3 * Copyright (c) 2002-2009, 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.
19 #include "radius_client.h"
22 /* Defaults for RADIUS retransmit values (exponential backoff) */
25 * RADIUS_CLIENT_FIRST_WAIT - RADIUS client timeout for first retry in seconds
27 #define RADIUS_CLIENT_FIRST_WAIT 3
30 * RADIUS_CLIENT_MAX_WAIT - RADIUS client maximum retry timeout in seconds
32 #define RADIUS_CLIENT_MAX_WAIT 120
35 * RADIUS_CLIENT_MAX_RETRIES - RADIUS client maximum retries
37 * Maximum number of retransmit attempts before the entry is removed from
40 #define RADIUS_CLIENT_MAX_RETRIES 10
43 * RADIUS_CLIENT_MAX_ENTRIES - RADIUS client maximum pending messages
45 * Maximum number of entries in retransmit list (oldest entries will be
46 * removed, if this limit is exceeded).
48 #define RADIUS_CLIENT_MAX_ENTRIES 30
51 * RADIUS_CLIENT_NUM_FAILOVER - RADIUS client failover point
53 * The number of failed retry attempts after which the RADIUS server will be
54 * changed (if one of more backup servers are configured).
56 #define RADIUS_CLIENT_NUM_FAILOVER 4
60 * struct radius_rx_handler - RADIUS client RX handler
62 * This data structure is used internally inside the RADIUS client module to
63 * store registered RX handlers. These handlers are registered by calls to
64 * radius_client_register() and unregistered when the RADIUS client is
65 * deinitialized with a call to radius_client_deinit().
67 struct radius_rx_handler {
69 * handler - Received RADIUS message handler
71 RadiusRxResult (*handler)(struct radius_msg *msg,
72 struct radius_msg *req,
73 const u8 *shared_secret,
74 size_t shared_secret_len,
78 * data - Context data for the handler
85 * struct radius_msg_list - RADIUS client message retransmit list
87 * This data structure is used internally inside the RADIUS client module to
88 * store pending RADIUS requests that may still need to be retransmitted.
90 struct radius_msg_list {
92 * addr - STA/client address
94 * This is used to find RADIUS messages for the same STA.
99 * msg - RADIUS message
101 struct radius_msg *msg;
104 * msg_type - Message type
109 * first_try - Time of the first transmission attempt
114 * next_try - Time for the next transmission attempt
119 * attempts - Number of transmission attempts
124 * next_wait - Next retransmission wait time in seconds
129 * last_attempt - Time of the last transmission attempt
131 struct os_time last_attempt;
134 * shared_secret - Shared secret with the target RADIUS server
136 const u8 *shared_secret;
139 * shared_secret_len - shared_secret length in octets
141 size_t shared_secret_len;
143 /* TODO: server config with failover to backup server(s) */
146 * next - Next message in the list
148 struct radius_msg_list *next;
153 * struct radius_client_data - Internal RADIUS client data
155 * This data structure is used internally inside the RADIUS client module.
156 * External users allocate this by calling radius_client_init() and free it by
157 * calling radius_client_deinit(). The pointer to this opaque data is used in
158 * calls to other functions as an identifier for the RADIUS client instance.
160 struct radius_client_data {
162 * ctx - Context pointer for hostapd_logger() callbacks
167 * conf - RADIUS client configuration (list of RADIUS servers to use)
169 struct hostapd_radius_servers *conf;
172 * auth_serv_sock - IPv4 socket for RADIUS authentication messages
177 * acct_serv_sock - IPv4 socket for RADIUS accounting messages
182 * auth_serv_sock6 - IPv6 socket for RADIUS authentication messages
187 * acct_serv_sock6 - IPv6 socket for RADIUS accounting messages
192 * auth_sock - Currently used socket for RADIUS authentication server
197 * acct_sock - Currently used socket for RADIUS accounting server
202 * auth_handlers - Authentication message handlers
204 struct radius_rx_handler *auth_handlers;
207 * num_auth_handlers - Number of handlers in auth_handlers
209 size_t num_auth_handlers;
212 * acct_handlers - Accounting message handlers
214 struct radius_rx_handler *acct_handlers;
217 * num_acct_handlers - Number of handlers in acct_handlers
219 size_t num_acct_handlers;
222 * msgs - Pending outgoing RADIUS messages
224 struct radius_msg_list *msgs;
227 * num_msgs - Number of pending messages in the msgs list
232 * next_radius_identifier - Next RADIUS message identifier to use
234 u8 next_radius_identifier;
239 radius_change_server(struct radius_client_data *radius,
240 struct hostapd_radius_server *nserv,
241 struct hostapd_radius_server *oserv,
242 int sock, int sock6, int auth);
243 static int radius_client_init_acct(struct radius_client_data *radius);
244 static int radius_client_init_auth(struct radius_client_data *radius);
247 static void radius_client_msg_free(struct radius_msg_list *req)
249 radius_msg_free(req->msg);
255 * radius_client_register - Register a RADIUS client RX handler
256 * @radius: RADIUS client context from radius_client_init()
257 * @msg_type: RADIUS client type (RADIUS_AUTH or RADIUS_ACCT)
258 * @handler: Handler for received RADIUS messages
259 * @data: Context pointer for handler callbacks
260 * Returns: 0 on success, -1 on failure
262 * This function is used to register a handler for processing received RADIUS
263 * authentication and accounting messages. The handler() callback function will
264 * be called whenever a RADIUS message is received from the active server.
266 * There can be multiple registered RADIUS message handlers. The handlers will
267 * be called in order until one of them indicates that it has processed or
268 * queued the message.
270 int radius_client_register(struct radius_client_data *radius,
272 RadiusRxResult (*handler)(struct radius_msg *msg,
273 struct radius_msg *req,
274 const u8 *shared_secret,
275 size_t shared_secret_len,
279 struct radius_rx_handler **handlers, *newh;
282 if (msg_type == RADIUS_ACCT) {
283 handlers = &radius->acct_handlers;
284 num = &radius->num_acct_handlers;
286 handlers = &radius->auth_handlers;
287 num = &radius->num_auth_handlers;
290 newh = os_realloc(*handlers,
291 (*num + 1) * sizeof(struct radius_rx_handler));
295 newh[*num].handler = handler;
296 newh[*num].data = data;
304 static void radius_client_handle_send_error(struct radius_client_data *radius,
305 int s, RadiusType msg_type)
307 #ifndef CONFIG_NATIVE_WINDOWS
309 perror("send[RADIUS]");
310 if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL ||
312 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
314 "Send failed - maybe interface status changed -"
315 " try to connect again");
316 eloop_unregister_read_sock(s);
318 if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM)
319 radius_client_init_acct(radius);
321 radius_client_init_auth(radius);
323 #endif /* CONFIG_NATIVE_WINDOWS */
327 static int radius_client_retransmit(struct radius_client_data *radius,
328 struct radius_msg_list *entry,
331 struct hostapd_radius_servers *conf = radius->conf;
334 if (entry->msg_type == RADIUS_ACCT ||
335 entry->msg_type == RADIUS_ACCT_INTERIM) {
336 s = radius->acct_sock;
337 if (entry->attempts == 0)
338 conf->acct_server->requests++;
340 conf->acct_server->timeouts++;
341 conf->acct_server->retransmissions++;
344 s = radius->auth_sock;
345 if (entry->attempts == 0)
346 conf->auth_server->requests++;
348 conf->auth_server->timeouts++;
349 conf->auth_server->retransmissions++;
353 /* retransmit; remove entry if too many attempts */
355 hostapd_logger(radius->ctx, entry->addr, HOSTAPD_MODULE_RADIUS,
356 HOSTAPD_LEVEL_DEBUG, "Resending RADIUS message (id=%d)",
357 entry->msg->hdr->identifier);
359 os_get_time(&entry->last_attempt);
360 if (send(s, entry->msg->buf, entry->msg->buf_used, 0) < 0)
361 radius_client_handle_send_error(radius, s, entry->msg_type);
363 entry->next_try = now + entry->next_wait;
364 entry->next_wait *= 2;
365 if (entry->next_wait > RADIUS_CLIENT_MAX_WAIT)
366 entry->next_wait = RADIUS_CLIENT_MAX_WAIT;
367 if (entry->attempts >= RADIUS_CLIENT_MAX_RETRIES) {
368 printf("Removing un-ACKed RADIUS message due to too many "
369 "failed retransmit attempts\n");
377 static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
379 struct radius_client_data *radius = eloop_ctx;
380 struct hostapd_radius_servers *conf = radius->conf;
383 struct radius_msg_list *entry, *prev, *tmp;
384 int auth_failover = 0, acct_failover = 0;
387 entry = radius->msgs;
396 if (now.sec >= entry->next_try &&
397 radius_client_retransmit(radius, entry, now.sec)) {
399 prev->next = entry->next;
401 radius->msgs = entry->next;
405 radius_client_msg_free(tmp);
410 if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
411 if (entry->msg_type == RADIUS_ACCT ||
412 entry->msg_type == RADIUS_ACCT_INTERIM)
418 if (first == 0 || entry->next_try < first)
419 first = entry->next_try;
428 eloop_register_timeout(first - now.sec, 0,
429 radius_client_timer, radius, NULL);
430 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
431 HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
432 "retransmit in %ld seconds",
433 (long int) (first - now.sec));
436 if (auth_failover && conf->num_auth_servers > 1) {
437 struct hostapd_radius_server *next, *old;
438 old = conf->auth_server;
439 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
440 HOSTAPD_LEVEL_NOTICE,
441 "No response from Authentication server "
443 hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
446 for (entry = radius->msgs; entry; entry = entry->next) {
447 if (entry->msg_type == RADIUS_AUTH)
452 if (next > &(conf->auth_servers[conf->num_auth_servers - 1]))
453 next = conf->auth_servers;
454 conf->auth_server = next;
455 radius_change_server(radius, next, old,
456 radius->auth_serv_sock,
457 radius->auth_serv_sock6, 1);
460 if (acct_failover && conf->num_acct_servers > 1) {
461 struct hostapd_radius_server *next, *old;
462 old = conf->acct_server;
463 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
464 HOSTAPD_LEVEL_NOTICE,
465 "No response from Accounting server "
467 hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
470 for (entry = radius->msgs; entry; entry = entry->next) {
471 if (entry->msg_type == RADIUS_ACCT ||
472 entry->msg_type == RADIUS_ACCT_INTERIM)
477 if (next > &conf->acct_servers[conf->num_acct_servers - 1])
478 next = conf->acct_servers;
479 conf->acct_server = next;
480 radius_change_server(radius, next, old,
481 radius->acct_serv_sock,
482 radius->acct_serv_sock6, 0);
487 static void radius_client_update_timeout(struct radius_client_data *radius)
491 struct radius_msg_list *entry;
493 eloop_cancel_timeout(radius_client_timer, radius, NULL);
495 if (radius->msgs == NULL) {
500 for (entry = radius->msgs; entry; entry = entry->next) {
501 if (first == 0 || entry->next_try < first)
502 first = entry->next_try;
508 eloop_register_timeout(first - now.sec, 0, radius_client_timer, radius,
510 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
511 HOSTAPD_LEVEL_DEBUG, "Next RADIUS client retransmit in"
512 " %ld seconds\n", (long int) (first - now.sec));
516 static void radius_client_list_add(struct radius_client_data *radius,
517 struct radius_msg *msg,
519 const u8 *shared_secret,
520 size_t shared_secret_len, const u8 *addr)
522 struct radius_msg_list *entry, *prev;
524 if (eloop_terminated()) {
525 /* No point in adding entries to retransmit queue since event
526 * loop has already been terminated. */
527 radius_msg_free(msg);
531 entry = os_zalloc(sizeof(*entry));
533 printf("Failed to add RADIUS packet into retransmit list\n");
534 radius_msg_free(msg);
539 os_memcpy(entry->addr, addr, ETH_ALEN);
541 entry->msg_type = msg_type;
542 entry->shared_secret = shared_secret;
543 entry->shared_secret_len = shared_secret_len;
544 os_get_time(&entry->last_attempt);
545 entry->first_try = entry->last_attempt.sec;
546 entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
548 entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
549 entry->next = radius->msgs;
550 radius->msgs = entry;
551 radius_client_update_timeout(radius);
553 if (radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
554 printf("Removing the oldest un-ACKed RADIUS packet due to "
555 "retransmit list limits.\n");
557 while (entry->next) {
563 radius_client_msg_free(entry);
570 static void radius_client_list_del(struct radius_client_data *radius,
571 RadiusType msg_type, const u8 *addr)
573 struct radius_msg_list *entry, *prev, *tmp;
578 entry = radius->msgs;
581 if (entry->msg_type == msg_type &&
582 os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
584 prev->next = entry->next;
586 radius->msgs = entry->next;
589 hostapd_logger(radius->ctx, addr,
590 HOSTAPD_MODULE_RADIUS,
592 "Removing matching RADIUS message");
593 radius_client_msg_free(tmp);
604 * radius_client_send - Send a RADIUS request
605 * @radius: RADIUS client context from radius_client_init()
606 * @msg: RADIUS message to be sent
607 * @msg_type: Message type (RADIUS_AUTH, RADIUS_ACCT, RADIUS_ACCT_INTERIM)
608 * @addr: MAC address of the device related to this message or %NULL
609 * Returns: 0 on success, -1 on failure
611 * This function is used to transmit a RADIUS authentication (RADIUS_AUTH) or
612 * accounting request (RADIUS_ACCT or RADIUS_ACCT_INTERIM). The only difference
613 * between accounting and interim accounting messages is that the interim
614 * message will override any pending interim accounting updates while a new
615 * accounting message does not remove any pending messages.
617 * The message is added on the retransmission queue and will be retransmitted
618 * automatically until a response is received or maximum number of retries
619 * (RADIUS_CLIENT_MAX_RETRIES) is reached.
621 * The related device MAC address can be used to identify pending messages that
622 * can be removed with radius_client_flush_auth() or with interim accounting
625 int radius_client_send(struct radius_client_data *radius,
626 struct radius_msg *msg, RadiusType msg_type,
629 struct hostapd_radius_servers *conf = radius->conf;
630 const u8 *shared_secret;
631 size_t shared_secret_len;
635 if (msg_type == RADIUS_ACCT_INTERIM) {
636 /* Remove any pending interim acct update for the same STA. */
637 radius_client_list_del(radius, msg_type, addr);
640 if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM) {
641 if (conf->acct_server == NULL) {
642 hostapd_logger(radius->ctx, NULL,
643 HOSTAPD_MODULE_RADIUS,
645 "No accounting server configured");
648 shared_secret = conf->acct_server->shared_secret;
649 shared_secret_len = conf->acct_server->shared_secret_len;
650 radius_msg_finish_acct(msg, shared_secret, shared_secret_len);
652 s = radius->acct_sock;
653 conf->acct_server->requests++;
655 if (conf->auth_server == NULL) {
656 hostapd_logger(radius->ctx, NULL,
657 HOSTAPD_MODULE_RADIUS,
659 "No authentication server configured");
662 shared_secret = conf->auth_server->shared_secret;
663 shared_secret_len = conf->auth_server->shared_secret_len;
664 radius_msg_finish(msg, shared_secret, shared_secret_len);
665 name = "authentication";
666 s = radius->auth_sock;
667 conf->auth_server->requests++;
670 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
671 HOSTAPD_LEVEL_DEBUG, "Sending RADIUS message to %s "
674 radius_msg_dump(msg);
676 res = send(s, msg->buf, msg->buf_used, 0);
678 radius_client_handle_send_error(radius, s, msg_type);
680 radius_client_list_add(radius, msg, msg_type, shared_secret,
681 shared_secret_len, addr);
687 static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
689 struct radius_client_data *radius = eloop_ctx;
690 struct hostapd_radius_servers *conf = radius->conf;
691 RadiusType msg_type = (RadiusType) sock_ctx;
693 unsigned char buf[3000];
694 struct radius_msg *msg;
695 struct radius_rx_handler *handlers;
696 size_t num_handlers, i;
697 struct radius_msg_list *req, *prev_req;
699 struct hostapd_radius_server *rconf;
700 int invalid_authenticator = 0;
702 if (msg_type == RADIUS_ACCT) {
703 handlers = radius->acct_handlers;
704 num_handlers = radius->num_acct_handlers;
705 rconf = conf->acct_server;
707 handlers = radius->auth_handlers;
708 num_handlers = radius->num_auth_handlers;
709 rconf = conf->auth_server;
712 len = recv(sock, buf, sizeof(buf), MSG_DONTWAIT);
714 perror("recv[RADIUS]");
717 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
718 HOSTAPD_LEVEL_DEBUG, "Received %d bytes from RADIUS "
720 if (len == sizeof(buf)) {
721 printf("Possibly too long UDP frame for our buffer - "
726 msg = radius_msg_parse(buf, len);
728 printf("Parsing incoming RADIUS frame failed\n");
729 rconf->malformed_responses++;
733 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
734 HOSTAPD_LEVEL_DEBUG, "Received RADIUS message");
736 radius_msg_dump(msg);
738 switch (msg->hdr->code) {
739 case RADIUS_CODE_ACCESS_ACCEPT:
740 rconf->access_accepts++;
742 case RADIUS_CODE_ACCESS_REJECT:
743 rconf->access_rejects++;
745 case RADIUS_CODE_ACCESS_CHALLENGE:
746 rconf->access_challenges++;
748 case RADIUS_CODE_ACCOUNTING_RESPONSE:
756 /* TODO: also match by src addr:port of the packet when using
757 * alternative RADIUS servers (?) */
758 if ((req->msg_type == msg_type ||
759 (req->msg_type == RADIUS_ACCT_INTERIM &&
760 msg_type == RADIUS_ACCT)) &&
761 req->msg->hdr->identifier == msg->hdr->identifier)
769 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
771 "No matching RADIUS request found (type=%d "
772 "id=%d) - dropping packet",
773 msg_type, msg->hdr->identifier);
778 roundtrip = (now.sec - req->last_attempt.sec) * 100 +
779 (now.usec - req->last_attempt.usec) / 10000;
780 hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
782 "Received RADIUS packet matched with a pending "
783 "request, round trip time %d.%02d sec",
784 roundtrip / 100, roundtrip % 100);
785 rconf->round_trip_time = roundtrip;
787 /* Remove ACKed RADIUS packet from retransmit list */
789 prev_req->next = req->next;
791 radius->msgs = req->next;
794 for (i = 0; i < num_handlers; i++) {
796 res = handlers[i].handler(msg, req->msg, req->shared_secret,
797 req->shared_secret_len,
800 case RADIUS_RX_PROCESSED:
801 radius_msg_free(msg);
803 case RADIUS_RX_QUEUED:
804 radius_client_msg_free(req);
806 case RADIUS_RX_INVALID_AUTHENTICATOR:
807 invalid_authenticator++;
809 case RADIUS_RX_UNKNOWN:
810 /* continue with next handler */
815 if (invalid_authenticator)
816 rconf->bad_authenticators++;
818 rconf->unknown_types++;
819 hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
820 HOSTAPD_LEVEL_DEBUG, "No RADIUS RX handler found "
821 "(type=%d code=%d id=%d)%s - dropping packet",
822 msg_type, msg->hdr->code, msg->hdr->identifier,
823 invalid_authenticator ? " [INVALID AUTHENTICATOR]" :
825 radius_client_msg_free(req);
828 radius_msg_free(msg);
833 * radius_client_get_id - Get an identifier for a new RADIUS message
834 * @radius: RADIUS client context from radius_client_init()
835 * Returns: Allocated identifier
837 * This function is used to fetch a unique (among pending requests) identifier
838 * for a new RADIUS message.
840 u8 radius_client_get_id(struct radius_client_data *radius)
842 struct radius_msg_list *entry, *prev, *_remove;
843 u8 id = radius->next_radius_identifier++;
845 /* remove entries with matching id from retransmit list to avoid
846 * using new reply from the RADIUS server with an old request */
847 entry = radius->msgs;
850 if (entry->msg->hdr->identifier == id) {
851 hostapd_logger(radius->ctx, entry->addr,
852 HOSTAPD_MODULE_RADIUS,
854 "Removing pending RADIUS message, "
855 "since its id (%d) is reused", id);
857 prev->next = entry->next;
859 radius->msgs = entry->next;
868 radius_client_msg_free(_remove);
876 * radius_client_flush - Flush all pending RADIUS client messages
877 * @radius: RADIUS client context from radius_client_init()
878 * @only_auth: Whether only authentication messages are removed
880 void radius_client_flush(struct radius_client_data *radius, int only_auth)
882 struct radius_msg_list *entry, *prev, *tmp;
888 entry = radius->msgs;
891 if (!only_auth || entry->msg_type == RADIUS_AUTH) {
893 prev->next = entry->next;
895 radius->msgs = entry->next;
899 radius_client_msg_free(tmp);
907 if (radius->msgs == NULL)
908 eloop_cancel_timeout(radius_client_timer, radius, NULL);
912 static void radius_client_update_acct_msgs(struct radius_client_data *radius,
913 const u8 *shared_secret,
914 size_t shared_secret_len)
916 struct radius_msg_list *entry;
921 for (entry = radius->msgs; entry; entry = entry->next) {
922 if (entry->msg_type == RADIUS_ACCT) {
923 entry->shared_secret = shared_secret;
924 entry->shared_secret_len = shared_secret_len;
925 radius_msg_finish_acct(entry->msg, shared_secret,
933 radius_change_server(struct radius_client_data *radius,
934 struct hostapd_radius_server *nserv,
935 struct hostapd_radius_server *oserv,
936 int sock, int sock6, int auth)
938 struct sockaddr_in serv, claddr;
940 struct sockaddr_in6 serv6, claddr6;
941 #endif /* CONFIG_IPV6 */
942 struct sockaddr *addr, *cl_addr;
943 socklen_t addrlen, claddrlen;
946 struct radius_msg_list *entry;
947 struct hostapd_radius_servers *conf = radius->conf;
949 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
952 auth ? "Authentication" : "Accounting",
953 hostapd_ip_txt(&nserv->addr, abuf, sizeof(abuf)),
956 if (!oserv || nserv->shared_secret_len != oserv->shared_secret_len ||
957 os_memcmp(nserv->shared_secret, oserv->shared_secret,
958 nserv->shared_secret_len) != 0) {
959 /* Pending RADIUS packets used different shared secret, so
960 * they need to be modified. Update accounting message
961 * authenticators here. Authentication messages are removed
962 * since they would require more changes and the new RADIUS
963 * server may not be prepared to receive them anyway due to
964 * missing state information. Client will likely retry
965 * authentication, so this should not be an issue. */
967 radius_client_flush(radius, 1);
969 radius_client_update_acct_msgs(
970 radius, nserv->shared_secret,
971 nserv->shared_secret_len);
975 /* Reset retry counters for the new server */
976 for (entry = radius->msgs; entry; entry = entry->next) {
977 if ((auth && entry->msg_type != RADIUS_AUTH) ||
978 (!auth && entry->msg_type != RADIUS_ACCT))
980 entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
982 entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
986 eloop_cancel_timeout(radius_client_timer, radius, NULL);
987 eloop_register_timeout(RADIUS_CLIENT_FIRST_WAIT, 0,
988 radius_client_timer, radius, NULL);
991 switch (nserv->addr.af) {
993 os_memset(&serv, 0, sizeof(serv));
994 serv.sin_family = AF_INET;
995 serv.sin_addr.s_addr = nserv->addr.u.v4.s_addr;
996 serv.sin_port = htons(nserv->port);
997 addr = (struct sockaddr *) &serv;
998 addrlen = sizeof(serv);
1003 os_memset(&serv6, 0, sizeof(serv6));
1004 serv6.sin6_family = AF_INET6;
1005 os_memcpy(&serv6.sin6_addr, &nserv->addr.u.v6,
1006 sizeof(struct in6_addr));
1007 serv6.sin6_port = htons(nserv->port);
1008 addr = (struct sockaddr *) &serv6;
1009 addrlen = sizeof(serv6);
1012 #endif /* CONFIG_IPV6 */
1017 if (conf->force_client_addr) {
1018 switch (conf->client_addr.af) {
1020 os_memset(&claddr, 0, sizeof(claddr));
1021 claddr.sin_family = AF_INET;
1022 claddr.sin_addr.s_addr = conf->client_addr.u.v4.s_addr;
1023 claddr.sin_port = htons(0);
1024 cl_addr = (struct sockaddr *) &claddr;
1025 claddrlen = sizeof(claddr);
1029 os_memset(&claddr6, 0, sizeof(claddr6));
1030 claddr6.sin6_family = AF_INET6;
1031 os_memcpy(&claddr6.sin6_addr, &conf->client_addr.u.v6,
1032 sizeof(struct in6_addr));
1033 claddr6.sin6_port = htons(0);
1034 cl_addr = (struct sockaddr *) &claddr6;
1035 claddrlen = sizeof(claddr6);
1037 #endif /* CONFIG_IPV6 */
1042 if (bind(sel_sock, cl_addr, claddrlen) < 0) {
1043 perror("bind[radius]");
1048 if (connect(sel_sock, addr, addrlen) < 0) {
1049 perror("connect[radius]");
1053 #ifndef CONFIG_NATIVE_WINDOWS
1054 switch (nserv->addr.af) {
1056 claddrlen = sizeof(claddr);
1057 getsockname(sel_sock, (struct sockaddr *) &claddr, &claddrlen);
1058 wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
1059 inet_ntoa(claddr.sin_addr), ntohs(claddr.sin_port));
1063 claddrlen = sizeof(claddr6);
1064 getsockname(sel_sock, (struct sockaddr *) &claddr6,
1066 wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
1067 inet_ntop(AF_INET6, &claddr6.sin6_addr,
1068 abuf, sizeof(abuf)),
1069 ntohs(claddr6.sin6_port));
1072 #endif /* CONFIG_IPV6 */
1074 #endif /* CONFIG_NATIVE_WINDOWS */
1077 radius->auth_sock = sel_sock;
1079 radius->acct_sock = sel_sock;
1085 static void radius_retry_primary_timer(void *eloop_ctx, void *timeout_ctx)
1087 struct radius_client_data *radius = eloop_ctx;
1088 struct hostapd_radius_servers *conf = radius->conf;
1089 struct hostapd_radius_server *oserv;
1091 if (radius->auth_sock >= 0 && conf->auth_servers &&
1092 conf->auth_server != conf->auth_servers) {
1093 oserv = conf->auth_server;
1094 conf->auth_server = conf->auth_servers;
1095 radius_change_server(radius, conf->auth_server, oserv,
1096 radius->auth_serv_sock,
1097 radius->auth_serv_sock6, 1);
1100 if (radius->acct_sock >= 0 && conf->acct_servers &&
1101 conf->acct_server != conf->acct_servers) {
1102 oserv = conf->acct_server;
1103 conf->acct_server = conf->acct_servers;
1104 radius_change_server(radius, conf->acct_server, oserv,
1105 radius->acct_serv_sock,
1106 radius->acct_serv_sock6, 0);
1109 if (conf->retry_primary_interval)
1110 eloop_register_timeout(conf->retry_primary_interval, 0,
1111 radius_retry_primary_timer, radius,
1116 static int radius_client_disable_pmtu_discovery(int s)
1119 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
1120 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
1121 int action = IP_PMTUDISC_DONT;
1122 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
1125 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
1126 "%s", strerror(errno));
1132 static int radius_client_init_auth(struct radius_client_data *radius)
1134 struct hostapd_radius_servers *conf = radius->conf;
1137 radius->auth_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
1138 if (radius->auth_serv_sock < 0)
1139 perror("socket[PF_INET,SOCK_DGRAM]");
1141 radius_client_disable_pmtu_discovery(radius->auth_serv_sock);
1146 radius->auth_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
1147 if (radius->auth_serv_sock6 < 0)
1148 perror("socket[PF_INET6,SOCK_DGRAM]");
1151 #endif /* CONFIG_IPV6 */
1156 radius_change_server(radius, conf->auth_server, NULL,
1157 radius->auth_serv_sock, radius->auth_serv_sock6,
1160 if (radius->auth_serv_sock >= 0 &&
1161 eloop_register_read_sock(radius->auth_serv_sock,
1162 radius_client_receive, radius,
1163 (void *) RADIUS_AUTH)) {
1164 printf("Could not register read socket for authentication "
1170 if (radius->auth_serv_sock6 >= 0 &&
1171 eloop_register_read_sock(radius->auth_serv_sock6,
1172 radius_client_receive, radius,
1173 (void *) RADIUS_AUTH)) {
1174 printf("Could not register read socket for authentication "
1178 #endif /* CONFIG_IPV6 */
1184 static int radius_client_init_acct(struct radius_client_data *radius)
1186 struct hostapd_radius_servers *conf = radius->conf;
1189 radius->acct_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
1190 if (radius->acct_serv_sock < 0)
1191 perror("socket[PF_INET,SOCK_DGRAM]");
1193 radius_client_disable_pmtu_discovery(radius->acct_serv_sock);
1198 radius->acct_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
1199 if (radius->acct_serv_sock6 < 0)
1200 perror("socket[PF_INET6,SOCK_DGRAM]");
1203 #endif /* CONFIG_IPV6 */
1208 radius_change_server(radius, conf->acct_server, NULL,
1209 radius->acct_serv_sock, radius->acct_serv_sock6,
1212 if (radius->acct_serv_sock >= 0 &&
1213 eloop_register_read_sock(radius->acct_serv_sock,
1214 radius_client_receive, radius,
1215 (void *) RADIUS_ACCT)) {
1216 printf("Could not register read socket for accounting "
1222 if (radius->acct_serv_sock6 >= 0 &&
1223 eloop_register_read_sock(radius->acct_serv_sock6,
1224 radius_client_receive, radius,
1225 (void *) RADIUS_ACCT)) {
1226 printf("Could not register read socket for accounting "
1230 #endif /* CONFIG_IPV6 */
1237 * radius_client_init - Initialize RADIUS client
1238 * @ctx: Callback context to be used in hostapd_logger() calls
1239 * @conf: RADIUS client configuration (RADIUS servers)
1240 * Returns: Pointer to private RADIUS client context or %NULL on failure
1242 * The caller is responsible for keeping the configuration data available for
1243 * the lifetime of the RADIUS client, i.e., until radius_client_deinit() is
1244 * called for the returned context pointer.
1246 struct radius_client_data *
1247 radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
1249 struct radius_client_data *radius;
1251 radius = os_zalloc(sizeof(struct radius_client_data));
1256 radius->conf = conf;
1257 radius->auth_serv_sock = radius->acct_serv_sock =
1258 radius->auth_serv_sock6 = radius->acct_serv_sock6 =
1259 radius->auth_sock = radius->acct_sock = -1;
1261 if (conf->auth_server && radius_client_init_auth(radius)) {
1262 radius_client_deinit(radius);
1266 if (conf->acct_server && radius_client_init_acct(radius)) {
1267 radius_client_deinit(radius);
1271 if (conf->retry_primary_interval)
1272 eloop_register_timeout(conf->retry_primary_interval, 0,
1273 radius_retry_primary_timer, radius,
1281 * radius_client_deinit - Deinitialize RADIUS client
1282 * @radius: RADIUS client context from radius_client_init()
1284 void radius_client_deinit(struct radius_client_data *radius)
1289 if (radius->auth_serv_sock >= 0)
1290 eloop_unregister_read_sock(radius->auth_serv_sock);
1291 if (radius->acct_serv_sock >= 0)
1292 eloop_unregister_read_sock(radius->acct_serv_sock);
1294 eloop_cancel_timeout(radius_retry_primary_timer, radius, NULL);
1296 radius_client_flush(radius, 0);
1297 os_free(radius->auth_handlers);
1298 os_free(radius->acct_handlers);
1304 * radius_client_flush_auth - Flush pending RADIUS messages for an address
1305 * @radius: RADIUS client context from radius_client_init()
1306 * @addr: MAC address of the related device
1308 * This function can be used to remove pending RADIUS authentication messages
1309 * that are related to a specific device. The addr parameter is matched with
1310 * the one used in radius_client_send() call that was used to transmit the
1311 * authentication request.
1313 void radius_client_flush_auth(struct radius_client_data *radius,
1316 struct radius_msg_list *entry, *prev, *tmp;
1319 entry = radius->msgs;
1321 if (entry->msg_type == RADIUS_AUTH &&
1322 os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
1323 hostapd_logger(radius->ctx, addr,
1324 HOSTAPD_MODULE_RADIUS,
1325 HOSTAPD_LEVEL_DEBUG,
1326 "Removing pending RADIUS authentication"
1327 " message for removed client");
1330 prev->next = entry->next;
1332 radius->msgs = entry->next;
1335 entry = entry->next;
1336 radius_client_msg_free(tmp);
1342 entry = entry->next;
1347 static int radius_client_dump_auth_server(char *buf, size_t buflen,
1348 struct hostapd_radius_server *serv,
1349 struct radius_client_data *cli)
1352 struct radius_msg_list *msg;
1356 for (msg = cli->msgs; msg; msg = msg->next) {
1357 if (msg->msg_type == RADIUS_AUTH)
1362 return os_snprintf(buf, buflen,
1363 "radiusAuthServerIndex=%d\n"
1364 "radiusAuthServerAddress=%s\n"
1365 "radiusAuthClientServerPortNumber=%d\n"
1366 "radiusAuthClientRoundTripTime=%d\n"
1367 "radiusAuthClientAccessRequests=%u\n"
1368 "radiusAuthClientAccessRetransmissions=%u\n"
1369 "radiusAuthClientAccessAccepts=%u\n"
1370 "radiusAuthClientAccessRejects=%u\n"
1371 "radiusAuthClientAccessChallenges=%u\n"
1372 "radiusAuthClientMalformedAccessResponses=%u\n"
1373 "radiusAuthClientBadAuthenticators=%u\n"
1374 "radiusAuthClientPendingRequests=%u\n"
1375 "radiusAuthClientTimeouts=%u\n"
1376 "radiusAuthClientUnknownTypes=%u\n"
1377 "radiusAuthClientPacketsDropped=%u\n",
1379 hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1381 serv->round_trip_time,
1383 serv->retransmissions,
1384 serv->access_accepts,
1385 serv->access_rejects,
1386 serv->access_challenges,
1387 serv->malformed_responses,
1388 serv->bad_authenticators,
1391 serv->unknown_types,
1392 serv->packets_dropped);
1396 static int radius_client_dump_acct_server(char *buf, size_t buflen,
1397 struct hostapd_radius_server *serv,
1398 struct radius_client_data *cli)
1401 struct radius_msg_list *msg;
1405 for (msg = cli->msgs; msg; msg = msg->next) {
1406 if (msg->msg_type == RADIUS_ACCT ||
1407 msg->msg_type == RADIUS_ACCT_INTERIM)
1412 return os_snprintf(buf, buflen,
1413 "radiusAccServerIndex=%d\n"
1414 "radiusAccServerAddress=%s\n"
1415 "radiusAccClientServerPortNumber=%d\n"
1416 "radiusAccClientRoundTripTime=%d\n"
1417 "radiusAccClientRequests=%u\n"
1418 "radiusAccClientRetransmissions=%u\n"
1419 "radiusAccClientResponses=%u\n"
1420 "radiusAccClientMalformedResponses=%u\n"
1421 "radiusAccClientBadAuthenticators=%u\n"
1422 "radiusAccClientPendingRequests=%u\n"
1423 "radiusAccClientTimeouts=%u\n"
1424 "radiusAccClientUnknownTypes=%u\n"
1425 "radiusAccClientPacketsDropped=%u\n",
1427 hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1429 serv->round_trip_time,
1431 serv->retransmissions,
1433 serv->malformed_responses,
1434 serv->bad_authenticators,
1437 serv->unknown_types,
1438 serv->packets_dropped);
1443 * radius_client_get_mib - Get RADIUS client MIB information
1444 * @radius: RADIUS client context from radius_client_init()
1445 * @buf: Buffer for returning MIB data in text format
1446 * @buflen: Maximum buf length in octets
1447 * Returns: Number of octets written into the buffer
1449 int radius_client_get_mib(struct radius_client_data *radius, char *buf,
1452 struct hostapd_radius_servers *conf = radius->conf;
1454 struct hostapd_radius_server *serv;
1457 if (conf->auth_servers) {
1458 for (i = 0; i < conf->num_auth_servers; i++) {
1459 serv = &conf->auth_servers[i];
1460 count += radius_client_dump_auth_server(
1461 buf + count, buflen - count, serv,
1462 serv == conf->auth_server ?
1467 if (conf->acct_servers) {
1468 for (i = 0; i < conf->num_acct_servers; i++) {
1469 serv = &conf->acct_servers[i];
1470 count += radius_client_dump_acct_server(
1471 buf + count, buflen - count, serv,
1472 serv == conf->acct_server ?