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.
15 * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs
16 * order BSS list by RSSI(?) ("quality of AP")
17 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
20 #include <linux/delay.h>
21 #include <linux/if_ether.h>
22 #include <linux/skbuff.h>
23 #include <linux/netdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/wireless.h>
26 #include <linux/random.h>
27 #include <linux/etherdevice.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
33 #include "ieee80211_rate.h"
34 #include "hostapd_ioctl.h"
36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
37 #define IEEE80211_AUTH_MAX_TRIES 3
38 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
40 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
41 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
42 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
43 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
44 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
45 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
47 #define IEEE80211_PROBE_DELAY (HZ / 33)
48 #define IEEE80211_CHANNEL_TIME (HZ / 33)
49 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
50 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
51 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
52 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
54 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
57 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
59 #define ERP_INFO_USE_PROTECTION BIT(1)
61 static void ieee80211_send_probe_req(struct net_device
*dev
, u8
*dst
,
62 u8
*ssid
, size_t ssid_len
);
63 static struct ieee80211_sta_bss
*
64 ieee80211_rx_bss_get(struct net_device
*dev
, u8
*bssid
);
65 static void ieee80211_rx_bss_put(struct net_device
*dev
,
66 struct ieee80211_sta_bss
*bss
);
67 static int ieee80211_sta_find_ibss(struct net_device
*dev
,
68 struct ieee80211_if_sta
*ifsta
);
69 static int ieee80211_sta_wep_configured(struct net_device
*dev
);
70 static int ieee80211_sta_start_scan(struct net_device
*dev
,
71 u8
*ssid
, size_t ssid_len
);
72 static int ieee80211_sta_config_auth(struct net_device
*dev
,
73 struct ieee80211_if_sta
*ifsta
);
76 /* Parsed Information Elements */
77 struct ieee802_11_elems
{
94 /* length of them, respectively */
106 u8 ext_supp_rates_len
;
111 typedef enum { ParseOK
= 0, ParseUnknown
= 1, ParseFailed
= -1 } ParseRes
;
114 static ParseRes
ieee802_11_parse_elems(u8
*start
, size_t len
,
115 struct ieee802_11_elems
*elems
)
121 memset(elems
, 0, sizeof(*elems
));
133 printk(KERN_DEBUG
"IEEE 802.11 element parse "
134 "failed (id=%d elen=%d left=%d)\n",
143 elems
->ssid_len
= elen
;
145 case WLAN_EID_SUPP_RATES
:
146 elems
->supp_rates
= pos
;
147 elems
->supp_rates_len
= elen
;
149 case WLAN_EID_FH_PARAMS
:
150 elems
->fh_params
= pos
;
151 elems
->fh_params_len
= elen
;
153 case WLAN_EID_DS_PARAMS
:
154 elems
->ds_params
= pos
;
155 elems
->ds_params_len
= elen
;
157 case WLAN_EID_CF_PARAMS
:
158 elems
->cf_params
= pos
;
159 elems
->cf_params_len
= elen
;
163 elems
->tim_len
= elen
;
165 case WLAN_EID_IBSS_PARAMS
:
166 elems
->ibss_params
= pos
;
167 elems
->ibss_params_len
= elen
;
169 case WLAN_EID_CHALLENGE
:
170 elems
->challenge
= pos
;
171 elems
->challenge_len
= elen
;
174 if (elen
>= 4 && pos
[0] == 0x00 && pos
[1] == 0x50 &&
176 /* Microsoft OUI (00:50:F2) */
178 /* OUI Type 1 - WPA IE */
180 elems
->wpa_len
= elen
;
181 } else if (elen
>= 5 && pos
[3] == 2) {
183 elems
->wmm_info
= pos
;
184 elems
->wmm_info_len
= elen
;
185 } else if (pos
[4] == 1) {
186 elems
->wmm_param
= pos
;
187 elems
->wmm_param_len
= elen
;
194 elems
->rsn_len
= elen
;
196 case WLAN_EID_ERP_INFO
:
197 elems
->erp_info
= pos
;
198 elems
->erp_info_len
= elen
;
200 case WLAN_EID_EXT_SUPP_RATES
:
201 elems
->ext_supp_rates
= pos
;
202 elems
->ext_supp_rates_len
= elen
;
206 printk(KERN_DEBUG
"IEEE 802.11 element parse ignored "
207 "unknown element (id=%d elen=%d)\n",
218 /* Do not trigger error if left == 1 as Apple Airport base stations
219 * send AssocResps that are one spurious byte too long. */
221 return unknown
? ParseUnknown
: ParseOK
;
227 static int ecw2cw(int ecw
)
238 static void ieee80211_sta_wmm_params(struct net_device
*dev
,
239 struct ieee80211_if_sta
*ifsta
,
240 u8
*wmm_param
, size_t wmm_param_len
)
242 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
243 struct ieee80211_tx_queue_params params
;
248 if (wmm_param_len
< 8 || wmm_param
[5] /* version */ != 1)
250 count
= wmm_param
[6] & 0x0f;
251 if (count
== ifsta
->wmm_last_param_set
)
253 ifsta
->wmm_last_param_set
= count
;
256 left
= wmm_param_len
- 8;
258 memset(¶ms
, 0, sizeof(params
));
260 if (!local
->ops
->conf_tx
)
264 for (; left
>= 4; left
-= 4, pos
+= 4) {
265 int aci
= (pos
[0] >> 5) & 0x03;
266 int acm
= (pos
[0] >> 4) & 0x01;
271 queue
= IEEE80211_TX_QUEUE_DATA3
;
273 local
->wmm_acm
|= BIT(0) | BIT(3);
277 queue
= IEEE80211_TX_QUEUE_DATA1
;
279 local
->wmm_acm
|= BIT(4) | BIT(5);
283 queue
= IEEE80211_TX_QUEUE_DATA0
;
285 local
->wmm_acm
|= BIT(6) | BIT(7);
290 queue
= IEEE80211_TX_QUEUE_DATA2
;
292 local
->wmm_acm
|= BIT(1) | BIT(2);
297 params
.aifs
= pos
[0] & 0x0f;
298 params
.cw_max
= ecw2cw((pos
[1] & 0xf0) >> 4);
299 params
.cw_min
= ecw2cw(pos
[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params
.burst_time
= (pos
[2] | (pos
[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG
"%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev
->name
, queue
, aci
, acm
, params
.aifs
, params
.cw_min
,
305 params
.cw_max
, params
.burst_time
);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
308 if (local
->ops
->conf_tx(local_to_hw(local
), queue
, ¶ms
)) {
309 printk(KERN_DEBUG
"%s: failed to set TX queue "
310 "parameters for queue %d\n", dev
->name
, queue
);
316 static void ieee80211_handle_erp_ie(struct net_device
*dev
, u8 erp_value
)
318 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
319 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
320 int use_protection
= (erp_value
& WLAN_ERP_USE_PROTECTION
) != 0;
321 int preamble_mode
= (erp_value
& WLAN_ERP_BARKER_PREAMBLE
) != 0;
324 if (use_protection
!= sdata
->use_protection
) {
325 if (net_ratelimit()) {
326 printk(KERN_DEBUG
"%s: CTS protection %s (BSSID="
329 use_protection
? "enabled" : "disabled",
330 MAC_ARG(ifsta
->bssid
));
332 sdata
->use_protection
= use_protection
;
333 changes
|= IEEE80211_ERP_CHANGE_PROTECTION
;
336 if (!preamble_mode
!= sdata
->short_preamble
) {
337 if (net_ratelimit()) {
338 printk(KERN_DEBUG
"%s: switched to %s barker preamble"
339 " (BSSID=" MAC_FMT
")\n",
341 (preamble_mode
== WLAN_ERP_PREAMBLE_SHORT
) ?
343 MAC_ARG(ifsta
->bssid
));
345 sdata
->short_preamble
= !preamble_mode
;
346 changes
|= IEEE80211_ERP_CHANGE_PREAMBLE
;
350 ieee80211_erp_info_change_notify(dev
, changes
);
354 static void ieee80211_sta_send_associnfo(struct net_device
*dev
,
355 struct ieee80211_if_sta
*ifsta
)
360 union iwreq_data wrqu
;
362 if (!ifsta
->assocreq_ies
&& !ifsta
->assocresp_ies
)
365 buf
= kmalloc(50 + 2 * (ifsta
->assocreq_ies_len
+
366 ifsta
->assocresp_ies_len
), GFP_KERNEL
);
370 len
= sprintf(buf
, "ASSOCINFO(");
371 if (ifsta
->assocreq_ies
) {
372 len
+= sprintf(buf
+ len
, "ReqIEs=");
373 for (i
= 0; i
< ifsta
->assocreq_ies_len
; i
++) {
374 len
+= sprintf(buf
+ len
, "%02x",
375 ifsta
->assocreq_ies
[i
]);
378 if (ifsta
->assocresp_ies
) {
379 if (ifsta
->assocreq_ies
)
380 len
+= sprintf(buf
+ len
, " ");
381 len
+= sprintf(buf
+ len
, "RespIEs=");
382 for (i
= 0; i
< ifsta
->assocresp_ies_len
; i
++) {
383 len
+= sprintf(buf
+ len
, "%02x",
384 ifsta
->assocresp_ies
[i
]);
387 len
+= sprintf(buf
+ len
, ")");
389 if (len
> IW_CUSTOM_MAX
) {
390 len
= sprintf(buf
, "ASSOCRESPIE=");
391 for (i
= 0; i
< ifsta
->assocresp_ies_len
; i
++) {
392 len
+= sprintf(buf
+ len
, "%02x",
393 ifsta
->assocresp_ies
[i
]);
397 memset(&wrqu
, 0, sizeof(wrqu
));
398 wrqu
.data
.length
= len
;
399 wireless_send_event(dev
, IWEVCUSTOM
, &wrqu
, buf
);
405 static void ieee80211_set_associated(struct net_device
*dev
,
406 struct ieee80211_if_sta
*ifsta
, int assoc
)
408 union iwreq_data wrqu
;
410 if (ifsta
->associated
== assoc
)
413 ifsta
->associated
= assoc
;
416 struct ieee80211_sub_if_data
*sdata
;
417 struct ieee80211_sta_bss
*bss
;
418 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
419 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
)
422 bss
= ieee80211_rx_bss_get(dev
, ifsta
->bssid
);
424 if (bss
->has_erp_value
)
425 ieee80211_handle_erp_ie(dev
, bss
->erp_value
);
426 ieee80211_rx_bss_put(dev
, bss
);
429 netif_carrier_on(dev
);
430 ifsta
->prev_bssid_set
= 1;
431 memcpy(ifsta
->prev_bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
432 memcpy(wrqu
.ap_addr
.sa_data
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
433 ieee80211_sta_send_associnfo(dev
, ifsta
);
435 netif_carrier_off(dev
);
436 ieee80211_reset_erp_info(dev
);
437 memset(wrqu
.ap_addr
.sa_data
, 0, ETH_ALEN
);
439 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
440 wireless_send_event(dev
, SIOCGIWAP
, &wrqu
, NULL
);
441 ifsta
->last_probe
= jiffies
;
444 static void ieee80211_set_disassoc(struct net_device
*dev
,
445 struct ieee80211_if_sta
*ifsta
, int deauth
)
448 ifsta
->auth_tries
= 0;
449 ifsta
->assoc_tries
= 0;
450 ieee80211_set_associated(dev
, ifsta
, 0);
453 static void ieee80211_sta_tx(struct net_device
*dev
, struct sk_buff
*skb
,
456 struct ieee80211_sub_if_data
*sdata
;
457 struct ieee80211_tx_packet_data
*pkt_data
;
459 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
460 skb
->dev
= sdata
->local
->mdev
;
461 skb_set_mac_header(skb
, 0);
462 skb_set_network_header(skb
, 0);
463 skb_set_transport_header(skb
, 0);
465 pkt_data
= (struct ieee80211_tx_packet_data
*) skb
->cb
;
466 memset(pkt_data
, 0, sizeof(struct ieee80211_tx_packet_data
));
467 pkt_data
->ifindex
= sdata
->dev
->ifindex
;
468 pkt_data
->mgmt_iface
= (sdata
->type
== IEEE80211_IF_TYPE_MGMT
);
469 pkt_data
->do_not_encrypt
= !encrypt
;
475 static void ieee80211_send_auth(struct net_device
*dev
,
476 struct ieee80211_if_sta
*ifsta
,
477 int transaction
, u8
*extra
, size_t extra_len
,
480 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
482 struct ieee80211_mgmt
*mgmt
;
484 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
485 sizeof(*mgmt
) + 6 + extra_len
);
487 printk(KERN_DEBUG
"%s: failed to allocate buffer for auth "
488 "frame\n", dev
->name
);
491 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
493 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24 + 6);
494 memset(mgmt
, 0, 24 + 6);
495 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
496 IEEE80211_STYPE_AUTH
);
498 mgmt
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
499 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
500 memcpy(mgmt
->sa
, dev
->dev_addr
, ETH_ALEN
);
501 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
502 mgmt
->u
.auth
.auth_alg
= cpu_to_le16(ifsta
->auth_alg
);
503 mgmt
->u
.auth
.auth_transaction
= cpu_to_le16(transaction
);
504 ifsta
->auth_transaction
= transaction
+ 1;
505 mgmt
->u
.auth
.status_code
= cpu_to_le16(0);
507 memcpy(skb_put(skb
, extra_len
), extra
, extra_len
);
509 ieee80211_sta_tx(dev
, skb
, encrypt
);
513 static void ieee80211_authenticate(struct net_device
*dev
,
514 struct ieee80211_if_sta
*ifsta
)
517 if (ifsta
->auth_tries
> IEEE80211_AUTH_MAX_TRIES
) {
518 printk(KERN_DEBUG
"%s: authentication with AP " MAC_FMT
520 dev
->name
, MAC_ARG(ifsta
->bssid
));
521 ifsta
->state
= IEEE80211_DISABLED
;
525 ifsta
->state
= IEEE80211_AUTHENTICATE
;
526 printk(KERN_DEBUG
"%s: authenticate with AP " MAC_FMT
"\n",
527 dev
->name
, MAC_ARG(ifsta
->bssid
));
529 ieee80211_send_auth(dev
, ifsta
, 1, NULL
, 0, 0);
531 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_AUTH_TIMEOUT
);
535 static void ieee80211_send_assoc(struct net_device
*dev
,
536 struct ieee80211_if_sta
*ifsta
)
538 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
539 struct ieee80211_hw_mode
*mode
;
541 struct ieee80211_mgmt
*mgmt
;
545 struct ieee80211_sta_bss
*bss
;
548 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
549 sizeof(*mgmt
) + 200 + ifsta
->extra_ie_len
+
552 printk(KERN_DEBUG
"%s: failed to allocate buffer for assoc "
553 "frame\n", dev
->name
);
556 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
558 mode
= local
->oper_hw_mode
;
559 capab
= ifsta
->capab
;
560 if (mode
->mode
== MODE_IEEE80211G
) {
561 capab
|= WLAN_CAPABILITY_SHORT_SLOT_TIME
|
562 WLAN_CAPABILITY_SHORT_PREAMBLE
;
564 bss
= ieee80211_rx_bss_get(dev
, ifsta
->bssid
);
566 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
567 capab
|= WLAN_CAPABILITY_PRIVACY
;
571 ieee80211_rx_bss_put(dev
, bss
);
574 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
576 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
577 memcpy(mgmt
->sa
, dev
->dev_addr
, ETH_ALEN
);
578 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
580 if (ifsta
->prev_bssid_set
) {
582 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
583 IEEE80211_STYPE_REASSOC_REQ
);
584 mgmt
->u
.reassoc_req
.capab_info
= cpu_to_le16(capab
);
585 mgmt
->u
.reassoc_req
.listen_interval
= cpu_to_le16(1);
586 memcpy(mgmt
->u
.reassoc_req
.current_ap
, ifsta
->prev_bssid
,
590 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
591 IEEE80211_STYPE_ASSOC_REQ
);
592 mgmt
->u
.assoc_req
.capab_info
= cpu_to_le16(capab
);
593 mgmt
->u
.assoc_req
.listen_interval
= cpu_to_le16(1);
597 ies
= pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
598 *pos
++ = WLAN_EID_SSID
;
599 *pos
++ = ifsta
->ssid_len
;
600 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
602 len
= mode
->num_rates
;
605 pos
= skb_put(skb
, len
+ 2);
606 *pos
++ = WLAN_EID_SUPP_RATES
;
608 for (i
= 0; i
< len
; i
++) {
609 int rate
= mode
->rates
[i
].rate
;
610 if (mode
->mode
== MODE_ATHEROS_TURBO
)
612 *pos
++ = (u8
) (rate
/ 5);
615 if (mode
->num_rates
> len
) {
616 pos
= skb_put(skb
, mode
->num_rates
- len
+ 2);
617 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
618 *pos
++ = mode
->num_rates
- len
;
619 for (i
= len
; i
< mode
->num_rates
; i
++) {
620 int rate
= mode
->rates
[i
].rate
;
621 if (mode
->mode
== MODE_ATHEROS_TURBO
)
623 *pos
++ = (u8
) (rate
/ 5);
627 if (ifsta
->extra_ie
) {
628 pos
= skb_put(skb
, ifsta
->extra_ie_len
);
629 memcpy(pos
, ifsta
->extra_ie
, ifsta
->extra_ie_len
);
632 if (wmm
&& ifsta
->wmm_enabled
) {
633 pos
= skb_put(skb
, 9);
634 *pos
++ = WLAN_EID_VENDOR_SPECIFIC
;
635 *pos
++ = 7; /* len */
636 *pos
++ = 0x00; /* Microsoft OUI 00:50:F2 */
639 *pos
++ = 2; /* WME */
640 *pos
++ = 0; /* WME info */
641 *pos
++ = 1; /* WME ver */
645 kfree(ifsta
->assocreq_ies
);
646 ifsta
->assocreq_ies_len
= (skb
->data
+ skb
->len
) - ies
;
647 ifsta
->assocreq_ies
= kmalloc(ifsta
->assocreq_ies_len
, GFP_KERNEL
);
648 if (ifsta
->assocreq_ies
)
649 memcpy(ifsta
->assocreq_ies
, ies
, ifsta
->assocreq_ies_len
);
651 ieee80211_sta_tx(dev
, skb
, 0);
655 static void ieee80211_send_deauth(struct net_device
*dev
,
656 struct ieee80211_if_sta
*ifsta
, u16 reason
)
658 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
660 struct ieee80211_mgmt
*mgmt
;
662 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
664 printk(KERN_DEBUG
"%s: failed to allocate buffer for deauth "
665 "frame\n", dev
->name
);
668 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
670 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
672 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
673 memcpy(mgmt
->sa
, dev
->dev_addr
, ETH_ALEN
);
674 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
675 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
676 IEEE80211_STYPE_DEAUTH
);
678 mgmt
->u
.deauth
.reason_code
= cpu_to_le16(reason
);
680 ieee80211_sta_tx(dev
, skb
, 0);
684 static void ieee80211_send_disassoc(struct net_device
*dev
,
685 struct ieee80211_if_sta
*ifsta
, u16 reason
)
687 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
689 struct ieee80211_mgmt
*mgmt
;
691 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
));
693 printk(KERN_DEBUG
"%s: failed to allocate buffer for disassoc "
694 "frame\n", dev
->name
);
697 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
699 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
701 memcpy(mgmt
->da
, ifsta
->bssid
, ETH_ALEN
);
702 memcpy(mgmt
->sa
, dev
->dev_addr
, ETH_ALEN
);
703 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
704 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
705 IEEE80211_STYPE_DISASSOC
);
707 mgmt
->u
.disassoc
.reason_code
= cpu_to_le16(reason
);
709 ieee80211_sta_tx(dev
, skb
, 0);
713 static int ieee80211_privacy_mismatch(struct net_device
*dev
,
714 struct ieee80211_if_sta
*ifsta
)
716 struct ieee80211_sta_bss
*bss
;
719 if (!ifsta
|| ifsta
->mixed_cell
||
720 ifsta
->key_mgmt
!= IEEE80211_KEY_MGMT_NONE
)
723 bss
= ieee80211_rx_bss_get(dev
, ifsta
->bssid
);
727 if (ieee80211_sta_wep_configured(dev
) !=
728 !!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
))
731 ieee80211_rx_bss_put(dev
, bss
);
737 static void ieee80211_associate(struct net_device
*dev
,
738 struct ieee80211_if_sta
*ifsta
)
740 ifsta
->assoc_tries
++;
741 if (ifsta
->assoc_tries
> IEEE80211_ASSOC_MAX_TRIES
) {
742 printk(KERN_DEBUG
"%s: association with AP " MAC_FMT
744 dev
->name
, MAC_ARG(ifsta
->bssid
));
745 ifsta
->state
= IEEE80211_DISABLED
;
749 ifsta
->state
= IEEE80211_ASSOCIATE
;
750 printk(KERN_DEBUG
"%s: associate with AP " MAC_FMT
"\n",
751 dev
->name
, MAC_ARG(ifsta
->bssid
));
752 if (ieee80211_privacy_mismatch(dev
, ifsta
)) {
753 printk(KERN_DEBUG
"%s: mismatch in privacy configuration and "
754 "mixed-cell disabled - abort association\n", dev
->name
);
755 ifsta
->state
= IEEE80211_DISABLED
;
759 ieee80211_send_assoc(dev
, ifsta
);
761 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_ASSOC_TIMEOUT
);
765 static void ieee80211_associated(struct net_device
*dev
,
766 struct ieee80211_if_sta
*ifsta
)
768 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
769 struct sta_info
*sta
;
772 /* TODO: start monitoring current AP signal quality and number of
773 * missed beacons. Scan other channels every now and then and search
775 /* TODO: remove expired BSSes */
777 ifsta
->state
= IEEE80211_ASSOCIATED
;
779 sta
= sta_info_get(local
, ifsta
->bssid
);
781 printk(KERN_DEBUG
"%s: No STA entry for own AP " MAC_FMT
"\n",
782 dev
->name
, MAC_ARG(ifsta
->bssid
));
786 if (time_after(jiffies
,
787 sta
->last_rx
+ IEEE80211_MONITORING_INTERVAL
)) {
788 if (ifsta
->probereq_poll
) {
789 printk(KERN_DEBUG
"%s: No ProbeResp from "
790 "current AP " MAC_FMT
" - assume out of "
792 dev
->name
, MAC_ARG(ifsta
->bssid
));
795 ifsta
->probereq_poll
= 0;
797 ieee80211_send_probe_req(dev
, ifsta
->bssid
,
799 local
->scan_ssid_len
);
800 ifsta
->probereq_poll
= 1;
803 ifsta
->probereq_poll
= 0;
804 if (time_after(jiffies
, ifsta
->last_probe
+
805 IEEE80211_PROBE_INTERVAL
)) {
806 ifsta
->last_probe
= jiffies
;
807 ieee80211_send_probe_req(dev
, ifsta
->bssid
,
815 union iwreq_data wrqu
;
816 memset(wrqu
.ap_addr
.sa_data
, 0, ETH_ALEN
);
817 wrqu
.ap_addr
.sa_family
= ARPHRD_ETHER
;
818 wireless_send_event(dev
, SIOCGIWAP
, &wrqu
, NULL
);
819 mod_timer(&ifsta
->timer
, jiffies
+
820 IEEE80211_MONITORING_INTERVAL
+ 30 * HZ
);
822 mod_timer(&ifsta
->timer
, jiffies
+
823 IEEE80211_MONITORING_INTERVAL
);
828 static void ieee80211_send_probe_req(struct net_device
*dev
, u8
*dst
,
829 u8
*ssid
, size_t ssid_len
)
831 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
832 struct ieee80211_hw_mode
*mode
;
834 struct ieee80211_mgmt
*mgmt
;
835 u8
*pos
, *supp_rates
, *esupp_rates
= NULL
;
838 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ sizeof(*mgmt
) + 200);
840 printk(KERN_DEBUG
"%s: failed to allocate buffer for probe "
841 "request\n", dev
->name
);
844 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
846 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, 24);
848 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
849 IEEE80211_STYPE_PROBE_REQ
);
850 memcpy(mgmt
->sa
, dev
->dev_addr
, ETH_ALEN
);
852 memcpy(mgmt
->da
, dst
, ETH_ALEN
);
853 memcpy(mgmt
->bssid
, dst
, ETH_ALEN
);
855 memset(mgmt
->da
, 0xff, ETH_ALEN
);
856 memset(mgmt
->bssid
, 0xff, ETH_ALEN
);
858 pos
= skb_put(skb
, 2 + ssid_len
);
859 *pos
++ = WLAN_EID_SSID
;
861 memcpy(pos
, ssid
, ssid_len
);
863 supp_rates
= skb_put(skb
, 2);
864 supp_rates
[0] = WLAN_EID_SUPP_RATES
;
866 mode
= local
->oper_hw_mode
;
867 for (i
= 0; i
< mode
->num_rates
; i
++) {
868 struct ieee80211_rate
*rate
= &mode
->rates
[i
];
869 if (!(rate
->flags
& IEEE80211_RATE_SUPPORTED
))
872 pos
= skb_put(skb
, 1);
874 } else if (supp_rates
[1] == 8) {
875 esupp_rates
= skb_put(skb
, 3);
876 esupp_rates
[0] = WLAN_EID_EXT_SUPP_RATES
;
878 pos
= &esupp_rates
[2];
880 pos
= skb_put(skb
, 1);
883 if (mode
->mode
== MODE_ATHEROS_TURBO
)
884 *pos
= rate
->rate
/ 10;
886 *pos
= rate
->rate
/ 5;
889 ieee80211_sta_tx(dev
, skb
, 0);
893 static int ieee80211_sta_wep_configured(struct net_device
*dev
)
895 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
896 if (!sdata
|| !sdata
->default_key
||
897 sdata
->default_key
->alg
!= ALG_WEP
)
903 static void ieee80211_auth_completed(struct net_device
*dev
,
904 struct ieee80211_if_sta
*ifsta
)
906 printk(KERN_DEBUG
"%s: authenticated\n", dev
->name
);
907 ifsta
->authenticated
= 1;
908 ieee80211_associate(dev
, ifsta
);
912 static void ieee80211_auth_challenge(struct net_device
*dev
,
913 struct ieee80211_if_sta
*ifsta
,
914 struct ieee80211_mgmt
*mgmt
,
918 struct ieee802_11_elems elems
;
920 printk(KERN_DEBUG
"%s: replying to auth challenge\n", dev
->name
);
921 pos
= mgmt
->u
.auth
.variable
;
922 if (ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
)
924 printk(KERN_DEBUG
"%s: failed to parse Auth(challenge)\n",
928 if (!elems
.challenge
) {
929 printk(KERN_DEBUG
"%s: no challenge IE in shared key auth "
930 "frame\n", dev
->name
);
933 ieee80211_send_auth(dev
, ifsta
, 3, elems
.challenge
- 2,
934 elems
.challenge_len
+ 2, 1);
938 static void ieee80211_rx_mgmt_auth(struct net_device
*dev
,
939 struct ieee80211_if_sta
*ifsta
,
940 struct ieee80211_mgmt
*mgmt
,
943 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
944 u16 auth_alg
, auth_transaction
, status_code
;
946 if (ifsta
->state
!= IEEE80211_AUTHENTICATE
&&
947 sdata
->type
!= IEEE80211_IF_TYPE_IBSS
) {
948 printk(KERN_DEBUG
"%s: authentication frame received from "
949 MAC_FMT
", but not in authenticate state - ignored\n",
950 dev
->name
, MAC_ARG(mgmt
->sa
));
955 printk(KERN_DEBUG
"%s: too short (%zd) authentication frame "
956 "received from " MAC_FMT
" - ignored\n",
957 dev
->name
, len
, MAC_ARG(mgmt
->sa
));
961 if (sdata
->type
!= IEEE80211_IF_TYPE_IBSS
&&
962 memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0) {
963 printk(KERN_DEBUG
"%s: authentication frame received from "
964 "unknown AP (SA=" MAC_FMT
" BSSID=" MAC_FMT
") - "
965 "ignored\n", dev
->name
, MAC_ARG(mgmt
->sa
),
966 MAC_ARG(mgmt
->bssid
));
970 if (sdata
->type
!= IEEE80211_IF_TYPE_IBSS
&&
971 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0) {
972 printk(KERN_DEBUG
"%s: authentication frame received from "
973 "unknown BSSID (SA=" MAC_FMT
" BSSID=" MAC_FMT
") - "
974 "ignored\n", dev
->name
, MAC_ARG(mgmt
->sa
),
975 MAC_ARG(mgmt
->bssid
));
979 auth_alg
= le16_to_cpu(mgmt
->u
.auth
.auth_alg
);
980 auth_transaction
= le16_to_cpu(mgmt
->u
.auth
.auth_transaction
);
981 status_code
= le16_to_cpu(mgmt
->u
.auth
.status_code
);
983 printk(KERN_DEBUG
"%s: RX authentication from " MAC_FMT
" (alg=%d "
984 "transaction=%d status=%d)\n",
985 dev
->name
, MAC_ARG(mgmt
->sa
), auth_alg
,
986 auth_transaction
, status_code
);
988 if (sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
989 /* IEEE 802.11 standard does not require authentication in IBSS
990 * networks and most implementations do not seem to use it.
991 * However, try to reply to authentication attempts if someone
992 * has actually implemented this.
993 * TODO: Could implement shared key authentication. */
994 if (auth_alg
!= WLAN_AUTH_OPEN
|| auth_transaction
!= 1) {
995 printk(KERN_DEBUG
"%s: unexpected IBSS authentication "
996 "frame (alg=%d transaction=%d)\n",
997 dev
->name
, auth_alg
, auth_transaction
);
1000 ieee80211_send_auth(dev
, ifsta
, 2, NULL
, 0, 0);
1003 if (auth_alg
!= ifsta
->auth_alg
||
1004 auth_transaction
!= ifsta
->auth_transaction
) {
1005 printk(KERN_DEBUG
"%s: unexpected authentication frame "
1006 "(alg=%d transaction=%d)\n",
1007 dev
->name
, auth_alg
, auth_transaction
);
1011 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1012 printk(KERN_DEBUG
"%s: AP denied authentication (auth_alg=%d "
1013 "code=%d)\n", dev
->name
, ifsta
->auth_alg
, status_code
);
1014 if (status_code
== WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG
) {
1016 const int num_algs
= ARRAY_SIZE(algs
);
1018 algs
[0] = algs
[1] = algs
[2] = 0xff;
1019 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
1020 algs
[0] = WLAN_AUTH_OPEN
;
1021 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
1022 algs
[1] = WLAN_AUTH_SHARED_KEY
;
1023 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
1024 algs
[2] = WLAN_AUTH_LEAP
;
1025 if (ifsta
->auth_alg
== WLAN_AUTH_OPEN
)
1027 else if (ifsta
->auth_alg
== WLAN_AUTH_SHARED_KEY
)
1031 for (i
= 0; i
< num_algs
; i
++) {
1033 if (pos
>= num_algs
)
1035 if (algs
[pos
] == ifsta
->auth_alg
||
1038 if (algs
[pos
] == WLAN_AUTH_SHARED_KEY
&&
1039 !ieee80211_sta_wep_configured(dev
))
1041 ifsta
->auth_alg
= algs
[pos
];
1042 printk(KERN_DEBUG
"%s: set auth_alg=%d for "
1044 dev
->name
, ifsta
->auth_alg
);
1051 switch (ifsta
->auth_alg
) {
1052 case WLAN_AUTH_OPEN
:
1053 case WLAN_AUTH_LEAP
:
1054 ieee80211_auth_completed(dev
, ifsta
);
1056 case WLAN_AUTH_SHARED_KEY
:
1057 if (ifsta
->auth_transaction
== 4)
1058 ieee80211_auth_completed(dev
, ifsta
);
1060 ieee80211_auth_challenge(dev
, ifsta
, mgmt
, len
);
1066 static void ieee80211_rx_mgmt_deauth(struct net_device
*dev
,
1067 struct ieee80211_if_sta
*ifsta
,
1068 struct ieee80211_mgmt
*mgmt
,
1074 printk(KERN_DEBUG
"%s: too short (%zd) deauthentication frame "
1075 "received from " MAC_FMT
" - ignored\n",
1076 dev
->name
, len
, MAC_ARG(mgmt
->sa
));
1080 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0) {
1081 printk(KERN_DEBUG
"%s: deauthentication frame received from "
1082 "unknown AP (SA=" MAC_FMT
" BSSID=" MAC_FMT
") - "
1083 "ignored\n", dev
->name
, MAC_ARG(mgmt
->sa
),
1084 MAC_ARG(mgmt
->bssid
));
1088 reason_code
= le16_to_cpu(mgmt
->u
.deauth
.reason_code
);
1090 printk(KERN_DEBUG
"%s: RX deauthentication from " MAC_FMT
1092 dev
->name
, MAC_ARG(mgmt
->sa
), reason_code
);
1094 if (ifsta
->authenticated
) {
1095 printk(KERN_DEBUG
"%s: deauthenticated\n", dev
->name
);
1098 if (ifsta
->state
== IEEE80211_AUTHENTICATE
||
1099 ifsta
->state
== IEEE80211_ASSOCIATE
||
1100 ifsta
->state
== IEEE80211_ASSOCIATED
) {
1101 ifsta
->state
= IEEE80211_AUTHENTICATE
;
1102 mod_timer(&ifsta
->timer
, jiffies
+
1103 IEEE80211_RETRY_AUTH_INTERVAL
);
1106 ieee80211_set_disassoc(dev
, ifsta
, 1);
1107 ifsta
->authenticated
= 0;
1111 static void ieee80211_rx_mgmt_disassoc(struct net_device
*dev
,
1112 struct ieee80211_if_sta
*ifsta
,
1113 struct ieee80211_mgmt
*mgmt
,
1119 printk(KERN_DEBUG
"%s: too short (%zd) disassociation frame "
1120 "received from " MAC_FMT
" - ignored\n",
1121 dev
->name
, len
, MAC_ARG(mgmt
->sa
));
1125 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0) {
1126 printk(KERN_DEBUG
"%s: disassociation frame received from "
1127 "unknown AP (SA=" MAC_FMT
" BSSID=" MAC_FMT
") - "
1128 "ignored\n", dev
->name
, MAC_ARG(mgmt
->sa
),
1129 MAC_ARG(mgmt
->bssid
));
1133 reason_code
= le16_to_cpu(mgmt
->u
.disassoc
.reason_code
);
1135 printk(KERN_DEBUG
"%s: RX disassociation from " MAC_FMT
1137 dev
->name
, MAC_ARG(mgmt
->sa
), reason_code
);
1139 if (ifsta
->associated
)
1140 printk(KERN_DEBUG
"%s: disassociated\n", dev
->name
);
1142 if (ifsta
->state
== IEEE80211_ASSOCIATED
) {
1143 ifsta
->state
= IEEE80211_ASSOCIATE
;
1144 mod_timer(&ifsta
->timer
, jiffies
+
1145 IEEE80211_RETRY_AUTH_INTERVAL
);
1148 ieee80211_set_disassoc(dev
, ifsta
, 0);
1152 static void ieee80211_rx_mgmt_assoc_resp(struct net_device
*dev
,
1153 struct ieee80211_if_sta
*ifsta
,
1154 struct ieee80211_mgmt
*mgmt
,
1158 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1159 struct ieee80211_hw_mode
*mode
;
1160 struct sta_info
*sta
;
1162 u16 capab_info
, status_code
, aid
;
1163 struct ieee802_11_elems elems
;
1167 /* AssocResp and ReassocResp have identical structure, so process both
1168 * of them in this function. */
1170 if (ifsta
->state
!= IEEE80211_ASSOCIATE
) {
1171 printk(KERN_DEBUG
"%s: association frame received from "
1172 MAC_FMT
", but not in associate state - ignored\n",
1173 dev
->name
, MAC_ARG(mgmt
->sa
));
1178 printk(KERN_DEBUG
"%s: too short (%zd) association frame "
1179 "received from " MAC_FMT
" - ignored\n",
1180 dev
->name
, len
, MAC_ARG(mgmt
->sa
));
1184 if (memcmp(ifsta
->bssid
, mgmt
->sa
, ETH_ALEN
) != 0) {
1185 printk(KERN_DEBUG
"%s: association frame received from "
1186 "unknown AP (SA=" MAC_FMT
" BSSID=" MAC_FMT
") - "
1187 "ignored\n", dev
->name
, MAC_ARG(mgmt
->sa
),
1188 MAC_ARG(mgmt
->bssid
));
1192 capab_info
= le16_to_cpu(mgmt
->u
.assoc_resp
.capab_info
);
1193 status_code
= le16_to_cpu(mgmt
->u
.assoc_resp
.status_code
);
1194 aid
= le16_to_cpu(mgmt
->u
.assoc_resp
.aid
);
1195 if ((aid
& (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1196 printk(KERN_DEBUG
"%s: invalid aid value %d; bits 15:14 not "
1197 "set\n", dev
->name
, aid
);
1198 aid
&= ~(BIT(15) | BIT(14));
1200 printk(KERN_DEBUG
"%s: RX %sssocResp from " MAC_FMT
" (capab=0x%x "
1201 "status=%d aid=%d)\n",
1202 dev
->name
, reassoc
? "Rea" : "A", MAC_ARG(mgmt
->sa
),
1203 capab_info
, status_code
, aid
);
1205 if (status_code
!= WLAN_STATUS_SUCCESS
) {
1206 printk(KERN_DEBUG
"%s: AP denied association (code=%d)\n",
1207 dev
->name
, status_code
);
1208 /* if this was a reassociation, ensure we try a "full"
1209 * association next time. This works around some broken APs
1210 * which do not correctly reject reassociation requests. */
1211 ifsta
->prev_bssid_set
= 0;
1215 pos
= mgmt
->u
.assoc_resp
.variable
;
1216 if (ieee802_11_parse_elems(pos
, len
- (pos
- (u8
*) mgmt
), &elems
)
1218 printk(KERN_DEBUG
"%s: failed to parse AssocResp\n",
1223 if (!elems
.supp_rates
) {
1224 printk(KERN_DEBUG
"%s: no SuppRates element in AssocResp\n",
1229 /* it probably doesn't, but if the frame includes an ERP value then
1230 * update our stored copy */
1231 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1232 struct ieee80211_sta_bss
*bss
1233 = ieee80211_rx_bss_get(dev
, ifsta
->bssid
);
1235 bss
->erp_value
= elems
.erp_info
[0];
1236 bss
->has_erp_value
= 1;
1237 ieee80211_rx_bss_put(dev
, bss
);
1241 printk(KERN_DEBUG
"%s: associated\n", dev
->name
);
1243 ifsta
->ap_capab
= capab_info
;
1245 kfree(ifsta
->assocresp_ies
);
1246 ifsta
->assocresp_ies_len
= len
- (pos
- (u8
*) mgmt
);
1247 ifsta
->assocresp_ies
= kmalloc(ifsta
->assocresp_ies_len
, GFP_KERNEL
);
1248 if (ifsta
->assocresp_ies
)
1249 memcpy(ifsta
->assocresp_ies
, pos
, ifsta
->assocresp_ies_len
);
1251 ieee80211_set_associated(dev
, ifsta
, 1);
1253 /* Add STA entry for the AP */
1254 sta
= sta_info_get(local
, ifsta
->bssid
);
1256 struct ieee80211_sta_bss
*bss
;
1257 sta
= sta_info_add(local
, dev
, ifsta
->bssid
, GFP_KERNEL
);
1259 printk(KERN_DEBUG
"%s: failed to add STA entry for the"
1260 " AP\n", dev
->name
);
1263 bss
= ieee80211_rx_bss_get(dev
, ifsta
->bssid
);
1265 sta
->last_rssi
= bss
->rssi
;
1266 sta
->last_signal
= bss
->signal
;
1267 sta
->last_noise
= bss
->noise
;
1268 ieee80211_rx_bss_put(dev
, bss
);
1273 sta
->flags
|= WLAN_STA_AUTH
| WLAN_STA_ASSOC
;
1277 mode
= local
->oper_hw_mode
;
1278 for (i
= 0; i
< elems
.supp_rates_len
; i
++) {
1279 int rate
= (elems
.supp_rates
[i
] & 0x7f) * 5;
1280 if (mode
->mode
== MODE_ATHEROS_TURBO
)
1282 for (j
= 0; j
< mode
->num_rates
; j
++)
1283 if (mode
->rates
[j
].rate
== rate
)
1286 for (i
= 0; i
< elems
.ext_supp_rates_len
; i
++) {
1287 int rate
= (elems
.ext_supp_rates
[i
] & 0x7f) * 5;
1288 if (mode
->mode
== MODE_ATHEROS_TURBO
)
1290 for (j
= 0; j
< mode
->num_rates
; j
++)
1291 if (mode
->rates
[j
].rate
== rate
)
1294 sta
->supp_rates
= rates
;
1296 rate_control_rate_init(sta
, local
);
1298 if (elems
.wmm_param
&& ifsta
->wmm_enabled
) {
1299 sta
->flags
|= WLAN_STA_WME
;
1300 ieee80211_sta_wmm_params(dev
, ifsta
, elems
.wmm_param
,
1301 elems
.wmm_param_len
);
1307 ieee80211_associated(dev
, ifsta
);
1311 /* Caller must hold local->sta_bss_lock */
1312 static void __ieee80211_rx_bss_hash_add(struct net_device
*dev
,
1313 struct ieee80211_sta_bss
*bss
)
1315 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1316 bss
->hnext
= local
->sta_bss_hash
[STA_HASH(bss
->bssid
)];
1317 local
->sta_bss_hash
[STA_HASH(bss
->bssid
)] = bss
;
1321 /* Caller must hold local->sta_bss_lock */
1322 static void __ieee80211_rx_bss_hash_del(struct net_device
*dev
,
1323 struct ieee80211_sta_bss
*bss
)
1325 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1326 struct ieee80211_sta_bss
*b
, *prev
= NULL
;
1327 b
= local
->sta_bss_hash
[STA_HASH(bss
->bssid
)];
1331 local
->sta_bss_hash
[STA_HASH(bss
->bssid
)] =
1334 prev
->hnext
= bss
->hnext
;
1343 static struct ieee80211_sta_bss
*
1344 ieee80211_rx_bss_add(struct net_device
*dev
, u8
*bssid
)
1346 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1347 struct ieee80211_sta_bss
*bss
;
1349 bss
= kzalloc(sizeof(*bss
), GFP_ATOMIC
);
1352 atomic_inc(&bss
->users
);
1353 atomic_inc(&bss
->users
);
1354 memcpy(bss
->bssid
, bssid
, ETH_ALEN
);
1356 spin_lock_bh(&local
->sta_bss_lock
);
1357 /* TODO: order by RSSI? */
1358 list_add_tail(&bss
->list
, &local
->sta_bss_list
);
1359 __ieee80211_rx_bss_hash_add(dev
, bss
);
1360 spin_unlock_bh(&local
->sta_bss_lock
);
1365 static struct ieee80211_sta_bss
*
1366 ieee80211_rx_bss_get(struct net_device
*dev
, u8
*bssid
)
1368 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1369 struct ieee80211_sta_bss
*bss
;
1371 spin_lock_bh(&local
->sta_bss_lock
);
1372 bss
= local
->sta_bss_hash
[STA_HASH(bssid
)];
1374 if (memcmp(bss
->bssid
, bssid
, ETH_ALEN
) == 0) {
1375 atomic_inc(&bss
->users
);
1380 spin_unlock_bh(&local
->sta_bss_lock
);
1385 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss
*bss
)
1394 static void ieee80211_rx_bss_put(struct net_device
*dev
,
1395 struct ieee80211_sta_bss
*bss
)
1397 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1398 if (!atomic_dec_and_test(&bss
->users
))
1401 spin_lock_bh(&local
->sta_bss_lock
);
1402 __ieee80211_rx_bss_hash_del(dev
, bss
);
1403 list_del(&bss
->list
);
1404 spin_unlock_bh(&local
->sta_bss_lock
);
1405 ieee80211_rx_bss_free(bss
);
1409 void ieee80211_rx_bss_list_init(struct net_device
*dev
)
1411 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1412 spin_lock_init(&local
->sta_bss_lock
);
1413 INIT_LIST_HEAD(&local
->sta_bss_list
);
1417 void ieee80211_rx_bss_list_deinit(struct net_device
*dev
)
1419 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1420 struct ieee80211_sta_bss
*bss
, *tmp
;
1422 list_for_each_entry_safe(bss
, tmp
, &local
->sta_bss_list
, list
)
1423 ieee80211_rx_bss_put(dev
, bss
);
1427 static void ieee80211_rx_bss_info(struct net_device
*dev
,
1428 struct ieee80211_mgmt
*mgmt
,
1430 struct ieee80211_rx_status
*rx_status
,
1433 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1434 struct ieee802_11_elems elems
;
1436 int channel
, invalid
= 0, clen
;
1437 struct ieee80211_sta_bss
*bss
;
1438 struct sta_info
*sta
;
1439 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1442 if (!beacon
&& memcmp(mgmt
->da
, dev
->dev_addr
, ETH_ALEN
))
1443 return; /* ignore ProbeResp to foreign address */
1446 printk(KERN_DEBUG
"%s: RX %s from " MAC_FMT
" to " MAC_FMT
"\n",
1447 dev
->name
, beacon
? "Beacon" : "Probe Response",
1448 MAC_ARG(mgmt
->sa
), MAC_ARG(mgmt
->da
));
1451 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1455 timestamp
= le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
1457 if (sdata
->type
== IEEE80211_IF_TYPE_IBSS
&& beacon
&&
1458 memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0) {
1459 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1460 static unsigned long last_tsf_debug
= 0;
1462 if (local
->ops
->get_tsf
)
1463 tsf
= local
->ops
->get_tsf(local_to_hw(local
));
1466 if (time_after(jiffies
, last_tsf_debug
+ 5 * HZ
)) {
1467 printk(KERN_DEBUG
"RX beacon SA=" MAC_FMT
" BSSID="
1468 MAC_FMT
" TSF=0x%llx BCN=0x%llx diff=%lld "
1470 MAC_ARG(mgmt
->sa
), MAC_ARG(mgmt
->bssid
),
1471 (unsigned long long)tsf
,
1472 (unsigned long long)timestamp
,
1473 (unsigned long long)(tsf
- timestamp
),
1475 last_tsf_debug
= jiffies
;
1477 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1480 if (ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
,
1481 &elems
) == ParseFailed
)
1484 if (sdata
->type
== IEEE80211_IF_TYPE_IBSS
&& elems
.supp_rates
&&
1485 memcmp(mgmt
->bssid
, sdata
->u
.sta
.bssid
, ETH_ALEN
) == 0 &&
1486 (sta
= sta_info_get(local
, mgmt
->sa
))) {
1487 struct ieee80211_hw_mode
*mode
;
1488 struct ieee80211_rate
*rates
;
1490 u32 supp_rates
, prev_rates
;
1493 mode
= local
->sta_scanning
?
1494 local
->scan_hw_mode
: local
->oper_hw_mode
;
1495 rates
= mode
->rates
;
1496 num_rates
= mode
->num_rates
;
1499 for (i
= 0; i
< elems
.supp_rates_len
+
1500 elems
.ext_supp_rates_len
; i
++) {
1503 if (i
< elems
.supp_rates_len
)
1504 rate
= elems
.supp_rates
[i
];
1505 else if (elems
.ext_supp_rates
)
1506 rate
= elems
.ext_supp_rates
1507 [i
- elems
.supp_rates_len
];
1508 own_rate
= 5 * (rate
& 0x7f);
1509 if (mode
->mode
== MODE_ATHEROS_TURBO
)
1511 for (j
= 0; j
< num_rates
; j
++)
1512 if (rates
[j
].rate
== own_rate
)
1513 supp_rates
|= BIT(j
);
1516 prev_rates
= sta
->supp_rates
;
1517 sta
->supp_rates
&= supp_rates
;
1518 if (sta
->supp_rates
== 0) {
1519 /* No matching rates - this should not really happen.
1520 * Make sure that at least one rate is marked
1521 * supported to avoid issues with TX rate ctrl. */
1522 sta
->supp_rates
= sdata
->u
.sta
.supp_rates_bits
;
1524 if (sta
->supp_rates
!= prev_rates
) {
1525 printk(KERN_DEBUG
"%s: updated supp_rates set for "
1526 MAC_FMT
" based on beacon info (0x%x & 0x%x -> "
1528 dev
->name
, MAC_ARG(sta
->addr
), prev_rates
,
1529 supp_rates
, sta
->supp_rates
);
1537 if (elems
.ds_params
&& elems
.ds_params_len
== 1)
1538 channel
= elems
.ds_params
[0];
1540 channel
= rx_status
->channel
;
1542 bss
= ieee80211_rx_bss_get(dev
, mgmt
->bssid
);
1544 bss
= ieee80211_rx_bss_add(dev
, mgmt
->bssid
);
1549 /* TODO: order by RSSI? */
1550 spin_lock_bh(&local
->sta_bss_lock
);
1551 list_move_tail(&bss
->list
, &local
->sta_bss_list
);
1552 spin_unlock_bh(&local
->sta_bss_lock
);
1556 if (bss
->probe_resp
&& beacon
) {
1557 /* Do not allow beacon to override data from Probe Response. */
1558 ieee80211_rx_bss_put(dev
, bss
);
1562 /* save the ERP value so that it is available at association time */
1563 if (elems
.erp_info
&& elems
.erp_info_len
>= 1) {
1564 bss
->erp_value
= elems
.erp_info
[0];
1565 bss
->has_erp_value
= 1;
1568 bss
->beacon_int
= le16_to_cpu(mgmt
->u
.beacon
.beacon_int
);
1569 bss
->capability
= le16_to_cpu(mgmt
->u
.beacon
.capab_info
);
1570 if (elems
.ssid
&& elems
.ssid_len
<= IEEE80211_MAX_SSID_LEN
) {
1571 memcpy(bss
->ssid
, elems
.ssid
, elems
.ssid_len
);
1572 bss
->ssid_len
= elems
.ssid_len
;
1575 bss
->supp_rates_len
= 0;
1576 if (elems
.supp_rates
) {
1577 clen
= IEEE80211_MAX_SUPP_RATES
- bss
->supp_rates_len
;
1578 if (clen
> elems
.supp_rates_len
)
1579 clen
= elems
.supp_rates_len
;
1580 memcpy(&bss
->supp_rates
[bss
->supp_rates_len
], elems
.supp_rates
,
1582 bss
->supp_rates_len
+= clen
;
1584 if (elems
.ext_supp_rates
) {
1585 clen
= IEEE80211_MAX_SUPP_RATES
- bss
->supp_rates_len
;
1586 if (clen
> elems
.ext_supp_rates_len
)
1587 clen
= elems
.ext_supp_rates_len
;
1588 memcpy(&bss
->supp_rates
[bss
->supp_rates_len
],
1589 elems
.ext_supp_rates
, clen
);
1590 bss
->supp_rates_len
+= clen
;
1594 (!bss
->wpa_ie
|| bss
->wpa_ie_len
!= elems
.wpa_len
||
1595 memcmp(bss
->wpa_ie
, elems
.wpa
, elems
.wpa_len
))) {
1597 bss
->wpa_ie
= kmalloc(elems
.wpa_len
+ 2, GFP_ATOMIC
);
1599 memcpy(bss
->wpa_ie
, elems
.wpa
- 2, elems
.wpa_len
+ 2);
1600 bss
->wpa_ie_len
= elems
.wpa_len
+ 2;
1602 bss
->wpa_ie_len
= 0;
1603 } else if (!elems
.wpa
&& bss
->wpa_ie
) {
1606 bss
->wpa_ie_len
= 0;
1610 (!bss
->rsn_ie
|| bss
->rsn_ie_len
!= elems
.rsn_len
||
1611 memcmp(bss
->rsn_ie
, elems
.rsn
, elems
.rsn_len
))) {
1613 bss
->rsn_ie
= kmalloc(elems
.rsn_len
+ 2, GFP_ATOMIC
);
1615 memcpy(bss
->rsn_ie
, elems
.rsn
- 2, elems
.rsn_len
+ 2);
1616 bss
->rsn_ie_len
= elems
.rsn_len
+ 2;
1618 bss
->rsn_ie_len
= 0;
1619 } else if (!elems
.rsn
&& bss
->rsn_ie
) {
1622 bss
->rsn_ie_len
= 0;
1625 if (elems
.wmm_param
&&
1626 (!bss
->wmm_ie
|| bss
->wmm_ie_len
!= elems
.wmm_param_len
||
1627 memcmp(bss
->wmm_ie
, elems
.wmm_param
, elems
.wmm_param_len
))) {
1629 bss
->wmm_ie
= kmalloc(elems
.wmm_param_len
+ 2, GFP_ATOMIC
);
1631 memcpy(bss
->wmm_ie
, elems
.wmm_param
- 2,
1632 elems
.wmm_param_len
+ 2);
1633 bss
->wmm_ie_len
= elems
.wmm_param_len
+ 2;
1635 bss
->wmm_ie_len
= 0;
1636 } else if (!elems
.wmm_param
&& bss
->wmm_ie
) {
1639 bss
->wmm_ie_len
= 0;
1643 bss
->hw_mode
= rx_status
->phymode
;
1644 bss
->channel
= channel
;
1645 bss
->freq
= rx_status
->freq
;
1646 if (channel
!= rx_status
->channel
&&
1647 (bss
->hw_mode
== MODE_IEEE80211G
||
1648 bss
->hw_mode
== MODE_IEEE80211B
) &&
1649 channel
>= 1 && channel
<= 14) {
1650 static const int freq_list
[] = {
1651 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1652 2447, 2452, 2457, 2462, 2467, 2472, 2484
1654 /* IEEE 802.11g/b mode can receive packets from neighboring
1655 * channels, so map the channel into frequency. */
1656 bss
->freq
= freq_list
[channel
- 1];
1658 bss
->timestamp
= timestamp
;
1659 bss
->last_update
= jiffies
;
1660 bss
->rssi
= rx_status
->ssi
;
1661 bss
->signal
= rx_status
->signal
;
1662 bss
->noise
= rx_status
->noise
;
1665 ieee80211_rx_bss_put(dev
, bss
);
1669 static void ieee80211_rx_mgmt_probe_resp(struct net_device
*dev
,
1670 struct ieee80211_mgmt
*mgmt
,
1672 struct ieee80211_rx_status
*rx_status
)
1674 ieee80211_rx_bss_info(dev
, mgmt
, len
, rx_status
, 0);
1678 static void ieee80211_rx_mgmt_beacon(struct net_device
*dev
,
1679 struct ieee80211_mgmt
*mgmt
,
1681 struct ieee80211_rx_status
*rx_status
)
1683 struct ieee80211_sub_if_data
*sdata
;
1684 struct ieee80211_if_sta
*ifsta
;
1686 struct ieee802_11_elems elems
;
1688 ieee80211_rx_bss_info(dev
, mgmt
, len
, rx_status
, 1);
1690 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1691 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
)
1693 ifsta
= &sdata
->u
.sta
;
1695 if (!ifsta
->associated
||
1696 memcmp(ifsta
->bssid
, mgmt
->bssid
, ETH_ALEN
) != 0)
1699 /* Process beacon from the current BSS */
1700 baselen
= (u8
*) mgmt
->u
.beacon
.variable
- (u8
*) mgmt
;
1704 if (ieee802_11_parse_elems(mgmt
->u
.beacon
.variable
, len
- baselen
,
1705 &elems
) == ParseFailed
)
1708 if (elems
.erp_info
&& elems
.erp_info_len
>= 1)
1709 ieee80211_handle_erp_ie(dev
, elems
.erp_info
[0]);
1711 if (elems
.wmm_param
&& ifsta
->wmm_enabled
) {
1712 ieee80211_sta_wmm_params(dev
, ifsta
, elems
.wmm_param
,
1713 elems
.wmm_param_len
);
1718 static void ieee80211_rx_mgmt_probe_req(struct net_device
*dev
,
1719 struct ieee80211_if_sta
*ifsta
,
1720 struct ieee80211_mgmt
*mgmt
,
1722 struct ieee80211_rx_status
*rx_status
)
1724 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1725 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1727 struct sk_buff
*skb
;
1728 struct ieee80211_mgmt
*resp
;
1731 if (sdata
->type
!= IEEE80211_IF_TYPE_IBSS
||
1732 ifsta
->state
!= IEEE80211_IBSS_JOINED
||
1733 len
< 24 + 2 || !ifsta
->probe_resp
)
1736 if (local
->ops
->tx_last_beacon
)
1737 tx_last_beacon
= local
->ops
->tx_last_beacon(local_to_hw(local
));
1741 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1742 printk(KERN_DEBUG
"%s: RX ProbeReq SA=" MAC_FMT
" DA=" MAC_FMT
" BSSID="
1743 MAC_FMT
" (tx_last_beacon=%d)\n",
1744 dev
->name
, MAC_ARG(mgmt
->sa
), MAC_ARG(mgmt
->da
),
1745 MAC_ARG(mgmt
->bssid
), tx_last_beacon
);
1746 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1748 if (!tx_last_beacon
)
1751 if (memcmp(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
) != 0 &&
1752 memcmp(mgmt
->bssid
, "\xff\xff\xff\xff\xff\xff", ETH_ALEN
) != 0)
1755 end
= ((u8
*) mgmt
) + len
;
1756 pos
= mgmt
->u
.probe_req
.variable
;
1757 if (pos
[0] != WLAN_EID_SSID
||
1758 pos
+ 2 + pos
[1] > end
) {
1759 if (net_ratelimit()) {
1760 printk(KERN_DEBUG
"%s: Invalid SSID IE in ProbeReq "
1761 "from " MAC_FMT
"\n",
1762 dev
->name
, MAC_ARG(mgmt
->sa
));
1767 (pos
[1] != ifsta
->ssid_len
||
1768 memcmp(pos
+ 2, ifsta
->ssid
, ifsta
->ssid_len
) != 0)) {
1769 /* Ignore ProbeReq for foreign SSID */
1773 /* Reply with ProbeResp */
1774 skb
= skb_copy(ifsta
->probe_resp
, GFP_KERNEL
);
1778 resp
= (struct ieee80211_mgmt
*) skb
->data
;
1779 memcpy(resp
->da
, mgmt
->sa
, ETH_ALEN
);
1780 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1781 printk(KERN_DEBUG
"%s: Sending ProbeResp to " MAC_FMT
"\n",
1782 dev
->name
, MAC_ARG(resp
->da
));
1783 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1784 ieee80211_sta_tx(dev
, skb
, 0);
1788 void ieee80211_sta_rx_mgmt(struct net_device
*dev
, struct sk_buff
*skb
,
1789 struct ieee80211_rx_status
*rx_status
)
1791 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1792 struct ieee80211_sub_if_data
*sdata
;
1793 struct ieee80211_if_sta
*ifsta
;
1794 struct ieee80211_mgmt
*mgmt
;
1800 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1801 ifsta
= &sdata
->u
.sta
;
1803 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1804 fc
= le16_to_cpu(mgmt
->frame_control
);
1806 switch (fc
& IEEE80211_FCTL_STYPE
) {
1807 case IEEE80211_STYPE_PROBE_REQ
:
1808 case IEEE80211_STYPE_PROBE_RESP
:
1809 case IEEE80211_STYPE_BEACON
:
1810 memcpy(skb
->cb
, rx_status
, sizeof(*rx_status
));
1811 case IEEE80211_STYPE_AUTH
:
1812 case IEEE80211_STYPE_ASSOC_RESP
:
1813 case IEEE80211_STYPE_REASSOC_RESP
:
1814 case IEEE80211_STYPE_DEAUTH
:
1815 case IEEE80211_STYPE_DISASSOC
:
1816 skb_queue_tail(&ifsta
->skb_queue
, skb
);
1817 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
1820 printk(KERN_DEBUG
"%s: received unknown management frame - "
1821 "stype=%d\n", dev
->name
,
1822 (fc
& IEEE80211_FCTL_STYPE
) >> 4);
1831 static void ieee80211_sta_rx_queued_mgmt(struct net_device
*dev
,
1832 struct sk_buff
*skb
)
1834 struct ieee80211_rx_status
*rx_status
;
1835 struct ieee80211_sub_if_data
*sdata
;
1836 struct ieee80211_if_sta
*ifsta
;
1837 struct ieee80211_mgmt
*mgmt
;
1840 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1841 ifsta
= &sdata
->u
.sta
;
1843 rx_status
= (struct ieee80211_rx_status
*) skb
->cb
;
1844 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1845 fc
= le16_to_cpu(mgmt
->frame_control
);
1847 switch (fc
& IEEE80211_FCTL_STYPE
) {
1848 case IEEE80211_STYPE_PROBE_REQ
:
1849 ieee80211_rx_mgmt_probe_req(dev
, ifsta
, mgmt
, skb
->len
,
1852 case IEEE80211_STYPE_PROBE_RESP
:
1853 ieee80211_rx_mgmt_probe_resp(dev
, mgmt
, skb
->len
, rx_status
);
1855 case IEEE80211_STYPE_BEACON
:
1856 ieee80211_rx_mgmt_beacon(dev
, mgmt
, skb
->len
, rx_status
);
1858 case IEEE80211_STYPE_AUTH
:
1859 ieee80211_rx_mgmt_auth(dev
, ifsta
, mgmt
, skb
->len
);
1861 case IEEE80211_STYPE_ASSOC_RESP
:
1862 ieee80211_rx_mgmt_assoc_resp(dev
, ifsta
, mgmt
, skb
->len
, 0);
1864 case IEEE80211_STYPE_REASSOC_RESP
:
1865 ieee80211_rx_mgmt_assoc_resp(dev
, ifsta
, mgmt
, skb
->len
, 1);
1867 case IEEE80211_STYPE_DEAUTH
:
1868 ieee80211_rx_mgmt_deauth(dev
, ifsta
, mgmt
, skb
->len
);
1870 case IEEE80211_STYPE_DISASSOC
:
1871 ieee80211_rx_mgmt_disassoc(dev
, ifsta
, mgmt
, skb
->len
);
1879 void ieee80211_sta_rx_scan(struct net_device
*dev
, struct sk_buff
*skb
,
1880 struct ieee80211_rx_status
*rx_status
)
1882 struct ieee80211_mgmt
*mgmt
;
1885 if (skb
->len
< 24) {
1890 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1891 fc
= le16_to_cpu(mgmt
->frame_control
);
1893 if ((fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_MGMT
) {
1894 if ((fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_PROBE_RESP
) {
1895 ieee80211_rx_mgmt_probe_resp(dev
, mgmt
,
1896 skb
->len
, rx_status
);
1897 } else if ((fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_BEACON
) {
1898 ieee80211_rx_mgmt_beacon(dev
, mgmt
, skb
->len
,
1907 static int ieee80211_sta_active_ibss(struct net_device
*dev
)
1909 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1911 struct sta_info
*sta
;
1913 read_lock_bh(&local
->sta_lock
);
1914 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1915 if (sta
->dev
== dev
&&
1916 time_after(sta
->last_rx
+ IEEE80211_IBSS_MERGE_INTERVAL
,
1922 read_unlock_bh(&local
->sta_lock
);
1928 static void ieee80211_sta_expire(struct net_device
*dev
)
1930 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1931 struct sta_info
*sta
, *tmp
;
1932 LIST_HEAD(tmp_list
);
1934 write_lock_bh(&local
->sta_lock
);
1935 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
)
1936 if (time_after(jiffies
, sta
->last_rx
+
1937 IEEE80211_IBSS_INACTIVITY_LIMIT
)) {
1938 printk(KERN_DEBUG
"%s: expiring inactive STA " MAC_FMT
1939 "\n", dev
->name
, MAC_ARG(sta
->addr
));
1940 __sta_info_get(sta
);
1941 sta_info_remove(sta
);
1942 list_add(&sta
->list
, &tmp_list
);
1944 write_unlock_bh(&local
->sta_lock
);
1946 list_for_each_entry_safe(sta
, tmp
, &tmp_list
, list
) {
1953 static void ieee80211_sta_merge_ibss(struct net_device
*dev
,
1954 struct ieee80211_if_sta
*ifsta
)
1956 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
1958 ieee80211_sta_expire(dev
);
1959 if (ieee80211_sta_active_ibss(dev
))
1962 printk(KERN_DEBUG
"%s: No active IBSS STAs - trying to scan for other "
1963 "IBSS networks with same SSID (merge)\n", dev
->name
);
1964 ieee80211_sta_req_scan(dev
, ifsta
->ssid
, ifsta
->ssid_len
);
1968 void ieee80211_sta_timer(unsigned long data
)
1970 struct ieee80211_sub_if_data
*sdata
=
1971 (struct ieee80211_sub_if_data
*) data
;
1972 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
1973 struct ieee80211_local
*local
= wdev_priv(&sdata
->wdev
);
1975 set_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
1976 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
1980 void ieee80211_sta_work(struct work_struct
*work
)
1982 struct ieee80211_sub_if_data
*sdata
=
1983 container_of(work
, struct ieee80211_sub_if_data
, u
.sta
.work
);
1984 struct net_device
*dev
= sdata
->dev
;
1985 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1986 struct ieee80211_if_sta
*ifsta
;
1987 struct sk_buff
*skb
;
1989 if (!netif_running(dev
))
1992 if (local
->sta_scanning
)
1995 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
&&
1996 sdata
->type
!= IEEE80211_IF_TYPE_IBSS
) {
1997 printk(KERN_DEBUG
"%s: ieee80211_sta_work: non-STA interface "
1998 "(type=%d)\n", dev
->name
, sdata
->type
);
2001 ifsta
= &sdata
->u
.sta
;
2003 while ((skb
= skb_dequeue(&ifsta
->skb_queue
)))
2004 ieee80211_sta_rx_queued_mgmt(dev
, skb
);
2006 if (ifsta
->state
!= IEEE80211_AUTHENTICATE
&&
2007 ifsta
->state
!= IEEE80211_ASSOCIATE
&&
2008 test_and_clear_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
)) {
2009 ieee80211_sta_start_scan(dev
, NULL
, 0);
2013 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
)) {
2014 if (ieee80211_sta_config_auth(dev
, ifsta
))
2016 clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
);
2017 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN
, &ifsta
->request
))
2020 switch (ifsta
->state
) {
2021 case IEEE80211_DISABLED
:
2023 case IEEE80211_AUTHENTICATE
:
2024 ieee80211_authenticate(dev
, ifsta
);
2026 case IEEE80211_ASSOCIATE
:
2027 ieee80211_associate(dev
, ifsta
);
2029 case IEEE80211_ASSOCIATED
:
2030 ieee80211_associated(dev
, ifsta
);
2032 case IEEE80211_IBSS_SEARCH
:
2033 ieee80211_sta_find_ibss(dev
, ifsta
);
2035 case IEEE80211_IBSS_JOINED
:
2036 ieee80211_sta_merge_ibss(dev
, ifsta
);
2039 printk(KERN_DEBUG
"ieee80211_sta_work: Unknown state %d\n",
2044 if (ieee80211_privacy_mismatch(dev
, ifsta
)) {
2045 printk(KERN_DEBUG
"%s: privacy configuration mismatch and "
2046 "mixed-cell disabled - disassociate\n", dev
->name
);
2048 ieee80211_send_disassoc(dev
, ifsta
, WLAN_REASON_UNSPECIFIED
);
2049 ieee80211_set_disassoc(dev
, ifsta
, 0);
2054 static void ieee80211_sta_reset_auth(struct net_device
*dev
,
2055 struct ieee80211_if_sta
*ifsta
)
2057 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2059 if (local
->ops
->reset_tsf
) {
2060 /* Reset own TSF to allow time synchronization work. */
2061 local
->ops
->reset_tsf(local_to_hw(local
));
2064 ifsta
->wmm_last_param_set
= -1; /* allow any WMM update */
2067 if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_OPEN
)
2068 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
2069 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_SHARED_KEY
)
2070 ifsta
->auth_alg
= WLAN_AUTH_SHARED_KEY
;
2071 else if (ifsta
->auth_algs
& IEEE80211_AUTH_ALG_LEAP
)
2072 ifsta
->auth_alg
= WLAN_AUTH_LEAP
;
2074 ifsta
->auth_alg
= WLAN_AUTH_OPEN
;
2075 printk(KERN_DEBUG
"%s: Initial auth_alg=%d\n", dev
->name
,
2077 ifsta
->auth_transaction
= -1;
2078 ifsta
->associated
= ifsta
->auth_tries
= ifsta
->assoc_tries
= 0;
2079 netif_carrier_off(dev
);
2083 void ieee80211_sta_req_auth(struct net_device
*dev
,
2084 struct ieee80211_if_sta
*ifsta
)
2086 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2087 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2089 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
)
2092 if ((ifsta
->bssid_set
|| ifsta
->auto_bssid_sel
) &&
2093 (ifsta
->ssid_set
|| ifsta
->auto_ssid_sel
)) {
2094 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2095 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2099 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta
*ifsta
,
2100 const char *ssid
, int ssid_len
)
2102 int tmp
, hidden_ssid
;
2104 if (!memcmp(ifsta
->ssid
, ssid
, ssid_len
))
2107 if (ifsta
->auto_bssid_sel
)
2113 if (ssid
[tmp
] != '\0') {
2119 if (hidden_ssid
&& ifsta
->ssid_len
== ssid_len
)
2122 if (ssid_len
== 1 && ssid
[0] == ' ')
2128 static int ieee80211_sta_config_auth(struct net_device
*dev
,
2129 struct ieee80211_if_sta
*ifsta
)
2131 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2132 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2133 struct ieee80211_sta_bss
*bss
, *selected
= NULL
;
2134 int top_rssi
= 0, freq
;
2136 if (!ifsta
->auto_channel_sel
&& !ifsta
->auto_bssid_sel
&&
2137 !ifsta
->auto_ssid_sel
) {
2138 ifsta
->state
= IEEE80211_AUTHENTICATE
;
2139 ieee80211_sta_reset_auth(dev
, ifsta
);
2143 spin_lock_bh(&local
->sta_bss_lock
);
2144 freq
= local
->oper_channel
->freq
;
2145 list_for_each_entry(bss
, &local
->sta_bss_list
, list
) {
2146 if (!(bss
->capability
& WLAN_CAPABILITY_ESS
))
2149 if (!!(bss
->capability
& WLAN_CAPABILITY_PRIVACY
) ^
2150 !!sdata
->default_key
)
2153 if (!ifsta
->auto_channel_sel
&& bss
->freq
!= freq
)
2156 if (!ifsta
->auto_bssid_sel
&&
2157 memcmp(bss
->bssid
, ifsta
->bssid
, ETH_ALEN
))
2160 if (!ifsta
->auto_ssid_sel
&&
2161 !ieee80211_sta_match_ssid(ifsta
, bss
->ssid
, bss
->ssid_len
))
2164 if (!selected
|| top_rssi
< bss
->rssi
) {
2166 top_rssi
= bss
->rssi
;
2170 atomic_inc(&selected
->users
);
2171 spin_unlock_bh(&local
->sta_bss_lock
);
2174 ieee80211_set_channel(local
, -1, selected
->freq
);
2175 if (!ifsta
->ssid_set
)
2176 ieee80211_sta_set_ssid(dev
, selected
->ssid
,
2177 selected
->ssid_len
);
2178 ieee80211_sta_set_bssid(dev
, selected
->bssid
);
2179 ieee80211_rx_bss_put(dev
, selected
);
2180 ifsta
->state
= IEEE80211_AUTHENTICATE
;
2181 ieee80211_sta_reset_auth(dev
, ifsta
);
2184 if (ifsta
->state
!= IEEE80211_AUTHENTICATE
) {
2185 if (ifsta
->auto_ssid_sel
)
2186 ieee80211_sta_start_scan(dev
, NULL
, 0);
2188 ieee80211_sta_start_scan(dev
, ifsta
->ssid
,
2190 ifsta
->state
= IEEE80211_AUTHENTICATE
;
2191 set_bit(IEEE80211_STA_REQ_AUTH
, &ifsta
->request
);
2193 ifsta
->state
= IEEE80211_DISABLED
;
2198 static int ieee80211_sta_join_ibss(struct net_device
*dev
,
2199 struct ieee80211_if_sta
*ifsta
,
2200 struct ieee80211_sta_bss
*bss
)
2202 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2203 int res
, rates
, i
, j
;
2204 struct sk_buff
*skb
;
2205 struct ieee80211_mgmt
*mgmt
;
2206 struct ieee80211_tx_control control
;
2207 struct ieee80211_rate
*rate
;
2208 struct ieee80211_hw_mode
*mode
;
2209 struct rate_control_extra extra
;
2211 struct ieee80211_sub_if_data
*sdata
;
2213 /* Remove possible STA entries from other IBSS networks. */
2214 sta_info_flush(local
, NULL
);
2216 if (local
->ops
->reset_tsf
) {
2217 /* Reset own TSF to allow time synchronization work. */
2218 local
->ops
->reset_tsf(local_to_hw(local
));
2220 memcpy(ifsta
->bssid
, bss
->bssid
, ETH_ALEN
);
2221 res
= ieee80211_if_config(dev
);
2225 local
->hw
.conf
.beacon_int
= bss
->beacon_int
>= 10 ? bss
->beacon_int
: 10;
2227 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2228 sdata
->drop_unencrypted
= bss
->capability
&
2229 WLAN_CAPABILITY_PRIVACY
? 1 : 0;
2231 res
= ieee80211_set_channel(local
, -1, bss
->freq
);
2233 if (!(local
->oper_channel
->flag
& IEEE80211_CHAN_W_IBSS
)) {
2234 printk(KERN_DEBUG
"%s: IBSS not allowed on channel %d "
2235 "(%d MHz)\n", dev
->name
, local
->hw
.conf
.channel
,
2236 local
->hw
.conf
.freq
);
2240 /* Set beacon template based on scan results */
2241 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 400);
2246 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2248 mgmt
= (struct ieee80211_mgmt
*)
2249 skb_put(skb
, 24 + sizeof(mgmt
->u
.beacon
));
2250 memset(mgmt
, 0, 24 + sizeof(mgmt
->u
.beacon
));
2251 mgmt
->frame_control
= IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
2252 IEEE80211_STYPE_BEACON
);
2253 memset(mgmt
->da
, 0xff, ETH_ALEN
);
2254 memcpy(mgmt
->sa
, dev
->dev_addr
, ETH_ALEN
);
2255 memcpy(mgmt
->bssid
, ifsta
->bssid
, ETH_ALEN
);
2256 mgmt
->u
.beacon
.beacon_int
=
2257 cpu_to_le16(local
->hw
.conf
.beacon_int
);
2258 mgmt
->u
.beacon
.capab_info
= cpu_to_le16(bss
->capability
);
2260 pos
= skb_put(skb
, 2 + ifsta
->ssid_len
);
2261 *pos
++ = WLAN_EID_SSID
;
2262 *pos
++ = ifsta
->ssid_len
;
2263 memcpy(pos
, ifsta
->ssid
, ifsta
->ssid_len
);
2265 rates
= bss
->supp_rates_len
;
2268 pos
= skb_put(skb
, 2 + rates
);
2269 *pos
++ = WLAN_EID_SUPP_RATES
;
2271 memcpy(pos
, bss
->supp_rates
, rates
);
2273 pos
= skb_put(skb
, 2 + 1);
2274 *pos
++ = WLAN_EID_DS_PARAMS
;
2276 *pos
++ = bss
->channel
;
2278 pos
= skb_put(skb
, 2 + 2);
2279 *pos
++ = WLAN_EID_IBSS_PARAMS
;
2281 /* FIX: set ATIM window based on scan results */
2285 if (bss
->supp_rates_len
> 8) {
2286 rates
= bss
->supp_rates_len
- 8;
2287 pos
= skb_put(skb
, 2 + rates
);
2288 *pos
++ = WLAN_EID_EXT_SUPP_RATES
;
2290 memcpy(pos
, &bss
->supp_rates
[8], rates
);
2293 memset(&control
, 0, sizeof(control
));
2294 memset(&extra
, 0, sizeof(extra
));
2295 extra
.mode
= local
->oper_hw_mode
;
2296 rate
= rate_control_get_rate(local
, dev
, skb
, &extra
);
2298 printk(KERN_DEBUG
"%s: Failed to determine TX rate "
2299 "for IBSS beacon\n", dev
->name
);
2302 control
.tx_rate
= (sdata
->short_preamble
&&
2303 (rate
->flags
& IEEE80211_RATE_PREAMBLE2
)) ?
2304 rate
->val2
: rate
->val
;
2305 control
.antenna_sel_tx
= local
->hw
.conf
.antenna_sel_tx
;
2306 control
.power_level
= local
->hw
.conf
.power_level
;
2307 control
.flags
|= IEEE80211_TXCTL_NO_ACK
;
2308 control
.retry_limit
= 1;
2310 ifsta
->probe_resp
= skb_copy(skb
, GFP_ATOMIC
);
2311 if (ifsta
->probe_resp
) {
2312 mgmt
= (struct ieee80211_mgmt
*)
2313 ifsta
->probe_resp
->data
;
2314 mgmt
->frame_control
=
2315 IEEE80211_FC(IEEE80211_FTYPE_MGMT
,
2316 IEEE80211_STYPE_PROBE_RESP
);
2318 printk(KERN_DEBUG
"%s: Could not allocate ProbeResp "
2319 "template for IBSS\n", dev
->name
);
2322 if (local
->ops
->beacon_update
&&
2323 local
->ops
->beacon_update(local_to_hw(local
),
2324 skb
, &control
) == 0) {
2325 printk(KERN_DEBUG
"%s: Configured IBSS beacon "
2326 "template based on scan results\n", dev
->name
);
2331 mode
= local
->oper_hw_mode
;
2332 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
2333 int bitrate
= (bss
->supp_rates
[i
] & 0x7f) * 5;
2334 if (mode
->mode
== MODE_ATHEROS_TURBO
)
2336 for (j
= 0; j
< mode
->num_rates
; j
++)
2337 if (mode
->rates
[j
].rate
== bitrate
)
2340 ifsta
->supp_rates_bits
= rates
;
2344 printk(KERN_DEBUG
"%s: Failed to configure IBSS beacon "
2345 "template\n", dev
->name
);
2349 ifsta
->state
= IEEE80211_IBSS_JOINED
;
2350 mod_timer(&ifsta
->timer
, jiffies
+ IEEE80211_IBSS_MERGE_INTERVAL
);
2352 ieee80211_rx_bss_put(dev
, bss
);
2358 static int ieee80211_sta_create_ibss(struct net_device
*dev
,
2359 struct ieee80211_if_sta
*ifsta
)
2361 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2362 struct ieee80211_sta_bss
*bss
;
2363 struct ieee80211_sub_if_data
*sdata
;
2364 struct ieee80211_hw_mode
*mode
;
2365 u8 bssid
[ETH_ALEN
], *pos
;
2369 /* Easier testing, use fixed BSSID. */
2370 memset(bssid
, 0xfe, ETH_ALEN
);
2372 /* Generate random, not broadcast, locally administered BSSID. Mix in
2373 * own MAC address to make sure that devices that do not have proper
2374 * random number generator get different BSSID. */
2375 get_random_bytes(bssid
, ETH_ALEN
);
2376 for (i
= 0; i
< ETH_ALEN
; i
++)
2377 bssid
[i
] ^= dev
->dev_addr
[i
];
2382 printk(KERN_DEBUG
"%s: Creating new IBSS network, BSSID " MAC_FMT
"\n",
2383 dev
->name
, MAC_ARG(bssid
));
2385 bss
= ieee80211_rx_bss_add(dev
, bssid
);
2389 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2390 mode
= local
->oper_hw_mode
;
2392 if (local
->hw
.conf
.beacon_int
== 0)
2393 local
->hw
.conf
.beacon_int
= 100;
2394 bss
->beacon_int
= local
->hw
.conf
.beacon_int
;
2395 bss
->hw_mode
= local
->hw
.conf
.phymode
;
2396 bss
->channel
= local
->hw
.conf
.channel
;
2397 bss
->freq
= local
->hw
.conf
.freq
;
2398 bss
->last_update
= jiffies
;
2399 bss
->capability
= WLAN_CAPABILITY_IBSS
;
2400 if (sdata
->default_key
) {
2401 bss
->capability
|= WLAN_CAPABILITY_PRIVACY
;
2403 sdata
->drop_unencrypted
= 0;
2404 bss
->supp_rates_len
= mode
->num_rates
;
2405 pos
= bss
->supp_rates
;
2406 for (i
= 0; i
< mode
->num_rates
; i
++) {
2407 int rate
= mode
->rates
[i
].rate
;
2408 if (mode
->mode
== MODE_ATHEROS_TURBO
)
2410 *pos
++ = (u8
) (rate
/ 5);
2413 return ieee80211_sta_join_ibss(dev
, ifsta
, bss
);
2417 static int ieee80211_sta_find_ibss(struct net_device
*dev
,
2418 struct ieee80211_if_sta
*ifsta
)
2420 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2421 struct ieee80211_sta_bss
*bss
;
2426 if (ifsta
->ssid_len
== 0)
2429 active_ibss
= ieee80211_sta_active_ibss(dev
);
2430 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2431 printk(KERN_DEBUG
"%s: sta_find_ibss (active_ibss=%d)\n",
2432 dev
->name
, active_ibss
);
2433 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2434 spin_lock_bh(&local
->sta_bss_lock
);
2435 list_for_each_entry(bss
, &local
->sta_bss_list
, list
) {
2436 if (ifsta
->ssid_len
!= bss
->ssid_len
||
2437 memcmp(ifsta
->ssid
, bss
->ssid
, bss
->ssid_len
) != 0
2438 || !(bss
->capability
& WLAN_CAPABILITY_IBSS
))
2440 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2441 printk(KERN_DEBUG
" bssid=" MAC_FMT
" found\n",
2442 MAC_ARG(bss
->bssid
));
2443 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2444 memcpy(bssid
, bss
->bssid
, ETH_ALEN
);
2446 if (active_ibss
|| memcmp(bssid
, ifsta
->bssid
, ETH_ALEN
) != 0)
2449 spin_unlock_bh(&local
->sta_bss_lock
);
2451 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2452 printk(KERN_DEBUG
" sta_find_ibss: selected " MAC_FMT
" current "
2453 MAC_FMT
"\n", MAC_ARG(bssid
), MAC_ARG(ifsta
->bssid
));
2454 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2455 if (found
&& memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0 &&
2456 (bss
= ieee80211_rx_bss_get(dev
, bssid
))) {
2457 printk(KERN_DEBUG
"%s: Selected IBSS BSSID " MAC_FMT
2458 " based on configured SSID\n",
2459 dev
->name
, MAC_ARG(bssid
));
2460 return ieee80211_sta_join_ibss(dev
, ifsta
, bss
);
2462 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2463 printk(KERN_DEBUG
" did not try to join ibss\n");
2464 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2466 /* Selected IBSS not found in current scan results - try to scan */
2467 if (ifsta
->state
== IEEE80211_IBSS_JOINED
&&
2468 !ieee80211_sta_active_ibss(dev
)) {
2469 mod_timer(&ifsta
->timer
, jiffies
+
2470 IEEE80211_IBSS_MERGE_INTERVAL
);
2471 } else if (time_after(jiffies
, local
->last_scan_completed
+
2472 IEEE80211_SCAN_INTERVAL
)) {
2473 printk(KERN_DEBUG
"%s: Trigger new scan to find an IBSS to "
2474 "join\n", dev
->name
);
2475 return ieee80211_sta_req_scan(dev
, ifsta
->ssid
,
2477 } else if (ifsta
->state
!= IEEE80211_IBSS_JOINED
) {
2478 int interval
= IEEE80211_SCAN_INTERVAL
;
2480 if (time_after(jiffies
, ifsta
->ibss_join_req
+
2481 IEEE80211_IBSS_JOIN_TIMEOUT
)) {
2482 if (ifsta
->create_ibss
&&
2483 local
->oper_channel
->flag
& IEEE80211_CHAN_W_IBSS
)
2484 return ieee80211_sta_create_ibss(dev
, ifsta
);
2485 if (ifsta
->create_ibss
) {
2486 printk(KERN_DEBUG
"%s: IBSS not allowed on the"
2487 " configured channel %d (%d MHz)\n",
2488 dev
->name
, local
->hw
.conf
.channel
,
2489 local
->hw
.conf
.freq
);
2492 /* No IBSS found - decrease scan interval and continue
2494 interval
= IEEE80211_SCAN_INTERVAL_SLOW
;
2497 ifsta
->state
= IEEE80211_IBSS_SEARCH
;
2498 mod_timer(&ifsta
->timer
, jiffies
+ interval
);
2506 int ieee80211_sta_set_ssid(struct net_device
*dev
, char *ssid
, size_t len
)
2508 struct ieee80211_sub_if_data
*sdata
;
2509 struct ieee80211_if_sta
*ifsta
;
2510 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2512 if (len
> IEEE80211_MAX_SSID_LEN
)
2515 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2517 if (local
->ops
->conf_tx
) {
2518 struct ieee80211_tx_queue_params qparam
;
2521 memset(&qparam
, 0, sizeof(qparam
));
2522 /* TODO: are these ok defaults for all hw_modes? */
2525 local
->hw
.conf
.phymode
== MODE_IEEE80211B
? 31 : 15;
2526 qparam
.cw_max
= 1023;
2527 qparam
.burst_time
= 0;
2528 for (i
= IEEE80211_TX_QUEUE_DATA0
; i
< NUM_TX_DATA_QUEUES
; i
++)
2530 local
->ops
->conf_tx(local_to_hw(local
),
2531 i
+ IEEE80211_TX_QUEUE_DATA0
,
2534 /* IBSS uses different parameters for Beacon sending */
2538 local
->ops
->conf_tx(local_to_hw(local
),
2539 IEEE80211_TX_QUEUE_BEACON
, &qparam
);
2542 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2543 ifsta
= &sdata
->u
.sta
;
2545 if (ifsta
->ssid_len
!= len
|| memcmp(ifsta
->ssid
, ssid
, len
) != 0)
2546 ifsta
->prev_bssid_set
= 0;
2547 memcpy(ifsta
->ssid
, ssid
, len
);
2548 memset(ifsta
->ssid
+ len
, 0, IEEE80211_MAX_SSID_LEN
- len
);
2549 ifsta
->ssid_len
= len
;
2551 ifsta
->ssid_set
= len
? 1 : 0;
2552 if (sdata
->type
== IEEE80211_IF_TYPE_IBSS
&& !ifsta
->bssid_set
) {
2553 ifsta
->ibss_join_req
= jiffies
;
2554 ifsta
->state
= IEEE80211_IBSS_SEARCH
;
2555 return ieee80211_sta_find_ibss(dev
, ifsta
);
2561 int ieee80211_sta_get_ssid(struct net_device
*dev
, char *ssid
, size_t *len
)
2563 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2564 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2565 memcpy(ssid
, ifsta
->ssid
, ifsta
->ssid_len
);
2566 *len
= ifsta
->ssid_len
;
2571 int ieee80211_sta_set_bssid(struct net_device
*dev
, u8
*bssid
)
2573 struct ieee80211_sub_if_data
*sdata
;
2574 struct ieee80211_if_sta
*ifsta
;
2577 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2578 ifsta
= &sdata
->u
.sta
;
2580 if (memcmp(ifsta
->bssid
, bssid
, ETH_ALEN
) != 0) {
2581 memcpy(ifsta
->bssid
, bssid
, ETH_ALEN
);
2582 res
= ieee80211_if_config(dev
);
2584 printk(KERN_DEBUG
"%s: Failed to config new BSSID to "
2585 "the low-level driver\n", dev
->name
);
2590 if (!is_valid_ether_addr(bssid
))
2591 ifsta
->bssid_set
= 0;
2593 ifsta
->bssid_set
= 1;
2598 static void ieee80211_send_nullfunc(struct ieee80211_local
*local
,
2599 struct ieee80211_sub_if_data
*sdata
,
2602 struct sk_buff
*skb
;
2603 struct ieee80211_hdr
*nullfunc
;
2606 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ 24);
2608 printk(KERN_DEBUG
"%s: failed to allocate buffer for nullfunc "
2609 "frame\n", sdata
->dev
->name
);
2612 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
2614 nullfunc
= (struct ieee80211_hdr
*) skb_put(skb
, 24);
2615 memset(nullfunc
, 0, 24);
2616 fc
= IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_NULLFUNC
|
2617 IEEE80211_FCTL_TODS
;
2619 fc
|= IEEE80211_FCTL_PM
;
2620 nullfunc
->frame_control
= cpu_to_le16(fc
);
2621 memcpy(nullfunc
->addr1
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
2622 memcpy(nullfunc
->addr2
, sdata
->dev
->dev_addr
, ETH_ALEN
);
2623 memcpy(nullfunc
->addr3
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
2625 ieee80211_sta_tx(sdata
->dev
, skb
, 0);
2629 void ieee80211_scan_completed(struct ieee80211_hw
*hw
)
2631 struct ieee80211_local
*local
= hw_to_local(hw
);
2632 struct net_device
*dev
= local
->scan_dev
;
2633 struct ieee80211_sub_if_data
*sdata
;
2634 union iwreq_data wrqu
;
2636 local
->last_scan_completed
= jiffies
;
2638 local
->sta_scanning
= 0;
2640 if (ieee80211_hw_config(local
))
2641 printk(KERN_DEBUG
"%s: failed to restore operational"
2642 "channel after scan\n", dev
->name
);
2644 if (!(local
->hw
.flags
& IEEE80211_HW_NO_PROBE_FILTERING
) &&
2645 ieee80211_if_config(dev
))
2646 printk(KERN_DEBUG
"%s: failed to restore operational"
2647 "BSSID after scan\n", dev
->name
);
2649 memset(&wrqu
, 0, sizeof(wrqu
));
2650 wireless_send_event(dev
, SIOCGIWSCAN
, &wrqu
, NULL
);
2652 read_lock(&local
->sub_if_lock
);
2653 list_for_each_entry(sdata
, &local
->sub_if_list
, list
) {
2655 /* No need to wake the master device. */
2656 if (sdata
->dev
== local
->mdev
)
2659 if (sdata
->type
== IEEE80211_IF_TYPE_STA
) {
2660 if (sdata
->u
.sta
.associated
)
2661 ieee80211_send_nullfunc(local
, sdata
, 0);
2662 ieee80211_sta_timer((unsigned long)sdata
);
2665 netif_wake_queue(sdata
->dev
);
2667 read_unlock(&local
->sub_if_lock
);
2669 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2670 if (sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
2671 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2672 if (!ifsta
->bssid_set
||
2673 (!ifsta
->state
== IEEE80211_IBSS_JOINED
&&
2674 !ieee80211_sta_active_ibss(dev
)))
2675 ieee80211_sta_find_ibss(dev
, ifsta
);
2678 EXPORT_SYMBOL(ieee80211_scan_completed
);
2680 void ieee80211_sta_scan_work(struct work_struct
*work
)
2682 struct ieee80211_local
*local
=
2683 container_of(work
, struct ieee80211_local
, scan_work
.work
);
2684 struct net_device
*dev
= local
->scan_dev
;
2685 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2686 struct ieee80211_hw_mode
*mode
;
2687 struct ieee80211_channel
*chan
;
2689 unsigned long next_delay
= 0;
2691 if (!local
->sta_scanning
)
2694 switch (local
->scan_state
) {
2695 case SCAN_SET_CHANNEL
:
2696 mode
= local
->scan_hw_mode
;
2697 if (local
->scan_hw_mode
->list
.next
== &local
->modes_list
&&
2698 local
->scan_channel_idx
>= mode
->num_channels
) {
2699 ieee80211_scan_completed(local_to_hw(local
));
2702 skip
= !(local
->enabled_modes
& (1 << mode
->mode
));
2703 chan
= &mode
->channels
[local
->scan_channel_idx
];
2704 if (!(chan
->flag
& IEEE80211_CHAN_W_SCAN
) ||
2705 (sdata
->type
== IEEE80211_IF_TYPE_IBSS
&&
2706 !(chan
->flag
& IEEE80211_CHAN_W_IBSS
)) ||
2707 (local
->hw_modes
& local
->enabled_modes
&
2708 (1 << MODE_IEEE80211G
) && mode
->mode
== MODE_IEEE80211B
))
2713 printk(KERN_DEBUG
"%s: scan channel %d (%d MHz)\n",
2714 dev
->name
, chan
->chan
, chan
->freq
);
2717 local
->scan_channel
= chan
;
2718 if (ieee80211_hw_config(local
)) {
2719 printk(KERN_DEBUG
"%s: failed to set channel "
2720 "%d (%d MHz) for scan\n", dev
->name
,
2721 chan
->chan
, chan
->freq
);
2726 local
->scan_channel_idx
++;
2727 if (local
->scan_channel_idx
>= local
->scan_hw_mode
->num_channels
) {
2728 if (local
->scan_hw_mode
->list
.next
!= &local
->modes_list
) {
2729 local
->scan_hw_mode
= list_entry(local
->scan_hw_mode
->list
.next
,
2730 struct ieee80211_hw_mode
,
2732 local
->scan_channel_idx
= 0;
2739 next_delay
= IEEE80211_PROBE_DELAY
+
2740 usecs_to_jiffies(local
->hw
.channel_change_time
);
2741 local
->scan_state
= SCAN_SEND_PROBE
;
2743 case SCAN_SEND_PROBE
:
2744 if (local
->scan_channel
->flag
& IEEE80211_CHAN_W_ACTIVE_SCAN
) {
2745 ieee80211_send_probe_req(dev
, NULL
, local
->scan_ssid
,
2746 local
->scan_ssid_len
);
2747 next_delay
= IEEE80211_CHANNEL_TIME
;
2749 next_delay
= IEEE80211_PASSIVE_CHANNEL_TIME
;
2750 local
->scan_state
= SCAN_SET_CHANNEL
;
2754 if (local
->sta_scanning
)
2755 queue_delayed_work(local
->hw
.workqueue
, &local
->scan_work
,
2760 static int ieee80211_sta_start_scan(struct net_device
*dev
,
2761 u8
*ssid
, size_t ssid_len
)
2763 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2764 struct ieee80211_sub_if_data
*sdata
;
2766 if (ssid_len
> IEEE80211_MAX_SSID_LEN
)
2769 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2770 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2773 * ScanType: ACTIVE, PASSIVE
2774 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2775 * a Probe frame during active scanning
2777 * MinChannelTime (>= ProbeDelay), in TU
2778 * MaxChannelTime: (>= MinChannelTime), in TU
2781 /* MLME-SCAN.confirm
2783 * ResultCode: SUCCESS, INVALID_PARAMETERS
2786 if (local
->sta_scanning
) {
2787 if (local
->scan_dev
== dev
)
2792 if (local
->ops
->hw_scan
) {
2793 int rc
= local
->ops
->hw_scan(local_to_hw(local
),
2796 local
->sta_scanning
= 1;
2797 local
->scan_dev
= dev
;
2802 local
->sta_scanning
= 1;
2804 read_lock(&local
->sub_if_lock
);
2805 list_for_each_entry(sdata
, &local
->sub_if_list
, list
) {
2807 /* Don't stop the master interface, otherwise we can't transmit
2809 if (sdata
->dev
== local
->mdev
)
2812 netif_stop_queue(sdata
->dev
);
2813 if (sdata
->type
== IEEE80211_IF_TYPE_STA
&&
2814 sdata
->u
.sta
.associated
)
2815 ieee80211_send_nullfunc(local
, sdata
, 1);
2817 read_unlock(&local
->sub_if_lock
);
2820 local
->scan_ssid_len
= ssid_len
;
2821 memcpy(local
->scan_ssid
, ssid
, ssid_len
);
2823 local
->scan_ssid_len
= 0;
2824 local
->scan_state
= SCAN_SET_CHANNEL
;
2825 local
->scan_hw_mode
= list_entry(local
->modes_list
.next
,
2826 struct ieee80211_hw_mode
,
2828 local
->scan_channel_idx
= 0;
2829 local
->scan_dev
= dev
;
2831 if (!(local
->hw
.flags
& IEEE80211_HW_NO_PROBE_FILTERING
) &&
2832 ieee80211_if_config(dev
))
2833 printk(KERN_DEBUG
"%s: failed to set BSSID for scan\n",
2836 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2837 queue_delayed_work(local
->hw
.workqueue
, &local
->scan_work
,
2838 IEEE80211_CHANNEL_TIME
);
2844 int ieee80211_sta_req_scan(struct net_device
*dev
, u8
*ssid
, size_t ssid_len
)
2846 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2847 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
2848 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2850 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
)
2851 return ieee80211_sta_start_scan(dev
, ssid
, ssid_len
);
2853 if (local
->sta_scanning
) {
2854 if (local
->scan_dev
== dev
)
2859 set_bit(IEEE80211_STA_REQ_SCAN
, &ifsta
->request
);
2860 queue_work(local
->hw
.workqueue
, &ifsta
->work
);
2865 ieee80211_sta_scan_result(struct net_device
*dev
,
2866 struct ieee80211_sta_bss
*bss
,
2867 char *current_ev
, char *end_buf
)
2869 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2870 struct iw_event iwe
;
2872 if (time_after(jiffies
,
2873 bss
->last_update
+ IEEE80211_SCAN_RESULT_EXPIRE
))
2876 if (!(local
->enabled_modes
& (1 << bss
->hw_mode
)))
2879 if (local
->scan_flags
& IEEE80211_SCAN_WPA_ONLY
&&
2880 !bss
->wpa_ie
&& !bss
->rsn_ie
)
2883 if (local
->scan_flags
& IEEE80211_SCAN_MATCH_SSID
&&
2884 (local
->scan_ssid_len
!= bss
->ssid_len
||
2885 memcmp(local
->scan_ssid
, bss
->ssid
, bss
->ssid_len
) != 0))
2888 memset(&iwe
, 0, sizeof(iwe
));
2889 iwe
.cmd
= SIOCGIWAP
;
2890 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
2891 memcpy(iwe
.u
.ap_addr
.sa_data
, bss
->bssid
, ETH_ALEN
);
2892 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2895 memset(&iwe
, 0, sizeof(iwe
));
2896 iwe
.cmd
= SIOCGIWESSID
;
2897 iwe
.u
.data
.length
= bss
->ssid_len
;
2898 iwe
.u
.data
.flags
= 1;
2899 current_ev
= iwe_stream_add_point(current_ev
, end_buf
, &iwe
,
2902 if (bss
->capability
& (WLAN_CAPABILITY_ESS
| WLAN_CAPABILITY_IBSS
)) {
2903 memset(&iwe
, 0, sizeof(iwe
));
2904 iwe
.cmd
= SIOCGIWMODE
;
2905 if (bss
->capability
& WLAN_CAPABILITY_ESS
)
2906 iwe
.u
.mode
= IW_MODE_MASTER
;
2908 iwe
.u
.mode
= IW_MODE_ADHOC
;
2909 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2913 memset(&iwe
, 0, sizeof(iwe
));
2914 iwe
.cmd
= SIOCGIWFREQ
;
2915 iwe
.u
.freq
.m
= bss
->channel
;
2917 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2919 iwe
.u
.freq
.m
= bss
->freq
* 100000;
2921 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2924 memset(&iwe
, 0, sizeof(iwe
));
2926 iwe
.u
.qual
.qual
= bss
->signal
;
2927 iwe
.u
.qual
.level
= bss
->rssi
;
2928 iwe
.u
.qual
.noise
= bss
->noise
;
2929 iwe
.u
.qual
.updated
= local
->wstats_flags
;
2930 current_ev
= iwe_stream_add_event(current_ev
, end_buf
, &iwe
,
2933 memset(&iwe
, 0, sizeof(iwe
));
2934 iwe
.cmd
= SIOCGIWENCODE
;
2935 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
2936 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
2938 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
2939 iwe
.u
.data
.length
= 0;
2940 current_ev
= iwe_stream_add_point(current_ev
, end_buf
, &iwe
, "");
2942 if (bss
&& bss
->wpa_ie
) {
2943 memset(&iwe
, 0, sizeof(iwe
));
2944 iwe
.cmd
= IWEVGENIE
;
2945 iwe
.u
.data
.length
= bss
->wpa_ie_len
;
2946 current_ev
= iwe_stream_add_point(current_ev
, end_buf
, &iwe
,
2950 if (bss
&& bss
->rsn_ie
) {
2951 memset(&iwe
, 0, sizeof(iwe
));
2952 iwe
.cmd
= IWEVGENIE
;
2953 iwe
.u
.data
.length
= bss
->rsn_ie_len
;
2954 current_ev
= iwe_stream_add_point(current_ev
, end_buf
, &iwe
,
2958 if (bss
&& bss
->supp_rates_len
> 0) {
2959 /* display all supported rates in readable format */
2960 char *p
= current_ev
+ IW_EV_LCP_LEN
;
2963 memset(&iwe
, 0, sizeof(iwe
));
2964 iwe
.cmd
= SIOCGIWRATE
;
2965 /* Those two flags are ignored... */
2966 iwe
.u
.bitrate
.fixed
= iwe
.u
.bitrate
.disabled
= 0;
2968 for (i
= 0; i
< bss
->supp_rates_len
; i
++) {
2969 iwe
.u
.bitrate
.value
= ((bss
->supp_rates
[i
] &
2971 p
= iwe_stream_add_value(current_ev
, p
,
2972 end_buf
, &iwe
, IW_EV_PARAM_LEN
);
2979 buf
= kmalloc(30, GFP_ATOMIC
);
2981 memset(&iwe
, 0, sizeof(iwe
));
2982 iwe
.cmd
= IWEVCUSTOM
;
2983 sprintf(buf
, "tsf=%016llx", (unsigned long long)(bss
->timestamp
));
2984 iwe
.u
.data
.length
= strlen(buf
);
2985 current_ev
= iwe_stream_add_point(current_ev
, end_buf
,
2994 if (!(local
->scan_flags
& IEEE80211_SCAN_EXTRA_INFO
))
2997 buf
= kmalloc(100, GFP_ATOMIC
);
3001 memset(&iwe
, 0, sizeof(iwe
));
3002 iwe
.cmd
= IWEVCUSTOM
;
3003 sprintf(buf
, "bcn_int=%d", bss
->beacon_int
);
3004 iwe
.u
.data
.length
= strlen(buf
);
3005 current_ev
= iwe_stream_add_point(current_ev
, end_buf
, &iwe
,
3008 memset(&iwe
, 0, sizeof(iwe
));
3009 iwe
.cmd
= IWEVCUSTOM
;
3010 sprintf(buf
, "capab=0x%04x", bss
->capability
);
3011 iwe
.u
.data
.length
= strlen(buf
);
3012 current_ev
= iwe_stream_add_point(current_ev
, end_buf
, &iwe
,
3023 int ieee80211_sta_scan_results(struct net_device
*dev
, char *buf
, size_t len
)
3025 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
3026 char *current_ev
= buf
;
3027 char *end_buf
= buf
+ len
;
3028 struct ieee80211_sta_bss
*bss
;
3030 spin_lock_bh(&local
->sta_bss_lock
);
3031 list_for_each_entry(bss
, &local
->sta_bss_list
, list
) {
3032 if (buf
+ len
- current_ev
<= IW_EV_ADDR_LEN
) {
3033 spin_unlock_bh(&local
->sta_bss_lock
);
3036 current_ev
= ieee80211_sta_scan_result(dev
, bss
, current_ev
,
3039 spin_unlock_bh(&local
->sta_bss_lock
);
3040 return current_ev
- buf
;
3044 int ieee80211_sta_set_extra_ie(struct net_device
*dev
, char *ie
, size_t len
)
3046 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3047 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3048 kfree(ifsta
->extra_ie
);
3050 ifsta
->extra_ie
= NULL
;
3051 ifsta
->extra_ie_len
= 0;
3054 ifsta
->extra_ie
= kmalloc(len
, GFP_KERNEL
);
3055 if (!ifsta
->extra_ie
) {
3056 ifsta
->extra_ie_len
= 0;
3059 memcpy(ifsta
->extra_ie
, ie
, len
);
3060 ifsta
->extra_ie_len
= len
;
3065 struct sta_info
* ieee80211_ibss_add_sta(struct net_device
*dev
,
3066 struct sk_buff
*skb
, u8
*bssid
,
3069 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
3070 struct sta_info
*sta
;
3071 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3073 /* TODO: Could consider removing the least recently used entry and
3074 * allow new one to be added. */
3075 if (local
->num_sta
>= IEEE80211_IBSS_MAX_STA_ENTRIES
) {
3076 if (net_ratelimit()) {
3077 printk(KERN_DEBUG
"%s: No room for a new IBSS STA "
3078 "entry " MAC_FMT
"\n", dev
->name
, MAC_ARG(addr
));
3083 printk(KERN_DEBUG
"%s: Adding new IBSS station " MAC_FMT
" (dev=%s)\n",
3084 local
->mdev
->name
, MAC_ARG(addr
), dev
->name
);
3086 sta
= sta_info_add(local
, dev
, addr
, GFP_ATOMIC
);
3090 sta
->supp_rates
= sdata
->u
.sta
.supp_rates_bits
;
3092 rate_control_rate_init(sta
, local
);
3094 return sta
; /* caller will call sta_info_put() */
3098 int ieee80211_sta_deauthenticate(struct net_device
*dev
, u16 reason
)
3100 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3101 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3103 printk(KERN_DEBUG
"%s: deauthenticate(reason=%d)\n",
3106 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
&&
3107 sdata
->type
!= IEEE80211_IF_TYPE_IBSS
)
3110 ieee80211_send_deauth(dev
, ifsta
, reason
);
3111 ieee80211_set_disassoc(dev
, ifsta
, 1);
3116 int ieee80211_sta_disassociate(struct net_device
*dev
, u16 reason
)
3118 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
3119 struct ieee80211_if_sta
*ifsta
= &sdata
->u
.sta
;
3121 printk(KERN_DEBUG
"%s: disassociate(reason=%d)\n",
3124 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
)
3127 if (!ifsta
->associated
)
3130 ieee80211_send_disassoc(dev
, ifsta
, reason
);
3131 ieee80211_set_disassoc(dev
, ifsta
, 0);