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 /* mgmt header + 1 byte action code */
61 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
63 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
64 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
65 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
66 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
67 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
69 /* next values represent the buffer size for A-MPDU frame.
70 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
71 #define IEEE80211_MIN_AMPDU_BUF 0x8
72 #define IEEE80211_MAX_AMPDU_BUF 0x40
74 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
75 u8 *ssid, size_t ssid_len);
76 static struct ieee80211_sta_bss *
77 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
78 u8 *ssid, u8 ssid_len);
79 static void ieee80211_rx_bss_put(struct net_device *dev,
80 struct ieee80211_sta_bss *bss);
81 static int ieee80211_sta_find_ibss(struct net_device *dev,
82 struct ieee80211_if_sta *ifsta);
83 static int ieee80211_sta_wep_configured(struct net_device *dev);
84 static int ieee80211_sta_start_scan(struct net_device *dev,
85 u8 *ssid, size_t ssid_len);
86 static int ieee80211_sta_config_auth(struct net_device *dev,
87 struct ieee80211_if_sta *ifsta);
90 /* Parsed Information Elements */
91 struct ieee802_11_elems {
109 /* length of them, respectively */
121 u8 ext_supp_rates_len;
128 static void ieee802_11_parse_elems(u8 *start, size_t len,
129 struct ieee802_11_elems *elems)
134 memset(elems, 0, sizeof(*elems));
149 elems->ssid_len = elen;
151 case WLAN_EID_SUPP_RATES:
152 elems->supp_rates = pos;
153 elems->supp_rates_len = elen;
155 case WLAN_EID_FH_PARAMS:
156 elems->fh_params = pos;
157 elems->fh_params_len = elen;
159 case WLAN_EID_DS_PARAMS:
160 elems->ds_params = pos;
161 elems->ds_params_len = elen;
163 case WLAN_EID_CF_PARAMS:
164 elems->cf_params = pos;
165 elems->cf_params_len = elen;
169 elems->tim_len = elen;
171 case WLAN_EID_IBSS_PARAMS:
172 elems->ibss_params = pos;
173 elems->ibss_params_len = elen;
175 case WLAN_EID_CHALLENGE:
176 elems->challenge = pos;
177 elems->challenge_len = elen;
180 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
182 /* Microsoft OUI (00:50:F2) */
184 /* OUI Type 1 - WPA IE */
186 elems->wpa_len = elen;
187 } else if (elen >= 5 && pos[3] == 2) {
189 elems->wmm_info = pos;
190 elems->wmm_info_len = elen;
191 } else if (pos[4] == 1) {
192 elems->wmm_param = pos;
193 elems->wmm_param_len = elen;
200 elems->rsn_len = elen;
202 case WLAN_EID_ERP_INFO:
203 elems->erp_info = pos;
204 elems->erp_info_len = elen;
206 case WLAN_EID_EXT_SUPP_RATES:
207 elems->ext_supp_rates = pos;
208 elems->ext_supp_rates_len = elen;
210 case WLAN_EID_HT_CAPABILITY:
211 elems->ht_cap_elem = pos;
212 elems->ht_cap_elem_len = elen;
214 case WLAN_EID_HT_EXTRA_INFO:
215 elems->ht_info_elem = pos;
216 elems->ht_info_elem_len = elen;
228 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 u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
319 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
320 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
321 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
322 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
323 DECLARE_MAC_BUF(mac);
326 if (use_protection != bss_conf->use_cts_prot) {
327 if (net_ratelimit()) {
328 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
331 use_protection ? "enabled" : "disabled",
332 print_mac(mac, ifsta->bssid));
334 bss_conf->use_cts_prot = use_protection;
335 changed |= BSS_CHANGED_ERP_CTS_PROT;
338 if (preamble_mode != bss_conf->use_short_preamble) {
339 if (net_ratelimit()) {
340 printk(KERN_DEBUG "%s: switched to %s barker preamble"
343 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
345 print_mac(mac, ifsta->bssid));
347 bss_conf->use_short_preamble = preamble_mode;
348 changed |= BSS_CHANGED_ERP_PREAMBLE;
354 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
355 struct ieee80211_ht_info *ht_info)
361 memset(ht_info, 0, sizeof(*ht_info));
364 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
366 ht_info->ht_supported = 1;
367 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
368 ht_info->ampdu_factor =
369 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
370 ht_info->ampdu_density =
371 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
372 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
374 ht_info->ht_supported = 0;
379 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
380 struct ieee80211_ht_addt_info *ht_add_info_ie,
381 struct ieee80211_ht_bss_info *bss_info)
383 if (bss_info == NULL)
386 memset(bss_info, 0, sizeof(*bss_info));
388 if (ht_add_info_ie) {
390 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
392 bss_info->primary_channel = ht_add_info_ie->control_chan;
393 bss_info->bss_cap = ht_add_info_ie->ht_param;
394 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
400 static void ieee80211_sta_send_associnfo(struct net_device *dev,
401 struct ieee80211_if_sta *ifsta)
406 union iwreq_data wrqu;
408 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
411 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
412 ifsta->assocresp_ies_len), GFP_KERNEL);
416 len = sprintf(buf, "ASSOCINFO(");
417 if (ifsta->assocreq_ies) {
418 len += sprintf(buf + len, "ReqIEs=");
419 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
420 len += sprintf(buf + len, "%02x",
421 ifsta->assocreq_ies[i]);
424 if (ifsta->assocresp_ies) {
425 if (ifsta->assocreq_ies)
426 len += sprintf(buf + len, " ");
427 len += sprintf(buf + len, "RespIEs=");
428 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
429 len += sprintf(buf + len, "%02x",
430 ifsta->assocresp_ies[i]);
433 len += sprintf(buf + len, ")");
435 if (len > IW_CUSTOM_MAX) {
436 len = sprintf(buf, "ASSOCRESPIE=");
437 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
438 len += sprintf(buf + len, "%02x",
439 ifsta->assocresp_ies[i]);
443 memset(&wrqu, 0, sizeof(wrqu));
444 wrqu.data.length = len;
445 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
451 static void ieee80211_set_associated(struct net_device *dev,
452 struct ieee80211_if_sta *ifsta,
455 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
456 struct ieee80211_local *local = sdata->local;
457 union iwreq_data wrqu;
458 u32 changed = BSS_CHANGED_ASSOC;
461 struct ieee80211_sta_bss *bss;
463 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
465 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
468 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
469 local->hw.conf.channel,
470 ifsta->ssid, ifsta->ssid_len);
472 if (bss->has_erp_value)
473 changed |= ieee80211_handle_erp_ie(
474 sdata, bss->erp_value);
475 ieee80211_rx_bss_put(dev, bss);
478 netif_carrier_on(dev);
479 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
480 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
481 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
482 ieee80211_sta_send_associnfo(dev, ifsta);
484 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
486 netif_carrier_off(dev);
487 ieee80211_reset_erp_info(dev);
488 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
490 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
491 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
492 ifsta->last_probe = jiffies;
493 ieee80211_led_assoc(local, assoc);
495 sdata->bss_conf.assoc = assoc;
496 ieee80211_bss_info_change_notify(sdata, changed);
499 static void ieee80211_set_disassoc(struct net_device *dev,
500 struct ieee80211_if_sta *ifsta, int deauth)
503 ifsta->auth_tries = 0;
504 ifsta->assoc_tries = 0;
505 ieee80211_set_associated(dev, ifsta, 0);
508 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
511 struct ieee80211_sub_if_data *sdata;
512 struct ieee80211_tx_packet_data *pkt_data;
514 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
515 skb->dev = sdata->local->mdev;
516 skb_set_mac_header(skb, 0);
517 skb_set_network_header(skb, 0);
518 skb_set_transport_header(skb, 0);
520 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
521 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
522 pkt_data->ifindex = sdata->dev->ifindex;
524 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
530 static void ieee80211_send_auth(struct net_device *dev,
531 struct ieee80211_if_sta *ifsta,
532 int transaction, u8 *extra, size_t extra_len,
535 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
537 struct ieee80211_mgmt *mgmt;
539 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
540 sizeof(*mgmt) + 6 + extra_len);
542 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
543 "frame\n", dev->name);
546 skb_reserve(skb, local->hw.extra_tx_headroom);
548 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
549 memset(mgmt, 0, 24 + 6);
550 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
551 IEEE80211_STYPE_AUTH);
553 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
554 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
555 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
556 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
557 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
558 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
559 ifsta->auth_transaction = transaction + 1;
560 mgmt->u.auth.status_code = cpu_to_le16(0);
562 memcpy(skb_put(skb, extra_len), extra, extra_len);
564 ieee80211_sta_tx(dev, skb, encrypt);
568 static void ieee80211_authenticate(struct net_device *dev,
569 struct ieee80211_if_sta *ifsta)
571 DECLARE_MAC_BUF(mac);
574 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
575 printk(KERN_DEBUG "%s: authentication with AP %s"
577 dev->name, print_mac(mac, ifsta->bssid));
578 ifsta->state = IEEE80211_DISABLED;
582 ifsta->state = IEEE80211_AUTHENTICATE;
583 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
584 dev->name, print_mac(mac, ifsta->bssid));
586 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
588 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
592 static void ieee80211_send_assoc(struct net_device *dev,
593 struct ieee80211_if_sta *ifsta)
595 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
596 struct ieee80211_hw_mode *mode;
598 struct ieee80211_mgmt *mgmt;
602 struct ieee80211_sta_bss *bss;
605 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
606 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
609 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
610 "frame\n", dev->name);
613 skb_reserve(skb, local->hw.extra_tx_headroom);
615 mode = local->oper_hw_mode;
616 capab = ifsta->capab;
617 if (mode->mode == MODE_IEEE80211G) {
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
619 WLAN_CAPABILITY_SHORT_PREAMBLE;
621 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
622 ifsta->ssid, ifsta->ssid_len);
624 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
625 capab |= WLAN_CAPABILITY_PRIVACY;
629 ieee80211_rx_bss_put(dev, bss);
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
634 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
635 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
636 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
638 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
640 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
641 IEEE80211_STYPE_REASSOC_REQ);
642 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
643 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
644 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
648 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
649 IEEE80211_STYPE_ASSOC_REQ);
650 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
651 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
655 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = ifsta->ssid_len;
658 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
660 len = mode->num_rates;
663 pos = skb_put(skb, len + 2);
664 *pos++ = WLAN_EID_SUPP_RATES;
666 for (i = 0; i < len; i++) {
667 int rate = mode->rates[i].rate;
668 *pos++ = (u8) (rate / 5);
671 if (mode->num_rates > len) {
672 pos = skb_put(skb, mode->num_rates - len + 2);
673 *pos++ = WLAN_EID_EXT_SUPP_RATES;
674 *pos++ = mode->num_rates - len;
675 for (i = len; i < mode->num_rates; i++) {
676 int rate = mode->rates[i].rate;
677 *pos++ = (u8) (rate / 5);
681 if (ifsta->extra_ie) {
682 pos = skb_put(skb, ifsta->extra_ie_len);
683 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
686 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
687 pos = skb_put(skb, 9);
688 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
689 *pos++ = 7; /* len */
690 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
693 *pos++ = 2; /* WME */
694 *pos++ = 0; /* WME info */
695 *pos++ = 1; /* WME ver */
698 /* wmm support is a must to HT */
699 if (wmm && mode->ht_info.ht_supported) {
700 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
701 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
702 *pos++ = WLAN_EID_HT_CAPABILITY;
703 *pos++ = sizeof(struct ieee80211_ht_cap);
704 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
705 memcpy(pos, &tmp, sizeof(u16));
707 *pos++ = (mode->ht_info.ampdu_factor |
708 (mode->ht_info.ampdu_density << 2));
709 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
712 kfree(ifsta->assocreq_ies);
713 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
714 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
715 if (ifsta->assocreq_ies)
716 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
718 ieee80211_sta_tx(dev, skb, 0);
722 static void ieee80211_send_deauth(struct net_device *dev,
723 struct ieee80211_if_sta *ifsta, u16 reason)
725 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
727 struct ieee80211_mgmt *mgmt;
729 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
731 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
732 "frame\n", dev->name);
735 skb_reserve(skb, local->hw.extra_tx_headroom);
737 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
739 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
740 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
741 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
742 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
743 IEEE80211_STYPE_DEAUTH);
745 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
747 ieee80211_sta_tx(dev, skb, 0);
751 static void ieee80211_send_disassoc(struct net_device *dev,
752 struct ieee80211_if_sta *ifsta, u16 reason)
754 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
756 struct ieee80211_mgmt *mgmt;
758 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
760 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
761 "frame\n", dev->name);
764 skb_reserve(skb, local->hw.extra_tx_headroom);
766 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
768 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
769 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
770 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
771 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
772 IEEE80211_STYPE_DISASSOC);
774 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
776 ieee80211_sta_tx(dev, skb, 0);
780 static int ieee80211_privacy_mismatch(struct net_device *dev,
781 struct ieee80211_if_sta *ifsta)
783 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
784 struct ieee80211_sta_bss *bss;
789 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
792 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
793 ifsta->ssid, ifsta->ssid_len);
797 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
798 wep_privacy = !!ieee80211_sta_wep_configured(dev);
799 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
801 ieee80211_rx_bss_put(dev, bss);
803 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
810 static void ieee80211_associate(struct net_device *dev,
811 struct ieee80211_if_sta *ifsta)
813 DECLARE_MAC_BUF(mac);
815 ifsta->assoc_tries++;
816 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
817 printk(KERN_DEBUG "%s: association with AP %s"
819 dev->name, print_mac(mac, ifsta->bssid));
820 ifsta->state = IEEE80211_DISABLED;
824 ifsta->state = IEEE80211_ASSOCIATE;
825 printk(KERN_DEBUG "%s: associate with AP %s\n",
826 dev->name, print_mac(mac, ifsta->bssid));
827 if (ieee80211_privacy_mismatch(dev, ifsta)) {
828 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
829 "mixed-cell disabled - abort association\n", dev->name);
830 ifsta->state = IEEE80211_DISABLED;
834 ieee80211_send_assoc(dev, ifsta);
836 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
840 static void ieee80211_associated(struct net_device *dev,
841 struct ieee80211_if_sta *ifsta)
843 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
844 struct sta_info *sta;
846 DECLARE_MAC_BUF(mac);
848 /* TODO: start monitoring current AP signal quality and number of
849 * missed beacons. Scan other channels every now and then and search
851 /* TODO: remove expired BSSes */
853 ifsta->state = IEEE80211_ASSOCIATED;
855 sta = sta_info_get(local, ifsta->bssid);
857 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
858 dev->name, print_mac(mac, ifsta->bssid));
862 if (time_after(jiffies,
863 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
864 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
865 printk(KERN_DEBUG "%s: No ProbeResp from "
866 "current AP %s - assume out of "
868 dev->name, print_mac(mac, ifsta->bssid));
872 ieee80211_send_probe_req(dev, ifsta->bssid,
874 local->scan_ssid_len);
875 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
877 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
878 if (time_after(jiffies, ifsta->last_probe +
879 IEEE80211_PROBE_INTERVAL)) {
880 ifsta->last_probe = jiffies;
881 ieee80211_send_probe_req(dev, ifsta->bssid,
889 ifsta->state = IEEE80211_DISABLED;
890 ieee80211_set_associated(dev, ifsta, 0);
892 mod_timer(&ifsta->timer, jiffies +
893 IEEE80211_MONITORING_INTERVAL);
898 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
899 u8 *ssid, size_t ssid_len)
901 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
902 struct ieee80211_hw_mode *mode;
904 struct ieee80211_mgmt *mgmt;
905 u8 *pos, *supp_rates, *esupp_rates = NULL;
908 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
910 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
911 "request\n", dev->name);
914 skb_reserve(skb, local->hw.extra_tx_headroom);
916 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
918 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
919 IEEE80211_STYPE_PROBE_REQ);
920 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
922 memcpy(mgmt->da, dst, ETH_ALEN);
923 memcpy(mgmt->bssid, dst, ETH_ALEN);
925 memset(mgmt->da, 0xff, ETH_ALEN);
926 memset(mgmt->bssid, 0xff, ETH_ALEN);
928 pos = skb_put(skb, 2 + ssid_len);
929 *pos++ = WLAN_EID_SSID;
931 memcpy(pos, ssid, ssid_len);
933 supp_rates = skb_put(skb, 2);
934 supp_rates[0] = WLAN_EID_SUPP_RATES;
936 mode = local->oper_hw_mode;
937 for (i = 0; i < mode->num_rates; i++) {
938 struct ieee80211_rate *rate = &mode->rates[i];
939 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
942 pos = skb_put(skb, 1);
944 } else if (supp_rates[1] == 8) {
945 esupp_rates = skb_put(skb, 3);
946 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
948 pos = &esupp_rates[2];
950 pos = skb_put(skb, 1);
953 *pos = rate->rate / 5;
956 ieee80211_sta_tx(dev, skb, 0);
960 static int ieee80211_sta_wep_configured(struct net_device *dev)
962 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
963 if (!sdata || !sdata->default_key ||
964 sdata->default_key->conf.alg != ALG_WEP)
970 static void ieee80211_auth_completed(struct net_device *dev,
971 struct ieee80211_if_sta *ifsta)
973 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
974 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
975 ieee80211_associate(dev, ifsta);
979 static void ieee80211_auth_challenge(struct net_device *dev,
980 struct ieee80211_if_sta *ifsta,
981 struct ieee80211_mgmt *mgmt,
985 struct ieee802_11_elems elems;
987 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
988 pos = mgmt->u.auth.variable;
989 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
990 if (!elems.challenge) {
991 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
992 "frame\n", dev->name);
995 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
996 elems.challenge_len + 2, 1);
999 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1000 u8 dialog_token, u16 status, u16 policy,
1001 u16 buf_size, u16 timeout)
1003 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1005 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1006 struct sk_buff *skb;
1007 struct ieee80211_mgmt *mgmt;
1010 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1011 sizeof(mgmt->u.action.u.addba_resp));
1013 printk(KERN_DEBUG "%s: failed to allocate buffer "
1014 "for addba resp frame\n", dev->name);
1018 skb_reserve(skb, local->hw.extra_tx_headroom);
1019 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1020 memset(mgmt, 0, 24);
1021 memcpy(mgmt->da, da, ETH_ALEN);
1022 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1023 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1024 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1026 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1027 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1028 IEEE80211_STYPE_ACTION);
1030 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1031 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1032 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1033 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1035 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1036 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1037 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1039 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1040 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1041 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1043 ieee80211_sta_tx(dev, skb, 0);
1048 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1049 struct ieee80211_mgmt *mgmt,
1052 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1053 struct ieee80211_hw *hw = &local->hw;
1054 struct ieee80211_conf *conf = &hw->conf;
1055 struct sta_info *sta;
1056 struct tid_ampdu_rx *tid_agg_rx;
1057 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1059 int ret = -EOPNOTSUPP;
1060 DECLARE_MAC_BUF(mac);
1062 sta = sta_info_get(local, mgmt->sa);
1066 /* extract session parameters from addba request frame */
1067 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1068 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1070 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1072 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1073 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1074 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1075 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1077 status = WLAN_STATUS_REQUEST_DECLINED;
1079 /* sanity check for incoming parameters:
1080 * check if configuration can support the BA policy
1081 * and if buffer size does not exceeds max value */
1082 if (((ba_policy != 1)
1083 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1084 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1085 status = WLAN_STATUS_INVALID_QOS_PARAM;
1086 #ifdef CONFIG_MAC80211_HT_DEBUG
1087 if (net_ratelimit())
1088 printk(KERN_DEBUG "Block Ack Req with bad params from "
1089 "%s on tid %u. policy %d, buffer size %d\n",
1090 print_mac(mac, mgmt->sa), tid, ba_policy,
1092 #endif /* CONFIG_MAC80211_HT_DEBUG */
1095 /* determine default buffer size */
1096 if (buf_size == 0) {
1097 struct ieee80211_hw_mode *mode = conf->mode;
1098 buf_size = IEEE80211_MIN_AMPDU_BUF;
1099 buf_size = buf_size << mode->ht_info.ampdu_factor;
1102 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1104 /* examine state machine */
1105 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1107 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1108 #ifdef CONFIG_MAC80211_HT_DEBUG
1109 if (net_ratelimit())
1110 printk(KERN_DEBUG "unexpected Block Ack Req from "
1112 print_mac(mac, mgmt->sa), tid);
1113 #endif /* CONFIG_MAC80211_HT_DEBUG */
1117 /* prepare reordering buffer */
1118 tid_agg_rx->reorder_buf =
1119 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1120 if (!tid_agg_rx->reorder_buf) {
1121 if (net_ratelimit())
1122 printk(KERN_ERR "can not allocate reordering buffer "
1123 "to tid %d\n", tid);
1126 memset(tid_agg_rx->reorder_buf, 0,
1127 buf_size * sizeof(struct sk_buf *));
1129 if (local->ops->ampdu_action)
1130 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1131 sta->addr, tid, &start_seq_num);
1132 #ifdef CONFIG_MAC80211_HT_DEBUG
1133 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1134 #endif /* CONFIG_MAC80211_HT_DEBUG */
1137 kfree(tid_agg_rx->reorder_buf);
1141 /* change state and send addba resp */
1142 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1143 tid_agg_rx->dialog_token = dialog_token;
1144 tid_agg_rx->ssn = start_seq_num;
1145 tid_agg_rx->head_seq_num = start_seq_num;
1146 tid_agg_rx->buf_size = buf_size;
1147 tid_agg_rx->timeout = timeout;
1148 tid_agg_rx->stored_mpdu_num = 0;
1149 status = WLAN_STATUS_SUCCESS;
1151 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1154 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1155 status, 1, buf_size, timeout);
1159 static void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1160 u16 initiator, u16 reason_code)
1162 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1163 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1164 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1165 struct sk_buff *skb;
1166 struct ieee80211_mgmt *mgmt;
1169 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1170 sizeof(mgmt->u.action.u.delba));
1173 printk(KERN_ERR "%s: failed to allocate buffer "
1174 "for delba frame\n", dev->name);
1178 skb_reserve(skb, local->hw.extra_tx_headroom);
1179 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1180 memset(mgmt, 0, 24);
1181 memcpy(mgmt->da, da, ETH_ALEN);
1182 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1183 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1184 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1186 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1187 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1188 IEEE80211_STYPE_ACTION);
1190 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1192 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1193 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1194 params = (u16)(initiator << 11); /* bit 11 initiator */
1195 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1197 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1198 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1200 ieee80211_sta_tx(dev, skb, 0);
1203 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1204 u16 initiator, u16 reason)
1206 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1207 struct ieee80211_hw *hw = &local->hw;
1208 struct sta_info *sta;
1211 sta = sta_info_get(local, ra);
1215 /* check if TID is in operational state */
1216 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1217 if (sta->ampdu_mlme.tid_rx[tid].state
1218 != HT_AGG_STATE_OPERATIONAL) {
1219 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1223 sta->ampdu_mlme.tid_rx[tid].state =
1224 HT_AGG_STATE_REQ_STOP_BA_MSK |
1225 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1226 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1228 /* stop HW Rx aggregation. ampdu_action existence
1229 * already verified in session init so we add the BUG_ON */
1230 BUG_ON(!local->ops->ampdu_action);
1232 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1235 printk(KERN_DEBUG "HW problem - can not stop rx "
1236 "aggergation for tid %d\n", tid);
1238 /* shutdown timer has not expired */
1239 if (initiator != WLAN_BACK_TIMER)
1240 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1243 /* check if this is a self generated aggregation halt */
1244 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1245 ieee80211_send_delba(dev, ra, tid, 0, reason);
1247 /* free the reordering buffer */
1248 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1249 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1250 /* release the reordered frames */
1251 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1252 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1253 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1256 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1258 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1262 static void ieee80211_sta_process_delba(struct net_device *dev,
1263 struct ieee80211_mgmt *mgmt, size_t len)
1265 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1266 struct sta_info *sta;
1269 DECLARE_MAC_BUF(mac);
1271 sta = sta_info_get(local, mgmt->sa);
1275 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1276 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1277 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1279 #ifdef CONFIG_MAC80211_HT_DEBUG
1280 if (net_ratelimit())
1281 printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n",
1282 print_mac(mac, mgmt->sa), tid,
1283 mgmt->u.action.u.delba.reason_code);
1284 #endif /* CONFIG_MAC80211_HT_DEBUG */
1286 if (initiator == WLAN_BACK_INITIATOR)
1287 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1288 WLAN_BACK_INITIATOR, 0);
1293 * After receiving Block Ack Request (BAR) we activated a
1294 * timer after each frame arrives from the originator.
1295 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1297 void sta_rx_agg_session_timer_expired(unsigned long data)
1299 /* not an elegant detour, but there is no choice as the timer passes
1300 * only one argument, and verious sta_info are needed here, so init
1301 * flow in sta_info_add gives the TID as data, while the timer_to_id
1302 * array gives the sta through container_of */
1303 u8 *ptid = (u8 *)data;
1304 u8 *timer_to_id = ptid - *ptid;
1305 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1308 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1309 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1311 WLAN_REASON_QSTA_TIMEOUT);
1315 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1316 struct ieee80211_if_sta *ifsta,
1317 struct ieee80211_mgmt *mgmt,
1320 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1321 u16 auth_alg, auth_transaction, status_code;
1322 DECLARE_MAC_BUF(mac);
1324 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1325 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1326 printk(KERN_DEBUG "%s: authentication frame received from "
1327 "%s, but not in authenticate state - ignored\n",
1328 dev->name, print_mac(mac, mgmt->sa));
1333 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1334 "received from %s - ignored\n",
1335 dev->name, len, print_mac(mac, mgmt->sa));
1339 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1340 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1341 printk(KERN_DEBUG "%s: authentication frame received from "
1342 "unknown AP (SA=%s BSSID=%s) - "
1343 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1344 print_mac(mac, mgmt->bssid));
1348 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1349 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1350 printk(KERN_DEBUG "%s: authentication frame received from "
1351 "unknown BSSID (SA=%s BSSID=%s) - "
1352 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1353 print_mac(mac, mgmt->bssid));
1357 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1358 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1359 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1361 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1362 "transaction=%d status=%d)\n",
1363 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1364 auth_transaction, status_code);
1366 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1367 /* IEEE 802.11 standard does not require authentication in IBSS
1368 * networks and most implementations do not seem to use it.
1369 * However, try to reply to authentication attempts if someone
1370 * has actually implemented this.
1371 * TODO: Could implement shared key authentication. */
1372 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1373 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1374 "frame (alg=%d transaction=%d)\n",
1375 dev->name, auth_alg, auth_transaction);
1378 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1381 if (auth_alg != ifsta->auth_alg ||
1382 auth_transaction != ifsta->auth_transaction) {
1383 printk(KERN_DEBUG "%s: unexpected authentication frame "
1384 "(alg=%d transaction=%d)\n",
1385 dev->name, auth_alg, auth_transaction);
1389 if (status_code != WLAN_STATUS_SUCCESS) {
1390 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1391 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1392 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1394 const int num_algs = ARRAY_SIZE(algs);
1396 algs[0] = algs[1] = algs[2] = 0xff;
1397 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1398 algs[0] = WLAN_AUTH_OPEN;
1399 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1400 algs[1] = WLAN_AUTH_SHARED_KEY;
1401 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1402 algs[2] = WLAN_AUTH_LEAP;
1403 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1405 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1409 for (i = 0; i < num_algs; i++) {
1411 if (pos >= num_algs)
1413 if (algs[pos] == ifsta->auth_alg ||
1416 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1417 !ieee80211_sta_wep_configured(dev))
1419 ifsta->auth_alg = algs[pos];
1420 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1422 dev->name, ifsta->auth_alg);
1429 switch (ifsta->auth_alg) {
1430 case WLAN_AUTH_OPEN:
1431 case WLAN_AUTH_LEAP:
1432 ieee80211_auth_completed(dev, ifsta);
1434 case WLAN_AUTH_SHARED_KEY:
1435 if (ifsta->auth_transaction == 4)
1436 ieee80211_auth_completed(dev, ifsta);
1438 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1444 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1445 struct ieee80211_if_sta *ifsta,
1446 struct ieee80211_mgmt *mgmt,
1450 DECLARE_MAC_BUF(mac);
1453 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1454 "received from %s - ignored\n",
1455 dev->name, len, print_mac(mac, mgmt->sa));
1459 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1460 printk(KERN_DEBUG "%s: deauthentication frame received from "
1461 "unknown AP (SA=%s BSSID=%s) - "
1462 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1463 print_mac(mac, mgmt->bssid));
1467 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1469 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1471 dev->name, print_mac(mac, mgmt->sa), reason_code);
1473 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1474 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1477 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1478 ifsta->state == IEEE80211_ASSOCIATE ||
1479 ifsta->state == IEEE80211_ASSOCIATED) {
1480 ifsta->state = IEEE80211_AUTHENTICATE;
1481 mod_timer(&ifsta->timer, jiffies +
1482 IEEE80211_RETRY_AUTH_INTERVAL);
1485 ieee80211_set_disassoc(dev, ifsta, 1);
1486 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1490 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1491 struct ieee80211_if_sta *ifsta,
1492 struct ieee80211_mgmt *mgmt,
1496 DECLARE_MAC_BUF(mac);
1499 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1500 "received from %s - ignored\n",
1501 dev->name, len, print_mac(mac, mgmt->sa));
1505 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1506 printk(KERN_DEBUG "%s: disassociation frame received from "
1507 "unknown AP (SA=%s BSSID=%s) - "
1508 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1509 print_mac(mac, mgmt->bssid));
1513 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1515 printk(KERN_DEBUG "%s: RX disassociation from %s"
1517 dev->name, print_mac(mac, mgmt->sa), reason_code);
1519 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1520 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1522 if (ifsta->state == IEEE80211_ASSOCIATED) {
1523 ifsta->state = IEEE80211_ASSOCIATE;
1524 mod_timer(&ifsta->timer, jiffies +
1525 IEEE80211_RETRY_AUTH_INTERVAL);
1528 ieee80211_set_disassoc(dev, ifsta, 0);
1532 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1533 struct ieee80211_if_sta *ifsta,
1534 struct ieee80211_mgmt *mgmt,
1538 struct ieee80211_local *local = sdata->local;
1539 struct net_device *dev = sdata->dev;
1540 struct ieee80211_hw_mode *mode;
1541 struct sta_info *sta;
1543 u16 capab_info, status_code, aid;
1544 struct ieee802_11_elems elems;
1545 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1548 DECLARE_MAC_BUF(mac);
1550 /* AssocResp and ReassocResp have identical structure, so process both
1551 * of them in this function. */
1553 if (ifsta->state != IEEE80211_ASSOCIATE) {
1554 printk(KERN_DEBUG "%s: association frame received from "
1555 "%s, but not in associate state - ignored\n",
1556 dev->name, print_mac(mac, mgmt->sa));
1561 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1562 "received from %s - ignored\n",
1563 dev->name, len, print_mac(mac, mgmt->sa));
1567 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1568 printk(KERN_DEBUG "%s: association frame received from "
1569 "unknown AP (SA=%s BSSID=%s) - "
1570 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1571 print_mac(mac, mgmt->bssid));
1575 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1576 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1577 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1579 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1580 "status=%d aid=%d)\n",
1581 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1582 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1584 if (status_code != WLAN_STATUS_SUCCESS) {
1585 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1586 dev->name, status_code);
1587 /* if this was a reassociation, ensure we try a "full"
1588 * association next time. This works around some broken APs
1589 * which do not correctly reject reassociation requests. */
1590 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1594 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1595 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1596 "set\n", dev->name, aid);
1597 aid &= ~(BIT(15) | BIT(14));
1599 pos = mgmt->u.assoc_resp.variable;
1600 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1602 if (!elems.supp_rates) {
1603 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1608 printk(KERN_DEBUG "%s: associated\n", dev->name);
1610 ifsta->ap_capab = capab_info;
1612 kfree(ifsta->assocresp_ies);
1613 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1614 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1615 if (ifsta->assocresp_ies)
1616 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1618 /* set AID, ieee80211_set_associated() will tell the driver */
1619 bss_conf->aid = aid;
1620 ieee80211_set_associated(dev, ifsta, 1);
1622 /* Add STA entry for the AP */
1623 sta = sta_info_get(local, ifsta->bssid);
1625 struct ieee80211_sta_bss *bss;
1626 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1628 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1629 " AP\n", dev->name);
1632 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1633 local->hw.conf.channel,
1634 ifsta->ssid, ifsta->ssid_len);
1636 sta->last_rssi = bss->rssi;
1637 sta->last_signal = bss->signal;
1638 sta->last_noise = bss->noise;
1639 ieee80211_rx_bss_put(dev, bss);
1644 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1647 mode = local->oper_hw_mode;
1648 for (i = 0; i < elems.supp_rates_len; i++) {
1649 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1650 for (j = 0; j < mode->num_rates; j++)
1651 if (mode->rates[j].rate == rate)
1654 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1655 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1656 for (j = 0; j < mode->num_rates; j++)
1657 if (mode->rates[j].rate == rate)
1660 sta->supp_rates = rates;
1662 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1663 local->ops->conf_ht) {
1664 struct ieee80211_ht_bss_info bss_info;
1666 ieee80211_ht_cap_ie_to_ht_info(
1667 (struct ieee80211_ht_cap *)
1668 elems.ht_cap_elem, &sta->ht_info);
1669 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1670 (struct ieee80211_ht_addt_info *)
1671 elems.ht_info_elem, &bss_info);
1672 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1675 rate_control_rate_init(sta, local);
1677 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1678 sta->flags |= WLAN_STA_WME;
1679 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1680 elems.wmm_param_len);
1686 ieee80211_associated(dev, ifsta);
1690 /* Caller must hold local->sta_bss_lock */
1691 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1692 struct ieee80211_sta_bss *bss)
1694 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1695 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1696 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1700 /* Caller must hold local->sta_bss_lock */
1701 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1702 struct ieee80211_sta_bss *bss)
1704 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1705 struct ieee80211_sta_bss *b, *prev = NULL;
1706 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1710 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1713 prev->hnext = bss->hnext;
1722 static struct ieee80211_sta_bss *
1723 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1724 u8 *ssid, u8 ssid_len)
1726 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1727 struct ieee80211_sta_bss *bss;
1729 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1732 atomic_inc(&bss->users);
1733 atomic_inc(&bss->users);
1734 memcpy(bss->bssid, bssid, ETH_ALEN);
1735 bss->channel = channel;
1736 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1737 memcpy(bss->ssid, ssid, ssid_len);
1738 bss->ssid_len = ssid_len;
1741 spin_lock_bh(&local->sta_bss_lock);
1742 /* TODO: order by RSSI? */
1743 list_add_tail(&bss->list, &local->sta_bss_list);
1744 __ieee80211_rx_bss_hash_add(dev, bss);
1745 spin_unlock_bh(&local->sta_bss_lock);
1750 static struct ieee80211_sta_bss *
1751 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1752 u8 *ssid, u8 ssid_len)
1754 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1755 struct ieee80211_sta_bss *bss;
1757 spin_lock_bh(&local->sta_bss_lock);
1758 bss = local->sta_bss_hash[STA_HASH(bssid)];
1760 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1761 bss->channel == channel &&
1762 bss->ssid_len == ssid_len &&
1763 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1764 atomic_inc(&bss->users);
1769 spin_unlock_bh(&local->sta_bss_lock);
1774 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1784 static void ieee80211_rx_bss_put(struct net_device *dev,
1785 struct ieee80211_sta_bss *bss)
1787 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1788 if (!atomic_dec_and_test(&bss->users))
1791 spin_lock_bh(&local->sta_bss_lock);
1792 __ieee80211_rx_bss_hash_del(dev, bss);
1793 list_del(&bss->list);
1794 spin_unlock_bh(&local->sta_bss_lock);
1795 ieee80211_rx_bss_free(bss);
1799 void ieee80211_rx_bss_list_init(struct net_device *dev)
1801 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1802 spin_lock_init(&local->sta_bss_lock);
1803 INIT_LIST_HEAD(&local->sta_bss_list);
1807 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1809 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1810 struct ieee80211_sta_bss *bss, *tmp;
1812 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1813 ieee80211_rx_bss_put(dev, bss);
1817 static void ieee80211_rx_bss_info(struct net_device *dev,
1818 struct ieee80211_mgmt *mgmt,
1820 struct ieee80211_rx_status *rx_status,
1823 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1824 struct ieee802_11_elems elems;
1827 struct ieee80211_sta_bss *bss;
1828 struct sta_info *sta;
1829 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1831 DECLARE_MAC_BUF(mac);
1832 DECLARE_MAC_BUF(mac2);
1834 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1835 return; /* ignore ProbeResp to foreign address */
1838 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
1839 dev->name, beacon ? "Beacon" : "Probe Response",
1840 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
1843 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1847 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1849 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
1850 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1851 #ifdef CONFIG_MAC80211_IBSS_DEBUG
1852 static unsigned long last_tsf_debug = 0;
1854 if (local->ops->get_tsf)
1855 tsf = local->ops->get_tsf(local_to_hw(local));
1858 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1859 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1860 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
1862 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
1863 (unsigned long long)tsf,
1864 (unsigned long long)timestamp,
1865 (unsigned long long)(tsf - timestamp),
1867 last_tsf_debug = jiffies;
1869 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
1872 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
1874 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1875 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1876 (sta = sta_info_get(local, mgmt->sa))) {
1877 struct ieee80211_hw_mode *mode;
1878 struct ieee80211_rate *rates;
1880 u32 supp_rates, prev_rates;
1883 mode = local->sta_sw_scanning ?
1884 local->scan_hw_mode : local->oper_hw_mode;
1886 if (local->sta_hw_scanning) {
1887 /* search for the correct mode matches the beacon */
1888 list_for_each_entry(mode, &local->modes_list, list)
1889 if (mode->mode == rx_status->phymode)
1893 mode = local->oper_hw_mode;
1895 rates = mode->rates;
1896 num_rates = mode->num_rates;
1899 for (i = 0; i < elems.supp_rates_len +
1900 elems.ext_supp_rates_len; i++) {
1903 if (i < elems.supp_rates_len)
1904 rate = elems.supp_rates[i];
1905 else if (elems.ext_supp_rates)
1906 rate = elems.ext_supp_rates
1907 [i - elems.supp_rates_len];
1908 own_rate = 5 * (rate & 0x7f);
1909 for (j = 0; j < num_rates; j++)
1910 if (rates[j].rate == own_rate)
1911 supp_rates |= BIT(j);
1914 prev_rates = sta->supp_rates;
1915 sta->supp_rates &= supp_rates;
1916 if (sta->supp_rates == 0) {
1917 /* No matching rates - this should not really happen.
1918 * Make sure that at least one rate is marked
1919 * supported to avoid issues with TX rate ctrl. */
1920 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1922 if (sta->supp_rates != prev_rates) {
1923 printk(KERN_DEBUG "%s: updated supp_rates set for "
1924 "%s based on beacon info (0x%x & 0x%x -> "
1926 dev->name, print_mac(mac, sta->addr), prev_rates,
1927 supp_rates, sta->supp_rates);
1935 if (elems.ds_params && elems.ds_params_len == 1)
1936 channel = elems.ds_params[0];
1938 channel = rx_status->channel;
1940 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1941 elems.ssid, elems.ssid_len);
1943 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1944 elems.ssid, elems.ssid_len);
1949 /* TODO: order by RSSI? */
1950 spin_lock_bh(&local->sta_bss_lock);
1951 list_move_tail(&bss->list, &local->sta_bss_list);
1952 spin_unlock_bh(&local->sta_bss_lock);
1956 if (bss->probe_resp && beacon) {
1957 /* Do not allow beacon to override data from Probe Response. */
1958 ieee80211_rx_bss_put(dev, bss);
1962 /* save the ERP value so that it is available at association time */
1963 if (elems.erp_info && elems.erp_info_len >= 1) {
1964 bss->erp_value = elems.erp_info[0];
1965 bss->has_erp_value = 1;
1968 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1969 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
1971 bss->supp_rates_len = 0;
1972 if (elems.supp_rates) {
1973 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1974 if (clen > elems.supp_rates_len)
1975 clen = elems.supp_rates_len;
1976 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1978 bss->supp_rates_len += clen;
1980 if (elems.ext_supp_rates) {
1981 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1982 if (clen > elems.ext_supp_rates_len)
1983 clen = elems.ext_supp_rates_len;
1984 memcpy(&bss->supp_rates[bss->supp_rates_len],
1985 elems.ext_supp_rates, clen);
1986 bss->supp_rates_len += clen;
1990 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1991 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1993 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1995 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1996 bss->wpa_ie_len = elems.wpa_len + 2;
1998 bss->wpa_ie_len = 0;
1999 } else if (!elems.wpa && bss->wpa_ie) {
2002 bss->wpa_ie_len = 0;
2006 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2007 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2009 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2011 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2012 bss->rsn_ie_len = elems.rsn_len + 2;
2014 bss->rsn_ie_len = 0;
2015 } else if (!elems.rsn && bss->rsn_ie) {
2018 bss->rsn_ie_len = 0;
2021 if (elems.wmm_param &&
2022 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2023 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2025 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2027 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2028 elems.wmm_param_len + 2);
2029 bss->wmm_ie_len = elems.wmm_param_len + 2;
2031 bss->wmm_ie_len = 0;
2032 } else if (!elems.wmm_param && bss->wmm_ie) {
2035 bss->wmm_ie_len = 0;
2037 if (elems.ht_cap_elem &&
2038 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2039 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2041 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2043 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2044 elems.ht_cap_elem_len + 2);
2045 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2048 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2054 bss->hw_mode = rx_status->phymode;
2055 bss->freq = rx_status->freq;
2056 if (channel != rx_status->channel &&
2057 (bss->hw_mode == MODE_IEEE80211G ||
2058 bss->hw_mode == MODE_IEEE80211B) &&
2059 channel >= 1 && channel <= 14) {
2060 static const int freq_list[] = {
2061 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2062 2447, 2452, 2457, 2462, 2467, 2472, 2484
2064 /* IEEE 802.11g/b mode can receive packets from neighboring
2065 * channels, so map the channel into frequency. */
2066 bss->freq = freq_list[channel - 1];
2068 bss->timestamp = timestamp;
2069 bss->last_update = jiffies;
2070 bss->rssi = rx_status->ssi;
2071 bss->signal = rx_status->signal;
2072 bss->noise = rx_status->noise;
2075 ieee80211_rx_bss_put(dev, bss);
2079 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2080 struct ieee80211_mgmt *mgmt,
2082 struct ieee80211_rx_status *rx_status)
2084 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2088 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2089 struct ieee80211_mgmt *mgmt,
2091 struct ieee80211_rx_status *rx_status)
2093 struct ieee80211_sub_if_data *sdata;
2094 struct ieee80211_if_sta *ifsta;
2096 struct ieee802_11_elems elems;
2097 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2098 struct ieee80211_conf *conf = &local->hw.conf;
2101 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2103 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2104 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2106 ifsta = &sdata->u.sta;
2108 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2109 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2112 /* Process beacon from the current BSS */
2113 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2117 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2119 if (elems.erp_info && elems.erp_info_len >= 1)
2120 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2122 if (elems.ht_cap_elem && elems.ht_info_elem &&
2123 elems.wmm_param && local->ops->conf_ht &&
2124 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2125 struct ieee80211_ht_bss_info bss_info;
2127 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2128 (struct ieee80211_ht_addt_info *)
2129 elems.ht_info_elem, &bss_info);
2130 /* check if AP changed bss inforamation */
2131 if ((conf->ht_bss_conf.primary_channel !=
2132 bss_info.primary_channel) ||
2133 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2134 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2135 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2139 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2140 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2141 elems.wmm_param_len);
2144 ieee80211_bss_info_change_notify(sdata, changed);
2148 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2149 struct ieee80211_if_sta *ifsta,
2150 struct ieee80211_mgmt *mgmt,
2152 struct ieee80211_rx_status *rx_status)
2154 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2157 struct sk_buff *skb;
2158 struct ieee80211_mgmt *resp;
2160 DECLARE_MAC_BUF(mac);
2161 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2162 DECLARE_MAC_BUF(mac2);
2163 DECLARE_MAC_BUF(mac3);
2166 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2167 ifsta->state != IEEE80211_IBSS_JOINED ||
2168 len < 24 + 2 || !ifsta->probe_resp)
2171 if (local->ops->tx_last_beacon)
2172 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2176 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2177 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2178 "%s (tx_last_beacon=%d)\n",
2179 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2180 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2181 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2183 if (!tx_last_beacon)
2186 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2187 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2190 end = ((u8 *) mgmt) + len;
2191 pos = mgmt->u.probe_req.variable;
2192 if (pos[0] != WLAN_EID_SSID ||
2193 pos + 2 + pos[1] > end) {
2194 if (net_ratelimit()) {
2195 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2197 dev->name, print_mac(mac, mgmt->sa));
2202 (pos[1] != ifsta->ssid_len ||
2203 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2204 /* Ignore ProbeReq for foreign SSID */
2208 /* Reply with ProbeResp */
2209 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2213 resp = (struct ieee80211_mgmt *) skb->data;
2214 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2215 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2216 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2217 dev->name, print_mac(mac, resp->da));
2218 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2219 ieee80211_sta_tx(dev, skb, 0);
2222 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2223 struct ieee80211_if_sta *ifsta,
2224 struct ieee80211_mgmt *mgmt,
2227 if (len < IEEE80211_MIN_ACTION_SIZE)
2230 switch (mgmt->u.action.category) {
2231 case WLAN_CATEGORY_BACK:
2232 switch (mgmt->u.action.u.addba_req.action_code) {
2233 case WLAN_ACTION_ADDBA_REQ:
2234 if (len < (IEEE80211_MIN_ACTION_SIZE +
2235 sizeof(mgmt->u.action.u.addba_req)))
2237 ieee80211_sta_process_addba_request(dev, mgmt, len);
2239 case WLAN_ACTION_DELBA:
2240 if (len < (IEEE80211_MIN_ACTION_SIZE +
2241 sizeof(mgmt->u.action.u.delba)))
2243 ieee80211_sta_process_delba(dev, mgmt, len);
2246 if (net_ratelimit())
2247 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2257 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2258 struct ieee80211_rx_status *rx_status)
2260 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2261 struct ieee80211_sub_if_data *sdata;
2262 struct ieee80211_if_sta *ifsta;
2263 struct ieee80211_mgmt *mgmt;
2269 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2270 ifsta = &sdata->u.sta;
2272 mgmt = (struct ieee80211_mgmt *) skb->data;
2273 fc = le16_to_cpu(mgmt->frame_control);
2275 switch (fc & IEEE80211_FCTL_STYPE) {
2276 case IEEE80211_STYPE_PROBE_REQ:
2277 case IEEE80211_STYPE_PROBE_RESP:
2278 case IEEE80211_STYPE_BEACON:
2279 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2280 case IEEE80211_STYPE_AUTH:
2281 case IEEE80211_STYPE_ASSOC_RESP:
2282 case IEEE80211_STYPE_REASSOC_RESP:
2283 case IEEE80211_STYPE_DEAUTH:
2284 case IEEE80211_STYPE_DISASSOC:
2285 case IEEE80211_STYPE_ACTION:
2286 skb_queue_tail(&ifsta->skb_queue, skb);
2287 queue_work(local->hw.workqueue, &ifsta->work);
2290 printk(KERN_DEBUG "%s: received unknown management frame - "
2291 "stype=%d\n", dev->name,
2292 (fc & IEEE80211_FCTL_STYPE) >> 4);
2301 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2302 struct sk_buff *skb)
2304 struct ieee80211_rx_status *rx_status;
2305 struct ieee80211_sub_if_data *sdata;
2306 struct ieee80211_if_sta *ifsta;
2307 struct ieee80211_mgmt *mgmt;
2310 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2311 ifsta = &sdata->u.sta;
2313 rx_status = (struct ieee80211_rx_status *) skb->cb;
2314 mgmt = (struct ieee80211_mgmt *) skb->data;
2315 fc = le16_to_cpu(mgmt->frame_control);
2317 switch (fc & IEEE80211_FCTL_STYPE) {
2318 case IEEE80211_STYPE_PROBE_REQ:
2319 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2322 case IEEE80211_STYPE_PROBE_RESP:
2323 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2325 case IEEE80211_STYPE_BEACON:
2326 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2328 case IEEE80211_STYPE_AUTH:
2329 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2331 case IEEE80211_STYPE_ASSOC_RESP:
2332 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2334 case IEEE80211_STYPE_REASSOC_RESP:
2335 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2337 case IEEE80211_STYPE_DEAUTH:
2338 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2340 case IEEE80211_STYPE_DISASSOC:
2341 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2343 case IEEE80211_STYPE_ACTION:
2344 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2352 ieee80211_txrx_result
2353 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2354 struct ieee80211_rx_status *rx_status)
2356 struct ieee80211_mgmt *mgmt;
2362 mgmt = (struct ieee80211_mgmt *) skb->data;
2363 fc = le16_to_cpu(mgmt->frame_control);
2365 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2366 return TXRX_CONTINUE;
2371 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2372 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2373 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2374 skb->len, rx_status);
2377 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2378 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2384 return TXRX_CONTINUE;
2388 static int ieee80211_sta_active_ibss(struct net_device *dev)
2390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2392 struct sta_info *sta;
2394 read_lock_bh(&local->sta_lock);
2395 list_for_each_entry(sta, &local->sta_list, list) {
2396 if (sta->dev == dev &&
2397 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2403 read_unlock_bh(&local->sta_lock);
2409 static void ieee80211_sta_expire(struct net_device *dev)
2411 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2412 struct sta_info *sta, *tmp;
2413 LIST_HEAD(tmp_list);
2414 DECLARE_MAC_BUF(mac);
2416 write_lock_bh(&local->sta_lock);
2417 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2418 if (time_after(jiffies, sta->last_rx +
2419 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2420 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2421 dev->name, print_mac(mac, sta->addr));
2422 __sta_info_get(sta);
2423 sta_info_remove(sta);
2424 list_add(&sta->list, &tmp_list);
2426 write_unlock_bh(&local->sta_lock);
2428 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2435 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2436 struct ieee80211_if_sta *ifsta)
2438 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2440 ieee80211_sta_expire(dev);
2441 if (ieee80211_sta_active_ibss(dev))
2444 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2445 "IBSS networks with same SSID (merge)\n", dev->name);
2446 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2450 void ieee80211_sta_timer(unsigned long data)
2452 struct ieee80211_sub_if_data *sdata =
2453 (struct ieee80211_sub_if_data *) data;
2454 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2455 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2457 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2458 queue_work(local->hw.workqueue, &ifsta->work);
2462 void ieee80211_sta_work(struct work_struct *work)
2464 struct ieee80211_sub_if_data *sdata =
2465 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2466 struct net_device *dev = sdata->dev;
2467 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2468 struct ieee80211_if_sta *ifsta;
2469 struct sk_buff *skb;
2471 if (!netif_running(dev))
2474 if (local->sta_sw_scanning || local->sta_hw_scanning)
2477 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2478 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2479 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2480 "(type=%d)\n", dev->name, sdata->vif.type);
2483 ifsta = &sdata->u.sta;
2485 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2486 ieee80211_sta_rx_queued_mgmt(dev, skb);
2488 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2489 ifsta->state != IEEE80211_ASSOCIATE &&
2490 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2491 if (ifsta->scan_ssid_len)
2492 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2494 ieee80211_sta_start_scan(dev, NULL, 0);
2498 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2499 if (ieee80211_sta_config_auth(dev, ifsta))
2501 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2502 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2505 switch (ifsta->state) {
2506 case IEEE80211_DISABLED:
2508 case IEEE80211_AUTHENTICATE:
2509 ieee80211_authenticate(dev, ifsta);
2511 case IEEE80211_ASSOCIATE:
2512 ieee80211_associate(dev, ifsta);
2514 case IEEE80211_ASSOCIATED:
2515 ieee80211_associated(dev, ifsta);
2517 case IEEE80211_IBSS_SEARCH:
2518 ieee80211_sta_find_ibss(dev, ifsta);
2520 case IEEE80211_IBSS_JOINED:
2521 ieee80211_sta_merge_ibss(dev, ifsta);
2524 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2529 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2530 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2531 "mixed-cell disabled - disassociate\n", dev->name);
2533 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2534 ieee80211_set_disassoc(dev, ifsta, 0);
2539 static void ieee80211_sta_reset_auth(struct net_device *dev,
2540 struct ieee80211_if_sta *ifsta)
2542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2544 if (local->ops->reset_tsf) {
2545 /* Reset own TSF to allow time synchronization work. */
2546 local->ops->reset_tsf(local_to_hw(local));
2549 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2552 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2553 ifsta->auth_alg = WLAN_AUTH_OPEN;
2554 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2555 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2556 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2557 ifsta->auth_alg = WLAN_AUTH_LEAP;
2559 ifsta->auth_alg = WLAN_AUTH_OPEN;
2560 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2562 ifsta->auth_transaction = -1;
2563 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2564 ifsta->auth_tries = ifsta->assoc_tries = 0;
2565 netif_carrier_off(dev);
2569 void ieee80211_sta_req_auth(struct net_device *dev,
2570 struct ieee80211_if_sta *ifsta)
2572 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2575 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2578 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2579 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2580 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2581 IEEE80211_STA_AUTO_SSID_SEL))) {
2582 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2583 queue_work(local->hw.workqueue, &ifsta->work);
2587 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2588 const char *ssid, int ssid_len)
2590 int tmp, hidden_ssid;
2592 if (ssid_len == ifsta->ssid_len &&
2593 !memcmp(ifsta->ssid, ssid, ssid_len))
2596 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2602 if (ssid[tmp] != '\0') {
2608 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2611 if (ssid_len == 1 && ssid[0] == ' ')
2617 static int ieee80211_sta_config_auth(struct net_device *dev,
2618 struct ieee80211_if_sta *ifsta)
2620 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2621 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2622 struct ieee80211_sta_bss *bss, *selected = NULL;
2623 int top_rssi = 0, freq;
2625 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2626 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2627 ifsta->state = IEEE80211_AUTHENTICATE;
2628 ieee80211_sta_reset_auth(dev, ifsta);
2632 spin_lock_bh(&local->sta_bss_lock);
2633 freq = local->oper_channel->freq;
2634 list_for_each_entry(bss, &local->sta_bss_list, list) {
2635 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2638 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2639 !!sdata->default_key)
2642 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2646 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2647 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2650 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2651 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2654 if (!selected || top_rssi < bss->rssi) {
2656 top_rssi = bss->rssi;
2660 atomic_inc(&selected->users);
2661 spin_unlock_bh(&local->sta_bss_lock);
2664 ieee80211_set_channel(local, -1, selected->freq);
2665 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2666 ieee80211_sta_set_ssid(dev, selected->ssid,
2667 selected->ssid_len);
2668 ieee80211_sta_set_bssid(dev, selected->bssid);
2669 ieee80211_rx_bss_put(dev, selected);
2670 ifsta->state = IEEE80211_AUTHENTICATE;
2671 ieee80211_sta_reset_auth(dev, ifsta);
2674 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2675 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2676 ieee80211_sta_start_scan(dev, NULL, 0);
2678 ieee80211_sta_start_scan(dev, ifsta->ssid,
2680 ifsta->state = IEEE80211_AUTHENTICATE;
2681 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2683 ifsta->state = IEEE80211_DISABLED;
2688 static int ieee80211_sta_join_ibss(struct net_device *dev,
2689 struct ieee80211_if_sta *ifsta,
2690 struct ieee80211_sta_bss *bss)
2692 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2693 int res, rates, i, j;
2694 struct sk_buff *skb;
2695 struct ieee80211_mgmt *mgmt;
2696 struct ieee80211_tx_control control;
2697 struct ieee80211_hw_mode *mode;
2698 struct rate_selection ratesel;
2700 struct ieee80211_sub_if_data *sdata;
2702 /* Remove possible STA entries from other IBSS networks. */
2703 sta_info_flush(local, NULL);
2705 if (local->ops->reset_tsf) {
2706 /* Reset own TSF to allow time synchronization work. */
2707 local->ops->reset_tsf(local_to_hw(local));
2709 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2710 res = ieee80211_if_config(dev);
2714 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2716 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2717 sdata->drop_unencrypted = bss->capability &
2718 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2720 res = ieee80211_set_channel(local, -1, bss->freq);
2722 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2723 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2724 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2725 local->hw.conf.freq);
2729 /* Set beacon template based on scan results */
2730 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2735 skb_reserve(skb, local->hw.extra_tx_headroom);
2737 mgmt = (struct ieee80211_mgmt *)
2738 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2739 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2740 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2741 IEEE80211_STYPE_BEACON);
2742 memset(mgmt->da, 0xff, ETH_ALEN);
2743 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2744 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2745 mgmt->u.beacon.beacon_int =
2746 cpu_to_le16(local->hw.conf.beacon_int);
2747 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2749 pos = skb_put(skb, 2 + ifsta->ssid_len);
2750 *pos++ = WLAN_EID_SSID;
2751 *pos++ = ifsta->ssid_len;
2752 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2754 rates = bss->supp_rates_len;
2757 pos = skb_put(skb, 2 + rates);
2758 *pos++ = WLAN_EID_SUPP_RATES;
2760 memcpy(pos, bss->supp_rates, rates);
2762 pos = skb_put(skb, 2 + 1);
2763 *pos++ = WLAN_EID_DS_PARAMS;
2765 *pos++ = bss->channel;
2767 pos = skb_put(skb, 2 + 2);
2768 *pos++ = WLAN_EID_IBSS_PARAMS;
2770 /* FIX: set ATIM window based on scan results */
2774 if (bss->supp_rates_len > 8) {
2775 rates = bss->supp_rates_len - 8;
2776 pos = skb_put(skb, 2 + rates);
2777 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2779 memcpy(pos, &bss->supp_rates[8], rates);
2782 memset(&control, 0, sizeof(control));
2783 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2784 if (!ratesel.rate) {
2785 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2786 "for IBSS beacon\n", dev->name);
2789 control.vif = &sdata->vif;
2791 (sdata->bss_conf.use_short_preamble &&
2792 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2793 ratesel.rate->val2 : ratesel.rate->val;
2794 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2795 control.power_level = local->hw.conf.power_level;
2796 control.flags |= IEEE80211_TXCTL_NO_ACK;
2797 control.retry_limit = 1;
2799 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2800 if (ifsta->probe_resp) {
2801 mgmt = (struct ieee80211_mgmt *)
2802 ifsta->probe_resp->data;
2803 mgmt->frame_control =
2804 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2805 IEEE80211_STYPE_PROBE_RESP);
2807 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2808 "template for IBSS\n", dev->name);
2811 if (local->ops->beacon_update &&
2812 local->ops->beacon_update(local_to_hw(local),
2813 skb, &control) == 0) {
2814 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2815 "template based on scan results\n", dev->name);
2820 mode = local->oper_hw_mode;
2821 for (i = 0; i < bss->supp_rates_len; i++) {
2822 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2823 for (j = 0; j < mode->num_rates; j++)
2824 if (mode->rates[j].rate == bitrate)
2827 ifsta->supp_rates_bits = rates;
2831 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2832 "template\n", dev->name);
2836 ifsta->state = IEEE80211_IBSS_JOINED;
2837 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2839 ieee80211_rx_bss_put(dev, bss);
2845 static int ieee80211_sta_create_ibss(struct net_device *dev,
2846 struct ieee80211_if_sta *ifsta)
2848 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2849 struct ieee80211_sta_bss *bss;
2850 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2851 struct ieee80211_hw_mode *mode;
2852 u8 bssid[ETH_ALEN], *pos;
2854 DECLARE_MAC_BUF(mac);
2857 /* Easier testing, use fixed BSSID. */
2858 memset(bssid, 0xfe, ETH_ALEN);
2860 /* Generate random, not broadcast, locally administered BSSID. Mix in
2861 * own MAC address to make sure that devices that do not have proper
2862 * random number generator get different BSSID. */
2863 get_random_bytes(bssid, ETH_ALEN);
2864 for (i = 0; i < ETH_ALEN; i++)
2865 bssid[i] ^= dev->dev_addr[i];
2870 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2871 dev->name, print_mac(mac, bssid));
2873 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2874 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
2878 mode = local->oper_hw_mode;
2880 if (local->hw.conf.beacon_int == 0)
2881 local->hw.conf.beacon_int = 100;
2882 bss->beacon_int = local->hw.conf.beacon_int;
2883 bss->hw_mode = local->hw.conf.phymode;
2884 bss->freq = local->hw.conf.freq;
2885 bss->last_update = jiffies;
2886 bss->capability = WLAN_CAPABILITY_IBSS;
2887 if (sdata->default_key) {
2888 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2890 sdata->drop_unencrypted = 0;
2891 bss->supp_rates_len = mode->num_rates;
2892 pos = bss->supp_rates;
2893 for (i = 0; i < mode->num_rates; i++) {
2894 int rate = mode->rates[i].rate;
2895 *pos++ = (u8) (rate / 5);
2898 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2902 static int ieee80211_sta_find_ibss(struct net_device *dev,
2903 struct ieee80211_if_sta *ifsta)
2905 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2906 struct ieee80211_sta_bss *bss;
2910 DECLARE_MAC_BUF(mac);
2911 DECLARE_MAC_BUF(mac2);
2913 if (ifsta->ssid_len == 0)
2916 active_ibss = ieee80211_sta_active_ibss(dev);
2917 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2918 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2919 dev->name, active_ibss);
2920 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2921 spin_lock_bh(&local->sta_bss_lock);
2922 list_for_each_entry(bss, &local->sta_bss_list, list) {
2923 if (ifsta->ssid_len != bss->ssid_len ||
2924 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2925 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2927 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2928 printk(KERN_DEBUG " bssid=%s found\n",
2929 print_mac(mac, bss->bssid));
2930 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2931 memcpy(bssid, bss->bssid, ETH_ALEN);
2933 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2936 spin_unlock_bh(&local->sta_bss_lock);
2938 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2939 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2940 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
2941 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2942 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
2943 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2944 ifsta->ssid, ifsta->ssid_len))) {
2945 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
2946 " based on configured SSID\n",
2947 dev->name, print_mac(mac, bssid));
2948 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2950 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2951 printk(KERN_DEBUG " did not try to join ibss\n");
2952 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2954 /* Selected IBSS not found in current scan results - try to scan */
2955 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2956 !ieee80211_sta_active_ibss(dev)) {
2957 mod_timer(&ifsta->timer, jiffies +
2958 IEEE80211_IBSS_MERGE_INTERVAL);
2959 } else if (time_after(jiffies, local->last_scan_completed +
2960 IEEE80211_SCAN_INTERVAL)) {
2961 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2962 "join\n", dev->name);
2963 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2965 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2966 int interval = IEEE80211_SCAN_INTERVAL;
2968 if (time_after(jiffies, ifsta->ibss_join_req +
2969 IEEE80211_IBSS_JOIN_TIMEOUT)) {
2970 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
2971 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2972 return ieee80211_sta_create_ibss(dev, ifsta);
2973 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
2974 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2975 " configured channel %d (%d MHz)\n",
2976 dev->name, local->hw.conf.channel,
2977 local->hw.conf.freq);
2980 /* No IBSS found - decrease scan interval and continue
2982 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2985 ifsta->state = IEEE80211_IBSS_SEARCH;
2986 mod_timer(&ifsta->timer, jiffies + interval);
2994 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2996 struct ieee80211_sub_if_data *sdata;
2997 struct ieee80211_if_sta *ifsta;
2998 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3000 if (len > IEEE80211_MAX_SSID_LEN)
3003 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3005 if (local->ops->conf_tx) {
3006 struct ieee80211_tx_queue_params qparam;
3009 memset(&qparam, 0, sizeof(qparam));
3010 /* TODO: are these ok defaults for all hw_modes? */
3013 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3014 qparam.cw_max = 1023;
3015 qparam.burst_time = 0;
3016 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3018 local->ops->conf_tx(local_to_hw(local),
3019 i + IEEE80211_TX_QUEUE_DATA0,
3022 /* IBSS uses different parameters for Beacon sending */
3026 local->ops->conf_tx(local_to_hw(local),
3027 IEEE80211_TX_QUEUE_BEACON, &qparam);
3030 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3031 ifsta = &sdata->u.sta;
3033 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3034 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3035 memcpy(ifsta->ssid, ssid, len);
3036 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3037 ifsta->ssid_len = len;
3040 ifsta->flags |= IEEE80211_STA_SSID_SET;
3042 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3043 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3044 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3045 ifsta->ibss_join_req = jiffies;
3046 ifsta->state = IEEE80211_IBSS_SEARCH;
3047 return ieee80211_sta_find_ibss(dev, ifsta);
3053 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3055 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3056 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3057 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3058 *len = ifsta->ssid_len;
3063 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3065 struct ieee80211_sub_if_data *sdata;
3066 struct ieee80211_if_sta *ifsta;
3069 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3070 ifsta = &sdata->u.sta;
3072 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3073 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3074 res = ieee80211_if_config(dev);
3076 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3077 "the low-level driver\n", dev->name);
3082 if (is_valid_ether_addr(bssid))
3083 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3085 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3091 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3092 struct ieee80211_sub_if_data *sdata,
3095 struct sk_buff *skb;
3096 struct ieee80211_hdr *nullfunc;
3099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3101 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3102 "frame\n", sdata->dev->name);
3105 skb_reserve(skb, local->hw.extra_tx_headroom);
3107 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3108 memset(nullfunc, 0, 24);
3109 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3110 IEEE80211_FCTL_TODS;
3112 fc |= IEEE80211_FCTL_PM;
3113 nullfunc->frame_control = cpu_to_le16(fc);
3114 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3115 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3116 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3118 ieee80211_sta_tx(sdata->dev, skb, 0);
3122 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3124 struct ieee80211_local *local = hw_to_local(hw);
3125 struct net_device *dev = local->scan_dev;
3126 struct ieee80211_sub_if_data *sdata;
3127 union iwreq_data wrqu;
3129 local->last_scan_completed = jiffies;
3130 memset(&wrqu, 0, sizeof(wrqu));
3131 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3133 if (local->sta_hw_scanning) {
3134 local->sta_hw_scanning = 0;
3138 local->sta_sw_scanning = 0;
3139 if (ieee80211_hw_config(local))
3140 printk(KERN_DEBUG "%s: failed to restore operational "
3141 "channel after scan\n", dev->name);
3144 netif_tx_lock_bh(local->mdev);
3145 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3146 local->ops->configure_filter(local_to_hw(local),
3147 FIF_BCN_PRBRESP_PROMISC,
3148 &local->filter_flags,
3149 local->mdev->mc_count,
3150 local->mdev->mc_list);
3152 netif_tx_unlock_bh(local->mdev);
3155 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3157 /* No need to wake the master device. */
3158 if (sdata->dev == local->mdev)
3161 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3162 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3163 ieee80211_send_nullfunc(local, sdata, 0);
3164 ieee80211_sta_timer((unsigned long)sdata);
3167 netif_wake_queue(sdata->dev);
3172 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3173 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3174 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3175 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3176 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3177 !ieee80211_sta_active_ibss(dev)))
3178 ieee80211_sta_find_ibss(dev, ifsta);
3181 EXPORT_SYMBOL(ieee80211_scan_completed);
3183 void ieee80211_sta_scan_work(struct work_struct *work)
3185 struct ieee80211_local *local =
3186 container_of(work, struct ieee80211_local, scan_work.work);
3187 struct net_device *dev = local->scan_dev;
3188 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3189 struct ieee80211_hw_mode *mode;
3190 struct ieee80211_channel *chan;
3192 unsigned long next_delay = 0;
3194 if (!local->sta_sw_scanning)
3197 switch (local->scan_state) {
3198 case SCAN_SET_CHANNEL:
3199 mode = local->scan_hw_mode;
3200 if (local->scan_hw_mode->list.next == &local->modes_list &&
3201 local->scan_channel_idx >= mode->num_channels) {
3202 ieee80211_scan_completed(local_to_hw(local));
3205 skip = !(local->enabled_modes & (1 << mode->mode));
3206 chan = &mode->channels[local->scan_channel_idx];
3207 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3208 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3209 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3210 (local->hw_modes & local->enabled_modes &
3211 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3216 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3217 dev->name, chan->chan, chan->freq);
3220 local->scan_channel = chan;
3221 if (ieee80211_hw_config(local)) {
3222 printk(KERN_DEBUG "%s: failed to set channel "
3223 "%d (%d MHz) for scan\n", dev->name,
3224 chan->chan, chan->freq);
3229 local->scan_channel_idx++;
3230 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3231 if (local->scan_hw_mode->list.next != &local->modes_list) {
3232 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3233 struct ieee80211_hw_mode,
3235 local->scan_channel_idx = 0;
3242 next_delay = IEEE80211_PROBE_DELAY +
3243 usecs_to_jiffies(local->hw.channel_change_time);
3244 local->scan_state = SCAN_SEND_PROBE;
3246 case SCAN_SEND_PROBE:
3247 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3248 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3249 local->scan_ssid_len);
3250 next_delay = IEEE80211_CHANNEL_TIME;
3252 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3253 local->scan_state = SCAN_SET_CHANNEL;
3257 if (local->sta_sw_scanning)
3258 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3263 static int ieee80211_sta_start_scan(struct net_device *dev,
3264 u8 *ssid, size_t ssid_len)
3266 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3267 struct ieee80211_sub_if_data *sdata;
3269 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3272 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3273 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3276 * ScanType: ACTIVE, PASSIVE
3277 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3278 * a Probe frame during active scanning
3280 * MinChannelTime (>= ProbeDelay), in TU
3281 * MaxChannelTime: (>= MinChannelTime), in TU
3284 /* MLME-SCAN.confirm
3286 * ResultCode: SUCCESS, INVALID_PARAMETERS
3289 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3290 if (local->scan_dev == dev)
3295 if (local->ops->hw_scan) {
3296 int rc = local->ops->hw_scan(local_to_hw(local),
3299 local->sta_hw_scanning = 1;
3300 local->scan_dev = dev;
3305 local->sta_sw_scanning = 1;
3308 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3310 /* Don't stop the master interface, otherwise we can't transmit
3312 if (sdata->dev == local->mdev)
3315 netif_stop_queue(sdata->dev);
3316 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3317 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3318 ieee80211_send_nullfunc(local, sdata, 1);
3323 local->scan_ssid_len = ssid_len;
3324 memcpy(local->scan_ssid, ssid, ssid_len);
3326 local->scan_ssid_len = 0;
3327 local->scan_state = SCAN_SET_CHANNEL;
3328 local->scan_hw_mode = list_entry(local->modes_list.next,
3329 struct ieee80211_hw_mode,
3331 local->scan_channel_idx = 0;
3332 local->scan_dev = dev;
3334 netif_tx_lock_bh(local->mdev);
3335 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3336 local->ops->configure_filter(local_to_hw(local),
3337 FIF_BCN_PRBRESP_PROMISC,
3338 &local->filter_flags,
3339 local->mdev->mc_count,
3340 local->mdev->mc_list);
3341 netif_tx_unlock_bh(local->mdev);
3343 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3344 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3345 IEEE80211_CHANNEL_TIME);
3351 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3353 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3354 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3355 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3357 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3358 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3360 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3361 if (local->scan_dev == dev)
3366 ifsta->scan_ssid_len = ssid_len;
3368 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3369 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3370 queue_work(local->hw.workqueue, &ifsta->work);
3375 ieee80211_sta_scan_result(struct net_device *dev,
3376 struct ieee80211_sta_bss *bss,
3377 char *current_ev, char *end_buf)
3379 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3380 struct iw_event iwe;
3382 if (time_after(jiffies,
3383 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3386 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3389 memset(&iwe, 0, sizeof(iwe));
3390 iwe.cmd = SIOCGIWAP;
3391 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3392 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3393 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3396 memset(&iwe, 0, sizeof(iwe));
3397 iwe.cmd = SIOCGIWESSID;
3398 iwe.u.data.length = bss->ssid_len;
3399 iwe.u.data.flags = 1;
3400 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3403 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3404 memset(&iwe, 0, sizeof(iwe));
3405 iwe.cmd = SIOCGIWMODE;
3406 if (bss->capability & WLAN_CAPABILITY_ESS)
3407 iwe.u.mode = IW_MODE_MASTER;
3409 iwe.u.mode = IW_MODE_ADHOC;
3410 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3414 memset(&iwe, 0, sizeof(iwe));
3415 iwe.cmd = SIOCGIWFREQ;
3416 iwe.u.freq.m = bss->channel;
3418 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3420 iwe.u.freq.m = bss->freq * 100000;
3422 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3425 memset(&iwe, 0, sizeof(iwe));
3427 iwe.u.qual.qual = bss->signal;
3428 iwe.u.qual.level = bss->rssi;
3429 iwe.u.qual.noise = bss->noise;
3430 iwe.u.qual.updated = local->wstats_flags;
3431 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3434 memset(&iwe, 0, sizeof(iwe));
3435 iwe.cmd = SIOCGIWENCODE;
3436 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3437 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3439 iwe.u.data.flags = IW_ENCODE_DISABLED;
3440 iwe.u.data.length = 0;
3441 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3443 if (bss && bss->wpa_ie) {
3444 memset(&iwe, 0, sizeof(iwe));
3445 iwe.cmd = IWEVGENIE;
3446 iwe.u.data.length = bss->wpa_ie_len;
3447 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3451 if (bss && bss->rsn_ie) {
3452 memset(&iwe, 0, sizeof(iwe));
3453 iwe.cmd = IWEVGENIE;
3454 iwe.u.data.length = bss->rsn_ie_len;
3455 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3459 if (bss && bss->supp_rates_len > 0) {
3460 /* display all supported rates in readable format */
3461 char *p = current_ev + IW_EV_LCP_LEN;
3464 memset(&iwe, 0, sizeof(iwe));
3465 iwe.cmd = SIOCGIWRATE;
3466 /* Those two flags are ignored... */
3467 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3469 for (i = 0; i < bss->supp_rates_len; i++) {
3470 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3472 p = iwe_stream_add_value(current_ev, p,
3473 end_buf, &iwe, IW_EV_PARAM_LEN);
3480 buf = kmalloc(30, GFP_ATOMIC);
3482 memset(&iwe, 0, sizeof(iwe));
3483 iwe.cmd = IWEVCUSTOM;
3484 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3485 iwe.u.data.length = strlen(buf);
3486 current_ev = iwe_stream_add_point(current_ev, end_buf,
3496 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3498 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3499 char *current_ev = buf;
3500 char *end_buf = buf + len;
3501 struct ieee80211_sta_bss *bss;
3503 spin_lock_bh(&local->sta_bss_lock);
3504 list_for_each_entry(bss, &local->sta_bss_list, list) {
3505 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3506 spin_unlock_bh(&local->sta_bss_lock);
3509 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3512 spin_unlock_bh(&local->sta_bss_lock);
3513 return current_ev - buf;
3517 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3519 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3520 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3521 kfree(ifsta->extra_ie);
3523 ifsta->extra_ie = NULL;
3524 ifsta->extra_ie_len = 0;
3527 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3528 if (!ifsta->extra_ie) {
3529 ifsta->extra_ie_len = 0;
3532 memcpy(ifsta->extra_ie, ie, len);
3533 ifsta->extra_ie_len = len;
3538 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3539 struct sk_buff *skb, u8 *bssid,
3542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3543 struct sta_info *sta;
3544 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3545 DECLARE_MAC_BUF(mac);
3547 /* TODO: Could consider removing the least recently used entry and
3548 * allow new one to be added. */
3549 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3550 if (net_ratelimit()) {
3551 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3552 "entry %s\n", dev->name, print_mac(mac, addr));
3557 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3558 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3560 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3564 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3566 rate_control_rate_init(sta, local);
3568 return sta; /* caller will call sta_info_put() */
3572 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3574 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3575 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3577 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3580 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3581 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3584 ieee80211_send_deauth(dev, ifsta, reason);
3585 ieee80211_set_disassoc(dev, ifsta, 1);
3590 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3592 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3593 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3595 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3598 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3601 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3604 ieee80211_send_disassoc(dev, ifsta, reason);
3605 ieee80211_set_disassoc(dev, ifsta, 0);