2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 void *mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
39 struct ieee80211_hw
*wiphy_to_ieee80211_hw(struct wiphy
*wiphy
)
41 struct ieee80211_local
*local
;
44 local
= wiphy_priv(wiphy
);
47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw
);
49 u8
*ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
,
50 enum nl80211_iftype type
)
52 __le16 fc
= hdr
->frame_control
;
54 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
58 if (ieee80211_is_data(fc
)) {
59 if (len
< 24) /* drop incorrect hdr len (data) */
62 if (ieee80211_has_a4(fc
))
64 if (ieee80211_has_tods(fc
))
66 if (ieee80211_has_fromds(fc
))
72 if (ieee80211_is_mgmt(fc
)) {
73 if (len
< 24) /* drop incorrect hdr len (mgmt) */
78 if (ieee80211_is_ctl(fc
)) {
79 if(ieee80211_is_pspoll(fc
))
82 if (ieee80211_is_back_req(fc
)) {
84 case NL80211_IFTYPE_STATION
:
86 case NL80211_IFTYPE_AP
:
87 case NL80211_IFTYPE_AP_VLAN
:
90 break; /* fall through to the return */
98 void ieee80211_tx_set_protected(struct ieee80211_tx_data
*tx
)
101 struct ieee80211_hdr
*hdr
;
103 skb_queue_walk(&tx
->skbs
, skb
) {
104 hdr
= (struct ieee80211_hdr
*) skb
->data
;
105 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
109 int ieee80211_frame_duration(enum ieee80211_band band
, size_t len
,
110 int rate
, int erp
, int short_preamble
)
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
123 if (band
== IEEE80211_BAND_5GHZ
|| erp
) {
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
137 dur
= 16; /* SIFS + signal ext */
138 dur
+= 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur
+= 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
141 4 * rate
); /* T_SYM x N_SYM */
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
153 dur
= 10; /* aSIFSTime = 10 usec */
154 dur
+= short_preamble
? (72 + 24) : (144 + 48);
156 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
162 /* Exported duration function for driver use */
163 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
164 struct ieee80211_vif
*vif
,
165 enum ieee80211_band band
,
167 struct ieee80211_rate
*rate
)
169 struct ieee80211_sub_if_data
*sdata
;
172 bool short_preamble
= false;
176 sdata
= vif_to_sdata(vif
);
177 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
178 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
179 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
182 dur
= ieee80211_frame_duration(band
, frame_len
, rate
->bitrate
, erp
,
185 return cpu_to_le16(dur
);
187 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
189 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
190 struct ieee80211_vif
*vif
, size_t frame_len
,
191 const struct ieee80211_tx_info
*frame_txctl
)
193 struct ieee80211_local
*local
= hw_to_local(hw
);
194 struct ieee80211_rate
*rate
;
195 struct ieee80211_sub_if_data
*sdata
;
199 struct ieee80211_supported_band
*sband
;
201 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
203 short_preamble
= false;
205 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
209 sdata
= vif_to_sdata(vif
);
210 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
211 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
212 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
216 dur
= ieee80211_frame_duration(sband
->band
, 10, rate
->bitrate
,
217 erp
, short_preamble
);
218 /* Data frame duration */
219 dur
+= ieee80211_frame_duration(sband
->band
, frame_len
, rate
->bitrate
,
220 erp
, short_preamble
);
222 dur
+= ieee80211_frame_duration(sband
->band
, 10, rate
->bitrate
,
223 erp
, short_preamble
);
225 return cpu_to_le16(dur
);
227 EXPORT_SYMBOL(ieee80211_rts_duration
);
229 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
230 struct ieee80211_vif
*vif
,
232 const struct ieee80211_tx_info
*frame_txctl
)
234 struct ieee80211_local
*local
= hw_to_local(hw
);
235 struct ieee80211_rate
*rate
;
236 struct ieee80211_sub_if_data
*sdata
;
240 struct ieee80211_supported_band
*sband
;
242 sband
= local
->hw
.wiphy
->bands
[frame_txctl
->band
];
244 short_preamble
= false;
246 rate
= &sband
->bitrates
[frame_txctl
->control
.rts_cts_rate_idx
];
249 sdata
= vif_to_sdata(vif
);
250 short_preamble
= sdata
->vif
.bss_conf
.use_short_preamble
;
251 if (sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
)
252 erp
= rate
->flags
& IEEE80211_RATE_ERP_G
;
255 /* Data frame duration */
256 dur
= ieee80211_frame_duration(sband
->band
, frame_len
, rate
->bitrate
,
257 erp
, short_preamble
);
258 if (!(frame_txctl
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
260 dur
+= ieee80211_frame_duration(sband
->band
, 10, rate
->bitrate
,
261 erp
, short_preamble
);
264 return cpu_to_le16(dur
);
266 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
268 void ieee80211_propagate_queue_wake(struct ieee80211_local
*local
, int queue
)
270 struct ieee80211_sub_if_data
*sdata
;
271 int n_acs
= IEEE80211_NUM_ACS
;
273 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
276 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
279 if (test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
))
282 if (sdata
->vif
.cab_queue
!= IEEE80211_INVAL_HW_QUEUE
&&
283 local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] != 0)
286 for (ac
= 0; ac
< n_acs
; ac
++) {
287 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
289 if (ac_queue
== queue
||
290 (sdata
->vif
.cab_queue
== queue
&&
291 local
->queue_stop_reasons
[ac_queue
] == 0 &&
292 skb_queue_empty(&local
->pending
[ac_queue
])))
293 netif_wake_subqueue(sdata
->dev
, ac
);
298 static void __ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
,
299 enum queue_stop_reason reason
)
301 struct ieee80211_local
*local
= hw_to_local(hw
);
303 trace_wake_queue(local
, queue
, reason
);
305 if (WARN_ON(queue
>= hw
->queues
))
308 if (!test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
311 __clear_bit(reason
, &local
->queue_stop_reasons
[queue
]);
313 if (local
->queue_stop_reasons
[queue
] != 0)
314 /* someone still has this queue stopped */
317 if (skb_queue_empty(&local
->pending
[queue
])) {
319 ieee80211_propagate_queue_wake(local
, queue
);
322 tasklet_schedule(&local
->tx_pending_tasklet
);
325 void ieee80211_wake_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
326 enum queue_stop_reason reason
)
328 struct ieee80211_local
*local
= hw_to_local(hw
);
331 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
332 __ieee80211_wake_queue(hw
, queue
, reason
);
333 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
336 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
338 ieee80211_wake_queue_by_reason(hw
, queue
,
339 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
341 EXPORT_SYMBOL(ieee80211_wake_queue
);
343 static void __ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
,
344 enum queue_stop_reason reason
)
346 struct ieee80211_local
*local
= hw_to_local(hw
);
347 struct ieee80211_sub_if_data
*sdata
;
348 int n_acs
= IEEE80211_NUM_ACS
;
350 trace_stop_queue(local
, queue
, reason
);
352 if (WARN_ON(queue
>= hw
->queues
))
355 if (test_bit(reason
, &local
->queue_stop_reasons
[queue
]))
358 __set_bit(reason
, &local
->queue_stop_reasons
[queue
]);
360 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
364 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
367 for (ac
= 0; ac
< n_acs
; ac
++) {
368 if (sdata
->vif
.hw_queue
[ac
] == queue
||
369 sdata
->vif
.cab_queue
== queue
)
370 netif_stop_subqueue(sdata
->dev
, ac
);
376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw
*hw
, int queue
,
377 enum queue_stop_reason reason
)
379 struct ieee80211_local
*local
= hw_to_local(hw
);
382 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
383 __ieee80211_stop_queue(hw
, queue
, reason
);
384 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
387 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
389 ieee80211_stop_queue_by_reason(hw
, queue
,
390 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
392 EXPORT_SYMBOL(ieee80211_stop_queue
);
394 void ieee80211_add_pending_skb(struct ieee80211_local
*local
,
397 struct ieee80211_hw
*hw
= &local
->hw
;
399 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
400 int queue
= info
->hw_queue
;
402 if (WARN_ON(!info
->control
.vif
)) {
407 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
408 __ieee80211_stop_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
409 __skb_queue_tail(&local
->pending
[queue
], skb
);
410 __ieee80211_wake_queue(hw
, queue
, IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
411 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
414 void ieee80211_add_pending_skbs_fn(struct ieee80211_local
*local
,
415 struct sk_buff_head
*skbs
,
416 void (*fn
)(void *data
), void *data
)
418 struct ieee80211_hw
*hw
= &local
->hw
;
423 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
424 while ((skb
= skb_dequeue(skbs
))) {
425 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
427 if (WARN_ON(!info
->control
.vif
)) {
432 queue
= info
->hw_queue
;
434 __ieee80211_stop_queue(hw
, queue
,
435 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
437 __skb_queue_tail(&local
->pending
[queue
], skb
);
443 for (i
= 0; i
< hw
->queues
; i
++)
444 __ieee80211_wake_queue(hw
, i
,
445 IEEE80211_QUEUE_STOP_REASON_SKB_ADD
);
446 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
449 void ieee80211_stop_queues_by_reason(struct ieee80211_hw
*hw
,
450 enum queue_stop_reason reason
)
452 struct ieee80211_local
*local
= hw_to_local(hw
);
456 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
458 for (i
= 0; i
< hw
->queues
; i
++)
459 __ieee80211_stop_queue(hw
, i
, reason
);
461 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
464 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
466 ieee80211_stop_queues_by_reason(hw
,
467 IEEE80211_QUEUE_STOP_REASON_DRIVER
);
469 EXPORT_SYMBOL(ieee80211_stop_queues
);
471 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
)
473 struct ieee80211_local
*local
= hw_to_local(hw
);
477 if (WARN_ON(queue
>= hw
->queues
))
480 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
481 ret
= !!local
->queue_stop_reasons
[queue
];
482 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
485 EXPORT_SYMBOL(ieee80211_queue_stopped
);
487 void ieee80211_wake_queues_by_reason(struct ieee80211_hw
*hw
,
488 enum queue_stop_reason reason
)
490 struct ieee80211_local
*local
= hw_to_local(hw
);
494 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
496 for (i
= 0; i
< hw
->queues
; i
++)
497 __ieee80211_wake_queue(hw
, i
, reason
);
499 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
502 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
504 ieee80211_wake_queues_by_reason(hw
, IEEE80211_QUEUE_STOP_REASON_DRIVER
);
506 EXPORT_SYMBOL(ieee80211_wake_queues
);
508 void ieee80211_iterate_active_interfaces(
509 struct ieee80211_hw
*hw
,
510 void (*iterator
)(void *data
, u8
*mac
,
511 struct ieee80211_vif
*vif
),
514 struct ieee80211_local
*local
= hw_to_local(hw
);
515 struct ieee80211_sub_if_data
*sdata
;
517 mutex_lock(&local
->iflist_mtx
);
519 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
520 switch (sdata
->vif
.type
) {
521 case NL80211_IFTYPE_MONITOR
:
522 case NL80211_IFTYPE_AP_VLAN
:
527 if (ieee80211_sdata_running(sdata
))
528 iterator(data
, sdata
->vif
.addr
,
532 mutex_unlock(&local
->iflist_mtx
);
534 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces
);
536 void ieee80211_iterate_active_interfaces_atomic(
537 struct ieee80211_hw
*hw
,
538 void (*iterator
)(void *data
, u8
*mac
,
539 struct ieee80211_vif
*vif
),
542 struct ieee80211_local
*local
= hw_to_local(hw
);
543 struct ieee80211_sub_if_data
*sdata
;
547 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
548 switch (sdata
->vif
.type
) {
549 case NL80211_IFTYPE_MONITOR
:
550 case NL80211_IFTYPE_AP_VLAN
:
555 if (ieee80211_sdata_running(sdata
))
556 iterator(data
, sdata
->vif
.addr
,
562 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic
);
565 * Nothing should have been stuffed into the workqueue during
566 * the suspend->resume cycle. If this WARN is seen then there
567 * is a bug with either the driver suspend or something in
568 * mac80211 stuffing into the workqueue which we haven't yet
569 * cleared during mac80211's suspend cycle.
571 static bool ieee80211_can_queue_work(struct ieee80211_local
*local
)
573 if (WARN(local
->suspended
&& !local
->resuming
,
574 "queueing ieee80211 work while going to suspend\n"))
580 void ieee80211_queue_work(struct ieee80211_hw
*hw
, struct work_struct
*work
)
582 struct ieee80211_local
*local
= hw_to_local(hw
);
584 if (!ieee80211_can_queue_work(local
))
587 queue_work(local
->workqueue
, work
);
589 EXPORT_SYMBOL(ieee80211_queue_work
);
591 void ieee80211_queue_delayed_work(struct ieee80211_hw
*hw
,
592 struct delayed_work
*dwork
,
595 struct ieee80211_local
*local
= hw_to_local(hw
);
597 if (!ieee80211_can_queue_work(local
))
600 queue_delayed_work(local
->workqueue
, dwork
, delay
);
602 EXPORT_SYMBOL(ieee80211_queue_delayed_work
);
604 u32
ieee802_11_parse_elems_crc(u8
*start
, size_t len
,
605 struct ieee802_11_elems
*elems
,
610 bool calc_crc
= filter
!= 0;
611 DECLARE_BITMAP(seen_elems
, 256);
613 bitmap_zero(seen_elems
, 256);
614 memset(elems
, 0, sizeof(*elems
));
615 elems
->ie_start
= start
;
616 elems
->total_len
= len
;
620 bool elem_parse_failed
;
627 elems
->parse_error
= true;
631 if (id
!= WLAN_EID_VENDOR_SPECIFIC
&&
632 id
!= WLAN_EID_QUIET
&&
633 test_bit(id
, seen_elems
)) {
634 elems
->parse_error
= true;
640 if (calc_crc
&& id
< 64 && (filter
& (1ULL << id
)))
641 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
643 elem_parse_failed
= false;
648 elems
->ssid_len
= elen
;
650 case WLAN_EID_SUPP_RATES
:
651 elems
->supp_rates
= pos
;
652 elems
->supp_rates_len
= elen
;
654 case WLAN_EID_FH_PARAMS
:
655 elems
->fh_params
= pos
;
656 elems
->fh_params_len
= elen
;
658 case WLAN_EID_DS_PARAMS
:
659 elems
->ds_params
= pos
;
660 elems
->ds_params_len
= elen
;
662 case WLAN_EID_CF_PARAMS
:
663 elems
->cf_params
= pos
;
664 elems
->cf_params_len
= elen
;
667 if (elen
>= sizeof(struct ieee80211_tim_ie
)) {
668 elems
->tim
= (void *)pos
;
669 elems
->tim_len
= elen
;
671 elem_parse_failed
= true;
673 case WLAN_EID_IBSS_PARAMS
:
674 elems
->ibss_params
= pos
;
675 elems
->ibss_params_len
= elen
;
677 case WLAN_EID_CHALLENGE
:
678 elems
->challenge
= pos
;
679 elems
->challenge_len
= elen
;
681 case WLAN_EID_VENDOR_SPECIFIC
:
682 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
684 /* Microsoft OUI (00:50:F2) */
687 crc
= crc32_be(crc
, pos
- 2, elen
+ 2);
690 /* OUI Type 1 - WPA IE */
692 elems
->wpa_len
= elen
;
693 } else if (elen
>= 5 && pos
[3] == 2) {
694 /* OUI Type 2 - WMM IE */
696 elems
->wmm_info
= pos
;
697 elems
->wmm_info_len
= elen
;
698 } else if (pos
[4] == 1) {
699 elems
->wmm_param
= pos
;
700 elems
->wmm_param_len
= elen
;
707 elems
->rsn_len
= elen
;
709 case WLAN_EID_ERP_INFO
:
710 elems
->erp_info
= pos
;
711 elems
->erp_info_len
= elen
;
713 case WLAN_EID_EXT_SUPP_RATES
:
714 elems
->ext_supp_rates
= pos
;
715 elems
->ext_supp_rates_len
= elen
;
717 case WLAN_EID_HT_CAPABILITY
:
718 if (elen
>= sizeof(struct ieee80211_ht_cap
))
719 elems
->ht_cap_elem
= (void *)pos
;
721 elem_parse_failed
= true;
723 case WLAN_EID_HT_OPERATION
:
724 if (elen
>= sizeof(struct ieee80211_ht_operation
))
725 elems
->ht_operation
= (void *)pos
;
727 elem_parse_failed
= true;
729 case WLAN_EID_MESH_ID
:
730 elems
->mesh_id
= pos
;
731 elems
->mesh_id_len
= elen
;
733 case WLAN_EID_MESH_CONFIG
:
734 if (elen
>= sizeof(struct ieee80211_meshconf_ie
))
735 elems
->mesh_config
= (void *)pos
;
737 elem_parse_failed
= true;
739 case WLAN_EID_PEER_MGMT
:
740 elems
->peering
= pos
;
741 elems
->peering_len
= elen
;
745 elems
->preq_len
= elen
;
749 elems
->prep_len
= elen
;
753 elems
->perr_len
= elen
;
756 if (elen
>= sizeof(struct ieee80211_rann_ie
))
757 elems
->rann
= (void *)pos
;
759 elem_parse_failed
= true;
761 case WLAN_EID_CHANNEL_SWITCH
:
762 elems
->ch_switch_elem
= pos
;
763 elems
->ch_switch_elem_len
= elen
;
766 if (!elems
->quiet_elem
) {
767 elems
->quiet_elem
= pos
;
768 elems
->quiet_elem_len
= elen
;
770 elems
->num_of_quiet_elem
++;
772 case WLAN_EID_COUNTRY
:
773 elems
->country_elem
= pos
;
774 elems
->country_elem_len
= elen
;
776 case WLAN_EID_PWR_CONSTRAINT
:
777 elems
->pwr_constr_elem
= pos
;
778 elems
->pwr_constr_elem_len
= elen
;
780 case WLAN_EID_TIMEOUT_INTERVAL
:
781 elems
->timeout_int
= pos
;
782 elems
->timeout_int_len
= elen
;
788 if (elem_parse_failed
)
789 elems
->parse_error
= true;
791 set_bit(id
, seen_elems
);
798 elems
->parse_error
= true;
803 void ieee802_11_parse_elems(u8
*start
, size_t len
,
804 struct ieee802_11_elems
*elems
)
806 ieee802_11_parse_elems_crc(start
, len
, elems
, 0, 0);
809 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data
*sdata
,
812 struct ieee80211_local
*local
= sdata
->local
;
813 struct ieee80211_tx_queue_params qparam
;
815 bool use_11b
, enable_qos
;
818 if (!local
->ops
->conf_tx
)
821 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
824 memset(&qparam
, 0, sizeof(qparam
));
826 use_11b
= (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) &&
827 !(sdata
->flags
& IEEE80211_SDATA_OPERATING_GMODE
);
830 * By default disable QoS in STA mode for old access points, which do
831 * not support 802.11e. New APs will provide proper queue parameters,
832 * that we will configure later.
834 enable_qos
= (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
836 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
837 /* Set defaults according to 802.11-2007 Table 7-37 */
846 case IEEE80211_AC_BK
:
847 qparam
.cw_max
= aCWmax
;
848 qparam
.cw_min
= aCWmin
;
852 /* never happens but let's not leave undefined */
854 case IEEE80211_AC_BE
:
855 qparam
.cw_max
= aCWmax
;
856 qparam
.cw_min
= aCWmin
;
860 case IEEE80211_AC_VI
:
861 qparam
.cw_max
= aCWmin
;
862 qparam
.cw_min
= (aCWmin
+ 1) / 2 - 1;
864 qparam
.txop
= 6016/32;
866 qparam
.txop
= 3008/32;
869 case IEEE80211_AC_VO
:
870 qparam
.cw_max
= (aCWmin
+ 1) / 2 - 1;
871 qparam
.cw_min
= (aCWmin
+ 1) / 4 - 1;
873 qparam
.txop
= 3264/32;
875 qparam
.txop
= 1504/32;
880 /* Confiure old 802.11b/g medium access rules. */
881 qparam
.cw_max
= aCWmax
;
882 qparam
.cw_min
= aCWmin
;
887 qparam
.uapsd
= false;
889 sdata
->tx_conf
[ac
] = qparam
;
890 drv_conf_tx(local
, sdata
, ac
, &qparam
);
893 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) {
894 sdata
->vif
.bss_conf
.qos
= enable_qos
;
896 ieee80211_bss_info_change_notify(sdata
,
901 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
902 const size_t supp_rates_len
,
903 const u8
*supp_rates
)
905 struct ieee80211_local
*local
= sdata
->local
;
906 int i
, have_higher_than_11mbit
= 0;
908 /* cf. IEEE 802.11 9.2.12 */
909 for (i
= 0; i
< supp_rates_len
; i
++)
910 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
911 have_higher_than_11mbit
= 1;
913 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
914 have_higher_than_11mbit
)
915 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
917 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
919 ieee80211_set_wmm_default(sdata
, true);
922 u32
ieee80211_mandatory_rates(struct ieee80211_local
*local
,
923 enum ieee80211_band band
)
925 struct ieee80211_supported_band
*sband
;
926 struct ieee80211_rate
*bitrates
;
928 enum ieee80211_rate_flags mandatory_flag
;
931 sband
= local
->hw
.wiphy
->bands
[band
];
935 if (band
== IEEE80211_BAND_2GHZ
)
936 mandatory_flag
= IEEE80211_RATE_MANDATORY_B
;
938 mandatory_flag
= IEEE80211_RATE_MANDATORY_A
;
940 bitrates
= sband
->bitrates
;
942 for (i
= 0; i
< sband
->n_bitrates
; i
++)
943 if (bitrates
[i
].flags
& mandatory_flag
)
944 mandatory_rates
|= BIT(i
);
945 return mandatory_rates
;
948 void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
949 u16 transaction
, u16 auth_alg
,
950 u8
*extra
, size_t extra_len
, const u8
*da
,
951 const u8
*bssid
, const u8
*key
, u8 key_len
, u8 key_idx
)
953 struct ieee80211_local
*local
= sdata
->local
;
955 struct ieee80211_mgmt
*mgmt
;
958 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
959 sizeof(*mgmt
) + 6 + extra_len
);
963 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
965 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
966 memset(mgmt
, 0, 24 + 6);
967 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
968 IEEE80211_STYPE_AUTH
);
969 memcpy(mgmt
->da
, da
, ETH_ALEN
);
970 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
971 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
972 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(auth_alg
);
973 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
974 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
976 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
978 if (auth_alg
== WLAN_AUTH_SHARED_KEY
&& transaction
== 3) {
979 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
980 err
= ieee80211_wep_encrypt(local
, skb
, key
, key_len
, key_idx
);
984 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
985 ieee80211_tx_skb(sdata
, skb
);
988 int ieee80211_build_preq_ies(struct ieee80211_local
*local
, u8
*buffer
,
989 const u8
*ie
, size_t ie_len
,
990 enum ieee80211_band band
, u32 rate_mask
,
993 struct ieee80211_supported_band
*sband
;
995 size_t offset
= 0, noffset
;
996 int supp_rates_len
, i
;
1001 sband
= local
->hw
.wiphy
->bands
[band
];
1006 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
1007 if ((BIT(i
) & rate_mask
) == 0)
1008 continue; /* skip rate */
1009 rates
[num_rates
++] = (u8
) (sband
->bitrates
[i
].bitrate
/ 5);
1012 supp_rates_len
= min_t(int, num_rates
, 8);
1014 *pos
++ = WLAN_EID_SUPP_RATES
;
1015 *pos
++ = supp_rates_len
;
1016 memcpy(pos
, rates
, supp_rates_len
);
1017 pos
+= supp_rates_len
;
1019 /* insert "request information" if in custom IEs */
1021 static const u8 before_extrates
[] = {
1023 WLAN_EID_SUPP_RATES
,
1026 noffset
= ieee80211_ie_split(ie
, ie_len
,
1028 ARRAY_SIZE(before_extrates
),
1030 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1031 pos
+= noffset
- offset
;
1035 ext_rates_len
= num_rates
- supp_rates_len
;
1036 if (ext_rates_len
> 0) {
1037 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1038 *pos
++ = ext_rates_len
;
1039 memcpy(pos
, rates
+ supp_rates_len
, ext_rates_len
);
1040 pos
+= ext_rates_len
;
1043 if (channel
&& sband
->band
== IEEE80211_BAND_2GHZ
) {
1044 *pos
++ = WLAN_EID_DS_PARAMS
;
1049 /* insert custom IEs that go before HT */
1051 static const u8 before_ht
[] = {
1053 WLAN_EID_SUPP_RATES
,
1055 WLAN_EID_EXT_SUPP_RATES
,
1057 WLAN_EID_SUPPORTED_REGULATORY_CLASSES
,
1059 noffset
= ieee80211_ie_split(ie
, ie_len
,
1060 before_ht
, ARRAY_SIZE(before_ht
),
1062 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1063 pos
+= noffset
- offset
;
1067 if (sband
->ht_cap
.ht_supported
)
1068 pos
= ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
,
1072 * If adding more here, adjust code in main.c
1073 * that calculates local->scan_ies_len.
1076 /* add any remaining custom IEs */
1079 memcpy(pos
, ie
+ offset
, noffset
- offset
);
1080 pos
+= noffset
- offset
;
1083 if (sband
->vht_cap
.vht_supported
)
1084 pos
= ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
,
1085 sband
->vht_cap
.cap
);
1087 return pos
- buffer
;
1090 struct sk_buff
*ieee80211_build_probe_req(struct ieee80211_sub_if_data
*sdata
,
1091 u8
*dst
, u32 ratemask
,
1092 const u8
*ssid
, size_t ssid_len
,
1093 const u8
*ie
, size_t ie_len
,
1096 struct ieee80211_local
*local
= sdata
->local
;
1097 struct sk_buff
*skb
;
1098 struct ieee80211_mgmt
*mgmt
;
1103 /* FIXME: come up with a proper value */
1104 buf
= kmalloc(200 + ie_len
, GFP_KERNEL
);
1109 * Do not send DS Channel parameter for directed probe requests
1110 * in order to maximize the chance that we get a response. Some
1111 * badly-behaved APs don't respond when this parameter is included.
1116 chan
= ieee80211_frequency_to_channel(
1117 local
->hw
.conf
.channel
->center_freq
);
1119 buf_len
= ieee80211_build_preq_ies(local
, buf
, ie
, ie_len
,
1120 local
->hw
.conf
.channel
->band
,
1123 skb
= ieee80211_probereq_get(&local
->hw
, &sdata
->vif
,
1130 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1131 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
1132 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
1135 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1143 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
1144 const u8
*ssid
, size_t ssid_len
,
1145 const u8
*ie
, size_t ie_len
,
1146 u32 ratemask
, bool directed
, bool no_cck
)
1148 struct sk_buff
*skb
;
1150 skb
= ieee80211_build_probe_req(sdata
, dst
, ratemask
, ssid
, ssid_len
,
1151 ie
, ie_len
, directed
);
1154 IEEE80211_SKB_CB(skb
)->flags
|=
1155 IEEE80211_TX_CTL_NO_CCK_RATE
;
1156 ieee80211_tx_skb(sdata
, skb
);
1160 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
1161 struct ieee802_11_elems
*elems
,
1162 enum ieee80211_band band
, u32
*basic_rates
)
1164 struct ieee80211_supported_band
*sband
;
1165 struct ieee80211_rate
*bitrates
;
1169 sband
= local
->hw
.wiphy
->bands
[band
];
1171 if (WARN_ON(!sband
))
1174 bitrates
= sband
->bitrates
;
1175 num_rates
= sband
->n_bitrates
;
1177 for (i
= 0; i
< elems
->supp_rates_len
+
1178 elems
->ext_supp_rates_len
; i
++) {
1182 if (i
< elems
->supp_rates_len
)
1183 rate
= elems
->supp_rates
[i
];
1184 else if (elems
->ext_supp_rates
)
1185 rate
= elems
->ext_supp_rates
1186 [i
- elems
->supp_rates_len
];
1187 own_rate
= 5 * (rate
& 0x7f);
1188 is_basic
= !!(rate
& 0x80);
1190 if (is_basic
&& (rate
& 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1193 for (j
= 0; j
< num_rates
; j
++) {
1194 if (bitrates
[j
].bitrate
== own_rate
) {
1195 supp_rates
|= BIT(j
);
1196 if (basic_rates
&& is_basic
)
1197 *basic_rates
|= BIT(j
);
1204 void ieee80211_stop_device(struct ieee80211_local
*local
)
1206 ieee80211_led_radio(local
, false);
1207 ieee80211_mod_tpt_led_trig(local
, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO
);
1209 cancel_work_sync(&local
->reconfig_filter
);
1211 flush_workqueue(local
->workqueue
);
1215 int ieee80211_reconfig(struct ieee80211_local
*local
)
1217 struct ieee80211_hw
*hw
= &local
->hw
;
1218 struct ieee80211_sub_if_data
*sdata
;
1219 struct sta_info
*sta
;
1223 if (local
->suspended
)
1224 local
->resuming
= true;
1226 if (local
->wowlan
) {
1227 local
->wowlan
= false;
1228 res
= drv_resume(local
);
1230 local
->resuming
= false;
1237 * res is 1, which means the driver requested
1238 * to go through a regular reset on wakeup.
1242 /* everything else happens only if HW was up & running */
1243 if (!local
->open_count
)
1247 * Upon resume hardware can sometimes be goofy due to
1248 * various platform / driver / bus issues, so restarting
1249 * the device may at times not work immediately. Propagate
1252 res
= drv_start(local
);
1254 WARN(local
->suspended
, "Hardware became unavailable "
1255 "upon resume. This could be a software issue "
1256 "prior to suspend or a hardware issue.\n");
1260 /* setup fragmentation threshold */
1261 drv_set_frag_threshold(local
, hw
->wiphy
->frag_threshold
);
1263 /* setup RTS threshold */
1264 drv_set_rts_threshold(local
, hw
->wiphy
->rts_threshold
);
1266 /* reset coverage class */
1267 drv_set_coverage_class(local
, hw
->wiphy
->coverage_class
);
1269 ieee80211_led_radio(local
, true);
1270 ieee80211_mod_tpt_led_trig(local
,
1271 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
1273 /* add interfaces */
1274 sdata
= rtnl_dereference(local
->monitor_sdata
);
1276 res
= drv_add_interface(local
, sdata
);
1278 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
1284 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1285 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1286 sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1287 ieee80211_sdata_running(sdata
))
1288 res
= drv_add_interface(local
, sdata
);
1292 mutex_lock(&local
->sta_mtx
);
1293 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1294 enum ieee80211_sta_state state
;
1299 /* AP-mode stations will be added later */
1300 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1303 for (state
= IEEE80211_STA_NOTEXIST
;
1304 state
< sta
->sta_state
; state
++)
1305 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1308 mutex_unlock(&local
->sta_mtx
);
1310 /* reconfigure tx conf */
1311 if (hw
->queues
>= IEEE80211_NUM_ACS
) {
1312 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1313 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
1314 sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
1315 !ieee80211_sdata_running(sdata
))
1318 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++)
1319 drv_conf_tx(local
, sdata
, i
,
1320 &sdata
->tx_conf
[i
]);
1324 /* reconfigure hardware */
1325 ieee80211_hw_config(local
, ~0);
1327 ieee80211_configure_filter(local
);
1329 /* Finally also reconfigure all the BSS information */
1330 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1333 if (!ieee80211_sdata_running(sdata
))
1336 /* common change flags for all interface types */
1337 changed
= BSS_CHANGED_ERP_CTS_PROT
|
1338 BSS_CHANGED_ERP_PREAMBLE
|
1339 BSS_CHANGED_ERP_SLOT
|
1341 BSS_CHANGED_BASIC_RATES
|
1342 BSS_CHANGED_BEACON_INT
|
1348 switch (sdata
->vif
.type
) {
1349 case NL80211_IFTYPE_STATION
:
1350 changed
|= BSS_CHANGED_ASSOC
|
1351 BSS_CHANGED_ARP_FILTER
;
1352 mutex_lock(&sdata
->u
.mgd
.mtx
);
1353 ieee80211_bss_info_change_notify(sdata
, changed
);
1354 mutex_unlock(&sdata
->u
.mgd
.mtx
);
1356 case NL80211_IFTYPE_ADHOC
:
1357 changed
|= BSS_CHANGED_IBSS
;
1359 case NL80211_IFTYPE_AP
:
1360 changed
|= BSS_CHANGED_SSID
;
1362 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1363 changed
|= BSS_CHANGED_AP_PROBE_RESP
;
1366 case NL80211_IFTYPE_MESH_POINT
:
1367 changed
|= BSS_CHANGED_BEACON
|
1368 BSS_CHANGED_BEACON_ENABLED
;
1369 ieee80211_bss_info_change_notify(sdata
, changed
);
1371 case NL80211_IFTYPE_WDS
:
1373 case NL80211_IFTYPE_AP_VLAN
:
1374 case NL80211_IFTYPE_MONITOR
:
1375 /* ignore virtual */
1377 case NL80211_IFTYPE_UNSPECIFIED
:
1378 case NUM_NL80211_IFTYPES
:
1379 case NL80211_IFTYPE_P2P_CLIENT
:
1380 case NL80211_IFTYPE_P2P_GO
:
1386 ieee80211_recalc_ps(local
, -1);
1389 * The sta might be in psm against the ap (e.g. because
1390 * this was the state before a hw restart), so we
1391 * explicitly send a null packet in order to make sure
1392 * it'll sync against the ap (and get out of psm).
1394 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) {
1395 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1396 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1399 ieee80211_send_nullfunc(local
, sdata
, 0);
1403 /* APs are now beaconing, add back stations */
1404 mutex_lock(&local
->sta_mtx
);
1405 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1406 enum ieee80211_sta_state state
;
1411 if (sta
->sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1414 for (state
= IEEE80211_STA_NOTEXIST
;
1415 state
< sta
->sta_state
; state
++)
1416 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
, state
,
1419 mutex_unlock(&local
->sta_mtx
);
1422 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1423 if (ieee80211_sdata_running(sdata
))
1424 ieee80211_enable_keys(sdata
);
1427 local
->in_reconfig
= false;
1431 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1432 * sessions can be established after a resume.
1434 * Also tear down aggregation sessions since reconfiguring
1435 * them in a hardware restart scenario is not easily done
1436 * right now, and the hardware will have lost information
1437 * about the sessions, but we and the AP still think they
1438 * are active. This is really a workaround though.
1440 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
1441 mutex_lock(&local
->sta_mtx
);
1443 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1444 ieee80211_sta_tear_down_BA_sessions(sta
, true);
1445 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1448 mutex_unlock(&local
->sta_mtx
);
1451 ieee80211_wake_queues_by_reason(hw
,
1452 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
1455 * If this is for hw restart things are still running.
1456 * We may want to change that later, however.
1458 if (!local
->suspended
)
1462 /* first set suspended false, then resuming */
1463 local
->suspended
= false;
1465 local
->resuming
= false;
1467 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1468 switch(sdata
->vif
.type
) {
1469 case NL80211_IFTYPE_STATION
:
1470 ieee80211_sta_restart(sdata
);
1472 case NL80211_IFTYPE_ADHOC
:
1473 ieee80211_ibss_restart(sdata
);
1475 case NL80211_IFTYPE_MESH_POINT
:
1476 ieee80211_mesh_restart(sdata
);
1483 mod_timer(&local
->sta_cleanup
, jiffies
+ 1);
1485 mutex_lock(&local
->sta_mtx
);
1486 list_for_each_entry(sta
, &local
->sta_list
, list
)
1487 mesh_plink_restart(sta
);
1488 mutex_unlock(&local
->sta_mtx
);
1495 void ieee80211_resume_disconnect(struct ieee80211_vif
*vif
)
1497 struct ieee80211_sub_if_data
*sdata
;
1498 struct ieee80211_local
*local
;
1499 struct ieee80211_key
*key
;
1504 sdata
= vif_to_sdata(vif
);
1505 local
= sdata
->local
;
1507 if (WARN_ON(!local
->resuming
))
1510 if (WARN_ON(vif
->type
!= NL80211_IFTYPE_STATION
))
1513 sdata
->flags
|= IEEE80211_SDATA_DISCONNECT_RESUME
;
1515 mutex_lock(&local
->key_mtx
);
1516 list_for_each_entry(key
, &sdata
->key_list
, list
)
1517 key
->flags
|= KEY_FLAG_TAINTED
;
1518 mutex_unlock(&local
->key_mtx
);
1520 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect
);
1522 static int check_mgd_smps(struct ieee80211_if_managed
*ifmgd
,
1523 enum ieee80211_smps_mode
*smps_mode
)
1525 if (ifmgd
->associated
) {
1526 *smps_mode
= ifmgd
->ap_smps
;
1528 if (*smps_mode
== IEEE80211_SMPS_AUTOMATIC
) {
1529 if (ifmgd
->powersave
)
1530 *smps_mode
= IEEE80211_SMPS_DYNAMIC
;
1532 *smps_mode
= IEEE80211_SMPS_OFF
;
1541 /* must hold iflist_mtx */
1542 void ieee80211_recalc_smps(struct ieee80211_local
*local
)
1544 struct ieee80211_sub_if_data
*sdata
;
1545 enum ieee80211_smps_mode smps_mode
= IEEE80211_SMPS_OFF
;
1548 lockdep_assert_held(&local
->iflist_mtx
);
1551 * This function could be improved to handle multiple
1552 * interfaces better, but right now it makes any
1553 * non-station interfaces force SM PS to be turned
1554 * off. If there are multiple station interfaces it
1555 * could also use the best possible mode, e.g. if
1556 * one is in static and the other in dynamic then
1560 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1561 if (!ieee80211_sdata_running(sdata
))
1563 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1566 count
+= check_mgd_smps(&sdata
->u
.mgd
, &smps_mode
);
1569 smps_mode
= IEEE80211_SMPS_OFF
;
1574 if (smps_mode
== local
->smps_mode
)
1578 local
->smps_mode
= smps_mode
;
1579 /* changed flag is auto-detected for this */
1580 ieee80211_hw_config(local
, 0);
1583 static bool ieee80211_id_in_list(const u8
*ids
, int n_ids
, u8 id
)
1587 for (i
= 0; i
< n_ids
; i
++)
1594 * ieee80211_ie_split - split an IE buffer according to ordering
1596 * @ies: the IE buffer
1597 * @ielen: the length of the IE buffer
1598 * @ids: an array with element IDs that are allowed before
1600 * @n_ids: the size of the element ID array
1601 * @offset: offset where to start splitting in the buffer
1603 * This function splits an IE buffer by updating the @offset
1604 * variable to point to the location where the buffer should be
1607 * It assumes that the given IE buffer is well-formed, this
1608 * has to be guaranteed by the caller!
1610 * It also assumes that the IEs in the buffer are ordered
1611 * correctly, if not the result of using this function will not
1612 * be ordered correctly either, i.e. it does no reordering.
1614 * The function returns the offset where the next part of the
1615 * buffer starts, which may be @ielen if the entire (remainder)
1616 * of the buffer should be used.
1618 size_t ieee80211_ie_split(const u8
*ies
, size_t ielen
,
1619 const u8
*ids
, int n_ids
, size_t offset
)
1621 size_t pos
= offset
;
1623 while (pos
< ielen
&& ieee80211_id_in_list(ids
, n_ids
, ies
[pos
]))
1624 pos
+= 2 + ies
[pos
+ 1];
1629 size_t ieee80211_ie_split_vendor(const u8
*ies
, size_t ielen
, size_t offset
)
1631 size_t pos
= offset
;
1633 while (pos
< ielen
&& ies
[pos
] != WLAN_EID_VENDOR_SPECIFIC
)
1634 pos
+= 2 + ies
[pos
+ 1];
1639 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data
*sdata
,
1643 trace_api_enable_rssi_reports(sdata
, rssi_min_thold
, rssi_max_thold
);
1645 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1649 * Scale up threshold values before storing it, as the RSSI averaging
1650 * algorithm uses a scaled up value as well. Change this scaling
1651 * factor if the RSSI averaging algorithm changes.
1653 sdata
->u
.mgd
.rssi_min_thold
= rssi_min_thold
*16;
1654 sdata
->u
.mgd
.rssi_max_thold
= rssi_max_thold
*16;
1657 void ieee80211_enable_rssi_reports(struct ieee80211_vif
*vif
,
1661 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1663 WARN_ON(rssi_min_thold
== rssi_max_thold
||
1664 rssi_min_thold
> rssi_max_thold
);
1666 _ieee80211_enable_rssi_reports(sdata
, rssi_min_thold
,
1669 EXPORT_SYMBOL(ieee80211_enable_rssi_reports
);
1671 void ieee80211_disable_rssi_reports(struct ieee80211_vif
*vif
)
1673 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1675 _ieee80211_enable_rssi_reports(sdata
, 0, 0);
1677 EXPORT_SYMBOL(ieee80211_disable_rssi_reports
);
1679 u8
*ieee80211_ie_build_ht_cap(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1684 *pos
++ = WLAN_EID_HT_CAPABILITY
;
1685 *pos
++ = sizeof(struct ieee80211_ht_cap
);
1686 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
1688 /* capability flags */
1689 tmp
= cpu_to_le16(cap
);
1690 memcpy(pos
, &tmp
, sizeof(u16
));
1693 /* AMPDU parameters */
1694 *pos
++ = ht_cap
->ampdu_factor
|
1695 (ht_cap
->ampdu_density
<<
1696 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT
);
1699 memcpy(pos
, &ht_cap
->mcs
, sizeof(ht_cap
->mcs
));
1700 pos
+= sizeof(ht_cap
->mcs
);
1702 /* extended capabilities */
1703 pos
+= sizeof(__le16
);
1705 /* BF capabilities */
1706 pos
+= sizeof(__le32
);
1708 /* antenna selection */
1714 u8
*ieee80211_ie_build_vht_cap(u8
*pos
, struct ieee80211_sta_vht_cap
*vht_cap
,
1719 *pos
++ = WLAN_EID_VHT_CAPABILITY
;
1720 *pos
++ = sizeof(struct ieee80211_vht_capabilities
);
1721 memset(pos
, 0, sizeof(struct ieee80211_vht_capabilities
));
1723 /* capability flags */
1724 tmp
= cpu_to_le32(cap
);
1725 memcpy(pos
, &tmp
, sizeof(u32
));
1729 memcpy(pos
, &vht_cap
->vht_mcs
, sizeof(vht_cap
->vht_mcs
));
1730 pos
+= sizeof(vht_cap
->vht_mcs
);
1735 u8
*ieee80211_ie_build_ht_oper(u8
*pos
, struct ieee80211_sta_ht_cap
*ht_cap
,
1736 struct ieee80211_channel
*channel
,
1737 enum nl80211_channel_type channel_type
,
1740 struct ieee80211_ht_operation
*ht_oper
;
1741 /* Build HT Information */
1742 *pos
++ = WLAN_EID_HT_OPERATION
;
1743 *pos
++ = sizeof(struct ieee80211_ht_operation
);
1744 ht_oper
= (struct ieee80211_ht_operation
*)pos
;
1745 ht_oper
->primary_chan
=
1746 ieee80211_frequency_to_channel(channel
->center_freq
);
1747 switch (channel_type
) {
1748 case NL80211_CHAN_HT40MINUS
:
1749 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1751 case NL80211_CHAN_HT40PLUS
:
1752 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1754 case NL80211_CHAN_HT20
:
1756 ht_oper
->ht_param
= IEEE80211_HT_PARAM_CHA_SEC_NONE
;
1759 if (ht_cap
->cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
&&
1760 channel_type
!= NL80211_CHAN_NO_HT
&&
1761 channel_type
!= NL80211_CHAN_HT20
)
1762 ht_oper
->ht_param
|= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
;
1764 ht_oper
->operation_mode
= cpu_to_le16(prot_mode
);
1765 ht_oper
->stbc_param
= 0x0000;
1767 /* It seems that Basic MCS set and Supported MCS set
1768 are identical for the first 10 bytes */
1769 memset(&ht_oper
->basic_set
, 0, 16);
1770 memcpy(&ht_oper
->basic_set
, &ht_cap
->mcs
, 10);
1772 return pos
+ sizeof(struct ieee80211_ht_operation
);
1775 enum nl80211_channel_type
1776 ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation
*ht_oper
)
1778 enum nl80211_channel_type channel_type
;
1781 return NL80211_CHAN_NO_HT
;
1783 switch (ht_oper
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
1784 case IEEE80211_HT_PARAM_CHA_SEC_NONE
:
1785 channel_type
= NL80211_CHAN_HT20
;
1787 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
1788 channel_type
= NL80211_CHAN_HT40PLUS
;
1790 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
1791 channel_type
= NL80211_CHAN_HT40MINUS
;
1794 channel_type
= NL80211_CHAN_NO_HT
;
1797 return channel_type
;
1800 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data
*sdata
,
1801 struct sk_buff
*skb
, bool need_basic
)
1803 struct ieee80211_local
*local
= sdata
->local
;
1804 struct ieee80211_supported_band
*sband
;
1807 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
1809 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1810 rates
= sband
->n_bitrates
;
1814 if (skb_tailroom(skb
) < rates
+ 2)
1817 pos
= skb_put(skb
, rates
+ 2);
1818 *pos
++ = WLAN_EID_SUPP_RATES
;
1820 for (i
= 0; i
< rates
; i
++) {
1822 if (need_basic
&& basic_rates
& BIT(i
))
1824 rate
= sband
->bitrates
[i
].bitrate
;
1825 *pos
++ = basic
| (u8
) (rate
/ 5);
1831 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data
*sdata
,
1832 struct sk_buff
*skb
, bool need_basic
)
1834 struct ieee80211_local
*local
= sdata
->local
;
1835 struct ieee80211_supported_band
*sband
;
1837 u8 i
, exrates
, *pos
;
1838 u32 basic_rates
= sdata
->vif
.bss_conf
.basic_rates
;
1840 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1841 exrates
= sband
->n_bitrates
;
1847 if (skb_tailroom(skb
) < exrates
+ 2)
1851 pos
= skb_put(skb
, exrates
+ 2);
1852 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1854 for (i
= 8; i
< sband
->n_bitrates
; i
++) {
1856 if (need_basic
&& basic_rates
& BIT(i
))
1858 rate
= sband
->bitrates
[i
].bitrate
;
1859 *pos
++ = basic
| (u8
) (rate
/ 5);
1865 int ieee80211_ave_rssi(struct ieee80211_vif
*vif
)
1867 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1868 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1870 if (WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)) {
1871 /* non-managed type inferfaces */
1874 return ifmgd
->ave_beacon_signal
;
1876 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi
);