/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_framework.hxx"
#include <helper/networkdomain.hxx>

namespace framework
{

#ifdef WNT
//_________________________________________________________________________________________________________________
//	Windows
//_________________________________________________________________________________________________________________

#define UNICODE
#if defined _MSC_VER
#pragma warning(push, 1)
#endif
#include <windows.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif

//_________________________________________________________________________________________________________________
//	Win NT, Win 2000, Win XP
//_________________________________________________________________________________________________________________

static DWORD WINAPI GetUserDomainW_NT( LPWSTR lpBuffer, DWORD nSize )
{
	return GetEnvironmentVariable( TEXT("USERDOMAIN"), lpBuffer, nSize );
}

//_________________________________________________________________________________________________________________
//	Win 9x,Win ME
//_________________________________________________________________________________________________________________

static DWORD WINAPI GetUserDomainW_WINDOWS( LPWSTR lpBuffer, DWORD nSize )
{
	HKEY	hkeyLogon;
	HKEY	hkeyWorkgroup;
	DWORD	dwResult = 0;


	if ( ERROR_SUCCESS  == RegOpenKeyEx( 
		HKEY_LOCAL_MACHINE, 
		TEXT("Network\\Logon"), 
		0, KEY_READ, &hkeyLogon ) ) 
	{
		DWORD	dwLogon = 0;
		DWORD	dwLogonSize = sizeof(dwLogon);
		RegQueryValueEx( hkeyLogon, TEXT("LMLogon"), 0, NULL, (LPBYTE)&dwLogon, &dwLogonSize );
		RegCloseKey( hkeyLogon );

		if ( dwLogon )
		{
			HKEY	hkeyNetworkProvider;

			if ( ERROR_SUCCESS  == RegOpenKeyEx( 
				HKEY_LOCAL_MACHINE, 
				TEXT("SYSTEM\\CurrentControlSet\\Services\\MSNP32\\NetworkProvider"), 
				0, KEY_READ, &hkeyNetworkProvider ) )
			{
				DWORD	dwBufferSize = nSize;
				LONG	lResult = RegQueryValueEx( hkeyNetworkProvider, TEXT("AuthenticatingAgent"), 0, NULL, (LPBYTE)lpBuffer, &dwBufferSize );

				if ( ERROR_SUCCESS == lResult || ERROR_MORE_DATA == lResult )
					dwResult = dwBufferSize / sizeof(TCHAR);

				RegCloseKey( hkeyNetworkProvider );
			}
		}
	}
	else if ( ERROR_SUCCESS == RegOpenKeyEx(
		HKEY_LOCAL_MACHINE,
		TEXT("SYSTEM\\CurrentControlSet\\Services\\VxD\\VNETSUP"),
		0, KEY_READ, &hkeyWorkgroup ) )
	{
		DWORD	dwBufferSize = nSize;
		LONG	lResult = RegQueryValueEx( hkeyWorkgroup, TEXT("Workgroup"), 0, NULL, (LPBYTE)lpBuffer, &dwBufferSize );

		if ( ERROR_SUCCESS == lResult || ERROR_MORE_DATA == lResult )
			dwResult = dwBufferSize / sizeof(TCHAR);

		RegCloseKey( hkeyWorkgroup );
	}


	return dwResult;
}

static rtl::OUString GetUserDomain()
{
	sal_Unicode	aBuffer[256];

	long	nVersion = GetVersion();
	DWORD	nResult;

	if ( nVersion < 0 )
		nResult = GetUserDomainW_WINDOWS( reinterpret_cast<LPWSTR>(aBuffer), sizeof( aBuffer ) );
	else
		nResult = GetUserDomainW_NT( reinterpret_cast<LPWSTR>(aBuffer), sizeof( aBuffer ) );
	
	if ( nResult > 0 )
		return rtl::OUString( aBuffer );
	else
		return rtl::OUString();
}

//_________________________________________________________________________________________________________________
//	Windows
//_________________________________________________________________________________________________________________

rtl::OUString NetworkDomain::GetYPDomainName()
{
	return ::rtl::OUString();
}

rtl::OUString NetworkDomain::GetNTDomainName()
{
	return GetUserDomain();
}

#elif defined( UNIX )

#include <rtl/ustring.h>
#include <stdlib.h>
#include <errno.h>
#include <osl/thread.h>

//_________________________________________________________________________________________________________________
//	Unix
//_________________________________________________________________________________________________________________

#if defined( SOLARIS )

//_________________________________________________________________________________________________________________
//	Solaris
//_________________________________________________________________________________________________________________

#include <sys/systeminfo.h>
#include <sal/alloca.h>

static rtl_uString *getDomainName()
{
	/* Initialize and assume failure */
	rtl_uString	*ustrDomainName = NULL; 
	
	char	szBuffer[256];
	
	long	nCopied = sizeof(szBuffer);
	char	*pBuffer = szBuffer;
	long	nBufSize;
	
	do
	{
		nBufSize = nCopied;
		nCopied = sysinfo( SI_SRPC_DOMAIN, pBuffer, nBufSize );	
	
		/*	If nCopied is greater than buffersize we need to allocate
			a buffer with suitable size */
		
		if ( nCopied > nBufSize )
			pBuffer = (char *)alloca( nCopied );
		
	} while ( nCopied > nBufSize );

	if ( -1 != nCopied 	)
	{
		rtl_string2UString( 
			&ustrDomainName,
			pBuffer, 
			nCopied - 1, 
			osl_getThreadTextEncoding(), 
			OSTRING_TO_OUSTRING_CVTFLAGS );
	}
	
	return ustrDomainName;
}

#elif defined( LINUX ) /* endif SOLARIS */

//_________________________________________________________________________________________________________________
//	Linux
//_________________________________________________________________________________________________________________

#include <unistd.h>
#include <string.h>

static rtl_uString *getDomainName()
{
	/* Initialize and assume failure */
	rtl_uString	*ustrDomainName = NULL; 
	
	char	*pBuffer;
	int		result;
	size_t	nBufSize = 0;
	
	do
	{
		nBufSize += 256; /* Increase buffer size by steps of 256 bytes */
		pBuffer = (char *)alloca( nBufSize );
		result = getdomainname( pBuffer, nBufSize );
		/* If buffersize in not large enough -1 is returned and errno
		is set to EINVAL. This only applies to libc. With glibc the name
		is truncated. */
	} while ( -1 == result && EINVAL == errno );
	
	if ( 0 == result )
	{
		rtl_string2UString( 
			&ustrDomainName,
			pBuffer, 
			strlen( pBuffer ), 
			osl_getThreadTextEncoding(), 
			OSTRING_TO_OUSTRING_CVTFLAGS );
	}
	
	return ustrDomainName;
}

#else /* LINUX */ 

//_________________________________________________________________________________________________________________
//	Other Unix
//_________________________________________________________________________________________________________________

static rtl_uString *getDomainName()
{
	return NULL;
}

#endif

//_________________________________________________________________________________________________________________
//	Unix
//_________________________________________________________________________________________________________________

rtl::OUString NetworkDomain::GetYPDomainName()
{
	rtl_uString* pResult = getDomainName(); 
	if ( pResult )
		return rtl::OUString( pResult );
	else
		return rtl::OUString();
}

rtl::OUString NetworkDomain::GetNTDomainName()
{
	return ::rtl::OUString();
}

#else /* UNIX */

//_________________________________________________________________________________________________________________
//	Other operating systems (non-Windows and non-Unix)
//_________________________________________________________________________________________________________________

rtl::OUString NetworkDomain::GetYPDomainName()
{
	return rtl::OUString();
}

rtl::OUString NetworkDomain::GetNTDomainName()
{
	return rtl::OUString();
}

#endif

} // namespace framework