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59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef OGS_TUN_H
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#define OGS_TUN_H
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#include "proto/ogs-proto.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* OGS_TUN_MAX_HEADROOM(16bytes)
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*
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* Linux
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* - ogs_tun_read(16bytes)
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* OGS_GTPV1U_5GC_HEADER_LEN(16bytes)
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* - ogs_tun_write(0bytes)
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* No Need for headroom
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*
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* Mac OS X
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* - ogs_tun_read(12bytes)
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* OGS_GTPV1U_5GC_HEADER_LEN(16bytes) - Null/Loopback(4bytes)
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* - ogs_tun_write(4bytes)
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* Null/Loopback(4bytes)
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*
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* So, we'll just use 12bytes.
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*/
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#define OGS_TUN_MAX_HEADROOM 16
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ogs_socket_t ogs_tun_open(char *ifname, int maxlen, int is_tap);
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int ogs_tun_set_ip(char *ifname, ogs_ipsubnet_t *gw, ogs_ipsubnet_t *sub);
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ogs_pkbuf_t *ogs_tun_read(ogs_socket_t fd, ogs_pkbuf_pool_t *packet_pool);
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int ogs_tun_write(ogs_socket_t fd, ogs_pkbuf_t *pkbuf);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OGS_TUN_H */
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