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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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
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22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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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.
46 #include <trust_router/tr_name.h>
47 #include <trp_internal.h>
49 #include <trp_ptable.h>
50 #include <trp_rtable.h>
54 static int trps_destructor(void *object)
56 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
57 if (trps->rtable!=NULL)
58 trp_rtable_free(trps->rtable);
62 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
64 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
71 trps->update_interval=(struct timeval){0,0};
72 trps->sweep_interval=(struct timeval){0,0};
75 trps->mq=tr_mq_new(trps);
77 /* failed to allocate mq */
83 if (trps_init_rtable(trps) != TRP_SUCCESS) {
84 /* failed to allocate rtable */
89 talloc_set_destructor((void *)trps, trps_destructor);
94 /* create a new route table, first discarding an old one if necessary */
95 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
97 if (trps->rtable != NULL) {
98 trp_rtable_free(trps->rtable);
102 trps->rtable=trp_rtable_new();
103 if (trps->rtable==NULL) {
109 void trps_clear_rtable(TRPS_INSTANCE *trps)
111 trp_rtable_clear(trps->rtable);
114 void trps_free (TRPS_INSTANCE *trps)
120 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
122 return tr_mq_pop(trps->mq);
125 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
127 tr_mq_add(trps->mq, msg);
130 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
132 return trps->connect_interval.tv_sec;
135 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
137 trps->connect_interval.tv_sec=interval;
138 trps->connect_interval.tv_usec=0;
141 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
143 return trps->update_interval.tv_sec;
146 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
148 trps->update_interval.tv_sec=interval;
149 trps->update_interval.tv_usec=0;
152 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
154 return trps->sweep_interval.tv_sec;
157 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
159 trps->sweep_interval.tv_sec=interval;
160 trps->sweep_interval.tv_usec=0;
163 void trps_set_ctable(TRPS_INSTANCE *trps, TR_COMM_TABLE *comm)
165 if (trps->ctable!=NULL)
166 tr_comm_table_free(trps->ctable);
170 void trps_set_ptable(TRPS_INSTANCE *trps, TRP_PTABLE *ptable)
172 if (trps->ptable!=NULL)
173 trp_ptable_free(trps->ptable);
177 void trps_set_peer_status_callback(TRPS_INSTANCE *trps, void (*cb)(TRP_PEER *, void *), void *cookie)
179 TRP_PTABLE_ITER *iter=NULL;
181 if (trps->ptable==NULL)
184 iter=trp_ptable_iter_new(NULL);
185 for (peer=trp_ptable_iter_first(iter, trps->ptable); peer!=NULL; peer=trp_ptable_iter_next(iter))
186 trp_peer_set_conn_status_cb(peer, cb, cookie);
187 trp_ptable_iter_free(iter);
190 /* Get the label peers will know us by - needs to match trp_peer_get_label() output.
191 * There is no get, only dup, because we don't store the label except when requested. */
192 TR_NAME *trps_dup_label(TRPS_INSTANCE *trps)
194 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
196 char *s=talloc_asprintf(tmp_ctx, "%s:%u", trps->hostname, trps->port);
199 label=tr_new_name(s);
202 talloc_free(tmp_ctx);
206 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
208 TRPC_INSTANCE *cur=NULL;
210 TR_NAME *peer_servicename=trp_peer_get_servicename(peer);
212 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
213 name=trpc_get_gssname(cur);
214 if ((name!=NULL) && (0==tr_name_cmp(peer_servicename, name))) {
221 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
223 if (trps->conn==NULL)
226 trp_connection_append(trps->conn, new);
228 talloc_steal(trps, new);
231 /* ok to call more than once; guarantees connection no longer in the list.
232 * Caller is responsible for freeing the removed element afterwards. */
233 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
235 trps->conn=trp_connection_remove(trps->conn, remove);
238 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
240 if (trps->trpc==NULL)
243 trpc_append(trps->trpc, trpc);
245 talloc_steal(trps, trpc);
248 /* ok to call more than once; guarantees trpc no longer in the list.
249 * Caller is responsible for freeing the removed element afterwards. */
250 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
252 trps->trpc=trpc_remove(trps->trpc, remove);
255 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
257 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
258 TR_MQ_MSG *mq_msg=NULL;
261 TRPC_INSTANCE *trpc=NULL;
263 /* get the connection for this peer */
264 trpc=trps_find_trpc(trps, peer);
265 /* instead, let's let that happen and then clear the queue when an attempt to
268 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
270 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
271 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
272 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
273 trpc_mq_add(trpc, mq_msg);
276 talloc_free(tmp_ctx);
280 static int trps_listen (TRPS_INSTANCE *trps, int port)
287 struct sockaddr_storage storage;
288 struct sockaddr_in in4;
291 struct sockaddr_in *saddr = (struct sockaddr_in *) &addr.in4;
293 saddr->sin_port = htons (port);
294 saddr->sin_family = AF_INET;
295 saddr->sin_addr.s_addr = INADDR_ANY;
297 if (0 > (conn = socket (AF_INET, SOCK_STREAM, 0)))
300 setsockopt(conn, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
302 if (0 > (rc = bind (conn, (struct sockaddr *) saddr, sizeof(struct sockaddr_in))))
305 if (0 > (rc = listen(conn, 512)))
308 tr_debug("trps_listen: TRP Server listening on port %d", port);
312 /* get the currently selected route if available */
313 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
315 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
318 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
320 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
321 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
324 /* copy the result if you want to keep it */
325 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
327 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
331 return trp_route_get_next_hop(route);
335 /* mark a route as retracted */
336 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
338 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
339 trp_route_set_triggered(entry, 1);
342 /* is this route retracted? */
343 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
345 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
348 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
353 TRP_PEER *peer=NULL; /* entry in the peer table */
354 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
356 tr_debug("trps_read_message: started");
357 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
358 *(trp_connection_get_gssctx(conn)),
361 tr_debug("trps_read_message: error");
367 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
368 tr_debug("trps_read_message: %.*s", buflen, buf);
370 *msg=tr_msg_decode(buf, buflen);
375 conn_peer=trp_connection_get_peer(conn);
376 if (conn_peer==NULL) {
377 tr_err("trps_read_message: connection has no peer name");
381 peer=trps_get_peer_by_gssname(trps, conn_peer);
383 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
387 /* verify we received a message we support, otherwise drop it now */
388 switch (tr_msg_get_msg_type(*msg)) {
390 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
391 trp_upd_set_next_hop(tr_msg_get_trp_upd(*msg), trp_peer_get_server(peer), 0); /* TODO: 0 should be the configured TID port */
395 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
399 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
400 tr_msg_free_decoded(*msg);
402 return TRP_UNSUPPORTED;
408 int trps_get_listener(TRPS_INSTANCE *trps,
409 TRPS_MSG_FUNC msg_handler,
410 TRP_AUTH_FUNC auth_handler,
411 const char *hostname,
417 if (0 > (listen = trps_listen(trps, port))) {
419 if (0 == strerror_r(errno, errbuf, 256)) {
420 tr_debug("trps_get_listener: Error opening port %d: %s.", port, errbuf);
422 tr_debug("trps_get_listener: Unknown error openining port %d.", port);
427 /* opening port succeeded */
428 tr_debug("trps_get_listener: Opened port %d.", port);
430 /* make this socket non-blocking */
431 if (0 != fcntl(listen, F_SETFL, O_NONBLOCK)) {
432 tr_debug("trps_get_listener: Error setting O_NONBLOCK.");
439 /* store the caller's request handler & cookie */
440 trps->msg_handler = msg_handler;
441 trps->auth_handler = auth_handler;
442 trps->hostname = talloc_strdup(trps, hostname);
444 trps->cookie = cookie;
450 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
452 /* try to establish a GSS context */
453 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
454 tr_notice("trps_authorize_connection: failed to authorize connection");
455 trp_connection_close(conn);
458 tr_notice("trps_authorize_connection: authorized connection");
462 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
467 /* loop as long as the connection exists */
468 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
469 rc=trps_read_message(trps, conn, &msg);
472 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
476 trp_connection_close(conn);
480 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
484 tr_debug("trps_handle_connection: connection closed.");
487 /* TODO: check realm/comm, now part of the update instead of inforec */
488 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
491 tr_notice("trps_validate_update: null TRP update.");
495 if (trp_upd_get_realm(upd)==NULL) {
496 tr_notice("trps_validate_update: received TRP update without realm.");
500 if (trp_upd_get_comm(upd)==NULL) {
501 tr_notice("trps_validate_update: received TRP update without community.");
505 if (trp_upd_get_inforec(upd)==NULL) {
506 tr_notice("trps_validate_update: received TRP update with no info records.");
510 if (trp_upd_get_peer(upd)==NULL) {
511 tr_notice("trps_validate_update: received TRP update without origin peer information.");
519 /* ensure that the update could be accepted if feasible */
520 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
522 switch(trp_inforec_get_type(rec)) {
523 case TRP_INFOREC_TYPE_ROUTE:
524 if ((trp_inforec_get_trust_router(rec)==NULL)
525 || (trp_inforec_get_next_hop(rec)==NULL)) {
526 tr_debug("trps_validate_inforec: missing record info.");
530 /* check for valid metric */
531 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
532 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
536 /* check for valid interval */
537 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
538 tr_debug("trps_validate_inforec: invalid interval.");
543 case TRP_INFOREC_TYPE_COMMUNITY:
544 /* TODO: validate community updates */
548 tr_notice("trps_validate_inforec: unsupported record type.");
549 return TRP_UNSUPPORTED;
555 /* link cost to a peer */
556 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
561 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
563 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
565 return TRP_METRIC_INFINITY;
566 return trp_route_get_metric(entry) + trps_cost(trps, peer);
569 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
571 unsigned int rec_metric=trp_inforec_get_metric(rec);
572 unsigned int new_metric=0;
573 unsigned int current_metric=0;
574 TR_NAME *next_hop=NULL;
576 /* we check these in the validation stage, but just in case... */
577 if (trp_metric_is_invalid(rec_metric))
580 /* retractions (aka infinite metrics) are always feasible */
581 if (trp_metric_is_infinite(rec_metric))
584 /* updates from our current next hop are always feasible*/
585 next_hop=trps_get_next_hop(trps, comm, realm);
587 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
592 /* compare the existing metric we advertise to what we would advertise
593 * if we accept this update */
594 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
595 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
596 if (new_metric <= current_metric)
602 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
603 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
605 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
606 if (0!=clock_gettime(CLOCK_REALTIME, ts)) {
607 tr_err("trps_compute_expiry: could not read realtime clock.");
611 ts->tv_sec += small_factor*interval;
615 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
617 TRP_ROUTE *entry=NULL;
619 entry=trp_rtable_get_entry(trps->rtable,
620 trp_upd_get_comm(upd),
621 trp_upd_get_realm(upd),
622 trp_inforec_get_next_hop(rec));
624 entry=trp_route_new(NULL);
626 tr_err("trps_accept_update: unable to allocate new entry.");
630 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
631 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
632 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
633 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
634 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
635 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
636 if ((trp_route_get_comm(entry)==NULL)
637 ||(trp_route_get_realm(entry)==NULL)
638 ||(trp_route_get_peer(entry)==NULL)
639 ||(trp_route_get_trust_router(entry)==NULL)
640 ||(trp_route_get_next_hop(entry)==NULL)) {
641 /* at least one field could not be allocated */
642 tr_err("trps_accept_update: unable to allocate all fields for entry.");
643 trp_route_free(entry);
646 trp_rtable_add(trps->rtable, entry);
649 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
650 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
651 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
652 * time unset on a new route entry. */
653 tr_debug("trps_accept_update: accepting route update.");
654 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
655 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
657 /* check whether the trust router has changed */
658 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
659 trp_inforec_get_trust_router(rec))) {
660 /* The name changed. Set this route as triggered. */
661 tr_debug("trps_accept_update: trust router for route changed.");
662 trp_route_set_triggered(entry, 1);
663 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
665 if (!trps_route_retracted(trps, entry)) {
666 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
667 trp_route_set_expiry(entry, trps_compute_expiry(trps,
668 trp_route_get_interval(entry),
669 trp_route_get_expiry(entry)));
675 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
677 TRP_ROUTE *route=NULL;
680 /* determine feasibility */
681 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
682 tr_debug("trps_handle_update: record feasibility=%d", feas);
684 /* do we have an existing route? */
685 route=trps_get_route(trps,
686 trp_upd_get_comm(upd),
687 trp_upd_get_realm(upd),
688 trp_upd_get_peer(upd));
690 /* there was a route table entry already */
691 tr_debug("trps_handle_updates: route entry already exists.");
693 /* Update is feasible. Accept it. */
694 trps_accept_update(trps, upd, rec);
696 /* Update is infeasible. Ignore it unless the trust router has changed. */
697 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
698 trp_inforec_get_trust_router(rec))) {
699 /* the trust router associated with the route has changed, treat update as a retraction */
700 trps_retract_route(trps, route);
704 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
705 tr_debug("trps_handle_update: no route entry exists yet.");
706 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
707 trps_accept_update(trps, upd, rec);
713 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
716 TR_NAME *this_name=NULL;
720 return 0; /* no provenance list, so it has no names in it */
722 /* now check to see if name is in the provenance */
723 for (ii=0; ii<json_array_size(prov); ii++) {
724 s=json_string_value(json_array_get(prov, ii));
726 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
730 this_name=tr_new_name(s);
731 if (this_name==NULL) {
732 tr_debug("trps_name_in_provenance: unable to allocate name.");
735 if (0==tr_name_cmp(name, this_name)) {
736 tr_free_name(this_name);
739 tr_free_name(this_name);
744 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
746 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
747 TR_COMM *comm=tr_comm_new(tmp_ctx);
750 tr_debug("trps_create_new_comm: unable to allocate new community.");
753 /* fill in the community with info */
754 tr_comm_set_id(comm, tr_dup_name(comm_id));
755 if (tr_comm_get_id(comm)==NULL) {
756 tr_debug("trps_create_new_comm: unable to allocate community name.");
760 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
761 if (trp_inforec_get_apcs(rec)!=NULL) {
762 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
763 if (tr_comm_get_apcs(comm)==NULL) {
764 tr_debug("trps_create_new_comm: unable to allocate APC list.");
769 if (trp_inforec_get_owner_realm(rec)!=NULL) {
770 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
771 if (tr_comm_get_owner_realm(comm)==NULL) {
772 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
777 if (trp_inforec_get_owner_contact(rec)!=NULL) {
778 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
779 if (tr_comm_get_owner_contact(comm)==NULL) {
780 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
785 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
786 talloc_steal(mem_ctx, comm);
789 talloc_free(tmp_ctx);
793 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
795 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
796 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
799 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
802 /* fill in the realm */
803 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
804 if (tr_rp_realm_get_id(rp)==NULL) {
805 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
809 talloc_steal(mem_ctx, rp);
812 talloc_free(tmp_ctx);
816 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
818 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
819 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
822 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
825 /* fill in the realm */
826 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
827 if (tr_idp_realm_get_id(idp)==NULL) {
828 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
832 if (trp_inforec_get_apcs(rec)!=NULL) {
833 tr_idp_realm_set_apcs(idp, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
834 if (tr_idp_realm_get_apcs(idp)==NULL) {
835 tr_debug("trps_create_new_idp_realm: unable to allocate APC list.");
840 idp->origin=TR_REALM_DISCOVERED;
842 talloc_steal(mem_ctx, idp);
845 talloc_free(tmp_ctx);
849 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
851 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
852 TR_NAME *comm_id=trp_upd_get_comm(upd);
853 TR_NAME *realm_id=trp_upd_get_realm(upd);
854 TR_NAME *origin_id=NULL;
855 TR_NAME *our_peer_label=NULL;
857 TR_RP_REALM *rp_realm=NULL;
858 TR_IDP_REALM *idp_realm=NULL;
859 struct timespec expiry={0,0};
862 if ((comm_id==NULL) || (realm_id==NULL))
865 origin_id=trp_inforec_dup_origin(rec);
869 /* see whether we want to add this */
870 our_peer_label=trps_dup_label(trps);
871 if (our_peer_label==NULL) {
872 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
876 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
877 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid loop.");
879 /* no loop occurring, accept the update */
880 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
882 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
883 comm_id->len, comm_id->buf);
884 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
886 tr_debug("trps_handle_inforec_comm: unable to create new community.");
889 tr_comm_table_add_comm(trps->ctable, comm);
891 /* TODO: see if other comm data match the new inforec and update or complain */
893 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
894 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
897 switch (trp_inforec_get_role(rec)) {
899 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
900 if (rp_realm==NULL) {
901 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
902 realm_id->len, realm_id->buf);
903 rp_realm=trps_create_new_rp_realm(tmp_ctx, realm_id, rec);
904 if (rp_realm==NULL) {
905 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
906 /* we may leave an unused community in the table, but it will only last until
907 * the next table sweep if it does not get any realms before that happens */
910 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
912 /* TODO: if realm existed, see if data match the new inforec and update or complain */
913 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
914 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
915 realm_id->len, realm_id->buf,
916 comm_id->len, comm_id->buf,
917 origin_id->len, origin_id->buf);
920 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
921 if (idp_realm==NULL) {
922 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
923 realm_id->len, realm_id->buf);
924 idp_realm=trps_create_new_idp_realm(tmp_ctx, realm_id, rec);
925 if (idp_realm==NULL) {
926 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
927 /* we may leave an unused community in the table, but it will only last until
928 * the next table sweep if it does not get any realms before that happens */
931 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
933 /* TODO: if realm existed, see if data match the new inforec and update or complain */
934 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
935 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
936 realm_id->len, realm_id->buf,
937 comm_id->len, comm_id->buf,
938 origin_id->len, origin_id->buf);
941 tr_debug("trps_handle_inforec_comm: unable to add realm.");
949 if (our_peer_label!=NULL)
950 tr_free_name(our_peer_label);
952 tr_free_name(origin_id);
953 talloc_free(tmp_ctx);
957 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
959 TRP_INFOREC *rec=NULL;
961 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
962 tr_notice("trps_handle_update: received invalid TRP update.");
966 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
967 /* validate/sanity check the record update */
968 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
969 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
974 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
975 switch (trp_inforec_get_type(rec)) {
976 case TRP_INFOREC_TYPE_ROUTE:
977 tr_debug("trps_handle_update: handling route inforec.");
978 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
979 tr_notice("trps_handle_update: error handling route inforec.");
981 case TRP_INFOREC_TYPE_COMMUNITY:
982 tr_debug("trps_handle_update: handling community inforec.");
983 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
984 tr_notice("trps_handle_update: error handling community inforec.");
987 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
994 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
997 tr_notice("trps_validate_request: null TRP request.");
1001 if (trp_req_get_comm(req)==NULL) {
1002 tr_notice("trps_validate_request: received TRP request with null community.");
1006 if (trp_req_get_realm(req)==NULL) {
1007 tr_notice("trps_validate_request: received TRP request with null realm.");
1011 if (trp_req_get_peer(req)==NULL) {
1012 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1019 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1020 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1023 TR_NAME *exclude_peer)
1025 TRP_ROUTE **entry=NULL;
1026 TRP_ROUTE *best=NULL;
1029 unsigned int kk_min=0;
1030 unsigned int min_metric=TRP_METRIC_INFINITY;
1032 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1033 for (kk=0; kk<n_entry; kk++) {
1034 if (trp_route_get_metric(entry[kk]) < min_metric) {
1035 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1038 min_metric=trp_route_get_metric(entry[kk]);
1042 if (trp_metric_is_finite(min_metric))
1049 /* TODO: think this through more carefully. At least ought to add hysteresis
1050 * to avoid flapping between routers or routes. */
1051 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1053 size_t n_comm=0, ii=0;
1054 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1055 size_t n_realm=0, jj=0;
1056 TR_NAME **realm=NULL;
1057 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1058 unsigned int best_metric=0, cur_metric=0;
1060 for (ii=0; ii<n_comm; ii++) {
1061 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1062 for (jj=0; jj<n_realm; jj++) {
1063 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1064 if (best_route==NULL)
1065 best_metric=TRP_METRIC_INFINITY;
1067 best_metric=trp_route_get_metric(best_route);
1069 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1070 if (cur_route!=NULL) {
1071 cur_metric=trp_route_get_metric(cur_route);
1072 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1073 /* The new route has a lower metric than the previous, and is finite. Accept. */
1074 trp_route_set_selected(cur_route, 0);
1075 trp_route_set_selected(best_route, 1);
1076 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1077 trp_route_set_selected(cur_route, 0);
1078 } else if (trp_metric_is_finite(best_metric)) {
1079 trp_route_set_selected(best_route, 1);
1084 realm=NULL; n_realm=0;
1088 comm=NULL; n_comm=0;
1093 /* true if curtime >= expiry */
1094 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1096 return ((curtime->tv_sec > expiry->tv_sec)
1097 || ((curtime->tv_sec == expiry->tv_sec)
1098 &&(curtime->tv_nsec >= expiry->tv_nsec)));
1101 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1102 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1103 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1105 struct timespec sweep_time={0,0};
1106 TRP_ROUTE **entry=NULL;
1110 /* use a single time for the entire sweep */
1111 if (0!=clock_gettime(CLOCK_REALTIME, &sweep_time)) {
1112 tr_err("trps_sweep_routes: could not read realtime clock.");
1113 sweep_time.tv_sec=0;
1114 sweep_time.tv_nsec=0;
1118 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
1120 /* loop over the entries */
1121 for (ii=0; ii<n_entry; ii++) {
1122 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1123 tr_debug("trps_sweep_routes: route expired.");
1124 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1126 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1127 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1130 /* set metric to infinity and reset timer */
1131 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1132 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1133 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1134 trp_route_get_interval(entry[ii]),
1135 trp_route_get_expiry(entry[ii])));
1145 static char *timespec_to_str(struct timespec *ts)
1150 if (localtime_r(&(ts->tv_sec), &tm)==NULL)
1153 s=malloc(40); /* long enough to contain strftime result */
1157 if (strftime(s, 40, "%F %T", &tm)==0) {
1165 /* Sweep for expired communities/realms/memberships. */
1166 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1168 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1169 struct timespec sweep_time={0,0};
1170 TR_COMM_MEMB *memb=NULL;
1171 TR_COMM_ITER *iter=NULL;
1172 TRP_RC rc=TRP_ERROR;
1174 /* use a single time for the entire sweep */
1175 if (0!=clock_gettime(CLOCK_REALTIME, &sweep_time)) {
1176 tr_err("trps_sweep_ctable: could not read realtime clock.");
1177 sweep_time.tv_sec=0;
1178 sweep_time.tv_nsec=0;
1182 /* iterate all memberships */
1183 iter=tr_comm_iter_new(tmp_ctx);
1185 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1189 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1191 memb=tr_comm_memb_iter_all_next(iter)) {
1192 if (tr_comm_memb_get_origin(memb)==NULL)
1193 continue; /* do not expire local entries */
1195 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1196 if (tr_comm_memb_get_times_expired(memb)>0) {
1197 /* Already expired once; flush. */
1198 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1199 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1200 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1201 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1202 timespec_to_str(tr_comm_memb_get_expiry(memb)));
1203 tr_comm_table_remove_memb(trps->ctable, memb);
1204 tr_comm_memb_free(memb);
1206 /* This is the first expiration. Note this and reset the expiry time. */
1207 tr_comm_memb_expire(memb);
1208 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1209 tr_debug("trps_sweep_ctable: community membership expired, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1210 timespec_to_str(tr_comm_memb_get_expiry(memb)),
1211 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1212 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1213 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1218 /* get rid of any unreferenced realms, etc */
1219 tr_comm_table_sweep(trps->ctable);
1222 talloc_free(tmp_ctx);
1227 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1229 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1230 return TRP_METRIC_INVALID;
1232 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1233 return TRP_METRIC_INFINITY;
1235 if (trp_metric_is_finite(m1+m2))
1238 return TRP_METRIC_INFINITY;
1241 /* convert an rentry into a new trp update info record */
1242 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1244 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1245 unsigned int linkcost=0;
1248 if (trp_route_is_local(route))
1251 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1252 trp_route_get_peer(route)));
1255 /* Note that we leave the next hop empty since the recipient fills that in.
1256 * This is where we add the link cost (currently always 1) to the next peer. */
1257 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1258 ||(trp_inforec_set_metric(rec,
1259 trps_metric_add(trp_route_get_metric(route),
1260 linkcost)) != TRP_SUCCESS)
1261 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1262 tr_err("trps_route_to_inforec: error creating route update.");
1270 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1272 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1273 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1274 TRP_INFOREC *rec=NULL;
1277 tr_err("trps_route_to_upd: could not create update message.");
1280 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1281 if (trp_upd_get_realm(upd)==NULL) {
1282 tr_err("trps_route_to_upd: could not copy realm.");
1283 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1286 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1287 if (trp_upd_get_comm(upd)==NULL) {
1288 tr_err("trps_route_to_upd: could not copy comm.");
1289 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1292 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1294 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1295 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1296 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1297 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1300 trp_upd_add_inforec(upd, rec);
1303 talloc_steal(mem_ctx, upd);
1306 talloc_free(tmp_ctx);
1310 /* select the correct route to comm/realm to be announced to peer */
1311 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1315 /* Take the currently selected route unless it is through the peer we're sending the update to.
1316 * I.e., enforce the split horizon rule. */
1317 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1319 /* No selected route, this should only happen if the only route has been retracted,
1320 * in which case we do not want to advertise it. */
1323 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1324 trp_route_get_peer(route)->buf);
1325 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1326 tr_debug("trps_select_realm_update: matched, finding alternate route");
1327 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1328 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1329 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1330 return NULL; /* don't advertise a nonexistent or retracted route */
1335 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1336 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1338 TRPS_INSTANCE *trps,
1339 TR_NAME *peer_gssname,
1343 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1344 TR_NAME **realm=NULL;
1347 TRP_ROUTE *best=NULL;
1353 for (ii=0; ii<n_comm; ii++) {
1354 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1355 for (jj=0; jj<n_realm; jj++) {
1356 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1357 /* If we found a route, add it to the list. If triggered!=0, then only
1358 * add triggered routes. */
1359 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1360 upd=trps_route_to_upd(mem_ctx, trps, best);
1362 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1365 g_ptr_array_add(updates, upd);
1381 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1383 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1384 TRP_INFOREC *rec=NULL;
1390 comm=tr_comm_memb_get_comm(memb);
1391 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1395 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1400 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1405 if ((NULL!=tr_comm_get_apcs(comm)) &&
1406 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1407 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1408 (NULL==trp_inforec_get_apcs(rec)))) {
1413 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1414 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1415 (NULL==trp_inforec_get_owner_realm(rec)))) {
1420 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1421 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1422 (NULL==trp_inforec_get_owner_contact(rec)))) {
1427 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1428 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1433 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1439 talloc_steal(mem_ctx, rec);
1442 talloc_free(tmp_ctx);
1446 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1447 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1449 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1450 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1451 TRP_INFOREC *rec=NULL;
1452 TR_COMM_ITER *iter=NULL;
1453 TR_COMM_MEMB *memb=NULL;
1458 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1459 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1460 /* leave peer empty */
1462 iter=tr_comm_iter_new(tmp_ctx);
1464 tr_err("trps_comm_update: unable to allocate iterator.");
1469 /* now add inforecs */
1470 switch (realm->role) {
1472 memb=tr_comm_table_find_idp_memb(trps->ctable,
1473 tr_realm_get_id(realm),
1474 tr_comm_get_id(comm));
1477 memb=tr_comm_table_find_rp_memb(trps->ctable,
1478 tr_realm_get_id(realm),
1479 tr_comm_get_id(comm));
1485 for (memb=tr_comm_memb_iter_first(iter, memb);
1487 memb=tr_comm_memb_iter_next(iter)) {
1488 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1490 tr_err("trps_comm_update: unable to allocate inforec.");
1494 trp_upd_add_inforec(upd, rec);
1498 if (trp_upd_get_inforec(upd)==NULL)
1499 upd=NULL; /* no inforecs, no reason to send the update */
1501 talloc_steal(mem_ctx, upd); /* success! */
1504 talloc_free(tmp_ctx);
1508 /* Find all community updates to send to a peer and add these as TR_UPD records
1509 * to the updates GPtrArray. */
1510 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1512 TRPS_INSTANCE *trps,
1513 TR_NAME *peer_gssname,
1516 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1517 TR_COMM_ITER *comm_iter=NULL;
1519 TR_COMM_ITER *realm_iter=NULL;
1520 TR_REALM *realm=NULL;
1522 TRP_RC rc=TRP_ERROR;
1524 /* currently do not send any communities on triggered updates */
1530 comm_iter=tr_comm_iter_new(tmp_ctx);
1531 realm_iter=tr_comm_iter_new(tmp_ctx);
1532 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1533 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1538 /* do every community */
1539 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1541 comm=tr_comm_table_iter_next(comm_iter)) {
1542 /* do every realm in this community */
1543 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1544 tr_comm_get_id(comm)->len,
1545 tr_comm_get_id(comm)->buf);
1546 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1548 realm=tr_realm_iter_next(realm_iter)) {
1549 /* get the update for this comm/realm */
1550 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1551 tr_realm_get_id(realm)->len,
1552 tr_realm_get_id(realm)->buf);
1553 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1555 g_ptr_array_add(updates, upd);
1560 talloc_free(tmp_ctx);
1565 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1566 static void trps_trp_upd_destroy(gpointer data)
1568 trp_upd_free((TRP_UPD *)data);
1571 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1572 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1574 TRP_UPDATE_TYPE update_type,
1578 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1579 TR_MSG msg; /* not a pointer! */
1581 TRP_ROUTE *route=NULL;
1584 TRP_RC rc=TRP_ERROR;
1585 TR_NAME *peer_label=trp_peer_get_label(peer);
1586 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1588 if (updates==NULL) {
1589 tr_err("trps_update_one_peer: unable to allocate updates array.");
1594 switch (update_type) {
1595 case TRP_UPDATE_TRIGGERED:
1596 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1597 peer_label->len, peer_label->buf);
1599 case TRP_UPDATE_SCHEDULED:
1600 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1601 peer_label->len, peer_label->buf);
1603 case TRP_UPDATE_REQUESTED:
1604 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1605 peer_label->len, peer_label->buf);
1608 tr_err("trps_update_one_peer: invalid update type requested.");
1613 /* First, gather route updates. */
1614 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1615 if ((comm==NULL) && (realm==NULL)) {
1617 rc=trps_select_route_updates_for_peer(tmp_ctx,
1621 update_type==TRP_UPDATE_TRIGGERED);
1622 } else if ((comm!=NULL) && (realm!=NULL)) {
1623 /* a single community/realm was requested */
1624 route=trps_select_realm_update(trps, comm, realm, peer_label);
1626 /* we have no actual update to send back, MUST send a retraction */
1627 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1628 route=trp_route_new(tmp_ctx);
1629 trp_route_set_comm(route, tr_dup_name(comm));
1630 trp_route_set_realm(route, tr_dup_name(realm));
1631 trp_route_set_peer(route, tr_new_name(""));
1632 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1633 trp_route_set_trust_router(route, tr_new_name(""));
1634 trp_route_set_next_hop(route, tr_new_name(""));
1636 upd=trps_route_to_upd(tmp_ctx, trps, route);
1638 tr_err("trps_update_one_peer: unable to allocate route update.");
1642 g_ptr_array_add(updates, upd);
1644 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1649 /* Second, gather community updates */
1650 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1651 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1653 /* see if we have anything to send */
1654 if (updates->len<=0)
1655 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1657 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1658 for (ii=0; ii<updates->len; ii++) {
1659 upd=(TRP_UPD *)g_ptr_array_index(updates, ii);
1660 /* now encode the update message */
1661 tr_msg_set_trp_upd(&msg, upd);
1662 encoded=tr_msg_encode(&msg);
1663 if (encoded==NULL) {
1664 tr_err("trps_update_one_peer: error encoding update.");
1669 tr_debug("trps_update_one_peer: adding message to queue.");
1670 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1671 tr_err("trps_update_one_peer: error queueing update.");
1673 tr_debug("trps_update_one_peer: update queued successfully.");
1675 tr_msg_free_encoded(encoded);
1684 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1685 talloc_free(tmp_ctx);
1689 /* all routes/communities to all peers */
1690 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1692 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1693 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1694 TRP_PEER *peer=NULL;
1695 TRP_RC rc=TRP_SUCCESS;
1697 if (trps->ptable==NULL)
1698 return TRP_SUCCESS; /* no peers, nothing to do */
1701 tr_err("trps_update: failed to allocate peer table iterator.");
1702 talloc_free(tmp_ctx);
1706 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1707 (peer!=NULL) && (rc==TRP_SUCCESS);
1708 peer=trp_ptable_iter_next(iter))
1710 if (!trps_peer_connected(trps, peer)) {
1711 TR_NAME *peer_label=trp_peer_get_label(peer);
1712 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1713 peer_label->len, peer_label->buf);
1716 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1719 tr_debug("trps_update: rc=%u after attempting update.", rc);
1720 trp_ptable_iter_free(iter);
1721 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1722 talloc_free(tmp_ctx);
1726 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1728 trp_rtable_add(trps->rtable, route); /* should return status */
1732 /* steals the peer object */
1733 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1735 if (trps->ptable==NULL) {
1736 trps->ptable=trp_ptable_new(trps);
1737 if (trps->ptable==NULL)
1740 return trp_ptable_add(trps->ptable, peer);
1743 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1745 if (trps->ptable==NULL)
1748 return trp_ptable_find_gss_name(trps->ptable, gssname);
1751 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1753 if (trps->ptable==NULL)
1756 return trp_ptable_find_servicename(trps->ptable, servicename);
1759 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1761 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1765 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1772 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1775 TR_NAME *realm=NULL;
1777 tr_debug("trps_handle_request: handling TRP request.");
1779 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1780 tr_notice("trps_handle_request: received invalid TRP request.");
1784 if (!trp_req_is_wildcard(req)) {
1785 comm=trp_req_get_comm(req);
1786 realm=trp_req_get_realm(req);
1787 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1788 comm->len, comm->buf, realm->len, realm->buf);
1790 tr_debug("trps_handle_request: all routes requested.");
1791 /* leave comm/realm NULL */
1793 return trps_update_one_peer(trps,
1794 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1795 TRP_UPDATE_REQUESTED,
1801 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1803 TRP_RC rc=TRP_ERROR;
1805 switch (tr_msg_get_msg_type(tr_msg)) {
1807 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1808 if (rc==TRP_SUCCESS) {
1809 rc=trps_update_active_routes(trps);
1810 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1815 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1819 /* unknown error or one we don't care about (e.g., TID messages) */
1824 /* send wildcard route request to a peer */
1825 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1827 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1828 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1829 TR_MSG msg; /* not a pointer */
1830 TRP_REQ *req=trp_req_new(tmp_ctx);
1832 TRP_RC rc=TRP_ERROR;
1835 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1839 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1840 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1845 tr_msg_set_trp_req(&msg, req);
1846 encoded=tr_msg_encode(&msg);
1847 if (encoded==NULL) {
1848 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1853 tr_debug("trps_wildcard_route_req: adding message to queue.");
1854 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1855 tr_err("trps_wildcard_route_req: error queueing request.");
1858 tr_debug("trps_wildcard_route_req: request queued successfully.");
1864 tr_msg_free_encoded(encoded);
1868 talloc_free(tmp_ctx);