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/* GTP Hub Implementation */
/* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
* All Rights Reserved
*
* gtphub_ext.c -- ext means extern. This file is kept separate so that these
* functions can be wrapped for gtphub_test.c. When a function and its callers
* are in the same compilational unit, the wrappability may be optimized away.
*
* Author: Neels Hofmeyr
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <openbsc/gtphub.h>
#include <osmocom/core/utils.h>
#define __llist_first(head) (((head)->next == (head)) ? NULL : (head)->next)
#define llist_first(head, type, entry) llist_entry(__llist_first(head), type, entry)
int gtphub_resolve_ggsn_addr(struct gtphub *hub,
struct osmo_sockaddr *result,
struct gtp_packet_desc *p)
{
/* TODO This is just hardcodedly returning the first known address.
* Should resolve from actual subscriber data. */
struct gtphub_peer *peer = llist_first(&hub->to_ggsns[GTPH_PLANE_CTRL].peers,
struct gtphub_peer, entry);
if (!peer)
return -1;
struct gtphub_peer_addr *pa = llist_first(&peer->addresses,
struct gtphub_peer_addr, entry);
if (!pa)
return -1;
struct gtphub_peer_port *pp = llist_first(&pa->ports,
struct gtphub_peer_port, entry);
if (!pp)
return -1;
*result = pp->sa;
return 0;
}
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