2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/pm_qos_params.h>
21 #include <linux/crc32.h>
22 #include <net/mac80211.h>
23 #include <asm/unaligned.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
30 #define IEEE80211_MAX_PROBE_TRIES 5
33 * beacon loss detection timeout
34 * XXX: should depend on beacon interval
36 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
38 * Time the connection can be idle before we probe
39 * it to see if we can still talk to the AP.
41 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
43 * Time we wait for a probe response after sending
44 * a probe request because of beacon loss or for
45 * checking the connection still works.
47 #define IEEE80211_PROBE_WAIT (HZ / 2)
49 #define TMR_RUNNING_TIMER 0
50 #define TMR_RUNNING_CHANSW 1
53 * All cfg80211 functions have to be called outside a locked
54 * section so that they can acquire a lock themselves... This
55 * is much simpler than queuing up things in cfg80211, but we
56 * do need some indirection for that here.
59 /* no action required */
62 /* caller must call cfg80211_send_rx_auth() */
63 RX_MGMT_CFG80211_AUTH
,
65 /* caller must call cfg80211_send_rx_assoc() */
66 RX_MGMT_CFG80211_ASSOC
,
68 /* caller must call cfg80211_send_deauth() */
69 RX_MGMT_CFG80211_DEAUTH
,
71 /* caller must call cfg80211_send_disassoc() */
72 RX_MGMT_CFG80211_DISASSOC
,
74 /* caller must tell cfg80211 about internal error */
75 RX_MGMT_CFG80211_ASSOC_ERROR
,
79 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
81 WARN_ON(!mutex_is_locked(&ifmgd
->mtx
));
85 * We can have multiple work items (and connection probing)
86 * scheduling this timer, but we need to take care to only
87 * reschedule it when it should fire _earlier_ than it was
88 * asked for before, or if it's not pending right now. This
89 * function ensures that. Note that it then is required to
90 * run this function for all timeouts after the first one
91 * has happened -- the work that runs from this timer will
94 static void run_again(struct ieee80211_if_managed
*ifmgd
,
95 unsigned long timeout
)
97 ASSERT_MGD_MTX(ifmgd
);
99 if (!timer_pending(&ifmgd
->timer
) ||
100 time_before(timeout
, ifmgd
->timer
.expires
))
101 mod_timer(&ifmgd
->timer
, timeout
);
104 static void mod_beacon_timer(struct ieee80211_sub_if_data
*sdata
)
106 if (sdata
->local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
)
109 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
110 round_jiffies_up(jiffies
+ IEEE80211_BEACON_LOSS_TIME
));
113 static int ecw2cw(int ecw
)
115 return (1 << ecw
) - 1;
119 * ieee80211_enable_ht should be called only after the operating band
120 * has been determined as ht configuration depends on the hw's
121 * HT abilities for a specific band.
123 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
124 struct ieee80211_ht_info
*hti
,
125 const u8
*bssid
, u16 ap_ht_cap_flags
)
127 struct ieee80211_local
*local
= sdata
->local
;
128 struct ieee80211_supported_band
*sband
;
129 struct sta_info
*sta
;
132 bool enable_ht
= true, ht_changed
;
133 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
135 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
137 /* HT is not supported */
138 if (!sband
->ht_cap
.ht_supported
)
141 /* check that channel matches the right operating channel */
142 if (local
->hw
.conf
.channel
->center_freq
!=
143 ieee80211_channel_to_frequency(hti
->control_chan
))
147 channel_type
= NL80211_CHAN_HT20
;
149 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
150 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
151 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
152 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
153 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
154 if (!(local
->hw
.conf
.channel
->flags
&
155 IEEE80211_CHAN_NO_HT40PLUS
))
156 channel_type
= NL80211_CHAN_HT40PLUS
;
158 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
159 if (!(local
->hw
.conf
.channel
->flags
&
160 IEEE80211_CHAN_NO_HT40MINUS
))
161 channel_type
= NL80211_CHAN_HT40MINUS
;
167 ht_changed
= conf_is_ht(&local
->hw
.conf
) != enable_ht
||
168 channel_type
!= local
->hw
.conf
.channel_type
;
170 local
->oper_channel_type
= channel_type
;
173 /* channel_type change automatically detected */
174 ieee80211_hw_config(local
, 0);
177 sta
= sta_info_get(sdata
, bssid
);
179 rate_control_rate_update(local
, sband
, sta
,
180 IEEE80211_RC_HT_CHANGED
,
181 local
->oper_channel_type
);
189 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
191 /* if bss configuration changed store the new one */
192 if (!sdata
->ht_opmode_valid
||
193 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
194 changed
|= BSS_CHANGED_HT
;
195 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
196 sdata
->ht_opmode_valid
= true;
202 /* frame sending functions */
204 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
205 const u8
*bssid
, u16 stype
, u16 reason
,
208 struct ieee80211_local
*local
= sdata
->local
;
209 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
211 struct ieee80211_mgmt
*mgmt
;
213 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
215 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
216 "deauth/disassoc frame\n", sdata
->name
);
219 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
221 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
223 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
224 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
225 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
226 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
228 /* u.deauth.reason_code == u.disassoc.reason_code */
229 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
231 if (stype
== IEEE80211_STYPE_DEAUTH
)
233 __cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
235 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
238 __cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
240 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
241 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
242 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
243 ieee80211_tx_skb(sdata
, skb
);
246 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
247 struct ieee80211_sub_if_data
*sdata
)
249 struct ieee80211_pspoll
*pspoll
;
252 skb
= ieee80211_pspoll_get(&local
->hw
, &sdata
->vif
);
256 pspoll
= (struct ieee80211_pspoll
*) skb
->data
;
257 pspoll
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
259 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
260 ieee80211_tx_skb(sdata
, skb
);
263 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
264 struct ieee80211_sub_if_data
*sdata
,
268 struct ieee80211_hdr_3addr
*nullfunc
;
270 skb
= ieee80211_nullfunc_get(&local
->hw
, &sdata
->vif
);
274 nullfunc
= (struct ieee80211_hdr_3addr
*) skb
->data
;
276 nullfunc
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PM
);
278 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
279 ieee80211_tx_skb(sdata
, skb
);
282 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local
*local
,
283 struct ieee80211_sub_if_data
*sdata
)
286 struct ieee80211_hdr
*nullfunc
;
289 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
292 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 30);
294 printk(KERN_DEBUG
"%s: failed to allocate buffer for 4addr "
295 "nullfunc frame\n", sdata
->name
);
298 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
300 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 30);
301 memset(nullfunc
, 0, 30);
302 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
303 IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
304 nullfunc
->frame_control
= fc
;
305 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
306 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
307 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
308 memcpy(nullfunc
->addr4
, sdata
->vif
.addr
, ETH_ALEN
);
310 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
311 ieee80211_tx_skb(sdata
, skb
);
314 /* spectrum management related things */
315 static void ieee80211_chswitch_work(struct work_struct
*work
)
317 struct ieee80211_sub_if_data
*sdata
=
318 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
319 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
321 if (!ieee80211_sdata_running(sdata
))
324 mutex_lock(&ifmgd
->mtx
);
325 if (!ifmgd
->associated
)
328 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
329 ieee80211_hw_config(sdata
->local
, IEEE80211_CONF_CHANGE_CHANNEL
);
331 /* XXX: shouldn't really modify cfg80211-owned data! */
332 ifmgd
->associated
->channel
= sdata
->local
->oper_channel
;
334 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
335 IEEE80211_QUEUE_STOP_REASON_CSA
);
337 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
338 mutex_unlock(&ifmgd
->mtx
);
341 static void ieee80211_chswitch_timer(unsigned long data
)
343 struct ieee80211_sub_if_data
*sdata
=
344 (struct ieee80211_sub_if_data
*) data
;
345 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
347 if (sdata
->local
->quiescing
) {
348 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
352 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
355 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
356 struct ieee80211_channel_sw_ie
*sw_elem
,
357 struct ieee80211_bss
*bss
)
359 struct cfg80211_bss
*cbss
=
360 container_of((void *)bss
, struct cfg80211_bss
, priv
);
361 struct ieee80211_channel
*new_ch
;
362 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
363 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
);
365 ASSERT_MGD_MTX(ifmgd
);
367 if (!ifmgd
->associated
)
370 if (sdata
->local
->scanning
)
373 /* Disregard subsequent beacons if we are already running a timer
376 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
379 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
380 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
383 sdata
->local
->csa_channel
= new_ch
;
385 if (sw_elem
->count
<= 1) {
386 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
388 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
389 IEEE80211_QUEUE_STOP_REASON_CSA
);
390 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
391 mod_timer(&ifmgd
->chswitch_timer
,
393 msecs_to_jiffies(sw_elem
->count
*
394 cbss
->beacon_interval
));
398 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
399 u16 capab_info
, u8
*pwr_constr_elem
,
400 u8 pwr_constr_elem_len
)
402 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
404 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
407 /* Power constraint IE length should be 1 octet */
408 if (pwr_constr_elem_len
!= 1)
411 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
412 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
413 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
414 ieee80211_hw_config(sdata
->local
, 0);
419 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
420 struct ieee80211_sub_if_data
*sdata
)
422 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
425 * If we are scanning right now then the parameters will
426 * take effect when scan finishes.
431 if (conf
->dynamic_ps_timeout
> 0 &&
432 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
433 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
434 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
436 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
437 ieee80211_send_nullfunc(local
, sdata
, 1);
439 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
440 (local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
))
443 conf
->flags
|= IEEE80211_CONF_PS
;
444 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
448 static void ieee80211_change_ps(struct ieee80211_local
*local
)
450 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
452 if (local
->ps_sdata
) {
453 ieee80211_enable_ps(local
, local
->ps_sdata
);
454 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
455 conf
->flags
&= ~IEEE80211_CONF_PS
;
456 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
457 del_timer_sync(&local
->dynamic_ps_timer
);
458 cancel_work_sync(&local
->dynamic_ps_enable_work
);
462 /* need to hold RTNL or interface lock */
463 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
465 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
468 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
469 local
->ps_sdata
= NULL
;
473 if (!list_empty(&local
->work_list
)) {
474 local
->ps_sdata
= NULL
;
478 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
479 if (!ieee80211_sdata_running(sdata
))
481 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
487 if (count
== 1 && found
->u
.mgd
.powersave
&&
488 found
->u
.mgd
.associated
&&
489 found
->u
.mgd
.associated
->beacon_ies
&&
490 !(found
->u
.mgd
.flags
& (IEEE80211_STA_BEACON_POLL
|
491 IEEE80211_STA_CONNECTION_POLL
))) {
495 latency
= pm_qos_requirement(PM_QOS_NETWORK_LATENCY
);
497 beaconint_us
= ieee80211_tu_to_usec(
498 found
->vif
.bss_conf
.beacon_int
);
500 if (beaconint_us
> latency
) {
501 local
->ps_sdata
= NULL
;
503 struct ieee80211_bss
*bss
;
507 bss
= (void *)found
->u
.mgd
.associated
->priv
;
508 dtimper
= bss
->dtim_period
;
510 /* If the TIM IE is invalid, pretend the value is 1 */
513 else if (dtimper
> 1)
514 maxslp
= min_t(int, dtimper
,
515 latency
/ beaconint_us
);
517 local
->hw
.conf
.max_sleep_period
= maxslp
;
518 local
->hw
.conf
.ps_dtim_period
= dtimper
;
519 local
->ps_sdata
= found
;
522 local
->ps_sdata
= NULL
;
526 ieee80211_change_ps(local
);
529 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
531 struct ieee80211_local
*local
=
532 container_of(work
, struct ieee80211_local
,
533 dynamic_ps_disable_work
);
535 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
536 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
537 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
540 ieee80211_wake_queues_by_reason(&local
->hw
,
541 IEEE80211_QUEUE_STOP_REASON_PS
);
544 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
546 struct ieee80211_local
*local
=
547 container_of(work
, struct ieee80211_local
,
548 dynamic_ps_enable_work
);
549 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
550 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
552 /* can only happen when PS was just disabled anyway */
556 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
559 if ((local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) &&
560 (!(ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)))
561 ieee80211_send_nullfunc(local
, sdata
, 1);
563 if (!((local
->hw
.flags
& IEEE80211_HW_REPORTS_TX_ACK_STATUS
) &&
564 (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)) ||
565 (ifmgd
->flags
& IEEE80211_STA_NULLFUNC_ACKED
)) {
566 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
567 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
568 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
572 void ieee80211_dynamic_ps_timer(unsigned long data
)
574 struct ieee80211_local
*local
= (void *) data
;
576 if (local
->quiescing
|| local
->suspended
)
579 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
583 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
584 struct ieee80211_if_managed
*ifmgd
,
585 u8
*wmm_param
, size_t wmm_param_len
)
587 struct ieee80211_tx_queue_params params
;
590 u8
*pos
, uapsd_queues
= 0;
592 if (local
->hw
.queues
< 4)
598 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
601 if (ifmgd
->flags
& IEEE80211_STA_UAPSD_ENABLED
)
602 uapsd_queues
= local
->uapsd_queues
;
604 count
= wmm_param
[6] & 0x0f;
605 if (count
== ifmgd
->wmm_last_param_set
)
607 ifmgd
->wmm_last_param_set
= count
;
610 left
= wmm_param_len
- 8;
612 memset(¶ms
, 0, sizeof(params
));
615 for (; left
>= 4; left
-= 4, pos
+= 4) {
616 int aci
= (pos
[0] >> 5) & 0x03;
617 int acm
= (pos
[0] >> 4) & 0x01;
625 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
626 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
)
632 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
633 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VI
)
639 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
640 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_VO
)
647 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
648 if (uapsd_queues
& IEEE80211_WMM_IE_STA_QOSINFO_AC_BE
)
653 params
.aifs
= pos
[0] & 0x0f;
654 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
655 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
656 params
.txop
= get_unaligned_le16(pos
+ 2);
657 params
.uapsd
= uapsd
;
659 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
660 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
661 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
662 wiphy_name(local
->hw
.wiphy
), queue
, aci
, acm
,
663 params
.aifs
, params
.cw_min
, params
.cw_max
, params
.txop
,
666 if (drv_conf_tx(local
, queue
, ¶ms
) && local
->ops
->conf_tx
)
667 printk(KERN_DEBUG
"%s: failed to set TX queue "
668 "parameters for queue %d\n",
669 wiphy_name(local
->hw
.wiphy
), queue
);
673 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
674 u16 capab
, bool erp_valid
, u8 erp
)
676 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
679 bool use_short_preamble
;
683 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
684 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
686 use_protection
= false;
687 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
690 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
691 if (sdata
->local
->hw
.conf
.channel
->band
== IEEE80211_BAND_5GHZ
)
692 use_short_slot
= true;
694 if (use_protection
!= bss_conf
->use_cts_prot
) {
695 bss_conf
->use_cts_prot
= use_protection
;
696 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
699 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
700 bss_conf
->use_short_preamble
= use_short_preamble
;
701 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
704 if (use_short_slot
!= bss_conf
->use_short_slot
) {
705 bss_conf
->use_short_slot
= use_short_slot
;
706 changed
|= BSS_CHANGED_ERP_SLOT
;
712 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
713 struct cfg80211_bss
*cbss
,
714 u32 bss_info_changed
)
716 struct ieee80211_bss
*bss
= (void *)cbss
->priv
;
717 struct ieee80211_local
*local
= sdata
->local
;
719 bss_info_changed
|= BSS_CHANGED_ASSOC
;
720 /* set timing information */
721 sdata
->vif
.bss_conf
.beacon_int
= cbss
->beacon_interval
;
722 sdata
->vif
.bss_conf
.timestamp
= cbss
->tsf
;
724 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
725 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
726 cbss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
728 sdata
->u
.mgd
.associated
= cbss
;
729 memcpy(sdata
->u
.mgd
.bssid
, cbss
->bssid
, ETH_ALEN
);
731 /* just to be sure */
732 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
733 IEEE80211_STA_BEACON_POLL
);
736 * Always handle WMM once after association regardless
737 * of the first value the AP uses. Setting -1 here has
738 * that effect because the AP values is an unsigned
741 sdata
->u
.mgd
.wmm_last_param_set
= -1;
743 ieee80211_led_assoc(local
, 1);
745 sdata
->vif
.bss_conf
.assoc
= 1;
747 * For now just always ask the driver to update the basic rateset
748 * when we have associated, we aren't checking whether it actually
751 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
753 /* And the BSSID changed - we're associated now */
754 bss_info_changed
|= BSS_CHANGED_BSSID
;
756 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
758 mutex_lock(&local
->iflist_mtx
);
759 ieee80211_recalc_ps(local
, -1);
760 ieee80211_recalc_smps(local
, sdata
);
761 mutex_unlock(&local
->iflist_mtx
);
763 netif_tx_start_all_queues(sdata
->dev
);
764 netif_carrier_on(sdata
->dev
);
767 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
)
769 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
770 struct ieee80211_local
*local
= sdata
->local
;
771 struct sta_info
*sta
;
772 u32 changed
= 0, config_changed
= 0;
775 ASSERT_MGD_MTX(ifmgd
);
777 if (WARN_ON(!ifmgd
->associated
))
780 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
782 ifmgd
->associated
= NULL
;
783 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
786 * we need to commit the associated = NULL change because the
787 * scan code uses that to determine whether this iface should
788 * go to/wake up from powersave or not -- and could otherwise
789 * wake the queues erroneously.
794 * Thus, we can only afterwards stop the queues -- to account
795 * for the case where another CPU is finishing a scan at this
796 * time -- we don't want the scan code to enable queues.
799 netif_tx_stop_all_queues(sdata
->dev
);
800 netif_carrier_off(sdata
->dev
);
803 sta
= sta_info_get(sdata
, bssid
);
805 set_sta_flags(sta
, WLAN_STA_DISASSOC
);
806 ieee80211_sta_tear_down_BA_sessions(sta
);
810 changed
|= ieee80211_reset_erp_info(sdata
);
812 ieee80211_led_assoc(local
, 0);
813 changed
|= BSS_CHANGED_ASSOC
;
814 sdata
->vif
.bss_conf
.assoc
= false;
816 ieee80211_set_wmm_default(sdata
);
818 /* channel(_type) changes are handled by ieee80211_hw_config */
819 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
821 /* on the next assoc, re-program HT parameters */
822 sdata
->ht_opmode_valid
= false;
824 local
->power_constr_level
= 0;
826 del_timer_sync(&local
->dynamic_ps_timer
);
827 cancel_work_sync(&local
->dynamic_ps_enable_work
);
829 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
830 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
831 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
834 ieee80211_hw_config(local
, config_changed
);
836 /* And the BSSID changed -- not very interesting here */
837 changed
|= BSS_CHANGED_BSSID
;
838 ieee80211_bss_info_change_notify(sdata
, changed
);
840 sta_info_destroy_addr(sdata
, bssid
);
843 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
844 struct ieee80211_hdr
*hdr
)
847 * We can postpone the mgd.timer whenever receiving unicast frames
848 * from AP because we know that the connection is working both ways
849 * at that time. But multicast frames (and hence also beacons) must
850 * be ignored here, because we need to trigger the timer during
851 * data idle periods for sending the periodic probe request to the
852 * AP we're connected to.
854 if (is_multicast_ether_addr(hdr
->addr1
))
857 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
858 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
861 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
863 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
866 ssid
= ieee80211_bss_get_ie(ifmgd
->associated
, WLAN_EID_SSID
);
867 ieee80211_send_probe_req(sdata
, ifmgd
->associated
->bssid
,
868 ssid
+ 2, ssid
[1], NULL
, 0);
870 ifmgd
->probe_send_count
++;
871 ifmgd
->probe_timeout
= jiffies
+ IEEE80211_PROBE_WAIT
;
872 run_again(ifmgd
, ifmgd
->probe_timeout
);
875 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
878 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
879 bool already
= false;
881 if (!ieee80211_sdata_running(sdata
))
884 if (sdata
->local
->scanning
)
887 if (sdata
->local
->tmp_channel
)
890 mutex_lock(&ifmgd
->mtx
);
892 if (!ifmgd
->associated
)
895 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
896 if (beacon
&& net_ratelimit())
897 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
898 "- sending probe request\n", sdata
->name
);
902 * The driver/our work has already reported this event or the
903 * connection monitoring has kicked in and we have already sent
904 * a probe request. Or maybe the AP died and the driver keeps
905 * reporting until we disassociate...
907 * In either case we have to ignore the current call to this
908 * function (except for setting the correct probe reason bit)
909 * because otherwise we would reset the timer every time and
910 * never check whether we received a probe response!
912 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
913 IEEE80211_STA_CONNECTION_POLL
))
917 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
919 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
924 mutex_lock(&sdata
->local
->iflist_mtx
);
925 ieee80211_recalc_ps(sdata
->local
, -1);
926 mutex_unlock(&sdata
->local
->iflist_mtx
);
928 ifmgd
->probe_send_count
= 0;
929 ieee80211_mgd_probe_ap_send(sdata
);
931 mutex_unlock(&ifmgd
->mtx
);
934 void ieee80211_beacon_loss_work(struct work_struct
*work
)
936 struct ieee80211_sub_if_data
*sdata
=
937 container_of(work
, struct ieee80211_sub_if_data
,
938 u
.mgd
.beacon_loss_work
);
940 ieee80211_mgd_probe_ap(sdata
, true);
943 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
945 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
947 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.beacon_loss_work
);
949 EXPORT_SYMBOL(ieee80211_beacon_loss
);
951 static enum rx_mgmt_action __must_check
952 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
953 struct ieee80211_mgmt
*mgmt
, size_t len
)
955 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
956 const u8
*bssid
= NULL
;
962 ASSERT_MGD_MTX(ifmgd
);
964 bssid
= ifmgd
->associated
->bssid
;
966 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
968 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
969 sdata
->name
, bssid
, reason_code
);
971 ieee80211_set_disassoc(sdata
);
972 ieee80211_recalc_idle(sdata
->local
);
974 return RX_MGMT_CFG80211_DEAUTH
;
978 static enum rx_mgmt_action __must_check
979 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
980 struct ieee80211_mgmt
*mgmt
, size_t len
)
982 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
988 ASSERT_MGD_MTX(ifmgd
);
990 if (WARN_ON(!ifmgd
->associated
))
993 if (WARN_ON(memcmp(ifmgd
->associated
->bssid
, mgmt
->sa
, ETH_ALEN
)))
996 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
998 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
999 sdata
->name
, mgmt
->sa
, reason_code
);
1001 ieee80211_set_disassoc(sdata
);
1002 ieee80211_recalc_idle(sdata
->local
);
1003 return RX_MGMT_CFG80211_DISASSOC
;
1007 static bool ieee80211_assoc_success(struct ieee80211_work
*wk
,
1008 struct ieee80211_mgmt
*mgmt
, size_t len
)
1010 struct ieee80211_sub_if_data
*sdata
= wk
->sdata
;
1011 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1012 struct ieee80211_local
*local
= sdata
->local
;
1013 struct ieee80211_supported_band
*sband
;
1014 struct sta_info
*sta
;
1015 struct cfg80211_bss
*cbss
= wk
->assoc
.bss
;
1017 u32 rates
, basic_rates
;
1018 u16 capab_info
, aid
;
1019 struct ieee802_11_elems elems
;
1020 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1023 bool have_higher_than_11mbit
= false;
1024 u16 ap_ht_cap_flags
;
1026 /* AssocResp and ReassocResp have identical structure */
1028 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1029 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1031 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1032 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1033 "set\n", sdata
->name
, aid
);
1034 aid
&= ~(BIT(15) | BIT(14));
1036 pos
= mgmt
->u
.assoc_resp
.variable
;
1037 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1039 if (!elems
.supp_rates
) {
1040 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1047 sta
= sta_info_alloc(sdata
, cbss
->bssid
, GFP_KERNEL
);
1049 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1050 " the AP\n", sdata
->name
);
1054 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
|
1056 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1057 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1061 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1063 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1064 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1065 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1068 have_higher_than_11mbit
= true;
1070 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1071 if (sband
->bitrates
[j
].bitrate
== rate
) {
1074 basic_rates
|= BIT(j
);
1080 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1081 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1082 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1085 have_higher_than_11mbit
= true;
1087 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1088 if (sband
->bitrates
[j
].bitrate
== rate
) {
1091 basic_rates
|= BIT(j
);
1097 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1098 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1100 /* cf. IEEE 802.11 9.2.12 */
1101 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1102 have_higher_than_11mbit
)
1103 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1105 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1107 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1108 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1109 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1111 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1113 rate_control_rate_init(sta
);
1115 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1116 set_sta_flags(sta
, WLAN_STA_MFP
);
1118 if (elems
.wmm_param
)
1119 set_sta_flags(sta
, WLAN_STA_WME
);
1121 err
= sta_info_insert(sta
);
1124 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1125 " the AP (error %d)\n", sdata
->name
, err
);
1129 if (elems
.wmm_param
)
1130 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1131 elems
.wmm_param_len
);
1133 ieee80211_set_wmm_default(sdata
);
1135 local
->oper_channel
= wk
->chan
;
1137 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1138 (sdata
->local
->hw
.queues
>= 4) &&
1139 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1140 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1141 cbss
->bssid
, ap_ht_cap_flags
);
1143 /* set AID and assoc capability,
1144 * ieee80211_set_associated() will tell the driver */
1145 bss_conf
->aid
= aid
;
1146 bss_conf
->assoc_capability
= capab_info
;
1147 ieee80211_set_associated(sdata
, cbss
, changed
);
1150 * If we're using 4-addr mode, let the AP know that we're
1151 * doing so, so that it can create the STA VLAN on its side
1153 if (ifmgd
->use_4addr
)
1154 ieee80211_send_4addr_nullfunc(local
, sdata
);
1157 * Start timer to probe the connection to the AP now.
1158 * Also start the timer that will detect beacon loss.
1160 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1161 mod_beacon_timer(sdata
);
1167 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1168 struct ieee80211_mgmt
*mgmt
,
1170 struct ieee80211_rx_status
*rx_status
,
1171 struct ieee802_11_elems
*elems
,
1174 struct ieee80211_local
*local
= sdata
->local
;
1176 struct ieee80211_bss
*bss
;
1177 struct ieee80211_channel
*channel
;
1178 bool need_ps
= false;
1180 if (sdata
->u
.mgd
.associated
) {
1181 bss
= (void *)sdata
->u
.mgd
.associated
->priv
;
1182 /* not previously set so we may need to recalc */
1183 need_ps
= !bss
->dtim_period
;
1186 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1187 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1189 freq
= rx_status
->freq
;
1191 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1193 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1196 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1199 ieee80211_rx_bss_put(local
, bss
);
1201 if (!sdata
->u
.mgd
.associated
)
1205 mutex_lock(&local
->iflist_mtx
);
1206 ieee80211_recalc_ps(local
, -1);
1207 mutex_unlock(&local
->iflist_mtx
);
1210 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1211 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->bssid
,
1213 struct ieee80211_channel_sw_ie
*sw_elem
=
1214 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1215 ieee80211_sta_process_chanswitch(sdata
, sw_elem
, bss
);
1220 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1221 struct sk_buff
*skb
)
1223 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1224 struct ieee80211_if_managed
*ifmgd
;
1225 struct ieee80211_rx_status
*rx_status
= (void *) skb
->cb
;
1226 size_t baselen
, len
= skb
->len
;
1227 struct ieee802_11_elems elems
;
1229 ifmgd
= &sdata
->u
.mgd
;
1231 ASSERT_MGD_MTX(ifmgd
);
1233 if (memcmp(mgmt
->da
, sdata
->vif
.addr
, ETH_ALEN
))
1234 return; /* ignore ProbeResp to foreign address */
1236 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1240 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1243 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1245 if (ifmgd
->associated
&&
1246 memcmp(mgmt
->bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
) == 0 &&
1247 ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1248 IEEE80211_STA_CONNECTION_POLL
)) {
1249 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1250 IEEE80211_STA_BEACON_POLL
);
1251 mutex_lock(&sdata
->local
->iflist_mtx
);
1252 ieee80211_recalc_ps(sdata
->local
, -1);
1253 mutex_unlock(&sdata
->local
->iflist_mtx
);
1255 * We've received a probe response, but are not sure whether
1256 * we have or will be receiving any beacons or data, so let's
1257 * schedule the timers again, just in case.
1259 mod_beacon_timer(sdata
);
1260 mod_timer(&ifmgd
->conn_mon_timer
,
1261 round_jiffies_up(jiffies
+
1262 IEEE80211_CONNECTION_IDLE_TIME
));
1267 * This is the canonical list of information elements we care about,
1268 * the filter code also gives us all changes to the Microsoft OUI
1269 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1271 * We implement beacon filtering in software since that means we can
1272 * avoid processing the frame here and in cfg80211, and userspace
1273 * will not be able to tell whether the hardware supports it or not.
1275 * XXX: This list needs to be dynamic -- userspace needs to be able to
1276 * add items it requires. It also needs to be able to tell us to
1277 * look out for other vendor IEs.
1279 static const u64 care_about_ies
=
1280 (1ULL << WLAN_EID_COUNTRY
) |
1281 (1ULL << WLAN_EID_ERP_INFO
) |
1282 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1283 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1284 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1285 (1ULL << WLAN_EID_HT_INFORMATION
);
1287 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1288 struct ieee80211_mgmt
*mgmt
,
1290 struct ieee80211_rx_status
*rx_status
)
1292 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1294 struct ieee802_11_elems elems
;
1295 struct ieee80211_local
*local
= sdata
->local
;
1297 bool erp_valid
, directed_tim
= false;
1302 ASSERT_MGD_MTX(ifmgd
);
1304 /* Process beacon from the current BSS */
1305 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1309 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1313 * We might have received a number of frames, among them a
1314 * disassoc frame and a beacon...
1316 if (!ifmgd
->associated
)
1319 bssid
= ifmgd
->associated
->bssid
;
1322 * And in theory even frames from a different AP we were just
1323 * associated to a split-second ago!
1325 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1328 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1329 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1330 if (net_ratelimit()) {
1331 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1332 "to a received beacon\n", sdata
->name
);
1335 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1336 mutex_lock(&local
->iflist_mtx
);
1337 ieee80211_recalc_ps(local
, -1);
1338 mutex_unlock(&local
->iflist_mtx
);
1342 * Push the beacon loss detection into the future since
1343 * we are processing a beacon from the AP just now.
1345 mod_beacon_timer(sdata
);
1347 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1348 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1349 len
- baselen
, &elems
,
1350 care_about_ies
, ncrc
);
1352 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1353 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1356 if (ncrc
!= ifmgd
->beacon_crc
) {
1357 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1360 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1361 elems
.wmm_param_len
);
1364 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1366 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1367 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1368 ieee80211_hw_config(local
,
1369 IEEE80211_CONF_CHANGE_PS
);
1370 ieee80211_send_nullfunc(local
, sdata
, 0);
1372 local
->pspolling
= true;
1375 * Here is assumed that the driver will be
1376 * able to send ps-poll frame and receive a
1377 * response even though power save mode is
1378 * enabled, but some drivers might require
1379 * to disable power save here. This needs
1380 * to be investigated.
1382 ieee80211_send_pspoll(local
, sdata
);
1387 if (ncrc
== ifmgd
->beacon_crc
)
1389 ifmgd
->beacon_crc
= ncrc
;
1391 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1393 erp_value
= elems
.erp_info
[0];
1397 changed
|= ieee80211_handle_bss_capability(sdata
,
1398 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1399 erp_valid
, erp_value
);
1402 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1403 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1404 struct sta_info
*sta
;
1405 struct ieee80211_supported_band
*sband
;
1406 u16 ap_ht_cap_flags
;
1410 sta
= sta_info_get(sdata
, bssid
);
1411 if (WARN_ON(!sta
)) {
1416 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1418 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1419 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1421 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1425 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1426 bssid
, ap_ht_cap_flags
);
1429 /* Note: country IE parsing is done for us by cfg80211 */
1430 if (elems
.country_elem
) {
1431 /* TODO: IBSS also needs this */
1432 if (elems
.pwr_constr_elem
)
1433 ieee80211_handle_pwr_constr(sdata
,
1434 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1435 elems
.pwr_constr_elem
,
1436 elems
.pwr_constr_elem_len
);
1439 ieee80211_bss_info_change_notify(sdata
, changed
);
1442 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
1443 struct sk_buff
*skb
)
1445 struct ieee80211_local
*local
= sdata
->local
;
1446 struct ieee80211_mgmt
*mgmt
;
1450 return RX_DROP_MONITOR
;
1452 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1453 fc
= le16_to_cpu(mgmt
->frame_control
);
1455 switch (fc
& IEEE80211_FCTL_STYPE
) {
1456 case IEEE80211_STYPE_PROBE_RESP
:
1457 case IEEE80211_STYPE_BEACON
:
1458 case IEEE80211_STYPE_DEAUTH
:
1459 case IEEE80211_STYPE_DISASSOC
:
1460 case IEEE80211_STYPE_ACTION
:
1461 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
1462 ieee80211_queue_work(&local
->hw
, &sdata
->u
.mgd
.work
);
1466 return RX_DROP_MONITOR
;
1469 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1470 struct sk_buff
*skb
)
1472 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1473 struct ieee80211_rx_status
*rx_status
;
1474 struct ieee80211_mgmt
*mgmt
;
1475 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1478 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1479 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1480 fc
= le16_to_cpu(mgmt
->frame_control
);
1482 mutex_lock(&ifmgd
->mtx
);
1484 if (ifmgd
->associated
&&
1485 memcmp(ifmgd
->associated
->bssid
, mgmt
->bssid
, ETH_ALEN
) == 0) {
1486 switch (fc
& IEEE80211_FCTL_STYPE
) {
1487 case IEEE80211_STYPE_BEACON
:
1488 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1491 case IEEE80211_STYPE_PROBE_RESP
:
1492 ieee80211_rx_mgmt_probe_resp(sdata
, skb
);
1494 case IEEE80211_STYPE_DEAUTH
:
1495 rma
= ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1497 case IEEE80211_STYPE_DISASSOC
:
1498 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1500 case IEEE80211_STYPE_ACTION
:
1501 if (mgmt
->u
.action
.category
!= WLAN_CATEGORY_SPECTRUM_MGMT
)
1504 ieee80211_sta_process_chanswitch(sdata
,
1505 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1506 (void *)ifmgd
->associated
->priv
);
1509 mutex_unlock(&ifmgd
->mtx
);
1515 case RX_MGMT_CFG80211_DEAUTH
:
1516 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1518 case RX_MGMT_CFG80211_DISASSOC
:
1519 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1522 WARN(1, "unexpected: %d", rma
);
1527 mutex_unlock(&ifmgd
->mtx
);
1529 if (skb
->len
>= 24 + 2 /* mgmt + deauth reason */ &&
1530 (fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_DEAUTH
)
1531 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1537 static void ieee80211_sta_timer(unsigned long data
)
1539 struct ieee80211_sub_if_data
*sdata
=
1540 (struct ieee80211_sub_if_data
*) data
;
1541 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1542 struct ieee80211_local
*local
= sdata
->local
;
1544 if (local
->quiescing
) {
1545 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
1549 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
1552 static void ieee80211_sta_work(struct work_struct
*work
)
1554 struct ieee80211_sub_if_data
*sdata
=
1555 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
1556 struct ieee80211_local
*local
= sdata
->local
;
1557 struct ieee80211_if_managed
*ifmgd
;
1558 struct sk_buff
*skb
;
1560 if (!ieee80211_sdata_running(sdata
))
1563 if (local
->scanning
)
1566 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1570 * ieee80211_queue_work() should have picked up most cases,
1571 * here we'll pick the the rest.
1573 if (WARN(local
->suspended
, "STA MLME work scheduled while "
1574 "going to suspend\n"))
1577 ifmgd
= &sdata
->u
.mgd
;
1579 /* first process frames to avoid timing out while a frame is pending */
1580 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
1581 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1583 /* then process the rest of the work */
1584 mutex_lock(&ifmgd
->mtx
);
1586 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1587 IEEE80211_STA_CONNECTION_POLL
) &&
1588 ifmgd
->associated
) {
1591 memcpy(bssid
, ifmgd
->associated
->bssid
, ETH_ALEN
);
1592 if (time_is_after_jiffies(ifmgd
->probe_timeout
))
1593 run_again(ifmgd
, ifmgd
->probe_timeout
);
1595 else if (ifmgd
->probe_send_count
< IEEE80211_MAX_PROBE_TRIES
) {
1596 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1597 printk(KERN_DEBUG
"No probe response from AP %pM"
1598 " after %dms, try %d\n", bssid
,
1599 (1000 * IEEE80211_PROBE_WAIT
)/HZ
,
1600 ifmgd
->probe_send_count
);
1602 ieee80211_mgd_probe_ap_send(sdata
);
1605 * We actually lost the connection ... or did we?
1608 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1609 IEEE80211_STA_BEACON_POLL
);
1610 printk(KERN_DEBUG
"No probe response from AP %pM"
1611 " after %dms, disconnecting.\n",
1612 bssid
, (1000 * IEEE80211_PROBE_WAIT
)/HZ
);
1613 ieee80211_set_disassoc(sdata
);
1614 ieee80211_recalc_idle(local
);
1615 mutex_unlock(&ifmgd
->mtx
);
1617 * must be outside lock due to cfg80211,
1618 * but that's not a problem.
1620 ieee80211_send_deauth_disassoc(sdata
, bssid
,
1621 IEEE80211_STYPE_DEAUTH
,
1622 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
1624 mutex_lock(&ifmgd
->mtx
);
1628 mutex_unlock(&ifmgd
->mtx
);
1631 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
1633 struct ieee80211_sub_if_data
*sdata
=
1634 (struct ieee80211_sub_if_data
*) data
;
1635 struct ieee80211_local
*local
= sdata
->local
;
1637 if (local
->quiescing
)
1640 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.beacon_loss_work
);
1643 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
1645 struct ieee80211_sub_if_data
*sdata
=
1646 (struct ieee80211_sub_if_data
*) data
;
1647 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1648 struct ieee80211_local
*local
= sdata
->local
;
1650 if (local
->quiescing
)
1653 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
1656 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
1658 struct ieee80211_sub_if_data
*sdata
=
1659 container_of(work
, struct ieee80211_sub_if_data
,
1660 u
.mgd
.monitor_work
);
1662 ieee80211_mgd_probe_ap(sdata
, false);
1665 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
1667 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
1668 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
1669 IEEE80211_STA_CONNECTION_POLL
);
1671 /* let's probe the connection once */
1672 ieee80211_queue_work(&sdata
->local
->hw
,
1673 &sdata
->u
.mgd
.monitor_work
);
1674 /* and do all the other regular work too */
1675 ieee80211_queue_work(&sdata
->local
->hw
,
1676 &sdata
->u
.mgd
.work
);
1681 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
1683 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1686 * we need to use atomic bitops for the running bits
1687 * only because both timers might fire at the same
1688 * time -- the code here is properly synchronised.
1691 cancel_work_sync(&ifmgd
->work
);
1692 cancel_work_sync(&ifmgd
->beacon_loss_work
);
1693 if (del_timer_sync(&ifmgd
->timer
))
1694 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
1696 cancel_work_sync(&ifmgd
->chswitch_work
);
1697 if (del_timer_sync(&ifmgd
->chswitch_timer
))
1698 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
1700 cancel_work_sync(&ifmgd
->monitor_work
);
1701 /* these will just be re-established on connection */
1702 del_timer_sync(&ifmgd
->conn_mon_timer
);
1703 del_timer_sync(&ifmgd
->bcn_mon_timer
);
1706 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
1708 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1710 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
1711 add_timer(&ifmgd
->timer
);
1712 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
1713 add_timer(&ifmgd
->chswitch_timer
);
1717 /* interface setup */
1718 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
1720 struct ieee80211_if_managed
*ifmgd
;
1722 ifmgd
= &sdata
->u
.mgd
;
1723 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
1724 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
1725 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
1726 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
1727 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
1728 (unsigned long) sdata
);
1729 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
1730 (unsigned long) sdata
);
1731 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
1732 (unsigned long) sdata
);
1733 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
1734 (unsigned long) sdata
);
1735 skb_queue_head_init(&ifmgd
->skb_queue
);
1739 mutex_init(&ifmgd
->mtx
);
1741 if (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
)
1742 ifmgd
->req_smps
= IEEE80211_SMPS_AUTOMATIC
;
1744 ifmgd
->req_smps
= IEEE80211_SMPS_OFF
;
1747 /* scan finished notification */
1748 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
1750 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
1752 /* Restart STA timers */
1754 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
1755 ieee80211_restart_sta_timer(sdata
);
1759 int ieee80211_max_network_latency(struct notifier_block
*nb
,
1760 unsigned long data
, void *dummy
)
1762 s32 latency_usec
= (s32
) data
;
1763 struct ieee80211_local
*local
=
1764 container_of(nb
, struct ieee80211_local
,
1765 network_latency_notifier
);
1767 mutex_lock(&local
->iflist_mtx
);
1768 ieee80211_recalc_ps(local
, latency_usec
);
1769 mutex_unlock(&local
->iflist_mtx
);
1775 static enum work_done_result
1776 ieee80211_probe_auth_done(struct ieee80211_work
*wk
,
1777 struct sk_buff
*skb
)
1780 cfg80211_send_auth_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
1781 return WORK_DONE_DESTROY
;
1784 if (wk
->type
== IEEE80211_WORK_AUTH
) {
1785 cfg80211_send_rx_auth(wk
->sdata
->dev
, skb
->data
, skb
->len
);
1786 return WORK_DONE_DESTROY
;
1789 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
1790 ieee80211_rx_mgmt_probe_resp(wk
->sdata
, skb
);
1791 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
1793 wk
->type
= IEEE80211_WORK_AUTH
;
1794 wk
->probe_auth
.tries
= 0;
1795 return WORK_DONE_REQUEUE
;
1798 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
1799 struct cfg80211_auth_request
*req
)
1802 struct ieee80211_work
*wk
;
1805 switch (req
->auth_type
) {
1806 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
1807 auth_alg
= WLAN_AUTH_OPEN
;
1809 case NL80211_AUTHTYPE_SHARED_KEY
:
1810 auth_alg
= WLAN_AUTH_SHARED_KEY
;
1812 case NL80211_AUTHTYPE_FT
:
1813 auth_alg
= WLAN_AUTH_FT
;
1815 case NL80211_AUTHTYPE_NETWORK_EAP
:
1816 auth_alg
= WLAN_AUTH_LEAP
;
1822 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
1826 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
1828 if (req
->ie
&& req
->ie_len
) {
1829 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
1830 wk
->ie_len
= req
->ie_len
;
1833 if (req
->key
&& req
->key_len
) {
1834 wk
->probe_auth
.key_len
= req
->key_len
;
1835 wk
->probe_auth
.key_idx
= req
->key_idx
;
1836 memcpy(wk
->probe_auth
.key
, req
->key
, req
->key_len
);
1839 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
1840 memcpy(wk
->probe_auth
.ssid
, ssid
+ 2, ssid
[1]);
1841 wk
->probe_auth
.ssid_len
= ssid
[1];
1843 wk
->probe_auth
.algorithm
= auth_alg
;
1844 wk
->probe_auth
.privacy
= req
->bss
->capability
& WLAN_CAPABILITY_PRIVACY
;
1846 /* if we already have a probe, don't probe again */
1847 if (req
->bss
->proberesp_ies
)
1848 wk
->type
= IEEE80211_WORK_AUTH
;
1850 wk
->type
= IEEE80211_WORK_DIRECT_PROBE
;
1851 wk
->chan
= req
->bss
->channel
;
1853 wk
->done
= ieee80211_probe_auth_done
;
1855 ieee80211_add_work(wk
);
1859 static enum work_done_result
ieee80211_assoc_done(struct ieee80211_work
*wk
,
1860 struct sk_buff
*skb
)
1862 struct ieee80211_mgmt
*mgmt
;
1866 cfg80211_send_assoc_timeout(wk
->sdata
->dev
, wk
->filter_ta
);
1867 return WORK_DONE_DESTROY
;
1870 mgmt
= (void *)skb
->data
;
1871 status
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1873 if (status
== WLAN_STATUS_SUCCESS
) {
1874 mutex_lock(&wk
->sdata
->u
.mgd
.mtx
);
1875 if (!ieee80211_assoc_success(wk
, mgmt
, skb
->len
)) {
1876 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
1877 /* oops -- internal error -- send timeout for now */
1878 cfg80211_send_assoc_timeout(wk
->sdata
->dev
,
1880 return WORK_DONE_DESTROY
;
1882 mutex_unlock(&wk
->sdata
->u
.mgd
.mtx
);
1885 cfg80211_send_rx_assoc(wk
->sdata
->dev
, skb
->data
, skb
->len
);
1886 return WORK_DONE_DESTROY
;
1889 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
1890 struct cfg80211_assoc_request
*req
)
1892 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1893 struct ieee80211_bss
*bss
= (void *)req
->bss
->priv
;
1894 struct ieee80211_work
*wk
;
1898 mutex_lock(&ifmgd
->mtx
);
1899 if (ifmgd
->associated
) {
1900 if (!req
->prev_bssid
||
1901 memcmp(req
->prev_bssid
, ifmgd
->associated
->bssid
,
1904 * We are already associated and the request was not a
1905 * reassociation request from the current BSS, so
1908 mutex_unlock(&ifmgd
->mtx
);
1912 /* Trying to reassociate - clear previous association state */
1913 ieee80211_set_disassoc(sdata
);
1915 mutex_unlock(&ifmgd
->mtx
);
1917 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
1921 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
1922 ifmgd
->flags
&= ~IEEE80211_STA_NULLFUNC_ACKED
;
1924 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
1925 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
1926 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
1927 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
1928 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
1931 if (req
->ie
&& req
->ie_len
) {
1932 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
1933 wk
->ie_len
= req
->ie_len
;
1937 wk
->assoc
.bss
= req
->bss
;
1939 memcpy(wk
->filter_ta
, req
->bss
->bssid
, ETH_ALEN
);
1941 /* new association always uses requested smps mode */
1942 if (ifmgd
->req_smps
== IEEE80211_SMPS_AUTOMATIC
) {
1943 if (ifmgd
->powersave
)
1944 ifmgd
->ap_smps
= IEEE80211_SMPS_DYNAMIC
;
1946 ifmgd
->ap_smps
= IEEE80211_SMPS_OFF
;
1948 ifmgd
->ap_smps
= ifmgd
->req_smps
;
1950 wk
->assoc
.smps
= ifmgd
->ap_smps
;
1952 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
1953 * We still associate in non-HT mode (11a/b/g) if any one of these
1954 * ciphers is configured as pairwise.
1955 * We can set this to true for non-11n hardware, that'll be checked
1956 * separately along with the peer capabilities.
1958 wk
->assoc
.use_11n
= !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
);
1959 wk
->assoc
.capability
= req
->bss
->capability
;
1960 wk
->assoc
.wmm_used
= bss
->wmm_used
;
1961 wk
->assoc
.supp_rates
= bss
->supp_rates
;
1962 wk
->assoc
.supp_rates_len
= bss
->supp_rates_len
;
1963 wk
->assoc
.ht_information_ie
=
1964 ieee80211_bss_get_ie(req
->bss
, WLAN_EID_HT_INFORMATION
);
1966 if (bss
->wmm_used
&& bss
->uapsd_supported
&&
1967 (sdata
->local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)) {
1968 wk
->assoc
.uapsd_used
= true;
1969 ifmgd
->flags
|= IEEE80211_STA_UAPSD_ENABLED
;
1971 wk
->assoc
.uapsd_used
= false;
1972 ifmgd
->flags
&= ~IEEE80211_STA_UAPSD_ENABLED
;
1975 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
1976 memcpy(wk
->assoc
.ssid
, ssid
+ 2, ssid
[1]);
1977 wk
->assoc
.ssid_len
= ssid
[1];
1979 if (req
->prev_bssid
)
1980 memcpy(wk
->assoc
.prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
1982 wk
->type
= IEEE80211_WORK_ASSOC
;
1983 wk
->chan
= req
->bss
->channel
;
1985 wk
->done
= ieee80211_assoc_done
;
1988 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
1989 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
1991 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
1992 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
1995 if (req
->crypto
.control_port
)
1996 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
1998 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2000 ieee80211_add_work(wk
);
2004 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2005 struct cfg80211_deauth_request
*req
,
2008 struct ieee80211_local
*local
= sdata
->local
;
2009 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2010 struct ieee80211_work
*wk
;
2011 const u8
*bssid
= req
->bss
->bssid
;
2013 mutex_lock(&ifmgd
->mtx
);
2015 if (ifmgd
->associated
== req
->bss
) {
2016 bssid
= req
->bss
->bssid
;
2017 ieee80211_set_disassoc(sdata
);
2018 mutex_unlock(&ifmgd
->mtx
);
2020 bool not_auth_yet
= false;
2022 mutex_unlock(&ifmgd
->mtx
);
2024 mutex_lock(&local
->work_mtx
);
2025 list_for_each_entry(wk
, &local
->work_list
, list
) {
2026 if (wk
->sdata
!= sdata
)
2029 if (wk
->type
!= IEEE80211_WORK_DIRECT_PROBE
&&
2030 wk
->type
!= IEEE80211_WORK_AUTH
)
2033 if (memcmp(req
->bss
->bssid
, wk
->filter_ta
, ETH_ALEN
))
2036 not_auth_yet
= wk
->type
== IEEE80211_WORK_DIRECT_PROBE
;
2037 list_del_rcu(&wk
->list
);
2041 mutex_unlock(&local
->work_mtx
);
2044 * If somebody requests authentication and we haven't
2045 * sent out an auth frame yet there's no need to send
2046 * out a deauth frame either. If the state was PROBE,
2047 * then this is the case. If it's AUTH we have sent a
2048 * frame, and if it's IDLE we have completed the auth
2052 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2057 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2058 sdata
->name
, bssid
, req
->reason_code
);
2060 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2061 IEEE80211_STYPE_DEAUTH
, req
->reason_code
,
2064 ieee80211_recalc_idle(sdata
->local
);
2069 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2070 struct cfg80211_disassoc_request
*req
,
2073 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2075 mutex_lock(&ifmgd
->mtx
);
2078 * cfg80211 should catch this ... but it's racy since
2079 * we can receive a disassoc frame, process it, hand it
2080 * to cfg80211 while that's in a locked section already
2081 * trying to tell us that the user wants to disconnect.
2083 if (ifmgd
->associated
!= req
->bss
) {
2084 mutex_unlock(&ifmgd
->mtx
);
2088 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2089 sdata
->name
, req
->bss
->bssid
, req
->reason_code
);
2091 ieee80211_set_disassoc(sdata
);
2093 mutex_unlock(&ifmgd
->mtx
);
2095 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2096 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2099 ieee80211_recalc_idle(sdata
->local
);
2104 int ieee80211_mgd_action(struct ieee80211_sub_if_data
*sdata
,
2105 struct ieee80211_channel
*chan
,
2106 enum nl80211_channel_type channel_type
,
2107 const u8
*buf
, size_t len
, u64
*cookie
)
2109 struct ieee80211_local
*local
= sdata
->local
;
2110 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2111 struct sk_buff
*skb
;
2113 /* Check that we are on the requested channel for transmission */
2114 if ((chan
!= local
->tmp_channel
||
2115 channel_type
!= local
->tmp_channel_type
) &&
2116 (chan
!= local
->oper_channel
||
2117 channel_type
!= local
->oper_channel_type
))
2120 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ len
);
2123 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2125 memcpy(skb_put(skb
, len
), buf
, len
);
2127 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
2128 IEEE80211_SKB_CB(skb
)->flags
|=
2129 IEEE80211_TX_INTFL_DONT_ENCRYPT
;
2130 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_NL80211_FRAME_TX
|
2131 IEEE80211_TX_CTL_REQ_TX_STATUS
;
2132 skb
->dev
= sdata
->dev
;
2133 ieee80211_tx_skb(sdata
, skb
);
2135 *cookie
= (unsigned long) skb
;