gdpbt.cpp

《SymbianOSC手机应用开发》源码

CGdpStateMachine::TState* CGdpBTSender::TWriteState::CompleteL()
	{
	// Hey! We're done! Stop going through the state machine
	iSender.iHandler->SendComplete(KErrNone);
	return NULL;
	}

void CGdpBTSender::TWriteState::Cancel()
	{
	// Cancel any writes on the socket
	iSender.iWriteSocket.CancelWrite();
	}

/**************** GdpBTReceiver ****************/
#pragma warning(disable:4355) // Disable "C4355: 'this' used in member initialization". 

CGdpBTReceiver::CGdpBTReceiver(CGdpBTResourceManager& aResMan)
	: CGdpBTStateMachine(aResMan),
	// Initialise the two member states so they know who they're owned by
	iAcceptState(*this),
	iReadState(*this)
	{
	}

#pragma warning(default:4355) // Turn C4355 back on.

/// Just close what we opened previously
CGdpBTReceiver::~CGdpBTReceiver()
	{
DEBUG_PRINT(_L("Entering CGdpBTReceiver::~CGDBTReceiever"));
	Close();
DEBUG_PRINT(_L("Leaving CGdpBTReceiver::~CGDBTReceiever"));
	}

void CGdpBTReceiver::DoSecurityParams()
	{
	RBTSecuritySettings secset;
	RBTMan btman;
	TBTServiceSecurity service;
	TUid uid;
	uid.iUid = 0x1234;
	service.SetUid(uid);
	service.SetChannelID(11);
	service.SetProtocolID(KSolBtL2CAP);

	service.SetAuthentication(EFalse);
	service.SetAuthorisation(EFalse);
	service.SetEncryption(EFalse);
	User::LeaveIfError(btman.Connect());
	User::LeaveIfError(secset.Open(btman));
	TRequestStatus requestStatus;
	secset.RegisterService(service, requestStatus);
	User::WaitForRequest(requestStatus);
	User::LeaveIfError(requestStatus.Int());
	}

void CGdpBTReceiver::OpenL(MGdpPacketHandler& aHandler)
	{
	DEBUG_PRINT(_L("Entering CGdpBTReceiver::OpenL"));
	
	// Make sure the current iHandler is NULL - if it isn't then
	// we've already got a handler so Panic
	__ASSERT_DEBUG(iHandler == NULL, GdpUtil::Panic(GdpUtil::EReceiverInUse));

	iHandler = &aHandler;

	// Get the descriptor for protocol we are using. Better be Bluetooth...
	TProtocolDesc& desc = iResMan.ProtocolDesc();

	// Open the Listen Socket
	User::LeaveIfError(iListenSocket.Open(iResMan.SocketServer(),
	                       desc.iAddrFamily, 
						   desc.iSockType,
						   desc.iProtocol));

	// Set up the port to listen on
	TInt port = 0x0b; // Port 11 for GDP
	
	iAddr.SetPort(port);

	// Now set the socket to listen on the right port
	TInt ret = iListenSocket.Bind(iAddr);

	// If the Bind() didn't succeed we're outta here!

	if (ret != KErrNone)
		User::Leave(KErrInUse);		// Port is in use

	// Listen with a queue size of 4 (random) to allow more than 
	// one connection
	User::LeaveIfError(iListenSocket.Listen(4));

	DoSecurityParams(); 

	// Now start the state machine off to wait for an incoming connection
	ChangeState(&iAcceptState);
	}

void CGdpBTReceiver::Close()
	{
DEBUG_PRINT(_L("Entering CGdpBTReceiver::Close"));
	// If theres's no handler, it's closed already so 
	// we don't need to do anything
	if (iHandler == NULL)
		return;

	// Make sure there's no outstanding requests by cancelling them
	Cancel();

	// Close the Read and Listen sockets
	iReadSocket.Close();
	iListenSocket.Close();

	// Set the handler to NULL so we know not to close 
	// anything if we come in here again
	iHandler = NULL;
DEBUG_PRINT(_L("Leaving CGdpBTReceiver::Close"));
	}

CGdpStateMachine::TState* CGdpBTReceiver::ErrorOnStateEntry(TInt /*aError*/)
//
// This should really try to wait a little first!!!
//
	{
	// But in the mean time, just go back to the start again!
	return &iAcceptState;
	}

CGdpStateMachine::TState* CGdpBTReceiver::ErrorOnStateExit(TInt /*aError*/)
//
// Some Async request failed. Start again.
// Individual states will probably do this themselves anyway...
//
	{
	return &iAcceptState;
	}

/**************** GdpBTReceiver State transitions ****************/

CGdpBTReceiver::TReceiverState::TReceiverState(CGdpBTReceiver& aReceiver)
: iReceiver(aReceiver)
	{
	}

//--------------- Receiver Accept State ---------------//

CGdpBTReceiver::TAcceptState::TAcceptState(CGdpBTReceiver& aReceiver)
: TReceiverState(aReceiver)
	{
	}

void CGdpBTReceiver::TAcceptState::EnterL()
	{
	RSocket& readSock = iReceiver.iReadSocket;

	readSock.Close(); // Why close it? Leave it open???
    User::LeaveIfError(
		readSock.Open(iReceiver.iResMan.SocketServer()));

	// Tell socket we'll accept an incoming connection...
	iReceiver.iListenSocket.Accept(readSock, iReceiver.iStatus);
	// ...and wait
	iReceiver.SetActive();
	}

CGdpStateMachine::TState* CGdpBTReceiver::TAcceptState::CompleteL()
	{
	// Got an incoming connection! 

	// Where'd it come from?
	TL2CAPSockAddr sockAddr;
	iReceiver.iReadSocket.RemoteName(sockAddr);
	
	// Convert and store as hex in the remote address descriptor
	TBTDevAddr remAddr = sockAddr.BTAddr();
	iReceiver.iRemAddr.Zero(); // Set length to zero
	for (TInt i=0; i<KBTMaxDevAddrSize; ++i)
		{
		// 00 d0 b7 03 0e c5
		TUint16 num = remAddr[i];
		// Hack to pre-pend with a 0 if single digit hex
		if(num < 0x10)
			iReceiver.iRemAddr.AppendNum(0, EHex);

		iReceiver.iRemAddr.AppendNum(remAddr[i], EHex);
		}

	// Now read some data
	return &(iReceiver.iReadState);
	}

CGdpStateMachine::TState* CGdpBTReceiver::TAcceptState::ErrorL(TInt /*aCode*/)
	{
	return this; // Retry this state
	}

void CGdpBTReceiver::TAcceptState::Cancel()
	{
	iReceiver.iListenSocket.CancelAccept();
	}

//--------------- Receiver Read State ---------------//

CGdpBTReceiver::TReadState::TReadState(CGdpBTReceiver& aReceiver)
: TReceiverState(aReceiver)
	{
	}

void CGdpBTReceiver::TReadState::EnterL()
	{
	iReceiver.iReadSocket.Read(iReceiver.iPacket, iReceiver.iStatus);
	iReceiver.SetActive();
	}

CGdpStateMachine::TState* CGdpBTReceiver::TReadState::CompleteL()
	{
	// _LIT(KNullAddress,"");
	// Complete read by telling handler where the packet came from
	// and what was in it
	iReceiver.iHandler->GdpHandleL(iReceiver.iRemAddr, iReceiver.iPacket);
	return this;	// Queue another read, while the channel is open
	}

CGdpStateMachine::TState* CGdpBTReceiver::TReadState::ErrorL(TInt /*aCode*/)
//
// Go back to accept to pick up the next connection
//
	{
	return &(iReceiver.iAcceptState);
	}

void CGdpBTReceiver::TReadState::Cancel()
	{
	iReceiver.iReadSocket.CancelRead();
	}

/**************** GdpBTResourceManager ****************/

CGdpBTResourceManager::CGdpBTResourceManager()
	{
	}

CGdpBTResourceManager::~CGdpBTResourceManager()
	{
	Close();
	}

void CGdpBTResourceManager::OpenL()
//
// Allocate shared resources
//
	{
	// Connect to the Socket Server
	User::LeaveIfError(iSocketServer.Connect());
	// Find something in there that will give us a protocol called
	// 'L2CAP' (hopefully, Bluetooth :) )
	// This fills in the Protocol Descriptor, iProtocolDesc
	User::LeaveIfError(iSocketServer.FindProtocol(_L("L2CAP"), iProtocolDesc));
	}

void CGdpBTResourceManager::Close()
//
// Release shared resources
//
	{
	iSocketServer.Close();
	}
	

	

// Define the interface UIDs
const TImplementationProxy ImplementationTable[] =
    {
    {{0x101f8b5f}, CGdpBTComms::NewL},
    };

EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)
    {
    aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);

    return ImplementationTable;
    }

TInt E32Dll(TDllReason)
	{
	return KErrNone;
	}