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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) 2007-2016 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.
*/
#ifndef UANYTUN_udp_h_INCLUDED
#define UANYTUN_udp_h_INCLUDED
#include "options.h"
#include <sys/types.h>
#include <sys/socket.h>
typedef struct {
socklen_t len_;
struct sockaddr_storage addr_;
} udp_endpoint_t;
struct udp_socket_struct {
int fd_;
unsigned int idx_;
udp_endpoint_t local_end_;
udp_endpoint_t remote_end_;
int remote_end_set_;
struct udp_socket_struct* next_;
};
typedef struct udp_socket_struct udp_socket_t;
struct udp_struct {
udp_socket_t* socks_;
udp_socket_t* active_sock_;
int rail_mode_;
};
typedef struct udp_struct udp_t;
int udp_init(udp_t* sock, const char* local_addr, const char* port, resolv_addr_type_t resolv_type, int rail_mode);
int udp_fill_fd_set(udp_t* sock, fd_set* set);
int udp_has_remote(udp_t* sock);
int udp_resolv_remote(udp_t* sock, const char* remote_addr, const char* port, resolv_addr_type_t resolv_type);
void udp_update_remote(udp_t* sock, int fd, udp_endpoint_t* remote);
void udp_close(udp_t* sock);
char* udp_endpoint_to_string(udp_endpoint_t* e);
int udp_read(udp_t* sock, int fd, u_int8_t* buf, u_int32_t len, udp_endpoint_t* remote_end);
int udp_write(udp_t* sock, u_int8_t* buf, u_int32_t len);
#endif
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