2 * Copyright (c) 2016, JANET(UK)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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17 * may be used to endorse or promote products derived from this software
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20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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42 #include <poll.h> // for nfds_t
48 #include <tr_name_internal.h>
49 #include <trp_internal.h>
50 #include <tr_gss_names.h>
51 #include <trp_ptable.h>
52 #include <trp_rtable.h>
55 #include <tr_socket.h>
57 static int trps_destructor(void *object)
59 TRPS_INSTANCE *trps=talloc_get_type_abort(object, TRPS_INSTANCE);
60 if (trps->rtable!=NULL)
61 trp_rtable_free(trps->rtable);
65 TRPS_INSTANCE *trps_new (TALLOC_CTX *mem_ctx)
67 TRPS_INSTANCE *trps=talloc(mem_ctx, TRPS_INSTANCE);
74 trps->update_interval=(struct timeval){0,0};
75 trps->sweep_interval=(struct timeval){0,0};
78 trps->mq=tr_mq_new(trps);
80 /* failed to allocate mq */
86 if (trps_init_rtable(trps) != TRP_SUCCESS) {
87 /* failed to allocate rtable */
92 talloc_set_destructor((void *)trps, trps_destructor);
97 /* create a new route table, first discarding an old one if necessary */
98 TRP_RC trps_init_rtable(TRPS_INSTANCE *trps)
100 if (trps->rtable != NULL) {
101 trp_rtable_free(trps->rtable);
105 trps->rtable=trp_rtable_new();
106 if (trps->rtable==NULL) {
112 void trps_clear_rtable(TRPS_INSTANCE *trps)
114 trp_rtable_clear(trps->rtable);
117 void trps_free (TRPS_INSTANCE *trps)
123 TR_MQ_MSG *trps_mq_pop(TRPS_INSTANCE *trps)
125 return tr_mq_pop(trps->mq, 0);
128 void trps_mq_add(TRPS_INSTANCE *trps, TR_MQ_MSG *msg)
130 tr_mq_add(trps->mq, msg);
133 unsigned int trps_get_connect_interval(TRPS_INSTANCE *trps)
135 return trps->connect_interval.tv_sec;
138 void trps_set_connect_interval(TRPS_INSTANCE *trps, unsigned int interval)
140 trps->connect_interval.tv_sec=interval;
141 trps->connect_interval.tv_usec=0;
144 unsigned int trps_get_update_interval(TRPS_INSTANCE *trps)
146 return trps->update_interval.tv_sec;
149 void trps_set_update_interval(TRPS_INSTANCE *trps, unsigned int interval)
151 trps->update_interval.tv_sec=interval;
152 trps->update_interval.tv_usec=0;
155 unsigned int trps_get_sweep_interval(TRPS_INSTANCE *trps)
157 return trps->sweep_interval.tv_sec;
160 void trps_set_sweep_interval(TRPS_INSTANCE *trps, unsigned int interval)
162 trps->sweep_interval.tv_sec=interval;
163 trps->sweep_interval.tv_usec=0;
166 void trps_set_ctable(TRPS_INSTANCE *trps, TR_COMM_TABLE *comm)
171 void trps_set_ptable(TRPS_INSTANCE *trps, TRP_PTABLE *ptable)
173 if (trps->ptable!=NULL)
174 trp_ptable_free(trps->ptable);
178 void trps_set_peer_status_callback(TRPS_INSTANCE *trps, void (*cb)(TRP_PEER *, void *), void *cookie)
180 TRP_PTABLE_ITER *iter=NULL;
182 if (trps->ptable==NULL)
185 iter=trp_ptable_iter_new(NULL);
186 for (peer=trp_ptable_iter_first(iter, trps->ptable); peer!=NULL; peer=trp_ptable_iter_next(iter))
187 trp_peer_set_conn_status_cb(peer, cb, cookie);
188 trp_ptable_iter_free(iter);
191 /* Get the label peers will know us by - needs to match trp_peer_get_label() output.
192 * There is no get, only dup, because we don't store the label except when requested. */
193 TR_NAME *trps_dup_label(TRPS_INSTANCE *trps)
195 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
197 char *s=talloc_asprintf(tmp_ctx, "%s:%u", trps->hostname, trps->port);
200 label=tr_new_name(s);
203 talloc_free(tmp_ctx);
207 TRPC_INSTANCE *trps_find_trpc(TRPS_INSTANCE *trps, TRP_PEER *peer)
209 TRPC_INSTANCE *cur=NULL;
211 TR_NAME *peer_servicename=trp_peer_get_servicename(peer);
213 for (cur=trps->trpc; cur!=NULL; cur=trpc_get_next(cur)) {
214 name=trpc_get_gssname(cur);
215 if ((name!=NULL) && (0==tr_name_cmp(peer_servicename, name))) {
222 void trps_add_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *new)
224 if (trps->conn==NULL)
227 trp_connection_append(trps->conn, new);
229 talloc_steal(trps, new);
232 /* ok to call more than once; guarantees connection no longer in the list.
233 * Caller is responsible for freeing the removed element afterwards. */
234 void trps_remove_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *remove)
236 trps->conn=trp_connection_remove(trps->conn, remove);
239 void trps_add_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *trpc)
241 if (trps->trpc==NULL)
244 trpc_append(trps->trpc, trpc);
246 talloc_steal(trps, trpc);
249 /* ok to call more than once; guarantees trpc no longer in the list.
250 * Caller is responsible for freeing the removed element afterwards. */
251 void trps_remove_trpc(TRPS_INSTANCE *trps, TRPC_INSTANCE *remove)
253 trps->trpc=trpc_remove(trps->trpc, remove);
256 TRP_RC trps_send_msg(TRPS_INSTANCE *trps, TRP_PEER *peer, const char *msg)
258 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
259 TR_MQ_MSG *mq_msg=NULL;
262 TRPC_INSTANCE *trpc=NULL;
264 /* get the connection for this peer */
265 trpc=trps_find_trpc(trps, peer);
266 /* instead, let's let that happen and then clear the queue when an attempt to
269 tr_warning("trps_send_msg: skipping message queued for missing TRP client entry.");
271 mq_msg=tr_mq_msg_new(tmp_ctx, TR_MQMSG_TRPC_SEND, TR_MQ_PRIO_NORMAL);
272 msg_dup=talloc_strdup(mq_msg, msg); /* get local copy in mq_msg context */
273 tr_mq_msg_set_payload(mq_msg, msg_dup, NULL); /* no need for a free() func */
274 trpc_mq_add(trpc, mq_msg);
277 talloc_free(tmp_ctx);
281 /* get the currently selected route if available */
282 TRP_ROUTE *trps_get_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
284 return trp_rtable_get_entry(trps->rtable, comm, realm, peer);
287 TRP_ROUTE *trps_get_selected_route(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
289 tr_debug("trps_get_selected_route: entered. trps=%p, comm=%p, realm=%p", trps, comm, realm);
290 return trp_rtable_get_selected_entry(trps->rtable, comm, realm);
293 /* copy the result if you want to keep it */
294 TR_NAME *trps_get_next_hop(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm)
296 TRP_ROUTE *route=trps_get_selected_route(trps, comm, realm);
300 return trp_route_get_next_hop(route);
304 /* mark a route as retracted */
305 static void trps_retract_route(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
307 trp_route_set_metric(entry, TRP_METRIC_INFINITY);
308 trp_route_set_triggered(entry, 1);
311 /* is this route retracted? */
312 static int trps_route_retracted(TRPS_INSTANCE *trps, TRP_ROUTE *entry)
314 return (trp_metric_is_infinite(trp_route_get_metric(entry)));
317 static TRP_RC trps_read_message(TRPS_INSTANCE *trps, TRP_CONNECTION *conn, TR_MSG **msg)
322 TRP_PEER *peer=NULL; /* entry in the peer table */
323 TR_NAME *conn_peer=NULL; /* name from the TRP_CONN, which comes from the gss context */
325 tr_debug("trps_read_message: started");
326 if (err = gsscon_read_encrypted_token(trp_connection_get_fd(conn),
327 *(trp_connection_get_gssctx(conn)),
330 tr_debug("trps_read_message: error");
336 tr_debug("trps_read_message: message received, %u bytes.", (unsigned) buflen);
337 tr_debug("trps_read_message: %.*s", buflen, buf);
339 *msg=tr_msg_decode(buf, buflen);
344 conn_peer=trp_connection_get_peer(conn);
345 if (conn_peer==NULL) {
346 tr_err("trps_read_message: connection has no peer name");
350 peer=trps_get_peer_by_gssname(trps, conn_peer);
352 tr_err("trps_read_message: could not find peer with gssname=%s", trp_connection_get_gssname(conn));
356 /* verify we received a message we support, otherwise drop it now */
357 switch (tr_msg_get_msg_type(*msg)) {
359 trp_upd_set_peer(tr_msg_get_trp_upd(*msg), tr_dup_name(conn_peer));
360 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 */
361 /* update provenance if necessary */
362 trp_upd_add_to_provenance(tr_msg_get_trp_upd(*msg), trp_peer_get_label(peer));
366 trp_req_set_peer(tr_msg_get_trp_req(*msg), tr_dup_name(conn_peer));
370 tr_debug("trps_read_message: received unsupported message from %.*s", conn_peer->len, conn_peer->buf);
371 tr_msg_free_decoded(*msg);
373 return TRP_UNSUPPORTED;
379 int trps_get_listener(TRPS_INSTANCE *trps,
380 TRPS_MSG_FUNC msg_handler,
381 TRP_AUTH_FUNC auth_handler,
382 const char *hostname,
391 n_fd = tr_sock_listen_all(port, fd_out, max_fd);
394 tr_err("trps_get_listener: Error opening port %d.");
396 /* opening port succeeded */
397 tr_info("trps_get_listener: Opened port %d.", port);
399 /* make the sockets non-blocking */
400 for (ii=0; ii<n_fd; ii++) {
401 if (0 != fcntl(fd_out[ii], F_SETFL, O_NONBLOCK)) {
402 tr_err("trps_get_listener: Error setting O_NONBLOCK.");
403 for (ii=0; ii<n_fd; ii++) {
414 /* store the caller's request handler & cookie */
415 trps->msg_handler = msg_handler;
416 trps->auth_handler = auth_handler;
417 trps->hostname = talloc_strdup(trps, hostname);
419 trps->cookie = cookie;
425 TRP_RC trps_authorize_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
427 /* try to establish a GSS context */
428 if (0!=trp_connection_auth(conn, trps->auth_handler, trps->cookie)) {
429 tr_notice("trps_authorize_connection: failed to authorize connection");
430 trp_connection_close(conn);
433 tr_notice("trps_authorize_connection: authorized connection");
437 void trps_handle_connection(TRPS_INSTANCE *trps, TRP_CONNECTION *conn)
442 /* loop as long as the connection exists */
443 while (trp_connection_get_status(conn)==TRP_CONNECTION_UP) {
444 rc=trps_read_message(trps, conn, &msg);
447 trps->msg_handler(trps, conn, msg); /* send the TR_MSG off to the callback */
451 trp_connection_close(conn);
455 tr_debug("trps_handle_connection: trps_read_message failed (%d)", rc);
459 tr_debug("trps_handle_connection: connection closed.");
462 /* TODO: check realm/comm, now part of the update instead of inforec */
463 static TRP_RC trps_validate_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
466 tr_notice("trps_validate_update: null TRP update.");
470 if (trp_upd_get_realm(upd)==NULL) {
471 tr_notice("trps_validate_update: received TRP update without realm.");
475 if (trp_upd_get_comm(upd)==NULL) {
476 tr_notice("trps_validate_update: received TRP update without community.");
480 if (trp_upd_get_inforec(upd)==NULL) {
481 tr_notice("trps_validate_update: received TRP update with no info records.");
485 if (trp_upd_get_peer(upd)==NULL) {
486 tr_notice("trps_validate_update: received TRP update without origin peer information.");
494 /* ensure that the update could be accepted if feasible */
495 static TRP_RC trps_validate_inforec(TRPS_INSTANCE *trps, TRP_INFOREC *rec)
497 switch(trp_inforec_get_type(rec)) {
498 case TRP_INFOREC_TYPE_ROUTE:
499 if ((trp_inforec_get_trust_router(rec)==NULL)
500 || (trp_inforec_get_next_hop(rec)==NULL)) {
501 tr_debug("trps_validate_inforec: missing record info.");
505 /* check for valid metric */
506 if (trp_metric_is_invalid(trp_inforec_get_metric(rec))) {
507 tr_debug("trps_validate_inforec: invalid metric (%u).", trp_inforec_get_metric(rec));
511 /* check for valid interval */
512 if (trp_inforec_get_interval(rec)==TRP_INTERVAL_INVALID) {
513 tr_debug("trps_validate_inforec: invalid interval.");
518 case TRP_INFOREC_TYPE_COMMUNITY:
519 /* TODO: validate community updates */
523 tr_notice("trps_validate_inforec: unsupported record type.");
524 return TRP_UNSUPPORTED;
530 /* link cost to a peer */
531 static unsigned int trps_cost(TRPS_INSTANCE *trps, TR_NAME *peer)
536 static unsigned int trps_advertised_metric(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer)
538 TRP_ROUTE *entry=trp_rtable_get_entry(trps->rtable, comm, realm, peer);
540 return TRP_METRIC_INFINITY;
541 return trp_route_get_metric(entry) + trps_cost(trps, peer);
544 static int trps_check_feasibility(TRPS_INSTANCE *trps, TR_NAME *realm, TR_NAME *comm, TRP_INFOREC *rec)
546 unsigned int rec_metric=trp_inforec_get_metric(rec);
547 unsigned int new_metric=0;
548 unsigned int current_metric=0;
549 TR_NAME *next_hop=NULL;
551 /* we check these in the validation stage, but just in case... */
552 if (trp_metric_is_invalid(rec_metric))
555 /* retractions (aka infinite metrics) are always feasible */
556 if (trp_metric_is_infinite(rec_metric))
559 /* updates from our current next hop are always feasible*/
560 next_hop=trps_get_next_hop(trps, comm, realm);
562 && (0==tr_name_cmp(next_hop,trp_inforec_get_next_hop(rec)))) {
567 /* compare the existing metric we advertise to what we would advertise
568 * if we accept this update */
569 current_metric=trps_advertised_metric(trps, comm, realm, trp_inforec_get_next_hop(rec));
570 new_metric=rec_metric + trps_cost(trps, trp_inforec_get_next_hop(rec));
571 if (new_metric <= current_metric)
577 /* uses memory pointed to by *ts, also returns that value. On error, its contents are {0,0} */
578 static struct timespec *trps_compute_expiry(TRPS_INSTANCE *trps, unsigned int interval, struct timespec *ts)
580 const unsigned int small_factor=3; /* how many intervals we wait before expiring */
581 if (0!=clock_gettime(TRP_CLOCK, ts)) {
582 tr_err("trps_compute_expiry: could not read realtime clock.");
586 tr_debug("trps_compute_expiry: tv_sec=%u, interval=%u, small_factor*interval=%u", ts->tv_sec, interval, small_factor*interval);
587 ts->tv_sec += small_factor*interval;
591 static TRP_RC trps_accept_update(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
593 TRP_ROUTE *entry=NULL;
595 entry=trp_rtable_get_entry(trps->rtable,
596 trp_upd_get_comm(upd),
597 trp_upd_get_realm(upd),
598 trp_inforec_get_next_hop(rec));
600 entry=trp_route_new(NULL);
602 tr_err("trps_accept_update: unable to allocate new entry.");
606 trp_route_set_comm(entry, trp_upd_dup_comm(upd));
607 trp_route_set_realm(entry, trp_upd_dup_realm(upd));
608 trp_route_set_peer(entry, trp_upd_dup_peer(upd));
609 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec));
610 trp_route_set_next_hop(entry, trp_inforec_dup_next_hop(rec));
611 /* TODO: pass next hop port (now defaults to TID_PORT) --jlr */
612 if ((trp_route_get_comm(entry)==NULL)
613 ||(trp_route_get_realm(entry)==NULL)
614 ||(trp_route_get_peer(entry)==NULL)
615 ||(trp_route_get_trust_router(entry)==NULL)
616 ||(trp_route_get_next_hop(entry)==NULL)) {
617 /* at least one field could not be allocated */
618 tr_err("trps_accept_update: unable to allocate all fields for entry.");
619 trp_route_free(entry);
622 trp_rtable_add(trps->rtable, entry);
625 /* We now have an entry in the table, whether it's new or not. Update metric and expiry, unless
626 * the metric is infinity. An infinite metric can only occur here if we just retracted an existing
627 * route (we never accept retractions as new routes), so there is no risk of leaving the expiry
628 * time unset on a new route entry. */
629 tr_debug("trps_accept_update: accepting route update.");
630 trp_route_set_metric(entry, trp_inforec_get_metric(rec));
631 trp_route_set_interval(entry, trp_inforec_get_interval(rec));
633 /* check whether the trust router has changed */
634 if (0!=tr_name_cmp(trp_route_get_trust_router(entry),
635 trp_inforec_get_trust_router(rec))) {
636 /* The name changed. Set this route as triggered. */
637 tr_debug("trps_accept_update: trust router for route changed.");
638 trp_route_set_triggered(entry, 1);
639 trp_route_set_trust_router(entry, trp_inforec_dup_trust_router(rec)); /* frees old name */
641 if (!trps_route_retracted(trps, entry)) {
642 tr_debug("trps_accept_update: route not retracted, setting expiry timer.");
643 trp_route_set_expiry(entry, trps_compute_expiry(trps,
644 trp_route_get_interval(entry),
645 trp_route_get_expiry(entry)));
651 static TRP_RC trps_handle_inforec_route(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
653 TRP_ROUTE *route=NULL;
656 /* determine feasibility */
657 feas=trps_check_feasibility(trps, trp_upd_get_realm(upd), trp_upd_get_comm(upd), rec);
658 tr_debug("trps_handle_update: record feasibility=%d", feas);
660 /* do we have an existing route? */
661 route=trps_get_route(trps,
662 trp_upd_get_comm(upd),
663 trp_upd_get_realm(upd),
664 trp_upd_get_peer(upd));
666 /* there was a route table entry already */
667 tr_debug("trps_handle_updates: route entry already exists.");
669 /* Update is feasible. Accept it. */
670 trps_accept_update(trps, upd, rec);
672 /* Update is infeasible. Ignore it unless the trust router has changed. */
673 if (0!=tr_name_cmp(trp_route_get_trust_router(route),
674 trp_inforec_get_trust_router(rec))) {
675 /* the trust router associated with the route has changed, treat update as a retraction */
676 trps_retract_route(trps, route);
680 /* No existing route table entry. Ignore it unless it is feasible and not a retraction. */
681 tr_debug("trps_handle_update: no route entry exists yet.");
682 if (feas && trp_metric_is_finite(trp_inforec_get_metric(rec)))
683 trps_accept_update(trps, upd, rec);
689 static int trps_name_in_provenance(TR_NAME *name, json_t *prov)
692 TR_NAME *this_name=NULL;
696 return 0; /* no provenance list, so it has no names in it */
698 /* now check to see if name is in the provenance */
699 for (ii=0; ii<json_array_size(prov); ii++) {
700 s=json_string_value(json_array_get(prov, ii));
702 tr_debug("trps_name_in_provenance: empty entry in provenance list.");
706 this_name=tr_new_name(s);
707 if (this_name==NULL) {
708 tr_debug("trps_name_in_provenance: unable to allocate name.");
711 if (0==tr_name_cmp(name, this_name)) {
712 tr_free_name(this_name);
715 tr_free_name(this_name);
720 static TR_COMM *trps_create_new_comm(TALLOC_CTX *mem_ctx, TR_NAME *comm_id, TRP_INFOREC *rec)
722 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
723 TR_COMM *comm=tr_comm_new(tmp_ctx);
726 tr_debug("trps_create_new_comm: unable to allocate new community.");
729 /* fill in the community with info */
730 tr_comm_set_id(comm, tr_dup_name(comm_id));
731 if (tr_comm_get_id(comm)==NULL) {
732 tr_debug("trps_create_new_comm: unable to allocate community name.");
736 tr_comm_set_type(comm, trp_inforec_get_comm_type(rec));
737 if (trp_inforec_get_apcs(rec)!=NULL) {
738 tr_comm_set_apcs(comm, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
739 if (tr_comm_get_apcs(comm)==NULL) {
740 tr_debug("trps_create_new_comm: unable to allocate APC list.");
745 if (trp_inforec_get_owner_realm(rec)!=NULL) {
746 tr_comm_set_owner_realm(comm, tr_dup_name(trp_inforec_get_owner_realm(rec)));
747 if (tr_comm_get_owner_realm(comm)==NULL) {
748 tr_debug("trps_create_new_comm: unable to allocate owner realm name.");
753 if (trp_inforec_get_owner_contact(rec)!=NULL) {
754 tr_comm_set_owner_contact(comm, tr_dup_name(trp_inforec_get_owner_contact(rec)));
755 if (tr_comm_get_owner_contact(comm)==NULL) {
756 tr_debug("trps_create_new_comm: unable to allocate owner contact.");
761 comm->expiration_interval=trp_inforec_get_exp_interval(rec);
762 talloc_steal(mem_ctx, comm);
765 talloc_free(tmp_ctx);
769 static TR_RP_REALM *trps_create_new_rp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
771 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
772 TR_RP_REALM *rp=tr_rp_realm_new(tmp_ctx);
775 tr_debug("trps_create_new_rp_realm: unable to allocate new realm.");
778 /* fill in the realm */
779 tr_rp_realm_set_id(rp, tr_dup_name(realm_id));
780 if (tr_rp_realm_get_id(rp)==NULL) {
781 tr_debug("trps_create_new_rp_realm: unable to allocate realm name.");
785 talloc_steal(mem_ctx, rp);
788 talloc_free(tmp_ctx);
792 static TR_IDP_REALM *trps_create_new_idp_realm(TALLOC_CTX *mem_ctx, TR_NAME *realm_id, TRP_INFOREC *rec)
794 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
795 TR_IDP_REALM *idp=tr_idp_realm_new(tmp_ctx);
798 tr_debug("trps_create_new_idp_realm: unable to allocate new realm.");
801 /* fill in the realm */
802 tr_idp_realm_set_id(idp, tr_dup_name(realm_id));
803 if (tr_idp_realm_get_id(idp)==NULL) {
804 tr_debug("trps_create_new_idp_realm: unable to allocate realm name.");
808 if (trp_inforec_get_apcs(rec)!=NULL) {
809 tr_idp_realm_set_apcs(idp, tr_apc_dup(tmp_ctx, trp_inforec_get_apcs(rec)));
810 if (tr_idp_realm_get_apcs(idp)==NULL) {
811 tr_debug("trps_create_new_idp_realm: unable to allocate APC list.");
816 idp->origin=TR_REALM_DISCOVERED;
818 talloc_steal(mem_ctx, idp);
821 talloc_free(tmp_ctx);
825 static TRP_RC trps_handle_inforec_comm(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
827 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
828 TR_NAME *comm_id=trp_upd_get_comm(upd);
829 TR_NAME *realm_id=trp_upd_get_realm(upd);
830 TR_NAME *origin_id=NULL;
831 TR_NAME *our_peer_label=NULL;
833 TR_RP_REALM *rp_realm=NULL;
834 TR_IDP_REALM *idp_realm=NULL;
835 struct timespec expiry={0,0};
838 if ((comm_id==NULL) || (realm_id==NULL))
841 origin_id=trp_inforec_dup_origin(rec);
845 /* see whether we want to add this */
846 our_peer_label=trps_dup_label(trps);
847 if (our_peer_label==NULL) {
848 tr_debug("trps_handle_inforec_comm: unable to allocate peer label.");
852 if (trps_name_in_provenance(our_peer_label, trp_inforec_get_provenance(rec)))
853 tr_debug("trps_handle_inforec_comm: rejecting community inforec to avoid provenance loop.");
855 /* no loop occurring, accept the update */
856 comm=tr_comm_table_find_comm(trps->ctable, comm_id);
858 tr_debug("trps_handle_inforec_comm: unknown community %.*s in inforec, creating it.",
859 comm_id->len, comm_id->buf);
860 comm=trps_create_new_comm(tmp_ctx, comm_id, rec);
862 tr_debug("trps_handle_inforec_comm: unable to create new community.");
865 tr_comm_table_add_comm(trps->ctable, comm);
867 /* TODO: see if other comm data match the new inforec and update or complain */
869 trps_compute_expiry(trps, trp_inforec_get_interval(rec), &expiry);
870 if ((expiry.tv_sec==0)&&(expiry.tv_nsec==0))
873 switch (trp_inforec_get_role(rec)) {
875 rp_realm=tr_rp_realm_lookup(trps->ctable->rp_realms, realm_id);
876 if (rp_realm==NULL) {
877 tr_debug("trps_handle_inforec_comm: unknown RP realm %.*s in inforec, creating it.",
878 realm_id->len, realm_id->buf);
879 rp_realm=trps_create_new_rp_realm(tmp_ctx, realm_id, rec);
880 if (rp_realm==NULL) {
881 tr_debug("trps_handle_inforec_comm: unable to create new RP realm.");
882 /* we may leave an unused community in the table, but it will only last until
883 * the next table sweep if it does not get any realms before that happens */
886 tr_comm_table_add_rp_realm(trps->ctable, rp_realm);
888 /* TODO: if realm existed, see if data match the new inforec and update or complain */
889 tr_comm_add_rp_realm(trps->ctable, comm, rp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
890 tr_debug("trps_handle_inforec_comm: added RP realm %.*s to comm %.*s (origin %.*s).",
891 realm_id->len, realm_id->buf,
892 comm_id->len, comm_id->buf,
893 origin_id->len, origin_id->buf);
896 idp_realm=tr_idp_realm_lookup(trps->ctable->idp_realms, realm_id);
897 if (idp_realm==NULL) {
898 tr_debug("trps_handle_inforec_comm: unknown IDP realm %.*s in inforec, creating it.",
899 realm_id->len, realm_id->buf);
900 idp_realm=trps_create_new_idp_realm(tmp_ctx, realm_id, rec);
901 if (idp_realm==NULL) {
902 tr_debug("trps_handle_inforec_comm: unable to create new IDP realm.");
903 /* we may leave an unused community in the table, but it will only last until
904 * the next table sweep if it does not get any realms before that happens */
907 tr_comm_table_add_idp_realm(trps->ctable, idp_realm);
909 /* TODO: if realm existed, see if data match the new inforec and update or complain */
910 tr_comm_add_idp_realm(trps->ctable, comm, idp_realm, trp_inforec_get_interval(rec), trp_inforec_get_provenance(rec), &expiry);
911 tr_debug("trps_handle_inforec_comm: added IDP realm %.*s to comm %.*s (origin %.*s).",
912 realm_id->len, realm_id->buf,
913 comm_id->len, comm_id->buf,
914 origin_id->len, origin_id->buf);
917 tr_debug("trps_handle_inforec_comm: unable to add realm.");
925 if (our_peer_label!=NULL)
926 tr_free_name(our_peer_label);
928 tr_free_name(origin_id);
929 talloc_free(tmp_ctx);
934 * Apply applicable TRP_INBOUND filters to an inforec. Rejects everything if peer has no filters.
936 * @param trps Active TRPS instance
937 * @param upd TRP_UPD that contains the inforec to filter
938 * @param rec Inforec to filter
939 * @return 1 if accepted by the filter, 0 otherwise
941 static int trps_filter_inbound_inforec(TRPS_INSTANCE *trps, TRP_UPD *upd, TRP_INFOREC *rec)
944 TR_NAME *peer_name=NULL;
945 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
946 TR_FILTER_TARGET *target=NULL;
949 /* Look up the peer. For inbound messages, the peer is identified by its GSS name */
950 peer_name=trp_upd_get_peer(upd);
951 peer=trps_get_peer_by_gssname(trps, peer_name);
953 tr_err("trps_filter_inbound_inforec: received inforec from unknown peer (%.*s), rejecting.",
959 /* tr_filter_apply() and tr_filter_set_get() handle null filter sets/filters by rejecting */
960 target= tr_filter_target_trp_inforec(NULL, upd, rec);
962 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
963 tr_crit("trps_filter_inbound_inforec: Unable to allocate filter target, cannot apply filter!");
966 || (TR_FILTER_NO_MATCH==tr_filter_apply(target,
967 tr_filter_set_get(peer->filters, TR_FILTER_TYPE_TRP_INBOUND),
970 || (action!=TR_FILTER_ACTION_ACCEPT)) {
971 /* either the filter did not match or it matched a reject rule or allocating the target failed */
976 tr_filter_target_free(target);
978 /* filter matched an accept rule */
983 static TRP_RC trps_handle_update(TRPS_INSTANCE *trps, TRP_UPD *upd)
985 TRP_INFOREC *rec=NULL;
987 if (trps_validate_update(trps, upd) != TRP_SUCCESS) {
988 tr_notice("trps_handle_update: received invalid TRP update.");
992 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
993 /* validate/sanity check the record update */
994 if (trps_validate_inforec(trps, rec) != TRP_SUCCESS) {
995 tr_notice("trps_handle_update: invalid inforec in TRP update, discarding entire update.");
1000 for (rec=trp_upd_get_inforec(upd); rec!=NULL; rec=trp_inforec_get_next(rec)) {
1001 if (!trps_filter_inbound_inforec(trps, upd, rec)) {
1002 tr_debug("trps_handle_update: inforec rejected by filter.");
1003 continue; /* just go on to the next record */
1006 switch (trp_inforec_get_type(rec)) {
1007 case TRP_INFOREC_TYPE_ROUTE:
1008 tr_debug("trps_handle_update: handling route inforec.");
1009 if (TRP_SUCCESS!=trps_handle_inforec_route(trps, upd, rec))
1010 tr_notice("trps_handle_update: error handling route inforec.");
1012 case TRP_INFOREC_TYPE_COMMUNITY:
1013 tr_debug("trps_handle_update: handling community inforec.");
1014 if (TRP_SUCCESS!=trps_handle_inforec_comm(trps, upd, rec))
1015 tr_notice("trps_handle_update: error handling community inforec.");
1019 tr_notice("trps_handle_update: unsupported inforec in TRP update.");
1026 static TRP_RC trps_validate_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1029 tr_notice("trps_validate_request: null TRP request.");
1033 if (trp_req_get_comm(req)==NULL) {
1034 tr_notice("trps_validate_request: received TRP request with null community.");
1038 if (trp_req_get_realm(req)==NULL) {
1039 tr_notice("trps_validate_request: received TRP request with null realm.");
1043 if (trp_req_get_peer(req)==NULL) {
1044 tr_notice("trps_validate_request: received TRP request without origin peer information.");
1051 /* choose the best route to comm/realm, optionally excluding routes to a particular peer */
1052 static TRP_ROUTE *trps_find_best_route(TRPS_INSTANCE *trps,
1055 TR_NAME *exclude_peer)
1057 TRP_ROUTE **entry=NULL;
1058 TRP_ROUTE *best=NULL;
1061 unsigned int kk_min=0;
1062 unsigned int min_metric=TRP_METRIC_INFINITY;
1064 entry=trp_rtable_get_realm_entries(trps->rtable, comm, realm, &n_entry);
1065 for (kk=0; kk<n_entry; kk++) {
1066 if (trp_route_get_metric(entry[kk]) < min_metric) {
1067 if ((exclude_peer==NULL) || (0!=tr_name_cmp(trp_route_get_peer(entry[kk]),
1070 min_metric=trp_route_get_metric(entry[kk]);
1074 if (trp_metric_is_finite(min_metric))
1081 /* TODO: think this through more carefully. At least ought to add hysteresis
1082 * to avoid flapping between routers or routes. */
1083 TRP_RC trps_update_active_routes(TRPS_INSTANCE *trps)
1085 size_t n_comm=0, ii=0;
1086 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1087 size_t n_realm=0, jj=0;
1088 TR_NAME **realm=NULL;
1089 TRP_ROUTE *best_route=NULL, *cur_route=NULL;
1090 unsigned int best_metric=0, cur_metric=0;
1092 for (ii=0; ii<n_comm; ii++) {
1093 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1094 for (jj=0; jj<n_realm; jj++) {
1095 best_route=trps_find_best_route(trps, comm[ii], realm[jj], NULL);
1096 if (best_route==NULL)
1097 best_metric=TRP_METRIC_INFINITY;
1099 best_metric=trp_route_get_metric(best_route);
1101 cur_route=trps_get_selected_route(trps, comm[ii], realm[jj]);
1102 if (cur_route!=NULL) {
1103 cur_metric=trp_route_get_metric(cur_route);
1104 if ((best_metric < cur_metric) && (trp_metric_is_finite(best_metric))) {
1105 /* The new route has a lower metric than the previous, and is finite. Accept. */
1106 trp_route_set_selected(cur_route, 0);
1107 trp_route_set_selected(best_route, 1);
1108 } else if (!trp_metric_is_finite(cur_metric)) /* rejects infinite or invalid metrics */
1109 trp_route_set_selected(cur_route, 0);
1110 } else if (trp_metric_is_finite(best_metric)) {
1111 trp_route_set_selected(best_route, 1);
1116 realm=NULL; n_realm=0;
1120 comm=NULL; n_comm=0;
1125 /* true if curtime >= expiry */
1126 static int trps_expired(struct timespec *expiry, struct timespec *curtime)
1128 return (tr_cmp_timespec(curtime, expiry) >= 0);
1131 /* Sweep for expired routes. For each expired route, if its metric is infinite, the route is flushed.
1132 * If its metric is finite, the metric is set to infinite and the route's expiration time is updated. */
1133 TRP_RC trps_sweep_routes(TRPS_INSTANCE *trps)
1135 struct timespec sweep_time={0,0};
1136 TRP_ROUTE **entry=NULL;
1140 /* use a single time for the entire sweep */
1141 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1142 tr_err("trps_sweep_routes: could not read realtime clock.");
1143 sweep_time.tv_sec=0;
1144 sweep_time.tv_nsec=0;
1148 entry=trp_rtable_get_entries(trps->rtable, &n_entry); /* must talloc_free *entry */
1150 /* loop over the entries */
1151 for (ii=0; ii<n_entry; ii++) {
1152 if (!trp_route_is_local(entry[ii]) && trps_expired(trp_route_get_expiry(entry[ii]), &sweep_time)) {
1153 tr_debug("trps_sweep_routes: route expired.");
1154 if (!trp_metric_is_finite(trp_route_get_metric(entry[ii]))) {
1156 tr_debug("trps_sweep_routes: metric was infinity, flushing route.");
1157 trp_rtable_remove(trps->rtable, entry[ii]); /* entry[ii] is no longer valid */
1160 /* set metric to infinity and reset timer */
1161 tr_debug("trps_sweep_routes: setting metric to infinity and resetting expiry.");
1162 trp_route_set_metric(entry[ii], TRP_METRIC_INFINITY);
1163 trp_route_set_expiry(entry[ii], trps_compute_expiry(trps,
1164 trp_route_get_interval(entry[ii]),
1165 trp_route_get_expiry(entry[ii])));
1175 static char *timespec_to_str(struct timespec *ts)
1180 if (localtime_r(&(ts->tv_sec), &tm)==NULL)
1183 s=malloc(40); /* long enough to contain strftime result */
1187 if (strftime(s, 40, "%F %T", &tm)==0) {
1195 /* Sweep for expired communities/realms/memberships. */
1196 TRP_RC trps_sweep_ctable(TRPS_INSTANCE *trps)
1198 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1199 struct timespec sweep_time={0,0};
1200 TR_COMM_MEMB *memb=NULL;
1201 TR_COMM_ITER *iter=NULL;
1202 TRP_RC rc=TRP_ERROR;
1204 /* use a single time for the entire sweep */
1205 if (0!=clock_gettime(TRP_CLOCK, &sweep_time)) {
1206 tr_err("trps_sweep_ctable: could not read realtime clock.");
1207 sweep_time.tv_sec=0;
1208 sweep_time.tv_nsec=0;
1212 /* iterate all memberships */
1213 iter=tr_comm_iter_new(tmp_ctx);
1215 tr_err("trps_sweep_ctable: unable to allocate iterator.");
1219 for (memb=tr_comm_memb_iter_all_first(iter, trps->ctable);
1221 memb=tr_comm_memb_iter_all_next(iter)) {
1222 if (tr_comm_memb_get_origin(memb)==NULL)
1223 continue; /* do not expire local entries */
1225 if (tr_comm_memb_is_expired(memb, &sweep_time)) {
1226 if (tr_comm_memb_get_times_expired(memb)>0) {
1227 /* Already expired once; flush. */
1228 tr_debug("trps_sweep_ctable: flushing expired community membership (%.*s in %.*s, origin %.*s, expired %s).",
1229 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1230 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1231 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf,
1232 timespec_to_str(tr_comm_memb_get_expiry(memb)));
1233 tr_comm_table_remove_memb(trps->ctable, memb);
1234 tr_comm_memb_free(memb);
1236 /* This is the first expiration. Note this and reset the expiry time. */
1237 tr_comm_memb_expire(memb);
1238 trps_compute_expiry(trps, tr_comm_memb_get_interval(memb), tr_comm_memb_get_expiry(memb));
1239 tr_debug("trps_sweep_ctable: community membership expired at %s, resetting expiry to %s (%.*s in %.*s, origin %.*s).",
1240 timespec_to_str(&sweep_time),
1241 timespec_to_str(tr_comm_memb_get_expiry(memb)),
1242 tr_comm_memb_get_realm_id(memb)->len, tr_comm_memb_get_realm_id(memb)->buf,
1243 tr_comm_get_id(tr_comm_memb_get_comm(memb))->len, tr_comm_get_id(tr_comm_memb_get_comm(memb))->buf,
1244 tr_comm_memb_get_origin(memb)->len, tr_comm_memb_get_origin(memb)->buf);
1249 /* get rid of any unreferenced realms, etc */
1250 tr_comm_table_sweep(trps->ctable);
1253 talloc_free(tmp_ctx);
1258 static unsigned int trps_metric_add(unsigned int m1, unsigned int m2)
1260 if (trp_metric_is_invalid(m1) || trp_metric_is_invalid(m2))
1261 return TRP_METRIC_INVALID;
1263 if (trp_metric_is_infinite(m1) || trp_metric_is_infinite(m2))
1264 return TRP_METRIC_INFINITY;
1266 if (trp_metric_is_finite(m1+m2))
1269 return TRP_METRIC_INFINITY;
1272 /* convert an rentry into a new trp update info record */
1273 static TRP_INFOREC *trps_route_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1275 TRP_INFOREC *rec=trp_inforec_new(mem_ctx, TRP_INFOREC_TYPE_ROUTE);
1276 unsigned int linkcost=0;
1279 if (trp_route_is_local(route))
1282 linkcost=trp_peer_get_linkcost(trps_get_peer_by_gssname(trps,
1283 trp_route_get_peer(route)));
1286 /* Note that we leave the next hop empty since the recipient fills that in.
1287 * This is where we add the link cost (currently always 1) to the next peer. */
1288 if ((trp_inforec_set_trust_router(rec, trp_route_dup_trust_router(route)) != TRP_SUCCESS)
1289 ||(trp_inforec_set_metric(rec,
1290 trps_metric_add(trp_route_get_metric(route),
1291 linkcost)) != TRP_SUCCESS)
1292 ||(trp_inforec_set_interval(rec, trps_get_update_interval(trps)) != TRP_SUCCESS)) {
1293 tr_err("trps_route_to_inforec: error creating route update.");
1301 static TRP_UPD *trps_route_to_upd(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TRP_ROUTE *route)
1303 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1304 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1305 TRP_INFOREC *rec=NULL;
1308 tr_err("trps_route_to_upd: could not create update message.");
1311 trp_upd_set_realm(upd, trp_route_dup_realm(route));
1312 if (trp_upd_get_realm(upd)==NULL) {
1313 tr_err("trps_route_to_upd: could not copy realm.");
1314 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1317 trp_upd_set_comm(upd, trp_route_dup_comm(route));
1318 if (trp_upd_get_comm(upd)==NULL) {
1319 tr_err("trps_route_to_upd: could not copy comm.");
1320 upd=NULL; /* it's still in tmp_ctx, so it will be freed */
1323 rec=trps_route_to_inforec(tmp_ctx, trps, route);
1325 tr_err("trps_route_to_upd: could not create route info record for realm %.*s in comm %.*s.",
1326 trp_route_get_realm(route)->len, trp_route_get_realm(route)->buf,
1327 trp_route_get_comm(route)->len, trp_route_get_comm(route)->buf);
1328 upd=NULL; /* it's till in tmp_ctx, so it will be freed */
1331 trp_upd_add_inforec(upd, rec);
1334 talloc_steal(mem_ctx, upd);
1337 talloc_free(tmp_ctx);
1341 /* select the correct route to comm/realm to be announced to peer */
1342 static TRP_ROUTE *trps_select_realm_update(TRPS_INSTANCE *trps, TR_NAME *comm, TR_NAME *realm, TR_NAME *peer_gssname)
1346 /* Take the currently selected route unless it is through the peer we're sending the update to.
1347 * I.e., enforce the split horizon rule. */
1348 route=trp_rtable_get_selected_entry(trps->rtable, comm, realm);
1350 /* No selected route, this should only happen if the only route has been retracted,
1351 * in which case we do not want to advertise it. */
1354 tr_debug("trps_select_realm_update: %s vs %s", peer_gssname->buf,
1355 trp_route_get_peer(route)->buf);
1356 if (0==tr_name_cmp(peer_gssname, trp_route_get_peer(route))) {
1357 tr_debug("trps_select_realm_update: matched, finding alternate route");
1358 /* the selected entry goes through the peer we're reporting to, choose an alternate */
1359 route=trps_find_best_route(trps, comm, realm, peer_gssname);
1360 if ((route==NULL) || (!trp_metric_is_finite(trp_route_get_metric(route))))
1361 return NULL; /* don't advertise a nonexistent or retracted route */
1366 /* Add TRP_UPD msgs to the updates GPtrArray. Caller needs to arrange for these to be freed. */
1367 static TRP_RC trps_select_route_updates_for_peer(TALLOC_CTX *mem_ctx,
1369 TRPS_INSTANCE *trps,
1370 TR_NAME *peer_gssname,
1374 TR_NAME **comm=trp_rtable_get_comms(trps->rtable, &n_comm);
1375 TR_NAME **realm=NULL;
1378 TRP_ROUTE *best=NULL;
1384 for (ii=0; ii<n_comm; ii++) {
1385 realm=trp_rtable_get_comm_realms(trps->rtable, comm[ii], &n_realm);
1386 for (jj=0; jj<n_realm; jj++) {
1387 best=trps_select_realm_update(trps, comm[ii], realm[jj], peer_gssname);
1388 /* If we found a route, add it to the list. If triggered!=0, then only
1389 * add triggered routes. */
1390 if ((best!=NULL) && ((!triggered) || trp_route_is_triggered(best))) {
1391 upd=trps_route_to_upd(mem_ctx, trps, best);
1393 tr_err("trps_select_route_updates_for_peer: unable to create update message.");
1396 g_ptr_array_add(updates, upd);
1412 static TRP_INFOREC *trps_memb_to_inforec(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_COMM_MEMB *memb)
1414 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1415 TRP_INFOREC *rec=NULL;
1421 comm=tr_comm_memb_get_comm(memb);
1422 rec=trp_inforec_new(tmp_ctx, TRP_INFOREC_TYPE_COMMUNITY);
1426 if (TRP_SUCCESS!=trp_inforec_set_comm_type(rec, tr_comm_get_type(comm))) {
1431 if (TRP_SUCCESS!=trp_inforec_set_role(rec, tr_comm_memb_get_role(memb))) {
1436 if ((NULL!=tr_comm_get_apcs(comm)) &&
1437 ( (TRP_SUCCESS!=trp_inforec_set_apcs(rec,
1438 tr_apc_dup(rec, tr_comm_get_apcs(comm)))) ||
1439 (NULL==trp_inforec_get_apcs(rec)))) {
1444 if ((NULL!=tr_comm_get_owner_realm(comm)) &&
1445 ( (TRP_SUCCESS!=trp_inforec_set_owner_realm(rec, tr_dup_name(tr_comm_get_owner_realm(comm)))) ||
1446 (NULL==trp_inforec_get_owner_realm(rec)))) {
1451 if ((NULL!=tr_comm_get_owner_contact(comm)) &&
1452 ( (TRP_SUCCESS!=trp_inforec_set_owner_contact(rec, tr_dup_name(tr_comm_get_owner_contact(comm)))) ||
1453 (NULL==trp_inforec_get_owner_contact(rec)))) {
1458 if ((NULL!=tr_comm_memb_get_provenance(memb)) &&
1459 (TRP_SUCCESS!=trp_inforec_set_provenance(rec, tr_comm_memb_get_provenance(memb)))) {
1464 if (TRP_SUCCESS!=trp_inforec_set_interval(rec, trps_get_update_interval(trps))) {
1470 talloc_steal(mem_ctx, rec);
1473 talloc_free(tmp_ctx);
1477 /* construct an update with all the inforecs for comm/realm/role to be sent to peer */
1478 static TRP_UPD *trps_comm_update(TALLOC_CTX *mem_ctx, TRPS_INSTANCE *trps, TR_NAME *peer_gssname, TR_COMM *comm, TR_REALM *realm)
1480 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1481 TRP_UPD *upd=trp_upd_new(tmp_ctx);
1482 TRP_INFOREC *rec=NULL;
1483 TR_COMM_ITER *iter=NULL;
1484 TR_COMM_MEMB *memb=NULL;
1489 trp_upd_set_comm(upd, tr_comm_dup_id(comm));
1490 trp_upd_set_realm(upd, tr_realm_dup_id(realm));
1491 /* leave peer empty */
1493 iter=tr_comm_iter_new(tmp_ctx);
1495 tr_err("trps_comm_update: unable to allocate iterator.");
1500 /* now add inforecs */
1501 switch (realm->role) {
1503 memb=tr_comm_table_find_idp_memb(trps->ctable,
1504 tr_realm_get_id(realm),
1505 tr_comm_get_id(comm));
1508 memb=tr_comm_table_find_rp_memb(trps->ctable,
1509 tr_realm_get_id(realm),
1510 tr_comm_get_id(comm));
1516 for (memb=tr_comm_memb_iter_first(iter, memb);
1518 memb=tr_comm_memb_iter_next(iter)) {
1519 rec=trps_memb_to_inforec(tmp_ctx, trps, memb);
1521 tr_err("trps_comm_update: unable to allocate inforec.");
1525 trp_upd_add_inforec(upd, rec);
1529 if (trp_upd_get_inforec(upd)==NULL)
1530 upd=NULL; /* no inforecs, no reason to send the update */
1532 talloc_steal(mem_ctx, upd); /* success! */
1535 talloc_free(tmp_ctx);
1539 /* Find all community updates to send to a peer and add these as TR_UPD records
1540 * to the updates GPtrArray. */
1541 static TRP_RC trps_select_comm_updates_for_peer(TALLOC_CTX *mem_ctx,
1543 TRPS_INSTANCE *trps,
1544 TR_NAME *peer_gssname,
1547 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1548 TR_COMM_ITER *comm_iter=NULL;
1550 TR_COMM_ITER *realm_iter=NULL;
1551 TR_REALM *realm=NULL;
1553 TRP_RC rc=TRP_ERROR;
1555 /* currently do not send any communities on triggered updates */
1561 comm_iter=tr_comm_iter_new(tmp_ctx);
1562 realm_iter=tr_comm_iter_new(tmp_ctx);
1563 if ((comm_iter==NULL) || (realm_iter==NULL)) {
1564 tr_err("trps_select_comm_updates_for_peer: unable to allocate iterator.");
1569 /* do every community */
1570 for (comm=tr_comm_table_iter_first(comm_iter, trps->ctable);
1572 comm=tr_comm_table_iter_next(comm_iter)) {
1573 /* do every realm in this community */
1574 tr_debug("trps_select_comm_updates_for_peer: looking through community %.*s",
1575 tr_comm_get_id(comm)->len,
1576 tr_comm_get_id(comm)->buf);
1577 for (realm=tr_realm_iter_first(realm_iter, trps->ctable, tr_comm_get_id(comm));
1579 realm=tr_realm_iter_next(realm_iter)) {
1580 /* get the update for this comm/realm */
1581 tr_debug("trps_select_comm_updates_for_peer: adding realm %.*s",
1582 tr_realm_get_id(realm)->len,
1583 tr_realm_get_id(realm)->buf);
1584 upd=trps_comm_update(mem_ctx, trps, peer_gssname, comm, realm);
1586 g_ptr_array_add(updates, upd);
1591 talloc_free(tmp_ctx);
1596 * Filter the inforecs in a single update
1598 * @param filt The filter to apply
1599 * @param upd The update to filter
1601 static void trps_filter_one_outbound_update(TR_FILTER *filt, TRP_UPD *upd)
1603 TRP_INFOREC *this=NULL, *next=NULL;
1604 TR_FILTER_ACTION action=TR_FILTER_ACTION_REJECT;
1605 TR_FILTER_TARGET *target=NULL;
1607 for(this=trp_upd_get_inforec(upd); this!=NULL; this=next) {
1609 target= tr_filter_target_trp_inforec(NULL, upd, this);
1611 /* TODO: signal that filtering failed. Until then, just filter everything and give an error message. */
1612 tr_crit("trps_filter_one_outbound_update: Unable to allocate filter target, cannot apply filter!");
1615 || (TR_FILTER_NO_MATCH==tr_filter_apply(target, filt, NULL, &action))
1616 || (action!=TR_FILTER_ACTION_ACCEPT)) {
1617 /* Either no filter matched or one matched and rejected this record.
1618 * Also filter out record if we were unable to allocate a target. */
1619 trp_upd_remove_inforec(upd, this); /* "this" is now invalid */
1622 tr_filter_target_free(target);
1627 * May shuffle the update list.
1629 * @param filters The filter set for the relevant TRP peer
1630 * @param updates GPtrArray of updates to filter
1632 static void trps_filter_outbound_updates(TR_FILTER_SET *filters, GPtrArray *updates)
1637 /* Walk backward through the array so we can remove elements. Careful about loop
1638 * termination - remember that ii is unsigned. */
1639 for (ii=updates->len; ii>0; ii--) {
1640 upd=g_ptr_array_index(updates, ii-1);
1641 trps_filter_one_outbound_update(tr_filter_set_get(filters, TR_FILTER_TYPE_TRP_OUTBOUND), upd);
1642 /* see if we removed all the records from this update */
1643 if (trp_upd_num_inforecs(upd)==0)
1644 g_ptr_array_remove_index_fast(updates, ii-1); /* does not preserve order at index ii or higher */
1648 /* helper for trps_update_one_peer. Frees the TRP_UPD pointed to by a GPtrArray element */
1649 static void trps_trp_upd_destroy(gpointer data)
1651 trp_upd_free((TRP_UPD *)data);
1654 /* all routes/communities to a single peer, unless comm/realm are specified (both or neither must be NULL) */
1655 static TRP_RC trps_update_one_peer(TRPS_INSTANCE *trps,
1657 TRP_UPDATE_TYPE update_type,
1661 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1662 TR_MSG msg; /* not a pointer! */
1664 TRP_ROUTE *route=NULL;
1667 TRP_RC rc=TRP_ERROR;
1668 TR_NAME *peer_label=trp_peer_get_label(peer);
1669 GPtrArray *updates=g_ptr_array_new_with_free_func(trps_trp_upd_destroy);
1671 if (updates==NULL) {
1672 tr_err("trps_update_one_peer: unable to allocate updates array.");
1677 switch (update_type) {
1678 case TRP_UPDATE_TRIGGERED:
1679 tr_debug("trps_update_one_peer: preparing triggered update for %.*s",
1680 peer_label->len, peer_label->buf);
1682 case TRP_UPDATE_SCHEDULED:
1683 tr_debug("trps_update_one_peer: preparing scheduled update for %.*s",
1684 peer_label->len, peer_label->buf);
1686 case TRP_UPDATE_REQUESTED:
1687 tr_debug("trps_update_one_peer: preparing requested update for %.*s",
1688 peer_label->len, peer_label->buf);
1691 tr_err("trps_update_one_peer: invalid update type requested.");
1696 /* First, gather route updates. */
1697 tr_debug("trps_update_one_peer: selecting route updates for %.*s.", peer_label->len, peer_label->buf);
1698 if ((comm==NULL) && (realm==NULL)) {
1700 rc=trps_select_route_updates_for_peer(tmp_ctx,
1704 update_type==TRP_UPDATE_TRIGGERED);
1705 } else if ((comm!=NULL) && (realm!=NULL)) {
1706 /* a single community/realm was requested */
1707 route=trps_select_realm_update(trps, comm, realm, peer_label);
1709 /* we have no actual update to send back, MUST send a retraction */
1710 tr_debug("trps_update_one_peer: community/realm without route requested, sending mandatory retraction.");
1711 route=trp_route_new(tmp_ctx);
1712 trp_route_set_comm(route, tr_dup_name(comm));
1713 trp_route_set_realm(route, tr_dup_name(realm));
1714 trp_route_set_peer(route, tr_new_name(""));
1715 trp_route_set_metric(route, TRP_METRIC_INFINITY);
1716 trp_route_set_trust_router(route, tr_new_name(""));
1717 trp_route_set_next_hop(route, tr_new_name(""));
1719 upd=trps_route_to_upd(tmp_ctx, trps, route);
1721 tr_err("trps_update_one_peer: unable to allocate route update.");
1725 g_ptr_array_add(updates, upd);
1727 tr_err("trps_update_one_peer: error: only comm or realm was specified. Need both or neither.");
1732 /* Second, gather community updates */
1733 tr_debug("trps_update_one_peer: selecting community updates for %.*s.", peer_label->len, peer_label->buf);
1734 rc=trps_select_comm_updates_for_peer(tmp_ctx, updates, trps, peer_label, update_type==TRP_UPDATE_TRIGGERED);
1736 /* see if we have anything to send */
1737 if (updates->len<=0)
1738 tr_debug("trps_update_one_peer: no updates for %.*s", peer_label->len, peer_label->buf);
1740 /* Apply outbound TRP filters for this peer */
1741 trps_filter_outbound_updates(peer->filters, updates);
1743 if (updates->len<=0)
1744 tr_debug("trps_update_one_peer: no updates for %.*s after filtering.", peer_label->len, peer_label->buf);
1746 tr_debug("trps_update_one_peer: sending %d update messages.", updates->len);
1747 for (ii=0; ii<updates->len; ii++) {
1748 upd = (TRP_UPD *) g_ptr_array_index(updates, ii);
1749 /* now encode the update message */
1750 tr_msg_set_trp_upd(&msg, upd);
1751 encoded = tr_msg_encode(NULL, &msg);
1752 if (encoded == NULL) {
1753 tr_err("trps_update_one_peer: error encoding update.");
1758 tr_debug("trps_update_one_peer: adding message to queue.");
1759 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS)
1760 tr_err("trps_update_one_peer: error queueing update.");
1762 tr_debug("trps_update_one_peer: update queued successfully.");
1764 tr_msg_free_encoded(encoded);
1774 g_ptr_array_free(updates, TRUE); /* frees any TRP_UPD records */
1775 talloc_free(tmp_ctx);
1779 /* all routes/communities to all peers */
1780 TRP_RC trps_update(TRPS_INSTANCE *trps, TRP_UPDATE_TYPE update_type)
1782 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1783 TRP_PTABLE_ITER *iter=trp_ptable_iter_new(tmp_ctx);
1784 TRP_PEER *peer=NULL;
1785 TRP_RC rc=TRP_SUCCESS;
1787 if (trps->ptable==NULL)
1788 return TRP_SUCCESS; /* no peers, nothing to do */
1791 tr_err("trps_update: failed to allocate peer table iterator.");
1792 talloc_free(tmp_ctx);
1796 for (peer=trp_ptable_iter_first(iter, trps->ptable);
1797 (peer!=NULL) && (rc==TRP_SUCCESS);
1798 peer=trp_ptable_iter_next(iter))
1800 if (!trps_peer_connected(trps, peer)) {
1801 TR_NAME *peer_label=trp_peer_get_label(peer);
1802 tr_debug("trps_update: no TRP connection to %.*s, skipping.",
1803 peer_label->len, peer_label->buf);
1806 rc=trps_update_one_peer(trps, peer, update_type, NULL, NULL);
1809 tr_debug("trps_update: rc=%u after attempting update.", rc);
1810 trp_ptable_iter_free(iter);
1811 trp_rtable_clear_triggered(trps->rtable); /* don't re-send triggered updates */
1812 talloc_free(tmp_ctx);
1816 TRP_RC trps_add_route(TRPS_INSTANCE *trps, TRP_ROUTE *route)
1818 trp_rtable_add(trps->rtable, route); /* should return status */
1822 /* steals the peer object */
1823 TRP_RC trps_add_peer(TRPS_INSTANCE *trps, TRP_PEER *peer)
1825 if (trps->ptable==NULL) {
1826 trps->ptable=trp_ptable_new(trps);
1827 if (trps->ptable==NULL)
1830 return trp_ptable_add(trps->ptable, peer);
1833 TRP_PEER *trps_get_peer_by_gssname(TRPS_INSTANCE *trps, TR_NAME *gssname)
1835 if (trps->ptable==NULL)
1838 return trp_ptable_find_gss_name(trps->ptable, gssname);
1841 TRP_PEER *trps_get_peer_by_servicename(TRPS_INSTANCE *trps, TR_NAME *servicename)
1843 if (trps->ptable==NULL)
1846 return trp_ptable_find_servicename(trps->ptable, servicename);
1849 int trps_peer_connected(TRPS_INSTANCE *trps, TRP_PEER *peer)
1851 TRPC_INSTANCE *trpc=trps_find_trpc(trps, peer);
1855 if (trpc_get_status(trpc)==TRP_CONNECTION_UP)
1862 static TRP_RC trps_handle_request(TRPS_INSTANCE *trps, TRP_REQ *req)
1865 TR_NAME *realm=NULL;
1867 tr_debug("trps_handle_request: handling TRP request.");
1869 if (trps_validate_request(trps, req) != TRP_SUCCESS) {
1870 tr_notice("trps_handle_request: received invalid TRP request.");
1874 if (!trp_req_is_wildcard(req)) {
1875 comm=trp_req_get_comm(req);
1876 realm=trp_req_get_realm(req);
1877 tr_debug("trps_handle_request: route for %.*s/%.*s requested.",
1878 comm->len, comm->buf, realm->len, realm->buf);
1880 tr_debug("trps_handle_request: all routes requested.");
1881 /* leave comm/realm NULL */
1883 return trps_update_one_peer(trps,
1884 trps_get_peer_by_gssname(trps, trp_req_get_peer(req)),
1885 TRP_UPDATE_REQUESTED,
1891 TRP_RC trps_handle_tr_msg(TRPS_INSTANCE *trps, TR_MSG *tr_msg)
1893 TRP_RC rc=TRP_ERROR;
1895 switch (tr_msg_get_msg_type(tr_msg)) {
1897 rc=trps_handle_update(trps, tr_msg_get_trp_upd(tr_msg));
1898 if (rc==TRP_SUCCESS) {
1899 rc=trps_update_active_routes(trps);
1900 trps_update(trps, TRP_UPDATE_TRIGGERED); /* send any triggered routes */
1905 rc=trps_handle_request(trps, tr_msg_get_trp_req(tr_msg));
1909 /* unknown error or one we don't care about (e.g., TID messages) */
1914 /* send wildcard route request to a peer */
1915 TRP_RC trps_wildcard_route_req(TRPS_INSTANCE *trps, TR_NAME *peer_servicename)
1917 TALLOC_CTX *tmp_ctx=talloc_new(NULL);
1918 TRP_PEER *peer=trps_get_peer_by_servicename(trps, peer_servicename);
1919 TR_MSG msg; /* not a pointer */
1920 TRP_REQ *req=trp_req_new(tmp_ctx);
1922 TRP_RC rc=TRP_ERROR;
1925 tr_err("trps_wildcard_route_req: unknown peer (%.*s).", peer_servicename->len, peer_servicename->buf);
1929 if ((req==NULL) || (trp_req_make_wildcard(req)!=TRP_SUCCESS)) {
1930 tr_err("trps_wildcard_route_req: unable to create wildcard TRP request.");
1935 tr_msg_set_trp_req(&msg, req);
1936 encoded= tr_msg_encode(NULL, &msg);
1937 if (encoded==NULL) {
1938 tr_err("trps_wildcard_route_req: error encoding wildcard TRP request.");
1943 tr_debug("trps_wildcard_route_req: adding message to queue.");
1944 if (trps_send_msg(trps, peer, encoded) != TRP_SUCCESS) {
1945 tr_err("trps_wildcard_route_req: error queueing request.");
1948 tr_debug("trps_wildcard_route_req: request queued successfully.");
1954 tr_msg_free_encoded(encoded);
1958 talloc_free(tmp_ctx);