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/wireless.h>
19 #include <linux/random.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rtnetlink.h>
22 #include <net/iw_handler.h>
23 #include <net/mac80211.h>
24 #include <asm/unaligned.h>
26 #include "ieee80211_i.h"
30 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
31 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
32 #define IEEE80211_AUTH_MAX_TRIES 3
33 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
34 #define IEEE80211_ASSOC_MAX_TRIES 3
35 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
36 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
37 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
38 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
39 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
40 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
42 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
43 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
45 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
49 static int ecw2cw(int ecw
)
51 return (1 << ecw
) - 1;
54 static u8
*ieee80211_bss_get_ie(struct ieee80211_bss
*bss
, u8 ie
)
61 end
= pos
+ bss
->ies_len
;
63 while (pos
+ 1 < end
) {
64 if (pos
+ 2 + pos
[1] > end
)
74 static int ieee80211_compatible_rates(struct ieee80211_bss
*bss
,
75 struct ieee80211_supported_band
*sband
,
81 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
82 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
84 for (j
= 0; j
< sband
->n_bitrates
; j
++)
85 if (sband
->bitrates
[j
].bitrate
== rate
) {
95 /* also used by mesh code */
96 u32
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
97 struct ieee802_11_elems
*elems
,
98 enum ieee80211_band band
)
100 struct ieee80211_supported_band
*sband
;
101 struct ieee80211_rate
*bitrates
;
105 sband
= local
->hw
.wiphy
->bands
[band
];
109 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
112 bitrates
= sband
->bitrates
;
113 num_rates
= sband
->n_bitrates
;
115 for (i
= 0; i
< elems
->supp_rates_len
+
116 elems
->ext_supp_rates_len
; i
++) {
119 if (i
< elems
->supp_rates_len
)
120 rate
= elems
->supp_rates
[i
];
121 else if (elems
->ext_supp_rates
)
122 rate
= elems
->ext_supp_rates
123 [i
- elems
->supp_rates_len
];
124 own_rate
= 5 * (rate
& 0x7f);
125 for (j
= 0; j
< num_rates
; j
++)
126 if (bitrates
[j
].bitrate
== own_rate
)
127 supp_rates
|= BIT(j
);
132 /* frame sending functions */
134 static void add_extra_ies(struct sk_buff
*skb
, u8
*ies
, size_t ies_len
)
137 memcpy(skb_put(skb
, ies_len
), ies
, ies_len
);
140 /* also used by scanning code */
141 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
142 u8
*ssid
, size_t ssid_len
)
144 struct ieee80211_local
*local
= sdata
->local
;
145 struct ieee80211_supported_band
*sband
;
147 struct ieee80211_mgmt
*mgmt
;
148 u8
*pos
, *supp_rates
, *esupp_rates
= NULL
;
151 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
) + 200 +
152 sdata
->u
.sta
.ie_probereq_len
);
154 printk(KERN_DEBUG
"%s: failed to allocate buffer for probe "
155 "request\n", sdata
->dev
->name
);
158 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
160 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
162 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
163 IEEE80211_STYPE_PROBE_REQ
);
164 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
166 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
167 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
169 memset(mgmt
->da
, 0xff, ETH_ALEN
);
170 memset(mgmt
->bssid
, 0xff, ETH_ALEN
);
172 pos
= skb_put(skb
, 2 + ssid_len
);
173 *pos
++ = WLAN_EID_SSID
;
175 memcpy(pos
, ssid
, ssid_len
);
177 supp_rates
= skb_put(skb
, 2);
178 supp_rates
[0] = WLAN_EID_SUPP_RATES
;
180 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
182 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
183 struct ieee80211_rate
*rate
= &sband
->bitrates
[i
];
185 pos
= skb_put(skb
, 1);
187 } else if (supp_rates
[1] == 8) {
188 esupp_rates
= skb_put(skb
, 3);
189 esupp_rates
[0] = WLAN_EID_EXT_SUPP_RATES
;
191 pos
= &esupp_rates
[2];
193 pos
= skb_put(skb
, 1);
196 *pos
= rate
->bitrate
/ 5;
199 add_extra_ies(skb
, sdata
->u
.sta
.ie_probereq
,
200 sdata
->u
.sta
.ie_probereq_len
);
202 ieee80211_tx_skb(sdata
, skb
, 0);
205 static void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
206 struct ieee80211_if_sta
*ifsta
,
207 int transaction
, u8
*extra
, size_t extra_len
,
210 struct ieee80211_local
*local
= sdata
->local
;
212 struct ieee80211_mgmt
*mgmt
;
214 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
215 sizeof(*mgmt
) + 6 + extra_len
+
216 sdata
->u
.sta
.ie_auth_len
);
218 printk(KERN_DEBUG
"%s: failed to allocate buffer for auth "
219 "frame\n", sdata
->dev
->name
);
222 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
224 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
225 memset(mgmt
, 0, 24 + 6);
226 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
227 IEEE80211_STYPE_AUTH
);
229 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
230 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
231 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
232 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
233 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(ifsta
->auth_alg
);
234 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
235 ifsta
->auth_transaction
= transaction
+ 1;
236 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
238 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
239 add_extra_ies(skb
, sdata
->u
.sta
.ie_auth
, sdata
->u
.sta
.ie_auth_len
);
241 ieee80211_tx_skb(sdata
, skb
, encrypt
);
244 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
,
245 struct ieee80211_if_sta
*ifsta
)
247 struct ieee80211_local
*local
= sdata
->local
;
249 struct ieee80211_mgmt
*mgmt
;
250 u8
*pos
, *ies
, *ht_ie
, *e_ies
;
251 int i
, len
, count
, rates_len
, supp_rates_len
;
253 struct ieee80211_bss
*bss
;
255 struct ieee80211_supported_band
*sband
;
259 if (ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
260 e_ies
= sdata
->u
.sta
.ie_reassocreq
;
261 e_ies_len
= sdata
->u
.sta
.ie_reassocreq_len
;
263 e_ies
= sdata
->u
.sta
.ie_assocreq
;
264 e_ies_len
= sdata
->u
.sta
.ie_assocreq_len
;
267 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
268 sizeof(*mgmt
) + 200 + ifsta
->extra_ie_len
+
269 ifsta
->ssid_len
+ e_ies_len
);
271 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
272 "frame\n", sdata
->dev
->name
);
275 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
277 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
279 capab
= ifsta
->capab
;
281 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
282 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
283 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
284 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
285 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
288 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
289 local
->hw
.conf
.channel
->center_freq
,
290 ifsta
->ssid
, ifsta
->ssid_len
);
292 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
293 capab
|= WLAN_CAPABILITY_PRIVACY
;
297 /* get all rates supported by the device and the AP as
298 * some APs don't like getting a superset of their rates
299 * in the association request (e.g. D-Link DAP 1353 in
301 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
303 if ((bss
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
304 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
305 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
307 ieee80211_rx_bss_put(local
, bss
);
310 rates_len
= sband
->n_bitrates
;
313 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
315 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
316 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
317 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
319 if (ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
321 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
322 IEEE80211_STYPE_REASSOC_REQ
);
323 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
324 mgmt
->u
.reassoc_req
.listen_interval
=
325 cpu_to_le16(local
->hw
.conf
.listen_interval
);
326 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifsta
->prev_bssid
,
330 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
331 IEEE80211_STYPE_ASSOC_REQ
);
332 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
333 mgmt
->u
.assoc_req
.listen_interval
=
334 cpu_to_le16(local
->hw
.conf
.listen_interval
);
338 ies
= pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
339 *pos
++ = WLAN_EID_SSID
;
340 *pos
++ = ifsta
->ssid_len
;
341 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
343 /* add all rates which were marked to be used above */
344 supp_rates_len
= rates_len
;
345 if (supp_rates_len
> 8)
348 len
= sband
->n_bitrates
;
349 pos
= skb_put(skb
, supp_rates_len
+ 2);
350 *pos
++ = WLAN_EID_SUPP_RATES
;
351 *pos
++ = supp_rates_len
;
354 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
355 if (BIT(i
) & rates
) {
356 int rate
= sband
->bitrates
[i
].bitrate
;
357 *pos
++ = (u8
) (rate
/ 5);
363 if (rates_len
> count
) {
364 pos
= skb_put(skb
, rates_len
- count
+ 2);
365 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
366 *pos
++ = rates_len
- count
;
368 for (i
++; i
< sband
->n_bitrates
; i
++) {
369 if (BIT(i
) & rates
) {
370 int rate
= sband
->bitrates
[i
].bitrate
;
371 *pos
++ = (u8
) (rate
/ 5);
376 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
377 /* 1. power capabilities */
378 pos
= skb_put(skb
, 4);
379 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
381 *pos
++ = 0; /* min tx power */
382 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
384 /* 2. supported channels */
385 /* TODO: get this in reg domain format */
386 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
387 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
388 *pos
++ = 2 * sband
->n_channels
;
389 for (i
= 0; i
< sband
->n_channels
; i
++) {
390 *pos
++ = ieee80211_frequency_to_channel(
391 sband
->channels
[i
].center_freq
);
392 *pos
++ = 1; /* one channel in the subband*/
396 if (ifsta
->extra_ie
) {
397 pos
= skb_put(skb
, ifsta
->extra_ie_len
);
398 memcpy(pos
, ifsta
->extra_ie
, ifsta
->extra_ie_len
);
401 if (wmm
&& (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
402 pos
= skb_put(skb
, 9);
403 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
404 *pos
++ = 7; /* len */
405 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
408 *pos
++ = 2; /* WME */
409 *pos
++ = 0; /* WME info */
410 *pos
++ = 1; /* WME ver */
414 /* wmm support is a must to HT */
416 * IEEE802.11n does not allow TKIP/WEP as pairwise
417 * ciphers in HT mode. We still associate in non-ht
418 * mode (11a/b/g) if any one of these ciphers is
419 * configured as pairwise.
421 if (wmm
&& (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
422 sband
->ht_cap
.ht_supported
&&
423 (ht_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_INFORMATION
)) &&
424 ht_ie
[1] >= sizeof(struct ieee80211_ht_info
) &&
425 (!(ifsta
->flags
& IEEE80211_STA_TKIP_WEP_USED
))) {
426 struct ieee80211_ht_info
*ht_info
=
427 (struct ieee80211_ht_info
*)(ht_ie
+ 2);
428 u16 cap
= sband
->ht_cap
.cap
;
430 u32 flags
= local
->hw
.conf
.channel
->flags
;
432 switch (ht_info
->ht_param
& IEEE80211_HT_PARAM_CHA_SEC_OFFSET
) {
433 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE
:
434 if (flags
& IEEE80211_CHAN_NO_FAT_ABOVE
) {
435 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
436 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
439 case IEEE80211_HT_PARAM_CHA_SEC_BELOW
:
440 if (flags
& IEEE80211_CHAN_NO_FAT_BELOW
) {
441 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
442 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
447 tmp
= cpu_to_le16(cap
);
448 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
449 *pos
++ = WLAN_EID_HT_CAPABILITY
;
450 *pos
++ = sizeof(struct ieee80211_ht_cap
);
451 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
452 memcpy(pos
, &tmp
, sizeof(u16
));
454 /* TODO: needs a define here for << 2 */
455 *pos
++ = sband
->ht_cap
.ampdu_factor
|
456 (sband
->ht_cap
.ampdu_density
<< 2);
457 memcpy(pos
, &sband
->ht_cap
.mcs
, sizeof(sband
->ht_cap
.mcs
));
460 add_extra_ies(skb
, e_ies
, e_ies_len
);
462 kfree(ifsta
->assocreq_ies
);
463 ifsta
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
464 ifsta
->assocreq_ies
= kmalloc(ifsta
->assocreq_ies_len
, GFP_KERNEL
);
465 if (ifsta
->assocreq_ies
)
466 memcpy(ifsta
->assocreq_ies
, ies
, ifsta
->assocreq_ies_len
);
468 ieee80211_tx_skb(sdata
, skb
, 0);
472 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
473 u16 stype
, u16 reason
)
475 struct ieee80211_local
*local
= sdata
->local
;
476 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
478 struct ieee80211_mgmt
*mgmt
;
482 if (stype
== IEEE80211_STYPE_DEAUTH
) {
483 ies
= sdata
->u
.sta
.ie_deauth
;
484 ies_len
= sdata
->u
.sta
.ie_deauth_len
;
486 ies
= sdata
->u
.sta
.ie_disassoc
;
487 ies_len
= sdata
->u
.sta
.ie_disassoc_len
;
490 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
) +
493 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
494 "deauth/disassoc frame\n", sdata
->dev
->name
);
497 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
499 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
501 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
502 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
503 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
504 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
506 /* u.deauth.reason_code == u.disassoc.reason_code */
507 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
509 add_extra_ies(skb
, ies
, ies_len
);
511 ieee80211_tx_skb(sdata
, skb
, ifsta
->flags
& IEEE80211_STA_MFP_ENABLED
);
514 void ieee80211_send_pspoll(struct ieee80211_local
*local
,
515 struct ieee80211_sub_if_data
*sdata
)
517 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
518 struct ieee80211_pspoll
*pspoll
;
522 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*pspoll
));
524 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
525 "pspoll frame\n", sdata
->dev
->name
);
528 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
530 pspoll
= (struct ieee80211_pspoll
*) skb_put(skb
, sizeof(*pspoll
));
531 memset(pspoll
, 0, sizeof(*pspoll
));
532 fc
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_PSPOLL
| IEEE80211_FCTL_PM
;
533 pspoll
->frame_control
= cpu_to_le16(fc
);
534 pspoll
->aid
= cpu_to_le16(ifsta
->aid
);
536 /* aid in PS-Poll has its two MSBs each set to 1 */
537 pspoll
->aid
|= cpu_to_le16(1 << 15 | 1 << 14);
539 memcpy(pspoll
->bssid
, ifsta
->bssid
, ETH_ALEN
);
540 memcpy(pspoll
->ta
, sdata
->dev
->dev_addr
, ETH_ALEN
);
542 ieee80211_tx_skb(sdata
, skb
, 0);
548 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
549 struct ieee80211_bss
*bss
)
551 struct ieee80211_local
*local
= sdata
->local
;
552 int i
, have_higher_than_11mbit
= 0;
554 /* cf. IEEE 802.11 9.2.12 */
555 for (i
= 0; i
< bss
->supp_rates_len
; i
++)
556 if ((bss
->supp_rates
[i
] & 0x7f) * 5 > 110)
557 have_higher_than_11mbit
= 1;
559 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
560 have_higher_than_11mbit
)
561 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
563 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
565 ieee80211_set_wmm_default(sdata
);
568 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
569 struct ieee80211_if_sta
*ifsta
,
570 u8
*wmm_param
, size_t wmm_param_len
)
572 struct ieee80211_tx_queue_params params
;
577 if (!(ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
))
583 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
585 count
= wmm_param
[6] & 0x0f;
586 if (count
== ifsta
->wmm_last_param_set
)
588 ifsta
->wmm_last_param_set
= count
;
591 left
= wmm_param_len
- 8;
593 memset(¶ms
, 0, sizeof(params
));
595 if (!local
->ops
->conf_tx
)
599 for (; left
>= 4; left
-= 4, pos
+= 4) {
600 int aci
= (pos
[0] >> 5) & 0x03;
601 int acm
= (pos
[0] >> 4) & 0x01;
608 local
->wmm_acm
|= BIT(0) | BIT(3);
613 local
->wmm_acm
|= BIT(4) | BIT(5);
618 local
->wmm_acm
|= BIT(6) | BIT(7);
624 local
->wmm_acm
|= BIT(1) | BIT(2);
628 params
.aifs
= pos
[0] & 0x0f;
629 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
630 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
631 params
.txop
= get_unaligned_le16(pos
+ 2);
632 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
633 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
634 "cWmin=%d cWmax=%d txop=%d\n",
635 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
636 params
.cw_max
, params
.txop
);
638 /* TODO: handle ACM (block TX, fallback to next lowest allowed
640 if (local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
641 printk(KERN_DEBUG
"%s: failed to set TX queue "
642 "parameters for queue %d\n", local
->mdev
->name
, queue
);
647 static bool ieee80211_check_tim(struct ieee802_11_elems
*elems
, u16 aid
)
650 u8 index
, indexn1
, indexn2
;
651 struct ieee80211_tim_ie
*tim
= (struct ieee80211_tim_ie
*) elems
->tim
;
655 mask
= 1 << (aid
& 7);
657 indexn1
= tim
->bitmap_ctrl
& 0xfe;
658 indexn2
= elems
->tim_len
+ indexn1
- 4;
660 if (index
< indexn1
|| index
> indexn2
)
665 return !!(tim
->virtual_map
[index
] & mask
);
668 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
669 u16 capab
, bool erp_valid
, u8 erp
)
671 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
672 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
673 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
677 bool use_short_preamble
;
681 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
682 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
684 use_protection
= false;
685 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
688 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
690 if (use_protection
!= bss_conf
->use_cts_prot
) {
691 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
692 if (net_ratelimit()) {
693 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID=%pM)\n",
695 use_protection
? "enabled" : "disabled",
699 bss_conf
->use_cts_prot
= use_protection
;
700 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
703 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
704 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
705 if (net_ratelimit()) {
706 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
709 use_short_preamble
? "short" : "long",
713 bss_conf
->use_short_preamble
= use_short_preamble
;
714 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
717 if (use_short_slot
!= bss_conf
->use_short_slot
) {
718 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
719 if (net_ratelimit()) {
720 printk(KERN_DEBUG
"%s: switched to %s slot time"
723 use_short_slot
? "short" : "long",
727 bss_conf
->use_short_slot
= use_short_slot
;
728 changed
|= BSS_CHANGED_ERP_SLOT
;
734 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
,
735 struct ieee80211_if_sta
*ifsta
)
737 union iwreq_data wrqu
;
738 memset(&wrqu
, 0, sizeof(wrqu
));
739 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
740 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
741 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
742 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
745 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
,
746 struct ieee80211_if_sta
*ifsta
)
751 union iwreq_data wrqu
;
753 if (!ifsta
->assocreq_ies
&& !ifsta
->assocresp_ies
)
756 buf
= kmalloc(50 + 2 * (ifsta
->assocreq_ies_len
+
757 ifsta
->assocresp_ies_len
), GFP_KERNEL
);
761 len
= sprintf(buf
, "ASSOCINFO(");
762 if (ifsta
->assocreq_ies
) {
763 len
+= sprintf(buf
+ len
, "ReqIEs=");
764 for (i
= 0; i
< ifsta
->assocreq_ies_len
; i
++) {
765 len
+= sprintf(buf
+ len
, "%02x",
766 ifsta
->assocreq_ies
[i
]);
769 if (ifsta
->assocresp_ies
) {
770 if (ifsta
->assocreq_ies
)
771 len
+= sprintf(buf
+ len
, " ");
772 len
+= sprintf(buf
+ len
, "RespIEs=");
773 for (i
= 0; i
< ifsta
->assocresp_ies_len
; i
++) {
774 len
+= sprintf(buf
+ len
, "%02x",
775 ifsta
->assocresp_ies
[i
]);
778 len
+= sprintf(buf
+ len
, ")");
780 if (len
> IW_CUSTOM_MAX
) {
781 len
= sprintf(buf
, "ASSOCRESPIE=");
782 for (i
= 0; i
< ifsta
->assocresp_ies_len
; i
++) {
783 len
+= sprintf(buf
+ len
, "%02x",
784 ifsta
->assocresp_ies
[i
]);
788 if (len
<= IW_CUSTOM_MAX
) {
789 memset(&wrqu
, 0, sizeof(wrqu
));
790 wrqu
.data
.length
= len
;
791 wireless_send_event(sdata
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
798 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
799 struct ieee80211_if_sta
*ifsta
,
800 u32 bss_info_changed
)
802 struct ieee80211_local
*local
= sdata
->local
;
803 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
805 struct ieee80211_bss
*bss
;
807 bss_info_changed
|= BSS_CHANGED_ASSOC
;
808 ifsta
->flags
|= IEEE80211_STA_ASSOCIATED
;
810 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
813 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
814 conf
->channel
->center_freq
,
815 ifsta
->ssid
, ifsta
->ssid_len
);
817 /* set timing information */
818 sdata
->vif
.bss_conf
.beacon_int
= bss
->beacon_int
;
819 sdata
->vif
.bss_conf
.timestamp
= bss
->timestamp
;
820 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
822 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
823 bss
->capability
, bss
->has_erp_value
, bss
->erp_value
);
825 ieee80211_rx_bss_put(local
, bss
);
828 ifsta
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
829 memcpy(ifsta
->prev_bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
830 ieee80211_sta_send_associnfo(sdata
, ifsta
);
832 ifsta
->last_probe
= jiffies
;
833 ieee80211_led_assoc(local
, 1);
835 sdata
->vif
.bss_conf
.assoc
= 1;
837 * For now just always ask the driver to update the basic rateset
838 * when we have associated, we aren't checking whether it actually
841 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
842 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
844 if (local
->powersave
) {
845 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
) &&
846 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
847 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
849 local
->hw
.conf
.dynamic_ps_timeout
));
851 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
852 ieee80211_send_nullfunc(local
, sdata
, 1);
853 conf
->flags
|= IEEE80211_CONF_PS
;
854 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
858 netif_tx_start_all_queues(sdata
->dev
);
859 netif_carrier_on(sdata
->dev
);
861 ieee80211_sta_send_apinfo(sdata
, ifsta
);
864 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
,
865 struct ieee80211_if_sta
*ifsta
)
867 ifsta
->direct_probe_tries
++;
868 if (ifsta
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
869 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
870 sdata
->dev
->name
, ifsta
->bssid
);
871 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
872 ieee80211_sta_send_apinfo(sdata
, ifsta
);
875 * Most likely AP is not in the range so remove the
876 * bss information associated to the AP
878 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
879 sdata
->local
->hw
.conf
.channel
->center_freq
,
880 ifsta
->ssid
, ifsta
->ssid_len
);
884 printk(KERN_DEBUG
"%s: direct probe to AP %pM try %d\n",
885 sdata
->dev
->name
, ifsta
->bssid
,
886 ifsta
->direct_probe_tries
);
888 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
890 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifsta
->request
);
892 /* Direct probe is sent to broadcast address as some APs
893 * will not answer to direct packet in unassociated state.
895 ieee80211_send_probe_req(sdata
, NULL
,
896 ifsta
->ssid
, ifsta
->ssid_len
);
898 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
902 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
,
903 struct ieee80211_if_sta
*ifsta
)
906 if (ifsta
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
907 printk(KERN_DEBUG
"%s: authentication with AP %pM"
909 sdata
->dev
->name
, ifsta
->bssid
);
910 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
911 ieee80211_sta_send_apinfo(sdata
, ifsta
);
912 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
913 sdata
->local
->hw
.conf
.channel
->center_freq
,
914 ifsta
->ssid
, ifsta
->ssid_len
);
918 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
919 printk(KERN_DEBUG
"%s: authenticate with AP %pM\n",
920 sdata
->dev
->name
, ifsta
->bssid
);
922 ieee80211_send_auth(sdata
, ifsta
, 1, NULL
, 0, 0);
924 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
928 * The disassoc 'reason' argument can be either our own reason
929 * if self disconnected or a reason code from the AP.
931 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
932 struct ieee80211_if_sta
*ifsta
, bool deauth
,
933 bool self_disconnected
, u16 reason
)
935 struct ieee80211_local
*local
= sdata
->local
;
936 struct sta_info
*sta
;
937 u32 changed
= 0, config_changed
= 0;
941 sta
= sta_info_get(local
, ifsta
->bssid
);
948 ifsta
->direct_probe_tries
= 0;
949 ifsta
->auth_tries
= 0;
951 ifsta
->assoc_scan_tries
= 0;
952 ifsta
->assoc_tries
= 0;
954 netif_tx_stop_all_queues(sdata
->dev
);
955 netif_carrier_off(sdata
->dev
);
957 ieee80211_sta_tear_down_BA_sessions(sta
);
959 if (self_disconnected
) {
961 ieee80211_send_deauth_disassoc(sdata
,
962 IEEE80211_STYPE_DEAUTH
, reason
);
964 ieee80211_send_deauth_disassoc(sdata
,
965 IEEE80211_STYPE_DISASSOC
, reason
);
968 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
969 changed
|= ieee80211_reset_erp_info(sdata
);
971 ieee80211_led_assoc(local
, 0);
972 changed
|= BSS_CHANGED_ASSOC
;
973 sdata
->vif
.bss_conf
.assoc
= false;
975 ieee80211_sta_send_apinfo(sdata
, ifsta
);
977 if (self_disconnected
|| reason
== WLAN_REASON_DISASSOC_STA_HAS_LEFT
) {
978 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
979 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
980 sdata
->local
->hw
.conf
.channel
->center_freq
,
981 ifsta
->ssid
, ifsta
->ssid_len
);
986 /* channel(_type) changes are handled by ieee80211_hw_config */
987 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
989 local
->power_constr_level
= 0;
991 del_timer_sync(&local
->dynamic_ps_timer
);
992 cancel_work_sync(&local
->dynamic_ps_enable_work
);
994 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
995 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
996 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
999 ieee80211_hw_config(local
, config_changed
);
1000 ieee80211_bss_info_change_notify(sdata
, changed
);
1004 sta
= sta_info_get(local
, ifsta
->bssid
);
1010 sta_info_unlink(&sta
);
1014 sta_info_destroy(sta
);
1017 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
1019 if (!sdata
|| !sdata
->default_key
||
1020 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
1025 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
,
1026 struct ieee80211_if_sta
*ifsta
)
1028 struct ieee80211_local
*local
= sdata
->local
;
1029 struct ieee80211_bss
*bss
;
1032 int privacy_invoked
;
1034 if (!ifsta
|| (ifsta
->flags
& IEEE80211_STA_MIXED_CELL
))
1037 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
1038 local
->hw
.conf
.channel
->center_freq
,
1039 ifsta
->ssid
, ifsta
->ssid_len
);
1043 bss_privacy
= !!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
);
1044 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
1045 privacy_invoked
= !!(ifsta
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
1047 ieee80211_rx_bss_put(local
, bss
);
1049 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
1055 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
,
1056 struct ieee80211_if_sta
*ifsta
)
1058 ifsta
->assoc_tries
++;
1059 if (ifsta
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1060 printk(KERN_DEBUG
"%s: association with AP %pM"
1062 sdata
->dev
->name
, ifsta
->bssid
);
1063 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
1064 ieee80211_sta_send_apinfo(sdata
, ifsta
);
1065 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
1066 sdata
->local
->hw
.conf
.channel
->center_freq
,
1067 ifsta
->ssid
, ifsta
->ssid_len
);
1071 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1072 printk(KERN_DEBUG
"%s: associate with AP %pM\n",
1073 sdata
->dev
->name
, ifsta
->bssid
);
1074 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
1075 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
1076 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
1077 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
1081 ieee80211_send_assoc(sdata
, ifsta
);
1083 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
1087 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
,
1088 struct ieee80211_if_sta
*ifsta
)
1090 struct ieee80211_local
*local
= sdata
->local
;
1091 struct sta_info
*sta
;
1094 /* TODO: start monitoring current AP signal quality and number of
1095 * missed beacons. Scan other channels every now and then and search
1096 * for better APs. */
1097 /* TODO: remove expired BSSes */
1099 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
1103 sta
= sta_info_get(local
, ifsta
->bssid
);
1105 printk(KERN_DEBUG
"%s: No STA entry for own AP %pM\n",
1106 sdata
->dev
->name
, ifsta
->bssid
);
1110 if (time_after(jiffies
,
1111 sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
1112 if (ifsta
->flags
& IEEE80211_STA_PROBEREQ_POLL
) {
1113 printk(KERN_DEBUG
"%s: No ProbeResp from "
1114 "current AP %pM - assume out of "
1116 sdata
->dev
->name
, ifsta
->bssid
);
1119 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
1122 ifsta
->flags
^= IEEE80211_STA_PROBEREQ_POLL
;
1124 ifsta
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1125 if (time_after(jiffies
, ifsta
->last_probe
+
1126 IEEE80211_PROBE_INTERVAL
)) {
1127 ifsta
->last_probe
= jiffies
;
1128 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
1138 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
1139 WLAN_REASON_PREV_AUTH_NOT_VALID
);
1141 mod_timer(&ifsta
->timer
, jiffies
+
1142 IEEE80211_MONITORING_INTERVAL
);
1146 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
,
1147 struct ieee80211_if_sta
*ifsta
)
1149 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1150 ifsta
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1151 ieee80211_associate(sdata
, ifsta
);
1155 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1156 struct ieee80211_if_sta
*ifsta
,
1157 struct ieee80211_mgmt
*mgmt
,
1161 struct ieee802_11_elems elems
;
1163 pos
= mgmt
->u
.auth
.variable
;
1164 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1165 if (!elems
.challenge
)
1167 ieee80211_send_auth(sdata
, ifsta
, 3, elems
.challenge
- 2,
1168 elems
.challenge_len
+ 2, 1);
1171 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1172 struct ieee80211_if_sta
*ifsta
,
1173 struct ieee80211_mgmt
*mgmt
,
1176 u16 auth_alg
, auth_transaction
, status_code
;
1178 if (ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
1179 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
1185 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1186 memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1189 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1190 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1193 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1194 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1195 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1197 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1199 * IEEE 802.11 standard does not require authentication in IBSS
1200 * networks and most implementations do not seem to use it.
1201 * However, try to reply to authentication attempts if someone
1202 * has actually implemented this.
1204 if (auth_alg
!= WLAN_AUTH_OPEN
|| auth_transaction
!= 1)
1206 ieee80211_send_auth(sdata
, ifsta
, 2, NULL
, 0, 0);
1209 if (auth_alg
!= ifsta
->auth_alg
||
1210 auth_transaction
!= ifsta
->auth_transaction
)
1213 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1214 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1216 const int num_algs
= ARRAY_SIZE(algs
);
1218 algs
[0] = algs
[1] = algs
[2] = 0xff;
1219 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1220 algs
[0] = WLAN_AUTH_OPEN
;
1221 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1222 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1223 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1224 algs
[2] = WLAN_AUTH_LEAP
;
1225 if (ifsta
->auth_alg
== WLAN_AUTH_OPEN
)
1227 else if (ifsta
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1231 for (i
= 0; i
< num_algs
; i
++) {
1233 if (pos
>= num_algs
)
1235 if (algs
[pos
] == ifsta
->auth_alg
||
1238 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1239 !ieee80211_sta_wep_configured(sdata
))
1241 ifsta
->auth_alg
= algs
[pos
];
1248 switch (ifsta
->auth_alg
) {
1249 case WLAN_AUTH_OPEN
:
1250 case WLAN_AUTH_LEAP
:
1251 ieee80211_auth_completed(sdata
, ifsta
);
1253 case WLAN_AUTH_SHARED_KEY
:
1254 if (ifsta
->auth_transaction
== 4)
1255 ieee80211_auth_completed(sdata
, ifsta
);
1257 ieee80211_auth_challenge(sdata
, ifsta
, mgmt
, len
);
1263 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1264 struct ieee80211_if_sta
*ifsta
,
1265 struct ieee80211_mgmt
*mgmt
,
1273 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1276 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1278 if (ifsta
->flags
& IEEE80211_STA_AUTHENTICATED
)
1279 printk(KERN_DEBUG
"%s: deauthenticated (Reason: %u)\n",
1280 sdata
->dev
->name
, reason_code
);
1282 if (ifsta
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1283 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1284 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1285 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1286 mod_timer(&ifsta
->timer
, jiffies
+
1287 IEEE80211_RETRY_AUTH_INTERVAL
);
1290 ieee80211_set_disassoc(sdata
, ifsta
, true, false, 0);
1291 ifsta
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1295 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1296 struct ieee80211_if_sta
*ifsta
,
1297 struct ieee80211_mgmt
*mgmt
,
1305 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1308 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1310 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
1311 printk(KERN_DEBUG
"%s: disassociated (Reason: %u)\n",
1312 sdata
->dev
->name
, reason_code
);
1314 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1315 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1316 mod_timer(&ifsta
->timer
, jiffies
+
1317 IEEE80211_RETRY_AUTH_INTERVAL
);
1320 ieee80211_set_disassoc(sdata
, ifsta
, false, false, reason_code
);
1324 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1325 struct ieee80211_if_sta
*ifsta
,
1326 struct ieee80211_mgmt
*mgmt
,
1330 struct ieee80211_local
*local
= sdata
->local
;
1331 struct ieee80211_supported_band
*sband
;
1332 struct sta_info
*sta
;
1333 u32 rates
, basic_rates
;
1334 u16 capab_info
, status_code
, aid
;
1335 struct ieee802_11_elems elems
;
1336 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1340 bool have_higher_than_11mbit
= false, newsta
= false;
1341 u16 ap_ht_cap_flags
;
1343 /* AssocResp and ReassocResp have identical structure, so process both
1344 * of them in this function. */
1346 if (ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1352 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1355 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1356 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1357 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1359 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1360 "status=%d aid=%d)\n",
1361 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1362 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1364 pos
= mgmt
->u
.assoc_resp
.variable
;
1365 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1367 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1368 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1369 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1371 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1372 ms
= tu
* 1024 / 1000;
1373 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1374 "comeback duration %u TU (%u ms)\n",
1375 sdata
->dev
->name
, tu
, ms
);
1376 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1377 mod_timer(&ifsta
->timer
,
1378 jiffies
+ msecs_to_jiffies(ms
));
1382 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1383 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1384 sdata
->dev
->name
, status_code
);
1385 /* if this was a reassociation, ensure we try a "full"
1386 * association next time. This works around some broken APs
1387 * which do not correctly reject reassociation requests. */
1388 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1392 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1393 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1394 "set\n", sdata
->dev
->name
, aid
);
1395 aid
&= ~(BIT(15) | BIT(14));
1397 if (!elems
.supp_rates
) {
1398 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1403 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1405 ifsta
->ap_capab
= capab_info
;
1407 kfree(ifsta
->assocresp_ies
);
1408 ifsta
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1409 ifsta
->assocresp_ies
= kmalloc(ifsta
->assocresp_ies_len
, GFP_KERNEL
);
1410 if (ifsta
->assocresp_ies
)
1411 memcpy(ifsta
->assocresp_ies
, pos
, ifsta
->assocresp_ies_len
);
1415 /* Add STA entry for the AP */
1416 sta
= sta_info_get(local
, ifsta
->bssid
);
1418 struct ieee80211_bss
*bss
;
1422 sta
= sta_info_alloc(sdata
, ifsta
->bssid
, GFP_ATOMIC
);
1424 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1425 " the AP\n", sdata
->dev
->name
);
1429 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
1430 local
->hw
.conf
.channel
->center_freq
,
1431 ifsta
->ssid
, ifsta
->ssid_len
);
1433 sta
->last_signal
= bss
->signal
;
1434 sta
->last_qual
= bss
->qual
;
1435 sta
->last_noise
= bss
->noise
;
1436 ieee80211_rx_bss_put(local
, bss
);
1439 /* update new sta with its last rx activity */
1440 sta
->last_rx
= jiffies
;
1444 * FIXME: Do we really need to update the sta_info's information here?
1445 * We already know about the AP (we found it in our list) so it
1446 * should already be filled with the right info, no?
1447 * As is stands, all this is racy because typically we assume
1448 * the information that is filled in here (except flags) doesn't
1449 * change while a STA structure is alive. As such, it should move
1450 * to between the sta_info_alloc() and sta_info_insert() above.
1453 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
1454 WLAN_STA_AUTHORIZED
);
1458 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1460 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1461 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1462 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1465 have_higher_than_11mbit
= true;
1467 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1468 if (sband
->bitrates
[j
].bitrate
== rate
) {
1471 basic_rates
|= BIT(j
);
1477 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1478 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1479 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1482 have_higher_than_11mbit
= true;
1484 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1485 if (sband
->bitrates
[j
].bitrate
== rate
) {
1488 basic_rates
|= BIT(j
);
1494 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1495 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1497 /* cf. IEEE 802.11 9.2.12 */
1498 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1499 have_higher_than_11mbit
)
1500 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1502 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1504 if (elems
.ht_cap_elem
)
1505 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1506 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1508 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1510 rate_control_rate_init(sta
);
1512 if (ifsta
->flags
& IEEE80211_STA_MFP_ENABLED
)
1513 set_sta_flags(sta
, WLAN_STA_MFP
);
1515 if (elems
.wmm_param
)
1516 set_sta_flags(sta
, WLAN_STA_WME
);
1519 int err
= sta_info_insert(sta
);
1521 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1522 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1530 if (elems
.wmm_param
)
1531 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
1532 elems
.wmm_param_len
);
1534 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1535 (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
))
1536 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1539 /* set AID and assoc capability,
1540 * ieee80211_set_associated() will tell the driver */
1541 bss_conf
->aid
= aid
;
1542 bss_conf
->assoc_capability
= capab_info
;
1543 ieee80211_set_associated(sdata
, ifsta
, changed
);
1545 ieee80211_associated(sdata
, ifsta
);
1549 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data
*sdata
,
1550 struct ieee80211_if_sta
*ifsta
,
1551 struct ieee80211_bss
*bss
)
1553 struct ieee80211_local
*local
= sdata
->local
;
1554 int res
= 0, rates
, i
, j
;
1555 struct sk_buff
*skb
;
1556 struct ieee80211_mgmt
*mgmt
;
1558 struct ieee80211_supported_band
*sband
;
1559 union iwreq_data wrqu
;
1561 if (local
->ops
->reset_tsf
) {
1562 /* Reset own TSF to allow time synchronization work. */
1563 local
->ops
->reset_tsf(local_to_hw(local
));
1566 if ((ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
) &&
1567 memcmp(ifsta
->bssid
, bss
->bssid
, ETH_ALEN
) == 0)
1570 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 400 +
1571 sdata
->u
.sta
.ie_proberesp_len
);
1573 printk(KERN_DEBUG
"%s: failed to allocate buffer for probe "
1574 "response\n", sdata
->dev
->name
);
1578 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1580 if (!(ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
)) {
1581 /* Remove possible STA entries from other IBSS networks. */
1582 sta_info_flush_delayed(sdata
);
1585 memcpy(ifsta
->bssid
, bss
->bssid
, ETH_ALEN
);
1586 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
);
1590 local
->hw
.conf
.beacon_int
= bss
->beacon_int
>= 10 ? bss
->beacon_int
: 10;
1592 sdata
->drop_unencrypted
= bss
->capability
&
1593 WLAN_CAPABILITY_PRIVACY
? 1 : 0;
1595 res
= ieee80211_set_freq(sdata
, bss
->freq
);
1600 /* Build IBSS probe response */
1602 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1604 mgmt
= (struct ieee80211_mgmt
*)
1605 skb_put(skb
, 24 + sizeof(mgmt
->u
.beacon
));
1606 memset(mgmt
, 0, 24 + sizeof(mgmt
->u
.beacon
));
1607 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1608 IEEE80211_STYPE_PROBE_RESP
);
1609 memset(mgmt
->da
, 0xff, ETH_ALEN
);
1610 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1611 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
1612 mgmt
->u
.beacon
.beacon_int
=
1613 cpu_to_le16(local
->hw
.conf
.beacon_int
);
1614 mgmt
->u
.beacon
.timestamp
= cpu_to_le64(bss
->timestamp
);
1615 mgmt
->u
.beacon
.capab_info
= cpu_to_le16(bss
->capability
);
1617 pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
1618 *pos
++ = WLAN_EID_SSID
;
1619 *pos
++ = ifsta
->ssid_len
;
1620 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
1622 rates
= bss
->supp_rates_len
;
1625 pos
= skb_put(skb
, 2 + rates
);
1626 *pos
++ = WLAN_EID_SUPP_RATES
;
1628 memcpy(pos
, bss
->supp_rates
, rates
);
1630 if (bss
->band
== IEEE80211_BAND_2GHZ
) {
1631 pos
= skb_put(skb
, 2 + 1);
1632 *pos
++ = WLAN_EID_DS_PARAMS
;
1634 *pos
++ = ieee80211_frequency_to_channel(bss
->freq
);
1637 pos
= skb_put(skb
, 2 + 2);
1638 *pos
++ = WLAN_EID_IBSS_PARAMS
;
1640 /* FIX: set ATIM window based on scan results */
1644 if (bss
->supp_rates_len
> 8) {
1645 rates
= bss
->supp_rates_len
- 8;
1646 pos
= skb_put(skb
, 2 + rates
);
1647 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1649 memcpy(pos
, &bss
->supp_rates
[8], rates
);
1652 add_extra_ies(skb
, sdata
->u
.sta
.ie_proberesp
,
1653 sdata
->u
.sta
.ie_proberesp_len
);
1655 ifsta
->probe_resp
= skb
;
1657 ieee80211_if_config(sdata
, IEEE80211_IFCC_BEACON
|
1658 IEEE80211_IFCC_BEACON_ENABLED
);
1662 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1663 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
1664 int bitrate
= (bss
->supp_rates
[i
] & 0x7f) * 5;
1665 for (j
= 0; j
< sband
->n_bitrates
; j
++)
1666 if (sband
->bitrates
[j
].bitrate
== bitrate
)
1669 ifsta
->supp_rates_bits
[local
->hw
.conf
.channel
->band
] = rates
;
1671 ieee80211_sta_def_wmm_params(sdata
, bss
);
1673 ifsta
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
1674 ifsta
->state
= IEEE80211_STA_MLME_IBSS_JOINED
;
1675 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
1677 ieee80211_led_assoc(local
, true);
1679 memset(&wrqu
, 0, sizeof(wrqu
));
1680 memcpy(wrqu
.ap_addr
.sa_data
, bss
->bssid
, ETH_ALEN
);
1681 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
1686 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1687 struct ieee80211_mgmt
*mgmt
,
1689 struct ieee80211_rx_status
*rx_status
,
1690 struct ieee802_11_elems
*elems
,
1693 struct ieee80211_local
*local
= sdata
->local
;
1695 struct ieee80211_bss
*bss
;
1696 struct sta_info
*sta
;
1697 struct ieee80211_channel
*channel
;
1698 u64 beacon_timestamp
, rx_timestamp
;
1700 enum ieee80211_band band
= rx_status
->band
;
1702 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1703 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1705 freq
= rx_status
->freq
;
1707 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1709 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1712 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&& elems
->supp_rates
&&
1713 memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0) {
1714 supp_rates
= ieee80211_sta_get_rates(local
, elems
, band
);
1718 sta
= sta_info_get(local
, mgmt
->sa
);
1722 prev_rates
= sta
->sta
.supp_rates
[band
];
1723 /* make sure mandatory rates are always added */
1724 sta
->sta
.supp_rates
[band
] = supp_rates
|
1725 ieee80211_mandatory_rates(local
, band
);
1727 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1728 if (sta
->sta
.supp_rates
[band
] != prev_rates
)
1729 printk(KERN_DEBUG
"%s: updated supp_rates set "
1730 "for %pM based on beacon info (0x%llx | "
1731 "0x%llx -> 0x%llx)\n",
1734 (unsigned long long) prev_rates
,
1735 (unsigned long long) supp_rates
,
1736 (unsigned long long) sta
->sta
.supp_rates
[band
]);
1739 ieee80211_ibss_add_sta(sdata
, mgmt
->bssid
, mgmt
->sa
, supp_rates
);
1745 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1750 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1751 (memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0)) {
1752 struct ieee80211_channel_sw_ie
*sw_elem
=
1753 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1754 ieee80211_process_chanswitch(sdata
, sw_elem
, bss
);
1757 /* was just updated in ieee80211_bss_info_update */
1758 beacon_timestamp
= bss
->timestamp
;
1761 * In STA mode, the remaining parameters should not be overridden
1762 * by beacons because they're not necessarily accurate there.
1764 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1765 bss
->last_probe_resp
&& beacon
) {
1766 ieee80211_rx_bss_put(local
, bss
);
1770 /* check if we need to merge IBSS */
1771 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&& beacon
&&
1772 (!(sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
)) &&
1773 bss
->capability
& WLAN_CAPABILITY_IBSS
&&
1774 bss
->freq
== local
->oper_channel
->center_freq
&&
1775 elems
->ssid_len
== sdata
->u
.sta
.ssid_len
&&
1776 memcmp(elems
->ssid
, sdata
->u
.sta
.ssid
,
1777 sdata
->u
.sta
.ssid_len
) == 0) {
1778 if (rx_status
->flag
& RX_FLAG_TSFT
) {
1779 /* in order for correct IBSS merging we need mactime
1781 * since mactime is defined as the time the first data
1782 * symbol of the frame hits the PHY, and the timestamp
1783 * of the beacon is defined as "the time that the data
1784 * symbol containing the first bit of the timestamp is
1785 * transmitted to the PHY plus the transmitting STA’s
1786 * delays through its local PHY from the MAC-PHY
1787 * interface to its interface with the WM"
1788 * (802.11 11.1.2) - equals the time this bit arrives at
1789 * the receiver - we have to take into account the
1790 * offset between the two.
1791 * e.g: at 1 MBit that means mactime is 192 usec earlier
1792 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1795 if (rx_status
->flag
& RX_FLAG_HT
) {
1796 rate
= 65; /* TODO: HT rates */
1798 rate
= local
->hw
.wiphy
->bands
[band
]->
1799 bitrates
[rx_status
->rate_idx
].bitrate
;
1801 rx_timestamp
= rx_status
->mactime
+ (24 * 8 * 10 / rate
);
1802 } else if (local
&& local
->ops
&& local
->ops
->get_tsf
)
1803 /* second best option: get current TSF */
1804 rx_timestamp
= local
->ops
->get_tsf(local_to_hw(local
));
1806 /* can't merge without knowing the TSF */
1807 rx_timestamp
= -1LLU;
1808 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1809 printk(KERN_DEBUG
"RX beacon SA=%pM BSSID="
1810 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1811 mgmt
->sa
, mgmt
->bssid
,
1812 (unsigned long long)rx_timestamp
,
1813 (unsigned long long)beacon_timestamp
,
1814 (unsigned long long)(rx_timestamp
- beacon_timestamp
),
1816 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1817 if (beacon_timestamp
> rx_timestamp
) {
1818 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1819 printk(KERN_DEBUG
"%s: beacon TSF higher than "
1820 "local TSF - IBSS merge with BSSID %pM\n",
1821 sdata
->dev
->name
, mgmt
->bssid
);
1823 ieee80211_sta_join_ibss(sdata
, &sdata
->u
.sta
, bss
);
1824 ieee80211_ibss_add_sta(sdata
, mgmt
->bssid
, mgmt
->sa
, supp_rates
);
1828 ieee80211_rx_bss_put(local
, bss
);
1832 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1833 struct ieee80211_mgmt
*mgmt
,
1835 struct ieee80211_rx_status
*rx_status
)
1838 struct ieee802_11_elems elems
;
1839 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1841 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1842 return; /* ignore ProbeResp to foreign address */
1844 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1848 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1851 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1853 /* direct probe may be part of the association flow */
1854 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
1856 printk(KERN_DEBUG
"%s direct probe responded\n",
1858 ieee80211_authenticate(sdata
, ifsta
);
1863 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1864 struct ieee80211_mgmt
*mgmt
,
1866 struct ieee80211_rx_status
*rx_status
)
1868 struct ieee80211_if_sta
*ifsta
;
1870 struct ieee802_11_elems elems
;
1871 struct ieee80211_local
*local
= sdata
->local
;
1873 bool erp_valid
, directed_tim
;
1876 /* Process beacon from the current BSS */
1877 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1881 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
, &elems
);
1883 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, true);
1885 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1887 ifsta
= &sdata
->u
.sta
;
1889 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1890 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1893 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1896 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
1897 elems
.wmm_param_len
);
1899 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
&&
1900 local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1901 directed_tim
= ieee80211_check_tim(&elems
, ifsta
->aid
);
1904 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1905 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1906 ieee80211_hw_config(local
,
1907 IEEE80211_CONF_CHANGE_PS
);
1908 ieee80211_send_nullfunc(local
, sdata
, 0);
1910 local
->pspolling
= true;
1913 * Here is assumed that the driver will be
1914 * able to send ps-poll frame and receive a
1915 * response even though power save mode is
1916 * enabled, but some drivers might require
1917 * to disable power save here. This needs
1918 * to be investigated.
1920 ieee80211_send_pspoll(local
, sdata
);
1925 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1927 erp_value
= elems
.erp_info
[0];
1931 changed
|= ieee80211_handle_bss_capability(sdata
,
1932 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1933 erp_valid
, erp_value
);
1936 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
) {
1937 struct sta_info
*sta
;
1938 struct ieee80211_supported_band
*sband
;
1939 u16 ap_ht_cap_flags
;
1943 sta
= sta_info_get(local
, ifsta
->bssid
);
1949 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1951 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1952 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1954 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1958 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1962 if (elems
.country_elem
) {
1963 /* Note we are only reviewing this on beacons
1964 * for the BSSID we are associated to */
1965 regulatory_hint_11d(local
->hw
.wiphy
,
1966 elems
.country_elem
, elems
.country_elem_len
);
1968 /* TODO: IBSS also needs this */
1969 if (elems
.pwr_constr_elem
)
1970 ieee80211_handle_pwr_constr(sdata
,
1971 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1972 elems
.pwr_constr_elem
,
1973 elems
.pwr_constr_elem_len
);
1976 ieee80211_bss_info_change_notify(sdata
, changed
);
1980 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data
*sdata
,
1981 struct ieee80211_if_sta
*ifsta
,
1982 struct ieee80211_mgmt
*mgmt
,
1985 struct ieee80211_local
*local
= sdata
->local
;
1987 struct sk_buff
*skb
;
1988 struct ieee80211_mgmt
*resp
;
1991 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
||
1992 ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
||
1993 len
< 24 + 2 || !ifsta
->probe_resp
)
1996 if (local
->ops
->tx_last_beacon
)
1997 tx_last_beacon
= local
->ops
->tx_last_beacon(local_to_hw(local
));
2001 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2002 printk(KERN_DEBUG
"%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
2003 " (tx_last_beacon=%d)\n",
2004 sdata
->dev
->name
, mgmt
->sa
, mgmt
->da
,
2005 mgmt
->bssid
, tx_last_beacon
);
2006 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2008 if (!tx_last_beacon
)
2011 if (memcmp(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
) != 0 &&
2012 memcmp(mgmt
->bssid
, "\xff\xff\xff\xff\xff\xff", ETH_ALEN
) != 0)
2015 end
= ((u8
*) mgmt
) + len
;
2016 pos
= mgmt
->u
.probe_req
.variable
;
2017 if (pos
[0] != WLAN_EID_SSID
||
2018 pos
+ 2 + pos
[1] > end
) {
2019 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2020 printk(KERN_DEBUG
"%s: Invalid SSID IE in ProbeReq "
2022 sdata
->dev
->name
, mgmt
->sa
);
2027 (pos
[1] != ifsta
->ssid_len
||
2028 memcmp(pos
+ 2, ifsta
->ssid
, ifsta
->ssid_len
) != 0)) {
2029 /* Ignore ProbeReq for foreign SSID */
2033 /* Reply with ProbeResp */
2034 skb
= skb_copy(ifsta
->probe_resp
, GFP_KERNEL
);
2038 resp
= (struct ieee80211_mgmt
*) skb
->data
;
2039 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
2040 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2041 printk(KERN_DEBUG
"%s: Sending ProbeResp to %pM\n",
2042 sdata
->dev
->name
, resp
->da
);
2043 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2044 ieee80211_tx_skb(sdata
, skb
, 0);
2047 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
2048 struct ieee80211_rx_status
*rx_status
)
2050 struct ieee80211_local
*local
= sdata
->local
;
2051 struct ieee80211_if_sta
*ifsta
;
2052 struct ieee80211_mgmt
*mgmt
;
2058 ifsta
= &sdata
->u
.sta
;
2060 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2061 fc
= le16_to_cpu(mgmt
->frame_control
);
2063 switch (fc
& IEEE80211_FCTL_STYPE
) {
2064 case IEEE80211_STYPE_PROBE_REQ
:
2065 case IEEE80211_STYPE_PROBE_RESP
:
2066 case IEEE80211_STYPE_BEACON
:
2067 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
2068 case IEEE80211_STYPE_AUTH
:
2069 case IEEE80211_STYPE_ASSOC_RESP
:
2070 case IEEE80211_STYPE_REASSOC_RESP
:
2071 case IEEE80211_STYPE_DEAUTH
:
2072 case IEEE80211_STYPE_DISASSOC
:
2073 skb_queue_tail(&ifsta
->skb_queue
, skb
);
2074 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2082 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2083 struct sk_buff
*skb
)
2085 struct ieee80211_rx_status
*rx_status
;
2086 struct ieee80211_if_sta
*ifsta
;
2087 struct ieee80211_mgmt
*mgmt
;
2090 ifsta
= &sdata
->u
.sta
;
2092 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2093 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2094 fc
= le16_to_cpu(mgmt
->frame_control
);
2096 switch (fc
& IEEE80211_FCTL_STYPE
) {
2097 case IEEE80211_STYPE_PROBE_REQ
:
2098 ieee80211_rx_mgmt_probe_req(sdata
, ifsta
, mgmt
, skb
->len
);
2100 case IEEE80211_STYPE_PROBE_RESP
:
2101 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
, rx_status
);
2103 case IEEE80211_STYPE_BEACON
:
2104 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
2106 case IEEE80211_STYPE_AUTH
:
2107 ieee80211_rx_mgmt_auth(sdata
, ifsta
, mgmt
, skb
->len
);
2109 case IEEE80211_STYPE_ASSOC_RESP
:
2110 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
, skb
->len
, 0);
2112 case IEEE80211_STYPE_REASSOC_RESP
:
2113 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
, skb
->len
, 1);
2115 case IEEE80211_STYPE_DEAUTH
:
2116 ieee80211_rx_mgmt_deauth(sdata
, ifsta
, mgmt
, skb
->len
);
2118 case IEEE80211_STYPE_DISASSOC
:
2119 ieee80211_rx_mgmt_disassoc(sdata
, ifsta
, mgmt
, skb
->len
);
2127 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data
*sdata
)
2129 struct ieee80211_local
*local
= sdata
->local
;
2131 struct sta_info
*sta
;
2135 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
2136 if (sta
->sdata
== sdata
&&
2137 time_after(sta
->last_rx
+ IEEE80211_IBSS_MERGE_INTERVAL
,
2150 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data
*sdata
,
2151 struct ieee80211_if_sta
*ifsta
)
2153 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
2155 ieee80211_sta_expire(sdata
, IEEE80211_IBSS_INACTIVITY_LIMIT
);
2156 if (ieee80211_sta_active_ibss(sdata
))
2159 if ((sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
) &&
2160 (!(sdata
->u
.sta
.flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)))
2163 printk(KERN_DEBUG
"%s: No active IBSS STAs - trying to scan for other "
2164 "IBSS networks with same SSID (merge)\n", sdata
->dev
->name
);
2166 /* XXX maybe racy? */
2167 if (sdata
->local
->scan_req
)
2170 memcpy(sdata
->local
->int_scan_req
.ssids
[0].ssid
,
2171 ifsta
->ssid
, IEEE80211_MAX_SSID_LEN
);
2172 sdata
->local
->int_scan_req
.ssids
[0].ssid_len
= ifsta
->ssid_len
;
2173 ieee80211_request_scan(sdata
, &sdata
->local
->int_scan_req
);
2177 static void ieee80211_sta_timer(unsigned long data
)
2179 struct ieee80211_sub_if_data
*sdata
=
2180 (struct ieee80211_sub_if_data
*) data
;
2181 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2182 struct ieee80211_local
*local
= sdata
->local
;
2184 set_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
2185 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2188 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
,
2189 struct ieee80211_if_sta
*ifsta
)
2191 struct ieee80211_local
*local
= sdata
->local
;
2193 if (local
->ops
->reset_tsf
) {
2194 /* Reset own TSF to allow time synchronization work. */
2195 local
->ops
->reset_tsf(local_to_hw(local
));
2198 ifsta
->wmm_last_param_set
= -1; /* allow any WMM update */
2201 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
2202 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
2203 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
2204 ifsta
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
2205 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
2206 ifsta
->auth_alg
= WLAN_AUTH_LEAP
;
2208 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
2209 ifsta
->auth_transaction
= -1;
2210 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
2211 ifsta
->assoc_scan_tries
= 0;
2212 ifsta
->direct_probe_tries
= 0;
2213 ifsta
->auth_tries
= 0;
2214 ifsta
->assoc_tries
= 0;
2215 netif_tx_stop_all_queues(sdata
->dev
);
2216 netif_carrier_off(sdata
->dev
);
2220 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta
*ifsta
,
2221 const char *ssid
, int ssid_len
)
2223 int tmp
, hidden_ssid
;
2225 if (ssid_len
== ifsta
->ssid_len
&&
2226 !memcmp(ifsta
->ssid
, ssid
, ssid_len
))
2229 if (ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
2235 if (ssid
[tmp
] != '\0') {
2241 if (hidden_ssid
&& (ifsta
->ssid_len
== ssid_len
|| ssid_len
== 0))
2244 if (ssid_len
== 1 && ssid
[0] == ' ')
2250 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data
*sdata
,
2251 struct ieee80211_if_sta
*ifsta
)
2253 struct ieee80211_local
*local
= sdata
->local
;
2254 struct ieee80211_bss
*bss
;
2255 struct ieee80211_supported_band
*sband
;
2256 u8 bssid
[ETH_ALEN
], *pos
;
2260 if (sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
) {
2261 memcpy(bssid
, ifsta
->bssid
, ETH_ALEN
);
2263 /* Generate random, not broadcast, locally administered BSSID. Mix in
2264 * own MAC address to make sure that devices that do not have proper
2265 * random number generator get different BSSID. */
2266 get_random_bytes(bssid
, ETH_ALEN
);
2267 for (i
= 0; i
< ETH_ALEN
; i
++)
2268 bssid
[i
] ^= sdata
->dev
->dev_addr
[i
];
2273 printk(KERN_DEBUG
"%s: Creating new IBSS network, BSSID %pM\n",
2274 sdata
->dev
->name
, bssid
);
2276 bss
= ieee80211_rx_bss_add(local
, bssid
,
2277 local
->hw
.conf
.channel
->center_freq
,
2278 sdata
->u
.sta
.ssid
, sdata
->u
.sta
.ssid_len
);
2282 bss
->band
= local
->hw
.conf
.channel
->band
;
2283 sband
= local
->hw
.wiphy
->bands
[bss
->band
];
2285 if (local
->hw
.conf
.beacon_int
== 0)
2286 local
->hw
.conf
.beacon_int
= 100;
2287 bss
->beacon_int
= local
->hw
.conf
.beacon_int
;
2288 bss
->last_update
= jiffies
;
2289 bss
->capability
= WLAN_CAPABILITY_IBSS
;
2291 if (sdata
->default_key
)
2292 bss
->capability
|= WLAN_CAPABILITY_PRIVACY
;
2294 sdata
->drop_unencrypted
= 0;
2296 bss
->supp_rates_len
= sband
->n_bitrates
;
2297 pos
= bss
->supp_rates
;
2298 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2299 int rate
= sband
->bitrates
[i
].bitrate
;
2300 *pos
++ = (u8
) (rate
/ 5);
2303 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
2304 ieee80211_rx_bss_put(local
, bss
);
2309 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data
*sdata
,
2310 struct ieee80211_if_sta
*ifsta
)
2312 struct ieee80211_local
*local
= sdata
->local
;
2313 struct ieee80211_bss
*bss
;
2318 if (ifsta
->ssid_len
== 0)
2321 active_ibss
= ieee80211_sta_active_ibss(sdata
);
2322 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2323 printk(KERN_DEBUG
"%s: sta_find_ibss (active_ibss=%d)\n",
2324 sdata
->dev
->name
, active_ibss
);
2325 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2326 spin_lock_bh(&local
->bss_lock
);
2327 list_for_each_entry(bss
, &local
->bss_list
, list
) {
2328 if (ifsta
->ssid_len
!= bss
->ssid_len
||
2329 memcmp(ifsta
->ssid
, bss
->ssid
, bss
->ssid_len
) != 0
2330 || !(bss
->capability
& WLAN_CAPABILITY_IBSS
))
2332 if ((ifsta
->flags
& IEEE80211_STA_BSSID_SET
) &&
2333 memcmp(ifsta
->bssid
, bss
->bssid
, ETH_ALEN
) != 0)
2335 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2336 printk(KERN_DEBUG
" bssid=%pM found\n", bss
->bssid
);
2337 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2338 memcpy(bssid
, bss
->bssid
, ETH_ALEN
);
2340 if (active_ibss
|| memcmp(bssid
, ifsta
->bssid
, ETH_ALEN
) != 0)
2343 spin_unlock_bh(&local
->bss_lock
);
2345 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2347 printk(KERN_DEBUG
" sta_find_ibss: selected %pM current "
2348 "%pM\n", bssid
, ifsta
->bssid
);
2349 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2352 ((!(ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
)) ||
2353 memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0)) {
2357 if (ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
2358 search_freq
= bss
->freq
;
2360 search_freq
= local
->hw
.conf
.channel
->center_freq
;
2362 bss
= ieee80211_rx_bss_get(local
, bssid
, search_freq
,
2363 ifsta
->ssid
, ifsta
->ssid_len
);
2367 printk(KERN_DEBUG
"%s: Selected IBSS BSSID %pM"
2368 " based on configured SSID\n",
2369 sdata
->dev
->name
, bssid
);
2370 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
2371 ieee80211_rx_bss_put(local
, bss
);
2376 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2377 printk(KERN_DEBUG
" did not try to join ibss\n");
2378 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2380 /* Selected IBSS not found in current scan results - try to scan */
2381 if (ifsta
->state
== IEEE80211_STA_MLME_IBSS_JOINED
&&
2382 !ieee80211_sta_active_ibss(sdata
)) {
2383 mod_timer(&ifsta
->timer
, jiffies
+
2384 IEEE80211_IBSS_MERGE_INTERVAL
);
2385 } else if (time_after(jiffies
, local
->last_scan_completed
+
2386 IEEE80211_SCAN_INTERVAL
)) {
2387 printk(KERN_DEBUG
"%s: Trigger new scan to find an IBSS to "
2388 "join\n", sdata
->dev
->name
);
2390 /* XXX maybe racy? */
2391 if (local
->scan_req
)
2394 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
2395 ifsta
->ssid
, IEEE80211_MAX_SSID_LEN
);
2396 local
->int_scan_req
.ssids
[0].ssid_len
= ifsta
->ssid_len
;
2397 return ieee80211_request_scan(sdata
, &local
->int_scan_req
);
2398 } else if (ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
) {
2399 int interval
= IEEE80211_SCAN_INTERVAL
;
2401 if (time_after(jiffies
, ifsta
->ibss_join_req
+
2402 IEEE80211_IBSS_JOIN_TIMEOUT
)) {
2403 if ((ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) &&
2404 (!(local
->oper_channel
->flags
&
2405 IEEE80211_CHAN_NO_IBSS
)))
2406 return ieee80211_sta_create_ibss(sdata
, ifsta
);
2407 if (ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) {
2408 printk(KERN_DEBUG
"%s: IBSS not allowed on"
2409 " %d MHz\n", sdata
->dev
->name
,
2410 local
->hw
.conf
.channel
->center_freq
);
2413 /* No IBSS found - decrease scan interval and continue
2415 interval
= IEEE80211_SCAN_INTERVAL_SLOW
;
2418 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
2419 mod_timer(&ifsta
->timer
, jiffies
+ interval
);
2427 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
,
2428 struct ieee80211_if_sta
*ifsta
)
2430 struct ieee80211_local
*local
= sdata
->local
;
2431 struct ieee80211_bss
*bss
, *selected
= NULL
;
2432 int top_rssi
= 0, freq
;
2434 spin_lock_bh(&local
->bss_lock
);
2435 freq
= local
->oper_channel
->center_freq
;
2436 list_for_each_entry(bss
, &local
->bss_list
, list
) {
2437 if (!(bss
->capability
& WLAN_CAPABILITY_ESS
))
2440 if ((ifsta
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
2441 IEEE80211_STA_AUTO_BSSID_SEL
|
2442 IEEE80211_STA_AUTO_CHANNEL_SEL
)) &&
2443 (!!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
) ^
2444 !!sdata
->default_key
))
2447 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
) &&
2451 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
) &&
2452 memcmp(bss
->bssid
, ifsta
->bssid
, ETH_ALEN
))
2455 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) &&
2456 !ieee80211_sta_match_ssid(ifsta
, bss
->ssid
, bss
->ssid_len
))
2459 if (!selected
|| top_rssi
< bss
->signal
) {
2461 top_rssi
= bss
->signal
;
2465 atomic_inc(&selected
->users
);
2466 spin_unlock_bh(&local
->bss_lock
);
2469 ieee80211_set_freq(sdata
, selected
->freq
);
2470 if (!(ifsta
->flags
& IEEE80211_STA_SSID_SET
))
2471 ieee80211_sta_set_ssid(sdata
, selected
->ssid
,
2472 selected
->ssid_len
);
2473 ieee80211_sta_set_bssid(sdata
, selected
->bssid
);
2474 ieee80211_sta_def_wmm_params(sdata
, selected
);
2475 if (sdata
->u
.sta
.mfp
== IEEE80211_MFP_REQUIRED
)
2476 sdata
->u
.sta
.flags
|= IEEE80211_STA_MFP_ENABLED
;
2478 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2480 /* Send out direct probe if no probe resp was received or
2481 * the one we have is outdated
2483 if (!selected
->last_probe_resp
||
2484 time_after(jiffies
, selected
->last_probe_resp
2485 + IEEE80211_SCAN_RESULT_EXPIRE
))
2486 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
2488 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2490 ieee80211_rx_bss_put(local
, selected
);
2491 ieee80211_sta_reset_auth(sdata
, ifsta
);
2494 if (ifsta
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
2495 ifsta
->assoc_scan_tries
++;
2496 /* XXX maybe racy? */
2497 if (local
->scan_req
)
2499 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
2500 ifsta
->ssid
, IEEE80211_MAX_SSID_LEN
);
2501 if (ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
2502 local
->int_scan_req
.ssids
[0].ssid_len
= 0;
2504 local
->int_scan_req
.ssids
[0].ssid_len
= ifsta
->ssid_len
;
2505 ieee80211_start_scan(sdata
, &local
->int_scan_req
);
2506 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2507 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2509 ifsta
->assoc_scan_tries
= 0;
2510 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
2517 static void ieee80211_sta_work(struct work_struct
*work
)
2519 struct ieee80211_sub_if_data
*sdata
=
2520 container_of(work
, struct ieee80211_sub_if_data
, u
.sta
.work
);
2521 struct ieee80211_local
*local
= sdata
->local
;
2522 struct ieee80211_if_sta
*ifsta
;
2523 struct sk_buff
*skb
;
2525 if (!netif_running(sdata
->dev
))
2528 if (local
->sw_scanning
|| local
->hw_scanning
)
2531 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2532 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
))
2534 ifsta
= &sdata
->u
.sta
;
2536 while ((skb
= skb_dequeue(&ifsta
->skb_queue
)))
2537 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2539 if (ifsta
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
2540 ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
2541 ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
2542 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
)) {
2543 ieee80211_start_scan(sdata
, local
->scan_req
);
2547 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
)) {
2548 if (ieee80211_sta_config_auth(sdata
, ifsta
))
2550 clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
2551 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
))
2554 switch (ifsta
->state
) {
2555 case IEEE80211_STA_MLME_DISABLED
:
2557 case IEEE80211_STA_MLME_DIRECT_PROBE
:
2558 ieee80211_direct_probe(sdata
, ifsta
);
2560 case IEEE80211_STA_MLME_AUTHENTICATE
:
2561 ieee80211_authenticate(sdata
, ifsta
);
2563 case IEEE80211_STA_MLME_ASSOCIATE
:
2564 ieee80211_associate(sdata
, ifsta
);
2566 case IEEE80211_STA_MLME_ASSOCIATED
:
2567 ieee80211_associated(sdata
, ifsta
);
2569 case IEEE80211_STA_MLME_IBSS_SEARCH
:
2570 ieee80211_sta_find_ibss(sdata
, ifsta
);
2572 case IEEE80211_STA_MLME_IBSS_JOINED
:
2573 ieee80211_sta_merge_ibss(sdata
, ifsta
);
2580 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
2581 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2582 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
2584 ieee80211_set_disassoc(sdata
, ifsta
, false, true,
2585 WLAN_REASON_UNSPECIFIED
);
2589 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2591 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2592 queue_work(sdata
->local
->hw
.workqueue
,
2593 &sdata
->u
.sta
.work
);
2596 /* interface setup */
2597 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2599 struct ieee80211_if_sta
*ifsta
;
2601 ifsta
= &sdata
->u
.sta
;
2602 INIT_WORK(&ifsta
->work
, ieee80211_sta_work
);
2603 INIT_WORK(&ifsta
->chswitch_work
, ieee80211_chswitch_work
);
2604 setup_timer(&ifsta
->timer
, ieee80211_sta_timer
,
2605 (unsigned long) sdata
);
2606 setup_timer(&ifsta
->chswitch_timer
, ieee80211_chswitch_timer
,
2607 (unsigned long) sdata
);
2608 skb_queue_head_init(&ifsta
->skb_queue
);
2610 ifsta
->capab
= WLAN_CAPABILITY_ESS
;
2611 ifsta
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
2612 IEEE80211_AUTH_ALG_SHARED_KEY
;
2613 ifsta
->flags
|= IEEE80211_STA_CREATE_IBSS
|
2614 IEEE80211_STA_AUTO_BSSID_SEL
|
2615 IEEE80211_STA_AUTO_CHANNEL_SEL
;
2616 if (ieee80211_num_regular_queues(&sdata
->local
->hw
) >= 4)
2617 ifsta
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2621 * Add a new IBSS station, will also be called by the RX code when,
2622 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2623 * must be callable in atomic context.
2625 struct sta_info
*ieee80211_ibss_add_sta(struct ieee80211_sub_if_data
*sdata
,
2626 u8
*bssid
,u8
*addr
, u32 supp_rates
)
2628 struct ieee80211_local
*local
= sdata
->local
;
2629 struct sta_info
*sta
;
2630 int band
= local
->hw
.conf
.channel
->band
;
2632 /* TODO: Could consider removing the least recently used entry and
2633 * allow new one to be added. */
2634 if (local
->num_sta
>= IEEE80211_IBSS_MAX_STA_ENTRIES
) {
2635 if (net_ratelimit()) {
2636 printk(KERN_DEBUG
"%s: No room for a new IBSS STA "
2637 "entry %pM\n", sdata
->dev
->name
, addr
);
2642 if (compare_ether_addr(bssid
, sdata
->u
.sta
.bssid
))
2645 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2646 printk(KERN_DEBUG
"%s: Adding new IBSS station %pM (dev=%s)\n",
2647 wiphy_name(local
->hw
.wiphy
), addr
, sdata
->dev
->name
);
2650 sta
= sta_info_alloc(sdata
, addr
, GFP_ATOMIC
);
2654 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
2656 /* make sure mandatory rates are always added */
2657 sta
->sta
.supp_rates
[band
] = supp_rates
|
2658 ieee80211_mandatory_rates(local
, band
);
2660 rate_control_rate_init(sta
);
2662 if (sta_info_insert(sta
))
2668 /* configuration hooks */
2669 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
,
2670 struct ieee80211_if_sta
*ifsta
)
2672 struct ieee80211_local
*local
= sdata
->local
;
2674 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2677 if ((ifsta
->flags
& (IEEE80211_STA_BSSID_SET
|
2678 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
2679 (ifsta
->flags
& (IEEE80211_STA_SSID_SET
|
2680 IEEE80211_STA_AUTO_SSID_SEL
))) {
2682 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
2683 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
2684 WLAN_REASON_DEAUTH_LEAVING
);
2686 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2687 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2691 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
2693 struct ieee80211_if_sta
*ifsta
;
2695 if (len
> IEEE80211_MAX_SSID_LEN
)
2698 ifsta
= &sdata
->u
.sta
;
2700 if (ifsta
->ssid_len
!= len
|| memcmp(ifsta
->ssid
, ssid
, len
) != 0) {
2701 memset(ifsta
->ssid
, 0, sizeof(ifsta
->ssid
));
2702 memcpy(ifsta
->ssid
, ssid
, len
);
2703 ifsta
->ssid_len
= len
;
2706 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
2709 ifsta
->flags
|= IEEE80211_STA_SSID_SET
;
2711 ifsta
->flags
&= ~IEEE80211_STA_SSID_SET
;
2713 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2714 ifsta
->ibss_join_req
= jiffies
;
2715 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
2716 return ieee80211_sta_find_ibss(sdata
, ifsta
);
2722 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
2724 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2725 memcpy(ssid
, ifsta
->ssid
, ifsta
->ssid_len
);
2726 *len
= ifsta
->ssid_len
;
2730 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2732 struct ieee80211_if_sta
*ifsta
;
2734 ifsta
= &sdata
->u
.sta
;
2736 if (is_valid_ether_addr(bssid
)) {
2737 memcpy(ifsta
->bssid
, bssid
, ETH_ALEN
);
2738 ifsta
->flags
|= IEEE80211_STA_BSSID_SET
;
2740 memset(ifsta
->bssid
, 0, ETH_ALEN
);
2741 ifsta
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2744 if (netif_running(sdata
->dev
)) {
2745 if (ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
)) {
2746 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2747 "the low-level driver\n", sdata
->dev
->name
);
2751 return ieee80211_sta_set_ssid(sdata
, ifsta
->ssid
, ifsta
->ssid_len
);
2754 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
, char *ie
, size_t len
)
2756 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2758 kfree(ifsta
->extra_ie
);
2760 ifsta
->extra_ie
= NULL
;
2761 ifsta
->extra_ie_len
= 0;
2764 ifsta
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2765 if (!ifsta
->extra_ie
) {
2766 ifsta
->extra_ie_len
= 0;
2769 memcpy(ifsta
->extra_ie
, ie
, len
);
2770 ifsta
->extra_ie_len
= len
;
2774 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2776 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2778 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2779 sdata
->dev
->name
, reason
);
2781 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2782 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2785 ieee80211_set_disassoc(sdata
, ifsta
, true, true, reason
);
2789 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2791 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2793 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2794 sdata
->dev
->name
, reason
);
2796 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2799 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
))
2802 ieee80211_set_disassoc(sdata
, ifsta
, false, true, reason
);
2806 /* scan finished notification */
2807 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2809 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2810 struct ieee80211_if_sta
*ifsta
;
2812 if (sdata
&& sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2813 ifsta
= &sdata
->u
.sta
;
2814 if ((!(ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
)) ||
2815 !ieee80211_sta_active_ibss(sdata
))
2816 ieee80211_sta_find_ibss(sdata
, ifsta
);
2819 /* Restart STA timers */
2821 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2822 ieee80211_restart_sta_timer(sdata
);
2826 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
2828 struct ieee80211_local
*local
=
2829 container_of(work
, struct ieee80211_local
,
2830 dynamic_ps_disable_work
);
2832 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2833 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2834 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2837 ieee80211_wake_queues_by_reason(&local
->hw
,
2838 IEEE80211_QUEUE_STOP_REASON_PS
);
2841 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
2843 struct ieee80211_local
*local
=
2844 container_of(work
, struct ieee80211_local
,
2845 dynamic_ps_enable_work
);
2846 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2848 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
2851 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2852 ieee80211_send_nullfunc(local
, sdata
, 1);
2854 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
2855 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2858 void ieee80211_dynamic_ps_timer(unsigned long data
)
2860 struct ieee80211_local
*local
= (void *) data
;
2862 queue_work(local
->hw
.workqueue
, &local
->dynamic_ps_enable_work
);