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
)
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
123 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
137 dur
= 16; /* SIFS + signal ext */
138 dur
+= 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur
+= 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
141 4 * rate
); /* T_SYM x N_SYM */
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
153 dur
= 10; /* aSIFSTime = 10 usec */
154 dur
+= short_preamble
? (72 + 24) : (144 + 48);
156 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
162 /* Exported duration function for driver use */
163 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
164 struct ieee80211_vif
*vif
,
165 enum ieee80211_band band
,
167 struct ieee80211_rate
*rate
)
169 struct ieee80211_sub_if_data
*sdata
;
172 bool short_preamble
= false;
176 sdata
= vif_to_sdata(vif
);
177 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
178 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
179 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
182 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
185 return cpu_to_le16(dur
);
187 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
189 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
190 struct ieee80211_vif
*vif
, size_t frame_len
,
191 const struct ieee80211_tx_info
*frame_txctl
)
193 struct ieee80211_local
*local
= hw_to_local(hw
);
194 struct ieee80211_rate
*rate
;
195 struct ieee80211_sub_if_data
*sdata
;
199 struct ieee80211_supported_band
*sband
;
201 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
203 short_preamble
= false;
205 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
209 sdata
= vif_to_sdata(vif
);
210 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
211 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
212 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
216 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
->bitrate
,
217 erp
, short_preamble
);
218 /* Data frame duration */
219 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, rate
->bitrate
,
220 erp
, short_preamble
);
222 dur
+= ieee80211_frame_duration(sband
->band
, 10, rate
->bitrate
,
223 erp
, short_preamble
);
225 return cpu_to_le16(dur
);
227 EXPORT_SYMBOL(ieee80211_rts_duration
);
229 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
230 struct ieee80211_vif
*vif
,
232 const struct ieee80211_tx_info
*frame_txctl
)
234 struct ieee80211_local
*local
= hw_to_local(hw
);
235 struct ieee80211_rate
*rate
;
236 struct ieee80211_sub_if_data
*sdata
;
240 struct ieee80211_supported_band
*sband
;
242 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
244 short_preamble
= false;
246 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
249 sdata
= vif_to_sdata(vif
);
250 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
251 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
252 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
255 /* Data frame duration */
256 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, rate
->bitrate
,
257 erp
, short_preamble
);
258 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
260 dur
+= ieee80211_frame_duration(sband
->band
, 10, rate
->bitrate
,
261 erp
, short_preamble
);
264 return cpu_to_le16(dur
);
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
268 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
270 struct ieee80211_sub_if_data
*sdata
;
271 int n_acs
= IEEE80211_NUM_ACS
;
273 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
276 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
282 if (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
285 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
286 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
289 for (ac
= 0; ac
< n_acs
; ac
++) {
290 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
292 if (ac_queue
== queue
||
293 (sdata
->vif
.cab_queue
== queue
&&
294 local
->queue_stop_reasons
[ac_queue
] == 0 &&
295 skb_queue_empty(&local
->pending
[ac_queue
])))
296 netif_wake_subqueue(sdata
->dev
, ac
);
301 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
302 enum queue_stop_reason reason
)
304 struct ieee80211_local
*local
= hw_to_local(hw
);
306 trace_wake_queue(local
, queue
, reason
);
308 if (WARN_ON(queue
>= hw
->queues
))
311 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
314 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
316 if (local
->queue_stop_reasons
[queue
] != 0)
317 /* someone still has this queue stopped */
320 if (skb_queue_empty(&local
->pending
[queue
])) {
322 ieee80211_propagate_queue_wake(local
, queue
);
325 tasklet_schedule(&local
->tx_pending_tasklet
);
328 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
329 enum queue_stop_reason reason
)
331 struct ieee80211_local
*local
= hw_to_local(hw
);
334 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
335 __ieee80211_wake_queue(hw
, queue
, reason
);
336 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
339 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
341 ieee80211_wake_queue_by_reason(hw
, queue
,
342 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
344 EXPORT_SYMBOL(ieee80211_wake_queue
);
346 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
347 enum queue_stop_reason reason
)
349 struct ieee80211_local
*local
= hw_to_local(hw
);
350 struct ieee80211_sub_if_data
*sdata
;
351 int n_acs
= IEEE80211_NUM_ACS
;
353 trace_stop_queue(local
, queue
, reason
);
355 if (WARN_ON(queue
>= hw
->queues
))
358 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
361 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
363 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
367 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
373 for (ac
= 0; ac
< n_acs
; ac
++) {
374 if (sdata
->vif
.hw_queue
[ac
] == queue
||
375 sdata
->vif
.cab_queue
== queue
)
376 netif_stop_subqueue(sdata
->dev
, ac
);
382 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
383 enum queue_stop_reason reason
)
385 struct ieee80211_local
*local
= hw_to_local(hw
);
388 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
389 __ieee80211_stop_queue(hw
, queue
, reason
);
390 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
393 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
395 ieee80211_stop_queue_by_reason(hw
, queue
,
396 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
398 EXPORT_SYMBOL(ieee80211_stop_queue
);
400 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
403 struct ieee80211_hw
*hw
= &local
->hw
;
405 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
406 int queue
= info
->hw_queue
;
408 if (WARN_ON(!info
->control
.vif
)) {
409 ieee80211_free_txskb(&local
->hw
, skb
);
413 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
414 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
415 __skb_queue_tail(&local
->pending
[queue
], skb
);
416 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
417 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
420 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
421 struct sk_buff_head
*skbs
,
422 void (*fn
)(void *data
), void *data
)
424 struct ieee80211_hw
*hw
= &local
->hw
;
429 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
430 while ((skb
= skb_dequeue(skbs
))) {
431 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
433 if (WARN_ON(!info
->control
.vif
)) {
434 ieee80211_free_txskb(&local
->hw
, skb
);
438 queue
= info
->hw_queue
;
440 __ieee80211_stop_queue(hw
, queue
,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
443 __skb_queue_tail(&local
->pending
[queue
], skb
);
449 for (i
= 0; i
< hw
->queues
; i
++)
450 __ieee80211_wake_queue(hw
, i
,
451 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
452 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
455 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
456 enum queue_stop_reason reason
)
458 struct ieee80211_local
*local
= hw_to_local(hw
);
462 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
464 for (i
= 0; i
< hw
->queues
; i
++)
465 __ieee80211_stop_queue(hw
, i
, reason
);
467 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
470 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
472 ieee80211_stop_queues_by_reason(hw
,
473 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
475 EXPORT_SYMBOL(ieee80211_stop_queues
);
477 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
479 struct ieee80211_local
*local
= hw_to_local(hw
);
483 if (WARN_ON(queue
>= hw
->queues
))
486 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
487 ret
= !!local
->queue_stop_reasons
[queue
];
488 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
491 EXPORT_SYMBOL(ieee80211_queue_stopped
);
493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
494 enum queue_stop_reason reason
)
496 struct ieee80211_local
*local
= hw_to_local(hw
);
500 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
502 for (i
= 0; i
< hw
->queues
; i
++)
503 __ieee80211_wake_queue(hw
, i
, reason
);
505 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
508 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
510 ieee80211_wake_queues_by_reason(hw
, IEEE80211_QUEUE_STOP_REASON_DRIVER
);
512 EXPORT_SYMBOL(ieee80211_wake_queues
);
514 void ieee80211_iterate_active_interfaces(
515 struct ieee80211_hw
*hw
, u32 iter_flags
,
516 void (*iterator
)(void *data
, u8
*mac
,
517 struct ieee80211_vif
*vif
),
520 struct ieee80211_local
*local
= hw_to_local(hw
);
521 struct ieee80211_sub_if_data
*sdata
;
523 mutex_lock(&local
->iflist_mtx
);
525 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
526 switch (sdata
->vif
.type
) {
527 case NL80211_IFTYPE_MONITOR
:
528 case NL80211_IFTYPE_AP_VLAN
:
533 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
534 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
536 if (ieee80211_sdata_running(sdata
))
537 iterator(data
, sdata
->vif
.addr
,
541 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
542 lockdep_is_held(&local
->iflist_mtx
));
544 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
545 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
546 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
548 mutex_unlock(&local
->iflist_mtx
);
550 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
552 void ieee80211_iterate_active_interfaces_atomic(
553 struct ieee80211_hw
*hw
, u32 iter_flags
,
554 void (*iterator
)(void *data
, u8
*mac
,
555 struct ieee80211_vif
*vif
),
558 struct ieee80211_local
*local
= hw_to_local(hw
);
559 struct ieee80211_sub_if_data
*sdata
;
563 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
564 switch (sdata
->vif
.type
) {
565 case NL80211_IFTYPE_MONITOR
:
566 case NL80211_IFTYPE_AP_VLAN
:
571 if (!(iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
) &&
572 !(sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
574 if (ieee80211_sdata_running(sdata
))
575 iterator(data
, sdata
->vif
.addr
,
579 sdata
= rcu_dereference(local
->monitor_sdata
);
581 (iter_flags
& IEEE80211_IFACE_ITER_RESUME_ALL
||
582 sdata
->flags
& IEEE80211_SDATA_IN_DRIVER
))
583 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
587 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
590 * Nothing should have been stuffed into the workqueue during
591 * the suspend->resume cycle. If this WARN is seen then there
592 * is a bug with either the driver suspend or something in
593 * mac80211 stuffing into the workqueue which we haven't yet
594 * cleared during mac80211's suspend cycle.
596 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
598 if (WARN(local
->suspended
&& !local
->resuming
,
599 "queueing ieee80211 work while going to suspend\n"))
605 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
607 struct ieee80211_local
*local
= hw_to_local(hw
);
609 if (!ieee80211_can_queue_work(local
))
612 queue_work(local
->workqueue
, work
);
614 EXPORT_SYMBOL(ieee80211_queue_work
);
616 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
617 struct delayed_work
*dwork
,
620 struct ieee80211_local
*local
= hw_to_local(hw
);
622 if (!ieee80211_can_queue_work(local
))
625 queue_delayed_work(local
->workqueue
, dwork
, delay
);
627 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
629 u32
ieee802_11_parse_elems_crc(u8
*start
, size_t len
,
630 struct ieee802_11_elems
*elems
,
635 bool calc_crc
= filter
!= 0;
636 DECLARE_BITMAP(seen_elems
, 256);
638 bitmap_zero(seen_elems
, 256);
639 memset(elems
, 0, sizeof(*elems
));
640 elems
->ie_start
= start
;
641 elems
->total_len
= len
;
645 bool elem_parse_failed
;
652 elems
->parse_error
= true;
658 case WLAN_EID_SUPP_RATES
:
659 case WLAN_EID_FH_PARAMS
:
660 case WLAN_EID_DS_PARAMS
:
661 case WLAN_EID_CF_PARAMS
:
663 case WLAN_EID_IBSS_PARAMS
:
664 case WLAN_EID_CHALLENGE
:
666 case WLAN_EID_ERP_INFO
:
667 case WLAN_EID_EXT_SUPP_RATES
:
668 case WLAN_EID_HT_CAPABILITY
:
669 case WLAN_EID_HT_OPERATION
:
670 case WLAN_EID_VHT_CAPABILITY
:
671 case WLAN_EID_VHT_OPERATION
:
672 case WLAN_EID_MESH_ID
:
673 case WLAN_EID_MESH_CONFIG
:
674 case WLAN_EID_PEER_MGMT
:
679 case WLAN_EID_CHANNEL_SWITCH
:
680 case WLAN_EID_EXT_CHANSWITCH_ANN
:
681 case WLAN_EID_COUNTRY
:
682 case WLAN_EID_PWR_CONSTRAINT
:
683 case WLAN_EID_TIMEOUT_INTERVAL
:
684 if (test_bit(id
, seen_elems
)) {
685 elems
->parse_error
= true;
693 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
694 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
696 elem_parse_failed
= false;
701 elems
->ssid_len
= elen
;
703 case WLAN_EID_SUPP_RATES
:
704 elems
->supp_rates
= pos
;
705 elems
->supp_rates_len
= elen
;
707 case WLAN_EID_FH_PARAMS
:
708 elems
->fh_params
= pos
;
709 elems
->fh_params_len
= elen
;
711 case WLAN_EID_DS_PARAMS
:
712 elems
->ds_params
= pos
;
713 elems
->ds_params_len
= elen
;
715 case WLAN_EID_CF_PARAMS
:
716 elems
->cf_params
= pos
;
717 elems
->cf_params_len
= elen
;
720 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
721 elems
->tim
= (void *)pos
;
722 elems
->tim_len
= elen
;
724 elem_parse_failed
= true;
726 case WLAN_EID_IBSS_PARAMS
:
727 elems
->ibss_params
= pos
;
728 elems
->ibss_params_len
= elen
;
730 case WLAN_EID_CHALLENGE
:
731 elems
->challenge
= pos
;
732 elems
->challenge_len
= elen
;
734 case WLAN_EID_VENDOR_SPECIFIC
:
735 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
737 /* Microsoft OUI (00:50:F2) */
740 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
743 /* OUI Type 1 - WPA IE */
745 elems
->wpa_len
= elen
;
746 } else if (elen
>= 5 && pos
[3] == 2) {
747 /* OUI Type 2 - WMM IE */
749 elems
->wmm_info
= pos
;
750 elems
->wmm_info_len
= elen
;
751 } else if (pos
[4] == 1) {
752 elems
->wmm_param
= pos
;
753 elems
->wmm_param_len
= elen
;
760 elems
->rsn_len
= elen
;
762 case WLAN_EID_ERP_INFO
:
763 elems
->erp_info
= pos
;
764 elems
->erp_info_len
= elen
;
766 case WLAN_EID_EXT_SUPP_RATES
:
767 elems
->ext_supp_rates
= pos
;
768 elems
->ext_supp_rates_len
= elen
;
770 case WLAN_EID_HT_CAPABILITY
:
771 if (elen
>= sizeof(struct ieee80211_ht_cap
))
772 elems
->ht_cap_elem
= (void *)pos
;
774 elem_parse_failed
= true;
776 case WLAN_EID_HT_OPERATION
:
777 if (elen
>= sizeof(struct ieee80211_ht_operation
))
778 elems
->ht_operation
= (void *)pos
;
780 elem_parse_failed
= true;
782 case WLAN_EID_VHT_CAPABILITY
:
783 if (elen
>= sizeof(struct ieee80211_vht_cap
))
784 elems
->vht_cap_elem
= (void *)pos
;
786 elem_parse_failed
= true;
788 case WLAN_EID_VHT_OPERATION
:
789 if (elen
>= sizeof(struct ieee80211_vht_operation
))
790 elems
->vht_operation
= (void *)pos
;
792 elem_parse_failed
= true;
794 case WLAN_EID_MESH_ID
:
795 elems
->mesh_id
= pos
;
796 elems
->mesh_id_len
= elen
;
798 case WLAN_EID_MESH_CONFIG
:
799 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
800 elems
->mesh_config
= (void *)pos
;
802 elem_parse_failed
= true;
804 case WLAN_EID_PEER_MGMT
:
805 elems
->peering
= pos
;
806 elems
->peering_len
= elen
;
810 elems
->preq_len
= elen
;
814 elems
->prep_len
= elen
;
818 elems
->perr_len
= elen
;
821 if (elen
>= sizeof(struct ieee80211_rann_ie
))
822 elems
->rann
= (void *)pos
;
824 elem_parse_failed
= true;
826 case WLAN_EID_CHANNEL_SWITCH
:
827 if (elen
!= sizeof(struct ieee80211_channel_sw_ie
)) {
828 elem_parse_failed
= true;
831 elems
->ch_switch_ie
= (void *)pos
;
834 if (!elems
->quiet_elem
) {
835 elems
->quiet_elem
= pos
;
836 elems
->quiet_elem_len
= elen
;
838 elems
->num_of_quiet_elem
++;
840 case WLAN_EID_COUNTRY
:
841 elems
->country_elem
= pos
;
842 elems
->country_elem_len
= elen
;
844 case WLAN_EID_PWR_CONSTRAINT
:
846 elem_parse_failed
= true;
849 elems
->pwr_constr_elem
= pos
;
851 case WLAN_EID_TIMEOUT_INTERVAL
:
852 elems
->timeout_int
= pos
;
853 elems
->timeout_int_len
= elen
;
859 if (elem_parse_failed
)
860 elems
->parse_error
= true;
862 __set_bit(id
, seen_elems
);
869 elems
->parse_error
= true;
874 void ieee802_11_parse_elems(u8
*start
, size_t len
,
875 struct ieee802_11_elems
*elems
)
877 ieee802_11_parse_elems_crc(start
, len
, elems
, 0, 0);
880 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
883 struct ieee80211_local
*local
= sdata
->local
;
884 struct ieee80211_tx_queue_params qparam
;
885 struct ieee80211_chanctx_conf
*chanctx_conf
;
887 bool use_11b
, enable_qos
;
890 if (!local
->ops
->conf_tx
)
893 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
896 memset(&qparam
, 0, sizeof(qparam
));
899 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
900 use_11b
= (chanctx_conf
&&
901 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
) &&
902 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
906 * By default disable QoS in STA mode for old access points, which do
907 * not support 802.11e. New APs will provide proper queue parameters,
908 * that we will configure later.
910 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
912 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
913 /* Set defaults according to 802.11-2007 Table 7-37 */
922 case IEEE80211_AC_BK
:
923 qparam
.cw_max
= aCWmax
;
924 qparam
.cw_min
= aCWmin
;
928 /* never happens but let's not leave undefined */
930 case IEEE80211_AC_BE
:
931 qparam
.cw_max
= aCWmax
;
932 qparam
.cw_min
= aCWmin
;
936 case IEEE80211_AC_VI
:
937 qparam
.cw_max
= aCWmin
;
938 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
940 qparam
.txop
= 6016/32;
942 qparam
.txop
= 3008/32;
945 case IEEE80211_AC_VO
:
946 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
947 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
949 qparam
.txop
= 3264/32;
951 qparam
.txop
= 1504/32;
956 /* Confiure old 802.11b/g medium access rules. */
957 qparam
.cw_max
= aCWmax
;
958 qparam
.cw_min
= aCWmin
;
963 qparam
.uapsd
= false;
965 sdata
->tx_conf
[ac
] = qparam
;
966 drv_conf_tx(local
, sdata
, ac
, &qparam
);
969 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
970 sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
971 sdata
->vif
.bss_conf
.qos
= enable_qos
;
973 ieee80211_bss_info_change_notify(sdata
,
978 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
979 const size_t supp_rates_len
,
980 const u8
*supp_rates
)
982 struct ieee80211_chanctx_conf
*chanctx_conf
;
983 int i
, have_higher_than_11mbit
= 0;
985 /* cf. IEEE 802.11 9.2.12 */
986 for (i
= 0; i
< supp_rates_len
; i
++)
987 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
988 have_higher_than_11mbit
= 1;
991 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
994 chanctx_conf
->def
.chan
->band
== IEEE80211_BAND_2GHZ
&&
995 have_higher_than_11mbit
)
996 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
998 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1001 ieee80211_set_wmm_default(sdata
, true);
1004 u32
ieee80211_mandatory_rates(struct ieee80211_local
*local
,
1005 enum ieee80211_band band
)
1007 struct ieee80211_supported_band
*sband
;
1008 struct ieee80211_rate
*bitrates
;
1009 u32 mandatory_rates
;
1010 enum ieee80211_rate_flags mandatory_flag
;
1013 sband
= local
->hw
.wiphy
->bands
[band
];
1014 if (WARN_ON(!sband
))
1017 if (band
== IEEE80211_BAND_2GHZ
)
1018 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
1020 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
1022 bitrates
= sband
->bitrates
;
1023 mandatory_rates
= 0;
1024 for (i
= 0; i
< sband
->n_bitrates
; i
++)
1025 if (bitrates
[i
].flags
& mandatory_flag
)
1026 mandatory_rates
|= BIT(i
);
1027 return mandatory_rates
;
1030 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
1031 u16 transaction
, u16 auth_alg
, u16 status
,
1032 u8
*extra
, size_t extra_len
, const u8
*da
,
1033 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
)
1035 struct ieee80211_local
*local
= sdata
->local
;
1036 struct sk_buff
*skb
;
1037 struct ieee80211_mgmt
*mgmt
;
1040 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1041 sizeof(*mgmt
) + 6 + extra_len
);
1045 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1047 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
1048 memset(mgmt
, 0, 24 + 6);
1049 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1050 IEEE80211_STYPE_AUTH
);
1051 memcpy(mgmt
->da
, da
, ETH_ALEN
);
1052 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1053 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1054 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
1055 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
1056 mgmt
->u
.auth
.status_code
= cpu_to_le16(status
);
1058 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
1060 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
1061 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
1062 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
1066 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1067 ieee80211_tx_skb(sdata
, skb
);
1070 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
1071 const u8
*bssid
, u16 stype
, u16 reason
,
1072 bool send_frame
, u8
*frame_buf
)
1074 struct ieee80211_local
*local
= sdata
->local
;
1075 struct sk_buff
*skb
;
1076 struct ieee80211_mgmt
*mgmt
= (void *)frame_buf
;
1079 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
1080 mgmt
->duration
= 0; /* initialize only */
1081 mgmt
->seq_ctrl
= 0; /* initialize only */
1082 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
1083 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1084 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
1085 /* u.deauth.reason_code == u.disassoc.reason_code */
1086 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
1089 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1090 IEEE80211_DEAUTH_FRAME_LEN
);
1094 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1097 memcpy(skb_put(skb
, IEEE80211_DEAUTH_FRAME_LEN
),
1098 mgmt
, IEEE80211_DEAUTH_FRAME_LEN
);
1100 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
1101 !(sdata
->u
.mgd
.flags
& IEEE80211_STA_MFP_ENABLED
))
1102 IEEE80211_SKB_CB(skb
)->flags
|=
1103 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1105 ieee80211_tx_skb(sdata
, skb
);
1109 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
1110 size_t buffer_len
, const u8
*ie
, size_t ie_len
,
1111 enum ieee80211_band band
, u32 rate_mask
,
1114 struct ieee80211_supported_band
*sband
;
1115 u8
*pos
= buffer
, *end
= buffer
+ buffer_len
;
1116 size_t offset
= 0, noffset
;
1117 int supp_rates_len
, i
;
1122 sband
= local
->hw
.wiphy
->bands
[band
];
1123 if (WARN_ON_ONCE(!sband
))
1127 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1128 if ((BIT(i
) & rate_mask
) == 0)
1129 continue; /* skip rate */
1130 rates
[num_rates
++] = (u8
) (sband
->bitrates
[i
].bitrate
/ 5);
1133 supp_rates_len
= min_t(int, num_rates
, 8);
1135 if (end
- pos
< 2 + supp_rates_len
)
1137 *pos
++ = WLAN_EID_SUPP_RATES
;
1138 *pos
++ = supp_rates_len
;
1139 memcpy(pos
, rates
, supp_rates_len
);
1140 pos
+= supp_rates_len
;
1142 /* insert "request information" if in custom IEs */
1144 static const u8 before_extrates
[] = {
1146 WLAN_EID_SUPP_RATES
,
1149 noffset
= ieee80211_ie_split(ie
, ie_len
,
1151 ARRAY_SIZE(before_extrates
),
1153 if (end
- pos
< noffset
- offset
)
1155 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1156 pos
+= noffset
- offset
;
1160 ext_rates_len
= num_rates
- supp_rates_len
;
1161 if (ext_rates_len
> 0) {
1162 if (end
- pos
< 2 + ext_rates_len
)
1164 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1165 *pos
++ = ext_rates_len
;
1166 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1167 pos
+= ext_rates_len
;
1170 if (channel
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1173 *pos
++ = WLAN_EID_DS_PARAMS
;
1178 /* insert custom IEs that go before HT */
1180 static const u8 before_ht
[] = {
1182 WLAN_EID_SUPP_RATES
,
1184 WLAN_EID_EXT_SUPP_RATES
,
1186 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1188 noffset
= ieee80211_ie_split(ie
, ie_len
,
1189 before_ht
, ARRAY_SIZE(before_ht
),
1191 if (end
- pos
< noffset
- offset
)
1193 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1194 pos
+= noffset
- offset
;
1198 if (sband
->ht_cap
.ht_supported
) {
1199 if (end
- pos
< 2 + sizeof(struct ieee80211_ht_cap
))
1201 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1206 * If adding more here, adjust code in main.c
1207 * that calculates local->scan_ies_len.
1210 /* add any remaining custom IEs */
1213 if (end
- pos
< noffset
- offset
)
1215 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1216 pos
+= noffset
- offset
;
1219 if (sband
->vht_cap
.vht_supported
) {
1220 if (end
- pos
< 2 + sizeof(struct ieee80211_vht_cap
))
1222 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1223 sband
->vht_cap
.cap
);
1226 return pos
- buffer
;
1228 WARN_ONCE(1, "not enough space for preq IEs\n");
1229 return pos
- buffer
;
1232 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1233 u8
*dst
, u32 ratemask
,
1234 struct ieee80211_channel
*chan
,
1235 const u8
*ssid
, size_t ssid_len
,
1236 const u8
*ie
, size_t ie_len
,
1239 struct ieee80211_local
*local
= sdata
->local
;
1240 struct sk_buff
*skb
;
1241 struct ieee80211_mgmt
*mgmt
;
1246 * Do not send DS Channel parameter for directed probe requests
1247 * in order to maximize the chance that we get a response. Some
1248 * badly-behaved APs don't respond when this parameter is included.
1253 chan_no
= ieee80211_frequency_to_channel(chan
->center_freq
);
1255 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1256 ssid
, ssid_len
, 100 + ie_len
);
1260 ies_len
= ieee80211_build_preq_ies(local
, skb_tail_pointer(skb
),
1262 ie
, ie_len
, chan
->band
,
1264 skb_put(skb
, ies_len
);
1267 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1268 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1269 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1272 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1277 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1278 const u8
*ssid
, size_t ssid_len
,
1279 const u8
*ie
, size_t ie_len
,
1280 u32 ratemask
, bool directed
, bool no_cck
,
1281 struct ieee80211_channel
*channel
, bool scan
)
1283 struct sk_buff
*skb
;
1285 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, channel
,
1287 ie
, ie_len
, directed
);
1290 IEEE80211_SKB_CB(skb
)->flags
|=
1291 IEEE80211_TX_CTL_NO_CCK_RATE
;
1293 ieee80211_tx_skb_tid_band(sdata
, skb
, 7, channel
->band
);
1295 ieee80211_tx_skb(sdata
, skb
);
1299 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
1300 struct ieee802_11_elems
*elems
,
1301 enum ieee80211_band band
, u32
*basic_rates
)
1303 struct ieee80211_supported_band
*sband
;
1304 struct ieee80211_rate
*bitrates
;
1308 sband
= local
->hw
.wiphy
->bands
[band
];
1310 if (WARN_ON(!sband
))
1313 bitrates
= sband
->bitrates
;
1314 num_rates
= sband
->n_bitrates
;
1316 for (i
= 0; i
< elems
->supp_rates_len
+
1317 elems
->ext_supp_rates_len
; i
++) {
1321 if (i
< elems
->supp_rates_len
)
1322 rate
= elems
->supp_rates
[i
];
1323 else if (elems
->ext_supp_rates
)
1324 rate
= elems
->ext_supp_rates
1325 [i
- elems
->supp_rates_len
];
1326 own_rate
= 5 * (rate
& 0x7f);
1327 is_basic
= !!(rate
& 0x80);
1329 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1332 for (j
= 0; j
< num_rates
; j
++) {
1333 if (bitrates
[j
].bitrate
== own_rate
) {
1334 supp_rates
|= BIT(j
);
1335 if (basic_rates
&& is_basic
)
1336 *basic_rates
|= BIT(j
);
1343 void ieee80211_stop_device(struct ieee80211_local
*local
)
1345 ieee80211_led_radio(local
, false);
1346 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1348 cancel_work_sync(&local
->reconfig_filter
);
1350 flush_workqueue(local
->workqueue
);
1354 int ieee80211_reconfig(struct ieee80211_local
*local
)
1356 struct ieee80211_hw
*hw
= &local
->hw
;
1357 struct ieee80211_sub_if_data
*sdata
;
1358 struct ieee80211_chanctx
*ctx
;
1359 struct sta_info
*sta
;
1363 if (local
->suspended
)
1364 local
->resuming
= true;
1366 if (local
->wowlan
) {
1367 local
->wowlan
= false;
1368 res
= drv_resume(local
);
1370 local
->resuming
= false;
1377 * res is 1, which means the driver requested
1378 * to go through a regular reset on wakeup.
1382 /* everything else happens only if HW was up & running */
1383 if (!local
->open_count
)
1387 * Upon resume hardware can sometimes be goofy due to
1388 * various platform / driver / bus issues, so restarting
1389 * the device may at times not work immediately. Propagate
1392 res
= drv_start(local
);
1394 WARN(local
->suspended
, "Hardware became unavailable "
1395 "upon resume. This could be a software issue "
1396 "prior to suspend or a hardware issue.\n");
1400 /* setup fragmentation threshold */
1401 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1403 /* setup RTS threshold */
1404 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1406 /* reset coverage class */
1407 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1409 ieee80211_led_radio(local
, true);
1410 ieee80211_mod_tpt_led_trig(local
,
1411 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1413 /* add interfaces */
1414 sdata
= rtnl_dereference(local
->monitor_sdata
);
1416 res
= drv_add_interface(local
, sdata
);
1418 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
1424 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1425 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1426 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1427 ieee80211_sdata_running(sdata
))
1428 res
= drv_add_interface(local
, sdata
);
1431 /* add channel contexts */
1432 if (local
->use_chanctx
) {
1433 mutex_lock(&local
->chanctx_mtx
);
1434 list_for_each_entry(ctx
, &local
->chanctx_list
, list
)
1435 WARN_ON(drv_add_chanctx(local
, ctx
));
1436 mutex_unlock(&local
->chanctx_mtx
);
1439 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1440 struct ieee80211_chanctx_conf
*ctx_conf
;
1442 if (!ieee80211_sdata_running(sdata
))
1445 mutex_lock(&local
->chanctx_mtx
);
1446 ctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1447 lockdep_is_held(&local
->chanctx_mtx
));
1449 ctx
= container_of(ctx_conf
, struct ieee80211_chanctx
,
1451 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1453 mutex_unlock(&local
->chanctx_mtx
);
1456 sdata
= rtnl_dereference(local
->monitor_sdata
);
1457 if (sdata
&& local
->use_chanctx
&& ieee80211_sdata_running(sdata
)) {
1458 struct ieee80211_chanctx_conf
*ctx_conf
;
1460 mutex_lock(&local
->chanctx_mtx
);
1461 ctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1462 lockdep_is_held(&local
->chanctx_mtx
));
1464 ctx
= container_of(ctx_conf
, struct ieee80211_chanctx
,
1466 drv_assign_vif_chanctx(local
, sdata
, ctx
);
1468 mutex_unlock(&local
->chanctx_mtx
);
1472 mutex_lock(&local
->sta_mtx
);
1473 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1474 enum ieee80211_sta_state state
;
1479 /* AP-mode stations will be added later */
1480 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1483 for (state
= IEEE80211_STA_NOTEXIST
;
1484 state
< sta
->sta_state
; state
++)
1485 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1488 mutex_unlock(&local
->sta_mtx
);
1490 /* reconfigure tx conf */
1491 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1492 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1493 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1494 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1495 !ieee80211_sdata_running(sdata
))
1498 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1499 drv_conf_tx(local
, sdata
, i
,
1500 &sdata
->tx_conf
[i
]);
1504 /* reconfigure hardware */
1505 ieee80211_hw_config(local
, ~0);
1507 ieee80211_configure_filter(local
);
1509 /* Finally also reconfigure all the BSS information */
1510 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1513 if (!ieee80211_sdata_running(sdata
))
1516 /* common change flags for all interface types */
1517 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1518 BSS_CHANGED_ERP_PREAMBLE
|
1519 BSS_CHANGED_ERP_SLOT
|
1521 BSS_CHANGED_BASIC_RATES
|
1522 BSS_CHANGED_BEACON_INT
|
1527 BSS_CHANGED_TXPOWER
;
1529 switch (sdata
->vif
.type
) {
1530 case NL80211_IFTYPE_STATION
:
1531 changed
|= BSS_CHANGED_ASSOC
|
1532 BSS_CHANGED_ARP_FILTER
|
1534 mutex_lock(&sdata
->u
.mgd
.mtx
);
1535 ieee80211_bss_info_change_notify(sdata
, changed
);
1536 mutex_unlock(&sdata
->u
.mgd
.mtx
);
1538 case NL80211_IFTYPE_ADHOC
:
1539 changed
|= BSS_CHANGED_IBSS
;
1541 case NL80211_IFTYPE_AP
:
1542 changed
|= BSS_CHANGED_SSID
| BSS_CHANGED_P2P_PS
;
1544 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
1545 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1547 if (rcu_access_pointer(sdata
->u
.ap
.beacon
))
1548 drv_start_ap(local
, sdata
);
1552 case NL80211_IFTYPE_MESH_POINT
:
1553 changed
|= BSS_CHANGED_BEACON
|
1554 BSS_CHANGED_BEACON_ENABLED
;
1555 ieee80211_bss_info_change_notify(sdata
, changed
);
1557 case NL80211_IFTYPE_WDS
:
1559 case NL80211_IFTYPE_AP_VLAN
:
1560 case NL80211_IFTYPE_MONITOR
:
1561 /* ignore virtual */
1563 case NL80211_IFTYPE_P2P_DEVICE
:
1564 changed
= BSS_CHANGED_IDLE
;
1566 case NL80211_IFTYPE_UNSPECIFIED
:
1567 case NUM_NL80211_IFTYPES
:
1568 case NL80211_IFTYPE_P2P_CLIENT
:
1569 case NL80211_IFTYPE_P2P_GO
:
1575 ieee80211_recalc_ps(local
, -1);
1578 * The sta might be in psm against the ap (e.g. because
1579 * this was the state before a hw restart), so we
1580 * explicitly send a null packet in order to make sure
1581 * it'll sync against the ap (and get out of psm).
1583 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1584 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1585 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1587 if (!sdata
->u
.mgd
.associated
)
1590 ieee80211_send_nullfunc(local
, sdata
, 0);
1594 /* APs are now beaconing, add back stations */
1595 mutex_lock(&local
->sta_mtx
);
1596 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1597 enum ieee80211_sta_state state
;
1602 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1605 for (state
= IEEE80211_STA_NOTEXIST
;
1606 state
< sta
->sta_state
; state
++)
1607 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1610 mutex_unlock(&local
->sta_mtx
);
1613 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1614 if (ieee80211_sdata_running(sdata
))
1615 ieee80211_enable_keys(sdata
);
1618 local
->in_reconfig
= false;
1622 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1623 * sessions can be established after a resume.
1625 * Also tear down aggregation sessions since reconfiguring
1626 * them in a hardware restart scenario is not easily done
1627 * right now, and the hardware will have lost information
1628 * about the sessions, but we and the AP still think they
1629 * are active. This is really a workaround though.
1631 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1632 mutex_lock(&local
->sta_mtx
);
1634 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1635 ieee80211_sta_tear_down_BA_sessions(sta
, true);
1636 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1639 mutex_unlock(&local
->sta_mtx
);
1642 ieee80211_wake_queues_by_reason(hw
,
1643 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1646 * If this is for hw restart things are still running.
1647 * We may want to change that later, however.
1649 if (!local
->suspended
) {
1650 drv_restart_complete(local
);
1655 /* first set suspended false, then resuming */
1656 local
->suspended
= false;
1658 local
->resuming
= false;
1660 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1661 switch(sdata
->vif
.type
) {
1662 case NL80211_IFTYPE_STATION
:
1663 ieee80211_sta_restart(sdata
);
1665 case NL80211_IFTYPE_ADHOC
:
1666 ieee80211_ibss_restart(sdata
);
1668 case NL80211_IFTYPE_MESH_POINT
:
1669 ieee80211_mesh_restart(sdata
);
1676 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1678 mutex_lock(&local
->sta_mtx
);
1679 list_for_each_entry(sta
, &local
->sta_list
, list
)
1680 mesh_plink_restart(sta
);
1681 mutex_unlock(&local
->sta_mtx
);
1688 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1690 struct ieee80211_sub_if_data
*sdata
;
1691 struct ieee80211_local
*local
;
1692 struct ieee80211_key
*key
;
1697 sdata
= vif_to_sdata(vif
);
1698 local
= sdata
->local
;
1700 if (WARN_ON(!local
->resuming
))
1703 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1706 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1708 mutex_lock(&local
->key_mtx
);
1709 list_for_each_entry(key
, &sdata
->key_list
, list
)
1710 key
->flags
|= KEY_FLAG_TAINTED
;
1711 mutex_unlock(&local
->key_mtx
);
1713 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1715 void ieee80211_recalc_smps(struct ieee80211_sub_if_data
*sdata
)
1717 struct ieee80211_local
*local
= sdata
->local
;
1718 struct ieee80211_chanctx_conf
*chanctx_conf
;
1719 struct ieee80211_chanctx
*chanctx
;
1721 mutex_lock(&local
->chanctx_mtx
);
1723 chanctx_conf
= rcu_dereference_protected(sdata
->vif
.chanctx_conf
,
1724 lockdep_is_held(&local
->chanctx_mtx
));
1726 if (WARN_ON_ONCE(!chanctx_conf
))
1729 chanctx
= container_of(chanctx_conf
, struct ieee80211_chanctx
, conf
);
1730 ieee80211_recalc_smps_chanctx(local
, chanctx
);
1732 mutex_unlock(&local
->chanctx_mtx
);
1735 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1739 for (i
= 0; i
< n_ids
; i
++)
1746 * ieee80211_ie_split - split an IE buffer according to ordering
1748 * @ies: the IE buffer
1749 * @ielen: the length of the IE buffer
1750 * @ids: an array with element IDs that are allowed before
1752 * @n_ids: the size of the element ID array
1753 * @offset: offset where to start splitting in the buffer
1755 * This function splits an IE buffer by updating the @offset
1756 * variable to point to the location where the buffer should be
1759 * It assumes that the given IE buffer is well-formed, this
1760 * has to be guaranteed by the caller!
1762 * It also assumes that the IEs in the buffer are ordered
1763 * correctly, if not the result of using this function will not
1764 * be ordered correctly either, i.e. it does no reordering.
1766 * The function returns the offset where the next part of the
1767 * buffer starts, which may be @ielen if the entire (remainder)
1768 * of the buffer should be used.
1770 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1771 const u8
*ids
, int n_ids
, size_t offset
)
1773 size_t pos
= offset
;
1775 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1776 pos
+= 2 + ies
[pos
+ 1];
1781 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1783 size_t pos
= offset
;
1785 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1786 pos
+= 2 + ies
[pos
+ 1];
1791 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1795 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1797 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1801 * Scale up threshold values before storing it, as the RSSI averaging
1802 * algorithm uses a scaled up value as well. Change this scaling
1803 * factor if the RSSI averaging algorithm changes.
1805 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1806 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1809 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1813 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1815 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1816 rssi_min_thold
> rssi_max_thold
);
1818 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1821 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1823 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1825 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1827 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1829 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1831 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1836 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1837 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1838 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1840 /* capability flags */
1841 tmp
= cpu_to_le16(cap
);
1842 memcpy(pos
, &tmp
, sizeof(u16
));
1845 /* AMPDU parameters */
1846 *pos
++ = ht_cap
->ampdu_factor
|
1847 (ht_cap
->ampdu_density
<<
1848 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1851 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1852 pos
+= sizeof(ht_cap
->mcs
);
1854 /* extended capabilities */
1855 pos
+= sizeof(__le16
);
1857 /* BF capabilities */
1858 pos
+= sizeof(__le32
);
1860 /* antenna selection */
1866 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
1871 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
1872 *pos
++ = sizeof(struct ieee80211_vht_cap
);
1873 memset(pos
, 0, sizeof(struct ieee80211_vht_cap
));
1875 /* capability flags */
1876 tmp
= cpu_to_le32(cap
);
1877 memcpy(pos
, &tmp
, sizeof(u32
));
1881 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
1882 pos
+= sizeof(vht_cap
->vht_mcs
);
1887 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1888 const struct cfg80211_chan_def
*chandef
,
1891 struct ieee80211_ht_operation
*ht_oper
;
1892 /* Build HT Information */
1893 *pos
++ = WLAN_EID_HT_OPERATION
;
1894 *pos
++ = sizeof(struct ieee80211_ht_operation
);
1895 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
1896 ht_oper
->primary_chan
= ieee80211_frequency_to_channel(
1897 chandef
->chan
->center_freq
);
1898 switch (chandef
->width
) {
1899 case NL80211_CHAN_WIDTH_160
:
1900 case NL80211_CHAN_WIDTH_80P80
:
1901 case NL80211_CHAN_WIDTH_80
:
1902 case NL80211_CHAN_WIDTH_40
:
1903 if (chandef
->center_freq1
> chandef
->chan
->center_freq
)
1904 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1906 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1909 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1912 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
1913 chandef
->width
!= NL80211_CHAN_WIDTH_20_NOHT
&&
1914 chandef
->width
!= NL80211_CHAN_WIDTH_20
)
1915 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1917 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
1918 ht_oper
->stbc_param
= 0x0000;
1920 /* It seems that Basic MCS set and Supported MCS set
1921 are identical for the first 10 bytes */
1922 memset(&ht_oper
->basic_set
, 0, 16);
1923 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
1925 return pos
+ sizeof(struct ieee80211_ht_operation
);
1928 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel
*control_chan
,
1929 struct ieee80211_ht_operation
*ht_oper
,
1930 struct cfg80211_chan_def
*chandef
)
1932 enum nl80211_channel_type channel_type
;
1935 cfg80211_chandef_create(chandef
, control_chan
,
1936 NL80211_CHAN_NO_HT
);
1940 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
1941 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1942 channel_type
= NL80211_CHAN_HT20
;
1944 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1945 channel_type
= NL80211_CHAN_HT40PLUS
;
1947 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1948 channel_type
= NL80211_CHAN_HT40MINUS
;
1951 channel_type
= NL80211_CHAN_NO_HT
;
1954 cfg80211_chandef_create(chandef
, control_chan
, channel_type
);
1957 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
1958 struct sk_buff
*skb
, bool need_basic
,
1959 enum ieee80211_band band
)
1961 struct ieee80211_local
*local
= sdata
->local
;
1962 struct ieee80211_supported_band
*sband
;
1965 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
1967 sband
= local
->hw
.wiphy
->bands
[band
];
1968 rates
= sband
->n_bitrates
;
1972 if (skb_tailroom(skb
) < rates
+ 2)
1975 pos
= skb_put(skb
, rates
+ 2);
1976 *pos
++ = WLAN_EID_SUPP_RATES
;
1978 for (i
= 0; i
< rates
; i
++) {
1980 if (need_basic
&& basic_rates
& BIT(i
))
1982 rate
= sband
->bitrates
[i
].bitrate
;
1983 *pos
++ = basic
| (u8
) (rate
/ 5);
1989 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
1990 struct sk_buff
*skb
, bool need_basic
,
1991 enum ieee80211_band band
)
1993 struct ieee80211_local
*local
= sdata
->local
;
1994 struct ieee80211_supported_band
*sband
;
1996 u8 i
, exrates
, *pos
;
1997 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
1999 sband
= local
->hw
.wiphy
->bands
[band
];
2000 exrates
= sband
->n_bitrates
;
2006 if (skb_tailroom(skb
) < exrates
+ 2)
2010 pos
= skb_put(skb
, exrates
+ 2);
2011 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2013 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
2015 if (need_basic
&& basic_rates
& BIT(i
))
2017 rate
= sband
->bitrates
[i
].bitrate
;
2018 *pos
++ = basic
| (u8
) (rate
/ 5);
2024 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
2026 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2027 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2029 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
2030 /* non-managed type inferfaces */
2033 return ifmgd
->ave_beacon_signal
;
2035 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);
2037 u8
ieee80211_mcs_to_chains(const struct ieee80211_mcs_info
*mcs
)
2042 /* TODO: consider rx_highest */
2044 if (mcs
->rx_mask
[3])
2046 if (mcs
->rx_mask
[2])
2048 if (mcs
->rx_mask
[1])
2054 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2055 * @local: mac80211 hw info struct
2056 * @status: RX status
2057 * @mpdu_len: total MPDU length (including FCS)
2058 * @mpdu_offset: offset into MPDU to calculate timestamp at
2060 * This function calculates the RX timestamp at the given MPDU offset, taking
2061 * into account what the RX timestamp was. An offset of 0 will just normalize
2062 * the timestamp to TSF at beginning of MPDU reception.
2064 u64
ieee80211_calculate_rx_timestamp(struct ieee80211_local
*local
,
2065 struct ieee80211_rx_status
*status
,
2066 unsigned int mpdu_len
,
2067 unsigned int mpdu_offset
)
2069 u64 ts
= status
->mactime
;
2070 struct rate_info ri
;
2073 if (WARN_ON(!ieee80211_have_rx_timestamp(status
)))
2076 memset(&ri
, 0, sizeof(ri
));
2078 /* Fill cfg80211 rate info */
2079 if (status
->flag
& RX_FLAG_HT
) {
2080 ri
.mcs
= status
->rate_idx
;
2081 ri
.flags
|= RATE_INFO_FLAGS_MCS
;
2082 if (status
->flag
& RX_FLAG_40MHZ
)
2083 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2084 if (status
->flag
& RX_FLAG_SHORT_GI
)
2085 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2086 } else if (status
->flag
& RX_FLAG_VHT
) {
2087 ri
.flags
|= RATE_INFO_FLAGS_VHT_MCS
;
2088 ri
.mcs
= status
->rate_idx
;
2089 ri
.nss
= status
->vht_nss
;
2090 if (status
->flag
& RX_FLAG_40MHZ
)
2091 ri
.flags
|= RATE_INFO_FLAGS_40_MHZ_WIDTH
;
2092 if (status
->flag
& RX_FLAG_80MHZ
)
2093 ri
.flags
|= RATE_INFO_FLAGS_80_MHZ_WIDTH
;
2094 if (status
->flag
& RX_FLAG_80P80MHZ
)
2095 ri
.flags
|= RATE_INFO_FLAGS_80P80_MHZ_WIDTH
;
2096 if (status
->flag
& RX_FLAG_160MHZ
)
2097 ri
.flags
|= RATE_INFO_FLAGS_160_MHZ_WIDTH
;
2098 if (status
->flag
& RX_FLAG_SHORT_GI
)
2099 ri
.flags
|= RATE_INFO_FLAGS_SHORT_GI
;
2101 struct ieee80211_supported_band
*sband
;
2103 sband
= local
->hw
.wiphy
->bands
[status
->band
];
2104 ri
.legacy
= sband
->bitrates
[status
->rate_idx
].bitrate
;
2107 rate
= cfg80211_calculate_bitrate(&ri
);
2109 /* rewind from end of MPDU */
2110 if (status
->flag
& RX_FLAG_MACTIME_END
)
2111 ts
-= mpdu_len
* 8 * 10 / rate
;
2113 ts
+= mpdu_offset
* 8 * 10 / rate
;