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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14 * documentation and/or other materials provided with the distribution.
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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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30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
31 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 #include <trust_router/tr_name.h>
48 #include <trp_internal.h>
50 #include <trp_ptable.h>
51 #include <trp_rtable.h>
55 static int trps_destructor(void *object)
57 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
58 if (trps->rtable!=NULL)
59 trp_rtable_free(trps->rtable);
63 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
65 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
72 trps->update_interval=(struct timeval){0,0};
73 trps->sweep_interval=(struct timeval){0,0};
76 trps->mq=tr_mq_new(trps);
78 /* failed to allocate mq */
84 if (trps_init_rtable(trps) != TRP_SUCCESS) {
85 /* failed to allocate rtable */
90 talloc_set_destructor((void *)trps, trps_destructor);
95 /* create a new route table, first discarding an old one if necessary */
96 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
98 if (trps->rtable != NULL) {
99 trp_rtable_free(trps->rtable);
103 trps->rtable=trp_rtable_new();
104 if (trps->rtable==NULL) {
110 void trps_clear_rtable(TRPS_INSTANCE *trps)
112 trp_rtable_clear(trps->rtable);
115 void trps_free (TRPS_INSTANCE *trps)
121 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
123 return tr_mq_pop(trps->mq, 0);
126 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
128 tr_mq_add(trps->mq, msg);
131 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
133 return trps->connect_interval.tv_sec;
136 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
138 trps->connect_interval.tv_sec=interval;
139 trps->connect_interval.tv_usec=0;
142 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
144 return trps->update_interval.tv_sec;
147 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
149 trps->update_interval.tv_sec=interval;
150 trps->update_interval.tv_usec=0;
153 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
155 return trps->sweep_interval.tv_sec;
158 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
160 trps->sweep_interval.tv_sec=interval;
161 trps->sweep_interval.tv_usec=0;
164 void trps_set_ctable(TRPS_INSTANCE *trps, TR_COMM_TABLE *comm)
169 void trps_set_ptable(TRPS_INSTANCE *trps, TRP_PTABLE *ptable)
171 if (trps->ptable!=NULL)
172 trp_ptable_free(trps->ptable);
176 void trps_set_peer_status_callback(TRPS_INSTANCE *trps, void (*cb)(TRP_PEER *, void *), void *cookie)
178 TRP_PTABLE_ITER *iter=NULL;
180 if (trps->ptable==NULL)
183 iter=trp_ptable_iter_new(NULL);
184 for (peer=trp_ptable_iter_first(iter, trps->ptable); peer!=NULL; peer=trp_ptable_iter_next(iter))
185 trp_peer_set_conn_status_cb(peer, cb, cookie);
186 trp_ptable_iter_free(iter);
189 /* Get the label peers will know us by - needs to match trp_peer_get_label() output.
190 * There is no get, only dup, because we don't store the label except when requested. */
191 TR_NAME *trps_dup_label(TRPS_INSTANCE *trps)
193 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
195 char *s=talloc_asprintf(tmp_ctx, "%s:%u", trps->hostname, trps->port);
198 label=tr_new_name(s);
201 talloc_free(tmp_ctx);
205 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
207 TRPC_INSTANCE *cur=NULL;
209 TR_NAME *peer_servicename=trp_peer_get_servicename(peer);
211 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
212 name=trpc_get_gssname(cur);
213 if ((name!=NULL) && (0==tr_name_cmp(peer_servicename, name))) {
220 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
222 if (trps->conn==NULL)
225 trp_connection_append(trps->conn, new);
227 talloc_steal(trps, new);
230 /* ok to call more than once; guarantees connection no longer in the list.
231 * Caller is responsible for freeing the removed element afterwards. */
232 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
234 trps->conn=trp_connection_remove(trps->conn, remove);
237 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
239 if (trps->trpc==NULL)
242 trpc_append(trps->trpc, trpc);
244 talloc_steal(trps, trpc);
247 /* ok to call more than once; guarantees trpc no longer in the list.
248 * Caller is responsible for freeing the removed element afterwards. */
249 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
251 trps->trpc=trpc_remove(trps->trpc, remove);
254 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
256 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
257 TR_MQ_MSG *mq_msg=NULL;
260 TRPC_INSTANCE *trpc=NULL;
262 /* get the connection for this peer */
263 trpc=trps_find_trpc(trps, peer);
264 /* instead, let's let that happen and then clear the queue when an attempt to
267 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
269 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
270 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
271 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
272 trpc_mq_add(trpc, mq_msg);
275 talloc_free(tmp_ctx);
279 /* Listens on all interfaces. Returns number of sockets opened. Their
280 * descriptors are stored in *fd_out, which should point to space for
281 * up to max_fd of them. */
282 static size_t trps_listen(TRPS_INSTANCE *trps, int port, int *fd_out, size_t max_fd)
287 struct addrinfo *ai=NULL;
288 struct addrinfo *ai_head=NULL;
289 struct addrinfo hints={.ai_flags=AI_PASSIVE,
290 .ai_family=AF_UNSPEC,
291 .ai_socktype=SOCK_STREAM,
292 .ai_protocol=IPPROTO_TCP};
296 port_str=talloc_asprintf(NULL, "%d", port);
297 if (port_str==NULL) {
298 tr_debug("trps_listen: unable to allocate port.");
301 getaddrinfo(NULL, port_str, &hints, &ai_head);
302 talloc_free(port_str);
304 for (ai=ai_head,n_opened=0; (ai!=NULL)&&(n_opened<max_fd); ai=ai->ai_next) {
305 if (0 > (conn = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol))) {
306 tr_debug("trps_listen: unable to open socket.");
311 if (0!=setsockopt(conn, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)))
312 tr_debug("trps_listen: unable to set SO_REUSEADDR."); /* not fatal? */
314 if (ai->ai_family==AF_INET6) {
315 /* don't allow IPv4-mapped IPv6 addresses (per RFC4942, not sure
316 * if still relevant) */
317 if (0!=setsockopt(conn, IPPROTO_IPV6, IPV6_V6ONLY, &optval, sizeof(optval))) {
318 tr_debug("trps_listen: unable to set IPV6_V6ONLY. Skipping interface.");
324 rc=bind(conn, ai->ai_addr, ai->ai_addrlen);
326 tr_debug("trps_listen: unable to bind to socket.");
331 if (0>listen(conn, 512)) {
332 tr_debug("trps_listen: unable to listen on bound socket.");
337 /* ok, this one worked. Save it */
338 fd_out[n_opened++]=conn;
340 freeaddrinfo(ai_head);
343 tr_debug("trps_listen: no addresses available for listening.");
347 tr_debug("trps_listen: TRP Server listening on port %d on %d socket%s",
350 (n_opened==1)?"":"s");
355 /* get the currently selected route if available */
356 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
358 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
361 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
363 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
364 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
367 /* copy the result if you want to keep it */
368 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
370 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
374 return trp_route_get_next_hop(route);
378 /* mark a route as retracted */
379 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
381 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
382 trp_route_set_triggered(entry, 1);
385 /* is this route retracted? */
386 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
388 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
391 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
396 TRP_PEER *peer=NULL; /* entry in the peer table */
397 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
399 tr_debug("trps_read_message: started");
400 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
401 *(trp_connection_get_gssctx(conn)),
404 tr_debug("trps_read_message: error");
410 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
411 tr_debug("trps_read_message: %.*s", buflen, buf);
413 *msg=tr_msg_decode(buf, buflen);
418 conn_peer=trp_connection_get_peer(conn);
419 if (conn_peer==NULL) {
420 tr_err("trps_read_message: connection has no peer name");
424 peer=trps_get_peer_by_gssname(trps, conn_peer);
426 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
430 /* verify we received a message we support, otherwise drop it now */
431 switch (tr_msg_get_msg_type(*msg)) {
433 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
434 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 */
435 /* update provenance if necessary */
436 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
440 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
444 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
445 tr_msg_free_decoded(*msg);
447 return TRP_UNSUPPORTED;
453 int trps_get_listener(TRPS_INSTANCE *trps,
454 TRPS_MSG_FUNC msg_handler,
455 TRP_AUTH_FUNC auth_handler,
456 const char *hostname,
465 n_fd=trps_listen(trps, port, fd_out, max_fd);
467 tr_debug("trps_get_listener: Error opening port %d.");
469 /* opening port succeeded */
470 tr_debug("trps_get_listener: Opened port %d.", port);
472 /* make the sockets non-blocking */
473 for (ii=0; ii<n_fd; ii++) {
474 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
475 tr_debug("trps_get_listener: Error setting O_NONBLOCK.");
476 for (ii=0; ii<n_fd; ii++) {
487 /* store the caller's request handler & cookie */
488 trps->msg_handler = msg_handler;
489 trps->auth_handler = auth_handler;
490 trps->hostname = talloc_strdup(trps, hostname);
492 trps->cookie = cookie;
498 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
500 /* try to establish a GSS context */
501 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
502 tr_notice("trps_authorize_connection: failed to authorize connection");
503 trp_connection_close(conn);
506 tr_notice("trps_authorize_connection: authorized connection");
510 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
515 /* loop as long as the connection exists */
516 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
517 rc=trps_read_message(trps, conn, &msg);
520 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
524 trp_connection_close(conn);
528 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
532 tr_debug("trps_handle_connection: connection closed.");
535 /* TODO: check realm/comm, now part of the update instead of inforec */
536 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
539 tr_notice("trps_validate_update: null TRP update.");
543 if (trp_upd_get_realm(upd)==NULL) {
544 tr_notice("trps_validate_update: received TRP update without realm.");
548 if (trp_upd_get_comm(upd)==NULL) {
549 tr_notice("trps_validate_update: received TRP update without community.");
553 if (trp_upd_get_inforec(upd)==NULL) {
554 tr_notice("trps_validate_update: received TRP update with no info records.");
558 if (trp_upd_get_peer(upd)==NULL) {
559 tr_notice("trps_validate_update: received TRP update without origin peer information.");
567 /* ensure that the update could be accepted if feasible */
568 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
570 switch(trp_inforec_get_type(rec)) {
571 case TRP_INFOREC_TYPE_ROUTE:
572 if ((trp_inforec_get_trust_router(rec)==NULL)
573 || (trp_inforec_get_next_hop(rec)==NULL)) {
574 tr_debug("trps_validate_inforec: missing record info.");
578 /* check for valid metric */
579 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
580 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
584 /* check for valid interval */
585 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
586 tr_debug("trps_validate_inforec: invalid interval.");
591 case TRP_INFOREC_TYPE_COMMUNITY:
592 /* TODO: validate community updates */
596 tr_notice("trps_validate_inforec: unsupported record type.");
597 return TRP_UNSUPPORTED;
603 /* link cost to a peer */
604 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
609 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
611 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
613 return TRP_METRIC_INFINITY;
614 return trp_route_get_metric(entry) + trps_cost(trps, peer);
617 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
619 unsigned int rec_metric=trp_inforec_get_metric(rec);
620 unsigned int new_metric=0;
621 unsigned int current_metric=0;
622 TR_NAME *next_hop=NULL;
624 /* we check these in the validation stage, but just in case... */
625 if (trp_metric_is_invalid(rec_metric))
628 /* retractions (aka infinite metrics) are always feasible */
629 if (trp_metric_is_infinite(rec_metric))
632 /* updates from our current next hop are always feasible*/
633 next_hop=trps_get_next_hop(trps, comm, realm);
635 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
640 /* compare the existing metric we advertise to what we would advertise
641 * if we accept this update */
642 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
643 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
644 if (new_metric <= current_metric)
650 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
651 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
653 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
654 if (0!=clock_gettime(TRP_CLOCK, ts)) {
655 tr_err("trps_compute_expiry: could not read realtime clock.");
659 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
660 ts->tv_sec += small_factor*interval;
664 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
666 TRP_ROUTE *entry=NULL;
668 entry=trp_rtable_get_entry(trps->rtable,
669 trp_upd_get_comm(upd),
670 trp_upd_get_realm(upd),
671 trp_inforec_get_next_hop(rec));
673 entry=trp_route_new(NULL);
675 tr_err("trps_accept_update: unable to allocate new entry.");
679 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
680 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
681 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
682 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
683 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
684 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
685 if ((trp_route_get_comm(entry)==NULL)
686 ||(trp_route_get_realm(entry)==NULL)
687 ||(trp_route_get_peer(entry)==NULL)
688 ||(trp_route_get_trust_router(entry)==NULL)
689 ||(trp_route_get_next_hop(entry)==NULL)) {
690 /* at least one field could not be allocated */
691 tr_err("trps_accept_update: unable to allocate all fields for entry.");
692 trp_route_free(entry);
695 trp_rtable_add(trps->rtable, entry);
698 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
699 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
700 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
701 * time unset on a new route entry. */
702 tr_debug("trps_accept_update: accepting route update.");
703 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
704 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
706 /* check whether the trust router has changed */
707 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
708 trp_inforec_get_trust_router(rec))) {
709 /* The name changed. Set this route as triggered. */
710 tr_debug("trps_accept_update: trust router for route changed.");
711 trp_route_set_triggered(entry, 1);
712 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
714 if (!trps_route_retracted(trps, entry)) {
715 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
716 trp_route_set_expiry(entry, trps_compute_expiry(trps,
717 trp_route_get_interval(entry),
718 trp_route_get_expiry(entry)));
724 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
726 TRP_ROUTE *route=NULL;
729 /* determine feasibility */
730 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
731 tr_debug("trps_handle_update: record feasibility=%d", feas);
733 /* do we have an existing route? */
734 route=trps_get_route(trps,
735 trp_upd_get_comm(upd),
736 trp_upd_get_realm(upd),
737 trp_upd_get_peer(upd));
739 /* there was a route table entry already */
740 tr_debug("trps_handle_updates: route entry already exists.");
742 /* Update is feasible. Accept it. */
743 trps_accept_update(trps, upd, rec);
745 /* Update is infeasible. Ignore it unless the trust router has changed. */
746 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
747 trp_inforec_get_trust_router(rec))) {
748 /* the trust router associated with the route has changed, treat update as a retraction */
749 trps_retract_route(trps, route);
753 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
754 tr_debug("trps_handle_update: no route entry exists yet.");
755 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
756 trps_accept_update(trps, upd, rec);
762 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
765 TR_NAME *this_name=NULL;
769 return 0; /* no provenance list, so it has no names in it */
771 /* now check to see if name is in the provenance */
772 for (ii=0; ii<json_array_size(prov); ii++) {
773 s=json_string_value(json_array_get(prov, ii));
775 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
779 this_name=tr_new_name(s);
780 if (this_name==NULL) {
781 tr_debug("trps_name_in_provenance: unable to allocate name.");
784 if (0==tr_name_cmp(name, this_name)) {
785 tr_free_name(this_name);
788 tr_free_name(this_name);
793 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
795 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
796 TR_COMM *comm=tr_comm_new(tmp_ctx);
799 tr_debug("trps_create_new_comm: unable to allocate new community.");
802 /* fill in the community with info */
803 tr_comm_set_id(comm, tr_dup_name(comm_id));
804 if (tr_comm_get_id(comm)==NULL) {
805 tr_debug("trps_create_new_comm: unable to allocate community name.");
809 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
810 if (trp_inforec_get_apcs(rec)!=NULL) {
811 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
812 if (tr_comm_get_apcs(comm)==NULL) {
813 tr_debug("trps_create_new_comm: unable to allocate APC list.");
818 if (trp_inforec_get_owner_realm(rec)!=NULL) {
819 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
820 if (tr_comm_get_owner_realm(comm)==NULL) {
821 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
826 if (trp_inforec_get_owner_contact(rec)!=NULL) {
827 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
828 if (tr_comm_get_owner_contact(comm)==NULL) {
829 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
834 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
835 talloc_steal(mem_ctx, comm);
838 talloc_free(tmp_ctx);
842 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
844 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
845 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
848 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
851 /* fill in the realm */
852 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
853 if (tr_rp_realm_get_id(rp)==NULL) {
854 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
858 talloc_steal(mem_ctx, rp);
861 talloc_free(tmp_ctx);
865 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
867 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
868 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
871 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
874 /* fill in the realm */
875 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
876 if (tr_idp_realm_get_id(idp)==NULL) {
877 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
881 if (trp_inforec_get_apcs(rec)!=NULL) {
882 tr_idp_realm_set_apcs(idp, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
883 if (tr_idp_realm_get_apcs(idp)==NULL) {
884 tr_debug("trps_create_new_idp_realm: unable to allocate APC list.");
889 idp->origin=TR_REALM_DISCOVERED;
891 talloc_steal(mem_ctx, idp);
894 talloc_free(tmp_ctx);
898 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
900 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
901 TR_NAME *comm_id=trp_upd_get_comm(upd);
902 TR_NAME *realm_id=trp_upd_get_realm(upd);
903 TR_NAME *origin_id=NULL;
904 TR_NAME *our_peer_label=NULL;
906 TR_RP_REALM *rp_realm=NULL;
907 TR_IDP_REALM *idp_realm=NULL;
908 struct timespec expiry={0,0};
911 if ((comm_id==NULL) || (realm_id==NULL))
914 origin_id=trp_inforec_dup_origin(rec);
918 /* see whether we want to add this */
919 our_peer_label=trps_dup_label(trps);
920 if (our_peer_label==NULL) {
921 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
925 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
926 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
928 /* no loop occurring, accept the update */
929 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
931 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
932 comm_id->len, comm_id->buf);
933 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
935 tr_debug("trps_handle_inforec_comm: unable to create new community.");
938 tr_comm_table_add_comm(trps->ctable, comm);
940 /* TODO: see if other comm data match the new inforec and update or complain */
942 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
943 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
946 switch (trp_inforec_get_role(rec)) {
948 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
949 if (rp_realm==NULL) {
950 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
951 realm_id->len, realm_id->buf);
952 rp_realm=trps_create_new_rp_realm(tmp_ctx, realm_id, rec);
953 if (rp_realm==NULL) {
954 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
955 /* we may leave an unused community in the table, but it will only last until
956 * the next table sweep if it does not get any realms before that happens */
959 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
961 /* TODO: if realm existed, see if data match the new inforec and update or complain */
962 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
963 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
964 realm_id->len, realm_id->buf,
965 comm_id->len, comm_id->buf,
966 origin_id->len, origin_id->buf);
969 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
970 if (idp_realm==NULL) {
971 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
972 realm_id->len, realm_id->buf);
973 idp_realm=trps_create_new_idp_realm(tmp_ctx, realm_id, rec);
974 if (idp_realm==NULL) {
975 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
976 /* we may leave an unused community in the table, but it will only last until
977 * the next table sweep if it does not get any realms before that happens */
980 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
982 /* TODO: if realm existed, see if data match the new inforec and update or complain */
983 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
984 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
985 realm_id->len, realm_id->buf,
986 comm_id->len, comm_id->buf,
987 origin_id->len, origin_id->buf);
990 tr_debug("trps_handle_inforec_comm: unable to add realm.");
998 if (our_peer_label!=NULL)
999 tr_free_name(our_peer_label);
1000 if (origin_id!=NULL)
1001 tr_free_name(origin_id);
1002 talloc_free(tmp_ctx);
1007 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
1009 * @param trps Active TRPS instance
1010 * @param peer_name Name of peer that sent this inforec
1011 * @param rec Inforec to filter
1012 * @param realm Name of realm
1013 * @param comm Name of community
1014 * @return 1 if accepted by the filter, 0 otherwise
1016 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TR_NAME *peer_name, TRP_INFOREC *rec, TR_NAME *realm, TR_NAME *comm)
1018 TRP_PEER *peer=NULL;
1019 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1020 TR_FILTER_TARGET *target=NULL;
1023 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
1024 peer=trps_get_peer_by_gssname(trps, peer_name);
1026 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
1032 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
1033 target=tr_filter_target_trp_inforec(NULL, rec, realm, comm);
1035 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1036 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
1039 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
1040 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
1043 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1044 /* either the filter did not match or it matched a reject rule or allocating the target failed */
1049 tr_filter_target_free(target);
1051 /* filter matched an accept rule */
1056 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
1058 TRP_INFOREC *rec=NULL;
1060 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
1061 tr_notice("trps_handle_update: received invalid TRP update.");
1065 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1066 /* validate/sanity check the record update */
1067 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
1068 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
1073 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1074 if (!trps_filter_inbound_inforec(trps,
1075 trp_upd_get_peer(upd),
1077 trp_upd_get_realm(upd),
1078 trp_upd_get_comm(upd))) {
1079 tr_debug("trps_handle_update: inforec rejected by filter.");
1080 continue; /* just go on to the next record */
1083 switch (trp_inforec_get_type(rec)) {
1084 case TRP_INFOREC_TYPE_ROUTE:
1085 tr_debug("trps_handle_update: handling route inforec.");
1086 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1087 tr_notice("trps_handle_update: error handling route inforec.");
1089 case TRP_INFOREC_TYPE_COMMUNITY:
1090 tr_debug("trps_handle_update: handling community inforec.");
1091 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1092 tr_notice("trps_handle_update: error handling community inforec.");
1096 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1103 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1106 tr_notice("trps_validate_request: null TRP request.");
1110 if (trp_req_get_comm(req)==NULL) {
1111 tr_notice("trps_validate_request: received TRP request with null community.");
1115 if (trp_req_get_realm(req)==NULL) {
1116 tr_notice("trps_validate_request: received TRP request with null realm.");
1120 if (trp_req_get_peer(req)==NULL) {
1121 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1128 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1129 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1132 TR_NAME *exclude_peer)
1134 TRP_ROUTE **entry=NULL;
1135 TRP_ROUTE *best=NULL;
1138 unsigned int kk_min=0;
1139 unsigned int min_metric=TRP_METRIC_INFINITY;
1141 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1142 for (kk=0; kk<n_entry; kk++) {
1143 if (trp_route_get_metric(entry[kk]) < min_metric) {
1144 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1147 min_metric=trp_route_get_metric(entry[kk]);
1151 if (trp_metric_is_finite(min_metric))
1158 /* TODO: think this through more carefully. At least ought to add hysteresis
1159 * to avoid flapping between routers or routes. */
1160 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1162 size_t n_comm=0, ii=0;
1163 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1164 size_t n_realm=0, jj=0;
1165 TR_NAME **realm=NULL;
1166 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1167 unsigned int best_metric=0, cur_metric=0;
1169 for (ii=0; ii<n_comm; ii++) {
1170 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1171 for (jj=0; jj<n_realm; jj++) {
1172 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1173 if (best_route==NULL)
1174 best_metric=TRP_METRIC_INFINITY;
1176 best_metric=trp_route_get_metric(best_route);
1178 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1179 if (cur_route!=NULL) {
1180 cur_metric=trp_route_get_metric(cur_route);
1181 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1182 /* The new route has a lower metric than the previous, and is finite. Accept. */
1183 trp_route_set_selected(cur_route, 0);
1184 trp_route_set_selected(best_route, 1);
1185 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1186 trp_route_set_selected(cur_route, 0);
1187 } else if (trp_metric_is_finite(best_metric)) {
1188 trp_route_set_selected(best_route, 1);
1193 realm=NULL; n_realm=0;
1197 comm=NULL; n_comm=0;
1202 /* true if curtime >= expiry */
1203 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1205 return (tr_cmp_timespec(curtime, expiry) >= 0);
1208 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1209 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1210 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1212 struct timespec sweep_time={0,0};
1213 TRP_ROUTE **entry=NULL;
1217 /* use a single time for the entire sweep */
1218 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1219 tr_err("trps_sweep_routes: could not read realtime clock.");
1220 sweep_time.tv_sec=0;
1221 sweep_time.tv_nsec=0;
1225 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
1227 /* loop over the entries */
1228 for (ii=0; ii<n_entry; ii++) {
1229 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1230 tr_debug("trps_sweep_routes: route expired.");
1231 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1233 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1234 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1237 /* set metric to infinity and reset timer */
1238 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1239 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1240 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1241 trp_route_get_interval(entry[ii]),
1242 trp_route_get_expiry(entry[ii])));
1252 static char *timespec_to_str(struct timespec *ts)
1257 if (localtime_r(&(ts->tv_sec), &tm)==NULL)
1260 s=malloc(40); /* long enough to contain strftime result */
1264 if (strftime(s, 40, "%F %T", &tm)==0) {
1272 /* Sweep for expired communities/realms/memberships. */
1273 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1275 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1276 struct timespec sweep_time={0,0};
1277 TR_COMM_MEMB *memb=NULL;
1278 TR_COMM_ITER *iter=NULL;
1279 TRP_RC rc=TRP_ERROR;
1281 /* use a single time for the entire sweep */
1282 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1283 tr_err("trps_sweep_ctable: could not read realtime clock.");
1284 sweep_time.tv_sec=0;
1285 sweep_time.tv_nsec=0;
1289 /* iterate all memberships */
1290 iter=tr_comm_iter_new(tmp_ctx);
1292 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1296 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1298 memb=tr_comm_memb_iter_all_next(iter)) {
1299 if (tr_comm_memb_get_origin(memb)==NULL)
1300 continue; /* do not expire local entries */
1302 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1303 if (tr_comm_memb_get_times_expired(memb)>0) {
1304 /* Already expired once; flush. */
1305 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1306 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1307 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1308 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1309 timespec_to_str(tr_comm_memb_get_expiry(memb)));
1310 tr_comm_table_remove_memb(trps->ctable, memb);
1311 tr_comm_memb_free(memb);
1313 /* This is the first expiration. Note this and reset the expiry time. */
1314 tr_comm_memb_expire(memb);
1315 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1316 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1317 timespec_to_str(&sweep_time),
1318 timespec_to_str(tr_comm_memb_get_expiry(memb)),
1319 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1320 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1321 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1326 /* get rid of any unreferenced realms, etc */
1327 tr_comm_table_sweep(trps->ctable);
1330 talloc_free(tmp_ctx);
1335 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1337 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1338 return TRP_METRIC_INVALID;
1340 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1341 return TRP_METRIC_INFINITY;
1343 if (trp_metric_is_finite(m1+m2))
1346 return TRP_METRIC_INFINITY;
1349 /* convert an rentry into a new trp update info record */
1350 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1352 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1353 unsigned int linkcost=0;
1356 if (trp_route_is_local(route))
1359 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1360 trp_route_get_peer(route)));
1363 /* Note that we leave the next hop empty since the recipient fills that in.
1364 * This is where we add the link cost (currently always 1) to the next peer. */
1365 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1366 ||(trp_inforec_set_metric(rec,
1367 trps_metric_add(trp_route_get_metric(route),
1368 linkcost)) != TRP_SUCCESS)
1369 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1370 tr_err("trps_route_to_inforec: error creating route update.");
1378 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1380 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1381 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1382 TRP_INFOREC *rec=NULL;
1385 tr_err("trps_route_to_upd: could not create update message.");
1388 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1389 if (trp_upd_get_realm(upd)==NULL) {
1390 tr_err("trps_route_to_upd: could not copy realm.");
1391 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1394 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1395 if (trp_upd_get_comm(upd)==NULL) {
1396 tr_err("trps_route_to_upd: could not copy comm.");
1397 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1400 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1402 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1403 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1404 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1405 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1408 trp_upd_add_inforec(upd, rec);
1411 talloc_steal(mem_ctx, upd);
1414 talloc_free(tmp_ctx);
1418 /* select the correct route to comm/realm to be announced to peer */
1419 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1423 /* Take the currently selected route unless it is through the peer we're sending the update to.
1424 * I.e., enforce the split horizon rule. */
1425 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1427 /* No selected route, this should only happen if the only route has been retracted,
1428 * in which case we do not want to advertise it. */
1431 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1432 trp_route_get_peer(route)->buf);
1433 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1434 tr_debug("trps_select_realm_update: matched, finding alternate route");
1435 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1436 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1437 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1438 return NULL; /* don't advertise a nonexistent or retracted route */
1443 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1444 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1446 TRPS_INSTANCE *trps,
1447 TR_NAME *peer_gssname,
1451 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1452 TR_NAME **realm=NULL;
1455 TRP_ROUTE *best=NULL;
1461 for (ii=0; ii<n_comm; ii++) {
1462 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1463 for (jj=0; jj<n_realm; jj++) {
1464 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1465 /* If we found a route, add it to the list. If triggered!=0, then only
1466 * add triggered routes. */
1467 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1468 upd=trps_route_to_upd(mem_ctx, trps, best);
1470 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1473 g_ptr_array_add(updates, upd);
1489 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1491 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1492 TRP_INFOREC *rec=NULL;
1498 comm=tr_comm_memb_get_comm(memb);
1499 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1503 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1508 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1513 if ((NULL!=tr_comm_get_apcs(comm)) &&
1514 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1515 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1516 (NULL==trp_inforec_get_apcs(rec)))) {
1521 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1522 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1523 (NULL==trp_inforec_get_owner_realm(rec)))) {
1528 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1529 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1530 (NULL==trp_inforec_get_owner_contact(rec)))) {
1535 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1536 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1541 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1547 talloc_steal(mem_ctx, rec);
1550 talloc_free(tmp_ctx);
1554 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1555 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1557 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1558 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1559 TRP_INFOREC *rec=NULL;
1560 TR_COMM_ITER *iter=NULL;
1561 TR_COMM_MEMB *memb=NULL;
1566 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1567 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1568 /* leave peer empty */
1570 iter=tr_comm_iter_new(tmp_ctx);
1572 tr_err("trps_comm_update: unable to allocate iterator.");
1577 /* now add inforecs */
1578 switch (realm->role) {
1580 memb=tr_comm_table_find_idp_memb(trps->ctable,
1581 tr_realm_get_id(realm),
1582 tr_comm_get_id(comm));
1585 memb=tr_comm_table_find_rp_memb(trps->ctable,
1586 tr_realm_get_id(realm),
1587 tr_comm_get_id(comm));
1593 for (memb=tr_comm_memb_iter_first(iter, memb);
1595 memb=tr_comm_memb_iter_next(iter)) {
1596 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1598 tr_err("trps_comm_update: unable to allocate inforec.");
1602 trp_upd_add_inforec(upd, rec);
1606 if (trp_upd_get_inforec(upd)==NULL)
1607 upd=NULL; /* no inforecs, no reason to send the update */
1609 talloc_steal(mem_ctx, upd); /* success! */
1612 talloc_free(tmp_ctx);
1616 /* Find all community updates to send to a peer and add these as TR_UPD records
1617 * to the updates GPtrArray. */
1618 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1620 TRPS_INSTANCE *trps,
1621 TR_NAME *peer_gssname,
1624 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1625 TR_COMM_ITER *comm_iter=NULL;
1627 TR_COMM_ITER *realm_iter=NULL;
1628 TR_REALM *realm=NULL;
1630 TRP_RC rc=TRP_ERROR;
1632 /* currently do not send any communities on triggered updates */
1638 comm_iter=tr_comm_iter_new(tmp_ctx);
1639 realm_iter=tr_comm_iter_new(tmp_ctx);
1640 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1641 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1646 /* do every community */
1647 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1649 comm=tr_comm_table_iter_next(comm_iter)) {
1650 /* do every realm in this community */
1651 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1652 tr_comm_get_id(comm)->len,
1653 tr_comm_get_id(comm)->buf);
1654 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1656 realm=tr_realm_iter_next(realm_iter)) {
1657 /* get the update for this comm/realm */
1658 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1659 tr_realm_get_id(realm)->len,
1660 tr_realm_get_id(realm)->buf);
1661 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1663 g_ptr_array_add(updates, upd);
1668 talloc_free(tmp_ctx);
1673 * Filter the inforecs in a single update
1675 * @param filt The filter to apply
1676 * @param upd The update to filter
1678 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1680 TRP_INFOREC *this=NULL, *next=NULL;
1681 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1682 TR_FILTER_TARGET *target=NULL;
1684 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1686 target=tr_filter_target_trp_inforec(NULL, this, trp_upd_get_realm(upd), trp_upd_get_comm(upd));
1688 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1689 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1692 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1693 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1694 /* Either no filter matched or one matched and rejected this record.
1695 * Also filter out record if we were unable to allocate a target. */
1696 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1699 tr_filter_target_free(target);
1704 * May shuffle the update list.
1706 * @param filters The filter set for the relevant TRP peer
1707 * @param updates GPtrArray of updates to filter
1709 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1714 /* walk backward through the array so we can remove elements */
1715 for (ii=updates->len-1; ii>=0; ii--) {
1716 upd=g_ptr_array_index(updates, ii);
1717 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1718 /* see if we removed all the records from this update */
1719 if (trp_upd_num_inforecs(upd)==0)
1720 g_ptr_array_remove_index_fast(updates, ii); /* does not preserve order at index ii or higher */
1724 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1725 static void trps_trp_upd_destroy(gpointer data)
1727 trp_upd_free((TRP_UPD *)data);
1730 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1731 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1733 TRP_UPDATE_TYPE update_type,
1737 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1738 TR_MSG msg; /* not a pointer! */
1740 TRP_ROUTE *route=NULL;
1743 TRP_RC rc=TRP_ERROR;
1744 TR_NAME *peer_label=trp_peer_get_label(peer);
1745 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1747 if (updates==NULL) {
1748 tr_err("trps_update_one_peer: unable to allocate updates array.");
1753 switch (update_type) {
1754 case TRP_UPDATE_TRIGGERED:
1755 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1756 peer_label->len, peer_label->buf);
1758 case TRP_UPDATE_SCHEDULED:
1759 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1760 peer_label->len, peer_label->buf);
1762 case TRP_UPDATE_REQUESTED:
1763 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1764 peer_label->len, peer_label->buf);
1767 tr_err("trps_update_one_peer: invalid update type requested.");
1772 /* First, gather route updates. */
1773 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1774 if ((comm==NULL) && (realm==NULL)) {
1776 rc=trps_select_route_updates_for_peer(tmp_ctx,
1780 update_type==TRP_UPDATE_TRIGGERED);
1781 } else if ((comm!=NULL) && (realm!=NULL)) {
1782 /* a single community/realm was requested */
1783 route=trps_select_realm_update(trps, comm, realm, peer_label);
1785 /* we have no actual update to send back, MUST send a retraction */
1786 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1787 route=trp_route_new(tmp_ctx);
1788 trp_route_set_comm(route, tr_dup_name(comm));
1789 trp_route_set_realm(route, tr_dup_name(realm));
1790 trp_route_set_peer(route, tr_new_name(""));
1791 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1792 trp_route_set_trust_router(route, tr_new_name(""));
1793 trp_route_set_next_hop(route, tr_new_name(""));
1795 upd=trps_route_to_upd(tmp_ctx, trps, route);
1797 tr_err("trps_update_one_peer: unable to allocate route update.");
1801 g_ptr_array_add(updates, upd);
1803 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1808 /* Second, gather community updates */
1809 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1810 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1812 /* see if we have anything to send */
1813 if (updates->len<=0)
1814 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1816 /* Apply outbound TRP filters for this peer */
1817 trps_filter_outbound_updates(peer->filters, updates);
1819 if (updates->len<=0)
1820 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1822 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1823 for (ii=0; ii<updates->len; ii++) {
1824 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1825 /* now encode the update message */
1826 tr_msg_set_trp_upd(&msg, upd);
1827 encoded = tr_msg_encode(&msg);
1828 if (encoded == NULL) {
1829 tr_err("trps_update_one_peer: error encoding update.");
1834 tr_debug("trps_update_one_peer: adding message to queue.");
1835 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1836 tr_err("trps_update_one_peer: error queueing update.");
1838 tr_debug("trps_update_one_peer: update queued successfully.");
1840 tr_msg_free_encoded(encoded);
1850 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1851 talloc_free(tmp_ctx);
1855 /* all routes/communities to all peers */
1856 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1858 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1859 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1860 TRP_PEER *peer=NULL;
1861 TRP_RC rc=TRP_SUCCESS;
1863 if (trps->ptable==NULL)
1864 return TRP_SUCCESS; /* no peers, nothing to do */
1867 tr_err("trps_update: failed to allocate peer table iterator.");
1868 talloc_free(tmp_ctx);
1872 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1873 (peer!=NULL) && (rc==TRP_SUCCESS);
1874 peer=trp_ptable_iter_next(iter))
1876 if (!trps_peer_connected(trps, peer)) {
1877 TR_NAME *peer_label=trp_peer_get_label(peer);
1878 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1879 peer_label->len, peer_label->buf);
1882 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1885 tr_debug("trps_update: rc=%u after attempting update.", rc);
1886 trp_ptable_iter_free(iter);
1887 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1888 talloc_free(tmp_ctx);
1892 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1894 trp_rtable_add(trps->rtable, route); /* should return status */
1898 /* steals the peer object */
1899 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1901 if (trps->ptable==NULL) {
1902 trps->ptable=trp_ptable_new(trps);
1903 if (trps->ptable==NULL)
1906 return trp_ptable_add(trps->ptable, peer);
1909 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1911 if (trps->ptable==NULL)
1914 return trp_ptable_find_gss_name(trps->ptable, gssname);
1917 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1919 if (trps->ptable==NULL)
1922 return trp_ptable_find_servicename(trps->ptable, servicename);
1925 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1927 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1931 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1938 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1941 TR_NAME *realm=NULL;
1943 tr_debug("trps_handle_request: handling TRP request.");
1945 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1946 tr_notice("trps_handle_request: received invalid TRP request.");
1950 if (!trp_req_is_wildcard(req)) {
1951 comm=trp_req_get_comm(req);
1952 realm=trp_req_get_realm(req);
1953 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1954 comm->len, comm->buf, realm->len, realm->buf);
1956 tr_debug("trps_handle_request: all routes requested.");
1957 /* leave comm/realm NULL */
1959 return trps_update_one_peer(trps,
1960 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1961 TRP_UPDATE_REQUESTED,
1967 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1969 TRP_RC rc=TRP_ERROR;
1971 switch (tr_msg_get_msg_type(tr_msg)) {
1973 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1974 if (rc==TRP_SUCCESS) {
1975 rc=trps_update_active_routes(trps);
1976 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1981 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1985 /* unknown error or one we don't care about (e.g., TID messages) */
1990 /* send wildcard route request to a peer */
1991 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1993 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1994 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1995 TR_MSG msg; /* not a pointer */
1996 TRP_REQ *req=trp_req_new(tmp_ctx);
1998 TRP_RC rc=TRP_ERROR;
2001 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
2005 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
2006 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
2011 tr_msg_set_trp_req(&msg, req);
2012 encoded=tr_msg_encode(&msg);
2013 if (encoded==NULL) {
2014 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
2019 tr_debug("trps_wildcard_route_req: adding message to queue.");
2020 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
2021 tr_err("trps_wildcard_route_req: error queueing request.");
2024 tr_debug("trps_wildcard_route_req: request queued successfully.");
2030 tr_msg_free_encoded(encoded);
2034 talloc_free(tmp_ctx);