1 /*

     2 * Copyright (c) 2006 - 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:    Sends keepalive messages to TURN Client in order to keep

    15 *                allocation in TURN Server alive

    16 *

    17 */

    18 

    19 

    20 

    21 

    22 #ifndef C_NATFWTURNREFRESHTIMER_H

    23 #define C_NATFWTURNREFRESHTIMER_H

    24 

    25 #include <e32base.h>

    26 

    27 class MNATFWRefreshObserver;

    28 

    29 /**

    30  *  Sends keepalive messages to TURN Client.

    31  *

    32  *  Sends keepalive messages to TURN Client in order to keep

    33  *  allocation in TURN Server alive. Gets interval in microseconds from 

    34  *  CNATFWTurnPlugin. 

    35  *

    36  *  @lib turnplugin.lib

    37  *  @since S60 v3.2

    38  */

    39 class CNATFWTurnRefreshTimer : public CActive

    40     {

    41 public:

    42 

    43     /**

    44      * Creates a new instance of NAT FW TURN Refresh Timer.

    45      *

    46      * @since S60 v3.2

    47      * @param aObserver Observer for callbacks to timer's user

    48      * @return A new instance, ownership is transferred.

    49      */

    50     static CNATFWTurnRefreshTimer* NewL( MNATFWRefreshObserver&aObserver );

    51     

    52     /**

    53      * Creates a new instance of NAT FW TURN Refresh Timer and

    54      * pushes it to CleanupStack.

    55      *

    56      * @since S60 v3.2

    57      * @param aObserver Observer for callbacks to timer's user

    58      * @return A new instance, ownership is transferred.

    59      */    

    60     static CNATFWTurnRefreshTimer* NewLC( MNATFWRefreshObserver&aObserver );

    61 

    62     ~CNATFWTurnRefreshTimer();

    63 

    64     /**

    65      * Waits for given time (aInterval) and calls SetActive().

    66      * If interval is 0, timer is cancelled.

    67      *

    68      * @since S60 v3.2

    69      * @param aInterval Interval in microseconds

    70      */

    71     void StartTurnRefresh( TUint aInterval );

    72 

    73     /**

    74      * Client can query if refresh is going on.

    75      *

    76      * @since S60 v3.2

    77      * @return ETrue if refreshing

    78      */

    79     TBool IsRunning() const;

    80 

    81 protected:

    82 

    83     /**

    84      * from CActive

    85      */

    86     void RunL();

    87     

    88     /**

    89      * from CActive

    90      */

    91     void DoCancel();

    92 

    93 private:

    94 

    95     CNATFWTurnRefreshTimer( MNATFWRefreshObserver&aObserver );

    96 

    97     void ConstructL();

    98 

    99 private: // data

   100 

   101     /**

   102      * Interval in microseconds

   103      */

   104     TUint iInterval;

   105 

   106     /**

   107      * Asynchronous timer service.

   108      */

   109     RTimer iTimer;

   110     

   111     /**

   112      * MNATFWRefreshObserver reference.

   113      */

   114     MNATFWRefreshObserver& iObserver;

   115 

   116     };

   117 

   118 #endif // C_NATFWTURNREFRESHTIMER_H