2 * hostapd / IEEE 802.11 authentication (ACL)
3 * Copyright (c) 2003-2007, 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.
17 #ifndef CONFIG_NATIVE_WINDOWS
20 #include "ieee802_11.h"
21 #include "ieee802_11_auth.h"
22 #include "radius/radius.h"
23 #include "radius/radius_client.h"
26 #define RADIUS_ACL_TIMEOUT 30
29 struct hostapd_cached_radius_acl {
32 int accepted; /* HOSTAPD_ACL_* */
33 struct hostapd_cached_radius_acl *next;
35 u32 acct_interim_interval;
40 struct hostapd_acl_query_data {
44 u8 *auth_msg; /* IEEE 802.11 authentication frame from station */
46 struct hostapd_acl_query_data *next;
50 static void hostapd_acl_cache_free(struct hostapd_cached_radius_acl *acl_cache)
52 struct hostapd_cached_radius_acl *prev;
56 acl_cache = acl_cache->next;
62 static int hostapd_acl_cache_get(struct hostapd_data *hapd, const u8 *addr,
64 u32 *acct_interim_interval, int *vlan_id)
66 struct hostapd_cached_radius_acl *entry;
70 entry = hapd->acl_cache;
73 if (os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
74 if (now - entry->timestamp > RADIUS_ACL_TIMEOUT)
75 return -1; /* entry has expired */
76 if (entry->accepted == HOSTAPD_ACL_ACCEPT_TIMEOUT)
77 *session_timeout = entry->session_timeout;
78 *acct_interim_interval = entry->acct_interim_interval;
80 *vlan_id = entry->vlan_id;
81 return entry->accepted;
91 static void hostapd_acl_query_free(struct hostapd_acl_query_data *query)
95 os_free(query->auth_msg);
100 static int hostapd_radius_acl_query(struct hostapd_data *hapd, const u8 *addr,
101 struct hostapd_acl_query_data *query)
103 struct radius_msg *msg;
106 query->radius_id = radius_client_get_id(hapd->radius);
107 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, query->radius_id);
111 radius_msg_make_authenticator(msg, addr, ETH_ALEN);
113 os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT, MAC2STR(addr));
114 if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, (u8 *) buf,
116 wpa_printf(MSG_DEBUG, "Could not add User-Name");
120 if (!radius_msg_add_attr_user_password(
121 msg, (u8 *) buf, os_strlen(buf),
122 hapd->conf->radius->auth_server->shared_secret,
123 hapd->conf->radius->auth_server->shared_secret_len)) {
124 wpa_printf(MSG_DEBUG, "Could not add User-Password");
128 if (hapd->conf->own_ip_addr.af == AF_INET &&
129 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
130 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
131 wpa_printf(MSG_DEBUG, "Could not add NAS-IP-Address");
136 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
137 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
138 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
139 wpa_printf(MSG_DEBUG, "Could not add NAS-IPv6-Address");
142 #endif /* CONFIG_IPV6 */
144 if (hapd->conf->nas_identifier &&
145 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
146 (u8 *) hapd->conf->nas_identifier,
147 os_strlen(hapd->conf->nas_identifier))) {
148 wpa_printf(MSG_DEBUG, "Could not add NAS-Identifier");
152 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
153 MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
154 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
155 (u8 *) buf, os_strlen(buf))) {
156 wpa_printf(MSG_DEBUG, "Could not add Called-Station-Id");
160 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
162 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
163 (u8 *) buf, os_strlen(buf))) {
164 wpa_printf(MSG_DEBUG, "Could not add Calling-Station-Id");
168 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT_TYPE,
169 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
170 wpa_printf(MSG_DEBUG, "Could not add NAS-Port-Type");
174 os_snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
175 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
176 (u8 *) buf, os_strlen(buf))) {
177 wpa_printf(MSG_DEBUG, "Could not add Connect-Info");
181 radius_client_send(hapd->radius, msg, RADIUS_AUTH, addr);
185 radius_msg_free(msg);
191 int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr,
192 const u8 *msg, size_t len, u32 *session_timeout,
193 u32 *acct_interim_interval, int *vlan_id)
195 *session_timeout = 0;
196 *acct_interim_interval = 0;
200 if (hostapd_maclist_found(hapd->conf->accept_mac,
201 hapd->conf->num_accept_mac, addr))
202 return HOSTAPD_ACL_ACCEPT;
204 if (hostapd_maclist_found(hapd->conf->deny_mac,
205 hapd->conf->num_deny_mac, addr))
206 return HOSTAPD_ACL_REJECT;
208 if (hapd->conf->macaddr_acl == ACCEPT_UNLESS_DENIED)
209 return HOSTAPD_ACL_ACCEPT;
210 if (hapd->conf->macaddr_acl == DENY_UNLESS_ACCEPTED)
211 return HOSTAPD_ACL_REJECT;
213 if (hapd->conf->macaddr_acl == USE_EXTERNAL_RADIUS_AUTH) {
214 struct hostapd_acl_query_data *query;
216 /* Check whether ACL cache has an entry for this station */
217 int res = hostapd_acl_cache_get(hapd, addr, session_timeout,
218 acct_interim_interval,
220 if (res == HOSTAPD_ACL_ACCEPT ||
221 res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
223 if (res == HOSTAPD_ACL_REJECT)
224 return HOSTAPD_ACL_REJECT;
226 query = hapd->acl_queries;
228 if (os_memcmp(query->addr, addr, ETH_ALEN) == 0) {
229 /* pending query in RADIUS retransmit queue;
230 * do not generate a new one */
231 return HOSTAPD_ACL_PENDING;
236 if (!hapd->conf->radius->auth_server)
237 return HOSTAPD_ACL_REJECT;
239 /* No entry in the cache - query external RADIUS server */
240 query = os_zalloc(sizeof(*query));
242 wpa_printf(MSG_ERROR, "malloc for query data failed");
243 return HOSTAPD_ACL_REJECT;
245 time(&query->timestamp);
246 os_memcpy(query->addr, addr, ETH_ALEN);
247 if (hostapd_radius_acl_query(hapd, addr, query)) {
248 wpa_printf(MSG_DEBUG, "Failed to send Access-Request "
250 hostapd_acl_query_free(query);
251 return HOSTAPD_ACL_REJECT;
254 query->auth_msg = os_malloc(len);
255 if (query->auth_msg == NULL) {
256 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
258 hostapd_acl_query_free(query);
259 return HOSTAPD_ACL_REJECT;
261 os_memcpy(query->auth_msg, msg, len);
262 query->auth_msg_len = len;
263 query->next = hapd->acl_queries;
264 hapd->acl_queries = query;
266 /* Queued data will be processed in hostapd_acl_recv_radius()
267 * when RADIUS server replies to the sent Access-Request. */
268 return HOSTAPD_ACL_PENDING;
271 return HOSTAPD_ACL_REJECT;
275 static void hostapd_acl_expire_cache(struct hostapd_data *hapd, time_t now)
277 struct hostapd_cached_radius_acl *prev, *entry, *tmp;
280 entry = hapd->acl_cache;
283 if (now - entry->timestamp > RADIUS_ACL_TIMEOUT) {
284 wpa_printf(MSG_DEBUG, "Cached ACL entry for " MACSTR
285 " has expired.", MAC2STR(entry->addr));
287 prev->next = entry->next;
289 hapd->acl_cache = entry->next;
303 static void hostapd_acl_expire_queries(struct hostapd_data *hapd, time_t now)
305 struct hostapd_acl_query_data *prev, *entry, *tmp;
308 entry = hapd->acl_queries;
311 if (now - entry->timestamp > RADIUS_ACL_TIMEOUT) {
312 wpa_printf(MSG_DEBUG, "ACL query for " MACSTR
313 " has expired.", MAC2STR(entry->addr));
315 prev->next = entry->next;
317 hapd->acl_queries = entry->next;
321 hostapd_acl_query_free(tmp);
331 static void hostapd_acl_expire(void *eloop_ctx, void *timeout_ctx)
333 struct hostapd_data *hapd = eloop_ctx;
337 hostapd_acl_expire_cache(hapd, now);
338 hostapd_acl_expire_queries(hapd, now);
340 eloop_register_timeout(10, 0, hostapd_acl_expire, hapd, NULL);
344 /* Return 0 if RADIUS message was a reply to ACL query (and was processed here)
346 static RadiusRxResult
347 hostapd_acl_recv_radius(struct radius_msg *msg, struct radius_msg *req,
348 u8 *shared_secret, size_t shared_secret_len,
351 struct hostapd_data *hapd = data;
352 struct hostapd_acl_query_data *query, *prev;
353 struct hostapd_cached_radius_acl *cache;
355 query = hapd->acl_queries;
358 if (query->radius_id == msg->hdr->identifier)
364 return RADIUS_RX_UNKNOWN;
366 wpa_printf(MSG_DEBUG, "Found matching Access-Request for RADIUS "
367 "message (id=%d)", query->radius_id);
369 if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) {
370 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have "
371 "correct authenticator - dropped\n");
372 return RADIUS_RX_INVALID_AUTHENTICATOR;
375 if (msg->hdr->code != RADIUS_CODE_ACCESS_ACCEPT &&
376 msg->hdr->code != RADIUS_CODE_ACCESS_REJECT) {
377 wpa_printf(MSG_DEBUG, "Unknown RADIUS message code %d to ACL "
378 "query", msg->hdr->code);
379 return RADIUS_RX_UNKNOWN;
382 /* Insert Accept/Reject info into ACL cache */
383 cache = os_zalloc(sizeof(*cache));
385 wpa_printf(MSG_DEBUG, "Failed to add ACL cache entry");
388 time(&cache->timestamp);
389 os_memcpy(cache->addr, query->addr, sizeof(cache->addr));
390 if (msg->hdr->code == RADIUS_CODE_ACCESS_ACCEPT) {
391 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT,
392 &cache->session_timeout) == 0)
393 cache->accepted = HOSTAPD_ACL_ACCEPT_TIMEOUT;
395 cache->accepted = HOSTAPD_ACL_ACCEPT;
397 if (radius_msg_get_attr_int32(
398 msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL,
399 &cache->acct_interim_interval) == 0 &&
400 cache->acct_interim_interval < 60) {
401 wpa_printf(MSG_DEBUG, "Ignored too small "
402 "Acct-Interim-Interval %d for STA " MACSTR,
403 cache->acct_interim_interval,
404 MAC2STR(query->addr));
405 cache->acct_interim_interval = 0;
408 cache->vlan_id = radius_msg_get_vlanid(msg);
410 cache->accepted = HOSTAPD_ACL_REJECT;
411 cache->next = hapd->acl_cache;
412 hapd->acl_cache = cache;
414 /* Re-send original authentication frame for 802.11 processing */
415 wpa_printf(MSG_DEBUG, "Re-sending authentication frame after "
416 "successful RADIUS ACL query");
417 ieee802_11_mgmt(hapd, query->auth_msg, query->auth_msg_len,
418 WLAN_FC_STYPE_AUTH, NULL);
422 hapd->acl_queries = query->next;
424 prev->next = query->next;
426 hostapd_acl_query_free(query);
428 return RADIUS_RX_PROCESSED;
432 int hostapd_acl_init(struct hostapd_data *hapd)
434 if (radius_client_register(hapd->radius, RADIUS_AUTH,
435 hostapd_acl_recv_radius, hapd))
438 eloop_register_timeout(10, 0, hostapd_acl_expire, hapd, NULL);
444 void hostapd_acl_deinit(struct hostapd_data *hapd)
446 struct hostapd_acl_query_data *query, *prev;
448 eloop_cancel_timeout(hostapd_acl_expire, hapd, NULL);
450 hostapd_acl_cache_free(hapd->acl_cache);
452 query = hapd->acl_queries;
456 hostapd_acl_query_free(prev);
461 int hostapd_acl_reconfig(struct hostapd_data *hapd,
462 struct hostapd_config *oldconf)
464 if (!hapd->radius_client_reconfigured)
467 hostapd_acl_deinit(hapd);
468 return hostapd_acl_init(hapd);
471 #endif /* CONFIG_NATIVE_WINDOWS */