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/*
* Transparent proxy support for Linux/iptables
*
* Copyright (c) 2002-2004 BalaBit IT Ltd.
* Author: Balzs Scheidler
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef _IP_TPROXY_H
#define _IP_TPROXY_H
#ifdef __KERNEL__
#include <linux/types.h>
#include <linux/in.h>
#else
#include <netinet/in.h>
#ifndef IP_RECVORIGADDRS
#define IP_RECVORIGADDRS 11273
#define IP_ORIGADDRS IP_RECVORIGADDRS
struct in_origaddrs {
struct in_addr ioa_srcaddr;
struct in_addr ioa_dstaddr;
unsigned short int ioa_srcport;
unsigned short int ioa_dstport;
};
#endif
#endif
/*
* used in setsockopt(SOL_IP, IP_TPROXY) should not collide
* with values in <linux/in.h>
*/
#define IP_TPROXY 11274
/* tproxy operations */
enum {
TPROXY_VERSION = 0,
TPROXY_ASSIGN,
TPROXY_UNASSIGN,
TPROXY_QUERY,
TPROXY_FLAGS,
TPROXY_ALLOC,
TPROXY_CONNECT
};
/* bitfields in IP_TPROXY_FLAGS */
#define ITP_CONNECT 0x00000001
#define ITP_LISTEN 0x00000002
#define ITP_ESTABLISHED 0x00000004
#define ITP_ONCE 0x00010000
#define ITP_MARK 0x00020000
#define ITP_APPLIED 0x00040000
#define ITP_UNIDIR 0x00080000
struct in_tproxy_addr{
struct in_addr faddr;
u_int16_t fport;
};
struct in_tproxy {
/* fixed part, should not change between versions */
u_int32_t op;
/* extensible part */
union _in_args {
u_int32_t version;
struct in_tproxy_addr addr;
u_int32_t flags;
} v;
};
#endif
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