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);
485 * If it's still queued (waiting for a thread to pick it
486 * up) OR, it's running AND there's still a child thread
487 * handling it, THEN delay some more.
489 if ((request->child_state == REQUEST_QUEUED) ||
490 ((request->child_state == REQUEST_RUNNING) &&
491 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0))) {
494 * Cap delay at five minutes.
496 if (request->delay < (USEC * 60 * 5)) {
497 request->delay += (request->delay >> 1);
498 radlog_request(L_INFO, 0, request, "WARNING: Child is hung in component %s module %s.",
499 request->component, request->module);
501 RDEBUG2("Child is still stuck");
503 tv_add(&request->when, request->delay);
505 INSERT_EVENT(wait_for_child_to_die, request);
509 RDEBUG2("Child is finally responsive");
510 remove_from_request_hash(request);
513 if (request->proxy) {
514 wait_for_proxy_id_to_expire(request);
519 ev_request_free(&request);
523 static void cleanup_delay(void *ctx)
525 REQUEST *request = ctx;
527 rad_assert(request->magic == REQUEST_MAGIC);
528 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
529 (request->child_state == REQUEST_DONE));
531 remove_from_request_hash(request);
534 if (request->proxy && request->in_proxy_hash) {
535 wait_for_proxy_id_to_expire(request);
540 RDEBUG2("Cleaning up request packet ID %d with timestamp +%d",
542 (unsigned int) (request->timestamp - fr_start_time));
544 ev_request_free(&request);
549 * In daemon mode, AND this request has debug flags set.
551 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
553 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
557 const char *received, *from;
558 const fr_ipaddr_t *ip;
563 rad_assert(request->radlog != NULL);
565 if (direction == 0) {
566 received = "Received";
567 from = "from"; /* what else? */
568 ip = &packet->src_ipaddr;
569 port = packet->src_port;
572 received = "Sending";
573 from = "to"; /* hah! */
574 ip = &packet->dst_ipaddr;
575 port = packet->dst_port;
579 * Client-specific debugging re-prints the input
580 * packet into the client log.
582 * This really belongs in a utility library
584 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
585 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
586 received, fr_packet_codes[packet->code], from,
587 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
588 port, packet->id, packet->data_len);
590 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
592 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
594 packet->code, packet->id, packet->data_len);
597 for (vp = packet->vps; vp != NULL; vp = vp->next) {
598 vp_prints(buffer, sizeof(buffer), vp);
599 request->radlog(L_DBG, 0, request, "\t%s", buffer);
603 static void reject_delay(void *ctx)
605 REQUEST *request = ctx;
607 rad_assert(request->magic == REQUEST_MAGIC);
608 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
610 RDEBUG2("Sending delayed reject");
612 DEBUG_PACKET(request, request->reply, 1);
614 request->listener->send(request->listener, request);
616 request->when.tv_sec += request->root->cleanup_delay;
617 request->child_state = REQUEST_CLEANUP_DELAY;
619 INSERT_EVENT(cleanup_delay, request);
624 void revive_home_server(void *ctx)
626 home_server *home = ctx;
630 rad_assert(home->proto != IPPROTO_TCP);
633 home->state = HOME_STATE_ALIVE;
634 home->currently_outstanding = 0;
635 home->revive_time = now;
638 * Delete any outstanding events.
640 if (home->ev) fr_event_delete(el, &home->ev);
642 radlog(L_PROXY, "Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
643 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
644 buffer, sizeof(buffer)),
650 static void no_response_to_ping(void *ctx)
652 REQUEST *request = ctx;
656 rad_assert(request->home_server != NULL);
658 home = request->home_server;
660 rad_assert(home->proto != IPPROTO_TCP);
663 home->num_received_pings = 0;
665 radlog(L_ERR, "No response to status check %d for home server %s port %d",
667 inet_ntop(request->proxy->dst_ipaddr.af,
668 &request->proxy->dst_ipaddr.ipaddr,
669 buffer, sizeof(buffer)),
670 request->proxy->dst_port);
672 check_for_zombie_home_server(request);
674 wait_for_proxy_id_to_expire(request);
679 * Note that we don't care what the value of the code field is.
680 * If the response has a valid (src ip/port, dst ip/port), id,
681 * and correctly signed Message-Authenticator, that's good
684 static void received_response_to_ping(REQUEST *request)
689 rad_assert(request->home_server != NULL);
691 home = request->home_server;
693 rad_assert(home->proto != IPPROTO_TCP);
696 home->num_received_pings++;
698 radlog(L_PROXY, "Received response to status check %d (%d in current sequence)",
699 request->number, home->num_received_pings);
702 * Remove the request from any hashes
704 fr_event_delete(el, &request->ev);
705 remove_from_proxy_hash(request);
706 rad_assert(request->in_request_hash == FALSE);
709 * The control socket may have marked the home server as
710 * alive. OR, it may have suddenly started responding to
711 * requests again. If so, don't re-do the "make alive"
714 if (home->state == HOME_STATE_ALIVE) return;
717 * We haven't received enough ping responses to mark it
718 * "alive". Wait a bit.
720 if (home->num_received_pings < home->num_pings_to_alive) {
724 home->state = HOME_STATE_ALIVE;
725 home->currently_outstanding = 0;
726 home->revive_time = now;
728 if (!fr_event_delete(el, &home->ev)) {
729 RDEBUG2("Hmm... no event for home server. Oh well.");
732 radlog(L_PROXY, "Marking home server %s port %d alive",
733 inet_ntop(request->proxy->dst_ipaddr.af,
734 &request->proxy->dst_ipaddr.ipaddr,
735 buffer, sizeof(buffer)),
736 request->proxy->dst_port);
741 * Called from start of zombie period, OR after control socket
742 * marks the home server dead.
744 static void ping_home_server(void *ctx)
747 home_server *home = ctx;
752 rad_assert(home->proto != IPPROTO_TCP);
755 if ((home->state == HOME_STATE_ALIVE) ||
756 (home->ping_check == HOME_PING_CHECK_NONE) ||
757 (home->ev != NULL)) {
761 request = request_alloc();
762 request->number = request_num_counter++;
764 request->proxy = rad_alloc(1);
765 rad_assert(request->proxy != NULL);
767 fr_event_now(el, &request->when);
768 home->when = request->when;
770 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
771 request->proxy->code = PW_STATUS_SERVER;
773 radius_pairmake(request, &request->proxy->vps,
774 "Message-Authenticator", "0x00", T_OP_SET);
776 } else if (home->type == HOME_TYPE_AUTH) {
777 request->proxy->code = PW_AUTHENTICATION_REQUEST;
779 radius_pairmake(request, &request->proxy->vps,
780 "User-Name", home->ping_user_name, T_OP_SET);
781 radius_pairmake(request, &request->proxy->vps,
782 "User-Password", home->ping_user_password, T_OP_SET);
783 radius_pairmake(request, &request->proxy->vps,
784 "Service-Type", "Authenticate-Only", T_OP_SET);
785 radius_pairmake(request, &request->proxy->vps,
786 "Message-Authenticator", "0x00", T_OP_SET);
789 #ifdef WITH_ACCOUNTING
790 request->proxy->code = PW_ACCOUNTING_REQUEST;
792 radius_pairmake(request, &request->proxy->vps,
793 "User-Name", home->ping_user_name, T_OP_SET);
794 radius_pairmake(request, &request->proxy->vps,
795 "Acct-Status-Type", "Stop", T_OP_SET);
796 radius_pairmake(request, &request->proxy->vps,
797 "Acct-Session-Id", "00000000", T_OP_SET);
798 vp = radius_pairmake(request, &request->proxy->vps,
799 "Event-Timestamp", "0", T_OP_SET);
800 vp->vp_date = now.tv_sec;
802 rad_assert("Internal sanity check failed");
806 radius_pairmake(request, &request->proxy->vps,
807 "NAS-Identifier", "Status Check. Are you alive?",
810 request->proxy->dst_ipaddr = home->ipaddr;
811 request->proxy->dst_port = home->port;
812 request->home_server = home;
814 rad_assert(request->proxy_listener == NULL);
816 if (!insert_into_proxy_hash(request)) {
817 radlog(L_PROXY, "Failed inserting status check %d into proxy hash. Discarding it.",
819 ev_request_free(&request);
822 rad_assert(request->proxy_listener != NULL);
823 request->proxy_listener->send(request->proxy_listener,
826 request->next_callback = NULL;
827 request->child_state = REQUEST_PROXIED;
828 request->when.tv_sec += home->ping_timeout;;
830 INSERT_EVENT(no_response_to_ping, request);
833 * Add +/- 2s of jitter, as suggested in RFC 3539
834 * and in the Issues and Fixes draft.
836 home->when.tv_sec += home->ping_interval - 2;
839 jitter ^= (jitter >> 10);
840 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
842 tv_add(&home->when, jitter);
844 INSERT_EVENT(ping_home_server, home);
848 void mark_home_server_dead(home_server *home, struct timeval *when)
850 int previous_state = home->state;
853 radlog(L_PROXY, "Marking home server %s port %d as dead.",
854 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
855 buffer, sizeof(buffer)),
858 home->state = HOME_STATE_IS_DEAD;
859 home->num_received_pings = 0;
861 if (home->ping_check != HOME_PING_CHECK_NONE) {
863 * If the control socket marks us dead, start
864 * pinging. Otherwise, we already started
865 * pinging when it was marked "zombie".
867 if (previous_state == HOME_STATE_ALIVE) {
868 ping_home_server(home);
873 * Revive it after a fixed period of time. This
874 * is very, very, bad.
877 home->when.tv_sec += home->revive_interval;
879 INSERT_EVENT(revive_home_server, home);
883 static void check_for_zombie_home_server(REQUEST *request)
888 home = request->home_server;
890 if (home->state != HOME_STATE_ZOMBIE) return;
892 when = home->zombie_period_start;
893 when.tv_sec += home->zombie_period;
895 fr_event_now(el, &now);
896 if (timercmp(&now, &when, <)) {
900 mark_home_server_dead(home, &request->when);
903 static int proxy_to_virtual_server(REQUEST *request);
905 static int virtual_server_handler(UNUSED REQUEST *request)
907 proxy_to_virtual_server(request);
911 static void proxy_fallback_handler(REQUEST *request)
914 * A proper time is required for wait_a_bit.
916 request->delay = USEC / 10;
917 gettimeofday(&now, NULL);
918 request->next_when = now;
919 tv_add(&request->next_when, request->delay);
920 request->next_callback = wait_a_bit;
923 * Re-queue the request.
925 request->child_state = REQUEST_QUEUED;
927 rad_assert(request->proxy != NULL);
928 thread_pool_addrequest(request, virtual_server_handler);
930 #ifdef HAVE_PTHREAD_H
932 * MAY free the request if we're over max_request_time,
933 * AND we're not in threaded mode!
935 * Note that we call this ONLY if we're threaded, as
936 * if we're NOT threaded, request_post_handler() calls
937 * wait_a_bit(), which means that "request" may not
940 if (have_children) wait_a_bit(request);
945 static int setup_post_proxy_fail(REQUEST *request)
947 DICT_VALUE *dval = NULL;
950 request->child_state = REQUEST_RUNNING;
952 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
953 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-Authentication");
955 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
956 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-Accounting");
960 * See no_response_to_coa_request
962 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
963 request->packet->code &= 0xff; /* restore it */
965 if (request->proxy->code == PW_COA_REQUEST) {
966 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-CoA");
968 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
969 dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail-Disconnect");
979 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, 0, "Fail");
982 pairdelete(&request->config_items, PW_POST_PROXY_TYPE, 0);
986 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE, 0);
987 if (!vp) vp = radius_paircreate(request, &request->config_items,
988 PW_POST_PROXY_TYPE, 0, PW_TYPE_INTEGER);
989 vp->vp_integer = dval->value;
991 rad_assert(request->proxy_reply == NULL);
997 static int null_handler(UNUSED REQUEST *request)
1002 static void post_proxy_fail_handler(REQUEST *request)
1005 * A proper time is required for wait_a_bit.
1007 request->delay = USEC / 10;
1008 gettimeofday(&now, NULL);
1011 * Not set up to run Post-Proxy-Type = Fail.
1013 * Mark the request as still running, and figure out what
1016 if (!setup_post_proxy_fail(request)) {
1017 request_post_handler(request);
1021 * Re-queue the request.
1023 request->child_state = REQUEST_QUEUED;
1026 * There is a post-proxy-type of fail. We run
1027 * the request through the pre/post proxy
1028 * handlers, just like it was a real proxied
1029 * request. However, we set the per-request
1030 * handler to NULL, as we don't want to do
1033 * Note that when we're not threaded, this will
1034 * process the request even if it's greater than
1035 * max_request_time. That's not fatal.
1037 request->priority = 0;
1038 rad_assert(request->proxy != NULL);
1039 thread_pool_addrequest(request, null_handler);
1043 * MAY free the request if we're over max_request_time,
1044 * AND we're not in threaded mode!
1046 * Note that we call this ONLY if we're threaded, as
1047 * if we're NOT threaded, request_post_handler() calls
1048 * wait_a_bit(), which means that "request" may not
1051 if (have_children) wait_a_bit(request);
1054 /* maybe check this against wait_for_proxy_id_to_expire? */
1055 static void no_response_to_proxied_request(void *ctx)
1057 REQUEST *request = ctx;
1061 rad_assert(request->magic == REQUEST_MAGIC);
1063 if (request->master_state == REQUEST_STOP_PROCESSING) {
1064 ev_request_free(&request);
1068 rad_assert(request->child_state == REQUEST_PROXIED);
1071 * If we've failed over to an internal home server,
1072 * replace the callback with the correct one. This
1073 * is due to locking issues with child threads...
1075 if (request->home_server->server) {
1076 wait_a_bit(request);
1081 if (request->home_server->proto != IPPROTO_TCP)
1083 check_for_zombie_home_server(request);
1085 home = request->home_server;
1088 * The default as of 2.1.7 is to allow requests to
1089 * fail-over to a backup home server when this one does
1090 * not respond. The old behavior can be configured as
1093 if (home->no_response_fail) {
1094 radlog_request(L_ERR, 0, request, "Rejecting request (proxy Id %d) due to lack of any response from home server %s port %d",
1096 inet_ntop(request->proxy->dst_ipaddr.af,
1097 &request->proxy->dst_ipaddr.ipaddr,
1098 buffer, sizeof(buffer)),
1099 request->proxy->dst_port);
1101 post_proxy_fail_handler(request);
1104 * Enforce max_request_time.
1106 * We fail over to another backup home server
1107 * when the client re-transmits the request. If
1108 * the client doesn't re-transmit, no fail-over
1111 rad_assert(request->ev == NULL);
1112 request->child_state = REQUEST_RUNNING;
1113 wait_a_bit(request);
1117 * Don't touch request due to race conditions
1122 * Do nothing more. The home server didn't respond,
1123 * but that isn't a catastrophic failure. Some home
1124 * servers don't respond to packets...
1126 if (home->proto == IPPROTO_TCP) {
1128 * FIXME: Set up TCP pinging on this connection.
1130 * Maybe the CONNECTION is dead, but the home
1131 * server is alive. In that case, we need to start
1132 * pinging on the connection.
1134 * This means doing the pinging BEFORE the
1135 * post_proxy_fail_handler above, as it may do
1136 * something with the request, and cause the
1137 * proxy listener to go away!
1143 if (home->state == HOME_STATE_IS_DEAD) {
1144 rad_assert(home->ev != NULL); /* or it will never wake up */
1149 * Enable the zombie period when we notice that the home
1150 * server hasn't responded. We do NOT back-date the start
1151 * of the zombie period.
1153 if (home->state == HOME_STATE_ALIVE) {
1154 home->state = HOME_STATE_ZOMBIE;
1155 home->zombie_period_start = now;
1156 fr_event_delete(el, &home->ev);
1157 home->currently_outstanding = 0;
1158 home->num_received_pings = 0;
1160 radlog(L_PROXY, "Marking home server %s port %d as zombie (it looks like it is dead).",
1161 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1162 buffer, sizeof(buffer)),
1166 * Start pinging the home server.
1168 ping_home_server(home);
1173 static void wait_a_bit(void *ctx)
1175 struct timeval when;
1176 REQUEST *request = ctx;
1177 fr_event_callback_t callback = NULL;
1179 rad_assert(request->magic == REQUEST_MAGIC);
1182 * The socket was closed. Tell the request that
1183 * there is no point in continuing.
1185 if (request->listener->status != RAD_LISTEN_STATUS_KNOWN) {
1186 goto stop_processing;
1191 * The CoA request is a new (internally generated)
1192 * request, created in a child thread. We therefore need
1193 * some way to tie its events back into the main event
1196 if (request->coa && !request->coa->proxy_reply &&
1197 request->coa->next_callback) {
1198 request->coa->when = request->coa->next_when;
1199 INSERT_EVENT(request->coa->next_callback, request->coa);
1200 request->coa->next_callback = NULL;
1201 request->coa->parent = NULL;
1202 request->coa = NULL;
1206 switch (request->child_state) {
1207 case REQUEST_QUEUED:
1208 case REQUEST_RUNNING:
1209 when = request->received;
1210 when.tv_sec += request->root->max_request_time;
1213 * Normally called from the event loop with the
1214 * proper event loop time. Otherwise, called from
1215 * post proxy fail handler, which sets "now", and
1216 * this call won't re-set it, because we're not
1217 * in the event loop.
1219 fr_event_now(el, &now);
1222 * Request still has more time. Continue
1225 if (timercmp(&now, &when, <) ||
1226 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1227 (request->child_state == REQUEST_QUEUED))) {
1228 if (request->delay < (USEC / 10)) {
1229 request->delay = USEC / 10;
1231 request->delay += request->delay >> 1;
1235 * Cap wait at some sane value for detail
1238 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1239 (request->delay > (request->root->max_request_time * USEC))) {
1240 request->delay = request->root->max_request_time * USEC;
1244 request->when = now;
1245 tv_add(&request->when, request->delay);
1246 callback = wait_a_bit;
1251 #if defined(HAVE_PTHREAD_H)
1253 * A child thread MAY still be running on the
1254 * request. Ask the thread to stop working on
1257 if (have_children &&
1258 (pthread_equal(request->child_pid, NO_SUCH_CHILD_PID) == 0)) {
1259 request->master_state = REQUEST_STOP_PROCESSING;
1261 radlog_request(L_ERR, 0, request, "WARNING: Unresponsive child in module %s component %s",
1262 request->module ? request->module : "<server core>",
1263 request->component ? request->component : "<server core>");
1265 request->delay = USEC / 4;
1266 tv_add(&request->when, request->delay);
1267 callback = wait_for_child_to_die;
1273 * Else no child thread is processing the
1274 * request. We probably should have just marked
1275 * the request as 'done' elsewhere, like in the
1276 * post-proxy-fail handler. But doing that would
1277 * involve checking for max_request_time in
1278 * multiple places, so this may be simplest.
1280 request->child_state = REQUEST_DONE;
1284 * Mark the request as no longer running,
1288 #ifdef HAVE_PTHREAD_H
1289 request->child_pid = NO_SUCH_CHILD_PID;
1294 * This is a CoA request. It's been divorced
1295 * from everything else, so we clean it up now.
1297 if (!request->in_request_hash &&
1299 (request->packet->code != request->proxy->code) &&
1300 ((request->proxy->code == PW_COA_REQUEST) ||
1301 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1303 * FIXME: Do CoA MIBs
1305 ev_request_free(&request);
1309 cleanup_delay(request);
1312 case REQUEST_REJECT_DELAY:
1313 case REQUEST_CLEANUP_DELAY:
1314 #ifdef HAVE_PTHREAD_H
1315 request->child_pid = NO_SUCH_CHILD_PID;
1318 case REQUEST_PROXIED:
1319 rad_assert(request->next_callback != NULL);
1320 rad_assert(request->next_callback != wait_a_bit);
1322 request->when = request->next_when;
1323 callback = request->next_callback;
1324 request->next_callback = NULL;
1328 rad_panic("Internal sanity check failure");
1333 * Something major went wrong. Discard the request, and
1336 * FIXME: No idea why this happens or how to fix it...
1337 * It seems to happen *only* when requests are proxied,
1338 * and where the home server doesn't respond. So it looks
1339 * like a race condition above, but it happens in debug
1340 * mode, with no threads...
1343 RDEBUG("WARNING: Internal sanity check failed in event handler: Discarding the request!");
1344 ev_request_free(&request);
1348 INSERT_EVENT(callback, request);
1352 static void no_response_to_coa_request(void *ctx)
1354 REQUEST *request = ctx;
1357 rad_assert(request->magic == REQUEST_MAGIC);
1358 rad_assert(request->child_state == REQUEST_PROXIED);
1359 rad_assert(request->home_server != NULL);
1360 rad_assert(!request->in_request_hash);
1362 radlog(L_ERR, "No response to CoA request sent to %s",
1363 inet_ntop(request->proxy->dst_ipaddr.af,
1364 &request->proxy->dst_ipaddr.ipaddr,
1365 buffer, sizeof(buffer)));
1370 request->packet->code |= (PW_COA_REQUEST << 8);
1371 post_proxy_fail_handler(request);
1375 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1379 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP, 0);
1386 packet->data = NULL;
1387 packet->data_len = 0;
1390 return 1; /* time stamp updated */
1395 * Called when we haven't received a response to a CoA request.
1397 static void retransmit_coa_request(void *ctx)
1401 REQUEST *request = ctx;
1403 rad_assert(request->magic == REQUEST_MAGIC);
1404 rad_assert(request->child_state == REQUEST_PROXIED);
1405 rad_assert(request->home_server != NULL);
1406 rad_assert(!request->in_request_hash);
1407 rad_assert(request->parent == NULL);
1409 fr_event_now(el, &now);
1412 * Cap count at MRC, if it is non-zero.
1414 if (request->home_server->coa_mrc &&
1415 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1416 no_response_to_coa_request(request);
1421 * RFC 5080 Section 2.2.1
1423 * RT = 2*RTprev + RAND*RTprev
1424 * = 1.9 * RTprev + rand(0,.2) * RTprev
1425 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1428 delay ^= (delay >> 16);
1430 frac = request->delay / 5;
1431 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1433 delay += (2 * request->delay) - (request->delay / 10);
1436 * Cap delay at MRT, if MRT is non-zero.
1438 if (request->home_server->coa_mrt &&
1439 (delay > (request->home_server->coa_mrt * USEC))) {
1440 int mrt_usec = request->home_server->coa_mrt * USEC;
1443 * delay = MRT + RAND * MRT
1444 * = 0.9 MRT + rand(0,.2) * MRT
1447 delay ^= (delay >> 15);
1449 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1450 delay += mrt_usec - (mrt_usec / 10);
1453 request->delay = delay;
1454 request->when = now;
1455 tv_add(&request->when, request->delay);
1456 mrd = request->proxy_when;
1457 mrd.tv_sec += request->home_server->coa_mrd;
1460 * Cap duration at MRD.
1462 if (timercmp(&mrd, &request->when, <)) {
1463 request->when = mrd;
1464 INSERT_EVENT(no_response_to_coa_request, request);
1467 INSERT_EVENT(retransmit_coa_request, request);
1470 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1472 * Keep a copy of the old Id so that the
1473 * re-transmitted request doesn't re-use the old
1476 RADIUS_PACKET old = *request->proxy;
1477 home_server *home = request->home_server;
1478 rad_listen_t *listener = request->proxy_listener;
1481 * Don't free the old Id on error.
1483 if (!insert_into_proxy_hash(request)) {
1484 radlog(L_PROXY,"Failed re-inserting CoA request into proxy hash.");
1489 * Now that we have a new Id, free the old one
1490 * and update the various statistics.
1492 PTHREAD_MUTEX_LOCK(&proxy_mutex);
1493 fr_packet_list_yank(proxy_list, &old);
1494 fr_packet_list_id_free(proxy_list, &old);
1495 if (home) home->currently_outstanding--;
1497 if (listener) listener->count--;
1499 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
1501 } else { /* FIXME: protect by a mutex? */
1502 request->num_proxied_requests++;
1505 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1507 request->proxy_listener->send(request->proxy_listener,
1513 * The original request is either DONE, or in CLEANUP_DELAY.
1515 static int originated_coa_request(REQUEST *request)
1517 int delay, rcode, pre_proxy_type = 0;
1523 rad_assert(request->proxy == NULL);
1524 rad_assert(!request->in_proxy_hash);
1525 rad_assert(request->proxy_reply == NULL);
1528 * Check whether we want to originate one, or cancel one.
1530 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST, 0);
1531 if (!vp && request->coa) {
1532 vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST, 0);
1536 if (vp->vp_integer == 0) {
1537 ev_request_free(&request->coa);
1538 return 1; /* success */
1542 if (!request->coa) request_alloc_coa(request);
1543 if (!request->coa) return 0;
1548 * src_ipaddr will be set up in proxy_encode.
1550 memset(&ipaddr, 0, sizeof(ipaddr));
1551 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS, 0);
1553 ipaddr.af = AF_INET;
1554 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1556 } else if ((vp = pairfind(coa->proxy->vps,
1557 PW_PACKET_DST_IPV6_ADDRESS, 0)) != NULL) {
1558 ipaddr.af = AF_INET6;
1559 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1561 } else if ((vp = pairfind(coa->proxy->vps,
1562 PW_HOME_SERVER_POOL, 0)) != NULL) {
1563 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1565 if (!coa->home_pool) {
1566 RDEBUG2("WARNING: No such home_server_pool %s",
1569 ev_request_free(&request->coa);
1576 } else if (request->client->coa_pool) {
1577 coa->home_pool = request->client->coa_pool;
1579 } else if (request->client->coa_server) {
1580 coa->home_server = request->client->coa_server;
1584 * If all else fails, send it to the client that
1585 * originated this request.
1587 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1591 * Use the pool, if it exists.
1593 if (coa->home_pool) {
1594 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1595 if (!coa->home_server) {
1596 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1600 } else if (!coa->home_server) {
1601 int port = PW_COA_UDP_PORT;
1603 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT, 0);
1604 if (vp) port = vp->vp_integer;
1606 coa->home_server = home_server_find(&ipaddr, port, IPPROTO_UDP);
1607 if (!coa->home_server) {
1608 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1609 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1610 buffer, sizeof(buffer)), port);
1615 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE, 0);
1617 switch (vp->vp_integer) {
1618 case PW_COA_REQUEST:
1619 case PW_DISCONNECT_REQUEST:
1620 coa->proxy->code = vp->vp_integer;
1624 DEBUG("Cannot set CoA Packet-Type to code %d",
1630 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1633 * The rest of the server code assumes that
1634 * request->packet && request->reply exist. Copy them
1635 * from the original request.
1637 rad_assert(coa->packet != NULL);
1638 rad_assert(coa->packet->vps == NULL);
1639 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1640 coa->packet->vps = paircopy(request->packet->vps);
1641 coa->packet->data = NULL;
1642 rad_assert(coa->reply != NULL);
1643 rad_assert(coa->reply->vps == NULL);
1644 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1645 coa->reply->vps = paircopy(request->reply->vps);
1646 coa->reply->data = NULL;
1647 coa->config_items = paircopy(request->config_items);
1650 * Call the pre-proxy routines.
1652 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE, 0);
1654 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1655 pre_proxy_type = vp->vp_integer;
1658 if (coa->home_pool && coa->home_pool->virtual_server) {
1659 const char *old_server = coa->server;
1661 coa->server = coa->home_pool->virtual_server;
1662 RDEBUG2(" server %s {", coa->server);
1663 rcode = module_pre_proxy(pre_proxy_type, coa);
1665 coa->server = old_server;
1667 rcode = module_pre_proxy(pre_proxy_type, coa);
1674 * Only send the CoA packet if the pre-proxy code succeeded.
1676 case RLM_MODULE_NOOP:
1678 case RLM_MODULE_UPDATED:
1683 * Source IP / port is set when the proxy socket
1686 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1687 coa->proxy->dst_port = coa->home_server->port;
1689 if (!insert_into_proxy_hash(coa)) {
1690 radlog(L_PROXY, "Failed inserting CoA request into proxy hash.");
1695 * We CANNOT divorce the CoA request from the parent
1696 * request. This function is running in a child thread,
1697 * and we need access to the main event loop in order to
1698 * to add the timers for the CoA packet. See
1703 * Forget about the original request completely at this
1708 gettimeofday(&request->proxy_when, NULL);
1709 request->received = request->next_when = request->proxy_when;
1710 rad_assert(request->proxy_reply == NULL);
1713 * Implement re-transmit algorithm as per RFC 5080
1716 * We want IRT + RAND*IRT
1717 * or 0.9 IRT + rand(0,.2) IRT
1719 * 2^20 ~ USEC, and we want 2.
1720 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1722 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1723 request->delay = delay * request->home_server->coa_irt;
1724 delay = request->home_server->coa_irt * USEC;
1725 delay -= delay / 10;
1726 delay += request->delay;
1728 request->delay = delay;
1729 tv_add(&request->next_when, delay);
1730 request->next_callback = retransmit_coa_request;
1733 * Note that we set proxied BEFORE sending the packet.
1735 * Once we send it, the request is tainted, as
1736 * another thread may have picked it up. Don't
1739 request->child_pid = NO_SUCH_CHILD_PID;
1741 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1743 request->child_state = REQUEST_PROXIED;
1745 DEBUG_PACKET(request, request->proxy, 1);
1747 request->proxy_listener->send(request->proxy_listener,
1751 #endif /* WITH_COA */
1754 static int process_proxy_reply(REQUEST *request)
1757 int post_proxy_type = 0;
1761 * Delete any reply we had accumulated until now.
1763 pairfree(&request->reply->vps);
1766 * Run the packet through the post-proxy stage,
1767 * BEFORE playing games with the attributes.
1769 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE, 0);
1771 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1772 post_proxy_type = vp->vp_integer;
1775 if (request->home_pool && request->home_pool->virtual_server) {
1776 const char *old_server = request->server;
1778 request->server = request->home_pool->virtual_server;
1779 RDEBUG2(" server %s {", request->server);
1780 rcode = module_post_proxy(post_proxy_type, request);
1782 request->server = old_server;
1784 rcode = module_post_proxy(post_proxy_type, request);
1788 if (request->packet->code == request->proxy->code)
1790 * Don't run the next bit if we originated a CoA
1791 * packet, after receiving an Access-Request or
1792 * Accounting-Request.
1797 * There may NOT be a proxy reply, as we may be
1798 * running Post-Proxy-Type = Fail.
1800 if (request->proxy_reply) {
1802 * Delete the Proxy-State Attributes from
1803 * the reply. These include Proxy-State
1804 * attributes from us and remote server.
1806 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE, 0);
1809 * Add the attributes left in the proxy
1810 * reply to the reply list.
1812 pairadd(&request->reply->vps, request->proxy_reply->vps);
1813 request->proxy_reply->vps = NULL;
1816 * Free proxy request pairs.
1818 pairfree(&request->proxy->vps);
1822 default: /* Don't do anything */
1824 case RLM_MODULE_FAIL:
1825 /* FIXME: debug print stuff */
1826 request->child_state = REQUEST_DONE;
1829 case RLM_MODULE_HANDLED:
1830 /* FIXME: debug print stuff */
1831 request->child_state = REQUEST_DONE;
1839 static int request_pre_handler(REQUEST *request)
1843 rad_assert(request->magic == REQUEST_MAGIC);
1844 rad_assert(request->packet != NULL);
1846 request->child_state = REQUEST_RUNNING;
1849 * Don't decode the packet if it's an internal "fake"
1850 * request. Instead, just return so that the caller can
1853 if (request->packet->dst_port == 0) {
1854 request->username = pairfind(request->packet->vps,
1856 request->password = pairfind(request->packet->vps,
1857 PW_USER_PASSWORD, 0);
1863 * Put the decoded packet into it's proper place.
1865 if (request->proxy_reply != NULL) {
1866 rcode = request->proxy_listener->decode(request->proxy_listener, request);
1867 DEBUG_PACKET(request, request->proxy_reply, 0);
1870 * Pro-actively remove it from the proxy hash.
1871 * This is later than in 2.1.x, but it means that
1872 * the replies are authenticated before being
1873 * removed from the hash.
1876 (request->num_proxied_requests <= request->num_proxied_responses)) {
1877 remove_from_proxy_hash(request);
1882 if (request->packet->vps == NULL) {
1883 rcode = request->listener->decode(request->listener, request);
1885 if (debug_condition) {
1887 const char *my_debug = debug_condition;
1890 * Ignore parse errors.
1892 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1896 request->options = 2;
1897 request->radlog = radlog_request;
1901 DEBUG_PACKET(request, request->packet, 0);
1907 RDEBUG("%s Dropping packet without response.", fr_strerror());
1908 request->reply->offset = -2; /* bad authenticator */
1909 request->child_state = REQUEST_DONE;
1913 if (!request->username) {
1914 request->username = pairfind(request->packet->vps,
1919 if (request->proxy) {
1920 return process_proxy_reply(request);
1930 * Do state handling when we proxy a request.
1932 static int proxy_request(REQUEST *request)
1934 struct timeval when;
1939 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
1940 ev_request_free(&request->coa);
1944 if (request->home_server->server) {
1945 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1949 if (!insert_into_proxy_hash(request)) {
1950 radlog(L_PROXY, "Failed inserting request into proxy hash.");
1954 request->proxy_listener->encode(request->proxy_listener, request);
1956 when = request->received;
1957 when.tv_sec += request->root->max_request_time;
1959 gettimeofday(&request->proxy_when, NULL);
1961 request->next_when = request->proxy_when;
1962 request->next_when.tv_sec += request->home_server->response_window;
1964 rad_assert(request->home_server->response_window > 0);
1966 if (timercmp(&when, &request->next_when, <)) {
1967 request->next_when = when;
1969 request->next_callback = no_response_to_proxied_request;
1971 RDEBUG2("Proxying request to home server %s port %d",
1972 inet_ntop(request->proxy->dst_ipaddr.af,
1973 &request->proxy->dst_ipaddr.ipaddr,
1974 buffer, sizeof(buffer)),
1975 request->proxy->dst_port);
1978 * Note that we set proxied BEFORE sending the packet.
1980 * Once we send it, the request is tainted, as
1981 * another thread may have picked it up. Don't
1984 #ifdef HAVE_PTHREAD_H
1985 request->child_pid = NO_SUCH_CHILD_PID;
1987 request->child_state = REQUEST_PROXIED;
1989 DEBUG_PACKET(request, request->proxy, 1);
1991 request->proxy_listener->send(request->proxy_listener,
1998 * "Proxy" the request by sending it to a new virtual server.
2000 static int proxy_to_virtual_server(REQUEST *request)
2003 RAD_REQUEST_FUNP fun;
2005 if (!request->home_server || !request->home_server->server) return 0;
2007 if (request->parent) {
2008 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
2012 fake = request_alloc_fake(request);
2014 RDEBUG2("WARNING: Out of memory");
2018 fake->packet->vps = paircopy(request->proxy->vps);
2019 fake->server = request->home_server->server;
2021 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
2022 fun = rad_authenticate;
2024 #ifdef WITH_ACCOUNTING
2025 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
2026 fun = rad_accounting;
2030 RDEBUG2("Unknown packet type %d", request->proxy->code);
2031 ev_request_free(&fake);
2035 RDEBUG2(">>> Sending proxied request internally to virtual server.");
2036 radius_handle_request(fake, fun);
2037 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
2039 if (fake->reply->code != 0) {
2040 request->proxy_reply = fake->reply;
2044 * There was no response
2046 setup_post_proxy_fail(request);
2049 ev_request_free(&fake);
2051 process_proxy_reply(request);
2054 * Process it through the normal section again, but ONLY
2055 * if we received a proxy reply..
2057 if (request->proxy_reply) {
2058 if (request->server) RDEBUG("server %s {",
2059 request->server != NULL ?
2060 request->server : "");
2063 if (request->server) RDEBUG("} # server %s",
2064 request->server != NULL ?
2065 request->server : "");
2068 return 2; /* success, but NOT '1' !*/
2072 * Return 1 if we did proxy it, or the proxy attempt failed
2073 * completely. Either way, the caller doesn't touch the request
2074 * any more if we return 1.
2076 static int successfully_proxied_request(REQUEST *request)
2079 int pre_proxy_type = 0;
2080 VALUE_PAIR *realmpair;
2081 VALUE_PAIR *strippedname;
2083 char *realmname = NULL;
2085 REALM *realm = NULL;
2089 * If it was already proxied, do nothing.
2091 * FIXME: This should really be a serious error.
2093 if (request->in_proxy_hash ||
2094 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2098 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM, 0);
2099 if (!realmpair || (realmpair->length == 0)) {
2102 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL, 0);
2105 switch (request->packet->code) {
2106 case PW_AUTHENTICATION_REQUEST:
2107 pool_type = HOME_TYPE_AUTH;
2110 #ifdef WITH_ACCOUNTING
2111 case PW_ACCOUNTING_REQUEST:
2112 pool_type = HOME_TYPE_ACCT;
2117 case PW_COA_REQUEST:
2118 case PW_DISCONNECT_REQUEST:
2119 pool_type = HOME_TYPE_COA;
2127 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2129 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2134 realmname = NULL; /* no realms */
2139 realmname = (char *) realmpair->vp_strvalue;
2141 realm = realm_find2(realmname);
2143 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2148 * Figure out which pool to use.
2150 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2151 pool = realm->auth_pool;
2153 #ifdef WITH_ACCOUNTING
2154 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2155 pool = realm->acct_pool;
2159 } else if ((request->packet->code == PW_COA_REQUEST) ||
2160 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2161 pool = realm->acct_pool;
2165 rad_panic("Internal sanity check failed");
2169 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2175 home = home_server_ldb(realmname, pool, request);
2177 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2181 request->home_pool = pool;
2185 * Once we've decided to proxy a request, we cannot send
2186 * a CoA packet. So we free up any CoA packet here.
2188 ev_request_free(&request->coa);
2191 * Remember that we sent the request to a Realm.
2193 if (realmname) pairadd(&request->packet->vps,
2194 pairmake("Realm", realmname, T_OP_EQ));
2197 * Strip the name, if told to.
2199 * Doing it here catches the case of proxied tunneled
2202 if (realm && (realm->striprealm == TRUE) &&
2203 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME, 0)) != NULL) {
2205 * If there's a Stripped-User-Name attribute in
2206 * the request, then use THAT as the User-Name
2207 * for the proxied request, instead of the
2210 * This is done by making a copy of the
2211 * Stripped-User-Name attribute, turning it into
2212 * a User-Name attribute, deleting the
2213 * Stripped-User-Name and User-Name attributes
2214 * from the vps list, and making the new
2215 * User-Name the head of the vps list.
2217 vp = pairfind(request->proxy->vps, PW_USER_NAME, 0);
2219 vp = radius_paircreate(request, NULL,
2220 PW_USER_NAME, 0, PW_TYPE_STRING);
2221 rad_assert(vp != NULL); /* handled by above function */
2222 /* Insert at the START of the list */
2223 vp->next = request->proxy->vps;
2224 request->proxy->vps = vp;
2226 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2227 sizeof(vp->vp_strvalue));
2228 vp->length = strippedname->length;
2231 * Do NOT delete Stripped-User-Name.
2236 * If there is no PW_CHAP_CHALLENGE attribute but
2237 * there is a PW_CHAP_PASSWORD we need to add it
2238 * since we can't use the request authenticator
2239 * anymore - we changed it.
2241 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2242 pairfind(request->proxy->vps, PW_CHAP_PASSWORD, 0) &&
2243 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE, 0) == NULL) {
2244 vp = radius_paircreate(request, &request->proxy->vps,
2245 PW_CHAP_CHALLENGE, 0, PW_TYPE_OCTETS);
2246 vp->length = AUTH_VECTOR_LEN;
2247 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2251 * The RFC's say we have to do this, but FreeRADIUS
2254 vp = radius_paircreate(request, &request->proxy->vps,
2255 PW_PROXY_STATE, 0, PW_TYPE_OCTETS);
2256 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2257 request->packet->id);
2258 vp->length = strlen(vp->vp_strvalue);
2261 * Should be done BEFORE inserting into proxy hash, as
2262 * pre-proxy may use this information, or change it.
2264 request->proxy->code = request->packet->code;
2267 * Call the pre-proxy routines.
2269 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE, 0);
2271 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2272 pre_proxy_type = vp->vp_integer;
2275 rad_assert(request->home_pool != NULL);
2277 if (request->home_pool->virtual_server) {
2278 const char *old_server = request->server;
2280 request->server = request->home_pool->virtual_server;
2281 RDEBUG2(" server %s {", request->server);
2282 rcode = module_pre_proxy(pre_proxy_type, request);
2284 request->server = old_server;
2286 rcode = module_pre_proxy(pre_proxy_type, request);
2289 case RLM_MODULE_FAIL:
2290 case RLM_MODULE_INVALID:
2291 case RLM_MODULE_NOTFOUND:
2292 case RLM_MODULE_USERLOCK:
2294 /* FIXME: debug print failed stuff */
2297 case RLM_MODULE_REJECT:
2298 case RLM_MODULE_HANDLED:
2302 * Only proxy the packet if the pre-proxy code succeeded.
2304 case RLM_MODULE_NOOP:
2306 case RLM_MODULE_UPDATED:
2311 * If it's a fake request, don't send the proxy
2312 * packet. The outer tunnel session will take
2313 * care of doing that.
2315 if (request->packet->dst_port == 0) {
2316 request->home_server = NULL;
2320 if (request->home_server->server) {
2321 return proxy_to_virtual_server(request);
2324 if (!proxy_request(request)) {
2325 RDEBUG("ERROR: Failed to proxy request");
2333 static void request_post_handler(REQUEST *request)
2335 int child_state = -1;
2336 struct timeval when;
2339 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2341 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2342 RDEBUG2("request was cancelled.");
2343 #ifdef HAVE_PTHREAD_H
2344 request->child_pid = NO_SUCH_CHILD_PID;
2346 child_state = REQUEST_DONE;
2350 if (request->child_state != REQUEST_RUNNING) {
2351 rad_panic("Internal sanity check failed");
2356 * If it's not in the request hash, it's a CoA request.
2359 if (!request->in_request_hash &&
2361 ((request->proxy->code == PW_COA_REQUEST) ||
2362 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2363 request->next_callback = NULL;
2364 child_state = REQUEST_DONE;
2370 * Catch Auth-Type := Reject BEFORE proxying the packet.
2372 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2373 (request->reply->code == 0) &&
2374 ((vp = pairfind(request->config_items, PW_AUTH_TYPE, 0)) != NULL) &&
2375 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2376 request->reply->code = PW_AUTHENTICATION_REJECT;
2380 if (request->root->proxy_requests &&
2381 !request->in_proxy_hash &&
2382 (request->reply->code == 0) &&
2383 (request->packet->dst_port != 0) &&
2384 (request->packet->code != PW_STATUS_SERVER)) {
2385 int rcode = successfully_proxied_request(request);
2387 if (rcode == 1) return; /* request is invalid */
2390 * Failed proxying it (dead home servers, etc.)
2391 * Run it through Post-Proxy-Type = Fail, and
2392 * respond to the request.
2394 * Note that we're in a child thread here, so we
2395 * do NOT re-schedule the request. Instead, we
2396 * do what we would have done, which is run the
2397 * pre-handler, a NULL request handler, and then
2400 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2401 request_pre_handler(request);
2405 * Else we weren't supposed to proxy it,
2406 * OR we proxied it internally to a virutal server.
2411 else if (request->proxy && request->coa) {
2412 RDEBUG("WARNING: Cannot proxy and originate CoA packets at the same time. Cancelling CoA request");
2413 ev_request_free(&request->coa);
2419 * Fake requests don't get encoded or signed. The caller
2420 * also requires the reply VP's, so we don't free them
2423 if (request->packet->dst_port == 0) {
2424 /* FIXME: RDEBUG going to the next request */
2425 #ifdef HAVE_PTHREAD_H
2426 request->child_pid = NO_SUCH_CHILD_PID;
2428 request->child_state = REQUEST_DONE;
2434 * Copy Proxy-State from the request to the reply.
2436 vp = paircopy2(request->packet->vps, PW_PROXY_STATE, 0);
2437 if (vp) pairadd(&request->reply->vps, vp);
2441 * Access-Requests get delayed or cached.
2443 switch (request->packet->code) {
2444 case PW_AUTHENTICATION_REQUEST:
2445 gettimeofday(&request->next_when, NULL);
2447 if (request->reply->code == 0) {
2449 * Check if the lack of response is intentional.
2451 vp = pairfind(request->config_items,
2452 PW_RESPONSE_PACKET_TYPE, 0);
2454 RDEBUG2("There was no response configured: rejecting request");
2455 request->reply->code = PW_AUTHENTICATION_REJECT;
2457 } else if (vp->vp_integer == 256) {
2458 RDEBUG2("Not responding to request");
2461 * Force cleanup after a long
2462 * time, so that we don't
2463 * re-process the packet.
2465 request->next_when.tv_sec += request->root->max_request_time;
2466 request->next_callback = cleanup_delay;
2467 child_state = REQUEST_CLEANUP_DELAY;
2470 request->reply->code = vp->vp_integer;
2476 * Run rejected packets through
2478 * Post-Auth-Type = Reject
2480 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2481 pairdelete(&request->config_items, PW_POST_AUTH_TYPE, 0);
2482 vp = radius_pairmake(request, &request->config_items,
2483 "Post-Auth-Type", "Reject",
2485 if (vp) rad_postauth(request);
2488 * If configured, delay Access-Reject packets.
2490 * If request->root->reject_delay = 0, we discover
2491 * that we have to send the packet now.
2493 when = request->received;
2494 when.tv_sec += request->root->reject_delay;
2496 if (timercmp(&when, &request->next_when, >)) {
2497 RDEBUG2("Delaying reject for %d seconds",
2498 request->root->reject_delay);
2499 request->next_when = when;
2500 request->next_callback = reject_delay;
2501 #ifdef HAVE_PTHREAD_H
2502 request->child_pid = NO_SUCH_CHILD_PID;
2504 request->child_state = REQUEST_REJECT_DELAY;
2510 case PW_COA_REQUEST:
2511 case PW_DISCONNECT_REQUEST:
2513 request->next_when.tv_sec += request->root->cleanup_delay;
2514 request->next_callback = cleanup_delay;
2515 child_state = REQUEST_CLEANUP_DELAY;
2518 case PW_ACCOUNTING_REQUEST:
2519 request->next_callback = NULL; /* just to be safe */
2520 child_state = REQUEST_DONE;
2524 * FIXME: Status-Server should probably not be
2527 case PW_STATUS_SERVER:
2528 request->next_callback = NULL;
2529 child_state = REQUEST_DONE;
2536 request->next_callback = NULL;
2537 child_state = REQUEST_DONE;
2542 * Suppress "no reply" packets here, unless we're reading
2543 * from the "detail" file. In that case, we've got to
2544 * tell the detail file handler that the request is dead,
2545 * and it should re-send it.
2546 * If configured, encode, sign, and send.
2548 if ((request->reply->code != 0) ||
2549 (request->listener->type == RAD_LISTEN_DETAIL)) {
2550 DEBUG_PACKET(request, request->reply, 1);
2551 request->listener->send(request->listener, request);
2556 * Now that we've completely processed the request,
2557 * see if we need to originate a CoA request. But ONLY
2558 * if it wasn't proxied.
2560 if (!request->proxy &&
2562 (pairfind(request->config_items, PW_SEND_COA_REQUEST, 0) != NULL))) {
2563 if (!originated_coa_request(request)) {
2564 RDEBUG2("Do CoA Fail handler here");
2566 /* request->coa is stil set, so we can update events */
2572 * Clean up. These are no longer needed.
2574 pairfree(&request->config_items);
2576 pairfree(&request->packet->vps);
2577 request->username = NULL;
2578 request->password = NULL;
2580 pairfree(&request->reply->vps);
2583 if (request->proxy) {
2584 pairfree(&request->proxy->vps);
2586 if (request->proxy_reply) {
2587 pairfree(&request->proxy_reply->vps);
2592 * We're not tracking responses from the home
2593 * server, we can therefore free this memory in
2596 if (!request->in_proxy_hash) {
2597 rad_free(&request->proxy);
2598 rad_free(&request->proxy_reply);
2599 request->home_server = NULL;
2605 RDEBUG2("Finished request.");
2606 rad_assert(child_state >= 0);
2607 request->child_state = child_state;
2610 * Single threaded mode: update timers now.
2612 if (!have_children) wait_a_bit(request);
2616 static void rad_retransmit_packet(REQUEST *request)
2621 if (request->home_server->proto == IPPROTO_TCP) {
2622 DEBUG2("Suppressing duplicate proxied request to home server %s port %d proto TCP - ID: %d",
2623 inet_ntop(request->proxy->dst_ipaddr.af,
2624 &request->proxy->dst_ipaddr.ipaddr,
2625 buffer, sizeof(buffer)),
2626 request->proxy->dst_port,
2627 request->proxy->id);
2628 return; /* don't do anything else */
2632 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2633 inet_ntop(request->proxy->dst_ipaddr.af,
2634 &request->proxy->dst_ipaddr.ipaddr,
2635 buffer, sizeof(buffer)),
2636 request->proxy->dst_port,
2637 request->proxy->id);
2638 request->num_proxied_requests++;
2640 DEBUG_PACKET(request, request->proxy, 1);
2641 request->proxy_listener->send(request->proxy_listener,
2646 static int rad_retransmit(REQUEST *request)
2649 * If we've just discovered that the home server
2650 * is dead, OR the socket has been closed, look for
2651 * another connection to a home server.
2653 if ((request->home_server->state == HOME_STATE_IS_DEAD) ||
2654 (request->proxy_listener->status != RAD_LISTEN_STATUS_KNOWN)) {
2657 remove_from_proxy_hash(request);
2659 home = home_server_ldb(NULL, request->home_pool, request);
2661 RDEBUG2("Failed to find live home server for request");
2664 * Do post-request processing,
2665 * and any insertion of necessary
2668 post_proxy_fail_handler(request);
2672 request->proxy->code = request->packet->code;
2675 * Free the old packet, to force re-encoding
2677 free(request->proxy->data);
2678 request->proxy->data = NULL;
2679 request->proxy->data_len = 0;
2682 * This request failed over to a virtual
2683 * server. Push it back onto the queue
2686 if (request->home_server->server) {
2687 proxy_fallback_handler(request);
2692 * Try to proxy the request.
2694 if (!proxy_request(request)) {
2695 RDEBUG("ERROR: Failed to re-proxy request");
2696 goto no_home_servers;
2699 } /* else the home server is still alive */
2701 rad_retransmit_packet(request);
2707 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2710 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2711 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2713 switch (request->child_state) {
2714 case REQUEST_QUEUED:
2715 case REQUEST_RUNNING:
2719 radlog(L_ERR, "Discarding duplicate request from "
2720 "client %s port %d - ID: %d due to unfinished request %u",
2722 request->packet->src_port,request->packet->id,
2727 case REQUEST_PROXIED:
2729 * We're not supposed to have duplicate
2730 * accounting packets. The other states handle
2731 * duplicates fine (discard, or send duplicate
2732 * reply). But we do NOT want to retransmit an
2733 * accounting request here, because that would
2734 * involve updating the Acct-Delay-Time, and
2735 * therefore changing the packet Id, etc.
2737 * Instead, we just discard the packet. We may
2738 * eventually respond, or the client will send a
2739 * new accounting packet.
2741 * The same comments go for Status-Server, and
2742 * other packet types.
2744 * FIXME: coa: when we proxy CoA && Disconnect
2745 * packets, this logic has to be fixed.
2747 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2751 check_for_zombie_home_server(request);
2754 * Home server is still alive, and the proxy
2755 * socket is OK. Just re-send the packet.
2757 if ((request->home_server->state != HOME_STATE_IS_DEAD) &&
2758 (request->proxy_listener->status == RAD_LISTEN_STATUS_KNOWN)) {
2759 rad_retransmit_packet(request);
2764 * Otherwise, we need to fail over to another
2765 * home server, and possibly run "post-proxy-type
2766 * fail". Add an event waiting for the child to
2769 INSERT_EVENT(wait_a_bit, request);
2771 request->priority = RAD_LISTEN_PROXY;
2772 thread_pool_addrequest(request, rad_retransmit);
2776 case REQUEST_REJECT_DELAY:
2777 RDEBUG2("Waiting to send Access-Reject "
2778 "to client %s port %d - ID: %d",
2780 request->packet->src_port, request->packet->id);
2783 case REQUEST_CLEANUP_DELAY:
2785 if (request->reply->code == 0) {
2786 RDEBUG2("Ignoring retransmit from client %s port %d "
2787 "- ID: %d, no reply was configured",
2789 request->packet->src_port, request->packet->id);
2794 * FIXME: This sends duplicate replies to
2795 * accounting requests, even if Acct-Delay-Time
2796 * or Event-Timestamp is in the packet. In those
2797 * cases, the Id should be changed, and the packet
2800 RDEBUG2("Sending duplicate reply "
2801 "to client %s port %d - ID: %d",
2803 request->packet->src_port, request->packet->id);
2804 DEBUG_PACKET(request, request->reply, 1);
2805 request->listener->send(request->listener, request);
2811 static void received_conflicting_request(REQUEST *request,
2812 const RADCLIENT *client)
2814 radlog(L_ERR, "Received conflicting packet from "
2815 "client %s port %d - ID: %d due to unfinished request %u. Giving up on old request.",
2817 request->packet->src_port, request->packet->id,
2821 * Nuke it from the request hash, so we can receive new
2824 remove_from_request_hash(request);
2826 switch (request->child_state) {
2828 * Tell it to stop, and wait for it to do so.
2831 request->master_state = REQUEST_STOP_PROCESSING;
2832 request->delay += request->delay >> 1;
2834 tv_add(&request->when, request->delay);
2836 INSERT_EVENT(wait_for_child_to_die, request);
2840 * Catch race conditions. It may have switched
2841 * from running to done while this code is being
2844 case REQUEST_REJECT_DELAY:
2845 case REQUEST_CLEANUP_DELAY:
2852 static int can_handle_new_request(RADIUS_PACKET *packet,
2854 struct main_config_t *root)
2857 * Count the total number of requests, to see if
2858 * there are too many. If so, return with an
2861 if (root->max_requests) {
2862 int request_count = fr_packet_list_num_elements(pl);
2865 * This is a new request. Let's see if
2866 * it makes us go over our configured
2869 if (request_count > root->max_requests) {
2870 radlog(L_ERR, "Dropping request (%d is too many): "
2871 "from client %s port %d - ID: %d", request_count,
2873 packet->src_port, packet->id);
2874 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2875 "\tThe value for 'max_requests' is probably set too low.\n");
2877 } /* else there were a small number of requests */
2878 } /* else there was no configured limit for requests */
2881 * FIXME: Add per-client checks. If one client is sending
2882 * too many packets, start discarding them.
2884 * We increment the counters here, and decrement them
2885 * when the response is sent... somewhere in this file.
2889 * FUTURE: Add checks for system load. If the system is
2890 * busy, start dropping requests...
2892 * We can probably keep some statistics ourselves... if
2893 * there are more requests coming in than we can handle,
2894 * start dropping some.
2901 int received_request(rad_listen_t *listener,
2902 RADIUS_PACKET *packet, REQUEST **prequest,
2905 RADIUS_PACKET **packet_p;
2906 REQUEST *request = NULL;
2907 struct main_config_t *root = &mainconfig;
2909 packet_p = fr_packet_list_find(pl, packet);
2911 request = fr_packet2myptr(REQUEST, packet, packet_p);
2912 rad_assert(request->in_request_hash);
2914 if ((request->packet->data_len == packet->data_len) &&
2915 (memcmp(request->packet->vector, packet->vector,
2916 sizeof(packet->vector)) == 0)) {
2917 received_retransmit(request, client);
2922 * The new request is different from the old one,
2923 * but maybe the old is finished. If so, delete
2926 switch (request->child_state) {
2927 struct timeval when;
2931 * Special hacks for race conditions.
2932 * The reply is encoded, and therefore
2933 * likely sent. We received a *new*
2934 * packet from the client, likely before
2935 * the next line or two of code which
2936 * updated the child state. In this
2937 * case, just accept the new request.
2939 if ((request->reply->code != 0) &&
2940 request->reply->data) {
2941 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %u.",
2943 packet->src_port, packet->id,
2945 remove_from_request_hash(request);
2950 gettimeofday(&when, NULL);
2954 * If the cached request was received
2955 * within the last second, then we
2956 * discard the NEW request instead of the
2957 * old one. This will happen ONLY when
2958 * the client is severely broken, and is
2959 * sending conflicting packets very
2962 if (timercmp(&when, &request->received, <)) {
2963 radlog(L_ERR, "Discarding conflicting packet from "
2964 "client %s port %d - ID: %d due to recent request %u.",
2966 packet->src_port, packet->id,
2971 received_conflicting_request(request, client);
2975 case REQUEST_REJECT_DELAY:
2976 case REQUEST_CLEANUP_DELAY:
2977 request->child_state = REQUEST_DONE;
2979 cleanup_delay(request);
2986 * We may want to quench the new request.
2988 if ((listener->type != RAD_LISTEN_DETAIL) &&
2989 !can_handle_new_request(packet, client, root)) {
2994 * Create and initialize the new request.
2996 request = request_alloc(); /* never fails */
2998 if ((request->reply = rad_alloc(0)) == NULL) {
2999 radlog(L_ERR, "No memory");
3003 request->listener = listener;
3004 request->client = client;
3005 request->packet = packet;
3006 request->packet->timestamp = request->timestamp;
3007 request->number = request_num_counter++;
3008 request->priority = listener->type;
3009 #ifdef HAVE_PTHREAD_H
3010 request->child_pid = NO_SUCH_CHILD_PID;
3014 * Status-Server packets go to the head of the queue.
3016 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
3019 * Set virtual server identity
3021 if (client->server) {
3022 request->server = client->server;
3023 } else if (listener->server) {
3024 request->server = listener->server;
3026 request->server = NULL;
3030 * Remember the request in the list.
3032 if (!fr_packet_list_insert(pl, &request->packet)) {
3033 radlog(L_ERR, "Failed to insert request %u in the list of live requests: discarding", request->number);
3034 ev_request_free(&request);
3038 request->in_request_hash = TRUE;
3039 request->root = root;
3042 request->listener->count++;
3046 * The request passes many of our sanity checks.
3047 * From here on in, if anything goes wrong, we
3048 * send a reject message, instead of dropping the
3053 * Build the reply template from the request.
3056 request->reply->sockfd = request->packet->sockfd;
3057 request->reply->dst_ipaddr = request->packet->src_ipaddr;
3058 request->reply->src_ipaddr = request->packet->dst_ipaddr;
3059 request->reply->dst_port = request->packet->src_port;
3060 request->reply->src_port = request->packet->dst_port;
3061 request->reply->id = request->packet->id;
3062 request->reply->code = 0; /* UNKNOWN code */
3063 memcpy(request->reply->vector, request->packet->vector,
3064 sizeof(request->reply->vector));
3065 request->reply->vps = NULL;
3066 request->reply->data = NULL;
3067 request->reply->data_len = 0;
3069 request->master_state = REQUEST_ACTIVE;
3070 request->child_state = REQUEST_QUEUED;
3071 request->next_callback = NULL;
3073 gettimeofday(&request->received, NULL);
3074 request->timestamp = request->received.tv_sec;
3075 request->when = request->received;
3077 request->delay = USEC;
3079 tv_add(&request->when, request->delay);
3081 INSERT_EVENT(wait_a_bit, request);
3083 *prequest = request;
3089 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
3095 * Lookup *without* removal. In versions prior to 2.2.0,
3096 * this did lookup *and* removal. That method allowed
3097 * attackers to spoof replies that caused entries to be
3098 * removed from the proxy hash prior to validation.
3100 request = lookup_in_proxy_hash(packet);
3103 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
3104 inet_ntop(packet->src_ipaddr.af,
3105 &packet->src_ipaddr.ipaddr,
3106 buffer, sizeof(buffer)),
3107 packet->src_port, packet->id);
3112 * There's a reply: discard it if it's a conflicting one.
3114 if (request->proxy_reply) {
3116 * ? The home server gave us a new proxy
3117 * reply which doesn't match the old
3120 if (memcmp(request->proxy_reply->vector,
3122 sizeof(request->proxy_reply->vector)) != 0) {
3123 RDEBUG2("Ignoring conflicting proxy reply");
3126 /* assert that there's an event queued for request? */
3128 } /* else it had previously passed verification */
3131 * Verify the packet before doing ANYTHING with
3132 * it. This means we're doing more MD5 checks in
3133 * the server core. However, we can fix that by
3134 * moving to multiple threads listening on
3137 * We do this AFTER looking the request up in the
3138 * hash, and AFTER checking if we saw a previous
3139 * request. This helps minimize the DoS effect
3140 * of people attacking us with spoofed packets.
3142 * FIXME: move the "read from proxy socket" code
3143 * into one (or more) threads. Have it read from
3144 * the socket, do the validation, and write a
3145 * pointer to the packet into a pipe? Or queue it
3146 * to the main server?
3148 } else if (rad_verify(packet, request->proxy,
3149 request->home_server->secret) != 0) {
3150 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3155 * Check (again) if it's a duplicate reply. We do this
3156 * after deleting the packet from the proxy hash.
3158 if (request->proxy_reply) {
3159 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d",
3160 inet_ntop(packet->src_ipaddr.af,
3161 &packet->src_ipaddr.ipaddr,
3162 buffer, sizeof(buffer)),
3163 packet->src_port, packet->id);
3166 gettimeofday(&now, NULL);
3169 * "ping" packets have a different algorithm for marking
3170 * a home server alive. They also skip all of the CoA,
3173 if (!request->packet) {
3174 request->proxy_reply = packet;
3176 rad_assert(request->home_server != NULL);
3177 if (request->home_server->proto != IPPROTO_TCP)
3179 received_response_to_ping(request);
3180 request->proxy_reply = NULL; /* caller will free it */
3181 ev_request_free(&request);
3186 * Maybe move this earlier in the decision process?
3187 * Having it here means that late or duplicate proxy
3188 * replies no longer get the home server marked as
3189 * "alive". This might be good for stability, though.
3191 * FIXME: Do we really want to do this whenever we
3192 * receive a packet? Setting this here means that we
3193 * mark it alive on *any* packet, even if it's lost all
3194 * of the *other* packets in the last 10s.
3196 request->home_server->state = HOME_STATE_ALIVE;
3200 * When originating CoA, the "proxy" reply is the reply
3201 * to the CoA request that we originated. At this point,
3202 * the original request is finished, and it has a reply.
3204 * However, if we haven't separated the two requests, do
3205 * so now. This is done so that cleaning up the original
3206 * request won't cause the CoA request to be free'd. See
3207 * util.c, request_free()
3209 if (request->parent && (request->parent->coa == request)) {
3210 request->parent->coa = NULL;
3211 request->parent = NULL;
3214 * The proxied packet was different from the
3215 * original packet, AND the proxied packet was
3218 } else if ((request->packet->code != request->proxy->code) &&
3219 ((request->proxy->code == PW_COA_REQUEST) ||
3220 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
3222 * It's already divorced: do nothing.
3227 * Skip the next set of checks, as the original
3228 * reply is cached. We want to be able to still
3229 * process the CoA reply, AND to reference the
3230 * original request/reply.
3232 * This is getting to be really quite a bit of a
3238 * If there's a reply to the NAS, ignore everything
3239 * related to proxy responses
3241 if (request->reply && request->reply->code != 0) {
3242 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3248 * The average includes our time to receive packets and
3249 * look them up in the hashes, which should be the same
3252 * We update the response time only for the FIRST packet
3255 if (request->home_server->ema.window > 0) {
3256 radius_stats_ema(&request->home_server->ema,
3257 &now, &request->proxy_when);
3261 switch (request->child_state) {
3262 case REQUEST_QUEUED:
3263 case REQUEST_RUNNING:
3264 radlog(L_ERR, "Internal sanity check failed for child state");
3267 case REQUEST_REJECT_DELAY:
3268 case REQUEST_CLEANUP_DELAY:
3270 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'",
3271 inet_ntop(packet->src_ipaddr.af,
3272 &packet->src_ipaddr.ipaddr,
3273 buffer, sizeof(buffer)),
3274 packet->src_port, packet->id,
3276 /* assert that there's an event queued for request? */
3279 case REQUEST_PROXIED:
3283 request->proxy_reply = packet;
3287 * Perform RTT calculations, as per RFC 2988 (for TCP).
3288 * Note that we only do so on the first response.
3290 if ((request->num_proxied_responses == 1)
3292 home_server *home = request->home_server;
3294 rtt = now.tv_sec - request->proxy_when.tv_sec;
3297 rtt -= request->proxy_when.tv_usec;
3299 if (!home->has_rtt) {
3300 home->has_rtt = TRUE;
3303 home->rttvar = rtt / 2;
3306 home->rttvar -= home->rttvar >> 2;
3307 home->rttvar += (home->srtt - rtt);
3308 home->srtt -= home->srtt >> 3;
3309 home->srtt += rtt >> 3;
3312 home->rto = home->srtt;
3313 if (home->rttvar > (USEC / 4)) {
3314 home->rto += home->rttvar * 4;
3321 request->child_state = REQUEST_QUEUED;
3322 request->when = now;
3323 request->delay = USEC;
3324 request->priority = RAD_LISTEN_PROXY;
3325 tv_add(&request->when, request->delay);
3328 * Wait a bit will take care of max_request_time
3330 INSERT_EVENT(wait_a_bit, request);
3335 #endif /* WITH_PROXY */
3338 static void tcp_socket_lifetime(void *ctx)
3340 rad_listen_t *listener = ctx;
3343 listener->print(listener, buffer, sizeof(buffer));
3345 DEBUG("Reached maximum lifetime on socket %s", buffer);
3347 listener->status = RAD_LISTEN_STATUS_CLOSED;
3348 event_new_fd(listener);
3351 static void tcp_socket_idle_timeout(void *ctx)
3353 rad_listen_t *listener = ctx;
3354 listen_socket_t *sock = listener->data;
3357 fr_event_now(el, &now); /* should always succeed... */
3359 rad_assert(sock->home != NULL);
3362 * We implement idle timeout by polling, because it's
3363 * cheaper than resetting the idle timeout every time
3364 * we send / receive a packet.
3366 if ((sock->last_packet + sock->home->idle_timeout) > now.tv_sec) {
3367 struct timeval when;
3368 void *fun = tcp_socket_idle_timeout;
3370 when.tv_sec = sock->last_packet;
3371 when.tv_sec += sock->home->idle_timeout;
3374 if (sock->home->lifetime &&
3375 (sock->opened + sock->home->lifetime < when.tv_sec)) {
3376 when.tv_sec = sock->opened + sock->home->lifetime;
3377 fun = tcp_socket_lifetime;
3380 if (!fr_event_insert(el, fun, listener, &when, &sock->ev)) {
3381 rad_panic("Failed to insert event");
3387 listener->print(listener, buffer, sizeof(buffer));
3389 DEBUG("Reached idle timeout on socket %s", buffer);
3391 listener->status = RAD_LISTEN_STATUS_CLOSED;
3392 event_new_fd(listener);
3396 int event_new_fd(rad_listen_t *this)
3400 if (this->status == RAD_LISTEN_STATUS_KNOWN) return 1;
3402 this->print(this, buffer, sizeof(buffer));
3404 if (this->status == RAD_LISTEN_STATUS_INIT) {
3406 DEBUG("Listening on %s", buffer);
3408 radlog(L_INFO, " ... adding new socket %s", buffer);
3413 * Add it to the list of sockets we can use.
3414 * Server sockets (i.e. auth/acct) are never
3415 * added to the packet list.
3417 if (this->type == RAD_LISTEN_PROXY) {
3418 listen_socket_t *sock = this->data;
3420 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3421 if (!fr_packet_list_socket_add(proxy_list, this->fd,
3423 &sock->other_ipaddr, sock->other_port,
3426 proxy_no_new_sockets = TRUE;
3427 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3430 * This is bad. However, the
3431 * packet list now supports 256
3432 * open sockets, which should
3433 * minimize this problem.
3435 radlog(L_ERR, "Failed adding proxy socket: %s",
3441 sock->home->num_connections++;
3444 * If necessary, add it to the list of
3445 * new proxy listeners.
3447 if (sock->home->lifetime || sock->home->idle_timeout) {
3448 this->next = proxy_listener_list;
3449 proxy_listener_list = this;
3452 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3455 * Tell the main thread that we've added
3456 * a proxy listener, but only if we need
3457 * to update the event list. Do this
3458 * with the mutex unlocked, to reduce
3462 if (sock->home->lifetime || sock->home->idle_timeout) {
3463 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
3471 * Detail files are always known, and aren't
3472 * put into the socket event loop.
3474 if (this->type == RAD_LISTEN_DETAIL) {
3475 this->status = RAD_LISTEN_STATUS_KNOWN;
3478 * Set up the first poll interval.
3480 event_poll_detail(this);
3485 FD_MUTEX_LOCK(&fd_mutex);
3486 if (!fr_event_fd_insert(el, 0, this->fd,
3487 event_socket_handler, this)) {
3488 radlog(L_ERR, "Failed adding event handler for proxy socket!");
3491 FD_MUTEX_UNLOCK(&fd_mutex);
3493 this->status = RAD_LISTEN_STATUS_KNOWN;
3498 * Something went wrong with the socket: make it harmless.
3500 if (this->status == RAD_LISTEN_STATUS_REMOVE_FD) {
3504 * Remove it from the list of live FD's.
3506 FD_MUTEX_LOCK(&fd_mutex);
3507 fr_event_fd_delete(el, 0, this->fd);
3508 FD_MUTEX_UNLOCK(&fd_mutex);
3512 * We track requests using this socket only for
3513 * TCP. For UDP, we don't currently close
3517 if (this->type != RAD_LISTEN_PROXY)
3520 if (this->count != 0) {
3521 fr_packet_list_walk(pl, this,
3522 remove_all_requests);
3525 if (this->count == 0) {
3526 this->status = RAD_LISTEN_STATUS_FINISH;
3532 int count = this->count;
3537 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3538 if (!fr_packet_list_socket_freeze(proxy_list,
3540 radlog(L_ERR, "Fatal error freezing socket: %s",
3546 * Doing this with the proxy mutex held
3547 * is a Bad Thing. We should move to
3548 * finer-grained mutexes.
3550 count = this->count;
3552 fr_packet_list_walk(proxy_list, this,
3553 remove_all_proxied_requests);
3555 count = this->count; /* protected by mutex */
3556 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3559 this->status = RAD_LISTEN_STATUS_FINISH;
3563 #endif /* WITH_PROXY */
3564 #endif /* WITH_TCP */
3567 * Re-open the socket, pointing it to /dev/null.
3568 * This means that all writes proceed without
3569 * blocking, and all reads return "no data".
3571 * This leaves the socket active, so any child
3572 * threads won't go insane. But it means that
3573 * they cannot send or receive any packets.
3575 * This is EXTRA work in the normal case, when
3576 * sockets are closed without error. But it lets
3577 * us have one simple processing method for all
3580 devnull = open("/dev/null", O_RDWR);
3582 radlog(L_ERR, "FATAL failure opening /dev/null: %s",
3586 if (dup2(devnull, this->fd) < 0) {
3587 radlog(L_ERR, "FATAL failure closing socket: %s",
3593 this->status = RAD_LISTEN_STATUS_CLOSED;
3596 * Fall through to the next section.
3602 * Called ONLY from the main thread. On the following
3608 * (and falling through from "forcibly close FD" above)
3609 * client closed connection on us
3610 * client sent us a bad packet.
3612 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3613 int count = this->count;
3614 rad_assert(this->type != RAD_LISTEN_DETAIL);
3618 * Remove it from the list of active sockets, so
3619 * that it isn't used when proxying new packets.
3621 if (this->type == RAD_LISTEN_PROXY) {
3622 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3623 if (!fr_packet_list_socket_freeze(proxy_list,
3625 radlog(L_ERR, "Fatal error freezing socket: %s",
3629 count = this->count; /* protected by mutex */
3630 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3635 * Requests are still using the socket. Wait for
3639 struct timeval when;
3640 listen_socket_t *sock = this->data;
3643 * Try again to clean up the socket in 30
3646 gettimeofday(&when, NULL);
3649 if (!fr_event_insert(el,
3650 (fr_event_callback_t) event_new_fd,
3651 this, &when, &sock->ev)) {
3652 rad_panic("Failed to insert event");
3659 * No one is using this socket: we can delete it
3662 this->status = RAD_LISTEN_STATUS_FINISH;
3666 if (this->status == RAD_LISTEN_STATUS_FINISH) {
3667 listen_socket_t *sock = this->data;
3669 rad_assert(this->count == 0);
3670 radlog(L_INFO, " ... closing socket %s", buffer);
3673 * Remove it from the list of live FD's. Note
3674 * that it MAY also have been removed above. We
3675 * do it again here, to catch the case of sockets
3676 * closing on idle timeout, or max
3677 * lifetime... AFTER all requests have finished
3680 FD_MUTEX_LOCK(&fd_mutex);
3681 fr_event_fd_delete(el, 0, this->fd);
3682 FD_MUTEX_UNLOCK(&fd_mutex);
3686 * Remove it from the list of sockets to be used
3689 if (this->type == RAD_LISTEN_PROXY) {
3690 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3691 if (!fr_packet_list_socket_remove(proxy_list,
3693 radlog(L_ERR, "Fatal error removing socket: %s",
3697 if (sock->home) sock->home->num_connections--;
3698 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3703 * Remove any pending cleanups.
3705 if (sock->ev) fr_event_delete(el, &sock->ev);
3708 * And finally, close the socket.
3712 #endif /* WITH_TCP */
3717 static void handle_signal_self(int flag)
3719 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3720 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3721 radlog(L_INFO, "Received TERM signal");
3722 fr_event_loop_exit(el, 1);
3724 fr_event_loop_exit(el, 2);
3728 } /* else exit/term flags weren't set */
3731 * Tell the even loop to stop processing.
3733 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3735 static time_t last_hup = 0;
3738 if ((int) (when - last_hup) < 5) {
3739 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3743 radlog(L_INFO, "Received HUP signal.");
3747 fr_event_loop_exit(el, 0x80);
3751 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3755 * FIXME: O(N) loops suck.
3757 for (this = mainconfig.listen;
3759 this = this->next) {
3760 if (this->type != RAD_LISTEN_DETAIL) continue;
3763 * This one didn't send the signal, skip
3766 if (!this->decode(this, NULL)) continue;
3769 * Go service the interrupt.
3771 event_poll_detail(this);
3779 * Add event handlers for idle timeouts && maximum lifetime.
3781 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3782 struct timeval when;
3785 fr_event_now(el, &now);
3787 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3789 while (proxy_listener_list) {
3790 rad_listen_t *this = proxy_listener_list;
3791 listen_socket_t *sock = this->data;
3793 proxy_listener_list = this->next;
3796 if (!sock->home) continue; /* skip UDP sockets */
3800 if (!sock->home->idle_timeout) {
3801 rad_assert(sock->home->lifetime != 0);
3803 when.tv_sec += sock->home->lifetime;
3804 fun = tcp_socket_lifetime;
3806 rad_assert(sock->home->idle_timeout != 0);
3808 when.tv_sec += sock->home->idle_timeout;
3809 fun = tcp_socket_idle_timeout;
3812 if (!fr_event_insert(el, fun, this, &when,
3814 rad_panic("Failed to insert event");
3818 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3820 #endif /* WITH_PROXY */
3821 #endif /* WITH_TCP */
3824 #ifndef WITH_SELF_PIPE
3825 void radius_signal_self(int flag)
3827 handle_signal_self(flag);
3831 * Inform ourselves that we received a signal.
3833 void radius_signal_self(int flag)
3839 * The read MUST be non-blocking for this to work.
3841 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3845 for (i = 0; i < rcode; i++) {
3846 buffer[0] |= buffer[i];
3854 write(self_pipe[1], buffer, 1);
3858 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3859 UNUSED int fd, UNUSED void *ctx)
3864 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3865 if (rcode <= 0) return;
3868 * Merge pending signals.
3870 for (i = 0; i < rcode; i++) {
3871 buffer[0] |= buffer[i];
3874 handle_signal_self(buffer[0]);
3879 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3882 rad_listen_t *listener = ctx;
3883 RAD_REQUEST_FUNP fun;
3886 rad_assert(xel == el);
3890 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3892 if (!listener->recv(listener, &fun, &request)) return;
3894 rad_assert(fun != NULL);
3895 rad_assert(request != NULL);
3897 thread_pool_addrequest(request, fun);
3902 * This function is called periodically to see if this detail
3903 * file is available for reading.
3905 static void event_poll_detail(void *ctx)
3908 rad_listen_t *this = ctx;
3909 struct timeval when;
3910 listen_detail_t *detail = this->data;
3912 rad_assert(this->type == RAD_LISTEN_DETAIL);
3914 event_socket_handler(el, this->fd, this);
3916 fr_event_now(el, &now);
3920 * Backdoor API to get the delay until the next poll
3923 delay = this->encode(this, NULL);
3924 tv_add(&when, delay);
3926 if (!fr_event_insert(el, event_poll_detail, this,
3927 &when, &detail->ev)) {
3928 radlog(L_ERR, "Failed creating handler");
3934 static void event_status(struct timeval *wake)
3936 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3940 if (debug_flag == 0) {
3942 radlog(L_INFO, "Ready to process requests.");
3943 just_started = FALSE;
3949 radlog(L_INFO, "Ready to process requests.");
3951 } else if ((wake->tv_sec != 0) ||
3952 (wake->tv_usec >= 100000)) {
3953 DEBUG("Waking up in %d.%01u seconds.",
3954 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3959 * FIXME: Put this somewhere else, where it isn't called
3960 * all of the time...
3963 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3965 * If there are no child threads, then there may
3966 * be child processes. In that case, wait for
3967 * their exit status, and throw that exit status
3968 * away. This helps get rid of zxombie children.
3970 while (waitpid(-1, &argval, WNOHANG) > 0) {
3978 * Externally-visibly functions.
3980 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3982 rad_listen_t *head = NULL;
3986 time(&fr_start_time);
3988 el = fr_event_list_create(event_status);
3991 pl = fr_packet_list_create(0);
3992 if (!pl) return 0; /* leak el */
3994 request_num_counter = 0;
3997 if (mainconfig.proxy_requests) {
3999 * Create the tree for managing proxied requests and
4002 proxy_list = fr_packet_list_create(1);
4003 if (!proxy_list) return 0;
4005 #ifdef HAVE_PTHREAD_H
4006 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
4007 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
4015 #ifdef HAVE_PTHREAD_H
4017 NO_SUCH_CHILD_PID = (pthread_t ) (0);
4019 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
4022 * Initialize the threads ONLY if we're spawning, AND
4023 * we're running normally.
4025 if (spawn_flag && !check_config &&
4026 (thread_pool_init(cs, &spawn_flag) < 0)) {
4032 * Move all of the thread calls to this file?
4034 * It may be best for the mutexes to be in this file...
4036 have_children = spawn_flag;
4039 DEBUG("%s: #### Skipping IP addresses and Ports ####",
4044 #ifdef WITH_SELF_PIPE
4046 * Child threads need a pipe to signal us, as do the
4049 if (pipe(self_pipe) < 0) {
4050 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
4054 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4055 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4059 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
4060 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
4065 if (!fr_event_fd_insert(el, 0, self_pipe[0],
4066 event_signal_handler, el)) {
4067 radlog(L_ERR, "Failed creating handler for signals");
4070 #endif /* WITH_SELF_PIPE */
4072 DEBUG("%s: #### Opening IP addresses and Ports ####",
4076 * The server temporarily switches to an unprivileged
4077 * user very early in the bootstrapping process.
4078 * However, some sockets MAY require privileged access
4079 * (bind to device, or to port < 1024, or to raw
4080 * sockets). Those sockets need to call suid up/down
4081 * themselves around the functions that need a privileged
4084 if (listen_init(cs, &head) < 0) {
4088 mainconfig.listen = head;
4091 * At this point, no one has any business *ever* going
4094 fr_suid_down_permanent();
4100 static int request_hash_cb(UNUSED void *ctx, void *data)
4102 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
4105 rad_assert(request->in_proxy_hash == FALSE);
4108 ev_request_free(&request);
4115 static int proxy_hash_cb(UNUSED void *ctx, void *data)
4117 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
4119 ev_request_free(&request);
4125 void radius_event_free(void)
4128 * FIXME: Stop all threads, or at least check that
4129 * they're all waiting on the semaphore, and the queues
4135 * There are requests in the proxy hash that aren't
4136 * referenced from anywhere else. Remove them first.
4139 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
4140 fr_packet_list_free(proxy_list);
4145 fr_packet_list_walk(pl, NULL, request_hash_cb);
4147 fr_packet_list_free(pl);
4150 fr_event_list_free(el);
4153 int radius_event_process(void)
4157 return fr_event_loop(el);
4160 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
4162 request->options = RAD_REQUEST_OPTION_DEBUG2;
4164 if (request_pre_handler(request)) {
4165 rad_assert(fun != NULL);
4166 rad_assert(request != NULL);
4168 if (request->server) RDEBUG("server %s {",
4169 request->server != NULL ?
4170 request->server : "");
4173 if (request->server) RDEBUG("} # server %s",
4174 request->server != NULL ?
4175 request->server : "");
4177 request_post_handler(request);
4180 DEBUG2("Going to the next request");