2 * hostapd / RADIUS client
3 * Copyright (c) 2002-2005, 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) */
23 #define RADIUS_CLIENT_FIRST_WAIT 3 /* seconds */
24 #define RADIUS_CLIENT_MAX_WAIT 120 /* seconds */
25 #define RADIUS_CLIENT_MAX_RETRIES 10 /* maximum number of retransmit attempts
26 * before entry is removed from retransmit
28 #define RADIUS_CLIENT_MAX_ENTRIES 30 /* maximum number of entries in retransmit
29 * list (oldest will be removed, if this
30 * limit is exceeded) */
31 #define RADIUS_CLIENT_NUM_FAILOVER 4 /* try to change RADIUS server after this
32 * many failed retry attempts */
35 struct radius_rx_handler {
36 RadiusRxResult (*handler)(struct radius_msg *msg,
37 struct radius_msg *req,
38 const u8 *shared_secret,
39 size_t shared_secret_len,
45 /* RADIUS message retransmit list */
46 struct radius_msg_list {
47 u8 addr[ETH_ALEN]; /* STA/client address; used to find RADIUS messages
48 * for the same STA. */
49 struct radius_msg *msg;
55 struct os_time last_attempt;
58 size_t shared_secret_len;
60 /* TODO: server config with failover to backup server(s) */
62 struct radius_msg_list *next;
66 struct radius_client_data {
68 struct hostapd_radius_servers *conf;
70 int auth_serv_sock; /* socket for authentication RADIUS messages */
71 int acct_serv_sock; /* socket for accounting RADIUS messages */
74 int auth_sock; /* currently used socket */
75 int acct_sock; /* currently used socket */
77 struct radius_rx_handler *auth_handlers;
78 size_t num_auth_handlers;
79 struct radius_rx_handler *acct_handlers;
80 size_t num_acct_handlers;
82 struct radius_msg_list *msgs;
85 u8 next_radius_identifier;
90 radius_change_server(struct radius_client_data *radius,
91 struct hostapd_radius_server *nserv,
92 struct hostapd_radius_server *oserv,
93 int sock, int sock6, int auth);
94 static int radius_client_init_acct(struct radius_client_data *radius);
95 static int radius_client_init_auth(struct radius_client_data *radius);
98 static void radius_client_msg_free(struct radius_msg_list *req)
100 radius_msg_free(req->msg);
106 int radius_client_register(struct radius_client_data *radius,
108 RadiusRxResult (*handler)(struct radius_msg *msg,
109 struct radius_msg *req,
110 const u8 *shared_secret,
111 size_t shared_secret_len,
115 struct radius_rx_handler **handlers, *newh;
118 if (msg_type == RADIUS_ACCT) {
119 handlers = &radius->acct_handlers;
120 num = &radius->num_acct_handlers;
122 handlers = &radius->auth_handlers;
123 num = &radius->num_auth_handlers;
126 newh = os_realloc(*handlers,
127 (*num + 1) * sizeof(struct radius_rx_handler));
131 newh[*num].handler = handler;
132 newh[*num].data = data;
140 static void radius_client_handle_send_error(struct radius_client_data *radius,
141 int s, RadiusType msg_type)
143 #ifndef CONFIG_NATIVE_WINDOWS
145 perror("send[RADIUS]");
146 if (_errno == ENOTCONN || _errno == EDESTADDRREQ || _errno == EINVAL ||
148 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
150 "Send failed - maybe interface status changed -"
151 " try to connect again");
152 eloop_unregister_read_sock(s);
154 if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM)
155 radius_client_init_acct(radius);
157 radius_client_init_auth(radius);
159 #endif /* CONFIG_NATIVE_WINDOWS */
163 static int radius_client_retransmit(struct radius_client_data *radius,
164 struct radius_msg_list *entry,
167 struct hostapd_radius_servers *conf = radius->conf;
170 if (entry->msg_type == RADIUS_ACCT ||
171 entry->msg_type == RADIUS_ACCT_INTERIM) {
172 s = radius->acct_sock;
173 if (entry->attempts == 0)
174 conf->acct_server->requests++;
176 conf->acct_server->timeouts++;
177 conf->acct_server->retransmissions++;
180 s = radius->auth_sock;
181 if (entry->attempts == 0)
182 conf->auth_server->requests++;
184 conf->auth_server->timeouts++;
185 conf->auth_server->retransmissions++;
189 /* retransmit; remove entry if too many attempts */
191 hostapd_logger(radius->ctx, entry->addr, HOSTAPD_MODULE_RADIUS,
192 HOSTAPD_LEVEL_DEBUG, "Resending RADIUS message (id=%d)",
193 entry->msg->hdr->identifier);
195 os_get_time(&entry->last_attempt);
196 if (send(s, entry->msg->buf, entry->msg->buf_used, 0) < 0)
197 radius_client_handle_send_error(radius, s, entry->msg_type);
199 entry->next_try = now + entry->next_wait;
200 entry->next_wait *= 2;
201 if (entry->next_wait > RADIUS_CLIENT_MAX_WAIT)
202 entry->next_wait = RADIUS_CLIENT_MAX_WAIT;
203 if (entry->attempts >= RADIUS_CLIENT_MAX_RETRIES) {
204 printf("Removing un-ACKed RADIUS message due to too many "
205 "failed retransmit attempts\n");
213 static void radius_client_timer(void *eloop_ctx, void *timeout_ctx)
215 struct radius_client_data *radius = eloop_ctx;
216 struct hostapd_radius_servers *conf = radius->conf;
219 struct radius_msg_list *entry, *prev, *tmp;
220 int auth_failover = 0, acct_failover = 0;
223 entry = radius->msgs;
232 if (now.sec >= entry->next_try &&
233 radius_client_retransmit(radius, entry, now.sec)) {
235 prev->next = entry->next;
237 radius->msgs = entry->next;
241 radius_client_msg_free(tmp);
246 if (entry->attempts > RADIUS_CLIENT_NUM_FAILOVER) {
247 if (entry->msg_type == RADIUS_ACCT ||
248 entry->msg_type == RADIUS_ACCT_INTERIM)
254 if (first == 0 || entry->next_try < first)
255 first = entry->next_try;
264 eloop_register_timeout(first - now.sec, 0,
265 radius_client_timer, radius, NULL);
266 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
267 HOSTAPD_LEVEL_DEBUG, "Next RADIUS client "
268 "retransmit in %ld seconds",
269 (long int) (first - now.sec));
272 if (auth_failover && conf->num_auth_servers > 1) {
273 struct hostapd_radius_server *next, *old;
274 old = conf->auth_server;
275 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
276 HOSTAPD_LEVEL_NOTICE,
277 "No response from Authentication server "
279 hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
282 for (entry = radius->msgs; entry; entry = entry->next) {
283 if (entry->msg_type == RADIUS_AUTH)
288 if (next > &(conf->auth_servers[conf->num_auth_servers - 1]))
289 next = conf->auth_servers;
290 conf->auth_server = next;
291 radius_change_server(radius, next, old,
292 radius->auth_serv_sock,
293 radius->auth_serv_sock6, 1);
296 if (acct_failover && conf->num_acct_servers > 1) {
297 struct hostapd_radius_server *next, *old;
298 old = conf->acct_server;
299 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
300 HOSTAPD_LEVEL_NOTICE,
301 "No response from Accounting server "
303 hostapd_ip_txt(&old->addr, abuf, sizeof(abuf)),
306 for (entry = radius->msgs; entry; entry = entry->next) {
307 if (entry->msg_type == RADIUS_ACCT ||
308 entry->msg_type == RADIUS_ACCT_INTERIM)
313 if (next > &conf->acct_servers[conf->num_acct_servers - 1])
314 next = conf->acct_servers;
315 conf->acct_server = next;
316 radius_change_server(radius, next, old,
317 radius->acct_serv_sock,
318 radius->acct_serv_sock6, 0);
323 static void radius_client_update_timeout(struct radius_client_data *radius)
327 struct radius_msg_list *entry;
329 eloop_cancel_timeout(radius_client_timer, radius, NULL);
331 if (radius->msgs == NULL) {
336 for (entry = radius->msgs; entry; entry = entry->next) {
337 if (first == 0 || entry->next_try < first)
338 first = entry->next_try;
344 eloop_register_timeout(first - now.sec, 0, radius_client_timer, radius,
346 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
347 HOSTAPD_LEVEL_DEBUG, "Next RADIUS client retransmit in"
348 " %ld seconds\n", (long int) (first - now.sec));
352 static void radius_client_list_add(struct radius_client_data *radius,
353 struct radius_msg *msg,
354 RadiusType msg_type, u8 *shared_secret,
355 size_t shared_secret_len, const u8 *addr)
357 struct radius_msg_list *entry, *prev;
359 if (eloop_terminated()) {
360 /* No point in adding entries to retransmit queue since event
361 * loop has already been terminated. */
362 radius_msg_free(msg);
367 entry = os_zalloc(sizeof(*entry));
369 printf("Failed to add RADIUS packet into retransmit list\n");
370 radius_msg_free(msg);
376 os_memcpy(entry->addr, addr, ETH_ALEN);
378 entry->msg_type = msg_type;
379 entry->shared_secret = shared_secret;
380 entry->shared_secret_len = shared_secret_len;
381 os_get_time(&entry->last_attempt);
382 entry->first_try = entry->last_attempt.sec;
383 entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
385 entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
386 entry->next = radius->msgs;
387 radius->msgs = entry;
388 radius_client_update_timeout(radius);
390 if (radius->num_msgs >= RADIUS_CLIENT_MAX_ENTRIES) {
391 printf("Removing the oldest un-ACKed RADIUS packet due to "
392 "retransmit list limits.\n");
394 while (entry->next) {
400 radius_client_msg_free(entry);
407 static void radius_client_list_del(struct radius_client_data *radius,
408 RadiusType msg_type, const u8 *addr)
410 struct radius_msg_list *entry, *prev, *tmp;
415 entry = radius->msgs;
418 if (entry->msg_type == msg_type &&
419 os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
421 prev->next = entry->next;
423 radius->msgs = entry->next;
426 hostapd_logger(radius->ctx, addr,
427 HOSTAPD_MODULE_RADIUS,
429 "Removing matching RADIUS message");
430 radius_client_msg_free(tmp);
440 int radius_client_send(struct radius_client_data *radius,
441 struct radius_msg *msg, RadiusType msg_type,
444 struct hostapd_radius_servers *conf = radius->conf;
446 size_t shared_secret_len;
450 if (msg_type == RADIUS_ACCT_INTERIM) {
451 /* Remove any pending interim acct update for the same STA. */
452 radius_client_list_del(radius, msg_type, addr);
455 if (msg_type == RADIUS_ACCT || msg_type == RADIUS_ACCT_INTERIM) {
456 if (conf->acct_server == NULL) {
457 hostapd_logger(radius->ctx, NULL,
458 HOSTAPD_MODULE_RADIUS,
460 "No accounting server configured");
463 shared_secret = conf->acct_server->shared_secret;
464 shared_secret_len = conf->acct_server->shared_secret_len;
465 radius_msg_finish_acct(msg, shared_secret, shared_secret_len);
467 s = radius->acct_sock;
468 conf->acct_server->requests++;
470 if (conf->auth_server == NULL) {
471 hostapd_logger(radius->ctx, NULL,
472 HOSTAPD_MODULE_RADIUS,
474 "No authentication server configured");
477 shared_secret = conf->auth_server->shared_secret;
478 shared_secret_len = conf->auth_server->shared_secret_len;
479 radius_msg_finish(msg, shared_secret, shared_secret_len);
480 name = "authentication";
481 s = radius->auth_sock;
482 conf->auth_server->requests++;
485 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
486 HOSTAPD_LEVEL_DEBUG, "Sending RADIUS message to %s "
489 radius_msg_dump(msg);
491 res = send(s, msg->buf, msg->buf_used, 0);
493 radius_client_handle_send_error(radius, s, msg_type);
495 radius_client_list_add(radius, msg, msg_type, shared_secret,
496 shared_secret_len, addr);
502 static void radius_client_receive(int sock, void *eloop_ctx, void *sock_ctx)
504 struct radius_client_data *radius = eloop_ctx;
505 struct hostapd_radius_servers *conf = radius->conf;
506 RadiusType msg_type = (RadiusType) sock_ctx;
508 unsigned char buf[3000];
509 struct radius_msg *msg;
510 struct radius_rx_handler *handlers;
511 size_t num_handlers, i;
512 struct radius_msg_list *req, *prev_req;
514 struct hostapd_radius_server *rconf;
515 int invalid_authenticator = 0;
517 if (msg_type == RADIUS_ACCT) {
518 handlers = radius->acct_handlers;
519 num_handlers = radius->num_acct_handlers;
520 rconf = conf->acct_server;
522 handlers = radius->auth_handlers;
523 num_handlers = radius->num_auth_handlers;
524 rconf = conf->auth_server;
527 len = recv(sock, buf, sizeof(buf), MSG_DONTWAIT);
529 perror("recv[RADIUS]");
532 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
533 HOSTAPD_LEVEL_DEBUG, "Received %d bytes from RADIUS "
535 if (len == sizeof(buf)) {
536 printf("Possibly too long UDP frame for our buffer - "
541 msg = radius_msg_parse(buf, len);
543 printf("Parsing incoming RADIUS frame failed\n");
544 rconf->malformed_responses++;
548 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
549 HOSTAPD_LEVEL_DEBUG, "Received RADIUS message");
551 radius_msg_dump(msg);
553 switch (msg->hdr->code) {
554 case RADIUS_CODE_ACCESS_ACCEPT:
555 rconf->access_accepts++;
557 case RADIUS_CODE_ACCESS_REJECT:
558 rconf->access_rejects++;
560 case RADIUS_CODE_ACCESS_CHALLENGE:
561 rconf->access_challenges++;
563 case RADIUS_CODE_ACCOUNTING_RESPONSE:
571 /* TODO: also match by src addr:port of the packet when using
572 * alternative RADIUS servers (?) */
573 if ((req->msg_type == msg_type ||
574 (req->msg_type == RADIUS_ACCT_INTERIM &&
575 msg_type == RADIUS_ACCT)) &&
576 req->msg->hdr->identifier == msg->hdr->identifier)
584 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
586 "No matching RADIUS request found (type=%d "
587 "id=%d) - dropping packet",
588 msg_type, msg->hdr->identifier);
593 roundtrip = (now.sec - req->last_attempt.sec) * 100 +
594 (now.usec - req->last_attempt.usec) / 10000;
595 hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
597 "Received RADIUS packet matched with a pending "
598 "request, round trip time %d.%02d sec",
599 roundtrip / 100, roundtrip % 100);
600 rconf->round_trip_time = roundtrip;
602 /* Remove ACKed RADIUS packet from retransmit list */
604 prev_req->next = req->next;
606 radius->msgs = req->next;
609 for (i = 0; i < num_handlers; i++) {
611 res = handlers[i].handler(msg, req->msg, req->shared_secret,
612 req->shared_secret_len,
615 case RADIUS_RX_PROCESSED:
616 radius_msg_free(msg);
619 case RADIUS_RX_QUEUED:
620 radius_client_msg_free(req);
622 case RADIUS_RX_INVALID_AUTHENTICATOR:
623 invalid_authenticator++;
625 case RADIUS_RX_UNKNOWN:
626 /* continue with next handler */
631 if (invalid_authenticator)
632 rconf->bad_authenticators++;
634 rconf->unknown_types++;
635 hostapd_logger(radius->ctx, req->addr, HOSTAPD_MODULE_RADIUS,
636 HOSTAPD_LEVEL_DEBUG, "No RADIUS RX handler found "
637 "(type=%d code=%d id=%d)%s - dropping packet",
638 msg_type, msg->hdr->code, msg->hdr->identifier,
639 invalid_authenticator ? " [INVALID AUTHENTICATOR]" :
641 radius_client_msg_free(req);
644 radius_msg_free(msg);
649 u8 radius_client_get_id(struct radius_client_data *radius)
651 struct radius_msg_list *entry, *prev, *_remove;
652 u8 id = radius->next_radius_identifier++;
654 /* remove entries with matching id from retransmit list to avoid
655 * using new reply from the RADIUS server with an old request */
656 entry = radius->msgs;
659 if (entry->msg->hdr->identifier == id) {
660 hostapd_logger(radius->ctx, entry->addr,
661 HOSTAPD_MODULE_RADIUS,
663 "Removing pending RADIUS message, "
664 "since its id (%d) is reused", id);
666 prev->next = entry->next;
668 radius->msgs = entry->next;
677 radius_client_msg_free(_remove);
684 void radius_client_flush(struct radius_client_data *radius, int only_auth)
686 struct radius_msg_list *entry, *prev, *tmp;
692 entry = radius->msgs;
695 if (!only_auth || entry->msg_type == RADIUS_AUTH) {
697 prev->next = entry->next;
699 radius->msgs = entry->next;
703 radius_client_msg_free(tmp);
711 if (radius->msgs == NULL)
712 eloop_cancel_timeout(radius_client_timer, radius, NULL);
716 static void radius_client_update_acct_msgs(struct radius_client_data *radius,
718 size_t shared_secret_len)
720 struct radius_msg_list *entry;
725 for (entry = radius->msgs; entry; entry = entry->next) {
726 if (entry->msg_type == RADIUS_ACCT) {
727 entry->shared_secret = shared_secret;
728 entry->shared_secret_len = shared_secret_len;
729 radius_msg_finish_acct(entry->msg, shared_secret,
737 radius_change_server(struct radius_client_data *radius,
738 struct hostapd_radius_server *nserv,
739 struct hostapd_radius_server *oserv,
740 int sock, int sock6, int auth)
742 struct sockaddr_in serv, claddr;
744 struct sockaddr_in6 serv6, claddr6;
745 #endif /* CONFIG_IPV6 */
746 struct sockaddr *addr, *cl_addr;
747 socklen_t addrlen, claddrlen;
750 struct radius_msg_list *entry;
751 struct hostapd_radius_servers *conf = radius->conf;
753 hostapd_logger(radius->ctx, NULL, HOSTAPD_MODULE_RADIUS,
756 auth ? "Authentication" : "Accounting",
757 hostapd_ip_txt(&nserv->addr, abuf, sizeof(abuf)),
760 if (!oserv || nserv->shared_secret_len != oserv->shared_secret_len ||
761 os_memcmp(nserv->shared_secret, oserv->shared_secret,
762 nserv->shared_secret_len) != 0) {
763 /* Pending RADIUS packets used different shared secret, so
764 * they need to be modified. Update accounting message
765 * authenticators here. Authentication messages are removed
766 * since they would require more changes and the new RADIUS
767 * server may not be prepared to receive them anyway due to
768 * missing state information. Client will likely retry
769 * authentication, so this should not be an issue. */
771 radius_client_flush(radius, 1);
773 radius_client_update_acct_msgs(
774 radius, nserv->shared_secret,
775 nserv->shared_secret_len);
779 /* Reset retry counters for the new server */
780 for (entry = radius->msgs; entry; entry = entry->next) {
781 if ((auth && entry->msg_type != RADIUS_AUTH) ||
782 (!auth && entry->msg_type != RADIUS_ACCT))
784 entry->next_try = entry->first_try + RADIUS_CLIENT_FIRST_WAIT;
786 entry->next_wait = RADIUS_CLIENT_FIRST_WAIT * 2;
790 eloop_cancel_timeout(radius_client_timer, radius, NULL);
791 eloop_register_timeout(RADIUS_CLIENT_FIRST_WAIT, 0,
792 radius_client_timer, radius, NULL);
795 switch (nserv->addr.af) {
797 os_memset(&serv, 0, sizeof(serv));
798 serv.sin_family = AF_INET;
799 serv.sin_addr.s_addr = nserv->addr.u.v4.s_addr;
800 serv.sin_port = htons(nserv->port);
801 addr = (struct sockaddr *) &serv;
802 addrlen = sizeof(serv);
807 os_memset(&serv6, 0, sizeof(serv6));
808 serv6.sin6_family = AF_INET6;
809 os_memcpy(&serv6.sin6_addr, &nserv->addr.u.v6,
810 sizeof(struct in6_addr));
811 serv6.sin6_port = htons(nserv->port);
812 addr = (struct sockaddr *) &serv6;
813 addrlen = sizeof(serv6);
816 #endif /* CONFIG_IPV6 */
821 if (conf->force_client_addr) {
822 switch (conf->client_addr.af) {
824 os_memset(&claddr, 0, sizeof(claddr));
825 claddr.sin_family = AF_INET;
826 claddr.sin_addr.s_addr = conf->client_addr.u.v4.s_addr;
827 claddr.sin_port = htons(0);
828 cl_addr = (struct sockaddr *) &claddr;
829 claddrlen = sizeof(claddr);
833 os_memset(&claddr6, 0, sizeof(claddr6));
834 claddr6.sin6_family = AF_INET6;
835 os_memcpy(&claddr6.sin6_addr, &conf->client_addr.u.v6,
836 sizeof(struct in6_addr));
837 claddr6.sin6_port = htons(0);
838 cl_addr = (struct sockaddr *) &claddr6;
839 claddrlen = sizeof(claddr6);
841 #endif /* CONFIG_IPV6 */
846 if (bind(sel_sock, cl_addr, claddrlen) < 0) {
847 perror("bind[radius]");
852 if (connect(sel_sock, addr, addrlen) < 0) {
853 perror("connect[radius]");
857 #ifndef CONFIG_NATIVE_WINDOWS
858 switch (nserv->addr.af) {
860 claddrlen = sizeof(claddr);
861 getsockname(sel_sock, (struct sockaddr *) &claddr, &claddrlen);
862 wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
863 inet_ntoa(claddr.sin_addr), ntohs(claddr.sin_port));
867 claddrlen = sizeof(claddr6);
868 getsockname(sel_sock, (struct sockaddr *) &claddr6,
870 wpa_printf(MSG_DEBUG, "RADIUS local address: %s:%u",
871 inet_ntop(AF_INET6, &claddr6.sin6_addr,
873 ntohs(claddr6.sin6_port));
876 #endif /* CONFIG_IPV6 */
878 #endif /* CONFIG_NATIVE_WINDOWS */
881 radius->auth_sock = sel_sock;
883 radius->acct_sock = sel_sock;
889 static void radius_retry_primary_timer(void *eloop_ctx, void *timeout_ctx)
891 struct radius_client_data *radius = eloop_ctx;
892 struct hostapd_radius_servers *conf = radius->conf;
893 struct hostapd_radius_server *oserv;
895 if (radius->auth_sock >= 0 && conf->auth_servers &&
896 conf->auth_server != conf->auth_servers) {
897 oserv = conf->auth_server;
898 conf->auth_server = conf->auth_servers;
899 radius_change_server(radius, conf->auth_server, oserv,
900 radius->auth_serv_sock,
901 radius->auth_serv_sock6, 1);
904 if (radius->acct_sock >= 0 && conf->acct_servers &&
905 conf->acct_server != conf->acct_servers) {
906 oserv = conf->acct_server;
907 conf->acct_server = conf->acct_servers;
908 radius_change_server(radius, conf->acct_server, oserv,
909 radius->acct_serv_sock,
910 radius->acct_serv_sock6, 0);
913 if (conf->retry_primary_interval)
914 eloop_register_timeout(conf->retry_primary_interval, 0,
915 radius_retry_primary_timer, radius,
920 static int radius_client_init_auth(struct radius_client_data *radius)
922 struct hostapd_radius_servers *conf = radius->conf;
925 radius->auth_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
926 if (radius->auth_serv_sock < 0)
927 perror("socket[PF_INET,SOCK_DGRAM]");
932 radius->auth_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
933 if (radius->auth_serv_sock6 < 0)
934 perror("socket[PF_INET6,SOCK_DGRAM]");
937 #endif /* CONFIG_IPV6 */
942 radius_change_server(radius, conf->auth_server, NULL,
943 radius->auth_serv_sock, radius->auth_serv_sock6,
946 if (radius->auth_serv_sock >= 0 &&
947 eloop_register_read_sock(radius->auth_serv_sock,
948 radius_client_receive, radius,
949 (void *) RADIUS_AUTH)) {
950 printf("Could not register read socket for authentication "
956 if (radius->auth_serv_sock6 >= 0 &&
957 eloop_register_read_sock(radius->auth_serv_sock6,
958 radius_client_receive, radius,
959 (void *) RADIUS_AUTH)) {
960 printf("Could not register read socket for authentication "
964 #endif /* CONFIG_IPV6 */
970 static int radius_client_init_acct(struct radius_client_data *radius)
972 struct hostapd_radius_servers *conf = radius->conf;
975 radius->acct_serv_sock = socket(PF_INET, SOCK_DGRAM, 0);
976 if (radius->acct_serv_sock < 0)
977 perror("socket[PF_INET,SOCK_DGRAM]");
982 radius->acct_serv_sock6 = socket(PF_INET6, SOCK_DGRAM, 0);
983 if (radius->acct_serv_sock6 < 0)
984 perror("socket[PF_INET6,SOCK_DGRAM]");
987 #endif /* CONFIG_IPV6 */
992 radius_change_server(radius, conf->acct_server, NULL,
993 radius->acct_serv_sock, radius->acct_serv_sock6,
996 if (radius->acct_serv_sock >= 0 &&
997 eloop_register_read_sock(radius->acct_serv_sock,
998 radius_client_receive, radius,
999 (void *) RADIUS_ACCT)) {
1000 printf("Could not register read socket for accounting "
1006 if (radius->acct_serv_sock6 >= 0 &&
1007 eloop_register_read_sock(radius->acct_serv_sock6,
1008 radius_client_receive, radius,
1009 (void *) RADIUS_ACCT)) {
1010 printf("Could not register read socket for accounting "
1014 #endif /* CONFIG_IPV6 */
1020 struct radius_client_data *
1021 radius_client_init(void *ctx, struct hostapd_radius_servers *conf)
1023 struct radius_client_data *radius;
1025 radius = os_zalloc(sizeof(struct radius_client_data));
1030 radius->conf = conf;
1031 radius->auth_serv_sock = radius->acct_serv_sock =
1032 radius->auth_serv_sock6 = radius->acct_serv_sock6 =
1033 radius->auth_sock = radius->acct_sock = -1;
1035 if (conf->auth_server && radius_client_init_auth(radius)) {
1036 radius_client_deinit(radius);
1040 if (conf->acct_server && radius_client_init_acct(radius)) {
1041 radius_client_deinit(radius);
1045 if (conf->retry_primary_interval)
1046 eloop_register_timeout(conf->retry_primary_interval, 0,
1047 radius_retry_primary_timer, radius,
1054 void radius_client_deinit(struct radius_client_data *radius)
1059 if (radius->auth_serv_sock >= 0)
1060 eloop_unregister_read_sock(radius->auth_serv_sock);
1061 if (radius->acct_serv_sock >= 0)
1062 eloop_unregister_read_sock(radius->acct_serv_sock);
1064 eloop_cancel_timeout(radius_retry_primary_timer, radius, NULL);
1066 radius_client_flush(radius, 0);
1067 os_free(radius->auth_handlers);
1068 os_free(radius->acct_handlers);
1073 void radius_client_flush_auth(struct radius_client_data *radius, u8 *addr)
1075 struct radius_msg_list *entry, *prev, *tmp;
1078 entry = radius->msgs;
1080 if (entry->msg_type == RADIUS_AUTH &&
1081 os_memcmp(entry->addr, addr, ETH_ALEN) == 0) {
1082 hostapd_logger(radius->ctx, addr,
1083 HOSTAPD_MODULE_RADIUS,
1084 HOSTAPD_LEVEL_DEBUG,
1085 "Removing pending RADIUS authentication"
1086 " message for removed client");
1089 prev->next = entry->next;
1091 radius->msgs = entry->next;
1094 entry = entry->next;
1095 radius_client_msg_free(tmp);
1101 entry = entry->next;
1106 static int radius_client_dump_auth_server(char *buf, size_t buflen,
1107 struct hostapd_radius_server *serv,
1108 struct radius_client_data *cli)
1111 struct radius_msg_list *msg;
1115 for (msg = cli->msgs; msg; msg = msg->next) {
1116 if (msg->msg_type == RADIUS_AUTH)
1121 return os_snprintf(buf, buflen,
1122 "radiusAuthServerIndex=%d\n"
1123 "radiusAuthServerAddress=%s\n"
1124 "radiusAuthClientServerPortNumber=%d\n"
1125 "radiusAuthClientRoundTripTime=%d\n"
1126 "radiusAuthClientAccessRequests=%u\n"
1127 "radiusAuthClientAccessRetransmissions=%u\n"
1128 "radiusAuthClientAccessAccepts=%u\n"
1129 "radiusAuthClientAccessRejects=%u\n"
1130 "radiusAuthClientAccessChallenges=%u\n"
1131 "radiusAuthClientMalformedAccessResponses=%u\n"
1132 "radiusAuthClientBadAuthenticators=%u\n"
1133 "radiusAuthClientPendingRequests=%u\n"
1134 "radiusAuthClientTimeouts=%u\n"
1135 "radiusAuthClientUnknownTypes=%u\n"
1136 "radiusAuthClientPacketsDropped=%u\n",
1138 hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1140 serv->round_trip_time,
1142 serv->retransmissions,
1143 serv->access_accepts,
1144 serv->access_rejects,
1145 serv->access_challenges,
1146 serv->malformed_responses,
1147 serv->bad_authenticators,
1150 serv->unknown_types,
1151 serv->packets_dropped);
1155 static int radius_client_dump_acct_server(char *buf, size_t buflen,
1156 struct hostapd_radius_server *serv,
1157 struct radius_client_data *cli)
1160 struct radius_msg_list *msg;
1164 for (msg = cli->msgs; msg; msg = msg->next) {
1165 if (msg->msg_type == RADIUS_ACCT ||
1166 msg->msg_type == RADIUS_ACCT_INTERIM)
1171 return os_snprintf(buf, buflen,
1172 "radiusAccServerIndex=%d\n"
1173 "radiusAccServerAddress=%s\n"
1174 "radiusAccClientServerPortNumber=%d\n"
1175 "radiusAccClientRoundTripTime=%d\n"
1176 "radiusAccClientRequests=%u\n"
1177 "radiusAccClientRetransmissions=%u\n"
1178 "radiusAccClientResponses=%u\n"
1179 "radiusAccClientMalformedResponses=%u\n"
1180 "radiusAccClientBadAuthenticators=%u\n"
1181 "radiusAccClientPendingRequests=%u\n"
1182 "radiusAccClientTimeouts=%u\n"
1183 "radiusAccClientUnknownTypes=%u\n"
1184 "radiusAccClientPacketsDropped=%u\n",
1186 hostapd_ip_txt(&serv->addr, abuf, sizeof(abuf)),
1188 serv->round_trip_time,
1190 serv->retransmissions,
1192 serv->malformed_responses,
1193 serv->bad_authenticators,
1196 serv->unknown_types,
1197 serv->packets_dropped);
1201 int radius_client_get_mib(struct radius_client_data *radius, char *buf,
1204 struct hostapd_radius_servers *conf = radius->conf;
1206 struct hostapd_radius_server *serv;
1209 if (conf->auth_servers) {
1210 for (i = 0; i < conf->num_auth_servers; i++) {
1211 serv = &conf->auth_servers[i];
1212 count += radius_client_dump_auth_server(
1213 buf + count, buflen - count, serv,
1214 serv == conf->auth_server ?
1219 if (conf->acct_servers) {
1220 for (i = 0; i < conf->num_acct_servers; i++) {
1221 serv = &conf->acct_servers[i];
1222 count += radius_client_dump_acct_server(
1223 buf + count, buflen - count, serv,
1224 serv == conf->acct_server ?
1233 static int radius_servers_diff(struct hostapd_radius_server *nserv,
1234 struct hostapd_radius_server *oserv,
1239 for (i = 0; i < num; i++) {
1240 if (hostapd_ip_diff(&nserv[i].addr, &oserv[i].addr) ||
1241 nserv[i].port != oserv[i].port ||
1242 nserv[i].shared_secret_len != oserv[i].shared_secret_len ||
1243 os_memcmp(nserv[i].shared_secret, oserv[i].shared_secret,
1244 nserv[i].shared_secret_len) != 0)
1252 struct radius_client_data *
1253 radius_client_reconfig(struct radius_client_data *old, void *ctx,
1254 struct hostapd_radius_servers *oldconf,
1255 struct hostapd_radius_servers *newconf)
1257 radius_client_flush(old, 0);
1259 if (newconf->retry_primary_interval !=
1260 oldconf->retry_primary_interval ||
1261 newconf->num_auth_servers != oldconf->num_auth_servers ||
1262 newconf->num_acct_servers != oldconf->num_acct_servers ||
1263 radius_servers_diff(newconf->auth_servers, oldconf->auth_servers,
1264 newconf->num_auth_servers) ||
1265 radius_servers_diff(newconf->acct_servers, oldconf->acct_servers,
1266 newconf->num_acct_servers)) {
1267 hostapd_logger(ctx, NULL, HOSTAPD_MODULE_RADIUS,
1268 HOSTAPD_LEVEL_DEBUG,
1269 "Reconfiguring RADIUS client");
1270 radius_client_deinit(old);
1271 return radius_client_init(ctx, newconf);