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
)
58 pos
= bss
->cbss
.information_elements
;
61 end
= pos
+ bss
->cbss
.len_information_elements
;
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
->cbss
.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
->cbss
.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 const size_t supp_rates_len
,
550 const u8
*supp_rates
)
552 struct ieee80211_local
*local
= sdata
->local
;
553 int i
, have_higher_than_11mbit
= 0;
555 /* cf. IEEE 802.11 9.2.12 */
556 for (i
= 0; i
< supp_rates_len
; i
++)
557 if ((supp_rates
[i
] & 0x7f) * 5 > 110)
558 have_higher_than_11mbit
= 1;
560 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
561 have_higher_than_11mbit
)
562 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
564 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
566 ieee80211_set_wmm_default(sdata
);
569 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
570 struct ieee80211_if_sta
*ifsta
,
571 u8
*wmm_param
, size_t wmm_param_len
)
573 struct ieee80211_tx_queue_params params
;
578 if (!(ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
))
584 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
586 count
= wmm_param
[6] & 0x0f;
587 if (count
== ifsta
->wmm_last_param_set
)
589 ifsta
->wmm_last_param_set
= count
;
592 left
= wmm_param_len
- 8;
594 memset(¶ms
, 0, sizeof(params
));
596 if (!local
->ops
->conf_tx
)
600 for (; left
>= 4; left
-= 4, pos
+= 4) {
601 int aci
= (pos
[0] >> 5) & 0x03;
602 int acm
= (pos
[0] >> 4) & 0x01;
609 local
->wmm_acm
|= BIT(0) | BIT(3);
614 local
->wmm_acm
|= BIT(4) | BIT(5);
619 local
->wmm_acm
|= BIT(6) | BIT(7);
625 local
->wmm_acm
|= BIT(1) | BIT(2);
629 params
.aifs
= pos
[0] & 0x0f;
630 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
631 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
632 params
.txop
= get_unaligned_le16(pos
+ 2);
633 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
634 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
635 "cWmin=%d cWmax=%d txop=%d\n",
636 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
637 params
.cw_max
, params
.txop
);
639 /* TODO: handle ACM (block TX, fallback to next lowest allowed
641 if (local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
642 printk(KERN_DEBUG
"%s: failed to set TX queue "
643 "parameters for queue %d\n", local
->mdev
->name
, queue
);
648 static bool ieee80211_check_tim(struct ieee802_11_elems
*elems
, u16 aid
)
651 u8 index
, indexn1
, indexn2
;
652 struct ieee80211_tim_ie
*tim
= (struct ieee80211_tim_ie
*) elems
->tim
;
656 mask
= 1 << (aid
& 7);
658 indexn1
= tim
->bitmap_ctrl
& 0xfe;
659 indexn2
= elems
->tim_len
+ indexn1
- 4;
661 if (index
< indexn1
|| index
> indexn2
)
666 return !!(tim
->virtual_map
[index
] & mask
);
669 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
670 u16 capab
, bool erp_valid
, u8 erp
)
672 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
673 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
674 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
678 bool use_short_preamble
;
682 use_protection
= (erp
& WLAN_ERP_USE_PROTECTION
) != 0;
683 use_short_preamble
= (erp
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
685 use_protection
= false;
686 use_short_preamble
= !!(capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
);
689 use_short_slot
= !!(capab
& WLAN_CAPABILITY_SHORT_SLOT_TIME
);
691 if (use_protection
!= bss_conf
->use_cts_prot
) {
692 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
693 if (net_ratelimit()) {
694 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID=%pM)\n",
696 use_protection
? "enabled" : "disabled",
700 bss_conf
->use_cts_prot
= use_protection
;
701 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
704 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
705 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
706 if (net_ratelimit()) {
707 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
710 use_short_preamble
? "short" : "long",
714 bss_conf
->use_short_preamble
= use_short_preamble
;
715 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
718 if (use_short_slot
!= bss_conf
->use_short_slot
) {
719 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
720 if (net_ratelimit()) {
721 printk(KERN_DEBUG
"%s: switched to %s slot time"
724 use_short_slot
? "short" : "long",
728 bss_conf
->use_short_slot
= use_short_slot
;
729 changed
|= BSS_CHANGED_ERP_SLOT
;
735 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
,
736 struct ieee80211_if_sta
*ifsta
)
738 union iwreq_data wrqu
;
739 memset(&wrqu
, 0, sizeof(wrqu
));
740 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
741 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
742 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
743 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
746 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
,
747 struct ieee80211_if_sta
*ifsta
)
752 union iwreq_data wrqu
;
754 if (!ifsta
->assocreq_ies
&& !ifsta
->assocresp_ies
)
757 buf
= kmalloc(50 + 2 * (ifsta
->assocreq_ies_len
+
758 ifsta
->assocresp_ies_len
), GFP_KERNEL
);
762 len
= sprintf(buf
, "ASSOCINFO(");
763 if (ifsta
->assocreq_ies
) {
764 len
+= sprintf(buf
+ len
, "ReqIEs=");
765 for (i
= 0; i
< ifsta
->assocreq_ies_len
; i
++) {
766 len
+= sprintf(buf
+ len
, "%02x",
767 ifsta
->assocreq_ies
[i
]);
770 if (ifsta
->assocresp_ies
) {
771 if (ifsta
->assocreq_ies
)
772 len
+= sprintf(buf
+ len
, " ");
773 len
+= sprintf(buf
+ len
, "RespIEs=");
774 for (i
= 0; i
< ifsta
->assocresp_ies_len
; i
++) {
775 len
+= sprintf(buf
+ len
, "%02x",
776 ifsta
->assocresp_ies
[i
]);
779 len
+= sprintf(buf
+ len
, ")");
781 if (len
> IW_CUSTOM_MAX
) {
782 len
= sprintf(buf
, "ASSOCRESPIE=");
783 for (i
= 0; i
< ifsta
->assocresp_ies_len
; i
++) {
784 len
+= sprintf(buf
+ len
, "%02x",
785 ifsta
->assocresp_ies
[i
]);
789 if (len
<= IW_CUSTOM_MAX
) {
790 memset(&wrqu
, 0, sizeof(wrqu
));
791 wrqu
.data
.length
= len
;
792 wireless_send_event(sdata
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
799 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
800 struct ieee80211_if_sta
*ifsta
,
801 u32 bss_info_changed
)
803 struct ieee80211_local
*local
= sdata
->local
;
804 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
806 struct ieee80211_bss
*bss
;
808 bss_info_changed
|= BSS_CHANGED_ASSOC
;
809 ifsta
->flags
|= IEEE80211_STA_ASSOCIATED
;
811 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
812 conf
->channel
->center_freq
,
813 ifsta
->ssid
, ifsta
->ssid_len
);
815 /* set timing information */
816 sdata
->vif
.bss_conf
.beacon_int
= bss
->cbss
.beacon_interval
;
817 sdata
->vif
.bss_conf
.timestamp
= bss
->cbss
.tsf
;
818 sdata
->vif
.bss_conf
.dtim_period
= bss
->dtim_period
;
820 bss_info_changed
|= ieee80211_handle_bss_capability(sdata
,
821 bss
->cbss
.capability
, bss
->has_erp_value
, bss
->erp_value
);
823 ieee80211_rx_bss_put(local
, bss
);
826 ifsta
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
827 memcpy(ifsta
->prev_bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
828 ieee80211_sta_send_associnfo(sdata
, ifsta
);
830 ifsta
->last_probe
= jiffies
;
831 ieee80211_led_assoc(local
, 1);
833 sdata
->vif
.bss_conf
.assoc
= 1;
835 * For now just always ask the driver to update the basic rateset
836 * when we have associated, we aren't checking whether it actually
839 bss_info_changed
|= BSS_CHANGED_BASIC_RATES
;
840 ieee80211_bss_info_change_notify(sdata
, bss_info_changed
);
842 if (local
->powersave
) {
843 if (!(local
->hw
.flags
& IEEE80211_HW_SUPPORTS_DYNAMIC_PS
) &&
844 local
->hw
.conf
.dynamic_ps_timeout
> 0) {
845 mod_timer(&local
->dynamic_ps_timer
, jiffies
+
847 local
->hw
.conf
.dynamic_ps_timeout
));
849 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
850 ieee80211_send_nullfunc(local
, sdata
, 1);
851 conf
->flags
|= IEEE80211_CONF_PS
;
852 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
856 netif_tx_start_all_queues(sdata
->dev
);
857 netif_carrier_on(sdata
->dev
);
859 ieee80211_sta_send_apinfo(sdata
, ifsta
);
862 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
,
863 struct ieee80211_if_sta
*ifsta
)
865 ifsta
->direct_probe_tries
++;
866 if (ifsta
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
867 printk(KERN_DEBUG
"%s: direct probe to AP %pM timed out\n",
868 sdata
->dev
->name
, ifsta
->bssid
);
869 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
870 ieee80211_sta_send_apinfo(sdata
, ifsta
);
873 * Most likely AP is not in the range so remove the
874 * bss information associated to the AP
876 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
877 sdata
->local
->hw
.conf
.channel
->center_freq
,
878 ifsta
->ssid
, ifsta
->ssid_len
);
882 printk(KERN_DEBUG
"%s: direct probe to AP %pM try %d\n",
883 sdata
->dev
->name
, ifsta
->bssid
,
884 ifsta
->direct_probe_tries
);
886 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
888 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifsta
->request
);
890 /* Direct probe is sent to broadcast address as some APs
891 * will not answer to direct packet in unassociated state.
893 ieee80211_send_probe_req(sdata
, NULL
,
894 ifsta
->ssid
, ifsta
->ssid_len
);
896 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
900 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
,
901 struct ieee80211_if_sta
*ifsta
)
904 if (ifsta
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
905 printk(KERN_DEBUG
"%s: authentication with AP %pM"
907 sdata
->dev
->name
, ifsta
->bssid
);
908 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
909 ieee80211_sta_send_apinfo(sdata
, ifsta
);
910 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
911 sdata
->local
->hw
.conf
.channel
->center_freq
,
912 ifsta
->ssid
, ifsta
->ssid_len
);
916 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
917 printk(KERN_DEBUG
"%s: authenticate with AP %pM\n",
918 sdata
->dev
->name
, ifsta
->bssid
);
920 ieee80211_send_auth(sdata
, ifsta
, 1, NULL
, 0, 0);
922 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
926 * The disassoc 'reason' argument can be either our own reason
927 * if self disconnected or a reason code from the AP.
929 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
930 struct ieee80211_if_sta
*ifsta
, bool deauth
,
931 bool self_disconnected
, u16 reason
)
933 struct ieee80211_local
*local
= sdata
->local
;
934 struct sta_info
*sta
;
935 u32 changed
= 0, config_changed
= 0;
939 sta
= sta_info_get(local
, ifsta
->bssid
);
946 ifsta
->direct_probe_tries
= 0;
947 ifsta
->auth_tries
= 0;
949 ifsta
->assoc_scan_tries
= 0;
950 ifsta
->assoc_tries
= 0;
952 netif_tx_stop_all_queues(sdata
->dev
);
953 netif_carrier_off(sdata
->dev
);
955 ieee80211_sta_tear_down_BA_sessions(sta
);
957 if (self_disconnected
) {
959 ieee80211_send_deauth_disassoc(sdata
,
960 IEEE80211_STYPE_DEAUTH
, reason
);
962 ieee80211_send_deauth_disassoc(sdata
,
963 IEEE80211_STYPE_DISASSOC
, reason
);
966 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
967 changed
|= ieee80211_reset_erp_info(sdata
);
969 ieee80211_led_assoc(local
, 0);
970 changed
|= BSS_CHANGED_ASSOC
;
971 sdata
->vif
.bss_conf
.assoc
= false;
973 ieee80211_sta_send_apinfo(sdata
, ifsta
);
975 if (self_disconnected
|| reason
== WLAN_REASON_DISASSOC_STA_HAS_LEFT
) {
976 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
977 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
978 sdata
->local
->hw
.conf
.channel
->center_freq
,
979 ifsta
->ssid
, ifsta
->ssid_len
);
984 /* channel(_type) changes are handled by ieee80211_hw_config */
985 local
->oper_channel_type
= NL80211_CHAN_NO_HT
;
987 local
->power_constr_level
= 0;
989 del_timer_sync(&local
->dynamic_ps_timer
);
990 cancel_work_sync(&local
->dynamic_ps_enable_work
);
992 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
993 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
994 config_changed
|= IEEE80211_CONF_CHANGE_PS
;
997 ieee80211_hw_config(local
, config_changed
);
998 ieee80211_bss_info_change_notify(sdata
, changed
);
1002 sta
= sta_info_get(local
, ifsta
->bssid
);
1008 sta_info_unlink(&sta
);
1012 sta_info_destroy(sta
);
1015 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
1017 if (!sdata
|| !sdata
->default_key
||
1018 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
1023 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
,
1024 struct ieee80211_if_sta
*ifsta
)
1026 struct ieee80211_local
*local
= sdata
->local
;
1027 struct ieee80211_bss
*bss
;
1030 int privacy_invoked
;
1032 if (!ifsta
|| (ifsta
->flags
& IEEE80211_STA_MIXED_CELL
))
1035 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
1036 local
->hw
.conf
.channel
->center_freq
,
1037 ifsta
->ssid
, ifsta
->ssid_len
);
1041 bss_privacy
= !!(bss
->cbss
.capability
& WLAN_CAPABILITY_PRIVACY
);
1042 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
1043 privacy_invoked
= !!(ifsta
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
1045 ieee80211_rx_bss_put(local
, bss
);
1047 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
1053 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
,
1054 struct ieee80211_if_sta
*ifsta
)
1056 ifsta
->assoc_tries
++;
1057 if (ifsta
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
1058 printk(KERN_DEBUG
"%s: association with AP %pM"
1060 sdata
->dev
->name
, ifsta
->bssid
);
1061 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
1062 ieee80211_sta_send_apinfo(sdata
, ifsta
);
1063 ieee80211_rx_bss_remove(sdata
, ifsta
->bssid
,
1064 sdata
->local
->hw
.conf
.channel
->center_freq
,
1065 ifsta
->ssid
, ifsta
->ssid_len
);
1069 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1070 printk(KERN_DEBUG
"%s: associate with AP %pM\n",
1071 sdata
->dev
->name
, ifsta
->bssid
);
1072 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
1073 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
1074 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
1075 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
1079 ieee80211_send_assoc(sdata
, ifsta
);
1081 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
1085 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
,
1086 struct ieee80211_if_sta
*ifsta
)
1088 struct ieee80211_local
*local
= sdata
->local
;
1089 struct sta_info
*sta
;
1092 /* TODO: start monitoring current AP signal quality and number of
1093 * missed beacons. Scan other channels every now and then and search
1094 * for better APs. */
1095 /* TODO: remove expired BSSes */
1097 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
1101 sta
= sta_info_get(local
, ifsta
->bssid
);
1103 printk(KERN_DEBUG
"%s: No STA entry for own AP %pM\n",
1104 sdata
->dev
->name
, ifsta
->bssid
);
1108 if (time_after(jiffies
,
1109 sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
1110 if (ifsta
->flags
& IEEE80211_STA_PROBEREQ_POLL
) {
1111 printk(KERN_DEBUG
"%s: No ProbeResp from "
1112 "current AP %pM - assume out of "
1114 sdata
->dev
->name
, ifsta
->bssid
);
1117 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
1120 ifsta
->flags
^= IEEE80211_STA_PROBEREQ_POLL
;
1122 ifsta
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
1123 if (time_after(jiffies
, ifsta
->last_probe
+
1124 IEEE80211_PROBE_INTERVAL
)) {
1125 ifsta
->last_probe
= jiffies
;
1126 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
1136 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
1137 WLAN_REASON_PREV_AUTH_NOT_VALID
);
1139 mod_timer(&ifsta
->timer
, jiffies
+
1140 IEEE80211_MONITORING_INTERVAL
);
1144 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
,
1145 struct ieee80211_if_sta
*ifsta
)
1147 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
1148 ifsta
->flags
|= IEEE80211_STA_AUTHENTICATED
;
1149 ieee80211_associate(sdata
, ifsta
);
1153 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
1154 struct ieee80211_if_sta
*ifsta
,
1155 struct ieee80211_mgmt
*mgmt
,
1159 struct ieee802_11_elems elems
;
1161 pos
= mgmt
->u
.auth
.variable
;
1162 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1163 if (!elems
.challenge
)
1165 ieee80211_send_auth(sdata
, ifsta
, 3, elems
.challenge
- 2,
1166 elems
.challenge_len
+ 2, 1);
1169 static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data
*sdata
,
1170 struct ieee80211_if_sta
*ifsta
,
1171 struct ieee80211_mgmt
*mgmt
,
1174 u16 auth_alg
, auth_transaction
, status_code
;
1179 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1180 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1181 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1184 * IEEE 802.11 standard does not require authentication in IBSS
1185 * networks and most implementations do not seem to use it.
1186 * However, try to reply to authentication attempts if someone
1187 * has actually implemented this.
1189 if (auth_alg
== WLAN_AUTH_OPEN
&& auth_transaction
== 1)
1190 ieee80211_send_auth(sdata
, ifsta
, 2, NULL
, 0, 0);
1193 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
1194 struct ieee80211_if_sta
*ifsta
,
1195 struct ieee80211_mgmt
*mgmt
,
1198 u16 auth_alg
, auth_transaction
, status_code
;
1200 if (ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
)
1206 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1209 if (memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1212 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1213 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1214 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1216 if (auth_alg
!= ifsta
->auth_alg
||
1217 auth_transaction
!= ifsta
->auth_transaction
)
1220 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1221 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1223 const int num_algs
= ARRAY_SIZE(algs
);
1225 algs
[0] = algs
[1] = algs
[2] = 0xff;
1226 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1227 algs
[0] = WLAN_AUTH_OPEN
;
1228 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1229 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1230 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1231 algs
[2] = WLAN_AUTH_LEAP
;
1232 if (ifsta
->auth_alg
== WLAN_AUTH_OPEN
)
1234 else if (ifsta
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1238 for (i
= 0; i
< num_algs
; i
++) {
1240 if (pos
>= num_algs
)
1242 if (algs
[pos
] == ifsta
->auth_alg
||
1245 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1246 !ieee80211_sta_wep_configured(sdata
))
1248 ifsta
->auth_alg
= algs
[pos
];
1255 switch (ifsta
->auth_alg
) {
1256 case WLAN_AUTH_OPEN
:
1257 case WLAN_AUTH_LEAP
:
1258 ieee80211_auth_completed(sdata
, ifsta
);
1260 case WLAN_AUTH_SHARED_KEY
:
1261 if (ifsta
->auth_transaction
== 4)
1262 ieee80211_auth_completed(sdata
, ifsta
);
1264 ieee80211_auth_challenge(sdata
, ifsta
, mgmt
, len
);
1270 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1271 struct ieee80211_if_sta
*ifsta
,
1272 struct ieee80211_mgmt
*mgmt
,
1280 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1283 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1285 if (ifsta
->flags
& IEEE80211_STA_AUTHENTICATED
)
1286 printk(KERN_DEBUG
"%s: deauthenticated (Reason: %u)\n",
1287 sdata
->dev
->name
, reason_code
);
1289 if (ifsta
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1290 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1291 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1292 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1293 mod_timer(&ifsta
->timer
, jiffies
+
1294 IEEE80211_RETRY_AUTH_INTERVAL
);
1297 ieee80211_set_disassoc(sdata
, ifsta
, true, false, 0);
1298 ifsta
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1302 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1303 struct ieee80211_if_sta
*ifsta
,
1304 struct ieee80211_mgmt
*mgmt
,
1312 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1315 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1317 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
1318 printk(KERN_DEBUG
"%s: disassociated (Reason: %u)\n",
1319 sdata
->dev
->name
, reason_code
);
1321 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1322 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1323 mod_timer(&ifsta
->timer
, jiffies
+
1324 IEEE80211_RETRY_AUTH_INTERVAL
);
1327 ieee80211_set_disassoc(sdata
, ifsta
, false, false, reason_code
);
1331 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1332 struct ieee80211_if_sta
*ifsta
,
1333 struct ieee80211_mgmt
*mgmt
,
1337 struct ieee80211_local
*local
= sdata
->local
;
1338 struct ieee80211_supported_band
*sband
;
1339 struct sta_info
*sta
;
1340 u32 rates
, basic_rates
;
1341 u16 capab_info
, status_code
, aid
;
1342 struct ieee802_11_elems elems
;
1343 struct ieee80211_bss_conf
*bss_conf
= &sdata
->vif
.bss_conf
;
1347 bool have_higher_than_11mbit
= false, newsta
= false;
1348 u16 ap_ht_cap_flags
;
1350 /* AssocResp and ReassocResp have identical structure, so process both
1351 * of them in this function. */
1353 if (ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1359 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1362 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1363 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1364 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1366 printk(KERN_DEBUG
"%s: RX %sssocResp from %pM (capab=0x%x "
1367 "status=%d aid=%d)\n",
1368 sdata
->dev
->name
, reassoc
? "Rea" : "A", mgmt
->sa
,
1369 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1371 pos
= mgmt
->u
.assoc_resp
.variable
;
1372 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1374 if (status_code
== WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY
&&
1375 elems
.timeout_int
&& elems
.timeout_int_len
== 5 &&
1376 elems
.timeout_int
[0] == WLAN_TIMEOUT_ASSOC_COMEBACK
) {
1378 tu
= get_unaligned_le32(elems
.timeout_int
+ 1);
1379 ms
= tu
* 1024 / 1000;
1380 printk(KERN_DEBUG
"%s: AP rejected association temporarily; "
1381 "comeback duration %u TU (%u ms)\n",
1382 sdata
->dev
->name
, tu
, ms
);
1383 if (ms
> IEEE80211_ASSOC_TIMEOUT
)
1384 mod_timer(&ifsta
->timer
,
1385 jiffies
+ msecs_to_jiffies(ms
));
1389 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1390 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1391 sdata
->dev
->name
, status_code
);
1392 /* if this was a reassociation, ensure we try a "full"
1393 * association next time. This works around some broken APs
1394 * which do not correctly reject reassociation requests. */
1395 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1399 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1400 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1401 "set\n", sdata
->dev
->name
, aid
);
1402 aid
&= ~(BIT(15) | BIT(14));
1404 if (!elems
.supp_rates
) {
1405 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1410 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1412 ifsta
->ap_capab
= capab_info
;
1414 kfree(ifsta
->assocresp_ies
);
1415 ifsta
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1416 ifsta
->assocresp_ies
= kmalloc(ifsta
->assocresp_ies_len
, GFP_KERNEL
);
1417 if (ifsta
->assocresp_ies
)
1418 memcpy(ifsta
->assocresp_ies
, pos
, ifsta
->assocresp_ies_len
);
1422 /* Add STA entry for the AP */
1423 sta
= sta_info_get(local
, ifsta
->bssid
);
1427 sta
= sta_info_alloc(sdata
, ifsta
->bssid
, GFP_ATOMIC
);
1429 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1430 " the AP\n", sdata
->dev
->name
);
1435 /* update new sta with its last rx activity */
1436 sta
->last_rx
= jiffies
;
1440 * FIXME: Do we really need to update the sta_info's information here?
1441 * We already know about the AP (we found it in our list) so it
1442 * should already be filled with the right info, no?
1443 * As is stands, all this is racy because typically we assume
1444 * the information that is filled in here (except flags) doesn't
1445 * change while a STA structure is alive. As such, it should move
1446 * to between the sta_info_alloc() and sta_info_insert() above.
1449 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
1450 WLAN_STA_AUTHORIZED
);
1454 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1456 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1457 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1458 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1461 have_higher_than_11mbit
= true;
1463 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1464 if (sband
->bitrates
[j
].bitrate
== rate
) {
1467 basic_rates
|= BIT(j
);
1473 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1474 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1475 bool is_basic
= !!(elems
.supp_rates
[i
] & 0x80);
1478 have_higher_than_11mbit
= true;
1480 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1481 if (sband
->bitrates
[j
].bitrate
== rate
) {
1484 basic_rates
|= BIT(j
);
1490 sta
->sta
.supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1491 sdata
->vif
.bss_conf
.basic_rates
= basic_rates
;
1493 /* cf. IEEE 802.11 9.2.12 */
1494 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1495 have_higher_than_11mbit
)
1496 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1498 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1500 if (elems
.ht_cap_elem
)
1501 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1502 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1504 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1506 rate_control_rate_init(sta
);
1508 if (ifsta
->flags
& IEEE80211_STA_MFP_ENABLED
)
1509 set_sta_flags(sta
, WLAN_STA_MFP
);
1511 if (elems
.wmm_param
)
1512 set_sta_flags(sta
, WLAN_STA_WME
);
1515 int err
= sta_info_insert(sta
);
1517 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1518 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1526 if (elems
.wmm_param
)
1527 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
1528 elems
.wmm_param_len
);
1530 if (elems
.ht_info_elem
&& elems
.wmm_param
&&
1531 (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
))
1532 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1535 /* set AID and assoc capability,
1536 * ieee80211_set_associated() will tell the driver */
1537 bss_conf
->aid
= aid
;
1538 bss_conf
->assoc_capability
= capab_info
;
1539 ieee80211_set_associated(sdata
, ifsta
, changed
);
1541 ieee80211_associated(sdata
, ifsta
);
1545 static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data
*sdata
,
1546 struct ieee80211_if_sta
*ifsta
,
1547 const u8
*bssid
, const int beacon_int
,
1549 const size_t supp_rates_len
,
1550 const u8
*supp_rates
,
1551 const u16 capability
)
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
, 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 if (!(ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
)) {
1579 /* Remove possible STA entries from other IBSS networks. */
1580 sta_info_flush_delayed(sdata
);
1583 memcpy(ifsta
->bssid
, bssid
, ETH_ALEN
);
1584 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
);
1588 local
->hw
.conf
.beacon_int
= beacon_int
>= 10 ? beacon_int
: 10;
1590 sdata
->drop_unencrypted
= capability
&
1591 WLAN_CAPABILITY_PRIVACY
? 1 : 0;
1593 res
= ieee80211_set_freq(sdata
, freq
);
1598 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
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
.capab_info
= cpu_to_le16(capability
);
1616 pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
1617 *pos
++ = WLAN_EID_SSID
;
1618 *pos
++ = ifsta
->ssid_len
;
1619 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
1621 rates
= supp_rates_len
;
1624 pos
= skb_put(skb
, 2 + rates
);
1625 *pos
++ = WLAN_EID_SUPP_RATES
;
1627 memcpy(pos
, supp_rates
, rates
);
1629 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
1630 pos
= skb_put(skb
, 2 + 1);
1631 *pos
++ = WLAN_EID_DS_PARAMS
;
1633 *pos
++ = ieee80211_frequency_to_channel(freq
);
1636 pos
= skb_put(skb
, 2 + 2);
1637 *pos
++ = WLAN_EID_IBSS_PARAMS
;
1639 /* FIX: set ATIM window based on scan results */
1643 if (supp_rates_len
> 8) {
1644 rates
= supp_rates_len
- 8;
1645 pos
= skb_put(skb
, 2 + rates
);
1646 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1648 memcpy(pos
, &supp_rates
[8], rates
);
1651 add_extra_ies(skb
, sdata
->u
.sta
.ie_proberesp
,
1652 sdata
->u
.sta
.ie_proberesp_len
);
1654 ifsta
->probe_resp
= skb
;
1656 ieee80211_if_config(sdata
, IEEE80211_IFCC_BEACON
|
1657 IEEE80211_IFCC_BEACON_ENABLED
);
1661 for (i
= 0; i
< supp_rates_len
; i
++) {
1662 int bitrate
= (supp_rates
[i
] & 0x7f) * 5;
1663 for (j
= 0; j
< sband
->n_bitrates
; j
++)
1664 if (sband
->bitrates
[j
].bitrate
== bitrate
)
1667 ifsta
->supp_rates_bits
[local
->hw
.conf
.channel
->band
] = rates
;
1669 ieee80211_sta_def_wmm_params(sdata
, supp_rates_len
, supp_rates
);
1671 ifsta
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
1672 ifsta
->state
= IEEE80211_STA_MLME_IBSS_JOINED
;
1673 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
1675 ieee80211_led_assoc(local
, true);
1677 memset(&wrqu
, 0, sizeof(wrqu
));
1678 memcpy(wrqu
.ap_addr
.sa_data
, bssid
, ETH_ALEN
);
1679 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
1684 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data
*sdata
,
1685 struct ieee80211_if_sta
*ifsta
,
1686 struct ieee80211_bss
*bss
)
1688 return __ieee80211_sta_join_ibss(sdata
, ifsta
,
1690 bss
->cbss
.beacon_interval
,
1691 bss
->cbss
.channel
->center_freq
,
1692 bss
->supp_rates_len
, bss
->supp_rates
,
1693 bss
->cbss
.capability
);
1696 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1697 struct ieee80211_mgmt
*mgmt
,
1699 struct ieee80211_rx_status
*rx_status
,
1700 struct ieee802_11_elems
*elems
,
1703 struct ieee80211_local
*local
= sdata
->local
;
1705 struct ieee80211_bss
*bss
;
1706 struct sta_info
*sta
;
1707 struct ieee80211_channel
*channel
;
1708 u64 beacon_timestamp
, rx_timestamp
;
1710 enum ieee80211_band band
= rx_status
->band
;
1712 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1713 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1715 freq
= rx_status
->freq
;
1717 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1719 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1722 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&& elems
->supp_rates
&&
1723 memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0) {
1724 supp_rates
= ieee80211_sta_get_rates(local
, elems
, band
);
1728 sta
= sta_info_get(local
, mgmt
->sa
);
1732 prev_rates
= sta
->sta
.supp_rates
[band
];
1733 /* make sure mandatory rates are always added */
1734 sta
->sta
.supp_rates
[band
] = supp_rates
|
1735 ieee80211_mandatory_rates(local
, band
);
1737 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1738 if (sta
->sta
.supp_rates
[band
] != prev_rates
)
1739 printk(KERN_DEBUG
"%s: updated supp_rates set "
1740 "for %pM based on beacon info (0x%llx | "
1741 "0x%llx -> 0x%llx)\n",
1744 (unsigned long long) prev_rates
,
1745 (unsigned long long) supp_rates
,
1746 (unsigned long long) sta
->sta
.supp_rates
[band
]);
1749 ieee80211_ibss_add_sta(sdata
, mgmt
->bssid
, mgmt
->sa
, supp_rates
);
1755 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1760 if (elems
->ch_switch_elem
&& (elems
->ch_switch_elem_len
== 3) &&
1761 (memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0)) {
1762 struct ieee80211_channel_sw_ie
*sw_elem
=
1763 (struct ieee80211_channel_sw_ie
*)elems
->ch_switch_elem
;
1764 ieee80211_process_chanswitch(sdata
, sw_elem
, bss
);
1767 /* was just updated in ieee80211_bss_info_update */
1768 beacon_timestamp
= bss
->cbss
.tsf
;
1770 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
1773 /* check if we need to merge IBSS */
1775 /* merge only on beacons (???) */
1779 /* we use a fixed BSSID */
1780 if (sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
)
1784 if (!(bss
->cbss
.capability
& WLAN_CAPABILITY_IBSS
))
1787 /* different channel */
1788 if (bss
->cbss
.channel
!= local
->oper_channel
)
1791 /* different SSID */
1792 if (elems
->ssid_len
!= sdata
->u
.sta
.ssid_len
||
1793 memcmp(elems
->ssid
, sdata
->u
.sta
.ssid
,
1794 sdata
->u
.sta
.ssid_len
))
1797 if (rx_status
->flag
& RX_FLAG_TSFT
) {
1799 * For correct IBSS merging we need mactime; since mactime is
1800 * defined as the time the first data symbol of the frame hits
1801 * the PHY, and the timestamp of the beacon is defined as "the
1802 * time that the data symbol containing the first bit of the
1803 * timestamp is transmitted to the PHY plus the transmitting
1804 * STA's delays through its local PHY from the MAC-PHY
1805 * interface to its interface with the WM" (802.11 11.1.2)
1806 * - equals the time this bit arrives at the receiver - we have
1807 * to take into account the offset between the two.
1809 * E.g. at 1 MBit that means mactime is 192 usec earlier
1810 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1814 if (rx_status
->flag
& RX_FLAG_HT
)
1815 rate
= 65; /* TODO: HT rates */
1817 rate
= local
->hw
.wiphy
->bands
[band
]->
1818 bitrates
[rx_status
->rate_idx
].bitrate
;
1820 rx_timestamp
= rx_status
->mactime
+ (24 * 8 * 10 / rate
);
1821 } else if (local
&& local
->ops
&& local
->ops
->get_tsf
)
1822 /* second best option: get current TSF */
1823 rx_timestamp
= local
->ops
->get_tsf(local_to_hw(local
));
1825 /* can't merge without knowing the TSF */
1826 rx_timestamp
= -1LLU;
1828 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1829 printk(KERN_DEBUG
"RX beacon SA=%pM BSSID="
1830 "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1831 mgmt
->sa
, mgmt
->bssid
,
1832 (unsigned long long)rx_timestamp
,
1833 (unsigned long long)beacon_timestamp
,
1834 (unsigned long long)(rx_timestamp
- beacon_timestamp
),
1838 if (beacon_timestamp
> rx_timestamp
) {
1839 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1840 printk(KERN_DEBUG
"%s: beacon TSF higher than "
1841 "local TSF - IBSS merge with BSSID %pM\n",
1842 sdata
->dev
->name
, mgmt
->bssid
);
1844 ieee80211_sta_join_ibss(sdata
, &sdata
->u
.sta
, bss
);
1845 ieee80211_ibss_add_sta(sdata
, mgmt
->bssid
, mgmt
->sa
, supp_rates
);
1849 ieee80211_rx_bss_put(local
, bss
);
1853 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1854 struct ieee80211_mgmt
*mgmt
,
1856 struct ieee80211_rx_status
*rx_status
)
1859 struct ieee802_11_elems elems
;
1860 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1862 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1863 return; /* ignore ProbeResp to foreign address */
1865 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1869 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1872 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1874 /* direct probe may be part of the association flow */
1875 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
1877 printk(KERN_DEBUG
"%s direct probe responded\n",
1879 ieee80211_authenticate(sdata
, ifsta
);
1884 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1885 struct ieee80211_mgmt
*mgmt
,
1887 struct ieee80211_rx_status
*rx_status
)
1889 struct ieee80211_if_sta
*ifsta
;
1891 struct ieee802_11_elems elems
;
1892 struct ieee80211_local
*local
= sdata
->local
;
1894 bool erp_valid
, directed_tim
;
1897 /* Process beacon from the current BSS */
1898 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1902 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
, &elems
);
1904 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, true);
1906 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1908 ifsta
= &sdata
->u
.sta
;
1910 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1911 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1914 if (rx_status
->freq
!= local
->hw
.conf
.channel
->center_freq
)
1917 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
1918 elems
.wmm_param_len
);
1920 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
&&
1921 local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
1922 directed_tim
= ieee80211_check_tim(&elems
, ifsta
->aid
);
1925 if (local
->hw
.conf
.dynamic_ps_timeout
> 0) {
1926 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
1927 ieee80211_hw_config(local
,
1928 IEEE80211_CONF_CHANGE_PS
);
1929 ieee80211_send_nullfunc(local
, sdata
, 0);
1931 local
->pspolling
= true;
1934 * Here is assumed that the driver will be
1935 * able to send ps-poll frame and receive a
1936 * response even though power save mode is
1937 * enabled, but some drivers might require
1938 * to disable power save here. This needs
1939 * to be investigated.
1941 ieee80211_send_pspoll(local
, sdata
);
1946 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1948 erp_value
= elems
.erp_info
[0];
1952 changed
|= ieee80211_handle_bss_capability(sdata
,
1953 le16_to_cpu(mgmt
->u
.beacon
.capab_info
),
1954 erp_valid
, erp_value
);
1957 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
) {
1958 struct sta_info
*sta
;
1959 struct ieee80211_supported_band
*sband
;
1960 u16 ap_ht_cap_flags
;
1964 sta
= sta_info_get(local
, ifsta
->bssid
);
1970 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1972 ieee80211_ht_cap_ie_to_sta_ht_cap(sband
,
1973 elems
.ht_cap_elem
, &sta
->sta
.ht_cap
);
1975 ap_ht_cap_flags
= sta
->sta
.ht_cap
.cap
;
1979 changed
|= ieee80211_enable_ht(sdata
, elems
.ht_info_elem
,
1983 if (elems
.country_elem
) {
1984 /* Note we are only reviewing this on beacons
1985 * for the BSSID we are associated to */
1986 regulatory_hint_11d(local
->hw
.wiphy
,
1987 elems
.country_elem
, elems
.country_elem_len
);
1989 /* TODO: IBSS also needs this */
1990 if (elems
.pwr_constr_elem
)
1991 ieee80211_handle_pwr_constr(sdata
,
1992 le16_to_cpu(mgmt
->u
.probe_resp
.capab_info
),
1993 elems
.pwr_constr_elem
,
1994 elems
.pwr_constr_elem_len
);
1997 ieee80211_bss_info_change_notify(sdata
, changed
);
2001 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data
*sdata
,
2002 struct ieee80211_if_sta
*ifsta
,
2003 struct ieee80211_mgmt
*mgmt
,
2006 struct ieee80211_local
*local
= sdata
->local
;
2008 struct sk_buff
*skb
;
2009 struct ieee80211_mgmt
*resp
;
2012 if (ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
||
2013 len
< 24 + 2 || !ifsta
->probe_resp
)
2016 if (local
->ops
->tx_last_beacon
)
2017 tx_last_beacon
= local
->ops
->tx_last_beacon(local_to_hw(local
));
2021 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2022 printk(KERN_DEBUG
"%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM"
2023 " (tx_last_beacon=%d)\n",
2024 sdata
->dev
->name
, mgmt
->sa
, mgmt
->da
,
2025 mgmt
->bssid
, tx_last_beacon
);
2026 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2028 if (!tx_last_beacon
)
2031 if (memcmp(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
) != 0 &&
2032 memcmp(mgmt
->bssid
, "\xff\xff\xff\xff\xff\xff", ETH_ALEN
) != 0)
2035 end
= ((u8
*) mgmt
) + len
;
2036 pos
= mgmt
->u
.probe_req
.variable
;
2037 if (pos
[0] != WLAN_EID_SSID
||
2038 pos
+ 2 + pos
[1] > end
) {
2039 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2040 printk(KERN_DEBUG
"%s: Invalid SSID IE in ProbeReq "
2042 sdata
->dev
->name
, mgmt
->sa
);
2047 (pos
[1] != ifsta
->ssid_len
||
2048 memcmp(pos
+ 2, ifsta
->ssid
, ifsta
->ssid_len
) != 0)) {
2049 /* Ignore ProbeReq for foreign SSID */
2053 /* Reply with ProbeResp */
2054 skb
= skb_copy(ifsta
->probe_resp
, GFP_KERNEL
);
2058 resp
= (struct ieee80211_mgmt
*) skb
->data
;
2059 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
2060 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2061 printk(KERN_DEBUG
"%s: Sending ProbeResp to %pM\n",
2062 sdata
->dev
->name
, resp
->da
);
2063 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2064 ieee80211_tx_skb(sdata
, skb
, 0);
2067 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
2068 struct ieee80211_rx_status
*rx_status
)
2070 struct ieee80211_local
*local
= sdata
->local
;
2071 struct ieee80211_if_sta
*ifsta
;
2072 struct ieee80211_mgmt
*mgmt
;
2078 ifsta
= &sdata
->u
.sta
;
2080 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2081 fc
= le16_to_cpu(mgmt
->frame_control
);
2083 switch (fc
& IEEE80211_FCTL_STYPE
) {
2084 case IEEE80211_STYPE_PROBE_REQ
:
2085 case IEEE80211_STYPE_PROBE_RESP
:
2086 case IEEE80211_STYPE_BEACON
:
2087 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
2088 case IEEE80211_STYPE_AUTH
:
2089 case IEEE80211_STYPE_ASSOC_RESP
:
2090 case IEEE80211_STYPE_REASSOC_RESP
:
2091 case IEEE80211_STYPE_DEAUTH
:
2092 case IEEE80211_STYPE_DISASSOC
:
2093 skb_queue_tail(&ifsta
->skb_queue
, skb
);
2094 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2102 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
2103 struct sk_buff
*skb
)
2105 struct ieee80211_rx_status
*rx_status
;
2106 struct ieee80211_if_sta
*ifsta
;
2107 struct ieee80211_mgmt
*mgmt
;
2110 ifsta
= &sdata
->u
.sta
;
2112 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
2113 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
2114 fc
= le16_to_cpu(mgmt
->frame_control
);
2116 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2117 switch (fc
& IEEE80211_FCTL_STYPE
) {
2118 case IEEE80211_STYPE_PROBE_REQ
:
2119 ieee80211_rx_mgmt_probe_req(sdata
, ifsta
, mgmt
,
2122 case IEEE80211_STYPE_PROBE_RESP
:
2123 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
,
2126 case IEEE80211_STYPE_BEACON
:
2127 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
2130 case IEEE80211_STYPE_AUTH
:
2131 ieee80211_rx_mgmt_auth_ibss(sdata
, ifsta
, mgmt
,
2135 } else { /* NL80211_IFTYPE_STATION */
2136 switch (fc
& IEEE80211_FCTL_STYPE
) {
2137 case IEEE80211_STYPE_PROBE_RESP
:
2138 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
,
2141 case IEEE80211_STYPE_BEACON
:
2142 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
,
2145 case IEEE80211_STYPE_AUTH
:
2146 ieee80211_rx_mgmt_auth(sdata
, ifsta
, mgmt
, skb
->len
);
2148 case IEEE80211_STYPE_ASSOC_RESP
:
2149 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
,
2152 case IEEE80211_STYPE_REASSOC_RESP
:
2153 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
,
2156 case IEEE80211_STYPE_DEAUTH
:
2157 ieee80211_rx_mgmt_deauth(sdata
, ifsta
, mgmt
, skb
->len
);
2159 case IEEE80211_STYPE_DISASSOC
:
2160 ieee80211_rx_mgmt_disassoc(sdata
, ifsta
, mgmt
,
2170 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data
*sdata
)
2172 struct ieee80211_local
*local
= sdata
->local
;
2174 struct sta_info
*sta
;
2178 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
2179 if (sta
->sdata
== sdata
&&
2180 time_after(sta
->last_rx
+ IEEE80211_IBSS_MERGE_INTERVAL
,
2193 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data
*sdata
,
2194 struct ieee80211_if_sta
*ifsta
)
2196 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
2198 ieee80211_sta_expire(sdata
, IEEE80211_IBSS_INACTIVITY_LIMIT
);
2199 if (ieee80211_sta_active_ibss(sdata
))
2202 if ((sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
) &&
2203 (!(sdata
->u
.sta
.flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)))
2206 printk(KERN_DEBUG
"%s: No active IBSS STAs - trying to scan for other "
2207 "IBSS networks with same SSID (merge)\n", sdata
->dev
->name
);
2209 /* XXX maybe racy? */
2210 if (sdata
->local
->scan_req
)
2213 memcpy(sdata
->local
->int_scan_req
.ssids
[0].ssid
,
2214 ifsta
->ssid
, IEEE80211_MAX_SSID_LEN
);
2215 sdata
->local
->int_scan_req
.ssids
[0].ssid_len
= ifsta
->ssid_len
;
2216 ieee80211_request_scan(sdata
, &sdata
->local
->int_scan_req
);
2220 static void ieee80211_sta_timer(unsigned long data
)
2222 struct ieee80211_sub_if_data
*sdata
=
2223 (struct ieee80211_sub_if_data
*) data
;
2224 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2225 struct ieee80211_local
*local
= sdata
->local
;
2227 set_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
2228 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2231 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
,
2232 struct ieee80211_if_sta
*ifsta
)
2234 struct ieee80211_local
*local
= sdata
->local
;
2236 if (local
->ops
->reset_tsf
) {
2237 /* Reset own TSF to allow time synchronization work. */
2238 local
->ops
->reset_tsf(local_to_hw(local
));
2241 ifsta
->wmm_last_param_set
= -1; /* allow any WMM update */
2244 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
2245 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
2246 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
2247 ifsta
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
2248 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
2249 ifsta
->auth_alg
= WLAN_AUTH_LEAP
;
2251 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
2252 ifsta
->auth_transaction
= -1;
2253 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
2254 ifsta
->assoc_scan_tries
= 0;
2255 ifsta
->direct_probe_tries
= 0;
2256 ifsta
->auth_tries
= 0;
2257 ifsta
->assoc_tries
= 0;
2258 netif_tx_stop_all_queues(sdata
->dev
);
2259 netif_carrier_off(sdata
->dev
);
2262 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data
*sdata
,
2263 struct ieee80211_if_sta
*ifsta
)
2265 struct ieee80211_local
*local
= sdata
->local
;
2266 struct ieee80211_supported_band
*sband
;
2269 u8 supp_rates
[IEEE80211_MAX_SUPP_RATES
];
2273 if (sdata
->u
.sta
.flags
& IEEE80211_STA_BSSID_SET
) {
2274 memcpy(bssid
, ifsta
->bssid
, ETH_ALEN
);
2276 /* Generate random, not broadcast, locally administered BSSID. Mix in
2277 * own MAC address to make sure that devices that do not have proper
2278 * random number generator get different BSSID. */
2279 get_random_bytes(bssid
, ETH_ALEN
);
2280 for (i
= 0; i
< ETH_ALEN
; i
++)
2281 bssid
[i
] ^= sdata
->dev
->dev_addr
[i
];
2286 printk(KERN_DEBUG
"%s: Creating new IBSS network, BSSID %pM\n",
2287 sdata
->dev
->name
, bssid
);
2289 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
2291 if (local
->hw
.conf
.beacon_int
== 0)
2292 local
->hw
.conf
.beacon_int
= 100;
2294 capability
= WLAN_CAPABILITY_IBSS
;
2296 if (sdata
->default_key
)
2297 capability
|= WLAN_CAPABILITY_PRIVACY
;
2299 sdata
->drop_unencrypted
= 0;
2302 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2303 int rate
= sband
->bitrates
[i
].bitrate
;
2304 *pos
++ = (u8
) (rate
/ 5);
2307 return __ieee80211_sta_join_ibss(sdata
, ifsta
,
2308 bssid
, local
->hw
.conf
.beacon_int
,
2309 local
->hw
.conf
.channel
->center_freq
,
2310 sband
->n_bitrates
, supp_rates
,
2315 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data
*sdata
,
2316 struct ieee80211_if_sta
*ifsta
)
2318 struct ieee80211_local
*local
= sdata
->local
;
2319 struct ieee80211_bss
*bss
;
2322 if (ifsta
->ssid_len
== 0)
2325 active_ibss
= ieee80211_sta_active_ibss(sdata
);
2326 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2327 printk(KERN_DEBUG
"%s: sta_find_ibss (active_ibss=%d)\n",
2328 sdata
->dev
->name
, active_ibss
);
2329 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2334 if (ifsta
->flags
& IEEE80211_STA_BSSID_SET
)
2335 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
, 0,
2336 ifsta
->ssid
, ifsta
->ssid_len
);
2338 bss
= (void *)cfg80211_get_ibss(local
->hw
.wiphy
,
2340 ifsta
->ssid
, ifsta
->ssid_len
);
2342 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2344 printk(KERN_DEBUG
" sta_find_ibss: selected %pM current "
2345 "%pM\n", bss
->cbss
.bssid
, ifsta
->bssid
);
2346 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2349 (!(ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
) ||
2350 memcmp(ifsta
->bssid
, bss
->cbss
.bssid
, ETH_ALEN
))) {
2353 printk(KERN_DEBUG
"%s: Selected IBSS BSSID %pM"
2354 " based on configured SSID\n",
2355 sdata
->dev
->name
, bss
->cbss
.bssid
);
2357 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
2358 ieee80211_rx_bss_put(local
, bss
);
2361 ieee80211_rx_bss_put(local
, bss
);
2363 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2364 printk(KERN_DEBUG
" did not try to join ibss\n");
2365 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2367 /* Selected IBSS not found in current scan results - try to scan */
2368 if (ifsta
->state
== IEEE80211_STA_MLME_IBSS_JOINED
&&
2369 !ieee80211_sta_active_ibss(sdata
)) {
2370 mod_timer(&ifsta
->timer
, jiffies
+
2371 IEEE80211_IBSS_MERGE_INTERVAL
);
2372 } else if (time_after(jiffies
, local
->last_scan_completed
+
2373 IEEE80211_SCAN_INTERVAL
)) {
2374 printk(KERN_DEBUG
"%s: Trigger new scan to find an IBSS to "
2375 "join\n", sdata
->dev
->name
);
2377 /* XXX maybe racy? */
2378 if (local
->scan_req
)
2381 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
2382 ifsta
->ssid
, IEEE80211_MAX_SSID_LEN
);
2383 local
->int_scan_req
.ssids
[0].ssid_len
= ifsta
->ssid_len
;
2384 return ieee80211_request_scan(sdata
, &local
->int_scan_req
);
2385 } else if (ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
) {
2386 int interval
= IEEE80211_SCAN_INTERVAL
;
2388 if (time_after(jiffies
, ifsta
->ibss_join_req
+
2389 IEEE80211_IBSS_JOIN_TIMEOUT
)) {
2390 if ((ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) &&
2391 (!(local
->oper_channel
->flags
&
2392 IEEE80211_CHAN_NO_IBSS
)))
2393 return ieee80211_sta_create_ibss(sdata
, ifsta
);
2394 if (ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) {
2395 printk(KERN_DEBUG
"%s: IBSS not allowed on"
2396 " %d MHz\n", sdata
->dev
->name
,
2397 local
->hw
.conf
.channel
->center_freq
);
2400 /* No IBSS found - decrease scan interval and continue
2402 interval
= IEEE80211_SCAN_INTERVAL_SLOW
;
2405 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
2406 mod_timer(&ifsta
->timer
, jiffies
+ interval
);
2414 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
,
2415 struct ieee80211_if_sta
*ifsta
)
2417 struct ieee80211_local
*local
= sdata
->local
;
2418 struct ieee80211_bss
*bss
;
2419 u8
*bssid
= ifsta
->bssid
, *ssid
= ifsta
->ssid
;
2420 u8 ssid_len
= ifsta
->ssid_len
;
2421 u16 capa_mask
= WLAN_CAPABILITY_ESS
;
2422 u16 capa_val
= WLAN_CAPABILITY_ESS
;
2423 struct ieee80211_channel
*chan
= local
->oper_channel
;
2425 if (ifsta
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
2426 IEEE80211_STA_AUTO_BSSID_SEL
|
2427 IEEE80211_STA_AUTO_CHANNEL_SEL
)) {
2428 capa_mask
|= WLAN_CAPABILITY_PRIVACY
;
2429 if (sdata
->default_key
)
2430 capa_val
|= WLAN_CAPABILITY_PRIVACY
;
2433 if (ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
2436 if (ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
2439 if (ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) {
2444 bss
= (void *)cfg80211_get_bss(local
->hw
.wiphy
, chan
,
2445 bssid
, ssid
, ssid_len
,
2446 capa_mask
, capa_val
);
2449 ieee80211_set_freq(sdata
, bss
->cbss
.channel
->center_freq
);
2450 if (!(ifsta
->flags
& IEEE80211_STA_SSID_SET
))
2451 ieee80211_sta_set_ssid(sdata
, bss
->ssid
,
2453 ieee80211_sta_set_bssid(sdata
, bss
->cbss
.bssid
);
2454 ieee80211_sta_def_wmm_params(sdata
, bss
->supp_rates_len
,
2456 if (sdata
->u
.sta
.mfp
== IEEE80211_MFP_REQUIRED
)
2457 sdata
->u
.sta
.flags
|= IEEE80211_STA_MFP_ENABLED
;
2459 sdata
->u
.sta
.flags
&= ~IEEE80211_STA_MFP_ENABLED
;
2461 /* Send out direct probe if no probe resp was received or
2462 * the one we have is outdated
2464 if (!bss
->last_probe_resp
||
2465 time_after(jiffies
, bss
->last_probe_resp
2466 + IEEE80211_SCAN_RESULT_EXPIRE
))
2467 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
2469 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2471 ieee80211_rx_bss_put(local
, bss
);
2472 ieee80211_sta_reset_auth(sdata
, ifsta
);
2475 if (ifsta
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
2476 ifsta
->assoc_scan_tries
++;
2477 /* XXX maybe racy? */
2478 if (local
->scan_req
)
2480 memcpy(local
->int_scan_req
.ssids
[0].ssid
,
2481 ifsta
->ssid
, IEEE80211_MAX_SSID_LEN
);
2482 if (ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
2483 local
->int_scan_req
.ssids
[0].ssid_len
= 0;
2485 local
->int_scan_req
.ssids
[0].ssid_len
= ifsta
->ssid_len
;
2486 ieee80211_start_scan(sdata
, &local
->int_scan_req
);
2487 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2488 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2490 ifsta
->assoc_scan_tries
= 0;
2491 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
2498 static void ieee80211_sta_work(struct work_struct
*work
)
2500 struct ieee80211_sub_if_data
*sdata
=
2501 container_of(work
, struct ieee80211_sub_if_data
, u
.sta
.work
);
2502 struct ieee80211_local
*local
= sdata
->local
;
2503 struct ieee80211_if_sta
*ifsta
;
2504 struct sk_buff
*skb
;
2506 if (!netif_running(sdata
->dev
))
2509 if (local
->sw_scanning
|| local
->hw_scanning
)
2512 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2513 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
))
2515 ifsta
= &sdata
->u
.sta
;
2517 while ((skb
= skb_dequeue(&ifsta
->skb_queue
)))
2518 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2520 if (ifsta
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
2521 ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
2522 ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
2523 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
)) {
2524 ieee80211_start_scan(sdata
, local
->scan_req
);
2528 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
)) {
2529 if (ieee80211_sta_config_auth(sdata
, ifsta
))
2531 clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
2532 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
))
2535 switch (ifsta
->state
) {
2536 case IEEE80211_STA_MLME_DISABLED
:
2538 case IEEE80211_STA_MLME_DIRECT_PROBE
:
2539 ieee80211_direct_probe(sdata
, ifsta
);
2541 case IEEE80211_STA_MLME_AUTHENTICATE
:
2542 ieee80211_authenticate(sdata
, ifsta
);
2544 case IEEE80211_STA_MLME_ASSOCIATE
:
2545 ieee80211_associate(sdata
, ifsta
);
2547 case IEEE80211_STA_MLME_ASSOCIATED
:
2548 ieee80211_associated(sdata
, ifsta
);
2550 case IEEE80211_STA_MLME_IBSS_SEARCH
:
2551 ieee80211_sta_find_ibss(sdata
, ifsta
);
2553 case IEEE80211_STA_MLME_IBSS_JOINED
:
2554 ieee80211_sta_merge_ibss(sdata
, ifsta
);
2561 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
2562 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2563 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
2565 ieee80211_set_disassoc(sdata
, ifsta
, false, true,
2566 WLAN_REASON_UNSPECIFIED
);
2570 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2572 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2573 queue_work(sdata
->local
->hw
.workqueue
,
2574 &sdata
->u
.sta
.work
);
2577 /* interface setup */
2578 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2580 struct ieee80211_if_sta
*ifsta
;
2582 ifsta
= &sdata
->u
.sta
;
2583 INIT_WORK(&ifsta
->work
, ieee80211_sta_work
);
2584 INIT_WORK(&ifsta
->chswitch_work
, ieee80211_chswitch_work
);
2585 setup_timer(&ifsta
->timer
, ieee80211_sta_timer
,
2586 (unsigned long) sdata
);
2587 setup_timer(&ifsta
->chswitch_timer
, ieee80211_chswitch_timer
,
2588 (unsigned long) sdata
);
2589 skb_queue_head_init(&ifsta
->skb_queue
);
2591 ifsta
->capab
= WLAN_CAPABILITY_ESS
;
2592 ifsta
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
2593 IEEE80211_AUTH_ALG_SHARED_KEY
;
2594 ifsta
->flags
|= IEEE80211_STA_CREATE_IBSS
|
2595 IEEE80211_STA_AUTO_BSSID_SEL
|
2596 IEEE80211_STA_AUTO_CHANNEL_SEL
;
2597 if (ieee80211_num_regular_queues(&sdata
->local
->hw
) >= 4)
2598 ifsta
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2602 * Add a new IBSS station, will also be called by the RX code when,
2603 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2604 * must be callable in atomic context.
2606 struct sta_info
*ieee80211_ibss_add_sta(struct ieee80211_sub_if_data
*sdata
,
2607 u8
*bssid
,u8
*addr
, u32 supp_rates
)
2609 struct ieee80211_local
*local
= sdata
->local
;
2610 struct sta_info
*sta
;
2611 int band
= local
->hw
.conf
.channel
->band
;
2613 /* TODO: Could consider removing the least recently used entry and
2614 * allow new one to be added. */
2615 if (local
->num_sta
>= IEEE80211_IBSS_MAX_STA_ENTRIES
) {
2616 if (net_ratelimit()) {
2617 printk(KERN_DEBUG
"%s: No room for a new IBSS STA "
2618 "entry %pM\n", sdata
->dev
->name
, addr
);
2623 if (compare_ether_addr(bssid
, sdata
->u
.sta
.bssid
))
2626 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2627 printk(KERN_DEBUG
"%s: Adding new IBSS station %pM (dev=%s)\n",
2628 wiphy_name(local
->hw
.wiphy
), addr
, sdata
->dev
->name
);
2631 sta
= sta_info_alloc(sdata
, addr
, GFP_ATOMIC
);
2635 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
2637 /* make sure mandatory rates are always added */
2638 sta
->sta
.supp_rates
[band
] = supp_rates
|
2639 ieee80211_mandatory_rates(local
, band
);
2641 rate_control_rate_init(sta
);
2643 if (sta_info_insert(sta
))
2649 /* configuration hooks */
2650 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
,
2651 struct ieee80211_if_sta
*ifsta
)
2653 struct ieee80211_local
*local
= sdata
->local
;
2655 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2658 if ((ifsta
->flags
& (IEEE80211_STA_BSSID_SET
|
2659 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
2660 (ifsta
->flags
& (IEEE80211_STA_SSID_SET
|
2661 IEEE80211_STA_AUTO_SSID_SEL
))) {
2663 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
2664 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
2665 WLAN_REASON_DEAUTH_LEAVING
);
2667 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2668 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2672 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
2674 struct ieee80211_if_sta
*ifsta
;
2676 if (len
> IEEE80211_MAX_SSID_LEN
)
2679 ifsta
= &sdata
->u
.sta
;
2681 if (ifsta
->ssid_len
!= len
|| memcmp(ifsta
->ssid
, ssid
, len
) != 0) {
2682 memset(ifsta
->ssid
, 0, sizeof(ifsta
->ssid
));
2683 memcpy(ifsta
->ssid
, ssid
, len
);
2684 ifsta
->ssid_len
= len
;
2687 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
2690 ifsta
->flags
|= IEEE80211_STA_SSID_SET
;
2692 ifsta
->flags
&= ~IEEE80211_STA_SSID_SET
;
2694 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2695 ifsta
->ibss_join_req
= jiffies
;
2696 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
2697 return ieee80211_sta_find_ibss(sdata
, ifsta
);
2703 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
2705 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2706 memcpy(ssid
, ifsta
->ssid
, ifsta
->ssid_len
);
2707 *len
= ifsta
->ssid_len
;
2711 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2713 struct ieee80211_if_sta
*ifsta
;
2715 ifsta
= &sdata
->u
.sta
;
2717 if (is_valid_ether_addr(bssid
)) {
2718 memcpy(ifsta
->bssid
, bssid
, ETH_ALEN
);
2719 ifsta
->flags
|= IEEE80211_STA_BSSID_SET
;
2721 memset(ifsta
->bssid
, 0, ETH_ALEN
);
2722 ifsta
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2725 if (netif_running(sdata
->dev
)) {
2726 if (ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
)) {
2727 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2728 "the low-level driver\n", sdata
->dev
->name
);
2732 return ieee80211_sta_set_ssid(sdata
, ifsta
->ssid
, ifsta
->ssid_len
);
2735 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
, char *ie
, size_t len
)
2737 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2739 kfree(ifsta
->extra_ie
);
2741 ifsta
->extra_ie
= NULL
;
2742 ifsta
->extra_ie_len
= 0;
2745 ifsta
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2746 if (!ifsta
->extra_ie
) {
2747 ifsta
->extra_ie_len
= 0;
2750 memcpy(ifsta
->extra_ie
, ie
, len
);
2751 ifsta
->extra_ie_len
= len
;
2755 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2757 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2759 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2760 sdata
->dev
->name
, reason
);
2762 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2763 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2766 ieee80211_set_disassoc(sdata
, ifsta
, true, true, reason
);
2770 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2772 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2774 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2775 sdata
->dev
->name
, reason
);
2777 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2780 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
))
2783 ieee80211_set_disassoc(sdata
, ifsta
, false, true, reason
);
2787 /* scan finished notification */
2788 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2790 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2791 struct ieee80211_if_sta
*ifsta
;
2793 if (sdata
&& sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2794 ifsta
= &sdata
->u
.sta
;
2795 if ((!(ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
)) ||
2796 !ieee80211_sta_active_ibss(sdata
))
2797 ieee80211_sta_find_ibss(sdata
, ifsta
);
2800 /* Restart STA timers */
2802 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2803 ieee80211_restart_sta_timer(sdata
);
2807 void ieee80211_dynamic_ps_disable_work(struct work_struct
*work
)
2809 struct ieee80211_local
*local
=
2810 container_of(work
, struct ieee80211_local
,
2811 dynamic_ps_disable_work
);
2813 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
) {
2814 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_PS
;
2815 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2818 ieee80211_wake_queues_by_reason(&local
->hw
,
2819 IEEE80211_QUEUE_STOP_REASON_PS
);
2822 void ieee80211_dynamic_ps_enable_work(struct work_struct
*work
)
2824 struct ieee80211_local
*local
=
2825 container_of(work
, struct ieee80211_local
,
2826 dynamic_ps_enable_work
);
2827 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2829 if (local
->hw
.conf
.flags
& IEEE80211_CONF_PS
)
2832 if (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
)
2833 ieee80211_send_nullfunc(local
, sdata
, 1);
2835 local
->hw
.conf
.flags
|= IEEE80211_CONF_PS
;
2836 ieee80211_hw_config(local
, IEEE80211_CONF_CHANGE_PS
);
2839 void ieee80211_dynamic_ps_timer(unsigned long data
)
2841 struct ieee80211_local
*local
= (void *) data
;
2843 queue_work(local
->hw
.workqueue
, &local
->dynamic_ps_enable_work
);