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
);
919 * Always handle WMM once after association regardless
920 * of the first value the AP uses. Setting -1 here has
921 * that effect because the AP values is an unsigned
924 sdata
->u
.mgd
.wmm_last_param_set
= -1;
926 ieee80211_led_assoc(local
, 1);
928 sdata
->vif
.bss_conf
.assoc
= 1;
930 * For now just always ask the driver to update the basic rateset
931 * when we have associated, we aren't checking whether it actually
934 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
936 /* And the BSSID changed - we're associated now */
937 bss_info_changed
|= BSS_CHANGED_BSSID
;
939 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
941 mutex_lock(&local
->iflist_mtx
);
942 ieee80211_recalc_ps(local
, -1);
943 mutex_unlock(&local
->iflist_mtx
);
945 netif_tx_start_all_queues(sdata
->dev
);
946 netif_carrier_on(sdata
->dev
);
949 static enum rx_mgmt_action __must_check
950 ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
,
951 struct ieee80211_mgd_work
*wk
)
953 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
954 struct ieee80211_local
*local
= sdata
->local
;
957 if (wk
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
958 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
959 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
);
962 * Most likely AP is not in the range so remove the
963 * bss struct for that AP.
965 cfg80211_unlink_bss(local
->hw
.wiphy
, &wk
->bss
->cbss
);
968 * We might have a pending scan which had no chance to run yet
969 * due to work needing to be done. Hence, queue the STAs work
972 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
973 return RX_MGMT_CFG80211_AUTH_TO
;
976 printk(KERN_DEBUG
"%s: direct probe to AP %pM (try %d)\n",
977 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
,
981 * Direct probe is sent to broadcast address as some APs
982 * will not answer to direct packet in unassociated state.
984 ieee80211_send_probe_req(sdata
, NULL
, wk
->ssid
, wk
->ssid_len
, NULL
, 0);
986 wk
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
987 run_again(ifmgd
, wk
->timeout
);
993 static enum rx_mgmt_action __must_check
994 ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
,
995 struct ieee80211_mgd_work
*wk
)
997 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
998 struct ieee80211_local
*local
= sdata
->local
;
1001 if (wk
->tries
> IEEE80211_AUTH_MAX_TRIES
) {
1002 printk(KERN_DEBUG
"%s: authentication with AP %pM"
1004 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
);
1007 * Most likely AP is not in the range so remove the
1008 * bss struct for that AP.
1010 cfg80211_unlink_bss(local
->hw
.wiphy
, &wk
->bss
->cbss
);
1013 * We might have a pending scan which had no chance to run yet
1014 * due to work needing to be done. Hence, queue the STAs work
1017 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
1018 return RX_MGMT_CFG80211_AUTH_TO
;
1021 printk(KERN_DEBUG
"%s: authenticate with AP %pM (try %d)\n",
1022 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
, wk
->tries
);
1024 ieee80211_send_auth(sdata
, 1, wk
->auth_alg
, wk
->ie
, wk
->ie_len
,
1025 wk
->bss
->cbss
.bssid
, NULL
, 0, 0);
1026 wk
->auth_transaction
= 2;
1028 wk
->timeout
= jiffies
+ IEEE80211_AUTH_TIMEOUT
;
1029 run_again(ifmgd
, wk
->timeout
);
1031 return RX_MGMT_NONE
;
1034 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1037 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1038 struct ieee80211_local
*local
= sdata
->local
;
1039 struct sta_info
*sta
;
1040 u32 changed
= 0, config_changed
= 0;
1043 ASSERT_MGD_MTX(ifmgd
);
1045 if (WARN_ON(!ifmgd
->associated
))
1048 memcpy(bssid
, ifmgd
->associated
->cbss
.bssid
, ETH_ALEN
);
1050 ifmgd
->associated
= NULL
;
1051 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
1054 kfree(ifmgd
->old_associate_work
);
1055 ifmgd
->old_associate_work
= NULL
;
1057 struct ieee80211_mgd_work
*wk
= ifmgd
->old_associate_work
;
1059 wk
->state
= IEEE80211_MGD_STATE_IDLE
;
1060 list_add(&wk
->list
, &ifmgd
->work_list
);
1064 * we need to commit the associated = NULL change because the
1065 * scan code uses that to determine whether this iface should
1066 * go to/wake up from powersave or not -- and could otherwise
1067 * wake the queues erroneously.
1072 * Thus, we can only afterwards stop the queues -- to account
1073 * for the case where another CPU is finishing a scan at this
1074 * time -- we don't want the scan code to enable queues.
1077 netif_tx_stop_all_queues(sdata
->dev
);
1078 netif_carrier_off(sdata
->dev
);
1081 sta
= sta_info_get(local
, bssid
);
1083 ieee80211_sta_tear_down_BA_sessions(sta
);
1086 changed
|= ieee80211_reset_erp_info(sdata
);
1088 ieee80211_led_assoc(local
, 0);
1089 changed
|= BSS_CHANGED_ASSOC
;
1090 sdata
->vif
.bss_conf
.assoc
= false;
1092 ieee80211_set_wmm_default(sdata
);
1094 /* channel(_type) changes are handled by ieee80211_hw_config */
1095 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
1097 /* on the next assoc, re-program HT parameters */
1098 sdata
->ht_opmode_valid
= false;
1100 local
->power_constr_level
= 0;
1102 del_timer_sync(&local
->dynamic_ps_timer
);
1103 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1105 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1106 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1107 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1110 ieee80211_hw_config(local
, config_changed
);
1112 /* And the BSSID changed -- not very interesting here */
1113 changed
|= BSS_CHANGED_BSSID
;
1114 ieee80211_bss_info_change_notify(sdata
, changed
);
1118 sta
= sta_info_get(local
, bssid
);
1124 sta_info_unlink(&sta
);
1128 sta_info_destroy(sta
);
1131 static enum rx_mgmt_action __must_check
1132 ieee80211_associate(struct ieee80211_sub_if_data
*sdata
,
1133 struct ieee80211_mgd_work
*wk
)
1135 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1136 struct ieee80211_local
*local
= sdata
->local
;
1139 if (wk
->tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1140 printk(KERN_DEBUG
"%s: association with AP %pM"
1142 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
);
1145 * Most likely AP is not in the range so remove the
1146 * bss struct for that AP.
1148 cfg80211_unlink_bss(local
->hw
.wiphy
, &wk
->bss
->cbss
);
1151 * We might have a pending scan which had no chance to run yet
1152 * due to work needing to be done. Hence, queue the STAs work
1155 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
1156 return RX_MGMT_CFG80211_ASSOC_TO
;
1159 printk(KERN_DEBUG
"%s: associate with AP %pM (try %d)\n",
1160 sdata
->dev
->name
, wk
->bss
->cbss
.bssid
, wk
->tries
);
1161 ieee80211_send_assoc(sdata
, wk
);
1163 wk
->timeout
= jiffies
+ IEEE80211_ASSOC_TIMEOUT
;
1164 run_again(ifmgd
, wk
->timeout
);
1166 return RX_MGMT_NONE
;
1169 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1170 struct ieee80211_hdr
*hdr
)
1173 * We can postpone the mgd.timer whenever receiving unicast frames
1174 * from AP because we know that the connection is working both ways
1175 * at that time. But multicast frames (and hence also beacons) must
1176 * be ignored here, because we need to trigger the timer during
1177 * data idle periods for sending the periodic probe request to the
1178 * AP we're connected to.
1180 if (is_multicast_ether_addr(hdr
->addr1
))
1183 mod_timer(&sdata
->u
.mgd
.conn_mon_timer
,
1184 round_jiffies_up(jiffies
+ IEEE80211_CONNECTION_IDLE_TIME
));
1187 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data
*sdata
)
1189 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1192 ssid
= ieee80211_bss_get_ie(&ifmgd
->associated
->cbss
, WLAN_EID_SSID
);
1193 ieee80211_send_probe_req(sdata
, ifmgd
->associated
->cbss
.bssid
,
1194 ssid
+ 2, ssid
[1], NULL
, 0);
1196 ifmgd
->probe_send_count
++;
1197 ifmgd
->probe_timeout
= jiffies
+ IEEE80211_PROBE_WAIT
;
1198 run_again(ifmgd
, ifmgd
->probe_timeout
);
1201 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data
*sdata
,
1204 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1205 bool already
= false;
1207 if (!netif_running(sdata
->dev
))
1210 if (sdata
->local
->scanning
)
1213 mutex_lock(&ifmgd
->mtx
);
1215 if (!ifmgd
->associated
)
1218 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1219 if (beacon
&& net_ratelimit())
1220 printk(KERN_DEBUG
"%s: detected beacon loss from AP "
1221 "- sending probe request\n", sdata
->dev
->name
);
1225 * The driver/our work has already reported this event or the
1226 * connection monitoring has kicked in and we have already sent
1227 * a probe request. Or maybe the AP died and the driver keeps
1228 * reporting until we disassociate...
1230 * In either case we have to ignore the current call to this
1231 * function (except for setting the correct probe reason bit)
1232 * because otherwise we would reset the timer every time and
1233 * never check whether we received a probe response!
1235 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1236 IEEE80211_STA_CONNECTION_POLL
))
1240 ifmgd
->flags
|= IEEE80211_STA_BEACON_POLL
;
1242 ifmgd
->flags
|= IEEE80211_STA_CONNECTION_POLL
;
1247 mutex_lock(&sdata
->local
->iflist_mtx
);
1248 ieee80211_recalc_ps(sdata
->local
, -1);
1249 mutex_unlock(&sdata
->local
->iflist_mtx
);
1251 ifmgd
->probe_send_count
= 0;
1252 ieee80211_mgd_probe_ap_send(sdata
);
1254 mutex_unlock(&ifmgd
->mtx
);
1257 void ieee80211_beacon_loss_work(struct work_struct
*work
)
1259 struct ieee80211_sub_if_data
*sdata
=
1260 container_of(work
, struct ieee80211_sub_if_data
,
1261 u
.mgd
.beacon_loss_work
);
1263 ieee80211_mgd_probe_ap(sdata
, true);
1266 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1268 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1270 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.beacon_loss_work
);
1272 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1274 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
,
1275 struct ieee80211_mgd_work
*wk
)
1277 wk
->state
= IEEE80211_MGD_STATE_IDLE
;
1278 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1282 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1283 struct ieee80211_mgd_work
*wk
,
1284 struct ieee80211_mgmt
*mgmt
,
1288 struct ieee802_11_elems elems
;
1290 pos
= mgmt
->u
.auth
.variable
;
1291 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1292 if (!elems
.challenge
)
1294 ieee80211_send_auth(sdata
, 3, wk
->auth_alg
,
1295 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1296 wk
->bss
->cbss
.bssid
,
1297 wk
->key
, wk
->key_len
, wk
->key_idx
);
1298 wk
->auth_transaction
= 4;
1301 static enum rx_mgmt_action __must_check
1302 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1303 struct ieee80211_mgd_work
*wk
,
1304 struct ieee80211_mgmt
*mgmt
, size_t len
)
1306 u16 auth_alg
, auth_transaction
, status_code
;
1308 if (wk
->state
!= IEEE80211_MGD_STATE_AUTH
)
1309 return RX_MGMT_NONE
;
1312 return RX_MGMT_NONE
;
1314 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1315 return RX_MGMT_NONE
;
1317 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1318 return RX_MGMT_NONE
;
1320 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1321 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1322 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1324 if (auth_alg
!= wk
->auth_alg
||
1325 auth_transaction
!= wk
->auth_transaction
)
1326 return RX_MGMT_NONE
;
1328 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1329 list_del(&wk
->list
);
1331 return RX_MGMT_CFG80211_AUTH
;
1334 switch (wk
->auth_alg
) {
1335 case WLAN_AUTH_OPEN
:
1336 case WLAN_AUTH_LEAP
:
1338 ieee80211_auth_completed(sdata
, wk
);
1339 return RX_MGMT_CFG80211_AUTH
;
1340 case WLAN_AUTH_SHARED_KEY
:
1341 if (wk
->auth_transaction
== 4) {
1342 ieee80211_auth_completed(sdata
, wk
);
1343 return RX_MGMT_CFG80211_AUTH
;
1345 ieee80211_auth_challenge(sdata
, wk
, mgmt
, len
);
1349 return RX_MGMT_NONE
;
1353 static enum rx_mgmt_action __must_check
1354 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1355 struct ieee80211_mgd_work
*wk
,
1356 struct ieee80211_mgmt
*mgmt
, size_t len
)
1358 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1359 const u8
*bssid
= NULL
;
1363 return RX_MGMT_NONE
;
1365 ASSERT_MGD_MTX(ifmgd
);
1368 bssid
= wk
->bss
->cbss
.bssid
;
1370 bssid
= ifmgd
->associated
->cbss
.bssid
;
1372 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1374 printk(KERN_DEBUG
"%s: deauthenticated from %pM (Reason: %u)\n",
1375 sdata
->dev
->name
, bssid
, reason_code
);
1378 ieee80211_set_disassoc(sdata
, true);
1379 ieee80211_recalc_idle(sdata
->local
);
1381 list_del(&wk
->list
);
1385 return RX_MGMT_CFG80211_DEAUTH
;
1389 static enum rx_mgmt_action __must_check
1390 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1391 struct ieee80211_mgmt
*mgmt
, size_t len
)
1393 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1397 return RX_MGMT_NONE
;
1399 ASSERT_MGD_MTX(ifmgd
);
1401 if (WARN_ON(!ifmgd
->associated
))
1402 return RX_MGMT_NONE
;
1404 if (WARN_ON(memcmp(ifmgd
->associated
->cbss
.bssid
, mgmt
->sa
, ETH_ALEN
)))
1405 return RX_MGMT_NONE
;
1407 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1409 printk(KERN_DEBUG
"%s: disassociated from %pM (Reason: %u)\n",
1410 sdata
->dev
->name
, mgmt
->sa
, reason_code
);
1412 ieee80211_set_disassoc(sdata
, false);
1413 ieee80211_recalc_idle(sdata
->local
);
1414 return RX_MGMT_CFG80211_DISASSOC
;
1418 static enum rx_mgmt_action __must_check
1419 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1420 struct ieee80211_mgd_work
*wk
,
1421 struct ieee80211_mgmt
*mgmt
, size_t len
,
1424 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1425 struct ieee80211_local
*local
= sdata
->local
;
1426 struct ieee80211_supported_band
*sband
;
1427 struct sta_info
*sta
;
1428 u32 rates
, basic_rates
;
1429 u16 capab_info
, status_code
, aid
;
1430 struct ieee802_11_elems elems
;
1431 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1435 bool have_higher_than_11mbit
= false, newsta
= false;
1436 u16 ap_ht_cap_flags
;
1439 * AssocResp and ReassocResp have identical structure, so process both
1440 * of them in this function.
1444 return RX_MGMT_NONE
;
1446 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1447 return RX_MGMT_NONE
;
1449 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1450 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1451 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1453 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1454 "status=%d aid=%d)\n",
1455 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1456 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1458 pos
= mgmt
->u
.assoc_resp
.variable
;
1459 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1461 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1462 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1463 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1465 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1466 ms
= tu
* 1024 / 1000;
1467 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1468 "comeback duration %u TU (%u ms)\n",
1469 sdata
->dev
->name
, tu
, ms
);
1470 wk
->timeout
= jiffies
+ msecs_to_jiffies(ms
);
1471 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1472 run_again(ifmgd
, jiffies
+ msecs_to_jiffies(ms
));
1473 return RX_MGMT_NONE
;
1476 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1477 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1478 sdata
->dev
->name
, status_code
);
1479 wk
->state
= IEEE80211_MGD_STATE_IDLE
;
1480 return RX_MGMT_CFG80211_ASSOC
;
1483 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1484 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1485 "set\n", sdata
->dev
->name
, aid
);
1486 aid
&= ~(BIT(15) | BIT(14));
1488 if (!elems
.supp_rates
) {
1489 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1491 return RX_MGMT_NONE
;
1494 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1499 /* Add STA entry for the AP */
1500 sta
= sta_info_get(local
, wk
->bss
->cbss
.bssid
);
1506 sta
= sta_info_alloc(sdata
, wk
->bss
->cbss
.bssid
, GFP_KERNEL
);
1508 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1509 " the AP\n", sdata
->dev
->name
);
1510 return RX_MGMT_NONE
;
1513 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
|
1515 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1516 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1523 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1525 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1526 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1527 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1530 have_higher_than_11mbit
= true;
1532 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1533 if (sband
->bitrates
[j
].bitrate
== rate
) {
1536 basic_rates
|= BIT(j
);
1542 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1543 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1544 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1547 have_higher_than_11mbit
= true;
1549 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1550 if (sband
->bitrates
[j
].bitrate
== rate
) {
1553 basic_rates
|= BIT(j
);
1559 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1560 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1562 /* cf. IEEE 802.11 9.2.12 */
1563 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1564 have_higher_than_11mbit
)
1565 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1567 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1569 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1570 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1571 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1573 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1575 rate_control_rate_init(sta
);
1577 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1578 set_sta_flags(sta
, WLAN_STA_MFP
);
1580 if (elems
.wmm_param
)
1581 set_sta_flags(sta
, WLAN_STA_WME
);
1584 int err
= sta_info_insert(sta
);
1586 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1587 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1589 return RX_MGMT_NONE
;
1595 if (elems
.wmm_param
)
1596 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1597 elems
.wmm_param_len
);
1599 ieee80211_set_wmm_default(sdata
);
1601 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1602 (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
1603 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
))
1604 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1605 wk
->bss
->cbss
.bssid
,
1608 /* delete work item -- must be before set_associated for PS */
1609 list_del(&wk
->list
);
1611 /* set AID and assoc capability,
1612 * ieee80211_set_associated() will tell the driver */
1613 bss_conf
->aid
= aid
;
1614 bss_conf
->assoc_capability
= capab_info
;
1615 /* this will take ownership of wk */
1616 ieee80211_set_associated(sdata
, wk
, changed
);
1619 * Start timer to probe the connection to the AP now.
1620 * Also start the timer that will detect beacon loss.
1622 ieee80211_sta_rx_notify(sdata
, (struct ieee80211_hdr
*)mgmt
);
1623 mod_beacon_timer(sdata
);
1625 return RX_MGMT_CFG80211_ASSOC
;
1629 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1630 struct ieee80211_mgmt
*mgmt
,
1632 struct ieee80211_rx_status
*rx_status
,
1633 struct ieee802_11_elems
*elems
,
1636 struct ieee80211_local
*local
= sdata
->local
;
1638 struct ieee80211_bss
*bss
;
1639 struct ieee80211_channel
*channel
;
1641 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1642 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1644 freq
= rx_status
->freq
;
1646 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1648 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1651 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1654 ieee80211_rx_bss_put(local
, bss
);
1656 if (!sdata
->u
.mgd
.associated
)
1659 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1660 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.associated
->cbss
.bssid
,
1662 struct ieee80211_channel_sw_ie
*sw_elem
=
1663 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1664 ieee80211_sta_process_chanswitch(sdata
, sw_elem
, bss
);
1669 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1670 struct ieee80211_mgd_work
*wk
,
1671 struct ieee80211_mgmt
*mgmt
, size_t len
,
1672 struct ieee80211_rx_status
*rx_status
)
1674 struct ieee80211_if_managed
*ifmgd
;
1676 struct ieee802_11_elems elems
;
1678 ifmgd
= &sdata
->u
.mgd
;
1680 ASSERT_MGD_MTX(ifmgd
);
1682 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1683 return; /* ignore ProbeResp to foreign address */
1685 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1689 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1692 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1694 /* direct probe may be part of the association flow */
1695 if (wk
&& wk
->state
== IEEE80211_MGD_STATE_PROBE
) {
1696 printk(KERN_DEBUG
"%s: direct probe responded\n",
1699 wk
->state
= IEEE80211_MGD_STATE_AUTH
;
1700 WARN_ON(ieee80211_authenticate(sdata
, wk
) != RX_MGMT_NONE
);
1703 if (ifmgd
->associated
&&
1704 memcmp(mgmt
->bssid
, ifmgd
->associated
->cbss
.bssid
, ETH_ALEN
) == 0 &&
1705 ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
1706 IEEE80211_STA_CONNECTION_POLL
)) {
1707 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
1708 IEEE80211_STA_BEACON_POLL
);
1709 mutex_lock(&sdata
->local
->iflist_mtx
);
1710 ieee80211_recalc_ps(sdata
->local
, -1);
1711 mutex_unlock(&sdata
->local
->iflist_mtx
);
1713 * We've received a probe response, but are not sure whether
1714 * we have or will be receiving any beacons or data, so let's
1715 * schedule the timers again, just in case.
1717 mod_beacon_timer(sdata
);
1718 mod_timer(&ifmgd
->conn_mon_timer
,
1719 round_jiffies_up(jiffies
+
1720 IEEE80211_CONNECTION_IDLE_TIME
));
1725 * This is the canonical list of information elements we care about,
1726 * the filter code also gives us all changes to the Microsoft OUI
1727 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1729 * We implement beacon filtering in software since that means we can
1730 * avoid processing the frame here and in cfg80211, and userspace
1731 * will not be able to tell whether the hardware supports it or not.
1733 * XXX: This list needs to be dynamic -- userspace needs to be able to
1734 * add items it requires. It also needs to be able to tell us to
1735 * look out for other vendor IEs.
1737 static const u64 care_about_ies
=
1738 (1ULL << WLAN_EID_COUNTRY
) |
1739 (1ULL << WLAN_EID_ERP_INFO
) |
1740 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1741 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1742 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1743 (1ULL << WLAN_EID_HT_INFORMATION
);
1745 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1746 struct ieee80211_mgmt
*mgmt
,
1748 struct ieee80211_rx_status
*rx_status
)
1750 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1752 struct ieee802_11_elems elems
;
1753 struct ieee80211_local
*local
= sdata
->local
;
1755 bool erp_valid
, directed_tim
= false;
1760 ASSERT_MGD_MTX(ifmgd
);
1762 /* Process beacon from the current BSS */
1763 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1767 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1771 * We might have received a number of frames, among them a
1772 * disassoc frame and a beacon...
1774 if (!ifmgd
->associated
)
1777 bssid
= ifmgd
->associated
->cbss
.bssid
;
1780 * And in theory even frames from a different AP we were just
1781 * associated to a split-second ago!
1783 if (memcmp(bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1786 if (ifmgd
->flags
& IEEE80211_STA_BEACON_POLL
) {
1787 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1788 if (net_ratelimit()) {
1789 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1790 "to a received beacon\n", sdata
->dev
->name
);
1793 ifmgd
->flags
&= ~IEEE80211_STA_BEACON_POLL
;
1794 mutex_lock(&local
->iflist_mtx
);
1795 ieee80211_recalc_ps(local
, -1);
1796 mutex_unlock(&local
->iflist_mtx
);
1800 * Push the beacon loss detection into the future since
1801 * we are processing a beacon from the AP just now.
1803 mod_beacon_timer(sdata
);
1805 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1806 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1807 len
- baselen
, &elems
,
1808 care_about_ies
, ncrc
);
1810 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1811 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1814 if (ncrc
!= ifmgd
->beacon_crc
) {
1815 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1818 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1819 elems
.wmm_param_len
);
1822 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1824 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1825 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1826 ieee80211_hw_config(local
,
1827 IEEE80211_CONF_CHANGE_PS
);
1828 ieee80211_send_nullfunc(local
, sdata
, 0);
1830 local
->pspolling
= true;
1833 * Here is assumed that the driver will be
1834 * able to send ps-poll frame and receive a
1835 * response even though power save mode is
1836 * enabled, but some drivers might require
1837 * to disable power save here. This needs
1838 * to be investigated.
1840 ieee80211_send_pspoll(local
, sdata
);
1845 if (ncrc
== ifmgd
->beacon_crc
)
1847 ifmgd
->beacon_crc
= ncrc
;
1849 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1851 erp_value
= elems
.erp_info
[0];
1855 changed
|= ieee80211_handle_bss_capability(sdata
,
1856 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1857 erp_valid
, erp_value
);
1860 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1861 !(ifmgd
->flags
& IEEE80211_STA_DISABLE_11N
)) {
1862 struct sta_info
*sta
;
1863 struct ieee80211_supported_band
*sband
;
1864 u16 ap_ht_cap_flags
;
1868 sta
= sta_info_get(local
, bssid
);
1869 if (WARN_ON(!sta
)) {
1874 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1876 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1877 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1879 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1883 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1884 bssid
, ap_ht_cap_flags
);
1887 /* Note: country IE parsing is done for us by cfg80211 */
1888 if (elems
.country_elem
) {
1889 /* TODO: IBSS also needs this */
1890 if (elems
.pwr_constr_elem
)
1891 ieee80211_handle_pwr_constr(sdata
,
1892 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1893 elems
.pwr_constr_elem
,
1894 elems
.pwr_constr_elem_len
);
1897 ieee80211_bss_info_change_notify(sdata
, changed
);
1900 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
1901 struct sk_buff
*skb
)
1903 struct ieee80211_local
*local
= sdata
->local
;
1904 struct ieee80211_mgmt
*mgmt
;
1908 return RX_DROP_MONITOR
;
1910 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1911 fc
= le16_to_cpu(mgmt
->frame_control
);
1913 switch (fc
& IEEE80211_FCTL_STYPE
) {
1914 case IEEE80211_STYPE_PROBE_RESP
:
1915 case IEEE80211_STYPE_BEACON
:
1916 case IEEE80211_STYPE_AUTH
:
1917 case IEEE80211_STYPE_ASSOC_RESP
:
1918 case IEEE80211_STYPE_REASSOC_RESP
:
1919 case IEEE80211_STYPE_DEAUTH
:
1920 case IEEE80211_STYPE_DISASSOC
:
1921 case IEEE80211_STYPE_ACTION
:
1922 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
1923 ieee80211_queue_work(&local
->hw
, &sdata
->u
.mgd
.work
);
1927 return RX_DROP_MONITOR
;
1930 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1931 struct sk_buff
*skb
)
1933 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1934 struct ieee80211_rx_status
*rx_status
;
1935 struct ieee80211_mgmt
*mgmt
;
1936 struct ieee80211_mgd_work
*wk
;
1937 enum rx_mgmt_action rma
= RX_MGMT_NONE
;
1940 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1941 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1942 fc
= le16_to_cpu(mgmt
->frame_control
);
1944 mutex_lock(&ifmgd
->mtx
);
1946 if (ifmgd
->associated
&&
1947 memcmp(ifmgd
->associated
->cbss
.bssid
, mgmt
->bssid
,
1949 switch (fc
& IEEE80211_FCTL_STYPE
) {
1950 case IEEE80211_STYPE_BEACON
:
1951 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1954 case IEEE80211_STYPE_PROBE_RESP
:
1955 ieee80211_rx_mgmt_probe_resp(sdata
, NULL
, mgmt
,
1956 skb
->len
, rx_status
);
1958 case IEEE80211_STYPE_DEAUTH
:
1959 rma
= ieee80211_rx_mgmt_deauth(sdata
, NULL
,
1962 case IEEE80211_STYPE_DISASSOC
:
1963 rma
= ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1965 case IEEE80211_STYPE_ACTION
:
1966 if (mgmt
->u
.action
.category
!= WLAN_CATEGORY_SPECTRUM_MGMT
)
1969 ieee80211_sta_process_chanswitch(sdata
,
1970 &mgmt
->u
.action
.u
.chan_switch
.sw_elem
,
1974 mutex_unlock(&ifmgd
->mtx
);
1980 case RX_MGMT_CFG80211_DEAUTH
:
1981 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1983 case RX_MGMT_CFG80211_DISASSOC
:
1984 cfg80211_send_disassoc(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
1987 WARN(1, "unexpected: %d", rma
);
1992 list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
1993 if (memcmp(wk
->bss
->cbss
.bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1996 switch (fc
& IEEE80211_FCTL_STYPE
) {
1997 case IEEE80211_STYPE_PROBE_RESP
:
1998 ieee80211_rx_mgmt_probe_resp(sdata
, wk
, mgmt
, skb
->len
,
2001 case IEEE80211_STYPE_AUTH
:
2002 rma
= ieee80211_rx_mgmt_auth(sdata
, wk
, mgmt
, skb
->len
);
2004 case IEEE80211_STYPE_ASSOC_RESP
:
2005 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, wk
, mgmt
,
2008 case IEEE80211_STYPE_REASSOC_RESP
:
2009 rma
= ieee80211_rx_mgmt_assoc_resp(sdata
, wk
, mgmt
,
2012 case IEEE80211_STYPE_DEAUTH
:
2013 rma
= ieee80211_rx_mgmt_deauth(sdata
, wk
, mgmt
,
2018 * We've processed this frame for that work, so it can't
2019 * belong to another work struct.
2020 * NB: this is also required for correctness because the
2021 * called functions can free 'wk', and for 'rma'!
2026 mutex_unlock(&ifmgd
->mtx
);
2032 case RX_MGMT_CFG80211_AUTH
:
2033 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
2035 case RX_MGMT_CFG80211_ASSOC
:
2036 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
2038 case RX_MGMT_CFG80211_DEAUTH
:
2039 cfg80211_send_deauth(sdata
->dev
, (u8
*)mgmt
, skb
->len
);
2042 WARN(1, "unexpected: %d", rma
);
2049 static void ieee80211_sta_timer(unsigned long data
)
2051 struct ieee80211_sub_if_data
*sdata
=
2052 (struct ieee80211_sub_if_data
*) data
;
2053 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2054 struct ieee80211_local
*local
= sdata
->local
;
2056 if (local
->quiescing
) {
2057 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2061 ieee80211_queue_work(&local
->hw
, &ifmgd
->work
);
2064 static void ieee80211_sta_work(struct work_struct
*work
)
2066 struct ieee80211_sub_if_data
*sdata
=
2067 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
2068 struct ieee80211_local
*local
= sdata
->local
;
2069 struct ieee80211_if_managed
*ifmgd
;
2070 struct sk_buff
*skb
;
2071 struct ieee80211_mgd_work
*wk
, *tmp
;
2072 LIST_HEAD(free_work
);
2073 enum rx_mgmt_action rma
;
2074 bool anybusy
= false;
2076 if (!netif_running(sdata
->dev
))
2079 if (local
->scanning
)
2082 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2086 * ieee80211_queue_work() should have picked up most cases,
2087 * here we'll pick the the rest.
2089 if (WARN(local
->suspended
, "STA MLME work scheduled while "
2090 "going to suspend\n"))
2093 ifmgd
= &sdata
->u
.mgd
;
2095 /* first process frames to avoid timing out while a frame is pending */
2096 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
2097 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2099 /* then process the rest of the work */
2100 mutex_lock(&ifmgd
->mtx
);
2102 if (ifmgd
->flags
& (IEEE80211_STA_BEACON_POLL
|
2103 IEEE80211_STA_CONNECTION_POLL
) &&
2104 ifmgd
->associated
) {
2107 memcpy(bssid
, ifmgd
->associated
->cbss
.bssid
, ETH_ALEN
);
2108 if (time_is_after_jiffies(ifmgd
->probe_timeout
))
2109 run_again(ifmgd
, ifmgd
->probe_timeout
);
2111 else if (ifmgd
->probe_send_count
< IEEE80211_MAX_PROBE_TRIES
) {
2112 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2113 printk(KERN_DEBUG
"No probe response from AP %pM"
2114 " after %dms, try %d\n", bssid
,
2115 (1000 * IEEE80211_PROBE_WAIT
)/HZ
,
2116 ifmgd
->probe_send_count
);
2118 ieee80211_mgd_probe_ap_send(sdata
);
2121 * We actually lost the connection ... or did we?
2124 ifmgd
->flags
&= ~(IEEE80211_STA_CONNECTION_POLL
|
2125 IEEE80211_STA_BEACON_POLL
);
2126 printk(KERN_DEBUG
"No probe response from AP %pM"
2127 " after %dms, disconnecting.\n",
2128 bssid
, (1000 * IEEE80211_PROBE_WAIT
)/HZ
);
2129 ieee80211_set_disassoc(sdata
, true);
2130 ieee80211_recalc_idle(local
);
2131 mutex_unlock(&ifmgd
->mtx
);
2133 * must be outside lock due to cfg80211,
2134 * but that's not a problem.
2136 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2137 IEEE80211_STYPE_DEAUTH
,
2138 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
,
2140 mutex_lock(&ifmgd
->mtx
);
2145 ieee80211_recalc_idle(local
);
2147 list_for_each_entry_safe(wk
, tmp
, &ifmgd
->work_list
, list
) {
2148 if (time_is_after_jiffies(wk
->timeout
)) {
2150 * This work item isn't supposed to be worked on
2151 * right now, but take care to adjust the timer
2154 run_again(ifmgd
, wk
->timeout
);
2158 switch (wk
->state
) {
2162 case IEEE80211_MGD_STATE_IDLE
:
2166 case IEEE80211_MGD_STATE_PROBE
:
2167 rma
= ieee80211_direct_probe(sdata
, wk
);
2169 case IEEE80211_MGD_STATE_AUTH
:
2170 rma
= ieee80211_authenticate(sdata
, wk
);
2172 case IEEE80211_MGD_STATE_ASSOC
:
2173 rma
= ieee80211_associate(sdata
, wk
);
2179 /* no action required */
2181 case RX_MGMT_CFG80211_AUTH_TO
:
2182 case RX_MGMT_CFG80211_ASSOC_TO
:
2183 list_del(&wk
->list
);
2184 list_add(&wk
->list
, &free_work
);
2185 wk
->tries
= rma
; /* small abuse but only local */
2188 WARN(1, "unexpected: %d", rma
);
2192 list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
2193 if (wk
->state
!= IEEE80211_MGD_STATE_IDLE
) {
2199 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifmgd
->request
))
2200 ieee80211_queue_delayed_work(&local
->hw
,
2202 round_jiffies_relative(0));
2204 mutex_unlock(&ifmgd
->mtx
);
2206 list_for_each_entry_safe(wk
, tmp
, &free_work
, list
) {
2207 switch (wk
->tries
) {
2208 case RX_MGMT_CFG80211_AUTH_TO
:
2209 cfg80211_send_auth_timeout(sdata
->dev
,
2210 wk
->bss
->cbss
.bssid
);
2212 case RX_MGMT_CFG80211_ASSOC_TO
:
2213 cfg80211_send_assoc_timeout(sdata
->dev
,
2214 wk
->bss
->cbss
.bssid
);
2217 WARN(1, "unexpected: %d", wk
->tries
);
2220 list_del(&wk
->list
);
2224 ieee80211_recalc_idle(local
);
2227 static void ieee80211_sta_bcn_mon_timer(unsigned long data
)
2229 struct ieee80211_sub_if_data
*sdata
=
2230 (struct ieee80211_sub_if_data
*) data
;
2231 struct ieee80211_local
*local
= sdata
->local
;
2233 if (local
->quiescing
)
2236 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.beacon_loss_work
);
2239 static void ieee80211_sta_conn_mon_timer(unsigned long data
)
2241 struct ieee80211_sub_if_data
*sdata
=
2242 (struct ieee80211_sub_if_data
*) data
;
2243 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2244 struct ieee80211_local
*local
= sdata
->local
;
2246 if (local
->quiescing
)
2249 ieee80211_queue_work(&local
->hw
, &ifmgd
->monitor_work
);
2252 static void ieee80211_sta_monitor_work(struct work_struct
*work
)
2254 struct ieee80211_sub_if_data
*sdata
=
2255 container_of(work
, struct ieee80211_sub_if_data
,
2256 u
.mgd
.monitor_work
);
2258 ieee80211_mgd_probe_ap(sdata
, false);
2261 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2263 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2264 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_BEACON_POLL
|
2265 IEEE80211_STA_CONNECTION_POLL
);
2267 /* let's probe the connection once */
2268 ieee80211_queue_work(&sdata
->local
->hw
,
2269 &sdata
->u
.mgd
.monitor_work
);
2270 /* and do all the other regular work too */
2271 ieee80211_queue_work(&sdata
->local
->hw
,
2272 &sdata
->u
.mgd
.work
);
2277 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2279 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2282 * we need to use atomic bitops for the running bits
2283 * only because both timers might fire at the same
2284 * time -- the code here is properly synchronised.
2287 cancel_work_sync(&ifmgd
->work
);
2288 cancel_work_sync(&ifmgd
->beacon_loss_work
);
2289 if (del_timer_sync(&ifmgd
->timer
))
2290 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2292 cancel_work_sync(&ifmgd
->chswitch_work
);
2293 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2294 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2296 cancel_work_sync(&ifmgd
->monitor_work
);
2297 /* these will just be re-established on connection */
2298 del_timer_sync(&ifmgd
->conn_mon_timer
);
2299 del_timer_sync(&ifmgd
->bcn_mon_timer
);
2302 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2304 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2306 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2307 add_timer(&ifmgd
->timer
);
2308 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2309 add_timer(&ifmgd
->chswitch_timer
);
2313 /* interface setup */
2314 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2316 struct ieee80211_if_managed
*ifmgd
;
2318 ifmgd
= &sdata
->u
.mgd
;
2319 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
2320 INIT_WORK(&ifmgd
->monitor_work
, ieee80211_sta_monitor_work
);
2321 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2322 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
2323 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2324 (unsigned long) sdata
);
2325 setup_timer(&ifmgd
->bcn_mon_timer
, ieee80211_sta_bcn_mon_timer
,
2326 (unsigned long) sdata
);
2327 setup_timer(&ifmgd
->conn_mon_timer
, ieee80211_sta_conn_mon_timer
,
2328 (unsigned long) sdata
);
2329 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2330 (unsigned long) sdata
);
2331 skb_queue_head_init(&ifmgd
->skb_queue
);
2333 INIT_LIST_HEAD(&ifmgd
->work_list
);
2335 ifmgd
->capab
= WLAN_CAPABILITY_ESS
;
2337 if (sdata
->local
->hw
.queues
>= 4)
2338 ifmgd
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2340 mutex_init(&ifmgd
->mtx
);
2343 /* scan finished notification */
2344 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2346 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2348 /* Restart STA timers */
2350 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2351 ieee80211_restart_sta_timer(sdata
);
2355 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2356 unsigned long data
, void *dummy
)
2358 s32 latency_usec
= (s32
) data
;
2359 struct ieee80211_local
*local
=
2360 container_of(nb
, struct ieee80211_local
,
2361 network_latency_notifier
);
2363 mutex_lock(&local
->iflist_mtx
);
2364 ieee80211_recalc_ps(local
, latency_usec
);
2365 mutex_unlock(&local
->iflist_mtx
);
2371 int ieee80211_mgd_auth(struct ieee80211_sub_if_data
*sdata
,
2372 struct cfg80211_auth_request
*req
)
2374 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2376 struct ieee80211_mgd_work
*wk
;
2379 switch (req
->auth_type
) {
2380 case NL80211_AUTHTYPE_OPEN_SYSTEM
:
2381 auth_alg
= WLAN_AUTH_OPEN
;
2383 case NL80211_AUTHTYPE_SHARED_KEY
:
2384 auth_alg
= WLAN_AUTH_SHARED_KEY
;
2386 case NL80211_AUTHTYPE_FT
:
2387 auth_alg
= WLAN_AUTH_FT
;
2389 case NL80211_AUTHTYPE_NETWORK_EAP
:
2390 auth_alg
= WLAN_AUTH_LEAP
;
2396 wk
= kzalloc(sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2400 wk
->bss
= (void *)req
->bss
;
2402 if (req
->ie
&& req
->ie_len
) {
2403 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2404 wk
->ie_len
= req
->ie_len
;
2407 if (req
->key
&& req
->key_len
) {
2408 wk
->key_len
= req
->key_len
;
2409 wk
->key_idx
= req
->key_idx
;
2410 memcpy(wk
->key
, req
->key
, req
->key_len
);
2413 ssid
= ieee80211_bss_get_ie(req
->bss
, WLAN_EID_SSID
);
2414 memcpy(wk
->ssid
, ssid
+ 2, ssid
[1]);
2415 wk
->ssid_len
= ssid
[1];
2417 wk
->state
= IEEE80211_MGD_STATE_PROBE
;
2418 wk
->auth_alg
= auth_alg
;
2419 wk
->timeout
= jiffies
; /* run right away */
2422 * XXX: if still associated need to tell AP that we're going
2423 * to sleep and then change channel etc.
2425 sdata
->local
->oper_channel
= req
->bss
->channel
;
2426 ieee80211_hw_config(sdata
->local
, 0);
2428 mutex_lock(&ifmgd
->mtx
);
2429 list_add(&wk
->list
, &sdata
->u
.mgd
.work_list
);
2430 mutex_unlock(&ifmgd
->mtx
);
2432 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.work
);
2436 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data
*sdata
,
2437 struct cfg80211_assoc_request
*req
)
2439 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2440 struct ieee80211_mgd_work
*wk
, *found
= NULL
;
2443 mutex_lock(&ifmgd
->mtx
);
2445 list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
2446 if (&wk
->bss
->cbss
== req
->bss
&&
2447 wk
->state
== IEEE80211_MGD_STATE_IDLE
) {
2458 list_del(&found
->list
);
2460 wk
= krealloc(found
, sizeof(*wk
) + req
->ie_len
, GFP_KERNEL
);
2462 list_add(&found
->list
, &ifmgd
->work_list
);
2467 list_add(&wk
->list
, &ifmgd
->work_list
);
2469 ifmgd
->flags
&= ~IEEE80211_STA_DISABLE_11N
;
2471 for (i
= 0; i
< req
->crypto
.n_ciphers_pairwise
; i
++)
2472 if (req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP40
||
2473 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_TKIP
||
2474 req
->crypto
.ciphers_pairwise
[i
] == WLAN_CIPHER_SUITE_WEP104
)
2475 ifmgd
->flags
|= IEEE80211_STA_DISABLE_11N
;
2477 sdata
->local
->oper_channel
= req
->bss
->channel
;
2478 ieee80211_hw_config(sdata
->local
, 0);
2480 if (req
->ie
&& req
->ie_len
) {
2481 memcpy(wk
->ie
, req
->ie
, req
->ie_len
);
2482 wk
->ie_len
= req
->ie_len
;
2486 if (req
->prev_bssid
)
2487 memcpy(wk
->prev_bssid
, req
->prev_bssid
, ETH_ALEN
);
2489 wk
->state
= IEEE80211_MGD_STATE_ASSOC
;
2491 wk
->timeout
= jiffies
; /* run right away */
2494 ifmgd
->mfp
= IEEE80211_MFP_REQUIRED
;
2495 ifmgd
->flags
|= IEEE80211_STA_MFP_ENABLED
;
2497 ifmgd
->mfp
= IEEE80211_MFP_DISABLED
;
2498 ifmgd
->flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2501 if (req
->crypto
.control_port
)
2502 ifmgd
->flags
|= IEEE80211_STA_CONTROL_PORT
;
2504 ifmgd
->flags
&= ~IEEE80211_STA_CONTROL_PORT
;
2506 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->u
.mgd
.work
);
2511 mutex_unlock(&ifmgd
->mtx
);
2515 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data
*sdata
,
2516 struct cfg80211_deauth_request
*req
,
2519 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2520 struct ieee80211_mgd_work
*wk
;
2521 const u8
*bssid
= NULL
;
2522 bool not_auth_yet
= false;
2524 mutex_lock(&ifmgd
->mtx
);
2526 if (ifmgd
->associated
&& &ifmgd
->associated
->cbss
== req
->bss
) {
2527 bssid
= req
->bss
->bssid
;
2528 ieee80211_set_disassoc(sdata
, true);
2529 } else list_for_each_entry(wk
, &ifmgd
->work_list
, list
) {
2530 if (&wk
->bss
->cbss
== req
->bss
) {
2531 bssid
= req
->bss
->bssid
;
2532 if (wk
->state
== IEEE80211_MGD_STATE_PROBE
)
2533 not_auth_yet
= true;
2534 list_del(&wk
->list
);
2541 * If somebody requests authentication and we haven't
2542 * sent out an auth frame yet there's no need to send
2543 * out a deauth frame either. If the state was PROBE,
2544 * then this is the case. If it's AUTH we have sent a
2545 * frame, and if it's IDLE we have completed the auth
2549 mutex_unlock(&ifmgd
->mtx
);
2550 __cfg80211_auth_canceled(sdata
->dev
, bssid
);
2555 * cfg80211 should catch this ... but it's racy since
2556 * we can receive a deauth frame, process it, hand it
2557 * to cfg80211 while that's in a locked section already
2558 * trying to tell us that the user wants to disconnect.
2561 mutex_unlock(&ifmgd
->mtx
);
2565 mutex_unlock(&ifmgd
->mtx
);
2567 printk(KERN_DEBUG
"%s: deauthenticating from %pM by local choice (reason=%d)\n",
2568 sdata
->dev
->name
, bssid
, req
->reason_code
);
2570 ieee80211_send_deauth_disassoc(sdata
, bssid
,
2571 IEEE80211_STYPE_DEAUTH
, req
->reason_code
,
2574 ieee80211_recalc_idle(sdata
->local
);
2579 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data
*sdata
,
2580 struct cfg80211_disassoc_request
*req
,
2583 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2585 mutex_lock(&ifmgd
->mtx
);
2588 * cfg80211 should catch this ... but it's racy since
2589 * we can receive a disassoc frame, process it, hand it
2590 * to cfg80211 while that's in a locked section already
2591 * trying to tell us that the user wants to disconnect.
2593 if (&ifmgd
->associated
->cbss
!= req
->bss
) {
2594 mutex_unlock(&ifmgd
->mtx
);
2598 printk(KERN_DEBUG
"%s: disassociating from %pM by local choice (reason=%d)\n",
2599 sdata
->dev
->name
, req
->bss
->bssid
, req
->reason_code
);
2601 ieee80211_set_disassoc(sdata
, false);
2603 mutex_unlock(&ifmgd
->mtx
);
2605 ieee80211_send_deauth_disassoc(sdata
, req
->bss
->bssid
,
2606 IEEE80211_STYPE_DISASSOC
, req
->reason_code
,
2609 ieee80211_recalc_idle(sdata
->local
);