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 char *debug_condition;
49 * Ridiculous amounts of local state.
51 static fr_event_list_t *el = NULL;
52 static fr_packet_list_t *pl = NULL;
53 static int request_num_counter = 0;
54 static struct timeval now;
56 static int have_children;
57 static int just_started = TRUE;
61 #define WITH_SELF_PIPE (1)
66 static int self_pipe[2];
71 static pthread_mutex_t proxy_mutex;
72 static rad_listen_t *proxy_listener_list = NULL;
73 static int proxy_no_new_sockets = FALSE;
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) {
147 tv->tv_sec += 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);
382 if (proxy_no_new_sockets) return 0;
385 * Also locks the proxy mutex, so we have to call
386 * it with the mutex unlocked. Some systems
387 * don't support recursive mutexes.
389 if (!proxy_new_listener(request->home_server, 0)) {
390 radlog(L_ERR, "Failed to create a new socket for proxying requests.");
393 request->proxy->src_port = 0; /* Use any new socket */
397 RDEBUG2("ERROR: Failed allocating Id for new socket when proxying requests.");
404 request->proxy_listener = proxy_listener;
406 PTHREAD_MUTEX_LOCK(&proxy_mutex);
407 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
408 fr_packet_list_id_free(proxy_list, request->proxy);
409 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
410 radlog(L_PROXY, "Failed to insert entry into proxy list");
414 request->in_proxy_hash = TRUE;
417 * Keep track of maximum outstanding requests to a
418 * particular home server. 'max_outstanding' is
419 * enforced in home_server_ldb(), in realms.c.
421 if (request->home_server) {
422 request->home_server->currently_outstanding++;
426 request->proxy_listener->count++;
429 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
431 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
432 inet_ntop(request->proxy->dst_ipaddr.af,
433 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
434 request->proxy->dst_port,
442 * Called as BOTH an event, and in-line from other functions.
444 static void wait_for_proxy_id_to_expire(void *ctx)
446 REQUEST *request = ctx;
448 rad_assert(request->magic == REQUEST_MAGIC);
449 rad_assert(request->proxy != NULL);
451 fr_event_now(el, &now);
452 request->when = request->proxy_when;
455 if (((request->proxy->code == PW_COA_REQUEST) ||
456 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
457 (request->packet->code != request->proxy->code)) {
458 request->when.tv_sec += request->home_server->coa_mrd;
461 request->when.tv_sec += request->home_server->response_window;
463 if ((request->num_proxied_requests == request->num_proxied_responses) ||
465 (request->home_server->proto == IPPROTO_TCP) ||
467 timercmp(&now, &request->when, >)) {
468 if (request->packet) {
469 RDEBUG2("Cleaning up request %u ID %d with timestamp +%d",
470 request->number, request->packet->id,
471 (unsigned int) (request->timestamp - fr_start_time));
473 RDEBUG2("Cleaning up request %u with timestamp +%d",
475 (unsigned int) (request->timestamp - fr_start_time));
478 ev_request_free(&request);
482 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
486 #ifdef HAVE_PTHREAD_H
487 static void wait_for_child_to_die(void *ctx)
489 REQUEST *request = ctx;
491 rad_assert(request->magic == REQUEST_MAGIC);
494 * If it's still queued (waiting for a thread to pick it
495 * up) OR, it's running AND there's still a child thread
496 * handling it, THEN delay some more.
498 if ((request->child_state == REQUEST_QUEUED) ||
499 ((request->child_state == REQUEST_RUNNING) &&
500 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0))) {
503 * Cap delay at five minutes.
505 if (request->delay < (USEC * 60 * 5)) {
506 request->delay += (request->delay >> 1);
507 radlog(L_INFO, "WARNING: Child is hung for request %u in component %s module %s.",
508 request->number, request->component, request->module);
510 RDEBUG2("Child is still stuck for request %u",
513 tv_add(&request->when, request->delay);
515 INSERT_EVENT(wait_for_child_to_die, request);
519 RDEBUG2("Child is finally responsive for request %u", request->number);
520 remove_from_request_hash(request);
523 if (request->proxy) {
524 wait_for_proxy_id_to_expire(request);
529 ev_request_free(&request);
533 static void cleanup_delay(void *ctx)
535 REQUEST *request = ctx;
537 rad_assert(request->magic == REQUEST_MAGIC);
538 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
539 (request->child_state == REQUEST_DONE));
541 remove_from_request_hash(request);
544 if (request->proxy && request->in_proxy_hash) {
545 wait_for_proxy_id_to_expire(request);
550 RDEBUG2("Cleaning up request %u ID %d with timestamp +%d",
551 request->number, request->packet->id,
552 (unsigned int) (request->timestamp - fr_start_time));
554 ev_request_free(&request);
559 * In daemon mode, AND this request has debug flags set.
561 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
563 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
567 const char *received, *from;
568 const fr_ipaddr_t *ip;
573 rad_assert(request->radlog != NULL);
575 if (direction == 0) {
576 received = "Received";
577 from = "from"; /* what else? */
578 ip = &packet->src_ipaddr;
579 port = packet->src_port;
582 received = "Sending";
583 from = "to"; /* hah! */
584 ip = &packet->dst_ipaddr;
585 port = packet->dst_port;
589 * Client-specific debugging re-prints the input
590 * packet into the client log.
592 * This really belongs in a utility library
594 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
595 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
596 received, fr_packet_codes[packet->code], from,
597 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
598 port, packet->id, packet->data_len);
600 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
602 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
604 packet->code, packet->id, packet->data_len);
607 for (vp = packet->vps; vp != NULL; vp = vp->next) {
608 vp_prints(buffer, sizeof(buffer), vp);
609 request->radlog(L_DBG, 0, request, "\t%s", buffer);
613 static void reject_delay(void *ctx)
615 REQUEST *request = ctx;
617 rad_assert(request->magic == REQUEST_MAGIC);
618 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
620 RDEBUG2("Sending delayed reject for request %u", request->number);
622 DEBUG_PACKET(request, request->reply, 1);
624 request->listener->send(request->listener, request);
626 request->when.tv_sec += request->root->cleanup_delay;
627 request->child_state = REQUEST_CLEANUP_DELAY;
629 INSERT_EVENT(cleanup_delay, request);
634 void revive_home_server(void *ctx)
636 home_server *home = ctx;
640 rad_assert(home->proto != IPPROTO_TCP);
643 home->state = HOME_STATE_ALIVE;
644 home->currently_outstanding = 0;
645 home->revive_time = now;
648 * Delete any outstanding events.
650 if (home->ev) fr_event_delete(el, &home->ev);
652 radlog(L_PROXY, "Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
653 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
654 buffer, sizeof(buffer)),
660 static void no_response_to_ping(void *ctx)
662 REQUEST *request = ctx;
666 rad_assert(request->home_server != NULL);
668 home = request->home_server;
670 rad_assert(home->proto != IPPROTO_TCP);
673 home->num_received_pings = 0;
675 radlog(L_ERR, "No response to status check %d for home server %s port %d",
677 inet_ntop(request->proxy->dst_ipaddr.af,
678 &request->proxy->dst_ipaddr.ipaddr,
679 buffer, sizeof(buffer)),
680 request->proxy->dst_port);
682 check_for_zombie_home_server(request);
684 wait_for_proxy_id_to_expire(request);
688 static void received_response_to_ping(REQUEST *request)
693 rad_assert(request->home_server != NULL);
695 home = request->home_server;
697 rad_assert(home->proto != IPPROTO_TCP);
700 home->num_received_pings++;
702 radlog(L_PROXY, "Received response to status check %d (%d in current sequence)",
703 request->number, home->num_received_pings);
706 * Remove the request from any hashes
708 fr_event_delete(el, &request->ev);
709 remove_from_proxy_hash(request);
710 rad_assert(request->in_request_hash == FALSE);
713 * The control socket may have marked the home server as
714 * alive. OR, it may have suddenly started responding to
715 * requests again. If so, don't re-do the "make alive"
718 if (home->state == HOME_STATE_ALIVE) return;
721 * We haven't received enough ping responses to mark it
722 * "alive". Wait a bit.
724 if (home->num_received_pings < home->num_pings_to_alive) {
728 home->state = HOME_STATE_ALIVE;
729 home->currently_outstanding = 0;
730 home->revive_time = now;
732 if (!fr_event_delete(el, &home->ev)) {
733 RDEBUG2("Hmm... no event for home server. Oh well.");
736 radlog(L_PROXY, "Marking home server %s port %d alive",
737 inet_ntop(request->proxy->dst_ipaddr.af,
738 &request->proxy->dst_ipaddr.ipaddr,
739 buffer, sizeof(buffer)),
740 request->proxy->dst_port);
745 * Called from start of zombie period, OR after control socket
746 * marks the home server dead.
748 static void ping_home_server(void *ctx)
751 home_server *home = ctx;
756 rad_assert(home->proto != IPPROTO_TCP);
759 if ((home->state == HOME_STATE_ALIVE) ||
760 (home->ping_check == HOME_PING_CHECK_NONE) ||
761 (home->ev != NULL)) {
765 request = request_alloc();
766 request->number = request_num_counter++;
768 request->proxy = rad_alloc(1);
769 rad_assert(request->proxy != NULL);
771 fr_event_now(el, &request->when);
772 home->when = request->when;
774 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
775 request->proxy->code = PW_STATUS_SERVER;
777 radius_pairmake(request, &request->proxy->vps,
778 "Message-Authenticator", "0x00", T_OP_SET);
780 } else if (home->type == HOME_TYPE_AUTH) {
781 request->proxy->code = PW_AUTHENTICATION_REQUEST;
783 radius_pairmake(request, &request->proxy->vps,
784 "User-Name", home->ping_user_name, T_OP_SET);
785 radius_pairmake(request, &request->proxy->vps,
786 "User-Password", home->ping_user_password, T_OP_SET);
787 radius_pairmake(request, &request->proxy->vps,
788 "Service-Type", "Authenticate-Only", T_OP_SET);
789 radius_pairmake(request, &request->proxy->vps,
790 "Message-Authenticator", "0x00", T_OP_SET);
793 #ifdef WITH_ACCOUNTING
794 request->proxy->code = PW_ACCOUNTING_REQUEST;
796 radius_pairmake(request, &request->proxy->vps,
797 "User-Name", home->ping_user_name, T_OP_SET);
798 radius_pairmake(request, &request->proxy->vps,
799 "Acct-Status-Type", "Stop", T_OP_SET);
800 radius_pairmake(request, &request->proxy->vps,
801 "Acct-Session-Id", "00000000", T_OP_SET);
802 vp = radius_pairmake(request, &request->proxy->vps,
803 "Event-Timestamp", "0", T_OP_SET);
804 vp->vp_date = now.tv_sec;
806 rad_assert("Internal sanity check failed");
810 radius_pairmake(request, &request->proxy->vps,
811 "NAS-Identifier", "Status Check. Are you alive?",
814 request->proxy->dst_ipaddr = home->ipaddr;
815 request->proxy->dst_port = home->port;
816 request->home_server = home;
818 rad_assert(request->proxy_listener == NULL);
820 if (!insert_into_proxy_hash(request)) {
821 radlog(L_PROXY, "Failed inserting status check %d into proxy hash. Discarding it.",
823 ev_request_free(&request);
826 rad_assert(request->proxy_listener != NULL);
827 request->proxy_listener->send(request->proxy_listener,
830 request->next_callback = NULL;
831 request->child_state = REQUEST_PROXIED;
832 request->when.tv_sec += home->ping_timeout;;
834 INSERT_EVENT(no_response_to_ping, request);
837 * Add +/- 2s of jitter, as suggested in RFC 3539
838 * and in the Issues and Fixes draft.
840 home->when.tv_sec += home->ping_interval - 2;
843 jitter ^= (jitter >> 10);
844 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
846 tv_add(&home->when, jitter);
848 INSERT_EVENT(ping_home_server, home);
852 void mark_home_server_dead(home_server *home, struct timeval *when)
854 int previous_state = home->state;
857 radlog(L_PROXY, "Marking home server %s port %d as dead.",
858 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
859 buffer, sizeof(buffer)),
862 home->state = HOME_STATE_IS_DEAD;
863 home->num_received_pings = 0;
865 if (home->ping_check != HOME_PING_CHECK_NONE) {
867 * If the control socket marks us dead, start
868 * pinging. Otherwise, we already started
869 * pinging when it was marked "zombie".
871 if (previous_state == HOME_STATE_ALIVE) {
872 ping_home_server(home);
877 * Revive it after a fixed period of time. This
878 * is very, very, bad.
881 home->when.tv_sec += home->revive_interval;
883 INSERT_EVENT(revive_home_server, home);
887 static void check_for_zombie_home_server(REQUEST *request)
892 home = request->home_server;
894 if (home->state != HOME_STATE_ZOMBIE) return;
896 when = home->zombie_period_start;
897 when.tv_sec += home->zombie_period;
899 fr_event_now(el, &now);
900 if (timercmp(&now, &when, <)) {
904 mark_home_server_dead(home, &request->when);
907 static int proxy_to_virtual_server(REQUEST *request);
909 static int virtual_server_handler(UNUSED REQUEST *request)
911 proxy_to_virtual_server(request);
915 static void proxy_fallback_handler(REQUEST *request)
918 * A proper time is required for wait_a_bit.
920 request->delay = USEC / 10;
921 gettimeofday(&now, NULL);
922 request->next_when = now;
923 tv_add(&request->next_when, request->delay);
924 request->next_callback = wait_a_bit;
927 * Re-queue the request.
929 request->child_state = REQUEST_QUEUED;
931 rad_assert(request->proxy != NULL);
932 if (!thread_pool_addrequest(request, virtual_server_handler)) {
933 request->child_state = REQUEST_DONE;
936 #ifdef HAVE_PTHREAD_H
938 * MAY free the request if we're over max_request_time,
939 * AND we're not in threaded mode!
941 * Note that we call this ONLY if we're threaded, as
942 * if we're NOT threaded, request_post_handler() calls
943 * wait_a_bit(), which means that "request" may not
946 if (have_children) wait_a_bit(request);
951 static int setup_post_proxy_fail(REQUEST *request)
953 DICT_VALUE *dval = NULL;
956 request->child_state = REQUEST_RUNNING;
958 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
959 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
961 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
962 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
966 * See no_response_to_coa_request
968 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
969 request->packet->code &= 0xff; /* restore it */
971 if (request->proxy->code == PW_COA_REQUEST) {
972 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
974 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
975 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
985 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
988 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
992 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
993 if (!vp) vp = radius_paircreate(request, &request->config_items,
994 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
995 vp->vp_integer = dval->value;
997 rad_assert(request->proxy_reply == NULL);
1003 static int null_handler(UNUSED REQUEST *request)
1008 static void post_proxy_fail_handler(REQUEST *request)
1011 * A proper time is required for wait_a_bit.
1013 request->delay = USEC / 10;
1014 gettimeofday(&now, NULL);
1017 * Not set up to run Post-Proxy-Type = Fail.
1019 * Mark the request as still running, and figure out what
1022 if (!setup_post_proxy_fail(request)) {
1023 request_post_handler(request);
1027 * Re-queue the request.
1029 request->child_state = REQUEST_QUEUED;
1032 * There is a post-proxy-type of fail. We run
1033 * the request through the pre/post proxy
1034 * handlers, just like it was a real proxied
1035 * request. However, we set the per-request
1036 * handler to NULL, as we don't want to do
1039 * Note that when we're not threaded, this will
1040 * process the request even if it's greater than
1041 * max_request_time. That's not fatal.
1043 request->priority = 0;
1044 rad_assert(request->proxy != NULL);
1045 thread_pool_addrequest(request, null_handler);
1049 * MAY free the request if we're over max_request_time,
1050 * AND we're not in threaded mode!
1052 * Note that we call this ONLY if we're threaded, as
1053 * if we're NOT threaded, request_post_handler() calls
1054 * wait_a_bit(), which means that "request" may not
1057 if (have_children) wait_a_bit(request);
1060 /* maybe check this against wait_for_proxy_id_to_expire? */
1061 static void no_response_to_proxied_request(void *ctx)
1063 REQUEST *request = ctx;
1067 rad_assert(request->magic == REQUEST_MAGIC);
1069 if (request->master_state == REQUEST_STOP_PROCESSING) {
1070 ev_request_free(&request);
1074 rad_assert(request->child_state == REQUEST_PROXIED);
1077 * If we've failed over to an internal home server,
1078 * replace the callback with the correct one. This
1079 * is due to locking issues with child threads...
1081 if (request->home_server->server) {
1082 wait_a_bit(request);
1087 if (request->home_server->proto != IPPROTO_TCP)
1089 check_for_zombie_home_server(request);
1091 home = request->home_server;
1094 * The default as of 2.1.7 is to allow requests to
1095 * fail-over to a backup home server when this one does
1096 * not respond. The old behavior can be configured as
1099 if (home->no_response_fail) {
1100 radlog(L_ERR, "Rejecting request %u (proxy Id %d) due to lack of any response from home server %s port %d",
1101 request->number, request->proxy->id,
1102 inet_ntop(request->proxy->dst_ipaddr.af,
1103 &request->proxy->dst_ipaddr.ipaddr,
1104 buffer, sizeof(buffer)),
1105 request->proxy->dst_port);
1107 post_proxy_fail_handler(request);
1110 * Enforce max_request_time.
1112 * We fail over to another backup home server
1113 * when the client re-transmits the request. If
1114 * the client doesn't re-transmit, no fail-over
1117 rad_assert(request->ev == NULL);
1118 request->child_state = REQUEST_RUNNING;
1119 wait_a_bit(request);
1123 * Don't touch request due to race conditions
1128 * Do nothing more. The home server didn't respond,
1129 * but that isn't a catastrophic failure. Some home
1130 * servers don't respond to packets...
1132 if (home->proto == IPPROTO_TCP) {
1134 * FIXME: Set up TCP pinging on this connection.
1136 * Maybe the CONNECTION is dead, but the home
1137 * server is alive. In that case, we need to start
1138 * pinging on the connection.
1140 * This means doing the pinging BEFORE the
1141 * post_proxy_fail_handler above, as it may do
1142 * something with the request, and cause the
1143 * proxy listener to go away!
1149 if (home->state == HOME_STATE_IS_DEAD) {
1150 rad_assert(home->ev != NULL); /* or it will never wake up */
1155 * Enable the zombie period when we notice that the home
1156 * server hasn't responded. We do NOT back-date the start
1157 * of the zombie period.
1159 if (home->state == HOME_STATE_ALIVE) {
1160 home->state = HOME_STATE_ZOMBIE;
1161 home->zombie_period_start = now;
1162 fr_event_delete(el, &home->ev);
1163 home->currently_outstanding = 0;
1164 home->num_received_pings = 0;
1166 radlog(L_PROXY, "Marking home server %s port %d as zombie (it looks like it is dead).",
1167 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1168 buffer, sizeof(buffer)),
1172 * Start pinging the home server.
1174 ping_home_server(home);
1179 static void wait_a_bit(void *ctx)
1181 struct timeval when;
1182 REQUEST *request = ctx;
1183 fr_event_callback_t callback = NULL;
1185 rad_assert(request->magic == REQUEST_MAGIC);
1188 * The socket was closed. Tell the request that
1189 * there is no point in continuing.
1191 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1192 goto stop_processing;
1197 * The CoA request is a new (internally generated)
1198 * request, created in a child thread. We therefore need
1199 * some way to tie its events back into the main event
1202 if (request->coa && !request->coa->proxy_reply &&
1203 request->coa->next_callback) {
1204 request->coa->when = request->coa->next_when;
1205 INSERT_EVENT(request->coa->next_callback, request->coa);
1206 request->coa->next_callback = NULL;
1207 request->coa->parent = NULL;
1208 request->coa = NULL;
1212 switch (request->child_state) {
1213 case REQUEST_QUEUED:
1214 case REQUEST_RUNNING:
1215 when = request->received;
1216 when.tv_sec += request->root->max_request_time;
1219 * Normally called from the event loop with the
1220 * proper event loop time. Otherwise, called from
1221 * post proxy fail handler, which sets "now", and
1222 * this call won't re-set it, because we're not
1223 * in the event loop.
1225 fr_event_now(el, &now);
1228 * Request still has more time. Continue
1231 if (timercmp(&now, &when, <) ||
1232 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1233 (request->child_state == REQUEST_QUEUED))) {
1234 if (request->delay < (USEC / 10)) {
1235 request->delay = USEC / 10;
1237 request->delay += request->delay >> 1;
1241 * Cap wait at some sane value for detail
1244 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1245 (request->delay > (request->root->max_request_time * USEC))) {
1246 request->delay = request->root->max_request_time * USEC;
1250 request->when = now;
1251 tv_add(&request->when, request->delay);
1252 callback = wait_a_bit;
1256 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1258 * A child thread MAY still be running on the
1259 * request. Ask the thread to stop working on
1262 if (have_children &&
1263 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1264 request->master_state = REQUEST_STOP_PROCESSING;
1266 radlog(L_ERR, "WARNING: Unresponsive child for request %u, in module %s component %s",
1268 request->module ? request->module : "<server core>",
1269 request->component ? request->component : "<server core>");
1271 request->delay = USEC / 4;
1272 tv_add(&request->when, request->delay);
1273 callback = wait_for_child_to_die;
1279 * Else no child thread is processing the
1280 * request. We probably should have just marked
1281 * the request as 'done' elsewhere, like in the
1282 * post-proxy-fail handler. But doing that would
1283 * involve checking for max_request_time in
1284 * multiple places, so this may be simplest.
1286 request->child_state = REQUEST_DONE;
1290 * Mark the request as no longer running,
1294 #ifdef HAVE_PTHREAD_H
1295 request->child_pid = NO_SUCH_CHILD_PID;
1300 * This is a CoA request. It's been divorced
1301 * from everything else, so we clean it up now.
1303 if (!request->in_request_hash &&
1305 (request->packet->code != request->proxy->code) &&
1306 ((request->proxy->code == PW_COA_REQUEST) ||
1307 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1309 * FIXME: Do CoA MIBs
1311 ev_request_free(&request);
1315 request_stats_final(request);
1316 cleanup_delay(request);
1319 case REQUEST_REJECT_DELAY:
1320 case REQUEST_CLEANUP_DELAY:
1321 #ifdef HAVE_PTHREAD_H
1322 request->child_pid = NO_SUCH_CHILD_PID;
1324 request_stats_final(request);
1326 case REQUEST_PROXIED:
1327 rad_assert(request->next_callback != NULL);
1328 rad_assert(request->next_callback != wait_a_bit);
1330 request->when = request->next_when;
1331 callback = request->next_callback;
1332 request->next_callback = NULL;
1336 rad_panic("Internal sanity check failure");
1341 * Something major went wrong. Discard the request, and
1344 * FIXME: No idea why this happens or how to fix it...
1345 * It seems to happen *only* when requests are proxied,
1346 * and where the home server doesn't respond. So it looks
1347 * like a race condition above, but it happens in debug
1348 * mode, with no threads...
1351 RDEBUG("WARNING: Internal sanity check failed in event handler for request %u: Discarding the request!", request->number);
1352 ev_request_free(&request);
1356 INSERT_EVENT(callback, request);
1360 static void no_response_to_coa_request(void *ctx)
1362 REQUEST *request = ctx;
1365 rad_assert(request->magic == REQUEST_MAGIC);
1366 rad_assert(request->child_state == REQUEST_PROXIED);
1367 rad_assert(request->home_server != NULL);
1368 rad_assert(!request->in_request_hash);
1370 radlog(L_ERR, "No response to CoA request sent to %s",
1371 inet_ntop(request->proxy->dst_ipaddr.af,
1372 &request->proxy->dst_ipaddr.ipaddr,
1373 buffer, sizeof(buffer)));
1378 request->packet->code |= (PW_COA_REQUEST << 8);
1379 post_proxy_fail_handler(request);
1383 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1387 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1394 packet->data = NULL;
1395 packet->data_len = 0;
1398 return 1; /* time stamp updated */
1403 * Called when we haven't received a response to a CoA request.
1405 static void retransmit_coa_request(void *ctx)
1409 REQUEST *request = ctx;
1411 rad_assert(request->magic == REQUEST_MAGIC);
1412 rad_assert(request->child_state == REQUEST_PROXIED);
1413 rad_assert(request->home_server != NULL);
1414 rad_assert(!request->in_request_hash);
1415 rad_assert(request->parent == NULL);
1417 fr_event_now(el, &now);
1420 * Cap count at MRC, if it is non-zero.
1422 if (request->home_server->coa_mrc &&
1423 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1424 no_response_to_coa_request(request);
1429 * RFC 5080 Section 2.2.1
1431 * RT = 2*RTprev + RAND*RTprev
1432 * = 1.9 * RTprev + rand(0,.2) * RTprev
1433 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1436 delay ^= (delay >> 16);
1438 frac = request->delay / 5;
1439 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1441 delay += (2 * request->delay) - (request->delay / 10);
1444 * Cap delay at MRT, if MRT is non-zero.
1446 if (request->home_server->coa_mrt &&
1447 (delay > (request->home_server->coa_mrt * USEC))) {
1448 int mrt_usec = request->home_server->coa_mrt * USEC;
1451 * delay = MRT + RAND * MRT
1452 * = 0.9 MRT + rand(0,.2) * MRT
1455 delay ^= (delay >> 15);
1457 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1458 delay += mrt_usec - (mrt_usec / 10);
1461 request->delay = delay;
1462 request->when = now;
1463 tv_add(&request->when, request->delay);
1464 mrd = request->proxy_when;
1465 mrd.tv_sec += request->home_server->coa_mrd;
1468 * Cap duration at MRD.
1470 if (timercmp(&mrd, &request->when, <)) {
1471 request->when = mrd;
1472 INSERT_EVENT(no_response_to_coa_request, request);
1475 INSERT_EVENT(retransmit_coa_request, request);
1478 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1480 * Keep a copy of the old Id so that the
1481 * re-transmitted request doesn't re-use the old
1484 RADIUS_PACKET old = *request->proxy;
1487 * Don't free the old Id on error.
1489 if (!insert_into_proxy_hash(request)) {
1490 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1495 * Now that we have a new Id, free the old one.
1497 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1498 fr_packet_list_yank(proxy_list, &old);
1499 fr_packet_list_id_free(proxy_list, &old);
1500 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1502 request->num_proxied_requests = 0;
1503 request->num_proxied_responses = 0;
1506 request->num_proxied_requests++;
1507 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1509 request->proxy_listener->send(request->proxy_listener,
1515 * The original request is either DONE, or in CLEANUP_DELAY.
1517 static int originated_coa_request(REQUEST *request)
1519 int delay, rcode, pre_proxy_type = 0;
1525 rad_assert(request->proxy == NULL);
1526 rad_assert(!request->in_proxy_hash);
1527 rad_assert(request->proxy_reply == NULL);
1530 * Check whether we want to originate one, or cancel one.
1532 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1533 if (!vp && request->coa) {
1534 vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1538 if (vp->vp_integer == 0) {
1539 ev_request_free(&request->coa);
1540 return 1; /* success */
1544 if (!request->coa) request_alloc_coa(request);
1545 if (!request->coa) return 0;
1550 * src_ipaddr will be set up in proxy_encode.
1552 memset(&ipaddr, 0, sizeof(ipaddr));
1553 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1555 ipaddr.af = AF_INET;
1556 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1558 } else if ((vp = pairfind(coa->proxy->vps,
1559 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1560 ipaddr.af = AF_INET6;
1561 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1563 } else if ((vp = pairfind(coa->proxy->vps,
1564 PW_HOME_SERVER_POOL)) != NULL) {
1565 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1567 if (!coa->home_pool) {
1568 RDEBUG2("WARNING: No such home_server_pool %s",
1571 ev_request_free(&request->coa);
1578 } else if (request->client->coa_pool) {
1579 coa->home_pool = request->client->coa_pool;
1581 } else if (request->client->coa_server) {
1582 coa->home_server = request->client->coa_server;
1586 * If all else fails, send it to the client that
1587 * originated this request.
1589 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1593 * Use the pool, if it exists.
1595 if (coa->home_pool) {
1596 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1597 if (!coa->home_server) {
1598 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1602 } else if (!coa->home_server) {
1603 int port = PW_COA_UDP_PORT;
1605 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1606 if (vp) port = vp->vp_integer;
1608 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1609 if (!coa->home_server) {
1610 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1611 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1612 buffer, sizeof(buffer)), port);
1617 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1619 switch (vp->vp_integer) {
1620 case PW_COA_REQUEST:
1621 case PW_DISCONNECT_REQUEST:
1622 coa->proxy->code = vp->vp_integer;
1626 DEBUG("Cannot set CoA Packet-Type to code %d",
1632 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1635 * The rest of the server code assumes that
1636 * request->packet && request->reply exist. Copy them
1637 * from the original request.
1639 rad_assert(coa->packet != NULL);
1640 rad_assert(coa->packet->vps == NULL);
1641 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1642 coa->packet->vps = paircopy(request->packet->vps);
1643 coa->packet->data = NULL;
1644 rad_assert(coa->reply != NULL);
1645 rad_assert(coa->reply->vps == NULL);
1646 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1647 coa->reply->vps = paircopy(request->reply->vps);
1648 coa->reply->data = NULL;
1649 coa->config_items = paircopy(request->config_items);
1652 * Call the pre-proxy routines.
1654 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1656 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1657 pre_proxy_type = vp->vp_integer;
1660 if (coa->home_pool && coa->home_pool->virtual_server) {
1661 const char *old_server = coa->server;
1663 coa->server = coa->home_pool->virtual_server;
1664 RDEBUG2(" server %s {", coa->server);
1665 rcode = module_pre_proxy(pre_proxy_type, coa);
1667 coa->server = old_server;
1669 rcode = module_pre_proxy(pre_proxy_type, coa);
1676 * Only send the CoA packet if the pre-proxy code succeeded.
1678 case RLM_MODULE_NOOP:
1680 case RLM_MODULE_UPDATED:
1685 * Source IP / port is set when the proxy socket
1688 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1689 coa->proxy->dst_port = coa->home_server->port;
1691 if (!insert_into_proxy_hash(coa)) {
1692 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1697 * We CANNOT divorce the CoA request from the parent
1698 * request. This function is running in a child thread,
1699 * and we need access to the main event loop in order to
1700 * to add the timers for the CoA packet. See
1705 * Forget about the original request completely at this
1710 gettimeofday(&request->proxy_when, NULL);
1711 request->received = request->next_when = request->proxy_when;
1712 rad_assert(request->proxy_reply == NULL);
1715 * Implement re-transmit algorithm as per RFC 5080
1718 * We want IRT + RAND*IRT
1719 * or 0.9 IRT + rand(0,.2) IRT
1721 * 2^20 ~ USEC, and we want 2.
1722 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1724 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1725 request->delay = delay * request->home_server->coa_irt;
1726 delay = request->home_server->coa_irt * USEC;
1727 delay -= delay / 10;
1728 delay += request->delay;
1730 request->delay = delay;
1731 tv_add(&request->next_when, delay);
1732 request->next_callback = retransmit_coa_request;
1735 * Note that we set proxied BEFORE sending the packet.
1737 * Once we send it, the request is tainted, as
1738 * another thread may have picked it up. Don't
1741 request->num_proxied_requests = 1;
1742 request->num_proxied_responses = 0;
1743 request->child_pid = NO_SUCH_CHILD_PID;
1745 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1747 request->child_state = REQUEST_PROXIED;
1749 DEBUG_PACKET(request, request->proxy, 1);
1751 request->proxy_listener->send(request->proxy_listener,
1755 #endif /* WITH_COA */
1758 static int process_proxy_reply(REQUEST *request)
1761 int post_proxy_type = 0;
1765 * Delete any reply we had accumulated until now.
1767 pairfree(&request->reply->vps);
1770 * Run the packet through the post-proxy stage,
1771 * BEFORE playing games with the attributes.
1773 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1775 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1776 post_proxy_type = vp->vp_integer;
1779 if (request->home_pool && request->home_pool->virtual_server) {
1780 const char *old_server = request->server;
1782 request->server = request->home_pool->virtual_server;
1783 RDEBUG2(" server %s {", request->server);
1784 rcode = module_post_proxy(post_proxy_type, request);
1786 request->server = old_server;
1788 rcode = module_post_proxy(post_proxy_type, request);
1792 if (request->packet->code == request->proxy->code)
1794 * Don't run the next bit if we originated a CoA
1795 * packet, after receiving an Access-Request or
1796 * Accounting-Request.
1801 * There may NOT be a proxy reply, as we may be
1802 * running Post-Proxy-Type = Fail.
1804 if (request->proxy_reply) {
1806 * Delete the Proxy-State Attributes from
1807 * the reply. These include Proxy-State
1808 * attributes from us and remote server.
1810 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1813 * Add the attributes left in the proxy
1814 * reply to the reply list.
1816 pairadd(&request->reply->vps, request->proxy_reply->vps);
1817 request->proxy_reply->vps = NULL;
1820 * Free proxy request pairs.
1822 pairfree(&request->proxy->vps);
1826 default: /* Don't do anything */
1828 case RLM_MODULE_FAIL:
1829 /* FIXME: debug print stuff */
1830 request->child_state = REQUEST_DONE;
1833 case RLM_MODULE_HANDLED:
1834 /* FIXME: debug print stuff */
1835 request->child_state = REQUEST_DONE;
1843 static int request_pre_handler(REQUEST *request)
1847 rad_assert(request->magic == REQUEST_MAGIC);
1848 rad_assert(request->packet != NULL);
1850 request->child_state = REQUEST_RUNNING;
1853 * Don't decode the packet if it's an internal "fake"
1854 * request. Instead, just return so that the caller can
1857 if (request->packet->dst_port == 0) {
1858 request->username = pairfind(request->packet->vps,
1860 request->password = pairfind(request->packet->vps,
1867 * Put the decoded packet into it's proper place.
1869 if (request->proxy_reply != NULL) {
1871 * FIXME: For now, we can only proxy RADIUS packets.
1873 * In order to proxy other packets, we need to
1874 * somehow cache the "decode" function.
1876 rcode = rad_decode(request->proxy_reply, request->proxy,
1877 request->home_server->secret);
1878 DEBUG_PACKET(request, request->proxy_reply, 0);
1881 if (request->packet->vps == NULL) {
1882 rcode = request->listener->decode(request->listener, request);
1884 if (debug_condition) {
1886 const char *my_debug = debug_condition;
1889 * Ignore parse errors.
1891 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1895 request->options = 2;
1896 request->radlog = radlog_request;
1900 DEBUG_PACKET(request, request->packet, 0);
1906 RDEBUG("%s Dropping packet without response.", fr_strerror());
1907 request->reply->offset = -2; /* bad authenticator */
1908 request->child_state = REQUEST_DONE;
1912 if (!request->username) {
1913 request->username = pairfind(request->packet->vps,
1918 if (request->proxy) {
1919 return process_proxy_reply(request);
1929 * Do state handling when we proxy a request.
1931 static int proxy_request(REQUEST *request)
1933 struct timeval when;
1938 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
1939 ev_request_free(&request->coa);
1943 if (request->home_server->server) {
1944 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1948 if (!insert_into_proxy_hash(request)) {
1949 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1953 request->proxy_listener->encode(request->proxy_listener, request);
1955 when = request->received;
1956 when.tv_sec += request->root->max_request_time;
1958 gettimeofday(&request->proxy_when, NULL);
1960 request->next_when = request->proxy_when;
1961 request->next_when.tv_sec += request->home_server->response_window;
1963 rad_assert(request->home_server->response_window > 0);
1965 if (timercmp(&when, &request->next_when, <)) {
1966 request->next_when = when;
1968 request->next_callback = no_response_to_proxied_request;
1970 RDEBUG2("Proxying request %u to home server %s port %d",
1972 inet_ntop(request->proxy->dst_ipaddr.af,
1973 &request->proxy->dst_ipaddr.ipaddr,
1974 buffer, sizeof(buffer)),
1975 request->proxy->dst_port);
1978 * Note that we set proxied BEFORE sending the packet.
1980 * Once we send it, the request is tainted, as
1981 * another thread may have picked it up. Don't
1984 request->num_proxied_requests = 1;
1985 request->num_proxied_responses = 0;
1986 #ifdef HAVE_PTHREAD_H
1987 request->child_pid = NO_SUCH_CHILD_PID;
1989 request->child_state = REQUEST_PROXIED;
1991 DEBUG_PACKET(request, request->proxy, 1);
1993 request->proxy_listener->send(request->proxy_listener,
2000 * "Proxy" the request by sending it to a new virtual server.
2002 static int proxy_to_virtual_server(REQUEST *request)
2005 RAD_REQUEST_FUNP fun;
2007 if (!request->home_server || !request->home_server->server) return 0;
2009 if (request->parent) {
2010 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
2014 fake = request_alloc_fake(request);
2016 RDEBUG2("WARNING: Out of memory");
2020 fake->packet->vps = paircopy(request->proxy->vps);
2021 fake->server = request->home_server->server;
2023 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2024 fun = rad_authenticate;
2026 #ifdef WITH_ACCOUNTING
2027 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2028 fun = rad_accounting;
2032 RDEBUG2("Unknown packet type %d", request->proxy->code);
2033 ev_request_free(&fake);
2037 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2038 radius_handle_request(fake, fun);
2039 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2041 if (fake->reply->code != 0) {
2042 request->proxy_reply = fake->reply;
2046 * There was no response
2048 setup_post_proxy_fail(request);
2051 ev_request_free(&fake);
2053 process_proxy_reply(request);
2056 * Process it through the normal section again, but ONLY
2057 * if we received a proxy reply..
2059 if (request->proxy_reply) {
2060 if (request->server) RDEBUG("server %s {",
2061 request->server != NULL ?
2062 request->server : "");
2065 if (request->server) RDEBUG("} # server %s",
2066 request->server != NULL ?
2067 request->server : "");
2070 return 2; /* success, but NOT '1' !*/
2074 * Return 1 if we did proxy it, or the proxy attempt failed
2075 * completely. Either way, the caller doesn't touch the request
2076 * any more if we return 1.
2078 static int successfully_proxied_request(REQUEST *request)
2081 int pre_proxy_type = 0;
2082 VALUE_PAIR *realmpair;
2083 VALUE_PAIR *strippedname;
2085 char *realmname = NULL;
2087 REALM *realm = NULL;
2091 * If it was already proxied, do nothing.
2093 * FIXME: This should really be a serious error.
2095 if (request->in_proxy_hash ||
2096 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2100 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2101 if (!realmpair || (realmpair->length == 0)) {
2104 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2107 switch (request->packet->code) {
2108 case PW_AUTHENTICATION_REQUEST:
2109 pool_type = HOME_TYPE_AUTH;
2112 #ifdef WITH_ACCOUNTING
2113 case PW_ACCOUNTING_REQUEST:
2114 pool_type = HOME_TYPE_ACCT;
2119 case PW_COA_REQUEST:
2120 case PW_DISCONNECT_REQUEST:
2121 pool_type = HOME_TYPE_COA;
2129 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2131 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2136 realmname = NULL; /* no realms */
2141 realmname = (char *) realmpair->vp_strvalue;
2143 realm = realm_find2(realmname);
2145 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2150 * Figure out which pool to use.
2152 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2153 pool = realm->auth_pool;
2155 #ifdef WITH_ACCOUNTING
2156 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2157 pool = realm->acct_pool;
2161 } else if ((request->packet->code == PW_COA_REQUEST) ||
2162 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2163 pool = realm->acct_pool;
2167 rad_panic("Internal sanity check failed");
2171 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2177 home = home_server_ldb(realmname, pool, request);
2179 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2183 request->home_pool = pool;
2187 * Once we've decided to proxy a request, we cannot send
2188 * a CoA packet. So we free up any CoA packet here.
2190 ev_request_free(&request->coa);
2193 * Remember that we sent the request to a Realm.
2195 if (realmname) pairadd(&request->packet->vps,
2196 pairmake("Realm", realmname, T_OP_EQ));
2199 * Strip the name, if told to.
2201 * Doing it here catches the case of proxied tunneled
2204 if (realm && (realm->striprealm == TRUE) &&
2205 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2207 * If there's a Stripped-User-Name attribute in
2208 * the request, then use THAT as the User-Name
2209 * for the proxied request, instead of the
2212 * This is done by making a copy of the
2213 * Stripped-User-Name attribute, turning it into
2214 * a User-Name attribute, deleting the
2215 * Stripped-User-Name and User-Name attributes
2216 * from the vps list, and making the new
2217 * User-Name the head of the vps list.
2219 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2221 vp = radius_paircreate(request, NULL,
2222 PW_USER_NAME, PW_TYPE_STRING);
2223 rad_assert(vp != NULL); /* handled by above function */
2224 /* Insert at the START of the list */
2225 vp->next = request->proxy->vps;
2226 request->proxy->vps = vp;
2228 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2229 sizeof(vp->vp_strvalue));
2230 vp->length = strippedname->length;
2233 * Do NOT delete Stripped-User-Name.
2238 * If there is no PW_CHAP_CHALLENGE attribute but
2239 * there is a PW_CHAP_PASSWORD we need to add it
2240 * since we can't use the request authenticator
2241 * anymore - we changed it.
2243 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2244 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2245 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2246 vp = radius_paircreate(request, &request->proxy->vps,
2247 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2248 vp->length = AUTH_VECTOR_LEN;
2249 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2253 * The RFC's say we have to do this, but FreeRADIUS
2256 vp = radius_paircreate(request, &request->proxy->vps,
2257 PW_PROXY_STATE, PW_TYPE_OCTETS);
2258 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2259 request->packet->id);
2260 vp->length = strlen(vp->vp_strvalue);
2263 * Should be done BEFORE inserting into proxy hash, as
2264 * pre-proxy may use this information, or change it.
2266 request->proxy->code = request->packet->code;
2269 * Call the pre-proxy routines.
2271 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2273 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2274 pre_proxy_type = vp->vp_integer;
2277 rad_assert(request->home_pool != NULL);
2279 if (request->home_pool->virtual_server) {
2280 const char *old_server = request->server;
2282 request->server = request->home_pool->virtual_server;
2283 RDEBUG2(" server %s {", request->server);
2284 rcode = module_pre_proxy(pre_proxy_type, request);
2286 request->server = old_server;
2288 rcode = module_pre_proxy(pre_proxy_type, request);
2291 case RLM_MODULE_FAIL:
2292 case RLM_MODULE_INVALID:
2293 case RLM_MODULE_NOTFOUND:
2294 case RLM_MODULE_USERLOCK:
2296 /* FIXME: debug print failed stuff */
2299 case RLM_MODULE_REJECT:
2300 case RLM_MODULE_HANDLED:
2304 * Only proxy the packet if the pre-proxy code succeeded.
2306 case RLM_MODULE_NOOP:
2308 case RLM_MODULE_UPDATED:
2313 * If it's a fake request, don't send the proxy
2314 * packet. The outer tunnel session will take
2315 * care of doing that.
2317 if (request->packet->dst_port == 0) {
2318 request->home_server = NULL;
2322 if (request->home_server->server) {
2323 return proxy_to_virtual_server(request);
2326 if (!proxy_request(request)) {
2327 RDEBUG("ERROR: Failed to proxy request %u", request->number);
2335 static void request_post_handler(REQUEST *request)
2337 int child_state = -1;
2338 struct timeval when;
2341 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2343 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2344 RDEBUG2("request %u was cancelled.", request->number);
2345 #ifdef HAVE_PTHREAD_H
2346 request->child_pid = NO_SUCH_CHILD_PID;
2348 child_state = REQUEST_DONE;
2352 if (request->child_state != REQUEST_RUNNING) {
2353 rad_panic("Internal sanity check failed");
2358 * If it's not in the request hash, it's a CoA request.
2361 if (!request->in_request_hash &&
2363 ((request->proxy->code == PW_COA_REQUEST) ||
2364 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2365 request->next_callback = NULL;
2366 child_state = REQUEST_DONE;
2372 * Catch Auth-Type := Reject BEFORE proxying the packet.
2374 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2375 (request->reply->code == 0) &&
2376 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2377 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2378 request->reply->code = PW_AUTHENTICATION_REJECT;
2382 if (request->root->proxy_requests &&
2383 !request->in_proxy_hash &&
2384 (request->reply->code == 0) &&
2385 (request->packet->dst_port != 0) &&
2386 (request->packet->code != PW_STATUS_SERVER)) {
2387 int rcode = successfully_proxied_request(request);
2389 if (rcode == 1) return; /* request is invalid */
2392 * Failed proxying it (dead home servers, etc.)
2393 * Run it through Post-Proxy-Type = Fail, and
2394 * respond to the request.
2396 * Note that we're in a child thread here, so we
2397 * do NOT re-schedule the request. Instead, we
2398 * do what we would have done, which is run the
2399 * pre-handler, a NULL request handler, and then
2402 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2403 request_pre_handler(request);
2407 * Else we weren't supposed to proxy it,
2408 * OR we proxied it internally to a virutal server.
2413 else if (request->proxy && request->coa) {
2414 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
2415 ev_request_free(&request->coa);
2421 * Fake requests don't get encoded or signed. The caller
2422 * also requires the reply VP's, so we don't free them
2425 if (request->packet->dst_port == 0) {
2426 /* FIXME: RDEBUG going to the next request */
2427 #ifdef HAVE_PTHREAD_H
2428 request->child_pid = NO_SUCH_CHILD_PID;
2430 request->child_state = REQUEST_DONE;
2436 * Copy Proxy-State from the request to the reply.
2438 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2439 if (vp) pairadd(&request->reply->vps, vp);
2443 * Access-Requests get delayed or cached.
2445 switch (request->packet->code) {
2446 case PW_AUTHENTICATION_REQUEST:
2447 gettimeofday(&request->next_when, NULL);
2449 if (request->reply->code == 0) {
2451 * Check if the lack of response is intentional.
2453 vp = pairfind(request->config_items,
2454 PW_RESPONSE_PACKET_TYPE);
2456 RDEBUG2("There was no response configured: rejecting request %u",
2458 request->reply->code = PW_AUTHENTICATION_REJECT;
2460 } else if (vp->vp_integer == 256) {
2461 RDEBUG2("Not responding to request %u",
2465 * Force cleanup after a long
2466 * time, so that we don't
2467 * re-process the packet.
2469 request->next_when.tv_sec += request->root->max_request_time;
2470 request->next_callback = cleanup_delay;
2471 child_state = REQUEST_CLEANUP_DELAY;
2474 request->reply->code = vp->vp_integer;
2480 * Run rejected packets through
2482 * Post-Auth-Type = Reject
2484 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2485 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2486 vp = radius_pairmake(request, &request->config_items,
2487 "Post-Auth-Type", "Reject",
2489 if (vp) rad_postauth(request);
2492 * If configured, delay Access-Reject packets.
2494 * If request->root->reject_delay = 0, we discover
2495 * that we have to send the packet now.
2497 when = request->received;
2498 when.tv_sec += request->root->reject_delay;
2500 if (timercmp(&when, &request->next_when, >)) {
2501 RDEBUG2("Delaying reject of request %u for %d seconds",
2503 request->root->reject_delay);
2504 request->next_when = when;
2505 request->next_callback = reject_delay;
2506 #ifdef HAVE_PTHREAD_H
2507 request->child_pid = NO_SUCH_CHILD_PID;
2509 request->child_state = REQUEST_REJECT_DELAY;
2515 case PW_COA_REQUEST:
2516 case PW_DISCONNECT_REQUEST:
2518 request->next_when.tv_sec += request->root->cleanup_delay;
2519 request->next_callback = cleanup_delay;
2520 child_state = REQUEST_CLEANUP_DELAY;
2523 case PW_ACCOUNTING_REQUEST:
2524 request->next_callback = NULL; /* just to be safe */
2525 child_state = REQUEST_DONE;
2529 * FIXME: Status-Server should probably not be
2532 case PW_STATUS_SERVER:
2533 request->next_callback = NULL;
2534 child_state = REQUEST_DONE;
2541 request->next_callback = NULL;
2542 child_state = REQUEST_DONE;
2547 * Suppress "no reply" packets here, unless we're reading
2548 * from the "detail" file. In that case, we've got to
2549 * tell the detail file handler that the request is dead,
2550 * and it should re-send it.
2551 * If configured, encode, sign, and send.
2553 if ((request->reply->code != 0) ||
2554 (request->listener->type == RAD_LISTEN_DETAIL)) {
2555 DEBUG_PACKET(request, request->reply, 1);
2556 request->listener->send(request->listener, request);
2561 * Now that we've completely processed the request,
2562 * see if we need to originate a CoA request. But ONLY
2563 * if it wasn't proxied.
2565 if (!request->proxy &&
2567 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL))) {
2568 if (!originated_coa_request(request)) {
2569 RDEBUG2("Do CoA Fail handler here");
2571 /* request->coa is stil set, so we can update events */
2577 * Clean up. These are no longer needed.
2579 pairfree(&request->config_items);
2581 pairfree(&request->packet->vps);
2582 request->username = NULL;
2583 request->password = NULL;
2585 pairfree(&request->reply->vps);
2588 if (request->proxy) {
2589 pairfree(&request->proxy->vps);
2591 if (request->proxy_reply) {
2592 pairfree(&request->proxy_reply->vps);
2597 * We're not tracking responses from the home
2598 * server, we can therefore free this memory in
2601 if (!request->in_proxy_hash) {
2602 rad_free(&request->proxy);
2603 rad_free(&request->proxy_reply);
2604 request->home_server = NULL;
2610 RDEBUG2("Finished request %u.", request->number);
2611 rad_assert(child_state >= 0);
2612 request->child_state = child_state;
2615 * Single threaded mode: update timers now.
2617 if (!have_children) wait_a_bit(request);
2621 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2627 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2628 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2630 switch (request->child_state) {
2631 case REQUEST_QUEUED:
2632 case REQUEST_RUNNING:
2636 radlog(L_ERR, "Discarding duplicate request from "
2637 "client %s port %d - ID: %d due to unfinished request %u",
2639 request->packet->src_port,request->packet->id,
2644 case REQUEST_PROXIED:
2646 * We're not supposed to have duplicate
2647 * accounting packets. The other states handle
2648 * duplicates fine (discard, or send duplicate
2649 * reply). But we do NOT want to retransmit an
2650 * accounting request here, because that would
2651 * involve updating the Acct-Delay-Time, and
2652 * therefore changing the packet Id, etc.
2654 * Instead, we just discard the packet. We may
2655 * eventually respond, or the client will send a
2656 * new accounting packet.
2658 * The same comments go for Status-Server, and
2659 * other packet types.
2661 * FIXME: coa: when we proxy CoA && Disconnect
2662 * packets, this logic has to be fixed.
2664 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2668 check_for_zombie_home_server(request);
2671 * If we've just discovered that the home server
2672 * is dead, OR the socket has been closed, look for
2673 * another connection to a home server.
2675 if (((request->packet->dst_port != 0) &&
2676 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2677 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2680 remove_from_proxy_hash(request);
2682 home = home_server_ldb(NULL, request->home_pool, request);
2684 RDEBUG2("Failed to find live home server for request %u", request->number);
2687 * Do post-request processing,
2688 * and any insertion of necessary
2691 post_proxy_fail_handler(request);
2695 request->proxy->code = request->packet->code;
2698 * Free the old packet, to force re-encoding
2700 free(request->proxy->data);
2701 request->proxy->data = NULL;
2702 request->proxy->data_len = 0;
2705 * This request failed over to a virtual
2706 * server. Push it back onto the queue
2709 if (request->home_server->server) {
2710 proxy_fallback_handler(request);
2715 * Try to proxy the request.
2717 if (!proxy_request(request)) {
2718 RDEBUG("ERROR: Failed to re-proxy request %u", request->number);
2719 goto no_home_servers;
2723 * This code executes in the main server
2724 * thread, so there's no need for locking.
2726 rad_assert(request->next_callback != NULL);
2727 INSERT_EVENT(request->next_callback, request);
2728 request->next_callback = NULL;
2730 } /* else the home server is still alive */
2733 if (request->home_server->proto == IPPROTO_TCP) {
2734 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2735 inet_ntop(request->proxy->dst_ipaddr.af,
2736 &request->proxy->dst_ipaddr.ipaddr,
2737 buffer, sizeof(buffer)),
2738 request->proxy->dst_port,
2739 request->proxy->id);
2744 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2745 inet_ntop(request->proxy->dst_ipaddr.af,
2746 &request->proxy->dst_ipaddr.ipaddr,
2747 buffer, sizeof(buffer)),
2748 request->proxy->dst_port,
2749 request->proxy->id);
2750 request->num_proxied_requests++;
2752 DEBUG_PACKET(request, request->proxy, 1);
2753 request->proxy_listener->send(request->proxy_listener,
2758 case REQUEST_REJECT_DELAY:
2759 RDEBUG2("Waiting to send Access-Reject "
2760 "to client %s port %d - ID: %d",
2762 request->packet->src_port, request->packet->id);
2765 case REQUEST_CLEANUP_DELAY:
2767 if (request->reply->code == 0) {
2768 RDEBUG2("Ignoring retransmit from client %s port %d "
2769 "- ID: %d, no reply was configured",
2771 request->packet->src_port, request->packet->id);
2776 * FIXME: This sends duplicate replies to
2777 * accounting requests, even if Acct-Delay-Time
2778 * or Event-Timestamp is in the packet. In those
2779 * cases, the Id should be changed, and the packet
2782 RDEBUG2("Sending duplicate reply "
2783 "to client %s port %d - ID: %d",
2785 request->packet->src_port, request->packet->id);
2786 DEBUG_PACKET(request, request->reply, 1);
2787 request->listener->send(request->listener, request);
2793 static void received_conflicting_request(REQUEST *request,
2794 const RADCLIENT *client)
2796 radlog(L_ERR, "Received conflicting packet from "
2797 "client %s port %d - ID: %d due to unfinished request %u. Giving up on old request.",
2799 request->packet->src_port, request->packet->id,
2803 * Nuke it from the request hash, so we can receive new
2806 remove_from_request_hash(request);
2808 switch (request->child_state) {
2810 * Tell it to stop, and wait for it to do so.
2813 request->master_state = REQUEST_STOP_PROCESSING;
2814 request->delay += request->delay >> 1;
2816 tv_add(&request->when, request->delay);
2818 INSERT_EVENT(wait_for_child_to_die, request);
2822 * Catch race conditions. It may have switched
2823 * from running to done while this code is being
2826 case REQUEST_REJECT_DELAY:
2827 case REQUEST_CLEANUP_DELAY:
2834 static int can_handle_new_request(RADIUS_PACKET *packet,
2836 struct main_config_t *root)
2839 * Count the total number of requests, to see if
2840 * there are too many. If so, return with an
2843 if (root->max_requests) {
2844 int request_count = fr_packet_list_num_elements(pl);
2847 * This is a new request. Let's see if
2848 * it makes us go over our configured
2851 if (request_count > root->max_requests) {
2852 radlog(L_ERR, "Dropping request (%d is too many): "
2853 "from client %s port %d - ID: %d", request_count,
2855 packet->src_port, packet->id);
2856 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2857 "\tThe value for 'max_requests' is probably set too low.\n");
2859 } /* else there were a small number of requests */
2860 } /* else there was no configured limit for requests */
2863 * FIXME: Add per-client checks. If one client is sending
2864 * too many packets, start discarding them.
2866 * We increment the counters here, and decrement them
2867 * when the response is sent... somewhere in this file.
2871 * FUTURE: Add checks for system load. If the system is
2872 * busy, start dropping requests...
2874 * We can probably keep some statistics ourselves... if
2875 * there are more requests coming in than we can handle,
2876 * start dropping some.
2883 int received_request(rad_listen_t *listener,
2884 RADIUS_PACKET *packet, REQUEST **prequest,
2887 RADIUS_PACKET **packet_p;
2888 REQUEST *request = NULL;
2889 struct main_config_t *root = &mainconfig;
2891 packet_p = fr_packet_list_find(pl, packet);
2893 request = fr_packet2myptr(REQUEST, packet, packet_p);
2894 rad_assert(request->in_request_hash);
2896 if ((request->packet->data_len == packet->data_len) &&
2897 (memcmp(request->packet->vector, packet->vector,
2898 sizeof(packet->vector)) == 0)) {
2899 received_retransmit(request, client);
2904 * The new request is different from the old one,
2905 * but maybe the old is finished. If so, delete
2908 switch (request->child_state) {
2909 struct timeval when;
2913 * Special hacks for race conditions.
2914 * The reply is encoded, and therefore
2915 * likely sent. We received a *new*
2916 * packet from the client, likely before
2917 * the next line or two of code which
2918 * updated the child state. In this
2919 * case, just accept the new request.
2921 if ((request->reply->code != 0) &&
2922 request->reply->data) {
2923 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %u.",
2925 packet->src_port, packet->id,
2927 remove_from_request_hash(request);
2932 gettimeofday(&when, NULL);
2936 * If the cached request was received
2937 * within the last second, then we
2938 * discard the NEW request instead of the
2939 * old one. This will happen ONLY when
2940 * the client is severely broken, and is
2941 * sending conflicting packets very
2944 if (timercmp(&when, &request->received, <)) {
2945 radlog(L_ERR, "Discarding conflicting packet from "
2946 "client %s port %d - ID: %d due to recent request %u.",
2948 packet->src_port, packet->id,
2953 received_conflicting_request(request, client);
2957 case REQUEST_REJECT_DELAY:
2958 case REQUEST_CLEANUP_DELAY:
2959 request->child_state = REQUEST_DONE;
2961 cleanup_delay(request);
2968 * We may want to quench the new request.
2970 if ((listener->type != RAD_LISTEN_DETAIL) &&
2971 !can_handle_new_request(packet, client, root)) {
2976 * Create and initialize the new request.
2978 request = request_alloc(); /* never fails */
2980 if ((request->reply = rad_alloc(0)) == NULL) {
2981 radlog(L_ERR, "No memory");
2985 request->listener = listener;
2986 request->client = client;
2987 request->packet = packet;
2988 request->packet->timestamp = request->timestamp;
2989 request->number = request_num_counter++;
2990 request->priority = listener->type;
2991 #ifdef HAVE_PTHREAD_H
2992 request->child_pid = NO_SUCH_CHILD_PID;
2996 * Status-Server packets go to the head of the queue.
2998 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
3001 * Set virtual server identity
3003 if (client->server) {
3004 request->server = client->server;
3005 } else if (listener->server) {
3006 request->server = listener->server;
3008 request->server = NULL;
3012 * Remember the request in the list.
3014 if (!fr_packet_list_insert(pl, &request->packet)) {
3015 radlog(L_ERR, "Failed to insert request %u in the list of live requests: discarding", request->number);
3016 ev_request_free(&request);
3020 request->in_request_hash = TRUE;
3021 request->root = root;
3024 request->listener->count++;
3028 * The request passes many of our sanity checks.
3029 * From here on in, if anything goes wrong, we
3030 * send a reject message, instead of dropping the
3035 * Build the reply template from the request.
3038 request->reply->sockfd = request->packet->sockfd;
3039 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3040 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3041 request->reply->dst_port = request->packet->src_port;
3042 request->reply->src_port = request->packet->dst_port;
3043 request->reply->id = request->packet->id;
3044 request->reply->code = 0; /* UNKNOWN code */
3045 memcpy(request->reply->vector, request->packet->vector,
3046 sizeof(request->reply->vector));
3047 request->reply->vps = NULL;
3048 request->reply->data = NULL;
3049 request->reply->data_len = 0;
3051 request->master_state = REQUEST_ACTIVE;
3052 request->child_state = REQUEST_QUEUED;
3053 request->next_callback = NULL;
3055 gettimeofday(&request->received, NULL);
3056 request->timestamp = request->received.tv_sec;
3057 request->when = request->received;
3059 request->delay = USEC;
3061 tv_add(&request->when, request->delay);
3063 INSERT_EVENT(wait_a_bit, request);
3065 *prequest = request;
3071 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3077 * Also removes from the proxy hash if responses == requests
3079 request = lookup_in_proxy_hash(packet);
3082 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3083 inet_ntop(packet->src_ipaddr.af,
3084 &packet->src_ipaddr.ipaddr,
3085 buffer, sizeof(buffer)),
3086 packet->src_port, packet->id);
3091 * We haven't replied to the NAS, but we have seen an
3092 * earlier reply from the home server. Ignore this packet,
3093 * as we're likely still processing the previous reply.
3095 if (request->proxy_reply) {
3096 if (memcmp(request->proxy_reply->vector,
3098 sizeof(request->proxy_reply->vector)) == 0) {
3099 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %u",
3100 inet_ntop(packet->src_ipaddr.af,
3101 &packet->src_ipaddr.ipaddr,
3102 buffer, sizeof(buffer)),
3103 packet->src_port, packet->id,
3107 * ? The home server gave us a new proxy
3108 * reply which doesn't match the old
3111 RDEBUG2("Ignoring conflicting proxy reply");
3114 /* assert that there's an event queued for request? */
3119 * Verify the packet before doing ANYTHING with it. This
3120 * means we're doing more MD5 checks in the server core.
3121 * However, we can fix that by moving to multiple threads
3122 * listening on sockets.
3124 * We do this AFTER looking the request up in the hash,
3125 * and AFTER vhecking if we saw a previous request. This
3126 * helps minimize the DoS effect of people attacking us
3127 * with spoofed packets.
3129 if (rad_verify(packet, request->proxy,
3130 request->home_server->secret) != 0) {
3131 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3135 gettimeofday(&now, NULL);
3138 * Maybe move this earlier in the decision process?
3139 * Having it here means that late or duplicate proxy
3140 * replies no longer get the home server marked as
3141 * "alive". This might be good for stability, though.
3143 * FIXME: Do we really want to do this whenever we
3144 * receive a packet? Setting this here means that we
3145 * mark it alive on *any* packet, even if it's lost all
3146 * of the *other* packets in the last 10s.
3148 if (request->proxy->code != PW_STATUS_SERVER) {
3149 request->home_server->state = HOME_STATE_ALIVE;
3154 * When originating CoA, the "proxy" reply is the reply
3155 * to the CoA request that we originated. At this point,
3156 * the original request is finished, and it has a reply.
3158 * However, if we haven't separated the two requests, do
3159 * so now. This is done so that cleaning up the original
3160 * request won't cause the CoA request to be free'd. See
3161 * util.c, request_free()
3163 if (request->parent && (request->parent->coa == request)) {
3164 request->parent->coa = NULL;
3165 request->parent = NULL;
3168 * The proxied packet was different from the
3169 * original packet, AND the proxied packet was
3172 } else if ((request->packet->code != request->proxy->code) &&
3173 ((request->proxy->code == PW_COA_REQUEST) ||
3174 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
3176 * It's already divorced: do nothing.
3181 * Skip the next set of checks, as the original
3182 * reply is cached. We want to be able to still
3183 * process the CoA reply, AND to reference the
3184 * original request/reply.
3186 * This is getting to be really quite a bit of a
3192 * If there's a reply to the NAS, ignore everything
3193 * related to proxy responses
3195 if (request->reply && request->reply->code != 0) {
3196 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3202 * The average includes our time to receive packets and
3203 * look them up in the hashes, which should be the same
3206 * We update the response time only for the FIRST packet
3209 if (request->home_server->ema.window > 0) {
3210 radius_stats_ema(&request->home_server->ema,
3211 &now, &request->proxy_when);
3215 switch (request->child_state) {
3216 case REQUEST_QUEUED:
3217 case REQUEST_RUNNING:
3218 radlog(L_ERR, "Internal sanity check failed for child state");
3221 case REQUEST_REJECT_DELAY:
3222 case REQUEST_CLEANUP_DELAY:
3224 radlog(L_ERR, "Reply from home server %s port %d - ID: %d arrived too late for request %u. Try increasing 'retry_delay' or 'max_request_time'",
3225 inet_ntop(packet->src_ipaddr.af,
3226 &packet->src_ipaddr.ipaddr,
3227 buffer, sizeof(buffer)),
3228 packet->src_port, packet->id,
3230 /* assert that there's an event queued for request? */
3233 case REQUEST_PROXIED:
3237 request->proxy_reply = packet;
3241 * Perform RTT calculations, as per RFC 2988 (for TCP).
3242 * Note that we only do so on the first response.
3244 if ((request->num_proxied_responses == 1)
3246 home_server *home = request->home_server;
3248 rtt = now.tv_sec - request->proxy_when.tv_sec;
3251 rtt -= request->proxy_when.tv_usec;
3253 if (!home->has_rtt) {
3254 home->has_rtt = TRUE;
3257 home->rttvar = rtt / 2;
3260 home->rttvar -= home->rttvar >> 2;
3261 home->rttvar += (home->srtt - rtt);
3262 home->srtt -= home->srtt >> 3;
3263 home->srtt += rtt >> 3;
3266 home->rto = home->srtt;
3267 if (home->rttvar > (USEC / 4)) {
3268 home->rto += home->rttvar * 4;
3276 * There's no incoming request, so it's a proxied packet
3279 if (!request->packet) {
3280 received_response_to_ping(request);
3281 request->proxy_reply = NULL; /* caller will free it */
3282 ev_request_free(&request);
3286 request->child_state = REQUEST_QUEUED;
3287 request->when = now;
3288 request->delay = USEC;
3289 request->priority = RAD_LISTEN_PROXY;
3290 tv_add(&request->when, request->delay);
3293 * Wait a bit will take care of max_request_time
3295 INSERT_EVENT(wait_a_bit, request);
3300 #endif /* WITH_PROXY */
3303 static void tcp_socket_lifetime(void *ctx)
3305 rad_listen_t *listener = ctx;
3308 listener->print(listener, buffer, sizeof(buffer));
3310 DEBUG("Reached maximum lifetime on socket %s", buffer);
3312 listener->status = RAD_LISTEN_STATUS_CLOSED;
3313 event_new_fd(listener);
3316 static void tcp_socket_idle_timeout(void *ctx)
3318 rad_listen_t *listener = ctx;
3319 listen_socket_t *sock = listener->data;
3322 fr_event_now(el, &now); /* should always succeed... */
3324 rad_assert(sock->home != NULL);
3327 * We implement idle timeout by polling, because it's
3328 * cheaper than resetting the idle timeout every time
3329 * we send / receive a packet.
3331 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3332 struct timeval when;
3333 void *fun = tcp_socket_idle_timeout;
3335 when.tv_sec = sock->last_packet;
3336 when.tv_sec += sock->home->idle_timeout;
3339 if (sock->home->lifetime &&
3340 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3341 when.tv_sec = sock->opened + sock->home->lifetime;
3342 fun = tcp_socket_lifetime;
3345 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3346 rad_panic("Failed to insert event");
3352 listener->print(listener, buffer, sizeof(buffer));
3354 DEBUG("Reached idle timeout on socket %s", buffer);
3356 listener->status = RAD_LISTEN_STATUS_CLOSED;
3357 event_new_fd(listener);
3361 int event_new_fd(rad_listen_t *this)
3365 if (this->status == RAD_LISTEN_STATUS_KNOWN) return 1;
3367 this->print(this, buffer, sizeof(buffer));
3369 if (this->status == RAD_LISTEN_STATUS_INIT) {
3371 DEBUG("Listening on %s", buffer);
3373 radlog(L_INFO, " ... adding new socket %s", buffer);
3378 * Add it to the list of sockets we can use.
3379 * Server sockets (i.e. auth/acct) are never
3380 * added to the packet list.
3382 if (this->type == RAD_LISTEN_PROXY) {
3383 listen_socket_t *sock = this->data;
3385 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3386 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3388 &sock->other_ipaddr, sock->other_port,
3391 proxy_no_new_sockets = TRUE;
3392 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3395 * This is bad. However, the
3396 * packet list now supports 256
3397 * open sockets, which should
3398 * minimize this problem.
3400 radlog(L_ERR, "Failed adding proxy socket: %s",
3406 sock->home->num_connections++;
3409 * If necessary, add it to the list of
3410 * new proxy listeners.
3412 if (sock->home->lifetime || sock->home->idle_timeout) {
3413 this->next = proxy_listener_list;
3414 proxy_listener_list = this;
3417 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3420 * Tell the main thread that we've added
3421 * a proxy listener, but only if we need
3422 * to update the event list. Do this
3423 * with the mutex unlocked, to reduce
3427 if (sock->home->lifetime || sock->home->idle_timeout) {
3428 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3436 * Detail files are always known, and aren't
3437 * put into the socket event loop.
3439 if (this->type == RAD_LISTEN_DETAIL) {
3440 this->status = RAD_LISTEN_STATUS_KNOWN;
3443 * Set up the first poll interval.
3445 event_poll_detail(this);
3450 FD_MUTEX_LOCK(&fd_mutex);
3451 if (!fr_event_fd_insert(el, 0, this->fd,
3452 event_socket_handler, this)) {
3453 radlog(L_ERR, "Failed adding event handler for proxy socket!");
3456 FD_MUTEX_UNLOCK(&fd_mutex);
3458 this->status = RAD_LISTEN_STATUS_KNOWN;
3463 * Something went wrong with the socket: make it harmless.
3465 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3469 * Remove it from the list of live FD's.
3471 FD_MUTEX_LOCK(&fd_mutex);
3472 fr_event_fd_delete(el, 0, this->fd);
3473 FD_MUTEX_UNLOCK(&fd_mutex);
3477 * We track requests using this socket only for
3478 * TCP. For UDP, we don't currently close
3482 if (this->type != RAD_LISTEN_PROXY)
3485 if (this->count != 0) {
3486 fr_packet_list_walk(pl, this,
3487 remove_all_requests);
3490 if (this->count == 0) {
3491 this->status = RAD_LISTEN_STATUS_FINISH;
3497 int count = this->count;
3502 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3503 if (!fr_packet_list_socket_freeze(proxy_list,
3505 radlog(L_ERR, "Fatal error freezing socket: %s",
3511 * Doing this with the proxy mutex held
3512 * is a Bad Thing. We should move to
3513 * finer-grained mutexes.
3515 count = this->count;
3517 fr_packet_list_walk(proxy_list, this,
3518 remove_all_proxied_requests);
3520 count = this->count; /* protected by mutex */
3521 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3524 this->status = RAD_LISTEN_STATUS_FINISH;
3528 #endif /* WITH_PROXY */
3529 #endif /* WITH_TCP */
3532 * Re-open the socket, pointing it to /dev/null.
3533 * This means that all writes proceed without
3534 * blocking, and all reads return "no data".
3536 * This leaves the socket active, so any child
3537 * threads won't go insane. But it means that
3538 * they cannot send or receive any packets.
3540 * This is EXTRA work in the normal case, when
3541 * sockets are closed without error. But it lets
3542 * us have one simple processing method for all
3545 devnull = open("/dev/null", O_RDWR);
3547 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3551 if (dup2(devnull, this->fd) < 0) {
3552 radlog(L_ERR, "FATAL failure closing socket: %s",
3558 this->status = RAD_LISTEN_STATUS_CLOSED;
3561 * Fall through to the next section.
3567 * Called ONLY from the main thread. On the following
3573 * (and falling through from "forcibly close FD" above)
3574 * client closed connection on us
3575 * client sent us a bad packet.
3577 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3578 int count = this->count;
3579 rad_assert(this->type != RAD_LISTEN_DETAIL);
3583 * Remove it from the list of active sockets, so
3584 * that it isn't used when proxying new packets.
3586 if (this->type == RAD_LISTEN_PROXY) {
3587 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3588 if (!fr_packet_list_socket_freeze(proxy_list,
3590 radlog(L_ERR, "Fatal error freezing socket: %s",
3594 count = this->count; /* protected by mutex */
3595 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3600 * Requests are still using the socket. Wait for
3604 struct timeval when;
3605 listen_socket_t *sock = this->data;
3608 * Try again to clean up the socket in 30
3611 gettimeofday(&when, NULL);
3614 if (!fr_event_insert(el,
3615 (fr_event_callback_t) event_new_fd,
3616 this, &when, &sock->ev)) {
3617 rad_panic("Failed to insert event");
3624 * No one is using this socket: we can delete it
3627 this->status = RAD_LISTEN_STATUS_FINISH;
3631 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3632 listen_socket_t *sock = this->data;
3634 rad_assert(this->count == 0);
3635 radlog(L_INFO, " ... closing socket %s", buffer);
3638 * Remove it from the list of live FD's. Note
3639 * that it MAY also have been removed above. We
3640 * do it again here, to catch the case of sockets
3641 * closing on idle timeout, or max
3642 * lifetime... AFTER all requests have finished
3645 FD_MUTEX_LOCK(&fd_mutex);
3646 fr_event_fd_delete(el, 0, this->fd);
3647 FD_MUTEX_UNLOCK(&fd_mutex);
3651 * Remove it from the list of sockets to be used
3654 if (this->type == RAD_LISTEN_PROXY) {
3655 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3656 if (!fr_packet_list_socket_remove(proxy_list,
3658 radlog(L_ERR, "Fatal error removing socket: %s",
3662 if (sock->home) sock->home->num_connections--;
3663 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3668 * Remove any pending cleanups.
3670 if (sock->ev) fr_event_delete(el, &sock->ev);
3673 * And finally, close the socket.
3677 #endif /* WITH_TCP */
3682 static void handle_signal_self(int flag)
3684 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3685 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3686 radlog(L_INFO, "Received TERM signal");
3687 fr_event_loop_exit(el, 1);
3689 fr_event_loop_exit(el, 2);
3693 } /* else exit/term flags weren't set */
3696 * Tell the even loop to stop processing.
3698 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3700 static time_t last_hup = 0;
3703 if ((int) (when - last_hup) < 5) {
3704 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3708 radlog(L_INFO, "Received HUP signal.");
3712 fr_event_loop_exit(el, 0x80);
3716 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3720 * FIXME: O(N) loops suck.
3722 for (this = mainconfig.listen;
3724 this = this->next) {
3725 if (this->type != RAD_LISTEN_DETAIL) continue;
3728 * This one didn't send the signal, skip
3731 if (!this->decode(this, NULL)) continue;
3734 * Go service the interrupt.
3736 event_poll_detail(this);
3744 * Add event handlers for idle timeouts && maximum lifetime.
3746 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3747 struct timeval when;
3750 fr_event_now(el, &now);
3752 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3754 while (proxy_listener_list) {
3755 rad_listen_t *this = proxy_listener_list;
3756 listen_socket_t *sock = this->data;
3758 proxy_listener_list = this->next;
3761 if (!sock->home) continue; /* skip UDP sockets */
3765 if (!sock->home->idle_timeout) {
3766 rad_assert(sock->home->lifetime != 0);
3768 when.tv_sec += sock->home->lifetime;
3769 fun = tcp_socket_lifetime;
3771 rad_assert(sock->home->idle_timeout != 0);
3773 when.tv_sec += sock->home->idle_timeout;
3774 fun = tcp_socket_idle_timeout;
3777 if (!fr_event_insert(el, fun, this, &when,
3779 rad_panic("Failed to insert event");
3783 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3785 #endif /* WITH_PROXY */
3786 #endif /* WITH_TCP */
3789 #ifndef WITH_SELF_PIPE
3790 void radius_signal_self(int flag)
3792 handle_signal_self(flag);
3796 * Inform ourselves that we received a signal.
3798 void radius_signal_self(int flag)
3804 * The read MUST be non-blocking for this to work.
3806 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3810 for (i = 0; i < rcode; i++) {
3811 buffer[0] |= buffer[i];
3819 write(self_pipe[1], buffer, 1);
3823 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3824 UNUSED int fd, UNUSED void *ctx)
3829 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3830 if (rcode <= 0) return;
3833 * Merge pending signals.
3835 for (i = 0; i < rcode; i++) {
3836 buffer[0] |= buffer[i];
3839 handle_signal_self(buffer[0]);
3844 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3847 rad_listen_t *listener = ctx;
3848 RAD_REQUEST_FUNP fun;
3851 rad_assert(xel == el);
3855 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3857 if (!listener->recv(listener, &fun, &request)) return;
3859 if (!thread_pool_addrequest(request, fun)) {
3860 request->child_state = REQUEST_DONE;
3866 * This function is called periodically to see if this detail
3867 * file is available for reading.
3869 static void event_poll_detail(void *ctx)
3872 RAD_REQUEST_FUNP fun;
3874 rad_listen_t *this = ctx;
3875 struct timeval when;
3876 listen_detail_t *detail = this->data;
3878 rad_assert(this->type == RAD_LISTEN_DETAIL);
3881 * Try to read something.
3883 * FIXME: This does poll AND receive.
3885 rcode = this->recv(this, &fun, &request);
3887 rad_assert(fun != NULL);
3888 rad_assert(request != NULL);
3890 if (!thread_pool_addrequest(request, fun)) {
3891 request->child_state = REQUEST_DONE;
3895 fr_event_now(el, &now);
3899 * Backdoor API to get the delay until the next poll
3902 delay = this->encode(this, NULL);
3903 tv_add(&when, delay);
3905 if (!fr_event_insert(el, event_poll_detail, this,
3906 &when, &detail->ev)) {
3907 radlog(L_ERR, "Failed creating handler");
3913 static void event_status(struct timeval *wake)
3915 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3919 if (debug_flag == 0) {
3921 radlog(L_INFO, "Ready to process requests.");
3922 just_started = FALSE;
3928 radlog(L_INFO, "Ready to process requests.");
3930 } else if ((wake->tv_sec != 0) ||
3931 (wake->tv_usec >= 100000)) {
3932 DEBUG("Waking up in %d.%01u seconds.",
3933 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3938 * FIXME: Put this somewhere else, where it isn't called
3939 * all of the time...
3942 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3944 * If there are no child threads, then there may
3945 * be child processes. In that case, wait for
3946 * their exit status, and throw that exit status
3947 * away. This helps get rid of zxombie children.
3949 while (waitpid(-1, &argval, WNOHANG) > 0) {
3957 * Externally-visibly functions.
3959 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3961 rad_listen_t *head = NULL;
3965 time(&fr_start_time);
3967 el = fr_event_list_create(event_status);
3970 pl = fr_packet_list_create(0);
3971 if (!pl) return 0; /* leak el */
3973 request_num_counter = 0;
3976 if (mainconfig.proxy_requests) {
3978 * Create the tree for managing proxied requests and
3981 proxy_list = fr_packet_list_create(1);
3982 if (!proxy_list) return 0;
3984 #ifdef HAVE_PTHREAD_H
3985 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3986 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3994 #ifdef HAVE_PTHREAD_H
3996 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3998 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
4001 * Initialize the threads ONLY if we're spawning, AND
4002 * we're running normally.
4004 if (spawn_flag && !check_config &&
4005 (thread_pool_init(cs, &spawn_flag) < 0)) {
4011 * Move all of the thread calls to this file?
4013 * It may be best for the mutexes to be in this file...
4015 have_children = spawn_flag;
4018 DEBUG("%s: #### Skipping IP addresses and Ports ####",
4023 #ifdef WITH_SELF_PIPE
4025 * Child threads need a pipe to signal us, as do the
4028 if (pipe(self_pipe) < 0) {
4029 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
4033 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4034 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4038 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4039 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4044 if (!fr_event_fd_insert(el, 0, self_pipe[0],
4045 event_signal_handler, el)) {
4046 radlog(L_ERR, "Failed creating handler for signals");
4049 #endif /* WITH_SELF_PIPE */
4051 DEBUG("%s: #### Opening IP addresses and Ports ####",
4055 * The server temporarily switches to an unprivileged
4056 * user very early in the bootstrapping process.
4057 * However, some sockets MAY require privileged access
4058 * (bind to device, or to port < 1024, or to raw
4059 * sockets). Those sockets need to call suid up/down
4060 * themselves around the functions that need a privileged
4063 if (listen_init(cs, &head) < 0) {
4067 mainconfig.listen = head;
4070 * At this point, no one has any business *ever* going
4073 fr_suid_down_permanent();
4079 static int request_hash_cb(UNUSED void *ctx, void *data)
4081 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4084 rad_assert(request->in_proxy_hash == FALSE);
4087 ev_request_free(&request);
4094 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4096 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4098 ev_request_free(&request);
4104 void radius_event_free(void)
4107 * FIXME: Stop all threads, or at least check that
4108 * they're all waiting on the semaphore, and the queues
4114 * There are requests in the proxy hash that aren't
4115 * referenced from anywhere else. Remove them first.
4118 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4119 fr_packet_list_free(proxy_list);
4124 fr_packet_list_walk(pl, NULL, request_hash_cb);
4126 fr_packet_list_free(pl);
4129 fr_event_list_free(el);
4132 int radius_event_process(void)
4136 return fr_event_loop(el);
4139 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4141 request->options = RAD_REQUEST_OPTION_DEBUG2;
4143 if (request_pre_handler(request)) {
4144 rad_assert(fun != NULL);
4145 rad_assert(request != NULL);
4147 if (request->server) RDEBUG("server %s {",
4148 request->server != NULL ?
4149 request->server : "");
4152 if (request->server) RDEBUG("} # server %s",
4153 request->server != NULL ?
4154 request->server : "");
4156 request_post_handler(request);
4159 DEBUG2("Going to the next request");