2 * event.c Server event handling
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2007 The FreeRADIUS server project
21 * Copyright 2007 Alan DeKok <aland@deployingradius.com>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/radiusd.h>
28 #include <freeradius-devel/modules.h>
29 #include <freeradius-devel/event.h>
30 #include <freeradius-devel/detail.h>
32 #include <freeradius-devel/rad_assert.h>
37 #ifdef HAVE_SYS_WAIT_H
38 # include <sys/wait.h>
41 #define USEC (1000000)
43 extern pid_t radius_pid;
45 extern int check_config;
46 extern void force_log_reopen(void);
47 extern char *debug_condition;
50 * Ridiculous amounts of local state.
52 static fr_event_list_t *el = NULL;
53 static fr_packet_list_t *pl = NULL;
54 static int request_num_counter = 0;
55 static struct timeval now;
57 static int have_children;
58 static int just_started = TRUE;
62 #define WITH_SELF_PIPE (1)
67 static int self_pipe[2];
72 static pthread_mutex_t proxy_mutex;
75 #define PTHREAD_MUTEX_LOCK if (have_children) pthread_mutex_lock
76 #define PTHREAD_MUTEX_UNLOCK if (have_children) pthread_mutex_unlock
78 static pthread_t NO_SUCH_CHILD_PID;
81 * This is easier than ifdef's throughout the code.
83 #define PTHREAD_MUTEX_LOCK(_x)
84 #define PTHREAD_MUTEX_UNLOCK(_x)
85 int thread_pool_addrequest(REQUEST *request, RAD_REQUEST_FUNP fun)
87 radius_handle_request(request, fun);
92 #define INSERT_EVENT(_function, _ctx) if (!fr_event_insert(el, _function, _ctx, &((_ctx)->when), &((_ctx)->ev))) { _rad_panic(__FILE__, __LINE__, "Failed to insert event"); }
95 static fr_packet_list_t *proxy_list = NULL;
98 * We keep the proxy FD's here. The RADIUS Id's are marked
99 * "allocated" per Id, via a bit per proxy FD.
101 static int proxy_fds[32];
102 static rad_listen_t *proxy_listeners[32];
104 #define remove_from_proxy_hash(foo)
107 static void request_post_handler(REQUEST *request);
108 static void wait_a_bit(void *ctx);
109 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd, void *ctx);
111 static void event_poll_detail(void *ctx);
114 static void NEVER_RETURNS _rad_panic(const char *file, unsigned int line,
117 radlog(L_ERR, "[%s:%d] %s", file, line, msg);
121 #define rad_panic(x) _rad_panic(__FILE__, __LINE__, x)
124 static void tv_add(struct timeval *tv, int usec_delay)
126 if (usec_delay > USEC) {
127 tv->tv_sec += usec_delay / USEC;
130 tv->tv_usec += usec_delay;
132 if (tv->tv_usec > USEC) {
138 static void remove_from_request_hash(REQUEST *request)
140 if (!request->in_request_hash) return;
142 fr_packet_list_yank(pl, request->packet);
143 request->in_request_hash = FALSE;
145 request_stats_final(request);
150 static REQUEST *lookup_in_proxy_hash(RADIUS_PACKET *reply)
152 RADIUS_PACKET **proxy_p;
155 PTHREAD_MUTEX_LOCK(&proxy_mutex);
156 proxy_p = fr_packet_list_find_byreply(proxy_list, reply);
159 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
163 request = fr_packet2myptr(REQUEST, proxy, proxy_p);
166 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
170 request->num_proxied_responses++;
173 * Catch the most common case of everything working
176 if (request->num_proxied_requests == request->num_proxied_responses) {
177 fr_packet_list_yank(proxy_list, request->proxy);
178 fr_packet_list_id_free(proxy_list, request->proxy);
179 request->in_proxy_hash = FALSE;
183 * On the FIRST reply, decrement the count of outstanding
184 * requests. Note that this is NOT the count of sent
185 * packets, but whether or not the home server has
188 if (!request->proxy_reply &&
189 request->home_server &&
190 request->home_server->currently_outstanding) {
191 request->home_server->currently_outstanding--;
194 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
200 static void remove_from_proxy_hash(REQUEST *request)
203 * Check this without grabbing the mutex because it's a
204 * lot faster that way.
206 if (!request->in_proxy_hash) return;
209 * The "not in hash" flag is definitive. However, if the
210 * flag says that it IS in the hash, there might still be
211 * a race condition where it isn't.
213 PTHREAD_MUTEX_LOCK(&proxy_mutex);
215 if (!request->in_proxy_hash) {
216 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
220 fr_packet_list_yank(proxy_list, request->proxy);
221 fr_packet_list_id_free(proxy_list, request->proxy);
224 * The home server hasn't replied, but we've given up on
225 * this request. Don't count this request against the
228 if (!request->proxy_reply &&
229 request->home_server &&
230 request->home_server->currently_outstanding) {
231 request->home_server->currently_outstanding--;
235 * Got from YES in hash, to NO, not in hash while we hold
236 * the mutex. This guarantees that when another thread
237 * grans the mutex, the "not in hash" flag is correct.
239 request->in_proxy_hash = FALSE;
241 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
244 static void ev_request_free(REQUEST **prequest)
248 if (!prequest || !*prequest) return;
255 * Divorce the child from the parent first,
256 * then clean up the child.
258 request->coa->parent = NULL;
259 ev_request_free(&request->coa);
263 * Divorce the parent from the child, and leave the
264 * parent still alive.
266 if (request->parent && (request->parent->coa == request)) {
267 request->parent->coa = NULL;
271 if (request->ev) fr_event_delete(el, &request->ev);
272 if (request->in_proxy_hash) remove_from_proxy_hash(request);
273 if (request->in_request_hash) remove_from_request_hash(request);
275 request_free(prequest);
278 static int proxy_id_alloc(REQUEST *request, RADIUS_PACKET *packet)
281 rad_listen_t *proxy_listener;
283 if (fr_packet_list_id_alloc(proxy_list, packet)) return 1;
286 * Allocate a new proxy fd. This function adds
287 * it to the tail of the list of listeners. With
288 * some care, this can be thread-safe.
290 proxy_listener = proxy_new_listener(&packet->src_ipaddr, FALSE);
291 if (!proxy_listener) {
292 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
300 proxy = proxy_listener->fd;
301 for (i = 0; i < 32; i++) {
303 * Found a free entry. Save the socket,
304 * and remember where we saved it.
306 if (proxy_fds[(proxy + i) & 0x1f] == -1) {
307 found = (proxy + i) & 0x1f;
308 proxy_fds[found] = proxy;
309 proxy_listeners[found] = proxy_listener;
313 rad_assert(found >= 0);
315 if (!fr_packet_list_socket_add(proxy_list, proxy_listener->fd)) {
316 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
321 if (!fr_packet_list_id_alloc(proxy_list, packet)) {
322 RDEBUG2("ERROR: Failed to create a new socket for proxying requests.");
327 * Signal the main thread to add the new FD to the list
330 radius_signal_self(RADIUS_SIGNAL_SELF_NEW_FD);
335 static int insert_into_proxy_hash(REQUEST *request, int retransmit)
340 rad_assert(request->proxy != NULL);
341 rad_assert(proxy_list != NULL);
343 PTHREAD_MUTEX_LOCK(&proxy_mutex);
346 * Keep track of maximum outstanding requests to a
347 * particular home server. 'max_outstanding' is
348 * enforced in home_server_ldb(), in realms.c.
350 if (request->home_server) {
351 request->home_server->currently_outstanding++;
352 request->home_server->stats.total_requests++;
356 RADIUS_PACKET packet;
358 packet = *request->proxy;
360 if (!proxy_id_alloc(request, &packet)) {
361 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
366 * Yank the request, free the old Id, and
367 * remember the new Id.
369 fr_packet_list_yank(proxy_list, request->proxy);
370 fr_packet_list_id_free(proxy_list, request->proxy);
371 *request->proxy = packet;
373 } else if (!proxy_id_alloc(request, request->proxy)) {
374 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
378 rad_assert(request->proxy->sockfd >= 0);
381 * FIXME: Hack until we get rid of rad_listen_t, and put
382 * the information into the packet_list.
385 for (i = 0; i < 32; i++) {
386 if (proxy_fds[i] == request->proxy->sockfd) {
393 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
394 RDEBUG2("ERROR: All sockets are full.");
398 rad_assert(proxy_fds[proxy] != -1);
399 rad_assert(proxy_listeners[proxy] != NULL);
400 request->proxy_listener = proxy_listeners[proxy];
402 if (!fr_packet_list_insert(proxy_list, &request->proxy)) {
403 fr_packet_list_id_free(proxy_list, request->proxy);
404 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
405 RDEBUG2("ERROR: Failed to insert entry into proxy list");
409 request->in_proxy_hash = TRUE;
411 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
413 RDEBUG3(" proxy: allocating destination %s port %d - Id %d",
414 inet_ntop(request->proxy->dst_ipaddr.af,
415 &request->proxy->dst_ipaddr.ipaddr, buf, sizeof(buf)),
416 request->proxy->dst_port,
424 * Called as BOTH an event, and in-line from other functions.
426 static void wait_for_proxy_id_to_expire(void *ctx)
428 REQUEST *request = ctx;
430 rad_assert(request->magic == REQUEST_MAGIC);
431 rad_assert(request->proxy != NULL);
433 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
434 request->when = request->proxy_when;
437 if (((request->proxy->code == PW_COA_REQUEST) ||
438 (request->proxy->code == PW_DISCONNECT_REQUEST)) &&
439 (request->packet->code != request->proxy->code)) {
440 request->when.tv_sec += request->home_server->coa_mrd;
443 request->when.tv_sec += request->home_server->response_window;
445 if ((request->num_proxied_requests == request->num_proxied_responses) ||
446 timercmp(&now, &request->when, >)) {
447 if (request->packet) {
448 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
449 request->number, request->packet->id,
450 (unsigned int) (request->timestamp - fr_start_time));
452 RDEBUG2("Cleaning up request %d with timestamp +%d",
454 (unsigned int) (request->timestamp - fr_start_time));
457 ev_request_free(&request);
461 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
465 #ifdef HAVE_PTHREAD_H
466 static void wait_for_child_to_die(void *ctx)
468 REQUEST *request = ctx;
470 rad_assert(request->magic == REQUEST_MAGIC);
472 if ((request->child_state == REQUEST_QUEUED) |
473 (request->child_state == REQUEST_RUNNING)) {
474 request->delay += (request->delay >> 1);
475 tv_add(&request->when, request->delay);
477 RDEBUG2("Child is still stuck for request %d", request->number);
479 INSERT_EVENT(wait_for_child_to_die, request);
483 RDEBUG2("Child is finally responsive for request %d", request->number);
484 remove_from_request_hash(request);
487 if (request->proxy) {
488 wait_for_proxy_id_to_expire(request);
493 ev_request_free(&request);
497 static void cleanup_delay(void *ctx)
499 REQUEST *request = ctx;
501 rad_assert(request->magic == REQUEST_MAGIC);
502 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
503 (request->child_state == REQUEST_DONE));
505 remove_from_request_hash(request);
508 if (request->proxy && request->in_proxy_hash) {
509 wait_for_proxy_id_to_expire(request);
514 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
515 request->number, request->packet->id,
516 (unsigned int) (request->timestamp - fr_start_time));
518 ev_request_free(&request);
523 * FIXME: Put into a libradius function.
525 #define MAX_PACKET_CODE (52)
526 static const char *packet_codes[] = {
531 "Accounting-Request",
532 "Accounting-Response",
537 "Accounting-Message",
548 "Resource-Free-Request",
549 "Resource-Free-Response",
550 "Resource-Query-Request",
551 "Resource-Query-Response",
552 "Alternate-Resource-Reclaim-Request",
553 "NAS-Reboot-Request",
554 "NAS-Reboot-Response",
567 "Disconnect-Request",
577 "IP-Address-Allocate",
583 * In daemon mode, AND this request has debug flags set.
585 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
587 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
591 const char *received, *from;
592 const fr_ipaddr_t *ip;
597 rad_assert(request->radlog != NULL);
599 if (direction == 0) {
600 received = "Received";
601 from = "from"; /* what else? */
602 ip = &packet->src_ipaddr;
603 port = packet->src_port;
606 received = "Sending";
607 from = "to"; /* hah! */
608 ip = &packet->dst_ipaddr;
609 port = packet->dst_port;
613 * Client-specific debugging re-prints the input
614 * packet into the client log.
616 * This really belongs in a utility library
618 if ((packet->code > 0) && (packet->code < MAX_PACKET_CODE)) {
619 RDEBUG("%s %s packet %s host %s port %d, id=%d, length=%d",
620 received, packet_codes[packet->code], from,
621 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
622 port, packet->id, packet->data_len);
624 RDEBUG("%s packet %s host %s port %d code=%d, id=%d, length=%d",
626 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
628 packet->code, packet->id, packet->data_len);
631 for (vp = packet->vps; vp != NULL; vp = vp->next) {
632 vp_prints(buffer, sizeof(buffer), vp);
633 request->radlog(L_DBG, 0, request, "\t%s", buffer);
637 static void reject_delay(void *ctx)
639 REQUEST *request = ctx;
641 rad_assert(request->magic == REQUEST_MAGIC);
642 rad_assert(request->child_state == REQUEST_REJECT_DELAY);
644 RDEBUG2("Sending delayed reject for request %d", request->number);
646 DEBUG_PACKET(request, request->reply, 1);
648 request->listener->send(request->listener, request);
650 request->when.tv_sec += request->root->cleanup_delay;
651 request->child_state = REQUEST_CLEANUP_DELAY;
653 INSERT_EVENT(cleanup_delay, request);
658 void revive_home_server(void *ctx)
660 home_server *home = ctx;
663 home->state = HOME_STATE_ALIVE;
664 home->currently_outstanding = 0;
665 home->revive_time = now;
668 * Delete any outstanding events.
670 if (home->ev) fr_event_delete(el, &home->ev);
672 radlog(L_INFO, "PROXY: Marking home server %s port %d alive again... we have no idea if it really is alive or not.",
673 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
674 buffer, sizeof(buffer)),
680 static void no_response_to_ping(void *ctx)
682 REQUEST *request = ctx;
686 rad_assert(request->home_server != NULL);
688 home = request->home_server;
689 home->num_received_pings = 0;
691 RDEBUG2("No response to status check %d from home server %s port %d",
693 inet_ntop(request->proxy->dst_ipaddr.af,
694 &request->proxy->dst_ipaddr.ipaddr,
695 buffer, sizeof(buffer)),
696 request->proxy->dst_port);
698 wait_for_proxy_id_to_expire(request);
702 static void received_response_to_ping(REQUEST *request)
707 rad_assert(request->home_server != NULL);
709 home = request->home_server;
710 home->num_received_pings++;
712 RDEBUG2("Received response to status check %d (%d in current sequence)",
713 request->number, home->num_received_pings);
716 * Remove the request from any hashes
718 fr_event_delete(el, &request->ev);
719 remove_from_proxy_hash(request);
720 rad_assert(request->in_request_hash == FALSE);
723 * The control socket may have marked the home server as
724 * alive. OR, it may have suddenly started responding to
725 * requests again. If so, don't re-do the "make alive"
728 if (home->state == HOME_STATE_ALIVE) return;
731 * We haven't received enough ping responses to mark it
732 * "alive". Wait a bit.
734 if (home->num_received_pings < home->num_pings_to_alive) {
738 home->state = HOME_STATE_ALIVE;
739 home->currently_outstanding = 0;
740 home->revive_time = now;
742 if (!fr_event_delete(el, &home->ev)) {
743 RDEBUG2("Hmm... no event for home server. Oh well.");
746 radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
747 inet_ntop(request->proxy->dst_ipaddr.af,
748 &request->proxy->dst_ipaddr.ipaddr,
749 buffer, sizeof(buffer)),
750 request->proxy->dst_port);
755 * Called from start of zombie period, OR after control socket
756 * marks the home server dead.
758 static void ping_home_server(void *ctx)
761 home_server *home = ctx;
765 if ((home->state == HOME_STATE_ALIVE) ||
766 (home->ping_check == HOME_PING_CHECK_NONE)) {
770 request = request_alloc();
771 request->number = request_num_counter++;
773 request->proxy = rad_alloc(1);
774 rad_assert(request->proxy != NULL);
776 fr_event_now(el, &request->when);
777 home->when = request->when;
779 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
780 request->proxy->code = PW_STATUS_SERVER;
782 radius_pairmake(request, &request->proxy->vps,
783 "Message-Authenticator", "0x00", T_OP_SET);
785 } else if (home->type == HOME_TYPE_AUTH) {
786 request->proxy->code = PW_AUTHENTICATION_REQUEST;
788 radius_pairmake(request, &request->proxy->vps,
789 "User-Name", home->ping_user_name, T_OP_SET);
790 radius_pairmake(request, &request->proxy->vps,
791 "User-Password", home->ping_user_password, T_OP_SET);
792 radius_pairmake(request, &request->proxy->vps,
793 "Service-Type", "Authenticate-Only", T_OP_SET);
794 radius_pairmake(request, &request->proxy->vps,
795 "Message-Authenticator", "0x00", T_OP_SET);
798 #ifdef WITH_ACCOUNTING
799 request->proxy->code = PW_ACCOUNTING_REQUEST;
801 radius_pairmake(request, &request->proxy->vps,
802 "User-Name", home->ping_user_name, T_OP_SET);
803 radius_pairmake(request, &request->proxy->vps,
804 "Acct-Status-Type", "Stop", T_OP_SET);
805 radius_pairmake(request, &request->proxy->vps,
806 "Acct-Session-Id", "00000000", T_OP_SET);
807 vp = radius_pairmake(request, &request->proxy->vps,
808 "Event-Timestamp", "0", T_OP_SET);
809 vp->vp_date = now.tv_sec;
811 rad_assert("Internal sanity check failed");
815 radius_pairmake(request, &request->proxy->vps,
816 "NAS-Identifier", "Status Check. Are you alive?",
819 request->proxy->dst_ipaddr = home->ipaddr;
820 request->proxy->dst_port = home->port;
821 request->home_server = home;
823 rad_assert(request->proxy_listener == NULL);
825 if (!insert_into_proxy_hash(request, FALSE)) {
826 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash. Discarding it.",
828 ev_request_free(&request);
831 rad_assert(request->proxy_listener != NULL);
832 request->proxy_listener->send(request->proxy_listener,
835 request->next_callback = NULL;
836 request->child_state = REQUEST_PROXIED;
837 request->when.tv_sec += home->ping_timeout;;
839 INSERT_EVENT(no_response_to_ping, request);
842 * Add +/- 2s of jitter, as suggested in RFC 3539
843 * and in the Issues and Fixes draft.
845 home->when.tv_sec += home->ping_interval - 2;
848 jitter ^= (jitter >> 10);
849 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
851 tv_add(&home->when, jitter);
853 INSERT_EVENT(ping_home_server, home);
857 void mark_home_server_dead(home_server *home, struct timeval *when)
859 int previous_state = home->state;
862 radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
863 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
864 buffer, sizeof(buffer)),
867 home->state = HOME_STATE_IS_DEAD;
868 home->num_received_pings = 0;
870 if (home->ping_check != HOME_PING_CHECK_NONE) {
872 * If the control socket marks us dead, start
873 * pinging. Otherwise, we already started
874 * pinging when it was marked "zombie".
876 if (previous_state == HOME_STATE_ALIVE) {
877 ping_home_server(home);
882 * Revive it after a fixed period of time. This
883 * is very, very, bad.
886 home->when.tv_sec += home->revive_interval;
888 INSERT_EVENT(revive_home_server, home);
892 static void check_for_zombie_home_server(REQUEST *request)
897 home = request->home_server;
899 if (home->state != HOME_STATE_ZOMBIE) return;
901 when = home->zombie_period_start;
902 when.tv_sec += home->zombie_period;
904 fr_event_now(el, &now);
905 if (timercmp(&now, &when, <)) {
909 mark_home_server_dead(home, &request->when);
912 static int proxy_to_virtual_server(REQUEST *request);
914 static int virtual_server_handler(UNUSED REQUEST *request)
916 proxy_to_virtual_server(request);
920 static void proxy_fallback_handler(REQUEST *request)
923 * A proper time is required for wait_a_bit.
925 request->delay = USEC / 10;
926 gettimeofday(&now, NULL);
927 request->next_when = now;
928 tv_add(&request->next_when, request->delay);
929 request->next_callback = wait_a_bit;
932 * Re-queue the request.
934 request->child_state = REQUEST_QUEUED;
936 rad_assert(request->proxy != NULL);
937 if (!thread_pool_addrequest(request, virtual_server_handler)) {
938 request->child_state = REQUEST_DONE;
941 #ifdef HAVE_PTHREAD_H
943 * MAY free the request if we're over max_request_time,
944 * AND we're not in threaded mode!
946 * Note that we call this ONLY if we're threaded, as
947 * if we're NOT threaded, request_post_handler() calls
948 * wait_a_bit(), which means that "request" may not
951 if (have_children) wait_a_bit(request);
956 static int setup_post_proxy_fail(REQUEST *request)
958 DICT_VALUE *dval = NULL;
961 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
962 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
964 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
965 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
969 * See no_response_to_coa_request
971 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
972 request->packet->code &= 0xff; /* restore it */
974 if (request->proxy->code == PW_COA_REQUEST) {
975 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
977 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
978 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
988 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
991 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
995 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
996 if (!vp) vp = radius_paircreate(request, &request->config_items,
997 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
998 vp->vp_integer = dval->value;
1000 rad_assert(request->proxy_reply == NULL);
1006 static int null_handler(UNUSED REQUEST *request)
1011 static void post_proxy_fail_handler(REQUEST *request)
1014 * A proper time is required for wait_a_bit.
1016 request->delay = USEC / 10;
1017 gettimeofday(&now, NULL);
1020 * Not set up to run Post-Proxy-Type = Fail.
1022 * Mark the request as still running, and figure out what
1025 if (!setup_post_proxy_fail(request)) {
1026 request->child_state = REQUEST_RUNNING;
1027 request_post_handler(request);
1031 * Re-queue the request.
1033 request->child_state = REQUEST_QUEUED;
1036 * There is a post-proxy-type of fail. We run
1037 * the request through the pre/post proxy
1038 * handlers, just like it was a real proxied
1039 * request. However, we set the per-request
1040 * handler to NULL, as we don't want to do
1043 * Note that when we're not threaded, this will
1044 * process the request even if it's greater than
1045 * max_request_time. That's not fatal.
1047 request->priority = 0;
1048 rad_assert(request->proxy != NULL);
1049 thread_pool_addrequest(request, null_handler);
1053 * MAY free the request if we're over max_request_time,
1054 * AND we're not in threaded mode!
1056 * Note that we call this ONLY if we're threaded, as
1057 * if we're NOT threaded, request_post_handler() calls
1058 * wait_a_bit(), which means that "request" may not
1061 if (have_children) wait_a_bit(request);
1065 /* maybe check this against wait_for_proxy_id_to_expire? */
1066 static void no_response_to_proxied_request(void *ctx)
1068 REQUEST *request = ctx;
1072 rad_assert(request->magic == REQUEST_MAGIC);
1073 rad_assert(request->child_state == REQUEST_PROXIED);
1076 * If we've failed over to an internal home server,
1077 * replace the callback with the correct one. This
1078 * is due to locking issues with child threads...
1080 if (request->home_server->server) {
1081 wait_a_bit(request);
1085 radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1087 inet_ntop(request->proxy->dst_ipaddr.af,
1088 &request->proxy->dst_ipaddr.ipaddr,
1089 buffer, sizeof(buffer)),
1090 request->proxy->dst_port);
1092 check_for_zombie_home_server(request);
1094 home = request->home_server;
1096 post_proxy_fail_handler(request);
1099 * Don't touch request due to race conditions
1101 if (home->state == HOME_STATE_IS_DEAD) {
1102 rad_assert(home->ev != NULL); /* or it will never wake up */
1107 * Enable the zombie period when we notice that the home
1108 * server hasn't responded. We do NOT back-date the start
1109 * of the zombie period.
1111 if (home->state == HOME_STATE_ALIVE) {
1112 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1113 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1114 buffer, sizeof(buffer)),
1116 home->state = HOME_STATE_ZOMBIE;
1117 home->zombie_period_start = now;
1120 * Start pinging the home server.
1122 ping_home_server(home);
1127 static void wait_a_bit(void *ctx)
1129 struct timeval when;
1130 REQUEST *request = ctx;
1131 fr_event_callback_t callback = NULL;
1133 rad_assert(request->magic == REQUEST_MAGIC);
1137 * The CoA request is a new (internally generated)
1138 * request, created in a child thread. We therefore need
1139 * some way to tie its events back into the main event
1142 if (request->coa && !request->coa->proxy_reply &&
1143 request->coa->next_callback) {
1144 request->coa->when = request->coa->next_when;
1145 INSERT_EVENT(request->coa->next_callback, request->coa);
1146 request->coa->next_callback = NULL;
1147 request->coa->parent = NULL;
1148 request->coa = NULL;
1152 switch (request->child_state) {
1153 case REQUEST_QUEUED:
1154 case REQUEST_RUNNING:
1155 when = request->received;
1156 when.tv_sec += request->root->max_request_time;
1159 * Normally called from the event loop with the
1160 * proper event loop time. Otherwise, called from
1161 * post proxy fail handler, which sets "now", and
1162 * this call won't re-set it, because we're not
1163 * in the event loop.
1165 fr_event_now(el, &now);
1168 * Request still has more time. Continue
1171 if (timercmp(&now, &when, <) ||
1172 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1173 (request->child_state == REQUEST_QUEUED))) {
1174 if (request->delay < (USEC / 10)) {
1175 request->delay = USEC / 10;
1177 request->delay += request->delay >> 1;
1181 * Cap wait at some sane value for detail
1184 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1185 (request->delay > (request->root->max_request_time * USEC))) {
1186 request->delay = request->root->max_request_time * USEC;
1190 request->when = now;
1191 tv_add(&request->when, request->delay);
1192 callback = wait_a_bit;
1196 #if defined(HAVE_PTHREAD_H) || defined(WITH_PROXY)
1198 * A child thread MAY still be running on the
1199 * request. Ask the thread to stop working on
1202 if (have_children) {
1203 /* FIXME: kill unresponsive children? */
1206 * Print this error message ONLY if
1207 * there's a child currently processing
1208 * the request. As we don't have thread
1209 * locks here, there may be race
1210 * conditions on this check. But it's
1211 * just an error message, so that's OK.
1213 if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1214 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1216 request->module ? request->module : "<server core>",
1217 request->component ? request->component : "<server core>");
1220 request->master_state = REQUEST_STOP_PROCESSING;
1222 request->delay = USEC / 4;
1223 tv_add(&request->when, request->delay);
1224 callback = wait_for_child_to_die;
1230 * Else there are no child threads. We probably
1231 * should have just marked the request as 'done'
1232 * elsewhere, like in the post-proxy-fail
1233 * handler. But doing that would involve
1234 * checking for max_request_time in multiple
1235 * places, so this may be simplest.
1237 request->child_state = REQUEST_DONE;
1241 * Mark the request as no longer running,
1245 #ifdef HAVE_PTHREAD_H
1246 request->child_pid = NO_SUCH_CHILD_PID;
1251 * This is a CoA request. It's been divorced
1252 * from everything else, so we clean it up now.
1254 if (!request->in_request_hash &&
1256 (request->packet->code != request->proxy->code) &&
1257 ((request->proxy->code == PW_COA_REQUEST) ||
1258 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1260 * FIXME: Do CoA MIBs
1262 ev_request_free(&request);
1266 request_stats_final(request);
1267 cleanup_delay(request);
1270 case REQUEST_REJECT_DELAY:
1271 case REQUEST_CLEANUP_DELAY:
1272 #ifdef HAVE_PTHREAD_H
1273 request->child_pid = NO_SUCH_CHILD_PID;
1275 request_stats_final(request);
1277 case REQUEST_PROXIED:
1278 rad_assert(request->next_callback != NULL);
1279 rad_assert(request->next_callback != wait_a_bit);
1281 request->when = request->next_when;
1282 callback = request->next_callback;
1283 request->next_callback = NULL;
1287 rad_panic("Internal sanity check failure");
1292 * Something major went wrong. Discard the request, and
1295 * FIXME: No idea why this happens or how to fix it...
1296 * It seems to happen *only* when requests are proxied,
1297 * and where the home server doesn't respond. So it looks
1298 * like a race condition above, but it happens in debug
1299 * mode, with no threads...
1302 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1303 ev_request_free(&request);
1307 INSERT_EVENT(callback, request);
1311 static void no_response_to_coa_request(void *ctx)
1313 REQUEST *request = ctx;
1316 rad_assert(request->magic == REQUEST_MAGIC);
1317 rad_assert(request->child_state == REQUEST_PROXIED);
1318 rad_assert(request->home_server != NULL);
1319 rad_assert(!request->in_request_hash);
1321 radlog(L_ERR, "No response to CoA request sent to %s",
1322 inet_ntop(request->proxy->dst_ipaddr.af,
1323 &request->proxy->dst_ipaddr.ipaddr,
1324 buffer, sizeof(buffer)));
1329 request->packet->code |= (PW_COA_REQUEST << 8);
1330 post_proxy_fail_handler(request);
1334 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1338 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1345 packet->data = NULL;
1346 packet->data_len = 0;
1349 return 1; /* time stamp updated */
1354 * Called when we haven't received a response to a CoA request.
1356 static void retransmit_coa_request(void *ctx)
1360 REQUEST *request = ctx;
1362 rad_assert(request->magic == REQUEST_MAGIC);
1363 rad_assert(request->child_state == REQUEST_PROXIED);
1364 rad_assert(request->home_server != NULL);
1365 rad_assert(!request->in_request_hash);
1366 rad_assert(request->parent == NULL);
1368 fr_event_now(el, &now);
1371 * Cap count at MRC, if it is non-zero.
1373 if (request->home_server->coa_mrc &&
1374 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1375 no_response_to_coa_request(request);
1380 * RFC 5080 Section 2.2.1
1382 * RT = 2*RTprev + RAND*RTprev
1383 * = 1.9 * RTprev + rand(0,.2) * RTprev
1384 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1387 delay ^= (delay >> 16);
1389 frac = request->delay / 5;
1390 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1392 delay += (2 * request->delay) - (request->delay / 10);
1395 * Cap delay at MRT, if MRT is non-zero.
1397 if (request->home_server->coa_mrt &&
1398 (delay > (request->home_server->coa_mrt * USEC))) {
1399 int mrt_usec = request->home_server->coa_mrt * USEC;
1402 * delay = MRT + RAND * MRT
1403 * = 0.9 MRT + rand(0,.2) * MRT
1406 delay ^= (delay >> 15);
1408 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1409 delay += mrt_usec - (mrt_usec / 10);
1412 request->delay = delay;
1413 request->when = now;
1414 tv_add(&request->when, request->delay);
1415 mrd = request->proxy_when;
1416 mrd.tv_sec += request->home_server->coa_mrd;
1419 * Cap duration at MRD.
1421 if (timercmp(&mrd, &request->when, <)) {
1422 request->when = mrd;
1423 INSERT_EVENT(no_response_to_coa_request, request);
1426 INSERT_EVENT(retransmit_coa_request, request);
1429 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1430 if (!insert_into_proxy_hash(request, TRUE)) {
1431 DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1435 request->num_proxied_requests = 0;
1436 request->num_proxied_responses = 0;
1439 request->num_proxied_requests++;
1440 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1442 request->proxy_listener->send(request->proxy_listener,
1448 * The original request is either DONE, or in CLEANUP_DELAY.
1450 static int originated_coa_request(REQUEST *request)
1452 int delay, rcode, pre_proxy_type = 0;
1458 rad_assert(request->proxy == NULL);
1459 rad_assert(!request->in_proxy_hash);
1460 rad_assert(request->proxy_reply == NULL);
1462 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1463 if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1465 if (vp->vp_integer == 0) {
1466 ev_request_free(&request->coa);
1467 return 1; /* success */
1470 if (!request->coa) request_alloc_coa(request);
1471 if (!request->coa) return 0;
1477 * src_ipaddr will be set up in proxy_encode.
1479 memset(&ipaddr, 0, sizeof(ipaddr));
1480 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1482 ipaddr.af = AF_INET;
1483 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1485 } else if ((vp = pairfind(coa->proxy->vps,
1486 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1487 ipaddr.af = AF_INET6;
1488 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1490 } else if ((vp = pairfind(coa->proxy->vps,
1491 PW_HOME_SERVER_POOL)) != NULL) {
1492 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1494 if (!coa->home_pool) {
1495 RDEBUG2("WARNING: No such home_server_pool %s",
1498 ev_request_free(&request->coa);
1505 } else if (request->client->coa_pool) {
1506 coa->home_pool = request->client->coa_pool;
1508 } else if (request->client->coa_server) {
1509 coa->home_server = request->client->coa_server;
1513 * If all else fails, send it to the client that
1514 * originated this request.
1516 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1520 * Use the pool, if it exists.
1522 if (coa->home_pool) {
1523 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1524 if (!coa->home_server) {
1525 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1529 } else if (!coa->home_server) {
1530 int port = PW_COA_UDP_PORT;
1532 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1533 if (vp) port = vp->vp_integer;
1535 coa->home_server = home_server_find(&ipaddr, port);
1536 if (!coa->home_server) {
1537 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1538 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1539 buffer, sizeof(buffer)), port);
1544 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1546 switch (vp->vp_integer) {
1547 case PW_COA_REQUEST:
1548 case PW_DISCONNECT_REQUEST:
1549 coa->proxy->code = vp->vp_integer;
1553 DEBUG("Cannot set CoA Packet-Type to code %d",
1559 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1562 * The rest of the server code assumes that
1563 * request->packet && request->reply exist. Copy them
1564 * from the original request.
1566 rad_assert(coa->packet != NULL);
1567 rad_assert(coa->packet->vps == NULL);
1568 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1569 coa->packet->vps = paircopy(request->packet->vps);
1570 coa->packet->data = NULL;
1571 rad_assert(coa->reply != NULL);
1572 rad_assert(coa->reply->vps == NULL);
1573 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1574 coa->reply->vps = paircopy(request->reply->vps);
1575 coa->reply->data = NULL;
1576 coa->config_items = paircopy(request->config_items);
1579 * Call the pre-proxy routines.
1581 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1583 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1584 pre_proxy_type = vp->vp_integer;
1587 if (coa->home_pool && coa->home_pool->virtual_server) {
1588 const char *old_server = coa->server;
1590 coa->server = coa->home_pool->virtual_server;
1591 RDEBUG2(" server %s {", coa->server);
1592 rcode = module_pre_proxy(pre_proxy_type, coa);
1594 coa->server = old_server;
1596 rcode = module_pre_proxy(pre_proxy_type, coa);
1603 * Only send the CoA packet if the pre-proxy code succeeded.
1605 case RLM_MODULE_NOOP:
1607 case RLM_MODULE_UPDATED:
1612 * Source IP / port is set when the proxy socket
1615 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1616 coa->proxy->dst_port = coa->home_server->port;
1618 if (!insert_into_proxy_hash(coa, FALSE)) {
1619 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1624 * We CANNOT divorce the CoA request from the parent
1625 * request. This function is running in a child thread,
1626 * and we need access to the main event loop in order to
1627 * to add the timers for the CoA packet. See
1632 * Forget about the original request completely at this
1637 gettimeofday(&request->proxy_when, NULL);
1638 request->received = request->next_when = request->proxy_when;
1639 rad_assert(request->proxy_reply == NULL);
1642 * Implement re-transmit algorithm as per RFC 5080
1645 * We want IRT + RAND*IRT
1646 * or 0.9 IRT + rand(0,.2) IRT
1648 * 2^20 ~ USEC, and we want 2.
1649 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1651 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1652 request->delay = delay * request->home_server->coa_irt;
1653 delay = request->home_server->coa_irt * USEC;
1654 delay -= delay / 10;
1655 delay += request->delay;
1657 request->delay = delay;
1658 tv_add(&request->next_when, delay);
1659 request->next_callback = retransmit_coa_request;
1662 * Note that we set proxied BEFORE sending the packet.
1664 * Once we send it, the request is tainted, as
1665 * another thread may have picked it up. Don't
1668 request->num_proxied_requests = 1;
1669 request->num_proxied_responses = 0;
1670 request->child_pid = NO_SUCH_CHILD_PID;
1672 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1674 request->child_state = REQUEST_PROXIED;
1676 DEBUG_PACKET(request, request->proxy, 1);
1678 request->proxy_listener->send(request->proxy_listener,
1682 #endif /* WITH_COA */
1685 static int process_proxy_reply(REQUEST *request)
1688 int post_proxy_type = 0;
1692 * Delete any reply we had accumulated until now.
1694 pairfree(&request->reply->vps);
1697 * Run the packet through the post-proxy stage,
1698 * BEFORE playing games with the attributes.
1700 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1702 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1703 post_proxy_type = vp->vp_integer;
1706 if (request->home_pool && request->home_pool->virtual_server) {
1707 const char *old_server = request->server;
1709 request->server = request->home_pool->virtual_server;
1710 RDEBUG2(" server %s {", request->server);
1711 rcode = module_post_proxy(post_proxy_type, request);
1713 request->server = old_server;
1715 rcode = module_post_proxy(post_proxy_type, request);
1719 if (request->packet->code == request->proxy->code)
1721 * Don't run the next bit if we originated a CoA
1722 * packet, after receiving an Access-Request or
1723 * Accounting-Request.
1728 * There may NOT be a proxy reply, as we may be
1729 * running Post-Proxy-Type = Fail.
1731 if (request->proxy_reply) {
1733 * Delete the Proxy-State Attributes from
1734 * the reply. These include Proxy-State
1735 * attributes from us and remote server.
1737 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1740 * Add the attributes left in the proxy
1741 * reply to the reply list.
1743 pairadd(&request->reply->vps, request->proxy_reply->vps);
1744 request->proxy_reply->vps = NULL;
1747 * Free proxy request pairs.
1749 pairfree(&request->proxy->vps);
1753 default: /* Don't do anything */
1755 case RLM_MODULE_FAIL:
1756 /* FIXME: debug print stuff */
1757 request->child_state = REQUEST_DONE;
1760 case RLM_MODULE_HANDLED:
1761 /* FIXME: debug print stuff */
1762 request->child_state = REQUEST_DONE;
1770 static int request_pre_handler(REQUEST *request)
1774 rad_assert(request->magic == REQUEST_MAGIC);
1775 rad_assert(request->packet != NULL);
1777 request->child_state = REQUEST_RUNNING;
1780 * Don't decode the packet if it's an internal "fake"
1781 * request. Instead, just return so that the caller can
1784 if (request->packet->dst_port == 0) {
1785 request->username = pairfind(request->packet->vps,
1787 request->password = pairfind(request->packet->vps,
1794 * Put the decoded packet into it's proper place.
1796 if (request->proxy_reply != NULL) {
1797 rcode = request->proxy_listener->decode(request->proxy_listener,
1799 DEBUG_PACKET(request, request->proxy_reply, 0);
1802 if (request->packet->vps == NULL) {
1803 rcode = request->listener->decode(request->listener, request);
1805 if (debug_condition) {
1807 const char *my_debug = debug_condition;
1810 * Ignore parse errors.
1812 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1816 request->options = 2;
1817 request->radlog = radlog_request;
1821 DEBUG_PACKET(request, request->packet, 0);
1827 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1828 request->child_state = REQUEST_DONE;
1832 if (!request->username) {
1833 request->username = pairfind(request->packet->vps,
1838 if (request->proxy) {
1839 return process_proxy_reply(request);
1849 * Do state handling when we proxy a request.
1851 static int proxy_request(REQUEST *request)
1853 struct timeval when;
1856 if (request->home_server->server) {
1857 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1861 if (!insert_into_proxy_hash(request, FALSE)) {
1862 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1866 request->proxy_listener->encode(request->proxy_listener, request);
1868 when = request->received;
1869 when.tv_sec += request->root->max_request_time;
1871 gettimeofday(&request->proxy_when, NULL);
1873 request->next_when = request->proxy_when;
1874 request->next_when.tv_sec += request->home_server->response_window;
1876 rad_assert(request->home_server->response_window > 0);
1878 if (timercmp(&when, &request->next_when, <)) {
1879 request->next_when = when;
1881 request->next_callback = no_response_to_proxied_request;
1883 RDEBUG2("Proxying request %d to home server %s port %d",
1885 inet_ntop(request->proxy->dst_ipaddr.af,
1886 &request->proxy->dst_ipaddr.ipaddr,
1887 buffer, sizeof(buffer)),
1888 request->proxy->dst_port);
1891 * Note that we set proxied BEFORE sending the packet.
1893 * Once we send it, the request is tainted, as
1894 * another thread may have picked it up. Don't
1897 request->num_proxied_requests = 1;
1898 request->num_proxied_responses = 0;
1899 #ifdef HAVE_PTHREAD_H
1900 request->child_pid = NO_SUCH_CHILD_PID;
1902 request->child_state = REQUEST_PROXIED;
1904 DEBUG_PACKET(request, request->proxy, 1);
1906 request->proxy_listener->send(request->proxy_listener,
1913 * "Proxy" the request by sending it to a new virtual server.
1915 static int proxy_to_virtual_server(REQUEST *request)
1918 RAD_REQUEST_FUNP fun;
1920 if (!request->home_server || !request->home_server->server) return 0;
1922 if (request->parent) {
1923 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1927 fake = request_alloc_fake(request);
1929 RDEBUG2("WARNING: Out of memory");
1933 fake->packet->vps = paircopy(request->proxy->vps);
1934 fake->server = request->home_server->server;
1936 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1937 fun = rad_authenticate;
1939 #ifdef WITH_ACCOUNTING
1940 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1941 fun = rad_accounting;
1945 RDEBUG2("Unknown packet type %d", request->proxy->code);
1946 ev_request_free(&fake);
1950 RDEBUG2(">>> Sending proxied request internally to virtual server.");
1951 radius_handle_request(fake, fun);
1952 RDEBUG2("<<< Received proxied response code %d from internal virtual server.", fake->reply->code);
1954 if (fake->reply->code != 0) {
1955 request->proxy_reply = fake->reply;
1959 * There was no response
1961 setup_post_proxy_fail(request);
1964 ev_request_free(&fake);
1966 process_proxy_reply(request);
1969 * Process it through the normal section again, but ONLY
1970 * if we received a proxy reply..
1972 if (request->proxy_reply) {
1973 if (request->server) RDEBUG("server %s {",
1974 request->server != NULL ?
1975 request->server : "");
1978 if (request->server) RDEBUG("} # server %s",
1979 request->server != NULL ?
1980 request->server : "");
1983 return 2; /* success, but NOT '1' !*/
1987 * Return 1 if we did proxy it, or the proxy attempt failed
1988 * completely. Either way, the caller doesn't touch the request
1989 * any more if we return 1.
1991 static int successfully_proxied_request(REQUEST *request)
1994 int pre_proxy_type = 0;
1995 VALUE_PAIR *realmpair;
1996 VALUE_PAIR *strippedname;
1998 char *realmname = NULL;
2000 REALM *realm = NULL;
2004 * If it was already proxied, do nothing.
2006 * FIXME: This should really be a serious error.
2008 if (request->in_proxy_hash ||
2009 (request->proxy_reply && (request->proxy_reply->code != 0))) {
2013 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2014 if (!realmpair || (realmpair->length == 0)) {
2017 vp = pairfind(request->config_items, PW_HOME_SERVER_POOL);
2020 switch (request->packet->code) {
2021 case PW_AUTHENTICATION_REQUEST:
2022 pool_type = HOME_TYPE_AUTH;
2025 #ifdef WITH_ACCOUNTING
2026 case PW_ACCOUNTING_REQUEST:
2027 pool_type = HOME_TYPE_ACCT;
2032 case PW_COA_REQUEST:
2033 case PW_DISCONNECT_REQUEST:
2034 pool_type = HOME_TYPE_COA;
2042 pool = home_pool_byname(vp->vp_strvalue, pool_type);
2044 RDEBUG2("ERROR: Cannot proxy to unknown pool %s",
2049 realmname = NULL; /* no realms */
2054 realmname = (char *) realmpair->vp_strvalue;
2056 realm = realm_find2(realmname);
2058 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2063 * Figure out which pool to use.
2065 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2066 pool = realm->auth_pool;
2068 #ifdef WITH_ACCOUNTING
2069 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2070 pool = realm->acct_pool;
2074 } else if ((request->packet->code == PW_COA_REQUEST) ||
2075 (request->packet->code == PW_DISCONNECT_REQUEST)) {
2076 pool = realm->acct_pool;
2080 rad_panic("Internal sanity check failed");
2084 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2090 home = home_server_ldb(realmname, pool, request);
2092 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2096 request->home_pool = pool;
2100 * Once we've decided to proxy a request, we cannot send
2101 * a CoA packet. So we free up any CoA packet here.
2103 ev_request_free(&request->coa);
2106 * Remember that we sent the request to a Realm.
2108 if (realmname) pairadd(&request->packet->vps,
2109 pairmake("Realm", realmname, T_OP_EQ));
2112 * Strip the name, if told to.
2114 * Doing it here catches the case of proxied tunneled
2117 if (realm && (realm->striprealm == TRUE) &&
2118 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2120 * If there's a Stripped-User-Name attribute in
2121 * the request, then use THAT as the User-Name
2122 * for the proxied request, instead of the
2125 * This is done by making a copy of the
2126 * Stripped-User-Name attribute, turning it into
2127 * a User-Name attribute, deleting the
2128 * Stripped-User-Name and User-Name attributes
2129 * from the vps list, and making the new
2130 * User-Name the head of the vps list.
2132 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2134 vp = radius_paircreate(request, NULL,
2135 PW_USER_NAME, PW_TYPE_STRING);
2136 rad_assert(vp != NULL); /* handled by above function */
2137 /* Insert at the START of the list */
2138 vp->next = request->proxy->vps;
2139 request->proxy->vps = vp;
2141 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2142 sizeof(vp->vp_strvalue));
2143 vp->length = strippedname->length;
2146 * Do NOT delete Stripped-User-Name.
2151 * If there is no PW_CHAP_CHALLENGE attribute but
2152 * there is a PW_CHAP_PASSWORD we need to add it
2153 * since we can't use the request authenticator
2154 * anymore - we changed it.
2156 if ((request->packet->code == PW_AUTHENTICATION_REQUEST) &&
2157 pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2158 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2159 vp = radius_paircreate(request, &request->proxy->vps,
2160 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2161 vp->length = AUTH_VECTOR_LEN;
2162 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2166 * The RFC's say we have to do this, but FreeRADIUS
2169 vp = radius_paircreate(request, &request->proxy->vps,
2170 PW_PROXY_STATE, PW_TYPE_OCTETS);
2171 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2172 request->packet->id);
2173 vp->length = strlen(vp->vp_strvalue);
2176 * Should be done BEFORE inserting into proxy hash, as
2177 * pre-proxy may use this information, or change it.
2179 request->proxy->code = request->packet->code;
2182 * Call the pre-proxy routines.
2184 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2186 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2187 pre_proxy_type = vp->vp_integer;
2190 rad_assert(request->home_pool != NULL);
2192 if (request->home_pool->virtual_server) {
2193 const char *old_server = request->server;
2195 request->server = request->home_pool->virtual_server;
2196 RDEBUG2(" server %s {", request->server);
2197 rcode = module_pre_proxy(pre_proxy_type, request);
2199 request->server = old_server;
2201 rcode = module_pre_proxy(pre_proxy_type, request);
2204 case RLM_MODULE_FAIL:
2205 case RLM_MODULE_INVALID:
2206 case RLM_MODULE_NOTFOUND:
2207 case RLM_MODULE_USERLOCK:
2209 /* FIXME: debug print failed stuff */
2212 case RLM_MODULE_REJECT:
2213 case RLM_MODULE_HANDLED:
2217 * Only proxy the packet if the pre-proxy code succeeded.
2219 case RLM_MODULE_NOOP:
2221 case RLM_MODULE_UPDATED:
2226 * If it's a fake request, don't send the proxy
2227 * packet. The outer tunnel session will take
2228 * care of doing that.
2230 if (request->packet->dst_port == 0) {
2231 request->home_server = NULL;
2235 if (request->home_server->server) {
2236 return proxy_to_virtual_server(request);
2239 if (!proxy_request(request)) {
2240 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2248 static void request_post_handler(REQUEST *request)
2250 int child_state = -1;
2251 struct timeval when;
2254 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2256 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2257 RDEBUG2("Request %d was cancelled.", request->number);
2258 #ifdef HAVE_PTHREAD_H
2259 request->child_pid = NO_SUCH_CHILD_PID;
2261 child_state = REQUEST_DONE;
2265 if (request->child_state != REQUEST_RUNNING) {
2266 rad_panic("Internal sanity check failed");
2271 * If it's not in the request hash, it's a CoA request.
2274 if (!request->in_request_hash &&
2276 ((request->proxy->code == PW_COA_REQUEST) ||
2277 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2278 request->next_callback = NULL;
2279 child_state = REQUEST_DONE;
2284 if ((request->reply->code == 0) &&
2285 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2286 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2287 request->reply->code = PW_AUTHENTICATION_REJECT;
2291 if (request->root->proxy_requests &&
2292 !request->in_proxy_hash &&
2293 (request->reply->code == 0) &&
2294 (request->packet->dst_port != 0) &&
2295 (request->packet->code != PW_STATUS_SERVER)) {
2296 int rcode = successfully_proxied_request(request);
2298 if (rcode == 1) return; /* request is invalid */
2301 * Failed proxying it (dead home servers, etc.)
2302 * Run it through Post-Proxy-Type = Fail, and
2303 * respond to the request.
2305 * Note that we're in a child thread here, so we
2306 * do NOT re-schedule the request. Instead, we
2307 * do what we would have done, which is run the
2308 * pre-handler, a NULL request handler, and then
2311 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2312 request_pre_handler(request);
2316 * Else we weren't supposed to proxy it,
2317 * OR we proxied it internally to a virutal server.
2323 * Fake requests don't get encoded or signed. The caller
2324 * also requires the reply VP's, so we don't free them
2327 if (request->packet->dst_port == 0) {
2328 /* FIXME: RDEBUG going to the next request */
2329 #ifdef HAVE_PTHREAD_H
2330 request->child_pid = NO_SUCH_CHILD_PID;
2332 request->child_state = REQUEST_DONE;
2338 * Copy Proxy-State from the request to the reply.
2340 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2341 if (vp) pairadd(&request->reply->vps, vp);
2345 * Access-Requests get delayed or cached.
2347 switch (request->packet->code) {
2348 case PW_AUTHENTICATION_REQUEST:
2349 gettimeofday(&request->next_when, NULL);
2351 if (request->reply->code == 0) {
2353 * Check if the lack of response is intentional.
2355 vp = pairfind(request->config_items,
2356 PW_RESPONSE_PACKET_TYPE);
2358 RDEBUG2("There was no response configured: rejecting request %d",
2360 request->reply->code = PW_AUTHENTICATION_REJECT;
2362 } else if (vp->vp_integer == 256) {
2363 RDEBUG2("Not responding to request %d",
2367 * Force cleanup after a long
2368 * time, so that we don't
2369 * re-process the packet.
2371 request->next_when.tv_sec += request->root->max_request_time;
2372 request->next_callback = cleanup_delay;
2373 child_state = REQUEST_CLEANUP_DELAY;
2376 request->reply->code = vp->vp_integer;
2382 * Run rejected packets through
2384 * Post-Auth-Type = Reject
2386 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2387 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2388 vp = radius_pairmake(request, &request->config_items,
2389 "Post-Auth-Type", "Reject",
2391 if (vp) rad_postauth(request);
2394 * If configured, delay Access-Reject packets.
2396 * If request->root->reject_delay = 0, we discover
2397 * that we have to send the packet now.
2399 when = request->received;
2400 when.tv_sec += request->root->reject_delay;
2402 if (timercmp(&when, &request->next_when, >)) {
2403 RDEBUG2("Delaying reject of request %d for %d seconds",
2405 request->root->reject_delay);
2406 request->next_when = when;
2407 request->next_callback = reject_delay;
2408 #ifdef HAVE_PTHREAD_H
2409 request->child_pid = NO_SUCH_CHILD_PID;
2411 request->child_state = REQUEST_REJECT_DELAY;
2417 case PW_COA_REQUEST:
2418 case PW_DISCONNECT_REQUEST:
2420 request->next_when.tv_sec += request->root->cleanup_delay;
2421 request->next_callback = cleanup_delay;
2422 child_state = REQUEST_CLEANUP_DELAY;
2425 case PW_ACCOUNTING_REQUEST:
2426 request->next_callback = NULL; /* just to be safe */
2427 child_state = REQUEST_DONE;
2431 * FIXME: Status-Server should probably not be
2434 case PW_STATUS_SERVER:
2435 request->next_callback = NULL;
2436 child_state = REQUEST_DONE;
2440 if ((request->packet->code > 1024) &&
2441 (request->packet->code < (1024 + 254 + 1))) {
2442 request->next_callback = NULL;
2443 child_state = REQUEST_DONE;
2447 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2448 request->next_callback = NULL;
2449 child_state = REQUEST_DONE;
2454 * Suppress "no reply" packets here, unless we're reading
2455 * from the "detail" file. In that case, we've got to
2456 * tell the detail file handler that the request is dead,
2457 * and it should re-send it.
2458 * If configured, encode, sign, and send.
2460 if ((request->reply->code != 0) ||
2461 (request->listener->type == RAD_LISTEN_DETAIL)) {
2462 DEBUG_PACKET(request, request->reply, 1);
2463 request->listener->send(request->listener, request);
2468 * Now that we've completely processed the request,
2469 * see if we need to originate a CoA request.
2472 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2473 if (!originated_coa_request(request)) {
2474 RDEBUG2("Do CoA Fail handler here");
2476 /* request->coa is stil set, so we can update events */
2482 * Clean up. These are no longer needed.
2484 pairfree(&request->config_items);
2486 pairfree(&request->packet->vps);
2487 request->username = NULL;
2488 request->password = NULL;
2490 pairfree(&request->reply->vps);
2493 if (request->proxy) {
2494 pairfree(&request->proxy->vps);
2496 if (request->proxy_reply) {
2497 pairfree(&request->proxy_reply->vps);
2502 * We're not tracking responses from the home
2503 * server, we can therefore free this memory in
2506 if (!request->in_proxy_hash) {
2507 rad_free(&request->proxy);
2508 rad_free(&request->proxy_reply);
2509 request->home_server = NULL;
2515 RDEBUG2("Finished request %d.", request->number);
2516 rad_assert(child_state >= 0);
2517 request->child_state = child_state;
2520 * Single threaded mode: update timers now.
2522 if (!have_children) wait_a_bit(request);
2526 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2532 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2533 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2535 switch (request->child_state) {
2536 case REQUEST_QUEUED:
2537 case REQUEST_RUNNING:
2541 radlog(L_ERR, "Discarding duplicate request from "
2542 "client %s port %d - ID: %d due to unfinished request %d",
2544 request->packet->src_port,request->packet->id,
2549 case REQUEST_PROXIED:
2551 * We're not supposed to have duplicate
2552 * accounting packets. The other states handle
2553 * duplicates fine (discard, or send duplicate
2554 * reply). But we do NOT want to retransmit an
2555 * accounting request here, because that would
2556 * involve updating the Acct-Delay-Time, and
2557 * therefore changing the packet Id, etc.
2559 * Instead, we just discard the packet. We may
2560 * eventually respond, or the client will send a
2561 * new accounting packet.
2563 * The same comments go for Status-Server, and
2564 * other packet types.
2566 * FIXME: coa: when we proxy CoA && Disconnect
2567 * packets, this logic has to be fixed.
2569 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2573 check_for_zombie_home_server(request);
2576 * If we've just discovered that the home server is
2577 * dead, send the packet to another one.
2579 if ((request->packet->dst_port != 0) &&
2580 (request->home_server->state == HOME_STATE_IS_DEAD)) {
2583 remove_from_proxy_hash(request);
2585 home = home_server_ldb(NULL, request->home_pool, request);
2587 RDEBUG2("Failed to find live home server for request %d", request->number);
2590 * Do post-request processing,
2591 * and any insertion of necessary
2594 post_proxy_fail_handler(request);
2598 request->proxy->code = request->packet->code;
2601 * Free the old packet, to force re-encoding
2603 free(request->proxy->data);
2604 request->proxy->data = NULL;
2605 request->proxy->data_len = 0;
2608 * This request failed over to a virtual
2609 * server. Push it back onto the queue
2612 if (request->home_server->server) {
2613 proxy_fallback_handler(request);
2618 * Try to proxy the request.
2620 if (!proxy_request(request)) {
2621 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2622 goto no_home_servers;
2626 * This code executes in the main server
2627 * thread, so there's no need for locking.
2629 rad_assert(request->next_callback != NULL);
2630 INSERT_EVENT(request->next_callback, request);
2631 request->next_callback = NULL;
2633 } /* else the home server is still alive */
2635 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2636 inet_ntop(request->proxy->dst_ipaddr.af,
2637 &request->proxy->dst_ipaddr.ipaddr,
2638 buffer, sizeof(buffer)),
2639 request->proxy->dst_port,
2640 request->proxy->id);
2641 request->num_proxied_requests++;
2643 DEBUG_PACKET(request, request->proxy, 1);
2644 request->proxy_listener->send(request->proxy_listener,
2649 case REQUEST_REJECT_DELAY:
2650 RDEBUG2("Waiting to send Access-Reject "
2651 "to client %s port %d - ID: %d",
2653 request->packet->src_port, request->packet->id);
2656 case REQUEST_CLEANUP_DELAY:
2658 if (request->reply->code == 0) {
2659 RDEBUG2("Ignoring retransmit from client %s port %d "
2660 "- ID: %d, no reply was configured",
2662 request->packet->src_port, request->packet->id);
2667 * FIXME: This sends duplicate replies to
2668 * accounting requests, even if Acct-Delay-Time
2669 * or Event-Timestamp is in the packet. In those
2670 * cases, the Id should be changed, and the packet
2673 RDEBUG2("Sending duplicate reply "
2674 "to client %s port %d - ID: %d",
2676 request->packet->src_port, request->packet->id);
2677 DEBUG_PACKET(request, request->reply, 1);
2678 request->listener->send(request->listener, request);
2684 static void received_conflicting_request(REQUEST *request,
2685 const RADCLIENT *client)
2687 radlog(L_ERR, "Received conflicting packet from "
2688 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2690 request->packet->src_port, request->packet->id,
2694 * Nuke it from the request hash, so we can receive new
2697 remove_from_request_hash(request);
2699 switch (request->child_state) {
2700 #ifdef HAVE_PTHREAD_H
2702 * It's queued or running. Tell it to stop, and
2703 * wait for it to do so.
2705 case REQUEST_QUEUED:
2706 case REQUEST_RUNNING:
2707 request->master_state = REQUEST_STOP_PROCESSING;
2708 request->delay += request->delay >> 1;
2710 tv_add(&request->when, request->delay);
2712 INSERT_EVENT(wait_for_child_to_die, request);
2717 * It's in some other state, and therefore also
2718 * in the event queue. At some point, the
2719 * child will notice, and we can then delete it.
2722 rad_assert(request->ev != NULL);
2728 static int can_handle_new_request(RADIUS_PACKET *packet,
2730 struct main_config_t *root)
2733 * Count the total number of requests, to see if
2734 * there are too many. If so, return with an
2737 if (root->max_requests) {
2738 int request_count = fr_packet_list_num_elements(pl);
2741 * This is a new request. Let's see if
2742 * it makes us go over our configured
2745 if (request_count > root->max_requests) {
2746 radlog(L_ERR, "Dropping request (%d is too many): "
2747 "from client %s port %d - ID: %d", request_count,
2749 packet->src_port, packet->id);
2750 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2751 "\tThe value for 'max_requests' is probably set too low.\n");
2753 } /* else there were a small number of requests */
2754 } /* else there was no configured limit for requests */
2757 * FIXME: Add per-client checks. If one client is sending
2758 * too many packets, start discarding them.
2760 * We increment the counters here, and decrement them
2761 * when the response is sent... somewhere in this file.
2765 * FUTURE: Add checks for system load. If the system is
2766 * busy, start dropping requests...
2768 * We can probably keep some statistics ourselves... if
2769 * there are more requests coming in than we can handle,
2770 * start dropping some.
2777 int received_request(rad_listen_t *listener,
2778 RADIUS_PACKET *packet, REQUEST **prequest,
2781 RADIUS_PACKET **packet_p;
2782 REQUEST *request = NULL;
2783 struct main_config_t *root = &mainconfig;
2785 packet_p = fr_packet_list_find(pl, packet);
2787 request = fr_packet2myptr(REQUEST, packet, packet_p);
2788 rad_assert(request->in_request_hash);
2790 if ((request->packet->data_len == packet->data_len) &&
2791 (memcmp(request->packet->vector, packet->vector,
2792 sizeof(packet->vector)) == 0)) {
2793 received_retransmit(request, client);
2798 * The new request is different from the old one,
2799 * but maybe the old is finished. If so, delete
2802 switch (request->child_state) {
2803 struct timeval when;
2807 * Special hacks for race conditions.
2808 * The reply is encoded, and therefore
2809 * likely sent. We received a *new*
2810 * packet from the client, likely before
2811 * the next line or two of code which
2812 * updated the child state. In this
2813 * case, just accept the new request.
2815 if ((request->reply->code != 0) &&
2816 request->reply->data) {
2817 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2819 packet->src_port, packet->id,
2821 remove_from_request_hash(request);
2826 gettimeofday(&when, NULL);
2830 * If the cached request was received
2831 * within the last second, then we
2832 * discard the NEW request instead of the
2833 * old one. This will happen ONLY when
2834 * the client is severely broken, and is
2835 * sending conflicting packets very
2838 if (timercmp(&when, &request->received, <)) {
2839 radlog(L_ERR, "Discarding conflicting packet from "
2840 "client %s port %d - ID: %d due to recent request %d.",
2842 packet->src_port, packet->id,
2847 received_conflicting_request(request, client);
2851 case REQUEST_REJECT_DELAY:
2852 case REQUEST_CLEANUP_DELAY:
2853 request->child_state = REQUEST_DONE;
2855 cleanup_delay(request);
2862 * We may want to quench the new request.
2864 if ((listener->type != RAD_LISTEN_DETAIL) &&
2865 !can_handle_new_request(packet, client, root)) {
2870 * Create and initialize the new request.
2872 request = request_alloc(); /* never fails */
2874 if ((request->reply = rad_alloc(0)) == NULL) {
2875 radlog(L_ERR, "No memory");
2879 request->listener = listener;
2880 request->client = client;
2881 request->packet = packet;
2882 request->packet->timestamp = request->timestamp;
2883 request->number = request_num_counter++;
2884 request->priority = listener->type;
2885 #ifdef HAVE_PTHREAD_H
2886 request->child_pid = NO_SUCH_CHILD_PID;
2890 * Status-Server packets go to the head of the queue.
2892 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2895 * Set virtual server identity
2897 if (client->server) {
2898 request->server = client->server;
2899 } else if (listener->server) {
2900 request->server = listener->server;
2902 request->server = NULL;
2906 * Remember the request in the list.
2908 if (!fr_packet_list_insert(pl, &request->packet)) {
2909 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2910 ev_request_free(&request);
2914 request->in_request_hash = TRUE;
2915 request->root = root;
2919 * The request passes many of our sanity checks.
2920 * From here on in, if anything goes wrong, we
2921 * send a reject message, instead of dropping the
2926 * Build the reply template from the request.
2929 request->reply->sockfd = request->packet->sockfd;
2930 request->reply->dst_ipaddr = request->packet->src_ipaddr;
2931 request->reply->src_ipaddr = request->packet->dst_ipaddr;
2932 request->reply->dst_port = request->packet->src_port;
2933 request->reply->src_port = request->packet->dst_port;
2934 request->reply->id = request->packet->id;
2935 request->reply->code = 0; /* UNKNOWN code */
2936 memcpy(request->reply->vector, request->packet->vector,
2937 sizeof(request->reply->vector));
2938 request->reply->vps = NULL;
2939 request->reply->data = NULL;
2940 request->reply->data_len = 0;
2942 request->master_state = REQUEST_ACTIVE;
2943 request->child_state = REQUEST_QUEUED;
2944 request->next_callback = NULL;
2946 gettimeofday(&request->received, NULL);
2947 request->timestamp = request->received.tv_sec;
2948 request->when = request->received;
2950 request->delay = USEC;
2952 tv_add(&request->when, request->delay);
2954 INSERT_EVENT(wait_a_bit, request);
2956 *prequest = request;
2962 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2968 * Also removes from the proxy hash if responses == requests
2970 request = lookup_in_proxy_hash(packet);
2973 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2974 inet_ntop(packet->src_ipaddr.af,
2975 &packet->src_ipaddr.ipaddr,
2976 buffer, sizeof(buffer)),
2977 packet->src_port, packet->id);
2982 * We haven't replied to the NAS, but we have seen an
2983 * earlier reply from the home server. Ignore this packet,
2984 * as we're likely still processing the previous reply.
2986 if (request->proxy_reply) {
2987 if (memcmp(request->proxy_reply->vector,
2989 sizeof(request->proxy_reply->vector)) == 0) {
2990 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
2991 inet_ntop(packet->src_ipaddr.af,
2992 &packet->src_ipaddr.ipaddr,
2993 buffer, sizeof(buffer)),
2994 packet->src_port, packet->id,
2998 * ? The home server gave us a new proxy
2999 * reply which doesn't match the old
3002 RDEBUG2("Ignoring conflicting proxy reply");
3005 /* assert that there's an event queued for request? */
3010 * Verify the packet before doing ANYTHING with it. This
3011 * means we're doing more MD5 checks in the server core.
3012 * However, we can fix that by moving to multiple threads
3013 * listening on sockets.
3015 * We do this AFTER looking the request up in the hash,
3016 * and AFTER vhecking if we saw a previous request. This
3017 * helps minimize the DoS effect of people attacking us
3018 * with spoofed packets.
3020 if (rad_verify(packet, request->proxy,
3021 request->home_server->secret) != 0) {
3022 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
3026 gettimeofday(&now, NULL);
3029 * Maybe move this earlier in the decision process?
3030 * Having it here means that late or duplicate proxy
3031 * replies no longer get the home server marked as
3032 * "alive". This might be good for stability, though.
3034 * FIXME: Do we really want to do this whenever we
3035 * receive a packet? Setting this here means that we
3036 * mark it alive on *any* packet, even if it's lost all
3037 * of the *other* packets in the last 10s.
3039 request->home_server->state = HOME_STATE_ALIVE;
3043 * When originating CoA, the "proxy" reply is the reply
3044 * to the CoA request that we originated. At this point,
3045 * the original request is finished, and it has a reply.
3047 * However, if we haven't separated the two requests, do
3048 * so now. This is done so that cleaning up the original
3049 * request won't cause the CoA request to be free'd. See
3050 * util.c, request_free()
3052 if (request->parent && (request->parent->coa == request)) {
3053 request->parent->coa = NULL;
3054 request->parent = NULL;
3058 * Skip the next set of checks, as the original
3059 * reply is cached. We want to be able to still
3060 * process the CoA reply, AND to reference the
3061 * original request/reply.
3063 * This is getting to be really quite a bit of a
3069 * If there's a reply to the NAS, ignore everything
3070 * related to proxy responses
3072 if (request->reply && request->reply->code != 0) {
3073 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3079 * The average includes our time to receive packets and
3080 * look them up in the hashes, which should be the same
3083 * We update the response time only for the FIRST packet
3086 if (request->home_server->ema.window > 0) {
3087 radius_stats_ema(&request->home_server->ema,
3088 &now, &request->proxy_when);
3092 switch (request->child_state) {
3093 case REQUEST_QUEUED:
3094 case REQUEST_RUNNING:
3095 radlog(L_ERR, "Internal sanity check failed for child state");
3098 case REQUEST_REJECT_DELAY:
3099 case REQUEST_CLEANUP_DELAY:
3101 radlog(L_ERR, "Reply from home server %s port %d - ID: %d arrived too late for request %d. Try increasing 'retry_delay' or 'max_request_time'",
3102 inet_ntop(packet->src_ipaddr.af,
3103 &packet->src_ipaddr.ipaddr,
3104 buffer, sizeof(buffer)),
3105 packet->src_port, packet->id,
3107 /* assert that there's an event queued for request? */
3110 case REQUEST_PROXIED:
3114 request->proxy_reply = packet;
3118 * Perform RTT calculations, as per RFC 2988 (for TCP).
3119 * Note that we only do so on the first response.
3121 if ((request->num_proxied_responses == 1)
3123 home_server *home = request->home_server;
3125 rtt = now.tv_sec - request->proxy_when.tv_sec;
3128 rtt -= request->proxy_when.tv_usec;
3130 if (!home->has_rtt) {
3131 home->has_rtt = TRUE;
3134 home->rttvar = rtt / 2;
3137 home->rttvar -= home->rttvar >> 2;
3138 home->rttvar += (home->srtt - rtt);
3139 home->srtt -= home->srtt >> 3;
3140 home->srtt += rtt >> 3;
3143 home->rto = home->srtt;
3144 if (home->rttvar > (USEC / 4)) {
3145 home->rto += home->rttvar * 4;
3153 * There's no incoming request, so it's a proxied packet
3156 if (!request->packet) {
3157 received_response_to_ping(request);
3158 request->proxy_reply = NULL; /* caller will free it */
3159 ev_request_free(&request);
3163 request->child_state = REQUEST_QUEUED;
3164 request->when = now;
3165 request->delay = USEC;
3166 request->priority = RAD_LISTEN_PROXY;
3167 tv_add(&request->when, request->delay);
3170 * Wait a bit will take care of max_request_time
3172 INSERT_EVENT(wait_a_bit, request);
3178 void event_new_fd(rad_listen_t *this)
3182 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3184 this->print(this, buffer, sizeof(buffer));
3186 if (this->status == RAD_LISTEN_STATUS_INIT) {
3188 DEBUG("Listening on %s", buffer);
3190 DEBUG2(" ... adding new socket %s", buffer);
3192 if (!fr_event_fd_insert(el, 0, this->fd,
3193 event_socket_handler, this)) {
3194 radlog(L_ERR, "Failed remembering handle for proxy socket!");
3198 this->status = RAD_LISTEN_STATUS_KNOWN;
3202 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3203 DEBUG2(" ... closing socket %s", buffer);
3205 fr_event_fd_delete(el, 0, this->fd);
3206 this->status = RAD_LISTEN_STATUS_FINISH;
3209 * Close the fd AFTER fixing up the requests and
3210 * listeners, so that they don't send/recv on the
3211 * wrong socket (if someone manages to open
3219 static void handle_signal_self(int flag)
3221 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3222 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3223 fr_event_loop_exit(el, 1);
3225 fr_event_loop_exit(el, 2);
3229 } /* else exit/term flags weren't set */
3232 * Tell the even loop to stop processing.
3234 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3236 static time_t last_hup = 0;
3238 DEBUG("Received HUP signal.");
3241 if ((int) (when - last_hup) < 5) {
3242 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3247 fr_event_loop_exit(el, 0x80);
3251 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3255 * FIXME: O(N) loops suck.
3257 for (this = mainconfig.listen;
3259 this = this->next) {
3260 if (this->type != RAD_LISTEN_DETAIL) continue;
3263 * This one didn't send the signal, skip
3266 if (!this->decode(this, NULL)) continue;
3269 * Go service the interrupt.
3271 event_poll_detail(this);
3276 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3279 for (this = mainconfig.listen;
3281 this = this->next) {
3287 #ifndef WITH_SELF_PIPE
3288 void radius_signal_self(int flag)
3290 handle_signal_self(flag);
3294 * Inform ourselves that we received a signal.
3296 void radius_signal_self(int flag)
3302 * The read MUST be non-blocking for this to work.
3304 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3308 for (i = 0; i < rcode; i++) {
3309 buffer[0] |= buffer[i];
3317 write(self_pipe[1], buffer, 1);
3321 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3322 UNUSED int fd, UNUSED void *ctx)
3327 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3328 if (rcode <= 0) return;
3331 * Merge pending signals.
3333 for (i = 0; i < rcode; i++) {
3334 buffer[0] |= buffer[i];
3337 handle_signal_self(buffer[0]);
3342 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3345 rad_listen_t *listener = ctx;
3346 RAD_REQUEST_FUNP fun;
3349 rad_assert(xel == el);
3353 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3355 if (!listener->recv(listener, &fun, &request)) return;
3357 if (!thread_pool_addrequest(request, fun)) {
3358 request->child_state = REQUEST_DONE;
3362 typedef struct listen_detail_t {
3367 * This function is called periodically to see if this detail
3368 * file is available for reading.
3370 static void event_poll_detail(void *ctx)
3373 RAD_REQUEST_FUNP fun;
3375 rad_listen_t *this = ctx;
3376 struct timeval when;
3377 listen_detail_t *detail = this->data;
3379 rad_assert(this->type == RAD_LISTEN_DETAIL);
3382 * Try to read something.
3384 * FIXME: This does poll AND receive.
3386 rcode = this->recv(this, &fun, &request);
3388 rad_assert(fun != NULL);
3389 rad_assert(request != NULL);
3391 if (!thread_pool_addrequest(request, fun)) {
3392 request->child_state = REQUEST_DONE;
3396 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3400 * Backdoor API to get the delay until the next poll
3403 delay = this->encode(this, NULL);
3404 tv_add(&when, delay);
3406 if (!fr_event_insert(el, event_poll_detail, this,
3407 &when, &detail->ev)) {
3408 radlog(L_ERR, "Failed creating handler");
3414 static void event_status(struct timeval *wake)
3416 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3420 if (debug_flag == 0) {
3422 radlog(L_INFO, "Ready to process requests.");
3423 just_started = FALSE;
3429 DEBUG("Ready to process requests.");
3431 } else if ((wake->tv_sec != 0) ||
3432 (wake->tv_usec >= 100000)) {
3433 DEBUG("Waking up in %d.%01u seconds.",
3434 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3439 * FIXME: Put this somewhere else, where it isn't called
3440 * all of the time...
3443 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3445 * If there are no child threads, then there may
3446 * be child processes. In that case, wait for
3447 * their exit status, and throw that exit status
3448 * away. This helps get rid of zxombie children.
3450 while (waitpid(-1, &argval, WNOHANG) > 0) {
3458 * Externally-visibly functions.
3460 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3462 rad_listen_t *this, *head = NULL;
3466 time(&fr_start_time);
3468 el = fr_event_list_create(event_status);
3471 pl = fr_packet_list_create(0);
3472 if (!pl) return 0; /* leak el */
3474 request_num_counter = 0;
3477 * Move all of the thread calls to this file?
3479 * It may be best for the mutexes to be in this file...
3481 have_children = spawn_flag;
3484 if (mainconfig.proxy_requests) {
3485 pthread_mutexattr_t attr;
3488 * Create the tree for managing proxied requests and
3491 proxy_list = fr_packet_list_create(1);
3492 if (!proxy_list) return 0;
3494 #ifdef HAVE_PTHREAD_H
3495 pthread_mutexattr_init(&attr);
3497 #ifdef PTHREAD_MUTEX_RECURSIVE
3498 if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) < 0) {
3499 radlog(L_ERR, "FATAL: Failed to set type for proxy mutex: %s",
3505 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3506 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3511 pthread_mutexattr_destroy(&attr);
3517 * Just before we spawn the child threads, force the log
3518 * subsystem to re-open the log file for every write.
3520 if (spawn_flag) force_log_reopen();
3522 #ifdef HAVE_PTHREAD_H
3524 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3526 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3528 if (thread_pool_init(cs, spawn_flag) < 0) {
3534 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3539 #ifdef WITH_SELF_PIPE
3541 * Child threads need a pipe to signal us, as do the
3544 if (pipe(self_pipe) < 0) {
3545 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3549 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3550 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3554 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3555 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3560 if (!fr_event_fd_insert(el, 0, self_pipe[0],
3561 event_signal_handler, el)) {
3562 radlog(L_ERR, "Failed creating handler for signals");
3565 #endif /* WITH_SELF_PIPE */
3569 * Mark the proxy Fd's as unused.
3574 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3578 DEBUG("%s: #### Opening IP addresses and Ports ####",
3582 * The server temporarily switches to an unprivileged
3583 * user very early in the bootstrapping process.
3584 * However, some sockets MAY require privileged access
3585 * (bind to device, or to port < 1024, or to raw
3586 * sockets). Those sockets need to call suid up/down
3587 * themselves around the functions that need a privileged
3590 if (listen_init(cs, &head) < 0) {
3595 * At this point, no one has any business *ever* going
3598 fr_suid_down_permanent();
3601 * Add all of the sockets to the event loop.
3605 this = this->next) {
3608 this->print(this, buffer, sizeof(buffer));
3610 switch (this->type) {
3612 case RAD_LISTEN_DETAIL:
3613 DEBUG("Listening on %s", buffer);
3616 * Detail files are always known, and aren't
3617 * put into the socket event loop.
3619 this->status = RAD_LISTEN_STATUS_KNOWN;
3622 * Set up the first poll interval.
3624 event_poll_detail(this);
3629 case RAD_LISTEN_PROXY:
3630 rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3631 rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3633 proxy_fds[this->fd & 0x1f] = this->fd;
3634 proxy_listeners[this->fd & 0x1f] = this;
3635 if (!fr_packet_list_socket_add(proxy_list,
3649 mainconfig.listen = head;
3655 static int request_hash_cb(UNUSED void *ctx, void *data)
3657 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3660 rad_assert(request->in_proxy_hash == FALSE);
3663 ev_request_free(&request);
3670 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3672 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3674 ev_request_free(&request);
3680 void radius_event_free(void)
3683 * FIXME: Stop all threads, or at least check that
3684 * they're all waiting on the semaphore, and the queues
3690 * There are requests in the proxy hash that aren't
3691 * referenced from anywhere else. Remove them first.
3694 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3695 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3696 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3697 fr_packet_list_free(proxy_list);
3702 fr_packet_list_walk(pl, NULL, request_hash_cb);
3704 fr_packet_list_free(pl);
3707 fr_event_list_free(el);
3710 int radius_event_process(void)
3714 return fr_event_loop(el);
3717 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3719 request->options = RAD_REQUEST_OPTION_DEBUG2;
3721 if (request_pre_handler(request)) {
3722 rad_assert(fun != NULL);
3723 rad_assert(request != NULL);
3725 if (request->server) RDEBUG("server %s {",
3726 request->server != NULL ?
3727 request->server : "");
3730 if (request->server) RDEBUG("} # server %s",
3731 request->server != NULL ?
3732 request->server : "");
3734 request_post_handler(request);
3737 DEBUG2("Going to the next request");