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/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/bitmap.h>
22 #include <net/net_namespace.h>
23 #include <net/cfg80211.h>
24 #include <net/rtnetlink.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
34 /* privid for wiphys to determine whether they belong to us or not */
35 void *mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
37 struct ieee80211_hw
*wiphy_to_ieee80211_hw(struct wiphy
*wiphy
)
39 struct ieee80211_local
*local
;
42 local
= wiphy_priv(wiphy
);
45 EXPORT_SYMBOL(wiphy_to_ieee80211_hw
);
47 u8
*ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
,
48 enum nl80211_iftype type
)
50 __le16 fc
= hdr
->frame_control
;
52 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
56 if (ieee80211_is_data(fc
)) {
57 if (len
< 24) /* drop incorrect hdr len (data) */
60 if (ieee80211_has_a4(fc
))
62 if (ieee80211_has_tods(fc
))
64 if (ieee80211_has_fromds(fc
))
70 if (ieee80211_is_mgmt(fc
)) {
71 if (len
< 24) /* drop incorrect hdr len (mgmt) */
76 if (ieee80211_is_ctl(fc
)) {
77 if(ieee80211_is_pspoll(fc
))
80 if (ieee80211_is_back_req(fc
)) {
82 case NL80211_IFTYPE_STATION
:
84 case NL80211_IFTYPE_AP
:
85 case NL80211_IFTYPE_AP_VLAN
:
88 break; /* fall through to the return */
96 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
98 struct sk_buff
*skb
= tx
->skb
;
99 struct ieee80211_hdr
*hdr
;
102 hdr
= (struct ieee80211_hdr
*) skb
->data
;
103 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
104 } while ((skb
= skb
->next
));
107 int ieee80211_frame_duration(struct ieee80211_local
*local
, size_t len
,
108 int rate
, int erp
, int short_preamble
)
112 /* calculate duration (in microseconds, rounded up to next higher
113 * integer if it includes a fractional microsecond) to send frame of
114 * len bytes (does not include FCS) at the given rate. Duration will
117 * rate is in 100 kbps, so divident is multiplied by 10 in the
118 * DIV_ROUND_UP() operations.
121 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
|| erp
) {
125 * N_DBPS = DATARATE x 4
126 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
127 * (16 = SIGNAL time, 6 = tail bits)
128 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
131 * 802.11a - 17.5.2: aSIFSTime = 16 usec
132 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
133 * signal ext = 6 usec
135 dur
= 16; /* SIFS + signal ext */
136 dur
+= 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
137 dur
+= 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
138 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
139 4 * rate
); /* T_SYM x N_SYM */
142 * 802.11b or 802.11g with 802.11b compatibility:
143 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
144 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
146 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
147 * aSIFSTime = 10 usec
148 * aPreambleLength = 144 usec or 72 usec with short preamble
149 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
151 dur
= 10; /* aSIFSTime = 10 usec */
152 dur
+= short_preamble
? (72 + 24) : (144 + 48);
154 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
160 /* Exported duration function for driver use */
161 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
162 struct ieee80211_vif
*vif
,
164 struct ieee80211_rate
*rate
)
166 struct ieee80211_local
*local
= hw_to_local(hw
);
167 struct ieee80211_sub_if_data
*sdata
;
170 bool short_preamble
= false;
174 sdata
= vif_to_sdata(vif
);
175 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
176 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
177 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
180 dur
= ieee80211_frame_duration(local
, frame_len
, rate
->bitrate
, erp
,
183 return cpu_to_le16(dur
);
185 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
187 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
188 struct ieee80211_vif
*vif
, size_t frame_len
,
189 const struct ieee80211_tx_info
*frame_txctl
)
191 struct ieee80211_local
*local
= hw_to_local(hw
);
192 struct ieee80211_rate
*rate
;
193 struct ieee80211_sub_if_data
*sdata
;
197 struct ieee80211_supported_band
*sband
;
199 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
201 short_preamble
= false;
203 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
207 sdata
= vif_to_sdata(vif
);
208 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
209 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
210 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
214 dur
= ieee80211_frame_duration(local
, 10, rate
->bitrate
,
215 erp
, short_preamble
);
216 /* Data frame duration */
217 dur
+= ieee80211_frame_duration(local
, frame_len
, rate
->bitrate
,
218 erp
, short_preamble
);
220 dur
+= ieee80211_frame_duration(local
, 10, rate
->bitrate
,
221 erp
, short_preamble
);
223 return cpu_to_le16(dur
);
225 EXPORT_SYMBOL(ieee80211_rts_duration
);
227 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
228 struct ieee80211_vif
*vif
,
230 const struct ieee80211_tx_info
*frame_txctl
)
232 struct ieee80211_local
*local
= hw_to_local(hw
);
233 struct ieee80211_rate
*rate
;
234 struct ieee80211_sub_if_data
*sdata
;
238 struct ieee80211_supported_band
*sband
;
240 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
242 short_preamble
= false;
244 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
247 sdata
= vif_to_sdata(vif
);
248 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
249 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
250 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
253 /* Data frame duration */
254 dur
= ieee80211_frame_duration(local
, frame_len
, rate
->bitrate
,
255 erp
, short_preamble
);
256 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
258 dur
+= ieee80211_frame_duration(local
, 10, rate
->bitrate
,
259 erp
, short_preamble
);
262 return cpu_to_le16(dur
);
264 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
266 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
267 enum queue_stop_reason reason
)
269 struct ieee80211_local
*local
= hw_to_local(hw
);
270 struct ieee80211_sub_if_data
*sdata
;
272 trace_wake_queue(local
, queue
, reason
);
274 if (WARN_ON(queue
>= hw
->queues
))
277 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
279 if (local
->queue_stop_reasons
[queue
] != 0)
280 /* someone still has this queue stopped */
283 if (skb_queue_empty(&local
->pending
[queue
])) {
285 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
286 if (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
288 netif_wake_subqueue(sdata
->dev
, queue
);
292 tasklet_schedule(&local
->tx_pending_tasklet
);
295 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
296 enum queue_stop_reason reason
)
298 struct ieee80211_local
*local
= hw_to_local(hw
);
301 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
302 __ieee80211_wake_queue(hw
, queue
, reason
);
303 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
306 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
308 ieee80211_wake_queue_by_reason(hw
, queue
,
309 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
311 EXPORT_SYMBOL(ieee80211_wake_queue
);
313 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
314 enum queue_stop_reason reason
)
316 struct ieee80211_local
*local
= hw_to_local(hw
);
317 struct ieee80211_sub_if_data
*sdata
;
319 trace_stop_queue(local
, queue
, reason
);
321 if (WARN_ON(queue
>= hw
->queues
))
324 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
327 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
328 netif_stop_subqueue(sdata
->dev
, queue
);
332 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
333 enum queue_stop_reason reason
)
335 struct ieee80211_local
*local
= hw_to_local(hw
);
338 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
339 __ieee80211_stop_queue(hw
, queue
, reason
);
340 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
343 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
345 ieee80211_stop_queue_by_reason(hw
, queue
,
346 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
348 EXPORT_SYMBOL(ieee80211_stop_queue
);
350 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
353 struct ieee80211_hw
*hw
= &local
->hw
;
355 int queue
= skb_get_queue_mapping(skb
);
356 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
358 if (WARN_ON(!info
->control
.vif
)) {
363 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
364 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
365 __skb_queue_tail(&local
->pending
[queue
], skb
);
366 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
367 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
370 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
371 struct sk_buff_head
*skbs
,
372 void (*fn
)(void *data
), void *data
)
374 struct ieee80211_hw
*hw
= &local
->hw
;
379 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
380 for (i
= 0; i
< hw
->queues
; i
++)
381 __ieee80211_stop_queue(hw
, i
,
382 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
384 while ((skb
= skb_dequeue(skbs
))) {
385 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
387 if (WARN_ON(!info
->control
.vif
)) {
392 queue
= skb_get_queue_mapping(skb
);
393 __skb_queue_tail(&local
->pending
[queue
], skb
);
399 for (i
= 0; i
< hw
->queues
; i
++)
400 __ieee80211_wake_queue(hw
, i
,
401 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
402 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
405 void ieee80211_add_pending_skbs(struct ieee80211_local
*local
,
406 struct sk_buff_head
*skbs
)
408 ieee80211_add_pending_skbs_fn(local
, skbs
, NULL
, NULL
);
411 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
412 enum queue_stop_reason reason
)
414 struct ieee80211_local
*local
= hw_to_local(hw
);
418 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
420 for (i
= 0; i
< hw
->queues
; i
++)
421 __ieee80211_stop_queue(hw
, i
, reason
);
423 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
426 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
428 ieee80211_stop_queues_by_reason(hw
,
429 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
431 EXPORT_SYMBOL(ieee80211_stop_queues
);
433 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
435 struct ieee80211_local
*local
= hw_to_local(hw
);
439 if (WARN_ON(queue
>= hw
->queues
))
442 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
443 ret
= !!local
->queue_stop_reasons
[queue
];
444 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
447 EXPORT_SYMBOL(ieee80211_queue_stopped
);
449 void ieee80211_wake_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_wake_queue(hw
, i
, reason
);
461 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
464 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
466 ieee80211_wake_queues_by_reason(hw
, IEEE80211_QUEUE_STOP_REASON_DRIVER
);
468 EXPORT_SYMBOL(ieee80211_wake_queues
);
470 void ieee80211_iterate_active_interfaces(
471 struct ieee80211_hw
*hw
,
472 void (*iterator
)(void *data
, u8
*mac
,
473 struct ieee80211_vif
*vif
),
476 struct ieee80211_local
*local
= hw_to_local(hw
);
477 struct ieee80211_sub_if_data
*sdata
;
479 mutex_lock(&local
->iflist_mtx
);
481 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
482 switch (sdata
->vif
.type
) {
483 case NL80211_IFTYPE_MONITOR
:
484 case NL80211_IFTYPE_AP_VLAN
:
489 if (ieee80211_sdata_running(sdata
))
490 iterator(data
, sdata
->vif
.addr
,
494 mutex_unlock(&local
->iflist_mtx
);
496 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
498 void ieee80211_iterate_active_interfaces_atomic(
499 struct ieee80211_hw
*hw
,
500 void (*iterator
)(void *data
, u8
*mac
,
501 struct ieee80211_vif
*vif
),
504 struct ieee80211_local
*local
= hw_to_local(hw
);
505 struct ieee80211_sub_if_data
*sdata
;
509 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
510 switch (sdata
->vif
.type
) {
511 case NL80211_IFTYPE_MONITOR
:
512 case NL80211_IFTYPE_AP_VLAN
:
517 if (ieee80211_sdata_running(sdata
))
518 iterator(data
, sdata
->vif
.addr
,
524 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
527 * Nothing should have been stuffed into the workqueue during
528 * the suspend->resume cycle. If this WARN is seen then there
529 * is a bug with either the driver suspend or something in
530 * mac80211 stuffing into the workqueue which we haven't yet
531 * cleared during mac80211's suspend cycle.
533 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
535 if (WARN(local
->suspended
&& !local
->resuming
,
536 "queueing ieee80211 work while going to suspend\n"))
542 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
544 struct ieee80211_local
*local
= hw_to_local(hw
);
546 if (!ieee80211_can_queue_work(local
))
549 queue_work(local
->workqueue
, work
);
551 EXPORT_SYMBOL(ieee80211_queue_work
);
553 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
554 struct delayed_work
*dwork
,
557 struct ieee80211_local
*local
= hw_to_local(hw
);
559 if (!ieee80211_can_queue_work(local
))
562 queue_delayed_work(local
->workqueue
, dwork
, delay
);
564 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
566 void ieee802_11_parse_elems(u8
*start
, size_t len
,
567 struct ieee802_11_elems
*elems
)
569 ieee802_11_parse_elems_crc(start
, len
, elems
, 0, 0);
572 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
)
574 struct ieee80211_local
*local
= sdata
->local
;
575 struct ieee80211_tx_queue_params qparam
;
580 if (!local
->ops
->conf_tx
)
583 memset(&qparam
, 0, sizeof(qparam
));
585 use_11b
= (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
586 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
588 for (queue
= 0; queue
< local_to_hw(local
)->queues
; queue
++) {
589 /* Set defaults according to 802.11-2007 Table 7-37 */
598 qparam
.cw_max
= aCWmax
;
599 qparam
.cw_min
= aCWmin
;
603 default: /* never happens but let's not leave undefined */
605 qparam
.cw_max
= aCWmax
;
606 qparam
.cw_min
= aCWmin
;
611 qparam
.cw_max
= aCWmin
;
612 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
614 qparam
.txop
= 6016/32;
616 qparam
.txop
= 3008/32;
620 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
621 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
623 qparam
.txop
= 3264/32;
625 qparam
.txop
= 1504/32;
630 qparam
.uapsd
= false;
632 sdata
->tx_conf
[queue
] = qparam
;
633 drv_conf_tx(local
, sdata
, queue
, &qparam
);
636 /* after reinitialize QoS TX queues setting to default,
637 * disable QoS at all */
639 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) {
640 sdata
->vif
.bss_conf
.qos
=
641 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
;
642 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
646 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
647 const size_t supp_rates_len
,
648 const u8
*supp_rates
)
650 struct ieee80211_local
*local
= sdata
->local
;
651 int i
, have_higher_than_11mbit
= 0;
653 /* cf. IEEE 802.11 9.2.12 */
654 for (i
= 0; i
< supp_rates_len
; i
++)
655 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
656 have_higher_than_11mbit
= 1;
658 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
659 have_higher_than_11mbit
)
660 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
662 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
664 ieee80211_set_wmm_default(sdata
);
667 u32
ieee80211_mandatory_rates(struct ieee80211_local
*local
,
668 enum ieee80211_band band
)
670 struct ieee80211_supported_band
*sband
;
671 struct ieee80211_rate
*bitrates
;
673 enum ieee80211_rate_flags mandatory_flag
;
676 sband
= local
->hw
.wiphy
->bands
[band
];
679 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
682 if (band
== IEEE80211_BAND_2GHZ
)
683 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
685 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
687 bitrates
= sband
->bitrates
;
689 for (i
= 0; i
< sband
->n_bitrates
; i
++)
690 if (bitrates
[i
].flags
& mandatory_flag
)
691 mandatory_rates
|= BIT(i
);
692 return mandatory_rates
;
695 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
696 u16 transaction
, u16 auth_alg
,
697 u8
*extra
, size_t extra_len
, const u8
*bssid
,
698 const u8
*key
, u8 key_len
, u8 key_idx
)
700 struct ieee80211_local
*local
= sdata
->local
;
702 struct ieee80211_mgmt
*mgmt
;
705 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
706 sizeof(*mgmt
) + 6 + extra_len
);
710 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
712 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
713 memset(mgmt
, 0, 24 + 6);
714 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
715 IEEE80211_STYPE_AUTH
);
716 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
717 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
718 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
719 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
720 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
721 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
723 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
725 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
726 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
727 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
731 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
732 ieee80211_tx_skb(sdata
, skb
);
735 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
736 const u8
*ie
, size_t ie_len
,
737 enum ieee80211_band band
, u32 rate_mask
,
740 struct ieee80211_supported_band
*sband
;
742 size_t offset
= 0, noffset
;
743 int supp_rates_len
, i
;
748 sband
= local
->hw
.wiphy
->bands
[band
];
753 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
754 if ((BIT(i
) & rate_mask
) == 0)
755 continue; /* skip rate */
756 rates
[num_rates
++] = (u8
) (sband
->bitrates
[i
].bitrate
/ 5);
759 supp_rates_len
= min_t(int, num_rates
, 8);
761 *pos
++ = WLAN_EID_SUPP_RATES
;
762 *pos
++ = supp_rates_len
;
763 memcpy(pos
, rates
, supp_rates_len
);
764 pos
+= supp_rates_len
;
766 /* insert "request information" if in custom IEs */
768 static const u8 before_extrates
[] = {
773 noffset
= ieee80211_ie_split(ie
, ie_len
,
775 ARRAY_SIZE(before_extrates
),
777 memcpy(pos
, ie
+ offset
, noffset
- offset
);
778 pos
+= noffset
- offset
;
782 ext_rates_len
= num_rates
- supp_rates_len
;
783 if (ext_rates_len
> 0) {
784 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
785 *pos
++ = ext_rates_len
;
786 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
787 pos
+= ext_rates_len
;
790 if (channel
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
791 *pos
++ = WLAN_EID_DS_PARAMS
;
796 /* insert custom IEs that go before HT */
798 static const u8 before_ht
[] = {
802 WLAN_EID_EXT_SUPP_RATES
,
804 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
806 noffset
= ieee80211_ie_split(ie
, ie_len
,
807 before_ht
, ARRAY_SIZE(before_ht
),
809 memcpy(pos
, ie
+ offset
, noffset
- offset
);
810 pos
+= noffset
- offset
;
814 if (sband
->ht_cap
.ht_supported
)
815 pos
= ieee80211_ie_build_ht_cap(pos
, sband
, sband
->ht_cap
.cap
);
818 * If adding more here, adjust code in main.c
819 * that calculates local->scan_ies_len.
822 /* add any remaining custom IEs */
825 memcpy(pos
, ie
+ offset
, noffset
- offset
);
826 pos
+= noffset
- offset
;
832 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
833 u8
*dst
, u32 ratemask
,
834 const u8
*ssid
, size_t ssid_len
,
835 const u8
*ie
, size_t ie_len
,
838 struct ieee80211_local
*local
= sdata
->local
;
840 struct ieee80211_mgmt
*mgmt
;
845 /* FIXME: come up with a proper value */
846 buf
= kmalloc(200 + ie_len
, GFP_KERNEL
);
851 * Do not send DS Channel parameter for directed probe requests
852 * in order to maximize the chance that we get a response. Some
853 * badly-behaved APs don't respond when this parameter is included.
858 chan
= ieee80211_frequency_to_channel(
859 local
->hw
.conf
.channel
->center_freq
);
861 buf_len
= ieee80211_build_preq_ies(local
, buf
, ie
, ie_len
,
862 local
->hw
.conf
.channel
->band
,
865 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
870 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
871 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
872 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
875 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
881 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
882 const u8
*ssid
, size_t ssid_len
,
883 const u8
*ie
, size_t ie_len
,
884 u32 ratemask
, bool directed
, bool no_cck
)
888 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, ssid
, ssid_len
,
889 ie
, ie_len
, directed
);
892 IEEE80211_SKB_CB(skb
)->flags
|=
893 IEEE80211_TX_CTL_NO_CCK_RATE
;
894 ieee80211_tx_skb(sdata
, skb
);
898 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
899 struct ieee802_11_elems
*elems
,
900 enum ieee80211_band band
)
902 struct ieee80211_supported_band
*sband
;
903 struct ieee80211_rate
*bitrates
;
907 sband
= local
->hw
.wiphy
->bands
[band
];
911 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
914 bitrates
= sband
->bitrates
;
915 num_rates
= sband
->n_bitrates
;
917 for (i
= 0; i
< elems
->supp_rates_len
+
918 elems
->ext_supp_rates_len
; i
++) {
921 if (i
< elems
->supp_rates_len
)
922 rate
= elems
->supp_rates
[i
];
923 else if (elems
->ext_supp_rates
)
924 rate
= elems
->ext_supp_rates
925 [i
- elems
->supp_rates_len
];
926 own_rate
= 5 * (rate
& 0x7f);
927 for (j
= 0; j
< num_rates
; j
++)
928 if (bitrates
[j
].bitrate
== own_rate
)
929 supp_rates
|= BIT(j
);
934 void ieee80211_stop_device(struct ieee80211_local
*local
)
936 ieee80211_led_radio(local
, false);
937 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
939 cancel_work_sync(&local
->reconfig_filter
);
941 flush_workqueue(local
->workqueue
);
945 int ieee80211_reconfig(struct ieee80211_local
*local
)
947 struct ieee80211_hw
*hw
= &local
->hw
;
948 struct ieee80211_sub_if_data
*sdata
;
949 struct sta_info
*sta
;
953 if (local
->suspended
)
954 local
->resuming
= true;
957 local
->wowlan
= false;
958 res
= drv_resume(local
);
960 local
->resuming
= false;
967 * res is 1, which means the driver requested
968 * to go through a regular reset on wakeup.
973 /* setup fragmentation threshold */
974 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
976 /* setup RTS threshold */
977 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
979 /* reset coverage class */
980 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
982 /* everything else happens only if HW was up & running */
983 if (!local
->open_count
)
987 * Upon resume hardware can sometimes be goofy due to
988 * various platform / driver / bus issues, so restarting
989 * the device may at times not work immediately. Propagate
992 res
= drv_start(local
);
994 WARN(local
->suspended
, "Hardware became unavailable "
995 "upon resume. This could be a software issue "
996 "prior to suspend or a hardware issue.\n");
1000 ieee80211_led_radio(local
, true);
1001 ieee80211_mod_tpt_led_trig(local
,
1002 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1004 /* add interfaces */
1005 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1006 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1007 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1008 ieee80211_sdata_running(sdata
))
1009 res
= drv_add_interface(local
, &sdata
->vif
);
1013 mutex_lock(&local
->sta_mtx
);
1014 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1015 if (sta
->uploaded
) {
1017 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1018 sdata
= container_of(sdata
->bss
,
1019 struct ieee80211_sub_if_data
,
1022 memset(&sta
->sta
.drv_priv
, 0, hw
->sta_data_size
);
1023 WARN_ON(drv_sta_add(local
, sdata
, &sta
->sta
));
1026 mutex_unlock(&local
->sta_mtx
);
1028 /* reconfigure tx conf */
1029 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1030 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1031 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1032 !ieee80211_sdata_running(sdata
))
1035 for (i
= 0; i
< hw
->queues
; i
++)
1036 drv_conf_tx(local
, sdata
, i
, &sdata
->tx_conf
[i
]);
1039 /* reconfigure hardware */
1040 ieee80211_hw_config(local
, ~0);
1042 ieee80211_configure_filter(local
);
1044 /* Finally also reconfigure all the BSS information */
1045 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1048 if (!ieee80211_sdata_running(sdata
))
1051 /* common change flags for all interface types */
1052 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1053 BSS_CHANGED_ERP_PREAMBLE
|
1054 BSS_CHANGED_ERP_SLOT
|
1056 BSS_CHANGED_BASIC_RATES
|
1057 BSS_CHANGED_BEACON_INT
|
1062 switch (sdata
->vif
.type
) {
1063 case NL80211_IFTYPE_STATION
:
1064 changed
|= BSS_CHANGED_ASSOC
;
1065 mutex_lock(&sdata
->u
.mgd
.mtx
);
1066 ieee80211_bss_info_change_notify(sdata
, changed
);
1067 mutex_unlock(&sdata
->u
.mgd
.mtx
);
1069 case NL80211_IFTYPE_ADHOC
:
1070 changed
|= BSS_CHANGED_IBSS
;
1072 case NL80211_IFTYPE_AP
:
1073 changed
|= BSS_CHANGED_SSID
;
1075 case NL80211_IFTYPE_MESH_POINT
:
1076 changed
|= BSS_CHANGED_BEACON
|
1077 BSS_CHANGED_BEACON_ENABLED
;
1078 ieee80211_bss_info_change_notify(sdata
, changed
);
1080 case NL80211_IFTYPE_WDS
:
1082 case NL80211_IFTYPE_AP_VLAN
:
1083 case NL80211_IFTYPE_MONITOR
:
1084 /* ignore virtual */
1086 case NL80211_IFTYPE_UNSPECIFIED
:
1087 case NUM_NL80211_IFTYPES
:
1088 case NL80211_IFTYPE_P2P_CLIENT
:
1089 case NL80211_IFTYPE_P2P_GO
:
1096 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1097 * sessions can be established after a resume.
1099 * Also tear down aggregation sessions since reconfiguring
1100 * them in a hardware restart scenario is not easily done
1101 * right now, and the hardware will have lost information
1102 * about the sessions, but we and the AP still think they
1103 * are active. This is really a workaround though.
1105 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1106 mutex_lock(&local
->sta_mtx
);
1108 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1109 ieee80211_sta_tear_down_BA_sessions(sta
, true);
1110 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1113 mutex_unlock(&local
->sta_mtx
);
1117 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1118 if (ieee80211_sdata_running(sdata
))
1119 ieee80211_enable_keys(sdata
);
1122 ieee80211_wake_queues_by_reason(hw
,
1123 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1126 * If this is for hw restart things are still running.
1127 * We may want to change that later, however.
1129 if (!local
->suspended
)
1133 /* first set suspended false, then resuming */
1134 local
->suspended
= false;
1136 local
->resuming
= false;
1138 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1139 switch(sdata
->vif
.type
) {
1140 case NL80211_IFTYPE_STATION
:
1141 ieee80211_sta_restart(sdata
);
1143 case NL80211_IFTYPE_ADHOC
:
1144 ieee80211_ibss_restart(sdata
);
1146 case NL80211_IFTYPE_MESH_POINT
:
1147 ieee80211_mesh_restart(sdata
);
1154 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1156 mutex_lock(&local
->sta_mtx
);
1157 list_for_each_entry(sta
, &local
->sta_list
, list
)
1158 mesh_plink_restart(sta
);
1159 mutex_unlock(&local
->sta_mtx
);
1166 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1168 struct ieee80211_sub_if_data
*sdata
;
1169 struct ieee80211_local
*local
;
1170 struct ieee80211_key
*key
;
1175 sdata
= vif_to_sdata(vif
);
1176 local
= sdata
->local
;
1178 if (WARN_ON(!local
->resuming
))
1181 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1184 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1186 mutex_lock(&local
->key_mtx
);
1187 list_for_each_entry(key
, &sdata
->key_list
, list
)
1188 key
->flags
|= KEY_FLAG_TAINTED
;
1189 mutex_unlock(&local
->key_mtx
);
1191 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1193 static int check_mgd_smps(struct ieee80211_if_managed
*ifmgd
,
1194 enum ieee80211_smps_mode
*smps_mode
)
1196 if (ifmgd
->associated
) {
1197 *smps_mode
= ifmgd
->ap_smps
;
1199 if (*smps_mode
== IEEE80211_SMPS_AUTOMATIC
) {
1200 if (ifmgd
->powersave
)
1201 *smps_mode
= IEEE80211_SMPS_DYNAMIC
;
1203 *smps_mode
= IEEE80211_SMPS_OFF
;
1212 /* must hold iflist_mtx */
1213 void ieee80211_recalc_smps(struct ieee80211_local
*local
)
1215 struct ieee80211_sub_if_data
*sdata
;
1216 enum ieee80211_smps_mode smps_mode
= IEEE80211_SMPS_OFF
;
1219 lockdep_assert_held(&local
->iflist_mtx
);
1222 * This function could be improved to handle multiple
1223 * interfaces better, but right now it makes any
1224 * non-station interfaces force SM PS to be turned
1225 * off. If there are multiple station interfaces it
1226 * could also use the best possible mode, e.g. if
1227 * one is in static and the other in dynamic then
1231 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1232 if (!ieee80211_sdata_running(sdata
))
1234 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1237 count
+= check_mgd_smps(&sdata
->u
.mgd
, &smps_mode
);
1240 smps_mode
= IEEE80211_SMPS_OFF
;
1245 if (smps_mode
== local
->smps_mode
)
1249 local
->smps_mode
= smps_mode
;
1250 /* changed flag is auto-detected for this */
1251 ieee80211_hw_config(local
, 0);
1254 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1258 for (i
= 0; i
< n_ids
; i
++)
1265 * ieee80211_ie_split - split an IE buffer according to ordering
1267 * @ies: the IE buffer
1268 * @ielen: the length of the IE buffer
1269 * @ids: an array with element IDs that are allowed before
1271 * @n_ids: the size of the element ID array
1272 * @offset: offset where to start splitting in the buffer
1274 * This function splits an IE buffer by updating the @offset
1275 * variable to point to the location where the buffer should be
1278 * It assumes that the given IE buffer is well-formed, this
1279 * has to be guaranteed by the caller!
1281 * It also assumes that the IEs in the buffer are ordered
1282 * correctly, if not the result of using this function will not
1283 * be ordered correctly either, i.e. it does no reordering.
1285 * The function returns the offset where the next part of the
1286 * buffer starts, which may be @ielen if the entire (remainder)
1287 * of the buffer should be used.
1289 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1290 const u8
*ids
, int n_ids
, size_t offset
)
1292 size_t pos
= offset
;
1294 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1295 pos
+= 2 + ies
[pos
+ 1];
1300 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1302 size_t pos
= offset
;
1304 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1305 pos
+= 2 + ies
[pos
+ 1];
1310 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1314 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1316 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1320 * Scale up threshold values before storing it, as the RSSI averaging
1321 * algorithm uses a scaled up value as well. Change this scaling
1322 * factor if the RSSI averaging algorithm changes.
1324 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1325 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1328 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1332 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1334 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1335 rssi_min_thold
> rssi_max_thold
);
1337 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1340 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1342 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1344 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1346 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1348 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1350 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_supported_band
*sband
,
1355 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1356 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1357 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1359 /* capability flags */
1360 tmp
= cpu_to_le16(cap
);
1361 memcpy(pos
, &tmp
, sizeof(u16
));
1364 /* AMPDU parameters */
1365 *pos
++ = sband
->ht_cap
.ampdu_factor
|
1366 (sband
->ht_cap
.ampdu_density
<<
1367 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1370 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
1371 pos
+= sizeof(sband
->ht_cap
.mcs
);
1373 /* extended capabilities */
1374 pos
+= sizeof(__le16
);
1376 /* BF capabilities */
1377 pos
+= sizeof(__le32
);
1379 /* antenna selection */
1385 u8
*ieee80211_ie_build_ht_info(u8
*pos
,
1386 struct ieee80211_sta_ht_cap
*ht_cap
,
1387 struct ieee80211_channel
*channel
,
1388 enum nl80211_channel_type channel_type
)
1390 struct ieee80211_ht_info
*ht_info
;
1391 /* Build HT Information */
1392 *pos
++ = WLAN_EID_HT_INFORMATION
;
1393 *pos
++ = sizeof(struct ieee80211_ht_info
);
1394 ht_info
= (struct ieee80211_ht_info
*)pos
;
1395 ht_info
->control_chan
=
1396 ieee80211_frequency_to_channel(channel
->center_freq
);
1397 switch (channel_type
) {
1398 case NL80211_CHAN_HT40MINUS
:
1399 ht_info
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1401 case NL80211_CHAN_HT40PLUS
:
1402 ht_info
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1404 case NL80211_CHAN_HT20
:
1406 ht_info
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1409 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
)
1410 ht_info
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1411 ht_info
->operation_mode
= 0x0000;
1412 ht_info
->stbc_param
= 0x0000;
1414 /* It seems that Basic MCS set and Supported MCS set
1415 are identical for the first 10 bytes */
1416 memset(&ht_info
->basic_set
, 0, 16);
1417 memcpy(&ht_info
->basic_set
, &ht_cap
->mcs
, 10);
1419 return pos
+ sizeof(struct ieee80211_ht_info
);
1422 enum nl80211_channel_type
1423 ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info
*ht_info
)
1425 enum nl80211_channel_type channel_type
;
1428 return NL80211_CHAN_NO_HT
;
1430 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
1431 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1432 channel_type
= NL80211_CHAN_HT20
;
1434 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1435 channel_type
= NL80211_CHAN_HT40PLUS
;
1437 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1438 channel_type
= NL80211_CHAN_HT40MINUS
;
1441 channel_type
= NL80211_CHAN_NO_HT
;
1444 return channel_type
;
1447 int ieee80211_add_srates_ie(struct ieee80211_vif
*vif
, struct sk_buff
*skb
)
1449 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1450 struct ieee80211_local
*local
= sdata
->local
;
1451 struct ieee80211_supported_band
*sband
;
1455 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1456 rates
= sband
->n_bitrates
;
1460 if (skb_tailroom(skb
) < rates
+ 2)
1463 pos
= skb_put(skb
, rates
+ 2);
1464 *pos
++ = WLAN_EID_SUPP_RATES
;
1466 for (i
= 0; i
< rates
; i
++) {
1467 rate
= sband
->bitrates
[i
].bitrate
;
1468 *pos
++ = (u8
) (rate
/ 5);
1474 int ieee80211_add_ext_srates_ie(struct ieee80211_vif
*vif
, struct sk_buff
*skb
)
1476 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1477 struct ieee80211_local
*local
= sdata
->local
;
1478 struct ieee80211_supported_band
*sband
;
1480 u8 i
, exrates
, *pos
;
1482 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1483 exrates
= sband
->n_bitrates
;
1489 if (skb_tailroom(skb
) < exrates
+ 2)
1493 pos
= skb_put(skb
, exrates
+ 2);
1494 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1496 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
1497 rate
= sband
->bitrates
[i
].bitrate
;
1498 *pos
++ = (u8
) (rate
/ 5);