1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 /**

    17  @file

    18  @internalComponent

    19 */

    20 

    21 #include <bluetooth/logger.h>

    22 #include <es_prot.h>

    23 #include <bt_subscribe.h>

    24 #include "CBTAddrSubscriber.h"

    25 

    26 #ifdef __FLOG_ACTIVE

    27 _LIT8(KLogComponent, LOG_COMPONENT_PAN_BNEP);

    28 #endif

    29 

    30 CBTAddrSubscriber::CBTAddrSubscriber (TBTDevAddr& aAddr, CBnepLocalDevice& aLocal)

    31         : CActive(EPriorityStandard), iAddr(aAddr), iOwner(aLocal)

    32     {

    33     LOG_FUNC

    34     CActiveScheduler::Add(this);

    35     }

    36 

    37 CBTAddrSubscriber::~CBTAddrSubscriber()

    38     {

    39     LOG_FUNC

    40     Cancel();

    41     }

    42 

    43 /**

    44    Create an address subscriber and queue the first request.

    45    @param aAddr The address to update with published data.

    46    @param aLocal The local device node which will be informed when the device

    47    address changes.

    48 */

    49 CBTAddrSubscriber* CBTAddrSubscriber::NewL (TBTDevAddr& aAddr, CBnepLocalDevice& aLocal)

    50     {

    51     LOG_STATIC_FUNC

    52     CBTAddrSubscriber* self = new(ELeave) CBTAddrSubscriber(aAddr, aLocal);

    53     CleanupStack::PushL(self);

    54     User::LeaveIfError(self->iDevAddrProperty.Attach(KPropertyUidBluetoothCategory, KPropertyKeyBluetoothGetLocalDeviceAddress));

    55 

    56     // Attempt to fetch the device address property and activate the AO subscription on 

    57     // the property so that the upper layers can be notified when it is initialised by 

    58     // the BT stack. If the property hasn't been initialised yet, SyncFetch will 

    59     // return KErrUnderflow. In this context it is alright to ignore that return value.

    60     self->SyncFetch(ETrue);

    61     LOG(_L8("CBTAddrSubscriber requesting notifications"));

    62     CleanupStack::Pop(self);

    63     return self;

    64     }

    65 

    66 /**

    67    Having been notified of a BDADDR change, notify owner if we

    68    have an address at the moment.

    69 */

    70 void CBTAddrSubscriber::RunL ()

    71     {

    72     LOG_FUNC

    73     // Don't plan to restart the active object since the device address

    74     // is unlikely to change after this runs once. However, the AO

    75     // will reactivate if the property could not be fetched

    76     // properly (i.e. err != KErrNone)

    77     TInt err = SyncFetch(); 

    78     if(KErrNone == err)

    79         {

    80         // Notify the upper layers of the address update.

    81         iOwner.BDADDRChanged();

    82         }

    83     else

    84         {

    85         iDevAddrProperty.Subscribe(iStatus);

    86         SetActive();

    87         }

    88     }

    89 

    90 void CBTAddrSubscriber::DoCancel ()

    91     {

    92     LOG_FUNC

    93     iDevAddrProperty.Cancel();

    94     }

    95 

    96 /**

    97    Fetches the device address property synchronously if it exists.

    98    Conditionally queue a request to be notified of future BDADDR changes.

    99    By default, a request is not queued automatically.

   100    @param aRestart specify whether to queue request and schedule the active object. Default is EFalse.

   101    @return KErrUnderflow The property has zero length (i.e. is uninitialised)

   102    @internalComponent

   103 */

   104 TInt CBTAddrSubscriber::SyncFetch (TBool aRestart)

   105     {

   106     LOG_FUNC

   107     TInt retval = KErrNone;

   108     TBuf8<KBTDevAddrSize> addr;

   109     iDevAddrProperty.Get(addr);

   110     if (addr.Length())

   111         {

   112         iAddr = TBTDevAddr(addr);

   113         LOG_BT(_L8("Setting address to %S"), iAddr);

   114         }

   115     else

   116         {

   117         // The property hasn't been initialised yet.

   118         retval = KErrUnderflow;

   119         }

   120 

   121     if(aRestart)

   122         {

   123 		if(retval == KErrNone)

   124 			{

   125 			// The BT stack was already up when BNEP started.  Call the

   126 			// BDADDRChanged method to inform the NIF that the link layer 

   127 			// is up.

   128 			iOwner.BDADDRChanged();

   129 			}

   130 		else

   131 			{

   132 	        // Watch out for any future updates on the property.

   133 	        iDevAddrProperty.Subscribe(iStatus);

   134 	        SetActive();

   135 			}

   136         }

   137     return retval;

   138     }