--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/localconnectivityservice/dun/plugins/inc/usb/DunUsbListen.h	Tue Aug 31 16:03:15 2010 +0300
@@ -0,0 +1,168 @@
+/*
+* Copyright (c) 2006-2007 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:  DUN USB plugin's listener
+*
+*/
+
+
+#ifndef C_CDUNUSBLISTEN_H
+#define C_CDUNUSBLISTEN_H
+
+#include <e32std.h>
+#include <c32comm.h>
+#include <usbman.h>
+#include "DunPlugin.h"
+
+enum TUsbListenState
+    {
+    EUsbListenStateIdle,
+    EUsbListenStateListening
+    };
+
+/**
+ *  DUN USB plugin's listener class
+ *  This class starts listening for USB device state to change to configured.
+ *  When change to configured is detected, parent (CDunUsbPlugin) is notified
+ *  to create a channel. Also when device state is no longer configured,
+ *  parent (CDunUsbPlugin) is notified to remove a channel.
+ *
+ *  @lib dunusb.lib
+ *  @since S60 v3.2
+ */
+NONSHARABLE_CLASS( CDunUsbListen ) : public CActive
+    {
+
+public:
+
+    /**
+     * Two-phased constructor.
+     * @param aServer Server
+     * @param aParent Creator of this instance
+     * @param aUsbServer USB server
+     * @return Instance of self
+     */
+    static CDunUsbListen* NewL( MDunServerCallback* aServer,
+                                MDunListenCallback* aParent,
+                                RUsb& aUsbServer );
+
+    /**
+    * Destructor.
+    */
+    virtual ~CDunUsbListen();
+
+    /**
+     * Resets data to initial values
+     *
+     * @since S60 3.2
+     * @return None
+     */
+    void ResetData();
+
+    /**
+     * IssueRequest to USB server for device state change notifications
+     *
+     * @return KErrAlreadyExists if device state configured,
+     *         KErrNone otherwise
+     */
+    TInt IssueRequestL();
+
+    /**
+     * Stops listening
+     *
+     * @since S60 3.2
+     * @return Symbian error code on error, KErrNone otherwise
+     */
+    TInt Stop();
+
+private:
+
+    CDunUsbListen( MDunServerCallback* aServer,
+                   MDunListenCallback* aParent,
+                   RUsb& aUsbServer );
+
+    void ConstructL();
+
+    /**
+     * Initializes this class
+     *
+     * @since S60 3.2
+     * @return None
+     */
+    void Initialize();
+
+    /**
+     * Activates listening request
+     *
+     * @since S60 3.2
+     * @return KErrNotReady if already active, KErrNone otherwise
+     */
+    TInt Activate();
+
+// from base class CActive
+
+    /**
+     * From CActive.
+     * Called when read or write operation is ready.
+     *
+     * @since S60 3.2
+     * @return None
+     */
+    void RunL();
+
+    /**
+     * From CActive.
+     * Cancel current activity.
+     *
+     * @return None
+     */
+    void DoCancel();
+
+private:  // data
+
+    /**
+     * Callback to call when notification via MDunServerCallback to be made
+     * Not own.
+     */
+    MDunServerCallback* iServer;
+
+    /**
+     * Callback to call when notification via MDunListenCallback to be made
+     * Not own.
+     */
+    MDunListenCallback* iParent;
+
+    /**
+     * Current state of listening: active or inactive
+     */
+    TUsbListenState iListenState;
+
+    /**
+     * USB server (USB manager) needed for device state notifications
+     * Device states needed to create transporter channel
+     */
+    RUsb& iUsbServer;
+
+    /**
+     * Device state of USB set when RUsb::DeviceStateNotification completes
+     */
+    TUsbDeviceState iDeviceState;
+
+    /**
+     * Previous state of USB set when RUsb::DeviceStateNotification completes
+     */
+    TUsbDeviceState iDeviceStatePrev;
+
+    };
+
+#endif  // C_CDUNUSBLISTEN_H