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 if (drv_conf_tx(local
, queue
, ¶ms
))
921 wiphy_debug(local
->hw
.wiphy
,
922 "failed to set TX queue parameters for queue %d\n",
926 /* enable WMM or activate new settings */
927 sdata
->vif
.bss_conf
.qos
= true;
928 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
931 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
932 u16 capab
, bool erp_valid
, u8 erp
)
934 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
937 bool use_short_preamble
;
941 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
942 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
944 use_protection
= false;
945 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
948 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
949 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
950 use_short_slot
= true;
952 if (use_protection
!= bss_conf
->use_cts_prot
) {
953 bss_conf
->use_cts_prot
= use_protection
;
954 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
957 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
958 bss_conf
->use_short_preamble
= use_short_preamble
;
959 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
962 if (use_short_slot
!= bss_conf
->use_short_slot
) {
963 bss_conf
->use_short_slot
= use_short_slot
;
964 changed
|= BSS_CHANGED_ERP_SLOT
;
970 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
971 struct cfg80211_bss
*cbss
,
972 u32 bss_info_changed
)
974 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
975 struct ieee80211_local
*local
= sdata
->local
;
976 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
978 bss_info_changed
|= BSS_CHANGED_ASSOC
;
979 /* set timing information */
980 bss_conf
->beacon_int
= cbss
->beacon_interval
;
981 bss_conf
->timestamp
= cbss
->tsf
;
983 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
984 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
985 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
987 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
988 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
990 sdata
->u
.mgd
.associated
= cbss
;
991 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
993 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
995 /* just to be sure */
996 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
997 IEEE80211_STA_BEACON_POLL
);
999 ieee80211_led_assoc(local
, 1);
1001 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1002 bss_conf
->dtim_period
= bss
->dtim_period
;
1004 bss_conf
->dtim_period
= 0;
1006 bss_conf
->assoc
= 1;
1008 * For now just always ask the driver to update the basic rateset
1009 * when we have associated, we aren't checking whether it actually
1012 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1014 /* And the BSSID changed - we're associated now */
1015 bss_info_changed
|= BSS_CHANGED_BSSID
;
1017 /* Tell the driver to monitor connection quality (if supported) */
1018 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1019 bss_conf
->cqm_rssi_thold
)
1020 bss_info_changed
|= BSS_CHANGED_CQM
;
1022 /* Enable ARP filtering */
1023 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1024 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1025 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1028 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1030 mutex_lock(&local
->iflist_mtx
);
1031 ieee80211_recalc_ps(local
, -1);
1032 ieee80211_recalc_smps(local
);
1033 mutex_unlock(&local
->iflist_mtx
);
1035 netif_tx_start_all_queues(sdata
->dev
);
1036 netif_carrier_on(sdata
->dev
);
1039 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1040 bool remove_sta
, bool tx
)
1042 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1043 struct ieee80211_local
*local
= sdata
->local
;
1044 struct sta_info
*sta
;
1045 u32 changed
= 0, config_changed
= 0;
1048 ASSERT_MGD_MTX(ifmgd
);
1050 if (WARN_ON(!ifmgd
->associated
))
1053 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1055 ifmgd
->associated
= NULL
;
1056 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1059 * we need to commit the associated = NULL change because the
1060 * scan code uses that to determine whether this iface should
1061 * go to/wake up from powersave or not -- and could otherwise
1062 * wake the queues erroneously.
1067 * Thus, we can only afterwards stop the queues -- to account
1068 * for the case where another CPU is finishing a scan at this
1069 * time -- we don't want the scan code to enable queues.
1072 netif_tx_stop_all_queues(sdata
->dev
);
1073 netif_carrier_off(sdata
->dev
);
1075 mutex_lock(&local
->sta_mtx
);
1076 sta
= sta_info_get(sdata
, bssid
);
1078 set_sta_flags(sta
, WLAN_STA_BLOCK_BA
);
1079 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1081 mutex_unlock(&local
->sta_mtx
);
1083 changed
|= ieee80211_reset_erp_info(sdata
);
1085 ieee80211_led_assoc(local
, 0);
1086 changed
|= BSS_CHANGED_ASSOC
;
1087 sdata
->vif
.bss_conf
.assoc
= false;
1089 ieee80211_set_wmm_default(sdata
);
1091 /* channel(_type) changes are handled by ieee80211_hw_config */
1092 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1094 /* on the next assoc, re-program HT parameters */
1095 sdata
->ht_opmode_valid
= false;
1097 local
->power_constr_level
= 0;
1099 del_timer_sync(&local
->dynamic_ps_timer
);
1100 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1102 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1103 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1104 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1106 local
->ps_sdata
= NULL
;
1108 ieee80211_hw_config(local
, config_changed
);
1110 /* Disable ARP filtering */
1111 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1112 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1113 changed
|= BSS_CHANGED_ARP_FILTER
;
1116 /* The BSSID (not really interesting) and HT changed */
1117 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1118 ieee80211_bss_info_change_notify(sdata
, changed
);
1121 sta_info_destroy_addr(sdata
, bssid
);
1123 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1124 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1125 del_timer_sync(&sdata
->u
.mgd
.timer
);
1126 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1129 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1130 struct ieee80211_hdr
*hdr
)
1133 * We can postpone the mgd.timer whenever receiving unicast frames
1134 * from AP because we know that the connection is working both ways
1135 * at that time. But multicast frames (and hence also beacons) must
1136 * be ignored here, because we need to trigger the timer during
1137 * data idle periods for sending the periodic probe request to the
1138 * AP we're connected to.
1140 if (is_multicast_ether_addr(hdr
->addr1
))
1143 ieee80211_sta_reset_conn_monitor(sdata
);
1146 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1148 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1150 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1151 IEEE80211_STA_CONNECTION_POLL
)))
1154 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1155 IEEE80211_STA_BEACON_POLL
);
1156 mutex_lock(&sdata
->local
->iflist_mtx
);
1157 ieee80211_recalc_ps(sdata
->local
, -1);
1158 mutex_unlock(&sdata
->local
->iflist_mtx
);
1160 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1164 * We've received a probe response, but are not sure whether
1165 * we have or will be receiving any beacons or data, so let's
1166 * schedule the timers again, just in case.
1168 ieee80211_sta_reset_beacon_monitor(sdata
);
1170 mod_timer(&ifmgd
->conn_mon_timer
,
1171 round_jiffies_up(jiffies
+
1172 IEEE80211_CONNECTION_IDLE_TIME
));
1175 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1176 struct ieee80211_hdr
*hdr
, bool ack
)
1178 if (!ieee80211_is_data(hdr
->frame_control
))
1182 ieee80211_sta_reset_conn_monitor(sdata
);
1184 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1185 sdata
->u
.mgd
.probe_send_count
> 0) {
1187 sdata
->u
.mgd
.probe_send_count
= 0;
1189 sdata
->u
.mgd
.nullfunc_failed
= true;
1190 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1194 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1196 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1198 u8
*dst
= ifmgd
->associated
->bssid
;
1199 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1202 * Try sending broadcast probe requests for the last three
1203 * probe requests after the first ones failed since some
1204 * buggy APs only support broadcast probe requests.
1206 if (ifmgd
->probe_send_count
>= unicast_limit
)
1210 * When the hardware reports an accurate Tx ACK status, it's
1211 * better to send a nullfunc frame instead of a probe request,
1212 * as it will kick us off the AP quickly if we aren't associated
1213 * anymore. The timeout will be reset if the frame is ACKed by
1216 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1217 ifmgd
->nullfunc_failed
= false;
1218 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1220 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1221 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1225 ifmgd
->probe_send_count
++;
1226 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1227 run_again(ifmgd
, ifmgd
->probe_timeout
);
1230 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1233 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1234 bool already
= false;
1236 if (!ieee80211_sdata_running(sdata
))
1239 if (sdata
->local
->scanning
)
1242 if (sdata
->local
->tmp_channel
)
1245 mutex_lock(&ifmgd
->mtx
);
1247 if (!ifmgd
->associated
)
1250 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1251 if (beacon
&& net_ratelimit())
1252 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1253 "- sending probe request\n", sdata
->name
);
1257 * The driver/our work has already reported this event or the
1258 * connection monitoring has kicked in and we have already sent
1259 * a probe request. Or maybe the AP died and the driver keeps
1260 * reporting until we disassociate...
1262 * In either case we have to ignore the current call to this
1263 * function (except for setting the correct probe reason bit)
1264 * because otherwise we would reset the timer every time and
1265 * never check whether we received a probe response!
1267 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1268 IEEE80211_STA_CONNECTION_POLL
))
1272 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1274 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1279 mutex_lock(&sdata
->local
->iflist_mtx
);
1280 ieee80211_recalc_ps(sdata
->local
, -1);
1281 mutex_unlock(&sdata
->local
->iflist_mtx
);
1283 ifmgd
->probe_send_count
= 0;
1284 ieee80211_mgd_probe_ap_send(sdata
);
1286 mutex_unlock(&ifmgd
->mtx
);
1289 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1290 struct ieee80211_vif
*vif
)
1292 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1293 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1294 struct sk_buff
*skb
;
1297 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1300 ASSERT_MGD_MTX(ifmgd
);
1302 if (!ifmgd
->associated
)
1305 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1306 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1307 ssid
+ 2, ssid
[1], NULL
, 0, true);
1311 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1313 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1315 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1316 struct ieee80211_local
*local
= sdata
->local
;
1319 mutex_lock(&ifmgd
->mtx
);
1320 if (!ifmgd
->associated
) {
1321 mutex_unlock(&ifmgd
->mtx
);
1325 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1327 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1328 sdata
->name
, bssid
);
1330 ieee80211_set_disassoc(sdata
, true, true);
1331 mutex_unlock(&ifmgd
->mtx
);
1333 mutex_lock(&local
->mtx
);
1334 ieee80211_recalc_idle(local
);
1335 mutex_unlock(&local
->mtx
);
1337 * must be outside lock due to cfg80211,
1338 * but that's not a problem.
1340 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1341 IEEE80211_STYPE_DEAUTH
,
1342 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1346 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1348 struct ieee80211_sub_if_data
*sdata
=
1349 container_of(work
, struct ieee80211_sub_if_data
,
1350 u
.mgd
.beacon_connection_loss_work
);
1352 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1353 __ieee80211_connection_loss(sdata
);
1355 ieee80211_mgd_probe_ap(sdata
, true);
1358 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1360 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1361 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1363 trace_api_beacon_loss(sdata
);
1365 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1366 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1368 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1370 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1372 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1373 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1375 trace_api_connection_loss(sdata
);
1377 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1378 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1380 EXPORT_SYMBOL(ieee80211_connection_loss
);
1383 static enum rx_mgmt_action __must_check
1384 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1385 struct ieee80211_mgmt
*mgmt
, size_t len
)
1387 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1388 const u8
*bssid
= NULL
;
1392 return RX_MGMT_NONE
;
1394 ASSERT_MGD_MTX(ifmgd
);
1396 bssid
= ifmgd
->associated
->bssid
;
1398 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1400 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1401 sdata
->name
, bssid
, reason_code
);
1403 ieee80211_set_disassoc(sdata
, true, false);
1404 mutex_lock(&sdata
->local
->mtx
);
1405 ieee80211_recalc_idle(sdata
->local
);
1406 mutex_unlock(&sdata
->local
->mtx
);
1408 return RX_MGMT_CFG80211_DEAUTH
;
1412 static enum rx_mgmt_action __must_check
1413 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1414 struct ieee80211_mgmt
*mgmt
, size_t len
)
1416 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1420 return RX_MGMT_NONE
;
1422 ASSERT_MGD_MTX(ifmgd
);
1424 if (WARN_ON(!ifmgd
->associated
))
1425 return RX_MGMT_NONE
;
1427 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1428 return RX_MGMT_NONE
;
1430 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1432 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1433 sdata
->name
, mgmt
->sa
, reason_code
);
1435 ieee80211_set_disassoc(sdata
, true, false);
1436 mutex_lock(&sdata
->local
->mtx
);
1437 ieee80211_recalc_idle(sdata
->local
);
1438 mutex_unlock(&sdata
->local
->mtx
);
1439 return RX_MGMT_CFG80211_DISASSOC
;
1443 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1444 struct ieee80211_mgmt
*mgmt
, size_t len
)
1446 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1447 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1448 struct ieee80211_local
*local
= sdata
->local
;
1449 struct ieee80211_supported_band
*sband
;
1450 struct sta_info
*sta
;
1451 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1453 u32 rates
, basic_rates
;
1454 u16 capab_info
, aid
;
1455 struct ieee802_11_elems elems
;
1456 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1459 bool have_higher_than_11mbit
= false;
1460 u16 ap_ht_cap_flags
;
1462 /* AssocResp and ReassocResp have identical structure */
1464 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1465 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1467 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1468 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1469 "set\n", sdata
->name
, aid
);
1470 aid
&= ~(BIT(15) | BIT(14));
1472 pos
= mgmt
->u
.assoc_resp
.variable
;
1473 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1475 if (!elems
.supp_rates
) {
1476 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1483 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
1485 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1486 " the AP\n", sdata
->name
);
1490 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
|
1492 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1493 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1497 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1499 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1500 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1501 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1504 have_higher_than_11mbit
= true;
1506 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1507 if (sband
->bitrates
[j
].bitrate
== rate
) {
1510 basic_rates
|= BIT(j
);
1516 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1517 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1518 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1521 have_higher_than_11mbit
= true;
1523 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1524 if (sband
->bitrates
[j
].bitrate
== rate
) {
1527 basic_rates
|= BIT(j
);
1533 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1534 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1536 /* cf. IEEE 802.11 9.2.12 */
1537 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1538 have_higher_than_11mbit
)
1539 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1541 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1543 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1544 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1545 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1547 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1549 rate_control_rate_init(sta
);
1551 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1552 set_sta_flags(sta
, WLAN_STA_MFP
);
1554 if (elems
.wmm_param
)
1555 set_sta_flags(sta
, WLAN_STA_WME
);
1557 err
= sta_info_insert(sta
);
1560 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1561 " the AP (error %d)\n", sdata
->name
, err
);
1566 * Always handle WMM once after association regardless
1567 * of the first value the AP uses. Setting -1 here has
1568 * that effect because the AP values is an unsigned
1571 ifmgd
->wmm_last_param_set
= -1;
1573 if (elems
.wmm_param
)
1574 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1575 elems
.wmm_param_len
);
1577 ieee80211_set_wmm_default(sdata
);
1579 local
->oper_channel
= wk
->chan
;
1581 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1582 (sdata
->local
->hw
.queues
>= 4) &&
1583 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1584 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1585 cbss
->bssid
, ap_ht_cap_flags
);
1587 /* set AID and assoc capability,
1588 * ieee80211_set_associated() will tell the driver */
1589 bss_conf
->aid
= aid
;
1590 bss_conf
->assoc_capability
= capab_info
;
1591 ieee80211_set_associated(sdata
, cbss
, changed
);
1594 * If we're using 4-addr mode, let the AP know that we're
1595 * doing so, so that it can create the STA VLAN on its side
1597 if (ifmgd
->use_4addr
)
1598 ieee80211_send_4addr_nullfunc(local
, sdata
);
1601 * Start timer to probe the connection to the AP now.
1602 * Also start the timer that will detect beacon loss.
1604 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1605 ieee80211_sta_reset_beacon_monitor(sdata
);
1611 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1612 struct ieee80211_mgmt
*mgmt
,
1614 struct ieee80211_rx_status
*rx_status
,
1615 struct ieee802_11_elems
*elems
,
1618 struct ieee80211_local
*local
= sdata
->local
;
1620 struct ieee80211_bss
*bss
;
1621 struct ieee80211_channel
*channel
;
1622 bool need_ps
= false;
1624 if (sdata
->u
.mgd
.associated
) {
1625 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1626 /* not previously set so we may need to recalc */
1627 need_ps
= !bss
->dtim_period
;
1630 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1631 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1634 freq
= rx_status
->freq
;
1636 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1638 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1641 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1644 ieee80211_rx_bss_put(local
, bss
);
1646 if (!sdata
->u
.mgd
.associated
)
1650 mutex_lock(&local
->iflist_mtx
);
1651 ieee80211_recalc_ps(local
, -1);
1652 mutex_unlock(&local
->iflist_mtx
);
1655 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1656 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1658 struct ieee80211_channel_sw_ie
*sw_elem
=
1659 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1660 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1661 bss
, rx_status
->mactime
);
1666 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1667 struct sk_buff
*skb
)
1669 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1670 struct ieee80211_if_managed
*ifmgd
;
1671 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1672 size_t baselen
, len
= skb
->len
;
1673 struct ieee802_11_elems elems
;
1675 ifmgd
= &sdata
->u
.mgd
;
1677 ASSERT_MGD_MTX(ifmgd
);
1679 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1680 return; /* ignore ProbeResp to foreign address */
1682 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1686 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1689 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1691 if (ifmgd
->associated
&&
1692 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1693 ieee80211_reset_ap_probe(sdata
);
1697 * This is the canonical list of information elements we care about,
1698 * the filter code also gives us all changes to the Microsoft OUI
1699 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1701 * We implement beacon filtering in software since that means we can
1702 * avoid processing the frame here and in cfg80211, and userspace
1703 * will not be able to tell whether the hardware supports it or not.
1705 * XXX: This list needs to be dynamic -- userspace needs to be able to
1706 * add items it requires. It also needs to be able to tell us to
1707 * look out for other vendor IEs.
1709 static const u64 care_about_ies
=
1710 (1ULL << WLAN_EID_COUNTRY
) |
1711 (1ULL << WLAN_EID_ERP_INFO
) |
1712 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1713 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1714 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1715 (1ULL << WLAN_EID_HT_INFORMATION
);
1717 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1718 struct ieee80211_mgmt
*mgmt
,
1720 struct ieee80211_rx_status
*rx_status
)
1722 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1723 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1725 struct ieee802_11_elems elems
;
1726 struct ieee80211_local
*local
= sdata
->local
;
1728 bool erp_valid
, directed_tim
= false;
1733 ASSERT_MGD_MTX(ifmgd
);
1735 /* Process beacon from the current BSS */
1736 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1740 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1744 * We might have received a number of frames, among them a
1745 * disassoc frame and a beacon...
1747 if (!ifmgd
->associated
)
1750 bssid
= ifmgd
->associated
->bssid
;
1753 * And in theory even frames from a different AP we were just
1754 * associated to a split-second ago!
1756 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1759 /* Track average RSSI from the Beacon frames of the current AP */
1760 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1761 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1762 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1763 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1764 ifmgd
->last_cqm_event_signal
= 0;
1765 ifmgd
->count_beacon_signal
= 1;
1766 ifmgd
->last_ave_beacon_signal
= 0;
1768 ifmgd
->ave_beacon_signal
=
1769 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1770 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1771 ifmgd
->ave_beacon_signal
) / 16;
1772 ifmgd
->count_beacon_signal
++;
1775 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1776 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1777 int sig
= ifmgd
->ave_beacon_signal
;
1778 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1781 * if signal crosses either of the boundaries, invoke callback
1782 * with appropriate parameters
1784 if (sig
> ifmgd
->rssi_max_thold
&&
1785 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1786 ifmgd
->last_ave_beacon_signal
= sig
;
1787 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1788 } else if (sig
< ifmgd
->rssi_min_thold
&&
1789 (last_sig
>= ifmgd
->rssi_max_thold
||
1791 ifmgd
->last_ave_beacon_signal
= sig
;
1792 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1796 if (bss_conf
->cqm_rssi_thold
&&
1797 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1798 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1799 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1800 int last_event
= ifmgd
->last_cqm_event_signal
;
1801 int thold
= bss_conf
->cqm_rssi_thold
;
1802 int hyst
= bss_conf
->cqm_rssi_hyst
;
1804 (last_event
== 0 || sig
< last_event
- hyst
)) {
1805 ifmgd
->last_cqm_event_signal
= sig
;
1806 ieee80211_cqm_rssi_notify(
1808 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1810 } else if (sig
> thold
&&
1811 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1812 ifmgd
->last_cqm_event_signal
= sig
;
1813 ieee80211_cqm_rssi_notify(
1815 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1820 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1821 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1822 if (net_ratelimit()) {
1823 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1824 "to a received beacon\n", sdata
->name
);
1827 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1828 mutex_lock(&local
->iflist_mtx
);
1829 ieee80211_recalc_ps(local
, -1);
1830 mutex_unlock(&local
->iflist_mtx
);
1834 * Push the beacon loss detection into the future since
1835 * we are processing a beacon from the AP just now.
1837 ieee80211_sta_reset_beacon_monitor(sdata
);
1839 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1840 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1841 len
- baselen
, &elems
,
1842 care_about_ies
, ncrc
);
1844 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1845 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1848 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1849 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1852 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1853 elems
.wmm_param_len
);
1856 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1858 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1859 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1860 ieee80211_hw_config(local
,
1861 IEEE80211_CONF_CHANGE_PS
);
1862 ieee80211_send_nullfunc(local
, sdata
, 0);
1864 local
->pspolling
= true;
1867 * Here is assumed that the driver will be
1868 * able to send ps-poll frame and receive a
1869 * response even though power save mode is
1870 * enabled, but some drivers might require
1871 * to disable power save here. This needs
1872 * to be investigated.
1874 ieee80211_send_pspoll(local
, sdata
);
1879 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1881 ifmgd
->beacon_crc
= ncrc
;
1882 ifmgd
->beacon_crc_valid
= true;
1884 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1886 erp_value
= elems
.erp_info
[0];
1890 changed
|= ieee80211_handle_bss_capability(sdata
,
1891 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1892 erp_valid
, erp_value
);
1895 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1896 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1897 struct sta_info
*sta
;
1898 struct ieee80211_supported_band
*sband
;
1899 u16 ap_ht_cap_flags
;
1903 sta
= sta_info_get(sdata
, bssid
);
1904 if (WARN_ON(!sta
)) {
1909 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1911 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1912 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1914 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1918 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1919 bssid
, ap_ht_cap_flags
);
1922 /* Note: country IE parsing is done for us by cfg80211 */
1923 if (elems
.country_elem
) {
1924 /* TODO: IBSS also needs this */
1925 if (elems
.pwr_constr_elem
)
1926 ieee80211_handle_pwr_constr(sdata
,
1927 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1928 elems
.pwr_constr_elem
,
1929 elems
.pwr_constr_elem_len
);
1932 ieee80211_bss_info_change_notify(sdata
, changed
);
1935 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1936 struct sk_buff
*skb
)
1938 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1939 struct ieee80211_rx_status
*rx_status
;
1940 struct ieee80211_mgmt
*mgmt
;
1941 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1944 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1945 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1946 fc
= le16_to_cpu(mgmt
->frame_control
);
1948 mutex_lock(&ifmgd
->mtx
);
1950 if (ifmgd
->associated
&&
1951 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
1952 switch (fc
& IEEE80211_FCTL_STYPE
) {
1953 case IEEE80211_STYPE_BEACON
:
1954 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1957 case IEEE80211_STYPE_PROBE_RESP
:
1958 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
1960 case IEEE80211_STYPE_DEAUTH
:
1961 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1963 case IEEE80211_STYPE_DISASSOC
:
1964 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1966 case IEEE80211_STYPE_ACTION
:
1967 switch (mgmt
->u
.action
.category
) {
1968 case WLAN_CATEGORY_SPECTRUM_MGMT
:
1969 ieee80211_sta_process_chanswitch(sdata
,
1970 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1971 (void *)ifmgd
->associated
->priv
,
1972 rx_status
->mactime
);
1976 mutex_unlock(&ifmgd
->mtx
);
1982 case RX_MGMT_CFG80211_DEAUTH
:
1983 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1985 case RX_MGMT_CFG80211_DISASSOC
:
1986 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1989 WARN(1, "unexpected: %d", rma
);
1994 mutex_unlock(&ifmgd
->mtx
);
1996 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
1997 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
1998 struct ieee80211_local
*local
= sdata
->local
;
1999 struct ieee80211_work
*wk
;
2001 mutex_lock(&local
->mtx
);
2002 list_for_each_entry(wk
, &local
->work_list
, list
) {
2003 if (wk
->sdata
!= sdata
)
2006 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2007 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2010 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2012 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2016 * Printing the message only here means we can't
2017 * spuriously print it, but it also means that it
2018 * won't be printed when the frame comes in before
2019 * we even tried to associate or in similar cases.
2021 * Ultimately, I suspect cfg80211 should print the
2025 "%s: deauthenticated from %pM (Reason: %u)\n",
2026 sdata
->name
, mgmt
->bssid
,
2027 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2029 list_del_rcu(&wk
->list
);
2033 mutex_unlock(&local
->mtx
);
2035 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2039 static void ieee80211_sta_timer(unsigned long data
)
2041 struct ieee80211_sub_if_data
*sdata
=
2042 (struct ieee80211_sub_if_data
*) data
;
2043 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2044 struct ieee80211_local
*local
= sdata
->local
;
2046 if (local
->quiescing
) {
2047 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2051 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2054 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2055 u8
*bssid
, u8 reason
)
2057 struct ieee80211_local
*local
= sdata
->local
;
2058 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2060 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2061 IEEE80211_STA_BEACON_POLL
);
2063 ieee80211_set_disassoc(sdata
, true, true);
2064 mutex_unlock(&ifmgd
->mtx
);
2065 mutex_lock(&local
->mtx
);
2066 ieee80211_recalc_idle(local
);
2067 mutex_unlock(&local
->mtx
);
2069 * must be outside lock due to cfg80211,
2070 * but that's not a problem.
2072 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2073 IEEE80211_STYPE_DEAUTH
, reason
,
2075 mutex_lock(&ifmgd
->mtx
);
2078 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2080 struct ieee80211_local
*local
= sdata
->local
;
2081 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2083 /* then process the rest of the work */
2084 mutex_lock(&ifmgd
->mtx
);
2086 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2087 IEEE80211_STA_CONNECTION_POLL
) &&
2088 ifmgd
->associated
) {
2092 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2094 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2095 max_tries
= max_nullfunc_tries
;
2097 max_tries
= max_probe_tries
;
2099 /* ACK received for nullfunc probing frame */
2100 if (!ifmgd
->probe_send_count
)
2101 ieee80211_reset_ap_probe(sdata
);
2102 else if (ifmgd
->nullfunc_failed
) {
2103 if (ifmgd
->probe_send_count
< max_tries
) {
2104 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2105 wiphy_debug(local
->hw
.wiphy
,
2106 "%s: No ack for nullfunc frame to"
2107 " AP %pM, try %d/%i\n",
2109 ifmgd
->probe_send_count
, max_tries
);
2111 ieee80211_mgd_probe_ap_send(sdata
);
2113 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2114 wiphy_debug(local
->hw
.wiphy
,
2115 "%s: No ack for nullfunc frame to"
2116 " AP %pM, disconnecting.\n",
2117 sdata
->name
, bssid
);
2119 ieee80211_sta_connection_lost(sdata
, bssid
,
2120 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2122 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2123 run_again(ifmgd
, ifmgd
->probe_timeout
);
2124 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2125 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2126 wiphy_debug(local
->hw
.wiphy
,
2127 "%s: Failed to send nullfunc to AP %pM"
2128 " after %dms, disconnecting.\n",
2130 bssid
, probe_wait_ms
);
2132 ieee80211_sta_connection_lost(sdata
, bssid
,
2133 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2134 } else if (ifmgd
->probe_send_count
< max_tries
) {
2135 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2136 wiphy_debug(local
->hw
.wiphy
,
2137 "%s: No probe response from AP %pM"
2138 " after %dms, try %d/%i\n",
2140 bssid
, probe_wait_ms
,
2141 ifmgd
->probe_send_count
, max_tries
);
2143 ieee80211_mgd_probe_ap_send(sdata
);
2146 * We actually lost the connection ... or did we?
2149 wiphy_debug(local
->hw
.wiphy
,
2150 "%s: No probe response from AP %pM"
2151 " after %dms, disconnecting.\n",
2153 bssid
, probe_wait_ms
);
2155 ieee80211_sta_connection_lost(sdata
, bssid
,
2156 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2160 mutex_unlock(&ifmgd
->mtx
);
2163 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2165 struct ieee80211_sub_if_data
*sdata
=
2166 (struct ieee80211_sub_if_data
*) data
;
2167 struct ieee80211_local
*local
= sdata
->local
;
2169 if (local
->quiescing
)
2172 ieee80211_queue_work(&sdata
->local
->hw
,
2173 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2176 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2178 struct ieee80211_sub_if_data
*sdata
=
2179 (struct ieee80211_sub_if_data
*) data
;
2180 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2181 struct ieee80211_local
*local
= sdata
->local
;
2183 if (local
->quiescing
)
2186 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2189 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2191 struct ieee80211_sub_if_data
*sdata
=
2192 container_of(work
, struct ieee80211_sub_if_data
,
2193 u
.mgd
.monitor_work
);
2195 ieee80211_mgd_probe_ap(sdata
, false);
2198 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2200 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2201 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2202 IEEE80211_STA_CONNECTION_POLL
);
2204 /* let's probe the connection once */
2205 ieee80211_queue_work(&sdata
->local
->hw
,
2206 &sdata
->u
.mgd
.monitor_work
);
2207 /* and do all the other regular work too */
2208 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2213 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2215 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2218 * we need to use atomic bitops for the running bits
2219 * only because both timers might fire at the same
2220 * time -- the code here is properly synchronised.
2223 cancel_work_sync(&ifmgd
->request_smps_work
);
2225 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2226 if (del_timer_sync(&ifmgd
->timer
))
2227 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2229 cancel_work_sync(&ifmgd
->chswitch_work
);
2230 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2231 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2233 cancel_work_sync(&ifmgd
->monitor_work
);
2234 /* these will just be re-established on connection */
2235 del_timer_sync(&ifmgd
->conn_mon_timer
);
2236 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2239 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2241 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2243 if (!ifmgd
->associated
)
2246 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2247 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2248 mutex_lock(&ifmgd
->mtx
);
2249 if (ifmgd
->associated
) {
2250 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2251 wiphy_debug(sdata
->local
->hw
.wiphy
,
2252 "%s: driver requested disconnect after resume.\n",
2255 ieee80211_sta_connection_lost(sdata
,
2256 ifmgd
->associated
->bssid
,
2257 WLAN_REASON_UNSPECIFIED
);
2258 mutex_unlock(&ifmgd
->mtx
);
2261 mutex_unlock(&ifmgd
->mtx
);
2264 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2265 add_timer(&ifmgd
->timer
);
2266 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2267 add_timer(&ifmgd
->chswitch_timer
);
2268 ieee80211_sta_reset_beacon_monitor(sdata
);
2269 ieee80211_restart_sta_timer(sdata
);
2270 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2274 /* interface setup */
2275 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2277 struct ieee80211_if_managed
*ifmgd
;
2279 ifmgd
= &sdata
->u
.mgd
;
2280 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2281 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2282 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2283 ieee80211_beacon_connection_loss_work
);
2284 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2285 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2286 (unsigned long) sdata
);
2287 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2288 (unsigned long) sdata
);
2289 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2290 (unsigned long) sdata
);
2291 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2292 (unsigned long) sdata
);
2296 mutex_init(&ifmgd
->mtx
);
2298 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2299 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2301 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2304 /* scan finished notification */
2305 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2307 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2309 /* Restart STA timers */
2311 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2312 ieee80211_restart_sta_timer(sdata
);
2316 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2317 unsigned long data
, void *dummy
)
2319 s32 latency_usec
= (s32
) data
;
2320 struct ieee80211_local
*local
=
2321 container_of(nb
, struct ieee80211_local
,
2322 network_latency_notifier
);
2324 mutex_lock(&local
->iflist_mtx
);
2325 ieee80211_recalc_ps(local
, latency_usec
);
2326 mutex_unlock(&local
->iflist_mtx
);
2332 static enum work_done_result
2333 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2334 struct sk_buff
*skb
)
2337 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2338 return WORK_DONE_DESTROY
;
2341 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2342 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2343 return WORK_DONE_DESTROY
;
2346 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2347 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2348 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2350 wk
->type
= IEEE80211_WORK_AUTH
;
2351 wk
->probe_auth
.tries
= 0;
2352 return WORK_DONE_REQUEUE
;
2355 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2356 struct cfg80211_auth_request
*req
)
2359 struct ieee80211_work
*wk
;
2362 if (req
->local_state_change
)
2363 return 0; /* no need to update mac80211 state */
2365 switch (req
->auth_type
) {
2366 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2367 auth_alg
= WLAN_AUTH_OPEN
;
2369 case NL80211_AUTHTYPE_SHARED_KEY
:
2370 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2372 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2374 case NL80211_AUTHTYPE_FT
:
2375 auth_alg
= WLAN_AUTH_FT
;
2377 case NL80211_AUTHTYPE_NETWORK_EAP
:
2378 auth_alg
= WLAN_AUTH_LEAP
;
2384 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2388 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2390 if (req
->ie
&& req
->ie_len
) {
2391 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2392 wk
->ie_len
= req
->ie_len
;
2395 if (req
->key
&& req
->key_len
) {
2396 wk
->probe_auth
.key_len
= req
->key_len
;
2397 wk
->probe_auth
.key_idx
= req
->key_idx
;
2398 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2401 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2402 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2403 wk
->probe_auth
.ssid_len
= ssid
[1];
2405 wk
->probe_auth
.algorithm
= auth_alg
;
2406 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2408 /* if we already have a probe, don't probe again */
2409 if (req
->bss
->proberesp_ies
)
2410 wk
->type
= IEEE80211_WORK_AUTH
;
2412 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2413 wk
->chan
= req
->bss
->channel
;
2414 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2416 wk
->done
= ieee80211_probe_auth_done
;
2418 ieee80211_add_work(wk
);
2422 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2423 struct sk_buff
*skb
)
2425 struct ieee80211_mgmt
*mgmt
;
2426 struct ieee80211_rx_status
*rx_status
;
2427 struct ieee802_11_elems elems
;
2431 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2432 return WORK_DONE_DESTROY
;
2435 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2436 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2437 rx_status
= (void *) skb
->cb
;
2438 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2439 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2441 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2443 wk
->type
= IEEE80211_WORK_ASSOC
;
2444 /* not really done yet */
2445 return WORK_DONE_REQUEUE
;
2448 mgmt
= (void *)skb
->data
;
2449 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2451 if (status
== WLAN_STATUS_SUCCESS
) {
2452 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2453 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2454 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2455 /* oops -- internal error -- send timeout for now */
2456 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2458 return WORK_DONE_DESTROY
;
2461 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2464 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2465 return WORK_DONE_DESTROY
;
2468 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2469 struct cfg80211_assoc_request
*req
)
2471 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2472 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2473 struct ieee80211_work
*wk
;
2477 mutex_lock(&ifmgd
->mtx
);
2478 if (ifmgd
->associated
) {
2479 if (!req
->prev_bssid
||
2480 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2483 * We are already associated and the request was not a
2484 * reassociation request from the current BSS, so
2487 mutex_unlock(&ifmgd
->mtx
);
2491 /* Trying to reassociate - clear previous association state */
2492 ieee80211_set_disassoc(sdata
, true, false);
2494 mutex_unlock(&ifmgd
->mtx
);
2496 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2500 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2501 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2503 ifmgd
->beacon_crc_valid
= false;
2505 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2506 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2507 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2508 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2509 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2512 if (req
->ie
&& req
->ie_len
) {
2513 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2514 wk
->ie_len
= req
->ie_len
;
2518 wk
->assoc
.bss
= req
->bss
;
2520 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2522 /* new association always uses requested smps mode */
2523 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2524 if (ifmgd
->powersave
)
2525 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2527 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2529 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2531 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2533 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2534 * We still associate in non-HT mode (11a/b/g) if any one of these
2535 * ciphers is configured as pairwise.
2536 * We can set this to true for non-11n hardware, that'll be checked
2537 * separately along with the peer capabilities.
2539 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2540 wk
->assoc
.capability
= req
->bss
->capability
;
2541 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2542 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2543 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2544 wk
->assoc
.ht_information_ie
=
2545 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2547 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2548 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2549 wk
->assoc
.uapsd_used
= true;
2550 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2552 wk
->assoc
.uapsd_used
= false;
2553 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2556 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2557 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2558 wk
->assoc
.ssid_len
= ssid
[1];
2560 if (req
->prev_bssid
)
2561 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2563 wk
->chan
= req
->bss
->channel
;
2564 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2566 wk
->done
= ieee80211_assoc_done
;
2567 if (!bss
->dtim_period
&&
2568 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2569 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2571 wk
->type
= IEEE80211_WORK_ASSOC
;
2574 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2575 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2577 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2578 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2581 if (req
->crypto
.control_port
)
2582 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2584 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2586 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2587 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2589 ieee80211_add_work(wk
);
2593 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2594 struct cfg80211_deauth_request
*req
,
2597 struct ieee80211_local
*local
= sdata
->local
;
2598 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2599 struct ieee80211_work
*wk
;
2601 bool assoc_bss
= false;
2603 mutex_lock(&ifmgd
->mtx
);
2605 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2606 if (ifmgd
->associated
== req
->bss
) {
2607 ieee80211_set_disassoc(sdata
, false, true);
2608 mutex_unlock(&ifmgd
->mtx
);
2611 bool not_auth_yet
= false;
2613 mutex_unlock(&ifmgd
->mtx
);
2615 mutex_lock(&local
->mtx
);
2616 list_for_each_entry(wk
, &local
->work_list
, list
) {
2617 if (wk
->sdata
!= sdata
)
2620 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2621 wk
->type
!= IEEE80211_WORK_AUTH
&&
2622 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2623 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2626 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2629 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2630 list_del_rcu(&wk
->list
);
2634 mutex_unlock(&local
->mtx
);
2637 * If somebody requests authentication and we haven't
2638 * sent out an auth frame yet there's no need to send
2639 * out a deauth frame either. If the state was PROBE,
2640 * then this is the case. If it's AUTH we have sent a
2641 * frame, and if it's IDLE we have completed the auth
2645 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2650 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2651 sdata
->name
, bssid
, req
->reason_code
);
2653 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2654 req
->reason_code
, cookie
,
2655 !req
->local_state_change
);
2657 sta_info_destroy_addr(sdata
, bssid
);
2659 mutex_lock(&sdata
->local
->mtx
);
2660 ieee80211_recalc_idle(sdata
->local
);
2661 mutex_unlock(&sdata
->local
->mtx
);
2666 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2667 struct cfg80211_disassoc_request
*req
,
2670 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2673 mutex_lock(&ifmgd
->mtx
);
2676 * cfg80211 should catch this ... but it's racy since
2677 * we can receive a disassoc frame, process it, hand it
2678 * to cfg80211 while that's in a locked section already
2679 * trying to tell us that the user wants to disconnect.
2681 if (ifmgd
->associated
!= req
->bss
) {
2682 mutex_unlock(&ifmgd
->mtx
);
2686 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2687 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2689 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2690 ieee80211_set_disassoc(sdata
, false, true);
2692 mutex_unlock(&ifmgd
->mtx
);
2694 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2695 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2696 cookie
, !req
->local_state_change
);
2697 sta_info_destroy_addr(sdata
, bssid
);
2699 mutex_lock(&sdata
->local
->mtx
);
2700 ieee80211_recalc_idle(sdata
->local
);
2701 mutex_unlock(&sdata
->local
->mtx
);
2706 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2707 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2710 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2712 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2714 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2716 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2718 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2720 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2721 return sdata
->dev
->operstate
;
2723 EXPORT_SYMBOL(ieee80211_get_operstate
);