2 * event.c Server event handling
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2007 The FreeRADIUS server project
21 * Copyright 2007 Alan DeKok <aland@deployingradius.com>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/radiusd.h>
28 #include <freeradius-devel/modules.h>
29 #include <freeradius-devel/event.h>
30 #include <freeradius-devel/detail.h>
32 #include <freeradius-devel/rad_assert.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
41 #define USEC (1000000)
43 extern pid_t radius_pid;
45 extern int check_config;
46 extern char *debug_condition;
49 * Ridiculous amounts of local state.
51 static fr_event_list_t *el = NULL;
52 static fr_packet_list_t *pl = NULL;
53 static int request_num_counter = 0;
54 static struct timeval now;
56 static int have_children;
57 static int just_started = TRUE;
61 #define WITH_SELF_PIPE (1)
66 static int self_pipe[2];
71 static pthread_mutex_t proxy_mutex;
72 static rad_listen_t *proxy_listener_list = NULL;
73 static int proxy_no_new_sockets = FALSE;
76 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
77 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
79 static pthread_t NO_SUCH_CHILD_PID;
82 * This is easier than ifdef's throughout the code.
84 #define PTHREAD_MUTEX_LOCK(_x)
85 #define PTHREAD_MUTEX_UNLOCK(_x)
89 * We need mutexes around the event FD list *only* in certain
92 #if defined (HAVE_PTHREAD_H) && (defined(WITH_PROXY) || defined(WITH_TCP))
93 static pthread_mutex_t fd_mutex;
94 #define FD_MUTEX_LOCK if (have_children) pthread_mutex_lock
95 #define FD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
98 * This is easier than ifdef's throughout the code.
100 #define FD_MUTEX_LOCK(_x)
101 #define FD_MUTEX_UNLOCK(_x)
105 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
108 static fr_packet_list_t *proxy_list = NULL;
109 static void remove_from_proxy_hash(REQUEST *request);
111 static void check_for_zombie_home_server(REQUEST *request);
113 #define remove_from_proxy_hash(foo)
116 static void request_post_handler(REQUEST *request);
117 static void wait_a_bit(void *ctx);
118 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
120 static void event_poll_detail(void *ctx);
123 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
126 radlog(L_ERR, "[%s:%d] %s", file, line, msg);
130 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
133 static void tv_add(struct timeval *tv, int usec_delay)
135 if (usec_delay > USEC) {
136 tv->tv_sec += usec_delay / USEC;
139 tv->tv_usec += usec_delay;
141 if (tv->tv_usec > USEC) {
142 tv->tv_sec += tv->tv_usec / USEC;
147 static void remove_from_request_hash(REQUEST *request)
149 if (!request->in_request_hash) return;
151 fr_packet_list_yank(pl, request->packet);
152 request->in_request_hash = FALSE;
155 * FIXME: Move this to a "statistics" thread?
156 * Or (short term) add a mutex lock around it.
158 request_stats_final(request);
161 request->listener->count--;
165 static void ev_request_free(REQUEST **prequest)
169 if (!prequest || !*prequest) return;
176 * Divorce the child from the parent first,
177 * then clean up the child.
179 request->coa->parent = NULL;
180 ev_request_free(&request->coa);
184 * Divorce the parent from the child, and leave the
185 * parent still alive.
187 if (request->parent && (request->parent->coa == request)) {
188 request->parent->coa = NULL;
192 if (request->ev) fr_event_delete(el, &request->ev);
194 if (request->in_proxy_hash) remove_from_proxy_hash(request);
196 if (request->in_request_hash) remove_from_request_hash(request);
198 request_free(prequest);
202 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
204 RADIUS_PACKET **proxy_p;
207 PTHREAD_MUTEX_LOCK(&proxy_mutex);
208 proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
211 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
215 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
216 request->num_proxied_responses++; /* needs to be protected by lock */
218 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
224 static void remove_from_proxy_hash(REQUEST *request)
227 * Check this without grabbing the mutex because it's a
228 * lot faster that way.
230 if (!request->in_proxy_hash) return;
233 * The "not in hash" flag is definitive. However, if the
234 * flag says that it IS in the hash, there might still be
235 * a race condition where it isn't.
237 PTHREAD_MUTEX_LOCK(&proxy_mutex);
239 if (!request->in_proxy_hash) {
240 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
244 fr_packet_list_yank(proxy_list, request->proxy);
245 fr_packet_list_id_free(proxy_list, request->proxy);
248 * On the FIRST reply, decrement the count of outstanding
249 * requests. Note that this is NOT the count of sent
250 * packets, but whether or not the home server has
253 if (!request->proxy_reply &&
254 request->home_server &&
255 request->home_server->currently_outstanding) {
256 request->home_server->currently_outstanding--;
260 request->proxy_listener->count--;
261 request->proxy_listener = NULL;
265 * Got from YES in hash, to NO, not in hash while we hold
266 * the mutex. This guarantees that when another thread
267 * grabs the mutex, the "not in hash" flag is correct.
269 request->in_proxy_hash = FALSE;
271 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
273 #endif /* WITH_PROXY */
276 static int remove_all_requests(void *ctx, void *data)
278 rad_listen_t *this = ctx;
279 RADIUS_PACKET **packet_p = data;
282 request = fr_packet2myptr(REQUEST, packet, packet_p);
283 if (request->packet->sockfd != this->fd) return 0;
285 switch (request->child_state) {
286 case REQUEST_RUNNING:
287 rad_assert(request->ev != NULL); /* or it's lost forever */
289 request->master_state = REQUEST_STOP_PROCESSING;
293 * Waiting for a reply. There's no point in
294 * doing anything else. We remove it from the
295 * request hash so that we can close the upstream
298 case REQUEST_PROXIED:
299 remove_from_request_hash(request);
300 request->child_state = REQUEST_DONE;
303 case REQUEST_REJECT_DELAY:
304 case REQUEST_CLEANUP_DELAY:
306 ev_request_free(&request);
314 static int remove_all_proxied_requests(void *ctx, void *data)
316 rad_listen_t *this = ctx;
317 RADIUS_PACKET **proxy_p = data;
320 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
321 if (request->proxy->sockfd != this->fd) return 0;
323 switch (request->child_state) {
324 case REQUEST_RUNNING:
325 rad_assert(request->ev != NULL); /* or it's lost forever */
327 request->master_state = REQUEST_STOP_PROCESSING;
331 * Eventually we will discover that there is no
332 * response to the proxied request.
334 case REQUEST_PROXIED:
338 * Keep it in the cache for duplicate detection.
340 case REQUEST_REJECT_DELAY:
341 case REQUEST_CLEANUP_DELAY:
346 remove_from_proxy_hash(request);
349 #endif /* WITH_PROXY */
350 #endif /* WITH_TCP */
354 static int insert_into_proxy_hash(REQUEST *request)
358 void *proxy_listener;
360 rad_assert(request->proxy != NULL);
361 rad_assert(proxy_list != NULL);
365 PTHREAD_MUTEX_LOCK(&proxy_mutex);
366 rcode = fr_packet_list_id_alloc(proxy_list,
367 request->home_server->proto,
368 request->proxy, &proxy_listener);
369 request->num_proxied_requests = 1;
370 request->num_proxied_responses = 0;
371 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
374 if (proxy_no_new_sockets) return 0;
377 * Also locks the proxy mutex, so we have to call
378 * it with the mutex unlocked. Some systems
379 * don't support recursive mutexes.
381 if (!proxy_new_listener(request->home_server, 0)) {
382 radlog(L_ERR, "Failed to create a new socket for proxying requests.");
385 request->proxy->src_port = 0; /* Use any new socket */
389 RDEBUG2("ERROR: Failed allocating Id for new socket when proxying requests.");
396 request->proxy_listener = proxy_listener;
398 PTHREAD_MUTEX_LOCK(&proxy_mutex);
399 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
400 fr_packet_list_id_free(proxy_list, request->proxy);
401 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
402 radlog(L_PROXY, "Failed to insert entry into proxy list");
406 request->in_proxy_hash = TRUE;
409 * Keep track of maximum outstanding requests to a
410 * particular home server. 'max_outstanding' is
411 * enforced in home_server_ldb(), in realms.c.
413 if (request->home_server) {
414 request->home_server->currently_outstanding++;
418 request->proxy_listener->count++;
421 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
423 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
424 inet_ntop(request->proxy->dst_ipaddr.af,
425 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
426 request->proxy->dst_port,
434 * Called as BOTH an event, and in-line from other functions.
436 static void wait_for_proxy_id_to_expire(void *ctx)
438 REQUEST *request = ctx;
440 rad_assert(request->magic == REQUEST_MAGIC);
441 rad_assert(request->proxy != NULL);
443 fr_event_now(el, &now);
444 request->when = request->proxy_when;
447 if (((request->proxy->code == PW_COA_REQUEST) ||
448 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
449 (request->packet->code != request->proxy->code)) {
450 request->when.tv_sec += request->home_server->coa_mrd;
453 request->when.tv_sec += request->home_server->response_window;
455 if ((request->num_proxied_requests == request->num_proxied_responses) ||
457 (request->home_server->proto == IPPROTO_TCP) ||
459 timercmp(&now, &request->when, >)) {
460 if (request->packet) {
461 RDEBUG2("Cleaning up request packet ID %d with timestamp +%d",
463 (unsigned int) (request->timestamp - fr_start_time));
465 RDEBUG2("Cleaning up request with timestamp +%d",
466 (unsigned int) (request->timestamp - fr_start_time));
469 ev_request_free(&request);
473 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
477 #ifdef HAVE_PTHREAD_H
478 static void wait_for_child_to_die(void *ctx)
480 REQUEST *request = ctx;
482 rad_assert(request->magic == REQUEST_MAGIC);
483 remove_from_request_hash(request);
486 * If it's still queued (waiting for a thread to pick it
487 * up) OR, it's running AND there's still a child thread
488 * handling it, THEN delay some more.
490 if ((request->child_state == REQUEST_QUEUED) ||
491 ((request->child_state == REQUEST_RUNNING) &&
492 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0))) {
495 * Cap delay at max_request_time
497 if (request->delay < (USEC * request->root->max_request_time)) {
498 request->delay += (request->delay >> 1);
499 radlog_request(L_INFO, 0, request, "WARNING: Child is hung in component %s module %s.",
500 request->component, request->module);
502 request->delay = USEC * request->root->max_request_time;
503 RDEBUG2("WARNING: Child is still stuck");
505 tv_add(&request->when, request->delay);
507 INSERT_EVENT(wait_for_child_to_die, request);
511 RDEBUG2("Child is finally responsive");
514 if (request->proxy) {
515 wait_for_proxy_id_to_expire(request);
520 ev_request_free(&request);
524 static void cleanup_delay(void *ctx)
526 REQUEST *request = ctx;
528 rad_assert(request->magic == REQUEST_MAGIC);
529 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
530 (request->child_state == REQUEST_DONE));
532 remove_from_request_hash(request);
535 if (request->proxy && request->in_proxy_hash) {
536 wait_for_proxy_id_to_expire(request);
541 RDEBUG2("Cleaning up request packet ID %d with timestamp +%d",
543 (unsigned int) (request->timestamp - fr_start_time));
545 ev_request_free(&request);
550 * In daemon mode, AND this request has debug flags set.
552 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
554 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
558 const char *received, *from;
559 const fr_ipaddr_t *ip;
564 rad_assert(request->radlog != NULL);
566 if (direction == 0) {
567 received = "Received";
568 from = "from"; /* what else? */
569 ip = &packet->src_ipaddr;
570 port = packet->src_port;
573 received = "Sending";
574 from = "to"; /* hah! */
575 ip = &packet->dst_ipaddr;
576 port = packet->dst_port;
580 * Client-specific debugging re-prints the input
581 * packet into the client log.
583 * This really belongs in a utility library
585 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
586 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
587 received, fr_packet_codes[packet->code], from,
588 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
589 port, packet->id, packet->data_len);
591 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
593 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
595 packet->code, packet->id, packet->data_len);
598 for (vp = packet->vps; vp != NULL; vp = vp->next) {
599 vp_prints(buffer, sizeof(buffer), vp);
600 request->radlog(L_DBG, 0, request, "\t%s", buffer);
604 static void reject_delay(void *ctx)
606 REQUEST *request = ctx;
608 rad_assert(request->magic == REQUEST_MAGIC);
609 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
611 RDEBUG2("Sending delayed reject");
613 DEBUG_PACKET(request, request->reply, 1);
615 request->listener->send(request->listener, request);
617 request->when.tv_sec += request->root->cleanup_delay;
618 request->child_state = REQUEST_CLEANUP_DELAY;
620 INSERT_EVENT(cleanup_delay, request);
625 void revive_home_server(void *ctx)
627 home_server *home = ctx;
631 rad_assert(home->proto != IPPROTO_TCP);
634 home->state = HOME_STATE_ALIVE;
635 home->currently_outstanding = 0;
636 home->revive_time = now;
639 * Delete any outstanding events.
641 if (home->ev) fr_event_delete(el, &home->ev);
643 radlog(L_PROXY, "Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
644 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
645 buffer, sizeof(buffer)),
651 static void no_response_to_ping(void *ctx)
653 REQUEST *request = ctx;
657 rad_assert(request->home_server != NULL);
659 home = request->home_server;
661 rad_assert(home->proto != IPPROTO_TCP);
664 home->num_received_pings = 0;
666 radlog(L_ERR, "No response to status check %d for home server %s port %d",
668 inet_ntop(request->proxy->dst_ipaddr.af,
669 &request->proxy->dst_ipaddr.ipaddr,
670 buffer, sizeof(buffer)),
671 request->proxy->dst_port);
673 check_for_zombie_home_server(request);
675 wait_for_proxy_id_to_expire(request);
680 * Note that we don't care what the value of the code field is.
681 * If the response has a valid (src ip/port, dst ip/port), id,
682 * and correctly signed Message-Authenticator, that's good
685 static void received_response_to_ping(REQUEST *request)
690 rad_assert(request->home_server != NULL);
692 home = request->home_server;
694 rad_assert(home->proto != IPPROTO_TCP);
697 home->num_received_pings++;
699 radlog(L_PROXY, "Received response to status check %d (%d in current sequence)",
700 request->number, home->num_received_pings);
703 * Remove the request from any hashes
705 fr_event_delete(el, &request->ev);
706 remove_from_proxy_hash(request);
707 rad_assert(request->in_request_hash == FALSE);
710 * The control socket may have marked the home server as
711 * alive. OR, it may have suddenly started responding to
712 * requests again. If so, don't re-do the "make alive"
715 if (home->state == HOME_STATE_ALIVE) return;
718 * We haven't received enough ping responses to mark it
719 * "alive". Wait a bit.
721 if (home->num_received_pings < home->num_pings_to_alive) {
725 home->state = HOME_STATE_ALIVE;
726 home->currently_outstanding = 0;
727 home->revive_time = now;
729 if (!fr_event_delete(el, &home->ev)) {
730 RDEBUG2("Hmm... no event for home server. Oh well.");
733 radlog(L_PROXY, "Marking home server %s port %d alive",
734 inet_ntop(request->proxy->dst_ipaddr.af,
735 &request->proxy->dst_ipaddr.ipaddr,
736 buffer, sizeof(buffer)),
737 request->proxy->dst_port);
742 * Called from start of zombie period, OR after control socket
743 * marks the home server dead.
745 static void ping_home_server(void *ctx)
748 home_server *home = ctx;
753 rad_assert(home->proto != IPPROTO_TCP);
756 if ((home->state == HOME_STATE_ALIVE) ||
757 (home->ping_check == HOME_PING_CHECK_NONE) ||
758 (home->ev != NULL)) {
762 request = request_alloc();
763 request->number = request_num_counter++;
765 request->proxy = rad_alloc(1);
766 rad_assert(request->proxy != NULL);
768 fr_event_now(el, &request->when);
769 home->when = request->when;
771 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
772 request->proxy->code = PW_STATUS_SERVER;
774 radius_pairmake(request, &request->proxy->vps,
775 "Message-Authenticator", "0x00", T_OP_SET);
777 } else if (home->type == HOME_TYPE_AUTH) {
778 request->proxy->code = PW_AUTHENTICATION_REQUEST;
780 radius_pairmake(request, &request->proxy->vps,
781 "User-Name", home->ping_user_name, T_OP_SET);
782 radius_pairmake(request, &request->proxy->vps,
783 "User-Password", home->ping_user_password, T_OP_SET);
784 radius_pairmake(request, &request->proxy->vps,
785 "Service-Type", "Authenticate-Only", T_OP_SET);
786 radius_pairmake(request, &request->proxy->vps,
787 "Message-Authenticator", "0x00", T_OP_SET);
790 #ifdef WITH_ACCOUNTING
791 request->proxy->code = PW_ACCOUNTING_REQUEST;
793 radius_pairmake(request, &request->proxy->vps,
794 "User-Name", home->ping_user_name, T_OP_SET);
795 radius_pairmake(request, &request->proxy->vps,
796 "Acct-Status-Type", "Stop", T_OP_SET);
797 radius_pairmake(request, &request->proxy->vps,
798 "Acct-Session-Id", "00000000", T_OP_SET);
799 vp = radius_pairmake(request, &request->proxy->vps,
800 "Event-Timestamp", "0", T_OP_SET);
801 vp->vp_date = now.tv_sec;
803 rad_assert("Internal sanity check failed");
807 radius_pairmake(request, &request->proxy->vps,
808 "NAS-Identifier", "Status Check. Are you alive?",
811 request->proxy->dst_ipaddr = home->ipaddr;
812 request->proxy->dst_port = home->port;
813 request->home_server = home;
815 rad_assert(request->proxy_listener == NULL);
817 if (!insert_into_proxy_hash(request)) {
818 radlog(L_PROXY, "Failed inserting status check %d into proxy hash. Discarding it.",
820 ev_request_free(&request);
823 rad_assert(request->proxy_listener != NULL);
824 request->proxy_listener->send(request->proxy_listener,
827 request->next_callback = NULL;
828 request->child_state = REQUEST_PROXIED;
829 request->when.tv_sec += home->ping_timeout;;
831 INSERT_EVENT(no_response_to_ping, request);
834 * Add +/- 2s of jitter, as suggested in RFC 3539
835 * and in the Issues and Fixes draft.
837 home->when.tv_sec += home->ping_interval - 2;
840 jitter ^= (jitter >> 10);
841 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
843 tv_add(&home->when, jitter);
845 INSERT_EVENT(ping_home_server, home);
849 void mark_home_server_dead(home_server *home, struct timeval *when)
851 int previous_state = home->state;
854 radlog(L_PROXY, "Marking home server %s port %d as dead.",
855 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
856 buffer, sizeof(buffer)),
859 home->state = HOME_STATE_IS_DEAD;
860 home->num_received_pings = 0;
862 if (home->ping_check != HOME_PING_CHECK_NONE) {
864 * If the control socket marks us dead, start
865 * pinging. Otherwise, we already started
866 * pinging when it was marked "zombie".
868 if (previous_state == HOME_STATE_ALIVE) {
869 ping_home_server(home);
874 * Revive it after a fixed period of time. This
875 * is very, very, bad.
878 home->when.tv_sec += home->revive_interval;
880 INSERT_EVENT(revive_home_server, home);
884 static void check_for_zombie_home_server(REQUEST *request)
889 home = request->home_server;
891 if (home->state != HOME_STATE_ZOMBIE) return;
893 when = home->zombie_period_start;
894 when.tv_sec += home->zombie_period;
896 fr_event_now(el, &now);
897 if (timercmp(&now, &when, <)) {
901 mark_home_server_dead(home, &request->when);
904 static int proxy_to_virtual_server(REQUEST *request);
906 static int virtual_server_handler(UNUSED REQUEST *request)
908 proxy_to_virtual_server(request);
912 static void proxy_fallback_handler(REQUEST *request)
915 * A proper time is required for wait_a_bit.
917 request->delay = USEC / 10;
918 gettimeofday(&now, NULL);
919 request->next_when = now;
920 tv_add(&request->next_when, request->delay);
921 request->next_callback = wait_a_bit;
924 * Re-queue the request.
926 request->child_state = REQUEST_QUEUED;
928 rad_assert(request->proxy != NULL);
929 thread_pool_addrequest(request, virtual_server_handler);
931 #ifdef HAVE_PTHREAD_H
933 * MAY free the request if we're over max_request_time,
934 * AND we're not in threaded mode!
936 * Note that we call this ONLY if we're threaded, as
937 * if we're NOT threaded, request_post_handler() calls
938 * wait_a_bit(), which means that "request" may not
941 if (have_children) wait_a_bit(request);
946 static int setup_post_proxy_fail(REQUEST *request)
948 DICT_VALUE *dval = NULL;
951 request->child_state = REQUEST_RUNNING;
953 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
954 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-Authentication");
956 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
957 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-Accounting");
961 * See no_response_to_coa_request
963 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
964 request->packet->code &= 0xff; /* restore it */
966 if (request->proxy->code == PW_COA_REQUEST) {
967 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-CoA");
969 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
970 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-Disconnect");
980 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail");
983 pairdelete(&request->config_items, PW_POST_PROXY_TYPE, 0);
987 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE, 0);
988 if (!vp) vp = radius_paircreate(request, &request->config_items,
989 PW_POST_PROXY_TYPE, 0, PW_TYPE_INTEGER);
990 vp->vp_integer = dval->value;
992 rad_assert(request->proxy_reply == NULL);
998 static int null_handler(UNUSED REQUEST *request)
1003 static void post_proxy_fail_handler(REQUEST *request)
1006 * A proper time is required for wait_a_bit.
1008 request->delay = USEC / 10;
1009 gettimeofday(&now, NULL);
1012 * Not set up to run Post-Proxy-Type = Fail.
1014 * Mark the request as still running, and figure out what
1017 if (!setup_post_proxy_fail(request)) {
1018 request_post_handler(request);
1022 * Re-queue the request.
1024 request->child_state = REQUEST_QUEUED;
1027 * There is a post-proxy-type of fail. We run
1028 * the request through the pre/post proxy
1029 * handlers, just like it was a real proxied
1030 * request. However, we set the per-request
1031 * handler to NULL, as we don't want to do
1034 * Note that when we're not threaded, this will
1035 * process the request even if it's greater than
1036 * max_request_time. That's not fatal.
1038 request->priority = 0;
1039 rad_assert(request->proxy != NULL);
1040 thread_pool_addrequest(request, null_handler);
1044 * MAY free the request if we're over max_request_time,
1045 * AND we're not in threaded mode!
1047 * Note that we call this ONLY if we're threaded, as
1048 * if we're NOT threaded, request_post_handler() calls
1049 * wait_a_bit(), which means that "request" may not
1052 if (have_children) wait_a_bit(request);
1055 /* maybe check this against wait_for_proxy_id_to_expire? */
1056 static void no_response_to_proxied_request(void *ctx)
1058 REQUEST *request = ctx;
1062 rad_assert(request->magic == REQUEST_MAGIC);
1064 if (request->master_state == REQUEST_STOP_PROCESSING) {
1065 ev_request_free(&request);
1069 rad_assert(request->child_state == REQUEST_PROXIED);
1072 * If we've failed over to an internal home server,
1073 * replace the callback with the correct one. This
1074 * is due to locking issues with child threads...
1076 if (request->home_server->server) {
1077 wait_a_bit(request);
1082 if (request->home_server->proto != IPPROTO_TCP)
1084 check_for_zombie_home_server(request);
1086 home = request->home_server;
1089 * The default as of 2.1.7 is to allow requests to
1090 * fail-over to a backup home server when this one does
1091 * not respond. The old behavior can be configured as
1094 if (home->no_response_fail) {
1095 radlog_request(L_ERR, 0, request, "Rejecting request (proxy Id %d) due to lack of any response from home server %s port %d",
1097 inet_ntop(request->proxy->dst_ipaddr.af,
1098 &request->proxy->dst_ipaddr.ipaddr,
1099 buffer, sizeof(buffer)),
1100 request->proxy->dst_port);
1102 post_proxy_fail_handler(request);
1105 * Enforce max_request_time.
1107 * We fail over to another backup home server
1108 * when the client re-transmits the request. If
1109 * the client doesn't re-transmit, no fail-over
1112 rad_assert(request->ev == NULL);
1113 request->child_state = REQUEST_RUNNING;
1114 wait_a_bit(request);
1118 * Don't touch request due to race conditions
1123 * Do nothing more. The home server didn't respond,
1124 * but that isn't a catastrophic failure. Some home
1125 * servers don't respond to packets...
1127 if (home->proto == IPPROTO_TCP) {
1129 * FIXME: Set up TCP pinging on this connection.
1131 * Maybe the CONNECTION is dead, but the home
1132 * server is alive. In that case, we need to start
1133 * pinging on the connection.
1135 * This means doing the pinging BEFORE the
1136 * post_proxy_fail_handler above, as it may do
1137 * something with the request, and cause the
1138 * proxy listener to go away!
1144 if (home->state == HOME_STATE_IS_DEAD) {
1145 rad_assert(home->ev != NULL); /* or it will never wake up */
1150 * Enable the zombie period when we notice that the home
1151 * server hasn't responded. We do NOT back-date the start
1152 * of the zombie period.
1154 if (home->state == HOME_STATE_ALIVE) {
1155 home->state = HOME_STATE_ZOMBIE;
1156 home->zombie_period_start = now;
1157 fr_event_delete(el, &home->ev);
1158 home->currently_outstanding = 0;
1159 home->num_received_pings = 0;
1161 radlog(L_PROXY, "Marking home server %s port %d as zombie (it looks like it is dead).",
1162 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1163 buffer, sizeof(buffer)),
1167 * Start pinging the home server.
1169 ping_home_server(home);
1174 static void wait_a_bit(void *ctx)
1176 struct timeval when;
1177 REQUEST *request = ctx;
1178 fr_event_callback_t callback = NULL;
1180 rad_assert(request->magic == REQUEST_MAGIC);
1182 #ifdef HAVE_PTHREAD_H
1184 * The socket was closed. Tell the request that
1185 * there is no point in continuing.
1187 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1188 goto stop_processing;
1194 * The CoA request is a new (internally generated)
1195 * request, created in a child thread. We therefore need
1196 * some way to tie its events back into the main event
1199 if (request->coa && !request->coa->proxy_reply &&
1200 request->coa->next_callback) {
1201 request->coa->when = request->coa->next_when;
1202 INSERT_EVENT(request->coa->next_callback, request->coa);
1203 request->coa->next_callback = NULL;
1204 request->coa->parent = NULL;
1205 request->coa = NULL;
1209 switch (request->child_state) {
1210 case REQUEST_QUEUED:
1211 case REQUEST_RUNNING:
1213 * If we're not thread-capable, OR we're capable,
1214 * but have been told to run without threads,
1215 * complain when the requests is queued for a
1216 * thread, or running in a child thread.
1218 #ifdef HAVE_PTHREAD_H
1222 rad_assert("We do not have threads, but the request is marked as queued or running in a child thread" == NULL);
1226 #ifdef HAVE_PTHREAD_H
1228 * If we have threads, wait for the child thread
1231 when = request->received;
1232 when.tv_sec += request->root->max_request_time;
1235 * Normally called from the event loop with the
1236 * proper event loop time. Otherwise, called from
1237 * post proxy fail handler, which sets "now", and
1238 * this call won't re-set it, because we're not
1239 * in the event loop.
1241 fr_event_now(el, &now);
1244 * Request still has more time. Continue
1247 if (timercmp(&now, &when, <)) {
1248 if (request->delay < (USEC / 10)) {
1249 request->delay = USEC / 10;
1251 request->delay += request->delay >> 1;
1254 * Cap delays at something reasonable.
1256 if (request->delay > (request->root->max_request_time * USEC)) {
1257 request->delay = request->root->max_request_time * USEC;
1260 request->when = now;
1261 tv_add(&request->when, request->delay);
1262 callback = wait_a_bit;
1267 request->master_state = REQUEST_STOP_PROCESSING;
1270 * A child thread MAY still be running on the
1271 * request. Ask the thread to stop working on
1274 if (have_children &&
1275 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1276 radlog(L_ERR, "WARNING: Unresponsive child in module %s component %s",
1277 request->module ? request->module : "<server core>",
1278 request->component ? request->component : "<server core>");
1281 request->delay = USEC;
1282 tv_add(&request->when, request->delay);
1283 callback = wait_for_child_to_die;
1288 * Mark the request as no longer running,
1292 #ifdef HAVE_PTHREAD_H
1293 request->child_pid = NO_SUCH_CHILD_PID;
1298 * This is a CoA request. It's been divorced
1299 * from everything else, so we clean it up now.
1301 if (!request->in_request_hash &&
1303 (request->packet->code != request->proxy->code) &&
1304 ((request->proxy->code == PW_COA_REQUEST) ||
1305 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1307 * FIXME: Do CoA MIBs
1309 ev_request_free(&request);
1313 cleanup_delay(request);
1316 case REQUEST_REJECT_DELAY:
1317 case REQUEST_CLEANUP_DELAY:
1318 #ifdef HAVE_PTHREAD_H
1319 request->child_pid = NO_SUCH_CHILD_PID;
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: Discarding the request!");
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, 0);
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;
1481 home_server *home = request->home_server;
1482 rad_listen_t *listener = request->proxy_listener;
1485 * Don't free the old Id on error.
1487 if (!insert_into_proxy_hash(request)) {
1488 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1493 * Now that we have a new Id, free the old one
1494 * and update the various statistics.
1496 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1497 fr_packet_list_yank(proxy_list, &old);
1498 fr_packet_list_id_free(proxy_list, &old);
1499 if (home) home->currently_outstanding--;
1501 if (listener) listener->count--;
1503 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1505 } else { /* FIXME: protect by a mutex? */
1506 request->num_proxied_requests++;
1509 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1511 request->proxy_listener->send(request->proxy_listener,
1517 * The original request is either DONE, or in CLEANUP_DELAY.
1519 static int originated_coa_request(REQUEST *request)
1521 int delay, rcode, pre_proxy_type = 0;
1527 rad_assert(request->proxy == NULL);
1528 rad_assert(!request->in_proxy_hash);
1529 rad_assert(request->proxy_reply == NULL);
1532 * Check whether we want to originate one, or cancel one.
1534 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST, 0);
1535 if (!vp && request->coa) {
1536 vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST, 0);
1540 if (vp->vp_integer == 0) {
1541 ev_request_free(&request->coa);
1542 return 1; /* success */
1546 if (!request->coa) request_alloc_coa(request);
1547 if (!request->coa) return 0;
1552 * src_ipaddr will be set up in proxy_encode.
1554 memset(&ipaddr, 0, sizeof(ipaddr));
1555 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS, 0);
1557 ipaddr.af = AF_INET;
1558 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1560 } else if ((vp = pairfind(coa->proxy->vps,
1561 PW_PACKET_DST_IPV6_ADDRESS, 0)) != NULL) {
1562 ipaddr.af = AF_INET6;
1563 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1565 } else if ((vp = pairfind(coa->proxy->vps,
1566 PW_HOME_SERVER_POOL, 0)) != NULL) {
1567 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1569 if (!coa->home_pool) {
1570 RDEBUG2("WARNING: No such home_server_pool %s",
1573 ev_request_free(&request->coa);
1580 } else if (request->client->coa_pool) {
1581 coa->home_pool = request->client->coa_pool;
1583 } else if (request->client->coa_server) {
1584 coa->home_server = request->client->coa_server;
1588 * If all else fails, send it to the client that
1589 * originated this request.
1591 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1595 * Use the pool, if it exists.
1597 if (coa->home_pool) {
1598 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1599 if (!coa->home_server) {
1600 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1604 } else if (!coa->home_server) {
1605 int port = PW_COA_UDP_PORT;
1607 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT, 0);
1608 if (vp) port = vp->vp_integer;
1610 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1611 if (!coa->home_server) {
1612 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1613 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1614 buffer, sizeof(buffer)), port);
1619 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE, 0);
1621 switch (vp->vp_integer) {
1622 case PW_COA_REQUEST:
1623 case PW_DISCONNECT_REQUEST:
1624 coa->proxy->code = vp->vp_integer;
1628 DEBUG("Cannot set CoA Packet-Type to code %d",
1634 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1637 * The rest of the server code assumes that
1638 * request->packet && request->reply exist. Copy them
1639 * from the original request.
1641 rad_assert(coa->packet != NULL);
1642 rad_assert(coa->packet->vps == NULL);
1643 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1644 coa->packet->vps = paircopy(request->packet->vps);
1645 coa->packet->data = NULL;
1646 rad_assert(coa->reply != NULL);
1647 rad_assert(coa->reply->vps == NULL);
1648 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1649 coa->reply->vps = paircopy(request->reply->vps);
1650 coa->reply->data = NULL;
1651 coa->config_items = paircopy(request->config_items);
1654 * Call the pre-proxy routines.
1656 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE, 0);
1658 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1659 pre_proxy_type = vp->vp_integer;
1662 if (coa->home_pool && coa->home_pool->virtual_server) {
1663 const char *old_server = coa->server;
1665 coa->server = coa->home_pool->virtual_server;
1666 RDEBUG2(" server %s {", coa->server);
1667 rcode = module_pre_proxy(pre_proxy_type, coa);
1669 coa->server = old_server;
1671 rcode = module_pre_proxy(pre_proxy_type, coa);
1678 * Only send the CoA packet if the pre-proxy code succeeded.
1680 case RLM_MODULE_NOOP:
1682 case RLM_MODULE_UPDATED:
1687 * Source IP / port is set when the proxy socket
1690 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1691 coa->proxy->dst_port = coa->home_server->port;
1693 if (!insert_into_proxy_hash(coa)) {
1694 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1699 * We CANNOT divorce the CoA request from the parent
1700 * request. This function is running in a child thread,
1701 * and we need access to the main event loop in order to
1702 * to add the timers for the CoA packet. See
1707 * Forget about the original request completely at this
1712 gettimeofday(&request->proxy_when, NULL);
1713 request->received = request->next_when = request->proxy_when;
1714 rad_assert(request->proxy_reply == NULL);
1717 * Implement re-transmit algorithm as per RFC 5080
1720 * We want IRT + RAND*IRT
1721 * or 0.9 IRT + rand(0,.2) IRT
1723 * 2^20 ~ USEC, and we want 2.
1724 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1726 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1727 request->delay = delay * request->home_server->coa_irt;
1728 delay = request->home_server->coa_irt * USEC;
1729 delay -= delay / 10;
1730 delay += request->delay;
1732 request->delay = delay;
1733 tv_add(&request->next_when, delay);
1734 request->next_callback = retransmit_coa_request;
1737 * Note that we set proxied BEFORE sending the packet.
1739 * Once we send it, the request is tainted, as
1740 * another thread may have picked it up. Don't
1743 request->child_pid = NO_SUCH_CHILD_PID;
1745 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1747 request->child_state = REQUEST_PROXIED;
1749 DEBUG_PACKET(request, request->proxy, 1);
1751 request->proxy_listener->send(request->proxy_listener,
1755 #endif /* WITH_COA */
1758 static int process_proxy_reply(REQUEST *request)
1761 int post_proxy_type = 0;
1765 * Delete any reply we had accumulated until now.
1767 pairfree(&request->reply->vps);
1770 * Run the packet through the post-proxy stage,
1771 * BEFORE playing games with the attributes.
1773 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE, 0);
1775 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1776 post_proxy_type = vp->vp_integer;
1779 if (request->home_pool && request->home_pool->virtual_server) {
1780 const char *old_server = request->server;
1782 request->server = request->home_pool->virtual_server;
1783 RDEBUG2(" server %s {", request->server);
1784 rcode = module_post_proxy(post_proxy_type, request);
1786 request->server = old_server;
1788 rcode = module_post_proxy(post_proxy_type, request);
1792 if (request->packet->code == request->proxy->code)
1794 * Don't run the next bit if we originated a CoA
1795 * packet, after receiving an Access-Request or
1796 * Accounting-Request.
1801 * There may NOT be a proxy reply, as we may be
1802 * running Post-Proxy-Type = Fail.
1804 if (request->proxy_reply) {
1806 * Delete the Proxy-State Attributes from
1807 * the reply. These include Proxy-State
1808 * attributes from us and remote server.
1810 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE, 0);
1813 * Add the attributes left in the proxy
1814 * reply to the reply list.
1816 pairadd(&request->reply->vps, request->proxy_reply->vps);
1817 request->proxy_reply->vps = NULL;
1820 * Free proxy request pairs.
1822 pairfree(&request->proxy->vps);
1826 default: /* Don't do anything */
1828 case RLM_MODULE_FAIL:
1829 /* FIXME: debug print stuff */
1830 request->child_state = REQUEST_DONE;
1833 case RLM_MODULE_HANDLED:
1834 /* FIXME: debug print stuff */
1835 request->child_state = REQUEST_DONE;
1843 static int request_pre_handler(REQUEST *request)
1847 rad_assert(request->magic == REQUEST_MAGIC);
1848 rad_assert(request->packet != NULL);
1850 request->child_state = REQUEST_RUNNING;
1853 * Don't decode the packet if it's an internal "fake"
1854 * request. Instead, just return so that the caller can
1857 if (request->packet->dst_port == 0) {
1858 request->username = pairfind(request->packet->vps,
1860 request->password = pairfind(request->packet->vps,
1861 PW_USER_PASSWORD, 0);
1867 * Put the decoded packet into it's proper place.
1869 if (request->proxy_reply != NULL) {
1870 rcode = request->proxy_listener->decode(request->proxy_listener, request);
1871 DEBUG_PACKET(request, request->proxy_reply, 0);
1874 * Pro-actively remove it from the proxy hash.
1875 * This is later than in 2.1.x, but it means that
1876 * the replies are authenticated before being
1877 * removed from the hash.
1880 (request->num_proxied_requests <= request->num_proxied_responses)) {
1881 remove_from_proxy_hash(request);
1886 if (request->packet->vps == NULL) {
1887 rcode = request->listener->decode(request->listener, request);
1889 if (debug_condition) {
1891 const char *my_debug = debug_condition;
1894 * Ignore parse errors.
1896 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1900 request->options = 2;
1901 request->radlog = radlog_request;
1905 DEBUG_PACKET(request, request->packet, 0);
1911 RDEBUG("%s Dropping packet without response.", fr_strerror());
1912 request->reply->offset = -2; /* bad authenticator */
1913 request->child_state = REQUEST_DONE;
1917 if (!request->username) {
1918 request->username = pairfind(request->packet->vps,
1923 if (request->proxy) {
1924 return process_proxy_reply(request);
1934 * Do state handling when we proxy a request.
1936 static int proxy_request(REQUEST *request)
1938 struct timeval when;
1943 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
1944 ev_request_free(&request->coa);
1948 if (request->home_server->server) {
1949 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1953 if (!insert_into_proxy_hash(request)) {
1954 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1958 request->proxy_listener->encode(request->proxy_listener, request);
1960 when = request->received;
1961 when.tv_sec += request->root->max_request_time;
1963 gettimeofday(&request->proxy_when, NULL);
1965 request->next_when = request->proxy_when;
1966 request->next_when.tv_sec += request->home_server->response_window;
1968 rad_assert(request->home_server->response_window > 0);
1970 if (timercmp(&when, &request->next_when, <)) {
1971 request->next_when = when;
1973 request->next_callback = no_response_to_proxied_request;
1975 RDEBUG2("Proxying request to home server %s port %d",
1976 inet_ntop(request->proxy->dst_ipaddr.af,
1977 &request->proxy->dst_ipaddr.ipaddr,
1978 buffer, sizeof(buffer)),
1979 request->proxy->dst_port);
1982 * Note that we set proxied BEFORE sending the packet.
1984 * Once we send it, the request is tainted, as
1985 * another thread may have picked it up. Don't
1988 #ifdef HAVE_PTHREAD_H
1989 request->child_pid = NO_SUCH_CHILD_PID;
1991 request->child_state = REQUEST_PROXIED;
1993 DEBUG_PACKET(request, request->proxy, 1);
1995 request->proxy_listener->send(request->proxy_listener,
2002 * "Proxy" the request by sending it to a new virtual server.
2004 static int proxy_to_virtual_server(REQUEST *request)
2007 RAD_REQUEST_FUNP fun;
2009 if (!request->home_server || !request->home_server->server) return 0;
2011 if (request->parent) {
2012 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
2016 fake = request_alloc_fake(request);
2018 RDEBUG2("WARNING: Out of memory");
2022 fake->packet->vps = paircopy(request->proxy->vps);
2023 fake->server = request->home_server->server;
2025 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2026 fun = rad_authenticate;
2028 #ifdef WITH_ACCOUNTING
2029 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2030 fun = rad_accounting;
2034 RDEBUG2("Unknown packet type %d", request->proxy->code);
2035 ev_request_free(&fake);
2039 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2040 radius_handle_request(fake, fun);
2041 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2043 if (fake->reply->code != 0) {
2044 request->proxy_reply = fake->reply;
2048 * There was no response
2050 setup_post_proxy_fail(request);
2053 ev_request_free(&fake);
2055 process_proxy_reply(request);
2058 * Process it through the normal section again, but ONLY
2059 * if we received a proxy reply..
2061 if (request->proxy_reply) {
2062 if (request->server) RDEBUG("server %s {",
2063 request->server != NULL ?
2064 request->server : "");
2067 if (request->server) RDEBUG("} # server %s",
2068 request->server != NULL ?
2069 request->server : "");
2072 return 2; /* success, but NOT '1' !*/
2076 * Return 1 if we did proxy it, or the proxy attempt failed
2077 * completely. Either way, the caller doesn't touch the request
2078 * any more if we return 1.
2080 static int successfully_proxied_request(REQUEST *request)
2083 int pre_proxy_type = 0;
2084 VALUE_PAIR *realmpair;
2085 VALUE_PAIR *strippedname;
2087 char *realmname = NULL;
2089 REALM *realm = NULL;
2093 * If it was already proxied, do nothing.
2095 * FIXME: This should really be a serious error.
2097 if (request->in_proxy_hash ||
2098 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2102 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM, 0);
2103 if (!realmpair || (realmpair->length == 0)) {
2106 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL, 0);
2109 switch (request->packet->code) {
2110 case PW_AUTHENTICATION_REQUEST:
2111 pool_type = HOME_TYPE_AUTH;
2114 #ifdef WITH_ACCOUNTING
2115 case PW_ACCOUNTING_REQUEST:
2116 pool_type = HOME_TYPE_ACCT;
2121 case PW_COA_REQUEST:
2122 case PW_DISCONNECT_REQUEST:
2123 pool_type = HOME_TYPE_COA;
2131 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2133 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2138 realmname = NULL; /* no realms */
2143 realmname = (char *) realmpair->vp_strvalue;
2145 realm = realm_find2(realmname);
2147 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2152 * Figure out which pool to use.
2154 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2155 pool = realm->auth_pool;
2157 #ifdef WITH_ACCOUNTING
2158 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2159 pool = realm->acct_pool;
2163 } else if ((request->packet->code == PW_COA_REQUEST) ||
2164 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2165 pool = realm->acct_pool;
2169 rad_panic("Internal sanity check failed");
2173 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2179 home = home_server_ldb(realmname, pool, request);
2181 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2185 request->home_pool = pool;
2189 * Once we've decided to proxy a request, we cannot send
2190 * a CoA packet. So we free up any CoA packet here.
2192 ev_request_free(&request->coa);
2195 * Remember that we sent the request to a Realm.
2197 if (realmname) pairadd(&request->packet->vps,
2198 pairmake("Realm", realmname, T_OP_EQ));
2201 * Strip the name, if told to.
2203 * Doing it here catches the case of proxied tunneled
2206 if (realm && (realm->striprealm == TRUE) &&
2207 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME, 0)) != NULL) {
2209 * If there's a Stripped-User-Name attribute in
2210 * the request, then use THAT as the User-Name
2211 * for the proxied request, instead of the
2214 * This is done by making a copy of the
2215 * Stripped-User-Name attribute, turning it into
2216 * a User-Name attribute, deleting the
2217 * Stripped-User-Name and User-Name attributes
2218 * from the vps list, and making the new
2219 * User-Name the head of the vps list.
2221 vp = pairfind(request->proxy->vps, PW_USER_NAME, 0);
2223 vp = radius_paircreate(request, NULL,
2224 PW_USER_NAME, 0, PW_TYPE_STRING);
2225 rad_assert(vp != NULL); /* handled by above function */
2226 /* Insert at the START of the list */
2227 vp->next = request->proxy->vps;
2228 request->proxy->vps = vp;
2230 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2231 sizeof(vp->vp_strvalue));
2232 vp->length = strippedname->length;
2235 * Do NOT delete Stripped-User-Name.
2240 * If there is no PW_CHAP_CHALLENGE attribute but
2241 * there is a PW_CHAP_PASSWORD we need to add it
2242 * since we can't use the request authenticator
2243 * anymore - we changed it.
2245 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2246 pairfind(request->proxy->vps, PW_CHAP_PASSWORD, 0) &&
2247 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE, 0) == NULL) {
2248 vp = radius_paircreate(request, &request->proxy->vps,
2249 PW_CHAP_CHALLENGE, 0, PW_TYPE_OCTETS);
2250 vp->length = AUTH_VECTOR_LEN;
2251 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2255 * The RFC's say we have to do this, but FreeRADIUS
2258 vp = radius_paircreate(request, &request->proxy->vps,
2259 PW_PROXY_STATE, 0, PW_TYPE_OCTETS);
2260 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2261 request->packet->id);
2262 vp->length = strlen(vp->vp_strvalue);
2265 * Should be done BEFORE inserting into proxy hash, as
2266 * pre-proxy may use this information, or change it.
2268 request->proxy->code = request->packet->code;
2271 * Call the pre-proxy routines.
2273 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE, 0);
2275 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2276 pre_proxy_type = vp->vp_integer;
2279 rad_assert(request->home_pool != NULL);
2281 if (request->home_pool->virtual_server) {
2282 const char *old_server = request->server;
2284 request->server = request->home_pool->virtual_server;
2285 RDEBUG2(" server %s {", request->server);
2286 rcode = module_pre_proxy(pre_proxy_type, request);
2288 request->server = old_server;
2290 rcode = module_pre_proxy(pre_proxy_type, request);
2293 case RLM_MODULE_FAIL:
2294 case RLM_MODULE_INVALID:
2295 case RLM_MODULE_NOTFOUND:
2296 case RLM_MODULE_USERLOCK:
2298 /* FIXME: debug print failed stuff */
2301 case RLM_MODULE_REJECT:
2302 case RLM_MODULE_HANDLED:
2306 * Only proxy the packet if the pre-proxy code succeeded.
2308 case RLM_MODULE_NOOP:
2310 case RLM_MODULE_UPDATED:
2315 * If it's a fake request, don't send the proxy
2316 * packet. The outer tunnel session will take
2317 * care of doing that.
2319 if (request->packet->dst_port == 0) {
2320 request->home_server = NULL;
2324 if (request->home_server->server) {
2325 return proxy_to_virtual_server(request);
2328 if (!proxy_request(request)) {
2329 RDEBUG("ERROR: Failed to proxy request");
2337 static void request_post_handler(REQUEST *request)
2339 int child_state = -1;
2340 struct timeval when;
2343 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2345 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2346 RDEBUG2("request was cancelled.");
2347 #ifdef HAVE_PTHREAD_H
2348 request->child_pid = NO_SUCH_CHILD_PID;
2350 child_state = REQUEST_DONE;
2354 if (request->child_state != REQUEST_RUNNING) {
2355 rad_panic("Internal sanity check failed");
2360 * If it's not in the request hash, it's a CoA request.
2363 if (!request->in_request_hash &&
2365 ((request->proxy->code == PW_COA_REQUEST) ||
2366 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2367 request->next_callback = NULL;
2368 child_state = REQUEST_DONE;
2374 * Catch Auth-Type := Reject BEFORE proxying the packet.
2376 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2377 (request->reply->code == 0) &&
2378 ((vp = pairfind(request->config_items, PW_AUTH_TYPE, 0)) != NULL) &&
2379 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2380 request->reply->code = PW_AUTHENTICATION_REJECT;
2384 if (request->root->proxy_requests &&
2385 !request->in_proxy_hash &&
2386 (request->reply->code == 0) &&
2387 (request->packet->dst_port != 0) &&
2388 (request->packet->code != PW_STATUS_SERVER)) {
2389 int rcode = successfully_proxied_request(request);
2391 if (rcode == 1) return; /* request is invalid */
2394 * Failed proxying it (dead home servers, etc.)
2395 * Run it through Post-Proxy-Type = Fail, and
2396 * respond to the request.
2398 * Note that we're in a child thread here, so we
2399 * do NOT re-schedule the request. Instead, we
2400 * do what we would have done, which is run the
2401 * pre-handler, a NULL request handler, and then
2404 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2405 request_pre_handler(request);
2409 * Else we weren't supposed to proxy it,
2410 * OR we proxied it internally to a virutal server.
2415 else if (request->proxy && request->coa) {
2416 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
2417 ev_request_free(&request->coa);
2423 * Fake requests don't get encoded or signed. The caller
2424 * also requires the reply VP's, so we don't free them
2427 if (request->packet->dst_port == 0) {
2428 /* FIXME: RDEBUG going to the next request */
2429 #ifdef HAVE_PTHREAD_H
2430 request->child_pid = NO_SUCH_CHILD_PID;
2432 request->child_state = REQUEST_DONE;
2438 * Copy Proxy-State from the request to the reply.
2440 vp = paircopy2(request->packet->vps, PW_PROXY_STATE, 0);
2441 if (vp) pairadd(&request->reply->vps, vp);
2445 * Access-Requests get delayed or cached.
2447 switch (request->packet->code) {
2448 case PW_AUTHENTICATION_REQUEST:
2449 gettimeofday(&request->next_when, NULL);
2451 if (request->reply->code == 0) {
2453 * Check if the lack of response is intentional.
2455 vp = pairfind(request->config_items,
2456 PW_RESPONSE_PACKET_TYPE, 0);
2458 RDEBUG2("There was no response configured: rejecting request");
2459 request->reply->code = PW_AUTHENTICATION_REJECT;
2461 } else if (vp->vp_integer == 256) {
2462 RDEBUG2("Not responding to request");
2465 * Force cleanup after a long
2466 * time, so that we don't
2467 * re-process the packet.
2469 request->next_when.tv_sec += request->root->max_request_time;
2470 request->next_callback = cleanup_delay;
2471 child_state = REQUEST_CLEANUP_DELAY;
2474 request->reply->code = vp->vp_integer;
2480 * Run rejected packets through
2482 * Post-Auth-Type = Reject
2484 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2485 pairdelete(&request->config_items, PW_POST_AUTH_TYPE, 0);
2486 vp = radius_pairmake(request, &request->config_items,
2487 "Post-Auth-Type", "Reject",
2489 if (vp) rad_postauth(request);
2492 * If configured, delay Access-Reject packets.
2494 * If request->root->reject_delay = 0, we discover
2495 * that we have to send the packet now.
2497 when = request->received;
2498 when.tv_sec += request->root->reject_delay;
2500 if (timercmp(&when, &request->next_when, >)) {
2501 RDEBUG2("Delaying reject for %d seconds",
2502 request->root->reject_delay);
2503 request->next_when = when;
2504 request->next_callback = reject_delay;
2505 #ifdef HAVE_PTHREAD_H
2506 request->child_pid = NO_SUCH_CHILD_PID;
2508 request->child_state = REQUEST_REJECT_DELAY;
2514 case PW_COA_REQUEST:
2515 case PW_DISCONNECT_REQUEST:
2517 request->next_when.tv_sec += request->root->cleanup_delay;
2518 request->next_callback = cleanup_delay;
2519 child_state = REQUEST_CLEANUP_DELAY;
2522 case PW_ACCOUNTING_REQUEST:
2523 request->next_callback = NULL; /* just to be safe */
2524 child_state = REQUEST_DONE;
2528 * FIXME: Status-Server should probably not be
2531 case PW_STATUS_SERVER:
2532 request->next_callback = NULL;
2533 child_state = REQUEST_DONE;
2540 request->next_callback = NULL;
2541 child_state = REQUEST_DONE;
2546 * Suppress "no reply" packets here, unless we're reading
2547 * from the "detail" file. In that case, we've got to
2548 * tell the detail file handler that the request is dead,
2549 * and it should re-send it.
2550 * If configured, encode, sign, and send.
2552 if ((request->reply->code != 0) ||
2553 (request->listener->type == RAD_LISTEN_DETAIL)) {
2554 DEBUG_PACKET(request, request->reply, 1);
2555 request->listener->send(request->listener, request);
2560 * Now that we've completely processed the request,
2561 * see if we need to originate a CoA request. But ONLY
2562 * if it wasn't proxied.
2564 if (!request->proxy &&
2565 (request->packet->code != PW_COA_REQUEST) &&
2566 (request->packet->code != PW_DISCONNECT_REQUEST) &&
2568 (pairfind(request->config_items, PW_SEND_COA_REQUEST, 0) != NULL))) {
2569 if (!originated_coa_request(request)) {
2570 RDEBUG2("Do CoA Fail handler here");
2572 /* request->coa is stil set, so we can update events */
2578 * Clean up. These are no longer needed.
2580 pairfree(&request->config_items);
2582 pairfree(&request->packet->vps);
2583 request->username = NULL;
2584 request->password = NULL;
2586 pairfree(&request->reply->vps);
2589 if (request->proxy) {
2590 pairfree(&request->proxy->vps);
2592 if (request->proxy_reply) {
2593 pairfree(&request->proxy_reply->vps);
2598 * We're not tracking responses from the home
2599 * server, we can therefore free this memory in
2602 if (!request->in_proxy_hash) {
2603 rad_free(&request->proxy);
2604 rad_free(&request->proxy_reply);
2605 request->home_server = NULL;
2611 RDEBUG2("Finished request.");
2612 rad_assert(child_state >= 0);
2613 request->child_state = child_state;
2616 * Single threaded mode: update timers now.
2618 if (!have_children) wait_a_bit(request);
2622 static void rad_retransmit_packet(REQUEST *request)
2627 if (request->home_server->proto == IPPROTO_TCP) {
2628 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2629 inet_ntop(request->proxy->dst_ipaddr.af,
2630 &request->proxy->dst_ipaddr.ipaddr,
2631 buffer, sizeof(buffer)),
2632 request->proxy->dst_port,
2633 request->proxy->id);
2634 return; /* don't do anything else */
2638 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2639 inet_ntop(request->proxy->dst_ipaddr.af,
2640 &request->proxy->dst_ipaddr.ipaddr,
2641 buffer, sizeof(buffer)),
2642 request->proxy->dst_port,
2643 request->proxy->id);
2644 request->num_proxied_requests++;
2646 DEBUG_PACKET(request, request->proxy, 1);
2647 request->proxy_listener->send(request->proxy_listener,
2652 static int rad_retransmit(REQUEST *request)
2655 * If we've just discovered that the home server
2656 * is dead, OR the socket has been closed, look for
2657 * another connection to a home server.
2659 if ((request->home_server->state == HOME_STATE_IS_DEAD) ||
2660 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2663 remove_from_proxy_hash(request);
2665 home = home_server_ldb(NULL, request->home_pool, request);
2667 RDEBUG2("Failed to find live home server for request");
2670 * Do post-request processing,
2671 * and any insertion of necessary
2674 post_proxy_fail_handler(request);
2678 request->proxy->code = request->packet->code;
2681 * Free the old packet, to force re-encoding
2683 free(request->proxy->data);
2684 request->proxy->data = NULL;
2685 request->proxy->data_len = 0;
2688 * This request failed over to a virtual
2689 * server. Push it back onto the queue
2692 if (request->home_server->server) {
2693 proxy_fallback_handler(request);
2698 * Try to proxy the request.
2700 if (!proxy_request(request)) {
2701 RDEBUG("ERROR: Failed to re-proxy request");
2702 goto no_home_servers;
2705 } /* else the home server is still alive */
2707 rad_retransmit_packet(request);
2713 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2716 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2717 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2719 switch (request->child_state) {
2720 case REQUEST_QUEUED:
2721 case REQUEST_RUNNING:
2725 radlog(L_ERR, "Discarding duplicate request from "
2726 "client %s port %d - ID: %d due to unfinished request %u",
2728 request->packet->src_port,request->packet->id,
2733 case REQUEST_PROXIED:
2735 * We're not supposed to have duplicate
2736 * accounting packets. The other states handle
2737 * duplicates fine (discard, or send duplicate
2738 * reply). But we do NOT want to retransmit an
2739 * accounting request here, because that would
2740 * involve updating the Acct-Delay-Time, and
2741 * therefore changing the packet Id, etc.
2743 * Instead, we just discard the packet. We may
2744 * eventually respond, or the client will send a
2745 * new accounting packet.
2747 * The same comments go for Status-Server, and
2748 * other packet types.
2750 * FIXME: coa: when we proxy CoA && Disconnect
2751 * packets, this logic has to be fixed.
2753 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2757 check_for_zombie_home_server(request);
2760 * Home server is still alive, and the proxy
2761 * socket is OK. Just re-send the packet.
2763 if ((request->home_server->state != HOME_STATE_IS_DEAD) &&
2764 (request->proxy_listener->status == RAD_LISTEN_STATUS_KNOWN)) {
2765 rad_retransmit_packet(request);
2770 * Otherwise, we need to fail over to another
2771 * home server, and possibly run "post-proxy-type
2772 * fail". Add an event waiting for the child to
2775 INSERT_EVENT(wait_a_bit, request);
2777 request->priority = RAD_LISTEN_PROXY;
2778 thread_pool_addrequest(request, rad_retransmit);
2782 case REQUEST_REJECT_DELAY:
2783 RDEBUG2("Waiting to send Access-Reject "
2784 "to client %s port %d - ID: %d",
2786 request->packet->src_port, request->packet->id);
2789 case REQUEST_CLEANUP_DELAY:
2791 if (request->reply->code == 0) {
2792 RDEBUG2("Ignoring retransmit from client %s port %d "
2793 "- ID: %d, no reply was configured",
2795 request->packet->src_port, request->packet->id);
2800 * FIXME: This sends duplicate replies to
2801 * accounting requests, even if Acct-Delay-Time
2802 * or Event-Timestamp is in the packet. In those
2803 * cases, the Id should be changed, and the packet
2806 RDEBUG2("Sending duplicate reply "
2807 "to client %s port %d - ID: %d",
2809 request->packet->src_port, request->packet->id);
2810 DEBUG_PACKET(request, request->reply, 1);
2811 request->listener->send(request->listener, request);
2817 static void received_conflicting_request(REQUEST *request,
2818 const RADCLIENT *client)
2820 radlog(L_ERR, "Received conflicting packet from "
2821 "client %s port %d - ID: %d due to unfinished request %u. Giving up on old request.",
2823 request->packet->src_port, request->packet->id,
2827 * Nuke it from the request hash, so we can receive new
2830 remove_from_request_hash(request);
2832 switch (request->child_state) {
2834 * Tell it to stop, and wait for it to do so.
2837 request->master_state = REQUEST_STOP_PROCESSING;
2838 request->delay += request->delay >> 1;
2840 tv_add(&request->when, request->delay);
2842 INSERT_EVENT(wait_for_child_to_die, request);
2846 * Catch race conditions. It may have switched
2847 * from running to done while this code is being
2850 case REQUEST_REJECT_DELAY:
2851 case REQUEST_CLEANUP_DELAY:
2858 static int can_handle_new_request(RADIUS_PACKET *packet,
2860 struct main_config_t *root)
2863 * Count the total number of requests, to see if
2864 * there are too many. If so, return with an
2867 if (root->max_requests) {
2868 int request_count = fr_packet_list_num_elements(pl);
2871 * This is a new request. Let's see if
2872 * it makes us go over our configured
2875 if (request_count > root->max_requests) {
2876 radlog(L_ERR, "Dropping request (%d is too many): "
2877 "from client %s port %d - ID: %d", request_count,
2879 packet->src_port, packet->id);
2880 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2881 "\tThe value for 'max_requests' is probably set too low.\n");
2883 } /* else there were a small number of requests */
2884 } /* else there was no configured limit for requests */
2887 * FIXME: Add per-client checks. If one client is sending
2888 * too many packets, start discarding them.
2890 * We increment the counters here, and decrement them
2891 * when the response is sent... somewhere in this file.
2895 * FUTURE: Add checks for system load. If the system is
2896 * busy, start dropping requests...
2898 * We can probably keep some statistics ourselves... if
2899 * there are more requests coming in than we can handle,
2900 * start dropping some.
2907 int received_request(rad_listen_t *listener,
2908 RADIUS_PACKET *packet, REQUEST **prequest,
2911 RADIUS_PACKET **packet_p;
2912 REQUEST *request = NULL;
2913 struct main_config_t *root = &mainconfig;
2915 packet_p = fr_packet_list_find(pl, packet);
2917 request = fr_packet2myptr(REQUEST, packet, packet_p);
2918 rad_assert(request->in_request_hash);
2920 if ((request->packet->data_len == packet->data_len) &&
2921 (memcmp(request->packet->vector, packet->vector,
2922 sizeof(packet->vector)) == 0)) {
2923 received_retransmit(request, client);
2928 * The new request is different from the old one,
2929 * but maybe the old is finished. If so, delete
2932 switch (request->child_state) {
2933 struct timeval when;
2937 * Special hacks for race conditions.
2938 * The reply is encoded, and therefore
2939 * likely sent. We received a *new*
2940 * packet from the client, likely before
2941 * the next line or two of code which
2942 * updated the child state. In this
2943 * case, just accept the new request.
2945 if ((request->reply->code != 0) &&
2946 request->reply->data) {
2947 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %u.",
2949 packet->src_port, packet->id,
2951 remove_from_request_hash(request);
2956 gettimeofday(&when, NULL);
2960 * If the cached request was received
2961 * within the last second, then we
2962 * discard the NEW request instead of the
2963 * old one. This will happen ONLY when
2964 * the client is severely broken, and is
2965 * sending conflicting packets very
2968 if (timercmp(&when, &request->received, <)) {
2969 radlog(L_ERR, "Discarding conflicting packet from "
2970 "client %s port %d - ID: %d due to recent request %u.",
2972 packet->src_port, packet->id,
2977 received_conflicting_request(request, client);
2981 case REQUEST_REJECT_DELAY:
2982 case REQUEST_CLEANUP_DELAY:
2983 request->child_state = REQUEST_DONE;
2985 cleanup_delay(request);
2992 * We may want to quench the new request.
2994 if ((listener->type != RAD_LISTEN_DETAIL) &&
2995 !can_handle_new_request(packet, client, root)) {
3000 * Create and initialize the new request.
3002 request = request_alloc(); /* never fails */
3004 if ((request->reply = rad_alloc(0)) == NULL) {
3005 radlog(L_ERR, "No memory");
3009 request->listener = listener;
3010 request->client = client;
3011 request->packet = packet;
3012 request->packet->timestamp = request->timestamp;
3013 request->number = request_num_counter++;
3014 request->priority = listener->type;
3015 #ifdef HAVE_PTHREAD_H
3016 request->child_pid = NO_SUCH_CHILD_PID;
3020 * Status-Server packets go to the head of the queue.
3022 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
3025 * Set virtual server identity
3027 if (client->server) {
3028 request->server = client->server;
3029 } else if (listener->server) {
3030 request->server = listener->server;
3032 request->server = NULL;
3036 * Remember the request in the list.
3038 if (!fr_packet_list_insert(pl, &request->packet)) {
3039 radlog(L_ERR, "Failed to insert request %u in the list of live requests: discarding", request->number);
3040 ev_request_free(&request);
3044 request->in_request_hash = TRUE;
3045 request->root = root;
3048 request->listener->count++;
3052 * The request passes many of our sanity checks.
3053 * From here on in, if anything goes wrong, we
3054 * send a reject message, instead of dropping the
3059 * Build the reply template from the request.
3062 request->reply->sockfd = request->packet->sockfd;
3063 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3064 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3065 request->reply->dst_port = request->packet->src_port;
3066 request->reply->src_port = request->packet->dst_port;
3067 request->reply->id = request->packet->id;
3068 request->reply->code = 0; /* UNKNOWN code */
3069 memcpy(request->reply->vector, request->packet->vector,
3070 sizeof(request->reply->vector));
3071 request->reply->vps = NULL;
3072 request->reply->data = NULL;
3073 request->reply->data_len = 0;
3075 request->master_state = REQUEST_ACTIVE;
3076 request->child_state = REQUEST_QUEUED;
3077 request->next_callback = NULL;
3079 gettimeofday(&request->received, NULL);
3080 request->timestamp = request->received.tv_sec;
3081 request->when = request->received;
3083 request->delay = USEC;
3085 tv_add(&request->when, request->delay);
3087 INSERT_EVENT(wait_a_bit, request);
3089 *prequest = request;
3095 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3101 * Lookup *without* removal. In versions prior to 2.2.0,
3102 * this did lookup *and* removal. That method allowed
3103 * attackers to spoof replies that caused entries to be
3104 * removed from the proxy hash prior to validation.
3106 request = lookup_in_proxy_hash(packet);
3109 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3110 inet_ntop(packet->src_ipaddr.af,
3111 &packet->src_ipaddr.ipaddr,
3112 buffer, sizeof(buffer)),
3113 packet->src_port, packet->id);
3118 * There's a reply: discard it if it's a conflicting one.
3120 if (request->proxy_reply) {
3122 * ? The home server gave us a new proxy
3123 * reply which doesn't match the old
3126 if (memcmp(request->proxy_reply->vector,
3128 sizeof(request->proxy_reply->vector)) != 0) {
3129 RDEBUG2("Ignoring conflicting proxy reply");
3132 /* assert that there's an event queued for request? */
3134 } /* else it had previously passed verification */
3137 * Verify the packet before doing ANYTHING with
3138 * it. This means we're doing more MD5 checks in
3139 * the server core. However, we can fix that by
3140 * moving to multiple threads listening on
3143 * We do this AFTER looking the request up in the
3144 * hash, and AFTER checking if we saw a previous
3145 * request. This helps minimize the DoS effect
3146 * of people attacking us with spoofed packets.
3148 * FIXME: move the "read from proxy socket" code
3149 * into one (or more) threads. Have it read from
3150 * the socket, do the validation, and write a
3151 * pointer to the packet into a pipe? Or queue it
3152 * to the main server?
3154 } else if (rad_verify(packet, request->proxy,
3155 request->home_server->secret) != 0) {
3156 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3161 * Check (again) if it's a duplicate reply. We do this
3162 * after deleting the packet from the proxy hash.
3164 if (request->proxy_reply) {
3165 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d",
3166 inet_ntop(packet->src_ipaddr.af,
3167 &packet->src_ipaddr.ipaddr,
3168 buffer, sizeof(buffer)),
3169 packet->src_port, packet->id);
3172 gettimeofday(&now, NULL);
3175 * "ping" packets have a different algorithm for marking
3176 * a home server alive. They also skip all of the CoA,
3179 if (!request->packet) {
3180 request->proxy_reply = packet;
3182 rad_assert(request->home_server != NULL);
3183 if (request->home_server->proto != IPPROTO_TCP)
3185 received_response_to_ping(request);
3186 request->proxy_reply = NULL; /* caller will free it */
3187 ev_request_free(&request);
3192 * Maybe move this earlier in the decision process?
3193 * Having it here means that late or duplicate proxy
3194 * replies no longer get the home server marked as
3195 * "alive". This might be good for stability, though.
3197 * FIXME: Do we really want to do this whenever we
3198 * receive a packet? Setting this here means that we
3199 * mark it alive on *any* packet, even if it's lost all
3200 * of the *other* packets in the last 10s.
3202 request->home_server->state = HOME_STATE_ALIVE;
3206 * When originating CoA, the "proxy" reply is the reply
3207 * to the CoA request that we originated. At this point,
3208 * the original request is finished, and it has a reply.
3210 * However, if we haven't separated the two requests, do
3211 * so now. This is done so that cleaning up the original
3212 * request won't cause the CoA request to be free'd. See
3213 * util.c, request_free()
3215 if (request->parent && (request->parent->coa == request)) {
3216 request->parent->coa = NULL;
3217 request->parent = NULL;
3220 * The proxied packet was different from the
3221 * original packet, AND the proxied packet was
3224 } else if ((request->packet->code != request->proxy->code) &&
3225 ((request->proxy->code == PW_COA_REQUEST) ||
3226 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
3228 * It's already divorced: do nothing.
3233 * Skip the next set of checks, as the original
3234 * reply is cached. We want to be able to still
3235 * process the CoA reply, AND to reference the
3236 * original request/reply.
3238 * This is getting to be really quite a bit of a
3244 * If there's a reply to the NAS, ignore everything
3245 * related to proxy responses
3247 if (request->reply && request->reply->code != 0) {
3248 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3254 * The average includes our time to receive packets and
3255 * look them up in the hashes, which should be the same
3258 * We update the response time only for the FIRST packet
3261 if (request->home_server->ema.window > 0) {
3262 radius_stats_ema(&request->home_server->ema,
3263 &now, &request->proxy_when);
3267 switch (request->child_state) {
3268 case REQUEST_QUEUED:
3269 case REQUEST_RUNNING:
3270 radlog(L_ERR, "Internal sanity check failed for child state");
3273 case REQUEST_REJECT_DELAY:
3274 case REQUEST_CLEANUP_DELAY:
3276 radlog(L_ERR, "Reply from home server %s port %d - ID: %d arrived too late for request %u. Try increasing 'retry_delay' or 'max_request_time'",
3277 inet_ntop(packet->src_ipaddr.af,
3278 &packet->src_ipaddr.ipaddr,
3279 buffer, sizeof(buffer)),
3280 packet->src_port, packet->id,
3282 /* assert that there's an event queued for request? */
3285 case REQUEST_PROXIED:
3289 request->proxy_reply = packet;
3293 * Perform RTT calculations, as per RFC 2988 (for TCP).
3294 * Note that we only do so on the first response.
3296 if ((request->num_proxied_responses == 1)
3298 home_server *home = request->home_server;
3300 rtt = now.tv_sec - request->proxy_when.tv_sec;
3303 rtt -= request->proxy_when.tv_usec;
3305 if (!home->has_rtt) {
3306 home->has_rtt = TRUE;
3309 home->rttvar = rtt / 2;
3312 home->rttvar -= home->rttvar >> 2;
3313 home->rttvar += (home->srtt - rtt);
3314 home->srtt -= home->srtt >> 3;
3315 home->srtt += rtt >> 3;
3318 home->rto = home->srtt;
3319 if (home->rttvar > (USEC / 4)) {
3320 home->rto += home->rttvar * 4;
3327 request->child_state = REQUEST_QUEUED;
3328 request->when = now;
3329 request->delay = USEC;
3330 request->priority = RAD_LISTEN_PROXY;
3331 tv_add(&request->when, request->delay);
3334 * Wait a bit will take care of max_request_time
3336 INSERT_EVENT(wait_a_bit, request);
3341 #endif /* WITH_PROXY */
3344 static void tcp_socket_lifetime(void *ctx)
3346 rad_listen_t *listener = ctx;
3349 listener->print(listener, buffer, sizeof(buffer));
3351 DEBUG("Reached maximum lifetime on socket %s", buffer);
3353 listener->status = RAD_LISTEN_STATUS_CLOSED;
3354 event_new_fd(listener);
3357 static void tcp_socket_idle_timeout(void *ctx)
3359 rad_listen_t *listener = ctx;
3360 listen_socket_t *sock = listener->data;
3363 fr_event_now(el, &now); /* should always succeed... */
3365 rad_assert(sock->home != NULL);
3368 * We implement idle timeout by polling, because it's
3369 * cheaper than resetting the idle timeout every time
3370 * we send / receive a packet.
3372 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3373 struct timeval when;
3374 void *fun = tcp_socket_idle_timeout;
3376 when.tv_sec = sock->last_packet;
3377 when.tv_sec += sock->home->idle_timeout;
3380 if (sock->home->lifetime &&
3381 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3382 when.tv_sec = sock->opened + sock->home->lifetime;
3383 fun = tcp_socket_lifetime;
3386 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3387 rad_panic("Failed to insert event");
3393 listener->print(listener, buffer, sizeof(buffer));
3395 DEBUG("Reached idle timeout on socket %s", buffer);
3397 listener->status = RAD_LISTEN_STATUS_CLOSED;
3398 event_new_fd(listener);
3402 int event_new_fd(rad_listen_t *this)
3406 if (this->status == RAD_LISTEN_STATUS_KNOWN) return 1;
3408 this->print(this, buffer, sizeof(buffer));
3410 if (this->status == RAD_LISTEN_STATUS_INIT) {
3412 DEBUG("Listening on %s", buffer);
3414 radlog(L_INFO, " ... adding new socket %s", buffer);
3419 * Add it to the list of sockets we can use.
3420 * Server sockets (i.e. auth/acct) are never
3421 * added to the packet list.
3423 if (this->type == RAD_LISTEN_PROXY) {
3424 listen_socket_t *sock = this->data;
3426 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3427 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3429 &sock->other_ipaddr, sock->other_port,
3432 proxy_no_new_sockets = TRUE;
3433 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3436 * This is bad. However, the
3437 * packet list now supports 256
3438 * open sockets, which should
3439 * minimize this problem.
3441 radlog(L_ERR, "Failed adding proxy socket: %s",
3447 sock->home->num_connections++;
3450 * If necessary, add it to the list of
3451 * new proxy listeners.
3453 if (sock->home->lifetime || sock->home->idle_timeout) {
3454 this->next = proxy_listener_list;
3455 proxy_listener_list = this;
3458 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3461 * Tell the main thread that we've added
3462 * a proxy listener, but only if we need
3463 * to update the event list. Do this
3464 * with the mutex unlocked, to reduce
3468 if (sock->home->lifetime || sock->home->idle_timeout) {
3469 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3477 * Detail files are always known, and aren't
3478 * put into the socket event loop.
3480 if (this->type == RAD_LISTEN_DETAIL) {
3481 this->status = RAD_LISTEN_STATUS_KNOWN;
3484 * Set up the first poll interval.
3486 event_poll_detail(this);
3491 FD_MUTEX_LOCK(&fd_mutex);
3492 if (!fr_event_fd_insert(el, 0, this->fd,
3493 event_socket_handler, this)) {
3494 radlog(L_ERR, "Failed adding event handler for proxy socket!");
3497 FD_MUTEX_UNLOCK(&fd_mutex);
3499 this->status = RAD_LISTEN_STATUS_KNOWN;
3504 * Something went wrong with the socket: make it harmless.
3506 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3510 * Remove it from the list of live FD's.
3512 FD_MUTEX_LOCK(&fd_mutex);
3513 fr_event_fd_delete(el, 0, this->fd);
3514 FD_MUTEX_UNLOCK(&fd_mutex);
3518 * We track requests using this socket only for
3519 * TCP. For UDP, we don't currently close
3523 if (this->type != RAD_LISTEN_PROXY)
3526 if (this->count != 0) {
3527 fr_packet_list_walk(pl, this,
3528 remove_all_requests);
3531 if (this->count == 0) {
3532 this->status = RAD_LISTEN_STATUS_FINISH;
3538 int count = this->count;
3543 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3544 if (!fr_packet_list_socket_freeze(proxy_list,
3546 radlog(L_ERR, "Fatal error freezing socket: %s",
3552 * Doing this with the proxy mutex held
3553 * is a Bad Thing. We should move to
3554 * finer-grained mutexes.
3556 count = this->count;
3558 fr_packet_list_walk(proxy_list, this,
3559 remove_all_proxied_requests);
3561 count = this->count; /* protected by mutex */
3562 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3565 this->status = RAD_LISTEN_STATUS_FINISH;
3569 #endif /* WITH_PROXY */
3570 #endif /* WITH_TCP */
3573 * Re-open the socket, pointing it to /dev/null.
3574 * This means that all writes proceed without
3575 * blocking, and all reads return "no data".
3577 * This leaves the socket active, so any child
3578 * threads won't go insane. But it means that
3579 * they cannot send or receive any packets.
3581 * This is EXTRA work in the normal case, when
3582 * sockets are closed without error. But it lets
3583 * us have one simple processing method for all
3586 devnull = open("/dev/null", O_RDWR);
3588 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3592 if (dup2(devnull, this->fd) < 0) {
3593 radlog(L_ERR, "FATAL failure closing socket: %s",
3599 this->status = RAD_LISTEN_STATUS_CLOSED;
3602 * Fall through to the next section.
3608 * Called ONLY from the main thread. On the following
3614 * (and falling through from "forcibly close FD" above)
3615 * client closed connection on us
3616 * client sent us a bad packet.
3618 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3619 int count = this->count;
3620 rad_assert(this->type != RAD_LISTEN_DETAIL);
3624 * Remove it from the list of active sockets, so
3625 * that it isn't used when proxying new packets.
3627 if (this->type == RAD_LISTEN_PROXY) {
3628 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3629 if (!fr_packet_list_socket_freeze(proxy_list,
3631 radlog(L_ERR, "Fatal error freezing socket: %s",
3635 count = this->count; /* protected by mutex */
3636 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3641 * Requests are still using the socket. Wait for
3645 struct timeval when;
3646 listen_socket_t *sock = this->data;
3649 * Try again to clean up the socket in 30
3652 gettimeofday(&when, NULL);
3655 if (!fr_event_insert(el,
3656 (fr_event_callback_t) event_new_fd,
3657 this, &when, &sock->ev)) {
3658 rad_panic("Failed to insert event");
3665 * No one is using this socket: we can delete it
3668 this->status = RAD_LISTEN_STATUS_FINISH;
3672 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3673 listen_socket_t *sock = this->data;
3675 rad_assert(this->count == 0);
3676 radlog(L_INFO, " ... closing socket %s", buffer);
3679 * Remove it from the list of live FD's. Note
3680 * that it MAY also have been removed above. We
3681 * do it again here, to catch the case of sockets
3682 * closing on idle timeout, or max
3683 * lifetime... AFTER all requests have finished
3686 FD_MUTEX_LOCK(&fd_mutex);
3687 fr_event_fd_delete(el, 0, this->fd);
3688 FD_MUTEX_UNLOCK(&fd_mutex);
3692 * Remove it from the list of sockets to be used
3695 if (this->type == RAD_LISTEN_PROXY) {
3696 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3697 if (!fr_packet_list_socket_remove(proxy_list,
3699 radlog(L_ERR, "Fatal error removing socket: %s",
3703 if (sock->home) sock->home->num_connections--;
3704 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3709 * Remove any pending cleanups.
3711 if (sock->ev) fr_event_delete(el, &sock->ev);
3714 * And finally, close the socket.
3718 #endif /* WITH_TCP */
3723 static void handle_signal_self(int flag)
3725 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3726 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3727 radlog(L_INFO, "Received TERM signal");
3728 fr_event_loop_exit(el, 1);
3730 fr_event_loop_exit(el, 2);
3734 } /* else exit/term flags weren't set */
3737 * Tell the even loop to stop processing.
3739 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3741 static time_t last_hup = 0;
3744 if ((int) (when - last_hup) < 5) {
3745 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3749 radlog(L_INFO, "Received HUP signal.");
3753 fr_event_loop_exit(el, 0x80);
3757 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3761 * FIXME: O(N) loops suck.
3763 for (this = mainconfig.listen;
3765 this = this->next) {
3766 if (this->type != RAD_LISTEN_DETAIL) continue;
3769 * This one didn't send the signal, skip
3772 if (!this->decode(this, NULL)) continue;
3775 * Go service the interrupt.
3777 event_poll_detail(this);
3785 * Add event handlers for idle timeouts && maximum lifetime.
3787 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3788 struct timeval when;
3791 fr_event_now(el, &now);
3793 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3795 while (proxy_listener_list) {
3796 rad_listen_t *this = proxy_listener_list;
3797 listen_socket_t *sock = this->data;
3799 proxy_listener_list = this->next;
3802 if (!sock->home) continue; /* skip UDP sockets */
3806 if (!sock->home->idle_timeout) {
3807 rad_assert(sock->home->lifetime != 0);
3809 when.tv_sec += sock->home->lifetime;
3810 fun = tcp_socket_lifetime;
3812 rad_assert(sock->home->idle_timeout != 0);
3814 when.tv_sec += sock->home->idle_timeout;
3815 fun = tcp_socket_idle_timeout;
3818 if (!fr_event_insert(el, fun, this, &when,
3820 rad_panic("Failed to insert event");
3824 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3826 #endif /* WITH_PROXY */
3827 #endif /* WITH_TCP */
3830 #ifndef WITH_SELF_PIPE
3831 void radius_signal_self(int flag)
3833 handle_signal_self(flag);
3837 * Inform ourselves that we received a signal.
3839 void radius_signal_self(int flag)
3845 * The read MUST be non-blocking for this to work.
3847 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3851 for (i = 0; i < rcode; i++) {
3852 buffer[0] |= buffer[i];
3860 write(self_pipe[1], buffer, 1);
3864 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3865 UNUSED int fd, UNUSED void *ctx)
3870 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3871 if (rcode <= 0) return;
3874 * Merge pending signals.
3876 for (i = 0; i < rcode; i++) {
3877 buffer[0] |= buffer[i];
3880 handle_signal_self(buffer[0]);
3885 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3888 rad_listen_t *listener = ctx;
3889 RAD_REQUEST_FUNP fun;
3892 rad_assert(xel == el);
3896 if ((listener->type != RAD_LISTEN_DETAIL) &&
3897 (listener->fd < 0)) {
3900 listener->print(listener, buffer, sizeof(buffer));
3901 radlog(L_ERR, "FATAL: Asked to read from closed socket: %s",
3904 rad_panic("Socket was closed on us!");
3908 if (!listener->recv(listener, &fun, &request)) return;
3910 rad_assert(fun != NULL);
3911 rad_assert(request != NULL);
3913 thread_pool_addrequest(request, fun);
3918 * This function is called periodically to see if this detail
3919 * file is available for reading.
3921 static void event_poll_detail(void *ctx)
3924 rad_listen_t *this = ctx;
3925 struct timeval when;
3926 listen_detail_t *detail = this->data;
3928 rad_assert(this->type == RAD_LISTEN_DETAIL);
3930 event_socket_handler(el, this->fd, this);
3932 fr_event_now(el, &now);
3936 * Backdoor API to get the delay until the next poll
3939 delay = this->encode(this, NULL);
3940 tv_add(&when, delay);
3942 if (!fr_event_insert(el, event_poll_detail, this,
3943 &when, &detail->ev)) {
3944 radlog(L_ERR, "Failed creating handler");
3950 static void event_status(struct timeval *wake)
3952 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3956 if (debug_flag == 0) {
3958 radlog(L_INFO, "Ready to process requests.");
3959 just_started = FALSE;
3965 radlog(L_INFO, "Ready to process requests.");
3967 } else if ((wake->tv_sec != 0) ||
3968 (wake->tv_usec >= 100000)) {
3969 DEBUG("Waking up in %d.%01u seconds.",
3970 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3975 * FIXME: Put this somewhere else, where it isn't called
3976 * all of the time...
3979 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3981 * If there are no child threads, then there may
3982 * be child processes. In that case, wait for
3983 * their exit status, and throw that exit status
3984 * away. This helps get rid of zxombie children.
3986 while (waitpid(-1, &argval, WNOHANG) > 0) {
3994 * Externally-visibly functions.
3996 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3998 rad_listen_t *head = NULL;
4002 time(&fr_start_time);
4004 el = fr_event_list_create(event_status);
4007 pl = fr_packet_list_create(0);
4008 if (!pl) return 0; /* leak el */
4010 request_num_counter = 0;
4013 if (mainconfig.proxy_requests) {
4015 * Create the tree for managing proxied requests and
4018 proxy_list = fr_packet_list_create(1);
4019 if (!proxy_list) return 0;
4021 #ifdef HAVE_PTHREAD_H
4022 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
4023 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
4031 #ifdef HAVE_PTHREAD_H
4033 NO_SUCH_CHILD_PID = (pthread_t ) (0);
4035 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
4038 * Initialize the threads ONLY if we're spawning, AND
4039 * we're running normally.
4041 if (spawn_flag && !check_config &&
4042 (thread_pool_init(cs, &spawn_flag) < 0)) {
4048 * Move all of the thread calls to this file?
4050 * It may be best for the mutexes to be in this file...
4052 have_children = spawn_flag;
4055 DEBUG("%s: #### Skipping IP addresses and Ports ####",
4057 if (listen_init(cs, &head) < 0) {
4064 #ifdef WITH_SELF_PIPE
4066 * Child threads need a pipe to signal us, as do the
4069 if (pipe(self_pipe) < 0) {
4070 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
4074 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4075 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4079 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4080 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4085 if (!fr_event_fd_insert(el, 0, self_pipe[0],
4086 event_signal_handler, el)) {
4087 radlog(L_ERR, "Failed creating handler for signals");
4090 #endif /* WITH_SELF_PIPE */
4092 DEBUG("%s: #### Opening IP addresses and Ports ####",
4096 * The server temporarily switches to an unprivileged
4097 * user very early in the bootstrapping process.
4098 * However, some sockets MAY require privileged access
4099 * (bind to device, or to port < 1024, or to raw
4100 * sockets). Those sockets need to call suid up/down
4101 * themselves around the functions that need a privileged
4104 if (listen_init(cs, &head) < 0) {
4108 mainconfig.listen = head;
4111 * At this point, no one has any business *ever* going
4114 fr_suid_down_permanent();
4120 static int request_hash_cb(UNUSED void *ctx, void *data)
4122 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4125 rad_assert(request->in_proxy_hash == FALSE);
4128 ev_request_free(&request);
4135 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4137 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4139 ev_request_free(&request);
4145 void radius_event_free(void)
4148 * FIXME: Stop all threads, or at least check that
4149 * they're all waiting on the semaphore, and the queues
4155 * There are requests in the proxy hash that aren't
4156 * referenced from anywhere else. Remove them first.
4159 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4160 fr_packet_list_free(proxy_list);
4165 fr_packet_list_walk(pl, NULL, request_hash_cb);
4167 fr_packet_list_free(pl);
4170 fr_event_list_free(el);
4173 int radius_event_process(void)
4177 return fr_event_loop(el);
4180 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4182 request->options = RAD_REQUEST_OPTION_DEBUG2;
4184 if (request_pre_handler(request)) {
4185 rad_assert(fun != NULL);
4186 rad_assert(request != NULL);
4188 if (request->server) RDEBUG("server %s {",
4189 request->server != NULL ?
4190 request->server : "");
4193 if (request->server) RDEBUG("} # server %s",
4194 request->server != NULL ?
4195 request->server : "");
4197 request_post_handler(request);
4200 DEBUG2("Going to the next request");