2 * hostapd / Station table
3 * Copyright (c) 2002-2006, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
20 #include "accounting.h"
21 #include "ieee802_1x.h"
22 #include "ieee802_11.h"
27 #include "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
);
38 int ap_for_each_sta(struct hostapd_data
*hapd
,
39 int (*cb
)(struct hostapd_data
*hapd
, struct sta_info
*sta
,
45 for (sta
= hapd
->sta_list
; sta
; sta
= sta
->next
) {
46 if (cb(hapd
, sta
, ctx
))
54 struct sta_info
* ap_get_sta(struct hostapd_data
*hapd
, const u8
*sta
)
58 s
= hapd
->sta_hash
[STA_HASH(sta
)];
59 while (s
!= NULL
&& memcmp(s
->addr
, sta
, 6) != 0)
65 static void ap_sta_list_del(struct hostapd_data
*hapd
, struct sta_info
*sta
)
69 if (hapd
->sta_list
== sta
) {
70 hapd
->sta_list
= sta
->next
;
75 while (tmp
!= NULL
&& tmp
->next
!= sta
)
78 printf("Could not remove STA " MACSTR
" from list.\n",
81 tmp
->next
= sta
->next
;
85 void ap_sta_hash_add(struct hostapd_data
*hapd
, struct sta_info
*sta
)
87 sta
->hnext
= hapd
->sta_hash
[STA_HASH(sta
->addr
)];
88 hapd
->sta_hash
[STA_HASH(sta
->addr
)] = sta
;
92 static void ap_sta_hash_del(struct hostapd_data
*hapd
, struct sta_info
*sta
)
96 s
= hapd
->sta_hash
[STA_HASH(sta
->addr
)];
97 if (s
== NULL
) return;
98 if (memcmp(s
->addr
, sta
->addr
, 6) == 0) {
99 hapd
->sta_hash
[STA_HASH(sta
->addr
)] = s
->hnext
;
103 while (s
->hnext
!= NULL
&& memcmp(s
->hnext
->addr
, sta
->addr
, 6) != 0)
105 if (s
->hnext
!= NULL
)
106 s
->hnext
= s
->hnext
->hnext
;
108 printf("AP: could not remove STA " MACSTR
" from hash table\n",
113 void ap_free_sta(struct hostapd_data
*hapd
, struct sta_info
*sta
)
117 accounting_sta_stop(hapd
, sta
);
119 if (!ap_sta_in_other_bss(hapd
, sta
, WLAN_STA_ASSOC
) &&
120 !(sta
->flags
& WLAN_STA_PREAUTH
))
121 hostapd_sta_remove(hapd
, sta
->addr
);
123 ap_sta_hash_del(hapd
, sta
);
124 ap_sta_list_del(hapd
, sta
);
127 hapd
->sta_aid
[sta
->aid
- 1] = NULL
;
130 if (sta
->nonerp_set
) {
132 hapd
->iface
->num_sta_non_erp
--;
133 if (hapd
->iface
->num_sta_non_erp
== 0)
137 if (sta
->no_short_slot_time_set
) {
138 sta
->no_short_slot_time_set
= 0;
139 hapd
->iface
->num_sta_no_short_slot_time
--;
140 if (hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
141 && hapd
->iface
->num_sta_no_short_slot_time
== 0)
145 if (sta
->no_short_preamble_set
) {
146 sta
->no_short_preamble_set
= 0;
147 hapd
->iface
->num_sta_no_short_preamble
--;
148 if (hapd
->iface
->current_mode
->mode
== HOSTAPD_MODE_IEEE80211G
149 && hapd
->iface
->num_sta_no_short_preamble
== 0)
154 ieee802_11_set_beacons(hapd
->iface
);
156 eloop_cancel_timeout(ap_handle_timer
, hapd
, sta
);
157 eloop_cancel_timeout(ap_handle_session_timer
, hapd
, sta
);
159 ieee802_1x_free_station(sta
);
160 wpa_auth_sta_deinit(sta
->wpa_sm
);
161 rsn_preauth_free_station(hapd
, sta
);
162 radius_client_flush_auth(hapd
->radius
, sta
->addr
);
164 if (sta
->last_assoc_req
)
165 free(sta
->last_assoc_req
);
167 free(sta
->challenge
);
173 void hostapd_free_stas(struct hostapd_data
*hapd
)
175 struct sta_info
*sta
, *prev
;
177 sta
= hapd
->sta_list
;
181 if (sta
->flags
& WLAN_STA_AUTH
) {
182 mlme_deauthenticate_indication(
183 hapd
, sta
, WLAN_REASON_UNSPECIFIED
);
186 printf("Removing station " MACSTR
"\n", MAC2STR(prev
->addr
));
187 ap_free_sta(hapd
, prev
);
192 void ap_handle_timer(void *eloop_ctx
, void *timeout_ctx
)
194 struct hostapd_data
*hapd
= eloop_ctx
;
195 struct sta_info
*sta
= timeout_ctx
;
196 unsigned long next_time
= 0;
198 if (sta
->timeout_next
== STA_REMOVE
) {
199 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
200 HOSTAPD_LEVEL_INFO
, "deauthenticated due to "
201 "local deauth request");
202 ap_free_sta(hapd
, sta
);
206 if ((sta
->flags
& WLAN_STA_ASSOC
) &&
207 (sta
->timeout_next
== STA_NULLFUNC
||
208 sta
->timeout_next
== STA_DISASSOC
)) {
210 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
,
211 "Checking STA " MACSTR
" inactivity:\n",
213 inactive_sec
= hostapd_get_inact_sec(hapd
, sta
->addr
);
214 if (inactive_sec
== -1) {
215 printf(" Could not get station info from kernel "
216 "driver for " MACSTR
".\n",
218 } else if (inactive_sec
< hapd
->conf
->ap_max_inactivity
&&
219 sta
->flags
& WLAN_STA_ASSOC
) {
220 /* station activity detected; reset timeout state */
221 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
,
222 " Station has been active\n");
223 sta
->timeout_next
= STA_NULLFUNC
;
224 next_time
= hapd
->conf
->ap_max_inactivity
-
229 if ((sta
->flags
& WLAN_STA_ASSOC
) &&
230 sta
->timeout_next
== STA_DISASSOC
&&
231 !(sta
->flags
& WLAN_STA_PENDING_POLL
)) {
232 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
,
233 " Station has ACKed data poll\n");
234 /* data nullfunc frame poll did not produce TX errors; assume
235 * station ACKed it */
236 sta
->timeout_next
= STA_NULLFUNC
;
237 next_time
= hapd
->conf
->ap_max_inactivity
;
241 eloop_register_timeout(next_time
, 0, ap_handle_timer
, hapd
,
246 if (sta
->timeout_next
== STA_NULLFUNC
&&
247 (sta
->flags
& WLAN_STA_ASSOC
)) {
248 /* send data frame to poll STA and check whether this frame
250 struct ieee80211_hdr hdr
;
252 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
,
253 " Polling STA with data frame\n");
254 sta
->flags
|= WLAN_STA_PENDING_POLL
;
256 #ifndef CONFIG_NATIVE_WINDOWS
257 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
258 * it is apparently not retried so TX Exc events are not
260 memset(&hdr
, 0, sizeof(hdr
));
262 IEEE80211_FC(WLAN_FC_TYPE_DATA
, WLAN_FC_STYPE_DATA
);
263 hdr
.frame_control
|= host_to_le16(BIT(1));
264 hdr
.frame_control
|= host_to_le16(WLAN_FC_FROMDS
);
265 memcpy(hdr
.IEEE80211_DA_FROMDS
, sta
->addr
, ETH_ALEN
);
266 memcpy(hdr
.IEEE80211_BSSID_FROMDS
, hapd
->own_addr
, ETH_ALEN
);
267 memcpy(hdr
.IEEE80211_SA_FROMDS
, hapd
->own_addr
, ETH_ALEN
);
269 if (hostapd_send_mgmt_frame(hapd
, &hdr
, sizeof(hdr
), 0) < 0)
270 perror("ap_handle_timer: send");
271 #endif /* CONFIG_NATIVE_WINDOWS */
272 } else if (sta
->timeout_next
!= STA_REMOVE
) {
273 int deauth
= sta
->timeout_next
== STA_DEAUTH
;
275 printf(" Sending %s info to STA " MACSTR
"\n",
276 deauth
? "deauthentication" : "disassociation",
280 hostapd_sta_deauth(hapd
, sta
->addr
,
281 WLAN_REASON_PREV_AUTH_NOT_VALID
);
283 hostapd_sta_disassoc(
285 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
289 switch (sta
->timeout_next
) {
291 sta
->timeout_next
= STA_DISASSOC
;
292 eloop_register_timeout(AP_DISASSOC_DELAY
, 0, ap_handle_timer
,
296 sta
->flags
&= ~WLAN_STA_ASSOC
;
297 ieee802_1x_notify_port_enabled(sta
->eapol_sm
, 0);
298 if (!sta
->acct_terminate_cause
)
299 sta
->acct_terminate_cause
=
300 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT
;
301 accounting_sta_stop(hapd
, sta
);
302 ieee802_1x_free_station(sta
);
303 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
304 HOSTAPD_LEVEL_INFO
, "disassociated due to "
306 sta
->timeout_next
= STA_DEAUTH
;
307 eloop_register_timeout(AP_DEAUTH_DELAY
, 0, ap_handle_timer
,
309 mlme_disassociate_indication(
310 hapd
, sta
, WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY
);
314 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
315 HOSTAPD_LEVEL_INFO
, "deauthenticated due to "
317 if (!sta
->acct_terminate_cause
)
318 sta
->acct_terminate_cause
=
319 RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT
;
320 mlme_deauthenticate_indication(
322 WLAN_REASON_PREV_AUTH_NOT_VALID
);
323 ap_free_sta(hapd
, sta
);
329 static void ap_handle_session_timer(void *eloop_ctx
, void *timeout_ctx
)
331 struct hostapd_data
*hapd
= eloop_ctx
;
332 struct sta_info
*sta
= timeout_ctx
;
335 if (!(sta
->flags
& WLAN_STA_AUTH
))
338 mlme_deauthenticate_indication(hapd
, sta
,
339 WLAN_REASON_PREV_AUTH_NOT_VALID
);
340 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
341 HOSTAPD_LEVEL_INFO
, "deauthenticated due to "
343 sta
->acct_terminate_cause
=
344 RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT
;
345 memcpy(addr
, sta
->addr
, ETH_ALEN
);
346 ap_free_sta(hapd
, sta
);
347 hostapd_sta_deauth(hapd
, addr
, WLAN_REASON_PREV_AUTH_NOT_VALID
);
351 void ap_sta_session_timeout(struct hostapd_data
*hapd
, struct sta_info
*sta
,
354 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
355 HOSTAPD_LEVEL_DEBUG
, "setting session timeout to %d "
356 "seconds", session_timeout
);
357 eloop_cancel_timeout(ap_handle_session_timer
, hapd
, sta
);
358 eloop_register_timeout(session_timeout
, 0, ap_handle_session_timer
,
363 void ap_sta_no_session_timeout(struct hostapd_data
*hapd
, struct sta_info
*sta
)
365 eloop_cancel_timeout(ap_handle_session_timer
, hapd
, sta
);
369 struct sta_info
* ap_sta_add(struct hostapd_data
*hapd
, const u8
*addr
)
371 struct sta_info
*sta
;
373 sta
= ap_get_sta(hapd
, addr
);
377 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
, " New STA\n");
378 if (hapd
->num_sta
>= hapd
->conf
->max_num_sta
) {
379 /* FIX: might try to remove some old STAs first? */
380 printf(" no more room for new STAs (%d/%d)\n",
381 hapd
->num_sta
, hapd
->conf
->max_num_sta
);
385 sta
= wpa_zalloc(sizeof(struct sta_info
));
387 printf(" malloc failed\n");
390 sta
->acct_interim_interval
= hapd
->conf
->radius
->acct_interim_interval
;
392 /* initialize STA info data */
393 eloop_register_timeout(hapd
->conf
->ap_max_inactivity
, 0,
394 ap_handle_timer
, hapd
, sta
);
395 memcpy(sta
->addr
, addr
, ETH_ALEN
);
396 sta
->next
= hapd
->sta_list
;
397 hapd
->sta_list
= sta
;
399 ap_sta_hash_add(hapd
, sta
);
400 sta
->ssid
= &hapd
->conf
->ssid
;
406 static int ap_sta_remove(struct hostapd_data
*hapd
, struct sta_info
*sta
)
408 ieee802_1x_notify_port_enabled(sta
->eapol_sm
, 0);
410 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
, "Removing STA " MACSTR
411 " from kernel driver\n", MAC2STR(sta
->addr
));
412 if (hostapd_sta_remove(hapd
, sta
->addr
) &&
413 sta
->flags
& WLAN_STA_ASSOC
) {
414 printf("Could not remove station " MACSTR
" from kernel "
415 "driver.\n", MAC2STR(sta
->addr
));
422 static int ap_sta_in_other_bss(struct hostapd_data
*hapd
,
423 struct sta_info
*sta
, u32 flags
)
425 struct hostapd_iface
*iface
= hapd
->iface
;
428 for (i
= 0; i
< iface
->num_bss
; i
++) {
429 struct hostapd_data
*bss
= iface
->bss
[i
];
430 struct sta_info
*sta2
;
431 /* bss should always be set during operation, but it may be
432 * NULL during reconfiguration. Assume the STA is not
433 * associated to another BSS in that case to avoid NULL pointer
435 if (bss
== hapd
|| bss
== NULL
)
437 sta2
= ap_get_sta(bss
, sta
->addr
);
438 if (sta2
&& ((sta2
->flags
& flags
) == flags
))
446 void ap_sta_disassociate(struct hostapd_data
*hapd
, struct sta_info
*sta
,
449 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
, "%s: disassociate STA " MACSTR
450 "\n", hapd
->conf
->iface
, MAC2STR(sta
->addr
));
451 sta
->flags
&= ~WLAN_STA_ASSOC
;
452 if (!ap_sta_in_other_bss(hapd
, sta
, WLAN_STA_ASSOC
))
453 ap_sta_remove(hapd
, sta
);
454 sta
->timeout_next
= STA_DEAUTH
;
455 eloop_cancel_timeout(ap_handle_timer
, hapd
, sta
);
456 eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DISASSOC
, 0,
457 ap_handle_timer
, hapd
, sta
);
458 accounting_sta_stop(hapd
, sta
);
459 ieee802_1x_free_station(sta
);
461 mlme_disassociate_indication(hapd
, sta
, reason
);
465 void ap_sta_deauthenticate(struct hostapd_data
*hapd
, struct sta_info
*sta
,
468 HOSTAPD_DEBUG(HOSTAPD_DEBUG_MINIMAL
, "%s: deauthenticate STA " MACSTR
469 "\n", hapd
->conf
->iface
, MAC2STR(sta
->addr
));
470 sta
->flags
&= ~(WLAN_STA_AUTH
| WLAN_STA_ASSOC
);
471 if (!ap_sta_in_other_bss(hapd
, sta
, WLAN_STA_ASSOC
))
472 ap_sta_remove(hapd
, sta
);
473 sta
->timeout_next
= STA_REMOVE
;
474 eloop_cancel_timeout(ap_handle_timer
, hapd
, sta
);
475 eloop_register_timeout(AP_MAX_INACTIVITY_AFTER_DEAUTH
, 0,
476 ap_handle_timer
, hapd
, sta
);
477 accounting_sta_stop(hapd
, sta
);
478 ieee802_1x_free_station(sta
);
480 mlme_deauthenticate_indication(hapd
, sta
, reason
);
484 int ap_sta_bind_vlan(struct hostapd_data
*hapd
, struct sta_info
*sta
,
488 struct hostapd_vlan
*vlan
= NULL
;
491 * Do not proceed furthur if the vlan id remains same. We do not want
492 * duplicate dynamic vlan entries.
494 if (sta
->vlan_id
== old_vlanid
)
498 * During 1x reauth, if the vlan id changes, then remove the old id and
499 * proceed furthur to add the new one.
502 vlan_remove_dynamic(hapd
, old_vlanid
);
504 iface
= hapd
->conf
->iface
;
505 if (sta
->ssid
->vlan
[0])
506 iface
= sta
->ssid
->vlan
;
508 if (sta
->ssid
->dynamic_vlan
== DYNAMIC_VLAN_DISABLED
)
510 else if (sta
->vlan_id
> 0) {
511 vlan
= hapd
->conf
->vlan
;
513 if (vlan
->vlan_id
== sta
->vlan_id
||
514 vlan
->vlan_id
== VLAN_ID_WILDCARD
) {
515 iface
= vlan
->ifname
;
522 if (sta
->vlan_id
> 0 && vlan
== NULL
) {
523 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
524 HOSTAPD_LEVEL_DEBUG
, "could not find VLAN for "
525 "binding station to (vlan_id=%d)",
528 } else if (sta
->vlan_id
> 0 && vlan
->vlan_id
== VLAN_ID_WILDCARD
) {
529 vlan
= vlan_add_dynamic(hapd
, vlan
, sta
->vlan_id
);
531 hostapd_logger(hapd
, sta
->addr
,
532 HOSTAPD_MODULE_IEEE80211
,
533 HOSTAPD_LEVEL_DEBUG
, "could not add "
534 "dynamic VLAN interface for vlan_id=%d",
539 iface
= vlan
->ifname
;
540 if (vlan_setup_encryption_dyn(hapd
, sta
->ssid
, iface
) != 0) {
541 hostapd_logger(hapd
, sta
->addr
,
542 HOSTAPD_MODULE_IEEE80211
,
543 HOSTAPD_LEVEL_DEBUG
, "could not "
544 "configure encryption for dynamic VLAN "
545 "interface for vlan_id=%d",
549 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
550 HOSTAPD_LEVEL_DEBUG
, "added new dynamic VLAN "
551 "interface '%s'", iface
);
552 } else if (vlan
&& vlan
->vlan_id
== sta
->vlan_id
) {
553 if (sta
->vlan_id
> 0) {
554 vlan
->dynamic_vlan
++;
555 hostapd_logger(hapd
, sta
->addr
,
556 HOSTAPD_MODULE_IEEE80211
,
557 HOSTAPD_LEVEL_DEBUG
, "updated existing "
558 "dynamic VLAN interface '%s'", iface
);
562 * Update encryption configuration for statically generated
563 * VLAN interface. This is only used for static WEP
564 * configuration for the case where hostapd did not yet know
565 * which keys are to be used when the interface was added.
567 if (vlan_setup_encryption_dyn(hapd
, sta
->ssid
, iface
) != 0) {
568 hostapd_logger(hapd
, sta
->addr
,
569 HOSTAPD_MODULE_IEEE80211
,
570 HOSTAPD_LEVEL_DEBUG
, "could not "
571 "configure encryption for VLAN "
572 "interface for vlan_id=%d",
577 hostapd_logger(hapd
, sta
->addr
, HOSTAPD_MODULE_IEEE80211
,
578 HOSTAPD_LEVEL_DEBUG
, "binding station to interface "
581 if (wpa_auth_sta_set_vlan(sta
->wpa_sm
, sta
->vlan_id
) < 0)
582 wpa_printf(MSG_INFO
, "Failed to update VLAN-ID for WPA");
584 return hostapd_set_sta_vlan(iface
, hapd
, sta
->addr
, sta
->vlan_id
);