// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// addr46.cpp - an extention to TIp6Addr

//

#include "addr46.h"

static const union {TUint8 a[4]; TUint32 b;} v4Prefix = { {0, 0, 0xff, 0xff} };

//

// TIp46Addr::TIp46Addr

// ********************

// Construct TIp6Addr as IPv4 mapped address from IPv4 address

//

TIp46Addr::TIp46Addr(const TUint32 aAddr)

	{

	u.iAddr32[0] = 0;

	u.iAddr32[1] = 0;

	u.iAddr32[2] = v4Prefix.b;

	u.iAddr8[15] = (TUint8)aAddr;

	u.iAddr8[14] = (TUint8)(aAddr >>  8);

	u.iAddr8[13] = (TUint8)(aAddr >> 16);

	u.iAddr8[12] = (TUint8)(aAddr >> 24);

	}

//

// Construct TIp6Adr from generic TInetAddr,

//

TIp46Addr::TIp46Addr(const TInetAddr &aAddr)

	{

	if (aAddr.Family() == KAfInet6)

		(*(TIp6Addr *)this) = aAddr.Ip6Address();

	else if (aAddr.Family() == KAfInet)

		(*(TIp6Addr *)this) = TIp46Addr(aAddr.Address());

	else

		(*(TIp6Addr *)this) = KInet6AddrNone;

	}

//

// TIp46Addr::IsMulticast

// **********************

// Return TRUE if address is IPv4 or IPv6 multicast

//

TBool TIp46Addr::IsMulticast() const

	{

	// TRUE, if real IPv6 multicast

	if (TIp6Addr::IsMulticast())

		return TRUE;

	//

	// Otherwise, return TRUE, if address is the IPv4

	// multicast address.

	return

		u.iAddr32[0] == 0 &&

		u.iAddr32[1] == 0 &&

		u.iAddr32[2] == v4Prefix.b &&

		(u.iAddr8[12] & 0xF0) == 0xE0;

	}

//

// TIp46Addr::IsLinklocal

// **********************

// Return TRUE if address is IPv4 or IPv6 multicast

//

TBool TIp46Addr::IsLinkLocal() const

	{

	return Scope() == KIp6AddrScopeLinkLocal;

	}

// TIp46Addr::IsUnspecified

// ************************

TBool TIp46Addr::IsUnspecified() const

	{

	return

		u.iAddr32[0] == 0 &&

		u.iAddr32[1] == 0 &&

		(u.iAddr32[2] == 0 || u.iAddr32[2] == v4Prefix.b) &&

		u.iAddr32[3] == 0;

	}