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_AUTH_TIMEOUT (HZ / 5)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MAX_PROBE_TRIES 5
37 * beacon loss detection timeout
38 * XXX: should depend on beacon interval
40 #define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
42 * Time the connection can be idle before we probe
43 * it to see if we can still talk to the AP.
45 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
47 * Time we wait for a probe response after sending
48 * a probe request because of beacon loss or for
49 * checking the connection still works.
51 #define IEEE80211_PROBE_WAIT (HZ / 2)
53 #define TMR_RUNNING_TIMER 0
54 #define TMR_RUNNING_CHANSW 1
57 * All cfg80211 functions have to be called outside a locked
58 * section so that they can acquire a lock themselves... This
59 * is much simpler than queuing up things in cfg80211, but we
60 * do need some indirection for that here.
63 /* no action required */
66 /* caller must call cfg80211_send_rx_auth() */
67 RX_MGMT_CFG80211_AUTH
,
69 /* caller must call cfg80211_send_rx_assoc() */
70 RX_MGMT_CFG80211_ASSOC
,
72 /* caller must call cfg80211_send_deauth() */
73 RX_MGMT_CFG80211_DEAUTH
,
75 /* caller must call cfg80211_send_disassoc() */
76 RX_MGMT_CFG80211_DISASSOC
,
78 /* caller must call cfg80211_auth_timeout() & free work */
79 RX_MGMT_CFG80211_AUTH_TO
,
81 /* caller must call cfg80211_assoc_timeout() & free work */
82 RX_MGMT_CFG80211_ASSOC_TO
,
86 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed
*ifmgd
)
88 WARN_ON(!mutex_is_locked(&ifmgd
->mtx
));
92 * We can have multiple work items (and connection probing)
93 * scheduling this timer, but we need to take care to only
94 * reschedule it when it should fire _earlier_ than it was
95 * asked for before, or if it's not pending right now. This
96 * function ensures that. Note that it then is required to
97 * run this function for all timeouts after the first one
98 * has happened -- the work that runs from this timer will
101 static void run_again(struct ieee80211_if_managed
*ifmgd
,
102 unsigned long timeout
)
104 ASSERT_MGD_MTX(ifmgd
);
106 if (!timer_pending(&ifmgd
->timer
) ||
107 time_before(timeout
, ifmgd
->timer
.expires
))
108 mod_timer(&ifmgd
->timer
, timeout
);
111 static void mod_beacon_timer(struct ieee80211_sub_if_data
*sdata
)
113 if (sdata
->local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
)
116 mod_timer(&sdata
->u
.mgd
.bcn_mon_timer
,
117 round_jiffies_up(jiffies
+ IEEE80211_BEACON_LOSS_TIME
));
120 static int ecw2cw(int ecw
)
122 return (1 << ecw
) - 1;
125 static int ieee80211_compatible_rates(struct ieee80211_bss
*bss
,
126 struct ieee80211_supported_band
*sband
,
132 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
133 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
135 for (j
= 0; j
< sband
->n_bitrates
; j
++)
136 if (sband
->bitrates
[j
].bitrate
== rate
) {
147 * ieee80211_enable_ht should be called only after the operating band
148 * has been determined as ht configuration depends on the hw's
149 * HT abilities for a specific band.
151 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
152 struct ieee80211_ht_info
*hti
,
153 const u8
*bssid
, u16 ap_ht_cap_flags
)
155 struct ieee80211_local
*local
= sdata
->local
;
156 struct ieee80211_supported_band
*sband
;
157 struct sta_info
*sta
;
160 bool enable_ht
= true, ht_changed
;
161 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
163 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
165 /* HT is not supported */
166 if (!sband
->ht_cap
.ht_supported
)
169 /* check that channel matches the right operating channel */
170 if (local
->hw
.conf
.channel
->center_freq
!=
171 ieee80211_channel_to_frequency(hti
->control_chan
))
175 channel_type
= NL80211_CHAN_HT20
;
177 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
178 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
179 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
180 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
181 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
182 if (!(local
->hw
.conf
.channel
->flags
&
183 IEEE80211_CHAN_NO_HT40PLUS
))
184 channel_type
= NL80211_CHAN_HT40PLUS
;
186 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
187 if (!(local
->hw
.conf
.channel
->flags
&
188 IEEE80211_CHAN_NO_HT40MINUS
))
189 channel_type
= NL80211_CHAN_HT40MINUS
;
195 ht_changed
= conf_is_ht(&local
->hw
.conf
) != enable_ht
||
196 channel_type
!= local
->hw
.conf
.channel_type
;
198 local
->oper_channel_type
= channel_type
;
201 /* channel_type change automatically detected */
202 ieee80211_hw_config(local
, 0);
205 sta
= sta_info_get(local
, bssid
);
207 rate_control_rate_update(local
, sband
, sta
,
208 IEEE80211_RC_HT_CHANGED
);
216 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
218 /* if bss configuration changed store the new one */
219 if (!sdata
->ht_opmode_valid
||
220 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
221 changed
|= BSS_CHANGED_HT
;
222 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
223 sdata
->ht_opmode_valid
= true;
229 /* frame sending functions */
231 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
,
232 struct ieee80211_mgd_work
*wk
)
234 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
235 struct ieee80211_local
*local
= sdata
->local
;
237 struct ieee80211_mgmt
*mgmt
;
239 const u8
*ies
, *ht_ie
;
240 int i
, len
, count
, rates_len
, supp_rates_len
;
243 struct ieee80211_supported_band
*sband
;
246 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
247 sizeof(*mgmt
) + 200 + wk
->ie_len
+
250 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
251 "frame\n", sdata
->dev
->name
);
254 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
256 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
258 capab
= ifmgd
->capab
;
260 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
261 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
262 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
263 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
264 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
267 if (wk
->bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
)
268 capab
|= WLAN_CAPABILITY_PRIVACY
;
269 if (wk
->bss
->wmm_used
)
272 /* get all rates supported by the device and the AP as
273 * some APs don't like getting a superset of their rates
274 * in the association request (e.g. D-Link DAP 1353 in
276 rates_len
= ieee80211_compatible_rates(wk
->bss
, sband
, &rates
);
278 if ((wk
->bss
->cbss
.capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
279 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
280 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
282 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
284 memcpy(mgmt
->da
, wk
->bss
->cbss
.bssid
, ETH_ALEN
);
285 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
286 memcpy(mgmt
->bssid
, wk
->bss
->cbss
.bssid
, ETH_ALEN
);
288 if (!is_zero_ether_addr(wk
->prev_bssid
)) {
290 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
291 IEEE80211_STYPE_REASSOC_REQ
);
292 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
293 mgmt
->u
.reassoc_req
.listen_interval
=
294 cpu_to_le16(local
->hw
.conf
.listen_interval
);
295 memcpy(mgmt
->u
.reassoc_req
.current_ap
, wk
->prev_bssid
,
299 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
300 IEEE80211_STYPE_ASSOC_REQ
);
301 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
302 mgmt
->u
.assoc_req
.listen_interval
=
303 cpu_to_le16(local
->hw
.conf
.listen_interval
);
307 ies
= pos
= skb_put(skb
, 2 + wk
->ssid_len
);
308 *pos
++ = WLAN_EID_SSID
;
309 *pos
++ = wk
->ssid_len
;
310 memcpy(pos
, wk
->ssid
, wk
->ssid_len
);
312 /* add all rates which were marked to be used above */
313 supp_rates_len
= rates_len
;
314 if (supp_rates_len
> 8)
317 len
= sband
->n_bitrates
;
318 pos
= skb_put(skb
, supp_rates_len
+ 2);
319 *pos
++ = WLAN_EID_SUPP_RATES
;
320 *pos
++ = supp_rates_len
;
323 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
324 if (BIT(i
) & rates
) {
325 int rate
= sband
->bitrates
[i
].bitrate
;
326 *pos
++ = (u8
) (rate
/ 5);
332 if (rates_len
> count
) {
333 pos
= skb_put(skb
, rates_len
- count
+ 2);
334 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
335 *pos
++ = rates_len
- count
;
337 for (i
++; i
< sband
->n_bitrates
; i
++) {
338 if (BIT(i
) & rates
) {
339 int rate
= sband
->bitrates
[i
].bitrate
;
340 *pos
++ = (u8
) (rate
/ 5);
345 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
346 /* 1. power capabilities */
347 pos
= skb_put(skb
, 4);
348 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
350 *pos
++ = 0; /* min tx power */
351 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
353 /* 2. supported channels */
354 /* TODO: get this in reg domain format */
355 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
356 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
357 *pos
++ = 2 * sband
->n_channels
;
358 for (i
= 0; i
< sband
->n_channels
; i
++) {
359 *pos
++ = ieee80211_frequency_to_channel(
360 sband
->channels
[i
].center_freq
);
361 *pos
++ = 1; /* one channel in the subband*/
365 if (wk
->ie_len
&& wk
->ie
) {
366 pos
= skb_put(skb
, wk
->ie_len
);
367 memcpy(pos
, wk
->ie
, wk
->ie_len
);
370 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
371 pos
= skb_put(skb
, 9);
372 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
373 *pos
++ = 7; /* len */
374 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
377 *pos
++ = 2; /* WME */
378 *pos
++ = 0; /* WME info */
379 *pos
++ = 1; /* WME ver */
383 /* wmm support is a must to HT */
385 * IEEE802.11n does not allow TKIP/WEP as pairwise
386 * ciphers in HT mode. We still associate in non-ht
387 * mode (11a/b/g) if any one of these ciphers is
388 * configured as pairwise.
390 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
391 sband
->ht_cap
.ht_supported
&&
392 (ht_ie
= ieee80211_bss_get_ie(&wk
->bss
->cbss
, WLAN_EID_HT_INFORMATION
)) &&
393 ht_ie
[1] >= sizeof(struct ieee80211_ht_info
) &&
394 (!(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))) {
395 struct ieee80211_ht_info
*ht_info
=
396 (struct ieee80211_ht_info
*)(ht_ie
+ 2);
397 u16 cap
= sband
->ht_cap
.cap
;
399 u32 flags
= local
->hw
.conf
.channel
->flags
;
401 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
402 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
403 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
404 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
405 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
408 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
409 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
410 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
411 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
416 tmp
= cpu_to_le16(cap
);
417 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
418 *pos
++ = WLAN_EID_HT_CAPABILITY
;
419 *pos
++ = sizeof(struct ieee80211_ht_cap
);
420 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
421 memcpy(pos
, &tmp
, sizeof(u16
));
423 /* TODO: needs a define here for << 2 */
424 *pos
++ = sband
->ht_cap
.ampdu_factor
|
425 (sband
->ht_cap
.ampdu_density
<< 2);
426 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
429 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
430 ieee80211_tx_skb(sdata
, skb
);
434 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
435 const u8
*bssid
, u16 stype
, u16 reason
,
438 struct ieee80211_local
*local
= sdata
->local
;
439 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
441 struct ieee80211_mgmt
*mgmt
;
443 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
445 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
446 "deauth/disassoc frame\n", sdata
->dev
->name
);
449 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
451 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
453 memcpy(mgmt
->da
, bssid
, ETH_ALEN
);
454 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
455 memcpy(mgmt
->bssid
, bssid
, ETH_ALEN
);
456 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
458 /* u.deauth.reason_code == u.disassoc.reason_code */
459 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
461 if (stype
== IEEE80211_STYPE_DEAUTH
)
463 __cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
465 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
468 __cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
470 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
471 if (!(ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
))
472 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
473 ieee80211_tx_skb(sdata
, skb
);
476 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
477 struct ieee80211_sub_if_data
*sdata
)
479 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
480 struct ieee80211_pspoll
*pspoll
;
484 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
486 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
487 "pspoll frame\n", sdata
->dev
->name
);
490 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
492 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
493 memset(pspoll
, 0, sizeof(*pspoll
));
494 fc
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
| IEEE80211_FCTL_PM
;
495 pspoll
->frame_control
= cpu_to_le16(fc
);
496 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
498 /* aid in PS-Poll has its two MSBs each set to 1 */
499 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
501 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
502 memcpy(pspoll
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
504 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
505 ieee80211_tx_skb(sdata
, skb
);
508 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
509 struct ieee80211_sub_if_data
*sdata
,
513 struct ieee80211_hdr
*nullfunc
;
516 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
519 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
521 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
522 "frame\n", sdata
->dev
->name
);
525 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
527 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
528 memset(nullfunc
, 0, 24);
529 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
530 IEEE80211_FCTL_TODS
);
532 fc
|= cpu_to_le16(IEEE80211_FCTL_PM
);
533 nullfunc
->frame_control
= fc
;
534 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
535 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
536 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
538 IEEE80211_SKB_CB(skb
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
539 ieee80211_tx_skb(sdata
, skb
);
542 /* spectrum management related things */
543 static void ieee80211_chswitch_work(struct work_struct
*work
)
545 struct ieee80211_sub_if_data
*sdata
=
546 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
547 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
549 if (!netif_running(sdata
->dev
))
552 mutex_lock(&ifmgd
->mtx
);
553 if (!ifmgd
->associated
)
556 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
557 ieee80211_hw_config(sdata
->local
, IEEE80211_CONF_CHANGE_CHANNEL
);
559 /* XXX: shouldn't really modify cfg80211-owned data! */
560 ifmgd
->associated
->cbss
.channel
= sdata
->local
->oper_channel
;
562 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
563 IEEE80211_QUEUE_STOP_REASON_CSA
);
565 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
566 mutex_unlock(&ifmgd
->mtx
);
569 static void ieee80211_chswitch_timer(unsigned long data
)
571 struct ieee80211_sub_if_data
*sdata
=
572 (struct ieee80211_sub_if_data
*) data
;
573 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
575 if (sdata
->local
->quiescing
) {
576 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
580 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
583 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
584 struct ieee80211_channel_sw_ie
*sw_elem
,
585 struct ieee80211_bss
*bss
)
587 struct ieee80211_channel
*new_ch
;
588 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
589 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
);
591 ASSERT_MGD_MTX(ifmgd
);
593 if (!ifmgd
->associated
)
596 if (sdata
->local
->scanning
)
599 /* Disregard subsequent beacons if we are already running a timer
602 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
605 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
606 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
609 sdata
->local
->csa_channel
= new_ch
;
611 if (sw_elem
->count
<= 1) {
612 ieee80211_queue_work(&sdata
->local
->hw
, &ifmgd
->chswitch_work
);
614 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
615 IEEE80211_QUEUE_STOP_REASON_CSA
);
616 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
617 mod_timer(&ifmgd
->chswitch_timer
,
619 msecs_to_jiffies(sw_elem
->count
*
620 bss
->cbss
.beacon_interval
));
624 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
625 u16 capab_info
, u8
*pwr_constr_elem
,
626 u8 pwr_constr_elem_len
)
628 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
630 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
633 /* Power constraint IE length should be 1 octet */
634 if (pwr_constr_elem_len
!= 1)
637 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
638 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
639 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
640 ieee80211_hw_config(sdata
->local
, 0);
645 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
646 struct ieee80211_sub_if_data
*sdata
)
648 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
651 * If we are scanning right now then the parameters will
652 * take effect when scan finishes.
657 if (conf
->dynamic_ps_timeout
> 0 &&
658 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
659 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
660 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
662 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
663 ieee80211_send_nullfunc(local
, sdata
, 1);
664 conf
->flags
|= IEEE80211_CONF_PS
;
665 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
669 static void ieee80211_change_ps(struct ieee80211_local
*local
)
671 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
673 if (local
->ps_sdata
) {
674 ieee80211_enable_ps(local
, local
->ps_sdata
);
675 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
676 conf
->flags
&= ~IEEE80211_CONF_PS
;
677 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
678 del_timer_sync(&local
->dynamic_ps_timer
);
679 cancel_work_sync(&local
->dynamic_ps_enable_work
);
683 /* need to hold RTNL or interface lock */
684 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
686 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
689 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
690 local
->ps_sdata
= NULL
;
694 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
695 if (!netif_running(sdata
->dev
))
697 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
703 if (count
== 1 && found
->u
.mgd
.powersave
&&
704 found
->u
.mgd
.associated
&& list_empty(&found
->u
.mgd
.work_list
) &&
705 !(found
->u
.mgd
.flags
& (IEEE80211_STA_BEACON_POLL
|
706 IEEE80211_STA_CONNECTION_POLL
))) {
710 latency
= pm_qos_requirement(PM_QOS_NETWORK_LATENCY
);
712 beaconint_us
= ieee80211_tu_to_usec(
713 found
->vif
.bss_conf
.beacon_int
);
715 if (beaconint_us
> latency
) {
716 local
->ps_sdata
= NULL
;
718 u8 dtimper
= found
->vif
.bss_conf
.dtim_period
;
722 maxslp
= min_t(int, dtimper
,
723 latency
/ beaconint_us
);
725 local
->hw
.conf
.max_sleep_period
= maxslp
;
726 local
->ps_sdata
= found
;
729 local
->ps_sdata
= NULL
;
732 ieee80211_change_ps(local
);
735 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
737 struct ieee80211_local
*local
=
738 container_of(work
, struct ieee80211_local
,
739 dynamic_ps_disable_work
);
741 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
742 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
743 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
746 ieee80211_wake_queues_by_reason(&local
->hw
,
747 IEEE80211_QUEUE_STOP_REASON_PS
);
750 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
752 struct ieee80211_local
*local
=
753 container_of(work
, struct ieee80211_local
,
754 dynamic_ps_enable_work
);
755 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
757 /* can only happen when PS was just disabled anyway */
761 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
764 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
765 ieee80211_send_nullfunc(local
, sdata
, 1);
767 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
768 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
771 void ieee80211_dynamic_ps_timer(unsigned long data
)
773 struct ieee80211_local
*local
= (void *) data
;
775 if (local
->quiescing
|| local
->suspended
)
778 ieee80211_queue_work(&local
->hw
, &local
->dynamic_ps_enable_work
);
782 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
783 struct ieee80211_if_managed
*ifmgd
,
784 u8
*wmm_param
, size_t wmm_param_len
)
786 struct ieee80211_tx_queue_params params
;
791 if (!(ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
))
797 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
799 count
= wmm_param
[6] & 0x0f;
800 if (count
== ifmgd
->wmm_last_param_set
)
802 ifmgd
->wmm_last_param_set
= count
;
805 left
= wmm_param_len
- 8;
807 memset(¶ms
, 0, sizeof(params
));
810 for (; left
>= 4; left
-= 4, pos
+= 4) {
811 int aci
= (pos
[0] >> 5) & 0x03;
812 int acm
= (pos
[0] >> 4) & 0x01;
819 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
824 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
829 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
835 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
839 params
.aifs
= pos
[0] & 0x0f;
840 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
841 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
842 params
.txop
= get_unaligned_le16(pos
+ 2);
843 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
844 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
845 "cWmin=%d cWmax=%d txop=%d\n",
846 wiphy_name(local
->hw
.wiphy
), queue
, aci
, acm
,
847 params
.aifs
, params
.cw_min
, params
.cw_max
, params
.txop
);
849 if (drv_conf_tx(local
, queue
, ¶ms
) && local
->ops
->conf_tx
)
850 printk(KERN_DEBUG
"%s: failed to set TX queue "
851 "parameters for queue %d\n",
852 wiphy_name(local
->hw
.wiphy
), queue
);
856 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
857 u16 capab
, bool erp_valid
, u8 erp
)
859 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
862 bool use_short_preamble
;
866 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
867 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
869 use_protection
= false;
870 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
873 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
875 if (use_protection
!= bss_conf
->use_cts_prot
) {
876 bss_conf
->use_cts_prot
= use_protection
;
877 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
880 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
881 bss_conf
->use_short_preamble
= use_short_preamble
;
882 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
885 if (use_short_slot
!= bss_conf
->use_short_slot
) {
886 bss_conf
->use_short_slot
= use_short_slot
;
887 changed
|= BSS_CHANGED_ERP_SLOT
;
893 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
894 struct ieee80211_mgd_work
*wk
,
895 u32 bss_info_changed
)
897 struct ieee80211_local
*local
= sdata
->local
;
898 struct ieee80211_bss
*bss
= wk
->bss
;
900 bss_info_changed
|= BSS_CHANGED_ASSOC
;
901 /* set timing information */
902 sdata
->vif
.bss_conf
.beacon_int
= bss
->cbss
.beacon_interval
;
903 sdata
->vif
.bss_conf
.timestamp
= bss
->cbss
.tsf
;
904 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
906 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
907 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
908 bss
->cbss
.capability
, bss
->has_erp_value
, bss
->erp_value
);
910 sdata
->u
.mgd
.associated
= bss
;
911 sdata
->u
.mgd
.old_associate_work
= wk
;
912 memcpy(sdata
->u
.mgd
.bssid
, bss
->cbss
.bssid
, ETH_ALEN
);
914 /* just to be sure */
915 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
916 IEEE80211_STA_BEACON_POLL
);
918 ieee80211_led_assoc(local
, 1);
920 sdata
->vif
.bss_conf
.assoc
= 1;
922 * For now just always ask the driver to update the basic rateset
923 * when we have associated, we aren't checking whether it actually
926 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
928 /* And the BSSID changed - we're associated now */
929 bss_info_changed
|= BSS_CHANGED_BSSID
;
931 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
933 mutex_lock(&local
->iflist_mtx
);
934 ieee80211_recalc_ps(local
, -1);
935 mutex_unlock(&local
->iflist_mtx
);
937 netif_start_queue(sdata
->dev
);
938 netif_carrier_on(sdata
->dev
);
941 static enum rx_mgmt_action __must_check
942 ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
,
943 struct ieee80211_mgd_work
*wk
)
945 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
946 struct ieee80211_local
*local
= sdata
->local
;
949 if (wk
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
950 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
951 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
);
954 * Most likely AP is not in the range so remove the
955 * bss struct for that AP.
957 cfg80211_unlink_bss(local
->hw
.wiphy
, &wk
->bss
->cbss
);
960 * We might have a pending scan which had no chance to run yet
961 * due to work needing to be done. Hence, queue the STAs work
964 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
965 return RX_MGMT_CFG80211_AUTH_TO
;
968 printk(KERN_DEBUG
"%s: direct probe to AP %pM (try %d)\n",
969 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
,
973 * Direct probe is sent to broadcast address as some APs
974 * will not answer to direct packet in unassociated state.
976 ieee80211_send_probe_req(sdata
, NULL
, wk
->ssid
, wk
->ssid_len
, NULL
, 0);
978 wk
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
979 run_again(ifmgd
, wk
->timeout
);
985 static enum rx_mgmt_action __must_check
986 ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
,
987 struct ieee80211_mgd_work
*wk
)
989 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
990 struct ieee80211_local
*local
= sdata
->local
;
993 if (wk
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
994 printk(KERN_DEBUG
"%s: authentication with AP %pM"
996 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
);
999 * Most likely AP is not in the range so remove the
1000 * bss struct for that AP.
1002 cfg80211_unlink_bss(local
->hw
.wiphy
, &wk
->bss
->cbss
);
1005 * We might have a pending scan which had no chance to run yet
1006 * due to work needing to be done. Hence, queue the STAs work
1009 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
1010 return RX_MGMT_CFG80211_AUTH_TO
;
1013 printk(KERN_DEBUG
"%s: authenticate with AP %pM (try %d)\n",
1014 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
, wk
->tries
);
1016 ieee80211_send_auth(sdata
, 1, wk
->auth_alg
, wk
->ie
, wk
->ie_len
,
1017 wk
->bss
->cbss
.bssid
, NULL
, 0, 0);
1018 wk
->auth_transaction
= 2;
1020 wk
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
1021 run_again(ifmgd
, wk
->timeout
);
1023 return RX_MGMT_NONE
;
1026 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1029 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1030 struct ieee80211_local
*local
= sdata
->local
;
1031 struct sta_info
*sta
;
1032 u32 changed
= 0, config_changed
= 0;
1035 ASSERT_MGD_MTX(ifmgd
);
1037 if (WARN_ON(!ifmgd
->associated
))
1040 memcpy(bssid
, ifmgd
->associated
->cbss
.bssid
, ETH_ALEN
);
1042 ifmgd
->associated
= NULL
;
1043 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1046 kfree(ifmgd
->old_associate_work
);
1047 ifmgd
->old_associate_work
= NULL
;
1049 struct ieee80211_mgd_work
*wk
= ifmgd
->old_associate_work
;
1051 wk
->state
= IEEE80211_MGD_STATE_IDLE
;
1052 list_add(&wk
->list
, &ifmgd
->work_list
);
1056 * we need to commit the associated = NULL change because the
1057 * scan code uses that to determine whether this iface should
1058 * go to/wake up from powersave or not -- and could otherwise
1059 * wake the queues erroneously.
1064 * Thus, we can only afterwards stop the queues -- to account
1065 * for the case where another CPU is finishing a scan at this
1066 * time -- we don't want the scan code to enable queues.
1069 netif_stop_queue(sdata
->dev
);
1070 netif_carrier_off(sdata
->dev
);
1073 sta
= sta_info_get(local
, bssid
);
1075 ieee80211_sta_tear_down_BA_sessions(sta
);
1078 changed
|= ieee80211_reset_erp_info(sdata
);
1080 ieee80211_led_assoc(local
, 0);
1081 changed
|= BSS_CHANGED_ASSOC
;
1082 sdata
->vif
.bss_conf
.assoc
= false;
1084 ieee80211_set_wmm_default(sdata
);
1086 ieee80211_recalc_idle(local
);
1088 /* channel(_type) changes are handled by ieee80211_hw_config */
1089 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
1091 /* on the next assoc, re-program HT parameters */
1092 sdata
->ht_opmode_valid
= false;
1094 local
->power_constr_level
= 0;
1096 del_timer_sync(&local
->dynamic_ps_timer
);
1097 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1099 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1100 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1101 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1104 ieee80211_hw_config(local
, config_changed
);
1106 /* And the BSSID changed -- not very interesting here */
1107 changed
|= BSS_CHANGED_BSSID
;
1108 ieee80211_bss_info_change_notify(sdata
, changed
);
1112 sta
= sta_info_get(local
, bssid
);
1118 sta_info_unlink(&sta
);
1122 sta_info_destroy(sta
);
1125 static enum rx_mgmt_action __must_check
1126 ieee80211_associate(struct ieee80211_sub_if_data
*sdata
,
1127 struct ieee80211_mgd_work
*wk
)
1129 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1130 struct ieee80211_local
*local
= sdata
->local
;
1133 if (wk
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1134 printk(KERN_DEBUG
"%s: association with AP %pM"
1136 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
);
1139 * Most likely AP is not in the range so remove the
1140 * bss struct for that AP.
1142 cfg80211_unlink_bss(local
->hw
.wiphy
, &wk
->bss
->cbss
);
1145 * We might have a pending scan which had no chance to run yet
1146 * due to work needing to be done. Hence, queue the STAs work
1149 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
1150 return RX_MGMT_CFG80211_ASSOC_TO
;
1153 printk(KERN_DEBUG
"%s: associate with AP %pM (try %d)\n",
1154 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
, wk
->tries
);
1155 ieee80211_send_assoc(sdata
, wk
);
1157 wk
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
1158 run_again(ifmgd
, wk
->timeout
);
1160 return RX_MGMT_NONE
;
1163 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1164 struct ieee80211_hdr
*hdr
)
1167 * We can postpone the mgd.timer whenever receiving unicast frames
1168 * from AP because we know that the connection is working both ways
1169 * at that time. But multicast frames (and hence also beacons) must
1170 * be ignored here, because we need to trigger the timer during
1171 * data idle periods for sending the periodic probe request to the
1172 * AP we're connected to.
1174 if (is_multicast_ether_addr(hdr
->addr1
))
1177 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
1178 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
1181 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1183 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1186 ssid
= ieee80211_bss_get_ie(&ifmgd
->associated
->cbss
, WLAN_EID_SSID
);
1187 ieee80211_send_probe_req(sdata
, ifmgd
->associated
->cbss
.bssid
,
1188 ssid
+ 2, ssid
[1], NULL
, 0);
1190 ifmgd
->probe_send_count
++;
1191 ifmgd
->probe_timeout
= jiffies
+ IEEE80211_PROBE_WAIT
;
1192 run_again(ifmgd
, ifmgd
->probe_timeout
);
1195 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1198 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1199 bool already
= false;
1201 if (!netif_running(sdata
->dev
))
1204 if (sdata
->local
->scanning
)
1207 mutex_lock(&ifmgd
->mtx
);
1209 if (!ifmgd
->associated
)
1212 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1213 if (beacon
&& net_ratelimit())
1214 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1215 "- sending probe request\n", sdata
->dev
->name
);
1219 * The driver/our work has already reported this event or the
1220 * connection monitoring has kicked in and we have already sent
1221 * a probe request. Or maybe the AP died and the driver keeps
1222 * reporting until we disassociate...
1224 * In either case we have to ignore the current call to this
1225 * function (except for setting the correct probe reason bit)
1226 * because otherwise we would reset the timer every time and
1227 * never check whether we received a probe response!
1229 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1230 IEEE80211_STA_CONNECTION_POLL
))
1234 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1236 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1241 mutex_lock(&sdata
->local
->iflist_mtx
);
1242 ieee80211_recalc_ps(sdata
->local
, -1);
1243 mutex_unlock(&sdata
->local
->iflist_mtx
);
1245 ifmgd
->probe_send_count
= 0;
1246 ieee80211_mgd_probe_ap_send(sdata
);
1248 mutex_unlock(&ifmgd
->mtx
);
1251 void ieee80211_beacon_loss_work(struct work_struct
*work
)
1253 struct ieee80211_sub_if_data
*sdata
=
1254 container_of(work
, struct ieee80211_sub_if_data
,
1255 u
.mgd
.beacon_loss_work
);
1257 ieee80211_mgd_probe_ap(sdata
, true);
1260 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1262 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1264 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.beacon_loss_work
);
1266 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1268 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
,
1269 struct ieee80211_mgd_work
*wk
)
1271 wk
->state
= IEEE80211_MGD_STATE_IDLE
;
1272 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1276 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1277 struct ieee80211_mgd_work
*wk
,
1278 struct ieee80211_mgmt
*mgmt
,
1282 struct ieee802_11_elems elems
;
1284 pos
= mgmt
->u
.auth
.variable
;
1285 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1286 if (!elems
.challenge
)
1288 ieee80211_send_auth(sdata
, 3, wk
->auth_alg
,
1289 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1290 wk
->bss
->cbss
.bssid
,
1291 wk
->key
, wk
->key_len
, wk
->key_idx
);
1292 wk
->auth_transaction
= 4;
1295 static enum rx_mgmt_action __must_check
1296 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1297 struct ieee80211_mgd_work
*wk
,
1298 struct ieee80211_mgmt
*mgmt
, size_t len
)
1300 u16 auth_alg
, auth_transaction
, status_code
;
1302 if (wk
->state
!= IEEE80211_MGD_STATE_AUTH
)
1303 return RX_MGMT_NONE
;
1306 return RX_MGMT_NONE
;
1308 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1309 return RX_MGMT_NONE
;
1311 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1312 return RX_MGMT_NONE
;
1314 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1315 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1316 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1318 if (auth_alg
!= wk
->auth_alg
||
1319 auth_transaction
!= wk
->auth_transaction
)
1320 return RX_MGMT_NONE
;
1322 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1323 list_del(&wk
->list
);
1325 return RX_MGMT_CFG80211_AUTH
;
1328 switch (wk
->auth_alg
) {
1329 case WLAN_AUTH_OPEN
:
1330 case WLAN_AUTH_LEAP
:
1332 ieee80211_auth_completed(sdata
, wk
);
1333 return RX_MGMT_CFG80211_AUTH
;
1334 case WLAN_AUTH_SHARED_KEY
:
1335 if (wk
->auth_transaction
== 4) {
1336 ieee80211_auth_completed(sdata
, wk
);
1337 return RX_MGMT_CFG80211_AUTH
;
1339 ieee80211_auth_challenge(sdata
, wk
, mgmt
, len
);
1343 return RX_MGMT_NONE
;
1347 static enum rx_mgmt_action __must_check
1348 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1349 struct ieee80211_mgd_work
*wk
,
1350 struct ieee80211_mgmt
*mgmt
, size_t len
)
1352 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1353 const u8
*bssid
= NULL
;
1357 return RX_MGMT_NONE
;
1359 ASSERT_MGD_MTX(ifmgd
);
1362 bssid
= wk
->bss
->cbss
.bssid
;
1364 bssid
= ifmgd
->associated
->cbss
.bssid
;
1366 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1368 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1369 sdata
->dev
->name
, bssid
, reason_code
);
1372 ieee80211_set_disassoc(sdata
, true);
1374 list_del(&wk
->list
);
1378 return RX_MGMT_CFG80211_DEAUTH
;
1382 static enum rx_mgmt_action __must_check
1383 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1384 struct ieee80211_mgmt
*mgmt
, size_t len
)
1386 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1390 return RX_MGMT_NONE
;
1392 ASSERT_MGD_MTX(ifmgd
);
1394 if (WARN_ON(!ifmgd
->associated
))
1395 return RX_MGMT_NONE
;
1397 if (WARN_ON(memcmp(ifmgd
->associated
->cbss
.bssid
, mgmt
->sa
, ETH_ALEN
)))
1398 return RX_MGMT_NONE
;
1400 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1402 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1403 sdata
->dev
->name
, mgmt
->sa
, reason_code
);
1405 ieee80211_set_disassoc(sdata
, false);
1406 return RX_MGMT_CFG80211_DISASSOC
;
1410 static enum rx_mgmt_action __must_check
1411 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1412 struct ieee80211_mgd_work
*wk
,
1413 struct ieee80211_mgmt
*mgmt
, size_t len
,
1416 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1417 struct ieee80211_local
*local
= sdata
->local
;
1418 struct ieee80211_supported_band
*sband
;
1419 struct sta_info
*sta
;
1420 u32 rates
, basic_rates
;
1421 u16 capab_info
, status_code
, aid
;
1422 struct ieee802_11_elems elems
;
1423 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1427 bool have_higher_than_11mbit
= false, newsta
= false;
1428 u16 ap_ht_cap_flags
;
1431 * AssocResp and ReassocResp have identical structure, so process both
1432 * of them in this function.
1436 return RX_MGMT_NONE
;
1438 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1439 return RX_MGMT_NONE
;
1441 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1442 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1443 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1445 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1446 "status=%d aid=%d)\n",
1447 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1448 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1450 pos
= mgmt
->u
.assoc_resp
.variable
;
1451 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1453 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1454 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1455 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1457 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1458 ms
= tu
* 1024 / 1000;
1459 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1460 "comeback duration %u TU (%u ms)\n",
1461 sdata
->dev
->name
, tu
, ms
);
1462 wk
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
1463 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1464 run_again(ifmgd
, jiffies
+ msecs_to_jiffies(ms
));
1465 return RX_MGMT_NONE
;
1468 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1469 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1470 sdata
->dev
->name
, status_code
);
1471 wk
->state
= IEEE80211_MGD_STATE_IDLE
;
1472 return RX_MGMT_CFG80211_ASSOC
;
1475 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1476 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1477 "set\n", sdata
->dev
->name
, aid
);
1478 aid
&= ~(BIT(15) | BIT(14));
1480 if (!elems
.supp_rates
) {
1481 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1483 return RX_MGMT_NONE
;
1486 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1491 /* Add STA entry for the AP */
1492 sta
= sta_info_get(local
, wk
->bss
->cbss
.bssid
);
1498 sta
= sta_info_alloc(sdata
, wk
->bss
->cbss
.bssid
, GFP_KERNEL
);
1500 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1501 " the AP\n", sdata
->dev
->name
);
1502 return RX_MGMT_NONE
;
1505 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
|
1507 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1508 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1515 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1517 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1518 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1519 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1522 have_higher_than_11mbit
= true;
1524 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1525 if (sband
->bitrates
[j
].bitrate
== rate
) {
1528 basic_rates
|= BIT(j
);
1534 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1535 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1536 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1539 have_higher_than_11mbit
= true;
1541 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1542 if (sband
->bitrates
[j
].bitrate
== rate
) {
1545 basic_rates
|= BIT(j
);
1551 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1552 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1554 /* cf. IEEE 802.11 9.2.12 */
1555 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1556 have_higher_than_11mbit
)
1557 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1559 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1561 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1562 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1563 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1565 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1567 rate_control_rate_init(sta
);
1569 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1570 set_sta_flags(sta
, WLAN_STA_MFP
);
1572 if (elems
.wmm_param
)
1573 set_sta_flags(sta
, WLAN_STA_WME
);
1576 int err
= sta_info_insert(sta
);
1578 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1579 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1581 return RX_MGMT_NONE
;
1587 if (elems
.wmm_param
)
1588 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1589 elems
.wmm_param_len
);
1591 ieee80211_set_wmm_default(sdata
);
1593 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1594 (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
1595 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1596 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1597 wk
->bss
->cbss
.bssid
,
1600 /* delete work item -- must be before set_associated for PS */
1601 list_del(&wk
->list
);
1603 /* set AID and assoc capability,
1604 * ieee80211_set_associated() will tell the driver */
1605 bss_conf
->aid
= aid
;
1606 bss_conf
->assoc_capability
= capab_info
;
1607 /* this will take ownership of wk */
1608 ieee80211_set_associated(sdata
, wk
, changed
);
1611 * Start timer to probe the connection to the AP now.
1612 * Also start the timer that will detect beacon loss.
1614 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1615 mod_beacon_timer(sdata
);
1617 return RX_MGMT_CFG80211_ASSOC
;
1621 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1622 struct ieee80211_mgmt
*mgmt
,
1624 struct ieee80211_rx_status
*rx_status
,
1625 struct ieee802_11_elems
*elems
,
1628 struct ieee80211_local
*local
= sdata
->local
;
1630 struct ieee80211_bss
*bss
;
1631 struct ieee80211_channel
*channel
;
1633 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1634 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1636 freq
= rx_status
->freq
;
1638 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1640 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1643 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1646 ieee80211_rx_bss_put(local
, bss
);
1648 if (!sdata
->u
.mgd
.associated
)
1651 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1652 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->cbss
.bssid
,
1654 struct ieee80211_channel_sw_ie
*sw_elem
=
1655 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1656 ieee80211_sta_process_chanswitch(sdata
, sw_elem
, bss
);
1661 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1662 struct ieee80211_mgd_work
*wk
,
1663 struct ieee80211_mgmt
*mgmt
, size_t len
,
1664 struct ieee80211_rx_status
*rx_status
)
1666 struct ieee80211_if_managed
*ifmgd
;
1668 struct ieee802_11_elems elems
;
1670 ifmgd
= &sdata
->u
.mgd
;
1672 ASSERT_MGD_MTX(ifmgd
);
1674 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1675 return; /* ignore ProbeResp to foreign address */
1677 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1681 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1684 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1686 /* direct probe may be part of the association flow */
1687 if (wk
&& wk
->state
== IEEE80211_MGD_STATE_PROBE
) {
1688 printk(KERN_DEBUG
"%s: direct probe responded\n",
1691 wk
->state
= IEEE80211_MGD_STATE_AUTH
;
1692 WARN_ON(ieee80211_authenticate(sdata
, wk
) != RX_MGMT_NONE
);
1695 if (ifmgd
->associated
&&
1696 memcmp(mgmt
->bssid
, ifmgd
->associated
->cbss
.bssid
, ETH_ALEN
) == 0 &&
1697 ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1698 IEEE80211_STA_CONNECTION_POLL
)) {
1699 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1700 IEEE80211_STA_BEACON_POLL
);
1701 mutex_lock(&sdata
->local
->iflist_mtx
);
1702 ieee80211_recalc_ps(sdata
->local
, -1);
1703 mutex_unlock(&sdata
->local
->iflist_mtx
);
1705 * We've received a probe response, but are not sure whether
1706 * we have or will be receiving any beacons or data, so let's
1707 * schedule the timers again, just in case.
1709 mod_beacon_timer(sdata
);
1710 mod_timer(&ifmgd
->conn_mon_timer
,
1711 round_jiffies_up(jiffies
+
1712 IEEE80211_CONNECTION_IDLE_TIME
));
1717 * This is the canonical list of information elements we care about,
1718 * the filter code also gives us all changes to the Microsoft OUI
1719 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1721 * We implement beacon filtering in software since that means we can
1722 * avoid processing the frame here and in cfg80211, and userspace
1723 * will not be able to tell whether the hardware supports it or not.
1725 * XXX: This list needs to be dynamic -- userspace needs to be able to
1726 * add items it requires. It also needs to be able to tell us to
1727 * look out for other vendor IEs.
1729 static const u64 care_about_ies
=
1730 (1ULL << WLAN_EID_COUNTRY
) |
1731 (1ULL << WLAN_EID_ERP_INFO
) |
1732 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1733 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1734 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1735 (1ULL << WLAN_EID_HT_INFORMATION
);
1737 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1738 struct ieee80211_mgmt
*mgmt
,
1740 struct ieee80211_rx_status
*rx_status
)
1742 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1744 struct ieee802_11_elems elems
;
1745 struct ieee80211_local
*local
= sdata
->local
;
1747 bool erp_valid
, directed_tim
= false;
1752 ASSERT_MGD_MTX(ifmgd
);
1754 /* Process beacon from the current BSS */
1755 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1759 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1763 * We might have received a number of frames, among them a
1764 * disassoc frame and a beacon...
1766 if (!ifmgd
->associated
)
1769 bssid
= ifmgd
->associated
->cbss
.bssid
;
1772 * And in theory even frames from a different AP we were just
1773 * associated to a split-second ago!
1775 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1778 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1779 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1780 if (net_ratelimit()) {
1781 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1782 "to a received beacon\n", sdata
->dev
->name
);
1785 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1786 mutex_lock(&local
->iflist_mtx
);
1787 ieee80211_recalc_ps(local
, -1);
1788 mutex_unlock(&local
->iflist_mtx
);
1792 * Push the beacon loss detection into the future since
1793 * we are processing a beacon from the AP just now.
1795 mod_beacon_timer(sdata
);
1797 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1798 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1799 len
- baselen
, &elems
,
1800 care_about_ies
, ncrc
);
1802 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1803 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1806 if (ncrc
!= ifmgd
->beacon_crc
) {
1807 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1810 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1811 elems
.wmm_param_len
);
1814 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1816 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1817 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1818 ieee80211_hw_config(local
,
1819 IEEE80211_CONF_CHANGE_PS
);
1820 ieee80211_send_nullfunc(local
, sdata
, 0);
1822 local
->pspolling
= true;
1825 * Here is assumed that the driver will be
1826 * able to send ps-poll frame and receive a
1827 * response even though power save mode is
1828 * enabled, but some drivers might require
1829 * to disable power save here. This needs
1830 * to be investigated.
1832 ieee80211_send_pspoll(local
, sdata
);
1837 if (ncrc
== ifmgd
->beacon_crc
)
1839 ifmgd
->beacon_crc
= ncrc
;
1841 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1843 erp_value
= elems
.erp_info
[0];
1847 changed
|= ieee80211_handle_bss_capability(sdata
,
1848 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1849 erp_valid
, erp_value
);
1852 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1853 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1854 struct sta_info
*sta
;
1855 struct ieee80211_supported_band
*sband
;
1856 u16 ap_ht_cap_flags
;
1860 sta
= sta_info_get(local
, bssid
);
1861 if (WARN_ON(!sta
)) {
1866 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1868 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1869 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1871 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1875 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1876 bssid
, ap_ht_cap_flags
);
1879 /* Note: country IE parsing is done for us by cfg80211 */
1880 if (elems
.country_elem
) {
1881 /* TODO: IBSS also needs this */
1882 if (elems
.pwr_constr_elem
)
1883 ieee80211_handle_pwr_constr(sdata
,
1884 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1885 elems
.pwr_constr_elem
,
1886 elems
.pwr_constr_elem_len
);
1889 ieee80211_bss_info_change_notify(sdata
, changed
);
1892 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
1893 struct sk_buff
*skb
)
1895 struct ieee80211_local
*local
= sdata
->local
;
1896 struct ieee80211_mgmt
*mgmt
;
1900 return RX_DROP_MONITOR
;
1902 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1903 fc
= le16_to_cpu(mgmt
->frame_control
);
1905 switch (fc
& IEEE80211_FCTL_STYPE
) {
1906 case IEEE80211_STYPE_PROBE_RESP
:
1907 case IEEE80211_STYPE_BEACON
:
1908 case IEEE80211_STYPE_AUTH
:
1909 case IEEE80211_STYPE_ASSOC_RESP
:
1910 case IEEE80211_STYPE_REASSOC_RESP
:
1911 case IEEE80211_STYPE_DEAUTH
:
1912 case IEEE80211_STYPE_DISASSOC
:
1913 case IEEE80211_STYPE_ACTION
:
1914 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
1915 ieee80211_queue_work(&local
->hw
, &sdata
->u
.mgd
.work
);
1919 return RX_DROP_MONITOR
;
1922 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1923 struct sk_buff
*skb
)
1925 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1926 struct ieee80211_rx_status
*rx_status
;
1927 struct ieee80211_mgmt
*mgmt
;
1928 struct ieee80211_mgd_work
*wk
;
1929 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1932 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1933 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1934 fc
= le16_to_cpu(mgmt
->frame_control
);
1936 mutex_lock(&ifmgd
->mtx
);
1938 if (ifmgd
->associated
&&
1939 memcmp(ifmgd
->associated
->cbss
.bssid
, mgmt
->bssid
,
1941 switch (fc
& IEEE80211_FCTL_STYPE
) {
1942 case IEEE80211_STYPE_BEACON
:
1943 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1946 case IEEE80211_STYPE_PROBE_RESP
:
1947 ieee80211_rx_mgmt_probe_resp(sdata
, NULL
, mgmt
,
1948 skb
->len
, rx_status
);
1950 case IEEE80211_STYPE_DEAUTH
:
1951 rma
= ieee80211_rx_mgmt_deauth(sdata
, NULL
,
1954 case IEEE80211_STYPE_DISASSOC
:
1955 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1957 case IEEE80211_STYPE_ACTION
:
1958 /* XXX: differentiate, can only happen for CSA now! */
1959 ieee80211_sta_process_chanswitch(sdata
,
1960 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1964 mutex_unlock(&ifmgd
->mtx
);
1970 case RX_MGMT_CFG80211_DEAUTH
:
1971 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1973 case RX_MGMT_CFG80211_DISASSOC
:
1974 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1977 WARN(1, "unexpected: %d", rma
);
1982 list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
1983 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1986 switch (fc
& IEEE80211_FCTL_STYPE
) {
1987 case IEEE80211_STYPE_PROBE_RESP
:
1988 ieee80211_rx_mgmt_probe_resp(sdata
, wk
, mgmt
, skb
->len
,
1991 case IEEE80211_STYPE_AUTH
:
1992 rma
= ieee80211_rx_mgmt_auth(sdata
, wk
, mgmt
, skb
->len
);
1994 case IEEE80211_STYPE_ASSOC_RESP
:
1995 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, wk
, mgmt
,
1998 case IEEE80211_STYPE_REASSOC_RESP
:
1999 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, wk
, mgmt
,
2002 case IEEE80211_STYPE_DEAUTH
:
2003 rma
= ieee80211_rx_mgmt_deauth(sdata
, wk
, mgmt
,
2008 * We've processed this frame for that work, so it can't
2009 * belong to another work struct.
2010 * NB: this is also required for correctness because the
2011 * called functions can free 'wk', and for 'rma'!
2016 mutex_unlock(&ifmgd
->mtx
);
2022 case RX_MGMT_CFG80211_AUTH
:
2023 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
2025 case RX_MGMT_CFG80211_ASSOC
:
2026 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
2028 case RX_MGMT_CFG80211_DEAUTH
:
2029 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2032 WARN(1, "unexpected: %d", rma
);
2039 static void ieee80211_sta_timer(unsigned long data
)
2041 struct ieee80211_sub_if_data
*sdata
=
2042 (struct ieee80211_sub_if_data
*) data
;
2043 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2044 struct ieee80211_local
*local
= sdata
->local
;
2046 if (local
->quiescing
) {
2047 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2051 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
2054 static void ieee80211_sta_work(struct work_struct
*work
)
2056 struct ieee80211_sub_if_data
*sdata
=
2057 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
2058 struct ieee80211_local
*local
= sdata
->local
;
2059 struct ieee80211_if_managed
*ifmgd
;
2060 struct sk_buff
*skb
;
2061 struct ieee80211_mgd_work
*wk
, *tmp
;
2062 LIST_HEAD(free_work
);
2063 enum rx_mgmt_action rma
;
2064 bool anybusy
= false;
2066 if (!netif_running(sdata
->dev
))
2069 if (local
->scanning
)
2072 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2076 * ieee80211_queue_work() should have picked up most cases,
2077 * here we'll pick the the rest.
2079 if (WARN(local
->suspended
, "STA MLME work scheduled while "
2080 "going to suspend\n"))
2083 ifmgd
= &sdata
->u
.mgd
;
2085 /* first process frames to avoid timing out while a frame is pending */
2086 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
2087 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2089 /* then process the rest of the work */
2090 mutex_lock(&ifmgd
->mtx
);
2092 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2093 IEEE80211_STA_CONNECTION_POLL
) &&
2094 ifmgd
->associated
) {
2097 memcpy(bssid
, ifmgd
->associated
->cbss
.bssid
, ETH_ALEN
);
2098 if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2099 run_again(ifmgd
, ifmgd
->probe_timeout
);
2101 else if (ifmgd
->probe_send_count
< IEEE80211_MAX_PROBE_TRIES
) {
2102 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2103 printk(KERN_DEBUG
"No probe response from AP %pM"
2104 " after %dms, try %d\n", bssid
,
2105 (1000 * IEEE80211_PROBE_WAIT
)/HZ
,
2106 ifmgd
->probe_send_count
);
2108 ieee80211_mgd_probe_ap_send(sdata
);
2111 * We actually lost the connection ... or did we?
2114 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2115 IEEE80211_STA_BEACON_POLL
);
2116 printk(KERN_DEBUG
"No probe response from AP %pM"
2117 " after %dms, disconnecting.\n",
2118 bssid
, (1000 * IEEE80211_PROBE_WAIT
)/HZ
);
2119 ieee80211_set_disassoc(sdata
, true);
2120 mutex_unlock(&ifmgd
->mtx
);
2122 * must be outside lock due to cfg80211,
2123 * but that's not a problem.
2125 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2126 IEEE80211_STYPE_DEAUTH
,
2127 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2129 mutex_lock(&ifmgd
->mtx
);
2134 ieee80211_recalc_idle(local
);
2136 list_for_each_entry_safe(wk
, tmp
, &ifmgd
->work_list
, list
) {
2137 if (time_is_after_jiffies(wk
->timeout
)) {
2139 * This work item isn't supposed to be worked on
2140 * right now, but take care to adjust the timer
2143 run_again(ifmgd
, wk
->timeout
);
2147 switch (wk
->state
) {
2151 case IEEE80211_MGD_STATE_IDLE
:
2155 case IEEE80211_MGD_STATE_PROBE
:
2156 rma
= ieee80211_direct_probe(sdata
, wk
);
2158 case IEEE80211_MGD_STATE_AUTH
:
2159 rma
= ieee80211_authenticate(sdata
, wk
);
2161 case IEEE80211_MGD_STATE_ASSOC
:
2162 rma
= ieee80211_associate(sdata
, wk
);
2168 /* no action required */
2170 case RX_MGMT_CFG80211_AUTH_TO
:
2171 case RX_MGMT_CFG80211_ASSOC_TO
:
2172 list_del(&wk
->list
);
2173 list_add(&wk
->list
, &free_work
);
2174 wk
->tries
= rma
; /* small abuse but only local */
2177 WARN(1, "unexpected: %d", rma
);
2181 list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
2182 if (wk
->state
!= IEEE80211_MGD_STATE_IDLE
) {
2188 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifmgd
->request
))
2189 ieee80211_queue_delayed_work(&local
->hw
,
2191 round_jiffies_relative(0));
2193 mutex_unlock(&ifmgd
->mtx
);
2195 list_for_each_entry_safe(wk
, tmp
, &free_work
, list
) {
2196 switch (wk
->tries
) {
2197 case RX_MGMT_CFG80211_AUTH_TO
:
2198 cfg80211_send_auth_timeout(sdata
->dev
,
2199 wk
->bss
->cbss
.bssid
);
2201 case RX_MGMT_CFG80211_ASSOC_TO
:
2202 cfg80211_send_assoc_timeout(sdata
->dev
,
2203 wk
->bss
->cbss
.bssid
);
2206 WARN(1, "unexpected: %d", wk
->tries
);
2209 list_del(&wk
->list
);
2213 ieee80211_recalc_idle(local
);
2216 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2218 struct ieee80211_sub_if_data
*sdata
=
2219 (struct ieee80211_sub_if_data
*) data
;
2220 struct ieee80211_local
*local
= sdata
->local
;
2222 if (local
->quiescing
)
2225 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.beacon_loss_work
);
2228 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2230 struct ieee80211_sub_if_data
*sdata
=
2231 (struct ieee80211_sub_if_data
*) data
;
2232 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2233 struct ieee80211_local
*local
= sdata
->local
;
2235 if (local
->quiescing
)
2238 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2241 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2243 struct ieee80211_sub_if_data
*sdata
=
2244 container_of(work
, struct ieee80211_sub_if_data
,
2245 u
.mgd
.monitor_work
);
2247 ieee80211_mgd_probe_ap(sdata
, false);
2250 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2252 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2253 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2254 IEEE80211_STA_CONNECTION_POLL
);
2256 /* let's probe the connection once */
2257 ieee80211_queue_work(&sdata
->local
->hw
,
2258 &sdata
->u
.mgd
.monitor_work
);
2259 /* and do all the other regular work too */
2260 ieee80211_queue_work(&sdata
->local
->hw
,
2261 &sdata
->u
.mgd
.work
);
2266 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2268 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2271 * we need to use atomic bitops for the running bits
2272 * only because both timers might fire at the same
2273 * time -- the code here is properly synchronised.
2276 cancel_work_sync(&ifmgd
->work
);
2277 cancel_work_sync(&ifmgd
->beacon_loss_work
);
2278 if (del_timer_sync(&ifmgd
->timer
))
2279 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2281 cancel_work_sync(&ifmgd
->chswitch_work
);
2282 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2283 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2285 cancel_work_sync(&ifmgd
->monitor_work
);
2286 /* these will just be re-established on connection */
2287 del_timer_sync(&ifmgd
->conn_mon_timer
);
2288 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2291 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2293 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2295 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2296 add_timer(&ifmgd
->timer
);
2297 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2298 add_timer(&ifmgd
->chswitch_timer
);
2302 /* interface setup */
2303 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2305 struct ieee80211_if_managed
*ifmgd
;
2307 ifmgd
= &sdata
->u
.mgd
;
2308 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
2309 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2310 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2311 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
2312 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2313 (unsigned long) sdata
);
2314 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2315 (unsigned long) sdata
);
2316 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2317 (unsigned long) sdata
);
2318 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2319 (unsigned long) sdata
);
2320 skb_queue_head_init(&ifmgd
->skb_queue
);
2322 INIT_LIST_HEAD(&ifmgd
->work_list
);
2324 ifmgd
->capab
= WLAN_CAPABILITY_ESS
;
2326 if (sdata
->local
->hw
.queues
>= 4)
2327 ifmgd
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2329 mutex_init(&ifmgd
->mtx
);
2332 /* scan finished notification */
2333 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2335 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2337 /* Restart STA timers */
2339 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2340 ieee80211_restart_sta_timer(sdata
);
2344 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2345 unsigned long data
, void *dummy
)
2347 s32 latency_usec
= (s32
) data
;
2348 struct ieee80211_local
*local
=
2349 container_of(nb
, struct ieee80211_local
,
2350 network_latency_notifier
);
2352 mutex_lock(&local
->iflist_mtx
);
2353 ieee80211_recalc_ps(local
, latency_usec
);
2354 mutex_unlock(&local
->iflist_mtx
);
2360 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2361 struct cfg80211_auth_request
*req
)
2363 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2365 struct ieee80211_mgd_work
*wk
;
2368 switch (req
->auth_type
) {
2369 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2370 auth_alg
= WLAN_AUTH_OPEN
;
2372 case NL80211_AUTHTYPE_SHARED_KEY
:
2373 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2375 case NL80211_AUTHTYPE_FT
:
2376 auth_alg
= WLAN_AUTH_FT
;
2378 case NL80211_AUTHTYPE_NETWORK_EAP
:
2379 auth_alg
= WLAN_AUTH_LEAP
;
2385 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2389 wk
->bss
= (void *)req
->bss
;
2391 if (req
->ie
&& req
->ie_len
) {
2392 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2393 wk
->ie_len
= req
->ie_len
;
2396 if (req
->key
&& req
->key_len
) {
2397 wk
->key_len
= req
->key_len
;
2398 wk
->key_idx
= req
->key_idx
;
2399 memcpy(wk
->key
, req
->key
, req
->key_len
);
2402 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2403 memcpy(wk
->ssid
, ssid
+ 2, ssid
[1]);
2404 wk
->ssid_len
= ssid
[1];
2406 wk
->state
= IEEE80211_MGD_STATE_PROBE
;
2407 wk
->auth_alg
= auth_alg
;
2408 wk
->timeout
= jiffies
; /* run right away */
2411 * XXX: if still associated need to tell AP that we're going
2412 * to sleep and then change channel etc.
2414 sdata
->local
->oper_channel
= req
->bss
->channel
;
2415 ieee80211_hw_config(sdata
->local
, 0);
2417 mutex_lock(&ifmgd
->mtx
);
2418 list_add(&wk
->list
, &sdata
->u
.mgd
.work_list
);
2419 mutex_unlock(&ifmgd
->mtx
);
2421 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.work
);
2425 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2426 struct cfg80211_assoc_request
*req
)
2428 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2429 struct ieee80211_mgd_work
*wk
, *found
= NULL
;
2432 mutex_lock(&ifmgd
->mtx
);
2434 list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
2435 if (&wk
->bss
->cbss
== req
->bss
&&
2436 wk
->state
== IEEE80211_MGD_STATE_IDLE
) {
2447 list_del(&found
->list
);
2449 wk
= krealloc(found
, sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2451 list_add(&found
->list
, &ifmgd
->work_list
);
2456 list_add(&wk
->list
, &ifmgd
->work_list
);
2458 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2460 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2461 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2462 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2463 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2464 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2466 sdata
->local
->oper_channel
= req
->bss
->channel
;
2467 ieee80211_hw_config(sdata
->local
, 0);
2469 if (req
->ie
&& req
->ie_len
) {
2470 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2471 wk
->ie_len
= req
->ie_len
;
2475 if (req
->prev_bssid
)
2476 memcpy(wk
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2478 wk
->state
= IEEE80211_MGD_STATE_ASSOC
;
2480 wk
->timeout
= jiffies
; /* run right away */
2483 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2484 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2486 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2487 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2490 if (req
->crypto
.control_port
)
2491 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2493 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2495 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.work
);
2500 mutex_unlock(&ifmgd
->mtx
);
2504 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2505 struct cfg80211_deauth_request
*req
,
2508 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2509 struct ieee80211_mgd_work
*wk
;
2510 const u8
*bssid
= NULL
;
2511 bool not_auth_yet
= false;
2513 mutex_lock(&ifmgd
->mtx
);
2515 if (ifmgd
->associated
&& &ifmgd
->associated
->cbss
== req
->bss
) {
2516 bssid
= req
->bss
->bssid
;
2517 ieee80211_set_disassoc(sdata
, true);
2518 } else list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
2519 if (&wk
->bss
->cbss
== req
->bss
) {
2520 bssid
= req
->bss
->bssid
;
2521 if (wk
->state
== IEEE80211_MGD_STATE_PROBE
)
2522 not_auth_yet
= true;
2523 list_del(&wk
->list
);
2530 * If somebody requests authentication and we haven't
2531 * sent out an auth frame yet there's no need to send
2532 * out a deauth frame either. If the state was PROBE,
2533 * then this is the case. If it's AUTH we have sent a
2534 * frame, and if it's IDLE we have completed the auth
2538 mutex_unlock(&ifmgd
->mtx
);
2539 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2544 * cfg80211 should catch this ... but it's racy since
2545 * we can receive a deauth frame, process it, hand it
2546 * to cfg80211 while that's in a locked section already
2547 * trying to tell us that the user wants to disconnect.
2550 mutex_unlock(&ifmgd
->mtx
);
2554 mutex_unlock(&ifmgd
->mtx
);
2556 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2557 sdata
->dev
->name
, bssid
, req
->reason_code
);
2559 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2560 IEEE80211_STYPE_DEAUTH
, req
->reason_code
,
2566 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2567 struct cfg80211_disassoc_request
*req
,
2570 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2572 mutex_lock(&ifmgd
->mtx
);
2575 * cfg80211 should catch this ... but it's racy since
2576 * we can receive a disassoc frame, process it, hand it
2577 * to cfg80211 while that's in a locked section already
2578 * trying to tell us that the user wants to disconnect.
2580 if (&ifmgd
->associated
->cbss
!= req
->bss
) {
2581 mutex_unlock(&ifmgd
->mtx
);
2585 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2586 sdata
->dev
->name
, req
->bss
->bssid
, req
->reason_code
);
2588 ieee80211_set_disassoc(sdata
, false);
2590 mutex_unlock(&ifmgd
->mtx
);
2592 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2593 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,