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"
29 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
30 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
31 #define IEEE80211_AUTH_MAX_TRIES 3
32 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
33 #define IEEE80211_ASSOC_MAX_TRIES 3
34 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
35 #define IEEE80211_PROBE_IDLE_TIME (60 * HZ)
36 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39 static int ecw2cw(int ecw
)
41 return (1 << ecw
) - 1;
44 static u8
*ieee80211_bss_get_ie(struct ieee80211_bss
*bss
, u8 ie
)
48 pos
= bss
->cbss
.information_elements
;
51 end
= pos
+ bss
->cbss
.len_information_elements
;
53 while (pos
+ 1 < end
) {
54 if (pos
+ 2 + pos
[1] > end
)
64 static int ieee80211_compatible_rates(struct ieee80211_bss
*bss
,
65 struct ieee80211_supported_band
*sband
,
71 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
72 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
74 for (j
= 0; j
< sband
->n_bitrates
; j
++)
75 if (sband
->bitrates
[j
].bitrate
== rate
) {
86 * ieee80211_enable_ht should be called only after the operating band
87 * has been determined as ht configuration depends on the hw's
88 * HT abilities for a specific band.
90 static u32
ieee80211_enable_ht(struct ieee80211_sub_if_data
*sdata
,
91 struct ieee80211_ht_info
*hti
,
94 struct ieee80211_local
*local
= sdata
->local
;
95 struct ieee80211_supported_band
*sband
;
96 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
97 struct ieee80211_bss_ht_conf ht
;
100 bool enable_ht
= true, ht_changed
;
101 enum nl80211_channel_type channel_type
= NL80211_CHAN_NO_HT
;
103 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
105 memset(&ht
, 0, sizeof(ht
));
107 /* HT is not supported */
108 if (!sband
->ht_cap
.ht_supported
)
111 /* check that channel matches the right operating channel */
112 if (local
->hw
.conf
.channel
->center_freq
!=
113 ieee80211_channel_to_frequency(hti
->control_chan
))
117 channel_type
= NL80211_CHAN_HT20
;
119 if (!(ap_ht_cap_flags
& IEEE80211_HT_CAP_40MHZ_INTOLERANT
) &&
120 (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SUP_WIDTH_20_40
) &&
121 (hti
->ht_param
& IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
)) {
122 switch(hti
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
123 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
124 channel_type
= NL80211_CHAN_HT40PLUS
;
126 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
127 channel_type
= NL80211_CHAN_HT40MINUS
;
133 ht_changed
= conf_is_ht(&local
->hw
.conf
) != enable_ht
||
134 channel_type
!= local
->hw
.conf
.channel_type
;
136 local
->oper_channel_type
= channel_type
;
139 /* channel_type change automatically detected */
140 ieee80211_hw_config(local
, 0);
144 sta
= sta_info_get(local
, ifmgd
->bssid
);
146 rate_control_rate_update(local
, sband
, sta
,
147 IEEE80211_RC_HT_CHANGED
);
157 ht
.operation_mode
= le16_to_cpu(hti
->operation_mode
);
159 /* if bss configuration changed store the new one */
160 if (memcmp(&sdata
->vif
.bss_conf
.ht
, &ht
, sizeof(ht
))) {
161 changed
|= BSS_CHANGED_HT
;
162 sdata
->vif
.bss_conf
.ht
= ht
;
168 /* frame sending functions */
170 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
172 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
173 struct ieee80211_local
*local
= sdata
->local
;
175 struct ieee80211_mgmt
*mgmt
;
176 u8
*pos
, *ies
, *ht_ie
;
177 int i
, len
, count
, rates_len
, supp_rates_len
;
179 struct ieee80211_bss
*bss
;
181 struct ieee80211_supported_band
*sband
;
184 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
185 sizeof(*mgmt
) + 200 + ifmgd
->extra_ie_len
+
188 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
189 "frame\n", sdata
->dev
->name
);
192 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
194 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
196 capab
= ifmgd
->capab
;
198 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
199 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
200 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
201 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
202 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
205 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
206 local
->hw
.conf
.channel
->center_freq
,
207 ifmgd
->ssid
, ifmgd
->ssid_len
);
209 if (bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
)
210 capab
|= WLAN_CAPABILITY_PRIVACY
;
214 /* get all rates supported by the device and the AP as
215 * some APs don't like getting a superset of their rates
216 * in the association request (e.g. D-Link DAP 1353 in
218 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
220 if ((bss
->cbss
.capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
221 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
222 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
224 ieee80211_rx_bss_put(local
, bss
);
227 rates_len
= sband
->n_bitrates
;
230 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
232 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
233 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
234 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
236 if (ifmgd
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
238 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
239 IEEE80211_STYPE_REASSOC_REQ
);
240 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
241 mgmt
->u
.reassoc_req
.listen_interval
=
242 cpu_to_le16(local
->hw
.conf
.listen_interval
);
243 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifmgd
->prev_bssid
,
247 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
248 IEEE80211_STYPE_ASSOC_REQ
);
249 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
250 mgmt
->u
.assoc_req
.listen_interval
=
251 cpu_to_le16(local
->hw
.conf
.listen_interval
);
255 ies
= pos
= skb_put(skb
, 2 + ifmgd
->ssid_len
);
256 *pos
++ = WLAN_EID_SSID
;
257 *pos
++ = ifmgd
->ssid_len
;
258 memcpy(pos
, ifmgd
->ssid
, ifmgd
->ssid_len
);
260 /* add all rates which were marked to be used above */
261 supp_rates_len
= rates_len
;
262 if (supp_rates_len
> 8)
265 len
= sband
->n_bitrates
;
266 pos
= skb_put(skb
, supp_rates_len
+ 2);
267 *pos
++ = WLAN_EID_SUPP_RATES
;
268 *pos
++ = supp_rates_len
;
271 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
272 if (BIT(i
) & rates
) {
273 int rate
= sband
->bitrates
[i
].bitrate
;
274 *pos
++ = (u8
) (rate
/ 5);
280 if (rates_len
> count
) {
281 pos
= skb_put(skb
, rates_len
- count
+ 2);
282 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
283 *pos
++ = rates_len
- count
;
285 for (i
++; i
< sband
->n_bitrates
; i
++) {
286 if (BIT(i
) & rates
) {
287 int rate
= sband
->bitrates
[i
].bitrate
;
288 *pos
++ = (u8
) (rate
/ 5);
293 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
294 /* 1. power capabilities */
295 pos
= skb_put(skb
, 4);
296 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
298 *pos
++ = 0; /* min tx power */
299 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
301 /* 2. supported channels */
302 /* TODO: get this in reg domain format */
303 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
304 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
305 *pos
++ = 2 * sband
->n_channels
;
306 for (i
= 0; i
< sband
->n_channels
; i
++) {
307 *pos
++ = ieee80211_frequency_to_channel(
308 sband
->channels
[i
].center_freq
);
309 *pos
++ = 1; /* one channel in the subband*/
313 if (ifmgd
->extra_ie
) {
314 pos
= skb_put(skb
, ifmgd
->extra_ie_len
);
315 memcpy(pos
, ifmgd
->extra_ie
, ifmgd
->extra_ie_len
);
318 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
319 pos
= skb_put(skb
, 9);
320 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
321 *pos
++ = 7; /* len */
322 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
325 *pos
++ = 2; /* WME */
326 *pos
++ = 0; /* WME info */
327 *pos
++ = 1; /* WME ver */
331 /* wmm support is a must to HT */
333 * IEEE802.11n does not allow TKIP/WEP as pairwise
334 * ciphers in HT mode. We still associate in non-ht
335 * mode (11a/b/g) if any one of these ciphers is
336 * configured as pairwise.
338 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
339 sband
->ht_cap
.ht_supported
&&
340 (ht_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_INFORMATION
)) &&
341 ht_ie
[1] >= sizeof(struct ieee80211_ht_info
) &&
342 (!(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))) {
343 struct ieee80211_ht_info
*ht_info
=
344 (struct ieee80211_ht_info
*)(ht_ie
+ 2);
345 u16 cap
= sband
->ht_cap
.cap
;
347 u32 flags
= local
->hw
.conf
.channel
->flags
;
349 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
350 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
351 if (flags
& IEEE80211_CHAN_NO_FAT_ABOVE
) {
352 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
353 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
356 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
357 if (flags
& IEEE80211_CHAN_NO_FAT_BELOW
) {
358 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
359 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
364 tmp
= cpu_to_le16(cap
);
365 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
366 *pos
++ = WLAN_EID_HT_CAPABILITY
;
367 *pos
++ = sizeof(struct ieee80211_ht_cap
);
368 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
369 memcpy(pos
, &tmp
, sizeof(u16
));
371 /* TODO: needs a define here for << 2 */
372 *pos
++ = sband
->ht_cap
.ampdu_factor
|
373 (sband
->ht_cap
.ampdu_density
<< 2);
374 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
377 kfree(ifmgd
->assocreq_ies
);
378 ifmgd
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
379 ifmgd
->assocreq_ies
= kmalloc(ifmgd
->assocreq_ies_len
, GFP_KERNEL
);
380 if (ifmgd
->assocreq_ies
)
381 memcpy(ifmgd
->assocreq_ies
, ies
, ifmgd
->assocreq_ies_len
);
383 ieee80211_tx_skb(sdata
, skb
, 0);
387 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
388 u16 stype
, u16 reason
)
390 struct ieee80211_local
*local
= sdata
->local
;
391 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
393 struct ieee80211_mgmt
*mgmt
;
395 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
397 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
398 "deauth/disassoc frame\n", sdata
->dev
->name
);
401 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
403 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
405 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
406 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
407 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
408 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
410 /* u.deauth.reason_code == u.disassoc.reason_code */
411 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
413 if (stype
== IEEE80211_STYPE_DEAUTH
)
414 cfg80211_send_deauth(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
416 cfg80211_send_disassoc(sdata
->dev
, (u8
*) mgmt
, skb
->len
);
417 ieee80211_tx_skb(sdata
, skb
, ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
);
420 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
421 struct ieee80211_sub_if_data
*sdata
)
423 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
424 struct ieee80211_pspoll
*pspoll
;
428 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
430 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
431 "pspoll frame\n", sdata
->dev
->name
);
434 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
436 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
437 memset(pspoll
, 0, sizeof(*pspoll
));
438 fc
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
| IEEE80211_FCTL_PM
;
439 pspoll
->frame_control
= cpu_to_le16(fc
);
440 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
442 /* aid in PS-Poll has its two MSBs each set to 1 */
443 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
445 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
446 memcpy(pspoll
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
448 ieee80211_tx_skb(sdata
, skb
, 0);
451 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
452 struct ieee80211_sub_if_data
*sdata
,
456 struct ieee80211_hdr
*nullfunc
;
459 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
462 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
464 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
465 "frame\n", sdata
->dev
->name
);
468 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
470 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
471 memset(nullfunc
, 0, 24);
472 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
473 IEEE80211_FCTL_TODS
);
475 fc
|= cpu_to_le16(IEEE80211_FCTL_PM
);
476 nullfunc
->frame_control
= fc
;
477 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
478 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
479 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
481 ieee80211_tx_skb(sdata
, skb
, 0);
485 static void ieee80211_enable_ps(struct ieee80211_local
*local
,
486 struct ieee80211_sub_if_data
*sdata
)
488 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
491 * If we are scanning right now then the parameters will
492 * take effect when scan finishes.
494 if (local
->hw_scanning
|| local
->sw_scanning
)
497 if (conf
->dynamic_ps_timeout
> 0 &&
498 !(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
)) {
499 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
500 msecs_to_jiffies(conf
->dynamic_ps_timeout
));
502 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
503 ieee80211_send_nullfunc(local
, sdata
, 1);
504 conf
->flags
|= IEEE80211_CONF_PS
;
505 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
509 static void ieee80211_change_ps(struct ieee80211_local
*local
)
511 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
513 if (local
->ps_sdata
) {
514 if (!(local
->ps_sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
))
517 ieee80211_enable_ps(local
, local
->ps_sdata
);
518 } else if (conf
->flags
& IEEE80211_CONF_PS
) {
519 conf
->flags
&= ~IEEE80211_CONF_PS
;
520 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
521 del_timer_sync(&local
->dynamic_ps_timer
);
522 cancel_work_sync(&local
->dynamic_ps_enable_work
);
526 /* need to hold RTNL or interface lock */
527 void ieee80211_recalc_ps(struct ieee80211_local
*local
, s32 latency
)
529 struct ieee80211_sub_if_data
*sdata
, *found
= NULL
;
532 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_PS
)) {
533 local
->ps_sdata
= NULL
;
537 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
538 if (!netif_running(sdata
->dev
))
540 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
546 if (count
== 1 && found
->u
.mgd
.powersave
) {
550 latency
= pm_qos_requirement(PM_QOS_NETWORK_LATENCY
);
552 beaconint_us
= ieee80211_tu_to_usec(
553 found
->vif
.bss_conf
.beacon_int
);
555 if (beaconint_us
> latency
) {
556 local
->ps_sdata
= NULL
;
558 u8 dtimper
= found
->vif
.bss_conf
.dtim_period
;
562 maxslp
= min_t(int, dtimper
,
563 latency
/ beaconint_us
);
565 local
->hw
.conf
.max_sleep_period
= maxslp
;
566 local
->ps_sdata
= found
;
569 local
->ps_sdata
= NULL
;
572 ieee80211_change_ps(local
);
575 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
577 struct ieee80211_local
*local
=
578 container_of(work
, struct ieee80211_local
,
579 dynamic_ps_disable_work
);
581 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
582 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
583 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
586 ieee80211_wake_queues_by_reason(&local
->hw
,
587 IEEE80211_QUEUE_STOP_REASON_PS
);
590 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
592 struct ieee80211_local
*local
=
593 container_of(work
, struct ieee80211_local
,
594 dynamic_ps_enable_work
);
595 struct ieee80211_sub_if_data
*sdata
= local
->ps_sdata
;
597 /* can only happen when PS was just disabled anyway */
601 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
604 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
605 ieee80211_send_nullfunc(local
, sdata
, 1);
607 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
608 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
611 void ieee80211_dynamic_ps_timer(unsigned long data
)
613 struct ieee80211_local
*local
= (void *) data
;
615 queue_work(local
->hw
.workqueue
, &local
->dynamic_ps_enable_work
);
619 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
620 struct ieee80211_if_managed
*ifmgd
,
621 u8
*wmm_param
, size_t wmm_param_len
)
623 struct ieee80211_tx_queue_params params
;
628 if (!(ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
))
634 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
636 count
= wmm_param
[6] & 0x0f;
637 if (count
== ifmgd
->wmm_last_param_set
)
639 ifmgd
->wmm_last_param_set
= count
;
642 left
= wmm_param_len
- 8;
644 memset(¶ms
, 0, sizeof(params
));
647 for (; left
>= 4; left
-= 4, pos
+= 4) {
648 int aci
= (pos
[0] >> 5) & 0x03;
649 int acm
= (pos
[0] >> 4) & 0x01;
656 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
661 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
666 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
672 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
676 params
.aifs
= pos
[0] & 0x0f;
677 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
678 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
679 params
.txop
= get_unaligned_le16(pos
+ 2);
680 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
681 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
682 "cWmin=%d cWmax=%d txop=%d\n",
683 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
684 params
.cw_max
, params
.txop
);
686 if (local
->ops
->conf_tx
&&
687 local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
688 printk(KERN_DEBUG
"%s: failed to set TX queue "
689 "parameters for queue %d\n", local
->mdev
->name
, queue
);
694 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
695 u16 capab
, bool erp_valid
, u8 erp
)
697 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
698 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
699 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
703 bool use_short_preamble
;
707 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
708 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
710 use_protection
= false;
711 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
714 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
716 if (use_protection
!= bss_conf
->use_cts_prot
) {
717 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
718 if (net_ratelimit()) {
719 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID=%pM)\n",
721 use_protection
? "enabled" : "disabled",
725 bss_conf
->use_cts_prot
= use_protection
;
726 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
729 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
730 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
731 if (net_ratelimit()) {
732 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
735 use_short_preamble
? "short" : "long",
739 bss_conf
->use_short_preamble
= use_short_preamble
;
740 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
743 if (use_short_slot
!= bss_conf
->use_short_slot
) {
744 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
745 if (net_ratelimit()) {
746 printk(KERN_DEBUG
"%s: switched to %s slot time"
749 use_short_slot
? "short" : "long",
753 bss_conf
->use_short_slot
= use_short_slot
;
754 changed
|= BSS_CHANGED_ERP_SLOT
;
760 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
)
762 union iwreq_data wrqu
;
764 memset(&wrqu
, 0, sizeof(wrqu
));
765 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
)
766 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
767 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
768 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
771 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
)
773 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
777 union iwreq_data wrqu
;
779 if (!ifmgd
->assocreq_ies
&& !ifmgd
->assocresp_ies
)
782 buf
= kmalloc(50 + 2 * (ifmgd
->assocreq_ies_len
+
783 ifmgd
->assocresp_ies_len
), GFP_KERNEL
);
787 len
= sprintf(buf
, "ASSOCINFO(");
788 if (ifmgd
->assocreq_ies
) {
789 len
+= sprintf(buf
+ len
, "ReqIEs=");
790 for (i
= 0; i
< ifmgd
->assocreq_ies_len
; i
++) {
791 len
+= sprintf(buf
+ len
, "%02x",
792 ifmgd
->assocreq_ies
[i
]);
795 if (ifmgd
->assocresp_ies
) {
796 if (ifmgd
->assocreq_ies
)
797 len
+= sprintf(buf
+ len
, " ");
798 len
+= sprintf(buf
+ len
, "RespIEs=");
799 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
800 len
+= sprintf(buf
+ len
, "%02x",
801 ifmgd
->assocresp_ies
[i
]);
804 len
+= sprintf(buf
+ len
, ")");
806 if (len
> IW_CUSTOM_MAX
) {
807 len
= sprintf(buf
, "ASSOCRESPIE=");
808 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
809 len
+= sprintf(buf
+ len
, "%02x",
810 ifmgd
->assocresp_ies
[i
]);
814 if (len
<= IW_CUSTOM_MAX
) {
815 memset(&wrqu
, 0, sizeof(wrqu
));
816 wrqu
.data
.length
= len
;
817 wireless_send_event(sdata
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
824 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
825 u32 bss_info_changed
)
827 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
828 struct ieee80211_local
*local
= sdata
->local
;
829 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
831 struct ieee80211_bss
*bss
;
833 bss_info_changed
|= BSS_CHANGED_ASSOC
;
834 ifmgd
->flags
|= IEEE80211_STA_ASSOCIATED
;
836 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
837 conf
->channel
->center_freq
,
838 ifmgd
->ssid
, ifmgd
->ssid_len
);
840 /* set timing information */
841 sdata
->vif
.bss_conf
.beacon_int
= bss
->cbss
.beacon_interval
;
842 sdata
->vif
.bss_conf
.timestamp
= bss
->cbss
.tsf
;
843 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
845 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
846 bss
->cbss
.capability
, bss
->has_erp_value
, bss
->erp_value
);
848 cfg80211_hold_bss(&bss
->cbss
);
850 ieee80211_rx_bss_put(local
, bss
);
853 ifmgd
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
854 memcpy(ifmgd
->prev_bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
855 ieee80211_sta_send_associnfo(sdata
);
857 ifmgd
->last_probe
= jiffies
;
858 ieee80211_led_assoc(local
, 1);
860 sdata
->vif
.bss_conf
.assoc
= 1;
862 * For now just always ask the driver to update the basic rateset
863 * when we have associated, we aren't checking whether it actually
866 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
867 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
869 /* will be same as sdata */
870 if (local
->ps_sdata
) {
871 mutex_lock(&local
->iflist_mtx
);
872 ieee80211_recalc_ps(local
, -1);
873 mutex_unlock(&local
->iflist_mtx
);
876 netif_tx_start_all_queues(sdata
->dev
);
877 netif_carrier_on(sdata
->dev
);
879 ieee80211_sta_send_apinfo(sdata
);
882 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
)
884 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
885 struct ieee80211_local
*local
= sdata
->local
;
887 ifmgd
->direct_probe_tries
++;
888 if (ifmgd
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
889 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
890 sdata
->dev
->name
, ifmgd
->bssid
);
891 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
892 ieee80211_sta_send_apinfo(sdata
);
895 * Most likely AP is not in the range so remove the
896 * bss information associated to the AP
898 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
899 sdata
->local
->hw
.conf
.channel
->center_freq
,
900 ifmgd
->ssid
, ifmgd
->ssid_len
);
903 * We might have a pending scan which had no chance to run yet
904 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
905 * Hence, queue the STAs work again
907 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
911 printk(KERN_DEBUG
"%s: direct probe to AP %pM try %d\n",
912 sdata
->dev
->name
, ifmgd
->bssid
,
913 ifmgd
->direct_probe_tries
);
915 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
917 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifmgd
->request
);
919 /* Direct probe is sent to broadcast address as some APs
920 * will not answer to direct packet in unassociated state.
922 ieee80211_send_probe_req(sdata
, NULL
,
923 ifmgd
->ssid
, ifmgd
->ssid_len
, NULL
, 0);
925 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
929 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
)
931 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
932 struct ieee80211_local
*local
= sdata
->local
;
937 if (ifmgd
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
938 printk(KERN_DEBUG
"%s: authentication with AP %pM"
940 sdata
->dev
->name
, ifmgd
->bssid
);
941 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
942 cfg80211_send_auth_timeout(sdata
->dev
, ifmgd
->bssid
);
943 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
944 sdata
->local
->hw
.conf
.channel
->center_freq
,
945 ifmgd
->ssid
, ifmgd
->ssid_len
);
948 * We might have a pending scan which had no chance to run yet
949 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
950 * Hence, queue the STAs work again
952 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
956 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
957 printk(KERN_DEBUG
"%s: authenticate with AP %pM\n",
958 sdata
->dev
->name
, ifmgd
->bssid
);
960 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
961 ies
= ifmgd
->sme_auth_ie
;
962 ies_len
= ifmgd
->sme_auth_ie_len
;
967 ieee80211_send_auth(sdata
, 1, ifmgd
->auth_alg
, ies
, ies_len
,
969 ifmgd
->auth_transaction
= 2;
971 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
975 * The disassoc 'reason' argument can be either our own reason
976 * if self disconnected or a reason code from the AP.
978 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
979 bool deauth
, bool self_disconnected
,
982 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
983 struct ieee80211_local
*local
= sdata
->local
;
984 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
985 struct ieee80211_bss
*bss
;
986 struct sta_info
*sta
;
987 u32 changed
= 0, config_changed
= 0;
991 sta
= sta_info_get(local
, ifmgd
->bssid
);
998 ifmgd
->direct_probe_tries
= 0;
999 ifmgd
->auth_tries
= 0;
1001 ifmgd
->assoc_scan_tries
= 0;
1002 ifmgd
->assoc_tries
= 0;
1004 netif_tx_stop_all_queues(sdata
->dev
);
1005 netif_carrier_off(sdata
->dev
);
1007 ieee80211_sta_tear_down_BA_sessions(sta
);
1009 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
1010 conf
->channel
->center_freq
,
1011 ifmgd
->ssid
, ifmgd
->ssid_len
);
1014 cfg80211_unhold_bss(&bss
->cbss
);
1015 ieee80211_rx_bss_put(local
, bss
);
1018 if (self_disconnected
) {
1020 ieee80211_send_deauth_disassoc(sdata
,
1021 IEEE80211_STYPE_DEAUTH
, reason
);
1023 ieee80211_send_deauth_disassoc(sdata
,
1024 IEEE80211_STYPE_DISASSOC
, reason
);
1027 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
1028 changed
|= ieee80211_reset_erp_info(sdata
);
1030 ieee80211_led_assoc(local
, 0);
1031 changed
|= BSS_CHANGED_ASSOC
;
1032 sdata
->vif
.bss_conf
.assoc
= false;
1034 ieee80211_sta_send_apinfo(sdata
);
1036 if (self_disconnected
|| reason
== WLAN_REASON_DISASSOC_STA_HAS_LEFT
) {
1037 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1038 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1039 sdata
->local
->hw
.conf
.channel
->center_freq
,
1040 ifmgd
->ssid
, ifmgd
->ssid_len
);
1045 /* channel(_type) changes are handled by ieee80211_hw_config */
1046 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
1048 local
->power_constr_level
= 0;
1050 del_timer_sync(&local
->dynamic_ps_timer
);
1051 cancel_work_sync(&local
->dynamic_ps_enable_work
);
1053 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1054 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1055 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
1058 ieee80211_hw_config(local
, config_changed
);
1059 ieee80211_bss_info_change_notify(sdata
, changed
);
1063 sta
= sta_info_get(local
, ifmgd
->bssid
);
1069 sta_info_unlink(&sta
);
1073 sta_info_destroy(sta
);
1076 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
1078 if (!sdata
|| !sdata
->default_key
||
1079 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
1084 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
)
1086 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1087 struct ieee80211_local
*local
= sdata
->local
;
1088 struct ieee80211_bss
*bss
;
1091 int privacy_invoked
;
1093 if (!ifmgd
|| (ifmgd
->flags
& IEEE80211_STA_EXT_SME
))
1096 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
1097 local
->hw
.conf
.channel
->center_freq
,
1098 ifmgd
->ssid
, ifmgd
->ssid_len
);
1102 bss_privacy
= !!(bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
);
1103 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
1104 privacy_invoked
= !!(ifmgd
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
1106 ieee80211_rx_bss_put(local
, bss
);
1108 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
1114 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
)
1116 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1117 struct ieee80211_local
*local
= sdata
->local
;
1119 ifmgd
->assoc_tries
++;
1120 if (ifmgd
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1121 printk(KERN_DEBUG
"%s: association with AP %pM"
1123 sdata
->dev
->name
, ifmgd
->bssid
);
1124 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1125 cfg80211_send_assoc_timeout(sdata
->dev
, ifmgd
->bssid
);
1126 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
1127 sdata
->local
->hw
.conf
.channel
->center_freq
,
1128 ifmgd
->ssid
, ifmgd
->ssid_len
);
1130 * We might have a pending scan which had no chance to run yet
1131 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
1132 * Hence, queue the STAs work again
1134 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1138 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1139 printk(KERN_DEBUG
"%s: associate with AP %pM\n",
1140 sdata
->dev
->name
, ifmgd
->bssid
);
1141 if (ieee80211_privacy_mismatch(sdata
)) {
1142 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
1143 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
1144 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1148 ieee80211_send_assoc(sdata
);
1150 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
1153 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
1154 struct ieee80211_hdr
*hdr
)
1157 * We can postpone the mgd.timer whenever receiving unicast frames
1158 * from AP because we know that the connection is working both ways
1159 * at that time. But multicast frames (and hence also beacons) must
1160 * be ignored here, because we need to trigger the timer during
1161 * data idle periods for sending the periodical probe request to
1164 if (!is_multicast_ether_addr(hdr
->addr1
))
1165 mod_timer(&sdata
->u
.mgd
.timer
,
1166 jiffies
+ IEEE80211_MONITORING_INTERVAL
);
1169 void ieee80211_beacon_loss_work(struct work_struct
*work
)
1171 struct ieee80211_sub_if_data
*sdata
=
1172 container_of(work
, struct ieee80211_sub_if_data
,
1173 u
.mgd
.beacon_loss_work
);
1174 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1176 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1177 if (net_ratelimit()) {
1178 printk(KERN_DEBUG
"%s: driver reports beacon loss from AP %pM "
1179 "- sending probe request\n", sdata
->dev
->name
,
1180 sdata
->u
.mgd
.bssid
);
1184 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1185 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1186 ifmgd
->ssid_len
, NULL
, 0);
1188 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_MONITORING_INTERVAL
);
1191 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
1193 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
1195 queue_work(sdata
->local
->hw
.workqueue
,
1196 &sdata
->u
.mgd
.beacon_loss_work
);
1198 EXPORT_SYMBOL(ieee80211_beacon_loss
);
1200 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
)
1202 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1203 struct ieee80211_local
*local
= sdata
->local
;
1204 struct sta_info
*sta
;
1205 bool disassoc
= false;
1207 /* TODO: start monitoring current AP signal quality and number of
1208 * missed beacons. Scan other channels every now and then and search
1209 * for better APs. */
1210 /* TODO: remove expired BSSes */
1212 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
1216 sta
= sta_info_get(local
, ifmgd
->bssid
);
1218 printk(KERN_DEBUG
"%s: No STA entry for own AP %pM\n",
1219 sdata
->dev
->name
, ifmgd
->bssid
);
1224 if ((ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
) &&
1225 time_after(jiffies
, sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
1226 printk(KERN_DEBUG
"%s: no probe response from AP %pM "
1227 "- disassociating\n",
1228 sdata
->dev
->name
, ifmgd
->bssid
);
1230 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1235 * Beacon filtering is only enabled with power save and then the
1236 * stack should not check for beacon loss.
1238 if (!((local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
) &&
1239 (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) &&
1241 ifmgd
->last_beacon
+ IEEE80211_MONITORING_INTERVAL
)) {
1242 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1243 if (net_ratelimit()) {
1244 printk(KERN_DEBUG
"%s: beacon loss from AP %pM "
1245 "- sending probe request\n",
1246 sdata
->dev
->name
, ifmgd
->bssid
);
1249 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1250 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1251 ifmgd
->ssid_len
, NULL
, 0);
1256 if (time_after(jiffies
, sta
->last_rx
+ IEEE80211_PROBE_IDLE_TIME
)) {
1257 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1258 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1259 ifmgd
->ssid_len
, NULL
, 0);
1266 ieee80211_set_disassoc(sdata
, true, true,
1267 WLAN_REASON_PREV_AUTH_NOT_VALID
);
1269 mod_timer(&ifmgd
->timer
, jiffies
+
1270 IEEE80211_MONITORING_INTERVAL
);
1274 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
)
1276 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1278 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1279 ifmgd
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1280 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1281 /* Wait for SME to request association */
1282 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1284 ieee80211_associate(sdata
);
1288 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1289 struct ieee80211_mgmt
*mgmt
,
1293 struct ieee802_11_elems elems
;
1295 pos
= mgmt
->u
.auth
.variable
;
1296 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1297 if (!elems
.challenge
)
1299 ieee80211_send_auth(sdata
, 3, sdata
->u
.mgd
.auth_alg
,
1300 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1301 sdata
->u
.mgd
.bssid
, 1);
1302 sdata
->u
.mgd
.auth_transaction
= 4;
1305 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1306 struct ieee80211_mgmt
*mgmt
,
1309 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1310 u16 auth_alg
, auth_transaction
, status_code
;
1312 if (ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
)
1318 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1321 if (memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1324 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1325 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1326 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1328 if (auth_alg
!= ifmgd
->auth_alg
||
1329 auth_transaction
!= ifmgd
->auth_transaction
)
1332 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1333 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1335 const int num_algs
= ARRAY_SIZE(algs
);
1337 algs
[0] = algs
[1] = algs
[2] = 0xff;
1338 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1339 algs
[0] = WLAN_AUTH_OPEN
;
1340 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1341 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1342 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1343 algs
[2] = WLAN_AUTH_LEAP
;
1344 if (ifmgd
->auth_alg
== WLAN_AUTH_OPEN
)
1346 else if (ifmgd
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1350 for (i
= 0; i
< num_algs
; i
++) {
1352 if (pos
>= num_algs
)
1354 if (algs
[pos
] == ifmgd
->auth_alg
||
1357 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1358 !ieee80211_sta_wep_configured(sdata
))
1360 ifmgd
->auth_alg
= algs
[pos
];
1367 switch (ifmgd
->auth_alg
) {
1368 case WLAN_AUTH_OPEN
:
1369 case WLAN_AUTH_LEAP
:
1371 ieee80211_auth_completed(sdata
);
1372 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1374 case WLAN_AUTH_SHARED_KEY
:
1375 if (ifmgd
->auth_transaction
== 4) {
1376 ieee80211_auth_completed(sdata
);
1377 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1379 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1385 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1386 struct ieee80211_mgmt
*mgmt
,
1389 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1395 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1398 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1400 if (ifmgd
->flags
& IEEE80211_STA_AUTHENTICATED
)
1401 printk(KERN_DEBUG
"%s: deauthenticated (Reason: %u)\n",
1402 sdata
->dev
->name
, reason_code
);
1404 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1405 (ifmgd
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1406 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1407 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)) {
1408 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1409 mod_timer(&ifmgd
->timer
, jiffies
+
1410 IEEE80211_RETRY_AUTH_INTERVAL
);
1413 ieee80211_set_disassoc(sdata
, true, false, 0);
1414 ifmgd
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1415 cfg80211_send_deauth(sdata
->dev
, (u8
*) mgmt
, len
);
1419 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1420 struct ieee80211_mgmt
*mgmt
,
1423 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1429 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1432 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1434 if (ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
)
1435 printk(KERN_DEBUG
"%s: disassociated (Reason: %u)\n",
1436 sdata
->dev
->name
, reason_code
);
1438 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1439 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1440 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1441 mod_timer(&ifmgd
->timer
, jiffies
+
1442 IEEE80211_RETRY_AUTH_INTERVAL
);
1445 ieee80211_set_disassoc(sdata
, false, false, reason_code
);
1446 cfg80211_send_disassoc(sdata
->dev
, (u8
*) mgmt
, len
);
1450 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1451 struct ieee80211_mgmt
*mgmt
,
1455 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1456 struct ieee80211_local
*local
= sdata
->local
;
1457 struct ieee80211_supported_band
*sband
;
1458 struct sta_info
*sta
;
1459 u32 rates
, basic_rates
;
1460 u16 capab_info
, status_code
, aid
;
1461 struct ieee802_11_elems elems
;
1462 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1466 bool have_higher_than_11mbit
= false, newsta
= false;
1467 u16 ap_ht_cap_flags
;
1469 /* AssocResp and ReassocResp have identical structure, so process both
1470 * of them in this function. */
1472 if (ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1478 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1481 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1482 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1483 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1485 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1486 "status=%d aid=%d)\n",
1487 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1488 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1490 pos
= mgmt
->u
.assoc_resp
.variable
;
1491 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1493 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1494 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1495 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1497 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1498 ms
= tu
* 1024 / 1000;
1499 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1500 "comeback duration %u TU (%u ms)\n",
1501 sdata
->dev
->name
, tu
, ms
);
1502 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1503 mod_timer(&ifmgd
->timer
,
1504 jiffies
+ msecs_to_jiffies(ms
));
1508 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1509 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1510 sdata
->dev
->name
, status_code
);
1511 /* if this was a reassociation, ensure we try a "full"
1512 * association next time. This works around some broken APs
1513 * which do not correctly reject reassociation requests. */
1514 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1515 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1516 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1517 /* Wait for SME to decide what to do next */
1518 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1523 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1524 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1525 "set\n", sdata
->dev
->name
, aid
);
1526 aid
&= ~(BIT(15) | BIT(14));
1528 if (!elems
.supp_rates
) {
1529 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1534 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1536 ifmgd
->ap_capab
= capab_info
;
1538 kfree(ifmgd
->assocresp_ies
);
1539 ifmgd
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1540 ifmgd
->assocresp_ies
= kmalloc(ifmgd
->assocresp_ies_len
, GFP_KERNEL
);
1541 if (ifmgd
->assocresp_ies
)
1542 memcpy(ifmgd
->assocresp_ies
, pos
, ifmgd
->assocresp_ies_len
);
1546 /* Add STA entry for the AP */
1547 sta
= sta_info_get(local
, ifmgd
->bssid
);
1551 sta
= sta_info_alloc(sdata
, ifmgd
->bssid
, GFP_ATOMIC
);
1553 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1554 " the AP\n", sdata
->dev
->name
);
1559 /* update new sta with its last rx activity */
1560 sta
->last_rx
= jiffies
;
1564 * FIXME: Do we really need to update the sta_info's information here?
1565 * We already know about the AP (we found it in our list) so it
1566 * should already be filled with the right info, no?
1567 * As is stands, all this is racy because typically we assume
1568 * the information that is filled in here (except flags) doesn't
1569 * change while a STA structure is alive. As such, it should move
1570 * to between the sta_info_alloc() and sta_info_insert() above.
1573 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
1574 WLAN_STA_AUTHORIZED
);
1578 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1580 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1581 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1582 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1585 have_higher_than_11mbit
= true;
1587 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1588 if (sband
->bitrates
[j
].bitrate
== rate
) {
1591 basic_rates
|= BIT(j
);
1597 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1598 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1599 bool is_basic
= !!(elems
.ext_supp_rates
[i
] & 0x80);
1602 have_higher_than_11mbit
= true;
1604 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1605 if (sband
->bitrates
[j
].bitrate
== rate
) {
1608 basic_rates
|= BIT(j
);
1614 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1615 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1617 /* cf. IEEE 802.11 9.2.12 */
1618 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1619 have_higher_than_11mbit
)
1620 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1622 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1624 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1625 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1626 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1627 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1629 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1631 rate_control_rate_init(sta
);
1633 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1634 set_sta_flags(sta
, WLAN_STA_MFP
);
1636 if (elems
.wmm_param
)
1637 set_sta_flags(sta
, WLAN_STA_WME
);
1640 int err
= sta_info_insert(sta
);
1642 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1643 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1651 if (elems
.wmm_param
)
1652 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1653 elems
.wmm_param_len
);
1655 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1656 (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
1657 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1658 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1661 /* set AID and assoc capability,
1662 * ieee80211_set_associated() will tell the driver */
1663 bss_conf
->aid
= aid
;
1664 bss_conf
->assoc_capability
= capab_info
;
1665 ieee80211_set_associated(sdata
, changed
);
1668 * initialise the time of last beacon to be the association time,
1669 * otherwise beacon loss check will trigger immediately
1671 ifmgd
->last_beacon
= jiffies
;
1673 ieee80211_associated(sdata
);
1674 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1678 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1679 struct ieee80211_mgmt
*mgmt
,
1681 struct ieee80211_rx_status
*rx_status
,
1682 struct ieee802_11_elems
*elems
,
1685 struct ieee80211_local
*local
= sdata
->local
;
1687 struct ieee80211_bss
*bss
;
1688 struct ieee80211_channel
*channel
;
1690 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1691 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1693 freq
= rx_status
->freq
;
1695 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1697 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1700 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1705 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1706 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
) == 0)) {
1707 struct ieee80211_channel_sw_ie
*sw_elem
=
1708 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1709 ieee80211_process_chanswitch(sdata
, sw_elem
, bss
);
1712 ieee80211_rx_bss_put(local
, bss
);
1716 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1717 struct ieee80211_mgmt
*mgmt
,
1719 struct ieee80211_rx_status
*rx_status
)
1721 struct ieee80211_if_managed
*ifmgd
;
1723 struct ieee802_11_elems elems
;
1725 ifmgd
= &sdata
->u
.mgd
;
1727 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1728 return; /* ignore ProbeResp to foreign address */
1730 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1734 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1737 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1739 /* direct probe may be part of the association flow */
1740 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
1742 printk(KERN_DEBUG
"%s direct probe responded\n",
1744 ieee80211_authenticate(sdata
);
1747 if (ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
)
1748 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1752 * This is the canonical list of information elements we care about,
1753 * the filter code also gives us all changes to the Microsoft OUI
1754 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1756 * We implement beacon filtering in software since that means we can
1757 * avoid processing the frame here and in cfg80211, and userspace
1758 * will not be able to tell whether the hardware supports it or not.
1760 * XXX: This list needs to be dynamic -- userspace needs to be able to
1761 * add items it requires. It also needs to be able to tell us to
1762 * look out for other vendor IEs.
1764 static const u64 care_about_ies
=
1765 (1ULL << WLAN_EID_COUNTRY
) |
1766 (1ULL << WLAN_EID_ERP_INFO
) |
1767 (1ULL << WLAN_EID_CHANNEL_SWITCH
) |
1768 (1ULL << WLAN_EID_PWR_CONSTRAINT
) |
1769 (1ULL << WLAN_EID_HT_CAPABILITY
) |
1770 (1ULL << WLAN_EID_HT_INFORMATION
);
1772 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1773 struct ieee80211_mgmt
*mgmt
,
1775 struct ieee80211_rx_status
*rx_status
)
1777 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1779 struct ieee802_11_elems elems
;
1780 struct ieee80211_local
*local
= sdata
->local
;
1782 bool erp_valid
, directed_tim
= false;
1786 /* Process beacon from the current BSS */
1787 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1791 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1794 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1795 memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1798 ncrc
= crc32_be(0, (void *)&mgmt
->u
.beacon
.beacon_int
, 4);
1799 ncrc
= ieee802_11_parse_elems_crc(mgmt
->u
.beacon
.variable
,
1800 len
- baselen
, &elems
,
1801 care_about_ies
, ncrc
);
1803 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
1804 directed_tim
= ieee80211_check_tim(elems
.tim
, elems
.tim_len
,
1807 ncrc
= crc32_be(ncrc
, (void *)&directed_tim
, sizeof(directed_tim
));
1809 if (ncrc
== ifmgd
->beacon_crc
)
1811 ifmgd
->beacon_crc
= ncrc
;
1813 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, true);
1815 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1816 elems
.wmm_param_len
);
1818 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1820 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1821 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1822 ieee80211_hw_config(local
,
1823 IEEE80211_CONF_CHANGE_PS
);
1824 ieee80211_send_nullfunc(local
, sdata
, 0);
1826 local
->pspolling
= true;
1829 * Here is assumed that the driver will be
1830 * able to send ps-poll frame and receive a
1831 * response even though power save mode is
1832 * enabled, but some drivers might require
1833 * to disable power save here. This needs
1834 * to be investigated.
1836 ieee80211_send_pspoll(local
, sdata
);
1841 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1843 erp_value
= elems
.erp_info
[0];
1847 changed
|= ieee80211_handle_bss_capability(sdata
,
1848 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1849 erp_valid
, erp_value
);
1852 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1853 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
)) {
1854 struct sta_info
*sta
;
1855 struct ieee80211_supported_band
*sband
;
1856 u16 ap_ht_cap_flags
;
1860 sta
= sta_info_get(local
, ifmgd
->bssid
);
1866 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1868 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1869 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1871 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1875 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1879 if (elems
.country_elem
) {
1880 /* Note we are only reviewing this on beacons
1881 * for the BSSID we are associated to */
1882 regulatory_hint_11d(local
->hw
.wiphy
,
1883 elems
.country_elem
, elems
.country_elem_len
);
1885 /* TODO: IBSS also needs this */
1886 if (elems
.pwr_constr_elem
)
1887 ieee80211_handle_pwr_constr(sdata
,
1888 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1889 elems
.pwr_constr_elem
,
1890 elems
.pwr_constr_elem_len
);
1893 ieee80211_bss_info_change_notify(sdata
, changed
);
1896 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
1897 struct sk_buff
*skb
,
1898 struct ieee80211_rx_status
*rx_status
)
1900 struct ieee80211_local
*local
= sdata
->local
;
1901 struct ieee80211_mgmt
*mgmt
;
1905 return RX_DROP_MONITOR
;
1907 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1908 fc
= le16_to_cpu(mgmt
->frame_control
);
1910 switch (fc
& IEEE80211_FCTL_STYPE
) {
1911 case IEEE80211_STYPE_PROBE_REQ
:
1912 case IEEE80211_STYPE_PROBE_RESP
:
1913 case IEEE80211_STYPE_BEACON
:
1914 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
1915 case IEEE80211_STYPE_AUTH
:
1916 case IEEE80211_STYPE_ASSOC_RESP
:
1917 case IEEE80211_STYPE_REASSOC_RESP
:
1918 case IEEE80211_STYPE_DEAUTH
:
1919 case IEEE80211_STYPE_DISASSOC
:
1920 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
1921 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
1925 return RX_DROP_MONITOR
;
1928 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1929 struct sk_buff
*skb
)
1931 struct ieee80211_rx_status
*rx_status
;
1932 struct ieee80211_mgmt
*mgmt
;
1935 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1936 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1937 fc
= le16_to_cpu(mgmt
->frame_control
);
1939 switch (fc
& IEEE80211_FCTL_STYPE
) {
1940 case IEEE80211_STYPE_PROBE_RESP
:
1941 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
,
1944 case IEEE80211_STYPE_BEACON
:
1945 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1948 case IEEE80211_STYPE_AUTH
:
1949 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
1951 case IEEE80211_STYPE_ASSOC_RESP
:
1952 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 0);
1954 case IEEE80211_STYPE_REASSOC_RESP
:
1955 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 1);
1957 case IEEE80211_STYPE_DEAUTH
:
1958 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1960 case IEEE80211_STYPE_DISASSOC
:
1961 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1968 static void ieee80211_sta_timer(unsigned long data
)
1970 struct ieee80211_sub_if_data
*sdata
=
1971 (struct ieee80211_sub_if_data
*) data
;
1972 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1973 struct ieee80211_local
*local
= sdata
->local
;
1975 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
1976 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1979 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
)
1981 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1982 struct ieee80211_local
*local
= sdata
->local
;
1984 if (local
->ops
->reset_tsf
) {
1985 /* Reset own TSF to allow time synchronization work. */
1986 local
->ops
->reset_tsf(local_to_hw(local
));
1989 ifmgd
->wmm_last_param_set
= -1; /* allow any WMM update */
1992 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1993 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
1994 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1995 ifmgd
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
1996 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1997 ifmgd
->auth_alg
= WLAN_AUTH_LEAP
;
1998 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_FT
)
1999 ifmgd
->auth_alg
= WLAN_AUTH_FT
;
2001 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
2002 ifmgd
->auth_transaction
= -1;
2003 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
2004 ifmgd
->assoc_scan_tries
= 0;
2005 ifmgd
->direct_probe_tries
= 0;
2006 ifmgd
->auth_tries
= 0;
2007 ifmgd
->assoc_tries
= 0;
2008 netif_tx_stop_all_queues(sdata
->dev
);
2009 netif_carrier_off(sdata
->dev
);
2012 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
)
2014 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2015 struct ieee80211_local
*local
= sdata
->local
;
2016 struct ieee80211_bss
*bss
;
2017 u8
*bssid
= ifmgd
->bssid
, *ssid
= ifmgd
->ssid
;
2018 u8 ssid_len
= ifmgd
->ssid_len
;
2019 u16 capa_mask
= WLAN_CAPABILITY_ESS
;
2020 u16 capa_val
= WLAN_CAPABILITY_ESS
;
2021 struct ieee80211_channel
*chan
= local
->oper_channel
;
2023 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
2024 ifmgd
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
2025 IEEE80211_STA_AUTO_BSSID_SEL
|
2026 IEEE80211_STA_AUTO_CHANNEL_SEL
)) {
2027 capa_mask
|= WLAN_CAPABILITY_PRIVACY
;
2028 if (sdata
->default_key
)
2029 capa_val
|= WLAN_CAPABILITY_PRIVACY
;
2032 if (ifmgd
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
2035 if (ifmgd
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
2038 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) {
2043 bss
= (void *)cfg80211_get_bss(local
->hw
.wiphy
, chan
,
2044 bssid
, ssid
, ssid_len
,
2045 capa_mask
, capa_val
);
2048 ieee80211_set_freq(sdata
, bss
->cbss
.channel
->center_freq
);
2049 if (!(ifmgd
->flags
& IEEE80211_STA_SSID_SET
))
2050 ieee80211_sta_set_ssid(sdata
, bss
->ssid
,
2052 ieee80211_sta_set_bssid(sdata
, bss
->cbss
.bssid
);
2053 ieee80211_sta_def_wmm_params(sdata
, bss
->supp_rates_len
,
2055 if (sdata
->u
.mgd
.mfp
== IEEE80211_MFP_REQUIRED
)
2056 sdata
->u
.mgd
.flags
|= IEEE80211_STA_MFP_ENABLED
;
2058 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2060 /* Send out direct probe if no probe resp was received or
2061 * the one we have is outdated
2063 if (!bss
->last_probe_resp
||
2064 time_after(jiffies
, bss
->last_probe_resp
2065 + IEEE80211_SCAN_RESULT_EXPIRE
))
2066 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
2068 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2070 ieee80211_rx_bss_put(local
, bss
);
2071 ieee80211_sta_reset_auth(sdata
);
2074 if (ifmgd
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
2075 ifmgd
->assoc_scan_tries
++;
2076 /* XXX maybe racy? */
2077 if (local
->scan_req
)
2079 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
2080 ifmgd
->ssid
, IEEE80211_MAX_SSID_LEN
);
2081 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
2082 local
->int_scan_req
.ssids
[0].ssid_len
= 0;
2084 local
->int_scan_req
.ssids
[0].ssid_len
= ifmgd
->ssid_len
;
2086 if (ieee80211_start_scan(sdata
, &local
->int_scan_req
))
2087 ieee80211_scan_failed(local
);
2089 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2090 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
2092 ifmgd
->assoc_scan_tries
= 0;
2093 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
2100 static void ieee80211_sta_work(struct work_struct
*work
)
2102 struct ieee80211_sub_if_data
*sdata
=
2103 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
2104 struct ieee80211_local
*local
= sdata
->local
;
2105 struct ieee80211_if_managed
*ifmgd
;
2106 struct sk_buff
*skb
;
2108 if (!netif_running(sdata
->dev
))
2111 if (local
->sw_scanning
|| local
->hw_scanning
)
2114 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2116 ifmgd
= &sdata
->u
.mgd
;
2118 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
2119 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2121 if (ifmgd
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
2122 ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
2123 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
2124 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifmgd
->request
)) {
2126 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
2127 * (which queued ieee80211_sta_work) did not return an error. Thus, call
2128 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
2129 * notify the scan requester.
2131 if (ieee80211_start_scan(sdata
, local
->scan_req
))
2132 ieee80211_scan_failed(local
);
2136 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
)) {
2137 if (ieee80211_sta_config_auth(sdata
))
2139 clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2140 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
))
2143 switch (ifmgd
->state
) {
2144 case IEEE80211_STA_MLME_DISABLED
:
2146 case IEEE80211_STA_MLME_DIRECT_PROBE
:
2147 ieee80211_direct_probe(sdata
);
2149 case IEEE80211_STA_MLME_AUTHENTICATE
:
2150 ieee80211_authenticate(sdata
);
2152 case IEEE80211_STA_MLME_ASSOCIATE
:
2153 ieee80211_associate(sdata
);
2155 case IEEE80211_STA_MLME_ASSOCIATED
:
2156 ieee80211_associated(sdata
);
2163 if (ieee80211_privacy_mismatch(sdata
)) {
2164 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2165 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
2167 ieee80211_set_disassoc(sdata
, false, true,
2168 WLAN_REASON_UNSPECIFIED
);
2172 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2174 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2176 * Need to update last_beacon to avoid beacon loss
2179 sdata
->u
.mgd
.last_beacon
= jiffies
;
2182 queue_work(sdata
->local
->hw
.workqueue
,
2183 &sdata
->u
.mgd
.work
);
2187 /* interface setup */
2188 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2190 struct ieee80211_if_managed
*ifmgd
;
2193 ifmgd
= &sdata
->u
.mgd
;
2194 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
2195 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
2196 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
2197 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
2198 (unsigned long) sdata
);
2199 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
2200 (unsigned long) sdata
);
2201 skb_queue_head_init(&ifmgd
->skb_queue
);
2203 ifmgd
->capab
= WLAN_CAPABILITY_ESS
;
2204 ifmgd
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
2205 IEEE80211_AUTH_ALG_SHARED_KEY
;
2206 ifmgd
->flags
|= IEEE80211_STA_CREATE_IBSS
|
2207 IEEE80211_STA_AUTO_BSSID_SEL
|
2208 IEEE80211_STA_AUTO_CHANNEL_SEL
;
2209 if (sdata
->local
->hw
.queues
>= 4)
2210 ifmgd
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2212 hw_flags
= sdata
->local
->hw
.flags
;
2214 if (hw_flags
& IEEE80211_HW_SUPPORTS_PS
) {
2215 ifmgd
->powersave
= CONFIG_MAC80211_DEFAULT_PS_VALUE
;
2216 sdata
->local
->hw
.conf
.dynamic_ps_timeout
= 500;
2220 /* configuration hooks */
2221 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
)
2223 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2224 struct ieee80211_local
*local
= sdata
->local
;
2226 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2229 if ((ifmgd
->flags
& (IEEE80211_STA_BSSID_SET
|
2230 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
2231 (ifmgd
->flags
& (IEEE80211_STA_SSID_SET
|
2232 IEEE80211_STA_AUTO_SSID_SEL
))) {
2234 if (ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
2235 ieee80211_set_disassoc(sdata
, true, true,
2236 WLAN_REASON_DEAUTH_LEAVING
);
2238 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) ||
2239 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
2240 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
2241 else if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
)
2242 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
2243 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
2247 int ieee80211_sta_commit(struct ieee80211_sub_if_data
*sdata
)
2249 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2251 if (ifmgd
->ssid_len
)
2252 ifmgd
->flags
|= IEEE80211_STA_SSID_SET
;
2254 ifmgd
->flags
&= ~IEEE80211_STA_SSID_SET
;
2259 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
2261 struct ieee80211_if_managed
*ifmgd
;
2263 if (len
> IEEE80211_MAX_SSID_LEN
)
2266 ifmgd
= &sdata
->u
.mgd
;
2268 if (ifmgd
->ssid_len
!= len
|| memcmp(ifmgd
->ssid
, ssid
, len
) != 0) {
2270 * Do not use reassociation if SSID is changed (different ESS).
2272 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
2273 memset(ifmgd
->ssid
, 0, sizeof(ifmgd
->ssid
));
2274 memcpy(ifmgd
->ssid
, ssid
, len
);
2275 ifmgd
->ssid_len
= len
;
2278 return ieee80211_sta_commit(sdata
);
2281 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
2283 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2284 memcpy(ssid
, ifmgd
->ssid
, ifmgd
->ssid_len
);
2285 *len
= ifmgd
->ssid_len
;
2289 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2291 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2293 if (is_valid_ether_addr(bssid
)) {
2294 memcpy(ifmgd
->bssid
, bssid
, ETH_ALEN
);
2295 ifmgd
->flags
|= IEEE80211_STA_BSSID_SET
;
2297 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
2298 ifmgd
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2301 if (netif_running(sdata
->dev
)) {
2302 if (ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
)) {
2303 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2304 "the low-level driver\n", sdata
->dev
->name
);
2308 return ieee80211_sta_commit(sdata
);
2311 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
,
2312 const char *ie
, size_t len
)
2314 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2316 kfree(ifmgd
->extra_ie
);
2318 ifmgd
->extra_ie
= NULL
;
2319 ifmgd
->extra_ie_len
= 0;
2322 ifmgd
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2323 if (!ifmgd
->extra_ie
) {
2324 ifmgd
->extra_ie_len
= 0;
2327 memcpy(ifmgd
->extra_ie
, ie
, len
);
2328 ifmgd
->extra_ie_len
= len
;
2332 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2334 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2335 sdata
->dev
->name
, reason
);
2337 ieee80211_set_disassoc(sdata
, true, true, reason
);
2341 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2343 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2345 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2346 sdata
->dev
->name
, reason
);
2348 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
))
2351 ieee80211_set_disassoc(sdata
, false, true, reason
);
2355 /* scan finished notification */
2356 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2358 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2360 /* Restart STA timers */
2362 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2363 ieee80211_restart_sta_timer(sdata
);
2367 int ieee80211_max_network_latency(struct notifier_block
*nb
,
2368 unsigned long data
, void *dummy
)
2370 s32 latency_usec
= (s32
) data
;
2371 struct ieee80211_local
*local
=
2372 container_of(nb
, struct ieee80211_local
,
2373 network_latency_notifier
);
2375 mutex_lock(&local
->iflist_mtx
);
2376 ieee80211_recalc_ps(local
, latency_usec
);
2377 mutex_unlock(&local
->iflist_mtx
);