// 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:

// loop6.cpp - loopback interface for IPv6

//

#include "in_fmly.h"

#include "loop6.h"

#include <in_iface.h>	// KSoIf*

#include "networkinfo.h"

CIfLoop6::CIfLoop6()

{

	__DECLARE_NAME(_S("CIfLoop6"));

}

void CIfLoop6::ConstructL(const TDesC& aTag)

{

	iIfaceName = aTag.AllocL();

	iIfaceMTU = 4096;

	TCallBack scb(SendCallBack, this);

	iSendCallBack = new(ELeave) CAsyncCallBack(scb, KInet6DefaultPriority);

	TCallBack rcb(RecvCallBack, this);

	iRecvCallBack = new(ELeave) CAsyncCallBack(rcb, KInet6DefaultPriority);

}

CIfLoop6::~CIfLoop6()

{

	iRecvQ.Free();

	iSendQ.Free();

	delete iRecvCallBack;

	delete iSendCallBack;

	delete iIfaceName;

}

CIfLoop6* CIfLoop6::NewL(const TDesC& aTag)

{

	CIfLoop6* p = new(ELeave) CIfLoop6;

	CleanupStack::PushL(p);

	p->ConstructL(aTag);

	CleanupStack::Pop();

	return p;

}

void CIfLoop6::BindL(TAny* aId)

{

	iNetwork = (CProtocolBase*)aId;

	iNetwork->StartSending((CProtocolBase *)this);

}

TInt CIfLoop6::State()

{

	return EIfUp;

}

TInt CIfLoop6::Control(TUint aLevel, TUint aName, TDes8& aOption, TAny*)

	{

	if (aLevel == KSOLInterface)

		{

		switch (aName)

			{

			case KSoIfInfo6:

				{

				__ASSERT_DEBUG(STATIC_CAST(TUint, aOption.MaxLength()) >= sizeof (TSoIfInfo6), User::Panic(_L("LOOP6"), 0));

				if (STATIC_CAST(TUint, aOption.MaxLength()) < sizeof (TSoIfInfo6))

					return KErrArgument;

				TSoIfInfo6& opt = *(TSoIfInfo6*)aOption.Ptr();

				opt.iRMtu = iIfaceMTU;

				}

				// FALL THROUGH AS TSoIfInfo6 IS AN EXTENSION OF TSoIfInfo

			case KSoIfInfo:

				{

				__ASSERT_DEBUG(STATIC_CAST(TUint, aOption.MaxLength()) >= sizeof (TSoIfInfo), User::Panic(_L("LOOP6"), 0));

				if (STATIC_CAST(TUint, aOption.MaxLength()) < sizeof (TSoIfInfo))

					return KErrArgument;

				TSoIfInfo& opt = *(TSoIfInfo*)aOption.Ptr();

				opt.iFeatures = KIfIsLoopback | KIfCanMulticast;

				opt.iMtu = iIfaceMTU;

				opt.iSpeedMetric = 30000;

				opt.iName = *iIfaceName;

				return KErrNone;

				}

			case KSoIfConfig:

				// PS: If KSoIfConfig returns KErrNotSupported, Update6 does not proceed

				// with setting routes, etc.

				{

				  TSoInet6IfConfig& cfg = *(TSoInet6IfConfig*)aOption.Ptr();	

				  if (!iIfaceName->Compare(_L("loop6")) && cfg.iFamily == KAfInet6)

				    {

				      TSockAddr unspec(KAFUnspec);

				      cfg.iLocalId = unspec;

				      cfg.iRemoteId = unspec;

				      return KErrNone;

				    }

				}

				break;

			case KSoIfGetConnectionInfo:

				{

				if (STATIC_CAST(TUint, aOption.MaxLength()) < sizeof(TSoIfConnectionInfo))

					return KErrArgument;

				TSoIfConnectionInfo &opt = *(TSoIfConnectionInfo *)aOption.Ptr();

				opt.iIAPId = 0;

				opt.iNetworkId = 0;

				return KErrNone;

				}

			default:

				break;

			}

		}

	return KErrNotSupported;

}

void CIfLoop6::Info(TNifIfInfo& aInfo) const

{

	aInfo.iVersion = TVersion(KInet6MajorVersionNumber, KInet6MinorVersionNumber, KInet6BuildVersionNumber);

	aInfo.iFlags = KNifIfIsBase | KNifIfCreatedAlone;

	aInfo.iName = *iIfaceName;

	aInfo.iProtocolSupported = KProtocolInet6Ip;

}

TInt CIfLoop6::Send(RMBufChain &aPacket, TAny*)

{

	iSendQ.Append(aPacket);

	iSendCallBack->CallBack();

	return 1;

}

TInt CIfLoop6::RecvCallBack(TAny* aCProtocol)

{

	((CIfLoop6*)aCProtocol)->DoProcess();

	return 0;

}

TInt CIfLoop6::SendCallBack(TAny* aCProtocol)

{

	((CIfLoop6*)aCProtocol)->DoSend();

	return 0;

}

void CIfLoop6::DoSend()

{

	RMBufPacket send;

	RMBufPacket recv;

	while (iSendQ.Remove(send))

	{

		send.Unpack();

		Loop(send, recv);

		iRecvQ.Append(recv);

		iRecvCallBack->CallBack();

		send.Free();

	}

}

void CIfLoop6::DoProcess()

{

	RMBufPacket packet;

	while (iRecvQ.Remove(packet))

	{

		iNetwork->Process(packet, (CProtocolBase*)this);

	}

}

void CIfLoop6::Loop(RMBufPacket& aSend, RMBufPacket& aRecv)

{

	RMBufPktInfo* info = aSend.Info();

	info->iProtocol = KProtocolInet6Loop;

	aSend.SetInfo(NULL);

	aRecv.Assign(aSend);

	aRecv.SetInfo(info);

	aRecv.Pack();

}