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/* $Id: commonrdr.h,v 1.17 2025/04/03 21:11:34 nanard Exp $ */
/* MiniUPnP project
* (c) 2006-2025 Thomas Bernard
* http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
* This software is subject to the conditions detailed
* in the LICENCE file provided within the distribution */
#ifndef COMMONRDR_H_INCLUDED
#define COMMONRDR_H_INCLUDED
/*! \file commonrdr.h
* \brief common API for all backends
*/
#include "config.h"
/* init and shutdown functions */
/*! \brief init the backend
* \return 0=OK, -1=error
*/
int
init_redirect(void);
/*! \brief shutdown the backend */
void
shutdown_redirect(void);
/*!
* \param[in] ifname external interface name
* \return -1 for error or the number of redirection rules
*/
int
get_redirect_rule_count(const char * ifname);
/*! \brief get port mapping by external port and protocol
* \param[in] ifname WAN interface name
* \param[in] eport external port
* \param[in] proto IPPROTO_TCP/IPPROTO_UDP/etc.
* \return 0 on success, -1 on error or rule not found */
int
get_redirect_rule(const char * ifname, unsigned short eport, int proto,
char * iaddr, int iaddrlen, unsigned short * iport,
char * desc, int desclen,
char * rhost, int rhostlen,
unsigned int * timestamp,
u_int64_t * packets, u_int64_t * bytes);
/*! \brief get port mapping by index
* \param[in] index
* \return 0 on success, -1 on error or rule not found */
int
get_redirect_rule_by_index(int index,
char * ifname, unsigned short * eport,
char * iaddr, int iaddrlen, unsigned short * iport,
int * proto, char * desc, int desclen,
char * rhost, int rhostlen,
unsigned int * timestamp,
u_int64_t * packets, u_int64_t * bytes);
/*! \brief get "external" ports for which there is a mapping
* \param[in] startport start of port range
* \param[in] endport end of port range
* \param[in] proto IPPROTO_TCP/IPPROTO_UDP/etc.
* \param[out] size of the returned array
* \return an (malloc'ed) array */
unsigned short *
get_portmappings_in_range(unsigned short startport, unsigned short endport,
int proto, unsigned int * number);
/*! \brief update the port mapping internal port, description and timestamp
* \param[in] ifname WAN interface name
* \param[in] eport external port
* \param[in] proto IPPROTO_TCP/IPPROTO_UDP/etc.
* \param[in] iport internal port to set
* \param[in] desc new description to set
* \param[in] timestamp new end of port mapping timestamp to set
* \return 0 on success, -1 on failure */
int
update_portmapping(const char * ifname, unsigned short eport, int proto,
unsigned short iport, const char * desc,
unsigned int timestamp);
/*! \brief update the port mapping description and timestamp
* \param[in] ifname WAN interface name
* \param[in] eport external port
* \param[in] proto IPPROTO_TCP/IPPROTO_UDP/etc.
* \param[in] desc new description to set
* \param[in] timestamp new end of port mapping timestamp to set
* \return 0 on success, -1 on failure */
int
update_portmapping_desc_timestamp(const char * ifname,
unsigned short eport, int proto,
const char * desc, unsigned int timestamp);
#if defined(USE_NETFILTER)
/*
* only provided by nftables implementation at the moment.
* Should be implemented for iptables too, for consistency
*/
typedef enum {
RDR_TABLE_NAME,
RDR_NAT_TABLE_NAME,
RDR_NAT_PREROUTING_CHAIN_NAME,
RDR_NAT_POSTROUTING_CHAIN_NAME,
RDR_FORWARD_CHAIN_NAME,
RDR_FAMILY_SPLIT,
} rdr_name_type;
/*
* used by the config file parsing in the core
* to set
*/
int set_rdr_name( rdr_name_type param, const char * string );
#endif
#endif
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