Neels Hofmeyr | c8a614d | 2015-09-24 17:32:30 +0200 | [diff] [blame^] | 1 | /* GTP Hub Implementation */ |
| 2 | |
| 3 | /* (C) 2015 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * gtphub_ext.c -- ext means extern. This file is kept separate so that these |
| 7 | * functions can be wrapped for gtphub_test.c. When a function and its callers |
| 8 | * are in the same compilational unit, the wrappability may be optimized away. |
| 9 | * |
| 10 | * Author: Neels Hofmeyr |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Affero General Public License as published by |
| 14 | * the Free Software Foundation; either version 3 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Affero General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Affero General Public License |
| 23 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include <openbsc/gtphub.h> |
| 29 | #include <osmocom/core/utils.h> |
| 30 | |
| 31 | #define __llist_first(head) (((head)->next == (head)) ? NULL : (head)->next) |
| 32 | #define llist_first(head, type, entry) llist_entry(__llist_first(head), type, entry) |
| 33 | |
| 34 | int gtphub_resolve_ggsn_addr(struct gtphub *hub, |
| 35 | struct osmo_sockaddr *result, |
| 36 | struct gtp_packet_desc *p) |
| 37 | { |
| 38 | /* TODO This is just hardcodedly returning the first known address. |
| 39 | * Should resolve from actual subscriber data. */ |
| 40 | struct gtphub_peer *peer = llist_first(&hub->to_ggsns[GTPH_PLANE_CTRL].peers, |
| 41 | struct gtphub_peer, entry); |
| 42 | if (!peer) |
| 43 | return -1; |
| 44 | |
| 45 | struct gtphub_peer_addr *pa = llist_first(&peer->addresses, |
| 46 | struct gtphub_peer_addr, entry); |
| 47 | if (!pa) |
| 48 | return -1; |
| 49 | |
| 50 | struct gtphub_peer_port *pp = llist_first(&pa->ports, |
| 51 | struct gtphub_peer_port, entry); |
| 52 | if (!pp) |
| 53 | return -1; |
| 54 | |
| 55 | *result = pp->sa; |
| 56 | return 0; |
| 57 | } |
| 58 | |