// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

// which accompanies this distribution, and is available

// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

/**

 @file

 @internalTechnology

 @released

*/

#ifndef CS_API_EXT_H

#define CS_API_EXT_H

#include <es_sock.h>

#include <comms-infras/api_ext_list.h>

#include <comms-infras/trbuf.h>

class CCommsApiExtReqMsg;

class CCommsApiExtRespMsg;

class RCommsApiExtensionBase

/**

Base class for Comms API extensions.

@internalTechnology

@released

*/

	{

protected:

	IMPORT_C explicit RCommsApiExtensionBase();

	IMPORT_C TInt Open(RCommsSubSession& aExtensionProvider, TSupportedCommsApiExt aInterfaceId);

	IMPORT_C void Close();

	IMPORT_C void SendRequest(CCommsApiExtReqMsg& aRequestMsg, TDes8& aResponseBuf, TRequestStatus& aStatus);

	IMPORT_C void SendMessage(CCommsApiExtReqMsg& aRequestMsg);

protected:

	RCommsSubSession iSubSession;

	TSupportedCommsApiExt iInterfaceId;

private:

	RPointerArray<Elements::TRBuf8> iBuffers;

	};

template<TSupportedCommsApiExt T>

class RCommsApiExtension : public RCommsApiExtensionBase

/**

Comms API extensions template. New extension APIs may derive from this template.

@internalTechnology

@released

*/

	{

public:

	inline TInt Open(RCommsSubSession& aExtensionProvider);

	};

template<TSupportedCommsApiExt T>

TInt RCommsApiExtension<T>::Open(RCommsSubSession& aExtensionProvider)

	{

	return RCommsApiExtensionBase::Open(aExtensionProvider,T);

	}

#endif // CS_API_EXT_H