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
) {
279 if (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
282 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
283 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
286 for (ac
= 0; ac
< n_acs
; ac
++) {
287 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
289 if (ac_queue
== queue
||
290 (sdata
->vif
.cab_queue
== queue
&&
291 local
->queue_stop_reasons
[ac_queue
] == 0 &&
292 skb_queue_empty(&local
->pending
[ac_queue
])))
293 netif_wake_subqueue(sdata
->dev
, ac
);
298 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
299 enum queue_stop_reason reason
)
301 struct ieee80211_local
*local
= hw_to_local(hw
);
303 trace_wake_queue(local
, queue
, reason
);
305 if (WARN_ON(queue
>= hw
->queues
))
308 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
311 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
313 if (local
->queue_stop_reasons
[queue
] != 0)
314 /* someone still has this queue stopped */
317 if (skb_queue_empty(&local
->pending
[queue
])) {
319 ieee80211_propagate_queue_wake(local
, queue
);
322 tasklet_schedule(&local
->tx_pending_tasklet
);
325 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
326 enum queue_stop_reason reason
)
328 struct ieee80211_local
*local
= hw_to_local(hw
);
331 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
332 __ieee80211_wake_queue(hw
, queue
, reason
);
333 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
336 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
338 ieee80211_wake_queue_by_reason(hw
, queue
,
339 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
341 EXPORT_SYMBOL(ieee80211_wake_queue
);
343 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
344 enum queue_stop_reason reason
)
346 struct ieee80211_local
*local
= hw_to_local(hw
);
347 struct ieee80211_sub_if_data
*sdata
;
348 int n_acs
= IEEE80211_NUM_ACS
;
350 trace_stop_queue(local
, queue
, reason
);
352 if (WARN_ON(queue
>= hw
->queues
))
355 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
358 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
360 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
364 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
367 for (ac
= 0; ac
< n_acs
; ac
++) {
368 if (sdata
->vif
.hw_queue
[ac
] == queue
||
369 sdata
->vif
.cab_queue
== queue
)
370 netif_stop_subqueue(sdata
->dev
, ac
);
376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
377 enum queue_stop_reason reason
)
379 struct ieee80211_local
*local
= hw_to_local(hw
);
382 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
383 __ieee80211_stop_queue(hw
, queue
, reason
);
384 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
387 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
389 ieee80211_stop_queue_by_reason(hw
, queue
,
390 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
392 EXPORT_SYMBOL(ieee80211_stop_queue
);
394 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
397 struct ieee80211_hw
*hw
= &local
->hw
;
399 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
400 int queue
= info
->hw_queue
;
402 if (WARN_ON(!info
->control
.vif
)) {
407 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
408 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
409 __skb_queue_tail(&local
->pending
[queue
], skb
);
410 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
411 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
414 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
415 struct sk_buff_head
*skbs
,
416 void (*fn
)(void *data
), void *data
)
418 struct ieee80211_hw
*hw
= &local
->hw
;
423 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
424 while ((skb
= skb_dequeue(skbs
))) {
425 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
427 if (WARN_ON(!info
->control
.vif
)) {
432 queue
= info
->hw_queue
;
434 __ieee80211_stop_queue(hw
, queue
,
435 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
437 __skb_queue_tail(&local
->pending
[queue
], skb
);
443 for (i
= 0; i
< hw
->queues
; i
++)
444 __ieee80211_wake_queue(hw
, i
,
445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
446 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
449 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
450 enum queue_stop_reason reason
)
452 struct ieee80211_local
*local
= hw_to_local(hw
);
456 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
458 for (i
= 0; i
< hw
->queues
; i
++)
459 __ieee80211_stop_queue(hw
, i
, reason
);
461 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
464 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
466 ieee80211_stop_queues_by_reason(hw
,
467 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
469 EXPORT_SYMBOL(ieee80211_stop_queues
);
471 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
473 struct ieee80211_local
*local
= hw_to_local(hw
);
477 if (WARN_ON(queue
>= hw
->queues
))
480 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
481 ret
= !!local
->queue_stop_reasons
[queue
];
482 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
485 EXPORT_SYMBOL(ieee80211_queue_stopped
);
487 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
488 enum queue_stop_reason reason
)
490 struct ieee80211_local
*local
= hw_to_local(hw
);
494 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
496 for (i
= 0; i
< hw
->queues
; i
++)
497 __ieee80211_wake_queue(hw
, i
, reason
);
499 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
502 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
504 ieee80211_wake_queues_by_reason(hw
, IEEE80211_QUEUE_STOP_REASON_DRIVER
);
506 EXPORT_SYMBOL(ieee80211_wake_queues
);
508 void ieee80211_iterate_active_interfaces(
509 struct ieee80211_hw
*hw
,
510 void (*iterator
)(void *data
, u8
*mac
,
511 struct ieee80211_vif
*vif
),
514 struct ieee80211_local
*local
= hw_to_local(hw
);
515 struct ieee80211_sub_if_data
*sdata
;
517 mutex_lock(&local
->iflist_mtx
);
519 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
520 switch (sdata
->vif
.type
) {
521 case NL80211_IFTYPE_MONITOR
:
522 case NL80211_IFTYPE_AP_VLAN
:
527 if (ieee80211_sdata_running(sdata
))
528 iterator(data
, sdata
->vif
.addr
,
532 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
533 lockdep_is_held(&local
->iflist_mtx
));
535 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
537 mutex_unlock(&local
->iflist_mtx
);
539 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
541 void ieee80211_iterate_active_interfaces_atomic(
542 struct ieee80211_hw
*hw
,
543 void (*iterator
)(void *data
, u8
*mac
,
544 struct ieee80211_vif
*vif
),
547 struct ieee80211_local
*local
= hw_to_local(hw
);
548 struct ieee80211_sub_if_data
*sdata
;
552 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
553 switch (sdata
->vif
.type
) {
554 case NL80211_IFTYPE_MONITOR
:
555 case NL80211_IFTYPE_AP_VLAN
:
560 if (ieee80211_sdata_running(sdata
))
561 iterator(data
, sdata
->vif
.addr
,
565 sdata
= rcu_dereference(local
->monitor_sdata
);
567 iterator(data
, sdata
->vif
.addr
, &sdata
->vif
);
571 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
574 * Nothing should have been stuffed into the workqueue during
575 * the suspend->resume cycle. If this WARN is seen then there
576 * is a bug with either the driver suspend or something in
577 * mac80211 stuffing into the workqueue which we haven't yet
578 * cleared during mac80211's suspend cycle.
580 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
582 if (WARN(local
->suspended
&& !local
->resuming
,
583 "queueing ieee80211 work while going to suspend\n"))
589 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
591 struct ieee80211_local
*local
= hw_to_local(hw
);
593 if (!ieee80211_can_queue_work(local
))
596 queue_work(local
->workqueue
, work
);
598 EXPORT_SYMBOL(ieee80211_queue_work
);
600 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
601 struct delayed_work
*dwork
,
604 struct ieee80211_local
*local
= hw_to_local(hw
);
606 if (!ieee80211_can_queue_work(local
))
609 queue_delayed_work(local
->workqueue
, dwork
, delay
);
611 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
613 u32
ieee802_11_parse_elems_crc(u8
*start
, size_t len
,
614 struct ieee802_11_elems
*elems
,
619 bool calc_crc
= filter
!= 0;
620 DECLARE_BITMAP(seen_elems
, 256);
622 bitmap_zero(seen_elems
, 256);
623 memset(elems
, 0, sizeof(*elems
));
624 elems
->ie_start
= start
;
625 elems
->total_len
= len
;
629 bool elem_parse_failed
;
636 elems
->parse_error
= true;
640 if (id
!= WLAN_EID_VENDOR_SPECIFIC
&&
641 id
!= WLAN_EID_QUIET
&&
642 test_bit(id
, seen_elems
)) {
643 elems
->parse_error
= true;
649 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
650 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
652 elem_parse_failed
= false;
657 elems
->ssid_len
= elen
;
659 case WLAN_EID_SUPP_RATES
:
660 elems
->supp_rates
= pos
;
661 elems
->supp_rates_len
= elen
;
663 case WLAN_EID_FH_PARAMS
:
664 elems
->fh_params
= pos
;
665 elems
->fh_params_len
= elen
;
667 case WLAN_EID_DS_PARAMS
:
668 elems
->ds_params
= pos
;
669 elems
->ds_params_len
= elen
;
671 case WLAN_EID_CF_PARAMS
:
672 elems
->cf_params
= pos
;
673 elems
->cf_params_len
= elen
;
676 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
677 elems
->tim
= (void *)pos
;
678 elems
->tim_len
= elen
;
680 elem_parse_failed
= true;
682 case WLAN_EID_IBSS_PARAMS
:
683 elems
->ibss_params
= pos
;
684 elems
->ibss_params_len
= elen
;
686 case WLAN_EID_CHALLENGE
:
687 elems
->challenge
= pos
;
688 elems
->challenge_len
= elen
;
690 case WLAN_EID_VENDOR_SPECIFIC
:
691 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
693 /* Microsoft OUI (00:50:F2) */
696 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
699 /* OUI Type 1 - WPA IE */
701 elems
->wpa_len
= elen
;
702 } else if (elen
>= 5 && pos
[3] == 2) {
703 /* OUI Type 2 - WMM IE */
705 elems
->wmm_info
= pos
;
706 elems
->wmm_info_len
= elen
;
707 } else if (pos
[4] == 1) {
708 elems
->wmm_param
= pos
;
709 elems
->wmm_param_len
= elen
;
716 elems
->rsn_len
= elen
;
718 case WLAN_EID_ERP_INFO
:
719 elems
->erp_info
= pos
;
720 elems
->erp_info_len
= elen
;
722 case WLAN_EID_EXT_SUPP_RATES
:
723 elems
->ext_supp_rates
= pos
;
724 elems
->ext_supp_rates_len
= elen
;
726 case WLAN_EID_HT_CAPABILITY
:
727 if (elen
>= sizeof(struct ieee80211_ht_cap
))
728 elems
->ht_cap_elem
= (void *)pos
;
730 elem_parse_failed
= true;
732 case WLAN_EID_HT_OPERATION
:
733 if (elen
>= sizeof(struct ieee80211_ht_operation
))
734 elems
->ht_operation
= (void *)pos
;
736 elem_parse_failed
= true;
738 case WLAN_EID_MESH_ID
:
739 elems
->mesh_id
= pos
;
740 elems
->mesh_id_len
= elen
;
742 case WLAN_EID_MESH_CONFIG
:
743 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
744 elems
->mesh_config
= (void *)pos
;
746 elem_parse_failed
= true;
748 case WLAN_EID_PEER_MGMT
:
749 elems
->peering
= pos
;
750 elems
->peering_len
= elen
;
754 elems
->preq_len
= elen
;
758 elems
->prep_len
= elen
;
762 elems
->perr_len
= elen
;
765 if (elen
>= sizeof(struct ieee80211_rann_ie
))
766 elems
->rann
= (void *)pos
;
768 elem_parse_failed
= true;
770 case WLAN_EID_CHANNEL_SWITCH
:
771 elems
->ch_switch_elem
= pos
;
772 elems
->ch_switch_elem_len
= elen
;
775 if (!elems
->quiet_elem
) {
776 elems
->quiet_elem
= pos
;
777 elems
->quiet_elem_len
= elen
;
779 elems
->num_of_quiet_elem
++;
781 case WLAN_EID_COUNTRY
:
782 elems
->country_elem
= pos
;
783 elems
->country_elem_len
= elen
;
785 case WLAN_EID_PWR_CONSTRAINT
:
786 elems
->pwr_constr_elem
= pos
;
787 elems
->pwr_constr_elem_len
= elen
;
789 case WLAN_EID_TIMEOUT_INTERVAL
:
790 elems
->timeout_int
= pos
;
791 elems
->timeout_int_len
= elen
;
797 if (elem_parse_failed
)
798 elems
->parse_error
= true;
800 set_bit(id
, seen_elems
);
807 elems
->parse_error
= true;
812 void ieee802_11_parse_elems(u8
*start
, size_t len
,
813 struct ieee802_11_elems
*elems
)
815 ieee802_11_parse_elems_crc(start
, len
, elems
, 0, 0);
818 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
821 struct ieee80211_local
*local
= sdata
->local
;
822 struct ieee80211_tx_queue_params qparam
;
824 bool use_11b
, enable_qos
;
827 if (!local
->ops
->conf_tx
)
830 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
833 memset(&qparam
, 0, sizeof(qparam
));
835 use_11b
= (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
836 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
839 * By default disable QoS in STA mode for old access points, which do
840 * not support 802.11e. New APs will provide proper queue parameters,
841 * that we will configure later.
843 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
845 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
846 /* Set defaults according to 802.11-2007 Table 7-37 */
855 case IEEE80211_AC_BK
:
856 qparam
.cw_max
= aCWmax
;
857 qparam
.cw_min
= aCWmin
;
861 /* never happens but let's not leave undefined */
863 case IEEE80211_AC_BE
:
864 qparam
.cw_max
= aCWmax
;
865 qparam
.cw_min
= aCWmin
;
869 case IEEE80211_AC_VI
:
870 qparam
.cw_max
= aCWmin
;
871 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
873 qparam
.txop
= 6016/32;
875 qparam
.txop
= 3008/32;
878 case IEEE80211_AC_VO
:
879 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
880 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
882 qparam
.txop
= 3264/32;
884 qparam
.txop
= 1504/32;
889 /* Confiure old 802.11b/g medium access rules. */
890 qparam
.cw_max
= aCWmax
;
891 qparam
.cw_min
= aCWmin
;
896 qparam
.uapsd
= false;
898 sdata
->tx_conf
[ac
] = qparam
;
899 drv_conf_tx(local
, sdata
, ac
, &qparam
);
902 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) {
903 sdata
->vif
.bss_conf
.qos
= enable_qos
;
905 ieee80211_bss_info_change_notify(sdata
,
910 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
911 const size_t supp_rates_len
,
912 const u8
*supp_rates
)
914 struct ieee80211_local
*local
= sdata
->local
;
915 int i
, have_higher_than_11mbit
= 0;
917 /* cf. IEEE 802.11 9.2.12 */
918 for (i
= 0; i
< supp_rates_len
; i
++)
919 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
920 have_higher_than_11mbit
= 1;
922 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
923 have_higher_than_11mbit
)
924 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
926 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
928 ieee80211_set_wmm_default(sdata
, true);
931 u32
ieee80211_mandatory_rates(struct ieee80211_local
*local
,
932 enum ieee80211_band band
)
934 struct ieee80211_supported_band
*sband
;
935 struct ieee80211_rate
*bitrates
;
937 enum ieee80211_rate_flags mandatory_flag
;
940 sband
= local
->hw
.wiphy
->bands
[band
];
944 if (band
== IEEE80211_BAND_2GHZ
)
945 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
947 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
949 bitrates
= sband
->bitrates
;
951 for (i
= 0; i
< sband
->n_bitrates
; i
++)
952 if (bitrates
[i
].flags
& mandatory_flag
)
953 mandatory_rates
|= BIT(i
);
954 return mandatory_rates
;
957 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
958 u16 transaction
, u16 auth_alg
,
959 u8
*extra
, size_t extra_len
, const u8
*da
,
960 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
)
962 struct ieee80211_local
*local
= sdata
->local
;
964 struct ieee80211_mgmt
*mgmt
;
967 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
968 sizeof(*mgmt
) + 6 + extra_len
);
972 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
974 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
975 memset(mgmt
, 0, 24 + 6);
976 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
977 IEEE80211_STYPE_AUTH
);
978 memcpy(mgmt
->da
, da
, ETH_ALEN
);
979 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
980 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
981 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
982 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
983 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
985 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
987 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
988 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
989 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
993 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
994 ieee80211_tx_skb(sdata
, skb
);
997 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
998 const u8
*ie
, size_t ie_len
,
999 enum ieee80211_band band
, u32 rate_mask
,
1002 struct ieee80211_supported_band
*sband
;
1004 size_t offset
= 0, noffset
;
1005 int supp_rates_len
, i
;
1010 sband
= local
->hw
.wiphy
->bands
[band
];
1011 if (WARN_ON_ONCE(!sband
))
1017 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1018 if ((BIT(i
) & rate_mask
) == 0)
1019 continue; /* skip rate */
1020 rates
[num_rates
++] = (u8
) (sband
->bitrates
[i
].bitrate
/ 5);
1023 supp_rates_len
= min_t(int, num_rates
, 8);
1025 *pos
++ = WLAN_EID_SUPP_RATES
;
1026 *pos
++ = supp_rates_len
;
1027 memcpy(pos
, rates
, supp_rates_len
);
1028 pos
+= supp_rates_len
;
1030 /* insert "request information" if in custom IEs */
1032 static const u8 before_extrates
[] = {
1034 WLAN_EID_SUPP_RATES
,
1037 noffset
= ieee80211_ie_split(ie
, ie_len
,
1039 ARRAY_SIZE(before_extrates
),
1041 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1042 pos
+= noffset
- offset
;
1046 ext_rates_len
= num_rates
- supp_rates_len
;
1047 if (ext_rates_len
> 0) {
1048 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1049 *pos
++ = ext_rates_len
;
1050 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1051 pos
+= ext_rates_len
;
1054 if (channel
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1055 *pos
++ = WLAN_EID_DS_PARAMS
;
1060 /* insert custom IEs that go before HT */
1062 static const u8 before_ht
[] = {
1064 WLAN_EID_SUPP_RATES
,
1066 WLAN_EID_EXT_SUPP_RATES
,
1068 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1070 noffset
= ieee80211_ie_split(ie
, ie_len
,
1071 before_ht
, ARRAY_SIZE(before_ht
),
1073 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1074 pos
+= noffset
- offset
;
1078 if (sband
->ht_cap
.ht_supported
)
1079 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1083 * If adding more here, adjust code in main.c
1084 * that calculates local->scan_ies_len.
1087 /* add any remaining custom IEs */
1090 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1091 pos
+= noffset
- offset
;
1094 if (sband
->vht_cap
.vht_supported
)
1095 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1096 sband
->vht_cap
.cap
);
1098 return pos
- buffer
;
1101 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1102 u8
*dst
, u32 ratemask
,
1103 const u8
*ssid
, size_t ssid_len
,
1104 const u8
*ie
, size_t ie_len
,
1107 struct ieee80211_local
*local
= sdata
->local
;
1108 struct sk_buff
*skb
;
1109 struct ieee80211_mgmt
*mgmt
;
1114 /* FIXME: come up with a proper value */
1115 buf
= kmalloc(200 + ie_len
, GFP_KERNEL
);
1120 * Do not send DS Channel parameter for directed probe requests
1121 * in order to maximize the chance that we get a response. Some
1122 * badly-behaved APs don't respond when this parameter is included.
1127 chan
= ieee80211_frequency_to_channel(
1128 local
->hw
.conf
.channel
->center_freq
);
1130 buf_len
= ieee80211_build_preq_ies(local
, buf
, ie
, ie_len
,
1131 local
->hw
.conf
.channel
->band
,
1134 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1141 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1142 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1143 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1146 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1154 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1155 const u8
*ssid
, size_t ssid_len
,
1156 const u8
*ie
, size_t ie_len
,
1157 u32 ratemask
, bool directed
, bool no_cck
)
1159 struct sk_buff
*skb
;
1161 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, ssid
, ssid_len
,
1162 ie
, ie_len
, directed
);
1165 IEEE80211_SKB_CB(skb
)->flags
|=
1166 IEEE80211_TX_CTL_NO_CCK_RATE
;
1167 ieee80211_tx_skb(sdata
, skb
);
1171 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
1172 struct ieee802_11_elems
*elems
,
1173 enum ieee80211_band band
, u32
*basic_rates
)
1175 struct ieee80211_supported_band
*sband
;
1176 struct ieee80211_rate
*bitrates
;
1180 sband
= local
->hw
.wiphy
->bands
[band
];
1182 if (WARN_ON(!sband
))
1185 bitrates
= sband
->bitrates
;
1186 num_rates
= sband
->n_bitrates
;
1188 for (i
= 0; i
< elems
->supp_rates_len
+
1189 elems
->ext_supp_rates_len
; i
++) {
1193 if (i
< elems
->supp_rates_len
)
1194 rate
= elems
->supp_rates
[i
];
1195 else if (elems
->ext_supp_rates
)
1196 rate
= elems
->ext_supp_rates
1197 [i
- elems
->supp_rates_len
];
1198 own_rate
= 5 * (rate
& 0x7f);
1199 is_basic
= !!(rate
& 0x80);
1201 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1204 for (j
= 0; j
< num_rates
; j
++) {
1205 if (bitrates
[j
].bitrate
== own_rate
) {
1206 supp_rates
|= BIT(j
);
1207 if (basic_rates
&& is_basic
)
1208 *basic_rates
|= BIT(j
);
1215 void ieee80211_stop_device(struct ieee80211_local
*local
)
1217 ieee80211_led_radio(local
, false);
1218 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1220 cancel_work_sync(&local
->reconfig_filter
);
1222 flush_workqueue(local
->workqueue
);
1226 int ieee80211_reconfig(struct ieee80211_local
*local
)
1228 struct ieee80211_hw
*hw
= &local
->hw
;
1229 struct ieee80211_sub_if_data
*sdata
;
1230 struct sta_info
*sta
;
1234 if (local
->suspended
)
1235 local
->resuming
= true;
1237 if (local
->wowlan
) {
1238 local
->wowlan
= false;
1239 res
= drv_resume(local
);
1241 local
->resuming
= false;
1248 * res is 1, which means the driver requested
1249 * to go through a regular reset on wakeup.
1253 /* everything else happens only if HW was up & running */
1254 if (!local
->open_count
)
1258 * Upon resume hardware can sometimes be goofy due to
1259 * various platform / driver / bus issues, so restarting
1260 * the device may at times not work immediately. Propagate
1263 res
= drv_start(local
);
1265 WARN(local
->suspended
, "Hardware became unavailable "
1266 "upon resume. This could be a software issue "
1267 "prior to suspend or a hardware issue.\n");
1271 /* setup fragmentation threshold */
1272 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1274 /* setup RTS threshold */
1275 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1277 /* reset coverage class */
1278 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1280 ieee80211_led_radio(local
, true);
1281 ieee80211_mod_tpt_led_trig(local
,
1282 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1284 /* add interfaces */
1285 sdata
= rtnl_dereference(local
->monitor_sdata
);
1287 res
= drv_add_interface(local
, sdata
);
1289 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
1295 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1296 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1297 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1298 ieee80211_sdata_running(sdata
))
1299 res
= drv_add_interface(local
, sdata
);
1303 mutex_lock(&local
->sta_mtx
);
1304 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1305 enum ieee80211_sta_state state
;
1310 /* AP-mode stations will be added later */
1311 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1314 for (state
= IEEE80211_STA_NOTEXIST
;
1315 state
< sta
->sta_state
; state
++)
1316 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1319 mutex_unlock(&local
->sta_mtx
);
1321 /* reconfigure tx conf */
1322 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1323 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1324 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1325 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1326 !ieee80211_sdata_running(sdata
))
1329 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1330 drv_conf_tx(local
, sdata
, i
,
1331 &sdata
->tx_conf
[i
]);
1335 /* reconfigure hardware */
1336 ieee80211_hw_config(local
, ~0);
1338 ieee80211_configure_filter(local
);
1340 /* Finally also reconfigure all the BSS information */
1341 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1344 if (!ieee80211_sdata_running(sdata
))
1347 /* common change flags for all interface types */
1348 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1349 BSS_CHANGED_ERP_PREAMBLE
|
1350 BSS_CHANGED_ERP_SLOT
|
1352 BSS_CHANGED_BASIC_RATES
|
1353 BSS_CHANGED_BEACON_INT
|
1359 switch (sdata
->vif
.type
) {
1360 case NL80211_IFTYPE_STATION
:
1361 changed
|= BSS_CHANGED_ASSOC
|
1362 BSS_CHANGED_ARP_FILTER
;
1363 mutex_lock(&sdata
->u
.mgd
.mtx
);
1364 ieee80211_bss_info_change_notify(sdata
, changed
);
1365 mutex_unlock(&sdata
->u
.mgd
.mtx
);
1367 case NL80211_IFTYPE_ADHOC
:
1368 changed
|= BSS_CHANGED_IBSS
;
1370 case NL80211_IFTYPE_AP
:
1371 changed
|= BSS_CHANGED_SSID
;
1373 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1374 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1377 case NL80211_IFTYPE_MESH_POINT
:
1378 changed
|= BSS_CHANGED_BEACON
|
1379 BSS_CHANGED_BEACON_ENABLED
;
1380 ieee80211_bss_info_change_notify(sdata
, changed
);
1382 case NL80211_IFTYPE_WDS
:
1384 case NL80211_IFTYPE_AP_VLAN
:
1385 case NL80211_IFTYPE_MONITOR
:
1386 /* ignore virtual */
1388 case NL80211_IFTYPE_UNSPECIFIED
:
1389 case NUM_NL80211_IFTYPES
:
1390 case NL80211_IFTYPE_P2P_CLIENT
:
1391 case NL80211_IFTYPE_P2P_GO
:
1397 ieee80211_recalc_ps(local
, -1);
1400 * The sta might be in psm against the ap (e.g. because
1401 * this was the state before a hw restart), so we
1402 * explicitly send a null packet in order to make sure
1403 * it'll sync against the ap (and get out of psm).
1405 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1406 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1407 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1410 ieee80211_send_nullfunc(local
, sdata
, 0);
1414 /* APs are now beaconing, add back stations */
1415 mutex_lock(&local
->sta_mtx
);
1416 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1417 enum ieee80211_sta_state state
;
1422 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1425 for (state
= IEEE80211_STA_NOTEXIST
;
1426 state
< sta
->sta_state
; state
++)
1427 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1430 mutex_unlock(&local
->sta_mtx
);
1433 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1434 if (ieee80211_sdata_running(sdata
))
1435 ieee80211_enable_keys(sdata
);
1438 local
->in_reconfig
= false;
1442 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1443 * sessions can be established after a resume.
1445 * Also tear down aggregation sessions since reconfiguring
1446 * them in a hardware restart scenario is not easily done
1447 * right now, and the hardware will have lost information
1448 * about the sessions, but we and the AP still think they
1449 * are active. This is really a workaround though.
1451 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1452 mutex_lock(&local
->sta_mtx
);
1454 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1455 ieee80211_sta_tear_down_BA_sessions(sta
, true);
1456 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1459 mutex_unlock(&local
->sta_mtx
);
1462 ieee80211_wake_queues_by_reason(hw
,
1463 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1466 * If this is for hw restart things are still running.
1467 * We may want to change that later, however.
1469 if (!local
->suspended
)
1473 /* first set suspended false, then resuming */
1474 local
->suspended
= false;
1476 local
->resuming
= false;
1478 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1479 switch(sdata
->vif
.type
) {
1480 case NL80211_IFTYPE_STATION
:
1481 ieee80211_sta_restart(sdata
);
1483 case NL80211_IFTYPE_ADHOC
:
1484 ieee80211_ibss_restart(sdata
);
1486 case NL80211_IFTYPE_MESH_POINT
:
1487 ieee80211_mesh_restart(sdata
);
1494 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1496 mutex_lock(&local
->sta_mtx
);
1497 list_for_each_entry(sta
, &local
->sta_list
, list
)
1498 mesh_plink_restart(sta
);
1499 mutex_unlock(&local
->sta_mtx
);
1506 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1508 struct ieee80211_sub_if_data
*sdata
;
1509 struct ieee80211_local
*local
;
1510 struct ieee80211_key
*key
;
1515 sdata
= vif_to_sdata(vif
);
1516 local
= sdata
->local
;
1518 if (WARN_ON(!local
->resuming
))
1521 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1524 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1526 mutex_lock(&local
->key_mtx
);
1527 list_for_each_entry(key
, &sdata
->key_list
, list
)
1528 key
->flags
|= KEY_FLAG_TAINTED
;
1529 mutex_unlock(&local
->key_mtx
);
1531 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1533 static int check_mgd_smps(struct ieee80211_if_managed
*ifmgd
,
1534 enum ieee80211_smps_mode
*smps_mode
)
1536 if (ifmgd
->associated
) {
1537 *smps_mode
= ifmgd
->ap_smps
;
1539 if (*smps_mode
== IEEE80211_SMPS_AUTOMATIC
) {
1540 if (ifmgd
->powersave
)
1541 *smps_mode
= IEEE80211_SMPS_DYNAMIC
;
1543 *smps_mode
= IEEE80211_SMPS_OFF
;
1552 /* must hold iflist_mtx */
1553 void ieee80211_recalc_smps(struct ieee80211_local
*local
)
1555 struct ieee80211_sub_if_data
*sdata
;
1556 enum ieee80211_smps_mode smps_mode
= IEEE80211_SMPS_OFF
;
1559 lockdep_assert_held(&local
->iflist_mtx
);
1562 * This function could be improved to handle multiple
1563 * interfaces better, but right now it makes any
1564 * non-station interfaces force SM PS to be turned
1565 * off. If there are multiple station interfaces it
1566 * could also use the best possible mode, e.g. if
1567 * one is in static and the other in dynamic then
1571 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1572 if (!ieee80211_sdata_running(sdata
))
1574 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1577 count
+= check_mgd_smps(&sdata
->u
.mgd
, &smps_mode
);
1580 smps_mode
= IEEE80211_SMPS_OFF
;
1585 if (smps_mode
== local
->smps_mode
)
1589 local
->smps_mode
= smps_mode
;
1590 /* changed flag is auto-detected for this */
1591 ieee80211_hw_config(local
, 0);
1594 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1598 for (i
= 0; i
< n_ids
; i
++)
1605 * ieee80211_ie_split - split an IE buffer according to ordering
1607 * @ies: the IE buffer
1608 * @ielen: the length of the IE buffer
1609 * @ids: an array with element IDs that are allowed before
1611 * @n_ids: the size of the element ID array
1612 * @offset: offset where to start splitting in the buffer
1614 * This function splits an IE buffer by updating the @offset
1615 * variable to point to the location where the buffer should be
1618 * It assumes that the given IE buffer is well-formed, this
1619 * has to be guaranteed by the caller!
1621 * It also assumes that the IEs in the buffer are ordered
1622 * correctly, if not the result of using this function will not
1623 * be ordered correctly either, i.e. it does no reordering.
1625 * The function returns the offset where the next part of the
1626 * buffer starts, which may be @ielen if the entire (remainder)
1627 * of the buffer should be used.
1629 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1630 const u8
*ids
, int n_ids
, size_t offset
)
1632 size_t pos
= offset
;
1634 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1635 pos
+= 2 + ies
[pos
+ 1];
1640 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1642 size_t pos
= offset
;
1644 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1645 pos
+= 2 + ies
[pos
+ 1];
1650 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1654 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1656 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1660 * Scale up threshold values before storing it, as the RSSI averaging
1661 * algorithm uses a scaled up value as well. Change this scaling
1662 * factor if the RSSI averaging algorithm changes.
1664 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1665 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1668 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1672 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1674 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1675 rssi_min_thold
> rssi_max_thold
);
1677 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1680 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1682 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1684 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1686 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1688 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1690 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1695 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1696 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1697 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1699 /* capability flags */
1700 tmp
= cpu_to_le16(cap
);
1701 memcpy(pos
, &tmp
, sizeof(u16
));
1704 /* AMPDU parameters */
1705 *pos
++ = ht_cap
->ampdu_factor
|
1706 (ht_cap
->ampdu_density
<<
1707 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1710 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1711 pos
+= sizeof(ht_cap
->mcs
);
1713 /* extended capabilities */
1714 pos
+= sizeof(__le16
);
1716 /* BF capabilities */
1717 pos
+= sizeof(__le32
);
1719 /* antenna selection */
1725 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
1730 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
1731 *pos
++ = sizeof(struct ieee80211_vht_capabilities
);
1732 memset(pos
, 0, sizeof(struct ieee80211_vht_capabilities
));
1734 /* capability flags */
1735 tmp
= cpu_to_le32(cap
);
1736 memcpy(pos
, &tmp
, sizeof(u32
));
1740 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
1741 pos
+= sizeof(vht_cap
->vht_mcs
);
1746 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1747 struct ieee80211_channel
*channel
,
1748 enum nl80211_channel_type channel_type
,
1751 struct ieee80211_ht_operation
*ht_oper
;
1752 /* Build HT Information */
1753 *pos
++ = WLAN_EID_HT_OPERATION
;
1754 *pos
++ = sizeof(struct ieee80211_ht_operation
);
1755 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
1756 ht_oper
->primary_chan
=
1757 ieee80211_frequency_to_channel(channel
->center_freq
);
1758 switch (channel_type
) {
1759 case NL80211_CHAN_HT40MINUS
:
1760 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1762 case NL80211_CHAN_HT40PLUS
:
1763 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1765 case NL80211_CHAN_HT20
:
1767 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1770 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
1771 channel_type
!= NL80211_CHAN_NO_HT
&&
1772 channel_type
!= NL80211_CHAN_HT20
)
1773 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1775 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
1776 ht_oper
->stbc_param
= 0x0000;
1778 /* It seems that Basic MCS set and Supported MCS set
1779 are identical for the first 10 bytes */
1780 memset(&ht_oper
->basic_set
, 0, 16);
1781 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
1783 return pos
+ sizeof(struct ieee80211_ht_operation
);
1786 enum nl80211_channel_type
1787 ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation
*ht_oper
)
1789 enum nl80211_channel_type channel_type
;
1792 return NL80211_CHAN_NO_HT
;
1794 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
1795 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1796 channel_type
= NL80211_CHAN_HT20
;
1798 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1799 channel_type
= NL80211_CHAN_HT40PLUS
;
1801 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1802 channel_type
= NL80211_CHAN_HT40MINUS
;
1805 channel_type
= NL80211_CHAN_NO_HT
;
1808 return channel_type
;
1811 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
1812 struct sk_buff
*skb
, bool need_basic
)
1814 struct ieee80211_local
*local
= sdata
->local
;
1815 struct ieee80211_supported_band
*sband
;
1818 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
1820 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1821 rates
= sband
->n_bitrates
;
1825 if (skb_tailroom(skb
) < rates
+ 2)
1828 pos
= skb_put(skb
, rates
+ 2);
1829 *pos
++ = WLAN_EID_SUPP_RATES
;
1831 for (i
= 0; i
< rates
; i
++) {
1833 if (need_basic
&& basic_rates
& BIT(i
))
1835 rate
= sband
->bitrates
[i
].bitrate
;
1836 *pos
++ = basic
| (u8
) (rate
/ 5);
1842 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
1843 struct sk_buff
*skb
, bool need_basic
)
1845 struct ieee80211_local
*local
= sdata
->local
;
1846 struct ieee80211_supported_band
*sband
;
1848 u8 i
, exrates
, *pos
;
1849 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
1851 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1852 exrates
= sband
->n_bitrates
;
1858 if (skb_tailroom(skb
) < exrates
+ 2)
1862 pos
= skb_put(skb
, exrates
+ 2);
1863 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1865 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
1867 if (need_basic
&& basic_rates
& BIT(i
))
1869 rate
= sband
->bitrates
[i
].bitrate
;
1870 *pos
++ = basic
| (u8
) (rate
/ 5);
1876 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
1878 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1879 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1881 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
1882 /* non-managed type inferfaces */
1885 return ifmgd
->ave_beacon_signal
;
1887 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);