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;
322
if (use_protection != sdata->use_protection) {
323
if (net_ratelimit()) {
324
printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
327
use_protection ? "enabled" : "disabled",
328
MAC_ARG(ifsta->bssid));
330
sdata->use_protection = use_protection;
335
static void ieee80211_sta_send_associnfo(struct net_device *dev,
336
struct ieee80211_if_sta *ifsta)
341
union iwreq_data wrqu;
343
if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
346
buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
347
ifsta->assocresp_ies_len), GFP_ATOMIC);
351
len = sprintf(buf, "ASSOCINFO(");
352
if (ifsta->assocreq_ies) {
353
len += sprintf(buf + len, "ReqIEs=");
354
for (i = 0; i < ifsta->assocreq_ies_len; i++) {
355
len += sprintf(buf + len, "%02x",
356
ifsta->assocreq_ies[i]);
359
if (ifsta->assocresp_ies) {
360
if (ifsta->assocreq_ies)
361
len += sprintf(buf + len, " ");
362
len += sprintf(buf + len, "RespIEs=");
363
for (i = 0; i < ifsta->assocresp_ies_len; i++) {
364
len += sprintf(buf + len, "%02x",
365
ifsta->assocresp_ies[i]);
368
len += sprintf(buf + len, ")");
370
if (len > IW_CUSTOM_MAX) {
371
len = sprintf(buf, "ASSOCRESPIE=");
372
for (i = 0; i < ifsta->assocresp_ies_len; i++) {
373
len += sprintf(buf + len, "%02x",
374
ifsta->assocresp_ies[i]);
378
memset(&wrqu, 0, sizeof(wrqu));
379
wrqu.data.length = len;
380
wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
386
static void ieee80211_set_associated(struct net_device *dev,
387
struct ieee80211_if_sta *ifsta, int assoc)
389
union iwreq_data wrqu;
390
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
392
if (ifsta->associated == assoc)
395
ifsta->associated = assoc;
398
struct ieee80211_sub_if_data *sdata;
399
struct ieee80211_sta_bss *bss;
400
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
401
if (sdata->type != IEEE80211_IF_TYPE_STA)
404
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
406
if (bss->has_erp_value)
407
ieee80211_handle_erp_ie(dev, bss->erp_value);
408
ieee80211_rx_bss_put(dev, bss);
411
netif_carrier_on(dev);
412
ifsta->prev_bssid_set = 1;
413
memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
414
memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
415
ieee80211_sta_send_associnfo(dev, ifsta);
417
netif_carrier_off(dev);
418
sdata->use_protection = 0;
419
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
421
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
422
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
423
ifsta->last_probe = jiffies;
426
static void ieee80211_set_disassoc(struct net_device *dev,
427
struct ieee80211_if_sta *ifsta, int deauth)
430
ifsta->auth_tries = 0;
431
ifsta->assoc_tries = 0;
432
ieee80211_set_associated(dev, ifsta, 0);
435
static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
438
struct ieee80211_sub_if_data *sdata;
439
struct ieee80211_tx_packet_data *pkt_data;
441
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
442
skb->dev = sdata->local->mdev;
443
skb_set_mac_header(skb, 0);
444
skb_set_network_header(skb, 0);
445
skb_set_transport_header(skb, 0);
447
pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
448
memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
449
pkt_data->ifindex = sdata->dev->ifindex;
450
pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT);
451
pkt_data->do_not_encrypt = !encrypt;
457
static void ieee80211_send_auth(struct net_device *dev,
458
struct ieee80211_if_sta *ifsta,
459
int transaction, u8 *extra, size_t extra_len,
462
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
464
struct ieee80211_mgmt *mgmt;
466
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
467
sizeof(*mgmt) + 6 + extra_len);
469
printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
470
"frame\n", dev->name);
473
skb_reserve(skb, local->hw.extra_tx_headroom);
475
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
476
memset(mgmt, 0, 24 + 6);
477
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
478
IEEE80211_STYPE_AUTH);
480
mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
481
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
482
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
483
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
484
mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
485
mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
486
ifsta->auth_transaction = transaction + 1;
487
mgmt->u.auth.status_code = cpu_to_le16(0);
489
memcpy(skb_put(skb, extra_len), extra, extra_len);
491
ieee80211_sta_tx(dev, skb, encrypt);
495
static void ieee80211_authenticate(struct net_device *dev,
496
struct ieee80211_if_sta *ifsta)
499
if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
500
printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT
502
dev->name, MAC_ARG(ifsta->bssid));
503
ifsta->state = IEEE80211_DISABLED;
507
ifsta->state = IEEE80211_AUTHENTICATE;
508
printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n",
509
dev->name, MAC_ARG(ifsta->bssid));
511
ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
513
mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
517
static void ieee80211_send_assoc(struct net_device *dev,
518
struct ieee80211_if_sta *ifsta)
520
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
521
struct ieee80211_hw_mode *mode;
523
struct ieee80211_mgmt *mgmt;
527
struct ieee80211_sta_bss *bss;
530
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
531
sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
534
printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
535
"frame\n", dev->name);
538
skb_reserve(skb, local->hw.extra_tx_headroom);
540
mode = local->oper_hw_mode;
541
capab = ifsta->capab;
542
if (mode->mode == MODE_IEEE80211G) {
543
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
544
WLAN_CAPABILITY_SHORT_PREAMBLE;
546
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
548
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
549
capab |= WLAN_CAPABILITY_PRIVACY;
553
ieee80211_rx_bss_put(dev, bss);
556
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
558
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
559
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
560
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
562
if (ifsta->prev_bssid_set) {
564
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
565
IEEE80211_STYPE_REASSOC_REQ);
566
mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
567
mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
568
memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
572
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
573
IEEE80211_STYPE_ASSOC_REQ);
574
mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
575
mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
579
ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
580
*pos++ = WLAN_EID_SSID;
581
*pos++ = ifsta->ssid_len;
582
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
584
len = mode->num_rates;
587
pos = skb_put(skb, len + 2);
588
*pos++ = WLAN_EID_SUPP_RATES;
590
for (i = 0; i < len; i++) {
591
int rate = mode->rates[i].rate;
592
if (mode->mode == MODE_ATHEROS_TURBO)
594
*pos++ = (u8) (rate / 5);
597
if (mode->num_rates > len) {
598
pos = skb_put(skb, mode->num_rates - len + 2);
599
*pos++ = WLAN_EID_EXT_SUPP_RATES;
600
*pos++ = mode->num_rates - len;
601
for (i = len; i < mode->num_rates; i++) {
602
int rate = mode->rates[i].rate;
603
if (mode->mode == MODE_ATHEROS_TURBO)
605
*pos++ = (u8) (rate / 5);
609
if (ifsta->extra_ie) {
610
pos = skb_put(skb, ifsta->extra_ie_len);
611
memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
614
if (wmm && ifsta->wmm_enabled) {
615
pos = skb_put(skb, 9);
616
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
617
*pos++ = 7; /* len */
618
*pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
621
*pos++ = 2; /* WME */
622
*pos++ = 0; /* WME info */
623
*pos++ = 1; /* WME ver */
627
kfree(ifsta->assocreq_ies);
628
ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
629
ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC);
630
if (ifsta->assocreq_ies)
631
memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
633
ieee80211_sta_tx(dev, skb, 0);
637
static void ieee80211_send_deauth(struct net_device *dev,
638
struct ieee80211_if_sta *ifsta, u16 reason)
640
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
642
struct ieee80211_mgmt *mgmt;
644
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
646
printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
647
"frame\n", dev->name);
650
skb_reserve(skb, local->hw.extra_tx_headroom);
652
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
654
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
655
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
656
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
657
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
658
IEEE80211_STYPE_DEAUTH);
660
mgmt->u.deauth.reason_code = cpu_to_le16(reason);
662
ieee80211_sta_tx(dev, skb, 0);
666
static void ieee80211_send_disassoc(struct net_device *dev,
667
struct ieee80211_if_sta *ifsta, u16 reason)
669
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
671
struct ieee80211_mgmt *mgmt;
673
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
675
printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
676
"frame\n", dev->name);
679
skb_reserve(skb, local->hw.extra_tx_headroom);
681
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
683
memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
684
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
685
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
686
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
687
IEEE80211_STYPE_DISASSOC);
689
mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
691
ieee80211_sta_tx(dev, skb, 0);
695
static int ieee80211_privacy_mismatch(struct net_device *dev,
696
struct ieee80211_if_sta *ifsta)
698
struct ieee80211_sta_bss *bss;
701
if (!ifsta || ifsta->mixed_cell ||
702
ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE)
705
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
709
if (ieee80211_sta_wep_configured(dev) !=
710
!!(bss->capability & WLAN_CAPABILITY_PRIVACY))
713
ieee80211_rx_bss_put(dev, bss);
719
static void ieee80211_associate(struct net_device *dev,
720
struct ieee80211_if_sta *ifsta)
722
ifsta->assoc_tries++;
723
if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
724
printk(KERN_DEBUG "%s: association with AP " MAC_FMT
726
dev->name, MAC_ARG(ifsta->bssid));
727
ifsta->state = IEEE80211_DISABLED;
731
ifsta->state = IEEE80211_ASSOCIATE;
732
printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n",
733
dev->name, MAC_ARG(ifsta->bssid));
734
if (ieee80211_privacy_mismatch(dev, ifsta)) {
735
printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
736
"mixed-cell disabled - abort association\n", dev->name);
737
ifsta->state = IEEE80211_DISABLED;
741
ieee80211_send_assoc(dev, ifsta);
743
mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
747
static void ieee80211_associated(struct net_device *dev,
748
struct ieee80211_if_sta *ifsta)
750
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
751
struct sta_info *sta;
754
/* TODO: start monitoring current AP signal quality and number of
755
* missed beacons. Scan other channels every now and then and search
757
/* TODO: remove expired BSSes */
759
ifsta->state = IEEE80211_ASSOCIATED;
761
sta = iwlwifi_sta_info_get(local, ifsta->bssid);
763
printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n",
764
dev->name, MAC_ARG(ifsta->bssid));
768
if (time_after(jiffies,
769
sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
770
if (ifsta->probereq_poll) {
771
printk(KERN_DEBUG "%s: No ProbeResp from "
772
"current AP " MAC_FMT " - assume out of "
774
dev->name, MAC_ARG(ifsta->bssid));
776
sta_info_free(sta, 0);
777
ifsta->probereq_poll = 0;
779
ieee80211_send_probe_req(dev, ifsta->bssid,
781
local->scan_ssid_len);
782
ifsta->probereq_poll = 1;
785
ifsta->probereq_poll = 0;
786
if (time_after(jiffies, ifsta->last_probe +
787
IEEE80211_PROBE_INTERVAL)) {
788
ifsta->last_probe = jiffies;
789
ieee80211_send_probe_req(dev, ifsta->bssid,
794
iwlwifi_sta_info_put(sta);
797
union iwreq_data wrqu;
798
memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
799
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
800
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
801
mod_timer(&ifsta->timer, jiffies +
802
IEEE80211_MONITORING_INTERVAL + 30 * HZ);
804
mod_timer(&ifsta->timer, jiffies +
805
IEEE80211_MONITORING_INTERVAL);
810
static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
811
u8 *ssid, size_t ssid_len)
813
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
814
struct ieee80211_hw_mode *mode;
816
struct ieee80211_mgmt *mgmt;
817
u8 *pos, *supp_rates, *esupp_rates = NULL;
820
skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
822
printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
823
"request\n", dev->name);
826
skb_reserve(skb, local->hw.extra_tx_headroom);
828
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
830
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
831
IEEE80211_STYPE_PROBE_REQ);
832
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
834
memcpy(mgmt->da, dst, ETH_ALEN);
835
memcpy(mgmt->bssid, dst, ETH_ALEN);
837
memset(mgmt->da, 0xff, ETH_ALEN);
838
memset(mgmt->bssid, 0xff, ETH_ALEN);
840
pos = skb_put(skb, 2 + ssid_len);
841
*pos++ = WLAN_EID_SSID;
843
memcpy(pos, ssid, ssid_len);
845
supp_rates = skb_put(skb, 2);
846
supp_rates[0] = WLAN_EID_SUPP_RATES;
848
mode = local->oper_hw_mode;
849
for (i = 0; i < mode->num_rates; i++) {
850
struct ieee80211_rate *rate = &mode->rates[i];
851
if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
854
pos = skb_put(skb, 1);
856
} else if (supp_rates[1] == 8) {
857
esupp_rates = skb_put(skb, 3);
858
esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
860
pos = &esupp_rates[2];
862
pos = skb_put(skb, 1);
865
if (mode->mode == MODE_ATHEROS_TURBO)
866
*pos = rate->rate / 10;
868
*pos = rate->rate / 5;
871
ieee80211_sta_tx(dev, skb, 0);
875
static int ieee80211_sta_wep_configured(struct net_device *dev)
877
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
878
if (!sdata || !sdata->default_key ||
879
sdata->default_key->alg != ALG_WEP)
885
static void ieee80211_auth_completed(struct net_device *dev,
886
struct ieee80211_if_sta *ifsta)
888
printk(KERN_DEBUG "%s: authenticated\n", dev->name);
889
ifsta->authenticated = 1;
890
ieee80211_associate(dev, ifsta);
894
static void ieee80211_auth_challenge(struct net_device *dev,
895
struct ieee80211_if_sta *ifsta,
896
struct ieee80211_mgmt *mgmt,
900
struct ieee802_11_elems elems;
902
printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
903
pos = mgmt->u.auth.variable;
904
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
906
printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n",
910
if (!elems.challenge) {
911
printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
912
"frame\n", dev->name);
915
ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
916
elems.challenge_len + 2, 1);
920
static void ieee80211_rx_mgmt_auth(struct net_device *dev,
921
struct ieee80211_if_sta *ifsta,
922
struct ieee80211_mgmt *mgmt,
925
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
926
u16 auth_alg, auth_transaction, status_code;
928
if (ifsta->state != IEEE80211_AUTHENTICATE &&
929
sdata->type != IEEE80211_IF_TYPE_IBSS) {
930
printk(KERN_DEBUG "%s: authentication frame received from "
931
MAC_FMT ", but not in authenticate state - ignored\n",
932
dev->name, MAC_ARG(mgmt->sa));
937
printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
938
"received from " MAC_FMT " - ignored\n",
939
dev->name, len, MAC_ARG(mgmt->sa));
943
if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
944
memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
945
printk(KERN_DEBUG "%s: authentication frame received from "
946
"unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
947
"ignored\n", dev->name, MAC_ARG(mgmt->sa),
948
MAC_ARG(mgmt->bssid));
952
if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
953
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
954
printk(KERN_DEBUG "%s: authentication frame received from "
955
"unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
956
"ignored\n", dev->name, MAC_ARG(mgmt->sa),
957
MAC_ARG(mgmt->bssid));
961
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
962
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
963
status_code = le16_to_cpu(mgmt->u.auth.status_code);
965
printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d "
966
"transaction=%d status=%d)\n",
967
dev->name, MAC_ARG(mgmt->sa), auth_alg,
968
auth_transaction, status_code);
970
if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
971
/* IEEE 802.11 standard does not require authentication in IBSS
972
* networks and most implementations do not seem to use it.
973
* However, try to reply to authentication attempts if someone
974
* has actually implemented this.
975
* TODO: Could implement shared key authentication. */
976
if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
977
printk(KERN_DEBUG "%s: unexpected IBSS authentication "
978
"frame (alg=%d transaction=%d)\n",
979
dev->name, auth_alg, auth_transaction);
982
ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
985
if (auth_alg != ifsta->auth_alg ||
986
auth_transaction != ifsta->auth_transaction) {
987
printk(KERN_DEBUG "%s: unexpected authentication frame "
988
"(alg=%d transaction=%d)\n",
989
dev->name, auth_alg, auth_transaction);
993
if (status_code != WLAN_STATUS_SUCCESS) {
994
printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
995
"code=%d)\n", dev->name, ifsta->auth_alg, status_code);
996
if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
998
const int num_algs = ARRAY_SIZE(algs);
1000
algs[0] = algs[1] = algs[2] = 0xff;
1001
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1002
algs[0] = WLAN_AUTH_OPEN;
1003
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1004
algs[1] = WLAN_AUTH_SHARED_KEY;
1005
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1006
algs[2] = WLAN_AUTH_LEAP;
1007
if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1009
else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1013
for (i = 0; i < num_algs; i++) {
1015
if (pos >= num_algs)
1017
if (algs[pos] == ifsta->auth_alg ||
1020
if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1021
!ieee80211_sta_wep_configured(dev))
1023
ifsta->auth_alg = algs[pos];
1024
printk(KERN_DEBUG "%s: set auth_alg=%d for "
1026
dev->name, ifsta->auth_alg);
1033
switch (ifsta->auth_alg) {
1034
case WLAN_AUTH_OPEN:
1035
case WLAN_AUTH_LEAP:
1036
ieee80211_auth_completed(dev, ifsta);
1038
case WLAN_AUTH_SHARED_KEY:
1039
if (ifsta->auth_transaction == 4)
1040
ieee80211_auth_completed(dev, ifsta);
1042
ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1048
static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1049
struct ieee80211_if_sta *ifsta,
1050
struct ieee80211_mgmt *mgmt,
1056
printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1057
"received from " MAC_FMT " - ignored\n",
1058
dev->name, len, MAC_ARG(mgmt->sa));
1062
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1063
printk(KERN_DEBUG "%s: deauthentication frame received from "
1064
"unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1065
"ignored\n", dev->name, MAC_ARG(mgmt->sa),
1066
MAC_ARG(mgmt->bssid));
1070
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1072
printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT
1074
dev->name, MAC_ARG(mgmt->sa), reason_code);
1076
if (ifsta->authenticated) {
1077
printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1080
if (ifsta->state == IEEE80211_AUTHENTICATE ||
1081
ifsta->state == IEEE80211_ASSOCIATE ||
1082
ifsta->state == IEEE80211_ASSOCIATED) {
1083
ifsta->state = IEEE80211_AUTHENTICATE;
1084
mod_timer(&ifsta->timer, jiffies +
1085
IEEE80211_RETRY_AUTH_INTERVAL);
1088
ieee80211_set_disassoc(dev, ifsta, 1);
1089
ifsta->authenticated = 0;
1093
static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1094
struct ieee80211_if_sta *ifsta,
1095
struct ieee80211_mgmt *mgmt,
1101
printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1102
"received from " MAC_FMT " - ignored\n",
1103
dev->name, len, MAC_ARG(mgmt->sa));
1107
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1108
printk(KERN_DEBUG "%s: disassociation frame received from "
1109
"unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1110
"ignored\n", dev->name, MAC_ARG(mgmt->sa),
1111
MAC_ARG(mgmt->bssid));
1115
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1117
printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT
1119
dev->name, MAC_ARG(mgmt->sa), reason_code);
1121
if (ifsta->associated)
1122
printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1124
if (ifsta->state == IEEE80211_ASSOCIATED) {
1125
ifsta->state = IEEE80211_ASSOCIATE;
1126
mod_timer(&ifsta->timer, jiffies +
1127
IEEE80211_RETRY_AUTH_INTERVAL);
1130
ieee80211_set_disassoc(dev, ifsta, 0);
1134
static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1135
struct ieee80211_if_sta *ifsta,
1136
struct ieee80211_mgmt *mgmt,
1140
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1141
struct ieee80211_hw_mode *mode;
1142
struct sta_info *sta;
1144
u16 capab_info, status_code, aid;
1145
struct ieee802_11_elems elems;
1149
/* AssocResp and ReassocResp have identical structure, so process both
1150
* of them in this function. */
1152
if (ifsta->state != IEEE80211_ASSOCIATE) {
1153
printk(KERN_DEBUG "%s: association frame received from "
1154
MAC_FMT ", but not in associate state - ignored\n",
1155
dev->name, MAC_ARG(mgmt->sa));
1160
printk(KERN_DEBUG "%s: too short (%zd) association frame "
1161
"received from " MAC_FMT " - ignored\n",
1162
dev->name, len, MAC_ARG(mgmt->sa));
1166
if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1167
printk(KERN_DEBUG "%s: association frame received from "
1168
"unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - "
1169
"ignored\n", dev->name, MAC_ARG(mgmt->sa),
1170
MAC_ARG(mgmt->bssid));
1174
capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1175
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1176
aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1177
if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1178
printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1179
"set\n", dev->name, aid);
1180
aid &= ~(BIT(15) | BIT(14));
1182
printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x "
1183
"status=%d aid=%d)\n",
1184
dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa),
1185
capab_info, status_code, aid);
1187
if (status_code != WLAN_STATUS_SUCCESS) {
1188
printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1189
dev->name, status_code);
1190
if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC)
1191
ifsta->prev_bssid_set = 0;
1195
pos = mgmt->u.assoc_resp.variable;
1196
if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1198
printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1203
if (!elems.supp_rates) {
1204
printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1209
/* it probably doesn't, but if the frame includes an ERP value then
1210
* update our stored copy */
1211
if (elems.erp_info && elems.erp_info_len >= 1) {
1212
struct ieee80211_sta_bss *bss
1213
= ieee80211_rx_bss_get(dev, ifsta->bssid);
1215
bss->erp_value = elems.erp_info[0];
1216
bss->has_erp_value = 1;
1217
ieee80211_rx_bss_put(dev, bss);
1221
printk(KERN_DEBUG "%s: associated\n", dev->name);
1223
ifsta->ap_capab = capab_info;
1225
kfree(ifsta->assocresp_ies);
1226
ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1227
ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1228
if (ifsta->assocresp_ies)
1229
memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1231
ieee80211_set_associated(dev, ifsta, 1);
1233
/* Add STA entry for the AP */
1234
sta = iwlwifi_sta_info_get(local, ifsta->bssid);
1236
struct ieee80211_sta_bss *bss;
1237
sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1239
printk(KERN_DEBUG "%s: failed to add STA entry for the"
1240
" AP\n", dev->name);
1243
bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1245
sta->last_rssi = bss->rssi;
1246
sta->last_signal = bss->signal;
1247
sta->last_noise = bss->noise;
1248
ieee80211_rx_bss_put(dev, bss);
1253
sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1257
mode = local->oper_hw_mode;
1258
for (i = 0; i < elems.supp_rates_len; i++) {
1259
int rate = (elems.supp_rates[i] & 0x7f) * 5;
1260
if (mode->mode == MODE_ATHEROS_TURBO)
1262
for (j = 0; j < mode->num_rates; j++)
1263
if (mode->rates[j].rate == rate)
1266
for (i = 0; i < elems.ext_supp_rates_len; i++) {
1267
int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1268
if (mode->mode == MODE_ATHEROS_TURBO)
1270
for (j = 0; j < mode->num_rates; j++)
1271
if (mode->rates[j].rate == rate)
1274
sta->supp_rates = rates;
1276
rate_control_rate_init(sta, local);
1278
if (elems.wmm_param && ifsta->wmm_enabled) {
1279
sta->flags |= WLAN_STA_WME;
1280
ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1281
elems.wmm_param_len);
1285
iwlwifi_sta_info_put(sta);
1287
ieee80211_associated(dev, ifsta);
1291
/* Caller must hold local->sta_bss_lock */
1292
static void iwlwifi___ieee80211_rx_bss_hash_add(struct net_device *dev,
1293
struct ieee80211_sta_bss *bss)
1295
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1296
bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1297
local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1301
/* Caller must hold local->sta_bss_lock */
1302
static void iwlwifi___ieee80211_rx_bss_hash_del(struct net_device *dev,
1303
struct ieee80211_sta_bss *bss)
1305
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1306
struct ieee80211_sta_bss *b, *prev = NULL;
1307
b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1311
local->sta_bss_hash[STA_HASH(bss->bssid)] =
1314
prev->hnext = bss->hnext;
1323
static struct ieee80211_sta_bss *
1324
ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1326
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1327
struct ieee80211_sta_bss *bss;
1329
bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1332
atomic_inc(&bss->users);
1333
atomic_inc(&bss->users);
1334
memcpy(bss->bssid, bssid, ETH_ALEN);
1336
spin_lock_bh(&local->sta_bss_lock);
1337
/* TODO: order by RSSI? */
1338
list_add_tail(&bss->list, &local->sta_bss_list);
1339
iwlwifi___ieee80211_rx_bss_hash_add(dev, bss);
1340
spin_unlock_bh(&local->sta_bss_lock);
1345
static struct ieee80211_sta_bss *
1346
ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1348
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1349
struct ieee80211_sta_bss *bss;
1351
spin_lock_bh(&local->sta_bss_lock);
1352
bss = local->sta_bss_hash[STA_HASH(bssid)];
1354
if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1355
atomic_inc(&bss->users);
1360
spin_unlock_bh(&local->sta_bss_lock);
1365
static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1374
static void ieee80211_rx_bss_put(struct net_device *dev,
1375
struct ieee80211_sta_bss *bss)
1377
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1378
if (!atomic_dec_and_test(&bss->users))
1381
spin_lock_bh(&local->sta_bss_lock);
1382
iwlwifi___ieee80211_rx_bss_hash_del(dev, bss);
1383
list_del(&bss->list);
1384
spin_unlock_bh(&local->sta_bss_lock);
1385
ieee80211_rx_bss_free(bss);
1389
void ieee80211_rx_bss_list_init(struct net_device *dev)
1391
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1392
spin_lock_init(&local->sta_bss_lock);
1393
INIT_LIST_HEAD(&local->sta_bss_list);
1397
void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1399
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1400
struct ieee80211_sta_bss *bss, *tmp;
1402
list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1403
ieee80211_rx_bss_put(dev, bss);
1407
static void ieee80211_rx_bss_info(struct net_device *dev,
1408
struct ieee80211_mgmt *mgmt,
1410
struct ieee80211_rx_status *rx_status,
1413
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1414
struct ieee802_11_elems elems;
1416
int channel, invalid = 0, clen;
1417
struct ieee80211_sta_bss *bss;
1418
struct sta_info *sta;
1419
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1422
if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1423
return; /* ignore ProbeResp to foreign address */
1426
printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1427
dev->name, beacon ? "Beacon" : "Probe Response",
1428
MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1431
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1435
timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1437
if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1438
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1439
#ifdef CONFIG_MAC80211_IBSS_DEBUG
1440
static unsigned long last_tsf_debug = 0;
1442
if (local->ops->get_tsf)
1443
tsf = local->ops->get_tsf(local_to_hw(local));
1446
if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1447
printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1448
MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1450
MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1451
(unsigned long long)tsf,
1452
(unsigned long long)timestamp,
1453
(unsigned long long)(tsf - timestamp),
1455
last_tsf_debug = jiffies;
1457
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1460
if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1461
&elems) == ParseFailed)
1464
if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1465
memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1466
(sta = iwlwifi_sta_info_get(local, mgmt->sa))) {
1467
struct ieee80211_hw_mode *mode;
1468
struct ieee80211_rate *rates;
1470
u32 supp_rates, prev_rates;
1473
mode = local->sta_scanning ?
1474
local->scan_hw_mode : local->oper_hw_mode;
1475
rates = mode->rates;
1476
num_rates = mode->num_rates;
1479
for (i = 0; i < elems.supp_rates_len +
1480
elems.ext_supp_rates_len; i++) {
1483
if (i < elems.supp_rates_len)
1484
rate = elems.supp_rates[i];
1485
else if (elems.ext_supp_rates)
1486
rate = elems.ext_supp_rates
1487
[i - elems.supp_rates_len];
1488
own_rate = 5 * (rate & 0x7f);
1489
if (mode->mode == MODE_ATHEROS_TURBO)
1491
for (j = 0; j < num_rates; j++)
1492
if (rates[j].rate == own_rate)
1493
supp_rates |= BIT(j);
1496
prev_rates = sta->supp_rates;
1497
sta->supp_rates &= supp_rates;
1498
if (sta->supp_rates == 0) {
1499
/* No matching rates - this should not really happen.
1500
* Make sure that at least one rate is marked
1501
* supported to avoid issues with TX rate ctrl. */
1502
sta->supp_rates = sdata->u.sta.supp_rates_bits;
1504
if (sta->supp_rates != prev_rates) {
1505
printk(KERN_DEBUG "%s: updated supp_rates set for "
1506
MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1508
dev->name, MAC_ARG(sta->addr), prev_rates,
1509
supp_rates, sta->supp_rates);
1511
iwlwifi_sta_info_put(sta);
1517
if (elems.ds_params && elems.ds_params_len == 1)
1518
channel = elems.ds_params[0];
1520
channel = rx_status->channel;
1522
bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1524
bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1529
/* TODO: order by RSSI? */
1530
spin_lock_bh(&local->sta_bss_lock);
1531
list_move_tail(&bss->list, &local->sta_bss_list);
1532
spin_unlock_bh(&local->sta_bss_lock);
1536
if (bss->probe_resp && beacon) {
1537
/* Do not allow beacon to override data from Probe Response. */
1538
ieee80211_rx_bss_put(dev, bss);
1542
/* save the ERP value so that it is available at association time */
1543
if (elems.erp_info && elems.erp_info_len >= 1) {
1544
bss->erp_value = elems.erp_info[0];
1545
bss->has_erp_value = 1;
1548
bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1549
bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1550
if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1551
memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1552
bss->ssid_len = elems.ssid_len;
1555
bss->supp_rates_len = 0;
1556
if (elems.supp_rates) {
1557
clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1558
if (clen > elems.supp_rates_len)
1559
clen = elems.supp_rates_len;
1560
memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1562
bss->supp_rates_len += clen;
1564
if (elems.ext_supp_rates) {
1565
clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1566
if (clen > elems.ext_supp_rates_len)
1567
clen = elems.ext_supp_rates_len;
1568
memcpy(&bss->supp_rates[bss->supp_rates_len],
1569
elems.ext_supp_rates, clen);
1570
bss->supp_rates_len += clen;
1574
(!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1575
memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1577
bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1579
memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1580
bss->wpa_ie_len = elems.wpa_len + 2;
1582
bss->wpa_ie_len = 0;
1583
} else if (!elems.wpa && bss->wpa_ie) {
1586
bss->wpa_ie_len = 0;
1590
(!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1591
memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1593
bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1595
memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1596
bss->rsn_ie_len = elems.rsn_len + 2;
1598
bss->rsn_ie_len = 0;
1599
} else if (!elems.rsn && bss->rsn_ie) {
1602
bss->rsn_ie_len = 0;
1605
if (elems.wmm_param &&
1606
(!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1607
memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1609
bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1611
memcpy(bss->wmm_ie, elems.wmm_param - 2,
1612
elems.wmm_param_len + 2);
1613
bss->wmm_ie_len = elems.wmm_param_len + 2;
1615
bss->wmm_ie_len = 0;
1616
} else if (!elems.wmm_param && bss->wmm_ie) {
1619
bss->wmm_ie_len = 0;
1623
bss->hw_mode = rx_status->phymode;
1624
bss->channel = channel;
1625
bss->freq = rx_status->freq;
1626
if (channel != rx_status->channel &&
1627
(bss->hw_mode == MODE_IEEE80211G ||
1628
bss->hw_mode == MODE_IEEE80211B) &&
1629
channel >= 1 && channel <= 14) {
1630
static const int freq_list[] = {
1631
2412, 2417, 2422, 2427, 2432, 2437, 2442,
1632
2447, 2452, 2457, 2462, 2467, 2472, 2484
1634
/* IEEE 802.11g/b mode can receive packets from neighboring
1635
* channels, so map the channel into frequency. */
1636
bss->freq = freq_list[channel - 1];
1638
bss->timestamp = timestamp;
1639
bss->last_update = jiffies;
1640
bss->rssi = rx_status->ssi;
1641
bss->signal = rx_status->signal;
1642
bss->noise = rx_status->noise;
1645
ieee80211_rx_bss_put(dev, bss);
1649
static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1650
struct ieee80211_mgmt *mgmt,
1652
struct ieee80211_rx_status *rx_status)
1654
ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1658
static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1659
struct ieee80211_mgmt *mgmt,
1661
struct ieee80211_rx_status *rx_status)
1663
struct ieee80211_sub_if_data *sdata;
1664
struct ieee80211_if_sta *ifsta;
1666
struct ieee802_11_elems elems;
1668
ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1670
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1671
if (sdata->type != IEEE80211_IF_TYPE_STA)
1673
ifsta = &sdata->u.sta;
1675
if (!ifsta->associated ||
1676
memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1679
/* Process beacon from the current BSS */
1680
baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1684
if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1685
&elems) == ParseFailed)
1688
if (elems.erp_info && elems.erp_info_len >= 1)
1689
ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1691
if (elems.wmm_param && ifsta->wmm_enabled) {
1692
ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1693
elems.wmm_param_len);
1698
static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1699
struct ieee80211_if_sta *ifsta,
1700
struct ieee80211_mgmt *mgmt,
1702
struct ieee80211_rx_status *rx_status)
1704
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1705
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1707
struct sk_buff *skb;
1708
struct ieee80211_mgmt *resp;
1711
if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1712
ifsta->state != IEEE80211_IBSS_JOINED ||
1713
len < 24 + 2 || !ifsta->probe_resp)
1716
if (local->ops->tx_last_beacon)
1717
tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1721
#ifdef CONFIG_MAC80211_IBSS_DEBUG
1722
printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1723
MAC_FMT " (tx_last_beacon=%d)\n",
1724
dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1725
MAC_ARG(mgmt->bssid), tx_last_beacon);
1726
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1728
if (!tx_last_beacon)
1731
if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1732
memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1735
end = ((u8 *) mgmt) + len;
1736
pos = mgmt->u.probe_req.variable;
1737
if (pos[0] != WLAN_EID_SSID ||
1738
pos + 2 + pos[1] > end) {
1739
if (net_ratelimit()) {
1740
printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1741
"from " MAC_FMT "\n",
1742
dev->name, MAC_ARG(mgmt->sa));
1747
(pos[1] != ifsta->ssid_len ||
1748
memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1749
/* Ignore ProbeReq for foreign SSID */
1753
/* Reply with ProbeResp */
1754
skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1758
resp = (struct ieee80211_mgmt *) skb->data;
1759
memcpy(resp->da, mgmt->sa, ETH_ALEN);
1760
#ifdef CONFIG_MAC80211_IBSS_DEBUG
1761
printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1762
dev->name, MAC_ARG(resp->da));
1763
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1764
ieee80211_sta_tx(dev, skb, 0);
1768
void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1769
struct ieee80211_rx_status *rx_status)
1771
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1772
struct ieee80211_sub_if_data *sdata;
1773
struct ieee80211_if_sta *ifsta;
1774
struct ieee80211_mgmt *mgmt;
1780
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1781
ifsta = &sdata->u.sta;
1783
mgmt = (struct ieee80211_mgmt *) skb->data;
1784
fc = le16_to_cpu(mgmt->frame_control);
1786
switch (fc & IEEE80211_FCTL_STYPE) {
1787
case IEEE80211_STYPE_PROBE_REQ:
1788
case IEEE80211_STYPE_PROBE_RESP:
1789
case IEEE80211_STYPE_BEACON:
1790
memcpy(skb->cb, rx_status, sizeof(*rx_status));
1791
case IEEE80211_STYPE_AUTH:
1792
case IEEE80211_STYPE_ASSOC_RESP:
1793
case IEEE80211_STYPE_REASSOC_RESP:
1794
case IEEE80211_STYPE_DEAUTH:
1795
case IEEE80211_STYPE_DISASSOC:
1796
skb_queue_tail(&ifsta->skb_queue, skb);
1797
queue_work(local->hw.workqueue, &ifsta->work);
1800
printk(KERN_DEBUG "%s: received unknown management frame - "
1801
"stype=%d\n", dev->name,
1802
(fc & IEEE80211_FCTL_STYPE) >> 4);
1811
static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1812
struct sk_buff *skb)
1814
struct ieee80211_rx_status *rx_status;
1815
struct ieee80211_sub_if_data *sdata;
1816
struct ieee80211_if_sta *ifsta;
1817
struct ieee80211_mgmt *mgmt;
1820
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1821
ifsta = &sdata->u.sta;
1823
rx_status = (struct ieee80211_rx_status *) skb->cb;
1824
mgmt = (struct ieee80211_mgmt *) skb->data;
1825
fc = le16_to_cpu(mgmt->frame_control);
1827
switch (fc & IEEE80211_FCTL_STYPE) {
1828
case IEEE80211_STYPE_PROBE_REQ:
1829
ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1832
case IEEE80211_STYPE_PROBE_RESP:
1833
ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1835
case IEEE80211_STYPE_BEACON:
1836
ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1838
case IEEE80211_STYPE_AUTH:
1839
ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1841
case IEEE80211_STYPE_ASSOC_RESP:
1842
ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1844
case IEEE80211_STYPE_REASSOC_RESP:
1845
ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1847
case IEEE80211_STYPE_DEAUTH:
1848
ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1850
case IEEE80211_STYPE_DISASSOC:
1851
ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1859
void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1860
struct ieee80211_rx_status *rx_status)
1862
struct ieee80211_mgmt *mgmt;
1865
if (skb->len < 24) {
1870
mgmt = (struct ieee80211_mgmt *) skb->data;
1871
fc = le16_to_cpu(mgmt->frame_control);
1873
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1874
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1875
ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1876
skb->len, rx_status);
1877
} else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1878
ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1887
static int ieee80211_sta_active_ibss(struct net_device *dev)
1889
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1891
struct sta_info *sta;
1893
spin_lock_bh(&local->sta_lock);
1894
list_for_each_entry(sta, &local->sta_list, list) {
1895
if (sta->dev == dev &&
1896
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1902
spin_unlock_bh(&local->sta_lock);
1908
static void ieee80211_sta_expire(struct net_device *dev)
1910
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1911
struct sta_info *sta, *tmp;
1913
spin_lock_bh(&local->sta_lock);
1914
list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1915
if (time_after(jiffies, sta->last_rx +
1916
IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1917
printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1918
"\n", dev->name, MAC_ARG(sta->addr));
1919
sta_info_free(sta, 1);
1921
spin_unlock_bh(&local->sta_lock);
1925
static void ieee80211_sta_merge_ibss(struct net_device *dev,
1926
struct ieee80211_if_sta *ifsta)
1928
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1930
ieee80211_sta_expire(dev);
1931
if (ieee80211_sta_active_ibss(dev))
1934
printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1935
"IBSS networks with same SSID (merge)\n", dev->name);
1936
ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1940
void ieee80211_sta_timer(unsigned long data)
1942
struct ieee80211_sub_if_data *sdata =
1943
(struct ieee80211_sub_if_data *) data;
1944
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1945
struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1947
set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1948
queue_work(local->hw.workqueue, &ifsta->work);
1952
void ieee80211_sta_work(struct work_struct *work)
1954
struct ieee80211_sub_if_data *sdata =
1955
container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1956
struct net_device *dev = sdata->dev;
1957
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1958
struct ieee80211_if_sta *ifsta;
1959
struct sk_buff *skb;
1961
if (!netif_running(dev))
1964
if (local->sta_scanning)
1967
if (sdata->type != IEEE80211_IF_TYPE_STA &&
1968
sdata->type != IEEE80211_IF_TYPE_IBSS) {
1969
printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1970
"(type=%d)\n", dev->name, sdata->type);
1973
ifsta = &sdata->u.sta;
1975
while ((skb = skb_dequeue(&ifsta->skb_queue)))
1976
ieee80211_sta_rx_queued_mgmt(dev, skb);
1978
if (ifsta->state != IEEE80211_AUTHENTICATE &&
1979
ifsta->state != IEEE80211_ASSOCIATE &&
1980
test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1981
ieee80211_sta_start_scan(dev, NULL, 0);
1985
if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1986
if (ieee80211_sta_config_auth(dev, ifsta))
1988
clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1989
} else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
1992
switch (ifsta->state) {
1993
case IEEE80211_DISABLED:
1995
case IEEE80211_AUTHENTICATE:
1996
ieee80211_authenticate(dev, ifsta);
1998
case IEEE80211_ASSOCIATE:
1999
ieee80211_associate(dev, ifsta);
2001
case IEEE80211_ASSOCIATED:
2002
ieee80211_associated(dev, ifsta);
2004
case IEEE80211_IBSS_SEARCH:
2005
ieee80211_sta_find_ibss(dev, ifsta);
2007
case IEEE80211_IBSS_JOINED:
2008
ieee80211_sta_merge_ibss(dev, ifsta);
2011
printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2016
if (ieee80211_privacy_mismatch(dev, ifsta)) {
2017
printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2018
"mixed-cell disabled - disassociate\n", dev->name);
2020
ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2021
ieee80211_set_disassoc(dev, ifsta, 0);
2026
static void ieee80211_sta_reset_auth(struct net_device *dev,
2027
struct ieee80211_if_sta *ifsta)
2029
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2031
if (local->ops->reset_tsf) {
2032
/* Reset own TSF to allow time synchronization work. */
2033
local->ops->reset_tsf(local_to_hw(local));
2036
ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2039
if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2040
ifsta->auth_alg = WLAN_AUTH_OPEN;
2041
else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2042
ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2043
else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2044
ifsta->auth_alg = WLAN_AUTH_LEAP;
2046
ifsta->auth_alg = WLAN_AUTH_OPEN;
2047
printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2049
ifsta->auth_transaction = -1;
2050
ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2051
netif_carrier_off(dev);
2055
void ieee80211_sta_req_auth(struct net_device *dev,
2056
struct ieee80211_if_sta *ifsta)
2058
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2059
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2061
if (sdata->type != IEEE80211_IF_TYPE_STA)
2064
if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2065
(ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2066
set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2067
queue_work(local->hw.workqueue, &ifsta->work);
2071
static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2072
const char *ssid, int ssid_len)
2074
int tmp, hidden_ssid;
2076
if (!memcmp(ifsta->ssid, ssid, ssid_len))
2079
if (ifsta->auto_bssid_sel)
2085
if (ssid[tmp] != '\0') {
2091
if (hidden_ssid && ifsta->ssid_len == ssid_len)
2094
if (ssid_len == 1 && ssid[0] == ' ')
2100
static int ieee80211_sta_config_auth(struct net_device *dev,
2101
struct ieee80211_if_sta *ifsta)
2103
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2104
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2105
struct ieee80211_sta_bss *bss, *selected = NULL;
2106
int top_rssi = 0, freq;
2108
if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2109
!ifsta->auto_ssid_sel) {
2110
ifsta->state = IEEE80211_AUTHENTICATE;
2111
ieee80211_sta_reset_auth(dev, ifsta);
2115
spin_lock_bh(&local->sta_bss_lock);
2116
freq = local->oper_channel->freq;
2117
list_for_each_entry(bss, &local->sta_bss_list, list) {
2118
if (!(bss->capability & WLAN_CAPABILITY_ESS))
2121
if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2122
!!sdata->default_key)
2125
if (!ifsta->auto_channel_sel && bss->freq != freq)
2128
if (!ifsta->auto_bssid_sel &&
2129
memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2132
if (!ifsta->auto_ssid_sel &&
2133
!ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2136
if (!selected || top_rssi < bss->rssi) {
2138
top_rssi = bss->rssi;
2142
atomic_inc(&selected->users);
2143
spin_unlock_bh(&local->sta_bss_lock);
2146
ieee80211_set_channel(local, -1, selected->freq);
2147
if (!ifsta->ssid_set)
2148
ieee80211_sta_set_ssid(dev, selected->ssid,
2149
selected->ssid_len);
2150
ieee80211_sta_set_bssid(dev, selected->bssid);
2151
ieee80211_rx_bss_put(dev, selected);
2152
ifsta->state = IEEE80211_AUTHENTICATE;
2153
ieee80211_sta_reset_auth(dev, ifsta);
2156
if (ifsta->state != IEEE80211_AUTHENTICATE) {
2157
if (ifsta->auto_ssid_sel)
2158
ieee80211_sta_start_scan(dev, NULL, 0);
2160
ieee80211_sta_start_scan(dev, ifsta->ssid,
2162
ifsta->state = IEEE80211_AUTHENTICATE;
2163
set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2165
ifsta->state = IEEE80211_DISABLED;
2170
static int ieee80211_sta_join_ibss(struct net_device *dev,
2171
struct ieee80211_if_sta *ifsta,
2172
struct ieee80211_sta_bss *bss)
2174
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2175
int res, rates, i, j;
2176
struct sk_buff *skb;
2177
struct ieee80211_mgmt *mgmt;
2178
struct ieee80211_tx_control control;
2179
struct ieee80211_rate *rate;
2180
struct ieee80211_hw_mode *mode;
2181
struct rate_control_extra extra;
2183
struct ieee80211_sub_if_data *sdata;
2185
/* Remove possible STA entries from other IBSS networks. */
2186
sta_info_flush(local, NULL);
2188
if (local->ops->reset_tsf) {
2189
/* Reset own TSF to allow time synchronization work. */
2190
local->ops->reset_tsf(local_to_hw(local));
2192
memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2193
res = ieee80211_if_config(dev);
2197
local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2199
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2200
sdata->drop_unencrypted = bss->capability &
2201
WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2203
res = ieee80211_set_channel(local, -1, bss->freq);
2205
if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2206
printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2207
"(%d MHz)\n", dev->name, local->hw.conf.channel,
2208
local->hw.conf.freq);
2212
/* Set beacon template based on scan results */
2213
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2218
skb_reserve(skb, local->hw.extra_tx_headroom);
2220
mgmt = (struct ieee80211_mgmt *)
2221
skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2222
memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2223
mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2224
IEEE80211_STYPE_BEACON);
2225
memset(mgmt->da, 0xff, ETH_ALEN);
2226
memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2227
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2228
mgmt->u.beacon.beacon_int =
2229
cpu_to_le16(local->hw.conf.beacon_int);
2230
mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2232
pos = skb_put(skb, 2 + ifsta->ssid_len);
2233
*pos++ = WLAN_EID_SSID;
2234
*pos++ = ifsta->ssid_len;
2235
memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2237
rates = bss->supp_rates_len;
2240
pos = skb_put(skb, 2 + rates);
2241
*pos++ = WLAN_EID_SUPP_RATES;
2243
memcpy(pos, bss->supp_rates, rates);
2245
pos = skb_put(skb, 2 + 1);
2246
*pos++ = WLAN_EID_DS_PARAMS;
2248
*pos++ = bss->channel;
2250
pos = skb_put(skb, 2 + 2);
2251
*pos++ = WLAN_EID_IBSS_PARAMS;
2253
/* FIX: set ATIM window based on scan results */
2257
if (bss->supp_rates_len > 8) {
2258
rates = bss->supp_rates_len - 8;
2259
pos = skb_put(skb, 2 + rates);
2260
*pos++ = WLAN_EID_EXT_SUPP_RATES;
2262
memcpy(pos, &bss->supp_rates[8], rates);
2265
memset(&control, 0, sizeof(control));
2266
memset(&extra, 0, sizeof(extra));
2267
extra.mode = local->oper_hw_mode;
2268
rate = rate_control_get_rate(local, dev, skb, &extra);
2270
printk(KERN_DEBUG "%s: Failed to determine TX rate "
2271
"for IBSS beacon\n", dev->name);
2274
control.tx_rate = (local->short_preamble &&
2275
(rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2276
rate->val2 : rate->val;
2277
control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2278
control.power_level = local->hw.conf.power_level;
2279
control.flags |= IEEE80211_TXCTL_NO_ACK;
2280
control.retry_limit = 1;
2282
ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2283
if (ifsta->probe_resp) {
2284
mgmt = (struct ieee80211_mgmt *)
2285
ifsta->probe_resp->data;
2286
mgmt->frame_control =
2287
IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2288
IEEE80211_STYPE_PROBE_RESP);
2290
printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2291
"template for IBSS\n", dev->name);
2294
if (local->ops->beacon_update &&
2295
local->ops->beacon_update(local_to_hw(local),
2296
skb, &control) == 0) {
2297
printk(KERN_DEBUG "%s: Configured IBSS beacon "
2298
"template based on scan results\n", dev->name);
2303
mode = local->oper_hw_mode;
2304
for (i = 0; i < bss->supp_rates_len; i++) {
2305
int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2306
if (mode->mode == MODE_ATHEROS_TURBO)
2308
for (j = 0; j < mode->num_rates; j++)
2309
if (mode->rates[j].rate == bitrate)
2312
ifsta->supp_rates_bits = rates;
2316
printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2317
"template\n", dev->name);
2321
ifsta->state = IEEE80211_IBSS_JOINED;
2322
mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2324
ieee80211_rx_bss_put(dev, bss);
2330
static int ieee80211_sta_create_ibss(struct net_device *dev,
2331
struct ieee80211_if_sta *ifsta)
2333
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2334
struct ieee80211_sta_bss *bss;
2335
struct ieee80211_sub_if_data *sdata;
2336
struct ieee80211_hw_mode *mode;
2337
u8 bssid[ETH_ALEN], *pos;
2341
/* Easier testing, use fixed BSSID. */
2342
memset(bssid, 0xfe, ETH_ALEN);
2344
/* Generate random, not broadcast, locally administered BSSID. Mix in
2345
* own MAC address to make sure that devices that do not have proper
2346
* random number generator get different BSSID. */
2347
get_random_bytes(bssid, ETH_ALEN);
2348
for (i = 0; i < ETH_ALEN; i++)
2349
bssid[i] ^= dev->dev_addr[i];
2354
printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2355
dev->name, MAC_ARG(bssid));
2357
bss = ieee80211_rx_bss_add(dev, bssid);
2361
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2362
mode = local->oper_hw_mode;
2364
if (local->hw.conf.beacon_int == 0)
2365
local->hw.conf.beacon_int = 100;
2366
bss->beacon_int = local->hw.conf.beacon_int;
2367
bss->hw_mode = local->hw.conf.phymode;
2368
bss->channel = local->hw.conf.channel;
2369
bss->freq = local->hw.conf.freq;
2370
bss->last_update = jiffies;
2371
bss->capability = WLAN_CAPABILITY_IBSS;
2372
if (sdata->default_key) {
2373
bss->capability |= WLAN_CAPABILITY_PRIVACY;
2375
sdata->drop_unencrypted = 0;
2376
bss->supp_rates_len = mode->num_rates;
2377
pos = bss->supp_rates;
2378
for (i = 0; i < mode->num_rates; i++) {
2379
int rate = mode->rates[i].rate;
2380
if (mode->mode == MODE_ATHEROS_TURBO)
2382
*pos++ = (u8) (rate / 5);
2385
return ieee80211_sta_join_ibss(dev, ifsta, bss);
2389
static int ieee80211_sta_find_ibss(struct net_device *dev,
2390
struct ieee80211_if_sta *ifsta)
2392
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2393
struct ieee80211_sta_bss *bss;
2398
if (ifsta->ssid_len == 0)
2401
active_ibss = ieee80211_sta_active_ibss(dev);
2402
#ifdef CONFIG_MAC80211_IBSS_DEBUG
2403
printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2404
dev->name, active_ibss);
2405
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2406
spin_lock_bh(&local->sta_bss_lock);
2407
list_for_each_entry(bss, &local->sta_bss_list, list) {
2408
if (ifsta->ssid_len != bss->ssid_len ||
2409
memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2410
|| !(bss->capability & WLAN_CAPABILITY_IBSS))
2412
#ifdef CONFIG_MAC80211_IBSS_DEBUG
2413
printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2414
MAC_ARG(bss->bssid));
2415
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2416
memcpy(bssid, bss->bssid, ETH_ALEN);
2418
if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2421
spin_unlock_bh(&local->sta_bss_lock);
2423
#ifdef CONFIG_MAC80211_IBSS_DEBUG
2424
printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2425
MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2426
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2427
if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2428
(bss = ieee80211_rx_bss_get(dev, bssid))) {
2429
printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2430
" based on configured SSID\n",
2431
dev->name, MAC_ARG(bssid));
2432
return ieee80211_sta_join_ibss(dev, ifsta, bss);
2434
#ifdef CONFIG_MAC80211_IBSS_DEBUG
2435
printk(KERN_DEBUG " did not try to join ibss\n");
2436
#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2438
/* Selected IBSS not found in current scan results - try to scan */
2439
if (ifsta->state == IEEE80211_IBSS_JOINED &&
2440
!ieee80211_sta_active_ibss(dev)) {
2441
mod_timer(&ifsta->timer, jiffies +
2442
IEEE80211_IBSS_MERGE_INTERVAL);
2443
} else if (time_after(jiffies, local->last_scan_completed +
2444
IEEE80211_SCAN_INTERVAL)) {
2445
printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2446
"join\n", dev->name);
2447
return ieee80211_sta_req_scan(dev, ifsta->ssid,
2449
} else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2450
int interval = IEEE80211_SCAN_INTERVAL;
2452
if (time_after(jiffies, ifsta->ibss_join_req +
2453
IEEE80211_IBSS_JOIN_TIMEOUT)) {
2454
if (ifsta->create_ibss &&
2455
local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2456
return ieee80211_sta_create_ibss(dev, ifsta);
2457
if (ifsta->create_ibss) {
2458
printk(KERN_DEBUG "%s: IBSS not allowed on the"
2459
" configured channel %d (%d MHz)\n",
2460
dev->name, local->hw.conf.channel,
2461
local->hw.conf.freq);
2464
/* No IBSS found - decrease scan interval and continue
2466
interval = IEEE80211_SCAN_INTERVAL_SLOW;
2469
ifsta->state = IEEE80211_IBSS_SEARCH;
2470
mod_timer(&ifsta->timer, jiffies + interval);
2478
int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2480
struct ieee80211_sub_if_data *sdata;
2481
struct ieee80211_if_sta *ifsta;
2482
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2484
if (len > IEEE80211_MAX_SSID_LEN)
2487
/* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2489
if (local->ops->conf_tx) {
2490
struct ieee80211_tx_queue_params qparam;
2493
memset(&qparam, 0, sizeof(qparam));
2494
/* TODO: are these ok defaults for all hw_modes? */
2497
local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2498
qparam.cw_max = 1023;
2499
qparam.burst_time = 0;
2500
for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2502
local->ops->conf_tx(local_to_hw(local),
2503
i + IEEE80211_TX_QUEUE_DATA0,
2506
/* IBSS uses different parameters for Beacon sending */
2510
local->ops->conf_tx(local_to_hw(local),
2511
IEEE80211_TX_QUEUE_BEACON, &qparam);
2514
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2515
ifsta = &sdata->u.sta;
2517
if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2518
ifsta->prev_bssid_set = 0;
2519
memcpy(ifsta->ssid, ssid, len);
2520
memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2521
ifsta->ssid_len = len;
2523
ifsta->ssid_set = len ? 1 : 0;
2524
if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2525
ifsta->ibss_join_req = jiffies;
2526
ifsta->state = IEEE80211_IBSS_SEARCH;
2527
return ieee80211_sta_find_ibss(dev, ifsta);
2533
int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2535
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2536
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2537
memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2538
*len = ifsta->ssid_len;
2543
int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2545
struct ieee80211_sub_if_data *sdata;
2546
struct ieee80211_if_sta *ifsta;
2549
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2550
ifsta = &sdata->u.sta;
2552
if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2553
memcpy(ifsta->bssid, bssid, ETH_ALEN);
2554
res = ieee80211_if_config(dev);
2556
printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2557
"the low-level driver\n", dev->name);
2562
if (!is_valid_ether_addr(bssid))
2563
ifsta->bssid_set = 0;
2565
ifsta->bssid_set = 1;
2570
static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2571
struct ieee80211_sub_if_data *sdata,
2574
struct sk_buff *skb;
2575
struct ieee80211_hdr *nullfunc;
2578
skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2580
printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2581
"frame\n", sdata->dev->name);
2584
skb_reserve(skb, local->hw.extra_tx_headroom);
2586
nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2587
memset(nullfunc, 0, 24);
2588
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2589
IEEE80211_FCTL_TODS;
2591
fc |= IEEE80211_FCTL_PM;
2592
nullfunc->frame_control = cpu_to_le16(fc);
2593
memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2594
memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2595
memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2597
ieee80211_sta_tx(sdata->dev, skb, 0);
2601
void iwlwifi_ieee80211_scan_completed(struct ieee80211_hw *hw)
2603
struct ieee80211_local *local = hw_to_local(hw);
2604
struct net_device *dev = local->scan_dev;
2605
struct ieee80211_sub_if_data *sdata;
2606
union iwreq_data wrqu;
2608
local->last_scan_completed = jiffies;
2610
local->sta_scanning = 0;
2612
if (ieee80211_hw_config(local))
2613
printk(KERN_DEBUG "%s: failed to restore operational"
2614
"channel after scan\n", dev->name);
2616
if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2617
ieee80211_if_config(dev))
2618
printk(KERN_DEBUG "%s: failed to restore operational"
2619
"BSSID after scan\n", dev->name);
2621
memset(&wrqu, 0, sizeof(wrqu));
2622
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2624
read_lock(&local->sub_if_lock);
2625
list_for_each_entry(sdata, &local->sub_if_list, list) {
2627
/* No need to wake the master device. */
2628
if (sdata->dev == local->mdev)
2631
if (sdata->type == IEEE80211_IF_TYPE_STA) {
2632
if (sdata->u.sta.associated)
2633
ieee80211_send_nullfunc(local, sdata, 0);
2634
ieee80211_sta_timer((unsigned long)sdata);
2637
netif_wake_queue(sdata->dev);
2639
read_unlock(&local->sub_if_lock);
2641
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2642
if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2643
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2644
if (!ifsta->bssid_set ||
2645
(!ifsta->state == IEEE80211_IBSS_JOINED &&
2646
!ieee80211_sta_active_ibss(dev)))
2647
ieee80211_sta_find_ibss(dev, ifsta);
2650
EXPORT_SYMBOL(iwlwifi_ieee80211_scan_completed);
2652
void ieee80211_sta_scan_work(struct work_struct *work)
2654
struct ieee80211_local *local =
2655
container_of(work, struct ieee80211_local, scan_work.work);
2656
struct net_device *dev = local->scan_dev;
2657
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2658
struct ieee80211_hw_mode *mode;
2659
struct ieee80211_channel *chan;
2661
unsigned long next_delay = 0;
2663
if (!local->sta_scanning)
2666
switch (local->scan_state) {
2667
case SCAN_SET_CHANNEL:
2668
mode = local->scan_hw_mode;
2669
if (local->scan_hw_mode->list.next == &local->modes_list &&
2670
local->scan_channel_idx >= mode->num_channels) {
2671
iwlwifi_ieee80211_scan_completed(local_to_hw(local));
2674
skip = !(local->enabled_modes & (1 << mode->mode));
2675
chan = &mode->channels[local->scan_channel_idx];
2676
if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2677
(sdata->type == IEEE80211_IF_TYPE_IBSS &&
2678
!(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2679
(local->hw_modes & local->enabled_modes &
2680
(1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2685
printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2686
dev->name, chan->chan, chan->freq);
2689
local->scan_channel = chan;
2690
if (ieee80211_hw_config(local)) {
2691
printk(KERN_DEBUG "%s: failed to set channel "
2692
"%d (%d MHz) for scan\n", dev->name,
2693
chan->chan, chan->freq);
2698
local->scan_channel_idx++;
2699
if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2700
if (local->scan_hw_mode->list.next != &local->modes_list) {
2701
local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2702
struct ieee80211_hw_mode,
2704
local->scan_channel_idx = 0;
2711
next_delay = IEEE80211_PROBE_DELAY +
2712
usecs_to_jiffies(local->hw.channel_change_time);
2713
local->scan_state = SCAN_SEND_PROBE;
2715
case SCAN_SEND_PROBE:
2716
if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2717
ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2718
local->scan_ssid_len);
2719
next_delay = IEEE80211_CHANNEL_TIME;
2721
next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2722
local->scan_state = SCAN_SET_CHANNEL;
2726
if (local->sta_scanning)
2727
queue_delayed_work(local->hw.workqueue, &local->scan_work,
2732
static int ieee80211_sta_start_scan(struct net_device *dev,
2733
u8 *ssid, size_t ssid_len)
2735
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2736
struct ieee80211_sub_if_data *sdata;
2738
if (ssid_len > IEEE80211_MAX_SSID_LEN)
2741
/* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2742
* BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2745
* ScanType: ACTIVE, PASSIVE
2746
* ProbeDelay: delay (in microseconds) to be used prior to transmitting
2747
* a Probe frame during active scanning
2749
* MinChannelTime (>= ProbeDelay), in TU
2750
* MaxChannelTime: (>= MinChannelTime), in TU
2753
/* MLME-SCAN.confirm
2755
* ResultCode: SUCCESS, INVALID_PARAMETERS
2758
if (local->sta_scanning) {
2759
if (local->scan_dev == dev)
2764
if (local->ops->hw_scan) {
2765
int rc = local->ops->hw_scan(local_to_hw(local),
2768
local->sta_scanning = 1;
2769
local->scan_dev = dev;
2774
local->sta_scanning = 1;
2776
read_lock(&local->sub_if_lock);
2777
list_for_each_entry(sdata, &local->sub_if_list, list) {
2779
/* Don't stop the master interface, otherwise we can't transmit
2781
if (sdata->dev == local->mdev)
2784
netif_stop_queue(sdata->dev);
2785
if (sdata->type == IEEE80211_IF_TYPE_STA &&
2786
sdata->u.sta.associated)
2787
ieee80211_send_nullfunc(local, sdata, 1);
2789
read_unlock(&local->sub_if_lock);
2792
local->scan_ssid_len = ssid_len;
2793
memcpy(local->scan_ssid, ssid, ssid_len);
2795
local->scan_ssid_len = 0;
2796
local->scan_state = SCAN_SET_CHANNEL;
2797
local->scan_hw_mode = list_entry(local->modes_list.next,
2798
struct ieee80211_hw_mode,
2800
local->scan_channel_idx = 0;
2801
local->scan_dev = dev;
2803
if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2804
ieee80211_if_config(dev))
2805
printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2808
/* TODO: start scan as soon as all nullfunc frames are ACKed */
2809
queue_delayed_work(local->hw.workqueue, &local->scan_work,
2810
IEEE80211_CHANNEL_TIME);
2816
int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2818
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2819
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2820
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2822
if (sdata->type != IEEE80211_IF_TYPE_STA)
2823
return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2825
if (local->sta_scanning) {
2826
if (local->scan_dev == dev)
2831
set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2832
queue_work(local->hw.workqueue, &ifsta->work);
2837
ieee80211_sta_scan_result(struct net_device *dev,
2838
struct ieee80211_sta_bss *bss,
2839
char *current_ev, char *end_buf)
2841
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2842
struct iw_event iwe;
2844
if (time_after(jiffies,
2845
bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2848
if (!(local->enabled_modes & (1 << bss->hw_mode)))
2851
if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2852
!bss->wpa_ie && !bss->rsn_ie)
2855
if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2856
(local->scan_ssid_len != bss->ssid_len ||
2857
memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2860
memset(&iwe, 0, sizeof(iwe));
2861
iwe.cmd = SIOCGIWAP;
2862
iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2863
memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2864
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2867
memset(&iwe, 0, sizeof(iwe));
2868
iwe.cmd = SIOCGIWESSID;
2869
iwe.u.data.length = bss->ssid_len;
2870
iwe.u.data.flags = 1;
2871
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2874
if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2875
memset(&iwe, 0, sizeof(iwe));
2876
iwe.cmd = SIOCGIWMODE;
2877
if (bss->capability & WLAN_CAPABILITY_ESS)
2878
iwe.u.mode = IW_MODE_MASTER;
2880
iwe.u.mode = IW_MODE_ADHOC;
2881
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2885
memset(&iwe, 0, sizeof(iwe));
2886
iwe.cmd = SIOCGIWFREQ;
2887
iwe.u.freq.m = bss->channel;
2889
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2891
iwe.u.freq.m = bss->freq * 100000;
2893
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2896
memset(&iwe, 0, sizeof(iwe));
2898
iwe.u.qual.qual = bss->signal;
2899
iwe.u.qual.level = bss->rssi;
2900
iwe.u.qual.noise = bss->noise;
2901
iwe.u.qual.updated = local->wstats_flags;
2902
current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2905
memset(&iwe, 0, sizeof(iwe));
2906
iwe.cmd = SIOCGIWENCODE;
2907
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2908
iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2910
iwe.u.data.flags = IW_ENCODE_DISABLED;
2911
iwe.u.data.length = 0;
2912
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2914
if (bss && bss->wpa_ie) {
2915
memset(&iwe, 0, sizeof(iwe));
2916
iwe.cmd = IWEVGENIE;
2917
iwe.u.data.length = bss->wpa_ie_len;
2918
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2922
if (bss && bss->rsn_ie) {
2923
memset(&iwe, 0, sizeof(iwe));
2924
iwe.cmd = IWEVGENIE;
2925
iwe.u.data.length = bss->rsn_ie_len;
2926
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2930
if (bss && bss->supp_rates_len > 0) {
2931
/* display all supported rates in readable format */
2932
char *p = current_ev + IW_EV_LCP_LEN;
2935
memset(&iwe, 0, sizeof(iwe));
2936
iwe.cmd = SIOCGIWRATE;
2937
/* Those two flags are ignored... */
2938
iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2940
for (i = 0; i < bss->supp_rates_len; i++) {
2941
iwe.u.bitrate.value = ((bss->supp_rates[i] &
2943
p = iwe_stream_add_value(current_ev, p,
2944
end_buf, &iwe, IW_EV_PARAM_LEN);
2951
buf = kmalloc(30, GFP_ATOMIC);
2953
memset(&iwe, 0, sizeof(iwe));
2954
iwe.cmd = IWEVCUSTOM;
2955
sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2956
iwe.u.data.length = strlen(buf);
2957
current_ev = iwe_stream_add_point(current_ev, end_buf,
2966
if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2969
buf = kmalloc(100, GFP_ATOMIC);
2973
memset(&iwe, 0, sizeof(iwe));
2974
iwe.cmd = IWEVCUSTOM;
2975
sprintf(buf, "bcn_int=%d", bss->beacon_int);
2976
iwe.u.data.length = strlen(buf);
2977
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2980
memset(&iwe, 0, sizeof(iwe));
2981
iwe.cmd = IWEVCUSTOM;
2982
sprintf(buf, "capab=0x%04x", bss->capability);
2983
iwe.u.data.length = strlen(buf);
2984
current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2995
int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
2997
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2998
char *current_ev = buf;
2999
char *end_buf = buf + len;
3000
struct ieee80211_sta_bss *bss;
3002
spin_lock_bh(&local->sta_bss_lock);
3003
list_for_each_entry(bss, &local->sta_bss_list, list) {
3004
if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3005
spin_unlock_bh(&local->sta_bss_lock);
3008
current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3011
spin_unlock_bh(&local->sta_bss_lock);
3012
return current_ev - buf;
3016
int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3018
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3019
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3020
kfree(ifsta->extra_ie);
3022
ifsta->extra_ie = NULL;
3023
ifsta->extra_ie_len = 0;
3026
ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3027
if (!ifsta->extra_ie) {
3028
ifsta->extra_ie_len = 0;
3031
memcpy(ifsta->extra_ie, ie, len);
3032
ifsta->extra_ie_len = len;
3037
struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3038
struct sk_buff *skb, u8 *bssid,
3041
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3042
struct sta_info *sta;
3043
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3045
/* TODO: Could consider removing the least recently used entry and
3046
* allow new one to be added. */
3047
if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3048
if (net_ratelimit()) {
3049
printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3050
"entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3055
printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3056
local->mdev->name, MAC_ARG(addr), dev->name);
3058
sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3062
sta->supp_rates = sdata->u.sta.supp_rates_bits;
3064
rate_control_rate_init(sta, local);
3066
return sta; /* caller will call iwlwifi_sta_info_put() */
3070
int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3072
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3073
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3075
printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3078
if (sdata->type != IEEE80211_IF_TYPE_STA &&
3079
sdata->type != IEEE80211_IF_TYPE_IBSS)
3082
ieee80211_send_deauth(dev, ifsta, reason);
3083
ieee80211_set_disassoc(dev, ifsta, 1);
3088
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3090
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3091
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3093
printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3096
if (sdata->type != IEEE80211_IF_TYPE_STA)
3099
if (!ifsta->associated)
3102
ieee80211_send_disassoc(dev, ifsta, reason);
3103
ieee80211_set_disassoc(dev, ifsta, 0);
added
removed
updates/wireless/iwlwifi/mac80211/origin/net/mac80211/ieee80211_sta.c
