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;
60 static int self_pipe[2];
65 static pthread_mutex_t proxy_mutex;
66 static rad_listen_t *proxy_listener_list = NULL;
67 static int proxy_no_new_sockets = FALSE;
70 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
71 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
73 static pthread_t NO_SUCH_CHILD_PID;
76 * This is easier than ifdef's throughout the code.
78 #define PTHREAD_MUTEX_LOCK(_x)
79 #define PTHREAD_MUTEX_UNLOCK(_x)
80 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
82 request->process = fun;
83 radius_handle_request(request, fun);
89 * We need mutexes around the event FD list *only* in certain
92 #if defined (HAVE_PTHREAD_H) && (defined(WITH_PROXY) || defined(WITH_TCP))
93 static pthread_mutex_t fd_mutex;
94 #define FD_MUTEX_LOCK if (have_children) pthread_mutex_lock
95 #define FD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
98 * This is easier than ifdef's throughout the code.
100 #define FD_MUTEX_LOCK(_x)
101 #define FD_MUTEX_UNLOCK(_x)
105 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
108 static fr_packet_list_t *proxy_list = NULL;
109 static void remove_from_proxy_hash(REQUEST *request);
111 static void check_for_zombie_home_server(REQUEST *request);
113 #define remove_from_proxy_hash(foo)
116 static void request_post_handler(REQUEST *request);
117 static void wait_a_bit(void *ctx);
118 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
120 static void event_poll_detail(void *ctx);
123 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
126 radlog(L_ERR, "[%s:%d] %s", file, line, msg);
130 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
133 static void tv_add(struct timeval *tv, int usec_delay)
135 if (usec_delay > USEC) {
136 tv->tv_sec += usec_delay / USEC;
139 tv->tv_usec += usec_delay;
141 if (tv->tv_usec > USEC) {
142 tv->tv_sec += tv->tv_usec / USEC;
147 static void remove_from_request_hash(REQUEST *request)
149 if (!request->in_request_hash) return;
151 fr_packet_list_yank(pl, request->packet);
152 request->in_request_hash = FALSE;
154 request_stats_final(request);
157 request->listener->count--;
162 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
165 RADIUS_PACKET **proxy_p;
168 PTHREAD_MUTEX_LOCK(&proxy_mutex);
169 proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
172 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
176 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
177 request->num_proxied_responses++; /* needs to be protected by lock */
179 done = (request->num_proxied_requests == request->num_proxied_responses);
180 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
184 * Catch the most common case of everything working
187 if (done) remove_from_proxy_hash(request);
193 static void remove_from_proxy_hash(REQUEST *request)
196 * Check this without grabbing the mutex because it's a
197 * lot faster that way.
199 if (!request->in_proxy_hash) return;
202 * The "not in hash" flag is definitive. However, if the
203 * flag says that it IS in the hash, there might still be
204 * a race condition where it isn't.
206 PTHREAD_MUTEX_LOCK(&proxy_mutex);
208 if (!request->in_proxy_hash) {
209 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
213 fr_packet_list_yank(proxy_list, request->proxy);
214 fr_packet_list_id_free(proxy_list, request->proxy);
217 * On the FIRST reply, decrement the count of outstanding
218 * requests. Note that this is NOT the count of sent
219 * packets, but whether or not the home server has
222 if (!request->proxy_reply &&
223 request->home_server &&
224 request->home_server->currently_outstanding) {
225 request->home_server->currently_outstanding--;
229 request->proxy_listener->count--;
230 request->proxy_listener = NULL;
234 * Got from YES in hash, to NO, not in hash while we hold
235 * the mutex. This guarantees that when another thread
236 * grabs the mutex, the "not in hash" flag is correct.
238 request->in_proxy_hash = FALSE;
240 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
242 #endif /* WITH_PROXY */
244 static void ev_request_free(REQUEST **prequest)
248 if (!prequest || !*prequest) return;
255 * Divorce the child from the parent first,
256 * then clean up the child.
258 request->coa->parent = NULL;
259 ev_request_free(&request->coa);
263 * Divorce the parent from the child, and leave the
264 * parent still alive.
266 if (request->parent && (request->parent->coa == request)) {
267 request->parent->coa = NULL;
271 if (request->ev) fr_event_delete(el, &request->ev);
273 if (request->in_proxy_hash) remove_from_proxy_hash(request);
275 if (request->in_request_hash) remove_from_request_hash(request);
277 request_free(prequest);
281 static int remove_all_requests(void *ctx, void *data)
283 rad_listen_t *this = ctx;
284 RADIUS_PACKET **packet_p = data;
287 request = fr_packet2myptr(REQUEST, packet, packet_p);
288 if (request->packet->sockfd != this->fd) return 0;
290 switch (request->child_state) {
291 case REQUEST_RUNNING:
292 rad_assert(request->ev != NULL); /* or it's lost forever */
294 request->master_state = REQUEST_STOP_PROCESSING;
298 * Waiting for a reply. There's no point in
299 * doing anything else. We remove it from the
300 * request hash so that we can close the upstream
303 case REQUEST_PROXIED:
304 remove_from_request_hash(request);
305 request->child_state = REQUEST_DONE;
308 case REQUEST_REJECT_DELAY:
309 case REQUEST_CLEANUP_DELAY:
311 ev_request_free(&request);
319 static int remove_all_proxied_requests(void *ctx, void *data)
321 rad_listen_t *this = ctx;
322 RADIUS_PACKET **proxy_p = data;
325 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
326 if (request->proxy->sockfd != this->fd) return 0;
328 switch (request->child_state) {
329 case REQUEST_RUNNING:
330 rad_assert(request->ev != NULL); /* or it's lost forever */
332 request->master_state = REQUEST_STOP_PROCESSING;
336 * Eventually we will discover that there is no
337 * response to the proxied request.
339 case REQUEST_PROXIED:
343 * Keep it in the cache for duplicate detection.
345 case REQUEST_REJECT_DELAY:
346 case REQUEST_CLEANUP_DELAY:
351 remove_from_proxy_hash(request);
354 #endif /* WITH_PROXY */
355 #endif /* WITH_TCP */
359 static int insert_into_proxy_hash(REQUEST *request)
363 void *proxy_listener;
365 rad_assert(request->proxy != NULL);
366 rad_assert(proxy_list != NULL);
370 PTHREAD_MUTEX_LOCK(&proxy_mutex);
371 rcode = fr_packet_list_id_alloc(proxy_list,
372 request->home_server->proto,
373 request->proxy, &proxy_listener);
374 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
377 if (proxy_no_new_sockets) return 0;
380 * Also locks the proxy mutex, so we have to call
381 * it with the mutex unlocked. Some systems
382 * don't support recursive mutexes.
384 if (!proxy_new_listener(request->home_server, 0)) {
385 radlog(L_ERR, "Failed to create a new socket for proxying requests.");
388 request->proxy->src_port = 0; /* Use any new socket */
392 RDEBUG2("ERROR: Failed allocating Id for new socket when proxying requests.");
399 request->proxy_listener = proxy_listener;
401 PTHREAD_MUTEX_LOCK(&proxy_mutex);
402 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
403 fr_packet_list_id_free(proxy_list, request->proxy);
404 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
405 radlog(L_PROXY, "Failed to insert entry into proxy list");
409 request->in_proxy_hash = TRUE;
412 * Keep track of maximum outstanding requests to a
413 * particular home server. 'max_outstanding' is
414 * enforced in home_server_ldb(), in realms.c.
416 if (request->home_server) {
417 request->home_server->currently_outstanding++;
421 request->proxy_listener->count++;
424 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
426 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
427 inet_ntop(request->proxy->dst_ipaddr.af,
428 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
429 request->proxy->dst_port,
437 * Called as BOTH an event, and in-line from other functions.
439 static void wait_for_proxy_id_to_expire(void *ctx)
441 REQUEST *request = ctx;
443 rad_assert(request->magic == REQUEST_MAGIC);
444 rad_assert(request->proxy != NULL);
446 fr_event_now(el, &now);
447 request->when = request->proxy_when;
450 if (((request->proxy->code == PW_COA_REQUEST) ||
451 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
452 (request->packet->code != request->proxy->code)) {
453 request->when.tv_sec += request->home_server->coa_mrd;
456 request->when.tv_sec += request->home_server->response_window;
458 if ((request->num_proxied_requests == request->num_proxied_responses) ||
460 (request->home_server->proto == IPPROTO_TCP) ||
462 timercmp(&now, &request->when, >)) {
463 if (request->packet) {
464 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
465 request->number, request->packet->id,
466 (unsigned int) (request->timestamp - fr_start_time));
468 RDEBUG2("Cleaning up request %d with timestamp +%d",
470 (unsigned int) (request->timestamp - fr_start_time));
473 ev_request_free(&request);
477 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
481 #ifdef HAVE_PTHREAD_H
482 static void wait_for_child_to_die(void *ctx)
484 REQUEST *request = ctx;
486 rad_assert(request->magic == REQUEST_MAGIC);
489 * If it's still queued (waiting for a thread to pick it
490 * up) OR, it's running AND there's still a child thread
491 * handling it, THEN delay some more.
493 if ((request->child_state == REQUEST_QUEUED) ||
494 ((request->child_state == REQUEST_RUNNING) &&
495 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0))) {
498 * Cap delay at five minutes.
500 if (request->delay < (USEC * 60 * 5)) {
501 request->delay += (request->delay >> 1);
502 radlog(L_INFO, "WARNING: Child is hung for request %d in component %s module %s.",
503 request->number, request->component, request->module);
505 RDEBUG2("Child is still stuck for request %d",
508 tv_add(&request->when, request->delay);
510 INSERT_EVENT(wait_for_child_to_die, request);
514 RDEBUG2("Child is responsive for request %d", request->number);
515 remove_from_request_hash(request);
518 if (request->proxy) {
519 wait_for_proxy_id_to_expire(request);
524 ev_request_free(&request);
528 static void cleanup_delay(void *ctx)
530 REQUEST *request = ctx;
532 rad_assert(request->magic == REQUEST_MAGIC);
533 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
534 (request->child_state == REQUEST_DONE));
536 remove_from_request_hash(request);
539 if (request->proxy && request->in_proxy_hash) {
540 wait_for_proxy_id_to_expire(request);
545 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
546 request->number, request->packet->id,
547 (unsigned int) (request->timestamp - fr_start_time));
549 ev_request_free(&request);
554 * In daemon mode, AND this request has debug flags set.
556 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
558 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
562 const char *received, *from;
563 const fr_ipaddr_t *ip;
566 if (!packet || (packet->code == 0)) return;
568 rad_assert(request->radlog != NULL);
570 if (direction == 0) {
571 received = "Received";
572 from = "from"; /* what else? */
573 ip = &packet->src_ipaddr;
574 port = packet->src_port;
577 received = "Sending";
578 from = "to"; /* hah! */
579 ip = &packet->dst_ipaddr;
580 port = packet->dst_port;
584 * Client-specific debugging re-prints the input
585 * packet into the client log.
587 * This really belongs in a utility library
589 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
590 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
591 received, fr_packet_codes[packet->code], from,
592 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
593 port, packet->id, packet->data_len);
595 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
597 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
599 packet->code, packet->id, packet->data_len);
602 for (vp = packet->vps; vp != NULL; vp = vp->next) {
603 vp_prints(buffer, sizeof(buffer), vp);
604 request->radlog(L_DBG, 0, request, "\t%s", buffer);
608 static void reject_delay(void *ctx)
610 REQUEST *request = ctx;
612 rad_assert(request->magic == REQUEST_MAGIC);
613 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
615 RDEBUG2("Sending delayed reject for request %d", request->number);
617 DEBUG_PACKET(request, request->reply, 1);
619 request->listener->send(request->listener, request);
621 request->when.tv_sec += request->root->cleanup_delay;
622 request->child_state = REQUEST_CLEANUP_DELAY;
624 INSERT_EVENT(cleanup_delay, request);
629 void revive_home_server(void *ctx)
631 home_server *home = ctx;
635 rad_assert(home->proto != IPPROTO_TCP);
638 home->state = HOME_STATE_ALIVE;
639 home->currently_outstanding = 0;
640 home->revive_time = now;
643 * Delete any outstanding events.
645 if (home->ev) fr_event_delete(el, &home->ev);
647 radlog(L_PROXY, "Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
648 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
649 buffer, sizeof(buffer)),
655 static void no_response_to_ping(void *ctx)
657 REQUEST *request = ctx;
661 rad_assert(request->home_server != NULL);
663 home = request->home_server;
665 rad_assert(home->proto != IPPROTO_TCP);
668 home->num_received_pings = 0;
670 radlog(L_ERR, "No response to status check %d for home server %s port %d",
672 inet_ntop(request->proxy->dst_ipaddr.af,
673 &request->proxy->dst_ipaddr.ipaddr,
674 buffer, sizeof(buffer)),
675 request->proxy->dst_port);
677 check_for_zombie_home_server(request);
679 wait_for_proxy_id_to_expire(request);
683 static void received_response_to_ping(REQUEST *request)
688 rad_assert(request->home_server != NULL);
690 home = request->home_server;
692 rad_assert(home->proto != IPPROTO_TCP);
695 home->num_received_pings++;
697 radlog(L_PROXY, "Received response to status check %d (%d in current sequence)",
698 request->number, home->num_received_pings);
701 * Remove the request from any hashes
703 fr_event_delete(el, &request->ev);
704 remove_from_proxy_hash(request);
705 rad_assert(request->in_request_hash == FALSE);
708 * The control socket may have marked the home server as
709 * alive. OR, it may have suddenly started responding to
710 * requests again. If so, don't re-do the "make alive"
713 if (home->state == HOME_STATE_ALIVE) return;
716 * We haven't received enough ping responses to mark it
717 * "alive". Wait a bit.
719 if (home->num_received_pings < home->num_pings_to_alive) {
723 home->state = HOME_STATE_ALIVE;
724 home->currently_outstanding = 0;
725 home->revive_time = now;
727 if (!fr_event_delete(el, &home->ev)) {
728 RDEBUG2("Hmm... no event for home server. Oh well.");
731 radlog(L_PROXY, "Marking home server %s port %d alive",
732 inet_ntop(request->proxy->dst_ipaddr.af,
733 &request->proxy->dst_ipaddr.ipaddr,
734 buffer, sizeof(buffer)),
735 request->proxy->dst_port);
740 * Called from start of zombie period, OR after control socket
741 * marks the home server dead.
743 static void ping_home_server(void *ctx)
746 home_server *home = ctx;
751 rad_assert(home->proto != IPPROTO_TCP);
754 if ((home->state == HOME_STATE_ALIVE) ||
755 (home->ping_check == HOME_PING_CHECK_NONE) ||
756 (home->ev != NULL)) {
760 request = request_alloc();
761 request->number = request_num_counter++;
763 request->proxy = rad_alloc(1);
764 rad_assert(request->proxy != NULL);
766 fr_event_now(el, &request->when);
767 home->when = request->when;
769 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
770 request->proxy->code = PW_STATUS_SERVER;
772 radius_pairmake(request, &request->proxy->vps,
773 "Message-Authenticator", "0x00", T_OP_SET);
775 } else if (home->type == HOME_TYPE_AUTH) {
776 request->proxy->code = PW_AUTHENTICATION_REQUEST;
778 radius_pairmake(request, &request->proxy->vps,
779 "User-Name", home->ping_user_name, T_OP_SET);
780 radius_pairmake(request, &request->proxy->vps,
781 "User-Password", home->ping_user_password, T_OP_SET);
782 radius_pairmake(request, &request->proxy->vps,
783 "Service-Type", "Authenticate-Only", T_OP_SET);
784 radius_pairmake(request, &request->proxy->vps,
785 "Message-Authenticator", "0x00", T_OP_SET);
788 #ifdef WITH_ACCOUNTING
789 request->proxy->code = PW_ACCOUNTING_REQUEST;
791 radius_pairmake(request, &request->proxy->vps,
792 "User-Name", home->ping_user_name, T_OP_SET);
793 radius_pairmake(request, &request->proxy->vps,
794 "Acct-Status-Type", "Stop", T_OP_SET);
795 radius_pairmake(request, &request->proxy->vps,
796 "Acct-Session-Id", "00000000", T_OP_SET);
797 vp = radius_pairmake(request, &request->proxy->vps,
798 "Event-Timestamp", "0", T_OP_SET);
799 vp->vp_date = now.tv_sec;
801 rad_assert("Internal sanity check failed");
805 radius_pairmake(request, &request->proxy->vps,
806 "NAS-Identifier", "Status Check. Are you alive?",
809 request->proxy->dst_ipaddr = home->ipaddr;
810 request->proxy->dst_port = home->port;
811 request->home_server = home;
813 rad_assert(request->proxy_listener == NULL);
815 if (!insert_into_proxy_hash(request)) {
816 radlog(L_PROXY, "Failed inserting status check %d into proxy hash. Discarding it.",
818 ev_request_free(&request);
821 rad_assert(request->proxy_listener != NULL);
822 request->proxy_listener->send(request->proxy_listener,
825 request->next_callback = NULL;
826 request->child_state = REQUEST_PROXIED;
827 request->when.tv_sec += home->ping_timeout;;
829 INSERT_EVENT(no_response_to_ping, request);
832 * Add +/- 2s of jitter, as suggested in RFC 3539
833 * and in the Issues and Fixes draft.
835 home->when.tv_sec += home->ping_interval - 2;
838 jitter ^= (jitter >> 10);
839 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
841 tv_add(&home->when, jitter);
843 INSERT_EVENT(ping_home_server, home);
847 void mark_home_server_dead(home_server *home, struct timeval *when)
849 int previous_state = home->state;
852 radlog(L_PROXY, "Marking home server %s port %d as dead.",
853 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
854 buffer, sizeof(buffer)),
857 home->state = HOME_STATE_IS_DEAD;
858 home->num_received_pings = 0;
860 if (home->ping_check != HOME_PING_CHECK_NONE) {
862 * If the control socket marks us dead, start
863 * pinging. Otherwise, we already started
864 * pinging when it was marked "zombie".
866 if (previous_state == HOME_STATE_ALIVE) {
867 ping_home_server(home);
872 * Revive it after a fixed period of time. This
873 * is very, very, bad.
876 home->when.tv_sec += home->revive_interval;
878 INSERT_EVENT(revive_home_server, home);
882 static void check_for_zombie_home_server(REQUEST *request)
887 home = request->home_server;
889 if (home->state != HOME_STATE_ZOMBIE) return;
891 when = home->zombie_period_start;
892 when.tv_sec += home->zombie_period;
894 fr_event_now(el, &now);
895 if (timercmp(&now, &when, <)) {
899 mark_home_server_dead(home, &request->when);
902 static int proxy_to_virtual_server(REQUEST *request);
904 static int virtual_server_handler(UNUSED REQUEST *request)
906 proxy_to_virtual_server(request);
910 static void proxy_fallback_handler(REQUEST *request)
913 * A proper time is required for wait_a_bit.
915 request->delay = USEC / 10;
916 gettimeofday(&now, NULL);
917 request->next_when = now;
918 tv_add(&request->next_when, request->delay);
919 request->next_callback = wait_a_bit;
922 * Re-queue the request.
924 request->child_state = REQUEST_QUEUED;
926 rad_assert(request->proxy != NULL);
927 if (!thread_pool_addrequest(request, virtual_server_handler)) {
928 request->child_state = REQUEST_DONE;
931 #ifdef HAVE_PTHREAD_H
933 * MAY free the request if we're over max_request_time,
934 * AND we're not in threaded mode!
936 * Note that we call this ONLY if we're threaded, as
937 * if we're NOT threaded, request_post_handler() calls
938 * wait_a_bit(), which means that "request" may not
941 if (have_children) wait_a_bit(request);
946 static int setup_post_proxy_fail(REQUEST *request)
948 DICT_VALUE *dval = NULL;
951 request->child_state = REQUEST_RUNNING;
953 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
954 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
956 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
957 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
961 * See no_response_to_coa_request
963 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
964 request->packet->code &= 0xff; /* restore it */
966 if (request->proxy->code == PW_COA_REQUEST) {
967 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
969 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
970 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
980 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
983 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
987 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
988 if (!vp) vp = radius_paircreate(request, &request->config_items,
989 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
990 vp->vp_integer = dval->value;
992 rad_assert(request->proxy_reply == NULL);
998 static int null_handler(UNUSED REQUEST *request)
1003 static void post_proxy_fail_handler(REQUEST *request)
1006 * A proper time is required for wait_a_bit.
1008 request->delay = USEC / 10;
1009 gettimeofday(&now, NULL);
1012 * Not set up to run Post-Proxy-Type = Fail.
1014 * Mark the request as still running, and figure out what
1017 if (!setup_post_proxy_fail(request)) {
1018 request_post_handler(request);
1022 * Re-queue the request.
1024 request->child_state = REQUEST_QUEUED;
1027 * There is a post-proxy-type of fail. We run
1028 * the request through the pre/post proxy
1029 * handlers, just like it was a real proxied
1030 * request. However, we set the per-request
1031 * handler to NULL, as we don't want to do
1034 * Note that when we're not threaded, this will
1035 * process the request even if it's greater than
1036 * max_request_time. That's not fatal.
1038 request->priority = 0;
1039 rad_assert(request->proxy != NULL);
1040 thread_pool_addrequest(request, null_handler);
1044 * MAY free the request if we're over max_request_time,
1045 * AND we're not in threaded mode!
1047 * Note that we call this ONLY if we're threaded, as
1048 * if we're NOT threaded, request_post_handler() calls
1049 * wait_a_bit(), which means that "request" may not
1052 if (have_children) wait_a_bit(request);
1055 /* maybe check this against wait_for_proxy_id_to_expire? */
1056 static void no_response_to_proxied_request(void *ctx)
1058 REQUEST *request = ctx;
1062 rad_assert(request->magic == REQUEST_MAGIC);
1064 if (request->master_state == REQUEST_STOP_PROCESSING) {
1065 ev_request_free(&request);
1069 rad_assert(request->child_state == REQUEST_PROXIED);
1072 * If we've failed over to an internal home server,
1073 * replace the callback with the correct one. This
1074 * is due to locking issues with child threads...
1076 if (request->home_server->server) {
1077 wait_a_bit(request);
1082 if (request->home_server->proto != IPPROTO_TCP)
1084 check_for_zombie_home_server(request);
1086 home = request->home_server;
1089 * The default as of 2.1.7 is to allow requests to
1090 * fail-over to a backup home server when this one does
1091 * not respond. The old behavior can be configured as
1094 if (home->no_response_fail) {
1095 radlog(L_ERR, "Rejecting request %d (proxy Id %d) due to lack of any response from home server %s port %d",
1096 request->number, request->proxy->id,
1097 inet_ntop(request->proxy->dst_ipaddr.af,
1098 &request->proxy->dst_ipaddr.ipaddr,
1099 buffer, sizeof(buffer)),
1100 request->proxy->dst_port);
1102 post_proxy_fail_handler(request);
1105 * Enforce max_request_time.
1107 * We fail over to another backup home server
1108 * when the client re-transmits the request. If
1109 * the client doesn't re-transmit, no fail-over
1112 rad_assert(request->ev == NULL);
1113 request->child_state = REQUEST_RUNNING;
1114 wait_a_bit(request);
1118 * Don't touch request due to race conditions
1123 * Do nothing more. The home server didn't respond,
1124 * but that isn't a catastrophic failure. Some home
1125 * servers don't respond to packets...
1127 if (home->proto == IPPROTO_TCP) {
1129 * FIXME: Set up TCP pinging on this connection.
1131 * Maybe the CONNECTION is dead, but the home
1132 * server is alive. In that case, we need to start
1133 * pinging on the connection.
1135 * This means doing the pinging BEFORE the
1136 * post_proxy_fail_handler above, as it may do
1137 * something with the request, and cause the
1138 * proxy listener to go away!
1144 if (home->state == HOME_STATE_IS_DEAD) {
1145 rad_assert(home->ev != NULL); /* or it will never wake up */
1150 * Enable the zombie period when we notice that the home
1151 * server hasn't responded. We do NOT back-date the start
1152 * of the zombie period.
1154 if (home->state == HOME_STATE_ALIVE) {
1155 home->state = HOME_STATE_ZOMBIE;
1156 home->zombie_period_start = now;
1157 fr_event_delete(el, &home->ev);
1158 home->currently_outstanding = 0;
1159 home->num_received_pings = 0;
1161 radlog(L_PROXY, "Marking home server %s port %d as zombie (it looks like it is dead).",
1162 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1163 buffer, sizeof(buffer)),
1167 * Start pinging the home server.
1169 ping_home_server(home);
1174 static void wait_a_bit(void *ctx)
1176 struct timeval when;
1177 REQUEST *request = ctx;
1178 fr_event_callback_t callback = NULL;
1180 rad_assert(request->magic == REQUEST_MAGIC);
1183 * The socket was closed. Tell the request that
1184 * there is no point in continuing.
1186 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1187 goto stop_processing;
1192 * The CoA request is a new (internally generated)
1193 * request, created in a child thread. We therefore need
1194 * some way to tie its events back into the main event
1197 if (request->coa && !request->coa->proxy_reply &&
1198 request->coa->next_callback) {
1199 request->coa->when = request->coa->next_when;
1200 INSERT_EVENT(request->coa->next_callback, request->coa);
1201 request->coa->next_callback = NULL;
1202 request->coa->parent = NULL;
1203 request->coa = NULL;
1207 switch (request->child_state) {
1208 case REQUEST_QUEUED:
1209 case REQUEST_RUNNING:
1210 when = request->received;
1211 when.tv_sec += request->root->max_request_time;
1214 * Normally called from the event loop with the
1215 * proper event loop time. Otherwise, called from
1216 * post proxy fail handler, which sets "now", and
1217 * this call won't re-set it, because we're not
1218 * in the event loop.
1220 fr_event_now(el, &now);
1223 * Request still has more time. Continue
1226 if (timercmp(&now, &when, <) ||
1227 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1228 (request->child_state == REQUEST_QUEUED))) {
1229 if (request->delay < (USEC / 10)) {
1230 request->delay = USEC / 10;
1232 request->delay += request->delay >> 1;
1236 * Cap wait at some sane value for detail
1239 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1240 (request->delay > (request->root->max_request_time * USEC))) {
1241 request->delay = request->root->max_request_time * USEC;
1245 request->when = now;
1246 tv_add(&request->when, request->delay);
1247 callback = wait_a_bit;
1252 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1254 * A child thread MAY still be running on the
1255 * request. Ask the thread to stop working on
1258 if (have_children &&
1259 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1260 request->master_state = REQUEST_STOP_PROCESSING;
1262 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1264 request->module ? request->module : "<server core>",
1265 request->component ? request->component : "<server core>");
1267 request->delay = USEC / 4;
1268 tv_add(&request->when, request->delay);
1269 callback = wait_for_child_to_die;
1275 * Else no child thread is processing the
1276 * request. We probably should have just marked
1277 * the request as 'done' elsewhere, like in the
1278 * post-proxy-fail handler. But doing that would
1279 * involve checking for max_request_time in
1280 * multiple places, so this may be simplest.
1282 request->child_state = REQUEST_DONE;
1286 * Mark the request as no longer running,
1290 #ifdef HAVE_PTHREAD_H
1291 request->child_pid = NO_SUCH_CHILD_PID;
1296 * This is a CoA request. It's been divorced
1297 * from everything else, so we clean it up now.
1299 if (!request->in_request_hash &&
1301 (request->packet->code != request->proxy->code) &&
1302 ((request->proxy->code == PW_COA_REQUEST) ||
1303 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1305 * FIXME: Do CoA MIBs
1307 ev_request_free(&request);
1311 request_stats_final(request);
1312 cleanup_delay(request);
1315 case REQUEST_REJECT_DELAY:
1316 case REQUEST_CLEANUP_DELAY:
1317 #ifdef HAVE_PTHREAD_H
1318 request->child_pid = NO_SUCH_CHILD_PID;
1320 request_stats_final(request);
1322 case REQUEST_PROXIED:
1323 rad_assert(request->next_callback != NULL);
1324 rad_assert(request->next_callback != wait_a_bit);
1326 request->when = request->next_when;
1327 callback = request->next_callback;
1328 request->next_callback = NULL;
1332 rad_panic("Internal sanity check failure");
1337 * Something major went wrong. Discard the request, and
1340 * FIXME: No idea why this happens or how to fix it...
1341 * It seems to happen *only* when requests are proxied,
1342 * and where the home server doesn't respond. So it looks
1343 * like a race condition above, but it happens in debug
1344 * mode, with no threads...
1347 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1348 ev_request_free(&request);
1352 INSERT_EVENT(callback, request);
1356 static void no_response_to_coa_request(void *ctx)
1358 REQUEST *request = ctx;
1361 rad_assert(request->magic == REQUEST_MAGIC);
1362 rad_assert(request->child_state == REQUEST_PROXIED);
1363 rad_assert(request->home_server != NULL);
1364 rad_assert(!request->in_request_hash);
1366 radlog(L_ERR, "No response to CoA request sent to %s",
1367 inet_ntop(request->proxy->dst_ipaddr.af,
1368 &request->proxy->dst_ipaddr.ipaddr,
1369 buffer, sizeof(buffer)));
1374 request->packet->code |= (PW_COA_REQUEST << 8);
1375 post_proxy_fail_handler(request);
1379 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1383 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1390 packet->data = NULL;
1391 packet->data_len = 0;
1394 return 1; /* time stamp updated */
1399 * Called when we haven't received a response to a CoA request.
1401 static void retransmit_coa_request(void *ctx)
1405 REQUEST *request = ctx;
1407 rad_assert(request->magic == REQUEST_MAGIC);
1408 rad_assert(request->child_state == REQUEST_PROXIED);
1409 rad_assert(request->home_server != NULL);
1410 rad_assert(!request->in_request_hash);
1411 rad_assert(request->parent == NULL);
1413 fr_event_now(el, &now);
1416 * Cap count at MRC, if it is non-zero.
1418 if (request->home_server->coa_mrc &&
1419 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1420 no_response_to_coa_request(request);
1425 * RFC 5080 Section 2.2.1
1427 * RT = 2*RTprev + RAND*RTprev
1428 * = 1.9 * RTprev + rand(0,.2) * RTprev
1429 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1432 delay ^= (delay >> 16);
1434 frac = request->delay / 5;
1435 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1437 delay += (2 * request->delay) - (request->delay / 10);
1440 * Cap delay at MRT, if MRT is non-zero.
1442 if (request->home_server->coa_mrt &&
1443 (delay > (request->home_server->coa_mrt * USEC))) {
1444 int mrt_usec = request->home_server->coa_mrt * USEC;
1447 * delay = MRT + RAND * MRT
1448 * = 0.9 MRT + rand(0,.2) * MRT
1451 delay ^= (delay >> 15);
1453 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1454 delay += mrt_usec - (mrt_usec / 10);
1457 request->delay = delay;
1458 request->when = now;
1459 tv_add(&request->when, request->delay);
1460 mrd = request->proxy_when;
1461 mrd.tv_sec += request->home_server->coa_mrd;
1464 * Cap duration at MRD.
1466 if (timercmp(&mrd, &request->when, <)) {
1467 request->when = mrd;
1468 INSERT_EVENT(no_response_to_coa_request, request);
1471 INSERT_EVENT(retransmit_coa_request, request);
1474 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1476 * Keep a copy of the old Id so that the
1477 * re-transmitted request doesn't re-use the old
1480 RADIUS_PACKET old = *request->proxy;
1483 * Don't free the old Id on error.
1485 if (!insert_into_proxy_hash(request)) {
1486 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1491 * Now that we have a new Id, free the old one.
1493 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1494 fr_packet_list_yank(proxy_list, &old);
1495 fr_packet_list_id_free(proxy_list, &old);
1496 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1498 request->num_proxied_requests = 0;
1499 request->num_proxied_responses = 0;
1502 request->num_proxied_requests++;
1503 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1505 request->proxy_listener->send(request->proxy_listener,
1511 * The original request is either DONE, or in CLEANUP_DELAY.
1513 static int originated_coa_request(REQUEST *request)
1515 int delay, rcode, pre_proxy_type = 0;
1521 rad_assert(request->proxy == NULL);
1522 rad_assert(!request->in_proxy_hash);
1523 rad_assert(request->proxy_reply == NULL);
1526 * Check whether we want to originate one, or cancel one.
1528 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1529 if (!vp && request->coa) {
1530 vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1534 if (vp->vp_integer == 0) {
1535 ev_request_free(&request->coa);
1536 return 1; /* success */
1540 if (!request->coa) request_alloc_coa(request);
1541 if (!request->coa) return 0;
1546 * src_ipaddr will be set up in proxy_encode.
1548 memset(&ipaddr, 0, sizeof(ipaddr));
1549 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1551 ipaddr.af = AF_INET;
1552 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1554 } else if ((vp = pairfind(coa->proxy->vps,
1555 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1556 ipaddr.af = AF_INET6;
1557 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1559 } else if ((vp = pairfind(coa->proxy->vps,
1560 PW_HOME_SERVER_POOL)) != NULL) {
1561 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1563 if (!coa->home_pool) {
1564 RDEBUG2("WARNING: No such home_server_pool %s",
1567 ev_request_free(&request->coa);
1574 } else if (request->client->coa_pool) {
1575 coa->home_pool = request->client->coa_pool;
1577 } else if (request->client->coa_server) {
1578 coa->home_server = request->client->coa_server;
1582 * If all else fails, send it to the client that
1583 * originated this request.
1585 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1589 * Use the pool, if it exists.
1591 if (coa->home_pool) {
1592 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1593 if (!coa->home_server) {
1594 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1598 } else if (!coa->home_server) {
1599 int port = PW_COA_UDP_PORT;
1601 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1602 if (vp) port = vp->vp_integer;
1604 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1605 if (!coa->home_server) {
1606 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1607 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1608 buffer, sizeof(buffer)), port);
1613 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1615 switch (vp->vp_integer) {
1616 case PW_COA_REQUEST:
1617 case PW_DISCONNECT_REQUEST:
1618 coa->proxy->code = vp->vp_integer;
1622 DEBUG("Cannot set CoA Packet-Type to code %d",
1628 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1631 * The rest of the server code assumes that
1632 * request->packet && request->reply exist. Copy them
1633 * from the original request.
1635 rad_assert(coa->packet != NULL);
1636 rad_assert(coa->packet->vps == NULL);
1637 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1638 coa->packet->vps = paircopy(request->packet->vps);
1639 coa->packet->data = NULL;
1640 rad_assert(coa->reply != NULL);
1641 rad_assert(coa->reply->vps == NULL);
1642 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1643 coa->reply->vps = paircopy(request->reply->vps);
1644 coa->reply->data = NULL;
1645 coa->config_items = paircopy(request->config_items);
1648 * Call the pre-proxy routines.
1650 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1652 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1653 pre_proxy_type = vp->vp_integer;
1656 if (coa->home_pool && coa->home_pool->virtual_server) {
1657 const char *old_server = coa->server;
1659 coa->server = coa->home_pool->virtual_server;
1660 RDEBUG2(" server %s {", coa->server);
1661 rcode = module_pre_proxy(pre_proxy_type, coa);
1663 coa->server = old_server;
1665 rcode = module_pre_proxy(pre_proxy_type, coa);
1672 * Only send the CoA packet if the pre-proxy code succeeded.
1674 case RLM_MODULE_NOOP:
1676 case RLM_MODULE_UPDATED:
1681 * Source IP / port is set when the proxy socket
1684 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1685 coa->proxy->dst_port = coa->home_server->port;
1687 if (!insert_into_proxy_hash(coa)) {
1688 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1693 * We CANNOT divorce the CoA request from the parent
1694 * request. This function is running in a child thread,
1695 * and we need access to the main event loop in order to
1696 * to add the timers for the CoA packet. See
1701 * Forget about the original request completely at this
1706 gettimeofday(&request->proxy_when, NULL);
1707 request->received = request->next_when = request->proxy_when;
1708 rad_assert(request->proxy_reply == NULL);
1711 * Implement re-transmit algorithm as per RFC 5080
1714 * We want IRT + RAND*IRT
1715 * or 0.9 IRT + rand(0,.2) IRT
1717 * 2^20 ~ USEC, and we want 2.
1718 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1720 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1721 request->delay = delay * request->home_server->coa_irt;
1722 delay = request->home_server->coa_irt * USEC;
1723 delay -= delay / 10;
1724 delay += request->delay;
1726 request->delay = delay;
1727 tv_add(&request->next_when, delay);
1728 request->next_callback = retransmit_coa_request;
1731 * Note that we set proxied BEFORE sending the packet.
1733 * Once we send it, the request is tainted, as
1734 * another thread may have picked it up. Don't
1737 request->num_proxied_requests = 1;
1738 request->num_proxied_responses = 0;
1739 request->child_pid = NO_SUCH_CHILD_PID;
1741 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1743 request->child_state = REQUEST_PROXIED;
1745 DEBUG_PACKET(request, request->proxy, 1);
1747 request->proxy_listener->send(request->proxy_listener,
1751 #endif /* WITH_COA */
1754 static int process_proxy_reply(REQUEST *request)
1757 int post_proxy_type = 0;
1761 * Delete any reply we had accumulated until now.
1763 pairfree(&request->reply->vps);
1766 * Run the packet through the post-proxy stage,
1767 * BEFORE playing games with the attributes.
1769 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1771 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1772 post_proxy_type = vp->vp_integer;
1775 if (request->home_pool && request->home_pool->virtual_server) {
1776 const char *old_server = request->server;
1778 request->server = request->home_pool->virtual_server;
1779 RDEBUG2(" server %s {", request->server);
1780 rcode = module_post_proxy(post_proxy_type, request);
1782 request->server = old_server;
1784 rcode = module_post_proxy(post_proxy_type, request);
1788 if (request->packet->code == request->proxy->code)
1790 * Don't run the next bit if we originated a CoA
1791 * packet, after receiving an Access-Request or
1792 * Accounting-Request.
1797 * There may NOT be a proxy reply, as we may be
1798 * running Post-Proxy-Type = Fail.
1800 if (request->proxy_reply) {
1802 * Delete the Proxy-State Attributes from
1803 * the reply. These include Proxy-State
1804 * attributes from us and remote server.
1806 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1809 * Add the attributes left in the proxy
1810 * reply to the reply list.
1812 pairadd(&request->reply->vps, request->proxy_reply->vps);
1813 request->proxy_reply->vps = NULL;
1816 * Free proxy request pairs.
1818 pairfree(&request->proxy->vps);
1822 default: /* Don't do anything */
1824 case RLM_MODULE_FAIL:
1825 /* FIXME: debug print stuff */
1826 request->child_state = REQUEST_DONE;
1829 case RLM_MODULE_HANDLED:
1830 /* FIXME: debug print stuff */
1831 request->child_state = REQUEST_DONE;
1839 static int request_pre_handler(REQUEST *request)
1843 rad_assert(request->magic == REQUEST_MAGIC);
1844 rad_assert(request->packet != NULL);
1846 request->child_state = REQUEST_RUNNING;
1849 * Don't decode the packet if it's an internal "fake"
1850 * request. Instead, just return so that the caller can
1853 if (request->packet->dst_port == 0) {
1854 request->username = pairfind(request->packet->vps,
1856 request->password = pairfind(request->packet->vps,
1863 * Put the decoded packet into it's proper place.
1865 if (request->proxy_reply != NULL) {
1867 * FIXME: For now, we can only proxy RADIUS packets.
1869 * In order to proxy other packets, we need to
1870 * somehow cache the "decode" function.
1872 rcode = rad_decode(request->proxy_reply, request->proxy,
1873 request->home_server->secret);
1874 DEBUG_PACKET(request, request->proxy_reply, 0);
1877 if (request->packet->vps == NULL) {
1878 rcode = request->listener->decode(request->listener, request);
1880 if (debug_condition) {
1882 const char *my_debug = debug_condition;
1885 * Ignore parse errors.
1887 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1891 request->options = 2;
1892 request->radlog = radlog_request;
1896 DEBUG_PACKET(request, request->packet, 0);
1902 RDEBUG("%s Dropping packet without response.", fr_strerror());
1903 request->reply->offset = -2; /* bad authenticator */
1904 request->child_state = REQUEST_DONE;
1908 if (!request->username) {
1909 request->username = pairfind(request->packet->vps,
1914 if (request->proxy) {
1915 return process_proxy_reply(request);
1925 * Do state handling when we proxy a request.
1927 static int proxy_request(REQUEST *request)
1929 struct timeval when;
1934 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
1935 ev_request_free(&request->coa);
1939 if (request->home_server->server) {
1940 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1944 if (!insert_into_proxy_hash(request)) {
1945 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1949 request->proxy_listener->encode(request->proxy_listener, request);
1951 when = request->received;
1952 when.tv_sec += request->root->max_request_time;
1954 gettimeofday(&request->proxy_when, NULL);
1956 request->next_when = request->proxy_when;
1957 request->next_when.tv_sec += request->home_server->response_window;
1959 rad_assert(request->home_server->response_window > 0);
1961 if (timercmp(&when, &request->next_when, <)) {
1962 request->next_when = when;
1964 request->next_callback = no_response_to_proxied_request;
1966 RDEBUG2("Proxying request %d to home server %s port %d",
1968 inet_ntop(request->proxy->dst_ipaddr.af,
1969 &request->proxy->dst_ipaddr.ipaddr,
1970 buffer, sizeof(buffer)),
1971 request->proxy->dst_port);
1974 * Note that we set proxied BEFORE sending the packet.
1976 * Once we send it, the request is tainted, as
1977 * another thread may have picked it up. Don't
1980 request->num_proxied_requests = 1;
1981 request->num_proxied_responses = 0;
1982 #ifdef HAVE_PTHREAD_H
1983 request->child_pid = NO_SUCH_CHILD_PID;
1985 request->child_state = REQUEST_PROXIED;
1987 DEBUG_PACKET(request, request->proxy, 1);
1989 request->proxy_listener->send(request->proxy_listener,
1996 * "Proxy" the request by sending it to a new virtual server.
1998 static int proxy_to_virtual_server(REQUEST *request)
2002 if (!request->home_server || !request->home_server->server) return 0;
2004 if (request->parent) {
2005 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
2009 fake = request_alloc_fake(request);
2011 RDEBUG2("WARNING: Out of memory");
2015 fake->packet->vps = paircopy(request->proxy->vps);
2016 fake->server = request->home_server->server;
2018 if ((request->proxy->code != PW_AUTHENTICATION_REQUEST)
2019 #ifdef WITH_ACCOUNTING
2020 && (request->proxy->code == PW_ACCOUNTING_REQUEST)
2023 RDEBUG2("Unknown packet type %d", request->proxy->code);
2024 ev_request_free(&fake);
2028 rad_assert(request->process != NULL);
2030 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2031 radius_handle_request(fake, fake->process);
2032 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2034 if (fake->reply->code != 0) {
2035 request->proxy_reply = fake->reply;
2039 * There was no response
2041 setup_post_proxy_fail(request);
2044 ev_request_free(&fake);
2046 process_proxy_reply(request);
2049 * Process it through the normal section again, but ONLY
2050 * if we received a proxy reply..
2052 if (request->proxy_reply) {
2053 if (request->server) RDEBUG("server %s {",
2054 request->server != NULL ?
2055 request->server : "");
2056 request->process(request);
2058 if (request->server) RDEBUG("} # server %s",
2059 request->server != NULL ?
2060 request->server : "");
2063 return 2; /* success, but NOT '1' !*/
2067 * Return 1 if we did proxy it, or the proxy attempt failed
2068 * completely. Either way, the caller doesn't touch the request
2069 * any more if we return 1.
2071 static int successfully_proxied_request(REQUEST *request)
2074 int pre_proxy_type = 0;
2075 VALUE_PAIR *realmpair;
2076 VALUE_PAIR *strippedname;
2078 char *realmname = NULL;
2080 REALM *realm = NULL;
2084 * If it was already proxied, do nothing.
2086 * FIXME: This should really be a serious error.
2088 if (request->in_proxy_hash ||
2089 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2093 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2094 if (!realmpair || (realmpair->length == 0)) {
2097 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2100 switch (request->packet->code) {
2101 case PW_AUTHENTICATION_REQUEST:
2102 pool_type = HOME_TYPE_AUTH;
2105 #ifdef WITH_ACCOUNTING
2106 case PW_ACCOUNTING_REQUEST:
2107 pool_type = HOME_TYPE_ACCT;
2112 case PW_COA_REQUEST:
2113 case PW_DISCONNECT_REQUEST:
2114 pool_type = HOME_TYPE_COA;
2122 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2124 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2129 realmname = NULL; /* no realms */
2134 realmname = (char *) realmpair->vp_strvalue;
2136 realm = realm_find2(realmname);
2138 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2143 * Figure out which pool to use.
2145 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2146 pool = realm->auth_pool;
2148 #ifdef WITH_ACCOUNTING
2149 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2150 pool = realm->acct_pool;
2154 } else if ((request->packet->code == PW_COA_REQUEST) ||
2155 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2156 pool = realm->acct_pool;
2160 rad_panic("Internal sanity check failed");
2164 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2170 home = home_server_ldb(realmname, pool, request);
2172 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2176 request->home_pool = pool;
2180 * Once we've decided to proxy a request, we cannot send
2181 * a CoA packet. So we free up any CoA packet here.
2183 ev_request_free(&request->coa);
2186 * Remember that we sent the request to a Realm.
2188 if (realmname) pairadd(&request->packet->vps,
2189 pairmake("Realm", realmname, T_OP_EQ));
2192 * Strip the name, if told to.
2194 * Doing it here catches the case of proxied tunneled
2197 if (realm && (realm->striprealm == TRUE) &&
2198 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2200 * If there's a Stripped-User-Name attribute in
2201 * the request, then use THAT as the User-Name
2202 * for the proxied request, instead of the
2205 * This is done by making a copy of the
2206 * Stripped-User-Name attribute, turning it into
2207 * a User-Name attribute, deleting the
2208 * Stripped-User-Name and User-Name attributes
2209 * from the vps list, and making the new
2210 * User-Name the head of the vps list.
2212 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2214 vp = radius_paircreate(request, NULL,
2215 PW_USER_NAME, PW_TYPE_STRING);
2216 rad_assert(vp != NULL); /* handled by above function */
2217 /* Insert at the START of the list */
2218 vp->next = request->proxy->vps;
2219 request->proxy->vps = vp;
2221 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2222 sizeof(vp->vp_strvalue));
2223 vp->length = strippedname->length;
2226 * Do NOT delete Stripped-User-Name.
2231 * If there is no PW_CHAP_CHALLENGE attribute but
2232 * there is a PW_CHAP_PASSWORD we need to add it
2233 * since we can't use the request authenticator
2234 * anymore - we changed it.
2236 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2237 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2238 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2239 vp = radius_paircreate(request, &request->proxy->vps,
2240 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2241 vp->length = AUTH_VECTOR_LEN;
2242 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2246 * The RFC's say we have to do this, but FreeRADIUS
2249 vp = radius_paircreate(request, &request->proxy->vps,
2250 PW_PROXY_STATE, PW_TYPE_OCTETS);
2251 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2252 request->packet->id);
2253 vp->length = strlen(vp->vp_strvalue);
2256 * Should be done BEFORE inserting into proxy hash, as
2257 * pre-proxy may use this information, or change it.
2259 request->proxy->code = request->packet->code;
2262 * Call the pre-proxy routines.
2264 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2266 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2267 pre_proxy_type = vp->vp_integer;
2270 rad_assert(request->home_pool != NULL);
2272 if (request->home_pool->virtual_server) {
2273 const char *old_server = request->server;
2275 request->server = request->home_pool->virtual_server;
2276 RDEBUG2(" server %s {", request->server);
2277 rcode = module_pre_proxy(pre_proxy_type, request);
2279 request->server = old_server;
2281 rcode = module_pre_proxy(pre_proxy_type, request);
2284 case RLM_MODULE_FAIL:
2285 case RLM_MODULE_INVALID:
2286 case RLM_MODULE_NOTFOUND:
2287 case RLM_MODULE_USERLOCK:
2289 /* FIXME: debug print failed stuff */
2292 case RLM_MODULE_REJECT:
2293 case RLM_MODULE_HANDLED:
2297 * Only proxy the packet if the pre-proxy code succeeded.
2299 case RLM_MODULE_NOOP:
2301 case RLM_MODULE_UPDATED:
2306 * If it's a fake request, don't send the proxy
2307 * packet. The outer tunnel session will take
2308 * care of doing that.
2310 if (request->packet->dst_port == 0) {
2311 request->home_server = NULL;
2315 if (request->home_server->server) {
2316 return proxy_to_virtual_server(request);
2319 if (!proxy_request(request)) {
2320 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2328 static void request_post_handler(REQUEST *request)
2330 int child_state = -1;
2331 struct timeval when;
2334 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2336 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2337 RDEBUG2("Request %d was cancelled.", request->number);
2338 #ifdef HAVE_PTHREAD_H
2339 request->child_pid = NO_SUCH_CHILD_PID;
2341 child_state = REQUEST_DONE;
2345 if (request->child_state != REQUEST_RUNNING) {
2346 rad_panic("Internal sanity check failed");
2351 * If it's not in the request hash, it's a CoA request.
2354 if (!request->in_request_hash &&
2356 ((request->proxy->code == PW_COA_REQUEST) ||
2357 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2358 request->next_callback = NULL;
2359 child_state = REQUEST_DONE;
2365 * Catch Auth-Type := Reject BEFORE proxying the packet.
2367 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2368 (request->reply->code == 0) &&
2369 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2370 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2371 request->reply->code = PW_AUTHENTICATION_REJECT;
2375 if (request->root->proxy_requests &&
2376 !request->in_proxy_hash &&
2377 (request->reply->code == 0) &&
2378 (request->packet->dst_port != 0) &&
2379 (request->packet->code != PW_STATUS_SERVER)) {
2380 int rcode = successfully_proxied_request(request);
2382 if (rcode == 1) return; /* request is invalid */
2385 * Failed proxying it (dead home servers, etc.)
2386 * Run it through Post-Proxy-Type = Fail, and
2387 * respond to the request.
2389 * Note that we're in a child thread here, so we
2390 * do NOT re-schedule the request. Instead, we
2391 * do what we would have done, which is run the
2392 * pre-handler, a NULL request handler, and then
2395 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2396 request_pre_handler(request);
2400 * Else we weren't supposed to proxy it,
2401 * OR we proxied it internally to a virutal server.
2406 else if (request->proxy && request->coa) {
2407 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
2408 ev_request_free(&request->coa);
2414 * Fake requests don't get encoded or signed. The caller
2415 * also requires the reply VP's, so we don't free them
2418 if (request->packet->dst_port == 0) {
2419 /* FIXME: RDEBUG going to the next request */
2420 #ifdef HAVE_PTHREAD_H
2421 request->child_pid = NO_SUCH_CHILD_PID;
2423 request->child_state = REQUEST_DONE;
2429 * Copy Proxy-State from the request to the reply.
2431 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2432 if (vp) pairadd(&request->reply->vps, vp);
2436 * Access-Requests get delayed or cached.
2438 switch (request->packet->code) {
2439 case PW_AUTHENTICATION_REQUEST:
2440 gettimeofday(&request->next_when, NULL);
2442 if (request->reply->code == 0) {
2444 * Check if the lack of response is intentional.
2446 vp = pairfind(request->config_items,
2447 PW_RESPONSE_PACKET_TYPE);
2449 RDEBUG2("There was no response configured: rejecting request %d",
2451 request->reply->code = PW_AUTHENTICATION_REJECT;
2453 } else if (vp->vp_integer == 256) {
2454 RDEBUG2("Not responding to request %d",
2458 * Force cleanup after a long
2459 * time, so that we don't
2460 * re-process the packet.
2462 request->next_when.tv_sec += request->root->max_request_time;
2463 request->next_callback = cleanup_delay;
2464 child_state = REQUEST_CLEANUP_DELAY;
2467 request->reply->code = vp->vp_integer;
2473 * Run rejected packets through
2475 * Post-Auth-Type = Reject
2477 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2478 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2479 vp = radius_pairmake(request, &request->config_items,
2480 "Post-Auth-Type", "Reject",
2482 if (vp) rad_postauth(request);
2485 * If configured, delay Access-Reject packets.
2487 * If request->root->reject_delay = 0, we discover
2488 * that we have to send the packet now.
2490 when = request->received;
2491 when.tv_sec += request->root->reject_delay;
2493 if (timercmp(&when, &request->next_when, >)) {
2494 RDEBUG2("Delaying reject of request %d for %d seconds",
2496 request->root->reject_delay);
2497 request->next_when = when;
2498 request->next_callback = reject_delay;
2499 #ifdef HAVE_PTHREAD_H
2500 request->child_pid = NO_SUCH_CHILD_PID;
2502 request->child_state = REQUEST_REJECT_DELAY;
2508 case PW_COA_REQUEST:
2509 case PW_DISCONNECT_REQUEST:
2511 request->next_when.tv_sec += request->root->cleanup_delay;
2512 request->next_callback = cleanup_delay;
2513 child_state = REQUEST_CLEANUP_DELAY;
2516 case PW_ACCOUNTING_REQUEST:
2517 request->next_callback = NULL; /* just to be safe */
2518 child_state = REQUEST_DONE;
2522 * FIXME: Status-Server should probably not be
2525 case PW_STATUS_SERVER:
2526 request->next_callback = NULL;
2527 child_state = REQUEST_DONE;
2534 request->next_callback = NULL;
2535 child_state = REQUEST_DONE;
2539 DEBUG_PACKET(request, request->reply, 1);
2540 request->listener->send(request->listener, request);
2544 * Now that we've completely processed the request,
2545 * see if we need to originate a CoA request. But ONLY
2546 * if it wasn't proxied.
2548 if (!request->proxy &&
2550 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL))) {
2551 if (!originated_coa_request(request)) {
2552 RDEBUG2("Do CoA Fail handler here");
2554 /* request->coa is stil set, so we can update events */
2560 * Clean up. These are no longer needed.
2562 pairfree(&request->config_items);
2564 pairfree(&request->packet->vps);
2565 request->username = NULL;
2566 request->password = NULL;
2568 pairfree(&request->reply->vps);
2571 if (request->proxy) {
2572 pairfree(&request->proxy->vps);
2574 if (request->proxy_reply) {
2575 pairfree(&request->proxy_reply->vps);
2580 * We're not tracking responses from the home
2581 * server, we can therefore free this memory in
2584 if (!request->in_proxy_hash) {
2585 rad_free(&request->proxy);
2586 rad_free(&request->proxy_reply);
2587 request->home_server = NULL;
2593 RDEBUG2("Finished request %d.", request->number);
2594 rad_assert(child_state >= 0);
2595 request->child_state = child_state;
2598 * Single threaded mode: update timers now.
2600 if (!have_children) wait_a_bit(request);
2604 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2610 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2611 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2613 switch (request->child_state) {
2614 case REQUEST_QUEUED:
2615 case REQUEST_RUNNING:
2619 radlog(L_ERR, "Discarding duplicate request from "
2620 "client %s port %d - ID: %d due to unfinished request %d",
2622 request->packet->src_port,request->packet->id,
2627 case REQUEST_PROXIED:
2629 * We're not supposed to have duplicate
2630 * accounting packets. The other states handle
2631 * duplicates fine (discard, or send duplicate
2632 * reply). But we do NOT want to retransmit an
2633 * accounting request here, because that would
2634 * involve updating the Acct-Delay-Time, and
2635 * therefore changing the packet Id, etc.
2637 * Instead, we just discard the packet. We may
2638 * eventually respond, or the client will send a
2639 * new accounting packet.
2641 * The same comments go for Status-Server, and
2642 * other packet types.
2644 * FIXME: coa: when we proxy CoA && Disconnect
2645 * packets, this logic has to be fixed.
2647 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2651 check_for_zombie_home_server(request);
2654 * If we've just discovered that the home server
2655 * is dead, OR the socket has been closed, look for
2656 * another connection to a home server.
2658 if (((request->packet->dst_port != 0) &&
2659 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2660 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2663 remove_from_proxy_hash(request);
2665 home = home_server_ldb(NULL, request->home_pool, request);
2667 RDEBUG2("Failed to find live home server for request %d", request->number);
2670 * Do post-request processing,
2671 * and any insertion of necessary
2674 post_proxy_fail_handler(request);
2678 request->proxy->code = request->packet->code;
2681 * Free the old packet, to force re-encoding
2683 free(request->proxy->data);
2684 request->proxy->data = NULL;
2685 request->proxy->data_len = 0;
2688 * This request failed over to a virtual
2689 * server. Push it back onto the queue
2692 if (request->home_server->server) {
2693 proxy_fallback_handler(request);
2698 * Try to proxy the request.
2700 if (!proxy_request(request)) {
2701 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2702 goto no_home_servers;
2706 * This code executes in the main server
2707 * thread, so there's no need for locking.
2709 rad_assert(request->next_callback != NULL);
2710 INSERT_EVENT(request->next_callback, request);
2711 request->next_callback = NULL;
2713 } /* else the home server is still alive */
2716 if (request->home_server->proto == IPPROTO_TCP) {
2717 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2718 inet_ntop(request->proxy->dst_ipaddr.af,
2719 &request->proxy->dst_ipaddr.ipaddr,
2720 buffer, sizeof(buffer)),
2721 request->proxy->dst_port,
2722 request->proxy->id);
2727 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2728 inet_ntop(request->proxy->dst_ipaddr.af,
2729 &request->proxy->dst_ipaddr.ipaddr,
2730 buffer, sizeof(buffer)),
2731 request->proxy->dst_port,
2732 request->proxy->id);
2733 request->num_proxied_requests++;
2735 DEBUG_PACKET(request, request->proxy, 1);
2736 request->proxy_listener->send(request->proxy_listener,
2741 case REQUEST_REJECT_DELAY:
2742 RDEBUG2("Waiting to send Access-Reject "
2743 "to client %s port %d - ID: %d",
2745 request->packet->src_port, request->packet->id);
2748 case REQUEST_CLEANUP_DELAY:
2750 if (request->reply->code == 0) {
2751 RDEBUG2("Ignoring retransmit from client %s port %d "
2752 "- ID: %d, no reply was configured",
2754 request->packet->src_port, request->packet->id);
2759 * FIXME: This sends duplicate replies to
2760 * accounting requests, even if Acct-Delay-Time
2761 * or Event-Timestamp is in the packet. In those
2762 * cases, the Id should be changed, and the packet
2765 RDEBUG2("Sending duplicate reply "
2766 "to client %s port %d - ID: %d",
2768 request->packet->src_port, request->packet->id);
2769 DEBUG_PACKET(request, request->reply, 1);
2770 request->listener->send(request->listener, request);
2776 static void received_conflicting_request(REQUEST *request,
2777 const RADCLIENT *client)
2779 radlog(L_ERR, "Received conflicting packet from "
2780 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2782 request->packet->src_port, request->packet->id,
2786 * Nuke it from the request hash, so we can receive new
2789 remove_from_request_hash(request);
2791 switch (request->child_state) {
2793 * Tell it to stop, and wait for it to do so.
2796 request->master_state = REQUEST_STOP_PROCESSING;
2797 request->delay += request->delay >> 1;
2799 tv_add(&request->when, request->delay);
2801 INSERT_EVENT(wait_for_child_to_die, request);
2805 * Catch race conditions. It may have switched
2806 * from running to done while this code is being
2809 case REQUEST_REJECT_DELAY:
2810 case REQUEST_CLEANUP_DELAY:
2817 static int can_handle_new_request(RADIUS_PACKET *packet,
2819 struct main_config_t *root)
2822 * Count the total number of requests, to see if
2823 * there are too many. If so, return with an
2826 if (root->max_requests) {
2827 int request_count = fr_packet_list_num_elements(pl);
2830 * This is a new request. Let's see if
2831 * it makes us go over our configured
2834 if (request_count > root->max_requests) {
2835 radlog(L_ERR, "Dropping request (%d is too many): "
2836 "from client %s port %d - ID: %d", request_count,
2838 packet->src_port, packet->id);
2839 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2840 "\tThe value for 'max_requests' is probably set too low.\n");
2842 } /* else there were a small number of requests */
2843 } /* else there was no configured limit for requests */
2846 * FIXME: Add per-client checks. If one client is sending
2847 * too many packets, start discarding them.
2849 * We increment the counters here, and decrement them
2850 * when the response is sent... somewhere in this file.
2854 * FUTURE: Add checks for system load. If the system is
2855 * busy, start dropping requests...
2857 * We can probably keep some statistics ourselves... if
2858 * there are more requests coming in than we can handle,
2859 * start dropping some.
2866 int received_request(rad_listen_t *listener,
2867 RADIUS_PACKET *packet, REQUEST **prequest,
2870 RADIUS_PACKET **packet_p;
2871 REQUEST *request = NULL;
2872 struct main_config_t *root = &mainconfig;
2874 packet_p = fr_packet_list_find(pl, packet);
2876 request = fr_packet2myptr(REQUEST, packet, packet_p);
2877 rad_assert(request->in_request_hash);
2879 if ((request->packet->data_len == packet->data_len) &&
2880 (memcmp(request->packet->vector, packet->vector,
2881 sizeof(packet->vector)) == 0)) {
2882 received_retransmit(request, client);
2887 * The new request is different from the old one,
2888 * but maybe the old is finished. If so, delete
2891 switch (request->child_state) {
2892 struct timeval when;
2896 * Special hacks for race conditions.
2897 * The reply is encoded, and therefore
2898 * likely sent. We received a *new*
2899 * packet from the client, likely before
2900 * the next line or two of code which
2901 * updated the child state. In this
2902 * case, just accept the new request.
2904 if ((request->reply->code != 0) &&
2905 request->reply->data) {
2906 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2908 packet->src_port, packet->id,
2910 remove_from_request_hash(request);
2915 gettimeofday(&when, NULL);
2919 * If the cached request was received
2920 * within the last second, then we
2921 * discard the NEW request instead of the
2922 * old one. This will happen ONLY when
2923 * the client is severely broken, and is
2924 * sending conflicting packets very
2927 if (timercmp(&when, &request->received, <)) {
2928 radlog(L_ERR, "Discarding conflicting packet from "
2929 "client %s port %d - ID: %d due to recent request %d.",
2931 packet->src_port, packet->id,
2936 received_conflicting_request(request, client);
2940 case REQUEST_REJECT_DELAY:
2941 case REQUEST_CLEANUP_DELAY:
2942 request->child_state = REQUEST_DONE;
2944 cleanup_delay(request);
2951 * We may want to quench the new request.
2953 if ((listener->type != RAD_LISTEN_DETAIL) &&
2954 !can_handle_new_request(packet, client, root)) {
2959 * Create and initialize the new request.
2961 request = request_alloc(); /* never fails */
2963 if ((request->reply = rad_alloc(0)) == NULL) {
2964 radlog(L_ERR, "No memory");
2968 request->listener = listener;
2969 request->client = client;
2970 request->packet = packet;
2971 request->packet->timestamp = request->timestamp;
2972 request->number = request_num_counter++;
2973 request->priority = listener->type;
2974 #ifdef HAVE_PTHREAD_H
2975 request->child_pid = NO_SUCH_CHILD_PID;
2979 * Status-Server packets go to the head of the queue.
2981 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2984 * Set virtual server identity
2986 if (client->server) {
2987 request->server = client->server;
2988 } else if (listener->server) {
2989 request->server = listener->server;
2991 request->server = NULL;
2995 * Remember the request in the list.
2997 if (!fr_packet_list_insert(pl, &request->packet)) {
2998 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2999 ev_request_free(&request);
3003 request->in_request_hash = TRUE;
3004 request->root = root;
3007 request->listener->count++;
3011 * The request passes many of our sanity checks.
3012 * From here on in, if anything goes wrong, we
3013 * send a reject message, instead of dropping the
3018 * Build the reply template from the request.
3021 request->reply->sockfd = request->packet->sockfd;
3022 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3023 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3024 request->reply->dst_port = request->packet->src_port;
3025 request->reply->src_port = request->packet->dst_port;
3026 request->reply->id = request->packet->id;
3027 request->reply->code = 0; /* UNKNOWN code */
3028 memcpy(request->reply->vector, request->packet->vector,
3029 sizeof(request->reply->vector));
3030 request->reply->vps = NULL;
3031 request->reply->data = NULL;
3032 request->reply->data_len = 0;
3034 request->master_state = REQUEST_ACTIVE;
3035 request->child_state = REQUEST_QUEUED;
3036 request->next_callback = NULL;
3038 gettimeofday(&request->received, NULL);
3039 request->timestamp = request->received.tv_sec;
3040 request->when = request->received;
3042 request->delay = USEC;
3044 tv_add(&request->when, request->delay);
3046 INSERT_EVENT(wait_a_bit, request);
3048 *prequest = request;
3054 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3060 * Also removes from the proxy hash if responses == requests
3062 request = lookup_in_proxy_hash(packet);
3065 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3066 inet_ntop(packet->src_ipaddr.af,
3067 &packet->src_ipaddr.ipaddr,
3068 buffer, sizeof(buffer)),
3069 packet->src_port, packet->id);
3074 * We haven't replied to the NAS, but we have seen an
3075 * earlier reply from the home server. Ignore this packet,
3076 * as we're likely still processing the previous reply.
3078 if (request->proxy_reply) {
3079 if (memcmp(request->proxy_reply->vector,
3081 sizeof(request->proxy_reply->vector)) == 0) {
3082 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
3083 inet_ntop(packet->src_ipaddr.af,
3084 &packet->src_ipaddr.ipaddr,
3085 buffer, sizeof(buffer)),
3086 packet->src_port, packet->id,
3090 * ? The home server gave us a new proxy
3091 * reply which doesn't match the old
3094 RDEBUG2("Ignoring conflicting proxy reply");
3097 /* assert that there's an event queued for request? */
3102 * Verify the packet before doing ANYTHING with it. This
3103 * means we're doing more MD5 checks in the server core.
3104 * However, we can fix that by moving to multiple threads
3105 * listening on sockets.
3107 * We do this AFTER looking the request up in the hash,
3108 * and AFTER vhecking if we saw a previous request. This
3109 * helps minimize the DoS effect of people attacking us
3110 * with spoofed packets.
3112 if (rad_verify(packet, request->proxy,
3113 request->home_server->secret) != 0) {
3114 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3118 gettimeofday(&now, NULL);
3121 * Maybe move this earlier in the decision process?
3122 * Having it here means that late or duplicate proxy
3123 * replies no longer get the home server marked as
3124 * "alive". This might be good for stability, though.
3126 * FIXME: Do we really want to do this whenever we
3127 * receive a packet? Setting this here means that we
3128 * mark it alive on *any* packet, even if it's lost all
3129 * of the *other* packets in the last 10s.
3131 if (request->proxy->code != PW_STATUS_SERVER) {
3132 request->home_server->state = HOME_STATE_ALIVE;
3137 * When originating CoA, the "proxy" reply is the reply
3138 * to the CoA request that we originated. At this point,
3139 * the original request is finished, and it has a reply.
3141 * However, if we haven't separated the two requests, do
3142 * so now. This is done so that cleaning up the original
3143 * request won't cause the CoA request to be free'd. See
3144 * util.c, request_free()
3146 if (request->parent && (request->parent->coa == request)) {
3147 request->parent->coa = NULL;
3148 request->parent = NULL;
3151 * The proxied packet was different from the
3152 * original packet, AND the proxied packet was
3155 } else if ((request->packet->code != request->proxy->code) &&
3156 ((request->proxy->code == PW_COA_REQUEST) ||
3157 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
3159 * It's already divorced: do nothing.
3164 * Skip the next set of checks, as the original
3165 * reply is cached. We want to be able to still
3166 * process the CoA reply, AND to reference the
3167 * original request/reply.
3169 * This is getting to be really quite a bit of a
3175 * If there's a reply to the NAS, ignore everything
3176 * related to proxy responses
3178 if (request->reply && request->reply->code != 0) {
3179 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3185 * The average includes our time to receive packets and
3186 * look them up in the hashes, which should be the same
3189 * We update the response time only for the FIRST packet
3192 if (request->home_server->ema.window > 0) {
3193 radius_stats_ema(&request->home_server->ema,
3194 &now, &request->proxy_when);
3198 switch (request->child_state) {
3199 case REQUEST_QUEUED:
3200 case REQUEST_RUNNING:
3201 radlog(L_ERR, "Internal sanity check failed for child state");
3204 case REQUEST_REJECT_DELAY:
3205 case REQUEST_CLEANUP_DELAY:
3207 radlog(L_ERR, "Reply from home server %s port %d - ID: %d arrived too late for request %d. Try increasing 'retry_delay' or 'max_request_time'",
3208 inet_ntop(packet->src_ipaddr.af,
3209 &packet->src_ipaddr.ipaddr,
3210 buffer, sizeof(buffer)),
3211 packet->src_port, packet->id,
3213 /* assert that there's an event queued for request? */
3216 case REQUEST_PROXIED:
3220 request->proxy_reply = packet;
3224 * Perform RTT calculations, as per RFC 2988 (for TCP).
3225 * Note that we only do so on the first response.
3227 if ((request->num_proxied_responses == 1)
3229 home_server *home = request->home_server;
3231 rtt = now.tv_sec - request->proxy_when.tv_sec;
3234 rtt -= request->proxy_when.tv_usec;
3236 if (!home->has_rtt) {
3237 home->has_rtt = TRUE;
3240 home->rttvar = rtt / 2;
3243 home->rttvar -= home->rttvar >> 2;
3244 home->rttvar += (home->srtt - rtt);
3245 home->srtt -= home->srtt >> 3;
3246 home->srtt += rtt >> 3;
3249 home->rto = home->srtt;
3250 if (home->rttvar > (USEC / 4)) {
3251 home->rto += home->rttvar * 4;
3259 * There's no incoming request, so it's a proxied packet
3262 if (!request->packet) {
3263 received_response_to_ping(request);
3264 request->proxy_reply = NULL; /* caller will free it */
3265 ev_request_free(&request);
3269 request->child_state = REQUEST_QUEUED;
3270 request->when = now;
3271 request->delay = USEC;
3272 request->priority = RAD_LISTEN_PROXY;
3273 tv_add(&request->when, request->delay);
3276 * Wait a bit will take care of max_request_time
3278 INSERT_EVENT(wait_a_bit, request);
3283 #endif /* WITH_PROXY */
3286 static void tcp_socket_lifetime(void *ctx)
3288 rad_listen_t *listener = ctx;
3291 listener->print(listener, buffer, sizeof(buffer));
3293 DEBUG("Reached maximum lifetime on socket %s", buffer);
3295 listener->status = RAD_LISTEN_STATUS_CLOSED;
3296 event_new_fd(listener);
3299 static void tcp_socket_idle_timeout(void *ctx)
3301 rad_listen_t *listener = ctx;
3302 listen_socket_t *sock = listener->data;
3305 fr_event_now(el, &now); /* should always succeed... */
3307 rad_assert(sock->home != NULL);
3310 * We implement idle timeout by polling, because it's
3311 * cheaper than resetting the idle timeout every time
3312 * we send / receive a packet.
3314 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3315 struct timeval when;
3316 void *fun = tcp_socket_idle_timeout;
3318 when.tv_sec = sock->last_packet;
3319 when.tv_sec += sock->home->idle_timeout;
3322 if (sock->home->lifetime &&
3323 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3324 when.tv_sec = sock->opened + sock->home->lifetime;
3325 fun = tcp_socket_lifetime;
3328 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3329 rad_panic("Failed to insert event");
3335 listener->print(listener, buffer, sizeof(buffer));
3337 DEBUG("Reached idle timeout on socket %s", buffer);
3339 listener->status = RAD_LISTEN_STATUS_CLOSED;
3340 event_new_fd(listener);
3344 void event_new_fd(rad_listen_t *this)
3348 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3350 this->print(this, buffer, sizeof(buffer));
3352 if (this->status == RAD_LISTEN_STATUS_INIT) {
3354 DEBUG("Listening on %s", buffer);
3356 radlog(L_INFO, " ... adding new socket %s", buffer);
3361 * Add it to the list of sockets we can use.
3362 * Server sockets (i.e. auth/acct) are never
3363 * added to the packet list.
3365 if (this->type == RAD_LISTEN_PROXY) {
3366 listen_socket_t *sock = this->data;
3368 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3369 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3371 &sock->other_ipaddr, sock->other_port,
3374 proxy_no_new_sockets = TRUE;
3376 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3379 * This is bad. However, the
3380 * packet list now supports 256
3381 * open sockets, which should
3382 * minimize this problem.
3384 radlog(L_ERR, "Failed adding proxy socket: %s",
3390 sock->home->num_connections++;
3393 * If necessary, add it to the list of
3394 * new proxy listeners.
3396 if (sock->home->lifetime || sock->home->idle_timeout) {
3397 this->next = proxy_listener_list;
3398 proxy_listener_list = this;
3401 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3404 * Tell the main thread that we've added
3405 * a proxy listener, but only if we need
3406 * to update the event list. Do this
3407 * with the mutex unlocked, to reduce
3411 if (sock->home->lifetime || sock->home->idle_timeout) {
3412 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3420 * Detail files are always known, and aren't
3421 * put into the socket event loop.
3423 if (this->type == RAD_LISTEN_DETAIL) {
3424 this->status = RAD_LISTEN_STATUS_KNOWN;
3427 * Set up the first poll interval.
3429 event_poll_detail(this);
3434 FD_MUTEX_LOCK(&fd_mutex);
3435 if (!fr_event_fd_insert(el, 0, this->fd,
3436 event_socket_handler, this)) {
3437 radlog(L_ERR, "Failed adding event handler for proxy socket!");
3440 FD_MUTEX_UNLOCK(&fd_mutex);
3442 this->status = RAD_LISTEN_STATUS_KNOWN;
3447 * Something went wrong with the socket: make it harmless.
3449 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3453 * Remove it from the list of live FD's.
3455 FD_MUTEX_LOCK(&fd_mutex);
3456 fr_event_fd_delete(el, 0, this->fd);
3457 FD_MUTEX_UNLOCK(&fd_mutex);
3461 * We track requests using this socket only for
3462 * TCP. For UDP, we don't currently close
3466 if (this->type != RAD_LISTEN_PROXY)
3469 if (this->count != 0) {
3470 fr_packet_list_walk(pl, this,
3471 remove_all_requests);
3474 if (this->count == 0) {
3475 this->status = RAD_LISTEN_STATUS_FINISH;
3481 int count = this->count;
3486 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3487 if (!fr_packet_list_socket_freeze(proxy_list,
3489 radlog(L_ERR, "Fatal error freezing socket: %s",
3495 * Doing this with the proxy mutex held
3496 * is a Bad Thing. We should move to
3497 * finer-grained mutexes.
3499 count = this->count;
3501 fr_packet_list_walk(proxy_list, this,
3502 remove_all_proxied_requests);
3504 count = this->count; /* protected by mutex */
3505 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3508 this->status = RAD_LISTEN_STATUS_FINISH;
3512 #endif /* WITH_PROXY */
3513 #endif /* WITH_TCP */
3516 * Re-open the socket, pointing it to /dev/null.
3517 * This means that all writes proceed without
3518 * blocking, and all reads return "no data".
3520 * This leaves the socket active, so any child
3521 * threads won't go insane. But it means that
3522 * they cannot send or receive any packets.
3524 * This is EXTRA work in the normal case, when
3525 * sockets are closed without error. But it lets
3526 * us have one simple processing method for all
3529 devnull = open("/dev/null", O_RDWR);
3531 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3535 if (dup2(devnull, this->fd) < 0) {
3536 radlog(L_ERR, "FATAL failure closing socket: %s",
3542 this->status = RAD_LISTEN_STATUS_CLOSED;
3545 * Fall through to the next section.
3551 * Called ONLY from the main thread. On the following
3557 * (and falling through from "forcibly close FD" above)
3558 * client closed connection on us
3559 * client sent us a bad packet.
3561 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3562 int count = this->count;
3563 rad_assert(this->type != RAD_LISTEN_DETAIL);
3567 * Remove it from the list of active sockets, so
3568 * that it isn't used when proxying new packets.
3570 if (this->type == RAD_LISTEN_PROXY) {
3571 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3572 if (!fr_packet_list_socket_freeze(proxy_list,
3574 radlog(L_ERR, "Fatal error freezing socket: %s",
3578 count = this->count; /* protected by mutex */
3579 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3584 * Requests are still using the socket. Wait for
3588 struct timeval when;
3589 listen_socket_t *sock = this->data;
3592 * Try again to clean up the socket in 30
3595 gettimeofday(&when, NULL);
3598 if (!fr_event_insert(el,
3599 (fr_event_callback_t) event_new_fd,
3600 this, &when, &sock->ev)) {
3601 rad_panic("Failed to insert event");
3608 * No one is using this socket: we can delete it
3611 this->status = RAD_LISTEN_STATUS_FINISH;
3615 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3616 listen_socket_t *sock = this->data;
3618 rad_assert(this->count == 0);
3619 radlog(L_INFO, " ... closing socket %s", buffer);
3622 * Remove it from the list of live FD's. Note
3623 * that it MAY also have been removed above. We
3624 * do it again here, to catch the case of sockets
3625 * closing on idle timeout, or max
3626 * lifetime... AFTER all requests have finished
3629 FD_MUTEX_LOCK(&fd_mutex);
3630 fr_event_fd_delete(el, 0, this->fd);
3631 FD_MUTEX_UNLOCK(&fd_mutex);
3635 * Remove it from the list of sockets to be used
3638 if (this->type == RAD_LISTEN_PROXY) {
3639 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3640 if (!fr_packet_list_socket_remove(proxy_list,
3642 radlog(L_ERR, "Fatal error removing socket: %s",
3646 if (sock->home) sock->home->num_connections--;
3647 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3652 * Remove any pending cleanups.
3654 if (sock->ev) fr_event_delete(el, &sock->ev);
3657 * And finally, close the socket.
3661 #endif /* WITH_TCP */
3664 static void handle_signal_self(int flag)
3666 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3667 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3668 radlog(L_INFO, "Received TERM signal");
3669 fr_event_loop_exit(el, 1);
3671 fr_event_loop_exit(el, 2);
3675 } /* else exit/term flags weren't set */
3678 * Tell the even loop to stop processing.
3680 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3682 static time_t last_hup = 0;
3685 if ((int) (when - last_hup) < 5) {
3686 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3690 radlog(L_INFO, "Received HUP signal.");
3694 fr_event_loop_exit(el, 0x80);
3698 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3702 * FIXME: O(N) loops suck.
3704 for (this = mainconfig.listen;
3706 this = this->next) {
3707 if (this->type != RAD_LISTEN_DETAIL) continue;
3710 * This one didn't send the signal, skip
3713 if (!this->decode(this, NULL)) continue;
3716 * Go service the interrupt.
3718 event_poll_detail(this);
3726 * Add event handlers for idle timeouts && maximum lifetime.
3728 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3729 struct timeval when;
3732 fr_event_now(el, &now);
3734 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3736 while (proxy_listener_list) {
3737 rad_listen_t *this = proxy_listener_list;
3738 listen_socket_t *sock = this->data;
3740 proxy_listener_list = this->next;
3743 if (!sock->home) continue; /* skip UDP sockets */
3747 if (!sock->home->idle_timeout) {
3748 rad_assert(sock->home->lifetime != 0);
3750 when.tv_sec += sock->home->lifetime;
3751 fun = tcp_socket_lifetime;
3753 rad_assert(sock->home->idle_timeout != 0);
3755 when.tv_sec += sock->home->idle_timeout;
3756 fun = tcp_socket_idle_timeout;
3759 if (!fr_event_insert(el, fun, this, &when,
3761 rad_panic("Failed to insert event");
3765 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3767 #endif /* WITH_PROXY */
3768 #endif /* WITH_TCP */
3772 void radius_signal_self(int flag)
3774 handle_signal_self(flag);
3778 * Inform ourselves that we received a signal.
3780 void radius_signal_self(int flag)
3786 * The read MUST be non-blocking for this to work.
3788 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3792 for (i = 0; i < rcode; i++) {
3793 buffer[0] |= buffer[i];
3801 write(self_pipe[1], buffer, 1);
3805 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3806 UNUSED int fd, UNUSED void *ctx)
3811 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3812 if (rcode <= 0) return;
3815 * Merge pending signals.
3817 for (i = 0; i < rcode; i++) {
3818 buffer[0] |= buffer[i];
3821 handle_signal_self(buffer[0]);
3826 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3829 rad_listen_t *listener = ctx;
3830 RAD_REQUEST_FUNP fun;
3833 rad_assert(xel == el);
3837 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3839 if (!listener->recv(listener, &fun, &request)) return;
3841 if (!thread_pool_addrequest(request, fun)) {
3842 request->child_state = REQUEST_DONE;
3848 * This function is called periodically to see if this detail
3849 * file is available for reading.
3851 static void event_poll_detail(void *ctx)
3854 RAD_REQUEST_FUNP fun;
3856 rad_listen_t *this = ctx;
3857 struct timeval when;
3858 listen_detail_t *detail = this->data;
3860 rad_assert(this->type == RAD_LISTEN_DETAIL);
3863 * Try to read something.
3865 * FIXME: This does poll AND receive.
3867 rcode = this->recv(this, &fun, &request);
3869 rad_assert(fun != NULL);
3870 rad_assert(request != NULL);
3872 if (!thread_pool_addrequest(request, fun)) {
3873 request->child_state = REQUEST_DONE;
3877 fr_event_now(el, &now);
3881 * Backdoor API to get the delay until the next poll
3884 delay = this->encode(this, NULL);
3885 tv_add(&when, delay);
3887 if (!fr_event_insert(el, event_poll_detail, this,
3888 &when, &detail->ev)) {
3889 radlog(L_ERR, "Failed creating handler");
3895 static void event_status(struct timeval *wake)
3897 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3901 if (debug_flag == 0) {
3903 radlog(L_INFO, "Ready to process requests.");
3904 just_started = FALSE;
3910 radlog(L_INFO, "Ready to process requests.");
3912 } else if ((wake->tv_sec != 0) ||
3913 (wake->tv_usec >= 100000)) {
3914 DEBUG("Waking up in %d.%01u seconds.",
3915 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3920 * FIXME: Put this somewhere else, where it isn't called
3921 * all of the time...
3924 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3926 * If there are no child threads, then there may
3927 * be child processes. In that case, wait for
3928 * their exit status, and throw that exit status
3929 * away. This helps get rid of zxombie children.
3931 while (waitpid(-1, &argval, WNOHANG) > 0) {
3939 * Externally-visibly functions.
3941 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3943 rad_listen_t *head = NULL;
3947 time(&fr_start_time);
3949 el = fr_event_list_create(event_status);
3952 pl = fr_packet_list_create(0);
3953 if (!pl) return 0; /* leak el */
3955 request_num_counter = 0;
3958 if (mainconfig.proxy_requests) {
3960 * Create the tree for managing proxied requests and
3963 proxy_list = fr_packet_list_create(1);
3964 if (!proxy_list) return 0;
3966 #ifdef HAVE_PTHREAD_H
3967 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3968 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3976 #ifdef HAVE_PTHREAD_H
3978 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3980 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3983 * Initialize the threads ONLY if we're spawning, AND
3984 * we're running normally.
3986 if (spawn_flag && !check_config &&
3987 (thread_pool_init(cs, &spawn_flag) < 0)) {
3993 * Move all of the thread calls to this file?
3995 * It may be best for the mutexes to be in this file...
3997 have_children = spawn_flag;
4000 DEBUG("%s: #### Skipping IP addresses and Ports ####",
4007 * Child threads need a pipe to signal us, as do the
4010 if (pipe(self_pipe) < 0) {
4011 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
4015 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4016 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4020 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4021 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4026 if (!fr_event_fd_insert(el, 0, self_pipe[0],
4027 event_signal_handler, el)) {
4028 radlog(L_ERR, "Failed creating handler for signals");
4033 DEBUG("%s: #### Opening IP addresses and Ports ####",
4037 * The server temporarily switches to an unprivileged
4038 * user very early in the bootstrapping process.
4039 * However, some sockets MAY require privileged access
4040 * (bind to device, or to port < 1024, or to raw
4041 * sockets). Those sockets need to call suid up/down
4042 * themselves around the functions that need a privileged
4045 if (listen_init(cs, &head) < 0) {
4049 mainconfig.listen = head;
4052 * At this point, no one has any business *ever* going
4055 fr_suid_down_permanent();
4061 static int request_hash_cb(UNUSED void *ctx, void *data)
4063 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4066 rad_assert(request->in_proxy_hash == FALSE);
4069 ev_request_free(&request);
4076 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4078 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4080 ev_request_free(&request);
4086 void radius_event_free(void)
4089 * FIXME: Stop all threads, or at least check that
4090 * they're all waiting on the semaphore, and the queues
4096 * There are requests in the proxy hash that aren't
4097 * referenced from anywhere else. Remove them first.
4100 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4101 fr_packet_list_free(proxy_list);
4106 fr_packet_list_walk(pl, NULL, request_hash_cb);
4108 fr_packet_list_free(pl);
4111 fr_event_list_free(el);
4114 int radius_event_process(void)
4118 return fr_event_loop(el);
4121 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4123 request->options = RAD_REQUEST_OPTION_DEBUG2;
4125 if (request_pre_handler(request)) {
4126 rad_assert(fun != NULL);
4127 rad_assert(request != NULL);
4129 if (request->server) RDEBUG("server %s {",
4130 request->server != NULL ?
4131 request->server : "");
4134 if (request->server) RDEBUG("} # server %s",
4135 request->server != NULL ?
4136 request->server : "");
4138 request_post_handler(request);
4141 DEBUG2("Going to the next request");