2 * hostapd / Station table
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
4 * Copyright (c) 2007-2008, Intel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Alternatively, this software may be distributed under the terms of BSD
13 * See README and COPYING for more details.
21 #include "accounting.h"
22 #include "ieee802_1x.h"
23 #include "ieee802_11.h"
24 #include "radius/radius.h"
27 #include "radius/radius_client.h"
30 #include "hw_features.h"
32 #include "vlan_init.h"
34 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
35 struct sta_info *sta, u32 flags);
36 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx);
37 #ifdef CONFIG_IEEE80211W
38 static void ap_ping_timer(void *eloop_ctx, void *timeout_ctx);
39 #endif /* CONFIG_IEEE80211W */
41 int ap_for_each_sta(struct hostapd_data *hapd,
42 int (*cb)(struct hostapd_data *hapd, struct sta_info *sta,
48 for (sta = hapd->sta_list; sta; sta = sta->next) {
49 if (cb(hapd, sta, ctx))
57 struct sta_info * ap_get_sta(struct hostapd_data *hapd, const u8 *sta)
61 s = hapd->sta_hash[STA_HASH(sta)];
62 while (s != NULL && os_memcmp(s->addr, sta, 6) != 0)
68 static void ap_sta_list_del(struct hostapd_data *hapd, struct sta_info *sta)
72 if (hapd->sta_list == sta) {
73 hapd->sta_list = sta->next;
78 while (tmp != NULL && tmp->next != sta)
81 wpa_printf(MSG_DEBUG, "Could not remove STA " MACSTR " from "
82 "list.", MAC2STR(sta->addr));
84 tmp->next = sta->next;
88 void ap_sta_hash_add(struct hostapd_data *hapd, struct sta_info *sta)
90 sta->hnext = hapd->sta_hash[STA_HASH(sta->addr)];
91 hapd->sta_hash[STA_HASH(sta->addr)] = sta;
95 static void ap_sta_hash_del(struct hostapd_data *hapd, struct sta_info *sta)
99 s = hapd->sta_hash[STA_HASH(sta->addr)];
100 if (s == NULL) return;
101 if (os_memcmp(s->addr, sta->addr, 6) == 0) {
102 hapd->sta_hash[STA_HASH(sta->addr)] = s->hnext;
106 while (s->hnext != NULL &&
107 os_memcmp(s->hnext->addr, sta->addr, ETH_ALEN) != 0)
109 if (s->hnext != NULL)
110 s->hnext = s->hnext->hnext;
112 wpa_printf(MSG_DEBUG, "AP: could not remove STA " MACSTR
113 " from hash table", MAC2STR(sta->addr));
117 void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
121 accounting_sta_stop(hapd, sta);
123 if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC) &&
124 !(sta->flags & WLAN_STA_PREAUTH))
125 hostapd_sta_remove(hapd, sta->addr);
127 ap_sta_hash_del(hapd, sta);
128 ap_sta_list_del(hapd, sta);
131 hapd->sta_aid[sta->aid - 1] = NULL;
134 if (sta->nonerp_set) {
136 hapd->iface->num_sta_non_erp--;
137 if (hapd->iface->num_sta_non_erp == 0)
141 if (sta->no_short_slot_time_set) {
142 sta->no_short_slot_time_set = 0;
143 hapd->iface->num_sta_no_short_slot_time--;
144 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
145 && hapd->iface->num_sta_no_short_slot_time == 0)
149 if (sta->no_short_preamble_set) {
150 sta->no_short_preamble_set = 0;
151 hapd->iface->num_sta_no_short_preamble--;
152 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
153 && hapd->iface->num_sta_no_short_preamble == 0)
157 #ifdef CONFIG_IEEE80211N
158 if (sta->flags & WLAN_STA_HT) {
159 u16 ht_capab = le_to_host16(
160 sta->ht_capabilities.data.capabilities_info);
161 if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0)
162 hapd->iface->num_sta_ht_no_gf--;
163 if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0)
164 hapd->iface->num_sta_ht_20mhz--;
166 hapd->iface->num_sta_no_ht--;
168 if (hostapd_ht_operation_update(hapd->iface) > 0)
170 #endif /* CONFIG_IEEE80211N */
173 ieee802_11_set_beacons(hapd->iface);
175 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
176 eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
178 ieee802_1x_free_station(sta);
179 wpa_auth_sta_deinit(sta->wpa_sm);
180 rsn_preauth_free_station(hapd, sta);
181 radius_client_flush_auth(hapd->radius, sta->addr);
183 os_free(sta->last_assoc_req);
184 os_free(sta->challenge);
186 #ifdef CONFIG_IEEE80211W
187 os_free(sta->ping_trans_id);
188 eloop_cancel_timeout(ap_ping_timer, hapd, sta);
189 #endif /* CONFIG_IEEE80211W */
191 wpabuf_free(sta->wps_ie);
197 void hostapd_free_stas(struct hostapd_data *hapd)
199 struct sta_info *sta, *prev;
201 sta = hapd->sta_list;
205 if (sta->flags & WLAN_STA_AUTH) {
206 mlme_deauthenticate_indication(
207 hapd, sta, WLAN_REASON_UNSPECIFIED);
210 wpa_printf(MSG_DEBUG, "Removing station " MACSTR,
211 MAC2STR(prev->addr));
212 ap_free_sta(hapd, prev);
217 void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
219 struct hostapd_data *hapd = eloop_ctx;
220 struct sta_info *sta = timeout_ctx;
221 unsigned long next_time = 0;
223 if (sta->timeout_next == STA_REMOVE) {
224 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
225 HOSTAPD_LEVEL_INFO, "deauthenticated due to "
226 "local deauth request");
227 ap_free_sta(hapd, sta);
231 if ((sta->flags & WLAN_STA_ASSOC) &&
232 (sta->timeout_next == STA_NULLFUNC ||
233 sta->timeout_next == STA_DISASSOC)) {
235 wpa_printf(MSG_DEBUG, "Checking STA " MACSTR " inactivity:",
237 inactive_sec = hostapd_get_inact_sec(hapd, sta->addr);
238 if (inactive_sec == -1) {
239 wpa_printf(MSG_DEBUG, "Could not get station info "
240 "from kernel driver for " MACSTR ".",
242 } else if (inactive_sec < hapd->conf->ap_max_inactivity &&
243 sta->flags & WLAN_STA_ASSOC) {
244 /* station activity detected; reset timeout state */
245 wpa_printf(MSG_DEBUG, " Station has been active");
246 sta->timeout_next = STA_NULLFUNC;
247 next_time = hapd->conf->ap_max_inactivity -
252 if ((sta->flags & WLAN_STA_ASSOC) &&
253 sta->timeout_next == STA_DISASSOC &&
254 !(sta->flags & WLAN_STA_PENDING_POLL)) {
255 wpa_printf(MSG_DEBUG, " Station has ACKed data poll");
256 /* data nullfunc frame poll did not produce TX errors; assume
257 * station ACKed it */
258 sta->timeout_next = STA_NULLFUNC;
259 next_time = hapd->conf->ap_max_inactivity;
263 eloop_register_timeout(next_time, 0, ap_handle_timer, hapd,
268 if (sta->timeout_next == STA_NULLFUNC &&
269 (sta->flags & WLAN_STA_ASSOC)) {
270 /* send data frame to poll STA and check whether this frame
272 struct ieee80211_hdr hdr;
274 wpa_printf(MSG_DEBUG, " Polling STA with data frame");
275 sta->flags |= WLAN_STA_PENDING_POLL;
277 #ifndef CONFIG_NATIVE_WINDOWS
278 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
279 * it is apparently not retried so TX Exc events are not
281 os_memset(&hdr, 0, sizeof(hdr));
283 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
284 hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
285 os_memcpy(hdr.IEEE80211_DA_FROMDS, sta->addr, ETH_ALEN);
286 os_memcpy(hdr.IEEE80211_BSSID_FROMDS, hapd->own_addr,
288 os_memcpy(hdr.IEEE80211_SA_FROMDS, hapd->own_addr, ETH_ALEN);
290 if (hostapd_send_mgmt_frame(hapd, &hdr, sizeof(hdr), 0) < 0)
291 perror("ap_handle_timer: send");
292 #endif /* CONFIG_NATIVE_WINDOWS */
293 } else if (sta->timeout_next != STA_REMOVE) {
294 int deauth = sta->timeout_next == STA_DEAUTH;
296 wpa_printf(MSG_DEBUG, "Sending %s info to STA " MACSTR,
297 deauth ? "deauthentication" : "disassociation",
301 hostapd_sta_deauth(hapd, sta->addr,
302 WLAN_REASON_PREV_AUTH_NOT_VALID);
304 hostapd_sta_disassoc(
306 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
310 switch (sta->timeout_next) {
312 sta->timeout_next = STA_DISASSOC;
313 eloop_register_timeout(AP_DISASSOC_DELAY, 0, ap_handle_timer,
317 sta->flags &= ~WLAN_STA_ASSOC;
318 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
319 if (!sta->acct_terminate_cause)
320 sta->acct_terminate_cause =
321 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
322 accounting_sta_stop(hapd, sta);
323 ieee802_1x_free_station(sta);
324 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
325 HOSTAPD_LEVEL_INFO, "disassociated due to "
327 sta->timeout_next = STA_DEAUTH;
328 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
330 mlme_disassociate_indication(
331 hapd, sta, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
335 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
336 HOSTAPD_LEVEL_INFO, "deauthenticated due to "
338 if (!sta->acct_terminate_cause)
339 sta->acct_terminate_cause =
340 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT;
341 mlme_deauthenticate_indication(
343 WLAN_REASON_PREV_AUTH_NOT_VALID);
344 ap_free_sta(hapd, sta);
350 static void ap_handle_session_timer(void *eloop_ctx, void *timeout_ctx)
352 struct hostapd_data *hapd = eloop_ctx;
353 struct sta_info *sta = timeout_ctx;
356 if (!(sta->flags & WLAN_STA_AUTH))
359 mlme_deauthenticate_indication(hapd, sta,
360 WLAN_REASON_PREV_AUTH_NOT_VALID);
361 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
362 HOSTAPD_LEVEL_INFO, "deauthenticated due to "
364 sta->acct_terminate_cause =
365 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT;
366 os_memcpy(addr, sta->addr, ETH_ALEN);
367 ap_free_sta(hapd, sta);
368 hostapd_sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
372 void ap_sta_session_timeout(struct hostapd_data *hapd, struct sta_info *sta,
375 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
376 HOSTAPD_LEVEL_DEBUG, "setting session timeout to %d "
377 "seconds", session_timeout);
378 eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
379 eloop_register_timeout(session_timeout, 0, ap_handle_session_timer,
384 void ap_sta_no_session_timeout(struct hostapd_data *hapd, struct sta_info *sta)
386 eloop_cancel_timeout(ap_handle_session_timer, hapd, sta);
390 struct sta_info * ap_sta_add(struct hostapd_data *hapd, const u8 *addr)
392 struct sta_info *sta;
394 sta = ap_get_sta(hapd, addr);
398 wpa_printf(MSG_DEBUG, " New STA");
399 if (hapd->num_sta >= hapd->conf->max_num_sta) {
400 /* FIX: might try to remove some old STAs first? */
401 wpa_printf(MSG_DEBUG, "no more room for new STAs (%d/%d)",
402 hapd->num_sta, hapd->conf->max_num_sta);
406 sta = os_zalloc(sizeof(struct sta_info));
408 wpa_printf(MSG_ERROR, "malloc failed");
411 sta->acct_interim_interval = hapd->conf->radius->acct_interim_interval;
413 /* initialize STA info data */
414 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
415 ap_handle_timer, hapd, sta);
416 os_memcpy(sta->addr, addr, ETH_ALEN);
417 sta->next = hapd->sta_list;
418 hapd->sta_list = sta;
420 ap_sta_hash_add(hapd, sta);
421 sta->ssid = &hapd->conf->ssid;
427 static int ap_sta_remove(struct hostapd_data *hapd, struct sta_info *sta)
429 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
431 wpa_printf(MSG_DEBUG, "Removing STA " MACSTR " from kernel driver",
433 if (hostapd_sta_remove(hapd, sta->addr) &&
434 sta->flags & WLAN_STA_ASSOC) {
435 wpa_printf(MSG_DEBUG, "Could not remove station " MACSTR
436 " from kernel driver.", MAC2STR(sta->addr));
443 static int ap_sta_in_other_bss(struct hostapd_data *hapd,
444 struct sta_info *sta, u32 flags)
446 struct hostapd_iface *iface = hapd->iface;
449 for (i = 0; i < iface->num_bss; i++) {
450 struct hostapd_data *bss = iface->bss[i];
451 struct sta_info *sta2;
452 /* bss should always be set during operation, but it may be
453 * NULL during reconfiguration. Assume the STA is not
454 * associated to another BSS in that case to avoid NULL pointer
456 if (bss == hapd || bss == NULL)
458 sta2 = ap_get_sta(bss, sta->addr);
459 if (sta2 && ((sta2->flags & flags) == flags))
467 void ap_sta_disassociate(struct hostapd_data *hapd, struct sta_info *sta,
470 wpa_printf(MSG_DEBUG, "%s: disassociate STA " MACSTR,
471 hapd->conf->iface, MAC2STR(sta->addr));
472 sta->flags &= ~WLAN_STA_ASSOC;
473 if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
474 ap_sta_remove(hapd, sta);
475 sta->timeout_next = STA_DEAUTH;
476 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
477 eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC, 0,
478 ap_handle_timer, hapd, sta);
479 accounting_sta_stop(hapd, sta);
480 ieee802_1x_free_station(sta);
482 mlme_disassociate_indication(hapd, sta, reason);
486 void ap_sta_deauthenticate(struct hostapd_data *hapd, struct sta_info *sta,
489 wpa_printf(MSG_DEBUG, "%s: deauthenticate STA " MACSTR,
490 hapd->conf->iface, MAC2STR(sta->addr));
491 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
492 if (!ap_sta_in_other_bss(hapd, sta, WLAN_STA_ASSOC))
493 ap_sta_remove(hapd, sta);
494 sta->timeout_next = STA_REMOVE;
495 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
496 eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH, 0,
497 ap_handle_timer, hapd, sta);
498 accounting_sta_stop(hapd, sta);
499 ieee802_1x_free_station(sta);
501 mlme_deauthenticate_indication(hapd, sta, reason);
505 int ap_sta_bind_vlan(struct hostapd_data *hapd, struct sta_info *sta,
509 struct hostapd_vlan *vlan = NULL;
512 * Do not proceed furthur if the vlan id remains same. We do not want
513 * duplicate dynamic vlan entries.
515 if (sta->vlan_id == old_vlanid)
519 * During 1x reauth, if the vlan id changes, then remove the old id and
520 * proceed furthur to add the new one.
523 vlan_remove_dynamic(hapd, old_vlanid);
525 iface = hapd->conf->iface;
526 if (sta->ssid->vlan[0])
527 iface = sta->ssid->vlan;
529 if (sta->ssid->dynamic_vlan == DYNAMIC_VLAN_DISABLED)
531 else if (sta->vlan_id > 0) {
532 vlan = hapd->conf->vlan;
534 if (vlan->vlan_id == sta->vlan_id ||
535 vlan->vlan_id == VLAN_ID_WILDCARD) {
536 iface = vlan->ifname;
543 if (sta->vlan_id > 0 && vlan == NULL) {
544 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
545 HOSTAPD_LEVEL_DEBUG, "could not find VLAN for "
546 "binding station to (vlan_id=%d)",
549 } else if (sta->vlan_id > 0 && vlan->vlan_id == VLAN_ID_WILDCARD) {
550 vlan = vlan_add_dynamic(hapd, vlan, sta->vlan_id);
552 hostapd_logger(hapd, sta->addr,
553 HOSTAPD_MODULE_IEEE80211,
554 HOSTAPD_LEVEL_DEBUG, "could not add "
555 "dynamic VLAN interface for vlan_id=%d",
560 iface = vlan->ifname;
561 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
562 hostapd_logger(hapd, sta->addr,
563 HOSTAPD_MODULE_IEEE80211,
564 HOSTAPD_LEVEL_DEBUG, "could not "
565 "configure encryption for dynamic VLAN "
566 "interface for vlan_id=%d",
570 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
571 HOSTAPD_LEVEL_DEBUG, "added new dynamic VLAN "
572 "interface '%s'", iface);
573 } else if (vlan && vlan->vlan_id == sta->vlan_id) {
574 if (sta->vlan_id > 0) {
575 vlan->dynamic_vlan++;
576 hostapd_logger(hapd, sta->addr,
577 HOSTAPD_MODULE_IEEE80211,
578 HOSTAPD_LEVEL_DEBUG, "updated existing "
579 "dynamic VLAN interface '%s'", iface);
583 * Update encryption configuration for statically generated
584 * VLAN interface. This is only used for static WEP
585 * configuration for the case where hostapd did not yet know
586 * which keys are to be used when the interface was added.
588 if (vlan_setup_encryption_dyn(hapd, sta->ssid, iface) != 0) {
589 hostapd_logger(hapd, sta->addr,
590 HOSTAPD_MODULE_IEEE80211,
591 HOSTAPD_LEVEL_DEBUG, "could not "
592 "configure encryption for VLAN "
593 "interface for vlan_id=%d",
598 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
599 HOSTAPD_LEVEL_DEBUG, "binding station to interface "
602 if (wpa_auth_sta_set_vlan(sta->wpa_sm, sta->vlan_id) < 0)
603 wpa_printf(MSG_INFO, "Failed to update VLAN-ID for WPA");
605 return hostapd_set_sta_vlan(iface, hapd, sta->addr, sta->vlan_id);
609 #ifdef CONFIG_IEEE80211W
611 /* MLME-PING.request */
612 static void ieee802_11_send_ping_req(struct hostapd_data *hapd, const u8 *addr,
615 struct ieee80211_mgmt mgmt;
618 os_memset(&mgmt, 0, sizeof(mgmt));
619 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
620 WLAN_FC_STYPE_ACTION);
621 os_memcpy(mgmt.da, addr, ETH_ALEN);
622 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
623 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
624 mgmt.u.action.category = WLAN_ACTION_PING;
625 mgmt.u.action.u.ping_req.action = WLAN_PING_REQUEST;
626 os_memcpy(mgmt.u.action.u.ping_req.trans_id, trans_id,
627 WLAN_PING_TRANS_ID_LEN);
628 end = mgmt.u.action.u.ping_req.trans_id + WLAN_PING_TRANS_ID_LEN;
629 if (hostapd_send_mgmt_frame(hapd, &mgmt, IEEE80211_HDRLEN +
630 end - (u8 *) &mgmt, 0) < 0)
631 perror("ieee802_11_send_ping_req: send");
635 static void ap_ping_timer(void *eloop_ctx, void *timeout_ctx)
637 struct hostapd_data *hapd = eloop_ctx;
638 struct sta_info *sta = timeout_ctx;
639 unsigned int timeout, sec, usec;
642 if (sta->ping_count >= hapd->conf->assoc_ping_attempts) {
643 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
645 "association ping timed out");
646 sta->ping_timed_out = 1;
647 os_free(sta->ping_trans_id);
648 sta->ping_trans_id = NULL;
653 nbuf = os_realloc(sta->ping_trans_id,
654 (sta->ping_count + 1) * WLAN_PING_TRANS_ID_LEN);
657 trans_id = nbuf + sta->ping_count * WLAN_PING_TRANS_ID_LEN;
658 sta->ping_trans_id = nbuf;
661 os_get_random(trans_id, WLAN_PING_TRANS_ID_LEN);
663 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
665 "association ping attempt %d", sta->ping_count);
667 ieee802_11_send_ping_req(hapd, sta->addr, trans_id);
669 timeout = hapd->conf->assoc_ping_timeout;
670 sec = ((timeout / 1000) * 1024) / 1000;
671 usec = (timeout % 1000) * 1024;
672 eloop_register_timeout(sec, usec, ap_ping_timer, hapd, sta);
676 void ap_sta_start_ping(struct hostapd_data *hapd, struct sta_info *sta)
678 ap_ping_timer(hapd, sta);
682 void ap_sta_stop_ping(struct hostapd_data *hapd, struct sta_info *sta)
684 eloop_cancel_timeout(ap_ping_timer, hapd, sta);
685 os_free(sta->ping_trans_id);
686 sta->ping_trans_id = NULL;
690 #endif /* CONFIG_IEEE80211W */