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 %d ID %d with timestamp +%d",
470 request->number, request->packet->id,
471 (unsigned int) (request->timestamp - fr_start_time));
473 RDEBUG2("Cleaning up request %d 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 %d in component %s module %s.",
508 request->number, request->component, request->module);
510 RDEBUG2("Child is still stuck for request %d",
513 tv_add(&request->when, request->delay);
515 INSERT_EVENT(wait_for_child_to_die, request);
519 RDEBUG2("Child is responsive for request %d", 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 %d 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 %d", 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 %d (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;
1257 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1259 * A child thread MAY still be running on the
1260 * request. Ask the thread to stop working on
1263 if (have_children &&
1264 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1265 request->master_state = REQUEST_STOP_PROCESSING;
1267 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1269 request->module ? request->module : "<server core>",
1270 request->component ? request->component : "<server core>");
1272 request->delay = USEC / 4;
1273 tv_add(&request->when, request->delay);
1274 callback = wait_for_child_to_die;
1280 * Else no child thread is processing the
1281 * request. We probably should have just marked
1282 * the request as 'done' elsewhere, like in the
1283 * post-proxy-fail handler. But doing that would
1284 * involve checking for max_request_time in
1285 * multiple places, so this may be simplest.
1287 request->child_state = REQUEST_DONE;
1291 * Mark the request as no longer running,
1295 #ifdef HAVE_PTHREAD_H
1296 request->child_pid = NO_SUCH_CHILD_PID;
1301 * This is a CoA request. It's been divorced
1302 * from everything else, so we clean it up now.
1304 if (!request->in_request_hash &&
1306 (request->packet->code != request->proxy->code) &&
1307 ((request->proxy->code == PW_COA_REQUEST) ||
1308 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1310 * FIXME: Do CoA MIBs
1312 ev_request_free(&request);
1316 request_stats_final(request);
1317 cleanup_delay(request);
1320 case REQUEST_REJECT_DELAY:
1321 case REQUEST_CLEANUP_DELAY:
1322 #ifdef HAVE_PTHREAD_H
1323 request->child_pid = NO_SUCH_CHILD_PID;
1325 request_stats_final(request);
1327 case REQUEST_PROXIED:
1328 rad_assert(request->next_callback != NULL);
1329 rad_assert(request->next_callback != wait_a_bit);
1331 request->when = request->next_when;
1332 callback = request->next_callback;
1333 request->next_callback = NULL;
1337 rad_panic("Internal sanity check failure");
1342 * Something major went wrong. Discard the request, and
1345 * FIXME: No idea why this happens or how to fix it...
1346 * It seems to happen *only* when requests are proxied,
1347 * and where the home server doesn't respond. So it looks
1348 * like a race condition above, but it happens in debug
1349 * mode, with no threads...
1352 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1353 ev_request_free(&request);
1357 INSERT_EVENT(callback, request);
1361 static void no_response_to_coa_request(void *ctx)
1363 REQUEST *request = ctx;
1366 rad_assert(request->magic == REQUEST_MAGIC);
1367 rad_assert(request->child_state == REQUEST_PROXIED);
1368 rad_assert(request->home_server != NULL);
1369 rad_assert(!request->in_request_hash);
1371 radlog(L_ERR, "No response to CoA request sent to %s",
1372 inet_ntop(request->proxy->dst_ipaddr.af,
1373 &request->proxy->dst_ipaddr.ipaddr,
1374 buffer, sizeof(buffer)));
1379 request->packet->code |= (PW_COA_REQUEST << 8);
1380 post_proxy_fail_handler(request);
1384 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1388 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1395 packet->data = NULL;
1396 packet->data_len = 0;
1399 return 1; /* time stamp updated */
1404 * Called when we haven't received a response to a CoA request.
1406 static void retransmit_coa_request(void *ctx)
1410 REQUEST *request = ctx;
1412 rad_assert(request->magic == REQUEST_MAGIC);
1413 rad_assert(request->child_state == REQUEST_PROXIED);
1414 rad_assert(request->home_server != NULL);
1415 rad_assert(!request->in_request_hash);
1416 rad_assert(request->parent == NULL);
1418 fr_event_now(el, &now);
1421 * Cap count at MRC, if it is non-zero.
1423 if (request->home_server->coa_mrc &&
1424 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1425 no_response_to_coa_request(request);
1430 * RFC 5080 Section 2.2.1
1432 * RT = 2*RTprev + RAND*RTprev
1433 * = 1.9 * RTprev + rand(0,.2) * RTprev
1434 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1437 delay ^= (delay >> 16);
1439 frac = request->delay / 5;
1440 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1442 delay += (2 * request->delay) - (request->delay / 10);
1445 * Cap delay at MRT, if MRT is non-zero.
1447 if (request->home_server->coa_mrt &&
1448 (delay > (request->home_server->coa_mrt * USEC))) {
1449 int mrt_usec = request->home_server->coa_mrt * USEC;
1452 * delay = MRT + RAND * MRT
1453 * = 0.9 MRT + rand(0,.2) * MRT
1456 delay ^= (delay >> 15);
1458 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1459 delay += mrt_usec - (mrt_usec / 10);
1462 request->delay = delay;
1463 request->when = now;
1464 tv_add(&request->when, request->delay);
1465 mrd = request->proxy_when;
1466 mrd.tv_sec += request->home_server->coa_mrd;
1469 * Cap duration at MRD.
1471 if (timercmp(&mrd, &request->when, <)) {
1472 request->when = mrd;
1473 INSERT_EVENT(no_response_to_coa_request, request);
1476 INSERT_EVENT(retransmit_coa_request, request);
1479 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1481 * Keep a copy of the old Id so that the
1482 * re-transmitted request doesn't re-use the old
1485 RADIUS_PACKET old = *request->proxy;
1488 * Don't free the old Id on error.
1490 if (!insert_into_proxy_hash(request)) {
1491 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1496 * Now that we have a new Id, free the old one.
1498 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1499 fr_packet_list_yank(proxy_list, &old);
1500 fr_packet_list_id_free(proxy_list, &old);
1501 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1503 request->num_proxied_requests = 0;
1504 request->num_proxied_responses = 0;
1507 request->num_proxied_requests++;
1508 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1510 request->proxy_listener->send(request->proxy_listener,
1516 * The original request is either DONE, or in CLEANUP_DELAY.
1518 static int originated_coa_request(REQUEST *request)
1520 int delay, rcode, pre_proxy_type = 0;
1526 rad_assert(request->proxy == NULL);
1527 rad_assert(!request->in_proxy_hash);
1528 rad_assert(request->proxy_reply == NULL);
1531 * Check whether we want to originate one, or cancel one.
1533 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1534 if (!vp && request->coa) {
1535 vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1539 if (vp->vp_integer == 0) {
1540 ev_request_free(&request->coa);
1541 return 1; /* success */
1545 if (!request->coa) request_alloc_coa(request);
1546 if (!request->coa) return 0;
1551 * src_ipaddr will be set up in proxy_encode.
1553 memset(&ipaddr, 0, sizeof(ipaddr));
1554 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1556 ipaddr.af = AF_INET;
1557 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1559 } else if ((vp = pairfind(coa->proxy->vps,
1560 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1561 ipaddr.af = AF_INET6;
1562 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1564 } else if ((vp = pairfind(coa->proxy->vps,
1565 PW_HOME_SERVER_POOL)) != NULL) {
1566 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1568 if (!coa->home_pool) {
1569 RDEBUG2("WARNING: No such home_server_pool %s",
1572 ev_request_free(&request->coa);
1579 } else if (request->client->coa_pool) {
1580 coa->home_pool = request->client->coa_pool;
1582 } else if (request->client->coa_server) {
1583 coa->home_server = request->client->coa_server;
1587 * If all else fails, send it to the client that
1588 * originated this request.
1590 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1594 * Use the pool, if it exists.
1596 if (coa->home_pool) {
1597 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1598 if (!coa->home_server) {
1599 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1603 } else if (!coa->home_server) {
1604 int port = PW_COA_UDP_PORT;
1606 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1607 if (vp) port = vp->vp_integer;
1609 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1610 if (!coa->home_server) {
1611 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1612 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1613 buffer, sizeof(buffer)), port);
1618 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1620 switch (vp->vp_integer) {
1621 case PW_COA_REQUEST:
1622 case PW_DISCONNECT_REQUEST:
1623 coa->proxy->code = vp->vp_integer;
1627 DEBUG("Cannot set CoA Packet-Type to code %d",
1633 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1636 * The rest of the server code assumes that
1637 * request->packet && request->reply exist. Copy them
1638 * from the original request.
1640 rad_assert(coa->packet != NULL);
1641 rad_assert(coa->packet->vps == NULL);
1642 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1643 coa->packet->vps = paircopy(request->packet->vps);
1644 coa->packet->data = NULL;
1645 rad_assert(coa->reply != NULL);
1646 rad_assert(coa->reply->vps == NULL);
1647 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1648 coa->reply->vps = paircopy(request->reply->vps);
1649 coa->reply->data = NULL;
1650 coa->config_items = paircopy(request->config_items);
1653 * Call the pre-proxy routines.
1655 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1657 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1658 pre_proxy_type = vp->vp_integer;
1661 if (coa->home_pool && coa->home_pool->virtual_server) {
1662 const char *old_server = coa->server;
1664 coa->server = coa->home_pool->virtual_server;
1665 RDEBUG2(" server %s {", coa->server);
1666 rcode = module_pre_proxy(pre_proxy_type, coa);
1668 coa->server = old_server;
1670 rcode = module_pre_proxy(pre_proxy_type, coa);
1677 * Only send the CoA packet if the pre-proxy code succeeded.
1679 case RLM_MODULE_NOOP:
1681 case RLM_MODULE_UPDATED:
1686 * Source IP / port is set when the proxy socket
1689 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1690 coa->proxy->dst_port = coa->home_server->port;
1692 if (!insert_into_proxy_hash(coa)) {
1693 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1698 * We CANNOT divorce the CoA request from the parent
1699 * request. This function is running in a child thread,
1700 * and we need access to the main event loop in order to
1701 * to add the timers for the CoA packet. See
1706 * Forget about the original request completely at this
1711 gettimeofday(&request->proxy_when, NULL);
1712 request->received = request->next_when = request->proxy_when;
1713 rad_assert(request->proxy_reply == NULL);
1716 * Implement re-transmit algorithm as per RFC 5080
1719 * We want IRT + RAND*IRT
1720 * or 0.9 IRT + rand(0,.2) IRT
1722 * 2^20 ~ USEC, and we want 2.
1723 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1725 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1726 request->delay = delay * request->home_server->coa_irt;
1727 delay = request->home_server->coa_irt * USEC;
1728 delay -= delay / 10;
1729 delay += request->delay;
1731 request->delay = delay;
1732 tv_add(&request->next_when, delay);
1733 request->next_callback = retransmit_coa_request;
1736 * Note that we set proxied BEFORE sending the packet.
1738 * Once we send it, the request is tainted, as
1739 * another thread may have picked it up. Don't
1742 request->num_proxied_requests = 1;
1743 request->num_proxied_responses = 0;
1744 request->child_pid = NO_SUCH_CHILD_PID;
1746 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1748 request->child_state = REQUEST_PROXIED;
1750 DEBUG_PACKET(request, request->proxy, 1);
1752 request->proxy_listener->send(request->proxy_listener,
1756 #endif /* WITH_COA */
1759 static int process_proxy_reply(REQUEST *request)
1762 int post_proxy_type = 0;
1766 * Delete any reply we had accumulated until now.
1768 pairfree(&request->reply->vps);
1771 * Run the packet through the post-proxy stage,
1772 * BEFORE playing games with the attributes.
1774 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1776 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1777 post_proxy_type = vp->vp_integer;
1780 if (request->home_pool && request->home_pool->virtual_server) {
1781 const char *old_server = request->server;
1783 request->server = request->home_pool->virtual_server;
1784 RDEBUG2(" server %s {", request->server);
1785 rcode = module_post_proxy(post_proxy_type, request);
1787 request->server = old_server;
1789 rcode = module_post_proxy(post_proxy_type, request);
1793 if (request->packet->code == request->proxy->code)
1795 * Don't run the next bit if we originated a CoA
1796 * packet, after receiving an Access-Request or
1797 * Accounting-Request.
1802 * There may NOT be a proxy reply, as we may be
1803 * running Post-Proxy-Type = Fail.
1805 if (request->proxy_reply) {
1807 * Delete the Proxy-State Attributes from
1808 * the reply. These include Proxy-State
1809 * attributes from us and remote server.
1811 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1814 * Add the attributes left in the proxy
1815 * reply to the reply list.
1817 pairadd(&request->reply->vps, request->proxy_reply->vps);
1818 request->proxy_reply->vps = NULL;
1821 * Free proxy request pairs.
1823 pairfree(&request->proxy->vps);
1827 default: /* Don't do anything */
1829 case RLM_MODULE_FAIL:
1830 /* FIXME: debug print stuff */
1831 request->child_state = REQUEST_DONE;
1834 case RLM_MODULE_HANDLED:
1835 /* FIXME: debug print stuff */
1836 request->child_state = REQUEST_DONE;
1844 static int request_pre_handler(REQUEST *request)
1848 rad_assert(request->magic == REQUEST_MAGIC);
1849 rad_assert(request->packet != NULL);
1851 request->child_state = REQUEST_RUNNING;
1854 * Don't decode the packet if it's an internal "fake"
1855 * request. Instead, just return so that the caller can
1858 if (request->packet->dst_port == 0) {
1859 request->username = pairfind(request->packet->vps,
1861 request->password = pairfind(request->packet->vps,
1868 * Put the decoded packet into it's proper place.
1870 if (request->proxy_reply != NULL) {
1872 * FIXME: For now, we can only proxy RADIUS packets.
1874 * In order to proxy other packets, we need to
1875 * somehow cache the "decode" function.
1877 rcode = rad_decode(request->proxy_reply, request->proxy,
1878 request->home_server->secret);
1879 DEBUG_PACKET(request, request->proxy_reply, 0);
1882 if (request->packet->vps == NULL) {
1883 rcode = request->listener->decode(request->listener, request);
1885 if (debug_condition) {
1887 const char *my_debug = debug_condition;
1890 * Ignore parse errors.
1892 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1896 request->options = 2;
1897 request->radlog = radlog_request;
1901 DEBUG_PACKET(request, request->packet, 0);
1907 RDEBUG("%s Dropping packet without response.", fr_strerror());
1908 request->reply->offset = -2; /* bad authenticator */
1909 request->child_state = REQUEST_DONE;
1913 if (!request->username) {
1914 request->username = pairfind(request->packet->vps,
1919 if (request->proxy) {
1920 return process_proxy_reply(request);
1930 * Do state handling when we proxy a request.
1932 static int proxy_request(REQUEST *request)
1934 struct timeval when;
1937 if (request->home_server->server) {
1938 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1942 if (!insert_into_proxy_hash(request)) {
1943 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1947 request->proxy_listener->encode(request->proxy_listener, request);
1949 when = request->received;
1950 when.tv_sec += request->root->max_request_time;
1952 gettimeofday(&request->proxy_when, NULL);
1954 request->next_when = request->proxy_when;
1955 request->next_when.tv_sec += request->home_server->response_window;
1957 rad_assert(request->home_server->response_window > 0);
1959 if (timercmp(&when, &request->next_when, <)) {
1960 request->next_when = when;
1962 request->next_callback = no_response_to_proxied_request;
1964 RDEBUG2("Proxying request %d to home server %s port %d",
1966 inet_ntop(request->proxy->dst_ipaddr.af,
1967 &request->proxy->dst_ipaddr.ipaddr,
1968 buffer, sizeof(buffer)),
1969 request->proxy->dst_port);
1972 * Note that we set proxied BEFORE sending the packet.
1974 * Once we send it, the request is tainted, as
1975 * another thread may have picked it up. Don't
1978 request->num_proxied_requests = 1;
1979 request->num_proxied_responses = 0;
1980 #ifdef HAVE_PTHREAD_H
1981 request->child_pid = NO_SUCH_CHILD_PID;
1983 request->child_state = REQUEST_PROXIED;
1985 DEBUG_PACKET(request, request->proxy, 1);
1987 request->proxy_listener->send(request->proxy_listener,
1994 * "Proxy" the request by sending it to a new virtual server.
1996 static int proxy_to_virtual_server(REQUEST *request)
1999 RAD_REQUEST_FUNP fun;
2001 if (!request->home_server || !request->home_server->server) return 0;
2003 if (request->parent) {
2004 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
2008 fake = request_alloc_fake(request);
2010 RDEBUG2("WARNING: Out of memory");
2014 fake->packet->vps = paircopy(request->proxy->vps);
2015 fake->server = request->home_server->server;
2017 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2018 fun = rad_authenticate;
2020 #ifdef WITH_ACCOUNTING
2021 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2022 fun = rad_accounting;
2026 RDEBUG2("Unknown packet type %d", request->proxy->code);
2027 ev_request_free(&fake);
2031 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2032 radius_handle_request(fake, fun);
2033 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2035 if (fake->reply->code != 0) {
2036 request->proxy_reply = fake->reply;
2040 * There was no response
2042 setup_post_proxy_fail(request);
2045 ev_request_free(&fake);
2047 process_proxy_reply(request);
2050 * Process it through the normal section again, but ONLY
2051 * if we received a proxy reply..
2053 if (request->proxy_reply) {
2054 if (request->server) RDEBUG("server %s {",
2055 request->server != NULL ?
2056 request->server : "");
2059 if (request->server) RDEBUG("} # server %s",
2060 request->server != NULL ?
2061 request->server : "");
2064 return 2; /* success, but NOT '1' !*/
2068 * Return 1 if we did proxy it, or the proxy attempt failed
2069 * completely. Either way, the caller doesn't touch the request
2070 * any more if we return 1.
2072 static int successfully_proxied_request(REQUEST *request)
2075 int pre_proxy_type = 0;
2076 VALUE_PAIR *realmpair;
2077 VALUE_PAIR *strippedname;
2079 char *realmname = NULL;
2081 REALM *realm = NULL;
2085 * If it was already proxied, do nothing.
2087 * FIXME: This should really be a serious error.
2089 if (request->in_proxy_hash ||
2090 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2094 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2095 if (!realmpair || (realmpair->length == 0)) {
2098 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2101 switch (request->packet->code) {
2102 case PW_AUTHENTICATION_REQUEST:
2103 pool_type = HOME_TYPE_AUTH;
2106 #ifdef WITH_ACCOUNTING
2107 case PW_ACCOUNTING_REQUEST:
2108 pool_type = HOME_TYPE_ACCT;
2113 case PW_COA_REQUEST:
2114 case PW_DISCONNECT_REQUEST:
2115 pool_type = HOME_TYPE_COA;
2123 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2125 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2130 realmname = NULL; /* no realms */
2135 realmname = (char *) realmpair->vp_strvalue;
2137 realm = realm_find2(realmname);
2139 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2144 * Figure out which pool to use.
2146 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2147 pool = realm->auth_pool;
2149 #ifdef WITH_ACCOUNTING
2150 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2151 pool = realm->acct_pool;
2155 } else if ((request->packet->code == PW_COA_REQUEST) ||
2156 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2157 pool = realm->acct_pool;
2161 rad_panic("Internal sanity check failed");
2165 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2171 home = home_server_ldb(realmname, pool, request);
2173 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2177 request->home_pool = pool;
2181 * Once we've decided to proxy a request, we cannot send
2182 * a CoA packet. So we free up any CoA packet here.
2184 ev_request_free(&request->coa);
2187 * Remember that we sent the request to a Realm.
2189 if (realmname) pairadd(&request->packet->vps,
2190 pairmake("Realm", realmname, T_OP_EQ));
2193 * Strip the name, if told to.
2195 * Doing it here catches the case of proxied tunneled
2198 if (realm && (realm->striprealm == TRUE) &&
2199 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2201 * If there's a Stripped-User-Name attribute in
2202 * the request, then use THAT as the User-Name
2203 * for the proxied request, instead of the
2206 * This is done by making a copy of the
2207 * Stripped-User-Name attribute, turning it into
2208 * a User-Name attribute, deleting the
2209 * Stripped-User-Name and User-Name attributes
2210 * from the vps list, and making the new
2211 * User-Name the head of the vps list.
2213 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2215 vp = radius_paircreate(request, NULL,
2216 PW_USER_NAME, PW_TYPE_STRING);
2217 rad_assert(vp != NULL); /* handled by above function */
2218 /* Insert at the START of the list */
2219 vp->next = request->proxy->vps;
2220 request->proxy->vps = vp;
2222 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2223 sizeof(vp->vp_strvalue));
2224 vp->length = strippedname->length;
2227 * Do NOT delete Stripped-User-Name.
2232 * If there is no PW_CHAP_CHALLENGE attribute but
2233 * there is a PW_CHAP_PASSWORD we need to add it
2234 * since we can't use the request authenticator
2235 * anymore - we changed it.
2237 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2238 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2239 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2240 vp = radius_paircreate(request, &request->proxy->vps,
2241 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2242 vp->length = AUTH_VECTOR_LEN;
2243 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2247 * The RFC's say we have to do this, but FreeRADIUS
2250 vp = radius_paircreate(request, &request->proxy->vps,
2251 PW_PROXY_STATE, PW_TYPE_OCTETS);
2252 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2253 request->packet->id);
2254 vp->length = strlen(vp->vp_strvalue);
2257 * Should be done BEFORE inserting into proxy hash, as
2258 * pre-proxy may use this information, or change it.
2260 request->proxy->code = request->packet->code;
2263 * Call the pre-proxy routines.
2265 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2267 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2268 pre_proxy_type = vp->vp_integer;
2271 rad_assert(request->home_pool != NULL);
2273 if (request->home_pool->virtual_server) {
2274 const char *old_server = request->server;
2276 request->server = request->home_pool->virtual_server;
2277 RDEBUG2(" server %s {", request->server);
2278 rcode = module_pre_proxy(pre_proxy_type, request);
2280 request->server = old_server;
2282 rcode = module_pre_proxy(pre_proxy_type, request);
2285 case RLM_MODULE_FAIL:
2286 case RLM_MODULE_INVALID:
2287 case RLM_MODULE_NOTFOUND:
2288 case RLM_MODULE_USERLOCK:
2290 /* FIXME: debug print failed stuff */
2293 case RLM_MODULE_REJECT:
2294 case RLM_MODULE_HANDLED:
2298 * Only proxy the packet if the pre-proxy code succeeded.
2300 case RLM_MODULE_NOOP:
2302 case RLM_MODULE_UPDATED:
2307 * If it's a fake request, don't send the proxy
2308 * packet. The outer tunnel session will take
2309 * care of doing that.
2311 if (request->packet->dst_port == 0) {
2312 request->home_server = NULL;
2316 if (request->home_server->server) {
2317 return proxy_to_virtual_server(request);
2320 if (!proxy_request(request)) {
2321 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2329 static void request_post_handler(REQUEST *request)
2331 int child_state = -1;
2332 struct timeval when;
2335 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2337 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2338 RDEBUG2("Request %d was cancelled.", request->number);
2339 #ifdef HAVE_PTHREAD_H
2340 request->child_pid = NO_SUCH_CHILD_PID;
2342 child_state = REQUEST_DONE;
2346 if (request->child_state != REQUEST_RUNNING) {
2347 rad_panic("Internal sanity check failed");
2352 * If it's not in the request hash, it's a CoA request.
2355 if (!request->in_request_hash &&
2357 ((request->proxy->code == PW_COA_REQUEST) ||
2358 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2359 request->next_callback = NULL;
2360 child_state = REQUEST_DONE;
2366 * Catch Auth-Type := Reject BEFORE proxying the packet.
2368 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2369 (request->reply->code == 0) &&
2370 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2371 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2372 request->reply->code = PW_AUTHENTICATION_REJECT;
2376 if (request->root->proxy_requests &&
2377 !request->in_proxy_hash &&
2378 (request->reply->code == 0) &&
2379 (request->packet->dst_port != 0) &&
2380 (request->packet->code != PW_STATUS_SERVER)) {
2381 int rcode = successfully_proxied_request(request);
2383 if (rcode == 1) return; /* request is invalid */
2386 * Failed proxying it (dead home servers, etc.)
2387 * Run it through Post-Proxy-Type = Fail, and
2388 * respond to the request.
2390 * Note that we're in a child thread here, so we
2391 * do NOT re-schedule the request. Instead, we
2392 * do what we would have done, which is run the
2393 * pre-handler, a NULL request handler, and then
2396 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2397 request_pre_handler(request);
2401 * Else we weren't supposed to proxy it,
2402 * OR we proxied it internally to a virutal server.
2408 * Fake requests don't get encoded or signed. The caller
2409 * also requires the reply VP's, so we don't free them
2412 if (request->packet->dst_port == 0) {
2413 /* FIXME: RDEBUG going to the next request */
2414 #ifdef HAVE_PTHREAD_H
2415 request->child_pid = NO_SUCH_CHILD_PID;
2417 request->child_state = REQUEST_DONE;
2423 * Copy Proxy-State from the request to the reply.
2425 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2426 if (vp) pairadd(&request->reply->vps, vp);
2430 * Access-Requests get delayed or cached.
2432 switch (request->packet->code) {
2433 case PW_AUTHENTICATION_REQUEST:
2434 gettimeofday(&request->next_when, NULL);
2436 if (request->reply->code == 0) {
2438 * Check if the lack of response is intentional.
2440 vp = pairfind(request->config_items,
2441 PW_RESPONSE_PACKET_TYPE);
2443 RDEBUG2("There was no response configured: rejecting request %d",
2445 request->reply->code = PW_AUTHENTICATION_REJECT;
2447 } else if (vp->vp_integer == 256) {
2448 RDEBUG2("Not responding to request %d",
2452 * Force cleanup after a long
2453 * time, so that we don't
2454 * re-process the packet.
2456 request->next_when.tv_sec += request->root->max_request_time;
2457 request->next_callback = cleanup_delay;
2458 child_state = REQUEST_CLEANUP_DELAY;
2461 request->reply->code = vp->vp_integer;
2467 * Run rejected packets through
2469 * Post-Auth-Type = Reject
2471 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2472 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2473 vp = radius_pairmake(request, &request->config_items,
2474 "Post-Auth-Type", "Reject",
2476 if (vp) rad_postauth(request);
2479 * If configured, delay Access-Reject packets.
2481 * If request->root->reject_delay = 0, we discover
2482 * that we have to send the packet now.
2484 when = request->received;
2485 when.tv_sec += request->root->reject_delay;
2487 if (timercmp(&when, &request->next_when, >)) {
2488 RDEBUG2("Delaying reject of request %d for %d seconds",
2490 request->root->reject_delay);
2491 request->next_when = when;
2492 request->next_callback = reject_delay;
2493 #ifdef HAVE_PTHREAD_H
2494 request->child_pid = NO_SUCH_CHILD_PID;
2496 request->child_state = REQUEST_REJECT_DELAY;
2502 case PW_COA_REQUEST:
2503 case PW_DISCONNECT_REQUEST:
2505 request->next_when.tv_sec += request->root->cleanup_delay;
2506 request->next_callback = cleanup_delay;
2507 child_state = REQUEST_CLEANUP_DELAY;
2510 case PW_ACCOUNTING_REQUEST:
2511 request->next_callback = NULL; /* just to be safe */
2512 child_state = REQUEST_DONE;
2516 * FIXME: Status-Server should probably not be
2519 case PW_STATUS_SERVER:
2520 request->next_callback = NULL;
2521 child_state = REQUEST_DONE;
2528 request->next_callback = NULL;
2529 child_state = REQUEST_DONE;
2534 * Suppress "no reply" packets here, unless we're reading
2535 * from the "detail" file. In that case, we've got to
2536 * tell the detail file handler that the request is dead,
2537 * and it should re-send it.
2538 * If configured, encode, sign, and send.
2540 if ((request->reply->code != 0) ||
2541 (request->listener->type == RAD_LISTEN_DETAIL)) {
2542 DEBUG_PACKET(request, request->reply, 1);
2543 request->listener->send(request->listener, request);
2548 * Now that we've completely processed the request,
2549 * see if we need to originate a CoA request.
2552 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2553 if (!originated_coa_request(request)) {
2554 RDEBUG2("Do CoA Fail handler here");
2556 /* request->coa is stil set, so we can update events */
2562 * Clean up. These are no longer needed.
2564 pairfree(&request->config_items);
2566 pairfree(&request->packet->vps);
2567 request->username = NULL;
2568 request->password = NULL;
2570 pairfree(&request->reply->vps);
2573 if (request->proxy) {
2574 pairfree(&request->proxy->vps);
2576 if (request->proxy_reply) {
2577 pairfree(&request->proxy_reply->vps);
2582 * We're not tracking responses from the home
2583 * server, we can therefore free this memory in
2586 if (!request->in_proxy_hash) {
2587 rad_free(&request->proxy);
2588 rad_free(&request->proxy_reply);
2589 request->home_server = NULL;
2595 RDEBUG2("Finished request %d.", request->number);
2596 rad_assert(child_state >= 0);
2597 request->child_state = child_state;
2600 * Single threaded mode: update timers now.
2602 if (!have_children) wait_a_bit(request);
2606 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2612 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2613 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2615 switch (request->child_state) {
2616 case REQUEST_QUEUED:
2617 case REQUEST_RUNNING:
2621 radlog(L_ERR, "Discarding duplicate request from "
2622 "client %s port %d - ID: %d due to unfinished request %d",
2624 request->packet->src_port,request->packet->id,
2629 case REQUEST_PROXIED:
2631 * We're not supposed to have duplicate
2632 * accounting packets. The other states handle
2633 * duplicates fine (discard, or send duplicate
2634 * reply). But we do NOT want to retransmit an
2635 * accounting request here, because that would
2636 * involve updating the Acct-Delay-Time, and
2637 * therefore changing the packet Id, etc.
2639 * Instead, we just discard the packet. We may
2640 * eventually respond, or the client will send a
2641 * new accounting packet.
2643 * The same comments go for Status-Server, and
2644 * other packet types.
2646 * FIXME: coa: when we proxy CoA && Disconnect
2647 * packets, this logic has to be fixed.
2649 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2653 check_for_zombie_home_server(request);
2656 * If we've just discovered that the home server
2657 * is dead, OR the socket has been closed, look for
2658 * another connection to a home server.
2660 if (((request->packet->dst_port != 0) &&
2661 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2662 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2665 remove_from_proxy_hash(request);
2667 home = home_server_ldb(NULL, request->home_pool, request);
2669 RDEBUG2("Failed to find live home server for request %d", request->number);
2672 * Do post-request processing,
2673 * and any insertion of necessary
2676 post_proxy_fail_handler(request);
2680 request->proxy->code = request->packet->code;
2683 * Free the old packet, to force re-encoding
2685 free(request->proxy->data);
2686 request->proxy->data = NULL;
2687 request->proxy->data_len = 0;
2690 * This request failed over to a virtual
2691 * server. Push it back onto the queue
2694 if (request->home_server->server) {
2695 proxy_fallback_handler(request);
2700 * Try to proxy the request.
2702 if (!proxy_request(request)) {
2703 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2704 goto no_home_servers;
2708 * This code executes in the main server
2709 * thread, so there's no need for locking.
2711 rad_assert(request->next_callback != NULL);
2712 INSERT_EVENT(request->next_callback, request);
2713 request->next_callback = NULL;
2715 } /* else the home server is still alive */
2718 if (request->home_server->proto == IPPROTO_TCP) {
2719 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2720 inet_ntop(request->proxy->dst_ipaddr.af,
2721 &request->proxy->dst_ipaddr.ipaddr,
2722 buffer, sizeof(buffer)),
2723 request->proxy->dst_port,
2724 request->proxy->id);
2729 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2730 inet_ntop(request->proxy->dst_ipaddr.af,
2731 &request->proxy->dst_ipaddr.ipaddr,
2732 buffer, sizeof(buffer)),
2733 request->proxy->dst_port,
2734 request->proxy->id);
2735 request->num_proxied_requests++;
2737 DEBUG_PACKET(request, request->proxy, 1);
2738 request->proxy_listener->send(request->proxy_listener,
2743 case REQUEST_REJECT_DELAY:
2744 RDEBUG2("Waiting to send Access-Reject "
2745 "to client %s port %d - ID: %d",
2747 request->packet->src_port, request->packet->id);
2750 case REQUEST_CLEANUP_DELAY:
2752 if (request->reply->code == 0) {
2753 RDEBUG2("Ignoring retransmit from client %s port %d "
2754 "- ID: %d, no reply was configured",
2756 request->packet->src_port, request->packet->id);
2761 * FIXME: This sends duplicate replies to
2762 * accounting requests, even if Acct-Delay-Time
2763 * or Event-Timestamp is in the packet. In those
2764 * cases, the Id should be changed, and the packet
2767 RDEBUG2("Sending duplicate reply "
2768 "to client %s port %d - ID: %d",
2770 request->packet->src_port, request->packet->id);
2771 DEBUG_PACKET(request, request->reply, 1);
2772 request->listener->send(request->listener, request);
2778 static void received_conflicting_request(REQUEST *request,
2779 const RADCLIENT *client)
2781 radlog(L_ERR, "Received conflicting packet from "
2782 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2784 request->packet->src_port, request->packet->id,
2788 * Nuke it from the request hash, so we can receive new
2791 remove_from_request_hash(request);
2793 switch (request->child_state) {
2795 * Tell it to stop, and wait for it to do so.
2798 request->master_state = REQUEST_STOP_PROCESSING;
2799 request->delay += request->delay >> 1;
2801 tv_add(&request->when, request->delay);
2803 INSERT_EVENT(wait_for_child_to_die, request);
2807 * Catch race conditions. It may have switched
2808 * from running to done while this code is being
2811 case REQUEST_REJECT_DELAY:
2812 case REQUEST_CLEANUP_DELAY:
2819 static int can_handle_new_request(RADIUS_PACKET *packet,
2821 struct main_config_t *root)
2824 * Count the total number of requests, to see if
2825 * there are too many. If so, return with an
2828 if (root->max_requests) {
2829 int request_count = fr_packet_list_num_elements(pl);
2832 * This is a new request. Let's see if
2833 * it makes us go over our configured
2836 if (request_count > root->max_requests) {
2837 radlog(L_ERR, "Dropping request (%d is too many): "
2838 "from client %s port %d - ID: %d", request_count,
2840 packet->src_port, packet->id);
2841 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2842 "\tThe value for 'max_requests' is probably set too low.\n");
2844 } /* else there were a small number of requests */
2845 } /* else there was no configured limit for requests */
2848 * FIXME: Add per-client checks. If one client is sending
2849 * too many packets, start discarding them.
2851 * We increment the counters here, and decrement them
2852 * when the response is sent... somewhere in this file.
2856 * FUTURE: Add checks for system load. If the system is
2857 * busy, start dropping requests...
2859 * We can probably keep some statistics ourselves... if
2860 * there are more requests coming in than we can handle,
2861 * start dropping some.
2868 int received_request(rad_listen_t *listener,
2869 RADIUS_PACKET *packet, REQUEST **prequest,
2872 RADIUS_PACKET **packet_p;
2873 REQUEST *request = NULL;
2874 struct main_config_t *root = &mainconfig;
2876 packet_p = fr_packet_list_find(pl, packet);
2878 request = fr_packet2myptr(REQUEST, packet, packet_p);
2879 rad_assert(request->in_request_hash);
2881 if ((request->packet->data_len == packet->data_len) &&
2882 (memcmp(request->packet->vector, packet->vector,
2883 sizeof(packet->vector)) == 0)) {
2884 received_retransmit(request, client);
2889 * The new request is different from the old one,
2890 * but maybe the old is finished. If so, delete
2893 switch (request->child_state) {
2894 struct timeval when;
2898 * Special hacks for race conditions.
2899 * The reply is encoded, and therefore
2900 * likely sent. We received a *new*
2901 * packet from the client, likely before
2902 * the next line or two of code which
2903 * updated the child state. In this
2904 * case, just accept the new request.
2906 if ((request->reply->code != 0) &&
2907 request->reply->data) {
2908 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2910 packet->src_port, packet->id,
2912 remove_from_request_hash(request);
2917 gettimeofday(&when, NULL);
2921 * If the cached request was received
2922 * within the last second, then we
2923 * discard the NEW request instead of the
2924 * old one. This will happen ONLY when
2925 * the client is severely broken, and is
2926 * sending conflicting packets very
2929 if (timercmp(&when, &request->received, <)) {
2930 radlog(L_ERR, "Discarding conflicting packet from "
2931 "client %s port %d - ID: %d due to recent request %d.",
2933 packet->src_port, packet->id,
2938 received_conflicting_request(request, client);
2942 case REQUEST_REJECT_DELAY:
2943 case REQUEST_CLEANUP_DELAY:
2944 request->child_state = REQUEST_DONE;
2946 cleanup_delay(request);
2953 * We may want to quench the new request.
2955 if ((listener->type != RAD_LISTEN_DETAIL) &&
2956 !can_handle_new_request(packet, client, root)) {
2961 * Create and initialize the new request.
2963 request = request_alloc(); /* never fails */
2965 if ((request->reply = rad_alloc(0)) == NULL) {
2966 radlog(L_ERR, "No memory");
2970 request->listener = listener;
2971 request->client = client;
2972 request->packet = packet;
2973 request->packet->timestamp = request->timestamp;
2974 request->number = request_num_counter++;
2975 request->priority = listener->type;
2976 #ifdef HAVE_PTHREAD_H
2977 request->child_pid = NO_SUCH_CHILD_PID;
2981 * Status-Server packets go to the head of the queue.
2983 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2986 * Set virtual server identity
2988 if (client->server) {
2989 request->server = client->server;
2990 } else if (listener->server) {
2991 request->server = listener->server;
2993 request->server = NULL;
2997 * Remember the request in the list.
2999 if (!fr_packet_list_insert(pl, &request->packet)) {
3000 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
3001 ev_request_free(&request);
3005 request->in_request_hash = TRUE;
3006 request->root = root;
3009 request->listener->count++;
3013 * The request passes many of our sanity checks.
3014 * From here on in, if anything goes wrong, we
3015 * send a reject message, instead of dropping the
3020 * Build the reply template from the request.
3023 request->reply->sockfd = request->packet->sockfd;
3024 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3025 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3026 request->reply->dst_port = request->packet->src_port;
3027 request->reply->src_port = request->packet->dst_port;
3028 request->reply->id = request->packet->id;
3029 request->reply->code = 0; /* UNKNOWN code */
3030 memcpy(request->reply->vector, request->packet->vector,
3031 sizeof(request->reply->vector));
3032 request->reply->vps = NULL;
3033 request->reply->data = NULL;
3034 request->reply->data_len = 0;
3036 request->master_state = REQUEST_ACTIVE;
3037 request->child_state = REQUEST_QUEUED;
3038 request->next_callback = NULL;
3040 gettimeofday(&request->received, NULL);
3041 request->timestamp = request->received.tv_sec;
3042 request->when = request->received;
3044 request->delay = USEC;
3046 tv_add(&request->when, request->delay);
3048 INSERT_EVENT(wait_a_bit, request);
3050 *prequest = request;
3056 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3062 * Also removes from the proxy hash if responses == requests
3064 request = lookup_in_proxy_hash(packet);
3067 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3068 inet_ntop(packet->src_ipaddr.af,
3069 &packet->src_ipaddr.ipaddr,
3070 buffer, sizeof(buffer)),
3071 packet->src_port, packet->id);
3076 * We haven't replied to the NAS, but we have seen an
3077 * earlier reply from the home server. Ignore this packet,
3078 * as we're likely still processing the previous reply.
3080 if (request->proxy_reply) {
3081 if (memcmp(request->proxy_reply->vector,
3083 sizeof(request->proxy_reply->vector)) == 0) {
3084 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
3085 inet_ntop(packet->src_ipaddr.af,
3086 &packet->src_ipaddr.ipaddr,
3087 buffer, sizeof(buffer)),
3088 packet->src_port, packet->id,
3092 * ? The home server gave us a new proxy
3093 * reply which doesn't match the old
3096 RDEBUG2("Ignoring conflicting proxy reply");
3099 /* assert that there's an event queued for request? */
3104 * Verify the packet before doing ANYTHING with it. This
3105 * means we're doing more MD5 checks in the server core.
3106 * However, we can fix that by moving to multiple threads
3107 * listening on sockets.
3109 * We do this AFTER looking the request up in the hash,
3110 * and AFTER vhecking if we saw a previous request. This
3111 * helps minimize the DoS effect of people attacking us
3112 * with spoofed packets.
3114 if (rad_verify(packet, request->proxy,
3115 request->home_server->secret) != 0) {
3116 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3120 gettimeofday(&now, NULL);
3123 * Maybe move this earlier in the decision process?
3124 * Having it here means that late or duplicate proxy
3125 * replies no longer get the home server marked as
3126 * "alive". This might be good for stability, though.
3128 * FIXME: Do we really want to do this whenever we
3129 * receive a packet? Setting this here means that we
3130 * mark it alive on *any* packet, even if it's lost all
3131 * of the *other* packets in the last 10s.
3133 if (request->proxy->code != PW_STATUS_SERVER) {
3134 request->home_server->state = HOME_STATE_ALIVE;
3139 * When originating CoA, the "proxy" reply is the reply
3140 * to the CoA request that we originated. At this point,
3141 * the original request is finished, and it has a reply.
3143 * However, if we haven't separated the two requests, do
3144 * so now. This is done so that cleaning up the original
3145 * request won't cause the CoA request to be free'd. See
3146 * util.c, request_free()
3148 if (request->parent && (request->parent->coa == request)) {
3149 request->parent->coa = NULL;
3150 request->parent = NULL;
3153 * The proxied packet was different from the
3154 * original packet, AND the proxied packet was
3157 } else if ((request->packet->code != request->proxy->code) &&
3158 ((request->proxy->code == PW_COA_REQUEST) ||
3159 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
3161 * It's already divorced: do nothing.
3166 * Skip the next set of checks, as the original
3167 * reply is cached. We want to be able to still
3168 * process the CoA reply, AND to reference the
3169 * original request/reply.
3171 * This is getting to be really quite a bit of a
3177 * If there's a reply to the NAS, ignore everything
3178 * related to proxy responses
3180 if (request->reply && request->reply->code != 0) {
3181 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3187 * The average includes our time to receive packets and
3188 * look them up in the hashes, which should be the same
3191 * We update the response time only for the FIRST packet
3194 if (request->home_server->ema.window > 0) {
3195 radius_stats_ema(&request->home_server->ema,
3196 &now, &request->proxy_when);
3200 switch (request->child_state) {
3201 case REQUEST_QUEUED:
3202 case REQUEST_RUNNING:
3203 radlog(L_ERR, "Internal sanity check failed for child state");
3206 case REQUEST_REJECT_DELAY:
3207 case REQUEST_CLEANUP_DELAY:
3209 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'",
3210 inet_ntop(packet->src_ipaddr.af,
3211 &packet->src_ipaddr.ipaddr,
3212 buffer, sizeof(buffer)),
3213 packet->src_port, packet->id,
3215 /* assert that there's an event queued for request? */
3218 case REQUEST_PROXIED:
3222 request->proxy_reply = packet;
3226 * Perform RTT calculations, as per RFC 2988 (for TCP).
3227 * Note that we only do so on the first response.
3229 if ((request->num_proxied_responses == 1)
3231 home_server *home = request->home_server;
3233 rtt = now.tv_sec - request->proxy_when.tv_sec;
3236 rtt -= request->proxy_when.tv_usec;
3238 if (!home->has_rtt) {
3239 home->has_rtt = TRUE;
3242 home->rttvar = rtt / 2;
3245 home->rttvar -= home->rttvar >> 2;
3246 home->rttvar += (home->srtt - rtt);
3247 home->srtt -= home->srtt >> 3;
3248 home->srtt += rtt >> 3;
3251 home->rto = home->srtt;
3252 if (home->rttvar > (USEC / 4)) {
3253 home->rto += home->rttvar * 4;
3261 * There's no incoming request, so it's a proxied packet
3264 if (!request->packet) {
3265 received_response_to_ping(request);
3266 request->proxy_reply = NULL; /* caller will free it */
3267 ev_request_free(&request);
3271 request->child_state = REQUEST_QUEUED;
3272 request->when = now;
3273 request->delay = USEC;
3274 request->priority = RAD_LISTEN_PROXY;
3275 tv_add(&request->when, request->delay);
3278 * Wait a bit will take care of max_request_time
3280 INSERT_EVENT(wait_a_bit, request);
3285 #endif /* WITH_PROXY */
3288 static void tcp_socket_lifetime(void *ctx)
3290 rad_listen_t *listener = ctx;
3293 listener->print(listener, buffer, sizeof(buffer));
3295 DEBUG("Reached maximum lifetime on socket %s", buffer);
3297 listener->status = RAD_LISTEN_STATUS_CLOSED;
3298 event_new_fd(listener);
3301 static void tcp_socket_idle_timeout(void *ctx)
3303 rad_listen_t *listener = ctx;
3304 listen_socket_t *sock = listener->data;
3307 fr_event_now(el, &now); /* should always succeed... */
3309 rad_assert(sock->home != NULL);
3312 * We implement idle timeout by polling, because it's
3313 * cheaper than resetting the idle timeout every time
3314 * we send / receive a packet.
3316 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3317 struct timeval when;
3318 void *fun = tcp_socket_idle_timeout;
3320 when.tv_sec = sock->last_packet;
3321 when.tv_sec += sock->home->idle_timeout;
3324 if (sock->home->lifetime &&
3325 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3326 when.tv_sec = sock->opened + sock->home->lifetime;
3327 fun = tcp_socket_lifetime;
3330 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3331 rad_panic("Failed to insert event");
3337 listener->print(listener, buffer, sizeof(buffer));
3339 DEBUG("Reached idle timeout on socket %s", buffer);
3341 listener->status = RAD_LISTEN_STATUS_CLOSED;
3342 event_new_fd(listener);
3346 int event_new_fd(rad_listen_t *this)
3350 if (this->status == RAD_LISTEN_STATUS_KNOWN) return 1;
3352 this->print(this, buffer, sizeof(buffer));
3354 if (this->status == RAD_LISTEN_STATUS_INIT) {
3356 DEBUG("Listening on %s", buffer);
3358 radlog(L_INFO, " ... adding new socket %s", buffer);
3363 * Add it to the list of sockets we can use.
3364 * Server sockets (i.e. auth/acct) are never
3365 * added to the packet list.
3367 if (this->type == RAD_LISTEN_PROXY) {
3368 listen_socket_t *sock = this->data;
3370 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3371 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3373 &sock->other_ipaddr, sock->other_port,
3376 proxy_no_new_sockets = TRUE;
3377 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3380 * This is bad. However, the
3381 * packet list now supports 256
3382 * open sockets, which should
3383 * minimize this problem.
3385 radlog(L_ERR, "Failed adding proxy socket: %s",
3391 sock->home->num_connections++;
3394 * If necessary, add it to the list of
3395 * new proxy listeners.
3397 if (sock->home->lifetime || sock->home->idle_timeout) {
3398 this->next = proxy_listener_list;
3399 proxy_listener_list = this;
3402 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3405 * Tell the main thread that we've added
3406 * a proxy listener, but only if we need
3407 * to update the event list. Do this
3408 * with the mutex unlocked, to reduce
3412 if (sock->home->lifetime || sock->home->idle_timeout) {
3413 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3421 * Detail files are always known, and aren't
3422 * put into the socket event loop.
3424 if (this->type == RAD_LISTEN_DETAIL) {
3425 this->status = RAD_LISTEN_STATUS_KNOWN;
3428 * Set up the first poll interval.
3430 event_poll_detail(this);
3435 FD_MUTEX_LOCK(&fd_mutex);
3436 if (!fr_event_fd_insert(el, 0, this->fd,
3437 event_socket_handler, this)) {
3438 radlog(L_ERR, "Failed adding event handler for proxy socket!");
3441 FD_MUTEX_UNLOCK(&fd_mutex);
3443 this->status = RAD_LISTEN_STATUS_KNOWN;
3448 * Something went wrong with the socket: make it harmless.
3450 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3454 * Remove it from the list of live FD's.
3456 FD_MUTEX_LOCK(&fd_mutex);
3457 fr_event_fd_delete(el, 0, this->fd);
3458 FD_MUTEX_UNLOCK(&fd_mutex);
3462 * We track requests using this socket only for
3463 * TCP. For UDP, we don't currently close
3467 if (this->type != RAD_LISTEN_PROXY)
3470 if (this->count != 0) {
3471 fr_packet_list_walk(pl, this,
3472 remove_all_requests);
3475 if (this->count == 0) {
3476 this->status = RAD_LISTEN_STATUS_FINISH;
3482 int count = this->count;
3487 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3488 if (!fr_packet_list_socket_freeze(proxy_list,
3490 radlog(L_ERR, "Fatal error freezing socket: %s",
3496 * Doing this with the proxy mutex held
3497 * is a Bad Thing. We should move to
3498 * finer-grained mutexes.
3500 count = this->count;
3502 fr_packet_list_walk(proxy_list, this,
3503 remove_all_proxied_requests);
3505 count = this->count; /* protected by mutex */
3506 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3509 this->status = RAD_LISTEN_STATUS_FINISH;
3513 #endif /* WITH_PROXY */
3514 #endif /* WITH_TCP */
3517 * Re-open the socket, pointing it to /dev/null.
3518 * This means that all writes proceed without
3519 * blocking, and all reads return "no data".
3521 * This leaves the socket active, so any child
3522 * threads won't go insane. But it means that
3523 * they cannot send or receive any packets.
3525 * This is EXTRA work in the normal case, when
3526 * sockets are closed without error. But it lets
3527 * us have one simple processing method for all
3530 devnull = open("/dev/null", O_RDWR);
3532 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3536 if (dup2(devnull, this->fd) < 0) {
3537 radlog(L_ERR, "FATAL failure closing socket: %s",
3543 this->status = RAD_LISTEN_STATUS_CLOSED;
3546 * Fall through to the next section.
3552 * Called ONLY from the main thread. On the following
3558 * (and falling through from "forcibly close FD" above)
3559 * client closed connection on us
3560 * client sent us a bad packet.
3562 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3563 int count = this->count;
3564 rad_assert(this->type != RAD_LISTEN_DETAIL);
3568 * Remove it from the list of active sockets, so
3569 * that it isn't used when proxying new packets.
3571 if (this->type == RAD_LISTEN_PROXY) {
3572 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3573 if (!fr_packet_list_socket_freeze(proxy_list,
3575 radlog(L_ERR, "Fatal error freezing socket: %s",
3579 count = this->count; /* protected by mutex */
3580 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3585 * Requests are still using the socket. Wait for
3589 struct timeval when;
3590 listen_socket_t *sock = this->data;
3593 * Try again to clean up the socket in 30
3596 gettimeofday(&when, NULL);
3599 if (!fr_event_insert(el,
3600 (fr_event_callback_t) event_new_fd,
3601 this, &when, &sock->ev)) {
3602 rad_panic("Failed to insert event");
3609 * No one is using this socket: we can delete it
3612 this->status = RAD_LISTEN_STATUS_FINISH;
3616 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3617 listen_socket_t *sock = this->data;
3619 rad_assert(this->count == 0);
3620 radlog(L_INFO, " ... closing socket %s", buffer);
3623 * Remove it from the list of live FD's. Note
3624 * that it MAY also have been removed above. We
3625 * do it again here, to catch the case of sockets
3626 * closing on idle timeout, or max
3627 * lifetime... AFTER all requests have finished
3630 FD_MUTEX_LOCK(&fd_mutex);
3631 fr_event_fd_delete(el, 0, this->fd);
3632 FD_MUTEX_UNLOCK(&fd_mutex);
3636 * Remove it from the list of sockets to be used
3639 if (this->type == RAD_LISTEN_PROXY) {
3640 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3641 if (!fr_packet_list_socket_remove(proxy_list,
3643 radlog(L_ERR, "Fatal error removing socket: %s",
3647 if (sock->home) sock->home->num_connections--;
3648 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3653 * Remove any pending cleanups.
3655 if (sock->ev) fr_event_delete(el, &sock->ev);
3658 * And finally, close the socket.
3662 #endif /* WITH_TCP */
3667 static void handle_signal_self(int flag)
3669 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3670 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3671 radlog(L_INFO, "Received TERM signal");
3672 fr_event_loop_exit(el, 1);
3674 fr_event_loop_exit(el, 2);
3678 } /* else exit/term flags weren't set */
3681 * Tell the even loop to stop processing.
3683 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3685 static time_t last_hup = 0;
3688 if ((int) (when - last_hup) < 5) {
3689 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3693 radlog(L_INFO, "Received HUP signal.");
3697 fr_event_loop_exit(el, 0x80);
3701 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3705 * FIXME: O(N) loops suck.
3707 for (this = mainconfig.listen;
3709 this = this->next) {
3710 if (this->type != RAD_LISTEN_DETAIL) continue;
3713 * This one didn't send the signal, skip
3716 if (!this->decode(this, NULL)) continue;
3719 * Go service the interrupt.
3721 event_poll_detail(this);
3729 * Add event handlers for idle timeouts && maximum lifetime.
3731 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3732 struct timeval when;
3735 fr_event_now(el, &now);
3737 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3739 while (proxy_listener_list) {
3740 rad_listen_t *this = proxy_listener_list;
3741 listen_socket_t *sock = this->data;
3743 proxy_listener_list = this->next;
3746 if (!sock->home) continue; /* skip UDP sockets */
3750 if (!sock->home->idle_timeout) {
3751 rad_assert(sock->home->lifetime != 0);
3753 when.tv_sec += sock->home->lifetime;
3754 fun = tcp_socket_lifetime;
3756 rad_assert(sock->home->idle_timeout != 0);
3758 when.tv_sec += sock->home->idle_timeout;
3759 fun = tcp_socket_idle_timeout;
3762 if (!fr_event_insert(el, fun, this, &when,
3764 rad_panic("Failed to insert event");
3768 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3770 #endif /* WITH_PROXY */
3771 #endif /* WITH_TCP */
3774 #ifndef WITH_SELF_PIPE
3775 void radius_signal_self(int flag)
3777 handle_signal_self(flag);
3781 * Inform ourselves that we received a signal.
3783 void radius_signal_self(int flag)
3789 * The read MUST be non-blocking for this to work.
3791 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3795 for (i = 0; i < rcode; i++) {
3796 buffer[0] |= buffer[i];
3804 write(self_pipe[1], buffer, 1);
3808 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3809 UNUSED int fd, UNUSED void *ctx)
3814 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3815 if (rcode <= 0) return;
3818 * Merge pending signals.
3820 for (i = 0; i < rcode; i++) {
3821 buffer[0] |= buffer[i];
3824 handle_signal_self(buffer[0]);
3829 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3832 rad_listen_t *listener = ctx;
3833 RAD_REQUEST_FUNP fun;
3836 rad_assert(xel == el);
3840 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3842 if (!listener->recv(listener, &fun, &request)) return;
3844 if (!thread_pool_addrequest(request, fun)) {
3845 request->child_state = REQUEST_DONE;
3851 * This function is called periodically to see if this detail
3852 * file is available for reading.
3854 static void event_poll_detail(void *ctx)
3857 RAD_REQUEST_FUNP fun;
3859 rad_listen_t *this = ctx;
3860 struct timeval when;
3861 listen_detail_t *detail = this->data;
3863 rad_assert(this->type == RAD_LISTEN_DETAIL);
3866 * Try to read something.
3868 * FIXME: This does poll AND receive.
3870 rcode = this->recv(this, &fun, &request);
3872 rad_assert(fun != NULL);
3873 rad_assert(request != NULL);
3875 if (!thread_pool_addrequest(request, fun)) {
3876 request->child_state = REQUEST_DONE;
3880 fr_event_now(el, &now);
3884 * Backdoor API to get the delay until the next poll
3887 delay = this->encode(this, NULL);
3888 tv_add(&when, delay);
3890 if (!fr_event_insert(el, event_poll_detail, this,
3891 &when, &detail->ev)) {
3892 radlog(L_ERR, "Failed creating handler");
3898 static void event_status(struct timeval *wake)
3900 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3904 if (debug_flag == 0) {
3906 radlog(L_INFO, "Ready to process requests.");
3907 just_started = FALSE;
3913 radlog(L_INFO, "Ready to process requests.");
3915 } else if ((wake->tv_sec != 0) ||
3916 (wake->tv_usec >= 100000)) {
3917 DEBUG("Waking up in %d.%01u seconds.",
3918 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3923 * FIXME: Put this somewhere else, where it isn't called
3924 * all of the time...
3927 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3929 * If there are no child threads, then there may
3930 * be child processes. In that case, wait for
3931 * their exit status, and throw that exit status
3932 * away. This helps get rid of zxombie children.
3934 while (waitpid(-1, &argval, WNOHANG) > 0) {
3942 * Externally-visibly functions.
3944 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3946 rad_listen_t *head = NULL;
3950 time(&fr_start_time);
3952 el = fr_event_list_create(event_status);
3955 pl = fr_packet_list_create(0);
3956 if (!pl) return 0; /* leak el */
3958 request_num_counter = 0;
3961 if (mainconfig.proxy_requests) {
3963 * Create the tree for managing proxied requests and
3966 proxy_list = fr_packet_list_create(1);
3967 if (!proxy_list) return 0;
3969 #ifdef HAVE_PTHREAD_H
3970 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3971 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3979 #ifdef HAVE_PTHREAD_H
3981 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3983 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3986 * Initialize the threads ONLY if we're spawning, AND
3987 * we're running normally.
3989 if (spawn_flag && !check_config &&
3990 (thread_pool_init(cs, &spawn_flag) < 0)) {
3996 * Move all of the thread calls to this file?
3998 * It may be best for the mutexes to be in this file...
4000 have_children = spawn_flag;
4003 DEBUG("%s: #### Skipping IP addresses and Ports ####",
4008 #ifdef WITH_SELF_PIPE
4010 * Child threads need a pipe to signal us, as do the
4013 if (pipe(self_pipe) < 0) {
4014 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
4018 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4019 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4023 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4024 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4029 if (!fr_event_fd_insert(el, 0, self_pipe[0],
4030 event_signal_handler, el)) {
4031 radlog(L_ERR, "Failed creating handler for signals");
4034 #endif /* WITH_SELF_PIPE */
4036 DEBUG("%s: #### Opening IP addresses and Ports ####",
4040 * The server temporarily switches to an unprivileged
4041 * user very early in the bootstrapping process.
4042 * However, some sockets MAY require privileged access
4043 * (bind to device, or to port < 1024, or to raw
4044 * sockets). Those sockets need to call suid up/down
4045 * themselves around the functions that need a privileged
4048 if (listen_init(cs, &head) < 0) {
4052 mainconfig.listen = head;
4055 * At this point, no one has any business *ever* going
4058 fr_suid_down_permanent();
4064 static int request_hash_cb(UNUSED void *ctx, void *data)
4066 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4069 rad_assert(request->in_proxy_hash == FALSE);
4072 ev_request_free(&request);
4079 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4081 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4083 ev_request_free(&request);
4089 void radius_event_free(void)
4092 * FIXME: Stop all threads, or at least check that
4093 * they're all waiting on the semaphore, and the queues
4099 * There are requests in the proxy hash that aren't
4100 * referenced from anywhere else. Remove them first.
4103 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4104 fr_packet_list_free(proxy_list);
4109 fr_packet_list_walk(pl, NULL, request_hash_cb);
4111 fr_packet_list_free(pl);
4114 fr_event_list_free(el);
4117 int radius_event_process(void)
4121 return fr_event_loop(el);
4124 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4126 request->options = RAD_REQUEST_OPTION_DEBUG2;
4128 if (request_pre_handler(request)) {
4129 rad_assert(fun != NULL);
4130 rad_assert(request != NULL);
4132 if (request->server) RDEBUG("server %s {",
4133 request->server != NULL ?
4134 request->server : "");
4137 if (request->server) RDEBUG("} # server %s",
4138 request->server != NULL ?
4139 request->server : "");
4141 request_post_handler(request);
4144 DEBUG2("Going to the next request");