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 <net/mac80211.h>
21 #include <asm/unaligned.h>
23 #include "ieee80211_i.h"
27 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
28 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
29 #define IEEE80211_AUTH_MAX_TRIES 3
30 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
31 #define IEEE80211_ASSOC_MAX_TRIES 3
32 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
33 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
34 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
37 static int ecw2cw(int ecw
)
39 return (1 << ecw
) - 1;
42 static u8
*ieee80211_bss_get_ie(struct ieee80211_bss
*bss
, u8 ie
)
46 pos
= bss
->cbss
.information_elements
;
49 end
= pos
+ bss
->cbss
.len_information_elements
;
51 while (pos
+ 1 < end
) {
52 if (pos
+ 2 + pos
[1] > end
)
62 static int ieee80211_compatible_rates(struct ieee80211_bss
*bss
,
63 struct ieee80211_supported_band
*sband
,
69 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
70 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
72 for (j
= 0; j
< sband
->n_bitrates
; j
++)
73 if (sband
->bitrates
[j
].bitrate
== rate
) {
84 * ieee80211_enable_ht should be called only after the operating band
85 * has been determined as ht configuration depends on the hw's
86 * HT abilities for a specific band.
88 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
89 struct ieee80211_ht_info
*hti
,
92 struct ieee80211_local
*local
= sdata
->local
;
93 struct ieee80211_supported_band
*sband
;
94 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
95 struct ieee80211_bss_ht_conf ht
;
98 bool enable_ht
= true, ht_changed
;
99 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
101 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
103 memset(&ht
, 0, sizeof(ht
));
105 /* HT is not supported */
106 if (!sband
->ht_cap
.ht_supported
)
109 /* check that channel matches the right operating channel */
110 if (local
->hw
.conf
.channel
->center_freq
!=
111 ieee80211_channel_to_frequency(hti
->control_chan
))
115 channel_type
= NL80211_CHAN_HT20
;
117 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
118 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
119 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
120 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
121 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
122 channel_type
= NL80211_CHAN_HT40PLUS
;
124 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
125 channel_type
= NL80211_CHAN_HT40MINUS
;
131 ht_changed
= conf_is_ht(&local
->hw
.conf
) != enable_ht
||
132 channel_type
!= local
->hw
.conf
.channel_type
;
134 local
->oper_channel_type
= channel_type
;
137 /* channel_type change automatically detected */
138 ieee80211_hw_config(local
, 0);
142 sta
= sta_info_get(local
, ifmgd
->bssid
);
144 rate_control_rate_update(local
, sband
, sta
,
145 IEEE80211_RC_HT_CHANGED
);
155 ht
.operation_mode
= le16_to_cpu(hti
->operation_mode
);
157 /* if bss configuration changed store the new one */
158 if (memcmp(&sdata
->vif
.bss_conf
.ht
, &ht
, sizeof(ht
))) {
159 changed
|= BSS_CHANGED_HT
;
160 sdata
->vif
.bss_conf
.ht
= ht
;
166 /* frame sending functions */
168 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
170 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
171 struct ieee80211_local
*local
= sdata
->local
;
173 struct ieee80211_mgmt
*mgmt
;
174 u8
*pos
, *ies
, *ht_ie
;
175 int i
, len
, count
, rates_len
, supp_rates_len
;
177 struct ieee80211_bss
*bss
;
179 struct ieee80211_supported_band
*sband
;
182 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
183 sizeof(*mgmt
) + 200 + ifmgd
->extra_ie_len
+
186 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
187 "frame\n", sdata
->dev
->name
);
190 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
192 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
194 capab
= ifmgd
->capab
;
196 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
197 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
198 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
199 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
200 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
203 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
204 local
->hw
.conf
.channel
->center_freq
,
205 ifmgd
->ssid
, ifmgd
->ssid_len
);
207 if (bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
)
208 capab
|= WLAN_CAPABILITY_PRIVACY
;
212 /* get all rates supported by the device and the AP as
213 * some APs don't like getting a superset of their rates
214 * in the association request (e.g. D-Link DAP 1353 in
216 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
218 if ((bss
->cbss
.capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
219 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
220 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
222 ieee80211_rx_bss_put(local
, bss
);
225 rates_len
= sband
->n_bitrates
;
228 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
230 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
231 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
232 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
234 if (ifmgd
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
236 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
237 IEEE80211_STYPE_REASSOC_REQ
);
238 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
239 mgmt
->u
.reassoc_req
.listen_interval
=
240 cpu_to_le16(local
->hw
.conf
.listen_interval
);
241 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifmgd
->prev_bssid
,
245 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
246 IEEE80211_STYPE_ASSOC_REQ
);
247 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
248 mgmt
->u
.assoc_req
.listen_interval
=
249 cpu_to_le16(local
->hw
.conf
.listen_interval
);
253 ies
= pos
= skb_put(skb
, 2 + ifmgd
->ssid_len
);
254 *pos
++ = WLAN_EID_SSID
;
255 *pos
++ = ifmgd
->ssid_len
;
256 memcpy(pos
, ifmgd
->ssid
, ifmgd
->ssid_len
);
258 /* add all rates which were marked to be used above */
259 supp_rates_len
= rates_len
;
260 if (supp_rates_len
> 8)
263 len
= sband
->n_bitrates
;
264 pos
= skb_put(skb
, supp_rates_len
+ 2);
265 *pos
++ = WLAN_EID_SUPP_RATES
;
266 *pos
++ = supp_rates_len
;
269 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
270 if (BIT(i
) & rates
) {
271 int rate
= sband
->bitrates
[i
].bitrate
;
272 *pos
++ = (u8
) (rate
/ 5);
278 if (rates_len
> count
) {
279 pos
= skb_put(skb
, rates_len
- count
+ 2);
280 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
281 *pos
++ = rates_len
- count
;
283 for (i
++; i
< sband
->n_bitrates
; i
++) {
284 if (BIT(i
) & rates
) {
285 int rate
= sband
->bitrates
[i
].bitrate
;
286 *pos
++ = (u8
) (rate
/ 5);
291 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
292 /* 1. power capabilities */
293 pos
= skb_put(skb
, 4);
294 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
296 *pos
++ = 0; /* min tx power */
297 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
299 /* 2. supported channels */
300 /* TODO: get this in reg domain format */
301 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
302 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
303 *pos
++ = 2 * sband
->n_channels
;
304 for (i
= 0; i
< sband
->n_channels
; i
++) {
305 *pos
++ = ieee80211_frequency_to_channel(
306 sband
->channels
[i
].center_freq
);
307 *pos
++ = 1; /* one channel in the subband*/
311 if (ifmgd
->extra_ie
) {
312 pos
= skb_put(skb
, ifmgd
->extra_ie_len
);
313 memcpy(pos
, ifmgd
->extra_ie
, ifmgd
->extra_ie_len
);
316 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
317 pos
= skb_put(skb
, 9);
318 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
319 *pos
++ = 7; /* len */
320 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
323 *pos
++ = 2; /* WME */
324 *pos
++ = 0; /* WME info */
325 *pos
++ = 1; /* WME ver */
329 /* wmm support is a must to HT */
331 * IEEE802.11n does not allow TKIP/WEP as pairwise
332 * ciphers in HT mode. We still associate in non-ht
333 * mode (11a/b/g) if any one of these ciphers is
334 * configured as pairwise.
336 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
337 sband
->ht_cap
.ht_supported
&&
338 (ht_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_INFORMATION
)) &&
339 ht_ie
[1] >= sizeof(struct ieee80211_ht_info
) &&
340 (!(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))) {
341 struct ieee80211_ht_info
*ht_info
=
342 (struct ieee80211_ht_info
*)(ht_ie
+ 2);
343 u16 cap
= sband
->ht_cap
.cap
;
345 u32 flags
= local
->hw
.conf
.channel
->flags
;
347 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
348 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
349 if (flags
& IEEE80211_CHAN_NO_FAT_ABOVE
) {
350 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
351 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
354 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
355 if (flags
& IEEE80211_CHAN_NO_FAT_BELOW
) {
356 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
357 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
362 tmp
= cpu_to_le16(cap
);
363 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
364 *pos
++ = WLAN_EID_HT_CAPABILITY
;
365 *pos
++ = sizeof(struct ieee80211_ht_cap
);
366 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
367 memcpy(pos
, &tmp
, sizeof(u16
));
369 /* TODO: needs a define here for << 2 */
370 *pos
++ = sband
->ht_cap
.ampdu_factor
|
371 (sband
->ht_cap
.ampdu_density
<< 2);
372 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
375 kfree(ifmgd
->assocreq_ies
);
376 ifmgd
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
377 ifmgd
->assocreq_ies
= kmalloc(ifmgd
->assocreq_ies_len
, GFP_KERNEL
);
378 if (ifmgd
->assocreq_ies
)
379 memcpy(ifmgd
->assocreq_ies
, ies
, ifmgd
->assocreq_ies_len
);
381 ieee80211_tx_skb(sdata
, skb
, 0);
385 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
386 u16 stype
, u16 reason
)
388 struct ieee80211_local
*local
= sdata
->local
;
389 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
391 struct ieee80211_mgmt
*mgmt
;
393 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
395 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
396 "deauth/disassoc frame\n", sdata
->dev
->name
);
399 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
401 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
403 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
404 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
405 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
406 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
408 /* u.deauth.reason_code == u.disassoc.reason_code */
409 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
411 if (stype
== IEEE80211_STYPE_DEAUTH
)
412 cfg80211_send_deauth(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
414 cfg80211_send_disassoc(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
415 ieee80211_tx_skb(sdata
, skb
, ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
);
418 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
419 struct ieee80211_sub_if_data
*sdata
)
421 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
422 struct ieee80211_pspoll
*pspoll
;
426 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
428 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
429 "pspoll frame\n", sdata
->dev
->name
);
432 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
434 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
435 memset(pspoll
, 0, sizeof(*pspoll
));
436 fc
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
| IEEE80211_FCTL_PM
;
437 pspoll
->frame_control
= cpu_to_le16(fc
);
438 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
440 /* aid in PS-Poll has its two MSBs each set to 1 */
441 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
443 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
444 memcpy(pspoll
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
446 ieee80211_tx_skb(sdata
, skb
, 0);
449 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
450 struct ieee80211_sub_if_data
*sdata
,
454 struct ieee80211_hdr
*nullfunc
;
457 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
460 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
462 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
463 "frame\n", sdata
->dev
->name
);
466 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
468 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
469 memset(nullfunc
, 0, 24);
470 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
471 IEEE80211_FCTL_TODS
);
473 fc
|= cpu_to_le16(IEEE80211_FCTL_PM
);
474 nullfunc
->frame_control
= fc
;
475 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
476 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
477 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
479 ieee80211_tx_skb(sdata
, skb
, 0);
483 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
484 struct ieee80211_sub_if_data
*sdata
)
486 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
488 if (conf
->dynamic_ps_timeout
> 0 &&
489 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
490 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
491 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
493 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
494 ieee80211_send_nullfunc(local
, sdata
, 1);
495 conf
->flags
|= IEEE80211_CONF_PS
;
496 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
500 static void ieee80211_change_ps(struct ieee80211_local
*local
)
502 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
504 if (local
->ps_sdata
) {
505 if (!(local
->ps_sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
))
508 ieee80211_enable_ps(local
, local
->ps_sdata
);
509 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
510 conf
->flags
&= ~IEEE80211_CONF_PS
;
511 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
512 del_timer_sync(&local
->dynamic_ps_timer
);
513 cancel_work_sync(&local
->dynamic_ps_enable_work
);
517 /* need to hold RTNL or interface lock */
518 void ieee80211_recalc_ps(struct ieee80211_local
*local
)
520 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
523 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
524 local
->ps_sdata
= NULL
;
528 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
529 if (!netif_running(sdata
->dev
))
531 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
537 if (count
== 1 && found
->u
.mgd
.powersave
)
538 local
->ps_sdata
= found
;
540 local
->ps_sdata
= NULL
;
542 ieee80211_change_ps(local
);
545 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
547 struct ieee80211_local
*local
=
548 container_of(work
, struct ieee80211_local
,
549 dynamic_ps_disable_work
);
551 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
552 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
553 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
556 ieee80211_wake_queues_by_reason(&local
->hw
,
557 IEEE80211_QUEUE_STOP_REASON_PS
);
560 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
562 struct ieee80211_local
*local
=
563 container_of(work
, struct ieee80211_local
,
564 dynamic_ps_enable_work
);
565 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
567 /* can only happen when PS was just disabled anyway */
571 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
574 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
575 ieee80211_send_nullfunc(local
, sdata
, 1);
577 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
578 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
581 void ieee80211_dynamic_ps_timer(unsigned long data
)
583 struct ieee80211_local
*local
= (void *) data
;
585 queue_work(local
->hw
.workqueue
, &local
->dynamic_ps_enable_work
);
589 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
590 struct ieee80211_if_managed
*ifmgd
,
591 u8
*wmm_param
, size_t wmm_param_len
)
593 struct ieee80211_tx_queue_params params
;
598 if (!(ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
))
604 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
606 count
= wmm_param
[6] & 0x0f;
607 if (count
== ifmgd
->wmm_last_param_set
)
609 ifmgd
->wmm_last_param_set
= count
;
612 left
= wmm_param_len
- 8;
614 memset(¶ms
, 0, sizeof(params
));
617 for (; left
>= 4; left
-= 4, pos
+= 4) {
618 int aci
= (pos
[0] >> 5) & 0x03;
619 int acm
= (pos
[0] >> 4) & 0x01;
626 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
631 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
636 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
642 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
646 params
.aifs
= pos
[0] & 0x0f;
647 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
648 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
649 params
.txop
= get_unaligned_le16(pos
+ 2);
650 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
651 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
652 "cWmin=%d cWmax=%d txop=%d\n",
653 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
654 params
.cw_max
, params
.txop
);
656 if (local
->ops
->conf_tx
&&
657 local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
658 printk(KERN_DEBUG
"%s: failed to set TX queue "
659 "parameters for queue %d\n", local
->mdev
->name
, queue
);
664 static bool ieee80211_check_tim(struct ieee802_11_elems
*elems
, u16 aid
)
667 u8 index
, indexn1
, indexn2
;
668 struct ieee80211_tim_ie
*tim
= (struct ieee80211_tim_ie
*) elems
->tim
;
670 if (unlikely(!tim
|| elems
->tim_len
< 4))
675 mask
= 1 << (aid
& 7);
677 indexn1
= tim
->bitmap_ctrl
& 0xfe;
678 indexn2
= elems
->tim_len
+ indexn1
- 4;
680 if (index
< indexn1
|| index
> indexn2
)
685 return !!(tim
->virtual_map
[index
] & mask
);
688 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
689 u16 capab
, bool erp_valid
, u8 erp
)
691 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
692 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
693 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
697 bool use_short_preamble
;
701 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
702 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
704 use_protection
= false;
705 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
708 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
710 if (use_protection
!= bss_conf
->use_cts_prot
) {
711 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
712 if (net_ratelimit()) {
713 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID=%pM)\n",
715 use_protection
? "enabled" : "disabled",
719 bss_conf
->use_cts_prot
= use_protection
;
720 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
723 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
724 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
725 if (net_ratelimit()) {
726 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
729 use_short_preamble
? "short" : "long",
733 bss_conf
->use_short_preamble
= use_short_preamble
;
734 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
737 if (use_short_slot
!= bss_conf
->use_short_slot
) {
738 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
739 if (net_ratelimit()) {
740 printk(KERN_DEBUG
"%s: switched to %s slot time"
743 use_short_slot
? "short" : "long",
747 bss_conf
->use_short_slot
= use_short_slot
;
748 changed
|= BSS_CHANGED_ERP_SLOT
;
754 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
)
756 union iwreq_data wrqu
;
758 memset(&wrqu
, 0, sizeof(wrqu
));
759 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
)
760 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
761 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
762 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
765 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
)
767 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
771 union iwreq_data wrqu
;
773 if (!ifmgd
->assocreq_ies
&& !ifmgd
->assocresp_ies
)
776 buf
= kmalloc(50 + 2 * (ifmgd
->assocreq_ies_len
+
777 ifmgd
->assocresp_ies_len
), GFP_KERNEL
);
781 len
= sprintf(buf
, "ASSOCINFO(");
782 if (ifmgd
->assocreq_ies
) {
783 len
+= sprintf(buf
+ len
, "ReqIEs=");
784 for (i
= 0; i
< ifmgd
->assocreq_ies_len
; i
++) {
785 len
+= sprintf(buf
+ len
, "%02x",
786 ifmgd
->assocreq_ies
[i
]);
789 if (ifmgd
->assocresp_ies
) {
790 if (ifmgd
->assocreq_ies
)
791 len
+= sprintf(buf
+ len
, " ");
792 len
+= sprintf(buf
+ len
, "RespIEs=");
793 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
794 len
+= sprintf(buf
+ len
, "%02x",
795 ifmgd
->assocresp_ies
[i
]);
798 len
+= sprintf(buf
+ len
, ")");
800 if (len
> IW_CUSTOM_MAX
) {
801 len
= sprintf(buf
, "ASSOCRESPIE=");
802 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
803 len
+= sprintf(buf
+ len
, "%02x",
804 ifmgd
->assocresp_ies
[i
]);
808 if (len
<= IW_CUSTOM_MAX
) {
809 memset(&wrqu
, 0, sizeof(wrqu
));
810 wrqu
.data
.length
= len
;
811 wireless_send_event(sdata
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
818 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
819 u32 bss_info_changed
)
821 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
822 struct ieee80211_local
*local
= sdata
->local
;
823 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
825 struct ieee80211_bss
*bss
;
827 bss_info_changed
|= BSS_CHANGED_ASSOC
;
828 ifmgd
->flags
|= IEEE80211_STA_ASSOCIATED
;
830 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
831 conf
->channel
->center_freq
,
832 ifmgd
->ssid
, ifmgd
->ssid_len
);
834 /* set timing information */
835 sdata
->vif
.bss_conf
.beacon_int
= bss
->cbss
.beacon_interval
;
836 sdata
->vif
.bss_conf
.timestamp
= bss
->cbss
.tsf
;
837 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
839 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
840 bss
->cbss
.capability
, bss
->has_erp_value
, bss
->erp_value
);
842 cfg80211_hold_bss(&bss
->cbss
);
844 ieee80211_rx_bss_put(local
, bss
);
847 ifmgd
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
848 memcpy(ifmgd
->prev_bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
849 ieee80211_sta_send_associnfo(sdata
);
851 ifmgd
->last_probe
= jiffies
;
852 ieee80211_led_assoc(local
, 1);
854 sdata
->vif
.bss_conf
.assoc
= 1;
856 * For now just always ask the driver to update the basic rateset
857 * when we have associated, we aren't checking whether it actually
860 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
861 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
863 /* will be same as sdata */
865 ieee80211_enable_ps(local
, sdata
);
867 netif_tx_start_all_queues(sdata
->dev
);
868 netif_carrier_on(sdata
->dev
);
870 ieee80211_sta_send_apinfo(sdata
);
873 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
)
875 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
876 struct ieee80211_local
*local
= sdata
->local
;
878 ifmgd
->direct_probe_tries
++;
879 if (ifmgd
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
880 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
881 sdata
->dev
->name
, ifmgd
->bssid
);
882 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
883 ieee80211_sta_send_apinfo(sdata
);
886 * Most likely AP is not in the range so remove the
887 * bss information associated to the AP
889 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
890 sdata
->local
->hw
.conf
.channel
->center_freq
,
891 ifmgd
->ssid
, ifmgd
->ssid_len
);
894 * We might have a pending scan which had no chance to run yet
895 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
896 * Hence, queue the STAs work again
898 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
902 printk(KERN_DEBUG
"%s: direct probe to AP %pM try %d\n",
903 sdata
->dev
->name
, ifmgd
->bssid
,
904 ifmgd
->direct_probe_tries
);
906 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
908 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifmgd
->request
);
910 /* Direct probe is sent to broadcast address as some APs
911 * will not answer to direct packet in unassociated state.
913 ieee80211_send_probe_req(sdata
, NULL
,
914 ifmgd
->ssid
, ifmgd
->ssid_len
, NULL
, 0);
916 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
920 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
)
922 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
923 struct ieee80211_local
*local
= sdata
->local
;
928 if (ifmgd
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
929 printk(KERN_DEBUG
"%s: authentication with AP %pM"
931 sdata
->dev
->name
, ifmgd
->bssid
);
932 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
933 ieee80211_sta_send_apinfo(sdata
);
934 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
935 sdata
->local
->hw
.conf
.channel
->center_freq
,
936 ifmgd
->ssid
, ifmgd
->ssid_len
);
939 * We might have a pending scan which had no chance to run yet
940 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
941 * Hence, queue the STAs work again
943 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
947 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
948 printk(KERN_DEBUG
"%s: authenticate with AP %pM\n",
949 sdata
->dev
->name
, ifmgd
->bssid
);
951 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
952 ies
= ifmgd
->sme_auth_ie
;
953 ies_len
= ifmgd
->sme_auth_ie_len
;
958 ieee80211_send_auth(sdata
, 1, ifmgd
->auth_alg
, ies
, ies_len
,
960 ifmgd
->auth_transaction
= 2;
962 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
966 * The disassoc 'reason' argument can be either our own reason
967 * if self disconnected or a reason code from the AP.
969 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
970 bool deauth
, bool self_disconnected
,
973 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
974 struct ieee80211_local
*local
= sdata
->local
;
975 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
976 struct ieee80211_bss
*bss
;
977 struct sta_info
*sta
;
978 u32 changed
= 0, config_changed
= 0;
982 sta
= sta_info_get(local
, ifmgd
->bssid
);
989 ifmgd
->direct_probe_tries
= 0;
990 ifmgd
->auth_tries
= 0;
992 ifmgd
->assoc_scan_tries
= 0;
993 ifmgd
->assoc_tries
= 0;
995 netif_tx_stop_all_queues(sdata
->dev
);
996 netif_carrier_off(sdata
->dev
);
998 ieee80211_sta_tear_down_BA_sessions(sta
);
1000 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
1001 conf
->channel
->center_freq
,
1002 ifmgd
->ssid
, ifmgd
->ssid_len
);
1005 cfg80211_unhold_bss(&bss
->cbss
);
1006 ieee80211_rx_bss_put(local
, bss
);
1009 if (self_disconnected
) {
1011 ieee80211_send_deauth_disassoc(sdata
,
1012 IEEE80211_STYPE_DEAUTH
, reason
);
1014 ieee80211_send_deauth_disassoc(sdata
,
1015 IEEE80211_STYPE_DISASSOC
, reason
);
1018 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
1019 changed
|= ieee80211_reset_erp_info(sdata
);
1021 ieee80211_led_assoc(local
, 0);
1022 changed
|= BSS_CHANGED_ASSOC
;
1023 sdata
->vif
.bss_conf
.assoc
= false;
1025 ieee80211_sta_send_apinfo(sdata
);
1027 if (self_disconnected
|| reason
== WLAN_REASON_DISASSOC_STA_HAS_LEFT
) {
1028 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1029 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1030 sdata
->local
->hw
.conf
.channel
->center_freq
,
1031 ifmgd
->ssid
, ifmgd
->ssid_len
);
1036 /* channel(_type) changes are handled by ieee80211_hw_config */
1037 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
1039 local
->power_constr_level
= 0;
1041 del_timer_sync(&local
->dynamic_ps_timer
);
1042 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1044 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1045 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1046 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1049 ieee80211_hw_config(local
, config_changed
);
1050 ieee80211_bss_info_change_notify(sdata
, changed
);
1054 sta
= sta_info_get(local
, ifmgd
->bssid
);
1060 sta_info_unlink(&sta
);
1064 sta_info_destroy(sta
);
1067 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
1069 if (!sdata
|| !sdata
->default_key
||
1070 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
1075 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
)
1077 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1078 struct ieee80211_local
*local
= sdata
->local
;
1079 struct ieee80211_bss
*bss
;
1082 int privacy_invoked
;
1084 if (!ifmgd
|| (ifmgd
->flags
& IEEE80211_STA_EXT_SME
))
1087 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
1088 local
->hw
.conf
.channel
->center_freq
,
1089 ifmgd
->ssid
, ifmgd
->ssid_len
);
1093 bss_privacy
= !!(bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
);
1094 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
1095 privacy_invoked
= !!(ifmgd
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
1097 ieee80211_rx_bss_put(local
, bss
);
1099 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
1105 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
)
1107 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1108 struct ieee80211_local
*local
= sdata
->local
;
1110 ifmgd
->assoc_tries
++;
1111 if (ifmgd
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1112 printk(KERN_DEBUG
"%s: association with AP %pM"
1114 sdata
->dev
->name
, ifmgd
->bssid
);
1115 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1116 ieee80211_sta_send_apinfo(sdata
);
1117 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1118 sdata
->local
->hw
.conf
.channel
->center_freq
,
1119 ifmgd
->ssid
, ifmgd
->ssid_len
);
1121 * We might have a pending scan which had no chance to run yet
1122 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1123 * Hence, queue the STAs work again
1125 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1129 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1130 printk(KERN_DEBUG
"%s: associate with AP %pM\n",
1131 sdata
->dev
->name
, ifmgd
->bssid
);
1132 if (ieee80211_privacy_mismatch(sdata
)) {
1133 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
1134 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
1135 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1139 ieee80211_send_assoc(sdata
);
1141 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
1144 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1145 struct ieee80211_hdr
*hdr
)
1148 * We can postpone the mgd.timer whenever receiving unicast frames
1149 * from AP because we know that the connection is working both ways
1150 * at that time. But multicast frames (and hence also beacons) must
1151 * be ignored here, because we need to trigger the timer during
1152 * data idle periods for sending the periodical probe request to
1155 if (!is_multicast_ether_addr(hdr
->addr1
))
1156 mod_timer(&sdata
->u
.mgd
.timer
,
1157 jiffies
+ IEEE80211_MONITORING_INTERVAL
);
1160 void ieee80211_beacon_loss_work(struct work_struct
*work
)
1162 struct ieee80211_sub_if_data
*sdata
=
1163 container_of(work
, struct ieee80211_sub_if_data
,
1164 u
.mgd
.beacon_loss_work
);
1165 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1167 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1168 if (net_ratelimit()) {
1169 printk(KERN_DEBUG
"%s: driver reports beacon loss from AP %pM "
1170 "- sending probe request\n", sdata
->dev
->name
,
1171 sdata
->u
.mgd
.bssid
);
1175 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1176 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1177 ifmgd
->ssid_len
, NULL
, 0);
1179 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_MONITORING_INTERVAL
);
1182 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1184 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1186 queue_work(sdata
->local
->hw
.workqueue
,
1187 &sdata
->u
.mgd
.beacon_loss_work
);
1189 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1191 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
)
1193 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1194 struct ieee80211_local
*local
= sdata
->local
;
1195 struct sta_info
*sta
;
1196 bool disassoc
= false;
1198 /* TODO: start monitoring current AP signal quality and number of
1199 * missed beacons. Scan other channels every now and then and search
1200 * for better APs. */
1201 /* TODO: remove expired BSSes */
1203 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
1207 sta
= sta_info_get(local
, ifmgd
->bssid
);
1209 printk(KERN_DEBUG
"%s: No STA entry for own AP %pM\n",
1210 sdata
->dev
->name
, ifmgd
->bssid
);
1215 if ((ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
) &&
1216 time_after(jiffies
, sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
1217 printk(KERN_DEBUG
"%s: no probe response from AP %pM "
1218 "- disassociating\n",
1219 sdata
->dev
->name
, ifmgd
->bssid
);
1221 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1226 * Beacon filtering is only enabled with power save and then the
1227 * stack should not check for beacon loss.
1229 if (!((local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
) &&
1230 (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) &&
1232 ifmgd
->last_beacon
+ IEEE80211_MONITORING_INTERVAL
)) {
1233 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1234 if (net_ratelimit()) {
1235 printk(KERN_DEBUG
"%s: beacon loss from AP %pM "
1236 "- sending probe request\n",
1237 sdata
->dev
->name
, ifmgd
->bssid
);
1240 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1241 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1242 ifmgd
->ssid_len
, NULL
, 0);
1247 if (time_after(jiffies
, sta
->last_rx
+ IEEE80211_PROBE_IDLE_TIME
)) {
1248 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1249 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1250 ifmgd
->ssid_len
, NULL
, 0);
1257 ieee80211_set_disassoc(sdata
, true, true,
1258 WLAN_REASON_PREV_AUTH_NOT_VALID
);
1260 mod_timer(&ifmgd
->timer
, jiffies
+
1261 IEEE80211_MONITORING_INTERVAL
);
1265 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
)
1267 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1269 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1270 ifmgd
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1271 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1272 /* Wait for SME to request association */
1273 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1275 ieee80211_associate(sdata
);
1279 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1280 struct ieee80211_mgmt
*mgmt
,
1284 struct ieee802_11_elems elems
;
1286 pos
= mgmt
->u
.auth
.variable
;
1287 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1288 if (!elems
.challenge
)
1290 ieee80211_send_auth(sdata
, 3, sdata
->u
.mgd
.auth_alg
,
1291 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1292 sdata
->u
.mgd
.bssid
, 1);
1293 sdata
->u
.mgd
.auth_transaction
= 4;
1296 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1297 struct ieee80211_mgmt
*mgmt
,
1300 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1301 u16 auth_alg
, auth_transaction
, status_code
;
1303 if (ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
)
1309 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1312 if (memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1315 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1316 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1317 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1319 if (auth_alg
!= ifmgd
->auth_alg
||
1320 auth_transaction
!= ifmgd
->auth_transaction
)
1323 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1324 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1326 const int num_algs
= ARRAY_SIZE(algs
);
1328 algs
[0] = algs
[1] = algs
[2] = 0xff;
1329 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1330 algs
[0] = WLAN_AUTH_OPEN
;
1331 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1332 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1333 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1334 algs
[2] = WLAN_AUTH_LEAP
;
1335 if (ifmgd
->auth_alg
== WLAN_AUTH_OPEN
)
1337 else if (ifmgd
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1341 for (i
= 0; i
< num_algs
; i
++) {
1343 if (pos
>= num_algs
)
1345 if (algs
[pos
] == ifmgd
->auth_alg
||
1348 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1349 !ieee80211_sta_wep_configured(sdata
))
1351 ifmgd
->auth_alg
= algs
[pos
];
1358 switch (ifmgd
->auth_alg
) {
1359 case WLAN_AUTH_OPEN
:
1360 case WLAN_AUTH_LEAP
:
1362 ieee80211_auth_completed(sdata
);
1363 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1365 case WLAN_AUTH_SHARED_KEY
:
1366 if (ifmgd
->auth_transaction
== 4) {
1367 ieee80211_auth_completed(sdata
);
1368 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1370 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1376 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1377 struct ieee80211_mgmt
*mgmt
,
1380 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1386 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1389 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1391 if (ifmgd
->flags
& IEEE80211_STA_AUTHENTICATED
)
1392 printk(KERN_DEBUG
"%s: deauthenticated (Reason: %u)\n",
1393 sdata
->dev
->name
, reason_code
);
1395 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1396 (ifmgd
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1397 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1398 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)) {
1399 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1400 mod_timer(&ifmgd
->timer
, jiffies
+
1401 IEEE80211_RETRY_AUTH_INTERVAL
);
1404 ieee80211_set_disassoc(sdata
, true, false, 0);
1405 ifmgd
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1406 cfg80211_send_deauth(sdata
->dev
, (u8
*) mgmt
, len
);
1410 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1411 struct ieee80211_mgmt
*mgmt
,
1414 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1420 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1423 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1425 if (ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
)
1426 printk(KERN_DEBUG
"%s: disassociated (Reason: %u)\n",
1427 sdata
->dev
->name
, reason_code
);
1429 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1430 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1431 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1432 mod_timer(&ifmgd
->timer
, jiffies
+
1433 IEEE80211_RETRY_AUTH_INTERVAL
);
1436 ieee80211_set_disassoc(sdata
, false, false, reason_code
);
1437 cfg80211_send_disassoc(sdata
->dev
, (u8
*) mgmt
, len
);
1441 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1442 struct ieee80211_mgmt
*mgmt
,
1446 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1447 struct ieee80211_local
*local
= sdata
->local
;
1448 struct ieee80211_supported_band
*sband
;
1449 struct sta_info
*sta
;
1450 u32 rates
, basic_rates
;
1451 u16 capab_info
, status_code
, aid
;
1452 struct ieee802_11_elems elems
;
1453 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1457 bool have_higher_than_11mbit
= false, newsta
= false;
1458 u16 ap_ht_cap_flags
;
1460 /* AssocResp and ReassocResp have identical structure, so process both
1461 * of them in this function. */
1463 if (ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1469 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1472 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1473 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1474 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1476 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1477 "status=%d aid=%d)\n",
1478 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1479 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1481 pos
= mgmt
->u
.assoc_resp
.variable
;
1482 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1484 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1485 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1486 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1488 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1489 ms
= tu
* 1024 / 1000;
1490 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1491 "comeback duration %u TU (%u ms)\n",
1492 sdata
->dev
->name
, tu
, ms
);
1493 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1494 mod_timer(&ifmgd
->timer
,
1495 jiffies
+ msecs_to_jiffies(ms
));
1499 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1500 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1501 sdata
->dev
->name
, status_code
);
1502 /* if this was a reassociation, ensure we try a "full"
1503 * association next time. This works around some broken APs
1504 * which do not correctly reject reassociation requests. */
1505 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1506 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1507 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1508 /* Wait for SME to decide what to do next */
1509 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1514 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1515 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1516 "set\n", sdata
->dev
->name
, aid
);
1517 aid
&= ~(BIT(15) | BIT(14));
1519 if (!elems
.supp_rates
) {
1520 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1525 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1527 ifmgd
->ap_capab
= capab_info
;
1529 kfree(ifmgd
->assocresp_ies
);
1530 ifmgd
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1531 ifmgd
->assocresp_ies
= kmalloc(ifmgd
->assocresp_ies_len
, GFP_KERNEL
);
1532 if (ifmgd
->assocresp_ies
)
1533 memcpy(ifmgd
->assocresp_ies
, pos
, ifmgd
->assocresp_ies_len
);
1537 /* Add STA entry for the AP */
1538 sta
= sta_info_get(local
, ifmgd
->bssid
);
1542 sta
= sta_info_alloc(sdata
, ifmgd
->bssid
, GFP_ATOMIC
);
1544 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1545 " the AP\n", sdata
->dev
->name
);
1550 /* update new sta with its last rx activity */
1551 sta
->last_rx
= jiffies
;
1555 * FIXME: Do we really need to update the sta_info's information here?
1556 * We already know about the AP (we found it in our list) so it
1557 * should already be filled with the right info, no?
1558 * As is stands, all this is racy because typically we assume
1559 * the information that is filled in here (except flags) doesn't
1560 * change while a STA structure is alive. As such, it should move
1561 * to between the sta_info_alloc() and sta_info_insert() above.
1564 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
1565 WLAN_STA_AUTHORIZED
);
1569 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1571 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1572 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1573 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1576 have_higher_than_11mbit
= true;
1578 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1579 if (sband
->bitrates
[j
].bitrate
== rate
) {
1582 basic_rates
|= BIT(j
);
1588 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1589 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1590 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1593 have_higher_than_11mbit
= true;
1595 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1596 if (sband
->bitrates
[j
].bitrate
== rate
) {
1599 basic_rates
|= BIT(j
);
1605 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1606 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1608 /* cf. IEEE 802.11 9.2.12 */
1609 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1610 have_higher_than_11mbit
)
1611 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1613 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1615 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1616 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1617 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1618 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1620 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1622 rate_control_rate_init(sta
);
1624 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1625 set_sta_flags(sta
, WLAN_STA_MFP
);
1627 if (elems
.wmm_param
)
1628 set_sta_flags(sta
, WLAN_STA_WME
);
1631 int err
= sta_info_insert(sta
);
1633 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1634 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1642 if (elems
.wmm_param
)
1643 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1644 elems
.wmm_param_len
);
1646 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1647 (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
1648 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1649 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1652 /* set AID and assoc capability,
1653 * ieee80211_set_associated() will tell the driver */
1654 bss_conf
->aid
= aid
;
1655 bss_conf
->assoc_capability
= capab_info
;
1656 ieee80211_set_associated(sdata
, changed
);
1659 * initialise the time of last beacon to be the association time,
1660 * otherwise beacon loss check will trigger immediately
1662 ifmgd
->last_beacon
= jiffies
;
1664 ieee80211_associated(sdata
);
1665 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1669 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1670 struct ieee80211_mgmt
*mgmt
,
1672 struct ieee80211_rx_status
*rx_status
,
1673 struct ieee802_11_elems
*elems
,
1676 struct ieee80211_local
*local
= sdata
->local
;
1678 struct ieee80211_bss
*bss
;
1679 struct ieee80211_channel
*channel
;
1681 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1682 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1684 freq
= rx_status
->freq
;
1686 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1688 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1691 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1696 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1697 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
) == 0)) {
1698 struct ieee80211_channel_sw_ie
*sw_elem
=
1699 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1700 ieee80211_process_chanswitch(sdata
, sw_elem
, bss
);
1703 ieee80211_rx_bss_put(local
, bss
);
1707 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1708 struct ieee80211_mgmt
*mgmt
,
1710 struct ieee80211_rx_status
*rx_status
)
1712 struct ieee80211_if_managed
*ifmgd
;
1714 struct ieee802_11_elems elems
;
1716 ifmgd
= &sdata
->u
.mgd
;
1718 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1719 return; /* ignore ProbeResp to foreign address */
1721 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1725 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1728 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1730 /* direct probe may be part of the association flow */
1731 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
1733 printk(KERN_DEBUG
"%s direct probe responded\n",
1735 ieee80211_authenticate(sdata
);
1738 if (ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
)
1739 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1742 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1743 struct ieee80211_mgmt
*mgmt
,
1745 struct ieee80211_rx_status
*rx_status
)
1747 struct ieee80211_if_managed
*ifmgd
;
1749 struct ieee802_11_elems elems
;
1750 struct ieee80211_local
*local
= sdata
->local
;
1752 bool erp_valid
, directed_tim
;
1755 /* Process beacon from the current BSS */
1756 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1760 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
, &elems
);
1762 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, true);
1764 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1767 ifmgd
= &sdata
->u
.mgd
;
1769 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1770 memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1773 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1776 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1777 elems
.wmm_param_len
);
1779 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1780 directed_tim
= ieee80211_check_tim(&elems
, ifmgd
->aid
);
1783 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1784 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1785 ieee80211_hw_config(local
,
1786 IEEE80211_CONF_CHANGE_PS
);
1787 ieee80211_send_nullfunc(local
, sdata
, 0);
1789 local
->pspolling
= true;
1792 * Here is assumed that the driver will be
1793 * able to send ps-poll frame and receive a
1794 * response even though power save mode is
1795 * enabled, but some drivers might require
1796 * to disable power save here. This needs
1797 * to be investigated.
1799 ieee80211_send_pspoll(local
, sdata
);
1804 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1806 erp_value
= elems
.erp_info
[0];
1810 changed
|= ieee80211_handle_bss_capability(sdata
,
1811 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1812 erp_valid
, erp_value
);
1815 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1816 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
)) {
1817 struct sta_info
*sta
;
1818 struct ieee80211_supported_band
*sband
;
1819 u16 ap_ht_cap_flags
;
1823 sta
= sta_info_get(local
, ifmgd
->bssid
);
1829 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1831 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1832 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1834 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1838 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1842 if (elems
.country_elem
) {
1843 /* Note we are only reviewing this on beacons
1844 * for the BSSID we are associated to */
1845 regulatory_hint_11d(local
->hw
.wiphy
,
1846 elems
.country_elem
, elems
.country_elem_len
);
1848 /* TODO: IBSS also needs this */
1849 if (elems
.pwr_constr_elem
)
1850 ieee80211_handle_pwr_constr(sdata
,
1851 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1852 elems
.pwr_constr_elem
,
1853 elems
.pwr_constr_elem_len
);
1856 ieee80211_bss_info_change_notify(sdata
, changed
);
1859 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
1860 struct sk_buff
*skb
,
1861 struct ieee80211_rx_status
*rx_status
)
1863 struct ieee80211_local
*local
= sdata
->local
;
1864 struct ieee80211_mgmt
*mgmt
;
1868 return RX_DROP_MONITOR
;
1870 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1871 fc
= le16_to_cpu(mgmt
->frame_control
);
1873 switch (fc
& IEEE80211_FCTL_STYPE
) {
1874 case IEEE80211_STYPE_PROBE_REQ
:
1875 case IEEE80211_STYPE_PROBE_RESP
:
1876 case IEEE80211_STYPE_BEACON
:
1877 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
1878 case IEEE80211_STYPE_AUTH
:
1879 case IEEE80211_STYPE_ASSOC_RESP
:
1880 case IEEE80211_STYPE_REASSOC_RESP
:
1881 case IEEE80211_STYPE_DEAUTH
:
1882 case IEEE80211_STYPE_DISASSOC
:
1883 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
1884 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
1888 return RX_DROP_MONITOR
;
1891 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1892 struct sk_buff
*skb
)
1894 struct ieee80211_rx_status
*rx_status
;
1895 struct ieee80211_mgmt
*mgmt
;
1898 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1899 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1900 fc
= le16_to_cpu(mgmt
->frame_control
);
1902 switch (fc
& IEEE80211_FCTL_STYPE
) {
1903 case IEEE80211_STYPE_PROBE_RESP
:
1904 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
,
1907 case IEEE80211_STYPE_BEACON
:
1908 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1911 case IEEE80211_STYPE_AUTH
:
1912 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
1914 case IEEE80211_STYPE_ASSOC_RESP
:
1915 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 0);
1917 case IEEE80211_STYPE_REASSOC_RESP
:
1918 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 1);
1920 case IEEE80211_STYPE_DEAUTH
:
1921 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1923 case IEEE80211_STYPE_DISASSOC
:
1924 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1931 static void ieee80211_sta_timer(unsigned long data
)
1933 struct ieee80211_sub_if_data
*sdata
=
1934 (struct ieee80211_sub_if_data
*) data
;
1935 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1936 struct ieee80211_local
*local
= sdata
->local
;
1938 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
1939 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1942 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
)
1944 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1945 struct ieee80211_local
*local
= sdata
->local
;
1947 if (local
->ops
->reset_tsf
) {
1948 /* Reset own TSF to allow time synchronization work. */
1949 local
->ops
->reset_tsf(local_to_hw(local
));
1952 ifmgd
->wmm_last_param_set
= -1; /* allow any WMM update */
1955 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1956 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
1957 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1958 ifmgd
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
1959 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1960 ifmgd
->auth_alg
= WLAN_AUTH_LEAP
;
1961 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_FT
)
1962 ifmgd
->auth_alg
= WLAN_AUTH_FT
;
1964 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
1965 ifmgd
->auth_transaction
= -1;
1966 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
1967 ifmgd
->assoc_scan_tries
= 0;
1968 ifmgd
->direct_probe_tries
= 0;
1969 ifmgd
->auth_tries
= 0;
1970 ifmgd
->assoc_tries
= 0;
1971 netif_tx_stop_all_queues(sdata
->dev
);
1972 netif_carrier_off(sdata
->dev
);
1975 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
)
1977 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1978 struct ieee80211_local
*local
= sdata
->local
;
1979 struct ieee80211_bss
*bss
;
1980 u8
*bssid
= ifmgd
->bssid
, *ssid
= ifmgd
->ssid
;
1981 u8 ssid_len
= ifmgd
->ssid_len
;
1982 u16 capa_mask
= WLAN_CAPABILITY_ESS
;
1983 u16 capa_val
= WLAN_CAPABILITY_ESS
;
1984 struct ieee80211_channel
*chan
= local
->oper_channel
;
1986 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1987 ifmgd
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
1988 IEEE80211_STA_AUTO_BSSID_SEL
|
1989 IEEE80211_STA_AUTO_CHANNEL_SEL
)) {
1990 capa_mask
|= WLAN_CAPABILITY_PRIVACY
;
1991 if (sdata
->default_key
)
1992 capa_val
|= WLAN_CAPABILITY_PRIVACY
;
1995 if (ifmgd
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
1998 if (ifmgd
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
2001 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) {
2006 bss
= (void *)cfg80211_get_bss(local
->hw
.wiphy
, chan
,
2007 bssid
, ssid
, ssid_len
,
2008 capa_mask
, capa_val
);
2011 ieee80211_set_freq(sdata
, bss
->cbss
.channel
->center_freq
);
2012 if (!(ifmgd
->flags
& IEEE80211_STA_SSID_SET
))
2013 ieee80211_sta_set_ssid(sdata
, bss
->ssid
,
2015 ieee80211_sta_set_bssid(sdata
, bss
->cbss
.bssid
);
2016 ieee80211_sta_def_wmm_params(sdata
, bss
->supp_rates_len
,
2018 if (sdata
->u
.mgd
.mfp
== IEEE80211_MFP_REQUIRED
)
2019 sdata
->u
.mgd
.flags
|= IEEE80211_STA_MFP_ENABLED
;
2021 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2023 /* Send out direct probe if no probe resp was received or
2024 * the one we have is outdated
2026 if (!bss
->last_probe_resp
||
2027 time_after(jiffies
, bss
->last_probe_resp
2028 + IEEE80211_SCAN_RESULT_EXPIRE
))
2029 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
2031 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2033 ieee80211_rx_bss_put(local
, bss
);
2034 ieee80211_sta_reset_auth(sdata
);
2037 if (ifmgd
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
2038 ifmgd
->assoc_scan_tries
++;
2039 /* XXX maybe racy? */
2040 if (local
->scan_req
)
2042 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
2043 ifmgd
->ssid
, IEEE80211_MAX_SSID_LEN
);
2044 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
2045 local
->int_scan_req
.ssids
[0].ssid_len
= 0;
2047 local
->int_scan_req
.ssids
[0].ssid_len
= ifmgd
->ssid_len
;
2049 if (ieee80211_start_scan(sdata
, &local
->int_scan_req
))
2050 ieee80211_scan_failed(local
);
2052 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2053 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
2055 ifmgd
->assoc_scan_tries
= 0;
2056 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
2063 static void ieee80211_sta_work(struct work_struct
*work
)
2065 struct ieee80211_sub_if_data
*sdata
=
2066 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
2067 struct ieee80211_local
*local
= sdata
->local
;
2068 struct ieee80211_if_managed
*ifmgd
;
2069 struct sk_buff
*skb
;
2071 if (!netif_running(sdata
->dev
))
2074 if (local
->sw_scanning
|| local
->hw_scanning
)
2077 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2079 ifmgd
= &sdata
->u
.mgd
;
2081 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
2082 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2084 if (ifmgd
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
2085 ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
2086 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
2087 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifmgd
->request
)) {
2089 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
2090 * (which queued ieee80211_sta_work) did not return an error. Thus, call
2091 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
2092 * notify the scan requester.
2094 if (ieee80211_start_scan(sdata
, local
->scan_req
))
2095 ieee80211_scan_failed(local
);
2099 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
)) {
2100 if (ieee80211_sta_config_auth(sdata
))
2102 clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2103 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
))
2106 switch (ifmgd
->state
) {
2107 case IEEE80211_STA_MLME_DISABLED
:
2109 case IEEE80211_STA_MLME_DIRECT_PROBE
:
2110 ieee80211_direct_probe(sdata
);
2112 case IEEE80211_STA_MLME_AUTHENTICATE
:
2113 ieee80211_authenticate(sdata
);
2115 case IEEE80211_STA_MLME_ASSOCIATE
:
2116 ieee80211_associate(sdata
);
2118 case IEEE80211_STA_MLME_ASSOCIATED
:
2119 ieee80211_associated(sdata
);
2126 if (ieee80211_privacy_mismatch(sdata
)) {
2127 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2128 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
2130 ieee80211_set_disassoc(sdata
, false, true,
2131 WLAN_REASON_UNSPECIFIED
);
2135 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2137 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2139 * Need to update last_beacon to avoid beacon loss
2142 sdata
->u
.mgd
.last_beacon
= jiffies
;
2145 queue_work(sdata
->local
->hw
.workqueue
,
2146 &sdata
->u
.mgd
.work
);
2150 /* interface setup */
2151 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2153 struct ieee80211_if_managed
*ifmgd
;
2155 ifmgd
= &sdata
->u
.mgd
;
2156 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
2157 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2158 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
2159 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2160 (unsigned long) sdata
);
2161 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2162 (unsigned long) sdata
);
2163 skb_queue_head_init(&ifmgd
->skb_queue
);
2165 ifmgd
->capab
= WLAN_CAPABILITY_ESS
;
2166 ifmgd
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
2167 IEEE80211_AUTH_ALG_SHARED_KEY
;
2168 ifmgd
->flags
|= IEEE80211_STA_CREATE_IBSS
|
2169 IEEE80211_STA_AUTO_BSSID_SEL
|
2170 IEEE80211_STA_AUTO_CHANNEL_SEL
;
2171 if (sdata
->local
->hw
.queues
>= 4)
2172 ifmgd
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2175 /* configuration hooks */
2176 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
)
2178 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2179 struct ieee80211_local
*local
= sdata
->local
;
2181 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2184 if ((ifmgd
->flags
& (IEEE80211_STA_BSSID_SET
|
2185 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
2186 (ifmgd
->flags
& (IEEE80211_STA_SSID_SET
|
2187 IEEE80211_STA_AUTO_SSID_SEL
))) {
2189 if (ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
2190 ieee80211_set_disassoc(sdata
, true, true,
2191 WLAN_REASON_DEAUTH_LEAVING
);
2193 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) ||
2194 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
2195 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
2196 else if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
)
2197 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2198 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
2202 int ieee80211_sta_commit(struct ieee80211_sub_if_data
*sdata
)
2204 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2206 if (ifmgd
->ssid_len
)
2207 ifmgd
->flags
|= IEEE80211_STA_SSID_SET
;
2209 ifmgd
->flags
&= ~IEEE80211_STA_SSID_SET
;
2214 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
2216 struct ieee80211_if_managed
*ifmgd
;
2218 if (len
> IEEE80211_MAX_SSID_LEN
)
2221 ifmgd
= &sdata
->u
.mgd
;
2223 if (ifmgd
->ssid_len
!= len
|| memcmp(ifmgd
->ssid
, ssid
, len
) != 0) {
2225 * Do not use reassociation if SSID is changed (different ESS).
2227 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
2228 memset(ifmgd
->ssid
, 0, sizeof(ifmgd
->ssid
));
2229 memcpy(ifmgd
->ssid
, ssid
, len
);
2230 ifmgd
->ssid_len
= len
;
2233 return ieee80211_sta_commit(sdata
);
2236 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
2238 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2239 memcpy(ssid
, ifmgd
->ssid
, ifmgd
->ssid_len
);
2240 *len
= ifmgd
->ssid_len
;
2244 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2246 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2248 if (is_valid_ether_addr(bssid
)) {
2249 memcpy(ifmgd
->bssid
, bssid
, ETH_ALEN
);
2250 ifmgd
->flags
|= IEEE80211_STA_BSSID_SET
;
2252 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
2253 ifmgd
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2256 if (netif_running(sdata
->dev
)) {
2257 if (ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
)) {
2258 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2259 "the low-level driver\n", sdata
->dev
->name
);
2263 return ieee80211_sta_commit(sdata
);
2266 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
,
2267 const char *ie
, size_t len
)
2269 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2271 kfree(ifmgd
->extra_ie
);
2273 ifmgd
->extra_ie
= NULL
;
2274 ifmgd
->extra_ie_len
= 0;
2277 ifmgd
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2278 if (!ifmgd
->extra_ie
) {
2279 ifmgd
->extra_ie_len
= 0;
2282 memcpy(ifmgd
->extra_ie
, ie
, len
);
2283 ifmgd
->extra_ie_len
= len
;
2287 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2289 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2290 sdata
->dev
->name
, reason
);
2292 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2295 ieee80211_set_disassoc(sdata
, true, true, reason
);
2299 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2301 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2303 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2304 sdata
->dev
->name
, reason
);
2306 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2309 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
))
2312 ieee80211_set_disassoc(sdata
, false, true, reason
);
2316 /* scan finished notification */
2317 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2319 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2321 /* Restart STA timers */
2323 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2324 ieee80211_restart_sta_timer(sdata
);