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
;
619 if (!mgd
->associated
)
622 if (!mgd
->associated
->beacon_ies
)
625 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
626 IEEE80211_STA_CONNECTION_POLL
))
630 sta
= sta_info_get(sdata
, mgd
->bssid
);
632 sta_flags
= get_sta_flags(sta
);
635 if (!(sta_flags
& WLAN_STA_AUTHORIZED
))
641 /* need to hold RTNL or interface lock */
642 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
644 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
648 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
649 local
->ps_sdata
= NULL
;
653 if (!list_empty(&local
->work_list
)) {
654 local
->ps_sdata
= NULL
;
658 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
659 if (!ieee80211_sdata_running(sdata
))
661 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
662 /* If an AP vif is found, then disable PS
663 * by setting the count to zero thereby setting
669 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
675 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
676 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
680 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
682 beaconint_us
= ieee80211_tu_to_usec(
683 found
->vif
.bss_conf
.beacon_int
);
685 timeout
= local
->dynamic_ps_forced_timeout
;
688 * Go to full PSM if the user configures a very low
689 * latency requirement.
690 * The 2000 second value is there for compatibility
691 * until the PM_QOS_NETWORK_LATENCY is configured
694 if (latency
> (1900 * USEC_PER_MSEC
) &&
695 latency
!= (2000 * USEC_PER_SEC
))
700 local
->dynamic_ps_user_timeout
= timeout
;
701 if (!local
->disable_dynamic_ps
)
702 conf
->dynamic_ps_timeout
=
703 local
->dynamic_ps_user_timeout
;
705 if (beaconint_us
> latency
) {
706 local
->ps_sdata
= NULL
;
708 struct ieee80211_bss
*bss
;
712 bss
= (void *)found
->u
.mgd
.associated
->priv
;
713 dtimper
= bss
->dtim_period
;
715 /* If the TIM IE is invalid, pretend the value is 1 */
718 else if (dtimper
> 1)
719 maxslp
= min_t(int, dtimper
,
720 latency
/ beaconint_us
);
722 local
->hw
.conf
.max_sleep_period
= maxslp
;
723 local
->hw
.conf
.ps_dtim_period
= dtimper
;
724 local
->ps_sdata
= found
;
727 local
->ps_sdata
= NULL
;
731 ieee80211_change_ps(local
);
734 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
736 struct ieee80211_local
*local
=
737 container_of(work
, struct ieee80211_local
,
738 dynamic_ps_disable_work
);
740 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
741 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
742 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
745 ieee80211_wake_queues_by_reason(&local
->hw
,
746 IEEE80211_QUEUE_STOP_REASON_PS
);
749 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
751 struct ieee80211_local
*local
=
752 container_of(work
, struct ieee80211_local
,
753 dynamic_ps_enable_work
);
754 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
755 struct ieee80211_if_managed
*ifmgd
;
759 /* can only happen when PS was just disabled anyway */
763 ifmgd
= &sdata
->u
.mgd
;
765 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
768 if (!local
->disable_dynamic_ps
&&
769 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
770 /* don't enter PS if TX frames are pending */
771 if (drv_tx_frames_pending(local
)) {
772 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
774 local
->hw
.conf
.dynamic_ps_timeout
));
779 * transmission can be stopped by others which leads to
780 * dynamic_ps_timer expiry. Postpone the ps timer if it
781 * is not the actual idle state.
783 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
784 for (q
= 0; q
< local
->hw
.queues
; q
++) {
785 if (local
->queue_stop_reasons
[q
]) {
786 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
788 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
790 local
->hw
.conf
.dynamic_ps_timeout
));
794 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
797 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
798 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
))) {
799 netif_tx_stop_all_queues(sdata
->dev
);
801 if (drv_tx_frames_pending(local
))
802 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
804 local
->hw
.conf
.dynamic_ps_timeout
));
806 ieee80211_send_nullfunc(local
, sdata
, 1);
807 /* Flush to get the tx status of nullfunc frame */
808 drv_flush(local
, false);
812 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
813 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
814 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
815 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
816 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
817 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
820 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
821 netif_tx_wake_all_queues(sdata
->dev
);
824 void ieee80211_dynamic_ps_timer(unsigned long data
)
826 struct ieee80211_local
*local
= (void *) data
;
828 if (local
->quiescing
|| local
->suspended
)
831 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
835 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
836 struct ieee80211_sub_if_data
*sdata
,
837 u8
*wmm_param
, size_t wmm_param_len
)
839 struct ieee80211_tx_queue_params params
;
840 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
843 u8
*pos
, uapsd_queues
= 0;
845 if (!local
->ops
->conf_tx
)
848 if (local
->hw
.queues
< 4)
854 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
857 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
858 uapsd_queues
= local
->uapsd_queues
;
860 count
= wmm_param
[6] & 0x0f;
861 if (count
== ifmgd
->wmm_last_param_set
)
863 ifmgd
->wmm_last_param_set
= count
;
866 left
= wmm_param_len
- 8;
868 memset(¶ms
, 0, sizeof(params
));
871 for (; left
>= 4; left
-= 4, pos
+= 4) {
872 int aci
= (pos
[0] >> 5) & 0x03;
873 int acm
= (pos
[0] >> 4) & 0x01;
881 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
882 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
888 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
889 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
895 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
896 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
903 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
904 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
909 params
.aifs
= pos
[0] & 0x0f;
910 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
911 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
912 params
.txop
= get_unaligned_le16(pos
+ 2);
913 params
.uapsd
= uapsd
;
915 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
916 wiphy_debug(local
->hw
.wiphy
,
917 "WMM queue=%d aci=%d acm=%d aifs=%d "
918 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
920 params
.aifs
, params
.cw_min
, params
.cw_max
,
921 params
.txop
, params
.uapsd
);
923 local
->tx_conf
[queue
] = params
;
924 if (drv_conf_tx(local
, queue
, ¶ms
))
925 wiphy_debug(local
->hw
.wiphy
,
926 "failed to set TX queue parameters for queue %d\n",
930 /* enable WMM or activate new settings */
931 sdata
->vif
.bss_conf
.qos
= true;
932 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
935 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
936 u16 capab
, bool erp_valid
, u8 erp
)
938 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
941 bool use_short_preamble
;
945 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
946 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
948 use_protection
= false;
949 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
952 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
953 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
954 use_short_slot
= true;
956 if (use_protection
!= bss_conf
->use_cts_prot
) {
957 bss_conf
->use_cts_prot
= use_protection
;
958 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
961 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
962 bss_conf
->use_short_preamble
= use_short_preamble
;
963 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
966 if (use_short_slot
!= bss_conf
->use_short_slot
) {
967 bss_conf
->use_short_slot
= use_short_slot
;
968 changed
|= BSS_CHANGED_ERP_SLOT
;
974 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
975 struct cfg80211_bss
*cbss
,
976 u32 bss_info_changed
)
978 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
979 struct ieee80211_local
*local
= sdata
->local
;
980 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
982 bss_info_changed
|= BSS_CHANGED_ASSOC
;
983 /* set timing information */
984 bss_conf
->beacon_int
= cbss
->beacon_interval
;
985 bss_conf
->timestamp
= cbss
->tsf
;
987 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
988 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
989 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
991 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
992 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
994 sdata
->u
.mgd
.associated
= cbss
;
995 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
997 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
999 /* just to be sure */
1000 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1001 IEEE80211_STA_BEACON_POLL
);
1003 ieee80211_led_assoc(local
, 1);
1005 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1006 bss_conf
->dtim_period
= bss
->dtim_period
;
1008 bss_conf
->dtim_period
= 0;
1010 bss_conf
->assoc
= 1;
1012 * For now just always ask the driver to update the basic rateset
1013 * when we have associated, we aren't checking whether it actually
1016 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1018 /* And the BSSID changed - we're associated now */
1019 bss_info_changed
|= BSS_CHANGED_BSSID
;
1021 /* Tell the driver to monitor connection quality (if supported) */
1022 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1023 bss_conf
->cqm_rssi_thold
)
1024 bss_info_changed
|= BSS_CHANGED_CQM
;
1026 /* Enable ARP filtering */
1027 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1028 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1029 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1032 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1034 mutex_lock(&local
->iflist_mtx
);
1035 ieee80211_recalc_ps(local
, -1);
1036 ieee80211_recalc_smps(local
);
1037 mutex_unlock(&local
->iflist_mtx
);
1039 netif_tx_start_all_queues(sdata
->dev
);
1040 netif_carrier_on(sdata
->dev
);
1043 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1044 bool remove_sta
, bool tx
)
1046 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1047 struct ieee80211_local
*local
= sdata
->local
;
1048 struct sta_info
*sta
;
1049 u32 changed
= 0, config_changed
= 0;
1052 ASSERT_MGD_MTX(ifmgd
);
1054 if (WARN_ON(!ifmgd
->associated
))
1057 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1059 ifmgd
->associated
= NULL
;
1060 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1063 * we need to commit the associated = NULL change because the
1064 * scan code uses that to determine whether this iface should
1065 * go to/wake up from powersave or not -- and could otherwise
1066 * wake the queues erroneously.
1071 * Thus, we can only afterwards stop the queues -- to account
1072 * for the case where another CPU is finishing a scan at this
1073 * time -- we don't want the scan code to enable queues.
1076 netif_tx_stop_all_queues(sdata
->dev
);
1077 netif_carrier_off(sdata
->dev
);
1079 mutex_lock(&local
->sta_mtx
);
1080 sta
= sta_info_get(sdata
, bssid
);
1082 set_sta_flags(sta
, WLAN_STA_BLOCK_BA
);
1083 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1085 mutex_unlock(&local
->sta_mtx
);
1087 changed
|= ieee80211_reset_erp_info(sdata
);
1089 ieee80211_led_assoc(local
, 0);
1090 changed
|= BSS_CHANGED_ASSOC
;
1091 sdata
->vif
.bss_conf
.assoc
= false;
1093 ieee80211_set_wmm_default(sdata
);
1095 /* channel(_type) changes are handled by ieee80211_hw_config */
1096 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1098 /* on the next assoc, re-program HT parameters */
1099 sdata
->ht_opmode_valid
= false;
1101 local
->power_constr_level
= 0;
1103 del_timer_sync(&local
->dynamic_ps_timer
);
1104 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1106 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1107 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1108 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1110 local
->ps_sdata
= NULL
;
1112 ieee80211_hw_config(local
, config_changed
);
1114 /* Disable ARP filtering */
1115 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1116 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1117 changed
|= BSS_CHANGED_ARP_FILTER
;
1120 /* The BSSID (not really interesting) and HT changed */
1121 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1122 ieee80211_bss_info_change_notify(sdata
, changed
);
1125 sta_info_destroy_addr(sdata
, bssid
);
1127 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1128 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1129 del_timer_sync(&sdata
->u
.mgd
.timer
);
1130 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1133 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1134 struct ieee80211_hdr
*hdr
)
1137 * We can postpone the mgd.timer whenever receiving unicast frames
1138 * from AP because we know that the connection is working both ways
1139 * at that time. But multicast frames (and hence also beacons) must
1140 * be ignored here, because we need to trigger the timer during
1141 * data idle periods for sending the periodic probe request to the
1142 * AP we're connected to.
1144 if (is_multicast_ether_addr(hdr
->addr1
))
1147 ieee80211_sta_reset_conn_monitor(sdata
);
1150 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1152 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1154 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1155 IEEE80211_STA_CONNECTION_POLL
)))
1158 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1159 IEEE80211_STA_BEACON_POLL
);
1160 mutex_lock(&sdata
->local
->iflist_mtx
);
1161 ieee80211_recalc_ps(sdata
->local
, -1);
1162 mutex_unlock(&sdata
->local
->iflist_mtx
);
1164 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1168 * We've received a probe response, but are not sure whether
1169 * we have or will be receiving any beacons or data, so let's
1170 * schedule the timers again, just in case.
1172 ieee80211_sta_reset_beacon_monitor(sdata
);
1174 mod_timer(&ifmgd
->conn_mon_timer
,
1175 round_jiffies_up(jiffies
+
1176 IEEE80211_CONNECTION_IDLE_TIME
));
1179 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1180 struct ieee80211_hdr
*hdr
, bool ack
)
1182 if (!ieee80211_is_data(hdr
->frame_control
))
1186 ieee80211_sta_reset_conn_monitor(sdata
);
1188 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1189 sdata
->u
.mgd
.probe_send_count
> 0) {
1191 sdata
->u
.mgd
.probe_send_count
= 0;
1193 sdata
->u
.mgd
.nullfunc_failed
= true;
1194 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1198 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1200 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1202 u8
*dst
= ifmgd
->associated
->bssid
;
1203 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1206 * Try sending broadcast probe requests for the last three
1207 * probe requests after the first ones failed since some
1208 * buggy APs only support broadcast probe requests.
1210 if (ifmgd
->probe_send_count
>= unicast_limit
)
1214 * When the hardware reports an accurate Tx ACK status, it's
1215 * better to send a nullfunc frame instead of a probe request,
1216 * as it will kick us off the AP quickly if we aren't associated
1217 * anymore. The timeout will be reset if the frame is ACKed by
1220 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1221 ifmgd
->nullfunc_failed
= false;
1222 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1224 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1225 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1229 ifmgd
->probe_send_count
++;
1230 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1231 run_again(ifmgd
, ifmgd
->probe_timeout
);
1234 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1237 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1238 bool already
= false;
1240 if (!ieee80211_sdata_running(sdata
))
1243 if (sdata
->local
->scanning
)
1246 if (sdata
->local
->tmp_channel
)
1249 mutex_lock(&ifmgd
->mtx
);
1251 if (!ifmgd
->associated
)
1254 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1255 if (beacon
&& net_ratelimit())
1256 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1257 "- sending probe request\n", sdata
->name
);
1261 * The driver/our work has already reported this event or the
1262 * connection monitoring has kicked in and we have already sent
1263 * a probe request. Or maybe the AP died and the driver keeps
1264 * reporting until we disassociate...
1266 * In either case we have to ignore the current call to this
1267 * function (except for setting the correct probe reason bit)
1268 * because otherwise we would reset the timer every time and
1269 * never check whether we received a probe response!
1271 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1272 IEEE80211_STA_CONNECTION_POLL
))
1276 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1278 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1283 mutex_lock(&sdata
->local
->iflist_mtx
);
1284 ieee80211_recalc_ps(sdata
->local
, -1);
1285 mutex_unlock(&sdata
->local
->iflist_mtx
);
1287 ifmgd
->probe_send_count
= 0;
1288 ieee80211_mgd_probe_ap_send(sdata
);
1290 mutex_unlock(&ifmgd
->mtx
);
1293 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1294 struct ieee80211_vif
*vif
)
1296 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1297 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1298 struct sk_buff
*skb
;
1301 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1304 ASSERT_MGD_MTX(ifmgd
);
1306 if (!ifmgd
->associated
)
1309 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1310 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1311 (u32
) -1, ssid
+ 2, ssid
[1],
1316 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1318 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1320 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1321 struct ieee80211_local
*local
= sdata
->local
;
1324 mutex_lock(&ifmgd
->mtx
);
1325 if (!ifmgd
->associated
) {
1326 mutex_unlock(&ifmgd
->mtx
);
1330 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1332 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1333 sdata
->name
, bssid
);
1335 ieee80211_set_disassoc(sdata
, true, true);
1336 mutex_unlock(&ifmgd
->mtx
);
1338 mutex_lock(&local
->mtx
);
1339 ieee80211_recalc_idle(local
);
1340 mutex_unlock(&local
->mtx
);
1342 * must be outside lock due to cfg80211,
1343 * but that's not a problem.
1345 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1346 IEEE80211_STYPE_DEAUTH
,
1347 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1351 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1353 struct ieee80211_sub_if_data
*sdata
=
1354 container_of(work
, struct ieee80211_sub_if_data
,
1355 u
.mgd
.beacon_connection_loss_work
);
1357 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1358 __ieee80211_connection_loss(sdata
);
1360 ieee80211_mgd_probe_ap(sdata
, true);
1363 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1365 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1366 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1368 trace_api_beacon_loss(sdata
);
1370 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1371 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1373 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1375 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1377 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1378 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1380 trace_api_connection_loss(sdata
);
1382 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1383 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1385 EXPORT_SYMBOL(ieee80211_connection_loss
);
1388 static enum rx_mgmt_action __must_check
1389 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1390 struct ieee80211_mgmt
*mgmt
, size_t len
)
1392 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1393 const u8
*bssid
= NULL
;
1397 return RX_MGMT_NONE
;
1399 ASSERT_MGD_MTX(ifmgd
);
1401 bssid
= ifmgd
->associated
->bssid
;
1403 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1405 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1406 sdata
->name
, bssid
, reason_code
);
1408 ieee80211_set_disassoc(sdata
, true, false);
1409 mutex_lock(&sdata
->local
->mtx
);
1410 ieee80211_recalc_idle(sdata
->local
);
1411 mutex_unlock(&sdata
->local
->mtx
);
1413 return RX_MGMT_CFG80211_DEAUTH
;
1417 static enum rx_mgmt_action __must_check
1418 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1419 struct ieee80211_mgmt
*mgmt
, size_t len
)
1421 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1425 return RX_MGMT_NONE
;
1427 ASSERT_MGD_MTX(ifmgd
);
1429 if (WARN_ON(!ifmgd
->associated
))
1430 return RX_MGMT_NONE
;
1432 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1433 return RX_MGMT_NONE
;
1435 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1437 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1438 sdata
->name
, mgmt
->sa
, reason_code
);
1440 ieee80211_set_disassoc(sdata
, true, false);
1441 mutex_lock(&sdata
->local
->mtx
);
1442 ieee80211_recalc_idle(sdata
->local
);
1443 mutex_unlock(&sdata
->local
->mtx
);
1444 return RX_MGMT_CFG80211_DISASSOC
;
1448 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1449 struct ieee80211_mgmt
*mgmt
, size_t len
)
1451 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1452 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1453 struct ieee80211_local
*local
= sdata
->local
;
1454 struct ieee80211_supported_band
*sband
;
1455 struct sta_info
*sta
;
1456 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1458 u32 rates
, basic_rates
;
1459 u16 capab_info
, aid
;
1460 struct ieee802_11_elems elems
;
1461 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1464 bool have_higher_than_11mbit
= false;
1465 u16 ap_ht_cap_flags
;
1467 /* AssocResp and ReassocResp have identical structure */
1469 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1470 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1472 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1474 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1476 aid
&= ~(BIT(15) | BIT(14));
1478 ifmgd
->broken_ap
= false;
1480 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1482 "%s: invalid AID value %d (out of range), turn off PS\n",
1485 ifmgd
->broken_ap
= true;
1488 pos
= mgmt
->u
.assoc_resp
.variable
;
1489 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1491 if (!elems
.supp_rates
) {
1492 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1499 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
1501 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1502 " the AP\n", sdata
->name
);
1506 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
|
1508 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1509 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1513 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1515 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1516 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1517 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1520 have_higher_than_11mbit
= true;
1522 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1523 if (sband
->bitrates
[j
].bitrate
== rate
) {
1526 basic_rates
|= BIT(j
);
1532 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1533 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1534 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1537 have_higher_than_11mbit
= true;
1539 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1540 if (sband
->bitrates
[j
].bitrate
== rate
) {
1543 basic_rates
|= BIT(j
);
1549 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1550 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1552 /* cf. IEEE 802.11 9.2.12 */
1553 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1554 have_higher_than_11mbit
)
1555 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1557 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1559 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1560 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1561 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1563 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1565 rate_control_rate_init(sta
);
1567 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1568 set_sta_flags(sta
, WLAN_STA_MFP
);
1570 if (elems
.wmm_param
)
1571 set_sta_flags(sta
, WLAN_STA_WME
);
1573 err
= sta_info_insert(sta
);
1576 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1577 " the AP (error %d)\n", sdata
->name
, err
);
1582 * Always handle WMM once after association regardless
1583 * of the first value the AP uses. Setting -1 here has
1584 * that effect because the AP values is an unsigned
1587 ifmgd
->wmm_last_param_set
= -1;
1589 if (elems
.wmm_param
)
1590 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1591 elems
.wmm_param_len
);
1593 ieee80211_set_wmm_default(sdata
);
1595 local
->oper_channel
= wk
->chan
;
1597 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1598 (sdata
->local
->hw
.queues
>= 4) &&
1599 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1600 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1601 cbss
->bssid
, ap_ht_cap_flags
);
1603 /* set AID and assoc capability,
1604 * ieee80211_set_associated() will tell the driver */
1605 bss_conf
->aid
= aid
;
1606 bss_conf
->assoc_capability
= capab_info
;
1607 ieee80211_set_associated(sdata
, cbss
, changed
);
1610 * If we're using 4-addr mode, let the AP know that we're
1611 * doing so, so that it can create the STA VLAN on its side
1613 if (ifmgd
->use_4addr
)
1614 ieee80211_send_4addr_nullfunc(local
, sdata
);
1617 * Start timer to probe the connection to the AP now.
1618 * Also start the timer that will detect beacon loss.
1620 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1621 ieee80211_sta_reset_beacon_monitor(sdata
);
1627 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1628 struct ieee80211_mgmt
*mgmt
,
1630 struct ieee80211_rx_status
*rx_status
,
1631 struct ieee802_11_elems
*elems
,
1634 struct ieee80211_local
*local
= sdata
->local
;
1636 struct ieee80211_bss
*bss
;
1637 struct ieee80211_channel
*channel
;
1638 bool need_ps
= false;
1640 if (sdata
->u
.mgd
.associated
) {
1641 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1642 /* not previously set so we may need to recalc */
1643 need_ps
= !bss
->dtim_period
;
1646 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1647 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1650 freq
= rx_status
->freq
;
1652 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1654 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1657 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1660 ieee80211_rx_bss_put(local
, bss
);
1662 if (!sdata
->u
.mgd
.associated
)
1666 mutex_lock(&local
->iflist_mtx
);
1667 ieee80211_recalc_ps(local
, -1);
1668 mutex_unlock(&local
->iflist_mtx
);
1671 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1672 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1674 struct ieee80211_channel_sw_ie
*sw_elem
=
1675 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1676 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1677 bss
, rx_status
->mactime
);
1682 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1683 struct sk_buff
*skb
)
1685 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1686 struct ieee80211_if_managed
*ifmgd
;
1687 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1688 size_t baselen
, len
= skb
->len
;
1689 struct ieee802_11_elems elems
;
1691 ifmgd
= &sdata
->u
.mgd
;
1693 ASSERT_MGD_MTX(ifmgd
);
1695 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1696 return; /* ignore ProbeResp to foreign address */
1698 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1702 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1705 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1707 if (ifmgd
->associated
&&
1708 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1709 ieee80211_reset_ap_probe(sdata
);
1713 * This is the canonical list of information elements we care about,
1714 * the filter code also gives us all changes to the Microsoft OUI
1715 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1717 * We implement beacon filtering in software since that means we can
1718 * avoid processing the frame here and in cfg80211, and userspace
1719 * will not be able to tell whether the hardware supports it or not.
1721 * XXX: This list needs to be dynamic -- userspace needs to be able to
1722 * add items it requires. It also needs to be able to tell us to
1723 * look out for other vendor IEs.
1725 static const u64 care_about_ies
=
1726 (1ULL << WLAN_EID_COUNTRY
) |
1727 (1ULL << WLAN_EID_ERP_INFO
) |
1728 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1729 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1730 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1731 (1ULL << WLAN_EID_HT_INFORMATION
);
1733 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1734 struct ieee80211_mgmt
*mgmt
,
1736 struct ieee80211_rx_status
*rx_status
)
1738 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1739 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1741 struct ieee802_11_elems elems
;
1742 struct ieee80211_local
*local
= sdata
->local
;
1744 bool erp_valid
, directed_tim
= false;
1749 ASSERT_MGD_MTX(ifmgd
);
1751 /* Process beacon from the current BSS */
1752 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1756 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1760 * We might have received a number of frames, among them a
1761 * disassoc frame and a beacon...
1763 if (!ifmgd
->associated
)
1766 bssid
= ifmgd
->associated
->bssid
;
1769 * And in theory even frames from a different AP we were just
1770 * associated to a split-second ago!
1772 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1775 /* Track average RSSI from the Beacon frames of the current AP */
1776 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1777 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1778 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1779 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1780 ifmgd
->last_cqm_event_signal
= 0;
1781 ifmgd
->count_beacon_signal
= 1;
1782 ifmgd
->last_ave_beacon_signal
= 0;
1784 ifmgd
->ave_beacon_signal
=
1785 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1786 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1787 ifmgd
->ave_beacon_signal
) / 16;
1788 ifmgd
->count_beacon_signal
++;
1791 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1792 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1793 int sig
= ifmgd
->ave_beacon_signal
;
1794 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1797 * if signal crosses either of the boundaries, invoke callback
1798 * with appropriate parameters
1800 if (sig
> ifmgd
->rssi_max_thold
&&
1801 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1802 ifmgd
->last_ave_beacon_signal
= sig
;
1803 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1804 } else if (sig
< ifmgd
->rssi_min_thold
&&
1805 (last_sig
>= ifmgd
->rssi_max_thold
||
1807 ifmgd
->last_ave_beacon_signal
= sig
;
1808 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1812 if (bss_conf
->cqm_rssi_thold
&&
1813 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1814 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1815 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1816 int last_event
= ifmgd
->last_cqm_event_signal
;
1817 int thold
= bss_conf
->cqm_rssi_thold
;
1818 int hyst
= bss_conf
->cqm_rssi_hyst
;
1820 (last_event
== 0 || sig
< last_event
- hyst
)) {
1821 ifmgd
->last_cqm_event_signal
= sig
;
1822 ieee80211_cqm_rssi_notify(
1824 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1826 } else if (sig
> thold
&&
1827 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1828 ifmgd
->last_cqm_event_signal
= sig
;
1829 ieee80211_cqm_rssi_notify(
1831 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1836 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1837 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1838 if (net_ratelimit()) {
1839 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1840 "to a received beacon\n", sdata
->name
);
1843 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1844 mutex_lock(&local
->iflist_mtx
);
1845 ieee80211_recalc_ps(local
, -1);
1846 mutex_unlock(&local
->iflist_mtx
);
1850 * Push the beacon loss detection into the future since
1851 * we are processing a beacon from the AP just now.
1853 ieee80211_sta_reset_beacon_monitor(sdata
);
1855 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1856 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1857 len
- baselen
, &elems
,
1858 care_about_ies
, ncrc
);
1860 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1861 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1864 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1865 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1868 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1869 elems
.wmm_param_len
);
1872 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1874 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1875 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1876 ieee80211_hw_config(local
,
1877 IEEE80211_CONF_CHANGE_PS
);
1878 ieee80211_send_nullfunc(local
, sdata
, 0);
1880 local
->pspolling
= true;
1883 * Here is assumed that the driver will be
1884 * able to send ps-poll frame and receive a
1885 * response even though power save mode is
1886 * enabled, but some drivers might require
1887 * to disable power save here. This needs
1888 * to be investigated.
1890 ieee80211_send_pspoll(local
, sdata
);
1895 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1897 ifmgd
->beacon_crc
= ncrc
;
1898 ifmgd
->beacon_crc_valid
= true;
1900 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1902 erp_value
= elems
.erp_info
[0];
1906 changed
|= ieee80211_handle_bss_capability(sdata
,
1907 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1908 erp_valid
, erp_value
);
1911 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1912 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1913 struct sta_info
*sta
;
1914 struct ieee80211_supported_band
*sband
;
1915 u16 ap_ht_cap_flags
;
1919 sta
= sta_info_get(sdata
, bssid
);
1920 if (WARN_ON(!sta
)) {
1925 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1927 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1928 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1930 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1934 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1935 bssid
, ap_ht_cap_flags
);
1938 /* Note: country IE parsing is done for us by cfg80211 */
1939 if (elems
.country_elem
) {
1940 /* TODO: IBSS also needs this */
1941 if (elems
.pwr_constr_elem
)
1942 ieee80211_handle_pwr_constr(sdata
,
1943 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1944 elems
.pwr_constr_elem
,
1945 elems
.pwr_constr_elem_len
);
1948 ieee80211_bss_info_change_notify(sdata
, changed
);
1951 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1952 struct sk_buff
*skb
)
1954 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1955 struct ieee80211_rx_status
*rx_status
;
1956 struct ieee80211_mgmt
*mgmt
;
1957 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1960 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1961 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1962 fc
= le16_to_cpu(mgmt
->frame_control
);
1964 mutex_lock(&ifmgd
->mtx
);
1966 if (ifmgd
->associated
&&
1967 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
1968 switch (fc
& IEEE80211_FCTL_STYPE
) {
1969 case IEEE80211_STYPE_BEACON
:
1970 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1973 case IEEE80211_STYPE_PROBE_RESP
:
1974 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
1976 case IEEE80211_STYPE_DEAUTH
:
1977 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1979 case IEEE80211_STYPE_DISASSOC
:
1980 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1982 case IEEE80211_STYPE_ACTION
:
1983 switch (mgmt
->u
.action
.category
) {
1984 case WLAN_CATEGORY_SPECTRUM_MGMT
:
1985 ieee80211_sta_process_chanswitch(sdata
,
1986 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1987 (void *)ifmgd
->associated
->priv
,
1988 rx_status
->mactime
);
1992 mutex_unlock(&ifmgd
->mtx
);
1998 case RX_MGMT_CFG80211_DEAUTH
:
1999 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2001 case RX_MGMT_CFG80211_DISASSOC
:
2002 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2005 WARN(1, "unexpected: %d", rma
);
2010 mutex_unlock(&ifmgd
->mtx
);
2012 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
2013 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
2014 struct ieee80211_local
*local
= sdata
->local
;
2015 struct ieee80211_work
*wk
;
2017 mutex_lock(&local
->mtx
);
2018 list_for_each_entry(wk
, &local
->work_list
, list
) {
2019 if (wk
->sdata
!= sdata
)
2022 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2023 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2026 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2028 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2032 * Printing the message only here means we can't
2033 * spuriously print it, but it also means that it
2034 * won't be printed when the frame comes in before
2035 * we even tried to associate or in similar cases.
2037 * Ultimately, I suspect cfg80211 should print the
2041 "%s: deauthenticated from %pM (Reason: %u)\n",
2042 sdata
->name
, mgmt
->bssid
,
2043 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2045 list_del_rcu(&wk
->list
);
2049 mutex_unlock(&local
->mtx
);
2051 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2055 static void ieee80211_sta_timer(unsigned long data
)
2057 struct ieee80211_sub_if_data
*sdata
=
2058 (struct ieee80211_sub_if_data
*) data
;
2059 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2060 struct ieee80211_local
*local
= sdata
->local
;
2062 if (local
->quiescing
) {
2063 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2067 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2070 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2071 u8
*bssid
, u8 reason
)
2073 struct ieee80211_local
*local
= sdata
->local
;
2074 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2076 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2077 IEEE80211_STA_BEACON_POLL
);
2079 ieee80211_set_disassoc(sdata
, true, true);
2080 mutex_unlock(&ifmgd
->mtx
);
2081 mutex_lock(&local
->mtx
);
2082 ieee80211_recalc_idle(local
);
2083 mutex_unlock(&local
->mtx
);
2085 * must be outside lock due to cfg80211,
2086 * but that's not a problem.
2088 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2089 IEEE80211_STYPE_DEAUTH
, reason
,
2091 mutex_lock(&ifmgd
->mtx
);
2094 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2096 struct ieee80211_local
*local
= sdata
->local
;
2097 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2099 /* then process the rest of the work */
2100 mutex_lock(&ifmgd
->mtx
);
2102 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2103 IEEE80211_STA_CONNECTION_POLL
) &&
2104 ifmgd
->associated
) {
2108 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2110 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2111 max_tries
= max_nullfunc_tries
;
2113 max_tries
= max_probe_tries
;
2115 /* ACK received for nullfunc probing frame */
2116 if (!ifmgd
->probe_send_count
)
2117 ieee80211_reset_ap_probe(sdata
);
2118 else if (ifmgd
->nullfunc_failed
) {
2119 if (ifmgd
->probe_send_count
< max_tries
) {
2120 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2121 wiphy_debug(local
->hw
.wiphy
,
2122 "%s: No ack for nullfunc frame to"
2123 " AP %pM, try %d/%i\n",
2125 ifmgd
->probe_send_count
, max_tries
);
2127 ieee80211_mgd_probe_ap_send(sdata
);
2129 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2130 wiphy_debug(local
->hw
.wiphy
,
2131 "%s: No ack for nullfunc frame to"
2132 " AP %pM, disconnecting.\n",
2133 sdata
->name
, bssid
);
2135 ieee80211_sta_connection_lost(sdata
, bssid
,
2136 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2138 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2139 run_again(ifmgd
, ifmgd
->probe_timeout
);
2140 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2141 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2142 wiphy_debug(local
->hw
.wiphy
,
2143 "%s: Failed to send nullfunc to AP %pM"
2144 " after %dms, disconnecting.\n",
2146 bssid
, probe_wait_ms
);
2148 ieee80211_sta_connection_lost(sdata
, bssid
,
2149 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2150 } else if (ifmgd
->probe_send_count
< max_tries
) {
2151 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2152 wiphy_debug(local
->hw
.wiphy
,
2153 "%s: No probe response from AP %pM"
2154 " after %dms, try %d/%i\n",
2156 bssid
, probe_wait_ms
,
2157 ifmgd
->probe_send_count
, max_tries
);
2159 ieee80211_mgd_probe_ap_send(sdata
);
2162 * We actually lost the connection ... or did we?
2165 wiphy_debug(local
->hw
.wiphy
,
2166 "%s: No probe response from AP %pM"
2167 " after %dms, disconnecting.\n",
2169 bssid
, probe_wait_ms
);
2171 ieee80211_sta_connection_lost(sdata
, bssid
,
2172 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2176 mutex_unlock(&ifmgd
->mtx
);
2179 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2181 struct ieee80211_sub_if_data
*sdata
=
2182 (struct ieee80211_sub_if_data
*) data
;
2183 struct ieee80211_local
*local
= sdata
->local
;
2185 if (local
->quiescing
)
2188 ieee80211_queue_work(&sdata
->local
->hw
,
2189 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2192 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2194 struct ieee80211_sub_if_data
*sdata
=
2195 (struct ieee80211_sub_if_data
*) data
;
2196 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2197 struct ieee80211_local
*local
= sdata
->local
;
2199 if (local
->quiescing
)
2202 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2205 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2207 struct ieee80211_sub_if_data
*sdata
=
2208 container_of(work
, struct ieee80211_sub_if_data
,
2209 u
.mgd
.monitor_work
);
2211 ieee80211_mgd_probe_ap(sdata
, false);
2214 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2216 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2217 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2218 IEEE80211_STA_CONNECTION_POLL
);
2220 /* let's probe the connection once */
2221 ieee80211_queue_work(&sdata
->local
->hw
,
2222 &sdata
->u
.mgd
.monitor_work
);
2223 /* and do all the other regular work too */
2224 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2229 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2231 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2234 * we need to use atomic bitops for the running bits
2235 * only because both timers might fire at the same
2236 * time -- the code here is properly synchronised.
2239 cancel_work_sync(&ifmgd
->request_smps_work
);
2241 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2242 if (del_timer_sync(&ifmgd
->timer
))
2243 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2245 cancel_work_sync(&ifmgd
->chswitch_work
);
2246 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2247 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2249 cancel_work_sync(&ifmgd
->monitor_work
);
2250 /* these will just be re-established on connection */
2251 del_timer_sync(&ifmgd
->conn_mon_timer
);
2252 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2255 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2257 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2259 if (!ifmgd
->associated
)
2262 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2263 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2264 mutex_lock(&ifmgd
->mtx
);
2265 if (ifmgd
->associated
) {
2266 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2267 wiphy_debug(sdata
->local
->hw
.wiphy
,
2268 "%s: driver requested disconnect after resume.\n",
2271 ieee80211_sta_connection_lost(sdata
,
2272 ifmgd
->associated
->bssid
,
2273 WLAN_REASON_UNSPECIFIED
);
2274 mutex_unlock(&ifmgd
->mtx
);
2277 mutex_unlock(&ifmgd
->mtx
);
2280 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2281 add_timer(&ifmgd
->timer
);
2282 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2283 add_timer(&ifmgd
->chswitch_timer
);
2284 ieee80211_sta_reset_beacon_monitor(sdata
);
2285 ieee80211_restart_sta_timer(sdata
);
2286 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2290 /* interface setup */
2291 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2293 struct ieee80211_if_managed
*ifmgd
;
2295 ifmgd
= &sdata
->u
.mgd
;
2296 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2297 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2298 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2299 ieee80211_beacon_connection_loss_work
);
2300 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2301 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2302 (unsigned long) sdata
);
2303 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2304 (unsigned long) sdata
);
2305 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2306 (unsigned long) sdata
);
2307 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2308 (unsigned long) sdata
);
2312 mutex_init(&ifmgd
->mtx
);
2314 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2315 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2317 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2320 /* scan finished notification */
2321 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2323 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2325 /* Restart STA timers */
2327 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2328 ieee80211_restart_sta_timer(sdata
);
2332 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2333 unsigned long data
, void *dummy
)
2335 s32 latency_usec
= (s32
) data
;
2336 struct ieee80211_local
*local
=
2337 container_of(nb
, struct ieee80211_local
,
2338 network_latency_notifier
);
2340 mutex_lock(&local
->iflist_mtx
);
2341 ieee80211_recalc_ps(local
, latency_usec
);
2342 mutex_unlock(&local
->iflist_mtx
);
2348 static enum work_done_result
2349 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2350 struct sk_buff
*skb
)
2352 struct ieee80211_local
*local
= wk
->sdata
->local
;
2355 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2359 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2360 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2364 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2365 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2366 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2368 wk
->type
= IEEE80211_WORK_AUTH
;
2369 wk
->probe_auth
.tries
= 0;
2370 return WORK_DONE_REQUEUE
;
2372 if (wk
->probe_auth
.synced
)
2373 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2374 IEEE80211_TX_SYNC_AUTH
);
2376 return WORK_DONE_DESTROY
;
2379 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2380 struct cfg80211_auth_request
*req
)
2383 struct ieee80211_work
*wk
;
2386 if (req
->local_state_change
)
2387 return 0; /* no need to update mac80211 state */
2389 switch (req
->auth_type
) {
2390 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2391 auth_alg
= WLAN_AUTH_OPEN
;
2393 case NL80211_AUTHTYPE_SHARED_KEY
:
2394 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2396 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2398 case NL80211_AUTHTYPE_FT
:
2399 auth_alg
= WLAN_AUTH_FT
;
2401 case NL80211_AUTHTYPE_NETWORK_EAP
:
2402 auth_alg
= WLAN_AUTH_LEAP
;
2408 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2412 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2414 if (req
->ie
&& req
->ie_len
) {
2415 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2416 wk
->ie_len
= req
->ie_len
;
2419 if (req
->key
&& req
->key_len
) {
2420 wk
->probe_auth
.key_len
= req
->key_len
;
2421 wk
->probe_auth
.key_idx
= req
->key_idx
;
2422 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2425 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2426 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2427 wk
->probe_auth
.ssid_len
= ssid
[1];
2429 wk
->probe_auth
.algorithm
= auth_alg
;
2430 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2432 /* if we already have a probe, don't probe again */
2433 if (req
->bss
->proberesp_ies
)
2434 wk
->type
= IEEE80211_WORK_AUTH
;
2436 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2437 wk
->chan
= req
->bss
->channel
;
2438 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2440 wk
->done
= ieee80211_probe_auth_done
;
2442 ieee80211_add_work(wk
);
2446 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2447 struct sk_buff
*skb
)
2449 struct ieee80211_local
*local
= wk
->sdata
->local
;
2450 struct ieee80211_mgmt
*mgmt
;
2451 struct ieee80211_rx_status
*rx_status
;
2452 struct ieee802_11_elems elems
;
2456 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2460 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2461 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2462 rx_status
= (void *) skb
->cb
;
2463 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2464 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2466 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2468 wk
->type
= IEEE80211_WORK_ASSOC
;
2469 /* not really done yet */
2470 return WORK_DONE_REQUEUE
;
2473 mgmt
= (void *)skb
->data
;
2474 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2476 if (status
== WLAN_STATUS_SUCCESS
) {
2477 if (wk
->assoc
.synced
)
2478 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2479 IEEE80211_TX_SYNC_ASSOC
);
2481 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2482 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2483 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2484 /* oops -- internal error -- send timeout for now */
2485 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2487 return WORK_DONE_DESTROY
;
2490 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2493 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2495 if (wk
->assoc
.synced
)
2496 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2497 IEEE80211_TX_SYNC_ASSOC
);
2499 return WORK_DONE_DESTROY
;
2502 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2503 struct cfg80211_assoc_request
*req
)
2505 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2506 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2507 struct ieee80211_work
*wk
;
2511 mutex_lock(&ifmgd
->mtx
);
2512 if (ifmgd
->associated
) {
2513 if (!req
->prev_bssid
||
2514 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2517 * We are already associated and the request was not a
2518 * reassociation request from the current BSS, so
2521 mutex_unlock(&ifmgd
->mtx
);
2525 /* Trying to reassociate - clear previous association state */
2526 ieee80211_set_disassoc(sdata
, true, false);
2528 mutex_unlock(&ifmgd
->mtx
);
2530 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2534 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2535 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2537 ifmgd
->beacon_crc_valid
= false;
2539 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2540 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2541 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2542 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2543 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2546 if (req
->ie
&& req
->ie_len
) {
2547 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2548 wk
->ie_len
= req
->ie_len
;
2552 wk
->assoc
.bss
= req
->bss
;
2554 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2556 /* new association always uses requested smps mode */
2557 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2558 if (ifmgd
->powersave
)
2559 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2561 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2563 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2565 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2567 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2568 * We still associate in non-HT mode (11a/b/g) if any one of these
2569 * ciphers is configured as pairwise.
2570 * We can set this to true for non-11n hardware, that'll be checked
2571 * separately along with the peer capabilities.
2573 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2574 wk
->assoc
.capability
= req
->bss
->capability
;
2575 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2576 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2577 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2578 wk
->assoc
.ht_information_ie
=
2579 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2581 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2582 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2583 wk
->assoc
.uapsd_used
= true;
2584 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2586 wk
->assoc
.uapsd_used
= false;
2587 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2590 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2591 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2592 wk
->assoc
.ssid_len
= ssid
[1];
2594 if (req
->prev_bssid
)
2595 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2597 wk
->chan
= req
->bss
->channel
;
2598 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2600 wk
->done
= ieee80211_assoc_done
;
2601 if (!bss
->dtim_period
&&
2602 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2603 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2605 wk
->type
= IEEE80211_WORK_ASSOC
;
2608 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2609 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2611 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2612 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2615 if (req
->crypto
.control_port
)
2616 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2618 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2620 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2621 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2623 ieee80211_add_work(wk
);
2627 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2628 struct cfg80211_deauth_request
*req
,
2631 struct ieee80211_local
*local
= sdata
->local
;
2632 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2633 struct ieee80211_work
*wk
;
2635 bool assoc_bss
= false;
2637 mutex_lock(&ifmgd
->mtx
);
2639 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2640 if (ifmgd
->associated
== req
->bss
) {
2641 ieee80211_set_disassoc(sdata
, false, true);
2642 mutex_unlock(&ifmgd
->mtx
);
2645 bool not_auth_yet
= false;
2647 mutex_unlock(&ifmgd
->mtx
);
2649 mutex_lock(&local
->mtx
);
2650 list_for_each_entry(wk
, &local
->work_list
, list
) {
2651 if (wk
->sdata
!= sdata
)
2654 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2655 wk
->type
!= IEEE80211_WORK_AUTH
&&
2656 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2657 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2660 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2663 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2664 list_del_rcu(&wk
->list
);
2668 mutex_unlock(&local
->mtx
);
2671 * If somebody requests authentication and we haven't
2672 * sent out an auth frame yet there's no need to send
2673 * out a deauth frame either. If the state was PROBE,
2674 * then this is the case. If it's AUTH we have sent a
2675 * frame, and if it's IDLE we have completed the auth
2679 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2684 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2685 sdata
->name
, bssid
, req
->reason_code
);
2687 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2688 req
->reason_code
, cookie
,
2689 !req
->local_state_change
);
2691 sta_info_destroy_addr(sdata
, bssid
);
2693 mutex_lock(&sdata
->local
->mtx
);
2694 ieee80211_recalc_idle(sdata
->local
);
2695 mutex_unlock(&sdata
->local
->mtx
);
2700 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2701 struct cfg80211_disassoc_request
*req
,
2704 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2707 mutex_lock(&ifmgd
->mtx
);
2710 * cfg80211 should catch this ... but it's racy since
2711 * we can receive a disassoc frame, process it, hand it
2712 * to cfg80211 while that's in a locked section already
2713 * trying to tell us that the user wants to disconnect.
2715 if (ifmgd
->associated
!= req
->bss
) {
2716 mutex_unlock(&ifmgd
->mtx
);
2720 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2721 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2723 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2724 ieee80211_set_disassoc(sdata
, false, true);
2726 mutex_unlock(&ifmgd
->mtx
);
2728 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2729 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2730 cookie
, !req
->local_state_change
);
2731 sta_info_destroy_addr(sdata
, bssid
);
2733 mutex_lock(&sdata
->local
->mtx
);
2734 ieee80211_recalc_idle(sdata
->local
);
2735 mutex_unlock(&sdata
->local
->mtx
);
2740 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2741 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2744 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2746 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2748 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2750 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2752 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2754 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2755 return sdata
->dev
->operstate
;
2757 EXPORT_SYMBOL(ieee80211_get_operstate
);