2 * event.c Server event handling
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2007 The FreeRADIUS server project
21 * Copyright 2007 Alan DeKok <aland@deployingradius.com>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/radiusd.h>
28 #include <freeradius-devel/modules.h>
29 #include <freeradius-devel/event.h>
30 #include <freeradius-devel/detail.h>
32 #include <freeradius-devel/rad_assert.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
41 #define USEC (1000000)
43 extern pid_t radius_pid;
45 extern int check_config;
46 extern void force_log_reopen(void);
47 extern char *debug_condition;
50 * Ridiculous amounts of local state.
52 static fr_event_list_t *el = NULL;
53 static fr_packet_list_t *pl = NULL;
54 static int request_num_counter = 0;
55 static struct timeval now;
57 static int have_children;
58 static int just_started = TRUE;
62 #define WITH_SELF_PIPE (1)
67 static int self_pipe[2];
72 static pthread_mutex_t proxy_mutex;
73 static rad_listen_t *proxy_listener_list = NULL;
76 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
77 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
79 static pthread_t NO_SUCH_CHILD_PID;
82 * This is easier than ifdef's throughout the code.
84 #define PTHREAD_MUTEX_LOCK(_x)
85 #define PTHREAD_MUTEX_UNLOCK(_x)
86 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
88 radius_handle_request(request, fun);
94 * We need mutexes around the event FD list *only* in certain
97 #if defined (HAVE_PTHREAD_H) && (defined(WITH_PROXY) || defined(WITH_TCP))
98 static pthread_mutex_t fd_mutex;
99 #define FD_MUTEX_LOCK if (have_children) pthread_mutex_lock
100 #define FD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
103 * This is easier than ifdef's throughout the code.
105 #define FD_MUTEX_LOCK(_x)
106 #define FD_MUTEX_UNLOCK(_x)
110 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
113 static fr_packet_list_t *proxy_list = NULL;
114 static void remove_from_proxy_hash(REQUEST *request);
116 static void check_for_zombie_home_server(REQUEST *request);
118 #define remove_from_proxy_hash(foo)
121 static void request_post_handler(REQUEST *request);
122 static void wait_a_bit(void *ctx);
123 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
125 static void event_poll_detail(void *ctx);
128 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
131 radlog(L_ERR, "[%s:%d] %s", file, line, msg);
135 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
138 static void tv_add(struct timeval *tv, int usec_delay)
140 if (usec_delay > USEC) {
141 tv->tv_sec += usec_delay / USEC;
144 tv->tv_usec += usec_delay;
146 if (tv->tv_usec > USEC) {
152 static void remove_from_request_hash(REQUEST *request)
154 if (!request->in_request_hash) return;
156 fr_packet_list_yank(pl, request->packet);
157 request->in_request_hash = FALSE;
159 request_stats_final(request);
162 request->listener->count--;
167 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
169 RADIUS_PACKET **proxy_p;
172 PTHREAD_MUTEX_LOCK(&proxy_mutex);
173 proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
176 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
180 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
183 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
187 request->num_proxied_responses++;
190 * Catch the most common case of everything working
193 if (request->num_proxied_requests == request->num_proxied_responses) {
194 remove_from_proxy_hash(request);
197 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
203 static void remove_from_proxy_hash(REQUEST *request)
206 * Check this without grabbing the mutex because it's a
207 * lot faster that way.
209 if (!request->in_proxy_hash) return;
212 * The "not in hash" flag is definitive. However, if the
213 * flag says that it IS in the hash, there might still be
214 * a race condition where it isn't.
216 PTHREAD_MUTEX_LOCK(&proxy_mutex);
218 if (!request->in_proxy_hash) {
219 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
223 fr_packet_list_yank(proxy_list, request->proxy);
224 fr_packet_list_id_free(proxy_list, request->proxy);
227 * On the FIRST reply, decrement the count of outstanding
228 * requests. Note that this is NOT the count of sent
229 * packets, but whether or not the home server has
232 if (!request->proxy_reply &&
233 request->home_server &&
234 request->home_server->currently_outstanding) {
235 request->home_server->currently_outstanding--;
239 request->proxy_listener->count--;
240 request->proxy_listener = NULL;
244 * Got from YES in hash, to NO, not in hash while we hold
245 * the mutex. This guarantees that when another thread
246 * grabs the mutex, the "not in hash" flag is correct.
248 request->in_proxy_hash = FALSE;
250 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
252 #endif /* WITH_PROXY */
254 static void ev_request_free(REQUEST **prequest)
258 if (!prequest || !*prequest) return;
265 * Divorce the child from the parent first,
266 * then clean up the child.
268 request->coa->parent = NULL;
269 ev_request_free(&request->coa);
273 * Divorce the parent from the child, and leave the
274 * parent still alive.
276 if (request->parent && (request->parent->coa == request)) {
277 request->parent->coa = NULL;
281 if (request->ev) fr_event_delete(el, &request->ev);
283 if (request->in_proxy_hash) remove_from_proxy_hash(request);
285 if (request->in_request_hash) remove_from_request_hash(request);
287 request_free(prequest);
291 static int remove_all_requests(void *ctx, void *data)
293 rad_listen_t *this = ctx;
294 RADIUS_PACKET **packet_p = data;
297 request = fr_packet2myptr(REQUEST, packet, packet_p);
298 if (request->packet->sockfd != this->fd) return 0;
300 switch (request->child_state) {
301 case REQUEST_RUNNING:
302 rad_assert(request->ev != NULL); /* or it's lost forever */
304 request->master_state = REQUEST_STOP_PROCESSING;
308 * Waiting for a reply. There's no point in
309 * doing anything else. We remove it from the
310 * request hash so that we can close the upstream
313 case REQUEST_PROXIED:
314 remove_from_request_hash(request);
315 request->child_state = REQUEST_DONE;
318 case REQUEST_REJECT_DELAY:
319 case REQUEST_CLEANUP_DELAY:
321 ev_request_free(&request);
329 static int remove_all_proxied_requests(void *ctx, void *data)
331 rad_listen_t *this = ctx;
332 RADIUS_PACKET **proxy_p = data;
335 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
336 if (request->proxy->sockfd != this->fd) return 0;
338 switch (request->child_state) {
339 case REQUEST_RUNNING:
340 rad_assert(request->ev != NULL); /* or it's lost forever */
342 request->master_state = REQUEST_STOP_PROCESSING;
346 * Eventually we will discover that there is no
347 * response to the proxied request.
349 case REQUEST_PROXIED:
353 * Keep it in the cache for duplicate detection.
355 case REQUEST_REJECT_DELAY:
356 case REQUEST_CLEANUP_DELAY:
361 remove_from_proxy_hash(request);
364 #endif /* WITH_PROXY */
365 #endif /* WITH_TCP */
369 static int proxy_id_alloc(REQUEST *request, RADIUS_PACKET *packet)
371 void *proxy_listener;
373 if (fr_packet_list_id_alloc(proxy_list, request->home_server->proto,
374 packet, &proxy_listener)) {
375 request->proxy_listener = proxy_listener;
379 if (!proxy_new_listener(request->home_server, 0)) {
380 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
384 if (!fr_packet_list_id_alloc(proxy_list, request->home_server->proto,
385 packet, &proxy_listener)) {
386 RDEBUG2("ERROR: Failed allocating Id for new socket when proxying requests.");
390 request->proxy_listener = proxy_listener;
395 static int insert_into_proxy_hash(REQUEST *request, int retransmit)
399 rad_assert(request->proxy != NULL);
400 rad_assert(proxy_list != NULL);
402 PTHREAD_MUTEX_LOCK(&proxy_mutex);
405 if (!proxy_id_alloc(request, request->proxy)) {
406 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
410 RADIUS_PACKET packet;
413 rad_assert(request->home_server->proto != IPPROTO_TCP);
416 packet = *request->proxy;
418 if (!proxy_id_alloc(request, &packet)) {
419 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
424 * Yank the request, free the old Id, and
425 * remember the new Id.
427 fr_packet_list_yank(proxy_list, request->proxy);
428 fr_packet_list_id_free(proxy_list, request->proxy);
429 *request->proxy = packet;
432 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
433 fr_packet_list_id_free(proxy_list, request->proxy);
434 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
435 RDEBUG2("ERROR: Failed to insert entry into proxy list");
439 request->in_proxy_hash = TRUE;
442 * Keep track of maximum outstanding requests to a
443 * particular home server. 'max_outstanding' is
444 * enforced in home_server_ldb(), in realms.c.
446 if (request->home_server) {
447 request->home_server->currently_outstanding++;
451 request->proxy_listener->count++;
454 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
456 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
457 inet_ntop(request->proxy->dst_ipaddr.af,
458 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
459 request->proxy->dst_port,
467 * Called as BOTH an event, and in-line from other functions.
469 static void wait_for_proxy_id_to_expire(void *ctx)
471 REQUEST *request = ctx;
473 rad_assert(request->magic == REQUEST_MAGIC);
474 rad_assert(request->proxy != NULL);
476 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
477 request->when = request->proxy_when;
480 if (((request->proxy->code == PW_COA_REQUEST) ||
481 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
482 (request->packet->code != request->proxy->code)) {
483 request->when.tv_sec += request->home_server->coa_mrd;
486 request->when.tv_sec += request->home_server->response_window;
488 if ((request->num_proxied_requests == request->num_proxied_responses) ||
490 (request->home_server->proto == IPPROTO_TCP) ||
492 timercmp(&now, &request->when, >)) {
493 if (request->packet) {
494 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
495 request->number, request->packet->id,
496 (unsigned int) (request->timestamp - fr_start_time));
498 RDEBUG2("Cleaning up request %d with timestamp +%d",
500 (unsigned int) (request->timestamp - fr_start_time));
503 ev_request_free(&request);
507 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
511 #ifdef HAVE_PTHREAD_H
512 static void wait_for_child_to_die(void *ctx)
514 REQUEST *request = ctx;
516 rad_assert(request->magic == REQUEST_MAGIC);
518 if ((request->child_state == REQUEST_QUEUED) ||
519 (request->child_state == REQUEST_RUNNING)) {
520 request->delay += (request->delay >> 1);
521 tv_add(&request->when, request->delay);
523 RDEBUG2("Child is still stuck for request %d", request->number);
525 INSERT_EVENT(wait_for_child_to_die, request);
529 RDEBUG2("Child is responsive for request %d", request->number);
530 remove_from_request_hash(request);
533 if (request->proxy) {
534 wait_for_proxy_id_to_expire(request);
539 ev_request_free(&request);
543 static void cleanup_delay(void *ctx)
545 REQUEST *request = ctx;
547 rad_assert(request->magic == REQUEST_MAGIC);
548 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
549 (request->child_state == REQUEST_DONE));
551 remove_from_request_hash(request);
554 if (request->proxy && request->in_proxy_hash) {
555 wait_for_proxy_id_to_expire(request);
560 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
561 request->number, request->packet->id,
562 (unsigned int) (request->timestamp - fr_start_time));
564 ev_request_free(&request);
569 * In daemon mode, AND this request has debug flags set.
571 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
573 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
577 const char *received, *from;
578 const fr_ipaddr_t *ip;
583 rad_assert(request->radlog != NULL);
585 if (direction == 0) {
586 received = "Received";
587 from = "from"; /* what else? */
588 ip = &packet->src_ipaddr;
589 port = packet->src_port;
592 received = "Sending";
593 from = "to"; /* hah! */
594 ip = &packet->dst_ipaddr;
595 port = packet->dst_port;
599 * Client-specific debugging re-prints the input
600 * packet into the client log.
602 * This really belongs in a utility library
604 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
605 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
606 received, fr_packet_codes[packet->code], from,
607 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
608 port, packet->id, packet->data_len);
610 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
612 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
614 packet->code, packet->id, packet->data_len);
617 for (vp = packet->vps; vp != NULL; vp = vp->next) {
618 vp_prints(buffer, sizeof(buffer), vp);
619 request->radlog(L_DBG, 0, request, "\t%s", buffer);
623 static void reject_delay(void *ctx)
625 REQUEST *request = ctx;
627 rad_assert(request->magic == REQUEST_MAGIC);
628 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
630 RDEBUG2("Sending delayed reject for request %d", request->number);
632 DEBUG_PACKET(request, request->reply, 1);
634 request->listener->send(request->listener, request);
636 request->when.tv_sec += request->root->cleanup_delay;
637 request->child_state = REQUEST_CLEANUP_DELAY;
639 INSERT_EVENT(cleanup_delay, request);
644 void revive_home_server(void *ctx)
646 home_server *home = ctx;
650 rad_assert(home->proto != IPPROTO_TCP);
653 home->state = HOME_STATE_ALIVE;
654 home->currently_outstanding = 0;
655 home->revive_time = now;
658 * Delete any outstanding events.
660 if (home->ev) fr_event_delete(el, &home->ev);
662 radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
663 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
664 buffer, sizeof(buffer)),
670 static void no_response_to_ping(void *ctx)
672 REQUEST *request = ctx;
676 rad_assert(request->home_server != NULL);
678 home = request->home_server;
680 rad_assert(home->proto != IPPROTO_TCP);
683 home->num_received_pings = 0;
685 RDEBUG2("No response to status check %d from home server %s port %d",
687 inet_ntop(request->proxy->dst_ipaddr.af,
688 &request->proxy->dst_ipaddr.ipaddr,
689 buffer, sizeof(buffer)),
690 request->proxy->dst_port);
692 check_for_zombie_home_server(request);
694 wait_for_proxy_id_to_expire(request);
698 static void received_response_to_ping(REQUEST *request)
703 rad_assert(request->home_server != NULL);
705 home = request->home_server;
707 rad_assert(home->proto != IPPROTO_TCP);
710 home->num_received_pings++;
712 RDEBUG2("Received response to status check %d (%d in current sequence)",
713 request->number, home->num_received_pings);
716 * Remove the request from any hashes
718 fr_event_delete(el, &request->ev);
719 remove_from_proxy_hash(request);
720 rad_assert(request->in_request_hash == FALSE);
723 * The control socket may have marked the home server as
724 * alive. OR, it may have suddenly started responding to
725 * requests again. If so, don't re-do the "make alive"
728 if (home->state == HOME_STATE_ALIVE) return;
731 * We haven't received enough ping responses to mark it
732 * "alive". Wait a bit.
734 if (home->num_received_pings < home->num_pings_to_alive) {
738 home->state = HOME_STATE_ALIVE;
739 home->currently_outstanding = 0;
740 home->revive_time = now;
742 if (!fr_event_delete(el, &home->ev)) {
743 RDEBUG2("Hmm... no event for home server. Oh well.");
746 radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
747 inet_ntop(request->proxy->dst_ipaddr.af,
748 &request->proxy->dst_ipaddr.ipaddr,
749 buffer, sizeof(buffer)),
750 request->proxy->dst_port);
755 * Called from start of zombie period, OR after control socket
756 * marks the home server dead.
758 static void ping_home_server(void *ctx)
761 home_server *home = ctx;
766 rad_assert(home->proto != IPPROTO_TCP);
769 if ((home->state == HOME_STATE_ALIVE) ||
770 (home->ping_check == HOME_PING_CHECK_NONE) ||
771 (home->ev != NULL)) {
775 request = request_alloc();
776 request->number = request_num_counter++;
778 request->proxy = rad_alloc(1);
779 rad_assert(request->proxy != NULL);
781 fr_event_now(el, &request->when);
782 home->when = request->when;
784 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
785 request->proxy->code = PW_STATUS_SERVER;
787 radius_pairmake(request, &request->proxy->vps,
788 "Message-Authenticator", "0x00", T_OP_SET);
790 } else if (home->type == HOME_TYPE_AUTH) {
791 request->proxy->code = PW_AUTHENTICATION_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 "User-Password", home->ping_user_password, T_OP_SET);
797 radius_pairmake(request, &request->proxy->vps,
798 "Service-Type", "Authenticate-Only", T_OP_SET);
799 radius_pairmake(request, &request->proxy->vps,
800 "Message-Authenticator", "0x00", T_OP_SET);
803 #ifdef WITH_ACCOUNTING
804 request->proxy->code = PW_ACCOUNTING_REQUEST;
806 radius_pairmake(request, &request->proxy->vps,
807 "User-Name", home->ping_user_name, T_OP_SET);
808 radius_pairmake(request, &request->proxy->vps,
809 "Acct-Status-Type", "Stop", T_OP_SET);
810 radius_pairmake(request, &request->proxy->vps,
811 "Acct-Session-Id", "00000000", T_OP_SET);
812 vp = radius_pairmake(request, &request->proxy->vps,
813 "Event-Timestamp", "0", T_OP_SET);
814 vp->vp_date = now.tv_sec;
816 rad_assert("Internal sanity check failed");
820 radius_pairmake(request, &request->proxy->vps,
821 "NAS-Identifier", "Status Check. Are you alive?",
824 request->proxy->dst_ipaddr = home->ipaddr;
825 request->proxy->dst_port = home->port;
826 request->home_server = home;
828 rad_assert(request->proxy_listener == NULL);
830 if (!insert_into_proxy_hash(request, FALSE)) {
831 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash. Discarding it.",
833 ev_request_free(&request);
836 rad_assert(request->proxy_listener != NULL);
837 request->proxy_listener->send(request->proxy_listener,
840 request->next_callback = NULL;
841 request->child_state = REQUEST_PROXIED;
842 request->when.tv_sec += home->ping_timeout;;
844 INSERT_EVENT(no_response_to_ping, request);
847 * Add +/- 2s of jitter, as suggested in RFC 3539
848 * and in the Issues and Fixes draft.
850 home->when.tv_sec += home->ping_interval - 2;
853 jitter ^= (jitter >> 10);
854 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
856 tv_add(&home->when, jitter);
858 INSERT_EVENT(ping_home_server, home);
862 void mark_home_server_dead(home_server *home, struct timeval *when)
864 int previous_state = home->state;
867 radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
868 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
869 buffer, sizeof(buffer)),
872 home->state = HOME_STATE_IS_DEAD;
873 home->num_received_pings = 0;
875 if (home->ping_check != HOME_PING_CHECK_NONE) {
877 * If the control socket marks us dead, start
878 * pinging. Otherwise, we already started
879 * pinging when it was marked "zombie".
881 if (previous_state == HOME_STATE_ALIVE) {
882 ping_home_server(home);
887 * Revive it after a fixed period of time. This
888 * is very, very, bad.
891 home->when.tv_sec += home->revive_interval;
893 INSERT_EVENT(revive_home_server, home);
897 static void check_for_zombie_home_server(REQUEST *request)
902 home = request->home_server;
904 if (home->state != HOME_STATE_ZOMBIE) return;
906 when = home->zombie_period_start;
907 when.tv_sec += home->zombie_period;
909 fr_event_now(el, &now);
910 if (timercmp(&now, &when, <)) {
914 mark_home_server_dead(home, &request->when);
917 static int proxy_to_virtual_server(REQUEST *request);
919 static int virtual_server_handler(UNUSED REQUEST *request)
921 proxy_to_virtual_server(request);
925 static void proxy_fallback_handler(REQUEST *request)
928 * A proper time is required for wait_a_bit.
930 request->delay = USEC / 10;
931 gettimeofday(&now, NULL);
932 request->next_when = now;
933 tv_add(&request->next_when, request->delay);
934 request->next_callback = wait_a_bit;
937 * Re-queue the request.
939 request->child_state = REQUEST_QUEUED;
941 rad_assert(request->proxy != NULL);
942 if (!thread_pool_addrequest(request, virtual_server_handler)) {
943 request->child_state = REQUEST_DONE;
946 #ifdef HAVE_PTHREAD_H
948 * MAY free the request if we're over max_request_time,
949 * AND we're not in threaded mode!
951 * Note that we call this ONLY if we're threaded, as
952 * if we're NOT threaded, request_post_handler() calls
953 * wait_a_bit(), which means that "request" may not
956 if (have_children) wait_a_bit(request);
961 static int setup_post_proxy_fail(REQUEST *request)
963 DICT_VALUE *dval = NULL;
966 request->child_state = REQUEST_RUNNING;
968 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
969 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
971 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
972 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
976 * See no_response_to_coa_request
978 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
979 request->packet->code &= 0xff; /* restore it */
981 if (request->proxy->code == PW_COA_REQUEST) {
982 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
984 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
985 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
995 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
998 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
1002 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1003 if (!vp) vp = radius_paircreate(request, &request->config_items,
1004 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
1005 vp->vp_integer = dval->value;
1007 rad_assert(request->proxy_reply == NULL);
1013 static int null_handler(UNUSED REQUEST *request)
1018 static void post_proxy_fail_handler(REQUEST *request)
1021 * A proper time is required for wait_a_bit.
1023 request->delay = USEC / 10;
1024 gettimeofday(&now, NULL);
1027 * Not set up to run Post-Proxy-Type = Fail.
1029 * Mark the request as still running, and figure out what
1032 if (!setup_post_proxy_fail(request)) {
1033 request_post_handler(request);
1037 * Re-queue the request.
1039 request->child_state = REQUEST_QUEUED;
1042 * There is a post-proxy-type of fail. We run
1043 * the request through the pre/post proxy
1044 * handlers, just like it was a real proxied
1045 * request. However, we set the per-request
1046 * handler to NULL, as we don't want to do
1049 * Note that when we're not threaded, this will
1050 * process the request even if it's greater than
1051 * max_request_time. That's not fatal.
1053 request->priority = 0;
1054 rad_assert(request->proxy != NULL);
1055 thread_pool_addrequest(request, null_handler);
1059 * MAY free the request if we're over max_request_time,
1060 * AND we're not in threaded mode!
1062 * Note that we call this ONLY if we're threaded, as
1063 * if we're NOT threaded, request_post_handler() calls
1064 * wait_a_bit(), which means that "request" may not
1067 if (have_children) wait_a_bit(request);
1070 /* maybe check this against wait_for_proxy_id_to_expire? */
1071 static void no_response_to_proxied_request(void *ctx)
1073 REQUEST *request = ctx;
1077 rad_assert(request->magic == REQUEST_MAGIC);
1079 if (request->master_state == REQUEST_STOP_PROCESSING) {
1080 ev_request_free(&request);
1084 rad_assert(request->child_state == REQUEST_PROXIED);
1087 * If we've failed over to an internal home server,
1088 * replace the callback with the correct one. This
1089 * is due to locking issues with child threads...
1091 if (request->home_server->server) {
1092 wait_a_bit(request);
1097 if (request->home_server->proto != IPPROTO_TCP)
1099 check_for_zombie_home_server(request);
1101 home = request->home_server;
1104 * The default as of 2.1.7 is to allow requests to
1105 * fail-over to a backup home server when this one does
1106 * not respond. The old behavior can be configured as
1109 if (home->no_response_fail) {
1110 radlog(L_ERR, "Rejecting request %d (proxy Id %d) due to lack of any response from home server %s port %d",
1111 request->number, request->proxy->id,
1112 inet_ntop(request->proxy->dst_ipaddr.af,
1113 &request->proxy->dst_ipaddr.ipaddr,
1114 buffer, sizeof(buffer)),
1115 request->proxy->dst_port);
1117 post_proxy_fail_handler(request);
1120 * Ensure that there is a callback for the request.
1122 request->child_state = REQUEST_RUNNING;
1123 wait_a_bit(request);
1127 * Don't touch request due to race conditions
1132 * Do nothing more. The home server didn't respond,
1133 * but that isn't a catastrophic failure. Some home
1134 * servers don't respond to packets...
1136 if (home->proto == IPPROTO_TCP) {
1138 * FIXME: Set up TCP pinging on this connection.
1140 * Maybe the CONNECTION is dead, but the home
1141 * server is alive. In that case, we need to start
1142 * pinging on the connection.
1144 * This means doing the pinging BEFORE the
1145 * post_proxy_fail_handler above, as it may do
1146 * something with the request, and cause the
1147 * proxy listener to go away!
1153 if (home->state == HOME_STATE_IS_DEAD) {
1154 rad_assert(home->ev != NULL); /* or it will never wake up */
1159 * Enable the zombie period when we notice that the home
1160 * server hasn't responded. We do NOT back-date the start
1161 * of the zombie period.
1163 if (home->state == HOME_STATE_ALIVE) {
1164 home->state = HOME_STATE_ZOMBIE;
1165 home->zombie_period_start = now;
1167 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1168 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1169 buffer, sizeof(buffer)),
1173 * Start pinging the home server.
1175 ping_home_server(home);
1180 static void wait_a_bit(void *ctx)
1182 struct timeval when;
1183 REQUEST *request = ctx;
1184 fr_event_callback_t callback = NULL;
1186 rad_assert(request->magic == REQUEST_MAGIC);
1189 * The socket was closed. Tell the request that
1190 * there is no point in continuing.
1192 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1193 goto stop_processing;
1198 * The CoA request is a new (internally generated)
1199 * request, created in a child thread. We therefore need
1200 * some way to tie its events back into the main event
1203 if (request->coa && !request->coa->proxy_reply &&
1204 request->coa->next_callback) {
1205 request->coa->when = request->coa->next_when;
1206 INSERT_EVENT(request->coa->next_callback, request->coa);
1207 request->coa->next_callback = NULL;
1208 request->coa->parent = NULL;
1209 request->coa = NULL;
1213 switch (request->child_state) {
1214 case REQUEST_QUEUED:
1215 case REQUEST_RUNNING:
1216 when = request->received;
1217 when.tv_sec += request->root->max_request_time;
1220 * Normally called from the event loop with the
1221 * proper event loop time. Otherwise, called from
1222 * post proxy fail handler, which sets "now", and
1223 * this call won't re-set it, because we're not
1224 * in the event loop.
1226 fr_event_now(el, &now);
1229 * Request still has more time. Continue
1232 if (timercmp(&now, &when, <) ||
1233 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1234 (request->child_state == REQUEST_QUEUED))) {
1235 if (request->delay < (USEC / 10)) {
1236 request->delay = USEC / 10;
1238 request->delay += request->delay >> 1;
1242 * Cap wait at some sane value for detail
1245 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1246 (request->delay > (request->root->max_request_time * USEC))) {
1247 request->delay = request->root->max_request_time * USEC;
1251 request->when = now;
1252 tv_add(&request->when, request->delay);
1253 callback = wait_a_bit;
1257 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1259 * A child thread MAY still be running on the
1260 * request. Ask the thread to stop working on
1263 if (have_children) {
1264 /* FIXME: kill unresponsive children? */
1267 * Print this error message ONLY if
1268 * there's a child currently processing
1269 * the request. As we don't have thread
1270 * locks here, there may be race
1271 * conditions on this check. But it's
1272 * just an error message, so that's OK.
1274 if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1275 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1277 request->module ? request->module : "<server core>",
1278 request->component ? request->component : "<server core>");
1282 request->master_state = REQUEST_STOP_PROCESSING;
1284 request->delay = USEC / 4;
1285 tv_add(&request->when, request->delay);
1286 callback = wait_for_child_to_die;
1289 #else /* no child threads */
1294 * Else there are no child threads. We probably
1295 * should have just marked the request as 'done'
1296 * elsewhere, like in the post-proxy-fail
1297 * handler. But doing that would involve
1298 * checking for max_request_time in multiple
1299 * places, so this may be simplest.
1301 request->child_state = REQUEST_DONE;
1305 * Mark the request as no longer running,
1309 #ifdef HAVE_PTHREAD_H
1310 request->child_pid = NO_SUCH_CHILD_PID;
1315 * This is a CoA request. It's been divorced
1316 * from everything else, so we clean it up now.
1318 if (!request->in_request_hash &&
1320 (request->packet->code != request->proxy->code) &&
1321 ((request->proxy->code == PW_COA_REQUEST) ||
1322 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1324 * FIXME: Do CoA MIBs
1326 ev_request_free(&request);
1330 request_stats_final(request);
1331 cleanup_delay(request);
1334 case REQUEST_REJECT_DELAY:
1335 case REQUEST_CLEANUP_DELAY:
1336 #ifdef HAVE_PTHREAD_H
1337 request->child_pid = NO_SUCH_CHILD_PID;
1339 request_stats_final(request);
1341 case REQUEST_PROXIED:
1342 rad_assert(request->next_callback != NULL);
1343 rad_assert(request->next_callback != wait_a_bit);
1345 request->when = request->next_when;
1346 callback = request->next_callback;
1347 request->next_callback = NULL;
1351 rad_panic("Internal sanity check failure");
1356 * Something major went wrong. Discard the request, and
1359 * FIXME: No idea why this happens or how to fix it...
1360 * It seems to happen *only* when requests are proxied,
1361 * and where the home server doesn't respond. So it looks
1362 * like a race condition above, but it happens in debug
1363 * mode, with no threads...
1366 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1367 ev_request_free(&request);
1371 INSERT_EVENT(callback, request);
1375 static void no_response_to_coa_request(void *ctx)
1377 REQUEST *request = ctx;
1380 rad_assert(request->magic == REQUEST_MAGIC);
1381 rad_assert(request->child_state == REQUEST_PROXIED);
1382 rad_assert(request->home_server != NULL);
1383 rad_assert(!request->in_request_hash);
1385 radlog(L_ERR, "No response to CoA request sent to %s",
1386 inet_ntop(request->proxy->dst_ipaddr.af,
1387 &request->proxy->dst_ipaddr.ipaddr,
1388 buffer, sizeof(buffer)));
1393 request->packet->code |= (PW_COA_REQUEST << 8);
1394 post_proxy_fail_handler(request);
1398 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1402 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1409 packet->data = NULL;
1410 packet->data_len = 0;
1413 return 1; /* time stamp updated */
1418 * Called when we haven't received a response to a CoA request.
1420 static void retransmit_coa_request(void *ctx)
1424 REQUEST *request = ctx;
1426 rad_assert(request->magic == REQUEST_MAGIC);
1427 rad_assert(request->child_state == REQUEST_PROXIED);
1428 rad_assert(request->home_server != NULL);
1429 rad_assert(!request->in_request_hash);
1430 rad_assert(request->parent == NULL);
1432 fr_event_now(el, &now);
1435 * Cap count at MRC, if it is non-zero.
1437 if (request->home_server->coa_mrc &&
1438 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1439 no_response_to_coa_request(request);
1444 * RFC 5080 Section 2.2.1
1446 * RT = 2*RTprev + RAND*RTprev
1447 * = 1.9 * RTprev + rand(0,.2) * RTprev
1448 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1451 delay ^= (delay >> 16);
1453 frac = request->delay / 5;
1454 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1456 delay += (2 * request->delay) - (request->delay / 10);
1459 * Cap delay at MRT, if MRT is non-zero.
1461 if (request->home_server->coa_mrt &&
1462 (delay > (request->home_server->coa_mrt * USEC))) {
1463 int mrt_usec = request->home_server->coa_mrt * USEC;
1466 * delay = MRT + RAND * MRT
1467 * = 0.9 MRT + rand(0,.2) * MRT
1470 delay ^= (delay >> 15);
1472 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1473 delay += mrt_usec - (mrt_usec / 10);
1476 request->delay = delay;
1477 request->when = now;
1478 tv_add(&request->when, request->delay);
1479 mrd = request->proxy_when;
1480 mrd.tv_sec += request->home_server->coa_mrd;
1483 * Cap duration at MRD.
1485 if (timercmp(&mrd, &request->when, <)) {
1486 request->when = mrd;
1487 INSERT_EVENT(no_response_to_coa_request, request);
1490 INSERT_EVENT(retransmit_coa_request, request);
1493 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1494 if (!insert_into_proxy_hash(request, TRUE)) {
1495 DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1499 request->num_proxied_requests = 0;
1500 request->num_proxied_responses = 0;
1503 request->num_proxied_requests++;
1504 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1506 request->proxy_listener->send(request->proxy_listener,
1512 * The original request is either DONE, or in CLEANUP_DELAY.
1514 static int originated_coa_request(REQUEST *request)
1516 int delay, rcode, pre_proxy_type = 0;
1522 rad_assert(request->proxy == NULL);
1523 rad_assert(!request->in_proxy_hash);
1524 rad_assert(request->proxy_reply == NULL);
1526 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1527 if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1529 if (vp->vp_integer == 0) {
1530 ev_request_free(&request->coa);
1531 return 1; /* success */
1534 if (!request->coa) request_alloc_coa(request);
1535 if (!request->coa) return 0;
1541 * src_ipaddr will be set up in proxy_encode.
1543 memset(&ipaddr, 0, sizeof(ipaddr));
1544 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1546 ipaddr.af = AF_INET;
1547 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1549 } else if ((vp = pairfind(coa->proxy->vps,
1550 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1551 ipaddr.af = AF_INET6;
1552 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1554 } else if ((vp = pairfind(coa->proxy->vps,
1555 PW_HOME_SERVER_POOL)) != NULL) {
1556 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1558 if (!coa->home_pool) {
1559 RDEBUG2("WARNING: No such home_server_pool %s",
1562 ev_request_free(&request->coa);
1569 } else if (request->client->coa_pool) {
1570 coa->home_pool = request->client->coa_pool;
1572 } else if (request->client->coa_server) {
1573 coa->home_server = request->client->coa_server;
1577 * If all else fails, send it to the client that
1578 * originated this request.
1580 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1584 * Use the pool, if it exists.
1586 if (coa->home_pool) {
1587 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1588 if (!coa->home_server) {
1589 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1593 } else if (!coa->home_server) {
1594 int port = PW_COA_UDP_PORT;
1596 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1597 if (vp) port = vp->vp_integer;
1599 coa->home_server = home_server_find(&ipaddr, port);
1600 if (!coa->home_server) {
1601 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1602 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1603 buffer, sizeof(buffer)), port);
1608 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1610 switch (vp->vp_integer) {
1611 case PW_COA_REQUEST:
1612 case PW_DISCONNECT_REQUEST:
1613 coa->proxy->code = vp->vp_integer;
1617 DEBUG("Cannot set CoA Packet-Type to code %d",
1623 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1626 * The rest of the server code assumes that
1627 * request->packet && request->reply exist. Copy them
1628 * from the original request.
1630 rad_assert(coa->packet != NULL);
1631 rad_assert(coa->packet->vps == NULL);
1632 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1633 coa->packet->vps = paircopy(request->packet->vps);
1634 coa->packet->data = NULL;
1635 rad_assert(coa->reply != NULL);
1636 rad_assert(coa->reply->vps == NULL);
1637 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1638 coa->reply->vps = paircopy(request->reply->vps);
1639 coa->reply->data = NULL;
1640 coa->config_items = paircopy(request->config_items);
1643 * Call the pre-proxy routines.
1645 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1647 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1648 pre_proxy_type = vp->vp_integer;
1651 if (coa->home_pool && coa->home_pool->virtual_server) {
1652 const char *old_server = coa->server;
1654 coa->server = coa->home_pool->virtual_server;
1655 RDEBUG2(" server %s {", coa->server);
1656 rcode = module_pre_proxy(pre_proxy_type, coa);
1658 coa->server = old_server;
1660 rcode = module_pre_proxy(pre_proxy_type, coa);
1667 * Only send the CoA packet if the pre-proxy code succeeded.
1669 case RLM_MODULE_NOOP:
1671 case RLM_MODULE_UPDATED:
1676 * Source IP / port is set when the proxy socket
1679 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1680 coa->proxy->dst_port = coa->home_server->port;
1682 if (!insert_into_proxy_hash(coa, FALSE)) {
1683 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1688 * We CANNOT divorce the CoA request from the parent
1689 * request. This function is running in a child thread,
1690 * and we need access to the main event loop in order to
1691 * to add the timers for the CoA packet. See
1696 * Forget about the original request completely at this
1701 gettimeofday(&request->proxy_when, NULL);
1702 request->received = request->next_when = request->proxy_when;
1703 rad_assert(request->proxy_reply == NULL);
1706 * Implement re-transmit algorithm as per RFC 5080
1709 * We want IRT + RAND*IRT
1710 * or 0.9 IRT + rand(0,.2) IRT
1712 * 2^20 ~ USEC, and we want 2.
1713 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1715 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1716 request->delay = delay * request->home_server->coa_irt;
1717 delay = request->home_server->coa_irt * USEC;
1718 delay -= delay / 10;
1719 delay += request->delay;
1721 request->delay = delay;
1722 tv_add(&request->next_when, delay);
1723 request->next_callback = retransmit_coa_request;
1726 * Note that we set proxied BEFORE sending the packet.
1728 * Once we send it, the request is tainted, as
1729 * another thread may have picked it up. Don't
1732 request->num_proxied_requests = 1;
1733 request->num_proxied_responses = 0;
1734 request->child_pid = NO_SUCH_CHILD_PID;
1736 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1738 request->child_state = REQUEST_PROXIED;
1740 DEBUG_PACKET(request, request->proxy, 1);
1742 request->proxy_listener->send(request->proxy_listener,
1746 #endif /* WITH_COA */
1749 static int process_proxy_reply(REQUEST *request)
1752 int post_proxy_type = 0;
1756 * Delete any reply we had accumulated until now.
1758 pairfree(&request->reply->vps);
1761 * Run the packet through the post-proxy stage,
1762 * BEFORE playing games with the attributes.
1764 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1766 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1767 post_proxy_type = vp->vp_integer;
1770 if (request->home_pool && request->home_pool->virtual_server) {
1771 const char *old_server = request->server;
1773 request->server = request->home_pool->virtual_server;
1774 RDEBUG2(" server %s {", request->server);
1775 rcode = module_post_proxy(post_proxy_type, request);
1777 request->server = old_server;
1779 rcode = module_post_proxy(post_proxy_type, request);
1783 if (request->packet->code == request->proxy->code)
1785 * Don't run the next bit if we originated a CoA
1786 * packet, after receiving an Access-Request or
1787 * Accounting-Request.
1792 * There may NOT be a proxy reply, as we may be
1793 * running Post-Proxy-Type = Fail.
1795 if (request->proxy_reply) {
1797 * Delete the Proxy-State Attributes from
1798 * the reply. These include Proxy-State
1799 * attributes from us and remote server.
1801 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1804 * Add the attributes left in the proxy
1805 * reply to the reply list.
1807 pairadd(&request->reply->vps, request->proxy_reply->vps);
1808 request->proxy_reply->vps = NULL;
1811 * Free proxy request pairs.
1813 pairfree(&request->proxy->vps);
1817 default: /* Don't do anything */
1819 case RLM_MODULE_FAIL:
1820 /* FIXME: debug print stuff */
1821 request->child_state = REQUEST_DONE;
1824 case RLM_MODULE_HANDLED:
1825 /* FIXME: debug print stuff */
1826 request->child_state = REQUEST_DONE;
1834 static int request_pre_handler(REQUEST *request)
1838 rad_assert(request->magic == REQUEST_MAGIC);
1839 rad_assert(request->packet != NULL);
1841 request->child_state = REQUEST_RUNNING;
1844 * Don't decode the packet if it's an internal "fake"
1845 * request. Instead, just return so that the caller can
1848 if (request->packet->dst_port == 0) {
1849 request->username = pairfind(request->packet->vps,
1851 request->password = pairfind(request->packet->vps,
1858 * Put the decoded packet into it's proper place.
1860 if (request->proxy_reply != NULL) {
1862 * FIXME: For now, we can only proxy RADIUS packets.
1864 * In order to proxy other packets, we need to
1865 * somehow cache the "decode" function.
1867 rcode = rad_decode(request->proxy_reply, request->proxy,
1868 request->home_server->secret);
1869 DEBUG_PACKET(request, request->proxy_reply, 0);
1872 if (request->packet->vps == NULL) {
1873 rcode = request->listener->decode(request->listener, request);
1875 if (debug_condition) {
1877 const char *my_debug = debug_condition;
1880 * Ignore parse errors.
1882 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1886 request->options = 2;
1887 request->radlog = radlog_request;
1891 DEBUG_PACKET(request, request->packet, 0);
1897 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1898 request->child_state = REQUEST_DONE;
1902 if (!request->username) {
1903 request->username = pairfind(request->packet->vps,
1908 if (request->proxy) {
1909 return process_proxy_reply(request);
1919 * Do state handling when we proxy a request.
1921 static int proxy_request(REQUEST *request)
1923 struct timeval when;
1926 if (request->home_server->server) {
1927 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1931 if (!insert_into_proxy_hash(request, FALSE)) {
1932 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1936 request->proxy_listener->encode(request->proxy_listener, request);
1938 when = request->received;
1939 when.tv_sec += request->root->max_request_time;
1941 gettimeofday(&request->proxy_when, NULL);
1943 request->next_when = request->proxy_when;
1944 request->next_when.tv_sec += request->home_server->response_window;
1946 rad_assert(request->home_server->response_window > 0);
1948 if (timercmp(&when, &request->next_when, <)) {
1949 request->next_when = when;
1951 request->next_callback = no_response_to_proxied_request;
1953 RDEBUG2("Proxying request %d to home server %s port %d",
1955 inet_ntop(request->proxy->dst_ipaddr.af,
1956 &request->proxy->dst_ipaddr.ipaddr,
1957 buffer, sizeof(buffer)),
1958 request->proxy->dst_port);
1961 * Note that we set proxied BEFORE sending the packet.
1963 * Once we send it, the request is tainted, as
1964 * another thread may have picked it up. Don't
1967 request->num_proxied_requests = 1;
1968 request->num_proxied_responses = 0;
1969 #ifdef HAVE_PTHREAD_H
1970 request->child_pid = NO_SUCH_CHILD_PID;
1972 request->child_state = REQUEST_PROXIED;
1974 DEBUG_PACKET(request, request->proxy, 1);
1976 request->proxy_listener->send(request->proxy_listener,
1983 * "Proxy" the request by sending it to a new virtual server.
1985 static int proxy_to_virtual_server(REQUEST *request)
1988 RAD_REQUEST_FUNP fun;
1990 if (!request->home_server || !request->home_server->server) return 0;
1992 if (request->parent) {
1993 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1997 fake = request_alloc_fake(request);
1999 RDEBUG2("WARNING: Out of memory");
2003 fake->packet->vps = paircopy(request->proxy->vps);
2004 fake->server = request->home_server->server;
2006 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2007 fun = rad_authenticate;
2009 #ifdef WITH_ACCOUNTING
2010 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2011 fun = rad_accounting;
2015 RDEBUG2("Unknown packet type %d", request->proxy->code);
2016 ev_request_free(&fake);
2020 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2021 radius_handle_request(fake, fun);
2022 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2024 if (fake->reply->code != 0) {
2025 request->proxy_reply = fake->reply;
2029 * There was no response
2031 setup_post_proxy_fail(request);
2034 ev_request_free(&fake);
2036 process_proxy_reply(request);
2039 * Process it through the normal section again, but ONLY
2040 * if we received a proxy reply..
2042 if (request->proxy_reply) {
2043 if (request->server) RDEBUG("server %s {",
2044 request->server != NULL ?
2045 request->server : "");
2048 if (request->server) RDEBUG("} # server %s",
2049 request->server != NULL ?
2050 request->server : "");
2053 return 2; /* success, but NOT '1' !*/
2057 * Return 1 if we did proxy it, or the proxy attempt failed
2058 * completely. Either way, the caller doesn't touch the request
2059 * any more if we return 1.
2061 static int successfully_proxied_request(REQUEST *request)
2064 int pre_proxy_type = 0;
2065 VALUE_PAIR *realmpair;
2066 VALUE_PAIR *strippedname;
2068 char *realmname = NULL;
2070 REALM *realm = NULL;
2074 * If it was already proxied, do nothing.
2076 * FIXME: This should really be a serious error.
2078 if (request->in_proxy_hash ||
2079 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2083 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2084 if (!realmpair || (realmpair->length == 0)) {
2087 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2090 switch (request->packet->code) {
2091 case PW_AUTHENTICATION_REQUEST:
2092 pool_type = HOME_TYPE_AUTH;
2095 #ifdef WITH_ACCOUNTING
2096 case PW_ACCOUNTING_REQUEST:
2097 pool_type = HOME_TYPE_ACCT;
2102 case PW_COA_REQUEST:
2103 case PW_DISCONNECT_REQUEST:
2104 pool_type = HOME_TYPE_COA;
2112 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2114 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2119 realmname = NULL; /* no realms */
2124 realmname = (char *) realmpair->vp_strvalue;
2126 realm = realm_find2(realmname);
2128 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2133 * Figure out which pool to use.
2135 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2136 pool = realm->auth_pool;
2138 #ifdef WITH_ACCOUNTING
2139 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2140 pool = realm->acct_pool;
2144 } else if ((request->packet->code == PW_COA_REQUEST) ||
2145 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2146 pool = realm->acct_pool;
2150 rad_panic("Internal sanity check failed");
2154 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2160 home = home_server_ldb(realmname, pool, request);
2162 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2166 request->home_pool = pool;
2170 * Once we've decided to proxy a request, we cannot send
2171 * a CoA packet. So we free up any CoA packet here.
2173 ev_request_free(&request->coa);
2176 * Remember that we sent the request to a Realm.
2178 if (realmname) pairadd(&request->packet->vps,
2179 pairmake("Realm", realmname, T_OP_EQ));
2182 * Strip the name, if told to.
2184 * Doing it here catches the case of proxied tunneled
2187 if (realm && (realm->striprealm == TRUE) &&
2188 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2190 * If there's a Stripped-User-Name attribute in
2191 * the request, then use THAT as the User-Name
2192 * for the proxied request, instead of the
2195 * This is done by making a copy of the
2196 * Stripped-User-Name attribute, turning it into
2197 * a User-Name attribute, deleting the
2198 * Stripped-User-Name and User-Name attributes
2199 * from the vps list, and making the new
2200 * User-Name the head of the vps list.
2202 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2204 vp = radius_paircreate(request, NULL,
2205 PW_USER_NAME, PW_TYPE_STRING);
2206 rad_assert(vp != NULL); /* handled by above function */
2207 /* Insert at the START of the list */
2208 vp->next = request->proxy->vps;
2209 request->proxy->vps = vp;
2211 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2212 sizeof(vp->vp_strvalue));
2213 vp->length = strippedname->length;
2216 * Do NOT delete Stripped-User-Name.
2221 * If there is no PW_CHAP_CHALLENGE attribute but
2222 * there is a PW_CHAP_PASSWORD we need to add it
2223 * since we can't use the request authenticator
2224 * anymore - we changed it.
2226 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2227 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2228 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2229 vp = radius_paircreate(request, &request->proxy->vps,
2230 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2231 vp->length = AUTH_VECTOR_LEN;
2232 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2236 * The RFC's say we have to do this, but FreeRADIUS
2239 vp = radius_paircreate(request, &request->proxy->vps,
2240 PW_PROXY_STATE, PW_TYPE_OCTETS);
2241 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2242 request->packet->id);
2243 vp->length = strlen(vp->vp_strvalue);
2246 * Should be done BEFORE inserting into proxy hash, as
2247 * pre-proxy may use this information, or change it.
2249 request->proxy->code = request->packet->code;
2252 * Call the pre-proxy routines.
2254 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2256 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2257 pre_proxy_type = vp->vp_integer;
2260 rad_assert(request->home_pool != NULL);
2262 if (request->home_pool->virtual_server) {
2263 const char *old_server = request->server;
2265 request->server = request->home_pool->virtual_server;
2266 RDEBUG2(" server %s {", request->server);
2267 rcode = module_pre_proxy(pre_proxy_type, request);
2269 request->server = old_server;
2271 rcode = module_pre_proxy(pre_proxy_type, request);
2274 case RLM_MODULE_FAIL:
2275 case RLM_MODULE_INVALID:
2276 case RLM_MODULE_NOTFOUND:
2277 case RLM_MODULE_USERLOCK:
2279 /* FIXME: debug print failed stuff */
2282 case RLM_MODULE_REJECT:
2283 case RLM_MODULE_HANDLED:
2287 * Only proxy the packet if the pre-proxy code succeeded.
2289 case RLM_MODULE_NOOP:
2291 case RLM_MODULE_UPDATED:
2296 * If it's a fake request, don't send the proxy
2297 * packet. The outer tunnel session will take
2298 * care of doing that.
2300 if (request->packet->dst_port == 0) {
2301 request->home_server = NULL;
2305 if (request->home_server->server) {
2306 return proxy_to_virtual_server(request);
2309 if (!proxy_request(request)) {
2310 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2318 static void request_post_handler(REQUEST *request)
2320 int child_state = -1;
2321 struct timeval when;
2324 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2326 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2327 RDEBUG2("Request %d was cancelled.", request->number);
2328 #ifdef HAVE_PTHREAD_H
2329 request->child_pid = NO_SUCH_CHILD_PID;
2331 child_state = REQUEST_DONE;
2335 if (request->child_state != REQUEST_RUNNING) {
2336 rad_panic("Internal sanity check failed");
2341 * If it's not in the request hash, it's a CoA request.
2344 if (!request->in_request_hash &&
2346 ((request->proxy->code == PW_COA_REQUEST) ||
2347 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2348 request->next_callback = NULL;
2349 child_state = REQUEST_DONE;
2355 * Catch Auth-Type := Reject BEFORE proxying the packet.
2357 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2358 (request->reply->code == 0) &&
2359 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2360 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2361 request->reply->code = PW_AUTHENTICATION_REJECT;
2365 if (request->root->proxy_requests &&
2366 !request->in_proxy_hash &&
2367 (request->reply->code == 0) &&
2368 (request->packet->dst_port != 0) &&
2369 (request->packet->code != PW_STATUS_SERVER)) {
2370 int rcode = successfully_proxied_request(request);
2372 if (rcode == 1) return; /* request is invalid */
2375 * Failed proxying it (dead home servers, etc.)
2376 * Run it through Post-Proxy-Type = Fail, and
2377 * respond to the request.
2379 * Note that we're in a child thread here, so we
2380 * do NOT re-schedule the request. Instead, we
2381 * do what we would have done, which is run the
2382 * pre-handler, a NULL request handler, and then
2385 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2386 request_pre_handler(request);
2390 * Else we weren't supposed to proxy it,
2391 * OR we proxied it internally to a virutal server.
2397 * Fake requests don't get encoded or signed. The caller
2398 * also requires the reply VP's, so we don't free them
2401 if (request->packet->dst_port == 0) {
2402 /* FIXME: RDEBUG going to the next request */
2403 #ifdef HAVE_PTHREAD_H
2404 request->child_pid = NO_SUCH_CHILD_PID;
2406 request->child_state = REQUEST_DONE;
2412 * Copy Proxy-State from the request to the reply.
2414 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2415 if (vp) pairadd(&request->reply->vps, vp);
2419 * Access-Requests get delayed or cached.
2421 switch (request->packet->code) {
2422 case PW_AUTHENTICATION_REQUEST:
2423 gettimeofday(&request->next_when, NULL);
2425 if (request->reply->code == 0) {
2427 * Check if the lack of response is intentional.
2429 vp = pairfind(request->config_items,
2430 PW_RESPONSE_PACKET_TYPE);
2432 RDEBUG2("There was no response configured: rejecting request %d",
2434 request->reply->code = PW_AUTHENTICATION_REJECT;
2436 } else if (vp->vp_integer == 256) {
2437 RDEBUG2("Not responding to request %d",
2441 * Force cleanup after a long
2442 * time, so that we don't
2443 * re-process the packet.
2445 request->next_when.tv_sec += request->root->max_request_time;
2446 request->next_callback = cleanup_delay;
2447 child_state = REQUEST_CLEANUP_DELAY;
2450 request->reply->code = vp->vp_integer;
2456 * Run rejected packets through
2458 * Post-Auth-Type = Reject
2460 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2461 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2462 vp = radius_pairmake(request, &request->config_items,
2463 "Post-Auth-Type", "Reject",
2465 if (vp) rad_postauth(request);
2468 * If configured, delay Access-Reject packets.
2470 * If request->root->reject_delay = 0, we discover
2471 * that we have to send the packet now.
2473 when = request->received;
2474 when.tv_sec += request->root->reject_delay;
2476 if (timercmp(&when, &request->next_when, >)) {
2477 RDEBUG2("Delaying reject of request %d for %d seconds",
2479 request->root->reject_delay);
2480 request->next_when = when;
2481 request->next_callback = reject_delay;
2482 #ifdef HAVE_PTHREAD_H
2483 request->child_pid = NO_SUCH_CHILD_PID;
2485 request->child_state = REQUEST_REJECT_DELAY;
2491 case PW_COA_REQUEST:
2492 case PW_DISCONNECT_REQUEST:
2494 request->next_when.tv_sec += request->root->cleanup_delay;
2495 request->next_callback = cleanup_delay;
2496 child_state = REQUEST_CLEANUP_DELAY;
2499 case PW_ACCOUNTING_REQUEST:
2500 request->next_callback = NULL; /* just to be safe */
2501 child_state = REQUEST_DONE;
2505 * FIXME: Status-Server should probably not be
2508 case PW_STATUS_SERVER:
2509 request->next_callback = NULL;
2510 child_state = REQUEST_DONE;
2517 request->next_callback = NULL;
2518 child_state = REQUEST_DONE;
2523 * Suppress "no reply" packets here, unless we're reading
2524 * from the "detail" file. In that case, we've got to
2525 * tell the detail file handler that the request is dead,
2526 * and it should re-send it.
2527 * If configured, encode, sign, and send.
2529 if ((request->reply->code != 0) ||
2530 (request->listener->type == RAD_LISTEN_DETAIL)) {
2531 DEBUG_PACKET(request, request->reply, 1);
2532 request->listener->send(request->listener, request);
2537 * Now that we've completely processed the request,
2538 * see if we need to originate a CoA request.
2541 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2542 if (!originated_coa_request(request)) {
2543 RDEBUG2("Do CoA Fail handler here");
2545 /* request->coa is stil set, so we can update events */
2551 * Clean up. These are no longer needed.
2553 pairfree(&request->config_items);
2555 pairfree(&request->packet->vps);
2556 request->username = NULL;
2557 request->password = NULL;
2559 pairfree(&request->reply->vps);
2562 if (request->proxy) {
2563 pairfree(&request->proxy->vps);
2565 if (request->proxy_reply) {
2566 pairfree(&request->proxy_reply->vps);
2571 * We're not tracking responses from the home
2572 * server, we can therefore free this memory in
2575 if (!request->in_proxy_hash) {
2576 rad_free(&request->proxy);
2577 rad_free(&request->proxy_reply);
2578 request->home_server = NULL;
2584 RDEBUG2("Finished request %d.", request->number);
2585 rad_assert(child_state >= 0);
2586 request->child_state = child_state;
2589 * Single threaded mode: update timers now.
2591 if (!have_children) wait_a_bit(request);
2595 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2601 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2602 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2604 switch (request->child_state) {
2605 case REQUEST_QUEUED:
2606 case REQUEST_RUNNING:
2610 radlog(L_ERR, "Discarding duplicate request from "
2611 "client %s port %d - ID: %d due to unfinished request %d",
2613 request->packet->src_port,request->packet->id,
2618 case REQUEST_PROXIED:
2620 * We're not supposed to have duplicate
2621 * accounting packets. The other states handle
2622 * duplicates fine (discard, or send duplicate
2623 * reply). But we do NOT want to retransmit an
2624 * accounting request here, because that would
2625 * involve updating the Acct-Delay-Time, and
2626 * therefore changing the packet Id, etc.
2628 * Instead, we just discard the packet. We may
2629 * eventually respond, or the client will send a
2630 * new accounting packet.
2632 * The same comments go for Status-Server, and
2633 * other packet types.
2635 * FIXME: coa: when we proxy CoA && Disconnect
2636 * packets, this logic has to be fixed.
2638 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2642 check_for_zombie_home_server(request);
2645 * If we've just discovered that the home server
2646 * is dead, OR the socket has been closed, look for
2647 * another connection to a home server.
2649 if (((request->packet->dst_port != 0) &&
2650 (request->home_server->state == HOME_STATE_IS_DEAD)) ||
2651 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2654 remove_from_proxy_hash(request);
2656 home = home_server_ldb(NULL, request->home_pool, request);
2658 RDEBUG2("Failed to find live home server for request %d", request->number);
2661 * Do post-request processing,
2662 * and any insertion of necessary
2665 post_proxy_fail_handler(request);
2669 request->proxy->code = request->packet->code;
2672 * Free the old packet, to force re-encoding
2674 free(request->proxy->data);
2675 request->proxy->data = NULL;
2676 request->proxy->data_len = 0;
2679 * This request failed over to a virtual
2680 * server. Push it back onto the queue
2683 if (request->home_server->server) {
2684 proxy_fallback_handler(request);
2689 * Try to proxy the request.
2691 if (!proxy_request(request)) {
2692 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2693 goto no_home_servers;
2697 * This code executes in the main server
2698 * thread, so there's no need for locking.
2700 rad_assert(request->next_callback != NULL);
2701 INSERT_EVENT(request->next_callback, request);
2702 request->next_callback = NULL;
2704 } /* else the home server is still alive */
2707 if (request->home_server->proto == IPPROTO_TCP) {
2708 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2709 inet_ntop(request->proxy->dst_ipaddr.af,
2710 &request->proxy->dst_ipaddr.ipaddr,
2711 buffer, sizeof(buffer)),
2712 request->proxy->dst_port,
2713 request->proxy->id);
2718 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2719 inet_ntop(request->proxy->dst_ipaddr.af,
2720 &request->proxy->dst_ipaddr.ipaddr,
2721 buffer, sizeof(buffer)),
2722 request->proxy->dst_port,
2723 request->proxy->id);
2724 request->num_proxied_requests++;
2726 DEBUG_PACKET(request, request->proxy, 1);
2727 request->proxy_listener->send(request->proxy_listener,
2732 case REQUEST_REJECT_DELAY:
2733 RDEBUG2("Waiting to send Access-Reject "
2734 "to client %s port %d - ID: %d",
2736 request->packet->src_port, request->packet->id);
2739 case REQUEST_CLEANUP_DELAY:
2741 if (request->reply->code == 0) {
2742 RDEBUG2("Ignoring retransmit from client %s port %d "
2743 "- ID: %d, no reply was configured",
2745 request->packet->src_port, request->packet->id);
2750 * FIXME: This sends duplicate replies to
2751 * accounting requests, even if Acct-Delay-Time
2752 * or Event-Timestamp is in the packet. In those
2753 * cases, the Id should be changed, and the packet
2756 RDEBUG2("Sending duplicate reply "
2757 "to client %s port %d - ID: %d",
2759 request->packet->src_port, request->packet->id);
2760 DEBUG_PACKET(request, request->reply, 1);
2761 request->listener->send(request->listener, request);
2767 static void received_conflicting_request(REQUEST *request,
2768 const RADCLIENT *client)
2770 radlog(L_ERR, "Received conflicting packet from "
2771 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2773 request->packet->src_port, request->packet->id,
2777 * Nuke it from the request hash, so we can receive new
2780 remove_from_request_hash(request);
2782 switch (request->child_state) {
2784 * Tell it to stop, and wait for it to do so.
2787 request->master_state = REQUEST_STOP_PROCESSING;
2788 request->delay += request->delay >> 1;
2790 tv_add(&request->when, request->delay);
2792 INSERT_EVENT(wait_for_child_to_die, request);
2796 * Catch race conditions. It may have switched
2797 * from running to done while this code is being
2800 case REQUEST_REJECT_DELAY:
2801 case REQUEST_CLEANUP_DELAY:
2808 static int can_handle_new_request(RADIUS_PACKET *packet,
2810 struct main_config_t *root)
2813 * Count the total number of requests, to see if
2814 * there are too many. If so, return with an
2817 if (root->max_requests) {
2818 int request_count = fr_packet_list_num_elements(pl);
2821 * This is a new request. Let's see if
2822 * it makes us go over our configured
2825 if (request_count > root->max_requests) {
2826 radlog(L_ERR, "Dropping request (%d is too many): "
2827 "from client %s port %d - ID: %d", request_count,
2829 packet->src_port, packet->id);
2830 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2831 "\tThe value for 'max_requests' is probably set too low.\n");
2833 } /* else there were a small number of requests */
2834 } /* else there was no configured limit for requests */
2837 * FIXME: Add per-client checks. If one client is sending
2838 * too many packets, start discarding them.
2840 * We increment the counters here, and decrement them
2841 * when the response is sent... somewhere in this file.
2845 * FUTURE: Add checks for system load. If the system is
2846 * busy, start dropping requests...
2848 * We can probably keep some statistics ourselves... if
2849 * there are more requests coming in than we can handle,
2850 * start dropping some.
2857 int received_request(rad_listen_t *listener,
2858 RADIUS_PACKET *packet, REQUEST **prequest,
2861 RADIUS_PACKET **packet_p;
2862 REQUEST *request = NULL;
2863 struct main_config_t *root = &mainconfig;
2865 packet_p = fr_packet_list_find(pl, packet);
2867 request = fr_packet2myptr(REQUEST, packet, packet_p);
2868 rad_assert(request->in_request_hash);
2870 if ((request->packet->data_len == packet->data_len) &&
2871 (memcmp(request->packet->vector, packet->vector,
2872 sizeof(packet->vector)) == 0)) {
2873 received_retransmit(request, client);
2878 * The new request is different from the old one,
2879 * but maybe the old is finished. If so, delete
2882 switch (request->child_state) {
2883 struct timeval when;
2887 * Special hacks for race conditions.
2888 * The reply is encoded, and therefore
2889 * likely sent. We received a *new*
2890 * packet from the client, likely before
2891 * the next line or two of code which
2892 * updated the child state. In this
2893 * case, just accept the new request.
2895 if ((request->reply->code != 0) &&
2896 request->reply->data) {
2897 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2899 packet->src_port, packet->id,
2901 remove_from_request_hash(request);
2906 gettimeofday(&when, NULL);
2910 * If the cached request was received
2911 * within the last second, then we
2912 * discard the NEW request instead of the
2913 * old one. This will happen ONLY when
2914 * the client is severely broken, and is
2915 * sending conflicting packets very
2918 if (timercmp(&when, &request->received, <)) {
2919 radlog(L_ERR, "Discarding conflicting packet from "
2920 "client %s port %d - ID: %d due to recent request %d.",
2922 packet->src_port, packet->id,
2927 received_conflicting_request(request, client);
2931 case REQUEST_REJECT_DELAY:
2932 case REQUEST_CLEANUP_DELAY:
2933 request->child_state = REQUEST_DONE;
2935 cleanup_delay(request);
2942 * We may want to quench the new request.
2944 if ((listener->type != RAD_LISTEN_DETAIL) &&
2945 !can_handle_new_request(packet, client, root)) {
2950 * Create and initialize the new request.
2952 request = request_alloc(); /* never fails */
2954 if ((request->reply = rad_alloc(0)) == NULL) {
2955 radlog(L_ERR, "No memory");
2959 request->listener = listener;
2960 request->client = client;
2961 request->packet = packet;
2962 request->packet->timestamp = request->timestamp;
2963 request->number = request_num_counter++;
2964 request->priority = listener->type;
2965 #ifdef HAVE_PTHREAD_H
2966 request->child_pid = NO_SUCH_CHILD_PID;
2970 * Status-Server packets go to the head of the queue.
2972 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2975 * Set virtual server identity
2977 if (client->server) {
2978 request->server = client->server;
2979 } else if (listener->server) {
2980 request->server = listener->server;
2982 request->server = NULL;
2986 * Remember the request in the list.
2988 if (!fr_packet_list_insert(pl, &request->packet)) {
2989 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2990 ev_request_free(&request);
2994 request->in_request_hash = TRUE;
2995 request->root = root;
2998 request->listener->count++;
3002 * The request passes many of our sanity checks.
3003 * From here on in, if anything goes wrong, we
3004 * send a reject message, instead of dropping the
3009 * Build the reply template from the request.
3012 request->reply->sockfd = request->packet->sockfd;
3013 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3014 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3015 request->reply->dst_port = request->packet->src_port;
3016 request->reply->src_port = request->packet->dst_port;
3017 request->reply->id = request->packet->id;
3018 request->reply->code = 0; /* UNKNOWN code */
3019 memcpy(request->reply->vector, request->packet->vector,
3020 sizeof(request->reply->vector));
3021 request->reply->vps = NULL;
3022 request->reply->data = NULL;
3023 request->reply->data_len = 0;
3025 request->master_state = REQUEST_ACTIVE;
3026 request->child_state = REQUEST_QUEUED;
3027 request->next_callback = NULL;
3029 gettimeofday(&request->received, NULL);
3030 request->timestamp = request->received.tv_sec;
3031 request->when = request->received;
3033 request->delay = USEC;
3035 tv_add(&request->when, request->delay);
3037 INSERT_EVENT(wait_a_bit, request);
3039 *prequest = request;
3045 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3051 * Also removes from the proxy hash if responses == requests
3053 request = lookup_in_proxy_hash(packet);
3056 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3057 inet_ntop(packet->src_ipaddr.af,
3058 &packet->src_ipaddr.ipaddr,
3059 buffer, sizeof(buffer)),
3060 packet->src_port, packet->id);
3065 * We haven't replied to the NAS, but we have seen an
3066 * earlier reply from the home server. Ignore this packet,
3067 * as we're likely still processing the previous reply.
3069 if (request->proxy_reply) {
3070 if (memcmp(request->proxy_reply->vector,
3072 sizeof(request->proxy_reply->vector)) == 0) {
3073 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
3074 inet_ntop(packet->src_ipaddr.af,
3075 &packet->src_ipaddr.ipaddr,
3076 buffer, sizeof(buffer)),
3077 packet->src_port, packet->id,
3081 * ? The home server gave us a new proxy
3082 * reply which doesn't match the old
3085 RDEBUG2("Ignoring conflicting proxy reply");
3088 /* assert that there's an event queued for request? */
3093 * Verify the packet before doing ANYTHING with it. This
3094 * means we're doing more MD5 checks in the server core.
3095 * However, we can fix that by moving to multiple threads
3096 * listening on sockets.
3098 * We do this AFTER looking the request up in the hash,
3099 * and AFTER vhecking if we saw a previous request. This
3100 * helps minimize the DoS effect of people attacking us
3101 * with spoofed packets.
3103 if (rad_verify(packet, request->proxy,
3104 request->home_server->secret) != 0) {
3105 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3109 gettimeofday(&now, NULL);
3112 * Maybe move this earlier in the decision process?
3113 * Having it here means that late or duplicate proxy
3114 * replies no longer get the home server marked as
3115 * "alive". This might be good for stability, though.
3117 * FIXME: Do we really want to do this whenever we
3118 * receive a packet? Setting this here means that we
3119 * mark it alive on *any* packet, even if it's lost all
3120 * of the *other* packets in the last 10s.
3122 request->home_server->state = HOME_STATE_ALIVE;
3126 * When originating CoA, the "proxy" reply is the reply
3127 * to the CoA request that we originated. At this point,
3128 * the original request is finished, and it has a reply.
3130 * However, if we haven't separated the two requests, do
3131 * so now. This is done so that cleaning up the original
3132 * request won't cause the CoA request to be free'd. See
3133 * util.c, request_free()
3135 if (request->parent && (request->parent->coa == request)) {
3136 request->parent->coa = NULL;
3137 request->parent = NULL;
3141 * Skip the next set of checks, as the original
3142 * reply is cached. We want to be able to still
3143 * process the CoA reply, AND to reference the
3144 * original request/reply.
3146 * This is getting to be really quite a bit of a
3152 * If there's a reply to the NAS, ignore everything
3153 * related to proxy responses
3155 if (request->reply && request->reply->code != 0) {
3156 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3162 * The average includes our time to receive packets and
3163 * look them up in the hashes, which should be the same
3166 * We update the response time only for the FIRST packet
3169 if (request->home_server->ema.window > 0) {
3170 radius_stats_ema(&request->home_server->ema,
3171 &now, &request->proxy_when);
3175 switch (request->child_state) {
3176 case REQUEST_QUEUED:
3177 case REQUEST_RUNNING:
3178 radlog(L_ERR, "Internal sanity check failed for child state");
3181 case REQUEST_REJECT_DELAY:
3182 case REQUEST_CLEANUP_DELAY:
3184 radlog(L_ERR, "Reply from home server %s port %d - ID: %d arrived too late for request %d. Try increasing 'retry_delay' or 'max_request_time'",
3185 inet_ntop(packet->src_ipaddr.af,
3186 &packet->src_ipaddr.ipaddr,
3187 buffer, sizeof(buffer)),
3188 packet->src_port, packet->id,
3190 /* assert that there's an event queued for request? */
3193 case REQUEST_PROXIED:
3197 request->proxy_reply = packet;
3201 * Perform RTT calculations, as per RFC 2988 (for TCP).
3202 * Note that we only do so on the first response.
3204 if ((request->num_proxied_responses == 1)
3206 home_server *home = request->home_server;
3208 rtt = now.tv_sec - request->proxy_when.tv_sec;
3211 rtt -= request->proxy_when.tv_usec;
3213 if (!home->has_rtt) {
3214 home->has_rtt = TRUE;
3217 home->rttvar = rtt / 2;
3220 home->rttvar -= home->rttvar >> 2;
3221 home->rttvar += (home->srtt - rtt);
3222 home->srtt -= home->srtt >> 3;
3223 home->srtt += rtt >> 3;
3226 home->rto = home->srtt;
3227 if (home->rttvar > (USEC / 4)) {
3228 home->rto += home->rttvar * 4;
3236 * There's no incoming request, so it's a proxied packet
3239 if (!request->packet) {
3240 received_response_to_ping(request);
3241 request->proxy_reply = NULL; /* caller will free it */
3242 ev_request_free(&request);
3246 request->child_state = REQUEST_QUEUED;
3247 request->when = now;
3248 request->delay = USEC;
3249 request->priority = RAD_LISTEN_PROXY;
3250 tv_add(&request->when, request->delay);
3253 * Wait a bit will take care of max_request_time
3255 INSERT_EVENT(wait_a_bit, request);
3260 #endif /* WITH_PROXY */
3263 static void tcp_socket_lifetime(void *ctx)
3265 rad_listen_t *listener = ctx;
3268 listener->print(listener, buffer, sizeof(buffer));
3270 DEBUG("Reached maximum lifetime on socket %s", buffer);
3272 listener->status = RAD_LISTEN_STATUS_CLOSED;
3273 event_new_fd(listener);
3276 static void tcp_socket_idle_timeout(void *ctx)
3278 rad_listen_t *listener = ctx;
3279 listen_socket_t *sock = listener->data;
3282 fr_event_now(el, &now); /* should always succeed... */
3284 rad_assert(sock->home != NULL);
3287 * We implement idle timeout by polling, because it's
3288 * cheaper than resetting the idle timeout every time
3289 * we send / receive a packet.
3291 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3292 struct timeval when;
3293 void *fun = tcp_socket_idle_timeout;
3295 when.tv_sec = sock->last_packet;
3296 when.tv_sec += sock->home->idle_timeout;
3299 if (sock->home->lifetime &&
3300 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3301 when.tv_sec = sock->opened + sock->home->lifetime;
3302 fun = tcp_socket_lifetime;
3305 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3306 rad_panic("Failed to insert event");
3312 listener->print(listener, buffer, sizeof(buffer));
3314 DEBUG("Reached idle timeout on socket %s", buffer);
3316 listener->status = RAD_LISTEN_STATUS_CLOSED;
3317 event_new_fd(listener);
3321 void event_new_fd(rad_listen_t *this)
3325 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3327 this->print(this, buffer, sizeof(buffer));
3329 if (this->status == RAD_LISTEN_STATUS_INIT) {
3331 DEBUG("Listening on %s", buffer);
3333 DEBUG2(" ... adding new socket %s", buffer);
3338 * Add it to the list of sockets we can use.
3339 * Server sockets (i.e. auth/acct) are never
3340 * added to the packet list.
3342 if (this->type == RAD_LISTEN_PROXY) {
3343 listen_socket_t *sock = this->data;
3345 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3346 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3348 &sock->other_ipaddr, sock->other_port,
3350 radlog(L_ERR, "Fatal error adding socket: %s",
3357 sock->home->num_connections++;
3360 * If necessary, add it to the list of
3361 * new proxy listeners.
3363 if (sock->home->lifetime || sock->home->idle_timeout) {
3364 this->next = proxy_listener_list;
3365 proxy_listener_list = this;
3368 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3371 * Tell the main thread that we've added
3372 * a proxy listener, but only if we need
3373 * to update the event list. Do this
3374 * with the mutex unlocked, to reduce
3378 if (sock->home->lifetime || sock->home->idle_timeout) {
3379 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3387 * Detail files are always known, and aren't
3388 * put into the socket event loop.
3390 if (this->type == RAD_LISTEN_DETAIL) {
3391 this->status = RAD_LISTEN_STATUS_KNOWN;
3394 * Set up the first poll interval.
3396 event_poll_detail(this);
3401 FD_MUTEX_LOCK(&fd_mutex);
3402 if (!fr_event_fd_insert(el, 0, this->fd,
3403 event_socket_handler, this)) {
3404 radlog(L_ERR, "Failed remembering handle for proxy socket!");
3407 FD_MUTEX_UNLOCK(&fd_mutex);
3409 this->status = RAD_LISTEN_STATUS_KNOWN;
3414 * Something went wrong with the socket: make it harmless.
3416 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3420 * Remove it from the list of live FD's.
3422 FD_MUTEX_LOCK(&fd_mutex);
3423 fr_event_fd_delete(el, 0, this->fd);
3424 FD_MUTEX_UNLOCK(&fd_mutex);
3427 if (this->type != RAD_LISTEN_PROXY)
3430 if (this->count != 0) {
3431 fr_packet_list_walk(pl, this,
3432 remove_all_requests);
3435 if (this->count == 0) {
3436 this->status = RAD_LISTEN_STATUS_FINISH;
3442 int count = this->count;
3447 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3448 if (!fr_packet_list_socket_freeze(proxy_list,
3450 radlog(L_ERR, "Fatal error freezing socket: %s",
3456 * Doing this with the proxy mutex held
3457 * is a Bad Thing. We should move to
3458 * finer-grained mutexes.
3460 count = this->count;
3462 fr_packet_list_walk(proxy_list, this,
3463 remove_all_proxied_requests);
3465 count = this->count; /* protected by mutex */
3466 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3469 this->status = RAD_LISTEN_STATUS_FINISH;
3476 * Re-open the socket, pointing it to /dev/null.
3477 * This means that all writes proceed without
3478 * blocking, and all reads return "no data".
3480 * This leaves the socket active, so any child
3481 * threads won't go insane. But it means that
3482 * they cannot send or receive any packets.
3484 * This is EXTRA work in the normal case, when
3485 * sockets are closed without error. But it lets
3486 * us have one simple processing method for all
3489 devnull = open("/dev/null", O_RDWR);
3491 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3495 if (dup2(devnull, this->fd) < 0) {
3496 radlog(L_ERR, "FATAL failure closing socket: %s",
3502 this->status = RAD_LISTEN_STATUS_CLOSED;
3505 * Fall through to the next section.
3510 * Called ONLY from the main thread. On the following
3516 * (and falling through from "forcibly close FD" above)
3517 * client closed connection on us
3518 * client sent us a bad packet.
3520 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3521 int count = this->count;
3522 rad_assert(this->type != RAD_LISTEN_DETAIL);
3526 * Remove it from the list of active sockets, so
3527 * that it isn't used when proxying new packets.
3529 if (this->type == RAD_LISTEN_PROXY) {
3530 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3531 if (!fr_packet_list_socket_freeze(proxy_list,
3533 radlog(L_ERR, "Fatal error freezing socket: %s",
3537 count = this->count; /* protected by mutex */
3538 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3543 * Requests are still using the socket. Wait for
3547 struct timeval when;
3548 listen_socket_t *sock = this->data;
3551 * Try again to clean up the socket in 30
3554 gettimeofday(&when, NULL);
3557 if (!fr_event_insert(el,
3558 (fr_event_callback_t) event_new_fd,
3559 this, &when, &sock->ev)) {
3560 rad_panic("Failed to insert event");
3567 * No one is using this socket: we can delete it
3570 this->status = RAD_LISTEN_STATUS_FINISH;
3574 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3575 listen_socket_t *sock = this->data;
3577 rad_assert(this->count == 0);
3578 DEBUG2(" ... closing socket %s", buffer);
3581 * Remove it from the list of live FD's. Note
3582 * that it MAY also have been removed above. We
3583 * do it again here, to catch the case of sockets
3584 * closing on idle timeout, or max
3585 * lifetime... AFTER all requests have finished
3588 FD_MUTEX_LOCK(&fd_mutex);
3589 fr_event_fd_delete(el, 0, this->fd);
3590 FD_MUTEX_UNLOCK(&fd_mutex);
3594 * Remove it from the list of sockets to be used
3597 if (this->type == RAD_LISTEN_PROXY) {
3598 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3599 if (!fr_packet_list_socket_remove(proxy_list,
3601 radlog(L_ERR, "Fatal error removing socket: %s",
3605 if (sock->home) sock->home->num_connections--;
3606 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3611 * Remove any pending cleanups.
3613 if (sock->ev) fr_event_delete(el, &sock->ev);
3616 * And finally, close the socket.
3622 static void handle_signal_self(int flag)
3624 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3625 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3626 fr_event_loop_exit(el, 1);
3628 fr_event_loop_exit(el, 2);
3632 } /* else exit/term flags weren't set */
3635 * Tell the even loop to stop processing.
3637 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3639 static time_t last_hup = 0;
3641 DEBUG("Received HUP signal.");
3644 if ((int) (when - last_hup) < 5) {
3645 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3650 fr_event_loop_exit(el, 0x80);
3654 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3658 * FIXME: O(N) loops suck.
3660 for (this = mainconfig.listen;
3662 this = this->next) {
3663 if (this->type != RAD_LISTEN_DETAIL) continue;
3666 * This one didn't send the signal, skip
3669 if (!this->decode(this, NULL)) continue;
3672 * Go service the interrupt.
3674 event_poll_detail(this);
3681 * Add event handlers for idle timeouts && maximum lifetime.XXX
3683 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3684 struct timeval when;
3687 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3689 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3691 while (proxy_listener_list) {
3692 rad_listen_t *this = proxy_listener_list;
3693 listen_socket_t *sock = this->data;
3695 proxy_listener_list = this->next;
3698 if (!sock->home) continue; /* skip UDP sockets */
3702 if (!sock->home->idle_timeout) {
3703 rad_assert(sock->home->lifetime != 0);
3705 when.tv_sec += sock->home->lifetime;
3706 fun = tcp_socket_lifetime;
3708 rad_assert(sock->home->idle_timeout != 0);
3710 when.tv_sec += sock->home->idle_timeout;
3711 fun = tcp_socket_idle_timeout;
3714 if (!fr_event_insert(el, fun, this, &when,
3716 rad_panic("Failed to insert event");
3720 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3725 #ifndef WITH_SELF_PIPE
3726 void radius_signal_self(int flag)
3728 handle_signal_self(flag);
3732 * Inform ourselves that we received a signal.
3734 void radius_signal_self(int flag)
3740 * The read MUST be non-blocking for this to work.
3742 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3746 for (i = 0; i < rcode; i++) {
3747 buffer[0] |= buffer[i];
3755 write(self_pipe[1], buffer, 1);
3759 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3760 UNUSED int fd, UNUSED void *ctx)
3765 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3766 if (rcode <= 0) return;
3769 * Merge pending signals.
3771 for (i = 0; i < rcode; i++) {
3772 buffer[0] |= buffer[i];
3775 handle_signal_self(buffer[0]);
3780 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3783 rad_listen_t *listener = ctx;
3784 RAD_REQUEST_FUNP fun;
3787 rad_assert(xel == el);
3791 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3793 if (!listener->recv(listener, &fun, &request)) return;
3795 if (!thread_pool_addrequest(request, fun)) {
3796 request->child_state = REQUEST_DONE;
3800 typedef struct listen_detail_t {
3805 * This function is called periodically to see if this detail
3806 * file is available for reading.
3808 static void event_poll_detail(void *ctx)
3811 RAD_REQUEST_FUNP fun;
3813 rad_listen_t *this = ctx;
3814 struct timeval when;
3815 listen_detail_t *detail = this->data;
3817 rad_assert(this->type == RAD_LISTEN_DETAIL);
3820 * Try to read something.
3822 * FIXME: This does poll AND receive.
3824 rcode = this->recv(this, &fun, &request);
3826 rad_assert(fun != NULL);
3827 rad_assert(request != NULL);
3829 if (!thread_pool_addrequest(request, fun)) {
3830 request->child_state = REQUEST_DONE;
3834 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3838 * Backdoor API to get the delay until the next poll
3841 delay = this->encode(this, NULL);
3842 tv_add(&when, delay);
3844 if (!fr_event_insert(el, event_poll_detail, this,
3845 &when, &detail->ev)) {
3846 radlog(L_ERR, "Failed creating handler");
3852 static void event_status(struct timeval *wake)
3854 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3858 if (debug_flag == 0) {
3860 radlog(L_INFO, "Ready to process requests.");
3861 just_started = FALSE;
3867 DEBUG("Ready to process requests.");
3869 } else if ((wake->tv_sec != 0) ||
3870 (wake->tv_usec >= 100000)) {
3871 DEBUG("Waking up in %d.%01u seconds.",
3872 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3877 * FIXME: Put this somewhere else, where it isn't called
3878 * all of the time...
3881 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3883 * If there are no child threads, then there may
3884 * be child processes. In that case, wait for
3885 * their exit status, and throw that exit status
3886 * away. This helps get rid of zxombie children.
3888 while (waitpid(-1, &argval, WNOHANG) > 0) {
3896 * Externally-visibly functions.
3898 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3900 rad_listen_t *head = NULL;
3904 time(&fr_start_time);
3906 el = fr_event_list_create(event_status);
3909 pl = fr_packet_list_create(0);
3910 if (!pl) return 0; /* leak el */
3912 request_num_counter = 0;
3915 if (mainconfig.proxy_requests) {
3916 pthread_mutexattr_t attr;
3919 * Create the tree for managing proxied requests and
3922 proxy_list = fr_packet_list_create(1);
3923 if (!proxy_list) return 0;
3925 #ifdef HAVE_PTHREAD_H
3926 pthread_mutexattr_init(&attr);
3928 #ifdef PTHREAD_MUTEX_RECURSIVE
3929 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3930 radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3936 if (pthread_mutex_init(&proxy_mutex, &attr) != 0) {
3937 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3942 pthread_mutexattr_destroy(&attr);
3948 * Just before we spawn the child threads, force the log
3949 * subsystem to re-open the log file for every write.
3951 if (spawn_flag) force_log_reopen();
3953 #ifdef HAVE_PTHREAD_H
3955 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3957 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3960 * Initialize the threads ONLY if we're spawning, AND
3961 * we're running normally.
3963 if (spawn_flag && !check_config &&
3964 (thread_pool_init(cs, &spawn_flag) < 0)) {
3970 * Move all of the thread calls to this file?
3972 * It may be best for the mutexes to be in this file...
3974 have_children = spawn_flag;
3977 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3982 #ifdef WITH_SELF_PIPE
3984 * Child threads need a pipe to signal us, as do the
3987 if (pipe(self_pipe) < 0) {
3988 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3992 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3993 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3997 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3998 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4003 if (!fr_event_fd_insert(el, 0, self_pipe[0],
4004 event_signal_handler, el)) {
4005 radlog(L_ERR, "Failed creating handler for signals");
4008 #endif /* WITH_SELF_PIPE */
4010 DEBUG("%s: #### Opening IP addresses and Ports ####",
4014 * The server temporarily switches to an unprivileged
4015 * user very early in the bootstrapping process.
4016 * However, some sockets MAY require privileged access
4017 * (bind to device, or to port < 1024, or to raw
4018 * sockets). Those sockets need to call suid up/down
4019 * themselves around the functions that need a privileged
4022 if (listen_init(cs, &head) < 0) {
4026 mainconfig.listen = head;
4029 * At this point, no one has any business *ever* going
4032 fr_suid_down_permanent();
4038 static int request_hash_cb(UNUSED void *ctx, void *data)
4040 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4043 rad_assert(request->in_proxy_hash == FALSE);
4046 ev_request_free(&request);
4053 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4055 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4057 ev_request_free(&request);
4063 void radius_event_free(void)
4066 * FIXME: Stop all threads, or at least check that
4067 * they're all waiting on the semaphore, and the queues
4073 * There are requests in the proxy hash that aren't
4074 * referenced from anywhere else. Remove them first.
4077 PTHREAD_MUTEX_LOCK(&proxy_mutex);
4078 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4079 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
4080 fr_packet_list_free(proxy_list);
4085 fr_packet_list_walk(pl, NULL, request_hash_cb);
4087 fr_packet_list_free(pl);
4090 fr_event_list_free(el);
4093 int radius_event_process(void)
4097 return fr_event_loop(el);
4100 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4102 request->options = RAD_REQUEST_OPTION_DEBUG2;
4104 if (request_pre_handler(request)) {
4105 rad_assert(fun != NULL);
4106 rad_assert(request != NULL);
4108 if (request->server) RDEBUG("server %s {",
4109 request->server != NULL ?
4110 request->server : "");
4113 if (request->server) RDEBUG("} # server %s",
4114 request->server != NULL ?
4115 request->server : "");
4117 request_post_handler(request);
4120 DEBUG2("Going to the next request");