sub_if_data
*sdata
;
186 bool short_preamble
= false;
190 sdata
= vif_to_sdata(vif
);
191 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
192 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
193 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
194 shift
= ieee80211_vif_get_shift(vif
);
197 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
198 short_preamble
, shift
);
200 return cpu_to_le16(dur
);
202 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
204 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
205 struct ieee80211_vif
*vif
, size_t frame_len
,
206 const struct ieee80211_tx_info
*frame_txctl
)
208 struct ieee80211_local
*local
= hw_to_local(hw
);
209 struct ieee80211_rate
*rate
;
210 struct ieee80211_sub_if_data
*sdata
;
212 int erp
, shift
= 0, bitrate
;
214 struct ieee80211_supported_band
*sband
;
216 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
218 short_preamble
= false;
220 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
224 sdata
= vif_to_sdata(vif
);
225 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
226 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
227 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
228 shift
= ieee80211_vif_get_shift(vif
);
231 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
234 dur
= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
235 erp
, short_preamble
, shift
);
236 /* Data frame duration */
237 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
238 erp
, short_preamble
, shift
);
240 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
241 erp
, short_preamble
, shift
);
243 return cpu_to_le16(dur
);
245 EXPORT_SYMBOL(ieee80211_rts_duration
);
247 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
248 struct ieee80211_vif
*vif
,
250 const struct ieee80211_tx_info
*frame_txctl
)
252 struct ieee80211_local
*local
= hw_to_local(hw
);
253 struct ieee80211_rate
*rate
;
254 struct ieee80211_sub_if_data
*sdata
;
256 int erp
, shift
= 0, bitrate
;
258 struct ieee80211_supported_band
*sband
;
260 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
262 short_preamble
= false;
264 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
267 sdata
= vif_to_sdata(vif
);
268 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
269 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
270 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
271 shift
= ieee80211_vif_get_shift(vif
);
274 bitrate
= DIV_ROUND_UP(rate
->bitrate
, 1 << shift
);
276 /* Data frame duration */
277 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, bitrate
,
278 erp
, short_preamble
, shift
);
279 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
281 dur
+= ieee80211_frame_duration(sband
->band
, 10, bitrate
,
282 erp
, short_preamble
, shift
);
285 return cpu_to_le16(dur
);
287 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
289 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
291 struct ieee80211_sub_if_data
*sdata
;
292 int n_acs
= IEEE80211_NUM_ACS
;
294 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
297 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
303 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
304 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
307 for (ac
= 0; ac
< n_acs
; ac
++) {
308 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
310 if (ac_queue
== queue
||
311 (sdata
->vif
.cab_queue
== queue
&&
312 local
->queue_stop_reasons
[ac_queue
] == 0 &&
313 skb_queue_empty(&local
->pending
[ac_queue
])))
314 netif_wake_subqueue(sdata
->dev
, ac
);
319 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
320 enum queue_stop_reason reason
)
322 struct ieee80211_local
*local
= hw_to_local(hw
);
324 trace_wake_queue(local
, queue
, reason
);
326 if (WARN_ON(queue
>= hw
->queues
))
329 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
332 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
334 if (local
->queue_stop_reasons
[queue
] != 0)
335 /* someone still has this queue stopped */
338 if (skb_queue_empty(&local
->pending
[queue
])) {
340 ieee80211_propagate_queue_wake(local
, queue
);
343 tasklet_schedule(&local
->tx_pending_tasklet
);
346 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
347 enum queue_stop_reason reason
)
349 struct ieee80211_local
*local
= hw_to_local(hw
);
352 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
353 __ieee80211_wake_queue(hw
, queue
, reason
);
354 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
357 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
359 ieee80211_wake_queue_by_reason(hw
, queue
,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
362 EXPORT_SYMBOL(ieee80211_wake_queue
);
364 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
365 enum queue_stop_reason reason
)
367 struct ieee80211_local
*local
= hw_to_local(hw
);
368 struct ieee80211_sub_if_data
*sdata
;
369 int n_acs
= IEEE80211_NUM_ACS
;
371 trace_stop_queue(local
, queue
, reason
);
373 if (WARN_ON(queue
>= hw
->queues
))
376 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
379 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
381 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
385 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
391 for (ac
= 0; ac
< n_acs
; ac
++) {
392 if (sdata
->vif
.hw_queue
[ac
] == queue
||
393 sdata
->vif
.cab_queue
== queue
)
394 netif_stop_subqueue(sdata
->dev
, ac
);
400 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
401 enum queue_stop_reason reason
)
403 struct ieee80211_local
*local
= hw_to_local(hw
);
406 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
407 __ieee80211_stop_queue(hw
, queue
, reason
);
408 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
411 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
413 ieee80211_stop_queue_by_reason(hw
, queue
,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
416 EXPORT_SYMBOL(ieee80211_stop_queue
);
418 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
421 struct ieee80211_hw
*hw
= &local
->hw
;
423 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
424 int queue
= info
->hw_queue
;
426 if (WARN_ON(!info
->control
.vif
)) {
427 ieee80211_free_txskb(&local
->hw
, skb
);
431 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
432 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
433 __skb_queue_tail(&local
->pending
[queue
], skb
);
434 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
435 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
438 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
439 struct sk_buff_head
*skbs
,
440 void (*fn
)(void *data
), void *data
)
442 struct ieee80211_hw
*hw
= &local
->hw
;
447 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
448 while ((skb
= skb_dequeue(skbs
))) {
449 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
451 if (WARN_ON(!info
->control
.vif
)) {
452 ieee80211_free_txskb(&local
->hw
, skb
);
456 queue
= info
->hw_queue
;
458 __ieee80211_stop_queue(hw
, queue
,
459 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
461 __skb_queue_tail(&local
->pending
[queue
], skb
);
467 for (i
= 0; i
< hw
->queues
; i
++)
468 __ieee80211_wake_queue(hw
, i
,
469 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
470 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
473 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
474 unsigned long queues
,
475 enum queue_stop_reason reason
)
477 struct ieee80211_local
*local
= hw_to_local(hw
);
481 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
483 for_each_set_bit(i
, &queues
, hw
->queues
)
484 __ieee80211_stop_queue(hw
, i
, reason
);
486 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
489 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
491 ieee80211_stop_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
492 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
494 EXPORT_SYMBOL(ieee80211_stop_queues
);
496 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
498 struct ieee80211_local
*local
= hw_to_local(hw
);
502 if (WARN_ON(queue
>= hw
->queues
))
505 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
506 ret
= test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER
,
507 &local
->queue_stop_reasons
[queue
]);
508 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
511 EXPORT_SYMBOL(ieee80211_queue_stopped
);
513 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
514 unsigned long queues
,
515 enum queue_stop_reason reason
)
517 struct ieee80211_local
*local
= hw_to_local(hw
);
521 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
523 for_each_set_bit(i
, &queues
, hw
->queues
)
524 __ieee80211_wake_queue(hw
, i
, reason
);
526 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
529 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
531 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
532 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
534 EXPORT_SYMBOL(ieee80211_wake_queues
);
536 void ieee80211_flush_queues(struct ieee80211_local
*local
,
537 struct ieee80211_sub_if_data
*sdata
)
541 if (!local
->ops
->flush
)
544 if (sdata
&& local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
) {
549 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
550 queues
|= BIT(sdata
->vif
.hw_queue
[ac
]);
551 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
)
552 queues
|= BIT(sdata
->vif
.cab_queue
);
555 queues
= BIT(local
->hw
.queues
) - 1;
558 ieee80211_stop_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
559 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
561 drv_flush(local
, queues
, false);
563 ieee80211_wake_queues_by_reason(&local
->hw
, IEEE80211_MAX_QUEUE_MAP
,
564 IEEE80211_QUEUE_STOP_REASON_FLUSH
);
567 static void __iterate_active_interfaces(struct ieee80211_local
*local
,
569 void (*iterator
)(void *data
, u8
*mac
,
570 struct ieee80211_vif
*vif
),
573 struct ieee80211_sub_if_data
*sdata
;
575 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
576 switch (sdata
->vif
.type
) {
577 case NL80211_IFTYPE_MONITOR
:
578 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
581 case NL80211_IFTYPE_AP_VLAN
:
586 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
587 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
589 if (ieee80211_sdata_running(sdata
))
590 iterator(data
, sdata
->vif
.addr
,
594 sdata
= rcu_dereference_check(local
->monitor_sdata
,
595 lockdep_is_held(&local
->iflist_mtx
) ||
596 lockdep_rtnl_is_held());
598 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
599 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
600 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
603 void ieee80211_iterate_active_interfaces(
604 struct ieee80211_hw
*hw
, u32 iter_flags
,
605 void (*iterator
)(void *data
, u8
*mac
,
606 struct ieee80211_vif
*vif
),
609 struct ieee80211_local
*local
= hw_to_local(hw
);
611 mutex_lock(&local
->iflist_mtx
);
612 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
613 mutex_unlock(&local
->iflist_mtx
);
615 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
617 void ieee80211_iterate_active_interfaces_atomic(
618 struct ieee80211_hw
*hw
, u32 iter_flags
,
619 void (*iterator
)(void *data
, u8
*mac
,
620 struct ieee80211_vif
*vif
),
623 struct ieee80211_local
*local
= hw_to_local(hw
);
626 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
629 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
631 void ieee80211_iterate_active_interfaces_rtnl(
632 struct ieee80211_hw
*hw
, u32 iter_flags
,
633 void (*iterator
)(void *data
, u8
*mac
,
634 struct ieee80211_vif
*vif
),
637 struct ieee80211_local
*local
= hw_to_local(hw
);
641 __iterate_active_interfaces(local
, iter_flags
, iterator
, data
);
643 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl
);
646 * Nothing should have been stuffed into the workqueue during
647 * the suspend->resume cycle. If this WARN is seen then there
648 * is a bug with either the driver suspend or something in
649 * mac80211 stuffing into the workqueue which we haven't yet
650 * cleared during mac80211's suspend cycle.
652 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
654 if (WARN(local
->suspended
&& !local
->resuming
,
655 "queueing ieee80211 work while going to suspend\n"))
661 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
663 struct ieee80211_local
*local
= hw_to_local(hw
);
665 if (!ieee80211_can_queue_work(local
))
668 queue_work(local
->workqueue
, work
);
670 EXPORT_SYMBOL(ieee80211_queue_work
);
672 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
673 struct delayed_work
*dwork
,
676 struct ieee80211_local
*local
= hw_to_local(hw
);
678 if (!ieee80211_can_queue_work(local
))
681 queue_delayed_work(local
->workqueue
, dwork
, delay
);
683 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
685 u32
ieee802_11_parse_elems_crc(const u8
*start
, size_t len
, bool action
,
686 struct ieee802_11_elems
*elems
,
690 const u8
*pos
= start
;
691 bool calc_crc
= filter
!= 0;
692 DECLARE_BITMAP(seen_elems
, 256);
695 bitmap_zero(seen_elems
, 256);
696 memset(elems
, 0, sizeof(*elems
));
697 elems
->ie_start
= start
;
698 elems
->total_len
= len
;
702 bool elem_parse_failed
;
709 elems
->parse_error
= true;
715 case WLAN_EID_SUPP_RATES
:
716 case WLAN_EID_FH_PARAMS
:
717 case WLAN_EID_DS_PARAMS
:
718 case WLAN_EID_CF_PARAMS
:
720 case WLAN_EID_IBSS_PARAMS
:
721 case WLAN_EID_CHALLENGE
:
723 case WLAN_EID_ERP_INFO
:
724 case WLAN_EID_EXT_SUPP_RATES
:
725 case WLAN_EID_HT_CAPABILITY
:
726 case WLAN_EID_HT_OPERATION
:
727 case WLAN_EID_VHT_CAPABILITY
:
728 case WLAN_EID_VHT_OPERATION
:
729 case WLAN_EID_MESH_ID
:
730 case WLAN_EID_MESH_CONFIG
:
731 case WLAN_EID_PEER_MGMT
:
736 case WLAN_EID_CHANNEL_SWITCH
:
737 case WLAN_EID_EXT_CHANSWITCH_ANN
:
738 case WLAN_EID_COUNTRY
:
739 case WLAN_EID_PWR_CONSTRAINT
:
740 case WLAN_EID_TIMEOUT_INTERVAL
:
741 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
742 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
743 case WLAN_EID_CHAN_SWITCH_PARAM
:
745 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
746 * that if the content gets bigger it might be needed more than once
748 if (test_bit(id
, seen_elems
)) {
749 elems
->parse_error
= true;
757 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
758 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
760 elem_parse_failed
= false;
765 elems
->ssid_len
= elen
;
767 case WLAN_EID_SUPP_RATES
:
768 elems
->supp_rates
= pos
;
769 elems
->supp_rates_len
= elen
;
771 case WLAN_EID_DS_PARAMS
:
773 elems
->ds_params
= pos
;
775 elem_parse_failed
= true;
778 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
779 elems
->tim
= (void *)pos
;
780 elems
->tim_len
= elen
;
782 elem_parse_failed
= true;
784 case WLAN_EID_CHALLENGE
:
785 elems
->challenge
= pos
;
786 elems
->challenge_len
= elen
;
788 case WLAN_EID_VENDOR_SPECIFIC
:
789 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
791 /* Microsoft OUI (00:50:F2) */
794 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
796 if (elen
>= 5 && pos
[3] == 2) {
797 /* OUI Type 2 - WMM IE */
799 elems
->wmm_info
= pos
;
800 elems
->wmm_info_len
= elen
;
801 } else if (pos
[4] == 1) {
802 elems
->wmm_param
= pos
;
803 elems
->wmm_param_len
= elen
;
810 elems
->rsn_len
= elen
;
812 case WLAN_EID_ERP_INFO
:
814 elems
->erp_info
= pos
;
816 elem_parse_failed
= true;
818 case WLAN_EID_EXT_SUPP_RATES
:
819 elems
->ext_supp_rates
= pos
;
820 elems
->ext_supp_rates_len
= elen
;
822 case WLAN_EID_HT_CAPABILITY
:
823 if (elen
>= sizeof(struct ieee80211_ht_cap
))
824 elems
->ht_cap_elem
= (void *)pos
;
826 elem_parse_failed
= true;
828 case WLAN_EID_HT_OPERATION
:
829 if (elen
>= sizeof(struct ieee80211_ht_operation
))
830 elems
->ht_operation
= (void *)pos
;
832 elem_parse_failed
= true;
834 case WLAN_EID_VHT_CAPABILITY
:
835 if (elen
>= sizeof(struct ieee80211_vht_cap
))
836 elems
->vht_cap_elem
= (void *)pos
;
838 elem_parse_failed
= true;
840 case WLAN_EID_VHT_OPERATION
:
841 if (elen
>= sizeof(struct ieee80211_vht_operation
))
842 elems
->vht_operation
= (void *)pos
;
844 elem_parse_failed
= true;
846 case WLAN_EID_OPMODE_NOTIF
:
848 elems
->opmode_notif
= pos
;
850 elem_parse_failed
= true;
852 case WLAN_EID_MESH_ID
:
853 elems
->mesh_id
= pos
;
854 elems
->mesh_id_len
= elen
;
856 case WLAN_EID_MESH_CONFIG
:
857 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
858 elems
->mesh_config
= (void *)pos
;
860 elem_parse_failed
= true;
862 case WLAN_EID_PEER_MGMT
:
863 elems
->peering
= pos
;
864 elems
->peering_len
= elen
;
866 case WLAN_EID_MESH_AWAKE_WINDOW
:
868 elems
->awake_window
= (void *)pos
;
872 elems
->preq_len
= elen
;
876 elems
->prep_len
= elen
;
880 elems
->perr_len
= elen
;
883 if (elen
>= sizeof(struct ieee80211_rann_ie
))
884 elems
->rann
= (void *)pos
;
886 elem_parse_failed
= true;
888 case WLAN_EID_CHANNEL_SWITCH
:
889 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
890 elem_parse_failed
= true;
893 elems
->ch_switch_ie
= (void *)pos
;
895 case WLAN_EID_EXT_CHANSWITCH_ANN
:
896 if (elen
!= sizeof(struct ieee80211_ext_chansw_ie
)) {
897 elem_parse_failed
= true;
900 elems
->ext_chansw_ie
= (void *)pos
;
902 case WLAN_EID_SECONDARY_CHANNEL_OFFSET
:
903 if (elen
!= sizeof(struct ieee80211_sec_chan_offs_ie
)) {
904 elem_parse_failed
= true;
907 elems
->sec_chan_offs
= (void *)pos
;
909 case WLAN_EID_CHAN_SWITCH_PARAM
:
911 sizeof(*elems
->mesh_chansw_params_ie
)) {
912 elem_parse_failed
= true;
915 elems
->mesh_chansw_params_ie
= (void *)pos
;
917 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH
:
919 elen
!= sizeof(*elems
->wide_bw_chansw_ie
)) {
920 elem_parse_failed
= true;
923 elems
->wide_bw_chansw_ie
= (void *)pos
;
925 case WLAN_EID_CHANNEL_SWITCH_WRAPPER
:
927 elem_parse_failed
= true;
931 * This is a bit tricky, but as we only care about
932 * the wide bandwidth channel switch element, so
933 * just parse it out manually.
935 ie
= cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH
,
938 if (ie
[1] == sizeof(*elems
->wide_bw_chansw_ie
))
939 elems
->wide_bw_chansw_ie
=
942 elem_parse_failed
= true;
945 case WLAN_EID_COUNTRY
:
946 elems
->country_elem
= pos
;
947 elems
->country_elem_len
= elen
;
949 case WLAN_EID_PWR_CONSTRAINT
:
951 elem_parse_failed
= true;
954 elems
->pwr_constr_elem
= pos
;
956 case WLAN_EID_TIMEOUT_INTERVAL
:
957 if (elen
>= sizeof(struct ieee80211_timeout_interval_ie
))
958 elems
->timeout_int
= (void *)pos
;
960 elem_parse_failed
= true;
966 if (elem_parse_failed
)
967 elems
->parse_error
= true;
969 __set_bit(id
, seen_elems
);
976 elems
->parse_error
= true;
981 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
984 struct ieee80211_local
*local
= sdata
->local
;
985 struct ieee80211_tx_queue_params qparam
;
986 struct ieee80211_chanctx_conf
*chanctx_conf
;
988 bool use_11b
, enable_qos
;
991 if (!local
->ops
->conf_tx
)
994 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
997 memset(&qparam
, 0, sizeof(qparam
));
1000 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1001 use_11b
= (chanctx_conf
&&
1002 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
1003 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
1007 * By default disable QoS in STA mode for old access points, which do
1008 * not support 802.11e. New APs will provide proper queue parameters,
1009 * that we will configure later.
1011 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
1013 /* Set defaults according to 802.11-2007 Table 7-37 */
1020 /* Confiure old 802.11b/g medium access rules. */
1021 qparam
.cw_max
= aCWmax
;
1022 qparam
.cw_min
= aCWmin
;
1026 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1027 /* Update if QoS is enabled. */
1030 case IEEE80211_AC_BK
:
1031 qparam
.cw_max
= aCWmax
;
1032 qparam
.cw_min
= aCWmin
;
1036 /* never happens but let's not leave undefined */
1038 case IEEE80211_AC_BE
:
1039 qparam
.cw_max
= aCWmax
;
1040 qparam
.cw_min
= aCWmin
;
1044 case IEEE80211_AC_VI
:
1045 qparam
.cw_max
= aCWmin
;
1046 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
1048 qparam
.txop
= 6016/32;
1050 qparam
.txop
= 3008/32;
1053 case IEEE80211_AC_VO
:
1054 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
1055 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
1057 qparam
.txop
= 3264/32;
1059 qparam
.txop
= 1504/32;
1065 qparam
.uapsd
= false;
1067 sdata
->tx_conf
[ac
] = qparam
;
1068 drv_conf_tx(local
, sdata
, ac
, &qparam
);
1071 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1072 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
1073 sdata
->vif
.bss_conf
.qos
= enable_qos
;
1075 ieee80211_bss_info_change_notify(sdata
,
1080 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1081 u16 transaction
, u16 auth_alg
, u16 status
,
1082 const u8
*extra
, size_t extra_len
, const u8
*da
,
1083 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
,
1086 struct ieee80211_local
*local
= sdata
->local
;
1087 struct sk_buff
*skb
;
1088 struct ieee80211_mgmt
*mgmt
;
1091 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1092 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24 + 6 + extra_len
);
1096 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1098 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1099 memset(mgmt
, 0, 24 + 6);
1100 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1101 IEEE80211_STYPE_AUTH
);
1102 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1103 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1104 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1105 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1106 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1107 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1109 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1111 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1112 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1113 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1117 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
|
1119 ieee80211_tx_skb(sdata
, skb
);
1122 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1123 const u8
*bssid
, u16 stype
, u16 reason
,
1124 bool send_frame
, u8
*frame_buf
)
1126 struct ieee80211_local
*local
= sdata
->local
;
1127 struct sk_buff
*skb
;
1128 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1131 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1132 mgmt
->duration
= 0; /* initialize only */
1133 mgmt
->seq_ctrl
= 0; /* initialize only */
1134 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1135 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1136 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1137 /* u.deauth.reason_code == u.disassoc.reason_code */
1138 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1141 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1142 IEEE80211_DEAUTH_FRAME_LEN
);
1146 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1149 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1150 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1152 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1153 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1154 IEEE80211_SKB_CB(skb
)->flags
|=
1155 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1157 ieee80211_tx_skb(sdata
, skb
);
1161 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1162 size_t buffer_len
, const u8
*ie
, size_t ie_len
,
1163 enum ieee80211_band band
, u32 rate_mask
,
1164 struct cfg80211_chan_def
*chandef
)
1166 struct ieee80211_supported_band
*sband
;
1167 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1168 size_t offset
= 0, noffset
;
1169 int supp_rates_len
, i
;
1176 sband
= local
->hw
.wiphy
->bands
[band
];
1177 if (WARN_ON_ONCE(!sband
))
1180 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
1181 shift
= ieee80211_chandef_get_shift(chandef
);
1184 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1185 if ((BIT(i
) & rate_mask
) == 0)
1186 continue; /* skip rate */
1187 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
1190 rates
[num_rates
++] =
1191 (u8
) DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
1195 supp_rates_len
= min_t(int, num_rates
, 8);
1197 if (end
- pos
< 2 + supp_rates_len
)
1199 *pos
++ = WLAN_EID_SUPP_RATES
;
1200 *pos
++ = supp_rates_len
;
1201 memcpy(pos
, rates
, supp_rates_len
);
1202 pos
+= supp_rates_len
;
1204 /* insert "request information" if in custom IEs */
1206 static const u8 before_extrates
[] = {
1208 WLAN_EID_SUPP_RATES
,
1211 noffset
= ieee80211_ie_split(ie
, ie_len
,
1213 ARRAY_SIZE(before_extrates
),
1215 if (end
- pos
< noffset
- offset
)
1217 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1218 pos
+= noffset
- offset
;
1222 ext_rates_len
= num_rates
- supp_rates_len
;
1223 if (ext_rates_len
> 0) {
1224 if (end
- pos
< 2 + ext_rates_len
)
1226 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1227 *pos
++ = ext_rates_len
;
1228 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1229 pos
+= ext_rates_len
;
1232 if (chandef
->chan
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1235 *pos
++ = WLAN_EID_DS_PARAMS
;
1237 *pos
++ = ieee80211_frequency_to_channel(
1238 chandef
->chan
->center_freq
);
1241 /* insert custom IEs that go before HT */
1243 static const u8 before_ht
[] = {
1245 WLAN_EID_SUPP_RATES
,
1247 WLAN_EID_EXT_SUPP_RATES
,
1249 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1251 noffset
= ieee80211_ie_split(ie
, ie_len
,
1252 before_ht
, ARRAY_SIZE(before_ht
),
1254 if (end
- pos
< noffset
- offset
)
1256 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1257 pos
+= noffset
- offset
;
1261 if (sband
->ht_cap
.ht_supported
) {
1262 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1264 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1269 * If adding more here, adjust code in main.c
1270 * that calculates local->scan_ies_len.
1273 /* add any remaining custom IEs */
1276 if (end
- pos
< noffset
- offset
)
1278 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1279 pos
+= noffset
- offset
;
1282 if (sband
->vht_cap
.vht_supported
) {
1283 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1285 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1286 sband
->vht_cap
.cap
);
1289 return pos
- buffer
;
1291 WARN_ONCE(1, "not enough space for preq IEs\n");
1292 return pos
- buffer
;
1295 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1296 u8
*dst
, u32 ratemask
,
1297 struct ieee80211_channel
*chan
,
1298 const u8
*ssid
, size_t ssid_len
,
1299 const u8
*ie
, size_t ie_len
,
1302 struct ieee80211_local
*local
= sdata
->local
;
1303 struct cfg80211_chan_def chandef
;
1304 struct sk_buff
*skb
;
1305 struct ieee80211_mgmt
*mgmt
;
1309 * Do not send DS Channel parameter for directed probe requests
1310 * in order to maximize the chance that we get a response. Some
1311 * badly-behaved APs don't respond when this parameter is included.
1313 chandef
.width
= sdata
->vif
.bss_conf
.chandef
.width
;
1315 chandef
.chan
= NULL
;
1317 chandef
.chan
= chan
;
1319 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1320 ssid
, ssid_len
, 100 + ie_len
);
1324 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1326 ie
, ie_len
, chan
->band
,
1327 ratemask
, &chandef
);
1328 skb_put(skb
, ies_len
);
1331 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1332 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1333 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1336 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1341 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1342 const u8
*ssid
, size_t ssid_len
,
1343 const u8
*ie
, size_t ie_len
,
1344 u32 ratemask
, bool directed
, u32 tx_flags
,
1345 struct ieee80211_channel
*channel
, bool scan
)
1347 struct sk_buff
*skb
;
1349 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, channel
,
1351 ie
, ie_len
, directed
);
1353 IEEE80211_SKB_CB(skb
)->flags
|= tx_flags
;
1355 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1357 ieee80211_tx_skb(sdata
, skb
);
1361 u32
ieee80211_sta_get_rates(struct ieee80211_sub_if_data
*sdata
,
1362 struct ieee802_11_elems
*elems
,
1363 enum ieee80211_band band
, u32
*basic_rates
)
1365 struct ieee80211_supported_band
*sband
;
1366 struct ieee80211_rate
*bitrates
;
1368 u32 supp_rates
, rate_flags
;
1370 sband
= sdata
->local
->hw
.wiphy
->bands
[band
];
1372 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
1373 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
1375 if (WARN_ON(!sband
))
1378 bitrates
= sband
->bitrates
;
1379 num_rates
= sband
->n_bitrates
;
1381 for (i
= 0; i
< elems
->supp_rates_len
+
1382 elems
->ext_supp_rates_len
; i
++) {
1386 if (i
< elems
->supp_rates_len
)
1387 rate
= elems
->supp_rates
[i
];
1388 else if (elems
->ext_supp_rates
)
1389 rate
= elems
->ext_supp_rates
1390 [i
- elems
->supp_rates_len
];
1391 own_rate
= 5 * (rate
& 0x7f);
1392 is_basic
= !!(rate
& 0x80);
1394 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1397 for (j
= 0; j
< num_rates
; j
++) {
1399 if ((rate_flags
& sband
->bitrates
[j
].flags
)
1403 brate
= DIV_ROUND_UP(sband
->bitrates
[j
].bitrate
,
1406 if (brate
== own_rate
) {
1407 supp_rates
|= BIT(j
);
1408 if (basic_rates
&& is_basic
)
1409 *basic_rates
|= BIT(j
);
1416 void ieee80211_stop_device(struct ieee80211_local
*local
)
1418 ieee80211_led_radio(local
, false);
1419 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1421 cancel_work_sync(&local
->reconfig_filter
);
1423 flush_workqueue(local
->workqueue
);
1427 static void ieee80211_assign_chanctx(struct ieee80211_local
*local
,
1428 struct ieee80211_sub_if_data
*sdata
)
1430 struct ieee80211_chanctx_conf
*conf
;
1431 struct ieee80211_chanctx
*ctx
;
1433 if (!local
->use_chanctx
)
1436 mutex_lock(&local
->chanctx_mtx
);
1437 conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1438 lockdep_is_held(&local
->chanctx_mtx
));
1440 ctx
= container_of(conf
, struct ieee80211_chanctx
, conf
);
1441 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1443 mutex_unlock(&local
->chanctx_mtx
);
1446 int ieee80211_reconfig(struct ieee80211_local
*local
)
1448 struct ieee80211_hw
*hw
= &local
->hw
;
1449 struct ieee80211_sub_if_data
*sdata
;
1450 struct ieee80211_chanctx
*ctx
;
1451 struct sta_info
*sta
;
1453 bool reconfig_due_to_wowlan
= false;
1456 if (local
->suspended
)
1457 local
->resuming
= true;
1459 if (local
->wowlan
) {
1460 res
= drv_resume(local
);
1461 local
->wowlan
= false;
1463 local
->resuming
= false;
1470 * res is 1, which means the driver requested
1471 * to go through a regular reset on wakeup.
1473 reconfig_due_to_wowlan
= true;
1476 /* everything else happens only if HW was up & running */
1477 if (!local
->open_count
)
1481 * Upon resume hardware can sometimes be goofy due to
1482 * various platform / driver / bus issues, so restarting
1483 * the device may at times not work immediately. Propagate
1486 res
= drv_start(local
);
1488 WARN(local
->suspended
, "Hardware became unavailable "
1489 "upon resume. This could be a software issue "
1490 "prior to suspend or a hardware issue.\n");
1494 /* setup fragmentation threshold */
1495 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1497 /* setup RTS threshold */
1498 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1500 /* reset coverage class */
1501 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1503 ieee80211_led_radio(local
, true);
1504 ieee80211_mod_tpt_led_trig(local
,
1505 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1507 /* add interfaces */
1508 sdata
= rtnl_dereference(local
->monitor_sdata
);
1510 /* in HW restart it exists already */
1511 WARN_ON(local
->resuming
);
1512 res
= drv_add_interface(local
, sdata
);
1514 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
1520 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1521 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1522 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1523 ieee80211_sdata_running(sdata
))
1524 res
= drv_add_interface(local
, sdata
);
1527 /* add channel contexts */
1528 if (local
->use_chanctx
) {
1529 mutex_lock(&local
->chanctx_mtx
);
1530 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1531 WARN_ON(drv_add_chanctx(local
, ctx
));
1532 mutex_unlock(&local
->chanctx_mtx
);
1535 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1536 if (!ieee80211_sdata_running(sdata
))
1538 ieee80211_assign_chanctx(local
, sdata
);
1541 sdata
= rtnl_dereference(local
->monitor_sdata
);
1542 if (sdata
&& ieee80211_sdata_running(sdata
))
1543 ieee80211_assign_chanctx(local
, sdata
);
1546 mutex_lock(&local
->sta_mtx
);
1547 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1548 enum ieee80211_sta_state state
;
1553 /* AP-mode stations will be added later */
1554 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1557 for (state
= IEEE80211_STA_NOTEXIST
;
1558 state
< sta
->sta_state
; state
++)
1559 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1562 mutex_unlock(&local
->sta_mtx
);
1564 /* reconfigure tx conf */
1565 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1566 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1567 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1568 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1569 !ieee80211_sdata_running(sdata
))
1572 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1573 drv_conf_tx(local
, sdata
, i
,
1574 &sdata
->tx_conf
[i
]);
1578 /* reconfigure hardware */
1579 ieee80211_hw_config(local
, ~0);
1581 ieee80211_configure_filter(local
);
1583 /* Finally also reconfigure all the BSS information */
1584 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1587 if (!ieee80211_sdata_running(sdata
))
1590 /* common change flags for all interface types */
1591 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1592 BSS_CHANGED_ERP_PREAMBLE
|
1593 BSS_CHANGED_ERP_SLOT
|
1595 BSS_CHANGED_BASIC_RATES
|
1596 BSS_CHANGED_BEACON_INT
|
1601 BSS_CHANGED_TXPOWER
;
1603 switch (sdata
->vif
.type
) {
1604 case NL80211_IFTYPE_STATION
:
1605 changed
|= BSS_CHANGED_ASSOC
|
1606 BSS_CHANGED_ARP_FILTER
|
1609 /* Re-send beacon info report to the driver */
1610 if (sdata
->u
.mgd
.have_beacon
)
1611 changed
|= BSS_CHANGED_BEACON_INFO
;
1614 ieee80211_bss_info_change_notify(sdata
, changed
);
1615 sdata_unlock(sdata
);
1617 case NL80211_IFTYPE_ADHOC
:
1618 changed
|= BSS_CHANGED_IBSS
;
1620 case NL80211_IFTYPE_AP
:
1621 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1623 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1624 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1626 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1627 drv_start_ap(local
, sdata
);
1631 case NL80211_IFTYPE_MESH_POINT
:
1632 if (sdata
->vif
.bss_conf
.enable_beacon
) {
1633 changed
|= BSS_CHANGED_BEACON
|
1634 BSS_CHANGED_BEACON_ENABLED
;
1635 ieee80211_bss_info_change_notify(sdata
, changed
);
1638 case NL80211_IFTYPE_WDS
:
1640 case NL80211_IFTYPE_AP_VLAN
:
1641 case NL80211_IFTYPE_MONITOR
:
1642 /* ignore virtual */
1644 case NL80211_IFTYPE_P2P_DEVICE
:
1645 changed
= BSS_CHANGED_IDLE
;
1647 case NL80211_IFTYPE_UNSPECIFIED
:
1648 case NUM_NL80211_IFTYPES
:
1649 case NL80211_IFTYPE_P2P_CLIENT
:
1650 case NL80211_IFTYPE_P2P_GO
:
1656 ieee80211_recalc_ps(local
, -1);
1659 * The sta might be in psm against the ap (e.g. because
1660 * this was the state before a hw restart), so we
1661 * explicitly send a null packet in order to make sure
1662 * it'll sync against the ap (and get out of psm).
1664 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1665 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1666 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1668 if (!sdata
->u
.mgd
.associated
)
1671 ieee80211_send_nullfunc(local
, sdata
, 0);
1675 /* APs are now beaconing, add back stations */
1676 mutex_lock(&local
->sta_mtx
);
1677 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1678 enum ieee80211_sta_state state
;
1683 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1686 for (state
= IEEE80211_STA_NOTEXIST
;
1687 state
< sta
->sta_state
; state
++)
1688 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1691 mutex_unlock(&local
->sta_mtx
);
1694 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1695 if (ieee80211_sdata_running(sdata
))
1696 ieee80211_enable_keys(sdata
);
1699 local
->in_reconfig
= false;
1702 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
1703 ieee80211_add_virtual_monitor(local
);
1706 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1707 * sessions can be established after a resume.
1709 * Also tear down aggregation sessions since reconfiguring
1710 * them in a hardware restart scenario is not easily done
1711 * right now, and the hardware will have lost information
1712 * about the sessions, but we and the AP still think they
1713 * are active. This is really a workaround though.
1715 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1716 mutex_lock(&local
->sta_mtx
);
1718 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1719 ieee80211_sta_tear_down_BA_sessions(
1720 sta
, AGG_STOP_LOCAL_REQUEST
);
1721 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1724 mutex_unlock(&local
->sta_mtx
);
1727 ieee80211_wake_queues_by_reason(hw
, IEEE80211_MAX_QUEUE_MAP
,
1728 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1731 * If this is for hw restart things are still running.
1732 * We may want to change that later, however.
1734 if (!local
->suspended
|| reconfig_due_to_wowlan
)
1735 drv_restart_complete(local
);
1737 if (!local
->suspended
)
1741 /* first set suspended false, then resuming */
1742 local
->suspended
= false;
1744 local
->resuming
= false;
1746 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1747 if (!ieee80211_sdata_running(sdata
))
1749 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1750 ieee80211_sta_restart(sdata
);
1753 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1760 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1762 struct ieee80211_sub_if_data
*sdata
;
1763 struct ieee80211_local
*local
;
1764 struct ieee80211_key
*key
;
1769 sdata
= vif_to_sdata(vif
);
1770 local
= sdata
->local
;
1772 if (WARN_ON(!local
->resuming
))
1775 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1778 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1780 mutex_lock(&local
->key_mtx
);
1781 list_for_each_entry(key
, &sdata
->key_list
, list
)
1782 key
->flags
|= KEY_FLAG_TAINTED
;
1783 mutex_unlock(&local
->key_mtx
);
1785 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1787 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
1789 struct ieee80211_local
*local
= sdata
->local
;
1790 struct ieee80211_chanctx_conf
*chanctx_conf
;
1791 struct ieee80211_chanctx
*chanctx
;
1793 mutex_lock(&local
->chanctx_mtx
);
1795 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1796 lockdep_is_held(&local
->chanctx_mtx
));
1798 if (WARN_ON_ONCE(!chanctx_conf
))
1801 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1802 ieee80211_recalc_smps_chanctx(local
, chanctx
);
1804 mutex_unlock(&local
->chanctx_mtx
);
1807 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data
*sdata
)
1809 struct ieee80211_local
*local
= sdata
->local
;
1810 struct ieee80211_chanctx_conf
*chanctx_conf
;
1811 struct ieee80211_chanctx
*chanctx
;
1813 mutex_lock(&local
->chanctx_mtx
);
1815 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1816 lockdep_is_held(&local
->chanctx_mtx
));
1818 if (WARN_ON_ONCE(!chanctx_conf
))
1821 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1822 ieee80211_recalc_chanctx_min_def(local
, chanctx
);
1824 mutex_unlock(&local
->chanctx_mtx
);
1827 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1831 for (i
= 0; i
< n_ids
; i
++)
1838 * ieee80211_ie_split - split an IE buffer according to ordering
1840 * @ies: the IE buffer
1841 * @ielen: the length of the IE buffer
1842 * @ids: an array with element IDs that are allowed before
1844 * @n_ids: the size of the element ID array
1845 * @offset: offset where to start splitting in the buffer
1847 * This function splits an IE buffer by updating the @offset
1848 * variable to point to the location where the buffer should be
1851 * It assumes that the given IE buffer is well-formed, this
1852 * has to be guaranteed by the caller!
1854 * It also assumes that the IEs in the buffer are ordered
1855 * correctly, if not the result of using this function will not
1856 * be ordered correctly either, i.e. it does no reordering.
1858 * The function returns the offset where the next part of the
1859 * buffer starts, which may be @ielen if the entire (remainder)
1860 * of the buffer should be used.
1862 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1863 const u8
*ids
, int n_ids
, size_t offset
)
1865 size_t pos
= offset
;
1867 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1868 pos
+= 2 + ies
[pos
+ 1];
1873 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1875 size_t pos
= offset
;
1877 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1878 pos
+= 2 + ies
[pos
+ 1];
1883 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1887 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1889 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1893 * Scale up threshold values before storing it, as the RSSI averaging
1894 * algorithm uses a scaled up value as well. Change this scaling
1895 * factor if the RSSI averaging algorithm changes.
1897 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1898 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1901 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1905 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1907 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1908 rssi_min_thold
> rssi_max_thold
);
1910 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1913 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1915 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1917 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1919 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1921 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1923 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1928 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1929 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1930 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1932 /* capability flags */
1933 tmp
= cpu_to_le16(cap
);
1934 memcpy(pos
, &tmp
, sizeof(u16
));
1937 /* AMPDU parameters */
1938 *pos
++ = ht_cap
->ampdu_factor
|
1939 (ht_cap
->ampdu_density
<<
1940 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1943 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1944 pos
+= sizeof(ht_cap
->mcs
);
1946 /* extended capabilities */
1947 pos
+= sizeof(__le16
);
1949 /* BF capabilities */
1950 pos
+= sizeof(__le32
);
1952 /* antenna selection */
1958 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
1963 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
1964 *pos
++ = sizeof(struct ieee80211_vht_cap
);
1965 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
1967 /* capability flags */
1968 tmp
= cpu_to_le32(cap
);
1969 memcpy(pos
, &tmp
, sizeof(u32
));
1973 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
1974 pos
+= sizeof(vht_cap
->vht_mcs
);
1979 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1980 const struct cfg80211_chan_def
*chandef
,
1983 struct ieee80211_ht_operation
*ht_oper
;
1984 /* Build HT Information */
1985 *pos
++ = WLAN_EID_HT_OPERATION
;
1986 *pos
++ = sizeof(struct ieee80211_ht_operation
);
1987 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
1988 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
1989 chandef
->chan
->center_freq
);
1990 switch (chandef
->width
) {
1991 case NL80211_CHAN_WIDTH_160
:
1992 case NL80211_CHAN_WIDTH_80P80
:
1993 case NL80211_CHAN_WIDTH_80
:
1994 case NL80211_CHAN_WIDTH_40
:
1995 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
1996 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1998 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2001 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
2004 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
2005 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
2006 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
2007 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
2009 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
2010 ht_oper
->stbc_param
= 0x0000;
2012 /* It seems that Basic MCS set and Supported MCS set
2013 are identical for the first 10 bytes */
2014 memset(&ht_oper
->basic_set
, 0, 16);
2015 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
2017 return pos
+ sizeof(struct ieee80211_ht_operation
);
2020 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
2021 const struct ieee80211_ht_operation
*ht_oper
,
2022 struct cfg80211_chan_def
*chandef
)
2024 enum nl80211_channel_type channel_type
;
2027 cfg80211_chandef_create(chandef
, control_chan
,
2028 NL80211_CHAN_NO_HT
);
2032 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
2033 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
2034 channel_type
= NL80211_CHAN_HT20
;
2036 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
2037 channel_type
= NL80211_CHAN_HT40PLUS
;
2039 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
2040 channel_type
= NL80211_CHAN_HT40MINUS
;
2043 channel_type
= NL80211_CHAN_NO_HT
;
2046 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
2049 int ieee80211_parse_bitrates(struct cfg80211_chan_def
*chandef
,
2050 const struct ieee80211_supported_band
*sband
,
2051 const u8
*srates
, int srates_len
, u32
*rates
)
2053 u32 rate_flags
= ieee80211_chandef_rate_flags(chandef
);
2054 int shift
= ieee80211_chandef_get_shift(chandef
);
2055 struct ieee80211_rate
*br
;
2056 int brate
, rate
, i
, j
, count
= 0;
2060 for (i
= 0; i
< srates_len
; i
++) {
2061 rate
= srates
[i
] & 0x7f;
2063 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
2064 br
= &sband
->bitrates
[j
];
2065 if ((rate_flags
& br
->flags
) != rate_flags
)
2068 brate
= DIV_ROUND_UP(br
->bitrate
, (1 << shift
) * 5);
2069 if (brate
== rate
) {
2079 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2080 struct sk_buff
*skb
, bool need_basic
,
2081 enum ieee80211_band band
)
2083 struct ieee80211_local
*local
= sdata
->local
;
2084 struct ieee80211_supported_band
*sband
;
2087 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2090 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2091 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2092 sband
= local
->hw
.wiphy
->bands
[band
];
2094 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2095 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2102 if (skb_tailroom(skb
) < rates
+ 2)
2105 pos
= skb_put(skb
, rates
+ 2);
2106 *pos
++ = WLAN_EID_SUPP_RATES
;
2108 for (i
= 0; i
< rates
; i
++) {
2110 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2113 if (need_basic
&& basic_rates
& BIT(i
))
2115 rate
= sband
->bitrates
[i
].bitrate
;
2116 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2118 *pos
++ = basic
| (u8
) rate
;
2124 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
2125 struct sk_buff
*skb
, bool need_basic
,
2126 enum ieee80211_band band
)
2128 struct ieee80211_local
*local
= sdata
->local
;
2129 struct ieee80211_supported_band
*sband
;
2131 u8 i
, exrates
, *pos
;
2132 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
2135 rate_flags
= ieee80211_chandef_rate_flags(&sdata
->vif
.bss_conf
.chandef
);
2136 shift
= ieee80211_vif_get_shift(&sdata
->vif
);
2138 sband
= local
->hw
.wiphy
->bands
[band
];
2140 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2141 if ((rate_flags
& sband
->bitrates
[i
].flags
) != rate_flags
)
2151 if (skb_tailroom(skb
) < exrates
+ 2)
2155 pos
= skb_put(skb
, exrates
+ 2);
2156 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2158 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2160 if ((rate_flags
& sband
->bitrates
[i
].flags
)
2163 if (need_basic
&& basic_rates
& BIT(i
))
2165 rate
= DIV_ROUND_UP(sband
->bitrates
[i
].bitrate
,
2167 *pos
++ = basic
| (u8
) rate
;
2173 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2175 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2176 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2178 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2179 /* non-managed type inferfaces */
2182 return ifmgd
->ave_beacon_signal
/ 16;
2184 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2186 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2191 /* TODO: consider rx_highest */
2193 if (mcs
->rx_mask
[3])
2195 if (mcs
->rx_mask
[2])
2197 if (mcs
->rx_mask
[1])
2203 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2204 * @local: mac80211 hw info struct
2205 * @status: RX status
2206 * @mpdu_len: total MPDU length (including FCS)
2207 * @mpdu_offset: offset into MPDU to calculate timestamp at
2209 * This function calculates the RX timestamp at the given MPDU offset, taking
2210 * into account what the RX timestamp was. An offset of 0 will just normalize
2211 * the timestamp to TSF at beginning of MPDU reception.
2213 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2214 struct ieee80211_rx_status
*status
,
2215 unsigned int mpdu_len
,
2216 unsigned int mpdu_offset
)
2218 u64 ts
= status
->mactime
;
2219 struct rate_info ri
;
2222 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2225 memset(&ri
, 0, sizeof(ri
));
2227 /* Fill cfg80211 rate info */
2228 if (status
->flag
& RX_FLAG_HT
) {
2229 ri
.mcs
= status
->rate_idx
;
2230 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2231 if (status
->flag
& RX_FLAG_40MHZ
)
2232 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2233 if (status
->flag
& RX_FLAG_SHORT_GI
)
2234 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2235 } else if (status
->flag
& RX_FLAG_VHT
) {
2236 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2237 ri
.mcs
= status
->rate_idx
;
2238 ri
.nss
= status
->vht_nss
;
2239 if (status
->flag
& RX_FLAG_40MHZ
)
2240 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2241 if (status
->flag
& RX_FLAG_80MHZ
)
2242 ri
.flags
|= RATE_INFO_FLAGS_80_MHZ_WIDTH
;
2243 if (status
->flag
& RX_FLAG_80P80MHZ
)
2244 ri
.flags
|= RATE_INFO_FLAGS_80P80_MHZ_WIDTH
;
2245 if (status
->flag
& RX_FLAG_160MHZ
)
2246 ri
.flags
|= RATE_INFO_FLAGS_160_MHZ_WIDTH
;
2247 if (status
->flag
& RX_FLAG_SHORT_GI
)
2248 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2250 struct ieee80211_supported_band
*sband
;
2254 if (status
->flag
& RX_FLAG_10MHZ
)
2256 if (status
->flag
& RX_FLAG_5MHZ
)
2259 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2260 bitrate
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2261 ri
.legacy
= DIV_ROUND_UP(bitrate
, (1 << shift
));
2264 rate
= cfg80211_calculate_bitrate(&ri
);
2265 if (WARN_ONCE(!rate
,
2266 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2267 status
->flag
, status
->rate_idx
, status
->vht_nss
))
2270 /* rewind from end of MPDU */
2271 if (status
->flag
& RX_FLAG_MACTIME_END
)
2272 ts
-= mpdu_len
* 8 * 10 / rate
;
2274 ts
+= mpdu_offset
* 8 * 10 / rate
;
2279 void ieee80211_dfs_cac_cancel(struct ieee80211_local
*local
)
2281 struct ieee80211_sub_if_data
*sdata
;
2282 struct cfg80211_chan_def chandef
;
2284 mutex_lock(&local
->iflist_mtx
);
2285 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
2286 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
2288 if (sdata
->wdev
.cac_started
) {
2289 chandef
= sdata
->vif
.bss_conf
.chandef
;
2290 ieee80211_vif_release_channel(sdata
);
2291 cfg80211_cac_event(sdata
->dev
,
2293 NL80211_RADAR_CAC_ABORTED
,
2297 mutex_unlock(&local
->iflist_mtx
);
2300 void ieee80211_dfs_radar_detected_work(struct work_struct
*work
)
2302 struct ieee80211_local
*local
=
2303 container_of(work
, struct ieee80211_local
, radar_detected_work
);
2304 struct cfg80211_chan_def chandef
= local
->hw
.conf
.chandef
;
2306 ieee80211_dfs_cac_cancel(local
);
2308 if (local
->use_chanctx
)
2309 /* currently not handled */
2312 cfg80211_radar_event(local
->hw
.wiphy
, &chandef
, GFP_KERNEL
);
2315 void ieee80211_radar_detected(struct ieee80211_hw
*hw
)
2317 struct ieee80211_local
*local
= hw_to_local(hw
);
2319 trace_api_radar_detected(local
);
2321 ieee80211_queue_work(hw
, &local
->radar_detected_work
);
2323 EXPORT_SYMBOL(ieee80211_radar_detected
);
2325 u32
ieee80211_chandef_downgrade(struct cfg80211_chan_def
*c
)
2331 case NL80211_CHAN_WIDTH_20
:
2332 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2333 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2335 case NL80211_CHAN_WIDTH_40
:
2336 c
->width
= NL80211_CHAN_WIDTH_20
;
2337 c
->center_freq1
= c
->chan
->center_freq
;
2338 ret
= IEEE80211_STA_DISABLE_40MHZ
|
2339 IEEE80211_STA_DISABLE_VHT
;
2341 case NL80211_CHAN_WIDTH_80
:
2342 tmp
= (30 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2346 c
->center_freq1
= c
->center_freq1
- 20 + 40 * tmp
;
2347 c
->width
= NL80211_CHAN_WIDTH_40
;
2348 ret
= IEEE80211_STA_DISABLE_VHT
;
2350 case NL80211_CHAN_WIDTH_80P80
:
2351 c
->center_freq2
= 0;
2352 c
->width
= NL80211_CHAN_WIDTH_80
;
2353 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2354 IEEE80211_STA_DISABLE_160MHZ
;
2356 case NL80211_CHAN_WIDTH_160
:
2358 tmp
= (70 + c
->chan
->center_freq
- c
->center_freq1
)/20;
2361 c
->center_freq1
= c
->center_freq1
- 40 + 80 * tmp
;
2362 c
->width
= NL80211_CHAN_WIDTH_80
;
2363 ret
= IEEE80211_STA_DISABLE_80P80MHZ
|
2364 IEEE80211_STA_DISABLE_160MHZ
;
2367 case NL80211_CHAN_WIDTH_20_NOHT
:
2369 c
->width
= NL80211_CHAN_WIDTH_20_NOHT
;
2370 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2372 case NL80211_CHAN_WIDTH_5
:
2373 case NL80211_CHAN_WIDTH_10
:
2376 ret
= IEEE80211_STA_DISABLE_HT
| IEEE80211_STA_DISABLE_VHT
;
2380 WARN_ON_ONCE(!cfg80211_chandef_valid(c
));
2386 * Returns true if smps_mode_new is strictly more restrictive than
2389 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old
,
2390 enum ieee80211_smps_mode smps_mode_new
)
2392 if (WARN_ON_ONCE(smps_mode_old
== IEEE80211_SMPS_AUTOMATIC
||
2393 smps_mode_new
== IEEE80211_SMPS_AUTOMATIC
))
2396 switch (smps_mode_old
) {
2397 case IEEE80211_SMPS_STATIC
:
2399 case IEEE80211_SMPS_DYNAMIC
:
2400 return smps_mode_new
== IEEE80211_SMPS_STATIC
;
2401 case IEEE80211_SMPS_OFF
:
2402 return smps_mode_new
!= IEEE80211_SMPS_OFF
;
2410 int ieee80211_send_action_csa(struct ieee80211_sub_if_data
*sdata
,
2411 struct cfg80211_csa_settings
*csa_settings
)
2413 struct sk_buff
*skb
;
2414 struct ieee80211_mgmt
*mgmt
;
2415 struct ieee80211_local
*local
= sdata
->local
;
2417 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.chan_switch
) +
2418 sizeof(mgmt
->u
.action
.u
.chan_switch
);
2421 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
2422 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
)
2425 skb
= dev_alloc_skb(local
->tx_headroom
+ hdr_len
+
2426 5 + /* channel switch announcement element */
2427 3 + /* secondary channel offset element */
2428 8); /* mesh channel switch parameters element */
2432 skb_reserve(skb
, local
->tx_headroom
);
2433 mgmt
= (struct ieee80211_mgmt
*)skb_put(skb
, hdr_len
);
2434 memset(mgmt
, 0, hdr_len
);
2435 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
2436 IEEE80211_STYPE_ACTION
);
2438 eth_broadcast_addr(mgmt
->da
);
2439 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
2440 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2441 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
2443 struct ieee80211_if_ibss
*ifibss
= &sdata
->u
.ibss
;
2444 memcpy(mgmt
->bssid
, ifibss
->bssid
, ETH_ALEN
);
2446 mgmt
->u
.action
.category
= WLAN_CATEGORY_SPECTRUM_MGMT
;
2447 mgmt
->u
.action
.u
.chan_switch
.action_code
= WLAN_ACTION_SPCT_CHL_SWITCH
;
2448 pos
= skb_put(skb
, 5);
2449 *pos
++ = WLAN_EID_CHANNEL_SWITCH
; /* EID */
2450 *pos
++ = 3; /* IE length */
2451 *pos
++ = csa_settings
->block_tx
? 1 : 0; /* CSA mode */
2452 freq
= csa_settings
->chandef
.chan
->center_freq
;
2453 *pos
++ = ieee80211_frequency_to_channel(freq
); /* channel */
2454 *pos
++ = csa_settings
->count
; /* count */
2456 if (csa_settings
->chandef
.width
== NL80211_CHAN_WIDTH_40
) {
2457 enum nl80211_channel_type ch_type
;
2460 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
2461 *pos
++ = 1; /* IE length */
2462 ch_type
= cfg80211_get_chandef_type(&csa_settings
->chandef
);
2463 if (ch_type
== NL80211_CHAN_HT40PLUS
)
2464 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
2466 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
2469 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2470 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
2473 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
; /* EID */
2474 *pos
++ = 6; /* IE length */
2475 *pos
++ = sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
; /* Mesh TTL */
2476 *pos
= 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2477 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
2478 *pos
++ |= csa_settings
->block_tx
?
2479 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
2480 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
); /* Reason Cd */
2482 put_unaligned_le16(ifmsh
->pre_value
, pos
);/* Precedence Value */
2486 ieee80211_tx_skb(sdata
, skb
);
2490 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme
*cs
)
2492 return !(cs
== NULL
|| cs
->cipher
== 0 ||
2493 cs
->hdr_len
< cs
->pn_len
+ cs
->pn_off
||
2494 cs
->hdr_len
<= cs
->key_idx_off
||
2495 cs
->key_idx_shift
> 7 ||
2496 cs
->key_idx_mask
== 0);
2499 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme
*cs
, int n
)
2503 /* Ensure we have enough iftype bitmap space for all iftype values */
2504 WARN_ON((NUM_NL80211_IFTYPES
/ 8 + 1) > sizeof(cs
[0].iftype
));
2506 for (i
= 0; i
< n
; i
++)
2507 if (!ieee80211_cs_valid(&cs
[i
]))
2513 const struct ieee80211_cipher_scheme
*
2514 ieee80211_cs_get(struct ieee80211_local
*local
, u32 cipher
,
2515 enum nl80211_iftype iftype
)
2517 const struct ieee80211_cipher_scheme
*l
= local
->hw
.cipher_schemes
;
2518 int n
= local
->hw
.n_cipher_schemes
;
2520 const struct ieee80211_cipher_scheme
*cs
= NULL
;
2522 for (i
= 0; i
< n
; i
++) {
2523 if (l
[i
].cipher
== cipher
) {
2529 if (!cs
|| !(cs
->iftype
& BIT(iftype
)))
2535 int ieee80211_cs_headroom(struct ieee80211_local
*local
,
2536 struct cfg80211_crypto_settings
*crypto
,
2537 enum nl80211_iftype iftype
)
2539 const struct ieee80211_cipher_scheme
*cs
;
2540 int headroom
= IEEE80211_ENCRYPT_HEADROOM
;
2543 for (i
= 0; i
< crypto
->n_ciphers_pairwise
; i
++) {
2544 cs
= ieee80211_cs_get(local
, crypto
->ciphers_pairwise
[i
],
2547 if (cs
&& headroom
< cs
->hdr_len
)
2548 headroom
= cs
->hdr_len
;
2551 cs
= ieee80211_cs_get(local
, crypto
->cipher_group
, iftype
);
2552 if (cs
&& headroom
< cs
->hdr_len
)
2553 headroom
= cs
->hdr_len
;