2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 static int max_nullfunc_tries
= 2;
32 module_param(max_nullfunc_tries
, int, 0644);
33 MODULE_PARM_DESC(max_nullfunc_tries
,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
36 static int max_probe_tries
= 5;
37 module_param(max_probe_tries
, int, 0644);
38 MODULE_PARM_DESC(max_probe_tries
,
39 "Maximum probe tries before disconnecting (reason 4).");
42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
49 #define IEEE80211_BEACON_LOSS_COUNT 7
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
55 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
61 static int probe_wait_ms
= 500;
62 module_param(probe_wait_ms
, int, 0644);
63 MODULE_PARM_DESC(probe_wait_ms
,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
72 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
78 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
80 #define TMR_RUNNING_TIMER 0
81 #define TMR_RUNNING_CHANSW 1
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
90 /* no action required */
93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH
,
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC
,
101 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
103 lockdep_assert_held(&ifmgd
->mtx
);
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
116 static void run_again(struct ieee80211_if_managed
*ifmgd
,
117 unsigned long timeout
)
119 ASSERT_MGD_MTX(ifmgd
);
121 if (!timer_pending(&ifmgd
->timer
) ||
122 time_before(timeout
, ifmgd
->timer
.expires
))
123 mod_timer(&ifmgd
->timer
, timeout
);
126 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
128 if (sdata
->local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
)
131 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
132 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
135 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
137 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
139 if (unlikely(!sdata
->u
.mgd
.associated
))
142 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
145 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
146 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
148 ifmgd
->probe_send_count
= 0;
151 static int ecw2cw(int ecw
)
153 return (1 << ecw
) - 1;
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
161 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
162 struct ieee80211_ht_info
*hti
,
163 const u8
*bssid
, u16 ap_ht_cap_flags
)
165 struct ieee80211_local
*local
= sdata
->local
;
166 struct ieee80211_supported_band
*sband
;
167 struct sta_info
*sta
;
171 bool enable_ht
= true;
172 enum nl80211_channel_type prev_chantype
;
173 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
175 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
177 prev_chantype
= sdata
->vif
.bss_conf
.channel_type
;
179 /* HT is not supported */
180 if (!sband
->ht_cap
.ht_supported
)
184 hti_cfreq
= ieee80211_channel_to_frequency(hti
->control_chan
,
186 /* check that channel matches the right operating channel */
187 if (local
->hw
.conf
.channel
->center_freq
!= hti_cfreq
) {
188 /* Some APs mess this up, evidently.
189 * Netgear WNDR3700 sometimes reports 4 higher than
190 * the actual channel, for instance.
193 "%s: Wrong control channel in association"
194 " response: configured center-freq: %d"
195 " hti-cfreq: %d hti->control_chan: %d"
196 " band: %d. Disabling HT.\n",
198 local
->hw
.conf
.channel
->center_freq
,
199 hti_cfreq
, hti
->control_chan
,
206 channel_type
= NL80211_CHAN_HT20
;
208 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
209 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
210 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
211 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
212 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
213 if (!(local
->hw
.conf
.channel
->flags
&
214 IEEE80211_CHAN_NO_HT40PLUS
))
215 channel_type
= NL80211_CHAN_HT40PLUS
;
217 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
218 if (!(local
->hw
.conf
.channel
->flags
&
219 IEEE80211_CHAN_NO_HT40MINUS
))
220 channel_type
= NL80211_CHAN_HT40MINUS
;
226 if (local
->tmp_channel
)
227 local
->tmp_channel_type
= channel_type
;
229 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
230 /* can only fail due to HT40+/- mismatch */
231 channel_type
= NL80211_CHAN_HT20
;
232 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, channel_type
));
235 /* channel_type change automatically detected */
236 ieee80211_hw_config(local
, 0);
238 if (prev_chantype
!= channel_type
) {
240 sta
= sta_info_get(sdata
, bssid
);
242 rate_control_rate_update(local
, sband
, sta
,
243 IEEE80211_RC_HT_CHANGED
,
248 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
250 /* if bss configuration changed store the new one */
251 if (sdata
->ht_opmode_valid
!= enable_ht
||
252 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
||
253 prev_chantype
!= channel_type
) {
254 changed
|= BSS_CHANGED_HT
;
255 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
256 sdata
->ht_opmode_valid
= enable_ht
;
262 /* frame sending functions */
264 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
265 const u8
*bssid
, u16 stype
, u16 reason
,
266 void *cookie
, bool send_frame
)
268 struct ieee80211_local
*local
= sdata
->local
;
269 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
271 struct ieee80211_mgmt
*mgmt
;
273 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
275 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
276 "deauth/disassoc frame\n", sdata
->name
);
279 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
281 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
283 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
284 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
285 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
286 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
288 /* u.deauth.reason_code == u.disassoc.reason_code */
289 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
291 if (stype
== IEEE80211_STYPE_DEAUTH
)
293 __cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
295 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
298 __cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
300 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
301 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
302 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
305 ieee80211_tx_skb(sdata
, skb
);
310 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
311 struct ieee80211_sub_if_data
*sdata
)
313 struct ieee80211_pspoll
*pspoll
;
316 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
320 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
321 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
323 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
324 ieee80211_tx_skb(sdata
, skb
);
327 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
328 struct ieee80211_sub_if_data
*sdata
,
332 struct ieee80211_hdr_3addr
*nullfunc
;
334 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
338 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
340 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
342 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
343 ieee80211_tx_skb(sdata
, skb
);
346 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
347 struct ieee80211_sub_if_data
*sdata
)
350 struct ieee80211_hdr
*nullfunc
;
353 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
356 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
358 printk(KERN_DEBUG
"%s: failed to allocate buffer for 4addr "
359 "nullfunc frame\n", sdata
->name
);
362 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
364 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
365 memset(nullfunc
, 0, 30);
366 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
367 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
368 nullfunc
->frame_control
= fc
;
369 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
370 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
371 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
372 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
374 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
375 ieee80211_tx_skb(sdata
, skb
);
378 /* spectrum management related things */
379 static void ieee80211_chswitch_work(struct work_struct
*work
)
381 struct ieee80211_sub_if_data
*sdata
=
382 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
383 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
385 if (!ieee80211_sdata_running(sdata
))
388 mutex_lock(&ifmgd
->mtx
);
389 if (!ifmgd
->associated
)
392 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
393 if (!sdata
->local
->ops
->channel_switch
) {
394 /* call "hw_config" only if doing sw channel switch */
395 ieee80211_hw_config(sdata
->local
,
396 IEEE80211_CONF_CHANGE_CHANNEL
);
399 /* XXX: shouldn't really modify cfg80211-owned data! */
400 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
402 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
403 IEEE80211_QUEUE_STOP_REASON_CSA
);
405 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
406 mutex_unlock(&ifmgd
->mtx
);
409 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
411 struct ieee80211_sub_if_data
*sdata
;
412 struct ieee80211_if_managed
*ifmgd
;
414 sdata
= vif_to_sdata(vif
);
415 ifmgd
= &sdata
->u
.mgd
;
417 trace_api_chswitch_done(sdata
, success
);
420 * If the channel switch was not successful, stay
421 * around on the old channel. We currently lack
422 * good handling of this situation, possibly we
423 * should just drop the association.
425 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
428 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
430 EXPORT_SYMBOL(ieee80211_chswitch_done
);
432 static void ieee80211_chswitch_timer(unsigned long data
)
434 struct ieee80211_sub_if_data
*sdata
=
435 (struct ieee80211_sub_if_data
*) data
;
436 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
438 if (sdata
->local
->quiescing
) {
439 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
443 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
446 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
447 struct ieee80211_channel_sw_ie
*sw_elem
,
448 struct ieee80211_bss
*bss
,
451 struct cfg80211_bss
*cbss
=
452 container_of((void *)bss
, struct cfg80211_bss
, priv
);
453 struct ieee80211_channel
*new_ch
;
454 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
455 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
456 cbss
->channel
->band
);
458 ASSERT_MGD_MTX(ifmgd
);
460 if (!ifmgd
->associated
)
463 if (sdata
->local
->scanning
)
466 /* Disregard subsequent beacons if we are already running a timer
469 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
472 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
473 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
476 sdata
->local
->csa_channel
= new_ch
;
478 if (sdata
->local
->ops
->channel_switch
) {
479 /* use driver's channel switch callback */
480 struct ieee80211_channel_switch ch_switch
;
481 memset(&ch_switch
, 0, sizeof(ch_switch
));
482 ch_switch
.timestamp
= timestamp
;
484 ch_switch
.block_tx
= true;
485 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
486 IEEE80211_QUEUE_STOP_REASON_CSA
);
488 ch_switch
.channel
= new_ch
;
489 ch_switch
.count
= sw_elem
->count
;
490 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
491 drv_channel_switch(sdata
->local
, &ch_switch
);
495 /* channel switch handled in software */
496 if (sw_elem
->count
<= 1) {
497 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
500 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
501 IEEE80211_QUEUE_STOP_REASON_CSA
);
502 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
503 mod_timer(&ifmgd
->chswitch_timer
,
505 msecs_to_jiffies(sw_elem
->count
*
506 cbss
->beacon_interval
));
510 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
511 u16 capab_info
, u8
*pwr_constr_elem
,
512 u8 pwr_constr_elem_len
)
514 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
516 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
519 /* Power constraint IE length should be 1 octet */
520 if (pwr_constr_elem_len
!= 1)
523 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
524 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
525 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
526 ieee80211_hw_config(sdata
->local
, 0);
530 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
532 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
533 struct ieee80211_local
*local
= sdata
->local
;
534 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
536 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
537 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
538 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
540 local
->disable_dynamic_ps
= false;
541 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
543 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
545 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
547 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
548 struct ieee80211_local
*local
= sdata
->local
;
549 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
551 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
552 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
553 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
555 local
->disable_dynamic_ps
= true;
556 conf
->dynamic_ps_timeout
= 0;
557 del_timer_sync(&local
->dynamic_ps_timer
);
558 ieee80211_queue_work(&local
->hw
,
559 &local
->dynamic_ps_enable_work
);
561 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
564 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
565 struct ieee80211_sub_if_data
*sdata
)
567 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
570 * If we are scanning right now then the parameters will
571 * take effect when scan finishes.
576 if (conf
->dynamic_ps_timeout
> 0 &&
577 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
578 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
579 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
581 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
582 ieee80211_send_nullfunc(local
, sdata
, 1);
584 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
585 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
588 conf
->flags
|= IEEE80211_CONF_PS
;
589 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
593 static void ieee80211_change_ps(struct ieee80211_local
*local
)
595 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
597 if (local
->ps_sdata
) {
598 ieee80211_enable_ps(local
, local
->ps_sdata
);
599 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
600 conf
->flags
&= ~IEEE80211_CONF_PS
;
601 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
602 del_timer_sync(&local
->dynamic_ps_timer
);
603 cancel_work_sync(&local
->dynamic_ps_enable_work
);
607 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
609 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
610 struct sta_info
*sta
= NULL
;
616 if (!mgd
->associated
)
619 if (!mgd
->associated
->beacon_ies
)
622 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
623 IEEE80211_STA_CONNECTION_POLL
))
627 sta
= sta_info_get(sdata
, mgd
->bssid
);
629 sta_flags
= get_sta_flags(sta
);
632 if (!(sta_flags
& WLAN_STA_AUTHORIZED
))
638 /* need to hold RTNL or interface lock */
639 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
641 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
645 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
646 local
->ps_sdata
= NULL
;
650 if (!list_empty(&local
->work_list
)) {
651 local
->ps_sdata
= NULL
;
655 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
656 if (!ieee80211_sdata_running(sdata
))
658 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
659 /* If an AP vif is found, then disable PS
660 * by setting the count to zero thereby setting
666 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
672 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
673 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
677 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
679 beaconint_us
= ieee80211_tu_to_usec(
680 found
->vif
.bss_conf
.beacon_int
);
682 timeout
= local
->dynamic_ps_forced_timeout
;
685 * Go to full PSM if the user configures a very low
686 * latency requirement.
687 * The 2000 second value is there for compatibility
688 * until the PM_QOS_NETWORK_LATENCY is configured
691 if (latency
> (1900 * USEC_PER_MSEC
) &&
692 latency
!= (2000 * USEC_PER_SEC
))
697 local
->dynamic_ps_user_timeout
= timeout
;
698 if (!local
->disable_dynamic_ps
)
699 conf
->dynamic_ps_timeout
=
700 local
->dynamic_ps_user_timeout
;
702 if (beaconint_us
> latency
) {
703 local
->ps_sdata
= NULL
;
705 struct ieee80211_bss
*bss
;
709 bss
= (void *)found
->u
.mgd
.associated
->priv
;
710 dtimper
= bss
->dtim_period
;
712 /* If the TIM IE is invalid, pretend the value is 1 */
715 else if (dtimper
> 1)
716 maxslp
= min_t(int, dtimper
,
717 latency
/ beaconint_us
);
719 local
->hw
.conf
.max_sleep_period
= maxslp
;
720 local
->hw
.conf
.ps_dtim_period
= dtimper
;
721 local
->ps_sdata
= found
;
724 local
->ps_sdata
= NULL
;
728 ieee80211_change_ps(local
);
731 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
733 struct ieee80211_local
*local
=
734 container_of(work
, struct ieee80211_local
,
735 dynamic_ps_disable_work
);
737 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
738 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
739 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
742 ieee80211_wake_queues_by_reason(&local
->hw
,
743 IEEE80211_QUEUE_STOP_REASON_PS
);
746 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
748 struct ieee80211_local
*local
=
749 container_of(work
, struct ieee80211_local
,
750 dynamic_ps_enable_work
);
751 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
752 struct ieee80211_if_managed
*ifmgd
;
756 /* can only happen when PS was just disabled anyway */
760 ifmgd
= &sdata
->u
.mgd
;
762 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
765 if (!local
->disable_dynamic_ps
&&
766 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
767 /* don't enter PS if TX frames are pending */
768 if (drv_tx_frames_pending(local
)) {
769 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
771 local
->hw
.conf
.dynamic_ps_timeout
));
776 * transmission can be stopped by others which leads to
777 * dynamic_ps_timer expiry. Postpone the ps timer if it
778 * is not the actual idle state.
780 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
781 for (q
= 0; q
< local
->hw
.queues
; q
++) {
782 if (local
->queue_stop_reasons
[q
]) {
783 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
785 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
787 local
->hw
.conf
.dynamic_ps_timeout
));
791 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
794 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
795 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
))) {
796 netif_tx_stop_all_queues(sdata
->dev
);
798 if (drv_tx_frames_pending(local
))
799 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
801 local
->hw
.conf
.dynamic_ps_timeout
));
803 ieee80211_send_nullfunc(local
, sdata
, 1);
804 /* Flush to get the tx status of nullfunc frame */
805 drv_flush(local
, false);
809 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
810 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
811 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
812 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
813 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
814 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
817 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
818 netif_tx_wake_all_queues(sdata
->dev
);
821 void ieee80211_dynamic_ps_timer(unsigned long data
)
823 struct ieee80211_local
*local
= (void *) data
;
825 if (local
->quiescing
|| local
->suspended
)
828 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
832 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
833 struct ieee80211_sub_if_data
*sdata
,
834 u8
*wmm_param
, size_t wmm_param_len
)
836 struct ieee80211_tx_queue_params params
;
837 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
840 u8
*pos
, uapsd_queues
= 0;
842 if (!local
->ops
->conf_tx
)
845 if (local
->hw
.queues
< 4)
851 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
854 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
855 uapsd_queues
= local
->uapsd_queues
;
857 count
= wmm_param
[6] & 0x0f;
858 if (count
== ifmgd
->wmm_last_param_set
)
860 ifmgd
->wmm_last_param_set
= count
;
863 left
= wmm_param_len
- 8;
865 memset(¶ms
, 0, sizeof(params
));
868 for (; left
>= 4; left
-= 4, pos
+= 4) {
869 int aci
= (pos
[0] >> 5) & 0x03;
870 int acm
= (pos
[0] >> 4) & 0x01;
878 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
879 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
885 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
886 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
892 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
893 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
900 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
901 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
906 params
.aifs
= pos
[0] & 0x0f;
907 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
908 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
909 params
.txop
= get_unaligned_le16(pos
+ 2);
910 params
.uapsd
= uapsd
;
912 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
913 wiphy_debug(local
->hw
.wiphy
,
914 "WMM queue=%d aci=%d acm=%d aifs=%d "
915 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
917 params
.aifs
, params
.cw_min
, params
.cw_max
,
918 params
.txop
, params
.uapsd
);
920 local
->tx_conf
[queue
] = params
;
921 if (drv_conf_tx(local
, queue
, ¶ms
))
922 wiphy_debug(local
->hw
.wiphy
,
923 "failed to set TX queue parameters for queue %d\n",
927 /* enable WMM or activate new settings */
928 sdata
->vif
.bss_conf
.qos
= true;
929 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
932 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
933 u16 capab
, bool erp_valid
, u8 erp
)
935 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
938 bool use_short_preamble
;
942 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
943 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
945 use_protection
= false;
946 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
949 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
950 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
951 use_short_slot
= true;
953 if (use_protection
!= bss_conf
->use_cts_prot
) {
954 bss_conf
->use_cts_prot
= use_protection
;
955 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
958 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
959 bss_conf
->use_short_preamble
= use_short_preamble
;
960 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
963 if (use_short_slot
!= bss_conf
->use_short_slot
) {
964 bss_conf
->use_short_slot
= use_short_slot
;
965 changed
|= BSS_CHANGED_ERP_SLOT
;
971 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
972 struct cfg80211_bss
*cbss
,
973 u32 bss_info_changed
)
975 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
976 struct ieee80211_local
*local
= sdata
->local
;
977 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
979 bss_info_changed
|= BSS_CHANGED_ASSOC
;
980 /* set timing information */
981 bss_conf
->beacon_int
= cbss
->beacon_interval
;
982 bss_conf
->timestamp
= cbss
->tsf
;
984 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
985 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
986 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
988 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
989 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
991 sdata
->u
.mgd
.associated
= cbss
;
992 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
994 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
996 /* just to be sure */
997 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
998 IEEE80211_STA_BEACON_POLL
);
1000 ieee80211_led_assoc(local
, 1);
1002 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1003 bss_conf
->dtim_period
= bss
->dtim_period
;
1005 bss_conf
->dtim_period
= 0;
1007 bss_conf
->assoc
= 1;
1009 * For now just always ask the driver to update the basic rateset
1010 * when we have associated, we aren't checking whether it actually
1013 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1015 /* And the BSSID changed - we're associated now */
1016 bss_info_changed
|= BSS_CHANGED_BSSID
;
1018 /* Tell the driver to monitor connection quality (if supported) */
1019 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1020 bss_conf
->cqm_rssi_thold
)
1021 bss_info_changed
|= BSS_CHANGED_CQM
;
1023 /* Enable ARP filtering */
1024 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1025 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1026 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1029 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1031 mutex_lock(&local
->iflist_mtx
);
1032 ieee80211_recalc_ps(local
, -1);
1033 ieee80211_recalc_smps(local
);
1034 mutex_unlock(&local
->iflist_mtx
);
1036 netif_tx_start_all_queues(sdata
->dev
);
1037 netif_carrier_on(sdata
->dev
);
1040 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1041 bool remove_sta
, bool tx
)
1043 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1044 struct ieee80211_local
*local
= sdata
->local
;
1045 struct sta_info
*sta
;
1046 u32 changed
= 0, config_changed
= 0;
1049 ASSERT_MGD_MTX(ifmgd
);
1051 if (WARN_ON(!ifmgd
->associated
))
1054 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1056 ifmgd
->associated
= NULL
;
1057 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1060 * we need to commit the associated = NULL change because the
1061 * scan code uses that to determine whether this iface should
1062 * go to/wake up from powersave or not -- and could otherwise
1063 * wake the queues erroneously.
1068 * Thus, we can only afterwards stop the queues -- to account
1069 * for the case where another CPU is finishing a scan at this
1070 * time -- we don't want the scan code to enable queues.
1073 netif_tx_stop_all_queues(sdata
->dev
);
1074 netif_carrier_off(sdata
->dev
);
1076 mutex_lock(&local
->sta_mtx
);
1077 sta
= sta_info_get(sdata
, bssid
);
1079 set_sta_flags(sta
, WLAN_STA_BLOCK_BA
);
1080 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1082 mutex_unlock(&local
->sta_mtx
);
1084 changed
|= ieee80211_reset_erp_info(sdata
);
1086 ieee80211_led_assoc(local
, 0);
1087 changed
|= BSS_CHANGED_ASSOC
;
1088 sdata
->vif
.bss_conf
.assoc
= false;
1090 ieee80211_set_wmm_default(sdata
);
1092 /* channel(_type) changes are handled by ieee80211_hw_config */
1093 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1095 /* on the next assoc, re-program HT parameters */
1096 sdata
->ht_opmode_valid
= false;
1098 local
->power_constr_level
= 0;
1100 del_timer_sync(&local
->dynamic_ps_timer
);
1101 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1103 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1104 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1105 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1107 local
->ps_sdata
= NULL
;
1109 ieee80211_hw_config(local
, config_changed
);
1111 /* Disable ARP filtering */
1112 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1113 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1114 changed
|= BSS_CHANGED_ARP_FILTER
;
1117 /* The BSSID (not really interesting) and HT changed */
1118 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1119 ieee80211_bss_info_change_notify(sdata
, changed
);
1122 sta_info_destroy_addr(sdata
, bssid
);
1124 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1125 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1126 del_timer_sync(&sdata
->u
.mgd
.timer
);
1127 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1130 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1131 struct ieee80211_hdr
*hdr
)
1134 * We can postpone the mgd.timer whenever receiving unicast frames
1135 * from AP because we know that the connection is working both ways
1136 * at that time. But multicast frames (and hence also beacons) must
1137 * be ignored here, because we need to trigger the timer during
1138 * data idle periods for sending the periodic probe request to the
1139 * AP we're connected to.
1141 if (is_multicast_ether_addr(hdr
->addr1
))
1144 ieee80211_sta_reset_conn_monitor(sdata
);
1147 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1149 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1151 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1152 IEEE80211_STA_CONNECTION_POLL
)))
1155 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1156 IEEE80211_STA_BEACON_POLL
);
1157 mutex_lock(&sdata
->local
->iflist_mtx
);
1158 ieee80211_recalc_ps(sdata
->local
, -1);
1159 mutex_unlock(&sdata
->local
->iflist_mtx
);
1161 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1165 * We've received a probe response, but are not sure whether
1166 * we have or will be receiving any beacons or data, so let's
1167 * schedule the timers again, just in case.
1169 ieee80211_sta_reset_beacon_monitor(sdata
);
1171 mod_timer(&ifmgd
->conn_mon_timer
,
1172 round_jiffies_up(jiffies
+
1173 IEEE80211_CONNECTION_IDLE_TIME
));
1176 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1177 struct ieee80211_hdr
*hdr
, bool ack
)
1179 if (!ieee80211_is_data(hdr
->frame_control
))
1183 ieee80211_sta_reset_conn_monitor(sdata
);
1185 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1186 sdata
->u
.mgd
.probe_send_count
> 0) {
1188 sdata
->u
.mgd
.probe_send_count
= 0;
1190 sdata
->u
.mgd
.nullfunc_failed
= true;
1191 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1195 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1197 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1199 u8
*dst
= ifmgd
->associated
->bssid
;
1200 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1203 * Try sending broadcast probe requests for the last three
1204 * probe requests after the first ones failed since some
1205 * buggy APs only support broadcast probe requests.
1207 if (ifmgd
->probe_send_count
>= unicast_limit
)
1211 * When the hardware reports an accurate Tx ACK status, it's
1212 * better to send a nullfunc frame instead of a probe request,
1213 * as it will kick us off the AP quickly if we aren't associated
1214 * anymore. The timeout will be reset if the frame is ACKed by
1217 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1218 ifmgd
->nullfunc_failed
= false;
1219 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1221 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1222 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1226 ifmgd
->probe_send_count
++;
1227 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1228 run_again(ifmgd
, ifmgd
->probe_timeout
);
1231 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1234 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1235 bool already
= false;
1237 if (!ieee80211_sdata_running(sdata
))
1240 if (sdata
->local
->scanning
)
1243 if (sdata
->local
->tmp_channel
)
1246 mutex_lock(&ifmgd
->mtx
);
1248 if (!ifmgd
->associated
)
1251 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1252 if (beacon
&& net_ratelimit())
1253 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1254 "- sending probe request\n", sdata
->name
);
1258 * The driver/our work has already reported this event or the
1259 * connection monitoring has kicked in and we have already sent
1260 * a probe request. Or maybe the AP died and the driver keeps
1261 * reporting until we disassociate...
1263 * In either case we have to ignore the current call to this
1264 * function (except for setting the correct probe reason bit)
1265 * because otherwise we would reset the timer every time and
1266 * never check whether we received a probe response!
1268 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1269 IEEE80211_STA_CONNECTION_POLL
))
1273 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1275 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1280 mutex_lock(&sdata
->local
->iflist_mtx
);
1281 ieee80211_recalc_ps(sdata
->local
, -1);
1282 mutex_unlock(&sdata
->local
->iflist_mtx
);
1284 ifmgd
->probe_send_count
= 0;
1285 ieee80211_mgd_probe_ap_send(sdata
);
1287 mutex_unlock(&ifmgd
->mtx
);
1290 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1291 struct ieee80211_vif
*vif
)
1293 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1294 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1295 struct sk_buff
*skb
;
1298 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1301 ASSERT_MGD_MTX(ifmgd
);
1303 if (!ifmgd
->associated
)
1306 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1307 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1308 ssid
+ 2, ssid
[1], NULL
, 0, true);
1312 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1314 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1316 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1317 struct ieee80211_local
*local
= sdata
->local
;
1320 mutex_lock(&ifmgd
->mtx
);
1321 if (!ifmgd
->associated
) {
1322 mutex_unlock(&ifmgd
->mtx
);
1326 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1328 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1329 sdata
->name
, bssid
);
1331 ieee80211_set_disassoc(sdata
, true, true);
1332 mutex_unlock(&ifmgd
->mtx
);
1334 mutex_lock(&local
->mtx
);
1335 ieee80211_recalc_idle(local
);
1336 mutex_unlock(&local
->mtx
);
1338 * must be outside lock due to cfg80211,
1339 * but that's not a problem.
1341 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1342 IEEE80211_STYPE_DEAUTH
,
1343 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1347 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1349 struct ieee80211_sub_if_data
*sdata
=
1350 container_of(work
, struct ieee80211_sub_if_data
,
1351 u
.mgd
.beacon_connection_loss_work
);
1353 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1354 __ieee80211_connection_loss(sdata
);
1356 ieee80211_mgd_probe_ap(sdata
, true);
1359 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1361 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1362 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1364 trace_api_beacon_loss(sdata
);
1366 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1367 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1369 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1371 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1373 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1374 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1376 trace_api_connection_loss(sdata
);
1378 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1379 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1381 EXPORT_SYMBOL(ieee80211_connection_loss
);
1384 static enum rx_mgmt_action __must_check
1385 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1386 struct ieee80211_mgmt
*mgmt
, size_t len
)
1388 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1389 const u8
*bssid
= NULL
;
1393 return RX_MGMT_NONE
;
1395 ASSERT_MGD_MTX(ifmgd
);
1397 bssid
= ifmgd
->associated
->bssid
;
1399 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1401 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1402 sdata
->name
, bssid
, reason_code
);
1404 ieee80211_set_disassoc(sdata
, true, false);
1405 mutex_lock(&sdata
->local
->mtx
);
1406 ieee80211_recalc_idle(sdata
->local
);
1407 mutex_unlock(&sdata
->local
->mtx
);
1409 return RX_MGMT_CFG80211_DEAUTH
;
1413 static enum rx_mgmt_action __must_check
1414 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1415 struct ieee80211_mgmt
*mgmt
, size_t len
)
1417 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1421 return RX_MGMT_NONE
;
1423 ASSERT_MGD_MTX(ifmgd
);
1425 if (WARN_ON(!ifmgd
->associated
))
1426 return RX_MGMT_NONE
;
1428 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1429 return RX_MGMT_NONE
;
1431 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1433 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1434 sdata
->name
, mgmt
->sa
, reason_code
);
1436 ieee80211_set_disassoc(sdata
, true, false);
1437 mutex_lock(&sdata
->local
->mtx
);
1438 ieee80211_recalc_idle(sdata
->local
);
1439 mutex_unlock(&sdata
->local
->mtx
);
1440 return RX_MGMT_CFG80211_DISASSOC
;
1444 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1445 struct ieee80211_mgmt
*mgmt
, size_t len
)
1447 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1448 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1449 struct ieee80211_local
*local
= sdata
->local
;
1450 struct ieee80211_supported_band
*sband
;
1451 struct sta_info
*sta
;
1452 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1454 u32 rates
, basic_rates
;
1455 u16 capab_info
, aid
;
1456 struct ieee802_11_elems elems
;
1457 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1460 bool have_higher_than_11mbit
= false;
1461 u16 ap_ht_cap_flags
;
1463 /* AssocResp and ReassocResp have identical structure */
1465 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1466 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1468 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1469 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1470 "set\n", sdata
->name
, aid
);
1471 aid
&= ~(BIT(15) | BIT(14));
1473 pos
= mgmt
->u
.assoc_resp
.variable
;
1474 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1476 if (!elems
.supp_rates
) {
1477 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1484 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
1486 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1487 " the AP\n", sdata
->name
);
1491 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
|
1493 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1494 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1498 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1500 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1501 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1502 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1505 have_higher_than_11mbit
= true;
1507 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1508 if (sband
->bitrates
[j
].bitrate
== rate
) {
1511 basic_rates
|= BIT(j
);
1517 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1518 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1519 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1522 have_higher_than_11mbit
= true;
1524 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1525 if (sband
->bitrates
[j
].bitrate
== rate
) {
1528 basic_rates
|= BIT(j
);
1534 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1535 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1537 /* cf. IEEE 802.11 9.2.12 */
1538 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1539 have_higher_than_11mbit
)
1540 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1542 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1544 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1545 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1546 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1548 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1550 rate_control_rate_init(sta
);
1552 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1553 set_sta_flags(sta
, WLAN_STA_MFP
);
1555 if (elems
.wmm_param
)
1556 set_sta_flags(sta
, WLAN_STA_WME
);
1558 err
= sta_info_insert(sta
);
1561 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1562 " the AP (error %d)\n", sdata
->name
, err
);
1567 * Always handle WMM once after association regardless
1568 * of the first value the AP uses. Setting -1 here has
1569 * that effect because the AP values is an unsigned
1572 ifmgd
->wmm_last_param_set
= -1;
1574 if (elems
.wmm_param
)
1575 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1576 elems
.wmm_param_len
);
1578 ieee80211_set_wmm_default(sdata
);
1580 local
->oper_channel
= wk
->chan
;
1582 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1583 (sdata
->local
->hw
.queues
>= 4) &&
1584 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1585 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1586 cbss
->bssid
, ap_ht_cap_flags
);
1588 /* set AID and assoc capability,
1589 * ieee80211_set_associated() will tell the driver */
1590 bss_conf
->aid
= aid
;
1591 bss_conf
->assoc_capability
= capab_info
;
1592 ieee80211_set_associated(sdata
, cbss
, changed
);
1595 * If we're using 4-addr mode, let the AP know that we're
1596 * doing so, so that it can create the STA VLAN on its side
1598 if (ifmgd
->use_4addr
)
1599 ieee80211_send_4addr_nullfunc(local
, sdata
);
1602 * Start timer to probe the connection to the AP now.
1603 * Also start the timer that will detect beacon loss.
1605 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1606 ieee80211_sta_reset_beacon_monitor(sdata
);
1612 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1613 struct ieee80211_mgmt
*mgmt
,
1615 struct ieee80211_rx_status
*rx_status
,
1616 struct ieee802_11_elems
*elems
,
1619 struct ieee80211_local
*local
= sdata
->local
;
1621 struct ieee80211_bss
*bss
;
1622 struct ieee80211_channel
*channel
;
1623 bool need_ps
= false;
1625 if (sdata
->u
.mgd
.associated
) {
1626 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1627 /* not previously set so we may need to recalc */
1628 need_ps
= !bss
->dtim_period
;
1631 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1632 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1635 freq
= rx_status
->freq
;
1637 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1639 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1642 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1645 ieee80211_rx_bss_put(local
, bss
);
1647 if (!sdata
->u
.mgd
.associated
)
1651 mutex_lock(&local
->iflist_mtx
);
1652 ieee80211_recalc_ps(local
, -1);
1653 mutex_unlock(&local
->iflist_mtx
);
1656 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1657 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1659 struct ieee80211_channel_sw_ie
*sw_elem
=
1660 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1661 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1662 bss
, rx_status
->mactime
);
1667 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1668 struct sk_buff
*skb
)
1670 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1671 struct ieee80211_if_managed
*ifmgd
;
1672 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1673 size_t baselen
, len
= skb
->len
;
1674 struct ieee802_11_elems elems
;
1676 ifmgd
= &sdata
->u
.mgd
;
1678 ASSERT_MGD_MTX(ifmgd
);
1680 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1681 return; /* ignore ProbeResp to foreign address */
1683 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1687 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1690 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1692 if (ifmgd
->associated
&&
1693 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1694 ieee80211_reset_ap_probe(sdata
);
1698 * This is the canonical list of information elements we care about,
1699 * the filter code also gives us all changes to the Microsoft OUI
1700 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1702 * We implement beacon filtering in software since that means we can
1703 * avoid processing the frame here and in cfg80211, and userspace
1704 * will not be able to tell whether the hardware supports it or not.
1706 * XXX: This list needs to be dynamic -- userspace needs to be able to
1707 * add items it requires. It also needs to be able to tell us to
1708 * look out for other vendor IEs.
1710 static const u64 care_about_ies
=
1711 (1ULL << WLAN_EID_COUNTRY
) |
1712 (1ULL << WLAN_EID_ERP_INFO
) |
1713 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1714 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1715 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1716 (1ULL << WLAN_EID_HT_INFORMATION
);
1718 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1719 struct ieee80211_mgmt
*mgmt
,
1721 struct ieee80211_rx_status
*rx_status
)
1723 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1724 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1726 struct ieee802_11_elems elems
;
1727 struct ieee80211_local
*local
= sdata
->local
;
1729 bool erp_valid
, directed_tim
= false;
1734 ASSERT_MGD_MTX(ifmgd
);
1736 /* Process beacon from the current BSS */
1737 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1741 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1745 * We might have received a number of frames, among them a
1746 * disassoc frame and a beacon...
1748 if (!ifmgd
->associated
)
1751 bssid
= ifmgd
->associated
->bssid
;
1754 * And in theory even frames from a different AP we were just
1755 * associated to a split-second ago!
1757 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1760 /* Track average RSSI from the Beacon frames of the current AP */
1761 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1762 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1763 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1764 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1765 ifmgd
->last_cqm_event_signal
= 0;
1766 ifmgd
->count_beacon_signal
= 1;
1767 ifmgd
->last_ave_beacon_signal
= 0;
1769 ifmgd
->ave_beacon_signal
=
1770 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1771 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1772 ifmgd
->ave_beacon_signal
) / 16;
1773 ifmgd
->count_beacon_signal
++;
1776 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1777 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1778 int sig
= ifmgd
->ave_beacon_signal
;
1779 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1782 * if signal crosses either of the boundaries, invoke callback
1783 * with appropriate parameters
1785 if (sig
> ifmgd
->rssi_max_thold
&&
1786 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1787 ifmgd
->last_ave_beacon_signal
= sig
;
1788 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1789 } else if (sig
< ifmgd
->rssi_min_thold
&&
1790 (last_sig
>= ifmgd
->rssi_max_thold
||
1792 ifmgd
->last_ave_beacon_signal
= sig
;
1793 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1797 if (bss_conf
->cqm_rssi_thold
&&
1798 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1799 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1800 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1801 int last_event
= ifmgd
->last_cqm_event_signal
;
1802 int thold
= bss_conf
->cqm_rssi_thold
;
1803 int hyst
= bss_conf
->cqm_rssi_hyst
;
1805 (last_event
== 0 || sig
< last_event
- hyst
)) {
1806 ifmgd
->last_cqm_event_signal
= sig
;
1807 ieee80211_cqm_rssi_notify(
1809 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1811 } else if (sig
> thold
&&
1812 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1813 ifmgd
->last_cqm_event_signal
= sig
;
1814 ieee80211_cqm_rssi_notify(
1816 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1821 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1822 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1823 if (net_ratelimit()) {
1824 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1825 "to a received beacon\n", sdata
->name
);
1828 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1829 mutex_lock(&local
->iflist_mtx
);
1830 ieee80211_recalc_ps(local
, -1);
1831 mutex_unlock(&local
->iflist_mtx
);
1835 * Push the beacon loss detection into the future since
1836 * we are processing a beacon from the AP just now.
1838 ieee80211_sta_reset_beacon_monitor(sdata
);
1840 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1841 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1842 len
- baselen
, &elems
,
1843 care_about_ies
, ncrc
);
1845 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1846 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1849 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1850 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1853 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1854 elems
.wmm_param_len
);
1857 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1859 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1860 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1861 ieee80211_hw_config(local
,
1862 IEEE80211_CONF_CHANGE_PS
);
1863 ieee80211_send_nullfunc(local
, sdata
, 0);
1865 local
->pspolling
= true;
1868 * Here is assumed that the driver will be
1869 * able to send ps-poll frame and receive a
1870 * response even though power save mode is
1871 * enabled, but some drivers might require
1872 * to disable power save here. This needs
1873 * to be investigated.
1875 ieee80211_send_pspoll(local
, sdata
);
1880 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1882 ifmgd
->beacon_crc
= ncrc
;
1883 ifmgd
->beacon_crc_valid
= true;
1885 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1887 erp_value
= elems
.erp_info
[0];
1891 changed
|= ieee80211_handle_bss_capability(sdata
,
1892 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1893 erp_valid
, erp_value
);
1896 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1897 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1898 struct sta_info
*sta
;
1899 struct ieee80211_supported_band
*sband
;
1900 u16 ap_ht_cap_flags
;
1904 sta
= sta_info_get(sdata
, bssid
);
1905 if (WARN_ON(!sta
)) {
1910 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1912 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1913 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1915 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1919 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1920 bssid
, ap_ht_cap_flags
);
1923 /* Note: country IE parsing is done for us by cfg80211 */
1924 if (elems
.country_elem
) {
1925 /* TODO: IBSS also needs this */
1926 if (elems
.pwr_constr_elem
)
1927 ieee80211_handle_pwr_constr(sdata
,
1928 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1929 elems
.pwr_constr_elem
,
1930 elems
.pwr_constr_elem_len
);
1933 ieee80211_bss_info_change_notify(sdata
, changed
);
1936 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1937 struct sk_buff
*skb
)
1939 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1940 struct ieee80211_rx_status
*rx_status
;
1941 struct ieee80211_mgmt
*mgmt
;
1942 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1945 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1946 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1947 fc
= le16_to_cpu(mgmt
->frame_control
);
1949 mutex_lock(&ifmgd
->mtx
);
1951 if (ifmgd
->associated
&&
1952 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
1953 switch (fc
& IEEE80211_FCTL_STYPE
) {
1954 case IEEE80211_STYPE_BEACON
:
1955 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1958 case IEEE80211_STYPE_PROBE_RESP
:
1959 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
1961 case IEEE80211_STYPE_DEAUTH
:
1962 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1964 case IEEE80211_STYPE_DISASSOC
:
1965 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1967 case IEEE80211_STYPE_ACTION
:
1968 switch (mgmt
->u
.action
.category
) {
1969 case WLAN_CATEGORY_SPECTRUM_MGMT
:
1970 ieee80211_sta_process_chanswitch(sdata
,
1971 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1972 (void *)ifmgd
->associated
->priv
,
1973 rx_status
->mactime
);
1977 mutex_unlock(&ifmgd
->mtx
);
1983 case RX_MGMT_CFG80211_DEAUTH
:
1984 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1986 case RX_MGMT_CFG80211_DISASSOC
:
1987 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1990 WARN(1, "unexpected: %d", rma
);
1995 mutex_unlock(&ifmgd
->mtx
);
1997 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
1998 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
1999 struct ieee80211_local
*local
= sdata
->local
;
2000 struct ieee80211_work
*wk
;
2002 mutex_lock(&local
->mtx
);
2003 list_for_each_entry(wk
, &local
->work_list
, list
) {
2004 if (wk
->sdata
!= sdata
)
2007 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2008 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2011 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2013 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2017 * Printing the message only here means we can't
2018 * spuriously print it, but it also means that it
2019 * won't be printed when the frame comes in before
2020 * we even tried to associate or in similar cases.
2022 * Ultimately, I suspect cfg80211 should print the
2026 "%s: deauthenticated from %pM (Reason: %u)\n",
2027 sdata
->name
, mgmt
->bssid
,
2028 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2030 list_del_rcu(&wk
->list
);
2034 mutex_unlock(&local
->mtx
);
2036 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2040 static void ieee80211_sta_timer(unsigned long data
)
2042 struct ieee80211_sub_if_data
*sdata
=
2043 (struct ieee80211_sub_if_data
*) data
;
2044 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2045 struct ieee80211_local
*local
= sdata
->local
;
2047 if (local
->quiescing
) {
2048 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2052 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2055 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2056 u8
*bssid
, u8 reason
)
2058 struct ieee80211_local
*local
= sdata
->local
;
2059 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2061 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2062 IEEE80211_STA_BEACON_POLL
);
2064 ieee80211_set_disassoc(sdata
, true, true);
2065 mutex_unlock(&ifmgd
->mtx
);
2066 mutex_lock(&local
->mtx
);
2067 ieee80211_recalc_idle(local
);
2068 mutex_unlock(&local
->mtx
);
2070 * must be outside lock due to cfg80211,
2071 * but that's not a problem.
2073 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2074 IEEE80211_STYPE_DEAUTH
, reason
,
2076 mutex_lock(&ifmgd
->mtx
);
2079 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2081 struct ieee80211_local
*local
= sdata
->local
;
2082 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2084 /* then process the rest of the work */
2085 mutex_lock(&ifmgd
->mtx
);
2087 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2088 IEEE80211_STA_CONNECTION_POLL
) &&
2089 ifmgd
->associated
) {
2093 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2095 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2096 max_tries
= max_nullfunc_tries
;
2098 max_tries
= max_probe_tries
;
2100 /* ACK received for nullfunc probing frame */
2101 if (!ifmgd
->probe_send_count
)
2102 ieee80211_reset_ap_probe(sdata
);
2103 else if (ifmgd
->nullfunc_failed
) {
2104 if (ifmgd
->probe_send_count
< max_tries
) {
2105 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2106 wiphy_debug(local
->hw
.wiphy
,
2107 "%s: No ack for nullfunc frame to"
2108 " AP %pM, try %d/%i\n",
2110 ifmgd
->probe_send_count
, max_tries
);
2112 ieee80211_mgd_probe_ap_send(sdata
);
2114 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2115 wiphy_debug(local
->hw
.wiphy
,
2116 "%s: No ack for nullfunc frame to"
2117 " AP %pM, disconnecting.\n",
2118 sdata
->name
, bssid
);
2120 ieee80211_sta_connection_lost(sdata
, bssid
,
2121 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2123 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2124 run_again(ifmgd
, ifmgd
->probe_timeout
);
2125 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2126 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2127 wiphy_debug(local
->hw
.wiphy
,
2128 "%s: Failed to send nullfunc to AP %pM"
2129 " after %dms, disconnecting.\n",
2131 bssid
, probe_wait_ms
);
2133 ieee80211_sta_connection_lost(sdata
, bssid
,
2134 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2135 } else if (ifmgd
->probe_send_count
< max_tries
) {
2136 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2137 wiphy_debug(local
->hw
.wiphy
,
2138 "%s: No probe response from AP %pM"
2139 " after %dms, try %d/%i\n",
2141 bssid
, probe_wait_ms
,
2142 ifmgd
->probe_send_count
, max_tries
);
2144 ieee80211_mgd_probe_ap_send(sdata
);
2147 * We actually lost the connection ... or did we?
2150 wiphy_debug(local
->hw
.wiphy
,
2151 "%s: No probe response from AP %pM"
2152 " after %dms, disconnecting.\n",
2154 bssid
, probe_wait_ms
);
2156 ieee80211_sta_connection_lost(sdata
, bssid
,
2157 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2161 mutex_unlock(&ifmgd
->mtx
);
2164 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2166 struct ieee80211_sub_if_data
*sdata
=
2167 (struct ieee80211_sub_if_data
*) data
;
2168 struct ieee80211_local
*local
= sdata
->local
;
2170 if (local
->quiescing
)
2173 ieee80211_queue_work(&sdata
->local
->hw
,
2174 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2177 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2179 struct ieee80211_sub_if_data
*sdata
=
2180 (struct ieee80211_sub_if_data
*) data
;
2181 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2182 struct ieee80211_local
*local
= sdata
->local
;
2184 if (local
->quiescing
)
2187 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2190 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2192 struct ieee80211_sub_if_data
*sdata
=
2193 container_of(work
, struct ieee80211_sub_if_data
,
2194 u
.mgd
.monitor_work
);
2196 ieee80211_mgd_probe_ap(sdata
, false);
2199 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2201 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2202 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2203 IEEE80211_STA_CONNECTION_POLL
);
2205 /* let's probe the connection once */
2206 ieee80211_queue_work(&sdata
->local
->hw
,
2207 &sdata
->u
.mgd
.monitor_work
);
2208 /* and do all the other regular work too */
2209 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2214 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2216 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2219 * we need to use atomic bitops for the running bits
2220 * only because both timers might fire at the same
2221 * time -- the code here is properly synchronised.
2224 cancel_work_sync(&ifmgd
->request_smps_work
);
2226 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2227 if (del_timer_sync(&ifmgd
->timer
))
2228 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2230 cancel_work_sync(&ifmgd
->chswitch_work
);
2231 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2232 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2234 cancel_work_sync(&ifmgd
->monitor_work
);
2235 /* these will just be re-established on connection */
2236 del_timer_sync(&ifmgd
->conn_mon_timer
);
2237 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2240 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2242 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2244 if (!ifmgd
->associated
)
2247 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2248 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2249 mutex_lock(&ifmgd
->mtx
);
2250 if (ifmgd
->associated
) {
2251 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2252 wiphy_debug(sdata
->local
->hw
.wiphy
,
2253 "%s: driver requested disconnect after resume.\n",
2256 ieee80211_sta_connection_lost(sdata
,
2257 ifmgd
->associated
->bssid
,
2258 WLAN_REASON_UNSPECIFIED
);
2259 mutex_unlock(&ifmgd
->mtx
);
2262 mutex_unlock(&ifmgd
->mtx
);
2265 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2266 add_timer(&ifmgd
->timer
);
2267 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2268 add_timer(&ifmgd
->chswitch_timer
);
2269 ieee80211_sta_reset_beacon_monitor(sdata
);
2270 ieee80211_restart_sta_timer(sdata
);
2271 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2275 /* interface setup */
2276 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2278 struct ieee80211_if_managed
*ifmgd
;
2280 ifmgd
= &sdata
->u
.mgd
;
2281 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2282 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2283 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2284 ieee80211_beacon_connection_loss_work
);
2285 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2286 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2287 (unsigned long) sdata
);
2288 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2289 (unsigned long) sdata
);
2290 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2291 (unsigned long) sdata
);
2292 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2293 (unsigned long) sdata
);
2297 mutex_init(&ifmgd
->mtx
);
2299 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2300 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2302 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2305 /* scan finished notification */
2306 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2308 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2310 /* Restart STA timers */
2312 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2313 ieee80211_restart_sta_timer(sdata
);
2317 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2318 unsigned long data
, void *dummy
)
2320 s32 latency_usec
= (s32
) data
;
2321 struct ieee80211_local
*local
=
2322 container_of(nb
, struct ieee80211_local
,
2323 network_latency_notifier
);
2325 mutex_lock(&local
->iflist_mtx
);
2326 ieee80211_recalc_ps(local
, latency_usec
);
2327 mutex_unlock(&local
->iflist_mtx
);
2333 static enum work_done_result
2334 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2335 struct sk_buff
*skb
)
2338 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2339 return WORK_DONE_DESTROY
;
2342 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2343 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2344 return WORK_DONE_DESTROY
;
2347 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2348 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2349 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2351 wk
->type
= IEEE80211_WORK_AUTH
;
2352 wk
->probe_auth
.tries
= 0;
2353 return WORK_DONE_REQUEUE
;
2356 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2357 struct cfg80211_auth_request
*req
)
2360 struct ieee80211_work
*wk
;
2363 if (req
->local_state_change
)
2364 return 0; /* no need to update mac80211 state */
2366 switch (req
->auth_type
) {
2367 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2368 auth_alg
= WLAN_AUTH_OPEN
;
2370 case NL80211_AUTHTYPE_SHARED_KEY
:
2371 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2373 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2375 case NL80211_AUTHTYPE_FT
:
2376 auth_alg
= WLAN_AUTH_FT
;
2378 case NL80211_AUTHTYPE_NETWORK_EAP
:
2379 auth_alg
= WLAN_AUTH_LEAP
;
2385 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2389 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2391 if (req
->ie
&& req
->ie_len
) {
2392 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2393 wk
->ie_len
= req
->ie_len
;
2396 if (req
->key
&& req
->key_len
) {
2397 wk
->probe_auth
.key_len
= req
->key_len
;
2398 wk
->probe_auth
.key_idx
= req
->key_idx
;
2399 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2402 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2403 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2404 wk
->probe_auth
.ssid_len
= ssid
[1];
2406 wk
->probe_auth
.algorithm
= auth_alg
;
2407 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2409 /* if we already have a probe, don't probe again */
2410 if (req
->bss
->proberesp_ies
)
2411 wk
->type
= IEEE80211_WORK_AUTH
;
2413 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2414 wk
->chan
= req
->bss
->channel
;
2415 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2417 wk
->done
= ieee80211_probe_auth_done
;
2419 ieee80211_add_work(wk
);
2423 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2424 struct sk_buff
*skb
)
2426 struct ieee80211_mgmt
*mgmt
;
2427 struct ieee80211_rx_status
*rx_status
;
2428 struct ieee802_11_elems elems
;
2432 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2433 return WORK_DONE_DESTROY
;
2436 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2437 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2438 rx_status
= (void *) skb
->cb
;
2439 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2440 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2442 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2444 wk
->type
= IEEE80211_WORK_ASSOC
;
2445 /* not really done yet */
2446 return WORK_DONE_REQUEUE
;
2449 mgmt
= (void *)skb
->data
;
2450 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2452 if (status
== WLAN_STATUS_SUCCESS
) {
2453 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2454 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2455 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2456 /* oops -- internal error -- send timeout for now */
2457 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2459 return WORK_DONE_DESTROY
;
2462 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2465 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2466 return WORK_DONE_DESTROY
;
2469 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2470 struct cfg80211_assoc_request
*req
)
2472 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2473 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2474 struct ieee80211_work
*wk
;
2478 mutex_lock(&ifmgd
->mtx
);
2479 if (ifmgd
->associated
) {
2480 if (!req
->prev_bssid
||
2481 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2484 * We are already associated and the request was not a
2485 * reassociation request from the current BSS, so
2488 mutex_unlock(&ifmgd
->mtx
);
2492 /* Trying to reassociate - clear previous association state */
2493 ieee80211_set_disassoc(sdata
, true, false);
2495 mutex_unlock(&ifmgd
->mtx
);
2497 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2501 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2502 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2504 ifmgd
->beacon_crc_valid
= false;
2506 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2507 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2508 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2509 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2510 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2513 if (req
->ie
&& req
->ie_len
) {
2514 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2515 wk
->ie_len
= req
->ie_len
;
2519 wk
->assoc
.bss
= req
->bss
;
2521 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2523 /* new association always uses requested smps mode */
2524 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2525 if (ifmgd
->powersave
)
2526 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2528 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2530 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2532 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2534 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2535 * We still associate in non-HT mode (11a/b/g) if any one of these
2536 * ciphers is configured as pairwise.
2537 * We can set this to true for non-11n hardware, that'll be checked
2538 * separately along with the peer capabilities.
2540 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2541 wk
->assoc
.capability
= req
->bss
->capability
;
2542 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2543 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2544 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2545 wk
->assoc
.ht_information_ie
=
2546 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2548 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2549 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2550 wk
->assoc
.uapsd_used
= true;
2551 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2553 wk
->assoc
.uapsd_used
= false;
2554 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2557 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2558 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2559 wk
->assoc
.ssid_len
= ssid
[1];
2561 if (req
->prev_bssid
)
2562 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2564 wk
->chan
= req
->bss
->channel
;
2565 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2567 wk
->done
= ieee80211_assoc_done
;
2568 if (!bss
->dtim_period
&&
2569 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2570 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2572 wk
->type
= IEEE80211_WORK_ASSOC
;
2575 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2576 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2578 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2579 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2582 if (req
->crypto
.control_port
)
2583 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2585 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2587 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2588 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2590 ieee80211_add_work(wk
);
2594 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2595 struct cfg80211_deauth_request
*req
,
2598 struct ieee80211_local
*local
= sdata
->local
;
2599 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2600 struct ieee80211_work
*wk
;
2602 bool assoc_bss
= false;
2604 mutex_lock(&ifmgd
->mtx
);
2606 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2607 if (ifmgd
->associated
== req
->bss
) {
2608 ieee80211_set_disassoc(sdata
, false, true);
2609 mutex_unlock(&ifmgd
->mtx
);
2612 bool not_auth_yet
= false;
2614 mutex_unlock(&ifmgd
->mtx
);
2616 mutex_lock(&local
->mtx
);
2617 list_for_each_entry(wk
, &local
->work_list
, list
) {
2618 if (wk
->sdata
!= sdata
)
2621 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2622 wk
->type
!= IEEE80211_WORK_AUTH
&&
2623 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2624 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2627 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2630 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2631 list_del_rcu(&wk
->list
);
2635 mutex_unlock(&local
->mtx
);
2638 * If somebody requests authentication and we haven't
2639 * sent out an auth frame yet there's no need to send
2640 * out a deauth frame either. If the state was PROBE,
2641 * then this is the case. If it's AUTH we have sent a
2642 * frame, and if it's IDLE we have completed the auth
2646 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2651 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2652 sdata
->name
, bssid
, req
->reason_code
);
2654 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2655 req
->reason_code
, cookie
,
2656 !req
->local_state_change
);
2658 sta_info_destroy_addr(sdata
, bssid
);
2660 mutex_lock(&sdata
->local
->mtx
);
2661 ieee80211_recalc_idle(sdata
->local
);
2662 mutex_unlock(&sdata
->local
->mtx
);
2667 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2668 struct cfg80211_disassoc_request
*req
,
2671 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2674 mutex_lock(&ifmgd
->mtx
);
2677 * cfg80211 should catch this ... but it's racy since
2678 * we can receive a disassoc frame, process it, hand it
2679 * to cfg80211 while that's in a locked section already
2680 * trying to tell us that the user wants to disconnect.
2682 if (ifmgd
->associated
!= req
->bss
) {
2683 mutex_unlock(&ifmgd
->mtx
);
2687 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2688 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2690 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2691 ieee80211_set_disassoc(sdata
, false, true);
2693 mutex_unlock(&ifmgd
->mtx
);
2695 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2696 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2697 cookie
, !req
->local_state_change
);
2698 sta_info_destroy_addr(sdata
, bssid
);
2700 mutex_lock(&sdata
->local
->mtx
);
2701 ieee80211_recalc_idle(sdata
->local
);
2702 mutex_unlock(&sdata
->local
->mtx
);
2707 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2708 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2711 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2713 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2715 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2717 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2719 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2721 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2722 return sdata
->dev
->operstate
;
2724 EXPORT_SYMBOL(ieee80211_get_operstate
);