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)
230 return (1 << ecw) - 1;
233 static void ieee80211_sta_wmm_params(struct net_device *dev,
234 struct ieee80211_if_sta *ifsta,
235 u8 *wmm_param, size_t wmm_param_len)
237 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
238 struct ieee80211_tx_queue_params params;
243 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
245 count = wmm_param[6] & 0x0f;
246 if (count == ifsta->wmm_last_param_set)
248 ifsta->wmm_last_param_set = count;
251 left = wmm_param_len - 8;
253 memset(¶ms, 0, sizeof(params));
255 if (!local->ops->conf_tx)
259 for (; left >= 4; left -= 4, pos += 4) {
260 int aci = (pos[0] >> 5) & 0x03;
261 int acm = (pos[0] >> 4) & 0x01;
266 queue = IEEE80211_TX_QUEUE_DATA3;
268 local->wmm_acm |= BIT(0) | BIT(3);
272 queue = IEEE80211_TX_QUEUE_DATA1;
274 local->wmm_acm |= BIT(4) | BIT(5);
278 queue = IEEE80211_TX_QUEUE_DATA0;
280 local->wmm_acm |= BIT(6) | BIT(7);
285 queue = IEEE80211_TX_QUEUE_DATA2;
287 local->wmm_acm |= BIT(1) | BIT(2);
292 params.aifs = pos[0] & 0x0f;
293 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
294 params.cw_min = ecw2cw(pos[1] & 0x0f);
295 params.txop = pos[2] | (pos[3] << 8);
296 #ifdef CONFIG_MAC80211_DEBUG
297 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
298 "cWmin=%d cWmax=%d txop=%d\n",
299 dev->name, queue, aci, acm, params.aifs, params.cw_min,
300 params.cw_max, params.txop);
302 /* TODO: handle ACM (block TX, fallback to next lowest allowed
304 if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) {
305 printk(KERN_DEBUG "%s: failed to set TX queue "
306 "parameters for queue %d\n", dev->name, queue);
312 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
315 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
316 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
317 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
318 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
319 DECLARE_MAC_BUF(mac);
322 if (use_protection != bss_conf->use_cts_prot) {
323 if (net_ratelimit()) {
324 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
327 use_protection ? "enabled" : "disabled",
328 print_mac(mac, ifsta->bssid));
330 bss_conf->use_cts_prot = use_protection;
331 changed |= BSS_CHANGED_ERP_CTS_PROT;
334 if (preamble_mode != bss_conf->use_short_preamble) {
335 if (net_ratelimit()) {
336 printk(KERN_DEBUG "%s: switched to %s barker preamble"
339 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
341 print_mac(mac, ifsta->bssid));
343 bss_conf->use_short_preamble = preamble_mode;
344 changed |= BSS_CHANGED_ERP_PREAMBLE;
350 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
351 struct ieee80211_ht_info *ht_info)
357 memset(ht_info, 0, sizeof(*ht_info));
360 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
362 ht_info->ht_supported = 1;
363 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
364 ht_info->ampdu_factor =
365 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
366 ht_info->ampdu_density =
367 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
368 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
370 ht_info->ht_supported = 0;
375 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
376 struct ieee80211_ht_addt_info *ht_add_info_ie,
377 struct ieee80211_ht_bss_info *bss_info)
379 if (bss_info == NULL)
382 memset(bss_info, 0, sizeof(*bss_info));
384 if (ht_add_info_ie) {
386 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
388 bss_info->primary_channel = ht_add_info_ie->control_chan;
389 bss_info->bss_cap = ht_add_info_ie->ht_param;
390 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
396 static void ieee80211_sta_send_associnfo(struct net_device *dev,
397 struct ieee80211_if_sta *ifsta)
402 union iwreq_data wrqu;
404 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
407 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
408 ifsta->assocresp_ies_len), GFP_KERNEL);
412 len = sprintf(buf, "ASSOCINFO(");
413 if (ifsta->assocreq_ies) {
414 len += sprintf(buf + len, "ReqIEs=");
415 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
416 len += sprintf(buf + len, "%02x",
417 ifsta->assocreq_ies[i]);
420 if (ifsta->assocresp_ies) {
421 if (ifsta->assocreq_ies)
422 len += sprintf(buf + len, " ");
423 len += sprintf(buf + len, "RespIEs=");
424 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
425 len += sprintf(buf + len, "%02x",
426 ifsta->assocresp_ies[i]);
429 len += sprintf(buf + len, ")");
431 if (len > IW_CUSTOM_MAX) {
432 len = sprintf(buf, "ASSOCRESPIE=");
433 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
434 len += sprintf(buf + len, "%02x",
435 ifsta->assocresp_ies[i]);
439 memset(&wrqu, 0, sizeof(wrqu));
440 wrqu.data.length = len;
441 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
447 static void ieee80211_set_associated(struct net_device *dev,
448 struct ieee80211_if_sta *ifsta,
451 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
452 struct ieee80211_local *local = sdata->local;
453 union iwreq_data wrqu;
454 u32 changed = BSS_CHANGED_ASSOC;
457 struct ieee80211_sta_bss *bss;
459 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
461 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
464 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
465 local->hw.conf.channel->center_freq,
466 ifsta->ssid, ifsta->ssid_len);
468 if (bss->has_erp_value)
469 changed |= ieee80211_handle_erp_ie(
470 sdata, bss->erp_value);
471 ieee80211_rx_bss_put(dev, bss);
474 netif_carrier_on(dev);
475 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
476 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
477 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
478 ieee80211_sta_send_associnfo(dev, ifsta);
480 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
482 netif_carrier_off(dev);
483 ieee80211_reset_erp_info(dev);
484 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
486 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
487 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
488 ifsta->last_probe = jiffies;
489 ieee80211_led_assoc(local, assoc);
491 sdata->bss_conf.assoc = assoc;
492 ieee80211_bss_info_change_notify(sdata, changed);
495 static void ieee80211_set_disassoc(struct net_device *dev,
496 struct ieee80211_if_sta *ifsta, int deauth)
499 ifsta->auth_tries = 0;
500 ifsta->assoc_tries = 0;
501 ieee80211_set_associated(dev, ifsta, 0);
504 static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
507 struct ieee80211_sub_if_data *sdata;
508 struct ieee80211_tx_packet_data *pkt_data;
510 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
511 skb->dev = sdata->local->mdev;
512 skb_set_mac_header(skb, 0);
513 skb_set_network_header(skb, 0);
514 skb_set_transport_header(skb, 0);
516 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
517 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
518 pkt_data->ifindex = sdata->dev->ifindex;
520 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
526 static void ieee80211_send_auth(struct net_device *dev,
527 struct ieee80211_if_sta *ifsta,
528 int transaction, u8 *extra, size_t extra_len,
531 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
533 struct ieee80211_mgmt *mgmt;
535 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
536 sizeof(*mgmt) + 6 + extra_len);
538 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
539 "frame\n", dev->name);
542 skb_reserve(skb, local->hw.extra_tx_headroom);
544 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
545 memset(mgmt, 0, 24 + 6);
546 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
547 IEEE80211_STYPE_AUTH);
549 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
550 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
551 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
552 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
553 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
554 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
555 ifsta->auth_transaction = transaction + 1;
556 mgmt->u.auth.status_code = cpu_to_le16(0);
558 memcpy(skb_put(skb, extra_len), extra, extra_len);
560 ieee80211_sta_tx(dev, skb, encrypt);
564 static void ieee80211_authenticate(struct net_device *dev,
565 struct ieee80211_if_sta *ifsta)
567 DECLARE_MAC_BUF(mac);
570 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
571 printk(KERN_DEBUG "%s: authentication with AP %s"
573 dev->name, print_mac(mac, ifsta->bssid));
574 ifsta->state = IEEE80211_DISABLED;
578 ifsta->state = IEEE80211_AUTHENTICATE;
579 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
580 dev->name, print_mac(mac, ifsta->bssid));
582 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
584 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
588 static void ieee80211_send_assoc(struct net_device *dev,
589 struct ieee80211_if_sta *ifsta)
591 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
593 struct ieee80211_mgmt *mgmt;
597 struct ieee80211_sta_bss *bss;
599 struct ieee80211_supported_band *sband;
601 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
602 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
605 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
606 "frame\n", dev->name);
609 skb_reserve(skb, local->hw.extra_tx_headroom);
611 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
613 capab = ifsta->capab;
615 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
616 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
617 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
618 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
619 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
622 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
623 local->hw.conf.channel->center_freq,
624 ifsta->ssid, ifsta->ssid_len);
626 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
627 capab |= WLAN_CAPABILITY_PRIVACY;
631 ieee80211_rx_bss_put(dev, bss);
634 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
636 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
637 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
638 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
640 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
642 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
643 IEEE80211_STYPE_REASSOC_REQ);
644 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
645 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
646 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
650 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
651 IEEE80211_STYPE_ASSOC_REQ);
652 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
653 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
657 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
658 *pos++ = WLAN_EID_SSID;
659 *pos++ = ifsta->ssid_len;
660 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
662 len = sband->n_bitrates;
665 pos = skb_put(skb, len + 2);
666 *pos++ = WLAN_EID_SUPP_RATES;
668 for (i = 0; i < len; i++) {
669 int rate = sband->bitrates[i].bitrate;
670 *pos++ = (u8) (rate / 5);
673 if (sband->n_bitrates > len) {
674 pos = skb_put(skb, sband->n_bitrates - len + 2);
675 *pos++ = WLAN_EID_EXT_SUPP_RATES;
676 *pos++ = sband->n_bitrates - len;
677 for (i = len; i < sband->n_bitrates; i++) {
678 int rate = sband->bitrates[i].bitrate;
679 *pos++ = (u8) (rate / 5);
683 if (ifsta->extra_ie) {
684 pos = skb_put(skb, ifsta->extra_ie_len);
685 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
688 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
689 pos = skb_put(skb, 9);
690 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
691 *pos++ = 7; /* len */
692 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
695 *pos++ = 2; /* WME */
696 *pos++ = 0; /* WME info */
697 *pos++ = 1; /* WME ver */
700 /* wmm support is a must to HT */
701 if (wmm && sband->ht_info.ht_supported) {
702 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
703 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
704 *pos++ = WLAN_EID_HT_CAPABILITY;
705 *pos++ = sizeof(struct ieee80211_ht_cap);
706 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
707 memcpy(pos, &tmp, sizeof(u16));
709 /* TODO: needs a define here for << 2 */
710 *pos++ = sband->ht_info.ampdu_factor |
711 (sband->ht_info.ampdu_density << 2);
712 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
715 kfree(ifsta->assocreq_ies);
716 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
717 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
718 if (ifsta->assocreq_ies)
719 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
721 ieee80211_sta_tx(dev, skb, 0);
725 static void ieee80211_send_deauth(struct net_device *dev,
726 struct ieee80211_if_sta *ifsta, u16 reason)
728 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
730 struct ieee80211_mgmt *mgmt;
732 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
734 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
735 "frame\n", dev->name);
738 skb_reserve(skb, local->hw.extra_tx_headroom);
740 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
742 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
743 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
744 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
745 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
746 IEEE80211_STYPE_DEAUTH);
748 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
750 ieee80211_sta_tx(dev, skb, 0);
754 static void ieee80211_send_disassoc(struct net_device *dev,
755 struct ieee80211_if_sta *ifsta, u16 reason)
757 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
759 struct ieee80211_mgmt *mgmt;
761 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
763 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
764 "frame\n", dev->name);
767 skb_reserve(skb, local->hw.extra_tx_headroom);
769 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
771 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
772 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
773 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
774 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
775 IEEE80211_STYPE_DISASSOC);
777 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
779 ieee80211_sta_tx(dev, skb, 0);
783 static int ieee80211_privacy_mismatch(struct net_device *dev,
784 struct ieee80211_if_sta *ifsta)
786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
787 struct ieee80211_sta_bss *bss;
792 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
795 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
796 local->hw.conf.channel->center_freq,
797 ifsta->ssid, ifsta->ssid_len);
801 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
802 wep_privacy = !!ieee80211_sta_wep_configured(dev);
803 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
805 ieee80211_rx_bss_put(dev, bss);
807 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
814 static void ieee80211_associate(struct net_device *dev,
815 struct ieee80211_if_sta *ifsta)
817 DECLARE_MAC_BUF(mac);
819 ifsta->assoc_tries++;
820 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
821 printk(KERN_DEBUG "%s: association with AP %s"
823 dev->name, print_mac(mac, ifsta->bssid));
824 ifsta->state = IEEE80211_DISABLED;
828 ifsta->state = IEEE80211_ASSOCIATE;
829 printk(KERN_DEBUG "%s: associate with AP %s\n",
830 dev->name, print_mac(mac, ifsta->bssid));
831 if (ieee80211_privacy_mismatch(dev, ifsta)) {
832 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
833 "mixed-cell disabled - abort association\n", dev->name);
834 ifsta->state = IEEE80211_DISABLED;
838 ieee80211_send_assoc(dev, ifsta);
840 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
844 static void ieee80211_associated(struct net_device *dev,
845 struct ieee80211_if_sta *ifsta)
847 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
848 struct sta_info *sta;
850 DECLARE_MAC_BUF(mac);
852 /* TODO: start monitoring current AP signal quality and number of
853 * missed beacons. Scan other channels every now and then and search
855 /* TODO: remove expired BSSes */
857 ifsta->state = IEEE80211_ASSOCIATED;
859 sta = sta_info_get(local, ifsta->bssid);
861 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
862 dev->name, print_mac(mac, ifsta->bssid));
866 if (time_after(jiffies,
867 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
868 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
869 printk(KERN_DEBUG "%s: No ProbeResp from "
870 "current AP %s - assume out of "
872 dev->name, print_mac(mac, ifsta->bssid));
876 ieee80211_send_probe_req(dev, ifsta->bssid,
878 local->scan_ssid_len);
879 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
881 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
882 if (time_after(jiffies, ifsta->last_probe +
883 IEEE80211_PROBE_INTERVAL)) {
884 ifsta->last_probe = jiffies;
885 ieee80211_send_probe_req(dev, ifsta->bssid,
893 ifsta->state = IEEE80211_DISABLED;
894 ieee80211_set_associated(dev, ifsta, 0);
896 mod_timer(&ifsta->timer, jiffies +
897 IEEE80211_MONITORING_INTERVAL);
902 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
903 u8 *ssid, size_t ssid_len)
905 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
906 struct ieee80211_supported_band *sband;
908 struct ieee80211_mgmt *mgmt;
909 u8 *pos, *supp_rates, *esupp_rates = NULL;
912 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
914 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
915 "request\n", dev->name);
918 skb_reserve(skb, local->hw.extra_tx_headroom);
920 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
922 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
923 IEEE80211_STYPE_PROBE_REQ);
924 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
926 memcpy(mgmt->da, dst, ETH_ALEN);
927 memcpy(mgmt->bssid, dst, ETH_ALEN);
929 memset(mgmt->da, 0xff, ETH_ALEN);
930 memset(mgmt->bssid, 0xff, ETH_ALEN);
932 pos = skb_put(skb, 2 + ssid_len);
933 *pos++ = WLAN_EID_SSID;
935 memcpy(pos, ssid, ssid_len);
937 supp_rates = skb_put(skb, 2);
938 supp_rates[0] = WLAN_EID_SUPP_RATES;
940 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
942 for (i = 0; i < sband->n_bitrates; i++) {
943 struct ieee80211_rate *rate = &sband->bitrates[i];
945 pos = skb_put(skb, 1);
947 } else if (supp_rates[1] == 8) {
948 esupp_rates = skb_put(skb, 3);
949 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
951 pos = &esupp_rates[2];
953 pos = skb_put(skb, 1);
956 *pos = rate->bitrate / 5;
959 ieee80211_sta_tx(dev, skb, 0);
963 static int ieee80211_sta_wep_configured(struct net_device *dev)
965 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
966 if (!sdata || !sdata->default_key ||
967 sdata->default_key->conf.alg != ALG_WEP)
973 static void ieee80211_auth_completed(struct net_device *dev,
974 struct ieee80211_if_sta *ifsta)
976 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
977 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
978 ieee80211_associate(dev, ifsta);
982 static void ieee80211_auth_challenge(struct net_device *dev,
983 struct ieee80211_if_sta *ifsta,
984 struct ieee80211_mgmt *mgmt,
988 struct ieee802_11_elems elems;
990 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
991 pos = mgmt->u.auth.variable;
992 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
993 if (!elems.challenge) {
994 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
995 "frame\n", dev->name);
998 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
999 elems.challenge_len + 2, 1);
1002 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1003 u8 dialog_token, u16 status, u16 policy,
1004 u16 buf_size, u16 timeout)
1006 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1008 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1009 struct sk_buff *skb;
1010 struct ieee80211_mgmt *mgmt;
1013 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1014 sizeof(mgmt->u.action.u.addba_resp));
1016 printk(KERN_DEBUG "%s: failed to allocate buffer "
1017 "for addba resp frame\n", dev->name);
1021 skb_reserve(skb, local->hw.extra_tx_headroom);
1022 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1023 memset(mgmt, 0, 24);
1024 memcpy(mgmt->da, da, ETH_ALEN);
1025 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1026 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1027 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1029 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1030 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1031 IEEE80211_STYPE_ACTION);
1033 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1034 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1035 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1036 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1038 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1039 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1040 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1042 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1043 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1044 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1046 ieee80211_sta_tx(dev, skb, 0);
1051 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1052 u16 tid, u8 dialog_token, u16 start_seq_num,
1053 u16 agg_size, u16 timeout)
1055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1056 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1057 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1058 struct sk_buff *skb;
1059 struct ieee80211_mgmt *mgmt;
1062 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1063 sizeof(mgmt->u.action.u.addba_req));
1067 printk(KERN_ERR "%s: failed to allocate buffer "
1068 "for addba request frame\n", dev->name);
1071 skb_reserve(skb, local->hw.extra_tx_headroom);
1072 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1073 memset(mgmt, 0, 24);
1074 memcpy(mgmt->da, da, ETH_ALEN);
1075 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1076 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1077 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1079 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1081 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1082 IEEE80211_STYPE_ACTION);
1084 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1086 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1087 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1089 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1090 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1091 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1092 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1094 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1096 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1097 mgmt->u.action.u.addba_req.start_seq_num =
1098 cpu_to_le16(start_seq_num << 4);
1100 ieee80211_sta_tx(dev, skb, 0);
1103 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1104 struct ieee80211_mgmt *mgmt,
1107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1108 struct ieee80211_hw *hw = &local->hw;
1109 struct ieee80211_conf *conf = &hw->conf;
1110 struct sta_info *sta;
1111 struct tid_ampdu_rx *tid_agg_rx;
1112 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1114 int ret = -EOPNOTSUPP;
1115 DECLARE_MAC_BUF(mac);
1117 sta = sta_info_get(local, mgmt->sa);
1121 /* extract session parameters from addba request frame */
1122 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1123 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1125 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1127 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1128 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1129 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1130 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1132 status = WLAN_STATUS_REQUEST_DECLINED;
1134 /* sanity check for incoming parameters:
1135 * check if configuration can support the BA policy
1136 * and if buffer size does not exceeds max value */
1137 if (((ba_policy != 1)
1138 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1139 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1140 status = WLAN_STATUS_INVALID_QOS_PARAM;
1141 #ifdef CONFIG_MAC80211_HT_DEBUG
1142 if (net_ratelimit())
1143 printk(KERN_DEBUG "Block Ack Req with bad params from "
1144 "%s on tid %u. policy %d, buffer size %d\n",
1145 print_mac(mac, mgmt->sa), tid, ba_policy,
1147 #endif /* CONFIG_MAC80211_HT_DEBUG */
1150 /* determine default buffer size */
1151 if (buf_size == 0) {
1152 struct ieee80211_supported_band *sband;
1154 sband = local->hw.wiphy->bands[conf->channel->band];
1155 buf_size = IEEE80211_MIN_AMPDU_BUF;
1156 buf_size = buf_size << sband->ht_info.ampdu_factor;
1159 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1161 /* examine state machine */
1162 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1164 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1165 #ifdef CONFIG_MAC80211_HT_DEBUG
1166 if (net_ratelimit())
1167 printk(KERN_DEBUG "unexpected Block Ack Req from "
1169 print_mac(mac, mgmt->sa), tid);
1170 #endif /* CONFIG_MAC80211_HT_DEBUG */
1174 /* prepare reordering buffer */
1175 tid_agg_rx->reorder_buf =
1176 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1177 if (!tid_agg_rx->reorder_buf) {
1178 if (net_ratelimit())
1179 printk(KERN_ERR "can not allocate reordering buffer "
1180 "to tid %d\n", tid);
1183 memset(tid_agg_rx->reorder_buf, 0,
1184 buf_size * sizeof(struct sk_buf *));
1186 if (local->ops->ampdu_action)
1187 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1188 sta->addr, tid, &start_seq_num);
1189 #ifdef CONFIG_MAC80211_HT_DEBUG
1190 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1191 #endif /* CONFIG_MAC80211_HT_DEBUG */
1194 kfree(tid_agg_rx->reorder_buf);
1198 /* change state and send addba resp */
1199 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1200 tid_agg_rx->dialog_token = dialog_token;
1201 tid_agg_rx->ssn = start_seq_num;
1202 tid_agg_rx->head_seq_num = start_seq_num;
1203 tid_agg_rx->buf_size = buf_size;
1204 tid_agg_rx->timeout = timeout;
1205 tid_agg_rx->stored_mpdu_num = 0;
1206 status = WLAN_STATUS_SUCCESS;
1208 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1211 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1212 status, 1, buf_size, timeout);
1216 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1217 struct ieee80211_mgmt *mgmt,
1220 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1221 struct ieee80211_hw *hw = &local->hw;
1222 struct sta_info *sta;
1227 sta = sta_info_get(local, mgmt->sa);
1231 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1232 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1234 state = &sta->ampdu_mlme.tid_tx[tid].state;
1236 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1238 if (mgmt->u.action.u.addba_resp.dialog_token !=
1239 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1240 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1241 #ifdef CONFIG_MAC80211_HT_DEBUG
1242 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1243 #endif /* CONFIG_MAC80211_HT_DEBUG */
1248 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1249 #ifdef CONFIG_MAC80211_HT_DEBUG
1250 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1251 #endif /* CONFIG_MAC80211_HT_DEBUG */
1252 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1253 == WLAN_STATUS_SUCCESS) {
1254 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1255 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1256 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1262 if (*state & HT_ADDBA_RECEIVED_MSK)
1263 printk(KERN_DEBUG "double addBA response\n");
1265 *state |= HT_ADDBA_RECEIVED_MSK;
1266 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1268 if (*state == HT_AGG_STATE_OPERATIONAL) {
1269 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1270 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1273 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1274 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1276 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1278 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1279 /* this will allow the state check in stop_BA_session */
1280 *state = HT_AGG_STATE_OPERATIONAL;
1281 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1282 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1283 WLAN_BACK_INITIATOR);
1288 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1289 u16 initiator, u16 reason_code)
1291 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1292 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1293 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1294 struct sk_buff *skb;
1295 struct ieee80211_mgmt *mgmt;
1298 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1299 sizeof(mgmt->u.action.u.delba));
1302 printk(KERN_ERR "%s: failed to allocate buffer "
1303 "for delba frame\n", dev->name);
1307 skb_reserve(skb, local->hw.extra_tx_headroom);
1308 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1309 memset(mgmt, 0, 24);
1310 memcpy(mgmt->da, da, ETH_ALEN);
1311 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1312 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1313 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1315 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1316 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1317 IEEE80211_STYPE_ACTION);
1319 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1321 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1322 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1323 params = (u16)(initiator << 11); /* bit 11 initiator */
1324 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1326 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1327 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1329 ieee80211_sta_tx(dev, skb, 0);
1332 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1333 u16 initiator, u16 reason)
1335 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1336 struct ieee80211_hw *hw = &local->hw;
1337 struct sta_info *sta;
1340 sta = sta_info_get(local, ra);
1344 /* check if TID is in operational state */
1345 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1346 if (sta->ampdu_mlme.tid_rx[tid].state
1347 != HT_AGG_STATE_OPERATIONAL) {
1348 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1352 sta->ampdu_mlme.tid_rx[tid].state =
1353 HT_AGG_STATE_REQ_STOP_BA_MSK |
1354 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1355 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1357 /* stop HW Rx aggregation. ampdu_action existence
1358 * already verified in session init so we add the BUG_ON */
1359 BUG_ON(!local->ops->ampdu_action);
1361 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1364 printk(KERN_DEBUG "HW problem - can not stop rx "
1365 "aggergation for tid %d\n", tid);
1367 /* shutdown timer has not expired */
1368 if (initiator != WLAN_BACK_TIMER)
1369 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1372 /* check if this is a self generated aggregation halt */
1373 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1374 ieee80211_send_delba(dev, ra, tid, 0, reason);
1376 /* free the reordering buffer */
1377 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1378 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1379 /* release the reordered frames */
1380 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1381 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1382 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1385 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1387 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1392 static void ieee80211_sta_process_delba(struct net_device *dev,
1393 struct ieee80211_mgmt *mgmt, size_t len)
1395 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1396 struct sta_info *sta;
1399 DECLARE_MAC_BUF(mac);
1401 sta = sta_info_get(local, mgmt->sa);
1405 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1406 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1407 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1409 #ifdef CONFIG_MAC80211_HT_DEBUG
1410 if (net_ratelimit())
1411 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1412 print_mac(mac, mgmt->sa),
1413 initiator ? "recipient" : "initiator", tid,
1414 mgmt->u.action.u.delba.reason_code);
1415 #endif /* CONFIG_MAC80211_HT_DEBUG */
1417 if (initiator == WLAN_BACK_INITIATOR)
1418 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1419 WLAN_BACK_INITIATOR, 0);
1420 else { /* WLAN_BACK_RECIPIENT */
1421 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1422 sta->ampdu_mlme.tid_tx[tid].state =
1423 HT_AGG_STATE_OPERATIONAL;
1424 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1425 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1426 WLAN_BACK_RECIPIENT);
1432 * After sending add Block Ack request we activated a timer until
1433 * add Block Ack response will arrive from the recipient.
1434 * If this timer expires sta_addba_resp_timer_expired will be executed.
1436 void sta_addba_resp_timer_expired(unsigned long data)
1438 /* not an elegant detour, but there is no choice as the timer passes
1439 * only one argument, and both sta_info and TID are needed, so init
1440 * flow in sta_info_add gives the TID as data, while the timer_to_id
1441 * array gives the sta through container_of */
1442 u16 tid = *(int *)data;
1443 struct sta_info *temp_sta = container_of((void *)data,
1444 struct sta_info, timer_to_tid[tid]);
1446 struct ieee80211_local *local = temp_sta->local;
1447 struct ieee80211_hw *hw = &local->hw;
1448 struct sta_info *sta;
1451 sta = sta_info_get(local, temp_sta->addr);
1455 state = &sta->ampdu_mlme.tid_tx[tid].state;
1456 /* check if the TID waits for addBA response */
1457 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1458 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1459 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1460 *state = HT_AGG_STATE_IDLE;
1461 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1462 "expecting addBA response there", tid);
1463 goto timer_expired_exit;
1466 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1468 /* go through the state check in stop_BA_session */
1469 *state = HT_AGG_STATE_OPERATIONAL;
1470 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1471 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1472 WLAN_BACK_INITIATOR);
1479 * After receiving Block Ack Request (BAR) we activated a
1480 * timer after each frame arrives from the originator.
1481 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1483 void sta_rx_agg_session_timer_expired(unsigned long data)
1485 /* not an elegant detour, but there is no choice as the timer passes
1486 * only one argument, and verious sta_info are needed here, so init
1487 * flow in sta_info_add gives the TID as data, while the timer_to_id
1488 * array gives the sta through container_of */
1489 u8 *ptid = (u8 *)data;
1490 u8 *timer_to_id = ptid - *ptid;
1491 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1494 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1495 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1497 WLAN_REASON_QSTA_TIMEOUT);
1501 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1502 struct ieee80211_if_sta *ifsta,
1503 struct ieee80211_mgmt *mgmt,
1506 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1507 u16 auth_alg, auth_transaction, status_code;
1508 DECLARE_MAC_BUF(mac);
1510 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1511 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1512 printk(KERN_DEBUG "%s: authentication frame received from "
1513 "%s, but not in authenticate state - ignored\n",
1514 dev->name, print_mac(mac, mgmt->sa));
1519 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1520 "received from %s - ignored\n",
1521 dev->name, len, print_mac(mac, mgmt->sa));
1525 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1526 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1527 printk(KERN_DEBUG "%s: authentication frame received from "
1528 "unknown AP (SA=%s BSSID=%s) - "
1529 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1530 print_mac(mac, mgmt->bssid));
1534 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1535 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1536 printk(KERN_DEBUG "%s: authentication frame received from "
1537 "unknown BSSID (SA=%s BSSID=%s) - "
1538 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1539 print_mac(mac, mgmt->bssid));
1543 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1544 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1545 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1547 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1548 "transaction=%d status=%d)\n",
1549 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1550 auth_transaction, status_code);
1552 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1553 /* IEEE 802.11 standard does not require authentication in IBSS
1554 * networks and most implementations do not seem to use it.
1555 * However, try to reply to authentication attempts if someone
1556 * has actually implemented this.
1557 * TODO: Could implement shared key authentication. */
1558 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1559 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1560 "frame (alg=%d transaction=%d)\n",
1561 dev->name, auth_alg, auth_transaction);
1564 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1567 if (auth_alg != ifsta->auth_alg ||
1568 auth_transaction != ifsta->auth_transaction) {
1569 printk(KERN_DEBUG "%s: unexpected authentication frame "
1570 "(alg=%d transaction=%d)\n",
1571 dev->name, auth_alg, auth_transaction);
1575 if (status_code != WLAN_STATUS_SUCCESS) {
1576 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1577 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1578 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1580 const int num_algs = ARRAY_SIZE(algs);
1582 algs[0] = algs[1] = algs[2] = 0xff;
1583 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1584 algs[0] = WLAN_AUTH_OPEN;
1585 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1586 algs[1] = WLAN_AUTH_SHARED_KEY;
1587 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1588 algs[2] = WLAN_AUTH_LEAP;
1589 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1591 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1595 for (i = 0; i < num_algs; i++) {
1597 if (pos >= num_algs)
1599 if (algs[pos] == ifsta->auth_alg ||
1602 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1603 !ieee80211_sta_wep_configured(dev))
1605 ifsta->auth_alg = algs[pos];
1606 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1608 dev->name, ifsta->auth_alg);
1615 switch (ifsta->auth_alg) {
1616 case WLAN_AUTH_OPEN:
1617 case WLAN_AUTH_LEAP:
1618 ieee80211_auth_completed(dev, ifsta);
1620 case WLAN_AUTH_SHARED_KEY:
1621 if (ifsta->auth_transaction == 4)
1622 ieee80211_auth_completed(dev, ifsta);
1624 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1630 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1631 struct ieee80211_if_sta *ifsta,
1632 struct ieee80211_mgmt *mgmt,
1636 DECLARE_MAC_BUF(mac);
1639 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1640 "received from %s - ignored\n",
1641 dev->name, len, print_mac(mac, mgmt->sa));
1645 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1646 printk(KERN_DEBUG "%s: deauthentication frame received from "
1647 "unknown AP (SA=%s BSSID=%s) - "
1648 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1649 print_mac(mac, mgmt->bssid));
1653 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1655 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1657 dev->name, print_mac(mac, mgmt->sa), reason_code);
1659 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1660 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1663 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1664 ifsta->state == IEEE80211_ASSOCIATE ||
1665 ifsta->state == IEEE80211_ASSOCIATED) {
1666 ifsta->state = IEEE80211_AUTHENTICATE;
1667 mod_timer(&ifsta->timer, jiffies +
1668 IEEE80211_RETRY_AUTH_INTERVAL);
1671 ieee80211_set_disassoc(dev, ifsta, 1);
1672 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1676 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1677 struct ieee80211_if_sta *ifsta,
1678 struct ieee80211_mgmt *mgmt,
1682 DECLARE_MAC_BUF(mac);
1685 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1686 "received from %s - ignored\n",
1687 dev->name, len, print_mac(mac, mgmt->sa));
1691 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1692 printk(KERN_DEBUG "%s: disassociation frame received from "
1693 "unknown AP (SA=%s BSSID=%s) - "
1694 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1695 print_mac(mac, mgmt->bssid));
1699 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1701 printk(KERN_DEBUG "%s: RX disassociation from %s"
1703 dev->name, print_mac(mac, mgmt->sa), reason_code);
1705 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1706 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1708 if (ifsta->state == IEEE80211_ASSOCIATED) {
1709 ifsta->state = IEEE80211_ASSOCIATE;
1710 mod_timer(&ifsta->timer, jiffies +
1711 IEEE80211_RETRY_AUTH_INTERVAL);
1714 ieee80211_set_disassoc(dev, ifsta, 0);
1718 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1719 struct ieee80211_if_sta *ifsta,
1720 struct ieee80211_mgmt *mgmt,
1724 struct ieee80211_local *local = sdata->local;
1725 struct net_device *dev = sdata->dev;
1726 struct ieee80211_supported_band *sband;
1727 struct sta_info *sta;
1728 u64 rates, basic_rates;
1729 u16 capab_info, status_code, aid;
1730 struct ieee802_11_elems elems;
1731 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1734 DECLARE_MAC_BUF(mac);
1735 bool have_higher_than_11mbit = false;
1737 /* AssocResp and ReassocResp have identical structure, so process both
1738 * of them in this function. */
1740 if (ifsta->state != IEEE80211_ASSOCIATE) {
1741 printk(KERN_DEBUG "%s: association frame received from "
1742 "%s, but not in associate state - ignored\n",
1743 dev->name, print_mac(mac, mgmt->sa));
1748 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1749 "received from %s - ignored\n",
1750 dev->name, len, print_mac(mac, mgmt->sa));
1754 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1755 printk(KERN_DEBUG "%s: association frame received from "
1756 "unknown AP (SA=%s BSSID=%s) - "
1757 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1758 print_mac(mac, mgmt->bssid));
1762 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1763 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1764 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1766 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1767 "status=%d aid=%d)\n",
1768 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1769 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1771 if (status_code != WLAN_STATUS_SUCCESS) {
1772 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1773 dev->name, status_code);
1774 /* if this was a reassociation, ensure we try a "full"
1775 * association next time. This works around some broken APs
1776 * which do not correctly reject reassociation requests. */
1777 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1781 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1782 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1783 "set\n", dev->name, aid);
1784 aid &= ~(BIT(15) | BIT(14));
1786 pos = mgmt->u.assoc_resp.variable;
1787 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1789 if (!elems.supp_rates) {
1790 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1795 printk(KERN_DEBUG "%s: associated\n", dev->name);
1797 ifsta->ap_capab = capab_info;
1799 kfree(ifsta->assocresp_ies);
1800 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1801 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1802 if (ifsta->assocresp_ies)
1803 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1805 /* Add STA entry for the AP */
1806 sta = sta_info_get(local, ifsta->bssid);
1808 struct ieee80211_sta_bss *bss;
1809 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
1811 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1812 " AP (error %ld)\n", dev->name, PTR_ERR(sta));
1815 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1816 local->hw.conf.channel->center_freq,
1817 ifsta->ssid, ifsta->ssid_len);
1819 sta->last_rssi = bss->rssi;
1820 sta->last_signal = bss->signal;
1821 sta->last_noise = bss->noise;
1822 ieee80211_rx_bss_put(dev, bss);
1827 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1828 WLAN_STA_AUTHORIZED;
1832 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1834 for (i = 0; i < elems.supp_rates_len; i++) {
1835 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1838 have_higher_than_11mbit = true;
1840 for (j = 0; j < sband->n_bitrates; j++) {
1841 if (sband->bitrates[j].bitrate == rate)
1843 if (elems.supp_rates[i] & 0x80)
1844 basic_rates |= BIT(j);
1848 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1849 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1852 have_higher_than_11mbit = true;
1854 for (j = 0; j < sband->n_bitrates; j++) {
1855 if (sband->bitrates[j].bitrate == rate)
1857 if (elems.ext_supp_rates[i] & 0x80)
1858 basic_rates |= BIT(j);
1862 sta->supp_rates[local->hw.conf.channel->band] = rates;
1863 sdata->basic_rates = basic_rates;
1865 /* cf. IEEE 802.11 9.2.12 */
1866 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1867 have_higher_than_11mbit)
1868 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1870 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
1872 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1873 local->ops->conf_ht) {
1874 struct ieee80211_ht_bss_info bss_info;
1876 ieee80211_ht_cap_ie_to_ht_info(
1877 (struct ieee80211_ht_cap *)
1878 elems.ht_cap_elem, &sta->ht_info);
1879 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1880 (struct ieee80211_ht_addt_info *)
1881 elems.ht_info_elem, &bss_info);
1882 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1885 rate_control_rate_init(sta, local);
1887 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
1888 sta->flags |= WLAN_STA_WME;
1889 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1890 elems.wmm_param_len);
1893 /* set AID, ieee80211_set_associated() will tell the driver */
1894 bss_conf->aid = aid;
1895 ieee80211_set_associated(dev, ifsta, 1);
1899 ieee80211_associated(dev, ifsta);
1903 /* Caller must hold local->sta_bss_lock */
1904 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1905 struct ieee80211_sta_bss *bss)
1907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1908 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1909 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1913 /* Caller must hold local->sta_bss_lock */
1914 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1915 struct ieee80211_sta_bss *bss)
1917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1918 struct ieee80211_sta_bss *b, *prev = NULL;
1919 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1923 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1926 prev->hnext = bss->hnext;
1935 static struct ieee80211_sta_bss *
1936 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
1937 u8 *ssid, u8 ssid_len)
1939 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1940 struct ieee80211_sta_bss *bss;
1942 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
1945 atomic_inc(&bss->users);
1946 atomic_inc(&bss->users);
1947 memcpy(bss->bssid, bssid, ETH_ALEN);
1949 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1950 memcpy(bss->ssid, ssid, ssid_len);
1951 bss->ssid_len = ssid_len;
1954 spin_lock_bh(&local->sta_bss_lock);
1955 /* TODO: order by RSSI? */
1956 list_add_tail(&bss->list, &local->sta_bss_list);
1957 __ieee80211_rx_bss_hash_add(dev, bss);
1958 spin_unlock_bh(&local->sta_bss_lock);
1963 static struct ieee80211_sta_bss *
1964 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
1965 u8 *ssid, u8 ssid_len)
1967 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1968 struct ieee80211_sta_bss *bss;
1970 spin_lock_bh(&local->sta_bss_lock);
1971 bss = local->sta_bss_hash[STA_HASH(bssid)];
1973 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1974 bss->freq == freq &&
1975 bss->ssid_len == ssid_len &&
1976 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
1977 atomic_inc(&bss->users);
1982 spin_unlock_bh(&local->sta_bss_lock);
1987 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1997 static void ieee80211_rx_bss_put(struct net_device *dev,
1998 struct ieee80211_sta_bss *bss)
2000 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2001 if (!atomic_dec_and_test(&bss->users))
2004 spin_lock_bh(&local->sta_bss_lock);
2005 __ieee80211_rx_bss_hash_del(dev, bss);
2006 list_del(&bss->list);
2007 spin_unlock_bh(&local->sta_bss_lock);
2008 ieee80211_rx_bss_free(bss);
2012 void ieee80211_rx_bss_list_init(struct net_device *dev)
2014 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2015 spin_lock_init(&local->sta_bss_lock);
2016 INIT_LIST_HEAD(&local->sta_bss_list);
2020 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2022 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2023 struct ieee80211_sta_bss *bss, *tmp;
2025 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2026 ieee80211_rx_bss_put(dev, bss);
2030 static int ieee80211_sta_join_ibss(struct net_device *dev,
2031 struct ieee80211_if_sta *ifsta,
2032 struct ieee80211_sta_bss *bss)
2034 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2035 int res, rates, i, j;
2036 struct sk_buff *skb;
2037 struct ieee80211_mgmt *mgmt;
2038 struct ieee80211_tx_control control;
2039 struct rate_selection ratesel;
2041 struct ieee80211_sub_if_data *sdata;
2042 struct ieee80211_supported_band *sband;
2044 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2046 /* Remove possible STA entries from other IBSS networks. */
2047 sta_info_flush(local, NULL);
2049 if (local->ops->reset_tsf) {
2050 /* Reset own TSF to allow time synchronization work. */
2051 local->ops->reset_tsf(local_to_hw(local));
2053 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2054 res = ieee80211_if_config(dev);
2058 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2060 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2061 sdata->drop_unencrypted = bss->capability &
2062 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2064 res = ieee80211_set_freq(local, bss->freq);
2066 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2067 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2068 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2072 /* Set beacon template */
2073 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2078 skb_reserve(skb, local->hw.extra_tx_headroom);
2080 mgmt = (struct ieee80211_mgmt *)
2081 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2082 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2083 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2084 IEEE80211_STYPE_BEACON);
2085 memset(mgmt->da, 0xff, ETH_ALEN);
2086 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2087 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2088 mgmt->u.beacon.beacon_int =
2089 cpu_to_le16(local->hw.conf.beacon_int);
2090 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2092 pos = skb_put(skb, 2 + ifsta->ssid_len);
2093 *pos++ = WLAN_EID_SSID;
2094 *pos++ = ifsta->ssid_len;
2095 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2097 rates = bss->supp_rates_len;
2100 pos = skb_put(skb, 2 + rates);
2101 *pos++ = WLAN_EID_SUPP_RATES;
2103 memcpy(pos, bss->supp_rates, rates);
2105 if (bss->band == IEEE80211_BAND_2GHZ) {
2106 pos = skb_put(skb, 2 + 1);
2107 *pos++ = WLAN_EID_DS_PARAMS;
2109 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2112 pos = skb_put(skb, 2 + 2);
2113 *pos++ = WLAN_EID_IBSS_PARAMS;
2115 /* FIX: set ATIM window based on scan results */
2119 if (bss->supp_rates_len > 8) {
2120 rates = bss->supp_rates_len - 8;
2121 pos = skb_put(skb, 2 + rates);
2122 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2124 memcpy(pos, &bss->supp_rates[8], rates);
2127 memset(&control, 0, sizeof(control));
2128 rate_control_get_rate(dev, sband, skb, &ratesel);
2129 if (!ratesel.rate) {
2130 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2131 "for IBSS beacon\n", dev->name);
2134 control.vif = &sdata->vif;
2135 control.tx_rate = ratesel.rate;
2136 if (sdata->bss_conf.use_short_preamble &&
2137 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2138 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2139 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2140 control.flags |= IEEE80211_TXCTL_NO_ACK;
2141 control.retry_limit = 1;
2143 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2144 if (ifsta->probe_resp) {
2145 mgmt = (struct ieee80211_mgmt *)
2146 ifsta->probe_resp->data;
2147 mgmt->frame_control =
2148 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2149 IEEE80211_STYPE_PROBE_RESP);
2151 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2152 "template for IBSS\n", dev->name);
2155 if (local->ops->beacon_update &&
2156 local->ops->beacon_update(local_to_hw(local),
2157 skb, &control) == 0) {
2158 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2159 "template\n", dev->name);
2164 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2165 for (i = 0; i < bss->supp_rates_len; i++) {
2166 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2167 for (j = 0; j < sband->n_bitrates; j++)
2168 if (sband->bitrates[j].bitrate == bitrate)
2171 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2175 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2176 "template\n", dev->name);
2180 ifsta->state = IEEE80211_IBSS_JOINED;
2181 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2183 ieee80211_rx_bss_put(dev, bss);
2189 static void ieee80211_rx_bss_info(struct net_device *dev,
2190 struct ieee80211_mgmt *mgmt,
2192 struct ieee80211_rx_status *rx_status,
2195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2196 struct ieee802_11_elems elems;
2199 struct ieee80211_sta_bss *bss;
2200 struct sta_info *sta;
2201 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2202 u64 beacon_timestamp, rx_timestamp;
2203 DECLARE_MAC_BUF(mac);
2204 DECLARE_MAC_BUF(mac2);
2206 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2207 return; /* ignore ProbeResp to foreign address */
2210 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2211 dev->name, beacon ? "Beacon" : "Probe Response",
2212 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2215 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2219 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2220 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2222 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2223 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2224 (sta = sta_info_get(local, mgmt->sa))) {
2225 struct ieee80211_supported_band *sband;
2226 struct ieee80211_rate *bitrates;
2228 u64 supp_rates, prev_rates;
2231 sband = local->hw.wiphy->bands[rx_status->band];
2235 sband = local->hw.wiphy->bands[
2236 local->hw.conf.channel->band];
2239 bitrates = sband->bitrates;
2240 num_rates = sband->n_bitrates;
2243 for (i = 0; i < elems.supp_rates_len +
2244 elems.ext_supp_rates_len; i++) {
2247 if (i < elems.supp_rates_len)
2248 rate = elems.supp_rates[i];
2249 else if (elems.ext_supp_rates)
2250 rate = elems.ext_supp_rates
2251 [i - elems.supp_rates_len];
2252 own_rate = 5 * (rate & 0x7f);
2253 for (j = 0; j < num_rates; j++)
2254 if (bitrates[j].bitrate == own_rate)
2255 supp_rates |= BIT(j);
2258 prev_rates = sta->supp_rates[rx_status->band];
2259 sta->supp_rates[rx_status->band] &= supp_rates;
2260 if (sta->supp_rates[rx_status->band] == 0) {
2261 /* No matching rates - this should not really happen.
2262 * Make sure that at least one rate is marked
2263 * supported to avoid issues with TX rate ctrl. */
2264 sta->supp_rates[rx_status->band] =
2265 sdata->u.sta.supp_rates_bits[rx_status->band];
2267 if (sta->supp_rates[rx_status->band] != prev_rates) {
2268 printk(KERN_DEBUG "%s: updated supp_rates set for "
2269 "%s based on beacon info (0x%llx & 0x%llx -> "
2271 dev->name, print_mac(mac, sta->addr),
2272 (unsigned long long) prev_rates,
2273 (unsigned long long) supp_rates,
2274 (unsigned long long) sta->supp_rates[rx_status->band]);
2282 if (elems.ds_params && elems.ds_params_len == 1)
2283 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2285 freq = rx_status->freq;
2287 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2288 elems.ssid, elems.ssid_len);
2290 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2291 elems.ssid, elems.ssid_len);
2296 /* TODO: order by RSSI? */
2297 spin_lock_bh(&local->sta_bss_lock);
2298 list_move_tail(&bss->list, &local->sta_bss_list);
2299 spin_unlock_bh(&local->sta_bss_lock);
2303 bss->band = rx_status->band;
2305 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2306 bss->probe_resp && beacon) {
2308 * Do not allow beacon to override data from Probe Response. */
2309 ieee80211_rx_bss_put(dev, bss);
2313 /* save the ERP value so that it is available at association time */
2314 if (elems.erp_info && elems.erp_info_len >= 1) {
2315 bss->erp_value = elems.erp_info[0];
2316 bss->has_erp_value = 1;
2319 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2320 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2322 bss->supp_rates_len = 0;
2323 if (elems.supp_rates) {
2324 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2325 if (clen > elems.supp_rates_len)
2326 clen = elems.supp_rates_len;
2327 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2329 bss->supp_rates_len += clen;
2331 if (elems.ext_supp_rates) {
2332 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2333 if (clen > elems.ext_supp_rates_len)
2334 clen = elems.ext_supp_rates_len;
2335 memcpy(&bss->supp_rates[bss->supp_rates_len],
2336 elems.ext_supp_rates, clen);
2337 bss->supp_rates_len += clen;
2341 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2342 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2344 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2346 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2347 bss->wpa_ie_len = elems.wpa_len + 2;
2349 bss->wpa_ie_len = 0;
2350 } else if (!elems.wpa && bss->wpa_ie) {
2353 bss->wpa_ie_len = 0;
2357 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2358 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2360 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2362 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2363 bss->rsn_ie_len = elems.rsn_len + 2;
2365 bss->rsn_ie_len = 0;
2366 } else if (!elems.rsn && bss->rsn_ie) {
2369 bss->rsn_ie_len = 0;
2372 if (elems.wmm_param &&
2373 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2374 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2376 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2378 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2379 elems.wmm_param_len + 2);
2380 bss->wmm_ie_len = elems.wmm_param_len + 2;
2382 bss->wmm_ie_len = 0;
2383 } else if (!elems.wmm_param && bss->wmm_ie) {
2386 bss->wmm_ie_len = 0;
2388 if (elems.ht_cap_elem &&
2389 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2390 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2392 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2394 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2395 elems.ht_cap_elem_len + 2);
2396 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2399 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2405 bss->timestamp = beacon_timestamp;
2406 bss->last_update = jiffies;
2407 bss->rssi = rx_status->ssi;
2408 bss->signal = rx_status->signal;
2409 bss->noise = rx_status->noise;
2413 /* check if we need to merge IBSS */
2414 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2415 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2416 mgmt->u.beacon.capab_info & WLAN_CAPABILITY_IBSS &&
2417 bss->freq == local->oper_channel->center_freq &&
2418 elems.ssid_len == sdata->u.sta.ssid_len &&
2419 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2420 if (rx_status->flag & RX_FLAG_TSFT) {
2421 /* in order for correct IBSS merging we need mactime
2423 * since mactime is defined as the time the first data
2424 * symbol of the frame hits the PHY, and the timestamp
2425 * of the beacon is defined as "the time that the data
2426 * symbol containing the first bit of the timestamp is
2427 * transmitted to the PHY plus the transmitting STA’s
2428 * delays through its local PHY from the MAC-PHY
2429 * interface to its interface with the WM"
2430 * (802.11 11.1.2) - equals the time this bit arrives at
2431 * the receiver - we have to take into account the
2432 * offset between the two.
2433 * e.g: at 1 MBit that means mactime is 192 usec earlier
2434 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2436 int rate = local->hw.wiphy->bands[rx_status->band]->
2437 bitrates[rx_status->rate_idx].bitrate;
2438 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2439 } else if (local && local->ops && local->ops->get_tsf)
2440 /* second best option: get current TSF */
2441 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2443 /* can't merge without knowing the TSF */
2444 rx_timestamp = -1LLU;
2445 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2446 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2447 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2448 print_mac(mac, mgmt->sa),
2449 print_mac(mac2, mgmt->bssid),
2450 (unsigned long long)rx_timestamp,
2451 (unsigned long long)beacon_timestamp,
2452 (unsigned long long)(rx_timestamp - beacon_timestamp),
2454 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2455 if (beacon_timestamp > rx_timestamp) {
2456 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2457 if (net_ratelimit())
2458 printk(KERN_DEBUG "%s: beacon TSF higher than "
2459 "local TSF - IBSS merge with BSSID %s\n",
2460 dev->name, print_mac(mac, mgmt->bssid));
2461 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2462 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2463 ieee80211_ibss_add_sta(dev, NULL,
2464 mgmt->bssid, mgmt->sa);
2468 ieee80211_rx_bss_put(dev, bss);
2472 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2473 struct ieee80211_mgmt *mgmt,
2475 struct ieee80211_rx_status *rx_status)
2477 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2481 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2482 struct ieee80211_mgmt *mgmt,
2484 struct ieee80211_rx_status *rx_status)
2486 struct ieee80211_sub_if_data *sdata;
2487 struct ieee80211_if_sta *ifsta;
2489 struct ieee802_11_elems elems;
2490 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2491 struct ieee80211_conf *conf = &local->hw.conf;
2494 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2496 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2497 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2499 ifsta = &sdata->u.sta;
2501 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2502 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2505 /* Process beacon from the current BSS */
2506 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2510 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2512 if (elems.erp_info && elems.erp_info_len >= 1)
2513 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2515 if (elems.ht_cap_elem && elems.ht_info_elem &&
2516 elems.wmm_param && local->ops->conf_ht &&
2517 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2518 struct ieee80211_ht_bss_info bss_info;
2520 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2521 (struct ieee80211_ht_addt_info *)
2522 elems.ht_info_elem, &bss_info);
2523 /* check if AP changed bss inforamation */
2524 if ((conf->ht_bss_conf.primary_channel !=
2525 bss_info.primary_channel) ||
2526 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2527 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2528 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2532 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2533 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2534 elems.wmm_param_len);
2537 ieee80211_bss_info_change_notify(sdata, changed);
2541 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2542 struct ieee80211_if_sta *ifsta,
2543 struct ieee80211_mgmt *mgmt,
2545 struct ieee80211_rx_status *rx_status)
2547 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2548 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2550 struct sk_buff *skb;
2551 struct ieee80211_mgmt *resp;
2553 DECLARE_MAC_BUF(mac);
2554 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2555 DECLARE_MAC_BUF(mac2);
2556 DECLARE_MAC_BUF(mac3);
2559 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2560 ifsta->state != IEEE80211_IBSS_JOINED ||
2561 len < 24 + 2 || !ifsta->probe_resp)
2564 if (local->ops->tx_last_beacon)
2565 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2569 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2570 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2571 "%s (tx_last_beacon=%d)\n",
2572 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2573 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2574 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2576 if (!tx_last_beacon)
2579 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2580 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2583 end = ((u8 *) mgmt) + len;
2584 pos = mgmt->u.probe_req.variable;
2585 if (pos[0] != WLAN_EID_SSID ||
2586 pos + 2 + pos[1] > end) {
2587 if (net_ratelimit()) {
2588 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2590 dev->name, print_mac(mac, mgmt->sa));
2595 (pos[1] != ifsta->ssid_len ||
2596 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2597 /* Ignore ProbeReq for foreign SSID */
2601 /* Reply with ProbeResp */
2602 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2606 resp = (struct ieee80211_mgmt *) skb->data;
2607 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2608 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2609 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2610 dev->name, print_mac(mac, resp->da));
2611 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2612 ieee80211_sta_tx(dev, skb, 0);
2615 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2616 struct ieee80211_if_sta *ifsta,
2617 struct ieee80211_mgmt *mgmt,
2620 if (len < IEEE80211_MIN_ACTION_SIZE)
2623 switch (mgmt->u.action.category) {
2624 case WLAN_CATEGORY_BACK:
2625 switch (mgmt->u.action.u.addba_req.action_code) {
2626 case WLAN_ACTION_ADDBA_REQ:
2627 if (len < (IEEE80211_MIN_ACTION_SIZE +
2628 sizeof(mgmt->u.action.u.addba_req)))
2630 ieee80211_sta_process_addba_request(dev, mgmt, len);
2632 case WLAN_ACTION_ADDBA_RESP:
2633 if (len < (IEEE80211_MIN_ACTION_SIZE +
2634 sizeof(mgmt->u.action.u.addba_resp)))
2636 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2638 case WLAN_ACTION_DELBA:
2639 if (len < (IEEE80211_MIN_ACTION_SIZE +
2640 sizeof(mgmt->u.action.u.delba)))
2642 ieee80211_sta_process_delba(dev, mgmt, len);
2645 if (net_ratelimit())
2646 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2656 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2657 struct ieee80211_rx_status *rx_status)
2659 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2660 struct ieee80211_sub_if_data *sdata;
2661 struct ieee80211_if_sta *ifsta;
2662 struct ieee80211_mgmt *mgmt;
2668 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2669 ifsta = &sdata->u.sta;
2671 mgmt = (struct ieee80211_mgmt *) skb->data;
2672 fc = le16_to_cpu(mgmt->frame_control);
2674 switch (fc & IEEE80211_FCTL_STYPE) {
2675 case IEEE80211_STYPE_PROBE_REQ:
2676 case IEEE80211_STYPE_PROBE_RESP:
2677 case IEEE80211_STYPE_BEACON:
2678 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2679 case IEEE80211_STYPE_AUTH:
2680 case IEEE80211_STYPE_ASSOC_RESP:
2681 case IEEE80211_STYPE_REASSOC_RESP:
2682 case IEEE80211_STYPE_DEAUTH:
2683 case IEEE80211_STYPE_DISASSOC:
2684 case IEEE80211_STYPE_ACTION:
2685 skb_queue_tail(&ifsta->skb_queue, skb);
2686 queue_work(local->hw.workqueue, &ifsta->work);
2689 printk(KERN_DEBUG "%s: received unknown management frame - "
2690 "stype=%d\n", dev->name,
2691 (fc & IEEE80211_FCTL_STYPE) >> 4);
2700 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2701 struct sk_buff *skb)
2703 struct ieee80211_rx_status *rx_status;
2704 struct ieee80211_sub_if_data *sdata;
2705 struct ieee80211_if_sta *ifsta;
2706 struct ieee80211_mgmt *mgmt;
2709 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2710 ifsta = &sdata->u.sta;
2712 rx_status = (struct ieee80211_rx_status *) skb->cb;
2713 mgmt = (struct ieee80211_mgmt *) skb->data;
2714 fc = le16_to_cpu(mgmt->frame_control);
2716 switch (fc & IEEE80211_FCTL_STYPE) {
2717 case IEEE80211_STYPE_PROBE_REQ:
2718 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2721 case IEEE80211_STYPE_PROBE_RESP:
2722 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2724 case IEEE80211_STYPE_BEACON:
2725 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2727 case IEEE80211_STYPE_AUTH:
2728 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2730 case IEEE80211_STYPE_ASSOC_RESP:
2731 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2733 case IEEE80211_STYPE_REASSOC_RESP:
2734 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2736 case IEEE80211_STYPE_DEAUTH:
2737 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2739 case IEEE80211_STYPE_DISASSOC:
2740 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2742 case IEEE80211_STYPE_ACTION:
2743 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2752 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2753 struct ieee80211_rx_status *rx_status)
2755 struct ieee80211_mgmt *mgmt;
2759 return RX_DROP_UNUSABLE;
2761 mgmt = (struct ieee80211_mgmt *) skb->data;
2762 fc = le16_to_cpu(mgmt->frame_control);
2764 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2768 return RX_DROP_MONITOR;
2770 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2771 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2772 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2773 skb->len, rx_status);
2776 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2777 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2787 static int ieee80211_sta_active_ibss(struct net_device *dev)
2789 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2791 struct sta_info *sta;
2793 read_lock_bh(&local->sta_lock);
2794 list_for_each_entry(sta, &local->sta_list, list) {
2795 if (sta->dev == dev &&
2796 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2802 read_unlock_bh(&local->sta_lock);
2808 static void ieee80211_sta_expire(struct net_device *dev)
2810 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2811 struct sta_info *sta, *tmp;
2812 LIST_HEAD(tmp_list);
2813 DECLARE_MAC_BUF(mac);
2815 write_lock_bh(&local->sta_lock);
2816 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2817 if (time_after(jiffies, sta->last_rx +
2818 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2819 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2820 dev->name, print_mac(mac, sta->addr));
2821 __sta_info_get(sta);
2822 sta_info_remove(sta);
2823 list_add(&sta->list, &tmp_list);
2825 write_unlock_bh(&local->sta_lock);
2827 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2834 static void ieee80211_sta_merge_ibss(struct net_device *dev,
2835 struct ieee80211_if_sta *ifsta)
2837 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2839 ieee80211_sta_expire(dev);
2840 if (ieee80211_sta_active_ibss(dev))
2843 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2844 "IBSS networks with same SSID (merge)\n", dev->name);
2845 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2849 void ieee80211_sta_timer(unsigned long data)
2851 struct ieee80211_sub_if_data *sdata =
2852 (struct ieee80211_sub_if_data *) data;
2853 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2854 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2856 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2857 queue_work(local->hw.workqueue, &ifsta->work);
2861 void ieee80211_sta_work(struct work_struct *work)
2863 struct ieee80211_sub_if_data *sdata =
2864 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2865 struct net_device *dev = sdata->dev;
2866 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2867 struct ieee80211_if_sta *ifsta;
2868 struct sk_buff *skb;
2870 if (!netif_running(dev))
2873 if (local->sta_sw_scanning || local->sta_hw_scanning)
2876 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2877 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
2878 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2879 "(type=%d)\n", dev->name, sdata->vif.type);
2882 ifsta = &sdata->u.sta;
2884 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2885 ieee80211_sta_rx_queued_mgmt(dev, skb);
2887 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2888 ifsta->state != IEEE80211_ASSOCIATE &&
2889 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
2890 if (ifsta->scan_ssid_len)
2891 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2893 ieee80211_sta_start_scan(dev, NULL, 0);
2897 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2898 if (ieee80211_sta_config_auth(dev, ifsta))
2900 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2901 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2904 switch (ifsta->state) {
2905 case IEEE80211_DISABLED:
2907 case IEEE80211_AUTHENTICATE:
2908 ieee80211_authenticate(dev, ifsta);
2910 case IEEE80211_ASSOCIATE:
2911 ieee80211_associate(dev, ifsta);
2913 case IEEE80211_ASSOCIATED:
2914 ieee80211_associated(dev, ifsta);
2916 case IEEE80211_IBSS_SEARCH:
2917 ieee80211_sta_find_ibss(dev, ifsta);
2919 case IEEE80211_IBSS_JOINED:
2920 ieee80211_sta_merge_ibss(dev, ifsta);
2923 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2928 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2929 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2930 "mixed-cell disabled - disassociate\n", dev->name);
2932 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2933 ieee80211_set_disassoc(dev, ifsta, 0);
2938 static void ieee80211_sta_reset_auth(struct net_device *dev,
2939 struct ieee80211_if_sta *ifsta)
2941 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2943 if (local->ops->reset_tsf) {
2944 /* Reset own TSF to allow time synchronization work. */
2945 local->ops->reset_tsf(local_to_hw(local));
2948 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2951 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2952 ifsta->auth_alg = WLAN_AUTH_OPEN;
2953 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2954 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2955 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2956 ifsta->auth_alg = WLAN_AUTH_LEAP;
2958 ifsta->auth_alg = WLAN_AUTH_OPEN;
2959 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2961 ifsta->auth_transaction = -1;
2962 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2963 ifsta->auth_tries = ifsta->assoc_tries = 0;
2964 netif_carrier_off(dev);
2968 void ieee80211_sta_req_auth(struct net_device *dev,
2969 struct ieee80211_if_sta *ifsta)
2971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2972 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2974 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2977 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2978 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2979 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2980 IEEE80211_STA_AUTO_SSID_SEL))) {
2981 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2982 queue_work(local->hw.workqueue, &ifsta->work);
2986 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2987 const char *ssid, int ssid_len)
2989 int tmp, hidden_ssid;
2991 if (ssid_len == ifsta->ssid_len &&
2992 !memcmp(ifsta->ssid, ssid, ssid_len))
2995 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3001 if (ssid[tmp] != '\0') {
3007 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3010 if (ssid_len == 1 && ssid[0] == ' ')
3016 static int ieee80211_sta_config_auth(struct net_device *dev,
3017 struct ieee80211_if_sta *ifsta)
3019 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3020 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3021 struct ieee80211_sta_bss *bss, *selected = NULL;
3022 int top_rssi = 0, freq;
3024 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3025 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3026 ifsta->state = IEEE80211_AUTHENTICATE;
3027 ieee80211_sta_reset_auth(dev, ifsta);
3031 spin_lock_bh(&local->sta_bss_lock);
3032 freq = local->oper_channel->center_freq;
3033 list_for_each_entry(bss, &local->sta_bss_list, list) {
3034 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3037 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3038 !!sdata->default_key)
3041 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3045 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3046 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3049 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3050 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3053 if (!selected || top_rssi < bss->rssi) {
3055 top_rssi = bss->rssi;
3059 atomic_inc(&selected->users);
3060 spin_unlock_bh(&local->sta_bss_lock);
3063 ieee80211_set_freq(local, selected->freq);
3064 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3065 ieee80211_sta_set_ssid(dev, selected->ssid,
3066 selected->ssid_len);
3067 ieee80211_sta_set_bssid(dev, selected->bssid);
3068 ieee80211_rx_bss_put(dev, selected);
3069 ifsta->state = IEEE80211_AUTHENTICATE;
3070 ieee80211_sta_reset_auth(dev, ifsta);
3073 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3074 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3075 ieee80211_sta_start_scan(dev, NULL, 0);
3077 ieee80211_sta_start_scan(dev, ifsta->ssid,
3079 ifsta->state = IEEE80211_AUTHENTICATE;
3080 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3082 ifsta->state = IEEE80211_DISABLED;
3088 static int ieee80211_sta_create_ibss(struct net_device *dev,
3089 struct ieee80211_if_sta *ifsta)
3091 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3092 struct ieee80211_sta_bss *bss;
3093 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3094 struct ieee80211_supported_band *sband;
3095 u8 bssid[ETH_ALEN], *pos;
3097 DECLARE_MAC_BUF(mac);
3100 /* Easier testing, use fixed BSSID. */
3101 memset(bssid, 0xfe, ETH_ALEN);
3103 /* Generate random, not broadcast, locally administered BSSID. Mix in
3104 * own MAC address to make sure that devices that do not have proper
3105 * random number generator get different BSSID. */
3106 get_random_bytes(bssid, ETH_ALEN);
3107 for (i = 0; i < ETH_ALEN; i++)
3108 bssid[i] ^= dev->dev_addr[i];
3113 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3114 dev->name, print_mac(mac, bssid));
3116 bss = ieee80211_rx_bss_add(dev, bssid,
3117 local->hw.conf.channel->center_freq,
3118 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3122 bss->band = local->hw.conf.channel->band;
3123 sband = local->hw.wiphy->bands[bss->band];
3125 if (local->hw.conf.beacon_int == 0)
3126 local->hw.conf.beacon_int = 100;
3127 bss->beacon_int = local->hw.conf.beacon_int;
3128 bss->last_update = jiffies;
3129 bss->capability = WLAN_CAPABILITY_IBSS;
3130 if (sdata->default_key) {
3131 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3133 sdata->drop_unencrypted = 0;
3134 bss->supp_rates_len = sband->n_bitrates;
3135 pos = bss->supp_rates;
3136 for (i = 0; i < sband->n_bitrates; i++) {
3137 int rate = sband->bitrates[i].bitrate;
3138 *pos++ = (u8) (rate / 5);
3141 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3145 static int ieee80211_sta_find_ibss(struct net_device *dev,
3146 struct ieee80211_if_sta *ifsta)
3148 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3149 struct ieee80211_sta_bss *bss;
3153 DECLARE_MAC_BUF(mac);
3154 DECLARE_MAC_BUF(mac2);
3156 if (ifsta->ssid_len == 0)
3159 active_ibss = ieee80211_sta_active_ibss(dev);
3160 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3161 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3162 dev->name, active_ibss);
3163 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3164 spin_lock_bh(&local->sta_bss_lock);
3165 list_for_each_entry(bss, &local->sta_bss_list, list) {
3166 if (ifsta->ssid_len != bss->ssid_len ||
3167 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3168 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3170 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3171 printk(KERN_DEBUG " bssid=%s found\n",
3172 print_mac(mac, bss->bssid));
3173 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3174 memcpy(bssid, bss->bssid, ETH_ALEN);
3176 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3179 spin_unlock_bh(&local->sta_bss_lock);
3181 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3182 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3183 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3184 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3185 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3186 (bss = ieee80211_rx_bss_get(dev, bssid,
3187 local->hw.conf.channel->center_freq,
3188 ifsta->ssid, ifsta->ssid_len))) {
3189 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3190 " based on configured SSID\n",
3191 dev->name, print_mac(mac, bssid));
3192 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3194 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3195 printk(KERN_DEBUG " did not try to join ibss\n");
3196 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3198 /* Selected IBSS not found in current scan results - try to scan */
3199 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3200 !ieee80211_sta_active_ibss(dev)) {
3201 mod_timer(&ifsta->timer, jiffies +
3202 IEEE80211_IBSS_MERGE_INTERVAL);
3203 } else if (time_after(jiffies, local->last_scan_completed +
3204 IEEE80211_SCAN_INTERVAL)) {
3205 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3206 "join\n", dev->name);
3207 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3209 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3210 int interval = IEEE80211_SCAN_INTERVAL;
3212 if (time_after(jiffies, ifsta->ibss_join_req +
3213 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3214 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3215 (!(local->oper_channel->flags &
3216 IEEE80211_CHAN_NO_IBSS)))
3217 return ieee80211_sta_create_ibss(dev, ifsta);
3218 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3219 printk(KERN_DEBUG "%s: IBSS not allowed on"
3220 " %d MHz\n", dev->name,
3221 local->hw.conf.channel->center_freq);
3224 /* No IBSS found - decrease scan interval and continue
3226 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3229 ifsta->state = IEEE80211_IBSS_SEARCH;
3230 mod_timer(&ifsta->timer, jiffies + interval);
3238 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3240 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3241 struct ieee80211_if_sta *ifsta;
3242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3244 if (len > IEEE80211_MAX_SSID_LEN)
3247 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3249 if (local->ops->conf_tx) {
3250 struct ieee80211_tx_queue_params qparam;
3253 memset(&qparam, 0, sizeof(qparam));
3257 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3258 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3263 qparam.cw_max = 1023;
3266 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3267 local->ops->conf_tx(local_to_hw(local),
3268 i + IEEE80211_TX_QUEUE_DATA0,
3271 /* IBSS uses different parameters for Beacon sending */
3275 local->ops->conf_tx(local_to_hw(local),
3276 IEEE80211_TX_QUEUE_BEACON, &qparam);
3279 ifsta = &sdata->u.sta;
3281 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3282 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3283 memcpy(ifsta->ssid, ssid, len);
3284 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3285 ifsta->ssid_len = len;
3288 ifsta->flags |= IEEE80211_STA_SSID_SET;
3290 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3291 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3292 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3293 ifsta->ibss_join_req = jiffies;
3294 ifsta->state = IEEE80211_IBSS_SEARCH;
3295 return ieee80211_sta_find_ibss(dev, ifsta);
3301 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3303 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3304 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3305 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3306 *len = ifsta->ssid_len;
3311 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3313 struct ieee80211_sub_if_data *sdata;
3314 struct ieee80211_if_sta *ifsta;
3317 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3318 ifsta = &sdata->u.sta;
3320 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3321 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3322 res = ieee80211_if_config(dev);
3324 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3325 "the low-level driver\n", dev->name);
3330 if (is_valid_ether_addr(bssid))
3331 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3333 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3339 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3340 struct ieee80211_sub_if_data *sdata,
3343 struct sk_buff *skb;
3344 struct ieee80211_hdr *nullfunc;
3347 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3349 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3350 "frame\n", sdata->dev->name);
3353 skb_reserve(skb, local->hw.extra_tx_headroom);
3355 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3356 memset(nullfunc, 0, 24);
3357 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3358 IEEE80211_FCTL_TODS;
3360 fc |= IEEE80211_FCTL_PM;
3361 nullfunc->frame_control = cpu_to_le16(fc);
3362 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3363 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3364 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3366 ieee80211_sta_tx(sdata->dev, skb, 0);
3370 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3372 struct ieee80211_local *local = hw_to_local(hw);
3373 struct net_device *dev = local->scan_dev;
3374 struct ieee80211_sub_if_data *sdata;
3375 union iwreq_data wrqu;
3377 local->last_scan_completed = jiffies;
3378 memset(&wrqu, 0, sizeof(wrqu));
3379 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3381 if (local->sta_hw_scanning) {
3382 local->sta_hw_scanning = 0;
3386 local->sta_sw_scanning = 0;
3387 if (ieee80211_hw_config(local))
3388 printk(KERN_DEBUG "%s: failed to restore operational "
3389 "channel after scan\n", dev->name);
3392 netif_tx_lock_bh(local->mdev);
3393 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3394 local->ops->configure_filter(local_to_hw(local),
3395 FIF_BCN_PRBRESP_PROMISC,
3396 &local->filter_flags,
3397 local->mdev->mc_count,
3398 local->mdev->mc_list);
3400 netif_tx_unlock_bh(local->mdev);
3403 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3405 /* No need to wake the master device. */
3406 if (sdata->dev == local->mdev)
3409 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
3410 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3411 ieee80211_send_nullfunc(local, sdata, 0);
3412 ieee80211_sta_timer((unsigned long)sdata);
3415 netif_wake_queue(sdata->dev);
3420 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3421 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3422 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3423 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3424 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3425 !ieee80211_sta_active_ibss(dev)))
3426 ieee80211_sta_find_ibss(dev, ifsta);
3429 EXPORT_SYMBOL(ieee80211_scan_completed);
3431 void ieee80211_sta_scan_work(struct work_struct *work)
3433 struct ieee80211_local *local =
3434 container_of(work, struct ieee80211_local, scan_work.work);
3435 struct net_device *dev = local->scan_dev;
3436 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3437 struct ieee80211_supported_band *sband;
3438 struct ieee80211_channel *chan;
3440 unsigned long next_delay = 0;
3442 if (!local->sta_sw_scanning)
3445 switch (local->scan_state) {
3446 case SCAN_SET_CHANNEL:
3448 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3449 * after we successfully scanned the last channel of the last
3450 * band (and the last band is supported by the hw)
3452 if (local->scan_band < IEEE80211_NUM_BANDS)
3453 sband = local->hw.wiphy->bands[local->scan_band];
3458 * If we are at an unsupported band and have more bands
3459 * left to scan, advance to the next supported one.
3461 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3463 sband = local->hw.wiphy->bands[local->scan_band];
3464 local->scan_channel_idx = 0;
3467 /* if no more bands/channels left, complete scan */
3468 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3469 ieee80211_scan_completed(local_to_hw(local));
3473 chan = &sband->channels[local->scan_channel_idx];
3475 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3476 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3477 chan->flags & IEEE80211_CHAN_NO_IBSS))
3481 local->scan_channel = chan;
3482 if (ieee80211_hw_config(local)) {
3483 printk(KERN_DEBUG "%s: failed to set freq to "
3484 "%d MHz for scan\n", dev->name,
3490 /* advance state machine to next channel/band */
3491 local->scan_channel_idx++;
3492 if (local->scan_channel_idx >= sband->n_channels) {
3494 * scan_band may end up == IEEE80211_NUM_BANDS, but
3495 * we'll catch that case above and complete the scan
3496 * if that is the case.
3499 local->scan_channel_idx = 0;
3505 next_delay = IEEE80211_PROBE_DELAY +
3506 usecs_to_jiffies(local->hw.channel_change_time);
3507 local->scan_state = SCAN_SEND_PROBE;
3509 case SCAN_SEND_PROBE:
3510 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3511 local->scan_state = SCAN_SET_CHANNEL;
3513 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3515 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3516 local->scan_ssid_len);
3517 next_delay = IEEE80211_CHANNEL_TIME;
3521 if (local->sta_sw_scanning)
3522 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3527 static int ieee80211_sta_start_scan(struct net_device *dev,
3528 u8 *ssid, size_t ssid_len)
3530 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3531 struct ieee80211_sub_if_data *sdata;
3533 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3536 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3537 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3540 * ScanType: ACTIVE, PASSIVE
3541 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3542 * a Probe frame during active scanning
3544 * MinChannelTime (>= ProbeDelay), in TU
3545 * MaxChannelTime: (>= MinChannelTime), in TU
3548 /* MLME-SCAN.confirm
3550 * ResultCode: SUCCESS, INVALID_PARAMETERS
3553 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3554 if (local->scan_dev == dev)
3559 if (local->ops->hw_scan) {
3560 int rc = local->ops->hw_scan(local_to_hw(local),
3563 local->sta_hw_scanning = 1;
3564 local->scan_dev = dev;
3569 local->sta_sw_scanning = 1;
3572 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3574 /* Don't stop the master interface, otherwise we can't transmit
3576 if (sdata->dev == local->mdev)
3579 netif_stop_queue(sdata->dev);
3580 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3581 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3582 ieee80211_send_nullfunc(local, sdata, 1);
3587 local->scan_ssid_len = ssid_len;
3588 memcpy(local->scan_ssid, ssid, ssid_len);
3590 local->scan_ssid_len = 0;
3591 local->scan_state = SCAN_SET_CHANNEL;
3592 local->scan_channel_idx = 0;
3593 local->scan_band = IEEE80211_BAND_2GHZ;
3594 local->scan_dev = dev;
3596 netif_tx_lock_bh(local->mdev);
3597 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3598 local->ops->configure_filter(local_to_hw(local),
3599 FIF_BCN_PRBRESP_PROMISC,
3600 &local->filter_flags,
3601 local->mdev->mc_count,
3602 local->mdev->mc_list);
3603 netif_tx_unlock_bh(local->mdev);
3605 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3606 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3607 IEEE80211_CHANNEL_TIME);
3613 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3615 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3616 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3617 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3619 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3620 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3622 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3623 if (local->scan_dev == dev)
3628 ifsta->scan_ssid_len = ssid_len;
3630 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3631 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3632 queue_work(local->hw.workqueue, &ifsta->work);
3637 ieee80211_sta_scan_result(struct net_device *dev,
3638 struct ieee80211_sta_bss *bss,
3639 char *current_ev, char *end_buf)
3641 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3642 struct iw_event iwe;
3644 if (time_after(jiffies,
3645 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3648 memset(&iwe, 0, sizeof(iwe));
3649 iwe.cmd = SIOCGIWAP;
3650 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3651 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3652 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3655 memset(&iwe, 0, sizeof(iwe));
3656 iwe.cmd = SIOCGIWESSID;
3657 iwe.u.data.length = bss->ssid_len;
3658 iwe.u.data.flags = 1;
3659 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3662 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3663 memset(&iwe, 0, sizeof(iwe));
3664 iwe.cmd = SIOCGIWMODE;
3665 if (bss->capability & WLAN_CAPABILITY_ESS)
3666 iwe.u.mode = IW_MODE_MASTER;
3668 iwe.u.mode = IW_MODE_ADHOC;
3669 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3673 memset(&iwe, 0, sizeof(iwe));
3674 iwe.cmd = SIOCGIWFREQ;
3675 iwe.u.freq.m = bss->freq;
3677 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3680 memset(&iwe, 0, sizeof(iwe));
3681 iwe.cmd = SIOCGIWFREQ;
3682 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3684 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3687 memset(&iwe, 0, sizeof(iwe));
3689 iwe.u.qual.qual = bss->signal;
3690 iwe.u.qual.level = bss->rssi;
3691 iwe.u.qual.noise = bss->noise;
3692 iwe.u.qual.updated = local->wstats_flags;
3693 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3696 memset(&iwe, 0, sizeof(iwe));
3697 iwe.cmd = SIOCGIWENCODE;
3698 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3699 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3701 iwe.u.data.flags = IW_ENCODE_DISABLED;
3702 iwe.u.data.length = 0;
3703 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3705 if (bss && bss->wpa_ie) {
3706 memset(&iwe, 0, sizeof(iwe));
3707 iwe.cmd = IWEVGENIE;
3708 iwe.u.data.length = bss->wpa_ie_len;
3709 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3713 if (bss && bss->rsn_ie) {
3714 memset(&iwe, 0, sizeof(iwe));
3715 iwe.cmd = IWEVGENIE;
3716 iwe.u.data.length = bss->rsn_ie_len;
3717 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3721 if (bss && bss->supp_rates_len > 0) {
3722 /* display all supported rates in readable format */
3723 char *p = current_ev + IW_EV_LCP_LEN;
3726 memset(&iwe, 0, sizeof(iwe));
3727 iwe.cmd = SIOCGIWRATE;
3728 /* Those two flags are ignored... */
3729 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3731 for (i = 0; i < bss->supp_rates_len; i++) {
3732 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3734 p = iwe_stream_add_value(current_ev, p,
3735 end_buf, &iwe, IW_EV_PARAM_LEN);
3742 buf = kmalloc(30, GFP_ATOMIC);
3744 memset(&iwe, 0, sizeof(iwe));
3745 iwe.cmd = IWEVCUSTOM;
3746 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3747 iwe.u.data.length = strlen(buf);
3748 current_ev = iwe_stream_add_point(current_ev, end_buf,
3758 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3760 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3761 char *current_ev = buf;
3762 char *end_buf = buf + len;
3763 struct ieee80211_sta_bss *bss;
3765 spin_lock_bh(&local->sta_bss_lock);
3766 list_for_each_entry(bss, &local->sta_bss_list, list) {
3767 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3768 spin_unlock_bh(&local->sta_bss_lock);
3771 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3774 spin_unlock_bh(&local->sta_bss_lock);
3775 return current_ev - buf;
3779 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3781 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3782 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3783 kfree(ifsta->extra_ie);
3785 ifsta->extra_ie = NULL;
3786 ifsta->extra_ie_len = 0;
3789 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3790 if (!ifsta->extra_ie) {
3791 ifsta->extra_ie_len = 0;
3794 memcpy(ifsta->extra_ie, ie, len);
3795 ifsta->extra_ie_len = len;
3800 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3801 struct sk_buff *skb, u8 *bssid,
3804 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3805 struct sta_info *sta;
3806 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3807 DECLARE_MAC_BUF(mac);
3809 /* TODO: Could consider removing the least recently used entry and
3810 * allow new one to be added. */
3811 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3812 if (net_ratelimit()) {
3813 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
3814 "entry %s\n", dev->name, print_mac(mac, addr));
3819 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
3820 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
3822 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3826 sta->flags |= WLAN_STA_AUTHORIZED;
3828 sta->supp_rates[local->hw.conf.channel->band] =
3829 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
3831 rate_control_rate_init(sta, local);
3833 return sta; /* caller will call sta_info_put() */
3837 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3839 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3840 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3842 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3845 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3846 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
3849 ieee80211_send_deauth(dev, ifsta, reason);
3850 ieee80211_set_disassoc(dev, ifsta, 1);
3855 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3857 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3858 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3860 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3863 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3866 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
3869 ieee80211_send_disassoc(dev, ifsta, reason);
3870 ieee80211_set_disassoc(dev, ifsta, 0);