9 #include <trust_router/tr_name.h>
10 #include <trp_internal.h>
11 #include <trp_ptable.h>
12 #include <trp_rtable.h>
16 static int trps_destructor(void *object)
18 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
19 if (trps->rtable!=NULL)
20 trp_rtable_free(trps->rtable);
24 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
26 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
33 trps->update_interval=(struct timeval){0,0};
34 trps->sweep_interval=(struct timeval){0,0};
36 trps->mq=tr_mq_new(trps);
38 /* failed to allocate mq */
43 trps->ptable=trp_ptable_new(trps);
44 if (trps->ptable==NULL) {
45 /* failed to allocate ptable */
51 if (trps_init_rtable(trps) != TRP_SUCCESS) {
52 /* failed to allocate rtable */
57 talloc_set_destructor((void *)trps, trps_destructor);
62 /* create a new route table, first discarding an old one if necessary */
63 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
65 if (trps->rtable != NULL) {
66 trp_rtable_free(trps->rtable);
70 trps->rtable=trp_rtable_new();
71 if (trps->rtable==NULL) {
77 void trps_clear_rtable(TRPS_INSTANCE *trps)
79 trp_rtable_clear(trps->rtable);
82 void trps_free (TRPS_INSTANCE *trps)
88 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
90 return tr_mq_pop(trps->mq);
93 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
95 tr_mq_add(trps->mq, msg);
98 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
100 return trps->connect_interval.tv_sec;
103 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
105 trps->connect_interval.tv_sec=interval;
106 trps->connect_interval.tv_usec=0;
109 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
111 return trps->update_interval.tv_sec;
114 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
116 trps->update_interval.tv_sec=interval;
117 trps->update_interval.tv_usec=0;
120 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
122 return trps->sweep_interval.tv_sec;
125 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
127 trps->sweep_interval.tv_sec=interval;
128 trps->sweep_interval.tv_usec=0;
131 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
133 TRPC_INSTANCE *cur=NULL;
135 TR_NAME *peer_gssname=trp_peer_get_gssname(peer);
137 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
138 name=trpc_get_gssname(cur);
139 if ((name!=NULL) && (0==tr_name_cmp(peer_gssname, name))) {
146 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
148 if (trps->conn==NULL)
151 trp_connection_append(trps->conn, new);
153 talloc_steal(trps, new);
156 /* ok to call more than once; guarantees connection no longer in the list.
157 * Caller is responsible for freeing the removed element afterwards. */
158 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
160 trps->conn=trp_connection_remove(trps->conn, remove);
163 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
165 if (trps->trpc==NULL)
168 trpc_append(trps->trpc, trpc);
170 talloc_steal(trps, trpc);
173 /* ok to call more than once; guarantees trpc no longer in the list.
174 * Caller is responsible for freeing the removed element afterwards. */
175 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
177 trps->trpc=trpc_remove(trps->trpc, remove);
180 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
182 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
183 TR_MQ_MSG *mq_msg=NULL;
186 TRPC_INSTANCE *trpc=NULL;
188 /* get the connection for this peer */
189 trpc=trps_find_trpc(trps, peer);
190 /* instead, let's let that happen and then clear the queue when an attempt to
193 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
195 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
196 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
197 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
198 trpc_mq_add(trpc, mq_msg);
201 talloc_free(tmp_ctx);
205 static int trps_listen (TRPS_INSTANCE *trps, int port)
212 struct sockaddr_storage storage;
213 struct sockaddr_in in4;
216 struct sockaddr_in *saddr = (struct sockaddr_in *) &addr.in4;
218 saddr->sin_port = htons (port);
219 saddr->sin_family = AF_INET;
220 saddr->sin_addr.s_addr = INADDR_ANY;
222 if (0 > (conn = socket (AF_INET, SOCK_STREAM, 0)))
225 setsockopt(conn, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
227 if (0 > (rc = bind (conn, (struct sockaddr *) saddr, sizeof(struct sockaddr_in))))
230 if (0 > (rc = listen(conn, 512)))
233 tr_debug("trps_listen: TRP Server listening on port %d", port);
237 /* get the currently selected route if available */
238 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
240 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
243 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
245 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
248 /* copy the result if you want to keep it */
249 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
251 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
255 return trp_route_get_next_hop(route);
259 /* mark a route as retracted */
260 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
262 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
263 trp_route_set_triggered(entry, 1);
266 /* is this route retracted? */
267 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
269 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
272 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
279 tr_debug("trps_read_message: started");
280 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
281 *(trp_connection_get_gssctx(conn)),
284 tr_debug("trps_read_message: error");
290 tr_debug("trps_read_message(): Request Received, %u bytes.", (unsigned) buflen);
291 tr_debug("trps_read_message(): %.*s", buflen, buf);
293 *msg=tr_msg_decode(buf, buflen);
298 peer=trp_connection_get_peer(conn);
299 /* verify we received a message we support, otherwise drop it now */
300 switch (tr_msg_get_msg_type(*msg)) {
302 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(peer));
306 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(peer));
310 tr_debug("trps_read_message: received unsupported message from %.*s", peer->len, peer->buf);
311 tr_msg_free_decoded(*msg);
313 return TRP_UNSUPPORTED;
319 int trps_get_listener(TRPS_INSTANCE *trps,
320 TRPS_MSG_FUNC msg_handler,
321 TRP_AUTH_FUNC auth_handler,
322 const char *hostname,
328 if (0 > (listen = trps_listen(trps, port))) {
330 if (0 == strerror_r(errno, errbuf, 256)) {
331 tr_debug("trps_get_listener: Error opening port %d: %s.", port, errbuf);
333 tr_debug("trps_get_listener: Unknown error openining port %d.", port);
338 /* opening port succeeded */
339 tr_debug("trps_get_listener: Opened port %d.", port);
341 /* make this socket non-blocking */
342 if (0 != fcntl(listen, F_SETFL, O_NONBLOCK)) {
343 tr_debug("trps_get_listener: Error setting O_NONBLOCK.");
350 /* store the caller's request handler & cookie */
351 trps->msg_handler = msg_handler;
352 trps->auth_handler = auth_handler;
353 trps->hostname = talloc_strdup(trps, hostname);
355 trps->cookie = cookie;
361 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
363 /* try to establish a GSS context */
364 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
365 tr_notice("trps_authorize_connection: failed to authorize connection");
366 trp_connection_close(conn);
369 tr_notice("trps_authorize_connection: authorized connection");
373 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
378 /* loop as long as the connection exists */
379 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
380 rc=trps_read_message(trps, conn, &msg);
383 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
387 trp_connection_close(conn);
391 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
395 tr_debug("trps_handle_connection: connection closed.");
398 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
401 tr_notice("trps_validate_update: null TRP update.");
405 if (trp_upd_get_inforec(upd)==NULL) {
406 tr_notice("trps_validate_update: received TRP update with no info records.");
410 if (trp_upd_get_peer(upd)==NULL) {
411 tr_notice("trps_validate_update: received TRP update without origin peer information.");
418 /* ensure that the update could be accepted if feasible */
419 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
421 switch(trp_inforec_get_type(rec)) {
422 case TRP_INFOREC_TYPE_ROUTE:
423 if ((trp_inforec_get_comm(rec)==NULL)
424 || (trp_inforec_get_realm(rec)==NULL)
425 || (trp_inforec_get_trust_router(rec)==NULL)
426 || (trp_inforec_get_next_hop(rec)==NULL)) {
427 tr_debug("trps_validate_inforec: missing record info.");
431 /* check for valid metric */
432 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
433 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
437 /* check for valid interval */
438 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
439 tr_debug("trps_validate_inforec: invalid interval.");
445 tr_notice("trps_validate_inforec: unsupported record type.");
446 return TRP_UNSUPPORTED;
452 /* link cost to a peer */
453 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
458 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
460 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
462 return TRP_METRIC_INFINITY;
463 return trp_route_get_metric(entry) + trps_cost(trps, peer);
466 static int trps_check_feasibility(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
468 unsigned int rec_metric=trp_inforec_get_metric(rec);
469 unsigned int new_metric=0;
470 unsigned int current_metric=0;
471 TR_NAME *next_hop=NULL;
473 /* we check these in the validation stage, but just in case... */
474 if (trp_metric_is_invalid(rec_metric))
477 /* retractions (aka infinite metrics) are always feasible */
478 if (trp_metric_is_infinite(rec_metric))
481 /* updates from our current next hop are always feasible*/
482 next_hop=trps_get_next_hop(trps,
483 trp_inforec_get_comm(rec),
484 trp_inforec_get_realm(rec));;
486 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
491 /* compare the existing metric we advertise to what we would advertise
492 * if we accept this update */
493 current_metric=trps_advertised_metric(trps,
494 trp_inforec_get_comm(rec),
495 trp_inforec_get_realm(rec),
496 trp_inforec_get_next_hop(rec));
497 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
498 if (new_metric <= current_metric)
504 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
505 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
507 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
508 if (0!=clock_gettime(CLOCK_REALTIME, ts)) {
509 tr_err("trps_compute_expiry: could not read realtime clock.");
513 ts->tv_sec += small_factor*interval;
517 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
519 TRP_ROUTE *entry=NULL;
521 entry=trp_rtable_get_entry(trps->rtable,
522 trp_inforec_get_comm(rec),
523 trp_inforec_get_realm(rec),
524 trp_inforec_get_next_hop(rec));
526 entry=trp_route_new(NULL);
528 tr_err("trps_accept_update: unable to allocate new entry.");
532 trp_route_set_apc(entry, tr_dup_name(trp_inforec_get_comm(rec)));
533 trp_route_set_realm(entry, tr_dup_name(trp_inforec_get_realm(rec)));
534 trp_route_set_peer(entry, tr_dup_name(trp_inforec_get_next_hop(rec)));
535 trp_route_set_trust_router(entry, tr_dup_name(trp_inforec_get_trust_router(rec)));
536 trp_route_set_next_hop(entry, tr_dup_name(trp_inforec_get_next_hop(rec)));
537 if ((trp_route_get_apc(entry)==NULL)
538 ||(trp_route_get_realm(entry)==NULL)
539 ||(trp_route_get_peer(entry)==NULL)
540 ||(trp_route_get_trust_router(entry)==NULL)
541 ||(trp_route_get_next_hop(entry)==NULL)) {
542 /* at least one field could not be allocated */
543 tr_err("trps_accept_update: unable to allocate all fields for entry.");
544 trp_route_free(entry);
547 trp_rtable_add(trps->rtable, entry);
550 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
551 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
552 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
553 * time unset on a new route entry. */
554 tr_debug("trps_accept_update: accepting route update.");
555 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
556 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
558 /* check whether the trust router has changed */
559 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
560 trp_inforec_get_trust_router(rec))) {
561 /* The name changed. Set this route as triggered. */
562 tr_debug("trps_accept_update: trust router for route changed.");
563 trp_route_set_triggered(entry, 1);
564 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
566 if (!trps_route_retracted(trps, entry)) {
567 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
568 trp_route_set_expiry(entry, trps_compute_expiry(trps,
569 trp_route_get_interval(entry),
570 trp_route_get_expiry(entry)));
575 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
578 TRP_INFOREC *rec=NULL;
579 TRP_ROUTE *route=NULL;
581 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
582 tr_notice("trps_handle_update: received invalid TRP update.");
586 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
587 /* validate/sanity check the record update */
588 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
589 tr_notice("trps_handle_update: invalid record in TRP update, discarding entire update.");
594 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
595 /* determine feasibility */
596 feas=trps_check_feasibility(trps, rec);
597 tr_debug("trps_handle_update: record feasibility=%d", feas);
599 /* do we have an existing route? */
600 route=trps_get_route(trps,
601 trp_inforec_get_comm(rec),
602 trp_inforec_get_realm(rec),
603 trp_inforec_get_next_hop(rec));
605 /* there was a route table entry already */
606 tr_debug("trps_handle_updates: route entry already exists.");
608 /* Update is feasible. Accept it. */
609 trps_accept_update(trps, rec);
611 /* Update is infeasible. Ignore it unless the trust router has changed. */
612 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
613 trp_inforec_get_trust_router(rec))) {
614 /* the trust router associated with the route has changed, treat update as a retraction */
615 trps_retract_route(trps, route);
619 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
620 tr_debug("trps_handle_update: no route entry exists yet.");
621 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
622 trps_accept_update(trps, rec);
628 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
631 tr_notice("trps_validate_request: null TRP request.");
635 if (trp_req_get_comm(req)==NULL) {
636 tr_notice("trps_validate_request: received TRP request with null community.");
640 if (trp_req_get_realm(req)==NULL) {
641 tr_notice("trps_validate_request: received TRP request with null realm.");
645 if (trp_req_get_peer(req)==NULL) {
646 tr_notice("trps_validate_request: received TRP request without origin peer information.");
653 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
654 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
657 TR_NAME *exclude_peer)
659 TRP_ROUTE **entry=NULL;
660 TRP_ROUTE *best=NULL;
663 unsigned int kk_min=0;
664 unsigned int min_metric=TRP_METRIC_INFINITY;
666 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
667 for (kk=0; kk<n_entry; kk++) {
668 if (trp_route_get_metric(entry[kk]) < min_metric) {
669 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
672 min_metric=trp_route_get_metric(entry[kk]);
676 if (trp_metric_is_finite(min_metric))
683 /* TODO: think this through more carefully. At least ought to add hysteresis
684 * to avoid flapping between routers or routes. */
685 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
687 size_t n_apc=0, ii=0;
688 TR_NAME **apc=trp_rtable_get_apcs(trps->rtable, &n_apc);
689 size_t n_realm=0, jj=0;
690 TR_NAME **realm=NULL;
691 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
692 unsigned int best_metric=0, cur_metric=0;
694 for (ii=0; ii<n_apc; ii++) {
695 realm=trp_rtable_get_apc_realms(trps->rtable, apc[ii], &n_realm);
696 for (jj=0; jj<n_realm; jj++) {
697 best_route=trps_find_best_route(trps, apc[ii], realm[jj], NULL);
698 if (best_route==NULL)
699 best_metric=TRP_METRIC_INFINITY;
701 best_metric=trp_route_get_metric(best_route);
703 cur_route=trps_get_selected_route(trps, apc[ii], realm[jj]);
704 if (cur_route!=NULL) {
705 cur_metric=trp_route_get_metric(cur_route);
706 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
707 /* The new route has a lower metric than the previous, and is finite. Accept. */
708 trp_route_set_selected(cur_route, 0);
709 trp_route_set_selected(best_route, 1);
710 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
711 trp_route_set_selected(cur_route, 0);
712 } else if (trp_metric_is_finite(best_metric)) {
713 trp_route_set_selected(best_route, 1);
718 realm=NULL; n_realm=0;
727 /* true if curtime >= expiry */
728 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
730 return ((curtime->tv_sec > expiry->tv_sec)
731 || ((curtime->tv_sec == expiry->tv_sec)
732 &&(curtime->tv_nsec > expiry->tv_nsec)));
735 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
736 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
737 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
739 struct timespec sweep_time={0,0};
740 TRP_ROUTE **entry=NULL;
744 /* use a single time for the entire sweep */
745 if (0!=clock_gettime(CLOCK_REALTIME, &sweep_time)) {
746 tr_err("trps_sweep_routes: could not read realtime clock.");
748 sweep_time.tv_nsec=0;
752 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
754 /* loop over the entries */
755 for (ii=0; ii<n_entry; ii++) {
756 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
757 tr_debug("trps_sweep_routes: route expired.");
758 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
760 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
761 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
764 /* set metric to infinity and reset timer */
765 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
766 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
767 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
768 trp_route_get_interval(entry[ii]),
769 trp_route_get_expiry(entry[ii])));
778 /* select the correct route to comm/realm to be announced to peer */
779 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
783 /* Take the currently selected route unless it is through the peer we're sending the update to.
784 * I.e., enforce the split horizon rule. */
785 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
787 /* No selected route, this should only happen if the only route has been retracted,
788 * in which case we do not want to advertise it. */
791 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
792 trp_route_get_peer(route)->buf);
793 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
794 tr_debug("trps_select_realm_update: matched, finding alternate route");
795 /* the selected entry goes through the peer we're reporting to, choose an alternate */
796 route=trps_find_best_route(trps, comm, realm, peer_gssname);
797 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
798 return NULL; /* don't advertise a nonexistent or retracted route */
803 /* returns an array of pointers to updates (*not* an array of updates). Returns number of entries
804 * via n_update parameter. (The allocated space will generally be larger than required, see note in
805 * the code.) If triggered is set, sends only triggered updates. */
806 static TRP_ROUTE **trps_select_updates_for_peer(TALLOC_CTX *memctx,
808 TR_NAME *peer_gssname,
813 TR_NAME **apc=trp_rtable_get_apcs(trps->rtable, &n_apc);
814 TR_NAME **realm=NULL;
817 TRP_ROUTE *best=NULL;
818 TRP_ROUTE **result=NULL;
821 /* Need to allocate space for the results. For simplicity, we just allocate a block
822 * with space for every route table entry to be returned. This is guaranteed to be large
823 * enough. If the routing table gets very large, this may be wasteful, but that seems
824 * unlikely to be significant in the near future. */
825 result=talloc_array(memctx, TRP_ROUTE *, trp_rtable_size(trps->rtable));
832 for (ii=0; ii<n_apc; ii++) {
833 realm=trp_rtable_get_apc_realms(trps->rtable, apc[ii], &n_realm);
834 for (jj=0; jj<n_realm; jj++) {
835 best=trps_select_realm_update(trps, apc[ii], realm[jj], peer_gssname);
836 /* If we found a route, add it to the list. If triggered!=0, then only
837 * add triggered routes. */
838 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best)))
839 result[n_used++]=best;
854 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
856 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
857 return TRP_METRIC_INVALID;
859 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
860 return TRP_METRIC_INFINITY;
862 if (trp_metric_is_finite(m1+m2))
865 return TRP_METRIC_INFINITY;
868 /* convert an rentry into a new trp update info record */
869 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
871 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
872 unsigned int linkcost=0;
875 if (trp_route_is_local(route))
878 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
879 trp_route_get_next_hop(route)));
882 /* Note that we leave the next hop empty since the recipient fills that in.
883 * This is where we add the link cost (currently always 1) to the next peer. */
884 if ((trp_inforec_set_comm(rec, trp_route_dup_apc(route)) != TRP_SUCCESS)
885 ||(trp_inforec_set_realm(rec, trp_route_dup_realm(route)) != TRP_SUCCESS)
886 ||(trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
887 ||(trp_inforec_set_metric(rec,
888 trps_metric_add(trp_route_get_metric(route),
889 linkcost)) != TRP_SUCCESS)
890 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
891 tr_err("trps_route_to_inforec: error creating route update.");
899 /* all routes to a single peer, unless comm/realm are specified (both or neither must be NULL) */
900 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
901 TR_NAME *peer_gssname,
902 TRP_UPDATE_TYPE update_type,
906 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
907 TR_MSG msg; /* not a pointer! */
909 TRP_ROUTE **update_list=NULL;
910 TRP_INFOREC *rec=NULL;
911 size_t n_updates=0, ii=0;
914 TRP_PEER *peer=trps_get_peer_by_gssname(trps, peer_gssname);
916 if (!trps_peer_connected(trps, peer)) {
917 tr_debug("trps_update_one_peer: no TRP connection to %.*s, skipping.",
918 peer_gssname->len, peer_gssname->buf);
921 switch (update_type) {
922 case TRP_UPDATE_TRIGGERED:
923 tr_debug("trps_update_one_peer: preparing triggered route update for %.*s",
924 peer_gssname->len, peer_gssname->buf);
926 case TRP_UPDATE_SCHEDULED:
927 tr_debug("trps_update_one_peer: preparing scheduled route update for %.*s",
928 peer_gssname->len, peer_gssname->buf);
930 case TRP_UPDATE_REQUESTED:
931 tr_debug("trps_update_one_peer: preparing requested route update for %.*s",
932 peer_gssname->len, peer_gssname->buf);
935 /* do not fill in peer, recipient does that */
936 if ((comm==NULL) && (realm==NULL)) {
938 update_list=trps_select_updates_for_peer(tmp_ctx,
941 update_type==TRP_UPDATE_TRIGGERED,
943 } else if ((comm!=NULL) && (realm!=NULL)) {
944 /* a single community/realm was requested */
945 update_list=talloc(tmp_ctx, TRP_ROUTE *);
946 if (update_list==NULL) {
947 tr_err("trps_update_one_peer: could not allocate update_list.");
951 *update_list=trps_select_realm_update(trps, comm, realm, peer_gssname);
952 if (*update_list==NULL) {
953 /* we have no actual update to send back, MUST send a retraction */
954 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
955 *update_list=trp_route_new(update_list);
956 trp_route_set_apc(*update_list, tr_dup_name(comm));
957 trp_route_set_realm(*update_list, tr_dup_name(realm));
958 trp_route_set_peer(*update_list, tr_new_name(""));
959 trp_route_set_metric(*update_list, TRP_METRIC_INFINITY);
960 trp_route_set_trust_router(*update_list, tr_new_name(""));
961 trp_route_set_next_hop(*update_list, tr_new_name(""));
965 tr_err("trps_update_one_peer: error: only comm or realm was specified.");
969 if ((n_updates>0) && (update_list!=NULL)) {
970 tr_debug("trps_update_one_peer: sending %u update records.", (unsigned int)n_updates);
971 upd=trp_upd_new(tmp_ctx);
973 for (ii=0; ii<n_updates; ii++) {
974 rec=trps_route_to_inforec(tmp_ctx, trps, update_list[ii]);
976 tr_err("trps_update_one_peer: could not create all update records.");
980 trp_upd_add_inforec(upd, rec);
982 talloc_free(update_list);
985 /* now encode the update message */
986 tr_msg_set_trp_upd(&msg, upd);
987 encoded=tr_msg_encode(&msg);
989 tr_err("trps_update_one_peer: error encoding update.");
994 tr_debug("trps_update_one_peer: adding message to queue.");
995 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
996 tr_err("trps_update_one_peer: error queueing update.");
998 tr_debug("trps_update_one_peer: update queued successfully.");
1000 tr_msg_free_encoded(encoded);
1007 talloc_free(tmp_ctx);
1011 /* all routes to all peers */
1012 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1014 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1015 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1016 TRP_PEER *peer=NULL;
1017 TRP_RC rc=TRP_SUCCESS;
1020 tr_err("trps_update: failed to allocate peer table iterator.");
1021 talloc_free(tmp_ctx);
1025 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1026 peer!=NULL && rc==TRP_SUCCESS;
1027 peer=trp_ptable_iter_next(iter))
1029 rc=trps_update_one_peer(trps, trp_peer_get_gssname(peer), update_type, NULL, NULL);
1032 trp_ptable_iter_free(iter);
1033 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1034 talloc_free(tmp_ctx);
1038 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1040 trp_rtable_add(trps->rtable, route); /* should return status */
1044 /* steals the peer object */
1045 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1047 return trp_ptable_add(trps->ptable, peer);
1050 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1052 return trp_ptable_find_gssname(trps->ptable, gssname);
1055 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1057 return trp_ptable_find_servicename(trps->ptable, servicename);
1060 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1062 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1066 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1073 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1076 TR_NAME *realm=NULL;
1078 tr_debug("trps_handle_request: handling TRP request.");
1080 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1081 tr_notice("trps_handle_request: received invalid TRP request.");
1085 if (!trp_req_is_wildcard(req)) {
1086 comm=trp_req_get_comm(req);
1087 realm=trp_req_get_realm(req);
1088 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1089 comm->len, comm->buf, realm->len, realm->buf);
1091 tr_debug("trps_handle_request: all routes requested.");
1093 return trps_update_one_peer(trps, trp_req_get_peer(req), TRP_UPDATE_REQUESTED, comm, realm);
1097 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1099 TRP_RC rc=TRP_ERROR;
1101 switch (tr_msg_get_msg_type(tr_msg)) {
1103 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1104 if (rc==TRP_SUCCESS) {
1105 rc=trps_update_active_routes(trps);
1106 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1111 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1115 /* unknown error or one we don't care about (e.g., TID messages) */
1120 /* send wildcard route request to a peer */
1121 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1123 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1124 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1125 TR_MSG msg; /* not a pointer */
1126 TRP_REQ *req=trp_req_new(tmp_ctx);
1128 TRP_RC rc=TRP_ERROR;
1131 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1135 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1136 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1141 tr_msg_set_trp_req(&msg, req);
1142 encoded=tr_msg_encode(&msg);
1143 if (encoded==NULL) {
1144 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1149 tr_debug("trps_wildcard_route_req: adding message to queue.");
1150 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1151 tr_err("trps_wildcard_route_req: error queueing request.");
1154 tr_debug("trps_wildcard_route_req: request queued successfully.");
1160 tr_msg_free_encoded(encoded);
1164 talloc_free(tmp_ctx);