diff -r 666f914201fb -r 2fe1408b6811 epoc32/include/comms-infras/cs_api_ext.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epoc32/include/comms-infras/cs_api_ext.h	Tue Mar 16 16:12:26 2010 +0000
@@ -0,0 +1,76 @@
+// 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