1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 #ifndef CNATBINDINGREFRESHER_H

    19 #define CNATBINDINGREFRESHER_H

    20 

    21 //  INCLUDES

    22 #include <e32base.h>

    23 #include <es_sock.h>

    24 #include <securesocket.h>

    25 

    26 // FORWARD DECLARATIONS

    27 class MNATBindingRefresherObserver;

    28 

    29 // CLASS DECLARATION

    30 /**

    31 * A base class for refreshing NAT bindings.

    32 */

    33 class CNATBindingRefresher : public CBase

    34     {

    35     public:  // Constructors and destructor

    36 

    37         virtual ~CNATBindingRefresher();

    38 

    39     public: // New functions

    40 

    41         virtual TBool PersistentConnectionRequired() const;

    42 

    43         virtual TBool HasSocket( const RSocket& aSocket ) const = 0;

    44 

    45         virtual TBool HasSocket( const CSecureSocket& aSocket ) const;

    46 

    47         void SetRefresh( TBool aRefresh );

    48 

    49         void ContinueRefreshing();

    50 

    51         TBool IsRefreshed() const;

    52 

    53     public: // A callback for CDeltaTimer

    54 

    55         static TInt RefreshTimerExpired( TAny* aPtr );

    56 

    57     protected: // Constructors

    58 

    59         CNATBindingRefresher(

    60             CDeltaTimer& aDeltaTimer,

    61             MNATBindingRefresherObserver& aObserver );

    62 

    63     protected: // New functions

    64 

    65         virtual TInt RefreshInterval() = 0;

    66 

    67         virtual void RefreshTimerExpiredL() = 0;

    68 

    69         virtual void CancelRefresh() = 0;

    70 

    71     private: // New functions

    72 

    73         void StartTimer();

    74         void RefreshNow();

    75 

    76     protected: // Data

    77 

    78         MNATBindingRefresherObserver& iObserver;

    79 

    80     private: // Data

    81 

    82         CDeltaTimer& iDeltaTimer;

    83         TCallBack iDeltaTimerCallBack;

    84         TDeltaTimerEntry iDeltaTimerEntry;

    85         TBool iIsRefreshed;

    86         TBool iTimerRunning;

    87     };

    88 

    89 #endif // CNATBINDINGREFRESHER_H

    90 

    91 // End of File