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/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
33 static int max_nullfunc_tries
= 2;
34 module_param(max_nullfunc_tries
, int, 0644);
35 MODULE_PARM_DESC(max_nullfunc_tries
,
36 "Maximum nullfunc tx tries before disconnecting (reason 4).");
38 static int max_probe_tries
= 5;
39 module_param(max_probe_tries
, int, 0644);
40 MODULE_PARM_DESC(max_probe_tries
,
41 "Maximum probe tries before disconnecting (reason 4).");
44 * Beacon loss timeout is calculated as N frames times the
45 * advertised beacon interval. This may need to be somewhat
46 * higher than what hardware might detect to account for
47 * delays in the host processing frames. But since we also
48 * probe on beacon miss before declaring the connection lost
49 * default to what we want.
51 #define IEEE80211_BEACON_LOSS_COUNT 7
54 * Time the connection can be idle before we probe
55 * it to see if we can still talk to the AP.
57 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
59 * Time we wait for a probe response after sending
60 * a probe request because of beacon loss or for
61 * checking the connection still works.
63 static int probe_wait_ms
= 500;
64 module_param(probe_wait_ms
, int, 0644);
65 MODULE_PARM_DESC(probe_wait_ms
,
66 "Maximum time(ms) to wait for probe response"
67 " before disconnecting (reason 4).");
70 * Weight given to the latest Beacon frame when calculating average signal
71 * strength for Beacon frames received in the current BSS. This must be
74 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
77 * How many Beacon frames need to have been used in average signal strength
78 * before starting to indicate signal change events.
80 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
82 #define TMR_RUNNING_TIMER 0
83 #define TMR_RUNNING_CHANSW 1
86 * All cfg80211 functions have to be called outside a locked
87 * section so that they can acquire a lock themselves... This
88 * is much simpler than queuing up things in cfg80211, but we
89 * do need some indirection for that here.
92 /* no action required */
95 /* caller must call cfg80211_send_deauth() */
96 RX_MGMT_CFG80211_DEAUTH
,
98 /* caller must call cfg80211_send_disassoc() */
99 RX_MGMT_CFG80211_DISASSOC
,
103 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
105 lockdep_assert_held(&ifmgd
->mtx
);
109 * We can have multiple work items (and connection probing)
110 * scheduling this timer, but we need to take care to only
111 * reschedule it when it should fire _earlier_ than it was
112 * asked for before, or if it's not pending right now. This
113 * function ensures that. Note that it then is required to
114 * run this function for all timeouts after the first one
115 * has happened -- the work that runs from this timer will
118 static void run_again(struct ieee80211_if_managed
*ifmgd
,
119 unsigned long timeout
)
121 ASSERT_MGD_MTX(ifmgd
);
123 if (!timer_pending(&ifmgd
->timer
) ||
124 time_before(timeout
, ifmgd
->timer
.expires
))
125 mod_timer(&ifmgd
->timer
, timeout
);
128 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
130 if (sdata
->local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
)
133 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
134 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
137 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
139 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
141 if (unlikely(!sdata
->u
.mgd
.associated
))
144 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
147 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
148 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
150 ifmgd
->probe_send_count
= 0;
153 static int ecw2cw(int ecw
)
155 return (1 << ecw
) - 1;
159 * ieee80211_enable_ht should be called only after the operating band
160 * has been determined as ht configuration depends on the hw's
161 * HT abilities for a specific band.
163 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
164 struct ieee80211_ht_info
*hti
,
165 const u8
*bssid
, u16 ap_ht_cap_flags
,
166 bool beacon_htcap_ie
)
168 struct ieee80211_local
*local
= sdata
->local
;
169 struct ieee80211_supported_band
*sband
;
170 struct sta_info
*sta
;
174 bool enable_ht
= true;
175 enum nl80211_channel_type prev_chantype
;
176 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
178 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
180 prev_chantype
= sdata
->vif
.bss_conf
.channel_type
;
182 /* HT is not supported */
183 if (!sband
->ht_cap
.ht_supported
)
187 hti_cfreq
= ieee80211_channel_to_frequency(hti
->control_chan
,
189 /* check that channel matches the right operating channel */
190 if (local
->hw
.conf
.channel
->center_freq
!= hti_cfreq
) {
191 /* Some APs mess this up, evidently.
192 * Netgear WNDR3700 sometimes reports 4 higher than
193 * the actual channel, for instance.
196 "%s: Wrong control channel in association"
197 " response: configured center-freq: %d"
198 " hti-cfreq: %d hti->control_chan: %d"
199 " band: %d. Disabling HT.\n",
201 local
->hw
.conf
.channel
->center_freq
,
202 hti_cfreq
, hti
->control_chan
,
209 channel_type
= NL80211_CHAN_HT20
;
211 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
212 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
213 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
214 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
215 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
216 if (!(local
->hw
.conf
.channel
->flags
&
217 IEEE80211_CHAN_NO_HT40PLUS
))
218 channel_type
= NL80211_CHAN_HT40PLUS
;
220 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
221 if (!(local
->hw
.conf
.channel
->flags
&
222 IEEE80211_CHAN_NO_HT40MINUS
))
223 channel_type
= NL80211_CHAN_HT40MINUS
;
229 if (local
->tmp_channel
)
230 local
->tmp_channel_type
= channel_type
;
232 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
233 /* can only fail due to HT40+/- mismatch */
234 channel_type
= NL80211_CHAN_HT20
;
235 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, channel_type
));
238 if (beacon_htcap_ie
&& (prev_chantype
!= channel_type
)) {
240 * Whenever the AP announces the HT mode change that can be
241 * 40MHz intolerant or etc., it would be safer to stop tx
242 * queues before doing hw config to avoid buffer overflow.
244 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
245 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
247 /* flush out all packets */
250 drv_flush(local
, false);
253 /* channel_type change automatically detected */
254 ieee80211_hw_config(local
, 0);
256 if (prev_chantype
!= channel_type
) {
258 sta
= sta_info_get(sdata
, bssid
);
260 rate_control_rate_update(local
, sband
, sta
,
261 IEEE80211_RC_HT_CHANGED
,
266 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
267 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
270 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
272 /* if bss configuration changed store the new one */
273 if (sdata
->ht_opmode_valid
!= enable_ht
||
274 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
||
275 prev_chantype
!= channel_type
) {
276 changed
|= BSS_CHANGED_HT
;
277 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
278 sdata
->ht_opmode_valid
= enable_ht
;
284 /* frame sending functions */
286 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
287 const u8
*bssid
, u16 stype
, u16 reason
,
288 void *cookie
, bool send_frame
)
290 struct ieee80211_local
*local
= sdata
->local
;
291 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
293 struct ieee80211_mgmt
*mgmt
;
295 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
299 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
301 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
303 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
304 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
305 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
306 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
308 /* u.deauth.reason_code == u.disassoc.reason_code */
309 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
311 if (stype
== IEEE80211_STYPE_DEAUTH
)
313 __cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
315 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
318 __cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
320 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
321 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
322 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
325 ieee80211_tx_skb(sdata
, skb
);
330 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
331 struct ieee80211_sub_if_data
*sdata
)
333 struct ieee80211_pspoll
*pspoll
;
336 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
340 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
341 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
343 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
344 ieee80211_tx_skb(sdata
, skb
);
347 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
348 struct ieee80211_sub_if_data
*sdata
,
352 struct ieee80211_hdr_3addr
*nullfunc
;
353 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
355 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
359 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
361 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
363 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
364 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
365 IEEE80211_STA_CONNECTION_POLL
))
366 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
368 ieee80211_tx_skb(sdata
, skb
);
371 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
372 struct ieee80211_sub_if_data
*sdata
)
375 struct ieee80211_hdr
*nullfunc
;
378 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
381 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
385 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
387 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
388 memset(nullfunc
, 0, 30);
389 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
390 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
391 nullfunc
->frame_control
= fc
;
392 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
393 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
394 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
395 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
397 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
398 ieee80211_tx_skb(sdata
, skb
);
401 /* spectrum management related things */
402 static void ieee80211_chswitch_work(struct work_struct
*work
)
404 struct ieee80211_sub_if_data
*sdata
=
405 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
406 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
408 if (!ieee80211_sdata_running(sdata
))
411 mutex_lock(&ifmgd
->mtx
);
412 if (!ifmgd
->associated
)
415 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
416 if (!sdata
->local
->ops
->channel_switch
) {
417 /* call "hw_config" only if doing sw channel switch */
418 ieee80211_hw_config(sdata
->local
,
419 IEEE80211_CONF_CHANGE_CHANNEL
);
421 /* update the device channel directly */
422 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
425 /* XXX: shouldn't really modify cfg80211-owned data! */
426 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
428 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
429 IEEE80211_QUEUE_STOP_REASON_CSA
);
431 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
432 mutex_unlock(&ifmgd
->mtx
);
435 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
437 struct ieee80211_sub_if_data
*sdata
;
438 struct ieee80211_if_managed
*ifmgd
;
440 sdata
= vif_to_sdata(vif
);
441 ifmgd
= &sdata
->u
.mgd
;
443 trace_api_chswitch_done(sdata
, success
);
446 * If the channel switch was not successful, stay
447 * around on the old channel. We currently lack
448 * good handling of this situation, possibly we
449 * should just drop the association.
451 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
454 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
456 EXPORT_SYMBOL(ieee80211_chswitch_done
);
458 static void ieee80211_chswitch_timer(unsigned long data
)
460 struct ieee80211_sub_if_data
*sdata
=
461 (struct ieee80211_sub_if_data
*) data
;
462 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
464 if (sdata
->local
->quiescing
) {
465 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
469 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
472 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
473 struct ieee80211_channel_sw_ie
*sw_elem
,
474 struct ieee80211_bss
*bss
,
477 struct cfg80211_bss
*cbss
=
478 container_of((void *)bss
, struct cfg80211_bss
, priv
);
479 struct ieee80211_channel
*new_ch
;
480 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
481 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
482 cbss
->channel
->band
);
484 ASSERT_MGD_MTX(ifmgd
);
486 if (!ifmgd
->associated
)
489 if (sdata
->local
->scanning
)
492 /* Disregard subsequent beacons if we are already running a timer
495 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
498 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
499 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
502 sdata
->local
->csa_channel
= new_ch
;
504 if (sdata
->local
->ops
->channel_switch
) {
505 /* use driver's channel switch callback */
506 struct ieee80211_channel_switch ch_switch
;
507 memset(&ch_switch
, 0, sizeof(ch_switch
));
508 ch_switch
.timestamp
= timestamp
;
510 ch_switch
.block_tx
= true;
511 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
512 IEEE80211_QUEUE_STOP_REASON_CSA
);
514 ch_switch
.channel
= new_ch
;
515 ch_switch
.count
= sw_elem
->count
;
516 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
517 drv_channel_switch(sdata
->local
, &ch_switch
);
521 /* channel switch handled in software */
522 if (sw_elem
->count
<= 1) {
523 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
526 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
527 IEEE80211_QUEUE_STOP_REASON_CSA
);
528 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
529 mod_timer(&ifmgd
->chswitch_timer
,
531 msecs_to_jiffies(sw_elem
->count
*
532 cbss
->beacon_interval
));
536 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
537 u16 capab_info
, u8
*pwr_constr_elem
,
538 u8 pwr_constr_elem_len
)
540 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
542 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
545 /* Power constraint IE length should be 1 octet */
546 if (pwr_constr_elem_len
!= 1)
549 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
550 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
551 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
552 ieee80211_hw_config(sdata
->local
, 0);
556 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
558 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
559 struct ieee80211_local
*local
= sdata
->local
;
560 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
562 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
563 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
564 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
566 local
->disable_dynamic_ps
= false;
567 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
569 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
571 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
573 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
574 struct ieee80211_local
*local
= sdata
->local
;
575 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
577 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
578 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
579 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
581 local
->disable_dynamic_ps
= true;
582 conf
->dynamic_ps_timeout
= 0;
583 del_timer_sync(&local
->dynamic_ps_timer
);
584 ieee80211_queue_work(&local
->hw
,
585 &local
->dynamic_ps_enable_work
);
587 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
590 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
591 struct ieee80211_sub_if_data
*sdata
)
593 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
596 * If we are scanning right now then the parameters will
597 * take effect when scan finishes.
602 if (conf
->dynamic_ps_timeout
> 0 &&
603 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
604 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
605 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
607 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
608 ieee80211_send_nullfunc(local
, sdata
, 1);
610 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
611 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
614 conf
->flags
|= IEEE80211_CONF_PS
;
615 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
619 static void ieee80211_change_ps(struct ieee80211_local
*local
)
621 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
623 if (local
->ps_sdata
) {
624 ieee80211_enable_ps(local
, local
->ps_sdata
);
625 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
626 conf
->flags
&= ~IEEE80211_CONF_PS
;
627 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
628 del_timer_sync(&local
->dynamic_ps_timer
);
629 cancel_work_sync(&local
->dynamic_ps_enable_work
);
633 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
635 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
636 struct sta_info
*sta
= NULL
;
637 bool authorized
= false;
642 if (!mgd
->associated
)
645 if (!mgd
->associated
->beacon_ies
)
648 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
649 IEEE80211_STA_CONNECTION_POLL
))
653 sta
= sta_info_get(sdata
, mgd
->bssid
);
655 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
661 /* need to hold RTNL or interface lock */
662 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
664 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
668 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
669 local
->ps_sdata
= NULL
;
673 if (!list_empty(&local
->work_list
)) {
674 local
->ps_sdata
= NULL
;
678 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
679 if (!ieee80211_sdata_running(sdata
))
681 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
682 /* If an AP vif is found, then disable PS
683 * by setting the count to zero thereby setting
689 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
695 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
696 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
700 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
702 beaconint_us
= ieee80211_tu_to_usec(
703 found
->vif
.bss_conf
.beacon_int
);
705 timeout
= local
->dynamic_ps_forced_timeout
;
708 * Go to full PSM if the user configures a very low
709 * latency requirement.
710 * The 2000 second value is there for compatibility
711 * until the PM_QOS_NETWORK_LATENCY is configured
714 if (latency
> (1900 * USEC_PER_MSEC
) &&
715 latency
!= (2000 * USEC_PER_SEC
))
720 local
->dynamic_ps_user_timeout
= timeout
;
721 if (!local
->disable_dynamic_ps
)
722 conf
->dynamic_ps_timeout
=
723 local
->dynamic_ps_user_timeout
;
725 if (beaconint_us
> latency
) {
726 local
->ps_sdata
= NULL
;
728 struct ieee80211_bss
*bss
;
732 bss
= (void *)found
->u
.mgd
.associated
->priv
;
733 dtimper
= bss
->dtim_period
;
735 /* If the TIM IE is invalid, pretend the value is 1 */
738 else if (dtimper
> 1)
739 maxslp
= min_t(int, dtimper
,
740 latency
/ beaconint_us
);
742 local
->hw
.conf
.max_sleep_period
= maxslp
;
743 local
->hw
.conf
.ps_dtim_period
= dtimper
;
744 local
->ps_sdata
= found
;
747 local
->ps_sdata
= NULL
;
751 ieee80211_change_ps(local
);
754 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
756 struct ieee80211_local
*local
=
757 container_of(work
, struct ieee80211_local
,
758 dynamic_ps_disable_work
);
760 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
761 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
762 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
765 ieee80211_wake_queues_by_reason(&local
->hw
,
766 IEEE80211_QUEUE_STOP_REASON_PS
);
769 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
771 struct ieee80211_local
*local
=
772 container_of(work
, struct ieee80211_local
,
773 dynamic_ps_enable_work
);
774 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
775 struct ieee80211_if_managed
*ifmgd
;
779 /* can only happen when PS was just disabled anyway */
783 ifmgd
= &sdata
->u
.mgd
;
785 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
788 if (!local
->disable_dynamic_ps
&&
789 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
790 /* don't enter PS if TX frames are pending */
791 if (drv_tx_frames_pending(local
)) {
792 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
794 local
->hw
.conf
.dynamic_ps_timeout
));
799 * transmission can be stopped by others which leads to
800 * dynamic_ps_timer expiry. Postpone the ps timer if it
801 * is not the actual idle state.
803 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
804 for (q
= 0; q
< local
->hw
.queues
; q
++) {
805 if (local
->queue_stop_reasons
[q
]) {
806 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
808 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
810 local
->hw
.conf
.dynamic_ps_timeout
));
814 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
817 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
818 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
))) {
819 netif_tx_stop_all_queues(sdata
->dev
);
821 if (drv_tx_frames_pending(local
))
822 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
824 local
->hw
.conf
.dynamic_ps_timeout
));
826 ieee80211_send_nullfunc(local
, sdata
, 1);
827 /* Flush to get the tx status of nullfunc frame */
828 drv_flush(local
, false);
832 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
833 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
834 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
835 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
836 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
837 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
840 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
841 netif_tx_wake_all_queues(sdata
->dev
);
844 void ieee80211_dynamic_ps_timer(unsigned long data
)
846 struct ieee80211_local
*local
= (void *) data
;
848 if (local
->quiescing
|| local
->suspended
)
851 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
855 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
856 struct ieee80211_sub_if_data
*sdata
,
857 u8
*wmm_param
, size_t wmm_param_len
)
859 struct ieee80211_tx_queue_params params
;
860 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
863 u8
*pos
, uapsd_queues
= 0;
865 if (!local
->ops
->conf_tx
)
868 if (local
->hw
.queues
< 4)
874 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
877 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
878 uapsd_queues
= local
->uapsd_queues
;
880 count
= wmm_param
[6] & 0x0f;
881 if (count
== ifmgd
->wmm_last_param_set
)
883 ifmgd
->wmm_last_param_set
= count
;
886 left
= wmm_param_len
- 8;
888 memset(¶ms
, 0, sizeof(params
));
891 for (; left
>= 4; left
-= 4, pos
+= 4) {
892 int aci
= (pos
[0] >> 5) & 0x03;
893 int acm
= (pos
[0] >> 4) & 0x01;
901 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
902 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
908 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
909 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
915 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
916 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
923 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
924 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
929 params
.aifs
= pos
[0] & 0x0f;
930 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
931 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
932 params
.txop
= get_unaligned_le16(pos
+ 2);
933 params
.uapsd
= uapsd
;
935 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
936 wiphy_debug(local
->hw
.wiphy
,
937 "WMM queue=%d aci=%d acm=%d aifs=%d "
938 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
940 params
.aifs
, params
.cw_min
, params
.cw_max
,
941 params
.txop
, params
.uapsd
);
943 sdata
->tx_conf
[queue
] = params
;
944 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
945 wiphy_debug(local
->hw
.wiphy
,
946 "failed to set TX queue parameters for queue %d\n",
950 /* enable WMM or activate new settings */
951 sdata
->vif
.bss_conf
.qos
= true;
952 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
955 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
956 u16 capab
, bool erp_valid
, u8 erp
)
958 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
961 bool use_short_preamble
;
965 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
966 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
968 use_protection
= false;
969 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
972 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
973 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
974 use_short_slot
= true;
976 if (use_protection
!= bss_conf
->use_cts_prot
) {
977 bss_conf
->use_cts_prot
= use_protection
;
978 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
981 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
982 bss_conf
->use_short_preamble
= use_short_preamble
;
983 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
986 if (use_short_slot
!= bss_conf
->use_short_slot
) {
987 bss_conf
->use_short_slot
= use_short_slot
;
988 changed
|= BSS_CHANGED_ERP_SLOT
;
994 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
995 struct cfg80211_bss
*cbss
,
996 u32 bss_info_changed
)
998 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
999 struct ieee80211_local
*local
= sdata
->local
;
1000 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1002 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1003 /* set timing information */
1004 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1005 bss_conf
->timestamp
= cbss
->tsf
;
1007 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1008 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1009 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1011 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1012 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1014 sdata
->u
.mgd
.associated
= cbss
;
1015 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1017 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1019 /* just to be sure */
1020 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1021 IEEE80211_STA_BEACON_POLL
);
1023 ieee80211_led_assoc(local
, 1);
1025 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1026 bss_conf
->dtim_period
= bss
->dtim_period
;
1028 bss_conf
->dtim_period
= 0;
1030 bss_conf
->assoc
= 1;
1032 * For now just always ask the driver to update the basic rateset
1033 * when we have associated, we aren't checking whether it actually
1036 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1038 /* And the BSSID changed - we're associated now */
1039 bss_info_changed
|= BSS_CHANGED_BSSID
;
1041 /* Tell the driver to monitor connection quality (if supported) */
1042 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1043 bss_conf
->cqm_rssi_thold
)
1044 bss_info_changed
|= BSS_CHANGED_CQM
;
1046 /* Enable ARP filtering */
1047 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1048 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1049 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1052 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1054 mutex_lock(&local
->iflist_mtx
);
1055 ieee80211_recalc_ps(local
, -1);
1056 ieee80211_recalc_smps(local
);
1057 mutex_unlock(&local
->iflist_mtx
);
1059 netif_tx_start_all_queues(sdata
->dev
);
1060 netif_carrier_on(sdata
->dev
);
1063 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1064 bool remove_sta
, bool tx
)
1066 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1067 struct ieee80211_local
*local
= sdata
->local
;
1068 struct sta_info
*sta
;
1069 u32 changed
= 0, config_changed
= 0;
1072 ASSERT_MGD_MTX(ifmgd
);
1074 if (WARN_ON(!ifmgd
->associated
))
1077 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1079 ifmgd
->associated
= NULL
;
1080 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1083 * we need to commit the associated = NULL change because the
1084 * scan code uses that to determine whether this iface should
1085 * go to/wake up from powersave or not -- and could otherwise
1086 * wake the queues erroneously.
1091 * Thus, we can only afterwards stop the queues -- to account
1092 * for the case where another CPU is finishing a scan at this
1093 * time -- we don't want the scan code to enable queues.
1096 netif_tx_stop_all_queues(sdata
->dev
);
1097 netif_carrier_off(sdata
->dev
);
1099 mutex_lock(&local
->sta_mtx
);
1100 sta
= sta_info_get(sdata
, bssid
);
1102 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1103 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1105 mutex_unlock(&local
->sta_mtx
);
1107 changed
|= ieee80211_reset_erp_info(sdata
);
1109 ieee80211_led_assoc(local
, 0);
1110 changed
|= BSS_CHANGED_ASSOC
;
1111 sdata
->vif
.bss_conf
.assoc
= false;
1113 ieee80211_set_wmm_default(sdata
);
1115 /* channel(_type) changes are handled by ieee80211_hw_config */
1116 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1118 /* on the next assoc, re-program HT parameters */
1119 sdata
->ht_opmode_valid
= false;
1121 local
->power_constr_level
= 0;
1123 del_timer_sync(&local
->dynamic_ps_timer
);
1124 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1126 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1127 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1128 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1130 local
->ps_sdata
= NULL
;
1132 ieee80211_hw_config(local
, config_changed
);
1134 /* Disable ARP filtering */
1135 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1136 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1137 changed
|= BSS_CHANGED_ARP_FILTER
;
1140 /* The BSSID (not really interesting) and HT changed */
1141 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1142 ieee80211_bss_info_change_notify(sdata
, changed
);
1144 /* remove AP and TDLS peers */
1146 sta_info_flush(local
, sdata
);
1148 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1149 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1150 del_timer_sync(&sdata
->u
.mgd
.timer
);
1151 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1154 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1155 struct ieee80211_hdr
*hdr
)
1158 * We can postpone the mgd.timer whenever receiving unicast frames
1159 * from AP because we know that the connection is working both ways
1160 * at that time. But multicast frames (and hence also beacons) must
1161 * be ignored here, because we need to trigger the timer during
1162 * data idle periods for sending the periodic probe request to the
1163 * AP we're connected to.
1165 if (is_multicast_ether_addr(hdr
->addr1
))
1168 ieee80211_sta_reset_conn_monitor(sdata
);
1171 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1173 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1175 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1176 IEEE80211_STA_CONNECTION_POLL
)))
1179 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1180 IEEE80211_STA_BEACON_POLL
);
1181 mutex_lock(&sdata
->local
->iflist_mtx
);
1182 ieee80211_recalc_ps(sdata
->local
, -1);
1183 mutex_unlock(&sdata
->local
->iflist_mtx
);
1185 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1189 * We've received a probe response, but are not sure whether
1190 * we have or will be receiving any beacons or data, so let's
1191 * schedule the timers again, just in case.
1193 ieee80211_sta_reset_beacon_monitor(sdata
);
1195 mod_timer(&ifmgd
->conn_mon_timer
,
1196 round_jiffies_up(jiffies
+
1197 IEEE80211_CONNECTION_IDLE_TIME
));
1200 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1201 struct ieee80211_hdr
*hdr
, bool ack
)
1203 if (!ieee80211_is_data(hdr
->frame_control
))
1207 ieee80211_sta_reset_conn_monitor(sdata
);
1209 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1210 sdata
->u
.mgd
.probe_send_count
> 0) {
1212 sdata
->u
.mgd
.probe_send_count
= 0;
1214 sdata
->u
.mgd
.nullfunc_failed
= true;
1215 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1219 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1221 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1223 u8
*dst
= ifmgd
->associated
->bssid
;
1224 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1227 * Try sending broadcast probe requests for the last three
1228 * probe requests after the first ones failed since some
1229 * buggy APs only support broadcast probe requests.
1231 if (ifmgd
->probe_send_count
>= unicast_limit
)
1235 * When the hardware reports an accurate Tx ACK status, it's
1236 * better to send a nullfunc frame instead of a probe request,
1237 * as it will kick us off the AP quickly if we aren't associated
1238 * anymore. The timeout will be reset if the frame is ACKed by
1241 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1242 ifmgd
->nullfunc_failed
= false;
1243 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1245 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1246 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1247 (u32
) -1, true, false);
1250 ifmgd
->probe_send_count
++;
1251 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1252 run_again(ifmgd
, ifmgd
->probe_timeout
);
1255 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1258 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1259 bool already
= false;
1261 if (!ieee80211_sdata_running(sdata
))
1264 if (sdata
->local
->scanning
)
1267 if (sdata
->local
->tmp_channel
)
1270 mutex_lock(&ifmgd
->mtx
);
1272 if (!ifmgd
->associated
)
1275 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1276 if (beacon
&& net_ratelimit())
1277 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1278 "- sending probe request\n", sdata
->name
);
1282 * The driver/our work has already reported this event or the
1283 * connection monitoring has kicked in and we have already sent
1284 * a probe request. Or maybe the AP died and the driver keeps
1285 * reporting until we disassociate...
1287 * In either case we have to ignore the current call to this
1288 * function (except for setting the correct probe reason bit)
1289 * because otherwise we would reset the timer every time and
1290 * never check whether we received a probe response!
1292 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1293 IEEE80211_STA_CONNECTION_POLL
))
1297 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1299 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1304 mutex_lock(&sdata
->local
->iflist_mtx
);
1305 ieee80211_recalc_ps(sdata
->local
, -1);
1306 mutex_unlock(&sdata
->local
->iflist_mtx
);
1308 ifmgd
->probe_send_count
= 0;
1309 ieee80211_mgd_probe_ap_send(sdata
);
1311 mutex_unlock(&ifmgd
->mtx
);
1314 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1315 struct ieee80211_vif
*vif
)
1317 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1318 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1319 struct sk_buff
*skb
;
1322 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1325 ASSERT_MGD_MTX(ifmgd
);
1327 if (!ifmgd
->associated
)
1330 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1331 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1332 (u32
) -1, ssid
+ 2, ssid
[1],
1337 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1339 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1341 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1342 struct ieee80211_local
*local
= sdata
->local
;
1345 mutex_lock(&ifmgd
->mtx
);
1346 if (!ifmgd
->associated
) {
1347 mutex_unlock(&ifmgd
->mtx
);
1351 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1353 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1354 sdata
->name
, bssid
);
1356 ieee80211_set_disassoc(sdata
, true, true);
1357 mutex_unlock(&ifmgd
->mtx
);
1359 mutex_lock(&local
->mtx
);
1360 ieee80211_recalc_idle(local
);
1361 mutex_unlock(&local
->mtx
);
1363 * must be outside lock due to cfg80211,
1364 * but that's not a problem.
1366 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1367 IEEE80211_STYPE_DEAUTH
,
1368 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1372 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1374 struct ieee80211_sub_if_data
*sdata
=
1375 container_of(work
, struct ieee80211_sub_if_data
,
1376 u
.mgd
.beacon_connection_loss_work
);
1378 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1379 __ieee80211_connection_loss(sdata
);
1381 ieee80211_mgd_probe_ap(sdata
, true);
1384 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1386 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1387 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1389 trace_api_beacon_loss(sdata
);
1391 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1392 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1394 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1396 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1398 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1399 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1401 trace_api_connection_loss(sdata
);
1403 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1404 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1406 EXPORT_SYMBOL(ieee80211_connection_loss
);
1409 static enum rx_mgmt_action __must_check
1410 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1411 struct ieee80211_mgmt
*mgmt
, size_t len
)
1413 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1414 const u8
*bssid
= NULL
;
1418 return RX_MGMT_NONE
;
1420 ASSERT_MGD_MTX(ifmgd
);
1422 bssid
= ifmgd
->associated
->bssid
;
1424 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1426 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1427 sdata
->name
, bssid
, reason_code
);
1429 ieee80211_set_disassoc(sdata
, true, false);
1430 mutex_lock(&sdata
->local
->mtx
);
1431 ieee80211_recalc_idle(sdata
->local
);
1432 mutex_unlock(&sdata
->local
->mtx
);
1434 return RX_MGMT_CFG80211_DEAUTH
;
1438 static enum rx_mgmt_action __must_check
1439 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1440 struct ieee80211_mgmt
*mgmt
, size_t len
)
1442 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1446 return RX_MGMT_NONE
;
1448 ASSERT_MGD_MTX(ifmgd
);
1450 if (WARN_ON(!ifmgd
->associated
))
1451 return RX_MGMT_NONE
;
1453 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1454 return RX_MGMT_NONE
;
1456 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1458 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1459 sdata
->name
, mgmt
->sa
, reason_code
);
1461 ieee80211_set_disassoc(sdata
, true, false);
1462 mutex_lock(&sdata
->local
->mtx
);
1463 ieee80211_recalc_idle(sdata
->local
);
1464 mutex_unlock(&sdata
->local
->mtx
);
1465 return RX_MGMT_CFG80211_DISASSOC
;
1469 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1470 struct ieee80211_mgmt
*mgmt
, size_t len
)
1472 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1473 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1474 struct ieee80211_local
*local
= sdata
->local
;
1475 struct ieee80211_supported_band
*sband
;
1476 struct sta_info
*sta
;
1477 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1479 u32 rates
, basic_rates
;
1480 u16 capab_info
, aid
;
1481 struct ieee802_11_elems elems
;
1482 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1485 bool have_higher_than_11mbit
= false;
1486 u16 ap_ht_cap_flags
;
1488 /* AssocResp and ReassocResp have identical structure */
1490 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1491 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1493 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1494 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1495 "set\n", sdata
->name
, aid
);
1496 aid
&= ~(BIT(15) | BIT(14));
1498 pos
= mgmt
->u
.assoc_resp
.variable
;
1499 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1501 if (!elems
.supp_rates
) {
1502 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1509 mutex_lock(&sdata
->local
->sta_mtx
);
1511 * station info was already allocated and inserted before
1512 * the association and should be available to us
1514 sta
= sta_info_get_rx(sdata
, cbss
->bssid
);
1515 if (WARN_ON(!sta
)) {
1516 mutex_unlock(&sdata
->local
->sta_mtx
);
1520 set_sta_flag(sta
, WLAN_STA_AUTH
);
1521 set_sta_flag(sta
, WLAN_STA_ASSOC
);
1522 set_sta_flag(sta
, WLAN_STA_ASSOC_AP
);
1523 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1524 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1528 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1530 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1531 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1532 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1535 have_higher_than_11mbit
= true;
1537 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1538 if (sband
->bitrates
[j
].bitrate
== rate
) {
1541 basic_rates
|= BIT(j
);
1547 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1548 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1549 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1552 have_higher_than_11mbit
= true;
1554 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1555 if (sband
->bitrates
[j
].bitrate
== rate
) {
1558 basic_rates
|= BIT(j
);
1564 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1565 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1567 /* cf. IEEE 802.11 9.2.12 */
1568 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1569 have_higher_than_11mbit
)
1570 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1572 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1574 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1575 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1576 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1578 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1580 rate_control_rate_init(sta
);
1582 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1583 set_sta_flag(sta
, WLAN_STA_MFP
);
1585 if (elems
.wmm_param
)
1586 set_sta_flag(sta
, WLAN_STA_WME
);
1588 /* sta_info_reinsert will also unlock the mutex lock */
1589 err
= sta_info_reinsert(sta
);
1592 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1593 " the AP (error %d)\n", sdata
->name
, err
);
1598 * Always handle WMM once after association regardless
1599 * of the first value the AP uses. Setting -1 here has
1600 * that effect because the AP values is an unsigned
1603 ifmgd
->wmm_last_param_set
= -1;
1605 if (elems
.wmm_param
)
1606 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1607 elems
.wmm_param_len
);
1609 ieee80211_set_wmm_default(sdata
);
1611 local
->oper_channel
= wk
->chan
;
1613 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1614 (sdata
->local
->hw
.queues
>= 4) &&
1615 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1616 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1617 cbss
->bssid
, ap_ht_cap_flags
,
1620 /* set AID and assoc capability,
1621 * ieee80211_set_associated() will tell the driver */
1622 bss_conf
->aid
= aid
;
1623 bss_conf
->assoc_capability
= capab_info
;
1624 ieee80211_set_associated(sdata
, cbss
, changed
);
1627 * If we're using 4-addr mode, let the AP know that we're
1628 * doing so, so that it can create the STA VLAN on its side
1630 if (ifmgd
->use_4addr
)
1631 ieee80211_send_4addr_nullfunc(local
, sdata
);
1634 * Start timer to probe the connection to the AP now.
1635 * Also start the timer that will detect beacon loss.
1637 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1638 ieee80211_sta_reset_beacon_monitor(sdata
);
1644 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1645 struct ieee80211_mgmt
*mgmt
,
1647 struct ieee80211_rx_status
*rx_status
,
1648 struct ieee802_11_elems
*elems
,
1651 struct ieee80211_local
*local
= sdata
->local
;
1653 struct ieee80211_bss
*bss
;
1654 struct ieee80211_channel
*channel
;
1655 bool need_ps
= false;
1657 if (sdata
->u
.mgd
.associated
) {
1658 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1659 /* not previously set so we may need to recalc */
1660 need_ps
= !bss
->dtim_period
;
1663 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1664 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1667 freq
= rx_status
->freq
;
1669 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1671 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1674 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1677 ieee80211_rx_bss_put(local
, bss
);
1679 if (!sdata
->u
.mgd
.associated
)
1683 mutex_lock(&local
->iflist_mtx
);
1684 ieee80211_recalc_ps(local
, -1);
1685 mutex_unlock(&local
->iflist_mtx
);
1688 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1689 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1691 struct ieee80211_channel_sw_ie
*sw_elem
=
1692 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1693 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1694 bss
, rx_status
->mactime
);
1699 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1700 struct sk_buff
*skb
)
1702 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1703 struct ieee80211_if_managed
*ifmgd
;
1704 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1705 size_t baselen
, len
= skb
->len
;
1706 struct ieee802_11_elems elems
;
1708 ifmgd
= &sdata
->u
.mgd
;
1710 ASSERT_MGD_MTX(ifmgd
);
1712 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1713 return; /* ignore ProbeResp to foreign address */
1715 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1719 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1722 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1724 if (ifmgd
->associated
&&
1725 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1726 ieee80211_reset_ap_probe(sdata
);
1730 * This is the canonical list of information elements we care about,
1731 * the filter code also gives us all changes to the Microsoft OUI
1732 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1734 * We implement beacon filtering in software since that means we can
1735 * avoid processing the frame here and in cfg80211, and userspace
1736 * will not be able to tell whether the hardware supports it or not.
1738 * XXX: This list needs to be dynamic -- userspace needs to be able to
1739 * add items it requires. It also needs to be able to tell us to
1740 * look out for other vendor IEs.
1742 static const u64 care_about_ies
=
1743 (1ULL << WLAN_EID_COUNTRY
) |
1744 (1ULL << WLAN_EID_ERP_INFO
) |
1745 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1746 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1747 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1748 (1ULL << WLAN_EID_HT_INFORMATION
);
1750 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1751 struct ieee80211_mgmt
*mgmt
,
1753 struct ieee80211_rx_status
*rx_status
)
1755 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1756 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1758 struct ieee802_11_elems elems
;
1759 struct ieee80211_local
*local
= sdata
->local
;
1761 bool erp_valid
, directed_tim
= false;
1766 ASSERT_MGD_MTX(ifmgd
);
1768 /* Process beacon from the current BSS */
1769 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1773 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1777 * We might have received a number of frames, among them a
1778 * disassoc frame and a beacon...
1780 if (!ifmgd
->associated
)
1783 bssid
= ifmgd
->associated
->bssid
;
1786 * And in theory even frames from a different AP we were just
1787 * associated to a split-second ago!
1789 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1792 /* Track average RSSI from the Beacon frames of the current AP */
1793 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1794 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1795 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1796 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1797 ifmgd
->last_cqm_event_signal
= 0;
1798 ifmgd
->count_beacon_signal
= 1;
1799 ifmgd
->last_ave_beacon_signal
= 0;
1801 ifmgd
->ave_beacon_signal
=
1802 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1803 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1804 ifmgd
->ave_beacon_signal
) / 16;
1805 ifmgd
->count_beacon_signal
++;
1808 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1809 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1810 int sig
= ifmgd
->ave_beacon_signal
;
1811 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1814 * if signal crosses either of the boundaries, invoke callback
1815 * with appropriate parameters
1817 if (sig
> ifmgd
->rssi_max_thold
&&
1818 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1819 ifmgd
->last_ave_beacon_signal
= sig
;
1820 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1821 } else if (sig
< ifmgd
->rssi_min_thold
&&
1822 (last_sig
>= ifmgd
->rssi_max_thold
||
1824 ifmgd
->last_ave_beacon_signal
= sig
;
1825 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1829 if (bss_conf
->cqm_rssi_thold
&&
1830 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1831 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1832 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1833 int last_event
= ifmgd
->last_cqm_event_signal
;
1834 int thold
= bss_conf
->cqm_rssi_thold
;
1835 int hyst
= bss_conf
->cqm_rssi_hyst
;
1837 (last_event
== 0 || sig
< last_event
- hyst
)) {
1838 ifmgd
->last_cqm_event_signal
= sig
;
1839 ieee80211_cqm_rssi_notify(
1841 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1843 } else if (sig
> thold
&&
1844 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1845 ifmgd
->last_cqm_event_signal
= sig
;
1846 ieee80211_cqm_rssi_notify(
1848 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1853 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1854 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1855 if (net_ratelimit()) {
1856 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1857 "to a received beacon\n", sdata
->name
);
1860 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1861 mutex_lock(&local
->iflist_mtx
);
1862 ieee80211_recalc_ps(local
, -1);
1863 mutex_unlock(&local
->iflist_mtx
);
1867 * Push the beacon loss detection into the future since
1868 * we are processing a beacon from the AP just now.
1870 ieee80211_sta_reset_beacon_monitor(sdata
);
1872 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1873 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1874 len
- baselen
, &elems
,
1875 care_about_ies
, ncrc
);
1877 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1878 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1881 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1882 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1885 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1886 elems
.wmm_param_len
);
1889 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1891 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1892 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1893 ieee80211_hw_config(local
,
1894 IEEE80211_CONF_CHANGE_PS
);
1895 ieee80211_send_nullfunc(local
, sdata
, 0);
1897 local
->pspolling
= true;
1900 * Here is assumed that the driver will be
1901 * able to send ps-poll frame and receive a
1902 * response even though power save mode is
1903 * enabled, but some drivers might require
1904 * to disable power save here. This needs
1905 * to be investigated.
1907 ieee80211_send_pspoll(local
, sdata
);
1912 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1914 ifmgd
->beacon_crc
= ncrc
;
1915 ifmgd
->beacon_crc_valid
= true;
1917 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1919 erp_value
= elems
.erp_info
[0];
1923 changed
|= ieee80211_handle_bss_capability(sdata
,
1924 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1925 erp_valid
, erp_value
);
1928 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1929 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1930 struct sta_info
*sta
;
1931 struct ieee80211_supported_band
*sband
;
1932 u16 ap_ht_cap_flags
;
1936 sta
= sta_info_get(sdata
, bssid
);
1937 if (WARN_ON(!sta
)) {
1942 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1944 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1945 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1947 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1951 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1952 bssid
, ap_ht_cap_flags
, true);
1955 /* Note: country IE parsing is done for us by cfg80211 */
1956 if (elems
.country_elem
) {
1957 /* TODO: IBSS also needs this */
1958 if (elems
.pwr_constr_elem
)
1959 ieee80211_handle_pwr_constr(sdata
,
1960 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1961 elems
.pwr_constr_elem
,
1962 elems
.pwr_constr_elem_len
);
1965 ieee80211_bss_info_change_notify(sdata
, changed
);
1968 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1969 struct sk_buff
*skb
)
1971 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1972 struct ieee80211_rx_status
*rx_status
;
1973 struct ieee80211_mgmt
*mgmt
;
1974 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1977 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1978 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1979 fc
= le16_to_cpu(mgmt
->frame_control
);
1981 mutex_lock(&ifmgd
->mtx
);
1983 if (ifmgd
->associated
&&
1984 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
1985 switch (fc
& IEEE80211_FCTL_STYPE
) {
1986 case IEEE80211_STYPE_BEACON
:
1987 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1990 case IEEE80211_STYPE_PROBE_RESP
:
1991 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
1993 case IEEE80211_STYPE_DEAUTH
:
1994 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1996 case IEEE80211_STYPE_DISASSOC
:
1997 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1999 case IEEE80211_STYPE_ACTION
:
2000 switch (mgmt
->u
.action
.category
) {
2001 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2002 ieee80211_sta_process_chanswitch(sdata
,
2003 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2004 (void *)ifmgd
->associated
->priv
,
2005 rx_status
->mactime
);
2009 mutex_unlock(&ifmgd
->mtx
);
2015 case RX_MGMT_CFG80211_DEAUTH
:
2016 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2018 case RX_MGMT_CFG80211_DISASSOC
:
2019 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2022 WARN(1, "unexpected: %d", rma
);
2027 mutex_unlock(&ifmgd
->mtx
);
2029 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
2030 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
2031 struct ieee80211_local
*local
= sdata
->local
;
2032 struct ieee80211_work
*wk
;
2034 mutex_lock(&local
->mtx
);
2035 list_for_each_entry(wk
, &local
->work_list
, list
) {
2036 if (wk
->sdata
!= sdata
)
2039 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2040 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2043 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2045 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2049 * Printing the message only here means we can't
2050 * spuriously print it, but it also means that it
2051 * won't be printed when the frame comes in before
2052 * we even tried to associate or in similar cases.
2054 * Ultimately, I suspect cfg80211 should print the
2058 "%s: deauthenticated from %pM (Reason: %u)\n",
2059 sdata
->name
, mgmt
->bssid
,
2060 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2062 list_del_rcu(&wk
->list
);
2066 mutex_unlock(&local
->mtx
);
2068 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2072 static void ieee80211_sta_timer(unsigned long data
)
2074 struct ieee80211_sub_if_data
*sdata
=
2075 (struct ieee80211_sub_if_data
*) data
;
2076 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2077 struct ieee80211_local
*local
= sdata
->local
;
2079 if (local
->quiescing
) {
2080 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2084 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2087 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2088 u8
*bssid
, u8 reason
)
2090 struct ieee80211_local
*local
= sdata
->local
;
2091 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2093 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2094 IEEE80211_STA_BEACON_POLL
);
2096 ieee80211_set_disassoc(sdata
, true, true);
2097 mutex_unlock(&ifmgd
->mtx
);
2098 mutex_lock(&local
->mtx
);
2099 ieee80211_recalc_idle(local
);
2100 mutex_unlock(&local
->mtx
);
2102 * must be outside lock due to cfg80211,
2103 * but that's not a problem.
2105 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2106 IEEE80211_STYPE_DEAUTH
, reason
,
2108 mutex_lock(&ifmgd
->mtx
);
2111 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2113 struct ieee80211_local
*local
= sdata
->local
;
2114 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2116 /* then process the rest of the work */
2117 mutex_lock(&ifmgd
->mtx
);
2119 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2120 IEEE80211_STA_CONNECTION_POLL
) &&
2121 ifmgd
->associated
) {
2125 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2127 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2128 max_tries
= max_nullfunc_tries
;
2130 max_tries
= max_probe_tries
;
2132 /* ACK received for nullfunc probing frame */
2133 if (!ifmgd
->probe_send_count
)
2134 ieee80211_reset_ap_probe(sdata
);
2135 else if (ifmgd
->nullfunc_failed
) {
2136 if (ifmgd
->probe_send_count
< max_tries
) {
2137 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2138 wiphy_debug(local
->hw
.wiphy
,
2139 "%s: No ack for nullfunc frame to"
2140 " AP %pM, try %d/%i\n",
2142 ifmgd
->probe_send_count
, max_tries
);
2144 ieee80211_mgd_probe_ap_send(sdata
);
2146 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2147 wiphy_debug(local
->hw
.wiphy
,
2148 "%s: No ack for nullfunc frame to"
2149 " AP %pM, disconnecting.\n",
2150 sdata
->name
, bssid
);
2152 ieee80211_sta_connection_lost(sdata
, bssid
,
2153 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2155 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2156 run_again(ifmgd
, ifmgd
->probe_timeout
);
2157 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2158 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2159 wiphy_debug(local
->hw
.wiphy
,
2160 "%s: Failed to send nullfunc to AP %pM"
2161 " after %dms, disconnecting.\n",
2163 bssid
, probe_wait_ms
);
2165 ieee80211_sta_connection_lost(sdata
, bssid
,
2166 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2167 } else if (ifmgd
->probe_send_count
< max_tries
) {
2168 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2169 wiphy_debug(local
->hw
.wiphy
,
2170 "%s: No probe response from AP %pM"
2171 " after %dms, try %d/%i\n",
2173 bssid
, probe_wait_ms
,
2174 ifmgd
->probe_send_count
, max_tries
);
2176 ieee80211_mgd_probe_ap_send(sdata
);
2179 * We actually lost the connection ... or did we?
2182 wiphy_debug(local
->hw
.wiphy
,
2183 "%s: No probe response from AP %pM"
2184 " after %dms, disconnecting.\n",
2186 bssid
, probe_wait_ms
);
2188 ieee80211_sta_connection_lost(sdata
, bssid
,
2189 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2193 mutex_unlock(&ifmgd
->mtx
);
2196 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2198 struct ieee80211_sub_if_data
*sdata
=
2199 (struct ieee80211_sub_if_data
*) data
;
2200 struct ieee80211_local
*local
= sdata
->local
;
2202 if (local
->quiescing
)
2205 ieee80211_queue_work(&sdata
->local
->hw
,
2206 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2209 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2211 struct ieee80211_sub_if_data
*sdata
=
2212 (struct ieee80211_sub_if_data
*) data
;
2213 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2214 struct ieee80211_local
*local
= sdata
->local
;
2216 if (local
->quiescing
)
2219 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2222 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2224 struct ieee80211_sub_if_data
*sdata
=
2225 container_of(work
, struct ieee80211_sub_if_data
,
2226 u
.mgd
.monitor_work
);
2228 ieee80211_mgd_probe_ap(sdata
, false);
2231 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2233 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2234 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2235 IEEE80211_STA_CONNECTION_POLL
);
2237 /* let's probe the connection once */
2238 ieee80211_queue_work(&sdata
->local
->hw
,
2239 &sdata
->u
.mgd
.monitor_work
);
2240 /* and do all the other regular work too */
2241 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2246 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2248 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2251 * we need to use atomic bitops for the running bits
2252 * only because both timers might fire at the same
2253 * time -- the code here is properly synchronised.
2256 cancel_work_sync(&ifmgd
->request_smps_work
);
2258 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2259 if (del_timer_sync(&ifmgd
->timer
))
2260 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2262 cancel_work_sync(&ifmgd
->chswitch_work
);
2263 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2264 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2266 cancel_work_sync(&ifmgd
->monitor_work
);
2267 /* these will just be re-established on connection */
2268 del_timer_sync(&ifmgd
->conn_mon_timer
);
2269 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2272 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2274 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2276 if (!ifmgd
->associated
)
2279 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2280 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2281 mutex_lock(&ifmgd
->mtx
);
2282 if (ifmgd
->associated
) {
2283 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2284 wiphy_debug(sdata
->local
->hw
.wiphy
,
2285 "%s: driver requested disconnect after resume.\n",
2288 ieee80211_sta_connection_lost(sdata
,
2289 ifmgd
->associated
->bssid
,
2290 WLAN_REASON_UNSPECIFIED
);
2291 mutex_unlock(&ifmgd
->mtx
);
2294 mutex_unlock(&ifmgd
->mtx
);
2297 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2298 add_timer(&ifmgd
->timer
);
2299 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2300 add_timer(&ifmgd
->chswitch_timer
);
2301 ieee80211_sta_reset_beacon_monitor(sdata
);
2302 ieee80211_restart_sta_timer(sdata
);
2303 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2307 /* interface setup */
2308 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2310 struct ieee80211_if_managed
*ifmgd
;
2312 ifmgd
= &sdata
->u
.mgd
;
2313 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2314 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2315 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2316 ieee80211_beacon_connection_loss_work
);
2317 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2318 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2319 (unsigned long) sdata
);
2320 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2321 (unsigned long) sdata
);
2322 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2323 (unsigned long) sdata
);
2324 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2325 (unsigned long) sdata
);
2329 mutex_init(&ifmgd
->mtx
);
2331 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2332 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2334 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2337 /* scan finished notification */
2338 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2340 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2342 /* Restart STA timers */
2344 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2345 ieee80211_restart_sta_timer(sdata
);
2349 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2350 unsigned long data
, void *dummy
)
2352 s32 latency_usec
= (s32
) data
;
2353 struct ieee80211_local
*local
=
2354 container_of(nb
, struct ieee80211_local
,
2355 network_latency_notifier
);
2357 mutex_lock(&local
->iflist_mtx
);
2358 ieee80211_recalc_ps(local
, latency_usec
);
2359 mutex_unlock(&local
->iflist_mtx
);
2365 static enum work_done_result
2366 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2367 struct sk_buff
*skb
)
2369 struct ieee80211_local
*local
= wk
->sdata
->local
;
2372 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2376 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2377 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2381 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2382 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2383 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2385 wk
->type
= IEEE80211_WORK_AUTH
;
2386 wk
->probe_auth
.tries
= 0;
2387 return WORK_DONE_REQUEUE
;
2389 if (wk
->probe_auth
.synced
)
2390 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2391 IEEE80211_TX_SYNC_AUTH
);
2393 return WORK_DONE_DESTROY
;
2396 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2397 struct cfg80211_auth_request
*req
)
2400 struct ieee80211_work
*wk
;
2403 if (req
->local_state_change
)
2404 return 0; /* no need to update mac80211 state */
2406 switch (req
->auth_type
) {
2407 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2408 auth_alg
= WLAN_AUTH_OPEN
;
2410 case NL80211_AUTHTYPE_SHARED_KEY
:
2411 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2413 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2415 case NL80211_AUTHTYPE_FT
:
2416 auth_alg
= WLAN_AUTH_FT
;
2418 case NL80211_AUTHTYPE_NETWORK_EAP
:
2419 auth_alg
= WLAN_AUTH_LEAP
;
2425 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2429 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2431 if (req
->ie
&& req
->ie_len
) {
2432 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2433 wk
->ie_len
= req
->ie_len
;
2436 if (req
->key
&& req
->key_len
) {
2437 wk
->probe_auth
.key_len
= req
->key_len
;
2438 wk
->probe_auth
.key_idx
= req
->key_idx
;
2439 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2442 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2443 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2444 wk
->probe_auth
.ssid_len
= ssid
[1];
2446 wk
->probe_auth
.algorithm
= auth_alg
;
2447 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2449 /* if we already have a probe, don't probe again */
2450 if (req
->bss
->proberesp_ies
)
2451 wk
->type
= IEEE80211_WORK_AUTH
;
2453 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2454 wk
->chan
= req
->bss
->channel
;
2455 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2457 wk
->done
= ieee80211_probe_auth_done
;
2459 ieee80211_add_work(wk
);
2463 /* create and insert a dummy station entry */
2464 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data
*sdata
,
2466 struct sta_info
*sta
;
2469 sta
= sta_info_alloc(sdata
, bssid
, GFP_KERNEL
);
2475 err
= sta_info_insert(sta
);
2478 printk(KERN_DEBUG
"%s: failed to insert Dummy STA entry for"
2479 " the AP (error %d)\n", sdata
->name
, err
);
2486 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2487 struct sk_buff
*skb
)
2489 struct ieee80211_local
*local
= wk
->sdata
->local
;
2490 struct ieee80211_mgmt
*mgmt
;
2491 struct ieee80211_rx_status
*rx_status
;
2492 struct ieee802_11_elems elems
;
2493 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
2497 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2498 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2502 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2503 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2504 rx_status
= (void *) skb
->cb
;
2505 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2506 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2508 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2510 wk
->type
= IEEE80211_WORK_ASSOC
;
2511 /* not really done yet */
2512 return WORK_DONE_REQUEUE
;
2515 mgmt
= (void *)skb
->data
;
2516 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2518 if (status
== WLAN_STATUS_SUCCESS
) {
2519 if (wk
->assoc
.synced
)
2520 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2521 IEEE80211_TX_SYNC_ASSOC
);
2523 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2524 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2525 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2526 /* oops -- internal error -- send timeout for now */
2527 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2528 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2530 return WORK_DONE_DESTROY
;
2533 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2535 /* assoc failed - destroy the dummy station entry */
2536 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2539 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2541 if (wk
->assoc
.synced
)
2542 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2543 IEEE80211_TX_SYNC_ASSOC
);
2545 return WORK_DONE_DESTROY
;
2548 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2549 struct cfg80211_assoc_request
*req
)
2551 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2552 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2553 struct ieee80211_work
*wk
;
2557 mutex_lock(&ifmgd
->mtx
);
2558 if (ifmgd
->associated
) {
2559 if (!req
->prev_bssid
||
2560 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2563 * We are already associated and the request was not a
2564 * reassociation request from the current BSS, so
2567 mutex_unlock(&ifmgd
->mtx
);
2571 /* Trying to reassociate - clear previous association state */
2572 ieee80211_set_disassoc(sdata
, true, false);
2574 mutex_unlock(&ifmgd
->mtx
);
2576 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2581 * create a dummy station info entry in order
2582 * to start accepting incoming EAPOL packets from the station
2584 err
= ieee80211_pre_assoc(sdata
, req
->bss
->bssid
);
2590 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2591 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2593 ifmgd
->beacon_crc_valid
= false;
2595 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2596 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2597 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2598 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2599 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2602 if (req
->ie
&& req
->ie_len
) {
2603 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2604 wk
->ie_len
= req
->ie_len
;
2608 wk
->assoc
.bss
= req
->bss
;
2610 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2612 /* new association always uses requested smps mode */
2613 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2614 if (ifmgd
->powersave
)
2615 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2617 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2619 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2621 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2623 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2624 * We still associate in non-HT mode (11a/b/g) if any one of these
2625 * ciphers is configured as pairwise.
2626 * We can set this to true for non-11n hardware, that'll be checked
2627 * separately along with the peer capabilities.
2629 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2630 wk
->assoc
.capability
= req
->bss
->capability
;
2631 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2632 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2633 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2634 wk
->assoc
.ht_information_ie
=
2635 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2637 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2638 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2639 wk
->assoc
.uapsd_used
= true;
2640 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2642 wk
->assoc
.uapsd_used
= false;
2643 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2646 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2647 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2648 wk
->assoc
.ssid_len
= ssid
[1];
2650 if (req
->prev_bssid
)
2651 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2653 wk
->chan
= req
->bss
->channel
;
2654 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2656 wk
->done
= ieee80211_assoc_done
;
2657 if (!bss
->dtim_period
&&
2658 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2659 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2661 wk
->type
= IEEE80211_WORK_ASSOC
;
2664 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2665 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2667 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2668 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2671 if (req
->crypto
.control_port
)
2672 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2674 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2676 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2677 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2679 ieee80211_add_work(wk
);
2683 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2684 struct cfg80211_deauth_request
*req
,
2687 struct ieee80211_local
*local
= sdata
->local
;
2688 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2689 struct ieee80211_work
*wk
;
2691 bool assoc_bss
= false;
2693 mutex_lock(&ifmgd
->mtx
);
2695 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2696 if (ifmgd
->associated
== req
->bss
) {
2697 ieee80211_set_disassoc(sdata
, false, true);
2698 mutex_unlock(&ifmgd
->mtx
);
2701 bool not_auth_yet
= false;
2703 mutex_unlock(&ifmgd
->mtx
);
2705 mutex_lock(&local
->mtx
);
2706 list_for_each_entry(wk
, &local
->work_list
, list
) {
2707 if (wk
->sdata
!= sdata
)
2710 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2711 wk
->type
!= IEEE80211_WORK_AUTH
&&
2712 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2713 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2716 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2719 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2720 list_del_rcu(&wk
->list
);
2724 mutex_unlock(&local
->mtx
);
2727 * If somebody requests authentication and we haven't
2728 * sent out an auth frame yet there's no need to send
2729 * out a deauth frame either. If the state was PROBE,
2730 * then this is the case. If it's AUTH we have sent a
2731 * frame, and if it's IDLE we have completed the auth
2735 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2740 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2741 sdata
->name
, bssid
, req
->reason_code
);
2743 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2744 req
->reason_code
, cookie
,
2745 !req
->local_state_change
);
2747 sta_info_flush(sdata
->local
, sdata
);
2749 mutex_lock(&sdata
->local
->mtx
);
2750 ieee80211_recalc_idle(sdata
->local
);
2751 mutex_unlock(&sdata
->local
->mtx
);
2756 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2757 struct cfg80211_disassoc_request
*req
,
2760 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2763 mutex_lock(&ifmgd
->mtx
);
2766 * cfg80211 should catch this ... but it's racy since
2767 * we can receive a disassoc frame, process it, hand it
2768 * to cfg80211 while that's in a locked section already
2769 * trying to tell us that the user wants to disconnect.
2771 if (ifmgd
->associated
!= req
->bss
) {
2772 mutex_unlock(&ifmgd
->mtx
);
2776 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2777 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2779 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2780 ieee80211_set_disassoc(sdata
, false, true);
2782 mutex_unlock(&ifmgd
->mtx
);
2784 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2785 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2786 cookie
, !req
->local_state_change
);
2787 sta_info_flush(sdata
->local
, sdata
);
2789 mutex_lock(&sdata
->local
->mtx
);
2790 ieee80211_recalc_idle(sdata
->local
);
2791 mutex_unlock(&sdata
->local
->mtx
);
2796 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2797 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2800 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2802 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2804 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2806 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2808 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2810 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2811 return sdata
->dev
->operstate
;
2813 EXPORT_SYMBOL(ieee80211_get_operstate
);