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.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
,
164 bool beacon_htcap_ie
)
166 struct ieee80211_local
*local
= sdata
->local
;
167 struct ieee80211_supported_band
*sband
;
168 struct sta_info
*sta
;
172 bool enable_ht
= true;
173 enum nl80211_channel_type prev_chantype
;
174 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
176 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
178 prev_chantype
= sdata
->vif
.bss_conf
.channel_type
;
180 /* HT is not supported */
181 if (!sband
->ht_cap
.ht_supported
)
185 hti_cfreq
= ieee80211_channel_to_frequency(hti
->control_chan
,
187 /* check that channel matches the right operating channel */
188 if (local
->hw
.conf
.channel
->center_freq
!= hti_cfreq
) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
199 local
->hw
.conf
.channel
->center_freq
,
200 hti_cfreq
, hti
->control_chan
,
207 channel_type
= NL80211_CHAN_HT20
;
209 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
210 !ieee80111_cfg_override_disables_ht40(sdata
) &&
211 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
212 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
213 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
214 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
215 if (!(local
->hw
.conf
.channel
->flags
&
216 IEEE80211_CHAN_NO_HT40PLUS
))
217 channel_type
= NL80211_CHAN_HT40PLUS
;
219 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
220 if (!(local
->hw
.conf
.channel
->flags
&
221 IEEE80211_CHAN_NO_HT40MINUS
))
222 channel_type
= NL80211_CHAN_HT40MINUS
;
228 if (local
->tmp_channel
)
229 local
->tmp_channel_type
= channel_type
;
231 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
232 /* can only fail due to HT40+/- mismatch */
233 channel_type
= NL80211_CHAN_HT20
;
234 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, channel_type
));
237 if (beacon_htcap_ie
&& (prev_chantype
!= channel_type
)) {
239 * Whenever the AP announces the HT mode change that can be
240 * 40MHz intolerant or etc., it would be safer to stop tx
241 * queues before doing hw config to avoid buffer overflow.
243 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
244 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
246 /* flush out all packets */
249 drv_flush(local
, false);
252 /* channel_type change automatically detected */
253 ieee80211_hw_config(local
, 0);
255 if (prev_chantype
!= channel_type
) {
257 sta
= sta_info_get(sdata
, bssid
);
259 rate_control_rate_update(local
, sband
, sta
,
260 IEEE80211_RC_HT_CHANGED
,
265 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
266 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
269 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
271 /* if bss configuration changed store the new one */
272 if (sdata
->ht_opmode_valid
!= enable_ht
||
273 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
||
274 prev_chantype
!= channel_type
) {
275 changed
|= BSS_CHANGED_HT
;
276 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
277 sdata
->ht_opmode_valid
= enable_ht
;
283 /* frame sending functions */
285 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
286 const u8
*bssid
, u16 stype
, u16 reason
,
287 void *cookie
, bool send_frame
)
289 struct ieee80211_local
*local
= sdata
->local
;
290 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
292 struct ieee80211_mgmt
*mgmt
;
294 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
298 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
300 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
302 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
303 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
304 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
305 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
307 /* u.deauth.reason_code == u.disassoc.reason_code */
308 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
310 if (stype
== IEEE80211_STYPE_DEAUTH
)
312 __cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
314 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
317 __cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
319 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
320 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
321 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
324 ieee80211_tx_skb(sdata
, skb
);
329 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
330 struct ieee80211_sub_if_data
*sdata
)
332 struct ieee80211_pspoll
*pspoll
;
335 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
339 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
340 pspoll
->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 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
347 struct ieee80211_sub_if_data
*sdata
,
351 struct ieee80211_hdr_3addr
*nullfunc
;
352 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
354 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
358 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
360 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
362 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
363 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
364 IEEE80211_STA_CONNECTION_POLL
))
365 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
367 ieee80211_tx_skb(sdata
, skb
);
370 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
371 struct ieee80211_sub_if_data
*sdata
)
374 struct ieee80211_hdr
*nullfunc
;
377 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
380 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
384 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
386 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
387 memset(nullfunc
, 0, 30);
388 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
389 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
390 nullfunc
->frame_control
= fc
;
391 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
392 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
393 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
394 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
396 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
397 ieee80211_tx_skb(sdata
, skb
);
400 /* spectrum management related things */
401 static void ieee80211_chswitch_work(struct work_struct
*work
)
403 struct ieee80211_sub_if_data
*sdata
=
404 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
405 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
407 if (!ieee80211_sdata_running(sdata
))
410 mutex_lock(&ifmgd
->mtx
);
411 if (!ifmgd
->associated
)
414 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
415 if (!sdata
->local
->ops
->channel_switch
) {
416 /* call "hw_config" only if doing sw channel switch */
417 ieee80211_hw_config(sdata
->local
,
418 IEEE80211_CONF_CHANGE_CHANNEL
);
420 /* update the device channel directly */
421 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
424 /* XXX: shouldn't really modify cfg80211-owned data! */
425 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
427 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
428 IEEE80211_QUEUE_STOP_REASON_CSA
);
430 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
431 mutex_unlock(&ifmgd
->mtx
);
434 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
436 struct ieee80211_sub_if_data
*sdata
;
437 struct ieee80211_if_managed
*ifmgd
;
439 sdata
= vif_to_sdata(vif
);
440 ifmgd
= &sdata
->u
.mgd
;
442 trace_api_chswitch_done(sdata
, success
);
445 * If the channel switch was not successful, stay
446 * around on the old channel. We currently lack
447 * good handling of this situation, possibly we
448 * should just drop the association.
450 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
453 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
455 EXPORT_SYMBOL(ieee80211_chswitch_done
);
457 static void ieee80211_chswitch_timer(unsigned long data
)
459 struct ieee80211_sub_if_data
*sdata
=
460 (struct ieee80211_sub_if_data
*) data
;
461 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
463 if (sdata
->local
->quiescing
) {
464 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
468 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
471 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
472 struct ieee80211_channel_sw_ie
*sw_elem
,
473 struct ieee80211_bss
*bss
,
476 struct cfg80211_bss
*cbss
=
477 container_of((void *)bss
, struct cfg80211_bss
, priv
);
478 struct ieee80211_channel
*new_ch
;
479 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
480 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
481 cbss
->channel
->band
);
483 ASSERT_MGD_MTX(ifmgd
);
485 if (!ifmgd
->associated
)
488 if (sdata
->local
->scanning
)
491 /* Disregard subsequent beacons if we are already running a timer
494 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
497 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
498 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
501 sdata
->local
->csa_channel
= new_ch
;
503 if (sdata
->local
->ops
->channel_switch
) {
504 /* use driver's channel switch callback */
505 struct ieee80211_channel_switch ch_switch
;
506 memset(&ch_switch
, 0, sizeof(ch_switch
));
507 ch_switch
.timestamp
= timestamp
;
509 ch_switch
.block_tx
= true;
510 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
511 IEEE80211_QUEUE_STOP_REASON_CSA
);
513 ch_switch
.channel
= new_ch
;
514 ch_switch
.count
= sw_elem
->count
;
515 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
516 drv_channel_switch(sdata
->local
, &ch_switch
);
520 /* channel switch handled in software */
521 if (sw_elem
->count
<= 1) {
522 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
525 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
526 IEEE80211_QUEUE_STOP_REASON_CSA
);
527 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
528 mod_timer(&ifmgd
->chswitch_timer
,
530 msecs_to_jiffies(sw_elem
->count
*
531 cbss
->beacon_interval
));
535 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
536 u16 capab_info
, u8
*pwr_constr_elem
,
537 u8 pwr_constr_elem_len
)
539 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
541 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
544 /* Power constraint IE length should be 1 octet */
545 if (pwr_constr_elem_len
!= 1)
548 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
549 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
550 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
551 ieee80211_hw_config(sdata
->local
, 0);
555 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
557 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
558 struct ieee80211_local
*local
= sdata
->local
;
559 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
561 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
562 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
563 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
565 local
->disable_dynamic_ps
= false;
566 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
568 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
570 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
572 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
573 struct ieee80211_local
*local
= sdata
->local
;
574 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
576 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
577 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
578 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
580 local
->disable_dynamic_ps
= true;
581 conf
->dynamic_ps_timeout
= 0;
582 del_timer_sync(&local
->dynamic_ps_timer
);
583 ieee80211_queue_work(&local
->hw
,
584 &local
->dynamic_ps_enable_work
);
586 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
589 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
590 struct ieee80211_sub_if_data
*sdata
)
592 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
595 * If we are scanning right now then the parameters will
596 * take effect when scan finishes.
601 if (conf
->dynamic_ps_timeout
> 0 &&
602 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
603 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
604 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
606 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
607 ieee80211_send_nullfunc(local
, sdata
, 1);
609 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
610 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
613 conf
->flags
|= IEEE80211_CONF_PS
;
614 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
618 static void ieee80211_change_ps(struct ieee80211_local
*local
)
620 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
622 if (local
->ps_sdata
) {
623 ieee80211_enable_ps(local
, local
->ps_sdata
);
624 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
625 conf
->flags
&= ~IEEE80211_CONF_PS
;
626 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
627 del_timer_sync(&local
->dynamic_ps_timer
);
628 cancel_work_sync(&local
->dynamic_ps_enable_work
);
632 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
634 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
635 struct sta_info
*sta
= NULL
;
636 bool authorized
= false;
644 if (!mgd
->associated
)
647 if (!mgd
->associated
->beacon_ies
)
650 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
651 IEEE80211_STA_CONNECTION_POLL
))
655 sta
= sta_info_get(sdata
, mgd
->bssid
);
657 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
663 /* need to hold RTNL or interface lock */
664 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
666 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
670 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
671 local
->ps_sdata
= NULL
;
675 if (!list_empty(&local
->work_list
)) {
676 local
->ps_sdata
= NULL
;
680 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
681 if (!ieee80211_sdata_running(sdata
))
683 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
684 /* If an AP vif is found, then disable PS
685 * by setting the count to zero thereby setting
691 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
697 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
698 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
702 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
704 beaconint_us
= ieee80211_tu_to_usec(
705 found
->vif
.bss_conf
.beacon_int
);
707 timeout
= local
->dynamic_ps_forced_timeout
;
710 * Go to full PSM if the user configures a very low
711 * latency requirement.
712 * The 2000 second value is there for compatibility
713 * until the PM_QOS_NETWORK_LATENCY is configured
716 if (latency
> (1900 * USEC_PER_MSEC
) &&
717 latency
!= (2000 * USEC_PER_SEC
))
722 local
->dynamic_ps_user_timeout
= timeout
;
723 if (!local
->disable_dynamic_ps
)
724 conf
->dynamic_ps_timeout
=
725 local
->dynamic_ps_user_timeout
;
727 if (beaconint_us
> latency
) {
728 local
->ps_sdata
= NULL
;
730 struct ieee80211_bss
*bss
;
734 bss
= (void *)found
->u
.mgd
.associated
->priv
;
735 dtimper
= bss
->dtim_period
;
737 /* If the TIM IE is invalid, pretend the value is 1 */
740 else if (dtimper
> 1)
741 maxslp
= min_t(int, dtimper
,
742 latency
/ beaconint_us
);
744 local
->hw
.conf
.max_sleep_period
= maxslp
;
745 local
->hw
.conf
.ps_dtim_period
= dtimper
;
746 local
->ps_sdata
= found
;
749 local
->ps_sdata
= NULL
;
753 ieee80211_change_ps(local
);
756 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
758 struct ieee80211_local
*local
=
759 container_of(work
, struct ieee80211_local
,
760 dynamic_ps_disable_work
);
762 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
763 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
764 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
767 ieee80211_wake_queues_by_reason(&local
->hw
,
768 IEEE80211_QUEUE_STOP_REASON_PS
);
771 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
773 struct ieee80211_local
*local
=
774 container_of(work
, struct ieee80211_local
,
775 dynamic_ps_enable_work
);
776 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
777 struct ieee80211_if_managed
*ifmgd
;
781 /* can only happen when PS was just disabled anyway */
785 ifmgd
= &sdata
->u
.mgd
;
787 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
790 if (!local
->disable_dynamic_ps
&&
791 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
792 /* don't enter PS if TX frames are pending */
793 if (drv_tx_frames_pending(local
)) {
794 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
796 local
->hw
.conf
.dynamic_ps_timeout
));
801 * transmission can be stopped by others which leads to
802 * dynamic_ps_timer expiry. Postpone the ps timer if it
803 * is not the actual idle state.
805 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
806 for (q
= 0; q
< local
->hw
.queues
; q
++) {
807 if (local
->queue_stop_reasons
[q
]) {
808 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
810 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
812 local
->hw
.conf
.dynamic_ps_timeout
));
816 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
819 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
820 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
))) {
821 netif_tx_stop_all_queues(sdata
->dev
);
823 if (drv_tx_frames_pending(local
))
824 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
826 local
->hw
.conf
.dynamic_ps_timeout
));
828 ieee80211_send_nullfunc(local
, sdata
, 1);
829 /* Flush to get the tx status of nullfunc frame */
830 drv_flush(local
, false);
834 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
835 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
836 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
837 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
838 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
839 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
842 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
843 netif_tx_wake_all_queues(sdata
->dev
);
846 void ieee80211_dynamic_ps_timer(unsigned long data
)
848 struct ieee80211_local
*local
= (void *) data
;
850 if (local
->quiescing
|| local
->suspended
)
853 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
857 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
858 struct ieee80211_sub_if_data
*sdata
,
859 u8
*wmm_param
, size_t wmm_param_len
)
861 struct ieee80211_tx_queue_params params
;
862 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
865 u8
*pos
, uapsd_queues
= 0;
867 if (!local
->ops
->conf_tx
)
870 if (local
->hw
.queues
< 4)
876 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
879 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
880 uapsd_queues
= local
->uapsd_queues
;
882 count
= wmm_param
[6] & 0x0f;
883 if (count
== ifmgd
->wmm_last_param_set
)
885 ifmgd
->wmm_last_param_set
= count
;
888 left
= wmm_param_len
- 8;
890 memset(¶ms
, 0, sizeof(params
));
893 for (; left
>= 4; left
-= 4, pos
+= 4) {
894 int aci
= (pos
[0] >> 5) & 0x03;
895 int acm
= (pos
[0] >> 4) & 0x01;
903 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
904 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
910 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
911 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
917 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
918 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
925 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
926 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
931 params
.aifs
= pos
[0] & 0x0f;
932 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
933 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
934 params
.txop
= get_unaligned_le16(pos
+ 2);
935 params
.uapsd
= uapsd
;
937 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
938 wiphy_debug(local
->hw
.wiphy
,
939 "WMM queue=%d aci=%d acm=%d aifs=%d "
940 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
942 params
.aifs
, params
.cw_min
, params
.cw_max
,
943 params
.txop
, params
.uapsd
);
945 sdata
->tx_conf
[queue
] = params
;
946 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
947 wiphy_debug(local
->hw
.wiphy
,
948 "failed to set TX queue parameters for queue %d\n",
952 /* enable WMM or activate new settings */
953 sdata
->vif
.bss_conf
.qos
= true;
954 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
957 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
958 u16 capab
, bool erp_valid
, u8 erp
)
960 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
963 bool use_short_preamble
;
967 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
968 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
970 use_protection
= false;
971 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
974 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
975 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
976 use_short_slot
= true;
978 if (use_protection
!= bss_conf
->use_cts_prot
) {
979 bss_conf
->use_cts_prot
= use_protection
;
980 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
983 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
984 bss_conf
->use_short_preamble
= use_short_preamble
;
985 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
988 if (use_short_slot
!= bss_conf
->use_short_slot
) {
989 bss_conf
->use_short_slot
= use_short_slot
;
990 changed
|= BSS_CHANGED_ERP_SLOT
;
996 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
997 struct cfg80211_bss
*cbss
,
998 u32 bss_info_changed
)
1000 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1001 struct ieee80211_local
*local
= sdata
->local
;
1002 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1004 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1005 /* set timing information */
1006 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1007 bss_conf
->timestamp
= cbss
->tsf
;
1009 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1010 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1011 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1013 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1014 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1016 sdata
->u
.mgd
.associated
= cbss
;
1017 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1019 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1021 /* just to be sure */
1022 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1023 IEEE80211_STA_BEACON_POLL
);
1025 ieee80211_led_assoc(local
, 1);
1027 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1028 bss_conf
->dtim_period
= bss
->dtim_period
;
1030 bss_conf
->dtim_period
= 0;
1032 bss_conf
->assoc
= 1;
1034 * For now just always ask the driver to update the basic rateset
1035 * when we have associated, we aren't checking whether it actually
1038 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1040 /* And the BSSID changed - we're associated now */
1041 bss_info_changed
|= BSS_CHANGED_BSSID
;
1043 /* Tell the driver to monitor connection quality (if supported) */
1044 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1045 bss_conf
->cqm_rssi_thold
)
1046 bss_info_changed
|= BSS_CHANGED_CQM
;
1048 /* Enable ARP filtering */
1049 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1050 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1051 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1054 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1056 mutex_lock(&local
->iflist_mtx
);
1057 ieee80211_recalc_ps(local
, -1);
1058 ieee80211_recalc_smps(local
);
1059 mutex_unlock(&local
->iflist_mtx
);
1061 netif_tx_start_all_queues(sdata
->dev
);
1062 netif_carrier_on(sdata
->dev
);
1065 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1066 bool remove_sta
, bool tx
)
1068 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1069 struct ieee80211_local
*local
= sdata
->local
;
1070 struct sta_info
*sta
;
1071 u32 changed
= 0, config_changed
= 0;
1074 ASSERT_MGD_MTX(ifmgd
);
1076 if (WARN_ON(!ifmgd
->associated
))
1079 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1081 ifmgd
->associated
= NULL
;
1082 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1085 * we need to commit the associated = NULL change because the
1086 * scan code uses that to determine whether this iface should
1087 * go to/wake up from powersave or not -- and could otherwise
1088 * wake the queues erroneously.
1093 * Thus, we can only afterwards stop the queues -- to account
1094 * for the case where another CPU is finishing a scan at this
1095 * time -- we don't want the scan code to enable queues.
1098 netif_tx_stop_all_queues(sdata
->dev
);
1099 netif_carrier_off(sdata
->dev
);
1101 mutex_lock(&local
->sta_mtx
);
1102 sta
= sta_info_get(sdata
, bssid
);
1104 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1105 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1107 mutex_unlock(&local
->sta_mtx
);
1109 changed
|= ieee80211_reset_erp_info(sdata
);
1111 ieee80211_led_assoc(local
, 0);
1112 changed
|= BSS_CHANGED_ASSOC
;
1113 sdata
->vif
.bss_conf
.assoc
= false;
1115 ieee80211_set_wmm_default(sdata
);
1117 /* channel(_type) changes are handled by ieee80211_hw_config */
1118 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1120 /* on the next assoc, re-program HT parameters */
1121 sdata
->ht_opmode_valid
= false;
1122 memset(&ifmgd
->ht_capa
, 0, sizeof(ifmgd
->ht_capa
));
1123 memset(&ifmgd
->ht_capa_mask
, 0, sizeof(ifmgd
->ht_capa_mask
));
1125 local
->power_constr_level
= 0;
1127 del_timer_sync(&local
->dynamic_ps_timer
);
1128 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1130 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1131 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1132 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1134 local
->ps_sdata
= NULL
;
1136 ieee80211_hw_config(local
, config_changed
);
1138 /* Disable ARP filtering */
1139 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1140 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1141 changed
|= BSS_CHANGED_ARP_FILTER
;
1144 /* The BSSID (not really interesting) and HT changed */
1145 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1146 ieee80211_bss_info_change_notify(sdata
, changed
);
1148 /* remove AP and TDLS peers */
1150 sta_info_flush(local
, sdata
);
1152 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1153 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1154 del_timer_sync(&sdata
->u
.mgd
.timer
);
1155 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1158 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1159 struct ieee80211_hdr
*hdr
)
1162 * We can postpone the mgd.timer whenever receiving unicast frames
1163 * from AP because we know that the connection is working both ways
1164 * at that time. But multicast frames (and hence also beacons) must
1165 * be ignored here, because we need to trigger the timer during
1166 * data idle periods for sending the periodic probe request to the
1167 * AP we're connected to.
1169 if (is_multicast_ether_addr(hdr
->addr1
))
1172 ieee80211_sta_reset_conn_monitor(sdata
);
1175 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1177 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1179 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1180 IEEE80211_STA_CONNECTION_POLL
)))
1183 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1184 IEEE80211_STA_BEACON_POLL
);
1185 mutex_lock(&sdata
->local
->iflist_mtx
);
1186 ieee80211_recalc_ps(sdata
->local
, -1);
1187 mutex_unlock(&sdata
->local
->iflist_mtx
);
1189 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1193 * We've received a probe response, but are not sure whether
1194 * we have or will be receiving any beacons or data, so let's
1195 * schedule the timers again, just in case.
1197 ieee80211_sta_reset_beacon_monitor(sdata
);
1199 mod_timer(&ifmgd
->conn_mon_timer
,
1200 round_jiffies_up(jiffies
+
1201 IEEE80211_CONNECTION_IDLE_TIME
));
1204 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1205 struct ieee80211_hdr
*hdr
, bool ack
)
1207 if (!ieee80211_is_data(hdr
->frame_control
))
1211 ieee80211_sta_reset_conn_monitor(sdata
);
1213 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1214 sdata
->u
.mgd
.probe_send_count
> 0) {
1216 sdata
->u
.mgd
.probe_send_count
= 0;
1218 sdata
->u
.mgd
.nullfunc_failed
= true;
1219 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1223 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1225 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1227 u8
*dst
= ifmgd
->associated
->bssid
;
1228 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1231 * Try sending broadcast probe requests for the last three
1232 * probe requests after the first ones failed since some
1233 * buggy APs only support broadcast probe requests.
1235 if (ifmgd
->probe_send_count
>= unicast_limit
)
1239 * When the hardware reports an accurate Tx ACK status, it's
1240 * better to send a nullfunc frame instead of a probe request,
1241 * as it will kick us off the AP quickly if we aren't associated
1242 * anymore. The timeout will be reset if the frame is ACKed by
1245 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1246 ifmgd
->nullfunc_failed
= false;
1247 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1249 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1250 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1251 (u32
) -1, true, false);
1254 ifmgd
->probe_send_count
++;
1255 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1256 run_again(ifmgd
, ifmgd
->probe_timeout
);
1259 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1262 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1263 bool already
= false;
1265 if (!ieee80211_sdata_running(sdata
))
1268 if (sdata
->local
->scanning
)
1271 if (sdata
->local
->tmp_channel
)
1274 mutex_lock(&ifmgd
->mtx
);
1276 if (!ifmgd
->associated
)
1279 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1280 if (beacon
&& net_ratelimit())
1281 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1282 "- sending probe request\n", sdata
->name
);
1286 * The driver/our work has already reported this event or the
1287 * connection monitoring has kicked in and we have already sent
1288 * a probe request. Or maybe the AP died and the driver keeps
1289 * reporting until we disassociate...
1291 * In either case we have to ignore the current call to this
1292 * function (except for setting the correct probe reason bit)
1293 * because otherwise we would reset the timer every time and
1294 * never check whether we received a probe response!
1296 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1297 IEEE80211_STA_CONNECTION_POLL
))
1301 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1303 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1308 mutex_lock(&sdata
->local
->iflist_mtx
);
1309 ieee80211_recalc_ps(sdata
->local
, -1);
1310 mutex_unlock(&sdata
->local
->iflist_mtx
);
1312 ifmgd
->probe_send_count
= 0;
1313 ieee80211_mgd_probe_ap_send(sdata
);
1315 mutex_unlock(&ifmgd
->mtx
);
1318 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1319 struct ieee80211_vif
*vif
)
1321 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1322 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1323 struct sk_buff
*skb
;
1326 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1329 ASSERT_MGD_MTX(ifmgd
);
1331 if (!ifmgd
->associated
)
1334 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1335 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1336 (u32
) -1, ssid
+ 2, ssid
[1],
1341 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1343 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1345 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1346 struct ieee80211_local
*local
= sdata
->local
;
1349 mutex_lock(&ifmgd
->mtx
);
1350 if (!ifmgd
->associated
) {
1351 mutex_unlock(&ifmgd
->mtx
);
1355 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1357 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1358 sdata
->name
, bssid
);
1360 ieee80211_set_disassoc(sdata
, true, true);
1361 mutex_unlock(&ifmgd
->mtx
);
1364 * must be outside lock due to cfg80211,
1365 * but that's not a problem.
1367 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1368 IEEE80211_STYPE_DEAUTH
,
1369 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1372 mutex_lock(&local
->mtx
);
1373 ieee80211_recalc_idle(local
);
1374 mutex_unlock(&local
->mtx
);
1377 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1379 struct ieee80211_sub_if_data
*sdata
=
1380 container_of(work
, struct ieee80211_sub_if_data
,
1381 u
.mgd
.beacon_connection_loss_work
);
1383 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1384 __ieee80211_connection_loss(sdata
);
1386 ieee80211_mgd_probe_ap(sdata
, true);
1389 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1391 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1392 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1394 trace_api_beacon_loss(sdata
);
1396 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1397 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1399 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1401 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1403 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1404 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1406 trace_api_connection_loss(sdata
);
1408 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1409 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1411 EXPORT_SYMBOL(ieee80211_connection_loss
);
1414 static enum rx_mgmt_action __must_check
1415 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1416 struct ieee80211_mgmt
*mgmt
, size_t len
)
1418 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1419 const u8
*bssid
= NULL
;
1423 return RX_MGMT_NONE
;
1425 ASSERT_MGD_MTX(ifmgd
);
1427 bssid
= ifmgd
->associated
->bssid
;
1429 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1431 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1432 sdata
->name
, bssid
, reason_code
);
1434 ieee80211_set_disassoc(sdata
, true, false);
1435 mutex_lock(&sdata
->local
->mtx
);
1436 ieee80211_recalc_idle(sdata
->local
);
1437 mutex_unlock(&sdata
->local
->mtx
);
1439 return RX_MGMT_CFG80211_DEAUTH
;
1443 static enum rx_mgmt_action __must_check
1444 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1445 struct ieee80211_mgmt
*mgmt
, size_t len
)
1447 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1451 return RX_MGMT_NONE
;
1453 ASSERT_MGD_MTX(ifmgd
);
1455 if (WARN_ON(!ifmgd
->associated
))
1456 return RX_MGMT_NONE
;
1458 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1459 return RX_MGMT_NONE
;
1461 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1463 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1464 sdata
->name
, mgmt
->sa
, reason_code
);
1466 ieee80211_set_disassoc(sdata
, true, false);
1467 mutex_lock(&sdata
->local
->mtx
);
1468 ieee80211_recalc_idle(sdata
->local
);
1469 mutex_unlock(&sdata
->local
->mtx
);
1470 return RX_MGMT_CFG80211_DISASSOC
;
1473 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1474 u8
*supp_rates
, unsigned int supp_rates_len
,
1475 u32
*rates
, u32
*basic_rates
,
1476 bool *have_higher_than_11mbit
,
1477 int *min_rate
, int *min_rate_index
)
1481 for (i
= 0; i
< supp_rates_len
; i
++) {
1482 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1483 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1486 *have_higher_than_11mbit
= true;
1489 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1490 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1492 * Note: Even through the membership selector and the basic
1493 * rate flag share the same bit, they are not exactly
1496 if (!!(supp_rates
[i
] & 0x80) &&
1497 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1500 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1501 if (sband
->bitrates
[j
].bitrate
== rate
) {
1504 *basic_rates
|= BIT(j
);
1505 if (rate
< *min_rate
) {
1507 *min_rate_index
= j
;
1515 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1516 struct ieee80211_mgmt
*mgmt
, size_t len
)
1518 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1519 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1520 struct ieee80211_local
*local
= sdata
->local
;
1521 struct ieee80211_supported_band
*sband
;
1522 struct sta_info
*sta
;
1523 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1525 u32 rates
, basic_rates
;
1526 u16 capab_info
, aid
;
1527 struct ieee802_11_elems elems
;
1528 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1531 bool have_higher_than_11mbit
= false;
1532 u16 ap_ht_cap_flags
;
1533 int min_rate
= INT_MAX
, min_rate_index
= -1;
1535 /* AssocResp and ReassocResp have identical structure */
1537 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1538 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1540 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1542 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1544 aid
&= ~(BIT(15) | BIT(14));
1546 ifmgd
->broken_ap
= false;
1548 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1550 "%s: invalid AID value %d (out of range), turn off PS\n",
1553 ifmgd
->broken_ap
= true;
1556 pos
= mgmt
->u
.assoc_resp
.variable
;
1557 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1559 if (!elems
.supp_rates
) {
1560 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1567 mutex_lock(&sdata
->local
->sta_mtx
);
1569 * station info was already allocated and inserted before
1570 * the association and should be available to us
1572 sta
= sta_info_get_rx(sdata
, cbss
->bssid
);
1573 if (WARN_ON(!sta
)) {
1574 mutex_unlock(&sdata
->local
->sta_mtx
);
1578 set_sta_flag(sta
, WLAN_STA_AUTH
);
1579 set_sta_flag(sta
, WLAN_STA_ASSOC
);
1580 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1581 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1585 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1587 ieee80211_get_rates(sband
, elems
.supp_rates
, elems
.supp_rates_len
,
1588 &rates
, &basic_rates
, &have_higher_than_11mbit
,
1589 &min_rate
, &min_rate_index
);
1591 ieee80211_get_rates(sband
, elems
.ext_supp_rates
,
1592 elems
.ext_supp_rates_len
, &rates
, &basic_rates
,
1593 &have_higher_than_11mbit
,
1594 &min_rate
, &min_rate_index
);
1597 * some buggy APs don't advertise basic_rates. use the lowest
1598 * supported rate instead.
1600 if (unlikely(!basic_rates
) && min_rate_index
>= 0) {
1601 printk(KERN_DEBUG
"%s: No basic rates in AssocResp. "
1602 "Using min supported rate instead.\n", sdata
->name
);
1603 basic_rates
= BIT(min_rate_index
);
1606 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1607 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1609 /* cf. IEEE 802.11 9.2.12 */
1610 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1611 have_higher_than_11mbit
)
1612 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1614 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1616 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1617 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
1618 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1620 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1622 rate_control_rate_init(sta
);
1624 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1625 set_sta_flag(sta
, WLAN_STA_MFP
);
1627 if (elems
.wmm_param
)
1628 set_sta_flag(sta
, WLAN_STA_WME
);
1630 /* sta_info_reinsert will also unlock the mutex lock */
1631 err
= sta_info_reinsert(sta
);
1634 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1635 " the AP (error %d)\n", sdata
->name
, err
);
1640 * Always handle WMM once after association regardless
1641 * of the first value the AP uses. Setting -1 here has
1642 * that effect because the AP values is an unsigned
1645 ifmgd
->wmm_last_param_set
= -1;
1647 if (elems
.wmm_param
)
1648 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1649 elems
.wmm_param_len
);
1651 ieee80211_set_wmm_default(sdata
);
1653 local
->oper_channel
= wk
->chan
;
1655 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1656 (sdata
->local
->hw
.queues
>= 4) &&
1657 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1658 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1659 cbss
->bssid
, ap_ht_cap_flags
,
1662 /* set AID and assoc capability,
1663 * ieee80211_set_associated() will tell the driver */
1664 bss_conf
->aid
= aid
;
1665 bss_conf
->assoc_capability
= capab_info
;
1666 ieee80211_set_associated(sdata
, cbss
, changed
);
1669 * If we're using 4-addr mode, let the AP know that we're
1670 * doing so, so that it can create the STA VLAN on its side
1672 if (ifmgd
->use_4addr
)
1673 ieee80211_send_4addr_nullfunc(local
, sdata
);
1676 * Start timer to probe the connection to the AP now.
1677 * Also start the timer that will detect beacon loss.
1679 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1680 ieee80211_sta_reset_beacon_monitor(sdata
);
1686 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1687 struct ieee80211_mgmt
*mgmt
,
1689 struct ieee80211_rx_status
*rx_status
,
1690 struct ieee802_11_elems
*elems
,
1693 struct ieee80211_local
*local
= sdata
->local
;
1695 struct ieee80211_bss
*bss
;
1696 struct ieee80211_channel
*channel
;
1697 bool need_ps
= false;
1699 if (sdata
->u
.mgd
.associated
) {
1700 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1701 /* not previously set so we may need to recalc */
1702 need_ps
= !bss
->dtim_period
;
1705 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1706 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1709 freq
= rx_status
->freq
;
1711 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1713 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1716 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1719 ieee80211_rx_bss_put(local
, bss
);
1721 if (!sdata
->u
.mgd
.associated
)
1725 mutex_lock(&local
->iflist_mtx
);
1726 ieee80211_recalc_ps(local
, -1);
1727 mutex_unlock(&local
->iflist_mtx
);
1730 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1731 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1733 struct ieee80211_channel_sw_ie
*sw_elem
=
1734 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1735 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1736 bss
, rx_status
->mactime
);
1741 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1742 struct sk_buff
*skb
)
1744 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1745 struct ieee80211_if_managed
*ifmgd
;
1746 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1747 size_t baselen
, len
= skb
->len
;
1748 struct ieee802_11_elems elems
;
1750 ifmgd
= &sdata
->u
.mgd
;
1752 ASSERT_MGD_MTX(ifmgd
);
1754 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1755 return; /* ignore ProbeResp to foreign address */
1757 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1761 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1764 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1766 if (ifmgd
->associated
&&
1767 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1768 ieee80211_reset_ap_probe(sdata
);
1772 * This is the canonical list of information elements we care about,
1773 * the filter code also gives us all changes to the Microsoft OUI
1774 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1776 * We implement beacon filtering in software since that means we can
1777 * avoid processing the frame here and in cfg80211, and userspace
1778 * will not be able to tell whether the hardware supports it or not.
1780 * XXX: This list needs to be dynamic -- userspace needs to be able to
1781 * add items it requires. It also needs to be able to tell us to
1782 * look out for other vendor IEs.
1784 static const u64 care_about_ies
=
1785 (1ULL << WLAN_EID_COUNTRY
) |
1786 (1ULL << WLAN_EID_ERP_INFO
) |
1787 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1788 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1789 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1790 (1ULL << WLAN_EID_HT_INFORMATION
);
1792 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1793 struct ieee80211_mgmt
*mgmt
,
1795 struct ieee80211_rx_status
*rx_status
)
1797 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1798 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1800 struct ieee802_11_elems elems
;
1801 struct ieee80211_local
*local
= sdata
->local
;
1803 bool erp_valid
, directed_tim
= false;
1808 ASSERT_MGD_MTX(ifmgd
);
1810 /* Process beacon from the current BSS */
1811 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1815 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1819 * We might have received a number of frames, among them a
1820 * disassoc frame and a beacon...
1822 if (!ifmgd
->associated
)
1825 bssid
= ifmgd
->associated
->bssid
;
1828 * And in theory even frames from a different AP we were just
1829 * associated to a split-second ago!
1831 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1834 /* Track average RSSI from the Beacon frames of the current AP */
1835 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1836 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1837 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1838 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1839 ifmgd
->last_cqm_event_signal
= 0;
1840 ifmgd
->count_beacon_signal
= 1;
1841 ifmgd
->last_ave_beacon_signal
= 0;
1843 ifmgd
->ave_beacon_signal
=
1844 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1845 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1846 ifmgd
->ave_beacon_signal
) / 16;
1847 ifmgd
->count_beacon_signal
++;
1850 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1851 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1852 int sig
= ifmgd
->ave_beacon_signal
;
1853 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1856 * if signal crosses either of the boundaries, invoke callback
1857 * with appropriate parameters
1859 if (sig
> ifmgd
->rssi_max_thold
&&
1860 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1861 ifmgd
->last_ave_beacon_signal
= sig
;
1862 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1863 } else if (sig
< ifmgd
->rssi_min_thold
&&
1864 (last_sig
>= ifmgd
->rssi_max_thold
||
1866 ifmgd
->last_ave_beacon_signal
= sig
;
1867 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1871 if (bss_conf
->cqm_rssi_thold
&&
1872 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1873 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1874 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1875 int last_event
= ifmgd
->last_cqm_event_signal
;
1876 int thold
= bss_conf
->cqm_rssi_thold
;
1877 int hyst
= bss_conf
->cqm_rssi_hyst
;
1879 (last_event
== 0 || sig
< last_event
- hyst
)) {
1880 ifmgd
->last_cqm_event_signal
= sig
;
1881 ieee80211_cqm_rssi_notify(
1883 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1885 } else if (sig
> thold
&&
1886 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1887 ifmgd
->last_cqm_event_signal
= sig
;
1888 ieee80211_cqm_rssi_notify(
1890 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1895 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1896 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1897 if (net_ratelimit()) {
1898 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1899 "to a received beacon\n", sdata
->name
);
1902 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1903 mutex_lock(&local
->iflist_mtx
);
1904 ieee80211_recalc_ps(local
, -1);
1905 mutex_unlock(&local
->iflist_mtx
);
1909 * Push the beacon loss detection into the future since
1910 * we are processing a beacon from the AP just now.
1912 ieee80211_sta_reset_beacon_monitor(sdata
);
1914 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1915 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1916 len
- baselen
, &elems
,
1917 care_about_ies
, ncrc
);
1919 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1920 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1923 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1924 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1927 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1928 elems
.wmm_param_len
);
1931 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1933 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1934 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1935 ieee80211_hw_config(local
,
1936 IEEE80211_CONF_CHANGE_PS
);
1937 ieee80211_send_nullfunc(local
, sdata
, 0);
1939 local
->pspolling
= true;
1942 * Here is assumed that the driver will be
1943 * able to send ps-poll frame and receive a
1944 * response even though power save mode is
1945 * enabled, but some drivers might require
1946 * to disable power save here. This needs
1947 * to be investigated.
1949 ieee80211_send_pspoll(local
, sdata
);
1954 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1956 ifmgd
->beacon_crc
= ncrc
;
1957 ifmgd
->beacon_crc_valid
= true;
1959 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1961 erp_value
= elems
.erp_info
[0];
1965 changed
|= ieee80211_handle_bss_capability(sdata
,
1966 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1967 erp_valid
, erp_value
);
1970 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1971 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1972 struct sta_info
*sta
;
1973 struct ieee80211_supported_band
*sband
;
1974 u16 ap_ht_cap_flags
;
1978 sta
= sta_info_get(sdata
, bssid
);
1979 if (WARN_ON(!sta
)) {
1984 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1986 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
1987 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1989 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1993 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1994 bssid
, ap_ht_cap_flags
, true);
1997 /* Note: country IE parsing is done for us by cfg80211 */
1998 if (elems
.country_elem
) {
1999 /* TODO: IBSS also needs this */
2000 if (elems
.pwr_constr_elem
)
2001 ieee80211_handle_pwr_constr(sdata
,
2002 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2003 elems
.pwr_constr_elem
,
2004 elems
.pwr_constr_elem_len
);
2007 ieee80211_bss_info_change_notify(sdata
, changed
);
2010 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2011 struct sk_buff
*skb
)
2013 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2014 struct ieee80211_rx_status
*rx_status
;
2015 struct ieee80211_mgmt
*mgmt
;
2016 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2019 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2020 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2021 fc
= le16_to_cpu(mgmt
->frame_control
);
2023 mutex_lock(&ifmgd
->mtx
);
2025 if (ifmgd
->associated
&&
2026 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
2027 switch (fc
& IEEE80211_FCTL_STYPE
) {
2028 case IEEE80211_STYPE_BEACON
:
2029 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
2032 case IEEE80211_STYPE_PROBE_RESP
:
2033 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2035 case IEEE80211_STYPE_DEAUTH
:
2036 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2038 case IEEE80211_STYPE_DISASSOC
:
2039 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2041 case IEEE80211_STYPE_ACTION
:
2042 switch (mgmt
->u
.action
.category
) {
2043 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2044 ieee80211_sta_process_chanswitch(sdata
,
2045 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2046 (void *)ifmgd
->associated
->priv
,
2047 rx_status
->mactime
);
2051 mutex_unlock(&ifmgd
->mtx
);
2057 case RX_MGMT_CFG80211_DEAUTH
:
2058 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2060 case RX_MGMT_CFG80211_DISASSOC
:
2061 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2064 WARN(1, "unexpected: %d", rma
);
2069 mutex_unlock(&ifmgd
->mtx
);
2071 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
2072 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
2073 struct ieee80211_local
*local
= sdata
->local
;
2074 struct ieee80211_work
*wk
;
2076 mutex_lock(&local
->mtx
);
2077 list_for_each_entry(wk
, &local
->work_list
, list
) {
2078 if (wk
->sdata
!= sdata
)
2081 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2082 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2085 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2087 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2091 * Printing the message only here means we can't
2092 * spuriously print it, but it also means that it
2093 * won't be printed when the frame comes in before
2094 * we even tried to associate or in similar cases.
2096 * Ultimately, I suspect cfg80211 should print the
2100 "%s: deauthenticated from %pM (Reason: %u)\n",
2101 sdata
->name
, mgmt
->bssid
,
2102 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2104 list_del_rcu(&wk
->list
);
2108 mutex_unlock(&local
->mtx
);
2110 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2114 static void ieee80211_sta_timer(unsigned long data
)
2116 struct ieee80211_sub_if_data
*sdata
=
2117 (struct ieee80211_sub_if_data
*) data
;
2118 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2119 struct ieee80211_local
*local
= sdata
->local
;
2121 if (local
->quiescing
) {
2122 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2126 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2129 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2130 u8
*bssid
, u8 reason
)
2132 struct ieee80211_local
*local
= sdata
->local
;
2133 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2135 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2136 IEEE80211_STA_BEACON_POLL
);
2138 ieee80211_set_disassoc(sdata
, true, true);
2139 mutex_unlock(&ifmgd
->mtx
);
2141 * must be outside lock due to cfg80211,
2142 * but that's not a problem.
2144 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2145 IEEE80211_STYPE_DEAUTH
, reason
,
2148 mutex_lock(&local
->mtx
);
2149 ieee80211_recalc_idle(local
);
2150 mutex_unlock(&local
->mtx
);
2152 mutex_lock(&ifmgd
->mtx
);
2155 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2157 struct ieee80211_local
*local
= sdata
->local
;
2158 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2160 /* then process the rest of the work */
2161 mutex_lock(&ifmgd
->mtx
);
2163 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2164 IEEE80211_STA_CONNECTION_POLL
) &&
2165 ifmgd
->associated
) {
2169 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2171 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2172 max_tries
= max_nullfunc_tries
;
2174 max_tries
= max_probe_tries
;
2176 /* ACK received for nullfunc probing frame */
2177 if (!ifmgd
->probe_send_count
)
2178 ieee80211_reset_ap_probe(sdata
);
2179 else if (ifmgd
->nullfunc_failed
) {
2180 if (ifmgd
->probe_send_count
< max_tries
) {
2181 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2182 wiphy_debug(local
->hw
.wiphy
,
2183 "%s: No ack for nullfunc frame to"
2184 " AP %pM, try %d/%i\n",
2186 ifmgd
->probe_send_count
, max_tries
);
2188 ieee80211_mgd_probe_ap_send(sdata
);
2190 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2191 wiphy_debug(local
->hw
.wiphy
,
2192 "%s: No ack for nullfunc frame to"
2193 " AP %pM, disconnecting.\n",
2194 sdata
->name
, bssid
);
2196 ieee80211_sta_connection_lost(sdata
, bssid
,
2197 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2199 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2200 run_again(ifmgd
, ifmgd
->probe_timeout
);
2201 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2202 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2203 wiphy_debug(local
->hw
.wiphy
,
2204 "%s: Failed to send nullfunc to AP %pM"
2205 " after %dms, disconnecting.\n",
2207 bssid
, probe_wait_ms
);
2209 ieee80211_sta_connection_lost(sdata
, bssid
,
2210 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2211 } else if (ifmgd
->probe_send_count
< max_tries
) {
2212 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2213 wiphy_debug(local
->hw
.wiphy
,
2214 "%s: No probe response from AP %pM"
2215 " after %dms, try %d/%i\n",
2217 bssid
, probe_wait_ms
,
2218 ifmgd
->probe_send_count
, max_tries
);
2220 ieee80211_mgd_probe_ap_send(sdata
);
2223 * We actually lost the connection ... or did we?
2226 wiphy_debug(local
->hw
.wiphy
,
2227 "%s: No probe response from AP %pM"
2228 " after %dms, disconnecting.\n",
2230 bssid
, probe_wait_ms
);
2232 ieee80211_sta_connection_lost(sdata
, bssid
,
2233 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2237 mutex_unlock(&ifmgd
->mtx
);
2240 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2242 struct ieee80211_sub_if_data
*sdata
=
2243 (struct ieee80211_sub_if_data
*) data
;
2244 struct ieee80211_local
*local
= sdata
->local
;
2246 if (local
->quiescing
)
2249 ieee80211_queue_work(&sdata
->local
->hw
,
2250 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2253 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2255 struct ieee80211_sub_if_data
*sdata
=
2256 (struct ieee80211_sub_if_data
*) data
;
2257 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2258 struct ieee80211_local
*local
= sdata
->local
;
2260 if (local
->quiescing
)
2263 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2266 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2268 struct ieee80211_sub_if_data
*sdata
=
2269 container_of(work
, struct ieee80211_sub_if_data
,
2270 u
.mgd
.monitor_work
);
2272 ieee80211_mgd_probe_ap(sdata
, false);
2275 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2277 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2278 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2279 IEEE80211_STA_CONNECTION_POLL
);
2281 /* let's probe the connection once */
2282 ieee80211_queue_work(&sdata
->local
->hw
,
2283 &sdata
->u
.mgd
.monitor_work
);
2284 /* and do all the other regular work too */
2285 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2290 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2292 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2295 * we need to use atomic bitops for the running bits
2296 * only because both timers might fire at the same
2297 * time -- the code here is properly synchronised.
2300 cancel_work_sync(&ifmgd
->request_smps_work
);
2302 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2303 if (del_timer_sync(&ifmgd
->timer
))
2304 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2306 cancel_work_sync(&ifmgd
->chswitch_work
);
2307 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2308 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2310 cancel_work_sync(&ifmgd
->monitor_work
);
2311 /* these will just be re-established on connection */
2312 del_timer_sync(&ifmgd
->conn_mon_timer
);
2313 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2316 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2318 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2320 if (!ifmgd
->associated
)
2323 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2324 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2325 mutex_lock(&ifmgd
->mtx
);
2326 if (ifmgd
->associated
) {
2327 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2328 wiphy_debug(sdata
->local
->hw
.wiphy
,
2329 "%s: driver requested disconnect after resume.\n",
2332 ieee80211_sta_connection_lost(sdata
,
2333 ifmgd
->associated
->bssid
,
2334 WLAN_REASON_UNSPECIFIED
);
2335 mutex_unlock(&ifmgd
->mtx
);
2338 mutex_unlock(&ifmgd
->mtx
);
2341 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2342 add_timer(&ifmgd
->timer
);
2343 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2344 add_timer(&ifmgd
->chswitch_timer
);
2345 ieee80211_sta_reset_beacon_monitor(sdata
);
2346 ieee80211_restart_sta_timer(sdata
);
2347 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2351 /* interface setup */
2352 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2354 struct ieee80211_if_managed
*ifmgd
;
2356 ifmgd
= &sdata
->u
.mgd
;
2357 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2358 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2359 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2360 ieee80211_beacon_connection_loss_work
);
2361 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2362 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2363 (unsigned long) sdata
);
2364 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2365 (unsigned long) sdata
);
2366 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2367 (unsigned long) sdata
);
2368 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2369 (unsigned long) sdata
);
2373 mutex_init(&ifmgd
->mtx
);
2375 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2376 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2378 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2381 /* scan finished notification */
2382 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2384 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2386 /* Restart STA timers */
2388 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2389 ieee80211_restart_sta_timer(sdata
);
2393 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2394 unsigned long data
, void *dummy
)
2396 s32 latency_usec
= (s32
) data
;
2397 struct ieee80211_local
*local
=
2398 container_of(nb
, struct ieee80211_local
,
2399 network_latency_notifier
);
2401 mutex_lock(&local
->iflist_mtx
);
2402 ieee80211_recalc_ps(local
, latency_usec
);
2403 mutex_unlock(&local
->iflist_mtx
);
2409 static enum work_done_result
2410 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2411 struct sk_buff
*skb
)
2413 struct ieee80211_local
*local
= wk
->sdata
->local
;
2416 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2420 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2421 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2425 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2426 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2427 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2429 wk
->type
= IEEE80211_WORK_AUTH
;
2430 wk
->probe_auth
.tries
= 0;
2431 return WORK_DONE_REQUEUE
;
2433 if (wk
->probe_auth
.synced
)
2434 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2435 IEEE80211_TX_SYNC_AUTH
);
2437 return WORK_DONE_DESTROY
;
2440 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2441 struct cfg80211_auth_request
*req
)
2444 struct ieee80211_work
*wk
;
2447 if (req
->local_state_change
)
2448 return 0; /* no need to update mac80211 state */
2450 switch (req
->auth_type
) {
2451 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2452 auth_alg
= WLAN_AUTH_OPEN
;
2454 case NL80211_AUTHTYPE_SHARED_KEY
:
2455 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2457 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2459 case NL80211_AUTHTYPE_FT
:
2460 auth_alg
= WLAN_AUTH_FT
;
2462 case NL80211_AUTHTYPE_NETWORK_EAP
:
2463 auth_alg
= WLAN_AUTH_LEAP
;
2469 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2473 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2475 if (req
->ie
&& req
->ie_len
) {
2476 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2477 wk
->ie_len
= req
->ie_len
;
2480 if (req
->key
&& req
->key_len
) {
2481 wk
->probe_auth
.key_len
= req
->key_len
;
2482 wk
->probe_auth
.key_idx
= req
->key_idx
;
2483 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2486 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2487 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2488 wk
->probe_auth
.ssid_len
= ssid
[1];
2490 wk
->probe_auth
.algorithm
= auth_alg
;
2491 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2493 /* if we already have a probe, don't probe again */
2494 if (req
->bss
->proberesp_ies
)
2495 wk
->type
= IEEE80211_WORK_AUTH
;
2497 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2498 wk
->chan
= req
->bss
->channel
;
2499 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2501 wk
->done
= ieee80211_probe_auth_done
;
2503 ieee80211_add_work(wk
);
2507 /* create and insert a dummy station entry */
2508 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data
*sdata
,
2510 struct sta_info
*sta
;
2513 sta
= sta_info_alloc(sdata
, bssid
, GFP_KERNEL
);
2519 err
= sta_info_insert(sta
);
2522 printk(KERN_DEBUG
"%s: failed to insert Dummy STA entry for"
2523 " the AP (error %d)\n", sdata
->name
, err
);
2530 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2531 struct sk_buff
*skb
)
2533 struct ieee80211_local
*local
= wk
->sdata
->local
;
2534 struct ieee80211_mgmt
*mgmt
;
2535 struct ieee80211_rx_status
*rx_status
;
2536 struct ieee802_11_elems elems
;
2537 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
2541 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2542 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2546 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2547 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2548 rx_status
= (void *) skb
->cb
;
2549 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2550 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2552 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2554 wk
->type
= IEEE80211_WORK_ASSOC
;
2555 /* not really done yet */
2556 return WORK_DONE_REQUEUE
;
2559 mgmt
= (void *)skb
->data
;
2560 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2562 if (status
== WLAN_STATUS_SUCCESS
) {
2563 if (wk
->assoc
.synced
)
2564 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2565 IEEE80211_TX_SYNC_ASSOC
);
2567 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2568 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2569 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2570 /* oops -- internal error -- send timeout for now */
2571 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2572 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2574 return WORK_DONE_DESTROY
;
2577 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2579 /* assoc failed - destroy the dummy station entry */
2580 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2583 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2585 if (wk
->assoc
.synced
)
2586 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2587 IEEE80211_TX_SYNC_ASSOC
);
2589 return WORK_DONE_DESTROY
;
2592 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2593 struct cfg80211_assoc_request
*req
)
2595 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2596 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2597 struct ieee80211_work
*wk
;
2601 mutex_lock(&ifmgd
->mtx
);
2602 if (ifmgd
->associated
) {
2603 if (!req
->prev_bssid
||
2604 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2607 * We are already associated and the request was not a
2608 * reassociation request from the current BSS, so
2611 mutex_unlock(&ifmgd
->mtx
);
2615 /* Trying to reassociate - clear previous association state */
2616 ieee80211_set_disassoc(sdata
, true, false);
2618 mutex_unlock(&ifmgd
->mtx
);
2620 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2625 * create a dummy station info entry in order
2626 * to start accepting incoming EAPOL packets from the station
2628 err
= ieee80211_pre_assoc(sdata
, req
->bss
->bssid
);
2634 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2635 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2637 ifmgd
->beacon_crc_valid
= false;
2639 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2640 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2641 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2642 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2643 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2646 if (req
->flags
& ASSOC_REQ_DISABLE_HT
)
2647 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2649 memcpy(&ifmgd
->ht_capa
, &req
->ht_capa
, sizeof(ifmgd
->ht_capa
));
2650 memcpy(&ifmgd
->ht_capa_mask
, &req
->ht_capa_mask
,
2651 sizeof(ifmgd
->ht_capa_mask
));
2653 if (req
->ie
&& req
->ie_len
) {
2654 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2655 wk
->ie_len
= req
->ie_len
;
2659 wk
->assoc
.bss
= req
->bss
;
2661 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2663 /* new association always uses requested smps mode */
2664 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2665 if (ifmgd
->powersave
)
2666 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2668 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2670 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2672 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2674 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2675 * We still associate in non-HT mode (11a/b/g) if any one of these
2676 * ciphers is configured as pairwise.
2677 * We can set this to true for non-11n hardware, that'll be checked
2678 * separately along with the peer capabilities.
2680 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2681 wk
->assoc
.capability
= req
->bss
->capability
;
2682 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2683 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2684 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2685 wk
->assoc
.ht_information_ie
=
2686 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2688 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2689 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2690 wk
->assoc
.uapsd_used
= true;
2691 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2693 wk
->assoc
.uapsd_used
= false;
2694 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2697 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2698 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2699 wk
->assoc
.ssid_len
= ssid
[1];
2701 if (req
->prev_bssid
)
2702 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2704 wk
->chan
= req
->bss
->channel
;
2705 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2707 wk
->done
= ieee80211_assoc_done
;
2708 if (!bss
->dtim_period
&&
2709 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2710 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2712 wk
->type
= IEEE80211_WORK_ASSOC
;
2715 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2716 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2718 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2719 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2722 if (req
->crypto
.control_port
)
2723 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2725 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2727 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2728 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2730 ieee80211_add_work(wk
);
2734 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2735 struct cfg80211_deauth_request
*req
,
2738 struct ieee80211_local
*local
= sdata
->local
;
2739 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2740 struct ieee80211_work
*wk
;
2742 bool assoc_bss
= false;
2744 mutex_lock(&ifmgd
->mtx
);
2746 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2747 if (ifmgd
->associated
== req
->bss
) {
2748 ieee80211_set_disassoc(sdata
, false, true);
2749 mutex_unlock(&ifmgd
->mtx
);
2752 bool not_auth_yet
= false;
2754 mutex_unlock(&ifmgd
->mtx
);
2756 mutex_lock(&local
->mtx
);
2757 list_for_each_entry(wk
, &local
->work_list
, list
) {
2758 if (wk
->sdata
!= sdata
)
2761 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2762 wk
->type
!= IEEE80211_WORK_AUTH
&&
2763 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2764 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2767 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2770 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2771 list_del_rcu(&wk
->list
);
2775 mutex_unlock(&local
->mtx
);
2778 * If somebody requests authentication and we haven't
2779 * sent out an auth frame yet there's no need to send
2780 * out a deauth frame either. If the state was PROBE,
2781 * then this is the case. If it's AUTH we have sent a
2782 * frame, and if it's IDLE we have completed the auth
2786 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2791 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2792 sdata
->name
, bssid
, req
->reason_code
);
2794 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2795 req
->reason_code
, cookie
,
2796 !req
->local_state_change
);
2798 sta_info_flush(sdata
->local
, sdata
);
2800 mutex_lock(&sdata
->local
->mtx
);
2801 ieee80211_recalc_idle(sdata
->local
);
2802 mutex_unlock(&sdata
->local
->mtx
);
2807 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2808 struct cfg80211_disassoc_request
*req
,
2811 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2814 mutex_lock(&ifmgd
->mtx
);
2817 * cfg80211 should catch this ... but it's racy since
2818 * we can receive a disassoc frame, process it, hand it
2819 * to cfg80211 while that's in a locked section already
2820 * trying to tell us that the user wants to disconnect.
2822 if (ifmgd
->associated
!= req
->bss
) {
2823 mutex_unlock(&ifmgd
->mtx
);
2827 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2828 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2830 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2831 ieee80211_set_disassoc(sdata
, false, true);
2833 mutex_unlock(&ifmgd
->mtx
);
2835 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2836 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2837 cookie
, !req
->local_state_change
);
2838 sta_info_flush(sdata
->local
, sdata
);
2840 mutex_lock(&sdata
->local
->mtx
);
2841 ieee80211_recalc_idle(sdata
->local
);
2842 mutex_unlock(&sdata
->local
->mtx
);
2847 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2848 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2851 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2853 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2855 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2857 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2859 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2861 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2862 return sdata
->dev
->operstate
;
2864 EXPORT_SYMBOL(ieee80211_get_operstate
);