irservertoclient.cpp

Symbian OS C++ for Mobile Phones Volume 3 源码

// Copyright (c) 2004 - 2007, Symbian Software Ltd. All rights reserved.

#include "infraredtransport.h"


// -------- (de)allocation --------

CIrServerToClient* CIrServerToClient::NewL(MTransportObserver& aObserver, const TDesC& aProtocolName)
/**
	Factory function allocates infrared transport.

	@param	aObserver		Observer to notify about transport events.
							This is managed by the CTransport superclass.
	@param	aProtocolName	Which protocol is used to communicate with the
							remote device.  Supported values are "IrTinyTP"
							and "Irmux".
	@return					New, connected instance of CIrServerToClient.
							This is owned by the caller.
 */
	{
	CIrServerToClient* self = new(ELeave) CIrServerToClient(aObserver);
	CleanupStack::PushL(self);
	self->ConstructL(aProtocolName);
	CleanupStack::Pop(self);
	return self;
	}

CIrServerToClient::CIrServerToClient(MTransportObserver& aObserver)
/**
	This constructor is defined to pass the supplied observer to the superclass.

	@param	aObserver		Observer to notify about transport events.
							This is managed by the CTransport superclass.
 */
:	CInfraredTransport(aObserver)
	{
	// empty.
	}

void CIrServerToClient::ConstructL(const TDesC& aProtocolName)
/**
	Connect to the remote client.  This function returns when the connection
	has been made, or has failed.

	@param	aProtocolName	Which protocol is used to communicate with the
							remote device.  Supported values are "IrTinyTP"
							and "Irmux".
 */
	{
	TRAN_LOG1(">CIrServerToClient::ConstructL,pr=\"%S\"", &aProtocolName);
	
	CInfraredTransport::ConstructL(aProtocolName);
	
	// open the receiving socket
	TInt r = iListenSocket.Open(iSocketServ, iProtoDesc.iAddrFamily, iProtoDesc.iSockType, iProtoDesc.iProtocol);
	TRAN_LOG1("-CInfraredTransport::ConstructL,lsopen=%d", r);
	User::LeaveIfError(r);
	
	TIrdaSockAddr sockAddr;
	sockAddr.SetPort(KIrSocketPortNum);
	iListenSocket.Bind(sockAddr);
	r = iListenSocket.Listen(/*qSize*/ 1);
	TRAN_LOG1("-CInfraredTransport::ConstructL,listen=%d", r);
	User::LeaveIfError(r);
	
	// open blank socket to accept incoming connection
	r = iSocket.Open(iSocketServ);
	TRAN_LOG1("-CInfraredTransport::ConstructL,open=%d", r);
	User::LeaveIfError(r);
	
	// accept an incoming connection
	iListenSocket.Accept(iSocket, iStatus);
	SetActive();
	
	// dialog will be dismissed by the user or by RunL
	r = (! iObserver.StartedWaitingForClientL()) ? KErrCancel : iAcceptError;
	TRAN_LOG1("-CInfraredTransport::ConstructL,accept=%d", r);
	User::LeaveIfError(r);
	
	CTransport::ConstructL(/*aInitListen*/ EFalse);
	TRAN_LOG0("<CIrServerToClient::ConstructL");
	}

CIrServerToClient::~CIrServerToClient()
/**
	Free resources used specifically by the server to client layer.
 */
	{
	Cancel();
	CloseDataSocket();
	iListenSocket.Close();
	}

// -------- implement CActive / override CTransport --------

void CIrServerToClient::RunL()
/**
	Implement CActive and override CTransport by handling accept event.
	If the socket is already connected then delegate to CInfraredTransport which
	will convert the payload from 8 bit to native width.
  */
	{
	TRAN_LOG2(">CIrServerToClient::RunL,st=%d,ac=%d", iStatus.Int(), iAccepted);
	
	// if already accepted, must be data transfer operation, so handle in superclass.
	if (iAccepted)
		CInfraredTransport::RunL();
	else
		{
		iAcceptError = iStatus.Int();
		iAccepted = ETrue;
		iObserver.StoppedWaitingForClient();
		}
	
	TRAN_LOG0("<CIrServerToClient::RunL");
	}

void CIrServerToClient::DoCancel()
/**
	Implement CActive and override CInfraredTransport by
	cancelling any pending acceptance.  If the socket is already
	accepted then call CInfraredTransport::DoCancel to cancel
	any pending read or write.
 */
	{
	if (! iAccepted)
		iListenSocket.CancelAccept();
	else
		CInfraredTransport::DoCancel();
	}