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 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
282 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
284 if (local
->queue_stop_reasons
[queue
] != 0)
285 /* someone still has this queue stopped */
288 if (skb_queue_empty(&local
->pending
[queue
])) {
290 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
291 if (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
293 netif_wake_subqueue(sdata
->dev
, queue
);
297 tasklet_schedule(&local
->tx_pending_tasklet
);
300 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
301 enum queue_stop_reason reason
)
303 struct ieee80211_local
*local
= hw_to_local(hw
);
306 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
307 __ieee80211_wake_queue(hw
, queue
, reason
);
308 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
311 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
313 ieee80211_wake_queue_by_reason(hw
, queue
,
314 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
316 EXPORT_SYMBOL(ieee80211_wake_queue
);
318 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
319 enum queue_stop_reason reason
)
321 struct ieee80211_local
*local
= hw_to_local(hw
);
322 struct ieee80211_sub_if_data
*sdata
;
324 trace_stop_queue(local
, queue
, reason
);
326 if (WARN_ON(queue
>= hw
->queues
))
329 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
332 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
335 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
336 netif_stop_subqueue(sdata
->dev
, queue
);
340 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
341 enum queue_stop_reason reason
)
343 struct ieee80211_local
*local
= hw_to_local(hw
);
346 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
347 __ieee80211_stop_queue(hw
, queue
, reason
);
348 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
351 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
353 ieee80211_stop_queue_by_reason(hw
, queue
,
354 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
356 EXPORT_SYMBOL(ieee80211_stop_queue
);
358 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
361 struct ieee80211_hw
*hw
= &local
->hw
;
363 int queue
= skb_get_queue_mapping(skb
);
364 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
366 if (WARN_ON(!info
->control
.vif
)) {
371 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
372 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
373 __skb_queue_tail(&local
->pending
[queue
], skb
);
374 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
375 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
378 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
379 struct sk_buff_head
*skbs
,
380 void (*fn
)(void *data
), void *data
)
382 struct ieee80211_hw
*hw
= &local
->hw
;
387 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
388 while ((skb
= skb_dequeue(skbs
))) {
389 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
391 if (WARN_ON(!info
->control
.vif
)) {
396 queue
= skb_get_queue_mapping(skb
);
398 __ieee80211_stop_queue(hw
, queue
,
399 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
401 __skb_queue_tail(&local
->pending
[queue
], skb
);
407 for (i
= 0; i
< hw
->queues
; i
++)
408 __ieee80211_wake_queue(hw
, i
,
409 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
410 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
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;
575 DECLARE_BITMAP(seen_elems
, 256);
577 bitmap_zero(seen_elems
, 256);
578 memset(elems
, 0, sizeof(*elems
));
579 elems
->ie_start
= start
;
580 elems
->total_len
= len
;
584 bool elem_parse_failed
;
591 elems
->parse_error
= true;
595 if (id
!= WLAN_EID_VENDOR_SPECIFIC
&&
596 id
!= WLAN_EID_QUIET
&&
597 test_bit(id
, seen_elems
)) {
598 elems
->parse_error
= true;
604 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
605 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
607 elem_parse_failed
= false;
612 elems
->ssid_len
= elen
;
614 case WLAN_EID_SUPP_RATES
:
615 elems
->supp_rates
= pos
;
616 elems
->supp_rates_len
= elen
;
618 case WLAN_EID_FH_PARAMS
:
619 elems
->fh_params
= pos
;
620 elems
->fh_params_len
= elen
;
622 case WLAN_EID_DS_PARAMS
:
623 elems
->ds_params
= pos
;
624 elems
->ds_params_len
= elen
;
626 case WLAN_EID_CF_PARAMS
:
627 elems
->cf_params
= pos
;
628 elems
->cf_params_len
= elen
;
631 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
632 elems
->tim
= (void *)pos
;
633 elems
->tim_len
= elen
;
635 elem_parse_failed
= true;
637 case WLAN_EID_IBSS_PARAMS
:
638 elems
->ibss_params
= pos
;
639 elems
->ibss_params_len
= elen
;
641 case WLAN_EID_CHALLENGE
:
642 elems
->challenge
= pos
;
643 elems
->challenge_len
= elen
;
645 case WLAN_EID_VENDOR_SPECIFIC
:
646 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
648 /* Microsoft OUI (00:50:F2) */
651 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
654 /* OUI Type 1 - WPA IE */
656 elems
->wpa_len
= elen
;
657 } else if (elen
>= 5 && pos
[3] == 2) {
658 /* OUI Type 2 - WMM IE */
660 elems
->wmm_info
= pos
;
661 elems
->wmm_info_len
= elen
;
662 } else if (pos
[4] == 1) {
663 elems
->wmm_param
= pos
;
664 elems
->wmm_param_len
= elen
;
671 elems
->rsn_len
= elen
;
673 case WLAN_EID_ERP_INFO
:
674 elems
->erp_info
= pos
;
675 elems
->erp_info_len
= elen
;
677 case WLAN_EID_EXT_SUPP_RATES
:
678 elems
->ext_supp_rates
= pos
;
679 elems
->ext_supp_rates_len
= elen
;
681 case WLAN_EID_HT_CAPABILITY
:
682 if (elen
>= sizeof(struct ieee80211_ht_cap
))
683 elems
->ht_cap_elem
= (void *)pos
;
685 elem_parse_failed
= true;
687 case WLAN_EID_HT_OPERATION
:
688 if (elen
>= sizeof(struct ieee80211_ht_operation
))
689 elems
->ht_operation
= (void *)pos
;
691 elem_parse_failed
= true;
693 case WLAN_EID_MESH_ID
:
694 elems
->mesh_id
= pos
;
695 elems
->mesh_id_len
= elen
;
697 case WLAN_EID_MESH_CONFIG
:
698 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
699 elems
->mesh_config
= (void *)pos
;
701 elem_parse_failed
= true;
703 case WLAN_EID_PEER_MGMT
:
704 elems
->peering
= pos
;
705 elems
->peering_len
= elen
;
709 elems
->preq_len
= elen
;
713 elems
->prep_len
= elen
;
717 elems
->perr_len
= elen
;
720 if (elen
>= sizeof(struct ieee80211_rann_ie
))
721 elems
->rann
= (void *)pos
;
723 elem_parse_failed
= true;
725 case WLAN_EID_CHANNEL_SWITCH
:
726 elems
->ch_switch_elem
= pos
;
727 elems
->ch_switch_elem_len
= elen
;
730 if (!elems
->quiet_elem
) {
731 elems
->quiet_elem
= pos
;
732 elems
->quiet_elem_len
= elen
;
734 elems
->num_of_quiet_elem
++;
736 case WLAN_EID_COUNTRY
:
737 elems
->country_elem
= pos
;
738 elems
->country_elem_len
= elen
;
740 case WLAN_EID_PWR_CONSTRAINT
:
741 elems
->pwr_constr_elem
= pos
;
742 elems
->pwr_constr_elem_len
= elen
;
744 case WLAN_EID_TIMEOUT_INTERVAL
:
745 elems
->timeout_int
= pos
;
746 elems
->timeout_int_len
= elen
;
752 if (elem_parse_failed
)
753 elems
->parse_error
= true;
755 set_bit(id
, seen_elems
);
762 elems
->parse_error
= true;
767 void ieee802_11_parse_elems(u8
*start
, size_t len
,
768 struct ieee802_11_elems
*elems
)
770 ieee802_11_parse_elems_crc(start
, len
, elems
, 0, 0);
773 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
776 struct ieee80211_local
*local
= sdata
->local
;
777 struct ieee80211_tx_queue_params qparam
;
782 if (!local
->ops
->conf_tx
)
785 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
788 memset(&qparam
, 0, sizeof(qparam
));
790 use_11b
= (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
791 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
793 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
794 /* Set defaults according to 802.11-2007 Table 7-37 */
802 case IEEE80211_AC_BK
:
803 qparam
.cw_max
= aCWmax
;
804 qparam
.cw_min
= aCWmin
;
808 default: /* never happens but let's not leave undefined */
809 case IEEE80211_AC_BE
:
810 qparam
.cw_max
= aCWmax
;
811 qparam
.cw_min
= aCWmin
;
815 case IEEE80211_AC_VI
:
816 qparam
.cw_max
= aCWmin
;
817 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
819 qparam
.txop
= 6016/32;
821 qparam
.txop
= 3008/32;
824 case IEEE80211_AC_VO
:
825 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
826 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
828 qparam
.txop
= 3264/32;
830 qparam
.txop
= 1504/32;
835 qparam
.uapsd
= false;
837 sdata
->tx_conf
[ac
] = qparam
;
838 drv_conf_tx(local
, sdata
, ac
, &qparam
);
841 /* after reinitialize QoS TX queues setting to default,
842 * disable QoS at all */
844 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) {
845 sdata
->vif
.bss_conf
.qos
=
846 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
;
848 ieee80211_bss_info_change_notify(sdata
,
853 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
854 const size_t supp_rates_len
,
855 const u8
*supp_rates
)
857 struct ieee80211_local
*local
= sdata
->local
;
858 int i
, have_higher_than_11mbit
= 0;
860 /* cf. IEEE 802.11 9.2.12 */
861 for (i
= 0; i
< supp_rates_len
; i
++)
862 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
863 have_higher_than_11mbit
= 1;
865 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
866 have_higher_than_11mbit
)
867 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
869 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
871 ieee80211_set_wmm_default(sdata
, true);
874 u32
ieee80211_mandatory_rates(struct ieee80211_local
*local
,
875 enum ieee80211_band band
)
877 struct ieee80211_supported_band
*sband
;
878 struct ieee80211_rate
*bitrates
;
880 enum ieee80211_rate_flags mandatory_flag
;
883 sband
= local
->hw
.wiphy
->bands
[band
];
886 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
889 if (band
== IEEE80211_BAND_2GHZ
)
890 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
892 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
894 bitrates
= sband
->bitrates
;
896 for (i
= 0; i
< sband
->n_bitrates
; i
++)
897 if (bitrates
[i
].flags
& mandatory_flag
)
898 mandatory_rates
|= BIT(i
);
899 return mandatory_rates
;
902 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
903 u16 transaction
, u16 auth_alg
,
904 u8
*extra
, size_t extra_len
, const u8
*da
,
905 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
)
907 struct ieee80211_local
*local
= sdata
->local
;
909 struct ieee80211_mgmt
*mgmt
;
912 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
913 sizeof(*mgmt
) + 6 + extra_len
);
917 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
919 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
920 memset(mgmt
, 0, 24 + 6);
921 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
922 IEEE80211_STYPE_AUTH
);
923 memcpy(mgmt
->da
, da
, ETH_ALEN
);
924 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
925 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
926 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
927 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
928 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
930 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
932 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
933 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
934 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
938 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
939 ieee80211_tx_skb(sdata
, skb
);
942 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
943 const u8
*ie
, size_t ie_len
,
944 enum ieee80211_band band
, u32 rate_mask
,
947 struct ieee80211_supported_band
*sband
;
949 size_t offset
= 0, noffset
;
950 int supp_rates_len
, i
;
955 sband
= local
->hw
.wiphy
->bands
[band
];
960 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
961 if ((BIT(i
) & rate_mask
) == 0)
962 continue; /* skip rate */
963 rates
[num_rates
++] = (u8
) (sband
->bitrates
[i
].bitrate
/ 5);
966 supp_rates_len
= min_t(int, num_rates
, 8);
968 *pos
++ = WLAN_EID_SUPP_RATES
;
969 *pos
++ = supp_rates_len
;
970 memcpy(pos
, rates
, supp_rates_len
);
971 pos
+= supp_rates_len
;
973 /* insert "request information" if in custom IEs */
975 static const u8 before_extrates
[] = {
980 noffset
= ieee80211_ie_split(ie
, ie_len
,
982 ARRAY_SIZE(before_extrates
),
984 memcpy(pos
, ie
+ offset
, noffset
- offset
);
985 pos
+= noffset
- offset
;
989 ext_rates_len
= num_rates
- supp_rates_len
;
990 if (ext_rates_len
> 0) {
991 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
992 *pos
++ = ext_rates_len
;
993 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
994 pos
+= ext_rates_len
;
997 if (channel
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
998 *pos
++ = WLAN_EID_DS_PARAMS
;
1003 /* insert custom IEs that go before HT */
1005 static const u8 before_ht
[] = {
1007 WLAN_EID_SUPP_RATES
,
1009 WLAN_EID_EXT_SUPP_RATES
,
1011 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1013 noffset
= ieee80211_ie_split(ie
, ie_len
,
1014 before_ht
, ARRAY_SIZE(before_ht
),
1016 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1017 pos
+= noffset
- offset
;
1021 if (sband
->ht_cap
.ht_supported
)
1022 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1026 * If adding more here, adjust code in main.c
1027 * that calculates local->scan_ies_len.
1030 /* add any remaining custom IEs */
1033 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1034 pos
+= noffset
- offset
;
1037 return pos
- buffer
;
1040 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1041 u8
*dst
, u32 ratemask
,
1042 const u8
*ssid
, size_t ssid_len
,
1043 const u8
*ie
, size_t ie_len
,
1046 struct ieee80211_local
*local
= sdata
->local
;
1047 struct sk_buff
*skb
;
1048 struct ieee80211_mgmt
*mgmt
;
1053 /* FIXME: come up with a proper value */
1054 buf
= kmalloc(200 + ie_len
, GFP_KERNEL
);
1059 * Do not send DS Channel parameter for directed probe requests
1060 * in order to maximize the chance that we get a response. Some
1061 * badly-behaved APs don't respond when this parameter is included.
1066 chan
= ieee80211_frequency_to_channel(
1067 local
->hw
.conf
.channel
->center_freq
);
1069 buf_len
= ieee80211_build_preq_ies(local
, buf
, ie
, ie_len
,
1070 local
->hw
.conf
.channel
->band
,
1073 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1080 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1081 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1082 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1085 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1093 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1094 const u8
*ssid
, size_t ssid_len
,
1095 const u8
*ie
, size_t ie_len
,
1096 u32 ratemask
, bool directed
, bool no_cck
)
1098 struct sk_buff
*skb
;
1100 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, ssid
, ssid_len
,
1101 ie
, ie_len
, directed
);
1104 IEEE80211_SKB_CB(skb
)->flags
|=
1105 IEEE80211_TX_CTL_NO_CCK_RATE
;
1106 ieee80211_tx_skb(sdata
, skb
);
1110 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
1111 struct ieee802_11_elems
*elems
,
1112 enum ieee80211_band band
)
1114 struct ieee80211_supported_band
*sband
;
1115 struct ieee80211_rate
*bitrates
;
1119 sband
= local
->hw
.wiphy
->bands
[band
];
1123 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1126 bitrates
= sband
->bitrates
;
1127 num_rates
= sband
->n_bitrates
;
1129 for (i
= 0; i
< elems
->supp_rates_len
+
1130 elems
->ext_supp_rates_len
; i
++) {
1133 if (i
< elems
->supp_rates_len
)
1134 rate
= elems
->supp_rates
[i
];
1135 else if (elems
->ext_supp_rates
)
1136 rate
= elems
->ext_supp_rates
1137 [i
- elems
->supp_rates_len
];
1138 own_rate
= 5 * (rate
& 0x7f);
1139 for (j
= 0; j
< num_rates
; j
++)
1140 if (bitrates
[j
].bitrate
== own_rate
)
1141 supp_rates
|= BIT(j
);
1146 void ieee80211_stop_device(struct ieee80211_local
*local
)
1148 ieee80211_led_radio(local
, false);
1149 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1151 cancel_work_sync(&local
->reconfig_filter
);
1153 flush_workqueue(local
->workqueue
);
1157 int ieee80211_reconfig(struct ieee80211_local
*local
)
1159 struct ieee80211_hw
*hw
= &local
->hw
;
1160 struct ieee80211_sub_if_data
*sdata
;
1161 struct sta_info
*sta
;
1165 if (local
->suspended
)
1166 local
->resuming
= true;
1168 if (local
->wowlan
) {
1169 local
->wowlan
= false;
1170 res
= drv_resume(local
);
1172 local
->resuming
= false;
1179 * res is 1, which means the driver requested
1180 * to go through a regular reset on wakeup.
1184 /* everything else happens only if HW was up & running */
1185 if (!local
->open_count
)
1189 * Upon resume hardware can sometimes be goofy due to
1190 * various platform / driver / bus issues, so restarting
1191 * the device may at times not work immediately. Propagate
1194 res
= drv_start(local
);
1196 WARN(local
->suspended
, "Hardware became unavailable "
1197 "upon resume. This could be a software issue "
1198 "prior to suspend or a hardware issue.\n");
1202 /* setup fragmentation threshold */
1203 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1205 /* setup RTS threshold */
1206 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1208 /* reset coverage class */
1209 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1211 ieee80211_led_radio(local
, true);
1212 ieee80211_mod_tpt_led_trig(local
,
1213 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1215 /* add interfaces */
1216 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1217 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1218 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1219 ieee80211_sdata_running(sdata
))
1220 res
= drv_add_interface(local
, sdata
);
1224 mutex_lock(&local
->sta_mtx
);
1225 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1226 if (sta
->uploaded
) {
1227 enum ieee80211_sta_state state
;
1229 for (state
= IEEE80211_STA_NOTEXIST
;
1230 state
< sta
->sta_state
- 1; state
++)
1231 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
,
1235 mutex_unlock(&local
->sta_mtx
);
1237 /* reconfigure tx conf */
1238 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1239 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1240 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1241 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1242 !ieee80211_sdata_running(sdata
))
1245 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1246 drv_conf_tx(local
, sdata
, i
,
1247 &sdata
->tx_conf
[i
]);
1251 /* reconfigure hardware */
1252 ieee80211_hw_config(local
, ~0);
1254 ieee80211_configure_filter(local
);
1256 /* Finally also reconfigure all the BSS information */
1257 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1260 if (!ieee80211_sdata_running(sdata
))
1263 /* common change flags for all interface types */
1264 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1265 BSS_CHANGED_ERP_PREAMBLE
|
1266 BSS_CHANGED_ERP_SLOT
|
1268 BSS_CHANGED_BASIC_RATES
|
1269 BSS_CHANGED_BEACON_INT
|
1275 switch (sdata
->vif
.type
) {
1276 case NL80211_IFTYPE_STATION
:
1277 changed
|= BSS_CHANGED_ASSOC
|
1278 BSS_CHANGED_ARP_FILTER
;
1279 mutex_lock(&sdata
->u
.mgd
.mtx
);
1280 ieee80211_bss_info_change_notify(sdata
, changed
);
1281 mutex_unlock(&sdata
->u
.mgd
.mtx
);
1283 case NL80211_IFTYPE_ADHOC
:
1284 changed
|= BSS_CHANGED_IBSS
;
1286 case NL80211_IFTYPE_AP
:
1287 changed
|= BSS_CHANGED_SSID
;
1289 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1290 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1293 case NL80211_IFTYPE_MESH_POINT
:
1294 changed
|= BSS_CHANGED_BEACON
|
1295 BSS_CHANGED_BEACON_ENABLED
;
1296 ieee80211_bss_info_change_notify(sdata
, changed
);
1298 case NL80211_IFTYPE_WDS
:
1300 case NL80211_IFTYPE_AP_VLAN
:
1301 case NL80211_IFTYPE_MONITOR
:
1302 /* ignore virtual */
1304 case NL80211_IFTYPE_UNSPECIFIED
:
1305 case NUM_NL80211_IFTYPES
:
1306 case NL80211_IFTYPE_P2P_CLIENT
:
1307 case NL80211_IFTYPE_P2P_GO
:
1313 ieee80211_recalc_ps(local
, -1);
1316 * The sta might be in psm against the ap (e.g. because
1317 * this was the state before a hw restart), so we
1318 * explicitly send a null packet in order to make sure
1319 * it'll sync against the ap (and get out of psm).
1321 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1322 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1323 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1326 ieee80211_send_nullfunc(local
, sdata
, 0);
1331 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1332 * sessions can be established after a resume.
1334 * Also tear down aggregation sessions since reconfiguring
1335 * them in a hardware restart scenario is not easily done
1336 * right now, and the hardware will have lost information
1337 * about the sessions, but we and the AP still think they
1338 * are active. This is really a workaround though.
1340 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1341 mutex_lock(&local
->sta_mtx
);
1343 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1344 ieee80211_sta_tear_down_BA_sessions(sta
, true);
1345 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1348 mutex_unlock(&local
->sta_mtx
);
1352 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1353 if (ieee80211_sdata_running(sdata
))
1354 ieee80211_enable_keys(sdata
);
1357 ieee80211_wake_queues_by_reason(hw
,
1358 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1361 * If this is for hw restart things are still running.
1362 * We may want to change that later, however.
1364 if (!local
->suspended
)
1368 /* first set suspended false, then resuming */
1369 local
->suspended
= false;
1371 local
->resuming
= false;
1373 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1374 switch(sdata
->vif
.type
) {
1375 case NL80211_IFTYPE_STATION
:
1376 ieee80211_sta_restart(sdata
);
1378 case NL80211_IFTYPE_ADHOC
:
1379 ieee80211_ibss_restart(sdata
);
1381 case NL80211_IFTYPE_MESH_POINT
:
1382 ieee80211_mesh_restart(sdata
);
1389 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1391 mutex_lock(&local
->sta_mtx
);
1392 list_for_each_entry(sta
, &local
->sta_list
, list
)
1393 mesh_plink_restart(sta
);
1394 mutex_unlock(&local
->sta_mtx
);
1401 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1403 struct ieee80211_sub_if_data
*sdata
;
1404 struct ieee80211_local
*local
;
1405 struct ieee80211_key
*key
;
1410 sdata
= vif_to_sdata(vif
);
1411 local
= sdata
->local
;
1413 if (WARN_ON(!local
->resuming
))
1416 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1419 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1421 mutex_lock(&local
->key_mtx
);
1422 list_for_each_entry(key
, &sdata
->key_list
, list
)
1423 key
->flags
|= KEY_FLAG_TAINTED
;
1424 mutex_unlock(&local
->key_mtx
);
1426 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1428 static int check_mgd_smps(struct ieee80211_if_managed
*ifmgd
,
1429 enum ieee80211_smps_mode
*smps_mode
)
1431 if (ifmgd
->associated
) {
1432 *smps_mode
= ifmgd
->ap_smps
;
1434 if (*smps_mode
== IEEE80211_SMPS_AUTOMATIC
) {
1435 if (ifmgd
->powersave
)
1436 *smps_mode
= IEEE80211_SMPS_DYNAMIC
;
1438 *smps_mode
= IEEE80211_SMPS_OFF
;
1447 /* must hold iflist_mtx */
1448 void ieee80211_recalc_smps(struct ieee80211_local
*local
)
1450 struct ieee80211_sub_if_data
*sdata
;
1451 enum ieee80211_smps_mode smps_mode
= IEEE80211_SMPS_OFF
;
1454 lockdep_assert_held(&local
->iflist_mtx
);
1457 * This function could be improved to handle multiple
1458 * interfaces better, but right now it makes any
1459 * non-station interfaces force SM PS to be turned
1460 * off. If there are multiple station interfaces it
1461 * could also use the best possible mode, e.g. if
1462 * one is in static and the other in dynamic then
1466 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1467 if (!ieee80211_sdata_running(sdata
))
1469 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1472 count
+= check_mgd_smps(&sdata
->u
.mgd
, &smps_mode
);
1475 smps_mode
= IEEE80211_SMPS_OFF
;
1480 if (smps_mode
== local
->smps_mode
)
1484 local
->smps_mode
= smps_mode
;
1485 /* changed flag is auto-detected for this */
1486 ieee80211_hw_config(local
, 0);
1489 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1493 for (i
= 0; i
< n_ids
; i
++)
1500 * ieee80211_ie_split - split an IE buffer according to ordering
1502 * @ies: the IE buffer
1503 * @ielen: the length of the IE buffer
1504 * @ids: an array with element IDs that are allowed before
1506 * @n_ids: the size of the element ID array
1507 * @offset: offset where to start splitting in the buffer
1509 * This function splits an IE buffer by updating the @offset
1510 * variable to point to the location where the buffer should be
1513 * It assumes that the given IE buffer is well-formed, this
1514 * has to be guaranteed by the caller!
1516 * It also assumes that the IEs in the buffer are ordered
1517 * correctly, if not the result of using this function will not
1518 * be ordered correctly either, i.e. it does no reordering.
1520 * The function returns the offset where the next part of the
1521 * buffer starts, which may be @ielen if the entire (remainder)
1522 * of the buffer should be used.
1524 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1525 const u8
*ids
, int n_ids
, size_t offset
)
1527 size_t pos
= offset
;
1529 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1530 pos
+= 2 + ies
[pos
+ 1];
1535 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1537 size_t pos
= offset
;
1539 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1540 pos
+= 2 + ies
[pos
+ 1];
1545 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1549 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1551 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1555 * Scale up threshold values before storing it, as the RSSI averaging
1556 * algorithm uses a scaled up value as well. Change this scaling
1557 * factor if the RSSI averaging algorithm changes.
1559 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1560 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1563 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1567 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1569 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1570 rssi_min_thold
> rssi_max_thold
);
1572 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1575 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1577 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1579 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1581 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1583 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1585 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1590 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1591 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1592 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1594 /* capability flags */
1595 tmp
= cpu_to_le16(cap
);
1596 memcpy(pos
, &tmp
, sizeof(u16
));
1599 /* AMPDU parameters */
1600 *pos
++ = ht_cap
->ampdu_factor
|
1601 (ht_cap
->ampdu_density
<<
1602 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1605 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1606 pos
+= sizeof(ht_cap
->mcs
);
1608 /* extended capabilities */
1609 pos
+= sizeof(__le16
);
1611 /* BF capabilities */
1612 pos
+= sizeof(__le32
);
1614 /* antenna selection */
1620 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1621 struct ieee80211_channel
*channel
,
1622 enum nl80211_channel_type channel_type
)
1624 struct ieee80211_ht_operation
*ht_oper
;
1625 /* Build HT Information */
1626 *pos
++ = WLAN_EID_HT_OPERATION
;
1627 *pos
++ = sizeof(struct ieee80211_ht_operation
);
1628 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
1629 ht_oper
->primary_chan
=
1630 ieee80211_frequency_to_channel(channel
->center_freq
);
1631 switch (channel_type
) {
1632 case NL80211_CHAN_HT40MINUS
:
1633 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1635 case NL80211_CHAN_HT40PLUS
:
1636 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1638 case NL80211_CHAN_HT20
:
1640 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1643 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
)
1644 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1647 * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
1648 * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
1650 ht_oper
->operation_mode
= 0x0000;
1651 ht_oper
->stbc_param
= 0x0000;
1653 /* It seems that Basic MCS set and Supported MCS set
1654 are identical for the first 10 bytes */
1655 memset(&ht_oper
->basic_set
, 0, 16);
1656 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
1658 return pos
+ sizeof(struct ieee80211_ht_operation
);
1661 enum nl80211_channel_type
1662 ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation
*ht_oper
)
1664 enum nl80211_channel_type channel_type
;
1667 return NL80211_CHAN_NO_HT
;
1669 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
1670 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1671 channel_type
= NL80211_CHAN_HT20
;
1673 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1674 channel_type
= NL80211_CHAN_HT40PLUS
;
1676 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1677 channel_type
= NL80211_CHAN_HT40MINUS
;
1680 channel_type
= NL80211_CHAN_NO_HT
;
1683 return channel_type
;
1686 int ieee80211_add_srates_ie(struct ieee80211_vif
*vif
, struct sk_buff
*skb
)
1688 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1689 struct ieee80211_local
*local
= sdata
->local
;
1690 struct ieee80211_supported_band
*sband
;
1694 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1695 rates
= sband
->n_bitrates
;
1699 if (skb_tailroom(skb
) < rates
+ 2)
1702 pos
= skb_put(skb
, rates
+ 2);
1703 *pos
++ = WLAN_EID_SUPP_RATES
;
1705 for (i
= 0; i
< rates
; i
++) {
1706 rate
= sband
->bitrates
[i
].bitrate
;
1707 *pos
++ = (u8
) (rate
/ 5);
1713 int ieee80211_add_ext_srates_ie(struct ieee80211_vif
*vif
, struct sk_buff
*skb
)
1715 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1716 struct ieee80211_local
*local
= sdata
->local
;
1717 struct ieee80211_supported_band
*sband
;
1719 u8 i
, exrates
, *pos
;
1721 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1722 exrates
= sband
->n_bitrates
;
1728 if (skb_tailroom(skb
) < exrates
+ 2)
1732 pos
= skb_put(skb
, exrates
+ 2);
1733 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1735 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
1736 rate
= sband
->bitrates
[i
].bitrate
;
1737 *pos
++ = (u8
) (rate
/ 5);