| /* | |
| * Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com> | |
| * | |
| * This file is part of Open5GS. | |
| * | |
| * 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 General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| */ | |
| extern "C" { | |
| /* | |
| * OGS_TUN_MAX_HEADROOM(16bytes) | |
| * | |
| * Linux | |
| * - ogs_tun_read(16bytes) | |
| * OGS_GTPV1U_5GC_HEADER_LEN(16bytes) | |
| * - ogs_tun_write(0bytes) | |
| * No Need for headroom | |
| * | |
| * Mac OS X | |
| * - ogs_tun_read(12bytes) | |
| * OGS_GTPV1U_5GC_HEADER_LEN(16bytes) - Null/Loopback(4bytes) | |
| * - ogs_tun_write(4bytes) | |
| * Null/Loopback(4bytes) | |
| * | |
| * So, we'll just use 12bytes. | |
| */ | |
| ogs_socket_t ogs_tun_open(char *ifname, int maxlen, int is_tap); | |
| int ogs_tun_set_ip(char *ifname, ogs_ipsubnet_t *gw, ogs_ipsubnet_t *sub); | |
| ogs_pkbuf_t *ogs_tun_read(ogs_socket_t fd, ogs_pkbuf_pool_t *packet_pool); | |
| int ogs_tun_write(ogs_socket_t fd, ogs_pkbuf_t *pkbuf); | |
| } | |