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/*
* �Anytun
*
* �Anytun is a tiny implementation of SATP. Unlike Anytun which is a full
* featured implementation �Anytun 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 �Anytun.
*
* �Anytun 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.
*
* �Anytun 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 �Anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#include "datatypes.h"
#include "tun.h"
#include "tun_helper.h"
#include "log.h"
void tun_init(tun_device_t** dev, const char* dev_name, const char* dev_type, const char* ifcfg_lp, const char* ifcfg_rnmp)
{
if(!dev)
return;
*dev = malloc(sizeof(tun_device_t));
if(!*dev)
return;
tun_conf(*dev, dev_name, dev_type, ifcfg_lp, ifcfg_rnmp, 1400);
if(ifcfg_lp && ifcfg_rnmp)
tun_do_ifconfig(*dev);
}
void tun_init_post(tun_device_t* dev)
{
// nothing yet
}
void tun_close(tun_device_t** dev)
{
if(!dev || !(*dev))
return;
if((*dev)->fd_ > 0)
close((*dev)->fd_);
if((*dev)->actual_name_)
free((*dev)->actual_name_);
if((*dev)->local_)
free((*dev)->local_);
if((*dev)->remote_netmask_)
free((*dev)->remote_netmask_);
free(*dev);
*dev = NULL;
}
int tun_read(tun_device_t* dev, u_int8_t* buf, u_int32_t len)
{
/* if(!dev || dev->fd_ < 0) */
/* return -1; */
/* if(dev->with_pi_) */
/* { */
/* struct iovec iov[2]; */
/* struct tun_pi tpi; */
/* iov[0].iov_base = &tpi; */
/* iov[0].iov_len = sizeof(tpi); */
/* iov[1].iov_base = buf; */
/* iov[1].iov_len = len; */
/* return(tun_fix_return(readv(dev->fd_, iov, 2), sizeof(tpi))); */
/* } */
/* else */
/* return(read(dev->fd_, buf, len)); */
return -1;
}
int tun_write(tun_device_t* dev, u_int8_t* buf, u_int32_t len)
{
/* if(!dev || dev->fd_ < 0) */
/* return -1; */
/* if(dev->with_pi_) */
/* { */
/* struct iovec iov[2]; */
/* struct tun_pi tpi; */
/* struct iphdr *hdr = (struct iphdr *)buf; */
/* tpi.flags = 0; */
/* if(hdr->version == 4) */
/* tpi.proto = htons(ETH_P_IP); */
/* else */
/* tpi.proto = htons(ETH_P_IPV6); */
/* iov[0].iov_base = &tpi; */
/* iov[0].iov_len = sizeof(tpi); */
/* iov[1].iov_base = buf; */
/* iov[1].iov_len = len; */
/* return(tun_fix_return(writev(dev->fd_, iov, 2), sizeof(tpi))); */
/* } */
/* else */
/* return(write(dev->fd_, buf, len)); */
return -1;
}
void tun_do_ifconfig(tun_device_t* dev)
{
/* if(!dev || !dev->actual_name_ || !dev->local_ || !dev->remote_netmask_) */
/* return; */
/* char* command = NULL; */
/* if(dev->type_ == TYPE_TUN) */
/* asprintf(&command, "/sbin/ifconfig %s %s pointopoint %s mtu %d", dev->actual_name_, dev->local_, dev->remote_netmask_, dev->mtu_); */
/* else */
/* asprintf(&command, "/sbin/ifconfig %s %s netmask %s mtu %d", dev->actual_name_, dev->local_, dev->remote_netmask_, dev->mtu_); */
/* if(!command) { */
/* log_printf(ERR, "Execution of ifconfig failed"); */
/* return; */
/* } */
/* int result = system(command); */
/* if(result == -1) */
/* log_printf(ERR, "Execution of ifconfig failed"); */
/* else */
/* log_printf(NOTICE, "ifconfig returned %d", WEXITSTATUS(result)); */
/* free(command); */
}
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