// 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:

// Name        : 6to4_listener.cpp

// Part of     : 6to4 plugin / 6to4.prt

// Implements 6to4 automatic and configured tunnels, see

// RFC 3056 & RFC 2893

// Version     : 0.2

//

// INCLUDE FILES

#include <inet6log.h>

#include <in6_opt.h>

#include "6to4_listener.h"

// EXTERNAL DATA STRUCTURES

// EXTERNAL FUNCTION PROTOTYPES  

// CONSTANTS

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================= LOCAL FUNCTIONS ==============================

// ----------------------------------------------------------------------------

// UpdateAddress

// ----------------------------------------------------------------------------

static void UpdateAddress(MInterfaceManager &aIfMgr, const TIp6Addr &aAddr, TBool aDelete)

	{

	// Add or delete address to/from 6to4 interface

	TPckgBuf<TSoInet6InterfaceInfo> opt;

	TSoInet6InterfaceInfo &inf = opt();

	inf.iName = K6to4;

	inf.iDoState = 0;

	inf.iDoId = 1;

	inf.iDoPrefix = 0;

	inf.iDoAnycast = 0;

	inf.iDoProxy = 0;

	inf.iAlias = 0;

	inf.iDelete = aDelete;

	inf.iAddress.SetAddress(aAddr);

	inf.iDefGate.SetFamily(0);

	inf.iNetMask.SetFamily(0);

	inf.iNameSer1.SetFamily(0);

	inf.iNameSer2.SetFamily(0);

	inf.iMtu = 0;

	inf.iSpeedMetric = 0;

	const TInt res = aIfMgr.SetOption(KSolInetIfCtrl, KSoInetConfigInterface, opt);

#ifdef _LOG

	_LIT(KDelete, "Deleted");

	_LIT(KAdded,  "Added");

	TBuf<70> tmp;

	inf.iAddress.Output(tmp);

	Log::Printf(_L("%S 6to4 address %S (result=%d)"), aDelete ? &KDelete() : &KAdded(), &tmp, res);

#else

	(void)res;	// (silence unused warning)

#endif

	}

// ============================ MEMBER FUNCTIONS ==============================

C6to4Listener::C6to4Listener (MNetworkService *const aNetwork, MEventService &aService) :

	 CBase (), iNetwork(aNetwork), iService(aService)

	{

	// Register the listener to get the events when addresses are added/deleted

	// to/from an interface.

	iService.RegisterListener (this, EClassAddress);

	}

C6to4Listener::~C6to4Listener()

	{

	// Unregister the listener to not get the events anymore when addresses

	// are added/deleted to/from an interface.

	iService.RemoveListener (this);

	}

// ----------------------------------------------------------------------------

// C6to4Listener::Notify

// Notification handler. Handles interface address addings and deletions.

// 

// ----------------------------------------------------------------------------

//

void C6to4Listener::Notify (TUint aEventClass, TUint aEventType,

							const void *aData)

	{

	if (aEventClass == EClassAddress)

		{

		TInetAddressInfo *info = (TInetAddressInfo *) aData;

		if (info->iPrefixLen != 0 || !info->iAddress.IsV4Mapped())

			// Only interested in IPv4 addressess

			return;

		const TBool remove = aEventType == EventTypeDelete;

		if (!remove && aEventType != EventTypeAdd)

			return;

		// Only Delete or Add events processed

		// Build the ip address for the 6to4 virtual interface

		// and just for automatic tunnels, since the 6to4 address

		// for each interface IPv4 address has to be known by the 

		// system for it to accept the packet.

		TIp6Addr addr;

		addr.u.iAddr8[0] = 0x20;

		addr.u.iAddr8[1] = 0x02;

		addr.u.iAddr8[2] = info->iAddress.u.iAddr8[12];

		addr.u.iAddr8[3] = info->iAddress.u.iAddr8[13];

		addr.u.iAddr8[4] = info->iAddress.u.iAddr8[14];

		addr.u.iAddr8[5] = info->iAddress.u.iAddr8[15];

		addr.u.iAddr8[6] = 0;

		addr.u.iAddr8[7] = 0;

		addr.u.iAddr8[8] = 0;

		addr.u.iAddr8[9] = 0;

		addr.u.iAddr8[10] = 0;

		addr.u.iAddr8[11] = 0;

		addr.u.iAddr8[12] = 0;

		addr.u.iAddr8[13] = 0;

		addr.u.iAddr8[14] = 0;

		addr.u.iAddr8[15] = 1;

		UpdateAddress(*NetworkService ()->Interfacer (), addr, remove);

		}

	}

// ========================== OTHER EXPORTED FUNCTIONS ========================

//  End of File