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
);
1360 mutex_lock(&local
->mtx
);
1361 ieee80211_recalc_idle(local
);
1362 mutex_unlock(&local
->mtx
);
1364 * must be outside lock due to cfg80211,
1365 * but that's not a problem.
1367 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1368 IEEE80211_STYPE_DEAUTH
,
1369 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1373 void ieee80211_beacon_connection_loss_work(struct work_struct
*work
)
1375 struct ieee80211_sub_if_data
*sdata
=
1376 container_of(work
, struct ieee80211_sub_if_data
,
1377 u
.mgd
.beacon_connection_loss_work
);
1379 if (sdata
->local
->hw
.flags
& IEEE80211_HW_CONNECTION_MONITOR
)
1380 __ieee80211_connection_loss(sdata
);
1382 ieee80211_mgd_probe_ap(sdata
, true);
1385 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1387 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1388 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1390 trace_api_beacon_loss(sdata
);
1392 WARN_ON(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
);
1393 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1395 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1397 void ieee80211_connection_loss(struct ieee80211_vif
*vif
)
1399 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1400 struct ieee80211_hw
*hw
= &sdata
->local
->hw
;
1402 trace_api_connection_loss(sdata
);
1404 WARN_ON(!(hw
->flags
& IEEE80211_HW_CONNECTION_MONITOR
));
1405 ieee80211_queue_work(hw
, &sdata
->u
.mgd
.beacon_connection_loss_work
);
1407 EXPORT_SYMBOL(ieee80211_connection_loss
);
1410 static enum rx_mgmt_action __must_check
1411 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1412 struct ieee80211_mgmt
*mgmt
, size_t len
)
1414 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1415 const u8
*bssid
= NULL
;
1419 return RX_MGMT_NONE
;
1421 ASSERT_MGD_MTX(ifmgd
);
1423 bssid
= ifmgd
->associated
->bssid
;
1425 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1427 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1428 sdata
->name
, bssid
, reason_code
);
1430 ieee80211_set_disassoc(sdata
, true, false);
1431 mutex_lock(&sdata
->local
->mtx
);
1432 ieee80211_recalc_idle(sdata
->local
);
1433 mutex_unlock(&sdata
->local
->mtx
);
1435 return RX_MGMT_CFG80211_DEAUTH
;
1439 static enum rx_mgmt_action __must_check
1440 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1441 struct ieee80211_mgmt
*mgmt
, size_t len
)
1443 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1447 return RX_MGMT_NONE
;
1449 ASSERT_MGD_MTX(ifmgd
);
1451 if (WARN_ON(!ifmgd
->associated
))
1452 return RX_MGMT_NONE
;
1454 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
1455 return RX_MGMT_NONE
;
1457 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1459 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1460 sdata
->name
, mgmt
->sa
, reason_code
);
1462 ieee80211_set_disassoc(sdata
, true, false);
1463 mutex_lock(&sdata
->local
->mtx
);
1464 ieee80211_recalc_idle(sdata
->local
);
1465 mutex_unlock(&sdata
->local
->mtx
);
1466 return RX_MGMT_CFG80211_DISASSOC
;
1470 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1471 struct ieee80211_mgmt
*mgmt
, size_t len
)
1473 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1474 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1475 struct ieee80211_local
*local
= sdata
->local
;
1476 struct ieee80211_supported_band
*sband
;
1477 struct sta_info
*sta
;
1478 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1480 u32 rates
, basic_rates
;
1481 u16 capab_info
, aid
;
1482 struct ieee802_11_elems elems
;
1483 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1486 bool have_higher_than_11mbit
= false;
1487 u16 ap_ht_cap_flags
;
1488 int min_rate
= INT_MAX
, min_rate_index
= -1;
1490 /* AssocResp and ReassocResp have identical structure */
1492 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1493 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1495 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1497 "%s: invalid AID value 0x%x; bits 15:14 not set\n",
1499 aid
&= ~(BIT(15) | BIT(14));
1501 ifmgd
->broken_ap
= false;
1503 if (aid
== 0 || aid
> IEEE80211_MAX_AID
) {
1505 "%s: invalid AID value %d (out of range), turn off PS\n",
1508 ifmgd
->broken_ap
= true;
1511 pos
= mgmt
->u
.assoc_resp
.variable
;
1512 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1514 if (!elems
.supp_rates
) {
1515 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1522 mutex_lock(&sdata
->local
->sta_mtx
);
1524 * station info was already allocated and inserted before
1525 * the association and should be available to us
1527 sta
= sta_info_get_rx(sdata
, cbss
->bssid
);
1528 if (WARN_ON(!sta
)) {
1529 mutex_unlock(&sdata
->local
->sta_mtx
);
1533 set_sta_flag(sta
, WLAN_STA_AUTH
);
1534 set_sta_flag(sta
, WLAN_STA_ASSOC
);
1535 set_sta_flag(sta
, WLAN_STA_ASSOC_AP
);
1536 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1537 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
1541 sband
= local
->hw
.wiphy
->bands
[wk
->chan
->band
];
1543 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1544 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1545 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1548 have_higher_than_11mbit
= true;
1550 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1551 if (sband
->bitrates
[j
].bitrate
== rate
) {
1554 basic_rates
|= BIT(j
);
1555 if (rate
< min_rate
) {
1564 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1565 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1566 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1569 have_higher_than_11mbit
= true;
1571 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1572 if (sband
->bitrates
[j
].bitrate
== rate
) {
1575 basic_rates
|= BIT(j
);
1576 if (rate
< min_rate
) {
1586 * some buggy APs don't advertise basic_rates. use the lowest
1587 * supported rate instead.
1589 if (unlikely(!basic_rates
) && min_rate_index
>= 0) {
1590 printk(KERN_DEBUG
"%s: No basic rates in AssocResp. "
1591 "Using min supported rate instead.\n", sdata
->name
);
1592 basic_rates
= BIT(min_rate_index
);
1595 sta
->sta
.supp_rates
[wk
->chan
->band
] = rates
;
1596 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1598 /* cf. IEEE 802.11 9.2.12 */
1599 if (wk
->chan
->band
== IEEE80211_BAND_2GHZ
&&
1600 have_higher_than_11mbit
)
1601 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1603 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1605 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1606 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1607 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1609 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1611 rate_control_rate_init(sta
);
1613 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1614 set_sta_flag(sta
, WLAN_STA_MFP
);
1616 if (elems
.wmm_param
)
1617 set_sta_flag(sta
, WLAN_STA_WME
);
1619 /* sta_info_reinsert will also unlock the mutex lock */
1620 err
= sta_info_reinsert(sta
);
1623 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1624 " the AP (error %d)\n", sdata
->name
, err
);
1629 * Always handle WMM once after association regardless
1630 * of the first value the AP uses. Setting -1 here has
1631 * that effect because the AP values is an unsigned
1634 ifmgd
->wmm_last_param_set
= -1;
1636 if (elems
.wmm_param
)
1637 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1638 elems
.wmm_param_len
);
1640 ieee80211_set_wmm_default(sdata
);
1642 local
->oper_channel
= wk
->chan
;
1644 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1645 (sdata
->local
->hw
.queues
>= 4) &&
1646 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1647 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1648 cbss
->bssid
, ap_ht_cap_flags
,
1651 /* set AID and assoc capability,
1652 * ieee80211_set_associated() will tell the driver */
1653 bss_conf
->aid
= aid
;
1654 bss_conf
->assoc_capability
= capab_info
;
1655 ieee80211_set_associated(sdata
, cbss
, changed
);
1658 * If we're using 4-addr mode, let the AP know that we're
1659 * doing so, so that it can create the STA VLAN on its side
1661 if (ifmgd
->use_4addr
)
1662 ieee80211_send_4addr_nullfunc(local
, sdata
);
1665 * Start timer to probe the connection to the AP now.
1666 * Also start the timer that will detect beacon loss.
1668 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1669 ieee80211_sta_reset_beacon_monitor(sdata
);
1675 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1676 struct ieee80211_mgmt
*mgmt
,
1678 struct ieee80211_rx_status
*rx_status
,
1679 struct ieee802_11_elems
*elems
,
1682 struct ieee80211_local
*local
= sdata
->local
;
1684 struct ieee80211_bss
*bss
;
1685 struct ieee80211_channel
*channel
;
1686 bool need_ps
= false;
1688 if (sdata
->u
.mgd
.associated
) {
1689 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1690 /* not previously set so we may need to recalc */
1691 need_ps
= !bss
->dtim_period
;
1694 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1695 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0],
1698 freq
= rx_status
->freq
;
1700 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1702 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1705 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1708 ieee80211_rx_bss_put(local
, bss
);
1710 if (!sdata
->u
.mgd
.associated
)
1714 mutex_lock(&local
->iflist_mtx
);
1715 ieee80211_recalc_ps(local
, -1);
1716 mutex_unlock(&local
->iflist_mtx
);
1719 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1720 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1722 struct ieee80211_channel_sw_ie
*sw_elem
=
1723 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1724 ieee80211_sta_process_chanswitch(sdata
, sw_elem
,
1725 bss
, rx_status
->mactime
);
1730 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1731 struct sk_buff
*skb
)
1733 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1734 struct ieee80211_if_managed
*ifmgd
;
1735 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1736 size_t baselen
, len
= skb
->len
;
1737 struct ieee802_11_elems elems
;
1739 ifmgd
= &sdata
->u
.mgd
;
1741 ASSERT_MGD_MTX(ifmgd
);
1743 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1744 return; /* ignore ProbeResp to foreign address */
1746 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1750 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1753 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1755 if (ifmgd
->associated
&&
1756 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0)
1757 ieee80211_reset_ap_probe(sdata
);
1761 * This is the canonical list of information elements we care about,
1762 * the filter code also gives us all changes to the Microsoft OUI
1763 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1765 * We implement beacon filtering in software since that means we can
1766 * avoid processing the frame here and in cfg80211, and userspace
1767 * will not be able to tell whether the hardware supports it or not.
1769 * XXX: This list needs to be dynamic -- userspace needs to be able to
1770 * add items it requires. It also needs to be able to tell us to
1771 * look out for other vendor IEs.
1773 static const u64 care_about_ies
=
1774 (1ULL << WLAN_EID_COUNTRY
) |
1775 (1ULL << WLAN_EID_ERP_INFO
) |
1776 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1777 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1778 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1779 (1ULL << WLAN_EID_HT_INFORMATION
);
1781 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1782 struct ieee80211_mgmt
*mgmt
,
1784 struct ieee80211_rx_status
*rx_status
)
1786 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1787 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1789 struct ieee802_11_elems elems
;
1790 struct ieee80211_local
*local
= sdata
->local
;
1792 bool erp_valid
, directed_tim
= false;
1797 ASSERT_MGD_MTX(ifmgd
);
1799 /* Process beacon from the current BSS */
1800 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1804 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1808 * We might have received a number of frames, among them a
1809 * disassoc frame and a beacon...
1811 if (!ifmgd
->associated
)
1814 bssid
= ifmgd
->associated
->bssid
;
1817 * And in theory even frames from a different AP we were just
1818 * associated to a split-second ago!
1820 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1823 /* Track average RSSI from the Beacon frames of the current AP */
1824 ifmgd
->last_beacon_signal
= rx_status
->signal
;
1825 if (ifmgd
->flags
& IEEE80211_STA_RESET_SIGNAL_AVE
) {
1826 ifmgd
->flags
&= ~IEEE80211_STA_RESET_SIGNAL_AVE
;
1827 ifmgd
->ave_beacon_signal
= rx_status
->signal
* 16;
1828 ifmgd
->last_cqm_event_signal
= 0;
1829 ifmgd
->count_beacon_signal
= 1;
1830 ifmgd
->last_ave_beacon_signal
= 0;
1832 ifmgd
->ave_beacon_signal
=
1833 (IEEE80211_SIGNAL_AVE_WEIGHT
* rx_status
->signal
* 16 +
1834 (16 - IEEE80211_SIGNAL_AVE_WEIGHT
) *
1835 ifmgd
->ave_beacon_signal
) / 16;
1836 ifmgd
->count_beacon_signal
++;
1839 if (ifmgd
->rssi_min_thold
!= ifmgd
->rssi_max_thold
&&
1840 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
) {
1841 int sig
= ifmgd
->ave_beacon_signal
;
1842 int last_sig
= ifmgd
->last_ave_beacon_signal
;
1845 * if signal crosses either of the boundaries, invoke callback
1846 * with appropriate parameters
1848 if (sig
> ifmgd
->rssi_max_thold
&&
1849 (last_sig
<= ifmgd
->rssi_min_thold
|| last_sig
== 0)) {
1850 ifmgd
->last_ave_beacon_signal
= sig
;
1851 drv_rssi_callback(local
, RSSI_EVENT_HIGH
);
1852 } else if (sig
< ifmgd
->rssi_min_thold
&&
1853 (last_sig
>= ifmgd
->rssi_max_thold
||
1855 ifmgd
->last_ave_beacon_signal
= sig
;
1856 drv_rssi_callback(local
, RSSI_EVENT_LOW
);
1860 if (bss_conf
->cqm_rssi_thold
&&
1861 ifmgd
->count_beacon_signal
>= IEEE80211_SIGNAL_AVE_MIN_COUNT
&&
1862 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_CQM_RSSI
)) {
1863 int sig
= ifmgd
->ave_beacon_signal
/ 16;
1864 int last_event
= ifmgd
->last_cqm_event_signal
;
1865 int thold
= bss_conf
->cqm_rssi_thold
;
1866 int hyst
= bss_conf
->cqm_rssi_hyst
;
1868 (last_event
== 0 || sig
< last_event
- hyst
)) {
1869 ifmgd
->last_cqm_event_signal
= sig
;
1870 ieee80211_cqm_rssi_notify(
1872 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
,
1874 } else if (sig
> thold
&&
1875 (last_event
== 0 || sig
> last_event
+ hyst
)) {
1876 ifmgd
->last_cqm_event_signal
= sig
;
1877 ieee80211_cqm_rssi_notify(
1879 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
,
1884 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1885 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1886 if (net_ratelimit()) {
1887 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1888 "to a received beacon\n", sdata
->name
);
1891 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1892 mutex_lock(&local
->iflist_mtx
);
1893 ieee80211_recalc_ps(local
, -1);
1894 mutex_unlock(&local
->iflist_mtx
);
1898 * Push the beacon loss detection into the future since
1899 * we are processing a beacon from the AP just now.
1901 ieee80211_sta_reset_beacon_monitor(sdata
);
1903 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1904 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1905 len
- baselen
, &elems
,
1906 care_about_ies
, ncrc
);
1908 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1909 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1912 if (ncrc
!= ifmgd
->beacon_crc
|| !ifmgd
->beacon_crc_valid
) {
1913 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1916 ieee80211_sta_wmm_params(local
, sdata
, elems
.wmm_param
,
1917 elems
.wmm_param_len
);
1920 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1922 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1923 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1924 ieee80211_hw_config(local
,
1925 IEEE80211_CONF_CHANGE_PS
);
1926 ieee80211_send_nullfunc(local
, sdata
, 0);
1928 local
->pspolling
= true;
1931 * Here is assumed that the driver will be
1932 * able to send ps-poll frame and receive a
1933 * response even though power save mode is
1934 * enabled, but some drivers might require
1935 * to disable power save here. This needs
1936 * to be investigated.
1938 ieee80211_send_pspoll(local
, sdata
);
1943 if (ncrc
== ifmgd
->beacon_crc
&& ifmgd
->beacon_crc_valid
)
1945 ifmgd
->beacon_crc
= ncrc
;
1946 ifmgd
->beacon_crc_valid
= true;
1948 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1950 erp_value
= elems
.erp_info
[0];
1954 changed
|= ieee80211_handle_bss_capability(sdata
,
1955 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1956 erp_valid
, erp_value
);
1959 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1960 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1961 struct sta_info
*sta
;
1962 struct ieee80211_supported_band
*sband
;
1963 u16 ap_ht_cap_flags
;
1967 sta
= sta_info_get(sdata
, bssid
);
1968 if (WARN_ON(!sta
)) {
1973 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1975 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1976 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1978 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1982 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1983 bssid
, ap_ht_cap_flags
, true);
1986 /* Note: country IE parsing is done for us by cfg80211 */
1987 if (elems
.country_elem
) {
1988 /* TODO: IBSS also needs this */
1989 if (elems
.pwr_constr_elem
)
1990 ieee80211_handle_pwr_constr(sdata
,
1991 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1992 elems
.pwr_constr_elem
,
1993 elems
.pwr_constr_elem_len
);
1996 ieee80211_bss_info_change_notify(sdata
, changed
);
1999 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2000 struct sk_buff
*skb
)
2002 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2003 struct ieee80211_rx_status
*rx_status
;
2004 struct ieee80211_mgmt
*mgmt
;
2005 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
2008 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2009 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2010 fc
= le16_to_cpu(mgmt
->frame_control
);
2012 mutex_lock(&ifmgd
->mtx
);
2014 if (ifmgd
->associated
&&
2015 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
2016 switch (fc
& IEEE80211_FCTL_STYPE
) {
2017 case IEEE80211_STYPE_BEACON
:
2018 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
2021 case IEEE80211_STYPE_PROBE_RESP
:
2022 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
2024 case IEEE80211_STYPE_DEAUTH
:
2025 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2027 case IEEE80211_STYPE_DISASSOC
:
2028 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2030 case IEEE80211_STYPE_ACTION
:
2031 switch (mgmt
->u
.action
.category
) {
2032 case WLAN_CATEGORY_SPECTRUM_MGMT
:
2033 ieee80211_sta_process_chanswitch(sdata
,
2034 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
2035 (void *)ifmgd
->associated
->priv
,
2036 rx_status
->mactime
);
2040 mutex_unlock(&ifmgd
->mtx
);
2046 case RX_MGMT_CFG80211_DEAUTH
:
2047 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2049 case RX_MGMT_CFG80211_DISASSOC
:
2050 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2053 WARN(1, "unexpected: %d", rma
);
2058 mutex_unlock(&ifmgd
->mtx
);
2060 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
2061 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
) {
2062 struct ieee80211_local
*local
= sdata
->local
;
2063 struct ieee80211_work
*wk
;
2065 mutex_lock(&local
->mtx
);
2066 list_for_each_entry(wk
, &local
->work_list
, list
) {
2067 if (wk
->sdata
!= sdata
)
2070 if (wk
->type
!= IEEE80211_WORK_ASSOC
&&
2071 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2074 if (memcmp(mgmt
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2076 if (memcmp(mgmt
->sa
, wk
->filter_ta
, ETH_ALEN
))
2080 * Printing the message only here means we can't
2081 * spuriously print it, but it also means that it
2082 * won't be printed when the frame comes in before
2083 * we even tried to associate or in similar cases.
2085 * Ultimately, I suspect cfg80211 should print the
2089 "%s: deauthenticated from %pM (Reason: %u)\n",
2090 sdata
->name
, mgmt
->bssid
,
2091 le16_to_cpu(mgmt
->u
.deauth
.reason_code
));
2093 list_del_rcu(&wk
->list
);
2097 mutex_unlock(&local
->mtx
);
2099 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2103 static void ieee80211_sta_timer(unsigned long data
)
2105 struct ieee80211_sub_if_data
*sdata
=
2106 (struct ieee80211_sub_if_data
*) data
;
2107 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2108 struct ieee80211_local
*local
= sdata
->local
;
2110 if (local
->quiescing
) {
2111 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2115 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
2118 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data
*sdata
,
2119 u8
*bssid
, u8 reason
)
2121 struct ieee80211_local
*local
= sdata
->local
;
2122 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2124 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2125 IEEE80211_STA_BEACON_POLL
);
2127 ieee80211_set_disassoc(sdata
, true, true);
2128 mutex_unlock(&ifmgd
->mtx
);
2129 mutex_lock(&local
->mtx
);
2130 ieee80211_recalc_idle(local
);
2131 mutex_unlock(&local
->mtx
);
2133 * must be outside lock due to cfg80211,
2134 * but that's not a problem.
2136 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2137 IEEE80211_STYPE_DEAUTH
, reason
,
2139 mutex_lock(&ifmgd
->mtx
);
2142 void ieee80211_sta_work(struct ieee80211_sub_if_data
*sdata
)
2144 struct ieee80211_local
*local
= sdata
->local
;
2145 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2147 /* then process the rest of the work */
2148 mutex_lock(&ifmgd
->mtx
);
2150 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2151 IEEE80211_STA_CONNECTION_POLL
) &&
2152 ifmgd
->associated
) {
2156 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
2158 if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
)
2159 max_tries
= max_nullfunc_tries
;
2161 max_tries
= max_probe_tries
;
2163 /* ACK received for nullfunc probing frame */
2164 if (!ifmgd
->probe_send_count
)
2165 ieee80211_reset_ap_probe(sdata
);
2166 else if (ifmgd
->nullfunc_failed
) {
2167 if (ifmgd
->probe_send_count
< max_tries
) {
2168 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2169 wiphy_debug(local
->hw
.wiphy
,
2170 "%s: No ack for nullfunc frame to"
2171 " AP %pM, try %d/%i\n",
2173 ifmgd
->probe_send_count
, max_tries
);
2175 ieee80211_mgd_probe_ap_send(sdata
);
2177 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2178 wiphy_debug(local
->hw
.wiphy
,
2179 "%s: No ack for nullfunc frame to"
2180 " AP %pM, disconnecting.\n",
2181 sdata
->name
, bssid
);
2183 ieee80211_sta_connection_lost(sdata
, bssid
,
2184 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2186 } else if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2187 run_again(ifmgd
, ifmgd
->probe_timeout
);
2188 else if (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) {
2189 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2190 wiphy_debug(local
->hw
.wiphy
,
2191 "%s: Failed to send nullfunc to AP %pM"
2192 " after %dms, disconnecting.\n",
2194 bssid
, probe_wait_ms
);
2196 ieee80211_sta_connection_lost(sdata
, bssid
,
2197 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2198 } else if (ifmgd
->probe_send_count
< max_tries
) {
2199 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2200 wiphy_debug(local
->hw
.wiphy
,
2201 "%s: No probe response from AP %pM"
2202 " after %dms, try %d/%i\n",
2204 bssid
, probe_wait_ms
,
2205 ifmgd
->probe_send_count
, max_tries
);
2207 ieee80211_mgd_probe_ap_send(sdata
);
2210 * We actually lost the connection ... or did we?
2213 wiphy_debug(local
->hw
.wiphy
,
2214 "%s: No probe response from AP %pM"
2215 " after %dms, disconnecting.\n",
2217 bssid
, probe_wait_ms
);
2219 ieee80211_sta_connection_lost(sdata
, bssid
,
2220 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
2224 mutex_unlock(&ifmgd
->mtx
);
2227 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2229 struct ieee80211_sub_if_data
*sdata
=
2230 (struct ieee80211_sub_if_data
*) data
;
2231 struct ieee80211_local
*local
= sdata
->local
;
2233 if (local
->quiescing
)
2236 ieee80211_queue_work(&sdata
->local
->hw
,
2237 &sdata
->u
.mgd
.beacon_connection_loss_work
);
2240 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2242 struct ieee80211_sub_if_data
*sdata
=
2243 (struct ieee80211_sub_if_data
*) data
;
2244 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2245 struct ieee80211_local
*local
= sdata
->local
;
2247 if (local
->quiescing
)
2250 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2253 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2255 struct ieee80211_sub_if_data
*sdata
=
2256 container_of(work
, struct ieee80211_sub_if_data
,
2257 u
.mgd
.monitor_work
);
2259 ieee80211_mgd_probe_ap(sdata
, false);
2262 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2264 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2265 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2266 IEEE80211_STA_CONNECTION_POLL
);
2268 /* let's probe the connection once */
2269 ieee80211_queue_work(&sdata
->local
->hw
,
2270 &sdata
->u
.mgd
.monitor_work
);
2271 /* and do all the other regular work too */
2272 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
2277 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2279 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2282 * we need to use atomic bitops for the running bits
2283 * only because both timers might fire at the same
2284 * time -- the code here is properly synchronised.
2287 cancel_work_sync(&ifmgd
->request_smps_work
);
2289 cancel_work_sync(&ifmgd
->monitor_work
);
2290 cancel_work_sync(&ifmgd
->beacon_connection_loss_work
);
2291 if (del_timer_sync(&ifmgd
->timer
))
2292 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2294 cancel_work_sync(&ifmgd
->chswitch_work
);
2295 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2296 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2298 /* these will just be re-established on connection */
2299 del_timer_sync(&ifmgd
->conn_mon_timer
);
2300 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2303 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2305 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2307 if (!ifmgd
->associated
)
2310 if (sdata
->flags
& IEEE80211_SDATA_DISCONNECT_RESUME
) {
2311 sdata
->flags
&= ~IEEE80211_SDATA_DISCONNECT_RESUME
;
2312 mutex_lock(&ifmgd
->mtx
);
2313 if (ifmgd
->associated
) {
2314 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2315 wiphy_debug(sdata
->local
->hw
.wiphy
,
2316 "%s: driver requested disconnect after resume.\n",
2319 ieee80211_sta_connection_lost(sdata
,
2320 ifmgd
->associated
->bssid
,
2321 WLAN_REASON_UNSPECIFIED
);
2322 mutex_unlock(&ifmgd
->mtx
);
2325 mutex_unlock(&ifmgd
->mtx
);
2328 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2329 add_timer(&ifmgd
->timer
);
2330 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2331 add_timer(&ifmgd
->chswitch_timer
);
2332 ieee80211_sta_reset_beacon_monitor(sdata
);
2333 ieee80211_restart_sta_timer(sdata
);
2334 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.monitor_work
);
2338 /* interface setup */
2339 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2341 struct ieee80211_if_managed
*ifmgd
;
2343 ifmgd
= &sdata
->u
.mgd
;
2344 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2345 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2346 INIT_WORK(&ifmgd
->beacon_connection_loss_work
,
2347 ieee80211_beacon_connection_loss_work
);
2348 INIT_WORK(&ifmgd
->request_smps_work
, ieee80211_request_smps_work
);
2349 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2350 (unsigned long) sdata
);
2351 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2352 (unsigned long) sdata
);
2353 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2354 (unsigned long) sdata
);
2355 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2356 (unsigned long) sdata
);
2360 mutex_init(&ifmgd
->mtx
);
2362 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
2363 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
2365 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
2368 /* scan finished notification */
2369 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2371 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2373 /* Restart STA timers */
2375 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2376 ieee80211_restart_sta_timer(sdata
);
2380 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2381 unsigned long data
, void *dummy
)
2383 s32 latency_usec
= (s32
) data
;
2384 struct ieee80211_local
*local
=
2385 container_of(nb
, struct ieee80211_local
,
2386 network_latency_notifier
);
2388 mutex_lock(&local
->iflist_mtx
);
2389 ieee80211_recalc_ps(local
, latency_usec
);
2390 mutex_unlock(&local
->iflist_mtx
);
2396 static enum work_done_result
2397 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
2398 struct sk_buff
*skb
)
2400 struct ieee80211_local
*local
= wk
->sdata
->local
;
2403 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2407 if (wk
->type
== IEEE80211_WORK_AUTH
) {
2408 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2412 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2413 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
2414 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2416 wk
->type
= IEEE80211_WORK_AUTH
;
2417 wk
->probe_auth
.tries
= 0;
2418 return WORK_DONE_REQUEUE
;
2420 if (wk
->probe_auth
.synced
)
2421 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2422 IEEE80211_TX_SYNC_AUTH
);
2424 return WORK_DONE_DESTROY
;
2427 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2428 struct cfg80211_auth_request
*req
)
2431 struct ieee80211_work
*wk
;
2434 if (req
->local_state_change
)
2435 return 0; /* no need to update mac80211 state */
2437 switch (req
->auth_type
) {
2438 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2439 auth_alg
= WLAN_AUTH_OPEN
;
2441 case NL80211_AUTHTYPE_SHARED_KEY
:
2442 if (IS_ERR(sdata
->local
->wep_tx_tfm
))
2444 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2446 case NL80211_AUTHTYPE_FT
:
2447 auth_alg
= WLAN_AUTH_FT
;
2449 case NL80211_AUTHTYPE_NETWORK_EAP
:
2450 auth_alg
= WLAN_AUTH_LEAP
;
2456 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2460 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2462 if (req
->ie
&& req
->ie_len
) {
2463 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2464 wk
->ie_len
= req
->ie_len
;
2467 if (req
->key
&& req
->key_len
) {
2468 wk
->probe_auth
.key_len
= req
->key_len
;
2469 wk
->probe_auth
.key_idx
= req
->key_idx
;
2470 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
2473 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2474 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
2475 wk
->probe_auth
.ssid_len
= ssid
[1];
2477 wk
->probe_auth
.algorithm
= auth_alg
;
2478 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
2480 /* if we already have a probe, don't probe again */
2481 if (req
->bss
->proberesp_ies
)
2482 wk
->type
= IEEE80211_WORK_AUTH
;
2484 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
2485 wk
->chan
= req
->bss
->channel
;
2486 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2488 wk
->done
= ieee80211_probe_auth_done
;
2490 ieee80211_add_work(wk
);
2494 /* create and insert a dummy station entry */
2495 static int ieee80211_pre_assoc(struct ieee80211_sub_if_data
*sdata
,
2497 struct sta_info
*sta
;
2500 sta
= sta_info_alloc(sdata
, bssid
, GFP_KERNEL
);
2506 err
= sta_info_insert(sta
);
2509 printk(KERN_DEBUG
"%s: failed to insert Dummy STA entry for"
2510 " the AP (error %d)\n", sdata
->name
, err
);
2517 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
2518 struct sk_buff
*skb
)
2520 struct ieee80211_local
*local
= wk
->sdata
->local
;
2521 struct ieee80211_mgmt
*mgmt
;
2522 struct ieee80211_rx_status
*rx_status
;
2523 struct ieee802_11_elems elems
;
2524 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
2528 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2529 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
2533 if (wk
->type
== IEEE80211_WORK_ASSOC_BEACON_WAIT
) {
2534 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2535 rx_status
= (void *) skb
->cb
;
2536 ieee802_11_parse_elems(skb
->data
+ 24 + 12, skb
->len
- 24 - 12, &elems
);
2537 ieee80211_rx_bss_info(wk
->sdata
, (void *)skb
->data
, skb
->len
, rx_status
,
2539 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2541 wk
->type
= IEEE80211_WORK_ASSOC
;
2542 /* not really done yet */
2543 return WORK_DONE_REQUEUE
;
2546 mgmt
= (void *)skb
->data
;
2547 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
2549 if (status
== WLAN_STATUS_SUCCESS
) {
2550 if (wk
->assoc
.synced
)
2551 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2552 IEEE80211_TX_SYNC_ASSOC
);
2554 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
2555 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
2556 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2557 /* oops -- internal error -- send timeout for now */
2558 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2559 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
2561 return WORK_DONE_DESTROY
;
2564 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
2566 /* assoc failed - destroy the dummy station entry */
2567 sta_info_destroy_addr(wk
->sdata
, cbss
->bssid
);
2570 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
2572 if (wk
->assoc
.synced
)
2573 drv_finish_tx_sync(local
, wk
->sdata
, wk
->filter_ta
,
2574 IEEE80211_TX_SYNC_ASSOC
);
2576 return WORK_DONE_DESTROY
;
2579 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2580 struct cfg80211_assoc_request
*req
)
2582 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2583 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
2584 struct ieee80211_work
*wk
;
2588 mutex_lock(&ifmgd
->mtx
);
2589 if (ifmgd
->associated
) {
2590 if (!req
->prev_bssid
||
2591 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
2594 * We are already associated and the request was not a
2595 * reassociation request from the current BSS, so
2598 mutex_unlock(&ifmgd
->mtx
);
2602 /* Trying to reassociate - clear previous association state */
2603 ieee80211_set_disassoc(sdata
, true, false);
2605 mutex_unlock(&ifmgd
->mtx
);
2607 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2612 * create a dummy station info entry in order
2613 * to start accepting incoming EAPOL packets from the station
2615 err
= ieee80211_pre_assoc(sdata
, req
->bss
->bssid
);
2621 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2622 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
2624 ifmgd
->beacon_crc_valid
= false;
2626 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2627 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2628 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2629 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2630 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2633 if (req
->ie
&& req
->ie_len
) {
2634 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2635 wk
->ie_len
= req
->ie_len
;
2639 wk
->assoc
.bss
= req
->bss
;
2641 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
2643 /* new association always uses requested smps mode */
2644 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
2645 if (ifmgd
->powersave
)
2646 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
2648 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
2650 ifmgd
->ap_smps
= ifmgd
->req_smps
;
2652 wk
->assoc
.smps
= ifmgd
->ap_smps
;
2654 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2655 * We still associate in non-HT mode (11a/b/g) if any one of these
2656 * ciphers is configured as pairwise.
2657 * We can set this to true for non-11n hardware, that'll be checked
2658 * separately along with the peer capabilities.
2660 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
2661 wk
->assoc
.capability
= req
->bss
->capability
;
2662 wk
->assoc
.wmm_used
= bss
->wmm_used
;
2663 wk
->assoc
.supp_rates
= bss
->supp_rates
;
2664 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
2665 wk
->assoc
.ht_information_ie
=
2666 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
2668 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
2669 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
2670 wk
->assoc
.uapsd_used
= true;
2671 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
2673 wk
->assoc
.uapsd_used
= false;
2674 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
2677 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2678 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
2679 wk
->assoc
.ssid_len
= ssid
[1];
2681 if (req
->prev_bssid
)
2682 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2684 wk
->chan
= req
->bss
->channel
;
2685 wk
->chan_type
= NL80211_CHAN_NO_HT
;
2687 wk
->done
= ieee80211_assoc_done
;
2688 if (!bss
->dtim_period
&&
2689 sdata
->local
->hw
.flags
& IEEE80211_HW_NEED_DTIM_PERIOD
)
2690 wk
->type
= IEEE80211_WORK_ASSOC_BEACON_WAIT
;
2692 wk
->type
= IEEE80211_WORK_ASSOC
;
2695 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2696 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2698 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2699 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2702 if (req
->crypto
.control_port
)
2703 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2705 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2707 sdata
->control_port_protocol
= req
->crypto
.control_port_ethertype
;
2708 sdata
->control_port_no_encrypt
= req
->crypto
.control_port_no_encrypt
;
2710 ieee80211_add_work(wk
);
2714 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2715 struct cfg80211_deauth_request
*req
,
2718 struct ieee80211_local
*local
= sdata
->local
;
2719 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2720 struct ieee80211_work
*wk
;
2722 bool assoc_bss
= false;
2724 mutex_lock(&ifmgd
->mtx
);
2726 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2727 if (ifmgd
->associated
== req
->bss
) {
2728 ieee80211_set_disassoc(sdata
, false, true);
2729 mutex_unlock(&ifmgd
->mtx
);
2732 bool not_auth_yet
= false;
2734 mutex_unlock(&ifmgd
->mtx
);
2736 mutex_lock(&local
->mtx
);
2737 list_for_each_entry(wk
, &local
->work_list
, list
) {
2738 if (wk
->sdata
!= sdata
)
2741 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2742 wk
->type
!= IEEE80211_WORK_AUTH
&&
2743 wk
->type
!= IEEE80211_WORK_ASSOC
&&
2744 wk
->type
!= IEEE80211_WORK_ASSOC_BEACON_WAIT
)
2747 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2750 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2751 list_del_rcu(&wk
->list
);
2755 mutex_unlock(&local
->mtx
);
2758 * If somebody requests authentication and we haven't
2759 * sent out an auth frame yet there's no need to send
2760 * out a deauth frame either. If the state was PROBE,
2761 * then this is the case. If it's AUTH we have sent a
2762 * frame, and if it's IDLE we have completed the auth
2766 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2771 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2772 sdata
->name
, bssid
, req
->reason_code
);
2774 ieee80211_send_deauth_disassoc(sdata
, bssid
, IEEE80211_STYPE_DEAUTH
,
2775 req
->reason_code
, cookie
,
2776 !req
->local_state_change
);
2778 sta_info_flush(sdata
->local
, sdata
);
2780 mutex_lock(&sdata
->local
->mtx
);
2781 ieee80211_recalc_idle(sdata
->local
);
2782 mutex_unlock(&sdata
->local
->mtx
);
2787 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2788 struct cfg80211_disassoc_request
*req
,
2791 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2794 mutex_lock(&ifmgd
->mtx
);
2797 * cfg80211 should catch this ... but it's racy since
2798 * we can receive a disassoc frame, process it, hand it
2799 * to cfg80211 while that's in a locked section already
2800 * trying to tell us that the user wants to disconnect.
2802 if (ifmgd
->associated
!= req
->bss
) {
2803 mutex_unlock(&ifmgd
->mtx
);
2807 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2808 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2810 memcpy(bssid
, req
->bss
->bssid
, ETH_ALEN
);
2811 ieee80211_set_disassoc(sdata
, false, true);
2813 mutex_unlock(&ifmgd
->mtx
);
2815 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2816 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2817 cookie
, !req
->local_state_change
);
2818 sta_info_flush(sdata
->local
, sdata
);
2820 mutex_lock(&sdata
->local
->mtx
);
2821 ieee80211_recalc_idle(sdata
->local
);
2822 mutex_unlock(&sdata
->local
->mtx
);
2827 void ieee80211_cqm_rssi_notify(struct ieee80211_vif
*vif
,
2828 enum nl80211_cqm_rssi_threshold_event rssi_event
,
2831 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2833 trace_api_cqm_rssi_notify(sdata
, rssi_event
);
2835 cfg80211_cqm_rssi_notify(sdata
->dev
, rssi_event
, gfp
);
2837 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify
);
2839 unsigned char ieee80211_get_operstate(struct ieee80211_vif
*vif
)
2841 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
2842 return sdata
->dev
->operstate
;
2844 EXPORT_SYMBOL(ieee80211_get_operstate
);