--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linklayerprotocols/ethernetnif/EtherPkt/CardIo.cpp	Thu Mar 04 11:58:36 2010 +0000
@@ -0,0 +1,461 @@
+// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// 
+//
+
+/**
+ @file
+*/
+
+#include <nifman.h>
+#include <nifvar.h>
+#include <nifutl.h>
+#include <es_mbuf.h>
+#include "PKTDRV.H"
+#include "ETHINTER.H"
+#include "Cardctl.h"
+
+
+
+ 
+#ifdef __DebugCardLo__
+// TCP packet tracing debug
+const TUint8 ETHER2_TYPE_IP_MSB = 0x08;
+const TUint8 ETHER2_TYPE_IP_LSB = 0x00;
+const TUint8 IP_TYPE_TCP        = 0x06;
+static inline TBool IsTcp(TDesC8 &aFrame)
+{
+	return (aFrame[12] == ETHER2_TYPE_IP_MSB && aFrame[13] == ETHER2_TYPE_IP_LSB && aFrame[23] == IP_TYPE_TCP);
+}
+static TInt GetTcpSeqNumber(TDesC8 &aFrame)
+	{
+	TInt seqNum = 0;
+	if (IsTcp(aFrame))
+		seqNum = aFrame[38] << 24 | aFrame[39] << 16 | aFrame[40] << 8| aFrame[41];
+	return seqNum;
+	}
+static TInt GetTcpAckNumber(TDesC8 &aFrame)
+	{
+	TInt ackNum = 0;
+	if (IsTcp(aFrame))
+		ackNum = aFrame[42] << 24 | aFrame[43] << 16 | aFrame[44] << 8| aFrame[45];
+	return ackNum;
+	}
+#endif
+
+
+/**
+Send active object class
+When CIOBuffer's are passed to SendL() the class takes ownership and is
+therefore resposible for freeing them in the RunL()
+@internalComponent
+*/
+const TInt KTxQueueThreshold = 40;
+
+/**
+Constructor.
+*/
+CPcCardSender::CPcCardSender() : CActive(EPriorityStandard)
+{
+	
+}
+
+/**
+Destructor.
+Could be buffers on the transmit queue, free them as this class should be sole owner.
+*/
+CPcCardSender::~CPcCardSender()
+{
+	EmptyQueue();
+	Cancel();
+}
+
+/**
+Standard CActive construction.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+@return A pointer to CPcCardSender object.
+*/
+CPcCardSender* CPcCardSender::NewL(CPcCardControlEngine* aParent)
+{
+	CPcCardSender *sd=new (ELeave) CPcCardSender;
+	CleanupStack::PushL(sd);
+	sd->InitL(aParent);
+	CActiveScheduler::Add(sd);
+	CleanupStack::Pop();
+	return sd;
+}
+
+/**
+Add the newly created object to an object container.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+*/
+void CPcCardSender::InitL(CPcCardControlEngine* aParent)
+{
+	iParent=aParent;
+	iTxQueue.SetOffset(CIOBuffer::LinkOffset());
+	iQueueLength = 0;
+	iStopSending = EFalse;
+}
+
+/** 
+Protocol inspects return
+It blocks sending if it receives a return <= 0
+This value should be propogated up through the stack
+@internalComponent
+*/
+const TInt KStopSending		= 0;
+
+/**
+Protocol inspects return to indicate Keep sending the data.
+@internalComponent
+*/
+const TInt KContinueSending	= 1;
+
+/**
+Writes the data to buffer.
+
+@param aBuffer The data to be send.
+@return 0 Tells the higher layer to stop sending the data.
+		1 Tells higher layer that it can continue sending more data.
+*/
+TInt CPcCardSender::Send(CIOBuffer *aBuffer)
+{
+	
+	// Check to see if we need to start transmission
+	// Pseudo interrupt queue
+	TBool startTx = iTxQueue.IsEmpty();
+
+	iTxQueue.AddLast(*aBuffer);
+	iQueueLength++;
+	if(startTx)
+		{
+		// Transmitter was idle start next transmit
+		iParent->iCard.Write(iStatus,aBuffer->Ptr());
+		SetActive();
+		}
+	else
+	{
+	}	
+	// The stack could saturate us with data
+	// Tell the stack to send no more
+	// We will unblock the stack when the queue size drops below
+	// the the threshold
+	if(iQueueLength >= KTxQueueThreshold)
+		{
+		iStopSending = ETrue;
+		return KStopSending;
+		}
+	else
+		{
+		return KContinueSending;
+		}
+}
+
+/**
+Free all queued buffers. Should be safe as this class owns them
+*/
+void CPcCardSender::EmptyQueue()
+{
+	
+	while(!iTxQueue.IsEmpty())
+		{
+		CIOBuffer* buf = iTxQueue.First();
+		iTxQueue.Remove(*buf);
+		delete buf;
+		}
+	iQueueLength = 0;
+	iStopSending = EFalse;
+}
+
+/**
+Write completion from the LDD. Pseudo transmit interrupt handler
+*/
+void CPcCardSender::RunL()
+{
+	// Check for error, all we can do is free the buffers
+	if(iStatus.Int()!=KErrNone)
+		{
+		EmptyQueue();
+		return;
+		}
+
+	if(!iTxQueue.IsEmpty())
+		{
+		// Head of the queue has been transmitted
+		// Remove it and free it
+		CIOBuffer* buf = iTxQueue.First();
+		iTxQueue.Remove(*buf);
+		iQueueLength--;
+		delete buf;
+		
+
+		// Check to see if there are still buffers queued.
+		// Start next transmit if there are
+		TBool startTx;
+		(iTxQueue.IsEmpty()) ? (startTx = EFalse) : (startTx = ETrue);
+		if(startTx)
+			{
+			buf = iTxQueue.First();
+			iParent->iCard.Write(iStatus,buf->Ptr());
+			SetActive();
+			}
+		else
+		{
+			
+		}
+		// Resume sending if the protocol was previously blocked
+		if(iStopSending && iQueueLength < KTxQueueThreshold)
+			{
+			iStopSending = EFalse;
+			iParent->ResumeSending();
+			}
+		}
+}
+
+/**
+cancellation of an outstanding request.
+*/
+void CPcCardSender::DoCancel()
+{
+	iParent->iCard.WriteCancel();
+}
+
+/**
+Read active object class.
+Read kept permanently on the LDD
+Read completion is notified immediately up through the stack
+with the one receive buffer therefore no Q.
+*/
+CPcCardReceiver::CPcCardReceiver() : CActive(EPriorityMore)  , iRecvBufPtr(NULL,0) 
+{
+	
+}
+
+/**
+Constructor.
+*/
+CPcCardReceiver::~CPcCardReceiver()
+{
+	Cancel();
+	// One buffer only
+	delete iRecvBuffer;
+}
+
+/**
+Standard CActive construction.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+@return A pointer to CPcCardReceiver object.
+*/
+CPcCardReceiver* CPcCardReceiver::NewL(CPcCardControlEngine* aParent)
+{
+	CPcCardReceiver *rv=new (ELeave) CPcCardReceiver;
+	CleanupStack::PushL(rv);
+	rv->InitL(aParent);
+	CActiveScheduler::Add(rv);
+	CleanupStack::Pop();
+	return rv;
+}
+
+/**
+Allocate the one and only read buffer.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+*/
+void CPcCardReceiver::InitL(CPcCardControlEngine* aParent)
+{
+	iParent=aParent;
+	iRecvBufLength=KEtherBufSize;
+	iRecvBuffer=HBufC8::NewMaxL(iRecvBufLength);
+	TPtr8 temp=iRecvBuffer->Des();
+	iRecvBufPtr.Set(temp);
+}
+
+/**
+Pass the receive buffer to the Card.
+*/
+void CPcCardReceiver::QueueRead()
+{
+	iRecvBufPtr.SetMax();
+	iParent->iCard.Read(iStatus,iRecvBufPtr);
+	SetActive();
+}
+
+/**
+Pseudo read interrupt handler.
+*/
+void CPcCardReceiver::RunL()
+{
+	if (iParent->CardOpen())
+		{
+		if (iStatus.Int()!=KErrNone)
+			{
+			QueueRead();
+			return;
+			}
+		// Pass the buffer up the stack
+		// and queue the next read, safe to reuse the buffer.
+		if(iRecvBufPtr.Length())
+			{
+			iParent->ProcessReceivedPacket(iRecvBufPtr);
+			}
+		QueueRead();
+		}
+	else
+	{
+		
+	}
+}
+
+/**
+Cancellation of an outstanding request.
+*/
+void CPcCardReceiver::DoCancel()
+{
+	iParent->iCard.ReadCancel();
+}
+
+/**
+Constructor.
+*/
+CPcCardEventHandler::CPcCardEventHandler() : CActive(EPriorityStandard) 
+{
+	
+}
+
+/**
+Destructor.
+*/
+CPcCardEventHandler::~CPcCardEventHandler()
+{
+	Cancel();
+}
+
+/**
+Allocate the one and only read buffer.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+*/
+void CPcCardEventHandler::InitL(CPcCardControlEngine* aParent)
+{
+	iParent = aParent;
+}
+
+/**
+Standard CActive construction
+@param aParent Pointer to the parent CPcCardControlEngine class.
+@return A pointer to the CPcCardEventHandler object.
+*/
+CPcCardEventHandler* CPcCardEventHandler::NewL(CPcCardControlEngine* aParent)
+{
+	CPcCardEventHandler *p=new (ELeave) CPcCardEventHandler;
+	CleanupStack::PushL(p);
+	p->InitL(aParent);
+	CActiveScheduler::Add(p);
+	CleanupStack::Pop();
+	return p;
+}
+
+/**
+Handles an active object’s request completion event.
+*/
+void CPcCardEventHandler::RunL()
+{
+	// TODO Parse code in iStatus for type of event
+}
+
+/**
+Cancellation of an outstanding request.
+*/
+void CPcCardEventHandler::DoCancel()
+{
+}
+
+/**
+Gets the Event generated by the device drivers.
+*/
+void CPcCardEventHandler::GetEvent()
+{
+	// Tell the device driver we want ALL Events
+	iEventBuffer.SetLength(1);
+	iEventBuffer[0] = 0xFF;
+	SetActive();
+}
+
+/**
+Constructor.
+*/
+CPcCardIOCTL::CPcCardIOCTL() : CActive(EPriorityStandard) 
+{
+	
+}
+
+/**
+Destructor.
+*/
+CPcCardIOCTL::~CPcCardIOCTL()
+{
+	Cancel();
+}
+
+/**
+Add the newly created object to an object container.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+*/
+void CPcCardIOCTL::InitL(CPcCardControlEngine* aParent)
+{
+	iParent = aParent;
+}
+
+TInt CPcCardIOCTL::Ioctl(const TUint8 aIOCTLCode)
+{
+	if(IsActive())
+		return KErrNotReady;
+	iIOCTLBuffer.SetLength(1);
+	iIOCTLBuffer[0] = aIOCTLCode;
+	iCurrentIOCTL = aIOCTLCode;
+	SetActive();
+	return KErrNone;
+}
+
+
+/**
+Standard CActive construction.
+@param aParent Pointer to the parent CPcCardControlEngine class.
+@return A pointer to CPcCardIOCTL object.
+*/
+CPcCardIOCTL* CPcCardIOCTL::NewL(CPcCardControlEngine* aParent)
+{
+	CPcCardIOCTL *p=new (ELeave) CPcCardIOCTL;
+	CleanupStack::PushL(p);
+	p->InitL(aParent);
+	CActiveScheduler::Add(p);
+	CleanupStack::Pop();
+	return p;
+}
+
+/**
+Handles an active object’s request completion event.
+*/
+void CPcCardIOCTL::RunL()
+{
+			{
+			iParent->iReceiver->QueueRead();
+			iParent->LinkLayerUp();
+			}
+}
+
+/**
+Cancellation of an outstanding request.
+*/
+void CPcCardIOCTL::DoCancel()
+{
+}