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_append(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
95 tr_mq_append(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))) {
143 tr_free_name(peer_gssname);
147 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
149 if (trps->conn==NULL)
152 trp_connection_append(trps->conn, new);
154 talloc_steal(trps, new);
157 /* ok to call more than once; guarantees connection no longer in the list.
158 * Caller is responsible for freeing the removed element afterwards. */
159 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
161 trps->conn=trp_connection_remove(trps->conn, remove);
164 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
166 if (trps->trpc==NULL)
169 trpc_append(trps->trpc, trpc);
171 talloc_steal(trps, trpc);
174 /* ok to call more than once; guarantees trpc no longer in the list.
175 * Caller is responsible for freeing the removed element afterwards. */
176 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
178 trps->trpc=trpc_remove(trps->trpc, remove);
181 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
183 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
184 TR_MQ_MSG *mq_msg=NULL;
187 TRPC_INSTANCE *trpc=NULL;
189 /* get the connection for this peer */
190 trpc=trps_find_trpc(trps, peer);
191 if ((trpc==NULL) || (trpc_get_status(trps->trpc)!=TRP_CONNECTION_UP)) {
192 /* We could just let these sit on the queue in the hopes that a connection
193 * is eventually established. However, we'd then have to ensure the queue
194 * didn't keep growing, etc. */
195 tr_warning("trps_send_msg: skipping message queued while TRPC connection not up.");
197 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND);
198 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
199 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
200 trpc_mq_append(trpc, mq_msg);
203 talloc_free(tmp_ctx);
207 static int trps_listen (TRPS_INSTANCE *trps, int port)
214 struct sockaddr_storage storage;
215 struct sockaddr_in in4;
218 struct sockaddr_in *saddr = (struct sockaddr_in *) &addr.in4;
220 saddr->sin_port = htons (port);
221 saddr->sin_family = AF_INET;
222 saddr->sin_addr.s_addr = INADDR_ANY;
224 if (0 > (conn = socket (AF_INET, SOCK_STREAM, 0)))
227 setsockopt(conn, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
229 if (0 > (rc = bind (conn, (struct sockaddr *) saddr, sizeof(struct sockaddr_in))))
232 if (0 > (rc = listen(conn, 512)))
235 tr_debug("trps_listen: TRP Server listening on port %d", port);
239 #if 0 /* remove this if I forget to do so */
240 /* returns EACCES if authorization is denied */
241 int trps_auth_cb(gss_name_t clientName, gss_buffer_t displayName, void *data)
243 TRPS_INSTANCE *trps = (TRPS_INSTANCE *)data;
246 if (0!=trps->auth_handler(clientName, displayName, trps->cookie)) {
247 tr_debug("trps_auth_cb: client '%.*s' denied authorization.", displayName->length, displayName->value);
248 result=EACCES; /* denied */
255 /* get the currently selected route if available */
256 TRP_RENTRY *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
258 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
261 TRP_RENTRY *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
263 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
266 /* copy the result if you want to keep it */
267 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
269 TRP_RENTRY *route=trps_get_selected_route(trps, comm, realm);
273 return trp_rentry_get_next_hop(route);
277 /* mark a route as retracted */
278 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_RENTRY *entry)
280 trp_rentry_set_metric(entry, TRP_METRIC_INFINITY);
283 /* is this route retracted? */
284 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_RENTRY *entry)
286 return (trp_metric_is_infinite(trp_rentry_get_metric(entry)));
289 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
296 tr_debug("trps_read_message: started");
297 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
298 *(trp_connection_get_gssctx(conn)),
301 tr_debug("trps_read_message: error");
307 tr_debug("trps_read_message(): Request Received, %u bytes.", (unsigned) buflen);
308 tr_debug("trps_read_message(): %.*s", buflen, buf);
310 *msg=tr_msg_decode(buf, buflen);
315 peer=trp_connection_get_peer(conn);
316 /* verify we received a message we support, otherwise drop it now */
317 switch (tr_msg_get_msg_type(*msg)) {
319 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(peer));
323 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(peer));
327 tr_debug("trps_read_message: received unsupported message from %.*s", peer->len, peer->buf);
328 tr_msg_free_decoded(*msg);
330 return TRP_UNSUPPORTED;
336 int trps_get_listener(TRPS_INSTANCE *trps,
337 TRPS_MSG_FUNC msg_handler,
338 TRP_AUTH_FUNC auth_handler,
339 const char *hostname,
345 if (0 > (listen = trps_listen(trps, port))) {
347 if (0 == strerror_r(errno, errbuf, 256)) {
348 tr_debug("trps_get_listener: Error opening port %d: %s.", port, errbuf);
350 tr_debug("trps_get_listener: Unknown error openining port %d.", port);
355 /* opening port succeeded */
356 tr_debug("trps_get_listener: Opened port %d.", port);
358 /* make this socket non-blocking */
359 if (0 != fcntl(listen, F_SETFL, O_NONBLOCK)) {
360 tr_debug("trps_get_listener: Error setting O_NONBLOCK.");
367 /* store the caller's request handler & cookie */
368 trps->msg_handler = msg_handler;
369 trps->auth_handler = auth_handler;
370 trps->hostname = talloc_strdup(trps, hostname);
372 trps->cookie = cookie;
378 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
380 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
384 /* try to establish a GSS context */
385 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
386 tr_notice("tr_trps_conn_thread: failed to authorize connection");
389 tr_notice("trps_handle_connection: authorized connection");
391 /* loop as long as the connection exists */
392 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
393 rc=trps_read_message(trps, conn, &msg);
396 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
400 trp_connection_close(conn);
404 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
408 tr_debug("trps_handle_connection: connection closed.");
409 talloc_free(tmp_ctx);
412 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
414 if (trp_upd_get_inforec(upd)==NULL) {
415 tr_notice("trps_validate_update: received TRP update with no info records.");
419 if (trp_upd_get_peer(upd)==NULL) {
420 tr_notice("trps_validate_update: received TRP update without origin peer information.");
427 /* ensure that the update could be accepted if feasible */
428 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
430 switch(trp_inforec_get_type(rec)) {
431 case TRP_INFOREC_TYPE_ROUTE:
432 if ((trp_inforec_get_comm(rec)==NULL)
433 || (trp_inforec_get_realm(rec)==NULL)
434 || (trp_inforec_get_trust_router(rec)==NULL)
435 || (trp_inforec_get_next_hop(rec)==NULL)) {
436 tr_debug("trps_validate_inforec: missing record info.");
440 /* check for valid metric */
441 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
442 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
446 /* check for valid interval */
447 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
448 tr_debug("trps_validate_inforec: invalid interval.");
454 tr_notice("trps_validate_inforec: unsupported record type.");
455 return TRP_UNSUPPORTED;
461 /* link cost to a peer */
462 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
467 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
469 TRP_RENTRY *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
471 return TRP_METRIC_INFINITY;
472 return trp_rentry_get_metric(entry) + trps_cost(trps, peer);
475 static int trps_check_feasibility(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
477 unsigned int rec_metric=trp_inforec_get_metric(rec);
478 unsigned int new_metric=0;
479 unsigned int current_metric=0;
480 TR_NAME *next_hop=NULL;
482 /* we check these in the validation stage, but just in case... */
483 if (trp_metric_is_invalid(rec_metric))
486 /* retractions (aka infinite metrics) are always feasible */
487 if (trp_metric_is_infinite(rec_metric))
490 /* updates from our current next hop are always feasible*/
491 next_hop=trps_get_next_hop(trps,
492 trp_inforec_get_comm(rec),
493 trp_inforec_get_realm(rec));;
495 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
500 /* compare the existing metric we advertise to what we would advertise
501 * if we accept this update */
502 current_metric=trps_advertised_metric(trps,
503 trp_inforec_get_comm(rec),
504 trp_inforec_get_realm(rec),
505 trp_inforec_get_next_hop(rec));
506 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
507 if (new_metric <= current_metric)
513 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
514 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
516 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
517 if (0!=clock_gettime(CLOCK_REALTIME, ts)) {
518 tr_err("trps_compute_expiry: could not read realtime clock.");
522 ts->tv_sec += small_factor*interval;
526 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
528 TRP_RENTRY *entry=NULL;
530 entry=trp_rtable_get_entry(trps->rtable,
531 trp_inforec_get_comm(rec),
532 trp_inforec_get_realm(rec),
533 trp_inforec_get_next_hop(rec));
535 entry=trp_rentry_new(NULL);
537 tr_err("trps_accept_update: unable to allocate new entry.");
541 trp_rentry_set_apc(entry, tr_dup_name(trp_inforec_get_comm(rec)));
542 trp_rentry_set_realm(entry, tr_dup_name(trp_inforec_get_realm(rec)));
543 trp_rentry_set_peer(entry, tr_dup_name(trp_inforec_get_next_hop(rec)));
544 trp_rentry_set_trust_router(entry, tr_dup_name(trp_inforec_get_trust_router(rec)));
545 trp_rentry_set_next_hop(entry, tr_dup_name(trp_inforec_get_next_hop(rec)));
546 if ((trp_rentry_get_apc(entry)==NULL)
547 ||(trp_rentry_get_realm(entry)==NULL)
548 ||(trp_rentry_get_peer(entry)==NULL)
549 ||(trp_rentry_get_trust_router(entry)==NULL)
550 ||(trp_rentry_get_next_hop(entry)==NULL)) {
551 /* at least one field could not be allocated */
552 tr_err("trps_accept_update: unable to allocate all fields for entry.");
553 trp_rentry_free(entry);
556 trp_rtable_add(trps->rtable, entry);
559 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
560 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
561 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
562 * time unset on a new route entry. */
563 tr_debug("trps_accept_update: accepting route update.");
564 trp_rentry_set_metric(entry, trp_inforec_get_metric(rec));
565 trp_rentry_set_interval(entry, trp_inforec_get_interval(rec));
566 if (!trps_route_retracted(trps, entry)) {
567 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
568 trp_rentry_set_expiry(entry, trps_compute_expiry(trps,
569 trp_rentry_get_interval(entry),
570 trp_rentry_get_expiry(entry)));
575 /* TODO: handle community updates */
576 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
579 TRP_INFOREC *rec=NULL;
580 TRP_RENTRY *route=NULL;
582 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
583 tr_notice("trps_handle_update: received invalid TRP update.");
587 rec=trp_upd_get_inforec(upd);
588 for (;rec!=NULL; rec=trp_inforec_get_next(rec)) {
589 /* validate/sanity check the record update */
590 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
591 tr_notice("trps_handle_update: invalid record in TRP update.");
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, trp_inforec_get_comm(rec), trp_inforec_get_realm(rec), trp_inforec_get_next_hop(rec));
602 /* there was a route table entry already */
603 tr_debug("trps_handle_updates: route entry already exists.");
605 /* Update is feasible. Accept it. */
606 trps_accept_update(trps, rec);
608 /* Update is infeasible. Ignore it unless the trust router has changed. */
609 if (0!=tr_name_cmp(trp_rentry_get_trust_router(route),
610 trp_inforec_get_trust_router(rec))) {
611 /* the trust router associated with the route has changed, treat update as a retraction */
612 trps_retract_route(trps, route);
616 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
617 tr_debug("trps_handle_update: no route entry exists yet.");
618 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
619 trps_accept_update(trps, rec);
625 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
626 static TRP_RENTRY *trps_find_best_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *exclude_peer)
628 TRP_RENTRY **entry=NULL;
629 TRP_RENTRY *best=NULL;
632 unsigned int kk_min=0;
633 unsigned int min_metric=TRP_METRIC_INFINITY;
635 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
636 for (kk=0; kk<n_entry; kk++) {
637 if (trp_rentry_get_metric(entry[kk]) < min_metric) {
638 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_rentry_get_peer(entry[kk]),
641 min_metric=trp_rentry_get_metric(entry[kk]);
645 if (trp_metric_is_finite(min_metric));
652 /* TODO: think this through more carefully. At least ought to add hysteresis
653 * to avoid flapping between routers or routes. */
654 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
656 size_t n_apc=0, ii=0;
657 TR_NAME **apc=trp_rtable_get_apcs(trps->rtable, &n_apc);
658 size_t n_realm=0, jj=0;
659 TR_NAME **realm=NULL;
660 TRP_RENTRY *best_route=NULL, *cur_route=NULL;
661 unsigned int best_metric=0, cur_metric=0;
663 for (ii=0; ii<n_apc; ii++) {
664 realm=trp_rtable_get_apc_realms(trps->rtable, apc[ii], &n_realm);
665 for (jj=0; jj<n_realm; jj++) {
666 best_route=trps_find_best_route(trps, apc[ii], realm[jj], NULL);
667 if (best_route==NULL)
668 best_metric=TRP_METRIC_INFINITY;
670 best_metric=trp_rentry_get_metric(best_route);
672 cur_route=trps_get_selected_route(trps, apc[ii], realm[jj]);
673 if (cur_route!=NULL) {
674 cur_metric=trp_rentry_get_metric(cur_route);
675 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
676 trp_rentry_set_selected(cur_route, 0);
677 trp_rentry_set_selected(best_route, 1);
678 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
679 trp_rentry_set_selected(cur_route, 0);
680 } else if (trp_metric_is_finite(best_metric))
681 trp_rentry_set_selected(best_route, 1);
685 realm=NULL; n_realm=0;
694 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
698 switch (tr_msg_get_msg_type(tr_msg)) {
700 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
701 if (rc==TRP_SUCCESS) {
702 rc=trps_update_active_routes(trps);
707 return TRP_UNSUPPORTED;
710 /* unknown error or one we don't care about (e.g., TID messages) */
715 /* true if curtime >= expiry */
716 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
718 return ((curtime->tv_sec > expiry->tv_sec)
719 || ((curtime->tv_sec == expiry->tv_sec)
720 &&(curtime->tv_nsec > expiry->tv_nsec)));
723 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
724 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
725 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
727 struct timespec sweep_time={0,0};
728 TRP_RENTRY **entry=NULL;
732 /* use a single time for the entire sweep */
733 if (0!=clock_gettime(CLOCK_REALTIME, &sweep_time)) {
734 tr_err("trps_sweep_routes: could not read realtime clock.");
736 sweep_time.tv_nsec=0;
740 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
742 /* loop over the entries */
743 for (ii=0; ii<n_entry; ii++) {
744 if (trps_expired(trp_rentry_get_expiry(entry[ii]), &sweep_time)) {
745 tr_debug("trps_sweep_routes: route expired.");
746 if (!trp_metric_is_finite(trp_rentry_get_metric(entry[ii]))) {
748 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
749 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
752 /* set metric to infinity and reset timer */
753 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
754 trp_rentry_set_metric(entry[ii], TRP_METRIC_INFINITY);
755 trp_rentry_set_expiry(entry[ii], trps_compute_expiry(trps,
756 trp_rentry_get_interval(entry[ii]),
757 trp_rentry_get_expiry(entry[ii])));
766 /* select the correct route to comm/realm to be announced to peer */
767 static TRP_RENTRY *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
771 /* Take the currently selected route unless it is through the peer we're sending the update to.
772 * I.e., enforce the split horizon rule. */
773 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
775 /* No selected route, this should only happen if the only route has been retracted,
776 * in which case we do not want to advertise it. */
779 if (0==tr_name_cmp(peer_gssname, trp_rentry_get_peer(route))) {
780 /* the selected entry goes through the peer we're reporting to, choose an alternate */
781 route=trps_find_best_route(trps, comm, realm, peer_gssname);
782 if ((route==NULL) || (!trp_metric_is_finite(trp_rentry_get_metric(route))))
783 route=NULL; /* don't advertise a nonexistent or retracted route */
788 /* returns an array of pointers to updates (*not* an array of updates). Returns number of entries
789 * via n_update parameter. (The allocated space will generally be larger than required, see note in
791 static TRP_RENTRY **trps_select_updates_for_peer(TALLOC_CTX *memctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, size_t *n_update)
794 TR_NAME **apc=trp_rtable_get_apcs(trps->rtable, &n_apc);
795 TR_NAME **realm=NULL;
798 TRP_RENTRY *best=NULL;
799 TRP_RENTRY **result=NULL;
802 /* Need to allocate space for the results. For simplicity, we just allocate a block
803 * with space for every route table entry to be returned. This is guaranteed to be large
804 * enough. If the routing table gets very large, this may be wasteful, but that seems
805 * unlikely to be significant in the near future. */
806 result=talloc_array(memctx, TRP_RENTRY *, trp_rtable_size(trps->rtable));
813 for (ii=0; ii<n_apc; ii++) {
814 realm=trp_rtable_get_apc_realms(trps->rtable, apc[ii], &n_realm);
815 for (jj=0; jj<n_realm; jj++) {
816 best=trps_select_realm_update(trps, apc[ii], realm[jj], peer_gssname);
818 result[n_used++]=best;
832 /* convert an rentry into a new trp update info record */
833 static TRP_INFOREC *trps_rentry_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_RENTRY *entry)
835 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
836 unsigned int linkcost=0;
839 linkcost=trp_peer_get_linkcost(trps_get_peer(trps,
840 trp_rentry_get_next_hop(entry)));
842 /* Note that we leave the next hop empty since the recipient fills that in.
843 * This is where we add the link cost (currently always 1) to the next peer. */
844 if ((trp_inforec_set_comm(rec, trp_rentry_dup_apc(entry)) != TRP_SUCCESS)
845 ||(trp_inforec_set_realm(rec, trp_rentry_dup_realm(entry)) != TRP_SUCCESS)
846 ||(trp_inforec_set_trust_router(rec, trp_rentry_dup_trust_router(entry)) != TRP_SUCCESS)
847 ||(trp_inforec_set_metric(rec, trp_rentry_get_metric(entry)+linkcost) != TRP_SUCCESS)
848 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
849 tr_err("trps_rentry_to_inforec: error creating route update.");
857 TRP_RC trps_scheduled_update(TRPS_INSTANCE *trps)
859 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
860 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
862 TR_MSG msg; /* not a pointer! */
864 TRP_RENTRY **update_list=NULL;
865 TRP_INFOREC *rec=NULL;
866 size_t n_updates=0, ii=0;
869 TR_NAME *peer_gssname=NULL;
872 tr_err("trps_scheduled_update: failed to allocate peer table iterator.");
873 talloc_free(tmp_ctx);
877 for (peer=trp_ptable_iter_first(iter, trps->ptable);
879 peer=trp_ptable_iter_next(iter))
881 peer_gssname=trp_peer_get_gssname(peer);
882 tr_debug("trps_scheduled_update: preparing scheduled route update for %.*s",
883 peer_gssname->len, peer_gssname->buf);
884 /* do not fill in peer, recipient does that */
885 update_list=trps_select_updates_for_peer(tmp_ctx, trps, peer_gssname, &n_updates);
886 tr_free_name(peer_gssname); peer_gssname=NULL;
887 if ((n_updates>0) && (update_list!=NULL)) {
888 tr_debug("trps_scheduled_update: sending %u update records.", (unsigned int)n_updates);
889 upd=trp_upd_new(tmp_ctx);
891 for (ii=0; ii<n_updates; ii++) {
892 rec=trps_rentry_to_inforec(tmp_ctx, trps, update_list[ii]);
894 tr_err("trps_scheduled_update: could not create all update records.");
898 trp_upd_add_inforec(upd, rec);
900 talloc_free(update_list);
903 /* now encode the update message */
904 tr_msg_set_trp_upd(&msg, upd);
905 encoded=tr_msg_encode(&msg);
907 tr_err("trps_scheduled_update: error encoding update.");
912 tr_debug("trps_scheduled_update: adding message to queue.");
913 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
914 tr_err("trps_scheduled_update: error queueing update.");
916 tr_debug("trps_scheduled_update: update queued successfully.");
919 tr_msg_free_encoded(encoded);
926 trp_ptable_iter_free(iter);
927 talloc_free(tmp_ctx);
931 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_RENTRY *route)
933 trp_rtable_add(trps->rtable, route); /* should return status */
937 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
939 return trp_ptable_add(trps->ptable, peer);
942 TRP_PEER *trps_get_peer(TRPS_INSTANCE *trps, TR_NAME *gssname)
944 return trp_ptable_find(trps->ptable, gssname);