diff -r d3e8e7d462dd -r f92a4f87e424 usbmgmt/usbmgr/device/classdrivers/ncm/classimplementation/ncmpktdrv/pktdrv/inc/ncmdatainterface.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbmgmt/usbmgr/device/classdrivers/ncm/classimplementation/ncmpktdrv/pktdrv/inc/ncmdatainterface.h	Tue Aug 31 17:01:47 2010 +0300
@@ -0,0 +1,115 @@
+/*
+* Copyright (c) 2010 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:
+*
+*/
+
+/**
+@file
+@internalComponent
+*/
+
+#ifndef NCMDATAINTERFACE_H
+#define NCMDATAINTERFACE_H
+
+#include <e32base.h>
+#ifndef __OVER_DUMMYUSBSCLDD__
+#include <nifmbuf.h>
+#include <networking/ethinter.h>
+#include <d32usbcsc.h>
+#else
+#include <dummyusbsclddapi.h>
+#include <usb/testncm/ethinter.h>
+#endif
+
+#include "ncmpktdrvcommon.h"
+
+class    CNcmDataSender;
+class    CNcmDataReceiver;
+
+/**
+The interface to NCM data channel.
+*/
+NONSHARABLE_CLASS(MNcmDataObserver)
+{
+public:
+    /**
+    Process received datagram parsed from NCM.
+    @param[in]   aPacket, contains the datagram(ethernet frame) to be dealed with.
+    */
+    virtual void ProcessReceivedDatagram(RMBufPacket& aPacket) = 0;
+    /**
+    Notify the upper layer(TCP/IP stack) to continue to send data.
+    */
+    virtual void ResumeSending() = 0;
+    /**
+    Notify unrecoverable error in data channel.
+    */
+    virtual void DataError(TInt aError) = 0;
+    /**
+    Notify the Data Interface's alt-setting changes, which commonly from 0 to 1, or vice versa.
+    @param[in]   aIfAltSet, the alt-setting number.
+    */
+    virtual void HandleAltSetting(TInt aIfAltSet) = 0;
+};
+
+/**
+Maintain the logic of Ncm data channel
+*/
+NONSHARABLE_CLASS(CNcmDataInterface) : public CActive
+    {
+public:
+    static CNcmDataInterface* NewL(MNcmDataObserver& aEngine, RDevUsbcScClient& aLdd);
+    ~CNcmDataInterface();
+
+    inline TBool IsStarted() const;
+    void Start();
+    void Stop();
+    TInt Send(RMBufChain& aPacket);
+
+    TInt GetSpeed(TInt& aSpeed);
+    TInt GetNtbInputSize(TDes8& aSize);
+    TInt SetNtbInputSize(TDesC8& aSize);
+    TInt GetNtbParam(TDes8& aParam);
+    TInt SetInEpBufferSize(TUint aSize);
+
+    void ActivateLdd();
+    inline void DataError(TInt aErroCode) const;
+    inline void ResumeSending() const;
+    inline void ProcessDatagram(RMBufPacket& aPacket) const;
+    inline TInt AltSetting() const;
+
+private:
+    CNcmDataInterface(MNcmDataObserver& aEngine, RDevUsbcScClient& aLdd);
+    void ConstructL();
+
+    //From CActive
+    void RunL();
+    void DoCancel();
+
+private:
+    TBool               iStarted;
+    CNcmDataSender*     iSender;
+    CNcmDataReceiver*   iReceiver;
+    MNcmDataObserver&   iEngine;
+
+    RDevUsbcScClient&   iLdd;
+    TInt                iAltSetting;
+    TUint               iIfState;
+    };
+
+// inline functions
+#include "ncmdatainterface.inl"
+
+#endif // NCMDATAINTERFACE_H