2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.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/netdevice.h>
18 #include <linux/if_arp.h>
19 #include <linux/wireless.h>
20 #include <linux/random.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/iw_handler.h>
24 #include <net/mac80211.h>
25 #include <asm/unaligned.h>
27 #include "ieee80211_i.h"
31 #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
32 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
33 #define IEEE80211_AUTH_MAX_TRIES 3
34 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
35 #define IEEE80211_ASSOC_MAX_TRIES 3
36 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
37 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
38 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
39 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
40 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
41 #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
43 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
44 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
46 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
50 static int ecw2cw(int ecw
)
52 return (1 << ecw
) - 1;
55 static u8
*ieee80211_bss_get_ie(struct ieee80211_bss
*bss
, u8 ie
)
62 end
= pos
+ bss
->ies_len
;
64 while (pos
+ 1 < end
) {
65 if (pos
+ 2 + pos
[1] > end
)
75 static int ieee80211_compatible_rates(struct ieee80211_bss
*bss
,
76 struct ieee80211_supported_band
*sband
,
82 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
83 int rate
= (bss
->supp_rates
[i
] & 0x7F) * 5;
85 for (j
= 0; j
< sband
->n_bitrates
; j
++)
86 if (sband
->bitrates
[j
].bitrate
== rate
) {
96 /* also used by mesh code */
97 u64
ieee80211_sta_get_rates(struct ieee80211_local
*local
,
98 struct ieee802_11_elems
*elems
,
99 enum ieee80211_band band
)
101 struct ieee80211_supported_band
*sband
;
102 struct ieee80211_rate
*bitrates
;
106 sband
= local
->hw
.wiphy
->bands
[band
];
110 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
113 bitrates
= sband
->bitrates
;
114 num_rates
= sband
->n_bitrates
;
116 for (i
= 0; i
< elems
->supp_rates_len
+
117 elems
->ext_supp_rates_len
; i
++) {
120 if (i
< elems
->supp_rates_len
)
121 rate
= elems
->supp_rates
[i
];
122 else if (elems
->ext_supp_rates
)
123 rate
= elems
->ext_supp_rates
124 [i
- elems
->supp_rates_len
];
125 own_rate
= 5 * (rate
& 0x7f);
126 for (j
= 0; j
< num_rates
; j
++)
127 if (bitrates
[j
].bitrate
== own_rate
)
128 supp_rates
|= BIT(j
);
133 /* frame sending functions */
135 /* also used by scanning code */
136 void ieee80211_send_probe_req(struct ieee80211_sub_if_data
*sdata
, u8
*dst
,
137 u8
*ssid
, size_t ssid_len
)
139 struct ieee80211_local
*local
= sdata
->local
;
140 struct ieee80211_supported_band
*sband
;
142 struct ieee80211_mgmt
*mgmt
;
143 u8
*pos
, *supp_rates
, *esupp_rates
= NULL
;
146 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
) + 200);
148 printk(KERN_DEBUG
"%s: failed to allocate buffer for probe "
149 "request\n", sdata
->dev
->name
);
152 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
154 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
156 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
157 IEEE80211_STYPE_PROBE_REQ
);
158 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
160 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
161 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
163 memset(mgmt
->da
, 0xff, ETH_ALEN
);
164 memset(mgmt
->bssid
, 0xff, ETH_ALEN
);
166 pos
= skb_put(skb
, 2 + ssid_len
);
167 *pos
++ = WLAN_EID_SSID
;
169 memcpy(pos
, ssid
, ssid_len
);
171 supp_rates
= skb_put(skb
, 2);
172 supp_rates
[0] = WLAN_EID_SUPP_RATES
;
174 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
176 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
177 struct ieee80211_rate
*rate
= &sband
->bitrates
[i
];
179 pos
= skb_put(skb
, 1);
181 } else if (supp_rates
[1] == 8) {
182 esupp_rates
= skb_put(skb
, 3);
183 esupp_rates
[0] = WLAN_EID_EXT_SUPP_RATES
;
185 pos
= &esupp_rates
[2];
187 pos
= skb_put(skb
, 1);
190 *pos
= rate
->bitrate
/ 5;
193 ieee80211_tx_skb(sdata
, skb
, 0);
196 static void ieee80211_send_auth(struct ieee80211_sub_if_data
*sdata
,
197 struct ieee80211_if_sta
*ifsta
,
198 int transaction
, u8
*extra
, size_t extra_len
,
201 struct ieee80211_local
*local
= sdata
->local
;
203 struct ieee80211_mgmt
*mgmt
;
205 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
206 sizeof(*mgmt
) + 6 + extra_len
);
208 printk(KERN_DEBUG
"%s: failed to allocate buffer for auth "
209 "frame\n", sdata
->dev
->name
);
212 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
214 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
215 memset(mgmt
, 0, 24 + 6);
216 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
217 IEEE80211_STYPE_AUTH
);
219 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
220 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
221 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
222 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
223 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(ifsta
->auth_alg
);
224 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
225 ifsta
->auth_transaction
= transaction
+ 1;
226 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
228 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
230 ieee80211_tx_skb(sdata
, skb
, encrypt
);
233 static void ieee80211_send_assoc(struct ieee80211_sub_if_data
*sdata
,
234 struct ieee80211_if_sta
*ifsta
)
236 struct ieee80211_local
*local
= sdata
->local
;
238 struct ieee80211_mgmt
*mgmt
;
239 u8
*pos
, *ies
, *ht_add_ie
;
240 int i
, len
, count
, rates_len
, supp_rates_len
;
242 struct ieee80211_bss
*bss
;
244 struct ieee80211_supported_band
*sband
;
247 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
248 sizeof(*mgmt
) + 200 + ifsta
->extra_ie_len
+
251 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
252 "frame\n", sdata
->dev
->name
);
255 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
257 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
259 capab
= ifsta
->capab
;
261 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
) {
262 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
))
263 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
;
264 if (!(local
->hw
.flags
& IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
))
265 capab
|= WLAN_CAPABILITY_SHORT_PREAMBLE
;
268 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
269 local
->hw
.conf
.channel
->center_freq
,
270 ifsta
->ssid
, ifsta
->ssid_len
);
272 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
273 capab
|= WLAN_CAPABILITY_PRIVACY
;
277 /* get all rates supported by the device and the AP as
278 * some APs don't like getting a superset of their rates
279 * in the association request (e.g. D-Link DAP 1353 in
281 rates_len
= ieee80211_compatible_rates(bss
, sband
, &rates
);
283 if ((bss
->capability
& WLAN_CAPABILITY_SPECTRUM_MGMT
) &&
284 (local
->hw
.flags
& IEEE80211_HW_SPECTRUM_MGMT
))
285 capab
|= WLAN_CAPABILITY_SPECTRUM_MGMT
;
287 ieee80211_rx_bss_put(local
, bss
);
290 rates_len
= sband
->n_bitrates
;
293 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
295 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
296 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
297 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
299 if (ifsta
->flags
& IEEE80211_STA_PREV_BSSID_SET
) {
301 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
302 IEEE80211_STYPE_REASSOC_REQ
);
303 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
304 mgmt
->u
.reassoc_req
.listen_interval
=
305 cpu_to_le16(local
->hw
.conf
.listen_interval
);
306 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifsta
->prev_bssid
,
310 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
311 IEEE80211_STYPE_ASSOC_REQ
);
312 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
313 mgmt
->u
.reassoc_req
.listen_interval
=
314 cpu_to_le16(local
->hw
.conf
.listen_interval
);
318 ies
= pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
319 *pos
++ = WLAN_EID_SSID
;
320 *pos
++ = ifsta
->ssid_len
;
321 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
323 /* add all rates which were marked to be used above */
324 supp_rates_len
= rates_len
;
325 if (supp_rates_len
> 8)
328 len
= sband
->n_bitrates
;
329 pos
= skb_put(skb
, supp_rates_len
+ 2);
330 *pos
++ = WLAN_EID_SUPP_RATES
;
331 *pos
++ = supp_rates_len
;
334 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
335 if (BIT(i
) & rates
) {
336 int rate
= sband
->bitrates
[i
].bitrate
;
337 *pos
++ = (u8
) (rate
/ 5);
343 if (rates_len
> count
) {
344 pos
= skb_put(skb
, rates_len
- count
+ 2);
345 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
346 *pos
++ = rates_len
- count
;
348 for (i
++; i
< sband
->n_bitrates
; i
++) {
349 if (BIT(i
) & rates
) {
350 int rate
= sband
->bitrates
[i
].bitrate
;
351 *pos
++ = (u8
) (rate
/ 5);
356 if (capab
& WLAN_CAPABILITY_SPECTRUM_MGMT
) {
357 /* 1. power capabilities */
358 pos
= skb_put(skb
, 4);
359 *pos
++ = WLAN_EID_PWR_CAPABILITY
;
361 *pos
++ = 0; /* min tx power */
362 *pos
++ = local
->hw
.conf
.channel
->max_power
; /* max tx power */
364 /* 2. supported channels */
365 /* TODO: get this in reg domain format */
366 pos
= skb_put(skb
, 2 * sband
->n_channels
+ 2);
367 *pos
++ = WLAN_EID_SUPPORTED_CHANNELS
;
368 *pos
++ = 2 * sband
->n_channels
;
369 for (i
= 0; i
< sband
->n_channels
; i
++) {
370 *pos
++ = ieee80211_frequency_to_channel(
371 sband
->channels
[i
].center_freq
);
372 *pos
++ = 1; /* one channel in the subband*/
376 if (ifsta
->extra_ie
) {
377 pos
= skb_put(skb
, ifsta
->extra_ie_len
);
378 memcpy(pos
, ifsta
->extra_ie
, ifsta
->extra_ie_len
);
381 if (wmm
&& (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
382 pos
= skb_put(skb
, 9);
383 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
384 *pos
++ = 7; /* len */
385 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
388 *pos
++ = 2; /* WME */
389 *pos
++ = 0; /* WME info */
390 *pos
++ = 1; /* WME ver */
394 /* wmm support is a must to HT */
395 if (wmm
&& (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
) &&
396 sband
->ht_info
.ht_supported
&&
397 (ht_add_ie
= ieee80211_bss_get_ie(bss
, WLAN_EID_HT_EXTRA_INFO
))) {
398 struct ieee80211_ht_addt_info
*ht_add_info
=
399 (struct ieee80211_ht_addt_info
*)ht_add_ie
;
400 u16 cap
= sband
->ht_info
.cap
;
402 u32 flags
= local
->hw
.conf
.channel
->flags
;
404 switch (ht_add_info
->ht_param
& IEEE80211_HT_IE_CHA_SEC_OFFSET
) {
405 case IEEE80211_HT_IE_CHA_SEC_ABOVE
:
406 if (flags
& IEEE80211_CHAN_NO_FAT_ABOVE
) {
407 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH
;
408 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
411 case IEEE80211_HT_IE_CHA_SEC_BELOW
:
412 if (flags
& IEEE80211_CHAN_NO_FAT_BELOW
) {
413 cap
&= ~IEEE80211_HT_CAP_SUP_WIDTH
;
414 cap
&= ~IEEE80211_HT_CAP_SGI_40
;
419 tmp
= cpu_to_le16(cap
);
420 pos
= skb_put(skb
, sizeof(struct ieee80211_ht_cap
)+2);
421 *pos
++ = WLAN_EID_HT_CAPABILITY
;
422 *pos
++ = sizeof(struct ieee80211_ht_cap
);
423 memset(pos
, 0, sizeof(struct ieee80211_ht_cap
));
424 memcpy(pos
, &tmp
, sizeof(u16
));
426 /* TODO: needs a define here for << 2 */
427 *pos
++ = sband
->ht_info
.ampdu_factor
|
428 (sband
->ht_info
.ampdu_density
<< 2);
429 memcpy(pos
, sband
->ht_info
.supp_mcs_set
, 16);
432 kfree(ifsta
->assocreq_ies
);
433 ifsta
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
434 ifsta
->assocreq_ies
= kmalloc(ifsta
->assocreq_ies_len
, GFP_KERNEL
);
435 if (ifsta
->assocreq_ies
)
436 memcpy(ifsta
->assocreq_ies
, ies
, ifsta
->assocreq_ies_len
);
438 ieee80211_tx_skb(sdata
, skb
, 0);
442 static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data
*sdata
,
443 u16 stype
, u16 reason
)
445 struct ieee80211_local
*local
= sdata
->local
;
446 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
448 struct ieee80211_mgmt
*mgmt
;
450 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
452 printk(KERN_DEBUG
"%s: failed to allocate buffer for "
453 "deauth/disassoc frame\n", sdata
->dev
->name
);
456 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
458 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
460 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
461 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
462 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
463 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
| stype
);
465 /* u.deauth.reason_code == u.disassoc.reason_code */
466 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
468 ieee80211_tx_skb(sdata
, skb
, 0);
472 static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data
*sdata
,
473 struct ieee80211_bss
*bss
)
475 struct ieee80211_local
*local
= sdata
->local
;
476 int i
, have_higher_than_11mbit
= 0;
478 /* cf. IEEE 802.11 9.2.12 */
479 for (i
= 0; i
< bss
->supp_rates_len
; i
++)
480 if ((bss
->supp_rates
[i
] & 0x7f) * 5 > 110)
481 have_higher_than_11mbit
= 1;
483 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
484 have_higher_than_11mbit
)
485 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
487 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
489 ieee80211_set_wmm_default(sdata
);
492 static void ieee80211_sta_wmm_params(struct ieee80211_local
*local
,
493 struct ieee80211_if_sta
*ifsta
,
494 u8
*wmm_param
, size_t wmm_param_len
)
496 struct ieee80211_tx_queue_params params
;
501 if (!(ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
))
507 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
509 count
= wmm_param
[6] & 0x0f;
510 if (count
== ifsta
->wmm_last_param_set
)
512 ifsta
->wmm_last_param_set
= count
;
515 left
= wmm_param_len
- 8;
517 memset(¶ms
, 0, sizeof(params
));
519 if (!local
->ops
->conf_tx
)
523 for (; left
>= 4; left
-= 4, pos
+= 4) {
524 int aci
= (pos
[0] >> 5) & 0x03;
525 int acm
= (pos
[0] >> 4) & 0x01;
532 local
->wmm_acm
|= BIT(0) | BIT(3);
537 local
->wmm_acm
|= BIT(4) | BIT(5);
542 local
->wmm_acm
|= BIT(6) | BIT(7);
548 local
->wmm_acm
|= BIT(1) | BIT(2);
552 params
.aifs
= pos
[0] & 0x0f;
553 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
554 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
555 params
.txop
= get_unaligned_le16(pos
+ 2);
556 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
557 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
558 "cWmin=%d cWmax=%d txop=%d\n",
559 local
->mdev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
560 params
.cw_max
, params
.txop
);
562 /* TODO: handle ACM (block TX, fallback to next lowest allowed
564 if (local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
565 printk(KERN_DEBUG
"%s: failed to set TX queue "
566 "parameters for queue %d\n", local
->mdev
->name
, queue
);
571 static u32
ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data
*sdata
,
573 bool use_short_preamble
)
575 struct ieee80211_bss_conf
*bss_conf
= &sdata
->bss_conf
;
576 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
577 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
578 DECLARE_MAC_BUF(mac
);
582 if (use_protection
!= bss_conf
->use_cts_prot
) {
583 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
584 if (net_ratelimit()) {
585 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID="
588 use_protection
? "enabled" : "disabled",
589 print_mac(mac
, ifsta
->bssid
));
592 bss_conf
->use_cts_prot
= use_protection
;
593 changed
|= BSS_CHANGED_ERP_CTS_PROT
;
596 if (use_short_preamble
!= bss_conf
->use_short_preamble
) {
597 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
598 if (net_ratelimit()) {
599 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
602 use_short_preamble
? "short" : "long",
603 print_mac(mac
, ifsta
->bssid
));
606 bss_conf
->use_short_preamble
= use_short_preamble
;
607 changed
|= BSS_CHANGED_ERP_PREAMBLE
;
613 static u32
ieee80211_handle_erp_ie(struct ieee80211_sub_if_data
*sdata
,
616 bool use_protection
= (erp_value
& WLAN_ERP_USE_PROTECTION
) != 0;
617 bool use_short_preamble
= (erp_value
& WLAN_ERP_BARKER_PREAMBLE
) == 0;
619 return ieee80211_handle_protect_preamb(sdata
,
620 use_protection
, use_short_preamble
);
623 static u32
ieee80211_handle_bss_capability(struct ieee80211_sub_if_data
*sdata
,
624 struct ieee80211_bss
*bss
)
628 if (bss
->has_erp_value
)
629 changed
|= ieee80211_handle_erp_ie(sdata
, bss
->erp_value
);
631 u16 capab
= bss
->capability
;
632 changed
|= ieee80211_handle_protect_preamb(sdata
, false,
633 (capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
) != 0);
639 static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data
*sdata
,
640 struct ieee80211_if_sta
*ifsta
)
642 union iwreq_data wrqu
;
643 memset(&wrqu
, 0, sizeof(wrqu
));
644 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
645 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
646 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
647 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
650 static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data
*sdata
,
651 struct ieee80211_if_sta
*ifsta
)
653 union iwreq_data wrqu
;
655 if (ifsta
->assocreq_ies
) {
656 memset(&wrqu
, 0, sizeof(wrqu
));
657 wrqu
.data
.length
= ifsta
->assocreq_ies_len
;
658 wireless_send_event(sdata
->dev
, IWEVASSOCREQIE
, &wrqu
,
659 ifsta
->assocreq_ies
);
661 if (ifsta
->assocresp_ies
) {
662 memset(&wrqu
, 0, sizeof(wrqu
));
663 wrqu
.data
.length
= ifsta
->assocresp_ies_len
;
664 wireless_send_event(sdata
->dev
, IWEVASSOCRESPIE
, &wrqu
,
665 ifsta
->assocresp_ies
);
670 static void ieee80211_set_associated(struct ieee80211_sub_if_data
*sdata
,
671 struct ieee80211_if_sta
*ifsta
)
673 struct ieee80211_local
*local
= sdata
->local
;
674 struct ieee80211_conf
*conf
= &local_to_hw(local
)->conf
;
675 u32 changed
= BSS_CHANGED_ASSOC
;
677 struct ieee80211_bss
*bss
;
679 ifsta
->flags
|= IEEE80211_STA_ASSOCIATED
;
681 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
684 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
685 conf
->channel
->center_freq
,
686 ifsta
->ssid
, ifsta
->ssid_len
);
688 /* set timing information */
689 sdata
->bss_conf
.beacon_int
= bss
->beacon_int
;
690 sdata
->bss_conf
.timestamp
= bss
->timestamp
;
691 sdata
->bss_conf
.dtim_period
= bss
->dtim_period
;
693 changed
|= ieee80211_handle_bss_capability(sdata
, bss
);
695 ieee80211_rx_bss_put(local
, bss
);
698 if (conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
) {
699 changed
|= BSS_CHANGED_HT
;
700 sdata
->bss_conf
.assoc_ht
= 1;
701 sdata
->bss_conf
.ht_conf
= &conf
->ht_conf
;
702 sdata
->bss_conf
.ht_bss_conf
= &conf
->ht_bss_conf
;
705 ifsta
->flags
|= IEEE80211_STA_PREV_BSSID_SET
;
706 memcpy(ifsta
->prev_bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
707 ieee80211_sta_send_associnfo(sdata
, ifsta
);
709 ifsta
->last_probe
= jiffies
;
710 ieee80211_led_assoc(local
, 1);
712 sdata
->bss_conf
.assoc
= 1;
714 * For now just always ask the driver to update the basic rateset
715 * when we have associated, we aren't checking whether it actually
718 changed
|= BSS_CHANGED_BASIC_RATES
;
719 ieee80211_bss_info_change_notify(sdata
, changed
);
721 netif_tx_start_all_queues(sdata
->dev
);
722 netif_carrier_on(sdata
->dev
);
724 ieee80211_sta_send_apinfo(sdata
, ifsta
);
727 static void ieee80211_direct_probe(struct ieee80211_sub_if_data
*sdata
,
728 struct ieee80211_if_sta
*ifsta
)
730 DECLARE_MAC_BUF(mac
);
732 ifsta
->direct_probe_tries
++;
733 if (ifsta
->direct_probe_tries
> IEEE80211_AUTH_MAX_TRIES
) {
734 printk(KERN_DEBUG
"%s: direct probe to AP %s timed out\n",
735 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
736 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
740 printk(KERN_DEBUG
"%s: direct probe to AP %s try %d\n",
741 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
),
742 ifsta
->direct_probe_tries
);
744 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
746 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE
, &ifsta
->request
);
748 /* Direct probe is sent to broadcast address as some APs
749 * will not answer to direct packet in unassociated state.
751 ieee80211_send_probe_req(sdata
, NULL
,
752 ifsta
->ssid
, ifsta
->ssid_len
);
754 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
758 static void ieee80211_authenticate(struct ieee80211_sub_if_data
*sdata
,
759 struct ieee80211_if_sta
*ifsta
)
761 DECLARE_MAC_BUF(mac
);
764 if (ifsta
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
765 printk(KERN_DEBUG
"%s: authentication with AP %s"
767 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
768 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
772 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
773 printk(KERN_DEBUG
"%s: authenticate with AP %s\n",
774 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
776 ieee80211_send_auth(sdata
, ifsta
, 1, NULL
, 0, 0);
778 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
781 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data
*sdata
,
782 struct ieee80211_if_sta
*ifsta
, bool deauth
,
783 bool self_disconnected
, u16 reason
)
785 struct ieee80211_local
*local
= sdata
->local
;
786 struct sta_info
*sta
;
787 u32 changed
= BSS_CHANGED_ASSOC
;
791 sta
= sta_info_get(local
, ifsta
->bssid
);
798 ifsta
->direct_probe_tries
= 0;
799 ifsta
->auth_tries
= 0;
801 ifsta
->assoc_scan_tries
= 0;
802 ifsta
->assoc_tries
= 0;
804 netif_tx_stop_all_queues(sdata
->dev
);
805 netif_carrier_off(sdata
->dev
);
807 ieee80211_sta_tear_down_BA_sessions(sdata
, sta
->addr
);
809 if (self_disconnected
) {
811 ieee80211_send_deauth_disassoc(sdata
,
812 IEEE80211_STYPE_DEAUTH
, reason
);
814 ieee80211_send_deauth_disassoc(sdata
,
815 IEEE80211_STYPE_DISASSOC
, reason
);
818 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
819 changed
|= ieee80211_reset_erp_info(sdata
);
821 if (sdata
->bss_conf
.assoc_ht
)
822 changed
|= BSS_CHANGED_HT
;
824 sdata
->bss_conf
.assoc_ht
= 0;
825 sdata
->bss_conf
.ht_conf
= NULL
;
826 sdata
->bss_conf
.ht_bss_conf
= NULL
;
828 ieee80211_led_assoc(local
, 0);
829 sdata
->bss_conf
.assoc
= 0;
831 ieee80211_sta_send_apinfo(sdata
, ifsta
);
833 if (self_disconnected
)
834 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
836 sta_info_unlink(&sta
);
840 sta_info_destroy(sta
);
843 static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data
*sdata
)
845 if (!sdata
|| !sdata
->default_key
||
846 sdata
->default_key
->conf
.alg
!= ALG_WEP
)
851 static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data
*sdata
,
852 struct ieee80211_if_sta
*ifsta
)
854 struct ieee80211_local
*local
= sdata
->local
;
855 struct ieee80211_bss
*bss
;
860 if (!ifsta
|| (ifsta
->flags
& IEEE80211_STA_MIXED_CELL
))
863 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
864 local
->hw
.conf
.channel
->center_freq
,
865 ifsta
->ssid
, ifsta
->ssid_len
);
869 bss_privacy
= !!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
);
870 wep_privacy
= !!ieee80211_sta_wep_configured(sdata
);
871 privacy_invoked
= !!(ifsta
->flags
& IEEE80211_STA_PRIVACY_INVOKED
);
873 ieee80211_rx_bss_put(local
, bss
);
875 if ((bss_privacy
== wep_privacy
) || (bss_privacy
== privacy_invoked
))
881 static void ieee80211_associate(struct ieee80211_sub_if_data
*sdata
,
882 struct ieee80211_if_sta
*ifsta
)
884 DECLARE_MAC_BUF(mac
);
886 ifsta
->assoc_tries
++;
887 if (ifsta
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
888 printk(KERN_DEBUG
"%s: association with AP %s"
890 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
891 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
895 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
896 printk(KERN_DEBUG
"%s: associate with AP %s\n",
897 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
898 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
899 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
900 "mixed-cell disabled - abort association\n", sdata
->dev
->name
);
901 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
905 ieee80211_send_assoc(sdata
, ifsta
);
907 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
911 static void ieee80211_associated(struct ieee80211_sub_if_data
*sdata
,
912 struct ieee80211_if_sta
*ifsta
)
914 struct ieee80211_local
*local
= sdata
->local
;
915 struct sta_info
*sta
;
917 DECLARE_MAC_BUF(mac
);
919 /* TODO: start monitoring current AP signal quality and number of
920 * missed beacons. Scan other channels every now and then and search
922 /* TODO: remove expired BSSes */
924 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATED
;
928 sta
= sta_info_get(local
, ifsta
->bssid
);
930 printk(KERN_DEBUG
"%s: No STA entry for own AP %s\n",
931 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
935 if (time_after(jiffies
,
936 sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
937 if (ifsta
->flags
& IEEE80211_STA_PROBEREQ_POLL
) {
938 printk(KERN_DEBUG
"%s: No ProbeResp from "
939 "current AP %s - assume out of "
941 sdata
->dev
->name
, print_mac(mac
, ifsta
->bssid
));
944 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
946 local
->scan_ssid_len
);
947 ifsta
->flags
^= IEEE80211_STA_PROBEREQ_POLL
;
949 ifsta
->flags
&= ~IEEE80211_STA_PROBEREQ_POLL
;
950 if (time_after(jiffies
, ifsta
->last_probe
+
951 IEEE80211_PROBE_INTERVAL
)) {
952 ifsta
->last_probe
= jiffies
;
953 ieee80211_send_probe_req(sdata
, ifsta
->bssid
,
963 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
964 WLAN_REASON_PREV_AUTH_NOT_VALID
);
966 mod_timer(&ifsta
->timer
, jiffies
+
967 IEEE80211_MONITORING_INTERVAL
);
971 static void ieee80211_auth_completed(struct ieee80211_sub_if_data
*sdata
,
972 struct ieee80211_if_sta
*ifsta
)
974 printk(KERN_DEBUG
"%s: authenticated\n", sdata
->dev
->name
);
975 ifsta
->flags
|= IEEE80211_STA_AUTHENTICATED
;
976 ieee80211_associate(sdata
, ifsta
);
980 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data
*sdata
,
981 struct ieee80211_if_sta
*ifsta
,
982 struct ieee80211_mgmt
*mgmt
,
986 struct ieee802_11_elems elems
;
988 pos
= mgmt
->u
.auth
.variable
;
989 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
990 if (!elems
.challenge
)
992 ieee80211_send_auth(sdata
, ifsta
, 3, elems
.challenge
- 2,
993 elems
.challenge_len
+ 2, 1);
996 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data
*sdata
,
997 struct ieee80211_if_sta
*ifsta
,
998 struct ieee80211_mgmt
*mgmt
,
1001 u16 auth_alg
, auth_transaction
, status_code
;
1002 DECLARE_MAC_BUF(mac
);
1004 if (ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
1005 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
1011 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1012 memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1015 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1016 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1019 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
1020 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
1021 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
1023 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
1025 * IEEE 802.11 standard does not require authentication in IBSS
1026 * networks and most implementations do not seem to use it.
1027 * However, try to reply to authentication attempts if someone
1028 * has actually implemented this.
1030 if (auth_alg
!= WLAN_AUTH_OPEN
|| auth_transaction
!= 1)
1032 ieee80211_send_auth(sdata
, ifsta
, 2, NULL
, 0, 0);
1035 if (auth_alg
!= ifsta
->auth_alg
||
1036 auth_transaction
!= ifsta
->auth_transaction
)
1039 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1040 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1042 const int num_algs
= ARRAY_SIZE(algs
);
1044 algs
[0] = algs
[1] = algs
[2] = 0xff;
1045 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1046 algs
[0] = WLAN_AUTH_OPEN
;
1047 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1048 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1049 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1050 algs
[2] = WLAN_AUTH_LEAP
;
1051 if (ifsta
->auth_alg
== WLAN_AUTH_OPEN
)
1053 else if (ifsta
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1057 for (i
= 0; i
< num_algs
; i
++) {
1059 if (pos
>= num_algs
)
1061 if (algs
[pos
] == ifsta
->auth_alg
||
1064 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1065 !ieee80211_sta_wep_configured(sdata
))
1067 ifsta
->auth_alg
= algs
[pos
];
1074 switch (ifsta
->auth_alg
) {
1075 case WLAN_AUTH_OPEN
:
1076 case WLAN_AUTH_LEAP
:
1077 ieee80211_auth_completed(sdata
, ifsta
);
1079 case WLAN_AUTH_SHARED_KEY
:
1080 if (ifsta
->auth_transaction
== 4)
1081 ieee80211_auth_completed(sdata
, ifsta
);
1083 ieee80211_auth_challenge(sdata
, ifsta
, mgmt
, len
);
1089 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data
*sdata
,
1090 struct ieee80211_if_sta
*ifsta
,
1091 struct ieee80211_mgmt
*mgmt
,
1095 DECLARE_MAC_BUF(mac
);
1100 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1103 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1105 if (ifsta
->flags
& IEEE80211_STA_AUTHENTICATED
)
1106 printk(KERN_DEBUG
"%s: deauthenticated\n", sdata
->dev
->name
);
1108 if (ifsta
->state
== IEEE80211_STA_MLME_AUTHENTICATE
||
1109 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATE
||
1110 ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1111 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
1112 mod_timer(&ifsta
->timer
, jiffies
+
1113 IEEE80211_RETRY_AUTH_INTERVAL
);
1116 ieee80211_set_disassoc(sdata
, ifsta
, true, false, 0);
1117 ifsta
->flags
&= ~IEEE80211_STA_AUTHENTICATED
;
1121 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data
*sdata
,
1122 struct ieee80211_if_sta
*ifsta
,
1123 struct ieee80211_mgmt
*mgmt
,
1127 DECLARE_MAC_BUF(mac
);
1132 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
))
1135 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1137 if (ifsta
->flags
& IEEE80211_STA_ASSOCIATED
)
1138 printk(KERN_DEBUG
"%s: disassociated\n", sdata
->dev
->name
);
1140 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
) {
1141 ifsta
->state
= IEEE80211_STA_MLME_ASSOCIATE
;
1142 mod_timer(&ifsta
->timer
, jiffies
+
1143 IEEE80211_RETRY_AUTH_INTERVAL
);
1146 ieee80211_set_disassoc(sdata
, ifsta
, false, false, 0);
1150 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data
*sdata
,
1151 struct ieee80211_if_sta
*ifsta
,
1152 struct ieee80211_mgmt
*mgmt
,
1156 struct ieee80211_local
*local
= sdata
->local
;
1157 struct ieee80211_supported_band
*sband
;
1158 struct sta_info
*sta
;
1159 u64 rates
, basic_rates
;
1160 u16 capab_info
, status_code
, aid
;
1161 struct ieee802_11_elems elems
;
1162 struct ieee80211_bss_conf
*bss_conf
= &sdata
->bss_conf
;
1165 DECLARE_MAC_BUF(mac
);
1166 bool have_higher_than_11mbit
= false;
1168 /* AssocResp and ReassocResp have identical structure, so process both
1169 * of them in this function. */
1171 if (ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
)
1177 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0)
1180 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1181 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1182 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1184 printk(KERN_DEBUG
"%s: RX %sssocResp from %s (capab=0x%x "
1185 "status=%d aid=%d)\n",
1186 sdata
->dev
->name
, reassoc
? "Rea" : "A", print_mac(mac
, mgmt
->sa
),
1187 capab_info
, status_code
, (u16
)(aid
& ~(BIT(15) | BIT(14))));
1189 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1190 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1191 sdata
->dev
->name
, status_code
);
1192 /* if this was a reassociation, ensure we try a "full"
1193 * association next time. This works around some broken APs
1194 * which do not correctly reject reassociation requests. */
1195 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
1199 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1200 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1201 "set\n", sdata
->dev
->name
, aid
);
1202 aid
&= ~(BIT(15) | BIT(14));
1204 pos
= mgmt
->u
.assoc_resp
.variable
;
1205 ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
);
1207 if (!elems
.supp_rates
) {
1208 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1213 printk(KERN_DEBUG
"%s: associated\n", sdata
->dev
->name
);
1215 ifsta
->ap_capab
= capab_info
;
1217 kfree(ifsta
->assocresp_ies
);
1218 ifsta
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1219 ifsta
->assocresp_ies
= kmalloc(ifsta
->assocresp_ies_len
, GFP_KERNEL
);
1220 if (ifsta
->assocresp_ies
)
1221 memcpy(ifsta
->assocresp_ies
, pos
, ifsta
->assocresp_ies_len
);
1225 /* Add STA entry for the AP */
1226 sta
= sta_info_get(local
, ifsta
->bssid
);
1228 struct ieee80211_bss
*bss
;
1231 sta
= sta_info_alloc(sdata
, ifsta
->bssid
, GFP_ATOMIC
);
1233 printk(KERN_DEBUG
"%s: failed to alloc STA entry for"
1234 " the AP\n", sdata
->dev
->name
);
1238 bss
= ieee80211_rx_bss_get(local
, ifsta
->bssid
,
1239 local
->hw
.conf
.channel
->center_freq
,
1240 ifsta
->ssid
, ifsta
->ssid_len
);
1242 sta
->last_signal
= bss
->signal
;
1243 sta
->last_qual
= bss
->qual
;
1244 sta
->last_noise
= bss
->noise
;
1245 ieee80211_rx_bss_put(local
, bss
);
1248 err
= sta_info_insert(sta
);
1250 printk(KERN_DEBUG
"%s: failed to insert STA entry for"
1251 " the AP (error %d)\n", sdata
->dev
->name
, err
);
1255 /* update new sta with its last rx activity */
1256 sta
->last_rx
= jiffies
;
1260 * FIXME: Do we really need to update the sta_info's information here?
1261 * We already know about the AP (we found it in our list) so it
1262 * should already be filled with the right info, no?
1263 * As is stands, all this is racy because typically we assume
1264 * the information that is filled in here (except flags) doesn't
1265 * change while a STA structure is alive. As such, it should move
1266 * to between the sta_info_alloc() and sta_info_insert() above.
1269 set_sta_flags(sta
, WLAN_STA_AUTH
| WLAN_STA_ASSOC
| WLAN_STA_ASSOC_AP
|
1270 WLAN_STA_AUTHORIZED
);
1274 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1276 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1277 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1280 have_higher_than_11mbit
= true;
1282 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1283 if (sband
->bitrates
[j
].bitrate
== rate
)
1285 if (elems
.supp_rates
[i
] & 0x80)
1286 basic_rates
|= BIT(j
);
1290 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1291 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1294 have_higher_than_11mbit
= true;
1296 for (j
= 0; j
< sband
->n_bitrates
; j
++) {
1297 if (sband
->bitrates
[j
].bitrate
== rate
)
1299 if (elems
.ext_supp_rates
[i
] & 0x80)
1300 basic_rates
|= BIT(j
);
1304 sta
->supp_rates
[local
->hw
.conf
.channel
->band
] = rates
;
1305 sdata
->bss_conf
.basic_rates
= basic_rates
;
1307 /* cf. IEEE 802.11 9.2.12 */
1308 if (local
->hw
.conf
.channel
->band
== IEEE80211_BAND_2GHZ
&&
1309 have_higher_than_11mbit
)
1310 sdata
->flags
|= IEEE80211_SDATA_OPERATING_GMODE
;
1312 sdata
->flags
&= ~IEEE80211_SDATA_OPERATING_GMODE
;
1314 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&& elems
.wmm_param
&&
1315 (ifsta
->flags
& IEEE80211_STA_WMM_ENABLED
)) {
1316 struct ieee80211_ht_bss_info bss_info
;
1317 ieee80211_ht_cap_ie_to_ht_info(
1318 (struct ieee80211_ht_cap
*)
1319 elems
.ht_cap_elem
, &sta
->ht_info
);
1320 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1321 (struct ieee80211_ht_addt_info
*)
1322 elems
.ht_info_elem
, &bss_info
);
1323 ieee80211_handle_ht(local
, 1, &sta
->ht_info
, &bss_info
);
1326 rate_control_rate_init(sta
, local
);
1328 if (elems
.wmm_param
) {
1329 set_sta_flags(sta
, WLAN_STA_WME
);
1331 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
1332 elems
.wmm_param_len
);
1336 /* set AID and assoc capability,
1337 * ieee80211_set_associated() will tell the driver */
1338 bss_conf
->aid
= aid
;
1339 bss_conf
->assoc_capability
= capab_info
;
1340 ieee80211_set_associated(sdata
, ifsta
);
1342 ieee80211_associated(sdata
, ifsta
);
1346 static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data
*sdata
,
1347 struct ieee80211_if_sta
*ifsta
,
1348 struct ieee80211_bss
*bss
)
1350 struct ieee80211_local
*local
= sdata
->local
;
1351 int res
, rates
, i
, j
;
1352 struct sk_buff
*skb
;
1353 struct ieee80211_mgmt
*mgmt
;
1355 struct ieee80211_supported_band
*sband
;
1356 union iwreq_data wrqu
;
1358 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1360 /* Remove possible STA entries from other IBSS networks. */
1361 sta_info_flush_delayed(sdata
);
1363 if (local
->ops
->reset_tsf
) {
1364 /* Reset own TSF to allow time synchronization work. */
1365 local
->ops
->reset_tsf(local_to_hw(local
));
1367 memcpy(ifsta
->bssid
, bss
->bssid
, ETH_ALEN
);
1368 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
);
1372 local
->hw
.conf
.beacon_int
= bss
->beacon_int
>= 10 ? bss
->beacon_int
: 10;
1374 sdata
->drop_unencrypted
= bss
->capability
&
1375 WLAN_CAPABILITY_PRIVACY
? 1 : 0;
1377 res
= ieee80211_set_freq(sdata
, bss
->freq
);
1382 /* Build IBSS probe response */
1383 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 400);
1385 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1387 mgmt
= (struct ieee80211_mgmt
*)
1388 skb_put(skb
, 24 + sizeof(mgmt
->u
.beacon
));
1389 memset(mgmt
, 0, 24 + sizeof(mgmt
->u
.beacon
));
1390 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1391 IEEE80211_STYPE_PROBE_RESP
);
1392 memset(mgmt
->da
, 0xff, ETH_ALEN
);
1393 memcpy(mgmt
->sa
, sdata
->dev
->dev_addr
, ETH_ALEN
);
1394 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
1395 mgmt
->u
.beacon
.beacon_int
=
1396 cpu_to_le16(local
->hw
.conf
.beacon_int
);
1397 mgmt
->u
.beacon
.timestamp
= cpu_to_le64(bss
->timestamp
);
1398 mgmt
->u
.beacon
.capab_info
= cpu_to_le16(bss
->capability
);
1400 pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
1401 *pos
++ = WLAN_EID_SSID
;
1402 *pos
++ = ifsta
->ssid_len
;
1403 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
1405 rates
= bss
->supp_rates_len
;
1408 pos
= skb_put(skb
, 2 + rates
);
1409 *pos
++ = WLAN_EID_SUPP_RATES
;
1411 memcpy(pos
, bss
->supp_rates
, rates
);
1413 if (bss
->band
== IEEE80211_BAND_2GHZ
) {
1414 pos
= skb_put(skb
, 2 + 1);
1415 *pos
++ = WLAN_EID_DS_PARAMS
;
1417 *pos
++ = ieee80211_frequency_to_channel(bss
->freq
);
1420 pos
= skb_put(skb
, 2 + 2);
1421 *pos
++ = WLAN_EID_IBSS_PARAMS
;
1423 /* FIX: set ATIM window based on scan results */
1427 if (bss
->supp_rates_len
> 8) {
1428 rates
= bss
->supp_rates_len
- 8;
1429 pos
= skb_put(skb
, 2 + rates
);
1430 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
1432 memcpy(pos
, &bss
->supp_rates
[8], rates
);
1435 ifsta
->probe_resp
= skb
;
1437 ieee80211_if_config(sdata
, IEEE80211_IFCC_BEACON
);
1441 sband
= local
->hw
.wiphy
->bands
[local
->hw
.conf
.channel
->band
];
1442 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
1443 int bitrate
= (bss
->supp_rates
[i
] & 0x7f) * 5;
1444 for (j
= 0; j
< sband
->n_bitrates
; j
++)
1445 if (sband
->bitrates
[j
].bitrate
== bitrate
)
1448 ifsta
->supp_rates_bits
[local
->hw
.conf
.channel
->band
] = rates
;
1450 ieee80211_sta_def_wmm_params(sdata
, bss
);
1452 ifsta
->state
= IEEE80211_STA_MLME_IBSS_JOINED
;
1453 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
1455 memset(&wrqu
, 0, sizeof(wrqu
));
1456 memcpy(wrqu
.ap_addr
.sa_data
, bss
->bssid
, ETH_ALEN
);
1457 wireless_send_event(sdata
->dev
, SIOCGIWAP
, &wrqu
, NULL
);
1462 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data
*sdata
,
1463 struct ieee80211_mgmt
*mgmt
,
1465 struct ieee80211_rx_status
*rx_status
,
1466 struct ieee802_11_elems
*elems
,
1469 struct ieee80211_local
*local
= sdata
->local
;
1471 struct ieee80211_bss
*bss
;
1472 struct sta_info
*sta
;
1473 struct ieee80211_channel
*channel
;
1474 u64 beacon_timestamp
, rx_timestamp
;
1476 enum ieee80211_band band
= rx_status
->band
;
1477 DECLARE_MAC_BUF(mac
);
1478 DECLARE_MAC_BUF(mac2
);
1480 if (elems
->ds_params
&& elems
->ds_params_len
== 1)
1481 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0]);
1483 freq
= rx_status
->freq
;
1485 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1487 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1490 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&& elems
->supp_rates
&&
1491 memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0) {
1492 supp_rates
= ieee80211_sta_get_rates(local
, elems
, band
);
1496 sta
= sta_info_get(local
, mgmt
->sa
);
1500 prev_rates
= sta
->supp_rates
[band
];
1501 /* make sure mandatory rates are always added */
1502 sta
->supp_rates
[band
] = supp_rates
|
1503 ieee80211_mandatory_rates(local
, band
);
1505 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1506 if (sta
->supp_rates
[band
] != prev_rates
)
1507 printk(KERN_DEBUG
"%s: updated supp_rates set "
1508 "for %s based on beacon info (0x%llx | "
1509 "0x%llx -> 0x%llx)\n",
1510 sdata
->dev
->name
, print_mac(mac
, sta
->addr
),
1511 (unsigned long long) prev_rates
,
1512 (unsigned long long) supp_rates
,
1513 (unsigned long long) sta
->supp_rates
[band
]);
1516 ieee80211_ibss_add_sta(sdata
, NULL
, mgmt
->bssid
,
1517 mgmt
->sa
, supp_rates
);
1523 bss
= ieee80211_bss_info_update(local
, rx_status
, mgmt
, len
, elems
,
1528 /* was just updated in ieee80211_bss_info_update */
1529 beacon_timestamp
= bss
->timestamp
;
1532 * In STA mode, the remaining parameters should not be overridden
1533 * by beacons because they're not necessarily accurate there.
1535 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
&&
1536 bss
->last_probe_resp
&& beacon
) {
1537 ieee80211_rx_bss_put(local
, bss
);
1541 /* check if we need to merge IBSS */
1542 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&& beacon
&&
1543 bss
->capability
& WLAN_CAPABILITY_IBSS
&&
1544 bss
->freq
== local
->oper_channel
->center_freq
&&
1545 elems
->ssid_len
== sdata
->u
.sta
.ssid_len
&&
1546 memcmp(elems
->ssid
, sdata
->u
.sta
.ssid
,
1547 sdata
->u
.sta
.ssid_len
) == 0) {
1548 if (rx_status
->flag
& RX_FLAG_TSFT
) {
1549 /* in order for correct IBSS merging we need mactime
1551 * since mactime is defined as the time the first data
1552 * symbol of the frame hits the PHY, and the timestamp
1553 * of the beacon is defined as "the time that the data
1554 * symbol containing the first bit of the timestamp is
1555 * transmitted to the PHY plus the transmitting STA’s
1556 * delays through its local PHY from the MAC-PHY
1557 * interface to its interface with the WM"
1558 * (802.11 11.1.2) - equals the time this bit arrives at
1559 * the receiver - we have to take into account the
1560 * offset between the two.
1561 * e.g: at 1 MBit that means mactime is 192 usec earlier
1562 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
1564 int rate
= local
->hw
.wiphy
->bands
[band
]->
1565 bitrates
[rx_status
->rate_idx
].bitrate
;
1566 rx_timestamp
= rx_status
->mactime
+ (24 * 8 * 10 / rate
);
1567 } else if (local
&& local
->ops
&& local
->ops
->get_tsf
)
1568 /* second best option: get current TSF */
1569 rx_timestamp
= local
->ops
->get_tsf(local_to_hw(local
));
1571 /* can't merge without knowing the TSF */
1572 rx_timestamp
= -1LLU;
1573 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1574 printk(KERN_DEBUG
"RX beacon SA=%s BSSID="
1575 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
1576 print_mac(mac
, mgmt
->sa
),
1577 print_mac(mac2
, mgmt
->bssid
),
1578 (unsigned long long)rx_timestamp
,
1579 (unsigned long long)beacon_timestamp
,
1580 (unsigned long long)(rx_timestamp
- beacon_timestamp
),
1582 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1583 if (beacon_timestamp
> rx_timestamp
) {
1584 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1585 printk(KERN_DEBUG
"%s: beacon TSF higher than "
1586 "local TSF - IBSS merge with BSSID %s\n",
1587 sdata
->dev
->name
, print_mac(mac
, mgmt
->bssid
));
1589 ieee80211_sta_join_ibss(sdata
, &sdata
->u
.sta
, bss
);
1590 ieee80211_ibss_add_sta(sdata
, NULL
,
1591 mgmt
->bssid
, mgmt
->sa
,
1596 ieee80211_rx_bss_put(local
, bss
);
1600 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data
*sdata
,
1601 struct ieee80211_mgmt
*mgmt
,
1603 struct ieee80211_rx_status
*rx_status
)
1606 struct ieee802_11_elems elems
;
1607 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1609 if (memcmp(mgmt
->da
, sdata
->dev
->dev_addr
, ETH_ALEN
))
1610 return; /* ignore ProbeResp to foreign address */
1612 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1616 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1619 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, false);
1621 /* direct probe may be part of the association flow */
1622 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE
,
1624 printk(KERN_DEBUG
"%s direct probe responded\n",
1626 ieee80211_authenticate(sdata
, ifsta
);
1631 static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data
*sdata
,
1632 struct ieee80211_mgmt
*mgmt
,
1634 struct ieee80211_rx_status
*rx_status
)
1636 struct ieee80211_if_sta
*ifsta
;
1638 struct ieee802_11_elems elems
;
1639 struct ieee80211_local
*local
= sdata
->local
;
1640 struct ieee80211_conf
*conf
= &local
->hw
.conf
;
1643 /* Process beacon from the current BSS */
1644 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1648 ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
, &elems
);
1650 ieee80211_rx_bss_info(sdata
, mgmt
, len
, rx_status
, &elems
, true);
1652 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
1654 ifsta
= &sdata
->u
.sta
;
1656 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
) ||
1657 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1660 ieee80211_sta_wmm_params(local
, ifsta
, elems
.wmm_param
,
1661 elems
.wmm_param_len
);
1663 if (elems
.erp_info
&& elems
.erp_info_len
>= 1)
1664 changed
|= ieee80211_handle_erp_ie(sdata
, elems
.erp_info
[0]);
1666 u16 capab
= le16_to_cpu(mgmt
->u
.beacon
.capab_info
);
1667 changed
|= ieee80211_handle_protect_preamb(sdata
, false,
1668 (capab
& WLAN_CAPABILITY_SHORT_PREAMBLE
) != 0);
1671 if (elems
.ht_cap_elem
&& elems
.ht_info_elem
&&
1672 elems
.wmm_param
&& conf
->flags
& IEEE80211_CONF_SUPPORT_HT_MODE
) {
1673 struct ieee80211_ht_bss_info bss_info
;
1675 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1676 (struct ieee80211_ht_addt_info
*)
1677 elems
.ht_info_elem
, &bss_info
);
1678 changed
|= ieee80211_handle_ht(local
, 1, &conf
->ht_conf
,
1682 ieee80211_bss_info_change_notify(sdata
, changed
);
1686 static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data
*sdata
,
1687 struct ieee80211_if_sta
*ifsta
,
1688 struct ieee80211_mgmt
*mgmt
,
1690 struct ieee80211_rx_status
*rx_status
)
1692 struct ieee80211_local
*local
= sdata
->local
;
1694 struct sk_buff
*skb
;
1695 struct ieee80211_mgmt
*resp
;
1697 DECLARE_MAC_BUF(mac
);
1698 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1699 DECLARE_MAC_BUF(mac2
);
1700 DECLARE_MAC_BUF(mac3
);
1703 if (sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
||
1704 ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
||
1705 len
< 24 + 2 || !ifsta
->probe_resp
)
1708 if (local
->ops
->tx_last_beacon
)
1709 tx_last_beacon
= local
->ops
->tx_last_beacon(local_to_hw(local
));
1713 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1714 printk(KERN_DEBUG
"%s: RX ProbeReq SA=%s DA=%s BSSID="
1715 "%s (tx_last_beacon=%d)\n",
1716 sdata
->dev
->name
, print_mac(mac
, mgmt
->sa
), print_mac(mac2
, mgmt
->da
),
1717 print_mac(mac3
, mgmt
->bssid
), tx_last_beacon
);
1718 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1720 if (!tx_last_beacon
)
1723 if (memcmp(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
) != 0 &&
1724 memcmp(mgmt
->bssid
, "\xff\xff\xff\xff\xff\xff", ETH_ALEN
) != 0)
1727 end
= ((u8
*) mgmt
) + len
;
1728 pos
= mgmt
->u
.probe_req
.variable
;
1729 if (pos
[0] != WLAN_EID_SSID
||
1730 pos
+ 2 + pos
[1] > end
) {
1731 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1732 printk(KERN_DEBUG
"%s: Invalid SSID IE in ProbeReq "
1734 sdata
->dev
->name
, print_mac(mac
, mgmt
->sa
));
1739 (pos
[1] != ifsta
->ssid_len
||
1740 memcmp(pos
+ 2, ifsta
->ssid
, ifsta
->ssid_len
) != 0)) {
1741 /* Ignore ProbeReq for foreign SSID */
1745 /* Reply with ProbeResp */
1746 skb
= skb_copy(ifsta
->probe_resp
, GFP_KERNEL
);
1750 resp
= (struct ieee80211_mgmt
*) skb
->data
;
1751 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
1752 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1753 printk(KERN_DEBUG
"%s: Sending ProbeResp to %s\n",
1754 sdata
->dev
->name
, print_mac(mac
, resp
->da
));
1755 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1756 ieee80211_tx_skb(sdata
, skb
, 0);
1759 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
,
1760 struct ieee80211_rx_status
*rx_status
)
1762 struct ieee80211_local
*local
= sdata
->local
;
1763 struct ieee80211_if_sta
*ifsta
;
1764 struct ieee80211_mgmt
*mgmt
;
1770 ifsta
= &sdata
->u
.sta
;
1772 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1773 fc
= le16_to_cpu(mgmt
->frame_control
);
1775 switch (fc
& IEEE80211_FCTL_STYPE
) {
1776 case IEEE80211_STYPE_PROBE_REQ
:
1777 case IEEE80211_STYPE_PROBE_RESP
:
1778 case IEEE80211_STYPE_BEACON
:
1779 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
1780 case IEEE80211_STYPE_AUTH
:
1781 case IEEE80211_STYPE_ASSOC_RESP
:
1782 case IEEE80211_STYPE_REASSOC_RESP
:
1783 case IEEE80211_STYPE_DEAUTH
:
1784 case IEEE80211_STYPE_DISASSOC
:
1785 skb_queue_tail(&ifsta
->skb_queue
, skb
);
1786 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
1794 static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1795 struct sk_buff
*skb
)
1797 struct ieee80211_rx_status
*rx_status
;
1798 struct ieee80211_if_sta
*ifsta
;
1799 struct ieee80211_mgmt
*mgmt
;
1802 ifsta
= &sdata
->u
.sta
;
1804 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1805 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1806 fc
= le16_to_cpu(mgmt
->frame_control
);
1808 switch (fc
& IEEE80211_FCTL_STYPE
) {
1809 case IEEE80211_STYPE_PROBE_REQ
:
1810 ieee80211_rx_mgmt_probe_req(sdata
, ifsta
, mgmt
, skb
->len
,
1813 case IEEE80211_STYPE_PROBE_RESP
:
1814 ieee80211_rx_mgmt_probe_resp(sdata
, mgmt
, skb
->len
, rx_status
);
1816 case IEEE80211_STYPE_BEACON
:
1817 ieee80211_rx_mgmt_beacon(sdata
, mgmt
, skb
->len
, rx_status
);
1819 case IEEE80211_STYPE_AUTH
:
1820 ieee80211_rx_mgmt_auth(sdata
, ifsta
, mgmt
, skb
->len
);
1822 case IEEE80211_STYPE_ASSOC_RESP
:
1823 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
, skb
->len
, 0);
1825 case IEEE80211_STYPE_REASSOC_RESP
:
1826 ieee80211_rx_mgmt_assoc_resp(sdata
, ifsta
, mgmt
, skb
->len
, 1);
1828 case IEEE80211_STYPE_DEAUTH
:
1829 ieee80211_rx_mgmt_deauth(sdata
, ifsta
, mgmt
, skb
->len
);
1831 case IEEE80211_STYPE_DISASSOC
:
1832 ieee80211_rx_mgmt_disassoc(sdata
, ifsta
, mgmt
, skb
->len
);
1840 static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data
*sdata
)
1842 struct ieee80211_local
*local
= sdata
->local
;
1844 struct sta_info
*sta
;
1848 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
1849 if (sta
->sdata
== sdata
&&
1850 time_after(sta
->last_rx
+ IEEE80211_IBSS_MERGE_INTERVAL
,
1863 static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data
*sdata
,
1864 struct ieee80211_if_sta
*ifsta
)
1866 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
1868 ieee80211_sta_expire(sdata
, IEEE80211_IBSS_INACTIVITY_LIMIT
);
1869 if (ieee80211_sta_active_ibss(sdata
))
1872 printk(KERN_DEBUG
"%s: No active IBSS STAs - trying to scan for other "
1873 "IBSS networks with same SSID (merge)\n", sdata
->dev
->name
);
1874 ieee80211_request_scan(sdata
, ifsta
->ssid
, ifsta
->ssid_len
);
1878 static void ieee80211_sta_timer(unsigned long data
)
1880 struct ieee80211_sub_if_data
*sdata
=
1881 (struct ieee80211_sub_if_data
*) data
;
1882 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1883 struct ieee80211_local
*local
= sdata
->local
;
1885 set_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
1886 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
1889 static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data
*sdata
,
1890 struct ieee80211_if_sta
*ifsta
)
1892 struct ieee80211_local
*local
= sdata
->local
;
1894 if (local
->ops
->reset_tsf
) {
1895 /* Reset own TSF to allow time synchronization work. */
1896 local
->ops
->reset_tsf(local_to_hw(local
));
1899 ifsta
->wmm_last_param_set
= -1; /* allow any WMM update */
1902 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1903 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
1904 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1905 ifsta
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
1906 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1907 ifsta
->auth_alg
= WLAN_AUTH_LEAP
;
1909 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
1910 ifsta
->auth_transaction
= -1;
1911 ifsta
->flags
&= ~IEEE80211_STA_ASSOCIATED
;
1912 ifsta
->assoc_scan_tries
= 0;
1913 ifsta
->direct_probe_tries
= 0;
1914 ifsta
->auth_tries
= 0;
1915 ifsta
->assoc_tries
= 0;
1916 netif_tx_stop_all_queues(sdata
->dev
);
1917 netif_carrier_off(sdata
->dev
);
1921 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta
*ifsta
,
1922 const char *ssid
, int ssid_len
)
1924 int tmp
, hidden_ssid
;
1926 if (ssid_len
== ifsta
->ssid_len
&&
1927 !memcmp(ifsta
->ssid
, ssid
, ssid_len
))
1930 if (ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
)
1936 if (ssid
[tmp
] != '\0') {
1942 if (hidden_ssid
&& ifsta
->ssid_len
== ssid_len
)
1945 if (ssid_len
== 1 && ssid
[0] == ' ')
1951 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data
*sdata
,
1952 struct ieee80211_if_sta
*ifsta
)
1954 struct ieee80211_local
*local
= sdata
->local
;
1955 struct ieee80211_bss
*bss
;
1956 struct ieee80211_supported_band
*sband
;
1957 u8 bssid
[ETH_ALEN
], *pos
;
1960 DECLARE_MAC_BUF(mac
);
1963 /* Easier testing, use fixed BSSID. */
1964 memset(bssid
, 0xfe, ETH_ALEN
);
1966 /* Generate random, not broadcast, locally administered BSSID. Mix in
1967 * own MAC address to make sure that devices that do not have proper
1968 * random number generator get different BSSID. */
1969 get_random_bytes(bssid
, ETH_ALEN
);
1970 for (i
= 0; i
< ETH_ALEN
; i
++)
1971 bssid
[i
] ^= sdata
->dev
->dev_addr
[i
];
1976 printk(KERN_DEBUG
"%s: Creating new IBSS network, BSSID %s\n",
1977 sdata
->dev
->name
, print_mac(mac
, bssid
));
1979 bss
= ieee80211_rx_bss_add(local
, bssid
,
1980 local
->hw
.conf
.channel
->center_freq
,
1981 sdata
->u
.sta
.ssid
, sdata
->u
.sta
.ssid_len
);
1985 bss
->band
= local
->hw
.conf
.channel
->band
;
1986 sband
= local
->hw
.wiphy
->bands
[bss
->band
];
1988 if (local
->hw
.conf
.beacon_int
== 0)
1989 local
->hw
.conf
.beacon_int
= 100;
1990 bss
->beacon_int
= local
->hw
.conf
.beacon_int
;
1991 bss
->last_update
= jiffies
;
1992 bss
->capability
= WLAN_CAPABILITY_IBSS
;
1994 if (sdata
->default_key
)
1995 bss
->capability
|= WLAN_CAPABILITY_PRIVACY
;
1997 sdata
->drop_unencrypted
= 0;
1999 bss
->supp_rates_len
= sband
->n_bitrates
;
2000 pos
= bss
->supp_rates
;
2001 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
2002 int rate
= sband
->bitrates
[i
].bitrate
;
2003 *pos
++ = (u8
) (rate
/ 5);
2006 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
2007 ieee80211_rx_bss_put(local
, bss
);
2012 static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data
*sdata
,
2013 struct ieee80211_if_sta
*ifsta
)
2015 struct ieee80211_local
*local
= sdata
->local
;
2016 struct ieee80211_bss
*bss
;
2020 DECLARE_MAC_BUF(mac
);
2021 DECLARE_MAC_BUF(mac2
);
2023 if (ifsta
->ssid_len
== 0)
2026 active_ibss
= ieee80211_sta_active_ibss(sdata
);
2027 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2028 printk(KERN_DEBUG
"%s: sta_find_ibss (active_ibss=%d)\n",
2029 sdata
->dev
->name
, active_ibss
);
2030 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2031 spin_lock_bh(&local
->bss_lock
);
2032 list_for_each_entry(bss
, &local
->bss_list
, list
) {
2033 if (ifsta
->ssid_len
!= bss
->ssid_len
||
2034 memcmp(ifsta
->ssid
, bss
->ssid
, bss
->ssid_len
) != 0
2035 || !(bss
->capability
& WLAN_CAPABILITY_IBSS
))
2037 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2038 printk(KERN_DEBUG
" bssid=%s found\n",
2039 print_mac(mac
, bss
->bssid
));
2040 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2041 memcpy(bssid
, bss
->bssid
, ETH_ALEN
);
2043 if (active_ibss
|| memcmp(bssid
, ifsta
->bssid
, ETH_ALEN
) != 0)
2046 spin_unlock_bh(&local
->bss_lock
);
2048 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2050 printk(KERN_DEBUG
" sta_find_ibss: selected %s current "
2051 "%s\n", print_mac(mac
, bssid
),
2052 print_mac(mac2
, ifsta
->bssid
));
2053 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2055 if (found
&& memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0) {
2059 if (ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
)
2060 search_freq
= bss
->freq
;
2062 search_freq
= local
->hw
.conf
.channel
->center_freq
;
2064 bss
= ieee80211_rx_bss_get(local
, bssid
, search_freq
,
2065 ifsta
->ssid
, ifsta
->ssid_len
);
2069 printk(KERN_DEBUG
"%s: Selected IBSS BSSID %s"
2070 " based on configured SSID\n",
2071 sdata
->dev
->name
, print_mac(mac
, bssid
));
2072 ret
= ieee80211_sta_join_ibss(sdata
, ifsta
, bss
);
2073 ieee80211_rx_bss_put(local
, bss
);
2078 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2079 printk(KERN_DEBUG
" did not try to join ibss\n");
2080 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2082 /* Selected IBSS not found in current scan results - try to scan */
2083 if (ifsta
->state
== IEEE80211_STA_MLME_IBSS_JOINED
&&
2084 !ieee80211_sta_active_ibss(sdata
)) {
2085 mod_timer(&ifsta
->timer
, jiffies
+
2086 IEEE80211_IBSS_MERGE_INTERVAL
);
2087 } else if (time_after(jiffies
, local
->last_scan_completed
+
2088 IEEE80211_SCAN_INTERVAL
)) {
2089 printk(KERN_DEBUG
"%s: Trigger new scan to find an IBSS to "
2090 "join\n", sdata
->dev
->name
);
2091 return ieee80211_request_scan(sdata
, ifsta
->ssid
,
2093 } else if (ifsta
->state
!= IEEE80211_STA_MLME_IBSS_JOINED
) {
2094 int interval
= IEEE80211_SCAN_INTERVAL
;
2096 if (time_after(jiffies
, ifsta
->ibss_join_req
+
2097 IEEE80211_IBSS_JOIN_TIMEOUT
)) {
2098 if ((ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) &&
2099 (!(local
->oper_channel
->flags
&
2100 IEEE80211_CHAN_NO_IBSS
)))
2101 return ieee80211_sta_create_ibss(sdata
, ifsta
);
2102 if (ifsta
->flags
& IEEE80211_STA_CREATE_IBSS
) {
2103 printk(KERN_DEBUG
"%s: IBSS not allowed on"
2104 " %d MHz\n", sdata
->dev
->name
,
2105 local
->hw
.conf
.channel
->center_freq
);
2108 /* No IBSS found - decrease scan interval and continue
2110 interval
= IEEE80211_SCAN_INTERVAL_SLOW
;
2113 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
2114 mod_timer(&ifsta
->timer
, jiffies
+ interval
);
2122 static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data
*sdata
,
2123 struct ieee80211_if_sta
*ifsta
)
2125 struct ieee80211_local
*local
= sdata
->local
;
2126 struct ieee80211_bss
*bss
, *selected
= NULL
;
2127 int top_rssi
= 0, freq
;
2129 spin_lock_bh(&local
->bss_lock
);
2130 freq
= local
->oper_channel
->center_freq
;
2131 list_for_each_entry(bss
, &local
->bss_list
, list
) {
2132 if (!(bss
->capability
& WLAN_CAPABILITY_ESS
))
2135 if ((ifsta
->flags
& (IEEE80211_STA_AUTO_SSID_SEL
|
2136 IEEE80211_STA_AUTO_BSSID_SEL
|
2137 IEEE80211_STA_AUTO_CHANNEL_SEL
)) &&
2138 (!!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
) ^
2139 !!sdata
->default_key
))
2142 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_CHANNEL_SEL
) &&
2146 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_BSSID_SEL
) &&
2147 memcmp(bss
->bssid
, ifsta
->bssid
, ETH_ALEN
))
2150 if (!(ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
) &&
2151 !ieee80211_sta_match_ssid(ifsta
, bss
->ssid
, bss
->ssid_len
))
2154 if (!selected
|| top_rssi
< bss
->signal
) {
2156 top_rssi
= bss
->signal
;
2160 atomic_inc(&selected
->users
);
2161 spin_unlock_bh(&local
->bss_lock
);
2164 ieee80211_set_freq(sdata
, selected
->freq
);
2165 if (!(ifsta
->flags
& IEEE80211_STA_SSID_SET
))
2166 ieee80211_sta_set_ssid(sdata
, selected
->ssid
,
2167 selected
->ssid_len
);
2168 ieee80211_sta_set_bssid(sdata
, selected
->bssid
);
2169 ieee80211_sta_def_wmm_params(sdata
, selected
);
2171 /* Send out direct probe if no probe resp was received or
2172 * the one we have is outdated
2174 if (!selected
->last_probe_resp
||
2175 time_after(jiffies
, selected
->last_probe_resp
2176 + IEEE80211_SCAN_RESULT_EXPIRE
))
2177 ifsta
->state
= IEEE80211_STA_MLME_DIRECT_PROBE
;
2179 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2181 ieee80211_rx_bss_put(local
, selected
);
2182 ieee80211_sta_reset_auth(sdata
, ifsta
);
2185 if (ifsta
->assoc_scan_tries
< IEEE80211_ASSOC_SCANS_MAX_TRIES
) {
2186 ifsta
->assoc_scan_tries
++;
2187 if (ifsta
->flags
& IEEE80211_STA_AUTO_SSID_SEL
)
2188 ieee80211_start_scan(sdata
, NULL
, 0);
2190 ieee80211_start_scan(sdata
, ifsta
->ssid
,
2192 ifsta
->state
= IEEE80211_STA_MLME_AUTHENTICATE
;
2193 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2195 ifsta
->state
= IEEE80211_STA_MLME_DISABLED
;
2201 static void ieee80211_sta_work(struct work_struct
*work
)
2203 struct ieee80211_sub_if_data
*sdata
=
2204 container_of(work
, struct ieee80211_sub_if_data
, u
.sta
.work
);
2205 struct ieee80211_local
*local
= sdata
->local
;
2206 struct ieee80211_if_sta
*ifsta
;
2207 struct sk_buff
*skb
;
2209 if (!netif_running(sdata
->dev
))
2212 if (local
->sw_scanning
|| local
->hw_scanning
)
2215 if (WARN_ON(sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2216 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
))
2218 ifsta
= &sdata
->u
.sta
;
2220 while ((skb
= skb_dequeue(&ifsta
->skb_queue
)))
2221 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
2223 if (ifsta
->state
!= IEEE80211_STA_MLME_DIRECT_PROBE
&&
2224 ifsta
->state
!= IEEE80211_STA_MLME_AUTHENTICATE
&&
2225 ifsta
->state
!= IEEE80211_STA_MLME_ASSOCIATE
&&
2226 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
)) {
2227 ieee80211_start_scan(sdata
, ifsta
->scan_ssid
,
2228 ifsta
->scan_ssid_len
);
2232 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
)) {
2233 if (ieee80211_sta_config_auth(sdata
, ifsta
))
2235 clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
2236 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
))
2239 switch (ifsta
->state
) {
2240 case IEEE80211_STA_MLME_DISABLED
:
2242 case IEEE80211_STA_MLME_DIRECT_PROBE
:
2243 ieee80211_direct_probe(sdata
, ifsta
);
2245 case IEEE80211_STA_MLME_AUTHENTICATE
:
2246 ieee80211_authenticate(sdata
, ifsta
);
2248 case IEEE80211_STA_MLME_ASSOCIATE
:
2249 ieee80211_associate(sdata
, ifsta
);
2251 case IEEE80211_STA_MLME_ASSOCIATED
:
2252 ieee80211_associated(sdata
, ifsta
);
2254 case IEEE80211_STA_MLME_IBSS_SEARCH
:
2255 ieee80211_sta_find_ibss(sdata
, ifsta
);
2257 case IEEE80211_STA_MLME_IBSS_JOINED
:
2258 ieee80211_sta_merge_ibss(sdata
, ifsta
);
2265 if (ieee80211_privacy_mismatch(sdata
, ifsta
)) {
2266 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2267 "mixed-cell disabled - disassociate\n", sdata
->dev
->name
);
2269 ieee80211_set_disassoc(sdata
, ifsta
, false, true,
2270 WLAN_REASON_UNSPECIFIED
);
2274 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data
*sdata
)
2276 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2277 queue_work(sdata
->local
->hw
.workqueue
,
2278 &sdata
->u
.sta
.work
);
2281 /* interface setup */
2282 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data
*sdata
)
2284 struct ieee80211_if_sta
*ifsta
;
2286 ifsta
= &sdata
->u
.sta
;
2287 INIT_WORK(&ifsta
->work
, ieee80211_sta_work
);
2288 setup_timer(&ifsta
->timer
, ieee80211_sta_timer
,
2289 (unsigned long) sdata
);
2290 skb_queue_head_init(&ifsta
->skb_queue
);
2292 ifsta
->capab
= WLAN_CAPABILITY_ESS
;
2293 ifsta
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
2294 IEEE80211_AUTH_ALG_SHARED_KEY
;
2295 ifsta
->flags
|= IEEE80211_STA_CREATE_IBSS
|
2296 IEEE80211_STA_AUTO_BSSID_SEL
|
2297 IEEE80211_STA_AUTO_CHANNEL_SEL
;
2298 if (ieee80211_num_regular_queues(&sdata
->local
->hw
) >= 4)
2299 ifsta
->flags
|= IEEE80211_STA_WMM_ENABLED
;
2303 * Add a new IBSS station, will also be called by the RX code when,
2304 * in IBSS mode, receiving a frame from a yet-unknown station, hence
2305 * must be callable in atomic context.
2307 struct sta_info
*ieee80211_ibss_add_sta(struct ieee80211_sub_if_data
*sdata
,
2308 struct sk_buff
*skb
, u8
*bssid
,
2309 u8
*addr
, u64 supp_rates
)
2311 struct ieee80211_local
*local
= sdata
->local
;
2312 struct sta_info
*sta
;
2313 DECLARE_MAC_BUF(mac
);
2314 int band
= local
->hw
.conf
.channel
->band
;
2316 /* TODO: Could consider removing the least recently used entry and
2317 * allow new one to be added. */
2318 if (local
->num_sta
>= IEEE80211_IBSS_MAX_STA_ENTRIES
) {
2319 if (net_ratelimit()) {
2320 printk(KERN_DEBUG
"%s: No room for a new IBSS STA "
2321 "entry %s\n", sdata
->dev
->name
, print_mac(mac
, addr
));
2326 if (compare_ether_addr(bssid
, sdata
->u
.sta
.bssid
))
2329 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2330 printk(KERN_DEBUG
"%s: Adding new IBSS station %s (dev=%s)\n",
2331 wiphy_name(local
->hw
.wiphy
), print_mac(mac
, addr
), sdata
->dev
->name
);
2334 sta
= sta_info_alloc(sdata
, addr
, GFP_ATOMIC
);
2338 set_sta_flags(sta
, WLAN_STA_AUTHORIZED
);
2340 /* make sure mandatory rates are always added */
2341 sta
->supp_rates
[band
] = supp_rates
|
2342 ieee80211_mandatory_rates(local
, band
);
2344 rate_control_rate_init(sta
, local
);
2346 if (sta_info_insert(sta
))
2352 /* configuration hooks */
2353 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data
*sdata
,
2354 struct ieee80211_if_sta
*ifsta
)
2356 struct ieee80211_local
*local
= sdata
->local
;
2358 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2361 if ((ifsta
->flags
& (IEEE80211_STA_BSSID_SET
|
2362 IEEE80211_STA_AUTO_BSSID_SEL
)) &&
2363 (ifsta
->flags
& (IEEE80211_STA_SSID_SET
|
2364 IEEE80211_STA_AUTO_SSID_SEL
))) {
2366 if (ifsta
->state
== IEEE80211_STA_MLME_ASSOCIATED
)
2367 ieee80211_set_disassoc(sdata
, ifsta
, true, true,
2368 WLAN_REASON_DEAUTH_LEAVING
);
2370 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2371 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2375 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t len
)
2377 struct ieee80211_if_sta
*ifsta
;
2380 if (len
> IEEE80211_MAX_SSID_LEN
)
2383 ifsta
= &sdata
->u
.sta
;
2385 if (ifsta
->ssid_len
!= len
|| memcmp(ifsta
->ssid
, ssid
, len
) != 0) {
2386 memset(ifsta
->ssid
, 0, sizeof(ifsta
->ssid
));
2387 memcpy(ifsta
->ssid
, ssid
, len
);
2388 ifsta
->ssid_len
= len
;
2389 ifsta
->flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
2393 * Hack! MLME code needs to be cleaned up to have different
2394 * entry points for configuration and internal selection change
2396 if (netif_running(sdata
->dev
))
2397 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_SSID
);
2399 printk(KERN_DEBUG
"%s: Failed to config new SSID to "
2400 "the low-level driver\n", sdata
->dev
->name
);
2406 ifsta
->flags
|= IEEE80211_STA_SSID_SET
;
2408 ifsta
->flags
&= ~IEEE80211_STA_SSID_SET
;
2410 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
2411 !(ifsta
->flags
& IEEE80211_STA_BSSID_SET
)) {
2412 ifsta
->ibss_join_req
= jiffies
;
2413 ifsta
->state
= IEEE80211_STA_MLME_IBSS_SEARCH
;
2414 return ieee80211_sta_find_ibss(sdata
, ifsta
);
2420 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data
*sdata
, char *ssid
, size_t *len
)
2422 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2423 memcpy(ssid
, ifsta
->ssid
, ifsta
->ssid_len
);
2424 *len
= ifsta
->ssid_len
;
2428 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data
*sdata
, u8
*bssid
)
2430 struct ieee80211_if_sta
*ifsta
;
2433 ifsta
= &sdata
->u
.sta
;
2435 if (memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0) {
2436 memcpy(ifsta
->bssid
, bssid
, ETH_ALEN
);
2439 * Hack! See also ieee80211_sta_set_ssid.
2441 if (netif_running(sdata
->dev
))
2442 res
= ieee80211_if_config(sdata
, IEEE80211_IFCC_BSSID
);
2444 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2445 "the low-level driver\n", sdata
->dev
->name
);
2450 if (is_valid_ether_addr(bssid
))
2451 ifsta
->flags
|= IEEE80211_STA_BSSID_SET
;
2453 ifsta
->flags
&= ~IEEE80211_STA_BSSID_SET
;
2458 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data
*sdata
, char *ie
, size_t len
)
2460 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2462 kfree(ifsta
->extra_ie
);
2464 ifsta
->extra_ie
= NULL
;
2465 ifsta
->extra_ie_len
= 0;
2468 ifsta
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
2469 if (!ifsta
->extra_ie
) {
2470 ifsta
->extra_ie_len
= 0;
2473 memcpy(ifsta
->extra_ie
, ie
, len
);
2474 ifsta
->extra_ie_len
= len
;
2478 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2480 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2482 printk(KERN_DEBUG
"%s: deauthenticating by local choice (reason=%d)\n",
2483 sdata
->dev
->name
, reason
);
2485 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
&&
2486 sdata
->vif
.type
!= NL80211_IFTYPE_ADHOC
)
2489 ieee80211_set_disassoc(sdata
, ifsta
, true, true, reason
);
2493 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data
*sdata
, u16 reason
)
2495 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2497 printk(KERN_DEBUG
"%s: disassociating by local choice (reason=%d)\n",
2498 sdata
->dev
->name
, reason
);
2500 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2503 if (!(ifsta
->flags
& IEEE80211_STA_ASSOCIATED
))
2506 ieee80211_set_disassoc(sdata
, ifsta
, false, true, reason
);
2510 /* scan finished notification */
2511 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local
*local
)
2513 struct ieee80211_sub_if_data
*sdata
= local
->scan_sdata
;
2514 struct ieee80211_if_sta
*ifsta
;
2516 if (sdata
&& sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
2517 ifsta
= &sdata
->u
.sta
;
2518 if (!(ifsta
->flags
& IEEE80211_STA_BSSID_SET
) ||
2519 (!(ifsta
->state
== IEEE80211_STA_MLME_IBSS_JOINED
) &&
2520 !ieee80211_sta_active_ibss(sdata
)))
2521 ieee80211_sta_find_ibss(sdata
, ifsta
);
2524 /* Restart STA timers */
2526 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
2527 ieee80211_restart_sta_timer(sdata
);
2531 /* driver notification call */
2532 void ieee80211_notify_mac(struct ieee80211_hw
*hw
,
2533 enum ieee80211_notification_types notif_type
)
2535 struct ieee80211_local
*local
= hw_to_local(hw
);
2536 struct ieee80211_sub_if_data
*sdata
;
2538 switch (notif_type
) {
2539 case IEEE80211_NOTIFY_RE_ASSOC
:
2541 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
2542 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
2545 ieee80211_sta_req_auth(sdata
, &sdata
->u
.sta
);
2551 EXPORT_SYMBOL(ieee80211_notify_mac
);