2 * Copyright (c) 2016, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of JANET(UK) nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
31 * OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include <event2/event.h>
50 #include <trp_route.h>
51 #include <trp_internal.h>
53 #include <trp_ptable.h>
54 #include <trp_rtable.h>
55 #include <tr_config.h>
61 /* data for event callbacks */
62 struct tr_trps_event_cookie {
68 /* callback to schedule event to process messages */
69 static void tr_trps_mq_cb(TR_MQ *mq, void *arg)
71 struct event *mq_ev=(struct event *)arg;
72 event_active(mq_ev, 0, 0);
75 static void msg_free_helper(void *p)
77 tr_msg_free_decoded((TR_MSG *)p);
80 static void tr_free_name_helper(void *arg)
82 tr_free_name((TR_NAME *)arg);
85 /* takes a TR_MSG and puts it in a TR_MQ_MSG for processing by the main thread */
86 static TRP_RC tr_trps_msg_handler(TRPS_INSTANCE *trps,
90 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
91 TR_MQ_MSG *mq_msg=NULL;
93 /* n.b., conn is available here, but do not hold onto the reference
94 * because it may be cleaned up if the originating connection goes
95 * down before the message is processed */
96 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_MSG_RECEIVED, TR_MQ_PRIO_NORMAL);
100 tr_mq_msg_set_payload(mq_msg, (void *)tr_msg, msg_free_helper);
101 trps_mq_add(trps, mq_msg);
102 talloc_free(tmp_ctx); /* cleans up the message if it did not get appended correctly */
107 static int tr_trps_gss_handler(gss_name_t client_name, gss_buffer_t gss_name,
110 struct tr_trps_event_cookie *cookie=(struct tr_trps_event_cookie *)cookie_in;
111 TRPS_INSTANCE *trps = cookie->trps;
112 TR_CFG_MGR *cfg_mgr = cookie->cfg_mgr;
113 TR_NAME name={gss_name->value, gss_name->length};
115 tr_debug("tr_trps_gss_handler()");
117 if ((!client_name) || (!gss_name) || (!trps) || (!cfg_mgr)) {
118 tr_debug("tr_trps_gss_handler: Bad parameters.");
122 /* look up the TRPS peer matching the GSS name */
123 if (NULL==trps_get_peer_by_gssname(trps, &name)) {
124 tr_warning("tr_trps_gss_handler: Connection attempt from unknown peer (GSS name: %.*s).", name.len, name.buf);
128 tr_debug("Client's GSS Name: %.*s", name.len, name.buf);
132 /* data passed to thread */
133 struct trps_thread_data {
134 TRP_CONNECTION *conn;
137 /* thread to handle GSS connections from peers */
138 static void *tr_trps_thread(void *arg)
140 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
141 struct trps_thread_data *thread_data=talloc_get_type_abort(arg, struct trps_thread_data);
142 TRP_CONNECTION *conn=thread_data->conn;
143 TRPS_INSTANCE *trps=thread_data->trps;
146 tr_debug("tr_trps_thread: started");
147 if (trps_authorize_connection(trps, conn)!=TRP_SUCCESS)
150 msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPS_CONNECTED, TR_MQ_PRIO_HIGH);
151 tr_mq_msg_set_payload(msg, (void *)tr_dup_name(trp_connection_get_peer(conn)), tr_free_name_helper);
153 tr_err("tr_trps_thread: error allocating TR_MQ_MSG");
156 trps_mq_add(trps, msg); /* steals msg context */
159 trps_handle_connection(trps, conn);
162 msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPS_DISCONNECTED, TR_MQ_PRIO_HIGH);
163 tr_mq_msg_set_payload(msg, (void *)conn, NULL); /* do not pass a free routine */
165 tr_err("tr_trps_thread: error allocating TR_MQ_MSG");
167 trps_mq_add(trps, msg);
168 tr_debug("tr_trps_thread: exit");
169 talloc_free(tmp_ctx);
173 /* called when a connection to the TRPS port is received */
174 static void tr_trps_event_cb(int listener, short event, void *arg)
176 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
177 TRPS_INSTANCE *trps = talloc_get_type_abort(arg, TRPS_INSTANCE); /* aborts on wrong type */
178 TRP_CONNECTION *conn=NULL;
179 TR_NAME *gssname=NULL;
181 struct trps_thread_data *thread_data=NULL;
183 if (0==(event & EV_READ)) {
184 tr_debug("tr_trps_event_cb: unexpected event on TRPS socket (event=0x%X)", event);
186 /* create a thread to handle this connection */
187 name = talloc_asprintf(tmp_ctx, "trustrouter@%s", trps->hostname);
190 gssname=tr_new_name(name); /* name cleaned up with tmp_ctx but need to handl gssname ourselves */
192 conn=trp_connection_accept(tmp_ctx, listener, gssname); /* steals gssname unless it fails */
194 tr_free_name(gssname);
196 /* need to monitor this fd and trigger events when read becomes possible */
197 thread_data=talloc(conn, struct trps_thread_data);
198 if (thread_data==NULL) {
199 tr_err("tr_trps_event_cb: unable to allocate trps_thread_data");
202 thread_data->conn=conn;
203 thread_data->trps=trps;
204 trps_add_connection(trps, conn); /* remember the connection - this puts conn and the thread data in trps's talloc context */
205 pthread_create(trp_connection_get_thread(conn), NULL, tr_trps_thread, thread_data);
210 talloc_free(tmp_ctx);
213 static void tr_trps_cleanup_conn(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
215 /* everything belonging to the thread is in the TRP_CONNECTION
216 * associated with it */
217 tr_debug("tr_trps_cleanup_conn: freeing %p", conn);
218 pthread_join(*trp_connection_get_thread(conn), NULL);
219 trps_remove_connection(trps, conn);
220 trp_connection_free(conn);
221 tr_debug("tr_trps_cleanup_conn: deleted connection");
224 static void tr_trps_cleanup_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
228 /* tell the trpc thread to exit */
229 msg = tr_mq_msg_new(NULL, TR_MQMSG_TRPC_EXIT_OK, TR_MQ_PRIO_NORMAL);
231 tr_debug("tr_trps_cleanup_trpc: Notifying thread that it may now exit");
232 trpc_mq_add(trpc, msg);
234 tr_crit("tr_trps_cleanup_trpc: Unable to acknowledge disconnection, thread will probably never terminate");
237 pthread_join(*trp_connection_get_thread(trpc_get_conn(trpc)), NULL);
238 trps_remove_trpc(trps, trpc);
240 tr_debug("tr_trps_cleanup_trpc: deleted connection");
244 * Get a dynamically allocated string with a description of the route table.
245 * Caller must free the string using talloc_free().
247 * @param memctx talloc context for the string
248 * @param trps trps instance containing the route table
249 * @return pointer to the output, or NULL on error
251 static char *tr_trps_route_table_to_str(TALLOC_CTX *memctx, TRPS_INSTANCE *trps)
253 return trp_rtable_to_str(memctx, trps->rtable, " | ", NULL);
257 * Get a dynamically allocated string with a description of the community table.
258 * Caller must free the string using talloc_free().
260 * @param memctx talloc context for the string
261 * @param trps trps instance containing the community table
262 * @return pointer to the output, or NULL on error
264 static char *tr_trps_comm_table_to_str(TALLOC_CTX *memctx, TRPS_INSTANCE *trps)
266 return tr_comm_table_to_str(memctx, trps->ctable);
270 * Event handler to process TRP messages from connection threads. These
271 * are added to the message queue (mq) in tr_trps_msg_handler(), which
272 * runs in the other threads.
274 * @param socket Ignored
275 * @param event Ignored
276 * @param arg Pointer to the TRPS_INSTANCE
278 static void tr_trps_process_mq(int socket, short event, void *arg)
280 TRPS_INSTANCE *trps=talloc_get_type_abort(arg, TRPS_INSTANCE);
283 TRP_PEER *peer = NULL;
286 msg=trps_mq_pop(trps);
288 s=tr_mq_msg_get_message(msg);
289 if (0==strcmp(s, TR_MQMSG_TRPS_CONNECTED)) {
290 TR_NAME *peer_gssname=(TR_NAME *)tr_mq_msg_get_payload(msg);
291 peer=trps_get_peer_by_gssname(trps, peer_gssname); /* get the peer record */
292 tmp = tr_name_strdup(peer_gssname); /* get the name as a null-terminated string */
294 tr_err("tr_trps_process_mq: incoming connection from unknown peer (%s) reported.", tmp);
296 trp_peer_set_incoming_status(peer, PEER_CONNECTED);
297 tr_err("tr_trps_process_mq: incoming connection from %s established.", tmp);
301 else if (0==strcmp(s, TR_MQMSG_TRPS_DISCONNECTED)) {
302 TRP_CONNECTION *conn=talloc_get_type_abort(tr_mq_msg_get_payload(msg), TRP_CONNECTION);
303 TR_NAME *peer_gssname=trp_connection_get_peer(conn);
304 peer=trps_get_peer_by_gssname(trps, peer_gssname); /* get the peer record */
305 tmp = tr_name_strdup(peer_gssname); /* get the name as a null-terminated string */
307 tr_err("tr_trps_process_mq: incoming connection from unknown peer (%.*s) lost.", tmp);
309 trp_peer_set_incoming_status(peer, PEER_DISCONNECTED);
310 tr_trps_cleanup_conn(trps, conn);
311 tr_err("tr_trps_process_mq: incoming connection from %s lost.", tmp);
315 else if (0==strcmp(s, TR_MQMSG_TRPC_CONNECTED)) {
316 TR_NAME *svcname=(TR_NAME *)tr_mq_msg_get_payload(msg);
317 peer=trps_get_peer_by_servicename(trps, svcname);
318 tmp = tr_name_strdup(svcname);
320 tr_err("tr_trps_process_mq: outgoing connection to unknown peer (%s) reported.", tmp);
322 trp_peer_set_outgoing_status(peer, PEER_CONNECTED);
323 tr_err("tr_trps_process_mq: outgoing connection to %s established.", tmp);
327 else if (0==strcmp(s, TR_MQMSG_TRPC_DISCONNECTED)) {
328 /* The trpc connection died - see note above tr_trpc_thread() regarding the shutdown protocol.
329 * The EXIT_OK message is sent in tr_trps_cleanup_trpc(). */
330 TRPC_INSTANCE *trpc=talloc_get_type_abort(tr_mq_msg_get_payload(msg), TRPC_INSTANCE);
331 TR_NAME *svcname=trpc_get_gssname(trpc);
332 peer=trps_get_peer_by_servicename(trps, svcname);
333 tmp = tr_name_strdup(svcname);
335 tr_err("tr_trps_process_mq: outgoing connection to unknown peer (%s) lost.", tmp);
337 trp_peer_set_outgoing_status(peer, PEER_DISCONNECTED);
338 tr_err("tr_trps_process_mq: outgoing connection to %s lost.", tmp);
339 tr_trps_cleanup_trpc(trps, trpc);
344 else if (0==strcmp(s, TR_MQMSG_MSG_RECEIVED)) {
345 if (trps_handle_tr_msg(trps, tr_mq_msg_get_payload(msg))!=TRP_SUCCESS)
346 tr_notice("tr_trps_process_mq: error handling message.");
349 tr_notice("tr_trps_process_mq: unknown message '%s' received.", tr_mq_msg_get_message(msg));
352 msg=trps_mq_pop(trps);
356 static void tr_trps_update(int listener, short event, void *arg)
358 struct tr_trps_event_cookie *cookie=talloc_get_type_abort(arg, struct tr_trps_event_cookie);
359 TRPS_INSTANCE *trps=cookie->trps;
360 struct event *ev=cookie->ev;
362 tr_debug("tr_trps_update: sending scheduled route/community updates.");
363 trps_update(trps, TRP_UPDATE_SCHEDULED);
364 event_add(ev, &(trps->update_interval));
365 tr_debug("tr_trps_update: update interval=%d", trps->update_interval.tv_sec);
368 static void tr_trps_sweep(int listener, short event, void *arg)
370 struct tr_trps_event_cookie *cookie=talloc_get_type_abort(arg, struct tr_trps_event_cookie);
371 TRPS_INSTANCE *trps=cookie->trps;
372 struct event *ev=cookie->ev;
373 char *table_str=NULL;
375 tr_debug("tr_trps_sweep: sweeping routes.");
376 trps_sweep_routes(trps);
377 tr_debug("tr_trps_sweep: sweeping communities.");
378 trps_sweep_ctable(trps);
379 table_str=tr_trps_route_table_to_str(NULL, trps);
380 if (table_str!=NULL) {
382 talloc_free(table_str);
385 table_str=tr_trps_comm_table_to_str(NULL, trps);
386 if (table_str!=NULL) {
388 talloc_free(table_str);
390 /* schedule the event to run again */
391 event_add(ev, &(trps->sweep_interval));
394 static void tr_connection_update(int listener, short event, void *arg)
396 struct tr_trps_event_cookie *cookie=talloc_get_type_abort(arg, struct tr_trps_event_cookie);
397 TRPS_INSTANCE *trps=cookie->trps;
398 struct event *ev=cookie->ev;
400 tr_debug("tr_connection_update: checking peer connections.");
401 tr_connect_to_peers(trps, ev);
402 /* schedule the event to run again */
403 event_add(ev, &(trps->connect_interval));
406 static int tr_trps_events_destructor(void *obj)
408 TR_TRPS_EVENTS *ev=talloc_get_type_abort(obj, TR_TRPS_EVENTS);
410 event_free(ev->mq_ev);
411 if (ev->connect_ev!=NULL)
412 event_free(ev->connect_ev);
413 if (ev->update_ev!=NULL)
414 event_free(ev->update_ev);
415 if (ev->sweep_ev!=NULL)
416 event_free(ev->sweep_ev);
419 static TR_TRPS_EVENTS *tr_trps_events_new(TALLOC_CTX *mem_ctx)
421 TR_TRPS_EVENTS *ev=talloc(mem_ctx, TR_TRPS_EVENTS);
423 ev->listen_ev=talloc(ev, struct tr_socket_event);
428 if (ev->listen_ev==NULL) {
432 talloc_set_destructor((void *)ev, tr_trps_events_destructor);
438 static void tr_trps_events_free(TR_TRPS_EVENTS *ev)
443 /* Configure the trps instance and set up its event handler.
444 * Fills in trps_ev, which should be allocated by caller. */
445 TRP_RC tr_trps_event_init(struct event_base *base, TR_INSTANCE *tr)
447 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
448 struct tr_socket_event *listen_ev=NULL;
449 struct tr_trps_event_cookie *trps_cookie=NULL;
450 struct tr_trps_event_cookie *connection_cookie=NULL;
451 struct tr_trps_event_cookie *update_cookie=NULL;
452 struct tr_trps_event_cookie *sweep_cookie=NULL;
453 struct timeval zero_time={0,0};
454 TRP_RC retval=TRP_ERROR;
457 if (tr->events != NULL) {
458 tr_notice("tr_trps_event_init: tr->events was not null. Freeing before reallocating..");
459 tr_trps_events_free(tr->events);
462 tr->events=tr_trps_events_new(tmp_ctx);
463 if (tr->events == NULL) {
464 tr_debug("tr_trps_event_init: unable to allocate event handles.");
469 /* get convenient handles */
470 listen_ev=tr->events->listen_ev;
472 /* Create the cookie for callbacks. It will end up part of the trps context, so it will
473 * be cleaned up when trps is freed by talloc_free. */
474 trps_cookie=talloc(tr->events, struct tr_trps_event_cookie);
475 if (trps_cookie == NULL) {
476 tr_debug("tr_trps_event_init: Unable to allocate trps_cookie.");
478 tr_trps_events_free(tr->events);
482 trps_cookie->trps=tr->trps;
483 trps_cookie->cfg_mgr=tr->cfg_mgr;
485 /* get a trps listener */
486 listen_ev->n_sock_fd=trps_get_listener(tr->trps,
489 tr->cfg_mgr->active->internal->hostname,
490 tr->cfg_mgr->active->internal->trps_port,
494 if (listen_ev->n_sock_fd==0) {
495 tr_crit("Error opening TRP server socket.");
497 tr_trps_events_free(tr->events);
502 /* Set up events for the sockets */
503 for (ii=0; ii<listen_ev->n_sock_fd; ii++) {
504 listen_ev->ev[ii]=event_new(base,
505 listen_ev->sock_fd[ii],
509 event_add(listen_ev->ev[ii], NULL);
512 /* now set up message queue processing event, only triggered by
514 tr->events->mq_ev=event_new(base,
519 tr_mq_set_notify_cb(tr->trps->mq, tr_trps_mq_cb, tr->events->mq_ev);
521 /* now set up the peer connection timer event */
522 connection_cookie=talloc(tr->events, struct tr_trps_event_cookie);
523 if (connection_cookie == NULL) {
524 tr_debug("tr_trps_event_init: Unable to allocate connection_cookie.");
526 tr_trps_events_free(tr->events);
530 connection_cookie->trps=tr->trps;
531 connection_cookie->cfg_mgr=tr->cfg_mgr;
532 tr->events->connect_ev=event_new(base, -1, EV_TIMEOUT, tr_connection_update, (void *)connection_cookie);
533 connection_cookie->ev=tr->events->connect_ev; /* in case it needs to frob the event */
534 /* The first time, do this immediately. Thereafter, it will retrigger every trps->connect_interval */
535 event_add(tr->events->connect_ev, &zero_time);
537 /* now set up the route update timer event */
538 update_cookie=talloc(tr->events, struct tr_trps_event_cookie);
539 if (update_cookie == NULL) {
540 tr_debug("tr_trps_event_init: Unable to allocate update_cookie.");
542 tr_trps_events_free(tr->events);
546 update_cookie->trps=tr->trps;
547 update_cookie->cfg_mgr=tr->cfg_mgr;
548 tr->events->update_ev=event_new(base, -1, EV_TIMEOUT, tr_trps_update, (void *)update_cookie);
549 update_cookie->ev=tr->events->update_ev; /* in case it needs to frob the event */
550 event_add(tr->events->update_ev, &(tr->trps->update_interval));
552 /* now set up the route table sweep timer event */
553 sweep_cookie=talloc(tr->events, struct tr_trps_event_cookie);
554 if (sweep_cookie == NULL) {
555 tr_debug("tr_trps_event_init: Unable to allocate sweep_cookie.");
557 tr_trps_events_free(tr->events);
561 sweep_cookie->trps=tr->trps;
562 sweep_cookie->cfg_mgr=tr->cfg_mgr;
563 tr->events->sweep_ev=event_new(base, -1, EV_TIMEOUT, tr_trps_sweep, (void *)sweep_cookie);
564 sweep_cookie->ev=tr->events->sweep_ev; /* in case it needs to frob the event */
565 event_add(tr->events->sweep_ev, &(tr->trps->sweep_interval));
567 talloc_steal(tr, tr->events);
571 talloc_free(tmp_ctx);
576 struct trpc_notify_cb_data {
579 pthread_mutex_t mutex;
582 static void tr_trpc_mq_cb(TR_MQ *mq, void *arg)
584 struct trpc_notify_cb_data *cb_data=(struct trpc_notify_cb_data *) arg;
585 pthread_mutex_lock(&(cb_data->mutex));
586 if (!cb_data->msg_ready) {
587 cb_data->msg_ready=1;
588 pthread_cond_signal(&(cb_data->cond));
590 pthread_mutex_unlock(&(cb_data->mutex));
593 /* data passed to thread */
594 struct trpc_thread_data {
600 * Returns when a message is ready
602 static void trpc_thread_wait_for_message(struct trpc_notify_cb_data *cb)
606 pthread_cond_wait(&(cb->cond), &(cb->mutex));
607 while (!cb->msg_ready);
611 * Thread for handling TRPC (outgoing) connections
615 * This thread uses a mutex and condition variable to wait for incoming messages
616 * on its queue. The main thread interacts with these through the tr_trpc_mq_cb()
617 * callback. This callback is called by the TR_MQ whenever the queue goes from empty
618 * to non-empty. The callback locks the thread's mutex, then sets a msg_ready flag
619 * signals the condition variable, then unlocks the mutex.
621 * This thread waits for the condition variable to be signaled, then checks that the
622 * msg_ready flag has actually been set (pthreads does not guarantee against false
623 * wakes). If so, it holds the mutex lock while reading any messages in its queue and
624 * sending responses over the GSS connection. If it receives an ABORT message from
625 * the main thread (not currently used), or if sending the GSS message fails (which
626 * usually indicates that the connection has been lost), the thread begins the shutdown
627 * process. It still holds the mutex lock at the start of this process.
629 * This begins by setting trpc->shutting_down = 1, then sending a message to the
630 * TRPS (main) thread indicating that it has DISCONNECTED. It then releases the mutex
631 * and waits for more messages, again using the mutex and the condition variable. It
632 * ignores any except for an EXIT_OK message. When that is received, it exits, terminating
635 * When the main thread receives the DISCONNECTED message, it must stop sending messages
636 * to this thread's message queue. When it is certain that it will not queue any more messages,
637 * it sends the EXIT_OK message as its last interaction with this thread. Once that message
638 * has been queued, queueing additional messages may result in deadlock or segfaults.
639 * (It is ok if there are other messages in the queue, but it must not queue more.)
641 static void *tr_trpc_thread(void *arg)
643 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
644 struct trpc_thread_data *thread_data=talloc_get_type_abort(arg, struct trpc_thread_data);
645 TRPC_INSTANCE *trpc=thread_data->trpc;
646 TRPS_INSTANCE *trps=thread_data->trps;
649 const char *msg_type=NULL;
650 char *encoded_msg=NULL;
651 TR_NAME *peer_gssname=NULL;
656 struct trpc_notify_cb_data cb_data={0,
657 PTHREAD_COND_INITIALIZER,
658 PTHREAD_MUTEX_INITIALIZER};
660 tr_debug("tr_trpc_thread: started");
662 /* set up the mq for receiving */
663 pthread_mutex_lock(&(cb_data.mutex)); /* hold this lock until we enter the main loop */
665 tr_mq_lock(trpc->mq);
666 tr_mq_set_notify_cb(trpc->mq, tr_trpc_mq_cb, (void *) &cb_data);
667 tr_mq_unlock(trpc->mq);
669 rc=trpc_connect(trpc);
670 if (rc!=TRP_SUCCESS) {
671 tr_notice("tr_trpc_thread: failed to initiate connection to %s:%d.",
672 trpc_get_server(trpc),
673 trpc_get_port(trpc));
675 peer_gssname=trp_connection_get_peer(trpc_get_conn(trpc));
676 if (peer_gssname==NULL) {
677 tr_err("tr_trpc_thread: could not duplicate peer_gssname.");
678 talloc_free(tmp_ctx);
681 tr_debug("tr_trpc_thread: connected to peer %s", peer_gssname->buf);
683 msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_CONNECTED, TR_MQ_PRIO_HIGH);
684 tr_mq_msg_set_payload(msg, (void *)tr_dup_name(peer_gssname), tr_free_name_helper);
686 tr_err("tr_trpc_thread: error allocating TR_MQ_MSG");
687 talloc_free(tmp_ctx);
690 trps_mq_add(trps, msg); /* steals msg context */
694 trpc_thread_wait_for_message(&cb_data); /* handles locking */
696 n_popped = 0; /* have not popped any messages from the queue */
697 n_sent = 0; /* have not sent any messages yet */
698 for (msg = trpc_mq_pop(trpc);
700 msg = trpc_mq_pop(trpc)) {
702 msg_type = tr_mq_msg_get_message(msg);
703 if (0 == strcmp(msg_type, TR_MQMSG_ABORT)) {
706 } else if (0 == strcmp(msg_type, TR_MQMSG_TRPC_SEND)) {
707 encoded_msg = tr_mq_msg_get_payload(msg);
708 if (encoded_msg == NULL)
709 tr_notice("tr_trpc_thread: null outgoing TRP message.");
711 rc = trpc_send_msg(trpc, encoded_msg);
712 if (rc == TRP_SUCCESS) {
715 tr_notice("tr_trpc_thread: trpc_send_msg failed.");
716 /* Assume this means we lost the connection. */
722 tr_notice("tr_trpc_thread: unknown message '%s' received.", msg_type);
727 /* if n_popped == 0, then n_sent must be zero (it's only set after at
728 * least one msg is popped) */
730 tr_err("tr_trpc_thread: notified of message, but queue empty");
732 tr_debug("tr_trpc_thread: sent %d messages.", n_sent);
736 tr_debug("tr_trpc_thread: Disconnected. Waiting to terminate thread.");
737 trpc->shutting_down = 1;
739 /* Send a DISCONNECTED message to the main thread */
740 msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_DISCONNECTED, TR_MQ_PRIO_NORMAL);
741 tr_mq_msg_set_payload(msg, (void *)trpc, NULL); /* do not pass a free routine */
743 /* can't notify main thread of exit - just do it and hope for the best */
744 tr_err("tr_trpc_thread: error allocating TR_MQ_MSG");
746 trps_mq_add(trps, msg);
748 /* DISCONNECTED sent, now wait for an acknowledgement before exiting */
751 trpc_thread_wait_for_message(&cb_data);
753 while (NULL != (msg = trpc_mq_pop(trpc))) {
754 msg_type = tr_mq_msg_get_message(msg);
756 /* ignore anything except an EXIT_OK */
757 if (0 == strcmp(msg_type, TR_MQMSG_TRPC_EXIT_OK)) {
759 break; /* skip any further messages */
765 tr_debug("tr_trpc_thread: thread terminating.");
766 talloc_free(tmp_ctx);
770 /* convert an IDP realm into routing table entries. Outputs number in *n_routes */
771 static TRP_ROUTE **tr_make_local_routes(TALLOC_CTX *mem_ctx,
776 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
778 TRP_ROUTE *new_entry=NULL;
779 TRP_ROUTE **entries=NULL;
780 size_t n_comms=0, ii=0;
784 if ((realm==NULL) || (realm->origin!=TR_REALM_LOCAL))
788 for (comm=realm->apcs, n_comms=0; comm!=NULL; comm=comm->next,n_comms++) {}
790 entries=talloc_array(tmp_ctx, TRP_ROUTE *, n_comms);
791 for (comm=realm->apcs,ii=0; comm!=NULL; comm=comm->next, ii++) {
792 new_entry=trp_route_new(entries);
793 if (new_entry==NULL) {
794 tr_crit("tr_make_local_routes: unable to allocate entry.");
795 talloc_free(entries);
798 trp_route_set_comm(new_entry, tr_dup_name(comm->id));
799 trp_route_set_realm(new_entry, tr_dup_name(realm->realm_id));
800 trp_route_set_peer(new_entry, tr_new_name("")); /* no peer, it's us */
801 trp_route_set_metric(new_entry, 0);
802 trp_route_set_trust_router(new_entry, tr_new_name(trust_router));
803 trp_route_set_next_hop(new_entry, tr_new_name(""));
804 trp_route_set_local(new_entry, 1);
805 entries[ii]=new_entry;
808 talloc_steal(mem_ctx, entries);
811 talloc_free(tmp_ctx);
815 void tr_peer_status_change(TRP_PEER *peer, void *cookie)
817 TRPS_INSTANCE *trps=talloc_get_type_abort(cookie, TRPS_INSTANCE);
819 if (TRP_SUCCESS!=trps_wildcard_route_req(trps, trp_peer_get_servicename(peer)))
820 tr_err("tr_send_wildcard: error sending wildcard route request.");
823 /* starts a trpc thread to connect to server:port */
824 TRP_RC tr_trpc_initiate(TRPS_INSTANCE *trps, TRP_PEER *peer, struct event *ev)
826 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
827 TRPC_INSTANCE *trpc=NULL;
828 TRP_CONNECTION *conn=NULL;
829 struct trpc_thread_data *thread_data=NULL;
832 tr_debug("tr_trpc_initiate entered");
833 trpc=trpc_new(tmp_ctx);
835 tr_crit("tr_trpc_initiate: could not allocate TRPC_INSTANCE.");
839 tr_debug("tr_trpc_initiate: allocated trpc");
841 conn=trp_connection_new(trpc);
843 tr_crit("tr_trpc_initiate: could not allocate TRP_CONNECTION.");
848 trpc_set_conn(trpc, conn);
849 trpc_set_server(trpc, talloc_strdup(trpc, trp_peer_get_server(peer)));
850 trpc_set_port(trpc, trp_peer_get_port(peer));
851 trpc_set_gssname(trpc, trp_peer_dup_servicename(peer));
852 tr_debug("tr_trpc_initiate: allocated connection");
855 thread_data=talloc(trpc, struct trpc_thread_data);
856 if (thread_data==NULL) {
857 tr_crit("tr_trpc_initiate: could not allocate struct trpc_thread_data.");
861 thread_data->trpc=trpc;
862 thread_data->trps=trps;
864 trps_add_trpc(trps, trpc); /* must add before starting thread */
865 pthread_create(trp_connection_get_thread(conn), NULL, tr_trpc_thread, thread_data);
867 tr_debug("tr_trpc_initiate: started trpc thread");
871 talloc_free(tmp_ctx);
875 /* Add local routes to the route table. */
876 TRP_RC tr_add_local_routes(TRPS_INSTANCE *trps, TR_CFG *cfg)
878 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
879 TR_IDP_REALM *cur=NULL;
880 TRP_ROUTE **local_routes=NULL;
883 char *trust_router_name=talloc_asprintf(tmp_ctx, "%s:%d", cfg->internal->hostname, cfg->internal->trps_port);
885 /* determine our trust router name */
886 if (trust_router_name==NULL)
889 for (cur=cfg->ctable->idp_realms; cur!=NULL; cur=cur->next) {
890 local_routes=tr_make_local_routes(tmp_ctx, cur, trust_router_name, &n_routes);
891 for (ii=0; ii<n_routes; ii++)
892 trps_add_route(trps, local_routes[ii]);
894 talloc_free(local_routes);
899 talloc_free(tmp_ctx);
903 /* decide how often to attempt to connect to a peer */
904 static int tr_conn_attempt_due(TRPS_INSTANCE *trps, TRP_PEER *peer, struct timespec *when)
906 return 1; /* currently make an attempt every cycle */
909 /* open missing connections to peers */
910 TRP_RC tr_connect_to_peers(TRPS_INSTANCE *trps, struct event *ev)
912 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
913 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
915 struct timespec curtime={0,0};
918 if (clock_gettime(CLOCK_REALTIME, &curtime)) {
919 tr_err("tr_connect_to_peers: failed to read time.");
924 for (peer=trp_ptable_iter_first(iter, trps->ptable);
926 peer=trp_ptable_iter_next(iter))
928 if (trps_find_trpc(trps, peer)==NULL) {
929 TR_NAME *label=trp_peer_get_label(peer);
930 tr_debug("tr_connect_to_peers: %.*s missing connection.",
931 label->len, label->buf);
932 /* has it been long enough since we last tried? */
933 if (tr_conn_attempt_due(trps, peer, &curtime)) {
934 trp_peer_set_last_conn_attempt(peer, &curtime); /* we are trying again now */
935 if (tr_trpc_initiate(trps, peer, ev)!=TRP_SUCCESS) {
936 tr_err("tr_connect_to_peers: unable to initiate TRP connection to %s:%u.",
937 trp_peer_get_server(peer),
938 trp_peer_get_port(peer));
946 trp_ptable_iter_free(iter);
947 talloc_free(tmp_ctx);
952 /* Called by the config manager after a change to the active configuration.
953 * Updates configuration of objects that do not know about the config manager. */
954 void tr_config_changed(TR_CFG *new_cfg, void *cookie)
956 TR_INSTANCE *tr=talloc_get_type_abort(cookie, TR_INSTANCE);
957 TRPS_INSTANCE *trps=tr->trps;
958 char *table_str=NULL;
960 tr->cfgwatch->poll_interval.tv_sec=new_cfg->internal->cfg_poll_interval;
961 tr->cfgwatch->poll_interval.tv_usec=0;
963 tr->cfgwatch->settling_time.tv_sec=new_cfg->internal->cfg_settling_time;
964 tr->cfgwatch->settling_time.tv_usec=0;
966 /* These need to be updated */
967 tr->tids->hostname = new_cfg->internal->hostname;
968 tr->mons->hostname = new_cfg->internal->hostname;
970 /* Update the authorized monitoring gss names */
971 if (tr->mons->authorized_gss_names) {
972 tr_debug("tr_config_changed: freeing tr->mons->authorized_gss_names");
973 tr_gss_names_free(tr->mons->authorized_gss_names);
975 tr->mons->authorized_gss_names = tr_gss_names_dup(tr->mons, new_cfg->internal->monitoring_credentials);
976 if (tr->mons->authorized_gss_names == NULL) {
977 tr_err("tr_config_changed: Error configuring monitoring credentials");
980 trps_set_connect_interval(trps, new_cfg->internal->trp_connect_interval);
981 trps_set_update_interval(trps, new_cfg->internal->trp_update_interval);
982 trps_set_sweep_interval(trps, new_cfg->internal->trp_sweep_interval);
983 trps_set_ctable(trps, new_cfg->ctable);
984 trps_set_ptable(trps, new_cfg->peers);
985 trps_set_peer_status_callback(trps, tr_peer_status_change, (void *)trps);
986 trps_clear_rtable(trps); /* should we do this every time??? */
987 tr_add_local_routes(trps, new_cfg); /* should we do this every time??? */
988 trps_update_active_routes(trps); /* find new routes */
989 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
990 tr_print_config(new_cfg);
991 table_str=tr_trps_route_table_to_str(NULL, trps);
992 if (table_str!=NULL) {
994 talloc_free(table_str);
996 table_str=tr_trps_comm_table_to_str(NULL, trps);
997 if (table_str!=NULL) {
999 talloc_free(table_str);