2 * Copyright (c) 2016, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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17 * may be used to endorse or promote products derived from this software
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20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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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.");
273 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
274 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
275 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
276 trpc_mq_add(trpc, mq_msg);
279 talloc_free(tmp_ctx);
283 /* get the currently selected route if available */
284 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
286 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
289 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
291 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
292 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
295 /* copy the result if you want to keep it */
296 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
298 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
302 return trp_route_get_next_hop(route);
306 /* mark a route as retracted */
307 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
309 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
310 trp_route_set_triggered(entry, 1);
313 /* is this route retracted? */
314 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
316 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
319 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
324 TRP_PEER *peer=NULL; /* entry in the peer table */
325 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
327 tr_debug("trps_read_message: started");
328 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
329 *(trp_connection_get_gssctx(conn)),
332 tr_debug("trps_read_message: error");
338 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
339 tr_debug("trps_read_message: %.*s", buflen, buf);
341 *msg= tr_msg_decode(NULL, buf, buflen);
346 conn_peer=trp_connection_get_peer(conn);
347 if (conn_peer==NULL) {
348 tr_err("trps_read_message: connection has no peer name");
352 peer=trps_get_peer_by_gssname(trps, conn_peer);
354 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
358 /* verify we received a message we support, otherwise drop it now */
359 switch (tr_msg_get_msg_type(*msg)) {
361 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
362 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 */
363 /* update provenance if necessary */
364 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
368 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
372 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
373 tr_msg_free_decoded(*msg);
375 return TRP_UNSUPPORTED;
381 int trps_get_listener(TRPS_INSTANCE *trps,
382 TRPS_MSG_FUNC msg_handler,
383 TRP_AUTH_FUNC auth_handler,
384 const char *hostname,
393 n_fd = tr_sock_listen_all(port, fd_out, max_fd);
396 tr_err("trps_get_listener: Error opening port %d.");
398 /* opening port succeeded */
399 tr_info("trps_get_listener: Opened port %d.", port);
401 /* make the sockets non-blocking */
402 for (ii=0; ii<n_fd; ii++) {
403 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
404 tr_err("trps_get_listener: Error setting O_NONBLOCK.");
405 for (ii=0; ii<n_fd; ii++) {
416 /* store the caller's request handler & cookie */
417 trps->msg_handler = msg_handler;
418 trps->auth_handler = auth_handler;
419 trps->hostname = talloc_strdup(trps, hostname);
421 trps->cookie = cookie;
427 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
429 /* try to establish a GSS context */
430 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
431 tr_notice("trps_authorize_connection: failed to authorize connection");
432 trp_connection_close(conn);
435 tr_notice("trps_authorize_connection: authorized connection");
439 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
444 /* loop as long as the connection exists */
445 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
446 rc=trps_read_message(trps, conn, &msg);
449 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
453 trp_connection_close(conn);
457 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
461 tr_debug("trps_handle_connection: connection closed.");
464 /* TODO: check realm/comm, now part of the update instead of inforec */
465 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
468 tr_notice("trps_validate_update: null TRP update.");
472 if (trp_upd_get_realm(upd)==NULL) {
473 tr_notice("trps_validate_update: received TRP update without realm.");
477 if (trp_upd_get_comm(upd)==NULL) {
478 tr_notice("trps_validate_update: received TRP update without community.");
482 if (trp_upd_get_inforec(upd)==NULL) {
483 tr_notice("trps_validate_update: received TRP update with no info records.");
487 if (trp_upd_get_peer(upd)==NULL) {
488 tr_notice("trps_validate_update: received TRP update without origin peer information.");
496 /* ensure that the update could be accepted if feasible */
497 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
499 switch(trp_inforec_get_type(rec)) {
500 case TRP_INFOREC_TYPE_ROUTE:
501 if ((trp_inforec_get_trust_router(rec)==NULL)
502 || (trp_inforec_get_next_hop(rec)==NULL)) {
503 tr_debug("trps_validate_inforec: missing record info.");
507 /* check for valid metric */
508 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
509 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
513 /* check for valid interval */
514 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
515 tr_debug("trps_validate_inforec: invalid interval.");
520 case TRP_INFOREC_TYPE_COMMUNITY:
521 /* TODO: validate community updates */
525 tr_notice("trps_validate_inforec: unsupported record type.");
526 return TRP_UNSUPPORTED;
532 /* link cost to a peer */
533 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
538 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
540 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
542 return TRP_METRIC_INFINITY;
543 return trp_route_get_metric(entry) + trps_cost(trps, peer);
546 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
548 unsigned int rec_metric=trp_inforec_get_metric(rec);
549 unsigned int new_metric=0;
550 unsigned int current_metric=0;
551 TR_NAME *next_hop=NULL;
553 /* we check these in the validation stage, but just in case... */
554 if (trp_metric_is_invalid(rec_metric))
557 /* retractions (aka infinite metrics) are always feasible */
558 if (trp_metric_is_infinite(rec_metric))
561 /* updates from our current next hop are always feasible*/
562 next_hop=trps_get_next_hop(trps, comm, realm);
564 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
569 /* compare the existing metric we advertise to what we would advertise
570 * if we accept this update */
571 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
572 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
573 if (new_metric <= current_metric)
579 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
580 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
582 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
583 if (0!=clock_gettime(TRP_CLOCK, ts)) {
584 tr_err("trps_compute_expiry: could not read realtime clock.");
588 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
589 ts->tv_sec += small_factor*interval;
593 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
595 TRP_ROUTE *entry=NULL;
597 entry=trp_rtable_get_entry(trps->rtable,
598 trp_upd_get_comm(upd),
599 trp_upd_get_realm(upd),
600 trp_inforec_get_next_hop(rec));
602 entry=trp_route_new(NULL);
604 tr_err("trps_accept_update: unable to allocate new entry.");
608 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
609 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
610 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
611 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
612 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
613 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
614 if ((trp_route_get_comm(entry)==NULL)
615 ||(trp_route_get_realm(entry)==NULL)
616 ||(trp_route_get_peer(entry)==NULL)
617 ||(trp_route_get_trust_router(entry)==NULL)
618 ||(trp_route_get_next_hop(entry)==NULL)) {
619 /* at least one field could not be allocated */
620 tr_err("trps_accept_update: unable to allocate all fields for entry.");
621 trp_route_free(entry);
624 trp_rtable_add(trps->rtable, entry);
627 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
628 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
629 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
630 * time unset on a new route entry. */
631 tr_debug("trps_accept_update: accepting route update.");
632 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
633 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
635 /* check whether the trust router has changed */
636 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
637 trp_inforec_get_trust_router(rec))) {
638 /* The name changed. Set this route as triggered. */
639 tr_debug("trps_accept_update: trust router for route changed.");
640 trp_route_set_triggered(entry, 1);
641 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
643 if (!trps_route_retracted(trps, entry)) {
644 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
645 trp_route_set_expiry(entry, trps_compute_expiry(trps,
646 trp_route_get_interval(entry),
647 trp_route_get_expiry(entry)));
653 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
655 TRP_ROUTE *route=NULL;
658 /* determine feasibility */
659 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
660 tr_debug("trps_handle_update: record feasibility=%d", feas);
662 /* do we have an existing route? */
663 route=trps_get_route(trps,
664 trp_upd_get_comm(upd),
665 trp_upd_get_realm(upd),
666 trp_upd_get_peer(upd));
668 /* there was a route table entry already */
669 tr_debug("trps_handle_updates: route entry already exists.");
671 /* Update is feasible. Accept it. */
672 trps_accept_update(trps, upd, rec);
674 /* Update is infeasible. Ignore it unless the trust router has changed. */
675 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
676 trp_inforec_get_trust_router(rec))) {
677 /* the trust router associated with the route has changed, treat update as a retraction */
678 trps_retract_route(trps, route);
682 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
683 tr_debug("trps_handle_update: no route entry exists yet.");
684 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
685 trps_accept_update(trps, upd, rec);
691 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
694 TR_NAME *this_name=NULL;
698 return 0; /* no provenance list, so it has no names in it */
700 /* now check to see if name is in the provenance */
701 for (ii=0; ii<json_array_size(prov); ii++) {
702 s=json_string_value(json_array_get(prov, ii));
704 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
708 this_name=tr_new_name(s);
709 if (this_name==NULL) {
710 tr_debug("trps_name_in_provenance: unable to allocate name.");
713 if (0==tr_name_cmp(name, this_name)) {
714 tr_free_name(this_name);
717 tr_free_name(this_name);
722 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
724 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
725 TR_COMM *comm=tr_comm_new(tmp_ctx);
728 tr_debug("trps_create_new_comm: unable to allocate new community.");
731 /* fill in the community with info */
732 tr_comm_set_id(comm, tr_dup_name(comm_id));
733 if (tr_comm_get_id(comm)==NULL) {
734 tr_debug("trps_create_new_comm: unable to allocate community name.");
738 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
739 if (trp_inforec_get_apcs(rec)!=NULL) {
740 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
741 if (tr_comm_get_apcs(comm)==NULL) {
742 tr_debug("trps_create_new_comm: unable to allocate APC list.");
747 if (trp_inforec_get_owner_realm(rec)!=NULL) {
748 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
749 if (tr_comm_get_owner_realm(comm)==NULL) {
750 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
755 if (trp_inforec_get_owner_contact(rec)!=NULL) {
756 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
757 if (tr_comm_get_owner_contact(comm)==NULL) {
758 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
763 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
764 talloc_steal(mem_ctx, comm);
767 talloc_free(tmp_ctx);
771 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
773 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
774 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
777 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
780 /* fill in the realm */
781 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
782 if (tr_rp_realm_get_id(rp)==NULL) {
783 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
787 talloc_steal(mem_ctx, rp);
790 talloc_free(tmp_ctx);
794 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
796 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
797 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
800 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
803 /* fill in the realm */
804 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
805 if (tr_idp_realm_get_id(idp)==NULL) {
806 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
810 if (trp_inforec_get_apcs(rec)!=NULL) {
811 tr_idp_realm_set_apcs(idp, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
812 if (tr_idp_realm_get_apcs(idp)==NULL) {
813 tr_debug("trps_create_new_idp_realm: unable to allocate APC list.");
818 idp->origin=TR_REALM_DISCOVERED;
820 talloc_steal(mem_ctx, idp);
823 talloc_free(tmp_ctx);
827 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
829 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
830 TR_NAME *comm_id=trp_upd_get_comm(upd);
831 TR_NAME *realm_id=trp_upd_get_realm(upd);
832 TR_NAME *origin_id=NULL;
833 TR_NAME *our_peer_label=NULL;
835 TR_RP_REALM *rp_realm=NULL;
836 TR_IDP_REALM *idp_realm=NULL;
837 struct timespec expiry={0,0};
840 if ((comm_id==NULL) || (realm_id==NULL))
843 origin_id=trp_inforec_dup_origin(rec);
847 /* see whether we want to add this */
848 our_peer_label=trps_dup_label(trps);
849 if (our_peer_label==NULL) {
850 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
854 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
855 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
857 /* no loop occurring, accept the update */
858 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
860 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
861 comm_id->len, comm_id->buf);
862 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
864 tr_debug("trps_handle_inforec_comm: unable to create new community.");
867 tr_comm_table_add_comm(trps->ctable, comm);
869 /* TODO: see if other comm data match the new inforec and update or complain */
871 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
872 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
875 switch (trp_inforec_get_role(rec)) {
877 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
878 if (rp_realm==NULL) {
879 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
880 realm_id->len, realm_id->buf);
881 rp_realm=trps_create_new_rp_realm(tmp_ctx, realm_id, rec);
882 if (rp_realm==NULL) {
883 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
884 /* we may leave an unused community in the table, but it will only last until
885 * the next table sweep if it does not get any realms before that happens */
888 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
890 /* TODO: if realm existed, see if data match the new inforec and update or complain */
891 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
892 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
893 realm_id->len, realm_id->buf,
894 comm_id->len, comm_id->buf,
895 origin_id->len, origin_id->buf);
898 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
899 if (idp_realm==NULL) {
900 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
901 realm_id->len, realm_id->buf);
902 idp_realm=trps_create_new_idp_realm(tmp_ctx, realm_id, rec);
903 if (idp_realm==NULL) {
904 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
905 /* we may leave an unused community in the table, but it will only last until
906 * the next table sweep if it does not get any realms before that happens */
909 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
911 /* TODO: if realm existed, see if data match the new inforec and update or complain */
912 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
913 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
914 realm_id->len, realm_id->buf,
915 comm_id->len, comm_id->buf,
916 origin_id->len, origin_id->buf);
919 tr_debug("trps_handle_inforec_comm: unable to add realm.");
927 if (our_peer_label!=NULL)
928 tr_free_name(our_peer_label);
930 tr_free_name(origin_id);
931 talloc_free(tmp_ctx);
936 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
938 * @param trps Active TRPS instance
939 * @param upd TRP_UPD that contains the inforec to filter
940 * @param rec Inforec to filter
941 * @return 1 if accepted by the filter, 0 otherwise
943 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
946 TR_NAME *peer_name=NULL;
947 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
948 TR_FILTER_TARGET *target=NULL;
951 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
952 peer_name=trp_upd_get_peer(upd);
953 peer=trps_get_peer_by_gssname(trps, peer_name);
955 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
961 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
962 target= tr_filter_target_trp_inforec(NULL, upd, rec);
964 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
965 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
968 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
969 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
972 || (action!=TR_FILTER_ACTION_ACCEPT)) {
973 /* either the filter did not match or it matched a reject rule or allocating the target failed */
978 tr_filter_target_free(target);
980 /* filter matched an accept rule */
985 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
987 TRP_INFOREC *rec=NULL;
989 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
990 tr_notice("trps_handle_update: received invalid TRP update.");
994 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
995 /* validate/sanity check the record update */
996 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
997 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
1002 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1003 if (!trps_filter_inbound_inforec(trps, upd, rec)) {
1004 tr_debug("trps_handle_update: inforec rejected by filter.");
1005 continue; /* just go on to the next record */
1008 switch (trp_inforec_get_type(rec)) {
1009 case TRP_INFOREC_TYPE_ROUTE:
1010 tr_debug("trps_handle_update: handling route inforec.");
1011 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1012 tr_notice("trps_handle_update: error handling route inforec.");
1014 case TRP_INFOREC_TYPE_COMMUNITY:
1015 tr_debug("trps_handle_update: handling community inforec.");
1016 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1017 tr_notice("trps_handle_update: error handling community inforec.");
1021 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1028 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1031 tr_notice("trps_validate_request: null TRP request.");
1035 if (trp_req_get_comm(req)==NULL) {
1036 tr_notice("trps_validate_request: received TRP request with null community.");
1040 if (trp_req_get_realm(req)==NULL) {
1041 tr_notice("trps_validate_request: received TRP request with null realm.");
1045 if (trp_req_get_peer(req)==NULL) {
1046 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1053 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1054 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1057 TR_NAME *exclude_peer)
1059 TRP_ROUTE **entry=NULL;
1060 TRP_ROUTE *best=NULL;
1063 unsigned int kk_min=0;
1064 unsigned int min_metric=TRP_METRIC_INFINITY;
1066 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1067 for (kk=0; kk<n_entry; kk++) {
1068 if (trp_route_get_metric(entry[kk]) < min_metric) {
1069 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1072 min_metric=trp_route_get_metric(entry[kk]);
1076 if (trp_metric_is_finite(min_metric))
1083 /* TODO: think this through more carefully. At least ought to add hysteresis
1084 * to avoid flapping between routers or routes. */
1085 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1087 size_t n_comm=0, ii=0;
1088 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1089 size_t n_realm=0, jj=0;
1090 TR_NAME **realm=NULL;
1091 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1092 unsigned int best_metric=0, cur_metric=0;
1094 for (ii=0; ii<n_comm; ii++) {
1095 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1096 for (jj=0; jj<n_realm; jj++) {
1097 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1098 if (best_route==NULL)
1099 best_metric=TRP_METRIC_INFINITY;
1101 best_metric=trp_route_get_metric(best_route);
1103 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1104 if (cur_route!=NULL) {
1105 cur_metric=trp_route_get_metric(cur_route);
1106 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1107 /* The new route has a lower metric than the previous, and is finite. Accept. */
1108 trp_route_set_selected(cur_route, 0);
1109 trp_route_set_selected(best_route, 1);
1110 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1111 trp_route_set_selected(cur_route, 0);
1112 } else if (trp_metric_is_finite(best_metric)) {
1113 trp_route_set_selected(best_route, 1);
1118 realm=NULL; n_realm=0;
1122 comm=NULL; n_comm=0;
1127 /* true if curtime >= expiry */
1128 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1130 return (tr_cmp_timespec(curtime, expiry) >= 0);
1133 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1134 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1135 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1137 struct timespec sweep_time={0,0};
1138 TRP_ROUTE **entry=NULL;
1142 /* use a single time for the entire sweep */
1143 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1144 tr_err("trps_sweep_routes: could not read realtime clock.");
1145 sweep_time.tv_sec=0;
1146 sweep_time.tv_nsec=0;
1150 entry= trp_rtable_get_entries(NULL, trps->rtable, &n_entry); /* must talloc_free *entry */
1152 /* loop over the entries */
1153 for (ii=0; ii<n_entry; ii++) {
1154 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1155 tr_debug("trps_sweep_routes: route expired.");
1156 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1158 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1159 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1162 /* set metric to infinity and reset timer */
1163 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1164 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1165 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1166 trp_route_get_interval(entry[ii]),
1167 trp_route_get_expiry(entry[ii])));
1177 /* Sweep for expired communities/realms/memberships. */
1178 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1180 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1181 struct timespec sweep_time={0,0};
1182 struct timespec tmp = {0};
1183 TR_COMM_MEMB *memb=NULL;
1184 TR_COMM_ITER *iter=NULL;
1185 TRP_RC rc=TRP_ERROR;
1187 /* use a single time for the entire sweep */
1188 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1189 tr_err("trps_sweep_ctable: could not read realtime clock.");
1190 sweep_time.tv_sec=0;
1191 sweep_time.tv_nsec=0;
1195 /* iterate all memberships */
1196 iter=tr_comm_iter_new(tmp_ctx);
1198 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1202 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1204 memb=tr_comm_memb_iter_all_next(iter)) {
1205 if (tr_comm_memb_get_origin(memb)==NULL)
1206 continue; /* do not expire local entries */
1208 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1209 if (tr_comm_memb_get_times_expired(memb)>0) {
1210 /* Already expired once; flush. */
1211 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1212 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1213 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1214 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1215 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)));
1216 tr_comm_table_remove_memb(trps->ctable, memb);
1217 tr_comm_memb_free(memb);
1219 /* This is the first expiration. Note this and reset the expiry time. */
1220 tr_comm_memb_expire(memb);
1221 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1222 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1223 timespec_to_str(tr_clock_convert(TRP_CLOCK, &sweep_time, CLOCK_REALTIME, &tmp)),
1224 timespec_to_str(tr_comm_memb_get_expiry_realtime(memb, &tmp)),
1225 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1226 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1227 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1232 /* get rid of any unreferenced realms, etc */
1233 tr_comm_table_sweep(trps->ctable);
1236 talloc_free(tmp_ctx);
1241 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1243 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1244 return TRP_METRIC_INVALID;
1246 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1247 return TRP_METRIC_INFINITY;
1249 if (trp_metric_is_finite(m1+m2))
1252 return TRP_METRIC_INFINITY;
1255 /* convert an rentry into a new trp update info record */
1256 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1258 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1259 unsigned int linkcost=0;
1262 if (trp_route_is_local(route))
1265 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1266 trp_route_get_peer(route)));
1269 /* Note that we leave the next hop empty since the recipient fills that in.
1270 * This is where we add the link cost (currently always 1) to the next peer. */
1271 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1272 ||(trp_inforec_set_metric(rec,
1273 trps_metric_add(trp_route_get_metric(route),
1274 linkcost)) != TRP_SUCCESS)
1275 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1276 tr_err("trps_route_to_inforec: error creating route update.");
1284 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1286 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1287 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1288 TRP_INFOREC *rec=NULL;
1291 tr_err("trps_route_to_upd: could not create update message.");
1294 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1295 if (trp_upd_get_realm(upd)==NULL) {
1296 tr_err("trps_route_to_upd: could not copy realm.");
1297 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1300 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1301 if (trp_upd_get_comm(upd)==NULL) {
1302 tr_err("trps_route_to_upd: could not copy comm.");
1303 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1306 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1308 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1309 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1310 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1311 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1314 trp_upd_add_inforec(upd, rec);
1317 talloc_steal(mem_ctx, upd);
1320 talloc_free(tmp_ctx);
1324 /* select the correct route to comm/realm to be announced to peer */
1325 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1329 /* Take the currently selected route unless it is through the peer we're sending the update to.
1330 * I.e., enforce the split horizon rule. */
1331 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1333 /* No selected route, this should only happen if the only route has been retracted,
1334 * in which case we do not want to advertise it. */
1337 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1338 trp_route_get_peer(route)->buf);
1339 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1340 tr_debug("trps_select_realm_update: matched, finding alternate route");
1341 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1342 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1343 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1344 return NULL; /* don't advertise a nonexistent or retracted route */
1349 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1350 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1352 TRPS_INSTANCE *trps,
1353 TR_NAME *peer_gssname,
1357 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1358 TR_NAME **realm=NULL;
1361 TRP_ROUTE *best=NULL;
1367 for (ii=0; ii<n_comm; ii++) {
1368 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1369 for (jj=0; jj<n_realm; jj++) {
1370 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1371 /* If we found a route, add it to the list. If triggered!=0, then only
1372 * add triggered routes. */
1373 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1374 upd=trps_route_to_upd(mem_ctx, trps, best);
1376 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1379 g_ptr_array_add(updates, upd);
1395 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1397 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1398 TRP_INFOREC *rec=NULL;
1404 comm=tr_comm_memb_get_comm(memb);
1405 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1409 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1414 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1419 if ((NULL!=tr_comm_get_apcs(comm)) &&
1420 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1421 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1422 (NULL==trp_inforec_get_apcs(rec)))) {
1427 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1428 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1429 (NULL==trp_inforec_get_owner_realm(rec)))) {
1434 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1435 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1436 (NULL==trp_inforec_get_owner_contact(rec)))) {
1441 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1442 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1447 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1453 talloc_steal(mem_ctx, rec);
1456 talloc_free(tmp_ctx);
1460 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1461 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1463 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1464 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1465 TRP_INFOREC *rec=NULL;
1466 TR_COMM_ITER *iter=NULL;
1467 TR_COMM_MEMB *memb=NULL;
1472 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1473 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1474 /* leave peer empty */
1476 iter=tr_comm_iter_new(tmp_ctx);
1478 tr_err("trps_comm_update: unable to allocate iterator.");
1483 /* now add inforecs */
1484 switch (realm->role) {
1486 memb=tr_comm_table_find_idp_memb(trps->ctable,
1487 tr_realm_get_id(realm),
1488 tr_comm_get_id(comm));
1491 memb=tr_comm_table_find_rp_memb(trps->ctable,
1492 tr_realm_get_id(realm),
1493 tr_comm_get_id(comm));
1499 for (memb=tr_comm_memb_iter_first(iter, memb);
1501 memb=tr_comm_memb_iter_next(iter)) {
1502 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1504 tr_err("trps_comm_update: unable to allocate inforec.");
1508 trp_upd_add_inforec(upd, rec);
1512 if (trp_upd_get_inforec(upd)==NULL)
1513 upd=NULL; /* no inforecs, no reason to send the update */
1515 talloc_steal(mem_ctx, upd); /* success! */
1518 talloc_free(tmp_ctx);
1522 /* Find all community updates to send to a peer and add these as TR_UPD records
1523 * to the updates GPtrArray. */
1524 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1526 TRPS_INSTANCE *trps,
1527 TR_NAME *peer_gssname,
1530 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1531 TR_COMM_ITER *comm_iter=NULL;
1533 TR_COMM_ITER *realm_iter=NULL;
1534 TR_REALM *realm=NULL;
1536 TRP_RC rc=TRP_ERROR;
1538 /* currently do not send any communities on triggered updates */
1544 comm_iter=tr_comm_iter_new(tmp_ctx);
1545 realm_iter=tr_comm_iter_new(tmp_ctx);
1546 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1547 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1552 /* do every community */
1553 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1555 comm=tr_comm_table_iter_next(comm_iter)) {
1556 /* do every realm in this community */
1557 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1558 tr_comm_get_id(comm)->len,
1559 tr_comm_get_id(comm)->buf);
1560 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1562 realm=tr_realm_iter_next(realm_iter)) {
1563 /* get the update for this comm/realm */
1564 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1565 tr_realm_get_id(realm)->len,
1566 tr_realm_get_id(realm)->buf);
1567 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1569 g_ptr_array_add(updates, upd);
1574 talloc_free(tmp_ctx);
1579 * Filter the inforecs in a single update
1581 * @param filt The filter to apply
1582 * @param upd The update to filter
1584 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1586 TRP_INFOREC *this=NULL, *next=NULL;
1587 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1588 TR_FILTER_TARGET *target=NULL;
1590 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1592 target= tr_filter_target_trp_inforec(NULL, upd, this);
1594 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1595 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1598 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1599 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1600 /* Either no filter matched or one matched and rejected this record.
1601 * Also filter out record if we were unable to allocate a target. */
1602 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1605 tr_filter_target_free(target);
1610 * May shuffle the update list.
1612 * @param filters The filter set for the relevant TRP peer
1613 * @param updates GPtrArray of updates to filter
1615 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1620 /* Walk backward through the array so we can remove elements. Careful about loop
1621 * termination - remember that ii is unsigned. */
1622 for (ii=updates->len; ii>0; ii--) {
1623 upd=g_ptr_array_index(updates, ii-1);
1624 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1625 /* see if we removed all the records from this update */
1626 if (trp_upd_num_inforecs(upd)==0)
1627 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1631 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1632 static void trps_trp_upd_destroy(gpointer data)
1634 trp_upd_free((TRP_UPD *)data);
1637 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1638 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1640 TRP_UPDATE_TYPE update_type,
1644 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1645 TR_MSG msg; /* not a pointer! */
1647 TRP_ROUTE *route=NULL;
1650 TRP_RC rc=TRP_ERROR;
1651 TR_NAME *peer_label=trp_peer_get_label(peer);
1652 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1654 if (updates==NULL) {
1655 tr_err("trps_update_one_peer: unable to allocate updates array.");
1660 switch (update_type) {
1661 case TRP_UPDATE_TRIGGERED:
1662 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1663 peer_label->len, peer_label->buf);
1665 case TRP_UPDATE_SCHEDULED:
1666 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1667 peer_label->len, peer_label->buf);
1669 case TRP_UPDATE_REQUESTED:
1670 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1671 peer_label->len, peer_label->buf);
1674 tr_err("trps_update_one_peer: invalid update type requested.");
1679 /* First, gather route updates. */
1680 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1681 if ((comm==NULL) && (realm==NULL)) {
1683 rc=trps_select_route_updates_for_peer(tmp_ctx,
1687 update_type==TRP_UPDATE_TRIGGERED);
1688 } else if ((comm!=NULL) && (realm!=NULL)) {
1689 /* a single community/realm was requested */
1690 route=trps_select_realm_update(trps, comm, realm, peer_label);
1692 /* we have no actual update to send back, MUST send a retraction */
1693 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1694 route=trp_route_new(tmp_ctx);
1695 trp_route_set_comm(route, tr_dup_name(comm));
1696 trp_route_set_realm(route, tr_dup_name(realm));
1697 trp_route_set_peer(route, tr_new_name(""));
1698 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1699 trp_route_set_trust_router(route, tr_new_name(""));
1700 trp_route_set_next_hop(route, tr_new_name(""));
1702 upd=trps_route_to_upd(tmp_ctx, trps, route);
1704 tr_err("trps_update_one_peer: unable to allocate route update.");
1708 g_ptr_array_add(updates, upd);
1710 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1715 /* Second, gather community updates */
1716 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1717 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1719 /* see if we have anything to send */
1720 if (updates->len<=0)
1721 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1723 /* Apply outbound TRP filters for this peer */
1724 trps_filter_outbound_updates(peer->filters, updates);
1726 if (updates->len<=0)
1727 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1729 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1730 for (ii=0; ii<updates->len; ii++) {
1731 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1732 /* now encode the update message */
1733 tr_msg_set_trp_upd(&msg, upd);
1734 encoded = tr_msg_encode(NULL, &msg);
1735 if (encoded == NULL) {
1736 tr_err("trps_update_one_peer: error encoding update.");
1741 tr_debug("trps_update_one_peer: adding message to queue.");
1742 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1743 tr_err("trps_update_one_peer: error queueing update.");
1745 tr_debug("trps_update_one_peer: update queued successfully.");
1747 tr_msg_free_encoded(encoded);
1757 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1758 talloc_free(tmp_ctx);
1762 /* all routes/communities to all peers */
1763 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1765 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1766 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1767 TRP_PEER *peer=NULL;
1768 TRP_RC rc=TRP_SUCCESS;
1770 if (trps->ptable==NULL)
1771 return TRP_SUCCESS; /* no peers, nothing to do */
1774 tr_err("trps_update: failed to allocate peer table iterator.");
1775 talloc_free(tmp_ctx);
1779 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1780 (peer!=NULL) && (rc==TRP_SUCCESS);
1781 peer=trp_ptable_iter_next(iter))
1783 if (!trps_peer_connected(trps, peer)) {
1784 TR_NAME *peer_label=trp_peer_get_label(peer);
1785 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1786 peer_label->len, peer_label->buf);
1789 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1792 tr_debug("trps_update: rc=%u after attempting update.", rc);
1793 trp_ptable_iter_free(iter);
1794 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1795 talloc_free(tmp_ctx);
1799 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1801 trp_rtable_add(trps->rtable, route); /* should return status */
1805 /* steals the peer object */
1806 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1808 if (trps->ptable==NULL) {
1809 trps->ptable=trp_ptable_new(trps);
1810 if (trps->ptable==NULL)
1813 return trp_ptable_add(trps->ptable, peer);
1816 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1818 if (trps->ptable==NULL)
1821 return trp_ptable_find_gss_name(trps->ptable, gssname);
1824 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1826 if (trps->ptable==NULL)
1829 return trp_ptable_find_servicename(trps->ptable, servicename);
1832 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1834 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1838 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1845 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1848 TR_NAME *realm=NULL;
1850 tr_debug("trps_handle_request: handling TRP request.");
1852 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1853 tr_notice("trps_handle_request: received invalid TRP request.");
1857 if (!trp_req_is_wildcard(req)) {
1858 comm=trp_req_get_comm(req);
1859 realm=trp_req_get_realm(req);
1860 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1861 comm->len, comm->buf, realm->len, realm->buf);
1863 tr_debug("trps_handle_request: all routes requested.");
1864 /* leave comm/realm NULL */
1866 return trps_update_one_peer(trps,
1867 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1868 TRP_UPDATE_REQUESTED,
1874 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1876 TRP_RC rc=TRP_ERROR;
1878 switch (tr_msg_get_msg_type(tr_msg)) {
1880 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1881 if (rc==TRP_SUCCESS) {
1882 rc=trps_update_active_routes(trps);
1883 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1888 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1892 /* unknown error or one we don't care about (e.g., TID messages) */
1897 /* send wildcard route request to a peer */
1898 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1900 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1901 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1902 TR_MSG msg; /* not a pointer */
1903 TRP_REQ *req=trp_req_new(tmp_ctx);
1905 TRP_RC rc=TRP_ERROR;
1908 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1912 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1913 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1918 tr_msg_set_trp_req(&msg, req);
1919 encoded= tr_msg_encode(NULL, &msg);
1920 if (encoded==NULL) {
1921 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1926 tr_debug("trps_wildcard_route_req: adding message to queue.");
1927 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1928 tr_err("trps_wildcard_route_req: error queueing request.");
1931 tr_debug("trps_wildcard_route_req: request queued successfully.");
1937 tr_msg_free_encoded(encoded);
1941 talloc_free(tmp_ctx);