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
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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
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42 #include <poll.h> // for nfds_t
48 #include <tr_name_internal.h>
49 #include <trp_route.h>
50 #include <trp_internal.h>
51 #include <tr_gss_names.h>
53 #include <trp_ptable.h>
54 #include <trp_rtable.h>
57 #include <tr_socket.h>
59 static int trps_destructor(void *object)
61 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
62 if (trps->rtable!=NULL)
63 trp_rtable_free(trps->rtable);
67 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
69 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
76 trps->update_interval=(struct timeval){0,0};
77 trps->sweep_interval=(struct timeval){0,0};
80 trps->mq=tr_mq_new(trps);
82 /* failed to allocate mq */
88 if (trps_init_rtable(trps) != TRP_SUCCESS) {
89 /* failed to allocate rtable */
94 talloc_set_destructor((void *)trps, trps_destructor);
99 /* create a new route table, first discarding an old one if necessary */
100 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
102 if (trps->rtable != NULL) {
103 trp_rtable_free(trps->rtable);
107 trps->rtable=trp_rtable_new();
108 if (trps->rtable==NULL) {
114 void trps_clear_rtable(TRPS_INSTANCE *trps)
116 trp_rtable_clear(trps->rtable);
119 void trps_free (TRPS_INSTANCE *trps)
125 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
127 return tr_mq_pop(trps->mq, 0);
130 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
132 tr_mq_add(trps->mq, msg);
135 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
137 return trps->connect_interval.tv_sec;
140 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
142 trps->connect_interval.tv_sec=interval;
143 trps->connect_interval.tv_usec=0;
146 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
148 return trps->update_interval.tv_sec;
151 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
153 trps->update_interval.tv_sec=interval;
154 trps->update_interval.tv_usec=0;
157 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
159 return trps->sweep_interval.tv_sec;
162 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
164 trps->sweep_interval.tv_sec=interval;
165 trps->sweep_interval.tv_usec=0;
168 void trps_set_ctable(TRPS_INSTANCE *trps, TR_COMM_TABLE *comm)
173 void trps_set_ptable(TRPS_INSTANCE *trps, TRP_PTABLE *ptable)
175 if (trps->ptable!=NULL)
176 trp_ptable_free(trps->ptable);
180 void trps_set_peer_status_callback(TRPS_INSTANCE *trps, void (*cb)(TRP_PEER *, void *), void *cookie)
182 TRP_PTABLE_ITER *iter=NULL;
184 if (trps->ptable==NULL)
187 iter=trp_ptable_iter_new(NULL);
188 for (peer=trp_ptable_iter_first(iter, trps->ptable); peer!=NULL; peer=trp_ptable_iter_next(iter))
189 trp_peer_set_conn_status_cb(peer, cb, cookie);
190 trp_ptable_iter_free(iter);
193 /* Get the label peers will know us by - needs to match trp_peer_get_label() output.
194 * There is no get, only dup, because we don't store the label except when requested. */
195 TR_NAME *trps_dup_label(TRPS_INSTANCE *trps)
197 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
199 char *s=talloc_asprintf(tmp_ctx, "%s:%u", trps->hostname, trps->trps_port);
202 label=tr_new_name(s);
205 talloc_free(tmp_ctx);
209 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
211 TRPC_INSTANCE *cur=NULL;
213 TR_NAME *peer_servicename=trp_peer_get_servicename(peer);
215 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
216 name=trpc_get_gssname(cur);
217 if ((name!=NULL) && (0==tr_name_cmp(peer_servicename, name))) {
224 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
226 if (trps->conn==NULL)
229 trp_connection_append(trps->conn, new);
231 talloc_steal(trps, new);
234 /* ok to call more than once; guarantees connection no longer in the list.
235 * Caller is responsible for freeing the removed element afterwards. */
236 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
238 trps->conn=trp_connection_remove(trps->conn, remove);
241 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
243 if (trps->trpc==NULL)
246 trpc_append(trps->trpc, trpc);
248 talloc_steal(trps, trpc);
251 /* ok to call more than once; guarantees trpc no longer in the list.
252 * Caller is responsible for freeing the removed element afterwards. */
253 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
255 trps->trpc=trpc_remove(trps->trpc, remove);
258 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
260 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
261 TR_MQ_MSG *mq_msg=NULL;
264 TRPC_INSTANCE *trpc=NULL;
266 /* get the connection for this peer */
267 trpc=trps_find_trpc(trps, peer);
268 /* The peer connection (trpc) usually exists even if the connection is down.
269 * We will queue messages even if the connection is down. To prevent this from
270 * endlessly increasing the size of the queue, the trpc handler needs to clear
271 * its queue periodically, even if it is unable to send the messages
274 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
276 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND);
277 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
278 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
279 trpc_mq_add(trpc, mq_msg);
282 talloc_free(tmp_ctx);
286 /* get the currently selected route if available */
287 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
289 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
292 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
294 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
295 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
298 /* copy the result if you want to keep it */
299 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
301 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
305 return trp_route_get_next_hop(route);
309 /* mark a route as retracted */
310 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
312 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
313 trp_route_set_triggered(entry, 1);
316 /* is this route retracted? */
317 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
319 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
322 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
327 TRP_PEER *peer=NULL; /* entry in the peer table */
328 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
330 tr_debug("trps_read_message: started");
331 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
332 *(trp_connection_get_gssctx(conn)),
335 tr_debug("trps_read_message: error");
341 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
342 tr_debug("trps_read_message: %.*s", buflen, buf);
344 *msg= tr_msg_decode(NULL, buf, buflen);
349 conn_peer=trp_connection_get_peer(conn);
350 if (conn_peer==NULL) {
351 tr_err("trps_read_message: connection has no peer name");
355 peer=trps_get_peer_by_gssname(trps, conn_peer);
357 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
361 /* verify we received a message we support, otherwise drop it now */
362 switch (tr_msg_get_msg_type(*msg)) {
364 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
365 /* update provenance if necessary */
366 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
370 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
374 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
375 tr_msg_free_decoded(*msg);
377 return TRP_UNSUPPORTED;
383 int trps_get_listener(TRPS_INSTANCE *trps,
384 TRPS_MSG_FUNC msg_handler,
385 TRP_AUTH_FUNC auth_handler,
386 const char *hostname,
395 n_fd = tr_sock_listen_all(port, fd_out, max_fd);
398 tr_err("trps_get_listener: Error opening port %d.", port);
400 /* opening port succeeded */
401 tr_info("trps_get_listener: Opened port %d.", port);
403 /* make the sockets non-blocking */
404 for (ii=0; ii<n_fd; ii++) {
405 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
406 tr_err("trps_get_listener: Error setting O_NONBLOCK.");
407 for (ii=0; ii<n_fd; ii++) {
418 /* store the caller's request handler & cookie */
419 trps->msg_handler = msg_handler;
420 trps->auth_handler = auth_handler;
421 trps->hostname = talloc_strdup(trps, hostname);
422 trps->trps_port = port;
423 trps->cookie = cookie;
429 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
431 /* try to establish a GSS context */
432 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
433 tr_debug("trps_authorize_connection: failed to authorize connection");
434 trp_connection_close(conn);
437 tr_debug("trps_authorize_connection: authorized connection");
441 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
446 /* loop as long as the connection exists */
447 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
448 rc=trps_read_message(trps, conn, &msg);
451 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
455 trp_connection_close(conn);
459 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
463 tr_debug("trps_handle_connection: connection closed.");
466 /* TODO: check realm/comm, now part of the update instead of inforec */
467 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
470 tr_notice("trps_validate_update: null TRP update.");
474 if (trp_upd_get_realm(upd)==NULL) {
475 tr_notice("trps_validate_update: received TRP update without realm.");
479 if (trp_upd_get_comm(upd)==NULL) {
480 tr_notice("trps_validate_update: received TRP update without community.");
484 if (trp_upd_get_inforec(upd)==NULL) {
485 tr_notice("trps_validate_update: received TRP update with no info records.");
489 if (trp_upd_get_peer(upd)==NULL) {
490 tr_notice("trps_validate_update: received TRP update without origin peer information.");
498 /* ensure that the update could be accepted if feasible */
499 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
501 switch(trp_inforec_get_type(rec)) {
502 case TRP_INFOREC_TYPE_ROUTE:
503 if ((trp_inforec_get_trust_router(rec)==NULL)
504 || (trp_inforec_get_next_hop(rec)==NULL)) {
505 tr_debug("trps_validate_inforec: missing record info.");
509 /* check for valid ports */
510 if ((trp_inforec_get_trust_router_port(rec) <= 0)
511 || (trp_inforec_get_trust_router_port(rec) > 65535)) {
512 tr_debug("trps_validate_inforec: invalid trust router port (%d)",
513 trp_inforec_get_trust_router_port(rec));
517 if ((trp_inforec_get_next_hop_port(rec) <= 0)
518 || (trp_inforec_get_next_hop_port(rec) > 65535)) {
519 tr_debug("trps_validate_inforec: invalid next hop port (%d)",
520 trp_inforec_get_next_hop_port(rec));
524 /* check for valid metric */
525 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
526 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
530 /* check for valid interval */
531 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
532 tr_debug("trps_validate_inforec: invalid interval.");
537 case TRP_INFOREC_TYPE_COMMUNITY:
538 /* TODO: validate community updates */
542 tr_notice("trps_validate_inforec: unsupported record type.");
543 return TRP_UNSUPPORTED;
549 /* link cost to a peer */
550 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
555 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
557 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
559 return TRP_METRIC_INFINITY;
560 return trp_route_get_metric(entry) + trps_cost(trps, peer);
563 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
565 unsigned int rec_metric=trp_inforec_get_metric(rec);
566 unsigned int new_metric=0;
567 unsigned int current_metric=0;
568 TR_NAME *next_hop=NULL;
570 /* we check these in the validation stage, but just in case... */
571 if (trp_metric_is_invalid(rec_metric))
574 /* retractions (aka infinite metrics) are always feasible */
575 if (trp_metric_is_infinite(rec_metric))
578 /* updates from our current next hop are always feasible*/
579 next_hop=trps_get_next_hop(trps, comm, realm);
581 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
586 /* compare the existing metric we advertise to what we would advertise
587 * if we accept this update */
588 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
589 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
590 if (new_metric <= current_metric)
596 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
597 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
599 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
600 if (0!=clock_gettime(TRP_CLOCK, ts)) {
601 tr_err("trps_compute_expiry: could not read realtime clock.");
605 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
606 ts->tv_sec += small_factor*interval;
611 /* compare hostname/port of the trust router, return 0 if they match */
612 static int trust_router_changed(TRP_ROUTE *route, TRP_INFOREC *rec)
614 if (trp_route_get_trust_router_port(route) != trp_inforec_get_trust_router_port(rec))
617 return tr_name_cmp(trp_route_get_trust_router(route),
618 trp_inforec_get_trust_router(rec));
621 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
623 TRP_ROUTE *entry=NULL;
625 entry=trp_rtable_get_entry(trps->rtable,
626 trp_upd_get_comm(upd),
627 trp_upd_get_realm(upd),
628 trp_inforec_get_next_hop(rec));
630 entry=trp_route_new(NULL);
632 tr_err("trps_accept_update: unable to allocate new entry.");
636 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
637 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
638 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
639 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
640 trp_route_set_trust_router_port(entry, trp_inforec_get_trust_router_port(rec));
641 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
642 trp_route_set_next_hop_port(entry, trp_inforec_get_next_hop_port(rec));
643 if ((trp_route_get_comm(entry)==NULL)
644 ||(trp_route_get_realm(entry)==NULL)
645 ||(trp_route_get_peer(entry)==NULL)
646 ||(trp_route_get_trust_router(entry)==NULL)
647 ||(trp_route_get_next_hop(entry)==NULL)) {
648 /* at least one field could not be allocated */
649 tr_err("trps_accept_update: unable to allocate all fields for entry.");
650 trp_route_free(entry);
653 trp_rtable_add(trps->rtable, entry);
656 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
657 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
658 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
659 * time unset on a new route entry. */
660 tr_debug("trps_accept_update: accepting route update.");
661 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
662 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
664 /* check whether the trust router has changed (either name or port) */
665 if (trust_router_changed(entry, rec)) {
666 /* The name changed. Set this route as triggered. */
667 tr_debug("trps_accept_update: trust router for route changed.");
668 trp_route_set_triggered(entry, 1);
669 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
670 trp_route_set_trust_router_port(entry, trp_inforec_get_trust_router_port(rec));
672 if (!trps_route_retracted(trps, entry)) {
673 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
674 trp_route_set_expiry(entry, trps_compute_expiry(trps,
675 trp_route_get_interval(entry),
676 trp_route_get_expiry(entry)));
682 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
684 TRP_ROUTE *route=NULL;
685 TR_COMM *comm = NULL;
688 /* determine feasibility */
689 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
690 tr_debug("trps_handle_update: record feasibility=%d", feas);
692 /* verify that the community is an APC */
693 comm = tr_comm_table_find_comm(trps->ctable, trp_upd_get_comm(upd));
695 /* We don't know this community. Reject the route. */
696 tr_debug("trps_handle_updates: community %.*s unknown, ignoring route for %.*s",
697 trp_upd_get_comm(upd)->len, trp_upd_get_comm(upd)->buf,
698 trp_upd_get_realm(upd)->len, trp_upd_get_realm(upd)->buf);
699 } else if (tr_comm_get_type(comm) != TR_COMM_APC) {
700 /* The community in a route request *must* be an APC. This was not - ignore it. */
701 tr_debug("trps_handle_updates: community %.*s is not an APC, ignoring route for %.*s",
702 trp_upd_get_comm(upd)->len, trp_upd_get_comm(upd)->buf,
703 trp_upd_get_realm(upd)->len, trp_upd_get_realm(upd)->buf);
705 /* do we have an existing route? */
706 route=trps_get_route(trps,
707 trp_upd_get_comm(upd),
708 trp_upd_get_realm(upd),
709 trp_upd_get_peer(upd));
711 /* there was a route table entry already */
712 tr_debug("trps_handle_updates: route entry already exists.");
714 /* Update is feasible. Accept it. */
715 trps_accept_update(trps, upd, rec);
717 /* Update is infeasible. Ignore it unless the trust router has changed. */
718 if (trust_router_changed(route, rec)) {
719 /* the trust router associated with the route has changed, treat update as a retraction */
720 trps_retract_route(trps, route);
724 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
725 tr_debug("trps_handle_update: no route entry exists yet.");
726 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
727 trps_accept_update(trps, upd, rec);
734 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
737 TR_NAME *this_name=NULL;
741 return 0; /* no provenance list, so it has no names in it */
743 /* now check to see if name is in the provenance */
744 for (ii=0; ii<json_array_size(prov); ii++) {
745 s=json_string_value(json_array_get(prov, ii));
747 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
751 this_name=tr_new_name(s);
752 if (this_name==NULL) {
753 tr_debug("trps_name_in_provenance: unable to allocate name.");
756 if (0==tr_name_cmp(name, this_name)) {
757 tr_free_name(this_name);
760 tr_free_name(this_name);
765 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
767 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
768 TR_COMM *comm=tr_comm_new(tmp_ctx);
771 tr_debug("trps_create_new_comm: unable to allocate new community.");
774 /* fill in the community with info */
775 tr_comm_set_id(comm, tr_dup_name(comm_id));
776 if (tr_comm_get_id(comm)==NULL) {
777 tr_debug("trps_create_new_comm: unable to allocate community name.");
781 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
782 if (trp_inforec_get_apcs(rec)!=NULL) {
783 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
784 if (tr_comm_get_apcs(comm)==NULL) {
785 tr_debug("trps_create_new_comm: unable to allocate APC list.");
790 if (trp_inforec_get_owner_realm(rec)!=NULL) {
791 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
792 if (tr_comm_get_owner_realm(comm)==NULL) {
793 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
798 if (trp_inforec_get_owner_contact(rec)!=NULL) {
799 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
800 if (tr_comm_get_owner_contact(comm)==NULL) {
801 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
806 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
807 talloc_steal(mem_ctx, comm);
810 talloc_free(tmp_ctx);
814 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *comm, TR_NAME *realm_id, TRP_INFOREC *rec)
816 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
817 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
820 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
823 /* fill in the realm */
824 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
825 if (tr_rp_realm_get_id(rp)==NULL) {
826 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
830 talloc_steal(mem_ctx, rp);
833 talloc_free(tmp_ctx);
837 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx,
842 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
843 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
844 TR_APC *realm_apcs = NULL;
847 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
850 /* fill in the realm */
851 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
852 if (tr_idp_realm_get_id(idp)==NULL) {
853 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
858 /* Set the APCs. If the community is a CoI, copy its APCs. If it is an APC, then
859 * that community itself is the APC for the realm. */
860 if (trp_inforec_get_comm_type(rec) == TR_COMM_APC) {
861 /* the community is an APC for this realm */
862 realm_apcs = tr_apc_new(tmp_ctx);
863 if (realm_apcs == NULL) {
864 tr_debug("trps_create_new_idp_realm: unable to allocate new APC list.");
869 tr_apc_set_id(realm_apcs, tr_dup_name(comm_id));
870 if (tr_apc_get_id(realm_apcs) == NULL) {
871 tr_debug("trps_create_new_idp_realm: unable to allocate new APC name.");
876 /* the community is not an APC for this realm */
877 realm_apcs = trp_inforec_get_apcs(rec);
878 if (realm_apcs == NULL) {
879 tr_debug("trps_create_new_idp_realm: no APCs for realm %.*s/%.*s, cannot add.",
880 realm_id->len, realm_id->buf,
881 comm_id->len, comm_id->buf);
886 /* we have APCs, make our own copy */
887 realm_apcs = tr_apc_dup(tmp_ctx, realm_apcs);
888 if (realm_apcs == NULL) {
889 tr_debug("trps_create_new_idp_realm: unable to duplicate APC list.");
895 /* Whether the community is an APC or CoI, the APCs for the realm are in realm_apcs */
896 tr_idp_realm_set_apcs(idp, realm_apcs); /* takes realm_apcs out of tmp_ctx on success */
897 if (tr_idp_realm_get_apcs(idp) == NULL) {
898 tr_debug("trps_create_new_idp_realm: unable to set APC list for new realm.");
903 idp->origin=TR_REALM_DISCOVERED;
905 talloc_steal(mem_ctx, idp);
908 talloc_free(tmp_ctx);
912 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
914 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
915 TR_NAME *comm_id=trp_upd_get_comm(upd);
916 TR_NAME *realm_id=trp_upd_get_realm(upd);
917 TR_NAME *origin_id=NULL;
918 TR_NAME *our_peer_label=NULL;
920 TR_RP_REALM *rp_realm=NULL;
921 TR_IDP_REALM *idp_realm=NULL;
922 struct timespec expiry={0,0};
925 if ((comm_id==NULL) || (realm_id==NULL))
928 origin_id=trp_inforec_dup_origin(rec);
932 /* see whether we want to add this */
933 our_peer_label=trps_dup_label(trps);
934 if (our_peer_label==NULL) {
935 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
939 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
940 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
942 /* no loop occurring, accept the update */
943 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
945 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
946 comm_id->len, comm_id->buf);
947 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
949 tr_debug("trps_handle_inforec_comm: unable to create new community.");
952 if (tr_comm_table_add_comm(trps->ctable, comm) != 0)
954 tr_debug("trps_handle_inforec_comm: unable to add community to community table.");
958 /* TODO: see if other comm data match the new inforec and update or complain */
960 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
961 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
964 switch (trp_inforec_get_role(rec)) {
966 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
967 if (rp_realm==NULL) {
968 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
969 realm_id->len, realm_id->buf);
970 rp_realm= trps_create_new_rp_realm(tmp_ctx, tr_comm_get_id(comm), realm_id, rec);
971 if (rp_realm==NULL) {
972 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
973 /* we may leave an unused community in the table, but it will only last until
974 * the next table sweep if it does not get any realms before that happens */
977 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
979 /* TODO: if realm existed, see if data match the new inforec and update or complain */
980 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
981 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
982 realm_id->len, realm_id->buf,
983 comm_id->len, comm_id->buf,
984 origin_id->len, origin_id->buf);
987 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
988 if (idp_realm==NULL) {
989 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
990 realm_id->len, realm_id->buf);
991 idp_realm= trps_create_new_idp_realm(tmp_ctx, tr_comm_get_id(comm), realm_id, rec);
992 if (idp_realm==NULL) {
993 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
994 /* we may leave an unused community in the table, but it will only last until
995 * the next table sweep if it does not get any realms before that happens */
998 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
1000 /* TODO: if realm existed, see if data match the new inforec and update or complain */
1001 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
1002 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
1003 realm_id->len, realm_id->buf,
1004 comm_id->len, comm_id->buf,
1005 origin_id->len, origin_id->buf);
1008 tr_debug("trps_handle_inforec_comm: unable to add realm.");
1016 if (our_peer_label!=NULL)
1017 tr_free_name(our_peer_label);
1018 if (origin_id!=NULL)
1019 tr_free_name(origin_id);
1020 talloc_free(tmp_ctx);
1025 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
1027 * @param trps Active TRPS instance
1028 * @param upd TRP_UPD that contains the inforec to filter
1029 * @param rec Inforec to filter
1030 * @return 1 if accepted by the filter, 0 otherwise
1032 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
1034 TRP_PEER *peer=NULL;
1035 TR_NAME *peer_name=NULL;
1036 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1037 TR_FILTER_TARGET *target=NULL;
1040 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
1041 peer_name=trp_upd_get_peer(upd);
1042 peer=trps_get_peer_by_gssname(trps, peer_name);
1044 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
1050 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
1051 target= tr_filter_target_trp_inforec(NULL, upd, rec);
1053 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1054 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
1057 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
1058 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
1061 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1062 /* either the filter did not match or it matched a reject rule or allocating the target failed */
1067 tr_filter_target_free(target);
1069 /* filter matched an accept rule */
1074 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
1076 TRP_INFOREC *rec=NULL;
1078 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
1079 tr_notice("trps_handle_update: received invalid TRP update.");
1083 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1084 /* validate/sanity check the record update */
1085 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
1086 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
1091 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1092 if (!trps_filter_inbound_inforec(trps, upd, rec)) {
1093 tr_debug("trps_handle_update: inforec rejected by filter.");
1094 continue; /* just go on to the next record */
1097 switch (trp_inforec_get_type(rec)) {
1098 case TRP_INFOREC_TYPE_ROUTE:
1099 tr_debug("trps_handle_update: handling route inforec.");
1100 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1101 tr_notice("trps_handle_update: error handling route inforec.");
1103 case TRP_INFOREC_TYPE_COMMUNITY:
1104 tr_debug("trps_handle_update: handling community inforec.");
1105 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1106 tr_notice("trps_handle_update: error handling community inforec.");
1110 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1117 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1120 tr_notice("trps_validate_request: null TRP request.");
1124 if (trp_req_get_comm(req)==NULL) {
1125 tr_notice("trps_validate_request: received TRP request with null community.");
1129 if (trp_req_get_realm(req)==NULL) {
1130 tr_notice("trps_validate_request: received TRP request with null realm.");
1134 if (trp_req_get_peer(req)==NULL) {
1135 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1142 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1143 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1146 TR_NAME *exclude_peer_label)
1148 TRP_ROUTE **entry=NULL;
1149 TRP_ROUTE *best=NULL;
1150 TRP_PEER *route_peer = NULL;
1153 unsigned int kk_min=0;
1154 unsigned int min_metric=TRP_METRIC_INFINITY;
1156 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1157 for (kk=0; kk<n_entry; kk++) {
1158 if (trp_route_get_metric(entry[kk]) < min_metric) {
1159 if (exclude_peer_label != NULL) {
1160 if (!trp_route_is_local(entry[kk])) {
1161 /* route is not local, check the peer label */
1162 route_peer = trp_ptable_find_gss_name(trps->ptable,
1163 trp_route_get_peer(entry[kk]));
1164 if (route_peer == NULL) {
1165 tr_err("trps_find_best_route: unknown peer GSS name (%.*s) for route %d to %.*s/%.*s",
1166 trp_route_get_peer(entry[kk])->len, trp_route_get_peer(entry[kk])->buf,
1168 realm->len, realm->buf,
1169 comm->len, comm->buf);
1170 continue; /* unknown peer, skip the route */
1172 if (0 == tr_name_cmp(exclude_peer_label, trp_peer_get_label(route_peer))) {
1173 /* we're excluding this peer - skip the route */
1178 /* if we get here, we're not excluding the route */
1180 min_metric = trp_route_get_metric(entry[kk]);
1184 if (trp_metric_is_finite(min_metric))
1191 /* TODO: think this through more carefully. At least ought to add hysteresis
1192 * to avoid flapping between routers or routes. */
1193 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1195 size_t n_comm=0, ii=0;
1196 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1197 size_t n_realm=0, jj=0;
1198 TR_NAME **realm=NULL;
1199 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1200 unsigned int best_metric=0, cur_metric=0;
1202 for (ii=0; ii<n_comm; ii++) {
1203 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1204 for (jj=0; jj<n_realm; jj++) {
1205 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1206 if (best_route==NULL)
1207 best_metric=TRP_METRIC_INFINITY;
1209 best_metric=trp_route_get_metric(best_route);
1211 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1212 if (cur_route!=NULL) {
1213 cur_metric=trp_route_get_metric(cur_route);
1214 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1215 /* The new route has a lower metric than the previous, and is finite. Accept. */
1216 trp_route_set_selected(cur_route, 0);
1217 trp_route_set_selected(best_route, 1);
1218 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1219 trp_route_set_selected(cur_route, 0);
1220 } else if (trp_metric_is_finite(best_metric)) {
1221 trp_route_set_selected(best_route, 1);
1226 realm=NULL; n_realm=0;
1230 comm=NULL; n_comm=0;
1235 /* true if curtime >= expiry */
1236 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1238 return (tr_cmp_timespec(curtime, expiry) >= 0);
1241 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1242 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1243 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1245 struct timespec sweep_time={0,0};
1246 TRP_ROUTE **entry=NULL;
1250 /* use a single time for the entire sweep */
1251 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1252 tr_err("trps_sweep_routes: could not read realtime clock.");
1253 sweep_time.tv_sec=0;
1254 sweep_time.tv_nsec=0;
1258 entry= trp_rtable_get_entries(NULL, trps->rtable, &n_entry); /* must talloc_free *entry */
1260 /* loop over the entries */
1261 for (ii=0; ii<n_entry; ii++) {
1262 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1263 tr_debug("trps_sweep_routes: route expired.");
1264 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1266 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1267 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1270 /* set metric to infinity and reset timer */
1271 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1272 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1273 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1274 trp_route_get_interval(entry[ii]),
1275 trp_route_get_expiry(entry[ii])));
1285 /* Sweep for expired communities/realms/memberships. */
1286 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1288 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1289 struct timespec sweep_time={0,0};
1290 struct timespec tmp = {0};
1291 TR_COMM_MEMB *memb=NULL;
1292 TR_COMM_ITER *iter=NULL;
1293 TRP_RC rc=TRP_ERROR;
1295 /* use a single time for the entire sweep */
1296 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1297 tr_err("trps_sweep_ctable: could not read realtime clock.");
1298 sweep_time.tv_sec=0;
1299 sweep_time.tv_nsec=0;
1303 /* iterate all memberships */
1304 iter=tr_comm_iter_new(tmp_ctx);
1306 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1310 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1312 memb=tr_comm_memb_iter_all_next(iter)) {
1313 if (tr_comm_memb_get_origin(memb)==NULL)
1314 continue; /* do not expire local entries */
1316 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1317 if (tr_comm_memb_get_times_expired(memb)>0) {
1318 /* Already expired once; flush. */
1319 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1320 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1321 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1322 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1323 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)));
1324 tr_comm_table_remove_memb(trps->ctable, memb);
1325 tr_comm_memb_free(memb);
1327 /* This is the first expiration. Note this and reset the expiry time. */
1328 tr_comm_memb_expire(memb);
1329 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1330 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1331 timespec_to_str(tr_clock_convert(TRP_CLOCK, &sweep_time, CLOCK_REALTIME, &tmp)),
1332 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)),
1333 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1334 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1335 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1340 /* get rid of any unreferenced realms, etc */
1341 tr_comm_table_sweep(trps->ctable);
1344 talloc_free(tmp_ctx);
1349 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1351 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1352 return TRP_METRIC_INVALID;
1354 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1355 return TRP_METRIC_INFINITY;
1357 if (trp_metric_is_finite(m1+m2))
1360 return TRP_METRIC_INFINITY;
1363 /* convert an rentry into a new trp update info record */
1364 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1366 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1367 unsigned int linkcost=0;
1370 if (trp_route_is_local(route))
1373 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1374 trp_route_get_peer(route)));
1378 * This is where we add the link cost (currently always 1) to the next peer.
1380 * Here, set next_hop to our TID address/port rather than passing along our own
1381 * next_hop. That is the one *we* use to forward requests. We are advertising
1382 * ourselves as a hop for our peers.
1384 if ((TRP_SUCCESS != trp_inforec_set_trust_router(rec,
1385 trp_route_dup_trust_router(route),
1386 trp_route_get_trust_router_port(route)))
1387 ||(TRP_SUCCESS != trp_inforec_set_next_hop(rec,
1388 tr_new_name(trps->hostname),
1390 ||(TRP_SUCCESS != trp_inforec_set_metric(rec,
1391 trps_metric_add(trp_route_get_metric(route),
1393 ||(TRP_SUCCESS != trp_inforec_set_interval(rec, trps_get_update_interval(trps)))) {
1394 tr_err("trps_route_to_inforec: error creating route update.");
1402 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1404 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1405 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1406 TRP_INFOREC *rec=NULL;
1409 tr_err("trps_route_to_upd: could not create update message.");
1412 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1413 if (trp_upd_get_realm(upd)==NULL) {
1414 tr_err("trps_route_to_upd: could not copy realm.");
1415 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1418 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1419 if (trp_upd_get_comm(upd)==NULL) {
1420 tr_err("trps_route_to_upd: could not copy comm.");
1421 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1424 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1426 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1427 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1428 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1429 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1432 trp_upd_add_inforec(upd, rec);
1435 talloc_steal(mem_ctx, upd);
1438 talloc_free(tmp_ctx);
1442 /* select the correct route to comm/realm to be announced to peer */
1443 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_label)
1445 TRP_ROUTE *route = NULL;
1446 TRP_PEER *route_peer = NULL;
1447 TR_NAME *route_peer_label = NULL;
1449 /* Take the currently selected route unless it is through the peer we're sending the update to.
1450 * I.e., enforce the split horizon rule. Start by looking up the currently selected route. */
1451 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1453 /* No selected route, this should only happen if the only route has been retracted,
1454 * in which case we do not want to advertise it. */
1458 /* Check whether it's local. */
1459 if (trp_route_is_local(route)) {
1460 /* It is always ok to announce a local route */
1461 tr_debug("trps_select_realm_update: selected route for %.*s/%.*s is local",
1462 realm->len, realm->buf,
1463 comm->len, comm->buf);
1465 /* It's not local. Get the route's peer and check whether it's the same place we
1466 * got the selected route from. Peer should always correspond to an entry in our
1468 tr_debug("trps_select_realm_update: selected route for %.*s/%.*s is not local",
1469 realm->len, realm->buf,
1470 comm->len, comm->buf);
1471 route_peer = trp_ptable_find_gss_name(trps->ptable, trp_route_get_peer(route));
1472 if (route_peer == NULL) {
1473 tr_err("trps_select_realm_update: unknown peer GSS name (%.*s) for selected route for %.*s/%.*s",
1474 trp_route_get_peer(route)->len, trp_route_get_peer(route)->buf,
1475 realm->len, realm->buf,
1476 comm->len, comm->buf);
1479 route_peer_label = trp_peer_get_label(route_peer);
1480 if (route_peer_label == NULL) {
1481 tr_err("trps_select_realm_update: error retrieving peer label for selected route for %.*s/%.*s",
1482 realm->len, realm->buf,
1483 comm->len, comm->buf);
1487 /* see if these match */
1488 tr_debug("trps_select_realm_update: %.*s vs %.*s",
1489 peer_label->len, peer_label->buf,
1490 route_peer_label->len, route_peer_label->buf);
1492 if (0==tr_name_cmp(peer_label, route_peer_label)) {
1493 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1494 tr_debug("trps_select_realm_update: matched, finding alternate route");
1495 route=trps_find_best_route(trps, comm, realm, peer_label);
1496 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route)))) {
1497 tr_debug("trps_select_realm_update: no route to %.*s/%.*s suitable to advertise to %.*s",
1498 realm->len, realm->buf,
1499 comm->len, comm->buf,
1500 peer_label->len, peer_label->buf);
1501 return NULL; /* don't advertise a nonexistent or retracted route */
1508 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1509 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1511 TRPS_INSTANCE *trps,
1512 TR_NAME *peer_label,
1516 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1517 TR_NAME **realm=NULL;
1520 TRP_ROUTE *best=NULL;
1526 for (ii=0; ii<n_comm; ii++) {
1527 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1528 for (jj=0; jj<n_realm; jj++) {
1529 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_label);
1530 /* If we found a route, add it to the list. If triggered!=0, then only
1531 * add triggered routes. */
1532 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1533 upd=trps_route_to_upd(mem_ctx, trps, best);
1535 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1538 g_ptr_array_add(updates, upd);
1554 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1556 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1557 TRP_INFOREC *rec=NULL;
1563 comm=tr_comm_memb_get_comm(memb);
1564 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1568 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1573 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1578 if ((NULL!=tr_comm_get_apcs(comm)) &&
1579 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1580 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1581 (NULL==trp_inforec_get_apcs(rec)))) {
1586 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1587 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1588 (NULL==trp_inforec_get_owner_realm(rec)))) {
1593 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1594 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1595 (NULL==trp_inforec_get_owner_contact(rec)))) {
1600 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1601 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1606 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1612 talloc_steal(mem_ctx, rec);
1615 talloc_free(tmp_ctx);
1619 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1620 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx,
1621 TRPS_INSTANCE *trps,
1622 TR_NAME *peer_label,
1626 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1627 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1628 TRP_INFOREC *rec=NULL;
1629 TR_COMM_ITER *iter=NULL;
1630 TR_COMM_MEMB *memb=NULL;
1635 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1636 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1637 /* leave peer empty */
1639 iter=tr_comm_iter_new(tmp_ctx);
1641 tr_err("trps_comm_update: unable to allocate iterator.");
1646 /* now add inforecs */
1647 switch (realm->role) {
1649 memb=tr_comm_table_find_idp_memb(trps->ctable,
1650 tr_realm_get_id(realm),
1651 tr_comm_get_id(comm));
1654 memb=tr_comm_table_find_rp_memb(trps->ctable,
1655 tr_realm_get_id(realm),
1656 tr_comm_get_id(comm));
1662 for (memb=tr_comm_memb_iter_first(iter, memb);
1664 memb=tr_comm_memb_iter_next(iter)) {
1665 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1667 tr_err("trps_comm_update: unable to allocate inforec.");
1671 trp_upd_add_inforec(upd, rec);
1675 if (trp_upd_get_inforec(upd)==NULL)
1676 upd=NULL; /* no inforecs, no reason to send the update */
1678 talloc_steal(mem_ctx, upd); /* success! */
1681 talloc_free(tmp_ctx);
1685 /* Find all community updates to send to a peer and add these as TR_UPD records
1686 * to the updates GPtrArray. */
1687 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1689 TRPS_INSTANCE *trps,
1690 TR_NAME *peer_label,
1693 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1694 TR_COMM_ITER *comm_iter=NULL;
1696 TR_COMM_ITER *realm_iter=NULL;
1697 TR_REALM *realm=NULL;
1699 TRP_RC rc=TRP_ERROR;
1701 /* currently do not send any communities on triggered updates */
1707 comm_iter=tr_comm_iter_new(tmp_ctx);
1708 realm_iter=tr_comm_iter_new(tmp_ctx);
1709 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1710 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1715 /* do every community */
1716 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1718 comm=tr_comm_table_iter_next(comm_iter)) {
1719 /* do every realm in this community */
1720 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1721 tr_comm_get_id(comm)->len,
1722 tr_comm_get_id(comm)->buf);
1723 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1725 realm=tr_realm_iter_next(realm_iter)) {
1726 /* get the update for this comm/realm */
1727 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1728 tr_realm_get_id(realm)->len,
1729 tr_realm_get_id(realm)->buf);
1730 upd=trps_comm_update(mem_ctx, trps, peer_label, comm, realm);
1732 g_ptr_array_add(updates, upd);
1737 talloc_free(tmp_ctx);
1742 * Filter the inforecs in a single update
1744 * @param filt The filter to apply
1745 * @param upd The update to filter
1747 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1749 TRP_INFOREC *this=NULL, *next=NULL;
1750 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1751 TR_FILTER_TARGET *target=NULL;
1753 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1755 target= tr_filter_target_trp_inforec(NULL, upd, this);
1757 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1758 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1761 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1762 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1763 /* Either no filter matched or one matched and rejected this record.
1764 * Also filter out record if we were unable to allocate a target. */
1765 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1768 tr_filter_target_free(target);
1773 * May shuffle the update list.
1775 * @param filters The filter set for the relevant TRP peer
1776 * @param updates GPtrArray of updates to filter
1778 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1783 /* Walk backward through the array so we can remove elements. Careful about loop
1784 * termination - remember that ii is unsigned. */
1785 for (ii=updates->len; ii>0; ii--) {
1786 upd=g_ptr_array_index(updates, ii-1);
1787 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1788 /* see if we removed all the records from this update */
1789 if (trp_upd_num_inforecs(upd)==0)
1790 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1794 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1795 static void trps_trp_upd_destroy(gpointer data)
1797 trp_upd_free((TRP_UPD *)data);
1800 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1801 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1803 TRP_UPDATE_TYPE update_type,
1807 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1808 TR_MSG msg; /* not a pointer! */
1810 TRP_ROUTE *route=NULL;
1813 TRP_RC rc=TRP_ERROR;
1814 TR_NAME *peer_label=trp_peer_get_label(peer);
1815 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1817 if (updates==NULL) {
1818 tr_err("trps_update_one_peer: unable to allocate updates array.");
1823 switch (update_type) {
1824 case TRP_UPDATE_TRIGGERED:
1825 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1826 peer_label->len, peer_label->buf);
1828 case TRP_UPDATE_SCHEDULED:
1829 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1830 peer_label->len, peer_label->buf);
1832 case TRP_UPDATE_REQUESTED:
1833 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1834 peer_label->len, peer_label->buf);
1837 tr_err("trps_update_one_peer: invalid update type requested.");
1842 /* First, gather route updates. */
1843 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1844 if ((comm==NULL) && (realm==NULL)) {
1846 rc=trps_select_route_updates_for_peer(tmp_ctx,
1850 update_type==TRP_UPDATE_TRIGGERED);
1851 } else if ((comm!=NULL) && (realm!=NULL)) {
1852 /* a single community/realm was requested */
1853 route=trps_select_realm_update(trps, comm, realm, peer_label);
1855 /* we have no actual update to send back, MUST send a retraction */
1856 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1857 route=trp_route_new(tmp_ctx);
1858 trp_route_set_comm(route, tr_dup_name(comm));
1859 trp_route_set_realm(route, tr_dup_name(realm));
1860 trp_route_set_peer(route, tr_new_name(""));
1861 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1862 trp_route_set_trust_router(route, tr_new_name(""));
1863 trp_route_set_next_hop(route, tr_new_name(""));
1865 upd=trps_route_to_upd(tmp_ctx, trps, route);
1867 tr_err("trps_update_one_peer: unable to allocate route update.");
1871 g_ptr_array_add(updates, upd);
1873 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1878 /* Second, gather community updates */
1879 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1880 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1882 /* see if we have anything to send */
1883 if (updates->len<=0)
1884 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1886 /* Apply outbound TRP filters for this peer */
1887 trps_filter_outbound_updates(peer->filters, updates);
1889 if (updates->len<=0)
1890 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1892 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1893 for (ii=0; ii<updates->len; ii++) {
1894 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1895 /* now encode the update message */
1896 tr_msg_set_trp_upd(&msg, upd);
1897 encoded = tr_msg_encode(NULL, &msg);
1898 if (encoded == NULL) {
1899 tr_err("trps_update_one_peer: error encoding update.");
1904 tr_debug("trps_update_one_peer: adding message to queue.");
1905 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1906 tr_err("trps_update_one_peer: error queueing update.");
1908 tr_debug("trps_update_one_peer: update queued successfully.");
1910 tr_msg_free_encoded(encoded);
1920 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1921 talloc_free(tmp_ctx);
1925 /* all routes/communities to all peers */
1926 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1928 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1929 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1930 TRP_PEER *peer=NULL;
1931 TRP_RC rc=TRP_SUCCESS;
1933 if (trps->ptable==NULL)
1934 return TRP_SUCCESS; /* no peers, nothing to do */
1937 tr_err("trps_update: failed to allocate peer table iterator.");
1938 talloc_free(tmp_ctx);
1942 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1943 (peer!=NULL) && (rc==TRP_SUCCESS);
1944 peer=trp_ptable_iter_next(iter))
1946 if (!trps_peer_connected(trps, peer)) {
1947 TR_NAME *peer_label=trp_peer_get_label(peer);
1948 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1949 peer_label->len, peer_label->buf);
1952 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1955 tr_debug("trps_update: rc=%u after attempting update.", rc);
1956 trp_ptable_iter_free(iter);
1957 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1958 talloc_free(tmp_ctx);
1962 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1964 trp_rtable_add(trps->rtable, route); /* should return status */
1968 /* steals the peer object */
1969 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1971 if (trps->ptable==NULL) {
1972 trps->ptable=trp_ptable_new(trps);
1973 if (trps->ptable==NULL)
1976 return trp_ptable_add(trps->ptable, peer);
1979 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1981 if (trps->ptable==NULL)
1984 return trp_ptable_find_gss_name(trps->ptable, gssname);
1987 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1989 if (trps->ptable==NULL)
1992 return trp_ptable_find_servicename(trps->ptable, servicename);
1995 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1997 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
2001 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
2008 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
2011 TR_NAME *realm=NULL;
2013 tr_debug("trps_handle_request: handling TRP request.");
2015 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
2016 tr_notice("trps_handle_request: received invalid TRP request.");
2020 if (!trp_req_is_wildcard(req)) {
2021 comm=trp_req_get_comm(req);
2022 realm=trp_req_get_realm(req);
2023 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
2024 comm->len, comm->buf, realm->len, realm->buf);
2026 tr_debug("trps_handle_request: all routes requested.");
2027 /* leave comm/realm NULL */
2029 return trps_update_one_peer(trps,
2030 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
2031 TRP_UPDATE_REQUESTED,
2037 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
2039 TRP_RC rc=TRP_ERROR;
2041 switch (tr_msg_get_msg_type(tr_msg)) {
2043 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
2044 if (rc==TRP_SUCCESS) {
2045 rc=trps_update_active_routes(trps);
2046 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
2051 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
2055 /* unknown error or one we don't care about (e.g., TID messages) */
2060 /* send wildcard route request to a peer */
2061 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
2063 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
2064 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
2065 TR_MSG msg; /* not a pointer */
2066 TRP_REQ *req=trp_req_new(tmp_ctx);
2068 TRP_RC rc=TRP_ERROR;
2071 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
2075 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
2076 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
2081 tr_msg_set_trp_req(&msg, req);
2082 encoded= tr_msg_encode(NULL, &msg);
2083 if (encoded==NULL) {
2084 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
2089 tr_debug("trps_wildcard_route_req: adding message to queue.");
2090 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
2091 tr_err("trps_wildcard_route_req: error queueing request.");
2094 tr_debug("trps_wildcard_route_req: request queued successfully.");
2100 tr_msg_free_encoded(encoded);
2104 talloc_free(tmp_ctx);