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
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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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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>
52 #include <trp_ptable.h>
53 #include <trp_rtable.h>
56 #include <tr_socket.h>
58 static int trps_destructor(void *object)
60 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
61 if (trps->rtable!=NULL)
62 trp_rtable_free(trps->rtable);
66 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
68 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
75 trps->update_interval=(struct timeval){0,0};
76 trps->sweep_interval=(struct timeval){0,0};
79 trps->mq=tr_mq_new(trps);
81 /* failed to allocate mq */
87 if (trps_init_rtable(trps) != TRP_SUCCESS) {
88 /* failed to allocate rtable */
93 talloc_set_destructor((void *)trps, trps_destructor);
98 /* create a new route table, first discarding an old one if necessary */
99 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
101 if (trps->rtable != NULL) {
102 trp_rtable_free(trps->rtable);
106 trps->rtable=trp_rtable_new();
107 if (trps->rtable==NULL) {
113 void trps_clear_rtable(TRPS_INSTANCE *trps)
115 trp_rtable_clear(trps->rtable);
118 void trps_free (TRPS_INSTANCE *trps)
124 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
126 return tr_mq_pop(trps->mq, 0);
129 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
131 tr_mq_add(trps->mq, msg);
134 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
136 return trps->connect_interval.tv_sec;
139 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
141 trps->connect_interval.tv_sec=interval;
142 trps->connect_interval.tv_usec=0;
145 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
147 return trps->update_interval.tv_sec;
150 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
152 trps->update_interval.tv_sec=interval;
153 trps->update_interval.tv_usec=0;
156 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
158 return trps->sweep_interval.tv_sec;
161 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
163 trps->sweep_interval.tv_sec=interval;
164 trps->sweep_interval.tv_usec=0;
167 void trps_set_ctable(TRPS_INSTANCE *trps, TR_COMM_TABLE *comm)
172 void trps_set_ptable(TRPS_INSTANCE *trps, TRP_PTABLE *ptable)
174 if (trps->ptable!=NULL)
175 trp_ptable_free(trps->ptable);
179 void trps_set_peer_status_callback(TRPS_INSTANCE *trps, void (*cb)(TRP_PEER *, void *), void *cookie)
181 TRP_PTABLE_ITER *iter=NULL;
183 if (trps->ptable==NULL)
186 iter=trp_ptable_iter_new(NULL);
187 for (peer=trp_ptable_iter_first(iter, trps->ptable); peer!=NULL; peer=trp_ptable_iter_next(iter))
188 trp_peer_set_conn_status_cb(peer, cb, cookie);
189 trp_ptable_iter_free(iter);
192 /* Get the label peers will know us by - needs to match trp_peer_get_label() output.
193 * There is no get, only dup, because we don't store the label except when requested. */
194 TR_NAME *trps_dup_label(TRPS_INSTANCE *trps)
196 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
198 char *s=talloc_asprintf(tmp_ctx, "%s:%u", trps->hostname, trps->port);
201 label=tr_new_name(s);
204 talloc_free(tmp_ctx);
208 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
210 TRPC_INSTANCE *cur=NULL;
212 TR_NAME *peer_servicename=trp_peer_get_servicename(peer);
214 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
215 name=trpc_get_gssname(cur);
216 if ((name!=NULL) && (0==tr_name_cmp(peer_servicename, name))) {
223 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
225 if (trps->conn==NULL)
228 trp_connection_append(trps->conn, new);
230 talloc_steal(trps, new);
233 /* ok to call more than once; guarantees connection no longer in the list.
234 * Caller is responsible for freeing the removed element afterwards. */
235 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
237 trps->conn=trp_connection_remove(trps->conn, remove);
240 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
242 if (trps->trpc==NULL)
245 trpc_append(trps->trpc, trpc);
247 talloc_steal(trps, trpc);
250 /* ok to call more than once; guarantees trpc no longer in the list.
251 * Caller is responsible for freeing the removed element afterwards. */
252 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
254 trps->trpc=trpc_remove(trps->trpc, remove);
257 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
259 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
260 TR_MQ_MSG *mq_msg=NULL;
263 TRPC_INSTANCE *trpc=NULL;
265 /* get the connection for this peer */
266 trpc=trps_find_trpc(trps, peer);
267 /* instead, let's let that happen and then clear the queue when an attempt to
270 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
272 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
273 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
274 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
275 trpc_mq_add(trpc, mq_msg);
278 talloc_free(tmp_ctx);
282 /* get the currently selected route if available */
283 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
285 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
288 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
290 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
291 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
294 /* copy the result if you want to keep it */
295 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
297 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
301 return trp_route_get_next_hop(route);
305 /* mark a route as retracted */
306 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
308 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
309 trp_route_set_triggered(entry, 1);
312 /* is this route retracted? */
313 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
315 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
318 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
323 TRP_PEER *peer=NULL; /* entry in the peer table */
324 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
326 tr_debug("trps_read_message: started");
327 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
328 *(trp_connection_get_gssctx(conn)),
331 tr_debug("trps_read_message: error");
337 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
338 tr_debug("trps_read_message: %.*s", buflen, buf);
340 *msg= tr_msg_decode(NULL, buf, buflen);
345 conn_peer=trp_connection_get_peer(conn);
346 if (conn_peer==NULL) {
347 tr_err("trps_read_message: connection has no peer name");
351 peer=trps_get_peer_by_gssname(trps, conn_peer);
353 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
357 /* verify we received a message we support, otherwise drop it now */
358 switch (tr_msg_get_msg_type(*msg)) {
360 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
361 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 */
362 /* update provenance if necessary */
363 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
367 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
371 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
372 tr_msg_free_decoded(*msg);
374 return TRP_UNSUPPORTED;
380 int trps_get_listener(TRPS_INSTANCE *trps,
381 TRPS_MSG_FUNC msg_handler,
382 TRP_AUTH_FUNC auth_handler,
383 const char *hostname,
392 n_fd = tr_sock_listen_all(port, fd_out, max_fd);
395 tr_err("trps_get_listener: Error opening port %d.");
397 /* opening port succeeded */
398 tr_info("trps_get_listener: Opened port %d.", port);
400 /* make the sockets non-blocking */
401 for (ii=0; ii<n_fd; ii++) {
402 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
403 tr_err("trps_get_listener: Error setting O_NONBLOCK.");
404 for (ii=0; ii<n_fd; ii++) {
415 /* store the caller's request handler & cookie */
416 trps->msg_handler = msg_handler;
417 trps->auth_handler = auth_handler;
418 trps->hostname = talloc_strdup(trps, hostname);
420 trps->cookie = cookie;
426 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
428 /* try to establish a GSS context */
429 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
430 tr_notice("trps_authorize_connection: failed to authorize connection");
431 trp_connection_close(conn);
434 tr_notice("trps_authorize_connection: authorized connection");
438 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
443 /* loop as long as the connection exists */
444 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
445 rc=trps_read_message(trps, conn, &msg);
448 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
452 trp_connection_close(conn);
456 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
460 tr_debug("trps_handle_connection: connection closed.");
463 /* TODO: check realm/comm, now part of the update instead of inforec */
464 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
467 tr_notice("trps_validate_update: null TRP update.");
471 if (trp_upd_get_realm(upd)==NULL) {
472 tr_notice("trps_validate_update: received TRP update without realm.");
476 if (trp_upd_get_comm(upd)==NULL) {
477 tr_notice("trps_validate_update: received TRP update without community.");
481 if (trp_upd_get_inforec(upd)==NULL) {
482 tr_notice("trps_validate_update: received TRP update with no info records.");
486 if (trp_upd_get_peer(upd)==NULL) {
487 tr_notice("trps_validate_update: received TRP update without origin peer information.");
495 /* ensure that the update could be accepted if feasible */
496 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
498 switch(trp_inforec_get_type(rec)) {
499 case TRP_INFOREC_TYPE_ROUTE:
500 if ((trp_inforec_get_trust_router(rec)==NULL)
501 || (trp_inforec_get_next_hop(rec)==NULL)) {
502 tr_debug("trps_validate_inforec: missing record info.");
506 /* check for valid metric */
507 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
508 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
512 /* check for valid interval */
513 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
514 tr_debug("trps_validate_inforec: invalid interval.");
519 case TRP_INFOREC_TYPE_COMMUNITY:
520 /* TODO: validate community updates */
524 tr_notice("trps_validate_inforec: unsupported record type.");
525 return TRP_UNSUPPORTED;
531 /* link cost to a peer */
532 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
537 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
539 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
541 return TRP_METRIC_INFINITY;
542 return trp_route_get_metric(entry) + trps_cost(trps, peer);
545 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
547 unsigned int rec_metric=trp_inforec_get_metric(rec);
548 unsigned int new_metric=0;
549 unsigned int current_metric=0;
550 TR_NAME *next_hop=NULL;
552 /* we check these in the validation stage, but just in case... */
553 if (trp_metric_is_invalid(rec_metric))
556 /* retractions (aka infinite metrics) are always feasible */
557 if (trp_metric_is_infinite(rec_metric))
560 /* updates from our current next hop are always feasible*/
561 next_hop=trps_get_next_hop(trps, comm, realm);
563 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
568 /* compare the existing metric we advertise to what we would advertise
569 * if we accept this update */
570 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
571 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
572 if (new_metric <= current_metric)
578 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
579 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
581 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
582 if (0!=clock_gettime(TRP_CLOCK, ts)) {
583 tr_err("trps_compute_expiry: could not read realtime clock.");
587 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
588 ts->tv_sec += small_factor*interval;
592 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
594 TRP_ROUTE *entry=NULL;
596 entry=trp_rtable_get_entry(trps->rtable,
597 trp_upd_get_comm(upd),
598 trp_upd_get_realm(upd),
599 trp_inforec_get_next_hop(rec));
601 entry=trp_route_new(NULL);
603 tr_err("trps_accept_update: unable to allocate new entry.");
607 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
608 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
609 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
610 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
611 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
612 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
613 if ((trp_route_get_comm(entry)==NULL)
614 ||(trp_route_get_realm(entry)==NULL)
615 ||(trp_route_get_peer(entry)==NULL)
616 ||(trp_route_get_trust_router(entry)==NULL)
617 ||(trp_route_get_next_hop(entry)==NULL)) {
618 /* at least one field could not be allocated */
619 tr_err("trps_accept_update: unable to allocate all fields for entry.");
620 trp_route_free(entry);
623 trp_rtable_add(trps->rtable, entry);
626 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
627 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
628 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
629 * time unset on a new route entry. */
630 tr_debug("trps_accept_update: accepting route update.");
631 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
632 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
634 /* check whether the trust router has changed */
635 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
636 trp_inforec_get_trust_router(rec))) {
637 /* The name changed. Set this route as triggered. */
638 tr_debug("trps_accept_update: trust router for route changed.");
639 trp_route_set_triggered(entry, 1);
640 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
642 if (!trps_route_retracted(trps, entry)) {
643 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
644 trp_route_set_expiry(entry, trps_compute_expiry(trps,
645 trp_route_get_interval(entry),
646 trp_route_get_expiry(entry)));
652 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
654 TRP_ROUTE *route=NULL;
657 /* determine feasibility */
658 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
659 tr_debug("trps_handle_update: record feasibility=%d", feas);
661 /* do we have an existing route? */
662 route=trps_get_route(trps,
663 trp_upd_get_comm(upd),
664 trp_upd_get_realm(upd),
665 trp_upd_get_peer(upd));
667 /* there was a route table entry already */
668 tr_debug("trps_handle_updates: route entry already exists.");
670 /* Update is feasible. Accept it. */
671 trps_accept_update(trps, upd, rec);
673 /* Update is infeasible. Ignore it unless the trust router has changed. */
674 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
675 trp_inforec_get_trust_router(rec))) {
676 /* the trust router associated with the route has changed, treat update as a retraction */
677 trps_retract_route(trps, route);
681 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
682 tr_debug("trps_handle_update: no route entry exists yet.");
683 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
684 trps_accept_update(trps, upd, rec);
690 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
693 TR_NAME *this_name=NULL;
697 return 0; /* no provenance list, so it has no names in it */
699 /* now check to see if name is in the provenance */
700 for (ii=0; ii<json_array_size(prov); ii++) {
701 s=json_string_value(json_array_get(prov, ii));
703 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
707 this_name=tr_new_name(s);
708 if (this_name==NULL) {
709 tr_debug("trps_name_in_provenance: unable to allocate name.");
712 if (0==tr_name_cmp(name, this_name)) {
713 tr_free_name(this_name);
716 tr_free_name(this_name);
721 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
723 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
724 TR_COMM *comm=tr_comm_new(tmp_ctx);
727 tr_debug("trps_create_new_comm: unable to allocate new community.");
730 /* fill in the community with info */
731 tr_comm_set_id(comm, tr_dup_name(comm_id));
732 if (tr_comm_get_id(comm)==NULL) {
733 tr_debug("trps_create_new_comm: unable to allocate community name.");
737 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
738 if (trp_inforec_get_apcs(rec)!=NULL) {
739 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
740 if (tr_comm_get_apcs(comm)==NULL) {
741 tr_debug("trps_create_new_comm: unable to allocate APC list.");
746 if (trp_inforec_get_owner_realm(rec)!=NULL) {
747 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
748 if (tr_comm_get_owner_realm(comm)==NULL) {
749 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
754 if (trp_inforec_get_owner_contact(rec)!=NULL) {
755 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
756 if (tr_comm_get_owner_contact(comm)==NULL) {
757 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
762 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
763 talloc_steal(mem_ctx, comm);
766 talloc_free(tmp_ctx);
770 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
772 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
773 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
776 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
779 /* fill in the realm */
780 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
781 if (tr_rp_realm_get_id(rp)==NULL) {
782 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
786 talloc_steal(mem_ctx, rp);
789 talloc_free(tmp_ctx);
793 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
795 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
796 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
799 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
802 /* fill in the realm */
803 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
804 if (tr_idp_realm_get_id(idp)==NULL) {
805 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
809 if (trp_inforec_get_apcs(rec)!=NULL) {
810 tr_idp_realm_set_apcs(idp, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
811 if (tr_idp_realm_get_apcs(idp)==NULL) {
812 tr_debug("trps_create_new_idp_realm: unable to allocate APC list.");
817 idp->origin=TR_REALM_DISCOVERED;
819 talloc_steal(mem_ctx, idp);
822 talloc_free(tmp_ctx);
826 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
828 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
829 TR_NAME *comm_id=trp_upd_get_comm(upd);
830 TR_NAME *realm_id=trp_upd_get_realm(upd);
831 TR_NAME *origin_id=NULL;
832 TR_NAME *our_peer_label=NULL;
834 TR_RP_REALM *rp_realm=NULL;
835 TR_IDP_REALM *idp_realm=NULL;
836 struct timespec expiry={0,0};
839 if ((comm_id==NULL) || (realm_id==NULL))
842 origin_id=trp_inforec_dup_origin(rec);
846 /* see whether we want to add this */
847 our_peer_label=trps_dup_label(trps);
848 if (our_peer_label==NULL) {
849 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
853 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
854 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
856 /* no loop occurring, accept the update */
857 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
859 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
860 comm_id->len, comm_id->buf);
861 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
863 tr_debug("trps_handle_inforec_comm: unable to create new community.");
866 tr_comm_table_add_comm(trps->ctable, comm);
868 /* TODO: see if other comm data match the new inforec and update or complain */
870 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
871 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
874 switch (trp_inforec_get_role(rec)) {
876 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
877 if (rp_realm==NULL) {
878 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
879 realm_id->len, realm_id->buf);
880 rp_realm=trps_create_new_rp_realm(tmp_ctx, realm_id, rec);
881 if (rp_realm==NULL) {
882 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
883 /* we may leave an unused community in the table, but it will only last until
884 * the next table sweep if it does not get any realms before that happens */
887 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
889 /* TODO: if realm existed, see if data match the new inforec and update or complain */
890 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
891 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
892 realm_id->len, realm_id->buf,
893 comm_id->len, comm_id->buf,
894 origin_id->len, origin_id->buf);
897 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
898 if (idp_realm==NULL) {
899 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
900 realm_id->len, realm_id->buf);
901 idp_realm=trps_create_new_idp_realm(tmp_ctx, realm_id, rec);
902 if (idp_realm==NULL) {
903 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
904 /* we may leave an unused community in the table, but it will only last until
905 * the next table sweep if it does not get any realms before that happens */
908 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
910 /* TODO: if realm existed, see if data match the new inforec and update or complain */
911 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
912 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
913 realm_id->len, realm_id->buf,
914 comm_id->len, comm_id->buf,
915 origin_id->len, origin_id->buf);
918 tr_debug("trps_handle_inforec_comm: unable to add realm.");
926 if (our_peer_label!=NULL)
927 tr_free_name(our_peer_label);
929 tr_free_name(origin_id);
930 talloc_free(tmp_ctx);
935 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
937 * @param trps Active TRPS instance
938 * @param upd TRP_UPD that contains the inforec to filter
939 * @param rec Inforec to filter
940 * @return 1 if accepted by the filter, 0 otherwise
942 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
945 TR_NAME *peer_name=NULL;
946 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
947 TR_FILTER_TARGET *target=NULL;
950 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
951 peer_name=trp_upd_get_peer(upd);
952 peer=trps_get_peer_by_gssname(trps, peer_name);
954 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
960 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
961 target= tr_filter_target_trp_inforec(NULL, upd, rec);
963 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
964 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
967 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
968 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
971 || (action!=TR_FILTER_ACTION_ACCEPT)) {
972 /* either the filter did not match or it matched a reject rule or allocating the target failed */
977 tr_filter_target_free(target);
979 /* filter matched an accept rule */
984 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
986 TRP_INFOREC *rec=NULL;
988 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
989 tr_notice("trps_handle_update: received invalid TRP update.");
993 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
994 /* validate/sanity check the record update */
995 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
996 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
1001 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1002 if (!trps_filter_inbound_inforec(trps, upd, rec)) {
1003 tr_debug("trps_handle_update: inforec rejected by filter.");
1004 continue; /* just go on to the next record */
1007 switch (trp_inforec_get_type(rec)) {
1008 case TRP_INFOREC_TYPE_ROUTE:
1009 tr_debug("trps_handle_update: handling route inforec.");
1010 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1011 tr_notice("trps_handle_update: error handling route inforec.");
1013 case TRP_INFOREC_TYPE_COMMUNITY:
1014 tr_debug("trps_handle_update: handling community inforec.");
1015 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1016 tr_notice("trps_handle_update: error handling community inforec.");
1020 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1027 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1030 tr_notice("trps_validate_request: null TRP request.");
1034 if (trp_req_get_comm(req)==NULL) {
1035 tr_notice("trps_validate_request: received TRP request with null community.");
1039 if (trp_req_get_realm(req)==NULL) {
1040 tr_notice("trps_validate_request: received TRP request with null realm.");
1044 if (trp_req_get_peer(req)==NULL) {
1045 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1052 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1053 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1056 TR_NAME *exclude_peer)
1058 TRP_ROUTE **entry=NULL;
1059 TRP_ROUTE *best=NULL;
1062 unsigned int kk_min=0;
1063 unsigned int min_metric=TRP_METRIC_INFINITY;
1065 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1066 for (kk=0; kk<n_entry; kk++) {
1067 if (trp_route_get_metric(entry[kk]) < min_metric) {
1068 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1071 min_metric=trp_route_get_metric(entry[kk]);
1075 if (trp_metric_is_finite(min_metric))
1082 /* TODO: think this through more carefully. At least ought to add hysteresis
1083 * to avoid flapping between routers or routes. */
1084 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1086 size_t n_comm=0, ii=0;
1087 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1088 size_t n_realm=0, jj=0;
1089 TR_NAME **realm=NULL;
1090 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1091 unsigned int best_metric=0, cur_metric=0;
1093 for (ii=0; ii<n_comm; ii++) {
1094 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1095 for (jj=0; jj<n_realm; jj++) {
1096 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1097 if (best_route==NULL)
1098 best_metric=TRP_METRIC_INFINITY;
1100 best_metric=trp_route_get_metric(best_route);
1102 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1103 if (cur_route!=NULL) {
1104 cur_metric=trp_route_get_metric(cur_route);
1105 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1106 /* The new route has a lower metric than the previous, and is finite. Accept. */
1107 trp_route_set_selected(cur_route, 0);
1108 trp_route_set_selected(best_route, 1);
1109 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1110 trp_route_set_selected(cur_route, 0);
1111 } else if (trp_metric_is_finite(best_metric)) {
1112 trp_route_set_selected(best_route, 1);
1117 realm=NULL; n_realm=0;
1121 comm=NULL; n_comm=0;
1126 /* true if curtime >= expiry */
1127 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1129 return (tr_cmp_timespec(curtime, expiry) >= 0);
1132 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1133 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1134 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1136 struct timespec sweep_time={0,0};
1137 TRP_ROUTE **entry=NULL;
1141 /* use a single time for the entire sweep */
1142 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1143 tr_err("trps_sweep_routes: could not read realtime clock.");
1144 sweep_time.tv_sec=0;
1145 sweep_time.tv_nsec=0;
1149 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
1151 /* loop over the entries */
1152 for (ii=0; ii<n_entry; ii++) {
1153 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1154 tr_debug("trps_sweep_routes: route expired.");
1155 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1157 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1158 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1161 /* set metric to infinity and reset timer */
1162 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1163 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1164 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1165 trp_route_get_interval(entry[ii]),
1166 trp_route_get_expiry(entry[ii])));
1176 /* Sweep for expired communities/realms/memberships. */
1177 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1179 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1180 struct timespec sweep_time={0,0};
1181 TR_COMM_MEMB *memb=NULL;
1182 TR_COMM_ITER *iter=NULL;
1183 TRP_RC rc=TRP_ERROR;
1185 /* use a single time for the entire sweep */
1186 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1187 tr_err("trps_sweep_ctable: could not read realtime clock.");
1188 sweep_time.tv_sec=0;
1189 sweep_time.tv_nsec=0;
1193 /* iterate all memberships */
1194 iter=tr_comm_iter_new(tmp_ctx);
1196 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1200 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1202 memb=tr_comm_memb_iter_all_next(iter)) {
1203 if (tr_comm_memb_get_origin(memb)==NULL)
1204 continue; /* do not expire local entries */
1206 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1207 if (tr_comm_memb_get_times_expired(memb)>0) {
1208 /* Already expired once; flush. */
1209 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1210 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1211 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1212 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1213 timespec_to_str(tr_comm_memb_get_expiry(memb)));
1214 tr_comm_table_remove_memb(trps->ctable, memb);
1215 tr_comm_memb_free(memb);
1217 /* This is the first expiration. Note this and reset the expiry time. */
1218 tr_comm_memb_expire(memb);
1219 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1220 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1221 timespec_to_str(&sweep_time),
1222 timespec_to_str(tr_comm_memb_get_expiry(memb)),
1223 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1224 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1225 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1230 /* get rid of any unreferenced realms, etc */
1231 tr_comm_table_sweep(trps->ctable);
1234 talloc_free(tmp_ctx);
1239 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1241 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1242 return TRP_METRIC_INVALID;
1244 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1245 return TRP_METRIC_INFINITY;
1247 if (trp_metric_is_finite(m1+m2))
1250 return TRP_METRIC_INFINITY;
1253 /* convert an rentry into a new trp update info record */
1254 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1256 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1257 unsigned int linkcost=0;
1260 if (trp_route_is_local(route))
1263 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1264 trp_route_get_peer(route)));
1267 /* Note that we leave the next hop empty since the recipient fills that in.
1268 * This is where we add the link cost (currently always 1) to the next peer. */
1269 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1270 ||(trp_inforec_set_metric(rec,
1271 trps_metric_add(trp_route_get_metric(route),
1272 linkcost)) != TRP_SUCCESS)
1273 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1274 tr_err("trps_route_to_inforec: error creating route update.");
1282 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1284 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1285 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1286 TRP_INFOREC *rec=NULL;
1289 tr_err("trps_route_to_upd: could not create update message.");
1292 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1293 if (trp_upd_get_realm(upd)==NULL) {
1294 tr_err("trps_route_to_upd: could not copy realm.");
1295 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1298 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1299 if (trp_upd_get_comm(upd)==NULL) {
1300 tr_err("trps_route_to_upd: could not copy comm.");
1301 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1304 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1306 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1307 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1308 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1309 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1312 trp_upd_add_inforec(upd, rec);
1315 talloc_steal(mem_ctx, upd);
1318 talloc_free(tmp_ctx);
1322 /* select the correct route to comm/realm to be announced to peer */
1323 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1327 /* Take the currently selected route unless it is through the peer we're sending the update to.
1328 * I.e., enforce the split horizon rule. */
1329 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1331 /* No selected route, this should only happen if the only route has been retracted,
1332 * in which case we do not want to advertise it. */
1335 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1336 trp_route_get_peer(route)->buf);
1337 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1338 tr_debug("trps_select_realm_update: matched, finding alternate route");
1339 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1340 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1341 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1342 return NULL; /* don't advertise a nonexistent or retracted route */
1347 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1348 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1350 TRPS_INSTANCE *trps,
1351 TR_NAME *peer_gssname,
1355 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1356 TR_NAME **realm=NULL;
1359 TRP_ROUTE *best=NULL;
1365 for (ii=0; ii<n_comm; ii++) {
1366 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1367 for (jj=0; jj<n_realm; jj++) {
1368 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1369 /* If we found a route, add it to the list. If triggered!=0, then only
1370 * add triggered routes. */
1371 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1372 upd=trps_route_to_upd(mem_ctx, trps, best);
1374 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1377 g_ptr_array_add(updates, upd);
1393 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1395 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1396 TRP_INFOREC *rec=NULL;
1402 comm=tr_comm_memb_get_comm(memb);
1403 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1407 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1412 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1417 if ((NULL!=tr_comm_get_apcs(comm)) &&
1418 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1419 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1420 (NULL==trp_inforec_get_apcs(rec)))) {
1425 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1426 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1427 (NULL==trp_inforec_get_owner_realm(rec)))) {
1432 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1433 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1434 (NULL==trp_inforec_get_owner_contact(rec)))) {
1439 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1440 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1445 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1451 talloc_steal(mem_ctx, rec);
1454 talloc_free(tmp_ctx);
1458 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1459 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1461 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1462 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1463 TRP_INFOREC *rec=NULL;
1464 TR_COMM_ITER *iter=NULL;
1465 TR_COMM_MEMB *memb=NULL;
1470 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1471 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1472 /* leave peer empty */
1474 iter=tr_comm_iter_new(tmp_ctx);
1476 tr_err("trps_comm_update: unable to allocate iterator.");
1481 /* now add inforecs */
1482 switch (realm->role) {
1484 memb=tr_comm_table_find_idp_memb(trps->ctable,
1485 tr_realm_get_id(realm),
1486 tr_comm_get_id(comm));
1489 memb=tr_comm_table_find_rp_memb(trps->ctable,
1490 tr_realm_get_id(realm),
1491 tr_comm_get_id(comm));
1497 for (memb=tr_comm_memb_iter_first(iter, memb);
1499 memb=tr_comm_memb_iter_next(iter)) {
1500 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1502 tr_err("trps_comm_update: unable to allocate inforec.");
1506 trp_upd_add_inforec(upd, rec);
1510 if (trp_upd_get_inforec(upd)==NULL)
1511 upd=NULL; /* no inforecs, no reason to send the update */
1513 talloc_steal(mem_ctx, upd); /* success! */
1516 talloc_free(tmp_ctx);
1520 /* Find all community updates to send to a peer and add these as TR_UPD records
1521 * to the updates GPtrArray. */
1522 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1524 TRPS_INSTANCE *trps,
1525 TR_NAME *peer_gssname,
1528 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1529 TR_COMM_ITER *comm_iter=NULL;
1531 TR_COMM_ITER *realm_iter=NULL;
1532 TR_REALM *realm=NULL;
1534 TRP_RC rc=TRP_ERROR;
1536 /* currently do not send any communities on triggered updates */
1542 comm_iter=tr_comm_iter_new(tmp_ctx);
1543 realm_iter=tr_comm_iter_new(tmp_ctx);
1544 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1545 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1550 /* do every community */
1551 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1553 comm=tr_comm_table_iter_next(comm_iter)) {
1554 /* do every realm in this community */
1555 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1556 tr_comm_get_id(comm)->len,
1557 tr_comm_get_id(comm)->buf);
1558 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1560 realm=tr_realm_iter_next(realm_iter)) {
1561 /* get the update for this comm/realm */
1562 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1563 tr_realm_get_id(realm)->len,
1564 tr_realm_get_id(realm)->buf);
1565 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1567 g_ptr_array_add(updates, upd);
1572 talloc_free(tmp_ctx);
1577 * Filter the inforecs in a single update
1579 * @param filt The filter to apply
1580 * @param upd The update to filter
1582 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1584 TRP_INFOREC *this=NULL, *next=NULL;
1585 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1586 TR_FILTER_TARGET *target=NULL;
1588 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1590 target= tr_filter_target_trp_inforec(NULL, upd, this);
1592 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1593 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1596 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1597 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1598 /* Either no filter matched or one matched and rejected this record.
1599 * Also filter out record if we were unable to allocate a target. */
1600 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1603 tr_filter_target_free(target);
1608 * May shuffle the update list.
1610 * @param filters The filter set for the relevant TRP peer
1611 * @param updates GPtrArray of updates to filter
1613 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1618 /* Walk backward through the array so we can remove elements. Careful about loop
1619 * termination - remember that ii is unsigned. */
1620 for (ii=updates->len; ii>0; ii--) {
1621 upd=g_ptr_array_index(updates, ii-1);
1622 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1623 /* see if we removed all the records from this update */
1624 if (trp_upd_num_inforecs(upd)==0)
1625 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1629 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1630 static void trps_trp_upd_destroy(gpointer data)
1632 trp_upd_free((TRP_UPD *)data);
1635 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1636 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1638 TRP_UPDATE_TYPE update_type,
1642 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1643 TR_MSG msg; /* not a pointer! */
1645 TRP_ROUTE *route=NULL;
1648 TRP_RC rc=TRP_ERROR;
1649 TR_NAME *peer_label=trp_peer_get_label(peer);
1650 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1652 if (updates==NULL) {
1653 tr_err("trps_update_one_peer: unable to allocate updates array.");
1658 switch (update_type) {
1659 case TRP_UPDATE_TRIGGERED:
1660 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1661 peer_label->len, peer_label->buf);
1663 case TRP_UPDATE_SCHEDULED:
1664 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1665 peer_label->len, peer_label->buf);
1667 case TRP_UPDATE_REQUESTED:
1668 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1669 peer_label->len, peer_label->buf);
1672 tr_err("trps_update_one_peer: invalid update type requested.");
1677 /* First, gather route updates. */
1678 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1679 if ((comm==NULL) && (realm==NULL)) {
1681 rc=trps_select_route_updates_for_peer(tmp_ctx,
1685 update_type==TRP_UPDATE_TRIGGERED);
1686 } else if ((comm!=NULL) && (realm!=NULL)) {
1687 /* a single community/realm was requested */
1688 route=trps_select_realm_update(trps, comm, realm, peer_label);
1690 /* we have no actual update to send back, MUST send a retraction */
1691 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1692 route=trp_route_new(tmp_ctx);
1693 trp_route_set_comm(route, tr_dup_name(comm));
1694 trp_route_set_realm(route, tr_dup_name(realm));
1695 trp_route_set_peer(route, tr_new_name(""));
1696 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1697 trp_route_set_trust_router(route, tr_new_name(""));
1698 trp_route_set_next_hop(route, tr_new_name(""));
1700 upd=trps_route_to_upd(tmp_ctx, trps, route);
1702 tr_err("trps_update_one_peer: unable to allocate route update.");
1706 g_ptr_array_add(updates, upd);
1708 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1713 /* Second, gather community updates */
1714 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1715 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1717 /* see if we have anything to send */
1718 if (updates->len<=0)
1719 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1721 /* Apply outbound TRP filters for this peer */
1722 trps_filter_outbound_updates(peer->filters, updates);
1724 if (updates->len<=0)
1725 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1727 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1728 for (ii=0; ii<updates->len; ii++) {
1729 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1730 /* now encode the update message */
1731 tr_msg_set_trp_upd(&msg, upd);
1732 encoded = tr_msg_encode(NULL, &msg);
1733 if (encoded == NULL) {
1734 tr_err("trps_update_one_peer: error encoding update.");
1739 tr_debug("trps_update_one_peer: adding message to queue.");
1740 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1741 tr_err("trps_update_one_peer: error queueing update.");
1743 tr_debug("trps_update_one_peer: update queued successfully.");
1745 tr_msg_free_encoded(encoded);
1755 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1756 talloc_free(tmp_ctx);
1760 /* all routes/communities to all peers */
1761 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1763 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1764 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1765 TRP_PEER *peer=NULL;
1766 TRP_RC rc=TRP_SUCCESS;
1768 if (trps->ptable==NULL)
1769 return TRP_SUCCESS; /* no peers, nothing to do */
1772 tr_err("trps_update: failed to allocate peer table iterator.");
1773 talloc_free(tmp_ctx);
1777 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1778 (peer!=NULL) && (rc==TRP_SUCCESS);
1779 peer=trp_ptable_iter_next(iter))
1781 if (!trps_peer_connected(trps, peer)) {
1782 TR_NAME *peer_label=trp_peer_get_label(peer);
1783 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1784 peer_label->len, peer_label->buf);
1787 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1790 tr_debug("trps_update: rc=%u after attempting update.", rc);
1791 trp_ptable_iter_free(iter);
1792 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1793 talloc_free(tmp_ctx);
1797 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1799 trp_rtable_add(trps->rtable, route); /* should return status */
1803 /* steals the peer object */
1804 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1806 if (trps->ptable==NULL) {
1807 trps->ptable=trp_ptable_new(trps);
1808 if (trps->ptable==NULL)
1811 return trp_ptable_add(trps->ptable, peer);
1814 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1816 if (trps->ptable==NULL)
1819 return trp_ptable_find_gss_name(trps->ptable, gssname);
1822 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1824 if (trps->ptable==NULL)
1827 return trp_ptable_find_servicename(trps->ptable, servicename);
1830 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1832 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1836 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1843 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1846 TR_NAME *realm=NULL;
1848 tr_debug("trps_handle_request: handling TRP request.");
1850 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1851 tr_notice("trps_handle_request: received invalid TRP request.");
1855 if (!trp_req_is_wildcard(req)) {
1856 comm=trp_req_get_comm(req);
1857 realm=trp_req_get_realm(req);
1858 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1859 comm->len, comm->buf, realm->len, realm->buf);
1861 tr_debug("trps_handle_request: all routes requested.");
1862 /* leave comm/realm NULL */
1864 return trps_update_one_peer(trps,
1865 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1866 TRP_UPDATE_REQUESTED,
1872 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1874 TRP_RC rc=TRP_ERROR;
1876 switch (tr_msg_get_msg_type(tr_msg)) {
1878 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1879 if (rc==TRP_SUCCESS) {
1880 rc=trps_update_active_routes(trps);
1881 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1886 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1890 /* unknown error or one we don't care about (e.g., TID messages) */
1895 /* send wildcard route request to a peer */
1896 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1898 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1899 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1900 TR_MSG msg; /* not a pointer */
1901 TRP_REQ *req=trp_req_new(tmp_ctx);
1903 TRP_RC rc=TRP_ERROR;
1906 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1910 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1911 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1916 tr_msg_set_trp_req(&msg, req);
1917 encoded= tr_msg_encode(NULL, &msg);
1918 if (encoded==NULL) {
1919 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1924 tr_debug("trps_wildcard_route_req: adding message to queue.");
1925 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1926 tr_err("trps_wildcard_route_req: error queueing request.");
1929 tr_debug("trps_wildcard_route_req: request queued successfully.");
1935 tr_msg_free_encoded(encoded);
1939 talloc_free(tmp_ctx);