2 * Copyright (c) 2016, JANET(UK)
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6 * modification, are permitted provided that the following conditions
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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->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 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 */
366 /* update provenance if necessary */
367 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
371 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
375 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
376 tr_msg_free_decoded(*msg);
378 return TRP_UNSUPPORTED;
384 int trps_get_listener(TRPS_INSTANCE *trps,
385 TRPS_MSG_FUNC msg_handler,
386 TRP_AUTH_FUNC auth_handler,
387 const char *hostname,
396 n_fd = tr_sock_listen_all(port, fd_out, max_fd);
399 tr_err("trps_get_listener: Error opening port %d.");
401 /* opening port succeeded */
402 tr_info("trps_get_listener: Opened port %d.", port);
404 /* make the sockets non-blocking */
405 for (ii=0; ii<n_fd; ii++) {
406 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
407 tr_err("trps_get_listener: Error setting O_NONBLOCK.");
408 for (ii=0; ii<n_fd; ii++) {
419 /* store the caller's request handler & cookie */
420 trps->msg_handler = msg_handler;
421 trps->auth_handler = auth_handler;
422 trps->hostname = talloc_strdup(trps, hostname);
424 trps->cookie = cookie;
430 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
432 /* try to establish a GSS context */
433 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
434 tr_notice("trps_authorize_connection: failed to authorize connection");
435 trp_connection_close(conn);
438 tr_notice("trps_authorize_connection: authorized connection");
442 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
447 /* loop as long as the connection exists */
448 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
449 rc=trps_read_message(trps, conn, &msg);
452 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
456 trp_connection_close(conn);
460 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
464 tr_debug("trps_handle_connection: connection closed.");
467 /* TODO: check realm/comm, now part of the update instead of inforec */
468 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
471 tr_notice("trps_validate_update: null TRP update.");
475 if (trp_upd_get_realm(upd)==NULL) {
476 tr_notice("trps_validate_update: received TRP update without realm.");
480 if (trp_upd_get_comm(upd)==NULL) {
481 tr_notice("trps_validate_update: received TRP update without community.");
485 if (trp_upd_get_inforec(upd)==NULL) {
486 tr_notice("trps_validate_update: received TRP update with no info records.");
490 if (trp_upd_get_peer(upd)==NULL) {
491 tr_notice("trps_validate_update: received TRP update without origin peer information.");
499 /* ensure that the update could be accepted if feasible */
500 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
502 switch(trp_inforec_get_type(rec)) {
503 case TRP_INFOREC_TYPE_ROUTE:
504 if ((trp_inforec_get_trust_router(rec)==NULL)
505 || (trp_inforec_get_next_hop(rec)==NULL)) {
506 tr_debug("trps_validate_inforec: missing record info.");
510 /* check for valid metric */
511 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
512 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
516 /* check for valid interval */
517 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
518 tr_debug("trps_validate_inforec: invalid interval.");
523 case TRP_INFOREC_TYPE_COMMUNITY:
524 /* TODO: validate community updates */
528 tr_notice("trps_validate_inforec: unsupported record type.");
529 return TRP_UNSUPPORTED;
535 /* link cost to a peer */
536 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
541 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
543 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
545 return TRP_METRIC_INFINITY;
546 return trp_route_get_metric(entry) + trps_cost(trps, peer);
549 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
551 unsigned int rec_metric=trp_inforec_get_metric(rec);
552 unsigned int new_metric=0;
553 unsigned int current_metric=0;
554 TR_NAME *next_hop=NULL;
556 /* we check these in the validation stage, but just in case... */
557 if (trp_metric_is_invalid(rec_metric))
560 /* retractions (aka infinite metrics) are always feasible */
561 if (trp_metric_is_infinite(rec_metric))
564 /* updates from our current next hop are always feasible*/
565 next_hop=trps_get_next_hop(trps, comm, realm);
567 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
572 /* compare the existing metric we advertise to what we would advertise
573 * if we accept this update */
574 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
575 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
576 if (new_metric <= current_metric)
582 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
583 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
585 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
586 if (0!=clock_gettime(TRP_CLOCK, ts)) {
587 tr_err("trps_compute_expiry: could not read realtime clock.");
591 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
592 ts->tv_sec += small_factor*interval;
596 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
598 TRP_ROUTE *entry=NULL;
600 entry=trp_rtable_get_entry(trps->rtable,
601 trp_upd_get_comm(upd),
602 trp_upd_get_realm(upd),
603 trp_inforec_get_next_hop(rec));
605 entry=trp_route_new(NULL);
607 tr_err("trps_accept_update: unable to allocate new entry.");
611 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
612 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
613 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
614 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
615 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
616 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
617 if ((trp_route_get_comm(entry)==NULL)
618 ||(trp_route_get_realm(entry)==NULL)
619 ||(trp_route_get_peer(entry)==NULL)
620 ||(trp_route_get_trust_router(entry)==NULL)
621 ||(trp_route_get_next_hop(entry)==NULL)) {
622 /* at least one field could not be allocated */
623 tr_err("trps_accept_update: unable to allocate all fields for entry.");
624 trp_route_free(entry);
627 trp_rtable_add(trps->rtable, entry);
630 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
631 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
632 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
633 * time unset on a new route entry. */
634 tr_debug("trps_accept_update: accepting route update.");
635 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
636 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
638 /* check whether the trust router has changed */
639 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
640 trp_inforec_get_trust_router(rec))) {
641 /* The name changed. Set this route as triggered. */
642 tr_debug("trps_accept_update: trust router for route changed.");
643 trp_route_set_triggered(entry, 1);
644 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
646 if (!trps_route_retracted(trps, entry)) {
647 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
648 trp_route_set_expiry(entry, trps_compute_expiry(trps,
649 trp_route_get_interval(entry),
650 trp_route_get_expiry(entry)));
656 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
658 TRP_ROUTE *route=NULL;
659 TR_COMM *comm = NULL;
662 /* determine feasibility */
663 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
664 tr_debug("trps_handle_update: record feasibility=%d", feas);
666 /* verify that the community is an APC */
667 comm = tr_comm_table_find_comm(trps->ctable, trp_upd_get_comm(upd));
669 /* We don't know this community. Reject the route. */
670 tr_debug("trps_handle_updates: community %.*s unknown, ignoring route for %.*s",
671 trp_upd_get_comm(upd)->len, trp_upd_get_comm(upd)->buf,
672 trp_upd_get_realm(upd)->len, trp_upd_get_realm(upd)->buf);
673 } else if (tr_comm_get_type(comm) != TR_COMM_APC) {
674 /* The community in a route request *must* be an APC. This was not - ignore it. */
675 tr_debug("trps_handle_updates: community %.*s is not an APC, ignoring route for %.*s",
676 trp_upd_get_comm(upd)->len, trp_upd_get_comm(upd)->buf,
677 trp_upd_get_realm(upd)->len, trp_upd_get_realm(upd)->buf);
679 /* do we have an existing route? */
680 route=trps_get_route(trps,
681 trp_upd_get_comm(upd),
682 trp_upd_get_realm(upd),
683 trp_upd_get_peer(upd));
685 /* there was a route table entry already */
686 tr_debug("trps_handle_updates: route entry already exists.");
688 /* Update is feasible. Accept it. */
689 trps_accept_update(trps, upd, rec);
691 /* Update is infeasible. Ignore it unless the trust router has changed. */
692 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
693 trp_inforec_get_trust_router(rec))) {
694 /* the trust router associated with the route has changed, treat update as a retraction */
695 trps_retract_route(trps, route);
699 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
700 tr_debug("trps_handle_update: no route entry exists yet.");
701 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
702 trps_accept_update(trps, upd, rec);
709 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
712 TR_NAME *this_name=NULL;
716 return 0; /* no provenance list, so it has no names in it */
718 /* now check to see if name is in the provenance */
719 for (ii=0; ii<json_array_size(prov); ii++) {
720 s=json_string_value(json_array_get(prov, ii));
722 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
726 this_name=tr_new_name(s);
727 if (this_name==NULL) {
728 tr_debug("trps_name_in_provenance: unable to allocate name.");
731 if (0==tr_name_cmp(name, this_name)) {
732 tr_free_name(this_name);
735 tr_free_name(this_name);
740 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
742 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
743 TR_COMM *comm=tr_comm_new(tmp_ctx);
746 tr_debug("trps_create_new_comm: unable to allocate new community.");
749 /* fill in the community with info */
750 tr_comm_set_id(comm, tr_dup_name(comm_id));
751 if (tr_comm_get_id(comm)==NULL) {
752 tr_debug("trps_create_new_comm: unable to allocate community name.");
756 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
757 if (trp_inforec_get_apcs(rec)!=NULL) {
758 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
759 if (tr_comm_get_apcs(comm)==NULL) {
760 tr_debug("trps_create_new_comm: unable to allocate APC list.");
765 if (trp_inforec_get_owner_realm(rec)!=NULL) {
766 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
767 if (tr_comm_get_owner_realm(comm)==NULL) {
768 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
773 if (trp_inforec_get_owner_contact(rec)!=NULL) {
774 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
775 if (tr_comm_get_owner_contact(comm)==NULL) {
776 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
781 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
782 talloc_steal(mem_ctx, comm);
785 talloc_free(tmp_ctx);
789 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *comm, TR_NAME *realm_id, TRP_INFOREC *rec)
791 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
792 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
795 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
798 /* fill in the realm */
799 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
800 if (tr_rp_realm_get_id(rp)==NULL) {
801 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
805 talloc_steal(mem_ctx, rp);
808 talloc_free(tmp_ctx);
812 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx,
817 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
818 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
819 TR_APC *realm_apcs = NULL;
822 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
825 /* fill in the realm */
826 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
827 if (tr_idp_realm_get_id(idp)==NULL) {
828 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
833 /* Set the APCs. If the community is a CoI, copy its APCs. If it is an APC, then
834 * that community itself is the APC for the realm. */
835 if (trp_inforec_get_comm_type(rec) == TR_COMM_APC) {
836 /* the community is an APC for this realm */
837 realm_apcs = tr_apc_new(tmp_ctx);
838 if (realm_apcs == NULL) {
839 tr_debug("trps_create_new_idp_realm: unable to allocate new APC list.");
844 tr_apc_set_id(realm_apcs, tr_dup_name(comm_id));
845 if (tr_apc_get_id(realm_apcs) == NULL) {
846 tr_debug("trps_create_new_idp_realm: unable to allocate new APC name.");
851 /* the community is not an APC for this realm */
852 realm_apcs = trp_inforec_get_apcs(rec);
853 if (realm_apcs == NULL) {
854 tr_debug("trps_create_new_idp_realm: no APCs for realm %.*s/%.*s, cannot add.",
855 realm_id->len, realm_id->buf,
856 comm_id->len, comm_id->buf);
861 /* we have APCs, make our own copy */
862 realm_apcs = tr_apc_dup(tmp_ctx, realm_apcs);
863 if (realm_apcs == NULL) {
864 tr_debug("trps_create_new_idp_realm: unable to duplicate APC list.");
870 /* Whether the community is an APC or CoI, the APCs for the realm are in realm_apcs */
871 tr_idp_realm_set_apcs(idp, realm_apcs); /* takes realm_apcs out of tmp_ctx on success */
872 if (tr_idp_realm_get_apcs(idp) == NULL) {
873 tr_debug("trps_create_new_idp_realm: unable to set APC list for new realm.");
878 idp->origin=TR_REALM_DISCOVERED;
880 talloc_steal(mem_ctx, idp);
883 talloc_free(tmp_ctx);
887 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
889 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
890 TR_NAME *comm_id=trp_upd_get_comm(upd);
891 TR_NAME *realm_id=trp_upd_get_realm(upd);
892 TR_NAME *origin_id=NULL;
893 TR_NAME *our_peer_label=NULL;
895 TR_RP_REALM *rp_realm=NULL;
896 TR_IDP_REALM *idp_realm=NULL;
897 struct timespec expiry={0,0};
900 if ((comm_id==NULL) || (realm_id==NULL))
903 origin_id=trp_inforec_dup_origin(rec);
907 /* see whether we want to add this */
908 our_peer_label=trps_dup_label(trps);
909 if (our_peer_label==NULL) {
910 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
914 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
915 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
917 /* no loop occurring, accept the update */
918 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
920 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
921 comm_id->len, comm_id->buf);
922 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
924 tr_debug("trps_handle_inforec_comm: unable to create new community.");
927 if (tr_comm_table_add_comm(trps->ctable, comm) != 0)
929 tr_debug("trps_handle_inforec_comm: unable to add community to community table.");
933 /* TODO: see if other comm data match the new inforec and update or complain */
935 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
936 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
939 switch (trp_inforec_get_role(rec)) {
941 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
942 if (rp_realm==NULL) {
943 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
944 realm_id->len, realm_id->buf);
945 rp_realm= trps_create_new_rp_realm(tmp_ctx, tr_comm_get_id(comm), realm_id, rec);
946 if (rp_realm==NULL) {
947 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
948 /* we may leave an unused community in the table, but it will only last until
949 * the next table sweep if it does not get any realms before that happens */
952 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
954 /* TODO: if realm existed, see if data match the new inforec and update or complain */
955 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
956 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
957 realm_id->len, realm_id->buf,
958 comm_id->len, comm_id->buf,
959 origin_id->len, origin_id->buf);
962 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
963 if (idp_realm==NULL) {
964 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
965 realm_id->len, realm_id->buf);
966 idp_realm= trps_create_new_idp_realm(tmp_ctx, tr_comm_get_id(comm), realm_id, rec);
967 if (idp_realm==NULL) {
968 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
969 /* we may leave an unused community in the table, but it will only last until
970 * the next table sweep if it does not get any realms before that happens */
973 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
975 /* TODO: if realm existed, see if data match the new inforec and update or complain */
976 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
977 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
978 realm_id->len, realm_id->buf,
979 comm_id->len, comm_id->buf,
980 origin_id->len, origin_id->buf);
983 tr_debug("trps_handle_inforec_comm: unable to add realm.");
991 if (our_peer_label!=NULL)
992 tr_free_name(our_peer_label);
994 tr_free_name(origin_id);
995 talloc_free(tmp_ctx);
1000 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
1002 * @param trps Active TRPS instance
1003 * @param upd TRP_UPD that contains the inforec to filter
1004 * @param rec Inforec to filter
1005 * @return 1 if accepted by the filter, 0 otherwise
1007 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
1009 TRP_PEER *peer=NULL;
1010 TR_NAME *peer_name=NULL;
1011 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1012 TR_FILTER_TARGET *target=NULL;
1015 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
1016 peer_name=trp_upd_get_peer(upd);
1017 peer=trps_get_peer_by_gssname(trps, peer_name);
1019 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
1025 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
1026 target= tr_filter_target_trp_inforec(NULL, upd, rec);
1028 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1029 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
1032 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
1033 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
1036 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1037 /* either the filter did not match or it matched a reject rule or allocating the target failed */
1042 tr_filter_target_free(target);
1044 /* filter matched an accept rule */
1049 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
1051 TRP_INFOREC *rec=NULL;
1053 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
1054 tr_notice("trps_handle_update: received invalid TRP update.");
1058 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1059 /* validate/sanity check the record update */
1060 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
1061 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
1066 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1067 if (!trps_filter_inbound_inforec(trps, upd, rec)) {
1068 tr_debug("trps_handle_update: inforec rejected by filter.");
1069 continue; /* just go on to the next record */
1072 switch (trp_inforec_get_type(rec)) {
1073 case TRP_INFOREC_TYPE_ROUTE:
1074 tr_debug("trps_handle_update: handling route inforec.");
1075 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1076 tr_notice("trps_handle_update: error handling route inforec.");
1078 case TRP_INFOREC_TYPE_COMMUNITY:
1079 tr_debug("trps_handle_update: handling community inforec.");
1080 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1081 tr_notice("trps_handle_update: error handling community inforec.");
1085 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1092 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1095 tr_notice("trps_validate_request: null TRP request.");
1099 if (trp_req_get_comm(req)==NULL) {
1100 tr_notice("trps_validate_request: received TRP request with null community.");
1104 if (trp_req_get_realm(req)==NULL) {
1105 tr_notice("trps_validate_request: received TRP request with null realm.");
1109 if (trp_req_get_peer(req)==NULL) {
1110 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1117 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1118 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1121 TR_NAME *exclude_peer_label)
1123 TRP_ROUTE **entry=NULL;
1124 TRP_ROUTE *best=NULL;
1125 TRP_PEER *route_peer = NULL;
1128 unsigned int kk_min=0;
1129 unsigned int min_metric=TRP_METRIC_INFINITY;
1131 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1132 for (kk=0; kk<n_entry; kk++) {
1133 if (trp_route_get_metric(entry[kk]) < min_metric) {
1134 if (exclude_peer_label != NULL) {
1135 if (!trp_route_is_local(entry[kk])) {
1136 /* route is not local, check the peer label */
1137 route_peer = trp_ptable_find_gss_name(trps->ptable,
1138 trp_route_get_peer(entry[kk]));
1139 if (route_peer == NULL) {
1140 tr_err("trps_find_best_route: unknown peer GSS name (%.*s) for route %d to %.*s/%.*s",
1141 trp_route_get_peer(entry[kk])->len, trp_route_get_peer(entry[kk])->buf,
1143 realm->len, realm->buf,
1144 comm->len, comm->buf);
1145 continue; /* unknown peer, skip the route */
1147 if (0 == tr_name_cmp(exclude_peer_label, trp_peer_get_label(route_peer))) {
1148 /* we're excluding this peer - skip the route */
1153 /* if we get here, we're not excluding the route */
1155 min_metric = trp_route_get_metric(entry[kk]);
1159 if (trp_metric_is_finite(min_metric))
1166 /* TODO: think this through more carefully. At least ought to add hysteresis
1167 * to avoid flapping between routers or routes. */
1168 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1170 size_t n_comm=0, ii=0;
1171 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1172 size_t n_realm=0, jj=0;
1173 TR_NAME **realm=NULL;
1174 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1175 unsigned int best_metric=0, cur_metric=0;
1177 for (ii=0; ii<n_comm; ii++) {
1178 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1179 for (jj=0; jj<n_realm; jj++) {
1180 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1181 if (best_route==NULL)
1182 best_metric=TRP_METRIC_INFINITY;
1184 best_metric=trp_route_get_metric(best_route);
1186 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1187 if (cur_route!=NULL) {
1188 cur_metric=trp_route_get_metric(cur_route);
1189 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1190 /* The new route has a lower metric than the previous, and is finite. Accept. */
1191 trp_route_set_selected(cur_route, 0);
1192 trp_route_set_selected(best_route, 1);
1193 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1194 trp_route_set_selected(cur_route, 0);
1195 } else if (trp_metric_is_finite(best_metric)) {
1196 trp_route_set_selected(best_route, 1);
1201 realm=NULL; n_realm=0;
1205 comm=NULL; n_comm=0;
1210 /* true if curtime >= expiry */
1211 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1213 return (tr_cmp_timespec(curtime, expiry) >= 0);
1216 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1217 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1218 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1220 struct timespec sweep_time={0,0};
1221 TRP_ROUTE **entry=NULL;
1225 /* use a single time for the entire sweep */
1226 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1227 tr_err("trps_sweep_routes: could not read realtime clock.");
1228 sweep_time.tv_sec=0;
1229 sweep_time.tv_nsec=0;
1233 entry= trp_rtable_get_entries(NULL, trps->rtable, &n_entry); /* must talloc_free *entry */
1235 /* loop over the entries */
1236 for (ii=0; ii<n_entry; ii++) {
1237 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1238 tr_debug("trps_sweep_routes: route expired.");
1239 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1241 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1242 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1245 /* set metric to infinity and reset timer */
1246 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1247 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1248 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1249 trp_route_get_interval(entry[ii]),
1250 trp_route_get_expiry(entry[ii])));
1260 /* Sweep for expired communities/realms/memberships. */
1261 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1263 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1264 struct timespec sweep_time={0,0};
1265 struct timespec tmp = {0};
1266 TR_COMM_MEMB *memb=NULL;
1267 TR_COMM_ITER *iter=NULL;
1268 TRP_RC rc=TRP_ERROR;
1270 /* use a single time for the entire sweep */
1271 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1272 tr_err("trps_sweep_ctable: could not read realtime clock.");
1273 sweep_time.tv_sec=0;
1274 sweep_time.tv_nsec=0;
1278 /* iterate all memberships */
1279 iter=tr_comm_iter_new(tmp_ctx);
1281 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1285 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1287 memb=tr_comm_memb_iter_all_next(iter)) {
1288 if (tr_comm_memb_get_origin(memb)==NULL)
1289 continue; /* do not expire local entries */
1291 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1292 if (tr_comm_memb_get_times_expired(memb)>0) {
1293 /* Already expired once; flush. */
1294 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1295 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1296 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1297 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1298 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)));
1299 tr_comm_table_remove_memb(trps->ctable, memb);
1300 tr_comm_memb_free(memb);
1302 /* This is the first expiration. Note this and reset the expiry time. */
1303 tr_comm_memb_expire(memb);
1304 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1305 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1306 timespec_to_str(tr_clock_convert(TRP_CLOCK, &sweep_time, CLOCK_REALTIME, &tmp)),
1307 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)),
1308 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1309 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1310 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1315 /* get rid of any unreferenced realms, etc */
1316 tr_comm_table_sweep(trps->ctable);
1319 talloc_free(tmp_ctx);
1324 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1326 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1327 return TRP_METRIC_INVALID;
1329 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1330 return TRP_METRIC_INFINITY;
1332 if (trp_metric_is_finite(m1+m2))
1335 return TRP_METRIC_INFINITY;
1338 /* convert an rentry into a new trp update info record */
1339 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1341 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1342 unsigned int linkcost=0;
1345 if (trp_route_is_local(route))
1348 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1349 trp_route_get_peer(route)));
1352 /* Note that we leave the next hop empty since the recipient fills that in.
1353 * This is where we add the link cost (currently always 1) to the next peer. */
1354 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1355 ||(trp_inforec_set_metric(rec,
1356 trps_metric_add(trp_route_get_metric(route),
1357 linkcost)) != TRP_SUCCESS)
1358 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1359 tr_err("trps_route_to_inforec: error creating route update.");
1367 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1369 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1370 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1371 TRP_INFOREC *rec=NULL;
1374 tr_err("trps_route_to_upd: could not create update message.");
1377 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1378 if (trp_upd_get_realm(upd)==NULL) {
1379 tr_err("trps_route_to_upd: could not copy realm.");
1380 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1383 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1384 if (trp_upd_get_comm(upd)==NULL) {
1385 tr_err("trps_route_to_upd: could not copy comm.");
1386 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1389 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1391 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1392 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1393 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1394 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1397 trp_upd_add_inforec(upd, rec);
1400 talloc_steal(mem_ctx, upd);
1403 talloc_free(tmp_ctx);
1407 /* select the correct route to comm/realm to be announced to peer */
1408 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_label)
1410 TRP_ROUTE *route = NULL;
1411 TRP_PEER *route_peer = NULL;
1412 TR_NAME *route_peer_label = NULL;
1414 /* Take the currently selected route unless it is through the peer we're sending the update to.
1415 * I.e., enforce the split horizon rule. Start by looking up the currently selected route. */
1416 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1418 /* No selected route, this should only happen if the only route has been retracted,
1419 * in which case we do not want to advertise it. */
1423 /* Check whether it's local. */
1424 if (trp_route_is_local(route)) {
1425 /* It is always ok to announce a local route */
1426 tr_debug("trps_select_realm_update: selected route for %.*s/%.*s is local",
1427 realm->len, realm->buf,
1428 comm->len, comm->buf);
1430 /* It's not local. Get the route's peer and check whether it's the same place we
1431 * got the selected route from. Peer should always correspond to an entry in our
1433 tr_debug("trps_select_realm_update: selected route for %.*s/%.*s is not local",
1434 realm->len, realm->buf,
1435 comm->len, comm->buf);
1436 route_peer = trp_ptable_find_gss_name(trps->ptable, trp_route_get_peer(route));
1437 if (route_peer == NULL) {
1438 tr_err("trps_select_realm_update: unknown peer GSS name (%.*s) for selected route for %.*s/%.*s",
1439 trp_route_get_peer(route)->len, trp_route_get_peer(route)->buf,
1440 realm->len, realm->buf,
1441 comm->len, comm->buf);
1444 route_peer_label = trp_peer_get_label(route_peer);
1445 if (route_peer_label == NULL) {
1446 tr_err("trps_select_realm_update: error retrieving peer label for selected route for %.*s/%.*s",
1447 realm->len, realm->buf,
1448 comm->len, comm->buf);
1452 /* see if these match */
1453 tr_debug("trps_select_realm_update: %.*s vs %.*s",
1454 peer_label->len, peer_label->buf,
1455 route_peer_label->len, route_peer_label->buf);
1457 if (0==tr_name_cmp(peer_label, route_peer_label)) {
1458 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1459 tr_debug("trps_select_realm_update: matched, finding alternate route");
1460 route=trps_find_best_route(trps, comm, realm, peer_label);
1461 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route)))) {
1462 tr_debug("trps_select_realm_update: no route to %.*s/%.*s suitable to advertise to %.*s",
1463 realm->len, realm->buf,
1464 comm->len, comm->buf,
1465 peer_label->len, peer_label->buf);
1466 return NULL; /* don't advertise a nonexistent or retracted route */
1473 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1474 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1476 TRPS_INSTANCE *trps,
1477 TR_NAME *peer_label,
1481 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1482 TR_NAME **realm=NULL;
1485 TRP_ROUTE *best=NULL;
1491 for (ii=0; ii<n_comm; ii++) {
1492 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1493 for (jj=0; jj<n_realm; jj++) {
1494 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_label);
1495 /* If we found a route, add it to the list. If triggered!=0, then only
1496 * add triggered routes. */
1497 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1498 upd=trps_route_to_upd(mem_ctx, trps, best);
1500 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1503 g_ptr_array_add(updates, upd);
1519 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1521 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1522 TRP_INFOREC *rec=NULL;
1528 comm=tr_comm_memb_get_comm(memb);
1529 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1533 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1538 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1543 if ((NULL!=tr_comm_get_apcs(comm)) &&
1544 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1545 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1546 (NULL==trp_inforec_get_apcs(rec)))) {
1551 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1552 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1553 (NULL==trp_inforec_get_owner_realm(rec)))) {
1558 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1559 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1560 (NULL==trp_inforec_get_owner_contact(rec)))) {
1565 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1566 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1571 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1577 talloc_steal(mem_ctx, rec);
1580 talloc_free(tmp_ctx);
1584 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1585 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx,
1586 TRPS_INSTANCE *trps,
1587 TR_NAME *peer_label,
1591 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1592 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1593 TRP_INFOREC *rec=NULL;
1594 TR_COMM_ITER *iter=NULL;
1595 TR_COMM_MEMB *memb=NULL;
1600 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1601 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1602 /* leave peer empty */
1604 iter=tr_comm_iter_new(tmp_ctx);
1606 tr_err("trps_comm_update: unable to allocate iterator.");
1611 /* now add inforecs */
1612 switch (realm->role) {
1614 memb=tr_comm_table_find_idp_memb(trps->ctable,
1615 tr_realm_get_id(realm),
1616 tr_comm_get_id(comm));
1619 memb=tr_comm_table_find_rp_memb(trps->ctable,
1620 tr_realm_get_id(realm),
1621 tr_comm_get_id(comm));
1627 for (memb=tr_comm_memb_iter_first(iter, memb);
1629 memb=tr_comm_memb_iter_next(iter)) {
1630 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1632 tr_err("trps_comm_update: unable to allocate inforec.");
1636 trp_upd_add_inforec(upd, rec);
1640 if (trp_upd_get_inforec(upd)==NULL)
1641 upd=NULL; /* no inforecs, no reason to send the update */
1643 talloc_steal(mem_ctx, upd); /* success! */
1646 talloc_free(tmp_ctx);
1650 /* Find all community updates to send to a peer and add these as TR_UPD records
1651 * to the updates GPtrArray. */
1652 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1654 TRPS_INSTANCE *trps,
1655 TR_NAME *peer_label,
1658 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1659 TR_COMM_ITER *comm_iter=NULL;
1661 TR_COMM_ITER *realm_iter=NULL;
1662 TR_REALM *realm=NULL;
1664 TRP_RC rc=TRP_ERROR;
1666 /* currently do not send any communities on triggered updates */
1672 comm_iter=tr_comm_iter_new(tmp_ctx);
1673 realm_iter=tr_comm_iter_new(tmp_ctx);
1674 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1675 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1680 /* do every community */
1681 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1683 comm=tr_comm_table_iter_next(comm_iter)) {
1684 /* do every realm in this community */
1685 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1686 tr_comm_get_id(comm)->len,
1687 tr_comm_get_id(comm)->buf);
1688 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1690 realm=tr_realm_iter_next(realm_iter)) {
1691 /* get the update for this comm/realm */
1692 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1693 tr_realm_get_id(realm)->len,
1694 tr_realm_get_id(realm)->buf);
1695 upd=trps_comm_update(mem_ctx, trps, peer_label, comm, realm);
1697 g_ptr_array_add(updates, upd);
1702 talloc_free(tmp_ctx);
1707 * Filter the inforecs in a single update
1709 * @param filt The filter to apply
1710 * @param upd The update to filter
1712 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1714 TRP_INFOREC *this=NULL, *next=NULL;
1715 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1716 TR_FILTER_TARGET *target=NULL;
1718 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1720 target= tr_filter_target_trp_inforec(NULL, upd, this);
1722 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1723 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1726 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1727 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1728 /* Either no filter matched or one matched and rejected this record.
1729 * Also filter out record if we were unable to allocate a target. */
1730 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1733 tr_filter_target_free(target);
1738 * May shuffle the update list.
1740 * @param filters The filter set for the relevant TRP peer
1741 * @param updates GPtrArray of updates to filter
1743 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1748 /* Walk backward through the array so we can remove elements. Careful about loop
1749 * termination - remember that ii is unsigned. */
1750 for (ii=updates->len; ii>0; ii--) {
1751 upd=g_ptr_array_index(updates, ii-1);
1752 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1753 /* see if we removed all the records from this update */
1754 if (trp_upd_num_inforecs(upd)==0)
1755 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1759 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1760 static void trps_trp_upd_destroy(gpointer data)
1762 trp_upd_free((TRP_UPD *)data);
1765 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1766 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1768 TRP_UPDATE_TYPE update_type,
1772 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1773 TR_MSG msg; /* not a pointer! */
1775 TRP_ROUTE *route=NULL;
1778 TRP_RC rc=TRP_ERROR;
1779 TR_NAME *peer_label=trp_peer_get_label(peer);
1780 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1782 if (updates==NULL) {
1783 tr_err("trps_update_one_peer: unable to allocate updates array.");
1788 switch (update_type) {
1789 case TRP_UPDATE_TRIGGERED:
1790 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1791 peer_label->len, peer_label->buf);
1793 case TRP_UPDATE_SCHEDULED:
1794 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1795 peer_label->len, peer_label->buf);
1797 case TRP_UPDATE_REQUESTED:
1798 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1799 peer_label->len, peer_label->buf);
1802 tr_err("trps_update_one_peer: invalid update type requested.");
1807 /* First, gather route updates. */
1808 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1809 if ((comm==NULL) && (realm==NULL)) {
1811 rc=trps_select_route_updates_for_peer(tmp_ctx,
1815 update_type==TRP_UPDATE_TRIGGERED);
1816 } else if ((comm!=NULL) && (realm!=NULL)) {
1817 /* a single community/realm was requested */
1818 route=trps_select_realm_update(trps, comm, realm, peer_label);
1820 /* we have no actual update to send back, MUST send a retraction */
1821 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1822 route=trp_route_new(tmp_ctx);
1823 trp_route_set_comm(route, tr_dup_name(comm));
1824 trp_route_set_realm(route, tr_dup_name(realm));
1825 trp_route_set_peer(route, tr_new_name(""));
1826 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1827 trp_route_set_trust_router(route, tr_new_name(""));
1828 trp_route_set_next_hop(route, tr_new_name(""));
1830 upd=trps_route_to_upd(tmp_ctx, trps, route);
1832 tr_err("trps_update_one_peer: unable to allocate route update.");
1836 g_ptr_array_add(updates, upd);
1838 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1843 /* Second, gather community updates */
1844 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1845 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1847 /* see if we have anything to send */
1848 if (updates->len<=0)
1849 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1851 /* Apply outbound TRP filters for this peer */
1852 trps_filter_outbound_updates(peer->filters, updates);
1854 if (updates->len<=0)
1855 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1857 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1858 for (ii=0; ii<updates->len; ii++) {
1859 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1860 /* now encode the update message */
1861 tr_msg_set_trp_upd(&msg, upd);
1862 encoded = tr_msg_encode(NULL, &msg);
1863 if (encoded == NULL) {
1864 tr_err("trps_update_one_peer: error encoding update.");
1869 tr_debug("trps_update_one_peer: adding message to queue.");
1870 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1871 tr_err("trps_update_one_peer: error queueing update.");
1873 tr_debug("trps_update_one_peer: update queued successfully.");
1875 tr_msg_free_encoded(encoded);
1885 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1886 talloc_free(tmp_ctx);
1890 /* all routes/communities to all peers */
1891 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1893 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1894 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1895 TRP_PEER *peer=NULL;
1896 TRP_RC rc=TRP_SUCCESS;
1898 if (trps->ptable==NULL)
1899 return TRP_SUCCESS; /* no peers, nothing to do */
1902 tr_err("trps_update: failed to allocate peer table iterator.");
1903 talloc_free(tmp_ctx);
1907 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1908 (peer!=NULL) && (rc==TRP_SUCCESS);
1909 peer=trp_ptable_iter_next(iter))
1911 if (!trps_peer_connected(trps, peer)) {
1912 TR_NAME *peer_label=trp_peer_get_label(peer);
1913 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1914 peer_label->len, peer_label->buf);
1917 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1920 tr_debug("trps_update: rc=%u after attempting update.", rc);
1921 trp_ptable_iter_free(iter);
1922 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1923 talloc_free(tmp_ctx);
1927 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1929 trp_rtable_add(trps->rtable, route); /* should return status */
1933 /* steals the peer object */
1934 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1936 if (trps->ptable==NULL) {
1937 trps->ptable=trp_ptable_new(trps);
1938 if (trps->ptable==NULL)
1941 return trp_ptable_add(trps->ptable, peer);
1944 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1946 if (trps->ptable==NULL)
1949 return trp_ptable_find_gss_name(trps->ptable, gssname);
1952 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1954 if (trps->ptable==NULL)
1957 return trp_ptable_find_servicename(trps->ptable, servicename);
1960 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1962 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1966 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1973 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1976 TR_NAME *realm=NULL;
1978 tr_debug("trps_handle_request: handling TRP request.");
1980 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1981 tr_notice("trps_handle_request: received invalid TRP request.");
1985 if (!trp_req_is_wildcard(req)) {
1986 comm=trp_req_get_comm(req);
1987 realm=trp_req_get_realm(req);
1988 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1989 comm->len, comm->buf, realm->len, realm->buf);
1991 tr_debug("trps_handle_request: all routes requested.");
1992 /* leave comm/realm NULL */
1994 return trps_update_one_peer(trps,
1995 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1996 TRP_UPDATE_REQUESTED,
2002 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
2004 TRP_RC rc=TRP_ERROR;
2006 switch (tr_msg_get_msg_type(tr_msg)) {
2008 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
2009 if (rc==TRP_SUCCESS) {
2010 rc=trps_update_active_routes(trps);
2011 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
2016 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
2020 /* unknown error or one we don't care about (e.g., TID messages) */
2025 /* send wildcard route request to a peer */
2026 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
2028 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
2029 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
2030 TR_MSG msg; /* not a pointer */
2031 TRP_REQ *req=trp_req_new(tmp_ctx);
2033 TRP_RC rc=TRP_ERROR;
2036 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
2040 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
2041 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
2046 tr_msg_set_trp_req(&msg, req);
2047 encoded= tr_msg_encode(NULL, &msg);
2048 if (encoded==NULL) {
2049 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
2054 tr_debug("trps_wildcard_route_req: adding message to queue.");
2055 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
2056 tr_err("trps_wildcard_route_req: error queueing request.");
2059 tr_debug("trps_wildcard_route_req: request queued successfully.");
2065 tr_msg_free_encoded(encoded);
2069 talloc_free(tmp_ctx);