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/*
* uAnytun
*
* uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
* featured implementation uAnytun has no support for multiple connections
* or synchronisation. It is a small single threaded implementation intended
* to act as a client on small platforms.
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org>
*
* This file is part of uAnytun.
*
* uAnytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* uAnytun 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 uAnytun. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TUN_H_
#define _TUN_H_
#include <stdlib.h>
enum device_type_enum { TYPE_UNDEF, TYPE_TUN, TYPE_TAP };
typedef enum device_type_enum device_type_t;
struct tun_device_struct {
int fd_;
unsigned int with_pi_;
char* actual_name_;
device_type_t type_;
u_int16_t mtu_;
char* net_addr_;
char* net_mask_;
u_int16_t prefix_length_;
};
typedef struct tun_device_struct tun_device_t;
int tun_init(tun_device_t* dev, const char* dev_name, const char* dev_type, const char* ifcfg_addr, u_int16_t ifcfg_prefix);
int tun_init_post(tun_device_t* dev);
void tun_do_ifconfig(tun_device_t* dev);
void tun_close(tun_device_t* dev);
int tun_read(tun_device_t* dev, u_int8_t* buf, u_int32_t len);
int tun_write(tun_device_t* dev, u_int8_t* buf, u_int32_t len);
// in tun_helper.h
void tun_conf(tun_device_t* dev, const char* dev_name, const char* dev_type, const char* ifcfg_addr, u_int16_t ifcfg_prefix, u_int16_t mtu);
int tun_fix_return(int ret, size_t pi_length);
const char* tun_get_type_string(tun_device_t* dev);
#endif
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