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 fr_event_now(el, &now);
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 request->when.tv_sec += home->ping_timeout;;
832 INSERT_EVENT(no_response_to_ping, request);
835 * Add +/- 2s of jitter, as suggested in RFC 3539
836 * and in the Issues and Fixes draft.
838 home->when.tv_sec += home->ping_interval - 2;
841 jitter ^= (jitter >> 10);
842 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
844 tv_add(&home->when, jitter);
846 INSERT_EVENT(ping_home_server, home);
850 void mark_home_server_dead(home_server *home, struct timeval *when)
852 int previous_state = home->state;
855 radlog(L_PROXY, "Marking home server %s port %d as dead.",
856 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
857 buffer, sizeof(buffer)),
860 home->state = HOME_STATE_IS_DEAD;
861 home->num_received_pings = 0;
863 if (home->ping_check != HOME_PING_CHECK_NONE) {
865 * If the control socket marks us dead, start
866 * pinging. Otherwise, we already started
867 * pinging when it was marked "zombie".
869 if (previous_state == HOME_STATE_ALIVE) {
870 ping_home_server(home);
875 * Revive it after a fixed period of time. This
876 * is very, very, bad.
879 home->when.tv_sec += home->revive_interval;
881 INSERT_EVENT(revive_home_server, home);
885 static void check_for_zombie_home_server(REQUEST *request)
890 home = request->home_server;
892 if (home->state != HOME_STATE_ZOMBIE) return;
894 when = home->zombie_period_start;
895 when.tv_sec += home->zombie_period;
897 fr_event_now(el, &now);
898 if (timercmp(&now, &when, <)) {
902 mark_home_server_dead(home, &request->when);
905 static int proxy_to_virtual_server(REQUEST *request);
907 static int virtual_server_handler(UNUSED REQUEST *request)
909 proxy_to_virtual_server(request);
913 static void proxy_fallback_handler(REQUEST *request)
916 * A proper time is required for wait_a_bit.
918 request->delay = USEC / 10;
919 gettimeofday(&now, NULL);
920 request->next_when = now;
921 tv_add(&request->next_when, request->delay);
922 request->next_callback = wait_a_bit;
925 * Re-queue the request.
927 request->child_state = REQUEST_QUEUED;
929 rad_assert(request->proxy != NULL);
930 if (!thread_pool_addrequest(request, virtual_server_handler)) {
931 request->child_state = REQUEST_DONE;
934 #ifdef HAVE_PTHREAD_H
936 * MAY free the request if we're over max_request_time,
937 * AND we're not in threaded mode!
939 * Note that we call this ONLY if we're threaded, as
940 * if we're NOT threaded, request_post_handler() calls
941 * wait_a_bit(), which means that "request" may not
944 if (have_children) wait_a_bit(request);
949 static int setup_post_proxy_fail(REQUEST *request)
951 DICT_VALUE *dval = NULL;
954 request->child_state = REQUEST_RUNNING;
956 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
957 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
959 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
960 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
964 * See no_response_to_coa_request
966 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
967 request->packet->code &= 0xff; /* restore it */
969 if (request->proxy->code == PW_COA_REQUEST) {
970 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
972 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
973 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
983 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
986 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
990 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
991 if (!vp) vp = radius_paircreate(request, &request->config_items,
992 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
993 vp->vp_integer = dval->value;
995 rad_assert(request->proxy_reply == NULL);
1001 static int null_handler(UNUSED REQUEST *request)
1006 static void post_proxy_fail_handler(REQUEST *request)
1009 * A proper time is required for wait_a_bit.
1011 request->delay = USEC / 10;
1012 gettimeofday(&now, NULL);
1015 * Not set up to run Post-Proxy-Type = Fail.
1017 * Mark the request as still running, and figure out what
1020 if (!setup_post_proxy_fail(request)) {
1021 request_post_handler(request);
1025 * Re-queue the request.
1027 request->child_state = REQUEST_QUEUED;
1030 * There is a post-proxy-type of fail. We run
1031 * the request through the pre/post proxy
1032 * handlers, just like it was a real proxied
1033 * request. However, we set the per-request
1034 * handler to NULL, as we don't want to do
1037 * Note that when we're not threaded, this will
1038 * process the request even if it's greater than
1039 * max_request_time. That's not fatal.
1041 request->priority = 0;
1042 rad_assert(request->proxy != NULL);
1043 thread_pool_addrequest(request, null_handler);
1047 * MAY free the request if we're over max_request_time,
1048 * AND we're not in threaded mode!
1050 * Note that we call this ONLY if we're threaded, as
1051 * if we're NOT threaded, request_post_handler() calls
1052 * wait_a_bit(), which means that "request" may not
1055 if (have_children) wait_a_bit(request);
1058 /* maybe check this against wait_for_proxy_id_to_expire? */
1059 static void no_response_to_proxied_request(void *ctx)
1061 REQUEST *request = ctx;
1065 rad_assert(request->magic == REQUEST_MAGIC);
1067 if (request->master_state == REQUEST_STOP_PROCESSING) {
1068 ev_request_free(&request);
1072 rad_assert(request->child_state == REQUEST_PROXIED);
1075 * If we've failed over to an internal home server,
1076 * replace the callback with the correct one. This
1077 * is due to locking issues with child threads...
1079 if (request->home_server->server) {
1080 wait_a_bit(request);
1085 if (request->home_server->proto != IPPROTO_TCP)
1087 check_for_zombie_home_server(request);
1089 home = request->home_server;
1092 * The default as of 2.1.7 is to allow requests to
1093 * fail-over to a backup home server when this one does
1094 * not respond. The old behavior can be configured as
1097 if (home->no_response_fail) {
1098 radlog(L_ERR, "Rejecting request %d (proxy Id %d) due to lack of any response from home server %s port %d",
1099 request->number, request->proxy->id,
1100 inet_ntop(request->proxy->dst_ipaddr.af,
1101 &request->proxy->dst_ipaddr.ipaddr,
1102 buffer, sizeof(buffer)),
1103 request->proxy->dst_port);
1105 post_proxy_fail_handler(request);
1108 * Enforce max_request_time.
1110 * We fail over to another backup home server
1111 * when the client re-transmits the request. If
1112 * the client doesn't re-transmit, no fail-over
1115 rad_assert(request->ev == NULL);
1116 request->child_state = REQUEST_RUNNING;
1117 wait_a_bit(request);
1121 * Don't touch request due to race conditions
1126 * Do nothing more. The home server didn't respond,
1127 * but that isn't a catastrophic failure. Some home
1128 * servers don't respond to packets...
1130 if (home->proto == IPPROTO_TCP) {
1132 * FIXME: Set up TCP pinging on this connection.
1134 * Maybe the CONNECTION is dead, but the home
1135 * server is alive. In that case, we need to start
1136 * pinging on the connection.
1138 * This means doing the pinging BEFORE the
1139 * post_proxy_fail_handler above, as it may do
1140 * something with the request, and cause the
1141 * proxy listener to go away!
1147 if (home->state == HOME_STATE_IS_DEAD) {
1148 rad_assert(home->ev != NULL); /* or it will never wake up */
1153 * Enable the zombie period when we notice that the home
1154 * server hasn't responded. We do NOT back-date the start
1155 * of the zombie period.
1157 if (home->state == HOME_STATE_ALIVE) {
1158 home->state = HOME_STATE_ZOMBIE;
1159 home->zombie_period_start = now;
1161 radlog(L_PROXY, "Marking home server %s port %d as zombie (it looks like it is dead).",
1162 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1163 buffer, sizeof(buffer)),
1167 * Start pinging the home server.
1169 ping_home_server(home);
1174 static void wait_a_bit(void *ctx)
1176 struct timeval when;
1177 REQUEST *request = ctx;
1178 fr_event_callback_t callback = NULL;
1180 rad_assert(request->magic == REQUEST_MAGIC);
1183 * The socket was closed. Tell the request that
1184 * there is no point in continuing.
1186 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1187 goto stop_processing;
1192 * The CoA request is a new (internally generated)
1193 * request, created in a child thread. We therefore need
1194 * some way to tie its events back into the main event
1197 if (request->coa && !request->coa->proxy_reply &&
1198 request->coa->next_callback) {
1199 request->coa->when = request->coa->next_when;
1200 INSERT_EVENT(request->coa->next_callback, request->coa);
1201 request->coa->next_callback = NULL;
1202 request->coa->parent = NULL;
1203 request->coa = NULL;
1207 switch (request->child_state) {
1208 case REQUEST_QUEUED:
1209 case REQUEST_RUNNING:
1210 when = request->received;
1211 when.tv_sec += request->root->max_request_time;
1214 * Normally called from the event loop with the
1215 * proper event loop time. Otherwise, called from
1216 * post proxy fail handler, which sets "now", and
1217 * this call won't re-set it, because we're not
1218 * in the event loop.
1220 fr_event_now(el, &now);
1223 * Request still has more time. Continue
1226 if (timercmp(&now, &when, <) ||
1227 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1228 (request->child_state == REQUEST_QUEUED))) {
1229 if (request->delay < (USEC / 10)) {
1230 request->delay = USEC / 10;
1232 request->delay += request->delay >> 1;
1236 * Cap wait at some sane value for detail
1239 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1240 (request->delay > (request->root->max_request_time * USEC))) {
1241 request->delay = request->root->max_request_time * USEC;
1245 request->when = now;
1246 tv_add(&request->when, request->delay);
1247 callback = wait_a_bit;
1252 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1254 * A child thread MAY still be running on the
1255 * request. Ask the thread to stop working on
1258 if (have_children &&
1259 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1260 request->master_state = REQUEST_STOP_PROCESSING;
1262 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1264 request->module ? request->module : "<server core>",
1265 request->component ? request->component : "<server core>");
1267 request->delay = USEC / 4;
1268 tv_add(&request->when, request->delay);
1269 callback = wait_for_child_to_die;
1275 * Else no child thread is processing the
1276 * request. We probably should have just marked
1277 * the request as 'done' elsewhere, like in the
1278 * post-proxy-fail handler. But doing that would
1279 * involve checking for max_request_time in
1280 * multiple places, so this may be simplest.
1282 request->child_state = REQUEST_DONE;
1286 * Mark the request as no longer running,
1290 #ifdef HAVE_PTHREAD_H
1291 request->child_pid = NO_SUCH_CHILD_PID;
1296 * This is a CoA request. It's been divorced
1297 * from everything else, so we clean it up now.
1299 if (!request->in_request_hash &&
1301 (request->packet->code != request->proxy->code) &&
1302 ((request->proxy->code == PW_COA_REQUEST) ||
1303 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1305 * FIXME: Do CoA MIBs
1307 ev_request_free(&request);
1311 request_stats_final(request);
1312 cleanup_delay(request);
1315 case REQUEST_REJECT_DELAY:
1316 case REQUEST_CLEANUP_DELAY:
1317 #ifdef HAVE_PTHREAD_H
1318 request->child_pid = NO_SUCH_CHILD_PID;
1320 request_stats_final(request);
1322 case REQUEST_PROXIED:
1323 rad_assert(request->next_callback != NULL);
1324 rad_assert(request->next_callback != wait_a_bit);
1326 request->when = request->next_when;
1327 callback = request->next_callback;
1328 request->next_callback = NULL;
1332 rad_panic("Internal sanity check failure");
1337 * Something major went wrong. Discard the request, and
1340 * FIXME: No idea why this happens or how to fix it...
1341 * It seems to happen *only* when requests are proxied,
1342 * and where the home server doesn't respond. So it looks
1343 * like a race condition above, but it happens in debug
1344 * mode, with no threads...
1347 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1348 ev_request_free(&request);
1352 INSERT_EVENT(callback, request);
1356 static void no_response_to_coa_request(void *ctx)
1358 REQUEST *request = ctx;
1361 rad_assert(request->magic == REQUEST_MAGIC);
1362 rad_assert(request->child_state == REQUEST_PROXIED);
1363 rad_assert(request->home_server != NULL);
1364 rad_assert(!request->in_request_hash);
1366 radlog(L_ERR, "No response to CoA request sent to %s",
1367 inet_ntop(request->proxy->dst_ipaddr.af,
1368 &request->proxy->dst_ipaddr.ipaddr,
1369 buffer, sizeof(buffer)));
1374 request->packet->code |= (PW_COA_REQUEST << 8);
1375 post_proxy_fail_handler(request);
1379 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1383 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1390 packet->data = NULL;
1391 packet->data_len = 0;
1394 return 1; /* time stamp updated */
1399 * Called when we haven't received a response to a CoA request.
1401 static void retransmit_coa_request(void *ctx)
1405 REQUEST *request = ctx;
1407 rad_assert(request->magic == REQUEST_MAGIC);
1408 rad_assert(request->child_state == REQUEST_PROXIED);
1409 rad_assert(request->home_server != NULL);
1410 rad_assert(!request->in_request_hash);
1411 rad_assert(request->parent == NULL);
1413 fr_event_now(el, &now);
1416 * Cap count at MRC, if it is non-zero.
1418 if (request->home_server->coa_mrc &&
1419 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1420 no_response_to_coa_request(request);
1425 * RFC 5080 Section 2.2.1
1427 * RT = 2*RTprev + RAND*RTprev
1428 * = 1.9 * RTprev + rand(0,.2) * RTprev
1429 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1432 delay ^= (delay >> 16);
1434 frac = request->delay / 5;
1435 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1437 delay += (2 * request->delay) - (request->delay / 10);
1440 * Cap delay at MRT, if MRT is non-zero.
1442 if (request->home_server->coa_mrt &&
1443 (delay > (request->home_server->coa_mrt * USEC))) {
1444 int mrt_usec = request->home_server->coa_mrt * USEC;
1447 * delay = MRT + RAND * MRT
1448 * = 0.9 MRT + rand(0,.2) * MRT
1451 delay ^= (delay >> 15);
1453 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1454 delay += mrt_usec - (mrt_usec / 10);
1457 request->delay = delay;
1458 request->when = now;
1459 tv_add(&request->when, request->delay);
1460 mrd = request->proxy_when;
1461 mrd.tv_sec += request->home_server->coa_mrd;
1464 * Cap duration at MRD.
1466 if (timercmp(&mrd, &request->when, <)) {
1467 request->when = mrd;
1468 INSERT_EVENT(no_response_to_coa_request, request);
1471 INSERT_EVENT(retransmit_coa_request, request);
1474 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1476 * Keep a copy of the old Id so that the
1477 * re-transmitted request doesn't re-use the old
1480 RADIUS_PACKET old = *request->proxy;
1483 * Don't free the old Id on error.
1485 if (!insert_into_proxy_hash(request)) {
1486 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1491 * Now that we have a new Id, free the old one.
1493 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1494 fr_packet_list_yank(proxy_list, &old);
1495 fr_packet_list_id_free(proxy_list, &old);
1496 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1498 request->num_proxied_requests = 0;
1499 request->num_proxied_responses = 0;
1502 request->num_proxied_requests++;
1503 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1505 request->proxy_listener->send(request->proxy_listener,
1511 * The original request is either DONE, or in CLEANUP_DELAY.
1513 static int originated_coa_request(REQUEST *request)
1515 int delay, rcode, pre_proxy_type = 0;
1521 rad_assert(request->proxy == NULL);
1522 rad_assert(!request->in_proxy_hash);
1523 rad_assert(request->proxy_reply == NULL);
1525 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1526 if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1528 if (vp->vp_integer == 0) {
1529 ev_request_free(&request->coa);
1530 return 1; /* success */
1533 if (!request->coa) request_alloc_coa(request);
1534 if (!request->coa) return 0;
1540 * src_ipaddr will be set up in proxy_encode.
1542 memset(&ipaddr, 0, sizeof(ipaddr));
1543 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1545 ipaddr.af = AF_INET;
1546 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1548 } else if ((vp = pairfind(coa->proxy->vps,
1549 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1550 ipaddr.af = AF_INET6;
1551 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1553 } else if ((vp = pairfind(coa->proxy->vps,
1554 PW_HOME_SERVER_POOL)) != NULL) {
1555 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1557 if (!coa->home_pool) {
1558 RDEBUG2("WARNING: No such home_server_pool %s",
1561 ev_request_free(&request->coa);
1568 } else if (request->client->coa_pool) {
1569 coa->home_pool = request->client->coa_pool;
1571 } else if (request->client->coa_server) {
1572 coa->home_server = request->client->coa_server;
1576 * If all else fails, send it to the client that
1577 * originated this request.
1579 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1583 * Use the pool, if it exists.
1585 if (coa->home_pool) {
1586 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1587 if (!coa->home_server) {
1588 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1592 } else if (!coa->home_server) {
1593 int port = PW_COA_UDP_PORT;
1595 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1596 if (vp) port = vp->vp_integer;
1598 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1599 if (!coa->home_server) {
1600 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1601 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1602 buffer, sizeof(buffer)), port);
1607 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1609 switch (vp->vp_integer) {
1610 case PW_COA_REQUEST:
1611 case PW_DISCONNECT_REQUEST:
1612 coa->proxy->code = vp->vp_integer;
1616 DEBUG("Cannot set CoA Packet-Type to code %d",
1622 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1625 * The rest of the server code assumes that
1626 * request->packet && request->reply exist. Copy them
1627 * from the original request.
1629 rad_assert(coa->packet != NULL);
1630 rad_assert(coa->packet->vps == NULL);
1631 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1632 coa->packet->vps = paircopy(request->packet->vps);
1633 coa->packet->data = NULL;
1634 rad_assert(coa->reply != NULL);
1635 rad_assert(coa->reply->vps == NULL);
1636 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1637 coa->reply->vps = paircopy(request->reply->vps);
1638 coa->reply->data = NULL;
1639 coa->config_items = paircopy(request->config_items);
1642 * Call the pre-proxy routines.
1644 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1646 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1647 pre_proxy_type = vp->vp_integer;
1650 if (coa->home_pool && coa->home_pool->virtual_server) {
1651 const char *old_server = coa->server;
1653 coa->server = coa->home_pool->virtual_server;
1654 RDEBUG2(" server %s {", coa->server);
1655 rcode = module_pre_proxy(pre_proxy_type, coa);
1657 coa->server = old_server;
1659 rcode = module_pre_proxy(pre_proxy_type, coa);
1666 * Only send the CoA packet if the pre-proxy code succeeded.
1668 case RLM_MODULE_NOOP:
1670 case RLM_MODULE_UPDATED:
1675 * Source IP / port is set when the proxy socket
1678 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1679 coa->proxy->dst_port = coa->home_server->port;
1681 if (!insert_into_proxy_hash(coa)) {
1682 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1687 * We CANNOT divorce the CoA request from the parent
1688 * request. This function is running in a child thread,
1689 * and we need access to the main event loop in order to
1690 * to add the timers for the CoA packet. See
1695 * Forget about the original request completely at this
1700 gettimeofday(&request->proxy_when, NULL);
1701 request->received = request->next_when = request->proxy_when;
1702 rad_assert(request->proxy_reply == NULL);
1705 * Implement re-transmit algorithm as per RFC 5080
1708 * We want IRT + RAND*IRT
1709 * or 0.9 IRT + rand(0,.2) IRT
1711 * 2^20 ~ USEC, and we want 2.
1712 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1714 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1715 request->delay = delay * request->home_server->coa_irt;
1716 delay = request->home_server->coa_irt * USEC;
1717 delay -= delay / 10;
1718 delay += request->delay;
1720 request->delay = delay;
1721 tv_add(&request->next_when, delay);
1722 request->next_callback = retransmit_coa_request;
1725 * Note that we set proxied BEFORE sending the packet.
1727 * Once we send it, the request is tainted, as
1728 * another thread may have picked it up. Don't
1731 request->num_proxied_requests = 1;
1732 request->num_proxied_responses = 0;
1733 request->child_pid = NO_SUCH_CHILD_PID;
1735 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1737 request->child_state = REQUEST_PROXIED;
1739 DEBUG_PACKET(request, request->proxy, 1);
1741 request->proxy_listener->send(request->proxy_listener,
1745 #endif /* WITH_COA */
1748 static int process_proxy_reply(REQUEST *request)
1751 int post_proxy_type = 0;
1755 * Delete any reply we had accumulated until now.
1757 pairfree(&request->reply->vps);
1760 * Run the packet through the post-proxy stage,
1761 * BEFORE playing games with the attributes.
1763 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1765 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1766 post_proxy_type = vp->vp_integer;
1769 if (request->home_pool && request->home_pool->virtual_server) {
1770 const char *old_server = request->server;
1772 request->server = request->home_pool->virtual_server;
1773 RDEBUG2(" server %s {", request->server);
1774 rcode = module_post_proxy(post_proxy_type, request);
1776 request->server = old_server;
1778 rcode = module_post_proxy(post_proxy_type, request);
1782 if (request->packet->code == request->proxy->code)
1784 * Don't run the next bit if we originated a CoA
1785 * packet, after receiving an Access-Request or
1786 * Accounting-Request.
1791 * There may NOT be a proxy reply, as we may be
1792 * running Post-Proxy-Type = Fail.
1794 if (request->proxy_reply) {
1796 * Delete the Proxy-State Attributes from
1797 * the reply. These include Proxy-State
1798 * attributes from us and remote server.
1800 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1803 * Add the attributes left in the proxy
1804 * reply to the reply list.
1806 pairadd(&request->reply->vps, request->proxy_reply->vps);
1807 request->proxy_reply->vps = NULL;
1810 * Free proxy request pairs.
1812 pairfree(&request->proxy->vps);
1816 default: /* Don't do anything */
1818 case RLM_MODULE_FAIL:
1819 /* FIXME: debug print stuff */
1820 request->child_state = REQUEST_DONE;
1823 case RLM_MODULE_HANDLED:
1824 /* FIXME: debug print stuff */
1825 request->child_state = REQUEST_DONE;
1833 static int request_pre_handler(REQUEST *request)
1837 rad_assert(request->magic == REQUEST_MAGIC);
1838 rad_assert(request->packet != NULL);
1840 request->child_state = REQUEST_RUNNING;
1843 * Don't decode the packet if it's an internal "fake"
1844 * request. Instead, just return so that the caller can
1847 if (request->packet->dst_port == 0) {
1848 request->username = pairfind(request->packet->vps,
1850 request->password = pairfind(request->packet->vps,
1857 * Put the decoded packet into it's proper place.
1859 if (request->proxy_reply != NULL) {
1861 * FIXME: For now, we can only proxy RADIUS packets.
1863 * In order to proxy other packets, we need to
1864 * somehow cache the "decode" function.
1866 rcode = rad_decode(request->proxy_reply, request->proxy,
1867 request->home_server->secret);
1868 DEBUG_PACKET(request, request->proxy_reply, 0);
1871 if (request->packet->vps == NULL) {
1872 rcode = request->listener->decode(request->listener, request);
1874 if (debug_condition) {
1876 const char *my_debug = debug_condition;
1879 * Ignore parse errors.
1881 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1885 request->options = 2;
1886 request->radlog = radlog_request;
1890 DEBUG_PACKET(request, request->packet, 0);
1896 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1897 request->child_state = REQUEST_DONE;
1901 if (!request->username) {
1902 request->username = pairfind(request->packet->vps,
1907 if (request->proxy) {
1908 return process_proxy_reply(request);
1918 * Do state handling when we proxy a request.
1920 static int proxy_request(REQUEST *request)
1922 struct timeval when;
1925 if (request->home_server->server) {
1926 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1930 if (!insert_into_proxy_hash(request)) {
1931 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1935 request->proxy_listener->encode(request->proxy_listener, request);
1937 when = request->received;
1938 when.tv_sec += request->root->max_request_time;
1940 gettimeofday(&request->proxy_when, NULL);
1942 request->next_when = request->proxy_when;
1943 request->next_when.tv_sec += request->home_server->response_window;
1945 rad_assert(request->home_server->response_window > 0);
1947 if (timercmp(&when, &request->next_when, <)) {
1948 request->next_when = when;
1950 request->next_callback = no_response_to_proxied_request;
1952 RDEBUG2("Proxying request %d to home server %s port %d",
1954 inet_ntop(request->proxy->dst_ipaddr.af,
1955 &request->proxy->dst_ipaddr.ipaddr,
1956 buffer, sizeof(buffer)),
1957 request->proxy->dst_port);
1960 * Note that we set proxied BEFORE sending the packet.
1962 * Once we send it, the request is tainted, as
1963 * another thread may have picked it up. Don't
1966 request->num_proxied_requests = 1;
1967 request->num_proxied_responses = 0;
1968 #ifdef HAVE_PTHREAD_H
1969 request->child_pid = NO_SUCH_CHILD_PID;
1971 request->child_state = REQUEST_PROXIED;
1973 DEBUG_PACKET(request, request->proxy, 1);
1975 request->proxy_listener->send(request->proxy_listener,
1982 * "Proxy" the request by sending it to a new virtual server.
1984 static int proxy_to_virtual_server(REQUEST *request)
1987 RAD_REQUEST_FUNP fun;
1989 if (!request->home_server || !request->home_server->server) return 0;
1991 if (request->parent) {
1992 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1996 fake = request_alloc_fake(request);
1998 RDEBUG2("WARNING: Out of memory");
2002 fake->packet->vps = paircopy(request->proxy->vps);
2003 fake->server = request->home_server->server;
2005 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2006 fun = rad_authenticate;
2008 #ifdef WITH_ACCOUNTING
2009 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2010 fun = rad_accounting;
2014 RDEBUG2("Unknown packet type %d", request->proxy->code);
2015 ev_request_free(&fake);
2019 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2020 radius_handle_request(fake, fun);
2021 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2023 if (fake->reply->code != 0) {
2024 request->proxy_reply = fake->reply;
2028 * There was no response
2030 setup_post_proxy_fail(request);
2033 ev_request_free(&fake);
2035 process_proxy_reply(request);
2038 * Process it through the normal section again, but ONLY
2039 * if we received a proxy reply..
2041 if (request->proxy_reply) {
2042 if (request->server) RDEBUG("server %s {",
2043 request->server != NULL ?
2044 request->server : "");
2047 if (request->server) RDEBUG("} # server %s",
2048 request->server != NULL ?
2049 request->server : "");
2052 return 2; /* success, but NOT '1' !*/
2056 * Return 1 if we did proxy it, or the proxy attempt failed
2057 * completely. Either way, the caller doesn't touch the request
2058 * any more if we return 1.
2060 static int successfully_proxied_request(REQUEST *request)
2063 int pre_proxy_type = 0;
2064 VALUE_PAIR *realmpair;
2065 VALUE_PAIR *strippedname;
2067 char *realmname = NULL;
2069 REALM *realm = NULL;
2073 * If it was already proxied, do nothing.
2075 * FIXME: This should really be a serious error.
2077 if (request->in_proxy_hash ||
2078 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2082 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2083 if (!realmpair || (realmpair->length == 0)) {
2086 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2089 switch (request->packet->code) {
2090 case PW_AUTHENTICATION_REQUEST:
2091 pool_type = HOME_TYPE_AUTH;
2094 #ifdef WITH_ACCOUNTING
2095 case PW_ACCOUNTING_REQUEST:
2096 pool_type = HOME_TYPE_ACCT;
2101 case PW_COA_REQUEST:
2102 case PW_DISCONNECT_REQUEST:
2103 pool_type = HOME_TYPE_COA;
2111 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2113 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2118 realmname = NULL; /* no realms */
2123 realmname = (char *) realmpair->vp_strvalue;
2125 realm = realm_find2(realmname);
2127 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2132 * Figure out which pool to use.
2134 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2135 pool = realm->auth_pool;
2137 #ifdef WITH_ACCOUNTING
2138 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2139 pool = realm->acct_pool;
2143 } else if ((request->packet->code == PW_COA_REQUEST) ||
2144 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2145 pool = realm->acct_pool;
2149 rad_panic("Internal sanity check failed");
2153 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2159 home = home_server_ldb(realmname, pool, request);
2161 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2165 request->home_pool = pool;
2169 * Once we've decided to proxy a request, we cannot send
2170 * a CoA packet. So we free up any CoA packet here.
2172 ev_request_free(&request->coa);
2175 * Remember that we sent the request to a Realm.
2177 if (realmname) pairadd(&request->packet->vps,
2178 pairmake("Realm", realmname, T_OP_EQ));
2181 * Strip the name, if told to.
2183 * Doing it here catches the case of proxied tunneled
2186 if (realm && (realm->striprealm == TRUE) &&
2187 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2189 * If there's a Stripped-User-Name attribute in
2190 * the request, then use THAT as the User-Name
2191 * for the proxied request, instead of the
2194 * This is done by making a copy of the
2195 * Stripped-User-Name attribute, turning it into
2196 * a User-Name attribute, deleting the
2197 * Stripped-User-Name and User-Name attributes
2198 * from the vps list, and making the new
2199 * User-Name the head of the vps list.
2201 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2203 vp = radius_paircreate(request, NULL,
2204 PW_USER_NAME, PW_TYPE_STRING);
2205 rad_assert(vp != NULL); /* handled by above function */
2206 /* Insert at the START of the list */
2207 vp->next = request->proxy->vps;
2208 request->proxy->vps = vp;
2210 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2211 sizeof(vp->vp_strvalue));
2212 vp->length = strippedname->length;
2215 * Do NOT delete Stripped-User-Name.
2220 * If there is no PW_CHAP_CHALLENGE attribute but
2221 * there is a PW_CHAP_PASSWORD we need to add it
2222 * since we can't use the request authenticator
2223 * anymore - we changed it.
2225 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2226 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2227 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2228 vp = radius_paircreate(request, &request->proxy->vps,
2229 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2230 vp->length = AUTH_VECTOR_LEN;
2231 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2235 * The RFC's say we have to do this, but FreeRADIUS
2238 vp = radius_paircreate(request, &request->proxy->vps,
2239 PW_PROXY_STATE, PW_TYPE_OCTETS);
2240 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2241 request->packet->id);
2242 vp->length = strlen(vp->vp_strvalue);
2245 * Should be done BEFORE inserting into proxy hash, as
2246 * pre-proxy may use this information, or change it.
2248 request->proxy->code = request->packet->code;
2251 * Call the pre-proxy routines.
2253 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2255 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2256 pre_proxy_type = vp->vp_integer;
2259 rad_assert(request->home_pool != NULL);
2261 if (request->home_pool->virtual_server) {
2262 const char *old_server = request->server;
2264 request->server = request->home_pool->virtual_server;
2265 RDEBUG2(" server %s {", request->server);
2266 rcode = module_pre_proxy(pre_proxy_type, request);
2268 request->server = old_server;
2270 rcode = module_pre_proxy(pre_proxy_type, request);
2273 case RLM_MODULE_FAIL:
2274 case RLM_MODULE_INVALID:
2275 case RLM_MODULE_NOTFOUND:
2276 case RLM_MODULE_USERLOCK:
2278 /* FIXME: debug print failed stuff */
2281 case RLM_MODULE_REJECT:
2282 case RLM_MODULE_HANDLED:
2286 * Only proxy the packet if the pre-proxy code succeeded.
2288 case RLM_MODULE_NOOP:
2290 case RLM_MODULE_UPDATED:
2295 * If it's a fake request, don't send the proxy
2296 * packet. The outer tunnel session will take
2297 * care of doing that.
2299 if (request->packet->dst_port == 0) {
2300 request->home_server = NULL;
2304 if (request->home_server->server) {
2305 return proxy_to_virtual_server(request);
2308 if (!proxy_request(request)) {
2309 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2317 static void request_post_handler(REQUEST *request)
2319 int child_state = -1;
2320 struct timeval when;
2323 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2325 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2326 RDEBUG2("Request %d was cancelled.", request->number);
2327 #ifdef HAVE_PTHREAD_H
2328 request->child_pid = NO_SUCH_CHILD_PID;
2330 child_state = REQUEST_DONE;
2334 if (request->child_state != REQUEST_RUNNING) {
2335 rad_panic("Internal sanity check failed");
2340 * If it's not in the request hash, it's a CoA request.
2343 if (!request->in_request_hash &&
2345 ((request->proxy->code == PW_COA_REQUEST) ||
2346 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2347 request->next_callback = NULL;
2348 child_state = REQUEST_DONE;
2354 * Catch Auth-Type := Reject BEFORE proxying the packet.
2356 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2357 (request->reply->code == 0) &&
2358 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2359 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2360 request->reply->code = PW_AUTHENTICATION_REJECT;
2364 if (request->root->proxy_requests &&
2365 !request->in_proxy_hash &&
2366 (request->reply->code == 0) &&
2367 (request->packet->dst_port != 0) &&
2368 (request->packet->code != PW_STATUS_SERVER)) {
2369 int rcode = successfully_proxied_request(request);
2371 if (rcode == 1) return; /* request is invalid */
2374 * Failed proxying it (dead home servers, etc.)
2375 * Run it through Post-Proxy-Type = Fail, and
2376 * respond to the request.
2378 * Note that we're in a child thread here, so we
2379 * do NOT re-schedule the request. Instead, we
2380 * do what we would have done, which is run the
2381 * pre-handler, a NULL request handler, and then
2384 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2385 request_pre_handler(request);
2389 * Else we weren't supposed to proxy it,
2390 * OR we proxied it internally to a virutal server.
2396 * Fake requests don't get encoded or signed. The caller
2397 * also requires the reply VP's, so we don't free them
2400 if (request->packet->dst_port == 0) {
2401 /* FIXME: RDEBUG going to the next request */
2402 #ifdef HAVE_PTHREAD_H
2403 request->child_pid = NO_SUCH_CHILD_PID;
2405 request->child_state = REQUEST_DONE;
2411 * Copy Proxy-State from the request to the reply.
2413 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2414 if (vp) pairadd(&request->reply->vps, vp);
2418 * Access-Requests get delayed or cached.
2420 switch (request->packet->code) {
2421 case PW_AUTHENTICATION_REQUEST:
2422 gettimeofday(&request->next_when, NULL);
2424 if (request->reply->code == 0) {
2426 * Check if the lack of response is intentional.
2428 vp = pairfind(request->config_items,
2429 PW_RESPONSE_PACKET_TYPE);
2431 RDEBUG2("There was no response configured: rejecting request %d",
2433 request->reply->code = PW_AUTHENTICATION_REJECT;
2435 } else if (vp->vp_integer == 256) {
2436 RDEBUG2("Not responding to request %d",
2440 * Force cleanup after a long
2441 * time, so that we don't
2442 * re-process the packet.
2444 request->next_when.tv_sec += request->root->max_request_time;
2445 request->next_callback = cleanup_delay;
2446 child_state = REQUEST_CLEANUP_DELAY;
2449 request->reply->code = vp->vp_integer;
2455 * Run rejected packets through
2457 * Post-Auth-Type = Reject
2459 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2460 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2461 vp = radius_pairmake(request, &request->config_items,
2462 "Post-Auth-Type", "Reject",
2464 if (vp) rad_postauth(request);
2467 * If configured, delay Access-Reject packets.
2469 * If request->root->reject_delay = 0, we discover
2470 * that we have to send the packet now.
2472 when = request->received;
2473 when.tv_sec += request->root->reject_delay;
2475 if (timercmp(&when, &request->next_when, >)) {
2476 RDEBUG2("Delaying reject of request %d for %d seconds",
2478 request->root->reject_delay);
2479 request->next_when = when;
2480 request->next_callback = reject_delay;
2481 #ifdef HAVE_PTHREAD_H
2482 request->child_pid = NO_SUCH_CHILD_PID;
2484 request->child_state = REQUEST_REJECT_DELAY;
2490 case PW_COA_REQUEST:
2491 case PW_DISCONNECT_REQUEST:
2493 request->next_when.tv_sec += request->root->cleanup_delay;
2494 request->next_callback = cleanup_delay;
2495 child_state = REQUEST_CLEANUP_DELAY;
2498 case PW_ACCOUNTING_REQUEST:
2499 request->next_callback = NULL; /* just to be safe */
2500 child_state = REQUEST_DONE;
2504 * FIXME: Status-Server should probably not be
2507 case PW_STATUS_SERVER:
2508 request->next_callback = NULL;
2509 child_state = REQUEST_DONE;
2516 request->next_callback = NULL;
2517 child_state = REQUEST_DONE;
2522 * Suppress "no reply" packets here, unless we're reading
2523 * from the "detail" file. In that case, we've got to
2524 * tell the detail file handler that the request is dead,
2525 * and it should re-send it.
2526 * If configured, encode, sign, and send.
2528 if ((request->reply->code != 0) ||
2529 (request->listener->type == RAD_LISTEN_DETAIL)) {
2530 DEBUG_PACKET(request, request->reply, 1);
2531 request->listener->send(request->listener, request);
2536 * Now that we've completely processed the request,
2537 * see if we need to originate a CoA request.
2540 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2541 if (!originated_coa_request(request)) {
2542 RDEBUG2("Do CoA Fail handler here");
2544 /* request->coa is stil set, so we can update events */
2550 * Clean up. These are no longer needed.
2552 pairfree(&request->config_items);
2554 pairfree(&request->packet->vps);
2555 request->username = NULL;
2556 request->password = NULL;
2558 pairfree(&request->reply->vps);
2561 if (request->proxy) {
2562 pairfree(&request->proxy->vps);
2564 if (request->proxy_reply) {
2565 pairfree(&request->proxy_reply->vps);
2570 * We're not tracking responses from the home
2571 * server, we can therefore free this memory in
2574 if (!request->in_proxy_hash) {
2575 rad_free(&request->proxy);
2576 rad_free(&request->proxy_reply);
2577 request->home_server = NULL;
2583 RDEBUG2("Finished request %d.", request->number);
2584 rad_assert(child_state >= 0);
2585 request->child_state = child_state;
2588 * Single threaded mode: update timers now.
2590 if (!have_children) wait_a_bit(request);
2594 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2600 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2601 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2603 switch (request->child_state) {
2604 case REQUEST_QUEUED:
2605 case REQUEST_RUNNING:
2609 radlog(L_ERR, "Discarding duplicate request from "
2610 "client %s port %d - ID: %d due to unfinished request %d",
2612 request->packet->src_port,request->packet->id,
2617 case REQUEST_PROXIED:
2619 * We're not supposed to have duplicate
2620 * accounting packets. The other states handle
2621 * duplicates fine (discard, or send duplicate
2622 * reply). But we do NOT want to retransmit an
2623 * accounting request here, because that would
2624 * involve updating the Acct-Delay-Time, and
2625 * therefore changing the packet Id, etc.
2627 * Instead, we just discard the packet. We may
2628 * eventually respond, or the client will send a
2629 * new accounting packet.
2631 * The same comments go for Status-Server, and
2632 * other packet types.
2634 * FIXME: coa: when we proxy CoA && Disconnect
2635 * packets, this logic has to be fixed.
2637 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2641 check_for_zombie_home_server(request);
2644 * If we've just discovered that the home server
2645 * is dead, OR the socket has been closed, look for
2646 * another connection to a home server.
2648 if (((request->packet->dst_port != 0) &&
2649 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2650 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2653 remove_from_proxy_hash(request);
2655 home = home_server_ldb(NULL, request->home_pool, request);
2657 RDEBUG2("Failed to find live home server for request %d", request->number);
2660 * Do post-request processing,
2661 * and any insertion of necessary
2664 post_proxy_fail_handler(request);
2668 request->proxy->code = request->packet->code;
2671 * Free the old packet, to force re-encoding
2673 free(request->proxy->data);
2674 request->proxy->data = NULL;
2675 request->proxy->data_len = 0;
2678 * This request failed over to a virtual
2679 * server. Push it back onto the queue
2682 if (request->home_server->server) {
2683 proxy_fallback_handler(request);
2688 * Try to proxy the request.
2690 if (!proxy_request(request)) {
2691 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2692 goto no_home_servers;
2696 * This code executes in the main server
2697 * thread, so there's no need for locking.
2699 rad_assert(request->next_callback != NULL);
2700 INSERT_EVENT(request->next_callback, request);
2701 request->next_callback = NULL;
2703 } /* else the home server is still alive */
2706 if (request->home_server->proto == IPPROTO_TCP) {
2707 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2708 inet_ntop(request->proxy->dst_ipaddr.af,
2709 &request->proxy->dst_ipaddr.ipaddr,
2710 buffer, sizeof(buffer)),
2711 request->proxy->dst_port,
2712 request->proxy->id);
2717 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2718 inet_ntop(request->proxy->dst_ipaddr.af,
2719 &request->proxy->dst_ipaddr.ipaddr,
2720 buffer, sizeof(buffer)),
2721 request->proxy->dst_port,
2722 request->proxy->id);
2723 request->num_proxied_requests++;
2725 DEBUG_PACKET(request, request->proxy, 1);
2726 request->proxy_listener->send(request->proxy_listener,
2731 case REQUEST_REJECT_DELAY:
2732 RDEBUG2("Waiting to send Access-Reject "
2733 "to client %s port %d - ID: %d",
2735 request->packet->src_port, request->packet->id);
2738 case REQUEST_CLEANUP_DELAY:
2740 if (request->reply->code == 0) {
2741 RDEBUG2("Ignoring retransmit from client %s port %d "
2742 "- ID: %d, no reply was configured",
2744 request->packet->src_port, request->packet->id);
2749 * FIXME: This sends duplicate replies to
2750 * accounting requests, even if Acct-Delay-Time
2751 * or Event-Timestamp is in the packet. In those
2752 * cases, the Id should be changed, and the packet
2755 RDEBUG2("Sending duplicate reply "
2756 "to client %s port %d - ID: %d",
2758 request->packet->src_port, request->packet->id);
2759 DEBUG_PACKET(request, request->reply, 1);
2760 request->listener->send(request->listener, request);
2766 static void received_conflicting_request(REQUEST *request,
2767 const RADCLIENT *client)
2769 radlog(L_ERR, "Received conflicting packet from "
2770 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2772 request->packet->src_port, request->packet->id,
2776 * Nuke it from the request hash, so we can receive new
2779 remove_from_request_hash(request);
2781 switch (request->child_state) {
2783 * Tell it to stop, and wait for it to do so.
2786 request->master_state = REQUEST_STOP_PROCESSING;
2787 request->delay += request->delay >> 1;
2789 tv_add(&request->when, request->delay);
2791 INSERT_EVENT(wait_for_child_to_die, request);
2795 * Catch race conditions. It may have switched
2796 * from running to done while this code is being
2799 case REQUEST_REJECT_DELAY:
2800 case REQUEST_CLEANUP_DELAY:
2807 static int can_handle_new_request(RADIUS_PACKET *packet,
2809 struct main_config_t *root)
2812 * Count the total number of requests, to see if
2813 * there are too many. If so, return with an
2816 if (root->max_requests) {
2817 int request_count = fr_packet_list_num_elements(pl);
2820 * This is a new request. Let's see if
2821 * it makes us go over our configured
2824 if (request_count > root->max_requests) {
2825 radlog(L_ERR, "Dropping request (%d is too many): "
2826 "from client %s port %d - ID: %d", request_count,
2828 packet->src_port, packet->id);
2829 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2830 "\tThe value for 'max_requests' is probably set too low.\n");
2832 } /* else there were a small number of requests */
2833 } /* else there was no configured limit for requests */
2836 * FIXME: Add per-client checks. If one client is sending
2837 * too many packets, start discarding them.
2839 * We increment the counters here, and decrement them
2840 * when the response is sent... somewhere in this file.
2844 * FUTURE: Add checks for system load. If the system is
2845 * busy, start dropping requests...
2847 * We can probably keep some statistics ourselves... if
2848 * there are more requests coming in than we can handle,
2849 * start dropping some.
2856 int received_request(rad_listen_t *listener,
2857 RADIUS_PACKET *packet, REQUEST **prequest,
2860 RADIUS_PACKET **packet_p;
2861 REQUEST *request = NULL;
2862 struct main_config_t *root = &mainconfig;
2864 packet_p = fr_packet_list_find(pl, packet);
2866 request = fr_packet2myptr(REQUEST, packet, packet_p);
2867 rad_assert(request->in_request_hash);
2869 if ((request->packet->data_len == packet->data_len) &&
2870 (memcmp(request->packet->vector, packet->vector,
2871 sizeof(packet->vector)) == 0)) {
2872 received_retransmit(request, client);
2877 * The new request is different from the old one,
2878 * but maybe the old is finished. If so, delete
2881 switch (request->child_state) {
2882 struct timeval when;
2886 * Special hacks for race conditions.
2887 * The reply is encoded, and therefore
2888 * likely sent. We received a *new*
2889 * packet from the client, likely before
2890 * the next line or two of code which
2891 * updated the child state. In this
2892 * case, just accept the new request.
2894 if ((request->reply->code != 0) &&
2895 request->reply->data) {
2896 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2898 packet->src_port, packet->id,
2900 remove_from_request_hash(request);
2905 gettimeofday(&when, NULL);
2909 * If the cached request was received
2910 * within the last second, then we
2911 * discard the NEW request instead of the
2912 * old one. This will happen ONLY when
2913 * the client is severely broken, and is
2914 * sending conflicting packets very
2917 if (timercmp(&when, &request->received, <)) {
2918 radlog(L_ERR, "Discarding conflicting packet from "
2919 "client %s port %d - ID: %d due to recent request %d.",
2921 packet->src_port, packet->id,
2926 received_conflicting_request(request, client);
2930 case REQUEST_REJECT_DELAY:
2931 case REQUEST_CLEANUP_DELAY:
2932 request->child_state = REQUEST_DONE;
2934 cleanup_delay(request);
2941 * We may want to quench the new request.
2943 if ((listener->type != RAD_LISTEN_DETAIL) &&
2944 !can_handle_new_request(packet, client, root)) {
2949 * Create and initialize the new request.
2951 request = request_alloc(); /* never fails */
2953 if ((request->reply = rad_alloc(0)) == NULL) {
2954 radlog(L_ERR, "No memory");
2958 request->listener = listener;
2959 request->client = client;
2960 request->packet = packet;
2961 request->packet->timestamp = request->timestamp;
2962 request->number = request_num_counter++;
2963 request->priority = listener->type;
2964 #ifdef HAVE_PTHREAD_H
2965 request->child_pid = NO_SUCH_CHILD_PID;
2969 * Status-Server packets go to the head of the queue.
2971 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2974 * Set virtual server identity
2976 if (client->server) {
2977 request->server = client->server;
2978 } else if (listener->server) {
2979 request->server = listener->server;
2981 request->server = NULL;
2985 * Remember the request in the list.
2987 if (!fr_packet_list_insert(pl, &request->packet)) {
2988 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2989 ev_request_free(&request);
2993 request->in_request_hash = TRUE;
2994 request->root = root;
2997 request->listener->count++;
3001 * The request passes many of our sanity checks.
3002 * From here on in, if anything goes wrong, we
3003 * send a reject message, instead of dropping the
3008 * Build the reply template from the request.
3011 request->reply->sockfd = request->packet->sockfd;
3012 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3013 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3014 request->reply->dst_port = request->packet->src_port;
3015 request->reply->src_port = request->packet->dst_port;
3016 request->reply->id = request->packet->id;
3017 request->reply->code = 0; /* UNKNOWN code */
3018 memcpy(request->reply->vector, request->packet->vector,
3019 sizeof(request->reply->vector));
3020 request->reply->vps = NULL;
3021 request->reply->data = NULL;
3022 request->reply->data_len = 0;
3024 request->master_state = REQUEST_ACTIVE;
3025 request->child_state = REQUEST_QUEUED;
3026 request->next_callback = NULL;
3028 gettimeofday(&request->received, NULL);
3029 request->timestamp = request->received.tv_sec;
3030 request->when = request->received;
3032 request->delay = USEC;
3034 tv_add(&request->when, request->delay);
3036 INSERT_EVENT(wait_a_bit, request);
3038 *prequest = request;
3044 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3050 * Also removes from the proxy hash if responses == requests
3052 request = lookup_in_proxy_hash(packet);
3055 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3056 inet_ntop(packet->src_ipaddr.af,
3057 &packet->src_ipaddr.ipaddr,
3058 buffer, sizeof(buffer)),
3059 packet->src_port, packet->id);
3064 * We haven't replied to the NAS, but we have seen an
3065 * earlier reply from the home server. Ignore this packet,
3066 * as we're likely still processing the previous reply.
3068 if (request->proxy_reply) {
3069 if (memcmp(request->proxy_reply->vector,
3071 sizeof(request->proxy_reply->vector)) == 0) {
3072 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
3073 inet_ntop(packet->src_ipaddr.af,
3074 &packet->src_ipaddr.ipaddr,
3075 buffer, sizeof(buffer)),
3076 packet->src_port, packet->id,
3080 * ? The home server gave us a new proxy
3081 * reply which doesn't match the old
3084 RDEBUG2("Ignoring conflicting proxy reply");
3087 /* assert that there's an event queued for request? */
3092 * Verify the packet before doing ANYTHING with it. This
3093 * means we're doing more MD5 checks in the server core.
3094 * However, we can fix that by moving to multiple threads
3095 * listening on sockets.
3097 * We do this AFTER looking the request up in the hash,
3098 * and AFTER vhecking if we saw a previous request. This
3099 * helps minimize the DoS effect of people attacking us
3100 * with spoofed packets.
3102 if (rad_verify(packet, request->proxy,
3103 request->home_server->secret) != 0) {
3104 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3108 gettimeofday(&now, NULL);
3111 * Maybe move this earlier in the decision process?
3112 * Having it here means that late or duplicate proxy
3113 * replies no longer get the home server marked as
3114 * "alive". This might be good for stability, though.
3116 * FIXME: Do we really want to do this whenever we
3117 * receive a packet? Setting this here means that we
3118 * mark it alive on *any* packet, even if it's lost all
3119 * of the *other* packets in the last 10s.
3121 if (request->proxy->code != PW_STATUS_SERVER) {
3122 request->home_server->state = HOME_STATE_ALIVE;
3127 * When originating CoA, the "proxy" reply is the reply
3128 * to the CoA request that we originated. At this point,
3129 * the original request is finished, and it has a reply.
3131 * However, if we haven't separated the two requests, do
3132 * so now. This is done so that cleaning up the original
3133 * request won't cause the CoA request to be free'd. See
3134 * util.c, request_free()
3136 if (request->parent && (request->parent->coa == request)) {
3137 request->parent->coa = NULL;
3138 request->parent = NULL;
3142 * Skip the next set of checks, as the original
3143 * reply is cached. We want to be able to still
3144 * process the CoA reply, AND to reference the
3145 * original request/reply.
3147 * This is getting to be really quite a bit of a
3153 * If there's a reply to the NAS, ignore everything
3154 * related to proxy responses
3156 if (request->reply && request->reply->code != 0) {
3157 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3163 * The average includes our time to receive packets and
3164 * look them up in the hashes, which should be the same
3167 * We update the response time only for the FIRST packet
3170 if (request->home_server->ema.window > 0) {
3171 radius_stats_ema(&request->home_server->ema,
3172 &now, &request->proxy_when);
3176 switch (request->child_state) {
3177 case REQUEST_QUEUED:
3178 case REQUEST_RUNNING:
3179 radlog(L_ERR, "Internal sanity check failed for child state");
3182 case REQUEST_REJECT_DELAY:
3183 case REQUEST_CLEANUP_DELAY:
3185 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'",
3186 inet_ntop(packet->src_ipaddr.af,
3187 &packet->src_ipaddr.ipaddr,
3188 buffer, sizeof(buffer)),
3189 packet->src_port, packet->id,
3191 /* assert that there's an event queued for request? */
3194 case REQUEST_PROXIED:
3198 request->proxy_reply = packet;
3202 * Perform RTT calculations, as per RFC 2988 (for TCP).
3203 * Note that we only do so on the first response.
3205 if ((request->num_proxied_responses == 1)
3207 home_server *home = request->home_server;
3209 rtt = now.tv_sec - request->proxy_when.tv_sec;
3212 rtt -= request->proxy_when.tv_usec;
3214 if (!home->has_rtt) {
3215 home->has_rtt = TRUE;
3218 home->rttvar = rtt / 2;
3221 home->rttvar -= home->rttvar >> 2;
3222 home->rttvar += (home->srtt - rtt);
3223 home->srtt -= home->srtt >> 3;
3224 home->srtt += rtt >> 3;
3227 home->rto = home->srtt;
3228 if (home->rttvar > (USEC / 4)) {
3229 home->rto += home->rttvar * 4;
3237 * There's no incoming request, so it's a proxied packet
3240 if (!request->packet) {
3241 received_response_to_ping(request);
3242 request->proxy_reply = NULL; /* caller will free it */
3243 ev_request_free(&request);
3247 request->child_state = REQUEST_QUEUED;
3248 request->when = now;
3249 request->delay = USEC;
3250 request->priority = RAD_LISTEN_PROXY;
3251 tv_add(&request->when, request->delay);
3254 * Wait a bit will take care of max_request_time
3256 INSERT_EVENT(wait_a_bit, request);
3261 #endif /* WITH_PROXY */
3264 static void tcp_socket_lifetime(void *ctx)
3266 rad_listen_t *listener = ctx;
3269 listener->print(listener, buffer, sizeof(buffer));
3271 DEBUG("Reached maximum lifetime on socket %s", buffer);
3273 listener->status = RAD_LISTEN_STATUS_CLOSED;
3274 event_new_fd(listener);
3277 static void tcp_socket_idle_timeout(void *ctx)
3279 rad_listen_t *listener = ctx;
3280 listen_socket_t *sock = listener->data;
3283 fr_event_now(el, &now); /* should always succeed... */
3285 rad_assert(sock->home != NULL);
3288 * We implement idle timeout by polling, because it's
3289 * cheaper than resetting the idle timeout every time
3290 * we send / receive a packet.
3292 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3293 struct timeval when;
3294 void *fun = tcp_socket_idle_timeout;
3296 when.tv_sec = sock->last_packet;
3297 when.tv_sec += sock->home->idle_timeout;
3300 if (sock->home->lifetime &&
3301 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3302 when.tv_sec = sock->opened + sock->home->lifetime;
3303 fun = tcp_socket_lifetime;
3306 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3307 rad_panic("Failed to insert event");
3313 listener->print(listener, buffer, sizeof(buffer));
3315 DEBUG("Reached idle timeout on socket %s", buffer);
3317 listener->status = RAD_LISTEN_STATUS_CLOSED;
3318 event_new_fd(listener);
3322 void event_new_fd(rad_listen_t *this)
3326 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3328 this->print(this, buffer, sizeof(buffer));
3330 if (this->status == RAD_LISTEN_STATUS_INIT) {
3332 DEBUG("Listening on %s", buffer);
3334 radlog(L_INFO, " ... adding new socket %s", buffer);
3339 * Add it to the list of sockets we can use.
3340 * Server sockets (i.e. auth/acct) are never
3341 * added to the packet list.
3343 if (this->type == RAD_LISTEN_PROXY) {
3344 listen_socket_t *sock = this->data;
3346 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3347 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3349 &sock->other_ipaddr, sock->other_port,
3351 radlog(L_ERR, "Fatal error adding socket: %s",
3358 sock->home->num_connections++;
3361 * If necessary, add it to the list of
3362 * new proxy listeners.
3364 if (sock->home->lifetime || sock->home->idle_timeout) {
3365 this->next = proxy_listener_list;
3366 proxy_listener_list = this;
3369 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3372 * Tell the main thread that we've added
3373 * a proxy listener, but only if we need
3374 * to update the event list. Do this
3375 * with the mutex unlocked, to reduce
3379 if (sock->home->lifetime || sock->home->idle_timeout) {
3380 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3388 * Detail files are always known, and aren't
3389 * put into the socket event loop.
3391 if (this->type == RAD_LISTEN_DETAIL) {
3392 this->status = RAD_LISTEN_STATUS_KNOWN;
3395 * Set up the first poll interval.
3397 event_poll_detail(this);
3402 FD_MUTEX_LOCK(&fd_mutex);
3403 if (!fr_event_fd_insert(el, 0, this->fd,
3404 event_socket_handler, this)) {
3405 radlog(L_ERR, "Failed remembering handle for proxy socket!");
3408 FD_MUTEX_UNLOCK(&fd_mutex);
3410 this->status = RAD_LISTEN_STATUS_KNOWN;
3415 * Something went wrong with the socket: make it harmless.
3417 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3421 * Remove it from the list of live FD's.
3423 FD_MUTEX_LOCK(&fd_mutex);
3424 fr_event_fd_delete(el, 0, this->fd);
3425 FD_MUTEX_UNLOCK(&fd_mutex);
3428 if (this->type != RAD_LISTEN_PROXY)
3431 if (this->count != 0) {
3432 fr_packet_list_walk(pl, this,
3433 remove_all_requests);
3436 if (this->count == 0) {
3437 this->status = RAD_LISTEN_STATUS_FINISH;
3443 int count = this->count;
3448 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3449 if (!fr_packet_list_socket_freeze(proxy_list,
3451 radlog(L_ERR, "Fatal error freezing socket: %s",
3457 * Doing this with the proxy mutex held
3458 * is a Bad Thing. We should move to
3459 * finer-grained mutexes.
3461 count = this->count;
3463 fr_packet_list_walk(proxy_list, this,
3464 remove_all_proxied_requests);
3466 count = this->count; /* protected by mutex */
3467 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3470 this->status = RAD_LISTEN_STATUS_FINISH;
3477 * Re-open the socket, pointing it to /dev/null.
3478 * This means that all writes proceed without
3479 * blocking, and all reads return "no data".
3481 * This leaves the socket active, so any child
3482 * threads won't go insane. But it means that
3483 * they cannot send or receive any packets.
3485 * This is EXTRA work in the normal case, when
3486 * sockets are closed without error. But it lets
3487 * us have one simple processing method for all
3490 devnull = open("/dev/null", O_RDWR);
3492 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3496 if (dup2(devnull, this->fd) < 0) {
3497 radlog(L_ERR, "FATAL failure closing socket: %s",
3503 this->status = RAD_LISTEN_STATUS_CLOSED;
3506 * Fall through to the next section.
3511 * Called ONLY from the main thread. On the following
3517 * (and falling through from "forcibly close FD" above)
3518 * client closed connection on us
3519 * client sent us a bad packet.
3521 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3522 int count = this->count;
3523 rad_assert(this->type != RAD_LISTEN_DETAIL);
3527 * Remove it from the list of active sockets, so
3528 * that it isn't used when proxying new packets.
3530 if (this->type == RAD_LISTEN_PROXY) {
3531 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3532 if (!fr_packet_list_socket_freeze(proxy_list,
3534 radlog(L_ERR, "Fatal error freezing socket: %s",
3538 count = this->count; /* protected by mutex */
3539 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3544 * Requests are still using the socket. Wait for
3548 struct timeval when;
3549 listen_socket_t *sock = this->data;
3552 * Try again to clean up the socket in 30
3555 gettimeofday(&when, NULL);
3558 if (!fr_event_insert(el,
3559 (fr_event_callback_t) event_new_fd,
3560 this, &when, &sock->ev)) {
3561 rad_panic("Failed to insert event");
3568 * No one is using this socket: we can delete it
3571 this->status = RAD_LISTEN_STATUS_FINISH;
3575 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3576 listen_socket_t *sock = this->data;
3578 rad_assert(this->count == 0);
3579 radlog(L_INFO, " ... closing socket %s", buffer);
3582 * Remove it from the list of live FD's. Note
3583 * that it MAY also have been removed above. We
3584 * do it again here, to catch the case of sockets
3585 * closing on idle timeout, or max
3586 * lifetime... AFTER all requests have finished
3589 FD_MUTEX_LOCK(&fd_mutex);
3590 fr_event_fd_delete(el, 0, this->fd);
3591 FD_MUTEX_UNLOCK(&fd_mutex);
3595 * Remove it from the list of sockets to be used
3598 if (this->type == RAD_LISTEN_PROXY) {
3599 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3600 if (!fr_packet_list_socket_remove(proxy_list,
3602 radlog(L_ERR, "Fatal error removing socket: %s",
3606 if (sock->home) sock->home->num_connections--;
3607 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3612 * Remove any pending cleanups.
3614 if (sock->ev) fr_event_delete(el, &sock->ev);
3617 * And finally, close the socket.
3623 static void handle_signal_self(int flag)
3625 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3626 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3627 radlog(L_INFO, "Received TERM signal");
3628 fr_event_loop_exit(el, 1);
3630 fr_event_loop_exit(el, 2);
3634 } /* else exit/term flags weren't set */
3637 * Tell the even loop to stop processing.
3639 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3641 static time_t last_hup = 0;
3643 radlog(L_INFO, "Received HUP signal.");
3646 if ((int) (when - last_hup) < 5) {
3647 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3652 fr_event_loop_exit(el, 0x80);
3656 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3660 * FIXME: O(N) loops suck.
3662 for (this = mainconfig.listen;
3664 this = this->next) {
3665 if (this->type != RAD_LISTEN_DETAIL) continue;
3668 * This one didn't send the signal, skip
3671 if (!this->decode(this, NULL)) continue;
3674 * Go service the interrupt.
3676 event_poll_detail(this);
3683 * Add event handlers for idle timeouts && maximum lifetime.
3685 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3686 struct timeval when;
3689 fr_event_now(el, &now);
3691 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3693 while (proxy_listener_list) {
3694 rad_listen_t *this = proxy_listener_list;
3695 listen_socket_t *sock = this->data;
3697 proxy_listener_list = this->next;
3700 if (!sock->home) continue; /* skip UDP sockets */
3704 if (!sock->home->idle_timeout) {
3705 rad_assert(sock->home->lifetime != 0);
3707 when.tv_sec += sock->home->lifetime;
3708 fun = tcp_socket_lifetime;
3710 rad_assert(sock->home->idle_timeout != 0);
3712 when.tv_sec += sock->home->idle_timeout;
3713 fun = tcp_socket_idle_timeout;
3716 if (!fr_event_insert(el, fun, this, &when,
3718 rad_panic("Failed to insert event");
3722 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3727 #ifndef WITH_SELF_PIPE
3728 void radius_signal_self(int flag)
3730 handle_signal_self(flag);
3734 * Inform ourselves that we received a signal.
3736 void radius_signal_self(int flag)
3742 * The read MUST be non-blocking for this to work.
3744 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3748 for (i = 0; i < rcode; i++) {
3749 buffer[0] |= buffer[i];
3757 write(self_pipe[1], buffer, 1);
3761 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3762 UNUSED int fd, UNUSED void *ctx)
3767 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3768 if (rcode <= 0) return;
3771 * Merge pending signals.
3773 for (i = 0; i < rcode; i++) {
3774 buffer[0] |= buffer[i];
3777 handle_signal_self(buffer[0]);
3782 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3785 rad_listen_t *listener = ctx;
3786 RAD_REQUEST_FUNP fun;
3789 rad_assert(xel == el);
3793 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3795 if (!listener->recv(listener, &fun, &request)) return;
3797 if (!thread_pool_addrequest(request, fun)) {
3798 request->child_state = REQUEST_DONE;
3804 * This function is called periodically to see if this detail
3805 * file is available for reading.
3807 static void event_poll_detail(void *ctx)
3810 RAD_REQUEST_FUNP fun;
3812 rad_listen_t *this = ctx;
3813 struct timeval when;
3814 listen_detail_t *detail = this->data;
3816 rad_assert(this->type == RAD_LISTEN_DETAIL);
3819 * Try to read something.
3821 * FIXME: This does poll AND receive.
3823 rcode = this->recv(this, &fun, &request);
3825 rad_assert(fun != NULL);
3826 rad_assert(request != NULL);
3828 if (!thread_pool_addrequest(request, fun)) {
3829 request->child_state = REQUEST_DONE;
3833 fr_event_now(el, &now);
3837 * Backdoor API to get the delay until the next poll
3840 delay = this->encode(this, NULL);
3841 tv_add(&when, delay);
3843 if (!fr_event_insert(el, event_poll_detail, this,
3844 &when, &detail->ev)) {
3845 radlog(L_ERR, "Failed creating handler");
3851 static void event_status(struct timeval *wake)
3853 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3857 if (debug_flag == 0) {
3859 radlog(L_INFO, "Ready to process requests.");
3860 just_started = FALSE;
3866 radlog(L_INFO, "Ready to process requests.");
3868 } else if ((wake->tv_sec != 0) ||
3869 (wake->tv_usec >= 100000)) {
3870 DEBUG("Waking up in %d.%01u seconds.",
3871 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3876 * FIXME: Put this somewhere else, where it isn't called
3877 * all of the time...
3880 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3882 * If there are no child threads, then there may
3883 * be child processes. In that case, wait for
3884 * their exit status, and throw that exit status
3885 * away. This helps get rid of zxombie children.
3887 while (waitpid(-1, &argval, WNOHANG) > 0) {
3895 * Externally-visibly functions.
3897 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3899 rad_listen_t *head = NULL;
3903 time(&fr_start_time);
3905 el = fr_event_list_create(event_status);
3908 pl = fr_packet_list_create(0);
3909 if (!pl) return 0; /* leak el */
3911 request_num_counter = 0;
3914 if (mainconfig.proxy_requests) {
3916 * Create the tree for managing proxied requests and
3919 proxy_list = fr_packet_list_create(1);
3920 if (!proxy_list) return 0;
3922 #ifdef HAVE_PTHREAD_H
3923 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3924 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3933 * Just before we spawn the child threads, force the log
3934 * subsystem to re-open the log file for every write.
3936 if (spawn_flag) force_log_reopen();
3938 #ifdef HAVE_PTHREAD_H
3940 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3942 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3945 * Initialize the threads ONLY if we're spawning, AND
3946 * we're running normally.
3948 if (spawn_flag && !check_config &&
3949 (thread_pool_init(cs, &spawn_flag) < 0)) {
3955 * Move all of the thread calls to this file?
3957 * It may be best for the mutexes to be in this file...
3959 have_children = spawn_flag;
3962 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3967 #ifdef WITH_SELF_PIPE
3969 * Child threads need a pipe to signal us, as do the
3972 if (pipe(self_pipe) < 0) {
3973 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3977 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3978 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3982 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3983 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3988 if (!fr_event_fd_insert(el, 0, self_pipe[0],
3989 event_signal_handler, el)) {
3990 radlog(L_ERR, "Failed creating handler for signals");
3993 #endif /* WITH_SELF_PIPE */
3995 DEBUG("%s: #### Opening IP addresses and Ports ####",
3999 * The server temporarily switches to an unprivileged
4000 * user very early in the bootstrapping process.
4001 * However, some sockets MAY require privileged access
4002 * (bind to device, or to port < 1024, or to raw
4003 * sockets). Those sockets need to call suid up/down
4004 * themselves around the functions that need a privileged
4007 if (listen_init(cs, &head) < 0) {
4011 mainconfig.listen = head;
4014 * At this point, no one has any business *ever* going
4017 fr_suid_down_permanent();
4023 static int request_hash_cb(UNUSED void *ctx, void *data)
4025 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4028 rad_assert(request->in_proxy_hash == FALSE);
4031 ev_request_free(&request);
4038 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4040 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4042 ev_request_free(&request);
4048 void radius_event_free(void)
4051 * FIXME: Stop all threads, or at least check that
4052 * they're all waiting on the semaphore, and the queues
4058 * There are requests in the proxy hash that aren't
4059 * referenced from anywhere else. Remove them first.
4062 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4063 fr_packet_list_free(proxy_list);
4068 fr_packet_list_walk(pl, NULL, request_hash_cb);
4070 fr_packet_list_free(pl);
4073 fr_event_list_free(el);
4076 int radius_event_process(void)
4080 return fr_event_loop(el);
4083 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4085 request->options = RAD_REQUEST_OPTION_DEBUG2;
4087 if (request_pre_handler(request)) {
4088 rad_assert(fun != NULL);
4089 rad_assert(request != NULL);
4091 if (request->server) RDEBUG("server %s {",
4092 request->server != NULL ?
4093 request->server : "");
4096 if (request->server) RDEBUG("} # server %s",
4097 request->server != NULL ?
4098 request->server : "");
4100 request_post_handler(request);
4103 DEBUG2("Going to the next request");