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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 methods 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) 2007-2014 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 as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* 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/>.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#define _GNU_SOURCE
#include "datatypes.h"
#include "keyexchange.h"
#include "log.h"
int keyexchange_init(keyexchange_t* kx, const char* path_control, const char* path_data)
{
if(!kx)
return -1;
int ret = unixdomain_init(&(kx->control_interface_), path_control);
if(ret) return ret;
ret = unixdomain_init(&(kx->data_interface_), path_data);
if(ret)
unixdomain_close(&(kx->control_interface_));
return ret;
}
int keyexchange_fill_fd_set(keyexchange_t* kx, fd_set* read, fd_set* write)
{
return unixdomain_fill_fd_set(&(kx->data_interface_), read);
// ignoreing writes and control interface for now
}
void keyexchange_close(keyexchange_t* kx)
{
unixdomain_close(&(kx->control_interface_));
unixdomain_close(&(kx->data_interface_));
}
static int keyexchange_handle_read(keyexchange_t* kx, fd_set* readyfds)
{
if(FD_ISSET(kx->data_interface_.server_fd_, readyfds)) {
int old_fd = kx->data_interface_.client_fd_;
if(unixdomain_accept(&(kx->data_interface_))) {
return -1;
}
if(old_fd != kx->data_interface_.client_fd_) {
log_printf(INFO, "key exchange: new client");
}
}
if(FD_ISSET(kx->data_interface_.client_fd_, readyfds)) {
u_int8_t buf[100];
int len = unixdomain_read(&(kx->data_interface_), buf, sizeof(buf));
if(len < 0) {
log_printf(ERROR, "key exchange: client error!!!!!");
} if(!len) {
log_printf(INFO, "key exchange: client disconnected");
kx->data_interface_.client_fd_ = -1;
} else {
buf[len] = 0;
log_printf(DEBUG, "key exchange: received string '%s'", buf);
unixdomain_write(&(kx->data_interface_), buf, len);
}
}
return 0;
}
/* static int keyexchange_handle_write(keyexchange_t* kx, fd_set* readyfds) */
/* { */
/* // TODO: implement this */
/* return 0; */
/* } */
int keyexchange_handle(keyexchange_t* kx, fd_set* rreadyfds, fd_set* wreadyfds)
{
return keyexchange_handle_read(kx, rreadyfds);
// ignoreing writes for now
}
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