/*

* Copyright (c) 2006-2007 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:   

*

*/

#include <es_sock.h>

#include "natfwunsaftcprelaypacketfactory.h"

#include "natfwunsafutils.h"

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

// CNATFWUNSAFTcpRelayPacketFactory::NewL

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

//

EXPORT_C CNATFWUNSAFTcpRelayPacketFactory*

    CNATFWUNSAFTcpRelayPacketFactory::NewL()

    {

    CNATFWUNSAFTcpRelayPacketFactory* self =

        CNATFWUNSAFTcpRelayPacketFactory::NewLC();

    CleanupStack::Pop(self);

    return self;

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::NewLC

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

//

EXPORT_C CNATFWUNSAFTcpRelayPacketFactory*

    CNATFWUNSAFTcpRelayPacketFactory::NewLC()

    {

    CNATFWUNSAFTcpRelayPacketFactory* self =

        new (ELeave) CNATFWUNSAFTcpRelayPacketFactory();

    CleanupStack::PushL(self);

    return self;

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::CNATFWUNSAFTcpRelayPacketFactory

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

//

CNATFWUNSAFTcpRelayPacketFactory::CNATFWUNSAFTcpRelayPacketFactory()

    {

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::~CNATFWUNSAFTcpRelayPacketFactory

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

//

EXPORT_C CNATFWUNSAFTcpRelayPacketFactory::~CNATFWUNSAFTcpRelayPacketFactory()

    {

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::MessageLength

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

//

TInt CNATFWUNSAFTcpRelayPacketFactory::MessageLength(

    const TDesC8& aNATFWUNSAFTcpRelayPacket) const

    {

    return CNATFWUNSAFTcpRelayPacket::RelayLength(aNATFWUNSAFTcpRelayPacket);

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::DecodeHeaderLC

// Check that the first byte is 0x02 or 0x03. Otherwise this is not a relay

// packet.

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

//

CNATFWUNSAFTcpRelayPacket* CNATFWUNSAFTcpRelayPacketFactory::DecodeHeaderLC(

    const TDesC8& aNATFWUNSAFTcpRelayPacket) const

    {

    __ASSERT_ALWAYS(

        aNATFWUNSAFTcpRelayPacket.Length() >=

            CNATFWUNSAFTcpRelayPacket::EFrameSize,

                User::Leave(KErrArgument));

    //Last 8 bits are reserved as zeros

    TUint8 relayType = NATFWUNSAFUtils::HighByte( BigEndian::Get16(

        aNATFWUNSAFTcpRelayPacket.Mid(

            CNATFWUNSAFTcpRelayPacket::EFrameTypeOffset).Ptr()));

    __ASSERT_ALWAYS(relayType == CNATFWUNSAFTcpRelayPacket::EFrameTypeStun ||

        relayType == CNATFWUNSAFTcpRelayPacket::EFrameTypeData,

            User::Leave(KErrArgument));

    TUint16 dataLength = BigEndian::Get16(aNATFWUNSAFTcpRelayPacket.Mid(

        CNATFWUNSAFTcpRelayPacket::EFrameLengthOffset).Ptr());

    CNATFWUNSAFTcpRelayPacket* relay = CNATFWUNSAFTcpRelayPacket::CreateL(

        aNATFWUNSAFTcpRelayPacket.Mid(CNATFWUNSAFTcpRelayPacket::EFrameSize,

             dataLength),static_cast<CNATFWUNSAFTcpRelayPacket::TRelayType>

                (relayType));

    CleanupStack::PushL(relay);

    return relay;

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::DecodeL

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

//

EXPORT_C CNATFWUNSAFTcpRelayPacket* CNATFWUNSAFTcpRelayPacketFactory::DecodeL(

    const TDesC8& aNATFWUNSAFTcpRelayPacket) const

    {

    //Decoding the header is all that is needed

    CNATFWUNSAFTcpRelayPacket* relay =

        DecodeHeaderLC(aNATFWUNSAFTcpRelayPacket);

    CleanupStack::Pop(relay);

    return relay;

    }

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

// CNATFWUNSAFTcpRelayPacketFactory::CreateL

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

//

CNATFWUNSAFTcpRelayPacket* CNATFWUNSAFTcpRelayPacketFactory::CreateL(

    const CNATFWUNSAFTcpRelayPacket::TRelayType& aType,

    const TDesC8& aData) const

    {

    return CNATFWUNSAFTcpRelayPacket::CreateL(aData, aType);

    }