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 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1049 u16 tid, u8 dialog_token, u16 start_seq_num,
1050 u16 agg_size, u16 timeout)
1052 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1055 struct sk_buff *skb;
1056 struct ieee80211_mgmt *mgmt;
1059 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1060 sizeof(mgmt->u.action.u.addba_req));
1064 printk(KERN_ERR "%s: failed to allocate buffer "
1065 "for addba request frame\n", dev->name);
1068 skb_reserve(skb, local->hw.extra_tx_headroom);
1069 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1070 memset(mgmt, 0, 24);
1071 memcpy(mgmt->da, da, ETH_ALEN);
1072 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1073 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1074 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1076 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1078 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1079 IEEE80211_STYPE_ACTION);
1081 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1083 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1084 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1086 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1087 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1088 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1089 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1091 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1093 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1094 mgmt->u.action.u.addba_req.start_seq_num =
1095 cpu_to_le16(start_seq_num << 4);
1097 ieee80211_sta_tx(dev, skb, 0);
1100 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1101 struct ieee80211_mgmt *mgmt,
1104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1105 struct ieee80211_hw *hw = &local->hw;
1106 struct ieee80211_conf *conf = &hw->conf;
1107 struct sta_info *sta;
1108 struct tid_ampdu_rx *tid_agg_rx;
1109 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1111 int ret = -EOPNOTSUPP;
1112 DECLARE_MAC_BUF(mac);
1114 sta = sta_info_get(local, mgmt->sa);
1118 /* extract session parameters from addba request frame */
1119 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1120 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1122 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1124 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1125 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1126 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1127 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1129 status = WLAN_STATUS_REQUEST_DECLINED;
1131 /* sanity check for incoming parameters:
1132 * check if configuration can support the BA policy
1133 * and if buffer size does not exceeds max value */
1134 if (((ba_policy != 1)
1135 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1136 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1137 status = WLAN_STATUS_INVALID_QOS_PARAM;
1138 #ifdef CONFIG_MAC80211_HT_DEBUG
1139 if (net_ratelimit())
1140 printk(KERN_DEBUG "Block Ack Req with bad params from "
1141 "%s on tid %u. policy %d, buffer size %d\n",
1142 print_mac(mac, mgmt->sa), tid, ba_policy,
1144 #endif /* CONFIG_MAC80211_HT_DEBUG */
1147 /* determine default buffer size */
1148 if (buf_size == 0) {
1149 struct ieee80211_hw_mode *mode = conf->mode;
1150 buf_size = IEEE80211_MIN_AMPDU_BUF;
1151 buf_size = buf_size << mode->ht_info.ampdu_factor;
1154 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1156 /* examine state machine */
1157 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1159 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1160 #ifdef CONFIG_MAC80211_HT_DEBUG
1161 if (net_ratelimit())
1162 printk(KERN_DEBUG "unexpected Block Ack Req from "
1164 print_mac(mac, mgmt->sa), tid);
1165 #endif /* CONFIG_MAC80211_HT_DEBUG */
1169 /* prepare reordering buffer */
1170 tid_agg_rx->reorder_buf =
1171 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1172 if (!tid_agg_rx->reorder_buf) {
1173 if (net_ratelimit())
1174 printk(KERN_ERR "can not allocate reordering buffer "
1175 "to tid %d\n", tid);
1178 memset(tid_agg_rx->reorder_buf, 0,
1179 buf_size * sizeof(struct sk_buf *));
1181 if (local->ops->ampdu_action)
1182 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1183 sta->addr, tid, &start_seq_num);
1184 #ifdef CONFIG_MAC80211_HT_DEBUG
1185 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1186 #endif /* CONFIG_MAC80211_HT_DEBUG */
1189 kfree(tid_agg_rx->reorder_buf);
1193 /* change state and send addba resp */
1194 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1195 tid_agg_rx->dialog_token = dialog_token;
1196 tid_agg_rx->ssn = start_seq_num;
1197 tid_agg_rx->head_seq_num = start_seq_num;
1198 tid_agg_rx->buf_size = buf_size;
1199 tid_agg_rx->timeout = timeout;
1200 tid_agg_rx->stored_mpdu_num = 0;
1201 status = WLAN_STATUS_SUCCESS;
1203 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1206 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1207 status, 1, buf_size, timeout);
1211 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1212 struct ieee80211_mgmt *mgmt,
1215 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1216 struct ieee80211_hw *hw = &local->hw;
1217 struct sta_info *sta;
1222 sta = sta_info_get(local, mgmt->sa);
1226 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1227 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1229 state = &sta->ampdu_mlme.tid_tx[tid].state;
1231 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1233 if (mgmt->u.action.u.addba_resp.dialog_token !=
1234 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1235 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1236 #ifdef CONFIG_MAC80211_HT_DEBUG
1237 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1238 #endif /* CONFIG_MAC80211_HT_DEBUG */
1243 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1244 #ifdef CONFIG_MAC80211_HT_DEBUG
1245 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1246 #endif /* CONFIG_MAC80211_HT_DEBUG */
1247 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1248 == WLAN_STATUS_SUCCESS) {
1249 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1250 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1251 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1257 if (*state & HT_ADDBA_RECEIVED_MSK)
1258 printk(KERN_DEBUG "double addBA response\n");
1260 *state |= HT_ADDBA_RECEIVED_MSK;
1261 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1263 if (*state == HT_AGG_STATE_OPERATIONAL) {
1264 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1265 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1268 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1269 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1271 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1273 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1274 /* this will allow the state check in stop_BA_session */
1275 *state = HT_AGG_STATE_OPERATIONAL;
1276 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1277 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1278 WLAN_BACK_INITIATOR);
1283 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1284 u16 initiator, u16 reason_code)
1286 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1287 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1288 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1289 struct sk_buff *skb;
1290 struct ieee80211_mgmt *mgmt;
1293 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1294 sizeof(mgmt->u.action.u.delba));
1297 printk(KERN_ERR "%s: failed to allocate buffer "
1298 "for delba frame\n", dev->name);
1302 skb_reserve(skb, local->hw.extra_tx_headroom);
1303 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1304 memset(mgmt, 0, 24);
1305 memcpy(mgmt->da, da, ETH_ALEN);
1306 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1307 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1308 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1310 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1311 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1312 IEEE80211_STYPE_ACTION);
1314 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1316 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1317 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1318 params = (u16)(initiator << 11); /* bit 11 initiator */
1319 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1321 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1322 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1324 ieee80211_sta_tx(dev, skb, 0);
1327 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1328 u16 initiator, u16 reason)
1330 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1331 struct ieee80211_hw *hw = &local->hw;
1332 struct sta_info *sta;
1335 sta = sta_info_get(local, ra);
1339 /* check if TID is in operational state */
1340 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1341 if (sta->ampdu_mlme.tid_rx[tid].state
1342 != HT_AGG_STATE_OPERATIONAL) {
1343 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1347 sta->ampdu_mlme.tid_rx[tid].state =
1348 HT_AGG_STATE_REQ_STOP_BA_MSK |
1349 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1350 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1352 /* stop HW Rx aggregation. ampdu_action existence
1353 * already verified in session init so we add the BUG_ON */
1354 BUG_ON(!local->ops->ampdu_action);
1356 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1359 printk(KERN_DEBUG "HW problem - can not stop rx "
1360 "aggergation for tid %d\n", tid);
1362 /* shutdown timer has not expired */
1363 if (initiator != WLAN_BACK_TIMER)
1364 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1367 /* check if this is a self generated aggregation halt */
1368 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1369 ieee80211_send_delba(dev, ra, tid, 0, reason);
1371 /* free the reordering buffer */
1372 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1373 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1374 /* release the reordered frames */
1375 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1376 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1377 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1380 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1382 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1387 static void ieee80211_sta_process_delba(struct net_device *dev,
1388 struct ieee80211_mgmt *mgmt, size_t len)
1390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1391 struct sta_info *sta;
1394 DECLARE_MAC_BUF(mac);
1396 sta = sta_info_get(local, mgmt->sa);
1400 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1401 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1402 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1404 #ifdef CONFIG_MAC80211_HT_DEBUG
1405 if (net_ratelimit())
1406 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1407 print_mac(mac, mgmt->sa),
1408 initiator ? "recipient" : "initiator", tid,
1409 mgmt->u.action.u.delba.reason_code);
1410 #endif /* CONFIG_MAC80211_HT_DEBUG */
1412 if (initiator == WLAN_BACK_INITIATOR)
1413 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1414 WLAN_BACK_INITIATOR, 0);
1415 else { /* WLAN_BACK_RECIPIENT */
1416 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1417 sta->ampdu_mlme.tid_tx[tid].state =
1418 HT_AGG_STATE_OPERATIONAL;
1419 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1420 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1421 WLAN_BACK_RECIPIENT);
1427 * After sending add Block Ack request we activated a timer until
1428 * add Block Ack response will arrive from the recipient.
1429 * If this timer expires sta_addba_resp_timer_expired will be executed.
1431 void sta_addba_resp_timer_expired(unsigned long data)
1433 /* not an elegant detour, but there is no choice as the timer passes
1434 * only one argument, and both sta_info and TID are needed, so init
1435 * flow in sta_info_add gives the TID as data, while the timer_to_id
1436 * array gives the sta through container_of */
1437 u16 tid = *(int *)data;
1438 struct sta_info *temp_sta = container_of((void *)data,
1439 struct sta_info, timer_to_tid[tid]);
1441 struct ieee80211_local *local = temp_sta->local;
1442 struct ieee80211_hw *hw = &local->hw;
1443 struct sta_info *sta;
1446 sta = sta_info_get(local, temp_sta->addr);
1450 state = &sta->ampdu_mlme.tid_tx[tid].state;
1451 /* check if the TID waits for addBA response */
1452 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1453 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1454 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1455 *state = HT_AGG_STATE_IDLE;
1456 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1457 "expecting addBA response there", tid);
1458 goto timer_expired_exit;
1461 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1463 /* go through the state check in stop_BA_session */
1464 *state = HT_AGG_STATE_OPERATIONAL;
1465 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1466 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1467 WLAN_BACK_INITIATOR);
1474 * After receiving Block Ack Request (BAR) we activated a
1475 * timer after each frame arrives from the originator.
1476 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1478 void sta_rx_agg_session_timer_expired(unsigned long data)
1480 /* not an elegant detour, but there is no choice as the timer passes
1481 * only one argument, and verious sta_info are needed here, so init
1482 * flow in sta_info_add gives the TID as data, while the timer_to_id
1483 * array gives the sta through container_of */
1484 u8 *ptid = (u8 *)data;
1485 u8 *timer_to_id = ptid - *ptid;
1486 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1489 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1490 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1492 WLAN_REASON_QSTA_TIMEOUT);
1496 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1497 struct ieee80211_if_sta *ifsta,
1498 struct ieee80211_mgmt *mgmt,
1501 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1502 u16 auth_alg, auth_transaction, status_code;
1503 DECLARE_MAC_BUF(mac);
1505 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1506 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1507 printk(KERN_DEBUG "%s: authentication frame received from "
1508 "%s, but not in authenticate state - ignored\n",
1509 dev->name, print_mac(mac, mgmt->sa));
1514 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1515 "received from %s - ignored\n",
1516 dev->name, len, print_mac(mac, mgmt->sa));
1520 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1521 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1522 printk(KERN_DEBUG "%s: authentication frame received from "
1523 "unknown AP (SA=%s BSSID=%s) - "
1524 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1525 print_mac(mac, mgmt->bssid));
1529 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1530 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1531 printk(KERN_DEBUG "%s: authentication frame received from "
1532 "unknown BSSID (SA=%s BSSID=%s) - "
1533 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1534 print_mac(mac, mgmt->bssid));
1538 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1539 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1540 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1542 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1543 "transaction=%d status=%d)\n",
1544 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1545 auth_transaction, status_code);
1547 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1548 /* IEEE 802.11 standard does not require authentication in IBSS
1549 * networks and most implementations do not seem to use it.
1550 * However, try to reply to authentication attempts if someone
1551 * has actually implemented this.
1552 * TODO: Could implement shared key authentication. */
1553 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1554 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1555 "frame (alg=%d transaction=%d)\n",
1556 dev->name, auth_alg, auth_transaction);
1559 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1562 if (auth_alg != ifsta->auth_alg ||
1563 auth_transaction != ifsta->auth_transaction) {
1564 printk(KERN_DEBUG "%s: unexpected authentication frame "
1565 "(alg=%d transaction=%d)\n",
1566 dev->name, auth_alg, auth_transaction);
1570 if (status_code != WLAN_STATUS_SUCCESS) {
1571 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1572 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1573 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1575 const int num_algs = ARRAY_SIZE(algs);
1577 algs[0] = algs[1] = algs[2] = 0xff;
1578 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1579 algs[0] = WLAN_AUTH_OPEN;
1580 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1581 algs[1] = WLAN_AUTH_SHARED_KEY;
1582 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1583 algs[2] = WLAN_AUTH_LEAP;
1584 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1586 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1590 for (i = 0; i < num_algs; i++) {
1592 if (pos >= num_algs)
1594 if (algs[pos] == ifsta->auth_alg ||
1597 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1598 !ieee80211_sta_wep_configured(dev))
1600 ifsta->auth_alg = algs[pos];
1601 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1603 dev->name, ifsta->auth_alg);
1610 switch (ifsta->auth_alg) {
1611 case WLAN_AUTH_OPEN:
1612 case WLAN_AUTH_LEAP:
1613 ieee80211_auth_completed(dev, ifsta);
1615 case WLAN_AUTH_SHARED_KEY:
1616 if (ifsta->auth_transaction == 4)
1617 ieee80211_auth_completed(dev, ifsta);
1619 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1625 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1626 struct ieee80211_if_sta *ifsta,
1627 struct ieee80211_mgmt *mgmt,
1631 DECLARE_MAC_BUF(mac);
1634 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1635 "received from %s - ignored\n",
1636 dev->name, len, print_mac(mac, mgmt->sa));
1640 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1641 printk(KERN_DEBUG "%s: deauthentication frame received from "
1642 "unknown AP (SA=%s BSSID=%s) - "
1643 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1644 print_mac(mac, mgmt->bssid));
1648 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1650 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1652 dev->name, print_mac(mac, mgmt->sa), reason_code);
1654 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1655 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1658 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1659 ifsta->state == IEEE80211_ASSOCIATE ||
1660 ifsta->state == IEEE80211_ASSOCIATED) {
1661 ifsta->state = IEEE80211_AUTHENTICATE;
1662 mod_timer(&ifsta->timer, jiffies +
1663 IEEE80211_RETRY_AUTH_INTERVAL);
1666 ieee80211_set_disassoc(dev, ifsta, 1);
1667 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1671 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1672 struct ieee80211_if_sta *ifsta,
1673 struct ieee80211_mgmt *mgmt,
1677 DECLARE_MAC_BUF(mac);
1680 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1681 "received from %s - ignored\n",
1682 dev->name, len, print_mac(mac, mgmt->sa));
1686 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1687 printk(KERN_DEBUG "%s: disassociation frame received from "
1688 "unknown AP (SA=%s BSSID=%s) - "
1689 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1690 print_mac(mac, mgmt->bssid));
1694 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1696 printk(KERN_DEBUG "%s: RX disassociation from %s"
1698 dev->name, print_mac(mac, mgmt->sa), reason_code);
1700 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1701 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1703 if (ifsta->state == IEEE80211_ASSOCIATED) {
1704 ifsta->state = IEEE80211_ASSOCIATE;
1705 mod_timer(&ifsta->timer, jiffies +
1706 IEEE80211_RETRY_AUTH_INTERVAL);
1709 ieee80211_set_disassoc(dev, ifsta, 0);
1713 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1714 struct ieee80211_if_sta *ifsta,
1715 struct ieee80211_mgmt *mgmt,
1719 struct ieee80211_local *local = sdata->local;
1720 struct net_device *dev = sdata->dev;
1721 struct ieee80211_hw_mode *mode;
1722 struct sta_info *sta;
1724 u16 capab_info, status_code, aid;
1725 struct ieee802_11_elems elems;
1726 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1729 DECLARE_MAC_BUF(mac);
1731 /* AssocResp and ReassocResp have identical structure, so process both
1732 * of them in this function. */
1734 if (ifsta->state != IEEE80211_ASSOCIATE) {
1735 printk(KERN_DEBUG "%s: association frame received from "
1736 "%s, but not in associate state - ignored\n",
1737 dev->name, print_mac(mac, mgmt->sa));
1742 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1743 "received from %s - ignored\n",
1744 dev->name, len, print_mac(mac, mgmt->sa));
1748 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1749 printk(KERN_DEBUG "%s: association frame received from "
1750 "unknown AP (SA=%s BSSID=%s) - "
1751 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1752 print_mac(mac, mgmt->bssid));
1756 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1757 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1758 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1760 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1761 "status=%d aid=%d)\n",
1762 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1763 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1765 if (status_code != WLAN_STATUS_SUCCESS) {
1766 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1767 dev->name, status_code);
1768 /* if this was a reassociation, ensure we try a "full"
1769 * association next time. This works around some broken APs
1770 * which do not correctly reject reassociation requests. */
1771 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1775 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1776 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1777 "set\n", dev->name, aid);
1778 aid &= ~(BIT(15) | BIT(14));
1780 pos = mgmt->u.assoc_resp.variable;
1781 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1783 if (!elems.supp_rates) {
1784 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1789 printk(KERN_DEBUG "%s: associated\n", dev->name);
1791 ifsta->ap_capab = capab_info;
1793 kfree(ifsta->assocresp_ies);
1794 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1795 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1796 if (ifsta->assocresp_ies)
1797 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1799 /* set AID, ieee80211_set_associated() will tell the driver */
1800 bss_conf->aid = aid;
1801 ieee80211_set_associated(dev, ifsta, 1);
1803 /* Add STA entry for the AP */
1804 sta = sta_info_get(local, ifsta->bssid);
1806 struct ieee80211_sta_bss *bss;
1807 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1809 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1810 " AP\n", dev->name);
1813 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1814 local->hw.conf.channel,
1815 ifsta->ssid, ifsta->ssid_len);
1817 sta->last_rssi = bss->rssi;
1818 sta->last_signal = bss->signal;
1819 sta->last_noise = bss->noise;
1820 ieee80211_rx_bss_put(dev, bss);
1825 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
1828 mode = local->oper_hw_mode;
1829 for (i = 0; i < elems.supp_rates_len; i++) {
1830 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1831 for (j = 0; j < mode->num_rates; j++)
1832 if (mode->rates[j].rate == rate)
1835 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1836 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1837 for (j = 0; j < mode->num_rates; j++)
1838 if (mode->rates[j].rate == rate)
1841 sta->supp_rates = rates;
1843 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1844 local->ops->conf_ht) {
1845 struct ieee80211_ht_bss_info bss_info;
1847 ieee80211_ht_cap_ie_to_ht_info(
1848 (struct ieee80211_ht_cap *)
1849 elems.ht_cap_elem, &sta->ht_info);
1850 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1851 (struct ieee80211_ht_addt_info *)
1852 elems.ht_info_elem, &bss_info);
1853 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1856 rate_control_rate_init(sta, local);
1858 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1859 sta->flags |= WLAN_STA_WME;
1860 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1861 elems.wmm_param_len);
1867 ieee80211_associated(dev, ifsta);
1871 /* Caller must hold local->sta_bss_lock */
1872 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1873 struct ieee80211_sta_bss *bss)
1875 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1876 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1877 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1881 /* Caller must hold local->sta_bss_lock */
1882 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1883 struct ieee80211_sta_bss *bss)
1885 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1886 struct ieee80211_sta_bss *b, *prev = NULL;
1887 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1891 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1894 prev->hnext = bss->hnext;
1903 static struct ieee80211_sta_bss *
1904 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1905 u8 *ssid, u8 ssid_len)
1907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1908 struct ieee80211_sta_bss *bss;
1910 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1913 atomic_inc(&bss->users);
1914 atomic_inc(&bss->users);
1915 memcpy(bss->bssid, bssid, ETH_ALEN);
1916 bss->channel = channel;
1917 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1918 memcpy(bss->ssid, ssid, ssid_len);
1919 bss->ssid_len = ssid_len;
1922 spin_lock_bh(&local->sta_bss_lock);
1923 /* TODO: order by RSSI? */
1924 list_add_tail(&bss->list, &local->sta_bss_list);
1925 __ieee80211_rx_bss_hash_add(dev, bss);
1926 spin_unlock_bh(&local->sta_bss_lock);
1931 static struct ieee80211_sta_bss *
1932 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1933 u8 *ssid, u8 ssid_len)
1935 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1936 struct ieee80211_sta_bss *bss;
1938 spin_lock_bh(&local->sta_bss_lock);
1939 bss = local->sta_bss_hash[STA_HASH(bssid)];
1941 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1942 bss->channel == channel &&
1943 bss->ssid_len == ssid_len &&
1944 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1945 atomic_inc(&bss->users);
1950 spin_unlock_bh(&local->sta_bss_lock);
1955 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1965 static void ieee80211_rx_bss_put(struct net_device *dev,
1966 struct ieee80211_sta_bss *bss)
1968 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1969 if (!atomic_dec_and_test(&bss->users))
1972 spin_lock_bh(&local->sta_bss_lock);
1973 __ieee80211_rx_bss_hash_del(dev, bss);
1974 list_del(&bss->list);
1975 spin_unlock_bh(&local->sta_bss_lock);
1976 ieee80211_rx_bss_free(bss);
1980 void ieee80211_rx_bss_list_init(struct net_device *dev)
1982 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1983 spin_lock_init(&local->sta_bss_lock);
1984 INIT_LIST_HEAD(&local->sta_bss_list);
1988 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1990 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1991 struct ieee80211_sta_bss *bss, *tmp;
1993 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1994 ieee80211_rx_bss_put(dev, bss);
1998 static void ieee80211_rx_bss_info(struct net_device *dev,
1999 struct ieee80211_mgmt *mgmt,
2001 struct ieee80211_rx_status *rx_status,
2004 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2005 struct ieee802_11_elems elems;
2008 struct ieee80211_sta_bss *bss;
2009 struct sta_info *sta;
2010 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2012 DECLARE_MAC_BUF(mac);
2013 DECLARE_MAC_BUF(mac2);
2015 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2016 return; /* ignore ProbeResp to foreign address */
2019 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2020 dev->name, beacon ? "Beacon" : "Probe Response",
2021 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2024 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2028 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2030 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2031 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2032 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2033 static unsigned long last_tsf_debug = 0;
2035 if (local->ops->get_tsf)
2036 tsf = local->ops->get_tsf(local_to_hw(local));
2039 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2040 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2041 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2043 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2044 (unsigned long long)tsf,
2045 (unsigned long long)timestamp,
2046 (unsigned long long)(tsf - timestamp),
2048 last_tsf_debug = jiffies;
2050 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2053 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2055 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2056 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2057 (sta = sta_info_get(local, mgmt->sa))) {
2058 struct ieee80211_hw_mode *mode;
2059 struct ieee80211_rate *rates;
2061 u32 supp_rates, prev_rates;
2064 mode = local->sta_sw_scanning ?
2065 local->scan_hw_mode : local->oper_hw_mode;
2067 if (local->sta_hw_scanning) {
2068 /* search for the correct mode matches the beacon */
2069 list_for_each_entry(mode, &local->modes_list, list)
2070 if (mode->mode == rx_status->phymode)
2074 mode = local->oper_hw_mode;
2076 rates = mode->rates;
2077 num_rates = mode->num_rates;
2080 for (i = 0; i < elems.supp_rates_len +
2081 elems.ext_supp_rates_len; i++) {
2084 if (i < elems.supp_rates_len)
2085 rate = elems.supp_rates[i];
2086 else if (elems.ext_supp_rates)
2087 rate = elems.ext_supp_rates
2088 [i - elems.supp_rates_len];
2089 own_rate = 5 * (rate & 0x7f);
2090 for (j = 0; j < num_rates; j++)
2091 if (rates[j].rate == own_rate)
2092 supp_rates |= BIT(j);
2095 prev_rates = sta->supp_rates;
2096 sta->supp_rates &= supp_rates;
2097 if (sta->supp_rates == 0) {
2098 /* No matching rates - this should not really happen.
2099 * Make sure that at least one rate is marked
2100 * supported to avoid issues with TX rate ctrl. */
2101 sta->supp_rates = sdata->u.sta.supp_rates_bits;
2103 if (sta->supp_rates != prev_rates) {
2104 printk(KERN_DEBUG "%s: updated supp_rates set for "
2105 "%s based on beacon info (0x%x & 0x%x -> "
2107 dev->name, print_mac(mac, sta->addr), prev_rates,
2108 supp_rates, sta->supp_rates);
2116 if (elems.ds_params && elems.ds_params_len == 1)
2117 channel = elems.ds_params[0];
2119 channel = rx_status->channel;
2121 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
2122 elems.ssid, elems.ssid_len);
2124 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
2125 elems.ssid, elems.ssid_len);
2130 /* TODO: order by RSSI? */
2131 spin_lock_bh(&local->sta_bss_lock);
2132 list_move_tail(&bss->list, &local->sta_bss_list);
2133 spin_unlock_bh(&local->sta_bss_lock);
2137 if (bss->probe_resp && beacon) {
2138 /* Do not allow beacon to override data from Probe Response. */
2139 ieee80211_rx_bss_put(dev, bss);
2143 /* save the ERP value so that it is available at association time */
2144 if (elems.erp_info && elems.erp_info_len >= 1) {
2145 bss->erp_value = elems.erp_info[0];
2146 bss->has_erp_value = 1;
2149 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2150 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2152 bss->supp_rates_len = 0;
2153 if (elems.supp_rates) {
2154 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2155 if (clen > elems.supp_rates_len)
2156 clen = elems.supp_rates_len;
2157 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2159 bss->supp_rates_len += clen;
2161 if (elems.ext_supp_rates) {
2162 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2163 if (clen > elems.ext_supp_rates_len)
2164 clen = elems.ext_supp_rates_len;
2165 memcpy(&bss->supp_rates[bss->supp_rates_len],
2166 elems.ext_supp_rates, clen);
2167 bss->supp_rates_len += clen;
2171 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2172 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2174 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2176 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2177 bss->wpa_ie_len = elems.wpa_len + 2;
2179 bss->wpa_ie_len = 0;
2180 } else if (!elems.wpa && bss->wpa_ie) {
2183 bss->wpa_ie_len = 0;
2187 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2188 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2190 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2192 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2193 bss->rsn_ie_len = elems.rsn_len + 2;
2195 bss->rsn_ie_len = 0;
2196 } else if (!elems.rsn && bss->rsn_ie) {
2199 bss->rsn_ie_len = 0;
2202 if (elems.wmm_param &&
2203 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2204 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2206 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2208 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2209 elems.wmm_param_len + 2);
2210 bss->wmm_ie_len = elems.wmm_param_len + 2;
2212 bss->wmm_ie_len = 0;
2213 } else if (!elems.wmm_param && bss->wmm_ie) {
2216 bss->wmm_ie_len = 0;
2218 if (elems.ht_cap_elem &&
2219 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2220 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2222 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2224 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2225 elems.ht_cap_elem_len + 2);
2226 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2229 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2235 bss->hw_mode = rx_status->phymode;
2236 bss->freq = rx_status->freq;
2237 if (channel != rx_status->channel &&
2238 (bss->hw_mode == MODE_IEEE80211G ||
2239 bss->hw_mode == MODE_IEEE80211B) &&
2240 channel >= 1 && channel <= 14) {
2241 static const int freq_list[] = {
2242 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2243 2447, 2452, 2457, 2462, 2467, 2472, 2484
2245 /* IEEE 802.11g/b mode can receive packets from neighboring
2246 * channels, so map the channel into frequency. */
2247 bss->freq = freq_list[channel - 1];
2249 bss->timestamp = timestamp;
2250 bss->last_update = jiffies;
2251 bss->rssi = rx_status->ssi;
2252 bss->signal = rx_status->signal;
2253 bss->noise = rx_status->noise;
2256 ieee80211_rx_bss_put(dev, bss);
2260 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2261 struct ieee80211_mgmt *mgmt,
2263 struct ieee80211_rx_status *rx_status)
2265 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2269 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2270 struct ieee80211_mgmt *mgmt,
2272 struct ieee80211_rx_status *rx_status)
2274 struct ieee80211_sub_if_data *sdata;
2275 struct ieee80211_if_sta *ifsta;
2277 struct ieee802_11_elems elems;
2278 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2279 struct ieee80211_conf *conf = &local->hw.conf;
2282 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2284 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2285 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2287 ifsta = &sdata->u.sta;
2289 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2290 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2293 /* Process beacon from the current BSS */
2294 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2298 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2300 if (elems.erp_info && elems.erp_info_len >= 1)
2301 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2303 if (elems.ht_cap_elem && elems.ht_info_elem &&
2304 elems.wmm_param && local->ops->conf_ht &&
2305 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2306 struct ieee80211_ht_bss_info bss_info;
2308 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2309 (struct ieee80211_ht_addt_info *)
2310 elems.ht_info_elem, &bss_info);
2311 /* check if AP changed bss inforamation */
2312 if ((conf->ht_bss_conf.primary_channel !=
2313 bss_info.primary_channel) ||
2314 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2315 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2316 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2320 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2321 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2322 elems.wmm_param_len);
2325 ieee80211_bss_info_change_notify(sdata, changed);
2329 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2330 struct ieee80211_if_sta *ifsta,
2331 struct ieee80211_mgmt *mgmt,
2333 struct ieee80211_rx_status *rx_status)
2335 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2336 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2338 struct sk_buff *skb;
2339 struct ieee80211_mgmt *resp;
2341 DECLARE_MAC_BUF(mac);
2342 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2343 DECLARE_MAC_BUF(mac2);
2344 DECLARE_MAC_BUF(mac3);
2347 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2348 ifsta->state != IEEE80211_IBSS_JOINED ||
2349 len < 24 + 2 || !ifsta->probe_resp)
2352 if (local->ops->tx_last_beacon)
2353 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2357 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2358 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2359 "%s (tx_last_beacon=%d)\n",
2360 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2361 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2362 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2364 if (!tx_last_beacon)
2367 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2368 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2371 end = ((u8 *) mgmt) + len;
2372 pos = mgmt->u.probe_req.variable;
2373 if (pos[0] != WLAN_EID_SSID ||
2374 pos + 2 + pos[1] > end) {
2375 if (net_ratelimit()) {
2376 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2378 dev->name, print_mac(mac, mgmt->sa));
2383 (pos[1] != ifsta->ssid_len ||
2384 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2385 /* Ignore ProbeReq for foreign SSID */
2389 /* Reply with ProbeResp */
2390 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2394 resp = (struct ieee80211_mgmt *) skb->data;
2395 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2396 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2397 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2398 dev->name, print_mac(mac, resp->da));
2399 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2400 ieee80211_sta_tx(dev, skb, 0);
2403 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2404 struct ieee80211_if_sta *ifsta,
2405 struct ieee80211_mgmt *mgmt,
2408 if (len < IEEE80211_MIN_ACTION_SIZE)
2411 switch (mgmt->u.action.category) {
2412 case WLAN_CATEGORY_BACK:
2413 switch (mgmt->u.action.u.addba_req.action_code) {
2414 case WLAN_ACTION_ADDBA_REQ:
2415 if (len < (IEEE80211_MIN_ACTION_SIZE +
2416 sizeof(mgmt->u.action.u.addba_req)))
2418 ieee80211_sta_process_addba_request(dev, mgmt, len);
2420 case WLAN_ACTION_ADDBA_RESP:
2421 if (len < (IEEE80211_MIN_ACTION_SIZE +
2422 sizeof(mgmt->u.action.u.addba_resp)))
2424 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2426 case WLAN_ACTION_DELBA:
2427 if (len < (IEEE80211_MIN_ACTION_SIZE +
2428 sizeof(mgmt->u.action.u.delba)))
2430 ieee80211_sta_process_delba(dev, mgmt, len);
2433 if (net_ratelimit())
2434 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2444 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2445 struct ieee80211_rx_status *rx_status)
2447 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2448 struct ieee80211_sub_if_data *sdata;
2449 struct ieee80211_if_sta *ifsta;
2450 struct ieee80211_mgmt *mgmt;
2456 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2457 ifsta = &sdata->u.sta;
2459 mgmt = (struct ieee80211_mgmt *) skb->data;
2460 fc = le16_to_cpu(mgmt->frame_control);
2462 switch (fc & IEEE80211_FCTL_STYPE) {
2463 case IEEE80211_STYPE_PROBE_REQ:
2464 case IEEE80211_STYPE_PROBE_RESP:
2465 case IEEE80211_STYPE_BEACON:
2466 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2467 case IEEE80211_STYPE_AUTH:
2468 case IEEE80211_STYPE_ASSOC_RESP:
2469 case IEEE80211_STYPE_REASSOC_RESP:
2470 case IEEE80211_STYPE_DEAUTH:
2471 case IEEE80211_STYPE_DISASSOC:
2472 case IEEE80211_STYPE_ACTION:
2473 skb_queue_tail(&ifsta->skb_queue, skb);
2474 queue_work(local->hw.workqueue, &ifsta->work);
2477 printk(KERN_DEBUG "%s: received unknown management frame - "
2478 "stype=%d\n", dev->name,
2479 (fc & IEEE80211_FCTL_STYPE) >> 4);
2488 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2489 struct sk_buff *skb)
2491 struct ieee80211_rx_status *rx_status;
2492 struct ieee80211_sub_if_data *sdata;
2493 struct ieee80211_if_sta *ifsta;
2494 struct ieee80211_mgmt *mgmt;
2497 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2498 ifsta = &sdata->u.sta;
2500 rx_status = (struct ieee80211_rx_status *) skb->cb;
2501 mgmt = (struct ieee80211_mgmt *) skb->data;
2502 fc = le16_to_cpu(mgmt->frame_control);
2504 switch (fc & IEEE80211_FCTL_STYPE) {
2505 case IEEE80211_STYPE_PROBE_REQ:
2506 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2509 case IEEE80211_STYPE_PROBE_RESP:
2510 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2512 case IEEE80211_STYPE_BEACON:
2513 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2515 case IEEE80211_STYPE_AUTH:
2516 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2518 case IEEE80211_STYPE_ASSOC_RESP:
2519 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2521 case IEEE80211_STYPE_REASSOC_RESP:
2522 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2524 case IEEE80211_STYPE_DEAUTH:
2525 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2527 case IEEE80211_STYPE_DISASSOC:
2528 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2530 case IEEE80211_STYPE_ACTION:
2531 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2539 ieee80211_txrx_result
2540 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2541 struct ieee80211_rx_status *rx_status)
2543 struct ieee80211_mgmt *mgmt;
2549 mgmt = (struct ieee80211_mgmt *) skb->data;
2550 fc = le16_to_cpu(mgmt->frame_control);
2552 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2553 return TXRX_CONTINUE;
2558 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2559 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2560 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2561 skb->len, rx_status);
2564 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2565 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2571 return TXRX_CONTINUE;
2575 static int ieee80211_sta_active_ibss(struct net_device *dev)
2577 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2579 struct sta_info *sta;
2581 read_lock_bh(&local->sta_lock);
2582 list_for_each_entry(sta, &local->sta_list, list) {
2583 if (sta->dev == dev &&
2584 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2590 read_unlock_bh(&local->sta_lock);
2596 static void ieee80211_sta_expire(struct net_device *dev)
2598 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2599 struct sta_info *sta, *tmp;
2600 LIST_HEAD(tmp_list);
2601 DECLARE_MAC_BUF(mac);
2603 write_lock_bh(&local->sta_lock);
2604 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2605 if (time_after(jiffies, sta->last_rx +
2606 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2607 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2608 dev->name, print_mac(mac, sta->addr));
2609 __sta_info_get(sta);
2610 sta_info_remove(sta);
2611 list_add(&sta->list, &tmp_list);
2613 write_unlock_bh(&local->sta_lock);
2615 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2622 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2623 struct ieee80211_if_sta *ifsta)
2625 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2627 ieee80211_sta_expire(dev);
2628 if (ieee80211_sta_active_ibss(dev))
2631 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2632 "IBSS networks with same SSID (merge)\n", dev->name);
2633 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2637 void ieee80211_sta_timer(unsigned long data)
2639 struct ieee80211_sub_if_data *sdata =
2640 (struct ieee80211_sub_if_data *) data;
2641 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2642 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2644 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2645 queue_work(local->hw.workqueue, &ifsta->work);
2649 void ieee80211_sta_work(struct work_struct *work)
2651 struct ieee80211_sub_if_data *sdata =
2652 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2653 struct net_device *dev = sdata->dev;
2654 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2655 struct ieee80211_if_sta *ifsta;
2656 struct sk_buff *skb;
2658 if (!netif_running(dev))
2661 if (local->sta_sw_scanning || local->sta_hw_scanning)
2664 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2665 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2666 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2667 "(type=%d)\n", dev->name, sdata->vif.type);
2670 ifsta = &sdata->u.sta;
2672 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2673 ieee80211_sta_rx_queued_mgmt(dev, skb);
2675 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2676 ifsta->state != IEEE80211_ASSOCIATE &&
2677 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2678 if (ifsta->scan_ssid_len)
2679 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2681 ieee80211_sta_start_scan(dev, NULL, 0);
2685 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2686 if (ieee80211_sta_config_auth(dev, ifsta))
2688 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2689 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2692 switch (ifsta->state) {
2693 case IEEE80211_DISABLED:
2695 case IEEE80211_AUTHENTICATE:
2696 ieee80211_authenticate(dev, ifsta);
2698 case IEEE80211_ASSOCIATE:
2699 ieee80211_associate(dev, ifsta);
2701 case IEEE80211_ASSOCIATED:
2702 ieee80211_associated(dev, ifsta);
2704 case IEEE80211_IBSS_SEARCH:
2705 ieee80211_sta_find_ibss(dev, ifsta);
2707 case IEEE80211_IBSS_JOINED:
2708 ieee80211_sta_merge_ibss(dev, ifsta);
2711 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2716 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2717 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2718 "mixed-cell disabled - disassociate\n", dev->name);
2720 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2721 ieee80211_set_disassoc(dev, ifsta, 0);
2726 static void ieee80211_sta_reset_auth(struct net_device *dev,
2727 struct ieee80211_if_sta *ifsta)
2729 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2731 if (local->ops->reset_tsf) {
2732 /* Reset own TSF to allow time synchronization work. */
2733 local->ops->reset_tsf(local_to_hw(local));
2736 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2739 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2740 ifsta->auth_alg = WLAN_AUTH_OPEN;
2741 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2742 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2743 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2744 ifsta->auth_alg = WLAN_AUTH_LEAP;
2746 ifsta->auth_alg = WLAN_AUTH_OPEN;
2747 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2749 ifsta->auth_transaction = -1;
2750 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2751 ifsta->auth_tries = ifsta->assoc_tries = 0;
2752 netif_carrier_off(dev);
2756 void ieee80211_sta_req_auth(struct net_device *dev,
2757 struct ieee80211_if_sta *ifsta)
2759 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2760 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2762 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2765 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2766 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2767 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2768 IEEE80211_STA_AUTO_SSID_SEL))) {
2769 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2770 queue_work(local->hw.workqueue, &ifsta->work);
2774 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2775 const char *ssid, int ssid_len)
2777 int tmp, hidden_ssid;
2779 if (ssid_len == ifsta->ssid_len &&
2780 !memcmp(ifsta->ssid, ssid, ssid_len))
2783 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2789 if (ssid[tmp] != '\0') {
2795 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2798 if (ssid_len == 1 && ssid[0] == ' ')
2804 static int ieee80211_sta_config_auth(struct net_device *dev,
2805 struct ieee80211_if_sta *ifsta)
2807 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2808 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2809 struct ieee80211_sta_bss *bss, *selected = NULL;
2810 int top_rssi = 0, freq;
2812 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2813 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2814 ifsta->state = IEEE80211_AUTHENTICATE;
2815 ieee80211_sta_reset_auth(dev, ifsta);
2819 spin_lock_bh(&local->sta_bss_lock);
2820 freq = local->oper_channel->freq;
2821 list_for_each_entry(bss, &local->sta_bss_list, list) {
2822 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2825 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2826 !!sdata->default_key)
2829 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2833 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2834 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2837 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2838 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2841 if (!selected || top_rssi < bss->rssi) {
2843 top_rssi = bss->rssi;
2847 atomic_inc(&selected->users);
2848 spin_unlock_bh(&local->sta_bss_lock);
2851 ieee80211_set_channel(local, -1, selected->freq);
2852 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2853 ieee80211_sta_set_ssid(dev, selected->ssid,
2854 selected->ssid_len);
2855 ieee80211_sta_set_bssid(dev, selected->bssid);
2856 ieee80211_rx_bss_put(dev, selected);
2857 ifsta->state = IEEE80211_AUTHENTICATE;
2858 ieee80211_sta_reset_auth(dev, ifsta);
2861 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2862 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2863 ieee80211_sta_start_scan(dev, NULL, 0);
2865 ieee80211_sta_start_scan(dev, ifsta->ssid,
2867 ifsta->state = IEEE80211_AUTHENTICATE;
2868 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2870 ifsta->state = IEEE80211_DISABLED;
2875 static int ieee80211_sta_join_ibss(struct net_device *dev,
2876 struct ieee80211_if_sta *ifsta,
2877 struct ieee80211_sta_bss *bss)
2879 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2880 int res, rates, i, j;
2881 struct sk_buff *skb;
2882 struct ieee80211_mgmt *mgmt;
2883 struct ieee80211_tx_control control;
2884 struct ieee80211_hw_mode *mode;
2885 struct rate_selection ratesel;
2887 struct ieee80211_sub_if_data *sdata;
2889 /* Remove possible STA entries from other IBSS networks. */
2890 sta_info_flush(local, NULL);
2892 if (local->ops->reset_tsf) {
2893 /* Reset own TSF to allow time synchronization work. */
2894 local->ops->reset_tsf(local_to_hw(local));
2896 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2897 res = ieee80211_if_config(dev);
2901 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2903 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2904 sdata->drop_unencrypted = bss->capability &
2905 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2907 res = ieee80211_set_channel(local, -1, bss->freq);
2909 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2910 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2911 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2912 local->hw.conf.freq);
2916 /* Set beacon template based on scan results */
2917 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2922 skb_reserve(skb, local->hw.extra_tx_headroom);
2924 mgmt = (struct ieee80211_mgmt *)
2925 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2926 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2927 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2928 IEEE80211_STYPE_BEACON);
2929 memset(mgmt->da, 0xff, ETH_ALEN);
2930 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2931 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2932 mgmt->u.beacon.beacon_int =
2933 cpu_to_le16(local->hw.conf.beacon_int);
2934 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2936 pos = skb_put(skb, 2 + ifsta->ssid_len);
2937 *pos++ = WLAN_EID_SSID;
2938 *pos++ = ifsta->ssid_len;
2939 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2941 rates = bss->supp_rates_len;
2944 pos = skb_put(skb, 2 + rates);
2945 *pos++ = WLAN_EID_SUPP_RATES;
2947 memcpy(pos, bss->supp_rates, rates);
2949 pos = skb_put(skb, 2 + 1);
2950 *pos++ = WLAN_EID_DS_PARAMS;
2952 *pos++ = bss->channel;
2954 pos = skb_put(skb, 2 + 2);
2955 *pos++ = WLAN_EID_IBSS_PARAMS;
2957 /* FIX: set ATIM window based on scan results */
2961 if (bss->supp_rates_len > 8) {
2962 rates = bss->supp_rates_len - 8;
2963 pos = skb_put(skb, 2 + rates);
2964 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2966 memcpy(pos, &bss->supp_rates[8], rates);
2969 memset(&control, 0, sizeof(control));
2970 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2971 if (!ratesel.rate) {
2972 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2973 "for IBSS beacon\n", dev->name);
2976 control.vif = &sdata->vif;
2978 (sdata->bss_conf.use_short_preamble &&
2979 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2980 ratesel.rate->val2 : ratesel.rate->val;
2981 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2982 control.power_level = local->hw.conf.power_level;
2983 control.flags |= IEEE80211_TXCTL_NO_ACK;
2984 control.retry_limit = 1;
2986 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2987 if (ifsta->probe_resp) {
2988 mgmt = (struct ieee80211_mgmt *)
2989 ifsta->probe_resp->data;
2990 mgmt->frame_control =
2991 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2992 IEEE80211_STYPE_PROBE_RESP);
2994 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2995 "template for IBSS\n", dev->name);
2998 if (local->ops->beacon_update &&
2999 local->ops->beacon_update(local_to_hw(local),
3000 skb, &control) == 0) {
3001 printk(KERN_DEBUG "%s: Configured IBSS beacon "
3002 "template based on scan results\n", dev->name);
3007 mode = local->oper_hw_mode;
3008 for (i = 0; i < bss->supp_rates_len; i++) {
3009 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3010 for (j = 0; j < mode->num_rates; j++)
3011 if (mode->rates[j].rate == bitrate)
3014 ifsta->supp_rates_bits = rates;
3018 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3019 "template\n", dev->name);
3023 ifsta->state = IEEE80211_IBSS_JOINED;
3024 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3026 ieee80211_rx_bss_put(dev, bss);
3032 static int ieee80211_sta_create_ibss(struct net_device *dev,
3033 struct ieee80211_if_sta *ifsta)
3035 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3036 struct ieee80211_sta_bss *bss;
3037 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3038 struct ieee80211_hw_mode *mode;
3039 u8 bssid[ETH_ALEN], *pos;
3041 DECLARE_MAC_BUF(mac);
3044 /* Easier testing, use fixed BSSID. */
3045 memset(bssid, 0xfe, ETH_ALEN);
3047 /* Generate random, not broadcast, locally administered BSSID. Mix in
3048 * own MAC address to make sure that devices that do not have proper
3049 * random number generator get different BSSID. */
3050 get_random_bytes(bssid, ETH_ALEN);
3051 for (i = 0; i < ETH_ALEN; i++)
3052 bssid[i] ^= dev->dev_addr[i];
3057 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3058 dev->name, print_mac(mac, bssid));
3060 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
3061 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3065 mode = local->oper_hw_mode;
3067 if (local->hw.conf.beacon_int == 0)
3068 local->hw.conf.beacon_int = 100;
3069 bss->beacon_int = local->hw.conf.beacon_int;
3070 bss->hw_mode = local->hw.conf.phymode;
3071 bss->freq = local->hw.conf.freq;
3072 bss->last_update = jiffies;
3073 bss->capability = WLAN_CAPABILITY_IBSS;
3074 if (sdata->default_key) {
3075 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3077 sdata->drop_unencrypted = 0;
3078 bss->supp_rates_len = mode->num_rates;
3079 pos = bss->supp_rates;
3080 for (i = 0; i < mode->num_rates; i++) {
3081 int rate = mode->rates[i].rate;
3082 *pos++ = (u8) (rate / 5);
3085 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3089 static int ieee80211_sta_find_ibss(struct net_device *dev,
3090 struct ieee80211_if_sta *ifsta)
3092 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3093 struct ieee80211_sta_bss *bss;
3097 DECLARE_MAC_BUF(mac);
3098 DECLARE_MAC_BUF(mac2);
3100 if (ifsta->ssid_len == 0)
3103 active_ibss = ieee80211_sta_active_ibss(dev);
3104 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3105 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3106 dev->name, active_ibss);
3107 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3108 spin_lock_bh(&local->sta_bss_lock);
3109 list_for_each_entry(bss, &local->sta_bss_list, list) {
3110 if (ifsta->ssid_len != bss->ssid_len ||
3111 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3112 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3114 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3115 printk(KERN_DEBUG " bssid=%s found\n",
3116 print_mac(mac, bss->bssid));
3117 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3118 memcpy(bssid, bss->bssid, ETH_ALEN);
3120 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3123 spin_unlock_bh(&local->sta_bss_lock);
3125 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3126 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3127 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3128 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3129 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3130 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
3131 ifsta->ssid, ifsta->ssid_len))) {
3132 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3133 " based on configured SSID\n",
3134 dev->name, print_mac(mac, bssid));
3135 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3137 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3138 printk(KERN_DEBUG " did not try to join ibss\n");
3139 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3141 /* Selected IBSS not found in current scan results - try to scan */
3142 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3143 !ieee80211_sta_active_ibss(dev)) {
3144 mod_timer(&ifsta->timer, jiffies +
3145 IEEE80211_IBSS_MERGE_INTERVAL);
3146 } else if (time_after(jiffies, local->last_scan_completed +
3147 IEEE80211_SCAN_INTERVAL)) {
3148 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3149 "join\n", dev->name);
3150 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3152 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3153 int interval = IEEE80211_SCAN_INTERVAL;
3155 if (time_after(jiffies, ifsta->ibss_join_req +
3156 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3157 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3158 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
3159 return ieee80211_sta_create_ibss(dev, ifsta);
3160 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3161 printk(KERN_DEBUG "%s: IBSS not allowed on the"
3162 " configured channel %d (%d MHz)\n",
3163 dev->name, local->hw.conf.channel,
3164 local->hw.conf.freq);
3167 /* No IBSS found - decrease scan interval and continue
3169 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3172 ifsta->state = IEEE80211_IBSS_SEARCH;
3173 mod_timer(&ifsta->timer, jiffies + interval);
3181 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3183 struct ieee80211_sub_if_data *sdata;
3184 struct ieee80211_if_sta *ifsta;
3185 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3187 if (len > IEEE80211_MAX_SSID_LEN)
3190 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3192 if (local->ops->conf_tx) {
3193 struct ieee80211_tx_queue_params qparam;
3196 memset(&qparam, 0, sizeof(qparam));
3197 /* TODO: are these ok defaults for all hw_modes? */
3200 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3201 qparam.cw_max = 1023;
3202 qparam.burst_time = 0;
3203 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3205 local->ops->conf_tx(local_to_hw(local),
3206 i + IEEE80211_TX_QUEUE_DATA0,
3209 /* IBSS uses different parameters for Beacon sending */
3213 local->ops->conf_tx(local_to_hw(local),
3214 IEEE80211_TX_QUEUE_BEACON, &qparam);
3217 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3218 ifsta = &sdata->u.sta;
3220 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3221 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3222 memcpy(ifsta->ssid, ssid, len);
3223 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3224 ifsta->ssid_len = len;
3227 ifsta->flags |= IEEE80211_STA_SSID_SET;
3229 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3230 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3231 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3232 ifsta->ibss_join_req = jiffies;
3233 ifsta->state = IEEE80211_IBSS_SEARCH;
3234 return ieee80211_sta_find_ibss(dev, ifsta);
3240 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3242 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3243 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3244 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3245 *len = ifsta->ssid_len;
3250 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3252 struct ieee80211_sub_if_data *sdata;
3253 struct ieee80211_if_sta *ifsta;
3256 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3257 ifsta = &sdata->u.sta;
3259 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3260 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3261 res = ieee80211_if_config(dev);
3263 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3264 "the low-level driver\n", dev->name);
3269 if (is_valid_ether_addr(bssid))
3270 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3272 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3278 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3279 struct ieee80211_sub_if_data *sdata,
3282 struct sk_buff *skb;
3283 struct ieee80211_hdr *nullfunc;
3286 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3288 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3289 "frame\n", sdata->dev->name);
3292 skb_reserve(skb, local->hw.extra_tx_headroom);
3294 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3295 memset(nullfunc, 0, 24);
3296 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3297 IEEE80211_FCTL_TODS;
3299 fc |= IEEE80211_FCTL_PM;
3300 nullfunc->frame_control = cpu_to_le16(fc);
3301 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3302 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3303 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3305 ieee80211_sta_tx(sdata->dev, skb, 0);
3309 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3311 struct ieee80211_local *local = hw_to_local(hw);
3312 struct net_device *dev = local->scan_dev;
3313 struct ieee80211_sub_if_data *sdata;
3314 union iwreq_data wrqu;
3316 local->last_scan_completed = jiffies;
3317 memset(&wrqu, 0, sizeof(wrqu));
3318 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3320 if (local->sta_hw_scanning) {
3321 local->sta_hw_scanning = 0;
3325 local->sta_sw_scanning = 0;
3326 if (ieee80211_hw_config(local))
3327 printk(KERN_DEBUG "%s: failed to restore operational "
3328 "channel after scan\n", dev->name);
3331 netif_tx_lock_bh(local->mdev);
3332 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3333 local->ops->configure_filter(local_to_hw(local),
3334 FIF_BCN_PRBRESP_PROMISC,
3335 &local->filter_flags,
3336 local->mdev->mc_count,
3337 local->mdev->mc_list);
3339 netif_tx_unlock_bh(local->mdev);
3342 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3344 /* No need to wake the master device. */
3345 if (sdata->dev == local->mdev)
3348 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3349 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3350 ieee80211_send_nullfunc(local, sdata, 0);
3351 ieee80211_sta_timer((unsigned long)sdata);
3354 netif_wake_queue(sdata->dev);
3359 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3360 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3361 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3362 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3363 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3364 !ieee80211_sta_active_ibss(dev)))
3365 ieee80211_sta_find_ibss(dev, ifsta);
3368 EXPORT_SYMBOL(ieee80211_scan_completed);
3370 void ieee80211_sta_scan_work(struct work_struct *work)
3372 struct ieee80211_local *local =
3373 container_of(work, struct ieee80211_local, scan_work.work);
3374 struct net_device *dev = local->scan_dev;
3375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3376 struct ieee80211_hw_mode *mode;
3377 struct ieee80211_channel *chan;
3379 unsigned long next_delay = 0;
3381 if (!local->sta_sw_scanning)
3384 switch (local->scan_state) {
3385 case SCAN_SET_CHANNEL:
3386 mode = local->scan_hw_mode;
3387 if (local->scan_hw_mode->list.next == &local->modes_list &&
3388 local->scan_channel_idx >= mode->num_channels) {
3389 ieee80211_scan_completed(local_to_hw(local));
3392 skip = !(local->enabled_modes & (1 << mode->mode));
3393 chan = &mode->channels[local->scan_channel_idx];
3394 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3395 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3396 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3397 (local->hw_modes & local->enabled_modes &
3398 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3403 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3404 dev->name, chan->chan, chan->freq);
3407 local->scan_channel = chan;
3408 if (ieee80211_hw_config(local)) {
3409 printk(KERN_DEBUG "%s: failed to set channel "
3410 "%d (%d MHz) for scan\n", dev->name,
3411 chan->chan, chan->freq);
3416 local->scan_channel_idx++;
3417 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3418 if (local->scan_hw_mode->list.next != &local->modes_list) {
3419 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3420 struct ieee80211_hw_mode,
3422 local->scan_channel_idx = 0;
3429 next_delay = IEEE80211_PROBE_DELAY +
3430 usecs_to_jiffies(local->hw.channel_change_time);
3431 local->scan_state = SCAN_SEND_PROBE;
3433 case SCAN_SEND_PROBE:
3434 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3435 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3436 local->scan_ssid_len);
3437 next_delay = IEEE80211_CHANNEL_TIME;
3439 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3440 local->scan_state = SCAN_SET_CHANNEL;
3444 if (local->sta_sw_scanning)
3445 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3450 static int ieee80211_sta_start_scan(struct net_device *dev,
3451 u8 *ssid, size_t ssid_len)
3453 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3454 struct ieee80211_sub_if_data *sdata;
3456 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3459 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3460 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3463 * ScanType: ACTIVE, PASSIVE
3464 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3465 * a Probe frame during active scanning
3467 * MinChannelTime (>= ProbeDelay), in TU
3468 * MaxChannelTime: (>= MinChannelTime), in TU
3471 /* MLME-SCAN.confirm
3473 * ResultCode: SUCCESS, INVALID_PARAMETERS
3476 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3477 if (local->scan_dev == dev)
3482 if (local->ops->hw_scan) {
3483 int rc = local->ops->hw_scan(local_to_hw(local),
3486 local->sta_hw_scanning = 1;
3487 local->scan_dev = dev;
3492 local->sta_sw_scanning = 1;
3495 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3497 /* Don't stop the master interface, otherwise we can't transmit
3499 if (sdata->dev == local->mdev)
3502 netif_stop_queue(sdata->dev);
3503 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3504 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3505 ieee80211_send_nullfunc(local, sdata, 1);
3510 local->scan_ssid_len = ssid_len;
3511 memcpy(local->scan_ssid, ssid, ssid_len);
3513 local->scan_ssid_len = 0;
3514 local->scan_state = SCAN_SET_CHANNEL;
3515 local->scan_hw_mode = list_entry(local->modes_list.next,
3516 struct ieee80211_hw_mode,
3518 local->scan_channel_idx = 0;
3519 local->scan_dev = dev;
3521 netif_tx_lock_bh(local->mdev);
3522 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3523 local->ops->configure_filter(local_to_hw(local),
3524 FIF_BCN_PRBRESP_PROMISC,
3525 &local->filter_flags,
3526 local->mdev->mc_count,
3527 local->mdev->mc_list);
3528 netif_tx_unlock_bh(local->mdev);
3530 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3531 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3532 IEEE80211_CHANNEL_TIME);
3538 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3540 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3541 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3544 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3545 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3547 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3548 if (local->scan_dev == dev)
3553 ifsta->scan_ssid_len = ssid_len;
3555 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3556 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3557 queue_work(local->hw.workqueue, &ifsta->work);
3562 ieee80211_sta_scan_result(struct net_device *dev,
3563 struct ieee80211_sta_bss *bss,
3564 char *current_ev, char *end_buf)
3566 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3567 struct iw_event iwe;
3569 if (time_after(jiffies,
3570 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3573 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3576 memset(&iwe, 0, sizeof(iwe));
3577 iwe.cmd = SIOCGIWAP;
3578 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3579 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3580 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3583 memset(&iwe, 0, sizeof(iwe));
3584 iwe.cmd = SIOCGIWESSID;
3585 iwe.u.data.length = bss->ssid_len;
3586 iwe.u.data.flags = 1;
3587 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3590 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3591 memset(&iwe, 0, sizeof(iwe));
3592 iwe.cmd = SIOCGIWMODE;
3593 if (bss->capability & WLAN_CAPABILITY_ESS)
3594 iwe.u.mode = IW_MODE_MASTER;
3596 iwe.u.mode = IW_MODE_ADHOC;
3597 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3601 memset(&iwe, 0, sizeof(iwe));
3602 iwe.cmd = SIOCGIWFREQ;
3603 iwe.u.freq.m = bss->channel;
3605 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3607 iwe.u.freq.m = bss->freq * 100000;
3609 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3612 memset(&iwe, 0, sizeof(iwe));
3614 iwe.u.qual.qual = bss->signal;
3615 iwe.u.qual.level = bss->rssi;
3616 iwe.u.qual.noise = bss->noise;
3617 iwe.u.qual.updated = local->wstats_flags;
3618 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3621 memset(&iwe, 0, sizeof(iwe));
3622 iwe.cmd = SIOCGIWENCODE;
3623 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3624 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3626 iwe.u.data.flags = IW_ENCODE_DISABLED;
3627 iwe.u.data.length = 0;
3628 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3630 if (bss && bss->wpa_ie) {
3631 memset(&iwe, 0, sizeof(iwe));
3632 iwe.cmd = IWEVGENIE;
3633 iwe.u.data.length = bss->wpa_ie_len;
3634 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3638 if (bss && bss->rsn_ie) {
3639 memset(&iwe, 0, sizeof(iwe));
3640 iwe.cmd = IWEVGENIE;
3641 iwe.u.data.length = bss->rsn_ie_len;
3642 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3646 if (bss && bss->supp_rates_len > 0) {
3647 /* display all supported rates in readable format */
3648 char *p = current_ev + IW_EV_LCP_LEN;
3651 memset(&iwe, 0, sizeof(iwe));
3652 iwe.cmd = SIOCGIWRATE;
3653 /* Those two flags are ignored... */
3654 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3656 for (i = 0; i < bss->supp_rates_len; i++) {
3657 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3659 p = iwe_stream_add_value(current_ev, p,
3660 end_buf, &iwe, IW_EV_PARAM_LEN);
3667 buf = kmalloc(30, GFP_ATOMIC);
3669 memset(&iwe, 0, sizeof(iwe));
3670 iwe.cmd = IWEVCUSTOM;
3671 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3672 iwe.u.data.length = strlen(buf);
3673 current_ev = iwe_stream_add_point(current_ev, end_buf,
3683 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3685 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3686 char *current_ev = buf;
3687 char *end_buf = buf + len;
3688 struct ieee80211_sta_bss *bss;
3690 spin_lock_bh(&local->sta_bss_lock);
3691 list_for_each_entry(bss, &local->sta_bss_list, list) {
3692 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3693 spin_unlock_bh(&local->sta_bss_lock);
3696 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3699 spin_unlock_bh(&local->sta_bss_lock);
3700 return current_ev - buf;
3704 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3706 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3707 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3708 kfree(ifsta->extra_ie);
3710 ifsta->extra_ie = NULL;
3711 ifsta->extra_ie_len = 0;
3714 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3715 if (!ifsta->extra_ie) {
3716 ifsta->extra_ie_len = 0;
3719 memcpy(ifsta->extra_ie, ie, len);
3720 ifsta->extra_ie_len = len;
3725 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3726 struct sk_buff *skb, u8 *bssid,
3729 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3730 struct sta_info *sta;
3731 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3732 DECLARE_MAC_BUF(mac);
3734 /* TODO: Could consider removing the least recently used entry and
3735 * allow new one to be added. */
3736 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3737 if (net_ratelimit()) {
3738 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3739 "entry %s\n", dev->name, print_mac(mac, addr));
3744 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3745 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3747 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3751 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3753 rate_control_rate_init(sta, local);
3755 return sta; /* caller will call sta_info_put() */
3759 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3761 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3762 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3764 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3767 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3768 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3771 ieee80211_send_deauth(dev, ifsta, reason);
3772 ieee80211_set_disassoc(dev, ifsta, 1);
3777 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3780 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3782 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3785 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3788 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3791 ieee80211_send_disassoc(dev, ifsta, reason);
3792 ieee80211_set_disassoc(dev, ifsta, 0);