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// Copyright (C) 2004-2008 TintaDigital - STI, LDA.
//
// This program 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 2 of the License, or
// (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// As a special exception to the GNU General Public License, permission is
// granted for additional uses of the text contained in its release
// of Common C++.
//
// The exception is that, if you link the Common C++ library with other files
// to produce an executable, this does not by itself cause the
// resulting executable to be covered by the GNU General Public License.
// Your use of that executable is in no way restricted on account of
// linking the Common C++ library code into it.
//
// This exception does not however invalidate any other reasons why
// the executable file might be covered by the GNU General Public License.
//
// This exception applies only to the code released under the
// name Common C++. If you copy code from other releases into a copy of
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way. To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
/**
* @file nat.h
* @short Network Address Translation interface functions.
* @author Ricardo Gameiro <rgameiro at tintadigital dot com>
**/
#ifndef CCXX_NAT_H
#define CCXX_NAT_H
#ifdef CCXX_NAMESPACES
namespace ost {
#endif
#ifndef WIN32
typedef int SOCKET;
#endif
enum natResult {
natOK = 0,
natSearchErr = 1,
natNotSupported = 2,
natDevUnavail = 3,
natSocknameErr = 4,
natPeernameErr = 5,
natSockTypeErr = 6,
natIFaceErr = 7,
natUnkownErr = 8
};
typedef natResult natResult;
/**
* Perform NAT address table lookup for the current socket.
*
* @param sfd socket to get nat info from.
* @param nat sockaddr structure to hold results.
*/
natResult natv4Lookup( SOCKET sfd, struct sockaddr_in * nat );
#ifdef CCXX_IPV6
natResult natv6Lookup( SOCKET sfd, struct sockaddr_in6 * nat );
#endif
/**
* Return descriptive text for the NAT Lookup return error.
*
* @param res result from NATLookup function.
* @return error description.
*/
const char * natErrorString( natResult res );
#ifdef CCXX_NAMESPACES
}
#endif
#endif
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