2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos.h>
21 #include <linux/crc32.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
31 static int max_nullfunc_tries
= 2;
32 module_param(max_nullfunc_tries
, int, 0644);
33 MODULE_PARM_DESC(max_nullfunc_tries
,
34 "Maximum nullfunc tx tries before disconnecting (reason 4).");
36 static int max_probe_tries
= 5;
37 module_param(max_probe_tries
, int, 0644);
38 MODULE_PARM_DESC(max_probe_tries
,
39 "Maximum probe tries before disconnecting (reason 4).");
42 * Beacon loss timeout is calculated as N frames times the
43 * advertised beacon interval. This may need to be somewhat
44 * higher than what hardware might detect to account for
45 * delays in the host processing frames. But since we also
46 * probe on beacon miss before declaring the connection lost
47 * default to what we want.
49 #define IEEE80211_BEACON_LOSS_COUNT 7
52 * Time the connection can be idle before we probe
53 * it to see if we can still talk to the AP.
55 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
57 * Time we wait for a probe response after sending
58 * a probe request because of beacon loss or for
59 * checking the connection still works.
61 static int probe_wait_ms
= 500;
62 module_param(probe_wait_ms
, int, 0644);
63 MODULE_PARM_DESC(probe_wait_ms
,
64 "Maximum time(ms) to wait for probe response"
65 " before disconnecting (reason 4).");
68 * Weight given to the latest Beacon frame when calculating average signal
69 * strength for Beacon frames received in the current BSS. This must be
72 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
75 * How many Beacon frames need to have been used in average signal strength
76 * before starting to indicate signal change events.
78 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
80 #define TMR_RUNNING_TIMER 0
81 #define TMR_RUNNING_CHANSW 1
84 * All cfg80211 functions have to be called outside a locked
85 * section so that they can acquire a lock themselves... This
86 * is much simpler than queuing up things in cfg80211, but we
87 * do need some indirection for that here.
90 /* no action required */
93 /* caller must call cfg80211_send_deauth() */
94 RX_MGMT_CFG80211_DEAUTH
,
96 /* caller must call cfg80211_send_disassoc() */
97 RX_MGMT_CFG80211_DISASSOC
,
101 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
103 lockdep_assert_held(&ifmgd
->mtx
);
107 * We can have multiple work items (and connection probing)
108 * scheduling this timer, but we need to take care to only
109 * reschedule it when it should fire _earlier_ than it was
110 * asked for before, or if it's not pending right now. This
111 * function ensures that. Note that it then is required to
112 * run this function for all timeouts after the first one
113 * has happened -- the work that runs from this timer will
116 static void run_again(struct ieee80211_if_managed
*ifmgd
,
117 unsigned long timeout
)
119 ASSERT_MGD_MTX(ifmgd
);
121 if (!timer_pending(&ifmgd
->timer
) ||
122 time_before(timeout
, ifmgd
->timer
.expires
))
123 mod_timer(&ifmgd
->timer
, timeout
);
126 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data
*sdata
)
128 if (sdata
->local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
)
131 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
132 round_jiffies_up(jiffies
+ sdata
->u
.mgd
.beacon_timeout
));
135 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data
*sdata
)
137 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
139 if (unlikely(!sdata
->u
.mgd
.associated
))
142 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
145 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
146 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
148 ifmgd
->probe_send_count
= 0;
151 static int ecw2cw(int ecw
)
153 return (1 << ecw
) - 1;
157 * ieee80211_enable_ht should be called only after the operating band
158 * has been determined as ht configuration depends on the hw's
159 * HT abilities for a specific band.
161 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
162 struct ieee80211_ht_info
*hti
,
163 const u8
*bssid
, u16 ap_ht_cap_flags
,
164 bool beacon_htcap_ie
)
166 struct ieee80211_local
*local
= sdata
->local
;
167 struct ieee80211_supported_band
*sband
;
168 struct sta_info
*sta
;
172 bool enable_ht
= true;
173 enum nl80211_channel_type prev_chantype
;
174 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
176 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
178 prev_chantype
= sdata
->vif
.bss_conf
.channel_type
;
180 /* HT is not supported */
181 if (!sband
->ht_cap
.ht_supported
)
185 hti_cfreq
= ieee80211_channel_to_frequency(hti
->control_chan
,
187 /* check that channel matches the right operating channel */
188 if (local
->hw
.conf
.channel
->center_freq
!= hti_cfreq
) {
189 /* Some APs mess this up, evidently.
190 * Netgear WNDR3700 sometimes reports 4 higher than
191 * the actual channel, for instance.
194 "%s: Wrong control channel in association"
195 " response: configured center-freq: %d"
196 " hti-cfreq: %d hti->control_chan: %d"
197 " band: %d. Disabling HT.\n",
199 local
->hw
.conf
.channel
->center_freq
,
200 hti_cfreq
, hti
->control_chan
,
207 channel_type
= NL80211_CHAN_HT20
;
209 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
210 (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
;
351 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
353 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
357 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
359 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
361 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
362 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
363 IEEE80211_STA_CONNECTION_POLL
))
364 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_CTL_USE_MINRATE
;
366 ieee80211_tx_skb(sdata
, skb
);
369 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
370 struct ieee80211_sub_if_data
*sdata
)
373 struct ieee80211_hdr
*nullfunc
;
376 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
379 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
383 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
385 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
386 memset(nullfunc
, 0, 30);
387 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
388 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
389 nullfunc
->frame_control
= fc
;
390 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
391 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
392 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
393 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
395 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
396 ieee80211_tx_skb(sdata
, skb
);
399 /* spectrum management related things */
400 static void ieee80211_chswitch_work(struct work_struct
*work
)
402 struct ieee80211_sub_if_data
*sdata
=
403 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
404 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
406 if (!ieee80211_sdata_running(sdata
))
409 mutex_lock(&ifmgd
->mtx
);
410 if (!ifmgd
->associated
)
413 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
414 if (!sdata
->local
->ops
->channel_switch
) {
415 /* call "hw_config" only if doing sw channel switch */
416 ieee80211_hw_config(sdata
->local
,
417 IEEE80211_CONF_CHANGE_CHANNEL
);
419 /* update the device channel directly */
420 sdata
->local
->hw
.conf
.channel
= sdata
->local
->oper_channel
;
423 /* XXX: shouldn't really modify cfg80211-owned data! */
424 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
426 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
427 IEEE80211_QUEUE_STOP_REASON_CSA
);
429 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
430 mutex_unlock(&ifmgd
->mtx
);
433 void ieee80211_chswitch_done(struct ieee80211_vif
*vif
, bool success
)
435 struct ieee80211_sub_if_data
*sdata
;
436 struct ieee80211_if_managed
*ifmgd
;
438 sdata
= vif_to_sdata(vif
);
439 ifmgd
= &sdata
->u
.mgd
;
441 trace_api_chswitch_done(sdata
, success
);
444 * If the channel switch was not successful, stay
445 * around on the old channel. We currently lack
446 * good handling of this situation, possibly we
447 * should just drop the association.
449 sdata
->local
->csa_channel
= sdata
->local
->oper_channel
;
452 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
454 EXPORT_SYMBOL(ieee80211_chswitch_done
);
456 static void ieee80211_chswitch_timer(unsigned long data
)
458 struct ieee80211_sub_if_data
*sdata
=
459 (struct ieee80211_sub_if_data
*) data
;
460 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
462 if (sdata
->local
->quiescing
) {
463 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
467 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
470 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
471 struct ieee80211_channel_sw_ie
*sw_elem
,
472 struct ieee80211_bss
*bss
,
475 struct cfg80211_bss
*cbss
=
476 container_of((void *)bss
, struct cfg80211_bss
, priv
);
477 struct ieee80211_channel
*new_ch
;
478 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
479 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
,
480 cbss
->channel
->band
);
482 ASSERT_MGD_MTX(ifmgd
);
484 if (!ifmgd
->associated
)
487 if (sdata
->local
->scanning
)
490 /* Disregard subsequent beacons if we are already running a timer
493 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
496 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
497 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
500 sdata
->local
->csa_channel
= new_ch
;
502 if (sdata
->local
->ops
->channel_switch
) {
503 /* use driver's channel switch callback */
504 struct ieee80211_channel_switch ch_switch
;
505 memset(&ch_switch
, 0, sizeof(ch_switch
));
506 ch_switch
.timestamp
= timestamp
;
508 ch_switch
.block_tx
= true;
509 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
510 IEEE80211_QUEUE_STOP_REASON_CSA
);
512 ch_switch
.channel
= new_ch
;
513 ch_switch
.count
= sw_elem
->count
;
514 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
515 drv_channel_switch(sdata
->local
, &ch_switch
);
519 /* channel switch handled in software */
520 if (sw_elem
->count
<= 1) {
521 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
524 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
525 IEEE80211_QUEUE_STOP_REASON_CSA
);
526 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
527 mod_timer(&ifmgd
->chswitch_timer
,
529 msecs_to_jiffies(sw_elem
->count
*
530 cbss
->beacon_interval
));
534 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
535 u16 capab_info
, u8
*pwr_constr_elem
,
536 u8 pwr_constr_elem_len
)
538 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
540 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
543 /* Power constraint IE length should be 1 octet */
544 if (pwr_constr_elem_len
!= 1)
547 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
548 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
549 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
550 ieee80211_hw_config(sdata
->local
, 0);
554 void ieee80211_enable_dyn_ps(struct ieee80211_vif
*vif
)
556 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
557 struct ieee80211_local
*local
= sdata
->local
;
558 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
560 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
561 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
562 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
564 local
->disable_dynamic_ps
= false;
565 conf
->dynamic_ps_timeout
= local
->dynamic_ps_user_timeout
;
567 EXPORT_SYMBOL(ieee80211_enable_dyn_ps
);
569 void ieee80211_disable_dyn_ps(struct ieee80211_vif
*vif
)
571 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
572 struct ieee80211_local
*local
= sdata
->local
;
573 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
575 WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
||
576 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
) ||
577 (local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
));
579 local
->disable_dynamic_ps
= true;
580 conf
->dynamic_ps_timeout
= 0;
581 del_timer_sync(&local
->dynamic_ps_timer
);
582 ieee80211_queue_work(&local
->hw
,
583 &local
->dynamic_ps_enable_work
);
585 EXPORT_SYMBOL(ieee80211_disable_dyn_ps
);
588 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
589 struct ieee80211_sub_if_data
*sdata
)
591 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
594 * If we are scanning right now then the parameters will
595 * take effect when scan finishes.
600 if (conf
->dynamic_ps_timeout
> 0 &&
601 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
602 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
603 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
605 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
606 ieee80211_send_nullfunc(local
, sdata
, 1);
608 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
609 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
612 conf
->flags
|= IEEE80211_CONF_PS
;
613 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
617 static void ieee80211_change_ps(struct ieee80211_local
*local
)
619 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
621 if (local
->ps_sdata
) {
622 ieee80211_enable_ps(local
, local
->ps_sdata
);
623 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
624 conf
->flags
&= ~IEEE80211_CONF_PS
;
625 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
626 del_timer_sync(&local
->dynamic_ps_timer
);
627 cancel_work_sync(&local
->dynamic_ps_enable_work
);
631 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data
*sdata
)
633 struct ieee80211_if_managed
*mgd
= &sdata
->u
.mgd
;
634 struct sta_info
*sta
= NULL
;
635 bool authorized
= false;
643 if (!mgd
->associated
)
646 if (!mgd
->associated
->beacon_ies
)
649 if (mgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
650 IEEE80211_STA_CONNECTION_POLL
))
654 sta
= sta_info_get(sdata
, mgd
->bssid
);
656 authorized
= test_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
662 /* need to hold RTNL or interface lock */
663 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
665 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
669 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
670 local
->ps_sdata
= NULL
;
674 if (!list_empty(&local
->work_list
)) {
675 local
->ps_sdata
= NULL
;
679 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
680 if (!ieee80211_sdata_running(sdata
))
682 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
683 /* If an AP vif is found, then disable PS
684 * by setting the count to zero thereby setting
690 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
696 if (count
== 1 && ieee80211_powersave_allowed(found
)) {
697 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
701 latency
= pm_qos_request(PM_QOS_NETWORK_LATENCY
);
703 beaconint_us
= ieee80211_tu_to_usec(
704 found
->vif
.bss_conf
.beacon_int
);
706 timeout
= local
->dynamic_ps_forced_timeout
;
709 * Go to full PSM if the user configures a very low
710 * latency requirement.
711 * The 2000 second value is there for compatibility
712 * until the PM_QOS_NETWORK_LATENCY is configured
715 if (latency
> (1900 * USEC_PER_MSEC
) &&
716 latency
!= (2000 * USEC_PER_SEC
))
721 local
->dynamic_ps_user_timeout
= timeout
;
722 if (!local
->disable_dynamic_ps
)
723 conf
->dynamic_ps_timeout
=
724 local
->dynamic_ps_user_timeout
;
726 if (beaconint_us
> latency
) {
727 local
->ps_sdata
= NULL
;
729 struct ieee80211_bss
*bss
;
733 bss
= (void *)found
->u
.mgd
.associated
->priv
;
734 dtimper
= bss
->dtim_period
;
736 /* If the TIM IE is invalid, pretend the value is 1 */
739 else if (dtimper
> 1)
740 maxslp
= min_t(int, dtimper
,
741 latency
/ beaconint_us
);
743 local
->hw
.conf
.max_sleep_period
= maxslp
;
744 local
->hw
.conf
.ps_dtim_period
= dtimper
;
745 local
->ps_sdata
= found
;
748 local
->ps_sdata
= NULL
;
752 ieee80211_change_ps(local
);
755 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
757 struct ieee80211_local
*local
=
758 container_of(work
, struct ieee80211_local
,
759 dynamic_ps_disable_work
);
761 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
762 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
763 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
766 ieee80211_wake_queues_by_reason(&local
->hw
,
767 IEEE80211_QUEUE_STOP_REASON_PS
);
770 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
772 struct ieee80211_local
*local
=
773 container_of(work
, struct ieee80211_local
,
774 dynamic_ps_enable_work
);
775 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
776 struct ieee80211_if_managed
*ifmgd
;
780 /* can only happen when PS was just disabled anyway */
784 ifmgd
= &sdata
->u
.mgd
;
786 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
789 if (!local
->disable_dynamic_ps
&&
790 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
791 /* don't enter PS if TX frames are pending */
792 if (drv_tx_frames_pending(local
)) {
793 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
795 local
->hw
.conf
.dynamic_ps_timeout
));
800 * transmission can be stopped by others which leads to
801 * dynamic_ps_timer expiry. Postpone the ps timer if it
802 * is not the actual idle state.
804 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
805 for (q
= 0; q
< local
->hw
.queues
; q
++) {
806 if (local
->queue_stop_reasons
[q
]) {
807 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
,
809 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
811 local
->hw
.conf
.dynamic_ps_timeout
));
815 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
818 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
819 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
))) {
820 netif_tx_stop_all_queues(sdata
->dev
);
822 if (drv_tx_frames_pending(local
))
823 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
825 local
->hw
.conf
.dynamic_ps_timeout
));
827 ieee80211_send_nullfunc(local
, sdata
, 1);
828 /* Flush to get the tx status of nullfunc frame */
829 drv_flush(local
, false);
833 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
834 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
835 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
836 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
837 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
838 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
841 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
842 netif_tx_wake_all_queues(sdata
->dev
);
845 void ieee80211_dynamic_ps_timer(unsigned long data
)
847 struct ieee80211_local
*local
= (void *) data
;
849 if (local
->quiescing
|| local
->suspended
)
852 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
856 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
857 struct ieee80211_sub_if_data
*sdata
,
858 u8
*wmm_param
, size_t wmm_param_len
)
860 struct ieee80211_tx_queue_params params
;
861 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
864 u8
*pos
, uapsd_queues
= 0;
866 if (!local
->ops
->conf_tx
)
869 if (local
->hw
.queues
< 4)
875 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
878 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
879 uapsd_queues
= local
->uapsd_queues
;
881 count
= wmm_param
[6] & 0x0f;
882 if (count
== ifmgd
->wmm_last_param_set
)
884 ifmgd
->wmm_last_param_set
= count
;
887 left
= wmm_param_len
- 8;
889 memset(¶ms
, 0, sizeof(params
));
892 for (; left
>= 4; left
-= 4, pos
+= 4) {
893 int aci
= (pos
[0] >> 5) & 0x03;
894 int acm
= (pos
[0] >> 4) & 0x01;
902 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
903 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
909 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
910 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
916 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
917 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
924 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
925 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
930 params
.aifs
= pos
[0] & 0x0f;
931 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
932 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
933 params
.txop
= get_unaligned_le16(pos
+ 2);
934 params
.uapsd
= uapsd
;
936 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
937 wiphy_debug(local
->hw
.wiphy
,
938 "WMM queue=%d aci=%d acm=%d aifs=%d "
939 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
941 params
.aifs
, params
.cw_min
, params
.cw_max
,
942 params
.txop
, params
.uapsd
);
944 sdata
->tx_conf
[queue
] = params
;
945 if (drv_conf_tx(local
, sdata
, queue
, ¶ms
))
946 wiphy_debug(local
->hw
.wiphy
,
947 "failed to set TX queue parameters for queue %d\n",
951 /* enable WMM or activate new settings */
952 sdata
->vif
.bss_conf
.qos
= true;
953 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_QOS
);
956 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
957 u16 capab
, bool erp_valid
, u8 erp
)
959 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
962 bool use_short_preamble
;
966 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
967 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
969 use_protection
= false;
970 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
973 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
974 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
975 use_short_slot
= true;
977 if (use_protection
!= bss_conf
->use_cts_prot
) {
978 bss_conf
->use_cts_prot
= use_protection
;
979 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
982 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
983 bss_conf
->use_short_preamble
= use_short_preamble
;
984 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
987 if (use_short_slot
!= bss_conf
->use_short_slot
) {
988 bss_conf
->use_short_slot
= use_short_slot
;
989 changed
|= BSS_CHANGED_ERP_SLOT
;
995 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
996 struct cfg80211_bss
*cbss
,
997 u32 bss_info_changed
)
999 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
1000 struct ieee80211_local
*local
= sdata
->local
;
1001 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1003 bss_info_changed
|= BSS_CHANGED_ASSOC
;
1004 /* set timing information */
1005 bss_conf
->beacon_int
= cbss
->beacon_interval
;
1006 bss_conf
->timestamp
= cbss
->tsf
;
1008 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
1009 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
1010 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
1012 sdata
->u
.mgd
.beacon_timeout
= usecs_to_jiffies(ieee80211_tu_to_usec(
1013 IEEE80211_BEACON_LOSS_COUNT
* bss_conf
->beacon_int
));
1015 sdata
->u
.mgd
.associated
= cbss
;
1016 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
1018 sdata
->u
.mgd
.flags
|= IEEE80211_STA_RESET_SIGNAL_AVE
;
1020 /* just to be sure */
1021 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1022 IEEE80211_STA_BEACON_POLL
);
1024 ieee80211_led_assoc(local
, 1);
1026 if (local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
1027 bss_conf
->dtim_period
= bss
->dtim_period
;
1029 bss_conf
->dtim_period
= 0;
1031 bss_conf
->assoc
= 1;
1033 * For now just always ask the driver to update the basic rateset
1034 * when we have associated, we aren't checking whether it actually
1037 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
1039 /* And the BSSID changed - we're associated now */
1040 bss_info_changed
|= BSS_CHANGED_BSSID
;
1042 /* Tell the driver to monitor connection quality (if supported) */
1043 if ((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
) &&
1044 bss_conf
->cqm_rssi_thold
)
1045 bss_info_changed
|= BSS_CHANGED_CQM
;
1047 /* Enable ARP filtering */
1048 if (bss_conf
->arp_filter_enabled
!= sdata
->arp_filter_state
) {
1049 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
1050 bss_info_changed
|= BSS_CHANGED_ARP_FILTER
;
1053 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
1055 mutex_lock(&local
->iflist_mtx
);
1056 ieee80211_recalc_ps(local
, -1);
1057 ieee80211_recalc_smps(local
);
1058 mutex_unlock(&local
->iflist_mtx
);
1060 netif_tx_start_all_queues(sdata
->dev
);
1061 netif_carrier_on(sdata
->dev
);
1064 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1065 bool remove_sta
, bool tx
)
1067 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1068 struct ieee80211_local
*local
= sdata
->local
;
1069 struct sta_info
*sta
;
1070 u32 changed
= 0, config_changed
= 0;
1073 ASSERT_MGD_MTX(ifmgd
);
1075 if (WARN_ON(!ifmgd
->associated
))
1078 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1080 ifmgd
->associated
= NULL
;
1081 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1084 * we need to commit the associated = NULL change because the
1085 * scan code uses that to determine whether this iface should
1086 * go to/wake up from powersave or not -- and could otherwise
1087 * wake the queues erroneously.
1092 * Thus, we can only afterwards stop the queues -- to account
1093 * for the case where another CPU is finishing a scan at this
1094 * time -- we don't want the scan code to enable queues.
1097 netif_tx_stop_all_queues(sdata
->dev
);
1098 netif_carrier_off(sdata
->dev
);
1100 mutex_lock(&local
->sta_mtx
);
1101 sta
= sta_info_get(sdata
, bssid
);
1103 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
1104 ieee80211_sta_tear_down_BA_sessions(sta
, tx
);
1106 mutex_unlock(&local
->sta_mtx
);
1108 changed
|= ieee80211_reset_erp_info(sdata
);
1110 ieee80211_led_assoc(local
, 0);
1111 changed
|= BSS_CHANGED_ASSOC
;
1112 sdata
->vif
.bss_conf
.assoc
= false;
1114 ieee80211_set_wmm_default(sdata
);
1116 /* channel(_type) changes are handled by ieee80211_hw_config */
1117 WARN_ON(!ieee80211_set_channel_type(local
, sdata
, NL80211_CHAN_NO_HT
));
1119 /* on the next assoc, re-program HT parameters */
1120 sdata
->ht_opmode_valid
= false;
1122 local
->power_constr_level
= 0;
1124 del_timer_sync(&local
->dynamic_ps_timer
);
1125 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1127 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1128 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1129 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1131 local
->ps_sdata
= NULL
;
1133 ieee80211_hw_config(local
, config_changed
);
1135 /* Disable ARP filtering */
1136 if (sdata
->vif
.bss_conf
.arp_filter_enabled
) {
1137 sdata
->vif
.bss_conf
.arp_filter_enabled
= false;
1138 changed
|= BSS_CHANGED_ARP_FILTER
;
1141 /* The BSSID (not really interesting) and HT changed */
1142 changed
|= BSS_CHANGED_BSSID
| BSS_CHANGED_HT
;
1143 ieee80211_bss_info_change_notify(sdata
, changed
);
1145 /* remove AP and TDLS peers */
1147 sta_info_flush(local
, sdata
);
1149 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
1150 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
1151 del_timer_sync(&sdata
->u
.mgd
.timer
);
1152 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
1155 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1156 struct ieee80211_hdr
*hdr
)
1159 * We can postpone the mgd.timer whenever receiving unicast frames
1160 * from AP because we know that the connection is working both ways
1161 * at that time. But multicast frames (and hence also beacons) must
1162 * be ignored here, because we need to trigger the timer during
1163 * data idle periods for sending the periodic probe request to the
1164 * AP we're connected to.
1166 if (is_multicast_ether_addr(hdr
->addr1
))
1169 ieee80211_sta_reset_conn_monitor(sdata
);
1172 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data
*sdata
)
1174 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1176 if (!(ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1177 IEEE80211_STA_CONNECTION_POLL
)))
1180 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1181 IEEE80211_STA_BEACON_POLL
);
1182 mutex_lock(&sdata
->local
->iflist_mtx
);
1183 ieee80211_recalc_ps(sdata
->local
, -1);
1184 mutex_unlock(&sdata
->local
->iflist_mtx
);
1186 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1190 * We've received a probe response, but are not sure whether
1191 * we have or will be receiving any beacons or data, so let's
1192 * schedule the timers again, just in case.
1194 ieee80211_sta_reset_beacon_monitor(sdata
);
1196 mod_timer(&ifmgd
->conn_mon_timer
,
1197 round_jiffies_up(jiffies
+
1198 IEEE80211_CONNECTION_IDLE_TIME
));
1201 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data
*sdata
,
1202 struct ieee80211_hdr
*hdr
, bool ack
)
1204 if (!ieee80211_is_data(hdr
->frame_control
))
1208 ieee80211_sta_reset_conn_monitor(sdata
);
1210 if (ieee80211_is_nullfunc(hdr
->frame_control
) &&
1211 sdata
->u
.mgd
.probe_send_count
> 0) {
1213 sdata
->u
.mgd
.probe_send_count
= 0;
1215 sdata
->u
.mgd
.nullfunc_failed
= true;
1216 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
1220 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1222 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1224 u8
*dst
= ifmgd
->associated
->bssid
;
1225 u8 unicast_limit
= max(1, max_probe_tries
- 3);
1228 * Try sending broadcast probe requests for the last three
1229 * probe requests after the first ones failed since some
1230 * buggy APs only support broadcast probe requests.
1232 if (ifmgd
->probe_send_count
>= unicast_limit
)
1236 * When the hardware reports an accurate Tx ACK status, it's
1237 * better to send a nullfunc frame instead of a probe request,
1238 * as it will kick us off the AP quickly if we aren't associated
1239 * anymore. The timeout will be reset if the frame is ACKed by
1242 if (sdata
->local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
1243 ifmgd
->nullfunc_failed
= false;
1244 ieee80211_send_nullfunc(sdata
->local
, sdata
, 0);
1246 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1247 ieee80211_send_probe_req(sdata
, dst
, ssid
+ 2, ssid
[1], NULL
, 0,
1248 (u32
) -1, true, false);
1251 ifmgd
->probe_send_count
++;
1252 ifmgd
->probe_timeout
= jiffies
+ msecs_to_jiffies(probe_wait_ms
);
1253 run_again(ifmgd
, ifmgd
->probe_timeout
);
1256 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1259 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1260 bool already
= false;
1262 if (!ieee80211_sdata_running(sdata
))
1265 if (sdata
->local
->scanning
)
1268 if (sdata
->local
->tmp_channel
)
1271 mutex_lock(&ifmgd
->mtx
);
1273 if (!ifmgd
->associated
)
1276 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1277 if (beacon
&& net_ratelimit())
1278 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1279 "- sending probe request\n", sdata
->name
);
1283 * The driver/our work has already reported this event or the
1284 * connection monitoring has kicked in and we have already sent
1285 * a probe request. Or maybe the AP died and the driver keeps
1286 * reporting until we disassociate...
1288 * In either case we have to ignore the current call to this
1289 * function (except for setting the correct probe reason bit)
1290 * because otherwise we would reset the timer every time and
1291 * never check whether we received a probe response!
1293 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1294 IEEE80211_STA_CONNECTION_POLL
))
1298 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1300 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1305 mutex_lock(&sdata
->local
->iflist_mtx
);
1306 ieee80211_recalc_ps(sdata
->local
, -1);
1307 mutex_unlock(&sdata
->local
->iflist_mtx
);
1309 ifmgd
->probe_send_count
= 0;
1310 ieee80211_mgd_probe_ap_send(sdata
);
1312 mutex_unlock(&ifmgd
->mtx
);
1315 struct sk_buff
*ieee80211_ap_probereq_get(struct ieee80211_hw
*hw
,
1316 struct ieee80211_vif
*vif
)
1318 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1319 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1320 struct sk_buff
*skb
;
1323 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1326 ASSERT_MGD_MTX(ifmgd
);
1328 if (!ifmgd
->associated
)
1331 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
1332 skb
= ieee80211_build_probe_req(sdata
, ifmgd
->associated
->bssid
,
1333 (u32
) -1, ssid
+ 2, ssid
[1],
1338 EXPORT_SYMBOL(ieee80211_ap_probereq_get
);
1340 static void __ieee80211_connection_loss(struct ieee80211_sub_if_data
*sdata
)
1342 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1343 struct ieee80211_local
*local
= sdata
->local
;
1346 mutex_lock(&ifmgd
->mtx
);
1347 if (!ifmgd
->associated
) {
1348 mutex_unlock(&ifmgd
->mtx
);
1352 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1354 printk(KERN_DEBUG
"%s: Connection to AP %pM lost.\n",
1355 sdata
->name
, bssid
);
1357 ieee80211_set_disassoc(sdata
, true, true);
1358 mutex_unlock(&ifmgd
->mtx
);
1361 * must be outside lock due to cfg80211,
1362 * but that's not a problem.
1364 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1365 IEEE80211_STYPE_DEAUTH
,
1366 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1369 mutex_lock(&local
->mtx
);
1370 ieee80211_recalc_idle(local
);
1371 mutex_unlock(&local
->mtx
);
1374 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1376 struct ieee80211_sub_if_data
*sdata
=
1377 container_of(work
, struct ieee80211_sub_if_data
,
1378 u
.mgd
.beacon_connection_loss_work
);
1380 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1381 __ieee80211_connection_loss(sdata
);
1383 ieee80211_mgd_probe_ap(sdata
, true);
1386 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1388 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1389 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1391 trace_api_beacon_loss(sdata
);
1393 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1394 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1396 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1398 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1400 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1401 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1403 trace_api_connection_loss(sdata
);
1405 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1406 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1408 EXPORT_SYMBOL(ieee80211_connection_loss
);
1411 static enum rx_mgmt_action __must_check
1412 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1413 struct ieee80211_mgmt
*mgmt
, size_t len
)
1415 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1416 const u8
*bssid
= NULL
;
1420 return RX_MGMT_NONE
;
1422 ASSERT_MGD_MTX(ifmgd
);
1424 bssid
= ifmgd
->associated
->bssid
;
1426 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1428 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1429 sdata
->name
, bssid
, reason_code
);
1431 ieee80211_set_disassoc(sdata
, true, false);
1432 mutex_lock(&sdata
->local
->mtx
);
1433 ieee80211_recalc_idle(sdata
->local
);
1434 mutex_unlock(&sdata
->local
->mtx
);
1436 return RX_MGMT_CFG80211_DEAUTH
;
1440 static enum rx_mgmt_action __must_check
1441 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1442 struct ieee80211_mgmt
*mgmt
, size_t len
)
1444 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1448 return RX_MGMT_NONE
;
1450 ASSERT_MGD_MTX(ifmgd
);
1452 if (WARN_ON(!ifmgd
->associated
))
1453 return RX_MGMT_NONE
;
1455 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1456 return RX_MGMT_NONE
;
1458 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1460 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1461 sdata
->name
, mgmt
->sa
, reason_code
);
1463 ieee80211_set_disassoc(sdata
, true, false);
1464 mutex_lock(&sdata
->local
->mtx
);
1465 ieee80211_recalc_idle(sdata
->local
);
1466 mutex_unlock(&sdata
->local
->mtx
);
1467 return RX_MGMT_CFG80211_DISASSOC
;
1470 static void ieee80211_get_rates(struct ieee80211_supported_band
*sband
,
1471 u8
*supp_rates
, unsigned int supp_rates_len
,
1472 u32
*rates
, u32
*basic_rates
,
1473 bool *have_higher_than_11mbit
,
1474 int *min_rate
, int *min_rate_index
)
1478 for (i
= 0; i
< supp_rates_len
; i
++) {
1479 int rate
= (supp_rates
[i
] & 0x7f) * 5;
1480 bool is_basic
= !!(supp_rates
[i
] & 0x80);
1483 *have_higher_than_11mbit
= true;
1486 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
1487 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
1489 * Note: Even through the membership selector and the basic
1490 * rate flag share the same bit, they are not exactly
1493 if (!!(supp_rates
[i
] & 0x80) &&
1494 (supp_rates
[i
] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY
)
1497 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1498 if (sband
->bitrates
[j
].bitrate
== rate
) {
1501 *basic_rates
|= BIT(j
);
1502 if (rate
< *min_rate
) {
1504 *min_rate_index
= j
;
1512 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1513 struct ieee80211_mgmt
*mgmt
, size_t len
)
1515 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1516 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1517 struct ieee80211_local
*local
= sdata
->local
;
1518 struct ieee80211_supported_band
*sband
;
1519 struct sta_info
*sta
;
1520 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1522 u32 rates
, basic_rates
;
1523 u16 capab_info
, aid
;
1524 struct ieee802_11_elems elems
;
1525 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1528 bool have_higher_than_11mbit
= false;
1529 u16 ap_ht_cap_flags
;
1530 int min_rate
= INT_MAX
, min_rate_index
= -1;
1532 /* AssocResp and ReassocResp have identical structure */
1534 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1535 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1537 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1539 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1541 aid
&= ~(BIT(15) | BIT(14));
1543 ifmgd
->broken_ap
= false;
1545 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1547 "%s: invalid AID value %d (out of range), turn off PS\n",
1550 ifmgd
->broken_ap
= true;
1553 pos
= mgmt
->u
.assoc_resp
.variable
;
1554 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1556 if (!elems
.supp_rates
) {
1557 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1564 mutex_lock(&sdata
->local
->sta_mtx
);
1566 * station info was already allocated and inserted before
1567 * the association and should be available to us
1569 sta
= sta_info_get_rx(sdata
, cbss
->bssid
);
1570 if (WARN_ON(!sta
)) {
1571 mutex_unlock(&sdata
->local
->sta_mtx
);
1575 set_sta_flag(sta
, WLAN_STA_AUTH
);
1576 set_sta_flag(sta
, WLAN_STA_ASSOC
);
1577 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1578 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1582 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1584 ieee80211_get_rates(sband
, elems
.supp_rates
, elems
.supp_rates_len
,
1585 &rates
, &basic_rates
, &have_higher_than_11mbit
,
1586 &min_rate
, &min_rate_index
);
1588 ieee80211_get_rates(sband
, elems
.ext_supp_rates
,
1589 elems
.ext_supp_rates_len
, &rates
, &basic_rates
,
1590 &have_higher_than_11mbit
,
1591 &min_rate
, &min_rate_index
);
1594 * some buggy APs don't advertise basic_rates. use the lowest
1595 * supported rate instead.
1597 if (unlikely(!basic_rates
) && min_rate_index
>= 0) {
1598 printk(KERN_DEBUG
"%s: No basic rates in AssocResp. "
1599 "Using min supported rate instead.\n", sdata
->name
);
1600 basic_rates
= BIT(min_rate_index
);
1603 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1604 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1606 /* cf. IEEE 802.11 9.2.12 */
1607 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1608 have_higher_than_11mbit
)
1609 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1611 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1613 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1614 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1615 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1617 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1619 rate_control_rate_init(sta
);
1621 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1622 set_sta_flag(sta
, WLAN_STA_MFP
);
1624 if (elems
.wmm_param
)
1625 set_sta_flag(sta
, WLAN_STA_WME
);
1627 /* sta_info_reinsert will also unlock the mutex lock */
1628 err
= sta_info_reinsert(sta
);
1631 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1632 " the AP (error %d)\n", sdata
->name
, err
);
1637 * Always handle WMM once after association regardless
1638 * of the first value the AP uses. Setting -1 here has
1639 * that effect because the AP values is an unsigned
1642 ifmgd
->wmm_last_param_set
= -1;
1644 if (elems
.wmm_param
)
1645 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1646 elems
.wmm_param_len
);
1648 ieee80211_set_wmm_default(sdata
);
1650 local
->oper_channel
= wk
->chan
;
1652 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1653 (sdata
->local
->hw
.queues
>= 4) &&
1654 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1655 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1656 cbss
->bssid
, ap_ht_cap_flags
,
1659 /* set AID and assoc capability,
1660 * ieee80211_set_associated() will tell the driver */
1661 bss_conf
->aid
= aid
;
1662 bss_conf
->assoc_capability
= capab_info
;
1663 ieee80211_set_associated(sdata
, cbss
, changed
);
1666 * If we're using 4-addr mode, let the AP know that we're
1667 * doing so, so that it can create the STA VLAN on its side
1669 if (ifmgd
->use_4addr
)
1670 ieee80211_send_4addr_nullfunc(local
, sdata
);
1673 * Start timer to probe the connection to the AP now.
1674 * Also start the timer that will detect beacon loss.
1676 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1677 ieee80211_sta_reset_beacon_monitor(sdata
);
1683 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1684 struct ieee80211_mgmt
*mgmt
,
1686 struct ieee80211_rx_status
*rx_status
,
1687 struct ieee802_11_elems
*elems
,
1690 struct ieee80211_local
*local
= sdata
->local
;
1692 struct ieee80211_bss
*bss
;
1693 struct ieee80211_channel
*channel
;
1694 bool need_ps
= false;
1696 if (sdata
->u
.mgd
.associated
) {
1697 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1698 /* not previously set so we may need to recalc */
1699 need_ps
= !bss
->dtim_period
;
1702 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1703 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1706 freq
= rx_status
->freq
;
1708 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1710 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1713 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1716 ieee80211_rx_bss_put(local
, bss
);
1718 if (!sdata
->u
.mgd
.associated
)
1722 mutex_lock(&local
->iflist_mtx
);
1723 ieee80211_recalc_ps(local
, -1);
1724 mutex_unlock(&local
->iflist_mtx
);
1727 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1728 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1730 struct ieee80211_channel_sw_ie
*sw_elem
=
1731 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1732 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1733 bss
, rx_status
->mactime
);
1738 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1739 struct sk_buff
*skb
)
1741 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1742 struct ieee80211_if_managed
*ifmgd
;
1743 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1744 size_t baselen
, len
= skb
->len
;
1745 struct ieee802_11_elems elems
;
1747 ifmgd
= &sdata
->u
.mgd
;
1749 ASSERT_MGD_MTX(ifmgd
);
1751 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1752 return; /* ignore ProbeResp to foreign address */
1754 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1758 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1761 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1763 if (ifmgd
->associated
&&
1764 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1765 ieee80211_reset_ap_probe(sdata
);
1769 * This is the canonical list of information elements we care about,
1770 * the filter code also gives us all changes to the Microsoft OUI
1771 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1773 * We implement beacon filtering in software since that means we can
1774 * avoid processing the frame here and in cfg80211, and userspace
1775 * will not be able to tell whether the hardware supports it or not.
1777 * XXX: This list needs to be dynamic -- userspace needs to be able to
1778 * add items it requires. It also needs to be able to tell us to
1779 * look out for other vendor IEs.
1781 static const u64 care_about_ies
=
1782 (1ULL << WLAN_EID_COUNTRY
) |
1783 (1ULL << WLAN_EID_ERP_INFO
) |
1784 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1785 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1786 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1787 (1ULL << WLAN_EID_HT_INFORMATION
);
1789 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1790 struct ieee80211_mgmt
*mgmt
,
1792 struct ieee80211_rx_status
*rx_status
)
1794 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1795 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1797 struct ieee802_11_elems elems
;
1798 struct ieee80211_local
*local
= sdata
->local
;
1800 bool erp_valid
, directed_tim
= false;
1805 ASSERT_MGD_MTX(ifmgd
);
1807 /* Process beacon from the current BSS */
1808 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1812 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1816 * We might have received a number of frames, among them a
1817 * disassoc frame and a beacon...
1819 if (!ifmgd
->associated
)
1822 bssid
= ifmgd
->associated
->bssid
;
1825 * And in theory even frames from a different AP we were just
1826 * associated to a split-second ago!
1828 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1831 /* Track average RSSI from the Beacon frames of the current AP */
1832 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1833 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1834 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1835 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1836 ifmgd
->last_cqm_event_signal
= 0;
1837 ifmgd
->count_beacon_signal
= 1;
1838 ifmgd
->last_ave_beacon_signal
= 0;
1840 ifmgd
->ave_beacon_signal
=
1841 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1842 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1843 ifmgd
->ave_beacon_signal
) / 16;
1844 ifmgd
->count_beacon_signal
++;
1847 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1848 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1849 int sig
= ifmgd
->ave_beacon_signal
;
1850 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1853 * if signal crosses either of the boundaries, invoke callback
1854 * with appropriate parameters
1856 if (sig
> ifmgd
->rssi_max_thold
&&
1857 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1858 ifmgd
->last_ave_beacon_signal
= sig
;
1859 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1860 } else if (sig
< ifmgd
->rssi_min_thold
&&
1861 (last_sig
>= ifmgd
->rssi_max_thold
||
1863 ifmgd
->last_ave_beacon_signal
= sig
;
1864 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1868 if (bss_conf
->cqm_rssi_thold
&&
1869 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1870 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1871 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1872 int last_event
= ifmgd
->last_cqm_event_signal
;
1873 int thold
= bss_conf
->cqm_rssi_thold
;
1874 int hyst
= bss_conf
->cqm_rssi_hyst
;
1876 (last_event
== 0 || sig
< last_event
- hyst
)) {
1877 ifmgd
->last_cqm_event_signal
= sig
;
1878 ieee80211_cqm_rssi_notify(
1880 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1882 } else if (sig
> thold
&&
1883 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1884 ifmgd
->last_cqm_event_signal
= sig
;
1885 ieee80211_cqm_rssi_notify(
1887 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1892 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1893 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1894 if (net_ratelimit()) {
1895 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1896 "to a received beacon\n", sdata
->name
);
1899 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1900 mutex_lock(&local
->iflist_mtx
);
1901 ieee80211_recalc_ps(local
, -1);
1902 mutex_unlock(&local
->iflist_mtx
);
1906 * Push the beacon loss detection into the future since
1907 * we are processing a beacon from the AP just now.
1909 ieee80211_sta_reset_beacon_monitor(sdata
);
1911 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1912 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1913 len
- baselen
, &elems
,
1914 care_about_ies
, ncrc
);
1916 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1917 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1920 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1921 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1924 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1925 elems
.wmm_param_len
);
1928 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1930 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1931 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1932 ieee80211_hw_config(local
,
1933 IEEE80211_CONF_CHANGE_PS
);
1934 ieee80211_send_nullfunc(local
, sdata
, 0);
1936 local
->pspolling
= true;
1939 * Here is assumed that the driver will be
1940 * able to send ps-poll frame and receive a
1941 * response even though power save mode is
1942 * enabled, but some drivers might require
1943 * to disable power save here. This needs
1944 * to be investigated.
1946 ieee80211_send_pspoll(local
, sdata
);
1951 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1953 ifmgd
->beacon_crc
= ncrc
;
1954 ifmgd
->beacon_crc_valid
= true;
1956 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1958 erp_value
= elems
.erp_info
[0];
1962 changed
|= ieee80211_handle_bss_capability(sdata
,
1963 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1964 erp_valid
, erp_value
);
1967 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1968 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1969 struct sta_info
*sta
;
1970 struct ieee80211_supported_band
*sband
;
1971 u16 ap_ht_cap_flags
;
1975 sta
= sta_info_get(sdata
, bssid
);
1976 if (WARN_ON(!sta
)) {
1981 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1983 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1984 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1986 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1990 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1991 bssid
, ap_ht_cap_flags
, true);
1994 /* Note: country IE parsing is done for us by cfg80211 */
1995 if (elems
.country_elem
) {
1996 /* TODO: IBSS also needs this */
1997 if (elems
.pwr_constr_elem
)
1998 ieee80211_handle_pwr_constr(sdata
,
1999 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2000 elems
.pwr_constr_elem
,
2001 elems
.pwr_constr_elem_len
);
2004 ieee80211_bss_info_change_notify(sdata
, changed
);
2007 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2008 struct sk_buff
*skb
)
2010 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2011 struct ieee80211_rx_status
*rx_status
;
2012 struct ieee80211_mgmt
*mgmt
;
2013 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2016 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2017 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2018 fc
= le16_to_cpu(mgmt
->frame_control
);
2020 mutex_lock(&ifmgd
->mtx
);
2022 if (ifmgd
->associated
&&
2023 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
2024 switch (fc
& IEEE80211_FCTL_STYPE
) {
2025 case IEEE80211_STYPE_BEACON
:
2026 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
2029 case IEEE80211_STYPE_PROBE_RESP
:
2030 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2032 case IEEE80211_STYPE_DEAUTH
:
2033 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2035 case IEEE80211_STYPE_DISASSOC
:
2036 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2038 case IEEE80211_STYPE_ACTION
:
2039 switch (mgmt
->u
.action
.category
) {
2040 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2041 ieee80211_sta_process_chanswitch(sdata
,
2042 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2043 (void *)ifmgd
->associated
->priv
,
2044 rx_status
->mactime
);
2048 mutex_unlock(&ifmgd
->mtx
);
2054 case RX_MGMT_CFG80211_DEAUTH
:
2055 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2057 case RX_MGMT_CFG80211_DISASSOC
:
2058 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2061 WARN(1, "unexpected: %d", rma
);
2066 mutex_unlock(&ifmgd
->mtx
);
2068 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
2069 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
2070 struct ieee80211_local
*local
= sdata
->local
;
2071 struct ieee80211_work
*wk
;
2073 mutex_lock(&local
->mtx
);
2074 list_for_each_entry(wk
, &local
->work_list
, list
) {
2075 if (wk
->sdata
!= sdata
)
2078 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2079 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2082 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2084 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2088 * Printing the message only here means we can't
2089 * spuriously print it, but it also means that it
2090 * won't be printed when the frame comes in before
2091 * we even tried to associate or in similar cases.
2093 * Ultimately, I suspect cfg80211 should print the
2097 "%s: deauthenticated from %pM (Reason: %u)\n",
2098 sdata
->name
, mgmt
->bssid
,
2099 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2101 list_del_rcu(&wk
->list
);
2105 mutex_unlock(&local
->mtx
);
2107 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2111 static void ieee80211_sta_timer(unsigned long data
)
2113 struct ieee80211_sub_if_data
*sdata
=
2114 (struct ieee80211_sub_if_data
*) data
;
2115 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2116 struct ieee80211_local
*local
= sdata
->local
;
2118 if (local
->quiescing
) {
2119 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2123 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2126 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2127 u8
*bssid
, u8 reason
)
2129 struct ieee80211_local
*local
= sdata
->local
;
2130 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2132 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2133 IEEE80211_STA_BEACON_POLL
);
2135 ieee80211_set_disassoc(sdata
, true, true);
2136 mutex_unlock(&ifmgd
->mtx
);
2138 * must be outside lock due to cfg80211,
2139 * but that's not a problem.
2141 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2142 IEEE80211_STYPE_DEAUTH
, reason
,
2145 mutex_lock(&local
->mtx
);
2146 ieee80211_recalc_idle(local
);
2147 mutex_unlock(&local
->mtx
);
2149 mutex_lock(&ifmgd
->mtx
);
2152 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2154 struct ieee80211_local
*local
= sdata
->local
;
2155 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2157 /* then process the rest of the work */
2158 mutex_lock(&ifmgd
->mtx
);
2160 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2161 IEEE80211_STA_CONNECTION_POLL
) &&
2162 ifmgd
->associated
) {
2166 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2168 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2169 max_tries
= max_nullfunc_tries
;
2171 max_tries
= max_probe_tries
;
2173 /* ACK received for nullfunc probing frame */
2174 if (!ifmgd
->probe_send_count
)
2175 ieee80211_reset_ap_probe(sdata
);
2176 else if (ifmgd
->nullfunc_failed
) {
2177 if (ifmgd
->probe_send_count
< max_tries
) {
2178 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2179 wiphy_debug(local
->hw
.wiphy
,
2180 "%s: No ack for nullfunc frame to"
2181 " AP %pM, try %d/%i\n",
2183 ifmgd
->probe_send_count
, max_tries
);
2185 ieee80211_mgd_probe_ap_send(sdata
);
2187 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2188 wiphy_debug(local
->hw
.wiphy
,
2189 "%s: No ack for nullfunc frame to"
2190 " AP %pM, disconnecting.\n",
2191 sdata
->name
, bssid
);
2193 ieee80211_sta_connection_lost(sdata
, bssid
,
2194 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2196 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2197 run_again(ifmgd
, ifmgd
->probe_timeout
);
2198 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2199 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2200 wiphy_debug(local
->hw
.wiphy
,
2201 "%s: Failed to send nullfunc to AP %pM"
2202 " after %dms, disconnecting.\n",
2204 bssid
, probe_wait_ms
);
2206 ieee80211_sta_connection_lost(sdata
, bssid
,
2207 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2208 } else if (ifmgd
->probe_send_count
< max_tries
) {
2209 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2210 wiphy_debug(local
->hw
.wiphy
,
2211 "%s: No probe response from AP %pM"
2212 " after %dms, try %d/%i\n",
2214 bssid
, probe_wait_ms
,
2215 ifmgd
->probe_send_count
, max_tries
);
2217 ieee80211_mgd_probe_ap_send(sdata
);
2220 * We actually lost the connection ... or did we?
2223 wiphy_debug(local
->hw
.wiphy
,
2224 "%s: No probe response from AP %pM"
2225 " after %dms, disconnecting.\n",
2227 bssid
, probe_wait_ms
);
2229 ieee80211_sta_connection_lost(sdata
, bssid
,
2230 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2234 mutex_unlock(&ifmgd
->mtx
);
2237 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2239 struct ieee80211_sub_if_data
*sdata
=
2240 (struct ieee80211_sub_if_data
*) data
;
2241 struct ieee80211_local
*local
= sdata
->local
;
2243 if (local
->quiescing
)
2246 ieee80211_queue_work(&sdata
->local
->hw
,
2247 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2250 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2252 struct ieee80211_sub_if_data
*sdata
=
2253 (struct ieee80211_sub_if_data
*) data
;
2254 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2255 struct ieee80211_local
*local
= sdata
->local
;
2257 if (local
->quiescing
)
2260 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2263 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2265 struct ieee80211_sub_if_data
*sdata
=
2266 container_of(work
, struct ieee80211_sub_if_data
,
2267 u
.mgd
.monitor_work
);
2269 ieee80211_mgd_probe_ap(sdata
, false);
2272 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2274 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2275 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2276 IEEE80211_STA_CONNECTION_POLL
);
2278 /* let's probe the connection once */
2279 ieee80211_queue_work(&sdata
->local
->hw
,
2280 &sdata
->u
.mgd
.monitor_work
);
2281 /* and do all the other regular work too */
2282 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2287 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2289 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2292 * we need to use atomic bitops for the running bits
2293 * only because both timers might fire at the same
2294 * time -- the code here is properly synchronised.
2297 cancel_work_sync(&ifmgd
->request_smps_work
);
2299 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2300 if (del_timer_sync(&ifmgd
->timer
))
2301 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2303 cancel_work_sync(&ifmgd
->chswitch_work
);
2304 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2305 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2307 cancel_work_sync(&ifmgd
->monitor_work
);
2308 /* these will just be re-established on connection */
2309 del_timer_sync(&ifmgd
->conn_mon_timer
);
2310 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2313 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2315 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2317 if (!ifmgd
->associated
)
2320 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2321 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2322 mutex_lock(&ifmgd
->mtx
);
2323 if (ifmgd
->associated
) {
2324 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2325 wiphy_debug(sdata
->local
->hw
.wiphy
,
2326 "%s: driver requested disconnect after resume.\n",
2329 ieee80211_sta_connection_lost(sdata
,
2330 ifmgd
->associated
->bssid
,
2331 WLAN_REASON_UNSPECIFIED
);
2332 mutex_unlock(&ifmgd
->mtx
);
2335 mutex_unlock(&ifmgd
->mtx
);
2338 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2339 add_timer(&ifmgd
->timer
);
2340 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2341 add_timer(&ifmgd
->chswitch_timer
);
2342 ieee80211_sta_reset_beacon_monitor(sdata
);
2343 ieee80211_restart_sta_timer(sdata
);
2344 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2348 /* interface setup */
2349 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2351 struct ieee80211_if_managed
*ifmgd
;
2353 ifmgd
= &sdata
->u
.mgd
;
2354 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2355 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2356 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2357 ieee80211_beacon_connection_loss_work
);
2358 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2359 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2360 (unsigned long) sdata
);
2361 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2362 (unsigned long) sdata
);
2363 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2364 (unsigned long) sdata
);
2365 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2366 (unsigned long) sdata
);
2370 mutex_init(&ifmgd
->mtx
);
2372 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2373 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2375 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2378 /* scan finished notification */
2379 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2381 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2383 /* Restart STA timers */
2385 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2386 ieee80211_restart_sta_timer(sdata
);
2390 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2391 unsigned long data
, void *dummy
)
2393 s32 latency_usec
= (s32
) data
;
2394 struct ieee80211_local
*local
=
2395 container_of(nb
, struct ieee80211_local
,
2396 network_latency_notifier
);
2398 mutex_lock(&local
->iflist_mtx
);
2399 ieee80211_recalc_ps(local
, latency_usec
);
2400 mutex_unlock(&local
->iflist_mtx
);
2406 static enum work_done_result
2407 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2408 struct sk_buff
*skb
)
2410 struct ieee80211_local
*local
= wk
->sdata
->local
;
2413 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2417 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2418 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2422 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2423 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2424 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2426 wk
->type
= IEEE80211_WORK_AUTH
;
2427 wk
->probe_auth
.tries
= 0;
2428 return WORK_DONE_REQUEUE
;
2430 if (wk
->probe_auth
.synced
)
2431 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2432 IEEE80211_TX_SYNC_AUTH
);
2434 return WORK_DONE_DESTROY
;
2437 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2438 struct cfg80211_auth_request
*req
)
2441 struct ieee80211_work
*wk
;
2444 if (req
->local_state_change
)
2445 return 0; /* no need to update mac80211 state */
2447 switch (req
->auth_type
) {
2448 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2449 auth_alg
= WLAN_AUTH_OPEN
;
2451 case NL80211_AUTHTYPE_SHARED_KEY
:
2452 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2454 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2456 case NL80211_AUTHTYPE_FT
:
2457 auth_alg
= WLAN_AUTH_FT
;
2459 case NL80211_AUTHTYPE_NETWORK_EAP
:
2460 auth_alg
= WLAN_AUTH_LEAP
;
2466 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2470 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2472 if (req
->ie
&& req
->ie_len
) {
2473 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2474 wk
->ie_len
= req
->ie_len
;
2477 if (req
->key
&& req
->key_len
) {
2478 wk
->probe_auth
.key_len
= req
->key_len
;
2479 wk
->probe_auth
.key_idx
= req
->key_idx
;
2480 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2483 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2484 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2485 wk
->probe_auth
.ssid_len
= ssid
[1];
2487 wk
->probe_auth
.algorithm
= auth_alg
;
2488 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2490 /* if we already have a probe, don't probe again */
2491 if (req
->bss
->proberesp_ies
)
2492 wk
->type
= IEEE80211_WORK_AUTH
;
2494 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2495 wk
->chan
= req
->bss
->channel
;
2496 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2498 wk
->done
= ieee80211_probe_auth_done
;
2500 ieee80211_add_work(wk
);
2504 /* create and insert a dummy station entry */
2505 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data
*sdata
,
2507 struct sta_info
*sta
;
2510 sta
= sta_info_alloc(sdata
, bssid
, GFP_KERNEL
);
2516 err
= sta_info_insert(sta
);
2519 printk(KERN_DEBUG
"%s: failed to insert Dummy STA entry for"
2520 " the AP (error %d)\n", sdata
->name
, err
);
2527 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2528 struct sk_buff
*skb
)
2530 struct ieee80211_local
*local
= wk
->sdata
->local
;
2531 struct ieee80211_mgmt
*mgmt
;
2532 struct ieee80211_rx_status
*rx_status
;
2533 struct ieee802_11_elems elems
;
2534 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
2538 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2539 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2543 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2544 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2545 rx_status
= (void *) skb
->cb
;
2546 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2547 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2549 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2551 wk
->type
= IEEE80211_WORK_ASSOC
;
2552 /* not really done yet */
2553 return WORK_DONE_REQUEUE
;
2556 mgmt
= (void *)skb
->data
;
2557 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2559 if (status
== WLAN_STATUS_SUCCESS
) {
2560 if (wk
->assoc
.synced
)
2561 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2562 IEEE80211_TX_SYNC_ASSOC
);
2564 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2565 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2566 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2567 /* oops -- internal error -- send timeout for now */
2568 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2569 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2571 return WORK_DONE_DESTROY
;
2574 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2576 /* assoc failed - destroy the dummy station entry */
2577 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2580 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2582 if (wk
->assoc
.synced
)
2583 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2584 IEEE80211_TX_SYNC_ASSOC
);
2586 return WORK_DONE_DESTROY
;
2589 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2590 struct cfg80211_assoc_request
*req
)
2592 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2593 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2594 struct ieee80211_work
*wk
;
2598 mutex_lock(&ifmgd
->mtx
);
2599 if (ifmgd
->associated
) {
2600 if (!req
->prev_bssid
||
2601 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2604 * We are already associated and the request was not a
2605 * reassociation request from the current BSS, so
2608 mutex_unlock(&ifmgd
->mtx
);
2612 /* Trying to reassociate - clear previous association state */
2613 ieee80211_set_disassoc(sdata
, true, false);
2615 mutex_unlock(&ifmgd
->mtx
);
2617 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2622 * create a dummy station info entry in order
2623 * to start accepting incoming EAPOL packets from the station
2625 err
= ieee80211_pre_assoc(sdata
, req
->bss
->bssid
);
2631 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2632 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2634 ifmgd
->beacon_crc_valid
= false;
2636 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2637 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2638 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2639 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2640 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2643 if (req
->ie
&& req
->ie_len
) {
2644 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2645 wk
->ie_len
= req
->ie_len
;
2649 wk
->assoc
.bss
= req
->bss
;
2651 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2653 /* new association always uses requested smps mode */
2654 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2655 if (ifmgd
->powersave
)
2656 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2658 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2660 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2662 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2664 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2665 * We still associate in non-HT mode (11a/b/g) if any one of these
2666 * ciphers is configured as pairwise.
2667 * We can set this to true for non-11n hardware, that'll be checked
2668 * separately along with the peer capabilities.
2670 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2671 wk
->assoc
.capability
= req
->bss
->capability
;
2672 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2673 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2674 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2675 wk
->assoc
.ht_information_ie
=
2676 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2678 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2679 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2680 wk
->assoc
.uapsd_used
= true;
2681 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2683 wk
->assoc
.uapsd_used
= false;
2684 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2687 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2688 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2689 wk
->assoc
.ssid_len
= ssid
[1];
2691 if (req
->prev_bssid
)
2692 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2694 wk
->chan
= req
->bss
->channel
;
2695 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2697 wk
->done
= ieee80211_assoc_done
;
2698 if (!bss
->dtim_period
&&
2699 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2700 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2702 wk
->type
= IEEE80211_WORK_ASSOC
;
2705 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2706 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2708 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2709 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2712 if (req
->crypto
.control_port
)
2713 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2715 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2717 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2718 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2720 ieee80211_add_work(wk
);
2724 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2725 struct cfg80211_deauth_request
*req
,
2728 struct ieee80211_local
*local
= sdata
->local
;
2729 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2730 struct ieee80211_work
*wk
;
2732 bool assoc_bss
= false;
2734 mutex_lock(&ifmgd
->mtx
);
2736 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2737 if (ifmgd
->associated
== req
->bss
) {
2738 ieee80211_set_disassoc(sdata
, false, true);
2739 mutex_unlock(&ifmgd
->mtx
);
2742 bool not_auth_yet
= false;
2744 mutex_unlock(&ifmgd
->mtx
);
2746 mutex_lock(&local
->mtx
);
2747 list_for_each_entry(wk
, &local
->work_list
, list
) {
2748 if (wk
->sdata
!= sdata
)
2751 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2752 wk
->type
!= IEEE80211_WORK_AUTH
&&
2753 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2754 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2757 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2760 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2761 list_del_rcu(&wk
->list
);
2765 mutex_unlock(&local
->mtx
);
2768 * If somebody requests authentication and we haven't
2769 * sent out an auth frame yet there's no need to send
2770 * out a deauth frame either. If the state was PROBE,
2771 * then this is the case. If it's AUTH we have sent a
2772 * frame, and if it's IDLE we have completed the auth
2776 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2781 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2782 sdata
->name
, bssid
, req
->reason_code
);
2784 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2785 req
->reason_code
, cookie
,
2786 !req
->local_state_change
);
2788 sta_info_flush(sdata
->local
, sdata
);
2790 mutex_lock(&sdata
->local
->mtx
);
2791 ieee80211_recalc_idle(sdata
->local
);
2792 mutex_unlock(&sdata
->local
->mtx
);
2797 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2798 struct cfg80211_disassoc_request
*req
,
2801 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2804 mutex_lock(&ifmgd
->mtx
);
2807 * cfg80211 should catch this ... but it's racy since
2808 * we can receive a disassoc frame, process it, hand it
2809 * to cfg80211 while that's in a locked section already
2810 * trying to tell us that the user wants to disconnect.
2812 if (ifmgd
->associated
!= req
->bss
) {
2813 mutex_unlock(&ifmgd
->mtx
);
2817 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2818 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2820 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2821 ieee80211_set_disassoc(sdata
, false, true);
2823 mutex_unlock(&ifmgd
->mtx
);
2825 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2826 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2827 cookie
, !req
->local_state_change
);
2828 sta_info_flush(sdata
->local
, sdata
);
2830 mutex_lock(&sdata
->local
->mtx
);
2831 ieee80211_recalc_idle(sdata
->local
);
2832 mutex_unlock(&sdata
->local
->mtx
);
2837 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2838 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2841 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2843 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2845 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2847 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2849 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2851 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2852 return sdata
->dev
->operstate
;
2854 EXPORT_SYMBOL(ieee80211_get_operstate
);