diff -r 7d48bed6ce0c -r 987c9837762f phoneclientserver/phoneserver/Inc/Ussd/CUssdExtensionInterface.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phoneclientserver/phoneserver/Inc/Ussd/CUssdExtensionInterface.h	Wed Sep 01 12:15:03 2010 +0100
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2002-2005 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:  Extends the ussd functionality.
+ *
+ */
+#ifndef __CUSSDEXTENSIONINTERFACE_H__
+#define __CUSSDEXTENSIONINTERFACE_H__
+
+// INCLUDES
+
+#include<ecom\ecom.h>
+#include<etelmm.h>
+#include<ussdinterfaceconstants.hrh>
+// FORWARD DECLARATIONS
+
+// CONSTANTS
+const TUid KUssdExtensionInterfaceUid =
+    {
+    KUssdExtensionInterfaceUidValue
+    };
+
+// CLASS DECLARATION
+
+/**
+ *  Base class for Ussd Extension Plugin.
+ *
+ *  This API allows customizing the USSD sending feature of the S60 Telephony 
+ *  applications at runtime.
+ *
+ *  The API defines two roles:
+ *  1) Validates the USSD string while sending. if it is unauthorized 
+ *  in the context shall terminate the request.
+ *  2) Validates the USSD string while receiving, the extension will get the first chance to consume the reply if needed
+ *
+ *
+ *  Note:
+ *  The customizer needs only one plug-in implementation for a variant, and so supports only rom-only plug-in.
+ */
+class CUssdExtensionInterface : public CBase
+    {
+public:
+    // Constructors and destructor
+    /**
+     * NewL
+     * Wraps ECom object instantitation. Will return the
+     * default interface implementation, which matches to
+     * given aOperationName.
+     */
+    static CUssdExtensionInterface* NewL();
+
+    /**
+     * NewL
+     * Wraps ECom object instantitation. Will search for
+     * interface implementation, which matches to given
+     * aOperationName.
+     * @param aOperationName name of requested implementation.
+     * Implementations advertise their "name" as specified
+     * in their resource file field
+     * IMPLEMENTATION_INFO::default_data.
+     */
+    static CUssdExtensionInterface* NewL(const TDesC8& aMatch);
+
+public:
+    // API to be implemented by ECOM plug-in
+
+    /**
+     * Validate/Authenticate the Ussd string Before Sending from
+     * the USSD Send handler
+     * When Ussd Extention plugin return true, then ussd manager will continue sending of the ussd
+     * Otherwise the transaction will be terminated with KErrAccessDenined 
+     *
+     * @param aMessageData  
+     * @param aMessageAttributes .
+     */
+    virtual TBool
+            ValidateUssdMsgSending(
+                    const TDesC8& aMessageData,
+                    const RMobileUssdMessaging::TMobileUssdAttributesV1& aMsgAttribute) = 0;
+    /**
+     * Validate/Authenticate the Ussd response received by the 
+     * USSD receive handler
+     *
+     * @param aMessageData  
+     * @return true implies that the ussd response is valid for the extension.
+     * otherwise pass it to the observer. .
+     */
+    virtual TBool ValidateUssdResponse(const TDesC8& aMessage) = 0;
+    /**
+     * if ValidateUssdResponse returns true, then the extension plugin is waiting for the response 
+     * so invoke the interface to deligate to the plugin.
+     * Example:
+     * ...
+     *  TBool isValidForExtension = iUssdExtnInterface->ValidateUssdResponse(aMsgData);
+     *  TInt errfromextension = KErrNone;
+     *  if (isValidForExtension)
+     *     {
+     *     TRAPD(err, iUssdExtnInterface->ProcessReceivedUssdL(iDecodedMessage, errfromextension));
+     *     ...
+     *     
+     * @param aMessageData  
+     * @return error code
+     * @leave On typical leave level problems. 
+     */
+    virtual void
+            ProcessReceivedUssdL(const TDesC& aMessageData, TInt aError) = 0;
+
+    /**
+     * Notify the any network error to the extension, so that it can handle the internal states if required
+     * @param aError 
+     */
+    virtual void NotifyNWError(TInt aError)=0;
+
+public:
+    /**
+     * ~CUssdExtensionInterface
+     *
+     * Cleans up resources, specifically notify ECOM server that this
+     * instance is being deleted.
+     */
+    virtual ~CUssdExtensionInterface();
+
+private:
+    TUid iDtor_ID_Key; // Identification on cleanup
+    };
+#include "CUssdExtensionInterface.inl"    
+#endif // __CUSSDEXTENSIONINTERFACE_H__