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 freq,
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->center_freq,
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);
597 struct ieee80211_mgmt *mgmt;
601 struct ieee80211_sta_bss *bss;
603 struct ieee80211_supported_band *sband;
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 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
617 capab = ifsta->capab;
619 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
620 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
621 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
622 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
623 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
626 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
627 local->hw.conf.channel->center_freq,
628 ifsta->ssid, ifsta->ssid_len);
630 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
631 capab |= WLAN_CAPABILITY_PRIVACY;
635 ieee80211_rx_bss_put(dev, bss);
638 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
640 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
641 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
642 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
644 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
646 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
647 IEEE80211_STYPE_REASSOC_REQ);
648 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
649 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
650 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
654 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
655 IEEE80211_STYPE_ASSOC_REQ);
656 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
657 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
661 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
662 *pos++ = WLAN_EID_SSID;
663 *pos++ = ifsta->ssid_len;
664 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
666 len = sband->n_bitrates;
669 pos = skb_put(skb, len + 2);
670 *pos++ = WLAN_EID_SUPP_RATES;
672 for (i = 0; i < len; i++) {
673 int rate = sband->bitrates[i].bitrate;
674 *pos++ = (u8) (rate / 5);
677 if (sband->n_bitrates > len) {
678 pos = skb_put(skb, sband->n_bitrates - len + 2);
679 *pos++ = WLAN_EID_EXT_SUPP_RATES;
680 *pos++ = sband->n_bitrates - len;
681 for (i = len; i < sband->n_bitrates; i++) {
682 int rate = sband->bitrates[i].bitrate;
683 *pos++ = (u8) (rate / 5);
687 if (ifsta->extra_ie) {
688 pos = skb_put(skb, ifsta->extra_ie_len);
689 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
692 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
693 pos = skb_put(skb, 9);
694 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
695 *pos++ = 7; /* len */
696 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
699 *pos++ = 2; /* WME */
700 *pos++ = 0; /* WME info */
701 *pos++ = 1; /* WME ver */
704 /* wmm support is a must to HT */
705 if (wmm && sband->ht_info.ht_supported) {
706 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
707 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
708 *pos++ = WLAN_EID_HT_CAPABILITY;
709 *pos++ = sizeof(struct ieee80211_ht_cap);
710 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
711 memcpy(pos, &tmp, sizeof(u16));
713 /* TODO: needs a define here for << 2 */
714 *pos++ = sband->ht_info.ampdu_factor |
715 (sband->ht_info.ampdu_density << 2);
716 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
719 kfree(ifsta->assocreq_ies);
720 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
721 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
722 if (ifsta->assocreq_ies)
723 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
725 ieee80211_sta_tx(dev, skb, 0);
729 static void ieee80211_send_deauth(struct net_device *dev,
730 struct ieee80211_if_sta *ifsta, u16 reason)
732 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
734 struct ieee80211_mgmt *mgmt;
736 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
738 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
739 "frame\n", dev->name);
742 skb_reserve(skb, local->hw.extra_tx_headroom);
744 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
746 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
747 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
748 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
749 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
750 IEEE80211_STYPE_DEAUTH);
752 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
754 ieee80211_sta_tx(dev, skb, 0);
758 static void ieee80211_send_disassoc(struct net_device *dev,
759 struct ieee80211_if_sta *ifsta, u16 reason)
761 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
763 struct ieee80211_mgmt *mgmt;
765 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
767 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
768 "frame\n", dev->name);
771 skb_reserve(skb, local->hw.extra_tx_headroom);
773 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
775 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
776 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
777 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
778 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
779 IEEE80211_STYPE_DISASSOC);
781 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
783 ieee80211_sta_tx(dev, skb, 0);
787 static int ieee80211_privacy_mismatch(struct net_device *dev,
788 struct ieee80211_if_sta *ifsta)
790 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
791 struct ieee80211_sta_bss *bss;
796 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
799 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
800 local->hw.conf.channel->center_freq,
801 ifsta->ssid, ifsta->ssid_len);
805 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
806 wep_privacy = !!ieee80211_sta_wep_configured(dev);
807 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
809 ieee80211_rx_bss_put(dev, bss);
811 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
818 static void ieee80211_associate(struct net_device *dev,
819 struct ieee80211_if_sta *ifsta)
821 DECLARE_MAC_BUF(mac);
823 ifsta->assoc_tries++;
824 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
825 printk(KERN_DEBUG "%s: association with AP %s"
827 dev->name, print_mac(mac, ifsta->bssid));
828 ifsta->state = IEEE80211_DISABLED;
832 ifsta->state = IEEE80211_ASSOCIATE;
833 printk(KERN_DEBUG "%s: associate with AP %s\n",
834 dev->name, print_mac(mac, ifsta->bssid));
835 if (ieee80211_privacy_mismatch(dev, ifsta)) {
836 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
837 "mixed-cell disabled - abort association\n", dev->name);
838 ifsta->state = IEEE80211_DISABLED;
842 ieee80211_send_assoc(dev, ifsta);
844 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
848 static void ieee80211_associated(struct net_device *dev,
849 struct ieee80211_if_sta *ifsta)
851 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
852 struct sta_info *sta;
854 DECLARE_MAC_BUF(mac);
856 /* TODO: start monitoring current AP signal quality and number of
857 * missed beacons. Scan other channels every now and then and search
859 /* TODO: remove expired BSSes */
861 ifsta->state = IEEE80211_ASSOCIATED;
863 sta = sta_info_get(local, ifsta->bssid);
865 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
866 dev->name, print_mac(mac, ifsta->bssid));
870 if (time_after(jiffies,
871 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
872 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
873 printk(KERN_DEBUG "%s: No ProbeResp from "
874 "current AP %s - assume out of "
876 dev->name, print_mac(mac, ifsta->bssid));
880 ieee80211_send_probe_req(dev, ifsta->bssid,
882 local->scan_ssid_len);
883 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
885 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
886 if (time_after(jiffies, ifsta->last_probe +
887 IEEE80211_PROBE_INTERVAL)) {
888 ifsta->last_probe = jiffies;
889 ieee80211_send_probe_req(dev, ifsta->bssid,
897 ifsta->state = IEEE80211_DISABLED;
898 ieee80211_set_associated(dev, ifsta, 0);
900 mod_timer(&ifsta->timer, jiffies +
901 IEEE80211_MONITORING_INTERVAL);
906 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
907 u8 *ssid, size_t ssid_len)
909 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
910 struct ieee80211_supported_band *sband;
912 struct ieee80211_mgmt *mgmt;
913 u8 *pos, *supp_rates, *esupp_rates = NULL;
916 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
918 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
919 "request\n", dev->name);
922 skb_reserve(skb, local->hw.extra_tx_headroom);
924 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
926 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
927 IEEE80211_STYPE_PROBE_REQ);
928 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
930 memcpy(mgmt->da, dst, ETH_ALEN);
931 memcpy(mgmt->bssid, dst, ETH_ALEN);
933 memset(mgmt->da, 0xff, ETH_ALEN);
934 memset(mgmt->bssid, 0xff, ETH_ALEN);
936 pos = skb_put(skb, 2 + ssid_len);
937 *pos++ = WLAN_EID_SSID;
939 memcpy(pos, ssid, ssid_len);
941 supp_rates = skb_put(skb, 2);
942 supp_rates[0] = WLAN_EID_SUPP_RATES;
944 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
946 for (i = 0; i < sband->n_bitrates; i++) {
947 struct ieee80211_rate *rate = &sband->bitrates[i];
949 pos = skb_put(skb, 1);
951 } else if (supp_rates[1] == 8) {
952 esupp_rates = skb_put(skb, 3);
953 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
955 pos = &esupp_rates[2];
957 pos = skb_put(skb, 1);
960 *pos = rate->bitrate / 5;
963 ieee80211_sta_tx(dev, skb, 0);
967 static int ieee80211_sta_wep_configured(struct net_device *dev)
969 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
970 if (!sdata || !sdata->default_key ||
971 sdata->default_key->conf.alg != ALG_WEP)
977 static void ieee80211_auth_completed(struct net_device *dev,
978 struct ieee80211_if_sta *ifsta)
980 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
981 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
982 ieee80211_associate(dev, ifsta);
986 static void ieee80211_auth_challenge(struct net_device *dev,
987 struct ieee80211_if_sta *ifsta,
988 struct ieee80211_mgmt *mgmt,
992 struct ieee802_11_elems elems;
994 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
995 pos = mgmt->u.auth.variable;
996 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
997 if (!elems.challenge) {
998 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
999 "frame\n", dev->name);
1002 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1003 elems.challenge_len + 2, 1);
1006 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1007 u8 dialog_token, u16 status, u16 policy,
1008 u16 buf_size, u16 timeout)
1010 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1011 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1012 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1013 struct sk_buff *skb;
1014 struct ieee80211_mgmt *mgmt;
1017 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1018 sizeof(mgmt->u.action.u.addba_resp));
1020 printk(KERN_DEBUG "%s: failed to allocate buffer "
1021 "for addba resp frame\n", dev->name);
1025 skb_reserve(skb, local->hw.extra_tx_headroom);
1026 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1027 memset(mgmt, 0, 24);
1028 memcpy(mgmt->da, da, ETH_ALEN);
1029 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1030 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1031 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1033 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1034 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1035 IEEE80211_STYPE_ACTION);
1037 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1038 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1039 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1040 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1042 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1043 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1044 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1046 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1047 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1048 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1050 ieee80211_sta_tx(dev, skb, 0);
1055 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1056 u16 tid, u8 dialog_token, u16 start_seq_num,
1057 u16 agg_size, u16 timeout)
1059 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1060 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1061 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1062 struct sk_buff *skb;
1063 struct ieee80211_mgmt *mgmt;
1066 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1067 sizeof(mgmt->u.action.u.addba_req));
1071 printk(KERN_ERR "%s: failed to allocate buffer "
1072 "for addba request frame\n", dev->name);
1075 skb_reserve(skb, local->hw.extra_tx_headroom);
1076 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1077 memset(mgmt, 0, 24);
1078 memcpy(mgmt->da, da, ETH_ALEN);
1079 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1080 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1081 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1083 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1085 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1086 IEEE80211_STYPE_ACTION);
1088 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1090 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1091 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1093 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1094 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1095 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1096 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1098 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1100 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1101 mgmt->u.action.u.addba_req.start_seq_num =
1102 cpu_to_le16(start_seq_num << 4);
1104 ieee80211_sta_tx(dev, skb, 0);
1107 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1108 struct ieee80211_mgmt *mgmt,
1111 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1112 struct ieee80211_hw *hw = &local->hw;
1113 struct ieee80211_conf *conf = &hw->conf;
1114 struct sta_info *sta;
1115 struct tid_ampdu_rx *tid_agg_rx;
1116 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1118 int ret = -EOPNOTSUPP;
1119 DECLARE_MAC_BUF(mac);
1121 sta = sta_info_get(local, mgmt->sa);
1125 /* extract session parameters from addba request frame */
1126 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1127 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1129 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1131 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1132 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1133 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1134 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1136 status = WLAN_STATUS_REQUEST_DECLINED;
1138 /* sanity check for incoming parameters:
1139 * check if configuration can support the BA policy
1140 * and if buffer size does not exceeds max value */
1141 if (((ba_policy != 1)
1142 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1143 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1144 status = WLAN_STATUS_INVALID_QOS_PARAM;
1145 #ifdef CONFIG_MAC80211_HT_DEBUG
1146 if (net_ratelimit())
1147 printk(KERN_DEBUG "Block Ack Req with bad params from "
1148 "%s on tid %u. policy %d, buffer size %d\n",
1149 print_mac(mac, mgmt->sa), tid, ba_policy,
1151 #endif /* CONFIG_MAC80211_HT_DEBUG */
1154 /* determine default buffer size */
1155 if (buf_size == 0) {
1156 struct ieee80211_supported_band *sband;
1158 sband = local->hw.wiphy->bands[conf->channel->band];
1159 buf_size = IEEE80211_MIN_AMPDU_BUF;
1160 buf_size = buf_size << sband->ht_info.ampdu_factor;
1163 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1165 /* examine state machine */
1166 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1168 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1169 #ifdef CONFIG_MAC80211_HT_DEBUG
1170 if (net_ratelimit())
1171 printk(KERN_DEBUG "unexpected Block Ack Req from "
1173 print_mac(mac, mgmt->sa), tid);
1174 #endif /* CONFIG_MAC80211_HT_DEBUG */
1178 /* prepare reordering buffer */
1179 tid_agg_rx->reorder_buf =
1180 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1181 if (!tid_agg_rx->reorder_buf) {
1182 if (net_ratelimit())
1183 printk(KERN_ERR "can not allocate reordering buffer "
1184 "to tid %d\n", tid);
1187 memset(tid_agg_rx->reorder_buf, 0,
1188 buf_size * sizeof(struct sk_buf *));
1190 if (local->ops->ampdu_action)
1191 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1192 sta->addr, tid, &start_seq_num);
1193 #ifdef CONFIG_MAC80211_HT_DEBUG
1194 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1195 #endif /* CONFIG_MAC80211_HT_DEBUG */
1198 kfree(tid_agg_rx->reorder_buf);
1202 /* change state and send addba resp */
1203 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1204 tid_agg_rx->dialog_token = dialog_token;
1205 tid_agg_rx->ssn = start_seq_num;
1206 tid_agg_rx->head_seq_num = start_seq_num;
1207 tid_agg_rx->buf_size = buf_size;
1208 tid_agg_rx->timeout = timeout;
1209 tid_agg_rx->stored_mpdu_num = 0;
1210 status = WLAN_STATUS_SUCCESS;
1212 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1215 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1216 status, 1, buf_size, timeout);
1220 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1221 struct ieee80211_mgmt *mgmt,
1224 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1225 struct ieee80211_hw *hw = &local->hw;
1226 struct sta_info *sta;
1231 sta = sta_info_get(local, mgmt->sa);
1235 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1236 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1238 state = &sta->ampdu_mlme.tid_tx[tid].state;
1240 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1242 if (mgmt->u.action.u.addba_resp.dialog_token !=
1243 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1244 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1245 #ifdef CONFIG_MAC80211_HT_DEBUG
1246 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1247 #endif /* CONFIG_MAC80211_HT_DEBUG */
1252 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1253 #ifdef CONFIG_MAC80211_HT_DEBUG
1254 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1255 #endif /* CONFIG_MAC80211_HT_DEBUG */
1256 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1257 == WLAN_STATUS_SUCCESS) {
1258 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1259 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1260 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1266 if (*state & HT_ADDBA_RECEIVED_MSK)
1267 printk(KERN_DEBUG "double addBA response\n");
1269 *state |= HT_ADDBA_RECEIVED_MSK;
1270 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1272 if (*state == HT_AGG_STATE_OPERATIONAL) {
1273 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1274 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1277 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1278 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1280 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1282 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1283 /* this will allow the state check in stop_BA_session */
1284 *state = HT_AGG_STATE_OPERATIONAL;
1285 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1286 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1287 WLAN_BACK_INITIATOR);
1292 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1293 u16 initiator, u16 reason_code)
1295 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1296 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1297 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1298 struct sk_buff *skb;
1299 struct ieee80211_mgmt *mgmt;
1302 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1303 sizeof(mgmt->u.action.u.delba));
1306 printk(KERN_ERR "%s: failed to allocate buffer "
1307 "for delba frame\n", dev->name);
1311 skb_reserve(skb, local->hw.extra_tx_headroom);
1312 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1313 memset(mgmt, 0, 24);
1314 memcpy(mgmt->da, da, ETH_ALEN);
1315 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1316 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1317 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1319 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1320 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1321 IEEE80211_STYPE_ACTION);
1323 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1325 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1326 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1327 params = (u16)(initiator << 11); /* bit 11 initiator */
1328 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1330 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1331 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1333 ieee80211_sta_tx(dev, skb, 0);
1336 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1337 u16 initiator, u16 reason)
1339 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1340 struct ieee80211_hw *hw = &local->hw;
1341 struct sta_info *sta;
1344 sta = sta_info_get(local, ra);
1348 /* check if TID is in operational state */
1349 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1350 if (sta->ampdu_mlme.tid_rx[tid].state
1351 != HT_AGG_STATE_OPERATIONAL) {
1352 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1356 sta->ampdu_mlme.tid_rx[tid].state =
1357 HT_AGG_STATE_REQ_STOP_BA_MSK |
1358 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1359 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1361 /* stop HW Rx aggregation. ampdu_action existence
1362 * already verified in session init so we add the BUG_ON */
1363 BUG_ON(!local->ops->ampdu_action);
1365 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1368 printk(KERN_DEBUG "HW problem - can not stop rx "
1369 "aggergation for tid %d\n", tid);
1371 /* shutdown timer has not expired */
1372 if (initiator != WLAN_BACK_TIMER)
1373 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1376 /* check if this is a self generated aggregation halt */
1377 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1378 ieee80211_send_delba(dev, ra, tid, 0, reason);
1380 /* free the reordering buffer */
1381 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1382 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1383 /* release the reordered frames */
1384 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1385 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1386 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1389 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1391 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1396 static void ieee80211_sta_process_delba(struct net_device *dev,
1397 struct ieee80211_mgmt *mgmt, size_t len)
1399 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1400 struct sta_info *sta;
1403 DECLARE_MAC_BUF(mac);
1405 sta = sta_info_get(local, mgmt->sa);
1409 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1410 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1411 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1413 #ifdef CONFIG_MAC80211_HT_DEBUG
1414 if (net_ratelimit())
1415 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1416 print_mac(mac, mgmt->sa),
1417 initiator ? "recipient" : "initiator", tid,
1418 mgmt->u.action.u.delba.reason_code);
1419 #endif /* CONFIG_MAC80211_HT_DEBUG */
1421 if (initiator == WLAN_BACK_INITIATOR)
1422 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1423 WLAN_BACK_INITIATOR, 0);
1424 else { /* WLAN_BACK_RECIPIENT */
1425 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1426 sta->ampdu_mlme.tid_tx[tid].state =
1427 HT_AGG_STATE_OPERATIONAL;
1428 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1429 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1430 WLAN_BACK_RECIPIENT);
1436 * After sending add Block Ack request we activated a timer until
1437 * add Block Ack response will arrive from the recipient.
1438 * If this timer expires sta_addba_resp_timer_expired will be executed.
1440 void sta_addba_resp_timer_expired(unsigned long data)
1442 /* not an elegant detour, but there is no choice as the timer passes
1443 * only one argument, and both sta_info and TID are needed, so init
1444 * flow in sta_info_add gives the TID as data, while the timer_to_id
1445 * array gives the sta through container_of */
1446 u16 tid = *(int *)data;
1447 struct sta_info *temp_sta = container_of((void *)data,
1448 struct sta_info, timer_to_tid[tid]);
1450 struct ieee80211_local *local = temp_sta->local;
1451 struct ieee80211_hw *hw = &local->hw;
1452 struct sta_info *sta;
1455 sta = sta_info_get(local, temp_sta->addr);
1459 state = &sta->ampdu_mlme.tid_tx[tid].state;
1460 /* check if the TID waits for addBA response */
1461 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1462 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1463 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1464 *state = HT_AGG_STATE_IDLE;
1465 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1466 "expecting addBA response there", tid);
1467 goto timer_expired_exit;
1470 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1472 /* go through the state check in stop_BA_session */
1473 *state = HT_AGG_STATE_OPERATIONAL;
1474 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1475 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1476 WLAN_BACK_INITIATOR);
1483 * After receiving Block Ack Request (BAR) we activated a
1484 * timer after each frame arrives from the originator.
1485 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1487 void sta_rx_agg_session_timer_expired(unsigned long data)
1489 /* not an elegant detour, but there is no choice as the timer passes
1490 * only one argument, and verious sta_info are needed here, so init
1491 * flow in sta_info_add gives the TID as data, while the timer_to_id
1492 * array gives the sta through container_of */
1493 u8 *ptid = (u8 *)data;
1494 u8 *timer_to_id = ptid - *ptid;
1495 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1498 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1499 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1501 WLAN_REASON_QSTA_TIMEOUT);
1505 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1506 struct ieee80211_if_sta *ifsta,
1507 struct ieee80211_mgmt *mgmt,
1510 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1511 u16 auth_alg, auth_transaction, status_code;
1512 DECLARE_MAC_BUF(mac);
1514 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1515 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1516 printk(KERN_DEBUG "%s: authentication frame received from "
1517 "%s, but not in authenticate state - ignored\n",
1518 dev->name, print_mac(mac, mgmt->sa));
1523 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1524 "received from %s - ignored\n",
1525 dev->name, len, print_mac(mac, mgmt->sa));
1529 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1530 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1531 printk(KERN_DEBUG "%s: authentication frame received from "
1532 "unknown AP (SA=%s BSSID=%s) - "
1533 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1534 print_mac(mac, mgmt->bssid));
1538 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1539 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1540 printk(KERN_DEBUG "%s: authentication frame received from "
1541 "unknown BSSID (SA=%s BSSID=%s) - "
1542 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1543 print_mac(mac, mgmt->bssid));
1547 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1548 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1549 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1551 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1552 "transaction=%d status=%d)\n",
1553 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1554 auth_transaction, status_code);
1556 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1557 /* IEEE 802.11 standard does not require authentication in IBSS
1558 * networks and most implementations do not seem to use it.
1559 * However, try to reply to authentication attempts if someone
1560 * has actually implemented this.
1561 * TODO: Could implement shared key authentication. */
1562 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1563 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1564 "frame (alg=%d transaction=%d)\n",
1565 dev->name, auth_alg, auth_transaction);
1568 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1571 if (auth_alg != ifsta->auth_alg ||
1572 auth_transaction != ifsta->auth_transaction) {
1573 printk(KERN_DEBUG "%s: unexpected authentication frame "
1574 "(alg=%d transaction=%d)\n",
1575 dev->name, auth_alg, auth_transaction);
1579 if (status_code != WLAN_STATUS_SUCCESS) {
1580 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1581 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1582 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1584 const int num_algs = ARRAY_SIZE(algs);
1586 algs[0] = algs[1] = algs[2] = 0xff;
1587 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1588 algs[0] = WLAN_AUTH_OPEN;
1589 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1590 algs[1] = WLAN_AUTH_SHARED_KEY;
1591 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1592 algs[2] = WLAN_AUTH_LEAP;
1593 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1595 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1599 for (i = 0; i < num_algs; i++) {
1601 if (pos >= num_algs)
1603 if (algs[pos] == ifsta->auth_alg ||
1606 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1607 !ieee80211_sta_wep_configured(dev))
1609 ifsta->auth_alg = algs[pos];
1610 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1612 dev->name, ifsta->auth_alg);
1619 switch (ifsta->auth_alg) {
1620 case WLAN_AUTH_OPEN:
1621 case WLAN_AUTH_LEAP:
1622 ieee80211_auth_completed(dev, ifsta);
1624 case WLAN_AUTH_SHARED_KEY:
1625 if (ifsta->auth_transaction == 4)
1626 ieee80211_auth_completed(dev, ifsta);
1628 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1634 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1635 struct ieee80211_if_sta *ifsta,
1636 struct ieee80211_mgmt *mgmt,
1640 DECLARE_MAC_BUF(mac);
1643 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1644 "received from %s - ignored\n",
1645 dev->name, len, print_mac(mac, mgmt->sa));
1649 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1650 printk(KERN_DEBUG "%s: deauthentication frame received from "
1651 "unknown AP (SA=%s BSSID=%s) - "
1652 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1653 print_mac(mac, mgmt->bssid));
1657 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1659 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1661 dev->name, print_mac(mac, mgmt->sa), reason_code);
1663 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1664 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1667 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1668 ifsta->state == IEEE80211_ASSOCIATE ||
1669 ifsta->state == IEEE80211_ASSOCIATED) {
1670 ifsta->state = IEEE80211_AUTHENTICATE;
1671 mod_timer(&ifsta->timer, jiffies +
1672 IEEE80211_RETRY_AUTH_INTERVAL);
1675 ieee80211_set_disassoc(dev, ifsta, 1);
1676 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1680 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1681 struct ieee80211_if_sta *ifsta,
1682 struct ieee80211_mgmt *mgmt,
1686 DECLARE_MAC_BUF(mac);
1689 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1690 "received from %s - ignored\n",
1691 dev->name, len, print_mac(mac, mgmt->sa));
1695 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1696 printk(KERN_DEBUG "%s: disassociation frame received from "
1697 "unknown AP (SA=%s BSSID=%s) - "
1698 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1699 print_mac(mac, mgmt->bssid));
1703 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1705 printk(KERN_DEBUG "%s: RX disassociation from %s"
1707 dev->name, print_mac(mac, mgmt->sa), reason_code);
1709 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1710 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1712 if (ifsta->state == IEEE80211_ASSOCIATED) {
1713 ifsta->state = IEEE80211_ASSOCIATE;
1714 mod_timer(&ifsta->timer, jiffies +
1715 IEEE80211_RETRY_AUTH_INTERVAL);
1718 ieee80211_set_disassoc(dev, ifsta, 0);
1722 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1723 struct ieee80211_if_sta *ifsta,
1724 struct ieee80211_mgmt *mgmt,
1728 struct ieee80211_local *local = sdata->local;
1729 struct net_device *dev = sdata->dev;
1730 struct ieee80211_supported_band *sband;
1731 struct sta_info *sta;
1732 u64 rates, basic_rates;
1733 u16 capab_info, status_code, aid;
1734 struct ieee802_11_elems elems;
1735 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1738 DECLARE_MAC_BUF(mac);
1739 bool have_higher_than_11mbit = false;
1741 /* AssocResp and ReassocResp have identical structure, so process both
1742 * of them in this function. */
1744 if (ifsta->state != IEEE80211_ASSOCIATE) {
1745 printk(KERN_DEBUG "%s: association frame received from "
1746 "%s, but not in associate state - ignored\n",
1747 dev->name, print_mac(mac, mgmt->sa));
1752 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1753 "received from %s - ignored\n",
1754 dev->name, len, print_mac(mac, mgmt->sa));
1758 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1759 printk(KERN_DEBUG "%s: association frame received from "
1760 "unknown AP (SA=%s BSSID=%s) - "
1761 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1762 print_mac(mac, mgmt->bssid));
1766 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1767 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1768 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1770 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1771 "status=%d aid=%d)\n",
1772 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1773 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1775 if (status_code != WLAN_STATUS_SUCCESS) {
1776 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1777 dev->name, status_code);
1778 /* if this was a reassociation, ensure we try a "full"
1779 * association next time. This works around some broken APs
1780 * which do not correctly reject reassociation requests. */
1781 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1785 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1786 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1787 "set\n", dev->name, aid);
1788 aid &= ~(BIT(15) | BIT(14));
1790 pos = mgmt->u.assoc_resp.variable;
1791 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1793 if (!elems.supp_rates) {
1794 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1799 printk(KERN_DEBUG "%s: associated\n", dev->name);
1801 ifsta->ap_capab = capab_info;
1803 kfree(ifsta->assocresp_ies);
1804 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1805 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1806 if (ifsta->assocresp_ies)
1807 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1809 /* Add STA entry for the AP */
1810 sta = sta_info_get(local, ifsta->bssid);
1812 struct ieee80211_sta_bss *bss;
1813 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1815 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1816 " AP\n", dev->name);
1819 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1820 local->hw.conf.channel->center_freq,
1821 ifsta->ssid, ifsta->ssid_len);
1823 sta->last_rssi = bss->rssi;
1824 sta->last_signal = bss->signal;
1825 sta->last_noise = bss->noise;
1826 ieee80211_rx_bss_put(dev, bss);
1831 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1832 WLAN_STA_AUTHORIZED;
1836 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1838 for (i = 0; i < elems.supp_rates_len; i++) {
1839 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1842 have_higher_than_11mbit = true;
1844 for (j = 0; j < sband->n_bitrates; j++) {
1845 if (sband->bitrates[j].bitrate == rate)
1847 if (elems.supp_rates[i] & 0x80)
1848 basic_rates |= BIT(j);
1852 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1853 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1856 have_higher_than_11mbit = true;
1858 for (j = 0; j < sband->n_bitrates; j++) {
1859 if (sband->bitrates[j].bitrate == rate)
1861 if (elems.ext_supp_rates[i] & 0x80)
1862 basic_rates |= BIT(j);
1866 sta->supp_rates[local->hw.conf.channel->band] = rates;
1867 sdata->basic_rates = basic_rates;
1869 /* cf. IEEE 802.11 9.2.12 */
1870 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1871 have_higher_than_11mbit)
1872 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1874 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1876 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1877 local->ops->conf_ht) {
1878 struct ieee80211_ht_bss_info bss_info;
1880 ieee80211_ht_cap_ie_to_ht_info(
1881 (struct ieee80211_ht_cap *)
1882 elems.ht_cap_elem, &sta->ht_info);
1883 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1884 (struct ieee80211_ht_addt_info *)
1885 elems.ht_info_elem, &bss_info);
1886 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1889 rate_control_rate_init(sta, local);
1891 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1892 sta->flags |= WLAN_STA_WME;
1893 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1894 elems.wmm_param_len);
1897 /* set AID, ieee80211_set_associated() will tell the driver */
1898 bss_conf->aid = aid;
1899 ieee80211_set_associated(dev, ifsta, 1);
1903 ieee80211_associated(dev, ifsta);
1907 /* Caller must hold local->sta_bss_lock */
1908 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1909 struct ieee80211_sta_bss *bss)
1911 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1912 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1913 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1917 /* Caller must hold local->sta_bss_lock */
1918 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1919 struct ieee80211_sta_bss *bss)
1921 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1922 struct ieee80211_sta_bss *b, *prev = NULL;
1923 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1927 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1930 prev->hnext = bss->hnext;
1939 static struct ieee80211_sta_bss *
1940 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1941 u8 *ssid, u8 ssid_len)
1943 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1944 struct ieee80211_sta_bss *bss;
1946 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1949 atomic_inc(&bss->users);
1950 atomic_inc(&bss->users);
1951 memcpy(bss->bssid, bssid, ETH_ALEN);
1953 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1954 memcpy(bss->ssid, ssid, ssid_len);
1955 bss->ssid_len = ssid_len;
1958 spin_lock_bh(&local->sta_bss_lock);
1959 /* TODO: order by RSSI? */
1960 list_add_tail(&bss->list, &local->sta_bss_list);
1961 __ieee80211_rx_bss_hash_add(dev, bss);
1962 spin_unlock_bh(&local->sta_bss_lock);
1967 static struct ieee80211_sta_bss *
1968 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1969 u8 *ssid, u8 ssid_len)
1971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1972 struct ieee80211_sta_bss *bss;
1974 spin_lock_bh(&local->sta_bss_lock);
1975 bss = local->sta_bss_hash[STA_HASH(bssid)];
1977 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1978 bss->freq == freq &&
1979 bss->ssid_len == ssid_len &&
1980 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1981 atomic_inc(&bss->users);
1986 spin_unlock_bh(&local->sta_bss_lock);
1991 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2001 static void ieee80211_rx_bss_put(struct net_device *dev,
2002 struct ieee80211_sta_bss *bss)
2004 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2005 if (!atomic_dec_and_test(&bss->users))
2008 spin_lock_bh(&local->sta_bss_lock);
2009 __ieee80211_rx_bss_hash_del(dev, bss);
2010 list_del(&bss->list);
2011 spin_unlock_bh(&local->sta_bss_lock);
2012 ieee80211_rx_bss_free(bss);
2016 void ieee80211_rx_bss_list_init(struct net_device *dev)
2018 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2019 spin_lock_init(&local->sta_bss_lock);
2020 INIT_LIST_HEAD(&local->sta_bss_list);
2024 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2026 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2027 struct ieee80211_sta_bss *bss, *tmp;
2029 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2030 ieee80211_rx_bss_put(dev, bss);
2034 static void ieee80211_rx_bss_info(struct net_device *dev,
2035 struct ieee80211_mgmt *mgmt,
2037 struct ieee80211_rx_status *rx_status,
2040 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2041 struct ieee802_11_elems elems;
2044 struct ieee80211_sta_bss *bss;
2045 struct sta_info *sta;
2046 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2048 DECLARE_MAC_BUF(mac);
2049 DECLARE_MAC_BUF(mac2);
2051 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2052 return; /* ignore ProbeResp to foreign address */
2055 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2056 dev->name, beacon ? "Beacon" : "Probe Response",
2057 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2060 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2064 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2066 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2067 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2068 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2069 static unsigned long last_tsf_debug = 0;
2071 if (local->ops->get_tsf)
2072 tsf = local->ops->get_tsf(local_to_hw(local));
2075 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2076 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2077 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2079 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2080 (unsigned long long)tsf,
2081 (unsigned long long)timestamp,
2082 (unsigned long long)(tsf - timestamp),
2084 last_tsf_debug = jiffies;
2086 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2089 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2091 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2092 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2093 (sta = sta_info_get(local, mgmt->sa))) {
2094 struct ieee80211_supported_band *sband;
2095 struct ieee80211_rate *bitrates;
2097 u64 supp_rates, prev_rates;
2100 sband = local->hw.wiphy->bands[rx_status->band];
2104 sband = local->hw.wiphy->bands[
2105 local->hw.conf.channel->band];
2108 bitrates = sband->bitrates;
2109 num_rates = sband->n_bitrates;
2112 for (i = 0; i < elems.supp_rates_len +
2113 elems.ext_supp_rates_len; i++) {
2116 if (i < elems.supp_rates_len)
2117 rate = elems.supp_rates[i];
2118 else if (elems.ext_supp_rates)
2119 rate = elems.ext_supp_rates
2120 [i - elems.supp_rates_len];
2121 own_rate = 5 * (rate & 0x7f);
2122 for (j = 0; j < num_rates; j++)
2123 if (bitrates[j].bitrate == own_rate)
2124 supp_rates |= BIT(j);
2127 prev_rates = sta->supp_rates[rx_status->band];
2128 sta->supp_rates[rx_status->band] &= supp_rates;
2129 if (sta->supp_rates[rx_status->band] == 0) {
2130 /* No matching rates - this should not really happen.
2131 * Make sure that at least one rate is marked
2132 * supported to avoid issues with TX rate ctrl. */
2133 sta->supp_rates[rx_status->band] =
2134 sdata->u.sta.supp_rates_bits[rx_status->band];
2136 if (sta->supp_rates[rx_status->band] != prev_rates) {
2137 printk(KERN_DEBUG "%s: updated supp_rates set for "
2138 "%s based on beacon info (0x%llx & 0x%llx -> "
2140 dev->name, print_mac(mac, sta->addr),
2141 (unsigned long long) prev_rates,
2142 (unsigned long long) supp_rates,
2143 (unsigned long long) sta->supp_rates[rx_status->band]);
2151 if (elems.ds_params && elems.ds_params_len == 1)
2152 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2154 freq = rx_status->freq;
2156 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2157 elems.ssid, elems.ssid_len);
2159 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2160 elems.ssid, elems.ssid_len);
2165 /* TODO: order by RSSI? */
2166 spin_lock_bh(&local->sta_bss_lock);
2167 list_move_tail(&bss->list, &local->sta_bss_list);
2168 spin_unlock_bh(&local->sta_bss_lock);
2172 bss->band = rx_status->band;
2174 if (bss->probe_resp && beacon) {
2175 /* Do not allow beacon to override data from Probe Response. */
2176 ieee80211_rx_bss_put(dev, bss);
2180 /* save the ERP value so that it is available at association time */
2181 if (elems.erp_info && elems.erp_info_len >= 1) {
2182 bss->erp_value = elems.erp_info[0];
2183 bss->has_erp_value = 1;
2186 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2187 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2189 bss->supp_rates_len = 0;
2190 if (elems.supp_rates) {
2191 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2192 if (clen > elems.supp_rates_len)
2193 clen = elems.supp_rates_len;
2194 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2196 bss->supp_rates_len += clen;
2198 if (elems.ext_supp_rates) {
2199 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2200 if (clen > elems.ext_supp_rates_len)
2201 clen = elems.ext_supp_rates_len;
2202 memcpy(&bss->supp_rates[bss->supp_rates_len],
2203 elems.ext_supp_rates, clen);
2204 bss->supp_rates_len += clen;
2208 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2209 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2211 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2213 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2214 bss->wpa_ie_len = elems.wpa_len + 2;
2216 bss->wpa_ie_len = 0;
2217 } else if (!elems.wpa && bss->wpa_ie) {
2220 bss->wpa_ie_len = 0;
2224 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2225 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2227 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2229 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2230 bss->rsn_ie_len = elems.rsn_len + 2;
2232 bss->rsn_ie_len = 0;
2233 } else if (!elems.rsn && bss->rsn_ie) {
2236 bss->rsn_ie_len = 0;
2239 if (elems.wmm_param &&
2240 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2241 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2243 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2245 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2246 elems.wmm_param_len + 2);
2247 bss->wmm_ie_len = elems.wmm_param_len + 2;
2249 bss->wmm_ie_len = 0;
2250 } else if (!elems.wmm_param && bss->wmm_ie) {
2253 bss->wmm_ie_len = 0;
2255 if (elems.ht_cap_elem &&
2256 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2257 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2259 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2261 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2262 elems.ht_cap_elem_len + 2);
2263 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2266 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2272 bss->timestamp = timestamp;
2273 bss->last_update = jiffies;
2274 bss->rssi = rx_status->ssi;
2275 bss->signal = rx_status->signal;
2276 bss->noise = rx_status->noise;
2279 ieee80211_rx_bss_put(dev, bss);
2283 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2284 struct ieee80211_mgmt *mgmt,
2286 struct ieee80211_rx_status *rx_status)
2288 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2292 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2293 struct ieee80211_mgmt *mgmt,
2295 struct ieee80211_rx_status *rx_status)
2297 struct ieee80211_sub_if_data *sdata;
2298 struct ieee80211_if_sta *ifsta;
2300 struct ieee802_11_elems elems;
2301 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2302 struct ieee80211_conf *conf = &local->hw.conf;
2305 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2307 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2308 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2310 ifsta = &sdata->u.sta;
2312 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2313 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2316 /* Process beacon from the current BSS */
2317 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2321 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2323 if (elems.erp_info && elems.erp_info_len >= 1)
2324 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2326 if (elems.ht_cap_elem && elems.ht_info_elem &&
2327 elems.wmm_param && local->ops->conf_ht &&
2328 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2329 struct ieee80211_ht_bss_info bss_info;
2331 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2332 (struct ieee80211_ht_addt_info *)
2333 elems.ht_info_elem, &bss_info);
2334 /* check if AP changed bss inforamation */
2335 if ((conf->ht_bss_conf.primary_channel !=
2336 bss_info.primary_channel) ||
2337 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2338 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2339 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2343 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2344 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2345 elems.wmm_param_len);
2348 ieee80211_bss_info_change_notify(sdata, changed);
2352 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2353 struct ieee80211_if_sta *ifsta,
2354 struct ieee80211_mgmt *mgmt,
2356 struct ieee80211_rx_status *rx_status)
2358 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2359 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2361 struct sk_buff *skb;
2362 struct ieee80211_mgmt *resp;
2364 DECLARE_MAC_BUF(mac);
2365 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2366 DECLARE_MAC_BUF(mac2);
2367 DECLARE_MAC_BUF(mac3);
2370 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2371 ifsta->state != IEEE80211_IBSS_JOINED ||
2372 len < 24 + 2 || !ifsta->probe_resp)
2375 if (local->ops->tx_last_beacon)
2376 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2380 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2381 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2382 "%s (tx_last_beacon=%d)\n",
2383 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2384 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2385 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2387 if (!tx_last_beacon)
2390 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2391 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2394 end = ((u8 *) mgmt) + len;
2395 pos = mgmt->u.probe_req.variable;
2396 if (pos[0] != WLAN_EID_SSID ||
2397 pos + 2 + pos[1] > end) {
2398 if (net_ratelimit()) {
2399 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2401 dev->name, print_mac(mac, mgmt->sa));
2406 (pos[1] != ifsta->ssid_len ||
2407 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2408 /* Ignore ProbeReq for foreign SSID */
2412 /* Reply with ProbeResp */
2413 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2417 resp = (struct ieee80211_mgmt *) skb->data;
2418 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2419 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2420 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2421 dev->name, print_mac(mac, resp->da));
2422 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2423 ieee80211_sta_tx(dev, skb, 0);
2426 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2427 struct ieee80211_if_sta *ifsta,
2428 struct ieee80211_mgmt *mgmt,
2431 if (len < IEEE80211_MIN_ACTION_SIZE)
2434 switch (mgmt->u.action.category) {
2435 case WLAN_CATEGORY_BACK:
2436 switch (mgmt->u.action.u.addba_req.action_code) {
2437 case WLAN_ACTION_ADDBA_REQ:
2438 if (len < (IEEE80211_MIN_ACTION_SIZE +
2439 sizeof(mgmt->u.action.u.addba_req)))
2441 ieee80211_sta_process_addba_request(dev, mgmt, len);
2443 case WLAN_ACTION_ADDBA_RESP:
2444 if (len < (IEEE80211_MIN_ACTION_SIZE +
2445 sizeof(mgmt->u.action.u.addba_resp)))
2447 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2449 case WLAN_ACTION_DELBA:
2450 if (len < (IEEE80211_MIN_ACTION_SIZE +
2451 sizeof(mgmt->u.action.u.delba)))
2453 ieee80211_sta_process_delba(dev, mgmt, len);
2456 if (net_ratelimit())
2457 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2467 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2468 struct ieee80211_rx_status *rx_status)
2470 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2471 struct ieee80211_sub_if_data *sdata;
2472 struct ieee80211_if_sta *ifsta;
2473 struct ieee80211_mgmt *mgmt;
2479 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2480 ifsta = &sdata->u.sta;
2482 mgmt = (struct ieee80211_mgmt *) skb->data;
2483 fc = le16_to_cpu(mgmt->frame_control);
2485 switch (fc & IEEE80211_FCTL_STYPE) {
2486 case IEEE80211_STYPE_PROBE_REQ:
2487 case IEEE80211_STYPE_PROBE_RESP:
2488 case IEEE80211_STYPE_BEACON:
2489 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2490 case IEEE80211_STYPE_AUTH:
2491 case IEEE80211_STYPE_ASSOC_RESP:
2492 case IEEE80211_STYPE_REASSOC_RESP:
2493 case IEEE80211_STYPE_DEAUTH:
2494 case IEEE80211_STYPE_DISASSOC:
2495 case IEEE80211_STYPE_ACTION:
2496 skb_queue_tail(&ifsta->skb_queue, skb);
2497 queue_work(local->hw.workqueue, &ifsta->work);
2500 printk(KERN_DEBUG "%s: received unknown management frame - "
2501 "stype=%d\n", dev->name,
2502 (fc & IEEE80211_FCTL_STYPE) >> 4);
2511 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2512 struct sk_buff *skb)
2514 struct ieee80211_rx_status *rx_status;
2515 struct ieee80211_sub_if_data *sdata;
2516 struct ieee80211_if_sta *ifsta;
2517 struct ieee80211_mgmt *mgmt;
2520 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2521 ifsta = &sdata->u.sta;
2523 rx_status = (struct ieee80211_rx_status *) skb->cb;
2524 mgmt = (struct ieee80211_mgmt *) skb->data;
2525 fc = le16_to_cpu(mgmt->frame_control);
2527 switch (fc & IEEE80211_FCTL_STYPE) {
2528 case IEEE80211_STYPE_PROBE_REQ:
2529 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2532 case IEEE80211_STYPE_PROBE_RESP:
2533 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2535 case IEEE80211_STYPE_BEACON:
2536 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2538 case IEEE80211_STYPE_AUTH:
2539 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2541 case IEEE80211_STYPE_ASSOC_RESP:
2542 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2544 case IEEE80211_STYPE_REASSOC_RESP:
2545 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2547 case IEEE80211_STYPE_DEAUTH:
2548 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2550 case IEEE80211_STYPE_DISASSOC:
2551 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2553 case IEEE80211_STYPE_ACTION:
2554 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2562 ieee80211_txrx_result
2563 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2564 struct ieee80211_rx_status *rx_status)
2566 struct ieee80211_mgmt *mgmt;
2572 mgmt = (struct ieee80211_mgmt *) skb->data;
2573 fc = le16_to_cpu(mgmt->frame_control);
2575 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2576 return TXRX_CONTINUE;
2581 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2582 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2583 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2584 skb->len, rx_status);
2587 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2588 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2594 return TXRX_CONTINUE;
2598 static int ieee80211_sta_active_ibss(struct net_device *dev)
2600 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2602 struct sta_info *sta;
2604 read_lock_bh(&local->sta_lock);
2605 list_for_each_entry(sta, &local->sta_list, list) {
2606 if (sta->dev == dev &&
2607 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2613 read_unlock_bh(&local->sta_lock);
2619 static void ieee80211_sta_expire(struct net_device *dev)
2621 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2622 struct sta_info *sta, *tmp;
2623 LIST_HEAD(tmp_list);
2624 DECLARE_MAC_BUF(mac);
2626 write_lock_bh(&local->sta_lock);
2627 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2628 if (time_after(jiffies, sta->last_rx +
2629 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2630 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2631 dev->name, print_mac(mac, sta->addr));
2632 __sta_info_get(sta);
2633 sta_info_remove(sta);
2634 list_add(&sta->list, &tmp_list);
2636 write_unlock_bh(&local->sta_lock);
2638 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2645 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2646 struct ieee80211_if_sta *ifsta)
2648 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2650 ieee80211_sta_expire(dev);
2651 if (ieee80211_sta_active_ibss(dev))
2654 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2655 "IBSS networks with same SSID (merge)\n", dev->name);
2656 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2660 void ieee80211_sta_timer(unsigned long data)
2662 struct ieee80211_sub_if_data *sdata =
2663 (struct ieee80211_sub_if_data *) data;
2664 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2665 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2667 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2668 queue_work(local->hw.workqueue, &ifsta->work);
2672 void ieee80211_sta_work(struct work_struct *work)
2674 struct ieee80211_sub_if_data *sdata =
2675 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2676 struct net_device *dev = sdata->dev;
2677 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2678 struct ieee80211_if_sta *ifsta;
2679 struct sk_buff *skb;
2681 if (!netif_running(dev))
2684 if (local->sta_sw_scanning || local->sta_hw_scanning)
2687 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2688 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2689 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2690 "(type=%d)\n", dev->name, sdata->vif.type);
2693 ifsta = &sdata->u.sta;
2695 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2696 ieee80211_sta_rx_queued_mgmt(dev, skb);
2698 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2699 ifsta->state != IEEE80211_ASSOCIATE &&
2700 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2701 if (ifsta->scan_ssid_len)
2702 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2704 ieee80211_sta_start_scan(dev, NULL, 0);
2708 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2709 if (ieee80211_sta_config_auth(dev, ifsta))
2711 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2712 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2715 switch (ifsta->state) {
2716 case IEEE80211_DISABLED:
2718 case IEEE80211_AUTHENTICATE:
2719 ieee80211_authenticate(dev, ifsta);
2721 case IEEE80211_ASSOCIATE:
2722 ieee80211_associate(dev, ifsta);
2724 case IEEE80211_ASSOCIATED:
2725 ieee80211_associated(dev, ifsta);
2727 case IEEE80211_IBSS_SEARCH:
2728 ieee80211_sta_find_ibss(dev, ifsta);
2730 case IEEE80211_IBSS_JOINED:
2731 ieee80211_sta_merge_ibss(dev, ifsta);
2734 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2739 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2740 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2741 "mixed-cell disabled - disassociate\n", dev->name);
2743 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2744 ieee80211_set_disassoc(dev, ifsta, 0);
2749 static void ieee80211_sta_reset_auth(struct net_device *dev,
2750 struct ieee80211_if_sta *ifsta)
2752 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2754 if (local->ops->reset_tsf) {
2755 /* Reset own TSF to allow time synchronization work. */
2756 local->ops->reset_tsf(local_to_hw(local));
2759 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2762 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2763 ifsta->auth_alg = WLAN_AUTH_OPEN;
2764 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2765 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2766 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2767 ifsta->auth_alg = WLAN_AUTH_LEAP;
2769 ifsta->auth_alg = WLAN_AUTH_OPEN;
2770 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2772 ifsta->auth_transaction = -1;
2773 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2774 ifsta->auth_tries = ifsta->assoc_tries = 0;
2775 netif_carrier_off(dev);
2779 void ieee80211_sta_req_auth(struct net_device *dev,
2780 struct ieee80211_if_sta *ifsta)
2782 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2783 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2785 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2788 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2789 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2790 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2791 IEEE80211_STA_AUTO_SSID_SEL))) {
2792 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2793 queue_work(local->hw.workqueue, &ifsta->work);
2797 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2798 const char *ssid, int ssid_len)
2800 int tmp, hidden_ssid;
2802 if (ssid_len == ifsta->ssid_len &&
2803 !memcmp(ifsta->ssid, ssid, ssid_len))
2806 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2812 if (ssid[tmp] != '\0') {
2818 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2821 if (ssid_len == 1 && ssid[0] == ' ')
2827 static int ieee80211_sta_config_auth(struct net_device *dev,
2828 struct ieee80211_if_sta *ifsta)
2830 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2831 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2832 struct ieee80211_sta_bss *bss, *selected = NULL;
2833 int top_rssi = 0, freq;
2835 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2836 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2837 ifsta->state = IEEE80211_AUTHENTICATE;
2838 ieee80211_sta_reset_auth(dev, ifsta);
2842 spin_lock_bh(&local->sta_bss_lock);
2843 freq = local->oper_channel->center_freq;
2844 list_for_each_entry(bss, &local->sta_bss_list, list) {
2845 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2848 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2849 !!sdata->default_key)
2852 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2856 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2857 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2860 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2861 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2864 if (!selected || top_rssi < bss->rssi) {
2866 top_rssi = bss->rssi;
2870 atomic_inc(&selected->users);
2871 spin_unlock_bh(&local->sta_bss_lock);
2874 ieee80211_set_freq(local, selected->freq);
2875 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2876 ieee80211_sta_set_ssid(dev, selected->ssid,
2877 selected->ssid_len);
2878 ieee80211_sta_set_bssid(dev, selected->bssid);
2879 ieee80211_rx_bss_put(dev, selected);
2880 ifsta->state = IEEE80211_AUTHENTICATE;
2881 ieee80211_sta_reset_auth(dev, ifsta);
2884 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2885 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2886 ieee80211_sta_start_scan(dev, NULL, 0);
2888 ieee80211_sta_start_scan(dev, ifsta->ssid,
2890 ifsta->state = IEEE80211_AUTHENTICATE;
2891 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2893 ifsta->state = IEEE80211_DISABLED;
2898 static int ieee80211_sta_join_ibss(struct net_device *dev,
2899 struct ieee80211_if_sta *ifsta,
2900 struct ieee80211_sta_bss *bss)
2902 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2903 int res, rates, i, j;
2904 struct sk_buff *skb;
2905 struct ieee80211_mgmt *mgmt;
2906 struct ieee80211_tx_control control;
2907 struct rate_selection ratesel;
2909 struct ieee80211_sub_if_data *sdata;
2910 struct ieee80211_supported_band *sband;
2912 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2914 /* Remove possible STA entries from other IBSS networks. */
2915 sta_info_flush(local, NULL);
2917 if (local->ops->reset_tsf) {
2918 /* Reset own TSF to allow time synchronization work. */
2919 local->ops->reset_tsf(local_to_hw(local));
2921 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2922 res = ieee80211_if_config(dev);
2926 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2928 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2929 sdata->drop_unencrypted = bss->capability &
2930 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2932 res = ieee80211_set_freq(local, bss->freq);
2934 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2935 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2936 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2940 /* Set beacon template based on scan results */
2941 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2946 skb_reserve(skb, local->hw.extra_tx_headroom);
2948 mgmt = (struct ieee80211_mgmt *)
2949 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2950 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2951 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2952 IEEE80211_STYPE_BEACON);
2953 memset(mgmt->da, 0xff, ETH_ALEN);
2954 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2955 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2956 mgmt->u.beacon.beacon_int =
2957 cpu_to_le16(local->hw.conf.beacon_int);
2958 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2960 pos = skb_put(skb, 2 + ifsta->ssid_len);
2961 *pos++ = WLAN_EID_SSID;
2962 *pos++ = ifsta->ssid_len;
2963 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2965 rates = bss->supp_rates_len;
2968 pos = skb_put(skb, 2 + rates);
2969 *pos++ = WLAN_EID_SUPP_RATES;
2971 memcpy(pos, bss->supp_rates, rates);
2973 if (bss->band == IEEE80211_BAND_2GHZ) {
2974 pos = skb_put(skb, 2 + 1);
2975 *pos++ = WLAN_EID_DS_PARAMS;
2977 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2980 pos = skb_put(skb, 2 + 2);
2981 *pos++ = WLAN_EID_IBSS_PARAMS;
2983 /* FIX: set ATIM window based on scan results */
2987 if (bss->supp_rates_len > 8) {
2988 rates = bss->supp_rates_len - 8;
2989 pos = skb_put(skb, 2 + rates);
2990 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2992 memcpy(pos, &bss->supp_rates[8], rates);
2995 memset(&control, 0, sizeof(control));
2996 rate_control_get_rate(dev, sband, skb, &ratesel);
2997 if (!ratesel.rate) {
2998 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2999 "for IBSS beacon\n", dev->name);
3002 control.vif = &sdata->vif;
3003 control.tx_rate = ratesel.rate;
3004 if (sdata->bss_conf.use_short_preamble &&
3005 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
3006 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
3007 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
3008 control.flags |= IEEE80211_TXCTL_NO_ACK;
3009 control.retry_limit = 1;
3011 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
3012 if (ifsta->probe_resp) {
3013 mgmt = (struct ieee80211_mgmt *)
3014 ifsta->probe_resp->data;
3015 mgmt->frame_control =
3016 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
3017 IEEE80211_STYPE_PROBE_RESP);
3019 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
3020 "template for IBSS\n", dev->name);
3023 if (local->ops->beacon_update &&
3024 local->ops->beacon_update(local_to_hw(local),
3025 skb, &control) == 0) {
3026 printk(KERN_DEBUG "%s: Configured IBSS beacon "
3027 "template based on scan results\n", dev->name);
3032 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
3033 for (i = 0; i < bss->supp_rates_len; i++) {
3034 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3035 for (j = 0; j < sband->n_bitrates; j++)
3036 if (sband->bitrates[j].bitrate == bitrate)
3039 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
3043 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3044 "template\n", dev->name);
3048 ifsta->state = IEEE80211_IBSS_JOINED;
3049 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3051 ieee80211_rx_bss_put(dev, bss);
3057 static int ieee80211_sta_create_ibss(struct net_device *dev,
3058 struct ieee80211_if_sta *ifsta)
3060 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3061 struct ieee80211_sta_bss *bss;
3062 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3063 struct ieee80211_supported_band *sband;
3064 u8 bssid[ETH_ALEN], *pos;
3066 DECLARE_MAC_BUF(mac);
3069 /* Easier testing, use fixed BSSID. */
3070 memset(bssid, 0xfe, ETH_ALEN);
3072 /* Generate random, not broadcast, locally administered BSSID. Mix in
3073 * own MAC address to make sure that devices that do not have proper
3074 * random number generator get different BSSID. */
3075 get_random_bytes(bssid, ETH_ALEN);
3076 for (i = 0; i < ETH_ALEN; i++)
3077 bssid[i] ^= dev->dev_addr[i];
3082 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3083 dev->name, print_mac(mac, bssid));
3085 bss = ieee80211_rx_bss_add(dev, bssid,
3086 local->hw.conf.channel->center_freq,
3087 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3091 bss->band = local->hw.conf.channel->band;
3092 sband = local->hw.wiphy->bands[bss->band];
3094 if (local->hw.conf.beacon_int == 0)
3095 local->hw.conf.beacon_int = 100;
3096 bss->beacon_int = local->hw.conf.beacon_int;
3097 bss->last_update = jiffies;
3098 bss->capability = WLAN_CAPABILITY_IBSS;
3099 if (sdata->default_key) {
3100 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3102 sdata->drop_unencrypted = 0;
3103 bss->supp_rates_len = sband->n_bitrates;
3104 pos = bss->supp_rates;
3105 for (i = 0; i < sband->n_bitrates; i++) {
3106 int rate = sband->bitrates[i].bitrate;
3107 *pos++ = (u8) (rate / 5);
3110 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3114 static int ieee80211_sta_find_ibss(struct net_device *dev,
3115 struct ieee80211_if_sta *ifsta)
3117 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3118 struct ieee80211_sta_bss *bss;
3122 DECLARE_MAC_BUF(mac);
3123 DECLARE_MAC_BUF(mac2);
3125 if (ifsta->ssid_len == 0)
3128 active_ibss = ieee80211_sta_active_ibss(dev);
3129 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3130 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3131 dev->name, active_ibss);
3132 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3133 spin_lock_bh(&local->sta_bss_lock);
3134 list_for_each_entry(bss, &local->sta_bss_list, list) {
3135 if (ifsta->ssid_len != bss->ssid_len ||
3136 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3137 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3139 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3140 printk(KERN_DEBUG " bssid=%s found\n",
3141 print_mac(mac, bss->bssid));
3142 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3143 memcpy(bssid, bss->bssid, ETH_ALEN);
3145 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3148 spin_unlock_bh(&local->sta_bss_lock);
3150 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3151 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3152 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3153 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3154 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3155 (bss = ieee80211_rx_bss_get(dev, bssid,
3156 local->hw.conf.channel->center_freq,
3157 ifsta->ssid, ifsta->ssid_len))) {
3158 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3159 " based on configured SSID\n",
3160 dev->name, print_mac(mac, bssid));
3161 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3163 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3164 printk(KERN_DEBUG " did not try to join ibss\n");
3165 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3167 /* Selected IBSS not found in current scan results - try to scan */
3168 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3169 !ieee80211_sta_active_ibss(dev)) {
3170 mod_timer(&ifsta->timer, jiffies +
3171 IEEE80211_IBSS_MERGE_INTERVAL);
3172 } else if (time_after(jiffies, local->last_scan_completed +
3173 IEEE80211_SCAN_INTERVAL)) {
3174 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3175 "join\n", dev->name);
3176 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3178 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3179 int interval = IEEE80211_SCAN_INTERVAL;
3181 if (time_after(jiffies, ifsta->ibss_join_req +
3182 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3183 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3184 (!(local->oper_channel->flags &
3185 IEEE80211_CHAN_NO_IBSS)))
3186 return ieee80211_sta_create_ibss(dev, ifsta);
3187 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3188 printk(KERN_DEBUG "%s: IBSS not allowed on"
3189 " %d MHz\n", dev->name,
3190 local->hw.conf.channel->center_freq);
3193 /* No IBSS found - decrease scan interval and continue
3195 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3198 ifsta->state = IEEE80211_IBSS_SEARCH;
3199 mod_timer(&ifsta->timer, jiffies + interval);
3207 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3209 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3210 struct ieee80211_if_sta *ifsta;
3211 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3213 if (len > IEEE80211_MAX_SSID_LEN)
3216 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3218 if (local->ops->conf_tx) {
3219 struct ieee80211_tx_queue_params qparam;
3222 memset(&qparam, 0, sizeof(qparam));
3226 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3227 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3232 qparam.cw_max = 1023;
3233 qparam.burst_time = 0;
3235 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3236 local->ops->conf_tx(local_to_hw(local),
3237 i + IEEE80211_TX_QUEUE_DATA0,
3240 /* IBSS uses different parameters for Beacon sending */
3244 local->ops->conf_tx(local_to_hw(local),
3245 IEEE80211_TX_QUEUE_BEACON, &qparam);
3248 ifsta = &sdata->u.sta;
3250 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3251 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3252 memcpy(ifsta->ssid, ssid, len);
3253 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3254 ifsta->ssid_len = len;
3257 ifsta->flags |= IEEE80211_STA_SSID_SET;
3259 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3260 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3261 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3262 ifsta->ibss_join_req = jiffies;
3263 ifsta->state = IEEE80211_IBSS_SEARCH;
3264 return ieee80211_sta_find_ibss(dev, ifsta);
3270 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3272 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3273 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3274 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3275 *len = ifsta->ssid_len;
3280 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3282 struct ieee80211_sub_if_data *sdata;
3283 struct ieee80211_if_sta *ifsta;
3286 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3287 ifsta = &sdata->u.sta;
3289 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3290 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3291 res = ieee80211_if_config(dev);
3293 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3294 "the low-level driver\n", dev->name);
3299 if (is_valid_ether_addr(bssid))
3300 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3302 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3308 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3309 struct ieee80211_sub_if_data *sdata,
3312 struct sk_buff *skb;
3313 struct ieee80211_hdr *nullfunc;
3316 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3318 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3319 "frame\n", sdata->dev->name);
3322 skb_reserve(skb, local->hw.extra_tx_headroom);
3324 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3325 memset(nullfunc, 0, 24);
3326 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3327 IEEE80211_FCTL_TODS;
3329 fc |= IEEE80211_FCTL_PM;
3330 nullfunc->frame_control = cpu_to_le16(fc);
3331 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3332 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3333 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3335 ieee80211_sta_tx(sdata->dev, skb, 0);
3339 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3341 struct ieee80211_local *local = hw_to_local(hw);
3342 struct net_device *dev = local->scan_dev;
3343 struct ieee80211_sub_if_data *sdata;
3344 union iwreq_data wrqu;
3346 local->last_scan_completed = jiffies;
3347 memset(&wrqu, 0, sizeof(wrqu));
3348 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3350 if (local->sta_hw_scanning) {
3351 local->sta_hw_scanning = 0;
3355 local->sta_sw_scanning = 0;
3356 if (ieee80211_hw_config(local))
3357 printk(KERN_DEBUG "%s: failed to restore operational "
3358 "channel after scan\n", dev->name);
3361 netif_tx_lock_bh(local->mdev);
3362 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3363 local->ops->configure_filter(local_to_hw(local),
3364 FIF_BCN_PRBRESP_PROMISC,
3365 &local->filter_flags,
3366 local->mdev->mc_count,
3367 local->mdev->mc_list);
3369 netif_tx_unlock_bh(local->mdev);
3372 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3374 /* No need to wake the master device. */
3375 if (sdata->dev == local->mdev)
3378 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3379 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3380 ieee80211_send_nullfunc(local, sdata, 0);
3381 ieee80211_sta_timer((unsigned long)sdata);
3384 netif_wake_queue(sdata->dev);
3389 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3390 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3391 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3392 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3393 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3394 !ieee80211_sta_active_ibss(dev)))
3395 ieee80211_sta_find_ibss(dev, ifsta);
3398 EXPORT_SYMBOL(ieee80211_scan_completed);
3400 void ieee80211_sta_scan_work(struct work_struct *work)
3402 struct ieee80211_local *local =
3403 container_of(work, struct ieee80211_local, scan_work.work);
3404 struct net_device *dev = local->scan_dev;
3405 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3406 struct ieee80211_supported_band *sband;
3407 struct ieee80211_channel *chan;
3409 unsigned long next_delay = 0;
3411 if (!local->sta_sw_scanning)
3414 switch (local->scan_state) {
3415 case SCAN_SET_CHANNEL:
3417 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3418 * after we successfully scanned the last channel of the last
3419 * band (and the last band is supported by the hw)
3421 if (local->scan_band < IEEE80211_NUM_BANDS)
3422 sband = local->hw.wiphy->bands[local->scan_band];
3427 * If we are at an unsupported band and have more bands
3428 * left to scan, advance to the next supported one.
3430 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3432 sband = local->hw.wiphy->bands[local->scan_band];
3433 local->scan_channel_idx = 0;
3436 /* if no more bands/channels left, complete scan */
3437 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3438 ieee80211_scan_completed(local_to_hw(local));
3442 chan = &sband->channels[local->scan_channel_idx];
3444 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3445 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3446 chan->flags & IEEE80211_CHAN_NO_IBSS))
3450 local->scan_channel = chan;
3451 if (ieee80211_hw_config(local)) {
3452 printk(KERN_DEBUG "%s: failed to set freq to "
3453 "%d MHz for scan\n", dev->name,
3459 /* advance state machine to next channel/band */
3460 local->scan_channel_idx++;
3461 if (local->scan_channel_idx >= sband->n_channels) {
3463 * scan_band may end up == IEEE80211_NUM_BANDS, but
3464 * we'll catch that case above and complete the scan
3465 * if that is the case.
3468 local->scan_channel_idx = 0;
3474 next_delay = IEEE80211_PROBE_DELAY +
3475 usecs_to_jiffies(local->hw.channel_change_time);
3476 local->scan_state = SCAN_SEND_PROBE;
3478 case SCAN_SEND_PROBE:
3479 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3480 local->scan_state = SCAN_SET_CHANNEL;
3482 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3484 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3485 local->scan_ssid_len);
3486 next_delay = IEEE80211_CHANNEL_TIME;
3490 if (local->sta_sw_scanning)
3491 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3496 static int ieee80211_sta_start_scan(struct net_device *dev,
3497 u8 *ssid, size_t ssid_len)
3499 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3500 struct ieee80211_sub_if_data *sdata;
3502 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3505 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3506 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3509 * ScanType: ACTIVE, PASSIVE
3510 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3511 * a Probe frame during active scanning
3513 * MinChannelTime (>= ProbeDelay), in TU
3514 * MaxChannelTime: (>= MinChannelTime), in TU
3517 /* MLME-SCAN.confirm
3519 * ResultCode: SUCCESS, INVALID_PARAMETERS
3522 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3523 if (local->scan_dev == dev)
3528 if (local->ops->hw_scan) {
3529 int rc = local->ops->hw_scan(local_to_hw(local),
3532 local->sta_hw_scanning = 1;
3533 local->scan_dev = dev;
3538 local->sta_sw_scanning = 1;
3541 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3543 /* Don't stop the master interface, otherwise we can't transmit
3545 if (sdata->dev == local->mdev)
3548 netif_stop_queue(sdata->dev);
3549 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3550 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3551 ieee80211_send_nullfunc(local, sdata, 1);
3556 local->scan_ssid_len = ssid_len;
3557 memcpy(local->scan_ssid, ssid, ssid_len);
3559 local->scan_ssid_len = 0;
3560 local->scan_state = SCAN_SET_CHANNEL;
3561 local->scan_channel_idx = 0;
3562 local->scan_band = IEEE80211_BAND_2GHZ;
3563 local->scan_dev = dev;
3565 netif_tx_lock_bh(local->mdev);
3566 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3567 local->ops->configure_filter(local_to_hw(local),
3568 FIF_BCN_PRBRESP_PROMISC,
3569 &local->filter_flags,
3570 local->mdev->mc_count,
3571 local->mdev->mc_list);
3572 netif_tx_unlock_bh(local->mdev);
3574 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3575 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3576 IEEE80211_CHANNEL_TIME);
3582 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3584 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3585 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3586 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3588 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3589 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3591 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3592 if (local->scan_dev == dev)
3597 ifsta->scan_ssid_len = ssid_len;
3599 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3600 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3601 queue_work(local->hw.workqueue, &ifsta->work);
3606 ieee80211_sta_scan_result(struct net_device *dev,
3607 struct ieee80211_sta_bss *bss,
3608 char *current_ev, char *end_buf)
3610 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3611 struct iw_event iwe;
3613 if (time_after(jiffies,
3614 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3617 memset(&iwe, 0, sizeof(iwe));
3618 iwe.cmd = SIOCGIWAP;
3619 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3620 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3621 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3624 memset(&iwe, 0, sizeof(iwe));
3625 iwe.cmd = SIOCGIWESSID;
3626 iwe.u.data.length = bss->ssid_len;
3627 iwe.u.data.flags = 1;
3628 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3631 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3632 memset(&iwe, 0, sizeof(iwe));
3633 iwe.cmd = SIOCGIWMODE;
3634 if (bss->capability & WLAN_CAPABILITY_ESS)
3635 iwe.u.mode = IW_MODE_MASTER;
3637 iwe.u.mode = IW_MODE_ADHOC;
3638 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3642 memset(&iwe, 0, sizeof(iwe));
3643 iwe.cmd = SIOCGIWFREQ;
3644 iwe.u.freq.m = bss->freq;
3646 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3649 memset(&iwe, 0, sizeof(iwe));
3650 iwe.cmd = SIOCGIWFREQ;
3651 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3653 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3656 memset(&iwe, 0, sizeof(iwe));
3658 iwe.u.qual.qual = bss->signal;
3659 iwe.u.qual.level = bss->rssi;
3660 iwe.u.qual.noise = bss->noise;
3661 iwe.u.qual.updated = local->wstats_flags;
3662 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3665 memset(&iwe, 0, sizeof(iwe));
3666 iwe.cmd = SIOCGIWENCODE;
3667 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3668 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3670 iwe.u.data.flags = IW_ENCODE_DISABLED;
3671 iwe.u.data.length = 0;
3672 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3674 if (bss && bss->wpa_ie) {
3675 memset(&iwe, 0, sizeof(iwe));
3676 iwe.cmd = IWEVGENIE;
3677 iwe.u.data.length = bss->wpa_ie_len;
3678 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3682 if (bss && bss->rsn_ie) {
3683 memset(&iwe, 0, sizeof(iwe));
3684 iwe.cmd = IWEVGENIE;
3685 iwe.u.data.length = bss->rsn_ie_len;
3686 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3690 if (bss && bss->supp_rates_len > 0) {
3691 /* display all supported rates in readable format */
3692 char *p = current_ev + IW_EV_LCP_LEN;
3695 memset(&iwe, 0, sizeof(iwe));
3696 iwe.cmd = SIOCGIWRATE;
3697 /* Those two flags are ignored... */
3698 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3700 for (i = 0; i < bss->supp_rates_len; i++) {
3701 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3703 p = iwe_stream_add_value(current_ev, p,
3704 end_buf, &iwe, IW_EV_PARAM_LEN);
3711 buf = kmalloc(30, GFP_ATOMIC);
3713 memset(&iwe, 0, sizeof(iwe));
3714 iwe.cmd = IWEVCUSTOM;
3715 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3716 iwe.u.data.length = strlen(buf);
3717 current_ev = iwe_stream_add_point(current_ev, end_buf,
3727 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3729 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3730 char *current_ev = buf;
3731 char *end_buf = buf + len;
3732 struct ieee80211_sta_bss *bss;
3734 spin_lock_bh(&local->sta_bss_lock);
3735 list_for_each_entry(bss, &local->sta_bss_list, list) {
3736 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3737 spin_unlock_bh(&local->sta_bss_lock);
3740 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3743 spin_unlock_bh(&local->sta_bss_lock);
3744 return current_ev - buf;
3748 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3750 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3751 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3752 kfree(ifsta->extra_ie);
3754 ifsta->extra_ie = NULL;
3755 ifsta->extra_ie_len = 0;
3758 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3759 if (!ifsta->extra_ie) {
3760 ifsta->extra_ie_len = 0;
3763 memcpy(ifsta->extra_ie, ie, len);
3764 ifsta->extra_ie_len = len;
3769 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3770 struct sk_buff *skb, u8 *bssid,
3773 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3774 struct sta_info *sta;
3775 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3776 DECLARE_MAC_BUF(mac);
3778 /* TODO: Could consider removing the least recently used entry and
3779 * allow new one to be added. */
3780 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3781 if (net_ratelimit()) {
3782 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3783 "entry %s\n", dev->name, print_mac(mac, addr));
3788 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3789 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3791 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3795 sta->flags |= WLAN_STA_AUTHORIZED;
3797 sta->supp_rates[local->hw.conf.channel->band] =
3798 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
3800 rate_control_rate_init(sta, local);
3802 return sta; /* caller will call sta_info_put() */
3806 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3808 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3809 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3811 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3814 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3815 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3818 ieee80211_send_deauth(dev, ifsta, reason);
3819 ieee80211_set_disassoc(dev, ifsta, 1);
3824 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3826 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3827 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3829 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3832 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3835 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3838 ieee80211_send_disassoc(dev, ifsta, reason);
3839 ieee80211_set_disassoc(dev, ifsta, 0);