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 /* instead, let's let that happen and then clear the queue when an attempt to
271 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
272 } else if (trpc->shutting_down) {
273 tr_debug("trps_send_msg: skipping message because TRP client is shutting down.");
274 rc = TRP_SUCCESS; /* it's ok that this didn't get sent, the connection will be gone in a moment */
276 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
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)
1123 TRP_ROUTE **entry=NULL;
1124 TRP_ROUTE *best=NULL;
1127 unsigned int kk_min=0;
1128 unsigned int min_metric=TRP_METRIC_INFINITY;
1130 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1131 for (kk=0; kk<n_entry; kk++) {
1132 if (trp_route_get_metric(entry[kk]) < min_metric) {
1133 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1136 min_metric=trp_route_get_metric(entry[kk]);
1140 if (trp_metric_is_finite(min_metric))
1147 /* TODO: think this through more carefully. At least ought to add hysteresis
1148 * to avoid flapping between routers or routes. */
1149 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1151 size_t n_comm=0, ii=0;
1152 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1153 size_t n_realm=0, jj=0;
1154 TR_NAME **realm=NULL;
1155 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1156 unsigned int best_metric=0, cur_metric=0;
1158 for (ii=0; ii<n_comm; ii++) {
1159 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1160 for (jj=0; jj<n_realm; jj++) {
1161 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1162 if (best_route==NULL)
1163 best_metric=TRP_METRIC_INFINITY;
1165 best_metric=trp_route_get_metric(best_route);
1167 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1168 if (cur_route!=NULL) {
1169 cur_metric=trp_route_get_metric(cur_route);
1170 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1171 /* The new route has a lower metric than the previous, and is finite. Accept. */
1172 trp_route_set_selected(cur_route, 0);
1173 trp_route_set_selected(best_route, 1);
1174 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1175 trp_route_set_selected(cur_route, 0);
1176 } else if (trp_metric_is_finite(best_metric)) {
1177 trp_route_set_selected(best_route, 1);
1182 realm=NULL; n_realm=0;
1186 comm=NULL; n_comm=0;
1191 /* true if curtime >= expiry */
1192 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1194 return (tr_cmp_timespec(curtime, expiry) >= 0);
1197 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1198 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1199 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1201 struct timespec sweep_time={0,0};
1202 TRP_ROUTE **entry=NULL;
1206 /* use a single time for the entire sweep */
1207 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1208 tr_err("trps_sweep_routes: could not read realtime clock.");
1209 sweep_time.tv_sec=0;
1210 sweep_time.tv_nsec=0;
1214 entry= trp_rtable_get_entries(NULL, trps->rtable, &n_entry); /* must talloc_free *entry */
1216 /* loop over the entries */
1217 for (ii=0; ii<n_entry; ii++) {
1218 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1219 tr_debug("trps_sweep_routes: route expired.");
1220 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1222 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1223 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1226 /* set metric to infinity and reset timer */
1227 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1228 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1229 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1230 trp_route_get_interval(entry[ii]),
1231 trp_route_get_expiry(entry[ii])));
1241 /* Sweep for expired communities/realms/memberships. */
1242 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1244 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1245 struct timespec sweep_time={0,0};
1246 struct timespec tmp = {0};
1247 TR_COMM_MEMB *memb=NULL;
1248 TR_COMM_ITER *iter=NULL;
1249 TRP_RC rc=TRP_ERROR;
1251 /* use a single time for the entire sweep */
1252 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1253 tr_err("trps_sweep_ctable: could not read realtime clock.");
1254 sweep_time.tv_sec=0;
1255 sweep_time.tv_nsec=0;
1259 /* iterate all memberships */
1260 iter=tr_comm_iter_new(tmp_ctx);
1262 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1266 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1268 memb=tr_comm_memb_iter_all_next(iter)) {
1269 if (tr_comm_memb_get_origin(memb)==NULL)
1270 continue; /* do not expire local entries */
1272 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1273 if (tr_comm_memb_get_times_expired(memb)>0) {
1274 /* Already expired once; flush. */
1275 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1276 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1277 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1278 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1279 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)));
1280 tr_comm_table_remove_memb(trps->ctable, memb);
1281 tr_comm_memb_free(memb);
1283 /* This is the first expiration. Note this and reset the expiry time. */
1284 tr_comm_memb_expire(memb);
1285 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1286 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1287 timespec_to_str(tr_clock_convert(TRP_CLOCK, &sweep_time, CLOCK_REALTIME, &tmp)),
1288 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)),
1289 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1290 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1291 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1296 /* get rid of any unreferenced realms, etc */
1297 tr_comm_table_sweep(trps->ctable);
1300 talloc_free(tmp_ctx);
1305 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1307 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1308 return TRP_METRIC_INVALID;
1310 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1311 return TRP_METRIC_INFINITY;
1313 if (trp_metric_is_finite(m1+m2))
1316 return TRP_METRIC_INFINITY;
1319 /* convert an rentry into a new trp update info record */
1320 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1322 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1323 unsigned int linkcost=0;
1326 if (trp_route_is_local(route))
1329 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1330 trp_route_get_peer(route)));
1333 /* Note that we leave the next hop empty since the recipient fills that in.
1334 * This is where we add the link cost (currently always 1) to the next peer. */
1335 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1336 ||(trp_inforec_set_metric(rec,
1337 trps_metric_add(trp_route_get_metric(route),
1338 linkcost)) != TRP_SUCCESS)
1339 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1340 tr_err("trps_route_to_inforec: error creating route update.");
1348 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1350 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1351 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1352 TRP_INFOREC *rec=NULL;
1355 tr_err("trps_route_to_upd: could not create update message.");
1358 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1359 if (trp_upd_get_realm(upd)==NULL) {
1360 tr_err("trps_route_to_upd: could not copy realm.");
1361 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1364 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1365 if (trp_upd_get_comm(upd)==NULL) {
1366 tr_err("trps_route_to_upd: could not copy comm.");
1367 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1370 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1372 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1373 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1374 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1375 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1378 trp_upd_add_inforec(upd, rec);
1381 talloc_steal(mem_ctx, upd);
1384 talloc_free(tmp_ctx);
1388 /* select the correct route to comm/realm to be announced to peer */
1389 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1393 /* Take the currently selected route unless it is through the peer we're sending the update to.
1394 * I.e., enforce the split horizon rule. */
1395 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1397 /* No selected route, this should only happen if the only route has been retracted,
1398 * in which case we do not want to advertise it. */
1401 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1402 trp_route_get_peer(route)->buf);
1403 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1404 tr_debug("trps_select_realm_update: matched, finding alternate route");
1405 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1406 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1407 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1408 return NULL; /* don't advertise a nonexistent or retracted route */
1413 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1414 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1416 TRPS_INSTANCE *trps,
1417 TR_NAME *peer_gssname,
1421 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1422 TR_NAME **realm=NULL;
1425 TRP_ROUTE *best=NULL;
1431 for (ii=0; ii<n_comm; ii++) {
1432 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1433 for (jj=0; jj<n_realm; jj++) {
1434 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1435 /* If we found a route, add it to the list. If triggered!=0, then only
1436 * add triggered routes. */
1437 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1438 upd=trps_route_to_upd(mem_ctx, trps, best);
1440 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1443 g_ptr_array_add(updates, upd);
1459 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1461 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1462 TRP_INFOREC *rec=NULL;
1468 comm=tr_comm_memb_get_comm(memb);
1469 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1473 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1478 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1483 if ((NULL!=tr_comm_get_apcs(comm)) &&
1484 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1485 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1486 (NULL==trp_inforec_get_apcs(rec)))) {
1491 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1492 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1493 (NULL==trp_inforec_get_owner_realm(rec)))) {
1498 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1499 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1500 (NULL==trp_inforec_get_owner_contact(rec)))) {
1505 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1506 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1511 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1517 talloc_steal(mem_ctx, rec);
1520 talloc_free(tmp_ctx);
1524 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1525 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1527 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1528 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1529 TRP_INFOREC *rec=NULL;
1530 TR_COMM_ITER *iter=NULL;
1531 TR_COMM_MEMB *memb=NULL;
1536 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1537 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1538 /* leave peer empty */
1540 iter=tr_comm_iter_new(tmp_ctx);
1542 tr_err("trps_comm_update: unable to allocate iterator.");
1547 /* now add inforecs */
1548 switch (realm->role) {
1550 memb=tr_comm_table_find_idp_memb(trps->ctable,
1551 tr_realm_get_id(realm),
1552 tr_comm_get_id(comm));
1555 memb=tr_comm_table_find_rp_memb(trps->ctable,
1556 tr_realm_get_id(realm),
1557 tr_comm_get_id(comm));
1563 for (memb=tr_comm_memb_iter_first(iter, memb);
1565 memb=tr_comm_memb_iter_next(iter)) {
1566 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1568 tr_err("trps_comm_update: unable to allocate inforec.");
1572 trp_upd_add_inforec(upd, rec);
1576 if (trp_upd_get_inforec(upd)==NULL)
1577 upd=NULL; /* no inforecs, no reason to send the update */
1579 talloc_steal(mem_ctx, upd); /* success! */
1582 talloc_free(tmp_ctx);
1586 /* Find all community updates to send to a peer and add these as TR_UPD records
1587 * to the updates GPtrArray. */
1588 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1590 TRPS_INSTANCE *trps,
1591 TR_NAME *peer_gssname,
1594 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1595 TR_COMM_ITER *comm_iter=NULL;
1597 TR_COMM_ITER *realm_iter=NULL;
1598 TR_REALM *realm=NULL;
1600 TRP_RC rc=TRP_ERROR;
1602 /* currently do not send any communities on triggered updates */
1608 comm_iter=tr_comm_iter_new(tmp_ctx);
1609 realm_iter=tr_comm_iter_new(tmp_ctx);
1610 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1611 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1616 /* do every community */
1617 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1619 comm=tr_comm_table_iter_next(comm_iter)) {
1620 /* do every realm in this community */
1621 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1622 tr_comm_get_id(comm)->len,
1623 tr_comm_get_id(comm)->buf);
1624 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1626 realm=tr_realm_iter_next(realm_iter)) {
1627 /* get the update for this comm/realm */
1628 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1629 tr_realm_get_id(realm)->len,
1630 tr_realm_get_id(realm)->buf);
1631 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1633 g_ptr_array_add(updates, upd);
1638 talloc_free(tmp_ctx);
1643 * Filter the inforecs in a single update
1645 * @param filt The filter to apply
1646 * @param upd The update to filter
1648 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1650 TRP_INFOREC *this=NULL, *next=NULL;
1651 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1652 TR_FILTER_TARGET *target=NULL;
1654 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1656 target= tr_filter_target_trp_inforec(NULL, upd, this);
1658 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1659 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1662 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1663 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1664 /* Either no filter matched or one matched and rejected this record.
1665 * Also filter out record if we were unable to allocate a target. */
1666 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1669 tr_filter_target_free(target);
1674 * May shuffle the update list.
1676 * @param filters The filter set for the relevant TRP peer
1677 * @param updates GPtrArray of updates to filter
1679 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1684 /* Walk backward through the array so we can remove elements. Careful about loop
1685 * termination - remember that ii is unsigned. */
1686 for (ii=updates->len; ii>0; ii--) {
1687 upd=g_ptr_array_index(updates, ii-1);
1688 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1689 /* see if we removed all the records from this update */
1690 if (trp_upd_num_inforecs(upd)==0)
1691 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1695 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1696 static void trps_trp_upd_destroy(gpointer data)
1698 trp_upd_free((TRP_UPD *)data);
1701 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1702 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1704 TRP_UPDATE_TYPE update_type,
1708 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1709 TR_MSG msg; /* not a pointer! */
1711 TRP_ROUTE *route=NULL;
1714 TRP_RC rc=TRP_ERROR;
1715 TR_NAME *peer_label=trp_peer_get_label(peer);
1716 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1718 if (updates==NULL) {
1719 tr_err("trps_update_one_peer: unable to allocate updates array.");
1724 switch (update_type) {
1725 case TRP_UPDATE_TRIGGERED:
1726 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1727 peer_label->len, peer_label->buf);
1729 case TRP_UPDATE_SCHEDULED:
1730 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1731 peer_label->len, peer_label->buf);
1733 case TRP_UPDATE_REQUESTED:
1734 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1735 peer_label->len, peer_label->buf);
1738 tr_err("trps_update_one_peer: invalid update type requested.");
1743 /* First, gather route updates. */
1744 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1745 if ((comm==NULL) && (realm==NULL)) {
1747 rc=trps_select_route_updates_for_peer(tmp_ctx,
1751 update_type==TRP_UPDATE_TRIGGERED);
1752 } else if ((comm!=NULL) && (realm!=NULL)) {
1753 /* a single community/realm was requested */
1754 route=trps_select_realm_update(trps, comm, realm, peer_label);
1756 /* we have no actual update to send back, MUST send a retraction */
1757 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1758 route=trp_route_new(tmp_ctx);
1759 trp_route_set_comm(route, tr_dup_name(comm));
1760 trp_route_set_realm(route, tr_dup_name(realm));
1761 trp_route_set_peer(route, tr_new_name(""));
1762 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1763 trp_route_set_trust_router(route, tr_new_name(""));
1764 trp_route_set_next_hop(route, tr_new_name(""));
1766 upd=trps_route_to_upd(tmp_ctx, trps, route);
1768 tr_err("trps_update_one_peer: unable to allocate route update.");
1772 g_ptr_array_add(updates, upd);
1774 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1779 /* Second, gather community updates */
1780 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1781 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1783 /* see if we have anything to send */
1784 if (updates->len<=0)
1785 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1787 /* Apply outbound TRP filters for this peer */
1788 trps_filter_outbound_updates(peer->filters, updates);
1790 if (updates->len<=0)
1791 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1793 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1794 for (ii=0; ii<updates->len; ii++) {
1795 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1796 /* now encode the update message */
1797 tr_msg_set_trp_upd(&msg, upd);
1798 encoded = tr_msg_encode(NULL, &msg);
1799 if (encoded == NULL) {
1800 tr_err("trps_update_one_peer: error encoding update.");
1805 tr_debug("trps_update_one_peer: adding message to queue.");
1806 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1807 tr_err("trps_update_one_peer: error queueing update.");
1809 tr_debug("trps_update_one_peer: update queued successfully.");
1811 tr_msg_free_encoded(encoded);
1821 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1822 talloc_free(tmp_ctx);
1826 /* all routes/communities to all peers */
1827 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1829 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1830 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1831 TRP_PEER *peer=NULL;
1832 TRP_RC rc=TRP_SUCCESS;
1834 if (trps->ptable==NULL)
1835 return TRP_SUCCESS; /* no peers, nothing to do */
1838 tr_err("trps_update: failed to allocate peer table iterator.");
1839 talloc_free(tmp_ctx);
1843 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1844 (peer!=NULL) && (rc==TRP_SUCCESS);
1845 peer=trp_ptable_iter_next(iter))
1847 if (!trps_peer_connected(trps, peer)) {
1848 TR_NAME *peer_label=trp_peer_get_label(peer);
1849 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1850 peer_label->len, peer_label->buf);
1853 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1856 tr_debug("trps_update: rc=%u after attempting update.", rc);
1857 trp_ptable_iter_free(iter);
1858 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1859 talloc_free(tmp_ctx);
1863 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1865 trp_rtable_add(trps->rtable, route); /* should return status */
1869 /* steals the peer object */
1870 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1872 if (trps->ptable==NULL) {
1873 trps->ptable=trp_ptable_new(trps);
1874 if (trps->ptable==NULL)
1877 return trp_ptable_add(trps->ptable, peer);
1880 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1882 if (trps->ptable==NULL)
1885 return trp_ptable_find_gss_name(trps->ptable, gssname);
1888 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1890 if (trps->ptable==NULL)
1893 return trp_ptable_find_servicename(trps->ptable, servicename);
1896 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1898 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1902 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1909 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1912 TR_NAME *realm=NULL;
1914 tr_debug("trps_handle_request: handling TRP request.");
1916 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1917 tr_notice("trps_handle_request: received invalid TRP request.");
1921 if (!trp_req_is_wildcard(req)) {
1922 comm=trp_req_get_comm(req);
1923 realm=trp_req_get_realm(req);
1924 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1925 comm->len, comm->buf, realm->len, realm->buf);
1927 tr_debug("trps_handle_request: all routes requested.");
1928 /* leave comm/realm NULL */
1930 return trps_update_one_peer(trps,
1931 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1932 TRP_UPDATE_REQUESTED,
1938 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1940 TRP_RC rc=TRP_ERROR;
1942 switch (tr_msg_get_msg_type(tr_msg)) {
1944 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1945 if (rc==TRP_SUCCESS) {
1946 rc=trps_update_active_routes(trps);
1947 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1952 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1956 /* unknown error or one we don't care about (e.g., TID messages) */
1961 /* send wildcard route request to a peer */
1962 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1964 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1965 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1966 TR_MSG msg; /* not a pointer */
1967 TRP_REQ *req=trp_req_new(tmp_ctx);
1969 TRP_RC rc=TRP_ERROR;
1972 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1976 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1977 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1982 tr_msg_set_trp_req(&msg, req);
1983 encoded= tr_msg_encode(NULL, &msg);
1984 if (encoded==NULL) {
1985 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1990 tr_debug("trps_wildcard_route_req: adding message to queue.");
1991 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1992 tr_err("trps_wildcard_route_req: error queueing request.");
1995 tr_debug("trps_wildcard_route_req: request queued successfully.");
2001 tr_msg_free_encoded(encoded);
2005 talloc_free(tmp_ctx);