obex/obexprotocol/obextransport/src/obexactivereader.cpp
author hgs
Tue, 19 Oct 2010 11:00:12 +0800
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201041_03
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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include <obex/transport/obexactivereader.h>
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#include <es_sock.h>
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#include "logger.h"
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#ifdef __FLOG_ACTIVE
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_LIT8(KLogComponent, "OBEXCT");
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#endif
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/**
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Factory function.
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@param  aOwner the owner of this 
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@param aSocket  a socket for reading and writing
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@param aInfo connection information
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@return Ownership of a new active reader.
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*/
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EXPORT_C CObexActiveReader* CObexActiveReader::NewL(MObexTransportNotify& aOwner, RSocket& aSocket, TObexConnectionInfo& aInfo)
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	{
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	CObexActiveReader* self = new(ELeave) CObexActiveReader(aOwner, aSocket, aInfo);
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	CleanupStack::PushL(self);
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	self->BaseConstructL();
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	CleanupStack::Pop(self);
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	return self;
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	}
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/**
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Constructor
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@param  aOwner the owner of this 
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@param aSocket  a socket for reading and writing
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@param aInfo connection information
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*/
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CObexActiveReader::CObexActiveReader (MObexTransportNotify& aOwner, RSocket& aSocket, TObexConnectionInfo& aInfo)
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	: CObexReaderBase (EPriorityStandard, aOwner, aInfo),
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	iSocket(aSocket)
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	{
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	LOG_LINE
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	LOG_FUNC
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	}
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/**
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Destructor
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*/
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EXPORT_C CObexActiveReader::~CObexActiveReader ()
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	{
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	LOG_LINE
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	LOG_FUNC
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	Cancel ();
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	}
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/**
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Called to actually transfer some data into iLocation 
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*/
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void CObexActiveReader::DoTransfer ()
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	{
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	LOG_FUNC
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	iSocket.Recv(iLocation, KSockReadContinuation, iStatus);
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	SetActive ();
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	}
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/**
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Return the maximum packet size
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@return TInt the maximum packet size for this transport
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*/
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TInt CObexActiveReader::GetMaxPacketSize()
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	{
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	LOG_FUNC
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	// Some slightly dubious logic here...
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	// IrDA has a degenerate case when running over a 256 byte transport layer link, we claim
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	// to support <255 bytes. The Obex spec says that all stations must be able to handle
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	// 255 bytes, so some stacks may ignore our limit.
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	// Thus we compare against the actual buffer size, rather than what we told the remote end
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	// we could handle, so we *may* be able to handle being sent a few bytes more than expected...
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	TInt ret = GetObexPacketBufferSize();
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	LOG1(_L8("\tret = %d"), ret);
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	return ret;
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	}
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/**
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Returns a initial packet size when the packet size of iPacket is not know.  This is used
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when determining the remaining bytes to be read.  
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@return TInt the initial packet size
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*/
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TInt CObexActiveReader::GetInitialPacketSize ()
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	{
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	LOG_FUNC
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	return GetObexPacketHeaderSize();
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	}
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void CObexActiveReader::DoCancel ()
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	{
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	LOG_FUNC
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	iSocket.CancelRecv ();
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	}