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 params.txop = pos[2] | (pos[3] << 8);
301 #ifdef CONFIG_MAC80211_DEBUG
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d txop=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.txop);
307 /* TODO: handle ACM (block TX, fallback to next lowest allowed
309 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
310 printk(KERN_DEBUG "%s: failed to set TX queue "
311 "parameters for queue %d\n", dev->name, queue);
317 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
320 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
321 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
322 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
323 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
324 DECLARE_MAC_BUF(mac);
327 if (use_protection != bss_conf->use_cts_prot) {
328 if (net_ratelimit()) {
329 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
332 use_protection ? "enabled" : "disabled",
333 print_mac(mac, ifsta->bssid));
335 bss_conf->use_cts_prot = use_protection;
336 changed |= BSS_CHANGED_ERP_CTS_PROT;
339 if (preamble_mode != bss_conf->use_short_preamble) {
340 if (net_ratelimit()) {
341 printk(KERN_DEBUG "%s: switched to %s barker preamble"
344 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
346 print_mac(mac, ifsta->bssid));
348 bss_conf->use_short_preamble = preamble_mode;
349 changed |= BSS_CHANGED_ERP_PREAMBLE;
355 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
356 struct ieee80211_ht_info *ht_info)
362 memset(ht_info, 0, sizeof(*ht_info));
365 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
367 ht_info->ht_supported = 1;
368 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
369 ht_info->ampdu_factor =
370 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
371 ht_info->ampdu_density =
372 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
373 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
375 ht_info->ht_supported = 0;
380 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
381 struct ieee80211_ht_addt_info *ht_add_info_ie,
382 struct ieee80211_ht_bss_info *bss_info)
384 if (bss_info == NULL)
387 memset(bss_info, 0, sizeof(*bss_info));
389 if (ht_add_info_ie) {
391 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
393 bss_info->primary_channel = ht_add_info_ie->control_chan;
394 bss_info->bss_cap = ht_add_info_ie->ht_param;
395 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
401 static void ieee80211_sta_send_associnfo(struct net_device *dev,
402 struct ieee80211_if_sta *ifsta)
407 union iwreq_data wrqu;
409 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
412 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
413 ifsta->assocresp_ies_len), GFP_KERNEL);
417 len = sprintf(buf, "ASSOCINFO(");
418 if (ifsta->assocreq_ies) {
419 len += sprintf(buf + len, "ReqIEs=");
420 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
421 len += sprintf(buf + len, "%02x",
422 ifsta->assocreq_ies[i]);
425 if (ifsta->assocresp_ies) {
426 if (ifsta->assocreq_ies)
427 len += sprintf(buf + len, " ");
428 len += sprintf(buf + len, "RespIEs=");
429 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
430 len += sprintf(buf + len, "%02x",
431 ifsta->assocresp_ies[i]);
434 len += sprintf(buf + len, ")");
436 if (len > IW_CUSTOM_MAX) {
437 len = sprintf(buf, "ASSOCRESPIE=");
438 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
439 len += sprintf(buf + len, "%02x",
440 ifsta->assocresp_ies[i]);
444 memset(&wrqu, 0, sizeof(wrqu));
445 wrqu.data.length = len;
446 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
452 static void ieee80211_set_associated(struct net_device *dev,
453 struct ieee80211_if_sta *ifsta,
456 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
457 struct ieee80211_local *local = sdata->local;
458 union iwreq_data wrqu;
459 u32 changed = BSS_CHANGED_ASSOC;
462 struct ieee80211_sta_bss *bss;
464 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
466 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
469 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
470 local->hw.conf.channel->center_freq,
471 ifsta->ssid, ifsta->ssid_len);
473 if (bss->has_erp_value)
474 changed |= ieee80211_handle_erp_ie(
475 sdata, bss->erp_value);
476 ieee80211_rx_bss_put(dev, bss);
479 netif_carrier_on(dev);
480 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
481 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
482 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
483 ieee80211_sta_send_associnfo(dev, ifsta);
485 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
487 netif_carrier_off(dev);
488 ieee80211_reset_erp_info(dev);
489 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
491 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
492 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
493 ifsta->last_probe = jiffies;
494 ieee80211_led_assoc(local, assoc);
496 sdata->bss_conf.assoc = assoc;
497 ieee80211_bss_info_change_notify(sdata, changed);
500 static void ieee80211_set_disassoc(struct net_device *dev,
501 struct ieee80211_if_sta *ifsta, int deauth)
504 ifsta->auth_tries = 0;
505 ifsta->assoc_tries = 0;
506 ieee80211_set_associated(dev, ifsta, 0);
509 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
512 struct ieee80211_sub_if_data *sdata;
513 struct ieee80211_tx_packet_data *pkt_data;
515 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
516 skb->dev = sdata->local->mdev;
517 skb_set_mac_header(skb, 0);
518 skb_set_network_header(skb, 0);
519 skb_set_transport_header(skb, 0);
521 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
522 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
523 pkt_data->ifindex = sdata->dev->ifindex;
525 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
531 static void ieee80211_send_auth(struct net_device *dev,
532 struct ieee80211_if_sta *ifsta,
533 int transaction, u8 *extra, size_t extra_len,
536 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
538 struct ieee80211_mgmt *mgmt;
540 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
541 sizeof(*mgmt) + 6 + extra_len);
543 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
544 "frame\n", dev->name);
547 skb_reserve(skb, local->hw.extra_tx_headroom);
549 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
550 memset(mgmt, 0, 24 + 6);
551 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
552 IEEE80211_STYPE_AUTH);
554 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
555 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
556 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
557 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
558 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
559 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
560 ifsta->auth_transaction = transaction + 1;
561 mgmt->u.auth.status_code = cpu_to_le16(0);
563 memcpy(skb_put(skb, extra_len), extra, extra_len);
565 ieee80211_sta_tx(dev, skb, encrypt);
569 static void ieee80211_authenticate(struct net_device *dev,
570 struct ieee80211_if_sta *ifsta)
572 DECLARE_MAC_BUF(mac);
575 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
576 printk(KERN_DEBUG "%s: authentication with AP %s"
578 dev->name, print_mac(mac, ifsta->bssid));
579 ifsta->state = IEEE80211_DISABLED;
583 ifsta->state = IEEE80211_AUTHENTICATE;
584 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
585 dev->name, print_mac(mac, ifsta->bssid));
587 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
589 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
593 static void ieee80211_send_assoc(struct net_device *dev,
594 struct ieee80211_if_sta *ifsta)
596 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
598 struct ieee80211_mgmt *mgmt;
602 struct ieee80211_sta_bss *bss;
604 struct ieee80211_supported_band *sband;
606 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
607 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
610 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
611 "frame\n", dev->name);
614 skb_reserve(skb, local->hw.extra_tx_headroom);
616 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
618 capab = ifsta->capab;
620 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
621 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
622 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
623 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
624 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
627 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
628 local->hw.conf.channel->center_freq,
629 ifsta->ssid, ifsta->ssid_len);
631 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
632 capab |= WLAN_CAPABILITY_PRIVACY;
636 ieee80211_rx_bss_put(dev, bss);
639 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
641 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
642 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
643 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
645 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
647 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
648 IEEE80211_STYPE_REASSOC_REQ);
649 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
650 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
651 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
655 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
656 IEEE80211_STYPE_ASSOC_REQ);
657 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
658 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
662 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
663 *pos++ = WLAN_EID_SSID;
664 *pos++ = ifsta->ssid_len;
665 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
667 len = sband->n_bitrates;
670 pos = skb_put(skb, len + 2);
671 *pos++ = WLAN_EID_SUPP_RATES;
673 for (i = 0; i < len; i++) {
674 int rate = sband->bitrates[i].bitrate;
675 *pos++ = (u8) (rate / 5);
678 if (sband->n_bitrates > len) {
679 pos = skb_put(skb, sband->n_bitrates - len + 2);
680 *pos++ = WLAN_EID_EXT_SUPP_RATES;
681 *pos++ = sband->n_bitrates - len;
682 for (i = len; i < sband->n_bitrates; i++) {
683 int rate = sband->bitrates[i].bitrate;
684 *pos++ = (u8) (rate / 5);
688 if (ifsta->extra_ie) {
689 pos = skb_put(skb, ifsta->extra_ie_len);
690 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
693 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
694 pos = skb_put(skb, 9);
695 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
696 *pos++ = 7; /* len */
697 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
700 *pos++ = 2; /* WME */
701 *pos++ = 0; /* WME info */
702 *pos++ = 1; /* WME ver */
705 /* wmm support is a must to HT */
706 if (wmm && sband->ht_info.ht_supported) {
707 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
708 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
709 *pos++ = WLAN_EID_HT_CAPABILITY;
710 *pos++ = sizeof(struct ieee80211_ht_cap);
711 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
712 memcpy(pos, &tmp, sizeof(u16));
714 /* TODO: needs a define here for << 2 */
715 *pos++ = sband->ht_info.ampdu_factor |
716 (sband->ht_info.ampdu_density << 2);
717 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
720 kfree(ifsta->assocreq_ies);
721 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
722 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
723 if (ifsta->assocreq_ies)
724 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
726 ieee80211_sta_tx(dev, skb, 0);
730 static void ieee80211_send_deauth(struct net_device *dev,
731 struct ieee80211_if_sta *ifsta, u16 reason)
733 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
735 struct ieee80211_mgmt *mgmt;
737 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
739 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
740 "frame\n", dev->name);
743 skb_reserve(skb, local->hw.extra_tx_headroom);
745 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
747 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
748 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
749 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
750 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
751 IEEE80211_STYPE_DEAUTH);
753 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
755 ieee80211_sta_tx(dev, skb, 0);
759 static void ieee80211_send_disassoc(struct net_device *dev,
760 struct ieee80211_if_sta *ifsta, u16 reason)
762 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
764 struct ieee80211_mgmt *mgmt;
766 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
768 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
769 "frame\n", dev->name);
772 skb_reserve(skb, local->hw.extra_tx_headroom);
774 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
776 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
777 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
778 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
779 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
780 IEEE80211_STYPE_DISASSOC);
782 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
784 ieee80211_sta_tx(dev, skb, 0);
788 static int ieee80211_privacy_mismatch(struct net_device *dev,
789 struct ieee80211_if_sta *ifsta)
791 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
792 struct ieee80211_sta_bss *bss;
797 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
800 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
801 local->hw.conf.channel->center_freq,
802 ifsta->ssid, ifsta->ssid_len);
806 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
807 wep_privacy = !!ieee80211_sta_wep_configured(dev);
808 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
810 ieee80211_rx_bss_put(dev, bss);
812 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
819 static void ieee80211_associate(struct net_device *dev,
820 struct ieee80211_if_sta *ifsta)
822 DECLARE_MAC_BUF(mac);
824 ifsta->assoc_tries++;
825 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
826 printk(KERN_DEBUG "%s: association with AP %s"
828 dev->name, print_mac(mac, ifsta->bssid));
829 ifsta->state = IEEE80211_DISABLED;
833 ifsta->state = IEEE80211_ASSOCIATE;
834 printk(KERN_DEBUG "%s: associate with AP %s\n",
835 dev->name, print_mac(mac, ifsta->bssid));
836 if (ieee80211_privacy_mismatch(dev, ifsta)) {
837 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
838 "mixed-cell disabled - abort association\n", dev->name);
839 ifsta->state = IEEE80211_DISABLED;
843 ieee80211_send_assoc(dev, ifsta);
845 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
849 static void ieee80211_associated(struct net_device *dev,
850 struct ieee80211_if_sta *ifsta)
852 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
853 struct sta_info *sta;
855 DECLARE_MAC_BUF(mac);
857 /* TODO: start monitoring current AP signal quality and number of
858 * missed beacons. Scan other channels every now and then and search
860 /* TODO: remove expired BSSes */
862 ifsta->state = IEEE80211_ASSOCIATED;
864 sta = sta_info_get(local, ifsta->bssid);
866 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
867 dev->name, print_mac(mac, ifsta->bssid));
871 if (time_after(jiffies,
872 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
873 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
874 printk(KERN_DEBUG "%s: No ProbeResp from "
875 "current AP %s - assume out of "
877 dev->name, print_mac(mac, ifsta->bssid));
881 ieee80211_send_probe_req(dev, ifsta->bssid,
883 local->scan_ssid_len);
884 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
886 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
887 if (time_after(jiffies, ifsta->last_probe +
888 IEEE80211_PROBE_INTERVAL)) {
889 ifsta->last_probe = jiffies;
890 ieee80211_send_probe_req(dev, ifsta->bssid,
898 ifsta->state = IEEE80211_DISABLED;
899 ieee80211_set_associated(dev, ifsta, 0);
901 mod_timer(&ifsta->timer, jiffies +
902 IEEE80211_MONITORING_INTERVAL);
907 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
908 u8 *ssid, size_t ssid_len)
910 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
911 struct ieee80211_supported_band *sband;
913 struct ieee80211_mgmt *mgmt;
914 u8 *pos, *supp_rates, *esupp_rates = NULL;
917 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
919 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
920 "request\n", dev->name);
923 skb_reserve(skb, local->hw.extra_tx_headroom);
925 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
927 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
928 IEEE80211_STYPE_PROBE_REQ);
929 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
931 memcpy(mgmt->da, dst, ETH_ALEN);
932 memcpy(mgmt->bssid, dst, ETH_ALEN);
934 memset(mgmt->da, 0xff, ETH_ALEN);
935 memset(mgmt->bssid, 0xff, ETH_ALEN);
937 pos = skb_put(skb, 2 + ssid_len);
938 *pos++ = WLAN_EID_SSID;
940 memcpy(pos, ssid, ssid_len);
942 supp_rates = skb_put(skb, 2);
943 supp_rates[0] = WLAN_EID_SUPP_RATES;
945 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
947 for (i = 0; i < sband->n_bitrates; i++) {
948 struct ieee80211_rate *rate = &sband->bitrates[i];
950 pos = skb_put(skb, 1);
952 } else if (supp_rates[1] == 8) {
953 esupp_rates = skb_put(skb, 3);
954 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
956 pos = &esupp_rates[2];
958 pos = skb_put(skb, 1);
961 *pos = rate->bitrate / 5;
964 ieee80211_sta_tx(dev, skb, 0);
968 static int ieee80211_sta_wep_configured(struct net_device *dev)
970 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
971 if (!sdata || !sdata->default_key ||
972 sdata->default_key->conf.alg != ALG_WEP)
978 static void ieee80211_auth_completed(struct net_device *dev,
979 struct ieee80211_if_sta *ifsta)
981 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
982 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
983 ieee80211_associate(dev, ifsta);
987 static void ieee80211_auth_challenge(struct net_device *dev,
988 struct ieee80211_if_sta *ifsta,
989 struct ieee80211_mgmt *mgmt,
993 struct ieee802_11_elems elems;
995 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
996 pos = mgmt->u.auth.variable;
997 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
998 if (!elems.challenge) {
999 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1000 "frame\n", dev->name);
1003 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1004 elems.challenge_len + 2, 1);
1007 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1008 u8 dialog_token, u16 status, u16 policy,
1009 u16 buf_size, u16 timeout)
1011 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1012 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1013 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1014 struct sk_buff *skb;
1015 struct ieee80211_mgmt *mgmt;
1018 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1019 sizeof(mgmt->u.action.u.addba_resp));
1021 printk(KERN_DEBUG "%s: failed to allocate buffer "
1022 "for addba resp frame\n", dev->name);
1026 skb_reserve(skb, local->hw.extra_tx_headroom);
1027 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1028 memset(mgmt, 0, 24);
1029 memcpy(mgmt->da, da, ETH_ALEN);
1030 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1031 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1032 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1034 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1035 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1036 IEEE80211_STYPE_ACTION);
1038 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1039 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1040 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1041 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1043 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1044 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1045 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1047 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1048 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1049 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1051 ieee80211_sta_tx(dev, skb, 0);
1056 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1057 u16 tid, u8 dialog_token, u16 start_seq_num,
1058 u16 agg_size, u16 timeout)
1060 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1061 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1062 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1063 struct sk_buff *skb;
1064 struct ieee80211_mgmt *mgmt;
1067 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1068 sizeof(mgmt->u.action.u.addba_req));
1072 printk(KERN_ERR "%s: failed to allocate buffer "
1073 "for addba request frame\n", dev->name);
1076 skb_reserve(skb, local->hw.extra_tx_headroom);
1077 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1078 memset(mgmt, 0, 24);
1079 memcpy(mgmt->da, da, ETH_ALEN);
1080 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1081 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1082 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1084 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1086 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1087 IEEE80211_STYPE_ACTION);
1089 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1091 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1092 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1094 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1095 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1096 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1097 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1099 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1101 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1102 mgmt->u.action.u.addba_req.start_seq_num =
1103 cpu_to_le16(start_seq_num << 4);
1105 ieee80211_sta_tx(dev, skb, 0);
1108 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1109 struct ieee80211_mgmt *mgmt,
1112 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1113 struct ieee80211_hw *hw = &local->hw;
1114 struct ieee80211_conf *conf = &hw->conf;
1115 struct sta_info *sta;
1116 struct tid_ampdu_rx *tid_agg_rx;
1117 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1119 int ret = -EOPNOTSUPP;
1120 DECLARE_MAC_BUF(mac);
1122 sta = sta_info_get(local, mgmt->sa);
1126 /* extract session parameters from addba request frame */
1127 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1128 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1130 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1132 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1133 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1134 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1135 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1137 status = WLAN_STATUS_REQUEST_DECLINED;
1139 /* sanity check for incoming parameters:
1140 * check if configuration can support the BA policy
1141 * and if buffer size does not exceeds max value */
1142 if (((ba_policy != 1)
1143 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1144 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1145 status = WLAN_STATUS_INVALID_QOS_PARAM;
1146 #ifdef CONFIG_MAC80211_HT_DEBUG
1147 if (net_ratelimit())
1148 printk(KERN_DEBUG "Block Ack Req with bad params from "
1149 "%s on tid %u. policy %d, buffer size %d\n",
1150 print_mac(mac, mgmt->sa), tid, ba_policy,
1152 #endif /* CONFIG_MAC80211_HT_DEBUG */
1155 /* determine default buffer size */
1156 if (buf_size == 0) {
1157 struct ieee80211_supported_band *sband;
1159 sband = local->hw.wiphy->bands[conf->channel->band];
1160 buf_size = IEEE80211_MIN_AMPDU_BUF;
1161 buf_size = buf_size << sband->ht_info.ampdu_factor;
1164 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1166 /* examine state machine */
1167 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1169 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1170 #ifdef CONFIG_MAC80211_HT_DEBUG
1171 if (net_ratelimit())
1172 printk(KERN_DEBUG "unexpected Block Ack Req from "
1174 print_mac(mac, mgmt->sa), tid);
1175 #endif /* CONFIG_MAC80211_HT_DEBUG */
1179 /* prepare reordering buffer */
1180 tid_agg_rx->reorder_buf =
1181 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1182 if (!tid_agg_rx->reorder_buf) {
1183 if (net_ratelimit())
1184 printk(KERN_ERR "can not allocate reordering buffer "
1185 "to tid %d\n", tid);
1188 memset(tid_agg_rx->reorder_buf, 0,
1189 buf_size * sizeof(struct sk_buf *));
1191 if (local->ops->ampdu_action)
1192 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1193 sta->addr, tid, &start_seq_num);
1194 #ifdef CONFIG_MAC80211_HT_DEBUG
1195 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1196 #endif /* CONFIG_MAC80211_HT_DEBUG */
1199 kfree(tid_agg_rx->reorder_buf);
1203 /* change state and send addba resp */
1204 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1205 tid_agg_rx->dialog_token = dialog_token;
1206 tid_agg_rx->ssn = start_seq_num;
1207 tid_agg_rx->head_seq_num = start_seq_num;
1208 tid_agg_rx->buf_size = buf_size;
1209 tid_agg_rx->timeout = timeout;
1210 tid_agg_rx->stored_mpdu_num = 0;
1211 status = WLAN_STATUS_SUCCESS;
1213 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1216 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1217 status, 1, buf_size, timeout);
1221 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1222 struct ieee80211_mgmt *mgmt,
1225 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1226 struct ieee80211_hw *hw = &local->hw;
1227 struct sta_info *sta;
1232 sta = sta_info_get(local, mgmt->sa);
1236 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1237 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1239 state = &sta->ampdu_mlme.tid_tx[tid].state;
1241 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1243 if (mgmt->u.action.u.addba_resp.dialog_token !=
1244 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1245 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1246 #ifdef CONFIG_MAC80211_HT_DEBUG
1247 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1248 #endif /* CONFIG_MAC80211_HT_DEBUG */
1253 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1254 #ifdef CONFIG_MAC80211_HT_DEBUG
1255 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1256 #endif /* CONFIG_MAC80211_HT_DEBUG */
1257 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1258 == WLAN_STATUS_SUCCESS) {
1259 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1260 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1261 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1267 if (*state & HT_ADDBA_RECEIVED_MSK)
1268 printk(KERN_DEBUG "double addBA response\n");
1270 *state |= HT_ADDBA_RECEIVED_MSK;
1271 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1273 if (*state == HT_AGG_STATE_OPERATIONAL) {
1274 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1275 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1278 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1279 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1281 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1283 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1284 /* this will allow the state check in stop_BA_session */
1285 *state = HT_AGG_STATE_OPERATIONAL;
1286 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1287 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1288 WLAN_BACK_INITIATOR);
1293 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1294 u16 initiator, u16 reason_code)
1296 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1297 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1298 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1299 struct sk_buff *skb;
1300 struct ieee80211_mgmt *mgmt;
1303 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1304 sizeof(mgmt->u.action.u.delba));
1307 printk(KERN_ERR "%s: failed to allocate buffer "
1308 "for delba frame\n", dev->name);
1312 skb_reserve(skb, local->hw.extra_tx_headroom);
1313 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1314 memset(mgmt, 0, 24);
1315 memcpy(mgmt->da, da, ETH_ALEN);
1316 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1317 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1318 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1320 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1321 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1322 IEEE80211_STYPE_ACTION);
1324 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1326 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1327 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1328 params = (u16)(initiator << 11); /* bit 11 initiator */
1329 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1331 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1332 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1334 ieee80211_sta_tx(dev, skb, 0);
1337 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1338 u16 initiator, u16 reason)
1340 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1341 struct ieee80211_hw *hw = &local->hw;
1342 struct sta_info *sta;
1345 sta = sta_info_get(local, ra);
1349 /* check if TID is in operational state */
1350 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1351 if (sta->ampdu_mlme.tid_rx[tid].state
1352 != HT_AGG_STATE_OPERATIONAL) {
1353 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1357 sta->ampdu_mlme.tid_rx[tid].state =
1358 HT_AGG_STATE_REQ_STOP_BA_MSK |
1359 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1360 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1362 /* stop HW Rx aggregation. ampdu_action existence
1363 * already verified in session init so we add the BUG_ON */
1364 BUG_ON(!local->ops->ampdu_action);
1366 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1369 printk(KERN_DEBUG "HW problem - can not stop rx "
1370 "aggergation for tid %d\n", tid);
1372 /* shutdown timer has not expired */
1373 if (initiator != WLAN_BACK_TIMER)
1374 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1377 /* check if this is a self generated aggregation halt */
1378 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1379 ieee80211_send_delba(dev, ra, tid, 0, reason);
1381 /* free the reordering buffer */
1382 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1383 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1384 /* release the reordered frames */
1385 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1386 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1387 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1390 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1392 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1397 static void ieee80211_sta_process_delba(struct net_device *dev,
1398 struct ieee80211_mgmt *mgmt, size_t len)
1400 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1401 struct sta_info *sta;
1404 DECLARE_MAC_BUF(mac);
1406 sta = sta_info_get(local, mgmt->sa);
1410 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1411 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1412 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1414 #ifdef CONFIG_MAC80211_HT_DEBUG
1415 if (net_ratelimit())
1416 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1417 print_mac(mac, mgmt->sa),
1418 initiator ? "recipient" : "initiator", tid,
1419 mgmt->u.action.u.delba.reason_code);
1420 #endif /* CONFIG_MAC80211_HT_DEBUG */
1422 if (initiator == WLAN_BACK_INITIATOR)
1423 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1424 WLAN_BACK_INITIATOR, 0);
1425 else { /* WLAN_BACK_RECIPIENT */
1426 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1427 sta->ampdu_mlme.tid_tx[tid].state =
1428 HT_AGG_STATE_OPERATIONAL;
1429 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1430 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1431 WLAN_BACK_RECIPIENT);
1437 * After sending add Block Ack request we activated a timer until
1438 * add Block Ack response will arrive from the recipient.
1439 * If this timer expires sta_addba_resp_timer_expired will be executed.
1441 void sta_addba_resp_timer_expired(unsigned long data)
1443 /* not an elegant detour, but there is no choice as the timer passes
1444 * only one argument, and both sta_info and TID are needed, so init
1445 * flow in sta_info_add gives the TID as data, while the timer_to_id
1446 * array gives the sta through container_of */
1447 u16 tid = *(int *)data;
1448 struct sta_info *temp_sta = container_of((void *)data,
1449 struct sta_info, timer_to_tid[tid]);
1451 struct ieee80211_local *local = temp_sta->local;
1452 struct ieee80211_hw *hw = &local->hw;
1453 struct sta_info *sta;
1456 sta = sta_info_get(local, temp_sta->addr);
1460 state = &sta->ampdu_mlme.tid_tx[tid].state;
1461 /* check if the TID waits for addBA response */
1462 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1463 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1464 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1465 *state = HT_AGG_STATE_IDLE;
1466 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1467 "expecting addBA response there", tid);
1468 goto timer_expired_exit;
1471 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1473 /* go through the state check in stop_BA_session */
1474 *state = HT_AGG_STATE_OPERATIONAL;
1475 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1476 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1477 WLAN_BACK_INITIATOR);
1484 * After receiving Block Ack Request (BAR) we activated a
1485 * timer after each frame arrives from the originator.
1486 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1488 void sta_rx_agg_session_timer_expired(unsigned long data)
1490 /* not an elegant detour, but there is no choice as the timer passes
1491 * only one argument, and verious sta_info are needed here, so init
1492 * flow in sta_info_add gives the TID as data, while the timer_to_id
1493 * array gives the sta through container_of */
1494 u8 *ptid = (u8 *)data;
1495 u8 *timer_to_id = ptid - *ptid;
1496 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1499 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1500 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1502 WLAN_REASON_QSTA_TIMEOUT);
1506 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1507 struct ieee80211_if_sta *ifsta,
1508 struct ieee80211_mgmt *mgmt,
1511 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1512 u16 auth_alg, auth_transaction, status_code;
1513 DECLARE_MAC_BUF(mac);
1515 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1516 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1517 printk(KERN_DEBUG "%s: authentication frame received from "
1518 "%s, but not in authenticate state - ignored\n",
1519 dev->name, print_mac(mac, mgmt->sa));
1524 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1525 "received from %s - ignored\n",
1526 dev->name, len, print_mac(mac, mgmt->sa));
1530 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1531 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1532 printk(KERN_DEBUG "%s: authentication frame received from "
1533 "unknown AP (SA=%s BSSID=%s) - "
1534 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1535 print_mac(mac, mgmt->bssid));
1539 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1540 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1541 printk(KERN_DEBUG "%s: authentication frame received from "
1542 "unknown BSSID (SA=%s BSSID=%s) - "
1543 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1544 print_mac(mac, mgmt->bssid));
1548 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1549 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1550 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1552 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1553 "transaction=%d status=%d)\n",
1554 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1555 auth_transaction, status_code);
1557 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1558 /* IEEE 802.11 standard does not require authentication in IBSS
1559 * networks and most implementations do not seem to use it.
1560 * However, try to reply to authentication attempts if someone
1561 * has actually implemented this.
1562 * TODO: Could implement shared key authentication. */
1563 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1564 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1565 "frame (alg=%d transaction=%d)\n",
1566 dev->name, auth_alg, auth_transaction);
1569 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1572 if (auth_alg != ifsta->auth_alg ||
1573 auth_transaction != ifsta->auth_transaction) {
1574 printk(KERN_DEBUG "%s: unexpected authentication frame "
1575 "(alg=%d transaction=%d)\n",
1576 dev->name, auth_alg, auth_transaction);
1580 if (status_code != WLAN_STATUS_SUCCESS) {
1581 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1582 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1583 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1585 const int num_algs = ARRAY_SIZE(algs);
1587 algs[0] = algs[1] = algs[2] = 0xff;
1588 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1589 algs[0] = WLAN_AUTH_OPEN;
1590 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1591 algs[1] = WLAN_AUTH_SHARED_KEY;
1592 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1593 algs[2] = WLAN_AUTH_LEAP;
1594 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1596 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1600 for (i = 0; i < num_algs; i++) {
1602 if (pos >= num_algs)
1604 if (algs[pos] == ifsta->auth_alg ||
1607 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1608 !ieee80211_sta_wep_configured(dev))
1610 ifsta->auth_alg = algs[pos];
1611 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1613 dev->name, ifsta->auth_alg);
1620 switch (ifsta->auth_alg) {
1621 case WLAN_AUTH_OPEN:
1622 case WLAN_AUTH_LEAP:
1623 ieee80211_auth_completed(dev, ifsta);
1625 case WLAN_AUTH_SHARED_KEY:
1626 if (ifsta->auth_transaction == 4)
1627 ieee80211_auth_completed(dev, ifsta);
1629 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1635 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1636 struct ieee80211_if_sta *ifsta,
1637 struct ieee80211_mgmt *mgmt,
1641 DECLARE_MAC_BUF(mac);
1644 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1645 "received from %s - ignored\n",
1646 dev->name, len, print_mac(mac, mgmt->sa));
1650 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1651 printk(KERN_DEBUG "%s: deauthentication frame received from "
1652 "unknown AP (SA=%s BSSID=%s) - "
1653 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1654 print_mac(mac, mgmt->bssid));
1658 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1660 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1662 dev->name, print_mac(mac, mgmt->sa), reason_code);
1664 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1665 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1668 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1669 ifsta->state == IEEE80211_ASSOCIATE ||
1670 ifsta->state == IEEE80211_ASSOCIATED) {
1671 ifsta->state = IEEE80211_AUTHENTICATE;
1672 mod_timer(&ifsta->timer, jiffies +
1673 IEEE80211_RETRY_AUTH_INTERVAL);
1676 ieee80211_set_disassoc(dev, ifsta, 1);
1677 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1681 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1682 struct ieee80211_if_sta *ifsta,
1683 struct ieee80211_mgmt *mgmt,
1687 DECLARE_MAC_BUF(mac);
1690 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1691 "received from %s - ignored\n",
1692 dev->name, len, print_mac(mac, mgmt->sa));
1696 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1697 printk(KERN_DEBUG "%s: disassociation frame received from "
1698 "unknown AP (SA=%s BSSID=%s) - "
1699 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1700 print_mac(mac, mgmt->bssid));
1704 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1706 printk(KERN_DEBUG "%s: RX disassociation from %s"
1708 dev->name, print_mac(mac, mgmt->sa), reason_code);
1710 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1711 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1713 if (ifsta->state == IEEE80211_ASSOCIATED) {
1714 ifsta->state = IEEE80211_ASSOCIATE;
1715 mod_timer(&ifsta->timer, jiffies +
1716 IEEE80211_RETRY_AUTH_INTERVAL);
1719 ieee80211_set_disassoc(dev, ifsta, 0);
1723 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1724 struct ieee80211_if_sta *ifsta,
1725 struct ieee80211_mgmt *mgmt,
1729 struct ieee80211_local *local = sdata->local;
1730 struct net_device *dev = sdata->dev;
1731 struct ieee80211_supported_band *sband;
1732 struct sta_info *sta;
1733 u64 rates, basic_rates;
1734 u16 capab_info, status_code, aid;
1735 struct ieee802_11_elems elems;
1736 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1739 DECLARE_MAC_BUF(mac);
1740 bool have_higher_than_11mbit = false;
1742 /* AssocResp and ReassocResp have identical structure, so process both
1743 * of them in this function. */
1745 if (ifsta->state != IEEE80211_ASSOCIATE) {
1746 printk(KERN_DEBUG "%s: association frame received from "
1747 "%s, but not in associate state - ignored\n",
1748 dev->name, print_mac(mac, mgmt->sa));
1753 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1754 "received from %s - ignored\n",
1755 dev->name, len, print_mac(mac, mgmt->sa));
1759 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1760 printk(KERN_DEBUG "%s: association frame received from "
1761 "unknown AP (SA=%s BSSID=%s) - "
1762 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1763 print_mac(mac, mgmt->bssid));
1767 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1768 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1769 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1771 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1772 "status=%d aid=%d)\n",
1773 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1774 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1776 if (status_code != WLAN_STATUS_SUCCESS) {
1777 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1778 dev->name, status_code);
1779 /* if this was a reassociation, ensure we try a "full"
1780 * association next time. This works around some broken APs
1781 * which do not correctly reject reassociation requests. */
1782 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1786 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1787 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1788 "set\n", dev->name, aid);
1789 aid &= ~(BIT(15) | BIT(14));
1791 pos = mgmt->u.assoc_resp.variable;
1792 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1794 if (!elems.supp_rates) {
1795 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1800 printk(KERN_DEBUG "%s: associated\n", dev->name);
1802 ifsta->ap_capab = capab_info;
1804 kfree(ifsta->assocresp_ies);
1805 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1806 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1807 if (ifsta->assocresp_ies)
1808 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1810 /* Add STA entry for the AP */
1811 sta = sta_info_get(local, ifsta->bssid);
1813 struct ieee80211_sta_bss *bss;
1814 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1816 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1817 " AP\n", dev->name);
1820 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1821 local->hw.conf.channel->center_freq,
1822 ifsta->ssid, ifsta->ssid_len);
1824 sta->last_rssi = bss->rssi;
1825 sta->last_signal = bss->signal;
1826 sta->last_noise = bss->noise;
1827 ieee80211_rx_bss_put(dev, bss);
1832 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1833 WLAN_STA_AUTHORIZED;
1837 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1839 for (i = 0; i < elems.supp_rates_len; i++) {
1840 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1843 have_higher_than_11mbit = true;
1845 for (j = 0; j < sband->n_bitrates; j++) {
1846 if (sband->bitrates[j].bitrate == rate)
1848 if (elems.supp_rates[i] & 0x80)
1849 basic_rates |= BIT(j);
1853 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1854 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1857 have_higher_than_11mbit = true;
1859 for (j = 0; j < sband->n_bitrates; j++) {
1860 if (sband->bitrates[j].bitrate == rate)
1862 if (elems.ext_supp_rates[i] & 0x80)
1863 basic_rates |= BIT(j);
1867 sta->supp_rates[local->hw.conf.channel->band] = rates;
1868 sdata->basic_rates = basic_rates;
1870 /* cf. IEEE 802.11 9.2.12 */
1871 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1872 have_higher_than_11mbit)
1873 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1875 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1877 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1878 local->ops->conf_ht) {
1879 struct ieee80211_ht_bss_info bss_info;
1881 ieee80211_ht_cap_ie_to_ht_info(
1882 (struct ieee80211_ht_cap *)
1883 elems.ht_cap_elem, &sta->ht_info);
1884 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1885 (struct ieee80211_ht_addt_info *)
1886 elems.ht_info_elem, &bss_info);
1887 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1890 rate_control_rate_init(sta, local);
1892 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1893 sta->flags |= WLAN_STA_WME;
1894 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1895 elems.wmm_param_len);
1898 /* set AID, ieee80211_set_associated() will tell the driver */
1899 bss_conf->aid = aid;
1900 ieee80211_set_associated(dev, ifsta, 1);
1904 ieee80211_associated(dev, ifsta);
1908 /* Caller must hold local->sta_bss_lock */
1909 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1910 struct ieee80211_sta_bss *bss)
1912 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1913 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1914 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1918 /* Caller must hold local->sta_bss_lock */
1919 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1920 struct ieee80211_sta_bss *bss)
1922 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1923 struct ieee80211_sta_bss *b, *prev = NULL;
1924 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1928 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1931 prev->hnext = bss->hnext;
1940 static struct ieee80211_sta_bss *
1941 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1942 u8 *ssid, u8 ssid_len)
1944 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1945 struct ieee80211_sta_bss *bss;
1947 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1950 atomic_inc(&bss->users);
1951 atomic_inc(&bss->users);
1952 memcpy(bss->bssid, bssid, ETH_ALEN);
1954 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1955 memcpy(bss->ssid, ssid, ssid_len);
1956 bss->ssid_len = ssid_len;
1959 spin_lock_bh(&local->sta_bss_lock);
1960 /* TODO: order by RSSI? */
1961 list_add_tail(&bss->list, &local->sta_bss_list);
1962 __ieee80211_rx_bss_hash_add(dev, bss);
1963 spin_unlock_bh(&local->sta_bss_lock);
1968 static struct ieee80211_sta_bss *
1969 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1970 u8 *ssid, u8 ssid_len)
1972 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1973 struct ieee80211_sta_bss *bss;
1975 spin_lock_bh(&local->sta_bss_lock);
1976 bss = local->sta_bss_hash[STA_HASH(bssid)];
1978 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1979 bss->freq == freq &&
1980 bss->ssid_len == ssid_len &&
1981 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1982 atomic_inc(&bss->users);
1987 spin_unlock_bh(&local->sta_bss_lock);
1992 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2002 static void ieee80211_rx_bss_put(struct net_device *dev,
2003 struct ieee80211_sta_bss *bss)
2005 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2006 if (!atomic_dec_and_test(&bss->users))
2009 spin_lock_bh(&local->sta_bss_lock);
2010 __ieee80211_rx_bss_hash_del(dev, bss);
2011 list_del(&bss->list);
2012 spin_unlock_bh(&local->sta_bss_lock);
2013 ieee80211_rx_bss_free(bss);
2017 void ieee80211_rx_bss_list_init(struct net_device *dev)
2019 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2020 spin_lock_init(&local->sta_bss_lock);
2021 INIT_LIST_HEAD(&local->sta_bss_list);
2025 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2027 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2028 struct ieee80211_sta_bss *bss, *tmp;
2030 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2031 ieee80211_rx_bss_put(dev, bss);
2035 static void ieee80211_rx_bss_info(struct net_device *dev,
2036 struct ieee80211_mgmt *mgmt,
2038 struct ieee80211_rx_status *rx_status,
2041 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2042 struct ieee802_11_elems elems;
2045 struct ieee80211_sta_bss *bss;
2046 struct sta_info *sta;
2047 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2049 DECLARE_MAC_BUF(mac);
2050 DECLARE_MAC_BUF(mac2);
2052 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2053 return; /* ignore ProbeResp to foreign address */
2056 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2057 dev->name, beacon ? "Beacon" : "Probe Response",
2058 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2061 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2065 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2067 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2068 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2069 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2070 static unsigned long last_tsf_debug = 0;
2072 if (local->ops->get_tsf)
2073 tsf = local->ops->get_tsf(local_to_hw(local));
2076 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
2077 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2078 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
2080 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
2081 (unsigned long long)tsf,
2082 (unsigned long long)timestamp,
2083 (unsigned long long)(tsf - timestamp),
2085 last_tsf_debug = jiffies;
2087 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2090 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2092 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2093 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2094 (sta = sta_info_get(local, mgmt->sa))) {
2095 struct ieee80211_supported_band *sband;
2096 struct ieee80211_rate *bitrates;
2098 u64 supp_rates, prev_rates;
2101 sband = local->hw.wiphy->bands[rx_status->band];
2105 sband = local->hw.wiphy->bands[
2106 local->hw.conf.channel->band];
2109 bitrates = sband->bitrates;
2110 num_rates = sband->n_bitrates;
2113 for (i = 0; i < elems.supp_rates_len +
2114 elems.ext_supp_rates_len; i++) {
2117 if (i < elems.supp_rates_len)
2118 rate = elems.supp_rates[i];
2119 else if (elems.ext_supp_rates)
2120 rate = elems.ext_supp_rates
2121 [i - elems.supp_rates_len];
2122 own_rate = 5 * (rate & 0x7f);
2123 for (j = 0; j < num_rates; j++)
2124 if (bitrates[j].bitrate == own_rate)
2125 supp_rates |= BIT(j);
2128 prev_rates = sta->supp_rates[rx_status->band];
2129 sta->supp_rates[rx_status->band] &= supp_rates;
2130 if (sta->supp_rates[rx_status->band] == 0) {
2131 /* No matching rates - this should not really happen.
2132 * Make sure that at least one rate is marked
2133 * supported to avoid issues with TX rate ctrl. */
2134 sta->supp_rates[rx_status->band] =
2135 sdata->u.sta.supp_rates_bits[rx_status->band];
2137 if (sta->supp_rates[rx_status->band] != prev_rates) {
2138 printk(KERN_DEBUG "%s: updated supp_rates set for "
2139 "%s based on beacon info (0x%llx & 0x%llx -> "
2141 dev->name, print_mac(mac, sta->addr),
2142 (unsigned long long) prev_rates,
2143 (unsigned long long) supp_rates,
2144 (unsigned long long) sta->supp_rates[rx_status->band]);
2152 if (elems.ds_params && elems.ds_params_len == 1)
2153 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2155 freq = rx_status->freq;
2157 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2158 elems.ssid, elems.ssid_len);
2160 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2161 elems.ssid, elems.ssid_len);
2166 /* TODO: order by RSSI? */
2167 spin_lock_bh(&local->sta_bss_lock);
2168 list_move_tail(&bss->list, &local->sta_bss_list);
2169 spin_unlock_bh(&local->sta_bss_lock);
2173 bss->band = rx_status->band;
2175 if (bss->probe_resp && beacon) {
2176 /* Do not allow beacon to override data from Probe Response. */
2177 ieee80211_rx_bss_put(dev, bss);
2181 /* save the ERP value so that it is available at association time */
2182 if (elems.erp_info && elems.erp_info_len >= 1) {
2183 bss->erp_value = elems.erp_info[0];
2184 bss->has_erp_value = 1;
2187 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2188 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2190 bss->supp_rates_len = 0;
2191 if (elems.supp_rates) {
2192 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2193 if (clen > elems.supp_rates_len)
2194 clen = elems.supp_rates_len;
2195 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2197 bss->supp_rates_len += clen;
2199 if (elems.ext_supp_rates) {
2200 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2201 if (clen > elems.ext_supp_rates_len)
2202 clen = elems.ext_supp_rates_len;
2203 memcpy(&bss->supp_rates[bss->supp_rates_len],
2204 elems.ext_supp_rates, clen);
2205 bss->supp_rates_len += clen;
2209 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2210 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2212 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2214 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2215 bss->wpa_ie_len = elems.wpa_len + 2;
2217 bss->wpa_ie_len = 0;
2218 } else if (!elems.wpa && bss->wpa_ie) {
2221 bss->wpa_ie_len = 0;
2225 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2226 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2228 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2230 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2231 bss->rsn_ie_len = elems.rsn_len + 2;
2233 bss->rsn_ie_len = 0;
2234 } else if (!elems.rsn && bss->rsn_ie) {
2237 bss->rsn_ie_len = 0;
2240 if (elems.wmm_param &&
2241 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2242 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2244 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2246 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2247 elems.wmm_param_len + 2);
2248 bss->wmm_ie_len = elems.wmm_param_len + 2;
2250 bss->wmm_ie_len = 0;
2251 } else if (!elems.wmm_param && bss->wmm_ie) {
2254 bss->wmm_ie_len = 0;
2256 if (elems.ht_cap_elem &&
2257 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2258 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2260 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2262 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2263 elems.ht_cap_elem_len + 2);
2264 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2267 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2273 bss->timestamp = timestamp;
2274 bss->last_update = jiffies;
2275 bss->rssi = rx_status->ssi;
2276 bss->signal = rx_status->signal;
2277 bss->noise = rx_status->noise;
2280 ieee80211_rx_bss_put(dev, bss);
2284 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2285 struct ieee80211_mgmt *mgmt,
2287 struct ieee80211_rx_status *rx_status)
2289 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2293 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2294 struct ieee80211_mgmt *mgmt,
2296 struct ieee80211_rx_status *rx_status)
2298 struct ieee80211_sub_if_data *sdata;
2299 struct ieee80211_if_sta *ifsta;
2301 struct ieee802_11_elems elems;
2302 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2303 struct ieee80211_conf *conf = &local->hw.conf;
2306 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2308 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2309 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2311 ifsta = &sdata->u.sta;
2313 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2314 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2317 /* Process beacon from the current BSS */
2318 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2322 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2324 if (elems.erp_info && elems.erp_info_len >= 1)
2325 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2327 if (elems.ht_cap_elem && elems.ht_info_elem &&
2328 elems.wmm_param && local->ops->conf_ht &&
2329 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2330 struct ieee80211_ht_bss_info bss_info;
2332 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2333 (struct ieee80211_ht_addt_info *)
2334 elems.ht_info_elem, &bss_info);
2335 /* check if AP changed bss inforamation */
2336 if ((conf->ht_bss_conf.primary_channel !=
2337 bss_info.primary_channel) ||
2338 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2339 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2340 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2344 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2345 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2346 elems.wmm_param_len);
2349 ieee80211_bss_info_change_notify(sdata, changed);
2353 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2354 struct ieee80211_if_sta *ifsta,
2355 struct ieee80211_mgmt *mgmt,
2357 struct ieee80211_rx_status *rx_status)
2359 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2360 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2362 struct sk_buff *skb;
2363 struct ieee80211_mgmt *resp;
2365 DECLARE_MAC_BUF(mac);
2366 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2367 DECLARE_MAC_BUF(mac2);
2368 DECLARE_MAC_BUF(mac3);
2371 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2372 ifsta->state != IEEE80211_IBSS_JOINED ||
2373 len < 24 + 2 || !ifsta->probe_resp)
2376 if (local->ops->tx_last_beacon)
2377 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2381 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2382 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2383 "%s (tx_last_beacon=%d)\n",
2384 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2385 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2386 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2388 if (!tx_last_beacon)
2391 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2392 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2395 end = ((u8 *) mgmt) + len;
2396 pos = mgmt->u.probe_req.variable;
2397 if (pos[0] != WLAN_EID_SSID ||
2398 pos + 2 + pos[1] > end) {
2399 if (net_ratelimit()) {
2400 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2402 dev->name, print_mac(mac, mgmt->sa));
2407 (pos[1] != ifsta->ssid_len ||
2408 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2409 /* Ignore ProbeReq for foreign SSID */
2413 /* Reply with ProbeResp */
2414 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2418 resp = (struct ieee80211_mgmt *) skb->data;
2419 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2420 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2421 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2422 dev->name, print_mac(mac, resp->da));
2423 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2424 ieee80211_sta_tx(dev, skb, 0);
2427 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2428 struct ieee80211_if_sta *ifsta,
2429 struct ieee80211_mgmt *mgmt,
2432 if (len < IEEE80211_MIN_ACTION_SIZE)
2435 switch (mgmt->u.action.category) {
2436 case WLAN_CATEGORY_BACK:
2437 switch (mgmt->u.action.u.addba_req.action_code) {
2438 case WLAN_ACTION_ADDBA_REQ:
2439 if (len < (IEEE80211_MIN_ACTION_SIZE +
2440 sizeof(mgmt->u.action.u.addba_req)))
2442 ieee80211_sta_process_addba_request(dev, mgmt, len);
2444 case WLAN_ACTION_ADDBA_RESP:
2445 if (len < (IEEE80211_MIN_ACTION_SIZE +
2446 sizeof(mgmt->u.action.u.addba_resp)))
2448 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2450 case WLAN_ACTION_DELBA:
2451 if (len < (IEEE80211_MIN_ACTION_SIZE +
2452 sizeof(mgmt->u.action.u.delba)))
2454 ieee80211_sta_process_delba(dev, mgmt, len);
2457 if (net_ratelimit())
2458 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2468 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2469 struct ieee80211_rx_status *rx_status)
2471 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2472 struct ieee80211_sub_if_data *sdata;
2473 struct ieee80211_if_sta *ifsta;
2474 struct ieee80211_mgmt *mgmt;
2480 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2481 ifsta = &sdata->u.sta;
2483 mgmt = (struct ieee80211_mgmt *) skb->data;
2484 fc = le16_to_cpu(mgmt->frame_control);
2486 switch (fc & IEEE80211_FCTL_STYPE) {
2487 case IEEE80211_STYPE_PROBE_REQ:
2488 case IEEE80211_STYPE_PROBE_RESP:
2489 case IEEE80211_STYPE_BEACON:
2490 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2491 case IEEE80211_STYPE_AUTH:
2492 case IEEE80211_STYPE_ASSOC_RESP:
2493 case IEEE80211_STYPE_REASSOC_RESP:
2494 case IEEE80211_STYPE_DEAUTH:
2495 case IEEE80211_STYPE_DISASSOC:
2496 case IEEE80211_STYPE_ACTION:
2497 skb_queue_tail(&ifsta->skb_queue, skb);
2498 queue_work(local->hw.workqueue, &ifsta->work);
2501 printk(KERN_DEBUG "%s: received unknown management frame - "
2502 "stype=%d\n", dev->name,
2503 (fc & IEEE80211_FCTL_STYPE) >> 4);
2512 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2513 struct sk_buff *skb)
2515 struct ieee80211_rx_status *rx_status;
2516 struct ieee80211_sub_if_data *sdata;
2517 struct ieee80211_if_sta *ifsta;
2518 struct ieee80211_mgmt *mgmt;
2521 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2522 ifsta = &sdata->u.sta;
2524 rx_status = (struct ieee80211_rx_status *) skb->cb;
2525 mgmt = (struct ieee80211_mgmt *) skb->data;
2526 fc = le16_to_cpu(mgmt->frame_control);
2528 switch (fc & IEEE80211_FCTL_STYPE) {
2529 case IEEE80211_STYPE_PROBE_REQ:
2530 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2533 case IEEE80211_STYPE_PROBE_RESP:
2534 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2536 case IEEE80211_STYPE_BEACON:
2537 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2539 case IEEE80211_STYPE_AUTH:
2540 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2542 case IEEE80211_STYPE_ASSOC_RESP:
2543 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2545 case IEEE80211_STYPE_REASSOC_RESP:
2546 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2548 case IEEE80211_STYPE_DEAUTH:
2549 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2551 case IEEE80211_STYPE_DISASSOC:
2552 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2554 case IEEE80211_STYPE_ACTION:
2555 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2564 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2565 struct ieee80211_rx_status *rx_status)
2567 struct ieee80211_mgmt *mgmt;
2571 return RX_DROP_UNUSABLE;
2573 mgmt = (struct ieee80211_mgmt *) skb->data;
2574 fc = le16_to_cpu(mgmt->frame_control);
2576 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2580 return RX_DROP_MONITOR;
2582 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2583 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2584 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2585 skb->len, rx_status);
2588 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2589 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2599 static int ieee80211_sta_active_ibss(struct net_device *dev)
2601 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2603 struct sta_info *sta;
2605 read_lock_bh(&local->sta_lock);
2606 list_for_each_entry(sta, &local->sta_list, list) {
2607 if (sta->dev == dev &&
2608 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2614 read_unlock_bh(&local->sta_lock);
2620 static void ieee80211_sta_expire(struct net_device *dev)
2622 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2623 struct sta_info *sta, *tmp;
2624 LIST_HEAD(tmp_list);
2625 DECLARE_MAC_BUF(mac);
2627 write_lock_bh(&local->sta_lock);
2628 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2629 if (time_after(jiffies, sta->last_rx +
2630 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2631 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2632 dev->name, print_mac(mac, sta->addr));
2633 __sta_info_get(sta);
2634 sta_info_remove(sta);
2635 list_add(&sta->list, &tmp_list);
2637 write_unlock_bh(&local->sta_lock);
2639 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2646 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2647 struct ieee80211_if_sta *ifsta)
2649 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2651 ieee80211_sta_expire(dev);
2652 if (ieee80211_sta_active_ibss(dev))
2655 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2656 "IBSS networks with same SSID (merge)\n", dev->name);
2657 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2661 void ieee80211_sta_timer(unsigned long data)
2663 struct ieee80211_sub_if_data *sdata =
2664 (struct ieee80211_sub_if_data *) data;
2665 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2666 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2668 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2669 queue_work(local->hw.workqueue, &ifsta->work);
2673 void ieee80211_sta_work(struct work_struct *work)
2675 struct ieee80211_sub_if_data *sdata =
2676 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2677 struct net_device *dev = sdata->dev;
2678 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2679 struct ieee80211_if_sta *ifsta;
2680 struct sk_buff *skb;
2682 if (!netif_running(dev))
2685 if (local->sta_sw_scanning || local->sta_hw_scanning)
2688 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2689 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2690 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2691 "(type=%d)\n", dev->name, sdata->vif.type);
2694 ifsta = &sdata->u.sta;
2696 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2697 ieee80211_sta_rx_queued_mgmt(dev, skb);
2699 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2700 ifsta->state != IEEE80211_ASSOCIATE &&
2701 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2702 if (ifsta->scan_ssid_len)
2703 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2705 ieee80211_sta_start_scan(dev, NULL, 0);
2709 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2710 if (ieee80211_sta_config_auth(dev, ifsta))
2712 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2713 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2716 switch (ifsta->state) {
2717 case IEEE80211_DISABLED:
2719 case IEEE80211_AUTHENTICATE:
2720 ieee80211_authenticate(dev, ifsta);
2722 case IEEE80211_ASSOCIATE:
2723 ieee80211_associate(dev, ifsta);
2725 case IEEE80211_ASSOCIATED:
2726 ieee80211_associated(dev, ifsta);
2728 case IEEE80211_IBSS_SEARCH:
2729 ieee80211_sta_find_ibss(dev, ifsta);
2731 case IEEE80211_IBSS_JOINED:
2732 ieee80211_sta_merge_ibss(dev, ifsta);
2735 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2740 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2741 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2742 "mixed-cell disabled - disassociate\n", dev->name);
2744 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2745 ieee80211_set_disassoc(dev, ifsta, 0);
2750 static void ieee80211_sta_reset_auth(struct net_device *dev,
2751 struct ieee80211_if_sta *ifsta)
2753 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2755 if (local->ops->reset_tsf) {
2756 /* Reset own TSF to allow time synchronization work. */
2757 local->ops->reset_tsf(local_to_hw(local));
2760 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2763 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2764 ifsta->auth_alg = WLAN_AUTH_OPEN;
2765 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2766 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2767 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2768 ifsta->auth_alg = WLAN_AUTH_LEAP;
2770 ifsta->auth_alg = WLAN_AUTH_OPEN;
2771 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2773 ifsta->auth_transaction = -1;
2774 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2775 ifsta->auth_tries = ifsta->assoc_tries = 0;
2776 netif_carrier_off(dev);
2780 void ieee80211_sta_req_auth(struct net_device *dev,
2781 struct ieee80211_if_sta *ifsta)
2783 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2784 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2786 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2789 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2790 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2791 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2792 IEEE80211_STA_AUTO_SSID_SEL))) {
2793 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2794 queue_work(local->hw.workqueue, &ifsta->work);
2798 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2799 const char *ssid, int ssid_len)
2801 int tmp, hidden_ssid;
2803 if (ssid_len == ifsta->ssid_len &&
2804 !memcmp(ifsta->ssid, ssid, ssid_len))
2807 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
2813 if (ssid[tmp] != '\0') {
2819 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2822 if (ssid_len == 1 && ssid[0] == ' ')
2828 static int ieee80211_sta_config_auth(struct net_device *dev,
2829 struct ieee80211_if_sta *ifsta)
2831 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2832 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2833 struct ieee80211_sta_bss *bss, *selected = NULL;
2834 int top_rssi = 0, freq;
2836 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2837 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
2838 ifsta->state = IEEE80211_AUTHENTICATE;
2839 ieee80211_sta_reset_auth(dev, ifsta);
2843 spin_lock_bh(&local->sta_bss_lock);
2844 freq = local->oper_channel->center_freq;
2845 list_for_each_entry(bss, &local->sta_bss_list, list) {
2846 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2849 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2850 !!sdata->default_key)
2853 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2857 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
2858 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2861 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
2862 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2865 if (!selected || top_rssi < bss->rssi) {
2867 top_rssi = bss->rssi;
2871 atomic_inc(&selected->users);
2872 spin_unlock_bh(&local->sta_bss_lock);
2875 ieee80211_set_freq(local, selected->freq);
2876 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
2877 ieee80211_sta_set_ssid(dev, selected->ssid,
2878 selected->ssid_len);
2879 ieee80211_sta_set_bssid(dev, selected->bssid);
2880 ieee80211_rx_bss_put(dev, selected);
2881 ifsta->state = IEEE80211_AUTHENTICATE;
2882 ieee80211_sta_reset_auth(dev, ifsta);
2885 if (ifsta->state != IEEE80211_AUTHENTICATE) {
2886 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
2887 ieee80211_sta_start_scan(dev, NULL, 0);
2889 ieee80211_sta_start_scan(dev, ifsta->ssid,
2891 ifsta->state = IEEE80211_AUTHENTICATE;
2892 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2894 ifsta->state = IEEE80211_DISABLED;
2899 static int ieee80211_sta_join_ibss(struct net_device *dev,
2900 struct ieee80211_if_sta *ifsta,
2901 struct ieee80211_sta_bss *bss)
2903 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2904 int res, rates, i, j;
2905 struct sk_buff *skb;
2906 struct ieee80211_mgmt *mgmt;
2907 struct ieee80211_tx_control control;
2908 struct rate_selection ratesel;
2910 struct ieee80211_sub_if_data *sdata;
2911 struct ieee80211_supported_band *sband;
2913 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2915 /* Remove possible STA entries from other IBSS networks. */
2916 sta_info_flush(local, NULL);
2918 if (local->ops->reset_tsf) {
2919 /* Reset own TSF to allow time synchronization work. */
2920 local->ops->reset_tsf(local_to_hw(local));
2922 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2923 res = ieee80211_if_config(dev);
2927 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2929 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2930 sdata->drop_unencrypted = bss->capability &
2931 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2933 res = ieee80211_set_freq(local, bss->freq);
2935 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2936 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2937 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2941 /* Set beacon template based on scan results */
2942 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2947 skb_reserve(skb, local->hw.extra_tx_headroom);
2949 mgmt = (struct ieee80211_mgmt *)
2950 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2951 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2952 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2953 IEEE80211_STYPE_BEACON);
2954 memset(mgmt->da, 0xff, ETH_ALEN);
2955 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2956 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2957 mgmt->u.beacon.beacon_int =
2958 cpu_to_le16(local->hw.conf.beacon_int);
2959 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2961 pos = skb_put(skb, 2 + ifsta->ssid_len);
2962 *pos++ = WLAN_EID_SSID;
2963 *pos++ = ifsta->ssid_len;
2964 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2966 rates = bss->supp_rates_len;
2969 pos = skb_put(skb, 2 + rates);
2970 *pos++ = WLAN_EID_SUPP_RATES;
2972 memcpy(pos, bss->supp_rates, rates);
2974 if (bss->band == IEEE80211_BAND_2GHZ) {
2975 pos = skb_put(skb, 2 + 1);
2976 *pos++ = WLAN_EID_DS_PARAMS;
2978 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2981 pos = skb_put(skb, 2 + 2);
2982 *pos++ = WLAN_EID_IBSS_PARAMS;
2984 /* FIX: set ATIM window based on scan results */
2988 if (bss->supp_rates_len > 8) {
2989 rates = bss->supp_rates_len - 8;
2990 pos = skb_put(skb, 2 + rates);
2991 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2993 memcpy(pos, &bss->supp_rates[8], rates);
2996 memset(&control, 0, sizeof(control));
2997 rate_control_get_rate(dev, sband, skb, &ratesel);
2998 if (!ratesel.rate) {
2999 printk(KERN_DEBUG "%s: Failed to determine TX rate "
3000 "for IBSS beacon\n", dev->name);
3003 control.vif = &sdata->vif;
3004 control.tx_rate = ratesel.rate;
3005 if (sdata->bss_conf.use_short_preamble &&
3006 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
3007 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
3008 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
3009 control.flags |= IEEE80211_TXCTL_NO_ACK;
3010 control.retry_limit = 1;
3012 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
3013 if (ifsta->probe_resp) {
3014 mgmt = (struct ieee80211_mgmt *)
3015 ifsta->probe_resp->data;
3016 mgmt->frame_control =
3017 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
3018 IEEE80211_STYPE_PROBE_RESP);
3020 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
3021 "template for IBSS\n", dev->name);
3024 if (local->ops->beacon_update &&
3025 local->ops->beacon_update(local_to_hw(local),
3026 skb, &control) == 0) {
3027 printk(KERN_DEBUG "%s: Configured IBSS beacon "
3028 "template based on scan results\n", dev->name);
3033 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
3034 for (i = 0; i < bss->supp_rates_len; i++) {
3035 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
3036 for (j = 0; j < sband->n_bitrates; j++)
3037 if (sband->bitrates[j].bitrate == bitrate)
3040 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
3044 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3045 "template\n", dev->name);
3049 ifsta->state = IEEE80211_IBSS_JOINED;
3050 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3052 ieee80211_rx_bss_put(dev, bss);
3058 static int ieee80211_sta_create_ibss(struct net_device *dev,
3059 struct ieee80211_if_sta *ifsta)
3061 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3062 struct ieee80211_sta_bss *bss;
3063 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3064 struct ieee80211_supported_band *sband;
3065 u8 bssid[ETH_ALEN], *pos;
3067 DECLARE_MAC_BUF(mac);
3070 /* Easier testing, use fixed BSSID. */
3071 memset(bssid, 0xfe, ETH_ALEN);
3073 /* Generate random, not broadcast, locally administered BSSID. Mix in
3074 * own MAC address to make sure that devices that do not have proper
3075 * random number generator get different BSSID. */
3076 get_random_bytes(bssid, ETH_ALEN);
3077 for (i = 0; i < ETH_ALEN; i++)
3078 bssid[i] ^= dev->dev_addr[i];
3083 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3084 dev->name, print_mac(mac, bssid));
3086 bss = ieee80211_rx_bss_add(dev, bssid,
3087 local->hw.conf.channel->center_freq,
3088 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3092 bss->band = local->hw.conf.channel->band;
3093 sband = local->hw.wiphy->bands[bss->band];
3095 if (local->hw.conf.beacon_int == 0)
3096 local->hw.conf.beacon_int = 100;
3097 bss->beacon_int = local->hw.conf.beacon_int;
3098 bss->last_update = jiffies;
3099 bss->capability = WLAN_CAPABILITY_IBSS;
3100 if (sdata->default_key) {
3101 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3103 sdata->drop_unencrypted = 0;
3104 bss->supp_rates_len = sband->n_bitrates;
3105 pos = bss->supp_rates;
3106 for (i = 0; i < sband->n_bitrates; i++) {
3107 int rate = sband->bitrates[i].bitrate;
3108 *pos++ = (u8) (rate / 5);
3111 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3115 static int ieee80211_sta_find_ibss(struct net_device *dev,
3116 struct ieee80211_if_sta *ifsta)
3118 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3119 struct ieee80211_sta_bss *bss;
3123 DECLARE_MAC_BUF(mac);
3124 DECLARE_MAC_BUF(mac2);
3126 if (ifsta->ssid_len == 0)
3129 active_ibss = ieee80211_sta_active_ibss(dev);
3130 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3131 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3132 dev->name, active_ibss);
3133 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3134 spin_lock_bh(&local->sta_bss_lock);
3135 list_for_each_entry(bss, &local->sta_bss_list, list) {
3136 if (ifsta->ssid_len != bss->ssid_len ||
3137 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3138 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3140 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3141 printk(KERN_DEBUG " bssid=%s found\n",
3142 print_mac(mac, bss->bssid));
3143 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3144 memcpy(bssid, bss->bssid, ETH_ALEN);
3146 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3149 spin_unlock_bh(&local->sta_bss_lock);
3151 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3152 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3153 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3154 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3155 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3156 (bss = ieee80211_rx_bss_get(dev, bssid,
3157 local->hw.conf.channel->center_freq,
3158 ifsta->ssid, ifsta->ssid_len))) {
3159 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3160 " based on configured SSID\n",
3161 dev->name, print_mac(mac, bssid));
3162 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3164 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3165 printk(KERN_DEBUG " did not try to join ibss\n");
3166 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3168 /* Selected IBSS not found in current scan results - try to scan */
3169 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3170 !ieee80211_sta_active_ibss(dev)) {
3171 mod_timer(&ifsta->timer, jiffies +
3172 IEEE80211_IBSS_MERGE_INTERVAL);
3173 } else if (time_after(jiffies, local->last_scan_completed +
3174 IEEE80211_SCAN_INTERVAL)) {
3175 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3176 "join\n", dev->name);
3177 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3179 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3180 int interval = IEEE80211_SCAN_INTERVAL;
3182 if (time_after(jiffies, ifsta->ibss_join_req +
3183 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3184 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3185 (!(local->oper_channel->flags &
3186 IEEE80211_CHAN_NO_IBSS)))
3187 return ieee80211_sta_create_ibss(dev, ifsta);
3188 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3189 printk(KERN_DEBUG "%s: IBSS not allowed on"
3190 " %d MHz\n", dev->name,
3191 local->hw.conf.channel->center_freq);
3194 /* No IBSS found - decrease scan interval and continue
3196 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3199 ifsta->state = IEEE80211_IBSS_SEARCH;
3200 mod_timer(&ifsta->timer, jiffies + interval);
3208 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3210 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3211 struct ieee80211_if_sta *ifsta;
3212 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3214 if (len > IEEE80211_MAX_SSID_LEN)
3217 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3219 if (local->ops->conf_tx) {
3220 struct ieee80211_tx_queue_params qparam;
3223 memset(&qparam, 0, sizeof(qparam));
3227 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3228 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3233 qparam.cw_max = 1023;
3236 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3237 local->ops->conf_tx(local_to_hw(local),
3238 i + IEEE80211_TX_QUEUE_DATA0,
3241 /* IBSS uses different parameters for Beacon sending */
3245 local->ops->conf_tx(local_to_hw(local),
3246 IEEE80211_TX_QUEUE_BEACON, &qparam);
3249 ifsta = &sdata->u.sta;
3251 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3252 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3253 memcpy(ifsta->ssid, ssid, len);
3254 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3255 ifsta->ssid_len = len;
3258 ifsta->flags |= IEEE80211_STA_SSID_SET;
3260 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3261 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3262 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3263 ifsta->ibss_join_req = jiffies;
3264 ifsta->state = IEEE80211_IBSS_SEARCH;
3265 return ieee80211_sta_find_ibss(dev, ifsta);
3271 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3273 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3274 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3275 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3276 *len = ifsta->ssid_len;
3281 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3283 struct ieee80211_sub_if_data *sdata;
3284 struct ieee80211_if_sta *ifsta;
3287 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3288 ifsta = &sdata->u.sta;
3290 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3291 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3292 res = ieee80211_if_config(dev);
3294 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3295 "the low-level driver\n", dev->name);
3300 if (is_valid_ether_addr(bssid))
3301 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3303 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3309 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3310 struct ieee80211_sub_if_data *sdata,
3313 struct sk_buff *skb;
3314 struct ieee80211_hdr *nullfunc;
3317 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3319 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3320 "frame\n", sdata->dev->name);
3323 skb_reserve(skb, local->hw.extra_tx_headroom);
3325 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3326 memset(nullfunc, 0, 24);
3327 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3328 IEEE80211_FCTL_TODS;
3330 fc |= IEEE80211_FCTL_PM;
3331 nullfunc->frame_control = cpu_to_le16(fc);
3332 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3333 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3334 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3336 ieee80211_sta_tx(sdata->dev, skb, 0);
3340 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3342 struct ieee80211_local *local = hw_to_local(hw);
3343 struct net_device *dev = local->scan_dev;
3344 struct ieee80211_sub_if_data *sdata;
3345 union iwreq_data wrqu;
3347 local->last_scan_completed = jiffies;
3348 memset(&wrqu, 0, sizeof(wrqu));
3349 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3351 if (local->sta_hw_scanning) {
3352 local->sta_hw_scanning = 0;
3356 local->sta_sw_scanning = 0;
3357 if (ieee80211_hw_config(local))
3358 printk(KERN_DEBUG "%s: failed to restore operational "
3359 "channel after scan\n", dev->name);
3362 netif_tx_lock_bh(local->mdev);
3363 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3364 local->ops->configure_filter(local_to_hw(local),
3365 FIF_BCN_PRBRESP_PROMISC,
3366 &local->filter_flags,
3367 local->mdev->mc_count,
3368 local->mdev->mc_list);
3370 netif_tx_unlock_bh(local->mdev);
3373 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3375 /* No need to wake the master device. */
3376 if (sdata->dev == local->mdev)
3379 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3380 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3381 ieee80211_send_nullfunc(local, sdata, 0);
3382 ieee80211_sta_timer((unsigned long)sdata);
3385 netif_wake_queue(sdata->dev);
3390 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3391 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3392 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3393 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3394 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3395 !ieee80211_sta_active_ibss(dev)))
3396 ieee80211_sta_find_ibss(dev, ifsta);
3399 EXPORT_SYMBOL(ieee80211_scan_completed);
3401 void ieee80211_sta_scan_work(struct work_struct *work)
3403 struct ieee80211_local *local =
3404 container_of(work, struct ieee80211_local, scan_work.work);
3405 struct net_device *dev = local->scan_dev;
3406 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3407 struct ieee80211_supported_band *sband;
3408 struct ieee80211_channel *chan;
3410 unsigned long next_delay = 0;
3412 if (!local->sta_sw_scanning)
3415 switch (local->scan_state) {
3416 case SCAN_SET_CHANNEL:
3418 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3419 * after we successfully scanned the last channel of the last
3420 * band (and the last band is supported by the hw)
3422 if (local->scan_band < IEEE80211_NUM_BANDS)
3423 sband = local->hw.wiphy->bands[local->scan_band];
3428 * If we are at an unsupported band and have more bands
3429 * left to scan, advance to the next supported one.
3431 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3433 sband = local->hw.wiphy->bands[local->scan_band];
3434 local->scan_channel_idx = 0;
3437 /* if no more bands/channels left, complete scan */
3438 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3439 ieee80211_scan_completed(local_to_hw(local));
3443 chan = &sband->channels[local->scan_channel_idx];
3445 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3446 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3447 chan->flags & IEEE80211_CHAN_NO_IBSS))
3451 local->scan_channel = chan;
3452 if (ieee80211_hw_config(local)) {
3453 printk(KERN_DEBUG "%s: failed to set freq to "
3454 "%d MHz for scan\n", dev->name,
3460 /* advance state machine to next channel/band */
3461 local->scan_channel_idx++;
3462 if (local->scan_channel_idx >= sband->n_channels) {
3464 * scan_band may end up == IEEE80211_NUM_BANDS, but
3465 * we'll catch that case above and complete the scan
3466 * if that is the case.
3469 local->scan_channel_idx = 0;
3475 next_delay = IEEE80211_PROBE_DELAY +
3476 usecs_to_jiffies(local->hw.channel_change_time);
3477 local->scan_state = SCAN_SEND_PROBE;
3479 case SCAN_SEND_PROBE:
3480 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3481 local->scan_state = SCAN_SET_CHANNEL;
3483 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3485 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3486 local->scan_ssid_len);
3487 next_delay = IEEE80211_CHANNEL_TIME;
3491 if (local->sta_sw_scanning)
3492 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3497 static int ieee80211_sta_start_scan(struct net_device *dev,
3498 u8 *ssid, size_t ssid_len)
3500 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3501 struct ieee80211_sub_if_data *sdata;
3503 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3506 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3507 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3510 * ScanType: ACTIVE, PASSIVE
3511 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3512 * a Probe frame during active scanning
3514 * MinChannelTime (>= ProbeDelay), in TU
3515 * MaxChannelTime: (>= MinChannelTime), in TU
3518 /* MLME-SCAN.confirm
3520 * ResultCode: SUCCESS, INVALID_PARAMETERS
3523 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3524 if (local->scan_dev == dev)
3529 if (local->ops->hw_scan) {
3530 int rc = local->ops->hw_scan(local_to_hw(local),
3533 local->sta_hw_scanning = 1;
3534 local->scan_dev = dev;
3539 local->sta_sw_scanning = 1;
3542 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3544 /* Don't stop the master interface, otherwise we can't transmit
3546 if (sdata->dev == local->mdev)
3549 netif_stop_queue(sdata->dev);
3550 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3551 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3552 ieee80211_send_nullfunc(local, sdata, 1);
3557 local->scan_ssid_len = ssid_len;
3558 memcpy(local->scan_ssid, ssid, ssid_len);
3560 local->scan_ssid_len = 0;
3561 local->scan_state = SCAN_SET_CHANNEL;
3562 local->scan_channel_idx = 0;
3563 local->scan_band = IEEE80211_BAND_2GHZ;
3564 local->scan_dev = dev;
3566 netif_tx_lock_bh(local->mdev);
3567 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3568 local->ops->configure_filter(local_to_hw(local),
3569 FIF_BCN_PRBRESP_PROMISC,
3570 &local->filter_flags,
3571 local->mdev->mc_count,
3572 local->mdev->mc_list);
3573 netif_tx_unlock_bh(local->mdev);
3575 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3576 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3577 IEEE80211_CHANNEL_TIME);
3583 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3585 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3586 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3587 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3589 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3590 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3592 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3593 if (local->scan_dev == dev)
3598 ifsta->scan_ssid_len = ssid_len;
3600 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3601 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3602 queue_work(local->hw.workqueue, &ifsta->work);
3607 ieee80211_sta_scan_result(struct net_device *dev,
3608 struct ieee80211_sta_bss *bss,
3609 char *current_ev, char *end_buf)
3611 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3612 struct iw_event iwe;
3614 if (time_after(jiffies,
3615 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3618 memset(&iwe, 0, sizeof(iwe));
3619 iwe.cmd = SIOCGIWAP;
3620 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3621 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3622 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3625 memset(&iwe, 0, sizeof(iwe));
3626 iwe.cmd = SIOCGIWESSID;
3627 iwe.u.data.length = bss->ssid_len;
3628 iwe.u.data.flags = 1;
3629 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3632 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3633 memset(&iwe, 0, sizeof(iwe));
3634 iwe.cmd = SIOCGIWMODE;
3635 if (bss->capability & WLAN_CAPABILITY_ESS)
3636 iwe.u.mode = IW_MODE_MASTER;
3638 iwe.u.mode = IW_MODE_ADHOC;
3639 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3643 memset(&iwe, 0, sizeof(iwe));
3644 iwe.cmd = SIOCGIWFREQ;
3645 iwe.u.freq.m = bss->freq;
3647 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3650 memset(&iwe, 0, sizeof(iwe));
3651 iwe.cmd = SIOCGIWFREQ;
3652 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3654 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3657 memset(&iwe, 0, sizeof(iwe));
3659 iwe.u.qual.qual = bss->signal;
3660 iwe.u.qual.level = bss->rssi;
3661 iwe.u.qual.noise = bss->noise;
3662 iwe.u.qual.updated = local->wstats_flags;
3663 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3666 memset(&iwe, 0, sizeof(iwe));
3667 iwe.cmd = SIOCGIWENCODE;
3668 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3669 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3671 iwe.u.data.flags = IW_ENCODE_DISABLED;
3672 iwe.u.data.length = 0;
3673 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3675 if (bss && bss->wpa_ie) {
3676 memset(&iwe, 0, sizeof(iwe));
3677 iwe.cmd = IWEVGENIE;
3678 iwe.u.data.length = bss->wpa_ie_len;
3679 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3683 if (bss && bss->rsn_ie) {
3684 memset(&iwe, 0, sizeof(iwe));
3685 iwe.cmd = IWEVGENIE;
3686 iwe.u.data.length = bss->rsn_ie_len;
3687 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3691 if (bss && bss->supp_rates_len > 0) {
3692 /* display all supported rates in readable format */
3693 char *p = current_ev + IW_EV_LCP_LEN;
3696 memset(&iwe, 0, sizeof(iwe));
3697 iwe.cmd = SIOCGIWRATE;
3698 /* Those two flags are ignored... */
3699 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3701 for (i = 0; i < bss->supp_rates_len; i++) {
3702 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3704 p = iwe_stream_add_value(current_ev, p,
3705 end_buf, &iwe, IW_EV_PARAM_LEN);
3712 buf = kmalloc(30, GFP_ATOMIC);
3714 memset(&iwe, 0, sizeof(iwe));
3715 iwe.cmd = IWEVCUSTOM;
3716 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3717 iwe.u.data.length = strlen(buf);
3718 current_ev = iwe_stream_add_point(current_ev, end_buf,
3728 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3730 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3731 char *current_ev = buf;
3732 char *end_buf = buf + len;
3733 struct ieee80211_sta_bss *bss;
3735 spin_lock_bh(&local->sta_bss_lock);
3736 list_for_each_entry(bss, &local->sta_bss_list, list) {
3737 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3738 spin_unlock_bh(&local->sta_bss_lock);
3741 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3744 spin_unlock_bh(&local->sta_bss_lock);
3745 return current_ev - buf;
3749 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3751 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3752 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3753 kfree(ifsta->extra_ie);
3755 ifsta->extra_ie = NULL;
3756 ifsta->extra_ie_len = 0;
3759 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3760 if (!ifsta->extra_ie) {
3761 ifsta->extra_ie_len = 0;
3764 memcpy(ifsta->extra_ie, ie, len);
3765 ifsta->extra_ie_len = len;
3770 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3771 struct sk_buff *skb, u8 *bssid,
3774 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3775 struct sta_info *sta;
3776 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3777 DECLARE_MAC_BUF(mac);
3779 /* TODO: Could consider removing the least recently used entry and
3780 * allow new one to be added. */
3781 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3782 if (net_ratelimit()) {
3783 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3784 "entry %s\n", dev->name, print_mac(mac, addr));
3789 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3790 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3792 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3796 sta->flags |= WLAN_STA_AUTHORIZED;
3798 sta->supp_rates[local->hw.conf.channel->band] =
3799 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
3801 rate_control_rate_init(sta, local);
3803 return sta; /* caller will call sta_info_put() */
3807 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3809 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3810 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3812 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3815 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3816 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3819 ieee80211_send_deauth(dev, ifsta, reason);
3820 ieee80211_set_disassoc(dev, ifsta, 1);
3825 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3827 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3828 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3830 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3833 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3836 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3839 ieee80211_send_disassoc(dev, ifsta, reason);
3840 ieee80211_set_disassoc(dev, ifsta, 0);