/* $Id: portfwd.h 82968 2020-02-04 10:35:17Z vboxsync $ */
/** @file
 * NAT Network - port-forwarding rules, definitions and declarations.
 */

/*
 * Copyright (C) 2013-2020 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 */

#ifndef VBOX_INCLUDED_SRC_NAT_portfwd_h
#define VBOX_INCLUDED_SRC_NAT_portfwd_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif

#ifndef RT_OS_WINDOWS
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#endif

#include "lwip/ip_addr.h"


struct fwspec {
    int sdom;                   /* PF_INET, PF_INET6 */
    int stype;                  /* SOCK_STREAM, SOCK_DGRAM */

    /* listen on */
    union {
        struct sockaddr sa;
        struct sockaddr_in sin;   /* sdom == PF_INET  */
        struct sockaddr_in6 sin6; /* sdom == PF_INET6 */
    } src;

    /* forward to */
    union {
        struct sockaddr sa;
        struct sockaddr_in sin;   /* sdom == PF_INET  */
        struct sockaddr_in6 sin6; /* sdom == PF_INET6 */
    } dst;
};


void portfwd_init(void);
int portfwd_rule_add(struct fwspec *);
int portfwd_rule_del(struct fwspec *);


int fwspec_set(struct fwspec *, int, int,
               const char *, uint16_t,
               const char *, uint16_t);

int fwspec_equal(struct fwspec *, struct fwspec *);

void fwtcp_init(void);
void fwudp_init(void);

void fwtcp_add(struct fwspec *);
void fwtcp_del(struct fwspec *);
void fwudp_add(struct fwspec *);
void fwudp_del(struct fwspec *);

int fwany_ipX_addr_set_src(ipX_addr_t *, const struct sockaddr *);

#endif /* !VBOX_INCLUDED_SRC_NAT_portfwd_h */