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 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <net/iw_handler.h>
28 #include <asm/types.h>
30 #include <net/mac80211.h>
31 #include "ieee80211_i.h"
32 #include "ieee80211_rate.h"
33 #include "ieee80211_led.h"
35 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36 #define IEEE80211_AUTH_MAX_TRIES 3
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_MAX_TRIES 3
39 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
40 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
41 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
42 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
43 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
44 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
46 #define IEEE80211_PROBE_DELAY (HZ / 33)
47 #define IEEE80211_CHANNEL_TIME (HZ / 33)
48 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
49 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
50 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
51 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
53 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
56 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
58 #define ERP_INFO_USE_PROTECTION BIT(1)
60 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
61 u8 *ssid, size_t ssid_len);
62 static struct ieee80211_sta_bss *
63 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
64 u8 *ssid, u8 ssid_len);
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 {
95 /* length of them, respectively */
107 u8 ext_supp_rates_len;
114 static void ieee802_11_parse_elems(u8 *start, size_t len,
115 struct ieee802_11_elems *elems)
120 memset(elems, 0, sizeof(*elems));
135 elems->ssid_len = elen;
137 case WLAN_EID_SUPP_RATES:
138 elems->supp_rates = pos;
139 elems->supp_rates_len = elen;
141 case WLAN_EID_FH_PARAMS:
142 elems->fh_params = pos;
143 elems->fh_params_len = elen;
145 case WLAN_EID_DS_PARAMS:
146 elems->ds_params = pos;
147 elems->ds_params_len = elen;
149 case WLAN_EID_CF_PARAMS:
150 elems->cf_params = pos;
151 elems->cf_params_len = elen;
155 elems->tim_len = elen;
157 case WLAN_EID_IBSS_PARAMS:
158 elems->ibss_params = pos;
159 elems->ibss_params_len = elen;
161 case WLAN_EID_CHALLENGE:
162 elems->challenge = pos;
163 elems->challenge_len = elen;
166 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
168 /* Microsoft OUI (00:50:F2) */
170 /* OUI Type 1 - WPA IE */
172 elems->wpa_len = elen;
173 } else if (elen >= 5 && pos[3] == 2) {
175 elems->wmm_info = pos;
176 elems->wmm_info_len = elen;
177 } else if (pos[4] == 1) {
178 elems->wmm_param = pos;
179 elems->wmm_param_len = elen;
186 elems->rsn_len = elen;
188 case WLAN_EID_ERP_INFO:
189 elems->erp_info = pos;
190 elems->erp_info_len = elen;
192 case WLAN_EID_EXT_SUPP_RATES:
193 elems->ext_supp_rates = pos;
194 elems->ext_supp_rates_len = elen;
196 case WLAN_EID_HT_CAPABILITY:
197 elems->ht_cap_elem = pos;
198 elems->ht_cap_elem_len = elen;
200 case WLAN_EID_HT_EXTRA_INFO:
201 elems->ht_info_elem = pos;
202 elems->ht_info_elem_len = elen;
214 static int ecw2cw(int ecw)
224 static void ieee80211_sta_wmm_params(struct net_device *dev,
225 struct ieee80211_if_sta *ifsta,
226 u8 *wmm_param, size_t wmm_param_len)
228 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
229 struct ieee80211_tx_queue_params params;
234 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
236 count = wmm_param[6] & 0x0f;
237 if (count == ifsta->wmm_last_param_set)
239 ifsta->wmm_last_param_set = count;
242 left = wmm_param_len - 8;
244 memset(¶ms, 0, sizeof(params));
246 if (!local->ops->conf_tx)
250 for (; left >= 4; left -= 4, pos += 4) {
251 int aci = (pos[0] >> 5) & 0x03;
252 int acm = (pos[0] >> 4) & 0x01;
257 queue = IEEE80211_TX_QUEUE_DATA3;
259 local->wmm_acm |= BIT(0) | BIT(3);
263 queue = IEEE80211_TX_QUEUE_DATA1;
265 local->wmm_acm |= BIT(4) | BIT(5);
269 queue = IEEE80211_TX_QUEUE_DATA0;
271 local->wmm_acm |= BIT(6) | BIT(7);
276 queue = IEEE80211_TX_QUEUE_DATA2;
278 local->wmm_acm |= BIT(1) | BIT(2);
283 params.aifs = pos[0] & 0x0f;
284 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
285 params.cw_min = ecw2cw(pos[1] & 0x0f);
286 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
287 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
288 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
289 "cWmin=%d cWmax=%d burst=%d\n",
290 dev->name, queue, aci, acm, params.aifs, params.cw_min,
291 params.cw_max, params.burst_time);
292 /* TODO: handle ACM (block TX, fallback to next lowest allowed
294 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
295 printk(KERN_DEBUG "%s: failed to set TX queue "
296 "parameters for queue %d\n", dev->name, queue);
302 static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
304 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
305 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
306 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
307 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
309 DECLARE_MAC_BUF(mac);
311 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
312 if (net_ratelimit()) {
313 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
316 use_protection ? "enabled" : "disabled",
317 print_mac(mac, ifsta->bssid));
320 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
322 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
323 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
326 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
327 if (net_ratelimit()) {
328 printk(KERN_DEBUG "%s: switched to %s barker preamble"
331 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
333 print_mac(mac, ifsta->bssid));
336 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
338 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
339 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
343 ieee80211_erp_info_change_notify(dev, changes);
346 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
347 struct ieee80211_ht_info *ht_info)
353 memset(ht_info, 0, sizeof(*ht_info));
356 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
358 ht_info->ht_supported = 1;
359 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
360 ht_info->ampdu_factor =
361 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
362 ht_info->ampdu_density =
363 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
364 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
366 ht_info->ht_supported = 0;
371 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
372 struct ieee80211_ht_addt_info *ht_add_info_ie,
373 struct ieee80211_ht_bss_info *bss_info)
375 if (bss_info == NULL)
378 memset(bss_info, 0, sizeof(*bss_info));
380 if (ht_add_info_ie) {
382 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
384 bss_info->primary_channel = ht_add_info_ie->control_chan;
385 bss_info->bss_cap = ht_add_info_ie->ht_param;
386 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
392 static void ieee80211_sta_send_associnfo(struct net_device *dev,
393 struct ieee80211_if_sta *ifsta)
398 union iwreq_data wrqu;
400 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
403 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
404 ifsta->assocresp_ies_len), GFP_KERNEL);
408 len = sprintf(buf, "ASSOCINFO(");
409 if (ifsta->assocreq_ies) {
410 len += sprintf(buf + len, "ReqIEs=");
411 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
412 len += sprintf(buf + len, "%02x",
413 ifsta->assocreq_ies[i]);
416 if (ifsta->assocresp_ies) {
417 if (ifsta->assocreq_ies)
418 len += sprintf(buf + len, " ");
419 len += sprintf(buf + len, "RespIEs=");
420 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
421 len += sprintf(buf + len, "%02x",
422 ifsta->assocresp_ies[i]);
425 len += sprintf(buf + len, ")");
427 if (len > IW_CUSTOM_MAX) {
428 len = sprintf(buf, "ASSOCRESPIE=");
429 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
430 len += sprintf(buf + len, "%02x",
431 ifsta->assocresp_ies[i]);
435 memset(&wrqu, 0, sizeof(wrqu));
436 wrqu.data.length = len;
437 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
443 static void ieee80211_set_associated(struct net_device *dev,
444 struct ieee80211_if_sta *ifsta,
447 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
448 union iwreq_data wrqu;
450 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
454 struct ieee80211_sub_if_data *sdata;
455 struct ieee80211_sta_bss *bss;
457 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
459 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
460 if (sdata->type != IEEE80211_IF_TYPE_STA)
463 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
464 local->hw.conf.channel,
465 ifsta->ssid, ifsta->ssid_len);
467 if (bss->has_erp_value)
468 ieee80211_handle_erp_ie(dev, bss->erp_value);
469 ieee80211_rx_bss_put(dev, bss);
472 netif_carrier_on(dev);
473 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
474 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
475 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
476 ieee80211_sta_send_associnfo(dev, ifsta);
478 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
480 netif_carrier_off(dev);
481 ieee80211_reset_erp_info(dev);
482 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
484 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
485 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
486 ifsta->last_probe = jiffies;
487 ieee80211_led_assoc(local, assoc);
490 static void ieee80211_set_disassoc(struct net_device *dev,
491 struct ieee80211_if_sta *ifsta, int deauth)
494 ifsta->auth_tries = 0;
495 ifsta->assoc_tries = 0;
496 ieee80211_set_associated(dev, ifsta, 0);
499 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
502 struct ieee80211_sub_if_data *sdata;
503 struct ieee80211_tx_packet_data *pkt_data;
505 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
506 skb->dev = sdata->local->mdev;
507 skb_set_mac_header(skb, 0);
508 skb_set_network_header(skb, 0);
509 skb_set_transport_header(skb, 0);
511 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
512 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
513 pkt_data->ifindex = sdata->dev->ifindex;
515 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
521 static void ieee80211_send_auth(struct net_device *dev,
522 struct ieee80211_if_sta *ifsta,
523 int transaction, u8 *extra, size_t extra_len,
526 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
528 struct ieee80211_mgmt *mgmt;
530 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
531 sizeof(*mgmt) + 6 + extra_len);
533 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
534 "frame\n", dev->name);
537 skb_reserve(skb, local->hw.extra_tx_headroom);
539 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
540 memset(mgmt, 0, 24 + 6);
541 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
542 IEEE80211_STYPE_AUTH);
544 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
545 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
546 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
547 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
548 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
549 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
550 ifsta->auth_transaction = transaction + 1;
551 mgmt->u.auth.status_code = cpu_to_le16(0);
553 memcpy(skb_put(skb, extra_len), extra, extra_len);
555 ieee80211_sta_tx(dev, skb, encrypt);
559 static void ieee80211_authenticate(struct net_device *dev,
560 struct ieee80211_if_sta *ifsta)
562 DECLARE_MAC_BUF(mac);
565 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
566 printk(KERN_DEBUG "%s: authentication with AP %s"
568 dev->name, print_mac(mac, ifsta->bssid));
569 ifsta->state = IEEE80211_DISABLED;
573 ifsta->state = IEEE80211_AUTHENTICATE;
574 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
575 dev->name, print_mac(mac, ifsta->bssid));
577 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
579 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
583 static void ieee80211_send_assoc(struct net_device *dev,
584 struct ieee80211_if_sta *ifsta)
586 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
587 struct ieee80211_hw_mode *mode;
589 struct ieee80211_mgmt *mgmt;
593 struct ieee80211_sta_bss *bss;
596 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
597 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
600 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
601 "frame\n", dev->name);
604 skb_reserve(skb, local->hw.extra_tx_headroom);
606 mode = local->oper_hw_mode;
607 capab = ifsta->capab;
608 if (mode->mode == MODE_IEEE80211G) {
609 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
610 WLAN_CAPABILITY_SHORT_PREAMBLE;
612 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
613 ifsta->ssid, ifsta->ssid_len);
615 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
616 capab |= WLAN_CAPABILITY_PRIVACY;
620 ieee80211_rx_bss_put(dev, bss);
623 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
625 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
626 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
627 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
629 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
631 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
632 IEEE80211_STYPE_REASSOC_REQ);
633 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
634 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
635 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
639 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
640 IEEE80211_STYPE_ASSOC_REQ);
641 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
642 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
646 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
647 *pos++ = WLAN_EID_SSID;
648 *pos++ = ifsta->ssid_len;
649 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
651 len = mode->num_rates;
654 pos = skb_put(skb, len + 2);
655 *pos++ = WLAN_EID_SUPP_RATES;
657 for (i = 0; i < len; i++) {
658 int rate = mode->rates[i].rate;
659 *pos++ = (u8) (rate / 5);
662 if (mode->num_rates > len) {
663 pos = skb_put(skb, mode->num_rates - len + 2);
664 *pos++ = WLAN_EID_EXT_SUPP_RATES;
665 *pos++ = mode->num_rates - len;
666 for (i = len; i < mode->num_rates; i++) {
667 int rate = mode->rates[i].rate;
668 *pos++ = (u8) (rate / 5);
672 if (ifsta->extra_ie) {
673 pos = skb_put(skb, ifsta->extra_ie_len);
674 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
677 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
678 pos = skb_put(skb, 9);
679 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
680 *pos++ = 7; /* len */
681 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
684 *pos++ = 2; /* WME */
685 *pos++ = 0; /* WME info */
686 *pos++ = 1; /* WME ver */
689 /* wmm support is a must to HT */
690 if (wmm && mode->ht_info.ht_supported) {
691 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
692 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
693 *pos++ = WLAN_EID_HT_CAPABILITY;
694 *pos++ = sizeof(struct ieee80211_ht_cap);
695 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
696 memcpy(pos, &tmp, sizeof(u16));
698 *pos++ = (mode->ht_info.ampdu_factor |
699 (mode->ht_info.ampdu_density << 2));
700 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
703 kfree(ifsta->assocreq_ies);
704 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
705 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
706 if (ifsta->assocreq_ies)
707 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
709 ieee80211_sta_tx(dev, skb, 0);
713 static void ieee80211_send_deauth(struct net_device *dev,
714 struct ieee80211_if_sta *ifsta, u16 reason)
716 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
718 struct ieee80211_mgmt *mgmt;
720 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
722 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
723 "frame\n", dev->name);
726 skb_reserve(skb, local->hw.extra_tx_headroom);
728 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
730 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
731 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
732 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
733 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
734 IEEE80211_STYPE_DEAUTH);
736 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
738 ieee80211_sta_tx(dev, skb, 0);
742 static void ieee80211_send_disassoc(struct net_device *dev,
743 struct ieee80211_if_sta *ifsta, u16 reason)
745 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
747 struct ieee80211_mgmt *mgmt;
749 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
751 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
752 "frame\n", dev->name);
755 skb_reserve(skb, local->hw.extra_tx_headroom);
757 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
759 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
760 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
761 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
762 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
763 IEEE80211_STYPE_DISASSOC);
765 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
767 ieee80211_sta_tx(dev, skb, 0);
771 static int ieee80211_privacy_mismatch(struct net_device *dev,
772 struct ieee80211_if_sta *ifsta)
774 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
775 struct ieee80211_sta_bss *bss;
780 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
783 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
784 ifsta->ssid, ifsta->ssid_len);
788 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
789 wep_privacy = !!ieee80211_sta_wep_configured(dev);
790 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
792 ieee80211_rx_bss_put(dev, bss);
794 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
801 static void ieee80211_associate(struct net_device *dev,
802 struct ieee80211_if_sta *ifsta)
804 DECLARE_MAC_BUF(mac);
806 ifsta->assoc_tries++;
807 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
808 printk(KERN_DEBUG "%s: association with AP %s"
810 dev->name, print_mac(mac, ifsta->bssid));
811 ifsta->state = IEEE80211_DISABLED;
815 ifsta->state = IEEE80211_ASSOCIATE;
816 printk(KERN_DEBUG "%s: associate with AP %s\n",
817 dev->name, print_mac(mac, ifsta->bssid));
818 if (ieee80211_privacy_mismatch(dev, ifsta)) {
819 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
820 "mixed-cell disabled - abort association\n", dev->name);
821 ifsta->state = IEEE80211_DISABLED;
825 ieee80211_send_assoc(dev, ifsta);
827 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
831 static void ieee80211_associated(struct net_device *dev,
832 struct ieee80211_if_sta *ifsta)
834 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
835 struct sta_info *sta;
837 DECLARE_MAC_BUF(mac);
839 /* TODO: start monitoring current AP signal quality and number of
840 * missed beacons. Scan other channels every now and then and search
842 /* TODO: remove expired BSSes */
844 ifsta->state = IEEE80211_ASSOCIATED;
846 sta = sta_info_get(local, ifsta->bssid);
848 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
849 dev->name, print_mac(mac, ifsta->bssid));
853 if (time_after(jiffies,
854 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
855 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
856 printk(KERN_DEBUG "%s: No ProbeResp from "
857 "current AP %s - assume out of "
859 dev->name, print_mac(mac, ifsta->bssid));
863 ieee80211_send_probe_req(dev, ifsta->bssid,
865 local->scan_ssid_len);
866 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
868 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
869 if (time_after(jiffies, ifsta->last_probe +
870 IEEE80211_PROBE_INTERVAL)) {
871 ifsta->last_probe = jiffies;
872 ieee80211_send_probe_req(dev, ifsta->bssid,
880 ifsta->state = IEEE80211_DISABLED;
881 ieee80211_set_associated(dev, ifsta, 0);
883 mod_timer(&ifsta->timer, jiffies +
884 IEEE80211_MONITORING_INTERVAL);
889 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
890 u8 *ssid, size_t ssid_len)
892 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
893 struct ieee80211_hw_mode *mode;
895 struct ieee80211_mgmt *mgmt;
896 u8 *pos, *supp_rates, *esupp_rates = NULL;
899 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
901 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
902 "request\n", dev->name);
905 skb_reserve(skb, local->hw.extra_tx_headroom);
907 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
909 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
910 IEEE80211_STYPE_PROBE_REQ);
911 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
913 memcpy(mgmt->da, dst, ETH_ALEN);
914 memcpy(mgmt->bssid, dst, ETH_ALEN);
916 memset(mgmt->da, 0xff, ETH_ALEN);
917 memset(mgmt->bssid, 0xff, ETH_ALEN);
919 pos = skb_put(skb, 2 + ssid_len);
920 *pos++ = WLAN_EID_SSID;
922 memcpy(pos, ssid, ssid_len);
924 supp_rates = skb_put(skb, 2);
925 supp_rates[0] = WLAN_EID_SUPP_RATES;
927 mode = local->oper_hw_mode;
928 for (i = 0; i < mode->num_rates; i++) {
929 struct ieee80211_rate *rate = &mode->rates[i];
930 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
933 pos = skb_put(skb, 1);
935 } else if (supp_rates[1] == 8) {
936 esupp_rates = skb_put(skb, 3);
937 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
939 pos = &esupp_rates[2];
941 pos = skb_put(skb, 1);
944 *pos = rate->rate / 5;
947 ieee80211_sta_tx(dev, skb, 0);
951 static int ieee80211_sta_wep_configured(struct net_device *dev)
953 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
954 if (!sdata || !sdata->default_key ||
955 sdata->default_key->conf.alg != ALG_WEP)
961 static void ieee80211_auth_completed(struct net_device *dev,
962 struct ieee80211_if_sta *ifsta)
964 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
965 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
966 ieee80211_associate(dev, ifsta);
970 static void ieee80211_auth_challenge(struct net_device *dev,
971 struct ieee80211_if_sta *ifsta,
972 struct ieee80211_mgmt *mgmt,
976 struct ieee802_11_elems elems;
978 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
979 pos = mgmt->u.auth.variable;
980 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
981 if (!elems.challenge) {
982 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
983 "frame\n", dev->name);
986 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
987 elems.challenge_len + 2, 1);
991 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
992 struct ieee80211_if_sta *ifsta,
993 struct ieee80211_mgmt *mgmt,
996 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
997 u16 auth_alg, auth_transaction, status_code;
998 DECLARE_MAC_BUF(mac);
1000 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1001 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1002 printk(KERN_DEBUG "%s: authentication frame received from "
1003 "%s, but not in authenticate state - ignored\n",
1004 dev->name, print_mac(mac, mgmt->sa));
1009 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1010 "received from %s - ignored\n",
1011 dev->name, len, print_mac(mac, mgmt->sa));
1015 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1016 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1017 printk(KERN_DEBUG "%s: authentication frame received from "
1018 "unknown AP (SA=%s BSSID=%s) - "
1019 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1020 print_mac(mac, mgmt->bssid));
1024 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1025 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1026 printk(KERN_DEBUG "%s: authentication frame received from "
1027 "unknown BSSID (SA=%s BSSID=%s) - "
1028 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1029 print_mac(mac, mgmt->bssid));
1033 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1034 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1035 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1037 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1038 "transaction=%d status=%d)\n",
1039 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1040 auth_transaction, status_code);
1042 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1043 /* IEEE 802.11 standard does not require authentication in IBSS
1044 * networks and most implementations do not seem to use it.
1045 * However, try to reply to authentication attempts if someone
1046 * has actually implemented this.
1047 * TODO: Could implement shared key authentication. */
1048 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1049 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1050 "frame (alg=%d transaction=%d)\n",
1051 dev->name, auth_alg, auth_transaction);
1054 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1057 if (auth_alg != ifsta->auth_alg ||
1058 auth_transaction != ifsta->auth_transaction) {
1059 printk(KERN_DEBUG "%s: unexpected authentication frame "
1060 "(alg=%d transaction=%d)\n",
1061 dev->name, auth_alg, auth_transaction);
1065 if (status_code != WLAN_STATUS_SUCCESS) {
1066 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1067 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1068 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1070 const int num_algs = ARRAY_SIZE(algs);
1072 algs[0] = algs[1] = algs[2] = 0xff;
1073 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1074 algs[0] = WLAN_AUTH_OPEN;
1075 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1076 algs[1] = WLAN_AUTH_SHARED_KEY;
1077 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1078 algs[2] = WLAN_AUTH_LEAP;
1079 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1081 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1085 for (i = 0; i < num_algs; i++) {
1087 if (pos >= num_algs)
1089 if (algs[pos] == ifsta->auth_alg ||
1092 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1093 !ieee80211_sta_wep_configured(dev))
1095 ifsta->auth_alg = algs[pos];
1096 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1098 dev->name, ifsta->auth_alg);
1105 switch (ifsta->auth_alg) {
1106 case WLAN_AUTH_OPEN:
1107 case WLAN_AUTH_LEAP:
1108 ieee80211_auth_completed(dev, ifsta);
1110 case WLAN_AUTH_SHARED_KEY:
1111 if (ifsta->auth_transaction == 4)
1112 ieee80211_auth_completed(dev, ifsta);
1114 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1120 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1121 struct ieee80211_if_sta *ifsta,
1122 struct ieee80211_mgmt *mgmt,
1126 DECLARE_MAC_BUF(mac);
1129 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1130 "received from %s - ignored\n",
1131 dev->name, len, print_mac(mac, mgmt->sa));
1135 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1136 printk(KERN_DEBUG "%s: deauthentication frame received from "
1137 "unknown AP (SA=%s BSSID=%s) - "
1138 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1139 print_mac(mac, mgmt->bssid));
1143 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1145 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1147 dev->name, print_mac(mac, mgmt->sa), reason_code);
1149 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1150 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1153 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1154 ifsta->state == IEEE80211_ASSOCIATE ||
1155 ifsta->state == IEEE80211_ASSOCIATED) {
1156 ifsta->state = IEEE80211_AUTHENTICATE;
1157 mod_timer(&ifsta->timer, jiffies +
1158 IEEE80211_RETRY_AUTH_INTERVAL);
1161 ieee80211_set_disassoc(dev, ifsta, 1);
1162 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1166 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1167 struct ieee80211_if_sta *ifsta,
1168 struct ieee80211_mgmt *mgmt,
1172 DECLARE_MAC_BUF(mac);
1175 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1176 "received from %s - ignored\n",
1177 dev->name, len, print_mac(mac, mgmt->sa));
1181 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1182 printk(KERN_DEBUG "%s: disassociation frame received from "
1183 "unknown AP (SA=%s BSSID=%s) - "
1184 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1185 print_mac(mac, mgmt->bssid));
1189 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1191 printk(KERN_DEBUG "%s: RX disassociation from %s"
1193 dev->name, print_mac(mac, mgmt->sa), reason_code);
1195 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1196 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1198 if (ifsta->state == IEEE80211_ASSOCIATED) {
1199 ifsta->state = IEEE80211_ASSOCIATE;
1200 mod_timer(&ifsta->timer, jiffies +
1201 IEEE80211_RETRY_AUTH_INTERVAL);
1204 ieee80211_set_disassoc(dev, ifsta, 0);
1208 static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1209 struct ieee80211_if_sta *ifsta,
1210 struct ieee80211_mgmt *mgmt,
1214 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1215 struct ieee80211_hw_mode *mode;
1216 struct sta_info *sta;
1218 u16 capab_info, status_code, aid;
1219 struct ieee802_11_elems elems;
1222 DECLARE_MAC_BUF(mac);
1224 /* AssocResp and ReassocResp have identical structure, so process both
1225 * of them in this function. */
1227 if (ifsta->state != IEEE80211_ASSOCIATE) {
1228 printk(KERN_DEBUG "%s: association frame received from "
1229 "%s, but not in associate state - ignored\n",
1230 dev->name, print_mac(mac, mgmt->sa));
1235 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1236 "received from %s - ignored\n",
1237 dev->name, len, print_mac(mac, mgmt->sa));
1241 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1242 printk(KERN_DEBUG "%s: association frame received from "
1243 "unknown AP (SA=%s BSSID=%s) - "
1244 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1245 print_mac(mac, mgmt->bssid));
1249 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1250 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1251 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1253 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1254 "status=%d aid=%d)\n",
1255 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1256 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1258 if (status_code != WLAN_STATUS_SUCCESS) {
1259 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1260 dev->name, status_code);
1261 /* if this was a reassociation, ensure we try a "full"
1262 * association next time. This works around some broken APs
1263 * which do not correctly reject reassociation requests. */
1264 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1268 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1269 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1270 "set\n", dev->name, aid);
1271 aid &= ~(BIT(15) | BIT(14));
1273 pos = mgmt->u.assoc_resp.variable;
1274 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1276 if (!elems.supp_rates) {
1277 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1282 /* it probably doesn't, but if the frame includes an ERP value then
1283 * update our stored copy */
1284 if (elems.erp_info && elems.erp_info_len >= 1) {
1285 struct ieee80211_sta_bss *bss
1286 = ieee80211_rx_bss_get(dev, ifsta->bssid,
1287 local->hw.conf.channel,
1288 ifsta->ssid, ifsta->ssid_len);
1290 bss->erp_value = elems.erp_info[0];
1291 bss->has_erp_value = 1;
1292 ieee80211_rx_bss_put(dev, bss);
1296 printk(KERN_DEBUG "%s: associated\n", dev->name);
1298 ifsta->ap_capab = capab_info;
1300 kfree(ifsta->assocresp_ies);
1301 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1302 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1303 if (ifsta->assocresp_ies)
1304 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1306 ieee80211_set_associated(dev, ifsta, 1);
1308 /* Add STA entry for the AP */
1309 sta = sta_info_get(local, ifsta->bssid);
1311 struct ieee80211_sta_bss *bss;
1312 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1314 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1315 " AP\n", dev->name);
1318 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1319 local->hw.conf.channel,
1320 ifsta->ssid, ifsta->ssid_len);
1322 sta->last_rssi = bss->rssi;
1323 sta->last_signal = bss->signal;
1324 sta->last_noise = bss->noise;
1325 ieee80211_rx_bss_put(dev, bss);
1330 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1333 mode = local->oper_hw_mode;
1334 for (i = 0; i < elems.supp_rates_len; i++) {
1335 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1336 for (j = 0; j < mode->num_rates; j++)
1337 if (mode->rates[j].rate == rate)
1340 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1341 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1342 for (j = 0; j < mode->num_rates; j++)
1343 if (mode->rates[j].rate == rate)
1346 sta->supp_rates = rates;
1348 rate_control_rate_init(sta, local);
1350 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1351 sta->flags |= WLAN_STA_WME;
1352 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1353 elems.wmm_param_len);
1359 ieee80211_associated(dev, ifsta);
1363 /* Caller must hold local->sta_bss_lock */
1364 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1365 struct ieee80211_sta_bss *bss)
1367 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1368 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1369 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1373 /* Caller must hold local->sta_bss_lock */
1374 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1375 struct ieee80211_sta_bss *bss)
1377 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1378 struct ieee80211_sta_bss *b, *prev = NULL;
1379 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1383 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1386 prev->hnext = bss->hnext;
1395 static struct ieee80211_sta_bss *
1396 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1397 u8 *ssid, u8 ssid_len)
1399 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1400 struct ieee80211_sta_bss *bss;
1402 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1405 atomic_inc(&bss->users);
1406 atomic_inc(&bss->users);
1407 memcpy(bss->bssid, bssid, ETH_ALEN);
1408 bss->channel = channel;
1409 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1410 memcpy(bss->ssid, ssid, ssid_len);
1411 bss->ssid_len = ssid_len;
1414 spin_lock_bh(&local->sta_bss_lock);
1415 /* TODO: order by RSSI? */
1416 list_add_tail(&bss->list, &local->sta_bss_list);
1417 __ieee80211_rx_bss_hash_add(dev, bss);
1418 spin_unlock_bh(&local->sta_bss_lock);
1423 static struct ieee80211_sta_bss *
1424 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1425 u8 *ssid, u8 ssid_len)
1427 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1428 struct ieee80211_sta_bss *bss;
1430 spin_lock_bh(&local->sta_bss_lock);
1431 bss = local->sta_bss_hash[STA_HASH(bssid)];
1433 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1434 bss->channel == channel &&
1435 bss->ssid_len == ssid_len &&
1436 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1437 atomic_inc(&bss->users);
1442 spin_unlock_bh(&local->sta_bss_lock);
1447 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1457 static void ieee80211_rx_bss_put(struct net_device *dev,
1458 struct ieee80211_sta_bss *bss)
1460 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1461 if (!atomic_dec_and_test(&bss->users))
1464 spin_lock_bh(&local->sta_bss_lock);
1465 __ieee80211_rx_bss_hash_del(dev, bss);
1466 list_del(&bss->list);
1467 spin_unlock_bh(&local->sta_bss_lock);
1468 ieee80211_rx_bss_free(bss);
1472 void ieee80211_rx_bss_list_init(struct net_device *dev)
1474 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1475 spin_lock_init(&local->sta_bss_lock);
1476 INIT_LIST_HEAD(&local->sta_bss_list);
1480 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1482 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1483 struct ieee80211_sta_bss *bss, *tmp;
1485 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1486 ieee80211_rx_bss_put(dev, bss);
1490 static void ieee80211_rx_bss_info(struct net_device *dev,
1491 struct ieee80211_mgmt *mgmt,
1493 struct ieee80211_rx_status *rx_status,
1496 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1497 struct ieee802_11_elems elems;
1500 struct ieee80211_sta_bss *bss;
1501 struct sta_info *sta;
1502 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1504 DECLARE_MAC_BUF(mac);
1505 DECLARE_MAC_BUF(mac2);
1507 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1508 return; /* ignore ProbeResp to foreign address */
1511 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
1512 dev->name, beacon ? "Beacon" : "Probe Response",
1513 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
1516 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1520 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1522 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1523 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1524 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1525 static unsigned long last_tsf_debug = 0;
1527 if (local->ops->get_tsf)
1528 tsf = local->ops->get_tsf(local_to_hw(local));
1531 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1532 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1533 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
1535 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
1536 (unsigned long long)tsf,
1537 (unsigned long long)timestamp,
1538 (unsigned long long)(tsf - timestamp),
1540 last_tsf_debug = jiffies;
1542 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1545 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1547 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1548 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1549 (sta = sta_info_get(local, mgmt->sa))) {
1550 struct ieee80211_hw_mode *mode;
1551 struct ieee80211_rate *rates;
1553 u32 supp_rates, prev_rates;
1556 mode = local->sta_sw_scanning ?
1557 local->scan_hw_mode : local->oper_hw_mode;
1559 if (local->sta_hw_scanning) {
1560 /* search for the correct mode matches the beacon */
1561 list_for_each_entry(mode, &local->modes_list, list)
1562 if (mode->mode == rx_status->phymode)
1566 mode = local->oper_hw_mode;
1568 rates = mode->rates;
1569 num_rates = mode->num_rates;
1572 for (i = 0; i < elems.supp_rates_len +
1573 elems.ext_supp_rates_len; i++) {
1576 if (i < elems.supp_rates_len)
1577 rate = elems.supp_rates[i];
1578 else if (elems.ext_supp_rates)
1579 rate = elems.ext_supp_rates
1580 [i - elems.supp_rates_len];
1581 own_rate = 5 * (rate & 0x7f);
1582 for (j = 0; j < num_rates; j++)
1583 if (rates[j].rate == own_rate)
1584 supp_rates |= BIT(j);
1587 prev_rates = sta->supp_rates;
1588 sta->supp_rates &= supp_rates;
1589 if (sta->supp_rates == 0) {
1590 /* No matching rates - this should not really happen.
1591 * Make sure that at least one rate is marked
1592 * supported to avoid issues with TX rate ctrl. */
1593 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1595 if (sta->supp_rates != prev_rates) {
1596 printk(KERN_DEBUG "%s: updated supp_rates set for "
1597 "%s based on beacon info (0x%x & 0x%x -> "
1599 dev->name, print_mac(mac, sta->addr), prev_rates,
1600 supp_rates, sta->supp_rates);
1608 if (elems.ds_params && elems.ds_params_len == 1)
1609 channel = elems.ds_params[0];
1611 channel = rx_status->channel;
1613 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1614 elems.ssid, elems.ssid_len);
1616 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1617 elems.ssid, elems.ssid_len);
1622 /* TODO: order by RSSI? */
1623 spin_lock_bh(&local->sta_bss_lock);
1624 list_move_tail(&bss->list, &local->sta_bss_list);
1625 spin_unlock_bh(&local->sta_bss_lock);
1629 if (bss->probe_resp && beacon) {
1630 /* Do not allow beacon to override data from Probe Response. */
1631 ieee80211_rx_bss_put(dev, bss);
1635 /* save the ERP value so that it is available at association time */
1636 if (elems.erp_info && elems.erp_info_len >= 1) {
1637 bss->erp_value = elems.erp_info[0];
1638 bss->has_erp_value = 1;
1641 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1642 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1644 bss->supp_rates_len = 0;
1645 if (elems.supp_rates) {
1646 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1647 if (clen > elems.supp_rates_len)
1648 clen = elems.supp_rates_len;
1649 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1651 bss->supp_rates_len += clen;
1653 if (elems.ext_supp_rates) {
1654 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1655 if (clen > elems.ext_supp_rates_len)
1656 clen = elems.ext_supp_rates_len;
1657 memcpy(&bss->supp_rates[bss->supp_rates_len],
1658 elems.ext_supp_rates, clen);
1659 bss->supp_rates_len += clen;
1663 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1664 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1666 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1668 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1669 bss->wpa_ie_len = elems.wpa_len + 2;
1671 bss->wpa_ie_len = 0;
1672 } else if (!elems.wpa && bss->wpa_ie) {
1675 bss->wpa_ie_len = 0;
1679 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1680 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1682 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1684 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1685 bss->rsn_ie_len = elems.rsn_len + 2;
1687 bss->rsn_ie_len = 0;
1688 } else if (!elems.rsn && bss->rsn_ie) {
1691 bss->rsn_ie_len = 0;
1694 if (elems.wmm_param &&
1695 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1696 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1698 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1700 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1701 elems.wmm_param_len + 2);
1702 bss->wmm_ie_len = elems.wmm_param_len + 2;
1704 bss->wmm_ie_len = 0;
1705 } else if (!elems.wmm_param && bss->wmm_ie) {
1708 bss->wmm_ie_len = 0;
1710 if (elems.ht_cap_elem &&
1711 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
1712 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
1714 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
1716 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
1717 elems.ht_cap_elem_len + 2);
1718 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
1721 } else if (!elems.ht_cap_elem && bss->ht_ie) {
1727 bss->hw_mode = rx_status->phymode;
1728 bss->freq = rx_status->freq;
1729 if (channel != rx_status->channel &&
1730 (bss->hw_mode == MODE_IEEE80211G ||
1731 bss->hw_mode == MODE_IEEE80211B) &&
1732 channel >= 1 && channel <= 14) {
1733 static const int freq_list[] = {
1734 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1735 2447, 2452, 2457, 2462, 2467, 2472, 2484
1737 /* IEEE 802.11g/b mode can receive packets from neighboring
1738 * channels, so map the channel into frequency. */
1739 bss->freq = freq_list[channel - 1];
1741 bss->timestamp = timestamp;
1742 bss->last_update = jiffies;
1743 bss->rssi = rx_status->ssi;
1744 bss->signal = rx_status->signal;
1745 bss->noise = rx_status->noise;
1748 ieee80211_rx_bss_put(dev, bss);
1752 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1753 struct ieee80211_mgmt *mgmt,
1755 struct ieee80211_rx_status *rx_status)
1757 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1761 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1762 struct ieee80211_mgmt *mgmt,
1764 struct ieee80211_rx_status *rx_status)
1766 struct ieee80211_sub_if_data *sdata;
1767 struct ieee80211_if_sta *ifsta;
1769 struct ieee802_11_elems elems;
1771 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1773 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1774 if (sdata->type != IEEE80211_IF_TYPE_STA)
1776 ifsta = &sdata->u.sta;
1778 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
1779 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1782 /* Process beacon from the current BSS */
1783 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1787 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1789 if (elems.erp_info && elems.erp_info_len >= 1)
1790 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1792 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1793 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1794 elems.wmm_param_len);
1799 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1800 struct ieee80211_if_sta *ifsta,
1801 struct ieee80211_mgmt *mgmt,
1803 struct ieee80211_rx_status *rx_status)
1805 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1806 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1808 struct sk_buff *skb;
1809 struct ieee80211_mgmt *resp;
1811 DECLARE_MAC_BUF(mac);
1812 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1813 DECLARE_MAC_BUF(mac2);
1814 DECLARE_MAC_BUF(mac3);
1817 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1818 ifsta->state != IEEE80211_IBSS_JOINED ||
1819 len < 24 + 2 || !ifsta->probe_resp)
1822 if (local->ops->tx_last_beacon)
1823 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1827 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1828 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
1829 "%s (tx_last_beacon=%d)\n",
1830 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
1831 print_mac(mac3, mgmt->bssid), tx_last_beacon);
1832 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1834 if (!tx_last_beacon)
1837 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1838 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1841 end = ((u8 *) mgmt) + len;
1842 pos = mgmt->u.probe_req.variable;
1843 if (pos[0] != WLAN_EID_SSID ||
1844 pos + 2 + pos[1] > end) {
1845 if (net_ratelimit()) {
1846 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1848 dev->name, print_mac(mac, mgmt->sa));
1853 (pos[1] != ifsta->ssid_len ||
1854 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1855 /* Ignore ProbeReq for foreign SSID */
1859 /* Reply with ProbeResp */
1860 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
1864 resp = (struct ieee80211_mgmt *) skb->data;
1865 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1866 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1867 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
1868 dev->name, print_mac(mac, resp->da));
1869 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1870 ieee80211_sta_tx(dev, skb, 0);
1874 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1875 struct ieee80211_rx_status *rx_status)
1877 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1878 struct ieee80211_sub_if_data *sdata;
1879 struct ieee80211_if_sta *ifsta;
1880 struct ieee80211_mgmt *mgmt;
1886 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1887 ifsta = &sdata->u.sta;
1889 mgmt = (struct ieee80211_mgmt *) skb->data;
1890 fc = le16_to_cpu(mgmt->frame_control);
1892 switch (fc & IEEE80211_FCTL_STYPE) {
1893 case IEEE80211_STYPE_PROBE_REQ:
1894 case IEEE80211_STYPE_PROBE_RESP:
1895 case IEEE80211_STYPE_BEACON:
1896 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1897 case IEEE80211_STYPE_AUTH:
1898 case IEEE80211_STYPE_ASSOC_RESP:
1899 case IEEE80211_STYPE_REASSOC_RESP:
1900 case IEEE80211_STYPE_DEAUTH:
1901 case IEEE80211_STYPE_DISASSOC:
1902 skb_queue_tail(&ifsta->skb_queue, skb);
1903 queue_work(local->hw.workqueue, &ifsta->work);
1906 printk(KERN_DEBUG "%s: received unknown management frame - "
1907 "stype=%d\n", dev->name,
1908 (fc & IEEE80211_FCTL_STYPE) >> 4);
1917 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1918 struct sk_buff *skb)
1920 struct ieee80211_rx_status *rx_status;
1921 struct ieee80211_sub_if_data *sdata;
1922 struct ieee80211_if_sta *ifsta;
1923 struct ieee80211_mgmt *mgmt;
1926 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1927 ifsta = &sdata->u.sta;
1929 rx_status = (struct ieee80211_rx_status *) skb->cb;
1930 mgmt = (struct ieee80211_mgmt *) skb->data;
1931 fc = le16_to_cpu(mgmt->frame_control);
1933 switch (fc & IEEE80211_FCTL_STYPE) {
1934 case IEEE80211_STYPE_PROBE_REQ:
1935 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1938 case IEEE80211_STYPE_PROBE_RESP:
1939 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1941 case IEEE80211_STYPE_BEACON:
1942 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1944 case IEEE80211_STYPE_AUTH:
1945 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1947 case IEEE80211_STYPE_ASSOC_RESP:
1948 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1950 case IEEE80211_STYPE_REASSOC_RESP:
1951 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1953 case IEEE80211_STYPE_DEAUTH:
1954 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1956 case IEEE80211_STYPE_DISASSOC:
1957 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1965 ieee80211_txrx_result
1966 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1967 struct ieee80211_rx_status *rx_status)
1969 struct ieee80211_mgmt *mgmt;
1975 mgmt = (struct ieee80211_mgmt *) skb->data;
1976 fc = le16_to_cpu(mgmt->frame_control);
1978 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
1979 return TXRX_CONTINUE;
1984 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1985 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1986 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1987 skb->len, rx_status);
1990 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1991 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1997 return TXRX_CONTINUE;
2001 static int ieee80211_sta_active_ibss(struct net_device *dev)
2003 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2005 struct sta_info *sta;
2007 read_lock_bh(&local->sta_lock);
2008 list_for_each_entry(sta, &local->sta_list, list) {
2009 if (sta->dev == dev &&
2010 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2016 read_unlock_bh(&local->sta_lock);
2022 static void ieee80211_sta_expire(struct net_device *dev)
2024 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2025 struct sta_info *sta, *tmp;
2026 LIST_HEAD(tmp_list);
2027 DECLARE_MAC_BUF(mac);
2029 write_lock_bh(&local->sta_lock);
2030 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2031 if (time_after(jiffies, sta->last_rx +
2032 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2033 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2034 dev->name, print_mac(mac, sta->addr));
2035 __sta_info_get(sta);
2036 sta_info_remove(sta);
2037 list_add(&sta->list, &tmp_list);
2039 write_unlock_bh(&local->sta_lock);
2041 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2048 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2049 struct ieee80211_if_sta *ifsta)
2051 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2053 ieee80211_sta_expire(dev);
2054 if (ieee80211_sta_active_ibss(dev))
2057 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2058 "IBSS networks with same SSID (merge)\n", dev->name);
2059 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2063 void ieee80211_sta_timer(unsigned long data)
2065 struct ieee80211_sub_if_data *sdata =
2066 (struct ieee80211_sub_if_data *) data;
2067 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2068 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2070 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2071 queue_work(local->hw.workqueue, &ifsta->work);
2075 void ieee80211_sta_work(struct work_struct *work)
2077 struct ieee80211_sub_if_data *sdata =
2078 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2079 struct net_device *dev = sdata->dev;
2080 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2081 struct ieee80211_if_sta *ifsta;
2082 struct sk_buff *skb;
2084 if (!netif_running(dev))
2087 if (local->sta_sw_scanning || local->sta_hw_scanning)
2090 if (sdata->type != IEEE80211_IF_TYPE_STA &&
2091 sdata->type != IEEE80211_IF_TYPE_IBSS) {
2092 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2093 "(type=%d)\n", dev->name, sdata->type);
2096 ifsta = &sdata->u.sta;
2098 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2099 ieee80211_sta_rx_queued_mgmt(dev, skb);
2101 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2102 ifsta->state != IEEE80211_ASSOCIATE &&
2103 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2104 if (ifsta->scan_ssid_len)
2105 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2107 ieee80211_sta_start_scan(dev, NULL, 0);
2111 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2112 if (ieee80211_sta_config_auth(dev, ifsta))
2114 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2115 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2118 switch (ifsta->state) {
2119 case IEEE80211_DISABLED:
2121 case IEEE80211_AUTHENTICATE:
2122 ieee80211_authenticate(dev, ifsta);
2124 case IEEE80211_ASSOCIATE:
2125 ieee80211_associate(dev, ifsta);
2127 case IEEE80211_ASSOCIATED:
2128 ieee80211_associated(dev, ifsta);
2130 case IEEE80211_IBSS_SEARCH:
2131 ieee80211_sta_find_ibss(dev, ifsta);
2133 case IEEE80211_IBSS_JOINED:
2134 ieee80211_sta_merge_ibss(dev, ifsta);
2137 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2142 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2143 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2144 "mixed-cell disabled - disassociate\n", dev->name);
2146 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2147 ieee80211_set_disassoc(dev, ifsta, 0);
2152 static void ieee80211_sta_reset_auth(struct net_device *dev,
2153 struct ieee80211_if_sta *ifsta)
2155 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2157 if (local->ops->reset_tsf) {
2158 /* Reset own TSF to allow time synchronization work. */
2159 local->ops->reset_tsf(local_to_hw(local));
2162 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2165 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2166 ifsta->auth_alg = WLAN_AUTH_OPEN;
2167 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2168 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2169 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2170 ifsta->auth_alg = WLAN_AUTH_LEAP;
2172 ifsta->auth_alg = WLAN_AUTH_OPEN;
2173 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2175 ifsta->auth_transaction = -1;
2176 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2177 ifsta->auth_tries = ifsta->assoc_tries = 0;
2178 netif_carrier_off(dev);
2182 void ieee80211_sta_req_auth(struct net_device *dev,
2183 struct ieee80211_if_sta *ifsta)
2185 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2186 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2188 if (sdata->type != IEEE80211_IF_TYPE_STA)
2191 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2192 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2193 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2194 IEEE80211_STA_AUTO_SSID_SEL))) {
2195 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2196 queue_work(local->hw.workqueue, &ifsta->work);
2200 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2201 const char *ssid, int ssid_len)
2203 int tmp, hidden_ssid;
2205 if (ssid_len == ifsta->ssid_len &&
2206 !memcmp(ifsta->ssid, ssid, ssid_len))
2209 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2215 if (ssid[tmp] != '\0') {
2221 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2224 if (ssid_len == 1 && ssid[0] == ' ')
2230 static int ieee80211_sta_config_auth(struct net_device *dev,
2231 struct ieee80211_if_sta *ifsta)
2233 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2234 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2235 struct ieee80211_sta_bss *bss, *selected = NULL;
2236 int top_rssi = 0, freq;
2238 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2239 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2240 ifsta->state = IEEE80211_AUTHENTICATE;
2241 ieee80211_sta_reset_auth(dev, ifsta);
2245 spin_lock_bh(&local->sta_bss_lock);
2246 freq = local->oper_channel->freq;
2247 list_for_each_entry(bss, &local->sta_bss_list, list) {
2248 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2251 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2252 !!sdata->default_key)
2255 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2259 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2260 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2263 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2264 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2267 if (!selected || top_rssi < bss->rssi) {
2269 top_rssi = bss->rssi;
2273 atomic_inc(&selected->users);
2274 spin_unlock_bh(&local->sta_bss_lock);
2277 ieee80211_set_channel(local, -1, selected->freq);
2278 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2279 ieee80211_sta_set_ssid(dev, selected->ssid,
2280 selected->ssid_len);
2281 ieee80211_sta_set_bssid(dev, selected->bssid);
2282 ieee80211_rx_bss_put(dev, selected);
2283 ifsta->state = IEEE80211_AUTHENTICATE;
2284 ieee80211_sta_reset_auth(dev, ifsta);
2287 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2288 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2289 ieee80211_sta_start_scan(dev, NULL, 0);
2291 ieee80211_sta_start_scan(dev, ifsta->ssid,
2293 ifsta->state = IEEE80211_AUTHENTICATE;
2294 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2296 ifsta->state = IEEE80211_DISABLED;
2301 static int ieee80211_sta_join_ibss(struct net_device *dev,
2302 struct ieee80211_if_sta *ifsta,
2303 struct ieee80211_sta_bss *bss)
2305 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2306 int res, rates, i, j;
2307 struct sk_buff *skb;
2308 struct ieee80211_mgmt *mgmt;
2309 struct ieee80211_tx_control control;
2310 struct ieee80211_rate *rate;
2311 struct ieee80211_hw_mode *mode;
2312 struct rate_control_extra extra;
2314 struct ieee80211_sub_if_data *sdata;
2316 /* Remove possible STA entries from other IBSS networks. */
2317 sta_info_flush(local, NULL);
2319 if (local->ops->reset_tsf) {
2320 /* Reset own TSF to allow time synchronization work. */
2321 local->ops->reset_tsf(local_to_hw(local));
2323 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2324 res = ieee80211_if_config(dev);
2328 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2330 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2331 sdata->drop_unencrypted = bss->capability &
2332 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2334 res = ieee80211_set_channel(local, -1, bss->freq);
2336 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2337 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2338 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2339 local->hw.conf.freq);
2343 /* Set beacon template based on scan results */
2344 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2349 skb_reserve(skb, local->hw.extra_tx_headroom);
2351 mgmt = (struct ieee80211_mgmt *)
2352 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2353 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2354 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2355 IEEE80211_STYPE_BEACON);
2356 memset(mgmt->da, 0xff, ETH_ALEN);
2357 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2358 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2359 mgmt->u.beacon.beacon_int =
2360 cpu_to_le16(local->hw.conf.beacon_int);
2361 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2363 pos = skb_put(skb, 2 + ifsta->ssid_len);
2364 *pos++ = WLAN_EID_SSID;
2365 *pos++ = ifsta->ssid_len;
2366 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2368 rates = bss->supp_rates_len;
2371 pos = skb_put(skb, 2 + rates);
2372 *pos++ = WLAN_EID_SUPP_RATES;
2374 memcpy(pos, bss->supp_rates, rates);
2376 pos = skb_put(skb, 2 + 1);
2377 *pos++ = WLAN_EID_DS_PARAMS;
2379 *pos++ = bss->channel;
2381 pos = skb_put(skb, 2 + 2);
2382 *pos++ = WLAN_EID_IBSS_PARAMS;
2384 /* FIX: set ATIM window based on scan results */
2388 if (bss->supp_rates_len > 8) {
2389 rates = bss->supp_rates_len - 8;
2390 pos = skb_put(skb, 2 + rates);
2391 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2393 memcpy(pos, &bss->supp_rates[8], rates);
2396 memset(&control, 0, sizeof(control));
2397 memset(&extra, 0, sizeof(extra));
2398 extra.mode = local->oper_hw_mode;
2399 rate = rate_control_get_rate(local, dev, skb, &extra);
2401 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2402 "for IBSS beacon\n", dev->name);
2406 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
2407 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2408 rate->val2 : rate->val;
2409 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2410 control.power_level = local->hw.conf.power_level;
2411 control.flags |= IEEE80211_TXCTL_NO_ACK;
2412 control.retry_limit = 1;
2414 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2415 if (ifsta->probe_resp) {
2416 mgmt = (struct ieee80211_mgmt *)
2417 ifsta->probe_resp->data;
2418 mgmt->frame_control =
2419 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2420 IEEE80211_STYPE_PROBE_RESP);
2422 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2423 "template for IBSS\n", dev->name);
2426 if (local->ops->beacon_update &&
2427 local->ops->beacon_update(local_to_hw(local),
2428 skb, &control) == 0) {
2429 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2430 "template based on scan results\n", dev->name);
2435 mode = local->oper_hw_mode;
2436 for (i = 0; i < bss->supp_rates_len; i++) {
2437 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2438 for (j = 0; j < mode->num_rates; j++)
2439 if (mode->rates[j].rate == bitrate)
2442 ifsta->supp_rates_bits = rates;
2446 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2447 "template\n", dev->name);
2451 ifsta->state = IEEE80211_IBSS_JOINED;
2452 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2454 ieee80211_rx_bss_put(dev, bss);
2460 static int ieee80211_sta_create_ibss(struct net_device *dev,
2461 struct ieee80211_if_sta *ifsta)
2463 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2464 struct ieee80211_sta_bss *bss;
2465 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2466 struct ieee80211_hw_mode *mode;
2467 u8 bssid[ETH_ALEN], *pos;
2469 DECLARE_MAC_BUF(mac);
2472 /* Easier testing, use fixed BSSID. */
2473 memset(bssid, 0xfe, ETH_ALEN);
2475 /* Generate random, not broadcast, locally administered BSSID. Mix in
2476 * own MAC address to make sure that devices that do not have proper
2477 * random number generator get different BSSID. */
2478 get_random_bytes(bssid, ETH_ALEN);
2479 for (i = 0; i < ETH_ALEN; i++)
2480 bssid[i] ^= dev->dev_addr[i];
2485 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2486 dev->name, print_mac(mac, bssid));
2488 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2489 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2493 mode = local->oper_hw_mode;
2495 if (local->hw.conf.beacon_int == 0)
2496 local->hw.conf.beacon_int = 100;
2497 bss->beacon_int = local->hw.conf.beacon_int;
2498 bss->hw_mode = local->hw.conf.phymode;
2499 bss->freq = local->hw.conf.freq;
2500 bss->last_update = jiffies;
2501 bss->capability = WLAN_CAPABILITY_IBSS;
2502 if (sdata->default_key) {
2503 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2505 sdata->drop_unencrypted = 0;
2506 bss->supp_rates_len = mode->num_rates;
2507 pos = bss->supp_rates;
2508 for (i = 0; i < mode->num_rates; i++) {
2509 int rate = mode->rates[i].rate;
2510 *pos++ = (u8) (rate / 5);
2513 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2517 static int ieee80211_sta_find_ibss(struct net_device *dev,
2518 struct ieee80211_if_sta *ifsta)
2520 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2521 struct ieee80211_sta_bss *bss;
2525 DECLARE_MAC_BUF(mac);
2526 DECLARE_MAC_BUF(mac2);
2528 if (ifsta->ssid_len == 0)
2531 active_ibss = ieee80211_sta_active_ibss(dev);
2532 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2533 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2534 dev->name, active_ibss);
2535 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2536 spin_lock_bh(&local->sta_bss_lock);
2537 list_for_each_entry(bss, &local->sta_bss_list, list) {
2538 if (ifsta->ssid_len != bss->ssid_len ||
2539 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2540 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2542 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2543 printk(KERN_DEBUG " bssid=%s found\n",
2544 print_mac(mac, bss->bssid));
2545 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2546 memcpy(bssid, bss->bssid, ETH_ALEN);
2548 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2551 spin_unlock_bh(&local->sta_bss_lock);
2553 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2554 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2555 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
2556 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2557 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2558 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2559 ifsta->ssid, ifsta->ssid_len))) {
2560 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2561 " based on configured SSID\n",
2562 dev->name, print_mac(mac, bssid));
2563 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2565 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2566 printk(KERN_DEBUG " did not try to join ibss\n");
2567 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2569 /* Selected IBSS not found in current scan results - try to scan */
2570 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2571 !ieee80211_sta_active_ibss(dev)) {
2572 mod_timer(&ifsta->timer, jiffies +
2573 IEEE80211_IBSS_MERGE_INTERVAL);
2574 } else if (time_after(jiffies, local->last_scan_completed +
2575 IEEE80211_SCAN_INTERVAL)) {
2576 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2577 "join\n", dev->name);
2578 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2580 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2581 int interval = IEEE80211_SCAN_INTERVAL;
2583 if (time_after(jiffies, ifsta->ibss_join_req +
2584 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2585 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2586 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2587 return ieee80211_sta_create_ibss(dev, ifsta);
2588 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2589 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2590 " configured channel %d (%d MHz)\n",
2591 dev->name, local->hw.conf.channel,
2592 local->hw.conf.freq);
2595 /* No IBSS found - decrease scan interval and continue
2597 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2600 ifsta->state = IEEE80211_IBSS_SEARCH;
2601 mod_timer(&ifsta->timer, jiffies + interval);
2609 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2611 struct ieee80211_sub_if_data *sdata;
2612 struct ieee80211_if_sta *ifsta;
2613 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2615 if (len > IEEE80211_MAX_SSID_LEN)
2618 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2620 if (local->ops->conf_tx) {
2621 struct ieee80211_tx_queue_params qparam;
2624 memset(&qparam, 0, sizeof(qparam));
2625 /* TODO: are these ok defaults for all hw_modes? */
2628 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2629 qparam.cw_max = 1023;
2630 qparam.burst_time = 0;
2631 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2633 local->ops->conf_tx(local_to_hw(local),
2634 i + IEEE80211_TX_QUEUE_DATA0,
2637 /* IBSS uses different parameters for Beacon sending */
2641 local->ops->conf_tx(local_to_hw(local),
2642 IEEE80211_TX_QUEUE_BEACON, &qparam);
2645 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2646 ifsta = &sdata->u.sta;
2648 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2649 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
2650 memcpy(ifsta->ssid, ssid, len);
2651 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2652 ifsta->ssid_len = len;
2655 ifsta->flags |= IEEE80211_STA_SSID_SET;
2657 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2658 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2659 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
2660 ifsta->ibss_join_req = jiffies;
2661 ifsta->state = IEEE80211_IBSS_SEARCH;
2662 return ieee80211_sta_find_ibss(dev, ifsta);
2668 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2670 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2671 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2672 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2673 *len = ifsta->ssid_len;
2678 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2680 struct ieee80211_sub_if_data *sdata;
2681 struct ieee80211_if_sta *ifsta;
2684 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2685 ifsta = &sdata->u.sta;
2687 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2688 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2689 res = ieee80211_if_config(dev);
2691 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2692 "the low-level driver\n", dev->name);
2697 if (is_valid_ether_addr(bssid))
2698 ifsta->flags |= IEEE80211_STA_BSSID_SET;
2700 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
2706 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2707 struct ieee80211_sub_if_data *sdata,
2710 struct sk_buff *skb;
2711 struct ieee80211_hdr *nullfunc;
2714 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2716 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2717 "frame\n", sdata->dev->name);
2720 skb_reserve(skb, local->hw.extra_tx_headroom);
2722 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2723 memset(nullfunc, 0, 24);
2724 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2725 IEEE80211_FCTL_TODS;
2727 fc |= IEEE80211_FCTL_PM;
2728 nullfunc->frame_control = cpu_to_le16(fc);
2729 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2730 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2731 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2733 ieee80211_sta_tx(sdata->dev, skb, 0);
2737 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2739 struct ieee80211_local *local = hw_to_local(hw);
2740 struct net_device *dev = local->scan_dev;
2741 struct ieee80211_sub_if_data *sdata;
2742 union iwreq_data wrqu;
2744 local->last_scan_completed = jiffies;
2745 memset(&wrqu, 0, sizeof(wrqu));
2746 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2748 if (local->sta_hw_scanning) {
2749 local->sta_hw_scanning = 0;
2753 local->sta_sw_scanning = 0;
2754 if (ieee80211_hw_config(local))
2755 printk(KERN_DEBUG "%s: failed to restore operational "
2756 "channel after scan\n", dev->name);
2759 netif_tx_lock_bh(local->mdev);
2760 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
2761 local->ops->configure_filter(local_to_hw(local),
2762 FIF_BCN_PRBRESP_PROMISC,
2763 &local->filter_flags,
2764 local->mdev->mc_count,
2765 local->mdev->mc_list);
2767 netif_tx_unlock_bh(local->mdev);
2770 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2772 /* No need to wake the master device. */
2773 if (sdata->dev == local->mdev)
2776 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2777 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
2778 ieee80211_send_nullfunc(local, sdata, 0);
2779 ieee80211_sta_timer((unsigned long)sdata);
2782 netif_wake_queue(sdata->dev);
2787 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2788 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2789 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2790 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
2791 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2792 !ieee80211_sta_active_ibss(dev)))
2793 ieee80211_sta_find_ibss(dev, ifsta);
2796 EXPORT_SYMBOL(ieee80211_scan_completed);
2798 void ieee80211_sta_scan_work(struct work_struct *work)
2800 struct ieee80211_local *local =
2801 container_of(work, struct ieee80211_local, scan_work.work);
2802 struct net_device *dev = local->scan_dev;
2803 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2804 struct ieee80211_hw_mode *mode;
2805 struct ieee80211_channel *chan;
2807 unsigned long next_delay = 0;
2809 if (!local->sta_sw_scanning)
2812 switch (local->scan_state) {
2813 case SCAN_SET_CHANNEL:
2814 mode = local->scan_hw_mode;
2815 if (local->scan_hw_mode->list.next == &local->modes_list &&
2816 local->scan_channel_idx >= mode->num_channels) {
2817 ieee80211_scan_completed(local_to_hw(local));
2820 skip = !(local->enabled_modes & (1 << mode->mode));
2821 chan = &mode->channels[local->scan_channel_idx];
2822 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2823 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2824 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2825 (local->hw_modes & local->enabled_modes &
2826 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2831 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2832 dev->name, chan->chan, chan->freq);
2835 local->scan_channel = chan;
2836 if (ieee80211_hw_config(local)) {
2837 printk(KERN_DEBUG "%s: failed to set channel "
2838 "%d (%d MHz) for scan\n", dev->name,
2839 chan->chan, chan->freq);
2844 local->scan_channel_idx++;
2845 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2846 if (local->scan_hw_mode->list.next != &local->modes_list) {
2847 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2848 struct ieee80211_hw_mode,
2850 local->scan_channel_idx = 0;
2857 next_delay = IEEE80211_PROBE_DELAY +
2858 usecs_to_jiffies(local->hw.channel_change_time);
2859 local->scan_state = SCAN_SEND_PROBE;
2861 case SCAN_SEND_PROBE:
2862 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2863 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2864 local->scan_ssid_len);
2865 next_delay = IEEE80211_CHANNEL_TIME;
2867 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2868 local->scan_state = SCAN_SET_CHANNEL;
2872 if (local->sta_sw_scanning)
2873 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2878 static int ieee80211_sta_start_scan(struct net_device *dev,
2879 u8 *ssid, size_t ssid_len)
2881 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2882 struct ieee80211_sub_if_data *sdata;
2884 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2887 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2888 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2891 * ScanType: ACTIVE, PASSIVE
2892 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2893 * a Probe frame during active scanning
2895 * MinChannelTime (>= ProbeDelay), in TU
2896 * MaxChannelTime: (>= MinChannelTime), in TU
2899 /* MLME-SCAN.confirm
2901 * ResultCode: SUCCESS, INVALID_PARAMETERS
2904 if (local->sta_sw_scanning || local->sta_hw_scanning) {
2905 if (local->scan_dev == dev)
2910 if (local->ops->hw_scan) {
2911 int rc = local->ops->hw_scan(local_to_hw(local),
2914 local->sta_hw_scanning = 1;
2915 local->scan_dev = dev;
2920 local->sta_sw_scanning = 1;
2923 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
2925 /* Don't stop the master interface, otherwise we can't transmit
2927 if (sdata->dev == local->mdev)
2930 netif_stop_queue(sdata->dev);
2931 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2932 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
2933 ieee80211_send_nullfunc(local, sdata, 1);
2938 local->scan_ssid_len = ssid_len;
2939 memcpy(local->scan_ssid, ssid, ssid_len);
2941 local->scan_ssid_len = 0;
2942 local->scan_state = SCAN_SET_CHANNEL;
2943 local->scan_hw_mode = list_entry(local->modes_list.next,
2944 struct ieee80211_hw_mode,
2946 local->scan_channel_idx = 0;
2947 local->scan_dev = dev;
2949 netif_tx_lock_bh(local->mdev);
2950 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
2951 local->ops->configure_filter(local_to_hw(local),
2952 FIF_BCN_PRBRESP_PROMISC,
2953 &local->filter_flags,
2954 local->mdev->mc_count,
2955 local->mdev->mc_list);
2956 netif_tx_unlock_bh(local->mdev);
2958 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2959 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2960 IEEE80211_CHANNEL_TIME);
2966 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2968 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2969 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2970 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2972 if (sdata->type != IEEE80211_IF_TYPE_STA)
2973 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2975 if (local->sta_sw_scanning || local->sta_hw_scanning) {
2976 if (local->scan_dev == dev)
2981 ifsta->scan_ssid_len = ssid_len;
2983 memcpy(ifsta->scan_ssid, ssid, ssid_len);
2984 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2985 queue_work(local->hw.workqueue, &ifsta->work);
2990 ieee80211_sta_scan_result(struct net_device *dev,
2991 struct ieee80211_sta_bss *bss,
2992 char *current_ev, char *end_buf)
2994 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2995 struct iw_event iwe;
2997 if (time_after(jiffies,
2998 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3001 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3004 memset(&iwe, 0, sizeof(iwe));
3005 iwe.cmd = SIOCGIWAP;
3006 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3007 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3008 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3011 memset(&iwe, 0, sizeof(iwe));
3012 iwe.cmd = SIOCGIWESSID;
3013 iwe.u.data.length = bss->ssid_len;
3014 iwe.u.data.flags = 1;
3015 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3018 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3019 memset(&iwe, 0, sizeof(iwe));
3020 iwe.cmd = SIOCGIWMODE;
3021 if (bss->capability & WLAN_CAPABILITY_ESS)
3022 iwe.u.mode = IW_MODE_MASTER;
3024 iwe.u.mode = IW_MODE_ADHOC;
3025 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3029 memset(&iwe, 0, sizeof(iwe));
3030 iwe.cmd = SIOCGIWFREQ;
3031 iwe.u.freq.m = bss->channel;
3033 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3035 iwe.u.freq.m = bss->freq * 100000;
3037 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3040 memset(&iwe, 0, sizeof(iwe));
3042 iwe.u.qual.qual = bss->signal;
3043 iwe.u.qual.level = bss->rssi;
3044 iwe.u.qual.noise = bss->noise;
3045 iwe.u.qual.updated = local->wstats_flags;
3046 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3049 memset(&iwe, 0, sizeof(iwe));
3050 iwe.cmd = SIOCGIWENCODE;
3051 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3052 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3054 iwe.u.data.flags = IW_ENCODE_DISABLED;
3055 iwe.u.data.length = 0;
3056 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3058 if (bss && bss->wpa_ie) {
3059 memset(&iwe, 0, sizeof(iwe));
3060 iwe.cmd = IWEVGENIE;
3061 iwe.u.data.length = bss->wpa_ie_len;
3062 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3066 if (bss && bss->rsn_ie) {
3067 memset(&iwe, 0, sizeof(iwe));
3068 iwe.cmd = IWEVGENIE;
3069 iwe.u.data.length = bss->rsn_ie_len;
3070 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3074 if (bss && bss->supp_rates_len > 0) {
3075 /* display all supported rates in readable format */
3076 char *p = current_ev + IW_EV_LCP_LEN;
3079 memset(&iwe, 0, sizeof(iwe));
3080 iwe.cmd = SIOCGIWRATE;
3081 /* Those two flags are ignored... */
3082 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3084 for (i = 0; i < bss->supp_rates_len; i++) {
3085 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3087 p = iwe_stream_add_value(current_ev, p,
3088 end_buf, &iwe, IW_EV_PARAM_LEN);
3095 buf = kmalloc(30, GFP_ATOMIC);
3097 memset(&iwe, 0, sizeof(iwe));
3098 iwe.cmd = IWEVCUSTOM;
3099 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3100 iwe.u.data.length = strlen(buf);
3101 current_ev = iwe_stream_add_point(current_ev, end_buf,
3110 buf = kmalloc(100, GFP_ATOMIC);
3114 memset(&iwe, 0, sizeof(iwe));
3115 iwe.cmd = IWEVCUSTOM;
3116 sprintf(buf, "bcn_int=%d", bss->beacon_int);
3117 iwe.u.data.length = strlen(buf);
3118 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3121 memset(&iwe, 0, sizeof(iwe));
3122 iwe.cmd = IWEVCUSTOM;
3123 sprintf(buf, "capab=0x%04x", bss->capability);
3124 iwe.u.data.length = strlen(buf);
3125 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3136 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3138 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3139 char *current_ev = buf;
3140 char *end_buf = buf + len;
3141 struct ieee80211_sta_bss *bss;
3143 spin_lock_bh(&local->sta_bss_lock);
3144 list_for_each_entry(bss, &local->sta_bss_list, list) {
3145 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3146 spin_unlock_bh(&local->sta_bss_lock);
3149 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3152 spin_unlock_bh(&local->sta_bss_lock);
3153 return current_ev - buf;
3157 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3159 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3160 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3161 kfree(ifsta->extra_ie);
3163 ifsta->extra_ie = NULL;
3164 ifsta->extra_ie_len = 0;
3167 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3168 if (!ifsta->extra_ie) {
3169 ifsta->extra_ie_len = 0;
3172 memcpy(ifsta->extra_ie, ie, len);
3173 ifsta->extra_ie_len = len;
3178 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3179 struct sk_buff *skb, u8 *bssid,
3182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3183 struct sta_info *sta;
3184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3185 DECLARE_MAC_BUF(mac);
3187 /* TODO: Could consider removing the least recently used entry and
3188 * allow new one to be added. */
3189 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3190 if (net_ratelimit()) {
3191 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3192 "entry %s\n", dev->name, print_mac(mac, addr));
3197 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3198 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3200 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3204 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3206 rate_control_rate_init(sta, local);
3208 return sta; /* caller will call sta_info_put() */
3212 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3214 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3215 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3217 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3220 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3221 sdata->type != IEEE80211_IF_TYPE_IBSS)
3224 ieee80211_send_deauth(dev, ifsta, reason);
3225 ieee80211_set_disassoc(dev, ifsta, 1);
3230 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3232 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3233 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3235 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3238 if (sdata->type != IEEE80211_IF_TYPE_STA)
3241 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3244 ieee80211_send_disassoc(dev, ifsta, reason);
3245 ieee80211_set_disassoc(dev, ifsta, 0);