2 * event.c Server event handling
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2007 The FreeRADIUS server project
21 * Copyright 2007 Alan DeKok <aland@deployingradius.com>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/radiusd.h>
28 #include <freeradius-devel/modules.h>
29 #include <freeradius-devel/event.h>
30 #include <freeradius-devel/detail.h>
32 #include <freeradius-devel/rad_assert.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
41 #define USEC (1000000)
43 extern pid_t radius_pid;
45 extern int check_config;
46 extern void force_log_reopen(void);
47 extern char *debug_condition;
50 * Ridiculous amounts of local state.
52 static fr_event_list_t *el = NULL;
53 static fr_packet_list_t *pl = NULL;
54 static int request_num_counter = 0;
55 static struct timeval now;
57 static int have_children;
58 static int just_started = TRUE;
62 #define WITH_SELF_PIPE (1)
67 static int self_pipe[2];
72 static pthread_mutex_t proxy_mutex;
73 static rad_listen_t *proxy_listener_list = NULL;
76 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
77 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
79 static pthread_t NO_SUCH_CHILD_PID;
82 * This is easier than ifdef's throughout the code.
84 #define PTHREAD_MUTEX_LOCK(_x)
85 #define PTHREAD_MUTEX_UNLOCK(_x)
86 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
88 radius_handle_request(request, fun);
94 * We need mutexes around the event FD list *only* in certain
97 #if defined (HAVE_PTHREAD_H) && (defined(WITH_PROXY) || defined(WITH_TCP))
98 static pthread_mutex_t fd_mutex;
99 #define FD_MUTEX_LOCK if (have_children) pthread_mutex_lock
100 #define FD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
103 * This is easier than ifdef's throughout the code.
105 #define FD_MUTEX_LOCK(_x)
106 #define FD_MUTEX_UNLOCK(_x)
110 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
113 static fr_packet_list_t *proxy_list = NULL;
114 static void remove_from_proxy_hash(REQUEST *request);
116 static void check_for_zombie_home_server(REQUEST *request);
118 #define remove_from_proxy_hash(foo)
121 static void request_post_handler(REQUEST *request);
122 static void wait_a_bit(void *ctx);
123 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
125 static void event_poll_detail(void *ctx);
128 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
131 radlog(L_ERR, "[%s:%d] %s", file, line, msg);
135 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
138 static void tv_add(struct timeval *tv, int usec_delay)
140 if (usec_delay > USEC) {
141 tv->tv_sec += usec_delay / USEC;
144 tv->tv_usec += usec_delay;
146 if (tv->tv_usec > USEC) {
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);
383 * Also locks the proxy mutex, so we have to call
384 * it with the mutex unlocked. Some systems
385 * don't support recursive mutexes.
387 if (!proxy_new_listener(request->home_server, 0)) {
388 radlog(L_ERR, "Failed to create a new socket for proxying requests.");
391 request->proxy->src_port = 0; /* Use any new socket */
395 RDEBUG2("ERROR: Failed allocating Id for new socket when proxying requests.");
402 request->proxy_listener = proxy_listener;
404 PTHREAD_MUTEX_LOCK(&proxy_mutex);
405 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
406 fr_packet_list_id_free(proxy_list, request->proxy);
407 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
408 radlog(L_PROXY, "Failed to insert entry into proxy list");
412 request->in_proxy_hash = TRUE;
415 * Keep track of maximum outstanding requests to a
416 * particular home server. 'max_outstanding' is
417 * enforced in home_server_ldb(), in realms.c.
419 if (request->home_server) {
420 request->home_server->currently_outstanding++;
424 request->proxy_listener->count++;
427 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
429 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
430 inet_ntop(request->proxy->dst_ipaddr.af,
431 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
432 request->proxy->dst_port,
440 * Called as BOTH an event, and in-line from other functions.
442 static void wait_for_proxy_id_to_expire(void *ctx)
444 REQUEST *request = ctx;
446 rad_assert(request->magic == REQUEST_MAGIC);
447 rad_assert(request->proxy != NULL);
449 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
450 request->when = request->proxy_when;
453 if (((request->proxy->code == PW_COA_REQUEST) ||
454 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
455 (request->packet->code != request->proxy->code)) {
456 request->when.tv_sec += request->home_server->coa_mrd;
459 request->when.tv_sec += request->home_server->response_window;
461 if ((request->num_proxied_requests == request->num_proxied_responses) ||
463 (request->home_server->proto == IPPROTO_TCP) ||
465 timercmp(&now, &request->when, >)) {
466 if (request->packet) {
467 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
468 request->number, request->packet->id,
469 (unsigned int) (request->timestamp - fr_start_time));
471 RDEBUG2("Cleaning up request %d with timestamp +%d",
473 (unsigned int) (request->timestamp - fr_start_time));
476 ev_request_free(&request);
480 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
484 #ifdef HAVE_PTHREAD_H
485 static void wait_for_child_to_die(void *ctx)
487 REQUEST *request = ctx;
489 rad_assert(request->magic == REQUEST_MAGIC);
492 * If it's still queued (waiting for a thread to pick it
493 * up) OR, it's running AND there's still a child thread
494 * handling it, THEN delay some more.
496 if ((request->child_state == REQUEST_QUEUED) ||
497 ((request->child_state == REQUEST_RUNNING) &&
498 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0))) {
501 * Cap delay at five minutes.
503 if (request->delay < (USEC * 60 * 5)) {
504 request->delay += (request->delay >> 1);
505 radlog(L_INFO, "WARNING: Child is hung for request %d.",
508 RDEBUG2("Child is still stuck for request %d",
511 tv_add(&request->when, request->delay);
513 INSERT_EVENT(wait_for_child_to_die, request);
517 RDEBUG2("Child is responsive for request %d", request->number);
518 remove_from_request_hash(request);
521 if (request->proxy) {
522 wait_for_proxy_id_to_expire(request);
527 ev_request_free(&request);
531 static void cleanup_delay(void *ctx)
533 REQUEST *request = ctx;
535 rad_assert(request->magic == REQUEST_MAGIC);
536 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
537 (request->child_state == REQUEST_DONE));
539 remove_from_request_hash(request);
542 if (request->proxy && request->in_proxy_hash) {
543 wait_for_proxy_id_to_expire(request);
548 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
549 request->number, request->packet->id,
550 (unsigned int) (request->timestamp - fr_start_time));
552 ev_request_free(&request);
557 * In daemon mode, AND this request has debug flags set.
559 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
561 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
565 const char *received, *from;
566 const fr_ipaddr_t *ip;
571 rad_assert(request->radlog != NULL);
573 if (direction == 0) {
574 received = "Received";
575 from = "from"; /* what else? */
576 ip = &packet->src_ipaddr;
577 port = packet->src_port;
580 received = "Sending";
581 from = "to"; /* hah! */
582 ip = &packet->dst_ipaddr;
583 port = packet->dst_port;
587 * Client-specific debugging re-prints the input
588 * packet into the client log.
590 * This really belongs in a utility library
592 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
593 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
594 received, fr_packet_codes[packet->code], from,
595 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
596 port, packet->id, packet->data_len);
598 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
600 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
602 packet->code, packet->id, packet->data_len);
605 for (vp = packet->vps; vp != NULL; vp = vp->next) {
606 vp_prints(buffer, sizeof(buffer), vp);
607 request->radlog(L_DBG, 0, request, "\t%s", buffer);
611 static void reject_delay(void *ctx)
613 REQUEST *request = ctx;
615 rad_assert(request->magic == REQUEST_MAGIC);
616 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
618 RDEBUG2("Sending delayed reject for request %d", request->number);
620 DEBUG_PACKET(request, request->reply, 1);
622 request->listener->send(request->listener, request);
624 request->when.tv_sec += request->root->cleanup_delay;
625 request->child_state = REQUEST_CLEANUP_DELAY;
627 INSERT_EVENT(cleanup_delay, request);
632 void revive_home_server(void *ctx)
634 home_server *home = ctx;
638 rad_assert(home->proto != IPPROTO_TCP);
641 home->state = HOME_STATE_ALIVE;
642 home->currently_outstanding = 0;
643 home->revive_time = now;
646 * Delete any outstanding events.
648 if (home->ev) fr_event_delete(el, &home->ev);
650 radlog(L_PROXY, "Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
651 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
652 buffer, sizeof(buffer)),
658 static void no_response_to_ping(void *ctx)
660 REQUEST *request = ctx;
664 rad_assert(request->home_server != NULL);
666 home = request->home_server;
668 rad_assert(home->proto != IPPROTO_TCP);
671 home->num_received_pings = 0;
673 radlog(L_ERR, "No response to status check %d for home server %s port %d",
675 inet_ntop(request->proxy->dst_ipaddr.af,
676 &request->proxy->dst_ipaddr.ipaddr,
677 buffer, sizeof(buffer)),
678 request->proxy->dst_port);
680 check_for_zombie_home_server(request);
682 wait_for_proxy_id_to_expire(request);
686 static void received_response_to_ping(REQUEST *request)
691 rad_assert(request->home_server != NULL);
693 home = request->home_server;
695 rad_assert(home->proto != IPPROTO_TCP);
698 home->num_received_pings++;
700 radlog(L_PROXY, "Received response to status check %d (%d in current sequence)",
701 request->number, home->num_received_pings);
704 * Remove the request from any hashes
706 fr_event_delete(el, &request->ev);
707 remove_from_proxy_hash(request);
708 rad_assert(request->in_request_hash == FALSE);
711 * The control socket may have marked the home server as
712 * alive. OR, it may have suddenly started responding to
713 * requests again. If so, don't re-do the "make alive"
716 if (home->state == HOME_STATE_ALIVE) return;
719 * We haven't received enough ping responses to mark it
720 * "alive". Wait a bit.
722 if (home->num_received_pings < home->num_pings_to_alive) {
726 home->state = HOME_STATE_ALIVE;
727 home->currently_outstanding = 0;
728 home->revive_time = now;
730 if (!fr_event_delete(el, &home->ev)) {
731 RDEBUG2("Hmm... no event for home server. Oh well.");
734 radlog(L_PROXY, "Marking home server %s port %d alive",
735 inet_ntop(request->proxy->dst_ipaddr.af,
736 &request->proxy->dst_ipaddr.ipaddr,
737 buffer, sizeof(buffer)),
738 request->proxy->dst_port);
743 * Called from start of zombie period, OR after control socket
744 * marks the home server dead.
746 static void ping_home_server(void *ctx)
749 home_server *home = ctx;
754 rad_assert(home->proto != IPPROTO_TCP);
757 if ((home->state == HOME_STATE_ALIVE) ||
758 (home->ping_check == HOME_PING_CHECK_NONE) ||
759 (home->ev != NULL)) {
763 request = request_alloc();
764 request->number = request_num_counter++;
766 request->proxy = rad_alloc(1);
767 rad_assert(request->proxy != NULL);
769 fr_event_now(el, &request->when);
770 home->when = request->when;
772 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
773 request->proxy->code = PW_STATUS_SERVER;
775 radius_pairmake(request, &request->proxy->vps,
776 "Message-Authenticator", "0x00", T_OP_SET);
778 } else if (home->type == HOME_TYPE_AUTH) {
779 request->proxy->code = PW_AUTHENTICATION_REQUEST;
781 radius_pairmake(request, &request->proxy->vps,
782 "User-Name", home->ping_user_name, T_OP_SET);
783 radius_pairmake(request, &request->proxy->vps,
784 "User-Password", home->ping_user_password, T_OP_SET);
785 radius_pairmake(request, &request->proxy->vps,
786 "Service-Type", "Authenticate-Only", T_OP_SET);
787 radius_pairmake(request, &request->proxy->vps,
788 "Message-Authenticator", "0x00", T_OP_SET);
791 #ifdef WITH_ACCOUNTING
792 request->proxy->code = PW_ACCOUNTING_REQUEST;
794 radius_pairmake(request, &request->proxy->vps,
795 "User-Name", home->ping_user_name, T_OP_SET);
796 radius_pairmake(request, &request->proxy->vps,
797 "Acct-Status-Type", "Stop", T_OP_SET);
798 radius_pairmake(request, &request->proxy->vps,
799 "Acct-Session-Id", "00000000", T_OP_SET);
800 vp = radius_pairmake(request, &request->proxy->vps,
801 "Event-Timestamp", "0", T_OP_SET);
802 vp->vp_date = now.tv_sec;
804 rad_assert("Internal sanity check failed");
808 radius_pairmake(request, &request->proxy->vps,
809 "NAS-Identifier", "Status Check. Are you alive?",
812 request->proxy->dst_ipaddr = home->ipaddr;
813 request->proxy->dst_port = home->port;
814 request->home_server = home;
816 rad_assert(request->proxy_listener == NULL);
818 if (!insert_into_proxy_hash(request)) {
819 radlog(L_PROXY, "Failed inserting status check %d into proxy hash. Discarding it.",
821 ev_request_free(&request);
824 rad_assert(request->proxy_listener != NULL);
825 request->proxy_listener->send(request->proxy_listener,
828 request->next_callback = NULL;
829 request->child_state = REQUEST_PROXIED;
830 gettimeofday(&request->when, NULL);
831 home->when = request->when;
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);
1109 rad_assert(request->ev == NULL);
1110 request->child_state = REQUEST_RUNNING;
1111 wait_a_bit(request);
1115 * Don't touch request due to race conditions
1120 * Do nothing more. The home server didn't respond,
1121 * but that isn't a catastrophic failure. Some home
1122 * servers don't respond to packets...
1124 if (home->proto == IPPROTO_TCP) {
1126 * FIXME: Set up TCP pinging on this connection.
1128 * Maybe the CONNECTION is dead, but the home
1129 * server is alive. In that case, we need to start
1130 * pinging on the connection.
1132 * This means doing the pinging BEFORE the
1133 * post_proxy_fail_handler above, as it may do
1134 * something with the request, and cause the
1135 * proxy listener to go away!
1141 if (home->state == HOME_STATE_IS_DEAD) {
1142 rad_assert(home->ev != NULL); /* or it will never wake up */
1147 * Enable the zombie period when we notice that the home
1148 * server hasn't responded. We do NOT back-date the start
1149 * of the zombie period.
1151 if (home->state == HOME_STATE_ALIVE) {
1152 home->state = HOME_STATE_ZOMBIE;
1153 home->zombie_period_start = now;
1155 radlog(L_PROXY, "Marking home server %s port %d as zombie (it looks like it is dead).",
1156 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1157 buffer, sizeof(buffer)),
1161 * Start pinging the home server.
1163 ping_home_server(home);
1168 static void wait_a_bit(void *ctx)
1170 struct timeval when;
1171 REQUEST *request = ctx;
1172 fr_event_callback_t callback = NULL;
1174 rad_assert(request->magic == REQUEST_MAGIC);
1177 * The socket was closed. Tell the request that
1178 * there is no point in continuing.
1180 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1181 goto stop_processing;
1186 * The CoA request is a new (internally generated)
1187 * request, created in a child thread. We therefore need
1188 * some way to tie its events back into the main event
1191 if (request->coa && !request->coa->proxy_reply &&
1192 request->coa->next_callback) {
1193 request->coa->when = request->coa->next_when;
1194 INSERT_EVENT(request->coa->next_callback, request->coa);
1195 request->coa->next_callback = NULL;
1196 request->coa->parent = NULL;
1197 request->coa = NULL;
1201 switch (request->child_state) {
1202 case REQUEST_QUEUED:
1203 case REQUEST_RUNNING:
1204 when = request->received;
1205 when.tv_sec += request->root->max_request_time;
1208 * Normally called from the event loop with the
1209 * proper event loop time. Otherwise, called from
1210 * post proxy fail handler, which sets "now", and
1211 * this call won't re-set it, because we're not
1212 * in the event loop.
1214 fr_event_now(el, &now);
1217 * Request still has more time. Continue
1220 if (timercmp(&now, &when, <) ||
1221 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1222 (request->child_state == REQUEST_QUEUED))) {
1223 if (request->delay < (USEC / 10)) {
1224 request->delay = USEC / 10;
1226 request->delay += request->delay >> 1;
1230 * Cap wait at some sane value for detail
1233 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1234 (request->delay > (request->root->max_request_time * USEC))) {
1235 request->delay = request->root->max_request_time * USEC;
1239 request->when = now;
1240 tv_add(&request->when, request->delay);
1241 callback = wait_a_bit;
1246 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1248 * A child thread MAY still be running on the
1249 * request. Ask the thread to stop working on
1252 if (have_children &&
1253 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1254 request->master_state = REQUEST_STOP_PROCESSING;
1256 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1258 request->module ? request->module : "<server core>",
1259 request->component ? request->component : "<server core>");
1261 request->delay = USEC / 4;
1262 tv_add(&request->when, request->delay);
1263 callback = wait_for_child_to_die;
1269 * Else no child thread is processing the
1270 * request. We probably should have just marked
1271 * the request as 'done' elsewhere, like in the
1272 * post-proxy-fail handler. But doing that would
1273 * involve checking for max_request_time in
1274 * multiple places, so this may be simplest.
1276 request->child_state = REQUEST_DONE;
1280 * Mark the request as no longer running,
1284 #ifdef HAVE_PTHREAD_H
1285 request->child_pid = NO_SUCH_CHILD_PID;
1290 * This is a CoA request. It's been divorced
1291 * from everything else, so we clean it up now.
1293 if (!request->in_request_hash &&
1295 (request->packet->code != request->proxy->code) &&
1296 ((request->proxy->code == PW_COA_REQUEST) ||
1297 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1299 * FIXME: Do CoA MIBs
1301 ev_request_free(&request);
1305 request_stats_final(request);
1306 cleanup_delay(request);
1309 case REQUEST_REJECT_DELAY:
1310 case REQUEST_CLEANUP_DELAY:
1311 #ifdef HAVE_PTHREAD_H
1312 request->child_pid = NO_SUCH_CHILD_PID;
1314 request_stats_final(request);
1316 case REQUEST_PROXIED:
1317 rad_assert(request->next_callback != NULL);
1318 rad_assert(request->next_callback != wait_a_bit);
1320 request->when = request->next_when;
1321 callback = request->next_callback;
1322 request->next_callback = NULL;
1326 rad_panic("Internal sanity check failure");
1331 * Something major went wrong. Discard the request, and
1334 * FIXME: No idea why this happens or how to fix it...
1335 * It seems to happen *only* when requests are proxied,
1336 * and where the home server doesn't respond. So it looks
1337 * like a race condition above, but it happens in debug
1338 * mode, with no threads...
1341 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1342 ev_request_free(&request);
1346 INSERT_EVENT(callback, request);
1350 static void no_response_to_coa_request(void *ctx)
1352 REQUEST *request = ctx;
1355 rad_assert(request->magic == REQUEST_MAGIC);
1356 rad_assert(request->child_state == REQUEST_PROXIED);
1357 rad_assert(request->home_server != NULL);
1358 rad_assert(!request->in_request_hash);
1360 radlog(L_ERR, "No response to CoA request sent to %s",
1361 inet_ntop(request->proxy->dst_ipaddr.af,
1362 &request->proxy->dst_ipaddr.ipaddr,
1363 buffer, sizeof(buffer)));
1368 request->packet->code |= (PW_COA_REQUEST << 8);
1369 post_proxy_fail_handler(request);
1373 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1377 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1384 packet->data = NULL;
1385 packet->data_len = 0;
1388 return 1; /* time stamp updated */
1393 * Called when we haven't received a response to a CoA request.
1395 static void retransmit_coa_request(void *ctx)
1399 REQUEST *request = ctx;
1401 rad_assert(request->magic == REQUEST_MAGIC);
1402 rad_assert(request->child_state == REQUEST_PROXIED);
1403 rad_assert(request->home_server != NULL);
1404 rad_assert(!request->in_request_hash);
1405 rad_assert(request->parent == NULL);
1407 fr_event_now(el, &now);
1410 * Cap count at MRC, if it is non-zero.
1412 if (request->home_server->coa_mrc &&
1413 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1414 no_response_to_coa_request(request);
1419 * RFC 5080 Section 2.2.1
1421 * RT = 2*RTprev + RAND*RTprev
1422 * = 1.9 * RTprev + rand(0,.2) * RTprev
1423 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1426 delay ^= (delay >> 16);
1428 frac = request->delay / 5;
1429 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1431 delay += (2 * request->delay) - (request->delay / 10);
1434 * Cap delay at MRT, if MRT is non-zero.
1436 if (request->home_server->coa_mrt &&
1437 (delay > (request->home_server->coa_mrt * USEC))) {
1438 int mrt_usec = request->home_server->coa_mrt * USEC;
1441 * delay = MRT + RAND * MRT
1442 * = 0.9 MRT + rand(0,.2) * MRT
1445 delay ^= (delay >> 15);
1447 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1448 delay += mrt_usec - (mrt_usec / 10);
1451 request->delay = delay;
1452 request->when = now;
1453 tv_add(&request->when, request->delay);
1454 mrd = request->proxy_when;
1455 mrd.tv_sec += request->home_server->coa_mrd;
1458 * Cap duration at MRD.
1460 if (timercmp(&mrd, &request->when, <)) {
1461 request->when = mrd;
1462 INSERT_EVENT(no_response_to_coa_request, request);
1465 INSERT_EVENT(retransmit_coa_request, request);
1468 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1470 * Keep a copy of the old Id so that the
1471 * re-transmitted request doesn't re-use the old
1474 RADIUS_PACKET old = *request->proxy;
1477 * Don't free the old Id on error.
1479 if (!insert_into_proxy_hash(request)) {
1480 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1485 * Now that we have a new Id, free the old one.
1487 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1488 fr_packet_list_yank(proxy_list, &old);
1489 fr_packet_list_id_free(proxy_list, &old);
1490 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1492 request->num_proxied_requests = 0;
1493 request->num_proxied_responses = 0;
1496 request->num_proxied_requests++;
1497 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1499 request->proxy_listener->send(request->proxy_listener,
1505 * The original request is either DONE, or in CLEANUP_DELAY.
1507 static int originated_coa_request(REQUEST *request)
1509 int delay, rcode, pre_proxy_type = 0;
1515 rad_assert(request->proxy == NULL);
1516 rad_assert(!request->in_proxy_hash);
1517 rad_assert(request->proxy_reply == NULL);
1519 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1520 if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1522 if (vp->vp_integer == 0) {
1523 ev_request_free(&request->coa);
1524 return 1; /* success */
1527 if (!request->coa) request_alloc_coa(request);
1528 if (!request->coa) return 0;
1534 * src_ipaddr will be set up in proxy_encode.
1536 memset(&ipaddr, 0, sizeof(ipaddr));
1537 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1539 ipaddr.af = AF_INET;
1540 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1542 } else if ((vp = pairfind(coa->proxy->vps,
1543 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1544 ipaddr.af = AF_INET6;
1545 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1547 } else if ((vp = pairfind(coa->proxy->vps,
1548 PW_HOME_SERVER_POOL)) != NULL) {
1549 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1551 if (!coa->home_pool) {
1552 RDEBUG2("WARNING: No such home_server_pool %s",
1555 ev_request_free(&request->coa);
1562 } else if (request->client->coa_pool) {
1563 coa->home_pool = request->client->coa_pool;
1565 } else if (request->client->coa_server) {
1566 coa->home_server = request->client->coa_server;
1570 * If all else fails, send it to the client that
1571 * originated this request.
1573 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1577 * Use the pool, if it exists.
1579 if (coa->home_pool) {
1580 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1581 if (!coa->home_server) {
1582 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1586 } else if (!coa->home_server) {
1587 int port = PW_COA_UDP_PORT;
1589 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1590 if (vp) port = vp->vp_integer;
1592 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1593 if (!coa->home_server) {
1594 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1595 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1596 buffer, sizeof(buffer)), port);
1601 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1603 switch (vp->vp_integer) {
1604 case PW_COA_REQUEST:
1605 case PW_DISCONNECT_REQUEST:
1606 coa->proxy->code = vp->vp_integer;
1610 DEBUG("Cannot set CoA Packet-Type to code %d",
1616 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1619 * The rest of the server code assumes that
1620 * request->packet && request->reply exist. Copy them
1621 * from the original request.
1623 rad_assert(coa->packet != NULL);
1624 rad_assert(coa->packet->vps == NULL);
1625 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1626 coa->packet->vps = paircopy(request->packet->vps);
1627 coa->packet->data = NULL;
1628 rad_assert(coa->reply != NULL);
1629 rad_assert(coa->reply->vps == NULL);
1630 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1631 coa->reply->vps = paircopy(request->reply->vps);
1632 coa->reply->data = NULL;
1633 coa->config_items = paircopy(request->config_items);
1636 * Call the pre-proxy routines.
1638 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1640 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1641 pre_proxy_type = vp->vp_integer;
1644 if (coa->home_pool && coa->home_pool->virtual_server) {
1645 const char *old_server = coa->server;
1647 coa->server = coa->home_pool->virtual_server;
1648 RDEBUG2(" server %s {", coa->server);
1649 rcode = module_pre_proxy(pre_proxy_type, coa);
1651 coa->server = old_server;
1653 rcode = module_pre_proxy(pre_proxy_type, coa);
1660 * Only send the CoA packet if the pre-proxy code succeeded.
1662 case RLM_MODULE_NOOP:
1664 case RLM_MODULE_UPDATED:
1669 * Source IP / port is set when the proxy socket
1672 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1673 coa->proxy->dst_port = coa->home_server->port;
1675 if (!insert_into_proxy_hash(coa)) {
1676 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1681 * We CANNOT divorce the CoA request from the parent
1682 * request. This function is running in a child thread,
1683 * and we need access to the main event loop in order to
1684 * to add the timers for the CoA packet. See
1689 * Forget about the original request completely at this
1694 gettimeofday(&request->proxy_when, NULL);
1695 request->received = request->next_when = request->proxy_when;
1696 rad_assert(request->proxy_reply == NULL);
1699 * Implement re-transmit algorithm as per RFC 5080
1702 * We want IRT + RAND*IRT
1703 * or 0.9 IRT + rand(0,.2) IRT
1705 * 2^20 ~ USEC, and we want 2.
1706 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1708 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1709 request->delay = delay * request->home_server->coa_irt;
1710 delay = request->home_server->coa_irt * USEC;
1711 delay -= delay / 10;
1712 delay += request->delay;
1714 request->delay = delay;
1715 tv_add(&request->next_when, delay);
1716 request->next_callback = retransmit_coa_request;
1719 * Note that we set proxied BEFORE sending the packet.
1721 * Once we send it, the request is tainted, as
1722 * another thread may have picked it up. Don't
1725 request->num_proxied_requests = 1;
1726 request->num_proxied_responses = 0;
1727 request->child_pid = NO_SUCH_CHILD_PID;
1729 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1731 request->child_state = REQUEST_PROXIED;
1733 DEBUG_PACKET(request, request->proxy, 1);
1735 request->proxy_listener->send(request->proxy_listener,
1739 #endif /* WITH_COA */
1742 static int process_proxy_reply(REQUEST *request)
1745 int post_proxy_type = 0;
1749 * Delete any reply we had accumulated until now.
1751 pairfree(&request->reply->vps);
1754 * Run the packet through the post-proxy stage,
1755 * BEFORE playing games with the attributes.
1757 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1759 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1760 post_proxy_type = vp->vp_integer;
1763 if (request->home_pool && request->home_pool->virtual_server) {
1764 const char *old_server = request->server;
1766 request->server = request->home_pool->virtual_server;
1767 RDEBUG2(" server %s {", request->server);
1768 rcode = module_post_proxy(post_proxy_type, request);
1770 request->server = old_server;
1772 rcode = module_post_proxy(post_proxy_type, request);
1776 if (request->packet->code == request->proxy->code)
1778 * Don't run the next bit if we originated a CoA
1779 * packet, after receiving an Access-Request or
1780 * Accounting-Request.
1785 * There may NOT be a proxy reply, as we may be
1786 * running Post-Proxy-Type = Fail.
1788 if (request->proxy_reply) {
1790 * Delete the Proxy-State Attributes from
1791 * the reply. These include Proxy-State
1792 * attributes from us and remote server.
1794 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1797 * Add the attributes left in the proxy
1798 * reply to the reply list.
1800 pairadd(&request->reply->vps, request->proxy_reply->vps);
1801 request->proxy_reply->vps = NULL;
1804 * Free proxy request pairs.
1806 pairfree(&request->proxy->vps);
1810 default: /* Don't do anything */
1812 case RLM_MODULE_FAIL:
1813 /* FIXME: debug print stuff */
1814 request->child_state = REQUEST_DONE;
1817 case RLM_MODULE_HANDLED:
1818 /* FIXME: debug print stuff */
1819 request->child_state = REQUEST_DONE;
1827 static int request_pre_handler(REQUEST *request)
1831 rad_assert(request->magic == REQUEST_MAGIC);
1832 rad_assert(request->packet != NULL);
1834 request->child_state = REQUEST_RUNNING;
1837 * Don't decode the packet if it's an internal "fake"
1838 * request. Instead, just return so that the caller can
1841 if (request->packet->dst_port == 0) {
1842 request->username = pairfind(request->packet->vps,
1844 request->password = pairfind(request->packet->vps,
1851 * Put the decoded packet into it's proper place.
1853 if (request->proxy_reply != NULL) {
1855 * FIXME: For now, we can only proxy RADIUS packets.
1857 * In order to proxy other packets, we need to
1858 * somehow cache the "decode" function.
1860 rcode = rad_decode(request->proxy_reply, request->proxy,
1861 request->home_server->secret);
1862 DEBUG_PACKET(request, request->proxy_reply, 0);
1865 if (request->packet->vps == NULL) {
1866 rcode = request->listener->decode(request->listener, request);
1868 if (debug_condition) {
1870 const char *my_debug = debug_condition;
1873 * Ignore parse errors.
1875 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1879 request->options = 2;
1880 request->radlog = radlog_request;
1884 DEBUG_PACKET(request, request->packet, 0);
1890 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1891 request->child_state = REQUEST_DONE;
1895 if (!request->username) {
1896 request->username = pairfind(request->packet->vps,
1901 if (request->proxy) {
1902 return process_proxy_reply(request);
1912 * Do state handling when we proxy a request.
1914 static int proxy_request(REQUEST *request)
1916 struct timeval when;
1919 if (request->home_server->server) {
1920 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1924 if (!insert_into_proxy_hash(request)) {
1925 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1929 request->proxy_listener->encode(request->proxy_listener, request);
1931 when = request->received;
1932 when.tv_sec += request->root->max_request_time;
1934 gettimeofday(&request->proxy_when, NULL);
1936 request->next_when = request->proxy_when;
1937 request->next_when.tv_sec += request->home_server->response_window;
1939 rad_assert(request->home_server->response_window > 0);
1941 if (timercmp(&when, &request->next_when, <)) {
1942 request->next_when = when;
1944 request->next_callback = no_response_to_proxied_request;
1946 RDEBUG2("Proxying request %d to home server %s port %d",
1948 inet_ntop(request->proxy->dst_ipaddr.af,
1949 &request->proxy->dst_ipaddr.ipaddr,
1950 buffer, sizeof(buffer)),
1951 request->proxy->dst_port);
1954 * Note that we set proxied BEFORE sending the packet.
1956 * Once we send it, the request is tainted, as
1957 * another thread may have picked it up. Don't
1960 request->num_proxied_requests = 1;
1961 request->num_proxied_responses = 0;
1962 #ifdef HAVE_PTHREAD_H
1963 request->child_pid = NO_SUCH_CHILD_PID;
1965 request->child_state = REQUEST_PROXIED;
1967 DEBUG_PACKET(request, request->proxy, 1);
1969 request->proxy_listener->send(request->proxy_listener,
1976 * "Proxy" the request by sending it to a new virtual server.
1978 static int proxy_to_virtual_server(REQUEST *request)
1981 RAD_REQUEST_FUNP fun;
1983 if (!request->home_server || !request->home_server->server) return 0;
1985 if (request->parent) {
1986 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1990 fake = request_alloc_fake(request);
1992 RDEBUG2("WARNING: Out of memory");
1996 fake->packet->vps = paircopy(request->proxy->vps);
1997 fake->server = request->home_server->server;
1999 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2000 fun = rad_authenticate;
2002 #ifdef WITH_ACCOUNTING
2003 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2004 fun = rad_accounting;
2008 RDEBUG2("Unknown packet type %d", request->proxy->code);
2009 ev_request_free(&fake);
2013 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2014 radius_handle_request(fake, fun);
2015 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2017 if (fake->reply->code != 0) {
2018 request->proxy_reply = fake->reply;
2022 * There was no response
2024 setup_post_proxy_fail(request);
2027 ev_request_free(&fake);
2029 process_proxy_reply(request);
2032 * Process it through the normal section again, but ONLY
2033 * if we received a proxy reply..
2035 if (request->proxy_reply) {
2036 if (request->server) RDEBUG("server %s {",
2037 request->server != NULL ?
2038 request->server : "");
2041 if (request->server) RDEBUG("} # server %s",
2042 request->server != NULL ?
2043 request->server : "");
2046 return 2; /* success, but NOT '1' !*/
2050 * Return 1 if we did proxy it, or the proxy attempt failed
2051 * completely. Either way, the caller doesn't touch the request
2052 * any more if we return 1.
2054 static int successfully_proxied_request(REQUEST *request)
2057 int pre_proxy_type = 0;
2058 VALUE_PAIR *realmpair;
2059 VALUE_PAIR *strippedname;
2061 char *realmname = NULL;
2063 REALM *realm = NULL;
2067 * If it was already proxied, do nothing.
2069 * FIXME: This should really be a serious error.
2071 if (request->in_proxy_hash ||
2072 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2076 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2077 if (!realmpair || (realmpair->length == 0)) {
2080 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2083 switch (request->packet->code) {
2084 case PW_AUTHENTICATION_REQUEST:
2085 pool_type = HOME_TYPE_AUTH;
2088 #ifdef WITH_ACCOUNTING
2089 case PW_ACCOUNTING_REQUEST:
2090 pool_type = HOME_TYPE_ACCT;
2095 case PW_COA_REQUEST:
2096 case PW_DISCONNECT_REQUEST:
2097 pool_type = HOME_TYPE_COA;
2105 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2107 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2112 realmname = NULL; /* no realms */
2117 realmname = (char *) realmpair->vp_strvalue;
2119 realm = realm_find2(realmname);
2121 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2126 * Figure out which pool to use.
2128 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2129 pool = realm->auth_pool;
2131 #ifdef WITH_ACCOUNTING
2132 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2133 pool = realm->acct_pool;
2137 } else if ((request->packet->code == PW_COA_REQUEST) ||
2138 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2139 pool = realm->acct_pool;
2143 rad_panic("Internal sanity check failed");
2147 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2153 home = home_server_ldb(realmname, pool, request);
2155 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2159 request->home_pool = pool;
2163 * Once we've decided to proxy a request, we cannot send
2164 * a CoA packet. So we free up any CoA packet here.
2166 ev_request_free(&request->coa);
2169 * Remember that we sent the request to a Realm.
2171 if (realmname) pairadd(&request->packet->vps,
2172 pairmake("Realm", realmname, T_OP_EQ));
2175 * Strip the name, if told to.
2177 * Doing it here catches the case of proxied tunneled
2180 if (realm && (realm->striprealm == TRUE) &&
2181 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2183 * If there's a Stripped-User-Name attribute in
2184 * the request, then use THAT as the User-Name
2185 * for the proxied request, instead of the
2188 * This is done by making a copy of the
2189 * Stripped-User-Name attribute, turning it into
2190 * a User-Name attribute, deleting the
2191 * Stripped-User-Name and User-Name attributes
2192 * from the vps list, and making the new
2193 * User-Name the head of the vps list.
2195 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2197 vp = radius_paircreate(request, NULL,
2198 PW_USER_NAME, PW_TYPE_STRING);
2199 rad_assert(vp != NULL); /* handled by above function */
2200 /* Insert at the START of the list */
2201 vp->next = request->proxy->vps;
2202 request->proxy->vps = vp;
2204 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2205 sizeof(vp->vp_strvalue));
2206 vp->length = strippedname->length;
2209 * Do NOT delete Stripped-User-Name.
2214 * If there is no PW_CHAP_CHALLENGE attribute but
2215 * there is a PW_CHAP_PASSWORD we need to add it
2216 * since we can't use the request authenticator
2217 * anymore - we changed it.
2219 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2220 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2221 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2222 vp = radius_paircreate(request, &request->proxy->vps,
2223 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2224 vp->length = AUTH_VECTOR_LEN;
2225 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2229 * The RFC's say we have to do this, but FreeRADIUS
2232 vp = radius_paircreate(request, &request->proxy->vps,
2233 PW_PROXY_STATE, PW_TYPE_OCTETS);
2234 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2235 request->packet->id);
2236 vp->length = strlen(vp->vp_strvalue);
2239 * Should be done BEFORE inserting into proxy hash, as
2240 * pre-proxy may use this information, or change it.
2242 request->proxy->code = request->packet->code;
2245 * Call the pre-proxy routines.
2247 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2249 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2250 pre_proxy_type = vp->vp_integer;
2253 rad_assert(request->home_pool != NULL);
2255 if (request->home_pool->virtual_server) {
2256 const char *old_server = request->server;
2258 request->server = request->home_pool->virtual_server;
2259 RDEBUG2(" server %s {", request->server);
2260 rcode = module_pre_proxy(pre_proxy_type, request);
2262 request->server = old_server;
2264 rcode = module_pre_proxy(pre_proxy_type, request);
2267 case RLM_MODULE_FAIL:
2268 case RLM_MODULE_INVALID:
2269 case RLM_MODULE_NOTFOUND:
2270 case RLM_MODULE_USERLOCK:
2272 /* FIXME: debug print failed stuff */
2275 case RLM_MODULE_REJECT:
2276 case RLM_MODULE_HANDLED:
2280 * Only proxy the packet if the pre-proxy code succeeded.
2282 case RLM_MODULE_NOOP:
2284 case RLM_MODULE_UPDATED:
2289 * If it's a fake request, don't send the proxy
2290 * packet. The outer tunnel session will take
2291 * care of doing that.
2293 if (request->packet->dst_port == 0) {
2294 request->home_server = NULL;
2298 if (request->home_server->server) {
2299 return proxy_to_virtual_server(request);
2302 if (!proxy_request(request)) {
2303 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2311 static void request_post_handler(REQUEST *request)
2313 int child_state = -1;
2314 struct timeval when;
2317 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2319 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2320 RDEBUG2("Request %d was cancelled.", request->number);
2321 #ifdef HAVE_PTHREAD_H
2322 request->child_pid = NO_SUCH_CHILD_PID;
2324 child_state = REQUEST_DONE;
2328 if (request->child_state != REQUEST_RUNNING) {
2329 rad_panic("Internal sanity check failed");
2334 * If it's not in the request hash, it's a CoA request.
2337 if (!request->in_request_hash &&
2339 ((request->proxy->code == PW_COA_REQUEST) ||
2340 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2341 request->next_callback = NULL;
2342 child_state = REQUEST_DONE;
2348 * Catch Auth-Type := Reject BEFORE proxying the packet.
2350 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2351 (request->reply->code == 0) &&
2352 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2353 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2354 request->reply->code = PW_AUTHENTICATION_REJECT;
2358 if (request->root->proxy_requests &&
2359 !request->in_proxy_hash &&
2360 (request->reply->code == 0) &&
2361 (request->packet->dst_port != 0) &&
2362 (request->packet->code != PW_STATUS_SERVER)) {
2363 int rcode = successfully_proxied_request(request);
2365 if (rcode == 1) return; /* request is invalid */
2368 * Failed proxying it (dead home servers, etc.)
2369 * Run it through Post-Proxy-Type = Fail, and
2370 * respond to the request.
2372 * Note that we're in a child thread here, so we
2373 * do NOT re-schedule the request. Instead, we
2374 * do what we would have done, which is run the
2375 * pre-handler, a NULL request handler, and then
2378 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2379 request_pre_handler(request);
2383 * Else we weren't supposed to proxy it,
2384 * OR we proxied it internally to a virutal server.
2390 * Fake requests don't get encoded or signed. The caller
2391 * also requires the reply VP's, so we don't free them
2394 if (request->packet->dst_port == 0) {
2395 /* FIXME: RDEBUG going to the next request */
2396 #ifdef HAVE_PTHREAD_H
2397 request->child_pid = NO_SUCH_CHILD_PID;
2399 request->child_state = REQUEST_DONE;
2405 * Copy Proxy-State from the request to the reply.
2407 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2408 if (vp) pairadd(&request->reply->vps, vp);
2412 * Access-Requests get delayed or cached.
2414 switch (request->packet->code) {
2415 case PW_AUTHENTICATION_REQUEST:
2416 gettimeofday(&request->next_when, NULL);
2418 if (request->reply->code == 0) {
2420 * Check if the lack of response is intentional.
2422 vp = pairfind(request->config_items,
2423 PW_RESPONSE_PACKET_TYPE);
2425 RDEBUG2("There was no response configured: rejecting request %d",
2427 request->reply->code = PW_AUTHENTICATION_REJECT;
2429 } else if (vp->vp_integer == 256) {
2430 RDEBUG2("Not responding to request %d",
2434 * Force cleanup after a long
2435 * time, so that we don't
2436 * re-process the packet.
2438 request->next_when.tv_sec += request->root->max_request_time;
2439 request->next_callback = cleanup_delay;
2440 child_state = REQUEST_CLEANUP_DELAY;
2443 request->reply->code = vp->vp_integer;
2449 * Run rejected packets through
2451 * Post-Auth-Type = Reject
2453 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2454 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2455 vp = radius_pairmake(request, &request->config_items,
2456 "Post-Auth-Type", "Reject",
2458 if (vp) rad_postauth(request);
2461 * If configured, delay Access-Reject packets.
2463 * If request->root->reject_delay = 0, we discover
2464 * that we have to send the packet now.
2466 when = request->received;
2467 when.tv_sec += request->root->reject_delay;
2469 if (timercmp(&when, &request->next_when, >)) {
2470 RDEBUG2("Delaying reject of request %d for %d seconds",
2472 request->root->reject_delay);
2473 request->next_when = when;
2474 request->next_callback = reject_delay;
2475 #ifdef HAVE_PTHREAD_H
2476 request->child_pid = NO_SUCH_CHILD_PID;
2478 request->child_state = REQUEST_REJECT_DELAY;
2484 case PW_COA_REQUEST:
2485 case PW_DISCONNECT_REQUEST:
2487 request->next_when.tv_sec += request->root->cleanup_delay;
2488 request->next_callback = cleanup_delay;
2489 child_state = REQUEST_CLEANUP_DELAY;
2492 case PW_ACCOUNTING_REQUEST:
2493 request->next_callback = NULL; /* just to be safe */
2494 child_state = REQUEST_DONE;
2498 * FIXME: Status-Server should probably not be
2501 case PW_STATUS_SERVER:
2502 request->next_callback = NULL;
2503 child_state = REQUEST_DONE;
2510 request->next_callback = NULL;
2511 child_state = REQUEST_DONE;
2516 * Suppress "no reply" packets here, unless we're reading
2517 * from the "detail" file. In that case, we've got to
2518 * tell the detail file handler that the request is dead,
2519 * and it should re-send it.
2520 * If configured, encode, sign, and send.
2522 if ((request->reply->code != 0) ||
2523 (request->listener->type == RAD_LISTEN_DETAIL)) {
2524 DEBUG_PACKET(request, request->reply, 1);
2525 request->listener->send(request->listener, request);
2530 * Now that we've completely processed the request,
2531 * see if we need to originate a CoA request.
2534 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2535 if (!originated_coa_request(request)) {
2536 RDEBUG2("Do CoA Fail handler here");
2538 /* request->coa is stil set, so we can update events */
2544 * Clean up. These are no longer needed.
2546 pairfree(&request->config_items);
2548 pairfree(&request->packet->vps);
2549 request->username = NULL;
2550 request->password = NULL;
2552 pairfree(&request->reply->vps);
2555 if (request->proxy) {
2556 pairfree(&request->proxy->vps);
2558 if (request->proxy_reply) {
2559 pairfree(&request->proxy_reply->vps);
2564 * We're not tracking responses from the home
2565 * server, we can therefore free this memory in
2568 if (!request->in_proxy_hash) {
2569 rad_free(&request->proxy);
2570 rad_free(&request->proxy_reply);
2571 request->home_server = NULL;
2577 RDEBUG2("Finished request %d.", request->number);
2578 rad_assert(child_state >= 0);
2579 request->child_state = child_state;
2582 * Single threaded mode: update timers now.
2584 if (!have_children) wait_a_bit(request);
2588 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2594 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2595 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2597 switch (request->child_state) {
2598 case REQUEST_QUEUED:
2599 case REQUEST_RUNNING:
2603 radlog(L_ERR, "Discarding duplicate request from "
2604 "client %s port %d - ID: %d due to unfinished request %d",
2606 request->packet->src_port,request->packet->id,
2611 case REQUEST_PROXIED:
2613 * We're not supposed to have duplicate
2614 * accounting packets. The other states handle
2615 * duplicates fine (discard, or send duplicate
2616 * reply). But we do NOT want to retransmit an
2617 * accounting request here, because that would
2618 * involve updating the Acct-Delay-Time, and
2619 * therefore changing the packet Id, etc.
2621 * Instead, we just discard the packet. We may
2622 * eventually respond, or the client will send a
2623 * new accounting packet.
2625 * The same comments go for Status-Server, and
2626 * other packet types.
2628 * FIXME: coa: when we proxy CoA && Disconnect
2629 * packets, this logic has to be fixed.
2631 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2635 check_for_zombie_home_server(request);
2638 * If we've just discovered that the home server
2639 * is dead, OR the socket has been closed, look for
2640 * another connection to a home server.
2642 if (((request->packet->dst_port != 0) &&
2643 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2644 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2647 remove_from_proxy_hash(request);
2649 home = home_server_ldb(NULL, request->home_pool, request);
2651 RDEBUG2("Failed to find live home server for request %d", request->number);
2654 * Do post-request processing,
2655 * and any insertion of necessary
2658 post_proxy_fail_handler(request);
2662 request->proxy->code = request->packet->code;
2665 * Free the old packet, to force re-encoding
2667 free(request->proxy->data);
2668 request->proxy->data = NULL;
2669 request->proxy->data_len = 0;
2672 * This request failed over to a virtual
2673 * server. Push it back onto the queue
2676 if (request->home_server->server) {
2677 proxy_fallback_handler(request);
2682 * Try to proxy the request.
2684 if (!proxy_request(request)) {
2685 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2686 goto no_home_servers;
2690 * This code executes in the main server
2691 * thread, so there's no need for locking.
2693 rad_assert(request->next_callback != NULL);
2694 INSERT_EVENT(request->next_callback, request);
2695 request->next_callback = NULL;
2697 } /* else the home server is still alive */
2700 if (request->home_server->proto == IPPROTO_TCP) {
2701 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2702 inet_ntop(request->proxy->dst_ipaddr.af,
2703 &request->proxy->dst_ipaddr.ipaddr,
2704 buffer, sizeof(buffer)),
2705 request->proxy->dst_port,
2706 request->proxy->id);
2711 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2712 inet_ntop(request->proxy->dst_ipaddr.af,
2713 &request->proxy->dst_ipaddr.ipaddr,
2714 buffer, sizeof(buffer)),
2715 request->proxy->dst_port,
2716 request->proxy->id);
2717 request->num_proxied_requests++;
2719 DEBUG_PACKET(request, request->proxy, 1);
2720 request->proxy_listener->send(request->proxy_listener,
2725 case REQUEST_REJECT_DELAY:
2726 RDEBUG2("Waiting to send Access-Reject "
2727 "to client %s port %d - ID: %d",
2729 request->packet->src_port, request->packet->id);
2732 case REQUEST_CLEANUP_DELAY:
2734 if (request->reply->code == 0) {
2735 RDEBUG2("Ignoring retransmit from client %s port %d "
2736 "- ID: %d, no reply was configured",
2738 request->packet->src_port, request->packet->id);
2743 * FIXME: This sends duplicate replies to
2744 * accounting requests, even if Acct-Delay-Time
2745 * or Event-Timestamp is in the packet. In those
2746 * cases, the Id should be changed, and the packet
2749 RDEBUG2("Sending duplicate reply "
2750 "to client %s port %d - ID: %d",
2752 request->packet->src_port, request->packet->id);
2753 DEBUG_PACKET(request, request->reply, 1);
2754 request->listener->send(request->listener, request);
2760 static void received_conflicting_request(REQUEST *request,
2761 const RADCLIENT *client)
2763 radlog(L_ERR, "Received conflicting packet from "
2764 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2766 request->packet->src_port, request->packet->id,
2770 * Nuke it from the request hash, so we can receive new
2773 remove_from_request_hash(request);
2775 switch (request->child_state) {
2777 * Tell it to stop, and wait for it to do so.
2780 request->master_state = REQUEST_STOP_PROCESSING;
2781 request->delay += request->delay >> 1;
2783 tv_add(&request->when, request->delay);
2785 INSERT_EVENT(wait_for_child_to_die, request);
2789 * Catch race conditions. It may have switched
2790 * from running to done while this code is being
2793 case REQUEST_REJECT_DELAY:
2794 case REQUEST_CLEANUP_DELAY:
2801 static int can_handle_new_request(RADIUS_PACKET *packet,
2803 struct main_config_t *root)
2806 * Count the total number of requests, to see if
2807 * there are too many. If so, return with an
2810 if (root->max_requests) {
2811 int request_count = fr_packet_list_num_elements(pl);
2814 * This is a new request. Let's see if
2815 * it makes us go over our configured
2818 if (request_count > root->max_requests) {
2819 radlog(L_ERR, "Dropping request (%d is too many): "
2820 "from client %s port %d - ID: %d", request_count,
2822 packet->src_port, packet->id);
2823 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2824 "\tThe value for 'max_requests' is probably set too low.\n");
2826 } /* else there were a small number of requests */
2827 } /* else there was no configured limit for requests */
2830 * FIXME: Add per-client checks. If one client is sending
2831 * too many packets, start discarding them.
2833 * We increment the counters here, and decrement them
2834 * when the response is sent... somewhere in this file.
2838 * FUTURE: Add checks for system load. If the system is
2839 * busy, start dropping requests...
2841 * We can probably keep some statistics ourselves... if
2842 * there are more requests coming in than we can handle,
2843 * start dropping some.
2850 int received_request(rad_listen_t *listener,
2851 RADIUS_PACKET *packet, REQUEST **prequest,
2854 RADIUS_PACKET **packet_p;
2855 REQUEST *request = NULL;
2856 struct main_config_t *root = &mainconfig;
2858 packet_p = fr_packet_list_find(pl, packet);
2860 request = fr_packet2myptr(REQUEST, packet, packet_p);
2861 rad_assert(request->in_request_hash);
2863 if ((request->packet->data_len == packet->data_len) &&
2864 (memcmp(request->packet->vector, packet->vector,
2865 sizeof(packet->vector)) == 0)) {
2866 received_retransmit(request, client);
2871 * The new request is different from the old one,
2872 * but maybe the old is finished. If so, delete
2875 switch (request->child_state) {
2876 struct timeval when;
2880 * Special hacks for race conditions.
2881 * The reply is encoded, and therefore
2882 * likely sent. We received a *new*
2883 * packet from the client, likely before
2884 * the next line or two of code which
2885 * updated the child state. In this
2886 * case, just accept the new request.
2888 if ((request->reply->code != 0) &&
2889 request->reply->data) {
2890 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2892 packet->src_port, packet->id,
2894 remove_from_request_hash(request);
2899 gettimeofday(&when, NULL);
2903 * If the cached request was received
2904 * within the last second, then we
2905 * discard the NEW request instead of the
2906 * old one. This will happen ONLY when
2907 * the client is severely broken, and is
2908 * sending conflicting packets very
2911 if (timercmp(&when, &request->received, <)) {
2912 radlog(L_ERR, "Discarding conflicting packet from "
2913 "client %s port %d - ID: %d due to recent request %d.",
2915 packet->src_port, packet->id,
2920 received_conflicting_request(request, client);
2924 case REQUEST_REJECT_DELAY:
2925 case REQUEST_CLEANUP_DELAY:
2926 request->child_state = REQUEST_DONE;
2928 cleanup_delay(request);
2935 * We may want to quench the new request.
2937 if ((listener->type != RAD_LISTEN_DETAIL) &&
2938 !can_handle_new_request(packet, client, root)) {
2943 * Create and initialize the new request.
2945 request = request_alloc(); /* never fails */
2947 if ((request->reply = rad_alloc(0)) == NULL) {
2948 radlog(L_ERR, "No memory");
2952 request->listener = listener;
2953 request->client = client;
2954 request->packet = packet;
2955 request->packet->timestamp = request->timestamp;
2956 request->number = request_num_counter++;
2957 request->priority = listener->type;
2958 #ifdef HAVE_PTHREAD_H
2959 request->child_pid = NO_SUCH_CHILD_PID;
2963 * Status-Server packets go to the head of the queue.
2965 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2968 * Set virtual server identity
2970 if (client->server) {
2971 request->server = client->server;
2972 } else if (listener->server) {
2973 request->server = listener->server;
2975 request->server = NULL;
2979 * Remember the request in the list.
2981 if (!fr_packet_list_insert(pl, &request->packet)) {
2982 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2983 ev_request_free(&request);
2987 request->in_request_hash = TRUE;
2988 request->root = root;
2991 request->listener->count++;
2995 * The request passes many of our sanity checks.
2996 * From here on in, if anything goes wrong, we
2997 * send a reject message, instead of dropping the
3002 * Build the reply template from the request.
3005 request->reply->sockfd = request->packet->sockfd;
3006 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3007 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3008 request->reply->dst_port = request->packet->src_port;
3009 request->reply->src_port = request->packet->dst_port;
3010 request->reply->id = request->packet->id;
3011 request->reply->code = 0; /* UNKNOWN code */
3012 memcpy(request->reply->vector, request->packet->vector,
3013 sizeof(request->reply->vector));
3014 request->reply->vps = NULL;
3015 request->reply->data = NULL;
3016 request->reply->data_len = 0;
3018 request->master_state = REQUEST_ACTIVE;
3019 request->child_state = REQUEST_QUEUED;
3020 request->next_callback = NULL;
3022 gettimeofday(&request->received, NULL);
3023 request->timestamp = request->received.tv_sec;
3024 request->when = request->received;
3026 request->delay = USEC;
3028 tv_add(&request->when, request->delay);
3030 INSERT_EVENT(wait_a_bit, request);
3032 *prequest = request;
3038 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3044 * Also removes from the proxy hash if responses == requests
3046 request = lookup_in_proxy_hash(packet);
3049 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3050 inet_ntop(packet->src_ipaddr.af,
3051 &packet->src_ipaddr.ipaddr,
3052 buffer, sizeof(buffer)),
3053 packet->src_port, packet->id);
3058 * We haven't replied to the NAS, but we have seen an
3059 * earlier reply from the home server. Ignore this packet,
3060 * as we're likely still processing the previous reply.
3062 if (request->proxy_reply) {
3063 if (memcmp(request->proxy_reply->vector,
3065 sizeof(request->proxy_reply->vector)) == 0) {
3066 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
3067 inet_ntop(packet->src_ipaddr.af,
3068 &packet->src_ipaddr.ipaddr,
3069 buffer, sizeof(buffer)),
3070 packet->src_port, packet->id,
3074 * ? The home server gave us a new proxy
3075 * reply which doesn't match the old
3078 RDEBUG2("Ignoring conflicting proxy reply");
3081 /* assert that there's an event queued for request? */
3086 * Verify the packet before doing ANYTHING with it. This
3087 * means we're doing more MD5 checks in the server core.
3088 * However, we can fix that by moving to multiple threads
3089 * listening on sockets.
3091 * We do this AFTER looking the request up in the hash,
3092 * and AFTER vhecking if we saw a previous request. This
3093 * helps minimize the DoS effect of people attacking us
3094 * with spoofed packets.
3096 if (rad_verify(packet, request->proxy,
3097 request->home_server->secret) != 0) {
3098 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3102 gettimeofday(&now, NULL);
3105 * Maybe move this earlier in the decision process?
3106 * Having it here means that late or duplicate proxy
3107 * replies no longer get the home server marked as
3108 * "alive". This might be good for stability, though.
3110 * FIXME: Do we really want to do this whenever we
3111 * receive a packet? Setting this here means that we
3112 * mark it alive on *any* packet, even if it's lost all
3113 * of the *other* packets in the last 10s.
3115 if (request->proxy->code != PW_STATUS_SERVER) {
3116 request->home_server->state = HOME_STATE_ALIVE;
3121 * When originating CoA, the "proxy" reply is the reply
3122 * to the CoA request that we originated. At this point,
3123 * the original request is finished, and it has a reply.
3125 * However, if we haven't separated the two requests, do
3126 * so now. This is done so that cleaning up the original
3127 * request won't cause the CoA request to be free'd. See
3128 * util.c, request_free()
3130 if (request->parent && (request->parent->coa == request)) {
3131 request->parent->coa = NULL;
3132 request->parent = NULL;
3136 * Skip the next set of checks, as the original
3137 * reply is cached. We want to be able to still
3138 * process the CoA reply, AND to reference the
3139 * original request/reply.
3141 * This is getting to be really quite a bit of a
3147 * If there's a reply to the NAS, ignore everything
3148 * related to proxy responses
3150 if (request->reply && request->reply->code != 0) {
3151 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3157 * The average includes our time to receive packets and
3158 * look them up in the hashes, which should be the same
3161 * We update the response time only for the FIRST packet
3164 if (request->home_server->ema.window > 0) {
3165 radius_stats_ema(&request->home_server->ema,
3166 &now, &request->proxy_when);
3170 switch (request->child_state) {
3171 case REQUEST_QUEUED:
3172 case REQUEST_RUNNING:
3173 radlog(L_ERR, "Internal sanity check failed for child state");
3176 case REQUEST_REJECT_DELAY:
3177 case REQUEST_CLEANUP_DELAY:
3179 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'",
3180 inet_ntop(packet->src_ipaddr.af,
3181 &packet->src_ipaddr.ipaddr,
3182 buffer, sizeof(buffer)),
3183 packet->src_port, packet->id,
3185 /* assert that there's an event queued for request? */
3188 case REQUEST_PROXIED:
3192 request->proxy_reply = packet;
3196 * Perform RTT calculations, as per RFC 2988 (for TCP).
3197 * Note that we only do so on the first response.
3199 if ((request->num_proxied_responses == 1)
3201 home_server *home = request->home_server;
3203 rtt = now.tv_sec - request->proxy_when.tv_sec;
3206 rtt -= request->proxy_when.tv_usec;
3208 if (!home->has_rtt) {
3209 home->has_rtt = TRUE;
3212 home->rttvar = rtt / 2;
3215 home->rttvar -= home->rttvar >> 2;
3216 home->rttvar += (home->srtt - rtt);
3217 home->srtt -= home->srtt >> 3;
3218 home->srtt += rtt >> 3;
3221 home->rto = home->srtt;
3222 if (home->rttvar > (USEC / 4)) {
3223 home->rto += home->rttvar * 4;
3231 * There's no incoming request, so it's a proxied packet
3234 if (!request->packet) {
3235 received_response_to_ping(request);
3236 request->proxy_reply = NULL; /* caller will free it */
3237 ev_request_free(&request);
3241 request->child_state = REQUEST_QUEUED;
3242 request->when = now;
3243 request->delay = USEC;
3244 request->priority = RAD_LISTEN_PROXY;
3245 tv_add(&request->when, request->delay);
3248 * Wait a bit will take care of max_request_time
3250 INSERT_EVENT(wait_a_bit, request);
3255 #endif /* WITH_PROXY */
3258 static void tcp_socket_lifetime(void *ctx)
3260 rad_listen_t *listener = ctx;
3263 listener->print(listener, buffer, sizeof(buffer));
3265 DEBUG("Reached maximum lifetime on socket %s", buffer);
3267 listener->status = RAD_LISTEN_STATUS_CLOSED;
3268 event_new_fd(listener);
3271 static void tcp_socket_idle_timeout(void *ctx)
3273 rad_listen_t *listener = ctx;
3274 listen_socket_t *sock = listener->data;
3277 fr_event_now(el, &now); /* should always succeed... */
3279 rad_assert(sock->home != NULL);
3282 * We implement idle timeout by polling, because it's
3283 * cheaper than resetting the idle timeout every time
3284 * we send / receive a packet.
3286 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3287 struct timeval when;
3288 void *fun = tcp_socket_idle_timeout;
3290 when.tv_sec = sock->last_packet;
3291 when.tv_sec += sock->home->idle_timeout;
3294 if (sock->home->lifetime &&
3295 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3296 when.tv_sec = sock->opened + sock->home->lifetime;
3297 fun = tcp_socket_lifetime;
3300 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3301 rad_panic("Failed to insert event");
3307 listener->print(listener, buffer, sizeof(buffer));
3309 DEBUG("Reached idle timeout on socket %s", buffer);
3311 listener->status = RAD_LISTEN_STATUS_CLOSED;
3312 event_new_fd(listener);
3316 void event_new_fd(rad_listen_t *this)
3320 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3322 this->print(this, buffer, sizeof(buffer));
3324 if (this->status == RAD_LISTEN_STATUS_INIT) {
3326 DEBUG("Listening on %s", buffer);
3328 radlog(L_INFO, " ... adding new socket %s", buffer);
3333 * Add it to the list of sockets we can use.
3334 * Server sockets (i.e. auth/acct) are never
3335 * added to the packet list.
3337 if (this->type == RAD_LISTEN_PROXY) {
3338 listen_socket_t *sock = this->data;
3340 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3341 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3343 &sock->other_ipaddr, sock->other_port,
3345 radlog(L_ERR, "Fatal error adding socket: %s",
3352 sock->home->num_connections++;
3355 * If necessary, add it to the list of
3356 * new proxy listeners.
3358 if (sock->home->lifetime || sock->home->idle_timeout) {
3359 this->next = proxy_listener_list;
3360 proxy_listener_list = this;
3363 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3366 * Tell the main thread that we've added
3367 * a proxy listener, but only if we need
3368 * to update the event list. Do this
3369 * with the mutex unlocked, to reduce
3373 if (sock->home->lifetime || sock->home->idle_timeout) {
3374 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3382 * Detail files are always known, and aren't
3383 * put into the socket event loop.
3385 if (this->type == RAD_LISTEN_DETAIL) {
3386 this->status = RAD_LISTEN_STATUS_KNOWN;
3389 * Set up the first poll interval.
3391 event_poll_detail(this);
3396 FD_MUTEX_LOCK(&fd_mutex);
3397 if (!fr_event_fd_insert(el, 0, this->fd,
3398 event_socket_handler, this)) {
3399 radlog(L_ERR, "Failed remembering handle for proxy socket!");
3402 FD_MUTEX_UNLOCK(&fd_mutex);
3404 this->status = RAD_LISTEN_STATUS_KNOWN;
3409 * Something went wrong with the socket: make it harmless.
3411 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3415 * Remove it from the list of live FD's.
3417 FD_MUTEX_LOCK(&fd_mutex);
3418 fr_event_fd_delete(el, 0, this->fd);
3419 FD_MUTEX_UNLOCK(&fd_mutex);
3422 if (this->type != RAD_LISTEN_PROXY)
3425 if (this->count != 0) {
3426 fr_packet_list_walk(pl, this,
3427 remove_all_requests);
3430 if (this->count == 0) {
3431 this->status = RAD_LISTEN_STATUS_FINISH;
3437 int count = this->count;
3442 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3443 if (!fr_packet_list_socket_freeze(proxy_list,
3445 radlog(L_ERR, "Fatal error freezing socket: %s",
3451 * Doing this with the proxy mutex held
3452 * is a Bad Thing. We should move to
3453 * finer-grained mutexes.
3455 count = this->count;
3457 fr_packet_list_walk(proxy_list, this,
3458 remove_all_proxied_requests);
3460 count = this->count; /* protected by mutex */
3461 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3464 this->status = RAD_LISTEN_STATUS_FINISH;
3471 * Re-open the socket, pointing it to /dev/null.
3472 * This means that all writes proceed without
3473 * blocking, and all reads return "no data".
3475 * This leaves the socket active, so any child
3476 * threads won't go insane. But it means that
3477 * they cannot send or receive any packets.
3479 * This is EXTRA work in the normal case, when
3480 * sockets are closed without error. But it lets
3481 * us have one simple processing method for all
3484 devnull = open("/dev/null", O_RDWR);
3486 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3490 if (dup2(devnull, this->fd) < 0) {
3491 radlog(L_ERR, "FATAL failure closing socket: %s",
3497 this->status = RAD_LISTEN_STATUS_CLOSED;
3500 * Fall through to the next section.
3505 * Called ONLY from the main thread. On the following
3511 * (and falling through from "forcibly close FD" above)
3512 * client closed connection on us
3513 * client sent us a bad packet.
3515 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3516 int count = this->count;
3517 rad_assert(this->type != RAD_LISTEN_DETAIL);
3521 * Remove it from the list of active sockets, so
3522 * that it isn't used when proxying new packets.
3524 if (this->type == RAD_LISTEN_PROXY) {
3525 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3526 if (!fr_packet_list_socket_freeze(proxy_list,
3528 radlog(L_ERR, "Fatal error freezing socket: %s",
3532 count = this->count; /* protected by mutex */
3533 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3538 * Requests are still using the socket. Wait for
3542 struct timeval when;
3543 listen_socket_t *sock = this->data;
3546 * Try again to clean up the socket in 30
3549 gettimeofday(&when, NULL);
3552 if (!fr_event_insert(el,
3553 (fr_event_callback_t) event_new_fd,
3554 this, &when, &sock->ev)) {
3555 rad_panic("Failed to insert event");
3562 * No one is using this socket: we can delete it
3565 this->status = RAD_LISTEN_STATUS_FINISH;
3569 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3570 listen_socket_t *sock = this->data;
3572 rad_assert(this->count == 0);
3573 radlog(L_INFO, " ... closing socket %s", buffer);
3576 * Remove it from the list of live FD's. Note
3577 * that it MAY also have been removed above. We
3578 * do it again here, to catch the case of sockets
3579 * closing on idle timeout, or max
3580 * lifetime... AFTER all requests have finished
3583 FD_MUTEX_LOCK(&fd_mutex);
3584 fr_event_fd_delete(el, 0, this->fd);
3585 FD_MUTEX_UNLOCK(&fd_mutex);
3589 * Remove it from the list of sockets to be used
3592 if (this->type == RAD_LISTEN_PROXY) {
3593 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3594 if (!fr_packet_list_socket_remove(proxy_list,
3596 radlog(L_ERR, "Fatal error removing socket: %s",
3600 if (sock->home) sock->home->num_connections--;
3601 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3606 * Remove any pending cleanups.
3608 if (sock->ev) fr_event_delete(el, &sock->ev);
3611 * And finally, close the socket.
3617 static void handle_signal_self(int flag)
3619 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3620 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3621 radlog(L_INFO, "Received TERM signal");
3622 fr_event_loop_exit(el, 1);
3624 fr_event_loop_exit(el, 2);
3628 } /* else exit/term flags weren't set */
3631 * Tell the even loop to stop processing.
3633 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3635 static time_t last_hup = 0;
3637 radlog(L_INFO, "Received HUP signal.");
3640 if ((int) (when - last_hup) < 5) {
3641 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3646 fr_event_loop_exit(el, 0x80);
3650 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3654 * FIXME: O(N) loops suck.
3656 for (this = mainconfig.listen;
3658 this = this->next) {
3659 if (this->type != RAD_LISTEN_DETAIL) continue;
3662 * This one didn't send the signal, skip
3665 if (!this->decode(this, NULL)) continue;
3668 * Go service the interrupt.
3670 event_poll_detail(this);
3677 * Add event handlers for idle timeouts && maximum lifetime.
3679 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3680 struct timeval when;
3683 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3685 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3687 while (proxy_listener_list) {
3688 rad_listen_t *this = proxy_listener_list;
3689 listen_socket_t *sock = this->data;
3691 proxy_listener_list = this->next;
3694 if (!sock->home) continue; /* skip UDP sockets */
3698 if (!sock->home->idle_timeout) {
3699 rad_assert(sock->home->lifetime != 0);
3701 when.tv_sec += sock->home->lifetime;
3702 fun = tcp_socket_lifetime;
3704 rad_assert(sock->home->idle_timeout != 0);
3706 when.tv_sec += sock->home->idle_timeout;
3707 fun = tcp_socket_idle_timeout;
3710 if (!fr_event_insert(el, fun, this, &when,
3712 rad_panic("Failed to insert event");
3716 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3721 #ifndef WITH_SELF_PIPE
3722 void radius_signal_self(int flag)
3724 handle_signal_self(flag);
3728 * Inform ourselves that we received a signal.
3730 void radius_signal_self(int flag)
3736 * The read MUST be non-blocking for this to work.
3738 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3742 for (i = 0; i < rcode; i++) {
3743 buffer[0] |= buffer[i];
3751 write(self_pipe[1], buffer, 1);
3755 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3756 UNUSED int fd, UNUSED void *ctx)
3761 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3762 if (rcode <= 0) return;
3765 * Merge pending signals.
3767 for (i = 0; i < rcode; i++) {
3768 buffer[0] |= buffer[i];
3771 handle_signal_self(buffer[0]);
3776 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3779 rad_listen_t *listener = ctx;
3780 RAD_REQUEST_FUNP fun;
3783 rad_assert(xel == el);
3787 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3789 if (!listener->recv(listener, &fun, &request)) return;
3791 if (!thread_pool_addrequest(request, fun)) {
3792 request->child_state = REQUEST_DONE;
3796 typedef struct listen_detail_t {
3801 * This function is called periodically to see if this detail
3802 * file is available for reading.
3804 static void event_poll_detail(void *ctx)
3807 RAD_REQUEST_FUNP fun;
3809 rad_listen_t *this = ctx;
3810 struct timeval when;
3811 listen_detail_t *detail = this->data;
3813 rad_assert(this->type == RAD_LISTEN_DETAIL);
3816 * Try to read something.
3818 * FIXME: This does poll AND receive.
3820 rcode = this->recv(this, &fun, &request);
3822 rad_assert(fun != NULL);
3823 rad_assert(request != NULL);
3825 if (!thread_pool_addrequest(request, fun)) {
3826 request->child_state = REQUEST_DONE;
3830 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3834 * Backdoor API to get the delay until the next poll
3837 delay = this->encode(this, NULL);
3838 tv_add(&when, delay);
3840 if (!fr_event_insert(el, event_poll_detail, this,
3841 &when, &detail->ev)) {
3842 radlog(L_ERR, "Failed creating handler");
3848 static void event_status(struct timeval *wake)
3850 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3854 if (debug_flag == 0) {
3856 radlog(L_INFO, "Ready to process requests.");
3857 just_started = FALSE;
3863 radlog(L_INFO, "Ready to process requests.");
3865 } else if ((wake->tv_sec != 0) ||
3866 (wake->tv_usec >= 100000)) {
3867 DEBUG("Waking up in %d.%01u seconds.",
3868 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3873 * FIXME: Put this somewhere else, where it isn't called
3874 * all of the time...
3877 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3879 * If there are no child threads, then there may
3880 * be child processes. In that case, wait for
3881 * their exit status, and throw that exit status
3882 * away. This helps get rid of zxombie children.
3884 while (waitpid(-1, &argval, WNOHANG) > 0) {
3892 * Externally-visibly functions.
3894 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3896 rad_listen_t *head = NULL;
3900 time(&fr_start_time);
3902 el = fr_event_list_create(event_status);
3905 pl = fr_packet_list_create(0);
3906 if (!pl) return 0; /* leak el */
3908 request_num_counter = 0;
3911 if (mainconfig.proxy_requests) {
3913 * Create the tree for managing proxied requests and
3916 proxy_list = fr_packet_list_create(1);
3917 if (!proxy_list) return 0;
3919 #ifdef HAVE_PTHREAD_H
3920 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3921 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3930 * Just before we spawn the child threads, force the log
3931 * subsystem to re-open the log file for every write.
3933 if (spawn_flag) force_log_reopen();
3935 #ifdef HAVE_PTHREAD_H
3937 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3939 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3942 * Initialize the threads ONLY if we're spawning, AND
3943 * we're running normally.
3945 if (spawn_flag && !check_config &&
3946 (thread_pool_init(cs, &spawn_flag) < 0)) {
3952 * Move all of the thread calls to this file?
3954 * It may be best for the mutexes to be in this file...
3956 have_children = spawn_flag;
3959 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3964 #ifdef WITH_SELF_PIPE
3966 * Child threads need a pipe to signal us, as do the
3969 if (pipe(self_pipe) < 0) {
3970 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3974 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3975 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3979 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3980 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3985 if (!fr_event_fd_insert(el, 0, self_pipe[0],
3986 event_signal_handler, el)) {
3987 radlog(L_ERR, "Failed creating handler for signals");
3990 #endif /* WITH_SELF_PIPE */
3992 DEBUG("%s: #### Opening IP addresses and Ports ####",
3996 * The server temporarily switches to an unprivileged
3997 * user very early in the bootstrapping process.
3998 * However, some sockets MAY require privileged access
3999 * (bind to device, or to port < 1024, or to raw
4000 * sockets). Those sockets need to call suid up/down
4001 * themselves around the functions that need a privileged
4004 if (listen_init(cs, &head) < 0) {
4008 mainconfig.listen = head;
4011 * At this point, no one has any business *ever* going
4014 fr_suid_down_permanent();
4020 static int request_hash_cb(UNUSED void *ctx, void *data)
4022 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4025 rad_assert(request->in_proxy_hash == FALSE);
4028 ev_request_free(&request);
4035 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4037 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4039 ev_request_free(&request);
4045 void radius_event_free(void)
4048 * FIXME: Stop all threads, or at least check that
4049 * they're all waiting on the semaphore, and the queues
4055 * There are requests in the proxy hash that aren't
4056 * referenced from anywhere else. Remove them first.
4059 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4060 fr_packet_list_free(proxy_list);
4065 fr_packet_list_walk(pl, NULL, request_hash_cb);
4067 fr_packet_list_free(pl);
4070 fr_event_list_free(el);
4073 int radius_event_process(void)
4077 return fr_event_loop(el);
4080 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4082 request->options = RAD_REQUEST_OPTION_DEBUG2;
4084 if (request_pre_handler(request)) {
4085 rad_assert(fun != NULL);
4086 rad_assert(request != NULL);
4088 if (request->server) RDEBUG("server %s {",
4089 request->server != NULL ?
4090 request->server : "");
4093 if (request->server) RDEBUG("} # server %s",
4094 request->server != NULL ?
4095 request->server : "");
4097 request_post_handler(request);
4100 DEBUG2("Going to the next request");