88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
|
|
* 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/>.
|
|
*/
|
|
|
|
#include "ogs-tun.h"
|
|
|
|
#undef OGS_LOG_DOMAIN
|
|
#define OGS_LOG_DOMAIN __ogs_sock_domain
|
|
|
|
ogs_pkbuf_t *ogs_tun_read(ogs_socket_t fd, ogs_pkbuf_pool_t *packet_pool)
|
|
{
|
|
ogs_pkbuf_t *recvbuf = NULL;
|
|
int n;
|
|
|
|
ogs_assert(fd != INVALID_SOCKET);
|
|
|
|
recvbuf = ogs_pkbuf_alloc(packet_pool, OGS_MAX_PKT_LEN);
|
|
ogs_assert(recvbuf);
|
|
ogs_pkbuf_reserve(recvbuf, OGS_TUN_MAX_HEADROOM);
|
|
ogs_pkbuf_put(recvbuf, OGS_MAX_PKT_LEN-OGS_TUN_MAX_HEADROOM);
|
|
|
|
n = ogs_read(fd, recvbuf->data, recvbuf->len);
|
|
if (n <= 0) {
|
|
ogs_log_message(OGS_LOG_WARN, ogs_socket_errno, "ogs_read() failed");
|
|
ogs_pkbuf_free(recvbuf);
|
|
return NULL;
|
|
}
|
|
|
|
ogs_pkbuf_trim(recvbuf, n);
|
|
|
|
#if defined(__APPLE__)
|
|
/* Remove Null/Loopback Header (4bytes) */
|
|
ogs_pkbuf_pull(recvbuf, 4);
|
|
#endif
|
|
|
|
return recvbuf;
|
|
}
|
|
|
|
int ogs_tun_write(ogs_socket_t fd, ogs_pkbuf_t *pkbuf)
|
|
{
|
|
#if defined(__APPLE__)
|
|
uint8_t version;
|
|
uint32_t family;
|
|
#endif
|
|
|
|
ogs_assert(fd != INVALID_SOCKET);
|
|
ogs_assert(pkbuf);
|
|
|
|
#if defined(__APPLE__)
|
|
version = (*((unsigned char *)pkbuf->data) >> 4) & 0xf;
|
|
|
|
if (version == 4) {
|
|
family = htobe32(AF_INET);
|
|
} else if (version == 6) {
|
|
family = htobe32(AF_INET6);
|
|
} else {
|
|
ogs_error("Invalid packet [IP version:%d, Packet Length:%d]",
|
|
version, pkbuf->len);
|
|
ogs_log_hexdump(OGS_LOG_ERROR, pkbuf->data, pkbuf->len);
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
ogs_pkbuf_push(pkbuf, sizeof(family));
|
|
memcpy(pkbuf->data, &family, sizeof(family));
|
|
#endif
|
|
|
|
if (ogs_write(fd, pkbuf->data, pkbuf->len) <= 0) {
|
|
ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno, "ogs_write() failed");
|
|
return OGS_ERROR;
|
|
}
|
|
|
|
return OGS_OK;
|
|
}
|