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();
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->when.tv_sec += request->home_server->coa_mrd;
442 request->when.tv_sec += request->home_server->response_window;
444 if ((request->num_proxied_requests == request->num_proxied_responses) ||
445 timercmp(&now, &request->when, >)) {
446 if (request->packet) {
447 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
448 request->number, request->packet->id,
449 (unsigned int) (request->timestamp - fr_start_time));
451 RDEBUG2("Cleaning up request %d with timestamp +%d",
453 (unsigned int) (request->timestamp - fr_start_time));
456 ev_request_free(&request);
460 INSERT_EVENT(wait_for_proxy_id_to_expire, request);
464 #ifdef HAVE_PTHREAD_H
465 static void wait_for_child_to_die(void *ctx)
467 REQUEST *request = ctx;
469 rad_assert(request->magic == REQUEST_MAGIC);
471 if ((request->child_state == REQUEST_QUEUED) |
472 (request->child_state == REQUEST_RUNNING)) {
473 request->delay += (request->delay >> 1);
474 tv_add(&request->when, request->delay);
476 RDEBUG2("Child is still stuck for request %d", request->number);
478 INSERT_EVENT(wait_for_child_to_die, request);
482 RDEBUG2("Child is finally responsive for request %d", request->number);
483 remove_from_request_hash(request);
486 if (request->proxy) {
487 wait_for_proxy_id_to_expire(request);
492 ev_request_free(&request);
496 static void cleanup_delay(void *ctx)
498 REQUEST *request = ctx;
500 rad_assert(request->magic == REQUEST_MAGIC);
501 rad_assert((request->child_state == REQUEST_CLEANUP_DELAY) ||
502 (request->child_state == REQUEST_DONE));
504 remove_from_request_hash(request);
507 if (request->proxy && request->in_proxy_hash) {
508 wait_for_proxy_id_to_expire(request);
513 RDEBUG2("Cleaning up request %d ID %d with timestamp +%d",
514 request->number, request->packet->id,
515 (unsigned int) (request->timestamp - fr_start_time));
517 ev_request_free(&request);
522 * FIXME: Put into a libradius function.
524 #define MAX_PACKET_CODE (52)
525 static const char *packet_codes[] = {
530 "Accounting-Request",
531 "Accounting-Response",
536 "Accounting-Message",
547 "Resource-Free-Request",
548 "Resource-Free-Response",
549 "Resource-Query-Request",
550 "Resource-Query-Response",
551 "Alternate-Resource-Reclaim-Request",
552 "NAS-Reboot-Request",
553 "NAS-Reboot-Response",
566 "Disconnect-Request",
576 "IP-Address-Allocate",
582 * In daemon mode, AND this request has debug flags set.
584 #define DEBUG_PACKET if (!debug_flag && request->options && request->radlog) debug_packet
586 static void debug_packet(REQUEST *request, RADIUS_PACKET *packet, int direction)
590 const char *received, *from;
591 const fr_ipaddr_t *ip;
596 rad_assert(debug_flag != 0);
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 if (rad_verify(request->proxy_reply, request->proxy,
710 request->home_server->secret) != 0) {
711 DEBUG("Ignoring spoofed proxy reply. Signature is invalid");
715 home = request->home_server;
716 home->num_received_pings++;
718 RDEBUG2("Received response to status check %d (%d in current sequence)",
719 request->number, home->num_received_pings);
722 * Remove the request from any hashes
724 fr_event_delete(el, &request->ev);
725 remove_from_proxy_hash(request);
726 rad_assert(request->in_request_hash == FALSE);
729 * The control socket may have marked the home server as
730 * alive. OR, it may have suddenly started responding to
731 * requests again. If so, don't re-do the "make alive"
734 if (home->state == HOME_STATE_ALIVE) return;
737 * We haven't received enough ping responses to mark it
738 * "alive". Wait a bit.
740 if (home->num_received_pings < home->num_pings_to_alive) {
744 home->state = HOME_STATE_ALIVE;
745 home->currently_outstanding = 0;
746 home->revive_time = now;
748 if (!fr_event_delete(el, &home->ev)) {
749 RDEBUG2("Hmm... no event for home server. Oh well.");
752 radlog(L_INFO, "PROXY: Marking home server %s port %d alive",
753 inet_ntop(request->proxy->dst_ipaddr.af,
754 &request->proxy->dst_ipaddr.ipaddr,
755 buffer, sizeof(buffer)),
756 request->proxy->dst_port);
761 * Called from start of zombie period, OR after control socket
762 * marks the home server dead.
764 static void ping_home_server(void *ctx)
767 home_server *home = ctx;
771 if (home->state == HOME_STATE_ALIVE) {
772 radlog(L_INFO, "Suspicious proxy state... continuing");
776 request = request_alloc();
777 request->number = request_num_counter++;
779 request->proxy = rad_alloc(1);
780 rad_assert(request->proxy != NULL);
782 fr_event_now(el, &request->when);
783 home->when = request->when;
785 if (home->ping_check == HOME_PING_CHECK_STATUS_SERVER) {
786 request->proxy->code = PW_STATUS_SERVER;
788 radius_pairmake(request, &request->proxy->vps,
789 "Message-Authenticator", "0x00", T_OP_SET);
791 } else if (home->type == HOME_TYPE_AUTH) {
792 request->proxy->code = PW_AUTHENTICATION_REQUEST;
794 radius_pairmake(request, &request->proxy->vps,
795 "User-Name", home->ping_user_name, T_OP_SET);
796 radius_pairmake(request, &request->proxy->vps,
797 "User-Password", home->ping_user_password, T_OP_SET);
798 radius_pairmake(request, &request->proxy->vps,
799 "Service-Type", "Authenticate-Only", T_OP_SET);
800 radius_pairmake(request, &request->proxy->vps,
801 "Message-Authenticator", "0x00", T_OP_SET);
804 #ifdef WITH_ACCOUNTING
805 request->proxy->code = PW_ACCOUNTING_REQUEST;
807 radius_pairmake(request, &request->proxy->vps,
808 "User-Name", home->ping_user_name, T_OP_SET);
809 radius_pairmake(request, &request->proxy->vps,
810 "Acct-Status-Type", "Stop", T_OP_SET);
811 radius_pairmake(request, &request->proxy->vps,
812 "Acct-Session-Id", "00000000", T_OP_SET);
813 vp = radius_pairmake(request, &request->proxy->vps,
814 "Event-Timestamp", "0", T_OP_SET);
815 vp->vp_date = now.tv_sec;
817 rad_assert("Internal sanity check failed");
821 radius_pairmake(request, &request->proxy->vps,
822 "NAS-Identifier", "Status Check. Are you alive?",
825 request->proxy->dst_ipaddr = home->ipaddr;
826 request->proxy->dst_port = home->port;
827 request->home_server = home;
829 rad_assert(request->proxy_listener == NULL);
831 if (!insert_into_proxy_hash(request, FALSE)) {
832 RDEBUG2("ERROR: Failed inserting status check %d into proxy hash. Discarding it.",
834 ev_request_free(&request);
837 rad_assert(request->proxy_listener != NULL);
838 request->proxy_listener->send(request->proxy_listener,
841 request->next_callback = NULL;
842 request->child_state = REQUEST_PROXIED;
843 request->when.tv_sec += home->ping_timeout;;
845 INSERT_EVENT(no_response_to_ping, request);
848 * Add +/- 2s of jitter, as suggested in RFC 3539
849 * and in the Issues and Fixes draft.
851 home->when.tv_sec += home->ping_interval - 2;
854 jitter ^= (jitter >> 10);
855 jitter &= ((1 << 23) - 1); /* 22 bits of 1 */
857 tv_add(&home->when, jitter);
859 INSERT_EVENT(ping_home_server, home);
863 void mark_home_server_dead(home_server *home, struct timeval *when)
865 int previous_state = home->state;
868 radlog(L_INFO, "PROXY: Marking home server %s port %d as dead.",
869 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
870 buffer, sizeof(buffer)),
873 home->state = HOME_STATE_IS_DEAD;
874 home->num_received_pings = 0;
876 if (home->ping_check != HOME_PING_CHECK_NONE) {
878 * If the control socket marks us dead, start
879 * pinging. Otherwise, we already started
880 * pinging when it was marked "zombie".
882 if (previous_state == HOME_STATE_ALIVE) {
883 ping_home_server(home);
888 * Revive it after a fixed period of time. This
889 * is very, very, bad.
892 home->when.tv_sec += home->revive_interval;
894 INSERT_EVENT(revive_home_server, home);
898 static void check_for_zombie_home_server(REQUEST *request)
903 home = request->home_server;
905 if (home->state != HOME_STATE_ZOMBIE) return;
907 when = home->zombie_period_start;
908 when.tv_sec += home->zombie_period;
910 fr_event_now(el, &now);
911 if (timercmp(&now, &when, <)) {
915 mark_home_server_dead(home, &request->when);
918 static int proxy_to_virtual_server(REQUEST *request);
920 static int virtual_server_handler(UNUSED REQUEST *request)
922 proxy_to_virtual_server(request);
926 static void proxy_fallback_handler(REQUEST *request)
929 * A proper time is required for wait_a_bit.
931 request->delay = USEC / 10;
932 gettimeofday(&now, NULL);
933 request->next_when = now;
934 tv_add(&request->next_when, request->delay);
935 request->next_callback = wait_a_bit;
938 * Re-queue the request.
940 request->child_state = REQUEST_QUEUED;
942 rad_assert(request->proxy != NULL);
943 if (!thread_pool_addrequest(request, virtual_server_handler)) {
944 request->child_state = REQUEST_DONE;
947 #ifdef HAVE_PTHREAD_H
949 * MAY free the request if we're over max_request_time,
950 * AND we're not in threaded mode!
952 * Note that we call this ONLY if we're threaded, as
953 * if we're NOT threaded, request_post_handler() calls
954 * wait_a_bit(), which means that "request" may not
957 if (have_children) wait_a_bit(request);
962 static int setup_post_proxy_fail(REQUEST *request)
964 DICT_VALUE *dval = NULL;
967 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
968 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Authentication");
970 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
971 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Accounting");
975 * See no_response_to_coa_request
977 } else if (((request->packet->code >> 8) & 0xff) == PW_COA_REQUEST) {
978 request->packet->code &= 0xff; /* restore it */
980 if (request->proxy->code == PW_COA_REQUEST) {
981 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-CoA");
983 } else if (request->proxy->code == PW_DISCONNECT_REQUEST) {
984 dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail-Disconnect");
994 if (!dval) dval = dict_valbyname(PW_POST_PROXY_TYPE, "Fail");
997 pairdelete(&request->config_items, PW_POST_PROXY_TYPE);
1001 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1002 if (!vp) vp = radius_paircreate(request, &request->config_items,
1003 PW_POST_PROXY_TYPE, PW_TYPE_INTEGER);
1004 vp->vp_integer = dval->value;
1006 rad_assert(request->proxy_reply == NULL);
1012 static int null_handler(UNUSED REQUEST *request)
1017 static void post_proxy_fail_handler(REQUEST *request)
1020 * A proper time is required for wait_a_bit.
1022 request->delay = USEC / 10;
1023 gettimeofday(&now, NULL);
1026 * Not set up to run Post-Proxy-Type = Fail.
1028 * Mark the request as still running, and figure out what
1031 if (!setup_post_proxy_fail(request)) {
1032 request->child_state = REQUEST_RUNNING;
1033 request_post_handler(request);
1037 * Re-queue the request.
1039 request->child_state = REQUEST_QUEUED;
1042 * There is a post-proxy-type of fail. We run
1043 * the request through the pre/post proxy
1044 * handlers, just like it was a real proxied
1045 * request. However, we set the per-request
1046 * handler to NULL, as we don't want to do
1049 * Note that when we're not threaded, this will
1050 * process the request even if it's greater than
1051 * max_request_time. That's not fatal.
1053 request->priority = 0;
1054 rad_assert(request->proxy != NULL);
1055 thread_pool_addrequest(request, null_handler);
1059 * MAY free the request if we're over max_request_time,
1060 * AND we're not in threaded mode!
1062 * Note that we call this ONLY if we're threaded, as
1063 * if we're NOT threaded, request_post_handler() calls
1064 * wait_a_bit(), which means that "request" may not
1067 if (have_children) wait_a_bit(request);
1071 /* maybe check this against wait_for_proxy_id_to_expire? */
1072 static void no_response_to_proxied_request(void *ctx)
1074 REQUEST *request = ctx;
1078 rad_assert(request->magic == REQUEST_MAGIC);
1079 rad_assert(request->child_state == REQUEST_PROXIED);
1082 * If we've failed over to an internal home server,
1083 * replace the callback with the correct one. This
1084 * is due to locking issues with child threads...
1086 if (request->home_server->server) {
1087 wait_a_bit(request);
1091 radlog(L_ERR, "Rejecting request %d due to lack of any response from home server %s port %d",
1093 inet_ntop(request->proxy->dst_ipaddr.af,
1094 &request->proxy->dst_ipaddr.ipaddr,
1095 buffer, sizeof(buffer)),
1096 request->proxy->dst_port);
1098 check_for_zombie_home_server(request);
1100 home = request->home_server;
1102 post_proxy_fail_handler(request);
1105 * Don't touch request due to race conditions
1107 if (home->state == HOME_STATE_IS_DEAD) {
1108 rad_assert(home->ev != NULL); /* or it will never wake up */
1113 * Enable the zombie period when we notice that the home
1114 * server hasn't responded. We do NOT back-date the start
1115 * of the zombie period.
1117 if (home->state == HOME_STATE_ALIVE) {
1118 radlog(L_ERR, "PROXY: Marking home server %s port %d as zombie (it looks like it is dead).",
1119 inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr,
1120 buffer, sizeof(buffer)),
1122 home->state = HOME_STATE_ZOMBIE;
1123 home->zombie_period_start = now;
1126 * Start pinging the home server.
1128 ping_home_server(home);
1133 static void wait_a_bit(void *ctx)
1135 struct timeval when;
1136 REQUEST *request = ctx;
1137 fr_event_callback_t callback = NULL;
1139 rad_assert(request->magic == REQUEST_MAGIC);
1143 * The CoA request is a new (internally generated)
1144 * request, created in a child thread. We therefore need
1145 * some way to tie its events back into the main event
1148 if (request->coa && !request->coa->proxy_reply &&
1149 request->coa->next_callback) {
1150 request->coa->when = request->coa->next_when;
1151 INSERT_EVENT(request->coa->next_callback, request->coa);
1152 request->coa->next_callback = NULL;
1153 request->coa->parent = NULL;
1154 request->coa = NULL;
1158 switch (request->child_state) {
1159 case REQUEST_QUEUED:
1160 case REQUEST_RUNNING:
1161 when = request->received;
1162 when.tv_sec += request->root->max_request_time;
1165 * Normally called from the event loop with the
1166 * proper event loop time. Otherwise, called from
1167 * post proxy fail handler, which sets "now", and
1168 * this call won't re-set it, because we're not
1169 * in the event loop.
1171 fr_event_now(el, &now);
1174 * Request still has more time. Continue
1177 if (timercmp(&now, &when, <) ||
1178 ((request->listener->type == RAD_LISTEN_DETAIL) &&
1179 (request->child_state == REQUEST_QUEUED))) {
1180 if (request->delay < (USEC / 10)) {
1181 request->delay = USEC / 10;
1183 request->delay += request->delay >> 1;
1187 * Cap wait at some sane value for detail
1190 if ((request->listener->type == RAD_LISTEN_DETAIL) &&
1191 (request->delay > (request->root->max_request_time * USEC))) {
1192 request->delay = request->root->max_request_time * USEC;
1196 request->when = now;
1197 tv_add(&request->when, request->delay);
1198 callback = wait_a_bit;
1202 #if defined(HAVE_PTHREAD_H)
1204 * A child thread MAY still be running on the
1205 * request. Ask the thread to stop working on
1208 if (have_children) {
1209 /* FIXME: kill unresponsive children? */
1212 * Print this error message ONLY if
1213 * there's a child currently processing
1214 * the request. As we don't have thread
1215 * locks here, there may be race
1216 * conditions on this check. But it's
1217 * just an error message, so that's OK.
1219 if (!pthread_equal(request->child_pid, NO_SUCH_CHILD_PID)) {
1220 radlog(L_ERR, "WARNING: Unresponsive child for request %d, in module %s component %s",
1222 request->module ? request->module : "<server core>",
1223 request->component ? request->component : "<server core>");
1226 request->master_state = REQUEST_STOP_PROCESSING;
1228 request->delay = USEC / 4;
1229 tv_add(&request->when, request->delay);
1230 callback = wait_for_child_to_die;
1236 * Else there are no child threads. We probably
1237 * should have just marked the request as 'done'
1238 * elsewhere, like in the post-proxy-fail
1239 * handler. But doing that would involve
1240 * checking for max_request_time in multiple
1241 * places, so this may be simplest.
1243 request->child_state = REQUEST_DONE;
1247 * Mark the request as no longer running,
1251 #ifdef HAVE_PTHREAD_H
1252 request->child_pid = NO_SUCH_CHILD_PID;
1257 * This is a CoA request. It's been divorced
1258 * from everything else, so we clean it up now.
1260 if (!request->in_request_hash &&
1262 (request->packet->code != request->proxy->code) &&
1263 ((request->proxy->code == PW_COA_REQUEST) ||
1264 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
1266 * FIXME: Do CoA MIBs
1268 ev_request_free(&request);
1272 request_stats_final(request);
1273 cleanup_delay(request);
1276 case REQUEST_REJECT_DELAY:
1277 case REQUEST_CLEANUP_DELAY:
1278 #ifdef HAVE_PTHREAD_H
1279 request->child_pid = NO_SUCH_CHILD_PID;
1281 request_stats_final(request);
1283 case REQUEST_PROXIED:
1284 rad_assert(request->next_callback != NULL);
1285 rad_assert(request->next_callback != wait_a_bit);
1287 request->when = request->next_when;
1288 callback = request->next_callback;
1289 request->next_callback = NULL;
1293 rad_panic("Internal sanity check failure");
1298 * Something major went wrong. Discard the request, and
1301 * FIXME: No idea why this happens or how to fix it...
1302 * It seems to happen *only* when requests are proxied,
1303 * and where the home server doesn't respond. So it looks
1304 * like a race condition above, but it happens in debug
1305 * mode, with no threads...
1308 RDEBUG("WARNING: Internal sanity check failed in event handler for request %d: Discarding the request!", request->number);
1309 ev_request_free(&request);
1313 INSERT_EVENT(callback, request);
1317 static void no_response_to_coa_request(void *ctx)
1319 REQUEST *request = ctx;
1322 rad_assert(request->magic == REQUEST_MAGIC);
1323 rad_assert(request->child_state == REQUEST_PROXIED);
1324 rad_assert(request->home_server != NULL);
1325 rad_assert(!request->in_request_hash);
1327 radlog(L_ERR, "No response to CoA request sent to %s",
1328 inet_ntop(request->proxy->dst_ipaddr.af,
1329 &request->proxy->dst_ipaddr.ipaddr,
1330 buffer, sizeof(buffer)));
1335 request->packet->code |= (PW_COA_REQUEST << 8);
1336 post_proxy_fail_handler(request);
1340 static int update_event_timestamp(RADIUS_PACKET *packet, time_t when)
1344 vp = pairfind(packet->vps, PW_EVENT_TIMESTAMP);
1351 packet->data = NULL;
1352 packet->data_len = 0;
1355 return 1; /* time stamp updated */
1360 * Called when we haven't received a response to a CoA request.
1362 static void retransmit_coa_request(void *ctx)
1366 REQUEST *request = ctx;
1368 rad_assert(request->magic == REQUEST_MAGIC);
1369 rad_assert(request->child_state == REQUEST_PROXIED);
1370 rad_assert(request->home_server != NULL);
1371 rad_assert(!request->in_request_hash);
1372 rad_assert(request->parent == NULL);
1374 fr_event_now(el, &now);
1377 * Cap count at MRC, if it is non-zero.
1379 if (request->home_server->coa_mrc &&
1380 (request->num_coa_requests >= request->home_server->coa_mrc)) {
1381 no_response_to_coa_request(request);
1386 * RFC 5080 Section 2.2.1
1388 * RT = 2*RTprev + RAND*RTprev
1389 * = 1.9 * RTprev + rand(0,.2) * RTprev
1390 * = 1.9 * RTprev + rand(0,1) * (RTprev / 5)
1393 delay ^= (delay >> 16);
1395 frac = request->delay / 5;
1396 delay = ((frac >> 16) * delay) + (((frac & 0xffff) * delay) >> 16);
1398 delay += (2 * request->delay) - (request->delay / 10);
1401 * Cap delay at MRT, if MRT is non-zero.
1403 if (request->home_server->coa_mrt &&
1404 (delay > (request->home_server->coa_mrt * USEC))) {
1405 int mrt_usec = request->home_server->coa_mrt * USEC;
1408 * delay = MRT + RAND * MRT
1409 * = 0.9 MRT + rand(0,.2) * MRT
1412 delay ^= (delay >> 15);
1414 delay = ((mrt_usec >> 16) * delay) + (((mrt_usec & 0xffff) * delay) >> 16);
1415 delay += mrt_usec - (mrt_usec / 10);
1418 request->delay = delay;
1419 request->when = now;
1420 tv_add(&request->when, request->delay);
1421 mrd = request->proxy_when;
1422 mrd.tv_sec += request->home_server->coa_mrd;
1425 * Cap duration at MRD.
1427 if (timercmp(&mrd, &request->when, <)) {
1428 request->when = mrd;
1429 INSERT_EVENT(no_response_to_coa_request, request);
1432 INSERT_EVENT(retransmit_coa_request, request);
1435 if (update_event_timestamp(request->proxy, now.tv_sec)) {
1436 if (!insert_into_proxy_hash(request, TRUE)) {
1437 DEBUG("ERROR: Failed re-inserting CoA request into proxy hash.");
1441 request->num_proxied_requests = 0;
1442 request->num_proxied_responses = 0;
1445 request->num_proxied_requests++;
1446 request->num_coa_requests++; /* is NOT reset by code 3 lines above! */
1448 request->proxy_listener->send(request->proxy_listener,
1454 * The original request is either DONE, or in CLEANUP_DELAY.
1456 static int originated_coa_request(REQUEST *request)
1458 int delay, rcode, pre_proxy_type = 0;
1464 rad_assert(request->proxy == NULL);
1465 rad_assert(!request->in_proxy_hash);
1466 rad_assert(request->proxy_reply == NULL);
1468 vp = pairfind(request->config_items, PW_SEND_COA_REQUEST);
1469 if (!vp && request->coa) vp = pairfind(request->coa->proxy->vps, PW_SEND_COA_REQUEST);
1471 if (vp->vp_integer == 0) {
1472 ev_request_free(&request->coa);
1473 return 1; /* success */
1476 if (!request->coa) request_alloc_coa(request);
1477 if (!request->coa) return 0;
1483 * src_ipaddr will be set up in proxy_encode.
1485 memset(&ipaddr, 0, sizeof(ipaddr));
1486 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_IP_ADDRESS);
1488 ipaddr.af = AF_INET;
1489 ipaddr.ipaddr.ip4addr.s_addr = vp->vp_ipaddr;
1491 } else if ((vp = pairfind(coa->proxy->vps,
1492 PW_PACKET_DST_IPV6_ADDRESS)) != NULL) {
1493 ipaddr.af = AF_INET6;
1494 ipaddr.ipaddr.ip6addr = vp->vp_ipv6addr;
1496 } else if ((vp = pairfind(coa->proxy->vps,
1497 PW_HOME_SERVER_POOL)) != NULL) {
1498 coa->home_pool = home_pool_byname(vp->vp_strvalue,
1500 if (!coa->home_pool) {
1501 RDEBUG2("WARNING: No such home_server_pool %s",
1504 ev_request_free(&request->coa);
1511 } else if (request->client->coa_pool) {
1512 coa->home_pool = request->client->coa_pool;
1514 } else if (request->client->coa_server) {
1515 coa->home_server = request->client->coa_server;
1519 * If all else fails, send it to the client that
1520 * originated this request.
1522 memcpy(&ipaddr, &request->packet->src_ipaddr, sizeof(ipaddr));
1526 * Use the pool, if it exists.
1528 if (coa->home_pool) {
1529 coa->home_server = home_server_ldb(NULL, coa->home_pool, coa);
1530 if (!coa->home_server) {
1531 RDEBUG("WARNING: No live home server for home_server_pool %s", vp->vp_strvalue);
1535 } else if (!coa->home_server) {
1536 int port = PW_COA_UDP_PORT;
1538 vp = pairfind(coa->proxy->vps, PW_PACKET_DST_PORT);
1539 if (vp) port = vp->vp_integer;
1541 coa->home_server = home_server_find(&ipaddr, port);
1542 if (!coa->home_server) {
1543 RDEBUG2("WARNING: Unknown destination %s:%d for CoA request.",
1544 inet_ntop(ipaddr.af, &ipaddr.ipaddr,
1545 buffer, sizeof(buffer)), port);
1550 vp = pairfind(coa->proxy->vps, PW_PACKET_TYPE);
1552 switch (vp->vp_integer) {
1553 case PW_COA_REQUEST:
1554 case PW_DISCONNECT_REQUEST:
1555 coa->proxy->code = vp->vp_integer;
1559 DEBUG("Cannot set CoA Packet-Type to code %d",
1565 if (!coa->proxy->code) coa->proxy->code = PW_COA_REQUEST;
1568 * The rest of the server code assumes that
1569 * request->packet && request->reply exist. Copy them
1570 * from the original request.
1572 rad_assert(coa->packet != NULL);
1573 rad_assert(coa->packet->vps == NULL);
1574 memcpy(coa->packet, request->packet, sizeof(*request->packet));
1575 coa->packet->vps = paircopy(request->packet->vps);
1576 coa->packet->data = NULL;
1577 rad_assert(coa->reply != NULL);
1578 rad_assert(coa->reply->vps == NULL);
1579 memcpy(coa->reply, request->reply, sizeof(*request->reply));
1580 coa->reply->vps = paircopy(request->reply->vps);
1581 coa->reply->data = NULL;
1582 coa->config_items = paircopy(request->config_items);
1585 * Call the pre-proxy routines.
1587 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
1589 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
1590 pre_proxy_type = vp->vp_integer;
1593 if (coa->home_pool && coa->home_pool->virtual_server) {
1594 const char *old_server = coa->server;
1596 coa->server = coa->home_pool->virtual_server;
1597 RDEBUG2(" server %s {", coa->server);
1598 rcode = module_pre_proxy(pre_proxy_type, coa);
1600 coa->server = old_server;
1602 rcode = module_pre_proxy(pre_proxy_type, coa);
1609 * Only send the CoA packet if the pre-proxy code succeeded.
1611 case RLM_MODULE_NOOP:
1613 case RLM_MODULE_UPDATED:
1618 * Source IP / port is set when the proxy socket
1621 coa->proxy->dst_ipaddr = coa->home_server->ipaddr;
1622 coa->proxy->dst_port = coa->home_server->port;
1624 if (!insert_into_proxy_hash(coa, FALSE)) {
1625 DEBUG("ERROR: Failed inserting CoA request into proxy hash.");
1630 * We CANNOT divorce the CoA request from the parent
1631 * request. This function is running in a child thread,
1632 * and we need access to the main event loop in order to
1633 * to add the timers for the CoA packet. See
1638 * Forget about the original request completely at this
1643 gettimeofday(&request->proxy_when, NULL);
1644 request->received = request->next_when = request->proxy_when;
1645 rad_assert(request->proxy_reply == NULL);
1648 * Implement re-transmit algorithm as per RFC 5080
1651 * We want IRT + RAND*IRT
1652 * or 0.9 IRT + rand(0,.2) IRT
1654 * 2^20 ~ USEC, and we want 2.
1655 * rand(0,0.2) USEC ~ (rand(0,2^21) / 10)
1657 delay = (fr_rand() & ((1 << 22) - 1)) / 10;
1658 request->delay = delay * request->home_server->coa_irt;
1659 delay = request->home_server->coa_irt * USEC;
1660 delay -= delay / 10;
1661 delay += request->delay;
1663 request->delay = delay;
1664 tv_add(&request->next_when, delay);
1665 request->next_callback = retransmit_coa_request;
1668 * Note that we set proxied BEFORE sending the packet.
1670 * Once we send it, the request is tainted, as
1671 * another thread may have picked it up. Don't
1674 request->num_proxied_requests = 1;
1675 request->num_proxied_responses = 0;
1676 request->child_pid = NO_SUCH_CHILD_PID;
1678 update_event_timestamp(request->proxy, request->proxy_when.tv_sec);
1680 request->child_state = REQUEST_PROXIED;
1682 DEBUG_PACKET(request, request->proxy, 1);
1684 request->proxy_listener->send(request->proxy_listener,
1688 #endif /* WITH_COA */
1691 static int process_proxy_reply(REQUEST *request)
1694 int post_proxy_type = 0;
1698 * Delete any reply we had accumulated until now.
1700 pairfree(&request->reply->vps);
1703 * Run the packet through the post-proxy stage,
1704 * BEFORE playing games with the attributes.
1706 vp = pairfind(request->config_items, PW_POST_PROXY_TYPE);
1708 RDEBUG2(" Found Post-Proxy-Type %s", vp->vp_strvalue);
1709 post_proxy_type = vp->vp_integer;
1712 if (request->home_pool && request->home_pool->virtual_server) {
1713 const char *old_server = request->server;
1715 request->server = request->home_pool->virtual_server;
1716 RDEBUG2(" server %s {", request->server);
1717 rcode = module_post_proxy(post_proxy_type, request);
1719 request->server = old_server;
1721 rcode = module_post_proxy(post_proxy_type, request);
1725 if (request->packet->code == request->proxy->code)
1727 * Don't run the next bit if we originated a CoA
1728 * packet, after receiving an Access-Request or
1729 * Accounting-Request.
1734 * There may NOT be a proxy reply, as we may be
1735 * running Post-Proxy-Type = Fail.
1737 if (request->proxy_reply) {
1739 * Delete the Proxy-State Attributes from
1740 * the reply. These include Proxy-State
1741 * attributes from us and remote server.
1743 pairdelete(&request->proxy_reply->vps, PW_PROXY_STATE);
1746 * Add the attributes left in the proxy
1747 * reply to the reply list.
1749 pairadd(&request->reply->vps, request->proxy_reply->vps);
1750 request->proxy_reply->vps = NULL;
1753 * Free proxy request pairs.
1755 pairfree(&request->proxy->vps);
1759 default: /* Don't do anything */
1761 case RLM_MODULE_FAIL:
1762 /* FIXME: debug print stuff */
1763 request->child_state = REQUEST_DONE;
1766 case RLM_MODULE_HANDLED:
1767 /* FIXME: debug print stuff */
1768 request->child_state = REQUEST_DONE;
1776 static int request_pre_handler(REQUEST *request)
1780 rad_assert(request->magic == REQUEST_MAGIC);
1781 rad_assert(request->packet != NULL);
1783 request->child_state = REQUEST_RUNNING;
1786 * Don't decode the packet if it's an internal "fake"
1787 * request. Instead, just return so that the caller can
1790 if (request->packet->dst_port == 0) {
1791 request->username = pairfind(request->packet->vps,
1793 request->password = pairfind(request->packet->vps,
1800 * Put the decoded packet into it's proper place.
1802 if (request->proxy_reply != NULL) {
1803 rcode = request->proxy_listener->decode(request->proxy_listener,
1805 DEBUG_PACKET(request, request->proxy_reply, 0);
1808 if (request->packet->vps == NULL) {
1809 rcode = request->listener->decode(request->listener, request);
1811 if (debug_condition) {
1813 const char *my_debug = debug_condition;
1816 * Ignore parse errors.
1818 radius_evaluate_condition(request, RLM_MODULE_OK, 0,
1822 request->options = 2;
1823 request->radlog = radlog_request;
1827 DEBUG_PACKET(request, request->packet, 0);
1833 radlog(L_ERR, "%s Dropping packet without response.", fr_strerror());
1834 request->child_state = REQUEST_DONE;
1838 if (!request->username) {
1839 request->username = pairfind(request->packet->vps,
1844 if (request->proxy) {
1845 return process_proxy_reply(request);
1855 * Do state handling when we proxy a request.
1857 static int proxy_request(REQUEST *request)
1859 struct timeval when;
1862 if (request->home_server->server) {
1863 RDEBUG("ERROR: Cannot perform real proxying to a virtual server.");
1867 if (!insert_into_proxy_hash(request, FALSE)) {
1868 RDEBUG("ERROR: Failed inserting request into proxy hash.");
1872 request->proxy_listener->encode(request->proxy_listener, request);
1874 when = request->received;
1875 when.tv_sec += request->root->max_request_time;
1877 gettimeofday(&request->proxy_when, NULL);
1879 request->next_when = request->proxy_when;
1880 request->next_when.tv_sec += request->home_server->response_window;
1882 rad_assert(request->home_server->response_window > 0);
1884 if (timercmp(&when, &request->next_when, <)) {
1885 request->next_when = when;
1887 request->next_callback = no_response_to_proxied_request;
1889 RDEBUG2("Proxying request %d to home server %s port %d",
1891 inet_ntop(request->proxy->dst_ipaddr.af,
1892 &request->proxy->dst_ipaddr.ipaddr,
1893 buffer, sizeof(buffer)),
1894 request->proxy->dst_port);
1897 * Note that we set proxied BEFORE sending the packet.
1899 * Once we send it, the request is tainted, as
1900 * another thread may have picked it up. Don't
1903 request->num_proxied_requests = 1;
1904 request->num_proxied_responses = 0;
1905 #ifdef HAVE_PTHREAD_H
1906 request->child_pid = NO_SUCH_CHILD_PID;
1908 request->child_state = REQUEST_PROXIED;
1910 DEBUG_PACKET(request, request->proxy, 1);
1912 request->proxy_listener->send(request->proxy_listener,
1919 * "Proxy" the request by sending it to a new virtual server.
1921 static int proxy_to_virtual_server(REQUEST *request)
1924 RAD_REQUEST_FUNP fun;
1926 if (!request->home_server || !request->home_server->server) return 0;
1928 if (request->parent) {
1929 RDEBUG2("WARNING: Cancelling proxy request to virtual server %s as this request was itself proxied.", request->home_server->server);
1933 fake = request_alloc_fake(request);
1935 RDEBUG2("WARNING: Out of memory");
1939 fake->packet->vps = paircopy(request->proxy->vps);
1940 fake->server = request->home_server->server;
1942 if (request->proxy->code == PW_AUTHENTICATION_REQUEST) {
1943 fun = rad_authenticate;
1945 #ifdef WITH_ACCOUNTING
1946 } else if (request->proxy->code == PW_ACCOUNTING_REQUEST) {
1947 fun = rad_accounting;
1951 RDEBUG2("Unknown packet type %d", request->proxy->code);
1952 ev_request_free(&fake);
1956 RDEBUG2(">>> Sending proxied request internally to virtual server.");
1957 radius_handle_request(fake, fun);
1958 RDEBUG2("<<< Received proxied response from internal virtual server.");
1960 request->proxy_reply = fake->reply;
1963 ev_request_free(&fake);
1965 process_proxy_reply(request);
1967 if (request->server) RDEBUG("server %s {",
1968 request->server != NULL ?
1969 request->server : "");
1972 if (request->server) RDEBUG("} # server %s",
1973 request->server != NULL ?
1974 request->server : "");
1976 return 2; /* success, but NOT '1' !*/
1980 * Return 1 if we did proxy it, or the proxy attempt failed
1981 * completely. Either way, the caller doesn't touch the request
1982 * any more if we return 1.
1984 static int successfully_proxied_request(REQUEST *request)
1987 int pre_proxy_type = 0;
1988 VALUE_PAIR *realmpair;
1989 VALUE_PAIR *strippedname;
1991 char *realmname = NULL;
1993 REALM *realm = NULL;
1997 * If it was already proxied, do nothing.
1999 * FIXME: This should really be a serious error.
2001 if (request->in_proxy_hash) {
2005 realmpair = pairfind(request->config_items, PW_PROXY_TO_REALM);
2006 if (!realmpair || (realmpair->length == 0)) {
2010 realmname = (char *) realmpair->vp_strvalue;
2012 realm = realm_find2(realmname);
2014 RDEBUG2("ERROR: Cannot proxy to unknown realm %s", realmname);
2019 * Figure out which pool to use.
2021 if (request->packet->code == PW_AUTHENTICATION_REQUEST) {
2022 pool = realm->auth_pool;
2024 #ifdef WITH_ACCOUNTING
2025 } else if (request->packet->code == PW_ACCOUNTING_REQUEST) {
2026 pool = realm->acct_pool;
2030 rad_panic("Internal sanity check failed");
2034 RDEBUG2(" WARNING: Cancelling proxy to Realm %s, as the realm is local.",
2039 home = home_server_ldb(realmname, pool, request);
2041 RDEBUG2("ERROR: Failed to find live home server for realm %s",
2045 request->home_pool = pool;
2049 * Once we've decided to proxy a request, we cannot send
2050 * a CoA packet. So we free up any CoA packet here.
2052 ev_request_free(&request->coa);
2055 * Remember that we sent the request to a Realm.
2057 pairadd(&request->packet->vps,
2058 pairmake("Realm", realmname, T_OP_EQ));
2061 * Strip the name, if told to.
2063 * Doing it here catches the case of proxied tunneled
2066 if (realm->striprealm == TRUE &&
2067 (strippedname = pairfind(request->proxy->vps, PW_STRIPPED_USER_NAME)) != NULL) {
2069 * If there's a Stripped-User-Name attribute in
2070 * the request, then use THAT as the User-Name
2071 * for the proxied request, instead of the
2074 * This is done by making a copy of the
2075 * Stripped-User-Name attribute, turning it into
2076 * a User-Name attribute, deleting the
2077 * Stripped-User-Name and User-Name attributes
2078 * from the vps list, and making the new
2079 * User-Name the head of the vps list.
2081 vp = pairfind(request->proxy->vps, PW_USER_NAME);
2083 vp = radius_paircreate(request, NULL,
2084 PW_USER_NAME, PW_TYPE_STRING);
2085 rad_assert(vp != NULL); /* handled by above function */
2086 /* Insert at the START of the list */
2087 vp->next = request->proxy->vps;
2088 request->proxy->vps = vp;
2090 memcpy(vp->vp_strvalue, strippedname->vp_strvalue,
2091 sizeof(vp->vp_strvalue));
2092 vp->length = strippedname->length;
2095 * Do NOT delete Stripped-User-Name.
2100 * If there is no PW_CHAP_CHALLENGE attribute but
2101 * there is a PW_CHAP_PASSWORD we need to add it
2102 * since we can't use the request authenticator
2103 * anymore - we changed it.
2105 if (pairfind(request->proxy->vps, PW_CHAP_PASSWORD) &&
2106 pairfind(request->proxy->vps, PW_CHAP_CHALLENGE) == NULL) {
2107 vp = radius_paircreate(request, &request->proxy->vps,
2108 PW_CHAP_CHALLENGE, PW_TYPE_OCTETS);
2109 vp->length = AUTH_VECTOR_LEN;
2110 memcpy(vp->vp_strvalue, request->packet->vector, AUTH_VECTOR_LEN);
2114 * The RFC's say we have to do this, but FreeRADIUS
2117 vp = radius_paircreate(request, &request->proxy->vps,
2118 PW_PROXY_STATE, PW_TYPE_OCTETS);
2119 snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue), "%d",
2120 request->packet->id);
2121 vp->length = strlen(vp->vp_strvalue);
2124 * Should be done BEFORE inserting into proxy hash, as
2125 * pre-proxy may use this information, or change it.
2127 request->proxy->code = request->packet->code;
2130 * Call the pre-proxy routines.
2132 vp = pairfind(request->config_items, PW_PRE_PROXY_TYPE);
2134 RDEBUG2(" Found Pre-Proxy-Type %s", vp->vp_strvalue);
2135 pre_proxy_type = vp->vp_integer;
2138 rad_assert(request->home_pool != NULL);
2140 if (request->home_pool->virtual_server) {
2141 const char *old_server = request->server;
2143 request->server = request->home_pool->virtual_server;
2144 RDEBUG2(" server %s {", request->server);
2145 rcode = module_pre_proxy(pre_proxy_type, request);
2147 request->server = old_server;
2149 rcode = module_pre_proxy(pre_proxy_type, request);
2152 case RLM_MODULE_FAIL:
2153 case RLM_MODULE_INVALID:
2154 case RLM_MODULE_NOTFOUND:
2155 case RLM_MODULE_USERLOCK:
2157 /* FIXME: debug print failed stuff */
2160 case RLM_MODULE_REJECT:
2161 case RLM_MODULE_HANDLED:
2165 * Only proxy the packet if the pre-proxy code succeeded.
2167 case RLM_MODULE_NOOP:
2169 case RLM_MODULE_UPDATED:
2174 * If it's a fake request, don't send the proxy
2175 * packet. The outer tunnel session will take
2176 * care of doing that.
2178 if (request->packet->dst_port == 0) {
2179 request->home_server = NULL;
2183 if (request->home_server->server) {
2184 return proxy_to_virtual_server(request);
2187 if (!proxy_request(request)) {
2188 RDEBUG("ERROR: Failed to proxy request %d", request->number);
2196 static void request_post_handler(REQUEST *request)
2198 int child_state = -1;
2199 struct timeval when;
2202 if ((request->master_state == REQUEST_STOP_PROCESSING) ||
2204 (request->parent->master_state == REQUEST_STOP_PROCESSING))) {
2205 RDEBUG2("Request %d was cancelled.", request->number);
2206 #ifdef HAVE_PTHREAD_H
2207 request->child_pid = NO_SUCH_CHILD_PID;
2209 child_state = REQUEST_DONE;
2213 if (request->child_state != REQUEST_RUNNING) {
2214 rad_panic("Internal sanity check failed");
2219 * If it's not in the request hash, it's a CoA request.
2222 if (!request->in_request_hash &&
2224 ((request->proxy->code == PW_COA_REQUEST) ||
2225 (request->proxy->code == PW_DISCONNECT_REQUEST))) {
2226 request->next_callback = NULL;
2227 child_state = REQUEST_DONE;
2232 if ((request->reply->code == 0) &&
2233 ((vp = pairfind(request->config_items, PW_AUTH_TYPE)) != NULL) &&
2234 (vp->vp_integer == PW_AUTHTYPE_REJECT)) {
2235 request->reply->code = PW_AUTHENTICATION_REJECT;
2239 if (request->root->proxy_requests &&
2240 !request->in_proxy_hash &&
2241 (request->reply->code == 0) &&
2242 (request->packet->dst_port != 0) &&
2243 (request->packet->code != PW_STATUS_SERVER)) {
2244 int rcode = successfully_proxied_request(request);
2246 if (rcode == 1) return; /* request is invalid */
2249 * Failed proxying it (dead home servers, etc.)
2250 * Run it through Post-Proxy-Type = Fail, and
2251 * respond to the request.
2253 * Note that we're in a child thread here, so we
2254 * do NOT re-schedule the request. Instead, we
2255 * do what we would have done, which is run the
2256 * pre-handler, a NULL request handler, and then
2259 if ((rcode < 0) && setup_post_proxy_fail(request)) {
2260 request_pre_handler(request);
2264 * Else we weren't supposed to proxy it,
2265 * OR we proxied it internally to a virutal server.
2271 * Fake requests don't get encoded or signed. The caller
2272 * also requires the reply VP's, so we don't free them
2275 if (request->packet->dst_port == 0) {
2276 /* FIXME: RDEBUG going to the next request */
2277 #ifdef HAVE_PTHREAD_H
2278 request->child_pid = NO_SUCH_CHILD_PID;
2280 request->child_state = REQUEST_DONE;
2286 * Copy Proxy-State from the request to the reply.
2288 vp = paircopy2(request->packet->vps, PW_PROXY_STATE);
2289 if (vp) pairadd(&request->reply->vps, vp);
2293 * Access-Requests get delayed or cached.
2295 switch (request->packet->code) {
2296 case PW_AUTHENTICATION_REQUEST:
2297 gettimeofday(&request->next_when, NULL);
2299 if (request->reply->code == 0) {
2301 * Check if the lack of response is intentional.
2303 vp = pairfind(request->config_items,
2304 PW_RESPONSE_PACKET_TYPE);
2306 RDEBUG2("There was no response configured: rejecting request %d",
2308 request->reply->code = PW_AUTHENTICATION_REJECT;
2310 } else if (vp->vp_integer == 256) {
2311 RDEBUG2("Not responding to request %d",
2315 * Force cleanup after a long
2316 * time, so that we don't
2317 * re-process the packet.
2319 request->next_when.tv_sec += request->root->max_request_time;
2320 request->next_callback = cleanup_delay;
2321 child_state = REQUEST_CLEANUP_DELAY;
2324 request->reply->code = vp->vp_integer;
2330 * Run rejected packets through
2332 * Post-Auth-Type = Reject
2334 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2335 pairdelete(&request->config_items, PW_POST_AUTH_TYPE);
2336 vp = radius_pairmake(request, &request->config_items,
2337 "Post-Auth-Type", "Reject",
2339 if (vp) rad_postauth(request);
2342 * If configured, delay Access-Reject packets.
2344 * If request->root->reject_delay = 0, we discover
2345 * that we have to send the packet now.
2347 when = request->received;
2348 when.tv_sec += request->root->reject_delay;
2350 if (timercmp(&when, &request->next_when, >)) {
2351 RDEBUG2("Delaying reject of request %d for %d seconds",
2353 request->root->reject_delay);
2354 request->next_when = when;
2355 request->next_callback = reject_delay;
2356 #ifdef HAVE_PTHREAD_H
2357 request->child_pid = NO_SUCH_CHILD_PID;
2359 request->child_state = REQUEST_REJECT_DELAY;
2364 request->next_when.tv_sec += request->root->cleanup_delay;
2365 request->next_callback = cleanup_delay;
2366 child_state = REQUEST_CLEANUP_DELAY;
2369 case PW_ACCOUNTING_REQUEST:
2370 request->next_callback = NULL; /* just to be safe */
2371 child_state = REQUEST_DONE;
2375 * FIXME: Status-Server should probably not be
2378 case PW_STATUS_SERVER:
2379 request->next_callback = NULL;
2380 child_state = REQUEST_DONE;
2384 if ((request->packet->code > 1024) &&
2385 (request->packet->code < (1024 + 254 + 1))) {
2386 request->next_callback = NULL;
2387 child_state = REQUEST_DONE;
2391 radlog(L_ERR, "Unknown packet type %d", request->packet->code);
2392 request->next_callback = NULL;
2393 child_state = REQUEST_DONE;
2398 * Suppress "no reply" packets here, unless we're reading
2399 * from the "detail" file. In that case, we've got to
2400 * tell the detail file handler that the request is dead,
2401 * and it should re-send it.
2402 * If configured, encode, sign, and send.
2404 if ((request->reply->code != 0) ||
2405 (request->listener->type == RAD_LISTEN_DETAIL)) {
2406 DEBUG_PACKET(request, request->reply, 1);
2407 request->listener->send(request->listener, request);
2412 * Now that we've completely processed the request,
2413 * see if we need to originate a CoA request.
2416 (pairfind(request->config_items, PW_SEND_COA_REQUEST) != NULL)) {
2417 if (!originated_coa_request(request)) {
2418 RDEBUG2("Do CoA Fail handler here");
2420 /* request->coa is stil set, so we can update events */
2426 * Clean up. These are no longer needed.
2428 pairfree(&request->config_items);
2430 pairfree(&request->packet->vps);
2431 request->username = NULL;
2432 request->password = NULL;
2434 pairfree(&request->reply->vps);
2437 if (request->proxy) {
2438 pairfree(&request->proxy->vps);
2440 if (request->proxy_reply) {
2441 pairfree(&request->proxy_reply->vps);
2446 * We're not tracking responses from the home
2447 * server, we can therefore free this memory in
2450 if (!request->in_proxy_hash) {
2451 rad_free(&request->proxy);
2452 rad_free(&request->proxy_reply);
2453 request->home_server = NULL;
2459 RDEBUG2("Finished request %d.", request->number);
2460 rad_assert(child_state >= 0);
2461 request->child_state = child_state;
2464 * Single threaded mode: update timers now.
2466 if (!have_children) wait_a_bit(request);
2470 static void received_retransmit(REQUEST *request, const RADCLIENT *client)
2476 RAD_STATS_TYPE_INC(request->listener, total_dup_requests);
2477 RAD_STATS_CLIENT_INC(request->listener, client, total_dup_requests);
2479 switch (request->child_state) {
2480 case REQUEST_QUEUED:
2481 case REQUEST_RUNNING:
2485 radlog(L_ERR, "Discarding duplicate request from "
2486 "client %s port %d - ID: %d due to unfinished request %d",
2488 request->packet->src_port,request->packet->id,
2493 case REQUEST_PROXIED:
2495 * We're not supposed to have duplicate
2496 * accounting packets. The other states handle
2497 * duplicates fine (discard, or send duplicate
2498 * reply). But we do NOT want to retransmit an
2499 * accounting request here, because that would
2500 * involve updating the Acct-Delay-Time, and
2501 * therefore changing the packet Id, etc.
2503 * Instead, we just discard the packet. We may
2504 * eventually respond, or the client will send a
2505 * new accounting packet.
2507 * The same comments go for Status-Server, and
2508 * other packet types.
2510 * FIXME: coa: when we proxy CoA && Disconnect
2511 * packets, this logic has to be fixed.
2513 if (request->packet->code != PW_AUTHENTICATION_REQUEST) {
2517 check_for_zombie_home_server(request);
2520 * If we've just discovered that the home server is
2521 * dead, send the packet to another one.
2523 if ((request->packet->dst_port != 0) &&
2524 (request->home_server->state == HOME_STATE_IS_DEAD)) {
2527 remove_from_proxy_hash(request);
2529 home = home_server_ldb(NULL, request->home_pool, request);
2531 RDEBUG2("Failed to find live home server for request %d", request->number);
2534 * Do post-request processing,
2535 * and any insertion of necessary
2538 post_proxy_fail_handler(request);
2542 request->proxy->code = request->packet->code;
2545 * Free the old packet, to force re-encoding
2547 free(request->proxy->data);
2548 request->proxy->data = NULL;
2549 request->proxy->data_len = 0;
2552 * This request failed over to a virtual
2553 * server. Push it back onto the queue
2556 if (request->home_server->server) {
2557 proxy_fallback_handler(request);
2562 * Try to proxy the request.
2564 if (!proxy_request(request)) {
2565 RDEBUG("ERROR: Failed to re-proxy request %d", request->number);
2566 goto no_home_servers;
2570 * This code executes in the main server
2571 * thread, so there's no need for locking.
2573 rad_assert(request->next_callback != NULL);
2574 INSERT_EVENT(request->next_callback, request);
2575 request->next_callback = NULL;
2577 } /* else the home server is still alive */
2579 RDEBUG2("Sending duplicate proxied request to home server %s port %d - ID: %d",
2580 inet_ntop(request->proxy->dst_ipaddr.af,
2581 &request->proxy->dst_ipaddr.ipaddr,
2582 buffer, sizeof(buffer)),
2583 request->proxy->dst_port,
2584 request->proxy->id);
2585 request->num_proxied_requests++;
2587 DEBUG_PACKET(request, request->proxy, 1);
2588 request->proxy_listener->send(request->proxy_listener,
2593 case REQUEST_REJECT_DELAY:
2594 RDEBUG2("Waiting to send Access-Reject "
2595 "to client %s port %d - ID: %d",
2597 request->packet->src_port, request->packet->id);
2600 case REQUEST_CLEANUP_DELAY:
2602 if (request->reply->code == 0) {
2603 RDEBUG2("Ignoring retransmit from client %s port %d "
2604 "- ID: %d, no reply was configured",
2606 request->packet->src_port, request->packet->id);
2611 * FIXME: This sends duplicate replies to
2612 * accounting requests, even if Acct-Delay-Time
2613 * or Event-Timestamp is in the packet. In those
2614 * cases, the Id should be changed, and the packet
2617 RDEBUG2("Sending duplicate reply "
2618 "to client %s port %d - ID: %d",
2620 request->packet->src_port, request->packet->id);
2621 DEBUG_PACKET(request, request->reply, 1);
2622 request->listener->send(request->listener, request);
2628 static void received_conflicting_request(REQUEST *request,
2629 const RADCLIENT *client)
2631 radlog(L_ERR, "Received conflicting packet from "
2632 "client %s port %d - ID: %d due to unfinished request %d. Giving up on old request.",
2634 request->packet->src_port, request->packet->id,
2638 * Nuke it from the request hash, so we can receive new
2641 remove_from_request_hash(request);
2643 switch (request->child_state) {
2644 #ifdef HAVE_PTHREAD_H
2646 * It's queued or running. Tell it to stop, and
2647 * wait for it to do so.
2649 case REQUEST_QUEUED:
2650 case REQUEST_RUNNING:
2651 request->master_state = REQUEST_STOP_PROCESSING;
2652 request->delay += request->delay >> 1;
2654 tv_add(&request->when, request->delay);
2656 INSERT_EVENT(wait_for_child_to_die, request);
2661 * It's in some other state, and therefore also
2662 * in the event queue. At some point, the
2663 * child will notice, and we can then delete it.
2666 rad_assert(request->ev != NULL);
2672 static int can_handle_new_request(RADIUS_PACKET *packet,
2674 struct main_config_t *root)
2677 * Count the total number of requests, to see if
2678 * there are too many. If so, return with an
2681 if (root->max_requests) {
2682 int request_count = fr_packet_list_num_elements(pl);
2685 * This is a new request. Let's see if
2686 * it makes us go over our configured
2689 if (request_count > root->max_requests) {
2690 radlog(L_ERR, "Dropping request (%d is too many): "
2691 "from client %s port %d - ID: %d", request_count,
2693 packet->src_port, packet->id);
2694 radlog(L_INFO, "WARNING: Please check the configuration file.\n"
2695 "\tThe value for 'max_requests' is probably set too low.\n");
2697 } /* else there were a small number of requests */
2698 } /* else there was no configured limit for requests */
2701 * FIXME: Add per-client checks. If one client is sending
2702 * too many packets, start discarding them.
2704 * We increment the counters here, and decrement them
2705 * when the response is sent... somewhere in this file.
2709 * FUTURE: Add checks for system load. If the system is
2710 * busy, start dropping requests...
2712 * We can probably keep some statistics ourselves... if
2713 * there are more requests coming in than we can handle,
2714 * start dropping some.
2721 int received_request(rad_listen_t *listener,
2722 RADIUS_PACKET *packet, REQUEST **prequest,
2725 RADIUS_PACKET **packet_p;
2726 REQUEST *request = NULL;
2727 struct main_config_t *root = &mainconfig;
2729 packet_p = fr_packet_list_find(pl, packet);
2731 request = fr_packet2myptr(REQUEST, packet, packet_p);
2732 rad_assert(request->in_request_hash);
2734 if ((request->packet->data_len == packet->data_len) &&
2735 (memcmp(request->packet->vector, packet->vector,
2736 sizeof(packet->vector)) == 0)) {
2737 received_retransmit(request, client);
2742 * The new request is different from the old one,
2743 * but maybe the old is finished. If so, delete
2746 switch (request->child_state) {
2747 struct timeval when;
2751 * Special hacks for race conditions.
2752 * The reply is encoded, and therefore
2753 * likely sent. We received a *new*
2754 * packet from the client, likely before
2755 * the next line or two of code which
2756 * updated the child state. In this
2757 * case, just accept the new request.
2759 if ((request->reply->code != 0) &&
2760 request->reply->data) {
2761 radlog(L_INFO, "WARNING: Allowing fast client %s port %d - ID: %d for recent request %d.",
2763 packet->src_port, packet->id,
2765 remove_from_request_hash(request);
2770 gettimeofday(&when, NULL);
2774 * If the cached request was received
2775 * within the last second, then we
2776 * discard the NEW request instead of the
2777 * old one. This will happen ONLY when
2778 * the client is severely broken, and is
2779 * sending conflicting packets very
2782 if (timercmp(&when, &request->received, <)) {
2783 radlog(L_ERR, "Discarding conflicting packet from "
2784 "client %s port %d - ID: %d due to recent request %d.",
2786 packet->src_port, packet->id,
2791 received_conflicting_request(request, client);
2795 case REQUEST_REJECT_DELAY:
2796 case REQUEST_CLEANUP_DELAY:
2797 request->child_state = REQUEST_DONE;
2799 cleanup_delay(request);
2806 * We may want to quench the new request.
2808 if ((listener->type != RAD_LISTEN_DETAIL) &&
2809 !can_handle_new_request(packet, client, root)) {
2814 * Create and initialize the new request.
2816 request = request_alloc(); /* never fails */
2818 if ((request->reply = rad_alloc(0)) == NULL) {
2819 radlog(L_ERR, "No memory");
2823 request->listener = listener;
2824 request->client = client;
2825 request->packet = packet;
2826 request->packet->timestamp = request->timestamp;
2827 request->number = request_num_counter++;
2828 request->priority = listener->type;
2829 #ifdef HAVE_PTHREAD_H
2830 request->child_pid = NO_SUCH_CHILD_PID;
2834 * Status-Server packets go to the head of the queue.
2836 if (request->packet->code == PW_STATUS_SERVER) request->priority = 0;
2839 * Set virtual server identity
2841 if (client->server) {
2842 request->server = client->server;
2843 } else if (listener->server) {
2844 request->server = listener->server;
2846 request->server = NULL;
2850 * Remember the request in the list.
2852 if (!fr_packet_list_insert(pl, &request->packet)) {
2853 radlog(L_ERR, "Failed to insert request %d in the list of live requests: discarding", request->number);
2854 ev_request_free(&request);
2858 request->in_request_hash = TRUE;
2859 request->root = root;
2863 * The request passes many of our sanity checks.
2864 * From here on in, if anything goes wrong, we
2865 * send a reject message, instead of dropping the
2870 * Build the reply template from the request.
2873 request->reply->sockfd = request->packet->sockfd;
2874 request->reply->dst_ipaddr = request->packet->src_ipaddr;
2875 request->reply->src_ipaddr = request->packet->dst_ipaddr;
2876 request->reply->dst_port = request->packet->src_port;
2877 request->reply->src_port = request->packet->dst_port;
2878 request->reply->id = request->packet->id;
2879 request->reply->code = 0; /* UNKNOWN code */
2880 memcpy(request->reply->vector, request->packet->vector,
2881 sizeof(request->reply->vector));
2882 request->reply->vps = NULL;
2883 request->reply->data = NULL;
2884 request->reply->data_len = 0;
2886 request->master_state = REQUEST_ACTIVE;
2887 request->child_state = REQUEST_QUEUED;
2888 request->next_callback = NULL;
2890 gettimeofday(&request->received, NULL);
2891 request->timestamp = request->received.tv_sec;
2892 request->when = request->received;
2894 request->delay = USEC;
2896 tv_add(&request->when, request->delay);
2898 INSERT_EVENT(wait_a_bit, request);
2900 *prequest = request;
2906 REQUEST *received_proxy_response(RADIUS_PACKET *packet)
2912 * Also removes from the proxy hash if responses == requests
2914 request = lookup_in_proxy_hash(packet);
2917 radlog(L_PROXY, "No outstanding request was found for reply from host %s port %d - ID %d",
2918 inet_ntop(packet->src_ipaddr.af,
2919 &packet->src_ipaddr.ipaddr,
2920 buffer, sizeof(buffer)),
2921 packet->src_port, packet->id);
2926 * We haven't replied to the NAS, but we have seen an
2927 * earlier reply from the home server. Ignore this packet,
2928 * as we're likely still processing the previous reply.
2930 if (request->proxy_reply) {
2931 if (memcmp(request->proxy_reply->vector,
2933 sizeof(request->proxy_reply->vector)) == 0) {
2934 RDEBUG2("Discarding duplicate reply from host %s port %d - ID: %d for request %d",
2935 inet_ntop(packet->src_ipaddr.af,
2936 &packet->src_ipaddr.ipaddr,
2937 buffer, sizeof(buffer)),
2938 packet->src_port, packet->id,
2942 * ? The home server gave us a new proxy
2943 * reply which doesn't match the old
2946 RDEBUG2("Ignoring conflicting proxy reply");
2949 /* assert that there's an event queued for request? */
2953 gettimeofday(&now, NULL);
2956 * Maybe move this earlier in the decision process?
2957 * Having it here means that late or duplicate proxy
2958 * replies no longer get the home server marked as
2959 * "alive". This might be good for stability, though.
2961 request->home_server->state = HOME_STATE_ALIVE;
2965 * When originating CoA, the "proxy" reply is the reply
2966 * to the CoA request that we originated. At this point,
2967 * the original request is finished, and it has a reply.
2969 * However, if we haven't separated the two requests, do
2970 * so now. This is done so that cleaning up the original
2971 * request won't cause the CoA request to be free'd. See
2972 * util.c, request_free()
2974 if (request->parent && (request->parent->coa == request)) {
2975 request->parent->coa = NULL;
2976 request->parent = NULL;
2980 * Skip the next set of checks, as the original
2981 * reply is cached. We want to be able to still
2982 * process the CoA reply, AND to reference the
2983 * original request/reply.
2985 * This is getting to be really quite a bit of a
2991 * If there's a reply to the NAS, ignore everything
2992 * related to proxy responses
2994 if (request->reply && request->reply->code != 0) {
2995 RDEBUG2("Ignoring proxy reply that arrived after we sent a reply to the NAS");
3001 * The average includes our time to receive packets and
3002 * look them up in the hashes, which should be the same
3005 * We update the response time only for the FIRST packet
3008 if (request->home_server->ema.window > 0) {
3009 radius_stats_ema(&request->home_server->ema,
3010 &now, &request->proxy_when);
3014 switch (request->child_state) {
3015 case REQUEST_QUEUED:
3016 case REQUEST_RUNNING:
3017 radlog(L_ERR, "Internal sanity check failed for child state");
3020 case REQUEST_REJECT_DELAY:
3021 case REQUEST_CLEANUP_DELAY:
3023 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'",
3024 inet_ntop(packet->src_ipaddr.af,
3025 &packet->src_ipaddr.ipaddr,
3026 buffer, sizeof(buffer)),
3027 packet->src_port, packet->id,
3029 /* assert that there's an event queued for request? */
3032 case REQUEST_PROXIED:
3036 request->proxy_reply = packet;
3040 * Perform RTT calculations, as per RFC 2988 (for TCP).
3041 * Note that we only do so on the first response.
3043 if ((request->num_proxied_responses == 1)
3045 home_server *home = request->home_server;
3047 rtt = now.tv_sec - request->proxy_when.tv_sec;
3050 rtt -= request->proxy_when.tv_usec;
3052 if (!home->has_rtt) {
3053 home->has_rtt = TRUE;
3056 home->rttvar = rtt / 2;
3059 home->rttvar -= home->rttvar >> 2;
3060 home->rttvar += (home->srtt - rtt);
3061 home->srtt -= home->srtt >> 3;
3062 home->srtt += rtt >> 3;
3065 home->rto = home->srtt;
3066 if (home->rttvar > (USEC / 4)) {
3067 home->rto += home->rttvar * 4;
3075 * There's no incoming request, so it's a proxied packet
3078 if (!request->packet) {
3079 received_response_to_ping(request);
3080 request->proxy_reply = NULL; /* caller will free it */
3081 ev_request_free(&request);
3085 request->child_state = REQUEST_QUEUED;
3086 request->when = now;
3087 request->delay = USEC;
3088 request->priority = RAD_LISTEN_PROXY;
3089 tv_add(&request->when, request->delay);
3092 * Wait a bit will take care of max_request_time
3094 INSERT_EVENT(wait_a_bit, request);
3100 void event_new_fd(rad_listen_t *this)
3104 if (this->status == RAD_LISTEN_STATUS_KNOWN) return;
3106 this->print(this, buffer, sizeof(buffer));
3108 if (this->status == RAD_LISTEN_STATUS_INIT) {
3110 DEBUG("Listening on %s", buffer);
3112 DEBUG2(" ... adding new socket %s", buffer);
3114 if (!fr_event_fd_insert(el, 0, this->fd,
3115 event_socket_handler, this)) {
3116 radlog(L_ERR, "Failed remembering handle for proxy socket!");
3120 this->status = RAD_LISTEN_STATUS_KNOWN;
3124 if (this->status == RAD_LISTEN_STATUS_CLOSED) {
3125 DEBUG2(" ... closing socket %s", buffer);
3127 fr_event_fd_delete(el, 0, this->fd);
3128 this->status = RAD_LISTEN_STATUS_FINISH;
3131 * Close the fd AFTER fixing up the requests and
3132 * listeners, so that they don't send/recv on the
3133 * wrong socket (if someone manages to open
3141 static void handle_signal_self(int flag)
3143 if ((flag & (RADIUS_SIGNAL_SELF_EXIT | RADIUS_SIGNAL_SELF_TERM)) != 0) {
3144 if ((flag & RADIUS_SIGNAL_SELF_EXIT) != 0) {
3145 fr_event_loop_exit(el, 1);
3147 fr_event_loop_exit(el, 2);
3151 } /* else exit/term flags weren't set */
3154 * Tell the even loop to stop processing.
3156 if ((flag & RADIUS_SIGNAL_SELF_HUP) != 0) {
3158 static time_t last_hup = 0;
3160 DEBUG("Received HUP signal.");
3163 if ((int) (when - last_hup) < 5) {
3164 radlog(L_INFO, "Ignoring HUP (less than 5s since last one)");
3169 fr_event_loop_exit(el, 0x80);
3173 if ((flag & RADIUS_SIGNAL_SELF_DETAIL) != 0) {
3177 * FIXME: O(N) loops suck.
3179 for (this = mainconfig.listen;
3181 this = this->next) {
3182 if (this->type != RAD_LISTEN_DETAIL) continue;
3185 * This one didn't send the signal, skip
3188 if (!this->decode(this, NULL)) continue;
3191 * Go service the interrupt.
3193 event_poll_detail(this);
3198 if ((flag & RADIUS_SIGNAL_SELF_NEW_FD) != 0) {
3201 for (this = mainconfig.listen;
3203 this = this->next) {
3209 #ifndef WITH_SELF_PIPE
3210 void radius_signal_self(int flag)
3212 handle_signal_self(flag);
3216 * Inform ourselves that we received a signal.
3218 void radius_signal_self(int flag)
3224 * The read MUST be non-blocking for this to work.
3226 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3230 for (i = 0; i < rcode; i++) {
3231 buffer[0] |= buffer[i];
3239 write(self_pipe[1], buffer, 1);
3243 static void event_signal_handler(UNUSED fr_event_list_t *xel,
3244 UNUSED int fd, UNUSED void *ctx)
3249 rcode = read(self_pipe[0], buffer, sizeof(buffer));
3250 if (rcode <= 0) return;
3253 * Merge pending signals.
3255 for (i = 0; i < rcode; i++) {
3256 buffer[0] |= buffer[i];
3259 handle_signal_self(buffer[0]);
3264 static void event_socket_handler(fr_event_list_t *xel, UNUSED int fd,
3267 rad_listen_t *listener = ctx;
3268 RAD_REQUEST_FUNP fun;
3271 rad_assert(xel == el);
3275 if (listener->fd < 0) rad_panic("Socket was closed on us!");
3277 if (!listener->recv(listener, &fun, &request)) return;
3279 if (!thread_pool_addrequest(request, fun)) {
3280 request->child_state = REQUEST_DONE;
3284 typedef struct listen_detail_t {
3289 * This function is called periodically to see if this detail
3290 * file is available for reading.
3292 static void event_poll_detail(void *ctx)
3295 RAD_REQUEST_FUNP fun;
3297 rad_listen_t *this = ctx;
3298 struct timeval when;
3299 listen_detail_t *detail = this->data;
3301 rad_assert(this->type == RAD_LISTEN_DETAIL);
3304 * Try to read something.
3306 * FIXME: This does poll AND receive.
3308 rcode = this->recv(this, &fun, &request);
3310 rad_assert(fun != NULL);
3311 rad_assert(request != NULL);
3313 if (!thread_pool_addrequest(request, fun)) {
3314 request->child_state = REQUEST_DONE;
3318 if (!fr_event_now(el, &now)) gettimeofday(&now, NULL);
3322 * Backdoor API to get the delay until the next poll time.
3324 delay = this->encode(this, NULL);
3325 tv_add(&when, delay);
3327 if (!fr_event_insert(el, event_poll_detail, this,
3328 &when, &detail->ev)) {
3329 radlog(L_ERR, "Failed creating handler");
3335 static void event_status(struct timeval *wake)
3337 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3341 if (debug_flag == 0) {
3343 radlog(L_INFO, "Ready to process requests.");
3344 just_started = FALSE;
3350 DEBUG("Ready to process requests.");
3352 } else if ((wake->tv_sec != 0) ||
3353 (wake->tv_usec >= 100000)) {
3354 DEBUG("Waking up in %d.%01u seconds.",
3355 (int) wake->tv_sec, (unsigned int) wake->tv_usec / 100000);
3360 * FIXME: Put this somewhere else, where it isn't called
3361 * all of the time...
3364 #if !defined(HAVE_PTHREAD_H) && defined(WNOHANG)
3366 * If there are no child threads, then there may
3367 * be child processes. In that case, wait for
3368 * their exit status, and throw that exit status
3369 * away. This helps get rid of zxombie children.
3371 while (waitpid(-1, &argval, WNOHANG) > 0) {
3379 * Externally-visibly functions.
3381 int radius_event_init(CONF_SECTION *cs, int spawn_flag)
3383 rad_listen_t *this, *head = NULL;
3387 time(&fr_start_time);
3389 el = fr_event_list_create(event_status);
3392 pl = fr_packet_list_create(0);
3393 if (!pl) return 0; /* leak el */
3395 request_num_counter = 0;
3398 * Move all of the thread calls to this file?
3400 * It may be best for the mutexes to be in this file...
3402 have_children = spawn_flag;
3405 if (mainconfig.proxy_requests) {
3407 * Create the tree for managing proxied requests and
3410 proxy_list = fr_packet_list_create(1);
3411 if (!proxy_list) return 0;
3413 #ifdef HAVE_PTHREAD_H
3414 if (pthread_mutex_init(&proxy_mutex, NULL) != 0) {
3415 radlog(L_ERR, "FATAL: Failed to initialize proxy mutex: %s",
3424 * Just before we spawn the child threads, force the log
3425 * subsystem to re-open the log file for every write.
3427 if (spawn_flag) force_log_reopen();
3429 #ifdef HAVE_PTHREAD_H
3431 NO_SUCH_CHILD_PID = (pthread_t ) (0);
3433 NO_SUCH_CHILD_PID = pthread_self(); /* not a child thread */
3435 if (thread_pool_init(cs, spawn_flag) < 0) {
3441 DEBUG("%s: #### Skipping IP addresses and Ports ####",
3446 #ifdef WITH_SELF_PIPE
3448 * Child threads need a pipe to signal us, as do the
3451 if (pipe(self_pipe) < 0) {
3452 radlog(L_ERR, "radiusd: Error opening internal pipe: %s",
3456 if (fcntl(self_pipe[0], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3457 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3461 if (fcntl(self_pipe[1], F_SETFL, O_NONBLOCK | FD_CLOEXEC) < 0) {
3462 radlog(L_ERR, "radiusd: Error setting internal flags: %s",
3467 if (!fr_event_fd_insert(el, 0, self_pipe[0],
3468 event_signal_handler, el)) {
3469 radlog(L_ERR, "Failed creating handler for signals");
3472 #endif /* WITH_SELF_PIPE */
3476 * Mark the proxy Fd's as unused.
3481 for (i = 0; i < 32; i++) proxy_fds[i] = -1;
3485 DEBUG("%s: #### Opening IP addresses and Ports ####",
3489 * The server temporarily switches to an unprivileged
3490 * user very early in the bootstrapping process.
3491 * However, some sockets MAY require privileged access
3492 * (bind to device, or to port < 1024, or to raw
3493 * sockets). Those sockets need to call suid up/down
3494 * themselves around the functions that need a privileged
3497 if (listen_init(cs, &head) < 0) {
3502 * At this point, no one has any business *ever* going
3505 fr_suid_down_permanent();
3508 * Add all of the sockets to the event loop.
3512 this = this->next) {
3515 this->print(this, buffer, sizeof(buffer));
3517 switch (this->type) {
3519 case RAD_LISTEN_DETAIL:
3520 DEBUG("Listening on %s", buffer);
3523 * Detail files are always known, and aren't
3524 * put into the socket event loop.
3526 this->status = RAD_LISTEN_STATUS_KNOWN;
3529 * Set up the first poll interval.
3531 event_poll_detail(this);
3536 case RAD_LISTEN_PROXY:
3537 rad_assert(proxy_fds[this->fd & 0x1f] == -1);
3538 rad_assert(proxy_listeners[this->fd & 0x1f] == NULL);
3540 proxy_fds[this->fd & 0x1f] = this->fd;
3541 proxy_listeners[this->fd & 0x1f] = this;
3542 if (!fr_packet_list_socket_add(proxy_list,
3556 mainconfig.listen = head;
3562 static int request_hash_cb(UNUSED void *ctx, void *data)
3564 REQUEST *request = fr_packet2myptr(REQUEST, packet, data);
3567 rad_assert(request->in_proxy_hash == FALSE);
3570 ev_request_free(&request);
3577 static int proxy_hash_cb(UNUSED void *ctx, void *data)
3579 REQUEST *request = fr_packet2myptr(REQUEST, proxy, data);
3581 ev_request_free(&request);
3587 void radius_event_free(void)
3590 * FIXME: Stop all threads, or at least check that
3591 * they're all waiting on the semaphore, and the queues
3597 * There are requests in the proxy hash that aren't
3598 * referenced from anywhere else. Remove them first.
3601 PTHREAD_MUTEX_LOCK(&proxy_mutex);
3602 fr_packet_list_walk(proxy_list, NULL, proxy_hash_cb);
3603 PTHREAD_MUTEX_UNLOCK(&proxy_mutex);
3604 fr_packet_list_free(proxy_list);
3609 fr_packet_list_walk(pl, NULL, request_hash_cb);
3611 fr_packet_list_free(pl);
3614 fr_event_list_free(el);
3617 int radius_event_process(void)
3621 return fr_event_loop(el);
3624 void radius_handle_request(REQUEST *request, RAD_REQUEST_FUNP fun)
3626 request->options = RAD_REQUEST_OPTION_DEBUG2;
3628 if (request_pre_handler(request)) {
3629 rad_assert(fun != NULL);
3630 rad_assert(request != NULL);
3632 if (request->server) RDEBUG("server %s {",
3633 request->server != NULL ?
3634 request->server : "");
3637 if (request->server) RDEBUG("} # server %s",
3638 request->server != NULL ?
3639 request->server : "");
3641 request_post_handler(request);
3644 DEBUG2("Going to the next request");