2 * event.c Server event handling
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2007 The FreeRADIUS server project
21 * Copyright 2007 Alan DeKok <aland@deployingradius.com>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/radiusd.h>
28 #include <freeradius-devel/modules.h>
29 #include <freeradius-devel/event.h>
30 #include <freeradius-devel/detail.h>
32 #include <freeradius-devel/rad_assert.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
41 #define USEC (1000000)
43 extern pid_t radius_pid;
45 extern int check_config;
46 extern void force_log_reopen(void);
47 extern char *debug_condition;
50 * Ridiculous amounts of local state.
52 static fr_event_list_t *el = NULL;
53 static fr_packet_list_t *pl = NULL;
54 static int request_num_counter = 0;
55 static struct timeval now;
57 static int have_children;
58 static int just_started = TRUE;
62 #define WITH_SELF_PIPE (1)
67 static int self_pipe[2];
72 static pthread_mutex_t proxy_mutex;
73 static rad_listen_t *proxy_listener_list = NULL;
76 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
77 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
79 static pthread_t NO_SUCH_CHILD_PID;
82 * This is easier than ifdef's throughout the code.
84 #define PTHREAD_MUTEX_LOCK(_x)
85 #define PTHREAD_MUTEX_UNLOCK(_x)
86 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
88 radius_handle_request(request, fun);
94 * We need mutexes around the event FD list *only* in certain
97 #if defined (HAVE_PTHREAD_H) && (defined(WITH_PROXY) || defined(WITH_TCP))
98 static pthread_mutex_t fd_mutex;
99 #define FD_MUTEX_LOCK if (have_children) pthread_mutex_lock
100 #define FD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
103 * This is easier than ifdef's throughout the code.
105 #define FD_MUTEX_LOCK(_x)
106 #define FD_MUTEX_UNLOCK(_x)
110 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
113 static fr_packet_list_t *proxy_list = NULL;
114 static void remove_from_proxy_hash(REQUEST *request);
116 static void check_for_zombie_home_server(REQUEST *request);
118 #define remove_from_proxy_hash(foo)
121 static void request_post_handler(REQUEST *request);
122 static void wait_a_bit(void *ctx);
123 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
125 static void event_poll_detail(void *ctx);
128 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
131 radlog(L_ERR, "[%s:%d] %s", file, line, msg);
135 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
138 static void tv_add(struct timeval *tv, int usec_delay)
140 if (usec_delay > USEC) {
141 tv->tv_sec += usec_delay / USEC;
144 tv->tv_usec += usec_delay;
146 if (tv->tv_usec > USEC) {
152 static void remove_from_request_hash(REQUEST *request)
154 if (!request->in_request_hash) return;
156 fr_packet_list_yank(pl, request->packet);
157 request->in_request_hash = FALSE;
159 request_stats_final(request);
162 request->listener->count--;
167 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
170 RADIUS_PACKET **proxy_p;
173 PTHREAD_MUTEX_LOCK(&proxy_mutex);
174 proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
177 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
181 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
182 request->num_proxied_responses++; /* needs to be protected by lock */
184 done = (request->num_proxied_requests == request->num_proxied_responses);
185 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
189 * Catch the most common case of everything working
192 if (done) remove_from_proxy_hash(request);
198 static void remove_from_proxy_hash(REQUEST *request)
201 * Check this without grabbing the mutex because it's a
202 * lot faster that way.
204 if (!request->in_proxy_hash) return;
207 * The "not in hash" flag is definitive. However, if the
208 * flag says that it IS in the hash, there might still be
209 * a race condition where it isn't.
211 PTHREAD_MUTEX_LOCK(&proxy_mutex);
213 if (!request->in_proxy_hash) {
214 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
218 fr_packet_list_yank(proxy_list, request->proxy);
219 fr_packet_list_id_free(proxy_list, request->proxy);
222 * On the FIRST reply, decrement the count of outstanding
223 * requests. Note that this is NOT the count of sent
224 * packets, but whether or not the home server has
227 if (!request->proxy_reply &&
228 request->home_server &&
229 request->home_server->currently_outstanding) {
230 request->home_server->currently_outstanding--;
234 request->proxy_listener->count--;
235 request->proxy_listener = NULL;
239 * Got from YES in hash, to NO, not in hash while we hold
240 * the mutex. This guarantees that when another thread
241 * grabs the mutex, the "not in hash" flag is correct.
243 request->in_proxy_hash = FALSE;
245 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
247 #endif /* WITH_PROXY */
249 static void ev_request_free(REQUEST **prequest)
253 if (!prequest || !*prequest) return;
260 * Divorce the child from the parent first,
261 * then clean up the child.
263 request->coa->parent = NULL;
264 ev_request_free(&request->coa);
268 * Divorce the parent from the child, and leave the
269 * parent still alive.
271 if (request->parent && (request->parent->coa == request)) {
272 request->parent->coa = NULL;
276 if (request->ev) fr_event_delete(el, &request->ev);
278 if (request->in_proxy_hash) remove_from_proxy_hash(request);
280 if (request->in_request_hash) remove_from_request_hash(request);
282 request_free(prequest);
286 static int remove_all_requests(void *ctx, void *data)
288 rad_listen_t *this = ctx;
289 RADIUS_PACKET **packet_p = data;
292 request = fr_packet2myptr(REQUEST, packet, packet_p);
293 if (request->packet->sockfd != this->fd) return 0;
295 switch (request->child_state) {
296 case REQUEST_RUNNING:
297 rad_assert(request->ev != NULL); /* or it's lost forever */
299 request->master_state = REQUEST_STOP_PROCESSING;
303 * Waiting for a reply. There's no point in
304 * doing anything else. We remove it from the
305 * request hash so that we can close the upstream
308 case REQUEST_PROXIED:
309 remove_from_request_hash(request);
310 request->child_state = REQUEST_DONE;
313 case REQUEST_REJECT_DELAY:
314 case REQUEST_CLEANUP_DELAY:
316 ev_request_free(&request);
324 static int remove_all_proxied_requests(void *ctx, void *data)
326 rad_listen_t *this = ctx;
327 RADIUS_PACKET **proxy_p = data;
330 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
331 if (request->proxy->sockfd != this->fd) return 0;
333 switch (request->child_state) {
334 case REQUEST_RUNNING:
335 rad_assert(request->ev != NULL); /* or it's lost forever */
337 request->master_state = REQUEST_STOP_PROCESSING;
341 * Eventually we will discover that there is no
342 * response to the proxied request.
344 case REQUEST_PROXIED:
348 * Keep it in the cache for duplicate detection.
350 case REQUEST_REJECT_DELAY:
351 case REQUEST_CLEANUP_DELAY:
356 remove_from_proxy_hash(request);
359 #endif /* WITH_PROXY */
360 #endif /* WITH_TCP */
364 static int insert_into_proxy_hash(REQUEST *request)
368 void *proxy_listener;
370 rad_assert(request->proxy != NULL);
371 rad_assert(proxy_list != NULL);
375 PTHREAD_MUTEX_LOCK(&proxy_mutex);
376 rcode = fr_packet_list_id_alloc(proxy_list,
377 request->home_server->proto,
378 request->proxy, &proxy_listener);
379 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
383 * Also locks the proxy mutex, so we have to call
384 * it with the mutex unlocked. Some systems
385 * don't support recursive mutexes.
387 if (!proxy_new_listener(request->home_server, 0)) {
388 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
391 request->proxy->src_port = 0; /* Use any new socket */
395 RDEBUG2("ERROR: Failed allocating Id for new socket when proxying requests.");
402 request->proxy_listener = proxy_listener;
404 PTHREAD_MUTEX_LOCK(&proxy_mutex);
405 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
406 fr_packet_list_id_free(proxy_list, request->proxy);
407 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
408 radlog(L_PROXY, "Failed to insert entry into proxy list");
412 request->in_proxy_hash = TRUE;
415 * Keep track of maximum outstanding requests to a
416 * particular home server. 'max_outstanding' is
417 * enforced in home_server_ldb(), in realms.c.
419 if (request->home_server) {
420 request->home_server->currently_outstanding++;
424 request->proxy_listener->count++;
427 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
429 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
430 inet_ntop(request->proxy->dst_ipaddr.af,
431 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
432 request->proxy->dst_port,
440 * Called as BOTH an event, and in-line from other functions.
442 static void wait_for_proxy_id_to_expire(void *ctx)
444 REQUEST *request = ctx;
446 rad_assert(request->magic == REQUEST_MAGIC);
447 rad_assert(request->proxy != NULL);
449 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
450 request->when = request->proxy_when;
453 if (((request->proxy->code == PW_COA_REQUEST) ||
454 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
455 (request->packet->code != request->proxy->code)) {
456 request->when.tv_sec += request->home_server->coa_mrd;
459 request->when.tv_sec += request->home_server->response_window;
461 if ((request->num_proxied_requests == request->num_proxied_responses) ||
463 (request->home_server->proto == IPPROTO_TCP) ||
465 timercmp(&now, &request->when, >)) {
466 if (request->packet) {
467 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
468 request->number, request->packet->id,
469 (unsigned int) (request->timestamp - fr_start_time));
471 RDEBUG2("Cleaning up request %d with timestamp +%d",
473 (unsigned int) (request->timestamp - fr_start_time));
476 ev_request_free(&request);
480 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
484 #ifdef HAVE_PTHREAD_H
485 static void wait_for_child_to_die(void *ctx)
487 REQUEST *request = ctx;
489 rad_assert(request->magic == REQUEST_MAGIC);
491 if ((request->child_state == REQUEST_QUEUED) ||
492 (request->child_state == REQUEST_RUNNING)) {
493 request->delay += (request->delay >> 1);
494 tv_add(&request->when, request->delay);
496 RDEBUG2("Child is still stuck for request %d", request->number);
498 INSERT_EVENT(wait_for_child_to_die, request);
502 RDEBUG2("Child is responsive for request %d", request->number);
503 remove_from_request_hash(request);
506 if (request->proxy) {
507 wait_for_proxy_id_to_expire(request);
512 ev_request_free(&request);
516 static void cleanup_delay(void *ctx)
518 REQUEST *request = ctx;
520 rad_assert(request->magic == REQUEST_MAGIC);
521 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
522 (request->child_state == REQUEST_DONE));
524 remove_from_request_hash(request);
527 if (request->proxy && request->in_proxy_hash) {
528 wait_for_proxy_id_to_expire(request);
533 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
534 request->number, request->packet->id,
535 (unsigned int) (request->timestamp - fr_start_time));
537 ev_request_free(&request);
542 * In daemon mode, AND this request has debug flags set.
544 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
546 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
550 const char *received, *from;
551 const fr_ipaddr_t *ip;
556 rad_assert(request->radlog != NULL);
558 if (direction == 0) {
559 received = "Received";
560 from = "from"; /* what else? */
561 ip = &packet->src_ipaddr;
562 port = packet->src_port;
565 received = "Sending";
566 from = "to"; /* hah! */
567 ip = &packet->dst_ipaddr;
568 port = packet->dst_port;
572 * Client-specific debugging re-prints the input
573 * packet into the client log.
575 * This really belongs in a utility library
577 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
578 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
579 received, fr_packet_codes[packet->code], from,
580 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
581 port, packet->id, packet->data_len);
583 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
585 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
587 packet->code, packet->id, packet->data_len);
590 for (vp = packet->vps; vp != NULL; vp = vp->next) {
591 vp_prints(buffer, sizeof(buffer), vp);
592 request->radlog(L_DBG, 0, request, "\t%s", buffer);
596 static void reject_delay(void *ctx)
598 REQUEST *request = ctx;
600 rad_assert(request->magic == REQUEST_MAGIC);
601 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
603 RDEBUG2("Sending delayed reject for request %d", request->number);
605 DEBUG_PACKET(request, request->reply, 1);
607 request->listener->send(request->listener, request);
609 request->when.tv_sec += request->root->cleanup_delay;
610 request->child_state = REQUEST_CLEANUP_DELAY;
612 INSERT_EVENT(cleanup_delay, request);
617 void revive_home_server(void *ctx)
619 home_server *home = ctx;
623 rad_assert(home->proto != IPPROTO_TCP);
626 home->state = HOME_STATE_ALIVE;
627 home->currently_outstanding = 0;
628 home->revive_time = now;
631 * Delete any outstanding events.
633 if (home->ev) fr_event_delete(el, &home->ev);
635 radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
636 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
637 buffer, sizeof(buffer)),
643 static void no_response_to_ping(void *ctx)
645 REQUEST *request = ctx;
649 rad_assert(request->home_server != NULL);
651 home = request->home_server;
653 rad_assert(home->proto != IPPROTO_TCP);
656 home->num_received_pings = 0;
658 RDEBUG2("No response to status check %d from home server %s port %d",
660 inet_ntop(request->proxy->dst_ipaddr.af,
661 &request->proxy->dst_ipaddr.ipaddr,
662 buffer, sizeof(buffer)),
663 request->proxy->dst_port);
665 check_for_zombie_home_server(request);
667 wait_for_proxy_id_to_expire(request);
671 static void received_response_to_ping(REQUEST *request)
676 rad_assert(request->home_server != NULL);
678 home = request->home_server;
680 rad_assert(home->proto != IPPROTO_TCP);
683 home->num_received_pings++;
685 RDEBUG2("Received response to status check %d (%d in current sequence)",
686 request->number, home->num_received_pings);
689 * Remove the request from any hashes
691 fr_event_delete(el, &request->ev);
692 remove_from_proxy_hash(request);
693 rad_assert(request->in_request_hash == FALSE);
696 * The control socket may have marked the home server as
697 * alive. OR, it may have suddenly started responding to
698 * requests again. If so, don't re-do the "make alive"
701 if (home->state == HOME_STATE_ALIVE) return;
704 * We haven't received enough ping responses to mark it
705 * "alive". Wait a bit.
707 if (home->num_received_pings < home->num_pings_to_alive) {
711 home->state = HOME_STATE_ALIVE;
712 home->currently_outstanding = 0;
713 home->revive_time = now;
715 if (!fr_event_delete(el, &home->ev)) {
716 RDEBUG2("Hmm... no event for home server. Oh well.");
719 radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
720 inet_ntop(request->proxy->dst_ipaddr.af,
721 &request->proxy->dst_ipaddr.ipaddr,
722 buffer, sizeof(buffer)),
723 request->proxy->dst_port);
728 * Called from start of zombie period, OR after control socket
729 * marks the home server dead.
731 static void ping_home_server(void *ctx)
734 home_server *home = ctx;
739 rad_assert(home->proto != IPPROTO_TCP);
742 if ((home->state == HOME_STATE_ALIVE) ||
743 (home->ping_check == HOME_PING_CHECK_NONE) ||
744 (home->ev != NULL)) {
748 request = request_alloc();
749 request->number = request_num_counter++;
751 request->proxy = rad_alloc(1);
752 rad_assert(request->proxy != NULL);
754 fr_event_now(el, &request->when);
755 home->when = request->when;
757 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
758 request->proxy->code = PW_STATUS_SERVER;
760 radius_pairmake(request, &request->proxy->vps,
761 "Message-Authenticator", "0x00", T_OP_SET);
763 } else if (home->type == HOME_TYPE_AUTH) {
764 request->proxy->code = PW_AUTHENTICATION_REQUEST;
766 radius_pairmake(request, &request->proxy->vps,
767 "User-Name", home->ping_user_name, T_OP_SET);
768 radius_pairmake(request, &request->proxy->vps,
769 "User-Password", home->ping_user_password, T_OP_SET);
770 radius_pairmake(request, &request->proxy->vps,
771 "Service-Type", "Authenticate-Only", T_OP_SET);
772 radius_pairmake(request, &request->proxy->vps,
773 "Message-Authenticator", "0x00", T_OP_SET);
776 #ifdef WITH_ACCOUNTING
777 request->proxy->code = PW_ACCOUNTING_REQUEST;
779 radius_pairmake(request, &request->proxy->vps,
780 "User-Name", home->ping_user_name, T_OP_SET);
781 radius_pairmake(request, &request->proxy->vps,
782 "Acct-Status-Type", "Stop", T_OP_SET);
783 radius_pairmake(request, &request->proxy->vps,
784 "Acct-Session-Id", "00000000", T_OP_SET);
785 vp = radius_pairmake(request, &request->proxy->vps,
786 "Event-Timestamp", "0", T_OP_SET);
787 vp->vp_date = now.tv_sec;
789 rad_assert("Internal sanity check failed");
793 radius_pairmake(request, &request->proxy->vps,
794 "NAS-Identifier", "Status Check. Are you alive?",
797 request->proxy->dst_ipaddr = home->ipaddr;
798 request->proxy->dst_port = home->port;
799 request->home_server = home;
801 rad_assert(request->proxy_listener == NULL);
803 if (!insert_into_proxy_hash(request)) {
804 radlog(L_PROXY, "Failed inserting status check %d into proxy hash. Discarding it.",
806 ev_request_free(&request);
809 rad_assert(request->proxy_listener != NULL);
810 request->proxy_listener->send(request->proxy_listener,
813 request->next_callback = NULL;
814 request->child_state = REQUEST_PROXIED;
815 request->when.tv_sec += home->ping_timeout;;
817 INSERT_EVENT(no_response_to_ping, request);
820 * Add +/- 2s of jitter, as suggested in RFC 3539
821 * and in the Issues and Fixes draft.
823 home->when.tv_sec += home->ping_interval - 2;
826 jitter ^= (jitter >> 10);
827 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
829 tv_add(&home->when, jitter);
831 INSERT_EVENT(ping_home_server, home);
835 void mark_home_server_dead(home_server *home, struct timeval *when)
837 int previous_state = home->state;
840 radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
841 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
842 buffer, sizeof(buffer)),
845 home->state = HOME_STATE_IS_DEAD;
846 home->num_received_pings = 0;
848 if (home->ping_check != HOME_PING_CHECK_NONE) {
850 * If the control socket marks us dead, start
851 * pinging. Otherwise, we already started
852 * pinging when it was marked "zombie".
854 if (previous_state == HOME_STATE_ALIVE) {
855 ping_home_server(home);
860 * Revive it after a fixed period of time. This
861 * is very, very, bad.
864 home->when.tv_sec += home->revive_interval;
866 INSERT_EVENT(revive_home_server, home);
870 static void check_for_zombie_home_server(REQUEST *request)
875 home = request->home_server;
877 if (home->state != HOME_STATE_ZOMBIE) return;
879 when = home->zombie_period_start;
880 when.tv_sec += home->zombie_period;
882 fr_event_now(el, &now);
883 if (timercmp(&now, &when, <)) {
887 mark_home_server_dead(home, &request->when);
890 static int proxy_to_virtual_server(REQUEST *request);
892 static int virtual_server_handler(UNUSED REQUEST *request)
894 proxy_to_virtual_server(request);
898 static void proxy_fallback_handler(REQUEST *request)
901 * A proper time is required for wait_a_bit.
903 request->delay = USEC / 10;
904 gettimeofday(&now, NULL);
905 request->next_when = now;
906 tv_add(&request->next_when, request->delay);
907 request->next_callback = wait_a_bit;
910 * Re-queue the request.
912 request->child_state = REQUEST_QUEUED;
914 rad_assert(request->proxy != NULL);
915 if (!thread_pool_addrequest(request, virtual_server_handler)) {
916 request->child_state = REQUEST_DONE;
919 #ifdef HAVE_PTHREAD_H
921 * MAY free the request if we're over max_request_time,
922 * AND we're not in threaded mode!
924 * Note that we call this ONLY if we're threaded, as
925 * if we're NOT threaded, request_post_handler() calls
926 * wait_a_bit(), which means that "request" may not
929 if (have_children) wait_a_bit(request);
934 static int setup_post_proxy_fail(REQUEST *request)
936 DICT_VALUE *dval = NULL;
939 request->child_state = REQUEST_RUNNING;
941 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
942 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
944 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
945 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
949 * See no_response_to_coa_request
951 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
952 request->packet->code &= 0xff; /* restore it */
954 if (request->proxy->code == PW_COA_REQUEST) {
955 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
957 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
958 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
968 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
971 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
975 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
976 if (!vp) vp = radius_paircreate(request, &request->config_items,
977 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
978 vp->vp_integer = dval->value;
980 rad_assert(request->proxy_reply == NULL);
986 static int null_handler(UNUSED REQUEST *request)
991 static void post_proxy_fail_handler(REQUEST *request)
994 * A proper time is required for wait_a_bit.
996 request->delay = USEC / 10;
997 gettimeofday(&now, NULL);
1000 * Not set up to run Post-Proxy-Type = Fail.
1002 * Mark the request as still running, and figure out what
1005 if (!setup_post_proxy_fail(request)) {
1006 request_post_handler(request);
1010 * Re-queue the request.
1012 request->child_state = REQUEST_QUEUED;
1015 * There is a post-proxy-type of fail. We run
1016 * the request through the pre/post proxy
1017 * handlers, just like it was a real proxied
1018 * request. However, we set the per-request
1019 * handler to NULL, as we don't want to do
1022 * Note that when we're not threaded, this will
1023 * process the request even if it's greater than
1024 * max_request_time. That's not fatal.
1026 request->priority = 0;
1027 rad_assert(request->proxy != NULL);
1028 thread_pool_addrequest(request, null_handler);
1032 * MAY free the request if we're over max_request_time,
1033 * AND we're not in threaded mode!
1035 * Note that we call this ONLY if we're threaded, as
1036 * if we're NOT threaded, request_post_handler() calls
1037 * wait_a_bit(), which means that "request" may not
1040 if (have_children) wait_a_bit(request);
1043 /* maybe check this against wait_for_proxy_id_to_expire? */
1044 static void no_response_to_proxied_request(void *ctx)
1046 REQUEST *request = ctx;
1050 rad_assert(request->magic == REQUEST_MAGIC);
1052 if (request->master_state == REQUEST_STOP_PROCESSING) {
1053 ev_request_free(&request);
1057 rad_assert(request->child_state == REQUEST_PROXIED);
1060 * If we've failed over to an internal home server,
1061 * replace the callback with the correct one. This
1062 * is due to locking issues with child threads...
1064 if (request->home_server->server) {
1065 wait_a_bit(request);
1070 if (request->home_server->proto != IPPROTO_TCP)
1072 check_for_zombie_home_server(request);
1074 home = request->home_server;
1077 * The default as of 2.1.7 is to allow requests to
1078 * fail-over to a backup home server when this one does
1079 * not respond. The old behavior can be configured as
1082 if (home->no_response_fail) {
1083 radlog(L_ERR, "Rejecting request %d (proxy Id %d) due to lack of any response from home server %s port %d",
1084 request->number, request->proxy->id,
1085 inet_ntop(request->proxy->dst_ipaddr.af,
1086 &request->proxy->dst_ipaddr.ipaddr,
1087 buffer, sizeof(buffer)),
1088 request->proxy->dst_port);
1090 post_proxy_fail_handler(request);
1093 * Ensure that there is a callback for the request.
1095 request->child_state = REQUEST_RUNNING;
1096 wait_a_bit(request);
1100 * Don't touch request due to race conditions
1105 * Do nothing more. The home server didn't respond,
1106 * but that isn't a catastrophic failure. Some home
1107 * servers don't respond to packets...
1109 if (home->proto == IPPROTO_TCP) {
1111 * FIXME: Set up TCP pinging on this connection.
1113 * Maybe the CONNECTION is dead, but the home
1114 * server is alive. In that case, we need to start
1115 * pinging on the connection.
1117 * This means doing the pinging BEFORE the
1118 * post_proxy_fail_handler above, as it may do
1119 * something with the request, and cause the
1120 * proxy listener to go away!
1126 if (home->state == HOME_STATE_IS_DEAD) {
1127 rad_assert(home->ev != NULL); /* or it will never wake up */
1132 * Enable the zombie period when we notice that the home
1133 * server hasn't responded. We do NOT back-date the start
1134 * of the zombie period.
1136 if (home->state == HOME_STATE_ALIVE) {
1137 home->state = HOME_STATE_ZOMBIE;
1138 home->zombie_period_start = now;
1140 radlog(L_INFO, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1141 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1142 buffer, sizeof(buffer)),
1146 * Start pinging the home server.
1148 ping_home_server(home);
1153 static void wait_a_bit(void *ctx)
1155 struct timeval when;
1156 REQUEST *request = ctx;
1157 fr_event_callback_t callback = NULL;
1159 rad_assert(request->magic == REQUEST_MAGIC);
1162 * The socket was closed. Tell the request that
1163 * there is no point in continuing.
1165 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1166 goto stop_processing;
1171 * The CoA request is a new (internally generated)
1172 * request, created in a child thread. We therefore need
1173 * some way to tie its events back into the main event
1176 if (request->coa && !request->coa->proxy_reply &&
1177 request->coa->next_callback) {
1178 request->coa->when = request->coa->next_when;
1179 INSERT_EVENT(request->coa->next_callback, request->coa);
1180 request->coa->next_callback = NULL;
1181 request->coa->parent = NULL;
1182 request->coa = NULL;
1186 switch (request->child_state) {
1187 case REQUEST_QUEUED:
1188 case REQUEST_RUNNING:
1189 when = request->received;
1190 when.tv_sec += request->root->max_request_time;
1193 * Normally called from the event loop with the
1194 * proper event loop time. Otherwise, called from
1195 * post proxy fail handler, which sets "now", and
1196 * this call won't re-set it, because we're not
1197 * in the event loop.
1199 fr_event_now(el, &now);
1202 * Request still has more time. Continue
1205 if (timercmp(&now, &when, <) ||
1206 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1207 (request->child_state == REQUEST_QUEUED))) {
1208 if (request->delay < (USEC / 10)) {
1209 request->delay = USEC / 10;
1211 request->delay += request->delay >> 1;
1215 * Cap wait at some sane value for detail
1218 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1219 (request->delay > (request->root->max_request_time * USEC))) {
1220 request->delay = request->root->max_request_time * USEC;
1224 request->when = now;
1225 tv_add(&request->when, request->delay);
1226 callback = wait_a_bit;
1230 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1232 * A child thread MAY still be running on the
1233 * request. Ask the thread to stop working on
1236 if (have_children) {
1237 /* FIXME: kill unresponsive children? */
1240 * Print this error message ONLY if
1241 * there's a child currently processing
1242 * the request. As we don't have thread
1243 * locks here, there may be race
1244 * conditions on this check. But it's
1245 * just an error message, so that's OK.
1247 if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1248 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1250 request->module ? request->module : "<server core>",
1251 request->component ? request->component : "<server core>");
1255 request->master_state = REQUEST_STOP_PROCESSING;
1257 request->delay = USEC / 4;
1258 tv_add(&request->when, request->delay);
1259 callback = wait_for_child_to_die;
1262 #else /* no child threads */
1267 * Else there are no child threads. We probably
1268 * should have just marked the request as 'done'
1269 * elsewhere, like in the post-proxy-fail
1270 * handler. But doing that would involve
1271 * checking for max_request_time in multiple
1272 * places, so this may be simplest.
1274 request->child_state = REQUEST_DONE;
1278 * Mark the request as no longer running,
1282 #ifdef HAVE_PTHREAD_H
1283 request->child_pid = NO_SUCH_CHILD_PID;
1288 * This is a CoA request. It's been divorced
1289 * from everything else, so we clean it up now.
1291 if (!request->in_request_hash &&
1293 (request->packet->code != request->proxy->code) &&
1294 ((request->proxy->code == PW_COA_REQUEST) ||
1295 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1297 * FIXME: Do CoA MIBs
1299 ev_request_free(&request);
1303 request_stats_final(request);
1304 cleanup_delay(request);
1307 case REQUEST_REJECT_DELAY:
1308 case REQUEST_CLEANUP_DELAY:
1309 #ifdef HAVE_PTHREAD_H
1310 request->child_pid = NO_SUCH_CHILD_PID;
1312 request_stats_final(request);
1314 case REQUEST_PROXIED:
1315 rad_assert(request->next_callback != NULL);
1316 rad_assert(request->next_callback != wait_a_bit);
1318 request->when = request->next_when;
1319 callback = request->next_callback;
1320 request->next_callback = NULL;
1324 rad_panic("Internal sanity check failure");
1329 * Something major went wrong. Discard the request, and
1332 * FIXME: No idea why this happens or how to fix it...
1333 * It seems to happen *only* when requests are proxied,
1334 * and where the home server doesn't respond. So it looks
1335 * like a race condition above, but it happens in debug
1336 * mode, with no threads...
1339 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1340 ev_request_free(&request);
1344 INSERT_EVENT(callback, request);
1348 static void no_response_to_coa_request(void *ctx)
1350 REQUEST *request = ctx;
1353 rad_assert(request->magic == REQUEST_MAGIC);
1354 rad_assert(request->child_state == REQUEST_PROXIED);
1355 rad_assert(request->home_server != NULL);
1356 rad_assert(!request->in_request_hash);
1358 radlog(L_ERR, "No response to CoA request sent to %s",
1359 inet_ntop(request->proxy->dst_ipaddr.af,
1360 &request->proxy->dst_ipaddr.ipaddr,
1361 buffer, sizeof(buffer)));
1366 request->packet->code |= (PW_COA_REQUEST << 8);
1367 post_proxy_fail_handler(request);
1371 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1375 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1382 packet->data = NULL;
1383 packet->data_len = 0;
1386 return 1; /* time stamp updated */
1391 * Called when we haven't received a response to a CoA request.
1393 static void retransmit_coa_request(void *ctx)
1397 REQUEST *request = ctx;
1399 rad_assert(request->magic == REQUEST_MAGIC);
1400 rad_assert(request->child_state == REQUEST_PROXIED);
1401 rad_assert(request->home_server != NULL);
1402 rad_assert(!request->in_request_hash);
1403 rad_assert(request->parent == NULL);
1405 fr_event_now(el, &now);
1408 * Cap count at MRC, if it is non-zero.
1410 if (request->home_server->coa_mrc &&
1411 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1412 no_response_to_coa_request(request);
1417 * RFC 5080 Section 2.2.1
1419 * RT = 2*RTprev + RAND*RTprev
1420 * = 1.9 * RTprev + rand(0,.2) * RTprev
1421 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1424 delay ^= (delay >> 16);
1426 frac = request->delay / 5;
1427 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1429 delay += (2 * request->delay) - (request->delay / 10);
1432 * Cap delay at MRT, if MRT is non-zero.
1434 if (request->home_server->coa_mrt &&
1435 (delay > (request->home_server->coa_mrt * USEC))) {
1436 int mrt_usec = request->home_server->coa_mrt * USEC;
1439 * delay = MRT + RAND * MRT
1440 * = 0.9 MRT + rand(0,.2) * MRT
1443 delay ^= (delay >> 15);
1445 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1446 delay += mrt_usec - (mrt_usec / 10);
1449 request->delay = delay;
1450 request->when = now;
1451 tv_add(&request->when, request->delay);
1452 mrd = request->proxy_when;
1453 mrd.tv_sec += request->home_server->coa_mrd;
1456 * Cap duration at MRD.
1458 if (timercmp(&mrd, &request->when, <)) {
1459 request->when = mrd;
1460 INSERT_EVENT(no_response_to_coa_request, request);
1463 INSERT_EVENT(retransmit_coa_request, request);
1466 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1468 * Keep a copy of the old Id so that the
1469 * re-transmitted request doesn't re-use the old
1472 RADIUS_PACKET old = *request->proxy;
1475 * Don't free the old Id on error.
1477 if (!insert_into_proxy_hash(request)) {
1478 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1483 * Now that we have a new Id, free the old one.
1485 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1486 fr_packet_list_yank(proxy_list, &old);
1487 fr_packet_list_id_free(proxy_list, &old);
1488 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1490 request->num_proxied_requests = 0;
1491 request->num_proxied_responses = 0;
1494 request->num_proxied_requests++;
1495 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1497 request->proxy_listener->send(request->proxy_listener,
1503 * The original request is either DONE, or in CLEANUP_DELAY.
1505 static int originated_coa_request(REQUEST *request)
1507 int delay, rcode, pre_proxy_type = 0;
1513 rad_assert(request->proxy == NULL);
1514 rad_assert(!request->in_proxy_hash);
1515 rad_assert(request->proxy_reply == NULL);
1517 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1518 if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1520 if (vp->vp_integer == 0) {
1521 ev_request_free(&request->coa);
1522 return 1; /* success */
1525 if (!request->coa) request_alloc_coa(request);
1526 if (!request->coa) return 0;
1532 * src_ipaddr will be set up in proxy_encode.
1534 memset(&ipaddr, 0, sizeof(ipaddr));
1535 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1537 ipaddr.af = AF_INET;
1538 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1540 } else if ((vp = pairfind(coa->proxy->vps,
1541 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1542 ipaddr.af = AF_INET6;
1543 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1545 } else if ((vp = pairfind(coa->proxy->vps,
1546 PW_HOME_SERVER_POOL)) != NULL) {
1547 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1549 if (!coa->home_pool) {
1550 RDEBUG2("WARNING: No such home_server_pool %s",
1553 ev_request_free(&request->coa);
1560 } else if (request->client->coa_pool) {
1561 coa->home_pool = request->client->coa_pool;
1563 } else if (request->client->coa_server) {
1564 coa->home_server = request->client->coa_server;
1568 * If all else fails, send it to the client that
1569 * originated this request.
1571 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1575 * Use the pool, if it exists.
1577 if (coa->home_pool) {
1578 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1579 if (!coa->home_server) {
1580 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1584 } else if (!coa->home_server) {
1585 int port = PW_COA_UDP_PORT;
1587 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1588 if (vp) port = vp->vp_integer;
1590 coa->home_server = home_server_find(&ipaddr, port);
1591 if (!coa->home_server) {
1592 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1593 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1594 buffer, sizeof(buffer)), port);
1599 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1601 switch (vp->vp_integer) {
1602 case PW_COA_REQUEST:
1603 case PW_DISCONNECT_REQUEST:
1604 coa->proxy->code = vp->vp_integer;
1608 DEBUG("Cannot set CoA Packet-Type to code %d",
1614 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1617 * The rest of the server code assumes that
1618 * request->packet && request->reply exist. Copy them
1619 * from the original request.
1621 rad_assert(coa->packet != NULL);
1622 rad_assert(coa->packet->vps == NULL);
1623 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1624 coa->packet->vps = paircopy(request->packet->vps);
1625 coa->packet->data = NULL;
1626 rad_assert(coa->reply != NULL);
1627 rad_assert(coa->reply->vps == NULL);
1628 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1629 coa->reply->vps = paircopy(request->reply->vps);
1630 coa->reply->data = NULL;
1631 coa->config_items = paircopy(request->config_items);
1634 * Call the pre-proxy routines.
1636 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1638 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1639 pre_proxy_type = vp->vp_integer;
1642 if (coa->home_pool && coa->home_pool->virtual_server) {
1643 const char *old_server = coa->server;
1645 coa->server = coa->home_pool->virtual_server;
1646 RDEBUG2(" server %s {", coa->server);
1647 rcode = module_pre_proxy(pre_proxy_type, coa);
1649 coa->server = old_server;
1651 rcode = module_pre_proxy(pre_proxy_type, coa);
1658 * Only send the CoA packet if the pre-proxy code succeeded.
1660 case RLM_MODULE_NOOP:
1662 case RLM_MODULE_UPDATED:
1667 * Source IP / port is set when the proxy socket
1670 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1671 coa->proxy->dst_port = coa->home_server->port;
1673 if (!insert_into_proxy_hash(coa)) {
1674 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1679 * We CANNOT divorce the CoA request from the parent
1680 * request. This function is running in a child thread,
1681 * and we need access to the main event loop in order to
1682 * to add the timers for the CoA packet. See
1687 * Forget about the original request completely at this
1692 gettimeofday(&request->proxy_when, NULL);
1693 request->received = request->next_when = request->proxy_when;
1694 rad_assert(request->proxy_reply == NULL);
1697 * Implement re-transmit algorithm as per RFC 5080
1700 * We want IRT + RAND*IRT
1701 * or 0.9 IRT + rand(0,.2) IRT
1703 * 2^20 ~ USEC, and we want 2.
1704 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1706 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1707 request->delay = delay * request->home_server->coa_irt;
1708 delay = request->home_server->coa_irt * USEC;
1709 delay -= delay / 10;
1710 delay += request->delay;
1712 request->delay = delay;
1713 tv_add(&request->next_when, delay);
1714 request->next_callback = retransmit_coa_request;
1717 * Note that we set proxied BEFORE sending the packet.
1719 * Once we send it, the request is tainted, as
1720 * another thread may have picked it up. Don't
1723 request->num_proxied_requests = 1;
1724 request->num_proxied_responses = 0;
1725 request->child_pid = NO_SUCH_CHILD_PID;
1727 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1729 request->child_state = REQUEST_PROXIED;
1731 DEBUG_PACKET(request, request->proxy, 1);
1733 request->proxy_listener->send(request->proxy_listener,
1737 #endif /* WITH_COA */
1740 static int process_proxy_reply(REQUEST *request)
1743 int post_proxy_type = 0;
1747 * Delete any reply we had accumulated until now.
1749 pairfree(&request->reply->vps);
1752 * Run the packet through the post-proxy stage,
1753 * BEFORE playing games with the attributes.
1755 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1757 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1758 post_proxy_type = vp->vp_integer;
1761 if (request->home_pool && request->home_pool->virtual_server) {
1762 const char *old_server = request->server;
1764 request->server = request->home_pool->virtual_server;
1765 RDEBUG2(" server %s {", request->server);
1766 rcode = module_post_proxy(post_proxy_type, request);
1768 request->server = old_server;
1770 rcode = module_post_proxy(post_proxy_type, request);
1774 if (request->packet->code == request->proxy->code)
1776 * Don't run the next bit if we originated a CoA
1777 * packet, after receiving an Access-Request or
1778 * Accounting-Request.
1783 * There may NOT be a proxy reply, as we may be
1784 * running Post-Proxy-Type = Fail.
1786 if (request->proxy_reply) {
1788 * Delete the Proxy-State Attributes from
1789 * the reply. These include Proxy-State
1790 * attributes from us and remote server.
1792 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1795 * Add the attributes left in the proxy
1796 * reply to the reply list.
1798 pairadd(&request->reply->vps, request->proxy_reply->vps);
1799 request->proxy_reply->vps = NULL;
1802 * Free proxy request pairs.
1804 pairfree(&request->proxy->vps);
1808 default: /* Don't do anything */
1810 case RLM_MODULE_FAIL:
1811 /* FIXME: debug print stuff */
1812 request->child_state = REQUEST_DONE;
1815 case RLM_MODULE_HANDLED:
1816 /* FIXME: debug print stuff */
1817 request->child_state = REQUEST_DONE;
1825 static int request_pre_handler(REQUEST *request)
1829 rad_assert(request->magic == REQUEST_MAGIC);
1830 rad_assert(request->packet != NULL);
1832 request->child_state = REQUEST_RUNNING;
1835 * Don't decode the packet if it's an internal "fake"
1836 * request. Instead, just return so that the caller can
1839 if (request->packet->dst_port == 0) {
1840 request->username = pairfind(request->packet->vps,
1842 request->password = pairfind(request->packet->vps,
1849 * Put the decoded packet into it's proper place.
1851 if (request->proxy_reply != NULL) {
1853 * FIXME: For now, we can only proxy RADIUS packets.
1855 * In order to proxy other packets, we need to
1856 * somehow cache the "decode" function.
1858 rcode = rad_decode(request->proxy_reply, request->proxy,
1859 request->home_server->secret);
1860 DEBUG_PACKET(request, request->proxy_reply, 0);
1863 if (request->packet->vps == NULL) {
1864 rcode = request->listener->decode(request->listener, request);
1866 if (debug_condition) {
1868 const char *my_debug = debug_condition;
1871 * Ignore parse errors.
1873 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1877 request->options = 2;
1878 request->radlog = radlog_request;
1882 DEBUG_PACKET(request, request->packet, 0);
1888 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1889 request->child_state = REQUEST_DONE;
1893 if (!request->username) {
1894 request->username = pairfind(request->packet->vps,
1899 if (request->proxy) {
1900 return process_proxy_reply(request);
1910 * Do state handling when we proxy a request.
1912 static int proxy_request(REQUEST *request)
1914 struct timeval when;
1917 if (request->home_server->server) {
1918 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1922 if (!insert_into_proxy_hash(request)) {
1923 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1927 request->proxy_listener->encode(request->proxy_listener, request);
1929 when = request->received;
1930 when.tv_sec += request->root->max_request_time;
1932 gettimeofday(&request->proxy_when, NULL);
1934 request->next_when = request->proxy_when;
1935 request->next_when.tv_sec += request->home_server->response_window;
1937 rad_assert(request->home_server->response_window > 0);
1939 if (timercmp(&when, &request->next_when, <)) {
1940 request->next_when = when;
1942 request->next_callback = no_response_to_proxied_request;
1944 RDEBUG2("Proxying request %d to home server %s port %d",
1946 inet_ntop(request->proxy->dst_ipaddr.af,
1947 &request->proxy->dst_ipaddr.ipaddr,
1948 buffer, sizeof(buffer)),
1949 request->proxy->dst_port);
1952 * Note that we set proxied BEFORE sending the packet.
1954 * Once we send it, the request is tainted, as
1955 * another thread may have picked it up. Don't
1958 request->num_proxied_requests = 1;
1959 request->num_proxied_responses = 0;
1960 #ifdef HAVE_PTHREAD_H
1961 request->child_pid = NO_SUCH_CHILD_PID;
1963 request->child_state = REQUEST_PROXIED;
1965 DEBUG_PACKET(request, request->proxy, 1);
1967 request->proxy_listener->send(request->proxy_listener,
1974 * "Proxy" the request by sending it to a new virtual server.
1976 static int proxy_to_virtual_server(REQUEST *request)
1979 RAD_REQUEST_FUNP fun;
1981 if (!request->home_server || !request->home_server->server) return 0;
1983 if (request->parent) {
1984 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1988 fake = request_alloc_fake(request);
1990 RDEBUG2("WARNING: Out of memory");
1994 fake->packet->vps = paircopy(request->proxy->vps);
1995 fake->server = request->home_server->server;
1997 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1998 fun = rad_authenticate;
2000 #ifdef WITH_ACCOUNTING
2001 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2002 fun = rad_accounting;
2006 RDEBUG2("Unknown packet type %d", request->proxy->code);
2007 ev_request_free(&fake);
2011 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2012 radius_handle_request(fake, fun);
2013 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2015 if (fake->reply->code != 0) {
2016 request->proxy_reply = fake->reply;
2020 * There was no response
2022 setup_post_proxy_fail(request);
2025 ev_request_free(&fake);
2027 process_proxy_reply(request);
2030 * Process it through the normal section again, but ONLY
2031 * if we received a proxy reply..
2033 if (request->proxy_reply) {
2034 if (request->server) RDEBUG("server %s {",
2035 request->server != NULL ?
2036 request->server : "");
2039 if (request->server) RDEBUG("} # server %s",
2040 request->server != NULL ?
2041 request->server : "");
2044 return 2; /* success, but NOT '1' !*/
2048 * Return 1 if we did proxy it, or the proxy attempt failed
2049 * completely. Either way, the caller doesn't touch the request
2050 * any more if we return 1.
2052 static int successfully_proxied_request(REQUEST *request)
2055 int pre_proxy_type = 0;
2056 VALUE_PAIR *realmpair;
2057 VALUE_PAIR *strippedname;
2059 char *realmname = NULL;
2061 REALM *realm = NULL;
2065 * If it was already proxied, do nothing.
2067 * FIXME: This should really be a serious error.
2069 if (request->in_proxy_hash ||
2070 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2074 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2075 if (!realmpair || (realmpair->length == 0)) {
2078 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2081 switch (request->packet->code) {
2082 case PW_AUTHENTICATION_REQUEST:
2083 pool_type = HOME_TYPE_AUTH;
2086 #ifdef WITH_ACCOUNTING
2087 case PW_ACCOUNTING_REQUEST:
2088 pool_type = HOME_TYPE_ACCT;
2093 case PW_COA_REQUEST:
2094 case PW_DISCONNECT_REQUEST:
2095 pool_type = HOME_TYPE_COA;
2103 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2105 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2110 realmname = NULL; /* no realms */
2115 realmname = (char *) realmpair->vp_strvalue;
2117 realm = realm_find2(realmname);
2119 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2124 * Figure out which pool to use.
2126 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2127 pool = realm->auth_pool;
2129 #ifdef WITH_ACCOUNTING
2130 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2131 pool = realm->acct_pool;
2135 } else if ((request->packet->code == PW_COA_REQUEST) ||
2136 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2137 pool = realm->acct_pool;
2141 rad_panic("Internal sanity check failed");
2145 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2151 home = home_server_ldb(realmname, pool, request);
2153 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2157 request->home_pool = pool;
2161 * Once we've decided to proxy a request, we cannot send
2162 * a CoA packet. So we free up any CoA packet here.
2164 ev_request_free(&request->coa);
2167 * Remember that we sent the request to a Realm.
2169 if (realmname) pairadd(&request->packet->vps,
2170 pairmake("Realm", realmname, T_OP_EQ));
2173 * Strip the name, if told to.
2175 * Doing it here catches the case of proxied tunneled
2178 if (realm && (realm->striprealm == TRUE) &&
2179 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2181 * If there's a Stripped-User-Name attribute in
2182 * the request, then use THAT as the User-Name
2183 * for the proxied request, instead of the
2186 * This is done by making a copy of the
2187 * Stripped-User-Name attribute, turning it into
2188 * a User-Name attribute, deleting the
2189 * Stripped-User-Name and User-Name attributes
2190 * from the vps list, and making the new
2191 * User-Name the head of the vps list.
2193 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2195 vp = radius_paircreate(request, NULL,
2196 PW_USER_NAME, PW_TYPE_STRING);
2197 rad_assert(vp != NULL); /* handled by above function */
2198 /* Insert at the START of the list */
2199 vp->next = request->proxy->vps;
2200 request->proxy->vps = vp;
2202 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2203 sizeof(vp->vp_strvalue));
2204 vp->length = strippedname->length;
2207 * Do NOT delete Stripped-User-Name.
2212 * If there is no PW_CHAP_CHALLENGE attribute but
2213 * there is a PW_CHAP_PASSWORD we need to add it
2214 * since we can't use the request authenticator
2215 * anymore - we changed it.
2217 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2218 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2219 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2220 vp = radius_paircreate(request, &request->proxy->vps,
2221 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2222 vp->length = AUTH_VECTOR_LEN;
2223 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2227 * The RFC's say we have to do this, but FreeRADIUS
2230 vp = radius_paircreate(request, &request->proxy->vps,
2231 PW_PROXY_STATE, PW_TYPE_OCTETS);
2232 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2233 request->packet->id);
2234 vp->length = strlen(vp->vp_strvalue);
2237 * Should be done BEFORE inserting into proxy hash, as
2238 * pre-proxy may use this information, or change it.
2240 request->proxy->code = request->packet->code;
2243 * Call the pre-proxy routines.
2245 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2247 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2248 pre_proxy_type = vp->vp_integer;
2251 rad_assert(request->home_pool != NULL);
2253 if (request->home_pool->virtual_server) {
2254 const char *old_server = request->server;
2256 request->server = request->home_pool->virtual_server;
2257 RDEBUG2(" server %s {", request->server);
2258 rcode = module_pre_proxy(pre_proxy_type, request);
2260 request->server = old_server;
2262 rcode = module_pre_proxy(pre_proxy_type, request);
2265 case RLM_MODULE_FAIL:
2266 case RLM_MODULE_INVALID:
2267 case RLM_MODULE_NOTFOUND:
2268 case RLM_MODULE_USERLOCK:
2270 /* FIXME: debug print failed stuff */
2273 case RLM_MODULE_REJECT:
2274 case RLM_MODULE_HANDLED:
2278 * Only proxy the packet if the pre-proxy code succeeded.
2280 case RLM_MODULE_NOOP:
2282 case RLM_MODULE_UPDATED:
2287 * If it's a fake request, don't send the proxy
2288 * packet. The outer tunnel session will take
2289 * care of doing that.
2291 if (request->packet->dst_port == 0) {
2292 request->home_server = NULL;
2296 if (request->home_server->server) {
2297 return proxy_to_virtual_server(request);
2300 if (!proxy_request(request)) {
2301 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2309 static void request_post_handler(REQUEST *request)
2311 int child_state = -1;
2312 struct timeval when;
2315 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2317 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2318 RDEBUG2("Request %d was cancelled.", request->number);
2319 #ifdef HAVE_PTHREAD_H
2320 request->child_pid = NO_SUCH_CHILD_PID;
2322 child_state = REQUEST_DONE;
2326 if (request->child_state != REQUEST_RUNNING) {
2327 rad_panic("Internal sanity check failed");
2332 * If it's not in the request hash, it's a CoA request.
2335 if (!request->in_request_hash &&
2337 ((request->proxy->code == PW_COA_REQUEST) ||
2338 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2339 request->next_callback = NULL;
2340 child_state = REQUEST_DONE;
2346 * Catch Auth-Type := Reject BEFORE proxying the packet.
2348 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2349 (request->reply->code == 0) &&
2350 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2351 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2352 request->reply->code = PW_AUTHENTICATION_REJECT;
2356 if (request->root->proxy_requests &&
2357 !request->in_proxy_hash &&
2358 (request->reply->code == 0) &&
2359 (request->packet->dst_port != 0) &&
2360 (request->packet->code != PW_STATUS_SERVER)) {
2361 int rcode = successfully_proxied_request(request);
2363 if (rcode == 1) return; /* request is invalid */
2366 * Failed proxying it (dead home servers, etc.)
2367 * Run it through Post-Proxy-Type = Fail, and
2368 * respond to the request.
2370 * Note that we're in a child thread here, so we
2371 * do NOT re-schedule the request. Instead, we
2372 * do what we would have done, which is run the
2373 * pre-handler, a NULL request handler, and then
2376 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2377 request_pre_handler(request);
2381 * Else we weren't supposed to proxy it,
2382 * OR we proxied it internally to a virutal server.
2388 * Fake requests don't get encoded or signed. The caller
2389 * also requires the reply VP's, so we don't free them
2392 if (request->packet->dst_port == 0) {
2393 /* FIXME: RDEBUG going to the next request */
2394 #ifdef HAVE_PTHREAD_H
2395 request->child_pid = NO_SUCH_CHILD_PID;
2397 request->child_state = REQUEST_DONE;
2403 * Copy Proxy-State from the request to the reply.
2405 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2406 if (vp) pairadd(&request->reply->vps, vp);
2410 * Access-Requests get delayed or cached.
2412 switch (request->packet->code) {
2413 case PW_AUTHENTICATION_REQUEST:
2414 gettimeofday(&request->next_when, NULL);
2416 if (request->reply->code == 0) {
2418 * Check if the lack of response is intentional.
2420 vp = pairfind(request->config_items,
2421 PW_RESPONSE_PACKET_TYPE);
2423 RDEBUG2("There was no response configured: rejecting request %d",
2425 request->reply->code = PW_AUTHENTICATION_REJECT;
2427 } else if (vp->vp_integer == 256) {
2428 RDEBUG2("Not responding to request %d",
2432 * Force cleanup after a long
2433 * time, so that we don't
2434 * re-process the packet.
2436 request->next_when.tv_sec += request->root->max_request_time;
2437 request->next_callback = cleanup_delay;
2438 child_state = REQUEST_CLEANUP_DELAY;
2441 request->reply->code = vp->vp_integer;
2447 * Run rejected packets through
2449 * Post-Auth-Type = Reject
2451 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2452 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2453 vp = radius_pairmake(request, &request->config_items,
2454 "Post-Auth-Type", "Reject",
2456 if (vp) rad_postauth(request);
2459 * If configured, delay Access-Reject packets.
2461 * If request->root->reject_delay = 0, we discover
2462 * that we have to send the packet now.
2464 when = request->received;
2465 when.tv_sec += request->root->reject_delay;
2467 if (timercmp(&when, &request->next_when, >)) {
2468 RDEBUG2("Delaying reject of request %d for %d seconds",
2470 request->root->reject_delay);
2471 request->next_when = when;
2472 request->next_callback = reject_delay;
2473 #ifdef HAVE_PTHREAD_H
2474 request->child_pid = NO_SUCH_CHILD_PID;
2476 request->child_state = REQUEST_REJECT_DELAY;
2482 case PW_COA_REQUEST:
2483 case PW_DISCONNECT_REQUEST:
2485 request->next_when.tv_sec += request->root->cleanup_delay;
2486 request->next_callback = cleanup_delay;
2487 child_state = REQUEST_CLEANUP_DELAY;
2490 case PW_ACCOUNTING_REQUEST:
2491 request->next_callback = NULL; /* just to be safe */
2492 child_state = REQUEST_DONE;
2496 * FIXME: Status-Server should probably not be
2499 case PW_STATUS_SERVER:
2500 request->next_callback = NULL;
2501 child_state = REQUEST_DONE;
2508 request->next_callback = NULL;
2509 child_state = REQUEST_DONE;
2514 * Suppress "no reply" packets here, unless we're reading
2515 * from the "detail" file. In that case, we've got to
2516 * tell the detail file handler that the request is dead,
2517 * and it should re-send it.
2518 * If configured, encode, sign, and send.
2520 if ((request->reply->code != 0) ||
2521 (request->listener->type == RAD_LISTEN_DETAIL)) {
2522 DEBUG_PACKET(request, request->reply, 1);
2523 request->listener->send(request->listener, request);
2528 * Now that we've completely processed the request,
2529 * see if we need to originate a CoA request.
2532 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2533 if (!originated_coa_request(request)) {
2534 RDEBUG2("Do CoA Fail handler here");
2536 /* request->coa is stil set, so we can update events */
2542 * Clean up. These are no longer needed.
2544 pairfree(&request->config_items);
2546 pairfree(&request->packet->vps);
2547 request->username = NULL;
2548 request->password = NULL;
2550 pairfree(&request->reply->vps);
2553 if (request->proxy) {
2554 pairfree(&request->proxy->vps);
2556 if (request->proxy_reply) {
2557 pairfree(&request->proxy_reply->vps);
2562 * We're not tracking responses from the home
2563 * server, we can therefore free this memory in
2566 if (!request->in_proxy_hash) {
2567 rad_free(&request->proxy);
2568 rad_free(&request->proxy_reply);
2569 request->home_server = NULL;
2575 RDEBUG2("Finished request %d.", request->number);
2576 rad_assert(child_state >= 0);
2577 request->child_state = child_state;
2580 * Single threaded mode: update timers now.
2582 if (!have_children) wait_a_bit(request);
2586 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2592 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2593 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2595 switch (request->child_state) {
2596 case REQUEST_QUEUED:
2597 case REQUEST_RUNNING:
2601 radlog(L_ERR, "Discarding duplicate request from "
2602 "client %s port %d - ID: %d due to unfinished request %d",
2604 request->packet->src_port,request->packet->id,
2609 case REQUEST_PROXIED:
2611 * We're not supposed to have duplicate
2612 * accounting packets. The other states handle
2613 * duplicates fine (discard, or send duplicate
2614 * reply). But we do NOT want to retransmit an
2615 * accounting request here, because that would
2616 * involve updating the Acct-Delay-Time, and
2617 * therefore changing the packet Id, etc.
2619 * Instead, we just discard the packet. We may
2620 * eventually respond, or the client will send a
2621 * new accounting packet.
2623 * The same comments go for Status-Server, and
2624 * other packet types.
2626 * FIXME: coa: when we proxy CoA && Disconnect
2627 * packets, this logic has to be fixed.
2629 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2633 check_for_zombie_home_server(request);
2636 * If we've just discovered that the home server
2637 * is dead, OR the socket has been closed, look for
2638 * another connection to a home server.
2640 if (((request->packet->dst_port != 0) &&
2641 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2642 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2645 remove_from_proxy_hash(request);
2647 home = home_server_ldb(NULL, request->home_pool, request);
2649 RDEBUG2("Failed to find live home server for request %d", request->number);
2652 * Do post-request processing,
2653 * and any insertion of necessary
2656 post_proxy_fail_handler(request);
2660 request->proxy->code = request->packet->code;
2663 * Free the old packet, to force re-encoding
2665 free(request->proxy->data);
2666 request->proxy->data = NULL;
2667 request->proxy->data_len = 0;
2670 * This request failed over to a virtual
2671 * server. Push it back onto the queue
2674 if (request->home_server->server) {
2675 proxy_fallback_handler(request);
2680 * Try to proxy the request.
2682 if (!proxy_request(request)) {
2683 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2684 goto no_home_servers;
2688 * This code executes in the main server
2689 * thread, so there's no need for locking.
2691 rad_assert(request->next_callback != NULL);
2692 INSERT_EVENT(request->next_callback, request);
2693 request->next_callback = NULL;
2695 } /* else the home server is still alive */
2698 if (request->home_server->proto == IPPROTO_TCP) {
2699 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2700 inet_ntop(request->proxy->dst_ipaddr.af,
2701 &request->proxy->dst_ipaddr.ipaddr,
2702 buffer, sizeof(buffer)),
2703 request->proxy->dst_port,
2704 request->proxy->id);
2709 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2710 inet_ntop(request->proxy->dst_ipaddr.af,
2711 &request->proxy->dst_ipaddr.ipaddr,
2712 buffer, sizeof(buffer)),
2713 request->proxy->dst_port,
2714 request->proxy->id);
2715 request->num_proxied_requests++;
2717 DEBUG_PACKET(request, request->proxy, 1);
2718 request->proxy_listener->send(request->proxy_listener,
2723 case REQUEST_REJECT_DELAY:
2724 RDEBUG2("Waiting to send Access-Reject "
2725 "to client %s port %d - ID: %d",
2727 request->packet->src_port, request->packet->id);
2730 case REQUEST_CLEANUP_DELAY:
2732 if (request->reply->code == 0) {
2733 RDEBUG2("Ignoring retransmit from client %s port %d "
2734 "- ID: %d, no reply was configured",
2736 request->packet->src_port, request->packet->id);
2741 * FIXME: This sends duplicate replies to
2742 * accounting requests, even if Acct-Delay-Time
2743 * or Event-Timestamp is in the packet. In those
2744 * cases, the Id should be changed, and the packet
2747 RDEBUG2("Sending duplicate reply "
2748 "to client %s port %d - ID: %d",
2750 request->packet->src_port, request->packet->id);
2751 DEBUG_PACKET(request, request->reply, 1);
2752 request->listener->send(request->listener, request);
2758 static void received_conflicting_request(REQUEST *request,
2759 const RADCLIENT *client)
2761 radlog(L_ERR, "Received conflicting packet from "
2762 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2764 request->packet->src_port, request->packet->id,
2768 * Nuke it from the request hash, so we can receive new
2771 remove_from_request_hash(request);
2773 switch (request->child_state) {
2775 * Tell it to stop, and wait for it to do so.
2778 request->master_state = REQUEST_STOP_PROCESSING;
2779 request->delay += request->delay >> 1;
2781 tv_add(&request->when, request->delay);
2783 INSERT_EVENT(wait_for_child_to_die, request);
2787 * Catch race conditions. It may have switched
2788 * from running to done while this code is being
2791 case REQUEST_REJECT_DELAY:
2792 case REQUEST_CLEANUP_DELAY:
2799 static int can_handle_new_request(RADIUS_PACKET *packet,
2801 struct main_config_t *root)
2804 * Count the total number of requests, to see if
2805 * there are too many. If so, return with an
2808 if (root->max_requests) {
2809 int request_count = fr_packet_list_num_elements(pl);
2812 * This is a new request. Let's see if
2813 * it makes us go over our configured
2816 if (request_count > root->max_requests) {
2817 radlog(L_ERR, "Dropping request (%d is too many): "
2818 "from client %s port %d - ID: %d", request_count,
2820 packet->src_port, packet->id);
2821 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2822 "\tThe value for 'max_requests' is probably set too low.\n");
2824 } /* else there were a small number of requests */
2825 } /* else there was no configured limit for requests */
2828 * FIXME: Add per-client checks. If one client is sending
2829 * too many packets, start discarding them.
2831 * We increment the counters here, and decrement them
2832 * when the response is sent... somewhere in this file.
2836 * FUTURE: Add checks for system load. If the system is
2837 * busy, start dropping requests...
2839 * We can probably keep some statistics ourselves... if
2840 * there are more requests coming in than we can handle,
2841 * start dropping some.
2848 int received_request(rad_listen_t *listener,
2849 RADIUS_PACKET *packet, REQUEST **prequest,
2852 RADIUS_PACKET **packet_p;
2853 REQUEST *request = NULL;
2854 struct main_config_t *root = &mainconfig;
2856 packet_p = fr_packet_list_find(pl, packet);
2858 request = fr_packet2myptr(REQUEST, packet, packet_p);
2859 rad_assert(request->in_request_hash);
2861 if ((request->packet->data_len == packet->data_len) &&
2862 (memcmp(request->packet->vector, packet->vector,
2863 sizeof(packet->vector)) == 0)) {
2864 received_retransmit(request, client);
2869 * The new request is different from the old one,
2870 * but maybe the old is finished. If so, delete
2873 switch (request->child_state) {
2874 struct timeval when;
2878 * Special hacks for race conditions.
2879 * The reply is encoded, and therefore
2880 * likely sent. We received a *new*
2881 * packet from the client, likely before
2882 * the next line or two of code which
2883 * updated the child state. In this
2884 * case, just accept the new request.
2886 if ((request->reply->code != 0) &&
2887 request->reply->data) {
2888 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2890 packet->src_port, packet->id,
2892 remove_from_request_hash(request);
2897 gettimeofday(&when, NULL);
2901 * If the cached request was received
2902 * within the last second, then we
2903 * discard the NEW request instead of the
2904 * old one. This will happen ONLY when
2905 * the client is severely broken, and is
2906 * sending conflicting packets very
2909 if (timercmp(&when, &request->received, <)) {
2910 radlog(L_ERR, "Discarding conflicting packet from "
2911 "client %s port %d - ID: %d due to recent request %d.",
2913 packet->src_port, packet->id,
2918 received_conflicting_request(request, client);
2922 case REQUEST_REJECT_DELAY:
2923 case REQUEST_CLEANUP_DELAY:
2924 request->child_state = REQUEST_DONE;
2926 cleanup_delay(request);
2933 * We may want to quench the new request.
2935 if ((listener->type != RAD_LISTEN_DETAIL) &&
2936 !can_handle_new_request(packet, client, root)) {
2941 * Create and initialize the new request.
2943 request = request_alloc(); /* never fails */
2945 if ((request->reply = rad_alloc(0)) == NULL) {
2946 radlog(L_ERR, "No memory");
2950 request->listener = listener;
2951 request->client = client;
2952 request->packet = packet;
2953 request->packet->timestamp = request->timestamp;
2954 request->number = request_num_counter++;
2955 request->priority = listener->type;
2956 #ifdef HAVE_PTHREAD_H
2957 request->child_pid = NO_SUCH_CHILD_PID;
2961 * Status-Server packets go to the head of the queue.
2963 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2966 * Set virtual server identity
2968 if (client->server) {
2969 request->server = client->server;
2970 } else if (listener->server) {
2971 request->server = listener->server;
2973 request->server = NULL;
2977 * Remember the request in the list.
2979 if (!fr_packet_list_insert(pl, &request->packet)) {
2980 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2981 ev_request_free(&request);
2985 request->in_request_hash = TRUE;
2986 request->root = root;
2989 request->listener->count++;
2993 * The request passes many of our sanity checks.
2994 * From here on in, if anything goes wrong, we
2995 * send a reject message, instead of dropping the
3000 * Build the reply template from the request.
3003 request->reply->sockfd = request->packet->sockfd;
3004 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3005 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3006 request->reply->dst_port = request->packet->src_port;
3007 request->reply->src_port = request->packet->dst_port;
3008 request->reply->id = request->packet->id;
3009 request->reply->code = 0; /* UNKNOWN code */
3010 memcpy(request->reply->vector, request->packet->vector,
3011 sizeof(request->reply->vector));
3012 request->reply->vps = NULL;
3013 request->reply->data = NULL;
3014 request->reply->data_len = 0;
3016 request->master_state = REQUEST_ACTIVE;
3017 request->child_state = REQUEST_QUEUED;
3018 request->next_callback = NULL;
3020 gettimeofday(&request->received, NULL);
3021 request->timestamp = request->received.tv_sec;
3022 request->when = request->received;
3024 request->delay = USEC;
3026 tv_add(&request->when, request->delay);
3028 INSERT_EVENT(wait_a_bit, request);
3030 *prequest = request;
3036 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3042 * Also removes from the proxy hash if responses == requests
3044 request = lookup_in_proxy_hash(packet);
3047 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3048 inet_ntop(packet->src_ipaddr.af,
3049 &packet->src_ipaddr.ipaddr,
3050 buffer, sizeof(buffer)),
3051 packet->src_port, packet->id);
3056 * We haven't replied to the NAS, but we have seen an
3057 * earlier reply from the home server. Ignore this packet,
3058 * as we're likely still processing the previous reply.
3060 if (request->proxy_reply) {
3061 if (memcmp(request->proxy_reply->vector,
3063 sizeof(request->proxy_reply->vector)) == 0) {
3064 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
3065 inet_ntop(packet->src_ipaddr.af,
3066 &packet->src_ipaddr.ipaddr,
3067 buffer, sizeof(buffer)),
3068 packet->src_port, packet->id,
3072 * ? The home server gave us a new proxy
3073 * reply which doesn't match the old
3076 RDEBUG2("Ignoring conflicting proxy reply");
3079 /* assert that there's an event queued for request? */
3084 * Verify the packet before doing ANYTHING with it. This
3085 * means we're doing more MD5 checks in the server core.
3086 * However, we can fix that by moving to multiple threads
3087 * listening on sockets.
3089 * We do this AFTER looking the request up in the hash,
3090 * and AFTER vhecking if we saw a previous request. This
3091 * helps minimize the DoS effect of people attacking us
3092 * with spoofed packets.
3094 if (rad_verify(packet, request->proxy,
3095 request->home_server->secret) != 0) {
3096 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3100 gettimeofday(&now, NULL);
3103 * Maybe move this earlier in the decision process?
3104 * Having it here means that late or duplicate proxy
3105 * replies no longer get the home server marked as
3106 * "alive". This might be good for stability, though.
3108 * FIXME: Do we really want to do this whenever we
3109 * receive a packet? Setting this here means that we
3110 * mark it alive on *any* packet, even if it's lost all
3111 * of the *other* packets in the last 10s.
3113 request->home_server->state = HOME_STATE_ALIVE;
3117 * When originating CoA, the "proxy" reply is the reply
3118 * to the CoA request that we originated. At this point,
3119 * the original request is finished, and it has a reply.
3121 * However, if we haven't separated the two requests, do
3122 * so now. This is done so that cleaning up the original
3123 * request won't cause the CoA request to be free'd. See
3124 * util.c, request_free()
3126 if (request->parent && (request->parent->coa == request)) {
3127 request->parent->coa = NULL;
3128 request->parent = NULL;
3132 * Skip the next set of checks, as the original
3133 * reply is cached. We want to be able to still
3134 * process the CoA reply, AND to reference the
3135 * original request/reply.
3137 * This is getting to be really quite a bit of a
3143 * If there's a reply to the NAS, ignore everything
3144 * related to proxy responses
3146 if (request->reply && request->reply->code != 0) {
3147 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3153 * The average includes our time to receive packets and
3154 * look them up in the hashes, which should be the same
3157 * We update the response time only for the FIRST packet
3160 if (request->home_server->ema.window > 0) {
3161 radius_stats_ema(&request->home_server->ema,
3162 &now, &request->proxy_when);
3166 switch (request->child_state) {
3167 case REQUEST_QUEUED:
3168 case REQUEST_RUNNING:
3169 radlog(L_ERR, "Internal sanity check failed for child state");
3172 case REQUEST_REJECT_DELAY:
3173 case REQUEST_CLEANUP_DELAY:
3175 radlog(L_ERR, "Reply from home server %s port %d - ID: %d arrived too late for request %d. Try increasing 'retry_delay' or 'max_request_time'",
3176 inet_ntop(packet->src_ipaddr.af,
3177 &packet->src_ipaddr.ipaddr,
3178 buffer, sizeof(buffer)),
3179 packet->src_port, packet->id,
3181 /* assert that there's an event queued for request? */
3184 case REQUEST_PROXIED:
3188 request->proxy_reply = packet;
3192 * Perform RTT calculations, as per RFC 2988 (for TCP).
3193 * Note that we only do so on the first response.
3195 if ((request->num_proxied_responses == 1)
3197 home_server *home = request->home_server;
3199 rtt = now.tv_sec - request->proxy_when.tv_sec;
3202 rtt -= request->proxy_when.tv_usec;
3204 if (!home->has_rtt) {
3205 home->has_rtt = TRUE;
3208 home->rttvar = rtt / 2;
3211 home->rttvar -= home->rttvar >> 2;
3212 home->rttvar += (home->srtt - rtt);
3213 home->srtt -= home->srtt >> 3;
3214 home->srtt += rtt >> 3;
3217 home->rto = home->srtt;
3218 if (home->rttvar > (USEC / 4)) {
3219 home->rto += home->rttvar * 4;
3227 * There's no incoming request, so it's a proxied packet
3230 if (!request->packet) {
3231 received_response_to_ping(request);
3232 request->proxy_reply = NULL; /* caller will free it */
3233 ev_request_free(&request);
3237 request->child_state = REQUEST_QUEUED;
3238 request->when = now;
3239 request->delay = USEC;
3240 request->priority = RAD_LISTEN_PROXY;
3241 tv_add(&request->when, request->delay);
3244 * Wait a bit will take care of max_request_time
3246 INSERT_EVENT(wait_a_bit, request);
3251 #endif /* WITH_PROXY */
3254 static void tcp_socket_lifetime(void *ctx)
3256 rad_listen_t *listener = ctx;
3259 listener->print(listener, buffer, sizeof(buffer));
3261 DEBUG("Reached maximum lifetime on socket %s", buffer);
3263 listener->status = RAD_LISTEN_STATUS_CLOSED;
3264 event_new_fd(listener);
3267 static void tcp_socket_idle_timeout(void *ctx)
3269 rad_listen_t *listener = ctx;
3270 listen_socket_t *sock = listener->data;
3273 fr_event_now(el, &now); /* should always succeed... */
3275 rad_assert(sock->home != NULL);
3278 * We implement idle timeout by polling, because it's
3279 * cheaper than resetting the idle timeout every time
3280 * we send / receive a packet.
3282 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3283 struct timeval when;
3284 void *fun = tcp_socket_idle_timeout;
3286 when.tv_sec = sock->last_packet;
3287 when.tv_sec += sock->home->idle_timeout;
3290 if (sock->home->lifetime &&
3291 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3292 when.tv_sec = sock->opened + sock->home->lifetime;
3293 fun = tcp_socket_lifetime;
3296 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3297 rad_panic("Failed to insert event");
3303 listener->print(listener, buffer, sizeof(buffer));
3305 DEBUG("Reached idle timeout on socket %s", buffer);
3307 listener->status = RAD_LISTEN_STATUS_CLOSED;
3308 event_new_fd(listener);
3312 void event_new_fd(rad_listen_t *this)
3316 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3318 this->print(this, buffer, sizeof(buffer));
3320 if (this->status == RAD_LISTEN_STATUS_INIT) {
3322 DEBUG("Listening on %s", buffer);
3324 DEBUG2(" ... adding new socket %s", buffer);
3329 * Add it to the list of sockets we can use.
3330 * Server sockets (i.e. auth/acct) are never
3331 * added to the packet list.
3333 if (this->type == RAD_LISTEN_PROXY) {
3334 listen_socket_t *sock = this->data;
3336 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3337 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3339 &sock->other_ipaddr, sock->other_port,
3341 radlog(L_ERR, "Fatal error adding socket: %s",
3348 sock->home->num_connections++;
3351 * If necessary, add it to the list of
3352 * new proxy listeners.
3354 if (sock->home->lifetime || sock->home->idle_timeout) {
3355 this->next = proxy_listener_list;
3356 proxy_listener_list = this;
3359 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3362 * Tell the main thread that we've added
3363 * a proxy listener, but only if we need
3364 * to update the event list. Do this
3365 * with the mutex unlocked, to reduce
3369 if (sock->home->lifetime || sock->home->idle_timeout) {
3370 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3378 * Detail files are always known, and aren't
3379 * put into the socket event loop.
3381 if (this->type == RAD_LISTEN_DETAIL) {
3382 this->status = RAD_LISTEN_STATUS_KNOWN;
3385 * Set up the first poll interval.
3387 event_poll_detail(this);
3392 FD_MUTEX_LOCK(&fd_mutex);
3393 if (!fr_event_fd_insert(el, 0, this->fd,
3394 event_socket_handler, this)) {
3395 radlog(L_ERR, "Failed remembering handle for proxy socket!");
3398 FD_MUTEX_UNLOCK(&fd_mutex);
3400 this->status = RAD_LISTEN_STATUS_KNOWN;
3405 * Something went wrong with the socket: make it harmless.
3407 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3411 * Remove it from the list of live FD's.
3413 FD_MUTEX_LOCK(&fd_mutex);
3414 fr_event_fd_delete(el, 0, this->fd);
3415 FD_MUTEX_UNLOCK(&fd_mutex);
3418 if (this->type != RAD_LISTEN_PROXY)
3421 if (this->count != 0) {
3422 fr_packet_list_walk(pl, this,
3423 remove_all_requests);
3426 if (this->count == 0) {
3427 this->status = RAD_LISTEN_STATUS_FINISH;
3433 int count = this->count;
3438 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3439 if (!fr_packet_list_socket_freeze(proxy_list,
3441 radlog(L_ERR, "Fatal error freezing socket: %s",
3447 * Doing this with the proxy mutex held
3448 * is a Bad Thing. We should move to
3449 * finer-grained mutexes.
3451 count = this->count;
3453 fr_packet_list_walk(proxy_list, this,
3454 remove_all_proxied_requests);
3456 count = this->count; /* protected by mutex */
3457 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3460 this->status = RAD_LISTEN_STATUS_FINISH;
3467 * Re-open the socket, pointing it to /dev/null.
3468 * This means that all writes proceed without
3469 * blocking, and all reads return "no data".
3471 * This leaves the socket active, so any child
3472 * threads won't go insane. But it means that
3473 * they cannot send or receive any packets.
3475 * This is EXTRA work in the normal case, when
3476 * sockets are closed without error. But it lets
3477 * us have one simple processing method for all
3480 devnull = open("/dev/null", O_RDWR);
3482 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3486 if (dup2(devnull, this->fd) < 0) {
3487 radlog(L_ERR, "FATAL failure closing socket: %s",
3493 this->status = RAD_LISTEN_STATUS_CLOSED;
3496 * Fall through to the next section.
3501 * Called ONLY from the main thread. On the following
3507 * (and falling through from "forcibly close FD" above)
3508 * client closed connection on us
3509 * client sent us a bad packet.
3511 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3512 int count = this->count;
3513 rad_assert(this->type != RAD_LISTEN_DETAIL);
3517 * Remove it from the list of active sockets, so
3518 * that it isn't used when proxying new packets.
3520 if (this->type == RAD_LISTEN_PROXY) {
3521 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3522 if (!fr_packet_list_socket_freeze(proxy_list,
3524 radlog(L_ERR, "Fatal error freezing socket: %s",
3528 count = this->count; /* protected by mutex */
3529 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3534 * Requests are still using the socket. Wait for
3538 struct timeval when;
3539 listen_socket_t *sock = this->data;
3542 * Try again to clean up the socket in 30
3545 gettimeofday(&when, NULL);
3548 if (!fr_event_insert(el,
3549 (fr_event_callback_t) event_new_fd,
3550 this, &when, &sock->ev)) {
3551 rad_panic("Failed to insert event");
3558 * No one is using this socket: we can delete it
3561 this->status = RAD_LISTEN_STATUS_FINISH;
3565 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3566 listen_socket_t *sock = this->data;
3568 rad_assert(this->count == 0);
3569 DEBUG2(" ... closing socket %s", buffer);
3572 * Remove it from the list of live FD's. Note
3573 * that it MAY also have been removed above. We
3574 * do it again here, to catch the case of sockets
3575 * closing on idle timeout, or max
3576 * lifetime... AFTER all requests have finished
3579 FD_MUTEX_LOCK(&fd_mutex);
3580 fr_event_fd_delete(el, 0, this->fd);
3581 FD_MUTEX_UNLOCK(&fd_mutex);
3585 * Remove it from the list of sockets to be used
3588 if (this->type == RAD_LISTEN_PROXY) {
3589 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3590 if (!fr_packet_list_socket_remove(proxy_list,
3592 radlog(L_ERR, "Fatal error removing socket: %s",
3596 if (sock->home) sock->home->num_connections--;
3597 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3602 * Remove any pending cleanups.
3604 if (sock->ev) fr_event_delete(el, &sock->ev);
3607 * And finally, close the socket.
3613 static void handle_signal_self(int flag)
3615 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3616 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3617 radlog(L_INFO, "Received TERM signal");
3618 fr_event_loop_exit(el, 1);
3620 fr_event_loop_exit(el, 2);
3624 } /* else exit/term flags weren't set */
3627 * Tell the even loop to stop processing.
3629 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3631 static time_t last_hup = 0;
3633 DEBUG("Received HUP signal.");
3636 if ((int) (when - last_hup) < 5) {
3637 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3642 fr_event_loop_exit(el, 0x80);
3646 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3650 * FIXME: O(N) loops suck.
3652 for (this = mainconfig.listen;
3654 this = this->next) {
3655 if (this->type != RAD_LISTEN_DETAIL) continue;
3658 * This one didn't send the signal, skip
3661 if (!this->decode(this, NULL)) continue;
3664 * Go service the interrupt.
3666 event_poll_detail(this);
3673 * Add event handlers for idle timeouts && maximum lifetime.
3675 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3676 struct timeval when;
3679 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3681 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3683 while (proxy_listener_list) {
3684 rad_listen_t *this = proxy_listener_list;
3685 listen_socket_t *sock = this->data;
3687 proxy_listener_list = this->next;
3690 if (!sock->home) continue; /* skip UDP sockets */
3694 if (!sock->home->idle_timeout) {
3695 rad_assert(sock->home->lifetime != 0);
3697 when.tv_sec += sock->home->lifetime;
3698 fun = tcp_socket_lifetime;
3700 rad_assert(sock->home->idle_timeout != 0);
3702 when.tv_sec += sock->home->idle_timeout;
3703 fun = tcp_socket_idle_timeout;
3706 if (!fr_event_insert(el, fun, this, &when,
3708 rad_panic("Failed to insert event");
3712 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3717 #ifndef WITH_SELF_PIPE
3718 void radius_signal_self(int flag)
3720 handle_signal_self(flag);
3724 * Inform ourselves that we received a signal.
3726 void radius_signal_self(int flag)
3732 * The read MUST be non-blocking for this to work.
3734 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3738 for (i = 0; i < rcode; i++) {
3739 buffer[0] |= buffer[i];
3747 write(self_pipe[1], buffer, 1);
3751 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3752 UNUSED int fd, UNUSED void *ctx)
3757 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3758 if (rcode <= 0) return;
3761 * Merge pending signals.
3763 for (i = 0; i < rcode; i++) {
3764 buffer[0] |= buffer[i];
3767 handle_signal_self(buffer[0]);
3772 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3775 rad_listen_t *listener = ctx;
3776 RAD_REQUEST_FUNP fun;
3779 rad_assert(xel == el);
3783 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3785 if (!listener->recv(listener, &fun, &request)) return;
3787 if (!thread_pool_addrequest(request, fun)) {
3788 request->child_state = REQUEST_DONE;
3792 typedef struct listen_detail_t {
3797 * This function is called periodically to see if this detail
3798 * file is available for reading.
3800 static void event_poll_detail(void *ctx)
3803 RAD_REQUEST_FUNP fun;
3805 rad_listen_t *this = ctx;
3806 struct timeval when;
3807 listen_detail_t *detail = this->data;
3809 rad_assert(this->type == RAD_LISTEN_DETAIL);
3812 * Try to read something.
3814 * FIXME: This does poll AND receive.
3816 rcode = this->recv(this, &fun, &request);
3818 rad_assert(fun != NULL);
3819 rad_assert(request != NULL);
3821 if (!thread_pool_addrequest(request, fun)) {
3822 request->child_state = REQUEST_DONE;
3826 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3830 * Backdoor API to get the delay until the next poll
3833 delay = this->encode(this, NULL);
3834 tv_add(&when, delay);
3836 if (!fr_event_insert(el, event_poll_detail, this,
3837 &when, &detail->ev)) {
3838 radlog(L_ERR, "Failed creating handler");
3844 static void event_status(struct timeval *wake)
3846 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3850 if (debug_flag == 0) {
3852 radlog(L_INFO, "Ready to process requests.");
3853 just_started = FALSE;
3859 DEBUG("Ready to process requests.");
3861 } else if ((wake->tv_sec != 0) ||
3862 (wake->tv_usec >= 100000)) {
3863 DEBUG("Waking up in %d.%01u seconds.",
3864 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3869 * FIXME: Put this somewhere else, where it isn't called
3870 * all of the time...
3873 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3875 * If there are no child threads, then there may
3876 * be child processes. In that case, wait for
3877 * their exit status, and throw that exit status
3878 * away. This helps get rid of zxombie children.
3880 while (waitpid(-1, &argval, WNOHANG) > 0) {
3888 * Externally-visibly functions.
3890 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3892 rad_listen_t *head = NULL;
3896 time(&fr_start_time);
3898 el = fr_event_list_create(event_status);
3901 pl = fr_packet_list_create(0);
3902 if (!pl) return 0; /* leak el */
3904 request_num_counter = 0;
3907 if (mainconfig.proxy_requests) {
3909 * Create the tree for managing proxied requests and
3912 proxy_list = fr_packet_list_create(1);
3913 if (!proxy_list) return 0;
3915 #ifdef HAVE_PTHREAD_H
3916 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3917 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3926 * Just before we spawn the child threads, force the log
3927 * subsystem to re-open the log file for every write.
3929 if (spawn_flag) force_log_reopen();
3931 #ifdef HAVE_PTHREAD_H
3933 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3935 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3938 * Initialize the threads ONLY if we're spawning, AND
3939 * we're running normally.
3941 if (spawn_flag && !check_config &&
3942 (thread_pool_init(cs, &spawn_flag) < 0)) {
3948 * Move all of the thread calls to this file?
3950 * It may be best for the mutexes to be in this file...
3952 have_children = spawn_flag;
3955 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3960 #ifdef WITH_SELF_PIPE
3962 * Child threads need a pipe to signal us, as do the
3965 if (pipe(self_pipe) < 0) {
3966 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3970 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3971 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3975 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3976 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3981 if (!fr_event_fd_insert(el, 0, self_pipe[0],
3982 event_signal_handler, el)) {
3983 radlog(L_ERR, "Failed creating handler for signals");
3986 #endif /* WITH_SELF_PIPE */
3988 DEBUG("%s: #### Opening IP addresses and Ports ####",
3992 * The server temporarily switches to an unprivileged
3993 * user very early in the bootstrapping process.
3994 * However, some sockets MAY require privileged access
3995 * (bind to device, or to port < 1024, or to raw
3996 * sockets). Those sockets need to call suid up/down
3997 * themselves around the functions that need a privileged
4000 if (listen_init(cs, &head) < 0) {
4004 mainconfig.listen = head;
4007 * At this point, no one has any business *ever* going
4010 fr_suid_down_permanent();
4016 static int request_hash_cb(UNUSED void *ctx, void *data)
4018 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4021 rad_assert(request->in_proxy_hash == FALSE);
4024 ev_request_free(&request);
4031 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4033 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4035 ev_request_free(&request);
4041 void radius_event_free(void)
4044 * FIXME: Stop all threads, or at least check that
4045 * they're all waiting on the semaphore, and the queues
4051 * There are requests in the proxy hash that aren't
4052 * referenced from anywhere else. Remove them first.
4055 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4056 fr_packet_list_free(proxy_list);
4061 fr_packet_list_walk(pl, NULL, request_hash_cb);
4063 fr_packet_list_free(pl);
4066 fr_event_list_free(el);
4069 int radius_event_process(void)
4073 return fr_event_loop(el);
4076 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4078 request->options = RAD_REQUEST_OPTION_DEBUG2;
4080 if (request_pre_handler(request)) {
4081 rad_assert(fun != NULL);
4082 rad_assert(request != NULL);
4084 if (request->server) RDEBUG("server %s {",
4085 request->server != NULL ?
4086 request->server : "");
4089 if (request->server) RDEBUG("} # server %s",
4090 request->server != NULL ?
4091 request->server : "");
4093 request_post_handler(request);
4096 DEBUG2("Going to the next request");