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(struct ieee80211_local
*local
, 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 (local
->hw
.conf
.channel
->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
,
166 struct ieee80211_rate
*rate
)
168 struct ieee80211_local
*local
= hw_to_local(hw
);
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(local
, 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
[local
->hw
.conf
.channel
->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(local
, 10, rate
->bitrate
,
217 erp
, short_preamble
);
218 /* Data frame duration */
219 dur
+= ieee80211_frame_duration(local
, frame_len
, rate
->bitrate
,
220 erp
, short_preamble
);
222 dur
+= ieee80211_frame_duration(local
, 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
[local
->hw
.conf
.channel
->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(local
, frame_len
, rate
->bitrate
,
257 erp
, short_preamble
);
258 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
260 dur
+= ieee80211_frame_duration(local
, 10, rate
->bitrate
,
261 erp
, short_preamble
);
264 return cpu_to_le16(dur
);
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
268 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
269 enum queue_stop_reason reason
)
271 struct ieee80211_local
*local
= hw_to_local(hw
);
272 struct ieee80211_sub_if_data
*sdata
;
274 trace_wake_queue(local
, queue
, reason
);
276 if (WARN_ON(queue
>= hw
->queues
))
279 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
281 if (local
->queue_stop_reasons
[queue
] != 0)
282 /* someone still has this queue stopped */
285 if (skb_queue_empty(&local
->pending
[queue
])) {
287 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
288 if (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
290 netif_wake_subqueue(sdata
->dev
, queue
);
294 tasklet_schedule(&local
->tx_pending_tasklet
);
297 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
298 enum queue_stop_reason reason
)
300 struct ieee80211_local
*local
= hw_to_local(hw
);
303 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
304 __ieee80211_wake_queue(hw
, queue
, reason
);
305 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
308 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
310 ieee80211_wake_queue_by_reason(hw
, queue
,
311 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
313 EXPORT_SYMBOL(ieee80211_wake_queue
);
315 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
316 enum queue_stop_reason reason
)
318 struct ieee80211_local
*local
= hw_to_local(hw
);
319 struct ieee80211_sub_if_data
*sdata
;
321 trace_stop_queue(local
, queue
, reason
);
323 if (WARN_ON(queue
>= hw
->queues
))
326 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
329 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
330 netif_stop_subqueue(sdata
->dev
, queue
);
334 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
335 enum queue_stop_reason reason
)
337 struct ieee80211_local
*local
= hw_to_local(hw
);
340 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
341 __ieee80211_stop_queue(hw
, queue
, reason
);
342 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
345 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
347 ieee80211_stop_queue_by_reason(hw
, queue
,
348 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
350 EXPORT_SYMBOL(ieee80211_stop_queue
);
352 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
355 struct ieee80211_hw
*hw
= &local
->hw
;
357 int queue
= skb_get_queue_mapping(skb
);
358 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
360 if (WARN_ON(!info
->control
.vif
)) {
365 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
366 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
367 __skb_queue_tail(&local
->pending
[queue
], skb
);
368 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
369 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
372 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
373 struct sk_buff_head
*skbs
,
374 void (*fn
)(void *data
), void *data
)
376 struct ieee80211_hw
*hw
= &local
->hw
;
381 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
382 for (i
= 0; i
< hw
->queues
; i
++)
383 __ieee80211_stop_queue(hw
, i
,
384 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
386 while ((skb
= skb_dequeue(skbs
))) {
387 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
389 if (WARN_ON(!info
->control
.vif
)) {
394 queue
= skb_get_queue_mapping(skb
);
395 __skb_queue_tail(&local
->pending
[queue
], skb
);
401 for (i
= 0; i
< hw
->queues
; i
++)
402 __ieee80211_wake_queue(hw
, i
,
403 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
404 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
407 void ieee80211_add_pending_skbs(struct ieee80211_local
*local
,
408 struct sk_buff_head
*skbs
)
410 ieee80211_add_pending_skbs_fn(local
, skbs
, NULL
, NULL
);
413 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
414 enum queue_stop_reason reason
)
416 struct ieee80211_local
*local
= hw_to_local(hw
);
420 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
422 for (i
= 0; i
< hw
->queues
; i
++)
423 __ieee80211_stop_queue(hw
, i
, reason
);
425 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
428 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
430 ieee80211_stop_queues_by_reason(hw
,
431 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
433 EXPORT_SYMBOL(ieee80211_stop_queues
);
435 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
437 struct ieee80211_local
*local
= hw_to_local(hw
);
441 if (WARN_ON(queue
>= hw
->queues
))
444 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
445 ret
= !!local
->queue_stop_reasons
[queue
];
446 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
449 EXPORT_SYMBOL(ieee80211_queue_stopped
);
451 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
452 enum queue_stop_reason reason
)
454 struct ieee80211_local
*local
= hw_to_local(hw
);
458 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
460 for (i
= 0; i
< hw
->queues
; i
++)
461 __ieee80211_wake_queue(hw
, i
, reason
);
463 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
466 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
468 ieee80211_wake_queues_by_reason(hw
, IEEE80211_QUEUE_STOP_REASON_DRIVER
);
470 EXPORT_SYMBOL(ieee80211_wake_queues
);
472 void ieee80211_iterate_active_interfaces(
473 struct ieee80211_hw
*hw
,
474 void (*iterator
)(void *data
, u8
*mac
,
475 struct ieee80211_vif
*vif
),
478 struct ieee80211_local
*local
= hw_to_local(hw
);
479 struct ieee80211_sub_if_data
*sdata
;
481 mutex_lock(&local
->iflist_mtx
);
483 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
484 switch (sdata
->vif
.type
) {
485 case NL80211_IFTYPE_MONITOR
:
486 case NL80211_IFTYPE_AP_VLAN
:
491 if (ieee80211_sdata_running(sdata
))
492 iterator(data
, sdata
->vif
.addr
,
496 mutex_unlock(&local
->iflist_mtx
);
498 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
500 void ieee80211_iterate_active_interfaces_atomic(
501 struct ieee80211_hw
*hw
,
502 void (*iterator
)(void *data
, u8
*mac
,
503 struct ieee80211_vif
*vif
),
506 struct ieee80211_local
*local
= hw_to_local(hw
);
507 struct ieee80211_sub_if_data
*sdata
;
511 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
512 switch (sdata
->vif
.type
) {
513 case NL80211_IFTYPE_MONITOR
:
514 case NL80211_IFTYPE_AP_VLAN
:
519 if (ieee80211_sdata_running(sdata
))
520 iterator(data
, sdata
->vif
.addr
,
526 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
529 * Nothing should have been stuffed into the workqueue during
530 * the suspend->resume cycle. If this WARN is seen then there
531 * is a bug with either the driver suspend or something in
532 * mac80211 stuffing into the workqueue which we haven't yet
533 * cleared during mac80211's suspend cycle.
535 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
537 if (WARN(local
->suspended
&& !local
->resuming
,
538 "queueing ieee80211 work while going to suspend\n"))
544 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
546 struct ieee80211_local
*local
= hw_to_local(hw
);
548 if (!ieee80211_can_queue_work(local
))
551 queue_work(local
->workqueue
, work
);
553 EXPORT_SYMBOL(ieee80211_queue_work
);
555 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
556 struct delayed_work
*dwork
,
559 struct ieee80211_local
*local
= hw_to_local(hw
);
561 if (!ieee80211_can_queue_work(local
))
564 queue_delayed_work(local
->workqueue
, dwork
, delay
);
566 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
568 u32
ieee802_11_parse_elems_crc(u8
*start
, size_t len
,
569 struct ieee802_11_elems
*elems
,
574 bool calc_crc
= filter
!= 0;
576 memset(elems
, 0, sizeof(*elems
));
577 elems
->ie_start
= start
;
578 elems
->total_len
= len
;
590 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
591 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
596 elems
->ssid_len
= elen
;
598 case WLAN_EID_SUPP_RATES
:
599 elems
->supp_rates
= pos
;
600 elems
->supp_rates_len
= elen
;
602 case WLAN_EID_FH_PARAMS
:
603 elems
->fh_params
= pos
;
604 elems
->fh_params_len
= elen
;
606 case WLAN_EID_DS_PARAMS
:
607 elems
->ds_params
= pos
;
608 elems
->ds_params_len
= elen
;
610 case WLAN_EID_CF_PARAMS
:
611 elems
->cf_params
= pos
;
612 elems
->cf_params_len
= elen
;
615 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
616 elems
->tim
= (void *)pos
;
617 elems
->tim_len
= elen
;
620 case WLAN_EID_IBSS_PARAMS
:
621 elems
->ibss_params
= pos
;
622 elems
->ibss_params_len
= elen
;
624 case WLAN_EID_CHALLENGE
:
625 elems
->challenge
= pos
;
626 elems
->challenge_len
= elen
;
628 case WLAN_EID_VENDOR_SPECIFIC
:
629 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
631 /* Microsoft OUI (00:50:F2) */
634 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
637 /* OUI Type 1 - WPA IE */
639 elems
->wpa_len
= elen
;
640 } else if (elen
>= 5 && pos
[3] == 2) {
641 /* OUI Type 2 - WMM IE */
643 elems
->wmm_info
= pos
;
644 elems
->wmm_info_len
= elen
;
645 } else if (pos
[4] == 1) {
646 elems
->wmm_param
= pos
;
647 elems
->wmm_param_len
= elen
;
654 elems
->rsn_len
= elen
;
656 case WLAN_EID_ERP_INFO
:
657 elems
->erp_info
= pos
;
658 elems
->erp_info_len
= elen
;
660 case WLAN_EID_EXT_SUPP_RATES
:
661 elems
->ext_supp_rates
= pos
;
662 elems
->ext_supp_rates_len
= elen
;
664 case WLAN_EID_HT_CAPABILITY
:
665 if (elen
>= sizeof(struct ieee80211_ht_cap
))
666 elems
->ht_cap_elem
= (void *)pos
;
668 case WLAN_EID_HT_INFORMATION
:
669 if (elen
>= sizeof(struct ieee80211_ht_info
))
670 elems
->ht_info_elem
= (void *)pos
;
672 case WLAN_EID_MESH_ID
:
673 elems
->mesh_id
= pos
;
674 elems
->mesh_id_len
= elen
;
676 case WLAN_EID_MESH_CONFIG
:
677 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
678 elems
->mesh_config
= (void *)pos
;
680 case WLAN_EID_PEER_MGMT
:
681 elems
->peering
= pos
;
682 elems
->peering_len
= elen
;
686 elems
->preq_len
= elen
;
690 elems
->prep_len
= elen
;
694 elems
->perr_len
= elen
;
697 if (elen
>= sizeof(struct ieee80211_rann_ie
))
698 elems
->rann
= (void *)pos
;
700 case WLAN_EID_CHANNEL_SWITCH
:
701 elems
->ch_switch_elem
= pos
;
702 elems
->ch_switch_elem_len
= elen
;
705 if (!elems
->quiet_elem
) {
706 elems
->quiet_elem
= pos
;
707 elems
->quiet_elem_len
= elen
;
709 elems
->num_of_quiet_elem
++;
711 case WLAN_EID_COUNTRY
:
712 elems
->country_elem
= pos
;
713 elems
->country_elem_len
= elen
;
715 case WLAN_EID_PWR_CONSTRAINT
:
716 elems
->pwr_constr_elem
= pos
;
717 elems
->pwr_constr_elem_len
= elen
;
719 case WLAN_EID_TIMEOUT_INTERVAL
:
720 elems
->timeout_int
= pos
;
721 elems
->timeout_int_len
= elen
;
734 void ieee802_11_parse_elems(u8
*start
, size_t len
,
735 struct ieee802_11_elems
*elems
)
737 ieee802_11_parse_elems_crc(start
, len
, elems
, 0, 0);
740 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
)
742 struct ieee80211_local
*local
= sdata
->local
;
743 struct ieee80211_tx_queue_params qparam
;
748 if (!local
->ops
->conf_tx
)
751 memset(&qparam
, 0, sizeof(qparam
));
753 use_11b
= (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
754 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
756 for (queue
= 0; queue
< local_to_hw(local
)->queues
; queue
++) {
757 /* Set defaults according to 802.11-2007 Table 7-37 */
766 qparam
.cw_max
= aCWmax
;
767 qparam
.cw_min
= aCWmin
;
771 default: /* never happens but let's not leave undefined */
773 qparam
.cw_max
= aCWmax
;
774 qparam
.cw_min
= aCWmin
;
779 qparam
.cw_max
= aCWmin
;
780 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
782 qparam
.txop
= 6016/32;
784 qparam
.txop
= 3008/32;
788 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
789 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
791 qparam
.txop
= 3264/32;
793 qparam
.txop
= 1504/32;
798 qparam
.uapsd
= false;
800 sdata
->tx_conf
[queue
] = qparam
;
801 drv_conf_tx(local
, sdata
, queue
, &qparam
);
804 /* after reinitialize QoS TX queues setting to default,
805 * disable QoS at all */
807 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) {
808 sdata
->vif
.bss_conf
.qos
=
809 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
;
810 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
814 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
815 const size_t supp_rates_len
,
816 const u8
*supp_rates
)
818 struct ieee80211_local
*local
= sdata
->local
;
819 int i
, have_higher_than_11mbit
= 0;
821 /* cf. IEEE 802.11 9.2.12 */
822 for (i
= 0; i
< supp_rates_len
; i
++)
823 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
824 have_higher_than_11mbit
= 1;
826 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
827 have_higher_than_11mbit
)
828 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
830 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
832 ieee80211_set_wmm_default(sdata
);
835 u32
ieee80211_mandatory_rates(struct ieee80211_local
*local
,
836 enum ieee80211_band band
)
838 struct ieee80211_supported_band
*sband
;
839 struct ieee80211_rate
*bitrates
;
841 enum ieee80211_rate_flags mandatory_flag
;
844 sband
= local
->hw
.wiphy
->bands
[band
];
847 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
850 if (band
== IEEE80211_BAND_2GHZ
)
851 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
853 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
855 bitrates
= sband
->bitrates
;
857 for (i
= 0; i
< sband
->n_bitrates
; i
++)
858 if (bitrates
[i
].flags
& mandatory_flag
)
859 mandatory_rates
|= BIT(i
);
860 return mandatory_rates
;
863 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
864 u16 transaction
, u16 auth_alg
,
865 u8
*extra
, size_t extra_len
, const u8
*da
,
866 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
)
868 struct ieee80211_local
*local
= sdata
->local
;
870 struct ieee80211_mgmt
*mgmt
;
873 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
874 sizeof(*mgmt
) + 6 + extra_len
);
878 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
880 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
881 memset(mgmt
, 0, 24 + 6);
882 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
883 IEEE80211_STYPE_AUTH
);
884 memcpy(mgmt
->da
, da
, ETH_ALEN
);
885 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
886 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
887 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
888 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
889 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
891 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
893 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
894 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
895 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
899 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
900 ieee80211_tx_skb(sdata
, skb
);
903 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
904 const u8
*ie
, size_t ie_len
,
905 enum ieee80211_band band
, u32 rate_mask
,
908 struct ieee80211_supported_band
*sband
;
910 size_t offset
= 0, noffset
;
911 int supp_rates_len
, i
;
916 sband
= local
->hw
.wiphy
->bands
[band
];
921 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
922 if ((BIT(i
) & rate_mask
) == 0)
923 continue; /* skip rate */
924 rates
[num_rates
++] = (u8
) (sband
->bitrates
[i
].bitrate
/ 5);
927 supp_rates_len
= min_t(int, num_rates
, 8);
929 *pos
++ = WLAN_EID_SUPP_RATES
;
930 *pos
++ = supp_rates_len
;
931 memcpy(pos
, rates
, supp_rates_len
);
932 pos
+= supp_rates_len
;
934 /* insert "request information" if in custom IEs */
936 static const u8 before_extrates
[] = {
941 noffset
= ieee80211_ie_split(ie
, ie_len
,
943 ARRAY_SIZE(before_extrates
),
945 memcpy(pos
, ie
+ offset
, noffset
- offset
);
946 pos
+= noffset
- offset
;
950 ext_rates_len
= num_rates
- supp_rates_len
;
951 if (ext_rates_len
> 0) {
952 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
953 *pos
++ = ext_rates_len
;
954 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
955 pos
+= ext_rates_len
;
958 if (channel
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
959 *pos
++ = WLAN_EID_DS_PARAMS
;
964 /* insert custom IEs that go before HT */
966 static const u8 before_ht
[] = {
970 WLAN_EID_EXT_SUPP_RATES
,
972 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
974 noffset
= ieee80211_ie_split(ie
, ie_len
,
975 before_ht
, ARRAY_SIZE(before_ht
),
977 memcpy(pos
, ie
+ offset
, noffset
- offset
);
978 pos
+= noffset
- offset
;
982 if (sband
->ht_cap
.ht_supported
)
983 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
987 * If adding more here, adjust code in main.c
988 * that calculates local->scan_ies_len.
991 /* add any remaining custom IEs */
994 memcpy(pos
, ie
+ offset
, noffset
- offset
);
995 pos
+= noffset
- offset
;
1001 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1002 u8
*dst
, u32 ratemask
,
1003 const u8
*ssid
, size_t ssid_len
,
1004 const u8
*ie
, size_t ie_len
,
1007 struct ieee80211_local
*local
= sdata
->local
;
1008 struct sk_buff
*skb
;
1009 struct ieee80211_mgmt
*mgmt
;
1014 /* FIXME: come up with a proper value */
1015 buf
= kmalloc(200 + ie_len
, GFP_KERNEL
);
1020 * Do not send DS Channel parameter for directed probe requests
1021 * in order to maximize the chance that we get a response. Some
1022 * badly-behaved APs don't respond when this parameter is included.
1027 chan
= ieee80211_frequency_to_channel(
1028 local
->hw
.conf
.channel
->center_freq
);
1030 buf_len
= ieee80211_build_preq_ies(local
, buf
, ie
, ie_len
,
1031 local
->hw
.conf
.channel
->band
,
1034 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1041 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1042 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1043 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1046 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1054 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1055 const u8
*ssid
, size_t ssid_len
,
1056 const u8
*ie
, size_t ie_len
,
1057 u32 ratemask
, bool directed
, bool no_cck
)
1059 struct sk_buff
*skb
;
1061 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, ssid
, ssid_len
,
1062 ie
, ie_len
, directed
);
1065 IEEE80211_SKB_CB(skb
)->flags
|=
1066 IEEE80211_TX_CTL_NO_CCK_RATE
;
1067 ieee80211_tx_skb(sdata
, skb
);
1071 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
1072 struct ieee802_11_elems
*elems
,
1073 enum ieee80211_band band
)
1075 struct ieee80211_supported_band
*sband
;
1076 struct ieee80211_rate
*bitrates
;
1080 sband
= local
->hw
.wiphy
->bands
[band
];
1084 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1087 bitrates
= sband
->bitrates
;
1088 num_rates
= sband
->n_bitrates
;
1090 for (i
= 0; i
< elems
->supp_rates_len
+
1091 elems
->ext_supp_rates_len
; i
++) {
1094 if (i
< elems
->supp_rates_len
)
1095 rate
= elems
->supp_rates
[i
];
1096 else if (elems
->ext_supp_rates
)
1097 rate
= elems
->ext_supp_rates
1098 [i
- elems
->supp_rates_len
];
1099 own_rate
= 5 * (rate
& 0x7f);
1100 for (j
= 0; j
< num_rates
; j
++)
1101 if (bitrates
[j
].bitrate
== own_rate
)
1102 supp_rates
|= BIT(j
);
1107 void ieee80211_stop_device(struct ieee80211_local
*local
)
1109 ieee80211_led_radio(local
, false);
1110 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1112 cancel_work_sync(&local
->reconfig_filter
);
1114 flush_workqueue(local
->workqueue
);
1118 int ieee80211_reconfig(struct ieee80211_local
*local
)
1120 struct ieee80211_hw
*hw
= &local
->hw
;
1121 struct ieee80211_sub_if_data
*sdata
;
1122 struct sta_info
*sta
;
1126 if (local
->suspended
)
1127 local
->resuming
= true;
1129 if (local
->wowlan
) {
1130 local
->wowlan
= false;
1131 res
= drv_resume(local
);
1133 local
->resuming
= false;
1140 * res is 1, which means the driver requested
1141 * to go through a regular reset on wakeup.
1145 /* everything else happens only if HW was up & running */
1146 if (!local
->open_count
)
1150 * Upon resume hardware can sometimes be goofy due to
1151 * various platform / driver / bus issues, so restarting
1152 * the device may at times not work immediately. Propagate
1155 res
= drv_start(local
);
1157 WARN(local
->suspended
, "Hardware became unavailable "
1158 "upon resume. This could be a software issue "
1159 "prior to suspend or a hardware issue.\n");
1163 /* setup fragmentation threshold */
1164 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1166 /* setup RTS threshold */
1167 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1169 /* reset coverage class */
1170 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1172 ieee80211_led_radio(local
, true);
1173 ieee80211_mod_tpt_led_trig(local
,
1174 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1176 /* add interfaces */
1177 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1178 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1179 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1180 ieee80211_sdata_running(sdata
))
1181 res
= drv_add_interface(local
, sdata
);
1185 mutex_lock(&local
->sta_mtx
);
1186 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1187 if (sta
->uploaded
) {
1189 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1190 sdata
= container_of(sdata
->bss
,
1191 struct ieee80211_sub_if_data
,
1194 WARN_ON(drv_sta_add(local
, sdata
, &sta
->sta
));
1197 mutex_unlock(&local
->sta_mtx
);
1199 /* reconfigure tx conf */
1200 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1201 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1202 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1203 !ieee80211_sdata_running(sdata
))
1206 for (i
= 0; i
< hw
->queues
; i
++)
1207 drv_conf_tx(local
, sdata
, i
, &sdata
->tx_conf
[i
]);
1210 /* reconfigure hardware */
1211 ieee80211_hw_config(local
, ~0);
1213 ieee80211_configure_filter(local
);
1215 /* Finally also reconfigure all the BSS information */
1216 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1219 if (!ieee80211_sdata_running(sdata
))
1222 /* common change flags for all interface types */
1223 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1224 BSS_CHANGED_ERP_PREAMBLE
|
1225 BSS_CHANGED_ERP_SLOT
|
1227 BSS_CHANGED_BASIC_RATES
|
1228 BSS_CHANGED_BEACON_INT
|
1234 switch (sdata
->vif
.type
) {
1235 case NL80211_IFTYPE_STATION
:
1236 changed
|= BSS_CHANGED_ASSOC
|
1237 BSS_CHANGED_ARP_FILTER
;
1238 mutex_lock(&sdata
->u
.mgd
.mtx
);
1239 ieee80211_bss_info_change_notify(sdata
, changed
);
1240 mutex_unlock(&sdata
->u
.mgd
.mtx
);
1242 case NL80211_IFTYPE_ADHOC
:
1243 changed
|= BSS_CHANGED_IBSS
;
1245 case NL80211_IFTYPE_AP
:
1246 changed
|= BSS_CHANGED_SSID
;
1248 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1249 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1252 case NL80211_IFTYPE_MESH_POINT
:
1253 changed
|= BSS_CHANGED_BEACON
|
1254 BSS_CHANGED_BEACON_ENABLED
;
1255 ieee80211_bss_info_change_notify(sdata
, changed
);
1257 case NL80211_IFTYPE_WDS
:
1259 case NL80211_IFTYPE_AP_VLAN
:
1260 case NL80211_IFTYPE_MONITOR
:
1261 /* ignore virtual */
1263 case NL80211_IFTYPE_UNSPECIFIED
:
1264 case NUM_NL80211_IFTYPES
:
1265 case NL80211_IFTYPE_P2P_CLIENT
:
1266 case NL80211_IFTYPE_P2P_GO
:
1272 ieee80211_recalc_ps(local
, -1);
1275 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1276 * sessions can be established after a resume.
1278 * Also tear down aggregation sessions since reconfiguring
1279 * them in a hardware restart scenario is not easily done
1280 * right now, and the hardware will have lost information
1281 * about the sessions, but we and the AP still think they
1282 * are active. This is really a workaround though.
1284 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1285 mutex_lock(&local
->sta_mtx
);
1287 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1288 ieee80211_sta_tear_down_BA_sessions(sta
, true);
1289 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1292 mutex_unlock(&local
->sta_mtx
);
1296 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1297 if (ieee80211_sdata_running(sdata
))
1298 ieee80211_enable_keys(sdata
);
1301 ieee80211_wake_queues_by_reason(hw
,
1302 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1305 * If this is for hw restart things are still running.
1306 * We may want to change that later, however.
1308 if (!local
->suspended
)
1312 /* first set suspended false, then resuming */
1313 local
->suspended
= false;
1315 local
->resuming
= false;
1317 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1318 switch(sdata
->vif
.type
) {
1319 case NL80211_IFTYPE_STATION
:
1320 ieee80211_sta_restart(sdata
);
1322 case NL80211_IFTYPE_ADHOC
:
1323 ieee80211_ibss_restart(sdata
);
1325 case NL80211_IFTYPE_MESH_POINT
:
1326 ieee80211_mesh_restart(sdata
);
1333 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1335 mutex_lock(&local
->sta_mtx
);
1336 list_for_each_entry(sta
, &local
->sta_list
, list
)
1337 mesh_plink_restart(sta
);
1338 mutex_unlock(&local
->sta_mtx
);
1345 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1347 struct ieee80211_sub_if_data
*sdata
;
1348 struct ieee80211_local
*local
;
1349 struct ieee80211_key
*key
;
1354 sdata
= vif_to_sdata(vif
);
1355 local
= sdata
->local
;
1357 if (WARN_ON(!local
->resuming
))
1360 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1363 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1365 mutex_lock(&local
->key_mtx
);
1366 list_for_each_entry(key
, &sdata
->key_list
, list
)
1367 key
->flags
|= KEY_FLAG_TAINTED
;
1368 mutex_unlock(&local
->key_mtx
);
1370 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1372 static int check_mgd_smps(struct ieee80211_if_managed
*ifmgd
,
1373 enum ieee80211_smps_mode
*smps_mode
)
1375 if (ifmgd
->associated
) {
1376 *smps_mode
= ifmgd
->ap_smps
;
1378 if (*smps_mode
== IEEE80211_SMPS_AUTOMATIC
) {
1379 if (ifmgd
->powersave
)
1380 *smps_mode
= IEEE80211_SMPS_DYNAMIC
;
1382 *smps_mode
= IEEE80211_SMPS_OFF
;
1391 /* must hold iflist_mtx */
1392 void ieee80211_recalc_smps(struct ieee80211_local
*local
)
1394 struct ieee80211_sub_if_data
*sdata
;
1395 enum ieee80211_smps_mode smps_mode
= IEEE80211_SMPS_OFF
;
1398 lockdep_assert_held(&local
->iflist_mtx
);
1401 * This function could be improved to handle multiple
1402 * interfaces better, but right now it makes any
1403 * non-station interfaces force SM PS to be turned
1404 * off. If there are multiple station interfaces it
1405 * could also use the best possible mode, e.g. if
1406 * one is in static and the other in dynamic then
1410 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1411 if (!ieee80211_sdata_running(sdata
))
1413 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1416 count
+= check_mgd_smps(&sdata
->u
.mgd
, &smps_mode
);
1419 smps_mode
= IEEE80211_SMPS_OFF
;
1424 if (smps_mode
== local
->smps_mode
)
1428 local
->smps_mode
= smps_mode
;
1429 /* changed flag is auto-detected for this */
1430 ieee80211_hw_config(local
, 0);
1433 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1437 for (i
= 0; i
< n_ids
; i
++)
1444 * ieee80211_ie_split - split an IE buffer according to ordering
1446 * @ies: the IE buffer
1447 * @ielen: the length of the IE buffer
1448 * @ids: an array with element IDs that are allowed before
1450 * @n_ids: the size of the element ID array
1451 * @offset: offset where to start splitting in the buffer
1453 * This function splits an IE buffer by updating the @offset
1454 * variable to point to the location where the buffer should be
1457 * It assumes that the given IE buffer is well-formed, this
1458 * has to be guaranteed by the caller!
1460 * It also assumes that the IEs in the buffer are ordered
1461 * correctly, if not the result of using this function will not
1462 * be ordered correctly either, i.e. it does no reordering.
1464 * The function returns the offset where the next part of the
1465 * buffer starts, which may be @ielen if the entire (remainder)
1466 * of the buffer should be used.
1468 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1469 const u8
*ids
, int n_ids
, size_t offset
)
1471 size_t pos
= offset
;
1473 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1474 pos
+= 2 + ies
[pos
+ 1];
1479 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1481 size_t pos
= offset
;
1483 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1484 pos
+= 2 + ies
[pos
+ 1];
1489 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1493 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1495 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1499 * Scale up threshold values before storing it, as the RSSI averaging
1500 * algorithm uses a scaled up value as well. Change this scaling
1501 * factor if the RSSI averaging algorithm changes.
1503 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1504 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1507 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1511 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1513 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1514 rssi_min_thold
> rssi_max_thold
);
1516 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1519 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1521 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1523 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1525 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1527 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1529 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1534 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1535 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1536 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1538 /* capability flags */
1539 tmp
= cpu_to_le16(cap
);
1540 memcpy(pos
, &tmp
, sizeof(u16
));
1543 /* AMPDU parameters */
1544 *pos
++ = ht_cap
->ampdu_factor
|
1545 (ht_cap
->ampdu_density
<<
1546 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1549 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1550 pos
+= sizeof(ht_cap
->mcs
);
1552 /* extended capabilities */
1553 pos
+= sizeof(__le16
);
1555 /* BF capabilities */
1556 pos
+= sizeof(__le32
);
1558 /* antenna selection */
1564 u8
*ieee80211_ie_build_ht_info(u8
*pos
,
1565 struct ieee80211_sta_ht_cap
*ht_cap
,
1566 struct ieee80211_channel
*channel
,
1567 enum nl80211_channel_type channel_type
)
1569 struct ieee80211_ht_info
*ht_info
;
1570 /* Build HT Information */
1571 *pos
++ = WLAN_EID_HT_INFORMATION
;
1572 *pos
++ = sizeof(struct ieee80211_ht_info
);
1573 ht_info
= (struct ieee80211_ht_info
*)pos
;
1574 ht_info
->control_chan
=
1575 ieee80211_frequency_to_channel(channel
->center_freq
);
1576 switch (channel_type
) {
1577 case NL80211_CHAN_HT40MINUS
:
1578 ht_info
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1580 case NL80211_CHAN_HT40PLUS
:
1581 ht_info
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1583 case NL80211_CHAN_HT20
:
1585 ht_info
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1588 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
)
1589 ht_info
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1592 * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
1593 * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
1595 ht_info
->operation_mode
= 0x0000;
1596 ht_info
->stbc_param
= 0x0000;
1598 /* It seems that Basic MCS set and Supported MCS set
1599 are identical for the first 10 bytes */
1600 memset(&ht_info
->basic_set
, 0, 16);
1601 memcpy(&ht_info
->basic_set
, &ht_cap
->mcs
, 10);
1603 return pos
+ sizeof(struct ieee80211_ht_info
);
1606 enum nl80211_channel_type
1607 ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info
*ht_info
)
1609 enum nl80211_channel_type channel_type
;
1612 return NL80211_CHAN_NO_HT
;
1614 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
1615 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1616 channel_type
= NL80211_CHAN_HT20
;
1618 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1619 channel_type
= NL80211_CHAN_HT40PLUS
;
1621 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1622 channel_type
= NL80211_CHAN_HT40MINUS
;
1625 channel_type
= NL80211_CHAN_NO_HT
;
1628 return channel_type
;
1631 int ieee80211_add_srates_ie(struct ieee80211_vif
*vif
, struct sk_buff
*skb
)
1633 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1634 struct ieee80211_local
*local
= sdata
->local
;
1635 struct ieee80211_supported_band
*sband
;
1639 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1640 rates
= sband
->n_bitrates
;
1644 if (skb_tailroom(skb
) < rates
+ 2)
1647 pos
= skb_put(skb
, rates
+ 2);
1648 *pos
++ = WLAN_EID_SUPP_RATES
;
1650 for (i
= 0; i
< rates
; i
++) {
1651 rate
= sband
->bitrates
[i
].bitrate
;
1652 *pos
++ = (u8
) (rate
/ 5);
1658 int ieee80211_add_ext_srates_ie(struct ieee80211_vif
*vif
, struct sk_buff
*skb
)
1660 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1661 struct ieee80211_local
*local
= sdata
->local
;
1662 struct ieee80211_supported_band
*sband
;
1664 u8 i
, exrates
, *pos
;
1666 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1667 exrates
= sband
->n_bitrates
;
1673 if (skb_tailroom(skb
) < exrates
+ 2)
1677 pos
= skb_put(skb
, exrates
+ 2);
1678 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1680 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
1681 rate
= sband
->bitrates
[i
].bitrate
;
1682 *pos
++ = (u8
) (rate
/ 5);