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 = 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));
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,
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 this was a reassociation, ensure we try a "full"
1191 * association next time. This works around some broken APs
1192 * which do not correctly reject reassociation requests. */
1193 ifsta->prev_bssid_set = 0;
1197 pos = mgmt->u.assoc_resp.variable;
1198 if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems)
1200 printk(KERN_DEBUG "%s: failed to parse AssocResp\n",
1205 if (!elems.supp_rates) {
1206 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1211 /* it probably doesn't, but if the frame includes an ERP value then
1212 * update our stored copy */
1213 if (elems.erp_info && elems.erp_info_len >= 1) {
1214 struct ieee80211_sta_bss *bss
1215 = ieee80211_rx_bss_get(dev, ifsta->bssid);
1217 bss->erp_value = elems.erp_info[0];
1218 bss->has_erp_value = 1;
1219 ieee80211_rx_bss_put(dev, bss);
1223 printk(KERN_DEBUG "%s: associated\n", dev->name);
1225 ifsta->ap_capab = capab_info;
1227 kfree(ifsta->assocresp_ies);
1228 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1229 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC);
1230 if (ifsta->assocresp_ies)
1231 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1233 ieee80211_set_associated(dev, ifsta, 1);
1235 /* Add STA entry for the AP */
1236 sta = sta_info_get(local, ifsta->bssid);
1238 struct ieee80211_sta_bss *bss;
1239 sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC);
1241 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1242 " AP\n", dev->name);
1245 bss = ieee80211_rx_bss_get(dev, ifsta->bssid);
1247 sta->last_rssi = bss->rssi;
1248 sta->last_signal = bss->signal;
1249 sta->last_noise = bss->noise;
1250 ieee80211_rx_bss_put(dev, bss);
1255 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
1259 mode = local->oper_hw_mode;
1260 for (i = 0; i < elems.supp_rates_len; i++) {
1261 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1262 if (mode->mode == MODE_ATHEROS_TURBO)
1264 for (j = 0; j < mode->num_rates; j++)
1265 if (mode->rates[j].rate == rate)
1268 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1269 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1270 if (mode->mode == MODE_ATHEROS_TURBO)
1272 for (j = 0; j < mode->num_rates; j++)
1273 if (mode->rates[j].rate == rate)
1276 sta->supp_rates = rates;
1278 rate_control_rate_init(sta, local);
1280 if (elems.wmm_param && ifsta->wmm_enabled) {
1281 sta->flags |= WLAN_STA_WME;
1282 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1283 elems.wmm_param_len);
1289 ieee80211_associated(dev, ifsta);
1293 /* Caller must hold local->sta_bss_lock */
1294 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1295 struct ieee80211_sta_bss *bss)
1297 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1298 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1299 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1303 /* Caller must hold local->sta_bss_lock */
1304 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1305 struct ieee80211_sta_bss *bss)
1307 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1308 struct ieee80211_sta_bss *b, *prev = NULL;
1309 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1313 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1316 prev->hnext = bss->hnext;
1325 static struct ieee80211_sta_bss *
1326 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
1328 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1329 struct ieee80211_sta_bss *bss;
1331 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1334 atomic_inc(&bss->users);
1335 atomic_inc(&bss->users);
1336 memcpy(bss->bssid, bssid, ETH_ALEN);
1338 spin_lock_bh(&local->sta_bss_lock);
1339 /* TODO: order by RSSI? */
1340 list_add_tail(&bss->list, &local->sta_bss_list);
1341 __ieee80211_rx_bss_hash_add(dev, bss);
1342 spin_unlock_bh(&local->sta_bss_lock);
1347 static struct ieee80211_sta_bss *
1348 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid)
1350 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1351 struct ieee80211_sta_bss *bss;
1353 spin_lock_bh(&local->sta_bss_lock);
1354 bss = local->sta_bss_hash[STA_HASH(bssid)];
1356 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) {
1357 atomic_inc(&bss->users);
1362 spin_unlock_bh(&local->sta_bss_lock);
1367 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1376 static void ieee80211_rx_bss_put(struct net_device *dev,
1377 struct ieee80211_sta_bss *bss)
1379 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1380 if (!atomic_dec_and_test(&bss->users))
1383 spin_lock_bh(&local->sta_bss_lock);
1384 __ieee80211_rx_bss_hash_del(dev, bss);
1385 list_del(&bss->list);
1386 spin_unlock_bh(&local->sta_bss_lock);
1387 ieee80211_rx_bss_free(bss);
1391 void ieee80211_rx_bss_list_init(struct net_device *dev)
1393 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1394 spin_lock_init(&local->sta_bss_lock);
1395 INIT_LIST_HEAD(&local->sta_bss_list);
1399 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1401 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1402 struct ieee80211_sta_bss *bss, *tmp;
1404 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1405 ieee80211_rx_bss_put(dev, bss);
1409 static void ieee80211_rx_bss_info(struct net_device *dev,
1410 struct ieee80211_mgmt *mgmt,
1412 struct ieee80211_rx_status *rx_status,
1415 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1416 struct ieee802_11_elems elems;
1418 int channel, invalid = 0, clen;
1419 struct ieee80211_sta_bss *bss;
1420 struct sta_info *sta;
1421 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1424 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1425 return; /* ignore ProbeResp to foreign address */
1428 printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n",
1429 dev->name, beacon ? "Beacon" : "Probe Response",
1430 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da));
1433 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1437 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1439 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1440 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1441 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1442 static unsigned long last_tsf_debug = 0;
1444 if (local->ops->get_tsf)
1445 tsf = local->ops->get_tsf(local_to_hw(local));
1448 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1449 printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID="
1450 MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld "
1452 MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid),
1453 (unsigned long long)tsf,
1454 (unsigned long long)timestamp,
1455 (unsigned long long)(tsf - timestamp),
1457 last_tsf_debug = jiffies;
1459 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1462 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1463 &elems) == ParseFailed)
1466 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1467 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1468 (sta = sta_info_get(local, mgmt->sa))) {
1469 struct ieee80211_hw_mode *mode;
1470 struct ieee80211_rate *rates;
1472 u32 supp_rates, prev_rates;
1475 mode = local->sta_scanning ?
1476 local->scan_hw_mode : local->oper_hw_mode;
1477 rates = mode->rates;
1478 num_rates = mode->num_rates;
1481 for (i = 0; i < elems.supp_rates_len +
1482 elems.ext_supp_rates_len; i++) {
1485 if (i < elems.supp_rates_len)
1486 rate = elems.supp_rates[i];
1487 else if (elems.ext_supp_rates)
1488 rate = elems.ext_supp_rates
1489 [i - elems.supp_rates_len];
1490 own_rate = 5 * (rate & 0x7f);
1491 if (mode->mode == MODE_ATHEROS_TURBO)
1493 for (j = 0; j < num_rates; j++)
1494 if (rates[j].rate == own_rate)
1495 supp_rates |= BIT(j);
1498 prev_rates = sta->supp_rates;
1499 sta->supp_rates &= supp_rates;
1500 if (sta->supp_rates == 0) {
1501 /* No matching rates - this should not really happen.
1502 * Make sure that at least one rate is marked
1503 * supported to avoid issues with TX rate ctrl. */
1504 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1506 if (sta->supp_rates != prev_rates) {
1507 printk(KERN_DEBUG "%s: updated supp_rates set for "
1508 MAC_FMT " based on beacon info (0x%x & 0x%x -> "
1510 dev->name, MAC_ARG(sta->addr), prev_rates,
1511 supp_rates, sta->supp_rates);
1519 if (elems.ds_params && elems.ds_params_len == 1)
1520 channel = elems.ds_params[0];
1522 channel = rx_status->channel;
1524 bss = ieee80211_rx_bss_get(dev, mgmt->bssid);
1526 bss = ieee80211_rx_bss_add(dev, mgmt->bssid);
1531 /* TODO: order by RSSI? */
1532 spin_lock_bh(&local->sta_bss_lock);
1533 list_move_tail(&bss->list, &local->sta_bss_list);
1534 spin_unlock_bh(&local->sta_bss_lock);
1538 if (bss->probe_resp && beacon) {
1539 /* Do not allow beacon to override data from Probe Response. */
1540 ieee80211_rx_bss_put(dev, bss);
1544 /* save the ERP value so that it is available at association time */
1545 if (elems.erp_info && elems.erp_info_len >= 1) {
1546 bss->erp_value = elems.erp_info[0];
1547 bss->has_erp_value = 1;
1550 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1551 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1552 if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) {
1553 memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1554 bss->ssid_len = elems.ssid_len;
1557 bss->supp_rates_len = 0;
1558 if (elems.supp_rates) {
1559 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1560 if (clen > elems.supp_rates_len)
1561 clen = elems.supp_rates_len;
1562 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1564 bss->supp_rates_len += clen;
1566 if (elems.ext_supp_rates) {
1567 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1568 if (clen > elems.ext_supp_rates_len)
1569 clen = elems.ext_supp_rates_len;
1570 memcpy(&bss->supp_rates[bss->supp_rates_len],
1571 elems.ext_supp_rates, clen);
1572 bss->supp_rates_len += clen;
1576 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1577 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1579 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1581 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1582 bss->wpa_ie_len = elems.wpa_len + 2;
1584 bss->wpa_ie_len = 0;
1585 } else if (!elems.wpa && bss->wpa_ie) {
1588 bss->wpa_ie_len = 0;
1592 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1593 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1595 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1597 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1598 bss->rsn_ie_len = elems.rsn_len + 2;
1600 bss->rsn_ie_len = 0;
1601 } else if (!elems.rsn && bss->rsn_ie) {
1604 bss->rsn_ie_len = 0;
1607 if (elems.wmm_param &&
1608 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1609 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1611 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1613 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1614 elems.wmm_param_len + 2);
1615 bss->wmm_ie_len = elems.wmm_param_len + 2;
1617 bss->wmm_ie_len = 0;
1618 } else if (!elems.wmm_param && bss->wmm_ie) {
1621 bss->wmm_ie_len = 0;
1625 bss->hw_mode = rx_status->phymode;
1626 bss->channel = channel;
1627 bss->freq = rx_status->freq;
1628 if (channel != rx_status->channel &&
1629 (bss->hw_mode == MODE_IEEE80211G ||
1630 bss->hw_mode == MODE_IEEE80211B) &&
1631 channel >= 1 && channel <= 14) {
1632 static const int freq_list[] = {
1633 2412, 2417, 2422, 2427, 2432, 2437, 2442,
1634 2447, 2452, 2457, 2462, 2467, 2472, 2484
1636 /* IEEE 802.11g/b mode can receive packets from neighboring
1637 * channels, so map the channel into frequency. */
1638 bss->freq = freq_list[channel - 1];
1640 bss->timestamp = timestamp;
1641 bss->last_update = jiffies;
1642 bss->rssi = rx_status->ssi;
1643 bss->signal = rx_status->signal;
1644 bss->noise = rx_status->noise;
1647 ieee80211_rx_bss_put(dev, bss);
1651 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
1652 struct ieee80211_mgmt *mgmt,
1654 struct ieee80211_rx_status *rx_status)
1656 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
1660 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
1661 struct ieee80211_mgmt *mgmt,
1663 struct ieee80211_rx_status *rx_status)
1665 struct ieee80211_sub_if_data *sdata;
1666 struct ieee80211_if_sta *ifsta;
1668 struct ieee802_11_elems elems;
1670 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
1672 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1673 if (sdata->type != IEEE80211_IF_TYPE_STA)
1675 ifsta = &sdata->u.sta;
1677 if (!ifsta->associated ||
1678 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
1681 /* Process beacon from the current BSS */
1682 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1686 if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1687 &elems) == ParseFailed)
1690 if (elems.erp_info && elems.erp_info_len >= 1)
1691 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
1693 if (elems.wmm_param && ifsta->wmm_enabled) {
1694 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1695 elems.wmm_param_len);
1700 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
1701 struct ieee80211_if_sta *ifsta,
1702 struct ieee80211_mgmt *mgmt,
1704 struct ieee80211_rx_status *rx_status)
1706 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1707 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1709 struct sk_buff *skb;
1710 struct ieee80211_mgmt *resp;
1713 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
1714 ifsta->state != IEEE80211_IBSS_JOINED ||
1715 len < 24 + 2 || !ifsta->probe_resp)
1718 if (local->ops->tx_last_beacon)
1719 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
1723 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1724 printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID="
1725 MAC_FMT " (tx_last_beacon=%d)\n",
1726 dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da),
1727 MAC_ARG(mgmt->bssid), tx_last_beacon);
1728 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1730 if (!tx_last_beacon)
1733 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
1734 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1737 end = ((u8 *) mgmt) + len;
1738 pos = mgmt->u.probe_req.variable;
1739 if (pos[0] != WLAN_EID_SSID ||
1740 pos + 2 + pos[1] > end) {
1741 if (net_ratelimit()) {
1742 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
1743 "from " MAC_FMT "\n",
1744 dev->name, MAC_ARG(mgmt->sa));
1749 (pos[1] != ifsta->ssid_len ||
1750 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
1751 /* Ignore ProbeReq for foreign SSID */
1755 /* Reply with ProbeResp */
1756 skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC);
1760 resp = (struct ieee80211_mgmt *) skb->data;
1761 memcpy(resp->da, mgmt->sa, ETH_ALEN);
1762 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1763 printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n",
1764 dev->name, MAC_ARG(resp->da));
1765 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1766 ieee80211_sta_tx(dev, skb, 0);
1770 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
1771 struct ieee80211_rx_status *rx_status)
1773 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1774 struct ieee80211_sub_if_data *sdata;
1775 struct ieee80211_if_sta *ifsta;
1776 struct ieee80211_mgmt *mgmt;
1782 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1783 ifsta = &sdata->u.sta;
1785 mgmt = (struct ieee80211_mgmt *) skb->data;
1786 fc = le16_to_cpu(mgmt->frame_control);
1788 switch (fc & IEEE80211_FCTL_STYPE) {
1789 case IEEE80211_STYPE_PROBE_REQ:
1790 case IEEE80211_STYPE_PROBE_RESP:
1791 case IEEE80211_STYPE_BEACON:
1792 memcpy(skb->cb, rx_status, sizeof(*rx_status));
1793 case IEEE80211_STYPE_AUTH:
1794 case IEEE80211_STYPE_ASSOC_RESP:
1795 case IEEE80211_STYPE_REASSOC_RESP:
1796 case IEEE80211_STYPE_DEAUTH:
1797 case IEEE80211_STYPE_DISASSOC:
1798 skb_queue_tail(&ifsta->skb_queue, skb);
1799 queue_work(local->hw.workqueue, &ifsta->work);
1802 printk(KERN_DEBUG "%s: received unknown management frame - "
1803 "stype=%d\n", dev->name,
1804 (fc & IEEE80211_FCTL_STYPE) >> 4);
1813 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
1814 struct sk_buff *skb)
1816 struct ieee80211_rx_status *rx_status;
1817 struct ieee80211_sub_if_data *sdata;
1818 struct ieee80211_if_sta *ifsta;
1819 struct ieee80211_mgmt *mgmt;
1822 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1823 ifsta = &sdata->u.sta;
1825 rx_status = (struct ieee80211_rx_status *) skb->cb;
1826 mgmt = (struct ieee80211_mgmt *) skb->data;
1827 fc = le16_to_cpu(mgmt->frame_control);
1829 switch (fc & IEEE80211_FCTL_STYPE) {
1830 case IEEE80211_STYPE_PROBE_REQ:
1831 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
1834 case IEEE80211_STYPE_PROBE_RESP:
1835 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
1837 case IEEE80211_STYPE_BEACON:
1838 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
1840 case IEEE80211_STYPE_AUTH:
1841 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
1843 case IEEE80211_STYPE_ASSOC_RESP:
1844 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
1846 case IEEE80211_STYPE_REASSOC_RESP:
1847 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
1849 case IEEE80211_STYPE_DEAUTH:
1850 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
1852 case IEEE80211_STYPE_DISASSOC:
1853 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
1861 void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
1862 struct ieee80211_rx_status *rx_status)
1864 struct ieee80211_mgmt *mgmt;
1867 if (skb->len < 24) {
1872 mgmt = (struct ieee80211_mgmt *) skb->data;
1873 fc = le16_to_cpu(mgmt->frame_control);
1875 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1876 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
1877 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
1878 skb->len, rx_status);
1879 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
1880 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
1889 static int ieee80211_sta_active_ibss(struct net_device *dev)
1891 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1893 struct sta_info *sta;
1895 read_lock_bh(&local->sta_lock);
1896 list_for_each_entry(sta, &local->sta_list, list) {
1897 if (sta->dev == dev &&
1898 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
1904 read_unlock_bh(&local->sta_lock);
1910 static void ieee80211_sta_expire(struct net_device *dev)
1912 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1913 struct sta_info *sta, *tmp;
1914 LIST_HEAD(tmp_list);
1916 write_lock_bh(&local->sta_lock);
1917 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
1918 if (time_after(jiffies, sta->last_rx +
1919 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
1920 printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT
1921 "\n", dev->name, MAC_ARG(sta->addr));
1922 __sta_info_get(sta);
1923 sta_info_remove(sta);
1924 list_add(&sta->list, &tmp_list);
1926 write_unlock_bh(&local->sta_lock);
1928 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
1935 static void ieee80211_sta_merge_ibss(struct net_device *dev,
1936 struct ieee80211_if_sta *ifsta)
1938 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
1940 ieee80211_sta_expire(dev);
1941 if (ieee80211_sta_active_ibss(dev))
1944 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
1945 "IBSS networks with same SSID (merge)\n", dev->name);
1946 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
1950 void ieee80211_sta_timer(unsigned long data)
1952 struct ieee80211_sub_if_data *sdata =
1953 (struct ieee80211_sub_if_data *) data;
1954 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1955 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
1957 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1958 queue_work(local->hw.workqueue, &ifsta->work);
1962 void ieee80211_sta_work(struct work_struct *work)
1964 struct ieee80211_sub_if_data *sdata =
1965 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
1966 struct net_device *dev = sdata->dev;
1967 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1968 struct ieee80211_if_sta *ifsta;
1969 struct sk_buff *skb;
1971 if (!netif_running(dev))
1974 if (local->sta_scanning)
1977 if (sdata->type != IEEE80211_IF_TYPE_STA &&
1978 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1979 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
1980 "(type=%d)\n", dev->name, sdata->type);
1983 ifsta = &sdata->u.sta;
1985 while ((skb = skb_dequeue(&ifsta->skb_queue)))
1986 ieee80211_sta_rx_queued_mgmt(dev, skb);
1988 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1989 ifsta->state != IEEE80211_ASSOCIATE &&
1990 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
1991 ieee80211_sta_start_scan(dev, NULL, 0);
1995 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
1996 if (ieee80211_sta_config_auth(dev, ifsta))
1998 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
1999 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2002 switch (ifsta->state) {
2003 case IEEE80211_DISABLED:
2005 case IEEE80211_AUTHENTICATE:
2006 ieee80211_authenticate(dev, ifsta);
2008 case IEEE80211_ASSOCIATE:
2009 ieee80211_associate(dev, ifsta);
2011 case IEEE80211_ASSOCIATED:
2012 ieee80211_associated(dev, ifsta);
2014 case IEEE80211_IBSS_SEARCH:
2015 ieee80211_sta_find_ibss(dev, ifsta);
2017 case IEEE80211_IBSS_JOINED:
2018 ieee80211_sta_merge_ibss(dev, ifsta);
2021 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2026 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2027 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2028 "mixed-cell disabled - disassociate\n", dev->name);
2030 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2031 ieee80211_set_disassoc(dev, ifsta, 0);
2036 static void ieee80211_sta_reset_auth(struct net_device *dev,
2037 struct ieee80211_if_sta *ifsta)
2039 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2041 if (local->ops->reset_tsf) {
2042 /* Reset own TSF to allow time synchronization work. */
2043 local->ops->reset_tsf(local_to_hw(local));
2046 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2049 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2050 ifsta->auth_alg = WLAN_AUTH_OPEN;
2051 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2052 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2053 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2054 ifsta->auth_alg = WLAN_AUTH_LEAP;
2056 ifsta->auth_alg = WLAN_AUTH_OPEN;
2057 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2059 ifsta->auth_transaction = -1;
2060 ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0;
2061 netif_carrier_off(dev);
2065 void ieee80211_sta_req_auth(struct net_device *dev,
2066 struct ieee80211_if_sta *ifsta)
2068 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2069 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2071 if (sdata->type != IEEE80211_IF_TYPE_STA)
2074 if ((ifsta->bssid_set || ifsta->auto_bssid_sel) &&
2075 (ifsta->ssid_set || ifsta->auto_ssid_sel)) {
2076 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2077 queue_work(local->hw.workqueue, &ifsta->work);
2081 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2082 const char *ssid, int ssid_len)
2084 int tmp, hidden_ssid;
2086 if (!memcmp(ifsta->ssid, ssid, ssid_len))
2089 if (ifsta->auto_bssid_sel)
2095 if (ssid[tmp] != '\0') {
2101 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2104 if (ssid_len == 1 && ssid[0] == ' ')
2110 static int ieee80211_sta_config_auth(struct net_device *dev,
2111 struct ieee80211_if_sta *ifsta)
2113 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2114 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2115 struct ieee80211_sta_bss *bss, *selected = NULL;
2116 int top_rssi = 0, freq;
2118 if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
2119 !ifsta->auto_ssid_sel) {
2120 ifsta->state = IEEE80211_AUTHENTICATE;
2121 ieee80211_sta_reset_auth(dev, ifsta);
2125 spin_lock_bh(&local->sta_bss_lock);
2126 freq = local->oper_channel->freq;
2127 list_for_each_entry(bss, &local->sta_bss_list, list) {
2128 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2131 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2132 !!sdata->default_key)
2135 if (!ifsta->auto_channel_sel && bss->freq != freq)
2138 if (!ifsta->auto_bssid_sel &&
2139 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2142 if (!ifsta->auto_ssid_sel &&
2143 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2146 if (!selected || top_rssi < bss->rssi) {
2148 top_rssi = bss->rssi;
2152 atomic_inc(&selected->users);
2153 spin_unlock_bh(&local->sta_bss_lock);
2156 ieee80211_set_channel(local, -1, selected->freq);
2157 if (!ifsta->ssid_set)
2158 ieee80211_sta_set_ssid(dev, selected->ssid,
2159 selected->ssid_len);
2160 ieee80211_sta_set_bssid(dev, selected->bssid);
2161 ieee80211_rx_bss_put(dev, selected);
2162 ifsta->state = IEEE80211_AUTHENTICATE;
2163 ieee80211_sta_reset_auth(dev, ifsta);
2166 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2167 if (ifsta->auto_ssid_sel)
2168 ieee80211_sta_start_scan(dev, NULL, 0);
2170 ieee80211_sta_start_scan(dev, ifsta->ssid,
2172 ifsta->state = IEEE80211_AUTHENTICATE;
2173 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2175 ifsta->state = IEEE80211_DISABLED;
2180 static int ieee80211_sta_join_ibss(struct net_device *dev,
2181 struct ieee80211_if_sta *ifsta,
2182 struct ieee80211_sta_bss *bss)
2184 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2185 int res, rates, i, j;
2186 struct sk_buff *skb;
2187 struct ieee80211_mgmt *mgmt;
2188 struct ieee80211_tx_control control;
2189 struct ieee80211_rate *rate;
2190 struct ieee80211_hw_mode *mode;
2191 struct rate_control_extra extra;
2193 struct ieee80211_sub_if_data *sdata;
2195 /* Remove possible STA entries from other IBSS networks. */
2196 sta_info_flush(local, NULL);
2198 if (local->ops->reset_tsf) {
2199 /* Reset own TSF to allow time synchronization work. */
2200 local->ops->reset_tsf(local_to_hw(local));
2202 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2203 res = ieee80211_if_config(dev);
2207 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2209 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2210 sdata->drop_unencrypted = bss->capability &
2211 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2213 res = ieee80211_set_channel(local, -1, bss->freq);
2215 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2216 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2217 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2218 local->hw.conf.freq);
2222 /* Set beacon template based on scan results */
2223 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2228 skb_reserve(skb, local->hw.extra_tx_headroom);
2230 mgmt = (struct ieee80211_mgmt *)
2231 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2232 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2233 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2234 IEEE80211_STYPE_BEACON);
2235 memset(mgmt->da, 0xff, ETH_ALEN);
2236 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2237 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2238 mgmt->u.beacon.beacon_int =
2239 cpu_to_le16(local->hw.conf.beacon_int);
2240 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2242 pos = skb_put(skb, 2 + ifsta->ssid_len);
2243 *pos++ = WLAN_EID_SSID;
2244 *pos++ = ifsta->ssid_len;
2245 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2247 rates = bss->supp_rates_len;
2250 pos = skb_put(skb, 2 + rates);
2251 *pos++ = WLAN_EID_SUPP_RATES;
2253 memcpy(pos, bss->supp_rates, rates);
2255 pos = skb_put(skb, 2 + 1);
2256 *pos++ = WLAN_EID_DS_PARAMS;
2258 *pos++ = bss->channel;
2260 pos = skb_put(skb, 2 + 2);
2261 *pos++ = WLAN_EID_IBSS_PARAMS;
2263 /* FIX: set ATIM window based on scan results */
2267 if (bss->supp_rates_len > 8) {
2268 rates = bss->supp_rates_len - 8;
2269 pos = skb_put(skb, 2 + rates);
2270 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2272 memcpy(pos, &bss->supp_rates[8], rates);
2275 memset(&control, 0, sizeof(control));
2276 memset(&extra, 0, sizeof(extra));
2277 extra.mode = local->oper_hw_mode;
2278 rate = rate_control_get_rate(local, dev, skb, &extra);
2280 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2281 "for IBSS beacon\n", dev->name);
2284 control.tx_rate = (local->short_preamble &&
2285 (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2286 rate->val2 : rate->val;
2287 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2288 control.power_level = local->hw.conf.power_level;
2289 control.flags |= IEEE80211_TXCTL_NO_ACK;
2290 control.retry_limit = 1;
2292 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2293 if (ifsta->probe_resp) {
2294 mgmt = (struct ieee80211_mgmt *)
2295 ifsta->probe_resp->data;
2296 mgmt->frame_control =
2297 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2298 IEEE80211_STYPE_PROBE_RESP);
2300 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2301 "template for IBSS\n", dev->name);
2304 if (local->ops->beacon_update &&
2305 local->ops->beacon_update(local_to_hw(local),
2306 skb, &control) == 0) {
2307 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2308 "template based on scan results\n", dev->name);
2313 mode = local->oper_hw_mode;
2314 for (i = 0; i < bss->supp_rates_len; i++) {
2315 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2316 if (mode->mode == MODE_ATHEROS_TURBO)
2318 for (j = 0; j < mode->num_rates; j++)
2319 if (mode->rates[j].rate == bitrate)
2322 ifsta->supp_rates_bits = rates;
2326 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2327 "template\n", dev->name);
2331 ifsta->state = IEEE80211_IBSS_JOINED;
2332 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2334 ieee80211_rx_bss_put(dev, bss);
2340 static int ieee80211_sta_create_ibss(struct net_device *dev,
2341 struct ieee80211_if_sta *ifsta)
2343 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2344 struct ieee80211_sta_bss *bss;
2345 struct ieee80211_sub_if_data *sdata;
2346 struct ieee80211_hw_mode *mode;
2347 u8 bssid[ETH_ALEN], *pos;
2351 /* Easier testing, use fixed BSSID. */
2352 memset(bssid, 0xfe, ETH_ALEN);
2354 /* Generate random, not broadcast, locally administered BSSID. Mix in
2355 * own MAC address to make sure that devices that do not have proper
2356 * random number generator get different BSSID. */
2357 get_random_bytes(bssid, ETH_ALEN);
2358 for (i = 0; i < ETH_ALEN; i++)
2359 bssid[i] ^= dev->dev_addr[i];
2364 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n",
2365 dev->name, MAC_ARG(bssid));
2367 bss = ieee80211_rx_bss_add(dev, bssid);
2371 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2372 mode = local->oper_hw_mode;
2374 if (local->hw.conf.beacon_int == 0)
2375 local->hw.conf.beacon_int = 100;
2376 bss->beacon_int = local->hw.conf.beacon_int;
2377 bss->hw_mode = local->hw.conf.phymode;
2378 bss->channel = local->hw.conf.channel;
2379 bss->freq = local->hw.conf.freq;
2380 bss->last_update = jiffies;
2381 bss->capability = WLAN_CAPABILITY_IBSS;
2382 if (sdata->default_key) {
2383 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2385 sdata->drop_unencrypted = 0;
2386 bss->supp_rates_len = mode->num_rates;
2387 pos = bss->supp_rates;
2388 for (i = 0; i < mode->num_rates; i++) {
2389 int rate = mode->rates[i].rate;
2390 if (mode->mode == MODE_ATHEROS_TURBO)
2392 *pos++ = (u8) (rate / 5);
2395 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2399 static int ieee80211_sta_find_ibss(struct net_device *dev,
2400 struct ieee80211_if_sta *ifsta)
2402 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2403 struct ieee80211_sta_bss *bss;
2408 if (ifsta->ssid_len == 0)
2411 active_ibss = ieee80211_sta_active_ibss(dev);
2412 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2413 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2414 dev->name, active_ibss);
2415 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2416 spin_lock_bh(&local->sta_bss_lock);
2417 list_for_each_entry(bss, &local->sta_bss_list, list) {
2418 if (ifsta->ssid_len != bss->ssid_len ||
2419 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2420 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2422 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2423 printk(KERN_DEBUG " bssid=" MAC_FMT " found\n",
2424 MAC_ARG(bss->bssid));
2425 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2426 memcpy(bssid, bss->bssid, ETH_ALEN);
2428 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2431 spin_unlock_bh(&local->sta_bss_lock);
2433 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2434 printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current "
2435 MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid));
2436 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2437 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2438 (bss = ieee80211_rx_bss_get(dev, bssid))) {
2439 printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT
2440 " based on configured SSID\n",
2441 dev->name, MAC_ARG(bssid));
2442 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2444 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2445 printk(KERN_DEBUG " did not try to join ibss\n");
2446 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2448 /* Selected IBSS not found in current scan results - try to scan */
2449 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2450 !ieee80211_sta_active_ibss(dev)) {
2451 mod_timer(&ifsta->timer, jiffies +
2452 IEEE80211_IBSS_MERGE_INTERVAL);
2453 } else if (time_after(jiffies, local->last_scan_completed +
2454 IEEE80211_SCAN_INTERVAL)) {
2455 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2456 "join\n", dev->name);
2457 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2459 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2460 int interval = IEEE80211_SCAN_INTERVAL;
2462 if (time_after(jiffies, ifsta->ibss_join_req +
2463 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2464 if (ifsta->create_ibss &&
2465 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2466 return ieee80211_sta_create_ibss(dev, ifsta);
2467 if (ifsta->create_ibss) {
2468 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2469 " configured channel %d (%d MHz)\n",
2470 dev->name, local->hw.conf.channel,
2471 local->hw.conf.freq);
2474 /* No IBSS found - decrease scan interval and continue
2476 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2479 ifsta->state = IEEE80211_IBSS_SEARCH;
2480 mod_timer(&ifsta->timer, jiffies + interval);
2488 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2490 struct ieee80211_sub_if_data *sdata;
2491 struct ieee80211_if_sta *ifsta;
2492 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2494 if (len > IEEE80211_MAX_SSID_LEN)
2497 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2499 if (local->ops->conf_tx) {
2500 struct ieee80211_tx_queue_params qparam;
2503 memset(&qparam, 0, sizeof(qparam));
2504 /* TODO: are these ok defaults for all hw_modes? */
2507 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2508 qparam.cw_max = 1023;
2509 qparam.burst_time = 0;
2510 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2512 local->ops->conf_tx(local_to_hw(local),
2513 i + IEEE80211_TX_QUEUE_DATA0,
2516 /* IBSS uses different parameters for Beacon sending */
2520 local->ops->conf_tx(local_to_hw(local),
2521 IEEE80211_TX_QUEUE_BEACON, &qparam);
2524 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2525 ifsta = &sdata->u.sta;
2527 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
2528 ifsta->prev_bssid_set = 0;
2529 memcpy(ifsta->ssid, ssid, len);
2530 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2531 ifsta->ssid_len = len;
2533 ifsta->ssid_set = len ? 1 : 0;
2534 if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) {
2535 ifsta->ibss_join_req = jiffies;
2536 ifsta->state = IEEE80211_IBSS_SEARCH;
2537 return ieee80211_sta_find_ibss(dev, ifsta);
2543 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
2545 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2546 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2547 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
2548 *len = ifsta->ssid_len;
2553 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
2555 struct ieee80211_sub_if_data *sdata;
2556 struct ieee80211_if_sta *ifsta;
2559 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2560 ifsta = &sdata->u.sta;
2562 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
2563 memcpy(ifsta->bssid, bssid, ETH_ALEN);
2564 res = ieee80211_if_config(dev);
2566 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
2567 "the low-level driver\n", dev->name);
2572 if (!is_valid_ether_addr(bssid))
2573 ifsta->bssid_set = 0;
2575 ifsta->bssid_set = 1;
2580 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
2581 struct ieee80211_sub_if_data *sdata,
2584 struct sk_buff *skb;
2585 struct ieee80211_hdr *nullfunc;
2588 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
2590 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
2591 "frame\n", sdata->dev->name);
2594 skb_reserve(skb, local->hw.extra_tx_headroom);
2596 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
2597 memset(nullfunc, 0, 24);
2598 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
2599 IEEE80211_FCTL_TODS;
2601 fc |= IEEE80211_FCTL_PM;
2602 nullfunc->frame_control = cpu_to_le16(fc);
2603 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
2604 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
2605 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
2607 ieee80211_sta_tx(sdata->dev, skb, 0);
2611 void ieee80211_scan_completed(struct ieee80211_hw *hw)
2613 struct ieee80211_local *local = hw_to_local(hw);
2614 struct net_device *dev = local->scan_dev;
2615 struct ieee80211_sub_if_data *sdata;
2616 union iwreq_data wrqu;
2618 local->last_scan_completed = jiffies;
2620 local->sta_scanning = 0;
2622 if (ieee80211_hw_config(local))
2623 printk(KERN_DEBUG "%s: failed to restore operational"
2624 "channel after scan\n", dev->name);
2626 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2627 ieee80211_if_config(dev))
2628 printk(KERN_DEBUG "%s: failed to restore operational"
2629 "BSSID after scan\n", dev->name);
2631 memset(&wrqu, 0, sizeof(wrqu));
2632 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
2634 read_lock(&local->sub_if_lock);
2635 list_for_each_entry(sdata, &local->sub_if_list, list) {
2637 /* No need to wake the master device. */
2638 if (sdata->dev == local->mdev)
2641 if (sdata->type == IEEE80211_IF_TYPE_STA) {
2642 if (sdata->u.sta.associated)
2643 ieee80211_send_nullfunc(local, sdata, 0);
2644 ieee80211_sta_timer((unsigned long)sdata);
2647 netif_wake_queue(sdata->dev);
2649 read_unlock(&local->sub_if_lock);
2651 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2652 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
2653 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2654 if (!ifsta->bssid_set ||
2655 (!ifsta->state == IEEE80211_IBSS_JOINED &&
2656 !ieee80211_sta_active_ibss(dev)))
2657 ieee80211_sta_find_ibss(dev, ifsta);
2660 EXPORT_SYMBOL(ieee80211_scan_completed);
2662 void ieee80211_sta_scan_work(struct work_struct *work)
2664 struct ieee80211_local *local =
2665 container_of(work, struct ieee80211_local, scan_work.work);
2666 struct net_device *dev = local->scan_dev;
2667 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2668 struct ieee80211_hw_mode *mode;
2669 struct ieee80211_channel *chan;
2671 unsigned long next_delay = 0;
2673 if (!local->sta_scanning)
2676 switch (local->scan_state) {
2677 case SCAN_SET_CHANNEL:
2678 mode = local->scan_hw_mode;
2679 if (local->scan_hw_mode->list.next == &local->modes_list &&
2680 local->scan_channel_idx >= mode->num_channels) {
2681 ieee80211_scan_completed(local_to_hw(local));
2684 skip = !(local->enabled_modes & (1 << mode->mode));
2685 chan = &mode->channels[local->scan_channel_idx];
2686 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
2687 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2688 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
2689 (local->hw_modes & local->enabled_modes &
2690 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
2695 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
2696 dev->name, chan->chan, chan->freq);
2699 local->scan_channel = chan;
2700 if (ieee80211_hw_config(local)) {
2701 printk(KERN_DEBUG "%s: failed to set channel "
2702 "%d (%d MHz) for scan\n", dev->name,
2703 chan->chan, chan->freq);
2708 local->scan_channel_idx++;
2709 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
2710 if (local->scan_hw_mode->list.next != &local->modes_list) {
2711 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
2712 struct ieee80211_hw_mode,
2714 local->scan_channel_idx = 0;
2721 next_delay = IEEE80211_PROBE_DELAY +
2722 usecs_to_jiffies(local->hw.channel_change_time);
2723 local->scan_state = SCAN_SEND_PROBE;
2725 case SCAN_SEND_PROBE:
2726 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
2727 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
2728 local->scan_ssid_len);
2729 next_delay = IEEE80211_CHANNEL_TIME;
2731 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
2732 local->scan_state = SCAN_SET_CHANNEL;
2736 if (local->sta_scanning)
2737 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2742 static int ieee80211_sta_start_scan(struct net_device *dev,
2743 u8 *ssid, size_t ssid_len)
2745 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2746 struct ieee80211_sub_if_data *sdata;
2748 if (ssid_len > IEEE80211_MAX_SSID_LEN)
2751 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
2752 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2755 * ScanType: ACTIVE, PASSIVE
2756 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2757 * a Probe frame during active scanning
2759 * MinChannelTime (>= ProbeDelay), in TU
2760 * MaxChannelTime: (>= MinChannelTime), in TU
2763 /* MLME-SCAN.confirm
2765 * ResultCode: SUCCESS, INVALID_PARAMETERS
2768 if (local->sta_scanning) {
2769 if (local->scan_dev == dev)
2774 if (local->ops->hw_scan) {
2775 int rc = local->ops->hw_scan(local_to_hw(local),
2778 local->sta_scanning = 1;
2779 local->scan_dev = dev;
2784 local->sta_scanning = 1;
2786 read_lock(&local->sub_if_lock);
2787 list_for_each_entry(sdata, &local->sub_if_list, list) {
2789 /* Don't stop the master interface, otherwise we can't transmit
2791 if (sdata->dev == local->mdev)
2794 netif_stop_queue(sdata->dev);
2795 if (sdata->type == IEEE80211_IF_TYPE_STA &&
2796 sdata->u.sta.associated)
2797 ieee80211_send_nullfunc(local, sdata, 1);
2799 read_unlock(&local->sub_if_lock);
2802 local->scan_ssid_len = ssid_len;
2803 memcpy(local->scan_ssid, ssid, ssid_len);
2805 local->scan_ssid_len = 0;
2806 local->scan_state = SCAN_SET_CHANNEL;
2807 local->scan_hw_mode = list_entry(local->modes_list.next,
2808 struct ieee80211_hw_mode,
2810 local->scan_channel_idx = 0;
2811 local->scan_dev = dev;
2813 if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) &&
2814 ieee80211_if_config(dev))
2815 printk(KERN_DEBUG "%s: failed to set BSSID for scan\n",
2818 /* TODO: start scan as soon as all nullfunc frames are ACKed */
2819 queue_delayed_work(local->hw.workqueue, &local->scan_work,
2820 IEEE80211_CHANNEL_TIME);
2826 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
2828 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2829 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2830 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2832 if (sdata->type != IEEE80211_IF_TYPE_STA)
2833 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
2835 if (local->sta_scanning) {
2836 if (local->scan_dev == dev)
2841 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
2842 queue_work(local->hw.workqueue, &ifsta->work);
2847 ieee80211_sta_scan_result(struct net_device *dev,
2848 struct ieee80211_sta_bss *bss,
2849 char *current_ev, char *end_buf)
2851 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2852 struct iw_event iwe;
2854 if (time_after(jiffies,
2855 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
2858 if (!(local->enabled_modes & (1 << bss->hw_mode)))
2861 if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY &&
2862 !bss->wpa_ie && !bss->rsn_ie)
2865 if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID &&
2866 (local->scan_ssid_len != bss->ssid_len ||
2867 memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0))
2870 memset(&iwe, 0, sizeof(iwe));
2871 iwe.cmd = SIOCGIWAP;
2872 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2873 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2874 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2877 memset(&iwe, 0, sizeof(iwe));
2878 iwe.cmd = SIOCGIWESSID;
2879 iwe.u.data.length = bss->ssid_len;
2880 iwe.u.data.flags = 1;
2881 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2884 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
2885 memset(&iwe, 0, sizeof(iwe));
2886 iwe.cmd = SIOCGIWMODE;
2887 if (bss->capability & WLAN_CAPABILITY_ESS)
2888 iwe.u.mode = IW_MODE_MASTER;
2890 iwe.u.mode = IW_MODE_ADHOC;
2891 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2895 memset(&iwe, 0, sizeof(iwe));
2896 iwe.cmd = SIOCGIWFREQ;
2897 iwe.u.freq.m = bss->channel;
2899 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2901 iwe.u.freq.m = bss->freq * 100000;
2903 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2906 memset(&iwe, 0, sizeof(iwe));
2908 iwe.u.qual.qual = bss->signal;
2909 iwe.u.qual.level = bss->rssi;
2910 iwe.u.qual.noise = bss->noise;
2911 iwe.u.qual.updated = local->wstats_flags;
2912 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2915 memset(&iwe, 0, sizeof(iwe));
2916 iwe.cmd = SIOCGIWENCODE;
2917 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
2918 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2920 iwe.u.data.flags = IW_ENCODE_DISABLED;
2921 iwe.u.data.length = 0;
2922 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
2924 if (bss && bss->wpa_ie) {
2925 memset(&iwe, 0, sizeof(iwe));
2926 iwe.cmd = IWEVGENIE;
2927 iwe.u.data.length = bss->wpa_ie_len;
2928 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2932 if (bss && bss->rsn_ie) {
2933 memset(&iwe, 0, sizeof(iwe));
2934 iwe.cmd = IWEVGENIE;
2935 iwe.u.data.length = bss->rsn_ie_len;
2936 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2940 if (bss && bss->supp_rates_len > 0) {
2941 /* display all supported rates in readable format */
2942 char *p = current_ev + IW_EV_LCP_LEN;
2945 memset(&iwe, 0, sizeof(iwe));
2946 iwe.cmd = SIOCGIWRATE;
2947 /* Those two flags are ignored... */
2948 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
2950 for (i = 0; i < bss->supp_rates_len; i++) {
2951 iwe.u.bitrate.value = ((bss->supp_rates[i] &
2953 p = iwe_stream_add_value(current_ev, p,
2954 end_buf, &iwe, IW_EV_PARAM_LEN);
2961 buf = kmalloc(30, GFP_ATOMIC);
2963 memset(&iwe, 0, sizeof(iwe));
2964 iwe.cmd = IWEVCUSTOM;
2965 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
2966 iwe.u.data.length = strlen(buf);
2967 current_ev = iwe_stream_add_point(current_ev, end_buf,
2976 if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO))
2979 buf = kmalloc(100, GFP_ATOMIC);
2983 memset(&iwe, 0, sizeof(iwe));
2984 iwe.cmd = IWEVCUSTOM;
2985 sprintf(buf, "bcn_int=%d", bss->beacon_int);
2986 iwe.u.data.length = strlen(buf);
2987 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
2990 memset(&iwe, 0, sizeof(iwe));
2991 iwe.cmd = IWEVCUSTOM;
2992 sprintf(buf, "capab=0x%04x", bss->capability);
2993 iwe.u.data.length = strlen(buf);
2994 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3005 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3007 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3008 char *current_ev = buf;
3009 char *end_buf = buf + len;
3010 struct ieee80211_sta_bss *bss;
3012 spin_lock_bh(&local->sta_bss_lock);
3013 list_for_each_entry(bss, &local->sta_bss_list, list) {
3014 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3015 spin_unlock_bh(&local->sta_bss_lock);
3018 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3021 spin_unlock_bh(&local->sta_bss_lock);
3022 return current_ev - buf;
3026 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3028 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3029 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3030 kfree(ifsta->extra_ie);
3032 ifsta->extra_ie = NULL;
3033 ifsta->extra_ie_len = 0;
3036 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3037 if (!ifsta->extra_ie) {
3038 ifsta->extra_ie_len = 0;
3041 memcpy(ifsta->extra_ie, ie, len);
3042 ifsta->extra_ie_len = len;
3047 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3048 struct sk_buff *skb, u8 *bssid,
3051 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3052 struct sta_info *sta;
3053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3055 /* TODO: Could consider removing the least recently used entry and
3056 * allow new one to be added. */
3057 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3058 if (net_ratelimit()) {
3059 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3060 "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr));
3065 printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n",
3066 local->mdev->name, MAC_ARG(addr), dev->name);
3068 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3072 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3074 rate_control_rate_init(sta, local);
3076 return sta; /* caller will call sta_info_put() */
3080 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3082 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3083 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3085 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3088 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3089 sdata->type != IEEE80211_IF_TYPE_IBSS)
3092 ieee80211_send_deauth(dev, ifsta, reason);
3093 ieee80211_set_disassoc(dev, ifsta, 1);
3098 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3100 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3101 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3103 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3106 if (sdata->type != IEEE80211_IF_TYPE_STA)
3109 if (!ifsta->associated)
3112 ieee80211_send_disassoc(dev, ifsta, reason);
3113 ieee80211_set_disassoc(dev, ifsta, 0);