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_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_WAIT (HZ / 20)
37 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
40 #define TMR_RUNNING_TIMER 0
41 #define TMR_RUNNING_CHANSW 1
44 static int ecw2cw(int ecw
)
46 return (1 << ecw
) - 1;
49 static u8
*ieee80211_bss_get_ie(struct ieee80211_bss
*bss
, u8 ie
)
53 pos
= bss
->cbss
.information_elements
;
56 end
= pos
+ bss
->cbss
.len_information_elements
;
58 while (pos
+ 1 < end
) {
59 if (pos
+ 2 + pos
[1] > end
)
69 static int ieee80211_compatible_rates(struct ieee80211_bss
*bss
,
70 struct ieee80211_supported_band
*sband
,
76 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
77 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
79 for (j
= 0; j
< sband
->n_bitrates
; j
++)
80 if (sband
->bitrates
[j
].bitrate
== rate
) {
91 * ieee80211_enable_ht should be called only after the operating band
92 * has been determined as ht configuration depends on the hw's
93 * HT abilities for a specific band.
95 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
96 struct ieee80211_ht_info
*hti
,
99 struct ieee80211_local
*local
= sdata
->local
;
100 struct ieee80211_supported_band
*sband
;
101 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
102 struct sta_info
*sta
;
105 bool enable_ht
= true, ht_changed
;
106 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
108 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
110 /* HT is not supported */
111 if (!sband
->ht_cap
.ht_supported
)
114 /* check that channel matches the right operating channel */
115 if (local
->hw
.conf
.channel
->center_freq
!=
116 ieee80211_channel_to_frequency(hti
->control_chan
))
120 channel_type
= NL80211_CHAN_HT20
;
122 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
123 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
124 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
125 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
127 if (!(local
->hw
.conf
.channel
->flags
&
128 IEEE80211_CHAN_NO_HT40PLUS
))
129 channel_type
= NL80211_CHAN_HT40PLUS
;
131 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
132 if (!(local
->hw
.conf
.channel
->flags
&
133 IEEE80211_CHAN_NO_HT40MINUS
))
134 channel_type
= NL80211_CHAN_HT40MINUS
;
140 ht_changed
= conf_is_ht(&local
->hw
.conf
) != enable_ht
||
141 channel_type
!= local
->hw
.conf
.channel_type
;
143 local
->oper_channel_type
= channel_type
;
146 /* channel_type change automatically detected */
147 ieee80211_hw_config(local
, 0);
151 sta
= sta_info_get(local
, ifmgd
->bssid
);
153 rate_control_rate_update(local
, sband
, sta
,
154 IEEE80211_RC_HT_CHANGED
);
163 ht_opmode
= le16_to_cpu(hti
->operation_mode
);
165 /* if bss configuration changed store the new one */
166 if (!sdata
->ht_opmode_valid
||
167 sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
168 changed
|= BSS_CHANGED_HT
;
169 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
170 sdata
->ht_opmode_valid
= true;
176 /* frame sending functions */
178 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
180 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
181 struct ieee80211_local
*local
= sdata
->local
;
183 struct ieee80211_mgmt
*mgmt
;
184 u8
*pos
, *ies
, *ht_ie
;
185 int i
, len
, count
, rates_len
, supp_rates_len
;
187 struct ieee80211_bss
*bss
;
189 struct ieee80211_supported_band
*sband
;
192 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
193 sizeof(*mgmt
) + 200 + ifmgd
->extra_ie_len
+
196 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
197 "frame\n", sdata
->dev
->name
);
200 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
202 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
204 capab
= ifmgd
->capab
;
206 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
207 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
208 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
209 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
210 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
213 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
214 local
->hw
.conf
.channel
->center_freq
,
215 ifmgd
->ssid
, ifmgd
->ssid_len
);
217 if (bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
)
218 capab
|= WLAN_CAPABILITY_PRIVACY
;
222 /* get all rates supported by the device and the AP as
223 * some APs don't like getting a superset of their rates
224 * in the association request (e.g. D-Link DAP 1353 in
226 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
228 if ((bss
->cbss
.capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
229 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
230 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
232 ieee80211_rx_bss_put(local
, bss
);
235 rates_len
= sband
->n_bitrates
;
238 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
240 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
241 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
242 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
244 if (ifmgd
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
246 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
247 IEEE80211_STYPE_REASSOC_REQ
);
248 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
249 mgmt
->u
.reassoc_req
.listen_interval
=
250 cpu_to_le16(local
->hw
.conf
.listen_interval
);
251 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifmgd
->prev_bssid
,
255 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
256 IEEE80211_STYPE_ASSOC_REQ
);
257 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
258 mgmt
->u
.assoc_req
.listen_interval
=
259 cpu_to_le16(local
->hw
.conf
.listen_interval
);
263 ies
= pos
= skb_put(skb
, 2 + ifmgd
->ssid_len
);
264 *pos
++ = WLAN_EID_SSID
;
265 *pos
++ = ifmgd
->ssid_len
;
266 memcpy(pos
, ifmgd
->ssid
, ifmgd
->ssid_len
);
268 /* add all rates which were marked to be used above */
269 supp_rates_len
= rates_len
;
270 if (supp_rates_len
> 8)
273 len
= sband
->n_bitrates
;
274 pos
= skb_put(skb
, supp_rates_len
+ 2);
275 *pos
++ = WLAN_EID_SUPP_RATES
;
276 *pos
++ = supp_rates_len
;
279 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
280 if (BIT(i
) & rates
) {
281 int rate
= sband
->bitrates
[i
].bitrate
;
282 *pos
++ = (u8
) (rate
/ 5);
288 if (rates_len
> count
) {
289 pos
= skb_put(skb
, rates_len
- count
+ 2);
290 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
291 *pos
++ = rates_len
- count
;
293 for (i
++; i
< sband
->n_bitrates
; i
++) {
294 if (BIT(i
) & rates
) {
295 int rate
= sband
->bitrates
[i
].bitrate
;
296 *pos
++ = (u8
) (rate
/ 5);
301 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
302 /* 1. power capabilities */
303 pos
= skb_put(skb
, 4);
304 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
306 *pos
++ = 0; /* min tx power */
307 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
309 /* 2. supported channels */
310 /* TODO: get this in reg domain format */
311 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
312 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
313 *pos
++ = 2 * sband
->n_channels
;
314 for (i
= 0; i
< sband
->n_channels
; i
++) {
315 *pos
++ = ieee80211_frequency_to_channel(
316 sband
->channels
[i
].center_freq
);
317 *pos
++ = 1; /* one channel in the subband*/
321 if (ifmgd
->extra_ie
) {
322 pos
= skb_put(skb
, ifmgd
->extra_ie_len
);
323 memcpy(pos
, ifmgd
->extra_ie
, ifmgd
->extra_ie_len
);
326 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
327 pos
= skb_put(skb
, 9);
328 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
329 *pos
++ = 7; /* len */
330 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
333 *pos
++ = 2; /* WME */
334 *pos
++ = 0; /* WME info */
335 *pos
++ = 1; /* WME ver */
339 /* wmm support is a must to HT */
341 * IEEE802.11n does not allow TKIP/WEP as pairwise
342 * ciphers in HT mode. We still associate in non-ht
343 * mode (11a/b/g) if any one of these ciphers is
344 * configured as pairwise.
346 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
347 sband
->ht_cap
.ht_supported
&&
348 (ht_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_INFORMATION
)) &&
349 ht_ie
[1] >= sizeof(struct ieee80211_ht_info
) &&
350 (!(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))) {
351 struct ieee80211_ht_info
*ht_info
=
352 (struct ieee80211_ht_info
*)(ht_ie
+ 2);
353 u16 cap
= sband
->ht_cap
.cap
;
355 u32 flags
= local
->hw
.conf
.channel
->flags
;
357 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
358 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
359 if (flags
& IEEE80211_CHAN_NO_HT40PLUS
) {
360 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
361 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
364 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
365 if (flags
& IEEE80211_CHAN_NO_HT40MINUS
) {
366 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
367 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
372 tmp
= cpu_to_le16(cap
);
373 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
374 *pos
++ = WLAN_EID_HT_CAPABILITY
;
375 *pos
++ = sizeof(struct ieee80211_ht_cap
);
376 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
377 memcpy(pos
, &tmp
, sizeof(u16
));
379 /* TODO: needs a define here for << 2 */
380 *pos
++ = sband
->ht_cap
.ampdu_factor
|
381 (sband
->ht_cap
.ampdu_density
<< 2);
382 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
385 kfree(ifmgd
->assocreq_ies
);
386 ifmgd
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
387 ifmgd
->assocreq_ies
= kmalloc(ifmgd
->assocreq_ies_len
, GFP_KERNEL
);
388 if (ifmgd
->assocreq_ies
)
389 memcpy(ifmgd
->assocreq_ies
, ies
, ifmgd
->assocreq_ies_len
);
391 ieee80211_tx_skb(sdata
, skb
, 0);
395 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
396 u16 stype
, u16 reason
)
398 struct ieee80211_local
*local
= sdata
->local
;
399 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
401 struct ieee80211_mgmt
*mgmt
;
403 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
405 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
406 "deauth/disassoc frame\n", sdata
->dev
->name
);
409 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
411 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
413 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
414 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
415 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
416 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
418 /* u.deauth.reason_code == u.disassoc.reason_code */
419 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
421 if (stype
== IEEE80211_STYPE_DEAUTH
)
422 cfg80211_send_deauth(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
424 cfg80211_send_disassoc(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
425 ieee80211_tx_skb(sdata
, skb
, ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
);
428 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
429 struct ieee80211_sub_if_data
*sdata
)
431 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
432 struct ieee80211_pspoll
*pspoll
;
436 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
438 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
439 "pspoll frame\n", sdata
->dev
->name
);
442 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
444 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
445 memset(pspoll
, 0, sizeof(*pspoll
));
446 fc
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
| IEEE80211_FCTL_PM
;
447 pspoll
->frame_control
= cpu_to_le16(fc
);
448 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
450 /* aid in PS-Poll has its two MSBs each set to 1 */
451 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
453 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
454 memcpy(pspoll
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
456 ieee80211_tx_skb(sdata
, skb
, 0);
459 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
460 struct ieee80211_sub_if_data
*sdata
,
464 struct ieee80211_hdr
*nullfunc
;
467 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
470 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
472 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
473 "frame\n", sdata
->dev
->name
);
476 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
478 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
479 memset(nullfunc
, 0, 24);
480 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
481 IEEE80211_FCTL_TODS
);
483 fc
|= cpu_to_le16(IEEE80211_FCTL_PM
);
484 nullfunc
->frame_control
= fc
;
485 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
486 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
487 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
489 ieee80211_tx_skb(sdata
, skb
, 0);
492 /* spectrum management related things */
493 static void ieee80211_chswitch_work(struct work_struct
*work
)
495 struct ieee80211_sub_if_data
*sdata
=
496 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.chswitch_work
);
497 struct ieee80211_bss
*bss
;
498 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
500 if (!netif_running(sdata
->dev
))
503 bss
= ieee80211_rx_bss_get(sdata
->local
, ifmgd
->bssid
,
504 sdata
->local
->hw
.conf
.channel
->center_freq
,
505 ifmgd
->ssid
, ifmgd
->ssid_len
);
509 sdata
->local
->oper_channel
= sdata
->local
->csa_channel
;
510 /* XXX: shouldn't really modify cfg80211-owned data! */
511 if (!ieee80211_hw_config(sdata
->local
, IEEE80211_CONF_CHANGE_CHANNEL
))
512 bss
->cbss
.channel
= sdata
->local
->oper_channel
;
514 ieee80211_rx_bss_put(sdata
->local
, bss
);
516 ifmgd
->flags
&= ~IEEE80211_STA_CSA_RECEIVED
;
517 ieee80211_wake_queues_by_reason(&sdata
->local
->hw
,
518 IEEE80211_QUEUE_STOP_REASON_CSA
);
521 static void ieee80211_chswitch_timer(unsigned long data
)
523 struct ieee80211_sub_if_data
*sdata
=
524 (struct ieee80211_sub_if_data
*) data
;
525 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
527 if (sdata
->local
->quiescing
) {
528 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
532 queue_work(sdata
->local
->hw
.workqueue
, &ifmgd
->chswitch_work
);
535 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data
*sdata
,
536 struct ieee80211_channel_sw_ie
*sw_elem
,
537 struct ieee80211_bss
*bss
)
539 struct ieee80211_channel
*new_ch
;
540 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
541 int new_freq
= ieee80211_channel_to_frequency(sw_elem
->new_ch_num
);
543 if (ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATED
)
546 if (sdata
->local
->sw_scanning
|| sdata
->local
->hw_scanning
)
549 /* Disregard subsequent beacons if we are already running a timer
552 if (ifmgd
->flags
& IEEE80211_STA_CSA_RECEIVED
)
555 new_ch
= ieee80211_get_channel(sdata
->local
->hw
.wiphy
, new_freq
);
556 if (!new_ch
|| new_ch
->flags
& IEEE80211_CHAN_DISABLED
)
559 sdata
->local
->csa_channel
= new_ch
;
561 if (sw_elem
->count
<= 1) {
562 queue_work(sdata
->local
->hw
.workqueue
, &ifmgd
->chswitch_work
);
564 ieee80211_stop_queues_by_reason(&sdata
->local
->hw
,
565 IEEE80211_QUEUE_STOP_REASON_CSA
);
566 ifmgd
->flags
|= IEEE80211_STA_CSA_RECEIVED
;
567 mod_timer(&ifmgd
->chswitch_timer
,
569 msecs_to_jiffies(sw_elem
->count
*
570 bss
->cbss
.beacon_interval
));
574 static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data
*sdata
,
575 u16 capab_info
, u8
*pwr_constr_elem
,
576 u8 pwr_constr_elem_len
)
578 struct ieee80211_conf
*conf
= &sdata
->local
->hw
.conf
;
580 if (!(capab_info
& WLAN_CAPABILITY_SPECTRUM_MGMT
))
583 /* Power constraint IE length should be 1 octet */
584 if (pwr_constr_elem_len
!= 1)
587 if ((*pwr_constr_elem
<= conf
->channel
->max_power
) &&
588 (*pwr_constr_elem
!= sdata
->local
->power_constr_level
)) {
589 sdata
->local
->power_constr_level
= *pwr_constr_elem
;
590 ieee80211_hw_config(sdata
->local
, 0);
595 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
596 struct ieee80211_sub_if_data
*sdata
)
598 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
601 * If we are scanning right now then the parameters will
602 * take effect when scan finishes.
604 if (local
->hw_scanning
|| local
->sw_scanning
)
607 if (conf
->dynamic_ps_timeout
> 0 &&
608 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
609 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
610 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
612 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
613 ieee80211_send_nullfunc(local
, sdata
, 1);
614 conf
->flags
|= IEEE80211_CONF_PS
;
615 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
619 static void ieee80211_change_ps(struct ieee80211_local
*local
)
621 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
623 if (local
->ps_sdata
) {
624 if (!(local
->ps_sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
))
627 ieee80211_enable_ps(local
, local
->ps_sdata
);
628 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
629 conf
->flags
&= ~IEEE80211_CONF_PS
;
630 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
631 del_timer_sync(&local
->dynamic_ps_timer
);
632 cancel_work_sync(&local
->dynamic_ps_enable_work
);
636 /* need to hold RTNL or interface lock */
637 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
639 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
642 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
643 local
->ps_sdata
= NULL
;
647 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
648 if (!netif_running(sdata
->dev
))
650 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
656 if (count
== 1 && found
->u
.mgd
.powersave
) {
660 latency
= pm_qos_requirement(PM_QOS_NETWORK_LATENCY
);
662 beaconint_us
= ieee80211_tu_to_usec(
663 found
->vif
.bss_conf
.beacon_int
);
665 if (beaconint_us
> latency
) {
666 local
->ps_sdata
= NULL
;
668 u8 dtimper
= found
->vif
.bss_conf
.dtim_period
;
672 maxslp
= min_t(int, dtimper
,
673 latency
/ beaconint_us
);
675 local
->hw
.conf
.max_sleep_period
= maxslp
;
676 local
->ps_sdata
= found
;
679 local
->ps_sdata
= NULL
;
682 ieee80211_change_ps(local
);
685 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
687 struct ieee80211_local
*local
=
688 container_of(work
, struct ieee80211_local
,
689 dynamic_ps_disable_work
);
691 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
692 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
693 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
696 ieee80211_wake_queues_by_reason(&local
->hw
,
697 IEEE80211_QUEUE_STOP_REASON_PS
);
700 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
702 struct ieee80211_local
*local
=
703 container_of(work
, struct ieee80211_local
,
704 dynamic_ps_enable_work
);
705 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
707 /* can only happen when PS was just disabled anyway */
711 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
714 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
715 ieee80211_send_nullfunc(local
, sdata
, 1);
717 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
718 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
721 void ieee80211_dynamic_ps_timer(unsigned long data
)
723 struct ieee80211_local
*local
= (void *) data
;
725 if (local
->quiescing
)
728 queue_work(local
->hw
.workqueue
, &local
->dynamic_ps_enable_work
);
732 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
733 struct ieee80211_if_managed
*ifmgd
,
734 u8
*wmm_param
, size_t wmm_param_len
)
736 struct ieee80211_tx_queue_params params
;
741 if (!(ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
))
747 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
749 count
= wmm_param
[6] & 0x0f;
750 if (count
== ifmgd
->wmm_last_param_set
)
752 ifmgd
->wmm_last_param_set
= count
;
755 left
= wmm_param_len
- 8;
757 memset(¶ms
, 0, sizeof(params
));
760 for (; left
>= 4; left
-= 4, pos
+= 4) {
761 int aci
= (pos
[0] >> 5) & 0x03;
762 int acm
= (pos
[0] >> 4) & 0x01;
769 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
774 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
779 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
785 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
789 params
.aifs
= pos
[0] & 0x0f;
790 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
791 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
792 params
.txop
= get_unaligned_le16(pos
+ 2);
793 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
794 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
795 "cWmin=%d cWmax=%d txop=%d\n",
796 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
797 params
.cw_max
, params
.txop
);
799 if (drv_conf_tx(local
, queue
, ¶ms
) && local
->ops
->conf_tx
)
800 printk(KERN_DEBUG
"%s: failed to set TX queue "
801 "parameters for queue %d\n", local
->mdev
->name
,
806 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
807 u16 capab
, bool erp_valid
, u8 erp
)
809 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
810 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
811 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
815 bool use_short_preamble
;
819 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
820 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
822 use_protection
= false;
823 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
826 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
828 if (use_protection
!= bss_conf
->use_cts_prot
) {
829 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
830 if (net_ratelimit()) {
831 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID=%pM)\n",
833 use_protection
? "enabled" : "disabled",
837 bss_conf
->use_cts_prot
= use_protection
;
838 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
841 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
842 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
843 if (net_ratelimit()) {
844 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
847 use_short_preamble
? "short" : "long",
851 bss_conf
->use_short_preamble
= use_short_preamble
;
852 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
855 if (use_short_slot
!= bss_conf
->use_short_slot
) {
856 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
857 if (net_ratelimit()) {
858 printk(KERN_DEBUG
"%s: switched to %s slot time"
861 use_short_slot
? "short" : "long",
865 bss_conf
->use_short_slot
= use_short_slot
;
866 changed
|= BSS_CHANGED_ERP_SLOT
;
872 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
)
874 union iwreq_data wrqu
;
876 memset(&wrqu
, 0, sizeof(wrqu
));
877 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
)
878 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
879 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
880 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
883 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
)
885 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
889 union iwreq_data wrqu
;
891 if (!ifmgd
->assocreq_ies
&& !ifmgd
->assocresp_ies
)
894 buf
= kmalloc(50 + 2 * (ifmgd
->assocreq_ies_len
+
895 ifmgd
->assocresp_ies_len
), GFP_KERNEL
);
899 len
= sprintf(buf
, "ASSOCINFO(");
900 if (ifmgd
->assocreq_ies
) {
901 len
+= sprintf(buf
+ len
, "ReqIEs=");
902 for (i
= 0; i
< ifmgd
->assocreq_ies_len
; i
++) {
903 len
+= sprintf(buf
+ len
, "%02x",
904 ifmgd
->assocreq_ies
[i
]);
907 if (ifmgd
->assocresp_ies
) {
908 if (ifmgd
->assocreq_ies
)
909 len
+= sprintf(buf
+ len
, " ");
910 len
+= sprintf(buf
+ len
, "RespIEs=");
911 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
912 len
+= sprintf(buf
+ len
, "%02x",
913 ifmgd
->assocresp_ies
[i
]);
916 len
+= sprintf(buf
+ len
, ")");
918 if (len
> IW_CUSTOM_MAX
) {
919 len
= sprintf(buf
, "ASSOCRESPIE=");
920 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
921 len
+= sprintf(buf
+ len
, "%02x",
922 ifmgd
->assocresp_ies
[i
]);
926 if (len
<= IW_CUSTOM_MAX
) {
927 memset(&wrqu
, 0, sizeof(wrqu
));
928 wrqu
.data
.length
= len
;
929 wireless_send_event(sdata
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
936 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
937 u32 bss_info_changed
)
939 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
940 struct ieee80211_local
*local
= sdata
->local
;
941 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
943 struct ieee80211_bss
*bss
;
945 bss_info_changed
|= BSS_CHANGED_ASSOC
;
946 ifmgd
->flags
|= IEEE80211_STA_ASSOCIATED
;
948 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
949 conf
->channel
->center_freq
,
950 ifmgd
->ssid
, ifmgd
->ssid_len
);
952 /* set timing information */
953 sdata
->vif
.bss_conf
.beacon_int
= bss
->cbss
.beacon_interval
;
954 sdata
->vif
.bss_conf
.timestamp
= bss
->cbss
.tsf
;
955 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
957 bss_info_changed
|= BSS_CHANGED_BEACON_INT
;
958 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
959 bss
->cbss
.capability
, bss
->has_erp_value
, bss
->erp_value
);
961 cfg80211_hold_bss(&bss
->cbss
);
963 ieee80211_rx_bss_put(local
, bss
);
966 ifmgd
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
967 memcpy(ifmgd
->prev_bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
968 ieee80211_sta_send_associnfo(sdata
);
970 ifmgd
->last_probe
= jiffies
;
971 ieee80211_led_assoc(local
, 1);
973 sdata
->vif
.bss_conf
.assoc
= 1;
975 * For now just always ask the driver to update the basic rateset
976 * when we have associated, we aren't checking whether it actually
979 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
980 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
982 /* will be same as sdata */
983 if (local
->ps_sdata
) {
984 mutex_lock(&local
->iflist_mtx
);
985 ieee80211_recalc_ps(local
, -1);
986 mutex_unlock(&local
->iflist_mtx
);
989 netif_tx_start_all_queues(sdata
->dev
);
990 netif_carrier_on(sdata
->dev
);
992 ieee80211_sta_send_apinfo(sdata
);
995 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
)
997 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
998 struct ieee80211_local
*local
= sdata
->local
;
1000 ifmgd
->direct_probe_tries
++;
1001 if (ifmgd
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
1002 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
1003 sdata
->dev
->name
, ifmgd
->bssid
);
1004 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1005 ieee80211_recalc_idle(local
);
1006 cfg80211_send_auth_timeout(sdata
->dev
, ifmgd
->bssid
);
1009 * Most likely AP is not in the range so remove the
1010 * bss information associated to the AP
1012 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1013 sdata
->local
->hw
.conf
.channel
->center_freq
,
1014 ifmgd
->ssid
, ifmgd
->ssid_len
);
1017 * We might have a pending scan which had no chance to run yet
1018 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
1019 * Hence, queue the STAs work again
1021 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1025 printk(KERN_DEBUG
"%s: direct probe to AP %pM try %d\n",
1026 sdata
->dev
->name
, ifmgd
->bssid
,
1027 ifmgd
->direct_probe_tries
);
1029 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1031 /* Direct probe is sent to broadcast address as some APs
1032 * will not answer to direct packet in unassociated state.
1034 ieee80211_send_probe_req(sdata
, NULL
,
1035 ifmgd
->ssid
, ifmgd
->ssid_len
, NULL
, 0);
1037 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
1041 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
)
1043 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1044 struct ieee80211_local
*local
= sdata
->local
;
1048 ifmgd
->auth_tries
++;
1049 if (ifmgd
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
1050 printk(KERN_DEBUG
"%s: authentication with AP %pM"
1052 sdata
->dev
->name
, ifmgd
->bssid
);
1053 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1054 ieee80211_recalc_idle(local
);
1055 cfg80211_send_auth_timeout(sdata
->dev
, ifmgd
->bssid
);
1056 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1057 sdata
->local
->hw
.conf
.channel
->center_freq
,
1058 ifmgd
->ssid
, ifmgd
->ssid_len
);
1061 * We might have a pending scan which had no chance to run yet
1062 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
1063 * Hence, queue the STAs work again
1065 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1069 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
1070 printk(KERN_DEBUG
"%s: authenticate with AP %pM\n",
1071 sdata
->dev
->name
, ifmgd
->bssid
);
1073 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1074 ies
= ifmgd
->sme_auth_ie
;
1075 ies_len
= ifmgd
->sme_auth_ie_len
;
1080 ieee80211_send_auth(sdata
, 1, ifmgd
->auth_alg
, ies
, ies_len
,
1082 ifmgd
->auth_transaction
= 2;
1084 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
1088 * The disassoc 'reason' argument can be either our own reason
1089 * if self disconnected or a reason code from the AP.
1091 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
1092 bool deauth
, bool self_disconnected
,
1095 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1096 struct ieee80211_local
*local
= sdata
->local
;
1097 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
1098 struct ieee80211_bss
*bss
;
1099 struct sta_info
*sta
;
1100 u32 changed
= 0, config_changed
= 0;
1104 sta
= sta_info_get(local
, ifmgd
->bssid
);
1111 ifmgd
->direct_probe_tries
= 0;
1112 ifmgd
->auth_tries
= 0;
1114 ifmgd
->assoc_scan_tries
= 0;
1115 ifmgd
->assoc_tries
= 0;
1117 netif_tx_stop_all_queues(sdata
->dev
);
1118 netif_carrier_off(sdata
->dev
);
1120 ieee80211_sta_tear_down_BA_sessions(sta
);
1122 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
1123 conf
->channel
->center_freq
,
1124 ifmgd
->ssid
, ifmgd
->ssid_len
);
1127 cfg80211_unhold_bss(&bss
->cbss
);
1128 ieee80211_rx_bss_put(local
, bss
);
1131 if (self_disconnected
) {
1133 ieee80211_send_deauth_disassoc(sdata
,
1134 IEEE80211_STYPE_DEAUTH
, reason
);
1136 ieee80211_send_deauth_disassoc(sdata
,
1137 IEEE80211_STYPE_DISASSOC
, reason
);
1140 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
1141 changed
|= ieee80211_reset_erp_info(sdata
);
1143 ieee80211_led_assoc(local
, 0);
1144 changed
|= BSS_CHANGED_ASSOC
;
1145 sdata
->vif
.bss_conf
.assoc
= false;
1147 ieee80211_sta_send_apinfo(sdata
);
1149 if (self_disconnected
|| reason
== WLAN_REASON_DISASSOC_STA_HAS_LEFT
) {
1150 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1151 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1152 sdata
->local
->hw
.conf
.channel
->center_freq
,
1153 ifmgd
->ssid
, ifmgd
->ssid_len
);
1158 ieee80211_set_wmm_default(sdata
);
1160 ieee80211_recalc_idle(local
);
1162 /* channel(_type) changes are handled by ieee80211_hw_config */
1163 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
1165 /* on the next assoc, re-program HT parameters */
1166 sdata
->ht_opmode_valid
= false;
1168 local
->power_constr_level
= 0;
1170 del_timer_sync(&local
->dynamic_ps_timer
);
1171 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1173 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1174 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1175 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1178 ieee80211_hw_config(local
, config_changed
);
1179 ieee80211_bss_info_change_notify(sdata
, changed
);
1183 sta
= sta_info_get(local
, ifmgd
->bssid
);
1189 sta_info_unlink(&sta
);
1193 sta_info_destroy(sta
);
1196 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
1198 if (!sdata
|| !sdata
->default_key
||
1199 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
1204 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
)
1206 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1207 struct ieee80211_local
*local
= sdata
->local
;
1208 struct ieee80211_bss
*bss
;
1211 int privacy_invoked
;
1213 if (!ifmgd
|| (ifmgd
->flags
& IEEE80211_STA_EXT_SME
))
1216 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
1217 local
->hw
.conf
.channel
->center_freq
,
1218 ifmgd
->ssid
, ifmgd
->ssid_len
);
1222 bss_privacy
= !!(bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
);
1223 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
1224 privacy_invoked
= !!(ifmgd
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
1226 ieee80211_rx_bss_put(local
, bss
);
1228 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
1234 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
)
1236 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1237 struct ieee80211_local
*local
= sdata
->local
;
1239 ifmgd
->assoc_tries
++;
1240 if (ifmgd
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1241 printk(KERN_DEBUG
"%s: association with AP %pM"
1243 sdata
->dev
->name
, ifmgd
->bssid
);
1244 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1245 ieee80211_recalc_idle(local
);
1246 cfg80211_send_assoc_timeout(sdata
->dev
, ifmgd
->bssid
);
1247 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1248 sdata
->local
->hw
.conf
.channel
->center_freq
,
1249 ifmgd
->ssid
, ifmgd
->ssid_len
);
1251 * We might have a pending scan which had no chance to run yet
1252 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1253 * Hence, queue the STAs work again
1255 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1259 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1260 printk(KERN_DEBUG
"%s: associate with AP %pM\n",
1261 sdata
->dev
->name
, ifmgd
->bssid
);
1262 if (ieee80211_privacy_mismatch(sdata
)) {
1263 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
1264 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
1265 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1266 ieee80211_recalc_idle(local
);
1270 ieee80211_send_assoc(sdata
);
1272 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
1275 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1276 struct ieee80211_hdr
*hdr
)
1279 * We can postpone the mgd.timer whenever receiving unicast frames
1280 * from AP because we know that the connection is working both ways
1281 * at that time. But multicast frames (and hence also beacons) must
1282 * be ignored here, because we need to trigger the timer during
1283 * data idle periods for sending the periodical probe request to
1286 if (!is_multicast_ether_addr(hdr
->addr1
))
1287 mod_timer(&sdata
->u
.mgd
.timer
,
1288 jiffies
+ IEEE80211_MONITORING_INTERVAL
);
1291 void ieee80211_beacon_loss_work(struct work_struct
*work
)
1293 struct ieee80211_sub_if_data
*sdata
=
1294 container_of(work
, struct ieee80211_sub_if_data
,
1295 u
.mgd
.beacon_loss_work
);
1296 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1299 * The driver has already reported this event and we have
1300 * already sent a probe request. Maybe the AP died and the
1301 * driver keeps reporting until we disassociate... We have
1302 * to ignore that because otherwise we would continually
1303 * reset the timer and never check whether we received a
1306 if (ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
)
1309 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1310 if (net_ratelimit()) {
1311 printk(KERN_DEBUG
"%s: driver reports beacon loss from AP %pM "
1312 "- sending probe request\n", sdata
->dev
->name
,
1313 sdata
->u
.mgd
.bssid
);
1317 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1318 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1319 ifmgd
->ssid_len
, NULL
, 0);
1321 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_PROBE_WAIT
);
1324 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1326 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1328 queue_work(sdata
->local
->hw
.workqueue
,
1329 &sdata
->u
.mgd
.beacon_loss_work
);
1331 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1333 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
)
1335 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1336 struct ieee80211_local
*local
= sdata
->local
;
1337 struct sta_info
*sta
;
1338 bool disassoc
= false;
1340 /* TODO: start monitoring current AP signal quality and number of
1341 * missed beacons. Scan other channels every now and then and search
1342 * for better APs. */
1343 /* TODO: remove expired BSSes */
1345 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
1349 sta
= sta_info_get(local
, ifmgd
->bssid
);
1351 printk(KERN_DEBUG
"%s: No STA entry for own AP %pM\n",
1352 sdata
->dev
->name
, ifmgd
->bssid
);
1357 if ((ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
) &&
1358 time_after(jiffies
, sta
->last_rx
+ IEEE80211_PROBE_WAIT
)) {
1359 printk(KERN_DEBUG
"%s: no probe response from AP %pM "
1360 "- disassociating\n",
1361 sdata
->dev
->name
, ifmgd
->bssid
);
1363 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1368 * Beacon filtering is only enabled with power save and then the
1369 * stack should not check for beacon loss.
1371 if (!((local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
) &&
1372 (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) &&
1374 ifmgd
->last_beacon
+ IEEE80211_MONITORING_INTERVAL
)) {
1375 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1376 if (net_ratelimit()) {
1377 printk(KERN_DEBUG
"%s: beacon loss from AP %pM "
1378 "- sending probe request\n",
1379 sdata
->dev
->name
, ifmgd
->bssid
);
1382 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1383 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1384 ifmgd
->ssid_len
, NULL
, 0);
1389 if (time_after(jiffies
, sta
->last_rx
+ IEEE80211_PROBE_IDLE_TIME
)) {
1390 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1391 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1392 ifmgd
->ssid_len
, NULL
, 0);
1399 ieee80211_set_disassoc(sdata
, true, true,
1400 WLAN_REASON_PREV_AUTH_NOT_VALID
);
1402 mod_timer(&ifmgd
->timer
, jiffies
+
1403 IEEE80211_MONITORING_INTERVAL
);
1407 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
)
1409 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1411 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1412 ifmgd
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1413 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1414 /* Wait for SME to request association */
1415 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1416 ieee80211_recalc_idle(sdata
->local
);
1418 ieee80211_associate(sdata
);
1422 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1423 struct ieee80211_mgmt
*mgmt
,
1427 struct ieee802_11_elems elems
;
1429 pos
= mgmt
->u
.auth
.variable
;
1430 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1431 if (!elems
.challenge
)
1433 ieee80211_send_auth(sdata
, 3, sdata
->u
.mgd
.auth_alg
,
1434 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1435 sdata
->u
.mgd
.bssid
, 1);
1436 sdata
->u
.mgd
.auth_transaction
= 4;
1439 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1440 struct ieee80211_mgmt
*mgmt
,
1443 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1444 u16 auth_alg
, auth_transaction
, status_code
;
1446 if (ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
)
1452 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1455 if (memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1458 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1459 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1460 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1462 if (auth_alg
!= ifmgd
->auth_alg
||
1463 auth_transaction
!= ifmgd
->auth_transaction
)
1466 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1467 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1469 const int num_algs
= ARRAY_SIZE(algs
);
1471 algs
[0] = algs
[1] = algs
[2] = 0xff;
1472 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1473 algs
[0] = WLAN_AUTH_OPEN
;
1474 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1475 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1476 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1477 algs
[2] = WLAN_AUTH_LEAP
;
1478 if (ifmgd
->auth_alg
== WLAN_AUTH_OPEN
)
1480 else if (ifmgd
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1484 for (i
= 0; i
< num_algs
; i
++) {
1486 if (pos
>= num_algs
)
1488 if (algs
[pos
] == ifmgd
->auth_alg
||
1491 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1492 !ieee80211_sta_wep_configured(sdata
))
1494 ifmgd
->auth_alg
= algs
[pos
];
1501 switch (ifmgd
->auth_alg
) {
1502 case WLAN_AUTH_OPEN
:
1503 case WLAN_AUTH_LEAP
:
1505 ieee80211_auth_completed(sdata
);
1506 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1508 case WLAN_AUTH_SHARED_KEY
:
1509 if (ifmgd
->auth_transaction
== 4) {
1510 ieee80211_auth_completed(sdata
);
1511 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1513 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1519 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1520 struct ieee80211_mgmt
*mgmt
,
1523 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1529 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1532 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1534 if (ifmgd
->flags
& IEEE80211_STA_AUTHENTICATED
)
1535 printk(KERN_DEBUG
"%s: deauthenticated (Reason: %u)\n",
1536 sdata
->dev
->name
, reason_code
);
1538 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1539 (ifmgd
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1540 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1541 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)) {
1542 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1543 mod_timer(&ifmgd
->timer
, jiffies
+
1544 IEEE80211_RETRY_AUTH_INTERVAL
);
1547 ieee80211_set_disassoc(sdata
, true, false, 0);
1548 ifmgd
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1549 cfg80211_send_deauth(sdata
->dev
, (u8
*) mgmt
, len
);
1553 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1554 struct ieee80211_mgmt
*mgmt
,
1557 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1563 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1566 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1568 if (ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
)
1569 printk(KERN_DEBUG
"%s: disassociated (Reason: %u)\n",
1570 sdata
->dev
->name
, reason_code
);
1572 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1573 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1574 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1575 mod_timer(&ifmgd
->timer
, jiffies
+
1576 IEEE80211_RETRY_AUTH_INTERVAL
);
1579 ieee80211_set_disassoc(sdata
, false, false, reason_code
);
1580 cfg80211_send_disassoc(sdata
->dev
, (u8
*) mgmt
, len
);
1584 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1585 struct ieee80211_mgmt
*mgmt
,
1589 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1590 struct ieee80211_local
*local
= sdata
->local
;
1591 struct ieee80211_supported_band
*sband
;
1592 struct sta_info
*sta
;
1593 u32 rates
, basic_rates
;
1594 u16 capab_info
, status_code
, aid
;
1595 struct ieee802_11_elems elems
;
1596 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1600 bool have_higher_than_11mbit
= false, newsta
= false;
1601 u16 ap_ht_cap_flags
;
1603 /* AssocResp and ReassocResp have identical structure, so process both
1604 * of them in this function. */
1606 if (ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1612 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1615 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1616 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1617 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1619 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1620 "status=%d aid=%d)\n",
1621 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1622 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1624 pos
= mgmt
->u
.assoc_resp
.variable
;
1625 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1627 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1628 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1629 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1631 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1632 ms
= tu
* 1024 / 1000;
1633 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1634 "comeback duration %u TU (%u ms)\n",
1635 sdata
->dev
->name
, tu
, ms
);
1636 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1637 mod_timer(&ifmgd
->timer
,
1638 jiffies
+ msecs_to_jiffies(ms
));
1642 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1643 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1644 sdata
->dev
->name
, status_code
);
1645 /* if this was a reassociation, ensure we try a "full"
1646 * association next time. This works around some broken APs
1647 * which do not correctly reject reassociation requests. */
1648 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1649 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1650 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1651 /* Wait for SME to decide what to do next */
1652 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1653 ieee80211_recalc_idle(local
);
1658 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1659 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1660 "set\n", sdata
->dev
->name
, aid
);
1661 aid
&= ~(BIT(15) | BIT(14));
1663 if (!elems
.supp_rates
) {
1664 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1669 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1671 ifmgd
->ap_capab
= capab_info
;
1673 kfree(ifmgd
->assocresp_ies
);
1674 ifmgd
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1675 ifmgd
->assocresp_ies
= kmalloc(ifmgd
->assocresp_ies_len
, GFP_KERNEL
);
1676 if (ifmgd
->assocresp_ies
)
1677 memcpy(ifmgd
->assocresp_ies
, pos
, ifmgd
->assocresp_ies_len
);
1681 /* Add STA entry for the AP */
1682 sta
= sta_info_get(local
, ifmgd
->bssid
);
1686 sta
= sta_info_alloc(sdata
, ifmgd
->bssid
, GFP_ATOMIC
);
1688 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1689 " the AP\n", sdata
->dev
->name
);
1694 /* update new sta with its last rx activity */
1695 sta
->last_rx
= jiffies
;
1699 * FIXME: Do we really need to update the sta_info's information here?
1700 * We already know about the AP (we found it in our list) so it
1701 * should already be filled with the right info, no?
1702 * As is stands, all this is racy because typically we assume
1703 * the information that is filled in here (except flags) doesn't
1704 * change while a STA structure is alive. As such, it should move
1705 * to between the sta_info_alloc() and sta_info_insert() above.
1708 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
);
1709 if (!(ifmgd
->flags
& IEEE80211_STA_CONTROL_PORT
))
1710 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
1714 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1716 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1717 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1718 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1721 have_higher_than_11mbit
= true;
1723 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1724 if (sband
->bitrates
[j
].bitrate
== rate
) {
1727 basic_rates
|= BIT(j
);
1733 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1734 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1735 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1738 have_higher_than_11mbit
= true;
1740 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1741 if (sband
->bitrates
[j
].bitrate
== rate
) {
1744 basic_rates
|= BIT(j
);
1750 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1751 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1753 /* cf. IEEE 802.11 9.2.12 */
1754 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1755 have_higher_than_11mbit
)
1756 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1758 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1760 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1761 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1762 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1763 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1765 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1767 rate_control_rate_init(sta
);
1769 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1770 set_sta_flags(sta
, WLAN_STA_MFP
);
1772 if (elems
.wmm_param
)
1773 set_sta_flags(sta
, WLAN_STA_WME
);
1776 int err
= sta_info_insert(sta
);
1778 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1779 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1787 if (elems
.wmm_param
)
1788 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1789 elems
.wmm_param_len
);
1791 ieee80211_set_wmm_default(sdata
);
1793 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1794 (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
1795 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1796 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1799 /* set AID and assoc capability,
1800 * ieee80211_set_associated() will tell the driver */
1801 bss_conf
->aid
= aid
;
1802 bss_conf
->assoc_capability
= capab_info
;
1803 ieee80211_set_associated(sdata
, changed
);
1806 * initialise the time of last beacon to be the association time,
1807 * otherwise beacon loss check will trigger immediately
1809 ifmgd
->last_beacon
= jiffies
;
1811 ieee80211_associated(sdata
);
1812 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1816 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1817 struct ieee80211_mgmt
*mgmt
,
1819 struct ieee80211_rx_status
*rx_status
,
1820 struct ieee802_11_elems
*elems
,
1823 struct ieee80211_local
*local
= sdata
->local
;
1825 struct ieee80211_bss
*bss
;
1826 struct ieee80211_channel
*channel
;
1828 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1829 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1831 freq
= rx_status
->freq
;
1833 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1835 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1838 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1843 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1844 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
) == 0)) {
1845 struct ieee80211_channel_sw_ie
*sw_elem
=
1846 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1847 ieee80211_sta_process_chanswitch(sdata
, sw_elem
, bss
);
1850 ieee80211_rx_bss_put(local
, bss
);
1854 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1855 struct ieee80211_mgmt
*mgmt
,
1857 struct ieee80211_rx_status
*rx_status
)
1859 struct ieee80211_if_managed
*ifmgd
;
1861 struct ieee802_11_elems elems
;
1863 ifmgd
= &sdata
->u
.mgd
;
1865 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1866 return; /* ignore ProbeResp to foreign address */
1868 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1872 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1875 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1877 /* direct probe may be part of the association flow */
1878 if (ifmgd
->state
== IEEE80211_STA_MLME_DIRECT_PROBE
) {
1879 printk(KERN_DEBUG
"%s direct probe responded\n",
1881 ieee80211_authenticate(sdata
);
1884 if (ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
)
1885 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1889 * This is the canonical list of information elements we care about,
1890 * the filter code also gives us all changes to the Microsoft OUI
1891 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1893 * We implement beacon filtering in software since that means we can
1894 * avoid processing the frame here and in cfg80211, and userspace
1895 * will not be able to tell whether the hardware supports it or not.
1897 * XXX: This list needs to be dynamic -- userspace needs to be able to
1898 * add items it requires. It also needs to be able to tell us to
1899 * look out for other vendor IEs.
1901 static const u64 care_about_ies
=
1902 (1ULL << WLAN_EID_COUNTRY
) |
1903 (1ULL << WLAN_EID_ERP_INFO
) |
1904 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1905 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1906 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1907 (1ULL << WLAN_EID_HT_INFORMATION
);
1909 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1910 struct ieee80211_mgmt
*mgmt
,
1912 struct ieee80211_rx_status
*rx_status
)
1914 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1916 struct ieee802_11_elems elems
;
1917 struct ieee80211_local
*local
= sdata
->local
;
1919 bool erp_valid
, directed_tim
= false;
1923 /* Process beacon from the current BSS */
1924 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1928 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1931 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1932 memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1935 if (ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
) {
1936 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1937 if (net_ratelimit()) {
1938 printk(KERN_DEBUG
"%s: cancelling probereq poll due "
1939 "to a received beacon\n", sdata
->dev
->name
);
1942 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1945 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1946 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1947 len
- baselen
, &elems
,
1948 care_about_ies
, ncrc
);
1950 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1951 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1954 if (ncrc
!= ifmgd
->beacon_crc
) {
1955 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
,
1958 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1959 elems
.wmm_param_len
);
1962 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1964 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1965 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1966 ieee80211_hw_config(local
,
1967 IEEE80211_CONF_CHANGE_PS
);
1968 ieee80211_send_nullfunc(local
, sdata
, 0);
1970 local
->pspolling
= true;
1973 * Here is assumed that the driver will be
1974 * able to send ps-poll frame and receive a
1975 * response even though power save mode is
1976 * enabled, but some drivers might require
1977 * to disable power save here. This needs
1978 * to be investigated.
1980 ieee80211_send_pspoll(local
, sdata
);
1985 if (ncrc
== ifmgd
->beacon_crc
)
1987 ifmgd
->beacon_crc
= ncrc
;
1989 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1991 erp_value
= elems
.erp_info
[0];
1995 changed
|= ieee80211_handle_bss_capability(sdata
,
1996 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1997 erp_valid
, erp_value
);
2000 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
2001 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
)) {
2002 struct sta_info
*sta
;
2003 struct ieee80211_supported_band
*sband
;
2004 u16 ap_ht_cap_flags
;
2008 sta
= sta_info_get(local
, ifmgd
->bssid
);
2014 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2016 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
2017 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
2019 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
2023 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
2027 if (elems
.country_elem
) {
2028 /* Note we are only reviewing this on beacons
2029 * for the BSSID we are associated to */
2030 regulatory_hint_11d(local
->hw
.wiphy
,
2031 elems
.country_elem
, elems
.country_elem_len
);
2033 /* TODO: IBSS also needs this */
2034 if (elems
.pwr_constr_elem
)
2035 ieee80211_handle_pwr_constr(sdata
,
2036 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
2037 elems
.pwr_constr_elem
,
2038 elems
.pwr_constr_elem_len
);
2041 ieee80211_bss_info_change_notify(sdata
, changed
);
2044 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
2045 struct sk_buff
*skb
,
2046 struct ieee80211_rx_status
*rx_status
)
2048 struct ieee80211_local
*local
= sdata
->local
;
2049 struct ieee80211_mgmt
*mgmt
;
2053 return RX_DROP_MONITOR
;
2055 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2056 fc
= le16_to_cpu(mgmt
->frame_control
);
2058 switch (fc
& IEEE80211_FCTL_STYPE
) {
2059 case IEEE80211_STYPE_PROBE_REQ
:
2060 case IEEE80211_STYPE_PROBE_RESP
:
2061 case IEEE80211_STYPE_BEACON
:
2062 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
2063 case IEEE80211_STYPE_AUTH
:
2064 case IEEE80211_STYPE_ASSOC_RESP
:
2065 case IEEE80211_STYPE_REASSOC_RESP
:
2066 case IEEE80211_STYPE_DEAUTH
:
2067 case IEEE80211_STYPE_DISASSOC
:
2068 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
2069 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
2073 return RX_DROP_MONITOR
;
2076 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2077 struct sk_buff
*skb
)
2079 struct ieee80211_rx_status
*rx_status
;
2080 struct ieee80211_mgmt
*mgmt
;
2083 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2084 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2085 fc
= le16_to_cpu(mgmt
->frame_control
);
2087 switch (fc
& IEEE80211_FCTL_STYPE
) {
2088 case IEEE80211_STYPE_PROBE_RESP
:
2089 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
,
2092 case IEEE80211_STYPE_BEACON
:
2093 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
2096 case IEEE80211_STYPE_AUTH
:
2097 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
2099 case IEEE80211_STYPE_ASSOC_RESP
:
2100 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 0);
2102 case IEEE80211_STYPE_REASSOC_RESP
:
2103 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 1);
2105 case IEEE80211_STYPE_DEAUTH
:
2106 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
2108 case IEEE80211_STYPE_DISASSOC
:
2109 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
2116 static void ieee80211_sta_timer(unsigned long data
)
2118 struct ieee80211_sub_if_data
*sdata
=
2119 (struct ieee80211_sub_if_data
*) data
;
2120 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2121 struct ieee80211_local
*local
= sdata
->local
;
2123 if (local
->quiescing
) {
2124 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2128 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2129 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
2132 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
)
2134 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2135 struct ieee80211_local
*local
= sdata
->local
;
2137 /* Reset own TSF to allow time synchronization work. */
2138 drv_reset_tsf(local
);
2140 ifmgd
->wmm_last_param_set
= -1; /* allow any WMM update */
2143 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
2144 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
2145 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
2146 ifmgd
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
2147 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
2148 ifmgd
->auth_alg
= WLAN_AUTH_LEAP
;
2149 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_FT
)
2150 ifmgd
->auth_alg
= WLAN_AUTH_FT
;
2152 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
2153 ifmgd
->auth_transaction
= -1;
2154 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
2155 ifmgd
->assoc_scan_tries
= 0;
2156 ifmgd
->direct_probe_tries
= 0;
2157 ifmgd
->auth_tries
= 0;
2158 ifmgd
->assoc_tries
= 0;
2159 netif_tx_stop_all_queues(sdata
->dev
);
2160 netif_carrier_off(sdata
->dev
);
2163 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
)
2165 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2166 struct ieee80211_local
*local
= sdata
->local
;
2167 struct ieee80211_bss
*bss
;
2168 u8
*bssid
= ifmgd
->bssid
, *ssid
= ifmgd
->ssid
;
2169 u8 ssid_len
= ifmgd
->ssid_len
;
2170 u16 capa_mask
= WLAN_CAPABILITY_ESS
;
2171 u16 capa_val
= WLAN_CAPABILITY_ESS
;
2172 struct ieee80211_channel
*chan
= local
->oper_channel
;
2174 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
2175 ifmgd
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
2176 IEEE80211_STA_AUTO_BSSID_SEL
|
2177 IEEE80211_STA_AUTO_CHANNEL_SEL
)) {
2178 capa_mask
|= WLAN_CAPABILITY_PRIVACY
;
2179 if (sdata
->default_key
)
2180 capa_val
|= WLAN_CAPABILITY_PRIVACY
;
2183 if (ifmgd
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
2186 if (ifmgd
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
2189 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) {
2194 bss
= (void *)cfg80211_get_bss(local
->hw
.wiphy
, chan
,
2195 bssid
, ssid
, ssid_len
,
2196 capa_mask
, capa_val
);
2199 ieee80211_set_freq(sdata
, bss
->cbss
.channel
->center_freq
);
2200 if (!(ifmgd
->flags
& IEEE80211_STA_SSID_SET
))
2201 ieee80211_sta_set_ssid(sdata
, bss
->ssid
,
2203 ieee80211_sta_set_bssid(sdata
, bss
->cbss
.bssid
);
2204 ieee80211_sta_def_wmm_params(sdata
, bss
->supp_rates_len
,
2206 if (sdata
->u
.mgd
.mfp
== IEEE80211_MFP_REQUIRED
)
2207 sdata
->u
.mgd
.flags
|= IEEE80211_STA_MFP_ENABLED
;
2209 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2211 /* Send out direct probe if no probe resp was received or
2212 * the one we have is outdated
2214 if (!bss
->last_probe_resp
||
2215 time_after(jiffies
, bss
->last_probe_resp
2216 + IEEE80211_SCAN_RESULT_EXPIRE
))
2217 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
2219 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2221 ieee80211_rx_bss_put(local
, bss
);
2222 ieee80211_sta_reset_auth(sdata
);
2225 if (ifmgd
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
2227 ifmgd
->assoc_scan_tries
++;
2229 ieee80211_request_internal_scan(sdata
, ifmgd
->ssid
,
2232 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2233 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
2235 ifmgd
->assoc_scan_tries
= 0;
2236 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
2237 ieee80211_recalc_idle(local
);
2244 static void ieee80211_sta_work(struct work_struct
*work
)
2246 struct ieee80211_sub_if_data
*sdata
=
2247 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
2248 struct ieee80211_local
*local
= sdata
->local
;
2249 struct ieee80211_if_managed
*ifmgd
;
2250 struct sk_buff
*skb
;
2252 if (!netif_running(sdata
->dev
))
2255 if (local
->sw_scanning
|| local
->hw_scanning
)
2258 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2262 * Nothing should have been stuffed into the workqueue during
2263 * the suspend->resume cycle. If this WARN is seen then there
2264 * is a bug with either the driver suspend or something in
2265 * mac80211 stuffing into the workqueue which we haven't yet
2266 * cleared during mac80211's suspend cycle.
2268 if (WARN_ON(local
->suspended
))
2271 ifmgd
= &sdata
->u
.mgd
;
2273 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
2274 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2276 if (ifmgd
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
2277 ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
2278 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
2279 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifmgd
->request
)) {
2280 queue_delayed_work(local
->hw
.workqueue
, &local
->scan_work
,
2281 round_jiffies_relative(0));
2285 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
)) {
2286 if (ieee80211_sta_config_auth(sdata
))
2288 clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2289 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
))
2292 ieee80211_recalc_idle(local
);
2294 switch (ifmgd
->state
) {
2295 case IEEE80211_STA_MLME_DISABLED
:
2297 case IEEE80211_STA_MLME_DIRECT_PROBE
:
2298 ieee80211_direct_probe(sdata
);
2300 case IEEE80211_STA_MLME_AUTHENTICATE
:
2301 ieee80211_authenticate(sdata
);
2303 case IEEE80211_STA_MLME_ASSOCIATE
:
2304 ieee80211_associate(sdata
);
2306 case IEEE80211_STA_MLME_ASSOCIATED
:
2307 ieee80211_associated(sdata
);
2314 if (ieee80211_privacy_mismatch(sdata
)) {
2315 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2316 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
2318 ieee80211_set_disassoc(sdata
, false, true,
2319 WLAN_REASON_UNSPECIFIED
);
2323 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2325 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2327 * Need to update last_beacon to avoid beacon loss
2330 sdata
->u
.mgd
.last_beacon
= jiffies
;
2333 queue_work(sdata
->local
->hw
.workqueue
,
2334 &sdata
->u
.mgd
.work
);
2339 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data
*sdata
)
2341 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2344 * we need to use atomic bitops for the running bits
2345 * only because both timers might fire at the same
2346 * time -- the code here is properly synchronised.
2349 cancel_work_sync(&ifmgd
->work
);
2350 cancel_work_sync(&ifmgd
->beacon_loss_work
);
2351 if (del_timer_sync(&ifmgd
->timer
))
2352 set_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
);
2354 cancel_work_sync(&ifmgd
->chswitch_work
);
2355 if (del_timer_sync(&ifmgd
->chswitch_timer
))
2356 set_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
);
2359 void ieee80211_sta_restart(struct ieee80211_sub_if_data
*sdata
)
2361 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2363 if (test_and_clear_bit(TMR_RUNNING_TIMER
, &ifmgd
->timers_running
))
2364 add_timer(&ifmgd
->timer
);
2365 if (test_and_clear_bit(TMR_RUNNING_CHANSW
, &ifmgd
->timers_running
))
2366 add_timer(&ifmgd
->chswitch_timer
);
2370 /* interface setup */
2371 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2373 struct ieee80211_if_managed
*ifmgd
;
2376 ifmgd
= &sdata
->u
.mgd
;
2377 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
2378 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2379 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
2380 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2381 (unsigned long) sdata
);
2382 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2383 (unsigned long) sdata
);
2384 skb_queue_head_init(&ifmgd
->skb_queue
);
2386 ifmgd
->capab
= WLAN_CAPABILITY_ESS
;
2387 ifmgd
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
2388 IEEE80211_AUTH_ALG_SHARED_KEY
;
2389 ifmgd
->flags
|= IEEE80211_STA_CREATE_IBSS
|
2390 IEEE80211_STA_AUTO_BSSID_SEL
|
2391 IEEE80211_STA_AUTO_CHANNEL_SEL
;
2392 if (sdata
->local
->hw
.queues
>= 4)
2393 ifmgd
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2395 hw_flags
= sdata
->local
->hw
.flags
;
2397 if (hw_flags
& IEEE80211_HW_SUPPORTS_PS
) {
2398 ifmgd
->powersave
= CONFIG_MAC80211_DEFAULT_PS_VALUE
;
2399 sdata
->local
->hw
.conf
.dynamic_ps_timeout
= 500;
2403 /* configuration hooks */
2404 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
)
2406 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2407 struct ieee80211_local
*local
= sdata
->local
;
2409 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2412 if ((ifmgd
->flags
& (IEEE80211_STA_BSSID_SET
|
2413 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
2414 (ifmgd
->flags
& (IEEE80211_STA_SSID_SET
|
2415 IEEE80211_STA_AUTO_SSID_SEL
))) {
2417 if (ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
2418 ieee80211_set_disassoc(sdata
, true, true,
2419 WLAN_REASON_DEAUTH_LEAVING
);
2421 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) ||
2422 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
2423 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
2424 else if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
)
2425 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2426 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
2430 int ieee80211_sta_commit(struct ieee80211_sub_if_data
*sdata
)
2432 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2434 if (ifmgd
->ssid_len
)
2435 ifmgd
->flags
|= IEEE80211_STA_SSID_SET
;
2437 ifmgd
->flags
&= ~IEEE80211_STA_SSID_SET
;
2442 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
2444 struct ieee80211_if_managed
*ifmgd
;
2446 if (len
> IEEE80211_MAX_SSID_LEN
)
2449 ifmgd
= &sdata
->u
.mgd
;
2451 if (ifmgd
->ssid_len
!= len
|| memcmp(ifmgd
->ssid
, ssid
, len
) != 0) {
2453 * Do not use reassociation if SSID is changed (different ESS).
2455 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
2456 memset(ifmgd
->ssid
, 0, sizeof(ifmgd
->ssid
));
2457 memcpy(ifmgd
->ssid
, ssid
, len
);
2458 ifmgd
->ssid_len
= len
;
2461 return ieee80211_sta_commit(sdata
);
2464 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
2466 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2467 memcpy(ssid
, ifmgd
->ssid
, ifmgd
->ssid_len
);
2468 *len
= ifmgd
->ssid_len
;
2472 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2474 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2476 if (is_valid_ether_addr(bssid
)) {
2477 memcpy(ifmgd
->bssid
, bssid
, ETH_ALEN
);
2478 ifmgd
->flags
|= IEEE80211_STA_BSSID_SET
;
2480 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
2481 ifmgd
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2484 if (netif_running(sdata
->dev
))
2485 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BSSID
);
2487 return ieee80211_sta_commit(sdata
);
2490 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
,
2491 const char *ie
, size_t len
)
2493 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2495 kfree(ifmgd
->extra_ie
);
2497 ifmgd
->extra_ie
= NULL
;
2498 ifmgd
->extra_ie_len
= 0;
2501 ifmgd
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2502 if (!ifmgd
->extra_ie
) {
2503 ifmgd
->extra_ie_len
= 0;
2506 memcpy(ifmgd
->extra_ie
, ie
, len
);
2507 ifmgd
->extra_ie_len
= len
;
2511 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2513 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2514 sdata
->dev
->name
, reason
);
2516 ieee80211_set_disassoc(sdata
, true, true, reason
);
2520 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2522 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2524 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2525 sdata
->dev
->name
, reason
);
2527 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
))
2530 ieee80211_set_disassoc(sdata
, false, true, reason
);
2534 /* scan finished notification */
2535 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2537 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2539 /* Restart STA timers */
2541 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2542 ieee80211_restart_sta_timer(sdata
);
2546 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2547 unsigned long data
, void *dummy
)
2549 s32 latency_usec
= (s32
) data
;
2550 struct ieee80211_local
*local
=
2551 container_of(nb
, struct ieee80211_local
,
2552 network_latency_notifier
);
2554 mutex_lock(&local
->iflist_mtx
);
2555 ieee80211_recalc_ps(local
, latency_usec
);
2556 mutex_unlock(&local
->iflist_mtx
);