2 * Copyright (c) 2016, JANET(UK)
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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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47 #include <tr_name_internal.h>
48 #include <trp_internal.h>
50 #include <trp_ptable.h>
51 #include <trp_rtable.h>
54 #include <tr_socket.h>
56 static int trps_destructor(void *object)
58 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
59 if (trps->rtable!=NULL)
60 trp_rtable_free(trps->rtable);
64 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
66 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
73 trps->update_interval=(struct timeval){0,0};
74 trps->sweep_interval=(struct timeval){0,0};
77 trps->mq=tr_mq_new(trps);
79 /* failed to allocate mq */
85 if (trps_init_rtable(trps) != TRP_SUCCESS) {
86 /* failed to allocate rtable */
91 talloc_set_destructor((void *)trps, trps_destructor);
96 /* create a new route table, first discarding an old one if necessary */
97 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
99 if (trps->rtable != NULL) {
100 trp_rtable_free(trps->rtable);
104 trps->rtable=trp_rtable_new();
105 if (trps->rtable==NULL) {
111 void trps_clear_rtable(TRPS_INSTANCE *trps)
113 trp_rtable_clear(trps->rtable);
116 void trps_free (TRPS_INSTANCE *trps)
122 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
124 return tr_mq_pop(trps->mq, 0);
127 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
129 tr_mq_add(trps->mq, msg);
132 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
134 return trps->connect_interval.tv_sec;
137 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
139 trps->connect_interval.tv_sec=interval;
140 trps->connect_interval.tv_usec=0;
143 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
145 return trps->update_interval.tv_sec;
148 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
150 trps->update_interval.tv_sec=interval;
151 trps->update_interval.tv_usec=0;
154 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
156 return trps->sweep_interval.tv_sec;
159 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
161 trps->sweep_interval.tv_sec=interval;
162 trps->sweep_interval.tv_usec=0;
165 void trps_set_ctable(TRPS_INSTANCE *trps, TR_COMM_TABLE *comm)
170 void trps_set_ptable(TRPS_INSTANCE *trps, TRP_PTABLE *ptable)
172 if (trps->ptable!=NULL)
173 trp_ptable_free(trps->ptable);
177 void trps_set_peer_status_callback(TRPS_INSTANCE *trps, void (*cb)(TRP_PEER *, void *), void *cookie)
179 TRP_PTABLE_ITER *iter=NULL;
181 if (trps->ptable==NULL)
184 iter=trp_ptable_iter_new(NULL);
185 for (peer=trp_ptable_iter_first(iter, trps->ptable); peer!=NULL; peer=trp_ptable_iter_next(iter))
186 trp_peer_set_conn_status_cb(peer, cb, cookie);
187 trp_ptable_iter_free(iter);
190 /* Get the label peers will know us by - needs to match trp_peer_get_label() output.
191 * There is no get, only dup, because we don't store the label except when requested. */
192 TR_NAME *trps_dup_label(TRPS_INSTANCE *trps)
194 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
196 char *s=talloc_asprintf(tmp_ctx, "%s:%u", trps->hostname, trps->port);
199 label=tr_new_name(s);
202 talloc_free(tmp_ctx);
206 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
208 TRPC_INSTANCE *cur=NULL;
210 TR_NAME *peer_servicename=trp_peer_get_servicename(peer);
212 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
213 name=trpc_get_gssname(cur);
214 if ((name!=NULL) && (0==tr_name_cmp(peer_servicename, name))) {
221 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
223 if (trps->conn==NULL)
226 trp_connection_append(trps->conn, new);
228 talloc_steal(trps, new);
231 /* ok to call more than once; guarantees connection no longer in the list.
232 * Caller is responsible for freeing the removed element afterwards. */
233 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
235 trps->conn=trp_connection_remove(trps->conn, remove);
238 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
240 if (trps->trpc==NULL)
243 trpc_append(trps->trpc, trpc);
245 talloc_steal(trps, trpc);
248 /* ok to call more than once; guarantees trpc no longer in the list.
249 * Caller is responsible for freeing the removed element afterwards. */
250 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
252 trps->trpc=trpc_remove(trps->trpc, remove);
255 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
257 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
258 TR_MQ_MSG *mq_msg=NULL;
261 TRPC_INSTANCE *trpc=NULL;
263 /* get the connection for this peer */
264 trpc=trps_find_trpc(trps, peer);
265 /* instead, let's let that happen and then clear the queue when an attempt to
268 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
270 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
271 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
272 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
273 trpc_mq_add(trpc, mq_msg);
276 talloc_free(tmp_ctx);
280 /* get the currently selected route if available */
281 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
283 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
286 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
288 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
289 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
292 /* copy the result if you want to keep it */
293 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
295 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
299 return trp_route_get_next_hop(route);
303 /* mark a route as retracted */
304 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
306 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
307 trp_route_set_triggered(entry, 1);
310 /* is this route retracted? */
311 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
313 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
316 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
321 TRP_PEER *peer=NULL; /* entry in the peer table */
322 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
324 tr_debug("trps_read_message: started");
325 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
326 *(trp_connection_get_gssctx(conn)),
329 tr_debug("trps_read_message: error");
335 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
336 tr_debug("trps_read_message: %.*s", buflen, buf);
338 *msg=tr_msg_decode(buf, buflen);
343 conn_peer=trp_connection_get_peer(conn);
344 if (conn_peer==NULL) {
345 tr_err("trps_read_message: connection has no peer name");
349 peer=trps_get_peer_by_gssname(trps, conn_peer);
351 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
355 /* verify we received a message we support, otherwise drop it now */
356 switch (tr_msg_get_msg_type(*msg)) {
358 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
359 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 */
360 /* update provenance if necessary */
361 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
365 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
369 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
370 tr_msg_free_decoded(*msg);
372 return TRP_UNSUPPORTED;
378 int trps_get_listener(TRPS_INSTANCE *trps,
379 TRPS_MSG_FUNC msg_handler,
380 TRP_AUTH_FUNC auth_handler,
381 const char *hostname,
390 n_fd=listen_on_all_addrs(port, fd_out, max_fd);
393 tr_err("trps_get_listener: Error opening port %d.");
395 /* opening port succeeded */
396 tr_info("trps_get_listener: Opened port %d.", port);
398 /* make the sockets non-blocking */
399 for (ii=0; ii<n_fd; ii++) {
400 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
401 tr_err("trps_get_listener: Error setting O_NONBLOCK.");
402 for (ii=0; ii<n_fd; ii++) {
413 /* store the caller's request handler & cookie */
414 trps->msg_handler = msg_handler;
415 trps->auth_handler = auth_handler;
416 trps->hostname = talloc_strdup(trps, hostname);
418 trps->cookie = cookie;
424 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
426 /* try to establish a GSS context */
427 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
428 tr_notice("trps_authorize_connection: failed to authorize connection");
429 trp_connection_close(conn);
432 tr_notice("trps_authorize_connection: authorized connection");
436 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
441 /* loop as long as the connection exists */
442 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
443 rc=trps_read_message(trps, conn, &msg);
446 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
450 trp_connection_close(conn);
454 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
458 tr_debug("trps_handle_connection: connection closed.");
461 /* TODO: check realm/comm, now part of the update instead of inforec */
462 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
465 tr_notice("trps_validate_update: null TRP update.");
469 if (trp_upd_get_realm(upd)==NULL) {
470 tr_notice("trps_validate_update: received TRP update without realm.");
474 if (trp_upd_get_comm(upd)==NULL) {
475 tr_notice("trps_validate_update: received TRP update without community.");
479 if (trp_upd_get_inforec(upd)==NULL) {
480 tr_notice("trps_validate_update: received TRP update with no info records.");
484 if (trp_upd_get_peer(upd)==NULL) {
485 tr_notice("trps_validate_update: received TRP update without origin peer information.");
493 /* ensure that the update could be accepted if feasible */
494 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
496 switch(trp_inforec_get_type(rec)) {
497 case TRP_INFOREC_TYPE_ROUTE:
498 if ((trp_inforec_get_trust_router(rec)==NULL)
499 || (trp_inforec_get_next_hop(rec)==NULL)) {
500 tr_debug("trps_validate_inforec: missing record info.");
504 /* check for valid metric */
505 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
506 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
510 /* check for valid interval */
511 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
512 tr_debug("trps_validate_inforec: invalid interval.");
517 case TRP_INFOREC_TYPE_COMMUNITY:
518 /* TODO: validate community updates */
522 tr_notice("trps_validate_inforec: unsupported record type.");
523 return TRP_UNSUPPORTED;
529 /* link cost to a peer */
530 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
535 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
537 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
539 return TRP_METRIC_INFINITY;
540 return trp_route_get_metric(entry) + trps_cost(trps, peer);
543 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
545 unsigned int rec_metric=trp_inforec_get_metric(rec);
546 unsigned int new_metric=0;
547 unsigned int current_metric=0;
548 TR_NAME *next_hop=NULL;
550 /* we check these in the validation stage, but just in case... */
551 if (trp_metric_is_invalid(rec_metric))
554 /* retractions (aka infinite metrics) are always feasible */
555 if (trp_metric_is_infinite(rec_metric))
558 /* updates from our current next hop are always feasible*/
559 next_hop=trps_get_next_hop(trps, comm, realm);
561 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
566 /* compare the existing metric we advertise to what we would advertise
567 * if we accept this update */
568 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
569 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
570 if (new_metric <= current_metric)
576 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
577 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
579 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
580 if (0!=clock_gettime(TRP_CLOCK, ts)) {
581 tr_err("trps_compute_expiry: could not read realtime clock.");
585 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
586 ts->tv_sec += small_factor*interval;
590 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
592 TRP_ROUTE *entry=NULL;
594 entry=trp_rtable_get_entry(trps->rtable,
595 trp_upd_get_comm(upd),
596 trp_upd_get_realm(upd),
597 trp_inforec_get_next_hop(rec));
599 entry=trp_route_new(NULL);
601 tr_err("trps_accept_update: unable to allocate new entry.");
605 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
606 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
607 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
608 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
609 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
610 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
611 if ((trp_route_get_comm(entry)==NULL)
612 ||(trp_route_get_realm(entry)==NULL)
613 ||(trp_route_get_peer(entry)==NULL)
614 ||(trp_route_get_trust_router(entry)==NULL)
615 ||(trp_route_get_next_hop(entry)==NULL)) {
616 /* at least one field could not be allocated */
617 tr_err("trps_accept_update: unable to allocate all fields for entry.");
618 trp_route_free(entry);
621 trp_rtable_add(trps->rtable, entry);
624 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
625 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
626 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
627 * time unset on a new route entry. */
628 tr_debug("trps_accept_update: accepting route update.");
629 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
630 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
632 /* check whether the trust router has changed */
633 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
634 trp_inforec_get_trust_router(rec))) {
635 /* The name changed. Set this route as triggered. */
636 tr_debug("trps_accept_update: trust router for route changed.");
637 trp_route_set_triggered(entry, 1);
638 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
640 if (!trps_route_retracted(trps, entry)) {
641 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
642 trp_route_set_expiry(entry, trps_compute_expiry(trps,
643 trp_route_get_interval(entry),
644 trp_route_get_expiry(entry)));
650 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
652 TRP_ROUTE *route=NULL;
655 /* determine feasibility */
656 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
657 tr_debug("trps_handle_update: record feasibility=%d", feas);
659 /* do we have an existing route? */
660 route=trps_get_route(trps,
661 trp_upd_get_comm(upd),
662 trp_upd_get_realm(upd),
663 trp_upd_get_peer(upd));
665 /* there was a route table entry already */
666 tr_debug("trps_handle_updates: route entry already exists.");
668 /* Update is feasible. Accept it. */
669 trps_accept_update(trps, upd, rec);
671 /* Update is infeasible. Ignore it unless the trust router has changed. */
672 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
673 trp_inforec_get_trust_router(rec))) {
674 /* the trust router associated with the route has changed, treat update as a retraction */
675 trps_retract_route(trps, route);
679 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
680 tr_debug("trps_handle_update: no route entry exists yet.");
681 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
682 trps_accept_update(trps, upd, rec);
688 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
691 TR_NAME *this_name=NULL;
695 return 0; /* no provenance list, so it has no names in it */
697 /* now check to see if name is in the provenance */
698 for (ii=0; ii<json_array_size(prov); ii++) {
699 s=json_string_value(json_array_get(prov, ii));
701 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
705 this_name=tr_new_name(s);
706 if (this_name==NULL) {
707 tr_debug("trps_name_in_provenance: unable to allocate name.");
710 if (0==tr_name_cmp(name, this_name)) {
711 tr_free_name(this_name);
714 tr_free_name(this_name);
719 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
721 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
722 TR_COMM *comm=tr_comm_new(tmp_ctx);
725 tr_debug("trps_create_new_comm: unable to allocate new community.");
728 /* fill in the community with info */
729 tr_comm_set_id(comm, tr_dup_name(comm_id));
730 if (tr_comm_get_id(comm)==NULL) {
731 tr_debug("trps_create_new_comm: unable to allocate community name.");
735 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
736 if (trp_inforec_get_apcs(rec)!=NULL) {
737 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
738 if (tr_comm_get_apcs(comm)==NULL) {
739 tr_debug("trps_create_new_comm: unable to allocate APC list.");
744 if (trp_inforec_get_owner_realm(rec)!=NULL) {
745 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
746 if (tr_comm_get_owner_realm(comm)==NULL) {
747 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
752 if (trp_inforec_get_owner_contact(rec)!=NULL) {
753 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
754 if (tr_comm_get_owner_contact(comm)==NULL) {
755 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
760 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
761 talloc_steal(mem_ctx, comm);
764 talloc_free(tmp_ctx);
768 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
770 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
771 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
774 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
777 /* fill in the realm */
778 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
779 if (tr_rp_realm_get_id(rp)==NULL) {
780 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
784 talloc_steal(mem_ctx, rp);
787 talloc_free(tmp_ctx);
791 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
793 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
794 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
797 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
800 /* fill in the realm */
801 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
802 if (tr_idp_realm_get_id(idp)==NULL) {
803 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
807 if (trp_inforec_get_apcs(rec)!=NULL) {
808 tr_idp_realm_set_apcs(idp, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
809 if (tr_idp_realm_get_apcs(idp)==NULL) {
810 tr_debug("trps_create_new_idp_realm: unable to allocate APC list.");
815 idp->origin=TR_REALM_DISCOVERED;
817 talloc_steal(mem_ctx, idp);
820 talloc_free(tmp_ctx);
824 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
826 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
827 TR_NAME *comm_id=trp_upd_get_comm(upd);
828 TR_NAME *realm_id=trp_upd_get_realm(upd);
829 TR_NAME *origin_id=NULL;
830 TR_NAME *our_peer_label=NULL;
832 TR_RP_REALM *rp_realm=NULL;
833 TR_IDP_REALM *idp_realm=NULL;
834 struct timespec expiry={0,0};
837 if ((comm_id==NULL) || (realm_id==NULL))
840 origin_id=trp_inforec_dup_origin(rec);
844 /* see whether we want to add this */
845 our_peer_label=trps_dup_label(trps);
846 if (our_peer_label==NULL) {
847 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
851 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
852 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
854 /* no loop occurring, accept the update */
855 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
857 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
858 comm_id->len, comm_id->buf);
859 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
861 tr_debug("trps_handle_inforec_comm: unable to create new community.");
864 tr_comm_table_add_comm(trps->ctable, comm);
866 /* TODO: see if other comm data match the new inforec and update or complain */
868 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
869 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
872 switch (trp_inforec_get_role(rec)) {
874 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
875 if (rp_realm==NULL) {
876 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
877 realm_id->len, realm_id->buf);
878 rp_realm=trps_create_new_rp_realm(tmp_ctx, realm_id, rec);
879 if (rp_realm==NULL) {
880 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
881 /* we may leave an unused community in the table, but it will only last until
882 * the next table sweep if it does not get any realms before that happens */
885 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
887 /* TODO: if realm existed, see if data match the new inforec and update or complain */
888 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
889 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
890 realm_id->len, realm_id->buf,
891 comm_id->len, comm_id->buf,
892 origin_id->len, origin_id->buf);
895 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
896 if (idp_realm==NULL) {
897 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
898 realm_id->len, realm_id->buf);
899 idp_realm=trps_create_new_idp_realm(tmp_ctx, realm_id, rec);
900 if (idp_realm==NULL) {
901 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
902 /* we may leave an unused community in the table, but it will only last until
903 * the next table sweep if it does not get any realms before that happens */
906 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
908 /* TODO: if realm existed, see if data match the new inforec and update or complain */
909 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
910 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
911 realm_id->len, realm_id->buf,
912 comm_id->len, comm_id->buf,
913 origin_id->len, origin_id->buf);
916 tr_debug("trps_handle_inforec_comm: unable to add realm.");
924 if (our_peer_label!=NULL)
925 tr_free_name(our_peer_label);
927 tr_free_name(origin_id);
928 talloc_free(tmp_ctx);
933 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
935 * @param trps Active TRPS instance
936 * @param upd TRP_UPD that contains the inforec to filter
937 * @param rec Inforec to filter
938 * @return 1 if accepted by the filter, 0 otherwise
940 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
943 TR_NAME *peer_name=NULL;
944 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
945 TR_FILTER_TARGET *target=NULL;
948 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
949 peer_name=trp_upd_get_peer(upd);
950 peer=trps_get_peer_by_gssname(trps, peer_name);
952 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
958 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
959 target= tr_filter_target_trp_inforec(NULL, upd, rec);
961 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
962 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
965 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
966 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
969 || (action!=TR_FILTER_ACTION_ACCEPT)) {
970 /* either the filter did not match or it matched a reject rule or allocating the target failed */
975 tr_filter_target_free(target);
977 /* filter matched an accept rule */
982 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
984 TRP_INFOREC *rec=NULL;
986 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
987 tr_notice("trps_handle_update: received invalid TRP update.");
991 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
992 /* validate/sanity check the record update */
993 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
994 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
999 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1000 if (!trps_filter_inbound_inforec(trps, upd, rec)) {
1001 tr_debug("trps_handle_update: inforec rejected by filter.");
1002 continue; /* just go on to the next record */
1005 switch (trp_inforec_get_type(rec)) {
1006 case TRP_INFOREC_TYPE_ROUTE:
1007 tr_debug("trps_handle_update: handling route inforec.");
1008 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1009 tr_notice("trps_handle_update: error handling route inforec.");
1011 case TRP_INFOREC_TYPE_COMMUNITY:
1012 tr_debug("trps_handle_update: handling community inforec.");
1013 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1014 tr_notice("trps_handle_update: error handling community inforec.");
1018 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1025 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1028 tr_notice("trps_validate_request: null TRP request.");
1032 if (trp_req_get_comm(req)==NULL) {
1033 tr_notice("trps_validate_request: received TRP request with null community.");
1037 if (trp_req_get_realm(req)==NULL) {
1038 tr_notice("trps_validate_request: received TRP request with null realm.");
1042 if (trp_req_get_peer(req)==NULL) {
1043 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1050 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1051 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1054 TR_NAME *exclude_peer)
1056 TRP_ROUTE **entry=NULL;
1057 TRP_ROUTE *best=NULL;
1060 unsigned int kk_min=0;
1061 unsigned int min_metric=TRP_METRIC_INFINITY;
1063 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1064 for (kk=0; kk<n_entry; kk++) {
1065 if (trp_route_get_metric(entry[kk]) < min_metric) {
1066 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1069 min_metric=trp_route_get_metric(entry[kk]);
1073 if (trp_metric_is_finite(min_metric))
1080 /* TODO: think this through more carefully. At least ought to add hysteresis
1081 * to avoid flapping between routers or routes. */
1082 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1084 size_t n_comm=0, ii=0;
1085 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1086 size_t n_realm=0, jj=0;
1087 TR_NAME **realm=NULL;
1088 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1089 unsigned int best_metric=0, cur_metric=0;
1091 for (ii=0; ii<n_comm; ii++) {
1092 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1093 for (jj=0; jj<n_realm; jj++) {
1094 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1095 if (best_route==NULL)
1096 best_metric=TRP_METRIC_INFINITY;
1098 best_metric=trp_route_get_metric(best_route);
1100 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1101 if (cur_route!=NULL) {
1102 cur_metric=trp_route_get_metric(cur_route);
1103 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1104 /* The new route has a lower metric than the previous, and is finite. Accept. */
1105 trp_route_set_selected(cur_route, 0);
1106 trp_route_set_selected(best_route, 1);
1107 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1108 trp_route_set_selected(cur_route, 0);
1109 } else if (trp_metric_is_finite(best_metric)) {
1110 trp_route_set_selected(best_route, 1);
1115 realm=NULL; n_realm=0;
1119 comm=NULL; n_comm=0;
1124 /* true if curtime >= expiry */
1125 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1127 return (tr_cmp_timespec(curtime, expiry) >= 0);
1130 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1131 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1132 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1134 struct timespec sweep_time={0,0};
1135 TRP_ROUTE **entry=NULL;
1139 /* use a single time for the entire sweep */
1140 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1141 tr_err("trps_sweep_routes: could not read realtime clock.");
1142 sweep_time.tv_sec=0;
1143 sweep_time.tv_nsec=0;
1147 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
1149 /* loop over the entries */
1150 for (ii=0; ii<n_entry; ii++) {
1151 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1152 tr_debug("trps_sweep_routes: route expired.");
1153 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1155 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1156 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1159 /* set metric to infinity and reset timer */
1160 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1161 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1162 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1163 trp_route_get_interval(entry[ii]),
1164 trp_route_get_expiry(entry[ii])));
1174 static char *timespec_to_str(struct timespec *ts)
1179 if (localtime_r(&(ts->tv_sec), &tm)==NULL)
1182 s=malloc(40); /* long enough to contain strftime result */
1186 if (strftime(s, 40, "%F %T", &tm)==0) {
1194 /* Sweep for expired communities/realms/memberships. */
1195 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1197 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1198 struct timespec sweep_time={0,0};
1199 TR_COMM_MEMB *memb=NULL;
1200 TR_COMM_ITER *iter=NULL;
1201 TRP_RC rc=TRP_ERROR;
1203 /* use a single time for the entire sweep */
1204 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1205 tr_err("trps_sweep_ctable: could not read realtime clock.");
1206 sweep_time.tv_sec=0;
1207 sweep_time.tv_nsec=0;
1211 /* iterate all memberships */
1212 iter=tr_comm_iter_new(tmp_ctx);
1214 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1218 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1220 memb=tr_comm_memb_iter_all_next(iter)) {
1221 if (tr_comm_memb_get_origin(memb)==NULL)
1222 continue; /* do not expire local entries */
1224 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1225 if (tr_comm_memb_get_times_expired(memb)>0) {
1226 /* Already expired once; flush. */
1227 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1228 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1229 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1230 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1231 timespec_to_str(tr_comm_memb_get_expiry(memb)));
1232 tr_comm_table_remove_memb(trps->ctable, memb);
1233 tr_comm_memb_free(memb);
1235 /* This is the first expiration. Note this and reset the expiry time. */
1236 tr_comm_memb_expire(memb);
1237 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1238 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1239 timespec_to_str(&sweep_time),
1240 timespec_to_str(tr_comm_memb_get_expiry(memb)),
1241 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1242 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1243 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1248 /* get rid of any unreferenced realms, etc */
1249 tr_comm_table_sweep(trps->ctable);
1252 talloc_free(tmp_ctx);
1257 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1259 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1260 return TRP_METRIC_INVALID;
1262 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1263 return TRP_METRIC_INFINITY;
1265 if (trp_metric_is_finite(m1+m2))
1268 return TRP_METRIC_INFINITY;
1271 /* convert an rentry into a new trp update info record */
1272 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1274 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1275 unsigned int linkcost=0;
1278 if (trp_route_is_local(route))
1281 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1282 trp_route_get_peer(route)));
1285 /* Note that we leave the next hop empty since the recipient fills that in.
1286 * This is where we add the link cost (currently always 1) to the next peer. */
1287 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1288 ||(trp_inforec_set_metric(rec,
1289 trps_metric_add(trp_route_get_metric(route),
1290 linkcost)) != TRP_SUCCESS)
1291 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1292 tr_err("trps_route_to_inforec: error creating route update.");
1300 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1302 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1303 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1304 TRP_INFOREC *rec=NULL;
1307 tr_err("trps_route_to_upd: could not create update message.");
1310 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1311 if (trp_upd_get_realm(upd)==NULL) {
1312 tr_err("trps_route_to_upd: could not copy realm.");
1313 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1316 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1317 if (trp_upd_get_comm(upd)==NULL) {
1318 tr_err("trps_route_to_upd: could not copy comm.");
1319 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1322 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1324 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1325 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1326 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1327 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1330 trp_upd_add_inforec(upd, rec);
1333 talloc_steal(mem_ctx, upd);
1336 talloc_free(tmp_ctx);
1340 /* select the correct route to comm/realm to be announced to peer */
1341 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1345 /* Take the currently selected route unless it is through the peer we're sending the update to.
1346 * I.e., enforce the split horizon rule. */
1347 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1349 /* No selected route, this should only happen if the only route has been retracted,
1350 * in which case we do not want to advertise it. */
1353 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1354 trp_route_get_peer(route)->buf);
1355 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1356 tr_debug("trps_select_realm_update: matched, finding alternate route");
1357 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1358 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1359 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1360 return NULL; /* don't advertise a nonexistent or retracted route */
1365 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1366 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1368 TRPS_INSTANCE *trps,
1369 TR_NAME *peer_gssname,
1373 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1374 TR_NAME **realm=NULL;
1377 TRP_ROUTE *best=NULL;
1383 for (ii=0; ii<n_comm; ii++) {
1384 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1385 for (jj=0; jj<n_realm; jj++) {
1386 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1387 /* If we found a route, add it to the list. If triggered!=0, then only
1388 * add triggered routes. */
1389 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1390 upd=trps_route_to_upd(mem_ctx, trps, best);
1392 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1395 g_ptr_array_add(updates, upd);
1411 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1413 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1414 TRP_INFOREC *rec=NULL;
1420 comm=tr_comm_memb_get_comm(memb);
1421 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1425 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1430 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1435 if ((NULL!=tr_comm_get_apcs(comm)) &&
1436 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1437 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1438 (NULL==trp_inforec_get_apcs(rec)))) {
1443 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1444 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1445 (NULL==trp_inforec_get_owner_realm(rec)))) {
1450 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1451 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1452 (NULL==trp_inforec_get_owner_contact(rec)))) {
1457 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1458 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1463 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1469 talloc_steal(mem_ctx, rec);
1472 talloc_free(tmp_ctx);
1476 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1477 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1479 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1480 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1481 TRP_INFOREC *rec=NULL;
1482 TR_COMM_ITER *iter=NULL;
1483 TR_COMM_MEMB *memb=NULL;
1488 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1489 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1490 /* leave peer empty */
1492 iter=tr_comm_iter_new(tmp_ctx);
1494 tr_err("trps_comm_update: unable to allocate iterator.");
1499 /* now add inforecs */
1500 switch (realm->role) {
1502 memb=tr_comm_table_find_idp_memb(trps->ctable,
1503 tr_realm_get_id(realm),
1504 tr_comm_get_id(comm));
1507 memb=tr_comm_table_find_rp_memb(trps->ctable,
1508 tr_realm_get_id(realm),
1509 tr_comm_get_id(comm));
1515 for (memb=tr_comm_memb_iter_first(iter, memb);
1517 memb=tr_comm_memb_iter_next(iter)) {
1518 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1520 tr_err("trps_comm_update: unable to allocate inforec.");
1524 trp_upd_add_inforec(upd, rec);
1528 if (trp_upd_get_inforec(upd)==NULL)
1529 upd=NULL; /* no inforecs, no reason to send the update */
1531 talloc_steal(mem_ctx, upd); /* success! */
1534 talloc_free(tmp_ctx);
1538 /* Find all community updates to send to a peer and add these as TR_UPD records
1539 * to the updates GPtrArray. */
1540 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1542 TRPS_INSTANCE *trps,
1543 TR_NAME *peer_gssname,
1546 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1547 TR_COMM_ITER *comm_iter=NULL;
1549 TR_COMM_ITER *realm_iter=NULL;
1550 TR_REALM *realm=NULL;
1552 TRP_RC rc=TRP_ERROR;
1554 /* currently do not send any communities on triggered updates */
1560 comm_iter=tr_comm_iter_new(tmp_ctx);
1561 realm_iter=tr_comm_iter_new(tmp_ctx);
1562 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1563 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1568 /* do every community */
1569 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1571 comm=tr_comm_table_iter_next(comm_iter)) {
1572 /* do every realm in this community */
1573 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1574 tr_comm_get_id(comm)->len,
1575 tr_comm_get_id(comm)->buf);
1576 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1578 realm=tr_realm_iter_next(realm_iter)) {
1579 /* get the update for this comm/realm */
1580 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1581 tr_realm_get_id(realm)->len,
1582 tr_realm_get_id(realm)->buf);
1583 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1585 g_ptr_array_add(updates, upd);
1590 talloc_free(tmp_ctx);
1595 * Filter the inforecs in a single update
1597 * @param filt The filter to apply
1598 * @param upd The update to filter
1600 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1602 TRP_INFOREC *this=NULL, *next=NULL;
1603 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1604 TR_FILTER_TARGET *target=NULL;
1606 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1608 target= tr_filter_target_trp_inforec(NULL, upd, this);
1610 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1611 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1614 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1615 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1616 /* Either no filter matched or one matched and rejected this record.
1617 * Also filter out record if we were unable to allocate a target. */
1618 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1621 tr_filter_target_free(target);
1626 * May shuffle the update list.
1628 * @param filters The filter set for the relevant TRP peer
1629 * @param updates GPtrArray of updates to filter
1631 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1636 /* Walk backward through the array so we can remove elements. Careful about loop
1637 * termination - remember that ii is unsigned. */
1638 for (ii=updates->len; ii>0; ii--) {
1639 upd=g_ptr_array_index(updates, ii-1);
1640 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1641 /* see if we removed all the records from this update */
1642 if (trp_upd_num_inforecs(upd)==0)
1643 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1647 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1648 static void trps_trp_upd_destroy(gpointer data)
1650 trp_upd_free((TRP_UPD *)data);
1653 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1654 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1656 TRP_UPDATE_TYPE update_type,
1660 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1661 TR_MSG msg; /* not a pointer! */
1663 TRP_ROUTE *route=NULL;
1666 TRP_RC rc=TRP_ERROR;
1667 TR_NAME *peer_label=trp_peer_get_label(peer);
1668 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1670 if (updates==NULL) {
1671 tr_err("trps_update_one_peer: unable to allocate updates array.");
1676 switch (update_type) {
1677 case TRP_UPDATE_TRIGGERED:
1678 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1679 peer_label->len, peer_label->buf);
1681 case TRP_UPDATE_SCHEDULED:
1682 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1683 peer_label->len, peer_label->buf);
1685 case TRP_UPDATE_REQUESTED:
1686 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1687 peer_label->len, peer_label->buf);
1690 tr_err("trps_update_one_peer: invalid update type requested.");
1695 /* First, gather route updates. */
1696 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1697 if ((comm==NULL) && (realm==NULL)) {
1699 rc=trps_select_route_updates_for_peer(tmp_ctx,
1703 update_type==TRP_UPDATE_TRIGGERED);
1704 } else if ((comm!=NULL) && (realm!=NULL)) {
1705 /* a single community/realm was requested */
1706 route=trps_select_realm_update(trps, comm, realm, peer_label);
1708 /* we have no actual update to send back, MUST send a retraction */
1709 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1710 route=trp_route_new(tmp_ctx);
1711 trp_route_set_comm(route, tr_dup_name(comm));
1712 trp_route_set_realm(route, tr_dup_name(realm));
1713 trp_route_set_peer(route, tr_new_name(""));
1714 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1715 trp_route_set_trust_router(route, tr_new_name(""));
1716 trp_route_set_next_hop(route, tr_new_name(""));
1718 upd=trps_route_to_upd(tmp_ctx, trps, route);
1720 tr_err("trps_update_one_peer: unable to allocate route update.");
1724 g_ptr_array_add(updates, upd);
1726 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1731 /* Second, gather community updates */
1732 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1733 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1735 /* see if we have anything to send */
1736 if (updates->len<=0)
1737 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1739 /* Apply outbound TRP filters for this peer */
1740 trps_filter_outbound_updates(peer->filters, updates);
1742 if (updates->len<=0)
1743 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1745 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1746 for (ii=0; ii<updates->len; ii++) {
1747 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1748 /* now encode the update message */
1749 tr_msg_set_trp_upd(&msg, upd);
1750 encoded = tr_msg_encode(&msg);
1751 if (encoded == NULL) {
1752 tr_err("trps_update_one_peer: error encoding update.");
1757 tr_debug("trps_update_one_peer: adding message to queue.");
1758 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1759 tr_err("trps_update_one_peer: error queueing update.");
1761 tr_debug("trps_update_one_peer: update queued successfully.");
1763 tr_msg_free_encoded(encoded);
1773 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1774 talloc_free(tmp_ctx);
1778 /* all routes/communities to all peers */
1779 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1781 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1782 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1783 TRP_PEER *peer=NULL;
1784 TRP_RC rc=TRP_SUCCESS;
1786 if (trps->ptable==NULL)
1787 return TRP_SUCCESS; /* no peers, nothing to do */
1790 tr_err("trps_update: failed to allocate peer table iterator.");
1791 talloc_free(tmp_ctx);
1795 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1796 (peer!=NULL) && (rc==TRP_SUCCESS);
1797 peer=trp_ptable_iter_next(iter))
1799 if (!trps_peer_connected(trps, peer)) {
1800 TR_NAME *peer_label=trp_peer_get_label(peer);
1801 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1802 peer_label->len, peer_label->buf);
1805 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1808 tr_debug("trps_update: rc=%u after attempting update.", rc);
1809 trp_ptable_iter_free(iter);
1810 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1811 talloc_free(tmp_ctx);
1815 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1817 trp_rtable_add(trps->rtable, route); /* should return status */
1821 /* steals the peer object */
1822 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1824 if (trps->ptable==NULL) {
1825 trps->ptable=trp_ptable_new(trps);
1826 if (trps->ptable==NULL)
1829 return trp_ptable_add(trps->ptable, peer);
1832 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1834 if (trps->ptable==NULL)
1837 return trp_ptable_find_gss_name(trps->ptable, gssname);
1840 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1842 if (trps->ptable==NULL)
1845 return trp_ptable_find_servicename(trps->ptable, servicename);
1848 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1850 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1854 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1861 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1864 TR_NAME *realm=NULL;
1866 tr_debug("trps_handle_request: handling TRP request.");
1868 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1869 tr_notice("trps_handle_request: received invalid TRP request.");
1873 if (!trp_req_is_wildcard(req)) {
1874 comm=trp_req_get_comm(req);
1875 realm=trp_req_get_realm(req);
1876 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1877 comm->len, comm->buf, realm->len, realm->buf);
1879 tr_debug("trps_handle_request: all routes requested.");
1880 /* leave comm/realm NULL */
1882 return trps_update_one_peer(trps,
1883 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1884 TRP_UPDATE_REQUESTED,
1890 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1892 TRP_RC rc=TRP_ERROR;
1894 switch (tr_msg_get_msg_type(tr_msg)) {
1896 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1897 if (rc==TRP_SUCCESS) {
1898 rc=trps_update_active_routes(trps);
1899 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1904 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1908 /* unknown error or one we don't care about (e.g., TID messages) */
1913 /* send wildcard route request to a peer */
1914 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1916 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1917 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1918 TR_MSG msg; /* not a pointer */
1919 TRP_REQ *req=trp_req_new(tmp_ctx);
1921 TRP_RC rc=TRP_ERROR;
1924 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1928 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1929 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1934 tr_msg_set_trp_req(&msg, req);
1935 encoded=tr_msg_encode(&msg);
1936 if (encoded==NULL) {
1937 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1942 tr_debug("trps_wildcard_route_req: adding message to queue.");
1943 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1944 tr_err("trps_wildcard_route_req: error queueing request.");
1947 tr_debug("trps_wildcard_route_req: request queued successfully.");
1953 tr_msg_free_encoded(encoded);
1957 talloc_free(tmp_ctx);