serviceadvertiser.cpp

symbian系统下

/*
* ============================================================================
*  Name     : CServiceAdvertiser from ServiceAdvertiser.h
*  Part of  : BluetoothPMPExample
*  Created  : 06.06.2006 by Forum Nokia
*  Implementation notes:
*     Initial content was generated by Series 60 AppWizard.
*  Version  :
*  Copyright: Nokia Corporation
* ============================================================================
*/

// INCLUDE FILES
#include <btmanclient.h>
#include "ServiceAdvertiser.h"

// see https://www.bluetooth.org/foundry/assignnumb/document/service_discovery
static const TInt KBTSerialClassID = 0x1101;

// service name and description for our service
_LIT(KBTServiceName, "BTpmp");
_LIT(KBTServiceDesc, "BTpmp");


CServiceAdvertiser* CServiceAdvertiser::NewL()
	{
	CServiceAdvertiser* self = CServiceAdvertiser::NewLC();
    CleanupStack::Pop(self);
	return self;
	}


CServiceAdvertiser* CServiceAdvertiser::NewLC()
	{
	CServiceAdvertiser* self = new (ELeave) CServiceAdvertiser();
	CleanupStack::PushL(self);
	self->ConstructL();
	return self;
	}


void CServiceAdvertiser::ConstructL()
	{
	}


// ----------------------------------------------------------------------------
// CServiceAdvertiser::CServiceAdvertiser()
//
// constructor
// ----------------------------------------------------------------------------
CServiceAdvertiser::CServiceAdvertiser():
	iRecord(0),
	iRecordState(0)
	{
	}


// ----------------------------------------------------------------------------
// CServiceAdvertiser::~CServiceAdvertiser()
//
// destructor
// ----------------------------------------------------------------------------
CServiceAdvertiser::~CServiceAdvertiser()
	{
	TRAPD(err,StopAdvertiserL());
	}



// ----------------------------------------------------------------------------
// CServiceAdvertiser::StartAdvertiserL(TInt aChannel)
//
// start service advertiser on given channel.  an entry to service discovery
// database will be entered describing our advertised service.
// ----------------------------------------------------------------------------
void CServiceAdvertiser::StartAdvertiserL(TInt aChannel)
	{
	// open sdp session
	User::LeaveIfError(iSdp.Connect());
	// open sdp database session
	User::LeaveIfError(iSdpDB.Open(iSdp));
	// create a record of the correct service class
	TUUID serviceUUID(KBT_serviceID);
	iSdpDB.CreateServiceRecordL(serviceUUID, iRecord);

	// add a protocol to the record
	CSdpAttrValueDES* protocolDescriptorList = CSdpAttrValueDES::NewDESL(NULL);
	CleanupStack::PushL(protocolDescriptorList);

    TBuf8<1> channel;
    channel.Append((TChar)aChannel);
	// create protocol list for our service
	protocolDescriptorList
	->StartListL()   //  list of protocols required for this method
		->BuildDESL()
	    ->StartListL()
		    ->BuildUUIDL(KL2CAP)
		->EndListL()

	    ->BuildDESL()
		->StartListL()
			->BuildUUIDL(KRFCOMM)
	        ->BuildUintL(channel)
		->EndListL()
	->EndListL();

	// set protocol list to the record
	iSdpDB.UpdateAttributeL(iRecord, KSdpAttrIdProtocolDescriptorList,
		*protocolDescriptorList);
	CleanupStack::PopAndDestroy(protocolDescriptorList);

	// add a name to the record
	iSdpDB.UpdateAttributeL(iRecord,
								KSdpAttrIdBasePrimaryLanguage +
									KSdpAttrIdOffsetServiceName,
					            KBTServiceName);

	// add a description to the record
	iSdpDB.UpdateAttributeL(iRecord,
			                    KSdpAttrIdBasePrimaryLanguage +
									KSdpAttrIdOffsetServiceDescription,
					            KBTServiceDesc);

	// set service available
	UpdateAvailabilityL(ETrue);
	}


// ----------------------------------------------------------------------------
// CServiceAdvertiser::StopAdvertiserL()
//
// stop service advertiser.  delete service record from service discovery
// database to stop advertising.
// ----------------------------------------------------------------------------
void CServiceAdvertiser::StopAdvertiserL()
	{
	if ( iRecord!=0 )
		{
		// delete out record from service discovery database
		iSdpDB.DeleteRecordL(iRecord);
		// close sdp and sdp db sessions
		iSdpDB.Close();
		iSdp.Close();
		iRecord=0;
		}
	}


// ----------------------------------------------------------------------------
// CServiceAdvertiser::UpdateAvailability(TBool aAvailable)
//
// set availability of our advertised service.  the service record on the
// service discovery database will be updated accordingly.
// ----------------------------------------------------------------------------
void CServiceAdvertiser::UpdateAvailabilityL(TBool aAvailable)
	{
	TInt state = aAvailable ? 0xFF : 0x00;
	// set availability
	iSdpDB.UpdateAttributeL(iRecord, KSdpAttrIdServiceAvailability, state);
	// mark record changed
	iSdpDB.UpdateAttributeL(iRecord, KSdpAttrIdServiceRecordState,
		++iRecordState);
	}