2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 static int max_nullfunc_tries
= 2;
32 module_param(max_nullfunc_tries
, int, 0644);
33 MODULE_PARM_DESC(max_nullfunc_tries
,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
36 static int max_probe_tries
= 5;
37 module_param(max_probe_tries
, int, 0644);
38 MODULE_PARM_DESC(max_probe_tries
,
39 "Maximum probe tries before disconnecting (reason 4).");
42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
49 #define IEEE80211_BEACON_LOSS_COUNT 7
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
55 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
61 static int probe_wait_ms
= 500;
62 module_param(probe_wait_ms
, int, 0644);
63 MODULE_PARM_DESC(probe_wait_ms
,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
72 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
78 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
80 #define TMR_RUNNING_TIMER 0
81 #define TMR_RUNNING_CHANSW 1
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
90 /* no action required */
93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH
,
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC
,
101 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
103 lockdep_assert_held(&ifmgd
->mtx
);
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
116 static void run_again(struct ieee80211_if_managed
*ifmgd
,
117 unsigned long timeout
)
119 ASSERT_MGD_MTX(ifmgd
);
121 if (!timer_pending(&ifmgd
->timer
) ||
122 time_before(timeout
, ifmgd
->timer
.expires
))
123 mod_timer(&ifmgd
->timer
, timeout
);
126 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
128 if (sdata
->local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
)
131 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
132 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
135 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
137 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
139 if (unlikely(!sdata
->u
.mgd
.associated
))
142 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
145 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
146 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
148 ifmgd
->probe_send_count
= 0;
151 static int ecw2cw(int ecw
)
153 return (1 << ecw
) - 1;
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
161 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
162 struct ieee80211_ht_info
*hti
,
163 const u8
*bssid
, u16 ap_ht_cap_flags
,
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 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
211 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
212 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
213 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
214 if (!(local
->hw
.conf
.channel
->flags
&
215 IEEE80211_CHAN_NO_HT40PLUS
))
216 channel_type
= NL80211_CHAN_HT40PLUS
;
218 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
219 if (!(local
->hw
.conf
.channel
->flags
&
220 IEEE80211_CHAN_NO_HT40MINUS
))
221 channel_type
= NL80211_CHAN_HT40MINUS
;
227 if (local
->tmp_channel
)
228 local
->tmp_channel_type
= channel_type
;
230 if (!ieee80211_set_channel_type(local
, sdata
, channel_type
)) {
231 /* can only fail due to HT40+/- mismatch */
232 channel_type
= NL80211_CHAN_HT20
;
233 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, channel_type
));
236 if (beacon_htcap_ie
&& (prev_chantype
!= channel_type
)) {
238 * Whenever the AP announces the HT mode change that can be
239 * 40MHz intolerant or etc., it would be safer to stop tx
240 * queues before doing hw config to avoid buffer overflow.
242 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
243 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
245 /* flush out all packets */
248 drv_flush(local
, false);
251 /* channel_type change automatically detected */
252 ieee80211_hw_config(local
, 0);
254 if (prev_chantype
!= channel_type
) {
256 sta
= sta_info_get(sdata
, bssid
);
258 rate_control_rate_update(local
, sband
, sta
,
259 IEEE80211_RC_HT_CHANGED
,
264 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
265 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE
);
268 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
270 /* if bss configuration changed store the new one */
271 if (sdata
->ht_opmode_valid
!= enable_ht
||
272 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
||
273 prev_chantype
!= channel_type
) {
274 changed
|= BSS_CHANGED_HT
;
275 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
276 sdata
->ht_opmode_valid
= enable_ht
;
282 /* frame sending functions */
284 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
285 const u8
*bssid
, u16 stype
, u16 reason
,
286 void *cookie
, bool send_frame
)
288 struct ieee80211_local
*local
= sdata
->local
;
289 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
291 struct ieee80211_mgmt
*mgmt
;
293 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
297 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
299 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
301 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
302 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
303 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
304 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
306 /* u.deauth.reason_code == u.disassoc.reason_code */
307 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
309 if (stype
== IEEE80211_STYPE_DEAUTH
)
311 __cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
313 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
316 __cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
318 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
319 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
320 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
323 ieee80211_tx_skb(sdata
, skb
);
328 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
329 struct ieee80211_sub_if_data
*sdata
)
331 struct ieee80211_pspoll
*pspoll
;
334 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
338 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
339 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
341 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
342 ieee80211_tx_skb(sdata
, skb
);
345 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
346 struct ieee80211_sub_if_data
*sdata
,
350 struct ieee80211_hdr_3addr
*nullfunc
;
352 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
356 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
358 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
360 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
361 ieee80211_tx_skb(sdata
, skb
);
364 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
365 struct ieee80211_sub_if_data
*sdata
)
368 struct ieee80211_hdr
*nullfunc
;
371 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
374 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
378 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
380 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
381 memset(nullfunc
, 0, 30);
382 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
383 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
384 nullfunc
->frame_control
= fc
;
385 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
386 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
387 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
388 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
390 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
391 ieee80211_tx_skb(sdata
, skb
);
394 /* spectrum management related things */
395 static void ieee80211_chswitch_work(struct work_struct
*work
)
397 struct ieee80211_sub_if_data
*sdata
=
398 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
399 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
401 if (!ieee80211_sdata_running(sdata
))
404 mutex_lock(&ifmgd
->mtx
);
405 if (!ifmgd
->associated
)
408 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
409 if (!sdata
->local
->ops
->channel_switch
) {
410 /* call "hw_config" only if doing sw channel switch */
411 ieee80211_hw_config(sdata
->local
,
412 IEEE80211_CONF_CHANGE_CHANNEL
);
414 /* update the device channel directly */
415 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
418 /* XXX: shouldn't really modify cfg80211-owned data! */
419 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
421 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
422 IEEE80211_QUEUE_STOP_REASON_CSA
);
424 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
425 mutex_unlock(&ifmgd
->mtx
);
428 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
430 struct ieee80211_sub_if_data
*sdata
;
431 struct ieee80211_if_managed
*ifmgd
;
433 sdata
= vif_to_sdata(vif
);
434 ifmgd
= &sdata
->u
.mgd
;
436 trace_api_chswitch_done(sdata
, success
);
439 * If the channel switch was not successful, stay
440 * around on the old channel. We currently lack
441 * good handling of this situation, possibly we
442 * should just drop the association.
444 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
447 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
449 EXPORT_SYMBOL(ieee80211_chswitch_done
);
451 static void ieee80211_chswitch_timer(unsigned long data
)
453 struct ieee80211_sub_if_data
*sdata
=
454 (struct ieee80211_sub_if_data
*) data
;
455 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
457 if (sdata
->local
->quiescing
) {
458 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
462 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
465 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
466 struct ieee80211_channel_sw_ie
*sw_elem
,
467 struct ieee80211_bss
*bss
,
470 struct cfg80211_bss
*cbss
=
471 container_of((void *)bss
, struct cfg80211_bss
, priv
);
472 struct ieee80211_channel
*new_ch
;
473 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
474 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
475 cbss
->channel
->band
);
477 ASSERT_MGD_MTX(ifmgd
);
479 if (!ifmgd
->associated
)
482 if (sdata
->local
->scanning
)
485 /* Disregard subsequent beacons if we are already running a timer
488 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
491 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
492 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
495 sdata
->local
->csa_channel
= new_ch
;
497 if (sdata
->local
->ops
->channel_switch
) {
498 /* use driver's channel switch callback */
499 struct ieee80211_channel_switch ch_switch
;
500 memset(&ch_switch
, 0, sizeof(ch_switch
));
501 ch_switch
.timestamp
= timestamp
;
503 ch_switch
.block_tx
= true;
504 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
505 IEEE80211_QUEUE_STOP_REASON_CSA
);
507 ch_switch
.channel
= new_ch
;
508 ch_switch
.count
= sw_elem
->count
;
509 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
510 drv_channel_switch(sdata
->local
, &ch_switch
);
514 /* channel switch handled in software */
515 if (sw_elem
->count
<= 1) {
516 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
519 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
520 IEEE80211_QUEUE_STOP_REASON_CSA
);
521 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
522 mod_timer(&ifmgd
->chswitch_timer
,
524 msecs_to_jiffies(sw_elem
->count
*
525 cbss
->beacon_interval
));
529 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
530 u16 capab_info
, u8
*pwr_constr_elem
,
531 u8 pwr_constr_elem_len
)
533 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
535 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
538 /* Power constraint IE length should be 1 octet */
539 if (pwr_constr_elem_len
!= 1)
542 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
543 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
544 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
545 ieee80211_hw_config(sdata
->local
, 0);
549 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
551 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
552 struct ieee80211_local
*local
= sdata
->local
;
553 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
555 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
556 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
557 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
559 local
->disable_dynamic_ps
= false;
560 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
562 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
564 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
566 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
567 struct ieee80211_local
*local
= sdata
->local
;
568 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
570 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
571 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
572 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
574 local
->disable_dynamic_ps
= true;
575 conf
->dynamic_ps_timeout
= 0;
576 del_timer_sync(&local
->dynamic_ps_timer
);
577 ieee80211_queue_work(&local
->hw
,
578 &local
->dynamic_ps_enable_work
);
580 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
583 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
584 struct ieee80211_sub_if_data
*sdata
)
586 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
589 * If we are scanning right now then the parameters will
590 * take effect when scan finishes.
595 if (conf
->dynamic_ps_timeout
> 0 &&
596 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
597 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
598 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
600 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
601 ieee80211_send_nullfunc(local
, sdata
, 1);
603 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
604 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
607 conf
->flags
|= IEEE80211_CONF_PS
;
608 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
612 static void ieee80211_change_ps(struct ieee80211_local
*local
)
614 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
616 if (local
->ps_sdata
) {
617 ieee80211_enable_ps(local
, local
->ps_sdata
);
618 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
619 conf
->flags
&= ~IEEE80211_CONF_PS
;
620 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
621 del_timer_sync(&local
->dynamic_ps_timer
);
622 cancel_work_sync(&local
->dynamic_ps_enable_work
);
626 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
628 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
629 struct sta_info
*sta
= NULL
;
630 bool authorized
= false;
635 if (!mgd
->associated
)
638 if (!mgd
->associated
->beacon_ies
)
641 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
642 IEEE80211_STA_CONNECTION_POLL
))
646 sta
= sta_info_get(sdata
, mgd
->bssid
);
648 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
654 /* need to hold RTNL or interface lock */
655 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
657 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
661 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
662 local
->ps_sdata
= NULL
;
666 if (!list_empty(&local
->work_list
)) {
667 local
->ps_sdata
= NULL
;
671 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
672 if (!ieee80211_sdata_running(sdata
))
674 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
675 /* If an AP vif is found, then disable PS
676 * by setting the count to zero thereby setting
682 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
688 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
689 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
693 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
695 beaconint_us
= ieee80211_tu_to_usec(
696 found
->vif
.bss_conf
.beacon_int
);
698 timeout
= local
->dynamic_ps_forced_timeout
;
701 * Go to full PSM if the user configures a very low
702 * latency requirement.
703 * The 2000 second value is there for compatibility
704 * until the PM_QOS_NETWORK_LATENCY is configured
707 if (latency
> (1900 * USEC_PER_MSEC
) &&
708 latency
!= (2000 * USEC_PER_SEC
))
713 local
->dynamic_ps_user_timeout
= timeout
;
714 if (!local
->disable_dynamic_ps
)
715 conf
->dynamic_ps_timeout
=
716 local
->dynamic_ps_user_timeout
;
718 if (beaconint_us
> latency
) {
719 local
->ps_sdata
= NULL
;
721 struct ieee80211_bss
*bss
;
725 bss
= (void *)found
->u
.mgd
.associated
->priv
;
726 dtimper
= bss
->dtim_period
;
728 /* If the TIM IE is invalid, pretend the value is 1 */
731 else if (dtimper
> 1)
732 maxslp
= min_t(int, dtimper
,
733 latency
/ beaconint_us
);
735 local
->hw
.conf
.max_sleep_period
= maxslp
;
736 local
->hw
.conf
.ps_dtim_period
= dtimper
;
737 local
->ps_sdata
= found
;
740 local
->ps_sdata
= NULL
;
744 ieee80211_change_ps(local
);
747 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
749 struct ieee80211_local
*local
=
750 container_of(work
, struct ieee80211_local
,
751 dynamic_ps_disable_work
);
753 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
754 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
755 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
758 ieee80211_wake_queues_by_reason(&local
->hw
,
759 IEEE80211_QUEUE_STOP_REASON_PS
);
762 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
764 struct ieee80211_local
*local
=
765 container_of(work
, struct ieee80211_local
,
766 dynamic_ps_enable_work
);
767 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
768 struct ieee80211_if_managed
*ifmgd
;
772 /* can only happen when PS was just disabled anyway */
776 ifmgd
= &sdata
->u
.mgd
;
778 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
781 if (!local
->disable_dynamic_ps
&&
782 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
783 /* don't enter PS if TX frames are pending */
784 if (drv_tx_frames_pending(local
)) {
785 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
787 local
->hw
.conf
.dynamic_ps_timeout
));
792 * transmission can be stopped by others which leads to
793 * dynamic_ps_timer expiry. Postpone the ps timer if it
794 * is not the actual idle state.
796 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
797 for (q
= 0; q
< local
->hw
.queues
; q
++) {
798 if (local
->queue_stop_reasons
[q
]) {
799 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
801 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
803 local
->hw
.conf
.dynamic_ps_timeout
));
807 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
810 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
811 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
))) {
812 netif_tx_stop_all_queues(sdata
->dev
);
814 if (drv_tx_frames_pending(local
))
815 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
817 local
->hw
.conf
.dynamic_ps_timeout
));
819 ieee80211_send_nullfunc(local
, sdata
, 1);
820 /* Flush to get the tx status of nullfunc frame */
821 drv_flush(local
, false);
825 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
826 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
827 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
828 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
829 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
830 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
833 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
834 netif_tx_wake_all_queues(sdata
->dev
);
837 void ieee80211_dynamic_ps_timer(unsigned long data
)
839 struct ieee80211_local
*local
= (void *) data
;
841 if (local
->quiescing
|| local
->suspended
)
844 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
848 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
849 struct ieee80211_sub_if_data
*sdata
,
850 u8
*wmm_param
, size_t wmm_param_len
)
852 struct ieee80211_tx_queue_params params
;
853 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
856 u8
*pos
, uapsd_queues
= 0;
858 if (!local
->ops
->conf_tx
)
861 if (local
->hw
.queues
< 4)
867 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
870 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
871 uapsd_queues
= local
->uapsd_queues
;
873 count
= wmm_param
[6] & 0x0f;
874 if (count
== ifmgd
->wmm_last_param_set
)
876 ifmgd
->wmm_last_param_set
= count
;
879 left
= wmm_param_len
- 8;
881 memset(¶ms
, 0, sizeof(params
));
884 for (; left
>= 4; left
-= 4, pos
+= 4) {
885 int aci
= (pos
[0] >> 5) & 0x03;
886 int acm
= (pos
[0] >> 4) & 0x01;
894 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
895 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
901 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
902 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
908 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
909 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
916 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
917 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
922 params
.aifs
= pos
[0] & 0x0f;
923 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
924 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
925 params
.txop
= get_unaligned_le16(pos
+ 2);
926 params
.uapsd
= uapsd
;
928 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
929 wiphy_debug(local
->hw
.wiphy
,
930 "WMM queue=%d aci=%d acm=%d aifs=%d "
931 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
933 params
.aifs
, params
.cw_min
, params
.cw_max
,
934 params
.txop
, params
.uapsd
);
936 sdata
->tx_conf
[queue
] = params
;
937 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
938 wiphy_debug(local
->hw
.wiphy
,
939 "failed to set TX queue parameters for queue %d\n",
943 /* enable WMM or activate new settings */
944 sdata
->vif
.bss_conf
.qos
= true;
945 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
948 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
949 u16 capab
, bool erp_valid
, u8 erp
)
951 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
954 bool use_short_preamble
;
958 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
959 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
961 use_protection
= false;
962 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
965 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
966 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
967 use_short_slot
= true;
969 if (use_protection
!= bss_conf
->use_cts_prot
) {
970 bss_conf
->use_cts_prot
= use_protection
;
971 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
974 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
975 bss_conf
->use_short_preamble
= use_short_preamble
;
976 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
979 if (use_short_slot
!= bss_conf
->use_short_slot
) {
980 bss_conf
->use_short_slot
= use_short_slot
;
981 changed
|= BSS_CHANGED_ERP_SLOT
;
987 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
988 struct cfg80211_bss
*cbss
,
989 u32 bss_info_changed
)
991 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
992 struct ieee80211_local
*local
= sdata
->local
;
993 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
995 bss_info_changed
|= BSS_CHANGED_ASSOC
;
996 /* set timing information */
997 bss_conf
->beacon_int
= cbss
->beacon_interval
;
998 bss_conf
->timestamp
= cbss
->tsf
;
1000 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1001 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1002 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1004 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1005 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1007 sdata
->u
.mgd
.associated
= cbss
;
1008 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1010 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1012 /* just to be sure */
1013 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1014 IEEE80211_STA_BEACON_POLL
);
1016 ieee80211_led_assoc(local
, 1);
1018 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1019 bss_conf
->dtim_period
= bss
->dtim_period
;
1021 bss_conf
->dtim_period
= 0;
1023 bss_conf
->assoc
= 1;
1025 * For now just always ask the driver to update the basic rateset
1026 * when we have associated, we aren't checking whether it actually
1029 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1031 /* And the BSSID changed - we're associated now */
1032 bss_info_changed
|= BSS_CHANGED_BSSID
;
1034 /* Tell the driver to monitor connection quality (if supported) */
1035 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1036 bss_conf
->cqm_rssi_thold
)
1037 bss_info_changed
|= BSS_CHANGED_CQM
;
1039 /* Enable ARP filtering */
1040 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1041 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1042 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1045 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1047 mutex_lock(&local
->iflist_mtx
);
1048 ieee80211_recalc_ps(local
, -1);
1049 ieee80211_recalc_smps(local
);
1050 mutex_unlock(&local
->iflist_mtx
);
1052 netif_tx_start_all_queues(sdata
->dev
);
1053 netif_carrier_on(sdata
->dev
);
1056 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1057 bool remove_sta
, bool tx
)
1059 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1060 struct ieee80211_local
*local
= sdata
->local
;
1061 struct sta_info
*sta
;
1062 u32 changed
= 0, config_changed
= 0;
1065 ASSERT_MGD_MTX(ifmgd
);
1067 if (WARN_ON(!ifmgd
->associated
))
1070 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1072 ifmgd
->associated
= NULL
;
1073 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1076 * we need to commit the associated = NULL change because the
1077 * scan code uses that to determine whether this iface should
1078 * go to/wake up from powersave or not -- and could otherwise
1079 * wake the queues erroneously.
1084 * Thus, we can only afterwards stop the queues -- to account
1085 * for the case where another CPU is finishing a scan at this
1086 * time -- we don't want the scan code to enable queues.
1089 netif_tx_stop_all_queues(sdata
->dev
);
1090 netif_carrier_off(sdata
->dev
);
1092 mutex_lock(&local
->sta_mtx
);
1093 sta
= sta_info_get(sdata
, bssid
);
1095 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1096 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1098 mutex_unlock(&local
->sta_mtx
);
1100 changed
|= ieee80211_reset_erp_info(sdata
);
1102 ieee80211_led_assoc(local
, 0);
1103 changed
|= BSS_CHANGED_ASSOC
;
1104 sdata
->vif
.bss_conf
.assoc
= false;
1106 ieee80211_set_wmm_default(sdata
);
1108 /* channel(_type) changes are handled by ieee80211_hw_config */
1109 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1111 /* on the next assoc, re-program HT parameters */
1112 sdata
->ht_opmode_valid
= false;
1114 local
->power_constr_level
= 0;
1116 del_timer_sync(&local
->dynamic_ps_timer
);
1117 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1119 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1120 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1121 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1123 local
->ps_sdata
= NULL
;
1125 ieee80211_hw_config(local
, config_changed
);
1127 /* Disable ARP filtering */
1128 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1129 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1130 changed
|= BSS_CHANGED_ARP_FILTER
;
1133 /* The BSSID (not really interesting) and HT changed */
1134 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1135 ieee80211_bss_info_change_notify(sdata
, changed
);
1137 /* remove AP and TDLS peers */
1139 sta_info_flush(local
, sdata
);
1141 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1142 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1143 del_timer_sync(&sdata
->u
.mgd
.timer
);
1144 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1147 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1148 struct ieee80211_hdr
*hdr
)
1151 * We can postpone the mgd.timer whenever receiving unicast frames
1152 * from AP because we know that the connection is working both ways
1153 * at that time. But multicast frames (and hence also beacons) must
1154 * be ignored here, because we need to trigger the timer during
1155 * data idle periods for sending the periodic probe request to the
1156 * AP we're connected to.
1158 if (is_multicast_ether_addr(hdr
->addr1
))
1161 ieee80211_sta_reset_conn_monitor(sdata
);
1164 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1166 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1168 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1169 IEEE80211_STA_CONNECTION_POLL
)))
1172 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1173 IEEE80211_STA_BEACON_POLL
);
1174 mutex_lock(&sdata
->local
->iflist_mtx
);
1175 ieee80211_recalc_ps(sdata
->local
, -1);
1176 mutex_unlock(&sdata
->local
->iflist_mtx
);
1178 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1182 * We've received a probe response, but are not sure whether
1183 * we have or will be receiving any beacons or data, so let's
1184 * schedule the timers again, just in case.
1186 ieee80211_sta_reset_beacon_monitor(sdata
);
1188 mod_timer(&ifmgd
->conn_mon_timer
,
1189 round_jiffies_up(jiffies
+
1190 IEEE80211_CONNECTION_IDLE_TIME
));
1193 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1194 struct ieee80211_hdr
*hdr
, bool ack
)
1196 if (!ieee80211_is_data(hdr
->frame_control
))
1200 ieee80211_sta_reset_conn_monitor(sdata
);
1202 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1203 sdata
->u
.mgd
.probe_send_count
> 0) {
1205 sdata
->u
.mgd
.probe_send_count
= 0;
1207 sdata
->u
.mgd
.nullfunc_failed
= true;
1208 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1212 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1214 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1216 u8
*dst
= ifmgd
->associated
->bssid
;
1217 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1220 * Try sending broadcast probe requests for the last three
1221 * probe requests after the first ones failed since some
1222 * buggy APs only support broadcast probe requests.
1224 if (ifmgd
->probe_send_count
>= unicast_limit
)
1228 * When the hardware reports an accurate Tx ACK status, it's
1229 * better to send a nullfunc frame instead of a probe request,
1230 * as it will kick us off the AP quickly if we aren't associated
1231 * anymore. The timeout will be reset if the frame is ACKed by
1234 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1235 ifmgd
->nullfunc_failed
= false;
1236 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1238 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1239 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1240 (u32
) -1, true, false);
1243 ifmgd
->probe_send_count
++;
1244 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1245 run_again(ifmgd
, ifmgd
->probe_timeout
);
1248 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1251 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1252 bool already
= false;
1254 if (!ieee80211_sdata_running(sdata
))
1257 if (sdata
->local
->scanning
)
1260 if (sdata
->local
->tmp_channel
)
1263 mutex_lock(&ifmgd
->mtx
);
1265 if (!ifmgd
->associated
)
1268 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1269 if (beacon
&& net_ratelimit())
1270 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1271 "- sending probe request\n", sdata
->name
);
1275 * The driver/our work has already reported this event or the
1276 * connection monitoring has kicked in and we have already sent
1277 * a probe request. Or maybe the AP died and the driver keeps
1278 * reporting until we disassociate...
1280 * In either case we have to ignore the current call to this
1281 * function (except for setting the correct probe reason bit)
1282 * because otherwise we would reset the timer every time and
1283 * never check whether we received a probe response!
1285 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1286 IEEE80211_STA_CONNECTION_POLL
))
1290 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1292 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1297 mutex_lock(&sdata
->local
->iflist_mtx
);
1298 ieee80211_recalc_ps(sdata
->local
, -1);
1299 mutex_unlock(&sdata
->local
->iflist_mtx
);
1301 ifmgd
->probe_send_count
= 0;
1302 ieee80211_mgd_probe_ap_send(sdata
);
1304 mutex_unlock(&ifmgd
->mtx
);
1307 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1308 struct ieee80211_vif
*vif
)
1310 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1311 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1312 struct sk_buff
*skb
;
1315 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1318 ASSERT_MGD_MTX(ifmgd
);
1320 if (!ifmgd
->associated
)
1323 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1324 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1325 (u32
) -1, ssid
+ 2, ssid
[1],
1330 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1332 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1334 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1335 struct ieee80211_local
*local
= sdata
->local
;
1338 mutex_lock(&ifmgd
->mtx
);
1339 if (!ifmgd
->associated
) {
1340 mutex_unlock(&ifmgd
->mtx
);
1344 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1346 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1347 sdata
->name
, bssid
);
1349 ieee80211_set_disassoc(sdata
, true, true);
1350 mutex_unlock(&ifmgd
->mtx
);
1352 mutex_lock(&local
->mtx
);
1353 ieee80211_recalc_idle(local
);
1354 mutex_unlock(&local
->mtx
);
1356 * must be outside lock due to cfg80211,
1357 * but that's not a problem.
1359 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1360 IEEE80211_STYPE_DEAUTH
,
1361 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1365 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1367 struct ieee80211_sub_if_data
*sdata
=
1368 container_of(work
, struct ieee80211_sub_if_data
,
1369 u
.mgd
.beacon_connection_loss_work
);
1371 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1372 __ieee80211_connection_loss(sdata
);
1374 ieee80211_mgd_probe_ap(sdata
, true);
1377 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1379 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1380 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1382 trace_api_beacon_loss(sdata
);
1384 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1385 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1387 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1389 void ieee80211_connection_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_connection_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_connection_loss
);
1402 static enum rx_mgmt_action __must_check
1403 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1404 struct ieee80211_mgmt
*mgmt
, size_t len
)
1406 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1407 const u8
*bssid
= NULL
;
1411 return RX_MGMT_NONE
;
1413 ASSERT_MGD_MTX(ifmgd
);
1415 bssid
= ifmgd
->associated
->bssid
;
1417 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1419 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1420 sdata
->name
, bssid
, reason_code
);
1422 ieee80211_set_disassoc(sdata
, true, false);
1423 mutex_lock(&sdata
->local
->mtx
);
1424 ieee80211_recalc_idle(sdata
->local
);
1425 mutex_unlock(&sdata
->local
->mtx
);
1427 return RX_MGMT_CFG80211_DEAUTH
;
1431 static enum rx_mgmt_action __must_check
1432 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1433 struct ieee80211_mgmt
*mgmt
, size_t len
)
1435 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1439 return RX_MGMT_NONE
;
1441 ASSERT_MGD_MTX(ifmgd
);
1443 if (WARN_ON(!ifmgd
->associated
))
1444 return RX_MGMT_NONE
;
1446 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1447 return RX_MGMT_NONE
;
1449 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1451 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1452 sdata
->name
, mgmt
->sa
, reason_code
);
1454 ieee80211_set_disassoc(sdata
, true, false);
1455 mutex_lock(&sdata
->local
->mtx
);
1456 ieee80211_recalc_idle(sdata
->local
);
1457 mutex_unlock(&sdata
->local
->mtx
);
1458 return RX_MGMT_CFG80211_DISASSOC
;
1462 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1463 struct ieee80211_mgmt
*mgmt
, size_t len
)
1465 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1466 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1467 struct ieee80211_local
*local
= sdata
->local
;
1468 struct ieee80211_supported_band
*sband
;
1469 struct sta_info
*sta
;
1470 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1472 u32 rates
, basic_rates
;
1473 u16 capab_info
, aid
;
1474 struct ieee802_11_elems elems
;
1475 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1478 bool have_higher_than_11mbit
= false;
1479 u16 ap_ht_cap_flags
;
1481 /* AssocResp and ReassocResp have identical structure */
1483 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1484 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1486 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1487 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1488 "set\n", sdata
->name
, aid
);
1489 aid
&= ~(BIT(15) | BIT(14));
1491 pos
= mgmt
->u
.assoc_resp
.variable
;
1492 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1494 if (!elems
.supp_rates
) {
1495 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1502 mutex_lock(&sdata
->local
->sta_mtx
);
1504 * station info was already allocated and inserted before
1505 * the association and should be available to us
1507 sta
= sta_info_get_rx(sdata
, cbss
->bssid
);
1508 if (WARN_ON(!sta
)) {
1509 mutex_unlock(&sdata
->local
->sta_mtx
);
1513 set_sta_flag(sta
, WLAN_STA_AUTH
);
1514 set_sta_flag(sta
, WLAN_STA_ASSOC
);
1515 set_sta_flag(sta
, WLAN_STA_ASSOC_AP
);
1516 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1517 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1521 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1523 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1524 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1525 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1528 have_higher_than_11mbit
= true;
1530 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1531 if (sband
->bitrates
[j
].bitrate
== rate
) {
1534 basic_rates
|= BIT(j
);
1540 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1541 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1542 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1545 have_higher_than_11mbit
= true;
1547 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1548 if (sband
->bitrates
[j
].bitrate
== rate
) {
1551 basic_rates
|= BIT(j
);
1557 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1558 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1560 /* cf. IEEE 802.11 9.2.12 */
1561 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1562 have_higher_than_11mbit
)
1563 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1565 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1567 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1568 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1569 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1571 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1573 rate_control_rate_init(sta
);
1575 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1576 set_sta_flag(sta
, WLAN_STA_MFP
);
1578 if (elems
.wmm_param
)
1579 set_sta_flag(sta
, WLAN_STA_WME
);
1581 /* sta_info_reinsert will also unlock the mutex lock */
1582 err
= sta_info_reinsert(sta
);
1585 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1586 " the AP (error %d)\n", sdata
->name
, err
);
1591 * Always handle WMM once after association regardless
1592 * of the first value the AP uses. Setting -1 here has
1593 * that effect because the AP values is an unsigned
1596 ifmgd
->wmm_last_param_set
= -1;
1598 if (elems
.wmm_param
)
1599 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1600 elems
.wmm_param_len
);
1602 ieee80211_set_wmm_default(sdata
);
1604 local
->oper_channel
= wk
->chan
;
1606 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1607 (sdata
->local
->hw
.queues
>= 4) &&
1608 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1609 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1610 cbss
->bssid
, ap_ht_cap_flags
,
1613 /* set AID and assoc capability,
1614 * ieee80211_set_associated() will tell the driver */
1615 bss_conf
->aid
= aid
;
1616 bss_conf
->assoc_capability
= capab_info
;
1617 ieee80211_set_associated(sdata
, cbss
, changed
);
1620 * If we're using 4-addr mode, let the AP know that we're
1621 * doing so, so that it can create the STA VLAN on its side
1623 if (ifmgd
->use_4addr
)
1624 ieee80211_send_4addr_nullfunc(local
, sdata
);
1627 * Start timer to probe the connection to the AP now.
1628 * Also start the timer that will detect beacon loss.
1630 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1631 ieee80211_sta_reset_beacon_monitor(sdata
);
1637 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1638 struct ieee80211_mgmt
*mgmt
,
1640 struct ieee80211_rx_status
*rx_status
,
1641 struct ieee802_11_elems
*elems
,
1644 struct ieee80211_local
*local
= sdata
->local
;
1646 struct ieee80211_bss
*bss
;
1647 struct ieee80211_channel
*channel
;
1648 bool need_ps
= false;
1650 if (sdata
->u
.mgd
.associated
) {
1651 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1652 /* not previously set so we may need to recalc */
1653 need_ps
= !bss
->dtim_period
;
1656 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1657 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1660 freq
= rx_status
->freq
;
1662 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1664 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1667 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1670 ieee80211_rx_bss_put(local
, bss
);
1672 if (!sdata
->u
.mgd
.associated
)
1676 mutex_lock(&local
->iflist_mtx
);
1677 ieee80211_recalc_ps(local
, -1);
1678 mutex_unlock(&local
->iflist_mtx
);
1681 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1682 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1684 struct ieee80211_channel_sw_ie
*sw_elem
=
1685 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1686 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1687 bss
, rx_status
->mactime
);
1692 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1693 struct sk_buff
*skb
)
1695 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1696 struct ieee80211_if_managed
*ifmgd
;
1697 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1698 size_t baselen
, len
= skb
->len
;
1699 struct ieee802_11_elems elems
;
1701 ifmgd
= &sdata
->u
.mgd
;
1703 ASSERT_MGD_MTX(ifmgd
);
1705 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1706 return; /* ignore ProbeResp to foreign address */
1708 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1712 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1715 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1717 if (ifmgd
->associated
&&
1718 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1719 ieee80211_reset_ap_probe(sdata
);
1723 * This is the canonical list of information elements we care about,
1724 * the filter code also gives us all changes to the Microsoft OUI
1725 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1727 * We implement beacon filtering in software since that means we can
1728 * avoid processing the frame here and in cfg80211, and userspace
1729 * will not be able to tell whether the hardware supports it or not.
1731 * XXX: This list needs to be dynamic -- userspace needs to be able to
1732 * add items it requires. It also needs to be able to tell us to
1733 * look out for other vendor IEs.
1735 static const u64 care_about_ies
=
1736 (1ULL << WLAN_EID_COUNTRY
) |
1737 (1ULL << WLAN_EID_ERP_INFO
) |
1738 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1739 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1740 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1741 (1ULL << WLAN_EID_HT_INFORMATION
);
1743 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1744 struct ieee80211_mgmt
*mgmt
,
1746 struct ieee80211_rx_status
*rx_status
)
1748 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1749 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1751 struct ieee802_11_elems elems
;
1752 struct ieee80211_local
*local
= sdata
->local
;
1754 bool erp_valid
, directed_tim
= false;
1759 ASSERT_MGD_MTX(ifmgd
);
1761 /* Process beacon from the current BSS */
1762 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1766 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1770 * We might have received a number of frames, among them a
1771 * disassoc frame and a beacon...
1773 if (!ifmgd
->associated
)
1776 bssid
= ifmgd
->associated
->bssid
;
1779 * And in theory even frames from a different AP we were just
1780 * associated to a split-second ago!
1782 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1785 /* Track average RSSI from the Beacon frames of the current AP */
1786 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1787 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1788 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1789 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1790 ifmgd
->last_cqm_event_signal
= 0;
1791 ifmgd
->count_beacon_signal
= 1;
1792 ifmgd
->last_ave_beacon_signal
= 0;
1794 ifmgd
->ave_beacon_signal
=
1795 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1796 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1797 ifmgd
->ave_beacon_signal
) / 16;
1798 ifmgd
->count_beacon_signal
++;
1801 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1802 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1803 int sig
= ifmgd
->ave_beacon_signal
;
1804 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1807 * if signal crosses either of the boundaries, invoke callback
1808 * with appropriate parameters
1810 if (sig
> ifmgd
->rssi_max_thold
&&
1811 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1812 ifmgd
->last_ave_beacon_signal
= sig
;
1813 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1814 } else if (sig
< ifmgd
->rssi_min_thold
&&
1815 (last_sig
>= ifmgd
->rssi_max_thold
||
1817 ifmgd
->last_ave_beacon_signal
= sig
;
1818 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1822 if (bss_conf
->cqm_rssi_thold
&&
1823 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1824 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1825 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1826 int last_event
= ifmgd
->last_cqm_event_signal
;
1827 int thold
= bss_conf
->cqm_rssi_thold
;
1828 int hyst
= bss_conf
->cqm_rssi_hyst
;
1830 (last_event
== 0 || sig
< last_event
- hyst
)) {
1831 ifmgd
->last_cqm_event_signal
= sig
;
1832 ieee80211_cqm_rssi_notify(
1834 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1836 } else if (sig
> thold
&&
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_HIGH
,
1846 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1847 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1848 if (net_ratelimit()) {
1849 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1850 "to a received beacon\n", sdata
->name
);
1853 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1854 mutex_lock(&local
->iflist_mtx
);
1855 ieee80211_recalc_ps(local
, -1);
1856 mutex_unlock(&local
->iflist_mtx
);
1860 * Push the beacon loss detection into the future since
1861 * we are processing a beacon from the AP just now.
1863 ieee80211_sta_reset_beacon_monitor(sdata
);
1865 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1866 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1867 len
- baselen
, &elems
,
1868 care_about_ies
, ncrc
);
1870 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1871 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1874 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1875 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1878 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1879 elems
.wmm_param_len
);
1882 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1884 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1885 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1886 ieee80211_hw_config(local
,
1887 IEEE80211_CONF_CHANGE_PS
);
1888 ieee80211_send_nullfunc(local
, sdata
, 0);
1890 local
->pspolling
= true;
1893 * Here is assumed that the driver will be
1894 * able to send ps-poll frame and receive a
1895 * response even though power save mode is
1896 * enabled, but some drivers might require
1897 * to disable power save here. This needs
1898 * to be investigated.
1900 ieee80211_send_pspoll(local
, sdata
);
1905 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1907 ifmgd
->beacon_crc
= ncrc
;
1908 ifmgd
->beacon_crc_valid
= true;
1910 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1912 erp_value
= elems
.erp_info
[0];
1916 changed
|= ieee80211_handle_bss_capability(sdata
,
1917 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1918 erp_valid
, erp_value
);
1921 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1922 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1923 struct sta_info
*sta
;
1924 struct ieee80211_supported_band
*sband
;
1925 u16 ap_ht_cap_flags
;
1929 sta
= sta_info_get(sdata
, bssid
);
1930 if (WARN_ON(!sta
)) {
1935 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1937 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1938 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1940 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1944 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1945 bssid
, ap_ht_cap_flags
, true);
1948 /* Note: country IE parsing is done for us by cfg80211 */
1949 if (elems
.country_elem
) {
1950 /* TODO: IBSS also needs this */
1951 if (elems
.pwr_constr_elem
)
1952 ieee80211_handle_pwr_constr(sdata
,
1953 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1954 elems
.pwr_constr_elem
,
1955 elems
.pwr_constr_elem_len
);
1958 ieee80211_bss_info_change_notify(sdata
, changed
);
1961 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1962 struct sk_buff
*skb
)
1964 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1965 struct ieee80211_rx_status
*rx_status
;
1966 struct ieee80211_mgmt
*mgmt
;
1967 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1970 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1971 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1972 fc
= le16_to_cpu(mgmt
->frame_control
);
1974 mutex_lock(&ifmgd
->mtx
);
1976 if (ifmgd
->associated
&&
1977 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
1978 switch (fc
& IEEE80211_FCTL_STYPE
) {
1979 case IEEE80211_STYPE_BEACON
:
1980 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1983 case IEEE80211_STYPE_PROBE_RESP
:
1984 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
1986 case IEEE80211_STYPE_DEAUTH
:
1987 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1989 case IEEE80211_STYPE_DISASSOC
:
1990 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1992 case IEEE80211_STYPE_ACTION
:
1993 switch (mgmt
->u
.action
.category
) {
1994 case WLAN_CATEGORY_SPECTRUM_MGMT
:
1995 ieee80211_sta_process_chanswitch(sdata
,
1996 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1997 (void *)ifmgd
->associated
->priv
,
1998 rx_status
->mactime
);
2002 mutex_unlock(&ifmgd
->mtx
);
2008 case RX_MGMT_CFG80211_DEAUTH
:
2009 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2011 case RX_MGMT_CFG80211_DISASSOC
:
2012 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2015 WARN(1, "unexpected: %d", rma
);
2020 mutex_unlock(&ifmgd
->mtx
);
2022 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
2023 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
2024 struct ieee80211_local
*local
= sdata
->local
;
2025 struct ieee80211_work
*wk
;
2027 mutex_lock(&local
->mtx
);
2028 list_for_each_entry(wk
, &local
->work_list
, list
) {
2029 if (wk
->sdata
!= sdata
)
2032 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2033 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2036 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2038 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2042 * Printing the message only here means we can't
2043 * spuriously print it, but it also means that it
2044 * won't be printed when the frame comes in before
2045 * we even tried to associate or in similar cases.
2047 * Ultimately, I suspect cfg80211 should print the
2051 "%s: deauthenticated from %pM (Reason: %u)\n",
2052 sdata
->name
, mgmt
->bssid
,
2053 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2055 list_del_rcu(&wk
->list
);
2059 mutex_unlock(&local
->mtx
);
2061 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2065 static void ieee80211_sta_timer(unsigned long data
)
2067 struct ieee80211_sub_if_data
*sdata
=
2068 (struct ieee80211_sub_if_data
*) data
;
2069 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2070 struct ieee80211_local
*local
= sdata
->local
;
2072 if (local
->quiescing
) {
2073 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2077 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2080 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2081 u8
*bssid
, u8 reason
)
2083 struct ieee80211_local
*local
= sdata
->local
;
2084 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2086 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2087 IEEE80211_STA_BEACON_POLL
);
2089 ieee80211_set_disassoc(sdata
, true, true);
2090 mutex_unlock(&ifmgd
->mtx
);
2091 mutex_lock(&local
->mtx
);
2092 ieee80211_recalc_idle(local
);
2093 mutex_unlock(&local
->mtx
);
2095 * must be outside lock due to cfg80211,
2096 * but that's not a problem.
2098 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2099 IEEE80211_STYPE_DEAUTH
, reason
,
2101 mutex_lock(&ifmgd
->mtx
);
2104 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2106 struct ieee80211_local
*local
= sdata
->local
;
2107 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2109 /* then process the rest of the work */
2110 mutex_lock(&ifmgd
->mtx
);
2112 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2113 IEEE80211_STA_CONNECTION_POLL
) &&
2114 ifmgd
->associated
) {
2118 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2120 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2121 max_tries
= max_nullfunc_tries
;
2123 max_tries
= max_probe_tries
;
2125 /* ACK received for nullfunc probing frame */
2126 if (!ifmgd
->probe_send_count
)
2127 ieee80211_reset_ap_probe(sdata
);
2128 else if (ifmgd
->nullfunc_failed
) {
2129 if (ifmgd
->probe_send_count
< max_tries
) {
2130 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2131 wiphy_debug(local
->hw
.wiphy
,
2132 "%s: No ack for nullfunc frame to"
2133 " AP %pM, try %d/%i\n",
2135 ifmgd
->probe_send_count
, max_tries
);
2137 ieee80211_mgd_probe_ap_send(sdata
);
2139 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2140 wiphy_debug(local
->hw
.wiphy
,
2141 "%s: No ack for nullfunc frame to"
2142 " AP %pM, disconnecting.\n",
2143 sdata
->name
, bssid
);
2145 ieee80211_sta_connection_lost(sdata
, bssid
,
2146 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2148 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2149 run_again(ifmgd
, ifmgd
->probe_timeout
);
2150 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2151 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2152 wiphy_debug(local
->hw
.wiphy
,
2153 "%s: Failed to send nullfunc to AP %pM"
2154 " after %dms, disconnecting.\n",
2156 bssid
, probe_wait_ms
);
2158 ieee80211_sta_connection_lost(sdata
, bssid
,
2159 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2160 } else if (ifmgd
->probe_send_count
< max_tries
) {
2161 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2162 wiphy_debug(local
->hw
.wiphy
,
2163 "%s: No probe response from AP %pM"
2164 " after %dms, try %d/%i\n",
2166 bssid
, probe_wait_ms
,
2167 ifmgd
->probe_send_count
, max_tries
);
2169 ieee80211_mgd_probe_ap_send(sdata
);
2172 * We actually lost the connection ... or did we?
2175 wiphy_debug(local
->hw
.wiphy
,
2176 "%s: No probe response from AP %pM"
2177 " after %dms, disconnecting.\n",
2179 bssid
, probe_wait_ms
);
2181 ieee80211_sta_connection_lost(sdata
, bssid
,
2182 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2186 mutex_unlock(&ifmgd
->mtx
);
2189 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2191 struct ieee80211_sub_if_data
*sdata
=
2192 (struct ieee80211_sub_if_data
*) data
;
2193 struct ieee80211_local
*local
= sdata
->local
;
2195 if (local
->quiescing
)
2198 ieee80211_queue_work(&sdata
->local
->hw
,
2199 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2202 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2204 struct ieee80211_sub_if_data
*sdata
=
2205 (struct ieee80211_sub_if_data
*) data
;
2206 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2207 struct ieee80211_local
*local
= sdata
->local
;
2209 if (local
->quiescing
)
2212 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2215 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2217 struct ieee80211_sub_if_data
*sdata
=
2218 container_of(work
, struct ieee80211_sub_if_data
,
2219 u
.mgd
.monitor_work
);
2221 ieee80211_mgd_probe_ap(sdata
, false);
2224 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2226 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2227 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2228 IEEE80211_STA_CONNECTION_POLL
);
2230 /* let's probe the connection once */
2231 ieee80211_queue_work(&sdata
->local
->hw
,
2232 &sdata
->u
.mgd
.monitor_work
);
2233 /* and do all the other regular work too */
2234 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2239 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2241 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2244 * we need to use atomic bitops for the running bits
2245 * only because both timers might fire at the same
2246 * time -- the code here is properly synchronised.
2249 cancel_work_sync(&ifmgd
->request_smps_work
);
2251 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2252 if (del_timer_sync(&ifmgd
->timer
))
2253 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2255 cancel_work_sync(&ifmgd
->chswitch_work
);
2256 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2257 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2259 cancel_work_sync(&ifmgd
->monitor_work
);
2260 /* these will just be re-established on connection */
2261 del_timer_sync(&ifmgd
->conn_mon_timer
);
2262 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2265 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2267 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2269 if (!ifmgd
->associated
)
2272 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2273 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2274 mutex_lock(&ifmgd
->mtx
);
2275 if (ifmgd
->associated
) {
2276 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2277 wiphy_debug(sdata
->local
->hw
.wiphy
,
2278 "%s: driver requested disconnect after resume.\n",
2281 ieee80211_sta_connection_lost(sdata
,
2282 ifmgd
->associated
->bssid
,
2283 WLAN_REASON_UNSPECIFIED
);
2284 mutex_unlock(&ifmgd
->mtx
);
2287 mutex_unlock(&ifmgd
->mtx
);
2290 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2291 add_timer(&ifmgd
->timer
);
2292 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2293 add_timer(&ifmgd
->chswitch_timer
);
2294 ieee80211_sta_reset_beacon_monitor(sdata
);
2295 ieee80211_restart_sta_timer(sdata
);
2296 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2300 /* interface setup */
2301 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2303 struct ieee80211_if_managed
*ifmgd
;
2305 ifmgd
= &sdata
->u
.mgd
;
2306 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2307 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2308 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2309 ieee80211_beacon_connection_loss_work
);
2310 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2311 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2312 (unsigned long) sdata
);
2313 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2314 (unsigned long) sdata
);
2315 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2316 (unsigned long) sdata
);
2317 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2318 (unsigned long) sdata
);
2322 mutex_init(&ifmgd
->mtx
);
2324 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2325 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2327 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2330 /* scan finished notification */
2331 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2333 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2335 /* Restart STA timers */
2337 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2338 ieee80211_restart_sta_timer(sdata
);
2342 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2343 unsigned long data
, void *dummy
)
2345 s32 latency_usec
= (s32
) data
;
2346 struct ieee80211_local
*local
=
2347 container_of(nb
, struct ieee80211_local
,
2348 network_latency_notifier
);
2350 mutex_lock(&local
->iflist_mtx
);
2351 ieee80211_recalc_ps(local
, latency_usec
);
2352 mutex_unlock(&local
->iflist_mtx
);
2358 static enum work_done_result
2359 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2360 struct sk_buff
*skb
)
2362 struct ieee80211_local
*local
= wk
->sdata
->local
;
2365 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2369 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2370 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2374 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2375 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2376 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2378 wk
->type
= IEEE80211_WORK_AUTH
;
2379 wk
->probe_auth
.tries
= 0;
2380 return WORK_DONE_REQUEUE
;
2382 if (wk
->probe_auth
.synced
)
2383 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2384 IEEE80211_TX_SYNC_AUTH
);
2386 return WORK_DONE_DESTROY
;
2389 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2390 struct cfg80211_auth_request
*req
)
2393 struct ieee80211_work
*wk
;
2396 if (req
->local_state_change
)
2397 return 0; /* no need to update mac80211 state */
2399 switch (req
->auth_type
) {
2400 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2401 auth_alg
= WLAN_AUTH_OPEN
;
2403 case NL80211_AUTHTYPE_SHARED_KEY
:
2404 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2406 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2408 case NL80211_AUTHTYPE_FT
:
2409 auth_alg
= WLAN_AUTH_FT
;
2411 case NL80211_AUTHTYPE_NETWORK_EAP
:
2412 auth_alg
= WLAN_AUTH_LEAP
;
2418 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2422 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2424 if (req
->ie
&& req
->ie_len
) {
2425 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2426 wk
->ie_len
= req
->ie_len
;
2429 if (req
->key
&& req
->key_len
) {
2430 wk
->probe_auth
.key_len
= req
->key_len
;
2431 wk
->probe_auth
.key_idx
= req
->key_idx
;
2432 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2435 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2436 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2437 wk
->probe_auth
.ssid_len
= ssid
[1];
2439 wk
->probe_auth
.algorithm
= auth_alg
;
2440 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2442 /* if we already have a probe, don't probe again */
2443 if (req
->bss
->proberesp_ies
)
2444 wk
->type
= IEEE80211_WORK_AUTH
;
2446 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2447 wk
->chan
= req
->bss
->channel
;
2448 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2450 wk
->done
= ieee80211_probe_auth_done
;
2452 ieee80211_add_work(wk
);
2456 /* create and insert a dummy station entry */
2457 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data
*sdata
,
2459 struct sta_info
*sta
;
2462 sta
= sta_info_alloc(sdata
, bssid
, GFP_KERNEL
);
2468 err
= sta_info_insert(sta
);
2471 printk(KERN_DEBUG
"%s: failed to insert Dummy STA entry for"
2472 " the AP (error %d)\n", sdata
->name
, err
);
2479 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2480 struct sk_buff
*skb
)
2482 struct ieee80211_local
*local
= wk
->sdata
->local
;
2483 struct ieee80211_mgmt
*mgmt
;
2484 struct ieee80211_rx_status
*rx_status
;
2485 struct ieee802_11_elems elems
;
2486 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
2490 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2491 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2495 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2496 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2497 rx_status
= (void *) skb
->cb
;
2498 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2499 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2501 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2503 wk
->type
= IEEE80211_WORK_ASSOC
;
2504 /* not really done yet */
2505 return WORK_DONE_REQUEUE
;
2508 mgmt
= (void *)skb
->data
;
2509 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2511 if (status
== WLAN_STATUS_SUCCESS
) {
2512 if (wk
->assoc
.synced
)
2513 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2514 IEEE80211_TX_SYNC_ASSOC
);
2516 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2517 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2518 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2519 /* oops -- internal error -- send timeout for now */
2520 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2521 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2523 return WORK_DONE_DESTROY
;
2526 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2528 /* assoc failed - destroy the dummy station entry */
2529 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2532 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2534 if (wk
->assoc
.synced
)
2535 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2536 IEEE80211_TX_SYNC_ASSOC
);
2538 return WORK_DONE_DESTROY
;
2541 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2542 struct cfg80211_assoc_request
*req
)
2544 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2545 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2546 struct ieee80211_work
*wk
;
2550 mutex_lock(&ifmgd
->mtx
);
2551 if (ifmgd
->associated
) {
2552 if (!req
->prev_bssid
||
2553 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2556 * We are already associated and the request was not a
2557 * reassociation request from the current BSS, so
2560 mutex_unlock(&ifmgd
->mtx
);
2564 /* Trying to reassociate - clear previous association state */
2565 ieee80211_set_disassoc(sdata
, true, false);
2567 mutex_unlock(&ifmgd
->mtx
);
2569 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2574 * create a dummy station info entry in order
2575 * to start accepting incoming EAPOL packets from the station
2577 err
= ieee80211_pre_assoc(sdata
, req
->bss
->bssid
);
2583 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2584 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2586 ifmgd
->beacon_crc_valid
= false;
2588 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2589 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2590 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2591 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2592 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2595 if (req
->ie
&& req
->ie_len
) {
2596 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2597 wk
->ie_len
= req
->ie_len
;
2601 wk
->assoc
.bss
= req
->bss
;
2603 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2605 /* new association always uses requested smps mode */
2606 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2607 if (ifmgd
->powersave
)
2608 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2610 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2612 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2614 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2616 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2617 * We still associate in non-HT mode (11a/b/g) if any one of these
2618 * ciphers is configured as pairwise.
2619 * We can set this to true for non-11n hardware, that'll be checked
2620 * separately along with the peer capabilities.
2622 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2623 wk
->assoc
.capability
= req
->bss
->capability
;
2624 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2625 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2626 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2627 wk
->assoc
.ht_information_ie
=
2628 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2630 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2631 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2632 wk
->assoc
.uapsd_used
= true;
2633 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2635 wk
->assoc
.uapsd_used
= false;
2636 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2639 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2640 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2641 wk
->assoc
.ssid_len
= ssid
[1];
2643 if (req
->prev_bssid
)
2644 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2646 wk
->chan
= req
->bss
->channel
;
2647 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2649 wk
->done
= ieee80211_assoc_done
;
2650 if (!bss
->dtim_period
&&
2651 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2652 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2654 wk
->type
= IEEE80211_WORK_ASSOC
;
2657 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2658 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2660 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2661 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2664 if (req
->crypto
.control_port
)
2665 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2667 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2669 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2670 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2672 ieee80211_add_work(wk
);
2676 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2677 struct cfg80211_deauth_request
*req
,
2680 struct ieee80211_local
*local
= sdata
->local
;
2681 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2682 struct ieee80211_work
*wk
;
2684 bool assoc_bss
= false;
2686 mutex_lock(&ifmgd
->mtx
);
2688 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2689 if (ifmgd
->associated
== req
->bss
) {
2690 ieee80211_set_disassoc(sdata
, false, true);
2691 mutex_unlock(&ifmgd
->mtx
);
2694 bool not_auth_yet
= false;
2696 mutex_unlock(&ifmgd
->mtx
);
2698 mutex_lock(&local
->mtx
);
2699 list_for_each_entry(wk
, &local
->work_list
, list
) {
2700 if (wk
->sdata
!= sdata
)
2703 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2704 wk
->type
!= IEEE80211_WORK_AUTH
&&
2705 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2706 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2709 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2712 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2713 list_del_rcu(&wk
->list
);
2717 mutex_unlock(&local
->mtx
);
2720 * If somebody requests authentication and we haven't
2721 * sent out an auth frame yet there's no need to send
2722 * out a deauth frame either. If the state was PROBE,
2723 * then this is the case. If it's AUTH we have sent a
2724 * frame, and if it's IDLE we have completed the auth
2728 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2733 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2734 sdata
->name
, bssid
, req
->reason_code
);
2736 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2737 req
->reason_code
, cookie
,
2738 !req
->local_state_change
);
2740 sta_info_flush(sdata
->local
, sdata
);
2742 mutex_lock(&sdata
->local
->mtx
);
2743 ieee80211_recalc_idle(sdata
->local
);
2744 mutex_unlock(&sdata
->local
->mtx
);
2749 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2750 struct cfg80211_disassoc_request
*req
,
2753 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2756 mutex_lock(&ifmgd
->mtx
);
2759 * cfg80211 should catch this ... but it's racy since
2760 * we can receive a disassoc frame, process it, hand it
2761 * to cfg80211 while that's in a locked section already
2762 * trying to tell us that the user wants to disconnect.
2764 if (ifmgd
->associated
!= req
->bss
) {
2765 mutex_unlock(&ifmgd
->mtx
);
2769 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2770 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2772 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2773 ieee80211_set_disassoc(sdata
, false, true);
2775 mutex_unlock(&ifmgd
->mtx
);
2777 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2778 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2779 cookie
, !req
->local_state_change
);
2780 sta_info_flush(sdata
->local
, sdata
);
2782 mutex_lock(&sdata
->local
->mtx
);
2783 ieee80211_recalc_idle(sdata
->local
);
2784 mutex_unlock(&sdata
->local
->mtx
);
2789 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2790 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2793 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2795 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2797 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2799 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2801 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2803 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2804 return sdata
->dev
->operstate
;
2806 EXPORT_SYMBOL(ieee80211_get_operstate
);