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
) {
83 /* frame sending functions */
85 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
)
87 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
88 struct ieee80211_local
*local
= sdata
->local
;
90 struct ieee80211_mgmt
*mgmt
;
91 u8
*pos
, *ies
, *ht_ie
;
92 int i
, len
, count
, rates_len
, supp_rates_len
;
94 struct ieee80211_bss
*bss
;
96 struct ieee80211_supported_band
*sband
;
99 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
100 sizeof(*mgmt
) + 200 + ifmgd
->extra_ie_len
+
103 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
104 "frame\n", sdata
->dev
->name
);
107 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
109 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
111 capab
= ifmgd
->capab
;
113 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
114 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
115 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
116 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
117 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
120 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
121 local
->hw
.conf
.channel
->center_freq
,
122 ifmgd
->ssid
, ifmgd
->ssid_len
);
124 if (bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
)
125 capab
|= WLAN_CAPABILITY_PRIVACY
;
129 /* get all rates supported by the device and the AP as
130 * some APs don't like getting a superset of their rates
131 * in the association request (e.g. D-Link DAP 1353 in
133 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
135 if ((bss
->cbss
.capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
136 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
137 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
139 ieee80211_rx_bss_put(local
, bss
);
142 rates_len
= sband
->n_bitrates
;
145 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
147 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
148 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
149 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
151 if (ifmgd
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
153 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
154 IEEE80211_STYPE_REASSOC_REQ
);
155 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
156 mgmt
->u
.reassoc_req
.listen_interval
=
157 cpu_to_le16(local
->hw
.conf
.listen_interval
);
158 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifmgd
->prev_bssid
,
162 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
163 IEEE80211_STYPE_ASSOC_REQ
);
164 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
165 mgmt
->u
.assoc_req
.listen_interval
=
166 cpu_to_le16(local
->hw
.conf
.listen_interval
);
170 ies
= pos
= skb_put(skb
, 2 + ifmgd
->ssid_len
);
171 *pos
++ = WLAN_EID_SSID
;
172 *pos
++ = ifmgd
->ssid_len
;
173 memcpy(pos
, ifmgd
->ssid
, ifmgd
->ssid_len
);
175 /* add all rates which were marked to be used above */
176 supp_rates_len
= rates_len
;
177 if (supp_rates_len
> 8)
180 len
= sband
->n_bitrates
;
181 pos
= skb_put(skb
, supp_rates_len
+ 2);
182 *pos
++ = WLAN_EID_SUPP_RATES
;
183 *pos
++ = supp_rates_len
;
186 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
187 if (BIT(i
) & rates
) {
188 int rate
= sband
->bitrates
[i
].bitrate
;
189 *pos
++ = (u8
) (rate
/ 5);
195 if (rates_len
> count
) {
196 pos
= skb_put(skb
, rates_len
- count
+ 2);
197 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
198 *pos
++ = rates_len
- count
;
200 for (i
++; i
< sband
->n_bitrates
; i
++) {
201 if (BIT(i
) & rates
) {
202 int rate
= sband
->bitrates
[i
].bitrate
;
203 *pos
++ = (u8
) (rate
/ 5);
208 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
209 /* 1. power capabilities */
210 pos
= skb_put(skb
, 4);
211 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
213 *pos
++ = 0; /* min tx power */
214 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
216 /* 2. supported channels */
217 /* TODO: get this in reg domain format */
218 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
219 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
220 *pos
++ = 2 * sband
->n_channels
;
221 for (i
= 0; i
< sband
->n_channels
; i
++) {
222 *pos
++ = ieee80211_frequency_to_channel(
223 sband
->channels
[i
].center_freq
);
224 *pos
++ = 1; /* one channel in the subband*/
228 if (ifmgd
->extra_ie
) {
229 pos
= skb_put(skb
, ifmgd
->extra_ie_len
);
230 memcpy(pos
, ifmgd
->extra_ie
, ifmgd
->extra_ie_len
);
233 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
234 pos
= skb_put(skb
, 9);
235 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
236 *pos
++ = 7; /* len */
237 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
240 *pos
++ = 2; /* WME */
241 *pos
++ = 0; /* WME info */
242 *pos
++ = 1; /* WME ver */
246 /* wmm support is a must to HT */
248 * IEEE802.11n does not allow TKIP/WEP as pairwise
249 * ciphers in HT mode. We still associate in non-ht
250 * mode (11a/b/g) if any one of these ciphers is
251 * configured as pairwise.
253 if (wmm
&& (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
254 sband
->ht_cap
.ht_supported
&&
255 (ht_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_INFORMATION
)) &&
256 ht_ie
[1] >= sizeof(struct ieee80211_ht_info
) &&
257 (!(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))) {
258 struct ieee80211_ht_info
*ht_info
=
259 (struct ieee80211_ht_info
*)(ht_ie
+ 2);
260 u16 cap
= sband
->ht_cap
.cap
;
262 u32 flags
= local
->hw
.conf
.channel
->flags
;
264 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
265 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
266 if (flags
& IEEE80211_CHAN_NO_FAT_ABOVE
) {
267 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
268 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
271 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
272 if (flags
& IEEE80211_CHAN_NO_FAT_BELOW
) {
273 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
274 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
279 tmp
= cpu_to_le16(cap
);
280 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
281 *pos
++ = WLAN_EID_HT_CAPABILITY
;
282 *pos
++ = sizeof(struct ieee80211_ht_cap
);
283 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
284 memcpy(pos
, &tmp
, sizeof(u16
));
286 /* TODO: needs a define here for << 2 */
287 *pos
++ = sband
->ht_cap
.ampdu_factor
|
288 (sband
->ht_cap
.ampdu_density
<< 2);
289 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
292 kfree(ifmgd
->assocreq_ies
);
293 ifmgd
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
294 ifmgd
->assocreq_ies
= kmalloc(ifmgd
->assocreq_ies_len
, GFP_KERNEL
);
295 if (ifmgd
->assocreq_ies
)
296 memcpy(ifmgd
->assocreq_ies
, ies
, ifmgd
->assocreq_ies_len
);
298 ieee80211_tx_skb(sdata
, skb
, 0);
302 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
303 u16 stype
, u16 reason
)
305 struct ieee80211_local
*local
= sdata
->local
;
306 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
308 struct ieee80211_mgmt
*mgmt
;
310 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
312 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
313 "deauth/disassoc frame\n", sdata
->dev
->name
);
316 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
318 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
320 memcpy(mgmt
->da
, ifmgd
->bssid
, ETH_ALEN
);
321 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
322 memcpy(mgmt
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
323 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
325 /* u.deauth.reason_code == u.disassoc.reason_code */
326 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
328 ieee80211_tx_skb(sdata
, skb
, ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
);
331 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
332 struct ieee80211_sub_if_data
*sdata
)
334 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
335 struct ieee80211_pspoll
*pspoll
;
339 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
341 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
342 "pspoll frame\n", sdata
->dev
->name
);
345 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
347 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
348 memset(pspoll
, 0, sizeof(*pspoll
));
349 fc
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
| IEEE80211_FCTL_PM
;
350 pspoll
->frame_control
= cpu_to_le16(fc
);
351 pspoll
->aid
= cpu_to_le16(ifmgd
->aid
);
353 /* aid in PS-Poll has its two MSBs each set to 1 */
354 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
356 memcpy(pspoll
->bssid
, ifmgd
->bssid
, ETH_ALEN
);
357 memcpy(pspoll
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
359 ieee80211_tx_skb(sdata
, skb
, 0);
363 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
364 struct ieee80211_if_managed
*ifmgd
,
365 u8
*wmm_param
, size_t wmm_param_len
)
367 struct ieee80211_tx_queue_params params
;
372 if (!(ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
))
378 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
380 count
= wmm_param
[6] & 0x0f;
381 if (count
== ifmgd
->wmm_last_param_set
)
383 ifmgd
->wmm_last_param_set
= count
;
386 left
= wmm_param_len
- 8;
388 memset(¶ms
, 0, sizeof(params
));
391 for (; left
>= 4; left
-= 4, pos
+= 4) {
392 int aci
= (pos
[0] >> 5) & 0x03;
393 int acm
= (pos
[0] >> 4) & 0x01;
400 local
->wmm_acm
|= BIT(1) | BIT(2); /* BK/- */
405 local
->wmm_acm
|= BIT(4) | BIT(5); /* CL/VI */
410 local
->wmm_acm
|= BIT(6) | BIT(7); /* VO/NC */
416 local
->wmm_acm
|= BIT(0) | BIT(3); /* BE/EE */
420 params
.aifs
= pos
[0] & 0x0f;
421 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
422 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
423 params
.txop
= get_unaligned_le16(pos
+ 2);
424 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
425 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
426 "cWmin=%d cWmax=%d txop=%d\n",
427 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
428 params
.cw_max
, params
.txop
);
430 if (local
->ops
->conf_tx
&&
431 local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
432 printk(KERN_DEBUG
"%s: failed to set TX queue "
433 "parameters for queue %d\n", local
->mdev
->name
, queue
);
438 static bool ieee80211_check_tim(struct ieee802_11_elems
*elems
, u16 aid
)
441 u8 index
, indexn1
, indexn2
;
442 struct ieee80211_tim_ie
*tim
= (struct ieee80211_tim_ie
*) elems
->tim
;
446 mask
= 1 << (aid
& 7);
448 indexn1
= tim
->bitmap_ctrl
& 0xfe;
449 indexn2
= elems
->tim_len
+ indexn1
- 4;
451 if (index
< indexn1
|| index
> indexn2
)
456 return !!(tim
->virtual_map
[index
] & mask
);
459 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
460 u16 capab
, bool erp_valid
, u8 erp
)
462 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
463 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
464 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
468 bool use_short_preamble
;
472 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
473 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
475 use_protection
= false;
476 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
479 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
481 if (use_protection
!= bss_conf
->use_cts_prot
) {
482 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
483 if (net_ratelimit()) {
484 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID=%pM)\n",
486 use_protection
? "enabled" : "disabled",
490 bss_conf
->use_cts_prot
= use_protection
;
491 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
494 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
495 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
496 if (net_ratelimit()) {
497 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
500 use_short_preamble
? "short" : "long",
504 bss_conf
->use_short_preamble
= use_short_preamble
;
505 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
508 if (use_short_slot
!= bss_conf
->use_short_slot
) {
509 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
510 if (net_ratelimit()) {
511 printk(KERN_DEBUG
"%s: switched to %s slot time"
514 use_short_slot
? "short" : "long",
518 bss_conf
->use_short_slot
= use_short_slot
;
519 changed
|= BSS_CHANGED_ERP_SLOT
;
525 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
)
527 union iwreq_data wrqu
;
529 memset(&wrqu
, 0, sizeof(wrqu
));
530 if (sdata
->u
.mgd
.flags
& IEEE80211_STA_ASSOCIATED
)
531 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
532 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
533 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
536 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
)
538 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
542 union iwreq_data wrqu
;
544 if (!ifmgd
->assocreq_ies
&& !ifmgd
->assocresp_ies
)
547 buf
= kmalloc(50 + 2 * (ifmgd
->assocreq_ies_len
+
548 ifmgd
->assocresp_ies_len
), GFP_KERNEL
);
552 len
= sprintf(buf
, "ASSOCINFO(");
553 if (ifmgd
->assocreq_ies
) {
554 len
+= sprintf(buf
+ len
, "ReqIEs=");
555 for (i
= 0; i
< ifmgd
->assocreq_ies_len
; i
++) {
556 len
+= sprintf(buf
+ len
, "%02x",
557 ifmgd
->assocreq_ies
[i
]);
560 if (ifmgd
->assocresp_ies
) {
561 if (ifmgd
->assocreq_ies
)
562 len
+= sprintf(buf
+ len
, " ");
563 len
+= sprintf(buf
+ len
, "RespIEs=");
564 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
565 len
+= sprintf(buf
+ len
, "%02x",
566 ifmgd
->assocresp_ies
[i
]);
569 len
+= sprintf(buf
+ len
, ")");
571 if (len
> IW_CUSTOM_MAX
) {
572 len
= sprintf(buf
, "ASSOCRESPIE=");
573 for (i
= 0; i
< ifmgd
->assocresp_ies_len
; i
++) {
574 len
+= sprintf(buf
+ len
, "%02x",
575 ifmgd
->assocresp_ies
[i
]);
579 if (len
<= IW_CUSTOM_MAX
) {
580 memset(&wrqu
, 0, sizeof(wrqu
));
581 wrqu
.data
.length
= len
;
582 wireless_send_event(sdata
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
589 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
590 u32 bss_info_changed
)
592 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
593 struct ieee80211_local
*local
= sdata
->local
;
594 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
596 struct ieee80211_bss
*bss
;
598 bss_info_changed
|= BSS_CHANGED_ASSOC
;
599 ifmgd
->flags
|= IEEE80211_STA_ASSOCIATED
;
601 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
602 conf
->channel
->center_freq
,
603 ifmgd
->ssid
, ifmgd
->ssid_len
);
605 /* set timing information */
606 sdata
->vif
.bss_conf
.beacon_int
= bss
->cbss
.beacon_interval
;
607 sdata
->vif
.bss_conf
.timestamp
= bss
->cbss
.tsf
;
608 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
610 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
611 bss
->cbss
.capability
, bss
->has_erp_value
, bss
->erp_value
);
613 cfg80211_hold_bss(&bss
->cbss
);
615 ieee80211_rx_bss_put(local
, bss
);
618 ifmgd
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
619 memcpy(ifmgd
->prev_bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
620 ieee80211_sta_send_associnfo(sdata
);
622 ifmgd
->last_probe
= jiffies
;
623 ieee80211_led_assoc(local
, 1);
625 sdata
->vif
.bss_conf
.assoc
= 1;
627 * For now just always ask the driver to update the basic rateset
628 * when we have associated, we aren't checking whether it actually
631 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
632 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
634 if (local
->powersave
) {
635 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
) &&
636 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
637 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
639 local
->hw
.conf
.dynamic_ps_timeout
));
641 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
642 ieee80211_send_nullfunc(local
, sdata
, 1);
643 conf
->flags
|= IEEE80211_CONF_PS
;
644 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
648 netif_tx_start_all_queues(sdata
->dev
);
649 netif_carrier_on(sdata
->dev
);
651 ieee80211_sta_send_apinfo(sdata
);
654 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
)
656 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
657 struct ieee80211_local
*local
= sdata
->local
;
659 ifmgd
->direct_probe_tries
++;
660 if (ifmgd
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
661 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
662 sdata
->dev
->name
, ifmgd
->bssid
);
663 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
664 ieee80211_sta_send_apinfo(sdata
);
667 * Most likely AP is not in the range so remove the
668 * bss information associated to the AP
670 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
671 sdata
->local
->hw
.conf
.channel
->center_freq
,
672 ifmgd
->ssid
, ifmgd
->ssid_len
);
675 * We might have a pending scan which had no chance to run yet
676 * due to state == IEEE80211_STA_MLME_DIRECT_PROBE.
677 * Hence, queue the STAs work again
679 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
683 printk(KERN_DEBUG
"%s: direct probe to AP %pM try %d\n",
684 sdata
->dev
->name
, ifmgd
->bssid
,
685 ifmgd
->direct_probe_tries
);
687 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
689 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifmgd
->request
);
691 /* Direct probe is sent to broadcast address as some APs
692 * will not answer to direct packet in unassociated state.
694 ieee80211_send_probe_req(sdata
, NULL
,
695 ifmgd
->ssid
, ifmgd
->ssid_len
, NULL
, 0);
697 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
701 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
)
703 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
704 struct ieee80211_local
*local
= sdata
->local
;
709 if (ifmgd
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
710 printk(KERN_DEBUG
"%s: authentication with AP %pM"
712 sdata
->dev
->name
, ifmgd
->bssid
);
713 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
714 ieee80211_sta_send_apinfo(sdata
);
715 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
716 sdata
->local
->hw
.conf
.channel
->center_freq
,
717 ifmgd
->ssid
, ifmgd
->ssid_len
);
720 * We might have a pending scan which had no chance to run yet
721 * due to state == IEEE80211_STA_MLME_AUTHENTICATE.
722 * Hence, queue the STAs work again
724 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
728 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
729 printk(KERN_DEBUG
"%s: authenticate with AP %pM\n",
730 sdata
->dev
->name
, ifmgd
->bssid
);
732 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
733 ies
= ifmgd
->sme_auth_ie
;
734 ies_len
= ifmgd
->sme_auth_ie_len
;
739 ieee80211_send_auth(sdata
, 1, ifmgd
->auth_alg
, ies
, ies_len
,
741 ifmgd
->auth_transaction
= 2;
743 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
747 * The disassoc 'reason' argument can be either our own reason
748 * if self disconnected or a reason code from the AP.
750 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
751 bool deauth
, bool self_disconnected
,
754 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
755 struct ieee80211_local
*local
= sdata
->local
;
756 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
757 struct ieee80211_bss
*bss
;
758 struct sta_info
*sta
;
759 u32 changed
= 0, config_changed
= 0;
763 sta
= sta_info_get(local
, ifmgd
->bssid
);
770 ifmgd
->direct_probe_tries
= 0;
771 ifmgd
->auth_tries
= 0;
773 ifmgd
->assoc_scan_tries
= 0;
774 ifmgd
->assoc_tries
= 0;
776 netif_tx_stop_all_queues(sdata
->dev
);
777 netif_carrier_off(sdata
->dev
);
779 ieee80211_sta_tear_down_BA_sessions(sta
);
781 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
782 conf
->channel
->center_freq
,
783 ifmgd
->ssid
, ifmgd
->ssid_len
);
786 cfg80211_unhold_bss(&bss
->cbss
);
787 ieee80211_rx_bss_put(local
, bss
);
790 if (self_disconnected
) {
792 ieee80211_send_deauth_disassoc(sdata
,
793 IEEE80211_STYPE_DEAUTH
, reason
);
795 ieee80211_send_deauth_disassoc(sdata
,
796 IEEE80211_STYPE_DISASSOC
, reason
);
799 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
800 changed
|= ieee80211_reset_erp_info(sdata
);
802 ieee80211_led_assoc(local
, 0);
803 changed
|= BSS_CHANGED_ASSOC
;
804 sdata
->vif
.bss_conf
.assoc
= false;
806 ieee80211_sta_send_apinfo(sdata
);
808 if (self_disconnected
|| reason
== WLAN_REASON_DISASSOC_STA_HAS_LEFT
) {
809 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
810 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
811 sdata
->local
->hw
.conf
.channel
->center_freq
,
812 ifmgd
->ssid
, ifmgd
->ssid_len
);
817 /* channel(_type) changes are handled by ieee80211_hw_config */
818 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
820 local
->power_constr_level
= 0;
822 del_timer_sync(&local
->dynamic_ps_timer
);
823 cancel_work_sync(&local
->dynamic_ps_enable_work
);
825 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
826 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
827 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
830 ieee80211_hw_config(local
, config_changed
);
831 ieee80211_bss_info_change_notify(sdata
, changed
);
835 sta
= sta_info_get(local
, ifmgd
->bssid
);
841 sta_info_unlink(&sta
);
845 sta_info_destroy(sta
);
848 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
850 if (!sdata
|| !sdata
->default_key
||
851 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
856 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
)
858 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
859 struct ieee80211_local
*local
= sdata
->local
;
860 struct ieee80211_bss
*bss
;
865 if (!ifmgd
|| (ifmgd
->flags
& IEEE80211_STA_EXT_SME
))
868 bss
= ieee80211_rx_bss_get(local
, ifmgd
->bssid
,
869 local
->hw
.conf
.channel
->center_freq
,
870 ifmgd
->ssid
, ifmgd
->ssid_len
);
874 bss_privacy
= !!(bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
);
875 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
876 privacy_invoked
= !!(ifmgd
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
878 ieee80211_rx_bss_put(local
, bss
);
880 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
886 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
)
888 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
889 struct ieee80211_local
*local
= sdata
->local
;
891 ifmgd
->assoc_tries
++;
892 if (ifmgd
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
893 printk(KERN_DEBUG
"%s: association with AP %pM"
895 sdata
->dev
->name
, ifmgd
->bssid
);
896 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
897 ieee80211_sta_send_apinfo(sdata
);
898 ieee80211_rx_bss_remove(sdata
, ifmgd
->bssid
,
899 sdata
->local
->hw
.conf
.channel
->center_freq
,
900 ifmgd
->ssid
, ifmgd
->ssid_len
);
902 * We might have a pending scan which had no chance to run yet
903 * due to state == IEEE80211_STA_MLME_ASSOCIATE.
904 * Hence, queue the STAs work again
906 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
910 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
911 printk(KERN_DEBUG
"%s: associate with AP %pM\n",
912 sdata
->dev
->name
, ifmgd
->bssid
);
913 if (ieee80211_privacy_mismatch(sdata
)) {
914 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
915 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
916 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
920 ieee80211_send_assoc(sdata
);
922 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
925 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data
*sdata
,
926 struct ieee80211_hdr
*hdr
)
929 * We can postpone the mgd.timer whenever receiving unicast frames
930 * from AP because we know that the connection is working both ways
931 * at that time. But multicast frames (and hence also beacons) must
932 * be ignored here, because we need to trigger the timer during
933 * data idle periods for sending the periodical probe request to
936 if (!is_multicast_ether_addr(hdr
->addr1
))
937 mod_timer(&sdata
->u
.mgd
.timer
,
938 jiffies
+ IEEE80211_MONITORING_INTERVAL
);
941 void ieee80211_beacon_loss_work(struct work_struct
*work
)
943 struct ieee80211_sub_if_data
*sdata
=
944 container_of(work
, struct ieee80211_sub_if_data
,
945 u
.mgd
.beacon_loss_work
);
946 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
948 printk(KERN_DEBUG
"%s: driver reports beacon loss from AP %pM "
949 "- sending probe request\n", sdata
->dev
->name
,
952 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
953 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
954 ifmgd
->ssid_len
, NULL
, 0);
956 mod_timer(&ifmgd
->timer
, jiffies
+ IEEE80211_MONITORING_INTERVAL
);
959 void ieee80211_beacon_loss(struct ieee80211_vif
*vif
)
961 struct ieee80211_sub_if_data
*sdata
= vif_to_sdata(vif
);
963 queue_work(sdata
->local
->hw
.workqueue
,
964 &sdata
->u
.mgd
.beacon_loss_work
);
966 EXPORT_SYMBOL(ieee80211_beacon_loss
);
968 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
)
970 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
971 struct ieee80211_local
*local
= sdata
->local
;
972 struct sta_info
*sta
;
973 bool disassoc
= false;
975 /* TODO: start monitoring current AP signal quality and number of
976 * missed beacons. Scan other channels every now and then and search
978 /* TODO: remove expired BSSes */
980 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
984 sta
= sta_info_get(local
, ifmgd
->bssid
);
986 printk(KERN_DEBUG
"%s: No STA entry for own AP %pM\n",
987 sdata
->dev
->name
, ifmgd
->bssid
);
992 if ((ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
) &&
993 time_after(jiffies
, sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
994 printk(KERN_DEBUG
"%s: no probe response from AP %pM "
995 "- disassociating\n",
996 sdata
->dev
->name
, ifmgd
->bssid
);
998 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1003 * Beacon filtering is only enabled with power save and then the
1004 * stack should not check for beacon loss.
1006 if (!((local
->hw
.flags
& IEEE80211_HW_BEACON_FILTER
) &&
1007 (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)) &&
1009 ifmgd
->last_beacon
+ IEEE80211_MONITORING_INTERVAL
)) {
1010 printk(KERN_DEBUG
"%s: beacon loss from AP %pM "
1011 "- sending probe request\n",
1012 sdata
->dev
->name
, ifmgd
->bssid
);
1013 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1014 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1015 ifmgd
->ssid_len
, NULL
, 0);
1020 if (time_after(jiffies
, sta
->last_rx
+ IEEE80211_PROBE_IDLE_TIME
)) {
1021 ifmgd
->flags
|= IEEE80211_STA_PROBEREQ_POLL
;
1022 ieee80211_send_probe_req(sdata
, ifmgd
->bssid
, ifmgd
->ssid
,
1023 ifmgd
->ssid_len
, NULL
, 0);
1030 ieee80211_set_disassoc(sdata
, true, true,
1031 WLAN_REASON_PREV_AUTH_NOT_VALID
);
1033 mod_timer(&ifmgd
->timer
, jiffies
+
1034 IEEE80211_MONITORING_INTERVAL
);
1038 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
)
1040 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1042 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1043 ifmgd
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1044 if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
) {
1045 /* Wait for SME to request association */
1046 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1048 ieee80211_associate(sdata
);
1052 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1053 struct ieee80211_mgmt
*mgmt
,
1057 struct ieee802_11_elems elems
;
1059 pos
= mgmt
->u
.auth
.variable
;
1060 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1061 if (!elems
.challenge
)
1063 ieee80211_send_auth(sdata
, 3, sdata
->u
.mgd
.auth_alg
,
1064 elems
.challenge
- 2, elems
.challenge_len
+ 2,
1065 sdata
->u
.mgd
.bssid
, 1);
1066 sdata
->u
.mgd
.auth_transaction
= 4;
1069 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1070 struct ieee80211_mgmt
*mgmt
,
1073 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1074 u16 auth_alg
, auth_transaction
, status_code
;
1076 if (ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
)
1082 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1085 if (memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1088 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1089 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1090 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1092 if (auth_alg
!= ifmgd
->auth_alg
||
1093 auth_transaction
!= ifmgd
->auth_transaction
)
1096 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1097 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1099 const int num_algs
= ARRAY_SIZE(algs
);
1101 algs
[0] = algs
[1] = algs
[2] = 0xff;
1102 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1103 algs
[0] = WLAN_AUTH_OPEN
;
1104 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1105 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1106 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1107 algs
[2] = WLAN_AUTH_LEAP
;
1108 if (ifmgd
->auth_alg
== WLAN_AUTH_OPEN
)
1110 else if (ifmgd
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1114 for (i
= 0; i
< num_algs
; i
++) {
1116 if (pos
>= num_algs
)
1118 if (algs
[pos
] == ifmgd
->auth_alg
||
1121 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1122 !ieee80211_sta_wep_configured(sdata
))
1124 ifmgd
->auth_alg
= algs
[pos
];
1131 switch (ifmgd
->auth_alg
) {
1132 case WLAN_AUTH_OPEN
:
1133 case WLAN_AUTH_LEAP
:
1135 ieee80211_auth_completed(sdata
);
1136 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1138 case WLAN_AUTH_SHARED_KEY
:
1139 if (ifmgd
->auth_transaction
== 4) {
1140 ieee80211_auth_completed(sdata
);
1141 cfg80211_send_rx_auth(sdata
->dev
, (u8
*) mgmt
, len
);
1143 ieee80211_auth_challenge(sdata
, mgmt
, len
);
1149 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1150 struct ieee80211_mgmt
*mgmt
,
1153 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1159 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1162 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1164 if (ifmgd
->flags
& IEEE80211_STA_AUTHENTICATED
)
1165 printk(KERN_DEBUG
"%s: deauthenticated (Reason: %u)\n",
1166 sdata
->dev
->name
, reason_code
);
1168 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1169 (ifmgd
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1170 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1171 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)) {
1172 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1173 mod_timer(&ifmgd
->timer
, jiffies
+
1174 IEEE80211_RETRY_AUTH_INTERVAL
);
1177 ieee80211_set_disassoc(sdata
, true, false, 0);
1178 ifmgd
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1179 cfg80211_send_rx_deauth(sdata
->dev
, (u8
*) mgmt
, len
);
1183 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1184 struct ieee80211_mgmt
*mgmt
,
1187 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1193 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
))
1196 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1198 if (ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
)
1199 printk(KERN_DEBUG
"%s: disassociated (Reason: %u)\n",
1200 sdata
->dev
->name
, reason_code
);
1202 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1203 ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1204 ifmgd
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1205 mod_timer(&ifmgd
->timer
, jiffies
+
1206 IEEE80211_RETRY_AUTH_INTERVAL
);
1209 ieee80211_set_disassoc(sdata
, false, false, reason_code
);
1210 cfg80211_send_rx_disassoc(sdata
->dev
, (u8
*) mgmt
, len
);
1214 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1215 struct ieee80211_mgmt
*mgmt
,
1219 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1220 struct ieee80211_local
*local
= sdata
->local
;
1221 struct ieee80211_supported_band
*sband
;
1222 struct sta_info
*sta
;
1223 u32 rates
, basic_rates
;
1224 u16 capab_info
, status_code
, aid
;
1225 struct ieee802_11_elems elems
;
1226 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1230 bool have_higher_than_11mbit
= false, newsta
= false;
1231 u16 ap_ht_cap_flags
;
1233 /* AssocResp and ReassocResp have identical structure, so process both
1234 * of them in this function. */
1236 if (ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1242 if (memcmp(ifmgd
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1245 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1246 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1247 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1249 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1250 "status=%d aid=%d)\n",
1251 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1252 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1254 pos
= mgmt
->u
.assoc_resp
.variable
;
1255 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1257 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1258 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1259 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1261 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1262 ms
= tu
* 1024 / 1000;
1263 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1264 "comeback duration %u TU (%u ms)\n",
1265 sdata
->dev
->name
, tu
, ms
);
1266 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1267 mod_timer(&ifmgd
->timer
,
1268 jiffies
+ msecs_to_jiffies(ms
));
1272 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1273 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1274 sdata
->dev
->name
, status_code
);
1275 /* if this was a reassociation, ensure we try a "full"
1276 * association next time. This works around some broken APs
1277 * which do not correctly reject reassociation requests. */
1278 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1282 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1283 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1284 "set\n", sdata
->dev
->name
, aid
);
1285 aid
&= ~(BIT(15) | BIT(14));
1287 if (!elems
.supp_rates
) {
1288 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1293 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1295 ifmgd
->ap_capab
= capab_info
;
1297 kfree(ifmgd
->assocresp_ies
);
1298 ifmgd
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1299 ifmgd
->assocresp_ies
= kmalloc(ifmgd
->assocresp_ies_len
, GFP_KERNEL
);
1300 if (ifmgd
->assocresp_ies
)
1301 memcpy(ifmgd
->assocresp_ies
, pos
, ifmgd
->assocresp_ies_len
);
1305 /* Add STA entry for the AP */
1306 sta
= sta_info_get(local
, ifmgd
->bssid
);
1310 sta
= sta_info_alloc(sdata
, ifmgd
->bssid
, GFP_ATOMIC
);
1312 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1313 " the AP\n", sdata
->dev
->name
);
1318 /* update new sta with its last rx activity */
1319 sta
->last_rx
= jiffies
;
1323 * FIXME: Do we really need to update the sta_info's information here?
1324 * We already know about the AP (we found it in our list) so it
1325 * should already be filled with the right info, no?
1326 * As is stands, all this is racy because typically we assume
1327 * the information that is filled in here (except flags) doesn't
1328 * change while a STA structure is alive. As such, it should move
1329 * to between the sta_info_alloc() and sta_info_insert() above.
1332 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
1333 WLAN_STA_AUTHORIZED
);
1337 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1339 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1340 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1341 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1344 have_higher_than_11mbit
= true;
1346 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1347 if (sband
->bitrates
[j
].bitrate
== rate
) {
1350 basic_rates
|= BIT(j
);
1356 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1357 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1358 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1361 have_higher_than_11mbit
= true;
1363 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1364 if (sband
->bitrates
[j
].bitrate
== rate
) {
1367 basic_rates
|= BIT(j
);
1373 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1374 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1376 /* cf. IEEE 802.11 9.2.12 */
1377 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1378 have_higher_than_11mbit
)
1379 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1381 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1383 /* If TKIP/WEP is used, no need to parse AP's HT capabilities */
1384 if (elems
.ht_cap_elem
&& !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1385 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1386 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1388 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1390 rate_control_rate_init(sta
);
1392 if (ifmgd
->flags
& IEEE80211_STA_MFP_ENABLED
)
1393 set_sta_flags(sta
, WLAN_STA_MFP
);
1395 if (elems
.wmm_param
)
1396 set_sta_flags(sta
, WLAN_STA_WME
);
1399 int err
= sta_info_insert(sta
);
1401 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1402 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1410 if (elems
.wmm_param
)
1411 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1412 elems
.wmm_param_len
);
1414 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1415 (ifmgd
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
1416 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
))
1417 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1420 /* set AID and assoc capability,
1421 * ieee80211_set_associated() will tell the driver */
1422 bss_conf
->aid
= aid
;
1423 bss_conf
->assoc_capability
= capab_info
;
1424 ieee80211_set_associated(sdata
, changed
);
1427 * initialise the time of last beacon to be the association time,
1428 * otherwise beacon loss check will trigger immediately
1430 ifmgd
->last_beacon
= jiffies
;
1432 ieee80211_associated(sdata
);
1433 cfg80211_send_rx_assoc(sdata
->dev
, (u8
*) mgmt
, len
);
1437 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1438 struct ieee80211_mgmt
*mgmt
,
1440 struct ieee80211_rx_status
*rx_status
,
1441 struct ieee802_11_elems
*elems
,
1444 struct ieee80211_local
*local
= sdata
->local
;
1446 struct ieee80211_bss
*bss
;
1447 struct ieee80211_channel
*channel
;
1449 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1450 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1452 freq
= rx_status
->freq
;
1454 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1456 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1459 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1464 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1465 (memcmp(mgmt
->bssid
, sdata
->u
.mgd
.bssid
, ETH_ALEN
) == 0)) {
1466 struct ieee80211_channel_sw_ie
*sw_elem
=
1467 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1468 ieee80211_process_chanswitch(sdata
, sw_elem
, bss
);
1471 ieee80211_rx_bss_put(local
, bss
);
1475 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1476 struct ieee80211_mgmt
*mgmt
,
1478 struct ieee80211_rx_status
*rx_status
)
1480 struct ieee80211_if_managed
*ifmgd
;
1482 struct ieee802_11_elems elems
;
1484 ifmgd
= &sdata
->u
.mgd
;
1486 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1487 return; /* ignore ProbeResp to foreign address */
1489 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1493 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1496 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1498 /* direct probe may be part of the association flow */
1499 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
1501 printk(KERN_DEBUG
"%s direct probe responded\n",
1503 ieee80211_authenticate(sdata
);
1506 if (ifmgd
->flags
& IEEE80211_STA_PROBEREQ_POLL
)
1507 ifmgd
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1510 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1511 struct ieee80211_mgmt
*mgmt
,
1513 struct ieee80211_rx_status
*rx_status
)
1515 struct ieee80211_if_managed
*ifmgd
;
1517 struct ieee802_11_elems elems
;
1518 struct ieee80211_local
*local
= sdata
->local
;
1520 bool erp_valid
, directed_tim
;
1523 /* Process beacon from the current BSS */
1524 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1528 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
, &elems
);
1530 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, true);
1532 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1535 ifmgd
= &sdata
->u
.mgd
;
1537 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1538 memcmp(ifmgd
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1541 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1544 ieee80211_sta_wmm_params(local
, ifmgd
, elems
.wmm_param
,
1545 elems
.wmm_param_len
);
1547 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
) {
1548 directed_tim
= ieee80211_check_tim(&elems
, ifmgd
->aid
);
1551 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1552 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1553 ieee80211_hw_config(local
,
1554 IEEE80211_CONF_CHANGE_PS
);
1555 ieee80211_send_nullfunc(local
, sdata
, 0);
1557 local
->pspolling
= true;
1560 * Here is assumed that the driver will be
1561 * able to send ps-poll frame and receive a
1562 * response even though power save mode is
1563 * enabled, but some drivers might require
1564 * to disable power save here. This needs
1565 * to be investigated.
1567 ieee80211_send_pspoll(local
, sdata
);
1572 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1574 erp_value
= elems
.erp_info
[0];
1578 changed
|= ieee80211_handle_bss_capability(sdata
,
1579 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1580 erp_valid
, erp_value
);
1583 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1584 !(ifmgd
->flags
& IEEE80211_STA_TKIP_WEP_USED
)) {
1585 struct sta_info
*sta
;
1586 struct ieee80211_supported_band
*sband
;
1587 u16 ap_ht_cap_flags
;
1591 sta
= sta_info_get(local
, ifmgd
->bssid
);
1597 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1599 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1600 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1602 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1606 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1610 if (elems
.country_elem
) {
1611 /* Note we are only reviewing this on beacons
1612 * for the BSSID we are associated to */
1613 regulatory_hint_11d(local
->hw
.wiphy
,
1614 elems
.country_elem
, elems
.country_elem_len
);
1616 /* TODO: IBSS also needs this */
1617 if (elems
.pwr_constr_elem
)
1618 ieee80211_handle_pwr_constr(sdata
,
1619 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1620 elems
.pwr_constr_elem
,
1621 elems
.pwr_constr_elem_len
);
1624 ieee80211_bss_info_change_notify(sdata
, changed
);
1627 ieee80211_rx_result
ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
,
1628 struct sk_buff
*skb
,
1629 struct ieee80211_rx_status
*rx_status
)
1631 struct ieee80211_local
*local
= sdata
->local
;
1632 struct ieee80211_mgmt
*mgmt
;
1636 return RX_DROP_MONITOR
;
1638 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1639 fc
= le16_to_cpu(mgmt
->frame_control
);
1641 switch (fc
& IEEE80211_FCTL_STYPE
) {
1642 case IEEE80211_STYPE_PROBE_REQ
:
1643 case IEEE80211_STYPE_PROBE_RESP
:
1644 case IEEE80211_STYPE_BEACON
:
1645 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
1646 case IEEE80211_STYPE_AUTH
:
1647 case IEEE80211_STYPE_ASSOC_RESP
:
1648 case IEEE80211_STYPE_REASSOC_RESP
:
1649 case IEEE80211_STYPE_DEAUTH
:
1650 case IEEE80211_STYPE_DISASSOC
:
1651 skb_queue_tail(&sdata
->u
.mgd
.skb_queue
, skb
);
1652 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
1656 return RX_DROP_MONITOR
;
1659 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1660 struct sk_buff
*skb
)
1662 struct ieee80211_rx_status
*rx_status
;
1663 struct ieee80211_mgmt
*mgmt
;
1666 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1667 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1668 fc
= le16_to_cpu(mgmt
->frame_control
);
1670 switch (fc
& IEEE80211_FCTL_STYPE
) {
1671 case IEEE80211_STYPE_PROBE_RESP
:
1672 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
,
1675 case IEEE80211_STYPE_BEACON
:
1676 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
1679 case IEEE80211_STYPE_AUTH
:
1680 ieee80211_rx_mgmt_auth(sdata
, mgmt
, skb
->len
);
1682 case IEEE80211_STYPE_ASSOC_RESP
:
1683 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 0);
1685 case IEEE80211_STYPE_REASSOC_RESP
:
1686 ieee80211_rx_mgmt_assoc_resp(sdata
, mgmt
, skb
->len
, 1);
1688 case IEEE80211_STYPE_DEAUTH
:
1689 ieee80211_rx_mgmt_deauth(sdata
, mgmt
, skb
->len
);
1691 case IEEE80211_STYPE_DISASSOC
:
1692 ieee80211_rx_mgmt_disassoc(sdata
, mgmt
, skb
->len
);
1699 static void ieee80211_sta_timer(unsigned long data
)
1701 struct ieee80211_sub_if_data
*sdata
=
1702 (struct ieee80211_sub_if_data
*) data
;
1703 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1704 struct ieee80211_local
*local
= sdata
->local
;
1706 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
1707 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1710 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
)
1712 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1713 struct ieee80211_local
*local
= sdata
->local
;
1715 if (local
->ops
->reset_tsf
) {
1716 /* Reset own TSF to allow time synchronization work. */
1717 local
->ops
->reset_tsf(local_to_hw(local
));
1720 ifmgd
->wmm_last_param_set
= -1; /* allow any WMM update */
1723 if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1724 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
1725 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1726 ifmgd
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
1727 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1728 ifmgd
->auth_alg
= WLAN_AUTH_LEAP
;
1729 else if (ifmgd
->auth_algs
& IEEE80211_AUTH_ALG_FT
)
1730 ifmgd
->auth_alg
= WLAN_AUTH_FT
;
1732 ifmgd
->auth_alg
= WLAN_AUTH_OPEN
;
1733 ifmgd
->auth_transaction
= -1;
1734 ifmgd
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
1735 ifmgd
->assoc_scan_tries
= 0;
1736 ifmgd
->direct_probe_tries
= 0;
1737 ifmgd
->auth_tries
= 0;
1738 ifmgd
->assoc_tries
= 0;
1739 netif_tx_stop_all_queues(sdata
->dev
);
1740 netif_carrier_off(sdata
->dev
);
1743 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
)
1745 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1746 struct ieee80211_local
*local
= sdata
->local
;
1747 struct ieee80211_bss
*bss
;
1748 u8
*bssid
= ifmgd
->bssid
, *ssid
= ifmgd
->ssid
;
1749 u8 ssid_len
= ifmgd
->ssid_len
;
1750 u16 capa_mask
= WLAN_CAPABILITY_ESS
;
1751 u16 capa_val
= WLAN_CAPABILITY_ESS
;
1752 struct ieee80211_channel
*chan
= local
->oper_channel
;
1754 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) &&
1755 ifmgd
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
1756 IEEE80211_STA_AUTO_BSSID_SEL
|
1757 IEEE80211_STA_AUTO_CHANNEL_SEL
)) {
1758 capa_mask
|= WLAN_CAPABILITY_PRIVACY
;
1759 if (sdata
->default_key
)
1760 capa_val
|= WLAN_CAPABILITY_PRIVACY
;
1763 if (ifmgd
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
1766 if (ifmgd
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
1769 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) {
1774 bss
= (void *)cfg80211_get_bss(local
->hw
.wiphy
, chan
,
1775 bssid
, ssid
, ssid_len
,
1776 capa_mask
, capa_val
);
1779 ieee80211_set_freq(sdata
, bss
->cbss
.channel
->center_freq
);
1780 if (!(ifmgd
->flags
& IEEE80211_STA_SSID_SET
))
1781 ieee80211_sta_set_ssid(sdata
, bss
->ssid
,
1783 ieee80211_sta_set_bssid(sdata
, bss
->cbss
.bssid
);
1784 ieee80211_sta_def_wmm_params(sdata
, bss
->supp_rates_len
,
1786 if (sdata
->u
.mgd
.mfp
== IEEE80211_MFP_REQUIRED
)
1787 sdata
->u
.mgd
.flags
|= IEEE80211_STA_MFP_ENABLED
;
1789 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_MFP_ENABLED
;
1791 /* Send out direct probe if no probe resp was received or
1792 * the one we have is outdated
1794 if (!bss
->last_probe_resp
||
1795 time_after(jiffies
, bss
->last_probe_resp
1796 + IEEE80211_SCAN_RESULT_EXPIRE
))
1797 ifmgd
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1799 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
1801 ieee80211_rx_bss_put(local
, bss
);
1802 ieee80211_sta_reset_auth(sdata
);
1805 if (ifmgd
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
1806 ifmgd
->assoc_scan_tries
++;
1807 /* XXX maybe racy? */
1808 if (local
->scan_req
)
1810 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
1811 ifmgd
->ssid
, IEEE80211_MAX_SSID_LEN
);
1812 if (ifmgd
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
1813 local
->int_scan_req
.ssids
[0].ssid_len
= 0;
1815 local
->int_scan_req
.ssids
[0].ssid_len
= ifmgd
->ssid_len
;
1817 if (ieee80211_start_scan(sdata
, &local
->int_scan_req
))
1818 ieee80211_scan_failed(local
);
1820 ifmgd
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
1821 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
1823 ifmgd
->assoc_scan_tries
= 0;
1824 ifmgd
->state
= IEEE80211_STA_MLME_DISABLED
;
1831 static void ieee80211_sta_work(struct work_struct
*work
)
1833 struct ieee80211_sub_if_data
*sdata
=
1834 container_of(work
, struct ieee80211_sub_if_data
, u
.mgd
.work
);
1835 struct ieee80211_local
*local
= sdata
->local
;
1836 struct ieee80211_if_managed
*ifmgd
;
1837 struct sk_buff
*skb
;
1839 if (!netif_running(sdata
->dev
))
1842 if (local
->sw_scanning
|| local
->hw_scanning
)
1845 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1847 ifmgd
= &sdata
->u
.mgd
;
1849 while ((skb
= skb_dequeue(&ifmgd
->skb_queue
)))
1850 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1852 if (ifmgd
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
1853 ifmgd
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
1854 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
1855 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifmgd
->request
)) {
1857 * The call to ieee80211_start_scan can fail but ieee80211_request_scan
1858 * (which queued ieee80211_sta_work) did not return an error. Thus, call
1859 * ieee80211_scan_failed here if ieee80211_start_scan fails in order to
1860 * notify the scan requester.
1862 if (ieee80211_start_scan(sdata
, local
->scan_req
))
1863 ieee80211_scan_failed(local
);
1867 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
)) {
1868 if (ieee80211_sta_config_auth(sdata
))
1870 clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
1871 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
))
1874 switch (ifmgd
->state
) {
1875 case IEEE80211_STA_MLME_DISABLED
:
1877 case IEEE80211_STA_MLME_DIRECT_PROBE
:
1878 ieee80211_direct_probe(sdata
);
1880 case IEEE80211_STA_MLME_AUTHENTICATE
:
1881 ieee80211_authenticate(sdata
);
1883 case IEEE80211_STA_MLME_ASSOCIATE
:
1884 ieee80211_associate(sdata
);
1886 case IEEE80211_STA_MLME_ASSOCIATED
:
1887 ieee80211_associated(sdata
);
1894 if (ieee80211_privacy_mismatch(sdata
)) {
1895 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
1896 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
1898 ieee80211_set_disassoc(sdata
, false, true,
1899 WLAN_REASON_UNSPECIFIED
);
1903 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
1905 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
1906 queue_work(sdata
->local
->hw
.workqueue
,
1907 &sdata
->u
.mgd
.work
);
1910 /* interface setup */
1911 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
1913 struct ieee80211_if_managed
*ifmgd
;
1915 ifmgd
= &sdata
->u
.mgd
;
1916 INIT_WORK(&ifmgd
->work
, ieee80211_sta_work
);
1917 INIT_WORK(&ifmgd
->chswitch_work
, ieee80211_chswitch_work
);
1918 INIT_WORK(&ifmgd
->beacon_loss_work
, ieee80211_beacon_loss_work
);
1919 setup_timer(&ifmgd
->timer
, ieee80211_sta_timer
,
1920 (unsigned long) sdata
);
1921 setup_timer(&ifmgd
->chswitch_timer
, ieee80211_chswitch_timer
,
1922 (unsigned long) sdata
);
1923 skb_queue_head_init(&ifmgd
->skb_queue
);
1925 ifmgd
->capab
= WLAN_CAPABILITY_ESS
;
1926 ifmgd
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
1927 IEEE80211_AUTH_ALG_SHARED_KEY
;
1928 ifmgd
->flags
|= IEEE80211_STA_CREATE_IBSS
|
1929 IEEE80211_STA_AUTO_BSSID_SEL
|
1930 IEEE80211_STA_AUTO_CHANNEL_SEL
;
1931 if (sdata
->local
->hw
.queues
>= 4)
1932 ifmgd
->flags
|= IEEE80211_STA_WMM_ENABLED
;
1935 /* configuration hooks */
1936 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
)
1938 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1939 struct ieee80211_local
*local
= sdata
->local
;
1941 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
1944 if ((ifmgd
->flags
& (IEEE80211_STA_BSSID_SET
|
1945 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
1946 (ifmgd
->flags
& (IEEE80211_STA_SSID_SET
|
1947 IEEE80211_STA_AUTO_SSID_SEL
))) {
1949 if (ifmgd
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
1950 ieee80211_set_disassoc(sdata
, true, true,
1951 WLAN_REASON_DEAUTH_LEAVING
);
1953 if (!(ifmgd
->flags
& IEEE80211_STA_EXT_SME
) ||
1954 ifmgd
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1955 set_bit(IEEE80211_STA_REQ_AUTH
, &ifmgd
->request
);
1956 else if (ifmgd
->flags
& IEEE80211_STA_EXT_SME
)
1957 set_bit(IEEE80211_STA_REQ_RUN
, &ifmgd
->request
);
1958 queue_work(local
->hw
.workqueue
, &ifmgd
->work
);
1962 int ieee80211_sta_commit(struct ieee80211_sub_if_data
*sdata
)
1964 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1966 if (ifmgd
->ssid_len
)
1967 ifmgd
->flags
|= IEEE80211_STA_SSID_SET
;
1969 ifmgd
->flags
&= ~IEEE80211_STA_SSID_SET
;
1974 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
1976 struct ieee80211_if_managed
*ifmgd
;
1978 if (len
> IEEE80211_MAX_SSID_LEN
)
1981 ifmgd
= &sdata
->u
.mgd
;
1983 if (ifmgd
->ssid_len
!= len
|| memcmp(ifmgd
->ssid
, ssid
, len
) != 0) {
1985 * Do not use reassociation if SSID is changed (different ESS).
1987 ifmgd
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1988 memset(ifmgd
->ssid
, 0, sizeof(ifmgd
->ssid
));
1989 memcpy(ifmgd
->ssid
, ssid
, len
);
1990 ifmgd
->ssid_len
= len
;
1993 return ieee80211_sta_commit(sdata
);
1996 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
1998 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
1999 memcpy(ssid
, ifmgd
->ssid
, ifmgd
->ssid_len
);
2000 *len
= ifmgd
->ssid_len
;
2004 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2006 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2008 if (is_valid_ether_addr(bssid
)) {
2009 memcpy(ifmgd
->bssid
, bssid
, ETH_ALEN
);
2010 ifmgd
->flags
|= IEEE80211_STA_BSSID_SET
;
2012 memset(ifmgd
->bssid
, 0, ETH_ALEN
);
2013 ifmgd
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2016 if (netif_running(sdata
->dev
)) {
2017 if (ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
)) {
2018 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2019 "the low-level driver\n", sdata
->dev
->name
);
2023 return ieee80211_sta_commit(sdata
);
2026 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
,
2027 const char *ie
, size_t len
)
2029 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2031 kfree(ifmgd
->extra_ie
);
2033 ifmgd
->extra_ie
= NULL
;
2034 ifmgd
->extra_ie_len
= 0;
2037 ifmgd
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2038 if (!ifmgd
->extra_ie
) {
2039 ifmgd
->extra_ie_len
= 0;
2042 memcpy(ifmgd
->extra_ie
, ie
, len
);
2043 ifmgd
->extra_ie_len
= len
;
2047 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2049 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2050 sdata
->dev
->name
, reason
);
2052 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2055 ieee80211_set_disassoc(sdata
, true, true, reason
);
2059 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2061 struct ieee80211_if_managed
*ifmgd
= &sdata
->u
.mgd
;
2063 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2064 sdata
->dev
->name
, reason
);
2066 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2069 if (!(ifmgd
->flags
& IEEE80211_STA_ASSOCIATED
))
2072 ieee80211_set_disassoc(sdata
, false, true, reason
);
2076 /* scan finished notification */
2077 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2079 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2081 /* Restart STA timers */
2083 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2084 ieee80211_restart_sta_timer(sdata
);
2088 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
2090 struct ieee80211_local
*local
=
2091 container_of(work
, struct ieee80211_local
,
2092 dynamic_ps_disable_work
);
2094 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2095 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2096 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2099 ieee80211_wake_queues_by_reason(&local
->hw
,
2100 IEEE80211_QUEUE_STOP_REASON_PS
);
2103 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
2105 struct ieee80211_local
*local
=
2106 container_of(work
, struct ieee80211_local
,
2107 dynamic_ps_enable_work
);
2108 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2110 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
2113 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2114 ieee80211_send_nullfunc(local
, sdata
, 1);
2116 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
2117 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2120 void ieee80211_dynamic_ps_timer(unsigned long data
)
2122 struct ieee80211_local
*local
= (void *) data
;
2124 queue_work(local
->hw
.workqueue
, &local
->dynamic_ps_enable_work
);
2127 void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
2128 struct ieee80211_sub_if_data
*sdata
,
2131 struct sk_buff
*skb
;
2132 struct ieee80211_hdr
*nullfunc
;
2135 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
))
2138 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
2140 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
2141 "frame\n", sdata
->dev
->name
);
2144 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2146 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
2147 memset(nullfunc
, 0, 24);
2148 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
2149 IEEE80211_FCTL_TODS
);
2151 fc
|= cpu_to_le16(IEEE80211_FCTL_PM
);
2152 nullfunc
->frame_control
= fc
;
2153 memcpy(nullfunc
->addr1
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2154 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
2155 memcpy(nullfunc
->addr3
, sdata
->u
.mgd
.bssid
, ETH_ALEN
);
2157 ieee80211_tx_skb(sdata
, skb
, 0);